Journal articles: 'Turning machine'

1

NAKAO, Yohichi, and Yuji SAGESAKA. "Water Drive Spindle for Diamond Turning Machine(Advanced machine tool)." Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2005.2 (2005): 449–54. http://dx.doi.org/10.1299/jsmelem.2005.2.449.

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Zhou, Feng-Quan, Mark A. Walzer, and William D. Snider. "Turning On the Machine." Neuron 43, no. 1 (July 2004): 1–2. http://dx.doi.org/10.1016/j.neuron.2004.06.020.

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Nakanishi, Kenichi, Manabu Sawada, and Jiro Sakamoto. "A Newly Developed Multi-Axis Controlled Turning Machine Equipped with a Swing Type Turret Head." International Journal of Automation Technology 9, no. 6 (November 5, 2015): 707–13. http://dx.doi.org/10.20965/ijat.2015.p0707.

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In order to improve the productivity and flexibility of the conventional turning machines, multi-tasking turning machines are developed to simultaneously perform several machining operations. In this study, a multi-axis controlled turning machine equipped with a swing-type B-axis turret head is developed that allows multiple turning processes to be performed. In particular, the structural design of the turret head is discussed in detail.

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Stránský, Marek, and Jaroslav Horský. "Determination of Turning Knife Thermal Stress during Longitudinal Turning." Applied Mechanics and Materials 821 (January 2016): 649–54. http://dx.doi.org/10.4028/www.scientific.net/amm.821.649.

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A turning knife contacts a work piece during turning. Due to friction, heat is produced proportionally to the turning speed. The resulting temperature influences the quality of the machined surface and wear of the knife. Thus, new machine tools must be developed that minimize the production of unwanted heat. To accomplish this task, a new experimental knife was prepared with thermocouples both built into it and welded to its surface. The measurement process was supplemented by thermovision. Heat flux and surface temperatures were computed from subsurface data using a one-dimensional inverse relationship. The detailed temperature distribution on the surface of the turning knife was determined using a combination of these methods.

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Mares, M., and O. Horejs. "ENHANCEMENT OF SPECIALISED VERTICAL TURNING LATHE ACCURACY THROUGH MINIMISATION OF THERMAL ERRORS DEPENDING ON TURNING AND MILLING OPERATIONS." MM Science Journal 2021, no. 3 (June 30, 2021): 4512–18. http://dx.doi.org/10.17973/mmsj.2021_7_2021053.

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Achieving high workpiece accuracy is a long-term goal of machine tool designers. There are many causes of workpiece inaccuracy, with thermal errors being the most dominant. Indirect compensation (using predictive models) is a promising strategy for reducing thermal errors without increasing machine tool cost. A modelling approach using thermal transfer functions (a dynamic method with a physical basis) embodies the potential to deal with this issue. The method does not require interventions into the machine tool structure, uses a minimum of additional gauges and its modelling and calculation speed is suitable for real-time applications with fine results with up to 80% thermal error reduction. Advanced machine tool thermal error compensation models have been successfully applied on various kinds of single-purpose machines (milling, turning, floor-type, etc.) and implemented directly into their control systems. This research reflects modern trends in machine tool usage and as such is focused on the applicability of the modelling approach to describe specialised vertical turning lathe versatility. The specialised vertical turning lathe is adequately capable of carrying out turning and milling operations. Calibration of the reliable compensation model is a real challenge. The applicability of the approach during immediate switching between turning and milling operations is discussed in more detail.

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Zou, Xicong, Xuesen Zhao, Guo Li, Zengqiang Li, Zhenjiang Hu, and Tao Sun. "An on-machine error compensation method for an ultra-precision turning machine." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 233, no. 5 (September 13, 2017): 1608–13. http://dx.doi.org/10.1177/0954405417731471.

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On-machine error compensation (OMEC) is efficient at improving machining accuracy without increasing extra manufacturing cost, and involves the on-machine measurement (OMM) of machining accuracy and modification of program code based on the measurement results. As an excellent OMM technique, chromatic confocal sensing allows for the rapid development of accurate and reliable error compensation technique. The present study integrated a non-contact chromatic confocal probe into an ultra-precision machine for OMM and OMEC of machined components. First, the configuration and effectiveness of the OMM system were briefly described, and the relevant OMEC method was presented. With the OMM result, error compensation software was then developed to automatically generate a modified program code for error compensation. Finally, a series of cutting experiments were performed to verify the validity of the proposed OMEC method. The experimental results demonstrate that the proposed error compensation method is reliable and considerably improves the form error of machined components.

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7

Mareš, Martin, Otakar Horejš, and Jan Hornych. "Thermal Error Minimization of a Turning-Milling Center with Respect to its Multi-Functionality." International Journal of Automation Technology 14, no. 3 (May 5, 2020): 475–83. http://dx.doi.org/10.20965/ijat.2020.p0475.

