Thematische Bibliographien / CNC modeller milling machine

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Auswahl der wissenschaftlichen Literatur zum Thema „CNC modeller milling machine“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 18. Februar 2022

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Zeitschriftenartikel zum Thema "CNC modeller milling machine"

Kwintarini, Widyanti, Agung Wibowo und Yatna Yuwana Martawirya. „Mathematical Approach for Geometric Error Modeling of Three Axis CNC Vertical Milling Machine“. Applied Mechanics and Materials 842 (Juni 2016): 303–10. http://dx.doi.org/10.4028/www.scientific.net/amm.842.303.

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The aim of this paper overviews about to find out the errors that come from three axis CNC vertical milling machine. The errors come from, the CNC milling machine can be modelled into mathematical models and later on these error models will be used to analyse the errors in the measured data. Many errors from CNC machine tools have given significant effects toward the accuracy and repeatability of manufacturing process. There are two error sources come from CNC machine tools such as tool deflection and thermal distortions of machine tool structure. These errors later on will contribute to result in the geometrical deviations of moving axis in CNC vertical milling machine. Geometrical deviations of moving axis such as linear positioning errors, roll, pitch and yaw can be designated as volumetric errors in three axis machine tool. Geometrical deviations of moving axises happen at every axis in three axis CNC vertical milling machine. Geometrical deviations of moving axises in linear and angular movement has the amount of errors up to twenty one errors. Moreover, this geometrical errors play the major role in the total amount of errors and for that particular reason extra attention towards the geometrical deviation errors will be needed along machining process. Each of geometrical error of three axes vertical machining center is modeled using a homogeneous transformation matrix (HTM). The developed mathematical model is used to calculate geometrical errors at each axis and to predict the resultant error vector at the interface of machine tool and workpiece for error compensation.

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Isa, Halim, M. A. Rahman, Hasan Hazmilah, Haeryip Sihombing, Adi Saptari, Abu Bakar Baharudin und Ahmad Syaheera. „Ergonomic Design of CNC Milling Machine for Safe Working Posture“. Applied Mechanics and Materials 465-466 (Dezember 2013): 60–64. http://dx.doi.org/10.4028/www.scientific.net/amm.465-466.60.

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In milling operation, Computer Numerical Control (CNC) milling machine has been recognized as one of effective solutions for high productivity, efficiency, and precision. However, the existing CNC milling machine has contributed to ergonomics-related problems such as awkward working posture. The aim of this study is to redesign the existing CNC milling machine by considering working posture of the machinist. This study performed questionnaire survey to determine ergonomics feature requirements from the machinist. The requirements of the machinist are then translated using Quality Function Deployment (QFD) to obtain technical specifications of new design CNC milling machine. The working posture of machinist during operating the existing CNC milling machine and the redesigned CNC milling machine was assessed using Rapid Upper Limb Assessment (RULA). Based on the analysis, the redesigned CNC milling machine has improved the working posture as shown by low score of RULA. This study concluded that by considering the ergonomics feature requirements to the design of CNC milling machine enabled the machinists to perform milling operation in safe working posture. This study suggests that environmental factors should be considered in the future research works.

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Cao, Shu Kun, Shang Wei Yang, Xiu Sheng Chen, Gui Cong Wang und Wei Wei Song. „Milling Machine Design Based on Open CNC System“. Applied Mechanics and Materials 52-54 (März 2011): 887–92. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.887.

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Completed structure of milling machine design based on open CNC system through the combination of multi-axis motion controller and the way of NC embedded PC. The traditional CNC milling machine combined with technology of many aspects of Precision machinery, electronics, electric drive, automatic control, automatic detection, and computer and so on. High-precision high efficiency and high flexibility of the CNC milling machine makes it has more widely applications. But there are some problems, for example, based on the traditional CNC milling system for work-piece processing is also not very convenient, and traditional CNC system must be G code programming first, then process work-piece, in addition, as the closed nature of traditional CNC systems, products of hardware and software of the CNC manufacturers are not compatible, and system’s training and maintenance costs much, we put forward the open CNC system, then we start to research and analysis the Milling Machine Design Based On Open CNC System.

