Full-automatic welding method for vertical butt joint of crack arrest steel plates

Abstract

The invention relates to the technical field of ship construction, in particular to a full-automatic welding method for vertical butt joint of crack arrest steel plates. The full-automatic welding method for vertical butt joint of the crack arrest steel plates comprises the following steps that S1, two to-be-welded crack arrest steel plates are in butt joint to form a groove; and S2, a liner is attached to the back face of the groove. And S3, the automatic welding equipment scans the section size of the groove in the length direction of the groove, and corresponding welding parameters are generated according to the section size of the groove. And S4, full-automatic backing welding is conducted according to the generated welding parameters. And S5, after bottoming welding is completed, full-automatic filling welding and full-automatic cosmetic welding continue to be conducted. According to the full-automatic welding method for vertical butt joint of the crack arrest steel plates, full-automatic backing welding is achieved, and the welding efficiency is improved. And meanwhile, a bottoming weld joint can be prevented from cracking, and the welding quality is improved. And moreover, the continuity of the bottoming welding seam is good, welding joints are avoided, carbon gouging repair is not needed, and the welding quality and the welding efficiency are further improved.

Description

technical field [0001] The invention relates to the technical field of ship construction, in particular to a fully automatic welding method for vertical butt joints of crack arresting steel plates. Background technique [0002] In the construction of container ships, during the vertical butt welding of crack arrest steel plates with a thickness of 60mm to 80mm, due to manual assembly errors in the butt placement of the two crack arrest steel plates, manual bottom welding is generally used to ensure bottom welding. seam quality. [0003] Currently, through CO 2 The semi-automatic welding method realizes the vertical butt welding of the crack arrest steel plate, that is, the bottom weld is manually welded, and then the automatic filling welding and automatic cover welding are carried out. The current problems are: [0004] 1) CO 2 Semi-automatic welding needs to prepare CO 2 For welding machines and welding wires, when the bottom welding is completed, the welding wires ar...

AI Technical Summary

Problems solved by technology

[0004] 1) CO 2 Semi-automatic welding needs to prepare CO 2 Welding machine and welding wire, after the bottom welding is completed, put away the welding wire and replace the automatic welding equipment, which takes a long time and is inefficient

[0005] 2) It takes a long time to replace the automatic welding equipment, which not only reduces the fusion degree of the filler weld and the bottom weld, but also because the bottom weld is thin, it is difficult to withstand the welding stress for a long time, and cracks are prone to occur, which affects the weld. overall seam quality

[0006] 3) Affected by manual welding conditions, there is a weld joint in the bottom weld at the artificial temporary arc closing position, which requires carbon planing repair after welding, which further increases the welding workload and reduces the welding efficiency

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