JP3990770B2 - Friction stir welding tool and T-joint forming method using the tool - Google Patents
Friction stir welding tool and T-joint forming method using the tool Download PDFInfo
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- JP3990770B2 JP3990770B2 JP19608897A JP19608897A JP3990770B2 JP 3990770 B2 JP3990770 B2 JP 3990770B2 JP 19608897 A JP19608897 A JP 19608897A JP 19608897 A JP19608897 A JP 19608897A JP 3990770 B2 JP3990770 B2 JP 3990770B2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
- B23K20/1255—Tools therefor, e.g. characterised by the shape of the probe
Description
【０００１】
【発明の属する技術分野】
本発明は、摩擦撹拌接合用ツール、及び、同ツールを用いた継手、例えばアルミニウム等の金属製構造材等のワークのＴ継手の形成方法に関する。
【０００２】
【従来の技術】
アルミニウム等の金属製構造材の接合方法として、摩擦撹拌接合法と称される接合法がある。
【０００３】
この摩擦撹拌接合法は、構造材同士を固相接合させるもので、図４に示されるような回転子（１）をツールとして用いる。この回転子（１）は、円柱状回転子本体（２）の先端軸芯部に、この円柱状回転子本体（２）よりも径小なピン状の摩擦撹拌用プローブ（３）を同軸一体に突設させたもので、硬質で耐熱性に優れた、鋼などの材料にて製作されている。
【０００４】
接合は、図５に示されるように、この回転子（１）を自軸回りで回転させながら、そのプローブ（３）の先端を、ワーク（５１）（５２）の突き合わせ境界部（５３）に押付け状態に当接させ、その摩擦熱で当接部分を軟化可塑化させる。そして、回転子（１）を更にワーク（５１）（５２）に押し付けて、プローブ （３）をワーク（５１）（５２）の肉厚方向に挿入させていき、円柱状回転子本体（２）の先端のショルダー部（４）をワーク（５１）（５２）に押付け状態に当接させる。しかる後、その状態を維持しながら、回転子（１）をワーク（５１）（５２）の突き合わせ境界部（５３）に沿って移動させていく。回転子（１）の通過する突き合わせ境界部では、周辺の材料が、回転子（１）の回転による摩擦熱で軟化撹拌され、かつ、円柱状回転子本体（２）のショルダー（４）にて飛散を規制されながらプローブ（３）の通過溝を埋めるように塑性流動したのち、熱を急速に失って冷却固化される。こうして、突き合わせ部（５３）における材料の軟化、密着変形、撹拌、冷却固化が回転子（１）の移動に伴って順次繰り返されていき、突き合わせ部（５３）においてワーク（５１）（５２）同士が互いに一体化され、順次接合（５８）されていく。
【０００５】
この摩擦撹拌接合法は、材料を溶融させることなく軟化状態でワーク（５１）（５２）同士を直接接合させるものであり、溶接の場合のような熱影響等による品質面での問題が発生せず、高品質で強固な接合部（５８）を形成できる。
【０００６】
【発明が解決しようとする課題】
しかし、上記のような摩擦撹拌接合法では、溶接によれば隅肉溶接となるようなＴ継手形式の場合、直角な壁に囲まれたコーナー部に対して斜め方向から回転子を作用させるのは実際上非常に難しく、そのため、摩擦撹拌接合法による隅肉接合は困難とされていた。これまで、摩擦撹拌接合法は、両ワーク（５１）（５２）の側縁部同士をこれらワーク（５１）（５２）にわたって平坦となるように突き合わせて接合する場合にしか用いられないものとされていたのである。
