-
1.发明申请公开(公告)号：US20250012562A1
公开(公告)日：2025-01-09
申请号：US18712807
申请日：2022-11-08
Applicant: JFE STEEL CORPORATION
Inventor： Takeshi OGAWA , Satoshi SUMIKAWA , Yuji YAMASAKI , Toyohisa SHINMIYA
Abstract: A press forming analysis method includes: generating a first shape having a same shape as an actual press formed part based on measurement data obtained by measuring a shape after die release of the actual press formed part, the actual press formed part being press-formed with a predetermined tool of press forming by using an actual blank taken from the metal sheet having the shape variation; acquiring a shape of a press formed part after die release as a second shape by performing press forming analysis in a case where press forming is performed with a tool-of-press-forming model having a same shape as the predetermined tool of press forming by using a flat blank model having a flat shape; and determining a portion where both the shapes deviate from each other and a deviation amount by comparing the second shape and the first shape with each other.
-
2.发明申请公开(公告)号：US20250001479A1
公开(公告)日：2025-01-02
申请号：US18708859
申请日：2022-11-08
Applicant: JFE STEEL CORPORATION
Inventor： Takeshi OGAWA , Satoshi SUMIKAWA , Yuji YAMASAKI , Toyohisa SHINMIYA
Abstract: A press forming analysis method predicts an influence of a shape variation of a blank taken from a metal sheet having the shape variation when press forming is performed by using the blank and includes: acquiring a shape of a press formed part after die release as a first shape by performing press forming analysis when press forming is performed with a predetermined tool-of-press-forming model by using a flat blank model; generating a shape variation blank model corresponding to the shape variation; acquiring a shape of a press formed part after die release as a second shape by performing press forming analysis when press forming is performed with the predetermined tool-of-press-forming model by using the shape variation blank model; and acquiring a portion where both of the first and second shapes deviate from each other and a deviation amount by comparing the first and second shapes.
-
公开(公告)号：US20250077739A1
公开(公告)日：2025-03-06
申请号：US18727141
申请日：2022-11-10
Applicant: JFE STEEL CORPORATION
Inventor： Takeshi OGAWA , Satoshi SUMIKAWA , Yuji YAMASAKI , Toyohisa SHINMIYA
IPC: G06F30/23 , G06F30/17 , G06F113/24 , G06F119/02
Abstract: An analysis accuracy evaluation method includes: generating, based on measurement data obtained by measurement of a shape after die release of an actual press-formed part press-formed with a predetermined tool of press forming by utilization of an actual blank taken from a metal sheet having shape variation; generating an actual blank model having a same shape as the actual blank based on measurement data; acquiring a press-formed part shape after die release as an analysis press-formed part shape by performing, by using the actual blank model, a press-forming analysis of when press forming is performed with a model of a tool of press forming which model has a same shape as the predetermined tool of press forming; and comparing the actual press-formed part shape and the analysis press-formed part shape, obtaining a deviation amount of shape change of the both shapes, and evaluating accuracy of the press-forming analysis.
-
公开(公告)号：US20240354473A1
公开(公告)日：2024-10-24
申请号：US18687432
申请日：2022-05-30
Applicant: JFE STEEL CORPORATION
Inventor： Ryo AGEBA , Satoshi SUMIKAWA
IPC: G06F30/27 , G06F113/24 , G06F119/14
CPC classification number: G06F30/27 , G06F2113/24 , G06F2119/14
Abstract: A method of predicting a tension-compression reverse loading behavior predicted by determining a model constant of a material model expressing the tension-compression reverse loading behavior of a metal sheet includes acquiring a value of the model constant of a prediction metal sheet by inputting metal materials test data, including a factor related to a uniaxial tension behavior, of the prediction metal sheet to a learned model that has been caused to perform machine learning using, as an input variable, metal materials test data of a learning metal sheet and using, as an output variable, a value of the model constant, which has been determined based on a tension-compression test of the learning metal sheet. The factor related to a uniaxial tension behavior includes point sequence data obtained by discretizing a stress-strain curve of uniaxial tensile test obtained from a uniaxial tensile test.
