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1. 发明授权

US12070787B2 Press forming method and press apparatus 有权
公开(公告)号：US12070787B2
公开(公告)日：2024-08-27
申请号：US17425614
申请日：2020-01-24
申请人： NIPPON STEEL CORPORATION
发明人： Minoru Sugawara , Yasuharu Tanaka , Takashi Miyagi , Misao Ogawa , Junki Natori
IPC分类号： B21D22/22 , B21D19/08 , B21D24/04 , B21D53/88
CPC分类号： B21D22/22 , B21D19/08 , B21D24/04 , B21D53/88
摘要： A press forming method includes a first step of pinching one part of a metal sheet by means of a die and a pad, and a second step of moving a punch in a direction in which the punch approaches the die relatively to perform press forming on the metal sheet. The die has a first support surface which has an edge including a curved portion. The pad has a second support surface facing the first support surface of the die. The first support surface includes a first flat portion, and a first deformation portion which protrudes or is recessed with respect to the first flat portion. The second support surface includes a second flat portion which faces the first flat portion, and a second deformation portion which is recessed or protrudes with respect to the second flat portion so as to correspond to the first deformation portion. The first deformation portion is provided on a normal line of the curved portion as viewed from a pressing direction. When a space between the first deformation portion and the second deformation portion is assumed to be a deformation space, in the second step, press forming is performed so that portions of the metal sheet which are on both sides of the deformation space flow into the deformation space, and the metal sheet deforms along the first deformation portion and the second deformation portion in the deformation space.

2. 发明授权

US11813659B2 Press forming method and press forming apparatus for automotive outer panel 有权
公开(公告)号：US11813659B2
公开(公告)日：2023-11-14
申请号：US17642778
申请日：2020-04-08
申请人： JFE STEEL CORPORATION
发明人： Yasuhiro Kishigami
IPC分类号： B21D22/26 , B21D24/04 , B60J5/04 , B21D53/88 , B21D22/22
CPC分类号： B21D53/88 , B21D22/22 , B21D22/26 , B21D24/04 , B60J5/0415
摘要： A press forming method for an automotive outer panel according to the present invention is a method for press forming a metal sheet 51 into an automotive outer panel 61 having a character line 63 and panel surface portions 65a and 65b by using a punch 3, a die 5, and a blank holder 7. The press forming method includes: a step of providing an elastic body 9 protruding toward the punch 3 side on a die-side forming surface portion 5b forming the panel surface portion 65a, and bringing the elastic body 9 into contact with the metal sheet 51 prior to the die 5; and a step of press forming while crushing the elastic body 9 and pressing the metal sheet 51, and the elastic body 9 is caused to protrude from the die-side forming surface portion 5b so that a frictional force of the crushed elastic body 9 and the metal sheet 51 is equal to or greater than an absolute value of a difference between tensions acting on both sides of a portion 53 corresponding to the character line 63.

3. 发明公开

US20230150004A1 HOT PRESS APPARATUS AND METHOD OF MANUFACTURING HOT-PRESS-FORMED PRODUCT 审中-公开
公开(公告)号：US20230150004A1
公开(公告)日：2023-05-18
申请号：US17916353
申请日：2021-03-30
申请人： NIPPON STEEL CORPORATION
发明人： Kenta UENISHI , Toshiya SUZUKI
IPC分类号： B21D24/04 , B21D24/14 , B21D22/20
CPC分类号： B21D24/04 , B21D24/14 , B21D22/20
摘要： A hot press apparatus includes a first die part 2 and a second die part 3, and a control unit 9. At least one of the first and second die parts 2 and 3 includes a recess 3a in the surface facing the other die part in the direction of pressing. A movable die part 4 is provided in the recess 3a. The control unit 9 controls the movable die part 4 such that the bottom-dead-center holding period, for which the first and second die parts 2 and 3 are at the bottom-dead center, includes an abutment period for which the movable die part 4 abuts the metal sheet B and a non-abutment period for which the movable die part does not abut the metal sheet B.

4. 发明申请

US20230060061A1 FORMING APPARATUS AND FORMING METHOD USING FORMING APPARATUS 有权
公开(公告)号：US20230060061A1
公开(公告)日：2023-02-23
申请号：US17887469
申请日：2022-08-14
申请人： HONDA MOTOR CO., LTD.
发明人： Yoshimitsu ISHIHARA , Kenichi CHIDA , Hiroki SATO , Mitsufumi OKADA , Naoharu WAKIDA , Yuta ROKUGAWA
IPC分类号： B21D24/04 , B21D53/88
摘要： An upper die of a forming apparatus includes a first curved portion and a second curved portion between a second concave section and an upper holding surface. The first curved portion is curved in a direction away from the upper die. The second curved portion is curved toward the upper die. A blank holding surface of a blank holder holds a blank between the blank holding surface and the upper holding surface of the upper die. The blank holding surface faces the second curved portion. The blank holding surface includes a blank curved surface recessed along the second curved portion.

