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1
Hodgson, B. A., and G. Pitts. "Designing for CNC Manufacture." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 203, no. 1 (1989): 39–45. http://dx.doi.org/10.1243/pime_proc_1989_203_146_02.
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An alternative to the transfer of components between machine tools is proposed that makes more effective use of stand-alone CNC machine tools. A design discipline is suggested whose adoption results in components that satisfy the function requirement and which can be machined in a single setup. This results in easier machine-shop scheduling and more straightforward assembly, since the latter is always from a single direction.
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Prodan, Dan, Anca Bucuresteanu, Tiberiu Dobrescu, and Adrian Motomancea. "Rotary Tables for Machine Tools." Applied Mechanics and Materials 841 (June 2016): 168–72. http://dx.doi.org/10.4028/www.scientific.net/amm.841.168.
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In this paper the authors present some theoretical and experimental research carried out during the manufacture of a rotary table for CNC machine-tools AF type. There are shown the calculation methods in static and dynamic conditions for the indexable rotary tables and also for those that operate as numerically controlled “B” axes. The calculation methods were tested by manufacturing several such tables intended for the machines belonging to AF(P)100-180 range.
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Corbett, J. "Smart machine tools." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 212, no. 3 (1998): 203–13. http://dx.doi.org/10.1243/0959651981539406.
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Improved manufacturing methods have become crucial factors in retaining global competitiveness for a wide range of products. This has led to the development of new automatic supervision techniques for use in smart machine tools. These are necessary because it is not possible to design and manufacture machine tool structures and systems with work zone areas of sufficient accuracy and repeatability to meet the improved performance requirements demanded by many modern manufacturing companies. The principal areas for automatic supervision of the machine tool are the tooling, appropriate machine elements and the overall machine system. Thermal effects have been shown to be the largest source of dimensional errors and apparent non-repeatability of machines. Therefore, for the highest precision machines on-line temperature monitoring and control is of paramount importance. This paper describes the application of automatic supervision techniques applied to the NION diamond turning and grinding machine, developed by Cranfield Precision Engineering Limited, which is the most accurate machine tool, of its size, currently available, as well as an ultra precision five-axis grinding machine, built in Japan by the Toyoda Machine Works Limited. In addition, following a project at Cranfield University, the benefits of on-line measuring techniques are discussed in obtaining new cost effective manufacturing methods for producing aero-engine turbine blades. Further examples are given, including major projects at Liverpool John Moores University and Eindhoven University of Technology, where significant improvements in accuracy capabilities were obtained for a standard cylindrical grinding machine and a five-axis vertical milling machine.
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Bazrov, B. M., and M. L. Kheifetz. "Layout synthesis based on the modular principle of the element base of mechatronic technological complexes." Doklady of the National Academy of Sciences of Belarus 66, no. 2 (2022): 229–36. http://dx.doi.org/10.29235/1561-8323-2022-66-2-229-236.
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The main shortcomings of modern technological machine-tool complexes are shown. They are: the lack of consideration of individual consumer needs and their insufficient flexibility that do not take into account the trend of rapid changes in the production program. A concept for the development of metal-cutting machine tools based on the principles of the modular technology is proposed. The created machine tool complexes are designed to satisfy the individual needs of consumers, while the flexibility of production equipment should ensure the transition to the manufacture of new parts and the replacement of the technological processing scheme by changing the processing modes, readjustment and reconfiguration of machines; the development of machine tools should be carried out simultaneously with the improvement of the technology of processing parts. Technological complexes should be created by the layout synthesis using the element base that should contain two groups of functional modules, technological and service, and the service purpose of the machine should include the range of both the manufactured surface modules with their characteristics and the modules of technological support.
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Xiu, Peng Bo, and Tian Le Zhang. "Design of Technical Information Management System for Machine Tool Workbench." Applied Mechanics and Materials 328 (June 2013): 219–23. http://dx.doi.org/10.4028/www.scientific.net/amm.328.219.
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Machine workbench is a key parts of CNC machine tool. Taking into account the demand of machine tool factory for machine workbench technical information management, the management database system of machine workbench technical information is developed by Microsoft Access software. This system can save the type and specification information of the machine workbenches and the technical drawings, record the experience of the workbenches, produce the summary table of the major technical parameters and form the application information automatically, and provide the information and data support for the design and manufacture of CNC machine tools. As a result, the information database is integrated efficiently for the CNC machine tool manufactory.
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Wang, Liyu, Luzius Brodbeck, and Fumiya Iida. "Mechanics and energetics in tool manufacture and use: a synthetic approach." Journal of The Royal Society Interface 11, no. 100 (2014): 20140827. http://dx.doi.org/10.1098/rsif.2014.0827.
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Tool manufacture and use are observed not only in humans but also in other animals such as mammals, birds and insects. Manufactured tools are used for biomechanical functions such as effective control of fluids and small solid objects and extension of reaching. These tools are passive and used with gravity and the animal users' own energy. From the perspective of evolutionary biology, manufactured tools are extended phenotypes of the genes of the animal and exhibit phenotypic plasticity. This incurs energetic cost of manufacture as compared to the case with a fixed tool. This paper studies mechanics and energetics aspects of tool manufacture and use in non-human beings. Firstly, it investigates possible mechanical mechanisms of the use of passive manufactured tools. Secondly, it formulates the energetic cost of manufacture and analyses when phenotypic plasticity benefits an animal tool maker and user. We take a synthetic approach and use a controlled physical model, i.e. a robot arm. The robot is capable of additively manufacturing scoop and gripper structures from thermoplastic adhesives to pick and place fluid and solid objects, mimicking primates and birds manufacturing tools for a similar function. We evaluate the effectiveness of tool use in pick-and-place and explain the mechanism for gripper tools picking up solid objects with a solid-mechanics model. We propose a way to formulate the energetic cost of tool manufacture that includes modes of addition and reshaping, and use it to analyse the case of scoop tools. Experiment results show that with a single motor trajectory, the robot was able to effectively pick and place water, rice grains, a pebble and a plastic box with a scoop tool or gripper tools that were manufactured by itself. They also show that by changing the dimension of scoop tools, the energetic cost of tool manufacture and use could be reduced. The work should also be interesting for engineers to design adaptive machines.
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Boral, Piotr, Tadeusz Nieszporek, and Rafał Gołębski. "The welded CNC machine tool frame." MATEC Web of Conferences 157 (2018): 01003. http://dx.doi.org/10.1051/matecconf/201815701003.
