WO2019009323A1 - Vehicle body structure member - Google Patents
Vehicle body structure member Download PDFInfo
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- WO2019009323A1 WO2019009323A1 PCT/JP2018/025331 JP2018025331W WO2019009323A1 WO 2019009323 A1 WO2019009323 A1 WO 2019009323A1 JP 2018025331 W JP2018025331 W JP 2018025331W WO 2019009323 A1 WO2019009323 A1 WO 2019009323A1
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- WIPO (PCT)
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- steel plate
- closed cross
- vehicle body
- vertical wall
- flange
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/04—Door pillars ; windshield pillars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
Definitions
- the present invention relates to a vehicle body structural member provided with a closed cross sectional structure such as a center pillar.
- the entire flange portion including the welded portion is irradiated with a laser beam to be heated, and processing for eliminating local softening is performed (see JP-A-2015-171731). ).
- the heat transfer path extension is a bend formed in the flange.
- the bent portion protrudes in a direction away from a steel plate member other than the first steel plate member.
- a bending part not to affect joint strength in a flange of each steel plate member by the above-mentioned composition.
- heat transfer can be suppressed with respect to the closed-section formation site
- FIG. 2 shows the reinforcing material of the vehicle center pillar in 1st Embodiment of this invention. It is sectional drawing in the II-II line of the reinforcing material of FIG. It is a graph for demonstrating the effect by the reinforcing material of the said 1st Embodiment. It is sectional drawing similar to FIG. 2 which shows the reinforcing material of the vehicle center pillar in 2nd Embodiment of this invention. It is sectional drawing similar to FIG. 2 which shows the reinforcing material of the vehicle center pillar in 3rd Embodiment of this invention. It is sectional drawing similar to FIG. 2 which shows the reinforcing material of the vehicle center pillar in 4th Embodiment of this invention. It is sectional drawing similar to FIG. 2 which shows the reinforcing material of the vehicle center pillar in 5th Embodiment of this invention.
- First Embodiment 1 and 2 show a reinforcing member of a vehicle center pillar which is one of the components of a vehicle body structure according to a first embodiment of the present invention.
- each direction with respect to the vehicle body at the time of vehicle mounting of the reinforcing material of a vehicle center pillar is shown by the arrow.
- the description of the direction will be made based on this direction.
- the reinforcing material of the vehicle center pillar has a closed cross-sectional structure, and can be formed of, for example, two steel plate members of an outer reinforcement 10 and an inner reinforcement 20. In the reinforcing member, one internal space 30 is formed by this closed cross-sectional structure.
- the outer reinforcement 10 is a steel plate member formed and hardened at the same time by hot stamping, and is generally formed in a hat cross-sectional shape and includes a martensitic structure.
- the outer reinforcement 10 is provided with a pair of first vertical wall portions 11 which respectively rise outward from the flange portions 13 on both the front and rear sides as a closed cross section forming portion, and a first protrusion connecting the outer ends of the first vertical wall portions 11
- the wall 12 is provided.
- the inner reinforcement 20 is a high tensile steel plate formed by a normal temperature press, and is face-joined and joined to the flange portion 13 of the outer reinforcement 10 at the flange portions 23 on both the front and rear sides.
- the inner reinforcement 20 has a pair of second vertical wall portions 21 rising inward from both flange portions 23 and a second protruding wall portion 22 projecting inward on both sides adjacent to both flange portions 23 as a closed cross section forming portion. And contains.
- the pair of first vertical wall portions 11 of the outer reinforcement 10 and the pair of second vertical wall portions 21 of the inner reinforcement 20 are bent in directions away from each other with respect to the respective flange portions 13 and 23.
- the one vertical wall portion 11 and the pair of second vertical wall portions 21 are disposed to face each other at the bent portions 11a and 21a.
- each weld is irradiated with the laser beam LB and heat treatment is performed.
- the irradiation range at this time is set so as not to enter the first vertical wall portion 11 side from the bending portion 14. Therefore, it is difficult for the heat due to the heat treatment to reach the first vertical wall portion 11 ahead of the bending portion 14, and the first vertical wall portion 11 can be suppressed from being softened.
- graph C in FIG. 3 shows the case where the laser beam LB was irradiated for HAZ softening, and the strength in the case where the bending portion 14 is not provided. At this time, the heat generated by the laser beam LB is transmitted to the first vertical wall portion 11 and the first vertical wall portion 11 is softened, so the load resistance L3 of the closed cross-sectional structure is significantly reduced compared to L1 described above.
- FIG. 4 shows a cross section of the reinforcing material of the center pillar in the second embodiment of the present invention.
- the second embodiment is different from the first embodiment in that in the first embodiment, the flange portion 13 of the outer reinforcement 10 is provided with the bent portion 14, but in the second embodiment, the flange portion of the inner reinforcement 20 The point 23 is also provided with the bending portion 24.
- the other configurations can be the same as those of the above-described embodiment, and thus the description thereof will not be repeated.
- the bending portion 24 provided in the flange portion 23 of the inner reinforcement 20 is formed symmetrically with respect to the bending portion 14 provided in the flange portion 13 of the outer reinforcement 10. That is, while the bending portion 14 is formed by projecting a part of the steel material forming the flange portion 13 to the outside, the bending portion 24 is formed by projecting a part of the steel material forming the flange portion 23 to the inside .
