Relevant bibliographies by topics / CNC turning machine

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'CNC turning machine'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

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Journal articles on the topic "CNC turning machine"

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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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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 (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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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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Wang, Xiao Wei, Ze Hua Wang, and Mian Hao Zhang. "Development of CNC Five-Axis Turning Tool Cutter Grinder." Advanced Materials Research 1120-1121 (July 2015): 1330–35. http://dx.doi.org/10.4028/www.scientific.net/amr.1120-1121.1330.

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The precision of cutter grinding decides the level of cutting machining technology, and the precision of cutter is effectively improved through grinding by CNC technology. This paper first analyzed the key parameters of cutter grinding, and realized the functions of CNC five-axis grinding turning tool through design of the structure of CNC five-axis machine tool and building of the control system, to simplify the structure of machine tool, use open CNC control system, and reduce the cost of whole machine, convenient for promotion and use.
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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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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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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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Jamuna, R., and U. Natarajan. "Thermal Error Modelling in CNC Machines." Applied Mechanics and Materials 592-594 (July 2014): 1815–19. http://dx.doi.org/10.4028/www.scientific.net/amm.592-594.1815.

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Latest trend in increasing the performance characteristics of precision machines is reducing error in machines. Today research is focused on Machine tool accuracy. The effect of thermal error contributes to major part of 70% of volumetric error. The present study aims to establish a new compensation method for CNC Turning centre. Selection of proper temperature variables is a great task in thermal error compensation. In this paper 3 thermal process variables namely spindle speed; temperature and time are used to create thermal error models. Using ANSYS simulation experiments are created.
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Liu, Zhan Qiang, Jun Bo Zhang, and Zhi Tao Tang. "Intelligent Error Compensation in CNC Machining through Synergistic Interactions Among Modeling, Sensing and Learning." Materials Science Forum 471-472 (December 2004): 178–82. http://dx.doi.org/10.4028/www.scientific.net/msf.471-472.178.

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Industry is looking for practical means to improve the accuracy of the parts machined on CNC machines. Some artificial intelligence (AI) systems have been applied in modeling and compensating manufacturing process errors in CNC machining. However, these systems are not capable of predicting the results of a new operation if no sufficient data on a number of similar operations is available. A generalized AI approach named synergistic interactions amongst modeling, sensing and learning is proposed in this paper. Based on the AI approach, a new strategy of error compensation of workpiece dimension in CNC machining is developed and applied in a CNC turning center. Error compensation results are illustrated the effectiveness of the error compensation strategy. The learning curve shows that the error compensation confidence gradually progresses towards 100% confidence from zero along with the CNC machine operation time increasing.
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Guan, Shang Jun, Ke Yang, Jun You Sun, and Wen Jie Zheng. "The Design of a Horizontal Combining CNC Machine Tool of Turning and Grinding." Applied Mechanics and Materials 271-272 (December 2012): 544–48. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.544.

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This paper describes and introduces the design method and driving principle of the horizontal Combining CNC machine Tool of Turning and Grinding in which the turning tool holder and wheel frame are arranged on both sides. In the meantime, it verifies the reliability of this scenario by digital module and dynamic simulation, which creates a solid base for the manufacture of CNC in the future.
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Dissertations / Theses on the topic "CNC turning machine"

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Podloucký, Milan. "Konstrukce malého CNC soustruhu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230138.

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The aim of this master thesis is construction a small CNC lathe ideal for small series of mostly minor workpieces or for learning needs. In the first part of the work is carried out general literature search containing turning technology, tools for turning and the allocation of turning machines. There is also retrieval of small lathes located not only in our market. Based on research are selected technical parameters of the machine and carried out construction calculations. Also included is a 3D model of the entire assembly and assembly drawings of machine nodes.
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Renuka, Shivaswaroop R. "Development of models of CNC machines - EMCO VMC100 and EMCO TURN120P in virtual NC." Ohio : Ohio University, 1996. http://www.ohiolink.edu/etd/view.cgi?ohiou1178046654.

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Hampl, Petr. "Návrh technologie součásti "kryt vstřikovače" v podmínkách malé strojírenské firmy." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230365.

