JP2018069325A

JP2018069325A - Joining method

Info

Publication number: JP2018069325A
Application number: JP2016215896A
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: 2016-11-04
Filing date: 2016-11-04
Publication date: 2018-05-10
Anticipated expiration: 2036-11-04
Also published as: JP6769244B2

Abstract

PROBLEM TO BE SOLVED: To provide a joining method by which metal shortage of a junction can be prevented.SOLUTION: A joining method for joining metallic components 10, 20 to one another, in which a first metallic component 10 and a second metallic component 20 have an L-shaped cross section, includes: a process in which the other side face 11b of a vertical plate 11 of the first metallic component 10 and the other side face 21b of a vertical plate 21 of the second metallic component 20 are abutted to each other, thereby forming an abutting part J1 on a base end side; a process in which an auxiliary component 30 is located on both metallic components 10, 20 so as to cover the abutting part J1 on the base end side; a process in which a rotary tool F is moved in the state that only a stirring pin F2 is brought into contact with the auxiliary component 30 and both metallic components 10, 20, and friction stir joining of the auxiliary component 30 and both metallic components 10, 20 is performed; and a process in which the auxiliary component 30, on which a burr is formed, is removed from both metallic components 10, 20.SELECTED DRAWING: Figure 7

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、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 joining method in which a first metal member and a second metal member are joined by friction stirring. In the joining method, after the first metal member and the second metal member are butted together to form a butted portion, only the stirring pin of the rotary tool is brought into contact with the first metal member and the second metal member. On the other hand, friction stirring is performed.

特開２０１３−０３９６１３号公報JP 2013-039613 A

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。 In the conventional joining method described above, since the plastic fluidized metal is not pressed by the shoulder portion of the rotary tool, there is a problem that the plastic fluidized metal leaks to the outside and the joint becomes insufficient.

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 the metal shortage of a junction part.

前記課題を解決するための第一の発明は、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で接合する接合方法であって、前記第一金属部材および前記第二金属部材は、縦板の一方の側面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前記縦板の他方の側面と、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、基端側の前記突合せ部を覆うように、前記第一金属部材および前記第二金属部材に補助部材を配置する補助部材配置工程と、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、基端側の前記突合せ部に沿って前記本接合用回転ツールを移動させて、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、バリが形成された前記補助部材を前記第一金属部材および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。 A first invention for solving the above-described problem is a joining method in which a first metal member and a second metal member are joined by friction stirring using a main welding rotary tool provided with a stirring pin. The one metal member and the second metal member are formed in an L-shaped cross section in which a horizontal plate protrudes from a base end portion of one side surface of the vertical plate, and the other side surface of the vertical plate of the first metal member And the other side surface of the vertical plate of the second metal member abutting step to form a butting portion, and the first metal member and the second metal so as to cover the butting portion on the base end side An auxiliary member arranging step of arranging an auxiliary member on the member; and 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. In front of the butt section on the base end side. A main joining step in which a friction stir welding of the auxiliary member, the first metal member, and the second metal member is performed by moving the rotary tool for main joining, and the auxiliary member on which the burr is formed is used as the first metal member. And a removing step of removing from the second metal member.

前記課題を解決するための第二の発明は、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で接合する接合方法であって、前記第一金属部材および前記第二金属部材は、縦板の一方の側面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前記縦板の他方の側面と、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、基端側の前記突合せ部に沿って、前記第一金属部材または前記第二金属部材に補助部材を配置する補助部材配置工程と、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、基端側の前記突合せ部に沿って前記本接合用回転ツールを移動させて、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、バリが形成された前記補助部材を前記第一金属部材または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。 A second invention for solving the above-described problem is a joining method in which the first metal member and the second metal member are joined by friction stirring using the main rotating tool having a stirring pin. The one metal member and the second metal member are formed in an L-shaped cross section in which a horizontal plate protrudes from a base end portion of one side surface of the vertical plate, and the other side surface of the vertical plate of the first metal member A butting step of butting the other side surface of the vertical plate of the second metal member to form a butting portion, and the first metal member or the second metal member along the butting portion on the base end side The auxiliary member arranging step of arranging the auxiliary member on the surface, 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 In the state, the book along the butt portion on the base end side A main joining step of moving the combined rotating tool to perform friction stir welding of the auxiliary member, the first metal member and the second metal member; and the auxiliary member on which the burr is formed, the first metal member or the And a removing step of removing from the second metal member.

第一の発明および第二の発明における接合方法によれば、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。
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。 According to the joining method in the first invention and the second invention, 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 also frictions simultaneously. By stirring and joining, metal shortage at the joint can be prevented.
Moreover, since the burr | flash generate | occur | produced by friction stir welding can be removed from a metal member with an auxiliary member, the process of removing a burr | flash becomes easy.

前記補助部材配置工程の前に、基端側の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スポットで摩擦攪拌接合を行う仮接合工程を含むことが好ましい。
前記補助部材配置工程の前に、先端側の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スポットで摩擦攪拌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 arranging step, it is preferable to include a temporary joining step in which only the stirring pin of the rotary tool for temporary joining is inserted into the abutting portion on the base end side and the friction stir welding is performed with a spot.
Prior to the auxiliary member arranging step, it is preferable to include a temporary joining step in which only the stirring pin of the rotary tool for temporary joining is inserted into the abutting portion on the distal end side and the friction stir welding is performed with a spot.

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, it is possible to reduce the load acting on the friction stirrer by performing spot spotting of the butt portion in a state where only the stirring pin is in contact with the metal member. Moreover, the process time can be shortened compared with the case where temporary joining is performed on the entire length of the butt portion as in the prior art.

また、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。かかる接合方法によれば、回転ツールの交換を行う必要が無いため、作業効率を高めることができる。 Moreover, it is preferable that the said temporary rotating tool for temporary joining and the said rotational tool for main joining are the same rotating tools. According to such a joining method, since it is not necessary to replace the rotating tool, the working efficiency can be improved.

