WO2018180556A1 - Élément structural pour véhicule et son procédé de production - Google Patents

Élément structural pour véhicule et son procédé de production Download PDF

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Publication number
WO2018180556A1
WO2018180556A1 PCT/JP2018/010291 JP2018010291W WO2018180556A1 WO 2018180556 A1 WO2018180556 A1 WO 2018180556A1 JP 2018010291 W JP2018010291 W JP 2018010291W WO 2018180556 A1 WO2018180556 A1 WO 2018180556A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
long hollow
tube portion
hollow member
longitudinal direction
Prior art date
Application number
PCT/JP2018/010291
Other languages
English (en)
Japanese (ja)
Inventor
徹 橋村
大貴 山川
康裕 前田
Original Assignee
株式会社神戸製鋼所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2017181612A external-priority patent/JP6745253B2/ja
Application filed by 株式会社神戸製鋼所 filed Critical 株式会社神戸製鋼所
Priority to EP18774666.4A priority Critical patent/EP3604087B1/fr
Priority to US16/491,894 priority patent/US11072373B2/en
Publication of WO2018180556A1 publication Critical patent/WO2018180556A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material
    • B21D39/206—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material by axially compressing the elastic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions

Definitions

  • the present invention relates to a structural member for a vehicle and a manufacturing method thereof.
  • the instrument panel reinforcement structure of Patent Document 1 is configured by connecting a large-diameter cylinder and a small-diameter cylinder as cylindrical members in the longitudinal direction.
  • the large diameter cylinder has a larger diameter than the diameter of the small diameter cylinder, and includes a reduced diameter portion at the end.
  • the small diameter part of the large diameter cylinder is joined to the small diameter cylinder by welding.
  • An object of the present invention is to provide a vehicle structural member that can reduce processing costs.
  • One aspect of the present invention includes a long hollow member having an integral structure and a support member joined to the long hollow member.
  • the long hollow member includes a first tube portion and a first tube portion.
  • a second pipe part disposed on the outside and extending along the first pipe part; and extending along the first pipe part and the second pipe part; the first pipe part and the second pipe part; And a first portion including a connecting portion that connects the first tube portion and the second tube portion to each other, and the first tube portion extending from the first portion,
  • a vehicle structural member is provided having a second portion from which a tube portion has been removed.
  • the first portion including the first tube portion and the second tube portion has higher strength and rigidity than the second portion including the first tube portion but the second tube portion removed. Further, since the first portion has an integral structure, neither welding nor diameter reduction for welding is required. For this reason, processing cost can be reduced, improving the intensity
  • the first tube portion and the second tube portion are cut by cutting the connecting portion formed of a plate-like portion interposed between the first tube portion and the second tube portion. It can prevent that an open cross section forms in a pipe part.
  • the longitudinal position of the first tube portion and the second tube portion may be aligned with one end portion of the first tube portion and one end portion of the second tube portion.
  • the cross-sectional shapes of the first tube portion and the second tube portion may be substantially constant in the longitudinal direction.
  • a method for manufacturing a structural member for a vehicle including a joining step of caulking and joining a long hollow member and the support member.
  • one of the two pipe portions is provided with a first cut extending in a direction intersecting with a longitudinal direction of the element pipe and reaching the connecting portion
  • a second notch extending in a direction intersecting the longitudinal direction of the element tube and reaching the connecting portion is provided at a position different from the position of the element tube in the longitudinal direction
  • the connecting portion is provided with a third notch that extends along the longitudinal direction of the element tube and connects the end of the first notch and the end of the second notch, and the first to third It may include separating the raw tube into the two long hollow members by cutting.
  • an elastic body that can be inserted into the long hollow member is prepared, the elastic body is inserted into the tube portion of the long hollow member, and the elastic body is inserted in the longitudinal direction of the long hollow member. And expanding the elongated hollow member in a direction perpendicular to the longitudinal direction of the elongated hollow member, thereby expanding the elongated hollow member.
  • the tube portion of the long hollow member can be expanded uniformly by the isotropic deformation of the elastic body. Therefore, local load can be reduced and local deformation can be prevented. Therefore, it is possible to join the long hollow member and the support member with high accuracy compared to other joining methods.
  • FIG. 2 is a sectional view taken along line II-II in FIG. 1.
