| 摘要 |
PROBLEM TO BE SOLVED: To join a plate material to a round bar material of aluminum alloy. SOLUTION: A projecting part 16 is formed on the surface of a plate material 15 of aluminum alloy, and a round bar material M of the same aluminum alloy is supported in contact at the summit of the projecting part 16. That is, the plate material 15 and the round bar material M are in local contact with each other via the projecting part 16. In this state, the plate material 15 and the round bar material M are hold between opposite electrodes 17a and 17b, and electric power is supplied while both electrodes 17a and 17b are pressurizing. Thus the welding current flows concentrated at the summit of the projecting part 16 and the electric current density at the projecting part 16 is remarkably increased. As a result, the projecting part 16 is easily molten to collapse, and the plate material 15 and the round bar material M are joined by a solidification of the molten part. |
