On-board Modification Method of Train Tread

Abstract

The invention discloses a train tread onboard shaping method, and belongs to the field of rail vehicle wheel shaping methods. The method comprises the following steps that vehicle-mounted tread shaping devices with grinding functions are additionally arranged near all wheels of a train for polishing and shaping wheel treads in the train running process, the train running state is divided into a common braking state and a high-speed steady-state running state, and specific corresponding grinding control periods and methods under different vehicle running states are specifically provided. According to the method, the wheel lathing cycle is prolonged, the circulation efficiency of a vehicle is improved, the vehicle operation and maintenance cost is reduced, and the method can effectively alleviate the inherent problems of progress batch concentration, large-quantity personnel and equipment requiring and large labor intensity of existing wheel lathing operation, and therefore shortens thetrain maintenance cycle, saves energy and improves the economic benefits.

Description

technical field [0001] The invention belongs to the field of rail vehicle wheel shape modification methods, and in particular relates to a vehicle-mounted shape modification method for train treads. Background technique [0002] When a rail train passes through a curved line, the wheel tread will accumulate plastic strain under the action of longitudinal and lateral creep forces, which will induce fatigue cracks on the surface of the tread, and under the condition of wet and slippery rail surface, fatigue cracks are more likely to occur and expand, and then form Wheels stripped. The wear between the wheel tread and the rail increases with the mileage of the train, which will lead to an increase in the equivalent taper of the wheel tread, and may also cause a series of problems such as tread concave wear and wheel polygon wear. [0003] The wheel maintenance of existing high-speed EMUs is mainly based on daily inspection and regular turning repair. During the daily inspectio...

AI Technical Summary

Problems solved by technology

[0008] In order to solve problems such as abnormal wear of existing train treads, polygonal wheels, abnormal wheel-rail vibration, and wheel-rail noise, slow down the growth rate of equivalent taper of wheel treads, avoid contact fatigue and other damage problems of wheel treads, and prolong the maintenance cycle of wheel turning, solve the problem of In the repairing and maintenance of wheels, a large number of personnel and repairing equipment are required, the labor intensity is high, the production cost is high, and the optimal allocation of human and material resources and energy utilization efficiency cannot be obtained; and the existing repairing method according to the operation plan cannot timely The technical problem of timely turning and repairing individual wheels with occasional surface contact fatigue, the invention provides a method for modifying train treads on-board