JP6451503B2 - Joining method - Google Patents

Joining method Download PDF

Info

Publication number
JP6451503B2
JP6451503B2 JP2015106542A JP2015106542A JP6451503B2 JP 6451503 B2 JP6451503 B2 JP 6451503B2 JP 2015106542 A JP2015106542 A JP 2015106542A JP 2015106542 A JP2015106542 A JP 2015106542A JP 6451503 B2 JP6451503 B2 JP 6451503B2
Authority
JP
Japan
Prior art keywords
metal member
inner corner
stirring pin
joining
friction stir
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2015106542A
Other languages
Japanese (ja)
Other versions
JP2016215267A (en
Inventor
堀　久司
久司 堀
伸城 瀬尾
伸城 瀬尾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Light Metal Co Ltd
Original Assignee
Nippon Light Metal Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Light Metal Co Ltd filed Critical Nippon Light Metal Co Ltd
Priority to JP2015106542A priority Critical patent/JP6451503B2/en
Publication of JP2016215267A publication Critical patent/JP2016215267A/en
Application granted granted Critical
Publication of JP6451503B2 publication Critical patent/JP6451503B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/123—Controlling or monitoring the welding process
    • B23K20/124—Controlling or monitoring the welding process at the beginning or at the end of a weld
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/1265—Non-butt welded joints, e.g. overlap-joints, T-joints or spot welds

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

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 joining method for friction stir welding of metal members.

特許文献１には、第一金属部材と第二金属部材とを重ね合せて、第一金属部材の表面と第二金属部材の端面とで構成された内隅に溶接を施す接合方法が開示されている。   Patent Document 1 discloses a joining method in which a first metal member and a second metal member are overlapped and welded to an inner corner formed by a surface of the first metal member and an end surface of the second metal member. ing.

特開２００２−１４４０６４号公報JP 2002-1444064 A

従来技術であると、溶接部の強度が低いため、第一金属部材と第二金属部材が分離するおそれがある。   In the prior art, since the strength of the welded portion is low, the first metal member and the second metal member may be separated.

このような観点から、本発明は、接合強度が高い接合方法を提供することを課題とする。   From such a viewpoint, an object of the present invention is to provide a bonding method having high bonding strength.

このような課題を解決するために本発明は、板状の第一金属部材の表面と板状の第二金属部材の裏面とを重ね合わせて重合部を形成する重ね合せ工程と、前記第一金属部材の端面と前記第二金属部材の裏面とで形成される内隅及び前記第一金属部材の表面と前記第二金属部材の端面とで形成される内隅に内隅用接合ツールの攪拌ピンを挿入して摩擦攪拌接合を行う内隅接合工程と、攪拌ピンとショルダ部とを備える回転ツールを前記第二金属部材の裏面とは反対側の表面側から挿入し、当該回転ツールの前記攪拌ピンを前記第二金属部材のみ、又は、前記第一金属部材及び前記第二金属部材の両方に接触させた状態で前記重合部に沿って当該回転ツールを相対移動させて前記重合部を摩擦攪拌接合する第一の本接合工程と、を含み、前記第一の本接合工程では、前記回転ツールの前記ショルダ部を前記第二金属部材の表面に押し込みながら摩擦攪拌接合を行うことを特徴とする。   In order to solve such a problem, the present invention includes an overlaying step of superposing the front surface of the plate-like first metal member and the back surface of the plate-like second metal member to form a superposition part, Stir the inner corner joining tool at the inner corner formed by the end surface of the metal member and the back surface of the second metal member and at the inner corner formed by the surface of the first metal member and the end surface of the second metal member. An inner corner joining process for inserting a pin to perform friction stir welding, and a rotating tool including a stirring pin and a shoulder portion are inserted from the surface side opposite to the back surface of the second metal member, and the stirring of the rotating tool is performed. Friction stirring the overlapping portion by moving the rotary tool relative to the overlapping portion while the pin is in contact with only the second metallic member or both the first metallic member and the second metallic member. A first main joining step of joining, the first In this bonding step, and carrying out friction stir welding while pushing the shoulder portion on a surface of the second metal member of the rotary tool.

かかる方法によれば、一対の内隅及び第二金属部材の表面から重合部に摩擦攪拌接合を行うことにより、重合部の接合強度を高めることができる。また、内隅接合工程を行うことにより、第一の本接合工程時における第一金属部材及び第二金属部材の位置ずれを防ぐことができる。また、第一の本接合工程では、回転ツールのショルダ部を第二金属部材に押し込むことにより、バリの発生を抑制することができる。   According to such a method, the joint strength of the overlapped portion can be increased by performing friction stir welding from the surfaces of the pair of inner corners and the second metal member to the overlapped portion. Moreover, the position shift of the 1st metal member and the 2nd metal member at the time of a 1st main joining process can be prevented by performing an inner corner joining process. Further, in the first main joining step, the occurrence of burrs can be suppressed by pushing the shoulder portion of the rotary tool into the second metal member.

また、本発明は、板状の第一金属部材の表面と板状の第二金属部材の裏面とを重ね合わせて重合部を形成する重ね合せ工程と、前記第一金属部材の端面と前記第二金属部材の裏面とで形成される内隅及び前記第一金属部材の表面と前記第二金属部材の端面とで形成される内隅に内隅用接合ツールの攪拌ピンを挿入して摩擦攪拌接合を行う内隅接合工程と、攪拌ピンを備える回転ツールを前記第二金属部材の裏面とは反対側の表面側から挿入し、当該回転ツールの前記攪拌ピンのみを前記第二金属部材のみ、又は、前記第一金属部材及び前記第二金属部材の両方に接触させた状態で前記重合部に沿って当該回転ツールを相対移動させて前記重合部を摩擦攪拌接合する第一の本接合工程と、を含むことを特徴とする。   In addition, the present invention provides an overlapping process in which the surface of the plate-shaped first metal member and the back surface of the plate-shaped second metal member are overlapped to form an overlapped portion, the end surface of the first metal member, and the first Friction stir by inserting the stirring pin of the inner corner joining tool into the inner corner formed by the back surface of the two metal member and the inner corner formed by the surface of the first metal member and the end surface of the second metal member Inserting an inner corner joining step for joining, and a rotating tool provided with a stirring pin from the surface side opposite to the back surface of the second metal member, only the stirring pin of the rotating tool only the second metal member, Or a first main joining step in which the rotating tool is relatively moved along the overlapping portion while being in contact with both the first metal member and the second metal member, and the overlapping portion is friction stir welded. , Including.

かかる方法によれば、一対の内隅及び第二金属部材の表面から重合部に摩擦攪拌接合を行うことにより、重合部の接合強度を高めることができる。また、内隅接合工程を行うことにより、第一の本接合工程時における第一金属部材及び第二金属部材の位置ずれを防ぐことができる。また、回転ツールの攪拌ピンのみを接触させて第一の本接合工程を行うことにより、摩擦攪拌装置に大きな負荷をかけずに、深い位置まで摩擦攪拌を行うことができる。   According to such a method, the joint strength of the overlapped portion can be increased by performing friction stir welding from the surfaces of the pair of inner corners and the second metal member to the overlapped portion. Moreover, the position shift of the 1st metal member and the 2nd metal member at the time of a 1st main joining process can be prevented by performing an inner corner joining process. Further, by performing only the first main joining step by bringing only the stirring pin of the rotary tool into contact, friction stirring can be performed to a deep position without applying a large load to the friction stirring device.

