| 摘要 |
PURPOSE:To enable to adjust variation of heat capacity of a weld zone by a method wherein a specific metal cooling tool, which encloses the conductor end section of a rotor to be joined to an end ring, is employed. CONSTITUTION:On a peripheral surface 2a of a circular end ring, a rotor conductor end secting 1 is joined, they are arranged concentrically and a U-shaped metal cooling tool is inserted to the rotor conductor end section 1 in such way that the rotor conductor end section 1 will be covered when a welding is performed. As the quality of material of a metal cooling tool 3, carbon, copper or iron, etc., for example, of a prescribed material is used and also their exterior measurements are selected at the prescribed values, thereby enabling to adjust variation of heat capacity at a welding zone of the end ring 2 and the rotor conductor end section 1 and to perform a stabilized welding. |
