Patent ID: 6420671
Filing Date: 2002-07-16
Classification: B23K

Abstract:
In a welding apparatus for positioning and welding two parts of component metal fitting formed with a plurality of penetration holes spaced in circumferential direction in manufacturing automotive parts,the welding apparatus having support tables to support two parts of component metal fitting to be welded, positioning pins provided standing on the support table in positions corresponding to a plurality of penetration holes possessed in the two parts of component metal fitting and to be fit with the penetration holes, a lower electrode provided to hold the two parts of component metal fitting at joining portions thereof, and an upper electrode vertically movably provided in a position above the lower electrode, the positioning pin having an upper end formed in a tapered form, the pin being supported to be elastically pressed down by spring means, the tapered upper end being to be pressed down from a projection state in a position above the penetration hole of the part of component metal fitting held by the lower electrode, and urging means provided to press down the pin against the spring means separately from the upper electrode.