JP2017159352A - Joining method - Google Patents

Joining method Download PDF

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JP2017159352A
JP2017159352A JP2016048276A JP2016048276A JP2017159352A JP 2017159352 A JP2017159352 A JP 2017159352A JP 2016048276 A JP2016048276 A JP 2016048276A JP 2016048276 A JP2016048276 A JP 2016048276A JP 2017159352 A JP2017159352 A JP 2017159352A
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metal member
metal
joining
auxiliary member
joining method
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JP6766385B2 (en
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堀 久司
Hisashi Hori
久司 堀
伸城 瀬尾
Nobushiro Seo
伸城 瀬尾
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Nippon Light Metal Co Ltd
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Nippon Light Metal Co Ltd
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Priority to JP2016048276A priority Critical patent/JP6766385B2/en
Priority to PCT/JP2016/086583 priority patent/WO2017119232A1/en
Priority to CN201680049474.2A priority patent/CN108025391A/en
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Abstract

PROBLEM TO BE SOLVED: To provide a joining method capable of preventing an inner corner from metal shortage as well as allowing easy deburring.SOLUTION: A joining method for joining two metal members having abutting surfaces shaped differently from each other, by using a rotary joining tool F having an agitation pin F2, comprises: an abutting step for forming an abutting part J1 in which one metal member 1 abutting the other metal member 2; an arranging step for arranging a plate-like auxiliary member 10 at an inner corner of both metal members along a circumferential direction of the other metal member 2; a friction agitation step for inserting a rotary agitation pin F2 into the inner corner, and performing friction agitation at the abutting part J1 along a circumferential direction of the other metal member 2 with only the agitation pin F2 contacting both of the metal members and the auxiliary member 10; and a removal step for removing the auxiliary member 10 from at least one of the metal member 1 and the other metal member 2.SELECTED DRAWING: Figure 4

Description

本発明は、金属部材同士を摩擦攪拌で接合する接合方法に関する。   The present invention relates to a joining method for joining metal members together by friction stirring.

例えば、特許文献1には、大きさが異なる第一金属部材と第二金属部材とを摩擦攪拌接合する接合方法が開示されている。当該接合方法では、第一金属部材と第二金属部材とを突き合わせる突合せ工程と、第一金属部材と第二金属部材との内隅に三角柱状の補助部材を配置する工程と、補助部材の上から回転ツールの攪拌ピンを挿入し、攪拌ピンのみを第一金属部材、第二金属部材及び補助部材に接触させた状態で突合せ部に対して摩擦攪拌を行うというものである。   For example, Patent Document 1 discloses a joining method in which a first metal member and a second metal member having different sizes are joined by friction stir welding. In the joining method, a butting step of abutting the first metal member and the second metal member, a step of arranging a triangular prism-shaped auxiliary member at the inner corner of the first metal member and the second metal member, The stirring pin of the rotary tool is inserted from above, and friction stirring is performed on the butt portion in a state where only the stirring pin is in contact with the first metal member, the second metal member, and the auxiliary member.

特開2015−223607号公報JP 2015-223607 A

従来の接合方法であると、内隅に補助部材を配置し、攪拌ピンを第一金属部材、第二金属部材及び補助部材に接触させた状態で突合せ部に対して摩擦攪拌を行うため、接合部(内隅)が金属不足になるのを防ぐことができる。しかし、摩擦攪拌工程後に内隅にバリが多く発生するため、バリを除去する作業が煩雑になるという問題がある。   In the conventional joining method, an auxiliary member is disposed in the inner corner, and the stirring pin is brought into contact with the first metal member, the second metal member, and the auxiliary member, so that frictional stirring is performed on the butt portion. It is possible to prevent the portion (inner corner) from running out of metal. However, since many burrs are generated in the inner corner after the friction stirring step, there is a problem that the operation of removing the burrs becomes complicated.

そこで、本発明は、接合部が金属不足になるのを防ぐとともに、バリを容易に除去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。   Then, this invention makes it a subject to provide the joining method which can remove a burr | flash easily while preventing that a junction part runs out of metal shortage.

前記課題を解決するために、本発明は、攪拌ピンを備えた回転ツールを用いて、突き合わされる面の形状が互いに異なる二つの金属部材を接合する接合方法であって、一方の前記金属部材と他方の前記金属部材とを突き合わせて突合せ部を形成する突合せ工程と、他方の前記金属部材の周方向に亘って、前記金属部材同士の内隅に補助部材を配置する配置工程と、回転した前記攪拌ピンを前記内隅に挿入し、前記攪拌ピンのみを前記金属部材同士及び前記補助部材に接触させた状態で、他方の前記金属部材の周方向に亘って前記突合せ部の摩擦攪拌を行う摩擦攪拌工程と、前記補助部材を一方の前記金属部材及び他方の前記金属部材の少なくとも一方から除去する除去工程と、を含むことを特徴とする。   In order to solve the above-mentioned problem, the present invention is a joining method for joining two metal members having different shapes of surfaces to be abutted using a rotary tool provided with a stirring pin, and one of the metal members And the other metal member butted together to form a butted portion, and the circumferential step of the other metal member, the placement step of placing an auxiliary member in the inner corner of the metal members, rotated With the stirring pin inserted into the inner corner and only the stirring pin in contact with the metal members and the auxiliary member, the abutting portion is frictionally stirred over the circumferential direction of the other metal member. A friction stirring step, and a removal step of removing the auxiliary member from at least one of the one metal member and the other metal member.

かかる接合方法によれば、金属部材同士に加え、補助部材も同時に摩擦攪拌接合することにより、接合部の金属不足を防ぐことができる。また、除去工程によって、補助部材ごとバリを除去することができるため、バリを容易に除去することができる。   According to such a joining method, in addition to the metal members, the auxiliary member is also subjected to friction stir welding at the same time, so that a metal shortage at the joint portion can be prevented. Further, since the burrs can be removed together with the auxiliary member by the removing step, the burrs can be easily removed.

また、前記摩擦攪拌工程では、摩擦攪拌で発生するバリが前記補助部材に形成されるように、接合条件を設定することが好ましい。かかる接合方法によれば、バリが補助部材に集約されるため、バリをより容易に除去することができる。   In the friction stirring step, it is preferable to set the joining conditions so that burrs generated by friction stirring are formed on the auxiliary member. According to such a joining method, since the burrs are collected on the auxiliary member, the burrs can be removed more easily.

また、前記金属部材は、いずれも板状を呈し、前記突合せ工程では、一方の前記金属部材の表面と他方の前記金属部材の裏面とを突き合わせることが好ましい。
また、一方の前記金属部材は、板状を呈し、他方の前記金属部材は、円柱状を呈し、前記突合せ工程では、一方の前記金属部材の表面と他方の金属部材の端面とを突き合わせることが好ましい。
また、一方の前記金属部材は、板状を呈し、他方の前記金属部材は、筒状を呈し、前記突合せ工程では、一方の前記金属部材の表面と他方の金属部材の端面とを突き合わせることが好ましい。
また、一方の前記金属部材は、板状を呈し、他方の前記金属部材は、円筒状を呈し、前記突合せ工程では、一方の前記金属部材の表面と他方の金属部材の端面とを突き合わせることが好ましい。
また、一方の前記金属部材に貫通孔が形成されており、前記突合せ工程では、前記貫通孔を他方の前記金属部材で覆うことが好ましい。
また、一方の前記金属部材に貫通孔が形成されており、前記突合せ工程では、前記貫通孔と他方の前記金属部材の中空部とを連通させることが好ましい。
Moreover, all the said metal members are plate-shaped, and it is preferable to abut | match the surface of one said metal member, and the back surface of the other said metal member in the said butt | matching process.
Further, one of the metal members has a plate shape, and the other metal member has a columnar shape, and in the butting step, the surface of one of the metal members and the end surface of the other metal member are butted. Is preferred.
In addition, one of the metal members has a plate shape, and the other metal member has a cylindrical shape. In the butting step, the surface of one of the metal members and the end surface of the other metal member are butted. Is preferred.
In addition, one of the metal members has a plate shape, and the other metal member has a cylindrical shape. In the butting step, the surface of one of the metal members and the end surface of the other metal member are butted. Is preferred.
Further, it is preferable that a through hole is formed in one of the metal members, and the through hole is covered with the other metal member in the butting step.
Further, it is preferable that a through hole is formed in one of the metal members, and the through hole and the hollow portion of the other metal member are communicated with each other in the butting step.

