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Journal articles on the topic 'Metal-cutting machines'

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Published: 28 May 2022

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1

Kuznetsov, A. P., and M. G. Kosov. "Structural precision of metal-cutting machines." Russian Engineering Research 32, no. 5-6 (May 2012): 482–90. http://dx.doi.org/10.3103/s1068798x12050103.

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2

Kuznetsov, A. P., and M. G. Kosov. "Structural precision of metal-cutting machines." Russian Engineering Research 32, no. 11-12 (October 10, 2012): 725–29. http://dx.doi.org/10.3103/s1068798x12110111.

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3

Martynov, V. V., and P. V. Martynov. "Spindle trajectories in metal-cutting machines." Russian Engineering Research 34, no. 4 (April 2014): 246–49. http://dx.doi.org/10.3103/s1068798x14040121.

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4

Kuznetsov, A. P. "Temperature control of metal-cutting machines." Russian Engineering Research 35, no. 1 (January 2015): 46–50. http://dx.doi.org/10.3103/s1068798x15010165.

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5

Kuznetsov, A. P., V. M. Utenkov, and A. G. Shirshov. "Thermal assessment of metal-cutting machines." Russian Engineering Research 35, no. 1 (January 2015): 8–13. http://dx.doi.org/10.3103/s1068798x15010177.

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6

Kuznetsov, A. P. "Temperature control of metal-cutting machines." Russian Engineering Research 35, no. 3 (March 2015): 194–99. http://dx.doi.org/10.3103/s1068798x15030090.

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7

Maksimov, Yu V., and R. A. Musatov. "Conceptual Design of Metal-Cutting Machines." Russian Engineering Research 41, no. 2 (February 2021): 145–48. http://dx.doi.org/10.3103/s1068798x21020143.

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8

Chetverzhuk, Taras, Oleg Zabolotnyi, Viktor Sychuk, Roman Polinkevych, and Anatolii Tkachuk. "A Method of Body Parts Force Displacements Calculation of Metal-Cutting Machine Tools Using CAD and CAE Technologies." Annals of Emerging Technologies in Computing 3, no. 4 (October 1, 2019): 37–47. http://dx.doi.org/10.33166/aetic.2019.04.004.

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This paper describes a developed new method of body parts force displacements calculation of metal-cutting machine tools using combination of CAD and CAE technologies. It was carried out the analysis of analytical methods and the method of finite elements of body parts force displacements calculation of metal-cutting machine tools. On the basis of it the requirements to the method of calculation of compound errors of processing and deviations of the form of the processed surfaces due to deformations of the body parts of metal-cutting machines are established. The method of designing metal-cutting machines is grounded, which is based on mathematical modeling of different processes. It gives an opportunity to evaluate the accuracy of the machine and the impact on it of the individual assembly already in the initial stages of designing. The calculation methodology was implemented using ANSYS finite element analysis. This technique was used in the calculations on the example of high-precision lathes.
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9

Liberman, Ya L. "Efficiency of numerically controlled metal-cutting machines." Russian Engineering Research 30, no. 1 (January 2010): 81–83. http://dx.doi.org/10.3103/s1068798x10010181.

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10

Kuznetsov, A. P., and M. G. Kosov. "Structural thermophysical analysis of metal-cutting machines." Russian Engineering Research 31, no. 6 (June 2011): 599–606. http://dx.doi.org/10.3103/s1068798x11060141.

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11

Kol’tsov, A. G., and D. S. Rechenko. "Dynamic rotary balancing in metal-cutting machines." Russian Engineering Research 32, no. 2 (February 2012): 179–81. http://dx.doi.org/10.3103/s1068798x12020189.

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12

Shatokhin, S. N., and S. S. Shatokhin. "Closed hydrostatic guides of metal-cutting machines." Russian Engineering Research 34, no. 5 (May 2014): 326–29. http://dx.doi.org/10.3103/s1068798x14050128.

