Method for improving broaching precision of mortises in excircle of wheel disc part

Abstract

The invention discloses a method for improving the broaching precision of mortises in the excircle of a wheel disc part and belongs to the technical field of aero-engine part manufacturing. The adopted technical scheme is that the method comprises the following steps: installing an excircle process platform with a plurality of angular locating slots on the excircle of the to-be-processed wheel disc part; installing two angular locating slots in the excircle process platform if the number of the mortises in the excircle of the to-be-processed wheel disc part is an even number, and broaching the mortises of the wheel disc part in twice; installing three angular locating slots in the excircle process platform if the number of the mortises in the excircle of the to-be-processed wheel disc part is an add number, and broaching the mortises of the wheel disc part in three times. According to the method disclosed by the invention, the contact area between locating surfaces of the mortises of the part and an included angle is effectively increased, so that the stability of fixture positioning is enhanced. Meanwhile, the part angular displacement caused by an angular component generated by broaching is decomposed. The method is simple in operation and skillful in design. Through the method, the fixture rigidity can be greatly enhanced, the deformation of the broached part is reduced, and the dimensional precision of the part is improved.

Description

technical field [0001] The invention belongs to the technical field of manufacturing aero-engine parts, and in particular relates to a method for improving the broaching precision of the outer circle tenon and groove of a wheel disc part. Background technique [0002] In the process of broaching the outer circular tenon and groove of the traditional roulette parts, the positioning is carried out through the only axial datum, radial datum and angular datum, and the outer round tenon and groove are broached sequentially. This kind of processing technology has a simple structure of the part, and can ensure the broaching accuracy of the roulette part without affecting the rigid design of the positioning fixture. For parts with more complex structures, the roulette parts that limit the rigid design of the positioning fixture, after broaching the tenon and groove according to the conventional method, the area between the tenon and groove on the part is very small, and only a small...

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Problems solved by technology

[0003] In order to overcome the above-mentioned defects in the prior art, the purpose of the present invention is to provide a method for improving the broaching accuracy of the outer circle tenon and groove of the roulette parts, which can effectively solve the problem of broaching tenons caused by the poor rigidity of the positioning fixture of the roulette parts. The problem that it is difficult to guarantee the precision of the tenon and groove after the deformation of the part after the groove

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