Labor-saving thinning stretching method adopting rolling shaft structure

Abstract

The invention discloses a labor-saving thinning stretching method adopting a rolling shaft structure. A stretching piece moves downwards along with a stretching punch, the stretching piece enters an annular working belt from a stretching piece channel, firstly the stretching piece makes contact with a cylindrical rolling shaft and starts to be meshed with the cylindrical rolling shaft, and the cylindrical rolling shaft can generate and keep rotating in a groove due to the friction force between the stretching piece and the cylindrical rolling shaft along with the increase of the meshing area. And in the subsequent deformation process, the rolling shaft and the feeding movement of the stretching piece synchronously rotate, so that thinning stretching without sliding friction is realized until the stretching piece completely passes through the annular working belt. According to the scheme, an annular die is particularly adopted for metal thinning stretching, the structure is simple, flexibility is high, the mode is novel, sliding friction between the metal stretching piece and a die ring is weakened, and therefore the advantages that labor-saving thinning stretching is achieved, single-pass deformation is large, and the stretching piece is not prone to damage are achieved.

Description

technical field [0001] The invention belongs to metal plastic forming technology, in particular to a thinning stretching plastic processing method for common cylindrical parts or box-shaped parts. Background technique [0002] Cylindrical parts or box-shaped parts are common types of metal components. The traditional processing method is a forming technology or process method consisting of reverse extrusion combined with multi-pass thinning and stretching. Multi-pass thinning and stretching can greatly reduce the wall thickness and obtain a corresponding increase in the length of the stretched part. At the same time, it is beneficial to reduce the wall thickness difference caused by reverse extrusion blanking. It is currently widely used in the field of industrial manufacturing. . However, when the traditional thinning and stretching process is deformed, there is severe sliding friction between the working surface and the stretched part. On the one hand, the deformation for...

AI Technical Summary

Problems solved by technology

However, when the traditional thinning and stretching process is deformed, there is severe sliding friction between the working surface and the stretched part. On the one hand, the deformation force is increased, and the phenomenon of bottom cracking or tube wall tearing is prone to occur; on the other hand, On the one hand, it caused a series of problems such as low mold life and scratches on the surface of stretched parts.

Especially for some high-strength components that need to be stretched and deformed after heating, the traditional thinning and stretching process is even more difficult.

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