Underwater welding device and method for resistance welding

Abstract

The invention relates to the field of resistance welding and provides underwater welding for resistance welding. Underwater welding for resistance welding refers to welding of a welded workpiece immersed in water in a workpiece water tank by the aid of resistance welding equipment. An underwater welding device for resistance welding comprises the resistance welding equipment, the workpiece water tank, welding electrodes and water; the resistance welding equipment comprises a welding power supply and a spot welding machine head provided with electrode chucks; the welding power supply is electrically connected with the electrode chucks of the spot welding machine head through output cables; welding electrodes are mounted on the electrode chucks; the workpiece water tank is mounted on a working table below the spot welding machine head; and the water is added to the workpiece water tank. Besides, the invention discloses an underwater welding method for resistance welding. Compared with the prior art, the method have the advantages that the underwater welding method for resistance welding is put forward to solve the technical problem of difficulty in heat dissipation of resistance welding in the air environment, resistance welding in the air environment is extended to be underwater welding, and the technical problem about heat dissipation of resistance welding is effectively solved.

Description

technical field [0001] The invention belongs to the field of resistance welding, and more specifically, the invention relates to a resistance welding underwater welding device and a resistance welding underwater welding method. Background technique [0002] At present, resistance welding includes double-side spot welding of upper and lower welding electrodes and single-side spot welding of parallel electrodes or parallel electrode welding heads. The resistance welding of the prior art is performed in an air environment or an inert gas environment. Due to the large welding current of resistance welding, the resistance heat generated is very high. When the upper and lower electrodes are used for double-sided spot welding of the workpiece to be welded, it will inevitably cause deformation of the workpiece near the welding point. Continuous rapid welding will also cause overheating of the upper and lower electrodes. The solder joints stick and damage the end face of the welding ...

AI Technical Summary

Problems solved by technology

Due to the large welding current of resistance welding, the resistance heat generated is very high. When the upper and lower electrodes are used for double-sided spot welding of the workpiece to be welded, it will inevitably cause deformation of the workpiece near the welding point. Continuous rapid welding will also cause overheating of the upper and lower electrodes. The solder joints stick and damage the end face of the welding electrode; when single-sided spot welding is performed with parallel electrodes or parallel electrode welding heads, the base pads of the workpiece to be welded (such as the base pads on the printed circuit) are often fixed with the insulating liner. Connected or inlaid, the resistance heat generated by the parallel electrode welding head and the workpiece to be welded is too high, often causing the substrate pad to peel off

In addition, in the air environment, the tip of the high-temperature parallel electrode welding head is easily oxidized and damaged

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