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1. 发明公开

EP4454777A1 PRESS-MOLDING METHOD AND PRESS-MOLDED ARTICLE MANUFACTURING METHOD 失效
公开(公告)号：EP4454777A1
公开(公告)日：2024-10-30
申请号：EP22926050.0
申请日：2022-11-10
申请人： JFE Steel Corporation
发明人： TOBITA, Shunsuke
IPC分类号： B21D22/20 , B21D22/26 , B21D24/00
CPC分类号： B21D22/26 , B21D24/00 , B21D22/20
摘要： A press forming method and a press formed part manufacturing method according to the present invention correspond to a method of forming a press formed part 1, the press formed part 1 including: a top portion 3 having a convex peripheral edge 3a having a whole of or part of an outer peripheral edge curved outward in a convex shape; a side wall portion 5 continuous to the top portion 3 via a punch shoulder R portion 23; and a flange portion 7 continuous to the side wall portion 5 via a die shoulder R portion 25. The method includes: a first forming step of forming a metal sheet into a preformed part 17; a second forming step of forming the preformed part 17 formed in the first forming step into the press formed part 1 having a target shape. The first forming step performs forming such that a bending radius of the die shoulder R portion 25 formed corresponding to at least the convex peripheral edge 3a of the top portion 3 of the preformed part 17 is larger than a bending radius of the die shoulder R portion 25 of the press formed part 1 having the target shape.

2. 发明公开

EP4424342A1 HOLLOW MEDICAL NEEDLE, AND METHOD FOR PRODUCING HOLLOW MEDICAL NEEDLE 审中-实审
公开(公告)号：EP4424342A1
公开(公告)日：2024-09-04
申请号：EP22887217.2
申请日：2022-10-31
申请人： NIPRO CORPORATION
发明人： MASUDA, Toshiaki , NAKAGAMI, Hiroyuki , SUZUKI, Ken
IPC分类号： A61M5/158 , A61M1/36 , B21D22/26 , B21G1/08
CPC分类号： B21D22/26 , B21G1/08 , A61M5/158 , A61M1/36
摘要： Provided is a medical hollow needle with a novel structure that allows the efficient passage of blood or other liquids. A medical hollow needle 10 has an inner lumen 12 penetrating it in a direction of a needle axis. An inner circumferential surface 16 of a needle tube 14 constituting a circumferential wall of the inner lumen 12 has a tapered surface 30 with a diameter becoming smaller toward a needle tip 18 formed by deep drawing. An arithmetic mean roughness Ra of the inner circumferential surface 16 in the direction of the needle axis is set as Ra≤1.0µm.

3. 发明公开

EP4302894A1 MANUFACTURING METHOD FOR VEHICLE SUSPENSION ARM, AND VEHICLE SUSPENSION ARM 审中-实审
公开(公告)号：EP4302894A1
公开(公告)日：2024-01-10
申请号：EP21929097.0
申请日：2021-03-05
申请人： Yorozu Corporation
发明人： TSUCHIDA, Tomo , IGARASHI, Masahiro , HOSOI, Masahiro
IPC分类号： B21D22/20 , B21D22/26 , B21D53/88 , B60G7/00
摘要： [Problem] To provide a method for manufacturing a vehicle suspension arm that can satisfy quality (coaxiality and circularity) of a pair of through-holes and a vehicle suspension arm.
[Solution] Stepwise bending in the method for manufacturing a vehicle suspension arm includes a first bending step and a second bending step. In the first bending step, preliminary bending is performed while holding a portion that composes a base portion 23 of a body portion 20 and a portion that composes first coupling portions 31 in a workpiece W by a punch 106 (first punch). In the second bending step, while holding of the portion that composes the first coupling portions by the first punch is released subsequently to the first bending step, bending is performed along a fold 72 given by the first bending step while holding the portion that composes the base portion 23 of the body portion 20 by a punch 108 (second punch).

4. 发明公开

EP4286069A1 PRESS LINE, PRESS FORMING CONDITION CALCULATION METHOD, AND PRESS FORMING CONDITION CALCULATION PROGRAM 审中-实审
公开(公告)号：EP4286069A1
公开(公告)日：2023-12-06
申请号：EP22763389.8
申请日：2022-03-03
申请人： JFE Steel Corporation
发明人： MIYAKE, Hiroto
IPC分类号： B21D22/26 , B21D22/00 , B21D22/20 , G06F30/27 , G06F113/22
摘要： A press line according to the present invention includes: a first press machine configured to shear an outer peripheral portion of a metal material by using a blanking die; a second press machine configured to form a press-formed component by performing press forming on the metal material sheared by the first press machine with a forming die; a preprocessing device provided on a downstream side of the first press machine and configured to perform predetermined preprocessing on the metal material; a measurement instrument configured to measure information on a material characteristic value of the metal material before the press forming; and a control device configured to calculate a press forming condition for inhibiting occurrence of a forming defect for a metal material to be formed by inputting the material characteristic value of the metal material to be formed measured by the measurement instrument and manufacturing information to a machine learning model that uses, as input, the material characteristic value of the metal material and the manufacturing information and uses, as output, a press forming condition of the metal material for inhibiting the occurrence of a forming defect, and perform feedforward control on at least one of the second press machine and the preprocessing device under the calculated press forming condition.

5. 发明公开

EP4227017A1 PRESS-MOLDED ARTICLE 审中-实审
公开(公告)号：EP4227017A1
公开(公告)日：2023-08-16
申请号：EP21897393.1
申请日：2021-07-02
申请人： JFE Steel Corporation
发明人： FUJII, Yusuke , URABE, Masaki
IPC分类号： B21D22/26 , B21D22/20
摘要： A press forming part 1 according to the present invention includes: a top portion 3; a side wall portion 7 continuous from the top portion 3 via a punch shoulder 5; and a flange portion 11 continuous from the side wall portion 7 via a die shoulder 9, the press forming part having a curved portion 13 curved in a recessed manner in a top view, wherein a bending radius of the die shoulder 9 in the curved portion 13 is increased from an end side toward a middle portion of the curve.

