JP2003094174A - Method for friction stir welding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method capable of advantageously and easily obtaining a good end face of a welding part by adding devices to the starting form and the ending form of the operation of friction stir welding in providing a welding material by the friction stir welding. SOLUTION: A tab sheet which is harder than sheet-like members 2a and 2b or has the same hardness as them is made to abut on the end face on the welding starting side of an abutting part 8 of the sheet-like members 2a and 2b. The insertion position of a pin 4 of a rotary tool 6 at starting of the friction stir welding is set so that the distance between the end faces of the sheet-like members 2a and 2b on the welding starting side and the tip part of the pin 4 is 3 mm or less. The end face on the welding ending side is harder than the sheet-like members 2a and 2b or has the same hardness as them. The tab sheet 30 in which a semiannular or U-shaped recess 32 whose depth is the radius of the pin 4 or more and the radius of the rotary tool 6 or less is provided is made to abut on the opposed position to the abutting part 8 of the sheet-like members 2a and 2b. After the rotary tool 6 reaches the tab sheet from the abutting part 8 through the recess, the friction stir welding is finished.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【技術分野】本発明は、摩擦攪拌接合方法に係り、特
に、摩擦攪拌接合によって形成される接合部における接
合端部の端面健全化方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction stir welding method, and more particularly to a method for improving the end face of a joint end formed by friction stir welding.

【０００２】[0002]

【背景技術】近年、摩擦熱を利用して板を突合せ接合す
る方法の一つとして、米国特許第５４６０３１７号明細
書や特表平７−５０５０９０号公報等に明らかにされて
いる如き、摩擦攪拌接合法（Ｆｒｉｃｔｉｏｎ Ｓｔｉ
ｒ Ｗｅｌｄｉｎｇ）が、入熱が少なく、また接合部の
強度低下や歪みの少ない接合方法として、注目を受けて
いる。BACKGROUND ART In recent years, as one of the methods for butt-joining plates by using frictional heat, friction stirring as disclosed in US Pat. No. 5,460,317 and Japanese Patent Publication No. 7-505090. Joining method (Frictional Sti)
r Welding) has been receiving attention as a joining method with less heat input and with less strength reduction and distortion of the joint.

【０００３】そして、そのような摩擦攪拌接合方法は、
具体的には、図１に例示されている如く、接合されるべ
き２枚の板材２ａ，２ｂよりも硬い材質のピン４を先端
中心部に設けてなるロッド状の回転治具６を用い、この
回転治具６を高速回転せしめつつ、その先端のピン４
を、２枚の板材２ａ，２ｂの突合せ部８の部位に差し込
み、相対的に該突合せ部８に沿って移動せしめることに
より、それら回転せしめられるピン４や回転治具６と板
材２ａ，２ｂとの間に、摩擦熱を発生せしめ、そしてそ
の摩擦熱にて、突合せ部８の周辺部位を塑性加工可能な
状態と為し、更にピン４の高速回転による攪拌作用に
て、板材２ａ，２ｂの突合せ部位（８）の組織を入り交
わらせ、以て溶融せしめることなく、２枚の板材２ａ，
２ｂを接合せしめるものである。And, such a friction stir welding method is
Specifically, as illustrated in FIG. 1, a rod-shaped rotary jig 6 having a pin 4 made of a material harder than the two plate members 2a and 2b to be joined is provided at the center of the tip, While rotating this rotating jig 6 at high speed, the pin 4 at the tip thereof is rotated.
Is inserted into the portion of the abutting portion 8 of the two plate members 2a and 2b and is moved along the abutting portion 8 relative to each other so that the pin 4 and the rotating jig 6 and the plate members 2a and 2b can be rotated. During this period, frictional heat is generated, and due to the frictional heat, the peripheral portion of the butted portion 8 is made into a state in which it can be plastically worked. Two plate materials 2a, without intermingling the structures of the abutting parts (8) and melting them,
2b is to be joined.

【０００４】ところで、このような摩擦攪拌接合手法に
基づくところの接合開始時においては、回転治具６が、
その肩部（ショルダー部）が接合されるべき板材２ａ，
２ｂの端面より３mmを超える長さにおいて離れて入り込
んだ位置において、板材２ａ，２ｂの板面に接触するよ
うに、板材２ａ，２ｂの突合せ部８に差し込まれて、摩
擦攪拌接合操作が開始され、そして、突合せ部８に沿っ
て、図示の如く、矢印方向に移動せしめられることによ
って、かかる回転治具６の後方側に、接合部１０が形成
されるようになっている。そのような入り込んだ位置か
ら接合する理由は、回転治具６の回転により攪拌された
メタルが接合されるべき板材２ａ，２ｂの端面から洩れ
ることによる、接合部１０における接合欠陥の発生を防
止することにある。By the way, at the start of welding based on such a friction stir welding method, the rotary jig 6
The plate member 2a whose shoulder portion (shoulder portion) is to be joined,
The friction stir welding operation is started by being inserted into the abutting portion 8 of the plate materials 2a and 2b so as to come into contact with the plate surfaces of the plate materials 2a and 2b at a position that is separated from the end surface of 2b by a length of more than 3 mm. Then, as shown in the drawing, the joint 10 is formed on the rear side of the rotary jig 6 by being moved in the direction of the arrow along the abutting portion 8. The reason for joining from such an intruding position is to prevent the occurrence of joining defects in the joining portion 10 due to the metal agitated by the rotation of the rotating jig 6 leaking from the end faces of the plate materials 2a and 2b to be joined. Especially.

【０００５】このため、図１にも示されている如く、接
合されるべき二つの部材２ａ，２ｂの突合せ部８の接合
開始端側の部分が、或る程度の長さに亘って、未接合部
１２として、二つの板材２ａ，２ｂが接合されてなる接
合体内に存在することとなるのである。そして、そのよ
うな未接合部１２の処理のため、摩擦攪拌接合操作が終
了した後、接合体における未接合部１２部分の切断を行
ったり、或いは、溶融溶接による手直しが施されること
となるのであるが、それらの後処理は、非経済的のみな
らず、溶融溶接の熱影響による歪みの発生や、軟化とい
った問題を、新たに惹起せしめることとなる。Therefore, as shown in FIG. 1, the joining start end side portion of the abutting portion 8 of the two members 2a and 2b to be joined is not extended over a certain length. The joining portion 12 is present in a joined body formed by joining the two plate materials 2a and 2b. Due to such treatment of the unbonded portion 12, after the friction stir welding operation is completed, the unbonded portion 12 portion of the bonded body is cut or repaired by fusion welding. However, these post-treatments are not only uneconomical, but also cause new problems such as strain generation and softening due to the heat effect of fusion welding.

【０００６】一方、摩擦攪拌接合操作の接合終了時にお
いても、上記した接合開始時と同様に、板材２ａ，２ｂ
の突合せ部８の接合終了端側の端面から１０mm以上余し
た位置（端面とショルダー部との間の距離）において、
回転治具６を引き抜いて、終了せしめている。その理由
は、回転治具６の回転により攪拌されたメタルが接合体
の端面から漏れることによる、接合部における接合欠陥
の発生を阻止することにある。そして、それにより、二
つの板材２ａ，２ｂの突合せ部８に形成される接合部１
０が、二つの板材２ａ，２ｂの端面に至ることはなく、
接合部１０の最終尾部と板材端面との間の所定長さ部分
に位置する突合せ部８が、未接合部（１２）として残
り、そのため、接合操作の終了後において、そのような
未接合部（１２）の存在部分を切断したり、或いは、そ
のような未接合部（１２）を溶融溶接することからなる
手直しが施されているのであるが、それらの後処理は、
非経済的のみならず、溶融溶接の熱影響による歪みの発
生や軟化といった問題があり、更に、回転治具６を引き
抜いた後のピン穴が、凹みとして残存する不具合も内在
するものであった。On the other hand, even at the end of the friction stir welding operation, the plate members 2a and 2b are similarly to the above-mentioned start of welding.
At a position (distance between the end surface and the shoulder portion) 10 mm or more away from the end surface of the butt portion 8 on the joining end side,
The rotating jig 6 is pulled out to complete the process. The reason is to prevent the generation of a bonding defect at the bonded portion due to the metal agitated by the rotation of the rotating jig 6 leaking from the end surface of the bonded body. And thereby, the joining part 1 formed in the abutting part 8 of the two plate materials 2a and 2b.
0 does not reach the end faces of the two plate members 2a and 2b,
The abutting portion 8 located in the predetermined length portion between the final tail portion of the joining portion 10 and the plate end face remains as the unjoining portion (12), and therefore such an unjoining portion (12) is formed after the joining operation is completed. 12) is reworked by cutting the existing portion or melting-welding such an unjoined portion (12), but their post-treatment is
Not only is it uneconomical, but there are problems such as distortion and softening due to the heat effect of fusion welding, and there is also a problem that the pin hole after pulling out the rotary jig 6 remains as a recess. .

【０００７】尤も、そのような摩擦攪拌接合操作におけ
る接合開始時や接合終了時に惹起される上記不具合を解
消すべく、例えば、二つの板材２ａ，２ｂの突合せ部８
における接合開始端側の端面や、接合終了端側の端面に
対して、それぞれ適当なタブ板を当接せしめ、回転治具
６を一方のタブ板に差し込んで、接合操作を開始せし
め、そして、突合せ部８に入り込ませて、突合せ部８を
全長に亘って通過させた後、他方のタブ板まで至らしめ
た後、回転治具６を引き抜く手法の採用が考えられるも
のの、そのような手法にあっては、両端のタブ板が、二
つの板材２ａ，２ｂの両端面に対して接合せしめられる
こととなるところから、それらタブ板の切断除去に手間
がかかると共に、その切断除去に際して、接合部１０の
切断面が二つの板材２ａ，２ｂの突合せ部８内に入り込
んだ形態において、タブ板が除去される場合にあって
は、接合体における接合部１０の強度の問題が発生し、
また、端面の手直しの等の作業が新たに発生するという
問題も内在することとなる。However, in order to eliminate the above-mentioned problems caused at the time of starting and ending the welding in such friction stir welding operation, for example, the abutting portion 8 of the two plate members 2a, 2b is used.
A suitable tab plate is brought into contact with the end surface on the joining start end side or the end surface on the joining end end side in each, and the rotary jig 6 is inserted into one of the tab plates to start the joining operation, and Although it is conceivable to adopt a method in which the rotary jig 6 is pulled out after the butt portion 8 is inserted into the butt portion 8 and passed through the butt portion 8 over the entire length and then the other tab plate is reached. In that case, since the tab plates at both ends are joined to both end faces of the two plate members 2a and 2b, it takes a lot of time to cut and remove the tab plates, and at the time of cutting and removing the joint parts. When the tab plate is removed in a form in which the cut surface of 10 enters the abutting portion 8 of the two plate materials 2a and 2b, a problem of strength of the joint portion 10 in the joined body occurs,
In addition, there is an inherent problem that a work such as rework of the end face is newly generated.

【０００８】また、特開２０００−４２７５９号公報に
おいては、接合終了時の上記不具合を解消する方法とし
て、接合終了部分に、予め捨て肉部を設けて、その捨て
肉部に回転治具を逃がし、その後、かかる捨て肉部を切
断除去せしめることにより、回転治具引き抜き後の穴や
凹部を生じさせない摩擦攪拌接合方法が提案されてい
る。しかしながら、そのような方法では、接合されるべ
き部材に捨て肉部を特別に設ける必要があるところか
ら、そのような捨て肉部を加工するための手間が必要と
なることに加えて、材料コストや、その切断除去工程の
コストが必然的に掛かることとなり、十分に実用的なも
のではないのである。Further, in Japanese Unexamined Patent Publication No. 2000-42759, as a method for solving the above-mentioned problems at the end of joining, a waste meat portion is provided in advance at the joint end portion and the rotary jig is allowed to escape to the waste meat portion. After that, a friction stir welding method has been proposed in which holes and recesses are not formed after the rotary jig is pulled out by cutting and removing the discarded meat portion. However, in such a method, since it is necessary to specially provide a discarded meat portion in the members to be joined, in addition to the time and labor required for processing such a discarded meat portion, the material cost is also increased. In addition, the cost of the cutting and removing process is inevitably high, and it is not sufficiently practical.

