A flexible laser welding method and device for skin-stringer

Abstract

The invention provides a flexible laser welding method and device for skin-stringer, comprising: an off-line programming system obtains the seam track, the laser welding system obtains the gap data of the weld track, and the pre-weld scanning system establishes the gap width and welding seam The functional relationship of seam length; the central control system judges whether the assembly conditions meet the laser welding requirements; when the assembly conditions meet the laser welding requirements, the process planning system obtains relevant feature information, and obtains the spot welding process plan according to the relevant feature information and the model parameter database; According to the spot welding process plan, the laser welding system uses pulsed laser to perform spot welding in the welding area, and the molten pool monitoring system observes and records the whole spot welding process in real time. The present invention performs systematic and step-by-step welding on space-complex curve welds whose curvatures at different positions change from time to time, so as to reduce the sensitivity of process parameters, avoid defects such as incomplete penetration and weld leakage, improve the stability of the welding process, and improve the quality of welds the goal of.

Description

technical field [0001] The invention relates to laser welding technology, in particular to a flexible laser welding method and device for skin-stringer. Background technique [0002] TC4 titanium alloy has the characteristics of low density, high specific strength, and excellent corrosion resistance. After heat treatment, it has good plasticity, high strength, and good comprehensive mechanical properties. It is widely used in the aerospace field. my country's aviation industry takes large-scale, lightweight, and complex development as the main development policy, and is in an unprecedented stage of vigorous development. Based on this realistic demand, the application of titanium alloy skin-stringer structures as an important lightweight structure is becoming more and more widely. Dual laser beam bilateral simultaneous welding technology has the advantages of high welding speed, low heat input and high energy density, and its low heat input can minimize deformation and reduce...

AI Technical Summary

Problems solved by technology

In addition, titanium alloy skin-stringer structures often appear in large thin-walled complex welded structural parts in the actual application process of the aviation industry. The weld trajectory is usually a complex curve in space and the welding distance is long. This poses a more serious challenge to how to achieve continuous and stable welding of thin-walled titanium alloy skin-long stringer space complex curve welds

Images