| 摘要 |
<p>Provided is a cooling ring (30) for welding used to manufacture a bellows (100) including a plurality of pairs of barriers (10, 20), each pair formed of a first barrier (10) and a second barrier (20) disposed to face the first barrier (10). The cooling ring (30) includes a body (35) formed as a circular arc shape, disposed to attach the first barrier (10) and the second barrier (20) closely to each other while being in contact with at least one of the first barrier (10) and the second barrier (20), the body (35) including copper and a plating layer (36) plating the body (35). The plating layer (36) includes at least one selected from the group consisting of nickel and chrome. Since the cooling ring (30) includes the body (35) having the circular arc shape including copper and the plating layer (36) plating the body (35), it is possible to prevent powder of a metal having high electrical conductivity, such as copper, aluminum, gold, and silver, during a welding process.</p> |
