| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the bead quality of a welding start part in two-wire welding. <P>SOLUTION: A method for starting welding in two-wire welding carried out by generating arc to a welding wire and feeding a filler wire in contact with the latter half of a molten pool, includes: starting the feed Ws of the welding wire (time t3); generating arc to the welding wire (time t4); starting the feed Fs of the filler wire (time t5) with a delay of a first predetermined period Td1 from the time of generating the arc; energizing a predetermined filler wire welding current Iwf when the filler wire contacts the molten pool (time t6); and stopping the energization of the filler wire welding current Iwf at a point of time t7 when a second predetermined period Td2 has elapsed from the filler wire feed starting time. The first predetermined period Td1 can thereby be set shorter than the prior art, and in consequence, the bead quality of the welding start part can be improved. <P>COPYRIGHT: (C)2013,JPO&INPIT |
