JP4218365B2

JP4218365B2 - Double skin panel and friction stir welding method thereof

Info

Publication number: JP4218365B2
Application number: JP2003033123A
Authority: JP
Inventors: 純原; 久司堀; 喬石山
Original assignee: Nippon Light Metal Co Ltd
Current assignee: Nippon Light Metal Co Ltd
Priority date: 2003-02-12
Filing date: 2003-02-12
Publication date: 2009-02-04
Anticipated expiration: 2023-02-12
Also published as: JP2004243334A

Description

【０００１】
【発明の属する技術分野】
本発明は、摩擦攪拌接合に適したダブルスキンパネルに関し、また該ダブルスキンパネルを摩擦攪拌接合する方法に関する。
【０００２】
【従来の技術】
一対のダブルスキンパネル（以下、単に「パネル」ということがある。）を端部同士で突き合わせて摩擦攪拌接合する従来の方法を、図１４に示す。図１４（ａ）に示すように、一方のダブルスキンパネル１０'はアルミニウム合金製の中空押出形材であり、実質的に互いに平行な外板１１及び内板１２と、これらを接続するラチス１３，１３，…を備えており、さらに外板１１の端部と内板１２の端部とを接続する鉛直支持板１５を備えている。他方のダブルスキンパネル２０'も同様であり、外板２１、内板２２、ラチス２３，２３，…、鉛直支持板２５を備えている。
【０００３】
パネル１０'とパネル２０'とを接合するには、まず図１４（ｂ）に示すように、外板１１，２１を上にして鉛直支持板１５，２５を突き合わせ、その境界面上に攪拌ピン３２の中心線が位置するように回転ツール３０を外板１１，２１の突合せ部Ｔ１に上から押し込んで摩擦攪拌接合する。次に図１４（ｃ）に示すように、外板１１，２１が接合されたパネル１０'，２０'を上下反転させ内板１２，２２を上にして、鉛直支持板１５，２５の境界面上に攪拌ピン３２の中心線が位置するように回転ツール３０を内板１２，２２の突合せ部Ｔ２に上から押し込んで摩擦攪拌接合する。摩擦攪拌接合中に回転ツール３０から外板１１，２１又は内板１２，２２に作用する下向きの押圧力は、剛性のある鉛直支持板１５，２５で支持されるため、突合せ部Ｔ１，Ｔ２が沈み込むことはなく、外板１１，２１の外側面同士及び内板１２，２２の外側面同士が平坦な状態でパネル１０'，２０'が接合される（特許文献１参照）。
【０００４】
【特許文献１】
特許第３０１４６５４号公報（［０００９］−［００１２］，図１）
【０００５】
【発明が解決しようとする課題】
しかしながら、ダブルスキンパネル１０'の厚さ（外板１１の外側面と内板１２の外側面との間隔）は、不可避的な製造誤差等に起因して、部位によって若干異なっていることがある。パネル２０’についても同様である。また、パネル１０’の厚さとパネル２０’の厚さが互いに若干異なっていることもある。したがって現実には、たとえば図１５（ａ）に示すように、接合前のパネル１０’の外板１１の外側面１１ａとパネル２０’の外板２１の外側面２１ａとの間に段差Ｄが生じていることが多い。そして、このまま摩擦攪拌接合すると、図１５（ｂ）に示すように、外板１１の外側面１１ａと外板２１の外側面２１ａとの間が段違いになったままパネル１０’，２０’が接合されてしまうので、製品として使いものにならなくなってしまう。
【０００６】
なお、このような問題は、ここで例示したような押出形材からなるダブルスキンパネルの摩擦攪拌接合に限らず、実質的に互いに平行な外板及び内板を備えるあらゆるダブルスキンパネル（たとえばハニカムパネル等）の摩擦攪拌接合において妥当する。
【０００７】
本発明はこのような事情に鑑み、接合前に端部同士で突き合わせた状態で外側面間に段差があっても、接合後にはその段差が残らないように平坦に摩擦攪拌接合することのできるダブルスキンパネルを提案し、また、このようなダブルスキンパネルを摩擦攪拌接合する方法を提案するものである。
【０００８】
【課題を解決するための手段】
すなわち、本発明に係るダブルスキンパネルは、実質的に互いに平行な金属製の外板及び内板と、これらを接続する接続部とを備え、前記接続部が、その位置における前記外板と前記内板との間隔を調節可能に形成されているものである。
【０００９】
かかるダブルスキンパネルは、接合中に、外板及び内板は基本的に変形せず接続部が変形することにより段差を吸収する構造となっている。そして、外板と内板は実質的に互いに平行である。「実質的に互いに平行」とは、外板と内板とが完全に平行である状態の他、不可避的な製造誤差等に起因して外板と内板とが厳密には平行でなく僅かに傾斜した状態や、当初から敢えて外板と内板とを僅かに傾斜させた状態を含む。そして、外板と内板とは接続部で接続されており、接続部における外板と内板との間隔（接続部位置におけるダブルスキンパネルの厚さ）は調節可能となっている。接続部は通常、回転ツールから伝達される押圧力の作用線上から外れる部分を少なくとも一部に含む。換言すれば、接合中に回転ツールの押圧力を剛的に支持する断面部分を、ダブルスキンパネルの端部に設ける必要がなくなる。なお、回転ツールで摩擦攪拌接合される対象となる外板及び内板は金属製であるが、接合されない接続部は金属製に限定されない。
【００１０】
本発明に係るダブルスキンパネルの摩擦攪拌接合方法は、このような構造のダブルスキンパネルを一対用意し、それぞれの外板の端部同士及び内板の端部同士を突き合わせ、突合せ部に外側から回転ツールを押し込んで外板同士又は内板同士を摩擦攪拌接合するものである。すると、たとえ接合前において各ダブルスキンパネルの外板と内板とが僅かに傾斜していたり両ダブルスキンパネルの厚さが僅かに異なっていて、両外板の外側面間又は両内板の外側面間に段差があったとしても、接合中及び接合後には両外板の外側面間の段差及び両内板の外側面間の段差がなく平坦になるように調節しながら、回転ツールから伝達される内向きの押圧力を各ダブルスキンパネルの接続部で支持し、外板同士又は内板同士を摩擦攪拌接合することができる。もちろん、接合後に外板の外側面同士及び内板の外側面同士が平坦になるように、当初から敢えて外板と内板とを僅かに傾斜させておいたり、当初から一対のダブルスキンパネルの厚さを敢えて僅かに異ならせておいてもよい。
【００１１】
したがって、本発明に係るダブルスキンパネルないしその摩擦攪拌接合方法によれば、製品の外観がよくなり、歩留まりを格段に向上させることができる。
【００１２】
なお、接続部の位置や数、断面形状等は適宜定められるが、摩擦攪拌接合時に回転ツールから伝達される内向きの押圧力を支持するという機能に鑑みれば、接続部は、外板の端部と内板の端部とを接続するように形成されていることが好ましい。この場合、回転ツールから伝達される押圧力の作用線上又はその近傍に接続部が位置することとなるので、安定的な接合が可能となる。
