JP3015894B2 - Impact beam for automobile door and method of manufacturing the same - Google Patents

Impact beam for automobile door and method of manufacturing the same

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Publication number
JP3015894B2
JP3015894B2 JP5201893A JP20189393A JP3015894B2 JP 3015894 B2 JP3015894 B2 JP 3015894B2 JP 5201893 A JP5201893 A JP 5201893A JP 20189393 A JP20189393 A JP 20189393A JP 3015894 B2 JP3015894 B2 JP 3015894B2
Authority
JP
Japan
Prior art keywords
bracket
impact beam
door
pipe
automobile door
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP5201893A
Other languages
Japanese (ja)
Other versions
JPH0732880A (en
Inventor
三郎 井上
正信 中村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP5201893A priority Critical patent/JP3015894B2/en
Publication of JPH0732880A publication Critical patent/JPH0732880A/en
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Publication of JP3015894B2 publication Critical patent/JP3015894B2/en
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Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】この発明は、自動車のドア内部に
装着され、側方衝突の際にドアの内方への破損を防止し
て乗員を保護するための自動車ドア用インパクトビ−
ム、及びその製造方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact door for an automobile door which is mounted inside a door of an automobile and protects an occupant by preventing damage to the inside of the door in a side collision.
And a method for manufacturing the same.

【0002】[0002]

【従来技術とその課題】近年、交通事故の多発傾向を背
景に、側方からの衝突等により自動車のドアが内方に変
形する事故に備えるための鋼製の補強材、即ち“自動車
ドア用インパクトビ−ム”が注目を集めている。
2. Description of the Related Art In recent years, against the background of the frequent occurrence of traffic accidents, a steel reinforcing material for an accident in which an automobile door is deformed inward due to a collision from the side, etc. The impact beam is drawing attention.

【0003】例えば実開昭52−112025号公報に
は上記自動車ドア用インパクトビ−ムの1例が示されて
いるが、これは、図11に示される如く、軽量で比較的大
きな衝撃エネルギ−を吸収することができるように形状
をパイプ状となしたビ−ム部1が主体となり、その両端
にブラケット2, 2が溶接接合されて構成されたものであ
る。そして、このインパクトビ−ムは自動車のドアの図
12に示す部位に装着されるが、装着に当っては図13で示
す如くドアの外板3と内板4との間の空所にブラケット
を介して溶接(スポット溶接)により固着される。
For example, Japanese Utility Model Laid-Open Publication No. Sho 52-112025 discloses an example of the impact beam for an automobile door, as shown in FIG. 11, which is lightweight and has a relatively large impact energy. The main body is a beam portion 1 having a pipe shape so as to be able to absorb the heat, and brackets 2 are welded to both ends thereof. And this impact beam is a diagram of a car door
At the time of mounting, it is fixed by welding (spot welding) via a bracket to a space between the outer plate 3 and the inner plate 4 of the door as shown in FIG.

【0004】しかしながら、上記図11からも分かるよう
に、上述のような自動車ドア用インパクトビ−ムは、製
作に際しブラケット2を溶接によりビ−ム部1に取付け
ねばならないため生産性が悪く、また溶接部の存在によ
る重量増加や材料特性の劣化も問題であった。
However, as can be seen from FIG. 11, the impact beam for an automobile door as described above has a low productivity because the bracket 2 has to be attached to the beam portion 1 by welding in manufacturing. There were also problems of weight increase and deterioration of material properties due to the presence of the weld.

【0005】一方、特開平4−238725号公報,特
開平4−238726号公報,特開平4−238727
号公報並びに特開平4−260815号公報を見ると、
帯鋼から細長いブランクを採取し、その長手方向両端部
をブラケット部としてほぼ平板状に残すと共にそれ以外
の中央部を管状にプレス加工した後、その管状部の継目
の一部を溶接接合して製造した自動車ドア用インパクト
ビ−ムが提案されている。
On the other hand, JP-A-4-238725, JP-A-4-238726, and JP-A-4-238727.
Japanese Patent Application Laid-Open No. 4-260815 and JP-A-4-260815,
After taking a long and thin blank from the steel strip, leaving both ends in the longitudinal direction as a bracket part in a substantially flat shape and pressing the other central part into a tube, a part of the joint of the tubular part is welded and joined. A manufactured impact beam for an automobile door has been proposed.