かかる接合方法によれば、様々な形状の金属部材同士を接合することができる。   According to this joining method, metal members having various shapes can be joined together.

本発明に係る接合方法によれば、接合部が金属不足になるのを防ぐとともに、バリを容易に除去することができる。   According to the joining method according to the present invention, it is possible to prevent the burrs from being easily removed while preventing the joining portion from becoming a metal shortage.

本発明の第一実施形態に係る接合方法の準備工程及び突合せ工程を示す斜視図である。It is a perspective view which shows the preparation process and butt | matching process of the joining method which concern on 1st embodiment of this invention. 第一実施形態に係る接合方法の配置工程を示す斜視図である。It is a perspective view which shows the arrangement | positioning process of the joining method which concerns on 1st embodiment. 第一実施形態に係る接合方法の摩擦攪拌工程を示す斜視図である。It is a perspective view which shows the friction stirring process of the joining method which concerns on 1st embodiment. 第一実施形態に係る接合方法の摩擦攪拌工程を示す断面図である。It is sectional drawing which shows the friction stirring process of the joining method which concerns on 1st embodiment. 第一実施形態に係る接合方法の摩擦攪拌工程の終了位置を示す斜視図である。It is a perspective view which shows the completion | finish position of the friction stirring process of the joining method which concerns on 1st embodiment. 第一実施形態に係る接合方法の除去工程を示す斜視図である。It is a perspective view which shows the removal process of the joining method which concerns on 1st embodiment. 第一実施形態に係る接合方法の除去工程を示す断面図である。It is sectional drawing which shows the removal 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準備工程及び突合せ工程を示す斜視図である。It is a perspective view which shows the preparation process and butt | matching process of the joining method which concern on 2nd embodiment of this invention. 第二実施形態に係る接合方法の配置工程を示す斜視図である。It is a perspective view which shows the arrangement | positioning process of the joining method which concerns on 2nd embodiment. 第二実施形態に係る接合方法の摩擦攪拌工程を示す斜視図である。It is a perspective view which shows the friction stirring process of the joining method which concerns on 2nd embodiment. 第二実施形態に係る接合方法の摩擦攪拌工程を示す断面図である。It is sectional drawing which shows the friction stirring process of the joining method which concerns on 2nd embodiment. 第二実施形態に係る接合方法の除去工程を示す断面図である。It is sectional drawing which shows the removal process of the joining method which concerns on 2nd embodiment. 第三実施形態に係る接合方法の準備工程及び突合せ工程を示す斜視図である。It is a perspective view which shows the preparation process and matching process of the joining method which concern on 3rd embodiment. 第三実施形態に係る接合方法の配置工程を示す斜視図である。It is a perspective view which shows the arrangement | positioning process of the joining method which concerns on 3rd embodiment. 第四実施形態に係る接合方法の配置工程を示す斜視図である。It is a perspective view which shows the arrangement | positioning process of the joining method which concerns on 4th embodiment. 第四実施形態に係る接合方法の配置工程を示す断面図である。It is sectional drawing which shows the arrangement | positioning process of the joining method which concerns on 4th embodiment.

[第一実施形態]
本発明の第一実施形態に係る接合方法について図面を参照して詳細に説明する。本実施形態に係る接合方法では、準備工程と、突合せ工程と、配置工程と、摩擦攪拌工程と、除去工程と、を行う。なお、以下の説明における「表面」とは、「裏面」の反対側の面という意味である。
[First embodiment]
A joining method according to a first embodiment of the present invention will be described in detail with reference to the drawings. In the joining method according to the present embodiment, a preparation process, a butting process, an arranging process, a friction stirring process, and a removing process are performed. In the following description, “front surface” means a surface opposite to the “back surface”.

準備工程は、図1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はいずれも直方体(板状)を呈する。第一金属部材1は、第二金属部材2よりも大きくなっている。特許請求の範囲の「突き合わされる面の形状が互いに異なる二つの金属部材」とは、金属部材同士の突き合わされる面の形状が異なる場合と、本実施形態のように第一金属部材1の表面1bと、第二金属部材2の裏面2cのように突き合わされる面の大きさが異なる場合(相似の場合)も含む意味である。   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 both have a rectangular parallelepiped (plate shape). The first metal member 1 is larger than the second metal member 2. “Two metal members having different shapes of the surfaces to be faced” in the claims means that the shape of the surfaces to be faced of the metal members is different from that of the first metal member 1 as in the present embodiment. This also includes the case where the sizes of the surface 1b and the face to be abutted are different like the back surface 2c of the second metal member 2 (similar cases).

第一金属部材1及び第二金属部材2の材料は、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、アルミニウム合金、銅、銅合金、チタン、チタン合金、マグネシウム、マグネシウム合金等から適宜選択すればよい。   The material of the first metal member 1 and the second metal member 2 is not particularly limited as long as it is a metal that can be frictionally stirred. For example, aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, magnesium alloy, etc. May be selected as appropriate.

補助部材10は、中央に矩形の中空部11を備えた金属製の薄板の枠状部材である。補助部材10は、摩擦攪拌可能な金属であれば特に制限されないが、本実施形態では第一金属部材1及び第二金属部材2と同じ材料になっている。補助部材10の一部には幅方向に亘って連続するスリット10dが形成されている。   The auxiliary member 10 is a metal thin plate-like frame member having a rectangular hollow portion 11 at the center. The auxiliary member 10 is not particularly limited as long as it is a metal capable of friction stirring, but in the present embodiment, the auxiliary member 10 is made of the same material as the first metal member 1 and the second metal member 2. A part of the auxiliary member 10 is formed with a slit 10d continuous in the width direction.

突合せ工程は、第一金属部材1と第二金属部材2を突き合わせる工程である。突合せ工程では、第一金属部材1の表面1bの中央部と、第二金属部材2の裏面2cとを突き合わせる。これにより、突合せ部J1が形成される。また、第一金属部材1の表面1bと第二金属部材2の4つの側面2dとで内隅が形成される。さらに、第一金属部材1の表面1bには、第二金属部材2で覆われない枠状の露出部が形成される。   The butting process is a process in which the first metal member 1 and the second metal member 2 are butted together. In the butting step, the center portion of the front surface 1b of the first metal member 1 and the back surface 2c of the second metal member 2 are butted. Thereby, the butt | matching part J1 is formed. An inner corner is formed by the surface 1 b of the first metal member 1 and the four side surfaces 2 d of the second metal member 2. Further, a frame-shaped exposed portion that is not covered with the second metal member 2 is formed on the surface 1 b of the first metal member 1.

配置工程は、図2に示すように、内隅に補助部材10を配置する工程である。配置工程では、補助部材10の中空部11に第二金属部材2を挿通させ、第一金属部材1の表面1bに補助部材10を配置する。補助部材10の平面形状は、第一金属部材1の露出部と同じ形状になっている。つまり、第二金属部材2に補助部材10の中空部11を通すと第一金属部材1の表面1bの露出部に隙間なく配置される。補助部材10の内周縁は、第二金属部材2の側面2dに接触するか、若しくは側面2dと微細な隙間をあけて対向する。補助部材10の板厚は、後記する摩擦攪拌工程後の塑性化領域Wが金属不足にならない程度に適宜設定する。また、第一金属部材1、第二金属部材2及び補助部材10を治具(図示省略)を用いて架台に移動不能に拘束する。   The placement step is a step of placing the auxiliary member 10 in the inner corner as shown in FIG. In the arranging step, the second metal member 2 is inserted into the hollow portion 11 of the auxiliary member 10, and the auxiliary member 10 is arranged on the surface 1 b of the first metal member 1. The planar shape of the auxiliary member 10 is the same shape as the exposed portion of the first metal member 1. That is, when the hollow portion 11 of the auxiliary member 10 is passed through the second metal member 2, the auxiliary metal member 1 is disposed without any gap on the exposed portion of the surface 1 b of the first metal member 1. The inner peripheral edge of the auxiliary member 10 contacts the side surface 2d of the second metal member 2 or faces the side surface 2d with a minute gap. The plate | board thickness of the auxiliary member 10 is suitably set to such an extent that the plasticization area | region W after the friction stirring process mentioned later does not become metal shortage. Moreover, the 1st metal member 1, the 2nd metal member 2, and the auxiliary member 10 are restrained on a mount so that a movement is impossible using a jig | tool (illustration omitted).

