JP4299254B2

JP4299254B2 - Press forming method of frame member for vehicle

Info

Publication number: JP4299254B2
Application number: JP2005028026A
Authority: JP
Inventors: 博大山田
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2005-02-03
Filing date: 2005-02-03
Publication date: 2009-07-22
Anticipated expiration: 2025-02-03
Also published as: JP2006213186A

Description

本発明は、車両用骨格メンバ部材のプレス成形方法に関するものである。 The present invention relates to a press molding method car dual skeletal frame member.

車両用骨格メンバ部材として、断面がコ字状を呈する部材や断面がコ字状を呈する部材同士を互いに合わせた形状のものが実用に供されている。
実用の車両用骨格メンバ部材は、所定の剛性を保ちつつ所定の機能をもたすようにすれば実用上十分であった。 As a vehicle skeleton member member, a member having a shape in which a member having a U-shaped cross section and a member having a U-shaped cross section are combined with each other is provided in practical use.
A practical skeleton member for a vehicle is practically sufficient if it has a predetermined function while maintaining a predetermined rigidity.

このような車両用骨格メンバ部材として、断面をコ字状に形成するとともに所定の部材を通過させる切り欠きを形成したものが知られている（例えば、特許文献１参照。）。
実開平５−１４７７０号公報（第２頁、図１） As such a vehicle skeleton member member, a member having a U-shaped cross section and a notch through which a predetermined member passes is known (for example, see Patent Document 1).
Japanese Utility Model Laid-Open No. 5-14770 (2nd page, FIG. 1)

図１５は従来の基本構成を説明する図であり、車両用骨格メンバ部材２４０は、具体的にはサイドフレーム２４１に直交させたクロスメンバであって、断面がコ字状を呈し、コ字状の底部２４２に配管（若しくは配材）２４５を貫通させる切り欠き２４３若しくは貫通孔２４４を設けたものである。 FIG. 15 is a diagram for explaining a conventional basic configuration, and the vehicle skeleton member 240 is specifically a cross member orthogonal to the side frame 241 and has a U-shaped cross section. A notch 243 or a through-hole 244 through which the pipe (or distribution material) 245 penetrates is provided in the bottom portion 242.

しかし、車両用骨格メンバ部材２４０では、底部２４２に配管を貫通させる切り欠き２４３若しくは貫通孔２４４を設けたものなので、切り欠き２４３や貫通孔２４４に応力が集中し、骨格メンバ部材の剛性が落ちるという問題があった。
また、車両用骨格メンバ部材２４０では、中央部が両端部に同一の断面形状と考えられ、例えば中央部の下面に配管２４５などを通そうとする場合には高さ方向の寸法が嵩むという欠点がある。 However, in the vehicle skeleton member 240, since the notch 243 or the through hole 244 through which the pipe passes is provided in the bottom portion 242, stress concentrates on the notch 243 or the through hole 244, and the rigidity of the skeleton member member is lowered. There was a problem.
Further, in the vehicle skeleton member 240, the central portion is considered to have the same cross-sectional shape at both ends, and for example, when trying to pass the pipe 245 or the like through the lower surface of the central portion, the height dimension is increased. There is.

すなわち、応力の分散を図り剛性を向上できるとともに、例えば、車両用骨格メンバ部材を横切る配管などを配置するときに全体として高さ方向の寸法の増加を最小限に止めることができる車両用骨格メンバ部材が望まれる。 That is, it is possible to improve the rigidity by distributing the stress and, for example, the vehicle skeletal member that can minimize the increase in the dimension in the height direction as a whole when arranging piping crossing the skeleton member member for the vehicle, for example. A member is desired.

本発明は、部分的に応力が集中する点を解決し、応力の分散を図り剛性を向上できる車両用骨格メンバ部材のプレス成形方法を提供するとともに、例えば、車両用骨格メンバ部材に直交する配管などを配置するときに高さ方向の寸法が嵩む点を解決し、全体として高さ方向の寸法の増加を最小限に止めることができる車両用骨格メンバ部材のプレス成形方法を提供することを課題とする。 The present invention solves the point where concentrated partially stress, as well as provide a press-forming method of the vehicle dual skeletal member element that can improve the rigidity achieving dispersion of stress, for example, perpendicular to the skeletal frame member for vehicles the dimensions of the height direction is the solution to that increase, to provide a press-forming method of the vehicle dual skeletal member member that can be minimized to increase the height dimension as a whole can when placing the pipe, etc. Is an issue.

請求項１に係る車両用骨格メンバ部材のプレス成形方法の発明は、矩形板材の相対する両辺を互いに対称な凹状にカットする工程と、アーチ状の底部に両辺に沿わせる補強ビードを形成する工程と、押込みプレス成形で両辺を直線状に形成するとともに両辺を繋ぐ底部をアーチ状に成形する工程と、からなり、底部の両端部を除く中心部のみに、アーチ状の底部の両辺に沿わせた補強ビードを形成することを特徴とする。 Invention of the press molding method for a vehicle skeleton member member according to claim 1 forms a step of cutting the opposing sides of the rectangular plate material symmetric concavely each other, the reinforcing bead Ru and along both sides in an arch shaped bottom a step, a step of molding a bottom portion connecting both sides in an arch shape so as to form a straight line both sides with push press molding, Tona is, only the central portion except for the both end portions of the bottom, both sides of the arcuate bottom It characterized that you form along reinforcing beads were.

