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公开(公告)号：EP4450180A1
公开(公告)日：2024-10-23
申请号：EP22922051.2
申请日：2022-11-10
IPC分类号： B21D22/00 , G06F30/10 , G06F30/23 , G06F111/10 , G06F113/22
摘要： An analysis accuracy evaluation method of a press-forming analysis according to the present invention includes: an actual shape generation step S1 of generating an actual press-formed part shape 3 having the same shape as 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 a shape variation; a blank model generation step S3 of generating an actual blank model 5 having the same shape as the actual blank; an analysis shape acquisition step S5 of performing a press-forming analysis with a model of a tool of press forming, which model has the same shape as the predetermined tool of press forming, by using the actual blank model 5 and acquiring an analysis press-formed part shape 7; and an evaluation step S7 of comparing the actual press-formed part shape 3 with the analysis press-formed part shape 7, obtaining a deviation amount of shape change of the both shapes, and evaluating accuracy of the press-forming analysis based on the deviation amount of shape change.
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公开(公告)号：EP3960321A1
公开(公告)日：2022-03-02
申请号：EP19926276.7
申请日：2019-12-27
发明人： SUMIKAWA, Satoshi
摘要： A press forming method according to the present invention is to form a press-formed product 1 having a hat-shaped cross section with a web portion 3, a side wall portion 5, and a flange portion 7, and including a convex curved portion 11 convexly curved in a height direction along a longitudinal direction in side view. The press forming method includes: a first forming process of press-forming a preformed part 21 in which a portion 23 corresponding to web, and a portion 25 corresponding to side wall including a twisted side wall portion 25a of a twisted shape along the longitudinal direction, are formed, the preformed part 21 including a portion 31 corresponding to convex curve; and a second forming process of press-forming the preformed part 21 into the press-formed product 1 having a target shape. The twisted side wall portion 25a at the first forming process is twisted such that an angle between the twisted side wall portion 25a and the portion 23 corresponding to web is larger on an end portion side than at a center of the portion 31 corresponding to convex curve in the longitudinal direction.
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3.发明公开STRESS-STRAIN RELATIONSHIP SIMULATION METHOD, SPRING BACK PREDICTION METHOD, AND SPRING BACK ANALYZING DEVICE 审中-公开应力 - 应变关系模拟方法，回弹预测方法和回弹分析装置
公开(公告)号：EP2975377A1
公开(公告)日：2016-01-20
申请号：EP14765635.9
申请日：2014-02-10
CPC分类号： G06F17/5009 , B21D22/00 , G01N3/08 , G01N33/442 , G01N2203/0075 , G01N2203/0092 , G06F17/16
摘要： 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 dα ij 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.
摘要翻译： 对弹性塑料材料施加位移或载荷以塑性变形弹塑性材料以获得应力 - 应变关系的实验值。 在弹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背应力的函数，计算机识别包含在材料中的材料常数 弹塑性本构模型与获得的实验值。 计算机基于获取的实验值和预定的第一方程识别包含在预定的第二方程中的材料常数，其中识别的材料常数被替换为其中。 计算机利用预定的第一方程，预定的第二方程和弹性塑性本构模型来模拟弹塑性材料的应力 - 应变关系，其中识别出的材料常数被替代。
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4.发明公开
公开(公告)号：EP4446026A1
公开(公告)日：2024-10-16
申请号：EP22920434.2
申请日：2022-11-08
摘要： A press forming analysis method according to the present invention includes: a shape acquisition step of a standard press-formed part; a generation step of a waveform blank model of generating a waveform blank model 7; a shape acquisition step of a press-formed part using the waveform blank model of acquiring a shape 9 of a waveform blank press-formed part; a first deviation amount acquisition step of obtaining a deviation amount of shape change between the shape 5 of the standard press-formed part and the shape 9 of the waveform blank press-formed part; a generation step of a cycle deviation waveform blank model of generating a cycle deviation waveform blank model 11; a shape acquisition step of a press-formed part using the cycle deviation waveform blank model of acquiring a shape 13 of a cycle deviation waveform blank press-formed part; a second deviation amount acquisition step of obtaining a deviation amount of shape change between the shape 5 of the standard press-formed part and the shape 13 of the cycle deviation waveform blank press-formed part; and a step to identify portions requiring countermeasures of identifying a portion requiring countermeasures.
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公开(公告)号：EP4378604A1
公开(公告)日：2024-06-05
申请号：EP22863958.9
申请日：2022-05-30
发明人： AGEBA, Ryo , SUMIKAWA, Satoshi
摘要： In a method of predicting a tension-compression reverse loading behavior of a metal sheet according to the present invention, a tension-compression reverse loading behavior is predicted by determining a model constant of a material model. The method includes a step of 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 and using, as an output variable, a value of the model constant, which has been determined based on a tension-compression test of the metal sheet, in which 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.