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13

Bushuev, V. V., A. P. Kuznetsov, F. S. Sabirov, V. S. Khomyakov, and V. V. Molodtsov. "Trends in research on metal-cutting machines." Russian Engineering Research 36, no. 6 (June 2016): 488–95. http://dx.doi.org/10.3103/s1068798x16060083.

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14

Bushuev, V. V., A. P. Kuznetsov, F. S. Sabirov, V. S. Khomyakov, and V. V. Molodtsov. "Precision and efficiency of metal-cutting machines." Russian Engineering Research 36, no. 9 (September 2016): 762–73. http://dx.doi.org/10.3103/s1068798x16090070.

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15

Zakovorotny, L. Vilor, and E. Valery Gvindjiliya. "Process control synergetics for metal-cutting machines." Journal of Vibroengineering 24, no. 1 (January 25, 2022): 177–89. http://dx.doi.org/10.21595/jve.2021.22087.

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16

Gavrilin, Alexey, Boris Moyzes, Kirill Kuvshinov, Maxim Vedyashkin, and Olga Surzhikova. "Determination of Optimal Milling Modes by Means of Shock-Vibration Load Reduction on Tool and Peak-Factor Equipment." Materials Science Forum 942 (January 2019): 87–96. http://dx.doi.org/10.4028/www.scientific.net/msf.942.87.

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Vibrodiagnostics of metal-cutting machines is an efficient method to increase reliability of all elements of the technological system «machine tool-device-instrument-detail». The development of vibrodiagnostic methods is especially important for milling metal-cutting machines which operate in intermittent cutting mode and are exposed to shock-vibration loads. One of the trends in the development of metal cutting equipment is to increase its productivity by expanding the ranges of cutting modes. Increase in the combination of cutting modes leads to increased probability of coincidence of the natural frequencies of the equipment and the frequencies of the cutting process which in its turn leads to operation of the machine equipment elements under resonance conditions. In the article we provide the results of our research aimed to develop the method to reduce shock-vibration load on tool and peak-factor equipment of milling machine. In our research we developed the technique that makes it possible to measure not only the general level of vibration, but also other parameters used for vibrodiagnostics, for example, the value of the peak factor has been developed. The method includes the development of a principle layout and of a plan for a three-factor experiment, construction and analysis of vibrational and spectral diagrams of the milling process for the assignment of optimal modes that provide machine operating at lower level of shock-vibration loads. Based on the results of the work we have come to the conclusion that it is rather promising to use the peak factor in analysis of the milling machines reliability.
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17

Enchev, P., T. Koreikov, and M. Enchev. "Geometrical accuracy of spindles of metal-cutting machines." International Journal of Machine Tools and Manufacture 37, no. 10 (October 1997): 1441–47. http://dx.doi.org/10.1016/s0890-6955(97)00010-2.

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18

Aver’yanov, O. I., I. O. Aver’yanova, and V. V. Zineva. "Effectiveness of batch machining on metal-cutting machines." Russian Engineering Research 31, no. 3 (March 2011): 276–79. http://dx.doi.org/10.3103/s1068798x11030038.

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19

Kuznetsov, A. P. "Thermal behavior of components in metal-cutting machines." Russian Engineering Research 31, no. 4 (April 2011): 351–57. http://dx.doi.org/10.3103/s1068798x11040137.

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20

Kuznetsov, A. P. "Patterns of thermal behavior of metal-cutting machines." Russian Engineering Research 31, no. 10 (October 2011): 975–84. http://dx.doi.org/10.3103/s1068798x11100157.

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21

Grigor’ev, S. N., A. P. Kuznetsov, M. A. Volosova, and H. J. Koriath. "Classification of metal-cutting machines by energy efficiency." Russian Engineering Research 34, no. 3 (March 2014): 136–41. http://dx.doi.org/10.3103/s1068798x14030058.

