| 摘要 |
PURPOSE:To equalize height of a bead, and to improve the characteristic of a joint, by measuring the height of the welding bead, and moving an electronic beam back and forth in the welding advancing direction in accordance with its height. CONSTITUTION:When a weldment 1 is moved at a welding speed and an electronic beam 2 is irradiated, a part of the weldment 1 becomes a molten metal, is pushed and made to flow in the rear of a weld, and is solidified. In this case, height of an excess metal of a wlding bead 4 is measured, and when it becomes higher than constant height, it is deflected in the advancing direction as an electronic beam 2a by an electromagnetic coil 5, and when said height becomes lower, the electronic beam 2 is deflected in the rear in its advancing direction. As a result, magnitude of an interaction of the electronic beam 2 and the molten metal is varied, the molten metal flows, and height of the welding bead 4 is adjusted and becomes constant height. |
