JP3567772B2 - Unequal thickness center pillar members - Google Patents

Unequal thickness center pillar members Download PDF

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Publication number
JP3567772B2
JP3567772B2 JP36351098A JP36351098A JP3567772B2 JP 3567772 B2 JP3567772 B2 JP 3567772B2 JP 36351098 A JP36351098 A JP 36351098A JP 36351098 A JP36351098 A JP 36351098A JP 3567772 B2 JP3567772 B2 JP 3567772B2
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Prior art keywords
center pillar
pillar
striker
recess
unequal
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JP2000177630A (en
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浩朗 山本
久仁夫 高岡
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Mitsubishi Motors Corp
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Mitsubishi Motors Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、自動車の乗降口をフロント側とリア側とに区画するのに用いられる不等厚センターピラー部材に関する。
【0002】
【従来の技術】
自動車では、ルーフサイドレールアウタ部分、フロントピラーアウタ部分、センターピラーアウタ部分およびサイドシルアウタ部分といった車体サイド各部のアウタパネル部分を一枚のパネルから成形してなるサイドパネルと呼ばれるパネル部品を採用して、ボディを組み立てることが行われている。
【0003】
ところで、センターピラーは車室に開口する乗降口の中央に配置されるため、安全性の確保のために特に外部から加わる衝突力から車室を守る強度が求められる。
【0004】
ところが、サイドパネルは、同一の板厚の金属パネルをプレス成形して各部(アウタパネル部分)を形成したパネル構造物であるので、センターピラーアウタ部分だけ強度を高めることは難しく、衝突安全性のための強度が確保しにくい。
【0005】
そこで、サイドパネルでは、断面ハット形をなすセンターピラーアウタ部分の柱部の内部に、同柱部の内面に沿うように、センターピラーアウタ部分の形状と略同じ形状のセンターピラーリンフォースを嵌めて溶接で固定し、センターピラーアウタ部分の強度だけを補強して衝突安全性の向上を図ることが行われている。
【0006】
従来、こうしたセンターピラーリンフォースは、最も強度を必要する部分を選んで定めた所定板厚の金属パネルにプレス成形を施して、センターピラーアウタ部分と組合う形状に成形したパネル部材が用いられる。具体的には、センターピラーリンフォースには、センターピラーアウター部分と同形状となるように、上端部にルーフサイドと接合可能なT字状のルーフ側接続部を有し、下端部にサイドシルと接続可能な逆T字状のサイドシル側接続部を有し、これら両者間に中段からルーフ側接続部に向かうにしたがって車室内へ曲がる断面ハット形の柱部を有し、同柱部の中段に該柱部の一側壁を柱部内部へ凹陥させてなるストライカ用凹陥部を有したパネル構造物が採用される。そして、柱部がセンターピラーアウタ部分内に嵌挿されて同アウタ部分の内面に溶接で固定される構造してあり、これでルーフ側接続部からサイドシル側接続部までのセンターピラーアウタ全体の補強を行なう。
【0007】
ところで、周知のようにセンターピラーアウタ部分は、ルーフ側の端部外形はドア窓の面積をできるだけ確保する等のために細く、サイドシル側の端部外形はシートベルト装置のリトラクタを格納する等のために太くしてあり、このセンターピラーアウタ部分内に嵌まるようセンターピラーリンフォースは、ルーフ側の端部を細いT字状の外形にし、サイドシル側の端部を太い逆T字状の外形にしてある。
