A systematic control method for suppressing welding defects

Abstract

The invention relates to a systematic control method for suppressing welding defects, which is used for controlling the double-side synchronous welding defects of titanium alloy skin-stringer wall plates with double laser beams. By carrying out double laser beam bilateral simultaneous welding experiments on titanium alloy skin-stringer wall plate specimens, collecting joint information, and using RSM response surface analysis to establish statistics between process parameters, weld information, and joint defect information Model. During the simultaneous welding process of dual laser beams on both sides of the titanium alloy skin-stringer wall plate structure, the laser process control system monitors the weld area in real time, and the captured weld information is processed and fed back to the information judgment center. If the quality of the weld is unqualified, according to the judgment result of the feedback, the adjustment center further proposes a parameter optimization plan, and the welding process continues. The formulation of the optimization plan is guided by the statistical model of the process parameters, weld information, and joint defect information established by the test piece experiment, and finally realized the control of double-sided simultaneous welding defects of the titanium alloy skin purlin wall plate with double laser beams. Purpose.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a systematic control method for suppressing welding defects, and in particular to a systematic control technology for double-laser beam bilateral synchronous welding process. Background technique [0002] Titanium alloy has unique advantages such as good specific strength and specific modulus. Compared with aluminum alloy skin-stringer panel structure, titanium alloy skin-stringer panel structure has higher reliability, and also meets the requirements of aircraft With the demand for lightweight, under the background of the rapid development of the aviation industry, the application of titanium alloy skin-stringer panel structure is more extensive. Dual laser beam bilateral simultaneous welding technology is a brand-new laser welding process, which can effectively alleviate the deformation problem of skin-wall panels, and also successfully avoid the damage caused by the trad...

AI Technical Summary

Problems solved by technology

The existence of welding defects will seriously affect the mechanical properties of weldments, so the control of welding defects has always been an urgent problem to be solved

Titanium alloys are very easy to absorb hydrogen and oxygen during the welding process. If the protection is not proper, there will be a large number of pores in the weld area after welding.

And because the current double-laser beam double-sided synchronous welding process of titanium alloy is not perfect, when the process parameters are not selected properly, welding defects such as incomplete fusion, incomplete penetration and cracks after welding will greatly weaken the fatigue limit of the weldment and reduce the welding quality. However, there are still some difficulties in suppressing the defects of titanium alloy skin-stringer wall plate double-laser simultaneous welding on both sides

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