【0006】しかし、これらのインパクトビ−ムには次
の問題が指摘された。 a) インパクトビ−ム製造のために予め素材鋼板を所定
の寸法に切断した上でプレス加工と溶接を施す工程が必
要であり、生産性が悪い。 b) インパクトビ−ムを自動車用ドア内に溶接取付けす
るのが容易となるようにブラケット部の幅を大きくしよ
うとすると、素材鋼板から採取するブランクの形状を図
14で示したように変えねばならず、そのためブランク取
りの関係で材料歩留りが悪くなる。 c) 鋼板から作成した製品は肉厚が一定なので、更に軽
量化しようとすると全体を薄肉化した上で部分的に補強
材を取付ける必要があり、生産性はより悪くなる。 d) 管状に加工した鋼板の継目部を溶接するので、元々
有している材料の強度が溶接部において低下する。
However, the following problems were pointed out in these impact beams. a) In order to manufacture an impact beam, it is necessary to perform a process of cutting a material steel plate to a predetermined size in advance and then performing a press working and a welding, resulting in poor productivity. b) If the width of the bracket is to be increased so that the impact beam can be easily welded and installed in the car door, the shape of the blank sampled from the material steel plate is shown.
It has to be changed as shown at 14, which results in poor material yield due to blanking. c) Since the product made from steel plate has a constant thickness, it is necessary to reduce the overall thickness and to partially attach a reinforcing material in order to further reduce the weight, resulting in lower productivity. d) Since the seam of the steel plate processed into a tube is welded, the strength of the material originally possessed is reduced at the welded portion.

【0007】また、これらとは別に、管を素材とし、そ
の両端部の軸方向と周方向とに逆T字状の切欠きを設け
てからこれを展開してから、その展開部を偏平状にプレ
スして平板状のブラケットとした自動車ドア用インパク
トビ−ムも知られている(実開昭62−78519号公
報参照)。
Separately from these, a tube is made of a material, and an inverted T-shaped notch is provided at both ends in the axial direction and the circumferential direction. There is also known an impact beam for an automobile door which is pressed into a flat bracket (see Japanese Utility Model Application Laid-Open No. 62-78519).

【0008】この実開昭62−78519号に係るイン
パクトビ−ムは、素材管の端部を展開してブラケットと
しているので管状ビ−ム部に続いて素材管と一体の比較
的幅広ブラケットを有したものとなっており、そのため
自動車ドア内へ装着する際のスポット溶接領域を広く採
れることが特徴であるとされているが、それでもブラケ
ット幅の最大寸法は素材管の直径の約3倍(即ち素材管
の円周長)に止まるものでしかなく、スポット溶接作業
は自ずと制限されざるを得なかった。しかも、インパク
トビ−ムの全部位で肉厚は一定であり、ビ−ム部を管状
化した以外には軽量化に関する思想が見受けられないも
のであった。
In the impact beam according to Japanese Utility Model Application Laid-Open No. 62-78519, the end portion of the material pipe is developed as a bracket, so that a relatively wide bracket integrated with the material pipe is formed following the tubular beam part. It is said that it is characterized by a wide spot welding area when it is installed in an automobile door, but the maximum dimension of the bracket width is still about three times the diameter of the material pipe ( (I.e., the circumferential length of the material pipe), and the spot welding operation had to be naturally restricted. In addition, the thickness of the impact beam is constant at all portions of the impact beam, and no idea regarding weight reduction can be seen except for the tubular portion of the beam.

【0009】このようなことから、本発明が目的とした
のは、強度的に十分満足できることは勿論、軽量化が図
れる上にドアとの接合面積を広く取ることが可能で、し
かも材料歩留や生産性の点でも優れた自動車ドア用イン
パクトビ−ムを提供すると共に、その好適な製造手段を
確立することであった。
In view of the above, it is an object of the present invention to provide not only satisfactory strength, but also a reduction in weight and a large joint area with a door, and a material yield. Another object of the present invention is to provide an impact beam for an automobile door which is excellent also in terms of productivity and productivity, and to establish a suitable means for producing the same.