-
公开(公告)号：US20220143672A1
公开(公告)日：2022-05-12
申请号：US17602093
申请日：2019-12-27
Applicant: JFE STEEL CORPORATION
Inventor： Satoshi SUMIKAWA
Abstract: A press forming method forms a press-formed product having a hat-shaped cross section and includes: a first forming process of press-forming a preformed part in which a portion corresponding to web corresponding to a web portion, and a portion corresponding to side wall corresponding to a side wall portion and including a twisted side wall portion of a twisted shape along the longitudinal direction, are formed, the preformed part including a portion corresponding to convex curve corresponding to a convex curved portion; and a second forming process of press-forming the preformed part into the press-formed product. The twisted side wall portion at the first forming process is twisted such that an angle between the twisted side wall portion and the portion corresponding to web is larger on an end portion side than at a center of the portion corresponding to convex curve in the longitudinal direction.
-
Patent Agency Ranking
公开(公告)号：US20160121384A1
公开(公告)日：2016-05-05
申请号：US14896229
申请日：2014-04-14
Applicant: JFE STEEL CORPORATION
Inventor： Satoshi SUMIKAWA , Akinobu ISHIWATARI , Jiro HIRAMOTO
IPC: B21D22/02
Abstract: A method of press forming includes: forming a trench-shaped portion into a product shape with a die and a punch until reaching a first bottom dead center, and forms at least one of: a flange portion subject to shrink flange deformation such that a linear length of the flange portion subject to the shrink flange deformation in a longitudinal direction is shorter than a linear length of a flange portion in the product shape; and a flange portion subject to stretch flange deformation such that a linear length of the flange portion subject to the stretch flange deformation in the longitudinal direction is longer than the linear length of the flange portion in the product shape; and forming the formed flange portion into the product shape with the die and a flange forming die until reaching a second bottom dead center.
Abstract translation: 一种压制成形方法包括：通过模具和冲头将沟槽状部分形成为产品形状，直到达到第一下死点，并且形成以下中的至少一个：凸缘部分经受收缩凸缘变形，使得线性 受到收缩凸缘长度方向变形的凸缘部的长度比产品形状中的凸缘部的直线长度短; 以及凸缘部，其经受拉伸凸缘变形，使得在纵向方向上受拉伸凸缘变形的凸缘部分的线性长度比产品形状中的凸缘部分的线性长度长; 并且将所形成的凸缘部分形成为具有模具和凸缘成形模具的产品形状，直到达到第二下死点。
-
7.发明申请STRESS-STRAIN RELATION SIMULATION METHOD, SPRINGBACK-AMOUNT PREDICTION METHOD, AND SPRINGBACK ANALYZER 审中-公开应力 - 应变关系模拟方法，弹簧预测方法和弹簧分析仪公开(公告)号：US20150370936A1
公开(公告)日：2015-12-24
申请号：US14765208
申请日：2014-02-10
Applicant: JFE STEEL CORPORATION
Inventor： Satoshi SUMIKAWA , Akinobu ISHIWATARI
CPC classification number: G06F17/5009 , B21D22/00 , G01N3/08 , G01N33/442 , G01N2203/0075 , G01N2203/0092 , G06F17/16
Abstract: Displacement or a load is applied to an elastic-plastic material to deform the elastic-plastic material plastically to acquire experimental values of a stress-strain relation. With a kinematic-hardening incremental vector dαij of a yield surface in an elastic-plastic constitutive model as a predetermined first equation, the elastic-plastic constitutive model being defined as a function of stress and back stress, a computer identifies material constants contained in the elastic-plastic constitutive model with the acquired experimental values. The computer identifies material constants contained in a predetermined second equation on the basis of the acquired experimental values and the predetermined first equation into which the identified material constants are substituted. The computer simulates the stress-strain relation of the elastic-plastic material with the predetermined first equation, the predetermined second equation, and the elastic-plastic constitutive model into which the identified material constants are substituted.
