JP7050386B2 - Manufacturing method of vehicle body components - Google Patents

Manufacturing method of vehicle body components Download PDF

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JP7050386B2
JP7050386B2 JP2018062356A JP2018062356A JP7050386B2 JP 7050386 B2 JP7050386 B2 JP 7050386B2 JP 2018062356 A JP2018062356 A JP 2018062356A JP 2018062356 A JP2018062356 A JP 2018062356A JP 7050386 B2 JP7050386 B2 JP 7050386B2
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reinforcing
vehicle body
reinforcing member
wall portion
blank material
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JP2019172058A (en
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茂樹 沖野
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Daihatsu Motor Co Ltd
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Description

本発明は、ピラーやサイドシル等の車体構成部材を補強するための部材に関する。 The present invention relates to a member for reinforcing a vehicle body component such as a pillar or a side sill.

従来、自動車に係る車体構成部材のプレス成形には、板厚や材質又は強度が異なる複数の鋼板同士を接合してなるテーラードブランク材が用いられる。テーラードブランク材を車体に使用することで、必要な部位に必要な板厚、材質あるいは強度を付与でき、車体の軽量化をも実現できる。 Conventionally, a tailored blank material made by joining a plurality of steel plates having different thicknesses, materials, or strengths is used for press forming of vehicle body components related to automobiles. By using a tailored blank material for the car body, it is possible to impart the required plate thickness, material or strength to the required parts, and it is also possible to realize weight reduction of the car body.

例えば特許文献１には、異なる板厚を有する複数の板材を組み合わせて溶接突き合わせ面を構成し、この溶接突き合わせ面に沿ってレーザ溶接等を行うことで、テーラードブランク材を製造する方法が開示される。しかしながら、このようなテーラードブランク材の製造方法では、レーザ溶接装置等の設備が別途必要となり、当該装置自体のコスト及び製造工程の複雑化によって、テーラードブランク材、ひいては車体構成部材の製造コストが増加するという問題があった。 For example, Patent Document 1 discloses a method of manufacturing a tailored blank material by forming a welded butt surface by combining a plurality of plate materials having different plate thicknesses and performing laser welding or the like along the welded butt surface. Weld. However, such a method for manufacturing a tailored blank material requires additional equipment such as a laser welding device, and the cost of the device itself and the complexity of the manufacturing process increase the manufacturing cost of the tailored blank material and the vehicle body components. There was a problem of doing.

テーラードブランク材を使用することなくその強度を高めることが可能な車体構成部材として、パッチワーク構造を有するものが挙げられる。この車体構成部材は、パッチ部材と呼ばれる補強部材を接合することにより補強される。例えば特許文献２には、内側にパッチ部材（補強プレート）を溶接してなるＢピラーが開示される。また、特許文献３には、パッチ部材を有するピラーリインフォースをピラーインナとピラーアウタとの間に介在させてなるピラー補強構造が開示されている。 As a vehicle body component member capable of increasing its strength without using a tailored blank material, a member having a patchwork structure can be mentioned. This vehicle body component is reinforced by joining a reinforcing member called a patch member. For example, Patent Document 2 discloses a B-pillar formed by welding a patch member (reinforcing plate) inside. Further, Patent Document 3 discloses a pillar reinforcing structure in which a pillar reinforce having a patch member is interposed between a pillar inner and a pillar outer.

特開２００１－２０５４３２号公報Japanese Unexamined Patent Publication No. 2001-205432 特表２０１５－５２２４８３号公報Japanese Patent Application Laid-Open No. 2015-522883 特開２０１４－６９６３２号公報Japanese Unexamined Patent Publication No. 2014-69632

従来のようにパッチ部材により車体構成部材を補強する場合、車体構成部材の強度を高めるには、パッチ部材の長さ、幅、及び厚さ等の寸法を増大させればよい。しかしながら、これではパッチ部材の重量増加に伴う車体構成部材の製造コストの増加や車両の燃費悪化を招くことになる。 When the vehicle body component is reinforced by the patch member as in the conventional case, in order to increase the strength of the vehicle body component, the length, width, thickness and other dimensions of the patch member may be increased. However, this causes an increase in the manufacturing cost of the vehicle body constituent member and a deterioration in the fuel efficiency of the vehicle due to the increase in the weight of the patch member.

