JP7127614B2 - Joining method - Google Patents

Joining method Download PDF

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JP7127614B2
JP7127614B2 JP2019102468A JP2019102468A JP7127614B2 JP 7127614 B2 JP7127614 B2 JP 7127614B2 JP 2019102468 A JP2019102468 A JP 2019102468A JP 2019102468 A JP2019102468 A JP 2019102468A JP 7127614 B2 JP7127614 B2 JP 7127614B2
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metal member
auxiliary member
metal
auxiliary
stirring pin
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JP2020196022A (en
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伸城 瀬尾
恵太 及川
諒 吉田
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Nippon Light Metal Co Ltd
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Nippon Light Metal Co Ltd
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Priority to JP2019102468A priority Critical patent/JP7127614B2/en
Application filed by Nippon Light Metal Co Ltd filed Critical Nippon Light Metal Co Ltd
Priority to CN202310739454.XA priority patent/CN116551154A/en
Priority to EP19924022.7A priority patent/EP3954491B1/en
Priority to CN201980093312.2A priority patent/CN113508001A/en
Priority to KR1020217019624A priority patent/KR102540195B1/en
Priority to PCT/JP2019/050708 priority patent/WO2020208879A1/en
Priority to US17/602,945 priority patent/US20220161354A1/en
Publication of JP2020196022A publication Critical patent/JP2020196022A/en
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Description

本発明は、接合方法に関する。 The present invention relates to a joining method.

例えば、特許文献１には、一対の板状の金属部材を、回転ツールを用いて摩擦攪拌接合する発明が開示されている。当該発明では、一対の金属部材の間に金属部材よりも軟質の補助部材を介設し、当該補助部材に回転ツールを挿入して摩擦攪拌を行うというものである。硬度の高い金属部材同士を摩擦攪拌接合すると、回転ツールの損傷が激しく、工具コストが増加するという問題がある。しかし、当該発明によれば、軟質の補助部材に回転ツールを挿入して摩擦攪拌を行うため、硬度の高い金属部材同士を好適に接合することができる。 For example, Patent Literature 1 discloses an invention in which a pair of plate-like metal members are friction stir welded using a rotating tool. In the invention, an auxiliary member softer than the metal member is interposed between a pair of metal members, and a rotary tool is inserted into the auxiliary member to perform friction stir. When metal members having high hardness are friction stir welded together, there is a problem that the rotary tool is severely damaged and the tool cost increases. However, according to the invention, since friction stir is performed by inserting a rotating tool into a soft auxiliary member, it is possible to suitably join metal members with high hardness.

特開２００７－８３２４２号公報JP-A-2007-83242

従来の接合方法では、回転ツールの攪拌ピンが円柱状を呈するため、補助部材への挿入が困難となるという問題があった。また、回転ツールのショルダ部を金属部材に接触させた状態で摩擦攪拌を行うため、摩擦攪拌装置に作用する負荷が大きくなるという問題があった。 In the conventional joining method, since the stirring pin of the rotating tool has a cylindrical shape, there is a problem that it is difficult to insert it into the auxiliary member. Moreover, since the friction stir is performed while the shoulder portion of the rotary tool is in contact with the metal member, there is a problem that the load acting on the friction stir device increases.

このような観点から、本発明は、硬度が高い金属部材同士を好適に接合することができる接合方法を提供することを課題とする。 From such a point of view, an object of the present invention is to provide a joining method capable of suitably joining metal members having high hardness.

前記課題を解決するために、本発明は、先細りの攪拌ピンを備えた回転ツールを用いて一対の金属部材を接合する接合方法であって、アルミニウム合金から形成された第一金属部材と、アルミニウム合金から形成された第二金属部材と、前記第一金属部材及び前記第二金属部材よりも硬度が低いアルミニウム又はアルミニウム合金から形成された断面矩形の補助部材を準備する準備工程と、前記第一金属部材と前記第二金属部材の端部同士を向い合せて、前記端部同士の隙間に前記補助部材を挟み込み、前記第一金属部材の端面と前記補助部材の一方の側面とを突き合わせるとともに、前記第二金属部材の端面と前記補助部材の他方の側面とを突き合せて突合せ部を形成する突合せ工程と、回転する前記回転ツールを前記補助部材の表面側から挿入するとともに、前記攪拌ピンのみを前記補助部材に接触させ前記攪拌ピンの基端側を露出させつつ、前記攪拌ピンの少なくとも基端側の外周面を前記第一金属部材及び前記第二金属部材に接触させた状態で、前記突合せ部に沿って前記回転ツールを相対移動させて前記第一金属部材と前記第二金属部材とを補助部材を介して接合する接合工程と、を含むことを特徴とする。 In order to solve the above problems, the present invention provides a joining method for joining a pair of metal members using a rotary tool having a tapered stirring pin, comprising: a first metal member made of an aluminum alloy; a preparation step of preparing a second metal member made of an alloy and an auxiliary member having a rectangular cross section made of aluminum or an aluminum alloy having a hardness lower than that of the first metal member and the second metal member; The ends of the metal member and the second metal member face each other, the auxiliary member is sandwiched between the ends, and the end surface of the first metal member and one side surface of the auxiliary member are butted against each other. , abutting step of butting the end surface of the second metal member and the other side surface of the auxiliary member to form a butting portion, inserting the rotating tool from the surface side of the auxiliary member and inserting the stirring pin While the base end side of the stirring pin is exposed by bringing the tip into contact with the auxiliary member, at least the outer peripheral surface of the base end side of the stirring pin is in contact with the first metal member and the second metal member, and a joining step of joining the first metal member and the second metal member via an auxiliary member by relatively moving the rotating tool along the butted portion.

かかる接合方法によれば、先細りの攪拌ピンを備えた回転ツールを用いるため、補助部材に容易に挿入することができる。また、攪拌ピンのみを補助部材に挿入するため、摩擦攪拌装置に作用する負荷を軽減することができる。また、第一金属部材及び第二金属部材よりも軟質の補助部材に回転ツールを挿入するため、回転ツールの寿命を長くすることができる。また、攪拌ピンと第一金属部材及び第二金属部材とを接触させることにより接合強度を高めることができる。 According to such a joining method, since a rotary tool having a tapered stirring pin is used, it can be easily inserted into the auxiliary member. Moreover, since only the stirring pin is inserted into the auxiliary member, the load acting on the friction stirrer can be reduced. Moreover, since the rotary tool is inserted into the auxiliary member which is softer than the first metal member and the second metal member, the service life of the rotary tool can be extended. Also, the bonding strength can be increased by bringing the stirring pin into contact with the first metal member and the second metal member.

また、前記補助部材の裏面側に、浮き防止のための突起部を備え、前記突合せ工程では、前記突起部が前記第一金属部材及び前記第二金属部材の少なくとも一方に係止するように前記第一金属部材と前記第二金属部材とを突き合わせることが好ましい。 Further, a protrusion for preventing floating is provided on the back side of the auxiliary member, and in the matching step, the protrusion is engaged with at least one of the first metal member and the second metal member. It is preferable to butt the first metal member and the second metal member.

かかる接合方法によれば、補助部材の表面側への浮き上りを防ぐことができるため、より好適に接合することができる。 According to such a joining method, it is possible to prevent the auxiliary member from floating toward the surface side, so that the joining can be performed more preferably.

