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1. 发明授权

US11609166B2 Deformation limit evaluation method for sheared surface of metal sheet, crack prediction method, and press die designing method 有权
公开(公告)号：US11609166B2
公开(公告)日：2023-03-21
申请号：US16640224
申请日：2018-07-13
申请人： JFE Steel Corporation
发明人： Yusuke Fujii , Kento Fujii , Yuji Yamasaki
IPC分类号： G01N3/28 , G06F30/23 , G06F30/17 , B21D5/00
摘要： There are provided an evaluation method and a prediction method for a technology to be reflected in a press die designing method. A deformation limit evaluation method includes evaluating the deformation limit on a sheared surface of a metal sheet in press-forming the sheared metal sheet. The deformation limit is evaluated and a crack in the sheared surface is predicted based on the relationship between an index value determined from two surface strain distribution gradients of a surface strain distribution gradient in a sheet thickness direction in the sheared surface and a surface strain distribution gradient in a bending ridge line direction by bending in a direction away from the sheared surface at an evaluation position among distributions of strains generated near the boundary between a bending outside surface and the sheared surface of the metal sheet to be bent and a tension generated in the sheared surface.

2. 发明授权

US10413956B2 Press forming method and method of manufacturing press formed product 有权
公开(公告)号：US10413956B2
公开(公告)日：2019-09-17
申请号：US15115470
申请日：2015-01-23
申请人： JFE STEEL CORPORATION
发明人： Toyohisa Shinmiya , Yuji Yamasaki , Eiji Iizuka
IPC分类号： B21D22/26 , B21D53/88 , B21D5/01 , B21D7/06 , B21D11/08
摘要： There is provided a press forming method capable of suppressing a camber back, which occurs in a hat-shaped member while reducing a restriction on a shape of the hat-shaped member. At a time of the press forming, a blank material (4) in which a longitudinal line length is at least longer than a longitudinal line length of a top plate portion of a hat-shaped member (5) is fixed between a pair of press dies (lower die (2), upper die (3)), which have bent surfaces (convex surface (2a), concave surface (3a)), while being warped upward, that is, in a bending direction of the lower die (2) and the upper die (3). Subsequently, for the fixed blank material (4), a bent portion of the hat-shaped member (5) is press formed by using the convex surface (2a) and the concave surface (3a).

3. 发明授权

US09981298B2 Method of producing polygonal closed cross-section structural component with a curved form and polygonal closed cross-section structural component produced by the method 有权
公开(公告)号：US09981298B2
公开(公告)日：2018-05-29
申请号：US14913786
申请日：2014-08-22
申请人： JFE Steel Corporation
发明人： Toyohisa Shinmiya , Yasuhiro Kishigami , Yuji Yamasaki
IPC分类号： B21D5/02 , B21D47/01 , B21D11/08 , B21D22/02 , B21D5/10 , B21C23/12 , B21C35/02 , B21D47/04
CPC分类号： B21D5/02 , B21C23/12 , B21C35/023 , B21C35/026 , B21D5/10 , B21D11/08 , B21D22/02 , B21D47/01 , B21D47/04
摘要： A method of producing a polygonal closed cross-section structural component includes press-forming a metal sheet into a gutter-shaped pre-processed part with a curved form along its longitudinal direction having plural ridge lines corresponding to corner portions of the polygonal closed cross-section in a cross-sectional form developed by cutting the component at a position corresponding to the ridge line located at the innermost side in the radial direction to provide a flange portion extending along the ridge line at the resulting respective ends, and press-forming the pre-processed part to deform inwardly in the cross-sectional direction at a position of one or more of the plural ridge lines to butt the ridge lines located at the innermost side and the flange portions to each other.

4. 发明申请

US20180078993A1 METHOD OF FORMING A CLOSED CROSS-SECTIONAL STRUCTURE 审中-公开
公开(公告)号：US20180078993A1
公开(公告)日：2018-03-22
申请号：US15825953
申请日：2017-11-29
申请人： JFE Steel Corporation
发明人： Kazuhiko Higai , Toyohisa Shinmiya , Yuji Yamasaki
IPC分类号： B21D53/88 , B21D9/08 , B21D5/02
CPC分类号： B21D53/88 , B21D5/015 , B21D5/02 , B21D9/08 , B21D11/08 , B21D26/033 , B21D39/02 , B21D47/01
摘要： A method of forming a closed cross-sectional structure press-forming the plate-shaped workpiece into portions corresponding to bottom portion and left and right side wall portions; and providing bend-facilitating lines at the plurality of bend lines; bending the workpiece in a direction that the portions corresponding to the left and right side wall portions approach each other by pressing a punch into a space between a pair of dies while clamping the portion corresponding to the bottom portion between the punch and a pad in a plate thickness direction; and bending the corresponding portions along the bend-facilitating lines by pressing the corresponding portions against an outer periphery of a plug having an outer peripheral shape the same as a final shape of the closed cross-sectional structure while the plug is placed on the portion of the workpiece corresponding to the bottom portion.

