Staggered-tooth three-edge broach

Abstract

The invention discloses a staggered-tooth three-edge broach. The broach comprises a broach body, a plurality of side broach teeth are arranged on the two axial sides of the broach body respectively, chip containing grooves are formed between every two adjacent side broach teeth on the same side, the chip containing grooves in the two sides of the broach body are alternately formed in the axial direction of the broach body, and the problem that the broach body at the chip containing grooves is weak in that chip containing grooves in the two sides of the broach body are located in the same axial position of the broach body is avoided, so that the strength of the broach body can be improved by arranging the chip containing grooves in the two sides of the broach body in a staggered mode. The molded surface of a mortise broached by the three-edge broach is free of tool marks, and the surface quality of the mortise is good; and the cutter teeth on the two sides are of a staggered tooth structure, and it is guaranteed that each cutter tooth has enough chip containing space and enough strength and rigidity. The design structure solves the problem of poor strength of the small-surface mortise broach, and has extremely high popularization value in design and manufacturing of the small-surface mortise broach.

Description

technical field [0001] The invention belongs to the design and manufacture technology of aero-engine cutters, and in particular relates to a small tongue-and-groove broach for an aero-engine wheel. Background technique [0002] The tenon and groove of the aero-engine wheel are usually broached by broaching. Generally, the high-precision tenon and groove profile is not allowed to be connected, and it is broached by a single surface finishing broach. The existing three-sided edge broaching knife is composed of two side profile teeth and a top profile tooth. Cut a larger tongue and groove. When broaching a small tenon and groove, the three-edge coplanar three-sided broach has the following problems: the depth of the chip pockets on both sides is not enough, and the thickness of the ribs at the bottom of the chip pockets is extremely thin, and may even penetrate, resulting in The strength of the broach is extremely poor, so it cannot broach small tenons and grooves. Contents...

AI Technical Summary

Problems solved by technology

When broaching a small tenon and groove, the three-edge coplanar three-sided broach has the following problems: the depth of the chip pockets on both sides is not enough, and the thickness of the ribs at the bottom of the chip pockets is extremely thin, and may even penetrate, resulting in The broach strength is extremely poor, so it is impossible to broach small tenons and grooves

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