【０００７】
ところで、例えば上記のようなＴ継手の場合、図３（イ）に示されるように、第１ワーク（５５）の一方の面に第２ワーク（５６）をＴ字状に組み合わせ、第１ワーク（５５）の背面側からプローブ（３）を第２ワーク（５６）の肉に及ぶように作用せしめて接合を行うことが考えられる。
【０００８】
しかし、この方法では、プローブ（３）を第１ワーク（５５）の肉厚深さを越えて第２ワーク（５６）の肉に及ぶように深く挿入しなければならず、プローブ（３）の長さをある程度長いものにしなければならず、そうすると、直径も大きくして強度を確保しておく必要がある。
【０００９】
このようにして、図３（ロ）に示すように、プローブ（３）の直径が第２ワーク（５６）の肉厚を越えて大きいものとなったような場合、このプローブ（３）を第２ワーク（５６）の肉内まで挿入すると、図３（ハ）に示されるように、第１ワーク（５５）と第２ワーク（５６）との間の両コーナー部（Ｃ）（Ｃ）において第２ワーク（５６）の塑性流動部が遠心力で側方に飛び出し、接合不良を招いてしまう不都合を生じる。特に、第２ワーク（５６）の肉厚が薄いような場合には、この問題は摩擦撹拌接合によるＴ継手の実現を妨げる大きな要因となる。
【００１０】
本発明は、例えば、第１ワークの一方の面に第２ワークを組み合わせ、第１ワークのもう一方の面がわから摩擦撹拌用のプローブを第１ワークの肉を介して第２ワークの肉に及ぶように作用せしめるという新たな接合方法の採用において、プローブに充分な強度をもたせながら両ワークのコーナー部の接合不良の発生を防止し、品質良好なしっかりとした接合品を製作することができるようにして、摩擦撹拌接合法の適用範囲の拡大を図っていくことを課題の一つとする。
【００１１】
【課題を解決するための手段】
上記課題は、回転子本体の先端軸芯部に、該回転子本体よりも径小な摩擦撹拌用プローブが一体に設けられた摩擦撹拌接合用ツールであって、
前記撹拌用プローブが、その先端から基端がわに向けて径を大きくしていく円錐状部を有することを特徴とする摩擦撹拌接合用の回転ツールによって解決される。
【００１２】
即ち、例えば、第１ワークの一方の面に第２ワークを組み合わせ、第１ワークのもう一方の面がわからこのツールを第１ワークの肉を介して第２ワークの肉に挿入して摩擦撹拌接合を実施していく場合、プローブはその先端部に円錐状部を有するから、プローブを、両ワークのコーナー部から外方に突出させることなく、第２ワークの肉内に深く挿入していくことができ、コーナー部に接合不良を生じさせることなく両ワークをしっかりと品質良く接合することができる。
【００１３】
しかも、円錐効果により、プローブの先端部を深く第２ワークの肉内に深く挿入し得ながら、両ワークの当接境界部に面積広くプローブを作用することができて、両ワークを強固に接合することができる。
【００１４】
また、プローブの先端部は円錐状部の先端であり、その先端部をワークに対するセンター出しの目印として用いることによって、センター出しを容易にかつ能率良く行っていくことができる。
【００１５】
上記プローブは、この円錐状部と、円錐状部の基端側に連設された、円錐状部よりも径大な円柱状部とを備えることにより、その強度を増すことができ、接合中のプローブの破壊を有効的に防止することができる。
【００１６】
上記ツールは、上記のように、第１ワークの一方の面に第２ワークを組み合わせ、第１ワークのもう一方の面がわからツールを第２ワークの肉に及ぶように作用せしめ、第１ワークと第２ワークとを摩擦撹拌接合する場合に好適に用いることができ、それによって品質良好な接合品を製作することができる。
【００１７】
特に、両腕となる第１ワークの一方の面に脚となる第２ワークを組み合わせ、第１ワークのもう一方の面がわから上記のツールを第２ワークの肉に及ぶように作用せしめ、第１ワークと第２ワークとを摩擦撹拌接合することにより、これまで困難とされていたＴ継手を品質良好に形成することができる。
【００１８】
【発明の実施の形態】
次に、本発明の実施形態を図面に基づいて説明する。
【００１９】
