JP2018176205A

JP2018176205A - Joining method

Info

Publication number: JP2018176205A
Application number: JP2017077714A
Authority: JP
Inventors: 堀　久司; Hisashi Hori; 久司堀; 伸城瀬尾; Nobushiro Seo
Original assignee: Nippon Light Metal Co Ltd
Current assignee: Nippon Light Metal Co Ltd
Priority date: 2017-04-10
Filing date: 2017-04-10
Publication date: 2018-11-15
Anticipated expiration: 2037-04-10
Also published as: JP6747365B2

Abstract

PROBLEM TO BE SOLVED: To provide a joining method that can prevent shortage of metal of a joining part.SOLUTION: In a joining method, an auxiliary member arrangement step in which a back side 30a of an auxiliary member 30 is brought into surface-contact with a lateral plate 23 of a second metal member 20 so as to cover a butting part J1 constituted of a side face 10a of a first metal member 10 and a base end part 22 of the second metal member 20, is performed. After the auxiliary member arrangement step, a stirring pin F2 is inserted from a front surface side of the auxiliary member 30, and a rotary tool F is relatively moved along the butting part J1, in a state that only the stirring pin F2 is brought into contact with the auxiliary member 30, the first metal member 10 and the second metal member 20, so that the auxiliary member 30, the first metal member 10 and the second metal member 20 are subjected to friction stir welding.SELECTED DRAWING: Figure 7

Description

本発明は、金属部材同士を摩擦攪拌接合する接合方法に関する。 The present invention relates to a bonding method of friction stir welding metal members.

例えば、特許文献１には、第一金属部材と第二金属部材とを摩擦攪拌で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て突合せ部を形成した後に、回転ツールの攪拌ピンのみを第一金属部材と第二金属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 bonding method of bonding a first metal member and a second metal member by friction stirring. In the joining method, after the first metal member and the second metal member are butted to form a butt portion, only the stirring pin of the rotary tool is brought into contact with the first metal member and the second metal member. In contrast, friction stirring is performed.

特開２０１３−０３９６１３号公報JP, 2013-039613, A

しかしながら、前記した従来の接合方法では、塑性流動化した金属を回転ツールのショルダ部で押さえないため、塑性流動化した金属が外部に漏れ出して接合部が金属不足になるという問題がある。 However, in the conventional bonding method described above, since the plastically fluidized metal is not held by the shoulder portion of the rotary tool, there is a problem that the plastically fluidized metal leaks to the outside and the welded portion becomes insufficient in metal.

そこで、本発明は、接合部の金属不足を防ぐ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 prevent metal deficiency of a junction part.

本発明は、攪拌ピンを備えた本接合用回転ツールを用いて第一金属部材と第二金属部材とを摩擦攪拌接合で接合する接合方法であって、前記第一金属部材は、板状を呈し、前記第二金属部材は、縦板の一方の側面側の基端部から横板が突出した断面Ｌ字形状に形成されており、前記第一金属部材の側面と前記第二金属部材の前記縦板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、前記突合せ工程後、前記第一金属部材の側面と前記第二金属部材の前記基端部とで構成される前記突合せ部を覆うように、前記第二金属部材の横板に補助部材の裏面を面接触させる補助部材配置工程と、前記補助部材配置工程後、前記攪拌ピンを前記補助部材の表面側から挿入し、前記攪拌ピンのみを前記補助部材、前記第一金属部材およ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本接合用回転ツールを相対移動させて、前記補助部材、前記第一金属部材および前記第二金属部材の摩擦攪拌接合を行う本接合工程と、前記本接合工程後、バリが形成された前記補助部材を前記第二金属部材から除去する除去工程とを含むことを特徴とする。
別の本発明は、攪拌ピンを備えた本接合用回転ツールを用いて第一金属部材と第二金属部材とを摩擦攪拌接合で接合する接合方法であって、前記第一金属部材は、板状を呈し、前記第二金属部材は、縦板の一方の側面側の基端部から横板が突出した断面Ｌ字形状に形成されており、前記第一金属部材の側面と前記第二金属部材の前記縦板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、前記突合せ工程後、前記第一金属部材の側面と前記第二金属部材の前記基端部とで構成される前記突合せ部を覆うように、前記第一金属部材の前記側面に補助部材の裏面を面接触させる補助部材配置工程と、前記補助部材配置工程後、前記攪拌ピンを前記補助部材の表面側から挿入し、前記攪拌ピンのみを前記補助部材、前記第一金属部材およ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本接合用回転ツールを相対移動させて、前記補助部材、前記第一金属部材および前記第二金属部材の摩擦攪拌接合を行う本接合工程と、前記本接合工程後、バリが形成された前記補助部材を前記第一金属部材から除去する除去工程とを含むことを特徴とする。 The present invention is a joining method of joining a first metal member and a second metal member by friction stir welding using a rotary tool for main joining provided with a stirring pin, wherein the first metal member has a plate shape. The second metal member is formed in an L-shaped cross section in which a horizontal plate protrudes from a base end on one side of a vertical plate, and the side surface of the first metal member and the second metal member The butt process comprising butting step of butting the other side surface of the longitudinal plate to form a butt portion, and the side surface of the first metal member and the base end portion of the second metal member after the butting step An auxiliary member disposing step of bringing the back surface of the auxiliary member into surface contact with the lateral plate of the second metal member so as to cover the portion; and after the auxiliary member disposing step, inserting the stirring pin from the surface side of the auxiliary member; Only the stirring pin is used as the auxiliary member, the first metal member and the front. In the state of being in contact with the second metal member, the rotation tool for main bonding is relatively moved along the butting portion to perform friction stir welding of the auxiliary member, the first metal member, and the second metal member. It is characterized by including a main bonding step and a removal step of removing the auxiliary member on which the burr is formed from the second metal member after the main bonding step.
Another invention of the present invention is a joining method of joining a first metal member and a second metal member by friction stir welding using a rotating tool for main welding provided with a stirring pin, wherein the first metal member is a plate The second metal member is formed in an L-shaped cross section in which a horizontal plate protrudes from a base end on one side of the vertical plate, and the side surface of the first metal member and the second metal Abutment step of butting the member to the other side of the longitudinal plate to form a butt portion, and after the buttling step, the side portion of the first metal member and the base end portion of the second metal member The auxiliary member disposing step of bringing the back surface of the auxiliary member into surface contact with the side surface of the first metal member so as to cover the butting portion, and inserting the stirring pin from the surface side of the auxiliary member after the auxiliary member disposing step , Only the stirring pin is the auxiliary member, the first metal member And in the state of being in contact with the second metal member, the rotation tool for the main bonding is relatively moved along the butting portion, and friction stir welding of the auxiliary member, the first metal member, and the second metal member is performed. And a removing step of removing the auxiliary member on which the burr is formed from the first metal member after the main bonding step.