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Achieving high workpiece accuracy is a long-term goal of machine tool designers. Many causes can explain workpiece inaccuracy, with thermal errors being the most dominant. Indirect compensation (using predictive models) is a promising thermal error reduction strategy that does not increase machine tool costs. A modeling approach using transfer functions (i.e., a dynamic method with a physical basis) has the potential to deal with this issue. The method does not require any intervention into the machine tool structure, uses a minimum of additional gauges, and its modeling and calculation speed are suitable for real-time applications that result in as much as 80% thermal error reduction. Compensation models for machine tool thermal errors using transfer functions have been successfully applied to various kinds of single-purpose machines (milling, turning, floor-type, etc.) and have been implemented directly into their control systems. The aim of this research is to describe modern trends in machine tool usage and focuses on the applicability of the modeling approach to describe the multi-functionality of a turning-milling center. A turning-milling center is capable of adequately handling turning, milling, and boring operations. Calibrating a reliable compensation model is a real challenge. Options for reducing modeling and calibration time, an approach to include machine tool multi-functionality in the model structure, model transferability between different machines of the same type, and model verification out of the calibration range are discussed in greater detail.

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SUGI, Tadashi, Hiroshi KUWAHARA, Norio KAINUMA, and Mituo HARADA. "Development of sharp turning shield machine." Doboku Gakkai Ronbunshu, no. 435 (1991): 29–33. http://dx.doi.org/10.2208/jscej.1991.435_29.

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9

Lim, G. H. "Tool-wear monitoring in machine turning." Journal of Materials Processing Technology 51, no. 1-4 (April 1995): 25–36. http://dx.doi.org/10.1016/0924-0136(94)01354-4.

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Bondarenko, L. I., and V. T. Soziev. "Ultrasonic finish turning of machine rolls." Chemical and Petroleum Engineering 23, no. 9 (September 1987): 455–59. http://dx.doi.org/10.1007/bf01150001.

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11

Chan, Sunny, Sammy Wong, Tom C. Kong, and Ru Du. "Development of a Millimeter Scale Turning Centre for Gear Hobbing." Key Engineering Materials 364-366 (December 2007): 249–53. http://dx.doi.org/10.4028/www.scientific.net/kem.364-366.249.

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Conventional machining is generally preferred in manufacturing metal components with 2½D features and/or 3D silhouettes. With the ever increasing demand for reduced sizes and increased accuracy, however, traditional machine tools have become ineffective for cutting miniature components. A typical example is gear manufacturing. It is known that gears are machined using the gear hobbing process in which the cutter axis and the workpiece axis are required to be synchronized to an accurate constant ratio. According to a market survey, only a few machine tools can make gears with the size of φ1.0 mm. This paper presents our effort in developing a PC-based millimeter scale CNC turning centre with gear hobbing capability to machine miniature gears. In this machine, the synchronization required by the gear hobbing process was achieved directly by controlling the AC servomotors. Experiment results show that the machine is able to machine high quality components with diameter as small as 0.075 mm and hob gears with module as small as 0.09.

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SHIBATA, Toru, and Toru MIYASAKA. "Development of page turning roller for high reliable page turning machine." Transactions of the JSME (in Japanese) 84, no. 860 (2018): 17–00448. http://dx.doi.org/10.1299/transjsme.17-00448.

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SHIBATA, Toru, and Toru MIYASAKA. "Study on Page Turning Machine for High Reliable Page Turning Process." Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP 2016 (2016): D—1–2. http://dx.doi.org/10.1299/jsmeiip.2016.d-1-2.

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14

Rahman, M. A., Nur Atiqah Md Sadan, Mohammad Minhat, Halim Isa, and Abu Bakar Baharudin. "Investigation of Cutting Parameter and Machine Tool Vibration Effects Using Regression Analysis to Enhance Part Dimensional Accuracy." Applied Mechanics and Materials 761 (May 2015): 93–97. http://dx.doi.org/10.4028/www.scientific.net/amm.761.93.

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Dimensional accuracy plays important criteria in producing high quality machined parts. This is a big challenge to manufacturers of precision components to produce good quality parts with minimum manufacturing error. The focus of this paper is to study the influence of the machine tool rigidity and cutting parameters on dimensional accuracy in turning operation. A method was prepared for identifying the factors effecting dimensional accuracy in a turning process. Experimental setup involved computerized numerical control (CNC) lathe machine, with VBMT 160404 carbide insert and mild steel, as cutting tool and workpiece respectively. The statistical analysis was used for analyzing and determining the accuracy of experimental data through Minitab statistical software. The regressions model was developed. The developed regression model could be used to predict the dimensional precision of the parts based on machine tool vibration and machining parameters during turning process. This is the aspect to be seriously considered and be applied in attaining sustainable machine tool development during design and development stage and its usage. This finding provides useful guidelines for manufacturers to produce high quality machined parts at minimum manufacturing cost. It was found that the cutting speed, feed rate, final part length, vibration x and vibration z have significant effects on dimensional accuracy of the machined parts.

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OKA, Raiyo, and Koichi MORISHIGE. "A024 Development of Operation Interface for Turning Machine Using Haptic Device." Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2013.7 (2013): 107–10. http://dx.doi.org/10.1299/jsmelem.2013.7.107.

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Sukharev, R. Yu. "Mathematical models of wheel turning processes road construction vehicles." Nauchno-tekhnicheskiy vestnik Bryanskogo gosudarstvennogo universiteta 7, no. 3 (September 25, 2021): 259–69. http://dx.doi.org/10.22281/2413-9920-2021-07-03-259-269.