また、本発明は、先細りの攪拌ピンを備えた回転ツールを用いて一対の金属部材を接合する接合方法であって、アルミニウム合金から形成された第一金属部材と、アルミニウム合金から形成された第二金属部材と、前記第一金属部材及び前記第二金属部材よりも硬度が低いアルミニウム又はアルミニウム合金から形成された断面矩形の補助部材を準備する準備工程と、前記第一金属部材の端部と前記第二金属部材の側面とを突き合せて、前記第一金属部材の端部と前記第二金属部材の側面との隙間に前記補助部材を挟み込み、前記第一金属部材の端面と前記補助部材の一方の側面とを突き合せるとともに、前記第二金属部材の側面と前記補助部材の他方の側面とを突き合わせて突合せ部を形成する突合せ工程と、回転する前記回転ツールを前記補助部材の表面側から挿入するとともに、前記攪拌ピンのみを前記補助部材に接触させ前記攪拌ピンの基端側を露出させつつ、前記攪拌ピンの少なくとも基端側の外周面を前記第一金属部材及び前記第二金属部材に接触させた状態で、前記突合せ部に沿って前記回転ツールを相対移動させて前記第一金属部材と前記第二金属部材とを補助部材を介して接合する接合工程と、を含むことを特徴とする。 The present invention also provides a joining method for joining a pair of metal members using a rotating tool having a tapered stirring pin, comprising a first metal member made of an aluminum alloy and a second metal member made of an aluminum alloy. a second metal member; a preparatory step of preparing an auxiliary member having a rectangular cross section made of aluminum or an aluminum alloy having a hardness lower than that of the first metal member and the second metal member; and an end portion of the first metal member. The side surface of the second metal member is abutted, and the auxiliary member is sandwiched between the end of the first metal member and the side surface of the second metal member, and the end surface of the first metal member and the auxiliary member and abutting the side surface of the second metal member and the other side surface of the auxiliary member to form a butting portion; While inserting only the stirring pin into contact with the auxiliary member and exposing the proximal end side of the stirring pin, the outer peripheral surface of at least the proximal side of the stirring pin is covered with the first metal member and the second metal member. and a joining step of joining the first metal member and the second metal member via an auxiliary member by relatively moving the rotating tool along the butted portion while being in contact with the members. Characterized by

かかる接合方法によれば、先細りの攪拌ピンを備えた回転ツールを用いるため、補助部材に容易に挿入することができる。また、攪拌ピンのみを補助部材に挿入するため、摩擦攪拌装置に作用する負荷を軽減することができる。また、第一金属部材及び第二金属部材よりも軟質の補助部材に回転ツールを挿入するため、回転ツールの寿命を長くすることができる。また、攪拌ピンと第一金属部材及び第二金属部材を接触させることにより接合強度を高めることができる。また、第一金属部材と第二金属部材とを垂直に接合することができる。 According to such a joining method, since a rotary tool having a tapered stirring pin is used, it can be easily inserted into the auxiliary member. Moreover, since only the stirring pin is inserted into the auxiliary member, the load acting on the friction stirrer can be reduced. Moreover, since the rotary tool is inserted into the auxiliary member which is softer than the first metal member and the second metal member, the service life of the rotary tool can be extended. Also, the bonding strength can be increased by bringing the stirring pin into contact with the first metal member and the second metal member. Also, the first metal member and the second metal member can be joined vertically.

また、前記補助部材の裏面側に、浮き防止のための突起部を備え、前記突合せ工程では、前記突起部が前記第一金属部材及び前記第二金属部材の少なくとも一方に係止するように前記第一金属部材と前記第二金属部材とを突き合わせるこが好ましい。 Further, a protrusion for preventing floating is provided on the back side of the auxiliary member, and in the matching step, the protrusion is engaged with at least one of the first metal member and the second metal member. It is preferable to butt the first metal member and the second metal member.

かかる接合方法によれば、補助部材の表面側への浮き上りを防ぐことができるため、より好適に接合することができる。 According to such a joining method, it is possible to prevent the auxiliary member from floating toward the surface side, so that the joining can be performed more preferably.

本発明に係る接合方法によれば、硬度が高い金属部材同士を好適に接合することができる。 According to the joining method according to the present invention, it is possible to suitably join metal members having high hardness.

本発明の第一実施形態に係る接合方法の準備工程を示す斜視図である。It is a perspective view which shows the preparatory process of the joining method which concerns on 1st embodiment of this invention. 第一実施形態に係る接合方法の突合せ工程を示す断面図である。It is sectional drawing which shows the butt|matching process of the joining method which concerns on 1st embodiment. 第一実施形態に係る接合方法の接合工程を示す断面図である。It is sectional drawing which shows the joining process of the joining method which concerns on 1st embodiment. 本発明の第二実施形態に係る接合方法の突合せ工程を示す断面図である。It is sectional drawing which shows the butt|matching process of the joining method which concerns on 2nd embodiment of this invention. 本発明の第三実施形態に係る接合方法の準備工程を示す斜視図である。It is a perspective view which shows the preparatory process of the joining method which concerns on 3rd embodiment of this invention. 第三実施形態に係る接合方法の突合せ工程を示す断面図である。It is sectional drawing which shows the butt|matching process of the joining method which concerns on 3rd embodiment. 第三実施形態に係る接合方法の接合工程を示す断面図である。It is sectional drawing which shows the joining process of the joining method which concerns on 3rd embodiment. 本発明の第四実施形態に係る接合方法の準備工程を示す斜視図である。It is a perspective view which shows the preparatory process of the joining method which concerns on 4th embodiment of this invention. 第四実施形態に係る接合方法の突合せ工程を示す断面図である。It is sectional drawing which shows the butt|matching process of the joining method which concerns on 4th embodiment. 第四実施形態に係る接合方法の接合工程を示す断面図である。It is sectional drawing which shows the joining process of the joining method which concerns on 4th embodiment. 本発明の第五実施形態に係る接合方法の準備工程を示す断面図である。It is sectional drawing which shows the preparatory process of the joining method which concerns on 5th embodiment of this invention. 第五実施形態に係る接合方法の突合せ工程を示す断面図である。It is sectional drawing which shows the butt|matching process of the joining method which concerns on 5th embodiment.

［第一実施形態］
本発明の第一実施形態について、適宜図面を参照しながら説明する。第一実施形態に係る接合方法は、準備工程と、突合せ工程と、接合工程とを行う。図１に示すように、本実施形態では、第一金属部材１と第二金属部材２とを摩擦攪拌接合する。以下の説明における「表面」とは、「裏面」の反対側の面を言う。 [First embodiment]
A first embodiment of the present invention will be described with reference to the drawings as appropriate. The bonding method according to the first embodiment includes a preparation process, a matching process, and a bonding process. As shown in FIG. 1, in this embodiment, a first metal member 1 and a second metal member 2 are friction stir welded. "Front surface" in the following description refers to the surface opposite to "back surface".

図１に示すように、準備工程は、第一金属部材１、第二金属部材２及び補助部材１０を用意する工程である。第一金属部材１及び第二金属部材２は、板状の金属部材である。第一金属部材１及び第二金属部材２は、摩擦攪拌可能な金属であれば特に制限されないが、例えば、アルミニウム又はアルミニウム合金を用いる。第一金属部材１及び第二金属部材２は、本実施形態では、ＪＩＳＨ５３０２ ＡＤＣ１２（Ａｌ-Ｓｉ-Ｃｕ系）等のアルミニウム合金鋳造材を用いている。 As shown in FIG. 1, the preparation step is a step of preparing the first metal member 1, the second metal member 2 and the auxiliary member 10. As shown in FIG. The first metal member 1 and the second metal member 2 are plate-shaped metal members. The first metal member 1 and the second metal member 2 are not particularly limited as long as they are metals that can be friction-stirred. For example, aluminum or an aluminum alloy is used. In this embodiment, the first metal member 1 and the second metal member 2 are made of an aluminum alloy cast material such as JISH5302 ADC12 (Al-Si-Cu system).

第一金属部材１は、端部に形成された端面１ａ、表面１ｂ及び裏面１ｃを備えている。端面１ａは、表面１ｂおよび裏面１ｃに対して垂直になっている。第二金属部材２は、端部に形成された端面２ａ、表面２ｂ及び裏面２ｃを備えている。端面２ａは、表面２ｂおよび裏面２ｃに対して垂直になっている。第一金属部材１及び第二金属部材２の板厚は同一である。 The first metal member 1 has an end face 1a, a front face 1b and a back face 1c formed at the ends. The end face 1a is perpendicular to the front face 1b and the back face 1c. The second metal member 2 has an end face 2a, a front face 2b and a back face 2c formed at the end. The end face 2a is perpendicular to the front face 2b and the back face 2c. The plate thicknesses of the first metal member 1 and the second metal member 2 are the same.