Abstract translation: 将位移或负载施加到弹性塑料材料上以使塑性材料塑性变形以获得应力 - 应变关系的实验值。 将弹性塑性本构模型中屈服面的运动硬化增量向量dαij作为预定的第一方程，弹塑性本构模型被定义为应力和反应力的函数，计算机识别包含在 弹塑性本构模型与获得的实验值。 计算机基于所获取的实验值和所识别的材料常数被替换的预定的第一方程来识别包含在预定的第二方程中的材料常数。 计算机模拟弹性塑性材料的应力 - 应变关系与预定的第一方程，预定的第二方程以及被识别的材料常数代替的弹性 - 塑性本构模型。
-
8.发明申请公开(公告)号：US20250053706A1
公开(公告)日：2025-02-13
申请号：US18722202
申请日：2022-11-09
Applicant: JFE STEEL CORPORATION
Inventor： Takeshi OGAWA , Satoshi SUMIKAWA , Yuji YAMASAKI , Toyohisa SHINMIYA
IPC: G06F30/23 , G06F30/17 , G06F113/24 , G06F119/18
Abstract: A press forming analysis method includes: a first blank generation step of generating a standard waveform blank model; a first shape acquisition step of acquiring a first shape, which is a shape of press-formed part using standard waveform blank; a second blank generation step of generating a cycle deviation waveform blank model; a second shape acquisition step of acquiring a second shape, which is a shape of press-formed part using cycle deviation waveform blank; and a deviation amount acquisition step of obtaining a portion where both of the shapes deviate from each other and a deviation amount by comparing the first shape with the second shape.
-
9.发明申请公开(公告)号：US20250044082A1
公开(公告)日：2025-02-06
申请号：US18719451
申请日：2022-11-08
Applicant: JFE STEEL CORPORATION
Inventor： Takeshi OGAWA , Satoshi SUMIKAWA , Toyohisa SHINMIYA , Yuji YAMASAKI
Abstract: A press forming analysis method includes: (a) acquiring a shape of a standard press-formed part; (b) generating a waveform blank model; (c) acquiring a shape of a waveform blank press-formed part; (d) comparing the shape of the standard press-formed part and the shape of the waveform blank press-formed part, and obtaining a deviation amount of shape change; (e) generating one or more types of cycle deviation waveform blank models; (f) acquiring a shape of a cycle deviation waveform blank press-formed part; (g) comparing the shape of the standard press-formed part with one or more types of the shape of the cycle deviation waveform blank press-formed part, and obtaining a deviation amount of shape change; and (h) identifying, as a portion requiring countermeasures, a portion having a deviation amount of shape change exceeding a threshold among the deviation amounts of shape change obtained in (d) and (g).
-
公开(公告)号：US20230152195A1
公开(公告)日：2023-05-18
申请号：US17916698
申请日：2020-12-01
Applicant: JFE STEEL CORPORATION
Inventor： Fumiaki TAMASHIRO , Satoshi SUMIKAWA , Masaki URABE
Abstract: A method for identifying a necking limit strain of a metal sheet includes a step of measuring the distribution of strain in a tensile orthogonal direction in a tensile deformation process of a notch root for two or more types of sheet specimens having a notch geometry in a portion of a sheet edge; a step of obtaining a strain increment ratio of the notch root in the tensile deformation process and a strain gradient in the tensile orthogonal direction; a step of obtaining necking limit strain at which necking occurs in the notch root based on the strain increment ratio in the tensile deformation process; and a step of identifying the necking limit strain as a function of the strain gradient from the relation between the necking limit strain obtained for the two or more types of sheet specimens and the strain gradient at that time.
-
-
-
-
-
-
-
-
-
Search Results
11
records
(took 0.015 seconds)