【0010】[0010]

【課題を解決するための手段】そこで、本発明者等は上
記目的を達成すべく鋭意研究を行ったところ、次のよう
な知見を得ることができた。 (a) 鋼管を自動車ドア用インパクトビ−ムの製造素材と
し、その端部にブラケット部を形成する際、一旦、管の
端部に口拡げ加工(管端の拡管)を施してやると拡管さ
れた管端部は直径が大きくなると同時に肉厚が薄くなる
ので、これを展開して偏平化した場合には、その偏平化
部の幅は素材管の円周長よりも大きくなって十分なスポ
ット溶接領域が確保される上、拡管された部位は薄肉と
なるのでその分だけ軽量化することも可能である。 (b) また、偏平化部を含む“拡管された部位”が薄肉化
していても、これを自動車ドア用インパクトビ−ムとし
た場合の“補強材としての性能”に格別な悪影響はな
い。 (c) 鋼管を素材とし、口拡げ加工と該部分の展開・偏平
化のみによって製品が得られるので生産性が良い上に材
料特性の劣化を招くこともなく、そして製造コストも非
常に低くて済む。
The inventors of the present invention have conducted intensive studies to achieve the above object, and have obtained the following findings. (a) A steel pipe is used as a material for manufacturing impact beams for automobile doors. When a bracket is formed at the end of the steel pipe, the pipe end is expanded once the pipe end is expanded (expansion of the pipe end). When the tube end is expanded and flattened, the width of the flattened portion becomes larger than the circumferential length of the material tube and sufficient In addition to securing a welding area, the expanded portion becomes thinner, so that the weight can be reduced accordingly. (b) Even if the "expanded portion" including the flattened portion is thinned, there is no particular adverse effect on the "performance as a reinforcing material" when this is used as an impact beam for an automobile door. (c) A steel pipe is used as a material, and a product can be obtained only by opening and flattening of the portion and opening and flattening of the portion. I'm done.

【0010】本発明は、上記知見事項等を基にした研究
によって完成されたものであり、「管状のビ−ム部の両
端に板状のブラケット部を有した鋼製の自動車ドア用イ
ンパクトビ−ムを、 図1に示すように、 前記ブラケット
部の少なくとも一方は接合されることなく管状ビ−ム部
から一体成形されて成り、 かつ該ブラケット部は幅が管
状ビ−ム部の円周長より大きく、 肉厚が管状ビ−ム部の
それよりも薄い寸法に形成した点」に大きな特徴を有
し、更には、「図2で示したように、 鋼管の少なくとも
一方の端部に口拡げ加工を施した後、その端部に軸方向
の切欠きを設け、 次いで切欠きを設けた管の端部を該切
欠き部より扇状に展開してから、 その展開部を押圧して
偏平化する工程によって、 性能の優れた自動車ドア用イ
ンパクトビ−ムを生産性良く製造し得るようにした点」
をも特徴とするものである。
The present invention has been completed by a study based on the above findings and the like, and is described as "a steel automobile impact door having a plate-shaped bracket at both ends of a tubular beam." As shown in FIG. 1, at least one of the bracket portions is integrally formed from a tubular beam portion without being joined, and the bracket portion has a width equal to the circumference of the tubular beam portion. It is characterized in that it is larger than the length and the wall thickness is formed to be smaller than that of the tubular beam part. ”Further, as shown in FIG. 2, at least one end of the steel pipe is After performing the mouth opening process, an axial notch is provided at the end, and then the end of the tube provided with the notch is developed in a fan shape from the notch, and then the developed portion is pressed. Flattening process for impact doors for car doors with excellent performance That was to be produced with good productivity. "
Is also characterized.

【0011】ここで、口拡げ加工してブラケット部を形
成する管端の部位を「鋼管の少なくとも一方の端部」と
したのは、鋼管の両端を本発明法に従って加工しブラケ
ット部を形成するのが最良ではあるものの、事情によっ
ては管端の一方のみに本発明法に従ったブラケット部形
成を行い、他端については別の手段(例えば別部材を溶
接接合する等の手段)でブラケット部を形成した場合に
も相応の効果を得ることができるからである。
Here, the term "at least one end of the steel pipe" is used as the end of the pipe at which the mouth is expanded to form the bracket part. Both ends of the steel pipe are processed according to the present invention to form the bracket part. Although it is best, depending on the circumstances, a bracket portion may be formed on only one of the tube ends according to the present invention, and the bracket portion may be formed on the other end by another means (for example, means such as welding another member). The reason is that a suitable effect can be obtained even when is formed.

