| 摘要 |
PURPOSE: To prevent a doglegged shape of a weld zone by detecting deviations of the directions of the respective butt clamp position widths of strip terminals and correcting the width deviations with a centering device situated at the opposite side of the clamp position with respect to a side guide. CONSTITUTION:In a welding machine incorporating a cutter to butt-weld strips S therein, both the strips S are held 4 so as not to be displaced in the width directions at the holding position H far away from the cutter with respect to the respective precedent strip S1 and subsequent strip S2. The deviation of the center of butt ends of the strips S with respect to the center of a pass line is detected by a sensor 3 at the butt position T close to a line of cut in this state. The strips S are clamped 6 with center guides 5 at the control posi tion E situated at a distance from the holding position H with respect to the butt position T end the tips of the strips S are aligned with the center line by the actuation of a hydraulic cylinder 7. Afterward, the strips are clamped 2 and the ends are out and afterward, both the strips are butt-welded. The doglegged shape of the weld zone is prevented and the inconvenience and dam age in the subsequent winding and forming are prevented.
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