【０００９】さらに、特開２０００−４２７６２号公報
においては、パイプ同士の摩擦攪拌接合において、接合
部に配置した当て部材に回転治具を逃がすことにより、
回転治具引き抜き後の穴や凹部を生じさせないようにし
た方法が、明らかにされている。この方法では、接合材
と当て部材の界面において、攪拌されたメタルの影響に
よって、接合材から当て部材を簡単には取り外すことが
出来ない問題があり、このため、力任せに当て部材を外
した場合にあっては、当て部材部分が残り、その後の修
正が面倒となったり、或いは接合体部分が剥ぎ取られ
て、欠陥となったりして、健全な接合品を得る上におい
て、好ましい方法といえるものではないのである。Further, in Japanese Patent Laid-Open No. 2000-42762, in friction stir welding of pipes, by letting a rotary jig escape to a contact member arranged at the joint,
A method has been clarified in which no hole or recess is formed after the rotary jig is pulled out. In this method, there is a problem that the pad member cannot be easily removed from the joint material at the interface between the joint material and the pad member due to the influence of the agitated metal. Therefore, when the pad member is removed by force. In that case, it can be said that it is a preferable method for obtaining a sound joined product because the patch member portion remains and the subsequent correction is troublesome, or the joined body portion is peeled off and becomes a defect. It is not a thing.

【００１０】[0010]

【解決課題】ここにおいて、本発明は、かかる事情を背
景にして為されたものであって、その解決課題とすると
ころは、摩擦攪拌接合の開始形態や終了形態に工夫を加
えることにより、健全な接合部端面を、有利に、且つ簡
単に実現し得る方法を提供することにある。The present invention has been made in view of such circumstances, and the problem to be solved is to improve the soundness of a friction stir welding by adding a device to a start mode and an end mode. Another object of the present invention is to provide a method capable of realizing a simple joint end surface in an advantageous and simple manner.

【００１１】[0011]

【解決手段】そして、本発明にあっては、かかる課題の
うち、摩擦攪拌接合操作での接合開始時における問題を
解消し、接合開始端側の健全な接合部端面を実現すべ
く、接合されるべき二つの板状部材を突き合わせ、その
突合せ部に対して、ロッド状の回転治具の先端に同心的
に設けたピンを、該回転治具と共に一体に回転させつつ
差し込み、相対的に移動させることにより、かかる突合
せ部を摩擦攪拌接合せしめるに際し、該二つの板状部材
における、前記突合せ部の接合開始端側の端面に対し
て、それら板状部材よりも硬質の若しくは同様な硬さの
タブ板を当接せしめる一方、かかる接合開始時における
回転治具のピンの差込位置が、前記接合開始端側の板状
部材端面と前記ピンの先端部における最先端位置との間
の距離が３mm以下となるようにして、かかる摩擦攪拌接
合操作を開始するようにしたことを特徴とする摩擦攪拌
接合方法を、その要旨とするものである。In the present invention, among the above problems, the problems at the time of starting the welding in the friction stir welding operation are solved, and the welding is performed in order to realize a sound welding end face on the welding start end side. The two plate-shaped members that should be joined are butted, and the pin concentrically provided at the tip of the rod-shaped rotary jig is inserted into the butted part while rotating together with the rotary jig, and moved relatively. By so doing, when performing such friction stir welding of the abutting portions, the two plate-shaped members, with respect to the end face of the abutting start end side of the abutting portion, of the harder or similar hardness than the plate-shaped members. While the tab plate is brought into contact, the insertion position of the pin of the rotary jig at the time of starting the joining is such that the distance between the end face of the plate-like member on the joining starting end side and the tip end position of the pin is 3mm or less And thus, the friction stir welding method characterized in that so as to initiate such a friction stir welding operation, is to its gist.

【００１２】また、本発明にあっては、摩擦攪拌接合操
作での終了時において、接合終了端側における健全な接
合部端面を実現すべく、接合されるべき二つの板状部材
を突き合わせ、その突合せ部に対して、ロッド状の回転
治具の先端に同心的に設けたピンを、該回転治具と共に
一体に回転させつつ差し込み、相対的に移動させること
により、かかる突合せ部を摩擦攪拌接合せしめるに際
し、該二つの板状部材における、前記突合せ部の接合終
端側の端面に対して、それら板状部材よりも硬質の若し
くは同様な硬さのタブ板を当接せしめると共に、該タブ
板の前記突合せ部に対向する部位に、前記ピンの半径以
上、前記回転治具の半径以下の凹陥深さを有する半円形
乃至はＵ字形の凹所を設け、前記回転治具が前記突合せ
部から該凹所を経て該タブ板に達した後、摩擦攪拌接合
操作が終了せしめられるようにしたことを特徴とする摩
擦攪拌接合方法を、その要旨とするものである。Further, according to the present invention, at the end of the friction stir welding operation, two plate-like members to be joined are butted to each other so as to realize a sound end face of the joining portion on the joining end side. A pin concentrically provided at the tip of a rod-shaped rotating jig is inserted into the abutting portion while rotating integrally with the agitating jig, and is moved relatively, whereby the abutting portion is friction stir welded. At the time of crimping, a tab plate that is harder than the plate members or has a hardness similar to those of the two plate members is brought into contact with the end surface of the abutting portion on the joint termination side, and A semicircular or U-shaped recess having a recess depth equal to or larger than the radius of the pin and smaller than or equal to the radius of the rotating jig is provided at a portion facing the abutting portion, and the rotating jig extends from the abutting portion. Through the recess After reaching the tab plate, a friction stir welding method Friction stir welding operation, characterized in that as caused to completion, it is an gist thereof.

【００１３】さらに、本発明は、摩擦攪拌接合操作の終
了時における、上記と同様な課題の解決を図るべく、接
合されるべき二つの板状部材を突き合わせ、その突合せ
部に対して、ロッド状の回転治具の先端に同心的に設け
たピンを、該回転治具と共に一体に回転させつつ差し込
み、相対的に移動させることにより、かかる突合せ部を
摩擦攪拌接合せしめるに際し、該二つの板状部材におけ
る、前記突合せ部の接合終端側の端面に対して、それら
板状部材よりも硬質の若しくは同様な硬さのタブ板を当
接せしめると共に、該タブ板の前記突合せ部に対向する
部位に、前記ピンの直径以上、前記回転治具の直径以下
の幅と、前記ピンの半径以上、前記回転治具の半径以下
の凹陥深さを有する矩形の凹所を設け、前記回転治具が
前記突合せ部から該凹所を経て該タブ板に達した後、摩
擦攪拌接合操作が終了せしめられるようにしたことを特
徴とする摩擦攪拌接合方法をも、その要旨とするもので
ある。Further, according to the present invention, at the end of the friction stir welding operation, in order to solve the same problem as described above, two plate-like members to be joined are butted, and the butted portion is rod-shaped. When a pin concentrically provided at the tip of the rotating jig is inserted while rotating integrally with the rotating jig and relatively moved, the two plate-shaped members are joined together when the abutting portion is friction stir welded. In the member, a tab plate that is harder than those plate members or has a similar hardness is brought into contact with the end surface on the joining end side of the abutting portion, and at a portion of the tab plate facing the abutting portion. A rectangular recess having a width not less than the diameter of the pin and not more than the diameter of the rotating jig and a recess depth not less than the radius of the pin and not more than the radius of the rotating jig. From the butt After reaching the tab plate via a recess, also the friction stir welding method Friction stir welding operation, characterized in that as caused to completion, it is an gist thereof.

【００１４】加えて、かかる摩擦攪拌接合操作の終了時
における課題を解決するための、本発明の更に異なる他
の要旨とするところは、接合されるべき二つの板状部材
を突き合わせ、その突合せ部に対して、ロッド状の回転
治具の先端に同心的に設けたピンを、該回転治具と共に
一体に回転させつつ差し込み、相対的に移動させること
により、かかる突合せ部を摩擦攪拌接合せしめるに際
し、該二つの板状部材における、前記突合せ部の接合終
端側の端面に対して、それら板状部材と同様な硬さの材
質のタブ板を当接せしめ、その状態において、前記回転
治具が前記突合せ部から該タブ板に達するまで、摩擦攪
拌接合操作を実施した後、該回転治具を形成された接合
部から引き抜き、そして該回転治具の回転方向を逆方向
とした後、該接合部の、前記突合せ部の接合終端面位置
から前記突合せ部の接合開始端側に５mm以上の距離をも
って該回転治具が位置するような部位に、該逆方向回転
の回転治具のピンを差し込み、前記タブ板に達するよう
に再度の摩擦攪拌接合操作を実施し、該回転治具の後方
肩部が前記板状部材と前記タブ板との境界を通り過ぎる
まで、かかる摩擦攪拌接合操作を継続せしめることを特
徴とする摩擦攪拌接合方法にある。In addition, another object of the present invention to solve the problem at the end of the friction stir welding operation is to bring two plate-like members to be joined together and to bring the abutting portion together. On the other hand, when a pin concentrically provided at the tip of a rod-shaped rotating jig is inserted while rotating integrally with the rotating jig and relatively moved, when such abutting portion is friction stir welded, In the two plate members, a tab plate made of a material having the same hardness as those of the plate members is brought into contact with the end surface of the abutting portion on the joining end side, and in this state, the rotating jig is After performing a friction stir welding operation from the abutting portion to the tab plate, the rotary jig is pulled out from the formed joint portion, and the rotating jig is rotated in the opposite direction, and then the welding is performed. Department The pin of the rotating jig for reverse rotation is inserted into a portion where the rotating jig is located at a distance of 5 mm or more from the joining end surface position of the butting portion to the joining starting end side of the butting portion, The friction stir welding operation is performed again so as to reach the tab plate, and the friction stir welding operation is continued until the rear shoulder of the rotary jig passes the boundary between the plate member and the tab plate. It is a characteristic friction stir welding method.

【００１５】そして、上述せる如き各種の摩擦攪拌接合
方法に従って得られた、前記二つの板状部材の接合体に
あっては、回転治具による未接合部を存在させることな
く、実質的に全体に亘って完全に接合、一体化せしめら
れているのであるが、タブ板は、そのような接合体か
ら、手、あるいは木槌等にて叩くことによって、簡単に
折り取ることが可能であり、それ故に、摩擦攪拌接合操
作の終了の後の接合体に対する仕上げ作業が簡単となる
ことに加えて、接合部の折り取られた部分も奇麗であっ
て、割れや切欠き等の欠陥が、接合体側の接合部内に入
り込む等の問題も、悉く解消せしめられ得ることとなっ
たのである。Then, in the joined body of the two plate-like members obtained by the various friction stir welding methods as described above, substantially the entire body is formed without the unjoined portion by the rotating jig. Although it is completely joined and integrated over, the tab plate can be easily broken from such a joined body by hitting it with a hand, a mallet or the like, Therefore, in addition to simplifying the finishing work on the joined body after the completion of the friction stir welding operation, the broken portion of the joined portion is also clean, and defects such as cracks and notches are Problems such as getting inside the joint on the body side could also be eliminated.

【００１６】なお、かくの如き本発明に従う摩擦攪拌接
合方法にあっては、摩擦攪拌接合操作が終了せしめられ
た後、前記二つの板状部材の接合体から前記タブ板が取
り除かれた後、接合体の接合部端面で突出するメタル
が、グラインダー等の切削機にて除去せしめられること
となる。In the friction stir welding method according to the present invention as described above, after the friction stir welding operation is completed, the tab plate is removed from the joined body of the two plate-shaped members, The metal protruding at the end face of the joined portion of the joined body is removed by a cutting machine such as a grinder.

