| 摘要 |
PURPOSE:To provide a titled device which can be used commonly for direct welding and indirect welding by constituting retreatably an inner electrode which is made connectable to a work surface facing one chip and is connected to a lower electrode contacting with the other chip. CONSTITUTION:An inner electrode 21 connectable to an inner panel 2 of a work W facing one chip 20a is made retreatable according to need by a driving means 22 consisting of air cylinders 22a, b in a spot welding device which welds the work while sandwiching and pressing the same by means of a pair of the chips provided to a welding gun. Said inner electrode is electrically connected by means of a cable 26 to a lower electrode which contacts with the other chip 20b and supports the outer panel 1 of the work W via an insulating material 24 and a gage 12. Both chips 20a, b are connected to a welding transformer 8 to form a nugget N, by which indirect welding of the work W is accomplished. The electrode 21 is retreated in the stage of direct welding and the work is sandwiched directly by both chips 20a, b, by which the welding is accomplished. |