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Processing completely producting technological documentation for production part “INJECTOR COVER” for firm BM SERVICE (formerly ČKD Hradec Králové), including time schedule production of parts (parts which past welding and machining create demanded component part) and calculation production costs. Solving production process is concepted in two variation (actual and forecast study) for machines which are sorted from existing machinery and from now proposed machines. Estimation is designed for firm conditions introducing to the production with view for qualifications of workers, convention in firm and equipment.
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Horák, Vítězslav. "Konstrukce frézovací hlavy pro CNC soustruh s nastavitelným sklonem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417456.

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This thesis deals with design of CNC lathe milling head with B axis. Thesis includes research in CNC turning machines, their tool systems and overview of manufacturers of milling B axis. It also includes calculation of machining forces, design of spindle and design of B axis including necessary calculations. Part of this thesis is also 3D model and assembly drawing, 2 manufacturing drawings and list of items.
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Lin, Shi-Bin, and 林仕斌. "Development of Automatic Follower for CNC Turning Machine." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/41672942461509556917.

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碩士<br>崑山科技大學<br>機械工程研究所<br>102<br>Lathes are extensively used for machining in traditional process. Machine power generated has placed labor power during the process of industrial growth, because the structure of machinery is more stable. Turning process uses the component of rotation, cutting tool of straight-line motion and curvilinear motion to process and change its shape and size. After processing it will fit the requirement of design. This research provides speedy turning technology and improves new type of tool carring structure. To keep the technology more precise and efficient, this new automatic tool carrier can enhance stability of component process, and reduce abrasion of cutting tools. The creative structure includes a set of tool carrier and a follower. The main concept combines a cutting tool and a follower to turn into a simple structure. The distance between lathe tool and axle center is adjustable by slide structure. The whole mechanism fits traditional lathe to machine cylindrical component. With this arrangement, radial cutting forces are balanced with each other and the steady or follower rests in a regular lathe can be eliminated, for long and thin work pieces. Make the tooling structure more compact and more feasible for multi-head CNC lathe or combo machining. Experiment results confirmed the advantages of the innovative design to machine long-thin work pieces with stability as well as longer tooling life.
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Huang, Wei-Cheng, and 黃偉誠. "Research on the Surface Finish of Al-6061T6 on a CNC Turning Machine." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/e5jg9s.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>105<br>The purpose of this research is to study the surface finishing processes on the CNC turning machine for Al-6061T6, to improve its surface roughness. In order to improve surface roughness, the Taguchi’s L9 matrix experiments have been carried out to determine the suitable combination of the process parameters. By using S/N Ratio, the ANOVA analysis and the verification tests, the appropriate ball burnishing and ball polishing process parameters have been determined. According to the experimental results, the determined appropriate ball burnishing parameters were as follows : burnishing force of 60 N, feed rate of 0.05 mm/rev, spindle speed of 180 rpm and use of machine oil (cst68 @ 40ﾟC) as lubricant. The turned surface roughness of the test specimen could be improved from Ra 1.0 μm to Ra 0.147 μm. The appropriate ball polishing parameters were as follows : depth of penetration of 100 μm (1.59N), feed rate of 0.02 mm/rev, polishing speed of 15,000 rpm and spindle speed of 60 rpm. The burnished surface roughness could be improved from Ra 0.147 μm to Ra 0.097 μm. Applying these suitable parameters to the taper workpiece, the surface roughness of Ra 0.09 μm could be obtained.
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YAN, PEI-SHAN, and 顏珮珊. "Study on a Virtual Reality CNC Milling and Turning Machine Tool Operation Simulation and Human Machine Interface Integration System." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/96344600804762379645.

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碩士<br>國立高雄應用科技大學<br>機械與精密工程研究所<br>102<br>The configurations of CNC machine tool have evolved in these years resulting in more and more fruitful functionalities not only on the three-axis machines but also on the contemporary five-axis machine tool. Therefore, the operation efficiency of machining has been enhanced a lot and becomes more important although their structures are becoming more and more complicated. However, CNC machines are expensive. This financial burden has caused obstacles of an education institution in introducing sufficient real machine tool in cultivating novice students through hand-on operation practices. To the worse, the course hours of on-site practices had been cut resulting in bigger gap between the capability expectations of the industry and the education institution. Furthermore, the small-to-medium sized industry just could not afford to use the production machine tools in training inexperienced employees because the utilization rate of the machine will be reduced and the risk of collision will be higher. In order to improve the above problems, this study adopted off-the-shelf drawing software to create virtual controller panel based on real controllers such as Advantech-LNC, SYNTEC, and FANUC, etc. The 3D geometry of real CNC machines were also constructed by using 3D CAD software Solidwork, and the virtual machine tool were created by the virtual reality software EON. A virtual machine tool was then integrated based on the completed virtual controller panels and the virtual machine tools by the Microsoft Visual studio. The developed system could then be operated in both manual data input mode and in automatic mode. General desktop and lap top computer could be used in installing the developed system so as to facilitate more novice students to learn the basic operation of a CNC machine without being afraid of collision risk and the high maintenance cost it might incur. Keywords: Virtual Machine, Virtual Controller, NC Program
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Chang, Ching-Shui, and 張清水. "An Investigation on Optimization Parameters of Roughness and Roundness by Boring with a CNC Turning Machine Center." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/77972538788527004960.