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22

Kuznetsov, A. P., and M. V. Kosarev. "Classification of temperature strains in metal-cutting machines." Russian Engineering Research 34, no. 4 (April 2014): 250–56. http://dx.doi.org/10.3103/s1068798x14040108.

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23

Fleischer, J., B. Denkena, B. Winfough, and M. Mori. "Workpiece and Tool Handling in Metal Cutting Machines." CIRP Annals 55, no. 2 (2006): 817–39. http://dx.doi.org/10.1016/j.cirp.2006.10.009.

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24

Istomin, A. B., A. V. Lyubimtseva, and V. O. Dmitriev. "Research of linear guides of metal-cutting machines." Glavnyj mekhanik (Chief Mechanic), no. 11 (November 1, 2020): 53–65. http://dx.doi.org/10.33920/pro-2-2011-08.

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The article discusses the guides used in metal-cutting machines. The advantages and disadvantages of sliding guides with different modes of friction and rolling guides with different types of rolling bodies are studied in detail. Recommendations for using each type of guide are given, and examples are considered.
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25

Molchanov, A. A., S. O. Vostrikov, A. G. Yagopol’skii, and N. A. Belousov. "Modal Diagnostics of Materials for Metal-Cutting Machines." Russian Engineering Research 42, no. 4 (April 2022): 387–90. http://dx.doi.org/10.3103/s1068798x22040232.

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26

Walid Ibrahim Alnusirat, Litvin Оleksandr, Ibrahim Farhan Alrefo, and Kravez Оleksandr. "TOOL FOR RESEARCHING THE DYNAMIC SYSTEM OF METAL-CUTTING MACHINE." World Science, no. 9(37) (September 30, 2018): 5–9. http://dx.doi.org/10.31435/rsglobal_ws/30092018/6128.

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Dynamic characteristics of the system flexibility of the machine affect the accuracy of machining, so the study of this problem is very important. Fluctuations of the machine elements significantly affect the error of the shape of the workpiece. The quality of the processing is determined not so much by the static displacements between the tool and the workpiece but the stability of the machine system as a whole. There are many solutions of vibroacoustic diagnostics devices for machines and machine-tools in the related publications. Defects in the spectrum of vibroacustic signals are found in the process of manufacturing and assembling machines in the form of discrete components, parameters of which are used in vibroacoustic diagnostics as informative diagnostic features. Along with that there is, but not so common, another type of dynamic system analysis of the machine, which can be carried out by experimental methods, or, in particular, by simulating the perturbation of a dynamic system by cutting forces of special type. Imitated disturbance is carried out by using a tool of a special form. During the processing cutting edges of the tool create a pseudorandom process with certain statistical characteristics, in particular, the correlation function. The proposed design of the tool makes it possible to perform the research of frequency parameters of the dynamic system of the machine without complex loading devices.
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27

Gujarathi, Mr Pratik. "Automatic Pneumatic Sheet Metal Feeding and Cutting Machine." International Journal for Research in Applied Science and Engineering Technology 9, no. 11 (November 30, 2021): 150–65. http://dx.doi.org/10.22214/ijraset.2021.38734.

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Abstract: Today in the rapid competition of the industries to get the best quality of the product in the minimum required time is the main aim of industries. To get the best quality and maximum production most advanced machines are used. But there are no facts that use only the advanced machines, to maintain their performance is real requirement of the industries, also to give proper facilities to the workers with good environmental condition and to reduce their efforts is one of the objects to achieve the best quality and high production. Sheet metal is simply a metal formed into thin and flat pieces. It is one of the fundamental forms used in metal working and can be cut and bent into a variety of different shapes. Countless everyday objects are constructed of the material. Thicknesses can vary significantly, although extremely thin thicknesses are considered foil or leaf, and pieces thicker than 6 mm (0.25 in) are considered plate. Sheet metal also has applications in car bodies, airplane wings, medical tables, roofs for buildings (Architectural) and many other things. Sheet metal of iron and other materials with high magnetic permeability, also known as laminated steel cores, has applications in transformers and electric machines. There are three primary procedures in Layout. They are Parallel, Radial, and Triangulation. The major aim to our experiment is to study about pneumatic control system, study about double acting cylinder, study about the advantage of pneumatic hand operated valve and study about high speed blade. We are using scissors for simple sheet metal cutting. It is a manual method so that sheet metals are to be wasted sometimes because of mistakes happened such as wrong dimensions etc., and also even a simple cutting may take long time. We are using a pneumatic system for sheet metal cutting in an easy way. It is operated by a pneumatic hand lever of two ways control valve. Control valve is operated by a compressor. Keywords: Pneumatic, Automation, Sheet Metal, Pneumatic, Valve, Cutting Machine
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28

