SHEET MATERIAL FEEDING DEVICE
    7.
    发明公开

    公开(公告)号:EP4454779A1

    公开(公告)日:2024-10-30

    申请号:EP22911121.6

    申请日:2022-12-16

    发明人: SUZUKI, Kengo

    IPC分类号: B21D43/09

    摘要: Provided is a sheet material feeding device that achieves a reduction in power consumption, has improved durability, and transports a sheet material with high accuracy. This sheet material feeding device 101, which transports a sheet material clamped by a first roll 103 and a second roll 104, is equipped with a release mechanism 112 for releasing the clamped sheet material, the release mechanism 112 having an eccentric cam 201, an eccentric cam bearing 202 arranged along a side surface of the eccentric cam 201, a guide 203 arranged so as to be able to contact the eccentric cam bearing 202, and a block 204 arranged so as to be able to contact the guide 203 and connected to an upper roll support member 110. The release mechanism 112 causes the eccentric cam 201 to rotate and moves the guide 203 in a horizontal direction relative to the block 204 by means of the eccentric cam bearing 202, thereby causing the upper roll support member 110 connected to the block 204 to move in the vertical direction.

    PRESS-MOLDING METHOD AND PRESS-MOLDED ARTICLE MANUFACTURING METHOD

    公开(公告)号:EP4454777A1

    公开(公告)日:2024-10-30

    申请号:EP22926050.0

    申请日:2022-11-10

    发明人: TOBITA, Shunsuke

    IPC分类号: B21D22/20 B21D22/26 B21D24/00

    摘要: A press forming method and a press formed part manufacturing method according to the present invention correspond to a method of forming a press formed part 1, the press formed part 1 including: a top portion 3 having a convex peripheral edge 3a having a whole of or part of an outer peripheral edge curved outward in a convex shape; a side wall portion 5 continuous to the top portion 3 via a punch shoulder R portion 23; and a flange portion 7 continuous to the side wall portion 5 via a die shoulder R portion 25. The method includes: a first forming step of forming a metal sheet into a preformed part 17; a second forming step of forming the preformed part 17 formed in the first forming step into the press formed part 1 having a target shape. The first forming step performs forming such that a bending radius of the die shoulder R portion 25 formed corresponding to at least the convex peripheral edge 3a of the top portion 3 of the preformed part 17 is larger than a bending radius of the die shoulder R portion 25 of the press formed part 1 having the target shape.

    STEEL SHEET FOR HOT PRESSING AND HOT-STAMPED PART MANUFACTURED USING SAME

    公开(公告)号:EP4450674A1

    公开(公告)日:2024-10-23

    申请号:EP22907572.6

    申请日:2022-01-26

    摘要: An embodiment of the present invention discloses a hot-stamped part including: a base steel sheet; and a plated layer provided on the base steel sheet and including zinc (Zn), magnesium (Mg), silicon (Si), aluminum (Al), strontium (Sr), and the balance of iron (Fe) and other inevitable impurities, wherein the plated layer includes an alloying blocking layer, an intermediate alloy layer, and a corrosion resistance reinforcement layer which are sequentially stacked from the base steel sheet, and the corrosion resistance reinforcement layer includes an Sr-containing surface oxide layer.