- the bending portion 24 is also provided in addition to the bending portion 14. Therefore, in addition to the fact that the heat from the laser beam LB irradiation is transmitted to the first vertical wall portion 11 is suppressed by the bending portion 14, the heat from the laser beam LB irradiation is transmitted to the second vertical wall portion 21 is a bending portion It is suppressed by 24. Therefore, the softening of the first vertical wall portion 11 and the second vertical wall portion 21 is suppressed, and the strength against the external load of the closed cross-section structure by the outer reinforcement 10 and the inner reinforcement 20 can be further enhanced.
- the heat transmitted by the laser beam LB irradiation to the first vertical wall portion 11 is suppressed by the bending portion 15. Therefore, the softening of the first vertical wall portion 11 is suppressed, and the strength against the external load of the closed cross-sectional structure by the outer reinforcement 10 and the inner reinforcement 20 can be enhanced.
- FIG. 7 shows a cross section of the reinforcing material of the center pillar in the fifth embodiment of the present invention.
- the fifth embodiment is different from the fourth embodiment (see FIG. 6) in that, in the fourth embodiment, the bending portion 15 is formed by bending a portion of the steel material of the flange portion 13 inward. In 5 embodiment, it is a point which the bending part 16 bent and formed a part of steel materials of the flange part 13 both outside and inside.
- the other configurations can be the same as those of the above-described embodiment, and thus the description thereof will not be repeated.
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- Chemical & Material Sciences (AREA)
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- Body Structure For Vehicles (AREA)
Abstract
This vehicle body structure member is provided with a plurality of steel plate members (10, 20) having closed cross-section forming portions (11, 21) and also having flange sections (13, 23) at the opposite ends of the closed cross-section forming portions (11, 21). The flange sections (13, 23) of the steel plate members are welded face-to-face, and a closed cross-section is formed by the closed cross-section forming portions (11, 21). A first steel plate member (10) of the plurality of steel plate members (10, 20) contains a martensite structure. Heat transmission path extension bodies (14) for extending the length of the heat transmission paths between the flange sections (13) of the first steel plate member (10) and the closed cross-section forming portions (11) of the first steel plate member (10) are provided on the closed cross-section forming portion side of the flange sections (13) of the first steel plate member (10).
Description
本発明は、センタピラーの如き閉断面構造を備える車両ボデー構造部材に関する。
The present invention relates to a vehicle body structural member provided with a closed cross sectional structure such as a center pillar.
車両ボデー構造部材における閉断面構造は、２枚の鋼板部材が閉断面を成すように組み合わされ、その両側のフランジ部が溶接されて形成されるものが多い。２枚の鋼板部材の少なくとも一方が焼入れにより高強度化されてマルテンサイト組織を含んでいる場合、溶接部位の熱影響部（以下、ＨＡＺという）で局部的な軟化（以下、ＨＡＺ軟化という）が生じることがある。このようなＨＡＺ軟化が生じると、軟化した部位に応力集中が生じやすくなる。
The closed cross-sectional structure of the vehicle body structural member is often formed by combining two steel plate members so as to form a closed cross-section, and welding the flanges on both sides thereof. When at least one of the two steel plate members is hardened by quenching and contains a martensitic structure, the locally softened (hereinafter referred to as HAZ softened) in the heat-affected zone (hereinafter referred to as HAZ) of the welded portion May occur. When such HAZ softening occurs, stress concentration tends to occur at the softened portion.
そこで、このような局部的な軟化をなくすため、溶接部位を含むフランジ部全体にレーザービームを照射して加熱し、局部軟化を解消する処理が行われている（特開２０１５－１７１７３１号公報参照）。
Therefore, in order to eliminate such local softening, the entire flange portion including the welded portion is irradiated with a laser beam to be heated, and processing for eliminating local softening is performed (see JP-A-2015-171731). ).
しかし、上記のようなフランジ部の加熱処理は、加熱がフランジ部にとどまらず閉断面を形成する部位にも影響を与えることがあり、その場合、閉断面構造体としての強度が低下する問題が生じる。
However, the heat treatment of the flange portion as described above may affect the portion where the heating does not stop at the flange portion and forms a closed cross section, and in that case, there is a problem that the strength as the closed cross section structure decreases. It occurs.
したがって、閉断面構造体の基本構造を変えることなくフランジ部の加熱処理により閉断面構造体の強度が低下する問題を抑制することが望ましい。
Therefore, it is desirable to suppress the problem that the strength of the closed cross-section structure is reduced by the heat treatment of the flange without changing the basic structure of the closed cross-section structure.
本発明のひとつの側面は車両ボデー構造部材であって、閉断面形成部位とその両端にフランジ部とを有する複数の鋼板部材を備え、これらの鋼板部材のフランジ部同士が面合わせにて溶接されて、閉断面形成部位で閉断面が形成されている。前記複数の鋼板部材のうちの第一の鋼板部材がマルテンサイト組織を含んでおり、前記第一の鋼板部材の前記フランジ部と閉断面形成部位との間の伝熱経路を長くする伝熱経路延長体を前記第一の鋼板部材のフランジ部の前記閉断面形成部位側に備える。
One aspect of the present invention is a vehicle body structural member including a plurality of steel plate members having a closed cross section forming portion and flange portions at both ends, and the flange portions of these steel plate members are welded face to face Thus, the closed cross section is formed at the closed cross section forming portion. A heat transfer path which lengthens a heat transfer path between the flange portion of the first steel plate member and a closed cross section forming portion, wherein the first steel plate member of the plurality of steel plate members includes a martensitic structure. An extension body is provided on the side of the closed cross section forming portion of the flange portion of the first steel plate member.