【0008】
ところが、上部側の断面係数が低、下部側の断面係数が大なセンターピラーアウタ部分に、同一板厚のセンターピラーリンフォースが組合うと、センターピラーアウタ部分の上部は、望まれる強度に補強されるものの、センターピラーアウタ部分の下部は、同アウタ部分の上部と下部との断面係数との差分、過剰に強度の補強が行われてしまう。
【0009】
このため、補強を終えたセンタピラーアウタ部分は重量が過大になりやすく、不必要に自動車のボディ重量が増すおそれがある。
【0010】
そこで、実開平3−60873号、特開平6−218540号に開示されているように、異なる板厚の板材の端部同士を横方向に連続する溶接(マッシュシーム溶接)で接合したブランク部材を用い同ブランク部材にプレス成形を施すという技術を採用して、断面係数の低いルーフ側接続部がある上部側の板厚を厚く、断面係数の高いサイドシル側接続部がある下部側の板厚を薄くした不等厚センターピラーリンフォース(センターピラー部材に相当)を成形し、同不等厚センターピラーリンフォースがセンターピラーアウタ部分と組合うと、同アウタ部分の全体において望まれる強度が得られるようにすることが考えられる。
【0011】
こうした異なる板厚の板材を接合したブランク部材から成形したセンターピラーリンフォースを採用すると、重量の低減が図れるだけでなく、材料の歩留り(材料取り)が良好になる利点がある。
【0012】
【発明が解決しようとする課題】
ところで、板材を溶接した部分は、接合線に沿う横方向には伸びやすいが、接合線と直角な方向、すなわち上下方向に対しては伸びにくい。
【0013】
ところが、ブランク部材からプレス成形されるセンターピラーリンフォースは、パネルから断面ハット形のように横方向に伸びて成形されるだけでなく、車室内へ曲がる柱部分など上下方向に伸びて成形される部分の数も多い。
【0014】
このため、ブランク部材で成形されたセンターピラーリンフォースを採用すると、プレス成形における上下方向の伸びで、成形後の溶接部分に亀裂を生じさせるおそれがあり、信頼性、品質の点で優れるセンターピラーリンフォースが得られないことがある。
【0015】
この点は、センターピラーアウタだけを成形したセンターピラーアウタパネル部品のときも同様である。
【0016】
こうしたブランク部材でセンターピラー部材を形成する技術は、先に延べたような重量、コストの点に優れているので、同利点を生かすべく、溶接部分の歪みの解消が望まれている。
【0017】
本発明は上記事情に着目してなされたもので、その目的とするところは、溶接部分に歪みが残らない品質の良い部材で、ルーフ側、サイドシル側に応じた有効なピラー強度を確保できる不等厚センターピラー部材を提供することにある。
【0018】
【課題を解決するための手段】
上記目的を達成するために請求項1に記載した不等厚センターピラー部材は、異なる板厚の板材の端部同士を溶接で接合してなるブランク部材の溶接の接合線を、該センターピラー部材の本体部の柱部を形成するうち、断面が一定な形状となるストライカ用凹陥部がある柱部分で、かつ高い荷重作用するストライカが取付く取付位置を避けて、同凹陥部の底面を通り柱部を横切る位置に設定する構造とした。
【0019】
これにより、亀裂が溶接部に発生しくくした不等厚センターピラー部材が得られる。しかも、強度が求められるルーフ側には板厚の厚い板材が配置され、強度が低くてすむサイドシール側には板厚の薄い板材が配置されるから、亀裂の発生のない不等厚センターピラー部材を用いて有効なピラー強度を得ることができる。
【0020】
請求項2に記載した不等厚センターピラー部材は、上記目的に加え、歪みの要因となる材料の上下方向の流動(伸び)が抑止されるよう、溶接の接合線を、ストライカ用凹陥部がなす下側角部の近くを通過して柱部を横切る位置に定めることにより、一層、品質の高い不等厚センターピラー部材が得られるようにした。
【0021】
【発明の実施の形態】
以下、本発明を図1ないし図3に示す一実施形態にもとづいて説明する。
【0022】
図1中1は、乗用車(自動車)のボディ構造の一部、例えばサイドパネルを示す。サイドパネル1は、例えばフロントピラーアウタ部分2、ルーフサイドアウタ部分3、センターピラーアウタ部分4およびサイドシルアウタ部分5などといったアウタパネル部分を一枚(同一板厚)のパネルから成形してある。
【0023】
