Research of the Influence of the Physical and Mechanical Properties of the Workpiece Material on the Temperature Field of the Turning Process

Abstract:

To predict the parameters of the quality of the processed parts and the period of durability of the cutting tool, mathematical models are needed that will allow us to calculate not only the mathematical expectation of the parameters of the machining process, but also the dispersion of these parameters. The working capacity of the tool and the quality parameters of the parts depend significantly on the temperature on the contact surfaces of the tool, as well as on the surface of the workpiece. Mathematical dependences for calculating the components of the total heat generation capacity during turning are given. It is assumed that the yield stress, which determines the cutting and friction forces on the contact surfaces of the cutter, workpiece and chip, depends on the temperature in the area of plastic deformation. The heat transfer at the boundaries of objects in contact with the process fluid or air is given in the form of the Newton-Richman law. The equations of thermal conductivity of contacting objects were solved together with the general boundary conditions in the contact zone, using the finite element method. The results of numerical simulation of the main component of the cutting force and temperatures in the contact zones of the face of the cutter with the chips and the fiank surface with the workpiece, depending on the yield strength of the workpiece material, are presented. The values of fluctuations in the cutting force and contact temperatures depending on the spread of the yield stress of the workpiece material during turning of workpieces made of 45 and 12X18H10T steels are determined. Based on the results of numerical modeling, regression equations are obtained for calculating the tangential component of the cutting force, the temperatures on the face and flank surfaces of the cutter, and the temperature on the surface of the workpiece.

• Periodical: Materials Science Forum (Volume 1037)
• Pages: 300-308
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1037.300
• Online since: July 2021
• Authors: Alexander N. Unyanin, Pavel R. Finageev*
• Keywords: Numerical Simulation, Temperature, Thermal Physics, Turning

References

[1] Abhang L.B, Hameedullah M. Chip-Tool Interface Temperature Prediction Model for Turning Process, International Journal of Engineering Science and Technology, Vol. 2 (4) (2010) 382 – 393.

[2] O'Sullivan D., Cotterell M. Temperature measurement in single point turning, Journal of material processing technology Vol. 118 (2001) 301-308.

DOI: 10.1016/s0924-0136(01)00853-6

[3] Vorontsov A L 2016 Initial provisions and critical remarks on modern methods of theoretical research of thermophysical processes (Handbook. Engineering journal with an app. Application № 3(228)) 2 – 8.

[4] Dragunov Yu G, Zubchenko A S, Kashirsky Yu V, Degtyarev A F, Zharov V V, Koloskov M M, Orlov A S, Skorobogatykh V N 2014 Handbook of steels and alloys. 4th ed., reprint. and add, ed Yu G Dragunov and A S Zubchenko (Moscow) p.1216.

[5] Unyanin A.N., Khusainov A.S. The ultrasonic grinding process temperature field study, MATEC Web of Conferences. Vol. 129 (2017).

DOI: 10.1051/matecconf/201712901011

[6] Koldaev V D Numerical methods and programming: textbook edited by L G Gagarina (Moscow: Infra-M) (2009).

[7] Reznikov A N, Reznikov L A. Thermal processes in technological systems. (Moscow: Mashinostroenie) (1990).

[8] Reznikov A N, Thermophysics of processes of mechanical processing of materials (Мoscow: Mashinostroenie) (1981).

[9] Vorontsov A L, Sultan-Zade N M, Albagachiev A Y, Vestnik mashinostroeniya Development of a new cutting theory. Practical calculations of cutting parameters during turning № 7 (2008) 67 – 76.

DOI: 10.3103/s1068798x08090116

[10] Vorontsov A.L, Sultan-Zade N.M, Albagachiev A.Y, Vestnik mashinostroeniya Development of a new cutting theory. Mathematical description of the formation of chips of different types, pulsation of cutting forces and contact parameters of the machined surface of the workpiece with the back surface of the cutter № 7 (2008) 56 – 61.

DOI: 10.3103/s1068798x08070101

[11] Kiselev E S, Kovalnogov V N. Mechanical processing of workpieces under conditions of critical heat and mass transfer. – (Moscow: RAS,) (2008).

[12] Vorontsov A L, Guide. Engineering journal with an app. Application Practical calculations of the cutting temperature. Part 1. № 2 (239) (2017)14 – 23.

[13] Unyanin A N, Finageev P R 2018 The research of a temperature field when turning with vibrations superposition (Science Vector of Togliatti State University № 3 (45) (2018) 63 – 69.

DOI: 10.18323/2073-5073-2018-3-63-69

[14] A.N. Unyanin, P.R. Finageev, Numerical simulation of turning contact temperatures with varying material yield strength and tool wear, IOP Conf. Series: Materials Science and Engineering, V 791 (2020) 022036.

DOI: 10.1088/1757-899x/971/2/022036