【００１３】
また、特に接続部を断面弧状に形成すると、回転ツールから伝達される内向きの押圧力を各ダブルスキンパネルの接続部で調節支持して摩擦攪拌接合することが容易となり、曲率や板厚の調節によって接続部の変形度合も容易に設定できる。このような断面弧状の接続部は、ダブルスキンパネル全体がアルミニウム合金製の押出形材であれば、容易に形成することができる。
【００１４】
また、摩擦攪拌接合時には回転ツールが押し込まれる部分のメタルが多少流出してしまうが、厚さ方向に突出する凸条（厚肉部）を外板の端部及び内板の端部に沿って形成しておけば、この凸条分の余分なメタルが流出したメタルを補充するので、接合不良が発生せず接合後の外観もよくなる。凸条は外向きに形成しても内向きに形成してもよく、また、接続部と一体に形成しても別体に形成してもよい。
【００１５】
また、各ダブルスキンパネルの外板の端部及び内板の端部にそれぞれ係合部を形成しておけば、一対のダブルスキンパネルの端部同士を突き合わせて摩擦攪拌接合したときに、回転ツールから伝達される内向きの押圧力によって接続部が変形し、ちょうど外板の外側面同士及び内板の外側面同士が平坦になった状態で両パネルを位置決めすることができるので、安定的な接合が可能となる。
【００１７】
【発明の実施の形態】
以下、添付図面を参照しつつ、本発明の実施の形態を詳細に説明する。なお、説明において、同一要素には同一の符号を用い、重複する説明は省略するものとする。
【００１８】
図１は、本発明に係るダブルスキンパネルの第一実施形態を表す斜視図である。同図に示すように、一方のパネル１０はアルミニウム合金製の中空押出形材であり、実質的に互いに平行な外板１１及び内板１２と、これらを接続するラチス１３，１３，…を備えており、さらに接合端部には接続部１４，１４が形成されている。このパネル１０と端部同士で突き合わされて摩擦攪拌接合される他方のパネル２０も同様であり、外板２１と、内板２２と、ラチス２３，２３，…と、接続部２４，２４とを備えている。パネル１０の接続部１４は、外板１１の端部と内板１２の端部とを接続する断面円弧形状であり、同様にパネル２０の接続部２４は、外板２１の端部と内板２２の端部とを接続する断面円弧形状である。
【００１９】
このようなパネル１０とパネル２０とを端部同士で突き合わせて摩擦攪拌接合するには、まず図２（ａ）に示すように、平坦な接合テーブル（図示せず）上で外板１１，２１を上にした状態でパネル１０，２０の端部同士を突き合わせて固定する。このとき、外板１１の端部と外板２１の端部とが実質的に接触して突合せ部Ｔ１となり、内板１２の端部と内板２２の端部とが実質的に接触して突合せ部Ｔ２となっている。現実にはこの状態で、不可避的な製造誤差等に起因してパネル１０，２０の厚さが若干異なり、外板１１の外側面１１ａと外板２１の外側面２１ａとの間に段差が生じていることが多い。この段差は極めて大きいものから、一見しただけでは判別できない程度の小さなものまで多種多様であるが、ここでは説明の便宜上、段差を極めて大きく図示している。以下も同様である。
【００２０】
次に、図２（ｂ）に示すように、パネル１０，２０の外板１１，２１を外側から摩擦攪拌接合する。摩擦攪拌接合のための回転ツール３０は、径大のツール本体３１と、このツール本体３１の先端面から同軸で突出する径小の攪拌ピン３２とを備えており、ツール本体３１の先端面周囲にはショルダー部３３が形成されている。このような回転ツール３０を用いて、外板１１，２１の外側（図では上側）から突合せ部Ｔ１に対して、中心軸まわりに高速回転する回転ツール３０の攪拌ピン３２を挿入するとともにショルダー部３３を外板１１，２１の外側面１１ａ，２１ａに若干押圧した状態で、外板１１，２１の突合せラインに沿って回転ツール３０を紙面直交方向に移動させることにより、外板１１，２１の突合せ部Ｔ１を外側から摩擦攪拌接合するのである。
【００２１】
摩擦攪拌接合時には、パネル１０，２０の突合せ部Ｔ１に回転ツール３０からの内向き（図では下向き）の押圧力が作用するが、この押圧力は接続部１４，２４で支持される。ここで、接続部１４，２４は断面円弧形状であり、パネル１０，２０の厚さ方向（図では上下方向）に比較的撓み易くなっているので、回転ツール３０からの内向きの押圧力を受けた接続部１４，２４はそれぞれ、パネル１０の外板１１の外側面１１ａとパネル２０の外板２１の外側面２１ａとを平坦にするように撓み変形する。つまり、接合中に、外板１１，２１及び内板１２，２２は基本的に変形せず接続部１４，２４が変形することにより段差を吸収することとなり、接続部１４の撓み量は、接続部２４の撓み量に段差分を加えたものとなる。したがって、外板１１の外側面１１ａと外板２１の外側面２１ａとの間の段差を接続部１４，２４の撓み変形で吸収しながら突合せ部Ｔ１を接合することができ、接合後には図２（ｃ）に示すように、外板１１の外側面１１ａと外板２１の外側面２１ａとが実質的に平坦になる。
【００２２】
次に、図３（ａ）に示すように、外板１１，２１が接合されたパネル１０，２０を上下反転させて内板１２，２２を上にした状態で、内板１２，２２の突合せ部Ｔ２を外側から摩擦攪拌接合する。なお、外板１１，２１が接合された後でパネル１０，２０を上下反転させると、内板１２の外側面１２ａと内板２２の外側面２２ａとの間には段差がなく平坦になっているが、仮に平坦になっておらず段差があったとしても、外板１１，２１の突合せ部Ｔ１を摩擦攪拌接合するときと同様、接続部１４，２４の撓み変形でその段差を吸収しながら突合せ部Ｔ２を接合すればよい。突合せ部Ｔ２の接合後の状態を図３（ｂ）に示す。
【００２３】
このように、接合前におけるパネル１０の厚さとパネル２０の厚さが不可避的な製造誤差等に起因して若干異なり、外板１１の外側面１１ａと外板２１の外側面２１ａとの間、内板１２の外側面１２ａと内板２２の外側面２２ａとの間に段差があったとしても、外板１１，２１と内板１２，２２とを接続する接続部１４，２４が変形しながら回転ツール３０からの内向きの押圧力を支持することにより、接合中及び接合後には、外板１１の外側面１１ａと外板２１の外側面２１ａとの間、内板１２の外側面１２ａと内板２２の外側面２２ａとの間の段差をなくして平坦にすることができる。
【００２４】
なお、ここでは突合せ部Ｔ１を接合した後に、パネル１０，２０を上下反転して突合せ部Ｔ２を接合しているが、図４に示すように、突合せ部Ｔ１と突合せ部Ｔ２を同時に接合するようにしてもよい。
また、本実施形態では、不可避的な製造誤差等によってパネル１０，２０の厚さが異なっている場合を想定しているが、もちろん、当初から敢えてパネル１０，２０の厚さを僅かに異ならせておいてもよい。
【００２５】
