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公开(公告)号：US10668516B2
公开(公告)日：2020-06-02
申请号：US15254493
申请日：2016-09-01
申请人： Dajun Zhou , Changqing Du
发明人： Dajun Zhou , Changqing Du
摘要： A sheet metal material is stamped into a formed shape having a side wall between a central portion and a flange portion. The central portion is held between an upper pad and a die, and the flange portion is held between an upper binder and a lower binder. A post-stamping compression force is applied along a length of the side wall of the formed shape. For example, application of the post-stamping compression force includes moving the lower binder relatively toward the upper pad, such as by delaying a return of the upper pad during a portion of a return of the lower binder. During application of the post-stamping compression force, an outward force is applied against an inner surface of the side wall to insure any bowing of the side wall is in an outward direction.
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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：US20180056361A1
公开(公告)日：2018-03-01
申请号：US15254493
申请日：2016-09-01
申请人： Dajun Zhou , Changqing Du
发明人： Dajun Zhou , Changqing Du
摘要： A sheet metal material is stamped into a formed shape having a side wall between a central portion and a flange portion. The central portion is held between an upper pad and a die, and the flange portion is held between an upper binder and a lower binder. A post-stamping compression force is applied along a length of the side wall of the formed shape. For example, application of the post-stamping compression force includes moving the lower binder relatively toward the upper pad, such as by delaying a return of the upper pad during a portion of a return of the lower binder. During application of the post-stamping compression force, an outward force is applied against an inner surface of the side wall to insure any bowing of the side wall is in an outward direction.
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公开(公告)号：US09120137B2
公开(公告)日：2015-09-01
申请号：US13486067
申请日：2012-06-01
申请人： Dajun Zhou , Changqing Du , John F. Siekirk, III
发明人： Dajun Zhou , Changqing Du , John F. Siekirk, III
摘要： A stamping apparatus includes a lower die defining a cavity, with a land portion surrounding the cavity. A movable upper die includes a drawing punch that corresponds to the cavity. A binder movable towards the land portion of the lower die engages an edge portion of the blank, wherein the land portion of the lower die and the movable binder each include a plurality of beads that crimp the edge portion of the blank when the movable binder engages the edge portion of the blank. The plurality of beads are oriented orthogonal to a terminal edge of the edge portion. By orienting the plurality of beads in this manner, the crimped edge portion of the blank is allowed to move inboard towards the cavity when the blank is engaged by the drawing punch before being constrained by a throat portion defined by the binder and the lower die.
摘要翻译： 冲压装置包括限定空腔的下模具，其具有包围空腔的凸台部分。 可动上模包括对应于空腔的拉拔冲头。 可朝向下模具的陆部移动的活页夹与坯件的边缘部分相接合，其中下模具和可移动夹具的接合部分各自包括多个凸珠，当可动夹具啮合时，该凸缘可压缩坯件的边缘部分 坯料的边缘部分。 多个珠粒定向成与边缘部分的末端边缘正交。 通过以这种方式定向多个珠，当坯料在被粘合剂和下模限定的喉部限制之前，坯料与拉伸冲头接合时允许坯料的卷曲边缘部分向内移动。
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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：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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8.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：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：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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