  • wire of FIG. 1 which concerns on the 1st process of a joining method.
  • Sectional drawing similar to FIG. 5 which concerns on the 2nd process of a joining method.
  • the long hollow member 10 has a double tube portion (first portion) 10a and a single tube portion (second portion) 10b arranged in the longitudinal direction.
  • the double tube portion 10 a includes a first tube portion 11, a second tube portion 12, and a connecting portion 13.
  • the single tube portion 10b includes a first tube portion 11 extending from the double tube portion 10a, and the second tube portion 12 is removed.
  • the double tube portion 10a is a long portion on the one end portion 11a side of the first tube portion 11 and the one end portion 12a side of the second tube portion 12 with respect to the other end portion 12b of the tube portion 12.
  • the single tube portion 10 b is a portion of the long hollow member 10 on the other end portion 11 b side of the first tube portion 11 with respect to the other end portion 12 b of the second tube portion 12.
  • the first tube portion 11 has a substantially cylindrical shape whose X direction is a longitudinal direction, and has an axis C1.
  • the cross-sectional shape (the shape of the YZ cross section) of the first tube portion 11 is substantially constant over the entire length in the X direction.
  • the first tube portion 11 and the second tube portion 12 are arranged away from each other in the radial direction of the long hollow member 10 (direction orthogonal to the axes C1 and C2).
  • the inter-axis distance between the axis C1 of the first pipe part 11 and the axis C2 of the second pipe part 12 is the outer diameter (radius) of the first pipe part 11 and the second pipe part 12. It is larger than the sum of the outer diameters (radius).
  • the double tube portion 10a including the first tube portion 11 and the second tube portion 12 has higher strength and rigidity than the single tube portion 10b including the first tube portion 11 and from which the second tube portion 12 is removed. .
  • the connecting part 13 is a plate-like part whose X direction is the longitudinal direction.
  • the shape of the connecting portion 13 is different between the double tube portion 10a and the single tube portion 10b.
  • the cross-sectional shape of the connecting portion 13 (the shape of the YZ cross-section) is substantially rectangular.
  • the connecting portion 13 is disposed between the first tube portion 11 and the second tube portion 12 in the double tube portion 10 a and connects the first tube portion 11 and the second tube portion 12.
  • the connecting portion 13 is a section 13a from which a part of the connecting portion 13 is removed.
  • the section 13a is a plate-like portion that protrudes from the first tube portion 11 in the Z direction and extends in the X direction.
  • the single tube portion 10b includes a first tube portion 11 and a section 13a.
  • the bracket 21 is a support bracket 21 for supporting the long hollow member 10 and is expanded and joined to the long hollow member 10 with an interval in the X direction.
  • the long hollow member 10 is mechanically connected to a vehicle component such as a vehicle floor panel or a dash panel (not shown).
  • the bracket 22 is a steering bracket 22 for supporting a steering column 31 that serves as a rotating shaft of the steering wheel 30, and is joined to the double pipe portion 10 a of the long hollow member 10 by welding.
  • the manufacturing method of the steering support 1 according to the present embodiment includes a forming process, a cutting process, and a joining process.
  • the extruded shape member 40 includes two pipe parts 41A and 41B arranged in parallel, and a connecting part 42 that connects the pipe parts 41A and 41B.
  • the cross-sectional shape of the extruded shape member 40 (the shape of the YZ cross-section) is substantially constant over the entire length.
  • the extruded shape member 40 is an extruded material made of, for example, an aluminum alloy.
  • connection part 42 is cut
  • the extruded shape member 40 is separated into two long hollow members 50.
  • the distance between the X direction center of the third cut 45 and the end 43a of the first cut 43 is the distance between the X direction center of the third cut 45 and the end 44a of the second cut 44. Equal to the distance between. That is, the extruded shape member 40 is cut so as to be symmetrical twice with respect to the central axis C3 extending in the Y direction through the center of the third cut 45 in the X direction.
  • the long hollow member 50 connects the first tube portion 51, the second tube portion 52 extending along the first tube portion 51, and the first tube portion 51 and the second tube portion 52. Connecting portion 53 to be provided. As described above, since the extruded shape member 40 is cut twice symmetrically with respect to the central axis C3, the two long hollow members 50 have the same dimensions.
  • the long hollow member 50 and the both-end support bracket 20, the support bracket 21, and the steering bracket 22 are joined.
  • the both-end support bracket 20, the support bracket 21, and the steering bracket 22 are arranged so as to surround the long hollow member 50.
  • the long hollow member 50, the both-end support bracket 20 and the support bracket 21 are caulked and joined.
  • the long hollow member 50 and the steering bracket 22 are joined by welding.