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The construction of highways is a complex, multi-stage process. Most of the construction works are carried out according to the projects of structures and quite high requirements are imposed on the quality of execution. The fulfillment of these requirements is associated with great difficulties in view of the limited accuracy of the road construction machine itself, the lack of on-board control systems and the limited capabilities of the human operator, who is unable to determine the required exact parameters of the structure being built «by eye». To meet the requirements, three-dimensional control systems are used, which allow determining 3 coordinates of the working order of the machine – the vertical coordinate and the location of the machine on the construction site. At the same time, the digital project of the constructed structure should be the setter in such a system. The system determines the current position and compares it with the project. On the basis of this information, a control effect on the operating organ of the machine is formed. The course of movement and the speed of the machine when using such systems are determined by the machine operator. Further development of these systems should be four-dimensional systems – in which all control actions are assigned to the control system, starting from calculating the trajectory of the machine, choosing the speed, determining the required number of passes and ending with controlling the position of the working body of the machine at each moment of time. For the functioning of these systems, adequate mathematical models of the turning processes of road construction machines with different steering options are necessary.

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Lee, W. B., C. F. Cheung, J. G. Li, S. To, J. J. Du, and Z. Q. Yin. "Development of a virtual machining and inspection system for ultra-precision diamond turning." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 221, no. 7 (July 1, 2007): 1153–74. http://dx.doi.org/10.1243/09544054jem491.

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The conventional approach to establish optimal processing conditions in ultraprecision diamond turning is empirical in nature. The achievement of a super mirror finish and submicrometre form accuracy in many current industrial applications still depends much on the experience and skills of the machine operators through trial cutting tests when new materials or new machine tools are used. In this paper, a virtual machining and inspection system (VMIS) is presented for ultra-precision diamond turning. The development of the VMIS aims at creating a virtual manufacturing environment for the optimization of process parameters and evaluating the quality of machined surface through various modelbased simulation modules. The VMIS is validated through a series of practical cutting tests conducted on a two-axis computer numerical control ultra-precision turning machine. The experimental results agree well with the simulated data.

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Gupta, Navriti, A. K. Agrawal,, R. S. Walia, and Ranganath Singari. "Hard Turning of AISI D2 Steel In CNC Machining: An Overview." INTERNATIONAL JOURNAL OF ADVANCED PRODUCTION AND INDUSTRIAL ENGINEERING 3, no. 1 (January 25, 2018): 17–20. http://dx.doi.org/10.35121/ijapie201801125.

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D2 steel is an industrial tool steel. It is widely used in the tool and die industry for making cutting tool inserts, bending inserts, restriking inserts, etc. which can be taken out after their tool life. D2 steel is a very tough steel and difficult to machine also. High generations tool bits like Tungsten carbides and Titanium carbides are required to machine them. The heat treatment follows the machining process. Their machinability is very low. CNC machines are often used to finish them. Often they are machined using programs on UG-NX Uni Graphics(CAM) and DELCAM. And they have to be machined in three steps. Roughing operations, followed by Semi-Finish machining and the last step is finish machining.CNC machining centers are versatile in their applications in metal removal processes. Often they are so modernized that just like many manufacturing operations, metal removal can be automated too. The need for CNC machining arises due to extensive finishing requirements in the aerospace, automotive industries. However, the CNC or Computer and Numerically controlled machining process usage is not limited to these industries only. Tool and Die industry also is heavily dependent on CNC material removal and machining processes as now replaceable inserts are widely used in this industry.

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Chethan, Y. D., H. V. Ravindra, and Y. T. Krishne gowda. "Machined Surface Monitoring in Turning Using Histogram Analysis by Machine Vision." Materials Today: Proceedings 5, no. 2 (2018): 7775–81. http://dx.doi.org/10.1016/j.matpr.2017.11.455.

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Guan, Shang Jun, and Ke Yang. "The no Alarm Faults Examples for Maintenance on a Combining CNC Machine Tool of Turning and Grinding." Key Engineering Materials 561 (July 2013): 626–29. http://dx.doi.org/10.4028/www.scientific.net/kem.561.626.

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Our self-developed a combining CNC machine tool of turning and grinding uses modular structure，easy to operate and easy to service，so it has been widely applied. For the most part, there will be alarms when the combining CNC machine tool of turning and grinding has faults, but sometimes there may be no alarm. This paper briefly presents the no alarm faults examples and its resolutions for a combining CNC (Computer Numerical Control) machine tool of turning and grinding, which provides an important basis for technicians to operate and maintain the Combining CNC machine tool of turning and grinding.

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Cunningham, Michael. "Slave to the Machine: Turning the Tables." Circa, no. 102 (2002): 15. http://dx.doi.org/10.2307/25563868.

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Li, J. T., X. Ch Xu, and B. L. Zhang. "Feed Servo Control for Ultraprecision Turning Machine." CIRP Annals 40, no. 1 (1991): 567–70. http://dx.doi.org/10.1016/s0007-8506(07)62055-1.

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INOUE, Katsumi, and Tomoya MASUYAMA. "Automatic Page Turning Machine for Various Books." Journal of the Society of Mechanical Engineers 108, no. 1044 (2005): 869–71. http://dx.doi.org/10.1299/jsmemag.108.1044_869.

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Zhang, Chang-De, and Shin-Min Song. "Turning gaits of a quadrupedal walking machine." Advanced Robotics 7, no. 2 (January 1992): 121–57. http://dx.doi.org/10.1163/156855393x00087.

