Device for eliminating welding cracks and pores of aluminum-steel dissimilar metal

Abstract

The invention discloses a device for eliminating welding cracks and pores of aluminum-steel dissimilar metal. The device comprises a casing, a welding chamber, a far-infrared heater, a water storage chamber and a protective seat, wherein the water storage chamber is arranged at the inner bottom end of the casing; the casing above the water storage chamber is internally provided with the welding chamber. According to the device disclosed by the invention, a copper sheet is arranged between a steel plate and an aluminum alloy plate; the aluminum alloy plate and the steel plate are respectively contacted with a material guiding pipe by using the copper sheet; on the one hand, the condition that the steel plate and the aluminum alloy plate are contacted and react to generate a brittle compound in the heating process is avoided by use of the limiting action of the copper sheet; on the other hand, the copper sheet realizes a heat conduction effect, and conducts the heat produced by a heating barrel to welding ends of the aluminum alloy plate and the steel plate separately for preheating the steel plate and the aluminum alloy plate, so that the phenomenon that the welding quality is affected as bubbles are produced because of nonuniform heating in the welding process is reduced; a weld seam is integrally welded after the copper sheet is heated and melted so as to improve the welding effect.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a device for eliminating welding cracks and pores of dissimilar metals of aluminum and steel. Background technique [0002] Due to the great difference in the metal properties of steel and aluminum in the existing welding of steel and aluminum joints, the welding performance of steel and aluminum is poor. The main problems are: it is difficult to directly weld aluminum and steel because of their melting points and The density is different. The melting point of steel is higher than that of aluminum. When aluminum is melted into liquid, the steel is still in solid state. Secondly, the problem of density is that when the steel is melted, the liquid aluminum will float on the molten steel. When the liquid cools down, the components welded by them are uneven. , leading to a decrease in the performance of the welded joint, and the thermal conductivity of steel and aluminum is very dif...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a device for eliminating cracks and pores in the welding of dissimilar metals in aluminum and steel, so as to solve the problem that cracks and air bubbles are easily produced in the existing steel and aluminum laser welding proposed in the above background technology

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