A milling deformation control device and method for tapered thin-walled parts

Abstract

The invention relates to a milling deformation control device and method for conical thin-wall parts. The device is a fixed conical surface expansion mechanism consisting of a fixture body cooperatingconical surface, an upper gland and a bottom auxiliary support ring, wherein the fixture body cooperating conical surface is positioned on a base; the bottom auxiliary support ring is fixedly mountedat the outer periphery of the lower part of the fixture body cooperating conical surface; the upper gland is mounted on the upper end surface of the fixture body cooperating conical surface; and parts are limited among the fixture body cooperating conical surface, the upper gland and the bottom auxiliary support ring. Molding surface structures of the parts are fully analyzed to radically solve the problems of overproof roundness after clamping of the parts, nonuniform wall thicknesses of the parts after machining caused by cooperating gaps between fixtures and parts and overproof wall thicknesses, so that theoretical basis is laid for future machining of products with the same type, and meanwhile, new thoughts are developed for clamping schemes of parts with other types.

Description

technical field [0001] The invention relates to a processing technology of thin-walled parts, in particular to a deformation control device and method for milling of tapered thin-walled parts. Background technique [0002] There are many kinds of materials for casing parts in aero-engines, among which thin-walled parts with tapered inner surfaces occupy a certain proportion. The wall thickness of such parts is generally between 0.8-2.5mm, and the outer surface is designed with reinforcing ribs and various This kind of installation island, usually the processing scheme of this kind of parts is that the forging blank is formed by turning and milling the inner and outer profiles. [0003] Since the material removal rate of this type of thin-walled parts reaches about 90%, whether the part process is turning first and then milling or first milling and then turning, there is a certain influence of the post-processing of the part on the first-formed size. After the part is process...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, such as large deformation, uneven wall thickness or out-of-tolerance wall thickness in the milling process of conical thin-walled parts, the present invention provides a fundamental solution to the out-of-tolerance roundness after the parts are clamped and the cooperation between the fixture and the parts. Device and method for controlling deformation of tapered thin-walled parts in milling due to uneven wall thickness and wall thickness out-of-tolerance problems caused by gaps

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