Suspension spring of high-speed locomotive steering frame and manufacturing method thereof

Abstract

The invention relates to a suspension spring of an express locomotive steering frame and a manufacturing method thereof. The suspension spring consists of an inner spring and an outer spring, the inner spring is arranged in an outer spring tube, the spiral directions of the outer spring and the inner spring are opposite, the trademark of spring steels adopted by the inner spring and the outer spring is 52CrMoVGT, and the comprehensive performance index of the spring steels is superior to that of 52CrMoV. The manufacturing method for the suspension spring comprises the main steps: selecting materials, making flat ends, polishing and heating, winding, strengthening and shot blasting treatment, spraying paint and the like. The manufacturing method adopts the 52CrMoV4GT spring steels of a high-strength material to improve the elasticity fade resisting performance of the spring, namely, improve the capabilities of resisting relaxation and creep deformation of the spring. The materials are subjected to fault detection before winding, and subjected to transverse wave ultrasonic inspection for the first time. A spring product is subjected to magnetic particle inspection before leaving a factory so as to effectively ensure the using reliability. The spring is subjected to shot blast clear-up and shot blast reinforcement so as to improve the pressure stress of the surface, eliminate thetension stress of an inner ring and greatly improve the fatigue endurance of the spring.

Description

technical field [0001] The invention relates to a suspension and damping device of a high-speed locomotive bogie, in particular to a high-speed locomotive bogie suspension spring and a manufacturing method thereof, belonging to the technical field of rail vehicle bogies. Background technique [0002] In the high-speed locomotive bogie structure, the axle box and the frame form a suspension structure through guide posts, elastic positioning sleeves, positioning seats, springs (outer springs), springs (inner springs), adjusting gaskets, support rings, and buffer pads. As a key component of vibration and noise reduction for high-speed locomotives - bogie springs, its performance determines the safety, stability, comfort, low noise, etc. of the operation, and plays a key role in the performance of the train. The main functions of the bogie spring are: [0003] (1) Support the entire weight of the bogie, body and passengers (or cargo). [0004] (2) Ensure that the deflection of...

AI Technical Summary

Problems solved by technology

[0008] In recent years, the running speed of railways has been continuously increased, from the original 60km / h to more than 200km / h, and the requirements for the production of bogie springs are getting higher and higher. Traditional springs cannot meet the requirements of high-speed locomotives.

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