6. 发明公开

EP4209287A1 PRESSED COMPONENT MANUFACTURING METHOD, MOLD DESIGNING METHOD, MOLD SHAPE DESIGNING DEVICE, AND MOLD 审中-实审
公开(公告)号：EP4209287A1
公开(公告)日：2023-07-12
申请号：EP21863962.3
申请日：2021-07-15
申请人： JFE Steel Corporation
发明人： NAKAGAWA, Kinya , SHINMIYA, Toyohisa , YAMASAKI, Yuji
IPC分类号： B21D22/00 , B21D22/26
摘要： There is provided a pressed component manufacturing method applicable even when a pressed component shape that cannot be formed without being greatly drawn is manufactured. In press forming a metal sheet into a final component shape through two or more press steps including a press step, the inflow amount of a material required for forming the metal sheet into the final component shape is determined based on the increase in the cross-sectional line length of the final component shape with respect to the line length before forming when the metal sheet is press formed into the final component shape by a single press step, the determined inflow amount of the material is distributed to each step including a final press step, and a preformed shape after press forming in the steps other than the final press step based on the distributed inflow amount. As the cross section, a line orthogonal to, in plan view, a direction in which the material flows when the metal sheet is drawn is set, and a plurality of cross sections is set which is individually cut by each of planes orthogonal to the line in plan view and extending in a direction along the sheet thickness direction of the metal sheet before forming.

7. 发明授权

EP3372322B1 METHOD FOR MANUFACTURING PRESS-MOLDED ARTICLE, PRESS DEVICE, AND PRESS LINE 有权转让
公开(公告)号：EP3372322B1
公开(公告)日：2023-05-10
申请号：EP16873021.6
申请日：2016-12-07
发明人： SUZUKI, Toshiya , NAKAZAWA, Yoshiaki , NAKATA, Masahiro
IPC分类号： B21D22/26 , B21D53/88

8. 发明公开

EP4137245A1 PRESS-FORMING MOLD AND PRESS-FORMING METHOD 审中-实审
公开(公告)号：EP4137245A1
公开(公告)日：2023-02-22
申请号：EP21813956.6
申请日：2021-04-08
申请人： JFE Steel Corporation
发明人： AGEBA, Ryo
IPC分类号： B21D24/00 , B21D22/26 , B21D19/08
摘要： A press forming tool 13 according to the present invention are configured to form a press forming part 1, the press forming part 1 including: a top portion 3 having a convex and concave outer edge part 11 in which a convex outer edge part 11a protruding outward in an in-plane direction and a concave outer edge part 11b recessed inward in the in-plane direction are continuous to each other via a connecting outer edge part 11c; and a flange portion 5 formed continuously from the convex and concave outer edge part 11 of the top portion 3, the press forming tool 13 including: an upper die 15 and a lower die 17; and a lower pad 21 and an upper pad 23, which sandwich a blank 19 in cooperation with the upper die 15 and the lower die 17, in which, during an initial stage of forming, the flange portion 5 is formed on the convex outer edge part 11a, and a torsional shape portion 25 having a torsional shape toward the concave outer edge part 11b is formed continuously from the flange portion 5, and during a late stage of forming, the torsional shape portion 25 is formed into the flange portion 5, and the flange portion 5 is formed in the concave outer edge part 11b so as to achieve formation of a target shape.

9. 发明公开

EP4129514A1 METHOD FOR MANUFACTURING PRESSED COMPONENT, METHOD FOR MANUFACTURING BLANK MATERIAL, AND STEEL SHEET 审中-实审
公开(公告)号：EP4129514A1
公开(公告)日：2023-02-08
申请号：EP21782063.8
申请日：2021-03-18
申请人： JFE Steel Corporation
发明人： IIZUKA, Eiji , SHINMIYA, Toyohisa , OGAWA, Takeshi
IPC分类号： B21D22/20 , B21D22/26
摘要： There is provided 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.

10. 发明公开

EP4043117A1 MOLDED PRODUCT, STRUCTURAL MEMBER USING SAME, AND MOLDED PRODUCT MANUFACTURING METHOD 审中-公开
公开(公告)号：EP4043117A1
公开(公告)日：2022-08-17
申请号：EP19948793.5
申请日：2019-10-09
申请人： NIPPON STEEL CORPORATION
发明人： OTSUKA, Kenichiro
IPC分类号： B21D22/26 , B21D5/01 , B62D25/00
摘要： A long formed article made of one steel sheet includes a top sheet portion extending in a longitudinal direction, a standing wall portion extending downward from each of both edges of the top sheet portion in a width direction, and a protrusion portion formed in a portion of the top sheet portion in the longitudinal direction by overlapping a portion extending toward an outside from each of both ends of the top sheet portion in the width direction and a portion extending toward the outside from an upper end of the standing wall portion, in a non-protrusion region, a recessed part extending in the longitudinal direction is formed in the top sheet portion, and a total value α of inner surface peripheral lengths of the top sheet portion and the standing wall portion in a cross section of the formed article perpendicular to the longitudinal direction in a protrusion region and a total value β of inner surface peripheral lengths of the top sheet portion, the standing wall portion, and the recessed part in the cross section of the formed article perpendicular to the longitudinal direction in the non-protrusion region satisfy 1.01 ≤ β/α ≤ 1.50.

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