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Short circuit determination method for electrode fused arc welding

A technology of arc welding and melting electrodes, which is applied in the direction of arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of small judgment margin and misjudgment, and achieve the goal of preventing misjudgment, stabilizing welding state, and high-quality welding Effect

Active Publication Date: 2009-08-26
DAIHEN CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, because the judgment margin becomes smaller, it is in a state where misjudgment is likely to occur.

Method used

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  • Short circuit determination method for electrode fused arc welding
  • Short circuit determination method for electrode fused arc welding
  • Short circuit determination method for electrode fused arc welding

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Experimental program
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Effect test

Embodiment Construction

[0081] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0082] figure 1 It is a waveform diagram showing the welding voltage Vw of the short-circuit judging method of the molten electrode arc welding according to the embodiment of the present invention. In the figure, the solid line represents the welding voltage Vw, and the dotted line represents the short-circuit reference value Vt. This figure is similar to the above Figure 5 Correspondingly, it is a case where the resistance value (Rc+Rx+Rp) is large. In this figure, the short-circuit period Ts from time t1 to t2 can correctly determine the short-circuit state by the conventional short-circuit determination method, so the operation during this period is the same as that of Figure 5 same. Hereinafter, with reference to this figure, the sum after time t2 Figure 5 Describe the different actions.

[0083] The short-circuit reference value Vt is set by the above for...

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Abstract

The invention provides a short circuit judgment method for electrode fused arc welding, by which even the electric cable for welding is long in the electrode fused arc welding, whether the welding filament and the base metal in short circuit status or arc generation status can be accurately determined, and welding of high quality can be executed. A welding voltage (Vw) is compared with a short circuit standard value (Vt), a short circuit status is judged when the welding voltage (Vw) is lower than the short circuit standard value (Vt), while an arc generation status is judged when the welding voltage (Vw) is higher than the short circuit standard value (Vt). The short circuit standard value (Vt) varies according to the welding current value, and an upper limit is set in the arc generation status, which is a function of the welding current. Therefore, error judgment of short circuit status caused by welding voltage sudden decrease after arc generation can be prevented.

Description

technical field [0001] The present invention relates to a short-circuit judging method for melting electrode arc welding for accurately judging the short-circuit state between a welding wire and a base metal. Background technique [0002] In molten electrode arc welding, welding is performed while repeating a short circuit state and an arc generation state between a welding wire and a base metal. In carbon dioxide gas arc welding, metal active gas shielded welding, metal pole inert gas shielded welding, etc., in the small / medium current range below 200A, the short circuit period of about 3~5ms and 10~30ms are regularly repeated. Around the arc during short circuit transition welding. On the other hand, in the high current region, the droplet transfer method from the welding wire is droplet transfer or spray transfer, and a short-circuit period of 1 ms or less occurs irregularly. The case of pulse charge welding is almost the same as that of the high current area. In such ...

Claims

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Application Information

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IPC IPC(8): B23K9/06B23K9/073B23K9/10
Inventor 伊佐太作
Owner DAIHEN CORP
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