前記補助部材配置工程の前に、基端側の前記突合せ部を溶接によるスポットで接合する仮接合工程を含むことが好ましい。また、前記溶接は、ＭＩＧ溶接、ＴＩＧ溶接またはレーザー溶接を用いることができる。
前記補助部材配置工程の前に、先端側の前記突合せ部を溶接によるスポットで接合する仮接合工程を含むことが好ましい。また、前記溶接は、ＭＩＧ溶接、ＴＩＧ溶接またはレーザー溶接を用いることができる。 It is preferable to include the temporary joining process of joining the said butt | matching part of a base end side with the spot by welding before the said auxiliary member arrangement | positioning process. Moreover, MIG welding, TIG welding, or laser welding can be used for the said welding.
Before the auxiliary member arranging step, it is preferable to include a temporary joining step of joining the butt portion on the tip side with a spot by welding. Moreover, MIG welding, TIG welding, or laser welding can be used for the said welding.

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。 According to this joining method, process time can be shortened compared with the case where temporary joining is performed with respect to the full length of the butt | matching part conventionally.

本発明に係る接合方法によれば、接合部の金属不足を防ぐことができる。 According to the joining method according to the present invention, metal shortage at the joint can be prevented.

第一実施形態に係る接合方法の突合せ工程前を示す斜視図である。It is a perspective view which shows before the butt | matching process of the joining method which concerns on 1st embodiment. 第一実施形態に係る接合方法の突合せ工程後を示す断面図である。It is sectional drawing which shows the after-butting process of the joining method which concerns on 1st embodiment. 第一実施形態に係る接合方法の仮接合工程において先端側の突合せ部の仮接合を示す斜視図である。It is a perspective view which shows temporary joining of the butt | matching part of the front end side in the temporary joining process of the joining method which concerns on 1st embodiment. 第一実施形態に係る接合方法の仮接合工程において基端側の突合せ部の仮接合を示す斜視図である。It is a perspective view which shows temporary joining of the butt | matching part of a base end side in the temporary joining process of the joining method which concerns on 1st embodiment. 第一実施形態に係る接合方法の補助部材配置工程を示す斜視図である。It is a perspective view which shows the auxiliary member 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補助部材配置工程を示す斜視図である。It is a perspective view which shows the auxiliary member 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本接合工程を示す斜視図である。It is a perspective view which shows the main joining process of the joining method which concerns on 1st embodiment. 第一実施形態に係る接合方法の本接合工程を示す断面図である。It is sectional drawing which shows the main joining 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前を示す断面図である。It is sectional drawing which shows before 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. 第一実施形態に係る接合方法の仮接合工程において先端側の突合せ部の仮接合の変形例を示す斜視図である。It is a perspective view which shows the modification of the temporary joining of the butt | matching part of the front end side in the temporary joining process of the joining method which concerns on 1st embodiment. 第一本実施形態に係る接合方法の仮接合工程において基端側の突合せ部の仮接合の変形例を示す斜視図である。It is a perspective view which shows the modification of the temporary joining of the butt | matching part of a base end side in the temporary joining process of the joining method which concerns on 1st this embodiment. 第二実施形態に係る接合方法の補助部材配置工程を示す断面図である。It is sectional drawing which shows the auxiliary member 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本接合工程を示す断面図である。It is sectional drawing which shows the main joining 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補助部材配置工程を示す断面図である。It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 3rd embodiment. 第三実施形態に係る接合方法の本接合工程を示す断面図である。It is sectional drawing which shows the main joining process of the joining method which concerns on 3rd embodiment. 第三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 3rd 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１〜図１０を参照して詳細に説明する。第一実施形態では、断面Ｌ字形状の二つの金属板（第一金属部材と第二金属部材）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、第一仮接合工程と、第二仮接合工程と、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 joining method according to the first embodiment of the present invention will be described in detail with reference to FIGS. In the first embodiment, two metal plates (a first metal member and a second metal member) having an L-shaped cross section are joined. In the joining method according to the first embodiment, a butt process, a first provisional joining process, a second provisional joining process, an auxiliary member arranging process, a main joining process, and a removing process are performed. In the following description, “front surface” means a surface opposite to the “back surface”.

突合せ工程は、図１に示すように、断面Ｌ字形状の第一金属部材１０と第二金属部材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は、アルミニウム合金製の板状部材からなる。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。第一実施形態の第一金属部材１０と第二金属部材２０とは、同一の断面Ｌ字形状の型材を逆向きに配置したものである。 As shown in FIG. 1, the butting process is a process in which the first metal member 10 and the second metal member 20 having an L-shaped cross section are butted.
The 1st metal member 10 and the 2nd metal member 20 consist of a plate-shaped member made from an aluminum alloy. The material of the first metal member 10 and the second metal member 20 is appropriately selected from metals capable of friction stirring such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy. The first metal member 10 and the second metal member 20 according to the first embodiment are formed by arranging the same L-shaped mold members in opposite directions.

第一金属部材１０は、軸断面がＬ字形状に形成された型材である。第一金属部材１０は、縦板１１と、縦板１１の一方の側面１１ａの基端部から一方に向けて突出した横板１２とによって構成されている。すなわち、縦板１１の基端部（図１における縦板１１の下端部）から一方に向けて横板１２が直角に屈曲している。このように、第一金属部材１０では、横板１２の他方側の側縁部に縦板１１が直角に立ち上げられている。
縦板１１と横板１２との接続部には、図２に示すように、直角に屈曲した角部１３が形成されている。角部１３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、第一実施形態の第一金属部材１０では、縦板１１の高さと、横板１２の横幅と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。 The first metal member 10 is a mold having an L-shaped axial cross section. The first metal member 10 includes a vertical plate 11 and a horizontal plate 12 that protrudes toward one side from a base end portion of one side surface 11a of the vertical plate 11. That is, the horizontal plate 12 is bent at a right angle from the base end portion of the vertical plate 11 (the lower end portion of the vertical plate 11 in FIG. 1) to one side. Thus, in the first metal member 10, the vertical plate 11 is raised at a right angle on the other side edge portion of the horizontal plate 12.
As shown in FIG. 2, a corner portion 13 bent at a right angle is formed at a connection portion between the vertical plate 11 and the horizontal plate 12. A curved surface curved in an arc shape is formed on the top of the outer side of the corner portion 13.
In addition, in the 1st metal member 10 of 1st embodiment, although formed in the length same as the height of the vertical board 11, and the horizontal width of the horizontal board 12, you may form in different length.