Zhang, Chun Liang, and Li Ping Chen. "Real Time Monitoring of Cutting Chatter Based on Fuzzy Hidden Markov Models." Materials Science Forum 532-533 (December 2006): 1160–63. http://dx.doi.org/10.4028/www.scientific.net/msf.532-533.1160.

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The full automation of machine tools has gained substantial importance in manufacturing industries in recent years, as machining technology has progressed from manually operated production machines to highly advanced and sophisticated CNC machine tool. Whereas manufacturing technology has moved to the stage of automation, there is still an unsolved problem in metal cutting processes: cutting chatter. Due to its complexity, thus cutting chatter is still the primary problem in metal cutting processes. According to the characteristic of cutting chatter, a real time monitoring technique of cutting chatter based on fuzzy hidden Markov model (FHMM) was presented. Hidden Markov model (HMM) is a state-of-the-art technique for speech recognition because of its elegant mathematical structure and the availability of computer implementation of these models. In this paper, the fuzzy EM algorithm was used to the Baum-Welch algorithm in the HMM method, and the strategy of time frequency feature extraction to non-stability signal was described. The experimental results show that the proposed method is feasible and effective for the monitoring of cutting chatter in the metal cutting processes.
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29

Zelený, Petr, Přemysl Pokorný, and Martin Lachman. "Prototype CNC Machine for Laser Cutting of Sheet Metal." Applied Mechanics and Materials 693 (December 2014): 195–200. http://dx.doi.org/10.4028/www.scientific.net/amm.693.195.

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The research activities of the Department of Manufacturing Systems at TU of Liberec are related to projecting, designing and construction of prototype CNC machines for laser cutting. The result is a prototype device assembled of standard aluminium profiles using the motion control linear actuator with ball screw.The paper presents the design and construction of the prototype machine. The components and their assembly are described below. The implementation of technical parameters and other options outlined the continued development and application of the equipment is also listed below.
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30

Neugebauer, Reimund, Carsten Hochmuth, Gerhard Schmidt, and Martin Dix. "Energy Efficient Process Planning Based on Numerical Simulations." Advanced Materials Research 223 (April 2011): 212–21. http://dx.doi.org/10.4028/www.scientific.net/amr.223.212.

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The main goal of energy-efficient manufacturing is to generate products with maximum value-added at minimum energy consumption. To this end, in metal cutting processes, it is necessary to reduce the specific cutting energy while, at the same time, precision requirements have to be ensured. Precision is critical in metal cutting processes because they often constitute the final stages of metalworking chains. This paper presents a method for the planning of energy-efficient machining processes based on numerical simulations. It encompasses two levels of planning flexibility: process adjustment and process design. At the process adjustment level, within the constraints of existing machines and tools, numerical simulations of orthogonal cutting are used to determine cutting parameters for increased energy efficiency. In this case, the model encompasses specific cutting energy, tool wear, chip geometry, and burr shape. These factors determine the energy and resources required for the chip formation itself, tool replacements, cleaning and deburring and with that the overall energy efficiency and precision. In the context of process design, with the ability to select machines, machine configurations, tools, and cooling systems, numerical simulations of cutting processes that incorporate machine and tool conditions are applied in the planning of energy-efficient machining. The method is demonstrated for the case of drilling processes and supported by experimental investigations that identify the main influences on energy efficiency in drilling.
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31

