Relevant bibliographies by topics / Small CNC turning machine

Contents

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

Academic literature on the topic 'Small CNC turning machine'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Small CNC turning machine"

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Czan, Andrej, Anton Martikan, Jozef Pustay, Viktor Kuzdak, and Jozef Mrazik. "Small Diameter Drilling Of Titanium Alloys on CNC Turning Machine." Technological Engineering 11, no. 2 (2014): 5–8. http://dx.doi.org/10.2478/teen-2014-0010.

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Abstract The article deals with drilling of titanium alloys, which are becoming more widely used in aerospace and automotive industry as well as in other sectors for its specific properties such as hardness, corrosion resistance, biocompatibility, etc. The aim of this article is basic research with focus on drilling conditions of titanium alloy using HSS drill bits with diameter ø2,3 mm with PVD coating and without coating on CNC turning machine Polygim Diamond 12 series. This research can support problem solutions in small diameter drilling.
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Donaldson, R. R., D. C. Thompson, and E. G. Loewen. "Design and Performance of a Small Precision CNC Turning Machine." CIRP Annals 35, no. 1 (1986): 373–76. http://dx.doi.org/10.1016/s0007-8506(07)61909-x.

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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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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 (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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Furdui, Filip, and Carmen Adriana Cîrstoiu. "Experimental Research on Surface Roughness in Turning of E355 Alloy Steel on CNC Machine Tool." Applied Mechanics and Materials 760 (May 2015): 385–90. http://dx.doi.org/10.4028/www.scientific.net/amm.760.385.

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This work suggests some possibilities of determination of cutting conditions for the cutting process.The most important factors affecting the surface roughness of machined sourfaces are the cutting parameters. It was shown in the paper the influence of finishing cutting regimes, for a given geometry of insert, on surface roughness of turned surfaces on CNC lathe, with higher cutting speeds than those used on conventional machine tools and with very small advances and cutting depths, thus explaining certain phenomena that occur in the cutting process.
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Sarankó, Ádám, Gábor Kalácska, and Róbert Keresztes. "Analysis of Vibration During Turning Process of Different Materials." International Journal of Engineering and Management Sciences 4, no. 1 (2019): 200–205. http://dx.doi.org/10.21791/ijems.2019.1.25.

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In this article, we would like to introduce the problems caused by vibrations in case of polymer turning processes. Nowadays there is a lot of research in this topic, to avoid the unnecessary phenomena of vibrations. The two most common methods are the Spindle Speed Variation (SSV), and the Vibration Assisted Machining (VAM). In case of SSV, the CNC machine can increase and decrease the speed of spindle continuously during turning which can significantly reduce the effects of chatter. This method is beneficial for longer workpieces when there is not any support except the chuck. Vibration-assisted machining can be used to minimise the problems caused by vibrations. VAM combines precision machining with small-amplitude tool vibration to improve the fabrication process. It has been applied to some processes ranging from turning, drilling to grinding. Based on the enumerated above we made some trial measurements about the basic vibrations of the turning tool shank. The tests were done on an NCT EUROturn-12B CNC machine which can found in the workshop of our institute. The tested material was Polyamide 6 because this is the most commonly used polymer in the industry. In the future, we would like to test some other basic and composite polymer materials too. The equipment was served by a specialist from SPM Budapest Kft. With these tests, our goal was to make sure that the equipment and the measuring setup are suitable for our future research.
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Igaz, Rastislav, Richard Kminiak, Ľuboš Krišťák, Miroslav Němec, and Tomáš Gergeľ. "Methodology of Temperature Monitoring in the Process of CNC Machining of Solid Wood." Sustainability 11, no. 1 (2018): 95. http://dx.doi.org/10.3390/su11010095.

