Two-stage method of cutting ultra-high strength material sheet

    公开(公告)号:US10328504B2

    公开(公告)日:2019-06-25

    申请号:US15367298

    申请日:2016-12-02

    IPC分类号: B23D35/00 B21D28/26 B23D31/00

    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.

    Metal forming method including post-forming stretching to control springback

    公开(公告)号:US11285523B2

    公开(公告)日:2022-03-29

    申请号:US16455084

    申请日:2019-06-27

    IPC分类号: B21D22/02 B21D24/04

    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.

    Draw-in control for sheet drawing

    公开(公告)号:US10786842B2

    公开(公告)日:2020-09-29

    申请号:US16128587

    申请日:2018-09-12

    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.

    Machine press
    6.
    发明授权

    公开(公告)号:US09914164B1

    公开(公告)日:2018-03-13

    申请号:US15265951

    申请日:2016-09-15

    IPC分类号: B21D22/06 B21D24/08

    CPC分类号: B21D22/22 B21D24/04

    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.

    STAMPING APPARATUS HAVING A PART-TIME DRAW BEAD

    公开(公告)号:US20220395884A1

    公开(公告)日:2022-12-15

    申请号:US17347801

    申请日:2021-06-15

    IPC分类号: B21D22/22 B21D22/06 B21D37/10

    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.

    Film cartridge including light blocking fabric
    8.
    发明授权
    Film cartridge including light blocking fabric 失效
    胶片盒包括防光面料

    公开(公告)号:US06871811B2

    公开(公告)日:2005-03-29

    申请号:US10206442

    申请日:2002-07-26

    摘要: A film container incorporating a light-blocking pile fabric composite disposed in bounding relation to a slit opening in the container. The pile fabric composite includes a heat curable resilient polymeric stiffening primer disposed across the underside of a pile fabric and a layer of substantially solvent free, heat activatable adhesive disposed below the primer and bonded to a bare or coated surface of black pigmented polyvinyl acetate of the container.

    摘要翻译: 一种包含与容器中的狭缝开口有界的遮光绒织物复合物的胶片容器。 绒头织物复合材料包括设置在绒头织物的下侧的可热固化的弹性聚合物硬化底漆和布置在底漆下方的基本上无溶剂的可热激活的粘合剂层,并且粘合到黑色着色的聚乙酸乙烯酯的裸露或涂覆的表面上 容器。