Multielectrode gas-shield arc welding method and device

A shielded arc and multi-electrode technology, applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve problems such as welding defects in welded parts, achieve reliable stability, excellent weld bead appearance and shape, and increase productivity Effect

Active Publication Date: 2013-08-21
KOBE STEEL LTD
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  • Application Information

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Problems solved by technology

Therefore, a welding defect occurs on the welded part until the state returns to the short circuit again.

Method used

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  • Multielectrode gas-shield arc welding method and device
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  • Multielectrode gas-shield arc welding method and device

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Embodiment Construction

[0139] Hereinafter, modes for implementing the multi-electrode gas-shielded arc welding method and the multi-electrode gas-shielded arc welding apparatus of the present invention will be described in detail with reference to the drawings as appropriate.

[0140] First, a multi-electrode gas-shielded arc welding device will be described, and then a multi-electrode gas-shielded arc welding method will be described.

[0141] "Multi-electrode gas shielded arc welding device"

[0142] Such as figure 1 , 2 As shown, a multi-electrode gas shielded arc welding device S (hereinafter, appropriately referred to as a welding device S) includes a preceding gas shielded arc welding electrode 11 (hereinafter, appropriately referred to as a leading electrode 11) and a subsequent gas shielded arc welding electrode 21 (hereinafter, It is appropriately referred to as a subsequent electrode 21 ), and an intermediate electrode 31 is further provided between the preceding electrode 11 and the sub...

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Abstract

The invention provides a multielectrode gas-shield arc welding method and a multielectrode gas-shield arc welding device. A welding pass can be good in appearance, the shape of the welding pass is prevented from deforming and the stability of a fusing metal accummulating portion can be achieved even if high-efficiency welding by three electrodes is performed. The multielectrode gas-shield arc welding method is a method using the multielectrode gas-shield arc welding device (S) which comprises a first electrode (11), a follow-up electrode (21) and a central electrode (31) between the first electrode (11) and the follow-up electrode (21). The multielectrode gas-shield arc welding methos is characterized in that the distance between the first electrode (11) and the follow-up electrode (21) is set to be 15mm to 50mm, direct currents with reversed polarities flow across the first electrode (11) and the follow-up electrode (21), and alternate currents with the fixed current characteristics or decreasing characteristics are made to flow across the central electrode (31) for welding.

Description

technical field [0001] The present invention relates to a multi-electrode gas-shielded arc welding device including a preceding gas-shielded arc welding electrode, a subsequent gas-shielded arc welding electrode, and an intermediate electrode, and a multi-electrode gas-shielded arc welding method using the multi-electrode gas-shielded arc welding device. Background technique [0002] In welding, the multi-electrode arc welding method is effective in order to increase the efficiency of welding work. Therefore, for example, a three-electrode arc welding control method is proposed in Patent Document 1, which can achieve higher efficiency than the conventional two-electrode arc welding control method. However, since the arc currents flowing in parallel interfere with each other due to the magnetic field generated by the currents, the arcs are deflected, so the shape of the weld bead is disturbed, and the high-efficiency construction lacks stability. [0003] Therefore, for exam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K9/095
CPCB23K9/073B23K9/095B23K9/164B23K9/1735
Inventor 横田泰之古川尚英
Owner KOBE STEEL LTD
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