Broaching turbine disc tongue-and-groove full-profile tooth type finishing broach and grinding method thereof

Abstract

The invention discloses a broaching turbine disc tongue-and-groove full-profile tooth type finishing broach. The broaching turbine disc tongue-and-groove full-profile tooth type finishing broach comprises a broach body and cutting teeth; one lateral side of the broach body is a lateral base side and the other lateral side is provided with a V-shaped groove which is used for compressing the broach; a center bisecting surface of the V-shaped groove is parallel to the broach body bottom side; the broach body bottom side is a bottom base side; the cutting teeth comprise top surface cutter teeth which are arranged on the top surface of the broach body and lateral side cutter teeth which are symmetrically arranged on bilateral sides of the broach body; the top surface cutter teeth and a rake face of the lateral side cutter teeth on the bilateral sides are in the same plane; a cutting tooth profile shape which is formed by the top surface cutter teeth and the lateral side cutter teeth on the bilateral sides is matched with a tongue-and-groove of a to-be-machined part to be used for broaching an engine turbine disc to be not allowed connecting a tongue-and-groove of the broach. The broaching turbine disc tongue-and-groove full-profile tooth type finishing broach achieves manufacturing and machining of the engine turbine disc and guarantees smooth product deliver.

Description

technical field [0001] The invention belongs to the field of machining the tenon and groove of turbine discs of aviation and aerospace engines, and in particular relates to a full-profile tooth-shaped finishing broach for broaching the tenon and groove of turbine discs and a grinding method thereof, which are used to ensure the size of the final profile of the tenon and groove, precision and surface quality. Background technique [0002] The design of the tenon and groove of the traditional engine turbine disc provides the tool receiving area and the tool receiving method, and the final profile of the tenon and groove is usually formed by broaching by tooth type finishing broach, groove bottom finishing broach and open chamfering knife. Among them, the tooth-type broach has double-sided teeth, and is usually a straight tooth. There is no strict requirement for the teeth on both sides to be staggered in the length direction, that is, the rake faces on both sides may not be in...

AI Technical Summary

Problems solved by technology

According to the existing technical method, the teeth on both sides will form staggered teeth in the length direction, and the grinding marks on the rake face of the teeth on both sides will be left on the top teeth, resulting in the formation of gaps on the edge of the top teeth , cannot guarantee the smooth transfer and correctness of the profile of the three-sided edge broach of the full profile, and cannot meet the design requirements of the tooth type broach and the tenon and groove broaching requirements

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