例えば、車両用骨格メンバ部材の応力の分散を図ることができるとすれば、車両用骨格メンバ部材の剛性を向上できるので好ましいことである。また、車両用骨格メンバ部材に直交する配管などを配置するときに高さ方向の寸法の増加を最小限に止めることができるとすれば、例えば、車両の低床化などを図ることができるので好都合である。 For example, if it is possible to achieve the distribution of the stress of the vehicle skeleton member, it is preferable because the rigidity of the vehicle skeleton member can be improved. Moreover, if the increase in the dimension in the height direction can be minimized when piping or the like orthogonal to the vehicle skeleton member member is disposed, for example, the vehicle floor can be lowered. Convenient.

そこで、押込みプレス成形で両辺を直線状に形成するとともに両辺を繋ぐ底部をアーチ状に成形する工程を設けることで、部分的に応力が集中することを回避することができる。
また、押込みプレス成形で両辺を直線状に形成するとともに両辺を繋ぐ底部をアーチ状に成形する工程を設けることで、例えば、車両用骨格メンバ部材に直交する配管などを配置するときに、アーチ状の底部を利用することができる。 Therefore, it is possible to avoid stress concentration partially by providing a step of forming both sides in a straight line by indentation press molding and forming a bottom portion connecting both sides in an arch shape.
In addition, by forming the both sides in a straight line by indentation press molding and forming the bottom part connecting both sides in an arch shape, for example, when arranging a pipe orthogonal to the vehicle skeleton member member, the arch shape The bottom of the can be used.

さらに、アーチ状の底部に両辺に沿わせる補強ビードを形成する工程を設け、底部の両端部を除く中心部のみに、アーチ状の底部の両辺に沿わせた補強ビードを形成することで、材料の有効利用をすることができる。
アーチ状の底部に両辺に沿わせる補強ビードを形成する工程を設け、底部の両端部を除く中心部のみに、アーチ状の底部の両辺に沿わせた補強ビードを形成することで、成形しわを抑えることができる。 Further, the step of forming a reinforcing bead Ru and along both sides in an arch-shaped bottom portion is provided only in the central portion excluding both end portions of the bottom, in Rukoto to form a reinforcing bead and along both sides of the arcuate bottom The material can be used effectively.
A step of forming a reinforcing bead Ru and along both sides in an arch-shaped bottom portion is provided only in the central portion excluding both end portions of the bottom, in Rukoto to form a reinforcing bead and along both sides of the arch-shaped bottom portion, molding Can suppress wrinkles.

請求項１に係る発明では、押込みプレス成形で両辺を直線状に形成するとともに両辺を繋ぐ底部をアーチ状に成形する工程を設けたので、部分的に応力が集中することを回避することができる。この結果、車両用骨格メンバ部材の剛性の向上を図ることができるという利点がある。
また、押込みプレス成形で両辺を直線状に形成するとともに両辺を繋ぐ底部をアーチ状に成形する工程を設けたので、例えば、車両用骨格メンバ部材に直交する配管などを配置するときに、アーチ状の底部を利用することができる。この結果、車両の高さ方向の寸法の増加を最小限に止めることができる。 In the invention according to claim 1, since the bottom portion connecting both sides to form the sides in a straight line in the pushing press molding digits set the step of forming the arcuate, is possible to avoid the partial stress concentration it can. As a result, there is an advantage that the rigidity of the vehicle skeleton member can be improved.
In addition, since there is a step of forming both sides in a straight line by indentation press molding and forming a bottom part connecting both sides in an arch shape, for example, when arranging a pipe orthogonal to the vehicle skeleton member member, an arch shape The bottom of the can be used. As a result, an increase in the height dimension of the vehicle can be minimized.

さらに、アーチ状の底部に両辺に沿わせる補強ビードを形成する工程を設け、底部の両端部を除く中心部のみに、アーチ状の底部の両辺に沿わせた補強ビードを形成したので、材料の有効利用をすることができる。
アーチ状の底部に両辺に沿わせる補強ビードを形成する工程を設け、底部の両端部を除く中心部のみに、アーチ状の底部の両辺に沿わせた補強ビードを形成したので、成形しわを抑えることができる。この結果、車両用骨格メンバ部材の品質の向上を図ることができるという利点がある。 Further, the step of forming a reinforcing bead Ru and along both sides in an arch-shaped bottom portion is provided only in the central portion excluding both end portions of the bottom, so to form a reinforcing bead and along both sides of the arch-shaped bottom, The material can be used effectively.
A step of forming a reinforcing bead Ru and along both sides in an arch-shaped bottom portion is provided only in the central portion excluding both end portions of the bottom, so to form a reinforcing bead and along both sides of the arch-shaped bottom, I shaped Can be suppressed. As a result, there is an advantage that the quality of the frame member for a vehicle can be improved.

本発明を実施するための最良の形態を添付図に基づいて以下に説明する。なお、図面は符号の向きに見るものとする。
図１は本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材を採用した車両の斜視図であり、１０は車両、１２は車体フレーム、１３は車室、１４はフロントバンパ、１５はフロントフェンダ、１６は前輪、１７は後輪、１８は前ドア、１９は後ドア、２１はテールゲート、２２はリヤバンパ、２３はボンネット、２４はルーフである。
車両用骨格メンバ部材は、後述するように、底部をアーチ状に形成し、底部８１に側面に沿わせた補強ビードを形成した部材である。 The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a perspective view of a vehicle employing a vehicle skeleton member member formed by a press molding method for a vehicle skeleton member member according to the present invention, wherein 10 is a vehicle, 12 is a vehicle body frame, 13 is a vehicle compartment, 14 is a vehicle body frame. Is a front bumper, 15 is a front fender, 16 is a front wheel, 17 is a rear wheel, 18 is a front door, 19 is a rear door, 21 is a tailgate, 22 is a rear bumper, 23 is a hood, and 24 is a roof.
As will be described later, the vehicle skeleton member member is a member in which a bottom portion is formed in an arch shape and a reinforcing bead is formed on the bottom portion 81 along the side surface.