また、攪拌ピンとショルダ部とを備える回転ツールを前記第一金属部材の表面とは反対の裏面側から挿入し、当該回転ツールの攪拌ピンを前記第一金属部材のみ、又は、前記第一金属部材及び前記第二金属部材の両方に接触させた状態で前記重合部に沿って当該回転ツールを相対移動させて前記重合部を摩擦攪拌接合する第二の本接合工程と、を含み、前記第二の本接合工程では、当該回転ツールのショルダ部を前記第一金属部材の裏面に押し込みながら摩擦攪拌を行うとともに、前記第一の本接合工程の塑性化領域と前記第二の本接合工程の塑性化領域とを重複させることが好ましい。
また、攪拌ピンを備える回転ツールを前記第一金属部材の表面とは反対の裏面側から挿入し、当該回転ツールの攪拌ピンのみを前記第一金属部材のみ、又は、前記第一金属部材及び前記第二金属部材の両方に接触させた状態で前記重合部に沿って当該回転ツールを相対移動させて前記重合部を摩擦攪拌接合する第二の本接合工程と、を含み、
前記第二の本接合工程では、前記第一の本接合工程の塑性化領域と前記第二の本接合工程の塑性化領域とを重複させることが好ましい。 Further, a rotary tool including a stirring pin and a shoulder portion is inserted from the back side opposite to the surface of the first metal member, and the stirring pin of the rotary tool is only the first metal member or the first metal member. And a second main joining step of friction stir welding the superposed part by relatively moving the rotary tool along the superposed part in a state of being in contact with both the second metal member, and the second In the main joining step, friction stir is performed while pushing the shoulder portion of the rotating tool into the back surface of the first metal member, and the plasticization region in the first main joining step and the plasticity in the second main joining step are performed. It is preferable to overlap the control region.
Further, a rotary tool provided with a stirring pin is inserted from the back side opposite to the surface of the first metal member, and only the first metal member or the first metal member and the stirring pin of the rotary tool are inserted. A second main joining step in which the rotating tool is relatively moved along the overlapping portion in contact with both of the second metal members, and the overlapping portion is friction stir welded.
In the second main joining step, it is preferable that the plasticizing region in the first main joining step overlaps the plasticizing region in the second main joining step.

かかる方法によれば、第一金属部材の裏面側からも摩擦攪拌を施しているので接合強度をより高めることができるとともに、バランス良く接合することができる。   According to this method, since the friction stir is performed also from the back surface side of the first metal member, the bonding strength can be further increased and the bonding can be performed with a good balance.

また、本発明は、板状の第一金属部材の表面と板状の第二金属部材の裏面とを重ね合わせて重合部を形成する重ね合せ工程と、前記第一金属部材の端面と前記第二金属部材の裏面とで形成される内隅及び前記第一金属部材の表面と前記第二金属部材の端面とで形成される内隅に内隅用接合ツールの攪拌ピンを挿入して摩擦攪拌接合を行う内隅接合工程と、一対のショルダ部と前記ショルダ部間を連結する攪拌ピンとを備えるボビン回転ツールを前記重合部に沿って相対移動させて重合部を摩擦攪拌接合する本接合工程と、を含み、前記本接合工程では、一対の前記ショルダ部を前記第一金属部材及び前記第二金属部材のそれぞれ接触させた状態で摩擦攪拌を行うことを特徴とする。   In addition, the present invention provides an overlapping process in which the surface of the plate-shaped first metal member and the back surface of the plate-shaped second metal member are overlapped to form an overlapped portion, the end surface of the first metal member, and the first Friction stir by inserting the stirring pin of the inner corner joining tool into the inner corner formed by the back surface of the two metal member and the inner corner formed by the surface of the first metal member and the end surface of the second metal member An inner corner joining step for joining, and a main joining step for frictionally stirring and joining the overlapped portion by relatively moving a bobbin rotating tool including a pair of shoulder portions and a stirring pin connecting between the shoulder portions along the overlapped portion. In the main joining step, friction stir is performed in a state in which the pair of shoulder portions are in contact with the first metal member and the second metal member, respectively.

かかる方法によれば、一対の内隅と重合部とに摩擦攪拌接合を行うことにより、接合強度を高めることができる。また、内隅接合工程を行うことにより、本接合工程時における第一金属部材及び第二金属部材の位置ずれを防ぐことができる。また、ボビン回転ツールを用いて本接合工程を行うことにより、第一金属部材及び第二金属部材の板厚方向の全体を１パスで接合することができる。   According to such a method, joint strength can be increased by performing friction stir welding on the pair of inner corners and the overlapped portion. Moreover, the position shift of the 1st metal member and the 2nd metal member at the time of this joining process can be prevented by performing an inner corner joining process. Moreover, the whole joining process of the 1st metal member and the 2nd metal member can be joined by 1 pass by performing this joining process using a bobbin rotation tool.

また、前記内隅接合工程では、前記内隅に対して、１パスで連続して摩擦攪拌を施すことが好ましい。また、前記内隅接合工程では、前記内隅に対して、断続的に間をあけて摩擦攪拌を施すことが好ましい。かかる方法によれば、内隅接合工程を容易に行うことができる。   In the inner corner joining step, it is preferable that the inner corner is continuously subjected to friction stirring in one pass. In the inner corner joining step, it is preferable that the inner corner is intermittently spaced to perform friction stirring. According to this method, the inner corner joining process can be easily performed.

本発明に係る接合方法によれば、接合強度を高めることができる。   According to the joining method according to the present invention, the joining strength can be increased.

本発明で用いる内隅用接合ツール及び回転ツールを示す図であって、（ａ）は側面図であり、（ｂ）は接合状態を示す断面図である。It is a figure which shows the joining tool for inner corners and rotation tool which are used by this invention, Comprising: (a) is a side view, (b) is sectional drawing which shows a joining state. （ａ）は、本発明の第一実施形態に係る接合方法の突合せ工程を示す図であり、（ｂ）は内隅接合工程を示す斜視図である。(A) is a figure which shows the butt | matching process of the joining method which concerns on 1st embodiment of this invention, (b) is a perspective view which shows an inner corner joining process. 本発明の第一実施形態に係る接合方法のタブ材接合工程を示す斜視図である。It is a perspective view which shows the tab material joining process of the joining method which concerns on 1st embodiment of this invention. 第一実施形態に係る接合方法の第一の本接合工程を示す図であって、（ａ）は斜視図であり、（ｂ）は断面図である。It is a figure which shows the 1st main joining process of the joining method which concerns on 1st embodiment, Comprising: (a) is a perspective view, (b) is sectional drawing. 第一実施形態に係る接合方法の第二の本接合工程を示す断面図である。It is sectional drawing which shows the 2nd main joining process of the joining method which concerns on 1st embodiment. 本発明の第二実施形態に係る接合方法の第一の本接合工程を示す図であって、（ａ）は斜視図であり、（ｂ）は断面図である。It is a figure which shows the 1st main joining process of the joining method which concerns on 2nd embodiment of this invention, Comprising: (a) is a perspective view, (b) is sectional drawing. 第二実施形態に係る接合方法の第二の本接合工程を示す断面図である。It is sectional drawing which shows the 2nd main joining process of the joining method which concerns on 2nd embodiment. 第三実施形態に係る接合方法のボビンツールを示す斜視図である。It is a perspective view which shows the bobbin tool 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図であり、（ａ）は斜視図であり、（ｂ）は断面図である。It is a figure which shows the main joining process of the joining method which concerns on 3rd embodiment, (a) is a perspective view, (b) is sectional drawing.

［第一実施形態］
本発明の第一実施形態に係る接合方法について図面を参照して詳細に説明する。まずは、本実施形態の接合方法で用いる回転ツールＦについて説明する。図１の（ａ）に示すように、回転ツールＦは、連結部Ｆ１と、攪拌ピンＦ２とで構成されている。回転ツールＦは、例えば工具鋼で形成されている。連結部Ｆ１は、摩擦攪拌装置の回転軸に連結される部位である。連結部Ｆ１は円柱状を呈し、ボルトが締結されるネジ孔（図示省略）が形成されている。 [First embodiment]
A joining method according to a first embodiment of the present invention will be described in detail with reference to the drawings. First, the rotating tool F used in the joining method of this embodiment will be described. As shown to (a) of FIG. 1, the rotary tool F is comprised by the connection part F1 and the stirring pin F2. The rotary tool F is made of, for example, tool steel. The connecting part F1 is a part connected to the rotating shaft of the friction stirrer. The connecting portion F1 has a cylindrical shape, and is formed with a screw hole (not shown) in which a bolt is fastened.

