| 摘要 |
<p>A welding location progresses along a weld path by arranging relative motion between a welding head and workpieces. A controller controls the actuator to correct transverse deviation of said weld location relative to a target position on said workpieces. A monitoring apparatus comprises a workpiece tracking sensor configured to observe a shape profile of the workpieces in the vicinity of the welding location and a weld tracking sensor for obtaining a thermal profile of the workpieces, at a location downstream of the welding location. The apparatus compares observations made by the two sensors in a common reference frame, to detect and correct transverse deviation of the welding location relative to a target position on the workpieces. The apparatus may be applied in a spiral pipe mill.</p> |