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Kumar, Pardeep, S. R. Chauhan, and Aman Aggarwal. "Hard turning and machine tool: a review." International Journal of Manufacturing Technology and Management 29, no. 3/4 (2015): 252. http://dx.doi.org/10.1504/ijmtm.2015.069258.

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Feng, Jin Chun, You De Wu, Chao Zhu, Lin Jian Yang, and Lei Li. "Research on the Efficient Cylinder Cutting on CNC Boring Machine Combining with Self-Made Welding Cutter." Applied Mechanics and Materials 34-35 (October 2010): 743–46. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.743.

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Because of the combination of self-made or common boring bar and CNC program, we machined two external cylinders used for tightening ring (φ500u6(+0.58/+0.54)×130mm ) of a vertical roller mill, and conquered the difficulty on machining high-precision cylindrical on the boring machine. This process improvement not only brings the machining advantage of CNC machine tools into full play, but also organically integrates conventional boring to turning methods, which can cause high machining efficiency. Since the special tooling is not needed and it’s easy to obtain materials from local sources, we can adjust the process in a large range. The implementation of this processing method is meaningful for the reference and promotion of processing such short cylinder by turning on the boring machine.

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Sun, Wei-Heng, and Syh-Shiuh Yeh. "Using the Machine Vision Method to Develop an On-machine Insert Condition Monitoring System for Computer Numerical Control Turning Machine Tools." Materials 11, no. 10 (October 14, 2018): 1977. http://dx.doi.org/10.3390/ma11101977.

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This study uses the machine vision method to develop an on-machine turning tool insert condition monitoring system for tool condition monitoring in the cutting processes of computer numerical control (CNC) machines. The system can identify four external turning tool insert conditions, namely fracture, built-up edge (BUE), chipping, and flank wear. This study also designs a visual inspection system for the tip of an insert using the surrounding light source and fill-light, which can be mounted on the turning machine tool, to overcome the environmental effect on the captured insert image for subsequent image processing. During image capture, the intensity of the light source changes to ensure that the test insert has appropriate surface and tip features. This study implements outer profile construction, insert status region capture, insert wear region judgment, and calculation to monitor and classify insert conditions. The insert image is then trimmed according to the vertical flank, horizontal blade, and vertical blade lines. The image of the insert-wear region is captured to monitor flank or chipping wear using grayscale value histogram. The amount of wear is calculated using the wear region image as the evaluation index to judge normal wear or over-wear conditions. On-machine insert condition monitoring is tested to confirm that the proposed system can judge insert fracture, BUE, chipping, and wear. The results demonstrate that the standard deviation of the chipping and amount of wear accounts for 0.67% and 0.62%, of the average value, respectively, thus confirming the stability of system operation.

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Sutopo, Sutopo, Bayu Rahmat Setiadi, and Muhammad Hanzla. "Upgrading Manual Turning Machine Towards IoT-Based Manufacturing." Jurnal Pendidikan Teknologi dan Kejuruan 26, no. 2 (September 25, 2020): 155–61. http://dx.doi.org/10.21831/jptk.v26i2.27334.

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Technological independence is one aspect of the challenges of the industrial revolution era 4.0. Digitalization, robotization, big data, internet of things (IoT), and efficiency of work processes require an update in technology. If everything is held in the fulfillment of practicum facilities, it will undoubtedly cost a prohibitive fee. Many of the tools and machines found in learning machining practices in Vocational High Schools (VHS) in Indonesia are still a conventional machine. This study provides a breakthrough solution in the effectiveness and efficiency of traditional machining of the lathe that starts with a preliminary identification of literature, selection according to inclusion and exclusion criteria, coding, themes classifications, and supplementary areas. Through the literature review methodology, this article has the main objective of identifying the needs in architecture and the need for supporting devices on conventional lathes based on the IoT as well as safe, comfortable, and modern work areas in lathe machining practices.

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KIEW, CHAI LIP, AKSHAYEN BRAHMANANDA, KH TAUHID ISLAM, HAO NAM LEE, SAMUEL ANTHONY VENIER, ASHIR SARAAR, and HAMIDREZA NAMAZI. "ANALYSIS OF THE RELATION BETWEEN FRACTAL STRUCTURES OF MACHINED SURFACE AND MACHINE VIBRATION SIGNAL IN TURNING OPERATION." Fractals 28, no. 01 (February 2020): 2050019. http://dx.doi.org/10.1142/s0218348x2050019x.

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Investigating about the machined surface is an important issue in every machining operation. One of the factors that affect the quality of machined surface is the vibration of machine that is caused by different parameters such as the spindle speed. Therefore, the analysis of the relation between the machine vibration and surface quality of machined surface is very important. In this research, we analyze the relation between the machined surface and machine vibration from the complexity point of view. For this purpose, we employ fractal analysis. We investigate the variations of fractal structure of vibration signal collected from lathe machine versus the variations of fractal structure of the machined surface, for different depths of cut, feed rates and spindle speeds. Based on the obtained results, the variations of fractal structures of machined surface and vibration signal show a similar trend with the variations of depth of cut and feed rate, where by the increment of depth of cut and feed rate, vibration signal and machined surface get more complex. However, the obtained results in the case of variation of spindle speed do not show a consistent trend between variations of fractal structures of vibration signal and machined workpiece. The obtained method in this research can be applied to other machining operations in order to analyze the relation between the complexities of machine vibration and machined surface.