前記の各発明によれば、第一金属部材と第二金属部材とが接合されるとともに、第一金属部材および第二金属部材に加えて、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。 According to each of the above-described inventions, the first metal member and the second metal member are joined, and in addition to the first metal member and the second metal member, the auxiliary member is also subjected to the friction stir welding at the same time. It is possible to prevent the shortage of metals.

また、摩擦攪拌接合で発生するバリを補助部材ごと金属部材から除去することができるため、バリを除去する工程が容易となる。 Further, since the burrs generated in the friction stir welding can be removed from the metal member together with the auxiliary member, the process of removing the burrs becomes easy.

前記補助部材配置工程の前に、前記第一金属部材の側面と前記第二金属部材の基端部とで構成される前記突合せ部に仮接合用回転ツールの攪拌ピンのみを挿入して摩擦攪拌接合によるスポット接合を行う仮接合工程を含むことが好ましい。 Prior to the auxiliary member disposing step, only the stirring pin of the rotating tool for temporary bonding is inserted into the abutment portion constituted by the side surface of the first metal member and the base end portion of the second metal member to perform friction stirring It is preferable to include a temporary bonding step of performing spot bonding by bonding.

前記補助部材配置工程の前に、前記第一金属部材の先端と前記第二金属部材の縦板の先端とで構成される前記突合せ部に仮接合用回転ツールの攪拌ピンのみを挿入して摩擦攪拌接合によるスポット接合を行う仮接合工程を含むことが好ましい。 Prior to the auxiliary member disposing step, only the stirring pin of the rotating tool for temporary bonding is inserted into the abutment portion constituted by the tip of the first metal member and the tip of the vertical plate of the second metal member to perform friction It is preferable to include the temporary joining process which performs spot joining by stirring joining.

かかる接合方法によれば、攪拌ピンのみを金属部材に接触させた状態で突合せ部のスポット仮付けを行うことにより、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、従来のように突合せ部の全長に対して仮接合を行う場合に比べて工程時間を短くすることができる。 According to this joining method, the load acting on the friction stirring device can be reduced by performing spot tacking of the butting portion in a state where only the stirring pin is in contact with the metal member. In addition, the process time can be shortened as compared with the case where the temporary bonding is performed on the entire length of the butt joint portion as in the prior art.

この場合に、前記仮接合用回転ツールおよび前記本接合用回転ツールは同一の回転ツールであることが好ましい。係る接合方法によれば、回転ツールの交換を行う必要がないため、作業効率を高めることができる。 In this case, it is preferable that the temporary joining rotating tool and the main joining rotating tool be the same rotating tool. According to the joining method, it is not necessary to replace the rotating tool, so that the working efficiency can be enhanced.

前記補助部材配置工程の前に、前記第一金属部材の側面と前記第二金属部材の基端部とで構成される前記突合せ部に溶接によるスポット接合をする仮接合工程を含むことが好ましい。この場合に、前記溶接は、ＭＩＧ溶接、ＴＩＧ溶接またはレーザ溶接であることが好ましい。 It is preferable to include the temporary joining process which performs spot joining by welding in the said butt | matching part comprised by the side of the said 1st metal member, and the base end part of the said 2nd metal member before the said auxiliary member arrangement | positioning process. In this case, the welding is preferably MIG welding, TIG welding or laser welding.

前記補助部材配置工程の前に、前記第一金属部材の先端と前記第二金属部材の縦板の先端とで構成される前記突合せ部に溶接によるスポット接合をする仮接合工程を含むことが好ましい。この場合に、前記溶接は、ＭＩＧ溶接、ＴＩＧ溶接またはレーザ溶接であることが好ましい。
かかる接合方法によれば、従来のように突合せ部の全長に対して仮接合を行う場合に比べて工程時間を短くすることができる。 It is preferable to include a temporary joining step of performing spot bonding by welding on the butting portion constituted by the tip of the first metal member and the tip of the vertical plate of the second metal member before the auxiliary member disposing step. . In this case, the welding is preferably MIG welding, TIG welding or laser welding.
According to this bonding method, the process time can be shortened as compared with the case where the temporary bonding is performed with respect to the entire length of the butting portion as in the related art.

本発明によれば、接合部の金属不足を防ぐことができる接合方法を提供することができる。 According to the present invention, it is possible to provide a bonding method capable of preventing metal deficiency of a bonding portion.

本発明の第一実施形態に係る接合方法の突合せ工程について説明する第一金属部材および第二金属部材の斜視図である。It is a perspective view of the 1st metallic member and the 2nd metallic member explaining the butt fit process of the joining method concerning a first embodiment of the present invention. 本発明の第一実施形態に係る接合方法の突合せ工程について説明する第一金属部材と第二金属部材とを突き合わせた状態の縦断面図である。It is a longitudinal cross-sectional view of the state which contact | abutted the 1st metal member and 2nd metal member which demonstrate the butt | matching process of the joining method which concerns on 1st embodiment of this invention. 本発明の第一実施形態に係る接合方法の仮接合工程について説明する斜視図である。It is a perspective view explaining the temporary joining process of the joining method concerning a first embodiment of the present invention. 本発明の第一実施形態に係る接合方法の仮接合工程について説明する斜視図である。It is a perspective view explaining the temporary joining process of the joining method concerning a first embodiment of the present invention. 本発明の第一実施形態に係る接合方法の補助部材配置工程について説明する斜視図である。It is a perspective view explaining the auxiliary member arrangement process of the joining method concerning a first embodiment of the present invention. 本発明の第一実施形態に係る接合方法の補助部材配置工程について説明する縦断面図である。It is a longitudinal cross-sectional view explaining the auxiliary member arrangement process of the joining method concerning a first embodiment of the present invention. 本発明の第一実施形態に係る接合方法の本接合工程について説明する斜視図である。It is a perspective view explaining the main joining process of the joining method concerning a first embodiment of the present invention. 本発明の第一実施形態に係る接合方法の本接合工程について説明する縦断面図である。It is a longitudinal cross-sectional view explaining the main joining process of the joining method concerning a first embodiment of the present invention. 本発明の第一実施形態に係る接合方法の除去工程について説明する縦断面図である。It is a longitudinal cross-sectional view explaining the removal process of the joining method concerning a first embodiment of the present invention. 本発明の第二実施形態に係る接合方法の補助部材配置工程について説明する斜視図である。It is a perspective view explaining the auxiliary member arrangement process of the joining method concerning a second embodiment of the present invention. 本発明の第二実施形態に係る接合方法の補助部材配置工程について説明する縦断面図である。It is a longitudinal cross-sectional view explaining the auxiliary member arrangement process of the joining method concerning a second embodiment of the present invention. 本発明の第二実施形態に係る接合方法の本接合工程について説明する斜視図である。It is a perspective view explaining the main joining process of the joining method concerning a second embodiment of the present invention. 本発明の第三実施形態に係る接合方法の仮接合工程について説明する斜視図である。It is a perspective view explaining the temporary joining process of the joining method concerning a third embodiment of the present invention. 本発明の第三実施形態に係る接合方法の仮接合工程について説明する斜視図である。It is a perspective view explaining the temporary joining process of the joining method concerning a third embodiment of the present invention.