【００１７】[0017]

【発明の実施の形態】以下、図面を参照しつつ、本発明
の構成について、更に具体的に明らかにすることとす
る。BEST MODE FOR CARRYING OUT THE INVENTION The structure of the present invention will be described more concretely with reference to the drawings.

【００１８】先ず、図２には、摩擦攪拌接合操作におけ
る接合開始端側の一つの状態が示されている。そこにお
いて、本発明に従う摩擦攪拌接合操作に用いられる、ピ
ン４を先端部に同心的に設けてなるロッド状の回転治具
６としては、従来と同様なものが用いられ、それぞれ接
合されるべき二つの板状部材２ａ，２ｂの材質よりも硬
い材料を用いて形成されており、そのため、それらピン
４や回転治具６が高速回転せしめられて、二つの部材２
ａ，２ｂの突合せ部８に差し込まれたり、それら板状部
材２ａ，２ｂの上面に、回転治具６の下部（ショルダー
部）が接触せしめられても、殆ど損耗することない非消
費型の部材とされている。なお、かかるピン４及び回転
治具６の軸心周りの高速回転は、従来と同様な回転駆動
装置（図示せず）を用いて、容易に実現され得るもので
ある。また、ピン４は、図３にも示される如く、従来と
同様に、その軸心が法線に対して接合進行方向において
角度：θをもって後傾する形態において、相対的に移動
せしめられ、以て接合が進行せしめられるようになって
いる。First, FIG. 2 shows one state at the welding start end side in the friction stir welding operation. Here, as the rod-shaped rotary jig 6 used in the friction stir welding operation according to the present invention and having the pin 4 concentrically provided at the tip end thereof, the same one as the conventional one is used and should be respectively welded. The two plate-shaped members 2a and 2b are made of a material harder than that of the two plate-shaped members 2a and 2b.
A non-consumable member that hardly wears even if the lower part (shoulder part) of the rotary jig 6 is inserted into the abutting part 8 of a, 2b or the lower surface (shoulder part) of the plate-shaped members 2a, 2b is brought into contact. It is said that. The high-speed rotation of the pin 4 and the rotary jig 6 around the axis can be easily realized by using a rotary drive device (not shown) similar to the conventional one. Further, as shown in FIG. 3, the pin 4 is relatively moved in the same manner as in the conventional case in a form in which the axis of the pin 4 is tilted backward with respect to the normal line in the joining advancing direction with an angle of θ. The joining is made to proceed.

【００１９】そして、図２においては、アルミニウム若
しくはその合金等からなる公知材質の二つの板状部材２
ａ，２ｂにおける突合せ部８の接合開始端側の端面に対
して、タブ板２０が、その一つの端面において当接せし
められて、それら二つの板状部材２ａ，２ｂと共に位置
固定に保持され、摩擦攪拌接合操作が実施されるように
なっているのである。また、かかるタブ板２０は、板状
部材２ａ，２ｂよりも硬質の材料にて形成され、或い
は、それら板状部材２ａ，２ｂと同様な硬さの材料にて
形成されているのであって、これにより、摩擦攪拌接合
後に、タブ板２０の除去が、容易に行われ得るようにな
っている。なお、このタブ板２０が、接合されるべき板
状部材２ａ，２ｂよりも軟質となると、タブ板２０のメ
タルも攪拌されて、それらタブ板２０と板状部材２ａ，
２ｂとが強固に接合せしめられるようになるのである。In FIG. 2, two plate-like members 2 made of a known material, such as aluminum or its alloy, are used.
The tab plate 20 is brought into contact with one end face of the a and 2b end face of the abutting portion 8 on the joining start end side, and is fixedly held together with the two plate-like members 2a and 2b. The friction stir welding operation is carried out. Further, the tab plate 20 is formed of a material harder than the plate members 2a and 2b, or formed of a material having the same hardness as those of the plate members 2a and 2b. Thus, the tab plate 20 can be easily removed after the friction stir welding. When the tab plate 20 becomes softer than the plate-like members 2a and 2b to be joined, the metal of the tab plate 20 is also agitated, and the tab plate 20 and the plate-like members 2a and 2b.
2b can be firmly joined.

【００２０】また、そのようなタブ板２０の板厚として
は、板状部材２ａ，２ｂと同様な板厚とされる他、タブ
板２０の上面の高さが、板状部材２ａ，２ｂの上面の高
さの７割以上の高さにおいてセットし得るような厚さと
されることとなる。なお、タブ板２０の上面の高さが、
接合されるべき二つの板状部材２ａ，２ｂの上面の高さ
の７割未満となると、端部から湧き出るメタルを押さえ
るタブ板２０の役目を為さず、タブ板２０と板状部材２
ａ，２ｂとの板厚差の部分からメタルが湧き出てしまう
問題があり、また、タブ板２０の上面が、板状部材２
ａ，２ｂの上面よりも高くなると、摩擦攪拌接合操作に
より、タブ板２０を優先的に攪拌してしまい、接合が困
難となる問題を惹起する。The tab plate 20 has the same thickness as the plate members 2a and 2b, and the height of the upper surface of the tab plate 20 is higher than that of the plate members 2a and 2b. The thickness is set so that it can be set at 70% or more of the height of the upper surface. The height of the upper surface of the tab plate 20 is
When the height of the upper surfaces of the two plate-like members 2a and 2b to be joined is less than 70%, the tab plate 20 and the plate-like member 2 do not serve as the tab plate 20 that presses the metal spouting from the ends.
There is a problem that metal is boiled out from a portion having a plate thickness difference between the plate member 2 and the plate member 2a.
When the height is higher than the upper surfaces of a and 2b, the tab plate 20 is preferentially stirred by the friction stir welding operation, causing a problem of difficulty in joining.

【００２１】なお、かかる図２においては、回転治具６
のピン４が差し込まれる接合開始点から、回転治具６が
突合せ部８に沿って少し移動し、摩擦攪拌接合操作が少
し進んで、接合部１０が接合開始部位から延びている状
態が示されているが、本発明にあっては、そのような回
転治具６におけるピン４の、接合開始時における差込位
置が、接合開始端側の板状部材２ａ，２ｂの端面とピン
４先端部における最先端位置との間の距離が３mm以下と
なるように設定されて、摩擦攪拌接合操作を開始するよ
うにしているのである。なお、この際、ピン４の差込位
置は、タブ板２０上には設定されないようになってい
る。In FIG. 2, the rotating jig 6 is used.
From the welding start point where the pin 4 is inserted, the rotary jig 6 moves a little along the abutting portion 8, the friction stir welding operation slightly advances, and the welding portion 10 extends from the welding start portion. However, in the present invention, the insertion position of the pin 4 in such a rotary jig 6 at the start of joining is determined by the end faces of the plate-like members 2a and 2b on the joining start end side and the tip of the pin 4. The friction stir welding operation is started by setting the distance to the most distal end position at 3 mm or less. At this time, the insertion position of the pin 4 is not set on the tab plate 20.

【００２２】具体的には、図３の（ａ）及び（ｂ）に示
されるように、回転治具６のピン４が突合せ部８に差し
込まれたとき、かかるピン４の先端部における最先端位
置、即ち図３（ａ）においては、ピン先端部における左
端位置と、板状部材２ａ，２ｂの端面との間の距離：ｘ
が３mm以下となるようにして、摩擦攪拌接合操作が開始
せしめられるのであり、これによって、回転治具６の回
転により、攪拌されたメタルが外部に漏れるのを効果的
に抑制乃至は阻止しつつ、接合開始端側における未接合
部の発生を効果的に回避乃至は抑制して、接合部１０の
形成が有利に実現せしめられ得ることとなるのである。
なお、かかる板状部材２ａ，２ｂ端面と、ピン４先端部
における最先端位置との間の距離：ｘが、３mmを超える
ようになると、接合開始端側部分の攪拌が不十分とな
り、未接合部（１２）を惹起せしめたり、或いは欠陥を
内在する接合部１０が生じたりする問題を発生させるこ
ととなる。Specifically, as shown in FIGS. 3 (a) and 3 (b), when the pin 4 of the rotary jig 6 is inserted into the abutting portion 8, the tip end of the pin 4 is advanced. Position, that is, in FIG. 3A, the distance between the left end position at the tip of the pin and the end faces of the plate-shaped members 2a and 2b: x
The friction stir welding operation is started so that the value becomes 3 mm or less, which effectively suppresses or prevents the stirred metal from leaking to the outside due to the rotation of the rotating jig 6. Therefore, it is possible to effectively avoid or suppress the generation of the unjoined portion on the joining start end side, and the formation of the joined portion 10 can be advantageously realized.
When the distance x between the end faces of the plate-shaped members 2a and 2b and the tip end of the pin 4 exceeds 3 mm, stirring at the joining start end side portion becomes insufficient and unjoined. This causes the problem that the part (12) is caused or the joint part 10 having a defect is generated.

【００２３】ここで、回転治具６のピン４の形状として
は、図３（ａ）に示される如き台形形状の他、先端部が
丸められた各種の形状も採用され得るところから、ピン
４の先端部における最先端位置は、図３（ｂ）に示され
る如く、ピン４の傾斜操作状態も考慮して、摩擦攪拌接
合操作におけるピン４の最先端の位置とし、これと板状
部材２ａ，２ｂ端面との間の距離が、前記ｘとして、そ
の値が３mm以下となるようにして、前記摩擦攪拌接合操
作が開始せしめられることとなる。Here, as the shape of the pin 4 of the rotary jig 6, in addition to the trapezoidal shape as shown in FIG. 3 (a), various shapes with rounded tips can be adopted. As shown in FIG. 3 (b), the most distal position of the tip end of the pin 4 is the most distal position of the pin 4 in the friction stir welding operation in consideration of the tilting operation state of the pin 4 and the plate member 2a. , 2b, and the distance between the end faces is 2 mm or less, and the friction stir welding operation is started.

【００２４】また、回転治具６のピン４の挿入深さとし
ては、ピン４の先端から板状部材２ａ，２ｂの裏面まで
の距離：ｄが１mm以下となるようにして、摩擦攪拌接合
を行うようにすることが望ましく、それは、特に、板状
部材２ａ，２ｂの板厚が２mm以上の場合において有効で
ある。なお、裏面からの距離が１mmを超えるようになる
と、回転治具６のピン４による攪拌作用が、板状部材２
ａ，２ｂの厚さ全体に行き渡らず、その裏面近傍におい
て、欠陥のある接合部が発生する問題が惹起され易くな
る。Further, as the insertion depth of the pin 4 of the rotary jig 6, the distance from the tip of the pin 4 to the back surface of the plate-like members 2a, 2b: d is 1 mm or less, and friction stir welding is performed. It is desirable to do so, which is particularly effective when the plate members 2a and 2b have a plate thickness of 2 mm or more. When the distance from the back surface exceeds 1 mm, the pin 4 of the rotating jig 6 causes the stirring action by the plate-shaped member 2
It is easy to cause a problem that a defective joint portion is generated in the vicinity of the back surface of the a and 2b without reaching the entire thickness.

【００２５】そして、かくの如き接合開始時において
は、図３にも示される如く、回転治具６の肩部がタブ板
２０の側にはみ出し、そのような肩部によって、接合開
始端側の板状部材２ａ，２ｂ部分を攪拌する効果も発揮
され得るようになるために、より良い攪拌が実現され得
ることとなるのであり、以て、欠陥のない健全な接合部
が端部に形成されることとなるが、特に、そのような回
転治具６の肩部による攪拌作用は、板状部材２ａ，２ｂ
の板厚が２mmよりも薄い場合において、より一層有効に
発揮せしめられ得るのである。At the start of the joining as described above, as shown in FIG. 3, the shoulder portion of the rotary jig 6 protrudes toward the tab plate 20 side, and such a shoulder portion causes the joining start end side to move. Since the effect of stirring the plate-shaped members 2a and 2b can also be exhibited, better stirring can be realized, and thus a sound joint having no defect is formed at the end. In particular, the stirring action of the shoulder portion of the rotary jig 6 is particularly caused by the plate-shaped members 2a and 2b.
When the plate thickness is less than 2 mm, it can be exhibited more effectively.

