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A circuit for improving the success rate and stability of small current arc ignition of inverter argon arc welding machine

A technology of argon arc welding machine and inverter welding machine, which is applied in the direction of arc welding equipment, welding equipment, manufacturing tools, etc. It can solve the problems that no information has been collected, no explanation or report has been found, and the volume can be reduced and the success rate can be improved. and stable, cost-saving effects

Active Publication Date: 2017-07-11
SHANGHAI GREATWAY WELDING EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there is no description or report of the similar technology of the present invention, and no similar data at home and abroad have been collected yet.

Method used

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  • A circuit for improving the success rate and stability of small current arc ignition of inverter argon arc welding machine
  • A circuit for improving the success rate and stability of small current arc ignition of inverter argon arc welding machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0056] This embodiment provides a circuit for improving the success rate and stability of small-current arc striking of an inverter argon arc welding machine. The circuit part includes a main circuit circuit of the inverter welding machine and an output circuit arc stabilization circuit. in:

[0057] The main circuit circuit of the inverter welding machine adopts a dual-tube single-ended forward topology circuit, which inverts the rectified DC power into high-frequency square wave power, and then rectifies it into low-voltage power required by the inverter welding machine. direct current.

[0058] In the output loop arc stabilization circuit, a capacitor and a switch are connected in series in the output rectified circuit, and the switch is controlled by a control circuit to realize state control of the arc stabilization circuit.

Embodiment approach

[0060] A circuit for improving the success rate and stability of low-current arc ignition of an inverter argon arc welding machine, including a main circuit circuit of an inverter welding machine and an output circuit arc stabilization circuit; wherein:

[0061] The main circuit circuit of the inverter welding machine adopts a double-tube single-ended forward topology circuit, which inverts the rectified DC power of the input AC power into a high-frequency square wave power, and then rectifies it into the low-voltage DC power required by the inverter argon arc welding machine. output;

[0062] The output circuit arc stabilization circuit is connected in series with the main circuit circuit of the inverter welding machine, and is used to control the working state of the inverter argon arc welding machine.

[0063] Such as figure 1 As shown, the dual-tube single-ended forward topology circuit mainly includes:

[0064] The inverter circuit composed of power tubes Q3, Q4, Q5, Q6, ...

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Abstract

The invention provides a circuit for increasing the small current arc striking successful rate and stability of an inverter argon arc welding machine. The circuit comprises an inverter welding machine main loop circuit and an output loop arc stabilizing circuit, wherein a double-tube and single-end forward topology circuit is adopted as the inverter welding machine main loop circuit which inverts direct current obtained after input alternating current is rectified into high-frequency square wave current and then rectifies the square wave current into low-voltage direct current needed by the inverter argon arc welding machine to output the low-voltage direct current; and the output loop arc stabilizing circuit is connected into the inverter welding machine main loop circuit in series and used for controlling the working state of the inverter argon arc welding machine. According to the circuit for increasing the small current arc striking successful rate and the stability of the inverter argon arc welding machine, due to the fact that the measures that the arc stabilizing circuit works during arc striking with small current and arc striking with large current and the arc stabilizing circuit only works with small current in the welding process are taken, the size of the arc stabilizing circuit is greatly reduced, cost is saved, the effect of increasing the small current arc striking successful rate and stability can be achieved, and the circuit is economical and applicable.

Description

technical field [0001] The invention relates to the technical field of inverter argon arc welding machines, in particular to a circuit for improving the success rate and stability of small current arc striking of inverter argon arc welding machines. Background technique [0002] Argon arc welding technology is the fastest growing and most widely used welding technology at home and abroad. In recent years, argon arc welding, especially manual tungsten argon arc welding, has become an indispensable means of welding various metal structures, so the demand for argon arc welders at home and abroad is also increasing, especially welding is easy to oxidize Non-ferrous metals (such as aluminum, magnesium and their alloys), rare metals (such as molybdenum, titanium and their alloys), high-strength alloy steel and some high-alloy steels for special purposes (such as stainless steel, heat-resistant steel). The workpiece to be welded is getting thinner and thinner, which requires that ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/10
CPCB23K9/1056
Inventor 刘纪周李述辉徐德进陈绪强
Owner SHANGHAI GREATWAY WELDING EQUIP
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