図２は本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材を採用した車両のフロア構造の斜視図であり、車両のフロア構造３０は、車体フレーム１２と、この車体フレーム１２に取付けたフロアパネル３１と、このフロアパネル３１の前部に設けたダッシュボード３２と、から構成する。 FIG. 2 is a perspective view of a vehicle floor structure employing a vehicle skeleton member member formed by the vehicle frame member member press molding method according to the present invention. The vehicle floor structure 30 includes a vehicle body frame 12, A floor panel 31 attached to the vehicle body frame 12 and a dashboard 32 provided at the front portion of the floor panel 31 are configured.

フロアパネル３１は、車体フレーム１２の上に略平坦に取付けた部材である。
ダッシュボード（ダッシュパネル）３２は、エンジンルーム３３と車室１３（図１参照）を仕切る隔壁とともに、フロアパネル３１に連続的に形成した部材である。図中、３４はパワープラント（不図示）を支持するフロントサブフレーム、３８はフットレスト近傍を示す。 The floor panel 31 is a member that is mounted substantially flat on the vehicle body frame 12.
The dashboard (dash panel) 32 is a member formed continuously on the floor panel 31 together with a partition wall that partitions the engine room 33 and the vehicle compartment 13 (see FIG. 1). In the figure, 34 is a front subframe that supports a power plant (not shown), and 38 is the vicinity of the footrest.

図３は本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材を採用した車体フレームの平面図であり、車体フレーム１２は、左右のフロントサイドフレーム４１，４１と、これらのフロントサイドフレーム４１，４１にそれぞれ車体後方へ延ばした左右のサイドフレーム（フロアフレーム）４２Ｌ，４２Ｒと、これらのサイドフレーム４２Ｌ，４２Ｒから車体後方へ延ばした左右のリヤフレーム（不図示）と、左右のサイドフレーム４２Ｌ，４２Ｒの前部を繋ぐ第１クロスメンバ４４と、左右のサイドフレーム４２Ｌ，４２Ｒの中間を繋ぐ車両用骨格メンバ部材としての第２クロスメンバ４５と、左右のサイドフレーム４２Ｌ，４２Ｒの後部を繋ぐ第３クロスメンバ４６と、左右のサイドフレーム４２Ｌ，４２Ｒの第１クロスメンバ４４の接続位置から外方にそれぞれ延ばした左右の第１アウトリガ（張出し部材）４７，４７と、左右のサイドフレーム４２Ｌ，４２Ｒの第２クロスメンバ４５の接続位置から外方にそれぞれ延ばした左右の第２アウトリガ（張出し部材）４８，４８と、左右のサイドフレーム４２Ｌ，４２Ｒの第３クロスメンバ４６接続位置から外方にそれぞれ延ばした左右の第３アウトリガ（張出し部材）４９，４９と、左の第１〜第３アウトリガ４７〜４９の先端に接続した左のサイドシル５１Ｌと、右の第１〜第３アウトリガ４７〜４９の先端に接続した右のサイドシル５１Ｌと、第３クロスメンバ４６の後方にて左右のサイドフレーム４２Ｌ，４２Ｒを繋ぐ横連結部材（サイドフレーム連結部材）５３と、からなる。 FIG. 3 is a plan view of a vehicle body frame employing a vehicle frame member member formed by the vehicle frame member member press molding method according to the present invention. The vehicle body frame 12 includes left and right front side frames 41, 41 and Left and right side frames (floor frames) 42L and 42R extending to the rear of the vehicle body on the front side frames 41 and 41, respectively, and left and right rear frames (not shown) extending from the side frames 42L and 42R to the rear of the vehicle body A first cross member 44 that connects the front portions of the left and right side frames 42L and 42R, a second cross member 45 as a vehicle skeleton member that connects the middle of the left and right side frames 42L and 42R, and the left and right side frames A third cross member 46 connecting the rear portions of 42L and 42R, and left and right side frames 42L, The left and right first outriggers (extension members) 47 and 47 extending outward from the connection position of the 2R first cross member 44 and the connection positions of the second cross members 45 of the left and right side frames 42L and 42R are outward. Left and right second outriggers (extension members) 48 and 48, and left and right third outriggers (extension members) 49 extending outward from the connection positions of the third cross members 46 of the left and right side frames 42L and 42R, respectively. 49, a left side sill 51L connected to the tip of the left first to third outriggers 47 to 49, a right side sill 51L connected to the tip of the right first to third outriggers 47 to 49, and a third And a lateral coupling member (side frame coupling member) 53 that connects the left and right side frames 42L and 42R behind the cross member 46.

サイドフレーム４２Ｌ，４２Ｒは、互いに車体後方に向けて平面視にて幅広がりの略ハ字状に形成し、この略ハ字状に形成した拡幅部６２を備える。なお、３９Ｌ，３９Ｒはサイドフレーム４２Ｌ，４２Ｒのそれぞれの底面を示す。 The side frames 42L and 42R are formed in a substantially C shape that is widened in plan view toward the rear of the vehicle body, and includes a widened portion 62 that is formed in the substantially C shape. Note that 39L and 39R indicate the bottom surfaces of the side frames 42L and 42R, respectively.

図４は本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材を採用した車体フレームの斜視図であり、第１クロスメンバ４４は、上方を開口させた略コ字断面状のメンバであって、底部７１と、この底部７１から両側を立ち上げた側壁部７２ａ，７２ｂと、からなるメンバであって、底部７１は、中心部７１ａのコ字断面の深さを両端部７１ｂ，７１ｂのコ字断面の深さよりも浅く形成したアーチ状を呈する。なお、第２クロスメンバ４５は、図５にて詳細に説明する。 FIG. 4 is a perspective view of a vehicle body frame that employs a vehicle frame member member formed by the vehicle frame member member press molding method according to the present invention. The first cross member 44 has a substantially rectangular shape with an upper opening. A member having a U-shaped cross section, which is a member comprising a bottom portion 71 and side wall portions 72a and 72b raised from both sides of the bottom portion 71. The bottom portion 71 is a depth of the U-shaped cross section of the central portion 71a. The arch shape is formed shallower than the depth of the U-shaped cross section of both end portions 71b and 71b. The second cross member 45 will be described in detail with reference to FIG.