図１に示される実施形態は、摩擦撹拌接合によりＴ継手を形成する場合のものである。即ち、（６）は第１ワーク、（７）は第２ワークであり、両ワーク（６）（７）は、アルミニウム製の平板材からなり、両腕となる第１ワーク（６）の一方の面に脚となる第２ワーク（７）を組み合わせてＴ字状となし、第１ワーク（６）の背面がわからツールのプローブ（３）を第２ワーク（７）の肉に及ぶように作用せしめ、両ワーク（６）（７）を摩擦撹拌接合してＴ継手を形成する。
【００２０】
プローブ（３）は、その先端から基端がわに向けて径を大きくしていく円錐状部（８）を有すると共に、該円錐状部（８）の基端側に径大な円柱状部（９）が一体に連設されて構成されたものである。
【００２１】
円錐状部（８）は、錐面の傾斜角度ａが３０〜４５°の範囲において設定されているのが好ましい。３０°を下回って小さいと、第２ワーク（７）の肉内へのプローブ（３）の挿入深さが不足し、４５°を下回って大きいと両ワーク（６）（７）のコーナー部（Ｃ）（Ｃ）において第２ワーク（７）の塑性流動部が側方に飛び出してしまいやすくなることによる。円錐状部（８）の直径Ｃは、第２ワーク（７）の肉厚ｔ2 よりも幾らか大きいか、若干小さいか、ほぼ同等に設定される。接合中、円錐状部（８）の円錐傾斜面をできるだけ両ワーク（６）（７）のコーナー部（Ｃ）に接近させ、両ワーク（６）（７）の接合面積を大きくするためである。
【００２２】
円柱状部（９）の直径Ａは、プローブ（３）の強度確保等の理由から、円錐状部（８）の直径Ｃよりも大きく設計されるが、その場合、第２ワーク（７）の板厚ｔ2 の１〜２倍程度に設定しておくのが好ましい。第２ワーク（７）の肉厚ｔ2 が小さい場合には板厚ｔ2 の２倍程度、肉厚ｔ2 が大きい場合には板厚ｔ2 の１倍程度に設定する。また、円柱状部（９）の長さＢは、第１ワーク（６）の板厚ｔ１よりも１ｍｍ程度短くしておくのがよい。接合中、円柱状部（９）が第１ワーク（６）の肉内に納まるようにするためであり、また、できる限り円柱状部の長さＢを大きくしてプローブ（３）の強度を高くするためである。
【００２３】
また、このプローブ（３）の外周面には、円錐状部（８）と円柱状部（９）との両方において、ネジ（３ａ）が形成されている。回転子（１）はネジ（３ａ）の螺旋方向とは逆の方向に回転駆動されるものとなされて、ワークの肉へのプローブ（３）の回転挿入中、プローブ（３）をワークへの挿入方向とは逆の方向に付勢し、その付勢力の反力にて肉を特にＴ継手用に効果的に撹拌するものとなされている。なお、プローブ（３）の外周面には、ネジ（３ａ）に替え、各種の溝や凹凸が形成されたものであってもよい。また、ショルダー（４）は、その外周縁からプローブ（３）側に向けてくぼんでいくように傾斜されている。
【００２４】
第１ワーク（６）と第２ワーク（７）との接合は、次のようにして行う。まず、第１ワーク（６）と第２ワーク（７）とを上記のようにＴ字状に組み合わせる。次いで、第１ワーク（６）の背後から、回転子（１）を回転させながら、プローブ（３）を第１ワーク（６）の肉を介して第２ワーク（７）の肉に及ぶように挿入していく。
【００２５】
プローブ（３）は、図１（ロ）に示されるように、その円錐状部（８）の傾斜面と、両ワーク（６）（７）のコーナー部（Ｃ）との間隔距離Ｓが０．１〜０．２ｍｍとなるところまで深く挿入する。間隔距離Ｓが０．１ｍｍを下回ると、コーナー部（Ｃ）から第２ワーク（７）の塑性流動部が飛び出してクラック等の接合不良を生じさせる原因となり、また、０．２ｍｍを上回ると、両ワーク（６）（７）の接合面積が狭くなってしまうことによる。このような挿入により、コーナー部（Ｃ）（Ｃ）に接合不良を生じさせることなく、両ワーク（６）（７）の接合面積を極限まで大きくできる。
【００２６】
プローブ（３）のこの挿入状態を維持しながら、回転子（１）を溝（６ａ）の長手方向に移動させていく。これにより、第１ワーク（６）と第２ワーク（７）との品質良好なＴ継手が形成される。
【００２７】