第二金属部材２０は、図１に示すように、軸断面がＬ字形状に形成された型材であり、第一金属部材１０と同じ形状の部材である。第二金属部材２０は、縦板２１と、縦板２１の一方の側面２１ａの基端部から他方に向けて突出した横板２２とで構成されている。
なお、第二金属部材２０は、第一金属部材１０と同様に、縦板１１の高さと、横板１２の横幅とを異なる長さに形成してもよい。 As shown in FIG. 1, the second metal member 20 is a mold member having an L-shaped axial cross section, and is a member having the same shape as the first metal member 10. The second metal member 20 includes a vertical plate 21 and a horizontal plate 22 protruding from the base end portion of one side surface 21a of the vertical plate 21 toward the other side.
Note that the second metal member 20 may be formed such that the height of the vertical plate 11 and the horizontal width of the horizontal plate 12 are different from each other in the same manner as the first metal member 10.

突合せ工程では、第一金属部材１０と第二金属部材２０とを逆向きに配置し、図２に示すように、第一金属部材１０の縦板１１の他方の側面１１ｂと、第二金属部材２０の縦板２１の他方の側面２１ｂとを面接触させて突き合わせる。
このとき、第一金属部材１０の横板１２の裏面１２ａ（図２における横板１２の下面）と、第二金属部材２０の横板２２の裏面２２ａ（図２における横板２２の下面）とを面一とする。
また、第一金属部材１０の縦板１１の先端面１１ｃ（図２における縦板１１の上端面）と、第二金属部材２０の縦板２１の先端面２１ｃ（図２における縦板２１の上端面）とを面一とする。 In the butting step, the first metal member 10 and the second metal member 20 are disposed in opposite directions, and as shown in FIG. 2, the other side surface 11b of the vertical plate 11 of the first metal member 10 and the second metal member The other side surface 21b of the 20 vertical plates 21 is brought into surface contact with each other.
At this time, the back surface 12a of the horizontal plate 12 of the first metal member 10 (the lower surface of the horizontal plate 12 in FIG. 2) and the back surface 22a of the horizontal plate 22 of the second metal member 20 (the lower surface of the horizontal plate 22 in FIG. 2) Is the same.
Further, the front end surface 11c of the vertical plate 11 of the first metal member 10 (the upper end surface of the vertical plate 11 in FIG. 2) and the front end surface 21c of the vertical plate 21 of the second metal member 20 (on the vertical plate 21 in FIG. 2). And the end face) are flush with each other.

突合せ工程によって、第一金属部材１０の他方の側面１１ｂと、第二金属部材２０の他方の側面２１ｂとが突き合わされると、第一金属部材１０の角部１３と第二金属部材２０の角部２３とによって、基端側の突合せ部Ｊ１が形成される。
第一金属部材１０の角部１３と第二金属部材２０の角部２３とは、逆向きに湾曲しているため、第一金属部材１０の角部１３と第二金属部材２０の角部２３との間には、略Ｖ字形状の隙間Ｓが形成される。 When the other side surface 11b of the first metal member 10 and the other side surface 21b of the second metal member 20 are abutted by the butting step, the corner portion 13 of the first metal member 10 and the corner of the second metal member 20 are aligned. A base end-side butting portion J1 is formed by the portion 23.
Since the corner 13 of the first metal member 10 and the corner 23 of the second metal member 20 are curved in opposite directions, the corner 13 of the first metal member 10 and the corner 23 of the second metal member 20 are curved. Between the two, a substantially V-shaped gap S is formed.

また、突合せ工程によって、第一金属部材１０と第二金属部材２０とが突き合わされると、第一金属部材１０の縦板１１の先端面１１ｃと第二金属部材２０の縦板２１の先端面２１ｃとによって、先端側の突合せ部Ｊ２が形成される。 Moreover, when the 1st metal member 10 and the 2nd metal member 20 are faced | matched by the butt | matching process, the front end surface 11c of the vertical plate 11 of the 1st metal member 10 and the front end surface of the vertical plate 21 of the 2nd metal member 20 21c forms a butt portion J2 on the distal end side.

第一仮接合工程は、図３に示すように、回転ツールＦ（仮接合用回転ツール）を用いて先端側の突合せ部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。 As shown in FIG. 3, the first temporary joining step is a step of performing temporary joining to the abutting portion J <b> 2 on the distal end side using the rotary tool F (temporary joining rotary tool).
The rotary tool F is made of, for example, tool steel. The rotary tool F includes a connecting portion F1 and a stirring pin F2. The connecting part F1 is a part connected to the rotating shaft of the friction stirrer. The connecting part 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。
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。 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 is separated from the connecting portion F1. A spiral groove is formed on the outer peripheral surface of the stirring pin F2. In the first embodiment, in order to rotate the rotary tool F to the right, the spiral groove is formed counterclockwise as it goes from the proximal end to the distal end.
In addition, when rotating the rotation tool F counterclockwise, it is preferable to form the spiral groove clockwise as it goes from the proximal end to the distal end.

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。なお、螺旋溝は省略してもよい。 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 10, the 2nd metal member 20, and the auxiliary member 30) can be decreased. The spiral groove may be omitted.

第一仮接合工程では、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仮付けを行う。第一仮接合工程では、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。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。
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、容易にスポット仮付けを行うことができる。 In the first temporary joining step, spot tacking is performed by bringing only the stirring pin F2 of the rotated rotary tool F into contact with the abutting portion J2 on the distal end side. In the first temporary joining step, only the stirring pin F2 is shallowly pushed into the abutting portion J2 on the tip side with a predetermined interval. A plasticized region W0 is formed in the trace of pushing of the stirring pin F2.
The rotary tool F is preferably attached to an arm robot (not shown) provided with a rotation drive means such as a spindle unit at the tip. Thereby, spot tacking can be performed easily.