攪拌ピンＦ２は、連結部Ｆ１から垂下しており、連結部Ｆ１と同軸になっている。攪拌ピンＦ２は連結部Ｆ１から離間するにつれて先細りになっている。攪拌ピンＦ２の長さは、後記する第二金属部材２の板厚よりも大きくなっている。攪拌ピンＦ２の外周面には螺旋溝Ｆ３が刻設されている。本実施形態では、回転ツールＦを右回転させるため、螺旋溝Ｆ３は、基端から先端に向かうにつれて左回りに形成されている。言い換えると、螺旋溝Ｆ３は、螺旋溝Ｆ３を基端から先端に向けてなぞると上から見て左回りに形成されている。   The stirring pin F2 hangs down from the connecting portion F1 and is coaxial with the connecting portion F1. The stirring pin F2 is tapered as it is separated from the connecting portion F1. The length of the stirring pin F2 is larger than the plate thickness of the second metal member 2 described later. A spiral groove F3 is formed on the outer peripheral surface of the stirring pin F2. In the present embodiment, in order to rotate the rotary tool F to the right, the spiral groove F3 is formed counterclockwise from the base end toward the tip. In other words, the spiral groove F3 is formed counterclockwise as viewed from above when the spiral groove F3 is traced from the base end to the tip.

なお、回転ツールＦを左回転させる場合は、螺旋溝Ｆ３を基端から先端に向かうにつれて右回りに形成することが好ましい。言い換えると、この場合の螺旋溝Ｆ３は、螺旋溝Ｆ３を基端から先端に向けてなぞると上から見て右回りに形成されている。螺旋溝Ｆ３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Ｆ３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（後記する第一金属部材１及び第二金属部材２）の外部に溢れ出る金属の量を少なくすることができる。   In addition, when rotating the rotation tool F counterclockwise, it is preferable to form the spiral groove F3 clockwise as it goes from the proximal end to the distal end. In other words, the spiral groove F3 in this case is formed clockwise when viewed from above when the spiral groove F3 is traced from the proximal end to the distal end. By setting the spiral groove F3 in this way, the plastic fluidized metal at the time of frictional stirring is guided to the tip side of the stirring pin F2 by the spiral groove F3. Thereby, the quantity of the metal which overflows outside the to-be-joined metal member (the 1st metal member 1 and the 2nd metal member 2 which are mentioned later) can be decreased.

図１の（ｂ）に示すように、回転ツールＦを用いて摩擦攪拌接合をする際には、被接合金属部材に回転した攪拌ピンＦ２のみを挿入し、被接合金属部材と連結部Ｆ１とは離間させつつ移動させる。言い換えると、攪拌ピンＦ２の基端部は露出させた状態で摩擦攪拌接合を行う。回転ツールＦの移動軌跡には摩擦攪拌された金属が硬化することにより塑性化領域Ｗ（Ｗ１，Ｗ２）が形成される。   As shown in FIG. 1B, when the friction stir welding is performed using the rotary tool F, only the rotated stirring pin F2 is inserted into the metal member to be joined, and the metal member to be joined and the connecting portion F1 are connected. Is moved while being separated. In other words, the friction stir welding is performed with the base end portion of the stirring pin F2 exposed. A plasticized region W (W1, W2) is formed on the movement trajectory of the rotary tool F by hardening of the friction-stirred metal.

図２の（ａ）に示すように、本実施形態に係る接合方法では、第一金属部材１と第二金属部材２とを重ね合せて摩擦攪拌により接合する。第一金属部材１及び第二金属部材２は、いずれも板状を呈する。第一金属部材１及び第二金属部材２の板厚は、異なるように形成してもよいが、本実施形態では同一である。第一金属部材１及び第二金属部材２は、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。   As shown in FIG. 2A, in the joining method according to this embodiment, the first metal member 1 and the second metal member 2 are overlapped and joined by friction stirring. Both the first metal member 1 and the second metal member 2 have a plate shape. Although the plate | board thickness of the 1st metal member 1 and the 2nd metal member 2 may be formed so that it may differ, in this embodiment, it is the same. The first metal member 1 and the second metal member 2 are appropriately selected from metals capable of friction stirring such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, magnesium alloy and the like.

本実施形態に係る接合方法では、重ね合せ工程と、内隅接合工程と、タブ材接合工程と、第一の本接合工程と、第二の本接合工程とを行う。重ね合せ工程は、図２の（ａ）示すように、第一金属部材１の表面１ａと第二金属部材２の裏面２ｂとを重ね合せて重合部Ｊ１を形成する工程である。第一金属部材１及び第二金属部材２は架台（図示省略）にクランプを介して移動不能に拘束する。第一金属部材１の表面１ａと、第二金属部材２の端面２ｃとで内隅Ｕ１が形成される。第二金属部材２の裏面２ｂと、第一金属部材１の端面１ｃとで内隅Ｕ２が形成される。なお、「表面」とは、「裏面」とは反対側の面を意味する。   In the bonding method according to the present embodiment, an overlapping process, an inner corner bonding process, a tab material bonding process, a first main bonding process, and a second main bonding process are performed. As shown in FIG. 2A, the overlapping step is a step in which the superposed portion J1 is formed by overlapping the front surface 1a of the first metal member 1 and the back surface 2b of the second metal member 2. The 1st metal member 1 and the 2nd metal member 2 are restrained so that it cannot move via a clamp to a stand (illustration omitted). An inner corner U1 is formed by the surface 1a of the first metal member 1 and the end surface 2c of the second metal member 2. An inner corner U <b> 2 is formed by the back surface 2 b of the second metal member 2 and the end surface 1 c of the first metal member 1. The “front surface” means a surface opposite to the “back surface”.

内隅接合工程は、図２の（ｂ）に示すように、内隅Ｕ１，Ｕ２に対して回転ツール（内隅用接合ツール）Ｆを用いて摩擦攪拌接合を行う工程である。内隅接合工程では、回転させた回転ツールＦの攪拌ピンＦ２のみを内隅Ｕ１に挿入しつつ、内隅Ｕ１に沿って回転ツールＦを相対移動させる。つまり、回転ツールＦの連結部Ｆ１は被接合金属部材に接触させずに攪拌ピンＦ２の基端側を露出させて摩擦攪拌接合を行う。本実施形態では、内隅Ｕ１の全長に対して１パスで連続的に摩擦攪拌接合を行う。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。また同様に、内隅Ｕ２に対しても摩擦攪拌接合を行う。   The inner corner joining step is a step of performing friction stir welding on the inner corners U1 and U2 using a rotary tool (inner corner joining tool) F as shown in FIG. 2 (b). In the inner corner joining step, the rotating tool F is relatively moved along the inner corner U1 while only the stirring pin F2 of the rotated rotating tool F is inserted into the inner corner U1. That is, the connecting portion F1 of the rotary tool F performs the friction stir welding by exposing the base end side of the stirring pin F2 without contacting the metal member to be joined. In the present embodiment, friction stir welding is continuously performed in one pass over the entire length of the inner corner U1. A plasticized region W is formed on the movement locus of the rotary tool F. Similarly, friction stir welding is also performed on the inner corner U2.

なお、内隅接合工程は、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ロボットアームに回転ツールＦを取り付けて摩擦攪拌を行うことができる。このような摩擦攪拌装置によれば、鉛直軸に対する回転ツールＦの回転中心軸の角度を容易に変更することができる。   In the inner corner joining step, for example, the rotating tool F can be attached to a robot arm having a rotation driving means such as a spindle unit at the tip, and friction stirring can be performed. According to such a friction stirrer, the angle of the rotation center axis of the rotary tool F with respect to the vertical axis can be easily changed.

