Authors: A.A. Kleptsov

Title of the article: Method for definition of the parameters of surface layer based on functionality of parts

Year: 2019, Issue: 1, Pages: 22-28

Branch of knowledge: Mechanical-engineering technology

Index UDK: 658.512.22

DOI: 10.26730/1999-4125-2019-1-22-28

Abstract: The task of improving the reliability of parts is solved in the direction of obtaining the characteristics of their surface layer which ensure the highest possible wear resistance. It does not take into account issues of ensuring the specified accuracy of parts. Tolerances on the accuracy of the machine, set on the basis of its func-tionality, are divided into tolerances for the manufacture of the machine and wear tolerances. At the same time, in order to increase the reliability of products, they strive for the greatest possible tolerance for wear, increasing the accuracy of parts manufacturing. As a result, the cost of manufacturing and repairing the machine unneces-sarily increases. The dependence of the rate of wear of parts on the roughness and hardness of their surfaces is extreme; therefore, the determining the parameters of the surface layer of the parts is an optimization task. The use of the wear rate of rubbing surfaces of the interfaces of parts is justified as an optimization criterion; the selection of control variables is made. The technique and algorithm for assigning the parameters of the surface layer, providing a minimum rate of wear of the mating surfaces of parts for different friction conditions, are pre-sented. To solve this problem, a random search method was used. The method for calculating the tolerances for the manufacture and wear of mated parts operating under friction conditions is proposed. An example of using the proposed methodology to solve a real project problem is reviewed.

Key words: w surface layer wear resistance tolerance wear rate hardness roughness friction

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