Method of inducing arc generation in arc welding

Details Method of inducing arc generation in arc welding Method of inducing arc generation in arc welding

1995-09-13

1997-05-20

Shaw, Clifford C.

Electric heating

Metal heating

By arc

2191251, 901 42, B23K 906

Patent

active

056309554

ABSTRACT:
A method of inducing arc generation in arc welding between a head of a wire and a workpiece, such that a robot supports a welding torch, thereby causing the head of the wire to be brought near a welding start position on a workpiece. However, if there is a failure to generate an arc between the head of the wire at the position and the workpiece within a predetermined time, at least one cycle is repeated of a sequential retrial motion, in which first the robot is made to move to cause the head of the wire to be moved at a predetermined speed from a position close to the present welding start position to another position away from the position by a predetermined distance, and then the robot is made to move in the opposite direction to cause the head of the wire to be moved at a predetermined speed toward the welding start position. Then, when an arc generation signal is detected during repeated performance of the retrial motion, the retrial motion is stopped, and a predetermined welding for the workpiece is started.

REFERENCES:
patent: 4538047 (1985-08-01), Nakano et al.
patent: 4618760 (1986-10-01), Murch et al.
patent: 4647753 (1987-03-01), Nakashima et al.
patent: 4772776 (1988-09-01), Siina
patent: 4952773 (1990-08-01), Orsos et al.
patent: 5170034 (1992-12-01), Seshimo et al.
patent: 5486679 (1996-01-01), Hamura et al.

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