タブ材接合工程は、図３に示すように、重合部Ｊ１の両側にタブ材Ｔ１，Ｔ２を接合する工程である。タブ材Ｔ１，Ｔ２は、第一金属部材１及び第二金属部材２と同じ材料で形成されており直方体を呈する。タブ材Ｔ１，Ｔ２の高さは、第一金属部材１及び第二金属部材２の板厚方向の和と同等になっている。タブ材接合工程では、タブ材Ｔ１と第一金属部材１及び第二金属部材２とで形成される内隅を溶接により接合する。同様に、タブ材Ｔ２と第一金属部材１及び第二金属部材２とで形成される内隅を溶接により接合する。タブ材Ｔ１の表面Ｔ１ａと第二金属部材２の表面２ａとを面一にするとともに、裏面Ｔ１ｂと第一金属部材１の裏面１ｂとを面一にする。同様に、タブ材Ｔ２の表面Ｔ２ａと第二金属部材２の表面２ａとを面一にするとともに、裏面Ｔ２ｂと第一金属部材１の裏面１ｂを面一にする。   As shown in FIG. 3, the tab material joining step is a step of joining the tab materials T1 and T2 to both sides of the overlapping portion J1. Tab material T1, T2 is formed with the same material as the 1st metal member 1 and the 2nd metal member 2, and exhibits a rectangular parallelepiped. The height of the tab materials T1 and T2 is equal to the sum of the first metal member 1 and the second metal member 2 in the plate thickness direction. In the tab material joining step, the inner corner formed by the tab material T1, the first metal member 1 and the second metal member 2 is joined by welding. Similarly, the inner corner formed by the tab material T2, the first metal member 1 and the second metal member 2 is joined by welding. The surface T1a of the tab member T1 and the surface 2a of the second metal member 2 are flush with each other, and the back surface T1b and the back surface 1b of the first metal member 1 are flush with each other. Similarly, the surface T2a of the tab member T2 and the surface 2a of the second metal member 2 are flush with each other, and the back surface T2b and the back surface 1b of the first metal member 1 are flush with each other.

第一の本接合工程は、図４の（ａ）に示すように、第二金属部材２の表面２ａ側から重合部Ｊ１を摩擦攪拌接合する工程である。第一の本接合工程では、回転ツールＧを用いて接合する。回転ツールＧは、円柱状のショルダ部Ｇ１と、ショルダ部Ｇ１から垂下する攪拌ピンＧ２とで構成されている。攪拌ピンＧ２は先端に向けて先細りになっている。攪拌ピンＧ２の外周面には螺旋溝が形成されている。   The first main joining step is a step of friction stir welding the superposed portion J1 from the surface 2a side of the second metal member 2 as shown in FIG. In the first main joining process, the rotating tool G is used for joining. The rotary tool G includes a columnar shoulder portion G1 and a stirring pin G2 that hangs down from the shoulder portion G1. The stirring pin G2 is tapered toward the tip. A spiral groove is formed on the outer peripheral surface of the stirring pin G2.

第一の本接合工程では、タブ材Ｔ１の表面Ｔ１ａに開始位置Ｓｐ１を設定し、タブ材Ｔ２の表面Ｔ２ａに終了位置Ｅｐ１を設定する。第一の本接合工程では、開始位置Ｓｐ１に回転する回転ツールＧの攪拌ピンＧ２を挿入する。そして、重合部Ｊ１に沿うようにして、回転ツールＧを終了位置Ｅｐ１に向けて相対移動させる。回転ツールＧの移動軌跡には、塑性化領域Ｗ１が形成される。   In the first main joining step, a start position Sp1 is set on the surface T1a of the tab material T1, and an end position Ep1 is set on the surface T2a of the tab material T2. In the first main joining step, the stirring pin G2 of the rotating tool G that rotates to the start position Sp1 is inserted. Then, the rotary tool G is relatively moved toward the end position Ep1 along the overlapping portion J1. A plasticized region W1 is formed in the movement locus of the rotary tool G.

図４の（ｂ）に示すように、第一の本接合工程では、回転ツールＧのショルダ部Ｇ１の下端面を第二金属部材２に数ミリ程度押し込みながら摩擦攪拌を行う。攪拌ピンＧ２の挿入深さは適宜設定すればよいが、重合部Ｊ１に攪拌ピンＧ２が達するように設定することが好ましい。つまり、攪拌ピンＧ２を第一金属部材１及び第二金属部材２の両方に接触させた状態で摩擦攪拌接合を行う。   As shown in FIG. 4B, in the first main joining step, friction stirring is performed while pushing the lower end surface of the shoulder portion G1 of the rotary tool G into the second metal member 2 by about several millimeters. The insertion depth of the stirring pin G2 may be set as appropriate, but is preferably set so that the stirring pin G2 reaches the overlapping portion J1. That is, friction stir welding is performed in a state where the stirring pin G2 is in contact with both the first metal member 1 and the second metal member 2.

攪拌ピンＧ２が重合部Ｊ１に達しない場合、つまり、攪拌ピンＧ２を第二金属部材２のみに接触させる場合は、回転ツールＧと第二金属部材２との摩擦熱によって重合部Ｊ１が塑性流動化して接合される。回転ツールＧが終了位置Ｅｐ１に達したら、回転ツールＧをタブ材Ｔ２から離脱させる。第一の本接合工程が終了したら、第一金属部材１及び第二金属部材２をひっくり返し、架台に再度クランプする。   When the stirring pin G2 does not reach the overlapping portion J1, that is, when the stirring pin G2 is brought into contact only with the second metal member 2, the overlapping portion J1 is plastically flowed by frictional heat between the rotary tool G and the second metal member 2. To be joined. When the rotary tool G reaches the end position Ep1, the rotary tool G is detached from the tab material T2. When the first main joining process is completed, the first metal member 1 and the second metal member 2 are turned over and clamped again on the gantry.

第二の本接合工程は、図５に示すように、第一金属部材１の裏面１ｂ側から重合部Ｊ１を摩擦攪拌接合する工程である。第二の本接合工程では、回転ツールＧを用いて接合する。第二の本接合工程では、タブ材Ｔ１及びタブ材Ｔ２の一方に開始位置を設定し、他方に終了位置を設定する。第二の本接合工程では、第一の本接合工程と同じ要領で摩擦攪拌接合を行う。つまり、回転ツールＧのショルダ部Ｇ１の下端面を第一金属部材１の裏面１ｂに数ミリ程度押し込みつつ、重合部Ｊ１に沿って回転ツールＧを相対移動させて摩擦攪拌を行う。回転ツールＧの移動軌跡には、塑性化領域Ｗ２が形成される。   As shown in FIG. 5, the second main joining step is a step of friction stir welding the overlapping portion J <b> 1 from the back surface 1 b side of the first metal member 1. In the second main joining step, the rotating tool G is used for joining. In the second main joining step, a start position is set for one of the tab material T1 and the tab material T2, and an end position is set for the other. In the second main joining step, friction stir welding is performed in the same manner as in the first main joining step. That is, while the lower end surface of the shoulder portion G1 of the rotary tool G is pushed into the back surface 1b of the first metal member 1 by several millimeters, the rotary tool G is relatively moved along the overlapping portion J1 to perform friction stirring. A plasticized region W2 is formed in the movement locus of the rotary tool G.

第二の本接合工程における攪拌ピンＧ２の挿入深さは適宜設定すればよいが、本実施形態では、重合部Ｊ１に攪拌ピンＧ２が達するように設定することが好ましい。つまり、攪拌ピンＧ２を第一金属部材１及び第二金属部材２の両方に接触させた状態で摩擦攪拌接合を行う。攪拌ピンＧ２の先端が、塑性化領域Ｗ１に入り込むように挿入深さを設定することで、塑性化領域Ｗ１と塑性化領域Ｗ２とが重複する。   The insertion depth of the stirring pin G2 in the second main joining step may be set as appropriate, but in the present embodiment, it is preferable to set the stirring pin G2 so as to reach the overlapping portion J1. That is, friction stir welding is performed in a state where the stirring pin G2 is in contact with both the first metal member 1 and the second metal member 2. By setting the insertion depth so that the tip of the stirring pin G2 enters the plasticizing region W1, the plasticizing region W1 and the plasticizing region W2 overlap.

