A Method for Broaching Deformation of Large Axial Tenon and Groove Notch and Eliminating the Edge

Abstract

The invention discloses a method for broaching deformation of large axial tenon and groove grooves and eliminating the edge of the knife. On a numerically controlled broaching machine, a gradual-cut broaching method is adopted to use a broach for the tenon and groove groove shape through rough drawing layer by layer. Groove, groove expansion, forming and finish broaching to the final size required by the design, and complete the final broaching process; carry out rough drawing on the tongue and groove flash structure, keep a machining allowance of 0.2mm‑0.3mm, and finish the finishing of the tenon and groove After broaching and rough drawing of flash, fine milling is performed on the axial edge of the flash margin due to the broach, and the end mill is used for fine milling to complete the flash of a single tongue and groove Finish milling of allowance. The technical solution of the present invention obtains better tenon and groove processing quality and a relatively stable and controllable processing cycle, so as to meet the needs of most production units in large axial tenon and groove processing.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a method for broaching deformation of large axial mortise grooves and eliminating cutting edges. Background technique [0002] An aero-engine fan disk part has an axial tenon and groove with a large flash structure. According to the structural characteristics, the tenon and groove can be divided into a tenon and groove area and a flash area. The tenon and groove area carries the key role of connecting with the blade. It is very strict, and the broaching method is generally used. Although the flash area does not need to be connected and matched, due to its large radial dimension changes, broaching cannot guarantee the relative relationship between the two planes, the amount of dimensional change, and the surface roughness requirements. [0003] The large axial tenon and groove is a typical structure of disk parts in the fan rotor unit of contemporary aero-engines. Due to the s...

AI Technical Summary

Problems solved by technology

The broaching method is gradual cutting. The broaching of the notch flash part often requires a combination of multiple sets of broaches. Due to the release of processing stress, multiple joints will appear on the inner surface of the tenon and groove flash. The edge of the knife, and the size of the same surface varies greatly, and the size cannot be guaranteed. It often needs to be manually trimmed to meet the design requirements in the later stage, and the quality of the parts and the processing cycle cannot be guaranteed.

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