【0012】以下、本発明に係る自動車ドア用インパク
トビ−ムを、その製造手順例に従ってより詳細に説明す
る。 [A] 素材鋼管の準備 鋼種を問わず、また強度を問わず種々の鋼管が自動車ド
ア用インパクトビ−ムを製造するための素材として使用
し得るが、適用鋼管の代表例を強度レベル別に示すと次
の通りである。
Hereinafter, the impact beam for an automobile door according to the present invention will be described in more detail in accordance with an example of its manufacturing procedure. [A] Preparation of material steel pipes Various steel pipes can be used as materials for manufacturing impact beams for automobile doors regardless of the steel type and strength. Is as follows.

【0013】〔引張強さが100kgf/mm2 以上のもの〕 a) 鋼管を高周波加熱又は炉加熱で焼入れし(焼入れ後
に焼鈍をする場合もある)、引張強さ100kgf/mm2
上を確保したもの。 b) 引張強さ100kgf/mm2 以上の高張力鋼帯を造管し
たもの。 〔引張強さが100kgf/mm2 未満のもの〕 a) 熱延鋼帯をそのまま造管したもの。 b) 熱延鋼帯を冷間圧延した後に造管したもの。 c) 継目無製管したもの。 d) 上記a),b)で造管したものを冷間抽伸又は冷間圧延
したもの。
[Tensile strength of 100 kgf / mm 2 or more] a) A steel pipe is quenched by high-frequency heating or furnace heating (annealing may be performed after quenching) to secure a tensile strength of 100 kgf / mm 2 or more. thing. b) A high-strength steel strip with a tensile strength of 100 kgf / mm 2 or more. Tensile what strength is less than 100 kgf / mm 2] a) that the hot rolled strip and was allowed to pipe formation. b) Hot rolled steel strip is cold rolled and then piped. c) Seamless pipes. d) The tube formed in a) and b) above is cold drawn or cold rolled.

【0014】[B] 口拡げ加工(管端拡管加工) 1) 前処理 素材鋼管の口拡げ加工する部分は、加工性を向上させる
ため前処理として焼鈍又は焼準熱処理を施した方が良
い。なお、鋼管を高周波加熱で焼入れして強度を高める
場合には、焼入れ前に焼鈍又は焼準を施しておき、口拡
げ加工部以外の部分のみを焼入れして口拡げ加工部の加
工性を確保することもできる。
[B] Mouth expansion (pipe end expansion) 1) Pretreatment The portion of the material steel pipe to be expanded is preferably subjected to annealing or normal heat treatment as a pretreatment in order to improve workability. If the steel pipe is to be quenched by high-frequency heating to increase its strength, annealing or normalizing is performed before quenching, and only the part other than the flared portion is quenched to secure the workability of the flared portion. You can also.

【0015】2) 口拡げ加工の手法 パンチを用いたプレス加工法を適用するのが一般的であ
るが、液圧バルジ加工法やゴムバルジ加工法等によって
も構わない。また、要求されるブラケット部の形状によ
り、テ−パ加工{図3の (a)あるいは(b) 等},段付加
工{図4},偏心口拡げ加工{図5}等が選ばれる。そ
して、口拡げ加工では、素材の強度や拡管量に応じて冷
間加工,温間加工あるいは熱間加工が選ばれる。
2) Method of Mouth Enlargement Process Generally, a press method using a punch is applied, but a hydraulic bulge method, a rubber bulge method, or the like may be used. Further, depending on the required shape of the bracket portion, taper processing (such as (a) or (b) in FIG. 3), step processing (FIG. 4), and eccentric opening expanding processing (FIG. 5) are selected. In the mouth expanding process, cold working, warm working or hot working is selected according to the strength of the material and the amount of expanded tube.

