Method for processing thin wall welder cases of revolving body structures

Abstract

The invention discloses a method for processing thin wall welder cases of revolving body structures, belonging to the technical field of aero-engine metal plate forming and welding. According to the invention, a whole pre-deformation welding/forming method is used for solving the problems that sizes of mounting edges are out of tolerance, coaxiality of front and rear mounting edges with main bodies after welding is out of tolerance and residual stress distribution of welding components is unbalanced. The method provided by the invention comprises the following steps of: carrying out technological structure welding deformation allowance compensation design on a mounting edge and a main body of a thin wall welder case before the welding according to the plastic deformation characteristics of materials; plastically forming an expansion block according to an expander work part, size and final structural size requirement of parts; carrying out automatic argon arc welding on the mounting edge and the main body; assembling the welded welder case and expansion block on the expander work part to carry out expansion plastic forming and controlling the expansion forming size through adjusting pressure of the expander; and unloading the pressure of the expander, recovering the expander work part and unloading the parts to complete the welding/forming process.

Description

technical field [0001] The invention belongs to the technical field of sheet metal forming and welding manufacturing of aero-engines, and in particular relates to a processing method for a thin-walled welded casing of a rotary structure, which is applied to the manufacture of thin-walled welded casings with front and rear mounting edges. . Background technique [0002] Welded casing with rotary structure (such as figure 1 (shown) The most prominent technical problem in manufacturing is the coaxiality of the front and rear mounting edges and the main body. This quality problem will cause a series of problems that affect engine performance, such as changes in the section of the engine’s working flow channel and deformation caused by assembly stress. . The reason for analyzing the misalignment is mainly from the welding deformation and the additional stress deformation during the heat treatment process. Since the welding and heat treatment process is a material thermal proces...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that the size of the welding receiver mounting edge of the existing rotary structure is out of tolerance, the coaxiality of the front and rear mounting edges with the main body is out of tolerance after welding, and the residual stress distribution of the welded components is unbalanced, the present invention provides a rotary body The processing method of structural thin-wall welded casing

This method adopts the integral pre-deformation welding / forming method, which solves the deformation problem that may be caused by the engine assembly stress

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