Patent ID: 11890694
Assignee: NIPPON STEEL CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B  C  F | IPC B  C  F

Claim 1:
2. A method for manufacturing a welded structure using the resistance spot welding apparatus according to claim 1, comprising:
overlapping two or three steel sheets,
sandwiching the steel sheets between the first rod-shaped electrode body and the second rod-shaped electrode body,
pressing the first rod-shaped electrode body, the second rod-shaped electrode body, the first ring-shaped member, and the second ring-shaped member against the steel sheets, and
applying an electric current between the first rod-shaped electrode body and the second rod-shaped electrode body, wherein
the pressure of the first rod-shaped electrode body and the second rod-shaped electrode body are applied onto the steel sheets by the spot welding gun directly,
the pressure of the first ring-shaped member is applied onto the steel sheets by the first compression coil spring, and
the pressure of the second ring-shaped member is applied onto the steel sheets by the second compression coil spring.