摩擦攪拌工程は、図3及び図4に示すように、接合用回転ツールFを用いて第一金属部材1と第二金属部材2との突合せ部J1を摩擦攪拌によって接合する工程である。接合用回転ツールFは、連結部F1と、攪拌ピンF2とで構成されている。接合用回転ツールFは、特許請求の範囲の「回転ツール」に相当する。接合用回転ツールFは、例えば工具鋼で形成されている。連結部F1は、摩擦攪拌装置の回転軸(図示省略)に連結される部位である。連結部F1は円柱状を呈している。   As shown in FIGS. 3 and 4, the friction stirring step is a step of joining the abutting portion J <b> 1 between the first metal member 1 and the second metal member 2 by friction stirring using the welding rotary tool F. The joining rotary tool F includes a connecting portion F1 and a stirring pin F2. The joining rotary tool F corresponds to a “rotary tool” in the claims. The joining rotary tool F is made of, for example, tool steel. The connecting part F1 is a part connected to a rotating shaft (not shown) of the friction stirrer. The connecting portion F1 has a cylindrical shape.

攪拌ピンF2は、連結部F1から垂下しており、連結部F1と同軸になっている。攪拌ピンF2は連結部F1から離間するにつれて先細りになっている。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、接合用回転ツールFを右回転させるため、螺旋溝は、基端から先端に向かうにつれて左回りに形成されている。言い換えると、螺旋溝は、螺旋溝を基端から先端に向けてなぞると上から見て左回りに形成されている。   The stirring pin F2 hangs down from the connecting portion F1 and is coaxial with the connecting portion F1. The stirring pin F2 is tapered as it is separated from the connecting portion F1. A spiral groove is formed on the outer peripheral surface of the stirring pin F2. In the present embodiment, the spiral groove is formed in a counterclockwise direction from the proximal end toward the distal end in order to rotate the joining rotary tool F to the right. In other words, the spiral groove is formed counterclockwise as viewed from above when the spiral groove is traced from the proximal end to the distal end.

なお、接合用回転ツールFを左回転させる場合は、螺旋溝を基端から先端に向かうにつれて右回りに形成することが好ましい。言い換えると、この場合の螺旋溝は、螺旋溝を基端から先端に向けてなぞると上から見て右回りに形成されている。螺旋溝をこのように設定することで、摩擦攪拌の際に塑性流動化した金属が螺旋溝によって攪拌ピンF2の先端側に導かれる。これにより、被接合金属部材(第一金属部材1、第二金属部材2及び補助部材10)の外部に溢れ出る金属の量を少なくすることができる。螺旋溝は省略してもよい。   In addition, when rotating the rotation tool F for joining counterclockwise, it is preferable to form a spiral groove clockwise as it goes to a front-end | tip from a base end. In other words, the spiral groove in this case is formed clockwise when viewed from above when the spiral groove is traced from the proximal end to the distal end. By setting the spiral groove in this way, the metal plastically fluidized during friction stirring is guided to the tip side of the stirring pin F2 by the spiral groove. Thereby, the quantity of the metal which overflows outside the to-be-joined metal member (the 1st metal member 1, the 2nd metal member 2, and the auxiliary member 10) can be decreased. The spiral groove may be omitted.

接合用回転ツールFは、マシニングセンタ等の摩擦攪拌装置に取り付けてもよいが、例えば、先端にスピンドルユニット等の回転手段を備えたアームロボットに取り付けてもよい。アームロボットに接合用回転ツールFを取り付けることにより接合用回転ツールFの回転中心軸Fcの傾斜角度を容易に変更することができる。   The joining rotary tool F may be attached to a friction stirrer such as a machining center, but may be attached to, for example, an arm robot having a rotating means such as a spindle unit at the tip. By attaching the joining rotary tool F to the arm robot, the inclination angle of the rotation center axis Fc of the joining rotary tool F can be easily changed.

摩擦攪拌工程では、図3に示すように、まず、補助部材10の表面10bに設定した開始位置Spに右回転させた接合用回転ツールFの攪拌ピンF2を挿入し、内隅に向けて相対移動させる。そして、攪拌ピンF2が内隅に達したら図4に示すように、接合用回転ツールFの回転中心軸Fcを第二金属部材2に対して外側に傾斜させる。そして、傾斜させた状態で接合用回転ツールFを第二金属部材2の周囲に亘って相対移動させて突合せ部J1を摩擦攪拌接合する。接合用回転ツールFの移動軌跡には、塑性化領域Wが形成される。   In the friction agitation step, as shown in FIG. 3, first, the agitation pin F2 of the rotating tool F for rotation rotated to the start position Sp set on the surface 10b of the auxiliary member 10 is inserted and moved toward the inner corner. Move. When the stirring pin F2 reaches the inner corner, the rotation center axis Fc of the bonding rotary tool F is inclined outward with respect to the second metal member 2 as shown in FIG. And the rotating tool F for joining is relatively moved over the circumference | surroundings of the 2nd metal member 2 in the inclined state, and the butt | matching part J1 is friction-stir-welded. A plasticized region W is formed in the movement locus of the welding rotary tool F.

摩擦攪拌工程では、突合せ部J1に右回転させた攪拌ピンF2のみを挿入し、被接合金属部材と連結部F1とは離間させつつ相対移動させる。言い換えると、攪拌ピンF2の基端部は露出させた状態で摩擦攪拌接合を行う。そして、第一金属部材1、第二金属部材2及び補助部材10と攪拌ピンF2とを接触させた状態で突合せ部J1に沿って接合用回転ツールFを相対移動させる。   In the friction stirring step, only the stirring pin F2 rotated to the right is inserted into the abutting portion J1, and the metal member to be joined and the connecting portion F1 are moved relative to each other while being separated from each other. In other words, the friction stir welding is performed with the base end portion of the stirring pin F2 exposed. And the rotation tool F for joining is relatively moved along the abutting part J1 in the state which made the 1st metal member 1, the 2nd metal member 2, the auxiliary member 10, and the stirring pin F2 contact.

本実施形態では、接合用回転ツールFの進行方向右側に補助部材10が位置するように接合用回転ツールFの進行方向を設定する。接合用回転ツールFの回転方向及び進行方向は前記したものに限定されるものではなく適宜設定すればよい。例えば、接合用回転ツールFの進行方向右側に補助部材10を配置しつつ、接合用回転ツールFを左回転させてもよい。もしくは、接合用回転ツールFの進行方向左側に補助部材10を配置し、接合用回転ツールFを左右いずれかに回転させてもよい。接合用回転ツールFの回転方向等の条件と補助部材10との好ましい位置関係については後記する。   In this embodiment, the advancing direction of the joining rotary tool F is set so that the auxiliary member 10 is positioned on the right side in the advancing direction of the joining rotary tool F. The rotation direction and the traveling direction of the joining rotary tool F are not limited to those described above, and may be set as appropriate. For example, the joining rotary tool F may be rotated counterclockwise while the auxiliary member 10 is disposed on the right side in the traveling direction of the joining rotary tool F. Alternatively, the auxiliary member 10 may be disposed on the left side in the traveling direction of the joining rotary tool F, and the joining rotary tool F may be rotated to the left or right. The preferable positional relationship between the auxiliary member 10 and the conditions such as the rotation direction of the joining rotary tool F will be described later.

