CONDITIONS AND OPERATING MODES OF THE PROCEDURE SPECIFICATION OF POLYMER PARTS OIL-FILLING PROCESS

A large number of polymer parts, used in railway transport, operating in difficult conditions, significantly wear off caused by conditions in open friction units, having dust loading and other contamination without any liquid lubrication. Existing technologies, used for solving this problem, aimed at making just the material of the part, which results in a change in the operational properties of the whole part, but there is no technology that will be useful in changing the operational properties of the surface layer itself. In order for a decision to be adopted on, a new procedure specification is being developed to improve the performance characteristics of ready-made polymer parts. This technology consists in filling their surface layer with an oil mixture to a given depth of approved wear. One of the most important stages in the development of this technological process is the determination of various conditions and operating modes necessary to ensure the parameters of this operating procedure. For that purpose, the objective function of two parameters is formed in the work. In this paper, the criteria for evaluating the parameters of the specification procedure of oil filling are determined. The analytical calculations and experimental studies are performed for the boundary delimination of the parameters and temperature limits for the application of the filling mixture based on the temperature of its boiling and evaporation of hexane. Due to certain initial and boundary conditions, the recommended operating modes for performing the specification procedure of oil filling are determined. The result of the work was the determination of the specific boundaries of the objective function of two parameters and the order of the stages of the procedure, which allows ensuring its stability and performance.