| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To achieve the production of a coil at high precision and high efficiency. <P>SOLUTION: The device manufactures a coil 3 by welding U-shaped pipes 2 to both ends of a plurality of straight pipes 1. The device is provided with a laser welding head 11, which uses a condensing lens 15 having a focal length of at least twice the pipe diameter of the pipes to be welded 1, 2 to aim a laser light 13 at, and weld, the joint position w of straight pipes 1, positioned and held on a workpiece setting jig 24, and U-shaped pipes 2, temporarily fitted to both ends of the straight pipes 1, 2. Thus, without using filler wire, the production of a coil can be performed at high precision and at high efficiency. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