実施形態によっては、上記の構成によりフランジ部を熱処理した際の熱の影響により閉断面形成部位が軟化するのを抑制することができる。
Depending on embodiment, it can suppress that a closed cross section formation site softens under the influence of the heat at the time of heat-treating a flange by the above-mentioned composition.
実施形態によっては、前記伝熱経路延長体は前記フランジ部に形成された屈曲部である。
In some embodiments, the heat transfer path extension is a bend formed in the flange.
実施形態によっては、上記の構成により車両ボデー構造部材の生産性を悪化させないで伝熱経路延長体を形成することができる。
In some embodiments, the above configuration allows the heat transfer path extension to be formed without deteriorating the productivity of the vehicle body structural member.
実施形態によっては、前記各鋼板部材の前記閉断面形成部位は前記フランジ部に対して互いに遠ざかる方向に折り曲げられた縦壁部をそれぞれ備えており、前記各縦壁部は前記折り曲げ部で互いに対向配置されているとともに、前記屈曲部は前記フランジ部の前記縦壁部側に形成されている。
In some embodiments, the closed cross section forming portions of the respective steel plate members each include vertical wall portions bent in a direction away from each other with respect to the flange portion, and the vertical wall portions face each other at the bent portions. While being arrange | positioned, the said bending part is formed in the said vertical wall part side of the said flange part.
実施形態によっては、上記の構成により屈曲部を設けたことによる車両ボデー構造部材の強度への影響を最小限にすることができる。
In some embodiments, the above-described configuration can minimize the influence on the strength of the vehicle body structural member by providing the bending portion.
実施形態によっては、前記屈曲部は前記第一の鋼板部材以外の鋼板部材から離間する方向に突出している。
In some embodiments, the bent portion protrudes in a direction away from a steel plate member other than the first steel plate member.
実施形態によっては、上記の構成により屈曲部が各鋼板部材のフランジ部における接合強度に影響を与えないようにすることができる。
Depending on embodiment, it can be made for a bending part not to affect joint strength in a flange of each steel plate member by the above-mentioned composition.
実施形態によっては、前記第一の鋼板部材以外の各鋼板部材にも伝熱経路延長体としての屈曲部がそれぞれ設けられている。
Depending on embodiment, the bending part as a heat transfer path extension body is each provided also in each steel plate member other than the said 1st steel plate member.
実施形態によっては、上記の構成により各鋼板部材の閉断面形成部位に対して伝熱を抑制することができる。
Depending on embodiment, heat transfer can be suppressed with respect to the closed-section formation site | part of each steel plate member by said structure.
＜第１実施形態＞
図１、２は、本発明の第１実施形態として、車両ボデー構造の構成要素の一つである車両センタピラーの補強材を示す。各図において、車両センタピラーの補強材の車体搭載時における車体に対する各方向を矢印により示す。以下の説明において、方向に関する記述は、この方向を基準として行うものとする。 First Embodiment
1 and 2 show a reinforcing member of a vehicle center pillar which is one of the components of a vehicle body structure according to a first embodiment of the present invention. In each figure, each direction with respect to the vehicle body at the time of vehicle mounting of the reinforcing material of a vehicle center pillar is shown by the arrow. In the following description, the description of the direction will be made based on this direction.
図１、２は、本発明の第１実施形態として、車両ボデー構造の構成要素の一つである車両センタピラーの補強材を示す。各図において、車両センタピラーの補強材の車体搭載時における車体に対する各方向を矢印により示す。以下の説明において、方向に関する記述は、この方向を基準として行うものとする。 First Embodiment
1 and 2 show a reinforcing member of a vehicle center pillar which is one of the components of a vehicle body structure according to a first embodiment of the present invention. In each figure, each direction with respect to the vehicle body at the time of vehicle mounting of the reinforcing material of a vehicle center pillar is shown by the arrow. In the following description, the description of the direction will be made based on this direction.
車両センタピラーの補強材は閉断面構造を備えており、例えばアウタリインフォースメント１０とインナリインフォースメント２０の二つの鋼板部材で構成することができる。補強材にはこの閉断面構造により一つの内部空間３０が形成されている。アウタリインフォースメント１０は、ホットスタンプにより成形と同時に焼き入れされた鋼板部材であり、概ねハット断面形状に形成されているとともにマルテンサイト組織を含んでいる。アウタリインフォースメント１０は、閉断面形成部位として、前後両側のフランジ部１３からそれぞれ外側に立ち上がる一対の第１縦壁部１１を備え、各第１縦壁部１１の外側端同士をつなぐ第１突出壁部１２を備える。
The reinforcing material of the vehicle center pillar has a closed cross-sectional structure, and can be formed of, for example, two steel plate members of an outer reinforcement 10 and an inner reinforcement 20. In the reinforcing member, one internal space 30 is formed by this closed cross-sectional structure. The outer reinforcement 10 is a steel plate member formed and hardened at the same time by hot stamping, and is generally formed in a hat cross-sectional shape and includes a martensitic structure. The outer reinforcement 10 is provided with a pair of first vertical wall portions 11 which respectively rise outward from the flange portions 13 on both the front and rear sides as a closed cross section forming portion, and a first protrusion connecting the outer ends of the first vertical wall portions 11 The wall 12 is provided.