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Zhang, Ming Kai, und Jun Fang Ni. „CNC Transformation of X502 Milling Machine“. Advanced Materials Research 472-475 (Februar 2012): 2072–75. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.2072.

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NC transformation of milling machine not only reduces the investment cost, but also improves the machining accuracy of machine components and productivity. This paper presents NC transformation of X502 milling machine, the main researches include the mechanical parts of the transformation plan, the calculation and selection of key mechanical components such as reduction gears, ball screws and stepper motors. According to requirements for the machine control system, electrical system is improved, the proper CNC system is also chosen. After transformation, X502 milling machine is promoted greatly and obtains excellent efficiencies and effectiveness in use.

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Dias, Nuno, Hugo Alvarinhas, André Quintã und José Santos. „WEB ENABLED CNC MILLING MACHINE CONTROL“. IFAC Proceedings Volumes 39, Nr. 3 (2006): 759–64. http://dx.doi.org/10.3182/20060517-3-fr-2903.00377.

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J, Junaidi. „Working process of TU 3a CNC frais machine using software system“. International Journal of Engineering & Technology 9, Nr. 3 (05.08.2020): 658. http://dx.doi.org/10.14419/ijet.v9i3.29682.

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This workpiece process is: to find out how to transfer images from Auto CAD software to the Q plus CELL Milling Cnc software, and to find out how to transfer programs from the CNC Milling QELL KELLER software to the TU 3A CNC milling machine. The making of this workpiece uses three main media, namely Auto CAD 2000 software, CNC Milling KELLER Q plus software, and TU 3A CNC milling machine. The process of making the workpiece starts from making the workpiece design in Auto CAD software which is then stored on the CDR via DFX data. The design of the workpiece contained in the CDR is then transferred to CNC Millling KELLER Q plus software via Geometry. in Geometry, the design of the workpiece is dimensioned. Completed from the Geometry the workpiece design is included in the Work plan to be processed so that it can be simulated to move to a CNC program to convert the graphical language into a numeric language so that it can be read by a CNC machine. The programming results from the CNC KELLER Q plus software are then recorded to be executed on the CNC TU 3A milling machine to obtain the workpiece in accordance with the design in AutoCAD. Programming results from CNC Milling KELLER Q plus software cannot be directly used on the TU 3A milling machine (EMCO), because the programming language used is different. Programming language in CNC Milling KELLER Q plus software uses the DIN 66025 standard, while the CNC TU 3A (EMCO) milling machine uses ISO standards, so it needs to be converted first.

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Zhu, Cheng Jun, Qi Shu Qin und Peng Er Bao. „The Study of the Multi-Body System Theory on Basis of CNC Milling Machine Error“. Advanced Materials Research 383-390 (November 2011): 1304–9. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.1304.

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CNC machine, especially CNC milling machine, is the main production equipment in the industries of machinery, iron and steel, automobile manufacturing and so on. However, the errors are the main constraints to the processing quality and the precision measurement of CNC machine. Based on the multi-body system theory, the article models the error of Siemens CNC milling machine. In terms of the analysis of the error model, it is argued that the processing precision of CNC milling machine can be improved through controlling and compensating the error in the process of installation and manufacturing.

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Zhu, Cheng Jun, Qi Shu Qin und Peng Er Bao. „The Study of the Multi-Body System Theory on Basis of CNC Milling Machine Error“. Advanced Materials Research 433-440 (Januar 2012): 444–49. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.444.

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Zhang, Lin, Wen He Liao und Hui Yang. „A New Miniaturized CNC Machine Tool“. Advanced Materials Research 97-101 (März 2010): 3259–62. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.3259.

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A miniaturized CNC (Computerized Numerical Control) milling machining equipment was mentioned for micro milling processing. The equipment has a highest spindle speed of 90000rpm and the positioning accuracy of submicron. Furthermore, it described the design of CNC servo system of precision stage driven by linear motor. The servo experiments results verified the excellent static and dynamic performance of the system. The machining tests included a plane with a surface roughness of 215nm using a end milling cutter of Φ0.2μm, micro straight slots with a dimension error range of 1-2μm using a ball-end cutter of Φ0.2μm and some complex structures. The analysis results of these tests show that the system is able to fulfill the micro milling machining of micro components.

