Consumable electrode type arc welding method and device

Details Consumable electrode type arc welding method and device Consumable electrode type arc welding method and device

1997-09-05

1999-08-17

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21912512, B23K 9022

Patent

active

059389559

ABSTRACT:
Provided is a consumable electrode type arc welding method and device in which stable welding can be performed at a high speed for a welding gap greater than a thickness of a base metal and the like, and welding conditions are automatically changed according to the welding gap along a welding line to perform the stable welding. A first base metal extended vertically and a second base metal which has an upper end positioned in a middle portion of the first base metal and is provided along the first base metal are welded together. The first and second base metals have a thickness of 2.8 mm, and an arc is generated toward an upper end portion of the second base metal from obliquely above on a side opposite to the first base metal. The second base metal is melted to be a part of a weld metal. An amount of the second base metal to be melted is increased or decreased according to a welding gap detected by a laser sensor. The tip of a welding wire generating the arc is rotated at high rotational frequencies as a function of increases in the welding gap. Welding tip rotation provides a centrifugal force sufficient to cause drops of melted metal to be dispersed and deposited on the first base metal so that a weld metal is also formed on the first base metal.

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