A method for processing thin-walled parts

Abstract

The invention provides a thin-wall part machining method. The thin-wall part machining method comprises the following steps: (A) machining a first supporting surface on a blank part; (B) providing a first supporting clamp for supporting the first supporting surface machined in the step (A), machining a horizontal mounting edge and a first supporting edge profile of a supporting edge and then machining three uniformly-distributed mounting holes at the horizontal mounting edge; (C) providing two restraining rings for clamping the horizontal mounting edge machined in the step (B), fixing by usinga bolt, and providing a second supporting clamp for machining the mounting holes via a through hole; (D) providing a third supporting clamp, directly machining to obtain a final dimension of an outerprofile; and (E) providing a fourth supporting clamp, and directly machining to obtain the final dimension of an inner profile so as to complete the machining of a thin-wall part. The thin-wall partmachining method provided by the invention can greatly reduce the dependence on operation level of a technician.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a method for processing thin-walled parts of an aero-engine. Background technique [0002] Thin-walled parts have been widely used in the aerospace field due to their structural characteristics such as light weight and high strength. Thin-walled parts have poor rigidity and weak strength, and are easily deformed during processing, which increases the shape and position error of the part, makes it difficult to guarantee the processing quality of the part, and increases the difficulty of processing the part. The processing of thin-walled parts is relatively difficult in traditional mechanical processing. tough question. [0003] figure 1 It is a schematic cross-sectional structure diagram of a thin-walled part used in an aero-engine, see figure 1 As shown, the thin-walled part 100 is an annular part with a wall thickness within 2 mm, and its cross-sectional structure include...

AI Technical Summary

Problems solved by technology

Thin-walled parts have poor rigidity and weak strength, and are easily deformed during processing, which increases the shape and position error of the part, makes it difficult to guarantee the processing quality of the part, and increases the difficulty of processing the part. The processing of thin-walled parts is relatively difficult in traditional mechanical processing. tricky question

[0003] figure 1 It is a schematic cross-sectional structure diagram of a thin-walled part used in an aero-engine, see figure 1 As shown, the thin-walled part 100 is an annular part with a wall thickness within 2 mm, and its cross-sectional structure includes a horizontal mounting edge 1, a supporting edge 2 and an arc portion 3, and a plurality of mounting holes are evenly distributed on the horizontal mounting edge 1. (not shown in the figure), the dimensional requirements of the thin-walled part 100 include flatness of 0.02, parallelism of 0.02, and surface profile of 0.05, that is to say, the dimensional precision of the thin-walled part 100 requires high, Due to the thin wall of the part, and the machining process requires multiple finishing and clamping, the cumulative error increases, and the datum plane is easily deformed after finishing, resulting in a series of precision dimensions related to the datum plane often being out of tolerance or even scrapped

The existing finishing process relies too much on the operation level of skilled personnel, has great limitations, and it is difficult to control the deformation of parts in essence

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