WO2002064277A1 - Manchon mince de pare-choc, a section fermee de forme generale en b, trempe apres moulage par pression - Google Patents

Manchon mince de pare-choc, a section fermee de forme generale en b, trempe apres moulage par pression Download PDF

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Publication number
WO2002064277A1
WO2002064277A1 PCT/JP2001/007046 JP0107046W WO02064277A1 WO 2002064277 A1 WO2002064277 A1 WO 2002064277A1 JP 0107046 W JP0107046 W JP 0107046W WO 02064277 A1 WO02064277 A1 WO 02064277A1
Authority
WO
WIPO (PCT)
Prior art keywords
section
cross
press
shape
bumper
Prior art date
Application number
PCT/JP2001/007046
Other languages
English (en)
Japanese (ja)
Inventor
Shoshi Ando
Youichi Hisama
Original Assignee
Futaba Industrial Co.,Ltd.
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
Application filed by Futaba Industrial Co.,Ltd. filed Critical Futaba Industrial Co.,Ltd.
Priority to JP2002564061A priority Critical patent/JPWO2002064277A1/ja
Publication of WO2002064277A1 publication Critical patent/WO2002064277A1/fr

Links

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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • 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
    • B21C37/151—Making tubes with multiple passages
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/1806—Structural beams therefor, e.g. shock-absorbing
    • B60R2019/1813—Structural beams therefor, e.g. shock-absorbing made of metal