補助部材１０は、第一金属部材１と第二金属部材２との間に介設される部材である。補助部材１０は、第一金属部材１よりも硬度の低い金属で形成されている。補助部材１０は、例えば、ＪＩＳ Ａ１０５０，Ａ１１００，Ａ６０６３等のアルミニウム合金展伸材で形成されている。補助部材１０は、断面矩形を呈する長尺の部材にて構成されている。 The auxiliary member 10 is a member interposed between the first metal member 1 and the second metal member 2 . The auxiliary member 10 is made of a metal having a hardness lower than that of the first metal member 1 . The auxiliary member 10 is made of, for example, an aluminum alloy wrought material such as JIS A1050, A1100, A6063. The auxiliary member 10 is composed of a long member having a rectangular cross section.

補助部材１０は、表面１０ａと、側面１０ｂ，１０ｃと、裏面１０ｄを備えている。側面１０ｂ，１０ｃは、表面１０ａおよび裏面１０ｄと垂直になっている。側面１０ｂ，１０ｃは互いに平行になっている。 The auxiliary member 10 has a front surface 10a, side surfaces 10b and 10c, and a rear surface 10d. Sides 10b and 10c are perpendicular to front surface 10a and back surface 10d. Sides 10b and 10c are parallel to each other.

突合せ工程は、図２に示すように、第一金属部材１、第二金属部材２及び補助部材１０を突き合わせつつ架台Ｋに固定する工程である。突合せ工程では、第一金属部材１の端面１ａと、第二金属部材２の端面２ａとの間に補助部材１０を配置する。第一金属部材１の端面１ａと、補助部材１０の側面１０ｂとが概ね面接触するように突き合わされて突合せ部Ｊ１が形成される。第二金属部材２の端面２ａと、補助部材１０の側面１０ｃとが概ね面接触するように突き合わされて突合せ部Ｊ２が形成される。補助部材１０の表面１０ａは、第一金属部材１の表面１ｂ及び第二金属部材２の表面２ｂと面一になる。補助部材１０の裏面１０ｄは、第一金属部材１の裏面１ｃ及び第二金属部材２の裏面２ｃと面一になる。 The butting step is a step of fixing the first metal member 1, the second metal member 2, and the auxiliary member 10 to the base K while butting them against each other, as shown in FIG. In the butting step, the auxiliary member 10 is arranged between the end surface 1 a of the first metal member 1 and the end surface 2 a of the second metal member 2 . The end surface 1a of the first metal member 1 and the side surface 10b of the auxiliary member 10 are butted together so as to be in general surface contact to form a butted portion J1. The end surface 2a of the second metal member 2 and the side surface 10c of the auxiliary member 10 are butted together so as to be in general surface contact to form a butting portion J2. The surface 10 a of the auxiliary member 10 is flush with the surface 1 b of the first metal member 1 and the surface 2 b of the second metal member 2 . The rear surface 10d of the auxiliary member 10 is flush with the rear surface 1c of the first metal member 1 and the rear surface 2c of the second metal member 2. As shown in FIG.

ここで、図２に示すように回転ツールＦは、基部Ｆ１と、攪拌ピンＦ２とで構成されている。回転ツールＦは、例えば、工具鋼で形成されている。基部Ｆ１は、摩擦攪拌装置の回転軸に接続される部位である。攪拌ピンＦ２は、基部Ｆ１から垂下し、先細りとなっている。攪拌ピンＦ２の先端には、回転中心軸に対して直交する平坦面Ｆ３が形成されている。平坦面Ｆ３は、補助部材１０の表面１０ａの幅寸法よりも小さい直寸法で形成されている。攪拌ピンＦ２の上端部の直径寸法は、補助部材１０の表面１０ａの幅寸法よりも大きい。 Here, as shown in FIG. 2, the rotary tool F is composed of a base portion F1 and a stirring pin F2. The rotary tool F is made of tool steel, for example. The base F1 is a part connected to the rotating shaft of the friction stirrer. Stirring pin F2 depends from base F1 and is tapered. A flat surface F3 orthogonal to the central axis of rotation is formed at the tip of the stirring pin F2. The flat surface F3 is formed with a direct dimension smaller than the width dimension of the surface 10a of the auxiliary member 10. As shown in FIG. The diameter dimension of the upper end portion of the stirring pin F2 is larger than the width dimension of the surface 10a of the auxiliary member 10. As shown in FIG.

攪拌ピンＦ２の外周面には、螺旋溝が刻設されている。本実施形態では、回転ツールＦを右回転させるため、基端側から先端側に向かうにつれて螺旋溝が左回りで形成されている。なお、回転ツールＦを左回転させる場合は、基端側から先端側に向かうにつれて螺旋溝が右回りで形成されている。このようにすると、塑性流動化した金属が螺旋溝に導かれて先端側に移動するため、バリの発生を抑制することができる。 A spiral groove is engraved on the outer peripheral surface of the stirring pin F2. In this embodiment, since the rotary tool F is rotated rightward, the spiral groove is formed counterclockwise as it goes from the base end side to the tip end side. When the rotating tool F is rotated counterclockwise, the spiral groove is formed clockwise as it goes from the base end side to the tip end side. In this way, the plastically fluidized metal is guided by the spiral grooves and moves toward the tip side, so that the generation of burrs can be suppressed.

接合工程は、図３に示すように、回転ツールＦを用いて第一金属部材１と第二金属部材２とを摩擦攪拌接合する工程である。接合工程では、右回転させた回転ツールＦの攪拌ピンＦ２を補助部材１０の表面１０ａの幅方向中央に挿入して、補助部材１０の長手方向に沿って相対移動させる。このとき、攪拌ピンＦ２の下端部の外周面は、第一金属部材１の端面１ａ及び第二金属部材２の端面２ａに接触させず、攪拌ピンＦ２の上端部の外周面は、第一金属部材１の端面１ａ及び第二金属部材２の端面２ａに接触させた状態である。攪拌ピンＦ２の上端部の外周面は、第一金属部材１の端面１ａの上端部及び第二金属部材２の端面２ａの上端部とで、上端に向かうに連れて接触代が大きくなるように接触している。 The joining step is a step of friction stir joining the first metal member 1 and the second metal member 2 using a rotary tool F, as shown in FIG. In the joining step, the stirring pin F2 of the rotating tool F rotated to the right is inserted into the center of the surface 10a of the auxiliary member 10 in the width direction, and relatively moved along the longitudinal direction of the auxiliary member 10. As shown in FIG. At this time, the outer peripheral surface of the lower end portion of the stirring pin F2 does not contact the end surface 1a of the first metal member 1 and the end surface 2a of the second metal member 2, and the outer peripheral surface of the upper end portion of the stirring pin F2 does not contact the first metal member. It is in contact with the end surface 1a of the member 1 and the end surface 2a of the second metal member 2. FIG. The outer peripheral surface of the upper end portion of the stirring pin F2 is arranged so that the contact margin between the upper end portion of the end surface 1a of the first metal member 1 and the upper end portion of the end surface 2a of the second metal member 2 increases toward the upper end. in contact.

接合工程では、攪拌ピンＦ２のみを第一金属部材１、第二金属部材２及び補助部材１０に接触させ、攪拌ピンＦ２の基端側は、第一金属部材１及び第二金属部材２から露出した状態で摩擦攪拌を行う。攪拌ピンＦ２の平坦面Ｆ３は、架台Ｋに接触しない範囲で深い位置まで挿入する。回転ツールＦを補助部材１０に沿って相対移動させ、終了位置に達したら回転ツールＦを補助部材１０から離脱させる。以上により、突合せ部Ｊ１，Ｊ２が一の工程で同時に摩擦攪拌接合される。回転ツールＦの移動軌跡には塑性化領域Ｗが形成される。 In the joining step, only the stirring pin F2 is brought into contact with the first metal member 1, the second metal member 2 and the auxiliary member 10, and the base end side of the stirring pin F2 is exposed from the first metal member 1 and the second metal member 2. Friction stir is performed in this state. The flat surface F3 of the agitating pin F2 is inserted to a deep position within a range where it does not come into contact with the base K. The rotating tool F is relatively moved along the auxiliary member 10, and when the end position is reached, the rotating tool F is separated from the auxiliary member 10. - 特許庁As described above, the butted portions J1 and J2 are simultaneously friction stir welded in one step. A plasticized region W is formed in the movement trajectory of the rotating tool F. As shown in FIG.