【００２６】ところで、本発明は、また、摩擦攪拌接合
操作の終了時においても、タブ板と回転治具の使用態様
に工夫を加えることによって、前記した従来の問題を有
利に解消し得るようにしたものでもあって、その一例
が、図４に示されている。By the way, according to the present invention, even when the friction stir welding operation is completed, the conventional problems described above can be advantageously solved by devising the usage mode of the tab plate and the rotary jig. FIG. 4 shows an example thereof.

【００２７】すなわち、図４においては、二つの板状部
材２ａ，２ｂにおける突合せ部８の接合終端側の端面に
対して、それら板状部材２ａ，２ｂよりも硬質である
か、或いはそれと同様な硬さのタブ板３０が、その一つ
の端面（側面）において、当接せしめられ、位置固定に
保持されている。また、かかるタブ板３０の突合せ部８
に対向する部位には、所定の凹陥深さを有する半円形の
凹所３２が、設けられている。そして、回転治具６が、
突合せ部８から、そのような凹所３２を経て、タブ板３
０に到達した後、タブ板３０から回転治具６が引き抜か
れることにより、摩擦攪拌接合操作が終了せしめられる
ようにされるのである。That is, in FIG. 4, the end faces of the two plate-shaped members 2a and 2b on the joint termination side of the abutting portion 8 are harder than the plate-shaped members 2a and 2b, or similar thereto. A tab plate 30 having a hardness is brought into contact with one end face (side face) of the tab plate 30 and is fixedly held. In addition, the abutting portion 8 of the tab plate 30
A semi-circular recess 32 having a predetermined recess depth is provided in a portion facing to. And the rotating jig 6
From the abutting portion 8 through such a recess 32, the tab plate 3
After reaching 0, the rotary jig 6 is pulled out from the tab plate 30, so that the friction stir welding operation is completed.

【００２８】なお、このような摩擦攪拌接合操作におけ
る接合終端側に配されるタブ板３０に設けられる凹所３
２としては、図５（ａ）や（ｂ）に示される如く、半円
形状のものの他、Ｕ字形状のものが採用され得るが、そ
れら形状の凹所３２の凹陥深さ：ｙとしては、回転治具
６におけるピン４の半径以上、該回転治具６の半径以下
の値を有するものであって、このような凹所３２を通っ
て、回転治具６を、突合せ部８からタブ板３０上に導く
ようにすることによって、摩擦攪拌接合操作の終了後に
おけるタブ板３０の取り除き作業が、有利に行われ得る
こととなるのである。Incidentally, the recess 3 provided in the tab plate 30 arranged on the joining end side in such a friction stir welding operation.
As shown in FIGS. 5 (a) and 5 (b), a U-shaped one may be used as the 2 as shown in FIGS. 5 (a) and 5 (b). , Having a value not less than the radius of the pin 4 in the rotating jig 6 and not more than the radius of the rotating jig 6, the rotating jig 6 is passed through the recess 32 from the abutting portion 8 to the tab. By introducing the tab plate 30 onto the plate 30, the work of removing the tab plate 30 after the friction stir welding operation is completed can be advantageously performed.

【００２９】すなわち、そのような凹所３２の存在によ
って、二つの板状部材２ａ，２ｂのピン４によるメタル
の攪拌を一旦終了させる効果があるのであるが、そのよ
うな凹所３２が、回転治具６の半径よりも深い凹陥深さ
となると、メタルの湧き出しが多くなって、端部に欠陥
が発生する問題がある。また、そのような凹所３２の設
けられていない、或いはピン４の半径よりも浅い凹陥深
さ（ｙ）の凹所３２が設けられても、板状部材２ａ，２
ｂとタブ板３０との間での攪拌が惹起され、それらの材
質が混合されたメタルからなる接合部が、端部に形成さ
れてしまう問題があり、そして、タブ板３０よりも板状
部材２ａ，２ｂが軟質或いはほぼ同じ硬さであるところ
から、タブ板３０を、それら二つの板状部材２ａ，２ｂ
の接合体から取り除く際に、かかる接合体側で割れ易く
なってしまう問題があるからである。That is, the presence of such a recess 32 has the effect of once ending the stirring of the metal by the pin 4 of the two plate-shaped members 2a and 2b. If the depth of the recess is deeper than the radius of the jig 6, there is a problem that the amount of metal flowing out increases and defects occur at the ends. Further, even if such a recess 32 is not provided or a recess 32 having a recess depth (y) shallower than the radius of the pin 4 is provided, the plate-shaped members 2a, 2
There is a problem that stirring between b and the tab plate 30 is caused, and a joint part made of a metal mixed with these materials is formed at the end part. Since the tabs 30a and 30b are soft or have substantially the same hardness, the tab plate 30 is attached to the two tabular members 2a and 2b.
This is because there is a problem that the bonded body is easily cracked when it is removed from the bonded body.

【００３０】なお、かかる半円形状乃至はＵ字形状の配
設位置としては、二つの板状部材２ａ，２ｂの突合せ部
８の延長線上に、そのような凹所３２の中心線が位置せ
しめられる形態が有利に採用され、これによって、ピン
４によるメタルの攪拌作用の一時的な終了効果が、有利
に実現されることとなるのである。As a disposition position of such a semicircular shape or a U shape, the center line of such a recess 32 should be located on the extension line of the abutting portion 8 of the two plate members 2a and 2b. Therefore, the effect of temporarily ending the stirring action of the metal by the pin 4 is advantageously realized.

【００３１】尤も、かかる凹所３２としては、図５の
（ａ）に示される半円形状や、（ｂ）に示されるＵ字形
状のほか、図６に示される如き矩形形状を呈する凹所３
２構造も、採用可能である。Of course, as the recess 32, a semi-circular shape shown in FIG. 5A, a U-shape shown in FIG. 5B, and a rectangular recess shown in FIG. Three
Two structures can also be adopted.

【００３２】そして、かかる矩形形状の凹所（切り欠
き）３２としては、その凹陥深さ：ｙが、ピン４の半径
以上、回転治具６の半径以下の値とされると共に、凹所
３２の幅：ｚとしては、ピン４の直径以上、回転治具６
の直径以下の値となるように、タブ板３０に形成され、
二つの板状部材２ａ，２ｂの突合せ部８に対向せしめら
れるのである。なお、そのような凹所３２の凹陥深さ：
ｙや幅：ｚが、上記した寸法未満であると、タブ板３０
のメタルが端部に混合されてしまい、タブ板３０を取り
除く際に、接合体（２ａ，２ｂ）側において割れ易くな
ってしまう問題があり、また、それらの寸法を超えた場
合にあっては、凹みによる空間部に板状部材２ａ，２ｂ
のメタルが湧き出し易くなり、そのために、肉不足或い
は欠陥を内在する接合端部となってしまう問題が惹起さ
れるのである。As for the rectangular recess (notch) 32, the recess depth: y is set to a value not less than the radius of the pin 4 and not more than the radius of the rotating jig 6, and the recess 32 is provided. Width: z is equal to or larger than the diameter of the pin 4 and the rotating jig 6
Is formed on the tab plate 30 to have a value equal to or smaller than the diameter of
The two plate-shaped members 2a and 2b are opposed to the abutting portion 8. In addition, the recess depth of such a recess 32:
If y or width: z is less than the above-mentioned dimensions, the tab plate 30
When the tab plate 30 is removed, there is a problem that the metal of (3) is mixed in the end portion, and the bonded body (2a, 2b) side is easily cracked, and when the dimensions are exceeded, , The plate-like members 2a, 2b in the space formed by the depression
That is, the metal is likely to spill out, which causes a problem of lack of meat or defects at the joint end.

【００３３】さらに、図７に示される摩擦攪拌接合操作
における接合終了側端部の形成に際しては、先ず、二つ
の板状部材２ａ，２ｂにおける突合せ部８の接合終端側
の端面に対して、それら板状部材２ａ，２ｂと同様な硬
さのタブ板４０が、その一つの端面（側面）において当
接せしめられ、その状態を固定せしめた形態において、
回転治具６が突合せ部８に沿って移動せしめられ、かか
る突合せ部８からタブ板４０上に達するまで、摩擦攪拌
接合操作が実施される。そして、回転治具６がタブ板４
０上に達した後、そこに形成された接合部１０から回転
治具６が引き抜かれるのである。なお、接合部１０は、
二つの板状部材２ａ，２ｂから、タブ板４０上に至るよ
うに形成されることとなる。なお、このように、回転治
具６を、二つの板状部材２ａ，２ｂの突合せ部８から、
タブ板４０上にまで効果的に到達させるために、それら
二つの板状部材２ａ，２ｂの上面高さとタブ板４０の上
面高さの差は１mm以内とすることが望ましく、これに反
して、１mmを超える高さの差が存在する場合にあって
は、タブ板４０と板状部材２ａ，２ｂとの境目における
攪拌が不均一となって、欠陥を生じる原因となるおそれ
がある。Further, in forming the joining end side end portion in the friction stir welding operation shown in FIG. 7, first, with respect to the joining end side end surface of the abutting portion 8 of the two plate-shaped members 2a, 2b, In a form in which the tab plate 40 having the same hardness as the plate-shaped members 2a and 2b is brought into contact with one end surface (side surface) thereof and the state is fixed,
The rotating jig 6 is moved along the abutting portion 8, and the friction stir welding operation is performed until the rotating jig 6 reaches the tab plate 40 from the abutting portion 8. Then, the rotating jig 6 becomes the tab plate 4
After reaching 0, the rotary jig 6 is pulled out from the joint portion 10 formed there. The joint portion 10 is
The two plate-shaped members 2a and 2b are formed so as to reach the tab plate 40. In this way, the rotary jig 6 is moved from the abutting portion 8 of the two plate-shaped members 2a and 2b to
In order to effectively reach the tab plate 40, it is desirable that the difference between the upper surface heights of the two plate-shaped members 2a and 2b and the upper surface height of the tab plate 40 be within 1 mm. On the contrary, When there is a height difference of more than 1 mm, the stirring at the boundary between the tab plate 40 and the plate-shaped members 2a and 2b becomes non-uniform, which may cause a defect.

【００３４】次いで、かかる引き抜かれた回転治具６
は、先の回転方向とは逆方向に回転せしめられるように
された後、先に形成された接合部１０の突合せ部８の接
合終端面（板状部材２ａ，２ｂの端面）位置から、突合
せ部８の接合開始端側に５mm以上の距離をもって、換言
すれば、図７におけるタブ板４０と回転治具６との距
離：Ｌが５mm以上となるような距離において、回転治具
６（ピン４）が再び接合部１０に差し込まれ、そして、
タブ板４０に達するように、再度の摩擦攪拌接合操作
が、回転治具６の逆方向回転状態の下において、実施さ
れるのである。そして、そのような回転治具６の後方肩
部が、板状部材２ａ，２ｂとタブ板４０との境界を通り
過ぎるまで、従って回転治具６が完全にタブ板４０上に
位置するようになるまで、かかる摩擦攪拌接合操作が継
続せしめられるのであり、そして、その後に、回転治具
６がタブ板４０から引き抜かれることによって、摩擦攪
拌接合操作が終了せしめられるのである。Then, the rotary jig 6 thus pulled out.
Is made to rotate in a direction opposite to the direction of the previous rotation, and then the abutment portion 8 of the abutment portion 8 of the previously formed abutment portion 10 is abutted from the joining end surface (the end surface of the plate-shaped members 2a, 2b). At a distance of 5 mm or more on the joining start end side of the portion 8, in other words, at a distance L between the tab plate 40 and the rotating jig 6 in FIG. 4) is plugged back into the joint 10, and
The friction stir welding operation is performed again so that the tab plate 40 is reached while the rotary jig 6 is rotated in the reverse direction. Then, until the rear shoulder portion of the rotary jig 6 passes over the boundary between the plate-shaped members 2a and 2b and the tab plate 40, the rotary jig 6 is completely positioned on the tab plate 40. Up to this point, the friction stir welding operation is continued, and after that, the rotary jig 6 is pulled out from the tab plate 40, whereby the friction stir welding operation is ended.