乗降口6の中央を区画するセンターピラーアウタ部分4は、ルーフ側の上端部がドア窓面積の確保のために細く、サイドシル側の下端部がシートベルト装置のリトラクタ(図示しない)を格納するために太くした断面ハット形の支柱4aから形成してある。また支柱4の互いに対向する側壁のうち、中段のフロント側の側壁4b(図2、図3に図示)には、支柱内方へ凹陥する凹陥部7が形成してある。この凹陥部7により細くなった支柱部分4cは、断面積の変化がなく上下方向に均等に真っ直ぐ延びる部位で、この凹陥部7の底面に、フロントドアに装着してあるラッチ(いずれも図示しない)と組合うストライカ8が取付けられる。
【0024】
一方、10はセンターピラーアウタ部分4を補強する不等厚センターピラーリンフォース(不等厚センターピラー部材に相当)である。
【0025】
このセンターピラーリンフォース10の本体部10aには、図1中で示されるような異なる板厚の二枚の板材11,12(第1板材、第2板材に相当)の端部同士をマッシュシーム溶接で横方向に連続するように接合したブランク部材14を用意し、これにプレス成形を施して、センターピラーアウタ部分4と同形状のパネル構造物を形成する技術が用いられている。
【0026】
詳しくは、ブランク部材14は、センターピラーアウタ部分4の中段からルーフ側の上端部までのピラー形状に合せて材料取りした板厚が厚いT字状の板材11(例えば板厚t1が1.2mm)を上側に配置し、センターピラーアウタ部分4の中段からサイドシル側の下端部までのピラー形状に合せて材料取りした板厚が薄い逆T字状の板材12(例えば板厚t2が0.9mm)を下側に配置し、板材11の下端と板材12の上端同士をマッシュシーム溶接で接合して形成してある(t1>t2)。そして、このブランク部材14にプレス成形を施して、センターピラーアウタ部分4の内部に嵌合可能な外形状の不等厚センターピラーリンフォース10を成形している。具体的には、不等厚センターピラーリンフォース10は、上端にルーフサイドと接合可能な細径のT字状のルーフ側接続部16(第1接続部に相当)を有し、下端にサイドシルと接続可能な太径の逆T字状のサイドシル側接続部17(第2接続部に相当)を有し、これら接続部16,17間に該接続部16,17をつなぐ中段からルーフ側接続部16に向かうにしたがって車室内へ曲がる断面ハット形の柱部18を有し、同柱部18の中段に該フロント側の側壁18aの一部分を凹陥部7にならって柱部内部へ凹陥させてなるストライカ用凹陥部19を有して形成される。
【0027】
そして、図2および図3に示されるように柱部18がセンターピラーアウタ部4の開口から嵌挿される。また重なる各支柱4a,柱部18の開口縁のフランジ4c,18b同士が溶接される。
【0028】
これにより、センターピラーアウタ部4の内面全体にセンターピラーリンフォース10が固定され、断面係数の低いセンターピラーアウタ部4のルーフ側Xを板厚の厚い部分で補強し、断面係数の高いセンターピラーアウタ部5のサイドシル側Yを板厚の薄い部分で補強して、ルーフ側からサイドシル側までのセンターピラーアウタ部分5の全体を望まれる強度となるように補強している。
【0029】
このとき、不等厚センタピラーリンフォース10の板材11と板材12とがなす溶接の接合線13、すなわち溶接部分は、図1中に示されるようにストライカ用凹陥部19の底面19aを通過する位置に形成してある。すなわち、ブランク部材14の接合線13は、高い荷重作用するストライカ8が取り付く取付位置を避けた底面を通りストライカ用凹陥部19により細くなった柱部分18cを横切るような位置に位置決めてある。さらに詳しく述べれば、接合線13はストライカ用凹陥部19がなす下側角部19b(Rエンド)の近傍を通過して柱部分18cを横切るような位置に形成してある。
【0030】
ここで、ストライカ用凹陥部19が形成される中段の柱部分18cは、上下方向における断面形状の変化が少ない部分、つまりプレス成形が行なわれると、横方向には材料の伸びが出るが上下方向には材料の伸びが出なくてすむ断面が一定なハット形が形成される部分であるから、ストライカ用凹陥部19の底面19aを通り柱部分18cを横切る位置に接合線13を定めたことにより、プレス成形に伴う亀裂が溶接部分(接合線13)に発生しにくくなる。
【0031】
したがって、ルーフ側、サイドシル側に応じた有効なピラー強度を得ることができるだけでなく、溶接部分における亀裂を抑えた、信頼性、品質に優れた不等厚センターピラーリンフォース10を提供できる。特に接合線13を下側角部19bの近傍を通過するように設定したことにより、同角部分で歪みの要因となる材料の上下方向の流動(伸び)が抑止されるから、一層、上下方向の伸びが少なく、亀裂に発生しにくい高い品質の不等厚センターピラーリンフォース10を提供できる。