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Peng, Er Bao, Yu Hua Zhang und Hong Ying Wang. „Study on Kinematic Features of CNC Machine Based on Multi-Body System Theory with Error Modeling“. Advanced Materials Research 676 (März 2013): 149–52. http://dx.doi.org/10.4028/www.scientific.net/amr.676.149.

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CNC machine, especially CNC milling machine, is the main production equipment in the industries of mechanics, iron and steel, automobile manufacturing and so on. However, the errors are the main constraints to the processing quality and the precision measurement of CNC machine. Based on the multi-body system theory, the article models the error of Siemens CNC milling machine and kinematic. In terms of the analysis of the error model, it is argued that the processing precision of CNC milling machine can be improved through controlling and compensating the error in the process of installation and manufacturing.

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Dissertationen zum Thema "CNC modeller milling machine"

Večeř, Petr. „Konstrukční návrh malé modelářské CNC frézky“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254333.

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This thesis deals with the structural design of small model CNC milling machines. The work includes research modeller CNC milling machines available primarily on the Czech market, on whose basis are then selected the appropriate parameters for machine design. The thesis contains further structural calculations, selection of appropriate components, production drawings and 3D model that shows the final solution of constructed facility.

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Strnad, Jiří. „Návrh malé multifunkční modelářské CNC frézky“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444277.

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This diploma thesis deals with the construction proposal of a small multifunctional modeller CNC milling machine that enables milling of aluminium alloys and 3D printing using the FDM method. Based on the research, analyzes and defined entry requirements the construction proposal is created and verified by calculations. The thesis contains a description of all the construction parts including the printhead, the tool tray and the safety cover. The other part of the thesis describes the machine geometry adjustment and specifies the choice of control system. The thesis includes a 3D model and the drawing documentation of selected structural nodes.

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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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Resiga, Alin. „Design Optimization for a CNC Machine“. PDXScholar, 2018. https://pdxscholar.library.pdx.edu/open_access_etds/4257.

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Minimizing cost and optimization of nonlinear problems are important for industries in order to be competitive. The need of optimization strategies provides significant benefits for companies when providing quotes for products. Accurate and easily attained estimates allow for less waste, tighter tolerances, and better productivity. The Nelder-Mead Simplex method with exterior penalty functions was employed to solve optimum machining parameters. Two case studies were presented for optimizing cost and time for a multiple tools scenario. In this study, the optimum machining parameters for milling operations were investigated. Cutting speed and feed rate are considered as the most impactful design variables across each operation. Single tool process and scalable multiple tool milling operations were studied. Various optimization methods were discussed. The Nelder-Mead Simplex method showed to be simple and fast.

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Ebrahimi, S. Morteza K. „Dynamic modelling and simulation of a CNC milling machine“. Thesis, Cardiff University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287909.

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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.
Includes bibliographical references (leaves 116-119).
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.
by Seung-Kil Son.
Ph.D.

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Ajilo, Deborah (Deborah M. ). „eyeDNA : Tool Condition Monitoring for a desktop CNC milling machine“. Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/115670.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2018.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 81-84).
Tool wear is a major obstacle to realizing full automation in metal cutting operations. In this thesis, we designed and implemented a low cost Tool Condition Monitoring (TCM) system using off-the-shelf sensors and data acquisition methods . Peripheral end milling tests were done on a low carbon steel workpiece and the spindle vibration, cutting zone temperature and spindle motor current were recorded. Features from these data sources were used to train decision tree models in MATLAB with the aim of classifying the stages of tool wear. Results showed that the feature sets fusing information from all data sources performed the best, classifying the tool wear stage with up to 93% average accuracy.
by Deborah Ajilo.
S.M.

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Hanzal, Jiří. „Návrh malé modelářské CNC frézky s pevným stolem“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-433604.

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The topic of this work is the design of a small model CNC milling machine with a fixed table for machining wood, plastic, or light alloys (Al, Zn, etc.). It also includes a calculation report and drawing documentation of selected nodes. The beginning of this work consists of an introduction to the issue of milling machines, their distribution and subsequent market analysis. Subsequently, the input parameters are designed on the basis of market analysis and in the last part there is a calculation report, the design of the milling machine itself and a short economic evaluation.