攪拌ピンF2の挿入深さは、攪拌ピンF2と突合せ部J1とが接触するように設定すればよい。図5に示すように、接合用回転ツールFを第二金属部材2の周囲に一周させて、塑性化領域Wをオーバーラップさせたら、補助部材10の表面10bに設定された終了位置Epで接合用回転ツールFを離脱させる。なお、この際に、接合用回転ツールFの抜き穴が形成されるが、当該抜き穴に肉盛溶接を行って補修してもよい。もしくは、抜き穴が形成されないように接合用回転ツールFを相対移動させながら徐々に引き抜いてもよい。   What is necessary is just to set the insertion depth of the stirring pin F2 so that the stirring pin F2 and the butt | matching part J1 may contact. As shown in FIG. 5, when the joining rotary tool F is made to make a round around the second metal member 2 and the plasticizing region W is overlapped, joining is performed at the end position Ep set on the surface 10 b of the auxiliary member 10. The rotary tool F is removed. At this time, the punched hole of the bonding rotary tool F is formed, but the welded hole may be repaired by overlay welding. Alternatively, the joining rotary tool F may be gradually pulled out so as not to form a punched hole.

除去工程は、図6に示すように、補助部材10を第一金属部材1から除去する工程である。補助部材10は、スリット10d(図5参照)を境にして補助部材10の端部をめくり上げるとともに、図7に示すように、第一金属部材1の表面1bから離間する方向に補助部材10を折り曲げて、第一金属部材1から補助部材10を除去する。   The removing step is a step of removing the auxiliary member 10 from the first metal member 1 as shown in FIG. The auxiliary member 10 flips up the end of the auxiliary member 10 with the slit 10d (see FIG. 5) as a boundary, and as shown in FIG. 7, the auxiliary member 10 moves away from the surface 1b of the first metal member 1. And the auxiliary member 10 is removed from the first metal member 1.

以上説明した本実施形態に係る接合方法によれば、第一金属部材1と第二金属部材2とが接合されるとともに、第一金属部材1及び第二金属部材2に加え、補助部材10も同時に摩擦攪拌接合することにより、接合部(塑性化領域W)の金属不足を防ぐことができる。   According to the joining method according to the present embodiment described above, the first metal member 1 and the second metal member 2 are joined, and in addition to the first metal member 1 and the second metal member 2, the auxiliary member 10 is also used. By performing friction stir welding at the same time, it is possible to prevent metal shortage at the joint (plasticized region W).

また、本実施形態によれば、摩擦攪拌工程によって補助部材10にバリVが形成されるが、除去工程において補助部材10ごと取り除くことができる。これにより、バリVを除去する作業を容易に行うことができる。補助部材10は除去装置等を用いてもよいが、本実施形態では手作業で容易に補助部材10を取り除くことができる。また、本実施形態では、攪拌ピンF2のみを被接合金属部材に接触させるため、回転ツールのショルダ部を接触させる場合に比べて摩擦攪拌装置に作用する負荷を低減することができる。また、接合用回転ツールFの攪拌ピン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に接触させた状態で摩擦攪拌を行うため、突合せ部J1の深い位置まで攪拌ピンを挿入することができる。これにより、第一金属部材1と第二金属部材2とを好適に接合することができる。   Moreover, according to this embodiment, although the burr | flash V is formed in the auxiliary member 10 by a friction stirring process, it can remove with the auxiliary member 10 in a removal process. Thereby, the operation | work which removes the burr | flash V can be performed easily. Although the auxiliary member 10 may use a removing device or the like, in this embodiment, the auxiliary member 10 can be easily removed manually. Moreover, in this embodiment, since only the stirring pin F2 is made to contact with a to-be-joined metal member, the load which acts on a friction stirring apparatus can be reduced compared with the case where the shoulder part of a rotary tool is made to contact. Further, since the friction stir is performed in a state where only the stirring pin F2 of the rotating tool F for welding is in contact with the first metal member 1, the second metal member 2, and the auxiliary member 10, the stirring pin is inserted to a deep position of the butt portion J1. Can be inserted. Thereby, the 1st metal member 1 and the 2nd metal member 2 can be joined suitably.

また、図4に示すように、本実施形態に係る摩擦攪拌工程では進行方向右側に補助部材10を配置するとともに接合用回転ツールFを右回転させるため、補助部材10側がRe側となる。Re側とは、接合用回転ツールFの外周における接線速度の大きさから送り速度の大きさが減算される側である。一方、Re側の反対側がAd側となる。Ad側とは、接合用回転ツールFの外周における接線速度の大きさから送り速度の大きさが加算される側である。   In addition, as shown in FIG. 4, in the friction stirring step according to the present embodiment, the auxiliary member 10 is disposed on the right side in the traveling direction and the welding rotary tool F is rotated to the right, so the auxiliary member 10 side is the Re side. The Re side is the side on which the magnitude of the feed speed is subtracted from the magnitude of the tangential speed on the outer circumference of the welding rotary tool F. On the other hand, the side opposite to the Re side is the Ad side. The Ad side is a side where the magnitude of the feed speed is added from the magnitude of the tangential speed on the outer periphery of the welding rotary tool F.

例えば、接合用回転ツールFの回転速度が遅い場合では、塑性化領域WのRe側に比べてAd側の方が塑性流動材の温度が上昇しやすくなるため、Ad側にバリVが多く発生する傾向にある。一方、例えば、接合用回転ツールFの回転速度が速い場合、Ad側の方が塑性流動材の温度が上昇するものの、回転速度が速い分、Re側にバリVが発生する傾向にある。   For example, when the rotational speed of the welding rotary tool F is low, the temperature of the plastic fluidized material is more likely to rise on the Ad side than on the Re side of the plasticizing region W, so that more burrs V are generated on the Ad side. Tend to. On the other hand, for example, when the rotational speed of the bonding rotary tool F is high, the temperature of the plastic fluidized material increases on the Ad side, but there is a tendency that burrs V are generated on the Re side due to the higher rotational speed.

本実施形態では、接合用回転ツールFの回転速度を速く設定しているため、Re側即ち補助部材10側にバリVが発生する。つまり、本実施形態ではバリVが補助部材10側に多く形成されるように接合用回転ツールFの回転速度、回転方向及び進行方向等を設定している。これにより、補助部材10に形成されたバリVは、補助部材10ごと除去されるため、バリ除去工程をより容易に行うことができる。また、接合用回転ツールFの回転速度を速く設定することにより、接合用回転ツールFの移動速度(送り速度)を高めることができる。これにより、接合サイクルを短くすることができる。   In the present embodiment, since the rotation speed of the bonding rotary tool F is set to be high, a burr V is generated on the Re side, that is, the auxiliary member 10 side. That is, in the present embodiment, the rotational speed, the rotational direction, the traveling direction, and the like of the bonding rotary tool F are set so that a large number of burrs V are formed on the auxiliary member 10 side. Thereby, since the burr | flash V formed in the auxiliary member 10 is removed with the auxiliary member 10, the burr | flash removal process can be performed more easily. Moreover, the moving speed (feeding speed) of the joining rotary tool F can be increased by setting the rotational speed of the joining rotary tool F faster. Thereby, a joining cycle can be shortened.

上記したように、摩擦攪拌工程の際に、接合用回転ツールFの進行方向のどちら側にバリVが発生するかは接合条件によって異なる。当該接合条件とは、接合用回転ツールFの回転速度、回転方向、移動速度(送り速度)、攪拌ピンF2の傾斜角度(テーパー角度)、第一金属部材1、第二金属部材2及び補助部材10の材料、各部材の厚さ等の各要素とこれらの要素の組み合わせで決定される。接合条件に応じて、バリVが発生する側又はバリVが多く発生する側に補助部材10を配置するようにすれば、バリ除去工程を容易に行うことができるため好ましい。   As described above, in the friction stirring step, which side of the traveling direction of the welding rotary tool F the burr V is generated varies depending on the joining conditions. The joining conditions include the rotational speed, rotational direction, moving speed (feed speed) of the rotating tool F for joining, the inclination angle (taper angle) of the stirring pin F2, the first metal member 1, the second metal member 2, and the auxiliary member. 10 materials, the thickness of each member, etc., and the combination of these elements. It is preferable to arrange the auxiliary member 10 on the side where burrs V are generated or on the side where many burrs V are generated, depending on the joining conditions, because the burr removing step can be easily performed.