【0032】
しかも、同効果は、別途、構造を必要とせずに、接合線13の設定だけで得られるから、簡単であり、コストの増加をきたさずにすむ。
【0033】
なお、上述した一実施形態は、本発明をセンターピラーリンフォースに適用したが、センターピラーアウタ部分だけを成形したセンタピラーアウタパネル部品に本発明の不等厚構造を採用してもよい。
【0034】
【発明の効果】
以上説明したように請求項1に記載の発明によれば、不等厚センターピラー部材は、ルーフ側に板厚の厚い板材を配置、サイドシール側に板厚の薄い板材を配置し、さらに両板材を溶接する接合線を、高い荷重が作用するストライカ取付位置を避けた断面が一定なストライカ用凹陥部が有る地点に定めたので、溶接部分に亀裂が発生しにくい信頼性、品質に優れた部材で、ルーフ側、サイドシル側に応じた有効なピラー強度を確保できる。
【0035】
請求項2に記載の発明によれば、さらに上記効果に加え、ストライカ用凹陥部の角部が歪みの要因となる材料の上下方向の流動を抑止するので、上下方向の伸びが少なく、亀裂が発生しにくく、一層、品質に優れた不等厚センターピラー部材を提供できるといった効果を奏する。
【図面の簡単な説明】
【図1】本発明の一実施形態に係る不等厚センターピラーリンフォースを、同リンフォースをセンタピラーアウタ部分に組み込む構造と共に示す斜視図。
【図2】図1中のA−Aに沿う不等厚センターピラーリンフォースがセンタピラーアウタ部分に組み込む途中を示す断面図。
【図3】同不等厚センターピラーリンフォースがセンタピラーアウタ部分に組み込まれたときの状態を示す断面図。
【符号の説明】
4…センターピラーアウタ部分
8…ストライカ
10…不等厚センターピラーリンフォース(不等厚センターピラー部材)
11…板材(第1板材)
12…板材(第2板材)
13…接合線(溶接部分)
14…ブランク部材
16…ルーフ側接続部(第1接続部)
17…サイドシル側接続部(第2接続部)
18…柱部
19…ストライカ用凹陥部
19a…底面
19b…下側角部。
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an unequal-thickness center pillar member used to partition a vehicle entrance into a front side and a rear side.
[0002]
[Prior art]
In automobiles, panel parts called side panels are used, which are formed by molding the outer panel part of each part of the vehicle body side such as the roof side rail outer part, front pillar outer part, center pillar outer part and side sill outer part from a single panel, Assembling the body has been done.
[0003]
By the way, since the center pillar is disposed at the center of the entrance opening to the vehicle compartment, it is required to have a strength for protecting the vehicle compartment from a collision force applied from the outside, particularly for ensuring safety.
[0004]
However, since the side panel is a panel structure in which each part (outer panel part) is formed by press-forming a metal panel having the same thickness, it is difficult to increase the strength of only the center pillar outer part. It is difficult to secure the strength.
