A kind of forging forming process of subway vehicle bearing seat

Abstract

The invention provides a forging molding process for a bearing seat of a metro vehicle and belongs to the field of forging. The forging molding process comprises the following steps of 1, blanking, wherein raw materials are selected according to product requirements; 2, blank production, wherein the raw materials are heated through first flames, so that oxide skin is removed, and a blank is produced on a one-ton hammer through a blank production mold; 3, pre-bending, wherein the blank is heated through second flames, pre-bending is conducted in a preparing-for-bending mold cavity of a two-station mold on a 1600-ton friction force machine, so that the oxide skin is removed; 4, molding, wherein finish forging for molding is conducted in a finish forging mold cavity of the a two-station mold;and 5, flash cutting, wherein flashes on a forged piece obtained after the finish forging for molding are cut off through a flash cutting machine. By means of the forging molding process, the problems that according to traditional technological methods, free forging is adopted for blank production, a five-ton mold forging hammer is adopted for mold forging molding, so that blank production is notconducted precisely, the folding phenomenon is caused in the mold forging process, and corners are in short shot after mold forging is completed are solved; the scrap rate of the forged piece is greatly lowered; and the product production quality cost is saved.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a forging forming process of a bearing seat of a subway vehicle. Background technique [0002] A bearing seat is usually used in subway vehicles. The bearing seat is an important supporting element on the bogie and is mainly used to support the bearing. The shape of the product of the present invention is small at both ends and not on the same axis, and the middle is U-shaped and large. The shape of the foot, the metal flow is difficult during the forging process, and it is difficult to form. [0003] The traditional process method adopts the method of free forging to make blanks, and performs die forging on a 5-ton die forging hammer. Often, due to inaccurate blank making, folding cracks appear in the die forgings, and there are defects in the corners of the forgings after die forging because they are not punched. , causing the problem of high product scrap rate. In addition, ...

AI Technical Summary

Problems solved by technology

[0003] The traditional process method adopts the free forging method to make blanks, and performs die forging on a 5-ton die forging hammer. Often, due to inaccurate blank making, folding cracks appear in the die forgings, and there are defects in the corners of the forgings after die forging due to lack of punching. , causing the problem of high product scrap rate

In addition, a 5-ton hammer die forging is used for die forging. Because the die is subject to a large impact force, the die is prone to damage, the service life of the die is low, and the manufacturing cost is too high.

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