攪拌ピンＧ２が重合部Ｊ１に達しない場合、つまり、攪拌ピンＧ２を第一金属部材１のみに接触させる場合は、回転ツールＧと第一金属部材１との摩擦熱によって重合部Ｊ１が塑性流動化して接合される。回転ツールＧが終了位置に達したら、回転ツールＧをタブ材から離脱させる。以上により、第一金属部材１と第二金属部材２とが接合される。   When the stirring pin G2 does not reach the overlapping portion J1, that is, when the stirring pin G2 is brought into contact only with the first metal member 1, the overlapping portion J1 is plastically flowed by frictional heat between the rotary tool G and the first metal member 1. To be joined. When the rotary tool G reaches the end position, the rotary tool G is detached from the tab material. Thus, the first metal member 1 and the second metal member 2 are joined.

なお、必要に応じて、内隅接合工程、第一の本接合工程及び第二の本接合工程で発生したバリを切除するバリ切除工程を行ってもよい。これにより、内隅Ｕ１，Ｕ２、第一金属部材１の裏面１ｂ及び第二金属部材２の表面２ａをきれいに仕上げることができる。   In addition, you may perform the burr cutting process which cuts the burr | flash which generate | occur | produced in the inner corner joining process, the 1st main joining process, and the 2nd main joining process as needed. Thereby, the inner corners U1 and U2, the back surface 1b of the first metal member 1, and the surface 2a of the second metal member 2 can be finished finely.

以上説明した第一実施形態に係る接合方法によれば、一対の内隅Ｕ１，Ｕ２に加えて、第二金属部材２の表面２ａから重合部Ｊ１に摩擦攪拌接合を行うことにより、重合部Ｊ１の接合強度を高めることができる。また、内隅接合工程を行うことにより、第一の本接合工程時における第一金属部材１及び第二金属部材２の位置ずれを防ぐことができる。また、ショルダ部Ｇ１を第二金属部材２に押し込むことにより、バリの発生を抑制することができる。また、第二の本接合工程は省略してもよいが、本実施形態のように第一の本接合工程及び第二の本接合工程の両方を行うことで、接合強度をより高めることができるとともに、バランス良く接合することができる。   According to the joining method according to the first embodiment described above, in addition to the pair of inner corners U1 and U2, by performing friction stir welding from the surface 2a of the second metal member 2 to the overlapping portion J1, the overlapping portion J1. It is possible to increase the bonding strength. Moreover, the position shift of the 1st metal member 1 and the 2nd metal member 2 at the time of a 1st main joining process can be prevented by performing an inner corner joining process. Further, by pushing the shoulder portion G1 into the second metal member 2, the generation of burrs can be suppressed. Moreover, although the 2nd main joining process may be abbreviate | omitted, joining strength can be raised more by performing both a 1st main joining process and a 2nd main joining process like this embodiment. At the same time, it can be joined in a balanced manner.

［第二実施形態］
次に、本発明の第二実施形態に係る接合方法について説明する。本実施形態では、内隅接合工程、第一の本接合工程及び第二の本接合工程を、回転ツールＦを用いて摩擦攪拌接合する点で、第一実施形態と相違する。本実施形態に係る接合方法では、重ね合せ工程と、内隅接合工程と、タブ材接合工程と、第一の本接合工程と、第二の本接合工程とを行う。重ね合せ工程は、第一実施形態と同一であるため、説明を省略する。 [Second Embodiment]
Next, the joining method according to the second embodiment of the present invention will be described. This embodiment is different from the first embodiment in that the inner corner joining step, the first main joining step, and the second main joining step are friction stir welded using the rotary tool F. In the bonding method according to the present embodiment, an overlapping process, an inner corner bonding process, a tab material bonding process, a first main bonding process, and a second main bonding process are performed. Since the overlapping process is the same as that of the first embodiment, the description thereof is omitted.

内隅接合工程では、図６の（ａ）に示すように、内隅Ｕ１，Ｕ２に対して回転ツール（内隅用接合ツール）Ｆを用いて摩擦攪拌接合を行う工程である。内隅接合工程では、内隅Ｕ１，Ｕ２の全長に対して、断続的に摩擦攪拌を行う。内隅Ｕ１，Ｕ２には、間隔をあけて塑性化領域Ｗが形成される。タブ材接合工程は、第一実施形態と同一であるため、説明を省略する。   In the inner corner joining step, as shown in FIG. 6A, friction stir welding is performed on the inner corners U <b> 1 and U <b> 2 using a rotating tool (inner corner joining tool) F. In the inner corner joining step, friction stirring is intermittently performed on the entire length of the inner corners U1 and U2. A plasticized region W is formed in the inner corners U1 and U2 with a space therebetween. Since the tab material joining step is the same as that in the first embodiment, description thereof is omitted.

第一の本接合工程は、図６の（ａ）に示すように、第二金属部材２の表面２ａ側から重合部Ｊ１を摩擦攪拌接合する工程である。第一の本接合工程では、回転ツール（内隅用接合ツールと兼用のショルダレス回転ツール）Ｆを用いて接合する。   The first main joining step is a step of friction stir welding the superposed portion J1 from the surface 2a side of the second metal member 2 as shown in FIG. In the first main joining step, joining is performed using a rotating tool (a shoulderless rotating tool that also serves as an inner corner joining tool) F.

第一の本接合工程では、タブ材Ｔ１の表面Ｔ１ａに開始位置Ｓｐ１を設定し、タブ材Ｔ２の表面Ｔ２ａに終了位置Ｅｐ１を設定する。第一の本接合工程では、開始位置Ｓｐ１に右回転させた回転ツールＦの攪拌ピンＦ２を挿入する。そして、重合部Ｊ１に沿うようにして、回転ツールＦを終了位置Ｅｐ１に向けて相対移動させる。回転ツールＦの移動軌跡には、塑性化領域Ｗ１が形成される。   In the first main joining step, a start position Sp1 is set on the surface T1a of the tab material T1, and an end position Ep1 is set on the surface T2a of the tab material T2. In the first main joining step, the stirring pin F2 of the rotating tool F rotated to the right is inserted into the start position Sp1. Then, the rotary tool F is relatively moved toward the end position Ep1 along the overlapping portion J1. A plasticizing region W1 is formed on the movement locus of the rotary tool F.

図６の（ｂ）に示すように、第一の本接合工程では、回転ツールＦの連結部Ｆ１は第二金属部材２から離間させて、摩擦攪拌接合を行う。つまり、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。攪拌ピンＦ２の挿入深さは適宜設定すればよいが、重合部Ｊ１に攪拌ピンＦ２が達するように設定することが好ましい。つまり、攪拌ピンＦ２を第一金属部材１及び第二金属部材２の両方に接触させた状態で摩擦攪拌接合を行う。   As shown in FIG. 6B, in the first main joining step, the connecting portion F1 of the rotary tool F is separated from the second metal member 2 to perform friction stir welding. That is, the friction stir welding is performed with the base end side of the stirring pin F2 exposed. The insertion depth of the stirring pin F2 may be set as appropriate, but is preferably set so that the stirring pin F2 reaches the overlapping portion J1. That is, friction stir welding is performed in a state where the stirring pin F <b> 2 is in contact with both the first metal member 1 and the second metal member 2.