第二仮接合工程は、図４に示すように、回転ツールＦ（仮接合用回転ツール）を用いて基端側の突合せ部Ｊ１に対して仮接合を行う工程である。
第二仮接合工程では、第一金属部材１０および第二金属部材２０を上下反転させ回転させ、回転ツールＦによって基端側の突合せ部Ｊ１にスポット仮付けを行う。第二仮接合工程では、第一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。 As shown in FIG. 4, the second temporary joining step is a step of temporarily joining the base end side butt portion J <b> 1 using the rotating tool F (temporary joining rotating tool).
In the second temporary joining step, the first metal member 10 and the second metal member 20 are turned upside down and rotated, and spot rotation is performed on the abutting portion J1 on the base end side by the rotating tool F. In the second temporary joining step, as in the first temporary joining step, the plasticized region W0 is formed by pressing only the stirring pin F2 shallowly into the abutting portion J1 on the base end side with a predetermined interval. .

補助部材配置工程は、図５に示すように、基端側の突合せ部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。
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。 As shown in FIG. 5, 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 base end-side butting portion J1.
The auxiliary member 30 is a metal plate member. The auxiliary member 30 is not particularly limited as long as it is a metal capable of friction stirring, 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.
The plate thickness of the auxiliary member 30 is appropriately set so that the plasticized region W does not run out of metal and the gap S of the butt end portion J1 on the base end side is filled with metal after the main joining step described later. In the first embodiment, the plate thickness of the auxiliary member 30 is set to be thinner than the plate thicknesses of the first metal member 10 and the second metal member 20.

補助部材配置工程では、図６に示すように、補助部材３０の裏面３０ｂと、第一金属部材１０の横板１２の裏面１２ａおよび第二金属部材２０の横板２２の裏面２２ａとを面接触させる。これにより、補助部材３０によって基端側の突合せ部Ｊ１が覆われる。
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）によって架台（図示せず）に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。 In the auxiliary member arranging step, as shown in FIG. 6, the back surface 30 b of the auxiliary member 30 and the back surface 12 a of the horizontal plate 12 of the first metal member 10 and the back surface 22 a of the horizontal plate 22 of the second metal member 20 are in surface contact. Let Thereby, the butt portion J1 on the proximal end side is covered by the auxiliary member 30.
Moreover, the 1st metal member 10, the 2nd metal member 20, and the auxiliary member 30 are restrained to a mount (not shown) so that a movement is impossible with a jig | tool (not shown). In addition, in 1st embodiment, although the auxiliary member 30 is made into plate shape, another shape may be sufficient.

本接合工程は、図７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。本接合工程では、図８に示すように、右回転させた回転ツールＦを補助部材３０の表面３０ａから挿入し、基端側の突合せ部Ｊ１に達するように、攪拌ピンＦ２の挿入深さを設定する。
本接合工程では、攪拌ピンＦ２のみを補助部材３０、第一金属部材１０および第二金属部材２０に接触させ、攪拌ピンＦ２の基端側は露出させた状態で摩擦攪拌接合を行う。
そして、図７に示すように、基端側の突合せ部Ｊ１に沿って回転ツールＦを移動させる。これにより、基端側の突合せ部Ｊ１において、補助部材３０、第一金属部材１０および第二金属部材２０が摩擦攪拌接合される。回転ツールＦの移動軌跡には、塑性化領域Ｗが形成される。
本接合工程後には、図９に示すように、補助部材３０は、塑性化領域Ｗによって第一金属部材１０側と第二金属部材２０側とに分断される。また、分断された補助部材３０，３０の端部にはバリＶ，Ｖが形成されている。 As shown in FIG. 7, the main joining step is a step of performing friction stir welding with respect to the butt end portion J <b> 1 on the base end side using the rotary tool F (main welding rotary tool). In the main joining step, as shown in FIG. 8, the rotating tool F rotated to the right is inserted from the surface 30a of the auxiliary member 30, and the insertion depth of the stirring pin F2 is set so as to reach the abutting portion J1 on the base end side. Set.
In the main joining step, friction stir welding is performed with only the stirring pin F2 in contact with the auxiliary member 30, the first metal member 10, and the second metal member 20, and the proximal end side of the stirring pin F2 is exposed.
Then, as shown in FIG. 7, the rotary tool F is moved along the base end-side butting portion J1. As a result, the auxiliary member 30, the first metal member 10, and the second metal member 20 are friction stir welded at the abutting portion J1 on the proximal end side. A plasticized region W is formed on the movement locus of the rotary tool F.
After the main joining step, as shown in FIG. 9, the auxiliary member 30 is divided into the first metal member 10 side and the second metal member 20 side by the plasticized region W. Further, burrs V and V are formed at the ends of the divided auxiliary members 30 and 30.

除去工程は、図１０に示すように、補助部材３０を第一金属部材１０および第二金属部材２０から除去する工程である。除去工程では、例えば手作業により、補助部材３０を第一金属部材１０および第二金属部材２０から離間する方向に折り曲げて、補助部材３０を第一金属部材１０および第二金属部材２０から除去する。これにより、第一金属部材１０の横板１２と、第二金属部材２０の横板２２とが平面状に接合される。 The removal step is a step of removing the auxiliary member 30 from the first metal member 10 and the second metal member 20, as shown in FIG. In the removing step, the auxiliary member 30 is bent from the first metal member 10 and the second metal member 20 by bending the auxiliary member 30 in a direction away from the first metal member 10 and the second metal member 20, for example. . Thereby, the horizontal plate 12 of the first metal member 10 and the horizontal plate 22 of the second metal member 20 are joined in a planar shape.

