JP2016124299A - Connection structure of vehicle skeleton member - Google Patents
Connection structure of vehicle skeleton member Download PDFInfo
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- JP2016124299A JP2016124299A JP2014263728A JP2014263728A JP2016124299A JP 2016124299 A JP2016124299 A JP 2016124299A JP 2014263728 A JP2014263728 A JP 2014263728A JP 2014263728 A JP2014263728 A JP 2014263728A JP 2016124299 A JP2016124299 A JP 2016124299A
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- skeleton member
- composite material
- joining
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- vehicle skeleton
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Abstract
Description
本発明は、車体骨格部材の端部が接合する車体骨格部材の接合構造に関し、この接合構造に好適に用いられる接合部材に関する。 The present invention relates to a joint structure of a vehicle body skeleton member to which end portions of the vehicle body skeleton member are joined, and relates to a joining member that is suitably used for this joint structure.
車体フレームは、フロントピラーアッパーとルーフサイドレール及びルーフヘッドレール等の端部は、接合部材を介して連結されるようになっている。 In the body frame, the front pillar upper, the end of the roof side rail, the roof head rail and the like are connected via a joining member.
従来、これらフロントピラーアッパー、ルーフサイドレール、ルーフヘッドレール及び接合部材は、それぞれ押出し加工によって閉断面または開断面を有する部材に成形されている。（特許文献１）。 Conventionally, the front pillar upper, the roof side rail, the roof head rail, and the joining member are each formed into a member having a closed cross section or an open cross section by extrusion processing. (Patent Document 1).
押出し加工では、部材端部の複雑な成形、例えば段部を設ける等の成形が容易でないため、通常、ルーフヘッドレール等の骨格部材と、接合部材との接合部位は、突き合わせ溶接または重ね合わせ溶接によって接合されていた。しかしながら、このような重ね合わせ溶接等では、結合強度が弱い欠点があった。 In extrusion processing, it is not easy to form complex parts at the end of a member, for example, forming a stepped part. Therefore, the joining part between a skeleton member such as a roof head rail and a joining member is usually butt welded or lap welded. Was joined by. However, such lap welding has a drawback in that the bond strength is weak.
そこで、特許文献１では、車体骨格部材の接合構造を、鋳物で成形した接合部材の車体骨格部材との接合縁に、前記車体骨格部材の部材厚に相当する段差を有する段部を形成する接合構造が提案されている。しかし、近年使用され始めた炭素繊維複合材料製骨格部材には、適合が難しいものであった。 Therefore, in Patent Document 1, the joining structure of the vehicle body skeleton member is formed by forming a step portion having a step corresponding to the member thickness of the vehicle body skeleton member at the joining edge of the joining member formed by casting with the vehicle body skeleton member. A structure has been proposed. However, it has been difficult to adapt to a skeleton member made of carbon fiber composite material that has begun to be used in recent years.
本発明は係る事実を考慮し、フロントピラー等の骨格部材と接合部材との接合部位に強度面での制約の少ない車体骨格部材の接合構造を提供することを目的とする。 In view of such facts, an object of the present invention is to provide a joint structure for a vehicle body skeleton member with less restrictions in terms of strength at a joint portion between the skeleton member such as a front pillar and the joint member.
本出願の要旨は、車体骨格部材と車体骨格部材とを、強化繊維がランダムな配向を有する複合材料の表面を、一方向に引き揃えたピッチ系炭素繊維で強化してなる複合材料で形成した接合部材を介して接合する車体骨格部材の接合構造にある。 The gist of the present application is that a vehicle body skeleton member and a vehicle body skeleton member are formed of a composite material obtained by reinforcing the surface of a composite material in which reinforcing fibers have a random orientation with pitch-based carbon fibers aligned in one direction. It is in the joining structure of the vehicle body skeleton member joined through the joining member.
本発明によれば、より軽量で曲げ弾性率が高く、高剛性な車体骨格部材の接合構造を提供することが可能となる。 ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the joining structure of the vehicle body skeleton member which is lighter, has a high bending elastic modulus, and is highly rigid.
本発明では、接合部材として、強化繊維がランダムな配向を有する複合材料（以下、コア材と呼ぶ。）の表面を、一方向に引き揃えたピッチ系炭素繊維で強化してなる複合材料（以下、表面材と呼ぶ。）で形成した接合部材を用いることが特徴である。 In the present invention, as a bonding member, a composite material (hereinafter, referred to as a core material) in which the reinforcing fibers have a random orientation (hereinafter referred to as a core material) is reinforced with pitch-based carbon fibers arranged in one direction. , Called a surface material)).
本発明に係る車体骨格部材の接合構造は、公知のジョイントカウルサイド、ジョイントフロントピラーアッパ、ジョイントクォーターピラーアッパ及びジョイントパッケージトレイにそれぞれ適用できる。 The joint structure of the vehicle body skeleton members according to the present invention can be applied to a known joint cowl side, joint front pillar upper, joint quarter pillar upper, and joint package tray.
