Fixtures for shot peening of ring parts of aviation products

Abstract

The invention discloses a tool fixture for performing shot blasting processing on ring-shaped parts of aviation products. The tool fixture has the structure that a tool fixture body is of a disc-shaped structure; a ring-shaped support surface for supporting end surfaces of the ring-shaped parts is designed on the fixture body of the disc-shaped structure; not less than three positioning pins which are distributed uniformly and are used for positioning the ring-shaped parts are designed on the respective same-diameter circumferences of two of the part on a ring-shaped support surface, the outer side of the ring-shaped support surface and the inner side of the ring-shaped support surface, and are matched with inner circles or excircles of large ends or small ends of the ring-shaped parts via pin cylinders, so that the ring-shaped parts are positioned on the ring-shaped support surface. Compared with the existing tool fixture, the tool fixture provided by the invention has the advantages that the quantity of tool fixtures is reduced, the processing cost is lowered, fixture replacement for shot blasting on reverse sides of parts can be prevented, the processing efficiency is improved, and the condition that shot particles enter the positioning surface to scratch the parts in the shot blasting process can be prevented.

Description

technical field [0001] The invention relates to a tooling fixture for shot peening processing of parts, especially a tooling fixture for shot peening processing of annular parts of aviation products whose two ends have different sizes and structures. Background technique [0002] For aviation parts subjected to alternating stress, such as important load-bearing parts on aircraft and engines, although there are many ways to damage them, the main and most of them are fatigue damage. One of the main ways to improve the fatigue strength of parts is to carry out shot peening treatment on parts. Many parts on aero-engines require shot peening. To carry out shot-peening strengthening treatment on both end faces and inner and outer surfaces of aviation product ring parts with different diameters or structures at both ends, it is necessary to fix the ring parts on the shot blasting equipment through fixtures. The tooling fixture used to fix the ring part, the design method known in...

AI Technical Summary

Problems solved by technology

The obvious disadvantages of the prior art fixture design method are that the number of fixtures to be used is large, the processing cost is high, and during the shot peening process, after one end face of the ring part is shot peened, the part needs to be removed And the current tooling and fixtures, the processing can only be continued after the tooling and fixtures are replaced, resulting in low processing efficiency and not conducive to mass production

In addition, due to the use of the entire inner or outer surface to position the part, the joint surface between the part and the fixture is relatively large, and there are dead angles that cannot be reached by shot peening. The shot air pressure is high and the shot flow speed is fast. Therefore, this clamping method will cause the shot to enter the joint surface of the part and the fixture during the shot peening process, resulting in scratches on the part.

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