また、補助部材10にスリット10dを設けているため、除去工程の際に、スリット10dを起点に補助部材10を容易に除去することができる。また、摩擦攪拌工程において、塑性化領域Wの始端と終端とをオーバーラップさせることにより接合強度を高めることができる。   Moreover, since the slit 10d is provided in the auxiliary member 10, the auxiliary member 10 can be easily removed from the slit 10d as a starting point in the removal process. In the friction stirring step, the joining strength can be increased by overlapping the start and end of the plasticized region W.

[第二実施形態]
次に、第二実施形態に係る接合方法について説明する。本実施形態に係る接合方法では、準備工程と、突合せ工程と、配置工程と、摩擦攪拌工程と、除去工程と、を行う。第二実施形態では、図8に示すように、補助部材20を第二金属部材2側に沿って配置する点で第一実施形態と主に相違する。本実施形態に係る説明では、第一実施形態と相違する部分を中心に説明する。
[Second Embodiment]
Next, the joining method according to the second embodiment will be described. In the joining method according to the present embodiment, a preparation process, a butting process, an arranging process, a friction stirring process, and a removing process are performed. As shown in FIG. 8, the second embodiment is mainly different from the first embodiment in that the auxiliary member 20 is disposed along the second metal member 2 side. In the description according to the present embodiment, the description will focus on parts that are different from the first embodiment.

準備工程は、図8に示すように、第一金属部材1と第二金属部材2と4つの補助部材20とを用意する工程である。補助部材20は、第一金属部材1及び第二金属部材2と同じ材料からなる板状部材である。補助部材20の板厚は、後記する摩擦攪拌工程の後の塑性化領域Wが金属不足にならない程度に適宜設定する。補助部材20の高さは、第二金属部材2の側面2dの高さと略同等になっている。また、補助部材20の長さは、側面2dの長さと略同等になっている。なお、補助部材20は、本実施形態では4つの板状部材で構成しているが、一体形成された枠状部材としてもよい。   The preparation step is a step of preparing the first metal member 1, the second metal member 2, and the four auxiliary members 20, as shown in FIG. The auxiliary member 20 is a plate-like member made of the same material as the first metal member 1 and the second metal member 2. The plate | board thickness of the auxiliary member 20 is suitably set to such an extent that the plasticization area | region W after the friction stirring process mentioned later does not become metal shortage. The height of the auxiliary member 20 is substantially equal to the height of the side surface 2d of the second metal member 2. The length of the auxiliary member 20 is substantially equal to the length of the side surface 2d. In addition, although the auxiliary member 20 is comprised with four plate-shaped members in this embodiment, it is good also as a frame-shaped member formed integrally.

突合せ工程は、第一実施形態と同等であるため説明を省略する。配置工程は、内隅に補助部材20を配置する工程である。図8及び図9に示すように、配置工程では、第二金属部材2の4つの側面2dに、4つの補助部材20をそれぞれ配置する。つまり、配置工程では、第二金属部材2の側面2dと補助部材20の側面20bとを面接触させ、第二金属部材2の外側周面を補助部材20で覆う。補助部材20の端面は、第一金属部材1の表面1bに当接させる。   Since the matching process is the same as that of the first embodiment, description thereof is omitted. An arrangement | positioning process is a process of arrange | positioning the auxiliary member 20 in an inner corner. As shown in FIGS. 8 and 9, in the arranging step, four auxiliary members 20 are arranged on the four side surfaces 2 d of the second metal member 2, respectively. That is, in the arranging step, the side surface 2 d of the second metal member 2 and the side surface 20 b of the auxiliary member 20 are brought into surface contact, and the outer peripheral surface of the second metal member 2 is covered with the auxiliary member 20. The end surface of the auxiliary member 20 is brought into contact with the surface 1 b of the first metal member 1.

摩擦攪拌工程は、図10及び図11に示すように、接合用回転ツールFを用いて第一金属部材1と第二金属部材2との突合せ部J1を摩擦攪拌によって接合する工程である。まず、第一金属部材1の表面1bに設定した開始位置Spに左回転させた接合用回転ツールFの攪拌ピンF2を挿入し、内隅に向けて相対移動させる。そして、攪拌ピンF2が内隅に達したら図11に示すように、接合用回転ツールFの回転中心軸Fcを外側に傾斜させる。そして、傾斜させた状態で接合用回転ツールFを第二金属部材2の周囲に亘って相対移動させて突合せ部J1を摩擦攪拌接合する。接合用回転ツールFの移動軌跡には、塑性化領域Wが形成される。   As shown in FIGS. 10 and 11, the friction stirring step is a step of joining the butted portion J <b> 1 between the first metal member 1 and the second metal member 2 by friction stirring using the welding rotary tool F. First, the stirring pin F2 of the rotating tool for welding F rotated to the left is inserted at the start position Sp set on the surface 1b of the first metal member 1, and is relatively moved toward the inner corner. When the stirring pin F2 reaches the inner corner, the rotation center axis Fc of the joining rotary tool F is inclined outward as shown in FIG. And the rotating tool F for joining is relatively moved over the circumference | surroundings of the 2nd metal member 2 in the inclined state, and the butt | matching part J1 is friction-stir-welded. A plasticized region W is formed in the movement locus of the welding rotary tool F.

摩擦攪拌工程では、突合せ部J1に左回転させた攪拌ピンF2のみを挿入し、被接合金属部材と連結部F1とは離間させつつ相対移動させる。言い換えると、攪拌ピンF2の基端部は露出させた状態で摩擦攪拌接合を行う。そして、第一金属部材1、第二金属部材2及び補助部材20と攪拌ピンF2とを接触させた状態で突合せ部J1に沿って接合用回転ツールFを相対移動させる。   In the friction stirring step, only the stirring pin F2 rotated counterclockwise is inserted into the butting portion J1, and the metal member to be joined and the connecting portion F1 are moved relative to each other while being separated from each other. In other words, the friction stir welding is performed with the base end portion of the stirring pin F2 exposed. And the rotation tool F for joining is relatively moved along the abutting part J1 in the state which made the 1st metal member 1, the 2nd metal member 2, the auxiliary member 20, and the stirring pin F2 contact.

本実施形態では、接合用回転ツールFの進行方向左側に補助部材20が位置するように接合用回転ツールFの進行方向を設定する。また、接合用回転ツールFの回転速度は、Re側にバリVが発生する程度に高速回転させる。攪拌ピンF2の挿入深さは、攪拌ピンF2と突合せ部J1とが接触するように設定すればよい。図10に示すように、接合用回転ツールFを第二金属部材2の周囲に一周させて、塑性化領域Wをオーバーラップさせたら、第一金属部材1の表面1bに設定された終了位置Epで接合用回転ツールFを離脱させる。   In the present embodiment, the traveling direction of the joining rotary tool F is set so that the auxiliary member 20 is positioned on the left side in the traveling direction of the joining rotary tool F. Further, the rotational speed of the joining rotary tool F is rotated at such a high speed that burrs V are generated on the Re side. What is necessary is just to set the insertion depth of the stirring pin F2 so that the stirring pin F2 and the butt | matching part J1 may contact. As shown in FIG. 10, when the joining rotary tool F is made to make a round around the second metal member 2 and the plasticizing region W is overlapped, the end position Ep set on the surface 1 b of the first metal member 1. Then, the joining rotary tool F is detached.