以上説明した本実施形態に係る接合方法によれば、先細りの攪拌ピンＦ２を備えた回転ツールＦを用いるため、補助部材１０の表面１０ａに容易に挿入することができる。また、攪拌ピンＦ２のみを補助部材１０に挿入し、攪拌ピンＦ２の基端側は露出させた状態で摩擦攪拌するため、摩擦攪拌装置に作用する負荷を軽減することができる。 According to the joining method according to the present embodiment described above, since the rotating tool F having the tapered stirring pin F2 is used, it can be easily inserted into the surface 10a of the auxiliary member 10 . Further, since only the stirring pin F2 is inserted into the auxiliary member 10 and the base end side of the stirring pin F2 is exposed, friction stirring is performed, so that the load acting on the friction stir device can be reduced.

また、第一金属部材１及び第二金属部材２よりも軟質の補助部材１０に回転ツールＦを挿入するため、回転ツールＦの寿命を長くすることができる。また、攪拌ピンＦ２の上端部のみを第一金属部材１及び第二金属部材２と接触させるに留めるため、第一金属部材１及び第二金属部材２の硬質の金属が補助部材１０側に多く混入するのを防ぐことができるため、より接合強度を高めることができる。 Moreover, since the rotary tool F is inserted into the auxiliary member 10 which is softer than the first metal member 1 and the second metal member 2, the life of the rotary tool F can be lengthened. Further, since only the upper end of the stirring pin F2 is kept in contact with the first metal member 1 and the second metal member 2, the hard metal of the first metal member 1 and the second metal member 2 is more on the auxiliary member 10 side. Since contamination can be prevented, the bonding strength can be further increased.

また、攪拌ピンＦ２は先細りの形状であるため、攪拌ピンＦ２と第一金属部材１及び第二金属部材２とが大きく接触するのを防ぐことができる。 Further, since the stirring pin F2 has a tapered shape, it is possible to prevent the stirring pin F2 and the first metal member 1 and the second metal member 2 from coming into large contact with each other.

［第二実施形態］
次に、本発明の第二実施形態に係る接合方法について説明する。図４は、本発明の第二実施形態に係る接合方法の突合せ工程を示す断面図である。第二実施形態に係る接合方法は、準備工程と、突合せ工程と、接合工程とを行う。第二実施形態では、補助部材１０Ａの形状が第一実施形態と主に相違する。本実施形態では、第一実施形態と相違する部分を中心に説明する。 [Second embodiment]
Next, a joining method according to a second embodiment of the present invention will be described. FIG. 4 is a cross-sectional view showing the butting step of the joining method according to the second embodiment of the present invention. The bonding method according to the second embodiment includes a preparation process, a matching process, and a bonding process. The second embodiment mainly differs from the first embodiment in the shape of the auxiliary member 10A. In this embodiment, the description will focus on the parts that are different from the first embodiment.

図４に示すように、第一金属部材１及び第二金属部材２は第一実施形態と同一である。補助部材１０Ａは、断面矩形形状の本体部１１と、本体部１１の裏面（底部）１０ｄから下方に突出する突起部１２を備えている。突起部１２は、本体部１１の裏面（底部）１０ｄよりも幅広となる断面矩形（横長の長方形）状を呈する。突起部１２は、補助部材１０Ａの長手方向の全長に渡って形成されている。なお、突起部１２は、補助部材１０Ａの長手方向に沿って断続的に形成してもよい。架台Ｋには、突起部１２が挿入される断面矩形の凹部Ｋ１が形成されている。 As shown in FIG. 4, the first metal member 1 and the second metal member 2 are the same as in the first embodiment. The auxiliary member 10A includes a main body 11 having a rectangular cross section and a protrusion 12 projecting downward from a rear surface (bottom) 10d of the main body 11. As shown in FIG. The projecting portion 12 has a rectangular cross-section (horizontally long rectangle) that is wider than the back surface (bottom portion) 10 d of the body portion 11 . The projecting portion 12 is formed over the entire longitudinal length of the auxiliary member 10A. The projections 12 may be intermittently formed along the longitudinal direction of the auxiliary member 10A. The base K is formed with a recess K1 having a rectangular cross section into which the projection 12 is inserted.

突合せ工程では、第一金属部材１と、第二金属部材２と、補助部材１０Ａとを突き合わせて架台Ｋに固定する。突合せ工程では、まず、補助部材１０Ａの突起部１２を凹部Ｋ１に挿入する。例えば、架台Ｋの手前側又は奥側の凹部Ｋ１の開口部から突起部１２を挿入する。 In the butting step, the first metal member 1, the second metal member 2, and the auxiliary member 10A are butted and fixed to the frame K. As shown in FIG. In the butting step, first, the protrusion 12 of the auxiliary member 10A is inserted into the recess K1. For example, the protrusion 12 is inserted from the opening of the recess K1 on the front side or the back side of the base K.

次に、第一金属部材１及び第二金属部材２を補助部材１０の両側から突き合わせる。突起部１２は、第一金属部材１の裏面１ｃ及び第二金属部材２の裏面２ｃにそれぞれ係止される。第一金属部材１の端面１ａと、補助部材１０の側面１０ｂとが突き合わされて突合せ部Ｊ１が形成される。第二金属部材２の端面２ａと、補助部材１０の側面１０ｃとが突き合わされて突合せ部Ｊ２が形成される。 Next, the first metal member 1 and the second metal member 2 are butted against each other from both sides of the auxiliary member 10 . The projecting portion 12 is engaged with the rear surface 1c of the first metal member 1 and the rear surface 2c of the second metal member 2, respectively. The end surface 1a of the first metal member 1 and the side surface 10b of the auxiliary member 10 are butted together to form a butt portion J1. The end surface 2a of the second metal member 2 and the side surface 10c of the auxiliary member 10 are butted together to form a butting portion J2.

接合工程では、回転ツールＦを用いて突合せ部Ｊ１，Ｊ２に対して摩擦攪拌接合を行う。本実施形態では、第一実施形態と同じ要領で摩擦攪拌接合を行う。なお、接合工程が終了したら、突起部１２を切除する切除工程を行ってもよいし、突起部１２をそのまま残してもよい。 In the joining step, a rotary tool F is used to perform friction stir welding on the butted portions J1 and J2. In this embodiment, friction stir welding is performed in the same manner as in the first embodiment. It should be noted that, after the joining step is finished, a cutting step of cutting the protrusion 12 may be performed, or the protrusion 12 may be left as it is.

以上説明した第二実施形態によっても第一実施形態と略同等の効果を奏することができる。例えば、摩擦攪拌接合の接合長が長くなると、それに伴って補助部材１０も長く形成する。このような場合に摩擦攪拌接合を行うと、補助部材１０が上方に浮き上がってしまうという問題がある。しかし、第二実施形態によれば、補助部材１０に突起部１２を設けているため、補助部材１０の浮き上がりを防ぐことができる。これにより、第一金属部材１及び第二金属部材２に対する補助部材１０の位置ずれを防ぐことができるため、より好適に摩擦攪拌接合することができる。 Approximately the same effect as the first embodiment can be obtained by the second embodiment described above. For example, when the welding length of friction stir welding becomes longer, the auxiliary member 10 is also formed longer accordingly. If friction stir welding is performed in such a case, there is a problem that the auxiliary member 10 floats upward. However, according to the second embodiment, since the auxiliary member 10 is provided with the protrusion 12, the auxiliary member 10 can be prevented from floating. As a result, displacement of the auxiliary member 10 with respect to the first metal member 1 and the second metal member 2 can be prevented, so friction stir welding can be performed more favorably.