攪拌ピンＦ２が重合部Ｊ１に達しない場合、つまり、攪拌ピンＦ２を第二金属部材２のみに接触させる場合は、回転ツールＦと第二金属部材２との摩擦熱によって重合部Ｊ１が塑性流動化して接合される。回転ツールＦが終了位置Ｅｐ１に達したら、回転ツールＦをタブ材Ｔ２から離脱させる。第一の本接合工程が終了したら、第一金属部材１及び第二金属部材２をひっくり返し、架台に再度クランプする。   When the stirring pin F2 does not reach the overlapping portion J1, that is, when the stirring pin F2 is brought into contact with only the second metal member 2, the overlapping portion J1 is plastically flowed by frictional heat between the rotary tool F and the second metal member 2. To be joined. When the rotary tool F reaches the end position Ep1, the rotary tool F is detached from the tab material T2. When the first main joining process is completed, the first metal member 1 and the second metal member 2 are turned over and clamped again on the gantry.

第二の本接合工程は、図７に示すように、第一金属部材１の裏面１ｂ側から重合部Ｊ１を接合する工程である。第二の本接合工程では、回転ツールＦを用いて摩擦攪拌によって接合する。第二の本接合工程では、タブ材Ｔ１及びタブ材Ｔ２の一方に開始位置を設定し、他方に終了位置を設定する。第二の本接合工程では、第一の本接合工程と同じ要領で摩擦攪拌接合を行う。つまり、回転ツールＦの連結部Ｆ１は第一金属部材１から離間させて、摩擦攪拌接合を行う。回転ツールＦの移動軌跡には、塑性化領域Ｗ２が形成される。   The second main joining step is a step of joining the overlapping portion J1 from the back surface 1b side of the first metal member 1 as shown in FIG. In the second main joining step, the rotary tool F is used to join by friction stirring. In the second main joining step, a start position is set for one of the tab material T1 and the tab material T2, and an end position is set for the other. In the second main joining step, friction stir welding is performed in the same manner as in the first main joining step. That is, the connecting portion F1 of the rotary tool F is separated from the first metal member 1 to perform friction stir welding. A plasticizing region W2 is formed in the movement locus of the rotary tool F.

第二の本接合工程における攪拌ピンＦ２の挿入深さは適宜設定すればよいが、本実施形態では、重合部Ｊ１に攪拌ピンＦ２が達するように設定することが好ましい。つまり、攪拌ピンＦ２を第一金属部材１及び第二金属部材２の両方に接触させた状態で摩擦攪拌接合を行う。攪拌ピンＦ２の先端が、塑性化領域Ｗ１に入り込むように挿入深さを設定することで、塑性化領域Ｗ１と塑性化領域Ｗ２の先端側が重複する。   The insertion depth of the stirring pin F2 in the second main joining step may be set as appropriate, but in the present embodiment, it is preferable to set so that the stirring pin F2 reaches the overlapping portion J1. That is, friction stir welding is performed in a state where the stirring pin F <b> 2 is in contact with both the first metal member 1 and the second metal member 2. By setting the insertion depth so that the tip of the stirring pin F2 enters the plasticizing region W1, the tip side of the plasticizing region W1 and the plasticizing region W2 overlap.

攪拌ピンＦ２が重合部Ｊ１に達しない場合、つまり、攪拌ピンＦ２を第一金属部材１のみに接触させる場合は、回転ツールＦと第一金属部材１との摩擦熱によって重合部Ｊ１が塑性流動化して接合される。回転ツールＦが終了位置に達したら、回転ツールＦをタブ材から離脱させる。以上により、第一金属部材１と第二金属部材２とが接合される。   When the stirring pin F2 does not reach the overlapping portion J1, that is, when the stirring pin F2 is brought into contact only with the first metal member 1, the overlapping portion J1 is plastically flowed by frictional heat between the rotary tool F and the first metal member 1. To be joined. When the rotary tool F reaches the end position, the rotary tool F is detached from the tab material. Thus, the first metal member 1 and the second metal member 2 are joined.

なお、必要に応じて、内隅Ｕ１，Ｕ２、第一の本接合工程及び第二の本接合工程で発生したバリを切除するバリ切除工程を行ってもよい。これにより、第一金属部材１の裏面１ｂ及び第二金属部材２の表面２ａをきれいに仕上げることができる。また、第一金属部材１の裏面１ｂ及び第二金属部材２の表面２ａに形成される凹溝が大きい場合は、肉盛溶接を施して補修する補修工程を行ってもよい。   In addition, you may perform the burr cutting process which cuts out the burr | flash which generate | occur | produced in inner corner U1, U2, the 1st main joining process, and the 2nd main joining process as needed. Thereby, the back surface 1b of the 1st metal member 1 and the surface 2a of the 2nd metal member 2 can be finished finely. Moreover, when the recessed groove formed in the back surface 1b of the 1st metal member 1 and the surface 2a of the 2nd metal member 2 is large, you may perform the repair process which performs overlay welding and repairs.

第二実施形態に係る接合方法によれば、一対の内隅Ｕ１，Ｕ２に加えて、第二金属部材２の表面２ａから重合部Ｊ１に摩擦攪拌接合を行うことにより、重合部Ｊ１の接合強度を高めることができる。また、内隅接合工程を行うことにより、第一の本接合工程時における第一金属部材１及び第二金属部材２の位置ずれを防ぐことができる。また、回転ツールＦの攪拌ピンＦ２のみを接触させて第一の本接合工程を行うことにより、摩擦攪拌装置に大きな負荷をかけずに、深い位置まで摩擦攪拌を行うことができる。第一金属部材１及び第二金属部材２の板厚が大きい場合は、回転ツールＦを用いて摩擦攪拌を行うと有効である。   According to the joining method according to the second embodiment, in addition to the pair of inner corners U1 and U2, by performing friction stir welding from the surface 2a of the second metal member 2 to the superposed part J1, the joint strength of the superposed part J1 Can be increased. Moreover, the position shift of the 1st metal member 1 and the 2nd metal member 2 at the time of a 1st main joining process can be prevented by performing an inner corner joining process. Further, by performing only the first main joining step by bringing only the stirring pin F2 of the rotary tool F into contact, friction stirring can be performed to a deep position without applying a large load to the friction stirring device. When the plate thickness of the first metal member 1 and the second metal member 2 is large, it is effective to perform friction stirring using the rotary tool F.

また、回転ツールＦによれば、塑性化領域Ｗ１，Ｗ２の幅を小さくすることができるため、重合部Ｊ１の幅（第一金属部材１と第二金属部材２の重ね代）を小さくすることができる。また、第二の本接合工程は省略してもよいが、本実施形態のように第一の本接合工程及び第二の本接合工程の両方を行うことで、接合強度をより高めることができるとともに、バランス良く接合することができる。   In addition, according to the rotating tool F, the width of the plasticized regions W1, W2 can be reduced, so that the width of the overlapping portion J1 (the overlap margin of the first metal member 1 and the second metal member 2) is reduced. Can do. Moreover, although the 2nd main joining process may be abbreviate | omitted, joining strength can be raised more by performing both a 1st main joining process and a 2nd main joining process like this embodiment. At the same time, it can be joined in a balanced manner.

また、内隅用接合ツールは、第一の本接合工程及び第二の本接合工程で用いる回転ツールと別個でもよいが、本実施形態のようにこれらの工程を回転ツールＦを用いて行うことで、回転ツールを付け替える手間を省くことができる。   The inner corner joining tool may be separate from the rotary tool used in the first main joining step and the second main joining step, but these steps are performed using the rotary tool F as in the present embodiment. This saves the trouble of changing the rotating tool.

なお、第二実施形態では、回転ツールＦを用いて内隅接合工程、第一の本接合工程及び第二の本接合工程を行ったが、回転ツールＧを用いて各工程を行ってもよい。この場合は、回転ツールＧの攪拌ピンＧ２の基端側を露出させた状態で摩擦攪拌接合を行えばよい。このようにすれば、回転ツールを交換する手間を省略することができる。   In the second embodiment, the inner corner joining step, the first main joining step, and the second main joining step are performed using the rotating tool F. However, each step may be performed using the rotating tool G. . In this case, the friction stir welding may be performed with the proximal end side of the stirring pin G2 of the rotary tool G exposed. In this way, the trouble of replacing the rotating tool can be omitted.

