JP3751216B2 - Hollow profile for friction stir welding - Google Patents

Hollow profile for friction stir welding Download PDF

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JP3751216B2
JP3751216B2 JP2001117051A JP2001117051A JP3751216B2 JP 3751216 B2 JP3751216 B2 JP 3751216B2 JP 2001117051 A JP2001117051 A JP 2001117051A JP 2001117051 A JP2001117051 A JP 2001117051A JP 3751216 B2 JP3751216 B2 JP 3751216B2
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hollow shape
friction stir
stir welding
face plates
shape member
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JP2002316274A (en
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昌邦 江角
一成 福寄
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Hitachi Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Description

【０００１】
【発明の属する技術分野】
本発明は摩擦攪拌接合に用いる中空形材に関する。
【０００２】
【従来の技術】
摩擦攪拌接合方法は、接合部に挿入した丸棒（回転工具という）を回転させながら接合線に沿って移動させ、接合部を発熱、軟化させて塑性流動させ、固相接合する方法である。回転工具は大径部と小径部からなる。小径部を接合すべき部材に挿入し、大径部の端面を前記部材に接触させている。小径部にはねじを設けている。
【０００３】
接合すべき２つの部材の回転工具の挿入側に凸部を設け、この凸部の金属を原資として２つの部材の間の隙間を埋めるようにしている。回転工具の大径部は凸部内に入れている。
回転工具を接合部の金属に挿入しなければならないので、接合部には大きな力がかかる。このため、中空形材を接合する際には、中空形材の２つの面板を接続する接続板の部分を他方の中空形材との摩擦攪拌接合位置としている。これは前記接続板で前記力を支え、中空形材の変形を防止しながら摩擦攪拌接合するものである。
【０００４】
これらは特開平９−３０９１６４号公報（ＥＰ０７９７０４３Ａ２）、特開平１１−９０６５５号公報（ＵＳＰ６０５０４７４）に示されている。
【０００５】
【発明が解決しようとする課題】
２つの板の突き合わせ部を溶接（または摩擦攪拌接合）すると、溶接熱によって変形する。その変形の１つとして板の厚さ方向に板が変形する。このため、溶接部の一方の板と他方の板との間に段差が生じ、平面度が悪くなりやすい。このため、中空形材においては、溶接部の近傍には並列な２つの面板を接続する板を設け、面板が厚さ方向に変形するのを防止する。この接続板は中空形材のそれぞれの溶接部の近傍に設けている。この接続板は面板に直交している。
【０００６】
摩擦攪拌接合はアーク溶接に比べて接合温度は低いので、変形は少ないが、それなりの変形が考えられる。このため、前記特開平９−３０９１６４号公報（ＥＰ０７９７０４３Ａ２）、特開平１１−９０６５５号公報（ＵＳＰ６０５０４７４）でも前記接合板を設けている。前記特開平１１−９０６５５号公報（ＵＳＰ６０５０４７４）ではそれぞれの中空形材の端部に前記接続板を設けている。このため、強度を無視して議論すれば、接続板によって質量が増大する。
【０００７】
なお、前記特開平９−３０９１６４号公報（ＥＰ０７９７０４３Ａ２）では摩擦攪拌接合する一対の中空形材の一方のみに接続板を設けている。
本発明の目的は、軽量で良好な接合ができる摩擦攪拌接合用中空形材を提供することにある。
【０００８】
【課題を解決するための手段】
上記目的のため、本発明の中空形材は、２つの面板と、前記２つの面板を接続する接続板とからなる摩擦攪拌接合用中空形材において、前記２つの面板は中空形材の幅方向端部が突合せ部となっており、前記接続板は、前記２つの面板を接続するものであって、少なくとも一端は前記面版の突合せ部を除いた位置に接続した第１の接続板と、前記２つの面板の突合せ部同士を接続するものであって、前記面板に実質的に直交した第２の接続板と、からなり、前記第２の接続板と前記２つの面板の突合せ部との接続部には、中空形材の幅方向の外方および厚さ方向の外方に向けて開口した凹部が形成されており、前記２つの面板のうちの一方の面板の突合せ部と前記第２の接続板との接続部に形成された前記凹部には、溝または凸部が形成されており、前記溝は、中空形材の幅方向の端部側に向けて開口しており、前記凸部は、中空形材の幅方向の端部側に向けて突出している構成を具備する。
【００１０】
【発明の実施の形態】
本発明の一実施例を図１から図３によって説明する。鉄道車両の車体５００は、側面を構成する側構体５０１、屋根を構成する屋根構体５０２、床を構成する台枠５０３、長手方向の端部を構成する妻構体５０４からなる。側構体５０１、屋根構体５０２、台枠５０３は、それぞれ複数の押し出し形材１０、２０を接合して構成している。押し出し形材１０、２０の長手方向（押し出し方向）を車体５００の長手方向に向け、車体５００の周方向に多数並べている。押し出し形材１０、２０はアルミニウム合金製の中空形材である。
【００１１】
