| 摘要 |
A welding location (J12) progresses along a weld path (526) by arranging relative motion between a welding head (W) and workpieces (530). A controller (CTL) controls the actuator to correct transverse deviation of the welding location relative to a target position on the workpieces. A monitoring apparatus comprises a workpiece tracking sensor (T) configured to observe a shape profile of the weld in the vicinity of the welding location and a weld tracking sensor (S) for obtaining a thermal profile of the workpieces, at a location (J14) downstream of the welding location. The apparatus compares observations made by the two sensors (S, T) in a common reference frame (540), 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. |