図２に示される第２実施形態は、両ワーク（６）（７）をＴ字状ではなく、端部同士を重ね合わせて、その重ね合わせ部に摩擦撹拌接合を行っていく場合のものである。コーナー部（Ｃ）に接合不良を生じさせることなく、両ワーク（６）（７）をしっかりと接合し得るなど、上記第１実施形態の場合の同様の効果が奏される。摩擦撹拌接合による重ね継手の形成を実現することができる。
【００２８】
以上に、本発明の実施形態を示したが、本発明は、その技術思想を逸脱しない範囲で各種の変更をなし得る。例えば、上記実施形態では、ワークとしてアルミニウム材を用いたが、その他の金属であってもよい。また、上記実施形態では、平板材同士の接合について説明したが、平板材と骨材とでＴ字状、重ね状に接合する場合など、広く各種の構造を形成する場合に適用されてよい。また、本発明は、Ｔ継手、重ね継手の形成に限られるものではなく、要は、第１ワークの一方の面に第２ワークを組み合わせ、第１ワークのもう一方の面がわから摩擦撹拌用のプローブを第１ワークの肉を介して第２ワークの肉に及ぶように作用せしめる形式の接合に広く適用され得るものである。また、本発明のツールは、センター出しのメリットを有するものであり、従って、各種組み合わせ形式の継手の形成に広く有効的に用いられ得るものであることはいうまでもない。
【００２９】
【発明の効果】
上述の次第で、本発明の摩擦撹拌接合用ツールは、撹拌用プローブが、その先端から基端がわに向けて径を大きくしていく円錐状部を有するものであるから、例えば、第１ワークの一方の面に第２ワークを組み合わせ、第１ワークのもう一方の面がわから摩擦撹拌用のプローブを第１ワークの肉を介して第２ワークの肉に及ぶように作用せしめるという新たな接合方法の採用において、プローブを、両ワークのコーナー部から外方に突出させることなく、第２ワークの肉内に深く挿入していくことができ、プローブに充分な強度をもたせながら両ワークのコーナー部の接合不良の発生を防止して、品質良好なしっかりとした接合品を製作することができ、摩擦撹拌接合法の適用範囲を拡大することができる。
【００３０】
また、プローブは、円錐状部の基端側に径大な円柱状部を連設させた構成とすることにより、その強度を増して、接合中のプローブ破壊を有効的に防止することができる。
【００３１】
また、上記ツールを、上記のように、第１ワークの一方の面に第２ワークを組み合わせ、第１ワークのもう一方の面がわからツールを第２ワークの肉に及ぶように作用せしめて、第１ワークと第２ワークとを摩擦撹拌接合する場合に用いることにより、品質良好な接合品を製作することができる。特に、両腕となる第１ワークの一方の面に脚となる第２ワークを組み合わせ、第１ワークのもう一方の面がわから上記のツールを第２ワークの肉に及ぶように作用せしめ、第１ワークと第２ワークとを摩擦撹拌接合することにより、これまで困難とされていたＴ継手を品質良好に形成することができる。
【図面の簡単な説明】
【図１】第１実施形態を示すもので、図（イ）は両ワークの組み合わせ状態を示す横断面図、図（ロ）はプローブの挿入状態を示す横断面図である。
【図２】第１実施形態を示すもので、図（イ）は両ワークの組み合わせ状態を示す横断面図、図（ロ）はプローブの挿入状態を示す横断面図である。
【図３】摩擦撹拌接合法によるＴ継手の新しい形成法を示すもので、図（イ）ないし図（ハ）は接合前後のワークの断面図である。
【図４】摩擦撹拌接合に用いる回転子の一例を示すもので、図（イ）は側面図、図（ロ）は先端面図である。
【図５】従来の摩擦撹拌接合法を示すもので、図（イ）は接合中のワークの横断面図、図（ロ）は平面図である。
【符号の説明】
２…回転子本体
３…プローブ
６…第１ワーク
７…第２ワーク
８…円錐状部
９…円柱状部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a friction stir welding tool and a method of forming a T-joint of a work such as a metal structural material such as aluminum, for example, a joint using the tool.
