Five-coordinate plunge milling machining method of closed type bladed disc

Abstract

The invention discloses a five-coordinate plunge milling machining method of a closed type integral bladed disc, comprising the steps of: dividing machining areas of a passage of the machined closed type bladed disc; respectively generating passage offset surfaces in an air edge machining area and an air-exhaust edge machining area; solving a boundary line of the passage; generating straight-grain enveloping surfaces of the passage offset surfaces of the closed type integral bladed disc; respectively obtaining plunge milling cutter spacing orbits of the air edge machining area and the air-exhaust edge machining area so as to obtain the plunge milling cutter spacing orbits of the passage of the closed type integral bladed disc; and finally conducting plunge milling on the closed type integral bladed disc on a five-coordinate numerical control machine according to the obtained plunge milling cutter spacing orbits. The invention prevents the cutter interference when the closed type integral bladed disc is machined, solves the technical problems of great programming difficulty, multiple constraint conditions, the complex solving process of the cutter spacing orbits, and the like in the machining process and effectively realizes the five-coordinate plunge milling machining of the closed type integral bladed disc.

Description

technical field [0001] The invention belongs to the technical field of precision and ultra-precision cutting, and in particular relates to a plunge-milling method for an aero-engine closed integral blisk. Background technique [0002] The fans and compressors of aero-engines generally adopt the integral blisk structure. Compared with the traditional blade and disc assembly structure, the integral blisk saves the tenons, tenons and locking devices, avoiding the airflow loss of the tenons; at the same time, it greatly reduces the number of parts and reduces the weight of the structure. The development trend of blisk blades is that the shape is more and more complicated, and the wall thickness is getting thinner and thinner. The use of thin-walled and ultra-thin blade technology can solve the problems of blade leading edge shock wave and blade tip airflow separation caused by the increase of compressor airflow speed from subsonic speed to supersonic speed, thereby greatly impr...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the disadvantages of the closed blisk in the prior art, such as difficult programming, many constraints, and complicated tool path solution process, the present invention proposes a five-coordinate plunge-milling processing method for the closed blisk. The structural characteristics of the blisks adopt the five-axis plunge milling method, which effectively solves the cutting problem of the blisks

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