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The issue of the change in tool temperature as a result of the machining process is presented in this paper. The aim of the paper is to put forward a proposal and subsequently to verify the methodology of temperature monitoring in the process of computer numerical control (CNC) machining in real time. Subsequently, the data can be used in the process of adaptive machine-tool control. Experiments were used to determine whether the research method is appropriate. Oak, beech and spruce wood turning blanks with the thickness of 20 mm were machined using a 5-axis CNC machining centre. A temperature change observation resulting from the changes in parameters of the removed layer was used to test whether the research method is relevant. Parameters of the removed layer were affected by the changes in feed rate in the range from 1 ÷ 5 m·min−1 in the removed layer (1–5 mm) or in wood species used in the experiment. As emerges from the proposed methodology, it is possible to monitor the changes in tool temperature responding to minimal changes in technological parameters on a relatively small size of a milled surface quite accurately. Sensitivity to given changes in technological parameters as well as the importance of the methodology was proven.
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Maslov, A. R., and E. M. Smolkin. "Study of the tool for boing of small-size parts on turning rod machines with CNC." Вестник МГТУ Станкин, no. 2 (2020): 24–27. http://dx.doi.org/10.47617/2072-3172_2020_2_24.

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Tangjitsitcharoen, Somkiat. "Prediction of Surface Roughness on CNC Turning Based on Monitoring of Cutting Force and Cutting Temperature." Advanced Materials Research 690-693 (May 2013): 2540–49. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.2540.

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This paper presents the surface roughness model which is proposed and developed to predict the surface roughness in the CNC turning of the carbon steel with the coated carbide tool under various cutting conditions by using the response surface analysis with the Box-Behnken design based on the experimental results. The in-process monitoring of the cutting force and the cutting temperature is utilized to analyze the relation between the surface roughness and the cutting condition. The tool dynamometer and the infrared pyrometer are employed and installed on the turret of CNC turning machine to measure the in-process cutting force and cutting temperature. The models of cutting force ratio and cutting temperature are also developed based on the experimental data. The optimum cutting condition is determined referring to the minimum surface roughness of the surface plot, which is obtained from the developed surface roughness model. The experimental results show that the higher cutting speed gives the better surface roughness due to the higher cutting temperature, however the tool life becomes shorter. The feed rate is the most significant factor which affects the surface roughness, while a small depth of cut helps to improve the surface roughness. The effectiveness of the surface roughness prediction model has been proved by utilizing an analysis of variance (ANOVA) at 95% confident level. Hence, the surface roughness can be predicted and obtained easily referring to the developed surface roughness model.
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Handawi, Mohamed, Amad Elddein Issa Elshwain, Mohd Yusof Noordin, Norizah Redzuan, and Denni Kurniawan. "Comparison between Nitrogen-Oil-Mist and Air-Oil-Mist Condition when Turning of Hardened Tool Stainless Steel." Applied Mechanics and Materials 660 (October 2014): 18–22. http://dx.doi.org/10.4028/www.scientific.net/amm.660.18.

