| 摘要 |
PROBLEM TO BE SOLVED: To provide a joining method and joining apparatus of a joined structure having high productivity and combining reduction in voids with securement of rust prevention performance. SOLUTION: In brazing steps, reduction of pressure inside a furnace is started just before fusion of a flux (first temperature), and an interval between the joining faces of a workpiece is kept at a negative pressure. Thereafter, by continuously heating under the low pressure, the flux is fused, with the voids in the flux solution left in the negative pressure. Then, in the unfused state of the filler metal (second temperature), it is returned to the atmospheric pressure. As a result, the voids are compressed and removed. Subsequently, by continuously heating under the atmospheric pressure, the filler metal is fused, so that the oxidation film of the workpiece (aluminum plate and the like) is removed from the entire joining faces by the flux and that the joining faces are brazed. COPYRIGHT: (C)2010,JPO&INPIT |
