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The article is devoted to the actual problem for the machine building: the development of new improvements to existing technological methods of processing, which significantly increases the wear resistance of surfaces of precision parts of machines and equipment. Information on the quality of surfaces precision parts is not always distinguished by the originality of technological solutions in the available technical literature. We mainly consider the technological capabilities of individual traditional finishing methods, which are not always provided the required wear-resistance characteristics of the machine parts and equipment surface layers. The purpose of the study is to improve the precision parts surfaces quality of machines and equipment by creating new and improving existing methods of processing and determining technological capabilities, the processes examined, taking into account the rational combination of successive operations. The rotational boring process has been improved to solve this problem. Original methods of machining have been developed, such as grinding with vibration damping, rotational honing, dosed lapping, elastic rolling, etc. The recommended technological processing methods of machines high-precision parts are progressive, both in the accuracy and quality ensuring of the surface and productivity. Rotational boring was carried out with the use of a special rotary boring head on the mod.1K62 machine. When grinding with vibro-damping is used mod.3B227 machine equipped with a special vibro-grinding head. Rotational honing is performed on the mod.3M82S machine, on which the rotary honing head is mounted, the dosed lapping is performed on the mod.2H135 and 1K62 machines equipped with special lapping heads, the elastic rolling is performed on the mod.1A730 machines, using a special designed elastic rolling head. As the processed material, Steels of grade 38ХМЮА, 30Х13, 40Х and 45 are used. Rational parameters of the examined technological operations are determined, based on the results of experimental studies, ensuring optimal parameters for the surface quality of parts. The values of the operational change in the surface quality indices (roughness, residual stress, micro hardness) are determined with the selected combination of recommended technological operations. The developed and improved methods have been successfully used in processing high-precision parts of machines in laboratory conditions and are recommended for introduction into production.

vestnik gosudarstvennogo universiteta morskogo i rečnogo flota imeni admirala s. o. makarova/vestnik gosudarstvennogo universiteta morskogo i rečnogo flota imeni admirala s.o. makarova

POPPERATIONAL CHANGE OF SURFACE LAYER QUALITY OF STEEL PARTS AFTER DIFFERENT MECHANICAL PROCESSING METHODS