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公开(公告)号：US11285523B2
公开(公告)日：2022-03-29
申请号：US16455084
申请日：2019-06-27
申请人： Dajun Zhou , Changqing Du , Kaiping Li , Robert D Miller
发明人： Dajun Zhou , Changqing Du , Kaiping Li , Robert D Miller
摘要： A metal blank is clamped between upper and lower binders with the metal blank engaging against a protrusion extending from a binder surface of any of the upper binder, the lower binder, and both upper and lower binders, to create a binder gap between the metal blank and the binder surface adjacent the protrusion. The binder gap prevents cooperating springback control binder elements of the binder surface from actively engaging the metal blank. The metal blank is drawn into a cavity, with the protrusion riding on the metal blank until the protrusion falls off an edge of the metal blank, which closes the binder gap between the metal blank and the binder surface causing the cooperating springback control binder elements to actively engage the blank for the post-forming stretching operation.
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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：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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公开(公告)号：US20200078846A1
公开(公告)日：2020-03-12
申请号：US16128587
申请日：2018-09-12
申请人： Dajun Zhou , Changqing Du , Robert D. Miller
发明人： Dajun Zhou , Changqing Du , Robert D. Miller
摘要： A method of forming a finished stamped product includes positioning a blank on a blank holder between an upper die and a lower die, inserting a movable wedge block between the blank holder and the upper die to establish a first binder gap, and while the movable wedge block is inserted, performing a first strike of the blank by lowering the upper die a first distance to contact and partially form the blank, the movable wedge block limiting downward movement of the upper die relative to the lower die. After the first strike, withdrawing the movable wedge block to establish a second binder gap between the blank holder and the upper die, and while the movable wedge block is withdrawn, performing a second strike of the blank by lowering the upper die a second distance to finally form the blank into the finished product.
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5.发明申请公开(公告)号：US20180021832A1
公开(公告)日：2018-01-25
申请号：US15214510
申请日：2016-07-20
申请人： Dajun Zhou , Changqing Du , Robert D Miller , Jugraj Singh
发明人： Dajun Zhou , Changqing Du , Robert D Miller , Jugraj Singh
IPC分类号： B21D22/02
CPC分类号： B21D22/02 , B21D5/08 , B21D31/005
摘要： An outer bend radius is cold formed in an outer position within a final arc of the angled corner with an outer bend radius male die member. A central bend radius is cold formed in a central position spaced from the outer position and within the final arc of the angled corner with a central bend radius male die member. An inner bend radius is cold formed in an inner position that is spaced from the outer and central positions and the inner position is within a final arc of the angled corner with an inner bend radius male die member. The angled corner is transferred between each of the bend radii male die members using a continuous advanced high strength metal sheet in which the angled corner is formed.
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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：US20180154420A1
公开(公告)日：2018-06-07
申请号：US15367298
申请日：2016-12-02
申请人： Dajun Zhou , Changqing Du , Robert D. Miller
发明人： Dajun Zhou , Changqing Du , Robert D. Miller
CPC分类号： B23D35/001 , B21D28/26 , B23D31/00 , Y10T83/942 , Y10T83/9432
摘要： In a first stage or operation, at least one shear initiation breakthrough opening is formed through the ultra-high strength material sheet at an interior location. A leading terminal end of each of at least two inclined shearing edges of an interior opening shearing tool is positioned in the at least one shear initiation breakthrough opening. The interior opening shearing tool is different from the breakthrough opening forming tool. In a second stage or operation, shearing of the material is initiated from the at least one shear initiation breakthrough opening by advancing the at least two inclined shearing edges of the interior opening shearing tool against the ultra-high strength material sheet and relative to a corresponding shearing tool.
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公开(公告)号：US10328504B2
公开(公告)日：2019-06-25
申请号：US15367298
申请日：2016-12-02
申请人： Dajun Zhou , Changqing Du , Robert D Miller
发明人： Dajun Zhou , Changqing Du , Robert D Miller
摘要： In a first stage or operation, at least one shear initiation breakthrough opening is formed through the ultra-high strength material sheet at an interior location. A leading terminal end of each of at least two inclined shearing edges of an interior opening shearing tool is positioned in the at least one shear initiation breakthrough opening. The interior opening shearing tool is different from the breakthrough opening forming tool. In a second stage or operation, shearing of the material is initiated from the at least one shear initiation breakthrough opening by advancing the at least two inclined shearing edges of the interior opening shearing tool against the ultra-high strength material sheet and relative to a corresponding shearing tool.
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公开(公告)号：US20180071807A1
公开(公告)日：2018-03-15
申请号：US15265951
申请日：2016-09-15
摘要： A binder assembly for stamping sheet material includes an upper die, a stationary punch, an outer ring, and an inner ring. The stationary punch is aligned to be received inside a cavity of the upper die. The outer ring and the inner ring extend around the punch and are movable relative thereto. The inner ring includes teeth on a top surface and is positioned an initial distance from an end of the punch. The upper die is driven along the punch the initial distance such that the punch is received inside the cavity of the upper die a partial distance and a remaining distance such that the punch is received inside the cavity of the upper die a deeper distance.
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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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