AC TIG (TUNGSTEN INERT GAS) WELDING MACHINE,申请号JP19850261300-传众专利搜索

AC TIG (TUNGSTEN INERT GAS) WELDING MACHINE

申请公布号：JPS62124076(A)

申请号：JP19850261300

申请日期：1985.11.22

申请公布日期：1987.06.05

申请人：

HITACHI SEIKO LTD

发明人：SHINADA TSUNEO;FUJIWARA KIROKU

分类号：B23K9/073;B23K9/06

主分类号：B23K9/073

摘要：PURPOSE:To conduct the opposite polarity current of a small ratio by constituting the titled welding machine so that a current for circulating from the second constant current power source to the first constant-current power source side is limited by a DC reactor provided on the output side circuit of the first constant current power source. CONSTITUTION:When a transistor 16 is in an off-state, when an electric conduction is being executed from the first constant current power source 1 to an arc load 25, the transistor 16 is set to an on-state for a prescribed time by a signal 18 from a control circuit 17. Also, a pulsative opposite polarity current being larger than a straight polarity conducting until that time is conducted from the second constant-current power source 2, and the opposite polarity current is conducted to the arc load 25 by a short time being shorter than an electric conduction time of the straight polarity current. In this way, a current waveform conducting to the arc load 25 becomes an AC waveform, and the ratio of the opposite polarity current flowing to the arc load 25 is reduced.