Fixture for abrasive flow polishing of blisk

Abstract

The invention provides a fixture for abrasive flow polishing of a blisk. The fixture consists of an upper disc tray, a lower disk tray, an outer wheel hub sealing ring, an inner wheel hub sealing ring, front blade edge sealing gaskets and rear blade edge sealing gaskets, wherein the upper disc tray and the lower disk tray consist of inner and outer concentric rotating bodies, sealing gasket bases are fixed in the disc trays and are in one-to-one correspondence with blades, and the front blade edge sealing gaskets and the rear blade edge sealing gaskets are fixed in the sealing gasket bases; and the outer wheel hub sealing ring and the inner wheel hub sealing ring fill gaps between the upper and lower disk trays and inner and outer wheel hubs of the blisk to be polished. According to the invention, the flow of abrasive materials is correctly guided, the abrasive materials are prevented from damaging the front and rear edge profiles of the blades during an abrasive polishing process, the blisk is prevented from deforming due to excessive stress caused by the factor that upper and lower cylinders pushes a piston at high pressure to extrude the abrasive materials during a blisk polishing process, the air impermeability of the fixture is improved, and work environment pollution caused by abrasive material leakage and possible physical injury accidents are prevented.

Description

technical field [0001] The invention relates to the technical field of polishing key parts of aero-engines, in particular to a jig for abrasive flow polishing of an integral blisk. Background technique [0002] In an aero-engine, the blisk as a key part is composed of inner and outer hubs and several blades. Most of the blade profiles are complex free-form surfaces, and the blade body has the characteristics of bending, wide, sweeping, twisting, and thin. With the development of the aviation industry, the number of blades in the blisks installed in aero-engines is increasing, and the working conditions are getting worse and worse. With the improvement of aerodynamic performance requirements, the blade space surface is becoming more and more complex. After milling, the surface of the blade must be polished to meet the increasing requirements for blade surface processing. [0003] At present, the traditional mechanical special processing equipment mainly used in domestic blad...

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is to design a special abrasive flow fixture for the integral blisk of the aero-engine, through which the abrasive flow can be correctly guided; the abrasive can be prevented from damaging the front and rear edge profiles of the blade during the polishing process; the integral blisk can be prevented from being polished. During the process, due to the high pressure of the upper and lower cylinders pushing the piston to squeeze the abrasive, the blisk is deformed due to excessive force; the air tightness of the fixture is improved to prevent the pollution of the working environment and possible personal injury accidents caused by the leakage of the abrasive

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