Slender part welding deformation control method

Abstract

The invention discloses a slender part welding deformation control method. Deformation pre-judgment is carried out through finite element analysis before welding, reverse deformation control is adopted, welding reverse deformation control is carried out through a flexible welding device during welding, and welding deformation is reduced through a method that flexible shape preserving devices control deformation after welding. The flexible welding device comprises a base, a fixed baffle, a movable baffle, a screw, a nut and a sliding guide rail. Each flexible shape preserving device comprises an L-shaped clamping plate, a supporting plate, a shape preserving ejector rod, and a shape preserving nut. According to the slender part welding deformation control method, by means of the flexible welding device, the welding of slender parts is achieved easily and effectively, the production key point is broken through, welding and welding shape preserving processing are achieved through the flexible welding device and the multiple flexible shape preserving devices, the working efficiency is improved, the cost is saved, and the quality is guaranteed.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a method for controlling welding deformation of slender parts. Background technique [0002] The welding of slender parts is deformed due to various factors such as insufficient structural rigidity, thermal deformation during welding, and stress release deformation after welding, resulting in uncontrollable final deformation trend and large deformation. The existing commonly used welding process scheme is to design a special fixture according to its shape, and fix it on the fixture for welding. [0003] The realization of the welding deformation control technology of slender parts needs to overcome the deformation generated during the welding process and the deformation generated after welding. Due to the long and thin workpiece to be welded, the heating is uneven during welding, local stress is easy to occur, distortion and deformation are easy to occur, and the dimensional ac...

AI Technical Summary

Problems solved by technology

Due to the long and thin workpiece to be welded, the heating is uneven during welding, local stress is easy to occur, distortion and deformation are easy to occur, and the dimensional accuracy is not easy to control. According to the existing process plan, the anti-deformation angle is calculated before welding, and the deformation during the welding process cannot be achieved. Control, easy to cause distortion after welding, large amount of deformation, difficult or impossible to correct, easy to produce substandard products, resulting in long manufacturing cycle, high cost and low efficiency

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