[0002]
[Prior art]
As a method for joining metal structural members such as aluminum, there is a joining method called a friction stir welding method.
[0003]
In this friction stir welding method, structural members are solid-phase bonded to each other, and a rotor (1) as shown in FIG. 4 is used as a tool. This rotor (1) is coaxially integrated with a pin-shaped friction stir probe (3) having a diameter smaller than that of the cylindrical rotor body (2) at the tip axial center portion of the cylindrical rotor body (2). It is made of steel and other materials that are hard and have excellent heat resistance.
[0004]
As shown in FIG. 5, the rotor (1) is rotated about its own axis, and the tip of the probe (3) is brought into contact with the butt boundary (53) of the workpieces (51) and (52) as shown in FIG. The contact portion is brought into contact with the pressed state, and the contact portion is softened and plasticized by the frictional heat. Then, the rotor (1) is further pressed against the workpieces (51) and (52), and the probe (3) is inserted in the thickness direction of the workpieces (51) and (52), so that the cylindrical rotor body (2) is inserted. The shoulder portion (4) at the tip of the blade is brought into contact with the workpieces (51) and (52) in a pressed state. Thereafter, the rotor (1) is moved along the abutting boundary (53) of the workpieces (51) (52) while maintaining the state. At the butt boundary where the rotor (1) passes, the surrounding materials are softened and agitated by frictional heat generated by the rotation of the rotor (1), and the shoulder (4) of the cylindrical rotor body (2) After the plastic flow so as to fill the passage groove of the probe (3) while the scattering is restricted, the heat is rapidly lost to solidify by cooling. In this way, the softening, adhesion deformation, stirring, and cooling and solidification of the material in the butting portion (53) are sequentially repeated as the rotor (1) moves, and the workpieces (51) and (52) in the butting portion (53) Are integrated with each other and sequentially joined (58).
[0005]
This friction stir welding method directly joins the workpieces (51) and (52) in a softened state without melting the material, and causes problems in terms of quality due to thermal effects and the like as in welding. Therefore, a high quality and strong joint (58) can be formed.
[0006]
[Problems to be solved by the invention]
However, in the friction stir welding method as described above, in the case of a T joint type in which fillet welding is performed according to welding, the rotor is applied to the corner portion surrounded by a right-angle wall from an oblique direction. Is very difficult in practice, so fillet joining by friction stir welding has been considered difficult. Up to now, the friction stir welding method can be used only when the side edges of both workpieces (51) and (52) are butted so as to be flat across the workpieces (51) and (52). It was.
[0007]
By the way, in the case of the T joint as described above, for example, as shown in FIG. 3 (a), the first workpiece (55) is combined with the second workpiece (56) in a T-shape to form the first workpiece. It can be considered that the probe (3) is joined from the back side of (55) so as to reach the flesh of the second workpiece (56).
[0008]
However, in this method, the probe (3) must be inserted deeply so as to extend beyond the thickness of the first workpiece (55) and reach the thickness of the second workpiece (56). The length must be long to some extent, and then the diameter must be increased to ensure strength.
[0009]
Thus, as shown in FIG. 3 (b), when the diameter of the probe (3) is larger than the thickness of the second workpiece (56), the probe (3) is When inserted into the meat of the two workpieces (56), as shown in FIG. 3 (c), at both corners (C) and (C) between the first workpiece (55) and the second workpiece (56). The plastic flow part of the second workpiece (56) jumps out to the side by centrifugal force, resulting in inconvenience of causing poor bonding. In particular, when the thickness of the second workpiece (56) is thin, this problem is a major factor that hinders the realization of the T joint by friction stir welding.
[0010]
In the present invention, for example, a second workpiece is combined with one surface of the first workpiece, and the other surface of the first workpiece is identified, and a probe for friction stirring is applied to the meat of the second workpiece via the meat of the first workpiece. Adopting a new joining method that allows the probe to work as much as possible, while preventing the occurrence of joint failure at the corners of both workpieces while giving the probe sufficient strength, it is possible to produce a firm joint with good quality Thus, it is an object to expand the application range of the friction stir welding method.
