Development and use of specialized software for determination of parameters of variation series of data on linear wear of spline joint parts

Abstract

For typical mating elements of machines (smooth cylindrical mating, spline mating, mating with gear wheels, etc.) which are in operation, a parameter may be selected which value characterizes the technical condition of the element, and for its control there are reasonable method and means of measurement. Such parameter is often the wear of parts (linear or weight wear). This paper discusses the results of studying the technical condition of the parts of a typical spline joint regarding the parameter of the width of its groove and set the parameters of its distribution in a statistically significant sample. To simplify and automate the monitoring of technical condition, a software application (in Python language) was developed which allowed the array of input data on the wear of oil pump shaft splines of tractors of “Kirovets” type (K-700A, K-701) by thickness, make a statistical series and predict the most probable value of the specified parameter. Wear of spline joint parts occurs due to the presence of errors in the manufacture of elements and assembly of the spline joint itself, profile errors in the location of its elements in space, as well as due to the uneven impact of dynamic alternating loads on the splines. To quickly and qualitatively carry out diagnostics of the parts, solve problems of forecasting of technical condition of machine elements, determine optimum control time and optimum permissible values of wear parameter, calculate consumption of spare parts, etc., it is necessary to know the most probable values of the specified parameters, thus it is most expedient to use methods of computer modeling.