Gavrichenko, Nikolay E., and Pavel V. Petrov. "ANALYSIS AND CLASSIFICATION OF MANUFACTURING CENTERS FOCUSED ON MECHANICAL PART OF OPTICAL DEVICES." Interexpo GEO-Siberia 6, no. 1 (July 8, 2020): 91–98. http://dx.doi.org/10.33764/2618-981x-2020-6-1-91-98.

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The article deals with the concept of flexible and dynamic classification of metal-cutting machines of the "turning processing center" (TPC) type for the production of complex metal parts of optical devices by cutting. It is intended to create specialized databases with a formalized description of the structural elements of the TPC and automatically perform multiple classifications, relying on various factors. The comprehensive analysis of machine-tool companies is made; the generalized structure of structural elements and parameters of modern TPC is defined.
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32

Barbin, A. Yu, and V. V. Molodtsov. "Motorized spindles as primary drives in metal-cutting machines." Russian Engineering Research 33, no. 8 (August 2013): 481–85. http://dx.doi.org/10.3103/s1068798x13080054.

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33

Kozochkin, M. P., F. S. Sabirov, A. N. Bogan, and K. V. Myslivtsev. "Vibrational diagnostics of roller bearings in metal-cutting machines." Russian Engineering Research 33, no. 8 (August 2013): 486–89. http://dx.doi.org/10.3103/s1068798x1308011x.

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34

Kuznetsov, A. P., and M. V. Kosarev. "Standard types of temperature deformation in metal-cutting machines." Russian Engineering Research 34, no. 5 (May 2014): 330–33. http://dx.doi.org/10.3103/s1068798x14050074.

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35

Vanin, V. A., A. N. Kolodin, and A. A. Rodina. "Kinematic structure of metal-cutting machines with hydraulic couplings." Russian Engineering Research 34, no. 12 (December 2014): 763–68. http://dx.doi.org/10.3103/s1068798x14120260.

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36

Brailovskii, M. I., A. G. Voskoboinik, A. A. D’yakonov, and I. V. Shmidt. "Optimal materials for the manufacture of metal-cutting machines." Russian Engineering Research 36, no. 10 (October 2016): 846–50. http://dx.doi.org/10.3103/s1068798x1610004x.

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37

Pereverzev, P. P., and A. V. Akintseva. "Optimal machining cycles for numerically controlled metal-cutting machines." Russian Engineering Research 37, no. 7 (July 2017): 617–21. http://dx.doi.org/10.3103/s1068798x17070206.

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38

Klenova, Irina A., Dmitry A. Rudikov, and Svetlana N. Kholodova. "NORMALISATION OF THE DRIVE PRECISION OF METAL-CUTTING MACHINES." Herald of Dagestan State Technical University. Technical Sciences 44, no. 1 (January 1, 2017): 17–25. http://dx.doi.org/10.21822/2073-6185-2017-44-1-17-25.

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39

Vernezi, M. A., A. D. Lukyanov, V. V. Dolgov, and V. V. Zotov. "About diagnostics of technical condition of metal-cutting machines." IOP Conference Series: Materials Science and Engineering 1029 (January 19, 2021): 012124. http://dx.doi.org/10.1088/1757-899x/1029/1/012124.

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40

Kuznetsov, P. M., and A. G. Yagopol’skii. "Optimizing the Idling Path of Large Metal-Cutting Machines." Russian Engineering Research 40, no. 12 (December 2020): 1081–83. http://dx.doi.org/10.3103/s1068798x20120382.

