Method for lapping joint between laminate and metal plate

Abstract

The invention relates to a method for lapping a joint between a laminate and a metal plate. The method specifically comprises the following steps of (1), lapping the metal plate with the resin composite laminates and fixing with a fixture; (2), using a CMT welding machine to transport a welding wire to one side of the resin composite laminate, and carrying out local heating to a quasi-contact partbetween the resin composite laminate and the welding wire so that the local material temperature of the resin composite laminate can reach a melting state; (3), starting the CMT welding machine, inserting the welding wire into the partially melted resin composite laminate at a set wire feeding speed, and carrying out cold metal transition brazing welding when the welding wire contacts the metal plate; and (4), cutting off the welding wire on the resin composite laminate after welding, completing a welding nail, and continuing to carry out other welding nail operations. By means of the method,the resin composite laminate and the metal plate are easy to weld without destroying the joint structure and reducing the joint strength.

Description

technical field [0001] The invention belongs to the technical field of cold metal transition melting and brazing welding, and in particular relates to a method for overlapping joints of laminated plates and metal plates. Background technique [0002] Fiber-reinforced thermoplastic resin-based composite materials are distinguished from metal materials by virtue of their excellent characteristics, such as high specific strength and specific modulus, fatigue resistance, repeatable processing, and low molding processing costs. In order to meet the requirements of lightweight design, in Applications in engineering fields such as aerospace, high-speed rail, and wind power have developed rapidly. In the application process, the composite material cannot completely replace the metal material, and it needs to be connected with the metal material in some parts to give full play to the mechanical and physical properties of the two materials in the structure. [0003] At present, the t...

AI Technical Summary

Problems solved by technology

The mechanical connection improves the connection strength to a certain extent, but the fiber of the composite material needs to be cut off in the hole making project, resulting in stress concentration at the edge of the hole, which in turn increases the thickness of the connecting piece. In addition, a large number of fasteners are used, which increases the The weight of the joint is not conducive to the lightweight design of the structure

Compared with mechanical connections, glued connections are lighter in weight, but their load-bearing capacity and connection strength are lower

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