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碩士<br>國立屏東科技大學<br>機械工程系所<br>104<br>In this study a CNC turning machine center is used for boring S45C carbon steel, the characteristics of surface roughness and the hole roundness are investigated respectively. In addition, the optimum parameters are obtained by using single objective quality analysis with conducting arranged experiments. An orthogonal array of Taguchi method is used to arrange the boring parameters, including spindle speed, feed rate, cutting amount of workpiece. The measurements of surface roughness and the hole roundness are conducted. The results showed that a 1.2468μm for surface roughness amount with milling and a 1.2174μm for surface roughness amount with turning and a 2.702μm for roundness amount with milling and a 2.128μm for roundness amount with turning are found by selecting optimum parameters in single objective quality analysis respectively. Therefore this leads to a conclusion that use a turning and milling combined machine tool can ensure the precision and handle several processes during operation. It can also raise the productivity. The achievement of this research can be used as reference in boring related research and industrial applications.
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Sun, Wei-Heng, and 孫偉恆. "Development of an Automated Tool Condition Monitoring System Based on the Machine Vision Method for the Inspection of Tools Used in CNC Turning Machines." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/289yb6.

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碩士<br>國立臺北科技大學<br>機電整合研究所<br>105<br>This study proposes a method for the online tool condition monitoring of the tools used for the cutting processes in computer numerically controlled (CNC) turning machines. Through this study, we have developed a device for online tool condition monitoring based on the machine vision/image capture method. One of the key features of the image capture device developed through this study is that it will not be affected by contamination from the cutting environment. Wear and tear of machine tools can typically be classified into four categories: fracture, built-up edge, chipping, and severe wear of the insert tip condition of the external turning tools. Methods for inspection of wear and tear used in the past relied on manual inspection of the tool insert or on statistical data analysis of cutting history. However, these methods were unable to effectively enhance the production efficiency of automated turning manufacturing. By leveraging the rapid advances in software, hardware devices, and technology for enabling machine vision in recent years, we have developed an automated online inspection system for tool condition monitoring, which can provide information regarding wear and tear in real time without the need for manual intervention, thereby improving production efficiency. To overcome the impact of contamination in the cutting environment on the image capture device and the tool images it records and to improve the robustness of the tool condition inspection method, we performed detailed analyses using four different images. The images captured include the tool wear exposure image, the tool flank exposure image, the tool wear feature image, and the tool flank feature image. For the tool wear features that cannot be inspected easily, we designed a light source device with an inbuilt capability for auto-modulation of light intensity. This helped maintain a similarity in luminance across different tool images captured, thereby enabling the selection of the appropriate wear feature image for analysis. An automated inspection of the condition of tools was conducted online using batch test samples provided by the manufacturer of the mechanical parts to verify the feasibility of applying the machine vision system developed in this study for actual monitoring of tools in the CNC turning machines. With the rapid growth in practical applications of robotized manufacturing cells (RMCs), this study also used the same method for the inspection of the RMCs by mounting the automated tool condition inspection module on the manipulator with six degrees of freedom, and by carrying out repeated inspections of the CNC turning tools for the manufacturing cell. Thus, we verified the stability and repeatability of the automated inspection system for the RMC and validated the robustness of the offset tool image captured using the machine vision device.
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Uquillas, Daniel Alberto Reyes, and Daniel Alberto Reyes Uquillas. "Tool Holder Sensor Design and Implementation using Strain Gauges to Measure Cutting Forces in CNC Turning Machines." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/s3m597.