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Machine tools are built based on cast-iron bodies. Cast iron well dumps down vibrations and is dimensionally stable. Therefore, many conventional machine tools are modernized and modified into CNC machine tools based on the seasoned old bodies of those machine tools. Nevertheless, CNC machine tools are also manufactured based on polymer concrete, which vibration damping ability is even better. On the other hand, attempts made in the past by leading machine tool manufacturers to use welded frames in CNC machine tools failed. The revival of interest in welded frames was spurred by economic considerations, as steel systems are much thinner compared to cast-iron ones. They are able to carry the same loads. The construction of CNC machine tools with a welded steel frame undertaken at the Institute of Mechanical Technologies (ITM) of the Czestochowa University of Technology is an attempt to solve this constructional problem. The machine tool frame was designed with use of CAD solid works system. The ultimate success of using the welded frame is determined not only by the frame itself, but also generally the design of the machine tool and its operation parameters. The welded frame was used for a high-accuracy three-axis milling machine. In this respect, it is equal of professional machine tools manufactured by reputed companies. It can be either a production machine tool or a test stand.
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Sheng, Zhong Qi, Ze Zhong Liang, Chao Biao Zhang, and Liang Dong. "LabVIEW-Based Wireless Monitoring System of CNC Machine Tools." Applied Mechanics and Materials 121-126 (October 2011): 2075–79. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.2075.
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As the development of industry wireless networks, sensor network, innovative sensors, radio frequency identification (RFID), and micro-electro-mechanical system (MEMS) technologies, the industry sector has made great progress in data acquisition, treatment, transfer and analysis, greatly expanded people’s ability to access information, and to control and use them. This paper developed a wireless data acquisition and storage system of CNC machine tools based on LabVIEW graphical programming language and IEEE 802.11 wireless communication protocol, effectively expanded the ability to access and use the CNC machine status information; solved the problem of data collection caused by the environment complexity of manufacture workshop and the hardness of wiring; eliminated the dead zone of manufacture workshop in the processing of the data acquisition of state information of bottom processing equipment; made the bottom machining unit no longer be the information island for manufacturing enterprises.
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Weisdiyanti, Nurhikmah, Kiki Santoso, Riri Syavira, Liza Karina Octovyanda Pohan, Rionaldo Tamba, and Rita Juliani. "DESIGN OF A PINEAPPLE LEAF FIBER DECORTICATOR MACHINE." Jurnal Geliga Sains: Jurnal Pendidikan Fisika 7, no. 1 (2019): 18. http://dx.doi.org/10.31258/jgs.7.1.18-23.
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The manufacture of pineapple leaf fiber decorticator machines has been made in the village of Onan RungguIII, Sipahutar District, North Tapanuli Regency. Machine making aims to help pineapple farmers toovercome the problem of waste and pineapple. The method used starts from feasibility studies, designingmachines, collecting and purchasing tools and materials, evaluating results and testing tools. Resultsobtained by the pineapple leaf fiber decorticator machine 0,12 kg/hour obtained through two stages ofgrinding namely grinder 1 and grinder 2. The final results obtained from the decorticator machine ofpineapple leaf fiber are pineapple leaf fibers that can be used to make raw materials for textile products.
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Syavira, Riri, Tiaminah Nasution, Raisa Nabila, and Rita Juliani. "DESIGN AND BUILD SALAK (Salacca Sumatrana) EMBALMING MACHINE WITH CONVEYOR." Jurnal Geliga Sains: Jurnal Pendidikan Fisika 6, no. 1 (2018): 60. http://dx.doi.org/10.31258/jgs.6.1.60-64.
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It has been done the manufacture of Salak embalming machine for partners of Lopo Salak inPadangsidempuan. This machine can be used to assist partners in the process of embalming Salak to produce good quality and guaranteed freshness. The steps in the manufacture of this machine start from the design, the provision of tools and materials, manufacture and test the machine. The results show that the machine works optimally with the average production of salak 25 kg/hour due to embalming. In addition, the embalming machine has a propulsion engine that serves as the embalming and drying of Salak.
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Hu, Ping, and Guo Fu Yin. "The Build of Digitized Design and Manufacture System for NC Machine Tool." Applied Mechanics and Materials 37-38 (November 2010): 1411–15. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.1411.
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According to the development of Numerical Control (NC) machine tool’s manufacture, the way to build a platform of digitized design and manufacture system for NC machine tool was proposed, in which the various and relatively simplex digitized technologies were conformed as well as closely combined with the network and information technologies. From that, the real-time and parallel simulation in the whole process of NC machine tool’s design and manufacture would be achieved. Along with the all-sided expanding of digitized technology in the design field of NC machine tool, the corporations’ colligation which includes design, manufacture and management would be greatly upgraded and the development of entire manufacture will be expedited. And the mechanical equipments’ design and manufacture will be promoted at a larger-scale.
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Baidilah, Arif, Kardiman Kardiman, and Farradina Choria Suci. "Rancang Bangun Mesin Penggiling Sekam Padi Menjadi Bahan Pakan Ternak (Dedak)." Jurnal Teknik Mesin 14, no. 1 (2021): 22–26. http://dx.doi.org/10.30630/jtm.14.1.464.
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In the development of technology and industry, a lot of tools are made to make it easier to do work. In the farming sector, a lot of tools are needed to facilitate development in the farming sector. One of the tools needed is a machine to make animal feed. One of the ingredients for making animal feed is bran, bran produced from the process of milling rice husks. To produce bran, a tool that can crush rice husks into the form of flour is designed to make animal feed suitable, as well as make the shape of a portable grinding machine. In this design, data collection steps were carried out with literature studies and after that carried out experiments on the manufacture of rice husk grinding machines. In conducting the experiment, the concept of design, design, calculation, manufacture and testing of grinding machines was also carried out. The result of this design is the design of a grinding machine and a grinding machine that can smooth rice husks into flour and portable forms. The specifications of the rice husk grinding machine are a frame with a length of 580 mm, a width of 380 mm and a height of 995 mm. Drive source 7 HP petrol motor with belt pulley transmission. The speed of the grinding blade shaft can be changed by replacing the pulley on the driving motor so that it can determine the fineness of the bran and the speed of the grinding. As well as the filter on the milling section can be replaced in order to adjust to the required level of fineness.
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Kondakov, A. I. "PRODUCTIVITY OF MACHINE TOOLS AND PRODUCTION SYSTEMS." Spravochnik. Inzhenernyi zhurnal, no. 277 (April 2020): 52–55. http://dx.doi.org/10.14489/hb.2020.04.pp.052-055.