側構体５０１を構成する中空形材１０と２０との接合部について説明する。他の箇所の中空形材の接合部も同様にできる。
中空形材１０（２０）は、実質的に平行な２枚の面板１１（２１）、１２（２２）と、この２枚の面板を接続する複数の接続板１３（２３）、１４と、からなる。接続板１３（２３）は面板１１（２１）、１２（２２）に対して傾斜している。つまり、面板１１（２１）、１２（２２）、接続板１３（２３）によってトラスを構成している。中空形材１０、２０の使用個所によっては、一方の面板１１、２１は他方の面板１２、２２に対して傾斜したり、円弧状になったり、全体が円弧状になっている。
【００１２】
中空形材１０の幅方向の端部の接続板１４は面板１１、１２に対して実質的に直交している。中空形材２０の端部には面板２１、２２に対して直交する接続板はない。接続板１４と面板１１、１２とのそれぞれの接続部には中空形材２０の面板２１、２２の端部が重なる凹部がある。前記それぞれの接続部には面板２１、２２を支える突出片１５がある。突出片１５は接続板１４から中空形材１０の幅方向の端部側に突出している。前記凹部は面板１１（１２）、接続板１４、突出片１５から構成される。凹部は中空形材１０の幅方向の外方および厚さ方向の外方に向けて開口している。凹部に面板２１、２２を重ねたとき、面板２１、２２の端面と面板１１、１２の端面とが突き合わせられる。
【００１３】
面板１１、１２（２１、２２）の端部には中空形材１０、２０の厚さ方向の外側に突出する凸部１７（２７）がそれぞれある。面板１１、１２（２１、２２）の端面および凸部１７（２７）の端面は中空形材１０（２０）の厚さ方向に沿っている。面板１１、１２および凸部１７の端面（中空形材１０の幅方向の端部）は接続板１４の板厚の中心Ｃの延長線上にある。面板２１、２２および凸部２７の端面（中空形材２０の幅方向の端部）は接続板１４の板厚の中心Ｃの延長線上にある。
【００１４】
中空形材１０と中空形材２０とを組み合わせたとき、接続板１４の板厚の中心Ｃの延長線上に、面板１１、１２、２１、２２および凸部１７、１７、２７，２７の端面がある。この組み合わせによって、中空形材１０の面板１１（１２）および凸部１７（１７）の端面と中空形材２０の面板２１（２２）および凸部２７（２７）の端面とが突き合わせられる。このとき、突き合わせ部の隙間はできるだけ小さくなるように各部を設けている。すなわち、面板２１、２２の間隔、凹部の間隔を定めている。
【００１５】
中空形材１０、２０を突き合わせた時、面板１１、１２の外面と面板２１、２２の外面とは実質的に同一面にあり、凸部１７、２７の突出代は同一である。２つの凸部１７、２７の幅は同一である。２つの凸部１７、２７を合わせた幅は回転工具５０の大径部５１の径よりも大きい。凸部１７、２７の金属は、突き合わせた部分の隙間を埋める金属の原資となる。
【００１６】
中空形材１０の突き合わせ部の端面（中空形材１０の厚さ方向に沿った凹部の面（面板１１、１２に実質的に直交する面、中心Ｃに沿った面。））には中空形材１０の長手方向に沿って溝１８、１８がある。中空形材２０の突き合わせ部の端面（面板２１、２２に実質的に直交する面、中心Ｃに沿った面。）には中空形材２０の長手方向に沿って凸部２８、２８がある。凸部２８は溝１８に入る。
【００１７】
凸部２８を溝１８に挿入しやすくするため、溝１８および凸部２８を台形状にしている。凸部２８の幅は先端側が基部よりも小さい。溝１８の幅は底部が開口部側よりも小さい。溝１８、凸部２８のそれぞれの角部は円弧状にしている。両者を組み合わせたとき、両者の間の隙間は小さくなるように、凸部２８、溝１８の大きさを定めている。特に、中空形材１０、２０の厚さ方向における溝１８と凸部２８との間の隙間は小さくしている。または、中空形材１０、２０の厚さ方向において、溝１８と凸部２８とは接触していることが望ましい。
【００１８】
中空形材１０（２０）の厚さ方向における溝１８（凸部２８）の位置は面板１１、１２（２１、２２）と凸部１７、１７（２７、２７）とを合わせた厚さの範囲内にあればよい。
【００１９】
面板１１、１２、２１、２２の突き合わせ部の板厚は他の部分の厚さよりも厚くしている。中空形材の厚さ方向の外面側は実質的に平らにしなければならないので、面板の内面側に向けて突出させて、厚くしている。この厚さは突き合わせ部から遠ざかるにしたがって徐々に薄くしている。凹部の底面は面板１１、１２、２１、２２の外面に実質的に平行である。
【００２０】
接合に当たって、２つの中空形材１０、２０を図１のように嵌め合わせる。凸部２８、２８が溝１８、１８に入る。溝１８は中空形材の幅方向の端部側に向けて開口し、凸部は中空形材の幅方向の端部側に向けて突出しているので、嵌め合わせは容易にできる。
嵌め合わせたら、中空形材１０、２０を架台１００に固定する。１０１は下面の凸部１７、２７が入る溝である。固定後、突き合わせ部の上面側を間欠的に仮止め溶接する。
【００２１】
回転工具５０は大径部５１の先端に小径部５２を設けている。小径部５２にはねじを設けている。接合に際しては、突き合わせ部に回転工具５０を挿入する。回転工具５０の軸心は接続板１４の板厚の中心Ｃの延長線上に位置させる。大径部５１の下端は面板１１、２１（１２、２２）の外面の延長線と凸部１７、２７（１７、２７）の頂面との間に位置させる。小径部５２は面板１１（１２）と面板２１（２２）との突き合わせ部に挿入する。小径部５２の下端は突出片１５の上面（凹部の底面）よりも若干挿入している。少なくとも突出片１５まで塑性流動するように、小径部５２を挿入する。
【００２２】
回転工具５０の軸心を接続板１４の板厚の中心Ｃの延長線上に位置させたとき、溝１８は小径部５２の径の範囲内に位置する。凸部２８は小径部５２の径の範囲内に位置する。この状態で、回転工具５０を回転させながら、突き合わせ部の接合線に沿って移動させる。
【００２３】
一方の面側の摩擦攪拌接合が終了したら、中空形材１０、２０を上下に反転させ、同様に摩擦攪拌接合を行う。
【００２４】
