| 摘要 |
PROBLEM TO BE SOLVED: To enable a strong joining of a round bar of an aluminum alloy which is of a 5000 series (Al-Mg-based) or a 6000 series (Al-Mg-Si-based) specified in the JIS Code. SOLUTION: Aluminum alloy round bars 14 and 15 are butted each other in a straight line. In this state, electrodes 17 and 18 are connected to the round bars 14 and 15, respectively. Power is supplied to both round bars 14 and 15 while the second round bar 15 is pressurized with a pressurizing device 16. Then a welding current flows through the joining face of the round bars 14 and 15 and the joining part is easily molten and collapsed, and the round bars 14 and 15 are joined when the molten part is solidified. The aluminum alloy round bars 14 and 15 are, therefore, strongly joined by the butt welding. |