以上説明した第一実施形態に係る接合方法によれば、図８に示すように、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（塑性化領域Ｗ）の金属不足を防ぐことができる。
また、回転ツールＦの攪拌ピンＦ２のみを補助部材３０、第一金属部材１０および第二金属部材２０に接触させた状態で摩擦攪拌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、第一実施形態に係る接合方法では、図３、図４および図７に示すように、本接合工程および仮接合工程において、回転ツールＦの攪拌ピンＦ２のみを金属部材に接触させて摩擦攪拌しているため、入熱量を少なくすることができ、第一金属部材１０および第二金属部材２０の熱歪みを小さくすることができる。 According to the joining method which concerns on 1st embodiment demonstrated above, as shown in FIG. 8, while the 1st metal member 10 and the 2nd metal member 20 are joined, the 1st metal member 10 and the 2nd metal member In addition to 20, the auxiliary member 30 can also be friction stir welded at the same time to prevent metal shortage at the joint (plasticized region W).
Further, by performing friction stir welding in a state where only the stirring pin F2 of the rotary tool F is in contact with the auxiliary member 30, the first metal member 10, and the second metal member 20, the load acting on the friction stirrer is reduced. be able to.
In the joining method according to the first embodiment, as shown in FIGS. 3, 4, and 7, in the main joining process and the temporary joining process, only the stirring pin F <b> 2 of the rotary tool F is brought into contact with the metal member to cause friction. Since stirring is performed, the amount of heat input can be reduced, and the thermal strain of the first metal member 10 and the second metal member 20 can be reduced.

また、第一実施形態に係る接合方法では、図８に示すように、基端側の突合せ部Ｊ１に補助部材３０を配置し、補助部材３０、第一金属部材１０および第二金属部材２０を同時に摩擦攪拌接合しているため、塑性流動化した金属によって、第一金属部材１０および第二金属部材２０の角部１３，２３同士の間の隙間Ｓ（図６参照）を埋めることができる。 Moreover, in the joining method which concerns on 1st embodiment, as shown in FIG. 8, the auxiliary member 30 is arrange | positioned in the butt | matching part J1 of a base end side, and the auxiliary member 30, the 1st metal member 10, and the 2nd metal member 20 are attached. Since the friction stir welding is performed at the same time, the gap S (see FIG. 6) between the corner portions 13 and 23 of the first metal member 10 and the second metal member 20 can be filled with the plastic fluidized metal.

また、第一実施形態に係る接合方法では、図９に示すように、本接合工程によって補助部材３０にバリＶ，Ｖが形成されるが、図１０に示すように、除去工程において、バリＶを補助部材３０ごと取り除くことができる。これにより、バリＶを除去する工程を容易に行うことができる。
補助部材３０は、除去装置等を用いて除去してもよいが、第一実施形態では、手作業で容易に補助部材３０を取り除くことができる。 Further, in the joining method according to the first embodiment, as shown in FIG. 9, burrs V and V are formed in the auxiliary member 30 by the main joining process, but as shown in FIG. 10, the burrs V are removed in the removing process. Can be removed together with the auxiliary member 30. Thereby, the process of removing the burr | flash V can be performed easily.
The auxiliary member 30 may be removed by using a removing device or the like, but in the first embodiment, the auxiliary member 30 can be easily removed manually.

また、第一実施形態に係る接合方法では、仮接合工程を行うため、本接合工程を行う際の基端側の突合せ部Ｊ１及び先端側の突合せ部Ｊ２の目開きを防ぐことができる。第一実施形態では、先端側の突合せ部Ｊ２も仮接合することで目開きをより確実に防ぐことができる。
また、第一実施形態に係る接合方法では、図３および図４に示すように、回転ツールＦの攪拌ピンＦ２のみを金属部材に接触させた状態で基端側の突合せ部Ｊ１及び基端側の突合せ部Ｊ２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。 Further, in the joining method according to the first embodiment, since the temporary joining process is performed, it is possible to prevent the opening of the butt end portion J1 on the base end side and the butt end portion J2 on the distal end side when performing the main joining step. In the first embodiment, it is possible to prevent the opening more reliably by temporarily joining the butting portion J2 on the distal end side.
Further, in the joining method according to the first embodiment, as shown in FIGS. 3 and 4, the base end side butting portion J1 and the base end side in a state where only the stirring pin F2 of the rotary tool F is in contact with the metal member. By carrying out spot tacking of the butting portion J2, the load acting on the friction stirrer can be reduced. Moreover, the process time can be shortened compared with the case where temporary joining is performed on the entire length of the butt portion as in the prior art.

また、第一実施形態では、第一仮接合工程および第二仮接工程を行う回転ツールＦ（仮接合用回転ツール）と、本接合工程を行う回転ツールＦ（本接合用回転ツール）は同一の回転ツールを用いている。これにより、各工程で回転ツールの交換を行う必要が無いため作業効率を高めることができる。 Moreover, in 1st embodiment, the rotation tool F (rotary tool for temporary joining) which performs a 1st temporary joining process and a 2nd temporary joining process, and the rotational tool F (main joining rotational tool) which performs a main joining process are the same. The rotation tool is used. Thereby, since it is not necessary to replace | exchange a rotating tool at each process, work efficiency can be improved.

以上本発明の第一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、仮接合用回転ツールまたは本接合用回転ツールに、ショルダ部および攪拌ピンを備えた回転ツールを用いてもよい。また、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。 While the first embodiment of the present invention has been described above, design changes can be made as appropriate without departing from the spirit of the present invention.
For example, you may use the rotary tool provided with the shoulder part and the stirring pin for the rotary tool for temporary joining or the rotary tool for main joining. Further, different rotary tools may be used in the temporary joining step and the main joining step.

また、第一実施形態では、図２に示すように、第一金属部材１０の角部１３と第二金属部材２０の角部２３が丸面取りされており、基端側の突合せ部Ｊ１に隙間Ｓを設ける構成としたが、隙間Ｓが無いように構成してもよい。 Moreover, in 1st embodiment, as shown in FIG. 2, the corner | angular part 13 of the 1st metal member 10 and the corner | angular part 23 of the 2nd metal member 20 are chamfered, and there is a clearance gap in the butt | matching part J1 of a base end side. Although S is provided, it may be configured so that there is no gap S.