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41

Fedoreshchenko, Nikolay, and Mihail Levitin. "PRELIMINARY ANALYSIS OF THE MODERNIZATION OF METAL-CUTTING MACHINES." Bulletin of the Angarsk State Technical University 1, no. 15 (January 12, 2022): 78–81. http://dx.doi.org/10.36629/2686-777x-2021-1-15-78-81.

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The method of modernization and analysis of the choice of the electric motor are shown. It has been established that it is expedient to carry out modernization based on a feasibility study in several stages with the development and approval of technical documentation at each stage
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42

Maksarov, Vyacheslav Viktorovich, Aleksei Dmitrievich Khalimonenko, Ilya Valerievich Gorshkov, and Igor Albertovich Brigadnov. "Technological support of quality of guiding metal-cutting machines." Metalloobrabotka, no. 4 (2019): 59–67. http://dx.doi.org/10.25960/mo.2019.4.59.

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43

Zakovorotny, Vilor, and Valery Gvindjiliya. "Synergetic approach to improve the efficiency of machining process control on metal-cutting machines." Metal Working and Material Science 23, no. 3 (September 15, 2021): 84–99. http://dx.doi.org/10.17212/1994-6309-2021-23.3-84-99.

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Introduction. The efficiency of processing on metal-cutting machines is evaluated by the reduced cost of producing a batch of parts while ensuring the required quality. In modern production, parts are usually made on CNC machines. Today the CNC program and the trajectories of the machine tool actuators match each other with high accuracy, which, however, does not yet guarantee quality and efficiency of production. The definition of the CNC program is based on the knowledge base of rational modes, tools, coolant and etc. during processing. This base reflects some averaging over the set of machines, tools and processing conditions, and does not take into account changes in the properties of the dynamic system in the process of cutting. Subject. The paper deals with the synergistic matching of external control (CNC programs) and cutting dynamics (internal control). The internal control factors can be set a priori, as well as determined as a result of the influence of irreversible energy transformations in the cutting zone. The purpose of the work is to determine the law of controlling the trajectories of the machine's executive elements in such a way that, with changing properties of the dynamic cutting system, the required surface quality of the part and minimizing the intensity of tool wear are ensured during the processing of the part. Method and methodology. Mathematical simulation of the controlled dynamic system, which properties change due to the a priori set laws of variation of subsystem parameters, as well as changes in the cutting properties conditioned by the power of irreversible energy transformation is presented. Consideration of the power of irreversible energy transformations is necessary for predicting back-edge wear, changes in dynamic coupling parameters, and evolutionary restructuring of cutting dynamics. Results and Discussion. The regularity of matching the CNC program with the changing properties of the cutting process, which allows increasing the processing efficiency while ensuring the required quality of parts, is disclosed. A number of properties of the dynamic cutting system caused by changing trajectory of the longitudinal feed rate of the tool during processing of the shaft, the stiffness change of which is given, are revealed and analyzed.
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44

Zakovorotny, V. L., and V. E. Gvindzhiliya. "Synergetic Concept of Software Control of Machining Processes on Metal-Cutting Machines." Proceedings of Higher Educational Institutions. Маchine Building, no. 5 (734) (May 2021): 24–36. http://dx.doi.org/10.18698/0536-1044-2021-5-24-36.

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High precision metal-cutting machines ensure that the programmed machine actuator trajectories correspond to the real ones. For lathes these are the trajectories of the longitudinal and transverse calipers of the system, as well as the spindle. The purpose of processing is to produce parts of a given quality while minimizing the manufacturing costs. The condition of the dynamic cutting system, determined by the trajectories of forces and deformations, affects the quality indicators of parts and the cutting efficiency, which depends on the intensity of tool wear. The properties of the system change depending on the phase trajectory of the power of irreversible transformations of the energy supplied to the cutting zone by the work performed. Their changes related with the evolution of the parameters of the dynamic link formed by cutting are manifested in the development of tool wear and changes in the quality of the part. Thus, the power of irreversible energy transformations is one of the internal factors causing changes in the output characteristics of processing and the state of the process. In this regard, when processing on machine tools, there is a problem of synergistic coordination of external control (for example, the CNC program) with internal one, the source of which is the irreversible transformation of the energy supplied to the cutting zone. The article considers the problem of synergetic coordination of external and internal controls during cutting process, the solution of which will allow increasing the efficiency of processing on CNC machines. A mathematical model of a controlled dynamic cutting system and control algorithms are proposed to improve the efficiency of processing parts of a given quality while minimizing the intensity of tool wear. Testing of the developed algorithms has shown that their use reduces the cost of manufacturing parts by 1.2.
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45