[0005]
Therefore, in the side panel, a center pillar reinforcement having substantially the same shape as the shape of the center pillar outer portion is fitted inside the pillar portion of the center pillar outer portion having a hat-shaped cross section along the inner surface of the pillar portion. Attachment is performed by welding, and only the strength of the center pillar outer portion is reinforced to improve collision safety.
[0006]
Conventionally, for such a center pillar reinforce, a panel member formed by pressing a metal panel having a predetermined thickness determined by selecting a portion requiring the most strength and forming a shape to be combined with the center pillar outer portion is used. Specifically, the center pillar reinforcement has a T-shaped roof-side connection portion that can be joined to the roof side at the upper end so that it has the same shape as the center pillar outer portion, and a side sill at the lower end. It has a connectable inverted T-shaped side sill side connection part, and has a hat-shaped cross section that bends into the vehicle interior from the middle to the roof side connection between these two parts. A panel structure having a striker recess formed by recessing one side wall of the pillar into the pillar is adopted. The pillar is inserted into the center pillar outer part and is fixed to the inner surface of the outer part by welding, so that the entire center pillar outer from the roof side connection part to the side sill side connection part is reinforced. Perform
[0007]
By the way, as is well known, the outer shape of the center pillar outer portion on the roof side is narrow to secure the area of the door window as much as possible, and the outer shape on the side sill side is for storing the retractor of the seat belt device. The center pillar reinforcement has a thin T-shaped profile on the roof side and a thick inverted T-shaped profile on the side sill side so that it fits inside the center pillar outer part. It is.
[0008]
However, when the center pillar outer part with the same thickness is combined with the center pillar outer part where the section modulus on the upper side is low and the section coefficient on the lower side is large, the upper part of the center pillar outer part is reinforced to the desired strength. However, in the lower part of the center pillar outer part, the difference in the section modulus between the upper part and the lower part of the outer part is excessively reinforced.
[0009]
For this reason, the weight of the reinforced center pillar outer portion tends to be excessive, and the body weight of the automobile may be unnecessarily increased.
[0010]
Therefore, as disclosed in Japanese Utility Model Application Laid-Open No. 3-60873 and Japanese Patent Application Laid-Open No. 6-218540, a blank member in which ends of sheet materials having different thicknesses are joined by continuous continuous welding (mash seam welding). Using the technology of press forming the blank member, the thickness of the upper side with the roof side connection part with a low section modulus is increased, and the lower side thickness with the side sill side connection part with a high section coefficient is increased. Forming a thinned unequal thickness center pillar reinforcement (corresponding to a center pillar member) and combining the unequal thickness center pillar reinforcement with the center pillar outer part ensures that the desired strength is obtained in the entire outer part. It can be considered.
[0011]
The use of the center pillar reinforce formed from a blank member in which plate members having different thicknesses are joined has the advantages of not only reducing the weight but also improving the material yield (material removal).
[0012]
[Problems to be solved by the invention]
By the way, the portion where the plate material is welded is likely to extend in the horizontal direction along the joining line, but is unlikely to extend in a direction perpendicular to the joining line, that is, in the vertical direction.
[0013]
However, the center pillar reinforce, which is press-formed from a blank member, is formed not only by extending laterally from the panel like a hat-shaped cross section, but also by extending vertically such as a pillar portion bent into the vehicle interior. There are many parts.
[0014]
For this reason, if a center pillar reinforce formed by a blank member is adopted, there is a possibility that a crack may be generated in a welded portion after forming due to vertical elongation in press forming, and a center pillar excellent in reliability and quality is obtained. Reinforce may not be obtained.
[0015]
This is the same for the center pillar outer panel component formed only of the center pillar outer.
[0016]
The technique of forming the center pillar member from such a blank member is excellent in the weight and cost as described above, and therefore, it is desired to eliminate the distortion of the welded portion in order to take advantage of the advantages.