【0016】[C] 管端の展開・偏平化 1) 管端への切欠き敷設の方法 図6で示したように、管端拡管部に形成する切欠きは管
軸方向へ管軸と平行に(図6のイ)又はある程度の角度
を付けて(図6のロ)設けるが、その敷設の仕方として
はバイトや鋸等による切削切断法,バイトや鋸等での切
削によって切込み溝を入れた後にロ−ルを押し込む押し
込み切断法,レ−ザ−切断法,プラズマ切断法等が適用
できる。
[C] Expansion and flattening of the pipe end 1) Method of laying a notch in the pipe end As shown in FIG. 6, the notch formed in the pipe end expanded portion is parallel to the pipe axis in the pipe axis direction. (A in FIG. 6) or at a certain angle (b in FIG. 6). The laying method is as follows: a cutting method using a cutting tool or a saw, a cutting method using a cutting tool or a saw, and the like. After that, a roll cutting method in which a roll is pushed in, a laser cutting method, a plasma cutting method, or the like can be applied.

【0017】2) 展開の仕方 管端を切欠き部より扇状に展開する方法としては、切欠
きを敷設した後の管端から円錐コ−ン,先端付近に傾斜
部を有する平板(例えば将棋駒形状の板,舟形状の板,
これらの先鋭端をカットした形状の板)等を押し込んで
管端壁を周方向外側に展開させる方法が好ましい。な
お、図7で示すように、切欠き端には加工時に割れ等が
進展しないように丸み部(R部:キリ孔等)を設けるこ
とも推奨される。そして、展開後の管端はプレス加工で
偏平に仕上げてブラケット部とする。
2) Method of deployment As a method of expanding the pipe end in a fan shape from the notch, a flat plate having a conical cone from the pipe end after the notch is laid and an inclined portion near the tip (for example, shogi piece) Board, boat-shaped board,
A preferred method is to push in such a plate having a shape with a sharpened end cut out to expand the tube end wall outward in the circumferential direction. As shown in FIG. 7, it is also recommended to provide a rounded portion (R portion: drill hole or the like) at the notch end so that a crack or the like does not develop during processing. Then, the expanded pipe end is flattened by press working to form a bracket portion.

【0018】[D] ブラケット部の形状 管端に形成するブラケット部の形状については、切欠き
敷設時あるいは展開後に管端部を切断・プレス成形する
ことにより各種形状とすることができ、装着する自動車
ドア部の形状やドアへの装着の容易さ等を考慮して決定
すれば良い。なお、図8の (a), (b), (c)及び(d) はブ
ラケット部形状の代表例を示している。これらは基本的
なブラケット部の形状であるが、ドア部材との取り付け
に際し、取り合い等のために更なる成形を施して良いこ
とは言うまでもない。また、図9で示したように、ブラ
ケット部にビ−ド(補強リブ,突起等)付けを行って補
強(反り等の防止)を図るのも好ましい手段である。
[D] Shape of Bracket Portion Regarding the shape of the bracket portion formed at the pipe end, various shapes can be obtained by cutting and press-forming the pipe end at the time of laying the notch or after the development. What is necessary is just to determine in consideration of the shape of an automobile door part, the ease of mounting to a door, etc. 8A, 8B, 8C and 8D show typical examples of the shape of the bracket. Although these are the basic shapes of the bracket portion, it goes without saying that further mounting may be performed for attachment and the like when attaching to the door member. Further, as shown in FIG. 9, it is also preferable to provide beads (reinforcing ribs, protrusions, etc.) on the bracket portion for reinforcement (prevention of warpage, etc.).

【0019】以上のような手順を経て製造された自動車
ドア用インパクトビ−ムは、成形後の溶接部を有してお
らず、またブラケット部の幅は管状ビ−ム部の円周長
(素材管の円周長)よりも大きくなり、更にブラケット
部の肉厚は管状ビ−ム部のそれ(素材管の肉厚)よりも
薄くなっている。従って、このような本発明に係る自動
車ドア用インパクトビ−ムの主要な利点を挙げると次の
通りになる。
The impact beam for an automobile door manufactured through the above procedure does not have a welded portion after molding, and the width of the bracket portion is equal to the circumferential length of the tubular beam portion ( The thickness of the bracket portion is smaller than that of the tubular beam portion (the thickness of the material tube). Therefore, the main advantages of the impact beam for an automobile door according to the present invention are as follows.

