PURPOSE: To increase the deposition quantity while welding material being molten sufficiently and to adjust penetration by supplying plural welding wires respectively from plural places, simultaneously, supplying powder for welding and passing an arc via a common constricting nozzle.
CONSTITUTION: Since a means to supply the plural welding wires 7 from the plural places is used, deflection of a main arc 10 and a metal arc 11 is prevented by balancing the arc blow direction of an electric current carried to the respective wires 7. In addition, since a means to supply the powder 9 for welding is used at the same time, the deposition quantity per hour can be rapidly increased and the adjustment of chemical composition of weld metal by metal powder and the deposition of weld metal of a composite alloy by nonmetal powder are facilitated and besides, welding can be performed in compliance with a desire. Further, since the means to pass each arc via the common constricting nozzle is used, a deflection preventing action of the arc can be improved much more.
KATO HIROSHI
MURATA NAOKI
WATANABE MASAHARU
NAKAMURA UICHI