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Buš, Martin. „Návrh hobby CNC frézky“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417754.

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This master thesis is focused on design of CNC hobby milling machine.In the first part of master thesis there are brief information about construction of CNC milling machines with varios types of milling machines available on market. After that, is made a selection of suitable machine componets for selected parameters. Futhermore, the masters thesis include a solutions of the component on all axes CNC milling machines.

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Ludva, Jan. „Konstrukční návrh portálové CNC frézky“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241719.

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This master’s thesis deals with a design of a portal CNC milling machine. The thesis contains a description of milling machine’s single types, analysis of Czech and foreign market and analysis of basic milling machine’s groups. The work includes calculating of cutting forces and moments of a chosen tool, choice of spindle and design of axe’s drive systems. The thesis also includes 3D model of the chosen variant, it’s by a method of final elements and finally drawing documentation.

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Buchteile zum Thema "CNC modeller milling machine"

Jabran, Sohaib, Shajee Ahmed, Sarmad Afzal und Faizan Tariq. „Axes CNC Milling Machine“. In Functional Reverse Engineering of Strategic and Non-Strategic Machine Tools, 41–56. First edition. | Boca Raton : CRC Press, 2021. |: CRC Press, 2021. http://dx.doi.org/10.1201/9780367808235-5.

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Gordon, Seamus, und Michael T. Hillery. „Linear Motor based High Speed CNC milling Machine“. In Proceedings of the 33rd International MATADOR Conference, 519–24. London: Springer London, 2000. http://dx.doi.org/10.1007/978-1-4471-0777-4_80.

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El-Midany, T. T., I. M. Elewa und A. Mostafa. „Design and Manufacturing of CNC Training Vertical Milling Machine“. In Proceedings of the Twenty-eighth International, 147–53. London: Macmillan Education UK, 1990. http://dx.doi.org/10.1007/978-1-349-10890-9_21.

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Kumar, Narendra, Prashant K. Jain, Puneet Tandon und Pulak M. Pandey. „Toolpath Generation for Additive Manufacturing Using CNC Milling Machine“. In 3D Printing and Additive Manufacturing Technologies, 73–82. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0305-0_7.

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Gurbuz, Riza. „Mechatronics Approach for Desk-Top CNC Milling Machine Design“. In Solid State Phenomena, 175–80. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908451-60-4.175.

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Svetlík, Jozef, Juraj Kováč, Patrícia Dudová, Jozef Dobránsky und Michal Považan. „Manufacturing Precision of the CNC Milling Machine with Three Controlled Axes“. In Industry 4.0: Trends in Management of Intelligent Manufacturing Systems, 87–97. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-14011-3_8.

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Suh, Suk-Hwan, und Jung-Jae Lee. „Flank Milling of Ruled Surface with Additionally-Five-Axis CNC Machine“. In Integrated Design and Manufacturing in Mechanical Engineering, 389–98. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5588-5_39.

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Abdul Hamid, Rahimah, Wan Nur Amirah Wan Muhamad, Raja Izamshah und Mohd Shahir Kasim. „Surface Roughness Analysis of Zirconia Dental Restoration Manufactured Through CNC Milling Machine“. In Lecture Notes in Mechanical Engineering, 361–71. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-9539-0_36.

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Ayala-Chauvin, Manuel, Fernando Saá, Ricardo Rodríguez, Carles Domènech-Mestres und Genís Riba-Sanmartí. „Design and Construction of a Low Cost CNC Milling Machine for Woodworking“. In Communications in Computer and Information Science, 379–90. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71503-8_29.

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Lamraoui, M., M. El Badaoui und F. Guillet. „Chatter Detection in CNC Milling Processes Based on Wiener-SVM Approach and Using Only Motor Current Signals“. In Mechanisms and Machine Science, 567–78. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09918-7_50.

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Konferenzberichte zum Thema "CNC modeller milling machine"

Kawasaki, Kazumasa, und Kazuyoshi Shinma. „Accuracy of Straight Bevel Gear by End Mill Using CNC Milling Machine“. In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34053.

