| 摘要 |
PURPOSE:To fix securely dissimilar metals and to improve reliability, by fixing a flange to the circumferential edge part in the mounting hole of a steel case, and fixing a steel pipe to the flange. CONSTITUTION:A copper flange 8 having a through-hole 7 blanked by pressing is fixed to the circumferential edge part in the mounting hole 3 of a steel case 1 by in-furnace brazing using nickel solder. A steel pipe 5 which is fixed at one end in the connection hole 4 of a part 2 is projected to the outside part through the hole 3 and the hole 7 from the inside of the case 1. The pipe 5 in this stage is brazed to the joining part with the flange 8 by using phosphor copper. Then, the pipe 5 is hermetically fixed to the flange 8 and the flange 8 is hermetically fixed to the case 1, whereby the pipe 5 is fixed to the case 1. |
