Aluminum alloy fusion welding device

Abstract

The invention discloses an aluminum alloy fusion welding device. The aluminum alloy fusion welding device comprises welding equipment, a fixing device and cooling equipment, wherein the welding equipment comprises a welding gun; the upper end of the fixing device is fixedly connected with the welding equipment; the cooling equipment is connected with the lower end of the fixing device; and the included angle between the cooling equipment and the welding gun is 45 + / -5 degrees. A nozzle of the welding gun is 20 + / -5 mm away from a welding seam; and the distance between a cold source and a molten pool is 45 + / -10 mm. According to the aluminum alloy fusion welding device, the fixing device is adopted to accurately control the angle between the cooling equipment and the welding equipment, thetemperature peak value of materials behind a heat source can be effectively reduced, deformation of the welding seam and the materials in the surrounding area of the welding seam is more coordinated,and the longitudinal residual tensile stress peak value of a welding seam area is obviously reduced; a heat affected zone can be reduced, and grains are refined; the tensile strength and the fatigue strength of a welding joint are obviously improved; the area of a fatigue fracture crack propagation area is large, and the area of an instantaneous fracture area and the distance between fatigue striations are reduced; and the mechanical property of the aluminum alloy fusion welding joint can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy welding, in particular to an aluminum alloy fusion welding device. Background technique [0002] As a traditional welding method, fusion welding has the advantages of stable welding process, excellent weld shape, high quality welded joints, and easy automation. However, due to the concentration of heat sources in fusion welding, the high-temperature heating of metal materials results in a heat-affected zone of the metal material, and the thermal deformation of the material results in residual stress in the weld, which greatly reduces the mechanical strength of the metal material. [0003] The cooling with welding method can reduce the high-temperature residence time of the material after welding, reduce the residual stress of the weld after welding, and at the same time refine the grains of each part of the welded joint, and improve the strength of the welded joint to a certain extent. [...

AI Technical Summary

Problems solved by technology

However, the pure water cooling device is easy to form many pores on the welding interface, which affects the welding quality

[0005] In summary, there is an urgent need for an aluminum alloy fusion welding device to solve the problems of low strength of welded joints and many bubbles in the weld seam in the prior art

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