【００３５】なお、かかる逆方向回転の回転治具６のピ
ン４が差し込まれる位置がＬ：５mmに満たない接合部１
０に対して、ピン４の差し込みが実施され、再度の摩擦
攪拌接合操作が実施される場合にあっては、タブ板４０
と板状部材２ａ，２ｂとの境目に近くなり過ぎて、かか
る境目における両者のメタルの混合が過度となり、その
ようなタブ板４０と接合体２ａ，２ｂとの離脱に際し
て、その境目にて奇麗に割ることが困難となるのであ
る。また、かかる逆回転の回転治具６による再度の摩擦
攪拌接合操作にて、そのような境目を通過させることに
より、該境目のメタルにメタルフローの界面が発生し、
その部分において割れ易くなり、以て接合体（２ａ，２
ｂ）の端面の健全性の向上に、著しく寄与せしめ得るこ
ととなるのである。The position where the pin 4 of the rotating jig 6 for the reverse rotation is inserted is less than L: 5 mm.
When the pin 4 is inserted into 0 and the friction stir welding operation is performed again, the tab plate 40
And the plate-shaped members 2a and 2b are too close to each other, and the metal of both of them is excessively mixed at such a boundary, and when the tab plate 40 and the joined bodies 2a and 2b are separated from each other, the boundary is beautiful. It becomes difficult to divide into. In addition, when the friction stir welding operation is performed again by the rotating jig 6 of the reverse rotation, by passing through such a boundary, a metal flow interface is generated in the metal of the boundary,
It becomes easy to crack at that portion, and thus the bonded body (2a, 2
This can significantly contribute to the improvement of the soundness of the end face of b).

【００３６】また、上記の何れの方法においても、タブ
板２０，３０，４０は、手或いは木槌等で、簡単に折り
取ることが可能であり、以て、健全な端部が有利に実現
され得るのであるが、また、必要に応じて、そのような
タブ板を取り除いた後、端面に湧き出したメタルをグラ
インダー等の切削機にて切削除去せしめ、端面を仕上げ
ることも、本発明においては、有利に採用されることと
なる。図８には、図６に示されるタブ板３０を用いて摩
擦攪拌接合して得られた接合体より、タブ板３０を折り
取り、その端部に形成される突出部（メタル）３４を、
グラインダー等によって切削して、端面を仕上げて、目
的とする接合体を得る形態が示されている。Further, in any of the above methods, the tab plates 20, 30, 40 can be easily broken off by a hand or a mallet, so that a sound end can be advantageously realized. However, if necessary, after removing such a tab plate, the metal bubbling at the end face is cut and removed by a cutting machine such as a grinder, and the end face is also finished in the present invention. , Will be advantageously adopted. In FIG. 8, the tab plate 30 is folded off from the joined body obtained by friction stir welding using the tab plate 30 shown in FIG. 6, and the protruding portion (metal) 34 formed at the end thereof is
A form is shown in which the end surface is finished by cutting with a grinder or the like to obtain a desired bonded body.

【００３７】そして、かくの如き摩擦攪拌接合手法にて
得られる接合体の端部端面が、効果的に健全化せしめら
れることにより、本発明は、例えば、アルミニウム合金
の板材や押出し材等の展伸材や鋳物を接合し、アルミニ
ウム合金の大型材を製造する技術に有利に適用され得る
のであり、また、そのようにして得られた接合材は、鉄
道車両行体や自動車の外板、サブフレーム及びホイール
等の部材に適しており、アルミニウム合金の大型材の接
合に有利に採用され得て、その特徴を発揮するものであ
る。The end face of the joined body obtained by the friction stir welding method as described above is effectively made sound, so that the present invention can be applied to, for example, spreading of aluminum alloy plate material or extruded material. It can be advantageously applied to the technology of manufacturing large-sized aluminum alloy materials by joining drawn materials and castings, and the joining materials thus obtained can be applied to railcar rows, automobile outer panels, and sub-boards. It is suitable for members such as frames and wheels, and can be advantageously used for joining large-sized aluminum alloy materials to exert its characteristics.

【００３８】[0038]

【実施例】以下に、本発明の実施例を示し、本発明を更
に具体的に明らかにすることとするが、本発明が、その
ような実施例の記載によって何等の制約をも受けるもの
でないことは言うまでもないところである。また、本発
明には、以下の実施例の他にも、更には上記した具体的
構成以外にも、本発明の趣旨を逸脱しない限りにおい
て、当業者の知識に基づいて種々なる変更、修正、改良
等を加え得るものであることが理解されるべきである。The present invention will be described in more detail below by showing examples of the present invention, but the present invention is not limited by the description of such examples. Needless to say. Further, in addition to the specific configurations described above, in addition to the following embodiments, the present invention includes various changes and modifications based on the knowledge of those skilled in the art without departing from the spirit of the present invention. It should be understood that improvements and the like can be added.

【００３９】実施例 １ 板厚：４mm、板幅：３００mm、長さ：５０００mm、材
質：６Ｎ０１−Ｔ５のアルミニウム合金押出型材の２枚
を供試材として用い、それらの板幅方向に対向する側面
を突き合わせて、テーブル上に固定せしめた。また、そ
れら突き合わされた２枚の供試材の接合開始側の端部に
は、板厚：３．５mm（供試材板厚に対して８７．５
％）、サイズ：５０mm×５０mmの鋼板（材質：ＳＳ４
０）をタブ板として用いて、図２に示される如く突き合
せて、テーブル上に固定せしめた。Example 1 Two pieces of an aluminum alloy extruded material having a plate thickness of 4 mm, a plate width of 300 mm, a length of 5000 mm and a material of 6N01-T5 were used as test materials, and the side surfaces facing each other in the plate width direction. Butt and fixed it on the table. In addition, at the end of the joining start side of the two butted test materials, the plate thickness: 3.5 mm (87.5 with respect to the test material plate thickness).
%), Size: 50 mm x 50 mm steel plate (material: SS4
0) was used as a tab plate, but they were butted and fixed on the table as shown in FIG.

【００４０】一方、回転治具としては、肩径：１７mm、
ピン長さ（高さ）：３．９mm、ピン径：３mmのものを用
い、回転数：３０００ｒｐｍ、速度：５００mm／分の接
合条件下において、摩擦攪拌接合を実施した。なお、回
転治具先端に設けたピンを、供試材の突合せ部に挿入し
た際のピン先端部における最先端位置と接合開始端側の
供試材端面（供試材とタブ板との当接面）との間の距
離：ｘを３mmとして、差し込み、かかる摩擦攪拌接合操
作を開始した。On the other hand, as the rotating jig, the shoulder diameter: 17 mm,
Using a pin length (height) of 3.9 mm and a pin diameter of 3 mm, friction stir welding was performed under the welding conditions of a rotation speed of 3000 rpm and a speed of 500 mm / min. When the pin provided at the tip of the rotating jig is inserted into the butt part of the test material, the tip position of the pin tip and the end surface of the test material at the joining start end side (contact between the test material and the tab plate) The distance from the contact surface): x was set to 3 mm, and the friction stir welding operation was started.

【００４１】その結果、回転治具は、タブ板（鋼板）に
接触することなく回転し、また、２枚の供試材を接合し
て得られた接合材（接合体）においては、その接合開始
端部から、外観上においても、健全な接合部となってい
ることを認めた。更に、かかる得られた接合材の頭部の
引張試験を行ったところ、その引張強さは１９８ＭＰ
ａ、継手効率は８１％と健全であり、接合部の断面マク
ロ組織の観察結果からしても、接合頭部において亀裂や
トンネルポアーの等の欠陥はなく、健全な接合部である
ことを認めた。As a result, the rotating jig rotates without coming into contact with the tab plate (steel plate), and in the joining material (joined body) obtained by joining two test materials, the joining From the starting end, it was confirmed that the appearance of the joint was sound. Furthermore, when a tensile test of the head of the obtained bonding material was conducted, the tensile strength was 198 MP.
a, the joint efficiency was 81%, which was sound, and it was confirmed from the observation results of the cross-section macrostructure of the joint that there was no defect such as cracks or tunnel pores in the joint head, and the joint was sound. It was

【００４２】実施例 ２ 板厚：１．８mm、板幅：７２mm、長さ：３００mm、材
質：５４５４−Ｏのアルミニウム板材の２枚を供試材と
して用い、それらを幅方向に突き合せて、摩擦攪拌接合
を施すためのテーブル上に固定せしめた。また、それら
供試材の接合開始側の端部には、板厚：１．３mm（供試
材板厚の７２％）、サイズ：５０mm×５０mmの鉄板をタ
ブ板として用いて突き合わせ、供試材と同様にテーブル
上に固定せしめた。Example 2 Two pieces of aluminum plate material having a plate thickness of 1.8 mm, a plate width of 72 mm, a length of 300 mm, and a material of 5454-O were used as test materials, and they were butted in the width direction. It was fixed on a table for friction stir welding. At the end of the joining side of these specimens, a steel plate with a thickness of 1.3 mm (72% of the thickness of the specimen) and a size of 50 mm x 50 mm was used as a tab plate, but abutted against each other. Like the lumber, it was fixed on the table.

【００４３】回転治具として、肩径：１５mm、ピン長
さ：１．７mm、ピン径：４mmのものを用い、回転数：１
５００ｒｐｍ、速度：３００mm／分の接合条件の下にお
いて、摩擦攪拌接合操作を実施した。なお、回転治具の
先端部のピンを供試材の突合せ部に挿入した際に、かか
る回転治具の肩部がタブ板側にはみ出すようにして、摩
擦攪拌接合操作を開始した。A rotating jig having a shoulder diameter of 15 mm, a pin length of 1.7 mm and a pin diameter of 4 mm is used, and the number of rotations is 1
Friction stir welding operation was performed under the welding conditions of 500 rpm and speed: 300 mm / min. The friction stir welding operation was started by inserting the pin at the tip of the rotating jig into the butt portion of the test material so that the shoulder of the rotating jig protruded toward the tab plate side.

【００４４】その結果、回転治具は、タブ板としての鉄
板に接触することなく回転したが、二つの供試材を接合
して得られる接合材の接合開始側の端部には、若干のメ
タルの突出が認められた。また、接合材の頭部に対する
引張試験の結果、引張強さは２３５ＭＰａであり、継手
効率は９４％となり、健全であった。更に、接合部の断
面マクロ組織の観察結果においても、接合頭部において
亀裂やトンネルポアー等の欠陥は全く認められず、健全
な接合部であることを認めた。また、接合開始側端部に
認められた若干のメタル突出部は、グラインダーで仕上
げることにより、外観上も健全な端面が得られた。As a result, the rotating jig rotated without contacting the iron plate serving as the tab plate, but the end of the joining material obtained by joining the two test materials at the joining start side had a slight amount. Metal protrusion was observed. As a result of a tensile test on the head of the bonding material, the tensile strength was 235 MPa and the joint efficiency was 94%, which was sound. Further, in the observation result of the cross-sectional macrostructure of the joint, no defects such as cracks or tunnel pores were observed at the joint head, and it was confirmed that the joint was sound. In addition, the slight metal protrusions found at the end portion on the joining start side were finished with a grinder to obtain an end surface that was sound in appearance.