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Productivity is the most important indicator of labor efficiency. Productivity estimates poorly take into account the interaction of production systems equipment and the technological complexity of labor objects. There is proposed an integral assessment of the performance of these systems, which characterizes the effectiveness of the financial expenses of production resources in the manufacture of parts. It is proposed to characterize their technological complexity by multiplying the increase in the labor subject value after technological impact by the part release volume. The proposed assessment can be used in the development of software applications that automate the tasks of analyzing the effectiveness of production systems.
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Kondakov, A. I. "PRODUCTIVITY OF MACHINE TOOLS AND PRODUCTION SYSTEMS." Spravochnik. Inzhenernyi zhurnal, no. 277 (April 2020): 52–55. http://dx.doi.org/10.14489/hb.2020.04.pp.052-055.
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Productivity is the most important indicator of labor efficiency. Productivity estimates poorly take into account the interaction of production systems equipment and the technological complexity of labor objects. There is proposed an integral assessment of the performance of these systems, which characterizes the effectiveness of the financial expenses of production resources in the manufacture of parts. It is proposed to characterize their technological complexity by multiplying the increase in the labor subject value after technological impact by the part release volume. The proposed assessment can be used in the development of software applications that automate the tasks of analyzing the effectiveness of production systems.
15
Murugan, S., and PR Thyla. "Mechanical and dynamic properties of alternate materials for machine tool structures: A review." Journal of Reinforced Plastics and Composites 37, no. 24 (2018): 1456–67. http://dx.doi.org/10.1177/0731684418799946.
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Machine tool structures find large-scale applications in various machining industries due to their necessity to design several kinds of machines. However, the vibration produced on machining is a significant problem which has to be overcome. To suppress the vibration, several researchers have attempted to enhance the machine tool structure’s dynamic characteristics in the recent past. The composite materials have risen up as a new kind of material for the manufacture of machine tool structures with producing lesser vibrations since the past few decades. To increase the production of precision products, machining should be done at high speeds without producing vibration. The dynamic characteristics such as natural frequency as well as damping of machine tool structures are very important parameters. Hence, the improvement of these parameters is nothing but the improvement of dynamic characteristics, as said earlier. Therefore, the present review elaborates various available reports on the improved dynamic characteristics of machine tools. The review focused mainly on mechanical and dynamic properties of alternate materials for machine tools with different composite materials. Furthermore, conflicting conditions of suitable alternate material for the preparation of machine tools are also focused in the present review. To the best of our knowledge, the review on the use of alternate materials for the manufacturing of machine tool structures has not been reported elsewhere and hence the present review will provide useful information for subsequent researchers to enhance the scope of research work in the area of manufacturing machine tool structures.
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Tian, Wenjie, Shaopeng Liu, and Xingxing Liu. "Accuracy design of high precision machine tools using error sensitivity analysis methodology." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 231, no. 18 (2016): 3401–13. http://dx.doi.org/10.1177/0954406216645625.
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Geometric accuracy is a crucially important performance factor for machine tools. Theoretically, the effects of source errors on pose accuracy (positional and angular accuracy) of 3-, 4- or 5-axis machine tools cannot fully be compensated by software, and only those pose errors associated with the permission motions are compensatable by means of error compensation. Therefore, the uncompensatable pose errors should be strictly guaranteed in the processes of design and manufacture. In this paper, after the geometric error model is established, the source errors affecting the uncompensatable pose accuracy are identified out of all the source errors. In order to enhance the understanding of which source errors have more influences on the pose accuracy, a probabilistic sensitivity analysis method is proposed, and the global sensitivity index is defined to evaluate the influence in the overall workspace. According to the sensitivity analysis results, the uncompensatable pose accuracy index is allocated to each source error. And then, assembly accuracy acceptance criteria are proposed as a guideline for machine assemblers. As an application example, the presented approaches are applied to the accuracy design and manufacture of a 4-axis machine tool, and double ball bar measurement and machining test are carried out to check the accuracy of the designed machine tool.
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Zhou, Zhe Bo, Jin Long Zhang, Nan Nan Zhu, Hai Zhen Liang, and Qing Hong Zhou. "Study on the Trial-Manufacture of a Large Discharge Emulsification Pump's Crankshaft." Applied Mechanics and Materials 138-139 (November 2011): 780–85. http://dx.doi.org/10.4028/www.scientific.net/amm.138-139.780.
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Aimed at the work condition and structure's characteristics of a large discharge emulsification pump's crankshaft, the load type of a low rotational speed and high load were determined, and the quality of a crankshaft is related with material, manufacture, heat treatment and so on. Based on unit production model during the research and development, the processes of the roughcast, manufacture and heat treatment were described: The roughcast was forged by a forging die in order to suffice a low rotational speed and high load. The crankshaft was manufactured by a universal machine tool, clamps and measuring tools in order to obtain the precision of specification after processing. Heat refining after rough cutting, nitrogen treatment and polishing after finish machining were selected in order to improve mechanical property, application life and cost reduction.
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Syarief, Akhmad, and Akhmad Maulana Gumai. "PROSES MANUFAKTUR MESIN GERGAJI KAYU UNTUK PENGRAJIN PALET KAYU." Scientific Journal of Mechanical Engineering Kinematika 2, no. 1 (2017): 1–10. http://dx.doi.org/10.20527/sjmekinematika.v2i1.32.
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Wood saws are hand machines that small industries need. Almost all work processes through a saw machine with good results. Circular saws are not only used in timber industry, but also in the carbuery industry, by plumbing, construction experts, loggers or gardenists. In any hobby there are wearing it. For manufacturing process of making wood sawing machine in allotment for wooden pallet craftsman. The formulation of the problem in making this saw machine is how to manufacture wood saw process for wooden pallet craftsman and howmuch budget cost in manufacturing process of saw machine for wooden pallet craftsman. The components of the saw machine are frame, table mat, bearing, shaft, pulley transmission and V belt, while the tools and machinery used in the manufacturing process are electric welding tools, electric grinding wheels, grinding wheels, lathes, and frais machines.
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Kong, Nan Xi, Silka Grimske, Benny Roehlig, and Jens P. Wulfsberg. "About Determining the Error Budget of a Miniaturized, Modular Machine Tool System for Micro Production." Key Engineering Materials 523-524 (November 2012): 662–67. http://dx.doi.org/10.4028/www.scientific.net/kem.523-524.662.
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Since micro products have become smaller, the requirements concerning precision and accuracy for producing machine tools to manufacture such small parts increased. Consequently, each component of a machine tool needs to conform to these requirements. A flexure-based feed unit, a clamping system and mechanical couplings are briefly presented. These components can quickly be reconfigured, which allows for a new modular micro machine tool system. Each component incorporates individual precision and accuracy leading to an overall error budget for a machine tool system. This is methodically addressed in the contribution.