また、第一実施形態の第一仮接合工程では、図３に示すように、回転ツールＦを用いて先端側の突合せ部Ｊ２に対して仮接合を行っているが、図１１に示すように、先端側の突合せ部Ｊ２に対して溶接で仮接合を行ってもよい。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、ＴＩＧ溶接等のアーク溶接やレーザー溶接で行うことができる。そして、溶接トーチＨを先端側の突合せ部Ｊ２に近接させつつ、所定の間隔をあけてスポット仮付けを行う。このようにして、スポット仮付けを行った部分には、溶接痕Ｗ２が形成される。 Further, in the first temporary joining step of the first embodiment, as shown in FIG. 3, the rotary tool F is used to temporarily join the abutting portion J2 on the distal end side, but as shown in FIG. The temporary joining may be performed by welding on the butted portion J2 on the distal end side. At this time, the type of welding is not particularly limited, but for example, arc welding such as MIG welding or TIG welding or laser welding can be used. Then, spot welding is performed at a predetermined interval while bringing the welding torch H close to the abutting portion J2 on the front end side. In this way, a welding mark W2 is formed in the spot spot-attached portion.

また、第一仮接合工程の変形例と同様に、図１２に示すように、第二仮接合工程においても、基端側の突合せ部Ｊ１に対して溶接で仮接合を行ってもよい。この場合も溶接の種類は特に制限されない。そして、溶接トーチＨを基端側の突合せ部Ｊ１に近接させつつ、所定の間隔をあけてスポット仮付けを行う。 Similarly to the first temporary joining step, as shown in FIG. 12, in the second temporary joining step, temporary joining may be performed on the base end side butt portion J1 by welding. Also in this case, the type of welding is not particularly limited. Then, spot welding is performed with a predetermined interval while the welding torch H is brought close to the butt portion J1 on the base end side.

このように、仮接合工程において、図１１および図１２に示すように、溶接で基端側の突合せ部Ｊ１及び先端側の突合せ部Ｊ２のスポット仮付けを行う場合には、仮付けを摩擦攪拌にて行う場合より、摩擦攪拌装置に作用する負担を軽減できる。また、従来のように基端側の突合せ部Ｊ１及び先端側の突合せ部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。 Thus, in the temporary joining step, as shown in FIG. 11 and FIG. 12, when spot tacking of the butt end portion J1 and the butt end portion J2 on the proximal end side is performed by welding, The load acting on the friction stirrer can be reduced as compared with the case where the friction stirrer is performed. In addition, the process time can be shortened as compared with the conventional case where temporary joining is performed on the entire length of the base end side butting portion J1 and the distal end side butting portion J2.

［第二実施形態］
次に、本発明の第二実施形態に係る接合方法の補助部材配置工程、本接合工程および除去工程について、図１３〜図１５を参照して詳細に説明する。
第二実施形態に係る接合方法は、図１３に示すように、補助部材配置工程において、補助部材３０を第一金属部材１０および第二金属部材２０に配置する割合が第一実施形態と相違する。第二実施形態に係る接合方法では、第一実施形態の接合方法と相違する点を中心に説明する。 [Second Embodiment]
Next, the auxiliary member arranging step, the main joining step, and the removing step of the joining method according to the second embodiment of the present invention will be described in detail with reference to FIGS.
As shown in FIG. 13, the joining method according to the second embodiment is different from the first embodiment in the ratio of arranging the auxiliary member 30 on the first metal member 10 and the second metal member 20 in the auxiliary member arranging step. . The joining method according to the second embodiment will be described with a focus on differences from the joining method of the first embodiment.

第二実施形態の補助部材配置工程では、図１３に示すように、補助部材３０の９割程度を第二金属部材２０に配置し、補助部材３０の残りの１割程度を第一金属部材１０に配置する。つまり、基端側の突合せ部Ｊ１に対して補助部材３０が僅かに第一金属部材１０の横板１２の裏面１２ａに突出するように配置する。 In the auxiliary member arranging step of the second embodiment, as shown in FIG. 13, about 90% of the auxiliary member 30 is arranged on the second metal member 20, and the remaining 10% of the auxiliary member 30 is about the first metal member 10. To place. That is, the auxiliary member 30 is disposed so as to slightly protrude from the rear surface 12a of the lateral plate 12 of the first metal member 10 with respect to the abutting portion J1 on the base end side.

第二実施形態の本接合工程では、図１４に示すように、回転ツールＦ（本接合用回転ツール）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。また、本接合工程では、図１４の手前側から奥側に向けて回転ツールＦを相対移動させる。
第二実施形態の本接合工程では、右回転させた回転ツールＦの攪拌ピンＦ２のみを補助部材３０、第一金属部材１０および第二金属部材２０に接触させた状態で摩擦攪拌接合を行う。これにより、基端側の突合せ部Ｊ１において、補助部材３０、第一金属部材１０および第二金属部材２０が摩擦攪拌接合されて塑性化領域Ｗが形成される。 In the main joining step of the second embodiment, as shown in FIG. 14, the spiral groove is formed counterclockwise from the proximal end toward the distal end in order to rotate the rotary tool F (main joining rotary tool) to the right. Yes. In the main joining process, the rotary tool F is relatively moved from the near side to the far side in FIG.
In the main joining step of the second embodiment, friction stir welding is performed in a state where only the stirring pin F2 of the rotating tool F rotated to the right is in contact with the auxiliary member 30, the first metal member 10, and the second metal member 20. Thereby, in the butt | matching part J1 of a base end side, the auxiliary member 30, the 1st metal member 10, and the 2nd metal member 20 are friction-stir-welded, and the plasticization area | region W is formed.

第二実施形態では、回転ツールＦを右回転させているため、第二金属部材２０側は、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、第一金属部材１０側は、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。
回転ツールＦの回転速度が遅い場合では、塑性化領域Ｗの第二金属部材２０側に比べて、第一金属部材１０側の方が塑性流動材の温度が上昇し易くなるため、第一金属部材１０側にバリが多く発生する傾向にある。一方、回転ツールＦの回転速度が速い場合には、第一金属部材１０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、第二金属部材２０側にバリが発生する傾向にある。 In the second embodiment, since the rotary tool F is rotated to the right, the second metal member 20 side is a side where the magnitude of the feed speed is subtracted from the magnitude of the tangential speed on the outer periphery of the rotary tool F. On the other hand, the first metal member 10 side is a side on which the magnitude of the feed speed is added from the magnitude of the tangential speed on the outer periphery of the rotary tool F.
When the rotational speed of the rotary tool F is low, the temperature of the plastic fluidized material is likely to rise on the first metal member 10 side compared to the second metal member 20 side of the plasticizing region W. There is a tendency that many burrs are generated on the member 10 side. On the other hand, when the rotational speed of the rotary tool F is fast, the temperature of the plastic fluidized material is increased on the first metal member 10 side, but burrs are generated on the second metal member 20 side due to the higher rotational speed. There is a tendency.