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碩士<br>國立臺北科技大學<br>機電整合研究所<br>103<br>Cutting forces in machining operation are of great importance. There is a need to measure these forces by a simple and low cost solution. The present work covers the design and construction of a sensor to measure cutting forces generated in turning with a CNC lathe by attaching strain gauges directly inside of the tool holder, one on each side of the rectangular shank, to measure strain and estimate these forces. The design and implementation of the sensor consisted of three parts: The tool holder modification to attach the strain gauges, where a static analysis was done to find the best location to place them. The signal conditioning part in which a PCB was fabricated. This PCB holds the circuit for acquiring the signal and consists of a ½ Wheatstone bridge, an amplification stage, and a filter and offset stage. The third part is the data acquisition, where a NI cDAQ 9171 with an analog input module 9215 was used to capture the conditioned signal into the PC.
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Books on the topic "CNC turning machine"

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Smid, Peter. CNC control setup for milling and turning: Mastering CNC control systems. Industrial Press Inc., 2010.

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Book chapters on the topic "CNC turning machine"

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Shruthi, G., and O. S. Deepa. "Implementation of Six Sigma in CNC Turning Machine—A Case Study." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4320-7_25.

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Knol, Pierre H., Denes Szepesi, and Martin Huijbers. "New Design Features of a Fully Hydrostatic Ultra Precision CNC Turning Machine, Type Super-Microturn CNC." In Ultraprecision in Manufacturing Engineering. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-83473-8_16.

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Mondal, Sibabrata, and Dipankar Bose. "Evaluation of Surface Roughness in Wire Electrical Discharge Turning Process." In Machine Learning Applications in Non-Conventional Machining Processes. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-3624-7.ch008.

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This investigation presents an experimental investigation in developing small cylindrical pins in electrolytic tough pitch copper (ETP Cu) material using wire electrical discharge turning (WEDT) to evaluate surface roughness of the cylindrical turning faces. The material ETP Cu is soft in nature and has growing range of application in the field of aerospace and electronics industries for advanced applications. In this process, a customized rotary spindle has been developed and added to five-axis CNC wire electrical discharge machine (WEDM) and straight turning of the cylindrical pin has been done up to a length of 15mm with 0.5mm diameter. Under this investigation, 31 experiments along with two confirmation tests have been carried out to study the influence of four design factors—pulse on time, pulse off time, spindle speed, and servo voltage—on the machining performance of surface roughness by means the technique of design of experiment (DOE).
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Roy, Supriyo, J. Paulo Davim, and Kaushik Kumar. "Optimization of Process Parameters Using Taguchi Coupled Genetic Algorithm." In Mathematical Concepts and Applications in Mechanical Engineering and Mechatronics. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1639-2.ch004.

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In the era of mass manufacturing, Material removal rate and Surface Roughness are of primary concern even in manufacturing using contemporary CNC machines. In this work, L27 Orthogonal Array of Taguchi method is selected for three parameters (Depth of cut, Feed and Speed) with three different levels to optimize the turning parameters for Material Removal Rate and Surface Roughness on an EMCO Concept Turn 105 CNC lathe for machining SAE 1020 material with carbide tool. The MRR and SR are observed as the objective to develop the combination of optimum cutting parameters. The objectives were optimized using Taguchi, Grey Taguchi and NSGA-II. The result from these techniques was compared to identify the optimal values of cutting parameters for maximum MRR, minimum SR and best combination of both. This study also produced a predictive equation for determining MRR and SR for a given set of parameters outside the considered values. Thus, with the proposed optimal parameters it is possible to increase the efficiency of machining process and decrease production cost in CNC Lathe.
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Conference papers on the topic "CNC turning machine"

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Abbas, Tahseen F., Yousif K. Shounia, and Read R. Shwaish. "Teleoperating and monitoring of CNC turning machine under web framework." In 2ND INTERNATIONAL CONFERENCE ON MATERIALS ENGINEERING & SCIENCE (IConMEAS 2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0000152.

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Nakagawa, Kensuke, Taichi Mori, Yoshitaka Morimoto, et al. "Study on Turning of Non-Axisymmetric Three-Dimensional Curved Surfaces." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11100.

