| 摘要 |
PURPOSE:To improve shaping accuracy and working efficiency by irradiating a heat source such as laser beam again to a weld zone upon ending of welding to remelt the surface of the weld zone. CONSTITUTION:A detector 11 for the thickness of materials to be welded and a detector 12 for the thickness of the weld zone are provided just before a laser beam processing head 10 in the moving direction thereof. The build-up height of the weld zone 2 is calculated by a comparator 13 from the difference in the outputs of the detectors 11 and 12. A calculator 15 calculates the irradia tion energy density necessary for remelting the surface of the weld zone 2. The head 10 traces again the weld zone 2 while holding clamps 3, 4 upon ending of welding of the zone 2. The calculated value of the build-up height determined by the comparator 13 is inputted via the calculator 15 to a head driving device 16 by which the weld zone 2 is remelted and shaped by the heat input of the adequate quantity of the energy density. The shaping accuracy and working efficiency are improved by the above-mentioned method. |