【0020】ア) ブラケットと管状ビ−ムとを溶接接合
する必要がないので生産性が高い。イ ) ブラケット幅が素材管の外周長よりも大きいので、
ドアパネルとの接合面積を広く取ることができる。ウ ) ブラケット部の大幅化が薄肉化によって達成されて
いるので、製造に際して材料歩留が低下することがな
い。エ ) ブラケット部が薄肉化されているので軽量化が図れ
る。オ ) 管状ビ−ム部に成形後の溶接部位が無く、そのため
の強度低下がない。カ ) 素材として鋼管が使用されるので板素材からの成形
が不要であり、この点でも非常に高い生産性を確保でき
る。
A) The productivity is high because it is not necessary to weld the bracket and the tubular beam by welding. B) Since the bracket width is larger than the outer circumference of the material pipe,
The joint area with the door panel can be widened. C) Since the bracket portion is largely made thin by reducing the thickness, the material yield does not decrease during manufacturing. D) The weight of the bracket can be reduced because the thickness of the bracket is reduced. E) There is no welded part after forming in the tubular beam part, and there is no strength reduction. F) Since a steel pipe is used as a material, molding from a plate material is unnecessary, and in this respect, very high productivity can be secured.

【0021】続いて、本発明に係る自動車ドア用インパ
クトビ−ムの製造例を実施例により説明する。
Next, an example of manufacturing an impact beam for an automobile door according to the present invention will be described with reference to examples.

【実施例】まず、次に示す電縫鋼管を準備した。 〈化学組成〉 C:0.22%, Si:0.33%, Mn:1.18%, P:0.015
%,S:0.001%, B:0.0016%,Ti:0.012%, sol.
Al:0.037%,残部:Fe及び不可避不純物。 〈造管方法〉高周波電縫溶接。 〈焼準〉 焼準条件…900℃×5分保持。 焼準後特性…引張強さ:55kgf/mm2,降伏点:43kgf/mm2
伸び:30%。 〈サイズ〉外径31.8mm×厚さ2.1mm で、800mm 長に切断
したもの。
EXAMPLES First, the following ERW steel pipes were prepared. <Chemical composition> C: 0.22%, Si: 0.33%, Mn: 1.18%, P: 0.015
%, S: 0.001%, B: 0.0016%, Ti: 0.012%, sol.
Al: 0.037%, balance: Fe and inevitable impurities. <Piping method> High frequency electric resistance welding. <Normalization> Normalization conditions: Hold at 900 ° C for 5 minutes. Properties after normalization: tensile strength: 55 kgf / mm 2 , yield point: 43 kgf / mm 2 ,
Elongation: 30%. <Size> 31.8mm outside diameter x 2.1mm thickness, cut into 800mm length.

【0022】次に、前記電縫鋼管に対し、前処理として
両端部を除く中央部の部分焼入れを施した。なお、焼入
れ条件は次の通りであった。 焼入れ法:高周波誘導加熱で鋼管の中央部位を900℃
に加熱した後、水焼入れする。 焼入れ部:両管端部の 115mmを残した中央部位。
Next, the ERW steel pipe was partially quenched as a pretreatment at the center except for both ends. The quenching conditions were as follows. Quenching method: 900 ° C at the center of steel pipe by high frequency induction heating
And then water quenched. Quenching part: Central part leaving 115mm at both ends of the tube.

【0023】ここで、部分焼入れ後の鋼管の特性を調査
したが、その結果は下記の通りであった。 焼入れ部の引張強さ: 158kgf/mm2 , 焼入れ部の降伏点: 118kgf/mm2 , 焼入れ部の伸び:14%。
Here, the characteristics of the steel pipe after the partial quenching were investigated, and the results were as follows. Tensile strength of quenched part: 158 kgf / mm 2 , yield point of quenched part: 118 kgf / mm 2 , elongation of quenched part: 14%.

【0024】そして、上述のような前処理を施した鋼管
の両端部(各 115mm)にプレス加工により口拡げ加工を
施して管端の拡管を行った。なお、拡管率は1.40D(D
は管の外径)とした。
Then, both ends (each 115 mm) of the steel pipe which had been subjected to the pretreatment as described above were subjected to a mouth expanding process by press working to expand the pipe end. The expansion rate is 1.40D (D
Is the outer diameter of the tube).