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Ariyanto, Ariyanto, Husman Husman, and Yuli Dharta. "Tinjauan Performansi Bubut Doll LT13 Terhadap Penyimpangan Kebulatan Benda Kerja." Manutech : Jurnal Teknologi Manufaktur 9, no. 02 (2019): 45–49. http://dx.doi.org/10.33504/manutech.v9i02.45.
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The industry manufacture with high quality and able to pruduce the workpicece with high quality In industry manufacture are very necessary. The use of high quality machines should be supported by the ability to operate and the ability to perform maintenance, this ability is useful to maintain the condition of the machine in order to produce good quality workpieces. Politeknik Manufaktur Negeri Bangka Belitung has several high quality machine tools, one type of machine tools usually use is lathe machine doall LT13 with total have six units. this machine Used to support education and to produce spare parts. Doall LT13 lathes have been used for 22 years, during that period there may be deviation of machine geometry, deviations that occur can lead to decreased quality of the resulting workpiece. This study aims to determine the feasibility of the machine by measuring the roundness of the spicemen of the process of turning, the roundness of the specimen is analyzed by using the minimum circle method. From the roundness testing performed on the doall lt 13 the result� that can be achieved as follows 0,082 mm at lathe number 8, 0,073 mm at lathe number 5, 0,057 mm at lathe number 7, 0,051 mm at lathe� number 2, 0,048 mm at lathe number 6 and 0,046 mm at lathe number 3.
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Takeuchi, Yoshimi. "Multi-Axis Control Ultraprecision Micromilling." Key Engineering Materials 447-448 (September 2010): 801–5. http://dx.doi.org/10.4028/www.scientific.net/kem.447-448.801.
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In recent years, ultraprecision micromachining technology draws wide attention. In particular, multi-axis control ultraprecision machine tools are playing an important role in producing complicated microparts made of a variety of materials. In addition, CAM software is also an essential element to control these machine tools. The paper deals not only with the current state of multi-axis control ultraprecision machine tools but also with the manufacture of two workpieces consisting of complicated shapes by means of micromilling.
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Haikova, Tetiana, and Viktoriia Kulynych. "IMPROVING THE WORK EFFICIENCY IN THE WORKSHOPS FOR THE TECHNOLOGICAL EQUIPMENT MANUFACTURE FOR PROCUREMENT PRODUCTION." Transactions of Kremenchuk Mykhailo Ostrohradskyi National University, no. 5(130) (October 27, 2021): 68–73. http://dx.doi.org/10.30929/1995-0519.2021.4.68-73.
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Purpose. The work purpose is to increase the efficiency in the manufacturing technological equipment shops for pro-curement and stamping production on the basis of creating an optimal process of reconfiguration of equipment when changing the range of machined parts of equipment. Methodology. Cluster analysis, as a way of grouping multidimen-sional objects, is based on the presentation of the results of individual observations by points in the required geometric space. Logical connections between technical-technological and constructive signs of details and requirements to adjustment of the machine. Findings. The classifier presence of manufactured products allows to determine the typical values of the tool output required for the product elements processing. By unifying the value of the end tool departure in accordance with the typical values of the workpiece height, it is possible to eliminate the need to change the tool setting composition when switching to a new planning unit and the task of the tool production time correcting. The smaller the unique range of tools, the faster production can be rebuilt for a new order. Originality. The introduction into the functional dependence of the end mill cutter on its geometrical parameters - the ratio of the departure length to the length of the cutting part from 0.1 to 0.5 to take into account the influence of cross-section inhomogeneity is substantiated. Practical value. Having an idea of the parts design and technological features, they can be grouped by the homogeneity of the features by cluster analysis to achieve a minimum of readjustment. Conclusions. Logical connections between technical-technological and structural details features and requirements to machine tool adjustment which allowed to present a method of planning units grouping on technical-technological features commonality, such as necessary equipment, devices and tools, by means of cluster analysis for reducing the transition time to a new product and, consequently, downtime. The equation for determining the end mill cutter in the tangential cutting force direction has been modified taking into account the cross section inhomogeneity, tool geometry, and machine rigidity, which allows to unify the tool setting for the end tool departure by determining the footprint and error the machined contour. References 15, figures 4.
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Kawasaki, Kazumasa, Isamu Tsuji, and Hiroshi Gunbara. "Manufacturing method of double-helical gears using CNC machining center." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 7-8 (2015): 1149–56. http://dx.doi.org/10.1177/0954406215602288.
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Double-helical gears are usually manufactured using special type of machine tools, such as gear hobbing and shaping machines. In this paper, a manufacturing method of double-helical gears using a CNC machining center instead of the special type of machine tools is proposed. This manufacturing method has the following advantages: (i) the tooth surfaces can be modified arbitrarily, (ii) all we have to do in gear machining is only one machine setting, (iii) the hole and blank diameter and so on except the tooth surface can be also machined, and (iv) the auxiliary apparatus, special type of tools, and special type of machine tools are not needed. For this study, first the tooth profiles of the double-helical gear were modelled using a 3D computer-aided design system and the gear was machined using a CNC machining center based on a computer-aided manufacturing system. Next, the profile deviations, helix deviations, pitch deviations, and surface roughnesses of the manufactured double-helical gears were measured. Afterwards, the relationship between the tool wear and life time of the end mill were made clear. Finally, this manufacturing method was applied to the gears for a double-helical gear pump. As a result, the validity and effectiveness of the manufacturing method of double-helical gears using a CNC machining center were confirmed.
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Liu, Huan Lao, Zuohui Zhou, Bao Yue Chen, Feng Liu, Feng Lin Ye, and Guang Yu Tan. "Granite Step Gauge: A New Device for Error Measurement on CNC Machine Tools." Advanced Materials Research 472-475 (February 2012): 328–31. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.328.
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A simple pitch error of lead screw error measurement based on the granite step gauge has been presented in this paper. This method has the advantages of easy operation, less time cost and also high accuracy. this method is expected to find wide applications in machine calibration, machine manufacture and error compensation.
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Qosim, Nanang, and Mohammad Hartono. "Machining time and number of machine for the production planning of wheel nut releaser with the demand of 100 units/day." International Journal of Advances in Applied Sciences 8, no. 1 (2019): 8. http://dx.doi.org/10.11591/ijaas.v8.i1.pp8-13.