ここで、フロントピラーアッパ接合部材を例にして説明する。フロントピラーアッパ接合部材には、フロントピラーアッパ、ルーフサイドレール及びルーフヘッドレールの端部が挿入結合されている。 Here, the front pillar upper joining member will be described as an example. End portions of the front pillar upper, the roof side rail, and the roof head rail are inserted and coupled to the front pillar upper joining member.
（表面材）
本発明では、接合部材は、一方の面または両方の面をピッチ系炭素繊維が一方向に引き揃えられた複合材料で形成されてなることを特徴とする。ピッチ系炭素繊維を用いることで後述のコア材の強化材をポリアクリロニトリル系炭素繊維とすることと相俟って、接合部材の軽量化と曲げ弾性率を高く維持できる。
ここで、ピッチ系炭素繊維の引き揃え方向は、挿入結合される他部材の挿入方向に配向していることが好ましい。また、接合部材をねじる方向の力が作用する場合には、多部材の挿入方向に対して３０〜６０度の方向に配向していることが好ましい。
表面材を構成する複合材料のマトリックス樹脂は、後述のコア材を構成するマトリックス樹脂と同一であることが接着性の点から好ましいが、両者間の接着力が確保できれば、異なっていてもよい。エポキシ樹脂組成物やビニルエステル樹脂組成物が物性や即硬化性の点から好ましく用いられる。
(Surface material)
In the present invention, the bonding member is characterized in that one surface or both surfaces are formed of a composite material in which pitch-based carbon fibers are aligned in one direction. By using pitch-based carbon fibers, combined with the use of polyacrylonitrile-based carbon fibers as a core material reinforcement described later, the weight of the joining member and the bending elastic modulus can be maintained high.
Here, the alignment direction of the pitch-based carbon fibers is preferably oriented in the insertion direction of the other member to be inserted and coupled. Moreover, when the force of the direction which twists a joining member acts, it is preferable to orient in the direction of 30 to 60 degree | times with respect to the insertion direction of multiple members.
The matrix resin of the composite material constituting the surface material is preferably the same as the matrix resin constituting the core material described later from the viewpoint of adhesiveness, but may be different as long as the adhesive force between the two can be secured. Epoxy resin compositions and vinyl ester resin compositions are preferably used from the viewpoints of physical properties and quick curing.
（コア材）
本発明では、前記両表面材の間にコア材として、炭素繊維短繊維を強化材としてなり、繊維方向がランダムな方向に配向してなる複合材料を用いる。このような複合材料としては、チョップした炭素繊維を熱可塑性樹脂と混合し、射出成型した材料やシートモールディングコンパウンドやバルクモールディングコンパウンドと称せられる材料が挙げられる。このなかで、シートモールディングコンパウンドが成型性と成形品の物性とから好ましい。
強化繊維は、公知の強化繊維が使用可能であるが、炭素繊維が好ましく、とくにポリアクリロニトリル系炭素繊維であることが接合部材の軽量化と曲げ弾性率を高く維持する点で好ましい。
(Core material)
In the present invention, a composite material in which carbon fiber short fibers are used as reinforcing materials and the fiber directions are oriented in random directions is used as a core material between the two surface materials. Examples of such a composite material include a material obtained by mixing chopped carbon fibers with a thermoplastic resin and injection molding, a material called a sheet molding compound, or a bulk molding compound. Among these, a sheet molding compound is preferable from the viewpoint of moldability and physical properties of the molded product.
As the reinforcing fiber, a known reinforcing fiber can be used, but a carbon fiber is preferable, and a polyacrylonitrile-based carbon fiber is particularly preferable from the viewpoint of reducing the weight of the joining member and maintaining a high bending elastic modulus.
（接合部材の形状）
本発明では、接合部材の形状は、特に限定しないが、接合部材に挿入結合される車体骨格部材と結合面と接合部材の曲げ剛性を高めるリブを形成されていることが好ましい。さらに車体骨格部材を案内する「どて」部分があることが好ましい。
（接合部材と車体骨格部材との結合）
本発明では、接合部材と車体骨格部材との結合は、接着剤による接着のほか、締結部材による締結など公知の方法が採用されうる。
(Shape of joining member)
In the present invention, the shape of the joining member is not particularly limited, but it is preferable that a vehicle body skeleton member inserted and coupled to the joining member, a joining surface, and a rib that increases the bending rigidity of the joining member are formed. In addition, it is preferable that there is a “head” portion for guiding the vehicle body frame member.
(Combination of joining member and body frame member)
In the present invention, the joining member and the vehicle body skeleton member may be joined by a known method such as fastening by a fastening member in addition to adhesion by an adhesive.
（接合部材の成形）
コア材として、シートモールディングコンパウンドを使用する場合は、接合部材は、表面材層を形成するプリプレグ積層体とコア材層を形成するシートモールディングコンパウンドと反対面の表面材層を形成するプリプレグ積層体を重ねたのち、あらかじめマトリックス樹脂の硬化温度とした接合部材を形成する成形金型内に配置し、型締め、押圧を加えて成形できる。
(Molding of joining members)
When a sheet molding compound is used as the core material, the joining member includes a prepreg laminate that forms the surface material layer and a prepreg laminate that forms the surface material layer opposite to the sheet molding compound that forms the core material layer. After stacking, it can be placed in a molding die for forming a joining member having a curing temperature of the matrix resin in advance, and can be molded by clamping and pressing.
