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1.发明公开公开(公告)号：US20230407511A1
公开(公告)日：2023-12-21
申请号：US18029816
申请日：2021-06-16
Applicant: JFE STEEL CORPORATION
Inventor： Kazuhiko HIGAI , Tsuyoshi SHIOZAKI , Yoshikiyo TAMAI
Abstract: A method includes: manufacturing an automotive crashworthiness energy absorbing part; and assembling an automotive body by attaching the manufactured automotive crashworthiness energy absorbing part to the automotive body, wherein the manufacturing the automotive crashworthiness energy absorbing part includes: manufacturing a pre-coated part including a tubular member formed using a hat-shaped section member including a top portion and a side wall portion, and a coating part having quality of material with a strength lower than that of the tubular member, the coating part being disposed with a gap of 0.2 mm to 3 mm on an outer surface of a portion including a corner connecting the top portion and the side wall portion in the tubular member to form a coating film; and forming a coating film by forming a coating layer by electrodeposition coating in at least the gap in the pre-coated part, and thermally curing the coating layer.
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公开(公告)号：US20230219623A1
公开(公告)日：2023-07-13
申请号：US18009583
申请日：2021-03-19
Applicant: JFE STEEL CORPORATION , IIDA INDUSTRY CO., LTD.
Inventor： Kazuhiko HIGAI , Tsuyoshi SHIOZAKI , Yoshikiyo TAMAI , Shigeaki KITAMURA , Naoki MABUCHI
CPC classification number: B62D21/15 , B62D29/004
Abstract: An automotive crashworthiness energy absorptive part absorbs crashworthiness energy by crushing axially when a crashworthiness load is input from a front side or a rear side of an automotive body, and includes: a tubular member formed of a steel sheet with a tensile strength of 590 MPa to 1180 MPa, the tubular member including a top portion and a pair of side wall portions continuous from both ends of the top portion via corner portions; a closed cross section space forming wall member formed of a steel sheet with a tensile strength lower than the tubular member, the closed cross section space forming wall member being disposed on an inner surface side of the tubular member and forming a closed cross section space between the closed cross section space forming wall member and at least the corner portion; and a resin provided in the closed cross section space.
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3.发明公开公开(公告)号：US20240092425A1
公开(公告)日：2024-03-21
申请号：US18276146
申请日：2021-10-29
Applicant: JFE STEEL CORPORATION
Inventor： Toshiharu ISHIKAWA , Kazuhiko HIGAI , Tsuyoshi SHIOZAKI
CPC classification number: B62D21/152 , B60R19/34 , B62D29/001
Abstract: A crash energy absorption part for an automobile is provided in a front portion or a rear portion of an automotive body and absorbing crash energy when a crash load is input from a front or a rear of the automotive body, and includes: a top portion; a tubular member including a side wall portion continuous with the top portion via a shoulder part of a punch; and a resin applied or patched to at least an inner surface of the shoulder part of a punch of the tubular member. The resin has a thickness gradually changing in an axial direction from one end side toward other end side, a thickest portion of the thickness is 8 mm or less, and the resin is bonded to the inner surface with an adhesive strength of 10 MPa or more and is axially crushed when the crash load is input.
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公开(公告)号：US20230257899A1
公开(公告)日：2023-08-17
申请号：US18012719
申请日：2021-05-10
Applicant: JFE STEEL CORPORATION
Inventor： Kazuhiko HIGAI , Tsuyoshi SHIOZAKI , Yoshikiyo TAMAI
IPC: C25D13/14
CPC classification number: C25D13/14 , B62D21/152
Abstract: An automotive crashworthiness energy absorption part includes a tubular member formed by using a hat-shaped section part including a top portion and a side-wall portion; a coating part made of a material having a lower strength than the tubular member, the coating part being arranged on outer surfaces of the top portion and the side-wall portion at a portion including a corner portion configured to connect the top portion and the side-wall portion, with a gap of 0.2 mm or more and 3 mm or less from the outer surface of the top portion, the outer surface of the side-wall portion, and an outer surface of the corner portion; and a coating film of an electrodeposition paint formed in the gap.
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公开(公告)号：US20250010918A1
公开(公告)日：2025-01-09
申请号：US18709912
申请日：2022-10-27
Applicant: JFE STEEL CORPORATION
Inventor： Toshiharu ISHIKAWA , Kazuhiko HIGAI , Tsuyoshi SHIOZAKI
Abstract: A lower structure of automotive body of an automobile includes: side sills arranged on both sides of an automotive body lower portion along a vehicle longitudinal direction; a floor cross member arranged between the side sills and having both side portions fixed to upper portions of the side sills; and a battery case arranged below the floor cross member and having both side portions facing lower portions of the side sills. Each of the side sills includes: a partition member that vertically passes a closed sectional space in the side sill, and has a structure in which the closed sectional space is partitioned into a first closed sectional space and a second closed sectional space in a vehicle width direction by the partition member; and an impact absorbing structure.