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The impact of competition in the industry has driven people to improve the effectiveness of production process. One of the main factors supporting that effectiveness is the good planning of both the need and the number of machines. The aim of this study is to estimate the machining times to determine the number of machines to manufacture 100/day of the nut releaser tool for car wheel. The result shows that the need of the number of machines to manufacture each component of the nut releaser tool for car wheel are 7 units of power hacksaw, 27 units of lathe machine, 8 units of drilling machine, 12 units of milling machine, 2 units of EDM machine and 25 units of bench work.
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Hackney, Philip Mark, and Richard Wooldridge. "Characterisation of direct 3D sand printing process for the production of sand cast mould tools." Rapid Prototyping Journal 23, no. 1 (2017): 7–15. http://dx.doi.org/10.1108/rpj-08-2014-0101.
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Purpose Metal casting industry is in recovery phase after the crisis in 2008; customer demand continues to increase, with 98.6 million metric tons cast in 2011. Traditional ferrous and non-ferrous casting techniques require one shot or permanent moulds which require tooling to produce. Tooling particularly for developmental projects can be costly and take valuable time to produce. Additive manufacturing (AM) has been used to manufacture sand patterns for metal sand casting using laser sintering and sand bonding. This research aims to focus on characterising the sand-bonded process developed by ExOne GmbhH Germany. Design/methodology/approach The approach taken in this research is to evaluate characteristics of parts built in the build volume for dimensional accuracy, tensile and compressive crush strength, density, impact strength and high temperature resistance. These properties are required to compare the 3D sand printing (3DSP) process to direct laser sand sintering (DLSS) and traditional Furan-based casting sand mixtures. The samples were taken from a production machine over a period of 30 days to ensure consistency. Findings The 3DSP process has the capability to manufacture sand patterns to an accuracy of ±0.5 mm or error less than 0.3 per cent; it has also demonstrated the best build position to achieve accurate parts. The research has demonstrated the 3DSP patterns are comparable to traditional methods for important casting material characteristics such as tensile, compression and impact strength. It has been shown that the 3DSP process is capable manufacturing significantly larger parts, with build production rates up to 30 times higher compared to similar parts manufactured via the DLSS process. Research limitations/implications As they has been very few 3DSP machines sold in Europe and particular UK, they has been little research into this new technique, and, therefore, they is a reliance on machine manufactures data for assessment. This research into 3DSP has increased the knowledge of this process significantly. Practical implications This research would be of interest to designers and manufacturing engineers wishing to take advantage of the implications of having new design freedom, tool less manufacturing with short lead times in a wide range of materials using fundamentally tried and tested century’s old casting techniques. Originality/value The research for this paper revealed very little published academic research in this area; therefore, this work will increase the body of knowledge for this niche AM process.
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Abul’khanov, S. R., N. L. Kazanskii, L. L. Doskolovich, and O. Yu Kazakova. "Manufacture of diffractive optical elements by cutting on numerically controlled machine tools." Russian Engineering Research 31, no. 12 (2011): 1268–72. http://dx.doi.org/10.3103/s1068798x11120033.
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Chinnuraj, Shanmugam, PR Thyla, S. Elango, et al. "Static and dynamic behavior of steel-reinforced epoxy granite CNC lathe bed using finite element analysis." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 234, no. 4 (2020): 595–609. http://dx.doi.org/10.1177/1464420720904606.
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Machine tools are used to manufacture components with desired size, shape, and surface finish. The accuracy of machining is influenced by stiffness, structural damping, and long-term dimensional stability of the machine tool structures. Components machined using such machines exhibit more dimensional variations because of the excessive vibration during machining at higher speeds. Compared to conventional materials like cast iron, stone-based polymer composites such as epoxy granite have been found to provide improved damping characteristics, by seven to ten folds, due to which they are being considered for machine tool structures as alternate materials. The stiffness of structures made of epoxy granite can be enhanced by reinforcing with structural steel. The current work highlights the design and analysis of different steel reinforcements in the lathe bed made of the epoxy granite composite to achieve equivalent stiffness to that of cast iron bed for improved static and dynamic performances of the CNC lathe. A finite element model of the existing the cast iron bed was developed to evaluate the static (torsional rigidity) and dynamic characteristics (natural frequency) and the results were validated using the experimental results. Then finite element models of five different steel reinforcement designs of the epoxy granite bed were developed, and their static and dynamic behaviors were compared with the cast iron bed through numerical simulation using finite element analysis. The proposed design (Design-5) of the epoxy granite bed is found to have an improvement in dynamic characteristics by 4–10% with improved stiffness and offers a mass reduction of 22% compared to the cast iron bed, hence it can be used for the manufacture of the CNC lathe bed and other machine tool structures for enhanced performance.
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Oda, Yohei, Makoto Fujishima, Yoshikazu Kawamura, and Morihiro Hideta. "Energy Reduction of Machine Tools." Key Engineering Materials 523-524 (November 2012): 985–90. http://dx.doi.org/10.4028/www.scientific.net/kem.523-524.985.
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Machine tools, which are used in factories for long hours and many years, have a great influence on power consumption of the factories. Therefore, reducing machine tool power consumption is one of the important subjects for today’s machine tool manufacturers. In this paper, we will report on our ongoing efforts to improve energy efficiency of machine tools.
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Mir, Y. A., J. R. R. Mayer, and C. Fortin. "Tool path error prediction of a five-axis machine tool with geometric errors." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 216, no. 5 (2002): 697–712. http://dx.doi.org/10.1243/0954405021520391.
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Predicting the actual tool path of a machine tool prior to machining a part provides useful data in order to ensure or improve the dimensional accuracy of the part. The actual tool path can be estimated by accounting for the effect of the machine tool geometric error parameters. In computer aided design/computer aided manufacture (CAD/CAM) systems, the nominal tool path [or CL (cutter location) data] is directly generated from the curves and surfaces to be machined and the errors of the machine tool are not considered. In order to take these errors into consideration, they must first be identified and then used in the machine tool forward kinematic model. In this paper a method is presented to identify the geometric errors of machine tools and predict their effect on the tool-tip position. Both the link errors (position-independent geometric error parameters) and the motion errors (position-dependent geometric error parameters) are considered. The nominal and predicted tool paths are compared and an assessment is made of the resulting surfaces with respect to the desired part profile tolerance. A methodology is also suggested to integrate this tool within a CAD/CAPP (computer aided process planning)/CAM environment.
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Sun, Hua, Hua Sun, and Yang Ding. "Research Precision CNC Machine Error Analysis Hot Weights." Applied Mechanics and Materials 687-691 (November 2014): 73–76. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.73.