第３クロスメンバ４６は、上方を開口させた略コ字断面状のメンバであって、底部７３と、この底部７３から両側を立ち上げた側壁部７４，７４と、からなるメンバであって、底部７３は、中心部７３ａのコ字断面の深さを両端部７３ｂ，７３ｂのコ字断面の深さよりも浅く形成したアーチ状を呈し、底部７３に、側壁部７４，７４に沿わせた図３に示した補強ビード７５・・・（・・・は複数個を示す。以下同じ）を形成したものである。 The third cross member 46 is a member having a substantially U-shaped cross-section with an upper opening, and includes a bottom portion 73 and side wall portions 74 and 74 raised from both sides of the bottom portion 73. The bottom 73 has an arch shape in which the depth of the U-shaped cross section of the central portion 73a is shallower than the depth of the U-shaped cross sections of both end portions 73b, 73b, and the bottom 73 is along the side walls 74, 74. The reinforcing beads 75 shown in FIG. 3 are formed (... indicates a plurality, the same applies hereinafter).

横連結部材５３は、上方を開口させた略コ字断面状のメンバであって、底部７７（図３参照）と、この底部７７から両側を立ち上げた側壁部７８，７８と、からなるメンバである。図中、３５は燃料タンクを示す。 The lateral connection member 53 is a member having an approximately U-shaped cross section with an upper opening, and a member including a bottom portion 77 (see FIG. 3) and side wall portions 78 and 78 raised from the bottom portion 77 on both sides. It is. In the figure, reference numeral 35 denotes a fuel tank.

図５は本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材の斜視図であり、第２クロスメンバ４５を示す。
第２クロスメンバ（車両用骨格メンバ部材）４５は、上方を開口させた略コ字断面状のメンバであって、底部８１と、この底部８１から両側を立ち上げた側壁部８２，８２と、これらの側壁部８２，８２から外方に形成した前後のフランジ８３，８３と、側壁部８２，８２の左右端を曲げたサイドフランジ８４・・・と、側壁部８２，８２に沿わせて底部８１に形成した複数の補強ビード８５・・・と、底部８１の左右から延ばすことでそれぞれサイドフレーム４２Ｌ，４２Ｒ（図３参照）に取付ける左右の取付部８６，８６と、からなる。 FIG. 5 is a perspective view of a vehicle frame member member formed by the vehicle frame member member press molding method according to the present invention, and shows a second cross member 45.
The second cross member (vehicle frame member member) 45 is a substantially U-shaped cross-sectional member that opens upward, and includes a bottom portion 81 and side wall portions 82 and 82 raised from the bottom portion 81 on both sides. Front and rear flanges 83, 83 formed outward from the side walls 82, 82, side flanges 84... Bent at the left and right ends of the side walls 82, 82, and bottom portions along the side walls 82, 82. A plurality of reinforcing beads 85... Formed on 81 and left and right attachment portions 86 and 86 attached to the side frames 42L and 42R (see FIG. 3) by extending from the left and right of the bottom portion 81, respectively.

底部８１は、中心部８１ａのコ字断面の深さを両端部８１ｂ，８１ｂのコ字断面の深さよりも浅く形成したアーチ状を呈する。 The bottom portion 81 has an arch shape in which the depth of the U-shaped cross section of the center portion 81a is shallower than the depth of the U-shaped cross sections of both end portions 81b and 81b.

図６は本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材の正面図であり、第２クロスメンバ４５を示す。すなわち、第２クロスメンバ（車両用骨格メンバ部材）は、基部となる底部８１と、この底部８１から両側を立ち上げた側壁部８２，８２（一方の８２は不図示）と、を備えた断面視コ字状の車両用骨格メンバ部材において、底部８１が、中心部８１ａのコ字断面の深さを両端部８１ｂ，８１ｂのコ字断面の深さよりも浅く形成したアーチ状を呈し、底部８１に、側壁部８２，８２に沿わせた補強ビード８５・・・を形成したものと言える。 FIG. 6 is a front view of a vehicle frame member member formed by the vehicle frame member member press molding method according to the present invention, and shows a second cross member 45. That is, the second cross member (vehicle frame member) is a cross section provided with a bottom portion 81 serving as a base portion and side wall portions 82 and 82 (one 82 is not shown) raised from the bottom portion 81 on both sides. In the U-shaped frame member for a vehicle, the bottom 81 has an arch shape in which the depth of the U-shaped cross section of the center portion 81a is shallower than the depth of the U-shaped cross sections of both end portions 81b, 81b. Furthermore, it can be said that the reinforcing beads 85... Are formed along the side walls 82, 82.

