| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve welding efficiency by increasing the welding amount of a filler wire in a two-wire welding method for feeding the filler wire to a consumable electrode arc to weld the filler wire. <P>SOLUTION: The two-wire welding method includes: generating an arc between the consumable electrode and a base material to form a molten pool; and welding the filler wire while inserting the filler wire in the latter half part of the molten pool. In the method, the filler wire is weaved back and forth in a welding direction to change the displacement amount Lh of an inserted position of the filler wire in sinusoidal shape, and the feed speed Fw of the filler wire is changed in sinusoidal shape in proportion to the displacement amount Lh. Consequently, when the inserted position of the filler wire is in a forward direction from the center position of weaving, melting of the filler wire is accelerated, and the feed speed Fw of the filler wire is increased, and when the inserted position of the filler wire is in a backward direction, cooling and rising of the molten pool are suppressed, and the formation of a humping bead is suppressed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