次に、車体５００の外面側に位置する凸部１７、２７を切削して、接合部の外面を面板１１、２１（１２,２２）の外面と同一面にする。
これによれば、摩擦攪拌接合による摩擦熱によって面板２１（２２）が変形しようとしても、凸部２８と溝１８とが嵌め合わせられているので、面板２１（２２）の上下方向の移動を防止または抑制する。このため、面板１１（１２）と面板２１（２２）との間に段差の少ない接合ができる。
【００２５】
このため、摩擦攪拌接合後、前記段差を少なくする切削作業を少なくできる。このため、安価にできるものである。また、中空形材２０の端部において面板２１、２２に直交する接続板を予め除くことができる。このため、中空形材２０を安価で、軽量にできるものである。
【００２６】
回転工具５０の軸心を接続板１４の板厚の中心Ｃの延長線上に位置させたとき、溝１８は小径部５２の径の範囲内に位置する。凸部２８は小径部５２の径の範囲内に位置する。このため、溝１８と凸部２８との間に隙間があっても、隙間は埋められ、接合される。溝１８および凸部２８が小径部５２の径の範囲内に位置しなくても、小径部５２によって、溝１８および凸部２８が塑性流動するように、溝１８および凸部２８の位置および大きさを定める。
【００２７】
回転工具５０は接続板１４の板厚の延長線上に位置するので、摩擦接合の際の荷重は接続板１４で支えられ、接合部が変形することが少ない。接続板１４はこの荷重を支える剛性を有する。接続板１４の板厚の中心Ｃの延長線上に回転工具５０の軸心が位置するのがよい。
【００２８】
面板１１、２１、１２、２２（凸部１７、２７の部分を除く）の外面の延長線よりも外面側の凸部１７、２７の部分（凸部１７、２７の突出代の部分）に、溝１８および凸部２８の一部を設置しているので、所要の大きさの溝１８および凸部２８を容易に設けることができるものである。
接続板１４の板厚の中心Ｃの延長線上に、回転工具５０の軸心、凸部１７、２７の端部が実質的に位置しているのが望ましい。
【００２９】
上記実施例では中空形材１０の凹部に溝１８を設け、中空形材２０に凸部２８を設けているが、中空形材１０の凹部に凸部を設け、中空形材２０の面板２１、２２の端部に溝を設けることができる。しかし、前者の方が、押し出し形材を製作する際に正確にできると考えられる。
【００３０】
また、一方の面板１１側（一方の凹部側）に溝を設け、他方の面板１２側（他方の凹部側）に凸部を設け、一方の面板２１に凸部を設け、他方の面板２２に溝を設けることができる。
【００３１】
図４、図５の実施例を説明する。接続板１４の板厚の中心Ｃの延長線上に、溝１８の深さの中心が位置する。このため、面板１１、１２および凸部１７の突き合わせ部の端面は接続板１４の板厚の中心Ｃよりも中空形材１０の端部側に突出している。中空形材２０の突き合わせ部はこれに対応して設けている。すなわち、面板２１、２２および凸部２７の突き合わせ部の端面（凸部２８を除く。）は接続板１４の板厚の中心Ｃの延長線上よりも中空形材１０の幅方向の他端側に突出している。このため、凸部１７の幅が凸部２７の幅よりも大きい。
【００３２】
回転工具５０の軸心を接続板１４の板厚の中心Ｃの延長線上に位置させて摩擦攪拌接合を行う。摩擦攪拌接合に当たって、凸部１７、２７の突き合わせ部の位置を求め、その位置から中空形材１０側に所定量偏寄させた位置を回転工具５０の位置とする。
これによれば、溝１８および凸部２８に対する回転工具５０（小径部５２）の軸心の位置ずれの許容量を大きくできるものである。
接続板１４の板厚の中心Ｃの延長線上に、回転工具５０の軸心、溝１８の深さの中心が実質的に位置しているのが望ましい。
【００３３】
上記各実施例では、摩擦攪拌接合時の荷重を支持するために、接続板１４を設けている。しかし、面板１１、１２、２１、２２、および接続板１３、２３からなる空間に支持部材を配置して、前記荷重を支持するようにすれば、接続板１４を除くことができる。中空形材１０、２０の幅方向の端部の位置（溝１８、凸部２８の位置、すなわち突き合わせ部の位置）は実質的に同一位置にある。支持部材は例えば下方の面板１２、２２に載る。
【００３４】
本発明の技術的範囲は、特許請求の範囲の各請求項に記載の文言あるいは課題を解決するための手段の項に記載の文言に限定されず、当業者がそれから容易に置き換えられる範囲にも及ぶものである。
【００３５】
【発明の効果】
本発明のよれば、軽量で良好な摩擦攪拌接合ができるものである。
【図面の簡単な説明】
【図１】本発明の一実施例の中空形材の接合部の縦断面図。
【図２】図１の中空形材の接合部の全体の縦断面図。
【図３】鉄道車両の車体の斜視図。
【図４】本発明の他の実施例の中空形材１０の接合部の縦断面図。
【図５】図４の接合部に用いる中空形材２０の接合部の縦断面図。
【符号の説明】
１０、２０：中空形材、１１、１２、２１、２２：面板、１５：突出片、１７、２７：凸部、１８：溝、２８：凸部、５０：回転工具、５１：大径部、５２：小径部。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hollow material used for friction stir welding.
[0002]
[Prior art]
The friction stir welding method is a method in which a round bar (referred to as a rotary tool) inserted into a joint is moved along a joining line while rotating, and the joint is heated and softened to be plastically flowed for solid phase joining. A rotary tool consists of a large diameter part and a small diameter part. The small diameter portion is inserted into the member to be joined, and the end surface of the large diameter portion is brought into contact with the member. A screw is provided in the small diameter portion.
