GMAW horizontal welding method for board with large thickness

A large thickness plate, horizontal welding technology, applied in welding medium, welding equipment, welding equipment and other directions, can solve the problem of low efficiency, achieve the effect of small cross-sectional area, improve efficiency, and high welding efficiency

Active Publication Date: 2014-05-14
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pulse welding requires a special pulse welding machine, and ordinary DC welding machines cannot meet the conditions of pulse welding
And the above method can only be used for single-wire welding, and the efficiency is low

Method used

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  • GMAW horizontal welding method for board with large thickness
  • GMAW horizontal welding method for board with large thickness
  • GMAW horizontal welding method for board with large thickness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Object of implementation: This specific embodiment is used for the welding of two Q345 thick steel plates of 300mm*100mm*50mm.

[0063] Implementation device: such as Figure 9 As shown, it is a structural schematic diagram of the welding platform adopted by the present invention. In the figure, 1 is a welding power supply, specifically a Panasonic full-digital gas shielded welding machine YD-500GR3 model welding machine, 2 is a JM53 model solid core welding wire, and 3 is a Q345 thickness Board, 4 is a PC, 5 is a signal acquisition circuit, 6 is a current sensor, and 7 is a voltage sensor. The DC reverse connection method is adopted, the welding wire is connected to the positive pole, and the base metal thick plate is connected to the negative pole. The two welding power sources can independently set the rated welding voltage and welding current. At the same time, the real-time signal acquisition of current and voltage is carried out during welding, and the data are tr...

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Abstract

The invention provides a GMAW horizontal welding method for a board with a large thickness. A horizontal welding groove of the board with the large thickness is designed in the mode that the depth is 60 mm and the angle of a small groove on the root is 45 degrees, the whole groove is divided into a root welding zone, an upper wall welding zone, an upper interlayer welding zone, a lower wall welding zone, a lower interlayer welding zone and a cover surface zone in terms of welding zones, and regulation angles of welding guns of different zones are regulated. Meanwhile, arc voltage and current welding conditions are given so as to obtain qualified weld joints and welding sequences of single wires and twin wires are regulated in welding. According to the method, the qualified weld joints without the situation that a weld pool flows down and with a good penetration degree can be obtained at a low cost, and welding efficiency can be remarkably improved.

Description

technical field [0001] The invention relates to the field of multi-wire GMAW thick plate welding, in particular to a GMAW horizontal welding method for large thickness plates. Background technique [0002] Compared with flat welding and vertical welding, the most important thing in horizontal welding is the defect of molten pool dripping caused by the change of the spatial position of the molten pool. Aiming at this problem, A.Tridia et al. (A.Tridia, F.Roger, J.Schroeder, E.Guyot, T.Marlaud. On the effects of gravity and sulfur content on the weld shape in horizontal narrow gap GTAW of stainless steel [J].Journal of Materials Processing Technology.2013(7):1128-1138.) studied the monofilament TIG horizontal welding of stainless steel, and controlled the molten pool to flow down by adjusting the element composition; Wang Huixia et al. (Wang Huixia, Wang Jun, Hu Yunyan, Wang Dianlong. Research on Double-pulse MAG Horizontal Welding Process[J]. Casting Technology. 2009,30(1):9...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/235B23K33/00
CPCB23K9/16B23K9/235B23K33/00B23K35/383B23K2101/18
Inventor 张菁李芳叶定剑吴东升顾煜华学明曹能
Owner SHANGHAI JIAO TONG UNIV
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