| 摘要 |
PURPOSE:To make easy the adjustment and confirmation of the position of a condenser lens and to improve workability, by storing the position data of said lens corresponding to welding conditions, selecting one welding condition, and controlling automatically the position setting of the condenser lens. CONSTITUTION:If the set position of a condenser lens 1 among the welding conditions of coil materials 6 to be joined is defined as VEF, a comparing and discriminating device 7 discriminates the difference between the same and the present position VBC of the lens 1. The lens 1 can be set correctly simply by moving the same so as to satisfy the conditions VEF=VBC. Setters 8- for welding conditions are provided in conformity with the number of the required conditions according to the kinds of the mateials 6, and the respective values of VBC are empirically determined. Said values are stored as a set voltage VEF in the respective setters 8. In the stage of welding work, one from these conditions is freely fetched according to the conditions of the materials 6 with a selection circuit 9, and the set position of the lens 1 is changed automatically. |