Definitions

  • the present invention relates to a bumper rein hose used to enhance the safety of an automobile by improving the rigidity of an automobile body or absorbing energy at the time of a collision, and is roughly formed by press molding having a deep drawing process.
  • the present invention relates to providing a bumper rein hose that is lighter and more secure than conventional products by forming a B-shaped closed cross section and then quenching the bumper rein hose.
  • Bumper-line hoses have not been able to meet the demands for further weight reductions in order to improve the driving performance and fuel efficiency of cars while satisfying the functions of absorbing energy in the event of a car collision and protecting occupants.
  • An object of the present invention is to form a substantially B-shaped closed cross-section by press forming having a deep drawing process using a steel plate having a reduced thickness, and then quenching to elevate the steel plate. It is an object of the present invention to provide a pampered rein hose having a strengthened, lightweight, highly safe, substantially B-shaped closed cross section.
  • Another object of the present invention is to provide a bumper rein hose in which the strength of a central portion where a large force is applied in a frontal collision or a portion where a large force is applied in an offset collision is particularly increased. Disclosure of the invention
  • the present invention provides a step of deep drawing a steel sheet to form a hat shape at the center of the cross section, a step of trimming an external shape to remove unnecessary portions, a step of pressing a rising edge at both ends of the cross section, A step of pressing the inclined stand and a step of pressing the cross section from both sides and then pressing from above form a bumper rein hose with a substantially B-shaped closed cross section, and then quenched. It is characterized by the fact that it is an imperial hose.
  • a bumper rein hose that has been quenched over the entire length of the bumper rein hose, a bumper rein hose that has been hardened only in the center of about 40 O mm, It is characterized by a bumper re-in hose hardened only during 0 O mm, a bumper re-in hose hardened only at 80 mm in the center, and the like.
  • FIG. 1 is a right half plan view of one embodiment of the pampering hose according to the present invention.
  • FIG. 2 is a cross-sectional view of FIG.
  • FIG.3 is a view showing one embodiment of a process of deep-drawing a steel sheet to form a hat shape at the center of the cross section and pressing the hat-shaped upper surface and the hat-shaped lower surface into a curved shape in plan view.
  • FIG. 4 is a right half sectional view of the deep drawn section of FIG.
  • FIG.5 is a sectional view of a trimmed cross section after the outer trim processing.
  • FIG. 6 is a diagram showing one embodiment of a step of pressing the rising on both sides of the cross section.
  • FIG. 7 is a diagram showing one embodiment of a step of pressing an L-shaped inclined stand on both sides of the cross section.
  • FIG.8 is a view showing one embodiment of a step of pressing an L-shaped inclined stand on both sides of the cross section when the total width H is larger than the height B of the cross section.
  • FIG. 9 is a view showing one embodiment of a press working step in the invention of a press die comprising a press die partially provided with a notch and a kick force.
  • FIG. 10 is a view showing one example of a state in which press working is started from both sides of the cross section.
  • FIG. 11 is a view showing one embodiment of a process of pressing a cross section from both sides and further pressing from above.
  • the process of deep drawing a steel sheet to form a hat shape 22 in the center of the cross section is a hat shape
  • a steel plate is sandwiched between an upper mold 24 having a protrusion 5 and a lower mold 27 having a protrusion 28 having the same width b 4 as the inner width of the hat shape 22 and the same height h 2 as the height of the hat shape 22,
  • the upper mold 24 is pressed down and pressed to form a deep drawn section 20.
  • the upper surface 23 and the lower surface 19 should be curved so that the upper surface 23 and the lower surface 19 are curved.
  • the shape of the lower surface 24 a of the mold 24 and the upper surface 27 a of the lower mold 27 and the bottom surface 25 a of the groove 25 and the tip surface 28 a of the projection 28 are curved surfaces.
  • h1 and h2 are set to be smaller than the total width H by twice the thickness t.
  • the dimensions li 1 and h 2 are also changed in accordance with the dimension H which varies depending on the position in the longitudinal direction.
  • the process of pressing the riser 3 2 at both ends of the cross section consists of an upper die 3 4 having the same width b 5 as the inner width of the lower part of the riser 32 and a groove 35, and a lower riser 3 2
  • a trim section 21 is sandwiched between a lower die 37 having a groove 38 with the same width dimension b6 as the outer width of the groove and a protrusion 38 at the center of the groove 38, and the upper die 34 is pushed down. Press working to form a vertical section 3 1.
  • the angle E of the upright surface 38b of the groove 38 is an appropriate value in the range of 35 degrees to 90 degrees.
  • the angle E is 90 degrees, the upper mold 4 4 does not interfere with the inclined stand 4 2, This is because if the dimension H of the entire width becomes smaller than the dimension B of the height, the upper die 44 and the inclined stand 42 interfere with each other unless the angle E is reduced.
  • the angle E was 80 degrees at the center of the bumper rein hose 1, and the angle E was 45 degrees at the ends.
  • the lower surface 34a and the bottom surface 38a of the groove 38 are each curved.
  • the dimensions b5 and b6 are changed in accordance with the change in the dimension H of the full width. .
  • the step of pressing the L-shaped inclined standing top 42 on both sides of the cross section is performed by an upper die 44 having a groove 45 and a groove including a bottom surface 47 a and an inclined surface 47 b.
  • a rising section 31 is sandwiched between a lower mold 46 having a groove 47 having a projection 47c at the center, and the upper mold 44 is pressed down to form an L oblique section 41.
  • the angle F of the slope 47 b of the groove 47 is the pressing surface 54 of the right die 54 and the pressing surface 55 of the left die 55 when pressing starts from both sides of the section shown in FIG.
  • the lower limit of this angle varies depending on the material of the mold and steel plate, surface hardness, surface roughness, presence / absence and type of oils and fats, and must be determined experimentally.
  • the angle F was set to 60 degrees.
  • the lower surface 44a and the bottom surface 47a of the groove 47 are each curved.
  • One embodiment of the invention relating to the mold and the press working method is shown and described in FIG.
  • the notch 4 3a is provided in the upper die 43 to prevent the upper die 43 from interfering with the tip 42a of the oblique rising top 42 when pressing is performed.
  • a kicker 48 is provided to form a press die.
  • the upper die 43 does not interfere with the tip 42 a of the inclined stand 42 that is a part of the work.
  • the upper die 43 is pulled up while pushing the hat-shaped upper surface 23 as a part of the work while pushing out the tip of the kicker 48, the L oblique section 41 can be easily separated from the upper die.
  • the lower surface 56 a of the upper die 56 and the receiving surface 54 of the right die 54 and the left die 55 , 55 b are each a curved surface shape.
  • the step of fully welding the joint 52 is preferably seam welding, laser welding, plasma welding, or the like. This completes the formation of the bumper line hose 1 having a substantially B-shaped closed cross section 51.
  • induction hardening is performed in this embodiment as a quenching process.
  • a coil is formed along the outer peripheral surface of a substantially B-shaped closed cross section, and the coil is moved relatively in the longitudinal direction of the bumper rein hose while flowing a high frequency current through the coil to reduce the quenched portion.
  • water cooling is performed. Due to this quenching, the tensile strength of the material was improved to 130 O NZmm 2 .
  • the press workability that use steel tensile strength 4 4 0 ⁇ 5 9 O NZmm 2 in the present invention are well suitable. Use materials with higher tensile strength than this This is because, when the total width H at the center is large and the total width H at both ends is small, it may be difficult to press the steel sheet into a deep drawing to form a hat shape 22 at the center of the cross section.
  • the tensile strength 4 4 0 ⁇ 5 9 ON / mm 2 material with induction hardening, and that the tensile strength 1 1 8 0 ⁇ 1 4 7 ON / mm 2 after quenching is lighter Preferred for meeting demand and for economic reasons. This is because, when quenching improves the overall tensile strength of the material and obtains a bumper rein hose with the same strength, the thickness of the material can be reduced by the increased tensile strength.
  • the thickness of the steel sheet is 0.7 to 1.6 mm, but in particular, the one with a thickness of 0.9 to 1.4 mm is suitable for meeting the demand for weight reduction and for economic reasons. Are preferred.
  • the pressing direction is described as up and down or left and right.
  • the present invention is not limited to this.
  • the up and down may be reversed, or the up and down may be changed to left and right or the left and right may be changed to up and down.
  • the press mold shown in the drawings is merely an example, and is not limited to the illustrated press mold shape.
  • a press die considering springback generated after press working is used as necessary.
  • the outer surface 61 of the substantially B-shaped closed cross section 51 is set to the outside of the vehicle, and the mounting surface 65 is mounted to the vehicle body.
  • the present invention is not limited to this, and the reverse configuration is also possible. Conceivable.
  • the bumper rein hose according to the present invention uses a material in which the tensile strength is increased by quenching the steel sheet, and has a shape with a high section modulus and excellent strength. be able to. Therefore, it is a pump-in hose that satisfies the required strength and functions such as energy absorption at the time of collision, and meets the demand for weight reduction, and the industrial applicability of the present invention is high.
  • the bumper rein hose which has relatively good press workability and is made of a material and is quenched after press working to increase the strength, makes it possible to work on cross-sectional shapes that were difficult to process using conventional processing methods.
  • the degree of freedom of the product shape is increased and it is possible to easily respond to the demands of customers, and the industrial applicability of the present invention is high.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Body Structure For Vehicles (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

