Multielectrode gas-shielded arc welding method

A gas shielded and arc welding technology, which is applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of increased welding metal amount and convex shape of the weld bead, and achieve the effect of improving the shape of the weld bead and inhibiting sagging

Inactive Publication Date: 2010-06-23
KOBE STEEL LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the welding method described in this patent document, a filler wire is inserted as a method of alleviating the arc interference generated between the leading elect

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Embodiment Construction

[0022] Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. figure 1 and figure 2 It is a schematic front view explaining the multi-electrode gas shielded arc welding method of the embodiment to be invented, image 3 It is a schematic plan view of the same figure. in addition, Figure 4 is a schematic front view showing the shape of the weld bead. On the lower plate 1 arranged horizontally, the vertical plate 2 is vertically arranged, and the corner joint between the lower plate 1 and the vertical plate 2 is subjected to multi-electrode gas shielded arc welding using a plurality of welding wires. This embodiment is two-electrode welding using a leading electrode and a trailing electrode, but the present invention is not limited thereto, and three or more electrodes may be used. In this case, the third electrode and subsequent electrodes can be arranged behind the rear electrode. In this embodiment, the filler wi...

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Abstract

The present application relates to a multielectrode gas-shielded arc welding method in which a filler wire is inserted between leading and trailing electrodes, a distance between the electrodes is 20 to 30 mm. Variables L, T, F, X, Y, alpha, beta, gamma and satisfy the following expressions: 40 DEG <= L<= 60 DEG, 40 DEG <= T <= 60 DEG, X + 5 DEG <= F <= X + 20 DEG or Y - 20 DEG <= F <= Y - 5 DEG, 4 DEG <= alpha <= 14 DEG, 5 DEG <= beta <= 15 DEG, - 5 DEG <= gamma <= 5 DEG, where X represents the larger one of a leading-electrode horizontal angle L and a trailing-electrode horizontal angle T, Y represents the smaller one of the angles, F represents a filler-wire torch angle, alpha represents a leading-electrode backward angle, beta represents a trailing-electrode forward angle, gamma represents a filler-wire torch forward or backward angle. A target position of the filler wire is within a range between a lower end of the vertical plate and a position at a height of (upper leg length - 2 mm) from the lower end. According to the method, the shape of the welding bead can be remarkably improved, the arc noise between the leading and trailing electrodes can be reduced, and the equipment is easy.

Description

technical field [0001] The present invention relates to a multi-electrode gas-shielded arc welding method using a flux-cored wire, and more particularly to a method of supplying a filler wire between electrodes in a multi-electrode 1 molten pool welding construction in which a single molten pool is formed with multiple electrodes Multi-electrode gas shielded arc welding method. Background technique [0002] Conventionally, in order to increase the efficiency of horizontal fillet welding in shipbuilding and bridges, the single molten pool welding construction method among the multi-electrode gas shielded arc welding methods has been adopted. However, in the case of an actual structure, there are various interference factors as follows: (a) too large gap at the fillet weld; (b) too large coating film thickness of the pre-coating primer (shopprimer); (c) ) The current and voltage fluctuations in the factory, etc., lead to the loss of uniformity and stability of the melt (汤流まり)...

Claims

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Application Information

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IPC IPC(8): B23K9/16
CPCB23K9/02B23K9/1735B23K9/14B23K9/16
Inventor 长冈茂雄有田大江原进伊藤和彦
Owner KOBE STEEL LTD
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