図７は本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材の平面図であり、第２クロスメンバ４５を示す。
第２クロスメンバ（車両用骨格メンバ部材）４５は、底部８１を、中心部８１ａのコ字断面の深さを両端部８１ｂ，８１ｂのコ字断面の深さよりも浅く形成したアーチ状に形成することで、部分的に応力が集中することを回避することができる。この結果、第２クロスメンバ４５の剛性の向上を図ることができる。
また、底部８１を、中心部８１ａのコ字断面の深さを両端部８１ｂ，８１ｂのコ字断面の深さよりも浅く形成したアーチ状に形成することで、例えば、第２クロスメンバ４５に直交する配管などを配置するときに、アーチ状の底部８１を利用することができる。この結果、車両１０（図１参照）の高さ方向の寸法の増加を最小限に止めることができる。 FIG. 7 is a plan view of a vehicle skeleton member formed by the vehicle frame member member press molding method according to the present invention, and shows a second cross member 45.
The second cross member (vehicle frame member member) 45 has a bottom 81 formed in an arch shape in which the depth of the U-shaped cross section of the center portion 81a is shallower than the depth of the U-shaped cross sections of both end portions 81b and 81b. Thus, it is possible to avoid stress concentration partially. As a result, the rigidity of the second cross member 45 can be improved.
Further, the bottom 81 is formed in an arch shape in which the depth of the U-shaped cross section of the central portion 81a is shallower than the depth of the U-shaped cross sections of both end portions 81b and 81b, so that, for example, orthogonal to the second cross member 45 The arch-shaped bottom portion 81 can be used when arranging piping or the like to be performed. As a result, the increase in the dimension in the height direction of the vehicle 10 (see FIG. 1) can be minimized.

さらに、底部８１に、側壁部８２，８２に沿わせた補強ビード８５・・・を形成することで、第２クロスメンバ４５の剛性の向上を図ることができる。この結果、剛性の高い車体フレーム１２（図２参照）などの実現を図ることができる。 Furthermore, the rigidity of the 2nd cross member 45 can be aimed at by forming the reinforcement bead 85 ... along the side wall parts 82 and 82 in the bottom part 81. FIG. As a result, a highly rigid body frame 12 (see FIG. 2) and the like can be realized.

図８は図２の８−８線断面図であり、車体右側部の縦断面を示す。図９は図２の９−９線断面図であり、車体中心の縦断面を示す。
図８において、第１〜第３のクロスメンバ４４〜４６の略コ字断面状の車体右側部での深さは、ほぼサイドフレーム４２Ｒの深さと同一に形成したことを示す。また、図９において、第１〜第３のクロスメンバ４４〜４６の略コ字断面状の車体中心部での深さは、ほぼサイドフレーム４２Ｒの深さよりも浅く形成したことを示す 8 is a cross-sectional view taken along line 8-8 in FIG. 2, and shows a vertical cross section of the right side portion of the vehicle body. 9 is a cross-sectional view taken along line 9-9 of FIG. 2, and shows a vertical cross section at the center of the vehicle body.
In FIG. 8, the depth of the first to third cross members 44 to 46 at the right side of the vehicle body having a substantially U-shaped cross section is substantially the same as the depth of the side frame 42 </ b> R. 9 shows that the depth of the first to third cross members 44 to 46 at the vehicle body center portion having a substantially U-shaped cross section is formed to be shallower than the depth of the side frame 42R.

図８において、横連結部材５３の略コ字断面状の車体右側部での深さは、ほぼサイドフレーム４２Ｒの深さより浅く形成したことを示す。また、図９において、横連結部材５３の略コ字断面状の車体中心部での深さは、図８に示す車体右側部での深さにほぼ同一であることを示す。 8 shows that the depth of the lateral connection member 53 at the right side of the vehicle body having a substantially U-shaped cross section is formed to be shallower than the depth of the side frame 42R. Further, in FIG. 9, the depth of the lateral coupling member 53 at the vehicle body center portion having a substantially U-shaped cross section is substantially the same as the depth at the vehicle body right side portion shown in FIG. 8.

図１０は図２の１０−１０断面図であり、車両のフロア構造３０は、車体前後方向に左右一対のサイドフレーム４２Ｌ，４２Ｒを延ばし、これらのサイドフレーム４２Ｌ，４２Ｒを車体幅方向に設ける第２クロスメンバ（クロスメンバ）４５で連結し、これらのクロスメンバ４５及びサイドフレーム４２Ｌ，４２Ｒにフロアパネル３１を被せる車両のフロア構造において、クロスメンバ４５を、断面視で上方開口させたコ字状断面に形成するとともに、クロスメンバ４５の底部８１を、中心部８１ａのコ字断面の深さを両端部８１ｂ，８１ｂのコ字断面の深さよりも浅いアーチ状に形成し、コ字状断面の底部８１から車幅方向に左右の取付部８６，８６を延出し、これらの取付部８６，８６をそれぞれ左右のサイドフレーム４２Ｌ，４２Ｒの底面３９Ｌ，３９Ｒに連結したものと言える。 FIG. 10 is a cross-sectional view taken along the line 10-10 in FIG. 2. The vehicle floor structure 30 includes a pair of left and right side frames 42L and 42R extending in the longitudinal direction of the vehicle body, and the side frames 42L and 42R provided in the vehicle body width direction. 2 In a vehicle floor structure that is connected by cross members (cross members) 45 and covers the cross members 45 and the side frames 42L and 42R with the floor panel 31, the cross members 45 are opened upward in a cross-sectional view. The cross section 45 is formed in a cross section, and the bottom 81 of the cross member 45 is formed in an arch shape in which the depth of the U-shaped cross section of the central portion 81a is shallower than the depth of the U-shaped cross sections of both end portions 81b, 81b. The left and right attachment portions 86, 86 extend from the bottom 81 in the vehicle width direction, and these attachment portions 86, 86 are respectively connected to the left and right side frames 42L, 42R. Surface 39L, it can be said that has been linked to the 39R.

例えば、車室空間を十分に確保することができるとすれば、車室内の利便性の向上を図ることができるので好ましいことであり、クロスメンバの剛性を十分に高めるとすれば、フロアパネルの低床化の促進を図ることができるので好都合せある。 For example, if it is possible to sufficiently secure the vehicle interior space, it is preferable because the convenience of the vehicle interior can be improved. If the rigidity of the cross member is sufficiently increased, the floor panel This is advantageous because it can promote lower flooring.