[0011]
[Means for Solving the Problems]
The above-mentioned problem is a friction stir welding tool in which a friction stir probe having a diameter smaller than that of the rotor main body is integrally provided on the tip axis portion of the rotor main body,
The stirring probe has a conical portion whose diameter increases from the tip toward the base, and is solved by a rotating tool for friction stir welding.
[0012]
That is, for example, the second workpiece is combined with one surface of the first workpiece, the other surface of the first workpiece is known, and this tool is inserted into the meat of the second workpiece through the meat of the first workpiece. When joining, since the probe has a conical portion at the tip, the probe is inserted deeply into the meat of the second workpiece without protruding outward from the corners of both workpieces. Therefore, both workpieces can be firmly joined with high quality without causing poor joints at the corners.
[0013]
In addition, the tip of the probe can be inserted deeply into the flesh of the second workpiece due to the conical effect, and the probe can act on the abutting boundary between the two workpieces, and the two workpieces can be joined firmly. can do.
[0014]
Further, the tip of the probe is a tip of a conical portion, and by using the tip as a mark for centering the workpiece, centering can be performed easily and efficiently.
[0015]
The probe includes the conical portion and a columnar portion having a diameter larger than that of the conical portion, which is connected to the base end side of the conical portion, so that the strength of the probe can be increased. It is possible to effectively prevent the destruction of the probe.
[0016]
As described above, the tool combines the second workpiece with one side of the first workpiece, and the other side of the first workpiece makes the tool so as to reach the flesh of the second workpiece. And the second workpiece can be suitably used when friction stir welding is performed, whereby a bonded product with good quality can be manufactured.
[0017]
In particular, the second work as a leg is combined with one face of the first work as both arms, and the other face of the first work is made to work so that the above tool extends over the meat of the second work. By performing friction stir welding between the first workpiece and the second workpiece, the T joint that has been considered difficult can be formed with good quality.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0019]
The embodiment shown in FIG. 1 is a case where a T joint is formed by friction stir welding. That is, (6) is the first work and (7) is the second work. Both works (6) and (7) are made of an aluminum flat plate and one of the first works (6) serving as both arms. The second work (7), which is a leg, is combined with the leg to form a T-shape so that the back of the first work (6) is clearly visible and the probe (3) of the tool extends over the meat of the second work (7). The two workpieces (6) and (7) are friction stir welded to form a T joint.
[0020]
The probe (3) has a conical portion (8) whose diameter increases from the distal end toward the flank, and a cylindrical portion having a large diameter on the proximal end side of the conical portion (8). (9) is configured to be integrally connected.
[0021]
The conical portion (8) is preferably set in a range where the inclination angle a of the conical surface is 30 to 45 °. If the angle is smaller than 30 °, the insertion depth of the probe (3) into the meat of the second workpiece (7) is insufficient. If the angle is smaller than 45 °, the corners of both workpieces (6) (7) ( C) In (C), the plastic flow part of the second workpiece (7) is likely to jump out to the side. The diameter C of the conical portion (8) is set to be somewhat larger, slightly smaller or substantially equal to the wall thickness t2 of the second workpiece (7). This is because during the joining, the conical inclined surface of the conical portion (8) is brought as close as possible to the corner portions (C) of the workpieces (6) and (7) to increase the joining area of the workpieces (6) and (7). .
[0022]
The diameter A of the cylindrical part (9) is designed to be larger than the diameter C of the conical part (8) for reasons such as securing the strength of the probe (3). In that case, the diameter of the second work (7) It is preferable to set it to about 1 to 2 times the plate thickness t2. When the thickness t2 of the second workpiece (7) is small, it is set to about twice the plate thickness t2, and when the thickness t2 is large, it is set to about one time the plate thickness t2. The length B of the cylindrical portion (9) is preferably about 1 mm shorter than the plate thickness t1 of the first workpiece (6). This is for the purpose of fitting the cylindrical part (9) within the meat of the first workpiece (6) during joining, and increasing the length of the cylindrical part as much as possible to increase the strength of the probe (3). This is to make it higher.