インナリインフォースメント２０は、常温プレスにより成形された高張力鋼板であり、前後両側のフランジ部２３において、アウタリインフォースメント１０のフランジ部１３に面合わせ接合されている。インナリインフォースメント２０は、閉断面形成部位として、両フランジ部２３から内側に立ち上がる一対の第２縦壁部２１と、両フランジ部２３側に隣接する両側で内側に突出した第２突出壁部２２とを含んでいる。フランジ部１３、２３における接合は、スポット溶接により行われている。各図中、×印により溶接個所を示している。なお、この接合は、レーザー溶接（例えばレーザー・スクリュー・ウェルディング＝ＬＳＷ）など他の溶接により行われてもよい。
The inner reinforcement 20 is a high tensile steel plate formed by a normal temperature press, and is face-joined and joined to the flange portion 13 of the outer reinforcement 10 at the flange portions 23 on both the front and rear sides. The inner reinforcement 20 has a pair of second vertical wall portions 21 rising inward from both flange portions 23 and a second protruding wall portion 22 projecting inward on both sides adjacent to both flange portions 23 as a closed cross section forming portion. And contains. Joining at the flanges 13 and 23 is performed by spot welding. In each figure, a weld mark is shown by the mark x. Note that this bonding may be performed by other welding such as laser welding (for example, laser screw welding = LSW).
アウタリインフォースメント１０の一対の第１縦壁部１１とインナリインフォースメント２０の一対の第２縦壁部２１は、各フランジ部１３、２３に対して互いに遠ざかる方向に折り曲げられており、一対の第１縦壁部１１と一対の第２縦壁部２１は、折り曲げ部１１ａ、２１ａで互いに対向配置されている。
The pair of first vertical wall portions 11 of the outer reinforcement 10 and the pair of second vertical wall portions 21 of the inner reinforcement 20 are bent in directions away from each other with respect to the respective flange portions 13 and 23. The one vertical wall portion 11 and the pair of second vertical wall portions 21 are disposed to face each other at the bent portions 11a and 21a.
アウタリインフォースメント１０の前後両側のフランジ部１３において、溶接個所より第１縦壁部１１側には屈曲部１４が形成されている。屈曲部１４は、フランジ部１３の鋼板を外側に屈曲変形させて形成されている。屈曲部１４の外側への突出寸法は、第１突出壁部１２のフランジ部１３からの突出寸法が５０～１００ｍｍのとき、例えば２．５ｍｍ程度である。屈曲部１４は、フランジ部１３の加熱処理が行われたとき、その熱が第１縦壁部１１側に伝わるのを抑制するために設けられている。従って、屈曲部１４は伝熱経路延長体として機能する。
In the flange portions 13 on the front and rear sides of the outer reinforcement 10, a bent portion 14 is formed on the side of the first vertical wall portion 11 from the welding portion. The bending portion 14 is formed by bending and deforming the steel plate of the flange portion 13 to the outside. The projecting dimension of the bent portion 14 to the outside is, for example, about 2.5 mm when the projecting dimension of the first projecting wall portion 12 from the flange portion 13 is 50 to 100 mm. The bending portion 14 is provided to suppress heat transfer to the first vertical wall portion 11 side when the flange portion 13 is heated. Therefore, the bending portion 14 functions as a heat transfer path extension.
各フランジ部１３、２３の溶接が行われると、溶接ナゲットの周りでＨＡＺ軟化が生じる。その対策として、図２のように、各溶接部にはレーザービームＬＢが照射され、加熱処理が行われる。このときの照射範囲は、屈曲部１４より第１縦壁部１１側に入らないように設定する。そのため、加熱処理による熱は、屈曲部１４より先の第１縦壁部１１へは届き難く、第１縦壁部１１が軟化されるのを抑制することができる。即ち、レーザービームＬＢによるフランジ部１３上の直接的な加熱領域と第１縦壁部１１との間には屈曲部１４があって両者間の伝熱経路が長くされるため、フランジ部１３の熱は第１縦壁部１１に伝わり難くなる。
When welding of each flange portion 13, 23 occurs, HAZ softening occurs around the welding nugget. As a countermeasure, as shown in FIG. 2, each weld is irradiated with the laser beam LB and heat treatment is performed. The irradiation range at this time is set so as not to enter the first vertical wall portion 11 side from the bending portion 14. Therefore, it is difficult for the heat due to the heat treatment to reach the first vertical wall portion 11 ahead of the bending portion 14, and the first vertical wall portion 11 can be suppressed from being softened. That is, since there is a bending portion 14 between the direct heating region on the flange portion 13 by the laser beam LB and the first vertical wall portion 11 and the heat transfer path between the two is elongated, Heat is less likely to be transmitted to the first vertical wall portion 11.
図３は、アウタリインフォースメント１０とインナリインフォースメント２０とによる閉断面構造の外部荷重に対する強度を示している。図中のグラフＡは、ＨＡＺ軟化が生じた状態でレーザービームＬＢが照射されなかった場合の強度を示す。この場合、荷重Ｌ４の時点でＨＡＺ軟化が生じた部分にクラックが入り、閉断面構造が破壊される。そのため、クラックが入らなければ得られるはずの高い耐荷重Ｌ１が得られない問題がある。
FIG. 3 shows the strength against the external load of the closed cross-section structure by the outer reinforcement 10 and the inner reinforcement 20. Graph A in the figure shows the intensity when the laser beam LB was not irradiated in the state where HAZ softening occurred. In this case, a crack occurs in the portion where HAZ softening occurs at the time of load L4, and the closed cross-sectional structure is broken. Therefore, there is a problem that a high load resistance L1 which can be obtained without a crack can not be obtained.
