| 摘要 |
PURPOSE:To obtain an adequate crater bead at the end point of welding in multilayer build-up arc welding, by ending oscillation at the point of the time when a welding torch is reset to the center of the oscillation after the origin at the end of the final layer is detected. CONSTITUTION:The set output 22 of an oscillation pattern corresponding to the combination of materials to be welded is outputted as the set value of the servocontrol mechanism 24 in an oscillation control section 23 from an arithmetic section 21 for an oscillation pattern. The feedback signal 29 for the torch position from a welding head 26 is circulated to the mechanism 24 and an oscillation control output 25 drives the DC motor 27 of the head 26, so that the motor 27 weaves the head 26. The torch position is detected by a linear potentiometer 28. Calculation is accomplished in the section 21 so as to end the set output 22 at the point of the time when the welding torch resets to the center of oscillation after the origin at the end of the final layer is detected. |
