| 摘要 |
PURPOSE:To enable a good back bead shape and the uniformity of the front bead with one side welding by finding the welding speed with the input of various welding conditions to an arithmetic unit with controlling an electrode by its movement in the axial direction of the welding electrode and in the width direction of a groove and performing the welding at this speed. CONSTITUTION:A welding electrode 5 is reciprocally rocked in the width direction (X axis) of the inside of a groove 2 and simultaneously moved in the height direction (Y axis) so that the arc length becomes constant. This respective movement is controlled by moving mechanisms 4X, 4Y. The moving width of one cycle of the electrode 5 is detected by a displacement gage 6X and the height of the front bead, a wire speed, groove angle, etc. are inputted into an arithmetic unit 20 together with this detection value. The welding speed is operated from this result and the welding is performed with this welding speed as that of the succeeding cycle. In this way, a stabilized one side welding is enabled, a good back bead is always held and the bead having uniform height of the front bead can be formed.
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