また、図３のグラフＣは、ＨＡＺ軟化に対してレーザービームＬＢ照射が行われた場合で、屈曲部１４を備えない場合の強度を示す。このとき、レーザービームＬＢ照射による熱が第１縦壁部１１に伝わって、第１縦壁部１１が軟化するため、閉断面構造の耐荷重Ｌ３は上述のＬ１に比べて大きく低下する。
Further, graph C in FIG. 3 shows the case where the laser beam LB was irradiated for HAZ softening, and the strength in the case where the bending portion 14 is not provided. At this time, the heat generated by the laser beam LB is transmitted to the first vertical wall portion 11 and the first vertical wall portion 11 is softened, so the load resistance L3 of the closed cross-sectional structure is significantly reduced compared to L1 described above.
図３のグラフＢは、本実施形態のように、ＨＡＺ軟化に対してレーザービームＬＢ照射が行われた場合で、屈曲部１４を備える場合の強度を示す。このとき、レーザービームＬＢ照射による熱が第１縦壁部１１に伝わるのが屈曲部１４により抑制され、第１縦壁部１１の軟化が防止されるため、閉断面構造の耐荷重Ｌ２は、上述のＬ１より小さいがＬ３より大きくなる。
The graph B in FIG. 3 shows the strength in the case where the bending portion 14 is provided in the case where the laser beam LB irradiation is performed for HAZ softening as in the present embodiment. At this time, the heat transmitted by the laser beam LB is prevented from being transmitted to the first vertical wall portion 11 by the bent portion 14 and the softening of the first vertical wall portion 11 is prevented. It is smaller than L1 described above but larger than L3.
第１実施形態によれば、レーザービームＬＢ照射による熱が第１縦壁部１１に伝わるのが屈曲部１４により抑制される。そのため、第１縦壁部１１の軟化が防止され、アウタリインフォースメント１０とインナリインフォースメント２０とによる閉断面構造の外部荷重に対する強度を、屈曲部１４がなく第１縦壁部１１が軟化した場合に比べて高めることができる。しかも、第１縦壁部１１及び第２縦壁部２１が互いに対向配置され、フランジ部１３の第１縦壁部１１側に屈曲部１４が形成されている。そのため、屈曲部１４を設けたことによる閉断面構造の強度への影響を最小限にすることができる。
According to the first embodiment, the heat transmitted by the laser beam LB to the first vertical wall portion 11 is suppressed by the bending portion 14. Therefore, the softening of the first vertical wall portion 11 is prevented, and the strength against the external load of the closed cross-sectional structure by the outer reinforcement 10 and the inner reinforcement 20 is not softened and the first vertical wall portion 11 is softened. It can be enhanced compared to Moreover, the first vertical wall portion 11 and the second vertical wall portion 21 are disposed to face each other, and the bending portion 14 is formed on the side of the first vertical wall portion 11 of the flange portion 13. Therefore, the influence of the provision of the bending portion 14 on the strength of the closed cross-sectional structure can be minimized.
＜第２実施形態＞
図４は、本発明の第２実施形態におけるセンタピラーの補強材の断面を示す。第２実施形態が第１実施形態と異なる点は、第１実施形態では、アウタリインフォースメント１０のフランジ部１３に屈曲部１４を設けたが、第２実施形態では、インナリインフォースメント２０のフランジ部２３にも屈曲部２４を設けた点である。その他の構成は前述の実施形態と同一にすることができるため、再度の説明は省略する。 Second Embodiment
FIG. 4 shows a cross section of the reinforcing material of the center pillar in the second embodiment of the present invention. The second embodiment is different from the first embodiment in that in the first embodiment, theflange portion 13 of the outer reinforcement 10 is provided with the bent portion 14, but in the second embodiment, the flange portion of the inner reinforcement 20 The point 23 is also provided with the bending portion 24. The other configurations can be the same as those of the above-described embodiment, and thus the description thereof will not be repeated.
図４は、本発明の第２実施形態におけるセンタピラーの補強材の断面を示す。第２実施形態が第１実施形態と異なる点は、第１実施形態では、アウタリインフォースメント１０のフランジ部１３に屈曲部１４を設けたが、第２実施形態では、インナリインフォースメント２０のフランジ部２３にも屈曲部２４を設けた点である。その他の構成は前述の実施形態と同一にすることができるため、再度の説明は省略する。 Second Embodiment
FIG. 4 shows a cross section of the reinforcing material of the center pillar in the second embodiment of the present invention. The second embodiment is different from the first embodiment in that in the first embodiment, the
インナリインフォースメント２０のフランジ部２３に設けた屈曲部２４は、アウタリインフォースメント１０のフランジ部１３に設けた屈曲部１４に対して対称形で形成されている。即ち、屈曲部１４はフランジ部１３を成す鋼材の一部を外側に突出して形成しているのに対し、屈曲部２４はフランジ部２３を成す鋼材の一部を内側に突出して形成している。
The bending portion 24 provided in the flange portion 23 of the inner reinforcement 20 is formed symmetrically with respect to the bending portion 14 provided in the flange portion 13 of the outer reinforcement 10. That is, while the bending portion 14 is formed by projecting a part of the steel material forming the flange portion 13 to the outside, the bending portion 24 is formed by projecting a part of the steel material forming the flange portion 23 to the inside .
