Method for broaching deformation and eliminating cutter receiving edges of large axial mortise notch

Abstract

The invention discloses a method for broaching deformation and eliminating cutter receiving edges of a large axial mortise notch. The method comprises the steps that a broaching tool is used for roughly broaching a square groove, expanding the groove, forming and finely broaching the mortise groove to the final size required by the design layer by layer on a numerical control broaching machine ina gradual cutting type broaching mode, and final broaching machining is completed; and a mortise flash structure is roughly broached, the machining allowance of 0.2mm-0.3mm is reserved, after fine broaching machining of a mortise and rough broaching machining of a flash are completed, fine milling machining is carried out on the axial cutter receiving edges, caused by cutter relieving of the broaching tool, of the flash allowance part, an end milling cutter is adopted for fine milling, and fine milling machining of the flash allowance of the single mortise is completed. According to the technical scheme, the good mortise machining quality and the relatively stable and controllable machining period are obtained, so that the requirements of most production units in large axial mortise machining are met.

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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