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Straight bevel gears are usually manufactured with various machines and systems, and the tooth profiles are produced by grinding or machining by means of a tool with many cutting edges. In recent years, the straight bevel gear has been manufactured by an end mill using a CNC milling machine because the use of the auxiliary apparatus, special cutters, and special machine tools are not needed. Using this method, the gear manufacturing with high accuracy is important problem. In this paper, the coordinate measurement of the straight bevel gear manufactured in this method is performed and the gear accuracy is evaluated. The tooth profiles of a straight bevel gear generated by a quasicomplementary crown gear instead of a conventional complementary crown gear is introduced. For this study, first the tooth profiles of the straight bevel gear were modeled using a 3D-CAD system and the gear was manufactured by an end mill using a CNC milling machine based on a CAM process. Afterward, the coordinates of many points on the gear tooth surfaces were measured at random using a coordinate measuring machine. This coordinate measurement provides the information about the factors relation to the gear accuracy such as pressure angle, tooth angle error, root cone angle, and apex to back and so on. Therefore, the values of the above factors were estimated and were compared with the theoretical ones, respectively.

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Gelvis, Turyagyenda, Jian Guo Yang und Hao Wu. „Control of the Error Induced by Cutting Force in NC Milling Machine“. In ASME 2006 International Manufacturing Science and Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/msec2006-21134.

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This paper presents a real-time compensation system for cutting force induced error on CNC miller. Induced errors in form of deformations for individual joints of the transmission system are identified and monitored. A force dynamometer is calibrated in reference to displacement sensors to acts as an online sensor. The Relationships between superimposed forces and corresponding deformations are established. Hence able to indirectly predict the deformations in accordance with the system embedded model. Sequentially is established by duly applying regression analysis to force-displacement data obtained from the experiments. The functional dependence of error on the on the force as prerequisite of appropriation for its relationship with cutting force is modeled. The implementation of the error compensation is done through a predetermined kinematic model that predicts the error according to the online sensor value. Finally relevant error components are disregarded by intercepting the control signal with a reverse signal equivalent to the error.

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Schmitz, Tony L., John C. Ziegert, Raul Zapata und J. Suzanne Canning. „Part Accuracy in High-Speed Machining: Preliminary Results“. In ASME 2006 International Manufacturing Science and Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/msec2006-21100.

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This paper provides preliminary results from a study of the relative contributions of various error sources to overall dimensional errors in parts produced by milling operations. The error sources studied include machine geometry errors, thermal errors, controller tracking errors, and errors due to cutting forces. These error sources are modeled and measured on a modern high-speed machining CNC machining center. It is found that dynamic cutting force errors can be a significant contributor to part dimensional errors in high-speed milling operations.

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Tani, Giovanni, Raffaele Bedini, Alessandro Fortunato und Claudio Mantega. „Dynamic Hybrid Modeling of the Vertical Z Axis in an HSM Machining Center: Towards Virtual Machining“. In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84810.

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The paper describes the dynamical real-time simulation of the Z axis of a five axis machining center for high speed milling. The axis consists of a mechanical structure: machine head and electro-mandrel, a CNC Control System provided with feed drives and a Pneumatic System to compensate the weight of the entire vertical machine head. These three sub-systems have been studied and modeled by means of: • FEM modeling of the mechanical structure; • an equation set to represent the main functions of the CNC; • an equation set to represent the functioning of the Pneumatic System. These different modeling sub-systems have been integrated to obtain the entire actual dynamical behavior of the Z axis. A particular analysis was developed to represent the friction phenomena by a specific analytical model. Experimental activity was developed to test and validate the different modeling sub-systems, and other experimental tests were performed on the machining center to compare simulation outputs with experimental responses.

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Choudhary, Rohit, Sambhav, Sunny David Titus, P. Akshaya, Jose Alex Mathew und N. Balaji. „CNC PCB milling and wood engraving machine“. In 2017 International Conference On Smart Technologies For Smart Nation (SmartTechCon). IEEE, 2017. http://dx.doi.org/10.1109/smarttechcon.2017.8358577.

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Wang, Shu-yuan, Wei-min Wang und Xin Zhang. „The extension of the function of CNC milling machine—Slotting key-groove replaced by CNC milling machine“. In EM 2011). IEEE, 2011. http://dx.doi.org/10.1109/icieem.2011.6035271.