[0017]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a high-quality member that does not leave distortion in a welded portion, and cannot secure an effective pillar strength corresponding to the roof side and the side sill side. An object of the present invention is to provide an equal thickness center pillar member.
[0018]
[Means for Solving the Problems]
In order to achieve the above object, the unequal thickness center pillar member according to claim 1 is characterized in that a welding line of a blank member formed by welding ends of plate members having different thicknesses is welded to the center pillar member. While forming the pillar of the main body part, it is a pillar part with a striker recess with a uniform cross section, and passes through the bottom of the recess, avoiding the mounting position where the striker that acts with high load is attached The structure is set at a position crossing the column.
[0019]
As a result, an unequal thickness center pillar member in which cracks are less likely to occur in the welded portion is obtained. In addition, a thick plate is placed on the roof side where strength is required, and a thin plate is placed on the side seal side where low strength is required. An effective pillar strength can be obtained by using the member.
[0020]
According to the unequal thickness center pillar member described in claim 2, in addition to the above object, the welding joint line is formed by the striker recess so that the vertical flow (elongation) of the material that causes distortion is suppressed. By setting the position to pass near the lower corner portion and cross the column portion, a higher quality unequal thickness center pillar member can be obtained.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described based on one embodiment shown in FIGS.
[0022]
1 indicates a part of a body structure of a passenger car (automobile), for example, a side panel. In the side panel 1, for example, an outer panel portion such as a front pillar outer portion 2, a roof side outer portion 3, a center pillar outer portion 4, a side sill outer portion 5, and the like are formed from a single (same thickness) panel.
[0023]
The center pillar outer portion 4 that defines the center of the entrance 6 is narrow at the upper end on the roof side to secure a door window area, and the lower end on the side sill side stores a retractor (not shown) of the seat belt device. It is formed from a pillar 4a having a hat-shaped cross section. Among the side walls of the column 4 facing each other, a concave portion 7 is formed on the middle side wall 4b on the front side (shown in FIGS. 2 and 3) so as to be depressed inwardly of the column. The column portion 4c narrowed by the concave portion 7 is a portion extending straight in the vertical direction without any change in the cross-sectional area, and a latch (not shown) mounted on the front door on the bottom surface of the concave portion 7 ) Is attached.
[0024]
On the other hand, reference numeral 10 denotes an uneven thickness center pillar reinforcement (corresponding to an uneven thickness center pillar member) for reinforcing the center pillar outer portion 4.
[0025]
In the main body 10a of the center pillar reinforce 10, the ends of two plates 11, 12 (corresponding to the first plate and the second plate) having different thicknesses as shown in FIG. A technique is used in which a blank member 14 joined in a laterally continuous manner by welding is prepared and press-formed to form a panel structure having the same shape as the center pillar outer portion 4.
[0026]
More specifically, the blank member 14 is made of a T-shaped plate member 11 (for example, having a plate thickness t1 of 1.2 mm), which is made of material according to the pillar shape from the center of the center pillar outer portion 4 to the upper end on the roof side. ) Is disposed on the upper side, and a thin T-shaped inverted-T-shaped plate material 12 (for example, a plate thickness t2 of 0.9 mm) is taken out according to the pillar shape from the center of the center pillar outer portion 4 to the lower end on the side sill side. ) Is arranged on the lower side, and the lower end of the plate 11 and the upper end of the plate 12 are joined by mash seam welding (t1> t2). Then, the blank member 14 is subjected to press forming to form an unequal thickness center pillar reinforcement 10 that can be fitted into the center pillar outer portion 4. More specifically, the unequal thickness center pillar reinforce 10 has a small-diameter T-shaped roof side connection portion 16 (corresponding to a first connection portion) that can be joined to the roof side at the upper end, and a side sill at the lower end. has a side-sill-side connecting portion 17 inverted T-shaped of connectable large diameter (corresponding to the second connecting portion) and the roof side from the middle connecting the connection unit 1 6,17 between these connecting portions 16 and 17 It has a pillar portion 18 having a hat-shaped cross section that bends into the vehicle interior toward the connecting portion 16, and a part of the front side wall 18 a is recessed into the pillar portion in the middle of the pillar portion 18, following the recess portion 7. It is formed to have a striker recessed portion 19.
