| 摘要 |
PURPOSE:To obtain the welding part of high quality with high efficiency by making a wire current the alternating current electrifying in the same direction and reverse direction as an arc base current. CONSTITUTION:A tungsten electrode 1 and base material 2 are connected by DC arc current 3 and wire power sources 7a, 7b are connected in parallel via a contact tip 6 between the base material 2 and wire 5. The arc current is controlled by a current controlling circuit 11 so as to become the pulse current switching in an arc piece current and arc base current on the arc current 3 and wire power sources 7a, 7b. The wire power sources 7a, 7b as well electrify by a current controlling circuit 11 in the electrifying term of the arc base current with the wire current in the same direction as the arc current and the wire current in the reverse direction to the arc current as the alternating current alternately to the wire 5 with the alternate opening and closing of the wire power sources 7a, 7b. |
