Verification method for attitude parameters of toptig welding torch in multi-layer welding of thick-walled pipe butt joints

Abstract

The invention belongs to the field of TOPTIG welding technique methods for a butt pipe fitting of an antenna beam of a high-speed electric multiple unit (EMU), and provides a TOPTIG welding gun posture parameter value verification method for multi-layer welding of a butt joint of thick-walled pipes. The method is characterized in that requisite value ranges of a welding gun posture f (theta, d) for different welding types and value ranges of a corresponding welding gun height h are firstly provided according to work experience; and for any given new group of a welding posture included angle theta value and a welding gun displacement d value, whether the welding gun posture parameters are well selected or not is verified. The method provided by the invention has the advantages that welding technicians can be helped to rapidly evaluate whether the current set welding gun posture parameters are reasonable or not, so that a welding parameter designing method for the multi-layer welding of the butt joint of the thick-walled pipes through the TOPTIG technique is improved and optimized, the welding technique parameter designing efficiency is greatly improved, the rejection rate is reduced, and economic benefits are produced and improved.

Description

Technical field [0001] The invention belongs to the field of TOPTIG welding process methods for butt pipe fittings of antenna beams of high-speed EMUs, and specifically relates to a method for verifying the attitude parameters of a TOPTIG welding gun for multi-layer welding of thick-wall pipe butt joints. Background technique [0002] From the open literature T. Opderbecke, S. Guiheux, Zhang Shilong, etc. TOPTIG process for welding robots[J]. Electric Welding Machine, 2006,36(3):11-15.DOI:10.3969 / j.issn.1001-2303.2006 .03.004. The disclosed TOPTIG welding process is a relatively advanced robot automatic welding process, which is mainly used for thin-wall butt weldments with a thickness of less than 2mm, especially for single-pass welding without bevel thin-walled weldments. Using TOPTIG welding process can realize stable and efficient automatic welding, and obtain very ideal welding seam forming effect. [0003] On the other hand, the circular tube components such as the antenna b...

AI Technical Summary

Problems solved by technology

[0006] However, when applying the TOPTIG process to the multi-layer welding of this thick-walled pipe butt joint, the posture of the welding torch directly affects the heat distribution and the force of the molten pool during the welding process, thereby indirectly affecting the welding quality

However, this effect is difficult to evaluate accurately in advance through its initially given process parameters. The existing evaluation method for weld quality is to use a certain set of welding parameters Execute the standard to carry out quality inspection and process evaluation on the weld to obtain the basis for evaluating whether the welding parameters of this group are qualified or not, including the posture of the welding torch. Therefore, the existing evaluation method for the quality of the weld belongs to the post-verification welding torch Attitude and welding process parameter design methods, the implementation of such post-verification quality assessment control methods is time-consuming, costly and inefficient, which is not conducive to fast and economical design of welding process parameters

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