Authors: S.A. Zaydes, M.V. Fedorov, M.V. Grechneva

Title of the article: Technology of restoration of the supporting surface of the side frame of a freight car without thermal impact

Year: 2022, Issue: 6, Pages: 14-23

Branch of knowledge: 05.02.08 Engineering Technology

Index UDK: 629.4.027.23

DOI: 10.26730/1999-4125-2022-6-14-23

Abstract: Relevance of the work: The article presents the results of work on extending the service life of the side frames of a freight car, withdrawn from the working capital due to the extreme wear of the support surface of the axle opening.
The purpose of the work: To develop a technology for restoring the support surface of the side frame of a freight car, with the remaining height of the tide less than 0.5 mm and the presence of local groove-like recesses into the frame body with a depth of more than 2 mm, without temperature exposure, excluding temperature stresses and deformations in the inner opening R55. To select a material that meets all the necessary technological and operational properties, eliminating further wear of the base metal and the formation of fatigue cracks.
Research methods: To determine the tribological properties, as well as the feasibility of using a metal-filled polymer as a repair material, laboratory studies were carried out on a friction machine. The analysis of the effectiveness of the use of metal-filled polymer was made on the basis of controlled operational tests on the ring routes of the East Siberian Railway.
Results: The use of a metal-filled polymer makes it possible to extend the service life of side frames withdrawn from the revolving fund. When restoring a worn support surface, the applied metal-filled polymer forms a smooth surface for setting the axle box without distortions, and during operation combines strength and plastic properties, which ensures the safety of the trolley along the rail track.

Key words: freight car side frame support surface wear metal-filled polymer friction machine friction coefficient

Receiving date: 01.11.2022

Approval date: 01.12.2022

Publication date: 27.12.2022

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