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1.发明公开公开(公告)号：US20230311187A1
公开(公告)日：2023-10-05
申请号：US18024401
申请日：2021-07-15
发明人： Kinya NAKAGAWA , Toyohisa SHINMIYA , Yuji YAMASAKI
CPC分类号： B21D24/005 , B21D22/26 , B21D43/28
摘要： A method for producing a pressed component and for designing a die applicable even when a component shape that cannot be formed without being greatly drawn is produced. A method for producing a component for press forming a metal sheet into a final component shape through two or more press steps including a step carried out by drawing includes: determining the inflow amount of a material required for forming the metal sheet into the final shape based on the increase in the cross-sectional line length of the shape with respect to the line length of the sheet before forming in the press forming of the sheet into the final component shape by a step; and distributing the determined inflow amount of the material to each step including a final press step, and determining a preformed shape after forming in steps other than the final step based on the inflow amount
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公开(公告)号：US20220212243A1
公开(公告)日：2022-07-07
申请号：US17611854
申请日：2020-02-14
发明人： Hiroto MIYAKE , Toyohisa SHINMIYA , Yuji YAMASAKI
IPC分类号： B21D22/26
摘要： Warpage or torsion in a longitudinal direction is suppressed when an elongated curved component is manufactured by press forming. A method for manufacturing a pressed component includes a first step of press forming a metal sheet in a desired component shape using a first die, and a second step of press forming a formed product using a second die after the first step. In the second step, a cross section of a bent part and a vertical wall part are controlled to be opened depending on warpage at longitudinal end portions of the component by elastic recovery due to release from the first die, thereby suppressing the warpage.
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公开(公告)号：US20240044760A1
公开(公告)日：2024-02-08
申请号：US18255932
申请日：2021-07-29
IPC分类号： G01N3/20
CPC分类号： G01N3/20 , G01N2203/0064 , G01N2203/0067 , G01N2203/0236 , G01N2203/0282
摘要： To further enhance the evaluation accuracy of a delayed fracture. Focusing on the fact that a calculated stress value serving as the reference for the occurrence of the delayed fracture changes depending on analysis conditions of a forming analysis, a value obtained by changing a stress value serving as the reference for the occurrence of the delayed fracture according to the analysis conditions for analyzing an intended formed article (article for practical use) is used as the reference for evaluating the delayed fracture. For example, analysis conditions of a forming analysis in an evaluation test of the delayed fracture are matched with analysis conditions of a forming analysis of an article for practical use represented by an actual automobile component.
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4.发明公开公开(公告)号：US20230264248A1
公开(公告)日：2023-08-24
申请号：US18010126
申请日：2021-06-08
摘要： A shearing work technology of metal sheets, such as high-strength steel sheets, is excellent in stretch flange crack resistance and delayed fracture resistance of the sheared end surface. A metal sheet shearing work method including: applying double shearing work to an end portion of at least one part of the metal sheet; and forming a first area having a cutting margin of a second shearing work of 5 mm or less in first cutting in the double shearing work. Second cutting in the double shearing work is carried out in a state where the movement on an end portion side of the first area is restrained. For example, by providing projection areas continuous to the first area and restraining the projection areas, the movement on the end portion side of the first area is restrained.
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公开(公告)号：US20160158821A1
公开(公告)日：2016-06-09
申请号：US14906240
申请日：2014-07-18
IPC分类号： B21D22/02
摘要： There is provided a method of manufacturing a curved channel part having a curved portion in a vertical wall portion by press forming, the method restricting stretch flange deformation, which occurs in the vertical wall portion and a flange portion. The method includes a shear deformation step as a step of forming the vertical wall portion. In the shear deformation step, a boundary-side portion of a base section of a blank with respect to a deformation section, and an outer portion of the deformation section are individually restrained, a portion to be a vertical wall portion of the deformation section is shear-deformed in a sheet face, and a material is caused to flow from a portion separated from a curved portion toward the curved portion in an outer edge portion of the portion to be the vertical wall portion.
