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A circuit for improving the arc striking success rate and stability of inverter argon arc welding machine

A technology of argon arc welding machine and success rate, which is applied in the circuit field to improve the success rate and stability of arc striking of inverter argon arc welding machine, and can solve the problems of burning tungsten needle and low success rate of arc striking, etc., so as to reduce loss , The effect of improving the success rate of arc striking

Active Publication Date: 2020-09-29
SHANGHAI GREATWAY WELDING EQUIP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

If the short-circuit current is too small, the success rate of arc ignition is not high; if the short-circuit current is too large, the tungsten needle will be burned during short-circuit

Method used

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

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0023] Such as figure 1 As shown, the present invention provides a circuit for improving the arc striking success rate and stability of an inverter argon arc welding machine, including: a short-circuit current control circuit, a state judgment circuit and a main circuit;

[0024] The short-circuit current control circuit is connected with the main circuit, and is used to control the output current of the welding machine in the short-circuit state;

[0025] The short-circuit current control circuit is c...

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Abstract

The invention provides a circuit capable of increasing the success rate and improving the stability of arc striking of an inverted argon arc welding machine. The circuit comprises a short-circuit current control circuit, a state judgement circuit and a main loop, wherein the short-circuit current control circuit is connected with the main loop, and used for controlling an output current in a short-circuit state of the welding machine; the short-circuit current control circuit is connected with the state judgement circuit, and used for judging the state of the welding machine; and the main loopis used for controlling the output PWM waveforms. According to the circuit, the PWM waveforms with different duty ratios are output by monitoring the welding state of the welding machine; the problemof low success rate of the arc striking during welding can be solved, the stability of the arc striking is improved, and the loss of a tungsten needle is reduced; and the circuit is simple to operate, and capable of increasing the production efficiency.

Description

technical field [0001] The invention relates to the field of welding equipment electronic circuits, in particular to a circuit for improving the arc striking success rate and stability of an inverter argon arc welding machine. Background technique [0002] Argon arc welding technology is based on the principle of ordinary arc welding, using argon gas to protect the metal welding material, and through high current to make the welding material melt into a liquid state on the base material to be welded to form a molten pool, so that the welded metal and the welding material It is a welding technology that achieves metallurgical bonding of materials, and is currently widely used in industries such as automobiles and shipbuilding. There are usually two ways of high-frequency arc ignition and lifting arc ignition in argon arc welding. Lifting arc ignition is the method of generating arc ignition current when the tungsten needle is short-circuited with the workpiece, and then pulli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/067B23K9/073
CPCB23K9/067B23K9/073
Inventor 方美雄刘纪周张凯高瑞瑞王敏
Owner SHANGHAI GREATWAY WELDING EQUIP
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