Welding device for U-shaped or V-shaped workpiece

Abstract

The invention aims to provide a welding device for a U-shaped or V-shaped workpiece, so that the welding operation is facilitated, and the welding quality is improved. The welding device for the U-shaped or V-shaped workpiece comprises a pressing arm mechanism and a supporting piece, wherein the pressing arm mechanism comprises a pressing arm, a connecting block at the end of the pressing arm and a driving part for driving the pressing arm to move, the connecting block, the supporting pieces are respectively provided with a welding connecting piece used for being connected with a welding gun, the welding connecting piece, the connecting block and the supporting piece form a welding loop, the driving part is connected with or disconnected from the supporting part by controlling the connecting block so as to realize the closing or disconnection of the welding loop, the two pressing arms are driven by the driving piece, and the movement directions of the two pressing arms are opposite. By means of the welding device, the U-shaped or V-shaped workpiece can be subjected to resistance spot welding, so that the welding operation is facilitated, the welding quality is improved, and the welding method is very suitable for welding special-shaped workpieces such as white body tail lamp mounting plates.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a welding device used in an automobile welding production line. Background technique [0002] For the welding of body-in-white in the welding assembly line of the automobile industry, the welding process of resistance spot welding is traditionally adopted. The operation of resistance spot welding is simple, the efficiency is high, and it is convenient to realize flexible production. But now the shape of the car is gradually personalized. While pursuing the personalized shape, the realization of the welding process often becomes more difficult, especially the welding performance of the back door taillight mounting plate (U-shaped, V-shaped parts) of the body-in-white is particularly obvious. ;In order to highlight the unique style of the tail light shape, it is often necessary to sacrifice the welding space necessary for the resistance spot welding process of the tail light mount...

AI Technical Summary

Problems solved by technology

But now the shape of the car is gradually personalized. While pursuing the personalized shape, the realization of the welding process often becomes more difficult, especially the welding performance of the back door taillight mounting plate (U-shaped, V-shaped parts) of the body-in-white is particularly obvious. ;In order to highlight the unique style of the tail light shape, it is often necessary to sacrifice the welding space necessary for the resistance spot welding process of the tail light mounting plate, so that the resistance spot welding process cannot be realized, and only CO 2 Gas shielded welding is used for welding, but the current CO 2 The process of gas shielded welding has the following problems: 1. CO 2 The welding process is difficult to operate, requires high skills of operators, and takes a long time to process; 2. CO 2 The welding deformation of the welding process is large, which has a great impact on the surface quality and dimensional quality of the parts; 3. CO 2 Welding process is easy to produce welding slag and welding burr. In order to avoid affecting the taillight assembly and the appearance quality of the car body, it is necessary to rework the welding slag and welding burr, which will increase the manufacturing cost of the product

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