  • a rubber (elastic body) 60 that can be inserted into the long hollow member 50 and a pusher 61 for compressing the rubber 60 are prepared.
  • the rubber 60 has a cylindrical shape extending in the longitudinal direction of the first tube portion 51.
  • the outer shape of the rubber 60 is formed to be slightly smaller than the inner shape of the first tube portion 51 to such an extent that it can be inserted into the first tube portion 51.
  • the material of the rubber 60 is preferably, for example, any of urethane rubber, chloroprene rubber, CNR rubber (chloroprene rubber + nitrile rubber), or silicon rubber.
  • the hardness of the rubber 60 is preferably 30 or more on Shore A.
  • the pusher 61 is attached to a press device or the like (not shown), and the rubber 60 can be compressed in the longitudinal direction of the rubber 60 by being driven by the press device.
  • a pressing surface 61a that is an end surface of the pressing element 61 has a flat surface perpendicular to the compression direction.
  • the support bracket 21 is disposed so as to surround the first pipe portion 51. Further, the rubber 60 is inserted into the first tube portion 51, and the pusher 61 is inserted into the first tube portion 51 from both ends of the first tube portion 51.
  • the first cut 43, the second cut 44, and the third cut 45 may be provided in any order.
  • the pipe expansion joining may be performed individually for each bracket 20, 21, or the pipe expansion joining may be performed simultaneously for the plurality of brackets 20, 21. You may go.
  • the joining of the long hollow member 50 and the both-end support bracket 20 and the support bracket 21 may be performed by other joining methods such as welding or pipe expansion joining by electromagnetic forming.
  • the joining of the long hollow member 50 and the steering bracket 22 may be performed by other joining methods such as tube expansion joining.
  • the steering support 1 and the manufacturing method of the steering support 1 according to the present embodiment have the following characteristics.
  • the double tube portion 10a has higher strength and rigidity than the single tube portion 10b.
  • the long hollow member 10 can be manufactured by cutting the extruded shape member 40, and the twin tube portion 10a and the single tube portion 10b are integrally formed. No processing is required. For this reason, the processing cost can be reduced while partially improving the strength and rigidity of the steering support 1.
  • the long hollow member 10 since the long hollow member 10 has an integral structure and does not have a joint portion, the strength and rigidity can be improved as compared with the case where a similar member is manufactured by joining a plurality of members. Furthermore, since the long hollow member 10 is not subjected to diameter reduction processing, it is easy to perform pipe expansion joining when joining to a support member such as a bracket.
  • the first pipe part 51 and the first pipe part 51 of the long hollow member 50 are cut by cutting the connecting part 42 formed of a plate-like part interposed between the two pipe parts 41. It is possible to prevent the open section from being formed in the two pipe portions 52.
  • Two long hollow members 50 having the same shape and dimensions can be manufactured at the same time by cutting the extruded shape member 40 so as to be twice symmetrical with respect to the central axis C3. For this reason, a yield can be improved and processing cost can be reduced.
  • the brackets 20 and 21 are joined to the long hollow member 10 by pipe expansion joining using the rubber 60. Due to the isotropic deformation of the rubber 60, the first tube portion 51 and the second tube portion 52 of the long hollow member 50 can be expanded uniformly. Therefore, local load on the long hollow member 50 can be reduced, and local deformation of the long hollow member 50 can be prevented. Therefore, compared with other joining methods, the long hollow member 50 and the various brackets 20 and 21 can be joined with high accuracy. Moreover, since this pipe expansion joining method can join a some bracket to the elongate hollow member 50 simultaneously, compared with another joining method, a process man-hour can be reduced and processing cost can be reduced.
  • the long hollow member 10 includes a first tube portion 11, a second tube portion 12, and a pair of connecting portions 13.
  • the cross-sectional shape (the shape of the YZ cross-section) of the first tube portion 11 is a rectangle.
  • the cross-sectional shape of the 2nd pipe part 12 is a rectangle.
  • the vehicular structural member 1 according to the present invention is not limited to the steering support 1 and can be applied to other vehicular structural members.
  • the cross-sectional shape (the shape of the YZ cross section) of the first tube portion 11 and the second tube portion 12 may be a polygon.
  • the long hollow member 10 may be an aluminum material such as pure aluminum or an aluminum alloy, or may be an iron material such as iron or high tension steel.
  • brackets 20, 21, and 22 may each be an aluminum material or an iron material.
  • the vehicle structural member 1 may be made of an aluminum material or an iron material as a whole.
  • the pipe expansion joining performed in the joining step is not limited to the pipe expansion joining using rubber, and may be pipe expansion joining using electromagnetic forming or pipe expansion joining using hydraulic pressure.