【0025】次いで、拡管部を900℃で焼鈍した後、
管端から 115mmの位置に割れ進展防止用R部をドリルで
開孔し、丸鋸を使って管端からこの部位にまで管軸と平
行の切欠きを入れた。続いて、管端部から先端付近に傾
斜部を有する平板(将棋駒形状の板)を押し込んで管端
部を扇状に展開した後、プレスで押し潰して展開部の形
状を平らに整え、自動車ドア用インパクトビ−ムとし
た。
Next, after the expanded portion is annealed at 900 ° C.,
The R portion for preventing crack propagation was drilled at a position 115 mm from the pipe end with a drill, and a notch parallel to the pipe axis was made from the pipe end to this portion using a circular saw. Subsequently, a flat plate (a shogi piece-shaped plate) having an inclined portion from the pipe end to the vicinity of the tip is pushed in, and the pipe end is developed in a fan shape. Impact beam for doors.

【0026】このように形成された自動車ドア用インパ
クトビ−ムの寸法と形状は図10に示す通りであったが、
実用品として申し分の無い性能を示すことが確認され
た。
The size and shape of the impact beam for an automobile door thus formed were as shown in FIG.
It was confirmed that it exhibited excellent performance as a real product.

【0027】[0027]

【効果の総括】以上に示した如く、この発明によれば、
軽量でかつ強度的にも十分満足できる上、ドア内への装
着性,生産性,経済性等にも優れた自動車ドア用インパ
クトビ−ムを手軽に提供することが可能となるなど、産
業上極めて有用な効果がもたらされる。
[Summary of Effects] As described above, according to the present invention,
In addition to being lightweight and sufficiently satisfactory in strength, it is possible to easily provide impact doors for automobile doors that are excellent in ease of installation in a door, productivity, economy, etc. An extremely useful effect is provided.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明に係る自動車ドア用インパクトビ−ムの
1例に関する説明図である。
FIG. 1 is an explanatory diagram relating to an example of an impact beam for an automobile door according to the present invention.

【図2】本発明に係る自動車ドア用インパクトビ−ムの
製造工程例の説明図である。
FIG. 2 is an explanatory diagram of an example of a manufacturing process of an impact beam for an automobile door according to the present invention.

【図3】口拡げ加工のうちのテ−パ−加工に関する説明
図である。
FIG. 3 is an explanatory diagram relating to a taper process in the mouth expanding process.

【図4】口拡げ加工のうちの段付加工に関する説明図で
ある。
FIG. 4 is an explanatory diagram relating to stepping processing in the mouth expanding processing.

【図5】口拡げ加工のうちの偏心口拡げ加工に関する説
明図である。
FIG. 5 is an explanatory diagram relating to an eccentric mouth expanding process in the mouth expanding process.

【図6】切欠きの敷設形態に関する説明図である。FIG. 6 is an explanatory diagram relating to a notch laying mode.

【図7】割れの進展を防止するため切欠き端に設ける丸
み部(R部:キリ孔等)の説明図である。
FIG. 7 is an explanatory view of a rounded portion (R portion: drilled hole or the like) provided at a notch end to prevent crack propagation.

【図8】ブラケット部の形状例に関する説明図である。FIG. 8 is an explanatory diagram relating to a shape example of a bracket portion.

【図9】ブラケット部に設けるビ−ドの説明図である。FIG. 9 is an explanatory diagram of a bead provided on a bracket portion.

【図10】実施例で制作された自動車ドア用インパクト
ビ−ムの要部形状及び寸法に関する説明図である。
FIG. 10 is an explanatory diagram relating to the shape and dimensions of a main part of the impact beam for an automobile door manufactured in the example.

【図11】従来の自動車ドア用インパクトビ−ムに関す
る説明図である。
FIG. 11 is an explanatory view of a conventional impact beam for an automobile door.

【図12】インパクトビ−ムの自動車ドアへの装着位置
に関する説明図である。
FIG. 12 is an explanatory diagram relating to a mounting position of an impact beam to an automobile door.

