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A three-wire gas-shielded indirect arc welding method, device, surfacing welding method, and narrow gap welding method

An arc welding method and gas shielding technology, which is applied in the field of material processing, can solve the problems that the deposition efficiency and welding efficiency are difficult to further increase, the stability of the welding process cannot be guaranteed, and the parameter range is narrow, so as to solve the problem of insufficient heat input and increase Effect of deposition efficiency and productivity improvement

Active Publication Date: 2017-06-27
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing twin-wire indirect arc welding has certain limitations, that is, not only the range of available parameters is narrow, but also when the current increases to a certain extent, the arc becomes scattered and cannot guarantee the stability of the welding process, deposition efficiency and welding It is difficult to further increase the efficiency

Method used

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  • A three-wire gas-shielded indirect arc welding method, device, surfacing welding method, and narrow gap welding method
  • A three-wire gas-shielded indirect arc welding method, device, surfacing welding method, and narrow gap welding method
  • A three-wire gas-shielded indirect arc welding method, device, surfacing welding method, and narrow gap welding method

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Experimental program
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Effect test

Embodiment 1

[0046] Example 1: three-wire gas-shielded indirect arc surfacing.

[0047] Adopt the welding wire distribution mode a shown in Figure 3, the middle welding wire connected to the same pole of the power supply is vertically downward, the angle between the two side wires and the middle welding wire is 20 degrees, symmetrically distributed on both sides of the middle welding wire, and the three welding wires are in the same The planes intersect at a point. Among them, the three steel welding wires are ER50-6, with a diameter of 1.2mm. The power supply adopts a DC power supply and a pulsed DC power supply, and the corresponding shielding gas is 80% CO 2 and 20% Ar mixed gas; plane surfacing welding was carried out on the Q235 steel plate as the base material, the plate size was 200mm×100mm×5mm, the welding torch height was 10mm, the total welding current was 320A, and the welding speed was 500mm / min. The results showed that Smooth and uniform, well combined with the base metal, an...

Embodiment 2

[0048] Embodiment 2: Narrow-gap gas-shielded three-wire indirect arc welding.

[0049] Such as Figure 4 (in the figure, 1 , to connect the cable; 2 , main wire; 3 , side silk; 4 , base metal to be welded; 5 , back padding. ), the distribution of the welding wire used is that the angle between the middle welding wire and the side wire is 30 degrees, three steel welding wires with a diameter of 1.2mm are used, the welding wire model is ER50-6, the welding base material is Q235 low carbon steel, and the plate size is 200mm×100mm × 20mm; ceramic liner is used on the back, I-shaped gap, butt joint gap is 8mm, the total welding current used is 340A, and the welding speed is 500mm / min, which achieves good side wall fusion. Because of its narrower gap than other methods, it is highly efficient.

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Abstract

The invention discloses a three-wire gas shielded indirect electric arc welding method, a three-wire gas shielded indirect electric arc welding device, an overlay welding method and a narrow gap welding method. The three-wire gas shielded indirect electric arc welding method comprises the following steps that before welding, one welding wire (middle welding wire) of three welding wires is connected with the same electrodes of two electric arc power supplies and is arranged between the two electric arc power supplies; the other two welding wires (side wires) are respectively connected with the other electrodes of the two electric arc power supplies; the side wires are respectively arranged at two sides of the middle welding wire, so that the middle welding wire and the side wires can be intersected on a point; the two electric arc power supplies output simultaneously in a welding process, so that coupled indirect electric arc is generated in the intersected point among the middle welding wire and the side wires; when the coupled indirect electric arc is close to to-be-welded base metal, the coupled indirect electric arc partially melts a to-be-welded workpiece, so that a melting pool is formed with liquid metal which is used for welding wire transition, therefore the welding process is realized. According to the three-wire gas shielded indirect electric arc welding method, the three-wire gas shielded indirect electric arc welding device, the overlay welding method and the narrow gap welding method, the problem of insufficient heat input of twin-wire indirect electric arc welding is effectively solved, and meanwhile the welding wire melting efficiency and the indirect electric arc welding parameter adjustable range are both effectively improved by utilization of the generated coupled indirect electric arc.

Description

technical field [0001] The invention belongs to the technical field of material processing, and in particular relates to a three-wire gas-shielded indirect arc welding method, device, surfacing welding method and narrow gap welding method. Background technique [0002] In modern production, new welding methods play a vital role in improving production efficiency and corporate competitiveness. The key to improving welding efficiency is to increase the cladding efficiency of welding wire, which is mainly determined by the welding current. For conventional arc welding, the power supply is connected between the welding workpiece and the welding wire, so the total current flowing through the welding wire must be equal to the total current flowing through the welding workpiece. Therefore, when increasing the welding current to improve welding efficiency, it will inevitably lead to welding The heat input of the workpiece increases, and the increase of heat input will lead to a ser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/04B23K9/173B23K9/067
CPCB23K9/0213B23K9/04B23K9/0672B23K9/164B23K9/1735
Inventor 刘黎明宋刚王红阳方迪生
Owner DALIAN UNIV OF TECH