［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１〜図９を参照して詳細に説明する。第一実施形態では、板状の第一金属部材と断面Ｌ字状の第二金属部材とを接合する。第一実施形態に係る接合方法では、突合せ工程と、仮接合工程と、補助部材配置工程と、本接合工程と、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
The bonding method according to the first embodiment of the present invention will be described in detail with reference to FIGS. In the first embodiment, a plate-shaped first metal member and a second metal member having an L-shaped cross section are joined. In the bonding method according to the first embodiment, a butt step, a temporary bonding step, an auxiliary member disposing step, a main bonding step, and a removing step are performed. In the following description, "surface" means a surface opposite to "back side".

突合せ工程は、図１に示すように、板状の第一金属部材１０と断面Ｌ字状の第二金属部材２０とを突き合わせる工程である。
第一金属部材１０および第二金属部材２０の材料は、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の摩擦攪拌可能な金属から適宜選択される。 The butting step is a step of butting the plate-like first metal member 10 and the second metal member 20 having an L-shaped cross section as shown in FIG.
The material of the first metal member 10 and the second metal member 20 is appropriately selected from, for example, friction stirtable metals such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy.

第一金属部材１０は、例えば矩形状の平板形状をしている。第一金属部材１０は他の形状の板材としてもよい。
第二金属部材２０は、軸断面がＬ字形状に形成された形材である。第二金属部材２０は、縦板２１と、縦板２１における一方の側面２１ａ側の基端部２２から一方に向けて突出した横板２３とによって構成されている。すなわち、縦板２１の基端部２２（図１における縦板２１の上端部側）から一方に向けて横板２３が直角に屈曲している。 The first metal member 10 has, for example, a rectangular flat plate shape. The first metal member 10 may be a plate of another shape.
The second metal member 20 is a member having an L-shaped axial cross section. The second metal member 20 is constituted by a vertical plate 21 and a horizontal plate 23 projecting from the base end 22 on the side surface 21 a side of the vertical plate 21 toward one side. That is, the horizontal plate 23 is bent at a right angle from the base end portion 22 of the vertical plate 21 (the upper end portion side of the vertical plate 21 in FIG. 1) toward one side.

縦板２１と横板２３との接続部には、図２に示すように、直角に屈曲した角部２４が形成されている。角部２４の外側の頂部には、円弧状に湾曲した曲面が形成されている。
なお、第一実施形態の第二金属部材２０では、縦板２１の高さと、横板２３の横幅とが同じ長さに形成されているが異なる長さに形成してもよい。
突合せ工程によって、第一金属部材１０の両側面１０ａ，１０ｂのうち、側面１０ａと、第二金属部材２０の縦板２１における他方の側面２１ｂとが面接触するように突き合わされる。 As shown in FIG. 2, a corner 24 bent at a right angle is formed at the connection between the vertical plate 21 and the horizontal plate 23. A curved surface curved in an arc shape is formed at an outer top of the corner 24.
In the second metal member 20 of the first embodiment, the height of the vertical plate 21 and the horizontal width of the horizontal plate 23 are formed to have the same length, but may be formed to different lengths.
In the butting step, the side surface 10a of the both side surfaces 10a and 10b of the first metal member 10 and the other side surface 21b of the vertical plate 21 of the second metal member 20 are abutted so as to be in surface contact.

この例では、第一金属部材１０と第二金属部材２０の長さ（奥行き寸法）は等しいので、第一金属部材１０の横側の端面１０ｃと、第二金属部材２０の横側の端面２５ａとが面一になり、同じく端面１０ｄと、端面２５ｂとが面一になるように揃える。さらに、第一金属部材１０の下側の端面１０ｅと、第二金属部材２０における縦板２１の下側の端面２１ｃとが面一になるように揃える。なお、第一金属部材１０と第二金属部材２０の長さ（奥行き寸法）は等しくなくてもよい。 In this example, since the lengths (depth dimensions) of the first metal member 10 and the second metal member 20 are equal, the lateral end face 10 c of the first metal member 10 and the lateral end face 25 a of the second metal member 20 And the end face 10d and the end face 25b are flush with each other. Further, the lower end surface 10 e of the first metal member 10 and the lower end surface 21 c of the vertical plate 21 of the second metal member 20 are aligned to be flush with each other. In addition, the length (depth dimension) of the 1st metal member 10 and the 2nd metal member 20 does not need to be equal.

図２は、このようにして突き合わされた第一金属部材１０と第二金属部材２０の縦断面図である。第一金属部材１０の側面１０ａと第二金属部材２０の基端部２２とにより、突合せ部Ｊ１が形成される。 FIG. 2 is a longitudinal cross-sectional view of the first metal member 10 and the second metal member 20 thus butted. A butt portion J <b> 1 is formed by the side surface 10 a of the first metal member 10 and the base end portion 22 of the second metal member 20.

このとき、角部２４の外側の頂部には、円弧状に湾曲した曲面が形成されているため、第一金属部材１０の側面１０ａと第二金属部材２０の角部２４との間には、略Ｖ字形状の隙間Ｓが形成される。
また、第一金属部材１０の端面１０ｅと第二金属部材２０の縦板２１の端面２１ｃとによって、突合せ部Ｊ２が形成される。 At this time, since a curved surface curved in an arc shape is formed at the top of the outside of the corner 24, between the side surface 10 a of the first metal member 10 and the corner 24 of the second metal member 20, A substantially V-shaped gap S is formed.
Further, a butt portion J2 is formed by the end face 10e of the first metal member 10 and the end face 21c of the vertical plate 21 of the second metal member 20.

突合せ工程後、仮接合工程を行う。仮接合工程は、図３、図４に示すように、回転ツール（仮接合用回転ツール）Ｆを用いて突合せ部Ｊ１，Ｊ２に対して仮接合を行う工程である。
回転ツールＦは、例えば工具鋼で形成されている。回転ツールＦは、連結部Ｆ１と攪拌ピンＦ２とを備えている。連結部Ｆ１は、摩擦攪拌装置の回転軸に連結される部位である。連結部Ｆ１は円柱状を呈する。 After the joining step, a temporary joining step is performed. A temporary joining process is a process of performing temporary joining with respect to butting part J1, J2 using rotation tool (rotation tool for temporary joining) F, as shown to FIG. 3, FIG.
The rotating tool F is formed of, for example, a tool steel. The rotating tool F includes a connecting portion F1 and a stirring pin F2. The connection portion F1 is a portion connected to the rotation shaft of the friction stir device. The connecting portion F1 has a cylindrical shape.

攪拌ピンＦ２は、連結部Ｆ１から延在しており、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。第一実施形態では、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。 The stirring pin F2 extends from the connecting portion F1 and is coaxial with the connecting portion F1. The stirring pin F2 is tapered as it separates from the connecting portion F1. A spiral groove is engraved on the outer peripheral surface of the stirring pin F2. In the first embodiment, in order to rotate the rotation tool F to the right, the spiral groove is formed in a counterclockwise direction from the proximal end to the distal end.