なお、本実施形態では、突起部１２が第一金属部材１及び第二金属部材２の両方に係止するように設定したが、補助部材１０Ａが浮き上がらないように、第一金属部材１及び第二金属部材２のいずれか一方に係止させるようにしてもよい。 In this embodiment, the protruding portion 12 is set to engage with both the first metal member 1 and the second metal member 2. Either one of the two metal members 2 may be engaged.

［第三実施形態］
次に、本発明の第三実施形態に係る接合方法について説明する。図５は、本発明の第三実施形態に係る接合方法の準備工程を示す斜視図である。第三実施形態では、図５に示すように、第一金属部材１Ｂと第二金属部材２Ｂとを直交させて接合する点で他の実施形態と相違する。 [Third embodiment]
Next, a joining method according to a third embodiment of the present invention will be described. FIG. 5 is a perspective view showing a preparatory step of the joining method according to the third embodiment of the present invention. As shown in FIG. 5, the third embodiment differs from the other embodiments in that the first metal member 1B and the second metal member 2B are orthogonally joined to each other.

第三実施形態に係る接合方法では、準備工程と、突合せ工程と、接合工程とを行う。準備工程では、第一金属部材１Ｂ、第二金属部材２Ｂ及び補助部材１０Ｂを用意する。第一金属部材１Ｂは、板状を呈し、端面１Ｂａ、側面１Ｂｂ，１Ｂｃを備えている。側面１Ｂｂ，１Ｂｃは上下方向に広がり、端面１Ｂａは、側面１Ｂｂ，１Ｂｃに対して垂直になっている。第二金属部材２Ｂは、板状を呈し、端面２Ｂａ、側面２Ｂｂ，２Ｂｃ（図５中、上下の面）を備えている。端面２Ｂａは上下方向に広がり、側面２Ｂｂ，２Ｂｃは水平になっている。第一金属部材１Ｂと第二金属部材２ＢとはＬ字状に突き合わされる。 In the bonding method according to the third embodiment, a preparation process, a matching process, and a bonding process are performed. In the preparation step, the first metal member 1B, the second metal member 2B and the auxiliary member 10B are prepared. The first metal member 1B has a plate shape and has an end surface 1Ba and side surfaces 1Bb and 1Bc. The side surfaces 1Bb and 1Bc extend vertically, and the end surface 1Ba is perpendicular to the side surfaces 1Bb and 1Bc. The second metal member 2B has a plate shape and includes an end surface 2Ba and side surfaces 2Bb and 2Bc (upper and lower surfaces in FIG. 5). The end surface 2Ba extends vertically, and the side surfaces 2Bb and 2Bc are horizontal. The first metal member 1B and the second metal member 2B are butted together in an L-shape.

補助部材１０Ｂは、断面矩形形状の本体部１１Ｂと、本体部１１Ｂの裏面（Ｌ字の入隅（内隅）側の面）１０Ｂｄから上方に突出する突起部１２Ｂとを備えている。本体部１１Ｂは、表面１０Ｂａ、側面１０Ｂｂ，１０Ｂｃ（図５中、上下の面）及び裏面１０Ｂｄを備えている。突起部１２Ｂは、本体部１１の裏面１０Ｂｄよりも上方に幅広となる断面矩形（縦長の長方形）状を呈する。突起部１２は、補助部材１０Ｂの長手方向の全長に渡って形成されている。なお、突起部１２は、補助部材１０Ａの長手方向に沿って断続的に形成してもよい。 The auxiliary member 10B includes a body portion 11B having a rectangular cross section and a projection portion 12B projecting upward from a back surface (a surface on the side of an internal corner (inner corner) of the L shape) 10Bd of the body portion 11B. The body portion 11B includes a front surface 10Ba, side surfaces 10Bb and 10Bc (upper and lower surfaces in FIG. 5), and a rear surface 10Bd. The projecting portion 12B has a rectangular cross-sectional shape (longitudinal rectangle) that is wider upward than the back surface 10Bd of the main body portion 11 . The projecting portion 12 is formed over the entire longitudinal length of the auxiliary member 10B. The projections 12 may be intermittently formed along the longitudinal direction of the auxiliary member 10A.

突合せ工程は、図６に示すように、第一金属部材１Ｂと第二金属部材２Ｂとの間に補助部材１０Ｂを介設し、第一金属部材１Ｂと第二金属部材２Ｂとを垂直（Ｌ字状）に突き合わせる工程である。本実施形態では、第一金属部材１Ｂ及び第二金属部材２Ｂの入隅（内隅）側に架台Ｋ２を配置して、両者を付き合わせる。架台Ｋ２には、突起部１２Ｂが挿入される断面矩形の凹部Ｋ２ａが形成されている。凹部Ｋ２ａは、補助部材１０Ｂの長手方向に延設されている。突合せ工程では、まず、補助部材１０Ａの突起部１２を凹部Ｋ２ａに挿入する。 In the butting step, as shown in FIG. 6, an auxiliary member 10B is interposed between the first metal member 1B and the second metal member 2B, and the first metal member 1B and the second metal member 2B are perpendicular (L It is a step of matching the character shape). In the present embodiment, the mount K2 is arranged at the inside corner (inner corner) side of the first metal member 1B and the second metal member 2B, and the two are butted together. A recess K2a having a rectangular cross section into which the protrusion 12B is inserted is formed in the base K2. The recess K2a extends in the longitudinal direction of the auxiliary member 10B. In the matching step, first, the protrusion 12 of the auxiliary member 10A is inserted into the recess K2a.

次に、第一金属部材１及び第二金属部材２を補助部材１０の両側からＬ字状に突き合わせる。突起部１２Ｂは、第一金属部材１の側面１Ｂｂに係止される。第一金属部材１Ｂの端面１Ｂａと、補助部材１０Ｂの側面１０Ｂｂとが突き合わされて突合せ部Ｊ３が形成される。第二金属部材２Ｂの側面２Ｂｂと補助部材１０Ｂの側面１０Ｂｃとが突き合わされて突合せ部Ｊ４が形成される。第一金属部材１Ｂと第二金属部材２Ｂとは垂直になっている。 Next, the first metal member 1 and the second metal member 2 are butted together from both sides of the auxiliary member 10 in an L-shape. The protrusion 12B is locked to the side surface 1Bb of the first metal member 1. As shown in FIG. The end surface 1Ba of the first metal member 1B and the side surface 10Bb of the auxiliary member 10B are butted together to form a butt portion J3. A side surface 2Bb of the second metal member 2B and a side surface 10Bc of the auxiliary member 10B are butted to form a butt portion J4. The first metal member 1B and the second metal member 2B are perpendicular.

接合工程は、図６及び図７に示すように、回転ツールＦを用いて突合せ部Ｊ３，Ｊ４を摩擦攪拌接合する工程である。接合工程では、回転ツールＦの攪拌ピンＦ２のみを補助部材１０Ｂの表面１０Ｂａに挿入し、攪拌ピンＦ２の基端側の一部を露出させた状態で補助部材１０Ｂに沿って相対移動させて突合せ部Ｊ３，Ｊ４に対して摩擦攪拌接合を行う。 The joining step is, as shown in FIGS. 6 and 7, a step of friction stir joining the butted portions J3 and J4 using a rotating tool F. FIG. In the joining step, only the stirring pin F2 of the rotating tool F is inserted into the surface 10Ba of the auxiliary member 10B, and the base end side of the stirring pin F2 is partially exposed and relatively moved along the auxiliary member 10B for butting. Friction stir welding is performed on the portions J3 and J4.