【００４５】比較例 １ 板厚：４mm、板幅：３００mm、長さ：５０００mm、材
質：６Ｎ０１−Ｔ５のアルミニウム押出型材の２枚を供
試材として、それらを幅方向に突き合せてテーブル上に
固定せしめた。また、それら供試材の接合開始側の端部
には、板厚：２．５mm（供試材板厚の６２．５％）、サ
イズ：５０mm×５０mmの鉄板を突き合せてテーブル上に
固定せしめた。Comparative Example 1 Two pieces of aluminum extruded material having a plate thickness of 4 mm, a plate width of 300 mm, a length of 5000 mm and a material of 6N01-T5 were used as test materials, and they were butted in the width direction and placed on a table. I fixed it. At the end of the joining side of these specimens, a steel plate of 2.5 mm (62.5% of the specimen thickness) and size: 50 mm x 50 mm is abutted and fixed on the table. I'm sorry.

【００４６】また、回転治具としては、肩径：１５mm、
ピン長さ：３．９mm、ピン径：４mmのものを用い、回転
数：１５００ｒｐｍ、速度：３００mm／分の接合条件の
下において、摩擦攪拌接合操作を開始した。なお、ピン
を挿入した際の、ピン先端部における最先端位置と供試
材端面との間の距離（ｘ）は、２mmであった。As the rotating jig, the shoulder diameter: 15 mm,
Using a pin length of 3.9 mm and a pin diameter of 4 mm, the friction stir welding operation was started under the welding conditions of a rotation speed of 1500 rpm and a speed of 300 mm / min. The distance (x) between the tip of the pin and the end surface of the test material when the pin was inserted was 2 mm.

【００４７】その結果、回転治具は、鉄板に接触するこ
となく回転したものの、端部からのメタルの湧き出しが
多く、外観上健全な接合部ではなかった。更に、接合部
の断面マクロ組織の観察結果でも、接合頭部において、
トンネルポアー等の多数の欠陥が存在することを認め
た。As a result, although the rotating jig rotated without coming into contact with the iron plate, a large amount of metal spilled out from the end portion, and it was not a sound joint in appearance. Furthermore, even in the observation result of the cross-sectional macrostructure of the joint, at the joint head,
It was confirmed that there were many defects such as tunnel pores.

【００４８】比較例 ２ 板厚：４mm、板幅：３００mm、長さ：５０００mm、材
質：６Ｎ０１−Ｔ５のアルミニウム押出型材の２枚を供
試材として用い、それらを幅方向に突き合せてテーブル
上に固定せしめた。また、それら供試材の接合開始側の
端部には、板厚：３．５mm（供試材板厚の８７．５
％）、サイズ：５０mm×５０mmの鉄板を突き合せて、同
様に固定せしめた。また、回転治具として、肩径：１５
mm、ピン長さ：２．８mm、ピン径：４mmのものを用い、
回転数：１５００ｒｐｍ、速度：３００mm／分の接合条
件の下において摩擦攪拌接合操作を開始した。なお、ピ
ンを挿入した際の、ピン先端部における最先端位置と供
試材端面との間の距離（ｘ）を３mmとした。Comparative Example 2 Two pieces of aluminum extruded material having a plate thickness of 4 mm, a plate width of 300 mm, a length of 5000 mm and a material of 6N01-T5 were used as test materials, and they were butted in the width direction and placed on a table. I fixed it to. At the end of the joining side of these specimens, the plate thickness: 3.5 mm (87.5 of the specimen plate thickness).
%), Size: 50 mm × 50 mm iron plates were butted and similarly fixed. Also, as a rotating jig, shoulder diameter: 15
mm, pin length: 2.8 mm, pin diameter: 4 mm,
The friction stir welding operation was started under the welding conditions of a rotation speed of 1500 rpm and a speed of 300 mm / min. The distance (x) between the tip of the pin and the end face of the test material when the pin was inserted was 3 mm.

【００４９】その結果、回転治具は、鉄板に接触するこ
となく回転し、接合材の接合開始側端部から、外観上は
健全な接合部であることを認めたが、接合部の断面マク
ロ組織の観察結果では、特に、接合材裏面側に接合不十
分による亀裂があることを認めた。As a result, it was confirmed that the rotary jig rotated without contacting the iron plate, and the joint was a sound joint from the end of the joining material on the joining start side. From the observation result of the structure, in particular, it was confirmed that there was a crack on the back surface side of the bonding material due to insufficient bonding.

【００５０】実施例 ３ 板厚：４mm、板幅：３００mm、長さ：５０００mm、材
質：６Ｎ０１−Ｔ５のアルミニウム押出型材の２枚を供
試材として用い、それらを幅方向に突き合せて、摩擦攪
拌接合のためのテーブル上に固定せしめた。また、それ
ら供試材の突合せ部の接合終了側の端部には、図４に示
されるように、半径：２mmの半円形状の凹所を刳り抜い
た板厚：４mm（供試材板厚と同じ）、サイズ：５０mm×
５０mmの鋼板（材質：ＳＳ４０）を、かかる凹所が突合
せ部に対向するようにして、且つ突合せ部の延長線によ
って凹所が二等分されるように、供試材端面に当接せし
めて、供試材と同様にテーブル上に固定せしめた。Example 3 Two pieces of aluminum extruded material having a plate thickness of 4 mm, a plate width of 300 mm, a length of 5000 mm, and a material of 6N01-T5 were used as test materials, and they were butted in the width direction and rubbed. It was fixed on a table for stir welding. In addition, as shown in FIG. 4, a semi-circular recess having a radius of 2 mm is hollowed out at the end portion of the butt portion of these test materials at the joining end, and the plate thickness is 4 mm (test material plate Same as thickness), size: 50 mm x
A 50 mm steel plate (material: SS40) is brought into contact with the end surface of the test material so that the recess faces the abutting portion and the extension line of the abutting portion divides the recess into two equal parts. , Was fixed on the table in the same manner as the test material.

【００５１】また、回転治具としては、肩径：１７mm、
ピン長さ：３．９mm、ピン径：４mmのものを用い、回転
数：１５００ｒｐｍ、速度：５００mm／分の接合条件の
下において、摩擦攪拌接合操作を実施した。そして、か
かる回転治具の接合方向における後方肩部が、供試材と
タブ板との境目から２mmの長さでタブ板側に進んだとこ
ろで、回転治具を引き抜き、摩擦攪拌接合操作を終了し
た。As the rotating jig, the shoulder diameter: 17 mm,
A friction stir welding operation was performed under the welding conditions of a rotation speed of 1500 rpm and a speed of 500 mm / min using a pin length of 3.9 mm and a pin diameter of 4 mm. Then, when the rear shoulder portion of the rotating jig in the joining direction advances to the tab plate side with a length of 2 mm from the boundary between the specimen and the tab plate, the rotating jig is pulled out, and the friction stir welding operation is completed. did.

【００５２】かくして得られた２枚の供試材からなる接
合材に付着するタブ板を、木槌を用いて取り除いたとこ
ろ、接合部の終端部に若干バリが生じた形態において割
れ、接合材側には、そのような割れが何等至るものでは
なかった。そして、そのような接合材尾部の引張試験の
結果、引張強さは１９８Ｍｐａ、継手効率は８１％と健
全であり、接合部の断面マクロ組織の観察結果でも、接
合尾部において、亀裂やトンネルポアー等の欠陥は認め
られず、健全な接合部であった。なお、端部の若干のバ
リはグラインダーで仕上げることで、外観上も健全な端
面とすることが出来た。When the tab plate adhering to the joining material consisting of the two test materials thus obtained was removed using a mallet, it was cracked in the form in which some burrs were generated at the terminal end of the joining portion, and the joining material On the side, there were no such cracks. Then, as a result of the tensile test of such a joining material tail, the tensile strength is 198 Mpa and the joint efficiency is 81%, which is sound. The observation result of the cross-section macrostructure of the joining part shows cracks and tunnel pores in the joining tail. No defect was observed and the joint was sound. It should be noted that some burrs at the ends were finished with a grinder, so that the appearance could be sound.

【００５３】比較例 ３ 板厚：４mm、板幅：３００mm、長さ：５０００mm、材
質：６Ｎ０１−Ｔ５のアルミニウム押出型材の２枚を供
試材として、それらを幅方向に突き合せて、テーブル上
に固定した。また、それら供試材の突合せ部における接
合終了側の端部には、凹陥深さ（ｙ）：６mmであり、Ｒ
部の半径：２mmであるＵ字形状の凹所を刳り抜いた、板
厚：４mm（供試材板厚と同じ）、サイズ：５０mm×５０
mmの鋼板（材質：ＳＳ４０）をタブ板として用い、供試
材端面に、図４に示される如く当接せしめた状態におい
て固定した。Comparative Example 3 Two pieces of aluminum extruded material having a plate thickness of 4 mm, a plate width of 300 mm, a length of 5000 mm, and a material of 6N01-T5 were used as test materials, but they were butted against each other in the width direction and placed on the table. Fixed to. Further, at the end of the abutting portion of these test materials on the joining end side, the concave depth (y) is 6 mm, and R
U-shaped recess with a radius of 2 mm is hollowed out, plate thickness: 4 mm (same as the sample plate thickness), size: 50 mm x 50
A mm steel plate (material: SS40) was used as a tab plate, and was fixed to the end surface of the test material in a state of abutting it as shown in FIG.

【００５４】そして、回転治具として、肩径：１７mm、
ピン長さ：３．９mm、ピン径：４mmのものを用い、回転
数：１５００ｒｐｍ、速度：５００mm／分の接合条件の
下において、摩擦攪拌接合操作を実施した。なお、その
際、回転治具の接合方向後方の端部が、２枚の供試材を
接合してなる接合材と、それに当接せしめたタブ板との
境目から、２mm程タブ板側に進んだところで、回転治具
を引き抜き、摩擦攪拌接合操作を終了せしめた。そし
て、このようにして得られた接合材に付着するタブ板
を、木槌を用いて取り除いたところ、接合材側で割れが
発生してしまい、目的とする用途の製品に使用すること
の出来ないものとなった。As a rotating jig, the shoulder diameter: 17 mm,
A friction stir welding operation was performed under the welding conditions of a rotation speed of 1500 rpm and a speed of 500 mm / min using a pin length of 3.9 mm and a pin diameter of 4 mm. At that time, the end of the rotary jig at the rear side in the joining direction is about 2 mm from the boundary between the joining material formed by joining the two test materials and the tab plate brought into contact with it. At the advanced position, the rotary jig was pulled out, and the friction stir welding operation was completed. Then, when the tab plate attached to the bonding material thus obtained was removed using a mallet, cracks occurred on the bonding material side, and it was possible to use it for the product for the intended purpose. It became nothing.

【００５５】実施例 ４ 板厚：３．２mm、板幅：１００mm、長さ：１５０mm、材
質：５４５４−Ｏのアルミニウム板材の２枚を供試材と
して用い、それら供試材を幅方向において突き合せて、
摩擦攪拌接合のためのテーブル上に固定せしめた。ま
た、それら突き合わされた供試材の接合終了側の端部に
は、図６に示されるように、幅（ｚ）：１５mm、凹陥深
さ（ｙ）：２．０mmの矩形形状の凹所が設けられてな
る、板厚：３．２mm（供試材板厚と同じ）、サイズ：５
０mm×５０mmの、供試材と同材質のアルミニウム板材か
らなるタブ板を、その凹所が供試材の突合せ部に対向す
る如くして、供試材端部に当接せしめて、かかる供試材
と同様に、テーブル上に固定せしめた。Example 4 Two aluminum plate materials having a plate thickness of 3.2 mm, a plate width of 100 mm, a length of 150 mm and a material of 5454-O were used as test materials, and the test materials were projected in the width direction. Together,
It was fixed on a table for friction stir welding. Further, as shown in FIG. 6, a rectangular recess having a width (z) of 15 mm and a recess depth (y) of 2.0 mm is formed at the end portion of the butted test materials on the joining end side. Are provided, plate thickness: 3.2 mm (same as the sample material plate thickness), size: 5
A 0 mm x 50 mm tab plate made of the same aluminum material as the test material is brought into contact with the end of the test material with its recess facing the abutting portion of the test material. Like the test material, it was fixed on the table.

