Design method for tooth profile contour line of spinning wheel during spinning forming of internal and external tooth part

Abstract

The invention discloses a method for designing a tooth profile contour line of a spinning roller during spinning forming of an internal and external tooth part, which comprises the following steps of: firstly, determining a tooth number ratio between a core mold and the spinning roller and the tooth number of the spinning roller, and then obtaining a primary shape of the tooth profile contour line of the spinning roller by adopting a generation method according to an external contour shape of the internal and external tooth part; and according to the contact and friction conditions between each deformed part of the blank and the core mold or the spinning roller in the spinning forming process and the generated non-uniform deformation, the initial shape of the tooth profile of the spinning roller is adjusted by combining the wall thickness requirement of the internal and external tooth part, so that the tooth profile line of the spinning roller is obtained. The defects in the prior art are overcome.

Description

technical field [0001] The invention relates to the plastic forming technology of metal materials, more specifically, relates to a design method of the profile line of the tooth profile of the rotary wheel during the spinning forming of the internal and external tooth parts. Background technique [0002] Several plastic processing methods are commonly used for internal and external gear parts, including rolling extrusion, rolling, radial forging, etc., because these plastic forming methods are all formed for tooth profiles one by one, and the tools are often accompanied by axial and radial reciprocating movement , not only the production efficiency is low, but also the teeth formed in the back will have an impact on the teeth formed in the front, making it difficult to obtain a high-precision tooth profile. In the existing spinning forming process of internal and external gear parts, the blank is deformed by rolling between the rotary wheel and the mandrel, thereby obtaining...

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Problems solved by technology

But this method has two disadvantages: on the one hand, some cases cannot be repaired, similar to making the hole bigger and cannot be repaired smaller; on the other hand, it is often impossible to repair it in one step, and it needs repeated trial and error and repeated repairs , resulting in too long trial production cycle, resulting in waste of manpower and material resources

[0004] For the spinning forming of internal and external gear parts, its deformation characteristics will have a new impact on the tooth profile shape design of the rotary wheel. If it is not fully considered, the shape modification of the toothed rotary wheel will be more difficult

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