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The level of industrial strength is a measure of an important indicator of a country's pillar industry level is machinery manufacturing, in modern times, the rapid development of manufacturing technology, precision and ultra-precision manufacturing technology has become an important part of modern machinery processing and manufacturing,which CNC machine tools due to its own characteristics and soon became an important part of industrial manufacture. CNC machine tool manufacturing and processing machinery as an important tool, it is an important factor affecting the accuracy of indicators work-piece machining accuracy. Therefore, improving the accuracy of CNC machine tool research has been of great concern. This paper studies CNC machine thermal geometrical analysis accuracy error rights.
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Triebe, Matthew J., Fu Zhao, and John W. Sutherland. "Development of a Cost Model for Vertical Milling Machines to Assess Impact of Lightweighting." Journal of Manufacturing and Materials Processing 5, no. 4 (2021): 129. http://dx.doi.org/10.3390/jmmp5040129.
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Lightweighting is a design strategy to reduce energy consumption through the reduction of mass of a product. Lightweighting can be applied to machine tools to reduce the amount of energy consumed during the use phase. Thus, the energy cost of machine operation will be reduced. One might also hypothesize that since a lighter-weight machine tool requires less material to build, the cost to produce such a machine will be less. However, it may also be the case that lightweighting a machine tool increases its complexity, which will likely drive up the cost to manufacture the machine. To explore the cost drivers associated with building a machine tool, data on the features associated with a wide variety of vertical milling machine tools are collected. Then, empirical cost models are fit to this data. The results from the cost models show that the machine tool mass is a significant cost driver; other key drivers are the number of axes and spindle power. The models are used to predict the cost benefits of lightweighting in terms of mass, which are compared to potential increased manufacturing costs associated with complexities introduced due to lightweighting.
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Czerech, Łukasz. "SELECTION OF OPTIMAL MACHINING STRATEGY IN THE MANUFACTURE OF ELEMENTS BOUNDED BY CURVILINEAR SURFACES." Acta Mechanica et Automatica 7, no. 1 (2013): 5–10. http://dx.doi.org/10.2478/ama-2013-0001.
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Abstract Increasing machining accuracy realized on CNC machine tools causes that the more frequently surfaces machined with this technique are not subject to further finishing processing and directly affects on the final quality of the product. Achieving geometric accuracy established by the constructor is the problem that modern technologists and CAD/CAM programmers have to faced with. The paper presents the influence of toolpath tolerance and machining strategy available in CAD/CAM software on the constituting process of technological surface layer for elements limited with curvilinear surfaces. The impact of the above mentioned parameters on the location and direction of geometrical deviations were also analyzed. Following article is part of research of the impact of selected technological parameters on the freeform surfaces geometric structure manufactured on CNC machines
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Kiss, Lotár László, and György Takács. "Additive metal printing machine tool." Design of Machines and Structures 11, no. 1 (2021): 39–45. http://dx.doi.org/10.32972/dms.2021.005.
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The 3D printing, as a modern manufacturing method, is becoming more widespread and overrides the usual industry conventions. While it was mainly known in the production of plastic parts, nowadays metal-based versions are also becoming more widespread. Reputable machine tool manufacturers such as DMG Mori or GE compete with each other to create equipment for this technology for the industry, where there is a growing market for such machines. My article seeks to answer the question of where these tools have a place in the industry, whether they can be considered as machine tools, and decide that the procedures describing the construction of machine tools could be applied to them.
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Woody, Bethany A., K. Scott Smith, Robert J. Hocken, and Jimmie A. Miller. "A Technique for Enhancing Machine Tool Accuracy by Transferring the Metrology Reference From the Machine Tool to the Workpiece." Journal of Manufacturing Science and Engineering 129, no. 3 (2006): 636–43. http://dx.doi.org/10.1115/1.2716718.
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High-speed machining (HSM) has had a large impact on the design and fabrication of aerospace parts and HSM techniques have been used to improve the quality of conventionally machined parts as well. Initially, the trend toward HSM of monolithic parts was focused on small parts, where existing machine tools have sufficient precision to machine the required features. But, as the technology continues to progress, the scale of monolithic parts has continued to grow. However, the growth of such parts has become limited by the inability of existing machines to achieve the tolerances required for assembly due to the long-range accuracy and the thermal environment of most machine tools. Increasing part size without decreasing the tolerances using existing technology requires very large and very accurate machines in a tightly controlled thermal environment. As a result, new techniques are needed to precisely and accurately manufacture large scale monolithic components. Previous work has established the fiducial calibration system (FCS), a technique, which, for the first time provides a method that allows for the accuracy of a coordinate measuring machine (CMM) to be transferred to the shop floor. This paper addresses the range of applicability of the FCS, and provides a method to answer two fundamental questions. First, given a set of machines and fiducials, how much improvement in precision of the finished part can be expected? And second, given a desired precision of the finished part, what machines and fiducials are required? The achievable improvement in precision using the FCS depends on a number of factors including, but not limited to: the type of fiducial, the probing system on the machine and CMM, the time required to make a measurement, and the frequency of measurement. In this paper, the sensitivity of the method to such items is evaluated through an uncertainty analysis, and examples are given indicating how this analysis can be used in a variety of cases.
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Wang, Shih-Ming, and Kornel F. Ehmann. "Error Model and Accuracy Analysis of a Six-DOF Stewart Platform." Journal of Manufacturing Science and Engineering 124, no. 2 (2002): 286–95. http://dx.doi.org/10.1115/1.1445148.
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Precision machining operations necessitate highly accurate, rigid, and stable machine-tool structures. In response to this need, parallel architecture machines, based on the concepts of the Stewart Platform, are emerging. In this paper, considering major inaccuracy factors related to the manufacture, geometry, and kinematics, of such machines, first and second order error models are presented, and followed by a comparative assessment of these models in conjunction with illustrative examples. Furthermore, in order to understand the character and propagation of errors of 6-DOF Stewart Platform based machine tools, sensitivity analysis is adopted to describe the contribution of each error component to the total position and orientation error of the mechanism. An automated error analysis system that computes and graphically depicts the error distributions throughout the workspace along with the results of sensitivity analysis is developed and demonstrated.
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Draghici, George. "Infrastructure for Integrated Collaborative Product Development in Distributed Environment." Applied Mechanics and Materials 760 (May 2015): 9–14. http://dx.doi.org/10.4028/www.scientific.net/amm.760.9.