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Patent Agency Ranking
公开(公告)号：US20220258804A1
公开(公告)日：2022-08-18
申请号：US17624648
申请日：2020-03-25
Applicant: JFE STEEL CORPORATION
Inventor： Kazuhiko HIGAI , Tsuyoshi SHIOZAKI
Abstract: An automotive crashworthiness energy absorption part for being provided on a front part or a rear part of an automotive body includes: a tubular member formed using a hat-shaped section part including a top portion and a side-wall portion; a coating part configured to form a coating film arranged with a gap of 0.2 mm to 3 mm from an inner surface of the top portion, an inner surface of the side-wall portion, and an inner surface of a corner portion, on a portion including the corner portion connecting the top portion to the side-wall portion in the inner surfaces of the top portion and the side-wall portion, the coating part being made of a material having strength lower than the tubular member; and a coating film of an electrodeposition paint formed in the gap.
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公开(公告)号：US20220089223A1
公开(公告)日：2022-03-24
申请号：US17429101
申请日：2019-12-12
Applicant: JFE STEEL CORPORATION
Inventor： Kazuhiko HIGAI , Tsuyoshi SHIOZAKI , Yoshikiyo TAMAI , Shigeaki KITAMURA , Naoki MABUCHI
Abstract: A crashworthiness energy absorption part includes: a tubular member having tensile strength of 590 to 1180 MPa grade; a closed cross section space forming wall part having tensile strength lower than the tubular member and having both edge portions joined to inner surfaces of a pair of side wall portions of the tubular member, and forming a closed cross section space between the closed cross section space forming wall part and a part of a peripheral wall portion of the tubular member; and a resin configured to fill the closed cross section space, includes a rubber-modified epoxy resin and a curing agent, and has tensile breaking elongation of 80% or more, adhesive strength to the tubular member and closed cross section space forming wall part of 12 MPa or higher, and a compression nominal stress of 6 MPa or higher at a compression nominal strain of 10%.
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公开(公告)号：US20220219631A1
公开(公告)日：2022-07-14
申请号：US17607909
申请日：2019-12-27
Applicant: JFE STEEL CORPORATION
Inventor： Kazuhiko HIGAI , Tsuyoshi SHIOZAKI , Yoshikiyo TAMAI
Abstract: An automotive crashworthiness energy absorption part provided at a front part or a rear part of an automotive body and absorbing crashworthiness energy by undergoing axial crush when receiving input of a crashworthiness load from a front or a rear of the automotive body includes: a tubular member configured to absorb crashworthiness energy by undergoing axial crush, the tubular member including a top portion and side wall portions continuous with the top portion; and resin coated or patched on first outer surfaces including at least outer surfaces of the top portion and the side wall portions of the tubular member. The coated or patched resin has a thickness of 8 mm or less after being heated, forms at least part of a peripheral wall portion of a closed cross section space, and is bonded to the first outer surfaces with an adhesive strength of 10 MPa or more.
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公开(公告)号：US20220081038A1
公开(公告)日：2022-03-17
申请号：US17419365
申请日：2019-09-06
Applicant: JFE STEEL CORPORATION
Inventor： Kazuhiko HIGAI , Tsuyoshi SHIOZAKI
Abstract: An automotive frame part is provided to a side portion of an automotive body and absorbs crashworthiness energy by bending upon receiving a crashworthiness load from a side of the automotive body. The automotive frame part includes: a member having a hat-shaped cross section or a U-shaped cross section and including a top portion, and a pair of side wall portions that are continuous from the top portion via punch shoulder R portions; and resin that is coated on or patched to an internal surface of the member having the hat-shaped cross section member or the U-shaped cross section. The resin extends at least to a predetermined range toward the top portion and the side wall portions on both sides of the punch shoulder R portions, and is adhered, after heating, to the internal surface at an adhesive strength of 10 MPa or higher at a room temperature.
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公开(公告)号：US20210206244A1
公开(公告)日：2021-07-08
申请号：US16754660
申请日：2018-09-13
Applicant: JFE STEEL CORPORATION
Inventor： Koichi NAKAGAWA , Takanobu SAITO , Kazuhiko HIGAI , Yoshikiyo TAMAI
Abstract: A stiffening structure for an automotive door panel part according to the present invention includes a door outer panel 3 made of a metal sheet curved along a height direction, and in which a character line 3a is formed; and an impact beam 5 disposed at an inner surface side of the door outer panel 3. The stiffening structure improves tensile rigidity of the door outer panel 3 by attaching a stiffening member 7 made of resin to the inner surface of the door outer panel 3. The stiffening member 7 includes vertical bone portions 9 extending in a streak shape from the impact beam 5 to the character line 3a along a curve of the door outer panel 3. The vertical bone portions 9 are arranged at a predetermined interval in a front-rear direction of the door outer panel 3, and outer surface of the vertical bone portions 9 is bonded to the inner surface of the door outer panel 3.
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