また、本実施形態では、攪拌ピンＦ２の回転中心軸Ｚを水平にしつつ、攪拌ピンＦ２を補助部材１０Ｂの表面１０ａＢの幅方向中央に挿入して、補助部材１０Ｂの長手方向に沿って相対移動させる。このとき、攪拌ピンＦ２の先端部の外周面は、第一金属部材１Ｂの端面１Ｂａ及び第二金属部材２の側面２Ｂｂに接触させず、攪拌ピンＦ２の基端部の外周面は、第一金属部材１Ｂの端面１Ｂａ及び第二金属部材２Ｂの側面２Ｂｂに接触させた状態となっている。攪拌ピンＦ２の基端部の外周面は、第一金属部材１Ｂの端面１Ｂａ及び第二金属部材２Ｂの側面２Ｂｂとで、基端側に向かうに連れて接触代が大きくなるように接触している。 Further, in the present embodiment, while the rotation center axis Z of the stirring pin F2 is horizontal, the stirring pin F2 is inserted into the center of the width direction of the surface 10aB of the auxiliary member 10B, and relatively moved along the longitudinal direction of the auxiliary member 10B. Let At this time, the outer peripheral surface of the tip of the stirring pin F2 does not contact the end surface 1Ba of the first metal member 1B and the side surface 2Bb of the second metal member 2, and the outer peripheral surface of the base end of the stirring pin F2 does not contact the first metal member 1B. It is in contact with the end surface 1Ba of the metal member 1B and the side surface 2Bb of the second metal member 2B. The outer peripheral surface of the base end portion of the stirring pin F2 is in contact with the end surface 1Ba of the first metal member 1B and the side surface 2Bb of the second metal member 2B so that the contact margin increases toward the base end side. there is

接合工程では、攪拌ピンＦ２のみを第一金属部材１Ｂ、第二金属部材２Ｂ及び補助部材１０Ｂに接触させ、攪拌ピンＦ２の基端側は、第一金属部材１Ｂ及び第二金属部材２Ｂから露出した状態で摩擦攪拌を行う。攪拌ピンＦ２の平坦面Ｆ３は、架台Ｋ２に接触しない範囲で深い位置まで挿入する。回転ツールＦを補助部材１０Ｂに沿って相対移動させ、終了位置に達したら回転ツールＦを補助部材１０から離脱させる。以上により、突合せ部Ｊ３，Ｊ４が一の工程で同時に摩擦攪拌接合される。回転ツールＦの移動軌跡には塑性化領域Ｗが形成される。なお、接合工程が終了したら、突起部１２Ｂを切除する切除工程を行ってもよいし、突起部１２Ｂをそのまま残してもよい。また、本実施形態において、突起部１２Ｂを省略した補助部材を用いてもよい。 In the joining step, only the stirring pin F2 is brought into contact with the first metal member 1B, the second metal member 2B and the auxiliary member 10B, and the base end side of the stirring pin F2 is exposed from the first metal member 1B and the second metal member 2B. Friction stir is performed in this state. The flat surface F3 of the stirring pin F2 is inserted to a deep position within a range not to contact the base K2. The rotary tool F is relatively moved along the auxiliary member 10B, and when the end position is reached, the rotary tool F is separated from the auxiliary member 10B. As described above, the butted portions J3 and J4 are simultaneously friction stir welded in one step. A plasticized region W is formed in the movement trajectory of the rotating tool F. As shown in FIG. It should be noted that, after the joining step is completed, a cutting step of cutting the protrusion 12B may be performed, or the protrusion 12B may be left as it is. Further, in the present embodiment, an auxiliary member that does not include the protrusion 12B may be used.

以上説明した第三実施形態に係る接合方法によっても、第一実施形態と略同等の効果を得ることができる。また、本実施形態では、第一金属部材１Ｂと、第二金属部材２Ｂとを垂直に接合することができる。さらに、補助部材１０Ｂの浮き上がりを防ぐことができるので、第一金属部材１Ｂ及び第二金属部材２Ｂに対する補助部材１０Ｂの位置ずれを防ぐことができるため、より好適に摩擦攪拌接合することができる。 By the joining method according to the third embodiment described above, substantially the same effects as those of the first embodiment can be obtained. Moreover, in this embodiment, the first metal member 1B and the second metal member 2B can be joined vertically. Furthermore, since it is possible to prevent the auxiliary member 10B from floating, it is possible to prevent the positional deviation of the auxiliary member 10B with respect to the first metal member 1B and the second metal member 2B, so that friction stir welding can be performed more preferably.

［第四実施形態］
次に、本発明の第四実施形態に係る接合方法について説明する。図８は、本発明の第四実施形態に係る接合方法の準備工程を示す斜視図である。第四実施形態では、図８に示すように、第一金属部材１Ｃと第二金属部材２Ｃとを重ね合わせつつ突き合わせる点で他の実施形態と相違する。 [Fourth embodiment]
Next, a joining method according to a fourth embodiment of the present invention will be described. FIG. 8 is a perspective view showing a preparatory step of a joining method according to a fourth embodiment of the present invention. As shown in FIG. 8, the fourth embodiment differs from the other embodiments in that the first metal member 1C and the second metal member 2C are overlapped and butted against each other.

第四実施形態に係る接合方法では、準備工程と、突合せ工程と、接合工程とを行う。準備工程では、第一金属部材１Ｃ、第二金属部材２Ｃ及び補助部材１０Ｃを用意する。第一金属部材１Ｃは、板状を呈し、端面１Ｃａ、表面１Ｃｂ及び裏面１Ｃｃを備えている。端面１Ｃａは、表面１Ｃｂ及び裏面１Ｃｃに対して垂直になっている。 In the bonding method according to the fourth embodiment, a preparation process, a matching process, and a bonding process are performed. In the preparation step, the first metal member 1C, the second metal member 2C and the auxiliary member 10C are prepared. The first metal member 1C has a plate shape and includes an end face 1Ca, a front face 1Cb and a back face 1Cc. The end face 1Ca is perpendicular to the front face 1Cb and the back face 1Cc.

第二金属部材２Ｃは、板厚部と板薄部からなる段差部を備えた形状になっている。第二金属部材２Ｃは、第一端面２Ｃａ、第一表面２Ｃｂ、第二端面２Ｃｃ、第二表面２Ｃｄ及び裏面２Ｃｅとを有する。第一端面２Ｃａは、第一表面２Ｃｂに対して垂直になっている。第二端面２Ｃｃは、第二表面２Ｃｄ及び裏面２Ｃｅに対して垂直になっている。 The second metal member 2C has a shape having a stepped portion composed of a thick plate portion and a thin plate portion. The second metal member 2C has a first end surface 2Ca, a first surface 2Cb, a second end surface 2Cc, a second surface 2Cd and a back surface 2Ce. The first end surface 2Ca is perpendicular to the first surface 2Cb. The second end surface 2Cc is perpendicular to the second surface 2Cd and the back surface 2Ce.

補助部材１０Ｃは、断面矩形の長尺の部材にて構成されている。補助部材１０Ｃは、表面１０Ｃａと、側面１０Ｃｂ，１０Ｃｃと、裏面１０Ｃｄを備えている。側面１０Ｃｂ，１０Ｃｃは、表面１０Ｃａおよび裏面１０Ｃｄと垂直になっている。側面１０Ｃｂ，１０Ｃｃは互いに平行になっている。 The auxiliary member 10C is composed of an elongated member having a rectangular cross section. The auxiliary member 10C has a front surface 10Ca, side surfaces 10Cb and 10Cc, and a rear surface 10Cd. The side surfaces 10Cb and 10Cc are perpendicular to the front surface 10Ca and the rear surface 10Cd. The side surfaces 10Cb and 10Cc are parallel to each other.