[0003]
A convex part is provided on the insertion side of the rotary tool of the two members to be joined, and the gap between the two members is filled using the metal of the convex part as a source. The large-diameter portion of the rotary tool is placed in the convex portion.
Since the rotary tool must be inserted into the metal at the joint, a large force is applied to the joint. For this reason, when joining a hollow shape member, the part of the connection plate which connects two face plates of a hollow shape member is made into the friction stir welding position with the other hollow shape member. This supports the force by the connecting plate and performs friction stir welding while preventing deformation of the hollow shape member.
[0004]
These are disclosed in JP-A-9-309164 (EP0797043A2) and JP-A-11-90655 (USP6050474).
[0005]
[Problems to be solved by the invention]
When the butted portions of the two plates are welded (or friction stir welding), they are deformed by welding heat. As one of the deformations, the plate is deformed in the thickness direction of the plate. For this reason, a level | step difference arises between one board and the other board of a welding part, and flatness tends to worsen. For this reason, in the hollow shape member, a plate connecting two parallel face plates is provided in the vicinity of the welded portion to prevent the face plate from being deformed in the thickness direction. This connection plate is provided in the vicinity of each welded portion of the hollow shape member. This connecting plate is orthogonal to the face plate.
[0006]
Friction stir welding has a lower joining temperature than arc welding, so there is little deformation, but some deformation can be considered. For this reason, the joining plate is also provided in Japanese Patent Laid-Open No. 9-309164 (EP0797043A2) and Japanese Patent Laid-Open No. 11-90655 (USP 6050474). In JP-A-11-90655 (USP 6050474), the connection plate is provided at the end of each hollow shape member. For this reason, if the strength is neglected, the mass is increased by the connection plate.
[0007]
In JP-A-9-309164 (EP0797043A2), a connection plate is provided only on one of a pair of hollow members to be friction stir welded.
An object of the present invention is to provide a hollow member for friction stir welding that is lightweight and can be satisfactorily bonded.