なお、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。
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、第一金属部材１０および第二金属部材２０の外部に溢れ出る金属の量を少なくすることができる。なお、螺旋溝は省略してもよい。 In addition, when rotating the rotation tool F to the left, it is preferable to form a spiral groove rightward as it goes to a tip from a base end.
By setting the spiral groove in this manner, the plastically fluidized metal is guided to the tip side of the stirring pin F2 by the spiral groove during friction stirring. As a result, the amount of metal overflowing to the outside of the first metal member 10 and the second metal member 20 can be reduced. The spiral groove may be omitted.

図３に示す突合せ部Ｊ２の仮接合工程では、回転させた回転ツールＦの攪拌ピンＦ２のみを先端側の突合せ部Ｊ２に接触させてスポット接合を行う。この工程では、所定の間隔をあけて攪拌ピンＦ２のみを先端側の突合せ部Ｊ２に浅く押し込んでいく。そして、攪拌ピンＦ２のみを第一金属部材１０および第二金属部材２０に接触させる。これにより攪拌ピンＦ２の押し込み跡には、塑性化領域Ｗ０が形成される。 In the temporary joining process of the butt joint J2 shown in FIG. 3, only the stirring pin F2 of the rotated rotating tool F is brought into contact with the butt joint J2 on the tip side to perform spot joining. In this step, only the stirring pin F2 is shallowly pushed into the butt joint portion J2 on the tip side at predetermined intervals. Then, only the stirring pin F2 is brought into contact with the first metal member 10 and the second metal member 20. Thereby, the plasticization area W0 is formed in the pressing mark of the stirring pin F2.

回転ツールＦは、先端にスピンドルユニット等の回転駆動手段を備えたアームロボット（図示せず）に取り付けられることが好ましい。これにより、容易にスポット接合を行うことができる。
図４に示す突合せ部Ｊ１の仮接合工程は、回転ツールＦ（仮接合用回転ツール）を用いて突合せ部Ｊ１に対して仮接合を行う工程である。 The rotary tool F is preferably attached to an arm robot (not shown) having a rotary drive means such as a spindle unit at its tip. Thereby, spot bonding can be easily performed.
The temporary joining process of the butt joint portion J1 shown in FIG. 4 is a step of temporarily joining the butt joint portion J1 using a rotary tool F (rotational tool for temporary joining).

この工程では、第一金属部材１０および第二金属部材２０を図３の状態から相対的に上下反転させ、回転ツールＦによって突合せ部Ｊ１にスポット接合を行う。この工程では、突合せ部Ｊ２の仮接合工程と同様に、所定の間隔をあけて攪拌ピンＦ２のみを基端側の突合せ部Ｊ１に浅く押し込んでいくことにより、塑性化領域Ｗ０が形成される。 In this step, the first metal member 10 and the second metal member 20 are relatively turned upside down from the state of FIG. 3, and spot bonding is performed on the butt joint portion J1 by the rotary tool F. In this process, similarly to the temporary joining process of the butt joint J2, the plasticizing region W0 is formed by pressing only the stirring pin F2 shallowly into the butt joint J1 on the base end side at predetermined intervals.

仮接合工程後、補助部材配置工程を行う。補助部材配置工程は、図５、図６に示すように、突合せ部Ｊ１を覆うように、第一金属部材１０および第二金属部材２０に補助部材３０を配置する工程である。
補助部材３０は金属製の板状部材である。補助部材３０は摩擦攪拌可能な金属であれば特に制限されないが、第一実施形態では、第一金属部材１０および第二金属部材２０と同じ材料になっている。 After the temporary bonding step, the auxiliary member arranging step is performed. The auxiliary member arranging step is a step of arranging the auxiliary member 30 on the first metal member 10 and the second metal member 20 so as to cover the butt portion J1, as shown in FIGS.
The auxiliary member 30 is a plate member made of metal. The auxiliary member 30 is not particularly limited as long as it is a friction stir metal, but in the first embodiment, the auxiliary member 30 is made of the same material as the first metal member 10 and the second metal member 20.

補助部材３０の板厚は、後記する本接合工程後に、塑性化領域Ｗが金属不足ならないとともに、基端側の突合せ部Ｊ１の隙間Ｓが金属によって埋まるように適宜設定する。第一実施形態では、補助部材３０の板厚は第一金属部材１０および第二金属部材２０の板厚よりも薄く設定している。 The thickness of the auxiliary member 30 is appropriately set so that the plasticized region W does not run short of metal and the gap S of the abutment portion J1 on the base end side is filled with metal after the main bonding step described later. In the first embodiment, the thickness of the auxiliary member 30 is set smaller than the thickness of the first metal member 10 and the second metal member 20.

補助部材３０の配置方法は、第一金属部材１０の側面１０ａと第二金属部材２０の基端部２２とで構成される突合せ部Ｊ１を覆うように、第二金属部材２０の横板２３に補助部材３０の裏面３０ａを面接触させて、第一金属部材１０の側面１０ａに補助部材３０の端面３０ｂを突き合わせる。 The arrangement method of the auxiliary member 30 is such that the lateral plate 23 of the second metal member 20 is covered so as to cover the butt portion J1 constituted by the side surface 10a of the first metal member 10 and the base end 22 of the second metal member 20. By bringing the back surface 30 a of the auxiliary member 30 into surface contact, the end surface 30 b of the auxiliary member 30 is abutted against the side surface 10 a of the first metal member 10.

また、第一金属部材１０、第二金属部材２０および補助部材３０を治具（図示せず）によって移動不能に拘束する。なお、第一実施形態では、補助部材３０は板状としているが、他の形状であってもよい。 Further, the first metal member 10, the second metal member 20, and the auxiliary member 30 are movably restrained by a jig (not shown). In addition, in 1st embodiment, although the auxiliary member 30 is made into plate shape, another shape may be sufficient.

補助部材配置工程後、本接合工程を行う。本接合工程は、図７、図８に示すように、回転ツールＦ（本接合用回転ツール）を用いて基端側の突合せ部Ｊ１に対して摩擦攪拌接合を行う工程である。ここで、本接合用回転ツールは前記の仮接合用回転ツールと共用するのが好ましい。すなわち、本実施形態では、本接合用回転ツールおよび仮接合用回転ツールは、同じ回転ツールＦを使用している。 After the auxiliary member disposing step, the main joining step is performed. As shown in FIGS. 7 and 8, the main bonding step is a step of performing friction stir welding on the butt portion J1 on the proximal end side using a rotary tool F (a rotary tool for main bonding). Here, it is preferable to share the rotating tool for actual bonding with the above-described rotating tool for temporary bonding. That is, in the present embodiment, the rotating tool for temporary bonding and the rotating tool for temporary bonding use the same rotating tool F.

