| 摘要 |
<p>PROBLEM TO BE SOLVED: To surely weld an article small in calorific capacity to a member large in calorific capacity at the correct position by arranging a welding portion of the article small in calorific capacity on a surface of the member large in calorific capacity, and emitting the arc or the beam toward the welding portion from a rear side of the member large in calorific capacity. SOLUTION: An article (a small article) 2 small in calorific capacity is arranged on a surface of a member (a thin plate) 1 large in calorific capacity. The beam (laser beam) 4 is emitted form a rear side of the member (thin plate) 1 large in calorific capacity toward a welding portion 3. By the radiation of the beam (laser beam) 4, a portion in a narrow range in the vicinity of the welding portion 3 of the member (thin plate) 1 large in calorific capacity is first melted. Then, a portion in a narrow range in the vicinity of the welding part 3 of the article (small article) 2 small in calorific capacity is melted to weld the article to the member. A hole in contact with an end portion of the welding portion 3 is cut in the member (thin plate) 1 large in calorific capacity, and the arc or the beam 4 is preferably emitted to the hole from the rear side of the member (thin plate) 1 large in calorific capacity.</p> |
