| 摘要 |
According to the present invention, an upper electrode and a lower electrode electric resistance welding a preceding material and a following material; and an error correcting unit correcting a deviation by moving the lower electrode in an axial direction with a first correcting unit which has a horizontal correction motor, a screw connected to a rotating shaft of the horizontal correction motor, and a moving block connecting a gap between a rotating shaft of the lower electrode and the screw. |