第二実施形態の本接合工程では、回転ツールＦの回転速度を速く設定しているため、補助部材３０の第二金属部材２０側にバリＶが多く形成される。
なお、第二実施形態では、本接合工程において、第一金属部材１０側に補助部材３０が残存しないように、第一金属部材１０と補助部材３０との接触割合が調節されている。 In the main joining process of the second embodiment, since the rotation speed of the rotary tool F is set to be high, many burrs V are formed on the second metal member 20 side of the auxiliary member 30.
In the second embodiment, in the main joining step, the contact ratio between the first metal member 10 and the auxiliary member 30 is adjusted so that the auxiliary member 30 does not remain on the first metal member 10 side.

第二実施形態の除去工程では、図１５に示すように、補助部材３０を第二金属部材２０から除去することで、バリＶを片側のみに残存する補助部材３０ごと除去することができるため、バリＶを除去する工程を容易に行うことができる。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 removing process of the second embodiment, as shown in FIG. 15, by removing the auxiliary member 30 from the second metal member 20, the burr V can be removed together with the auxiliary member 30 remaining only on one side. The step of removing the burr V can be easily performed. Further, by setting the rotation speed of the rotary tool F faster, the moving speed (feed speed) of the rotary tool F can be increased. Thereby, a joining cycle can be shortened.

上記したように、本接合工程の際に、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。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）、攪拌ピンＦ２の傾斜角度、第一金属部材１０、第二金属部材２０および補助部材３０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が発生する側またはバリＶが多く発生する側に補助部材３０を配置するようにすれば、バリＶを除去する工程を容易に行うことができる。 As described above, which side of the traveling direction of the rotary tool F generates the burr V during the main joining process depends on the joining conditions. The joining conditions include the rotational speed, rotational direction, moving speed (feeding speed) of the rotary tool F, the inclination angle of the stirring pin F2, the materials of the first metal member 10, the second metal member 20, and the auxiliary member 30, and the respective members. It is determined by each element such as thickness and a combination of these elements. If the auxiliary member 30 is arranged on the side where the burrs V are generated or the side where many burrs V are generated according to the joining conditions, the step of removing the burrs V can be easily performed.

以上本発明の第二実施形態について説明したが、第一実施形態と同様に、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。 The second embodiment of the present invention has been described above. However, similar to the first embodiment, the design can be changed as appropriate without departing from the spirit of the present invention.

［第三実施形態］
次に、本発明の第三実施形態に係る接合方法の補助部材配置工程、本接合工程および除去工程について、図１６〜図１８を参照して詳細に説明する。
第三実施形態に係る接合方法では、図１６に示すように、補助部材工程において、補助部材３０を第一金属部材１０のみと面接触する点で第一実施形態と相違する。第三実施形態に係る接合方法では、第一実施形態の接合方法と相違する点を中心に説明する。 [Third embodiment]
Next, the auxiliary member arranging step, the main joining step, and the removing step of the joining method according to the third embodiment of the present invention will be described in detail with reference to FIGS.
As shown in FIG. 16, the joining method according to the third embodiment differs from the first embodiment in that the auxiliary member 30 is in surface contact with only the first metal member 10 in the auxiliary member process. The joining method according to the third embodiment will be described with a focus on differences from the joining method of the first embodiment.

第三実施形態に係る接合方法では、図１７に示すように、本接合工程において、回転ツールＦを左回転させるため、攪拌ピンＦ２の螺旋溝は、基端から先端に向かうに従って右回りに形成されている。また、本接合工程では、図１７の手前側から奥側に向けて回転ツールＦを相対移動させる。 In the joining method according to the third embodiment, as shown in FIG. 17, in the main joining step, the rotating tool F is rotated counterclockwise, so that the spiral groove of the stirring pin F2 is formed clockwise as it goes from the proximal end to the distal end. Has been. In the main joining step, the rotary tool F is relatively moved from the near side to the far side in FIG.

第三実施形態では、回転ツールＦを左回転させているため、第一金属部材１０側は、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、第二金属部材２０側は、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。
回転ツールＦの回転速度が遅い場合では、塑性化領域Ｗの第一金属部材１０側に比べて、第二金属部材２０側の方が塑性流動材の温度が上昇し易くなるため、第二金属部材２０側にバリが多く発生する傾向にある。一方、回転ツールＦの回転速度が速い場合には、第二金属部材２０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、第一金属部材１０側にバリが発生する傾向にある。 In the third embodiment, since the rotary tool F is rotated counterclockwise, the first metal member 10 side is a side on which the magnitude of the feed speed is subtracted from the magnitude of the tangential speed on the outer periphery of the rotary tool F. On the other hand, the second metal member 20 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 rotary tool F.
When the rotational speed of the rotary tool F is low, the temperature of the plastic fluidizing material is likely to rise on the second metal member 20 side compared to the first metal member 10 side of the plasticizing region W. Many burrs tend to occur on the member 20 side. On the other hand, when the rotational speed of the rotary tool F is high, the temperature of the plastic fluidized material increases on the second metal member 20 side, but burrs are generated on the first metal member 10 side due to the higher rotational speed. There is a tendency.

第三実施形態の本接合工程では、回転ツールＦの回転速度を速く設定しているため、補助部材３０のうち第一金属部材１０側にバリＶが多く形成される。
そして、第三実施形態の除去工程では、図１８に示すように、補助部材３０を第一金属部材１０から除去することで、バリＶを補助部材３０ごと除去することができる。つまり、本実施形態によれば片側のみに残存する補助部材３０およびバリＶを除去するだけでよい。 In the main joining process of the third embodiment, since the rotational speed of the rotary tool F is set high, a large number of burrs V are formed on the first metal member 10 side of the auxiliary member 30.
And in the removal process of 3rd embodiment, the burr | flash V can be removed with the auxiliary member 30 by removing the auxiliary member 30 from the 1st metal member 10, as shown in FIG. That is, according to this embodiment, it is only necessary to remove the auxiliary member 30 and the burr V remaining on only one side.