Abstract

L'invention concerne un élément structural 1 pour véhicule comprenant un élément creux allongé 10 ayant une structure d'un seul tenant ; et des éléments de support 20, 21, 22 qui sont reliés à l'élément creux allongé. L'élément creux allongé comprend : une première section 10a comprenant une première partie tubulaire 11, une seconde partie tubulaire 12 disposée à l'extérieur de la première partie tubulaire et s'étendant le long de la première partie tubulaire 11, et une partie de liaison 13 s'étendant le long de la première partie tubulaire et de la seconde partie tubulaire et faisant partie intégrante de la première partie tubulaire et de la seconde partie tubulaire afin de relier la première partie tubulaire et la seconde partie tubulaire l'une à l'autre ; et une seconde section 10b qui comprend la première partie tubulaire s'étendant depuis la première section et à partir de laquelle la seconde partie tubulaire est retirée.
PCT/JP2018/010291 2017-03-28 2018-03-15 Élément structural pour véhicule et son procédé de production WO2018180556A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18774666.4A EP3604087B1 (fr) 2017-03-28 2018-03-15 Élément structural pour véhicule et son procédé de production
US16/491,894 US11072373B2 (en) 2017-03-28 2018-03-15 Vehicle structural member and method for producing same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2017-063460 2017-03-28
JP2017063460 2017-03-28
JP2017-181612 2017-09-21
JP2017181612A JP6745253B2 (ja) 2017-03-28 2017-09-21 車両用構造部材及びその製造方法

Publications (1)

Publication Number Publication Date
WO2018180556A1 true WO2018180556A1 (fr) 2018-10-04

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Application Number Title Priority Date Filing Date
PCT/JP2018/010291 WO2018180556A1 (fr) 2017-03-28 2018-03-15 Élément structural pour véhicule et son procédé de production

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4821329B1 (fr) 1970-12-28 1973-06-28
US5868426A (en) * 1997-05-27 1999-02-09 Chrysler Corporation Cross car steering column support and method of installation
EP1655209A1 (fr) * 2004-11-05 2006-05-10 Alcan Technology & Management Ltd. Poutre de support de tableau de bord
JP2006264469A (ja) * 2005-03-23 2006-10-05 Showa Denko Kk ステアリングサポートビーム及びその製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4821329B1 (fr) 1970-12-28 1973-06-28
US5868426A (en) * 1997-05-27 1999-02-09 Chrysler Corporation Cross car steering column support and method of installation
EP1655209A1 (fr) * 2004-11-05 2006-05-10 Alcan Technology & Management Ltd. Poutre de support de tableau de bord
JP2006264469A (ja) * 2005-03-23 2006-10-05 Showa Denko Kk ステアリングサポートビーム及びその製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3604087A4 *

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