[0027]
Then, as shown in FIGS. 2 and 3, the pillar portion 18 is inserted through the opening of the center pillar outer portion 4. In addition, the flanges 4c and 18b at the opening edges of the overlapping columns 4a and column 18 are welded to each other.
[0028]
As a result, the center pillar reinforcement 10 is fixed to the entire inner surface of the center pillar outer portion 4, and the roof side X of the center pillar outer portion 4 having a low section modulus is reinforced by a thick portion, and the center pillar having a high section modulus is strengthened. The side sill side Y of the outer portion 5 is reinforced by a thin portion, and the entire center pillar outer portion 5 from the roof side to the side sill side is reinforced so as to have a desired strength.
[0029]
At this time, the welding joint line 13 formed by the plate material 11 and the plate material 12 of the unequal thickness center pillar reinforce 10, that is, the welded portion passes through the bottom surface 19 a of the striker recess 19 as shown in FIG. 1. It is formed in the position. That is, the joining line 13 of the blank member 14 is positioned at a position such that it passes through the bottom surface avoiding the mounting position where the striker 8 acting with a high load is attached and crosses the pillar portion 18c narrowed by the striker recess 19. More specifically, the joining line 13 is formed at a position passing through the vicinity of the lower corner portion 19b (R end) formed by the striker recess 19 and crossing the column portion 18c.
[0030]
Here, the middle pillar portion 18c in which the striker recess 19 is formed has a small change in the cross-sectional shape in the vertical direction, that is, when press forming is performed, the material expands in the horizontal direction, but the material expands in the horizontal direction. Since a hat-shaped section having a constant cross-section that does not require material elongation is formed, the joining line 13 is defined at a position passing through the bottom surface 19a of the striker recess 19 and crossing the column portion 18c. In addition, cracks due to press forming are less likely to occur in the welded portion (joining line 13).
[0031]
Therefore, not only can an effective pillar strength corresponding to the roof side and the side sill side be obtained, but also an uneven thickness center pillar reinforce 10 excellent in reliability and quality in which cracks in a welded portion are suppressed can be provided. In particular, by setting the joining line 13 so as to pass near the lower corner portion 19b, the vertical flow (elongation) of the material causing distortion at the same corner portion is suppressed. The center pillar reinforce 10 of high quality having a low elongation and a high quality that does not easily generate cracks can be provided.
[0032]
In addition, since the same effect can be obtained only by setting the joining line 13 without requiring a separate structure, the effect is simple and the cost does not increase.
[0033]
In the above-described embodiment, the present invention is applied to the center pillar reinforcement. However, the unequal thickness structure of the present invention may be applied to a center pillar outer panel component in which only the center pillar outer portion is formed.
[0034]
【The invention's effect】
As described above, according to the first aspect of the present invention, the unequal thickness center pillar member has a thick plate material disposed on the roof side and a thin plate material disposed on the side seal side. Since the joint line for welding the plate material is set at the point where there is a striker recess with a constant cross section that avoids the striker mounting position where a high load acts, reliability and quality that prevent cracks from occurring in the welded part are excellent. With the members, an effective pillar strength corresponding to the roof side and the side sill side can be secured.
[0035]
According to the second aspect of the present invention, in addition to the above effects, the corners of the striker recess suppress the vertical flow of the material that causes distortion, so that the vertical expansion is small, and the cracks are reduced. This is advantageous in that an unequal thickness center pillar member which is less likely to be generated and which is more excellent in quality can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an unequal thickness center pillar reinforce according to an embodiment of the present invention, together with a structure in which the reinforce is incorporated into a center pillar outer part.