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Minimum quantity lubrication (MQL) or as it’s called semi dry cutting is a technique which spray a small value of lubricant flow rate to the cutting zone area. MQL has been used in many machining process with different cutting tools and workpiece materials due to its green environments and economically advantageous. MQL has become an attractive option to dry and flood cutting in terms of reduce the temperature in the cutting zone and reduce the cost of the product. However, in MQL seems to be machining limited by cutting temperature, because at high speed the effect of oil mist becomes evaporated. Therefore another alternative cooling approach was used with oil mist in this research. This research presents study the performance of nitrogen gas as a coolant and oil mist as lubricant in turning of hardened stainless tool steel (STAVAX ESR) with hardness 48 HRC. Using a gas as coolant with oil mist is a new solution for enhancing machinability. Turning experiments are carried out on CNC turning machine. The cutting insert grade is KC5010 (PVD-TiAlN wiper coated carbide). The experimental results were: 1) nitrogen gas with oil mist prolongs tool life compare with air with oil mist. 2) better product surface finish by using nitrogen gas with oil mist.
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Dissertations / Theses on the topic "Small 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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Son, Seung-Kil 1964. "A hybrid type small 5-axis CNC milling machine." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/29275.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2002.<br>Includes bibliographical references (leaves 116-119).<br>5-axis CNC milling machines are important in a number of industries ranging from aerospace to consumer-die-mold machining because they can deliver high machining accuracy with a spindle tilting capacity. Most of these machines have serial mechanisms so that low static and dynamic stiffness become very critical design issues especially for high speed machining. Parallel mechanisms have recently received attention from machine tool designers because of their inherent potential for stiffness and because of their compactness. However, much of the promised advantages of parallel machines only occur within a very small region of their workspace with the expense of the large machine-tool foot print. We discuss some of the kinematic and structural challenges to extracting machining performance from serial and parallel machines. We compare a hybrid machine, which combines serial and parallel mechanisms, with typical serial and parallel machines such as Euler angle machines and the Hexapod. In particular, we consider singularities, reversal characteristics, and manufacturability. We show that hybrid machines can benefit from the advantages of serial and parallel mechanisms while avoiding most potential pitfalls of both mechanisms. However, hybrid structures can suffer from the manufacturing problem of over-constraint. We show that the degree of over-constraint depends on the size of the parallel machine. We have designed and fabricated a small hybrid 5-axis motion platform, the MIT-SS-1, which can tolerate this over-constraint through a novel layout of axes. Numerical and experimental test results of the MIT-SS-1 are presented and compared. Finally we show that this structure has potential as a small 5-axis CNC milling machine.<br>by Seung-Kil Son.<br>Ph.D.
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Jagoš, Roman. "Konstrukce malé CNC frézky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230234.

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This master´s thesis deals with design of small CNC milling machines and comparing CNC tabletop milling machines in the world market. It is also done design of small CNC milling machine through the use of contemporary and modern trends, used in design of machine tools.
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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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Dodgson, Mark. "Work organisation and skills in small engineering firms using CNC in machine tools." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37675.

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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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Havlíček, Ondřej. "Návrh malé modelářské CNC frézky s pohyblivým stolem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401057.

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This master thesis deals with the constructional design of small CNC milling machine with a sliding table. The first part of the work describes small CNC milling machines currently available on the market. Based on the result of the literature review, the small CNC milling machine was constructed with respect to the currently available trends, including sizing and drawing documentation of the machine.
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Kovács, Zdeněk. "Návrh CNC frézky pro modelářské dílny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382241.

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This diploma thesis deals with the design of a CNC milling machine for the puspose of modeling workshop. In the first part is carried out the search in the field of small CNC milling machines for better familiarization with this issue. The information obtained in the first part of the thesis is used for determination the parameters of the designed machine. The last part deals with the design and realization in the form of a 3D model.
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Vaverka, Jiří. "Obrábění součástí v malosériové výrobě s aplikací CNC strojů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318693.

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The topic of this thesis is the choice of optimal production technology for the chosen representative. The aim of this work is to compare production on conventional machine and on NC and CNC machines. Both variants are evaluated in terms of efficiency, speed and economy of production. Outputs are based on recommended production procedures based on the number of pieces produced in the order.
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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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Books on the topic "Small CNC turning machine"

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D, Brenner George, ed. Smart assets: Turning you and your business into a wealth machine. McGraw-Hill, 1998.

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D, Brenner George, ed. Smart assets: Turning you and your business into a wealth machine. Irwin Professional Pub., 1996.

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Hill, Stanfield, Barry L. Rabinovich, and Ronald G. Bachrach. Smart Assets: Turning You and Your Business into a Wealth Machine. Irwin Professional Publishing, 1996.

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Book chapters on the topic "Small 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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Ranjan, Chikesh, Hridayjit Kalita, B. Sridhar Babu, and Kaushik Kumar. "Application of Evolutionary Optimization Techniques Towards Non-Traditional Machining for Performance Enhancement." In Machine Learning Applications in Non-Conventional Machining Processes. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-3624-7.ch011.