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The tools used for collaborative product design is based on PLM solutions, integrating BOM, CAD, CAE, CAPP, CAM and PDM software. The PLM platforms are distributed in virtual project team of partners. Currently, the integrated collaborative and distributed product design and manufacture can be supported by the cloud technology, given advances in Cloud Computing. The objective of our research is to develop an infrastructure for integrated collaborative and distributed product design and manufacturing, including software applications, CNC machine tools, additive manufacturing machines etc., dispersed in different universities labs for students’ education.
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Nakamoto, Keiichi, and Yoshimi Takeuchi. "Recent Advances in Multiaxis Control and Multitasking Machining." International Journal of Automation Technology 11, no. 2 (2017): 140–54. http://dx.doi.org/10.20965/ijat.2017.p0140.
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This paper presents an overview of recent advances in multiaxis control and multitasking machining, the machine tools’ kinematic configurations, and the supporting and cutting technologies used for complex form shaping. The functions of the metal cutting machine tools have been expanded to meet high productivity and high accuracy requirements for machining complicated and difficult parts on a single machine. Among these functions, the increase in the number of controlled axes and the multitasking capability in one chucking process enable machine tools to manufacture complex products efficiently. The historical background and application field of machine tools are discussed, mainly by taking examples from turning- and milling-based machining. Then, research challenges to improve machining results are introduced. This paper also presents examples of the latest cutting technologies and the current status of related supporting technologies.
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Takeuchi, Yoshimi. "Special Issue on Multiaxis Control and Multitasking Machine Tools." International Journal of Automation Technology 1, no. 2 (2007): 77. http://dx.doi.org/10.20965/ijat.2007.p0077.
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Machine tools using numerical control (NC) devices are typical mechatronics products and a powerful way to automate plant production. The introduction of multiaxis control and multitasking machine tools to workshops is growing to meet the requirements of highly efficient, precision machining of a variety of complex products and mold dies. The increase in the number of control axes and multitasking capability in one chucking process enable machine tools to manufacture complex products efficiently and accurately. Given the strong attention and interest multiaxis control and multitasking machine tools are attracting, it is about time to introduce the current state of the art of these tools and their practical and applicable technologies, especially in Japan. This special issue covers the development of 5-axis control machining centers, machine tools having multispindle heads with 5-axis control, 5-axis control CAMs, accuracy evaluation for 5-axis control machine tools, and more. We thank the authors for their interesting papers to this special issue, and are certain that both general readers and specialists will find the information they provide both interesting and informative.
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Li, Jian Jun, Xi Bing Li, Jun An Liu, and Ke Xiang Wei. "Geometric Error Analysis for Millimeter-Scale Machine Tool." Advanced Materials Research 507 (April 2012): 101–5. http://dx.doi.org/10.4028/www.scientific.net/amr.507.101.
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At present, the trend of extreme product miniaturization is created. With increasing product compactness, the demand for precision miniature components is driven higher and the ability to manufacture these components accurately, swiftly and cost effectively is critical for manufacturers to maintain market competitiveness. The millimeter-scale machine tool (MMT) is on of the effective tool .This paper presents the error analysis for MMT which developed in our laboratory. The error model is developed and capability test is also implemented. The result shows that our MMT is very effective.
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Fu, Tie, Qi Xun Yu, and Si Qin Pang. "Study on Characteristics and Principium of Rare Earth Carbide Tools." Materials Science Forum 532-533 (December 2006): 101–4. http://dx.doi.org/10.4028/www.scientific.net/msf.532-533.101.
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Carbide tools play key roles in present machine manufacture. The mechanical property and cutting performance of carbide tools are improved obviously when adding micro rare earth (RE) elements into carbide tools. By means of some apparatus, such as materials testing machine, Scanning Electron Microscope (SEM), dynamometer, microscope and electron probe microanalyser, the traditional and RE carbide tools, P30 (YT5 and YT5R), P20 (YT14 and YT14R), M10 (YW1 and YW1R), K30 (YG8 and YG8R), are studied and compared by doing a lot of experiments. These experiments show that the bending strength, fracture toughness and anti-impact capability of RE carbide tools are improved remarkably, and their hardness increased a little. Moreover, the cutting force, tool-chip friction coefficient and wear of RE carbide tools decreased in cutting. In addition, the effect and cutting principium of RE element to carbide tools are analyzed and discussed, which is beneficial to the research and application of RE carbide tools.
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Březina, R., J. Filípek, and J. Šenberger. "Application of ductile iron in the manufacture of ploughshares." Research in Agricultural Engineering 50, No. 2 (2012): 75–80. http://dx.doi.org/10.17221/4930-rae.
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The service life and reliability of machines for basic soil cultivation is mainly affected by abrasive wear. The working tools of these machines are mostly made of steel. The paper deals with the possibility of manufacturing ploughshares and reversible points of austempered ductile iron (ADI). The authors examine the abrasion resistance of ADI working tools and compare it with that of the material applied by a leading world manufacturer of ploughshares. Using an appropriate mode of the heat treatment of ADI, abrasion resistance comparable to that of the original tools can be obtained.
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Axinte, Dragos. "Refreshing the scope of the International Journal of Machine Tools and Manufacture (IJMTM)." International Journal of Machine Tools and Manufacture 145 (October 2019): 103435. http://dx.doi.org/10.1016/j.ijmachtools.2019.103435.
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Duplák, Ján, Peter Michalik, Miroslav Kormoš, Slavko Jurko, Pavel Kokuľa, and Ľubomir Olexa. "Impact of Cutting Speed on the Resultant Cutting Tools Durability in Turning Process of Steel 100CrMn6." Applied Mechanics and Materials 616 (August 2014): 292–99. http://dx.doi.org/10.4028/www.scientific.net/amm.616.292.
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Durability of cutting tools represent to a large spectral index on the basis of which is characterized by functional work. Every manufacturer of cutting tools before the actual production of these tools during the development make a tests and prescribing them characteristics on which is possible then to predict their behavior in the actual production process. It might be argued, that these information are optimized and ideal and therefore the information which producers sells by these cutting tools, do not correspond completely with their real behavior. It is necessary that information by using experiments to verify and then review their informative value and correctness. Durability of cutting tools is often indicated for one tested material of marketing aspect, which is machined and effort of user is to achieve this variable for other machined materials, then is happened problem in the production. The problem is very short lifetime of cutting tool in machining process, where the effect is impossibility to optimize the machining process. The results of this action are excesses time caused by exchanged of cutting plate and then it is make a low production of machining industry by setting of machines, and then the factory has an economical loses. This article is focused on tested of cutting tools made by sintered carbide, where the machine material is steel 100CrMn6. This type of steel is used by manufacturer of bearings, therefore the experimental part of this article should be a helper for machining manufactures, which make effectively manage with tools by optimization of cutting parameters of cutting tools and thus increase their productivity and to achieve a higher profits.
