| 摘要 |
PROBLEM TO BE SOLVED: To provide a nozzle of a stud welding gun which eliminates short circuit between the nozzle and a bolt due to deposition of sputter on a nozzle inwall of the welding gun when a thick bolt is stud welded by the welding gun. SOLUTION: The nozzle 1 of the stud welding gun 10 is formed to be a widening shape toward the end with increasing bore diameter toward a top end face 5.
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