| 摘要 |
PROBLEM TO BE SOLVED: To increase the joining strength of the joined part in a joined molding particularly obtained by joining different metallic materials to each other. SOLUTION: A rim 12 is inserted into an annular insertion part 20 in a die 16 composing a die device 10. An annular projection part 26 going toward the sides of a first punch 18 and a second punch 19 is projectingly formed at the upper edge part of the rim 12, and semisolidified slurry 14 is arranged at the position almost coincident with the center of the annular projection part 26. The rim 12 and the semisolidified slurry 14 are made of different metallic materials. After die clamping, the semisolidified slurry 14 is pressed by the lowered second punch 19, and starts to flow. The semisolidified slurry 14 made to flow to the annular projection part 26 is squeezed by a squeezing part 28 formed by the annular projection part 26, thus its flow resistance increases. In accordance with this, the pressing force of the semisolidified slurry 14 to the start end part 30 of the annular projection part 26 is increased, and high frictional force is generated between the start end part 30 and the semisolidified slurry 14. COPYRIGHT: (C)2010,JPO&INPIT |
