| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform welding in such a manner that welding quality is not affected, and to reduce welding residual stress. Ž<P>SOLUTION: In the welding equipment which is moved by a welding head 1 mounted with a welding torch 2 and having wheels 3 to a welding direction, the welding torch 2 is arranged at the front in the moving direction of the wheels 3, a cooling caterpillar 4 is fitted to the wheels 3, and the weld heat-affected zone of a base material directly after melting is indirectly cooled by the cooling caterpillar 4, so as to reduce residual stress. The cooling caterpillar 4 is fitted over the two wheels 3 located before and after the moving direction of the welding head 1. Each wheel 3 has a hollow structure to flow a cooling medium. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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