Dimensional Analysis of Technological Processes for Reconditioning Machine Parts

Reconditioning of worn-out machine components is a significant reserve for improving the efficiency of repair production. Recovery technologies are necessary not only to extend the service life of machine components, they also can improve the efficiency of machine operation. The greatest costs of the repair complex resources are associated with the restoration of the size, spatial deviations, shape and roughness of worn surfaces. With that the operational properties of surfaces corresponding to their functional purpose, are formed simultaneously and first of all, wear resistance and antifrictionality. The key methods of dimensional reconstruction of machine parts are systematized. The required geometric accuracy of the surfaces being restored is obtained by sequential approximation as the operations and stages of the restoration processing are performed. Saving material and labor resources of the repair complex can be ensured by the proper selection and control of the interoperative dimensions obtained at various machining steps. Therefore, along with the study of the physical and technological capabilities of restoration methods, the dimensional analysis of technological processes with a reasonable allowance setting for operating steps of processing the restored surfaces, the thickness of the applied coatings, their final and intermediate values, the size of additional repair parts, etc. becomes relevant. Methods of dimensional restoration of parts by the type of technological impacts are considered. The article describes methods for determining the optimal part dimensions at the stages of preparation for dimensional restoration, intermediate and final dimensions during processing operations, as well as the thickness of the applied coatings, which reduce energy, material and labor costs and improve the quality and operational properties of the restored parts.

References

[1] Zolotarev A.V., Kondakov A.I. Characteristic defects of metallurgical equipment parts and technological provision for their repair an example of continuous casting machines. Spravochnik. Inzhenernyy zhurnal s prilozheniem [Handbook. An Engineering Journal with Appendix]. 2013, no. 11, pp. 38–42 (in Russ.).

[2] Sidorov V.A., Oshovskaya E.V. Special aspects of break-down emergence and revealing in metallurgic machines. Zakhist metalurgiynikh mashin vid polomok: mizhvuz. Temat. zb. nauk. pr. [Protecting Metallurgic Machines from Breakdowns. Interacademic Coll. Works.]. Mariupol’, 2000, no. 5, pp. 14–19 (in Russ.).

[3] Kasatkin N.L. Remont i montazh metallurgicheskogo oborudovaniya [Repair and assembling of metallurgic equipment]. Moscow, Metallurgiya publ., 1970. 312 p.

[4] Bobrov V.V., Kovalenko V.D., Mikhaylus’ A.S., Moyseyenko I.I., Potapov V.S., Sichevoy A.P. Uluchshenie ekspluatatsionnykh svoystv detaley prokatnogo oborudovaniya [Improving exploitation properties of rolling equipment parts]. Kiev, Tekhnіka publ., 1988. 158 p.

[5] Zolotarev A.V. Scientific and methodological base for technology provision of continuous casting rollers operational properties at repair. Handbook. An Engineering Journal with Appendix, 2014, no. 12, pp. 39–45 (in Russ.).

[6] Suslov A.G., Dal’skiy A.M. Nauchnye osnovy tekhnologii mashinostroeniya [Scientific basis of machine building technology]. Moscow, Mashinostroenie publ., 2002. 684 p.

[7] Suslov A.G. Kachestvo poverkhnostnogo sloya detaley mashin [Surface layer quality of machine parts]. Moscow, Mashinostroenie publ., 2000. 320 p.

[8] Tekhnologicheskoe obespechenie i povyshenie ekspluatatsionnykh svoystv detaley i ikh soedineniy [Engineering support and improving exploitation properties of parts and its assemblies]. Ed. Suslov A.G. Moscow, Mashinostroenie publ., 2006. 448 p.

[9] Vosstanovlenie detaley mashin [Machine parts recovery]. Ed. Ivanov V.P. Moscow, Mashinostroenie publ., 2003. 673 p.

[10] Repair and maintenance weld overlay solutions for steel mills. Available at: https://pdfslide.net/reader/f/repair-and-maintenance-weld-overlay-solutions-for-and-maintenance-weld-overlay (accessed 15 December 2020).

[11] Leshchinskiy L.K., Samotugin S.S. Sloistye naplavlennye i uprochnennye kompozitsii [Layered welded and strengthened compositions]. Mariupol’, Novyy mir publ., 2005. 392 p.

[12] Ivanov V.P., Stepnova Yu.A. Improving the technology of surfacing heterogeneous working layer on hot rolling bulky rolls. Reporter of The Priazovskyi State Technical University. Section: Technical Sciences, 2015, no. 31, pp. 98–105 (in Russ.).

[13] Matthews S., James B. Review of thermal spray coating applications in the steel industry. Part 1 — Hardware in steel making to the continuous annealing process. J. Therm. Spray Tech., 2010, vol. 19, no. 6, pp. 1267–1276, doi: https://doi.org/10.1007/s11666-010-9518-8

[14] Kay C.M. Thermal spray applications in the steel industry. ASM handbook. Vol. 5A. Thermal spray technology. ASM International, 2013, pp. 324–327.

[15] Schneider K.E., Belashchenko V., Dratwinski M., Siegmann S., Zagorski A. Thermal spraying for power generation components. Wiley, 2006. 271 p.

[16] Sitnikov A.A., Sobachkin A.V., Kamyshov Yu.N. Design of engineering processes for manufacturing and repair of parts with wear-resistant coatings. Science Intensive Technologies in Mechanical Engineering, 2019, no. 2, pp. 29–36 (in Russ.).

[17] Kharlamov Yu.A. Computation method for coating thickness. Svarochnoe proizvodstvo, 1987, no. 9, pp. 9–11 (in Russ.).

[18] Trifonov G.I., Zhachkin S.Yu. Thickness of plasma-sputtered coating on a detail. Sovremennye materialy, tekhnika i tekhnologii, 2018, no. 1(16), pp. 77–82 (in Russ.).

[19] Kharlamov Yu.O., Klimenko S.A., Budag’yants M.A., Polons’kii L.G. Obrobka detaley pri vіdnovlennі і zmіtsnennі [Parts processing at recovery and strengthening]. Lugans’k, Vid-vo SNU іm. V. Dalya publ., 2007. 500 p.

[20] Dianov A.A. Tekhnologicheskoe obespechenie kachestva detaley s iznosostoykimi pokrytiyami za schet upravleniya parametrami tochnosti osnovy i pokrytiya. Avtoref. Kand. Diss. [Technological ways to provide quality of parts with wear-resistance coatings by controlling accuracy parameters of base and coating. Abstract Cand. Diss.]. Barnaul, AltGTU im. I.I. Polzunova publ., 2010. 16 p.

[21] Shorshorov M.Kh., Kudinov V.V., Kharlamov Yu.A. State and prospects of coatings sputtering development. Fizika i khimiya obrabotki materialov, 1977, no. 5, pp. 13–24 (in Russ.).

[22] Kharlamov Yu.A., Borisov Yu.S. Effect of surface micro-relief on adhesion strength with gas-thermal coatings. Avtomaticheskaya svarka, 2001, no. 6, pp. 19–25 (in Russ.).

[23] Lishchenko N.V., Larshin V.P., Makarov S.N. Analysis of methods for determining the allowances for machining. Trudy Odesskogo politekhnicheskogo universiteta, 2011, no. 1(35), pp. 38–44 (in Russ.).

[24] Burykin V.V. Finishing processing technology for rolling mills, recovered by welding deposition. Otkrytye informatsionnye i komp’yuternye integrirovannye tekhnologii, 2018, no. 80, pp. 91–99 (in Russ.).