Technological method for repairing side wall of stainless steel vehicle body through laser melting

• Main Authors: CAO JINGWEN, WANG YANXIN, TAN CHUNCHAO, ZHANG YANHUI, AI FUCHENG
• Format: Patent
• Language: Chinese; English
• Published: 25.11.2022
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The invention discloses a process method for repairing a side wall of a stainless steel vehicle body by utilizing laser fusion, relates to the field of urban rail transit equipment, and solves the problems that in the actual production process, due to untight clamping, local deformation of a stainless steel plate and the like, an assembly gap is inevitably formed between an upper plate and a lower plate in laser lap welding; in order to solve the problems that due to the fact that the assembling gap is too large, concave defects appear on the surface of a welding seam, and the structural strength of a side wall is seriously affected, optimized parameters are adopted for laser welding, then the section appearance of the welding seam and the pulling and shearing force serve as welding seam quality evaluation standards, and defect samples used for laser repairing are screened out; laser repair welding parameters are determined, and the screened defective samples are subjected to laser repair welding; the repaire