そこで本発明は、補強部材の重量を増加させることなくその強度を高めることを技術的課題とする。 Therefore, the technical subject of the present invention is to increase the strength of the reinforcing member without increasing the weight of the reinforcing member.

本発明は上記の課題を解決するためのものであり、車体構成部材に用いられる補強部材であって、エンボス部により構成される補強部を備えることを特徴とする。 The present invention is for solving the above-mentioned problems, and is a reinforcing member used for a vehicle body constituent member, and is characterized by including a reinforcing portion composed of an embossed portion.

かかる構成によれば、補強部をエンボス部（凹凸部）により構成することで、補強部材の重量を増加させることなく当該補強部の断面二次モーメントを増大させ、もってその強度を可及的に高めることが可能になる。 According to such a configuration, by forming the reinforcing portion by the embossed portion (concave and convex portion), the moment of inertia of area of the reinforcing portion is increased without increasing the weight of the reinforcing member, and the strength thereof can be increased as much as possible. It will be possible to increase.

本発明によれば、補強部材の重量を増加させることなくその強度を高めることができる。 According to the present invention, the strength of the reinforcing member can be increased without increasing the weight of the reinforcing member.

車体構成部材を示す平面図である。It is a top view which shows the vehicle body component. 図１のＩＩ－ＩＩ線断面図である。FIG. 2 is a sectional view taken along line II-II of FIG. 補強部材の斜視図である。It is a perspective view of a reinforcing member.

以下、本発明を実施するための形態について、図面を参照しながら説明する。図１乃至図３は、本発明に係る補強部材及びこの補強部材を備える車体構成部材の一実施形態を示す。本実施形態では、補強対象となる車体構成部材として、Ｂピラー（センターピラー）に係るアウタパネルを例示する。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. 1 to 3 show an embodiment of a reinforcing member according to the present invention and a vehicle body component including the reinforcing member. In this embodiment, an outer panel related to a B pillar (center pillar) is exemplified as a vehicle body component to be reinforced.

図１及び図２に示すように、車体構成部材１は、天壁部２と、天壁部２の幅方向端部に一体に形成される一対の側壁部３と、側壁部３の端部に形成されるフランジ部４とを備える。天壁部２及び側壁部３は、内面２ａ，３ａ及び外面２ｂ，３ｂを有する。 As shown in FIGS. 1 and 2, the vehicle body component 1 includes a top wall portion 2, a pair of side wall portions 3 integrally formed at the widthwise end portions of the top wall portion 2, and an end portion of the side wall portion 3. It is provided with a flange portion 4 formed in. The top wall portion 2 and the side wall portion 3 have inner surfaces 2a and 3a and outer surfaces 2b and 3b.

車体構成部材１は、例えば高張力鋼板をプレス成形することにより構成される。すなわち、車体構成部材１は、ロール状に巻かれた原料鋼板から所定形状のブランク材を切り出すブランキング工程、及びブランク材にプレス成形を施す成形工程を経て製造される。 The vehicle body component 1 is formed by, for example, press-forming a high-strength steel plate. That is, the vehicle body constituent member 1 is manufactured through a blanking step of cutting out a blank material having a predetermined shape from a raw material steel plate wound in a roll shape, and a molding step of pressing the blank material.

車体構成部材１は、その長手方向中途部の内側に補強部材５（パッチ部材）を有する。補強部材５は、車体構成部材１の天壁部２に対応する補強部６と、補強部６の幅方向端部に形成される一対の側壁部７と、を備える。 The vehicle body component 1 has a reinforcing member 5 (patch member) inside the middle portion in the longitudinal direction thereof. The reinforcing member 5 includes a reinforcing portion 6 corresponding to the top wall portion 2 of the vehicle body constituent member 1, and a pair of side wall portions 7 formed at the widthwise end portions of the reinforcing portion 6.