【００５６】そして、回転治具として、肩径：１５mm、
ピン長さ：３．０mm、ピン径：４mmのものを用い、回転
数：１５００ｒｐｍ、速度：２５０mm／分の接合条件の
下において、摩擦攪拌接合操作を実施し、回転治具の接
合方向後方側肩部が、接合材とタブ板の境目から２５mm
だけタブ板側に進んだところで、回転治具を引き抜き、
摩擦攪拌接合操作を終了せしめた。As a rotating jig, the shoulder diameter: 15 mm,
Using a pin length: 3.0 mm, pin diameter: 4 mm, friction stir welding operation was performed under the joining conditions of rotation speed: 1500 rpm, speed: 250 mm / min. The shoulder is 25 mm from the boundary between the joining material and the tab plate
Just go to the tab plate side, pull out the rotating jig,
The friction stir welding operation was completed.

【００５７】かくして得られた接合材に付着するタブ板
を木槌を用いて取り除いたところ、接合部の終端部分に
若干のバリが生じた形態において割れ、接合材側には、
何等割れが至るものではなかった。また、かかる接合材
の尾部に対する引張試験の結果、引張強さは２３５ＭＰ
ａで、継手効率は９４％と健全であり、接合部の断面マ
クロ組織の観察結果でも、接合尾部において、亀裂やト
ンネルポアー等の欠陥は無く、健全な接合部であった。
更に、接合終端部における若干のバリはグラインダーで
仕上げることにより、外観上も健全な端面を得ることが
出来た。When the tab plate adhering to the joining material thus obtained was removed with a mallet, it cracked in the form in which some burrs were generated at the end portion of the joining portion, and the joining material side was
There was no crack. In addition, as a result of a tensile test on the tail portion of the bonding material, the tensile strength is 235MP.
In a, the joint efficiency was as good as 94%, and the observation of the cross-sectional macrostructure of the joint showed that the joint tail had no defects such as cracks and tunnel pores, and was a sound joint.
Furthermore, some burr at the end of the joint was finished with a grinder, so that an end face that was sound in appearance could be obtained.

【００５８】比較例 ４ 板厚：４mm、板幅：３００mm、長さ：５０００mm、材
質：６Ｎ０１−Ｔ５のアルミニウム押出型材の２枚を供
試材として、それら供試材を幅方向において突き合せ
て、テーブル上に固定せしめた。また、それら供試材の
接合終了側の端部には、幅（ｚ）：２５mm、凹陥深さ
（ｙ）：３mmの大きさの矩形の凹所を有する、板厚：４
mm（供試材板厚と同じ）、サイズ：５０mm×５０mmの、
供試材と同材質のアルミニウム押出型材からなるタブ板
を当接せしめて、供試材と同様に、テーブル上に固定せ
しめた。また、回転治具として、肩径：１７mm、ピン長
さ：３．９mm、ピン径：４mmのものを用い、回転数：１
５００ｒｐｍ、速度：５００mm／分なる接合条件の下に
おいて、摩擦攪拌接合操作を実施した。そして、かかる
回転治具の接合方向後方側肩部が、接合材とタブ板の境
目から１５mmだけタブ板側に進んだところで、回転治具
を引き抜くことにより、摩擦攪拌接合操作を終了せしめ
た。Comparative Example 4 Two pieces of aluminum extruded mold material having a plate thickness of 4 mm, a plate width of 300 mm, a length of 5000 mm and a material of 6N01-T5 were used as test materials, and the test materials were butted in the width direction. , Fixed on the table. In addition, at the end of the joining end side of these test materials, there is a rectangular recess having a width (z) of 25 mm and a recess depth (y) of 3 mm. Plate thickness: 4
mm (same as the thickness of the test material), size: 50 mm x 50 mm,
A tab plate made of an aluminum extruded mold material of the same material as the test material was brought into contact with and fixed on the table in the same manner as the test material. As the rotating jig, one having a shoulder diameter of 17 mm, a pin length of 3.9 mm and a pin diameter of 4 mm is used, and the number of rotations is 1
Friction stir welding operation was carried out under the welding conditions of 500 rpm and speed: 500 mm / min. The friction stir welding operation was completed by pulling out the rotating jig when the shoulder portion on the rear side of the rotating jig in the joining direction has advanced to the tab plate side by 15 mm from the boundary between the joining material and the tab plate.

【００５９】このようにして得られた接合材にあって
は、その接合端部からのメタルの湧き出しが多く、外観
上健全な接合部ではなかった。更に、接合部の断面マク
ロ組織の観察結果でも、接合頭部において、トンネルポ
アー等の多数の欠陥があることを認めた。In the joining material thus obtained, a large amount of metal spilled out from the joining end portion, and the joining portion was not sound in appearance. Further, the observation of the cross-section macrostructure of the joint also confirmed that there were many defects such as tunnel pores at the joint head.

【００６０】実施例 ５ 板厚：４mm、板幅：３００mm、長さ：５０００mm、材
質：６Ｎ０１−Ｔ５のアルミニウム押出型材の２枚を供
試材として用いて、それらを幅方向において突き合わ
せ、摩擦攪拌接合のためのテーブル上に固定せしめた。
また、それら供試材の接合終了側端部には、図７に示さ
れるように、板厚：４mm、サイズ：５０mm×５０mmの、
供試材と同材質のタブ板を当接せしめて、供試材と同様
に、テーブル上に固定せしめた。Example 5 Two pieces of aluminum extruded material having a plate thickness of 4 mm, a plate width of 300 mm, a length of 5000 mm, and a material of 6N01-T5 were used as test materials, but they were butted in the width direction and friction stirred. It was fixed on the table for joining.
Further, as shown in FIG. 7, at the end portion of the joining end side of these test materials, a plate thickness: 4 mm, a size: 50 mm × 50 mm,
A tab plate made of the same material as the test material was brought into contact with and fixed on the table in the same manner as the test material.

【００６１】また、回転治具としては、肩径：１７mm、
ピン長さ：３．９mm、ピン径：４mmのものを用い、回転
数：１５００ｒｐｍ、速度：５００mm／分の接合条件の
下において、摩擦攪拌接合操作を実施した。なお、回転
治具の回転は、最初は治具上から見て時計回りとした。
そして、回転治具は、２枚の供試材を接合して形成され
る接合材とタブ板の境目からタブ板側に２５mm進んだ位
置で引き抜き、その後、かかる回転治具を反時計回りに
逆回転せしめ、そして、接合材側の接合部で前記境目か
ら１０mm戻った位置に差し込んで、再度の摩擦攪拌接合
をタブ板側に向かって実施し、そして、回転治具がタブ
板上に至り、更に前記境目からタブ板側に２０mm進んだ
位置において引き抜くことにより、摩擦攪拌接合操作を
終了せしめた。As the rotating jig, the shoulder diameter: 17 mm,
A friction stir welding operation was performed under the welding conditions of a rotation speed of 1500 rpm and a speed of 500 mm / min using a pin length of 3.9 mm and a pin diameter of 4 mm. The rotation of the rotating jig was initially clockwise when viewed from above the jig.
Then, the rotary jig is pulled out at a position 25 mm advanced from the boundary between the joint material formed by joining the two test materials and the tab plate to the tab plate side, and then the rotary jig is rotated counterclockwise. Reverse rotation, and insert it at a position 10 mm back from the boundary at the joining part on the joining material side, perform friction stir welding again toward the tab plate side, and the rotating jig reaches the tab plate. The friction stir welding operation was completed by further pulling it out at a position 20 mm further from the boundary to the tab plate side.

【００６２】かくして得られた接合材に付着せるタブ板
を木槌を用いて取り除いたところ、かかる接合材におけ
る接合終端部に若干のバリが生じた形態において割れ、
接合体側には何等の割れも至るものではなかった。ま
た、接合材尾部の引張試験の結果、引張強さは２００Ｍ
Ｐａで、継手効率は８２％と健全であり、更に接合部の
断面マクロ組織の観察結果でも、接合頭部において亀裂
やトンネルポアー等の欠陥は無く、健全な接合部である
ことを認めた。また、そのような接合材における接合端
部の若干のバリは、グラインダーで仕上げることで、外
観上も健全な端面を得ることが出来た。When the tab plate attached to the thus obtained joining material was removed using a mallet, cracking occurred in a form in which a slight burr was generated at the joining end portion of the joining material.
No cracks were found on the bonded body side. Also, as a result of the tensile test of the joining material tail, the tensile strength is 200M.
At Pa, the joint efficiency was 82%, which was sound. Furthermore, the observation of the cross-section macrostructure of the joint confirmed that the joint had no defects such as cracks and tunnel pores, and it was confirmed that the joint was sound. In addition, a slight burr at the joint end of such a joint material was finished with a grinder, so that an end face having a healthy appearance could be obtained.

【００６３】比較例 ５ 板厚：４mm、板幅：３００mm、長さ：５０００mm、材
質：６Ｎ０１−Ｔ５のアルミニウム押出型材の２枚を供
試材として用い、それら供試材を幅方向に突き合せて、
テーブル上に固定した。また、２枚の供試材の接合終了
側の端部には、板厚：４mm、サイズ：５０mm×５０mm
の、供試材と同材質のタブ板を当接せしめて、同様に固
定した。そして、回転治具としては、肩径：１７mm、ピ
ン長さ：３．９mm、ピン径：４mmのものを用い、回転
数：１５００ｒｐｍ、速度：５００mm／分の接合条件下
において、摩擦攪拌接合を行い、供試材の突合せ部に沿
って、回転治具を移動せしめると共に、更に突合せ部か
らタブ板上に至るまで、進行せしめた。なお、回転治具
の回転は、治具上から見て時計回りとした。また、回転
治具は、供試材とタブ板の境目からタブ板側に２５mm進
んだ位置で引き抜き、更にその後、反時計回りに逆回転
せしめ、供試材側の接合部で前記境目から３mm戻った位
置において、回転治具を再度差し込み、タブ板側に再度
の摩擦攪拌接合操作を実施し、タブ板側に２５mm進んだ
位置で引き抜くことにより、摩擦攪拌接合操作を終了せ
しめた。Comparative Example 5 Two pieces of aluminum extruded material having a plate thickness of 4 mm, a plate width of 300 mm, a length of 5000 mm and a material of 6N01-T5 were used as test materials, and the test materials were butted in the width direction. hand,
Fixed on the table. In addition, at the end of the two test materials on the joining end side, plate thickness: 4 mm, size: 50 mm x 50 mm
Then, a tab plate made of the same material as the test material was brought into contact with and fixed in the same manner. As the rotating jig, one having a shoulder diameter of 17 mm, a pin length of 3.9 mm and a pin diameter of 4 mm was used, and friction stir welding was performed under the welding conditions of a rotation speed of 1500 rpm and a speed of 500 mm / min. Then, the rotating jig was moved along the abutting portion of the test material, and further advanced from the abutting portion to the tab plate. The rotation of the rotating jig was clockwise when viewed from above the jig. In addition, pull out the rotating jig at a position 25 mm ahead of the boundary between the sample and the tab plate toward the tab plate side, and then reversely rotate counterclockwise, and 3 mm from the boundary at the joint on the sample material side. At the returned position, the rotary jig was inserted again, the friction stir welding operation was performed again on the tab plate side, and the friction stir welding operation was terminated by pulling it out at a position advanced 25 mm toward the tab plate side.

