The formation of a rail transverse profile to reduce contact loading and wear from railway rolling stock wheels is one of the main tasks of rail grinding. At present, when designing a rail grinding technology, a future rail profile contour is selected from a set of repair profiles available in a database. Frequently, the profile selected from the database is less than optimal, as it does not provide the required interaction in the wheel-rail system for a particular track section, and its formation requires excessive metal removal, which reduces the rail's lifespan. The paper proposes a new methodology for designing rail repair profiles based on a fundamentally new approach, consisting in designing rail geometric parameters at the stage of preparing the technological process of its grinding. This approach to the rail grinding technology design allows specifying a geometric profile for the certain railway track operating conditions and the worn rail condition, thus bringing metal removal from a rail head to required minimum and, as a result, increasing the service life of rails and the performance of a rail grinding train. To assess the efficiency and applicability of the proposed method for different railway track operating conditions, a comparative modelling of the existing approach in selecting a rail repair profile with the proposed approach to its design was carried out. The proposed method showed the best result in all cases.
Methodology for the formation of rail repair profiles by grinding
2023
Article (Journal)
Electronic Resource
Unknown
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