続いて、本発明に係るダブルスキンパネルの第二実施形態を説明する。第一実施形態ではパネル１０の外板１１と内板１２とが平行であるとともに、パネル２０の外板２１と内板２２とが平行であり、しかもパネル１０，２０の厚さが若干異なっていたが、本実施形態では図５に示すように、外板１１と内板１２とが若干傾斜してパネル１０の厚さが端部に向かって徐々に大きくなっているとともに、外板２１と内板２２とが若干傾斜してパネル２０の厚さが端部に向かって徐々に大きくなっており、しかもパネル１０，２０を端部同士で突き合わせた状態で突合せ部に段差が生じている。このような場合も、第一実施形態と同様、撓み変形可能な接続部１４，２４で回転ツール３０の押圧力を調節支持することにより、接合中及び接合後には、外板１１の外側面１１ａと外板２１の外側面２１ａとの間、内板１２の外側面１２ａと内板２２の外側面２２ａとの間の段差をなくして平坦にすることができる。
【００２６】
図６は、本発明に係るダブルスキンパネルの第三実施形態を表す断面図である。本実施形態は第一実施形態と略同様であるが、接続部１４，２４が外板１１，２１の端部と内板１２，２２の端部とを接続するようになっていない点が異なる。つまり、本実施形態の接続部１４，２４は、外板１１，２１の端部から少し離れた位置と内板１２，２２の端部から少し離れた位置とを接続している。この場合であっても、上記各実施形態と同様、撓み変形可能な接続部１４，２４で回転ツール３０の押圧力を調節支持することにより、接合中及び接合後には、外板１１の外側面１１ａと外板２１の外側面２１ａとの間、内板１２の外側面１２ａと内板２２の外側面２２ａとの間の段差をなくして平坦にすることができる。
【００２７】
図７（ａ）は、本発明に係るダブルスキンパネルの第四実施形態を表す断面図である。本実施形態では、外板１１，２１の端部にそれぞれ合决り（あいじゃくり）形状の係合部１１ｂ，２１ｂが形成されており、係合部１１ｂ，２１ｂが互いに係合した状態で外板１１，２１の外側面１１ａ，２１ａが平坦になるようになっている。同様に、内板１２，２２の端部にもそれぞれ合决り形状の係合部１２ｂ，２２ｂが形成されており、係合部１２ｂ，２２ｂが互いに係合した状態で、内板１２，２２の外側面１２ａ，２２ａが平坦になるようになっている。つまり、係合部１１ｂ，２１ｂ，１２ｂ，２２ｂは位置決めの役割を果たす。
したがって、たとえば同図の場合、接合中に回転ツール３０から伝達される押圧力によって接続部１４が内向きに撓み、ちょうど外板１１の外側面１１ａと外板２１の外側面２１ａとが平坦になったときに係合部１１ｂ，２１ｂが互いに係合し、この状態で位置決めされてそれ以後は互いにずれないようになるので、外板１１の外側面１１ａと外板２１の外側面２１ａとが平坦な状態で摩擦攪拌接合されるときの姿勢が安定し、正確かつ確実に段差を解消することができる。
【００２８】
図７（ｂ）は、本発明に係るダブルスキンパネルの第五実施形態を表す断面図である。本実施形態は、係合部１１ｂ，２１ｂ，１２ｂ，２２ｂがテーパ形状であることを除けば、第四実施形態と同様である。
【００２９】
図８（ａ）は、本発明に係るダブルスキンパネルの第六実施形態を表す断面図である。本実施形態では、外板１１，２１の端部に沿って厚さ方向外向きに突出する凸条（厚肉部）１１ｃ，２１ｃが形成されている。
凸条１１ｃ，２１ｃがない状態で、外板１１，２１の突合せ部に回転ツール３０を押し込んで摩擦攪拌接合すると、突合せ部のメタルが塑性流動して内向きに押し流され、突合せ部に空孔が発生して接合不良となったり、突合せ部が凹んで外観不良となることがある。しかし、本実施形態のように凸条１１ｃ，２１ｃを形成しておけば、押し流された体積分のメタルをこの凸条１１ｃ，２１ｃの余分なメタルが補うので、突合せ部に空孔を発生させずに良好な接合を行うことができ、接合後の突合せ部を凹ませずに外観良好とすることができる。接合後に外板１１，２１の外側面１１ａ，２１ａに突出する不要な部分があれば、グラインダ等を用いてそれを切削して平坦にする。なお、ここでは外板１１，２１の端部に凸条１１ｃ，２１ｃが形成されているが、もちろん内板１２，２２の端部に凸条を形成することもできる。
【００３０】
図８（ｂ）は、本発明に係るダブルスキンパネルの第七実施形態を表す断面図である。本実施形態は、外板１１，２１の端部に沿って厚さ方向に突出する凸条１１ｃ，２１ｃが形成されている点で第六実施形態と同様であるが、凸条１１ｃ，２１ｃが内向きに突出している点で異なる。つまり本実施形態では、外板１１，２１の端部と内板１２，２２の端部とを接続する接続部１４，２４の板厚が、外板１１，２１と交差する部分及び内板１２，２２と交差する部分において大きくなっており、これが外板１１，２１の端部に沿って厚さ方向内向きに突出する凸条１１ｃ，２１ｃ及び内板１２，２２の端部に沿って厚さ方向内向きに突出する凸条１２ｃ，２２ｃとなっている。
したがって、摩擦攪拌接合時に押し流された体積分のメタルは凸条１１ｃ，２１ｃ，１２ｃ，２２ｃの余分なメタルによって補われ、突合せ部に空孔を発生させずに良好な接合を行うことができる。
【００３１】
なお、第六実施形態及び第七実施形態では凸条１１ｃ，２１ｃ，１２ｃ，２２ｃが接続部１４，２４と一体形成されているが、これらを別体に形成してもよいことは言うまでもない。
【００３２】
図９は、本発明に係るダブルスキンパネルの第八実施形態を表す断面図である。上記各実施形態では接続部１４，２４が断面円弧形状であったが、本実施形態では接続部１４，２４が断面くの字形状となっている。その他の点は、上記各実施形態と同様である。
【００３３】
図１０は、本発明に係るダブルスキンパネルの第九実施形態を表す断面図である。第一乃至第七実施形態のパネルは、接合中に、外板及び内板が基本的に変形せず接続部が変形することにより段差を吸収する構造であったが、本実施形態のパネルは、接合中に外板又は内板が変形することにより段差を吸収する構造である。つまり本実施形態のパネルは、外板１１，２１の端部又は内板１２，２２の端部が内向きに変形可能になっており、このことを利用して一対のダブルスキンパネル１０，２０の外板１１，２１の外側面１１ａ，２１ａ間の段差及び内板１２，２２の外側面１２ａ，２２ａ間の段差をなくすようにしたものである。
【００３４】
ここでは図１０（ａ）に示すように、一方のパネル１０はアルミニウム合金製の中空押出形材であり、実質的に互いに平行な外板１１及び内板１２と、これらを接続するラチス１３，１３，…とを備えており、他方のパネル２０も同様に、外板２１及び内板２２と、ラチス２３，２３，…とを備えている。そして、パネル１０の内板１２の端部は内向き（図では上向き）に撓み変形可能に形成され、パネル２０の外板２１の端部も内向き（図では下向き）に撓み変形可能に形成されている。また、外板１１，２１の端部には係合部１１ｂ，２１ｂが形成され、内板１２，２２の端部には係合部１２ｂ，２２ｂが形成されている。
【００３５】
このようなパネル１０とパネル２０とを端部同士で突き合わせて摩擦攪拌接合するには、まず、平坦な接合テーブル（図示せず）上で外板１１，２１を上にして、パネル１０，２０の端部同士を突き合わせて固定する。このとき、係合部１２ｂ，２２ｂは互いに係合して、内板１２，２２の外側面１２ａ，２２ａ間には段差がないが、外板１１の外側面１１ａと外板２１の外側面２１ａとの間には不可避的な段差が生じているものとする。