5. 发明授权

US09327327B2 Method of manufacturing pipe with different diameter along a longitudinal direction and die for forming 有权
标题翻译：沿纵向制造具有不同直径的管的成型方法
公开(公告)号：US09327327B2
公开(公告)日：2016-05-03
申请号：US14403674
申请日：2013-05-24
申请人： JFE Steel Corporation
发明人： Toyohisa Shinmiya , Kazuhiko Higai , Yuji Yamasaki , Katsuhiro Ochi
IPC分类号： B21D22/26 , B21C37/16 , B21D5/01 , B21C37/08 , B21D37/16 , B21C37/18
CPC分类号： B21C37/16 , B21C37/0815 , B21C37/185 , B21D5/015 , B21D37/16
摘要： A method of manufacturing a pipe with different diameters along a longitudinal direction that has a small diameter portion, a large diameter portion, and a diameter-changing portion provided between the small diameter portion and the large diameter portion and is formed by press forming a blank made of a metal sheet includes press forming the blank with a U-shape forming die into a U-shaped formed part and press forming the U-shaped formed part with an O-shape forming die set into a circular cross-section formed part. A length of a vertical wall of the U-shape forming die is longer than a length of a vertical wall portion of the U-shaped formed part. In the O-shape forming die set, a die mating line is inclined downwardly, and a ratio t/D of a sheet thickness t of the blank to a diameter D, which represents a diameter of a portion of the O-shape forming die set corresponding to the small diameter portion and a diameter of a portion of the O-shape forming die set corresponding to the large diameter portion, is 0.010≦t/D≦0.080.
摘要翻译：一种制造具有小直径部分，大直径部分和设置在小直径部分和大直径部分之间的直径变化部分的沿着纵向具有不同直径的管的方法，通过压制成型坯由金属片制成，包括用U型成形模将冲压成形为U形成形部，并将O形成形模压制成U形成形部，并将其成型为圆形横截面形成部。 U形成形模的垂直壁的长度比U形成形部的垂直壁部的长度长。在O形成型模组中，模具配合线向下倾斜，坯料的片材厚度t与直径D的比值t / D，其代表O形成模具的一部分的直径对应于小直径部分和对应于大直径部分的O形成模具的一部分的直径设定为0.010＆lt; t / D＆nlE; 0.080。

6. 发明授权

US11590591B2 Press die designing method using an index value obtained from two stress gradients in sheet thickness direction and gradient of surface stress distribution in direction 有权
公开(公告)号：US11590591B2
公开(公告)日：2023-02-28
申请号：US16649866
申请日：2018-08-02
申请人： JFE STEEL CORPORATION
发明人： Kento Fujii , Yusuke Fujii , Yuji Yamasaki
IPC分类号： G01N3/28 , G01N3/24 , B23D15/06
摘要： To prevent a crack from occurring on a sheared end face due to press forming, a technology is provided for evaluating and predicting a crack limit of the sheared end face of a metal sheet and determining press forming conditions. In a deformation limit evaluation method for, when deforming by press forming a metal sheet subjected to shearing, evaluating a deformation limit of the sheared end face of the metal sheet, the deformation limit is evaluated by an index value obtained from two stress gradients at an evaluation position among stress distributions occurring in the vicinity of the sheared end face of the metal sheet due to the press forming, which gradients are a stress gradient in a sheet thickness direction and a stress gradient in a direction away from the sheared end face.

7. 发明申请

US20150375288A1 CLOSED STRUCTURE PARTS, METHOD AND PRESS FORMING APPARATUS FOR MANUFACTURING THE SAME 审中-公开
标题翻译：封闭结构件，其制造方法和压制成型装置
公开(公告)号：US20150375288A1
公开(公告)日：2015-12-31
申请号：US14847288
申请日：2015-09-08
申请人： JFE Steel Corporation
发明人： Kazuhiko Higai , Yuji Yamasaki , Takaaki Hira , Katsuhiro Ochi
IPC分类号： B21D39/03
CPC分类号： B21D39/03 , B21D5/10 , B21D39/00 , B21D39/037 , B21D39/04 , B21D39/048 , B23K1/00 , B23K1/14 , B23K1/16 , B23K1/18 , B30B7/04
摘要： A closed structure part includes a body having a predetermined closed section formed by pressing a blank of a metal plate; and a latch flange portion formed by bending one of two joint ends of the body so that the joint end overlaps an outer surface of the other joint end and latches the other joint end, wherein the joint end and the other joint end overlap in contact and are respectively disposed in singular and continuous planes.
摘要翻译：闭合结构部件包括：具有通过压制金属板的坯料形成的预定的封闭部分的主体; 以及通过弯曲本体的两个接合端之一形成的闩锁凸缘部分，使得接合端部与另一接头端部的外表面重叠并锁定另一接头端部，其中接头端部和另一接头端部接触重叠，分别设置在单一和连续的平面中。

