Hot forming process of train wheel with large difference between reverse spoke plate and rim plate distance

Abstract

The invention discloses a hot forming process of a train wheel with a large difference between reverse spoke plate and rim plate distance. The hot forming process comprises a preforming working step,a forming working step, a rolling working step and a bending working step; a forming blank is rolled by a left spoke plate roller matching with a right spoke plate roller in the rolling working step;the right spoke plate roller includes a first working surface of a right roller and a second working surface of the right roller, the first working surface of the right roller contacts with the forming blank, the second working surface of the right roller is spaced with the forming blank, so that metal flow towards the outside of the rim surface. According to the hot forming process of the train wheel with the large difference between reverse spoke plate and rim plate distance, in rolling process, large gap is left between the right spoke plate roller which is far from the deep rim plate and the forming blank, so that the metal can slowly flow to the outer rim, the possibility of outer rim surface folding is reduced, and the passing rate of hot forming of train wheels is improved.

Description

technical field [0001] The invention belongs to the technical field of train wheel thermal forming technology, in particular, the invention relates to a thermal forming process of a train wheel with a large difference between the rim and plate spacing of anti-spoke plates. Background technique [0002] The inner and outer sides of conventional train wheels are almost symmetrical with respect to the spoke plate, and the rim-plate distance of the anti-spoke plate is very different. The outer rim-plate distance of the train wheel reaches 94mm, and the inner hub is super long and the length of the inner hub is 127mm. [0003] The existing mainstream thermoforming process of integral rolled steel wheels consists of four steps: preforming, forming, rolling, and bending. Wheel rolling is completed on a 9-high vertical rolling mill, and the distance between the inner and outer rims of the wheel is symmetrical or the difference is small, which is conducive to rolling forming. [000...

AI Technical Summary

Problems solved by technology

[0004] Large difference in the rim-to-plate distance of the anti-spoke plate The difference in the rim-to-plate distance of the train wheel is too large, and the difference in the rolling deformation zone between the inner and outer sides of the spoke plate leads to rolling instability, which is prone to defects, and the outer rim surface of the wheel in cold state will be folded and the rim will appear. Defects of the throat groove, such as Figure 5 shown

Moreover, the inner hub surface and the outer rim surface are required to be filled at the same time in the forming step, which is difficult to process

According to the existing rolling method, only 87% of train wheels with large differences in anti-spoke plate and rim plate pass rate are produced, and a large number of defects such as folded outer rim surface and rim throat folded defects are produced.

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