5. 发明授权

US11517954B2 Pressed component manufacturing method and press apparatus 有权
公开(公告)号：US11517954B2
公开(公告)日：2022-12-06
申请号：US16552845
申请日：2019-08-27
申请人： NIPPON STEEL CORPORATION
发明人： Masahiro Kubo , Hiroshi Yoshida , Takashi Miyagi
IPC分类号： B21D22/26 , B21D53/88 , B62D25/04 , B21D22/21 , B21D5/00 , B21D24/04 , B21D22/06 , B62D25/20
摘要： A method for manufacturing a pressed component including an elongated top plate, a wall having one end connected to a short direction end portion of the top plate, that curves with a convex shape bowing toward an opposite side to the top plate as viewed from an upper side of the top plate, and that includes a sharp curve portion, and a flange that is connected to another end of the wall, and that extends in a plate thickness direction of the wall toward the opposite side to the top plate side. The manufacturing method includes pressing to form an intermediate formed component including a preliminary flange and pressing to deform the preliminary flange to form the preliminary flange into the flange.

6. 发明授权

US11285523B2 Metal forming method including post-forming stretching to control springback 有权
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
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.

7. 发明申请

US20210060634A1 MANUFACTURING APPARATUS AND MANUFACTURING METHOD FOR HAT-SHAPED CROSS-SECTION COMPONENT 有权
公开(公告)号：US20210060634A1
公开(公告)日：2021-03-04
申请号：US16877602
申请日：2020-05-19
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： Isao NOJIRI , Naoya SUGIMOTO
IPC分类号： B21D22/22 , B21D24/04 , B21D5/01
摘要： A manufacturing apparatus for a hat-shaped cross-section component includes a die having first molding surfaces, a pad having a second molding surface, a punch having a third molding surface, a holder having fourth molding surfaces, and a first restraint portion. An upright wall is molded between a top and each of flanges by moving the pad and the punch relative to the die and the holder, or moving the die and the holder relative to the pad and the punch. The first restraint portion is configured to, during a period from when a top forming part is sandwiched by the second molding surface and the third molding surface to when the upright walls are molded, suppress displacement of the top forming part in a longitudinal direction of the top forming part relative to the second molding surface and the third molding surface.

8. 发明授权

US10898938B2 Method for manufacturing panel-like formed article 有权
公开(公告)号：US10898938B2
公开(公告)日：2021-01-26
申请号：US16084201
申请日：2017-03-16
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Kenichiro Otsuka , Koichi Hamada , Yoshiaki Nakazawa
IPC分类号： B21D22/26 , B21D24/04 , B21D24/00 , B21D22/20 , B21D22/02 , B21D22/22 , B21D53/88 , B60J5/04
摘要： This method for manufacturing a panel-like formed article has preparing a blank material made of a metal sheet having a tensile strength of 390 MPa or more and 980 MPa or less; and press-forming the blank material in a cold manner using a pressing apparatus to form the blank material into the panel-like formed article, in the press-forming, a blank holder, a first punch, and a second punch are relatively moved with respect to a die, thereby pressing the first punch and the second punch to the blank material, and pressing of the second punch to the blank material is completed before pressing of the first punch to the blank material.

9. 发明授权

US10807139B2 Cupper draw pad 有权
公开(公告)号：US10807139B2
公开(公告)日：2020-10-20
申请号：US15241838
申请日：2016-08-19
申请人： Anheuser-Busch, LLC
发明人： Mark Schremmer , Scott Schaefer , Mark Wagner
IPC分类号： B21D22/20 , B21D22/28 , B21D24/04 , B21D22/22 , B21D51/26
摘要： A draw pad reduces instances and the extent of earing when a blank of metal is clamped and punched during a drawing process that results in the formation a cup-shaped body from the blank. A draw pad for a cupping press includes an inner surface that defines a draw aperture that is configured to receive a punch. The draw pad also includes a clamping surface that has a first force concentrating segment disposed circumferentially spaced apart from a second force concentrating segment, where each force concentrating segment includes a first arcuate groove and a second arcuate groove that is disposed concentric and radially spaced apart from the first arcuate groove.

10. 发明授权

US10717123B2 Method and press-forming apparatus for manufacturing structural member for automotive body 有权
公开(公告)号：US10717123B2
公开(公告)日：2020-07-21
申请号：US14913851
申请日：2014-09-10
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Yasuhiro Ito , Ryuichi Nishimura , Kenichiro Otsuka , Yoshiaki Nakazawa
IPC分类号： B21D22/26 , B21D5/16 , B21D53/88 , B21D24/04
摘要： A method for manufacturing the structural member (1), the method including: a first step in which the pad (15, 15A, 15B, 15C, 21) presses the forming material (16) against the punch (13) to raise a portion corresponding to a flange to be formed in ends of at least the gutter bottom (2) and the ridge (3a, 3b) in a direction opposite to the pressing direction, the pad (15, 15A, 15B, 15C, 21) bends an end of a portion to be formed into the ridge (3a, 3b) in the pressing direction and restrains at least a part of the end, and the punch (13) and the die (14) carry out press forming to form an intermediate product while a region other than an end in a portion to be formed into the gutter bottom (2) remains unrestrained.

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