| 摘要 |
A method of feeding and welding a projection bolt, characterized by comprisi ng the steps of supporting the projection bolt on a holding head (20) attached to a telescoping bolt feeding rod (18), positioning the projection bolt on the telescoping axis of a movable electrode (10) having a bolt receiving hole (1 3) provided therein, stopping the movable electrode when the movable electrode is moved forward and a bolt shaft part is inserted into the bolt receiving hole , and moving the holding head away from the telescoping axis of the movable electrode, whereby the bolt shaft part can be surely inserted into the bolt receiving hole.
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