L"invention concerne un manchon mince de pare-choc, léger et très sûr, de section transversale fermée, généralement en forme de B, et utilisé afin d"augmenter la sécurité d"un véhicule par augmentation de la rigidité du corps du véhicule ou par absorption d"énergie lors d"une collision, caractérisé en ce qu"un traitement de durcissement lui est appliqué afin d"augmenter la résistance à la traction du matériau après sa formation selon les étapes consistant à étirer de façon importante une feuille d"acier de façon à former une forme de chapeau dans la section centrale de la feuille, à détourer l"extérieur de la feuille en excluant les portions non nécessaires, à en relever par pressage une partie aux deux extrémités de section, à incliner par pressage les deux extrémités relevées de façon à obtenir une forme en L, à presser la feuille d"acier à partir de ces deux extrémités, puis par le dessus, et enfin, à réaliser une soudure de connexion.
PCT/JP2001/007046 2001-02-14 2001-08-15 Manchon mince de pare-choc, a section fermee de forme generale en b, trempe apres moulage par pression WO2002064277A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002564061A JPWO2002064277A1 (ja) 2001-02-14 2001-08-15 プレス成形後に焼入処理した概略ｂ字形の閉断面を有するバンパーリィンホース

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JPPCT/JP01/01052 2001-02-14
PCT/JP2001/001052 WO2002064284A1 (fr) 2001-02-14 2001-02-14 Tube flexible de pare-chocs mince a profil ferme en forme globale de b realise par un procede de formage a la presse a emboutissage profond et procede de fabrication d'un tel tube

Publications (1)

Publication Number Publication Date
WO2002064277A1 true WO2002064277A1 (fr) 2002-08-22

