Welding method for reducing on-site welding stress deformation of thick-wall steel structure

• Main Authors: PAN XIAOFU, GU SHILING, LI SHANQING, LIU ZHU, LI HAO, ZHANG NAN
• Format: Patent
• Language: Chinese; English
• Published: 23.05.2023
• 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 welding method for reducing on-site welding stress deformation of a thick-wall steel structure, which is applied to the field of welding. According to the welding method, a bottom plate with a pipe fitting tool, a pipe fitting clamp, a signal lamp, a control unit, a telescopic air cylinder and a push rod is matched with a sliding seat with a clamping mechanism, a door frame and an adjusting bolt; through relative displacement adjustment of the sliding seats, the use requirement for welding thick-wall ring pieces at the ends of thick-wall pipe fittings with different lengths can be met, the applicability is high, the relative distance between the thick-wall ring pieces can be adjusted in advance, rapid clamping and locking are conducted through the clamping mechanism, then the stress deformation phenomenon in the thick-wall pipe fitting welding process is avoided, and the welding quality is improved. The welding size deviation caused by shortening of the relative distance after the th