【００３６】
次に、図１０（ｂ）に示すように、パネル１０，２０の外板１１，２１を外側から摩擦攪拌接合する。摩擦攪拌接合時には、パネル１０，２０の突合せ部Ｔ１に回転ツール３０から伝達される内向きの押圧力が作用する。このとき、回転ツール３０から伝達される押圧力を受けた外板２１の端部は、図１１に示すように、あたかも片持梁の先端に集中荷重が作用したときのように内向き（図では下向き）に変形し、係合部１１ｂ，２１ｂが互いに係合したときにちょうど外板１１，２１の外側面１１ａ，２１ａ間の段差がなく実質的に平坦になる。したがって、外板１１の外側面１１ａと外板２１の外側面２１ａとの間の段差を外板２１の端部の内向きの撓み変形で吸収しながら突合せ部Ｔ１を接合することができ、接合後には段差がなくなる。また、内板１２，２２の突合せ部Ｔ２についても同様に、内板１２の内向きの撓み変形で吸収しながら摩擦攪拌接合すればよい。
【００３７】
なお、ここでパネル２０に着目すると、外板２１の端部のみが内向きに変形し内板２２の端部は内向きに変形しない構造となっているが、この他、たとえば図１２に示すように、外板２１の端部及び内板２２の端部の双方が内向きに変形する構造であってもよい。つまり、一枚のパネルについて、外板の端部と内板の端部のうちの一方又は双方が内向きに変形するようになっていればよい。なお、図１２からも分かるように、パネル１０，２０の端部同士を突き合わせた状態で、外板１１，２１の突合せ部Ｔ１と、内板１２，２２の突合せ部Ｔ２とが、同一鉛直面上に位置する必要はなく、パネルの幅方向にずれていても構わない。
【００３８】
また、図１３に示すように、位置決めのための係合部１１ｂ，２１ｂ，１２ｂ，２２ｂを省略することも可能である。さらに、図示はしないが、上記各実施形態で説明したような凸条を外板１１，２１の端部や内板１２，２２の端部に沿って形成してもよい。
【００３９】
以上、本発明の各実施形態を説明してきたが、本発明はこれらに限定されるものではなく、上記各実施形態中の技術要素を適宜組み合わせる等、発明の趣旨に応じた適宜の変更実施が可能であることはいうまでもない。
さらに具体的に言えば、一対のパネルの断面形状は左右対称である必要はない。ラチスは形状、寸法、位置、材質等を自由に定めることができ、なくてもよい。外板及び内板の金属組成は同一でもよいし異なっていてもよい。接続部の形状、寸法、位置、材質等も適宜定められる。特に、接続部が断面円弧形状である場合の曲率半径は自由に定められるし、断面円弧形状でなく断面楕円弧形状などとしてもよい。パネルは押出形材に限らず、平行な二枚の板材を備えるダブルスキンパネルであれば、ハニカムパネル等であってもよい。
【００４０】
【発明の効果】
以上のように、本発明によれば、接合前にダブルスキンパネルを端部同士で突き合わせた状態で外側面間に段差があっても、接合後にはその段差が残らないように平坦に摩擦攪拌接合することができるので、製品の外観がよくなり、歩留まりを格段に向上させることができる。
【図面の簡単な説明】
【図１】本発明に係るダブルスキンパネルの第一実施形態を表す斜視図である。
【図２】図１のパネルを摩擦攪拌接合する方法の一実施形態を説明するための手順断面図である。
【図３】図２に続く手順断面図である。
【図４】図１のパネルを摩擦攪拌接合する方法の他の実施形態を説明するための断面図である。
【図５】本発明に係るダブルスキンパネルの第二実施形態を表す断面図である。
【図６】本発明に係るダブルスキンパネルの第三実施形態を表す断面図である。
【図７】（ａ），（ｂ）はそれぞれ、本発明に係るダブルスキンパネルの第四実施形態、第五実施形態を表す断面図である。
【図８】（ａ），（ｂ）はそれぞれ、本発明に係るダブルスキンパネルの第六実施形態、第七実施形態を表す断面図である。
【図９】本発明に係るダブルスキンパネルの第八実施形態を表す断面図である。
【図１０】同第九実施形態を表す断面図である。
【図１１】同要部拡大図である。
【図１２】本発明に係るダブルスキンパネルの他の実施形態を表す断面図である。
【図１３】本発明に係るダブルスキンパネルのさらに他の実施形態を表す断面図である。
【図１４】従来のダブルスキンパネルの摩擦攪拌接合方法を説明する断面図である。
【図１５】従来のダブルスキンパネルの摩擦攪拌接合方法の問題点を説明する断面図である。
【符号の説明】
１０，２０ … ダブルスキンパネル
１１，２１ … 外板
１１ａ，２１ａ … 外側面
１１ｂ，２１ｂ … 係合部
１１ｃ，２１ｃ … 凸条
１２，２２ … 内板
１２ａ，２２ａ … 外側面
１２ｂ，２２ｂ … 係合部
１２ｃ，２２ｃ … 凸条
１３，２３ … ラチス
１４，２４ … 接続部
１５，２５ … 鉛直支持板
３０ … 回転ツール
３１ … ツール本体
３２ … 攪拌ピン
３３ … ショルダー部
Ｄ … 段差
Ｔ１，Ｔ２ … 突合せ部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a double skin panel suitable for friction stir welding, and also relates to a method for friction stir welding of the double skin panel.
[0002]
[Prior art]
FIG. 14 shows a conventional method in which a pair of double skin panels (hereinafter sometimes simply referred to as “panels”) are brought into contact with each other at the ends and friction stir welding is performed. As shown in FIG. 14 (a), one double skin panel 10 'is a hollow extruded profile made of aluminum alloy, and an outer plate 11 and an inner plate 12 that are substantially parallel to each other, and a lattice 13 that connects them. , 13,... And a vertical support plate 15 that connects the end of the outer plate 11 and the end of the inner plate 12. The other double skin panel 20 ′ is similar, and includes an outer plate 21, an inner plate 22, lattices 23, 23,.
