A jig for precision forging blade mortise processing

Abstract

The invention discloses a fixture for processing of a precisely-forged blade tenon root. The fixture comprises a base plate, a fixture body and a base. The fixture tightly clamps a non-processing portion of the tenon root by means of joint positioning of the base plate and a precisely-forged blade body, and irregular curved surface positioning is converted into regular planar positioning. The fixture body and the base are in detachable positioning connection, and after one side of the blade tenon root is milled, the blade tenon blade and the fixture body are directly turned over to be fixed onto the base, so that datum uniformity in positioning and processing of the blade tenon root can be well guaranteed, and two-sided processing of the tenon root can be completed by one-time numerical control programming; processing precision is improved, errors caused by datum noncoincidence can be reduced, and manpower consumed by demounting and clamping is reduced while time cost on demounting and clamping is shortened. Moreover, the fixture is simple in structure, convenient for blade clamping and positioning operations and capable of protecting the surface of the blade body from damage and deformation during positioning. Additionally, the fixture can be further applied to tenon root processing of other types of precisely-forged blades such as precisely-forged blades of steam turbines.

Description

technical field [0001] The invention belongs to the technical field of aero-engine blade processing, and in particular relates to a fixture for precision forging blade tenon root processing. Background technique [0002] As one of the key parts of the aero-engine, the blade occupies an important position in the engine and has a vital impact on the performance of the aero-engine, and is the "heart" of the aero-engine. Blades are the most used parts in aero-engines. An aero-engine has thousands of blades, of which forged blades account for more than 80%; the production volume of blade forgings is very impressive in the forging industry. [0003] The blades of the new generation of aero-engines mostly adopt the method of precision forging, in which the profile of the blades is guaranteed by die forging, the forming precision is high, and machining is no longer required. The mortise root and intake and exhaust edges of precision forged blades are limited to forging technical pr...

AI Technical Summary

Problems solved by technology

[0005] In order to avoid the deficiencies of the existing technology and overcome the problems of over-positioning and the need for two times of clamping on the processing surface during blade tenon root processing, and poor repeat positioning consistency; the invention proposes a method for precision forging blade tenon root processing Fixture, the fixture is jointly positioned by the upper surface of the base plate and the precision forged blade body, clamped at the non-processed part of the mortise root, and converts the irregular curved surface positioning into a regular plane positioning, so that the double-sided mortise root can be completed in one NC programming processing

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