Hot forming process of train wheel with large difference in rim-plate spacing of anti-spoke plate

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 thermoforming technology, and in particular, the invention relates to a train wheel thermoforming process with a large difference between the rim and plate spacing of a reverse-spoke plate. Background technique [0002] The inner and outer sides of conventional train wheels are nearly symmetrical with respect to the spokes, and the distance between the rims of the opposite spokes is greatly different. [0003] The existing mainstream hot forming process for integrally rolled steel wheels consists of four steps: preforming, forming, rolling, and bending. Wheel rolling is done on a 9-high vertical rolling mill, and it is beneficial to rolling and forming if the distance between the inner and outer rims of the wheel is symmetrical or the difference is small. [0004] Large discrepancy between the rims of the reverse-spoke plates The discrepancy of the rims of the train wheels is too large, and t...

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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