攪拌ピンＦ２の外周面には螺旋溝が刻まれている。本実施形態では、回転ツールＦを右回転させるため、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。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１０、第二金属部材２０および補助部材３０）の外部に溢れ出る金属の量を少なくすることができる。回転ツールＦは、例えば、先端にスピンドルユニット等の回転駆動手段を備えたアームロボットに取り付けられる。アームロボットに取り付けることにより、回転ツールＦの回転中心軸の傾斜角度を容易に変更することができる。 Spiral grooves are formed on the outer peripheral surface of the stirring pin F2. In the present embodiment, in order to rotate the rotation tool F to the right, the spiral groove is formed in the counterclockwise direction from the proximal end toward the distal end. By setting the spiral groove in this manner, the plastically fluidized metal is guided to the tip side of the stirring pin F2 by the spiral groove during friction stirring. As a result, the amount of metal overflowing to the outside of the joined metal members (the first metal member 10, the second metal member 20, and the auxiliary member 30) can be reduced. The rotation tool F is attached to, for example, an arm robot provided with a rotation drive means such as a spindle unit at its tip. By attaching to the arm robot, the inclination angle of the rotation center axis of the rotating tool F can be easily changed.

突合せ部Ｊ１の摩擦攪拌接合では、第一金属部材１０の側面１０ａと補助部材３０の端面３０ｂとが当接する部分に設定した開始位置Ｓｐに、右回転させた攪拌ピンＦ２を挿入し、突合せ部Ｊ１に沿って回転ツールＦを相対移動させる。つまり、攪拌ピンＦ２の基端側は露出させた状態で、攪拌ピンＦ２のみを第一金属部材１０、第二金属部材２０、補助部材３０に接触させて摩擦攪拌を行う。また、回転ツールＦの右側に補助部材３０が位置するように回転ツールＦの進行方向を設定する。図７の場合、図の手前側から奥側に向かって回転ツールＦを移動させる（白抜き矢印で示している）。これにより、回転ツールＦの移動軌跡には線状の塑性化領域Ｗが形成される。 In the friction stir welding of the butt joint J1, the stirring pin F2 rotated right is inserted into the start position Sp set at a portion where the side surface 10a of the first metal member 10 and the end surface 30b of the auxiliary member 30 abut. The rotation tool F is relatively moved along J1. That is, with the base end side of the stirring pin F2 exposed, only the stirring pin F2 is brought into contact with the first metal member 10, the second metal member 20, and the auxiliary member 30 to perform friction stirring. Further, the traveling direction of the rotating tool F is set such that the auxiliary member 30 is positioned on the right side of the rotating tool F. In the case of FIG. 7, the rotary tool F is moved from the front side to the back side of the drawing (indicated by a white arrow). As a result, a linear plasticized region W is formed on the movement trajectory of the rotary tool F.

図８に示すように、摩擦攪拌工程では、連結部Ｆ１が第一金属部材１０の側面１０ａに干渉しないように、回転ツールＦを第二金属部材２０に対して傾斜させた状態で摩擦攪拌接合を行う。攪拌ピンＦ２の挿入角度や挿入深さは、第一金属部材１０と第二金属部材２０とを接合できるように適宜設定すればよい。なお、本実施形態では、鉛直面（側面１０ａ）に対して回転ツールＦの回転中心軸を４５°傾けている。 As shown in FIG. 8, in the friction stir process, the friction stir welding is performed in a state where the rotary tool F is inclined with respect to the second metal member 20 so that the coupling portion F1 does not interfere with the side surface 10 a of the first metal member 10. I do. The insertion angle and insertion depth of the stirring pin F2 may be appropriately set so that the first metal member 10 and the second metal member 20 can be joined. In the present embodiment, the central axis of rotation of the rotary tool F is inclined 45 ° with respect to the vertical surface (side surface 10a).

本接合工程では、補助部材３０にバリが発生するように接合条件を設定するのが望ましい。バリが発生する位置は、接合条件によって異なる。当該接合条件とは、回転ツールＦの回転速度、回転方向、移動速度（送り速度）、進行方向、攪拌ピンＦ２の傾斜角度（テーパー角度）、被接合金属部材（第一金属部材１０、第二金属部材２０および補助部材３０）の材質、被接合金属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。 In the main bonding step, it is desirable to set the bonding conditions so that burrs are generated in the auxiliary member 30. The position where burrs occur differs depending on the bonding conditions. The welding conditions include the rotational speed, rotational direction, moving speed (feed speed), advancing direction, inclination angle (taper angle) of the stirring pin F2, the joined metal member (first metal member 10, second) It is determined by the combination of the elements such as the material of the metal member 20 and the auxiliary member 30), the thickness of the joined metal member, and the like.

例えば、回転ツールＦの回転速度が遅い場合は、フロー側（retreating side：回転ツールの外周における接線速度から回転ツールの移動速度が減算される側）に比べてシアー側（advancing side：回転ツールの外周における接線速度に回転ツールの移動速度が加算される側）の方が、塑性流動材の温度が上昇し易くなるため、塑性化領域外のシアー側にバリが多く発生する傾向にある。一方、例えば、回転ツールＦの回転速度が速い場合、シアー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、塑性化領域外のフロー側にバリが多く発生する傾向がある。 For example, if the rotational speed of the rotary tool F is low, the side that is on the rotating side (adverting side: side on which the moving speed of the rotary tool is subtracted from the tangential speed on the outer periphery of the rotary tool) Since the temperature of the plastic fluid material is more likely to increase at the side where the moving speed of the rotary tool is added to the tangential speed at the outer periphery, more burrs tend to be generated on the shear side outside the plasticization region. On the other hand, for example, when the rotation speed of the rotary tool F is high, although the temperature of the plastic fluid material rises on the shear side, there is a tendency for more burrs to be generated on the flow side outside the plasticization region due to the higher rotation speed. is there.

本実施形態では、回転ツールＦの回転速度を速く設定しているため、突合せ部Ｊ１の摩擦攪拌接合では、塑性化領域Ｗ外のフロー側である補助部材３０にバリＶが多く発生する傾向にある（図８参照）。なお、回転ツールＦの接合条件および補助部材３０の配置位置は、ここで説明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。 In the present embodiment, since the rotational speed of the rotary tool F is set fast, in the friction stir welding of the abutting portion J1, a large amount of burrs V tends to be generated in the auxiliary member 30 on the flow side outside the plasticization region W. There is (see FIG. 8). The bonding conditions of the rotary tool F and the arrangement position of the auxiliary member 30 are not limited to those described here, and may be set as appropriate.

このようにして、バリＶが発生する側またはバリＶが多く発生する側が補助部材３０となるように接合条件を設定すれば、図７に示すように補助部材３０にバリＶを集約することができる。そのため、後記する除去工程を容易に行うことができるため好ましい。また、回転ツールＦの回転速度を速く設定することにより、回転ツールＦの移動速度（送り速度）を速めることができる。これにより接合サイクルを短くすることができる。 In this manner, if the joining condition is set such that the side on which the burr V is generated or the side on which the burr V is generated is the auxiliary member 30, the burr V may be concentrated on the auxiliary member 30 as shown in FIG. it can. Therefore, it is preferable because the removal step described later can be easily performed. In addition, by setting the rotational speed of the rotary tool F fast, it is possible to speed up the moving speed (feed speed) of the rotary tool F. This can shorten the bonding cycle.