除去工程は、図12に示すように、4つの補助部材20を第二金属部材2から除去する工程である。除去工程では、第二金属部材2の側面2dから離間する方向に補助部材20を折り曲げて、第二金属部材2から補助部材20をそれぞれ除去する。   The removal step is a step of removing the four auxiliary members 20 from the second metal member 2 as shown in FIG. In the removing step, the auxiliary member 20 is bent in a direction away from the side surface 2d of the second metal member 2, and the auxiliary member 20 is removed from the second metal member 2, respectively.

以上説明した本実施形態に係る接合方法によれば、第一金属部材1と第二金属部材2とが接合されるとともに、第一金属部材1及び第二金属部材2に加え、補助部材20も同時に摩擦攪拌接合することにより、接合部(塑性化領域W)の金属不足を防ぐことができる。   According to the joining method according to the present embodiment described above, the first metal member 1 and the second metal member 2 are joined, and in addition to the first metal member 1 and the second metal member 2, the auxiliary member 20 is also used. By performing friction stir welding at the same time, it is possible to prevent metal shortage at the joint (plasticized region W).

また、本実施形態によれば、摩擦攪拌工程によって補助部材20にバリVが形成されるが、除去工程において補助部材20ごと取り除くことができる。これにより、バリVを除去する作業を容易に行うことができる。補助部材20は除去装置等を用いてもよいが、本実施形態では手作業で容易に補助部材20を取り除くことができる。また、本実施形態では、攪拌ピンF2のみを被接合金属部材に接触させるため、回転ツールのショルダ部を接触させる場合に比べて摩擦攪拌装置に作用する負荷を低減することができる。   Moreover, according to this embodiment, although the burr | flash V is formed in the auxiliary member 20 by a friction stirring process, it can remove with the auxiliary member 20 in a removal process. Thereby, the operation | work which removes the burr | flash V can be performed easily. Although the auxiliary member 20 may use a removing device or the like, in the present embodiment, the auxiliary member 20 can be easily removed manually. Moreover, in this embodiment, since only the stirring pin F2 is made to contact with a to-be-joined metal member, the load which acts on a friction stirring apparatus can be reduced compared with the case where the shoulder part of a rotary tool is made to contact.

また、図11に示すように、本実施形態に係る摩擦攪拌工程では接合用回転ツールFの進行方向左側に補助部材20を配置するとともに、接合用回転ツールFを左回転させるため、補助部材20側がRe側となる。本実施形態では、接合用回転ツールFの回転速度を速く設定しているため、Re側即ち補助部材20側にバリVが発生する。つまり、本実施形態ではバリVが補助部材20側に多く形成されるように接合用回転ツールFの回転速度、回転方向及び進行方向等を設定している。これにより、補助部材20に形成されたバリVは、補助部材20ごと除去されるため、バリ除去工程をより容易に行うことができる。また、接合用回転ツールFの回転速度を速く設定することにより、接合用回転ツールFの移動速度(送り速度)を高めることができる。これにより、接合サイクルを短くすることができる。また、本実施形態の配置工程ように、第二金属部材2の側面2dに沿うようにして、内隅に補助部材20を配置してもよい。   In addition, as shown in FIG. 11, in the friction stirring process according to the present embodiment, the auxiliary member 20 is disposed on the left side in the traveling direction of the welding rotary tool F, and the auxiliary member 20 is rotated in the left direction. The side is the Re side. In this embodiment, since the rotational speed of the joining rotary tool F is set to be high, a burr V is generated on the Re side, that is, on the auxiliary member 20 side. That is, in the present embodiment, the rotational speed, the rotational direction, the traveling direction, and the like of the bonding rotary tool F are set so that a large number of burrs V are formed on the auxiliary member 20 side. Thereby, since the burr | flash V formed in the auxiliary member 20 is removed with the auxiliary member 20, the burr | flash removal process can be performed more easily. Moreover, the moving speed (feeding speed) of the joining rotary tool F can be increased by setting the rotational speed of the joining rotary tool F faster. Thereby, a joining cycle can be shortened. Moreover, you may arrange | position the auxiliary member 20 in an inner corner so that the side surface 2d of the 2nd metal member 2 may be followed like the arrangement | positioning process of this embodiment.

[第三実施形態]
次に、第三実施形態に係る接合方法について説明する。本実施形態に係る接合方法では、準備工程と、突合せ工程と、配置工程と、摩擦攪拌工程と、除去工程と、を行う。第三実施形態では、図13に示すように、第二金属部材3が円柱状を呈する点で第一実施形態と主に相違する。
[Third embodiment]
Next, the joining method according to the third embodiment will be described. In the joining method according to the present embodiment, a preparation process, a butting process, an arranging process, a friction stirring process, and a removing process are performed. As shown in FIG. 13, the third embodiment is mainly different from the first embodiment in that the second metal member 3 has a cylindrical shape.

準備工程は、図13に示すように、第一金属部材1と第二金属部材3と補助部材30とを用意する工程である。第二金属部材3は、円柱状を呈する金属部材である。第二金属部材3の材料は、第一金属部材1と同等である。   As shown in FIG. 13, the preparation process is a process of preparing the first metal member 1, the second metal member 3, and the auxiliary member 30. The second metal member 3 is a metal member having a cylindrical shape. The material of the second metal member 3 is the same as that of the first metal member 1.

補助部材30は、薄板状を呈し、かつ、円筒状を呈する金属部材である。補助部材30の材料は、第一金属部材1と同等である。補助部材30の内径は、第二金属部材3の外径と略同等になっている。補助部材30の板厚は、後記する摩擦攪拌工程の際に、塑性化領域Wが金属不足にならない程度に適宜設定する。補助部材30の一部には、高さ方向に連続するスリット30dが形成されている。   The auxiliary member 30 is a metal member having a thin plate shape and a cylindrical shape. The material of the auxiliary member 30 is the same as that of the first metal member 1. The inner diameter of the auxiliary member 30 is substantially equal to the outer diameter of the second metal member 3. The plate | board thickness of the auxiliary member 30 is suitably set to such an extent that the plasticization area | region W does not become metal shortage in the friction stirring process mentioned later. A part of the auxiliary member 30 is formed with a slit 30d continuous in the height direction.

突合せ工程は、第一金属部材1の表面1bと第二金属部材3の端面3cとを突き合わせる工程である。第一金属部材1の表面1bと第二金属部材3の端面3cとを突き合わせることにより、突合せ部J2が形成される。突合せ部J2の平面形状は円形となる。突合せ工程によって、第一金属部材1の表面1bと、第二金属部材3の外周面3dとで内隅が形成される。   The butting process is a process in which the surface 1b of the first metal member 1 and the end surface 3c of the second metal member 3 are butted. By abutting the surface 1b of the first metal member 1 and the end surface 3c of the second metal member 3, a butt portion J2 is formed. The planar shape of the butted portion J2 is a circle. By the butting process, an inner corner is formed by the surface 1 b of the first metal member 1 and the outer peripheral surface 3 d of the second metal member 3.

配置工程は、図14に示すように、内隅に補助部材30を配置する工程である。配置工程では、補助部材30の端面を第一金属部材1の表面1bに当接させつつ、補助部材30の側面30bを第二金属部材3の外周面3dに面接触させる。   The placement step is a step of placing the auxiliary member 30 in the inner corner as shown in FIG. In the arranging step, the side surface 30 b of the auxiliary member 30 is brought into surface contact with the outer peripheral surface 3 d of the second metal member 3 while the end surface of the auxiliary member 30 is in contact with the surface 1 b of the first metal member 1.

摩擦攪拌工程は、具体的な図示は省略するが、接合用回転ツールFを用いて第一金属部材1と第二金属部材3との突合せ部J2を摩擦攪拌によって接合する工程である。摩擦攪拌工程の接合条件は、第二実施形態と同じ要領で、補助部材30にバリが発生するように設定する。摩擦攪拌工程については、第二実施形態の摩擦攪拌工程と略同等であるため、詳細な説明は省略する。   Although a specific illustration is omitted, the friction stirring step is a step of joining the abutting portion J2 between the first metal member 1 and the second metal member 3 by friction stirring using the welding rotary tool F. The joining conditions of the friction stirring step are set so that burrs are generated in the auxiliary member 30 in the same manner as in the second embodiment. The friction stirrer process is substantially the same as the friction stirrer process of the second embodiment, and a detailed description thereof will be omitted.