[0023]
Moreover, the screw (3a) is formed in the outer peripheral surface of this probe (3) in both the conical part (8) and the cylindrical part (9). The rotor (1) is driven to rotate in a direction opposite to the spiral direction of the screw (3a), and the probe (3) is inserted into the workpiece during rotation insertion of the probe (3) into the meat of the workpiece. It is urged in the direction opposite to the insertion direction, and the reaction force of the urging force stirs the meat particularly effectively for the T joint. Note that various grooves and irregularities may be formed on the outer peripheral surface of the probe (3) instead of the screw (3a). The shoulder (4) is inclined so as to be recessed from the outer peripheral edge toward the probe (3).
[0024]
The first workpiece (6) and the second workpiece (7) are joined as follows. First, the first workpiece (6) and the second workpiece (7) are combined in a T shape as described above. Next, while rotating the rotor (1) from behind the first work (6), the probe (3) extends over the meat of the second work (7) through the meat of the first work (6). Insert it.
[0025]
As shown in FIG. 1 (b), the probe (3) has a distance S between the inclined surface of the conical portion (8) and the corners (C) of the workpieces (6) and (7) is 0. Insert it deeply to the point of 1-0.2mm. When the spacing distance S is less than 0.1 mm, the plastic flow part of the second workpiece (7) jumps out from the corner part (C) and causes a bonding failure such as a crack, and when it exceeds 0.2 mm, This is because the joint area of both the works (6) and (7) becomes narrow. By such insertion, the joining area of both the works (6) and (7) can be increased to the limit without causing joining failure in the corner portions (C) and (C).
[0026]
The rotor (1) is moved in the longitudinal direction of the groove (6a) while maintaining the insertion state of the probe (3). Thereby, a good quality T joint between the first workpiece (6) and the second workpiece (7) is formed.
[0027]
The second embodiment shown in FIG. 2 is a case where both works (6) and (7) are not T-shaped, but the end portions are overlapped and friction stir welding is performed on the overlapped portion. is there. The same effect as in the case of the first embodiment can be obtained, for example, both the works (6) and (7) can be firmly joined without causing poor joining at the corner (C). Formation of a lap joint by friction stir welding can be realized.
[0028]
As mentioned above, although embodiment of this invention was shown, this invention can make various changes in the range which does not deviate from the technical thought. For example, in the said embodiment, although the aluminum material was used as a workpiece | work, another metal may be sufficient. Moreover, although the said embodiment demonstrated the joining of flat plate materials, you may apply when forming various structures widely, such as the case where a flat plate material and an aggregate join in T shape and a pile shape. Further, the present invention is not limited to the formation of T joints and lap joints. In short, the second work is combined with one face of the first work, and the other face of the first work is used for friction stirring. The probe can be widely applied to the type of joining in which the probe is made to extend through the meat of the first workpiece to the meat of the second workpiece. Moreover, it goes without saying that the tool of the present invention has the advantage of being centered, and can therefore be used widely and effectively for forming various types of joints.
[0029]
【The invention's effect】
Depending on the above, the friction stir welding tool of the present invention is such that the stirring probe has a conical portion whose diameter increases from the distal end toward the base toward the base. The second work is combined with one side of the work, and the other face of the first work is made clear so that the friction stir probe is caused to act on the meat of the second work through the meat of the first work. In adopting the joining method, the probe can be inserted deeply into the flesh of the second workpiece without protruding outward from the corners of both workpieces. It is possible to prevent the occurrence of poor bonding at the corner portion, to manufacture a firm bonded product with good quality, and to expand the application range of the friction stir welding method.
[0030]
In addition, the probe has a configuration in which a cylindrical portion having a large diameter is continuously provided on the proximal end side of the conical portion, thereby increasing its strength and effectively preventing probe breakage during bonding. .
[0031]
In addition, as described above, the tool is combined with the second workpiece on one side of the first workpiece, and the other side of the first workpiece is made to work so that the tool reaches the meat of the second workpiece, By using the first workpiece and the second workpiece when friction stir welding is performed, a bonded product with good quality can be manufactured. In particular, the second work as a leg is combined with one face of the first work as both arms, and the other face of the first work is made to work so that the above tool extends over the meat of the second work. By performing friction stir welding between the first workpiece and the second workpiece, the T joint that has been considered difficult can be formed with good quality.
