Centering non-deformation hole grinding pitch circle clamp

Abstract

The invention belongs to the technical field of machining, and relates to a centering non-deformation hole grinding pitch circle clamp. The clamp comprises a clamp body, an inner cam is assembled on the clamp body in a centering mode, a plurality of centering spigots and positioning curved surfaces are arranged on the inner wall of the inner cam at intervals, the positioning curved surfaces are distributed in an Archimedes spiral mode, a centering assembly is rotationally arranged in the inner cam and comprises an annular tooth-shaped retainer and a plurality of positioning rods loosely connected to the tooth-shaped retainer, and the positioning rods are in contact connection with the positioning curved surfaces to position a workpiece. The centering non-deformation hole grinding pitch circle clamp has the advantages of being simple in structure, low in price, accurate in centering and free of deformation in workpiece machining.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and relates to a centering and non-deformable hole grinding pitch circle jig. Background technique [0002] In the planetary transmission mechanism, some planetary gear structures are very thin between the tooth root of the gear and the hole wall due to space constraints, but the high-precision planetary transmission requires very high installation accuracy for the gear, including installation The roundness requirement of the middle hole is very high. Therefore, the processing of this type of gear has brought great difficulties, because the hole wall is thin and it is easy to cause clamping deformation when processing the hole. [0003] SMW, Germany, has developed a film chuck for the processing of such parts. However, its price is very expensive, and ordinary companies cannot afford it, so that it cannot be promoted on a large scale. Moreover, in addition to being expensive, it ...

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Problems solved by technology

However, its price is very expensive, and ordinary companies cannot afford it, so that it cannot be promoted on a large scale

Moreover, in addition to being expensive, it has some other disadvantages:

But its disadvantage is that when the frequency of use is too high, the centering accuracy will also decrease after the elastic body is fatigued.

[0005] 2. The elastic body of the SMW fixture drives the positioning spherical surface to contact the gear to achieve the purpose of centering. Its centering accuracy is micron level, but it is difficult to replace the positioning spherical surface by itself after it is worn out, resulting in dependence on subsequent maintenance, not only economically. Large, and the time limit is also subject to others

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