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Abstract Conventional machining of complex parts having three-dimensional curved surfaces is done by two processes using a five-axis machining center and a grinding machine. Although these tools make it possible to machine a product with complicated profiles, the tool path is complex and the process is time consuming. Also, because the amount of movement accompanying the control of the tool position increases, the productivity decreases. Therefore, we developed a CNC lathe for high-speed and high-efficiency machining in a previous study. The NC positioning table on which the tool is mounted is synchronized with the rotation angle of the main spindle; thus, the developed CNC lathe can form a three-dimensional curved surface on a workpiece. However, the previous study did not evaluate the surface profile of a product created with the developed CNC lathe. In this study, for the purpose of improving the contour accuracy of the machined workpiece, we propose a method for on-machine measurement and compensated machine tool position using the measurement result. The proposed on-machine measurement method is a non-contact method that employs a line laser displacement sensor. In the proposed method, the workpiece attached to the spindle of the CNC lathe is moved to a sensor reference position and measured. The measurement position is recorded in the NC machining program; thus, it is possible to adjust the tool position during machining to reduce the machining error by feeding the measurement results back to the machining program. Because machining is started in a state offset from the machining origin, the compensated machining can deal with both overcutting and undercutting of the workpiece. Testing of the proposed compensated method confirmed improvement in the desired profile accuracy.
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Fan, Jinwei, Haohao Tao, Yiling Zhang, and Peitong Wang. "Error modeling and sensitivity analysis of turning-milling compound CNC machine tools." In 2019 5TH INTERNATIONAL CONFERENCE ON GREEN POWER, MATERIALS AND MANUFACTURING TECHNOLOGY AND APPLICATIONS (GPMMTA 2019). AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5137878.

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Mori, Taichi, Yoshitaka Morimoto, Akio Hayashi, Yoshiyuki Kaneko, Naohiko Suzuki, and Ryo Hirono. "Study on Turning of Non-Axisymmetric Three-Dimensional Curved Surfaces." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87377.

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Conventional machining of complex parts having three-dimensional curved surfaces is performed in two steps using a five-axis machining center and a grinding machine. There is a problem with productivity. Therefore, we developed a CNC lathe to cope with high-speed machining. The newly developed CNC lathe has four axes (X1, X2, Z, C). In this machining, the tool on the X axis follows the curved surface synchronously with the rotation angle of the spindle. This cutting method enables machining of the three-dimensional curved surface. By adopting a linear motor for the X axis, high-speed reciprocal motion of the tool is realized, and the machining time has been reduced to approximately 1/30, as compared with the conventional milling process. In this operation, since high-response motion is required for the tool positioning, a certain profile error remains even if repeated control is applied using the linear scale. In the present study, for the purpose of improving the contour accuracy of a three-dimensional curved surface, we report the result of compensation between the profile measurement method of workpiece and the desired profile accuracy. After machining a three-dimensional curved surface by the developed CNC lathe, a line laser displacement sensor is used to measure the workpiece profile on the machine without removing the workpiece. The position of the machining program is measured by synchronizing the controller of the CNC lathe and the line laser displacement gauge. In addition, the desired profile accuracy is improved by compensating for the error between the desired profile accuracy and the measurement result.
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5

Morimoto, Yoshitaka, Katsuhiro Nakagaki, and Hideharu Kato. "Machining of Non-Axisymmetric Curved Surface by Lathe Turning." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63317.

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A new CNC lathe driven by a linear motor has been developed to realize the machining of complex non-axisymmetric curved surfaces with rotational axis such as eccentric and spiral cylindrical volume, conical cams and artificial femoral stem. These have been realized by milling and/or grinding machines. In this case, there is a serious problem. It takes a long time to machine by milling or grinding. Furthermore, the machining point between a curved surface and a milling tool or a grinding wheel can be regarded as a single point contact just as same as lathe turning. We propose a new turning method that improves the productivity remarkably by using a driven rotary tool with its unique tool layout. In this report, the machining result of the curved surface by the proposed turning method and the feasibility are also reported.
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6

Michaloski, John L., Johannes A. Soons, and Frederick M. Proctor. "Accessing the Performance of Model-Based Control in a Distributed Machine Tool Control Environment." In ASME 2004 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/detc2004-57792.