第２実施形態によれば、屈曲部１４に加えて屈曲部２４も設けられている。そのため、レーザービームＬＢ照射による熱が第１縦壁部１１に伝わるのが屈曲部１４により抑制されるのに加えて、レーザービームＬＢ照射による熱が第２縦壁部２１に伝わるのが屈曲部２４により抑制される。従って、第１縦壁部１１及び第２縦壁部２１の軟化が抑制され、アウタリインフォースメント１０とインナリインフォースメント２０とによる閉断面構造の外部荷重に対する強度を更に高めることができる。
According to the second embodiment, the bending portion 24 is also provided in addition to the bending portion 14. Therefore, in addition to the fact that the heat from the laser beam LB irradiation is transmitted to the first vertical wall portion 11 is suppressed by the bending portion 14, the heat from the laser beam LB irradiation is transmitted to the second vertical wall portion 21 is a bending portion It is suppressed by 24. Therefore, the softening of the first vertical wall portion 11 and the second vertical wall portion 21 is suppressed, and the strength against the external load of the closed cross-section structure by the outer reinforcement 10 and the inner reinforcement 20 can be further enhanced.
＜第３実施形態＞
図５は、本発明の第３実施形態におけるセンタピラーの補強材の断面を示す。第３実施形態が第２実施形態（図４参照）と異なる点は、第２実施形態では、屈曲部２４と屈曲部１４とが対称形で形成されたのに対し、第３実施形態では、それらを同方向で両者が重なるように形成した点である。その他の構成は前述の実施形態と同一にすることができるため、再度の説明は省略する。 Third Embodiment
FIG. 5 shows a cross section of the reinforcing material of the center pillar in the third embodiment of the present invention. The third embodiment is different from the second embodiment (see FIG. 4) in that in the second embodiment, the bendingportion 24 and the bending portion 14 are formed in a symmetrical shape, while in the third embodiment, They are points formed so as to overlap in the same direction. The other configurations can be the same as those of the above-described embodiment, and thus the description thereof will not be repeated.
図５は、本発明の第３実施形態におけるセンタピラーの補強材の断面を示す。第３実施形態が第２実施形態（図４参照）と異なる点は、第２実施形態では、屈曲部２４と屈曲部１４とが対称形で形成されたのに対し、第３実施形態では、それらを同方向で両者が重なるように形成した点である。その他の構成は前述の実施形態と同一にすることができるため、再度の説明は省略する。 Third Embodiment
FIG. 5 shows a cross section of the reinforcing material of the center pillar in the third embodiment of the present invention. The third embodiment is different from the second embodiment (see FIG. 4) in that in the second embodiment, the bending
アウタリインフォースメント１０のフランジ部１３に設けた屈曲部１４は、第１実施形態及び第２実施形態と同様、フランジ部１３を成す鋼材の一部を外側に突出して形成している。一方、インナリインフォースメント２０のフランジ部２３に設けた屈曲部２５は、フランジ部２３を成す鋼材の一部を屈曲部１４の内側に突出して屈曲形状内で形成している。
The bent portion 14 provided in the flange portion 13 of the outer reinforcement 10 is formed by projecting a part of the steel material forming the flange portion 13 to the outside as in the first and second embodiments. On the other hand, the bending portion 25 provided in the flange portion 23 of the inner reinforcement 20 projects a part of the steel material forming the flange portion 23 to the inside of the bending portion 14 to form a bending shape.
第３実施形態も第２実施形態と同様、レーザービームＬＢ照射による熱が第１縦壁部１１に伝わるのが屈曲部１４により抑制され、また、レーザービームＬＢ照射による熱が第２縦壁部２１に伝わるのが屈曲部２５により抑制される。従って、第１縦壁部１１及び第２縦壁部２１の軟化が抑制され、アウタリインフォースメント１０とインナリインフォースメント２０とによる閉断面構造の外部荷重に対する強度を高めることができる。
Similarly to the second embodiment, in the third embodiment, the transfer of heat by the laser beam LB to the first vertical wall portion 11 is suppressed by the bending portion 14, and the heat by the laser beam LB irradiation is the second vertical wall portion Transmission to 21 is suppressed by the bending portion 25. Therefore, the softening of the first vertical wall portion 11 and the second vertical wall portion 21 is suppressed, and the strength against the external load of the closed cross-sectional structure by the outer reinforcement 10 and the inner reinforcement 20 can be enhanced.
＜第４実施形態＞
図６は、本発明の第４実施形態におけるセンタピラーの補強材の断面を示す。第４実施形態が第１実施形態（図２参照）と異なる点は、第１実施形態では、屈曲部１４がフランジ部１３の鋼材の一部を外側に屈曲して形成したのに対し、第４実施形態では、屈曲部１５がフランジ部１３の鋼材の一部を内側に屈曲して形成した点である。その他の構成は前述の実施形態と同一にすることができるため、再度の説明は省略する。 Fourth Embodiment
FIG. 6 shows a cross section of the reinforcing material of the center pillar in the fourth embodiment of the present invention. The fourth embodiment is different from the first embodiment (see FIG. 2) in that, in the first embodiment, the bendingportion 14 is formed by bending a part of the steel material of the flange portion 13 to the outside. In the fourth embodiment, the bending portion 15 is formed by bending a part of the steel material of the flange portion 13 inward. The other configurations can be the same as those of the above-described embodiment, and thus the description thereof will not be repeated.