本接合工程の後、除去工程を行う。本実施形態では、除去工程は、第二金属部材２０から補助部材３０を除去する工程である。図９に示すように、本実施形態の除去工程では、補助部材３０の端部を矢印方向にめくり上げて、塑性化領域Ｗを境に折り曲げるようにして切除する。除去工程は、切削工具等を用いてもよいが、本実施形態では手作業で除去している。補助部材３０にはバリＶが形成されているので、補助部材３０と共にバリＶも一緒に除去される。 After the main bonding step, a removal step is performed. In the present embodiment, the removing step is a step of removing the auxiliary member 30 from the second metal member 20. As shown in FIG. 9, in the removal step of the present embodiment, the end of the auxiliary member 30 is turned up in the direction of the arrow to cut it so as to be bent at the plasticization region W as a boundary. Although the removal process may use a cutting tool etc., in this embodiment, it removes manually. Since the burrs V are formed in the auxiliary member 30, the burrs V are removed together with the auxiliary member 30.

以上説明した本実施形態の接合方法によれば、第一金属部材１０と第二金属部材２０とが接合されるとともに、第一金属部材１０および第二金属部材２０に加えて、補助部材３０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、摩擦攪拌接合で発生するバリＶを補助部材３０ごと金属部材から除去することができるため、バリＶを除去する工程が容易となる。また、本接合工程では、攪拌ピンＦ２のみを被接合金属部材に接触させた状態で摩擦攪拌接合を行うため、接合装置に作用する負荷を軽減することができる。 According to the bonding method of the present embodiment described above, the first metal member 10 and the second metal member 20 are bonded, and the auxiliary member 30 is also added to the first metal member 10 and the second metal member 20. At the same time, friction shortage welding can prevent metal shortage of the joint.
Further, since the burrs V generated in the friction stir welding can be removed from the metal member together with the auxiliary member 30, the process of removing the burrs V becomes easy. Further, in the main bonding step, the friction stir welding is performed in a state where only the stirring pin F2 is in contact with the metal member to be bonded, so that the load acting on the bonding device can be reduced.

仮接合工程では、攪拌ピンＦ２のみを金属部材に接触させた状態で突合せ部Ｊ１，Ｊ２のスポット接合を行うことにより、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、従来のように突合せ部Ｊ１，Ｊ２の全長に対して仮接合を行う場合に比べて工程時間を短くすることができる。 In the temporary joining process, the load acting on the friction stir device can be reduced by spot joining the butting portions J1 and J2 in a state where only the stirring pin F2 is in contact with the metal member. In addition, the process time can be shortened as compared with the case where temporary bonding is performed on the entire length of the butting portions J1 and J2 as in the prior art.

さらに、仮接合用回転ツールおよび本接合用回転ツールは同一の回転ツールＦとすることにより、仮接合工程と本接合工程とで回転ツールＦの交換を行う必要がないため、作業効率を高めることができる Furthermore, since the rotary tool for temporary bonding and the rotary tool for main bonding are the same rotary tool F, it is not necessary to replace the rotary tool F in the temporary bonding step and the main bonding step, thus enhancing work efficiency. Can do

［第二実施形態］
第二実施形態も、突合せ工程と、仮接合工程と、補助部材配置工程と、本接合工程と、除去工程とを行う。しかし、補助部材配置工程、本接合工程および除去工程以外の工程は第一実施形態と同様であるため詳細な説明は省略する。また、第一実施形態と同様の部材等については第一実施形態と同一の符号を用い詳細な説明は省略する。 Second Embodiment
Also in the second embodiment, a butt step, a temporary joining step, an auxiliary member disposing step, a main joining step, and a removing step are performed. However, the steps other than the auxiliary member disposing step, the main joining step, and the removing step are the same as those in the first embodiment, and thus the detailed description is omitted. Moreover, about the member similar to 1st embodiment, detailed description is abbreviate | omitted using the code | symbol same as 1st embodiment.

まず、図１０、図１１に示すように、補助部材配置工程においては、第一金属部材１０の側面１０ａと第二金属部材２０の基端部２２とで構成される突合せ部Ｊ１を覆うように、第一金属部材１０の側面１０ａに補助部材３０の裏面３０ａを面接触させて第二金属部材２０の基端部２２に補助部材３０の端面３０ｂを突き合わせる。 First, as shown in FIGS. 10 and 11, in the auxiliary member disposing step, the butting portion J1 configured by the side surface 10a of the first metal member 10 and the base end portion 22 of the second metal member 20 is covered. The back surface 30a of the auxiliary member 30 is brought into surface contact with the side surface 10a of the first metal member 10, and the end face 30b of the auxiliary member 30 is brought into abutment with the proximal end 22 of the second metal member 20.

次に、本接合工程について説明する。突合せ部Ｊ１の摩擦攪拌接合では、第一金属部材１０の側面１０ａと補助部材３０の端面３０ｂとが当接する部分に設定した開始位置Ｓｐに、右回転させた攪拌ピンＦ２を挿入し、突合せ部Ｊ１に沿って回転ツール（本接合用回転ツール）Ｆを相対移動させる。つまり、攪拌ピンＦ２の基端側は露出させた状態で、攪拌ピンＦ２のみを第一金属部材１０、第二金属部材２０、補助部材３０に接触させて摩擦攪拌を行う。また、回転ツールＦの右側に補助部材３０が位置するように回転ツールＦの進行方向を設定する。図１２の場合、図の奥側から手前側に向かって回転ツールＦを移動させる（白抜き矢印で示している）。これにより、回転ツールＦの移動軌跡には線状の塑性化領域Ｗが形成される。また、バリＶも、主として補助部材３０に発生する。 Next, the main bonding step will be described. In the friction stir welding of the butt joint J1, the stirring pin F2 rotated right is inserted into the start position Sp set at a portion where the side surface 10a of the first metal member 10 and the end surface 30b of the auxiliary member 30 abut. The rotary tool (main welding rotary tool) F is relatively moved along J1. That is, with the base end side of the stirring pin F2 exposed, only the stirring pin F2 is brought into contact with the first metal member 10, the second metal member 20, and the auxiliary member 30 to perform friction stirring. Further, the traveling direction of the rotating tool F is set such that the auxiliary member 30 is positioned on the right side of the rotating tool F. In the case of FIG. 12, the rotary tool F is moved from the back side to the front side of the drawing (indicated by the white arrow). As a result, a linear plasticized region W is formed on the movement trajectory of the rotary tool F. Further, the burrs V are also generated mainly in the auxiliary member 30.

