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公开(公告)号：US20220161307A1
公开(公告)日：2022-05-26
申请号：US17102882
申请日：2020-11-24
申请人： Dajun Zhou , Kaiping Li , Robert D. Miller , Richard J. Siemen , Yongiun Zhou
发明人： Dajun Zhou , Kaiping Li , Robert D. Miller , Richard J. Siemen , Yongiun Zhou
IPC分类号： B21D22/02
摘要： A stamping machine configured to shape a sheet material including an upper binder including first teeth, a lower binder including second teeth, and a punch. A first cylinder is positioned between a lower binder and a support surface. A second cylinder is positioned between the upper binder and the lower binder. A cushion pin is positioned at the support surface that is configured to contact and control movement of the lower binder relative to the punch. A force exerted by the second cylinder is greater than that exerted by the first cylinder, and the force exerted by the cushion pin is greater than that exerted by the second cylinder. The first and second cylinders and the cushion pin are used to control when the first and second teeth are permitted to engage the sheet material, which assists in preventing or minimizing spring back of the sheet material through post-stretching.
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公开(公告)号：US20170157661A1
公开(公告)日：2017-06-08
申请号：US14959391
申请日：2015-12-04
申请人： Dajun Zhou , Kaiping Li , Changqing Du , Richard J. Siemen
发明人： Dajun Zhou , Kaiping Li , Changqing Du , Richard J. Siemen
IPC分类号： B21D22/02
摘要： A stamping apparatus for stamping a blank, including a lower die defining a cavity, the lower die including a land portion surrounding the cavity; a movable upper die including a drawing punch that corresponds to the cavity; and a binder movable towards the land portion of the lower die for engaging an edge portion of the blank, wherein the land portion of the lower die includes a plurality of depressions and the movable binder includes a plurality of beads that correspond to the depressions that mate to crimp the edge portion of the blank when the movable binder engages the edge portion of the blank, each of the plurality of depressions between separated by a flat region of the land portion, and each of the plurality of depressions including a central portion that extends along the cavity and a pair of end portions that extend away from the cavity.
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公开(公告)号：US10933458B2
公开(公告)日：2021-03-02
申请号：US16225748
申请日：2018-12-19
申请人： Dajun Zhou , Changqing Du , Robert D Miller , Richard J Siemen
发明人： Dajun Zhou , Changqing Du , Robert D Miller , Richard J Siemen
摘要： A stamping press binder assembly for forming a finished stamped product from a blank includes an upper die for at least partially forming the finished stamped product, a stationary punch, an inner lower binder, and an outer lower binder. The inner and outer lower binders are both supported by a single cushion.
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公开(公告)号：US20220395884A1
公开(公告)日：2022-12-15
申请号：US17347801
申请日：2021-06-15
申请人： Dajun Zhou , Chunlei Wang , Robert D Miller , Kaiping Li , Yongjun Zhou , Richard J Siemen
发明人： Dajun Zhou , Chunlei Wang , Robert D Miller , Kaiping Li , Yongjun Zhou , Richard J Siemen
摘要： A stamping apparatus that includes an upper die, a blank-holding binder, and fixed lower die. The fixed lower die features a drawing punch and the upper die features a corresponding cavity. The fixed lower die includes a stake bead and a corresponding depression is present on the upper die. The blank-holding binder includes a draw bead and a corresponding depression is present on the upper die. In the stamping process, the draw bead engages a blank in a first stage, causing the blank to begin to stretch into the shape of the drawing punch with a greater tightened partially finished panel shape. In a second stage, the draw bead disengages the blank as the blank is drawn towards the drawing punch. In a final stage, the stake bead engages the blank to tighten the blank around the drawing punch into a final shape.
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公开(公告)号：US09827606B2
公开(公告)日：2017-11-28
申请号：US14959391
申请日：2015-12-04
申请人： Dajun Zhou , Kaiping Li , Changqing Du , Richard J Siemen
发明人： Dajun Zhou , Kaiping Li , Changqing Du , Richard J Siemen
摘要： A stamping apparatus for stamping a blank, including a lower die defining a cavity, the lower die including a land portion surrounding the cavity; a movable upper die including a drawing punch that corresponds to the cavity; and a binder movable towards the land portion of the lower die for engaging an edge portion of the blank, wherein the land portion of the lower die includes a plurality of depressions and the movable binder includes a plurality of beads that correspond to the depressions that mate to crimp the edge portion of the blank when the movable binder engages the edge portion of the blank, each of the plurality of depressions between separated by a flat region of the land portion, and each of the plurality of depressions including a central portion that extends along the cavity and a pair of end portions that extend away from the cavity.
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