[0003]
In order to join the panel 10 'and the panel 20', first, as shown in FIG. 14 (b), the vertical support plates 15 and 25 are abutted with the outer plates 11 and 21 facing up, and the stirring pin is placed on the boundary surface. The rotary tool 30 is pushed into the abutting portion T1 of the outer plates 11 and 21 from above so that the center line of 32 is located, and friction stir welding is performed. Next, as shown in FIG. 14 (c), the panels 10 ′ and 20 ′ to which the outer plates 11 and 21 are joined are turned upside down so that the inner plates 12 and 22 face up, and the boundary surfaces of the vertical support plates 15 and 25. The rotary tool 30 is pushed into the abutting portion T2 of the inner plates 12 and 22 from above so that the center line of the agitation pin 32 is positioned above, and friction agitation welding is performed. Since the downward pressing force acting on the outer plates 11 and 21 or the inner plates 12 and 22 from the rotary tool 30 during the friction stir welding is supported by the rigid vertical support plates 15 and 25, the butt portions T1 and T2 are The panels 10 'and 20' are joined with the outer surfaces of the outer plates 11 and 21 and the outer surfaces of the inner plates 12 and 22 being flat without sinking (see Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent No. 3014654 ([0009]-[0012], FIG. 1)
[0005]
[Problems to be solved by the invention]
However, the thickness of the double skin panel 10 ′ (the distance between the outer surface of the outer plate 11 and the outer surface of the inner plate 12) may be slightly different depending on the part due to unavoidable manufacturing errors and the like. . The same applies to the panel 20 ′. Further, the thickness of the panel 10 'and the thickness of the panel 20' may be slightly different from each other. Therefore, in reality, as shown in FIG. 15A, for example, a step D is generated between the outer surface 11a of the outer plate 11 of the panel 10 ′ before joining and the outer surface 21a of the outer plate 21 of the panel 20 ′. There are many. When the friction stir welding is performed as it is, as shown in FIG. 15B, the panels 10 ′ and 20 ′ are joined while the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21 are in a step difference. As a result, it is no longer useful as a product.
[0006]
Such a problem is not limited to the friction stir welding of a double skin panel made of an extruded shape as exemplified here, but any double skin panel (for example, a honeycomb) having an outer plate and an inner plate that are substantially parallel to each other. Appropriate for friction stir welding of panels.
[0007]
In view of such circumstances, the present invention can perform friction stir welding flatly so that no step remains after joining even if there is a step between the outer surfaces in a state where the ends are butted together before joining. A double skin panel is proposed, and a method of friction stir welding such a double skin panel is proposed.
[0008]
[Means for Solving the Problems]
That is, the double skin panel according to the present invention includes a metal outer plate and an inner plate that are substantially parallel to each other, and a connection portion that connects them, and the connection portion includes the outer plate and the position at the position. The distance between the inner plate and the inner plate is adjustable.
[0009]
In such a double skin panel, the outer plate and the inner plate are basically not deformed during joining, and the connecting portion is deformed to absorb the step. The outer plate and the inner plate are substantially parallel to each other. “Substantially parallel to each other” means that the outer plate and the inner plate are not exactly parallel to each other due to unavoidable manufacturing errors in addition to the state where the outer plate and the inner plate are completely parallel. And a state where the outer plate and the inner plate are slightly inclined from the beginning. The outer plate and the inner plate are connected by a connecting portion, and the distance between the outer plate and the inner plate in the connecting portion (the thickness of the double skin panel at the connecting portion position) can be adjusted. The connection part usually includes at least a part that is off the line of action of the pressing force transmitted from the rotary tool. In other words, it is not necessary to provide a cross-sectional portion that rigidly supports the pressing force of the rotary tool during joining at the end of the double skin panel. In addition, although the outer plate and the inner plate to be subjected to friction stir welding with the rotary tool are made of metal, the connection portion that is not joined is not limited to metal.
[0010]
In the friction stir welding method for a double skin panel according to the present invention, a pair of double skin panels having such a structure is prepared, the ends of the outer plates and the ends of the inner plates are butted together, and the butted portions are externally contacted. A rotary tool is pushed in and frictional stir welding of outer plates or inner plates is performed. Then, even before joining, the outer skin and the inner skin of each double skin panel are slightly inclined or the thicknesses of both double skin panels are slightly different. Even if there is a step between the outer side surfaces, during and after joining, while adjusting so that there is no step between the outer side surfaces of both outer plates and the outer side surfaces of both inner plates, The transmitted inward pressing force is supported by the connecting portion of each double skin panel, and the outer plates or the inner plates can be friction stir welded. Of course, the outer plate and the inner plate are intentionally inclined slightly from the beginning so that the outer surfaces of the outer plates and the outer surfaces of the inner plates become flat after joining. You may dare to make the thickness slightly different.
[0011]
Therefore, according to the double skin panel or the friction stir welding method according to the present invention, the appearance of the product is improved and the yield can be remarkably improved.
[0012]
The position, number, cross-sectional shape, etc. of the connecting portion are appropriately determined, but in view of the function of supporting the inward pressing force transmitted from the rotary tool during friction stir welding, the connecting portion is the end of the outer plate. It is preferable to form so that a part and the edge part of an inner board may be connected. In this case, since the connecting portion is located on or near the action line of the pressing force transmitted from the rotary tool, stable joining is possible.
[0013]
In particular, when the connection part is formed in a cross-section arc shape, it becomes easy to adjust and support the inward pressing force transmitted from the rotary tool at the connection part of each double skin panel, and to perform friction stir welding. The degree of deformation of the connecting portion can be easily set by adjustment. Such a connection portion having an arcuate cross section can be easily formed if the entire double skin panel is an extruded shape made of an aluminum alloy.
[0014]
Also, during friction stir welding, the metal in the portion where the rotary tool is pushed out slightly flows out, but the protruding ridge (thick part) protruding in the thickness direction is along the end of the outer plate and the end of the inner plate. If it is formed, the metal from which the excess metal of the ridges flows out is replenished, so that no bonding failure occurs and the appearance after bonding is improved. The ridges may be formed outward or inward, and may be formed integrally with the connection portion or separately.
[0015]
In addition, if the engaging portions are formed at the end of the outer plate and the end of the inner plate of each double skin panel, the ends of the pair of double skin panels are brought into contact with each other and rotated when friction stir welding is performed. The connection part is deformed by the inward pressing force transmitted from the tool, and both panels can be positioned with the outer surfaces of the outer plates and the outer surfaces of the inner plates flattened. Can be joined.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same reference numerals are used for the same elements, and duplicate descriptions are omitted.