除去工程は、具体的な図示は省略するが、補助部材30を第二金属部材3から除去する工程である。除去工程では、補助部材30の上端部を第二金属部材3から離間する方向に折り曲げて、第二金属部材3から補助部材30を除去する。また、除去工程では、スリット30dの部分を起点としてめくるようにすると補助部材30を除去しやすい。   Although a specific illustration is omitted, the removal step is a step of removing the auxiliary member 30 from the second metal member 3. In the removing step, the auxiliary member 30 is removed from the second metal member 3 by bending the upper end portion of the auxiliary member 30 in a direction away from the second metal member 3. In the removing step, the auxiliary member 30 can be easily removed by turning the slit 30d as a starting point.

以上説明した第三実施形態に係る接合方法によれば、第二実施形態に係る接合方法と略同等の効果を得ることができる。また、本実施形態に係る接合方法によれば、板状を呈する第一金属部材1と円柱状を呈する第二金属部材3とを接合することができる。また、第一金属部材1及び第二金属部材3に加え、補助部材30を同時に摩擦攪拌することにより接合部(塑性化領域W)の金属不足を防ぐことができる。また、本実施形態に係る除去工程によれば、スリット30dを起点として、補助部材30を容易に除去することができる。   According to the joining method according to the third embodiment described above, substantially the same effect as that of the joining method according to the second embodiment can be obtained. Moreover, according to the joining method which concerns on this embodiment, the 1st metal member 1 which exhibits plate shape, and the 2nd metal member 3 which exhibits columnar shape can be joined. Moreover, in addition to the 1st metal member 1 and the 2nd metal member 3, the metal shortage of a junction part (plasticization area | region W) can be prevented by carrying out friction stirring of the auxiliary member 30 simultaneously. Moreover, according to the removal process which concerns on this embodiment, the auxiliary member 30 can be easily removed starting from the slit 30d.

なお、第三実施形態にかかる接合方法では、例えば、第二金属部材を断面多角形からなる柱状部材としてもよい。また、第一金属部材1の高さ方向に貫通する貫通孔を設けてもよい。この場合の突合せ工程では、第一金属部材1の貫通孔を第二金属部材で覆うように突き合わせる。   In the joining method according to the third embodiment, for example, the second metal member may be a columnar member having a polygonal cross section. Further, a through hole penetrating in the height direction of the first metal member 1 may be provided. In the butting process in this case, butting is performed so that the through hole of the first metal member 1 is covered with the second metal member.

[第四実施形態]
次に、第四実施形態に係る接合方法について説明する。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、配置工程と、摩擦攪拌工程と、除去工程と、を行う。第四実施形態では、図15に示すように、第二金属部材4が円筒状を呈する点で第一実施形態と相違する。
[Fourth embodiment]
Next, the joining method according to the fourth embodiment will be described. In the joining method according to the fourth embodiment, a preparation process, a butting process, an arrangement process, a friction stirring process, and a removal process are performed. As shown in FIG. 15, the fourth embodiment is different from the first embodiment in that the second metal member 4 has a cylindrical shape.

準備工程は、図15に示すように、第一金属部材1と第二金属部材4と補助部材40とを用意する工程である。第一金属部材1の中央には、高さ方向に貫通する貫通孔1eが形成されている。第二金属部材4は、円筒状を呈する金属部材である。補助部材40の材料は、第一金属部材と同等である。第二金属部材4の中空部は、貫通孔1eと連通するようになっている。   The preparation step is a step of preparing the first metal member 1, the second metal member 4, and the auxiliary member 40 as shown in FIG. A through hole 1 e that penetrates in the height direction is formed in the center of the first metal member 1. The second metal member 4 is a metal member having a cylindrical shape. The material of the auxiliary member 40 is equivalent to the first metal member. The hollow part of the second metal member 4 communicates with the through hole 1e.

補助部材40は、中空部41を備えた板状の金属部材である。補助部材40の材料は、第一金属部材1と同等である。中空部41の内径は、第二金属部材4の外径と略同等になっている。補助部材40の板厚は、後記する摩擦攪拌工程の際に、塑性化領域Wが金属不足にならない程度に適宜設定する。補助部材40には、幅方向に連続するスリット40dが形成されている。   The auxiliary member 40 is a plate-like metal member provided with a hollow portion 41. The material of the auxiliary member 40 is the same as that of the first metal member 1. The inner diameter of the hollow portion 41 is substantially the same as the outer diameter of the second metal member 4. The plate | board thickness of the auxiliary member 40 is suitably set to such an extent that the plasticization area | region W does not become metal shortage in the friction stirring process mentioned later. The auxiliary member 40 is formed with a slit 40d continuous in the width direction.

突合せ工程は、図15に示すように、第一金属部材1の表面1bと、第二金属部材4の端面4cとを突き合わせる工程である。第一金属部材1の表面1bと、第二金属部材4の端面4cとを突き合わせることにより、突合せ部J3が形成される。突合せ部J3の平面形状はリング状になる。突合せ工程によって、第一金属部材1の表面1bと、第二金属部材4の外周面4dとで内隅が形成される。   The butting process is a process of butting the surface 1b of the first metal member 1 and the end surface 4c of the second metal member 4 as shown in FIG. The butted portion J3 is formed by butting the surface 1b of the first metal member 1 and the end surface 4c of the second metal member 4. The planar shape of the butting portion J3 is a ring shape. By the butt process, an inner corner is formed by the surface 1b of the first metal member 1 and the outer peripheral surface 4d of the second metal member 4.

配置工程は、図16に示すように、内隅に補助部材40を配置する工程である。配置工程では、補助部材40の裏面40cを第一金属部材1の表面1bに面接触させる。   The placement step is a step of placing the auxiliary member 40 at the inner corner as shown in FIG. In the arranging step, the back surface 40 c of the auxiliary member 40 is brought into surface contact with the front surface 1 b of the first metal member 1.

摩擦攪拌工程は、具体的な図示は省略するが、接合用回転ツールFを用いて第一金属部材1と第二金属部材4との突合せ部J3を摩擦攪拌によって接合する工程である。摩擦攪拌工程の接合条件は、第一実施形態と同じ要領で、補助部材40にバリが発生するように設定する。摩擦攪拌工程については、第一実施形態の摩擦攪拌工程と略同等であるため、詳細な説明は省略する。   Although a specific illustration is omitted, the friction stirring step is a step of joining the butted portion J3 of the first metal member 1 and the second metal member 4 by friction stirring using the welding rotary tool F. The joining conditions of the friction stirring process are set so that burrs are generated in the auxiliary member 40 in the same manner as in the first embodiment. Since the friction stirring process is substantially the same as the friction stirring process of the first embodiment, detailed description thereof is omitted.

除去工程は、具体的な図示は省略するが、補助部材40を第一金属部材1から除去する工程である。除去工程では、補助部材40を第一金属部材1から離間する方向に折り曲げて、第一金属部材1から補助部材40を除去する。また、除去工程では、スリット40dの部分を起点にめくるようにすると除去しやすい。   Although a specific illustration is omitted, the removal step is a step of removing the auxiliary member 40 from the first metal member 1. In the removing step, the auxiliary member 40 is bent in a direction away from the first metal member 1, and the auxiliary member 40 is removed from the first metal member 1. Further, in the removing step, it is easy to remove if the slit 40d is turned around.