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Croccolo, Dario, Massimiliano De Agostinis, Stefano Fini, Giorgio Olmi, Francesco Robusto, and Nicolò Vincenzi. "On Hirth Ring Couplings: Design Principles Including the Effect of Friction." Actuators 7, no. 4 (2018): 79. http://dx.doi.org/10.3390/act7040079.
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Rings with Hirth couplings are primarily used for the accurate positioning of axial-symmetric components in the machine tool industry and, generally, in mechanical components. It is also possible to use Hirth rings as connection tools. Specific industries with special milling and grinding machines are able to manufacture both tailor made and standard Hirth rings available on stock. Unfortunately, no international standard (for instance ISO, DIN or AGMA) is available for the production and the design of such components. In the best-case scenario, it is possible to find simplified design formulae in the catalogue of the suppliers. The aim of this work is to provide some accurate formulae and computational methods for design to provide better awareness on the limitations and the potential of this type of connection. The work consists of five parts: (i) a review of the base calculation derived mainly from the catalogues of manufacturers; (ii) an improved calculation based on a new analytical method including the friction phenomenon; (iii) an experimentation run for validating the method; (iv) a case study applied to a machine tool; and, (v) a closed form formulation to determine an upper threshold for friction, thus ensuring the Hirth coupling regular performance.
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Sałaciński, Tadeusz, Aleksander Przesmycki, and Tomasz Chmielewski. "Technological Aspects in Manufacturing of Non-Circular Gears." Applied Sciences 10, no. 10 (2020): 3420. http://dx.doi.org/10.3390/app10103420.
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The construction and manufacture of non-circular gears is one of the most difficult issues in machine technology. Due to the limited technological capabilities of traditional machines and tools, past manufacturing methods were unable to calculate the assumed shape of the tooth line and its profile. Modern manufacturing methods using computer numerical control allow for the generation of non-circular gears with free-form tooth profiles and curvilinear teeth in their lengthwise direction. These methods are also used to manufacture internal gears. This article provides a review of the methods of machining non-circular gears and presents the results of the research on the Fellows method using a shaper cutter, as well as the wire electrical discharge machining method.
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Alyoshin, A. N., and O. A. Lavrentjeva. "ME TALWORKING AND EMO HANNOVER 2019 – THE T WO PILL ARS OF THE WORLD MACHINET O OL INDUS T RY AN INTERVIEW WITH DR. WILFRIED SCHÄFER , E X EC U TI V E DIRECTOR OF GERMAN MACHINE TOOL BUILDERS’ ASSOCI AT ION VDW (VEREIN DEU TS CHER WERK Z EUGMA SCHINENFABR IK EN)." STANKOINSTRUMENT Russia 16, no. 3 (2019): 32–35. http://dx.doi.org/10.22184/2499-9407.2019.16.3.32.35.
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According to the prognosis of Oxford Economics, a British Institute of Economic Researches, the world economy in the beginning of the year will rise by 2.5%. The growth of investments in the manufacture will be 2,4%. According to the spring prognosis the growth of consumption of machine tools will become 2,3%. This is the background for the exhibition in Russia “Metalloobrabotka – 2019” and “EMO Hannover 2019” in Germany. Will these two pillars of the world machine tool industry become the drivers of the growth and warm up the world economy?
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Tian, Li Zhong. "Manufacture of Nuzzles Integrated with Saddle Pad." Advanced Materials Research 756-759 (September 2013): 4322–25. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.4322.
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Nuzzles on fatigue or high pressure container are all combined with saddle pad, the joint between the shell and the nozzle is welding neck, which is better than any other kind joint, but the interface of nozzle and the shell is a 3D face, which is impossible to be formed by ordinary machine tools. In this paper, established mathematics model, analyzed the relation of mathematics, compiled NC program, and realized the numerical controlled processing on machining center, the error of process are also considered.
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Cao, L. X., H. J. Wu, and J. Liu. "Kinematic Analysis of Face Grinding Process at Lapping Machines." Key Engineering Materials 291-292 (August 2005): 145–50. http://dx.doi.org/10.4028/www.scientific.net/kem.291-292.145.
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The precise face grinding and lapping technology with abrasive or abrasive tool has been widely used in the field of the precise manufacture and ultraprecise manufacture. It has become an essential technology in the manufacture of many components. The planetary lapping machine is typical equipment for face grinding or lapping process. And the relative motions between the workpieces and grinding wheel will affect the formation of wear profiles of the tools, furthermore, the work result will be affected directly by the cutting path of this relative motions. In this paper, the kinematic principle of face grinding process on lapping machines has been analyzed. By means of the concept of pitch point and pitch circles, the complicated grinding process has been converted into two kinds of rotations with the fixed center distance. Two kinds of path curves, i.e. workpiece against grinding wheel and grinding wheel against workpiece, and their relations are analyzed. The geometrical analyses and the manufacture quality of the workpiece are linked with the aid of the cutting velocity, the range of the rotational angle of the cutting traces and the rate of the change of the rotational angle with time. The optimal path curve and kinematic parameters are achieved, and these results are corresponding to the experimental results.
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Ji Chan, Yum. "Improvements to Linear and Nonlinear Models of Machine Key Components." Impact 2021, no. 1 (2021): 15–17. http://dx.doi.org/10.21820/23987073.2021.1.15.
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Precision machinery has come a long way over the years. Factories that once relied on manpower now use machines, and this development has brought with it innumerable benefits including improvements to accuracy, repeatability, productivity and efficiency. Naturally, though, machines are imperfect in that precision of a batch of machines vary slightly. On top of that, machines experience wear and tear or even break-downs. These unpredictable events can be costly to manufacturers. This is why research to better understand factors that affect a machine's precision is important. This knowledge can be used to reduce the issues that occur with machine tools and thereby maximise the efficiency and quality of production. This is the goal of Dr Yum-Ji Chan, Department of Mechanical Engineering, National Chung Hsing University, Taiwan. His research on vibration engineering, structural dynamics and the dynamics of rotors is seeking to better understand machine tools and, in doing so, improve their performance. He believes more research is required to understand the behaviour of specific components in machine tools, and he is seeking to fill this gap in knowledge. This involves understanding the vibration phenomena that occur in components in machine tools and, to do so, Chan and his team are producing accurate dynamic behaviour in machine tool models. This will, in turn, enable researchers to develop virtual machine tools that can monitor the condition of machines.