Broach set structure for slotting mortise of wheel disc and slotting method

Abstract

The invention discloses a broach set structure for slotting a mortise of a wheel disc. The broach set structure comprises nth depth slotting broaches and the first width slotting broach, the tooth side width dimension b from the head tooth to the tail tooth of each depth slotting broach is designed with the back taper amount, and the tooth side width dimension b of the head tooth of the nth depthslotting broach is smaller than the tooth side width dimension b of the tail tooth of the (n-1) th depth slotting broach; the height dimension d of the width slotting broach is smaller than the heightdimension h of the tail tooth of the nth depth groove broach, the tooth side width dimension a of the head tooth of the width slotting broach is smaller than the tooth side width dimension b of the tail tooth of the nth depth groove broach, and the tooth side width dimension a of the tail tooth of the width slotting broach is larger than the tooth side width dimension b of the head tooth of the first depth slotting broach. The problem of friction between the tooth sides of the cutting teeth of the broach and the machined surface can be avoided, abnormal abrasion of the broach is effectively avoided, tooth breakage and damage of the broach are prevented, and the service life of the broach is prolonged.

Description

technical field [0001] The invention belongs to the technical field of design of a broach for broaching a tenon and groove of a disc ring, and in particular relates to a broach group structure and a slotting method for the tenon and groove of a wheel disc. Background technique [0002] At present, when the larger tenons and grooves on the wheel are broached by the broaching process, a group of broaches is used to adjust the relative position of the broach group and the wheel in the radial direction, that is, the radius value of the wheel, after multi-station broaching. , to complete the removal of the slotting allowance. However, the width of the cutting tooth part of each broach in the current broach group is the same, but the height direction is different with the increase of the tooth lift. The disadvantage of this design of the broach group is that it will lead to The friction between the side and the machined surface, specifically, includes the following situations: Fi...

AI Technical Summary

Problems solved by technology

However, the width of the cutting teeth of each broach in the current broach group is the same, but the height direction is different with the increase of the tooth lift. The disadvantage of this design of the broach group is that it will lead to The friction between the side and the machined surface, specifically, includes the following situations: First, because the width of the cutting teeth of each broach in the broach group is the same, the teeth of the cutting teeth of the last broach Friction between the side and the machined surface is easy to occur; second, when the broaching tool group broaches all the tongues and grooves on the entire wheel for the first time, adjust the radius value of the wheel, and when broaching again, due to the existence of indexing errors , resulting in friction between the sides of the broach cutting teeth and the machined surface

The friction in the above conditions intensifies the wear of the broach and shortens the service life of the broach. In severe cases, the broach may be damaged due to manufacturing errors and broaching indexing errors.

In addition, the existing technology requires that the tooth side dimensions of all broaches be the same, which inevitably leads to high design precision requirements and difficult manufacturing of the broaches

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