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公开(公告)号：EP3015185B1
公开(公告)日：2017-03-08
申请号：EP14817881.7
申请日：2014-04-14
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7.发明公开
公开(公告)号：EP4420804A1
公开(公告)日：2024-08-28
申请号：EP22903944.1
申请日：2022-11-08
摘要： A press forming analysis method according to the present invention includes: a first shape acquisition step S1 in which press forming analysis is performed by using a flat blank model 3 and a shape of a press formed part after die release is acquired as a first shape 5; a generation step S3 in which a shape variation blank model 7 is generated; a second shape acquisition step S5 in which press forming analysis is performed by using the shape variation blank model 7 and a shape of a press formed part after die release is acquired as a second shape 9; and a deviation amount acquisition step S7 in which the first shape 5 and the second shape 9 are compared with each other and a portion where both the shapes deviate from each other and a deviation amount are determined.
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公开(公告)号：EP3260215B1
公开(公告)日：2019-09-04
申请号：EP16752292.9
申请日：2016-02-03
发明人： SUMIKAWA, Satoshi , URABE, Masaki , HIRAMOTO, Jiro
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公开(公告)号：EP3260215A1
公开(公告)日：2017-12-27
申请号：EP16752292.9
申请日：2016-02-03
发明人： SUMIKAWA, Satoshi , URABE, Masaki , HIRAMOTO, Jiro
摘要： This press forming method includes: a first step for forming such that linear length in the longitudinal direction of a flange portion undergoing stretch flange deformation is greater than linear length of the flange portion in a product shape and linear length in the longitudinal direction of a flange portion undergoing shrink flange deformation is shorter than the linear length of the flange portion in the product shape by forming using a tool of press forming (1) wherein the linear length in the cross-sectional direction of a jointing portion (3c) in contact with the flange portion undergoing stretch flange deformation or the flange portion undergoing shrink flange deformation is a linear length (L 1 ) in the cross-sectional direction shorter than a linear length (L 2 ) in the cross-sectional direction where the linear length in the cross-sectional direction of the jointing portion (3c) in a second tool of press forming (3) for obtaining the product shape is set to (L 2 ); and a second step for forming the product shape using the second tool of press forming (3) wherein the linear length in the cross-sectional direction of the jointing part (3c) is (L 2 ).
摘要翻译： 该压制成型方法包括：第一步，用于形成使得在进行拉伸凸缘变形的凸缘部分的纵向上的线性长度大于产品形状中的凸缘部分的线性长度和在凸缘的纵向上的线性长度 （3c）的横截面方向上的直线长度与接触部分（3c）的直线长度相比，通过使用压模成形工具（1）形成，产品形状中经受收缩凸缘变形的部分短于凸缘部分的线性长度 凸缘部分经历拉伸凸缘变形或凸缘部分经受收缩凸缘变形的情况下，在截面方向上的线性长度（L1）比截面方向上的线性长度（L2）短的线性长度（L2） （L2）为第二压制成型用工具（3）中的接合部（3c）的截面方向的截面积。 以及使用第二冲压成形工具（3）形成产品形状的第二步骤，其中，连接部分（3c）的横截面方向上的直线长度是（L2）。
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10.发明公开SPRINGBACK CAUSE IDENTIFICATION METHOD AND SPRINGBACK CAUSE IDENTIFICATION DEVICE 审中-公开方法后悬挂事业的用于识别的后悬架原因和鉴定设备
公开(公告)号：EP2902127A1
公开(公告)日：2015-08-05
申请号：EP13840485.0
申请日：2013-08-15
CPC分类号： G01L5/00 , B21D22/00 , G06F17/5018 , Y02T10/82
摘要： A method of identifying a cause of springback includes a step of performing a press forming analysis, a step of performing a springback analysis on the basis of information acquired by the press forming analysis, a step of dividing a shape of a press forming product acquired by the press forming analysis into a plurality of regions, a step of changing Young's modulus in a designated direction in any region of the divided regions, a step of performing the springback analysis on the press forming product whose Young's modulus is changed, a step of acquiring springback amount differences on the basis of multiple springback, analysis results, and a step of identifying the cause of the springback on the basis of the acquired springback amount differences.
摘要翻译： 识别回弹的原因的方法，包括进行冲压成形分析，由压制成形的分析，将所获取的冲压成形品的形状的步骤中获取的信息的基础上执行回弹分析的步骤的步骤 在压制成形分析成区域的复数，在所划分的区域中的任何区域变更的杨氏模量在指定的方向的步骤，对所述压制成形产品，其杨氏模量的回弹分析的步骤改变时，获得的一个步骤 多个弹回，结果分析和识别弹簧的原因背面的所获取的回弹量的差异的基础上的一个步骤的基础上，回弹量的差异。
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