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Denkena, Berend, Benjamin Bergmann, and Matthias Witt. "Feeling Machine for Process Monitoring of Turning Hybrid Solid Components." Metals 10, no. 7 (July 10, 2020): 930. http://dx.doi.org/10.3390/met10070930.

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The realization of the increasing automation of production systems requires the guarantee of process security as well as the resulting workpiece quality. For this purpose, monitoring systems are used, which monitor the machining based on machine control signals and external sensors. These systems are challenged by innovative design concepts such as hybrid components made of different materials, which lead to new disturbance variables in the process. Therefore, it is important to obtain as much process information as possible in order to achieve a robust and sensitive evaluation of the machining. Feeling machines with force sensing capabilities represent a promising approach to assist the monitoring. This paper provides, for the first time, an overview of the suitability of the feeling machine for process monitoring during turning operations. The process faults tool breakage, tool wear, and the variation of the material transition position of hybrid shafts that were researched and compared with a force dynamometer. For the investigation, longitudinal turning processes with shafts made of EN AW-6082 and 20MnCr5 were carried out. The results show the feeling machine is sensitive to all kinds of examined errors and can compete with a force dynamometer, especially for roughing operations.

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Kaldashev, Tsvetan. "VERICUT - CONFIGURING CNC SYSTEMS FOR TURNING CENTER WITH SUB-SPINDLE." ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (June 16, 2021): 134–36. http://dx.doi.org/10.17770/etr2021vol3.6544.

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This report discusses the configuration of some preparatory and auxiliary commands for the Fanuc 18i TB CNC system for a counter-spindle lathe using special macros called Vericut macros. In most cases, this is necessary because the Vericut library of machines and CNC systems does not have the specific machine and system or do not correspond to the actual ones, i. e. there is no match between them. The need to configure the CNC control system is related to the fact that it is possible to perform simulation, optimization and verification of control programs in a virtual environment before proceeding to the processing of workpieces on the real machine.

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Zhang, Hui, and Yan Chen. "Principle Analysis of Profiled Bar Turning Peeling Machine." Applied Mechanics and Materials 457-458 (October 2013): 486–89. http://dx.doi.org/10.4028/www.scientific.net/amm.457-458.486.

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Through the study of regular polygon cross section continuous forming processing technology of rotary cutting machine, this article designed a profiled bar turning peeling machine. This machine is mainly composed of workpiece axis, cutter axis, feed device and pulling device, etc . Parallel mounted, workpiece axis and cutter axis rotate at a rotational speed ratio in the same direction so as to form complex turning motions, during which the cutting track of the knifepoint relative to workpiece axis forms a shape of approximate linear closed curve, at the same time, feed device and pulling device pull workpiece moving along the axis, through which this machine can complete a turning finish of a whole workpiece at a time. This article analyzed the turning peeling principle of profiled bar, established a motion trajectory equation for the knifepoint relative to the workpiece axis, analyzed the processing straightness error of turned profiled bar, and then derived the error calculation formula.

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Lisiak, Paweł, Izabela Rojek, and Paweł Twardowski. "Evaluating the Reliability of Groove Turning for Piston Rings in Combustion Engines with the Use of Neural Networks." Archives of Mechanical Technology and Materials 37, no. 1 (January 26, 2017): 35–40. http://dx.doi.org/10.1515/amtm-2017-0005.

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AbstractThe article describes a method of evaluating the reliability of groove turning for piston rings in combustion engines. Parameters representing the roughness of a machined surface, Ra and Rz, were selected for use in evaluation. At present, evaluation of surface roughness is performed manually by operators and recorded on measurement sheets. The authors studied a method for evaluation of the surface roughness parameters Ra and Rz using multi-layered perceptron with error back-propagation (MLP) and Kohonen neural networks. Many neural network models were developed, and the best of them were chosen on the basis of the effectiveness of measurement evaluation. Experiments were carried out on real data from a production company, obtained from several machine tools. In this way it becomes possible to assess machines in terms of the reliability evaluation of turning.

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Larsen, G., and S. Cetinkunt. "Low Speed Motion Control Experiments on a Single Point Diamond Turning Machine Using CMAC Learning Control Algorithm." Journal of Dynamic Systems, Measurement, and Control 119, no. 4 (December 1, 1997): 775–81. http://dx.doi.org/10.1115/1.2802390.

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Diamond turning of brittle materials such as glass, ceramic, germanium, and zinc sulfide has been of considerable research interest in recent years due to applications in optics and precision engineering systems. When diamond turning brittle materials, material removal should be kept within the ductile regime to avoid subsurface damage (Evans, 1991; Nakasuji et al., 1990). It is generally accepted that ductile regime machining of brittle materials can be accomplished using extremely low depth of cut and feed rates. Furthermore, the tool positioning accuracy of the machine must be in the nanometer range to obtain optical quality machined parts with surface finish and profile accuracy on the order of 10 nm and 100 nm respectively (Nakasuji et al, 1990, Ueda et al., 1991). Nanometric level positioning accuracy of the machine tool axes is difficult particularly at low feed rates due to friction and backlash. Friction at extremely low feed rates is highly nonlinear due to the transition from stiction to Coulomb friction, and as such is very difficult to model. Standard proportional-integral-derivative (PID) type controllers are unable to deal with this large and erratic friction within the requirements of ultra precision machining. In order to compensate the effects of friction in the machine tool axes, a learning controller based on the Cerebellar Model Articulation Controller (CMAC) neural network is studied for servo-control. The learning controller was implemented using “C” language on a DSP based controller for a single point diamond turning machine. The CMAC servo control algorithm improved the positioning accuracy of the single point diamond turning machine by a factor of 10 compared to the standard PID algorithm run on the same machine and control system hardware.