FIG. 2 is a cross-sectional view illustrating a state where the unequal thickness center pillar reinforcement along the line AA in FIG. 1 is being assembled into a center pillar outer portion.
FIG. 3 is a cross-sectional view showing a state in which the unequal thickness center pillar reinforcement is incorporated into a center pillar outer part.
[Explanation of symbols]
4 center pillar outer part 8 striker 10 unequal thickness center pillar reinforcement (unequal thickness center pillar member)
11: Plate material (first plate material)
12 ... plate material (second plate material)
13 ... joining line (welded part)
14 blank member 16 roof connection part (first connection part)
17 ... side sill side connection part (second connection part)
18 ... pillar part 19 ... concave part 19a for striker ... bottom face 19b ... lower corner.

Claims (2)

上側に配置される第1板材と下側に配置される前記第1板材より板厚が薄い第2板材との端部同士を連続する溶接で接合してなるブランク部材にプレス成形を施して形成された、上端部にルーフサイドと接合可能な第1接続部を有し、下端部にサイドシルと接合可能な第2接続部を有する断面ハット形の柱部と、
前記柱部の中段の対向する側壁のうちの一方の側壁に形成され、該壁部分を柱部内部へ凹陥させてなるストライカ用凹陥部とを有し、
前記溶接の接合線が、前記ストライカが取付く取付位置を避けた前記ストライカ用凹陥部の底面を通る断面が一定な柱部分を横切る位置に形成されるようにした
ことを特徴とする不等厚センターピラー部材。
Press forming is performed on a blank member formed by joining the ends of a first plate member disposed on the upper side and a second plate member having a smaller thickness than the first plate member disposed on the lower side by continuous welding. been, has a first connecting portion capable of bonding with the roof side to the upper part, and the bar portion of the cross-sectional hat-shaped to have a second connecting portion capable of joining the side sill to the lower end,
A striker recess formed on one of the opposed side walls in the middle of the pillar portion, wherein the wall portion is recessed into the pillar portion;
Unequal to said joining line of the weld, characterized in that the striker has to Ru through the bottom surface of the striker for recess avoiding the attachment rather attachment position cross section is formed at a position across a certain pillar portion Thick center pillar member.
前記溶接の接合線は、前記ストライカ用凹陥部をなす下側角部の近くを通過して前記柱部を横切る位置に形成されることを特徴とする請求項1に記載の不等厚センターピラー部材。The unequal thickness center pillar according to claim 1, wherein the welding joint line is formed at a position passing near a lower corner portion forming the striker recess and crossing the pillar portion. Element.
JP36351098A 1998-12-21 1998-12-21 Unequal thickness center pillar members Expired - Lifetime JP3567772B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP36351098A JP3567772B2 (en) 1998-12-21 1998-12-21 Unequal thickness center pillar members

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000272536A (en) * 1999-03-26 2000-10-03 Unipres Corp Body member for automobile
KR100487670B1 (en) * 2002-06-27 2005-05-03 지엠대우오토앤테크놀로지주식회사 reinforcement panel of center pillar for vehicles
JP4502262B2 (en) * 2004-11-25 2010-07-14 ダイハツ工業株式会社 Car body side structure
JP2006290224A (en) * 2005-04-13 2006-10-26 Toyota Motor Corp Vehicle body front part structure
SE530228C2 (en) * 2006-08-25 2008-04-01 Gestamp Hardtech Ab Ways to heat mold and harden a plate detail, as well as a B-pillar for a vehicle
JP2011255413A (en) 2010-06-11 2011-12-22 Toyoda Iron Works Co Ltd Device for heating steel sheet, method for manufacturing press-formed article, and press-formed article
CN102407881A (en) * 2011-10-28 2012-04-11 重庆长安汽车股份有限公司 Hinge reinforcing plate of central pillar of gusset
ES2693544T3 (en) * 2014-02-04 2018-12-12 Nippon Steel & Sumitomo Metal Corporation Component of the car frame and lower front pillar that includes the same

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