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Aluminum alloy direct current plasma-tungsten electrode argon arc hybrid welding method based on pulse coordination control

A tungsten argon arc welding and tungsten argon arc technology, applied in the field of aluminum alloy welding, can solve the problems of low effective thermal power, affecting welding quality and efficiency, and rapid electrode burning, achieving good arc stability and ensuring welding seam. The effect of forming quality and low equipment cost

Active Publication Date: 2014-02-12
哈尔滨哈船特装科技发展有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to relevant research, it is also possible to use DC reverse polarity plasma arc for aluminum alloy welding, but the electrode burns too fast, and the low effective thermal power in the welding process also affects the welding quality and efficiency.

Method used

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  • Aluminum alloy direct current plasma-tungsten electrode argon arc hybrid welding method based on pulse coordination control
  • Aluminum alloy direct current plasma-tungsten electrode argon arc hybrid welding method based on pulse coordination control

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specific Embodiment approach 1

[0030] combine figure 1 , which is based on the implementation of pulse-coordinated aluminum alloy DC plasma-reverse connection argon tungsten arc composite welding device. , wire feeder 14, high-frequency arc starter 2 and 7, current signal detector 3, signal processor (PLC or single-chip microcomputer) 4, signal controller 6 and so on. During welding, the argon tungsten arc welding torch 9 and the filler wire 15 can be placed on both the front and rear sides of the plasma torch 12, and can also be placed on the left and right sides of the plasma torch 12 to form a combined plasma-argon tungsten arc welding joint. During the welding process, the current pulse flowing through the plasma arc is detected by the current signal detector 3, and the current pulse of the DC reverse connection tungsten argon arc welding is adjusted through the signal processor 4 and the controller 6, thereby adjusting the oxide film on the surface of the aluminum alloy. The degree of cleaning can be ...

specific Embodiment approach 2

[0037] combine figure 2 , it is based on the implementation of the pulse-coordinated aluminum alloy DC plasma-AC tungsten arc composite welding device. Composed of high-frequency arc starters 2 and 7, current signal detector 3, signal processor 4 (PLC or single-chip microcomputer), signal controller 6, control system 5, capacitor 9, inductor 15, wire feeder 16, etc. During welding, the argon tungsten arc welding torch 10 and the filler wire 17 can be placed on both the front and rear sides of the plasma torch 13, and can also be placed on the left and right sides of the plasma torch 13 to form a plasma-tungsten argon arc composite welding joint. During the welding process, the current pulse flowing through the plasma arc is detected by the current signal detector 3, and the current pulse of the argon tungsten arc is adjusted through the signal processor 4 and the controller 6, thereby adjusting the oxide film cleaning degree of the argon tungsten arc , by changing the peak p...

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Abstract

The invention aims to provide an aluminum alloy direct current plasma-tungsten electrode argon arc hybrid welding method based on pulse coordination control. A tungsten electrode argon arc welding gun is exerted on one side of a plasma arc welding gun, in the welding process, the tungsten electrode argon arc welding gun is utilized to remove oxidation films on the surface of aluminum alloy in front of the direct current plasma welding gun, and the direct current plasma welding gun is utilized to conduct welding behind the tungsten electrode argon arc welding gun. In order to avoid electromagnetic interference between plasma arcs and tungsten electrode argon arcs in the welding process, when a plasma arc current is in a pulse basic value pilot arc stage, a pulse signal controller is triggered, and a tungsten electrode argon arc current is adjusted to be in a negative half wave crest value for removing the oxidation films on the surface of the aluminum alloy; when the plasma arc current is in a pulse crest value welding stage, the pulse signal controller is utilized to adjust the tungsten electrode argon arc current to be in pulse basic value output, and the steps are repeatedly executed in this way. According to the method, the current pulse wave form of the tungsten electrode argon arcs and the current pulse wave form of a plasma arc power supply are reasonably adjusted, the effect of cleaning the oxidation films on the surface of the aluminum alloy and weld penetration are controlled, and therefore weld formation is guaranteed, tungsten electrode burning losses are reduced, and welding efficiency is improved.

Description

technical field [0001] The invention relates to a welding method, in particular to an aluminum alloy welding method. Background technique [0002] Aluminum alloy has light weight, high strength, excellent corrosion resistance, and good economic benefits. Therefore, it has received extensive attention in engineering fields such as automobiles, ships, and aerospace. With the continuous development of industrial needs, aluminum and its alloy materials have become the first choice for industrial production applications. In industrial production and manufacturing, the welding methods are mainly tungsten argon arc welding (TIG) and molten argon arc welding (MIG) for welding aluminum and its alloys. Compared with traditional arc welding, plasma arc welding (PAW) has the advantages of large joint penetration, narrow heat-affected zone, small residual stress and deformation after welding, etc., and shows a good application prospect in the connection of aluminum alloys. In order to ...

Claims

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Application Information

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IPC IPC(8): B23K28/02B23K10/02B23K9/167
CPCB23K28/02B23K2103/10
Inventor 苗玉刚吴斌涛韩端锋李小旭
Owner 哈尔滨哈船特装科技发展有限公司
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