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Although Computerized Numerical Controller (CNC) machine tools have greatly improved precision, quality and productivity, there are still many areas where inaccuracies and inefficiencies remain. Model-Based Control (MBC) is a technique to advance machine tool accuracy and part quality by compensating for machine and process errors. Nominal Differential Expansion (NDE) thermal compensation is one MBC approach which we have integrated into a CNC turning machine testbed. To allow portability and redeployment of the CNC technology, the MBC testbed was implemented as a component-based system using a distributed programming infrastructure. This paper looks at software and performance issues related to distributed MBC architecture, which is slower due to increased overhead from network communication. We look at the requirements of distributed infrastructure as implemented by the Distributed Component Object Model (DCOM), and assess the performance of various DCOM configurations matching the MBC requirements. Results from our analysis of the distributed performance using MBC-based DCOM configurations are presented.
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Liu, Shiqing, Sunny Chan, Ho Ching, Tom Ching Kong, and Ruxu Du. "Development of a PC-Based Millimeter Scale CNC Turning Centre With Gear Hobbing Capability." In ASME 2008 International Manufacturing Science and Engineering Conference collocated with the 3rd JSME/ASME International Conference on Materials and Processing. ASMEDC, 2008. http://dx.doi.org/10.1115/msec_icmp2008-72311.

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Currently, a trend of extreme product miniaturization is particularly evident in sectors such as portable multimedia devices, communications, aerospace and biomedical devices. With increasing product compactness, the demand for precision miniature components is driven higher and higher and the ability to manufacture these components accurately, swiftly and cost effectively is critical for manufacturers to maintain market competitiveness. However, traditional machine tools become ineffective for cutting miniature components. This paper presents our efforts in developing a PC-based millimeter scale turning centre (referred to as MMT hereafter) with gear hobbing capability to machine miniature gears. The system architecture of our 2nd-gerneration MMT is given. In order to fine-tune the micro gear hobbing process to maximize the gear profile accuracy, the mechanics of the process must be thoroughly understood. In order to do so, a computer simulation tool is developed. The simulation procedure and simulation with different process defects are discussed in detail. 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 0.3mm.
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8

Wang, Hongjun, Qiushi Han, Guoxin Wu, and Chao Ma. "The study of opened CNC system of turning-grinding composite machine tool based on UMAC." In Fourth International Seminar on Modern Cutting and Measuring Engineering, edited by Jiezhi Xin, Lianqing Zhu, and Zhongyu Wang. SPIE, 2010. http://dx.doi.org/10.1117/12.888031.

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Romo, E. Gutierrez, and J. Caldero´n. "Optimization of CNC Cutting Parameters by the Electrical Power Method: Turning Case." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-80990.

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As machining processes become one of the most common kinds of manufacturing processes in industry, it becomes imperative to optimize cutting parameters in order to reduce machining times and increase surface quality. This is specially true when piece geometry demands high rates of material removal. In previous work by the authors, piezoelectric dynamometers have been used to find cutting forces which in turn allows finding of optimal cutting parameters. Although the methodology reported has proved to be very effective, its application in the production line has not been straightforward as the use of a piezoelectric dynamometer requires an expensive setup and skilled technicians. The objective of this work is to propose and validate an experimental methodology that allows the determination of optimal cutting parameters for material-tool pairs by measuring the electrical power consumed by the machine-tool during cutting. This latter approach is more economical and easy to apply in the manufacturing line. Optimized parameters obtained through this methodology yield improvements up to more than twice on removal rates compared to those recommended by tool suppliers for the same process requirements.
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10

Buyukhatipoglu, Kivilcim, Ismail Lazoglu, Hubert Kratz, and Fritz Klocke. "Mechanics and Dynamics of Hard Turning Process." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61067.

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In precision machining, due to the recent developments on the cutting tools, machine tool structural rigidity and improved CNC controllers, hard turning is an emerging process as an alternative to some of the grinding processes by providing reductions in costs and cycle-times. In industrial environments, hard turning is established for geometry features of parts with low to medium requirements on part quality. Better and deeper understanding of cutting forces, stresses and temperature fields, temperature gradients created during the machining are very critical for achieving highest quality products and high productivity in feasible cycle times. In order to enlarge the capability profile of the hard turning process, this paper introduces to prediction models of mechanical and thermal loads during turning of 51CrV4 with hardness of 68 HRC by CBN tool. The shear flow stress, shear and friction angles are determined from the orthogonal cutting tests. Cutting force coefficients are determined from orthogonal to oblique transformations. Cutting forces and surface profiles are predicted and compared with experimental measurements.
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