Fot, A. P. "ABOUT IMPROVEMENT OF SETS OF REPLACEABLE GEARS GUITARS METAL CUTTING MACHINES." Spravochnik. Inzhenernyi zhurnal, no. 286 (January 2021): 21–25. http://dx.doi.org/10.14489/hb.2021.01.pp.021-025.

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The article is devoted to the problems of modernization of the existing fleet of metal-cutting machines. The purpose and objectives-to determine ways and practical recommendations for resource saving in the production of machine components for the manufacture of complex products. The methods used are comparative computational experiments to determine the performance characteristics of sets of replaceable gears. The presented material contains practical recommendations on the choice of evaluation indicators and improvement of sets of replaceable gears of two-pair guitars of various gear-processing machines (5B12, 5A308P, 5111 and 5K32) based on the results of research. Confirmed the possibility of improving the characteristics of kits while maintaining the number of wheels in the kits. In conclusion, it is noted that the proposed solutions contribute to an increase in the integral quality index by 1,2857 – 6,3742 times, a decrease in the total weight of the wheels of the set by 1,4824 – 3,3093 times, an increase in the number of realized gear ratios by 1,2622 – 3,7525 times, an increase in the average density of the values of the gear ratios by 1,2136 – 3,7781 times.
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46

Antipenko, V. S., Yu N. Kharitonov, and N. S. Nikolaeva. "Marketing Research of the Structure of the Total Cost of Ownership to Optimize the Choice of Machines." Quality and life 25, no. 1 (March 23, 2020): 82–86. http://dx.doi.org/10.34214/2312-5209-2020-25-1-82-86.

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For the optimal choice of metal-cutting equipment for the production of parts of various industries, in particular metal-cutting machines, various studies, including marketing, are required. Improving the quality of manufactured products is achieved by creating and selecting size ranges (ranges) of metal-cutting equipment that fully satisfy current and future consumer demands. The total cost of ownership to optimize the selection of metal cutting equipment is an element of marketing research. Optimizing your total cost of ownership will help you make the right decision when purchasing equipment.
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47

Zakovorotny, Vilor, and Valery Gvindjiliya. "Determination of optimal coordinates for switching processing cycles on metal-cutting machines." Metal Working and Material Science 23, no. 1 (March 15, 2021): 56–67. http://dx.doi.org/10.17212/1994-6309-2021-23.1-56-67.

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Introduction. One of the ways to improve the efficiency of processing on machines is to coordinate the CNC program with the changing properties of the dynamic cutting system. If this takes into account the tool wear and the associated with it changes in the parameters of the dynamic cutting system, then the cutting speed to ensure the minimum wear rate is reduced along the cutting path. The corresponding feed rate is reduced even faster, since it is necessary to ensure a constant deformation displacement of the tool relative to the workpiece. The evolution of the properties of the cutting process (for matching with which the trajectories of the operating elements of the machine are corrected) depends on the power of irreversible transformations of the energy supplied to cutting. This reduces the processing efficiency. Therefore, a new for the considered subject area problem of determining the coordinates of the tool movement relative to the workpiece is formulated, starting from which further processing is economically inexpedient. In this case, it is necessary, after processing the next part, to ensure the replacement of the tool and carry out its changeover. Subject. A metal-cutting machine of a turning group, the trajectories of the executive elements of which are controlled, for example, by a CNC system. The purpose of the work. Mathematical simulation and methods for determining the coordinates at which it is necessary to replace the tool. Method and methodology. The necessary conditions for the optimality of determining these coordinates are proved. Mathematical tools are provided that allow calculating the coordinates at which the given manufacturing costs take the minimum value according to the given trajectories. The probabilistic characteristics of evolutionary trajectories are taken into account. Results and discussions. The analysis of the efficiency of using the technique in industry depending on the cost of the machine and tool together with its replacement and readjustment is given. The proven optimality conditions and the given mathematical tools complement the knowledge about the optimization of controlled machining processes on machines. Conclusions. The results of the study show new options for the organization of tool replacement, aimed at improving the efficiency of processing by software methods using a CNC system.
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48