図６は、本発明の第４実施形態におけるセンタピラーの補強材の断面を示す。第４実施形態が第１実施形態（図２参照）と異なる点は、第１実施形態では、屈曲部１４がフランジ部１３の鋼材の一部を外側に屈曲して形成したのに対し、第４実施形態では、屈曲部１５がフランジ部１３の鋼材の一部を内側に屈曲して形成した点である。その他の構成は前述の実施形態と同一にすることができるため、再度の説明は省略する。 Fourth Embodiment
FIG. 6 shows a cross section of the reinforcing material of the center pillar in the fourth embodiment of the present invention. The fourth embodiment is different from the first embodiment (see FIG. 2) in that, in the first embodiment, the bending
前後の各屈曲部１５は、各第１縦壁部１１の内側の延長線上に形成されている。そして、前側の屈曲部１５の前側に前側の第２縦壁部２１が設けられ、後側の屈曲部１５の後側に後側の第２縦壁部２１が設けられている。
Each of the front and rear bent portions 15 is formed on an extension of the inside of each first vertical wall portion 11. The front second vertical wall portion 21 is provided on the front side of the front bending portion 15, and the rear second vertical wall portion 21 is provided on the rear side of the rear bending portion 15.
第４実施形態も第１実施形態と同様、レーザービームＬＢ照射による熱が第１縦壁部１１に伝わるのが屈曲部１５により抑制される。従って、第１縦壁部１１の軟化が抑制され、アウタリインフォースメント１０とインナリインフォースメント２０とによる閉断面構造の外部荷重に対する強度を高めることができる。
Similarly to the first embodiment, in the fourth embodiment, the heat transmitted by the laser beam LB irradiation to the first vertical wall portion 11 is suppressed by the bending portion 15. Therefore, the softening of the first vertical wall portion 11 is suppressed, and the strength against the external load of the closed cross-sectional structure by the outer reinforcement 10 and the inner reinforcement 20 can be enhanced.
第４実施形態によれば、屈曲部１５がフランジ部１３の外側に存在しない。そのため、センタピラーを隣接する部材に接合する際、屈曲部１５が接合の邪魔にならないメリットがある。
According to the fourth embodiment, the bending portion 15 does not exist outside the flange portion 13. Therefore, when joining a center pillar to the adjacent member, there exists a merit that the bending part 15 does not become obstruction of joining.
＜第５実施形態＞
図７は、本発明の第５実施形態におけるセンタピラーの補強材の断面を示す。第５実施形態が第４実施形態（図６参照）と異なる点は、第４実施形態では、屈曲部１５がフランジ部１３の鋼材の一部を内側に屈曲して形成したのに対し、第５実施形態では、屈曲部１６がフランジ部１３の鋼材の一部を外側と内側の両方に屈曲して形成した点である。その他の構成は前述の実施形態と同一にすることができるため、再度の説明は省略する。 Fifth Embodiment
FIG. 7 shows a cross section of the reinforcing material of the center pillar in the fifth embodiment of the present invention. The fifth embodiment is different from the fourth embodiment (see FIG. 6) in that, in the fourth embodiment, the bendingportion 15 is formed by bending a portion of the steel material of the flange portion 13 inward. In 5 embodiment, it is a point which the bending part 16 bent and formed a part of steel materials of the flange part 13 both outside and inside. The other configurations can be the same as those of the above-described embodiment, and thus the description thereof will not be repeated.
図７は、本発明の第５実施形態におけるセンタピラーの補強材の断面を示す。第５実施形態が第４実施形態（図６参照）と異なる点は、第４実施形態では、屈曲部１５がフランジ部１３の鋼材の一部を内側に屈曲して形成したのに対し、第５実施形態では、屈曲部１６がフランジ部１３の鋼材の一部を外側と内側の両方に屈曲して形成した点である。その他の構成は前述の実施形態と同一にすることができるため、再度の説明は省略する。 Fifth Embodiment
FIG. 7 shows a cross section of the reinforcing material of the center pillar in the fifth embodiment of the present invention. The fifth embodiment is different from the fourth embodiment (see FIG. 6) in that, in the fourth embodiment, the bending
前後の各屈曲部１６は、各第１縦壁部１１の内側の延長線上に形成されている。そして、前側の屈曲部１６の前側に前側の第２縦壁部２１が設けられ、後側の屈曲部１６の後側に後側の第２縦壁部２１が設けられている。
Each of the front and rear bent portions 16 is formed on an inner extension of each first vertical wall portion 11. The front second vertical wall portion 21 is provided on the front side of the front bending portion 16 and the rear second vertical wall portion 21 is provided on the rear side of the rear bending portion 16.
