| 摘要 |
PURPOSE:To perform exact welding irrespective of a welding condition in arc welding of a narrow groove formed in a welded joint by picking up images, via a respective optical fibers in the forward and backward moving directions of a torch, on an industrial television camera, and controlling the torch so as to copy the weld line derived on said cameras. CONSTITUTION:The images picked up by optical fibers 8, 8' mounted in the forward and backward moving direction of a torch inserted 6 in a narrow groove are formed, through IR filters 9, 9', on cameras 10, 10' and are projected, through amplifiers 11, 11' and a processing part 12, on monitor televisions 14, 14'. The bright lines 4', 4'' of the boundary between the side wall and the narrow groove are projected on the television in the advance direction of the torch 6. The light in signal frames S1, S2 are calculated in a numerical data calculation part 16, and a command is given from the part 12 to a control part 18 which guides the torch 6 so as to move the same along the weld line. The visual and automatic guidance of the torch 6 is made possible by the two fibers 8, 8' irrespective of the moving direction of said torch and therefore always satisfactory welding is accomplished. |
