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公开(公告)号：EP3932578B1
公开(公告)日：2024-11-06
申请号：EP19916684.4
申请日：2019-12-19
发明人： FUJII, Kento , YAMASAKI, Yuji
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2.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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3.发明公开
公开(公告)号：EP4420805A1
公开(公告)日：2024-08-28
申请号：EP22910452.6
申请日：2022-08-18
IPC分类号： B21D22/00
CPC分类号： B21D22/00
摘要： A press formed part fracture determination method according to the present invention is a method as a basis for deciding a countermeasure for a fracture of a press formed part 21 in which a fracture has occurred. The method includes: performing press forming of a test piece 31 so as to reproduce a stress state in a press forming process of a bent portion 23, which is a fracture occurrence portion in the press formed part 21, and determining occurrence/non-occurrence of a micro crack in a stress state reproduction portion 33 of the test piece 31 (P1); and determining, when it is determined that the micro crack has occurred in the stress state reproduction portion 33, that there is occurrence of a fracture in the press forming process, and determining, when it is determined that no micro crack has occurred in the stress state reproduction portion 33, that there is a fracture in springback after the press forming (P3).
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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：EP4272883A1
公开(公告)日：2023-11-08
申请号：EP22784443.8
申请日：2022-03-15
摘要： A steel pipe out-of-roundness prediction model generation method according to the present invention includes: executing a numerical computation in which an input data is an operational condition dataset including one or more operational parameters selected from operational parameters of a U-press step and one or more parameters selected from operational parameters of an O-press step, and an output data is a steel pipe out-of-roundness information after a pipe expanding step, with the execution of the calculation conducted a plurality of times while changing the operational condition dataset, and generating, by the execution of the numerical computation, a plurality of pairs of data of the operational condition data set and the steel pipe out-of-roundness information data after the pipe expanding step corresponding to the operational condition dataset, as training data; and then generating an out-of-roundness prediction model for which an input data is the operational condition dataset and an output data is the out-of-roundness information of the steel pipe after the pipe expanding step, the generation of the out-of-roundness prediction model performed by machine learning using the plurality of pairs of training data.
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7.发明公开
公开(公告)号：EP4110970A1
公开(公告)日：2023-01-04
申请号：EP21707718.9
申请日：2021-03-01
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公开(公告)号：EP4104946A1
公开(公告)日：2022-12-21
申请号：EP20919234.3
申请日：2020-10-02
发明人： FUJII, Yusuke , URABE, Masaki , TOBITA, Shunsuke
IPC分类号： B21D22/00
摘要： A shape change prediction method for a press formed part according to the present invention predicts a shape change due to stress relaxation over time after a press formed part 1 having a punch shoulder 9 and/or a die shoulder 11 is released from a press-forming die and springs back, and includes a step of acquiring a shape and a residual stress of the press formed part 1 immediately after the springback by a springback analysis of the press formed part 1 (Sl), a step of setting a value of residual stress, which is acquired by relaxation and reduction of a residual stress of the punch shoulder 9 and/or the die shoulder 11 of the press formed part 1 immediately after the springback, with respect thereto (S3), and a step of determining a shape in which moments of force are balanced with respect to the press formed part 1 in which the value of the residual stress in the punch shoulder 9 and/or the die shoulder 11 is relaxed, reduced, and set (S5).
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公开(公告)号：EP3434384B1
公开(公告)日：2022-09-07
申请号：EP17182960.9
申请日：2017-07-25
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公开(公告)号：EP3666409B1
公开(公告)日：2022-05-11
申请号：EP18844874.0
申请日：2018-07-25
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