除去工程は、第一金属部材１０から補助部材３０を除去する工程である。図示はしないが、本実施形態でも第一実施形態と同様に補助部材３０の端部をめくって、塑性化領域Ｗを境に折り曲げるようにして切除する。補助部材３０にはバリＶが形成されているので、補助部材３０と共にバリＶも一緒に除去される。 The removing step is a step of removing the auxiliary member 30 from the first metal member 10. Although not shown, in the present embodiment as well as the first embodiment, the end portion of the auxiliary member 30 is turned up and cut out so as to be bent at the plasticization region W as a boundary. Since the burrs V are formed in the auxiliary member 30, the burrs V are removed together with the auxiliary member 30.

以上説明した本実施形態の接合方法によれば、第一金属部材１０と第二金属部材２０とが接合されるとともに、第一金属部材１０および第二金属部材２０に加えて、補助部材３０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、本実施形態の除去工程でも、摩擦攪拌接合で発生するバリＶを補助部材３０ごと第一金属部材１０から除去することができるため、バリを除去する工程が容易となる。
その他、第二実施形態によれば第一実施形態と同様の効果を奏することができる According to the bonding method of the present embodiment described above, the first metal member 10 and the second metal member 20 are bonded, and the auxiliary member 30 is also added to the first metal member 10 and the second metal member 20. At the same time, friction shortage welding can prevent metal shortage of the joint.
Further, also in the removal step of the present embodiment, since the burr V generated in the friction stir welding can be removed from the first metal member 10 together with the auxiliary member 30, the step of removing the burr is facilitated.
Besides, according to the second embodiment, the same effect as the first embodiment can be exhibited.

［第三実施形態］
第三実施形態も、突合せ工程と、仮接合工程と、補助部材配置工程と、本接合工程と、除去工程とを行う。第三実施形態では、仮接合工程以外の工程は第一実施形態または第二実施形態と同様であるため詳細な説明は省略する。また、第一実施形態と同様の部材等については第一実施形態と同一の符号を用い詳細な説明は省略する。 Third Embodiment
Also in the third embodiment, a butt step, a temporary joining step, an auxiliary member disposing step, a main joining step, and a removal step are performed. In the third embodiment, steps other than the temporary bonding step are the same as in the first embodiment or the second embodiment, and therefore detailed description will be omitted. Moreover, about the member similar to 1st embodiment, detailed description is abbreviate | omitted using the code | symbol same as 1st embodiment.

本実施形態の仮接合工程は、図１３、図１４に示すように、溶接により突合せ部Ｊ１，Ｊ２に対して仮接合を行う工程である。このとき、溶接の種類は特に制限されないが、例えば、ＭＩＧ溶接（Metal Inert Gas welding）、ＴＩＧ溶接（Tungsten Inert Gas welding）等のアーク溶接やレーザ溶接で行うことができる。 The temporary joining process of this embodiment is a process which performs temporary joining with respect to abutment part J1, J2 by welding, as shown to FIG. 13, FIG. At this time, the type of welding is not particularly limited, and can be performed by arc welding such as MIG (Metal Inert Gas welding) or TIG welding (Tungsten Inert Gas welding) or laser welding.

符号Ｙ１は、溶接機のノズルである。また、ノズルＹ１と突合せ部Ｊ１，Ｊ２との間に位置する符号Ｙ２は溶接がＭＩＧ溶接、ＴＩＧ溶接の場合であれば、ノズルＹ１と突合せ部Ｊ１，Ｊ２との間に発生するアークであり、レーザ溶接の場合は、ノズルＹ１から照射されるレーザ光である。 The code | symbol Y1 is a nozzle of a welding machine. Further, a symbol Y2 located between the nozzle Y1 and the butt joint J1, J2 is an arc generated between the nozzle Y1 and the butt joint J1, J2 if the welding is MIG welding or TIG welding, In the case of laser welding, it is a laser beam irradiated from the nozzle Y1.

このような溶接を用いて仮接合を行う場合、図１３および図１４に示すように、ノズルＹ１を突合せ部Ｊ１，Ｊ２に沿って移動して所定間隔で浅く溶接し（浅い溶融池を形成し）、スポット接合を実施する。これにより突合せ部Ｊ１，Ｊ２に所定間隔で点状の溶接領域であるスポット接合領域Ｗ０１が形成される。また、ＭＩＧ溶接、ＴＩＧ溶接では、溶加材を供給しつつ溶接を行い、突合せ部Ｊ１，Ｊ２に溶接金属を形成することができる。 When temporary joining is performed using such welding, as shown in FIGS. 13 and 14, the nozzle Y1 is moved along the butting portions J1 and J2 and is shallowly welded at a predetermined interval (a shallow molten pool is formed ), Perform spot bonding. As a result, spot junction areas W01, which are point-like welding areas, are formed at the predetermined intervals on the butt portions J1 and J2. In MIG welding and TIG welding, welding can be performed while supplying a filler metal to form welding metal at the butt portions J1 and J2.

かかる溶接を用いた仮接合工程によれば、従来のように突合せ部Ｊ１，Ｊ２の全長に対して仮接合を行う場合に比べて工程時間を短くすることができる。
その他、第三実施形態によれば第一実施形態または第二実施形態と同様の効果を奏することができる。 According to the temporary joining process using such welding, the process time can be shortened as compared with the case where temporary joining is performed with respect to the full length of the abutting portions J1 and J2 as in the prior art.
In addition, according to the third embodiment, the same effects as the first embodiment or the second embodiment can be obtained.

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において適宜設計変更が可能である。例えば、仮接合工程と、本接合工程とで異なる回転ツールを用いてもよい。また、仮接合工程は、省略してもよいし、突合せ部Ｊ１，Ｊ２の少なくとも一方に行うだけでもよい。 Although the embodiments of the present invention have been described above, design changes can be made as appropriate without departing from the spirit of the present invention. For example, different rotary tools may be used in the temporary bonding step and the main bonding step. In addition, the temporary bonding step may be omitted, or may be performed only on at least one of the butting portions J1 and J2.

１０第一金属部材
１０ａ側面
２０第二金属部材
２１縦板
２１ａ側面
２１ｂ側面
２２基端部
２３横板
３０補助部材
３０ａ裏面
３０ｂ端面
Ｆ回転ツール、本接合用回転ツール、仮接合用回転ツール
Ｆ１攪拌ピン
Ｊ１突合せ部
Ｊ２突合せ部 DESCRIPTION OF SYMBOLS 10 1st metal member 10a side 20 2nd metal member 21 vertical plate 21a side 21b side 22 base end 23 side plate 30 auxiliary member 30a back 30b end face F rotation tool, rotation tool for main bonding, rotation tool for temporary bonding F1 stirring Pin J1 butt joint J2 butt joint