そこで、クロスメンバ４５を、断面視で上方開口させたコ字状断面に形成するとともに、クロスメンバ４５の底部８１を、中心部８１ａのコ字断面の深さを両端部８１ｂ，８１ｂのコ字断面の深さよりも浅いアーチ状に形成し、コ字状断面の底部８１から車幅方向に左右の取付部８６，８６を延出し、これらの取付部８６，８６をそれぞれ左右のサイドフレーム４２Ｌ，４２Ｒの底面３９Ｌ，３９Ｒに連結することで、クロスメンバ４５の剛性を十分に高めることができる。この結果、クロスメンバ４５を軽量にすることができ、車体重量を軽くすることができる。 Therefore, the cross member 45 is formed in a U-shaped cross section that is opened upward in a cross-sectional view, and the bottom 81 of the cross member 45 is formed so that the depth of the U-shaped cross section of the center portion 81a is the U-shape of both end portions 81b and 81b. The left and right mounting portions 86, 86 are formed in the vehicle width direction from the bottom 81 of the U-shaped cross section, and the mounting portions 86, 86 are respectively connected to the left and right side frames 42L, 42L. By connecting to the bottom surfaces 39L and 39R of 42R, the rigidity of the cross member 45 can be sufficiently increased. As a result, the cross member 45 can be reduced in weight, and the vehicle body weight can be reduced.

図１１は本発明に係る車両用骨格メンバ部材のプレス成形方法のフロー図である。なお、ＳＴ××はステップ番号を示す。
ＳＴ０１：カット工程
矩形板材の相対する両辺を互いに対称な凹状にカットする。
ＳＴ０２：補強ビード形成工程
アーチ状の底部に両辺に沿わせた補強ビードを形成する。
ＳＴ０３：押込みプレス成形工程
押込みプレス成形で両辺を直線状に形成するとともに両辺を繋ぐ底部をアーチ状に成形する。 FIG. 11 is a flowchart of the press molding method for the vehicle skeleton member according to the present invention. STXX indicates a step number.
ST01: Cutting step Both opposing sides of the rectangular plate material are cut into concave shapes that are symmetrical to each other.
ST02: Reinforcing bead forming step Reinforcing beads are formed along both sides at the bottom of the arch.
ST03: Indentation press molding process Both sides are formed in a straight line by indentation press molding, and the bottom portion connecting both sides is formed in an arch shape.

車両用骨格メンバ部材のプレス成形方法では、押込みプレス成形で両辺を直線状に形成するとともに両辺を繋ぐ底部をアーチ状に成形する工程を設たので、部分的に応力が集中することを回避することができる。この結果、車両用骨格メンバ部材の剛性の向上を図ることができる。
また、車両用骨格メンバ部材のプレス成形方法では、押込みプレス成形で両辺を直線状に形成するとともに両辺を繋ぐ底部をアーチ状に成形する工程を設けたので、例えば、車両用骨格メンバ部材に直交する配管などを配置するときに、アーチ状の底部を利用することができる。この結果、車両の高さ方向の寸法の増加を最小限に止めることができる。 In the press forming method of the skeletal member for a vehicle, a process of forming both sides in a straight line by indentation press forming and forming a bottom part connecting both sides into an arch shape is provided, so that stress is not partially concentrated. be able to. As a result, the rigidity of the vehicle skeleton member can be improved.
Further, in the press forming method of the vehicle skeleton member member, a process of forming both sides in a straight line by indentation press molding and forming a bottom portion connecting both sides into an arch shape is provided, for example, orthogonal to the vehicle skeleton member member. An arch-shaped bottom can be used when placing piping or the like. As a result, an increase in the height dimension of the vehicle can be minimized.

さらに、車両用骨格メンバ部材のプレス成形方法では、アーチ状の底部に両辺に沿わせた補強ビードを形成する工程を設けたので、材料の有効利用をすることができる。
車両用骨格メンバ部材のプレス成形方法では、アーチ状の底部に両辺に沿わせた補強ビードを形成する工程を設けたので、成形しわを抑えることができる。この結果、車両用骨格メンバ部材の品質の向上を図ることができる。 Furthermore, in the press molding method of the skeleton member for a vehicle, the step of forming the reinforcing beads along both sides is provided at the bottom of the arch shape, so that the material can be effectively used.
In the press molding method of the skeleton member for a vehicle, since the step of forming the reinforcing beads along both sides is provided on the arch-shaped bottom portion, molding wrinkles can be suppressed. As a result, the quality of the vehicle skeleton member can be improved.

図１２は本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材の比較説明図であり、（ａ）は比較例の車両用骨格メンバ部材（クロスメンバ）１５０を示し、（ｂ）は実施例の車両用骨格メンバ部材（第２クロスメンバ）４５を示す。
（ａ）において、車両用骨格メンバ部材１５０は、底部１５１と、この底部１５１から両側を立ち上げた側壁部１５２，１５２と、これらの側壁部１５２，１５２から外方に形成した前後のフランジ１５３，１５３と、を備えたメンバである。 FIG. 12 is a comparative explanatory view of a vehicle frame member member formed by the vehicle frame member member press forming method according to the present invention. FIG. 12 (a) shows a vehicle frame member member (cross member) 150 of a comparative example. (B) shows the vehicle frame member member (second cross member) 45 of the embodiment.
In (a), the vehicle skeleton member 150 includes a bottom portion 151, side wall portions 152, 152 raised from the bottom portion 151 on both sides, and front and rear flanges 153 formed outward from the side wall portions 152, 152. , 153.