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/JP2001/001052 WO2002064284A1 (fr) 2001-02-14 2001-02-14 Tube flexible de pare-chocs mince a profil ferme en forme globale de b realise par un procede de formage a la presse a emboutissage profond et procede de fabrication d'un tel tube
PCT/JP2001/007046 WO2002064277A1 (fr) 2001-02-14 2001-08-15 Manchon mince de pare-choc, a section fermee de forme generale en b, trempe apres moulage par pression

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/001052 WO2002064284A1 (fr) 2001-02-14 2001-02-14 Tube flexible de pare-chocs mince a profil ferme en forme globale de b realise par un procede de formage a la presse a emboutissage profond et procede de fabrication d'un tel tube

Country Status (2)

Country Link
JP (2) JPWO2002064284A1 (fr)
WO (2) WO2002064284A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2163324A1 (fr) 2008-09-01 2010-03-17 Mazda Motor Corporation Procédé de production d'élément de section métallique fermée
EP2047924A3 (fr) * 2007-10-09 2010-11-03 Outimex AG Procédé et dispositif destinés à la fabrication d'une glissière de sécurité
US10751778B2 (en) 2017-03-15 2020-08-25 Nippon Steel Corporation Method of manufacturing a quenched member and quenched member

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7250151B2 (en) 2002-08-15 2007-07-31 Velocys Methods of conducting simultaneous endothermic and exothermic reactions
US7163241B2 (en) * 2004-06-25 2007-01-16 F.Tech R&D North America Inc. Vehicle bumper beam having non-uniform cross sections
JP4828267B2 (ja) * 2006-03-15 2011-11-30 アイシン高丘株式会社 熱間プレスによる閉断面形状品の製造方法
JP5077211B2 (ja) * 2008-12-05 2012-11-21 トヨタ車体株式会社 異形コ字状部を有する成形体及びその製造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076232A (ja) * 1983-10-03 1985-04-30 Toyota Motor Corp 高強度中空スタビライザの製造方法
JPH07178462A (ja) * 1993-12-24 1995-07-18 Nippon Steel Corp 金属板の曲げ加工方法
JP2000334528A (ja) * 1999-03-19 2000-12-05 Futaba Industrial Co Ltd プレス成形による概略ｂ字形の閉断面を有するバンパーリィンホース及びその製造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02165823A (ja) * 1988-12-20 1990-06-26 Nissan Motor Co Ltd フロントフェンダのプレス成形方法
EP0870650B1 (fr) * 1997-04-10 2003-07-30 Hyundai Motor Company Dispositif et procédé permettant de fabriquer des poutres de pare-choc pour véhicules
JP2000335335A (ja) * 1999-03-19 2000-12-05 Futaba Industrial Co Ltd バンパーリィンホース並びにバンパーリィンホースの製造方法及びプレス加工型
JP2001001053A (ja) * 1999-04-22 2001-01-09 Aisin Seiki Co Ltd ロール成形品および自動車用バンパー

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076232A (ja) * 1983-10-03 1985-04-30 Toyota Motor Corp 高強度中空スタビライザの製造方法
JPH07178462A (ja) * 1993-12-24 1995-07-18 Nippon Steel Corp 金属板の曲げ加工方法
JP2000334528A (ja) * 1999-03-19 2000-12-05 Futaba Industrial Co Ltd プレス成形による概略ｂ字形の閉断面を有するバンパーリィンホース及びその製造方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2047924A3 (fr) * 2007-10-09 2010-11-03 Outimex AG Procédé et dispositif destinés à la fabrication d'une glissière de sécurité
EP2163324A1 (fr) 2008-09-01 2010-03-17 Mazda Motor Corporation Procédé de production d'élément de section métallique fermée
US8365411B2 (en) 2008-09-01 2013-02-05 Mazda Motor Corporation Method of producing metal closed-section member
US10751778B2 (en) 2017-03-15 2020-08-25 Nippon Steel Corporation Method of manufacturing a quenched member and quenched member

Also Published As

Publication number Publication date
WO2002064284A1 (fr) 2002-08-22
JPWO2002064277A1 (ja) 2004-06-10
JPWO2002064284A1 (ja) 2004-06-10

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