突合せ工程は、図９に示すように、第一金属部材１Ｃと第二金属部材２Ｃとを重ね合わせつつ、補助部材１０Ｃを介設して突き合わせる工程である。突合せ工程では、第一金属部材１Ｃの裏面１Ｃｃと、第二金属部材２Ｃの第二表面２Ｃｄとが重ね合わされて突合せ部Ｊ７が形成される。また、補助部材１０Ｃの側面１０Ｃｂと第一金属部材１Ｃの端面１Ｃａとが突き合わされて突合せ部Ｊ５が形成される。また、補助部材１０Ｃの側面１０Ｃｃと第二金属部材２Ｃの第一端面２Ｃａとが突き合わされて突合せ部Ｊ６が形成される。 The butting step is, as shown in FIG. 9, a step of overlapping the first metal member 1C and the second metal member 2C with the auxiliary member 10C interposed therebetween. In the butting step, the back surface 1Cc of the first metal member 1C and the second surface 2Cd of the second metal member 2C are overlapped to form a butting portion J7. Further, the side surface 10Cb of the auxiliary member 10C and the end surface 1Ca of the first metal member 1C are butted together to form a butting portion J5. Moreover, the side surface 10Cc of the auxiliary member 10C and the first end surface 2Ca of the second metal member 2C are butted together to form a butting portion J6.

接合工程は、図１０に示すように、回転ツールＦを用いて第一金属部材１Ｃと第二金属部材２Ｃを摩擦攪拌接合する工程である。接合工程では、右回転させた回転ツールＦの攪拌ピンＦ２を補助部材１０Ｃの表面１０Ｃａの幅方向中央に挿入する。接合工程では、本実施形態では攪拌ピンＦ２の下端部の外周面は、第一金属部材１Ｃの端面１Ｃａ及び第二金属部材２Ｃの第一端面２Ｃａに接触させず、攪拌ピンＦ２の上端部の外周面は、第一金属部材１Ｃの端面１Ｃａ及び第二金属部材２Ｃの第一端面２Ｃａに接触させた状態で、攪拌ピンＦ２を補助部材１０Ｃに沿って相対移動させる。 The joining step is, as shown in FIG. 10, a step of friction stir joining the first metal member 1C and the second metal member 2C using a rotary tool F. As shown in FIG. In the joining step, the stirring pin F2 of the rotating tool F rotated to the right is inserted into the widthwise center of the surface 10Ca of the auxiliary member 10C. In the joining step, in the present embodiment, the outer peripheral surface of the lower end of the stirring pin F2 does not contact the end surface 1Ca of the first metal member 1C and the first end surface 2Ca of the second metal member 2C. The outer peripheral surface relatively moves the stirring pin F2 along the auxiliary member 10C while being in contact with the end surface 1Ca of the first metal member 1C and the first end surface 2Ca of the second metal member 2C.

接合工程では、攪拌ピンＦ２のみを第一金属部材１Ｃ、第二金属部材２Ｃ及び補助部材１０Ｃに接触させ、攪拌ピンＦ２の基端側は、第一金属部材１Ｃ及び第二金属部材２Ｃから露出した状態で摩擦攪拌を行う。攪拌ピンＦ２の平坦面Ｆ３は、第二金属部材２の第二表面２Ｃｄに接触しない範囲で深い位置まで挿入する。回転ツールＦを補助部材１０Ｃに沿って相対移動させ、終了位置に達したら回転ツールＦを補助部材１０Ｃから離脱させる。以上により、突合せ部Ｊ５，Ｊ６が一の工程で同時に摩擦攪拌接合される。回転ツールＦの移動軌跡には塑性化領域Ｗが形成される。 In the joining step, only the stirring pin F2 is brought into contact with the first metal member 1C, the second metal member 2C, and the auxiliary member 10C, and the base end side of the stirring pin F2 is exposed from the first metal member 1C and the second metal member 2C. Friction stir is performed in this state. The flat surface F3 of the stirring pin F2 is inserted to a deep position within a range that does not contact the second surface 2Cd of the second metal member 2 . The rotary tool F is relatively moved along the auxiliary member 10C, and when the end position is reached, the rotary tool F is separated from the auxiliary member 10C. As described above, the butted portions J5 and J6 are simultaneously friction stir welded in one step. A plasticized region W is formed in the movement trajectory of the rotating tool F. As shown in FIG.

以上説明した第四実施形態によっても第一実施形態と略同等の効果を奏することができる。 Approximately the same effect as the first embodiment can be obtained by the fourth embodiment described above.

［第五実施形態］
次に、本発明の第五実施形態に係る接合方法について説明する。図１１は、本発明の第五実施形態に係る接合方法の準備工程を示す断面図である。第五実施形態に係る接合方法は、準備工程と、突合せ工程と、接合工程とを行う。第五実施形態では、補助部材１０ＣＡの形状が第四実施形態と主に相違する。本実施形態では、第四実施形態と相違する部分を中心に説明する。 [Fifth embodiment]
Next, a joining method according to a fifth embodiment of the present invention will be described. FIG. 11 is a cross-sectional view showing a preparatory step of a joining method according to a fifth embodiment of the present invention. A joining method according to the fifth embodiment performs a preparation process, a matching process, and a joining process. The fifth embodiment differs from the fourth embodiment mainly in the shape of the auxiliary member 10CA. In this embodiment, a description will be given centering on the parts that are different from the fourth embodiment.

図１１に示すように、第一金属部材１Ｃは第四実施形態と同一である。第二金属部材２Ｃの第二表面２Ｃｄには、凹溝部１５が形成されている。凹溝部１５は断面矩形状に形成されている。 As shown in FIG. 11, the first metal member 1C is the same as in the fourth embodiment. A groove portion 15 is formed on the second surface 2Cd of the second metal member 2C. The concave groove portion 15 is formed to have a rectangular cross section.

補助部材１０ＣＡは、断面矩形状の本体部１１と、本体部１１の裏面（底部）１０Ｃｄから突出する突起部１２とを備えている。突起部１２は、本体部１１の裏面（底部）１０Ｃｄよりも幅広となる断面矩形（横長の長方形）状を呈する。突起部１２は、補助部材１０Ｃの長手方向の全長に渡って形成されている。なお、突起部１２は、補助部材１０ＣＡの長手方向に沿って断続的に形成してもよい。突起部１２は、第二金属部材２Ｃの凹溝部１５に挿入される。 The auxiliary member 10CA includes a body portion 11 having a rectangular cross-section and projections 12 projecting from a rear surface (bottom portion) 10Cd of the body portion 11. As shown in FIG. The projecting portion 12 has a rectangular cross-section (horizontal rectangular shape) wider than the rear surface (bottom portion) 10Cd of the main body portion 11 . The projecting portion 12 is formed over the entire longitudinal length of the auxiliary member 10C. Note that the protrusions 12 may be intermittently formed along the longitudinal direction of the auxiliary member 10CA. The projecting portion 12 is inserted into the concave groove portion 15 of the second metal member 2C.

突合せ工程では、第一金属部材１Ｃと、第二金属部材２Ｃと、補助部材１０ＣＡとを突き合わせて架台Ｋに固定する。突合せ工程では、まず、補助部材１０ＣＡの突起部１２を凹溝部１５に挿入する。例えば、凹溝部１５の手前側又は奥側の開口部から突起部１２を挿入する。次に、第四実施形態と同じ要領で、各部材を突き合わせて突合せ部Ｊ５，Ｊ６，Ｊ７を形成する。接合工程は、第四実施形態と同一である。 In the butting step, the first metal member 1C, the second metal member 2C, and the auxiliary member 10CA are butted and fixed to the base K. In the butting step, first, the projecting portion 12 of the auxiliary member 10CA is inserted into the recessed groove portion 15. As shown in FIG. For example, the protrusion 12 is inserted through the opening on the front side or the back side of the recessed groove 15 . Next, in the same manner as in the fourth embodiment, butt portions J5, J6, and J7 are formed by butting each member. The bonding process is the same as in the fourth embodiment.

以上説明した第五実施形態によっても、第四実施形態と略同等の効果を奏することができる。また、突起部１２を備えることにより、補助部材１０ＣＡの浮き上がりを防ぐことができる。 The fifth embodiment described above can also achieve substantially the same effects as the fourth embodiment. In addition, by providing the projecting portion 12, it is possible to prevent the auxiliary member 10CA from floating.