[Brief description of the drawings]
1A and 1B show a first embodiment, in which FIG. 1A is a transverse sectional view showing a combined state of both workpieces, and FIG. 1B is a transverse sectional view showing an inserted state of a probe.
FIGS. 2A and 2B show a first embodiment, in which FIG. 1A is a transverse sectional view showing a combined state of both workpieces, and FIG. 2B is a transverse sectional view showing an inserted state of a probe.
FIG. 3 shows a new method of forming a T-joint by friction stir welding, and FIGS. (A) to (c) are cross-sectional views of the workpieces before and after joining.
4A and 4B show an example of a rotor used for friction stir welding, in which FIG. 1A is a side view and FIG. 2B is a front end view.
5A and 5B show a conventional friction stir welding method. FIG. 5A is a cross-sectional view of workpieces being joined, and FIG. 5B is a plan view.
[Explanation of symbols]
2 ...
Claims (4)
前記撹拌用プローブは、その先端から基端がわに向けて径を大きくしていく円錐状部と、該円錐状部の基端側に連設された、円錐状部よりも径大な円柱状部とを備えていることを特徴とする摩擦撹拌接合用の回転ツール。A friction stir welding tool in which a friction stir probe having a diameter smaller than that of the rotor main body is integrally provided on the tip axis portion of the rotor main body,
The stirring probe has a conical portion whose diameter increases from the distal end toward the flank, and a circle having a diameter larger than that of the conical portion connected to the proximal end side of the conical portion. A rotary tool for friction stir welding, comprising a columnar part.
前記ツールにおけるプローブの円柱状部の直径は、前記第２ワークの板厚の１〜２倍に設定されていることを特徴とする摩擦撹拌接合によるＴ継手の形成方法。The diameter of the cylindrical part of the probe in the tool is set to 1 to 2 times the plate thickness of the second workpiece, and the method of forming a T joint by friction stir welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19608897A JP3990770B2 (en) | 1997-07-22 | 1997-07-22 | Friction stir welding tool and T-joint forming method using the tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19608897A JP3990770B2 (en) | 1997-07-22 | 1997-07-22 | Friction stir welding tool and T-joint forming method using the tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1133750A JPH1133750A (en) | 1999-02-09 |
| JP3990770B2 true JP3990770B2 (en) | 2007-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19608897A Expired - Fee Related JP3990770B2 (en) | 1997-07-22 | 1997-07-22 | Friction stir welding tool and T-joint forming method using the tool |
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| Country | Link |
|---|---|
| JP (1) | JP3990770B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH041056A (en) * | 1990-04-19 | 1992-01-06 | Canon Inc | Ink-jet recording device |
| US6352193B1 (en) | 2000-08-01 | 2002-03-05 | General Electric Company | Apparatus for joining electrically conductive materials |
| JP4646421B2 (en) * | 2001-03-05 | 2011-03-09 | 公 西原 | Friction stir molding method |
| JP5490076B2 (en) * | 2011-10-28 | 2014-05-14 | 株式会社レイズエンジニアリング | Friction stir welding method, friction stir weld, and friction stir welding tool |
| JP6129796B2 (en) * | 2014-08-29 | 2017-05-17 | 株式会社Uacj | Joining apparatus and joining method using the same |
| JP6766477B2 (en) * | 2016-07-01 | 2020-10-14 | 日本軽金属株式会社 | Joining method |
| CN108202181A (en) * | 2017-12-28 | 2018-06-26 | 重庆派馨特机电有限公司 | A kind of adjustable agitating friction weldering handle of a knife of clamping internal diameter |
| CN111761199A (en) * | 2020-06-09 | 2020-10-13 | 中国船舶重工集团公司第七二五研究所 | Friction stir welding method for titanium alloy T-shaped joint |
| CN112975109A (en) * | 2021-03-15 | 2021-06-18 | 杭州祥博传热科技股份有限公司 | Welding process applying friction stir welding radiator and radiator |
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1997
- 1997-07-22 JP JP19608897A patent/JP3990770B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1133750A (en) | 1999-02-09 |
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