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Bidgoli, Hassan Sharifi, and Ramezan Ali Mahdavinejad. "Vibration Effects on Tailstock of a Turning Machine." Advanced Materials Research 118-120 (June 2010): 876–80. http://dx.doi.org/10.4028/www.scientific.net/amr.118-120.876.

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Machine tools as a main device in manufacturing and production lines are widely used nearly in all branches of industries. Precision continuation of these systems with times and against inspected shocks is necessary and very important. Turning as a main kind and high usage machine tool is used in many industrial parts production, especially those with rounded sections. Spindle, tailstock and bed in machine tools play engraving role in dimensional accuracy. In this paper the vibration effects on the tailstock of a turning machine during its operation, is analyzed. For this purpose, a LZ330 VS machine from Weiler Co. in Germany is modeled with Solid Works software. This model with IGES format is transferred to ANSYS 5.4 analytical software. In this area, the model is analyzed via modal and transient dynamic analysis. The results show that, the more tailstock’s sleeve length, the less critical frequency amount.

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Koga, Fumio, Shinichi Ninomiya, and Kiyoshi Suzuki. "Spin Turning of Hardened Steel Using a Rod Tool Made of Cemented Carbide and On-Machine Forming of Rod Tool." Materials Science Forum 874 (October 2016): 505–10. http://dx.doi.org/10.4028/www.scientific.net/msf.874.505.

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Use of a tool driven by a spin turning method on a 5 axis turning center has an advantage in suppressing a tool wear in the external turning of hard-to-machine materials. However, it is important not easy to control a radial runout of the tool periphery in the spin turning. In this research, a simple rod shaped tungsten carbide was applied as a rotating tool to the turning of a hardened steel workpiece (HRC63). In addition, on-machine grinding method was proposed as a measure to minimize a radial runout of the rotating tool. With this technique, a well suited rake angle, relief angle or chip breaker profile could be easily given to the tool. In spin turning of the hardened steel with a WC rod tool, roughness value of the worked surface was reduced and tool wear was suppressed in comparison with the turning without tool rotation. In addition, it was shown that correction of the tool runout and forming of the tool rake face could be done on the machine.

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Fledrich, G., I. Pálinkás, and R. Keresztes. "Turning ZrO2 ceramics." International Review of Applied Sciences and Engineering 1, no. 1-2 (December 1, 2010): 3–6. http://dx.doi.org/10.1556/irase.1.2010.1-2.1.

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Abstract In place of brittle ceramics used so far have appeared up-to-date so-called tough ceramic materials resisting better against mechanical effects [1]. Such material is the zirconium-dioxide, too. The important advantage of hard-turning is the applicability of universal tool. Various outlines can be formed by a tool given. Machining ceramics in case of using traditional machining (turning, milling, drilling) requires special technological conditions (tools, machine-tools, technological parameters, etc.) [2] which are developing presently. We would like extending our research work in this course, too.

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Rassenfoss, Stephen. "Turning a Scientific Tool Into an Engineering Machine." Journal of Petroleum Technology 65, no. 04 (April 1, 2013): 48–53. http://dx.doi.org/10.2118/0413-0048-jpt.

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Adler, Jeffrey S., and Edward K. Spann. "Turning the Machine into a Horn of Plenty." Reviews in American History 21, no. 4 (December 1993): 634. http://dx.doi.org/10.2307/2703405.

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Kong, Qingkai, Daniel T. Trugman, Zachary E. Ross, Michael J. Bianco, Brendan J. Meade, and Peter Gerstoft. "Machine Learning in Seismology: Turning Data into Insights." Seismological Research Letters 90, no. 1 (November 14, 2018): 3–14. http://dx.doi.org/10.1785/0220180259.

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ARTHAYA, BAGUS, ARI SETIAWAN, and SANTOSO SUNARDI. "THE DESIGN AND DEVELOPMENT OF G-CODE CHECKER AND CUTTING SIMULATOR FOR CNC TURNING." Journal of Advanced Manufacturing Systems 10, no. 02 (December 2011): 261–76. http://dx.doi.org/10.1142/s0219686711002193.

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CNC machines have become popular in the manufacturing sector in the last three decades. It is still expensive to afford all aspects related to the operations of these machines. One important aspect is the programming stage, which requires a skilful programmer and an appropriate programming media. Hiring a good programmer is not the cheap and the best solution, while having a commercial programming media is also not affordable for SME in Indonesia. This research is focusing on the design and development of a program checker to see whether the program for a CNC turning machine is correct and ready to be fed to the machine. At once, this program is also capable of displaying cutting simulation of how the product is to be cut in the machine. Therefore, this program will help a small manufacturing company to avoid hiring an expensive expert or buying special programming media. This program is specifically developed for a CNC Okuma Howa ACT 3 turning machine. Some results show that the program can easily point out error location if there is a logical or syntax error in the NC program. Moreover, the simulation can be executed only if all errors have been corrected. This feature ensures that the simulation can run properly. To run the simulation, one has to set up some variables such as workpiece dimension, tool position with respect to the machine, and cutter dimension.