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Fuzhong, Wu. „CNC Milling Machine Spindle Characteristics Analysis by FEM“. In 2010 International Conference on Intelligent Computation Technology and Automation (ICICTA). IEEE, 2010. http://dx.doi.org/10.1109/icicta.2010.396.

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Khan, Abdul Wahid, und Wuyi Chen. „Calibration of CNC milling machine by direct method“. In International Conference of Optical Instrument and Technology, herausgegeben von Shenghua Ye, Guangjun Zhang und Jun Ni. SPIE, 2008. http://dx.doi.org/10.1117/12.807066.

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Max, Antonin, Lubos Rehounek und Tomas Keckstein. „Finite Element Analysis of a CNC Milling Machine Frame“. In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65613.

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A computer numerically controlled (CNC) milling center is a machine tool for the production of parts with planar, cylindrical and shaped surfaces. The milling center analyzed here includes an open frame — a structure resembling the shape of the letter C. The main cutting motion is performed by a tool clamped in the spindle. Secondary motion can be linear, rotary or a combination of these. Linear movements in three axes are performed by the tool by means of linear motion components (i.e. motion screws and linear guide rails). Rotary motion is performed only when the workpiece is clamped to the rotary table which is mounted on the mounting plate. The basic demands placed on the structure of a milling center include high static and dynamic stiffness during machining processes. This article is primarily aimed at evaluating the response of the frame of the CNC milling machine to the excitation caused by the fluctuation of cutting forces due to step changes in the number of engaged cutting edges. To ensure optimum machining conditions it is important to set suitable cutting conditions for a frame structure with sufficient stiffness. Unsuitable cutting conditions and low stiffness of the machine frame may lead to dimensional inaccuracies of the workpiece, to decreased quality of the machined surfaces or even to the destruction of the tool cutting edges. The aims of the study include the determination of the static deformation, modal analysis to assess the dynamic properties of the frame, and harmonic response analysis, taking into consideration the amplitudes of the loading forces specified in accordance with the recommended operating conditions of the individual tools. Finite element method (FEM) analyses of the frame were performed using MSC.Marc software. Due to the high structural complexity of the computer aided design (CAD) model, the computational model for the FEM analysis had to be simplified. Only the major structural parts and the connecting parts were meshed in detail, combining both structured and unstructured mesh. Geometrically complicated cast parts with large changes of thickness were meshed with linear tetrahedral elements (tetra4) with full integration. Rotationally symmetrical parts, plates and linear guide rails components were meshed with linear brick elements (hex8) with full integration. The overall number of elements was approximately 1,400,000. Tools, including the clamping head and the spindle, are represented by approximate meshes of brick elements. However, a detailed FEM model of the spindle and the tool would be needed for the analysis of the self-excited oscillations during machining, which is the subject of a large number of scientific publications. Increased attention was paid to the incorporation and set-up of the springs between corresponding pairs of nodes of the meshed linear motion components. As a computational model for modal and harmonic response analyses needs to be strictly linear, only linear elastic material properties and linear springs were defined in the analyses presented here.

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Pavanaskar, Sushrut, und Sara McMains. „Machine Specific Energy Consumption Analysis for CNC-Milling Toolpaths“. In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-48014.

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This paper describes our work on analyzing and modeling energy consumption in CNC machining with an emphasis on the geometric aspects of toolpaths. We address effects of geometric and other aspects of toolpaths on energy consumed in machining by providing an advanced energy consumption model for CNC machining. We performed several controlled machining experiments to isolate, identify, and analyze the effects of various aspects of toolpaths (such as path parameters, angular change, etc.) on energy consumption. Based on our analyses, we developed an analytical energy consumption model for CNC machining that, along with the commonly used input of material removal rate (MRR), incorporates the effects of geometric toolpath parameters as well as effects of machine construction when estimating energy requirements for a toolpath. We also developed a simple web-based software interface to our model, that, once customized for a particular CNC machine, provides energy requirement estimates for a toolpath given its G/M code. Such feedback can help process planners and CNC machine operators make informed choices when generating/selecting toolpath alternatives using commercial CAM software.

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