Short-circuit transient welding method and system

A technology of short-circuit transition welding and main circuit, which is applied in the field of welding system and gas metal shielded welding, and can solve the problems of arc improvement in the absence of arc burning stage, etc.

Inactive Publication Date: 2018-05-22
BEIJING UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0004] The current control method of short-circuit transition welding is mainly to suppress the input of weld

Method used

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  • Short-circuit transient welding method and system
  • Short-circuit transient welding method and system
  • Short-circuit transient welding method and system

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Embodiment Construction

[0044] The specific implementation manner of the present invention will be described below through application examples.

[0045] A specific application example of the present invention is as image 3 with Figure 4 The short-circuit transition welding system is shown and the short-circuit transition welding waveform is shown.

[0046] The welding system used in this example includes five parts: main current output power supply, high-frequency pulse current output power supply, welding power supply output, control circuit and wire feeding system. The output of the main current output power supply and high-frequency pulse current output power supply passes through the welding power supply The output is connected together to form the main circuit of the welding system and is responsible for the power output.

[0047] The rectification circuit of the main current output power supply is composed of four diodes and filter capacitors. The four diodes can be replaced by an integrat...

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Abstract

The invention relates to a short-circuit transient welding method and a system, which belong to the field of welding power supplies and welding automation equipment. According to the method, on the basis of a welding main current of a welding arcing stage, a high-frequency impulse is overlapped, so that the welding quality is improved by utilizing a high-frequency effect. At a short-circuit stage,a wire feed speed of a wire feeder is changed, so that wire feeding is slowed down; or a welding wire is withdrawn for assisting globular transfer. The invention additionally aims to provide the short-circuit transient welding system for implementing the welding method. The system adopts an alternate wire-feed method, meanwhile, a short-circuit state or an arcing state in a welding process can bedetected, and an appropriate welding current is output. In addition, at an arcing stage, a high-frequency impulse with the frequency being larger than 20kHZ can be overlapped. The researches show that by utilizing an electric arc with a high-frequency effect for welding, the welding stability and the electric arc stiffness can be greatly improved, and in addition, the high-frequency electric archas an effect on refining grains, so that weld microstructures and joint performances are favorably improved.

Description

technical field [0001] The present invention relates to a metal gas shielded welding method, which is implemented by changing the welding current and wire feeding speed during the welding process. The invention also relates to a welding system, which belongs to the field of welding power supply and welding automation equipment. Background technique [0002] Gas metal arc welding is a welding method with low cost, small deformation and easy realization. This welding method is widely used in the field of mechanical processing. In the welding process, there are various ways of droplet transfer, and the way of droplet transfer can usually be changed by changing the welding parameters. Commonly used transition methods include spray transfer, large drop transfer, short-circuit transfer, etc. Among them, the short-circuit transfer method is widely used in thin plate welding, because this transfer method is relatively stable in small current welding. In a short-circuit transition ...

Claims

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Application Information

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IPC IPC(8): B23K9/173B23K9/133B23K9/10B23K9/09B23K9/095
CPCB23K9/091B23K9/0953B23K9/1056B23K9/124B23K9/133B23K9/173
Inventor 黄鹏飞胡伊通田延忠丁斌李庆祥白立来卢振洋
Owner BEIJING UNIV OF TECH
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