[0008]
[Means for Solving the Problems]
Me other above object, the hollow shape member of the present invention includes two face plates, the two in the hollow shape member for friction stir welding comprising a connection plate for connecting the face plates, said two face plates the width of the hollow profile A direction end portion is a butting portion, and the connecting plate connects the two face plates, and at least one end is connected to a position excluding the butting portion of the face plate and a first connecting plate And connecting the butted portions of the two face plates, and comprising a second connecting plate substantially orthogonal to the face plate, the second connecting plate and the butted portions of the two face plates, The connecting portion is formed with a recess that opens outward in the width direction and in the thickness direction of the hollow shape member, and the butted portion of one of the two face plates and the first face plate A groove or a convex portion is formed in the concave portion formed in the connecting portion with the two connecting plates. Cage, wherein the groove is open toward the end portion side in the width direction of the hollow shape member, said convex portion comprises a structure protruding toward the end portion side in the width direction of the hollow profile.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. A railcar body 500 includes a side structure 501 that constitutes a side surface, a roof structure 502 that constitutes a roof, a frame 503 that constitutes a floor, and a wife structure 504 that constitutes an end portion in the longitudinal direction. The side structure 501, the roof structure 502, the underframe 50 3 constitute respectively by joining plural extruded frame members 10, 20. A number of the extruded shape members 10 and 20 are arranged in the circumferential direction of the vehicle body 500 with the longitudinal direction (extrusion direction) of the extruded shape members 10 and 20 directed in the longitudinal direction of the vehicle body 500. The extruded shape members 10 and 20 are hollow shapes made of an aluminum alloy.
[0011]
A joint portion between the hollow members 10 and 20 constituting the side structure 501 will be described. The joint part of the hollow shape material of another location can be made similarly.
The hollow shape member 10 (20) includes two substantially parallel face plates 11 (21) and 12 (22), and a plurality of connection plates 13 (23) and 14 that connect the two face plates. Become. The connection plate 13 (23) is inclined with respect to the face plates 11 (21) and 12 (22). That is, the truss is constituted by the face plates 11 (21) and 12 (22) and the connection plate 13 (23). Depending on where the hollow members 10 and 20 are used, one of the face plates 11 and 21 is inclined with respect to the other face plates 12 and 22, is arcuate, or is entirely arcuate.
[0012]
The connection plate 14 at the end in the width direction of the hollow shape member 10 is substantially orthogonal to the face plates 11 and 12. There is no connection plate orthogonal to the face plates 21 and 22 at the end of the hollow shape member 20. Each connection portion between the connection plate 14 and the face plates 11 and 12 has a recess where the end portions of the face plates 21 and 22 of the hollow shape member 20 overlap. Each connecting portion has a protruding piece 15 that supports the face plates 21 and 22. The protruding piece 15 protrudes from the connecting plate 14 toward the end of the hollow shape member 10 in the width direction. The concave portion includes a face plate 11 (12), a connection plate 14, and a protruding piece 15. The concave portion is opened toward the outer side in the width direction and the outer side in the thickness direction of the hollow shape member 10. When the face plates 21 and 22 are stacked on the recess, the end faces of the face plates 21 and 22 and the end faces of the face plates 11 and 12 are abutted.
[0013]
The end portions of the face plates 11 and 12 (21 and 22) have convex portions 17 (27) protruding outward in the thickness direction of the hollow members 10 and 20, respectively. The end faces of the face plates 11, 12 (21, 22) and the end faces of the convex portions 17 (27) are along the thickness direction of the hollow profile 10 (20). The end surfaces of the face plates 11 and 12 and the convex portion 17 (end portions in the width direction of the hollow shape member 10) are on an extension line of the center C of the plate thickness of the connection plate 14. The end surfaces of the face plates 21 and 22 and the convex portion 27 (end portions in the width direction of the hollow shape member 20) are on an extension line of the center C of the thickness of the connection plate 14.
[0014]
When the hollow shape member 10 and the hollow shape member 20 are combined, the end faces of the face plates 11, 12, 21, 22 and the convex portions 17, 17, 27, 27 are on the extension line of the center C of the thickness of the connection plate 14. is there. By this combination, the end surface of the face plate 11 (12) and the convex portion 17 (17) of the hollow shape member 10 and the end surface of the face plate 21 (22) and the convex portion 27 (27) of the hollow shape member 20 are abutted. At this time, each portion is provided so that the gap between the butted portions is as small as possible. That is, the space | interval of the face plates 21 and 22 and the space | interval of a recessed part are defined.
[0015]
When the hollow shape members 10 and 20 are brought into contact with each other, the outer surfaces of the face plates 11 and 12 and the outer surfaces of the face plates 21 and 22 are substantially in the same plane, and the protrusions of the convex portions 17 and 27 are the same. The widths of the two convex portions 17 and 27 are the same. The combined width of the two convex portions 17 and 27 is larger than the diameter of the large-diameter portion 51 of the rotary tool 50. The metal of the convex parts 17 and 27 becomes a metal resource that fills the gap between the butted parts.