第５実施形態も第１実施形態と同様、レーザービームＬＢ照射による熱が第１縦壁部１１に伝わるのが屈曲部１６により抑制される。第５実施形態では、屈曲部１６が外側と内側の両方に屈曲して形成され、フランジ部１３上の加熱領域から第１縦壁部１１までの伝熱経路がより長くされている。従って、第１縦壁部１１の軟化抑制効果が高められ、アウタリインフォースメント１０とインナリインフォースメント２０とによる閉断面構造の外部荷重に対する強度を更に高めることができる。
Similarly to the first embodiment, in the fifth embodiment, the heat transmitted by the laser beam LB to the first vertical wall portion 11 is suppressed by the bending portion 16. In the fifth embodiment, the bent portion 16 is formed to be bent to both the outer side and the inner side, and the heat transfer path from the heating region on the flange portion 13 to the first vertical wall portion 11 is made longer. Therefore, the effect of suppressing the softening of the first vertical wall portion 11 is enhanced, and the strength against external load of the closed cross-sectional structure by the outer reinforcement 10 and the inner reinforcement 20 can be further enhanced.
＜他の実施形態＞
他の実施形態として、車両ボデー構造部材は、センタピラーの補強構造のほか、フロントピラー、ルーフレール、サイドシル等の構造部材やそれらの補強材であってもよい。 Other Embodiments
As another embodiment, the vehicle body structural member may be a structural member such as a front pillar, a roof rail, a side sill, or a reinforcing member thereof in addition to the reinforcing structure of the center pillar.
他の実施形態として、車両ボデー構造部材は、センタピラーの補強構造のほか、フロントピラー、ルーフレール、サイドシル等の構造部材やそれらの補強材であってもよい。 Other Embodiments
As another embodiment, the vehicle body structural member may be a structural member such as a front pillar, a roof rail, a side sill, or a reinforcing member thereof in addition to the reinforcing structure of the center pillar.
以上、本発明を特定の実施形態を用いて説明したが、本発明はそれらの実施形態に限定されず、当業者は種々の変更、追加、削除を行うことが可能である。
Although the present invention has been described above using the specific embodiments, the present invention is not limited to these embodiments, and various modifications, additions, and deletions can be made by those skilled in the art.
Claims (5)
- 車両ボデー構造部材であって、
閉断面形成部位とその両端にフランジ部とを有する複数の鋼板部材を備え、これらの鋼板部材のフランジ部同士が面合わせにて溶接されて、閉断面形成部位で閉断面が形成されており、
前記複数の鋼板部材のうちの第一の鋼板部材がマルテンサイト組織を含んでおり、
前記第一の鋼板部材の前記フランジ部と閉断面形成部位との間の伝熱経路を長くする伝熱経路延長体を前記第一の鋼板部材のフランジ部の前記閉断面形成部位側に備える、車両ボデー構造部材。 A vehicle body structural member,
A plurality of steel plate members having a closed cross section forming portion and flange portions at both ends thereof are welded, and the flange portions of these steel plate members are welded face to face to form a closed cross section at the closed cross section forming portion,
The first steel plate member of the plurality of steel plate members includes a martensitic structure,
A heat transfer path extension for lengthening the heat transfer path between the flange portion of the first steel plate member and the closed cross section forming portion is provided on the closed cross section forming portion side of the flange portion of the first steel plate member. Vehicle body structural members. - 請求項１の車両ボデー構造部材であって、
前記伝熱経路延長体は前記フランジ部に形成された屈曲部である、車両ボデー構造部材。 The vehicle body structural member according to claim 1, wherein
The vehicle body structural member, wherein the heat transfer path extension is a bent portion formed in the flange portion. - 請求項２の車両ボデー構造部材であって、
前記各鋼板部材の前記閉断面形成部位は前記フランジ部に対して互いに遠ざかる方向に折り曲げられた縦壁部をそれぞれ備えており、
前記各縦壁部は折り曲げ部で互いに対向配置されているとともに、前記屈曲部は前記フランジ部の前記縦壁部側に形成されている、車両ボデー構造部材。 The vehicle body structural member according to claim 2, wherein
The closed cross section forming portions of the respective steel plate members each include a vertical wall portion bent in a direction away from each other with respect to the flange portion,
The vehicle body structural member, wherein the respective vertical wall portions are arranged to be opposed to each other in a bending portion, and the bending portion is formed on the side of the vertical wall portion of the flange portion. - 請求項２又は３の車両ボデー構造部材であって、
前記屈曲部は前記第一の鋼板部材以外の鋼板部材から離間する方向に突出している、車両ボデー構造部材。 The vehicle body structural member according to claim 2 or 3, wherein
The vehicle body structural member, wherein the bent portion protrudes in a direction away from the steel plate member other than the first steel plate member. - 請求項２～４のいずれかの車両ボデー構造部材であって、
前記第一の鋼板部材以外の各鋼板部材にも伝熱経路延長体としての屈曲部がそれぞれ設けられている車両ボデー構造部材。 The vehicle body structural member according to any one of claims 2 to 4, wherein
The vehicle body structural member in which each steel plate member other than the first steel plate member is provided with a bending portion as a heat transfer path extension.
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| JP2017-131179 | 2017-07-04 | ||
| JP2017131179A JP2019014305A (en) | 2017-07-04 | 2017-07-04 | Vehicle body structure |
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| JP2009266807A (en) * | 2008-03-31 | 2009-11-12 | Furukawa Electric Co Ltd:The | Method and device for welding flat cable and terminal |
| JP2015171731A (en) * | 2012-08-08 | 2015-10-01 | 新日鐵住金株式会社 | Method for welding overlapped part, method for manufacturing lap weld member, lap weld member, and component for automobile |
| WO2016017471A1 (en) * | 2014-08-01 | 2016-02-04 | 古河電気工業株式会社 | Planar heat pipe |
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| JP2019014305A (en) | 2019-01-31 |
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