（ｂ）において、車両用骨格メンバ部材４５は、底部８１と、この底部８１から両側を立ち上げた側壁部８２，８２と、これらの側壁部８２，８２から外方に形成した前後のフランジ８３，８３と、側壁部８２，８２に沿わせ底部８１形成した補強ビード８５・・・と、を備えたメンバである。 In (b), the vehicle skeleton member 45 includes a bottom portion 81, side wall portions 82 and 82 raised from the bottom portion 81, and front and rear flanges 83 formed outward from the side wall portions 82 and 82. , 83 and reinforcing beads 85... Formed along the side walls 82, 82 along the bottom 81.

図１３（ａ）〜（ｄ）は本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材の断面形状を示す比較説明図であり、（ａ），（ｂ）は比較例の車両用骨格メンバ部材（クロスメンバ）１５０を示し、（ｂ）は実施例の車両用骨格メンバ部材（第２クロスメンバ）４５を示す。
（ａ）は図１２（ａ）のａ−ａ断面図であり、車両用骨格メンバ部材（クロスメンバ）１５０は、底部１５１の中心部１５１ａは深さを浅く形成しするとともに、底部１５１をフラット面に形成したものである。また、（ｂ）は図１２（ｂ）のｂ−ｂ断面図であり、車両用骨格メンバ部材１５０は、底部１５１の両端部１５１ｂは深さを深く形成したものである。 FIGS. 13A to 13D are comparative explanatory views showing a cross-sectional shape of a vehicle skeleton member member formed by the vehicle frame member member press forming method according to the present invention, and FIGS. Shows a vehicle frame member member (cross member) 150 of the comparative example, and (b) shows a vehicle frame member member (second cross member) 45 of the example.
FIG. 12A is a cross-sectional view taken along the line aa of FIG. 12A, and the vehicle frame member member (cross member) 150 is formed such that the center portion 151a of the bottom portion 151 has a shallow depth and the bottom portion 151 is flat. It is formed on the surface. 12B is a cross-sectional view taken along the line bb of FIG. 12B, and the vehicle skeleton member 150 is configured such that both end portions 151b of the bottom portion 151 are deeply formed.

（ｃ）は図１２（ｃ）のｃ−ｃ断面図であり、車両用骨格メンバ部材（第２クロスメンバ）４５は、底部８１の中心部８１ａは深さを浅く形成するとともに補強ビード８５・・・を形成したものである。また、（ｄ）は図１２（ｄ）のｄ−ｄ断面図であり、車両用骨格メンバ部材４５は、底部８１の両端部８１ｂは深さを深く形成した（車両用骨格メンバ部材１５０同様に形成した）ものである。 (C) is a c-c cross sectional views of FIG. 12 (c), the skeletal frame member for a vehicle (second cross member) 45, Rutotomoni reinforcing bead 85 central portion 81a of the bottom portion 81 forming shallow form depth Is formed. 12D is a cross-sectional view taken along the line dd of FIG. 12D, and the vehicle skeleton member 45 is formed such that both end portions 81b of the bottom 81 are deep (like the vehicle skeleton member 150). Formed).

（ａ）〜（ｄ）において、車両用骨格メンバ部材４５は、底部８１に補強ビード８５・・・を形成したので車両用骨格メンバ部材１５０よりも剛性を向上させることができたメンバであると言える。 In (a) to (d), the vehicle skeleton member 45 is a member whose rigidity can be improved more than the vehicle skeleton member 150 because the reinforcing bead 85... I can say that.

図１４（ａ），（ｂ）は本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材の展開形状を示す比較説明図であり、（ａ）は比較例の車両用骨格メンバ部材１５０（図１２参照）の展開図を示し、（ｂ）は実施例の車両用骨格メンバ部材４５（図１２参照）の展開図を示す。
（ａ）に示す車両用骨格メンバ部材１５０のブランク１５８の最小縦幅Ｈ１は、（ｂ）に示す車両用骨格メンバ部材４５のブランク８８の最小縦幅Ｈ２よりも小さい。これは、車両用骨格メンバ部材４５に補強ビード８５・・・（図１２参照）を備えるので最小縦幅Ｈ２が最小縦幅Ｈ１よりも広く必要であることに基づく。 14 (a) and 14 (b) are comparative explanatory views showing the developed shape of the vehicle skeleton member member formed by the press forming method of the vehicle skeleton member member according to the present invention. FIG. 14 (a) is a comparative example. FIG. 12 is a development view of the vehicle skeleton member 150 (see FIG. 12), and FIG. 12B is a development view of the vehicle skeleton member 45 (see FIG. 12) of the embodiment.
The minimum vertical width H1 of the blank 158 of the vehicle frame member member 150 shown in (a) is smaller than the minimum vertical width H2 of the blank 88 of the vehicle frame member member 45 shown in (b). This is based on the fact that the minimum vertical width H2 is required to be wider than the minimum vertical width H1 because the vehicle skeleton member 45 includes the reinforcing beads 85 (see FIG. 12).

また、（ａ）の斜線で示す材料の捨て部分１５９及び（ｂ）に示す材料の捨て部分８９を比較すると捨て部分１５９に比較して捨て部分８９のほうが少ない。
すなわち、車両用骨格メンバ部材４５は、底部８１に補強ビード８５・・・（図１２参照）を形成したので、材料の有効利用を図ることができるとともに、剛性の向上を図ることができる。 Further, when the discarded portion 159 of the material indicated by the oblique lines in (a) and the discarded portion 89 of the material shown in (b) are compared, the discarded portion 89 is smaller than the discarded portion 159.
That is, since the vehicle skeleton member 45 is formed with the reinforcing beads 85 (see FIG. 12) on the bottom 81, the material can be used effectively and the rigidity can be improved.