[0016]
The end face of the butted portion of the hollow shape member 10 (the surface of the recess along the thickness direction of the hollow shape member 10 (the surface substantially perpendicular to the face plates 11 and 12, the surface along the center C)) is hollow. There are grooves 18, 18 along the longitudinal direction of the material 10. The end surfaces of the butted portion of the hollow shape member 20 (surfaces substantially perpendicular to the face plates 21 and 22, surfaces along the center C) have convex portions 28 and 28 along the longitudinal direction of the hollow shape member 20. The convex portion 28 enters the groove 18.
[0017]
In order to facilitate the insertion of the convex portion 28 into the groove 18, the groove 18 and the convex portion 28 are trapezoidal. The width of the convex portion 28 is smaller at the tip side than at the base portion. The width of the groove 18 is smaller at the bottom than at the opening side. The corners of the groove 18 and the convex portion 28 are arcuate. The size of the convex portion 28 and the groove 18 is determined so that the gap between the two becomes small when both are combined. In particular, the gap between the groove 18 and the convex portion 28 in the thickness direction of the hollow shape members 10 and 20 is made small. Alternatively, it is desirable that the groove 18 and the convex portion 28 are in contact with each other in the thickness direction of the hollow shape members 10 and 20.
[0018]
The position of the groove 18 (convex portion 28) in the thickness direction of the hollow shape member 10 (20) is a range of thickness in which the face plates 11, 12 (21, 22) and the convex portions 17, 17 (27, 27) are combined. It only has to be inside.
[0019]
The thickness of the butted portion of the face plates 11, 12, 21, and 22 is thicker than the thickness of the other portions. Since the outer surface side in the thickness direction of the hollow shape member has to be substantially flat, it is made thicker by projecting toward the inner surface side of the face plate. This thickness is gradually reduced as the distance from the abutting portion increases. The bottom surface of the recess is substantially parallel to the outer surface of the face plates 11, 12, 21, 22.
[0020]
In joining, the two hollow members 10, 20 are fitted together as shown in FIG. The convex portions 28, 28 enter the grooves 18, 18. Since the groove 18 opens toward the end in the width direction of the hollow shape and the convex portion protrudes toward the end in the width direction of the hollow shape, the fitting can be easily performed.
After the fitting, the hollow shape members 10 and 20 are fixed to the gantry 100. Reference numeral 101 denotes a groove into which the convex portions 17 and 27 on the lower surface enter. After fixing, the upper surface side of the butted portion is intermittently temporarily welded.
[0021]
The rotary tool 50 is provided with a small diameter portion 52 at the tip of the large diameter portion 51. The small diameter portion 52 is provided with a screw. At the time of joining, the rotary tool 50 is inserted into the abutting portion. The axis of the rotary tool 50 is positioned on an extension line of the center C of the thickness of the connection plate 14. The lower end of the large diameter part 51 is located between the extended line of the outer surface of the face plates 11, 21 (12, 22) and the top face of the convex parts 17, 27 (17, 27). The small diameter portion 52 is inserted into the abutting portion between the face plate 11 (12) and the face plate 21 (22). The lower end of the small diameter portion 52 is inserted slightly from the upper surface (the bottom surface of the recess) of the protruding piece 15. The small diameter portion 52 is inserted so as to plastically flow at least to the protruding piece 15.
[0022]
When the axis of the rotary tool 50 is positioned on the extension line of the center C of the thickness of the connection plate 14, the groove 18 is positioned within the diameter range of the small diameter portion 52. The convex portion 28 is located within the range of the diameter of the small diameter portion 52. In this state, the rotary tool 50 is moved along the joining line of the butt portion while rotating.
[0023]
When the friction stir welding on one surface side is completed, the hollow members 10 and 20 are turned upside down and the friction stir welding is performed in the same manner.
[0024]
Next, the convex portions 17 and 27 located on the outer surface side of the vehicle body 500 are cut so that the outer surface of the joint portion is flush with the outer surfaces of the face plates 11 and 21 (12 and 22).
According to this, even if the face plate 21 (22) is to be deformed by frictional heat generated by friction stir welding, the convex portion 28 and the groove 18 are fitted together, so that the face plate 21 (22) is prevented from moving in the vertical direction. Or suppress. For this reason, joining with few steps can be performed between the face plate 11 (12) and the face plate 21 (22).
[0025]
For this reason, after the friction stir welding, it is possible to reduce the cutting work to reduce the step. For this reason, it can be made inexpensive. Further, the connection plate orthogonal to the face plates 21 and 22 at the end of the hollow shape member 20 can be removed in advance. For this reason, the hollow shape member 20 can be made inexpensive and lightweight.
