High-efficiency single-pass one-side welding with back formation method for moderately thick plate butting

A technology of single-sided welding and double-sided welding, which is applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of high welding cost, high labor intensity of welders, and low welding efficiency, so as to improve welding efficiency and save Weld filler material, effect of quality improvement

Active Publication Date: 2014-02-05
DALIAN UNIV OF TECH
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Problems solved by technology

[0012] In response to the above problems, the present invention researches and designs a high-efficiency welding method for single-pass single-side welding and double-sided forming of medium-thick plates to solve the problem of low welding efficiency and labor-intensive welding of medium-thick plates in existing methods for butt welding of medium-thick plates. Disadvantages of high strength and high welding cost

Method used

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  • High-efficiency single-pass one-side welding with back formation method for moderately thick plate butting
  • High-efficiency single-pass one-side welding with back formation method for moderately thick plate butting

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Embodiment 1

[0054] Example 1, such as figure 1 and figure 2 As shown, taking the butt weld of Q235-B plate with a plate thickness of 16mm as an example, the welding process of the butt weld is as follows:

[0055] (1) A single-sided welding groove 2 is processed on the workpiece I1 and workpiece II4, and the blunt edge 5 of the tip is 0.7-1.5mm. The angle formed by the assembly of the workpiece I1 and the workpiece II4 is 30°, and the spot welding is used for positioning , the gap between the positioned workpiece I1 and workpiece II4 is 0.5mm-1.5mm.

[0056] (2) Before welding, grind the single-sided welding groove 2 and the surfaces on both sides within 30mm, and clean the welding groove and the surfaces on both sides of the groove with acetone.

[0057] (3) Combining the respective welding torches on the gas metal arc welding machine and the argon tungsten arc welding machine at a certain angle α and a certain distance h, wherein the angle α is 30°-40°, and the length of h is 20mm -...

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Abstract

The invention discloses a single-pass one-side welding with back formation method for moderately thick plate butting. The method comprises the following technical steps: (1) fabricating one-side welding grooves at connection parts of workpieces to be welded, (2) leading out two arcs for composition via gas metal arc welding and non-gas metal arc welding to realize double-arc composite heat source backing welding of the moderately thick plate butting, (3) after a double-arc composite heat source backing welding arc is ignited, performing high deposition filler wire capping through the gas metal arc welding in a position behind the arc by a certain distance L, and (4) and accomplishing one-time one-side filling welding for the moderately thick plate butting via multi-heat-source composition. The single-pass one-side welding with back formation method for the moderately thick plate butting improves welding efficiency, reduces welding deformation and residual stress, improves quality of welding joints, and is a novel high-efficiency welding method integrating the automatic double-arc composite heat source backing welding and the multi-wire multi-arc gas metal arc welding.

Description

technical field [0001] The invention relates to the technical field of material engineering welding, and relates to a new type of high-efficiency welding method that combines double-arc compound heat source bottoming welding and multi-wire multi-arc filling wire with large deposition amount and high-efficiency filling welding for butt weld welding of medium-thick plates. Background technique [0002] At present, due to the large-scale and heavy-duty equipment in shipbuilding, ocean engineering, pressure vessels, heavy machinery and other industries, especially the rapid increase in the use of large metal structures, the application of butt welding of medium and thick plates is becoming more and more common, which causes welding The substantial increase in workload, coupled with the increase in welding production labor costs, has put forward higher and higher requirements for welding production efficiency. High-efficiency welding technology has become one of the key technologi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/235
CPCB23K9/0026B23K9/16B23K9/167B23K9/173B23K9/235B23K2101/185
Inventor 刘黎明王红阳张兆栋任大鑫周彦彬
Owner DALIAN UNIV OF TECH
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