図２及び図３に示すように、補強部６は、複数の凹部８及び凸部９を交互に有するエンボス部により構成される。凹部８は、所定の方向に沿って長尺状かつ直線状に構成される凹条部である。凸部９は、凹部８と平行に構成される長尺状かつ直線状の凸条部である。凸部９は、天壁部２の内面２ａに接触しているが、これに限らず凸部９と内面２ａとの間に若干の隙間が在ってもよい。補強部６は、その凹部８及び凸部９が車体構成部材１の長手方向に沿うように配置されることが望ましい（図１参照）。これにより、車体構成部材１（Ｂピラー）の曲げ強度を向上させることができる。 As shown in FIGS. 2 and 3, the reinforcing portion 6 is composed of embossed portions having a plurality of concave portions 8 and convex portions 9 alternately. The concave portion 8 is a concave portion formed in a long and linear shape along a predetermined direction. The convex portion 9 is a long and linear convex portion formed in parallel with the concave portion 8. The convex portion 9 is in contact with the inner surface 2a of the top wall portion 2, but the present invention is not limited to this, and there may be a slight gap between the convex portion 9 and the inner surface 2a. It is desirable that the reinforcing portion 6 is arranged so that the concave portion 8 and the convex portion 9 are arranged along the longitudinal direction of the vehicle body constituent member 1 (see FIG. 1). As a result, the bending strength of the vehicle body component 1 (B pillar) can be improved.

凸部９が形成される部位の厚さ寸法Ｔ１は、凹部８が形成される部位の厚さ寸法Ｔ２よりも大きくなっている。換言すると、補強部６は、厚肉部（凸部９）と薄肉部（凹部８）とが交互に形成されたものといえる。厚肉部の厚さ寸法Ｔ１は、側壁部７の厚さ寸法Ｔ３よりも大きく設定されることが望ましい。 The thickness dimension T1 of the portion where the convex portion 9 is formed is larger than the thickness dimension T2 of the portion where the concave portion 8 is formed. In other words, it can be said that the reinforcing portion 6 is formed by alternately forming a thick portion (convex portion 9) and a thin wall portion (concave portion 8). It is desirable that the thickness dimension T1 of the thick portion is set to be larger than the thickness dimension T3 of the side wall portion 7.

補強部６（エンボス部）は、例えば高張力鋼等からなる鋼板に対して、圧延加工を行うことにより形成される。具体的には、補強部６は、エンボス部を形成するための凹凸部を有する圧延ロールにより逐次成形を行うことで形成される。このような圧延加工により、凹部８及び凸部９を加工硬化させることができ、補強部６の強度を可及的に向上させることができる。なお、補強部材５としては、ブランキング工程において車体構成部材１用のブランク材を形成する場合に、トリミングにより発生する端材を利用してもよい。 The reinforcing portion 6 (embossed portion) is formed by rolling a steel plate made of, for example, high-strength steel. Specifically, the reinforcing portion 6 is formed by sequentially forming with a rolling roll having an uneven portion for forming the embossed portion. By such rolling processing, the concave portion 8 and the convex portion 9 can be work-hardened, and the strength of the reinforcing portion 6 can be improved as much as possible. As the reinforcing member 5, scraps generated by trimming may be used when forming a blank material for the vehicle body constituent member 1 in the blanking process.

補強部材５の側壁部７は、補強部６に対して所定の角度で折曲されてなる平板状の部分である。側壁部７は、スポット溶接等の手段により、車体構成部材１に係る側壁部３の内面３ａに固定されている。側壁部７は、圧延工程によって補強部６を形成した後に、プレス成形（成形工程）を行うことで形成される。側壁部７のプレス成形は、車体構成部材１に係る成形工程において同時に行われることが望ましい。 The side wall portion 7 of the reinforcing member 5 is a flat plate-shaped portion that is bent at a predetermined angle with respect to the reinforcing portion 6. The side wall portion 7 is fixed to the inner surface 3a of the side wall portion 3 related to the vehicle body component 1 by means such as spot welding. The side wall portion 7 is formed by performing press molding (molding step) after forming the reinforcing portion 6 by the rolling step. It is desirable that the press molding of the side wall portion 7 is performed at the same time in the molding step related to the vehicle body constituent member 1.