[0026]
When the axis of the rotary tool 50 is positioned on the extension line of the center C of the thickness of the connection plate 14, the groove 18 is positioned within the diameter range of the small diameter portion 52. The convex portion 28 is located within the range of the diameter of the small diameter portion 52. For this reason, even if there is a gap between the groove 18 and the convex portion 28, the gap is filled and joined. Even if the groove 18 and the convex portion 28 are not located within the range of the diameter of the small-diameter portion 52, the position and size of the groove 18 and the convex portion 28 are such that the groove 18 and the convex portion 28 are plastically flowed by the small-diameter portion 52. Determine the size.
[0027]
Since the rotary tool 50 is located on the extension line of the thickness of the connection plate 14, the load at the time of friction welding is supported by the connection plate 14, and the joint is rarely deformed. The connecting plate 14 has rigidity to support this load. It is preferable that the axis of the rotary tool 50 be positioned on an extension line of the center C of the thickness of the connection plate 14.
[0028]
To the portions of the convex portions 17 and 27 on the outer surface side of the extension lines of the outer surfaces of the face plates 11, 21, 12, and 22 (excluding the portions of the convex portions 17 and 27) (protrusion allowance portions of the convex portions 17 and 27) Since a part of the groove 18 and the convex part 28 is provided, the groove 18 and the convex part 28 having a required size can be easily provided.
It is desirable that the axial center of the rotary tool 50 and the ends of the convex portions 17 and 27 are substantially located on the extension line of the center C of the thickness of the connection plate 14.
[0029]
In the above embodiment, the groove 18 is provided in the concave portion of the hollow shape member 10 and the convex portion 28 is provided in the hollow shape member 20, but the convex portion is provided in the concave portion of the hollow shape member 10, and the face plate 21 of the hollow shape member 20 is provided. Grooves can be provided at the ends of 22. However, the former is considered to be accurate when producing extruded profiles.
[0030]
Further, a groove is provided on one face plate 11 side (one concave side), a convex part is provided on the other face plate 12 side (the other concave side), a convex part is provided on one face plate 21, and the other face plate 22 is provided. Grooves can be provided.
[0031]
The embodiment of FIGS. 4 and 5 will be described. The center of the depth of the groove 18 is located on the extension line of the center C of the thickness of the connection plate 14. For this reason, the end surfaces of the butted portions of the face plates 11 and 12 and the convex portion 17 protrude from the center C of the thickness of the connection plate 14 toward the end of the hollow shape member 10. The butted portion of the hollow shape member 20 is provided correspondingly. That is, the end surfaces of the butted portions of the face plates 21 and 22 and the convex portion 27 (excluding the convex portion 28) are located on the other end side in the width direction of the hollow shape member 10 on the extension line of the center C of the thickness of the connection plate 14. It protrudes. For this reason, the width of the convex portion 17 is larger than the width of the convex portion 27.
[0032]
Friction stir welding is performed with the axis of the rotary tool 50 positioned on the extension line of the center C of the thickness of the connection plate 14. At the time of friction stir welding, the position of the butted portion of the convex portions 17 and 27 is obtained, and the position offset by a predetermined amount from the position toward the hollow shape 10 is set as the position of the rotary tool 50.
According to this, the allowable amount of positional deviation of the axial center of the rotary tool 50 (small diameter portion 52) with respect to the groove 18 and the convex portion 28 can be increased.
It is desirable that the axial center of the rotary tool 50 and the center of the depth of the groove 18 are substantially located on the extension line of the center C of the thickness of the connection plate 14.
[0033]
In each of the above embodiments, the connection plate 14 is provided to support the load during friction stir welding. However, the connection plate 14 can be removed if a support member is arranged in the space consisting of the face plates 11, 12, 21, 22 and the connection plates 13, 23 to support the load. The positions of the end portions in the width direction of the hollow members 10 and 20 (the positions of the grooves 18 and the projections 28, that is, the positions of the butted portions) are substantially at the same position. The support member is placed on the lower face plates 12 and 22, for example.
[0034]
The technical scope of the present invention is not limited to the language described in each claim of the claims or the language described in the means for solving the problem, and is also within a range easily replaced by those skilled in the art. It extends.
[0035]
【The invention's effect】
According to the present invention, lightweight and good friction stir welding can be performed.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a joint portion of a hollow member according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of the entire joint of the hollow profile shown in FIG.
FIG. 3 is a perspective view of a vehicle body of a railway vehicle.
FIG. 4 is a longitudinal sectional view of a joint portion of a hollow member 10 according to another embodiment of the present invention.
5 is a longitudinal sectional view of a joint portion of a hollow shape member 20 used in the joint portion of FIG.