尚、車両用骨格メンバ部材４５は、図７に示すように、底部８１に３本の補強ビード８５・・・を図示したが、これに限るものではなく、側壁部８２，８２に沿わせて底部８１に複数の補強ビードを形成したものであればよい。 As shown in FIG. 7, the vehicle skeleton member 45 has three reinforcing beads 85... In the bottom 81, but is not limited to this, and extends along the side walls 82 and 82. What is necessary is just to form the some reinforcement bead in the bottom part 81. FIG.

本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材は、ミニバンやワゴンなどの車体フレームに採用するのに好適である。 The vehicle frame member member formed by the vehicle frame member member press molding method according to the present invention is suitable for use in a vehicle body frame such as a minivan or a wagon.

本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材を採用した車両の斜視図である。 It is a perspective view of the vehicle which employ | adopted the frame member member for vehicles formed with the press molding method of the frame member member for vehicles concerning this invention. 本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材を採用した車両のフロア構造である。 It is the floor structure of the vehicle which employ | adopted the frame member member for vehicles formed with the press molding method of the frame member member for vehicles which concerns on this invention. 本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材を採用した車体フレームの平面図である。It is a top view of the vehicle body frame which employ | adopted the frame member member for vehicles formed with the press molding method of the frame member member for vehicles concerning this invention. 本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材を採用した車体フレームの斜視図である。1 is a perspective view of a vehicle body frame that employs a vehicle frame member member formed by a press forming method for a vehicle frame member member according to the present invention. 本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材の斜視図である。 It is a perspective view of the frame member for vehicles formed by the press molding method of the frame member for vehicles concerning the present invention. 本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材の正面図である。 It is a front view of the frame member for vehicles formed with the press molding method of the frame member for vehicles concerning the present invention. 本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材の平面図である。It is a top view of the frame member for vehicles formed with the press molding method of the frame member for vehicles concerning the present invention. 図２の８−８線断面図である。FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 2. 図２の９−９線断面図である。FIG. 9 is a sectional view taken along line 9-9 in FIG. 2. 図２の１０−１０断面図である。FIG. 10 is a cross-sectional view taken along 10-10 in FIG. 本発明に係る車両用骨格メンバ部材のプレス成形方法のフロー図である。It is a flowchart of the press molding method of the frame member for vehicles concerning the present invention. 本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材の比較説明図である。 It is comparison explanatory drawing of the frame member member for vehicles formed with the press molding method of the frame member member for vehicles concerning the present invention. 本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材の断面形状を示す比較説明図である。 It is comparison explanatory drawing which shows the cross-sectional shape of the frame member for vehicles formed with the press molding method of the frame member for vehicles concerning the present invention. 本発明に係る車両用骨格メンバ部材のプレス成形方法で形成される車両用骨格メンバ部材の展開形状を示す比較説明図である。 It is a comparative explanatory view showing the development shape of the frame member member for vehicles formed with the press molding method of the frame member member for vehicles concerning the present invention. 従来の基本構成を説明する図である。It is a figure explaining the conventional basic composition.

符号の説明Explanation of symbols

１０…車両、１２…車体フレーム、４５…車両用骨格メンバ部材（第２クロスメンバ）、８１…底部、８１ａ…中心部、８１ｂ…両端部、８２…側壁部、８５…補強ビード。 DESCRIPTION OF SYMBOLS 10 ... Vehicle, 12 ... Body frame, 45 ... Vehicle frame member (2nd cross member), 81 ... Bottom part, 81a ... Center part, 81b ... Both ends, 82 ... Side wall part, 85 ... Reinforcement bead.

Claims

上方を開口させた略コ字断面状のクロスメンバであり、底部と、この底部から両側を立ち上げた側壁部と、これらの側壁部から外方に形成した前後のフランジと、前記側壁部に沿わせて前記底部に形成した複数の補強ビードとを有し、
前記底部は、車幅方向の中心部のコ字断面の深さを両端部のコ字断面の深さよりも浅く、応力の集中のないように形成したアーチ状を呈する車両用骨格メンバ部材のプレス成形方法であって、
矩形板材の相対する両辺を互いに対称な凹状にカットする工程と、前記クロスメンバの底部の両端部を除く中心部のみに前記アーチ状の底部に沿わせる補強ビードを形成する工程と、押込みプレス成形で前記補強ビードにより成形しわを抑えて前記両辺を凹状から直線状に形成するとともに前記両辺を繋ぐ前記フランジ、前記側壁部、前記底部のうち、前記底部を前記アーチ状に成形する工程と、からなり、前記クロスメンバの底部の両端部を除く前記中心部のみに、前記アーチ状の底部の両辺に沿わせた補強ビードを形成する車両用骨格メンバ部材のプレス成形方法。 It is a cross member having a substantially U-shaped cross section that opens upward, and includes a bottom portion, side wall portions raised from both sides of the bottom portion, front and rear flanges formed outward from these side wall portions, and the side wall portion. A plurality of reinforcing beads formed along the bottom along the
The bottom portion is a press for a vehicle skeleton member member having an arch shape in which the depth of the U-shaped cross-section at the center in the vehicle width direction is shallower than the depth of the U-shaped cross-section at both ends and stress concentration is not formed. A molding method,
A step of cutting opposite sides of a rectangular plate into a concave shape symmetrical to each other, a step of forming a reinforcing bead along the arched bottom only at the central portion excluding both ends of the bottom of the cross member, and indentation press molding And forming the both sides from a concave shape to a linear shape by suppressing the forming wrinkles with the reinforcing beads, and forming the bottom portion of the flange, the side wall portion, and the bottom portion into the arch shape. The press forming method of the skeleton member member for a vehicle, wherein reinforcing beads are formed along both sides of the arch-shaped bottom portion only in the central portion excluding both ends of the bottom portion of the cross member.