この場合、補強部６を圧延工程によって形成した直後の側壁部７は、図２において二点鎖線で示すように、補強部６と平行に構成されている。側壁部７は、この状態のままで車体構成部材１に係るプレス成形前のブランク材に溶接される（溶接工程）。その後、補強部材５が固定されたブランク材をプレス成形すること（成形工程）で、補強部材５を備えた車体構成部材１を効率良く製造できる。 In this case, the side wall portion 7 immediately after the reinforcing portion 6 is formed by the rolling step is configured in parallel with the reinforcing portion 6 as shown by the two-dot chain line in FIG. The side wall portion 7 is welded to the blank material before press molding related to the vehicle body component 1 in this state (welding step). After that, by press-molding the blank material to which the reinforcing member 5 is fixed (molding step), the vehicle body constituent member 1 provided with the reinforcing member 5 can be efficiently manufactured.

以上説明した本実施形態によれば、補強部６に凹部８及び凸部９によるエンボス部を形成することで、補強部材５の重量を増加させることなく、補強部６の断面二次モーメントを向上させることができる。さらに、圧延工程（冷間加工）によって補強部６（凹部８及び凸部９）に生じる加工硬化により、補強部６における凹部８及び凸部９の長手方向に対する剛性を高めることが可能になる。 According to the present embodiment described above, by forming the embossed portion by the concave portion 8 and the convex portion 9 in the reinforcing portion 6, the moment of inertia of area of the reinforcing portion 6 is improved without increasing the weight of the reinforcing member 5. Can be made to. Further, work hardening generated in the reinforcing portion 6 (concave portion 8 and convex portion 9) by the rolling process (cold working) makes it possible to increase the rigidity of the concave portion 8 and the convex portion 9 in the reinforcing portion 6 in the longitudinal direction.

なお、本発明は、上記実施形態の構成に限定されるものではなく、また、上記した作用効果に限定されるものでもない。本発明は、本発明の要旨を逸脱しない範囲で種々の変更が可能である。 It should be noted that the present invention is not limited to the configuration of the above embodiment, nor is it limited to the above-mentioned action and effect. The present invention can be modified in various ways without departing from the gist of the present invention.

上記の実施形態では、直線状の凹部８又は凸部９を有する補強部材５を例示したが、本発明はこれらの構成に限定されるものではない。例えば、補強部材５（補強部６）は、ドット状の凹部８又は凸部９を形成してなるものであってもよい。また、凸部９（厚肉部）は、平面視において格子状に構成されてもよい。 In the above embodiment, the reinforcing member 5 having the linear concave portion 8 or the convex portion 9 is exemplified, but the present invention is not limited to these configurations. For example, the reinforcing member 5 (reinforcing portion 6) may be formed by forming a dot-shaped concave portion 8 or a convex portion 9. Further, the convex portion 9 (thick portion) may be configured in a grid pattern in a plan view.

上記の実施形態では、車体構成部材１として、Ｂピラーを例示したが、これに限らず、本発明は、サイドシル、Ａピラーその他の車体構成部材１の補強に適用できる。 In the above embodiment, the B-pillar is exemplified as the vehicle body component 1, but the present invention is not limited to this, and the present invention can be applied to the reinforcement of the side sill, the A-pillar and other vehicle body components 1.