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Liu, Ri Liang, and Hai Guang Zhu. "A STEP Compliant Framework for Cutting Force Prediction for NC Turning Operations." Advanced Materials Research 889-890 (February 2014): 1009–13. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.1009.

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With STEP-NC (ISO 14649) being gradually accepted as new standard for programming computerized numerical control (CNC) machine tools, new technologies and computer systems in the design and manufacturing process chain are emerging, and conventional systems are reshaping, to support interoperable and intelligent manufacturing. This paper addresses issues and solutions for the adaptation. In the first place, a strategy for adapting legacy CNC turning machine tools to the emerging standard is presented. In the second place, the new data model is analyzed and a practical way to retrieve and extract manufacturing information from the STEP-NC part program for turning process is presented. In the third place a workable approach to calculating the cutting force and chip load in turning operations is presented based on the mechanistic modeling method. Finally the proposed approach is implemented in a prototype system and tested with an example STEP-NC program for turning, which shows not only the feasibility of the proposed approach for information extraction and process evaluation, but also the possibility of using simple transitional systems to bridge the gap between the sophisticated STEP-NC part program and conventional CNC machines.

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Ma, Ting Hui. "A Height Adjustable Tool Holder." Applied Mechanics and Materials 496-500 (January 2014): 873–76. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.873.

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In ordinary lathe turning workpiece before, must first adjust the turning tool nose aim at spindle centre. But in the real machining cutter bar itself due to different specifications, you need to add the shims in the cutter bar below to adjust the height to meet the lathe tool nose alignment chuck center. But this traditional method often turning tool itself reduced rigidity, affected by the roughness of the machined surface, in order to solve this problem, this paper will newly design to reasonable of turning tool holder, make the turning tool holder height according to the requirements of the upper and lower adjustment, solve the insufficient rigidity of turning tool, workpiece surface roughness difference, eating tool, tooth type angle is not accurate and other issues, the following discussion is made on the structure design. Context Development is important, on the basis of ensuring processing quality, improve productivity, existing equipment, is now as the industry is the rapid development of China's urgent need to solve the problem, in order to make a country really strong, must be developed industrial base, in the machining of this big family, Especially ordinary lathe, but a high quality processing lathe and process parameters is the total goal of development of manufacturing industry. As the machine tool operator is the first to consider how to improve the existing machine, the machine speed, reduce the processing time, reduce the auxiliary time, to improve production efficiency, and as the main auxiliary components-lathe tool holder, should also continue to improve and perfect its function. Although the lathe tool holder has emerged many improvements, but also part of the failure to meet, but these are temporary, so we must spend considerable to devote themselves to the improvement of equipment, this article tells about a scheme of ordinary lathe tool holder with improved.

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Yamato, Shuntaro, Toshiki Okuma, Kenichi Nakanishi, Junji Tachibana, Norikazu Suzuki, and Yasuhiro Kakinuma. "Chatter Suppression in Parallel Turning Assisted with Tool Swing Motion Provided by Feed System." International Journal of Automation Technology 13, no. 1 (January 5, 2019): 80–91. http://dx.doi.org/10.20965/ijat.2019.p0080.

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Parallel turning technology has been attracting attention as an important technology to enhance the productivity of multitasking machine tools. To maximize the productivity advantage of parallel turning, chatter avoidance or suppression is one of the most noteworthy concerns. In this study, a novel chatter suppression technique using tool swing motion is provided by a feed drive system. The optimal design methodology of the tool swing motion for effective chatter suppression is also introduced based on its analogy with the spindle speed variation technique under the shared-surface parallel turning and rigid-tool and flexible-workpiece assumptions. The proposed method was evaluated with regard to the chatter stabilizing performance and workpiece runout as compared to conventional equal pitch turning and unequal pitch turning for chatter suppression. As a result, the proposed tool swing parallel turning exhibited a high chatter stabilizing performance without eccentricity of the workpiece and enhanced surface quality, although particular swing marks were left on the machined surface.

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Guan, Shang Jun, Ke Yang, Jun You Sun, and Xin Jun Teng Li. "Virtual Design and Kinematics Simulation of a Combining CNC Machine Tool of Turning and Grinding Based on SolidWorks and ADAMS." Applied Mechanics and Materials 271-272 (December 2012): 565–69. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.565.

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This paper describes and introduces useing parameterization and variable of Modeling Technology of SolidWorks software of design procedures, to finish virtual design of machine Tool of Turning and Grinding. Then go on with interference check in and kinematics simulation for Tools and Turning. Use finite element analysis of ANSYS to go on with stress analysis for key points of load of the machine, to provide that physical design of the machine is reasonable. It is achieved forecast of workpiece property in the time of designing. Thus it will be achieved feasibility of designing and study of combining machine tool of turning and grinding in virtual environment, so as simplify process of designing, and shorten the development of period, and improve the quality of designing.

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Malviya, Vikas K., and Prashant K. Jain. "Computations for Simplification of Canned Cycles in CNC Programming for Turning Operations." Advanced Materials Research 383-390 (November 2011): 965–71. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.965.