【図13】自動車ドア内のインパクトビ−ム取付け状況
の説明図である。
FIG. 13 is an explanatory diagram of a state of mounting an impact beam in a vehicle door.

【図14】従来の自動車ドア用インパクトビ−ムを制作
する際の、素材板からのブランク取りに関する説明図で
ある。
FIG. 14 is an explanatory diagram relating to blank removal from a blank when producing a conventional impact beam for an automobile door.

【符号の説明】[Explanation of symbols]

1 ビ−ム部 2 ブラケット 3 ドア外板 4 ドア内板 DESCRIPTION OF SYMBOLS 1 Beam part 2 Bracket 3 Door outer plate 4 Door inner plate

フロントページの続き (56)参考文献 実開 昭62−78519(JP,U) (58)調査した分野(Int.Cl.7,DB名) B60J 5/00 B21D 53/86 B23P 13/00 Continuation of the front page (56) References Japanese Utility Model Sho 62-78519 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) B60J 5/00 B21D 53/86 B23P 13/00

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 管状のビ−ム部の両端に板状のブラケッ
ト部を有した鋼製の自動車ドア用インパクトビ−ムであ
って、前記ブラケット部の少なくとも一方は接合される
ことなく管状ビ−ム部から一体成形されて成り、かつ該
ブラケット部は幅が管状ビ−ム部の円周長より大きく、
肉厚が管状ビ−ム部のそれよりも薄い寸法に形成されて
いることを特徴とする、自動車ドア用インパクトビ−
ム。
An impact beam for a vehicle door made of steel having a plate-shaped bracket at both ends of a tubular beam, wherein at least one of the brackets is not joined. The bracket portion is formed integrally, and the bracket portion has a width greater than the circumference of the tubular beam portion;
An impact door for an automobile door, wherein a thickness of the impact beam is formed to be smaller than that of the tubular beam portion.
M
【請求項2】 鋼管の少なくとも一方の端部に口拡げ加
工を施した後、その端部に軸方向の切欠きを設け、次い
で切欠きを設けた管の端部を該切欠き部より扇状に展開
してから、その展開部を押圧して偏平化することを特徴
とする、自動車ドア用インパクトビ−ムの製造方法。
2. A steel pipe having at least one end formed with a flared opening is provided with an axial notch at the end thereof, and then the end of the notched pipe is formed into a fan shape from the notch. And then flattening the expanded portion by pressing the expanded portion.
JP5201893A 1993-07-22 1993-07-22 Impact beam for automobile door and method of manufacturing the same Expired - Fee Related JP3015894B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5201893A JP3015894B2 (en) 1993-07-22 1993-07-22 Impact beam for automobile door and method of manufacturing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5201893A JP3015894B2 (en) 1993-07-22 1993-07-22 Impact beam for automobile door and method of manufacturing the same

Publications (2)

Publication Number Publication Date
JPH0732880A JPH0732880A (en) 1995-02-03
JP3015894B2 true JP3015894B2 (en) 2000-03-06

Family

ID=16448578

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5201893A Expired - Fee Related JP3015894B2 (en) 1993-07-22 1993-07-22 Impact beam for automobile door and method of manufacturing the same

Country Status (1)

Country Link
JP (1) JP3015894B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180096499A (en) * 2017-02-20 2018-08-29 한온시스템 주식회사 Heat exchanger

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002205135A (en) * 2001-01-09 2002-07-23 Daikure Co Ltd Fin material for serrated fin tube, and manufacturing method thereof
WO2007089057A1 (en) * 2006-02-02 2007-08-09 Dongwon Metal Ind. Co., Ltd. Automobile impact beam with integrated brackets and the manufacturing method thereof
JP2016084830A (en) * 2014-10-23 2016-05-19 積水化学工業株式会社 Pipe passage forming method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6278519U (en) * 1985-11-06 1987-05-20

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180096499A (en) * 2017-02-20 2018-08-29 한온시스템 주식회사 Heat exchanger
KR102038550B1 (en) * 2017-02-20 2019-10-31 한온시스템 주식회사 Heat exchanger
US10801780B2 (en) 2017-02-20 2020-10-13 Hanon Systems CAB/MAAR concept improvement

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