（接合部材の軽量化効果）
次に、平板状の接合部材（全体厚みｔ＝５ｍｍ）を仮定して、以下の二式から計算される軽量化（％）と曲げ弾性率（ＧＰa）の表面材層厚み（両面に配した合計厚み（ｍｍ））依存性を図１に示した。
(Weight reduction effect of joining members)
Next, assuming a flat joint member (overall thickness t = 5 mm), the surface material layer thickness (weight distribution (%) and bending elastic modulus (GPa) calculated from the following two formulas are arranged on both sides) The dependence on the total thickness (mm) is shown in FIG.
全体曲げ弾性率（ＧＰa）Ｅ＝ＥＳＭＣ×（ＥＳＭＣ×ｔＳＭＣ ３／１２＋ＥＵＤ×（ｔ３−ｔＳＭＣ ３）／１２）／（ＥＳＭＣ×ｔ３／１２） Overall flexural modulus (GPa) E = E SMC × (E SMC × t SMC 3/12 + E UD × (t 3 -t SMC 3) / 12) / (E SMC × t 3/12)
軽量化（％）＝（（ρＳＭＣ×ｔＳＭＣ／ｔ＋ρＵＤ×（ｔ−ｔＳＭＣ）／ｔ）／ρＳＭＣ）／（Ｅ／ＥＳＭＣ）１／３ Weight reduction (%) = ((ρ SMC × t SMC / t + ρ UD × (t−t SMC ) / t) / ρ SMC ) / (E / E SMC ) 1/3
表面材曲げ弾性率（ＧＰａ）：ＥＵＤ
コア材曲げ弾性率（ＧＰａ）：ＥＳＭＣ
全体曲げ弾性率（ＧＰａ）：Ｅ
表面材密度（ｇ／ｃｍ３）：ρＵＤ
コア材密度（ｇ／ｃｍ３）：ρＳＭＣ
全体厚み（ｍｍ）：ｔ
コア材厚み（ｍｍ）：ｔＳＭＣ
Surface material flexural modulus (GPa): E UD
Core material flexural modulus (GPa): E SMC
Overall flexural modulus (GPa): E
Surface material density (g / cm 3 ): ρ UD
Core material density (g / cm 3 ): ρ SMC
Overall thickness (mm): t
Core material thickness (mm): t SMC
Claims (4)
The joint structure of a vehicle body skeleton member according to any one of claims 1 to 3, wherein a composite material obtained by molding a sheet molding compound is used as the composite material in which the reinforcing fibers have a random orientation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014263728A JP6600942B2 (en) | 2014-12-26 | 2014-12-26 | Bonding structure of skeleton members for car bodies |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014263728A JP6600942B2 (en) | 2014-12-26 | 2014-12-26 | Bonding structure of skeleton members for car bodies |
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| Publication Number | Publication Date |
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| JP2016124299A true JP2016124299A (en) | 2016-07-11 |
| JP6600942B2 JP6600942B2 (en) | 2019-11-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11878642B2 (en) | 2017-04-18 | 2024-01-23 | Lg Hausys, Ltd. | Vehicle back beam and vehicle including same |
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|---|---|---|---|---|
| JP2008207791A (en) * | 2007-02-02 | 2008-09-11 | Toray Ind Inc | Cfrp made panel structure |
| JP2010222578A (en) * | 2009-02-27 | 2010-10-07 | Asahi Kasei Chemicals Corp | Resin composition for exterior decoration material |
| JP2011213312A (en) * | 2010-04-02 | 2011-10-27 | Toyoda Gosei Co Ltd | Chassis frame |
| WO2012105716A1 (en) * | 2011-02-03 | 2012-08-09 | 帝人株式会社 | Vehicle skeleton member |
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2014
- 2014-12-26 JP JP2014263728A patent/JP6600942B2/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008207791A (en) * | 2007-02-02 | 2008-09-11 | Toray Ind Inc | Cfrp made panel structure |
| JP2010222578A (en) * | 2009-02-27 | 2010-10-07 | Asahi Kasei Chemicals Corp | Resin composition for exterior decoration material |
| JP2011213312A (en) * | 2010-04-02 | 2011-10-27 | Toyoda Gosei Co Ltd | Chassis frame |
| WO2012105716A1 (en) * | 2011-02-03 | 2012-08-09 | 帝人株式会社 | Vehicle skeleton member |
| CN103339023A (en) * | 2011-02-03 | 2013-10-02 | 帝人株式会社 | Vehicle skeleton member |
| US20130313862A1 (en) * | 2011-02-03 | 2013-11-28 | Teijin Limited | Vehicle Skeleton Member |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11878642B2 (en) | 2017-04-18 | 2024-01-23 | Lg Hausys, Ltd. | Vehicle back beam and vehicle including same |
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| JP6600942B2 (en) | 2019-11-06 |
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