［第三実施形態］
次に、本発明の第三実施形態に係る係る接合方法について説明する。本実施形態に係る接合方法では、重ね合せ工程と、内隅接合工程と、本接合工程と、を行う。重ね合せ工程及び内隅接合工程は、第一実施形態と同一であるため、説明を省略する。 [Third embodiment]
Next, the joining method according to the third embodiment of the present invention will be described. In the bonding method according to the present embodiment, an overlapping process, an inner corner bonding process, and a main bonding process are performed. Since the overlapping step and the inner corner joining step are the same as those in the first embodiment, description thereof is omitted.

本接合工程は、図８に示すように、ボビン回転ツールＨを用いて重合部Ｊ１に摩擦攪拌接合を行う工程である。ボビン回転ツールＨは、第一ショルダ部Ｈ１と、第二ショルダ部Ｈ２と、攪拌ピンＨ３とで構成されている。第一ショルダ部Ｈ１は、略円柱状を呈する。第一ショルダ部Ｈ１の攪拌ピンＨ３側には、攪拌ピンＨ３に向けて縮径するテーパー部Ｈ１ａが形成されている。テーパー部Ｈ１ａの端部には、端面Ｈ１ｂが形成されている。   As shown in FIG. 8, the main joining step is a step of performing friction stir welding on the overlapping portion J <b> 1 using the bobbin rotating tool H. The bobbin rotating tool H includes a first shoulder portion H1, a second shoulder portion H2, and a stirring pin H3. The first shoulder portion H1 has a substantially cylindrical shape. A tapered portion H1a having a diameter reduced toward the stirring pin H3 is formed on the stirring pin H3 side of the first shoulder portion H1. An end face H1b is formed at the end of the tapered portion H1a.

第二ショルダ部Ｈ２は、略円柱状を呈する。第二ショルダ部Ｈ２の攪拌ピンＨ３側には、攪拌ピンＨ３に向けて縮径するテーパー部Ｈ２ａが形成されている。テーパー部Ｈ２ａの端部には、端面Ｈ２ｂが形成されている。攪拌ピンＨ３は、第一ショルダ部Ｈ１と第二ショルダ部Ｈ２とを連結する軸状部材である。   The second shoulder portion H2 has a substantially cylindrical shape. A taper portion H2a having a diameter reduced toward the stirring pin H3 is formed on the stirring pin H3 side of the second shoulder portion H2. An end face H2b is formed at the end of the tapered portion H2a. The stirring pin H3 is a shaft-like member that connects the first shoulder portion H1 and the second shoulder portion H2.

本接合工程では、図９の（ａ）に示すように、第一金属部材１及び第二金属部材２を移動不能に架台（図示省略）にクランプした後、第一金属部材１及び第二金属部材２の側方にボビン回転ツールＨを位置させる。攪拌ピンＨ３の長手方向の中心が、重合部Ｊ１の延長上に位置するように高さ位置を調整する。そして、ボビン回転ツールＨを回転させつつ、第一金属部材１及び第二金属部材２に突入させ、重合部Ｊ１に沿って相対移動させる。攪拌ピンＨ３の長さ（第一ショルダ部Ｈ１と第二ショルダ部Ｈ２間距離）は、第一金属部材１及び第二金属部材２の板厚の和よりも小さくなっているため、第二金属部材２の表面２ａに第一ショルダ部Ｈ１（端面Ｈ１ｂ）が押し込まれるとともに、第一金属部材１の裏面１ｂに第二ショルダ部Ｈ２（端面Ｈ２ｂ）が押し込まれる。ボビン回転ツールＨの移動軌跡には、塑性化領域Ｗ３が形成される。以上により、第一金属部材１と第二金属部材２とが接合される。   In the main joining step, as shown in FIG. 9A, after the first metal member 1 and the second metal member 2 are clamped to a mount (not shown) so as not to move, the first metal member 1 and the second metal member are clamped. The bobbin rotating tool H is positioned on the side of the member 2. The height position is adjusted so that the longitudinal center of the stirring pin H3 is positioned on the extension of the overlapping portion J1. Then, while rotating the bobbin rotating tool H, the bobbin rotating tool H is caused to enter the first metal member 1 and the second metal member 2 and is relatively moved along the overlapping portion J1. Since the length of the stirring pin H3 (distance between the first shoulder portion H1 and the second shoulder portion H2) is smaller than the sum of the plate thicknesses of the first metal member 1 and the second metal member 2, the second metal The first shoulder portion H1 (end surface H1b) is pushed into the surface 2a of the member 2, and the second shoulder portion H2 (end surface H2b) is pushed into the back surface 1b of the first metal member 1. A plasticized region W <b> 3 is formed on the movement locus of the bobbin rotating tool H. Thus, the first metal member 1 and the second metal member 2 are joined.

なお、必要に応じて、内隅接合工程、本接合工程で発生したバリを切除するバリ切除工程を行ってもよい。これにより、内隅Ｕ１，Ｕ２、第一金属部材１の裏面１ｂ及び第二金属部材２の表面２ａをきれいに仕上げることができる。   In addition, you may perform the burr cutting process which cuts the burr | flash which generate | occur | produced in the inner corner joining process and this joining process as needed. Thereby, the inner corners U1 and U2, the back surface 1b of the first metal member 1, and the surface 2a of the second metal member 2 can be finished finely.

以上説明した第三実施形態に係る接合方法によれば、一対の内隅Ｕ１，Ｕ２に加えて、重合部Ｊ１に摩擦攪拌接合を行うことにより、接合強度を高めることができる。また、内隅接合工程を行うことにより、本接合工程時における第一金属部材１及び第二金属部材２の位置ずれを防ぐことができる。また、ボビン回転ツールＨを用いて本接合工程を行うことにより、第一金属部材１及び第二金属部材２の板厚方向の全体を１パスで接合することができる。また、第二金属部材２の表面２ａに第一ショルダ部Ｈ１を押し込むとともに、第一金属部材１の裏面１ｂに第二ショルダ部Ｈ２を押し込むことにより、バリの発生を抑制することができる。   According to the joining method which concerns on 3rd embodiment demonstrated above, in addition to a pair of inner corner U1, U2, joining strength can be raised by performing friction stir welding to the superposition | polymerization part J1. Moreover, the position shift of the 1st metal member 1 and the 2nd metal member 2 at the time of this joining process can be prevented by performing an inner corner joining process. Further, by performing the main joining step using the bobbin rotating tool H, the whole of the first metal member 1 and the second metal member 2 in the plate thickness direction can be joined in one pass. Moreover, by pushing the first shoulder H1 into the front surface 2a of the second metal member 2 and pushing the second shoulder H2 into the back 1b of the first metal member 1, the generation of burrs can be suppressed.

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、第一実施形態における第二の本接合工程を、回転ツールＦを用いて行ってもよい。また、第二実施形態における第二の本接合工程を、回転ツールＧを用いて行ってもよい。また、第一実施形態及び第二実施形態では、タブ材Ｔ１，Ｔ２を設けたが、省略してもよい。   Although the embodiments of the present invention have been described above, design changes can be made as appropriate without departing from the spirit of the present invention. For example, the second main joining process in the first embodiment may be performed using the rotary tool F. Further, the second main joining step in the second embodiment may be performed using the rotating tool G. Moreover, in 1st embodiment and 2nd embodiment, although tab material T1, T2 was provided, you may abbreviate | omit.

