Resistance spot welding repairing device and method for stainless steel vehicle body

Abstract

The invention provides a resistance spot welding repairing device and method for a stainless steel vehicle body. The resistance spot welding repairing device comprises a run-on plate and a run-off plate. The run-on plate and the run-off plate are fixedly arranged on the outer side wall, away from a second stainless steel plate, of a first stainless steel plate through clamping pieces, the run-on plate and the run-off plate are symmetrically arranged on the two sides of a to-be-repaired welding spot and are located on the same straight line, grooves are formed in the ends, close to the to-be-repaired welding spot, of the run-on plate and the run-off plate, and the lower edges of the grooves are tangent to the edge of the to-be-repaired welding spot. A base plate is fixedly arranged on the outer side wall, away from the first stainless steel plate, of the second stainless steel plate through a clamping piece, a water inlet and a water outlet are formed in the two ends of the base plate respectively, the water inlet is connected with a water inlet pipe through a water inlet pipe connector, the water outlet is connected with a water outlet pipe through a water outlet pipe connector, and the water outlet pipe is communicated with the water inlet pipe. The resistance spot welding repairing device and method solve the problem of welding deformation of the stainless steel plates of the vehicle body in the repairing process, and the flatness of the surface of the workpiece repaired through the method is not obviously different from that before welding.

Description

technical field [0001] The invention belongs to the technical field of rail vehicle welding, and in particular relates to a repairing device and method for resistance spot welding of a stainless steel car body. Background technique [0002] The resistance spot welding process has been widely used for its advantages of concentrated heat, small welding deformation, high automation efficiency, and low cost without filler metal, especially in the application of rail vehicle stainless steel body welding. There are more than 20,000 to 30,000 solder joints. Due to the workpiece assembly gap, equipment stability and other reasons that affect the quality of the weld seam, it is inevitable that some solder joints will have defects such as burn-through. Usually, the diameter of the burn-through solder joint is about 6-8mm. Small, TIG welding is usually used for repairing, but the weld seam is almost filled at the moment of arcing of the welding torch, the weld seam temperature is too l...

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Problems solved by technology

[0003] In view of this, the present invention aims to propose a repairing device and method for resistance spot welding of stainless steel car body, to solve the problem of repairing defects in resistance spot welding Among them, the welding quality is poor, the deformation after welding is large, and the surface aesthetics after repair is insufficient, etc.

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