[0018]
FIG. 1 is a perspective view showing a first embodiment of a double skin panel according to the present invention. As shown in the figure, one panel 10 is an aluminum alloy hollow extruded shape member, and includes an outer plate 11 and an inner plate 12 that are substantially parallel to each other, and lattices 13, 13,. Furthermore, connecting portions 14 are formed at the joint end. This panel 10 and the other panel 20 that are abutted at the ends and friction stir welded are the same, and the outer plate 21, the inner plate 22, the lattices 23, 23,... I have. The connection portion 14 of the panel 10 has a circular arc shape that connects the end portion of the outer plate 11 and the end portion of the inner plate 12. Similarly, the connection portion 24 of the panel 20 is connected to the end portion of the outer plate 21 and the inner plate. The cross-sectional arc shape connects the end portions of 22.
[0019]
In order to frictionally stir and join the panel 10 and the panel 20 with each other at the ends, first, as shown in FIG. 2A, the outer plates 11 and 21 are placed on a flat joining table (not shown). With the side facing up, the ends of the panels 10 and 20 are butted together and fixed. At this time, the end portion of the outer plate 11 and the end portion of the outer plate 21 are substantially in contact with each other to form a butt portion T1, and the end portion of the inner plate 12 and the end portion of the inner plate 22 are substantially in contact with each other. It is a butt portion T2. Actually, in this state, the thicknesses of the panels 10 and 20 are slightly different due to inevitable manufacturing errors and the like, and a step is generated between the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21. There are many. There are various types of steps, from extremely large ones to small ones that cannot be discerned at first glance, but here the steps are shown extremely large for convenience of explanation. The same applies to the following.
[0020]
Next, as shown in FIG. 2B, the outer plates 11 and 21 of the panels 10 and 20 are friction stir welded from the outside. The rotary tool 30 for friction stir welding includes a large-diameter tool body 31 and a small-diameter stirring pin 32 that protrudes coaxially from the tip surface of the tool body 31. A shoulder portion 33 is formed. Using such a rotating tool 30, the stirring pin 32 of the rotating tool 30 that rotates at high speed around the central axis is inserted into the butting portion T1 from the outside (upper side in the drawing) of the outer plates 11 and 21, and the shoulder portion. 33 is slightly pressed against the outer surfaces 11a and 21a of the outer plates 11 and 21, and the rotary tool 30 is moved in the direction orthogonal to the paper surface along the butting line of the outer plates 11 and 21, thereby The butt portion T1 is friction stir welded from the outside.
[0021]
At the time of friction stir welding, an inward pressing force (downward in the drawing) from the rotary tool 30 acts on the abutting portion T1 of the panels 10 and 20, and this pressing force is supported by the connecting portions 14 and 24. Here, since the connection parts 14 and 24 have a circular arc shape and are relatively easy to bend in the thickness direction of the panels 10 and 20 (vertical direction in the figure), the inward pressing force from the rotary tool 30 is applied. The received connection portions 14 and 24 are bent and deformed so that the outer side surface 11a of the outer plate 11 of the panel 10 and the outer side surface 21a of the outer plate 21 of the panel 20 become flat. That is, during joining, the outer plates 11 and 21 and the inner plates 12 and 22 are basically not deformed and the connecting portions 14 and 24 are deformed to absorb the step, and the bending amount of the connecting portion 14 is determined by the connection amount. The amount of deflection of the portion 24 is added to the level difference. Therefore, the abutting portion T1 can be joined while absorbing the step between the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21 by the bending deformation of the connecting portions 14 and 24. FIG. As shown in (c), the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21 become substantially flat.
[0022]
Next, as shown in FIG. 3A, the panels 10 and 20 to which the outer plates 11 and 21 are joined are turned upside down so that the inner plates 12 and 22 face up. Part T2 is friction stir welded from the outside. When the panels 10 and 20 are turned upside down after the outer plates 11 and 21 are joined, there is no step between the outer surface 12a of the inner plate 12 and the outer surface 22a of the inner plate 22, and the surface becomes flat. However, even if there is a step that is not flat, it absorbs the step by bending deformation of the connection portions 14 and 24 as in the case of the friction stir welding of the butted portions T1 of the outer plates 11 and 21. What is necessary is just to join the butt | matching part T2. FIG. 3B shows a state after the joining of the butt portion T2.
[0023]
Thus, the thickness of the panel 10 before joining and the thickness of the panel 20 are slightly different due to inevitable manufacturing errors, etc., and between the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21, Even if there is a step between the outer surface 12 a of the inner plate 12 and the outer surface 22 a of the inner plate 22, the connecting portions 14 and 24 that connect the outer plates 11 and 21 and the inner plates 12 and 22 are deformed. By supporting the inward pressing force from the rotary tool 30, during and after joining, between the outer surface 11 a of the outer plate 11 and the outer surface 21 a of the outer plate 21, the outer surface 12 a of the inner plate 12 The level difference between the inner plate 22 and the outer surface 22a can be eliminated and the inner plate 22 can be made flat.
[0024]
Here, after joining the butting portion T1, the panels 10 and 20 are turned upside down to join the butting portion T2. However, as shown in FIG. 4, the butting portion T1 and the butting portion T2 are joined simultaneously. It may be.
In the present embodiment, it is assumed that the thicknesses of the panels 10 and 20 are different due to inevitable manufacturing errors or the like, but of course, the thicknesses of the panels 10 and 20 are slightly different from the beginning. You may keep it.
[0025]
Next, a second embodiment of the double skin panel according to the present invention will be described. In the first embodiment, the outer plate 11 and the inner plate 12 of the panel 10 are parallel, the outer plate 21 and the inner plate 22 of the panel 20 are parallel, and the thicknesses of the panels 10 and 20 are slightly different. However, in the present embodiment, as shown in FIG. 5, the outer plate 11 and the inner plate 12 are slightly inclined so that the thickness of the panel 10 gradually increases toward the end, and the outer plate 21 and The inner plate 22 is slightly inclined so that the thickness of the panel 20 gradually increases toward the end, and a step is generated in the butted portion in a state where the panels 10 and 20 are butted against each other. Also in such a case, the outer surface 11a of the outer plate 11 is joined during and after joining by adjusting and supporting the pressing force of the rotary tool 30 with the connecting portions 14 and 24 that can be flexibly deformed, as in the first embodiment. And the outer surface 21a of the outer plate 21, and the step between the outer surface 12a of the inner plate 12 and the outer surface 22a of the inner plate 22 can be made flat.
[0026]
FIG. 6 is a cross-sectional view showing a third embodiment of the double skin panel according to the present invention. This embodiment is substantially the same as the first embodiment except that the connection portions 14 and 24 do not connect the end portions of the outer plates 11 and 21 and the end portions of the inner plates 12 and 22. . That is, the connecting portions 14 and 24 of the present embodiment connect a position slightly away from the end portions of the outer plates 11 and 21 and a position slightly away from the end portions of the inner plates 12 and 22. Even in this case, the outer surface of the outer plate 11 is joined during and after joining by adjusting and supporting the pressing force of the rotary tool 30 by the connecting portions 14 and 24 that can be flexibly deformed as in the above embodiments. 11a and the outer surface 21a of the outer plate 21, and the step between the outer surface 12a of the inner plate 12 and the outer surface 22a of the inner plate 22 can be made flat.