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Electro-chemical machining is a non-conventional machining method that is used for machining of very complicated shape. In this chapter an attempt has been made to carry out multi-objective optimization of the surface roughness (SR) and material removal rate (MRR) for the ECM process of EN 19 on a CNC ECM machine using copper electrode through evolutionary optimization techniques like teaching-learning-based optimization (TLBO) technique and biogeography-based optimization (BBO) technique. The input parameters considered are electrolyte concentration, voltage, feed rate, inter-electrode gap. TLBO and BBO techniques were used to obtain maximum MRR and minimum SR. In addition, obtained optimized values were validated for testing the significance of the TLBO and BBO techniques, and a very small error value of MRR and SR was found. BBO outperformed TLBO in every aspect like less percentage error and better-optimized values; however, TLBO took less computation time than the BBO.
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Regev, Ronny. "Producing." In Working in Hollywood. University of North Carolina Press, 2018. http://dx.doi.org/10.5149/northcarolina/9781469636504.003.0002.

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The first chapter concentrates on a small group of men employed as studio head-producers. It argues that they were the Henry Fords of the industry, responsible for turning Hollywood into an effective modern entertainment machine. People like Irving Thalberg, David O. Selznick, and Darryl Zanuck arrived on the scene in the early 1920s and successfully reshaped the studio from an informal workplace to a well-thought-out operation with function-specific divisions and tasks. Their newly fashioned Hollywood lots served as intermediary spaces, accommodating the demands of profit seeking corporate executives as well as artists. The chapter shows how, on a day-to-day basis, head producers translated the demands and visions of each group to the other. It demonstrates how these producers served as brokers, embodying the contradictions of the system while closely supervising the production process of every picture and the studio as a whole.
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Conference papers on the topic "Small CNC turning machine"

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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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Pierson, Harry A., and Kumer V. Singh. "Tunable and Transferrable Bar Feeder Damping Design for Advanced Manufacturing." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-64970.

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The economical production of high-value, low-volume, machined components is an important subtopic of advanced manufacturing. Bar feeders, a well-established technology for adding a high degree of automation to CNC turning centers by feeding 12′ lengths of stock through the machine spindle, have limitations in this realm. They rely on supporting the entire length of the stock in a continuous fluid bearing in order to suppress potential vibrations. Although this results in excellent vibration suppression, long tooling changeovers make them impractical for small batch sizes. Additionally, the expense of the tooling can render them cost-prohibitive. Thus a bar feeder technology is desired that provides comparable vibration suppression for a wide variety of stock sizes without the need for size-specific tooling changes. In this, a movable point support having tunable viscoelastic properties is studied for controlling the vibration of varying lengths of bar stock in a given speed range. The transverse vibration of mounted bar stock is modeled as a Bernoulli-Euler beam. The effects of the support position, viscoelastic model, and their associated parameters on the resonant frequencies, damping ratios, and vibration response of the bar stock are studied. Such a study will be instrumental in developing passive/active vibration control strategies for future bar feeders.
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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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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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Jokanovic, Simo. "Communication with CNC machine through DNC interface." In 2016 International Symposium on Small-scale Intelligent Manufacturing Systems (SIMS). IEEE, 2016. http://dx.doi.org/10.1109/sims.2016.7802894.

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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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"Design of Small CNC Grinding Machine System based on Motion Control Card." In 2018 3rd International Conference on Computer Science and Information Engineering. Clausius Scientific Press, 2018. http://dx.doi.org/10.23977/iccsie.2018.1077.

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He, Xin. "Design of Small CNC Grinding Machine System based on Motion Control Card." In 2019 IEEE 2nd International Conference on Automation, Electronics and Electrical Engineering (AUTEEE). IEEE, 2019. http://dx.doi.org/10.1109/auteee48671.2019.9033175.

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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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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.

Full text
Abstract:
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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