| 摘要 |
PURPOSE:To join securely a high-conductivity material and low-conductivity material by resistance welding while preventing the temp. elevation and welding of the contact surface between electrodes and an insert material owing to the smaller tendency of the insert material to heat generation by interposing the high-conductivity material between the low conductivity material and the electrode in the resistance welding stage of the high-conductivity material and low-conductivity material. CONSTITUTION:The high-conductivity material 1 and the low-conductivity material 2 are superposed in the electric resistance welding stage of the two materials. The high-conductivity material 5 is then pressed to the bottom surface of the material 2 to form a 3-layered construction and thereafter the materials are sandwiched by the electrodes 3, 4 from above and below and welding current is passed between the electrode 3 and the electrode 4 while the materials are pressed. Then mainly the material 2 generates heat and the contact surface 6 between the material 2 and the material 1 as well as the contact surface 7 between the material 6 as well as the material 5 are respectively fused to each other. Since the materials 1 and 5 generate heat to the smaller extent, the welding of said materials to the contact surface 8 with the electrode 3 or 4 and the contact surface 9 does not arise. |