[0027]
Fig.7 (a) is sectional drawing showing 4th embodiment of the double skin panel based on this invention. In the present embodiment, the end portions of the outer plates 11 and 21 are formed with engagement portions 11b and 21b having a joint shape, and the engagement portions 11b and 21b are engaged with each other. The outer surfaces 11a and 21a of the outer plates 11 and 21 are flat. Similarly, the end portions of the inner plates 12 and 22 are respectively formed with engagement portions 12b and 22b having a joint shape, and the inner plates 12 and 22 are engaged with each other with the engaging portions 12b and 22b engaged with each other. The outer side surfaces 12a and 22a are flat. That is, the engaging portions 11b, 21b, 12b, and 22b play a role of positioning.
Therefore, for example, in the case of the figure, the connecting portion 14 is bent inward by the pressing force transmitted from the rotary tool 30 during joining, and the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21 are flattened. Since the engaging portions 11b and 21b are engaged with each other and positioned in this state and are not displaced after that, the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21 are The posture when the friction stir welding is performed in a flat state is stable, and the step can be eliminated accurately and reliably.
[0028]
FIG.7 (b) is sectional drawing showing 5th embodiment of the double skin panel based on this invention. This embodiment is the same as the fourth embodiment except that the engaging portions 11b, 21b, 12b, and 22b are tapered.
[0029]
FIG. 8A is a cross-sectional view showing a sixth embodiment of the double skin panel according to the present invention. In the present embodiment, ridges (thick portions) 11c and 21c that protrude outward in the thickness direction along the end portions of the outer plates 11 and 21 are formed.
When the rotary tool 30 is pushed into the abutting portions of the outer plates 11 and 21 and the friction stir welding is performed without the protrusions 11c and 21c, the metal of the abutting portion is plastically flowed and pushed inward, and a hole is formed in the abutting portion. May occur, resulting in poor bonding, or the butt portion may be recessed and the appearance may be poor. However, if the ridges 11c and 21c are formed as in the present embodiment, the excess metal of the ridges 11c and 21c supplements the swept volume of metal, so that holes are generated in the butt portion. It is possible to perform good bonding without damaging, and to improve the appearance without denting the butted portion after bonding. If there is an unnecessary portion protruding on the outer surface 11a, 21a of the outer plate 11, 21 after joining, it is cut and flattened using a grinder or the like. Here, although the ridges 11c and 21c are formed at the ends of the outer plates 11 and 21, of course, the ridges can also be formed at the ends of the inner plates 12 and 22.
[0030]
FIG. 8B is a cross-sectional view showing a seventh embodiment of the double skin panel according to the present invention. This embodiment is the same as the sixth embodiment in that ridges 11c and 21c projecting in the thickness direction along the end portions of the outer plates 11 and 21 are formed, but the ridges 11c and 21c are It differs in that it protrudes inward. That is, in the present embodiment, the thickness of the connecting portions 14 and 24 that connect the end portions of the outer plates 11 and 21 and the end portions of the inner plates 12 and 22 is the portion where the outer plates 11 and 21 intersect and the inner plate 12. , 22 is increased at the portion intersecting with the protrusions 11c, 21c and the end portions of the inner plates 12, 22 projecting inward in the thickness direction along the end portions of the outer plates 11, 21. The ridges 12c and 22c protrude inward in the vertical direction.
Therefore, the metal of the volume swept away at the time of friction stir welding is supplemented by the extra metal of the ridges 11c, 21c, 12c, and 22c, and good bonding can be performed without generating holes in the butted portions.
[0031]
In the sixth embodiment and the seventh embodiment, the ridges 11c, 21c, 12c, and 22c are integrally formed with the connecting portions 14 and 24, but it goes without saying that these may be formed separately.
[0032]
FIG. 9 is a sectional view showing an eighth embodiment of the double skin panel according to the present invention. In each of the above embodiments, the connecting portions 14 and 24 have a circular arc shape in cross section. However, in the present embodiment, the connecting portions 14 and 24 have a cross-sectional shape. Other points are the same as those in the above embodiments.
[0033]
FIG. 10 is a cross-sectional view showing a ninth embodiment of the double skin panel according to the present invention. The panel of the first to seventh embodiments has a structure that absorbs the step by deforming the connecting portion without deforming the outer plate and the inner plate during joining, but the panel of the present embodiment is In this structure, the outer plate or the inner plate is deformed during joining to absorb the step. That is, in the panel of the present embodiment, the end portions of the outer plates 11 and 21 or the end portions of the inner plates 12 and 22 can be deformed inward, and this is used to make a pair of double skin panels 10 and 20. The steps between the outer surfaces 11a and 21a of the outer plates 11 and 21 and the steps between the outer surfaces 12a and 22a of the inner plates 12 and 22 are eliminated.
[0034]
Here, as shown in FIG. 10 (a), one panel 10 is a hollow extruded profile made of aluminum alloy, and an outer plate 11 and an inner plate 12 that are substantially parallel to each other, and a lattice 13 that connects them. .., And the other panel 20 similarly includes an outer plate 21 and an inner plate 22, and lattices 23, 23,. The end of the inner plate 12 of the panel 10 is formed so as to be able to bend and deform inward (upward in the drawing), and the end of the outer plate 21 of the panel 20 is also formed to be able to bend and deform inward (downward in the drawing). Has been. Engaging portions 11b and 21b are formed at the ends of the outer plates 11 and 21, and engaging portions 12b and 22b are formed at the ends of the inner plates 12 and 22, respectively.
[0035]
In order to abut the panel 10 and the panel 20 at the end portions and friction stir weld, first, the outer plates 11 and 21 are placed on a flat joining table (not shown), and the panels 10 and 20 are placed. The end portions of each other are butted and fixed. At this time, the engaging portions 12b and 22b are engaged with each other, and there is no step between the outer surfaces 12a and 22a of the inner plates 12 and 22, but the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21. It is assumed that there is an inevitable step between the two.
[0036]
Next, as shown in FIG. 10B, the outer plates 11 and 21 of the panels 10 and 20 are friction stir welded from the outside. During the friction stir welding, an inward pressing force transmitted from the rotary tool 30 acts on the abutting portion T1 of the panels 10 and 20. At this time, the end portion of the outer plate 21 that has received the pressing force transmitted from the rotary tool 30 faces inward as if a concentrated load is applied to the tip of the cantilever beam (see FIG. 11). When the engaging portions 11b and 21b are engaged with each other, there is no step between the outer surfaces 11a and 21a of the outer plates 11 and 21, and the surface becomes substantially flat. Therefore, the abutting portion T1 can be joined while absorbing the step between the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21 by the inward bending deformation of the end portion of the outer plate 21. There will be no steps later. Similarly, the abutting portion T2 of the inner plates 12 and 22 may be joined by friction stir welding while absorbing the inward bending deformation of the inner plate 12.
