Rapid welding device and method for automatically aligning welding joint of thick-wall metal longitudinal welded pipe

Abstract

The invention relates to the field of welded pipe processing equipment, in particular to a rapid welding device and method for automatically aligning a welding joint of a thick-wall metal longitudinal welded pipe. The rapid welding device for automatically aligning the welding joint of the thick-wall metal longitudinal welded pipe comprises a welding main machine, wherein multiple sets of roller support mechanisms are arranged at the inlet side and the outlet side of the welding main machine separately, and the welding main machine is used for achieving feeding and discharging of welded pipe blanks; a chain conveying mechanism is further arranged at the inlet side of the welding main machine, so that feeding of the welded pipe blanks can be assisted through a roller conveyor chain; multiple sets of welding joint adjusting mechanisms are further arranged at the inlet side of the welding main machine and used for driving the welded pipes to rotate in the radial direction, so that the positions of grooves of the welded pipes can be adjusted, and the welding joints face upwards. Multiple rounding mechanisms are arranged to conduct roundness correction on the to-be-processed pipe blanks, meanwhile, the rounding mechanisms can adjust the circumferential position and the pressing depth according to actual requirements, and flexible adjustment is conducted according to the pipe diameters and dislocation defect conditions of the pipe blanks.

Description

technical field [0001] The patent of the invention relates to the field of welded pipe processing equipment, in particular to a device and method for automatic alignment of weld seams of thick-walled metal straight seam welded pipes. Background technique [0002] The metal plate is pre-bent into a similar circle through the bending machine, and then the pressure die is applied from the outside of the steel pipe to force the steel plate to bend further and close the gap, and then pre-solder the spot on the gap at intervals. Thereby, the preliminary forming operation of the steel pipe is completed. However, after the steel pipe is bent into a circular shape, there are often misalignment defects such as peach shape, apple shape, and misalignment, which have a great impact on the welding quality. Head structure (seven indenters, nine indenters, twelve indenters), for the four indenter structure, the two butt edges are prone to misalignment, resulting in welding can not be carri...

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Problems solved by technology

However, after the steel pipe is bent into a circular shape, there are often misalignment defects such as peach shape, apple shape, and misalignment, which have a great impact on the welding quality. Head structure (seven indenters, nine indenters, twelve indenters), for the four indenter structure, the two butt edges are prone to misalignment, resulting in welding can not be carried out in the same plane, especially thick-walled pipes are more difficult to control However, the above problems need to be corrected by manual intervention; while the traditional multi-pressure head structure joint device adopts fixed pressure heads, and the structure of the pressure heads is fixed and evenly distributed on the frame, and the same pressure point is used to apply pressure to different types of misalignment. In production, due to the different types of misalignment, the position of the required indenter needs to be adjusted according to the misalignment of the weld seam, which is contrary to the principle of traditional equipment, and it is difficult to effectively correct the misalignment defect; in addition, the traditional seam joint device adopts manual spot welding after seam joint Welding of high-quality pipes requires a lot of manual uninterrupted operations, which not only has a large workload and low efficiency, but also makes it difficult to ensure consistent welding quality of the finished pipes. At the same time, due to equipment space problems, workers must ride on the pipe body during manual pre-welding. low safety factor

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