【００６４】かくして得られた接合材に付着するタブ板
を、木槌を用いて、実施例４と同様に取り除いたとこ
ろ、接合材側で割れが発生してしまい、目的とする用途
の製品として使用することの出来ないものとなった。The tab plate adhering to the thus obtained joining material was removed in the same manner as in Example 4 using a mallet. As a result, cracks occurred on the joining material side, and the product was used for the intended purpose. It became impossible to use.

【００６５】[0065]

【発明の効果】以上の説明から明らかなように、本発明
に従う摩擦攪拌接合手法によれば、接合開始端部や接合
終了端部において健全な接合部端面が、タブ板の効果的
な使用によって、簡単に実現されることとなったのであ
り、また、そのようなタブ板の接合材からの取り外し
も、簡単に且つ容易に行われ得るのであり、しかも、タ
ブ板の取除き作業に基づくところの接合端部における欠
陥の発生も、効果的に抑制乃至は防止せしめられ得て、
品質の良好な接合材を有利に得ることが出来るのであ
る。As is apparent from the above description, according to the friction stir welding method according to the present invention, a sound joint end surface is obtained at the welding start end and welding end end by the effective use of the tab plate. Since it can be easily realized, and the removal of the tab plate from the joining material can be easily and easily performed, and the tab plate removing operation is performed. The occurrence of defects at the joint ends of can also be effectively suppressed or prevented,
A good quality bonding material can be obtained advantageously.

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

【図１】従来の摩擦攪拌接合方法を示す説明図である。FIG. 1 is an explanatory diagram showing a conventional friction stir welding method.

【図２】本発明に従う摩擦攪拌接合方法の一つの形態を
示す説明図である。FIG. 2 is an explanatory view showing one mode of a friction stir welding method according to the present invention.

【図３】本発明に従う摩擦攪拌接合方法において、接合
されるべき二つの板状部材の突合せ部に差し込まれた回
転治具のピンの位置を示す説明図であって、（ａ）及び
（ｂ）はそれぞれピン先端部の形状の異なる例を示す断
面説明図である。FIG. 3 is an explanatory view showing the positions of the pins of the rotary jig inserted into the abutting portions of the two plate-like members to be joined in the friction stir welding method according to the present invention, and FIGS. [Fig. 4] is a cross-sectional explanatory view showing an example in which the shape of the pin tip portion is different.

【図４】本発明に従う摩擦攪拌接合方法の一つの形態た
る接合終了端側の状態を示す説明図である。FIG. 4 is an explanatory view showing a state at the joining end side, which is one form of the friction stir welding method according to the present invention.

【図５】本発明に従う摩擦攪拌接合方法における接合終
了端側の板状部材とタブ板との当接形態を示す平面説明
図であり、（ａ）及び（ｂ）は、それぞれ、タブ板に設
けられた凹所の異なる形態を示す説明図である。FIG. 5 is an explanatory plan view showing a form of contact between the plate member and the tab plate on the joining end side in the friction stir welding method according to the present invention, and (a) and (b) respectively show the tab plate. It is explanatory drawing which shows the different form of the provided recessed part.

【図６】図５に示されるタブ板とは異なる形状の凹所を
有するタブ板を用い、それを二つの板状部材の接合終了
端側の端面に当接した形態を示す平面説明図である。6 is an explanatory plan view showing a mode in which a tab plate having a recess different in shape from the tab plate shown in FIG. 5 is used, and the tab plate is brought into contact with the end faces of the two plate-shaped members on the side where the joining ends. is there.

【図７】本発明に従う摩擦攪拌接合方法の更に他の例を
部分平面形態図として示す工程説明図である。FIG. 7 is a process explanatory view showing still another example of the friction stir welding method according to the present invention as a partial plan view.

【図８】本発明に従う摩擦攪拌接合方法により得られた
接合材からタブ板を取り除き、その接合端部の処理の例
を示す部分平面説明図である。FIG. 8 is a partial plan view showing an example of treatment of a joining end portion of a joining material obtained by the friction stir welding method according to the present invention, the tab plate being removed.

【符号の説明】[Explanation of symbols]

２ 板状部材 ４ ピン ６ 回転治具 ８ 突合せ部 １０ 接合部 ２０，３０，４０ タブ板 ３２ 凹所 2 plate-shaped members 4 pin 6 rotating jig 8 Butt 10 joints 20, 30, 40 tab plate 32 recess

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 接合されるべき二つの板状部材を突き合
わせ、その突合せ部に対して、ロッド状の回転治具の先
端に同心的に設けたピンを、該回転治具と共に一体に回
転させつつ差し込み、相対的に移動させることにより、
かかる突合せ部を摩擦攪拌接合せしめるに際し、 該二つの板状部材における、前記突合せ部の接合開始端
側の端面に対して、それら板状部材よりも硬質の若しく
は同様な硬さのタブ板を当接せしめる一方、かかる接合
開始時における回転治具のピンの差込位置が、前記接合
開始端側の板状部材端面と前記ピンの先端部における最
先端位置との間の距離が３mm以下となるようにして、か
かる摩擦攪拌接合操作を開始するようにしたことを特徴
とする摩擦攪拌接合方法。1. A plate-shaped member to be joined is butted, and a pin concentrically provided at the tip of a rod-shaped rotary jig is rotated together with the butted portion together with the rotary jig. While inserting while moving relatively,
When the abutting portions are friction stir welded, a tab plate that is harder than the plate members or has a similar hardness to the end faces of the two abutting portions on the welding start end side of the abutting portions. On the other hand, when the pins are inserted into the rotary jig at the start of the joining, the distance between the end face of the plate-like member on the joining start end side and the tip end of the pin is 3 mm or less. Thus, the friction stir welding method is characterized in that the friction stir welding operation is started. 【請求項２】 接合されるべき二つの板状部材を突き合
わせ、その突合せ部に対して、ロッド状の回転治具の先
端に同心的に設けたピンを、該回転治具と共に一体に回
転させつつ差し込み、相対的に移動させることにより、
かかる突合せ部を摩擦攪拌接合せしめるに際し、 該二つの板状部材における、前記突合せ部の接合終端側
の端面に対して、それら板状部材よりも硬質の若しくは
同様な硬さのタブ板を当接せしめると共に、該タブ板の
前記突合せ部に対向する部位に、前記ピンの半径以上、
前記回転治具の半径以下の凹陥深さを有する半円形乃至
はＵ字形の凹所を設け、前記回転治具が前記突合せ部か
ら該凹所を経て該タブ板に達した後、摩擦攪拌接合操作
が終了せしめられるようにしたことを特徴とする摩擦攪
拌接合方法。2. A plate-shaped member to be joined is abutted, and a pin concentrically provided at the tip of a rod-shaped rotating jig is rotated integrally with the abutting portion together with the rotating jig. While inserting while moving relatively,
When performing friction stir welding of such a butt portion, a tab plate having a hardness or a hardness similar to those of the plate members is brought into contact with the end surface of the two plate members on the joining end side of the butt portion. And the radius of the pin is equal to or greater than the radius of the pin at a portion of the tab plate facing the abutting portion.
A semicircular or U-shaped recess having a recess depth equal to or less than the radius of the rotating jig is provided, and after the rotating jig reaches the tab plate from the abutting portion through the recess, friction stir welding is performed. A friction stir welding method characterized in that the operation is completed. 【請求項３】 接合されるべき二つの板状部材を突き合
わせ、その突合せ部に対して、ロッド状の回転治具の先
端に同心的に設けたピンを、該回転治具と共に一体に回
転させつつ差し込み、相対的に移動させることにより、
かかる突合せ部を摩擦攪拌接合せしめるに際し、 該二つの板状部材における、前記突合せ部の接合終端側
の端面に対して、それら板状部材よりも硬質の若しくは
同様な硬さのタブ板を当接せしめると共に、該タブ板の
前記突合せ部に対向する部位に、前記ピンの直径以上、
前記回転治具の直径以下の幅と、前記ピンの半径以上、
前記回転治具の半径以下の凹陥深さを有する矩形の凹所
を設け、前記回転治具が前記突合せ部から該凹所を経て
該タブ板に達した後、摩擦攪拌接合操作が終了せしめら
れるようにしたことを特徴とする摩擦攪拌接合方法。3. Two plate-shaped members to be joined are butted against each other, and a pin concentrically provided at the tip of a rod-shaped rotary jig is rotated integrally with the butted part together with the rotary jig. While inserting while moving relatively,
When performing friction stir welding of such a butt portion, a tab plate having a hardness or a hardness similar to those of the plate members is brought into contact with the end surface of the two plate members on the joining end side of the butt portion. At the same time as the tab plate, at a portion of the tab plate facing the abutting portion, at least the diameter of the pin,
Width less than the diameter of the rotating jig and more than the radius of the pin,
A rectangular recess having a recess depth equal to or less than the radius of the rotating jig is provided, and after the rotating jig reaches the tab plate from the abutting portion through the recess, the friction stir welding operation is finished. A friction stir welding method characterized by the above. 【請求項４】 接合されるべき二つの板状部材を突き合
わせ、その突合せ部に対して、ロッド状の回転治具の先
端に同心的に設けたピンを、該回転治具と共に一体に回
転させつつ差し込み、相対的に移動させることにより、
かかる突合せ部を摩擦攪拌接合せしめるに際し、 該二つの板状部材における、前記突合せ部の接合終端側
の端面に対して、それら板状部材と同様な硬さの材質の
タブ板を当接せしめ、その状態において、前記回転治具
が前記突合せ部から該タブ板に達するまで、摩擦攪拌接
合操作を実施した後、該回転治具を形成された接合部か
ら引き抜き、そして該回転治具の回転方向を逆方向とし
た後、該接合部の、前記突合せ部の接合終端面位置から
前記突合せ部の接合開始端側に５mm以上の距離をもって
該回転治具が位置するような部位に、該逆方向回転の回
転治具のピンを差し込み、前記タブ板に達するように再
度の摩擦攪拌接合操作を実施し、該回転治具の後方肩部
が前記板状部材と前記タブ板との境界を通り過ぎるま
で、かかる摩擦攪拌接合操作を継続せしめることを特徴
とする摩擦攪拌接合方法。4. Two plate-shaped members to be joined are butted against each other, and a pin concentrically provided at the tip of the rod-shaped rotary jig is rotated integrally with the butted part together with the rotary jig. While inserting while moving relatively,
When performing friction stir welding of the butt portions, a tab plate made of a material having the same hardness as those of the plate members is brought into contact with the end surfaces of the two plate members on the joining end side of the butt portions, In that state, after performing the friction stir welding operation until the rotary jig reaches the tab plate from the abutting portion, the rotary jig is pulled out from the formed joint portion, and the rotating direction of the rotary jig In the reverse direction, and then in the reverse direction at a portion of the joint where the rotary jig is located at a distance of 5 mm or more from the joint end face position of the butt joint to the joint start end side of the butt joint. Insert the pin of the rotating jig for rotation and perform the friction stir welding operation again to reach the tab plate, until the rear shoulder of the rotating jig passes the boundary between the plate member and the tab plate. , Such friction stir welding operation Friction stir welding method characterized by allowed to continue. 【請求項５】 前記摩擦攪拌接合操作が終了せしめられ
た後、前記二つの板状部材の接合体から前記タブ板が取
り除かれ、そして該接合体の接合部端面で突出するメタ
ルが、グラインダー等の切削機にて除去される請求項１
乃至請求項４記載の摩擦攪拌接合方法。5. After the friction stir welding operation is completed, the tab plate is removed from the joined body of the two plate-shaped members, and the metal protruding at the end face of the joined portion of the joined body is a grinder or the like. 1. It is removed by a cutting machine according to claim 1.
To the friction stir welding method according to claim 4.