Determination of the optimal strength of contact interaction of the tool and the part during finishing-hardening treatment by diamond smoothing

The main factors of the process of diamond smoothing are considered in the work: the force of the contact interaction of the tool and the part in the deformation zone and the friction on the contact surface of the part and the smoother. The technique of analytical determination of the optimal smoothing force for the finishing-hardening treatment mode is presented. The calculated values were obtained for some characteristic grades of materials of small and medium hardness (≤ 210 HB, indenter radius 3.4 mm) and a number of hardened steels of high hardness (indenter radius 2.0 mm). The force values are also determined using expressions for the deformation component of the friction coefficient. A comparative analysis of the results indicates that the calculation options are adequate for practical purposes. On specific examples of processed materials, graphical dependencies are shown, which reflect the relationship between the coefficient of friction, including its deformation component, and the smoothing force. With an increase in the leveling force, the friction coefficient increases, this is explained by an increase in the depth of penetration of the diamond tip and, consequently, an increase in the deformation component. The depth of penetration of the indenter into the surface to be treated, and therefore the coefficient of friction during ironing, depends on the hardness of the material being processed. With increasing hardness, the penetration depth decreases, which leads to a decrease in the deformation component and in general the coefficient of friction. The friction coefficient is also affected by the radius of the working part of the tool, since the indenter penetration depth also depends on its value. The research results can be used in the development of technology for finishing and hardening diamond smoothing, the development of the process and its introduction into production.

diamond smoothing, finishing hardening mode, smoothing power, coefficient of friction

1. Smelyanskii V. M. Mechanics Hardening the Details of the Surface-Plastic Deformation. Moscow, Mashinostroenie Publ., 2002. 300 p. (in Russian).

2. Bobrovskii N. M. Development of the Scientific Basis for the Processing of Parts by Surface-Plastic Deformation without the use of Lubricant-Coolants. Togliatti, Togliatti State University, 2008. 170 p. (in Russian).

3. Gubanov V. F. Smoothing: Quality, Technologies, Tools. Moscow, Publ. House of the Academy of Natural Sciences, 2013. 70 p. (in Russian).

4. Odincov L. G. Hardening and Finishing of Parts by Surface Plastic Deformation. Moscow, Mashinostroenie Publ., 1987. 328 p. (in Russian).

5. Chepa P. A., Andriyanin V. A. Berestnev O. V., ed. Performance Properties of Hardened Parts. Minsk, Nauka i tekhnika Publ., 1988. 192 p. (in Russian).

6. Gurov R. V. Methodology of designing operations for finishing and hardening processing of machine parts by surface-plastic deformation. Vestnik Brestskogo gosudarstvennogo tekhnicheskogo universiteta [Bulletin of the Brest State Technical University], 2010, no. 4 (28), pp. 17–23 (in Russian).

7. Blumenstein V. Y., Makhalov M. S. Investigation of residual stresses of the surface layer in the processes of surface plastic deformation. Vestsi Natsyyanal’nai akademii navuk Belarusi. Seryya fizika-technichnych navuk = Proceedings of the National Academy of Sciences of Belarus. Physical-technical series, 2015, no. 3, pp. 41–48 (in Russian).

8. Mel’nikov P. А., Bobrovskii N. M. Optimization parameters of the smoothing process in production conditions in order to obtain a surface suitable for work in conditions of hydrodynamic friction. Vektor nauki TGU [Science Vector Togliatti State University], 2011, no. 2 (16), pp. 65–67 (in Russian).

9. Titov V. A., Titov A. V. Increasing the life of titanium alloy products by diamond smoothing. Kuznechnoshtampovochnoe proizvodstvo [Forging and Stamping Production], 2010, no. 4, pp. 18–24 (in Russian).

10. Ryazanova-Khitrovskaya N. V., Pyzhov I. N., Kryukova N. V. Some ways to improve the efficiency of the diamond smoothing process. Visoki tekhnologii v mashinobuduvanni [High-Technologies in Mechanical Engineering], 2015, issue 1 (25), pp. 173–182 (in Russian).

11. Chepa P. A. Performance properties of hardened parts. Minsk, Nauka i tekhnika Publ., 1988. 192 p. (in Russian).

12. Otenii Y. N., Privalov N. I., Shchegolev N. G., Murav’ev O. P., Tkacheva Yu. O. Features of forming the depth of hardening when processing parts by surface-plastic deformation. Mezhdunarodnyi zhurnal prikladnykh i fundamental’nykh issledovanii. Tekhnicheskie nauki [International Journal of Applied and Fundamental Research. Technical Science], 2016, no. 12, pp. 452–455 (in Russian).

13. Torbilo V. M. Diamond Smoothing. Moskow, Mashinostroenie Publ., 1972. 105 p. (in Russian).

14. Kragielskii I. V. Friction and Wear. Moskow, Mashinostroenie Publ., 1968. 480 p. (in Russian).

15. Mihin N. M. Plastic Contact Friction. Moskow, Nauka Publ., 1968. 104 p. (in Russian).

16. Skiba Y. V., Pushnin V. N., Kornev D. Yu., Parts K. A. Technological features of the formation of surface layer quality parameters for diamond smoothing under integrated processing conditions. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) [Metal Processing (Technology, Equipment, Tools)], 2015, no. 3 (68), pp. 31–41 (in Russian).