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A control method and control system for arc ignition of an inverter manual arc welding machine

A technology of manual arc welding and control system, which is applied in the direction of arc welding equipment, manufacturing tools, welding equipment, etc., and can solve the problems of insufficient precision and accuracy

Active Publication Date: 2021-08-20
SHANGHAI HUGONG ELECTRIC WELDING MACHINE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an arc ignition control method and control system for an inverter manual arc welding machine, which solves the problem of the arc starting current (including thermal arc ignition, thrust and Given) the problem that the control is not fine and accurate enough, it has achieved the effect of fine and accurate control of the arc ignition of the inverter manual arc welding machine

Method used

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  • A control method and control system for arc ignition of an inverter manual arc welding machine
  • A control method and control system for arc ignition of an inverter manual arc welding machine
  • A control method and control system for arc ignition of an inverter manual arc welding machine

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Effect test

Embodiment 1

[0038] Embodiment 1: A method for controlling the arc ignition of an inverter manual arc welding machine, providing a pulse thermal arc ignition signal to a given circuit of the inverter manual arc welding machine power supply, so that the welding current of the inverter manual arc welding machine power supply Become the pulse square wave arc striking current, after the power supply of the inverter manual arc welding machine successfully strikes the arc, turn off the pulse thermal arc striking signal, restore the normal welding current, the arc burns normally, and complete the arc striking.

[0039] Use the pulse thermal arc signal to finely and accurately control the arcing current (including thermal arc, thrust and reference) of the inverter manual arc welding machine when welding thin plate workpieces.

[0040] Such as figure 1 As shown, the pulsed thermal arc ignition signal is a gradual change of N pulse signals at different given values ​​of thrust current and welding cu...

Embodiment 2

[0043] Embodiment 2: as figure 2 As shown, an arc ignition control system for an inverter manual arc welding machine includes: a voltage setting unit 1, a pulse thermal arc ignition unit 2, a welding machine voltage sampling unit 3, a welding machine current sampling unit 4, and a one-way conduction unit 5 , switch unit 6, operational amplification unit 7 and PWM control unit 8;

[0044] The voltage given signal provided by the voltage setting unit 1, the pulsed thermal arc signal provided by the pulse thermal arc starting unit 2 and the current negative feedback signal provided by the welding machine current sampling unit 4 are superimposed and summed and passed through the operational amplification unit 7. Control the pulse width of the PWM control unit 8 so that the power supply of the inverter manual arc welding machine can quickly generate an arc between the workpiece and the welding rod when the welding rod touches the workpiece. At this time, the welding machine voltag...

Embodiment 3

[0045] Embodiment 3: as image 3As shown, the difference from Embodiment 2 is that the pulse thermal arc striking unit 2 includes: a sawtooth wave generating unit 21, a frequency adjusting unit 22, a duty cycle adjusting unit 23 and a first comparator unit 24; The sawtooth wave generation unit 21 is connected to the frequency adjustment unit 22, and the frequency adjustment unit 22 and the duty ratio adjustment unit 23 are respectively connected to the two input terminals of the first comparator unit 24, and the first comparator The output end of the unit 24 is used as the output end of the pulse thermal arc striking unit 2 .

[0046] The frequency and duty cycle of the pulsed thermal arcing current signal can be controlled by the frequency adjustment unit and the duty ratio adjustment unit to obtain different arcing currents suitable for thin and thick plates.

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Abstract

The present invention relates to a control method and control system for arc ignition of an inverter manual arc welding machine. The welding current of the welding power supply becomes the pulse square wave arc ignition current. After the arc ignition of the inverter manual arc welding machine power supply is successful, the pulse thermal arc ignition signal is turned off, and the normal welding current is restored, and the arc burns normally. strike the arc. The invention is suitable for welding plates of different thicknesses, especially suitable for manual arc welding of thin plates, and has the characteristics of easy arc starting, high arc starting success rate, good welding shape, difficult welding deformation and high welding strength.

Description

technical field [0001] The invention relates to the field of inverter welding machines, in particular to an arc striking control method and control system for an inverter manual arc welding machine. Background technique [0002] With the wide application of inverter manual arc welding machines, the market competition is becoming increasingly fierce, and performance and cost have become two important factors of competition; the power supply of inverter manual arc welding machines should generally be used in medium and thick plate welding. In order to increase the strength, both It is realized by the method of swinging the welding rod. [0003] The disadvantage of the existing technology is that current inverter manual arc welding machines use arc ignition to superimpose one thrust and thermal arc ignition current at a time. However, if the current is too large, it is easy to weld through the workpiece; if the current is too small, the arc cannot be ignited. ; In a word, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/067B23K9/09
CPCB23K9/0671B23K9/093
Inventor 不公告发明人
Owner SHANGHAI HUGONG ELECTRIC WELDING MACHINE MFG
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