以上本発明の実施形態について説明したが、本発明の趣旨に反しない範囲で適宜設計変更が可能である。例えば、第二～第五実施形態に係る接合工程でも、攪拌ピンＦ２の上端部（基端部）の外周面と、第一金属部材及び第二金属部材は接触させたが、これに限定されるものではない。塑性化領域が第一金属部材及び第二金属部材に到達するようにすれば、回転ツールＦの攪拌ピンＦ２と第一金属部材及び第二金属部材とを接触させずに摩擦攪拌接合を行ってもよい。 Although the embodiments of the present invention have been described above, design changes can be made as appropriate without departing from the gist of the present invention. For example, in the joining steps according to the second to fifth embodiments, the outer peripheral surface of the upper end (base end) of the stirring pin F2 is brought into contact with the first metal member and the second metal member, but the present invention is not limited to this. not something. If the plasticized region reaches the first metal member and the second metal member, friction stir welding can be performed without contact between the stirring pin F2 of the rotary tool F and the first metal member and the second metal member. good too.

１ 第一金属部材
１ａ 端面
２ 第二金属部材
２ａ 端面
１０ 補助部材
１２ 突起部
Ｊ１ 突合せ部
Ｊ２ 突合せ部
Ｆ 回転ツール
Ｆ２ 攪拌ピン REFERENCE SIGNS LIST 1 first metal member 1a end face 2 second metal member 2a end face 10 auxiliary member 12 protrusion J1 butt portion J2 butt portion F rotating tool F2 stirring pin

Claims (4)

先細りの攪拌ピンを備えた回転ツールを用いて一対の金属部材を接合する接合方法であって、
アルミニウム合金から形成された第一金属部材と、アルミニウム合金から形成された第二金属部材と、前記第一金属部材及び前記第二金属部材よりも硬度が低いアルミニウム又はアルミニウム合金から形成された断面矩形の補助部材を準備する準備工程と、
前記第一金属部材と前記第二金属部材の端部同士を向い合せて、前記端部同士の隙間に前記補助部材を挟み込み、前記第一金属部材の端面と前記補助部材の一方の側面とを突き合わせるとともに、前記第二金属部材の端面と前記補助部材の他方の側面とを突き合せて突合せ部を形成する突合せ工程と、
回転する前記回転ツールを前記補助部材の表面側から挿入するとともに、前記攪拌ピンのみを前記補助部材に接触させ前記攪拌ピンの基端側を露出させつつ、前記攪拌ピンの少なくとも基端側の外周面を前記第一金属部材及び前記第二金属部材に接触させた状態で、前記突合せ部に沿って前記回転ツールを相対移動させて前記第一金属部材と前記第二金属部材とを補助部材を介して接合する接合工程と、を含むことを特徴とする接合方法。 A joining method for joining a pair of metal members using a rotating tool equipped with a tapered stirring pin,
A first metal member made of an aluminum alloy, a second metal member made of an aluminum alloy, and a rectangular cross-section made of aluminum or an aluminum alloy having a hardness lower than that of the first metal member and the second metal member. A preparation step of preparing an auxiliary member of
The ends of the first metal member and the second metal member face each other, the auxiliary member is sandwiched between the ends, and the end surface of the first metal member and one side surface of the auxiliary member are sandwiched. a butting step of butting the end surface of the second metal member and the other side surface of the auxiliary member to form a butting portion;
While inserting the rotating rotating tool from the surface side of the auxiliary member, only the stirring pin is brought into contact with the auxiliary member to expose the proximal side of the stirring pin, and at least the outer circumference of the proximal side of the stirring pin is removed. With the surfaces in contact with the first metal member and the second metal member, the rotary tool is relatively moved along the butted portion to move the first metal member and the second metal member to the auxiliary member. and a joining step of joining through. 前記補助部材の裏面側に、浮き防止のための突起部を備え、
前記突合せ工程では、前記突起部が前記第一金属部材及び前記第二金属部材の少なくとも一方に係止するように前記第一金属部材と前記第二金属部材とを突き合わせることを特徴とする請求項１に記載の接合方法。 A protrusion for preventing floating is provided on the back side of the auxiliary member,
In the abutment step, the first metal member and the second metal member are abutted such that the protrusion engages with at least one of the first metal member and the second metal member. Item 1. The joining method according to Item 1. 先細りの攪拌ピンを備えた回転ツールを用いて一対の金属部材を接合する接合方法であって、
アルミニウム合金から形成された第一金属部材と、アルミニウム合金から形成された第二金属部材と、前記第一金属部材及び前記第二金属部材よりも硬度が低いアルミニウム又はアルミニウム合金から形成された断面矩形の補助部材を準備する準備工程と、
前記第一金属部材の端部と前記第二金属部材の側面とを突き合せて、前記第一金属部材の端部と前記第二金属部材の側面との隙間に前記補助部材を挟み込み、前記第一金属部材の端面と前記補助部材の一方の側面とを突き合せるとともに、前記第二金属部材の側面と前記補助部材の他方の側面とを突き合わせて突合せ部を形成する突合せ工程と、
回転する前記回転ツールを前記補助部材の表面側から挿入するとともに、前記攪拌ピンのみを前記補助部材に接触させ前記攪拌ピンの基端側を露出させつつ、前記攪拌ピンの少なくとも基端側の外周面を前記第一金属部材及び前記第二金属部材に接触させた状態で、前記突合せ部に沿って前記回転ツールを相対移動させて前記第一金属部材と前記第二金属部材とを補助部材を介して接合する接合工程と、を含むことを特徴とする接合方法。 A joining method for joining a pair of metal members using a rotating tool equipped with a tapered stirring pin,
A first metal member made of an aluminum alloy, a second metal member made of an aluminum alloy, and a rectangular cross-section made of aluminum or an aluminum alloy having a hardness lower than that of the first metal member and the second metal member. A preparation step of preparing an auxiliary member of
The end portion of the first metal member and the side surface of the second metal member are butted against each other, and the auxiliary member is sandwiched between the end portion of the first metal member and the side surface of the second metal member, a butting step of butting an end face of one metal member against one side surface of the auxiliary member and forming a butting portion by butting a side surface of the second metal member against the other side surface of the auxiliary member;
While inserting the rotating rotating tool from the surface side of the auxiliary member, only the stirring pin is brought into contact with the auxiliary member to expose the proximal side of the stirring pin, and at least the outer circumference of the proximal side of the stirring pin is removed. With the surfaces in contact with the first metal member and the second metal member, the rotary tool is relatively moved along the butted portion to move the first metal member and the second metal member to the auxiliary member. and a joining step of joining through. 前記補助部材の裏面側に、浮き防止のための突起部を備え、
前記突合せ工程では、前記突起部が前記第一金属部材及び前記第二金属部材の少なくとも一方に係止するように前記第一金属部材と前記第二金属部材とを突き合わせることを特徴とする請求項３に記載の接合方法。 A protrusion for preventing floating is provided on the back side of the auxiliary member,
In the abutment step, the first metal member and the second metal member are abutted such that the protrusion engages with at least one of the first metal member and the second metal member. Item 4. The joining method according to item 3.
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WO2016132768A1 (en) 2015-02-19 2016-08-25 日本軽金属株式会社 Joining method and method for manufacturing composite rolled material

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JP3329281B2 (en) * 1998-09-16 2002-09-30 日本軽金属株式会社 Aluminum or aluminum alloy sheet joining method
JP2003039183A (en) * 2001-07-25 2003-02-12 Hitachi Ltd Friction stir welding method and welded body
JP2018008306A (en) * 2016-07-15 2018-01-18 三菱重工業株式会社 Joining method for dissimilar metal

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US20030075584A1 (en) 2001-10-04 2003-04-24 Sarik Daniel J. Method and apparatus for friction stir welding
WO2016132768A1 (en) 2015-02-19 2016-08-25 日本軽金属株式会社 Joining method and method for manufacturing composite rolled material

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