以上本発明の第三実施形態について説明したが、第一実施形態と同様に、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、補助部材配置工程において、補助部材３０を第二金属部材２０のみと面接触するように配置してもよい。この場合には、本接合工程において、補助部材３０にバリＶが発生するように、各種の接合条件を設定し、除去工程では、補助部材３０を第二金属部材２０から除去することで、バリＶを補助部材３０ごと除去することができる。また、第一仮接合工程および第二仮接合工程はいずれも省略してもよい。 The third embodiment of the present invention has been described above. However, similar to the first embodiment, the design can be changed as appropriate without departing from the spirit of the present invention.
For example, in the auxiliary member arranging step, the auxiliary member 30 may be arranged so as to be in surface contact with only the second metal member 20. In this case, various joining conditions are set so that the burrs V are generated in the auxiliary member 30 in the main joining process, and the auxiliary member 30 is removed from the second metal member 20 in the removing process. V can be removed together with the auxiliary member 30. Moreover, you may abbreviate | omit both a 1st temporary joining process and a 2nd temporary joining process.

１０第一金属部材
１１縦板
１２横板
２０第二金属部材
２１縦板
２２横板
３０補助部材
Ｆ回転ツール
Ｆ１連結部
Ｆ２攪拌ピン
Ｊ１基端側の突合せ部
Ｊ２先端側の突合せ部
Ｓ隙間
Ｖバリ
Ｗ塑性化領域 DESCRIPTION OF SYMBOLS 10 1st metal member 11 Vertical plate 12 Horizontal plate 20 2nd metal member 21 Vertical plate 22 Horizontal plate 30 Auxiliary member F Rotating tool F1 Connecting part F2 Stirring pin J1 Base end side butt part J2 Tip side butt part S Gap V Bali W Plasticization region

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で接合する接合方法であって、
前記第一金属部材および前記第二金属部材は、縦板の一方の側面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前記縦板の他方の側面と、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、
基端側の前記突合せ部を覆うように、前記第一金属部材および前記第二金属部材に補助部材を配置する補助部材配置工程と、
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、基端側の前記突合せ部に沿って前記本接合用回転ツールを移動させて、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、
バリが形成された前記補助部材を前記第一金属部材および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。 A joining method in which the first metal member and the second metal member are joined by friction stirring using a main welding rotary tool provided with a stirring pin,
The first metal member and the second metal member are formed in an L-shaped cross section in which a horizontal plate protrudes from a base end portion of one side surface of a vertical plate,
A butting step of butting the other side surface of the vertical plate of the first metal member and the other side surface of the vertical plate of the second metal member to form a butting portion;
An auxiliary member arranging step of arranging an auxiliary member on the first metal member and the second metal member so as to cover the abutting portion on the base end side;
The stirrer pin is inserted from the surface side of the auxiliary member, and only the stirrer pin is in contact with the auxiliary member, the first metal member, and the second metal member, along the butt portion on the base end side. A main joining step of moving the main joining rotary tool and performing friction stir welding of the auxiliary member, the first metal member and the second metal member;
And a removing step of removing the auxiliary member formed with burrs from the first metal member and the second metal member.

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で接合する接合方法であって、
前記第一金属部材および前記第二金属部材は、縦板の一方の側面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前記縦板の他方の側面と、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、
基端側の前記突合せ部に沿って、前記第一金属部材または前記第二金属部材に補助部材を配置する補助部材配置工程と、
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、基端側の前記突合せ部に沿って前記本接合用回転ツールを移動させて、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、
バリが形成された前記補助部材を前記第一金属部材または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。 A joining method in which the first metal member and the second metal member are joined by friction stirring using a main welding rotary tool provided with a stirring pin,
The first metal member and the second metal member are formed in an L-shaped cross section in which a horizontal plate protrudes from a base end portion of one side surface of a vertical plate,
A butting step of butting the other side surface of the vertical plate of the first metal member and the other side surface of the vertical plate of the second metal member to form a butting portion;
Auxiliary member arrangement step of arranging an auxiliary member on the first metal member or the second metal member along the abutting portion on the base end side,
The stirrer pin is inserted from the surface side of the auxiliary member, and only the stirrer pin is in contact with the auxiliary member, the first metal member, and the second metal member, along the butt portion on the base end side. A main joining step of moving the main joining rotary tool and performing friction stir welding of the auxiliary member, the first metal member and the second metal member;
And a removing step of removing the auxiliary member formed with burrs from the first metal member or the second metal member.

前記補助部材配置工程の前に、基端側の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スポットで摩擦攪拌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。 2. The preliminary joining step of performing friction stir welding at a spot by inserting only a stirring pin of a rotary tool for temporary joining into the abutting portion on the base end side before the auxiliary member arranging step. Or the joining method of Claim 2.

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 rotational tool are the same rotational tool.

前記補助部材配置工程の前に、基端側の前記突合せ部を溶接によるスポットで接合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。 The joining method according to claim 1 or 2, further comprising a temporary joining step of joining the butted portion on the base end side with a spot by welding before the auxiliary member arranging step.

前記溶接は、ＭＩＧ溶接、ＴＩＧ溶接またはレーザー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 joining 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、先端側の前記突合せ部に、仮接合用回転ツールの攪拌ピンのみを挿入してスポットで摩擦攪拌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。 2. The temporary joining step of performing friction stir welding at a spot by inserting only a stirring pin of a rotary tool for temporary joining into the abutting portion on the front end side before the auxiliary member arranging step. Or the joining method of Claim 2.

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 joining method according to claim 7, wherein the temporary joining rotary tool and the main joining rotational tool are the same rotational tool.

前記補助部材配置工程の前に、先端側の前記突合せ部を溶接によるスポットで接合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。 The joining method according to claim 1 or 2, further comprising a temporary joining step of joining the butted portion on the distal end side with a spot by welding before the auxiliary member arranging step.

前記溶接は、ＭＩＧ溶接、ＴＩＧ溶接またはレーザー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.