| 摘要 |
PROBLEM TO BE SOLVED: To provide a resistance welding method capable of superior resistance welding for a thin metallic pipelike object having a thickness of 1 mm or less and also capable of simplifying the welding equipment. SOLUTION: In a resistance welding method in which welding is performed by flowing an electric current between one thin metallic pipelike object 1, with a pressurizing force applied in the axial direction of the object 1, and the other similar object 2 having a hole corresponding in size to the inner diameter of the object 1, the weld zone of the object 1 is provided with an expanded diameter part 1A larger than other parts in the outer diameter, so that the welding is carried out in a state where a pressurizing force is applied to the expanded diameter part 1A in the axial, direction by a welding electrode 3. |