Claims

攪拌ピンを備えた本接合用回転ツールを用いて第一金属部材と第二金属部材とを摩擦攪拌接合で接合する接合方法であって、
前記第一金属部材は、板状を呈し、
前記第二金属部材は、縦板の一方の側面側の基端部から横板が突出した断面Ｌ字形状に形成されており、
前記第一金属部材の側面と前記第二金属部材の前記縦板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、
前記突合せ工程後、前記第一金属部材の側面と前記第二金属部材の前記基端部とで構成される前記突合せ部を覆うように、前記第二金属部材の横板に補助部材の裏面を面接触させる補助部材配置工程と、
前記補助部材配置工程後、前記攪拌ピンを前記補助部材の表面側から挿入し、前記攪拌ピンのみを前記補助部材、前記第一金属部材およ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本接合用回転ツールを相対移動させて、前記補助部材、前記第一金属部材および前記第二金属部材の摩擦攪拌接合を行う本接合工程と、
前記本接合工程後、バリが形成された前記補助部材を前記第二金属部材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。 It is a joining method of joining a first metal member and a second metal member by friction stir welding using a rotary tool for main welding provided with a stirring pin,
The first metal member has a plate shape,
The second metal member is formed in an L-shaped cross section in which a horizontal plate protrudes from a base end on one side of the vertical plate,
Butting step of butting the side surface of the first metal member and the other side surface of the vertical plate of the second metal member to form a butt portion;
After the butting step, the back surface of the auxiliary member is attached to the side plate of the second metal member so as to cover the butting portion constituted by the side surface of the first metal member and the base end portion of the second metal member. An auxiliary member disposing step for surface contact;
After the step of arranging the auxiliary member, the stirring pin is inserted from the surface side of the auxiliary member, and only the stirring pin is brought into contact with the auxiliary member, the first metal member and the second metal member. Main welding step of performing relative friction stir welding of the auxiliary member, the first metal member, and the second metal member by relatively moving the main welding rotary tool along the portion;
And removing the auxiliary member on which the burr is formed from the second metal member after the main bonding step.

攪拌ピンを備えた本接合用回転ツールを用いて第一金属部材と第二金属部材とを摩擦攪拌接合で接合する接合方法であって、
前記第一金属部材は、板状を呈し、
前記第二金属部材は、縦板の一方の側面側の基端部から横板が突出した断面Ｌ字形状に形成されており、
前記第一金属部材の側面と前記第二金属部材の前記縦板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、
前記突合せ工程後、前記第一金属部材の側面と前記第二金属部材の前記基端部とで構成される前記突合せ部を覆うように、前記第一金属部材の前記側面に補助部材の裏面を面接触させる補助部材配置工程と、
前記補助部材配置工程後、前記攪拌ピンを前記補助部材の表面側から挿入し、前記攪拌ピンのみを前記補助部材、前記第一金属部材およ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本接合用回転ツールを相対移動させて、前記補助部材、前記第一金属部材および前記第二金属部材の摩擦攪拌接合を行う本接合工程と、
前記本接合工程後、バリが形成された前記補助部材を前記第一金属部材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。 It is a joining method of joining a first metal member and a second metal member by friction stir welding using a rotary tool for main welding provided with a stirring pin,
The first metal member has a plate shape,
The second metal member is formed in an L-shaped cross section in which a horizontal plate protrudes from a base end on one side of the vertical plate,
Butting step of butting the side surface of the first metal member and the other side surface of the vertical plate of the second metal member to form a butt portion;
After the butting step, the back surface of the auxiliary member is attached to the side surface of the first metal member so as to cover the butting portion including the side surface of the first metal member and the base end portion of the second metal member. An auxiliary member disposing step for surface contact;
After the step of arranging the auxiliary member, the stirring pin is inserted from the surface side of the auxiliary member, and only the stirring pin is brought into contact with the auxiliary member, the first metal member and the second metal member. Main welding step of performing relative friction stir welding of the auxiliary member, the first metal member, and the second metal member by relatively moving the main welding rotary tool along the portion;
And a removing step of removing the auxiliary member on which the burr is formed from the first metal member after the main bonding step.

前記補助部材配置工程の前に、前記第一金属部材の側面と前記第二金属部材の基端部とで構成される前記突合せ部に仮接合用回転ツールの攪拌ピンのみを挿入して摩擦攪拌接合によるスポット接合を行う仮接合工程を含むことを特徴とする請求項１または請求項２に記載の接合方法。 Prior to the auxiliary member disposing step, only the stirring pin of the rotating tool for temporary bonding is inserted into the abutment portion constituted by the side surface of the first metal member and the base end portion of the second metal member to perform friction stirring The bonding method according to claim 1 or 2, further comprising a temporary bonding step of performing spot bonding by bonding.

前記仮接合用回転ツールおよび前記本接合用回転ツールは同一の回転ツールであることを特徴とする請求項３に記載の接合方法。 The joining method according to claim 3, wherein the temporary joining rotary tool and the main joining rotary tool are the same rotary tool.

前記補助部材配置工程の前に、前記第一金属部材の側面と前記第二金属部材の基端部とで構成される前記突合せ部に溶接によるスポット接合をする仮接合工程を含むことを特徴とする請求項１または請求項２に記載の接合方法。 Before the auxiliary member disposing step, the method further includes a temporary joining step of spot joining by welding to the butt portion including the side surface of the first metal member and the base end portion of the second metal member. The joining method according to claim 1 or claim 2.

前記溶接は、ＭＩＧ溶接、ＴＩＧ溶接またはレーザ溶接であることを特徴とする請求項５に記載の接合方法。 The welding method according to claim 5, wherein the welding is MIG welding, TIG welding or laser welding.

前記補助部材配置工程の前に、前記第一金属部材の先端と前記第二金属部材の縦板の先端とで構成される前記突合せ部に仮接合用回転ツールの攪拌ピンのみを挿入して摩擦攪拌接合によるスポット接合を行う仮接合工程を含むことを特徴とする請求項１または請求項２に記載の接合方法。 Prior to the auxiliary member disposing step, only the stirring pin of the rotating tool for temporary bonding is inserted into the abutment portion constituted by the tip of the first metal member and the tip of the vertical plate of the second metal member to perform friction The bonding method according to claim 1 or 2, further comprising a temporary bonding step of performing spot bonding by stirring bonding.

前記仮接合用回転ツールおよび前記本接合用回転ツールは同一の回転ツールであることを特徴とする請求項７に記載の接合方法。 The joint method according to claim 7, wherein the temporary joint rotary tool and the main joint rotary tool are the same rotary tool.

前記補助部材配置工程の前に、前記第一金属部材の先端と前記第二金属部材の縦板の先端とで構成される前記突合せ部に溶接によるスポット接合をする仮接合工程を含むことを特徴とする請求項１または請求項２に記載の接合方法。 It is characterized by including a temporary joining step of performing spot bonding by welding on the butt portion constituted by the tip of the first metal member and the tip of the vertical plate of the second metal member before the auxiliary member disposing step. The bonding method according to claim 1 or claim 2.

前記溶接は、ＭＩＧ溶接、ＴＩＧ溶接またはレーザ溶接であることを特徴とする請求項９に記載の接合方法。 The joining method according to claim 9, wherein the welding is MIG welding, TIG welding or laser welding.