Method for regulating and controlling residual stress of high-speed rail wheel set tread through high-energy acoustic beams

Abstract

The invention provides method for regulating and controlling residual stress of high-speed rail wheel set treads through high-energy acoustic beams. The method is suitable for non-destructive reduction of wheel set tread stress. According to the method, an ultrasonic stress regulation and control system and an ultrasonic transducer are combined, so that the high-energy acoustic beams sensitive to stress is stimulated, according to high-energy ultrasonic plasticity inductive effect, high-energy ultrasonic wave dynamic energy is supplied to dislocation atoms in stress applying regions or residual stress regions so as to provide enough power, the dislocation atoms overcome resistance and slide out of crystals, so that crystal lattice distortion is reduced, and the purpose of reducing the applying stress or the residual stress is achieved. The method has an obvious effect, has no special requirements for the surface quality of the wheel set to be regulated and controlled, and is harmless to human bodies and environments, and the regulation and control time is short, the in-situ regulation and control operation can be realized, and the on-site operation is convenient and simple.

Description

1. Technical field [0001] The invention proposes a high-energy acoustic beam elimination method for the residual stress of a high-speed railway wheel set, and the method is suitable for the non-destructive control of the residual stress of the wheel set. 2. Background technology [0002] With the increasingly significant role of railway transportation in the development of the national economy, people have higher and higher requirements for the safety of railway transportation. The train wheel set is an important part of the load-carrying train operation, and it is prone to wear, cracks and peeling during operation. The damage will seriously affect the safety of train operation. Therefore, whether it is the stress produced in the manufacturing process of the wheel set or the stress produced in the work of the wheel set, it is an important subject for people to study. [0003] Literature search found that patent: (Zhang Fulin et al. Welding residual stress elimination method...

AI Technical Summary

Problems solved by technology

The effect of eliminating residual stress can be achieved by this method, but the method is complicated to operate, the accuracy is not high, and the practical application is greatly limited

Patent: (Li Bin et al. A method for eliminating residual stress in welding by ultrasonic impact and its application [P]. Chinese patent: CN102002581A, 2011-04-06) discloses a method for casting steel parts such as bolsters and side frames in Elimination of residual stress generated during repair welding. This method is suitable for temperatures ranging from 400°C to 800°C. There are many influencing factors and cannot be used for the elimination of residual stress in orbital welding.

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