Overlapping type combined forging method

Abstract

The invention relates to an overlapping type combined forging method. The overlapping type combined forging method is characterized by comprising the steps that two or more parts are overlapped and combined into a connected part, then the chipping allowance is added to the outer surface of the connected part to form a combined die forging, after combination, from the projection areas, the small forging is wrapped by the large charging, the projection area of the large forging is not increased, and the combined die forging or the connected part is separated through blanking, heating, die forging and cutting machining. By means of the reasonable combination and the selected proper separation method, forgings which cannot be subjected to combined forging in a traditional method can be forged through the combined forging method, and the combined forging application range is widened. After the overlapping type combined forging is formed, two or more forgings consume one finishing allowance jointly, and therefore material consumption is reduced. A cutting separation face can be directly used as a finish machining locating basis, and the effects of saving materials, reducing deformation force and improving the production efficiency can be achieved.

Description

technical field [0001] The invention belongs to the field of manufacturing metal mechanical parts, and relates to a metal die forging process in the early stage of forming mechanical parts, in particular to a superimposed sleeve forging process. technical background [0002] Under certain technological conditions, using the position and material of the punching and skin of the large forging to carry out (open or closed) die forging, the forging processing method of obtaining two or more die forgings of different shapes and sizes is called sleeve forging. It is usually used for the manufacture of rotary forgings, such as ring gears, rings and similar shaped forgings. [0003] There are two main types of sleeve forging processes introduced in the existing literature, namely step-by-step sleeve forging and simultaneous sleeve forging. [0004] The so-called step-by-step sleeve forging is to forge a large forging first, and then use the skin separated from the large forging (de...

AI Technical Summary

Problems solved by technology

[0015] To sum up, the existing sleeve forging process is inclusive sleeve forging, which is only used when the inner diameter of the large forging is significantly larger than the outer diameter of the small forging. If the outer diameter of the small forging is larger than the inner diameter of the large forging, sleeve forging cannot be applied. Forging process

At the same time, the existing combined sleeve forgings are separated by thermal shearing method, which is prone to deformation, requires secondary trimming, and needs to increase the correction process and secondary trimming process, that is, it needs to increase the corresponding equipment, molds and operators

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