[Explanation of symbols]
10, 20: Hollow profile, 11, 12, 21, 22: Face plate, 15: Projection piece, 17, 27: Convex part, 18: Groove, 28: Convex part, 50: Rotating tool, 51: Large diameter part, 52: Small diameter part.

Claims (6)

２つの面板と、
前記２つの面板を接続する接続板とからなる摩擦攪拌接合用中空形材において、前記２つの面板は中空形材の幅方向端部が突合せ部となっており、
前記接続板は、
前記２つの面板を接続するものであって、少なくとも一端は前記面版の突合せ部を除いた位置に接続した第１の接続板と、
前記２つの面板の突合せ部同士を接続するものであって、前記面板に実質的に直交した第２の接続板と、からなり、
前記第２の接続板と前記２つの面板の突合せ部との接続部には、中空形材の幅方向の外方および厚さ方向の外方に向けて開口した凹部が形成されており、
前記２つの面板のうちの一方の面板の突合せ部と前記第２の接続板との接続部に形成された前記凹部には、溝または凸部が形成されており、
前記溝は、中空形材の幅方向の端部側に向けて開口しており、
前記凸部は、中空形材の幅方向の端部側に向けて突出していること、
を特徴とする摩擦攪拌接合用中空形材。Two faceplates,
In the hollow shape member for friction stir welding composed of the connection plate connecting the two face plates, the two face plates have a butt portion at the end in the width direction of the hollow shape material,
The connecting plate is
A first connecting plate for connecting the two face plates, wherein at least one end is connected to a position excluding the butted portion of the face plate;
Connecting the butted portions of the two face plates, and comprising a second connection plate substantially orthogonal to the face plate,
In the connecting portion between the second connecting plate and the butted portion of the two face plates, a concave portion is formed that opens outward in the width direction and outward in the thickness direction of the hollow shape member,
A groove or a convex portion is formed in the concave portion formed in the connecting portion between the butted portion of one of the two face plates and the second connecting plate,
The groove is open toward the end in the width direction of the hollow shape member,
The protrusion protrudes toward the end in the width direction of the hollow shape member,
A hollow shape material for friction stir welding characterized by 請求項１の摩擦攪拌接合用中空形材において、前記第２の接続板の板厚の延長線上に、前記溝または前記凸部があること、を特徴とする摩擦攪拌接合用中空形材。The hollow shape member for friction stir welding according to claim 1, wherein the groove or the convex portion is on an extension line of the thickness of the second connection plate. 請求項１の摩擦攪拌接合用中空形材において、前記第２の接続板の板厚の実質的な中心の延長線上に、前記溝または前記凸部があること、を特徴とする摩擦攪拌接合用中空形材。  The hollow shape member for friction stir welding according to claim 1, wherein the groove or the convex portion is on an extension line of a substantial center of the thickness of the second connection plate. Hollow profile. 請求項１の摩擦攪拌接合用中空形材において、前記第２の接続板の板厚の実質的な中心の延長線上に、前記溝の深さの中心または前記凸部の突出代の中心があること、を特徴とする摩擦攪拌接合用中空形材。  2. The hollow shape member for friction stir welding according to claim 1, wherein the center of the depth of the groove or the center of the protrusion of the protrusion is on an extension line of the substantial center of the thickness of the second connection plate. A hollow shape material for friction stir welding characterized by that. 請求項１の摩擦攪拌接合用中空形材において、前記第２の接続板と前記２つの面板の突合せ部との接続部には、中空形材の厚さ方向に突出する第２の凸部が形成されており、
前記第２の凸部に前記凹部が形成されており、
前記溝の一部または前記凸部の一部は、前記第２の凸部の突出代の範囲に位置していること、
を特徴とする摩擦攪拌接合用中空形材。2. The hollow shape member for friction stir welding according to claim 1, wherein a second convex portion projecting in a thickness direction of the hollow shape material is provided at a connection portion between the second connection plate and the butted portion of the two face plates. Formed,
The recess is formed in the second protrusion,
Some of a part or the convex portion of the groove, that is positioned within the range of the projecting margin of the second convex portion,
A hollow shape material for friction stir welding characterized by 請求項１の摩擦攪拌接合用中空形材において、前記第２の接続板と前記２つの面板の突合せ部との接続部の凹部のうちの一方向の凹部には、前記溝が形成されており、
他方の凹部には、前記凸部が形成されていること
を特徴とする摩擦攪拌接合用中空形材。The hollow shape member for friction stir welding according to claim 1 , wherein the groove is formed in a concave portion in one direction among the concave portions of the connecting portion between the second connecting plate and the butted portion of the two face plates. ,
The hollow part for friction stir welding , wherein the convex part is formed in the other concave part .
JP2001117051A 2001-04-16 2001-04-16 Hollow profile for friction stir welding Expired - Lifetime JP3751216B2 (en)

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