Thick plate welding method and welding fixture

Abstract

The invention discloses a thick plate welding method and welding fixture. The welding method includes that step 1, using the welding fixture to clamp two pieces of welding base metal, wherein the lower surfaces of the two pieces of welding base metal are correspondingly propped against each other in an alignment mode, the upper surfaces of the two pieces of welding base metal are arranged at intervals, and a V-shaped groove remains between the right head face of the left base metal and the left head face of the right base metal; step 2, enabling a high-energy beam to irradiate to the lower part of the V-shaped groove from the top end of the V-shaped groove, regulating the focus of the high-energy beam to enable the focus to locate on an intersection line of the two pieces of base metal, enabling a welding gun to move along the welding direction, wherein the part to be welded is molten by means of the high-energy beam, and a weld joint is formed in the lower part of the V-shaped groove; step 3, regulating the acting force and position of the welding fixture on the welding base metal along with the transverse shrinkage of the base metal to shrink the opening of the V-shaped groove between the welding base metal; step 4, repeating the steps 2 and 3 till the welding can be finished after one to three times of continuous welding. The thick plate welding method achieves the aims that micro-deformation is achieved after welding, and the ingredients of the weld joint and base metal are equal.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a thick plate welding method and a welding fixture. Background technique [0002] At present, it is an essential key process in the construction of large national defense equipment such as ships, pipelines, submarines and nuclear facilities. The thickness of these facility components is generally more than 20mm, and generally shows that the space size is relatively large, so at present, only segmented connection can be used. The main welding methods are arc welding, electron beam welding and narrow gap welding under the condition of multiple heat sources, but these welding methods have their own shortcomings. Problems in welding thick plates with existing welding methods are as follows: [0003] 1) Arc welding with filler wire is limited by the welding torch and its own welding characteristics, so welding requires a huge amount of filling, and will produce large welding deform...

AI Technical Summary

Problems solved by technology

[0013] In order to overcome the shortage of continuous wire filling in the existing thick plate multi-pass welding, the present invention provides a thick plate welding method and a welding fixture to achieve the purpose of reducing the amount of wire filling in the welding process

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