補強部材５の補強部６としては、複数枚の鋼板を重ね合わせるとともに、これらの鋼板を上記実施形態における圧延工程で一体化することにより構成してもよい。また、上記の実施形態において、補強部６は補強部材５の外面側に形成されていたが、これに限らず、補強部材５の内面側に形成されてもよく、外面側と内面側の両方に形成されてもよい。 The reinforcing portion 6 of the reinforcing member 5 may be configured by stacking a plurality of steel plates and integrating these steel plates in the rolling step in the above embodiment. Further, in the above embodiment, the reinforcing portion 6 is formed on the outer surface side of the reinforcing member 5, but the present invention is not limited to this, and the reinforcing portion 6 may be formed on the inner surface side of the reinforcing member 5, both on the outer surface side and the inner surface side. May be formed in.

上記の実施形態では、車体構成部材１のプレス成形と同時に補強部材５を成形する例を示したが、これに限らず、車体構成部材１をプレス成形した後に、別途成形してなる補強部材５を溶接等により当該車体構成部材１に固定してもよい。 In the above embodiment, an example in which the reinforcing member 5 is molded at the same time as the press molding of the vehicle body constituent member 1 is shown, but the present invention is not limited to this, and the reinforcing member 5 which is separately molded after the vehicle body constituent member 1 is press-molded is not limited to this. May be fixed to the vehicle body component 1 by welding or the like.

上記の実施形態では、車体構成部材１を構成するパネルに補強部材５を固定した例を示したが、本発明はこの構成に限定されず、補強部材５は、アウタパネルとインナパネルとの間に介在するリインフォースパネルに固定されてもよい。 In the above embodiment, an example in which the reinforcing member 5 is fixed to the panel constituting the vehicle body constituent member 1 is shown, but the present invention is not limited to this configuration, and the reinforcing member 5 is provided between the outer panel and the inner panel. It may be fixed to an intervening relief panel.

１ 車体構成部材
５ 補強部材
６ 補強部 1 Body components 5 Reinforcing members 6 Reinforcing parts

Claims (1)

補強部材を備える車体構成部材を製造する方法において、In the method of manufacturing a vehicle body component including a reinforcing member,
前記車体構成部材は、天壁部と、前記天壁部に対して折曲されてなる側壁部と、を備え、The vehicle body component includes a top wall portion and a side wall portion bent with respect to the top wall portion.
前記補強部材は、前記天壁部を補強する補強部と、前記補強部に対して折曲されてなる側壁部と、を備え、The reinforcing member includes a reinforcing portion for reinforcing the top wall portion and a side wall portion bent with respect to the reinforcing portion.
前記補強部は、エンボス部により構成され、The reinforcing portion is composed of an embossed portion.
前記補強部材を形成するための鋼板に対して圧延加工を行うことにより前記補強部を形成する工程と、前記車体構成部材を形成するための鋼板からなるブランク材に前記補強部材を溶接する工程と、前記ブランク材及び前記補強部材をプレス成形する工程と、を備え、A step of forming the reinforcing portion by rolling a steel plate for forming the reinforcing member, and a step of welding the reinforcing member to a blank material made of a steel plate for forming the vehicle body constituent member. A step of press-molding the blank material and the reinforcing member.
前記補強部を形成する工程では、前記補強部材の前記側壁部を前記補強部に対して平行に構成し、In the step of forming the reinforcing portion, the side wall portion of the reinforcing member is formed parallel to the reinforcing portion.
前記ブランク材に前記補強部材を溶接する工程では、前記補強部に対して平行に構成される前記補強部材の前記側壁部を、前記ブランク材に溶接し、In the step of welding the reinforcing member to the blank material, the side wall portion of the reinforcing member configured parallel to the reinforcing portion is welded to the blank material.
前記ブランク材及び前記補強部材をプレス成形する工程では、前記ブランク材と、前記ブランク材に溶接された前記補強部材とを同時にプレス成形することで、前記車体構成部材の前記側壁部と、前記補強部材の前記側壁部とを成形することを特徴とする車体構成部材の製造方法。In the step of press-molding the blank material and the reinforcing member, the blank material and the reinforcing member welded to the blank material are simultaneously press-molded to simultaneously press-mold the side wall portion of the vehicle body constituent member and the reinforcing member. A method for manufacturing a vehicle body constituent member, which comprises molding the side wall portion of the member.
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