LEVY, D. V., and N. Y. LAKALINA. "DEVELOPMENT OF ELEMENTS OF AN AUTOMATED DESIGN SYSTEM FOR THE MAIN MOVEMENT DRIVES OF METAL–CUTTING MACHINES WITH THE FORMATION OF TECHNICAL DOCUMENTATION IN COMPASS–3D." Fundamental and Applied Problems of Engineering and Technology, no. 6 (2021): 26–32. http://dx.doi.org/10.33979/2073-7408-2021-350-6-26-32.

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The aim of the work was to develop elements of an automated design system for the main movement drives of metal–cutting machines. As automated subsystems, design modules for belt drives, couplings, gearboxes, spindle assemblies and a module for selecting an electric motor to drive the main movement of metal–cutting machines have been developed. Also, for all the developed modules, automated generation of design documentation in the Compass–3D system is provided, namely, parameterized 3D models and associative drawings of the elements of the main movement drives of metal–cutting machines. The developed automated design system will allow you to quickly calculate the elements of the main movement drives and will allow you to visualize the work by building 3D models of the elements that make up the drives, as well as quickly recalculate their parameters when the source data changes. Also, the elements of the developed automated design system can be used both in specialized educational institutions for the purpose of working out and visualizing the knowledge and skills acquired by students, and in machine–building enterprises for the purpose of approximate evaluation of design options at the stage of preliminary design of equipment. Users of the program can be students or employees of enterprises with a basic level of training in the technical direction.
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49

Kuznetsov, A. P. "Non-Stationary Temperature Behavior of Spindle Assemblies and Ball Screw Gears for High Precision Metal Cutting Machines." EPJ Web of Conferences 248 (2021): 04020. http://dx.doi.org/10.1051/epjconf/202124804020.

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Typical temperature and thermoelastic models of structures of spindle units and ball screw systems of metal-cutting machines were considered. The features of determining the geometric and thermophysical parameters of these models were described in some detail. Both analytical and numerical solutions for estimating time-dependent temperatures are presented. The solutions were obtained for thermoelastic displacements of spindles and ball screw systems for various boundary conditions and limitations of deformations during heating due to the design of these elements of metal-cutting machines.
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50

Anikeeva, Olesya, Alexander Ivakhnenko, and Oleg Erenkov. "Approaches to nonlinear theory creation for machine tools geometric accuracy." MATEC Web of Conferences 224 (2018): 01037. http://dx.doi.org/10.1051/matecconf/201822401037.

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The justification of the nonlinear theory creation in machines geometrical accuracy field is given in the work. The problems accountings of which don’t allow providing the consecutive linearization method adequacy at geometrical accuracy calculating of metal-cutting machines are considered. The potential sources of not linearities at calculating of metal-cutting systems accuracy and the sources of the nonlinear members appearance are revealed. At the same time the nonlinear members are considering the machines geometrical errors at a shaping function variation. The full variation of shaping function is defined and the accuracy nonlinear model of the lathe is constructed on the function basis. The directions of further researches in the field of the machines geometrical accuracy nonlinear theory are presented.
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