Определение технологических возможностей механической обработки по температурному критерию

V. I. Polyansky

doi:10.31498/2225-6733.36.2018.142544

Authors

V. I. Polyansky Empire of Metals LLC, Kharkiv, Ukraine

DOI:

https://doi.org/10.31498/2225-6733.36.2018.142544

Keywords:

machining, grinding, turning, grinding temperature, conditional cutting stress, processing capacity

Abstract

The results of theoretical studies of the cutting temperature at machining are given, taking into account the motion of the heat source deep into the surface layer of the workpiece and balance of the heat flowing into the forming chips and the surface layer of the workpiece. This made it possible to determine the optimum parameters of grinding (the depth of grinding and the speed of the part), taking into account the limitation on the temperature criterion and specific processing capacity. It has been found that with a relatively low specific processing capacity, it is expedient to use multi-pass grinding with an increased speed of the part, and with high specific processing capacity – deep grinding with a low speed of the part. It is shown that taking into account the motion of the heat source deep into the surface layer of the workpiece ensures a more accurate solution of this problem. It has been established that in real grinding conditions the ratio of the preset and maximum grinding temperatures can vary only within the range of 0...0,4 due to the significant excess of the maximum melting temperature of the melting temperature of the material being processed due to a significant increase in the nominal cutting stress. It has been found by calculations that at turning the cutting temperature is always less than at grinding due to the lower power consumption of the treatment (the nominal cutting stress). Therefore, the maximum cutting temperature during turning is determined to be less than the melting temperature of the material being processed. Consequently, the ratio of the preset and maximum cutting temperatures can vary between 0...1,0, i. e. within much larger limits than at grinding. This expands the technological capabilities of the turning process as compared to grinding. It has been shown that the highest processing capacity at a given temperature during turning is achieved under conditions of high-speed cutting

Author Biography

V. I. Polyansky, Empire of Metals LLC, Kharkiv

Кандидат технических наук, генеральный директор

References

Список использованных источников (ГОСТ):

Резников А.Н. Теплофизика процессов механической обработки материалов / А.Н. Резников. – М. : Машиностроение, 1981. – 279 с.

Якимов А.В. Оптимизация процесса шлифования / А.В. Якимов. – М. : Машиностроение, 1975. – 175 с.

Теоретические основы резания и шлифования материалов : учебное пособие / А.В. Якимов, Ф.В. Новиков, Г.В. Новиков, Б.С. Серов, А.А. Якимов. – Одесса : ОГПУ, 1999. – 450 с.

Новиков Ф.В. Повышение эффективности технологии финишной обработки деталей пар трения поршневых насосов / Ф.В. Новиков, С.М. Яценко // Физические и компьютерные технологии: труды 13 междунар. науч.-техн. конф. (19-20 апреля 2007 г.; Харьков). − Харьков : ХНПК «ФЭД», 2007. − С. 8-20.

Новиков Ф.В. Упрощенный расчет температуры резания при шлифовании и лезвийной обработке / Ф.В. Новиков, В.И. Полянский // Вісник Національного технічного університету «ХПІ». – Харків : НТУ «ХПІ», 2017. – № 17 (1239). – С. 87-92. – (Серія : Технології в машинобудуванні).

Сизый Ю.А. Динамика и теплофизика шлифования / Ю.А. Сизый, Д.В. Сталинский. – Харьков : ГП УкрНТЦ «Энергосталь», 2016. – 448 с.

References:

Reznikov A.N. Teplofizika protsessov mekhanicheskoi obrabotki materialov [Thermophysics of the processes of mechanical processing of materials]. Moscow, Mechanical Engineering Publ., 1981. 279 p. (Rus.)

Yakimov A.V. Optimizatsiia protsessa shlifovaniia [Optimization of the grinding process]. Moscow, Mechanical Engineering Publ., 1975. 175 p. (Rus.)

Yakimov A.V., Novikov F.V., Novikov G.V., Serov B.S., Yakimov A.A. Teoreticheskie osnovy rezaniia i shlifovaniia materialov: ucheb.posobie [Theoretical basis of cutting and grinding materials: tutorial]. Odessa, OSPU Publ., 1999. 450 p. (Rus.)

Novikov F.V., Yatsenko S.M. Povyshenie effektivnosti tekhnologii finishnoi obrabotki detalei par treniia porshnevykh nasosov. Trudy 13 Mizhn. nauk.-tehn. konf. «Fizicheskie i komp'iuternye tekhnologii» [Increase in the efficiency of the technology for finishing the details of friction pairs of piston pumps. Proceedings of 13th Int. Sci.-Techn. Conf. «Physical and Computer Technologies»]. Kharkov, 2007, pp. 8-20. (Rus.)

Novikov F.V., Polyansky V.I. Uproshchennyi raschet temperatury rezaniia pri shlifovanii i lezviinoi obrabotke [Simplified calculation of cutting temperature during grinding and blade machining]. Vіsnik Natsіonal'nogo tekhnіchnogo unіversitetu «KhPІ». Serіia: Tekhnologії v mashinobuduvannі – Bulletin of the National Technical University «KhPI». Series: Techniques in a machine industry, 2017, no. 17 (1239), pp. 87-92. (Rus.)

Sizyy Yu.A., Stalinskiy D.V. Dinamika i teplofizika shlifovaniia [Dynamics and thermal physics of grinding]. Khar'kov, GP UkrNTTS «Energostal'» Publ., 2016. 448 p. (Rus.)