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    • 10. 发明授权
    • Metallic sheet hydroforming method, forming die, and formed part
    • 金属板液压成型法,成型模具及成型件
    • US06722009B2
    • 2004-04-20
    • US10141074
    • 2002-05-09
    • Masayasu KojimaMitsutoshi Uchida
    • Masayasu KojimaMitsutoshi Uchida
    • B23P1700
    • B21D26/021B21D26/023B21D26/059Y10T29/49375Y10T29/49805Y10T29/49893Y10T29/49941
    • A sheet hydroforming method is disclosed wherein two stacked metallic sheets are clamped between a pair of upper and lower dies 10, 11 and a fluid is introduced and pressurized between mating surfaces of the metallic sheets, causing the metallic sheets to bulge into a space defined by die cavities 10b and 11b. A thru-hole 11d for introducing the fluid is formed in one of the dies so as to lead to a holding surface of the die, while a pierced hole for introducing the fluid is formed in one of the metallic sheets in a portion of the one metallic sheet which portion is in contact with a holding surface 10a (10b) of one of the dies, the pierced hole being positioned with the thru-hole 11d, then the fluid is introduced in a pressurized state between mating surfaces of the metallic sheets from the thru-hole through the pierced hole, thereby causing the metallic sheets to bulge. According to this method, a pressurized fluid can be introduced between the mating surfaces of blanks easily without leakage of the fluid. Not only the efficiency of the sheet hydroforming method but also the dent resistance of a formed part can be improved.
    • 公开了一种片材液压成形方法,其中两个堆叠的金属板被夹在一对上模具和下模具10,11之间,并且在金属板材的配合表面之间引入和加压流体,导致金属板件膨胀到由 模腔10b和11b。 在一个模具中形成用于引入流体的通孔11d,以导致模具的保持表面,同时在一个金属片中的一个中形成用于引入流体的穿孔, 金属片与其中一个模具的保持表面10a(10b)接触,穿孔与通孔11d定位,然后将流体以金属片的配合表面之间的加压状态引入 通孔穿过穿孔,从而使金属片膨胀。 根据该方法,加压流体可以容易地在坯料的配合表面之间引入,而不会泄漏流体。 不仅可以提高片材液压成形方法的效率,而且可以提高成形部件的耐凹陷性。