[0037]
If attention is paid to the panel 20 here, only the end portion of the outer plate 21 is deformed inward and the end portion of the inner plate 22 is not deformed inward. Thus, the structure which both the edge part of the outer plate 21 and the edge part of the inner board 22 deform | transform inward may be sufficient. That is, it is only necessary that one or both of the end portion of the outer plate and the end portion of the inner plate be deformed inward with respect to one panel. As can be seen from FIG. 12, the butted portions T1 of the outer plates 11 and 21 and the butted portions T2 of the inner plates 12 and 22 are in the same vertical plane in a state where the ends of the panels 10 and 20 are butted together. It does not have to be positioned above, and may be displaced in the width direction of the panel.
[0038]
Further, as shown in FIG. 13, the engaging portions 11b, 21b, 12b, and 22b for positioning can be omitted. Furthermore, although not shown in the drawings, the ridges described in the above embodiments may be formed along the end portions of the outer plates 11 and 21 and the end portions of the inner plates 12 and 22.
[0039]
The embodiments of the present invention have been described above. However, the present invention is not limited to these embodiments, and appropriate modifications according to the spirit of the invention, such as appropriately combining the technical elements in the above embodiments, may be made. It goes without saying that it is possible.
More specifically, the cross-sectional shapes of the pair of panels need not be symmetrical. The lattice can be freely determined in shape, size, position, material, etc., and may not be required. The metal composition of the outer plate and the inner plate may be the same or different. The shape, dimensions, position, material, etc. of the connecting portion are also determined as appropriate. In particular, the radius of curvature in the case where the connecting portion has a cross-sectional arc shape is freely determined, and may be a cross-sectional elliptical arc shape instead of the cross-sectional arc shape. The panel is not limited to an extruded shape, and may be a honeycomb panel or the like as long as it is a double skin panel including two parallel plates.
[0040]
【The invention's effect】
As described above, according to the present invention, even if there is a step between the outer surfaces in a state in which the double skin panels are butted against each other before joining, the friction stir is made flat so that the step does not remain after joining. Since it can join, the external appearance of a product improves and a yield can be improved significantly.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of a double skin panel according to the present invention.
FIG. 2 is a procedure cross-sectional view for explaining an embodiment of a method for friction stir welding of the panel of FIG.
FIG. 3 is a procedure sectional view following FIG. 2;
4 is a cross-sectional view for explaining another embodiment of the method of friction stir welding the panel of FIG.
FIG. 5 is a cross-sectional view showing a second embodiment of a double skin panel according to the present invention.
FIG. 6 is a cross-sectional view showing a third embodiment of a double skin panel according to the present invention.
7A and 7B are cross-sectional views showing a fourth embodiment and a fifth embodiment of a double skin panel according to the present invention, respectively.
8A and 8B are cross-sectional views showing a sixth embodiment and a seventh embodiment of the double skin panel according to the present invention, respectively.
FIG. 9 is a sectional view showing an eighth embodiment of a double skin panel according to the present invention.
FIG. 10 is a sectional view showing the ninth embodiment.
FIG. 11 is an enlarged view of the main part.
FIG. 12 is a cross-sectional view showing another embodiment of a double skin panel according to the present invention.
FIG. 13 is a cross-sectional view showing still another embodiment of a double skin panel according to the present invention.
FIG. 14 is a cross-sectional view illustrating a conventional friction stir welding method for a double skin panel.
FIG. 15 is a cross-sectional view illustrating a problem of a conventional friction stir welding method for a double skin panel.
[Explanation of symbols]
10, 20 ... Double skin panel
11, 21, ... outer plate
11a, 21a ... outer surface
11b, 21b ... engaging portion
11c, 21c ... ridge
12, 22 ... inner plate
12a, 22a ... outer side
12b, 22b ... engaging portion
12c, 22c ... ridge
13, 23 ... Lattice
14, 24 ... Connection part
15, 25 ... Vertical support plate
30 ... Rotating tool
31 ... Tool body
32… Stirring pin
33 ... Shoulder
D ... Level difference
T1, T2 ... Butting part

Claims

実質的に互いに平行な金属製の外板及び内板と、これらを接続する断面弧状または断面く字形状の接続部とを備え、
前記接続部は、その位置における前記外板と前記内板との間隔を調節可能に形成されているダブルスキンパネルであって、
摩擦攪拌接合用回転ツールから伝達される押圧力によって前記接続部が撓み変形することで、前記外板と前記内板との間隔が調節されることを特徴とするダブルスキンパネル。A metal outer plate and an inner plate that are substantially parallel to each other, and a connecting portion having a cross-sectional arc shape or a cross-sectional shape that connects them,
The connecting portion is a double skin panel formed so that the interval between the outer plate and the inner plate at the position can be adjusted,
The double skin panel characterized in that the distance between the outer plate and the inner plate is adjusted by bending and deforming the connecting portion by the pressing force transmitted from the rotary tool for friction stir welding.

前記接続部が、前記外板の端部と前記内板の端部とを接続することを特徴とする請求項１に記載のダブルスキンパネル。 The double skin panel according to claim 1, wherein the connection portion connects an end portion of the outer plate and an end portion of the inner plate.

前記外板の端部及び前記内板の端部に沿って厚さ方向に突出する凸条が形成されていることを特徴とする請求項１または請求項２に記載のダブルスキンパネル。 3. The double skin panel according to claim 1, wherein a protrusion that protrudes in a thickness direction is formed along an end of the outer plate and an end of the inner plate. 4.

前記外板の端部及び前記内板の端部に係合部が形成されていることを特徴とする請求項１乃至請求項３のいずれか一項に記載のダブルスキンパネル。 The double skin panel according to any one of claims 1 to 3, wherein an engaging portion is formed at an end portion of the outer plate and an end portion of the inner plate.

全体がアルミニウム合金製の押出形材からなることを特徴とする請求項１乃至請求項４のいずれか一項に記載のダブルスキンパネル。 The double skin panel according to any one of claims 1 to 4, wherein the double skin panel is entirely made of an extruded shape made of an aluminum alloy.

請求項１乃至請求項５のいずれか一項に記載のダブルスキンパネルの一対を、前記外板の端部同士及び前記内板の端部同士で突き合わせて配置し、
突合せ部に外側から回転ツールを押し込んで、接合中の前記外板の外側面同士及び前記内板の外側面同士が平坦になるように前記接続部を撓み変形させながら、その押圧力を前記接続部で支持し、前記外板同士又は前記内板同士を摩擦攪拌接合する、
ことを特徴とするダブルスキンパネルの摩擦攪拌接合方法。A pair of the double skin panels according to any one of claims 1 to 5 are arranged to face each other at the end portions of the outer plate and between the end portions of the inner plate,
Push the rotary tool into the abutting part from the outside, and bend and deform the connecting part so that the outer side surfaces of the outer plates and the outer side surfaces of the inner plate that are being joined become flat, and the pressing force is applied to the connecting part. Supported by the part, friction stir welding the outer plates or the inner plates,
A friction stir welding method for a double skin panel.