公开(公告)号：US06584821B1

公开(公告)日：2003-07-01

申请号：US10123662

申请日：2002-04-16

申请人： Mircea M Ghiran ,  Spyros Pete Mellas ,  Paul C Oberski

发明人： Mircea M Ghiran ,  Spyros Pete Mellas ,  Paul C Oberski

IPC分类号： B21D2602

CPC分类号： B21D37/12 ,  B21D15/03 ,  B21D26/039 ,  B21D26/047 ,  Y10T29/49805

摘要： A pair of self-aligning non-pinching hydroforming dies have fingers and slots which are operable during closure of the dies on a tubular part to effect precise alignment of the dies as they are pressed together to form a hydroforming cavity about the part so that the part is not pinched between mating surfaces of the dies during their closure on the part. The fingers are further capable of mechanically straightening and/or bending the part, if need be, to prevent pinching of the part during die closure. The fingers are also capable of mechanically forming a round tubular part to a non-round cross-section region of the die cavity as the dies close to help form the part as well as prevent pinching of this section. With all such mechanical forming operations by the action of the fingers on the part performed prior to the hydroforming of the part in the die cavity.

摘要翻译： 一对自对准非夹持液压成形模具具有指状物和狭槽，其可在模具封闭管状部件期间操作，以在模具被压在一起时精确对准模具，以在该部件周围形成液压成形腔体， 在模具闭合部件之间，模具的配合表面之间不会夹紧零件。 如果需要，手指还能够机械矫正和/或弯曲部件，以防止在模具闭合期间部件的夹紧。 手指还能够在模具的非圆形横截面区域机械地形成圆形管状部件，因为模具靠近以帮助形成该部件以及防止该部分的挤压。 通过手指在模具腔中的部件的液压成形之前执行的部件的作用进行所有这样的机械成形操作。

公开(公告)号：US06305201B1

公开(公告)日：2001-10-23

申请号：US09828689

申请日：2001-04-09

申请人： Mircea Ghiran ,  Paul C Oberski

发明人： Mircea Ghiran ,  Paul C Oberski

IPC分类号： B21D2602

CPC分类号： B21D28/34 ,  B21D26/035 ,  B21D28/28 ,  Y10T83/0591 ,  Y10T83/0596

摘要： Method and apparatus for forming unobstructed holes in a hydroformed metal part employs a punch having a peripheral side conforming to the desired hole shape and an end face having a central cutting edge with a high point that contacts on closure of a hydroforming die with an unsupported wall section of the part initiating a stress riser therein. During forming of the part, the hydraulic pressure forces the above wall section outward against this high point increasing the magnitude of the stress riser. The punch is advanced while maintaining the hydraulic pressure causing the above high point to fracture this wall section at the stress riser and the above cutting edge to then split and cut this wall section to form oppositely facing cut edges in this section. Simultaneously, oppositely angled cutting edges at opposite ends of the central cutting edge and at the punch end face periphery then cut this wall section in directions away from the oppositely facing cut edges to form oppositely extending slugs. As the punch continues to be advanced, contoured portions of the punch end face with the aid of the hydraulic pressure contact the slugs to provide a seal to maintain the hydraulic pressure while bending the slugs as they are being cut into the interior of the part. The peripheral side of the punch with further punch movement engages the slugs with an interference fit to maintain the hydraulic pressure and forces the slugs into positions forming an unobstructed hole in the part while remaining integral therewith.

摘要翻译： 用于在液压成形金属部件中形成无障碍孔的方法和装置采用具有符合期望孔形状的周向侧的冲头和具有高点的中心切削刃的端面，该中心切削刃在液压成形模具与无支撑壁关闭时接触 部分启动其中的应力提升管的部分。 在成形部件期间，液压压力使上述壁部分向外抵抗该高点增加应力提升器的大小。 冲头先进，同时保持液压使上述高点在应力提升器和上述切割刃处破裂该壁部分，然后将该壁部分分割和切割，以在该部分中形成相对的切割边缘。 同时，在中心切割边缘的相对端和冲头端面周边处的相对倾斜的切割边缘在远离相对的切割边缘的方向上切割该壁部分以形成相对延伸的部分。 随着冲头继续前进，冲头端面的轮廓部分借助于液压接触塞子，以提供密封以保持液压压力，同时当部件被切割成部件的内部时将其塞住。 具有进一步冲头运动的冲头的周边侧面以过盈配合接合该塞子，以保持液压并且迫使该塞子形成该部件中的无障碍孔，同时保持与其成一体。