| 摘要 |
PURPOSE:To produce aluminum pipes continuously by one time of a preparatory plan in the starting stage of work by swaging the connecting end parts of base materials for aluminum pipes substantially down to the prescribed finish size of the aluminum pipes and subjecting said parts to flash butt welding. CONSTITUTION:The respectively opposed connecting end parts 2 of the coils of base materials 1 for aluminum pipes are swaged to a taper shape by rolling whereby the joining end faces 3 of the parts 2 are worked substantially to the same size (d) as the finish size of aluminum pipes. The parts 2, 2 are mated at the faces 3 and welding electric power is applied between the parts 2 and 2 via electrodes 5, 5 from an electric power source 4 for welding, whereby said parts are subjected to flash butt welding. After the burrs 6 formed by the welding are ground away to smooth the parts 2, 2, the parts are finished with dies, whereby an aluminum pipe of a prescribed size is obtained. |