8. 发明申请

US20150292999A1 METHOD AND APPARATUS FOR MEASURING DYNAMIC PANEL STIFFNESS OF OUTER PANEL FOR AUTOMOBILE PARTS 有权
标题翻译：用于测量汽车零件外板动态面板刚度的方法和装置
公开(公告)号：US20150292999A1
公开(公告)日：2015-10-15
申请号：US14437861
申请日：2013-10-30
申请人： JFE STEEL CORPORATION
发明人： Takayuki Futatsuka , Takashi Iwama , Kentaro Sato , Yuji Yamasaki , Youiti Komatu , Eiichi Shiraishi , Kazunari Yoshitomi , Yukiko Hata , Kayo Tokieda
IPC分类号： G01N3/42
CPC分类号： G01N3/42 , G01M11/081 , G01N3/068 , G01N2203/0647
摘要： A method of measuring panel stiffness of an automobile part outer panel by pushing an indenter onto a surface of the panel in a pushing direction intersecting the surface under a load to deform the panel and measuring deformation of the panel includes arranging grids in a lattice form to a surface of a site of the panel; arranging markers previously knowing three-dimensional position information on a periphery of the site; pushing the indenter onto the surface of the site under the load and moving the indenter in a direction perpendicular to the pushing direction, during which the grids on the surface deformed by loading of the indenter are simultaneously and repeatedly shot from plural positions by plural cameras; and calculating position information of the grids corresponding to the markers based on the image data to measure change in deformation of the panel associated with movement of the indenter.
摘要翻译：一种测量汽车部件外板的面板刚度的方法，该方法是通过在压力方向上将压头推压到与表面相交的推力方向上以使面板变形并测量面板的变形来测量面板的刚度，包括以网格形式布置网格面板的一个表面; 先前知道在站点外围的三维位置信息的标记; 将压头推压到载荷下的位置表面上，并沿垂直于推动方向的方向移动压头，在此过程中，通过压头的加载使表面变形的网格由多个相机同时重复地从多个位置拍摄; 以及基于所述图像数据计算与所述标记对应的格栅的位置信息，以测量与所述压头的运动相关联的所述面板的变形的变化。

9. 发明授权

US11052444B2 Method for manufacturing press formed product 有权
公开(公告)号：US11052444B2
公开(公告)日：2021-07-06
申请号：US16634997
申请日：2018-07-25
申请人： JFE Steel Corporation
发明人： Shunsuke Tobita , Toyohisa Shinmiya , Yuji Yamasaki
IPC分类号： B21D5/01 , B21D22/02 , B21D22/26 , B21D22/30 , B21D24/00
摘要： A method for manufacturing a press formed product is disclosed. The method for manufacturing a press formed product includes: when a metal sheet is press formed to manufacture a product having a product shape of a hat-shaped cross-section, in which a top plate part and a flange part are continuous in a width direction through a side wall part and the top plate part and the flange part curve convexly or concavely toward the top plate part along a longitudinal direction, a first step of manufacturing an intermediate component by press forming into a component shape having a hat-shaped cross-section, in which a curve of each of the top plate part and the flange part along the longitudinal direction has a second curvature radius smaller than a curvature radius in the product shape; and a second step of press forming the intermediate component into the product shape.

10. 发明申请

US20200376532A1 METHOD FOR MANUFACTURING PRESS FORMED PRODUCT 审中-公开
公开(公告)号：US20200376532A1
公开(公告)日：2020-12-03
申请号：US16636786
申请日：2018-07-25
申请人： JFE Steel Corporation
发明人： Shunsuke Tobita , Toyohisa Shinmiya , Yuji Yamasaki
IPC分类号： B21D5/06 , B21D22/02
摘要： A method for manufacturing a press formed product is disclosed. The manufacturing method includes a first step of manufacturing an intermediate component by forming the curved part such that a line length along the longitudinal direction of a curved convex side WA is shorter than a line length in the product shape and a line length along the longitudinal direction of a curved concave side WB is longer than a line length in the product shape; and a second step of forming the intermediate component such that a line length of the curved convex side WA is longer than the line length in the first step and a line length of the curved concave side WB is shorter than the line length in the first step.

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