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Canned cycles are predefined machine instructions stored permanently in the machine controller. These are used while writing part program to perform machining operations that are of repetitive nature. Whenever G & M code for these canned cycles appeared in part program, the controller of the machine calls already stored instructions and executes. However all CNC machines may not have facility to run part programs with canned cycles due to lack of computational facilities. The developed utility in this program allows part programmers to write part program using canned cycles and later on convert them in simplified programs to run on the low cost CNC machines. Present work deals with computations required to convert a canned cycle into linear interpolation based on the machining parameters assigned in that canned cycles. Developed code reads the CNC part program and extracts the desired points from presented canned cycles and perform desired geometric computations to converts it into simple part programs with elimination of canned cycles and writes in another text file in the form of a part program. Developed system is user friendly and made available online for users at http://virtualcnc.iiitdmj.ac.in. It implies a web based online client-server architecture which facilitates user to send their own CNC part programs with canned cycles at server site via internet and get the simplified part program which contains only linear interpolation at their end. Therefore the developed utility in this work can also provide an interface/exchange program for part programs between various CNC machines of different make.

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Wu, Dong Xu, Guo Li, Bo Wang, Zheng Qiao, and Lei Lv. "Fabrication of Microstructured Surfaces by Five-Axis Ultra Precision Machine Tool." Key Engineering Materials 625 (August 2014): 187–91. http://dx.doi.org/10.4028/www.scientific.net/kem.625.187.

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In this paper, a five-axis ultra precision machine tool for fabrication of microstructured surfaces is presented. This machine consists of two rotary axes (C&B) and three linear axes (X&Y&Z). High precision aerostatic bearing and torque motor are adopted in C axis (main spindle) and B axis. X axis and Z axis use the hydrostatic guideway and are driven by linear motors. Y axis is driven by torque motor and precision ball screw. This machine is able to realize multiple processing methods, including ultra precision diamond turning, ultra precision milling, fly-cutting, fast tool servo and slow tool servo diamond turning.Furthermore, a large number of experiment researches are carried out. Some typical microstructure surfaces are manufactured, for sinusoidal grid surface, the surface roughness Ra is 11.9nm, which is machined by slow tool servo diamond turning. Micro pyramid array surface is fabricated by using fly-cutting, which performs well both in the profile accuracy and the repeatability. These experiment researches prove that this ultra precision machine is superior in accuracy and system reliability.

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Murcinkova, Zuzana, and Karol Vasilko. "Decorating Cutting as New Approach to Machine Tool System Dynamics." Technological Engineering 11, no. 1 (December 1, 2014): 43–46. http://dx.doi.org/10.2478/teen-2014-0009.

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Abstract The paper presents so called decorating cutting focused on turning. It uses self-excited vibrations that are typical for turning and other types of cutting operations. The decorating turning do not utilize setting of unstable technological conditions of cutting process but it actively use the acting of cutting force on machine tool without generation of unwanted chatter vibrations. The special tool fixture was developed to utilize self-excited vibrations invoked by periodical changeability of cutting force by cutting process itself. Thus the typical texture of surface appears. The various macro/micro-textures of surfaces can be applied either for decorating purpose or for better holding of oil film.

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Fajrah, Nofriani, and Noviardi Noviardi. "Analisis Performansi Mesin Pre-Turning dengan Metode Overall Equipment Effectiveness pada PT APCB." Jurnal Optimasi Sistem Industri 17, no. 2 (October 30, 2018): 126. http://dx.doi.org/10.25077/josi.v17.n2.p126-134.2018.

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PT APCB is an electronics company that produces electronic device components called Narrow Shaft. The purpose of this study is to evaluate the maintenance activity in a pre-turning machine by measuring the Overall Equipment Effectiveness (OEE) level. The OEE level is obtained based on the Availability, Performance, and Quality Rate of the pre-turning machine maintenance activities. In addition, the purpose of this study is to identify the causes of the ineffectiveness of pre-turning machine maintenance activities and provide improvement suggestions for maintenance effectiveness at PT APCB. Based on the results of the calculation of the OEE value it is known that the PT APCB company still has not reached the world standard of 85%. This shows that the company still has to improve maintenance activities in the pre-turning process. The calculation of OEE value shows that the lowest OEE level in February 2016 was 48.31%, while the highest OEE level in September 2016 was 83.23%. The low performance of the pre-turning machine process was due to the ineffectiveness of maintenance activities which were caused by 14 factors. The primary causal factor with the highest value is the bar feeder problem with the highest request frequency value of 250.

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Yu, De Ping, Sze Wei Gan, Yoke San Wong, Mustafizur Rahman, and Geok Soon Hong. "Design of a Fast Tool Servo Based Diamond Turning Machine for Fabricating Micro-Structured Surfaces." Key Engineering Materials 443 (June 2010): 669–74. http://dx.doi.org/10.4028/www.scientific.net/kem.443.669.

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Increasing demand for ultraprecision components with micro-structured surfaces has attracted focus on diamond turning research. In this paper, a fast tool servo (FTS) based diamond turning machine is presented for fabricating micro-structured surfaces with high accuracy. A design criterion is established to serve as a guide in choosing or designing a suitable type of FTS for a micro-structured surface. Experiments on fabricating sampled micro-structured surfaces are carried out to demonstrate the effectiveness of the designed FTS based diamond turning machine.

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Journal articles on the topic 'Turning machine'

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