以上説明した第四実施形態に係る接合方法によれば、第三実施形態に係る接合方法と略同等の効果を得ることができる。また、本実施形態に係る接合方法によれば、板状を呈する第一金属部材1と円筒状を呈する第二金属部材4とを接合することができる。また、第一金属部材1及び第二金属部材4に加え、補助部材40を同時に摩擦攪拌することにより接合部(塑性化領域W)の金属不足を防ぐことができる。また、本実施形態に係る除去工程によれば、スリット40dを起点として、補助部材40を容易に除去することができる。   According to the joining method according to the fourth embodiment described above, substantially the same effect as that of the joining method according to the third embodiment can be obtained. Moreover, according to the joining method which concerns on this embodiment, the 1st metal member 1 which exhibits plate shape, and the 2nd metal member 4 which exhibits cylindrical shape can be joined. Moreover, in addition to the 1st metal member 1 and the 2nd metal member 4, the auxiliary member 40 can be friction-stirred simultaneously, and the metal shortage of a junction part (plasticization area | region W) can be prevented. Moreover, according to the removal process which concerns on this embodiment, the auxiliary member 40 can be easily removed starting from the slit 40d.

なお、第四実施形態にかかる接合方法では、第二金属部材4を円筒状としたが、例えば、他の断面を呈する筒状部材としてもよい。また、第一金属部材1の貫通孔1eを設けないようにしてもよい。   In addition, in the joining method concerning 4th embodiment, although the 2nd metal member 4 was made into cylindrical shape, it is good also as a cylindrical member which exhibits another cross section, for example. Further, the through hole 1e of the first metal member 1 may not be provided.

また、上記の実施形態では、接合用回転ツールFに対して片側にのみ補助部材を配置したが、接合用回転ツールFの両側に補助部材を配置してもよい。この場合の除去工程では、接合用回転ツールFの両側に配置された補助部材を除去する。つまり、本発明の除去工程では、第一金属部材1及び第二金属部材2の少なくとも一方から補助部材を除去すればよい。また、第一実施形態及び第二実施形態の配置工程では、第一金属部材1の表面1b(露出部)の全部又は第二金属部材2の側面2dの全部を補助部材10,20でそれぞれ覆うようにしているが、少なくとも一部を覆うようにしてもよい。   In the above embodiment, the auxiliary member is arranged only on one side with respect to the joining rotary tool F. However, the auxiliary member may be arranged on both sides of the joining rotary tool F. In the removing step in this case, the auxiliary members arranged on both sides of the joining rotary tool F are removed. That is, in the removing step of the present invention, the auxiliary member may be removed from at least one of the first metal member 1 and the second metal member 2. Moreover, in the arrangement | positioning process of 1st embodiment and 2nd embodiment, the whole surface 1b (exposed part) of the 1st metal member 1 or all the side surfaces 2d of the 2nd metal member 2 are each covered with the auxiliary members 10 and 20. However, you may make it cover at least one part.

1 第一金属部材
2 第二金属部材
10 補助部材
F 接合用回転ツール(回転ツール)
F1 連結部
F2 攪拌ピン
J1 突合せ部
V バリ
W 塑性化領域
DESCRIPTION OF SYMBOLS 1 1st metal member 2 2nd metal member 10 Auxiliary member F Rotary tool for joining (rotary tool)
F1 connecting part F2 stirring pin J1 butt part V burr W plasticizing region

Claims (8)

攪拌ピンを備えた回転ツールを用いて、突き合わされる面の形状が互いに異なる二つの金属部材を接合する接合方法であって、
一方の前記金属部材と他方の前記金属部材とを突き合わせて突合せ部を形成する突合せ工程と、
他方の前記金属部材の周方向に亘って、前記金属部材同士の内隅に補助部材を配置する配置工程と、
回転した前記攪拌ピンを前記内隅に挿入し、前記攪拌ピンのみを前記金属部材同士及び前記補助部材に接触させた状態で、他方の前記金属部材の周方向に亘って前記突合せ部の摩擦攪拌を行う摩擦攪拌工程と、
前記補助部材を一方の前記金属部材及び他方の前記金属部材の少なくとも一方から除去する除去工程と、を含むことを特徴とする接合方法。
Using a rotary tool equipped with a stirring pin, a joining method for joining two metal members having different shapes of surfaces to be abutted with each other,
A butting step of butting one metal member and the other metal member to form a butting portion;
An arrangement step of arranging an auxiliary member at an inner corner between the metal members over the circumferential direction of the other metal member;
The rotated stirring pin is inserted into the inner corner, and only the stirring pin is in contact with the metal members and the auxiliary member, and the friction stir of the butted portion is performed over the circumferential direction of the other metal member. A friction stirring step,
And a removing step of removing the auxiliary member from at least one of the one metal member and the other metal member.
前記摩擦攪拌工程では、摩擦攪拌で発生するバリが前記補助部材に形成されるように、接合条件を設定することを特徴とする請求項1に記載の接合方法。   The joining method according to claim 1, wherein in the friction stirring step, joining conditions are set so that burrs generated by friction stirring are formed on the auxiliary member. 前記金属部材は、いずれも板状を呈し、
前記突合せ工程では、一方の前記金属部材の表面と他方の前記金属部材の裏面とを突き合わせることを特徴とする請求項1又は請求項2に記載の接合方法。
Each of the metal members has a plate shape,
The joining method according to claim 1 or 2, wherein, in the abutting step, a surface of one of the metal members and a back surface of the other metal member are abutted.
一方の前記金属部材は、板状を呈し、
他方の前記金属部材は、円柱状を呈し、
前記突合せ工程では、一方の前記金属部材の表面と他方の金属部材の端面とを突き合わせることを特徴とする請求項1又は請求項2に記載の接合方法。
One of the metal members has a plate shape,
The other metal member has a cylindrical shape,
3. The joining method according to claim 1, wherein, in the abutting step, a surface of one of the metal members and an end surface of the other metal member are abutted.
一方の前記金属部材は、板状を呈し、
他方の前記金属部材は、筒状を呈し、
前記突合せ工程では、一方の前記金属部材の表面と他方の金属部材の端面とを突き合わせることを特徴とする請求項1又は請求項2に記載の接合方法。
One of the metal members has a plate shape,
The other metal member has a cylindrical shape,
3. The joining method according to claim 1, wherein, in the abutting step, a surface of one of the metal members and an end surface of the other metal member are abutted.
一方の前記金属部材は、板状を呈し、
他方の前記金属部材は、円筒状を呈し、
前記突合せ工程では、一方の前記金属部材の表面と他方の金属部材の端面とを突き合わせることを特徴とする請求項1又は請求項2に記載の接合方法。
One of the metal members has a plate shape,
The other metal member has a cylindrical shape,
3. The joining method according to claim 1, wherein, in the abutting step, a surface of one of the metal members and an end surface of the other metal member are abutted.
一方の前記金属部材に貫通孔が形成されており、
前記突合せ工程では、前記貫通孔を他方の前記金属部材で覆うことを特徴とする請求項1乃至請求項4のいずれか一項に記載の接合方法。
A through hole is formed in one of the metal members,
5. The joining method according to claim 1, wherein in the butting step, the through hole is covered with the other metal member.
一方の前記金属部材に貫通孔が形成されており、
前記突合せ工程では、前記貫通孔と他方の前記金属部材の中空部とを連通させることを特徴とする請求項5又は請求項6に記載の接合方法。
A through hole is formed in one of the metal members,
The joining method according to claim 5 or 6, wherein, in the abutting step, the through hole and the hollow portion of the other metal member are communicated with each other.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004074238A (en) * 2002-08-20 2004-03-11 Kawasaki Heavy Ind Ltd Apparatus for friction stirring joining
WO2015114975A1 (en) * 2014-01-28 2015-08-06 日本軽金属株式会社 Friction stir welding method
JP2015213928A (en) * 2014-05-08 2015-12-03 日本軽金属株式会社 Friction-agitation joint method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004074238A (en) * 2002-08-20 2004-03-11 Kawasaki Heavy Ind Ltd Apparatus for friction stirring joining
WO2015114975A1 (en) * 2014-01-28 2015-08-06 日本軽金属株式会社 Friction stir welding method
JP2015213928A (en) * 2014-05-08 2015-12-03 日本軽金属株式会社 Friction-agitation joint method

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