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Double sides double arc welding method

A double-sided, double-arc, welding method technology, applied in welding equipment, arc welding equipment, edge parts of workpieces, etc., to reduce welding deformation, shorten engineering construction period, and ensure welding quality.

Active Publication Date: 2007-08-08
中国船舶集团渤海造船有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to cancel the carbon arc gouging process, improve welding efficiency, avoid welding deformation, reduce residual stress, and realize the double-sided double-arc welding welding method of automatic welding

Method used

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  • Double sides double arc welding method

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Effect test

Embodiment 1

[0042] For the double-sided double-arc welding method, the fillet seam welding process is as follows: both workpiece 1 and workpiece 2 to be welded use steel plates with a thickness of 35 mm. The double-sided symmetrical welding groove 3 is processed on the workpiece 1, and the blunt edge 5 of the tip is 1mm. The type of the double-sided symmetrical welding groove is shown in Figure 1. 50°, and then use the special tooling fixture to position, the gap between the positioned workpiece 1 and workpiece 2 is not greater than 2mm. Before welding, grind the double-sided symmetrical welding groove 3 and the surfaces on both sides within 30 mm, and clean the groove and the surfaces on both sides of the groove with acetone. Two welders use two welding torches 4 on two welding machines to start arcs on both sides of the workpiece 1 for flat fillet welding. First, double-sided double-arc bottom welding is used. Connect to direct current, positive polarity, welding current 180A. Gas tun...

Embodiment 2

[0044] Double-sided double-arc welding method, the implementation of the butt seam welding process is as follows: the workpiece 1 and the workpiece 2 to be welded are both steel plates with a thickness of 40mm, and the double-sided symmetrical welding groove 3 is processed on the workpiece 1 and workpiece 2. The blunt edge 5 of the upper part is 0.8mm, and the type of double-sided symmetrical welding groove is shown in Figure 2. After the assembly of the workpiece 1 and the workpiece 2, the angle between both sides is 55°, and then the special tooling fixture is used for positioning. The gap between it and workpiece 2 is 1 mm. Before welding, grind the double-sided symmetrical welding groove 3 and the surfaces on both sides within 30 mm, and clean the groove and the surfaces on both sides of the groove with acetone. Two welders use two torches 4 on two welding machines to start arcs on both sides of the workpiece for vertical welding respectively. First, double-sided double-ar...

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Abstract

The invention relates to a double side dual-arc welding method. It includes the following steps that the work-piece connection part waited for welding is made both sides welding groove; the both sides welding groove and its both sides surface is ground and cleaned out before the welding; the two independent electric arcs elicited by two welding guns of the two welding machines are conducted both sides dual-arc symmetry bottoming welding respectively at the both sides welding groove; after the bottoming welding, the two independent electric arcs are conducted both sides dual-arc filling welding respectively at the both sides welding groove. The invention avoids the carbon arc-air gouging back gouging process, simplifies the welding process, so that the automation welding can be realized. It avails to practice gas shielded welding, ensure the welding quality, reduce the welding deformation, and decrease joint stress. The method can apply to important metal structural parts welding.

Description

(1) Technical field [0001] The invention relates to a welding process, in particular to a double-sided double-arc welding method for a butt or fillet weld that needs to be welded on both sides. (2) Background technology [0002] For the butt or fillet welds of various products known at present that require penetration and can be welded on both sides, the welding process used is to weld one or one side of the weld first, and then use carbon arc gouging The method of cleaning the root or planing the groove on the other side, and then welding the weld on the other side or the other side has the disadvantages of low welding efficiency, long welding cycle, large welding deformation and stress, and greatly affected welding quality. Influence, can not meet the quality requirements of important structural parts. (3) Contents of the invention [0003] The technical problem to be solved by the present invention is to cancel the carbon arc gouging process, improve welding efficiency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/02B23K9/235B23K9/173B23K33/00
Inventor 刘殿宝魏博雷兆峰韩永庆高峰
Owner 中国船舶集团渤海造船有限公司
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