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    • 4. 发明公开
    • 금속판의 액압벌징 성형방법, 금형 및 성형품
    • 金属板加压方法,成型和成型部分
    • KR1020020086238A
    • 2002-11-18
    • KR1020020024796
    • 2002-05-06
    • 스미토모 긴조쿠 고교 가부시키가이샤
    • 코지마마사야스우치다미츠토시
    • B21D26/021
    • B21D26/021B21D26/023B21D26/059Y10T29/49375Y10T29/49805Y10T29/49893Y10T29/49941
    • PURPOSE: 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. CONSTITUTION: A sheet hydroforming method is provided, 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,11b). A through hole lid 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 through hole(11d), then the fluid is introduced in a pressurized state between mating surfaces of the metallic sheets from the through hole through the pierced hole, thereby causing the metallic sheets to bulge.
    • 目的:根据这种方法,加压流体可以容易地在毛坯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。 构成:提供一种片材液压成形方法,其中两个堆叠的金属片被夹在一对上模和下模(10,11)之间,并且在金属片的配合表面之间引入和加压流体,使金属片膨胀 进入由模腔(10b,11b)限定的空间。 在一个模具中形成用于引入流体的通孔盖,以便导致模具的保持表面,同时用于引入流体的穿孔在一个金属片的一部分中形成在一个金属片中 其中一个模具的一个保持表面(10a,10b)与穿孔(11d)定位,然后在金属片的配合表面之间以加压状态引入流体 从通孔穿过穿孔,从而使金属片膨胀。