摘要翻译： 提供了一种制造弯曲通道部分的方法，该弯曲通道部分在垂直壁部分中通过冲压成形具有弯曲部分，该方法限制了在垂直壁部分和凸缘部分中发生的拉伸凸缘变形。 该方法包括作为形成垂直壁部的步骤的剪切变形步骤。 在剪切变形步骤中，相对于变形部分的坯料的基部的边界侧部分和变形部分的外部被单独地约束，变形部分的垂直壁部分的部分是 在片状面上产生剪切变形，并使材料从作为垂直壁部的部分的外缘部分的从弯曲部分向弯曲部分分离的部分流动。
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6.发明申请METHOD FOR MANUFACTURING METAL COMPONENT WITH THREE-DIMENSIONAL EDGE AND DIE SETS FOR MANUFACTURING THE SAME 审中-公开用于制造具有三维边缘的金属部件和用于制造其的金属部件的方法公开(公告)号：US20150360272A1
公开(公告)日：2015-12-17
申请号：US14762372
申请日：2014-01-20
IPC分类号： B21D22/02
摘要： A method and die set for manufacturing a metal component with a three-dimensional edge from a blank as a raw material. The blank is cut from a metal sheet and has a curve-shaped curved edge portion with two ends. The method includes providing a bend formation line and forming the three-dimensional shape using a first die and a second die.
摘要翻译： 一种用于制造具有来自坯料的三维边缘作为原料的金属部件的方法和模具。 坯料从金属片切割而成，具有两端曲线状的弯曲边缘部分。 该方法包括提供弯曲形成线并使用第一模具和第二模具形成三维形状。
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7.发明申请公开(公告)号：US20230113628A1
公开(公告)日：2023-04-13
申请号：US17913742
申请日：2021-03-18
发明人： Eiji IIZUKA , Toyohisa SHINMIYA , Takeshi OGAWA
IPC分类号： B21D22/26
摘要： A technology capable of suppressing end cracking due to a delayed fracture without restrictions on the target pressed component shape. When it is estimated that the end cracking due to the delayed fracture in an end of a material to be pressed is concerned, double cutting processing including performing cutting processing of the end containing at least a place where the end cracking is concerned twice is provided as preprocessing for the press forming causing the concern about the end cracking. The double cutting processing includes performing, in first cutting, cutting to form a partial beam-shaped projection portion at a position containing the place where the end cracking is concerned, and cutting the projection portion in second cutting.
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公开(公告)号：US20220234089A1
公开(公告)日：2022-07-28
申请号：US17438350
申请日：2020-03-13
发明人： Kento FUJII , Toyohisa SHINMIYA , Yuji YAMASAKI
IPC分类号： B21D22/26
摘要： A pressing technology for reducing tensile residual stress generated on a sheared edge face of a metal sheet after press forming in order to prevent occurrence of a delayed fracture on the sheared edge face. A pressed component manufacturing method for manufacturing a pressed component by press-forming a metal sheet having a sheared edge face includes a first press forming step in which it is estimated that tensile residual stress is generated in a direction along the sheared edge on a portion of the sheared edge face of the metal sheet after die release, in which the method includes, as a subsequent step to the first press forming step, a tensile residual stress relaxation step of bulging, in the sheet thickness direction, a region that includes at least a site on a sheared edge face where it is estimated that the tensile residual stress is generated.
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公开(公告)号：US20220187175A1
公开(公告)日：2022-06-16
申请号：US17438302
申请日：2020-03-13
发明人： Kento FUJII , Toyohisa SHINMIYA , Yuji YAMASAKI
摘要： A method includes two or more reference strain gradient information being a relationship between the strain at the hole edge and a strain gradient along a radial direction. Hole expansion forming is performed on the evaluation metal sheet under the same forming conditions as respective forming conditions corresponding to at least two pieces of the reference strain gradient information to obtain at least two limit hole expansion ratios at a hole expansion limit of the evaluation metal sheet. A formable region of the evaluation metal sheet is obtained from the at least two pieces of the reference strain gradient information and the obtained at least two limit hole expansion ratios at the hole expansion limit. Stretch flange cracking at the sheared end face of the evaluation metal sheet is evaluated by the obtained formable region.
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10.发明申请公开(公告)号：US20210114075A1
公开(公告)日：2021-04-22
申请号：US16970467
申请日：2019-02-21
发明人： Hiroto MIYAKE , Toyohisa SHINMIYA , Yuji YAMASAKI
摘要： A metal sheet for press forming has a shape such that a boundary position between the region corresponding to the curved portion and an other region in the region corresponding to a curved portion is rotationally displaced in-plane around a rotational center set at a position on a curved recessed side rather than a position corresponding to a ridge line between a top sheet portion and a vertical wall portion on the curved recessed side, in a direction in which a line length of an outer edge of a position to be formed into the flange portion on a curved protruding side in the region corresponding to a curved portion approaches a line length of an outer edge of the flange portion on the curved protruding side in the press-formed component shape.
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