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Method for controlling ac pulse electric arc welding

A technology of arc welding and control method, which is applied in the direction of arc welding equipment, welding equipment, manufacturing tools, etc.

Active Publication Date: 2013-12-04
DAIHEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the larger size of the droplet is pushed to the molten pool by the strong arc force generated by the electrode positive polarity peak current Ip with a large current value, so the transition will be carried out without sputtering.

Method used

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  • Method for controlling ac pulse electric arc welding
  • Method for controlling ac pulse electric arc welding
  • Method for controlling ac pulse electric arc welding

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Embodiment Construction

[0028] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0029] The welding current waveform of the AC pulse arc welding control method according to the embodiment of the present invention is different from the above-mentioned Figure 4 same. That is, there are cases where the electrode negative polarity base period Tbn → the electrode negative polarity peak period Tpn → the electrode positive polarity peak period Tp → the electrode positive polarity base period Tb is one pulse period Tf, and the electrode negative polarity base period The case where Tbn→electrode negative polarity peak period Tpn→electrode positive polarity peak period Tp is taken as one pulse period Tf. However, in the present embodiment, the welding current waveform when a short circuit occurs during the electrode negative polarity peak period Tpn is different from the conventional art, and will be described below.

[0030] figure 1 is in the above Fig...

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Abstract

The invention provides a method for controlling AC pulse electric arc welding, which is intended to maintain a stable welding state even an electrode negative polarity current ratio is set to be a large value in sacrificial electrode AC pulse electric arc welding. Therefore, a background current is powered during the electrode negative polarity base value, an electrode negative polarity peak current (Ipn) is powered during the electrode negative polarity peak value (Tpn), a peak current is powered during the electrode positive polarity peak value, a background current is powered during the electrode positive polarity base value. A short circuit occurs during the electrode positive polarity peak value. When a value of a short circuit generating time point relative to a molten drop dimension is lower than a reference value , the current during the short circuit is added, and when the value relative to the molten drop dimension is larger than the reference value, the value is converted in the electrode positive polarity peak value period at the short circuit generating time point. Therefore, molten drop transition is smoothly performed irrespectively with the molten drop dimension, thereby maintaining the stable welding state.

Description

technical field [0001] The present invention relates to an AC pulse arc welding control method capable of obtaining a stable welding state even if the electrode negative polarity current ratio is set to a large value. Background technique [0002] In AC pulsed arc welding, welding is performed by repeating energization of a peak current and a base current during an electrode positive polarity period, and energization of a base current during an electrode negative polarity period as one cycle. In this AC pulse arc welding, by adjusting the electrode negative polarity period, the ratio of the current of the electrode negative polarity period to the average value of the welding current, that is, the electrode negative polarity current ratio can be changed, thereby controlling the heat input to the base metal. . Therefore, low heat input welding can be realized, and high-quality thin-plate welding can be performed. In addition, by changing the electrode negative polarity curre...

Claims

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Application Information

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IPC IPC(8): B23K9/095
Inventor 盐崎秀男惠良哲生
Owner DAIHEN CORP
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