１ 第一金属部材
１ａ 表面
１ｂ 裏面
２ 第二金属部材
２ａ 表面
２ｂ 裏面
Ｊ１ 重合部
Ｆ 回転ツール（内隅用接合ツール）
Ｆ１ 連結部
Ｆ２ 攪拌ピン
Ｇ 回転ツール
Ｇ１ ショルダ部
Ｇ２ 攪拌ピン
Ｈ ボビン回転ツール
Ｕ１ 内隅
Ｕ２ 内隅 1 1st metal member 1a surface 1b back surface 2 2nd metal member 2a surface 2b back surface J1 superposition part F rotation tool (joining tool for inner corner)
F1 connecting part F2 stirring pin G rotating tool G1 shoulder part G2 stirring pin H bobbin rotating tool U1 inner corner U2 inner corner

Claims (7)

板状の第一金属部材の表面と板状の第二金属部材の裏面とを重ね合わせて重合部を形成する重ね合せ工程と、
前記第一金属部材の端面と前記第二金属部材の裏面とで形成される内隅及び前記第一金属部材の表面と前記第二金属部材の端面とで形成される内隅に内隅用接合ツールの攪拌ピンを挿入して摩擦攪拌接合を行う内隅接合工程と、
攪拌ピンとショルダ部とを備える回転ツールを前記第二金属部材の裏面とは反対側の表面側から挿入し、当該回転ツールの前記攪拌ピンを前記第二金属部材のみ、又は、前記第一金属部材及び前記第二金属部材の両方に接触させた状態で前記重合部に沿って当該回転ツールを相対移動させて前記重合部を摩擦攪拌接合する第一の本接合工程と、を含み、
前記第一の本接合工程では、前記回転ツールの前記ショルダ部を前記第二金属部材の表面に押し込みながら摩擦攪拌接合を行うことを特徴とする接合方法。 An overlapping step of overlapping the surface of the plate-shaped first metal member and the back surface of the plate-shaped second metal member to form a superposed portion;
Inner corner joining to the inner corner formed by the end surface of the first metal member and the rear surface of the second metal member and the inner corner formed by the surface of the first metal member and the end surface of the second metal member. Inner corner joining process of inserting a stirring pin of a tool and performing friction stir welding,
A rotating tool including a stirring pin and a shoulder portion is inserted from the surface side opposite to the back surface of the second metal member, and the stirring pin of the rotating tool is only the second metal member or the first metal member. And a first main joining step of friction stir welding the superposed part by relatively moving the rotary tool along the superposed part in a state of being in contact with both the second metal member,
In the first main joining step, a friction stir welding is performed while pressing the shoulder portion of the rotary tool into the surface of the second metal member. 板状の第一金属部材の表面と板状の第二金属部材の裏面とを重ね合わせて重合部を形成する重ね合せ工程と、
前記第一金属部材の端面と前記第二金属部材の裏面とで形成される内隅及び前記第一金属部材の表面と前記第二金属部材の端面とで形成される内隅に内隅用接合ツールの攪拌ピンを挿入して摩擦攪拌接合を行う内隅接合工程と、
攪拌ピンを備える回転ツールを前記第二金属部材の裏面とは反対側の表面側から挿入し、当該回転ツールの前記攪拌ピンのみを前記第二金属部材のみ、又は、前記第一金属部材及び前記第二金属部材の両方に接触させた状態で前記重合部に沿って当該回転ツールを相対移動させて前記重合部を摩擦攪拌接合する第一の本接合工程と、を含むことを特徴とする接合方法。 An overlapping step of overlapping the surface of the plate-shaped first metal member and the back surface of the plate-shaped second metal member to form a superposed portion;
Inner corner joining to the inner corner formed by the end surface of the first metal member and the rear surface of the second metal member and the inner corner formed by the surface of the first metal member and the end surface of the second metal member. Inner corner joining process of inserting a stirring pin of a tool and performing friction stir welding,
A rotary tool provided with a stirring pin is inserted from the surface side opposite to the back surface of the second metal member, and only the stirring pin of the rotary tool is only the second metal member, or the first metal member and the A first main joining step in which the rotating tool is relatively moved along the overlapped portion in contact with both of the second metal members to friction stir weld the overlapped portion. Method. 攪拌ピンとショルダ部とを備える回転ツールを前記第一金属部材の表面とは反対の裏面側から挿入し、当該回転ツールの攪拌ピンを前記第一金属部材のみ、又は、前記第一金属部材及び前記第二金属部材の両方に接触させた状態で前記重合部に沿って当該回転ツールを相対移動させて前記重合部を摩擦攪拌接合する第二の本接合工程と、を含み、
前記第二の本接合工程では、当該回転ツールのショルダ部を前記第一金属部材の裏面に押し込みながら摩擦攪拌を行うとともに、前記第一の本接合工程の塑性化領域と前記第二の本接合工程の塑性化領域とを重複させることを特徴とする請求項１又は請求項２に記載の接合方法。 A rotary tool including a stirring pin and a shoulder portion is inserted from the back side opposite to the surface of the first metal member, and the stirring pin of the rotary tool is only the first metal member or the first metal member and the A second main joining step in which the rotating tool is relatively moved along the overlapping portion in contact with both of the second metal members, and the overlapping portion is friction stir welded.
In the second main joining step, friction stir is performed while pushing the shoulder portion of the rotating tool into the back surface of the first metal member, and the plasticized region and the second main joining in the first main joining step are performed. The joining method according to claim 1, wherein the plasticizing region of the process is overlapped. 攪拌ピンを備える回転ツールを前記第一金属部材の表面とは反対の裏面側から挿入し、当該回転ツールの攪拌ピンのみを前記第一金属部材のみ、又は、前記第一金属部材及び前記第二金属部材の両方に接触させた状態で前記重合部に沿って当該回転ツールを相対移動させて前記重合部を摩擦攪拌接合する第二の本接合工程と、を含み、
前記第二の本接合工程では、前記第一の本接合工程の塑性化領域と前記第二の本接合工程の塑性化領域とを重複させることを特徴とする請求項１又は請求項２に記載の接合方法。 A rotary tool provided with a stirring pin is inserted from the back side opposite to the surface of the first metal member, and only the first metal member or only the first metal member and the second metal A second main joining step in which the rotating tool is relatively moved along the overlapped portion in contact with both of the metal members to friction stir weld the overlapped portion.
3. The method according to claim 1, wherein in the second main joining step, the plasticizing region in the first main joining step and the plasticizing region in the second main joining step overlap each other. Joining method. 板状の第一金属部材の表面と板状の第二金属部材の裏面とを重ね合わせて重合部を形成する重ね合せ工程と、
前記第一金属部材の端面と前記第二金属部材の裏面とで形成される内隅及び前記第一金属部材の表面と前記第二金属部材の端面とで形成される内隅に内隅用接合ツールの攪拌ピンを挿入して摩擦攪拌接合を行う内隅接合工程と、
一対のショルダ部と前記ショルダ部間を連結する攪拌ピンとを備えるボビン回転ツールを前記重合部に沿って相対移動させて重合部を摩擦攪拌接合する本接合工程と、を含み、
前記本接合工程では、一対の前記ショルダ部を前記第一金属部材及び前記第二金属部材のそれぞれ接触させた状態で摩擦攪拌を行うことを特徴とする接合方法。 An overlapping step of overlapping the surface of the plate-shaped first metal member and the back surface of the plate-shaped second metal member to form a superposed portion;
Inner corner joining to the inner corner formed by the end surface of the first metal member and the rear surface of the second metal member and the inner corner formed by the surface of the first metal member and the end surface of the second metal member. Inner corner joining process of inserting a stirring pin of a tool and performing friction stir welding,
A bobbin rotating tool provided with a pair of shoulder portions and a stirring pin connecting between the shoulder portions, and a main joining step of frictionally stir welding the overlapped portion by relatively moving a bobbin rotating tool along the overlapped portion,
In the main joining step, a friction stir is performed in a state where the pair of shoulder portions are in contact with the first metal member and the second metal member, respectively. 前記内隅接合工程では、前記内隅に対して、１パスで連続して摩擦攪拌を施すことを特徴とする請求項１乃至請求項５のいずれか一項に記載の接合方法。   The joining method according to any one of claims 1 to 5, wherein in the inner corner joining step, friction agitation is continuously applied to the inner corner in one pass. 前記内隅接合工程では、前記内隅に対して、断続的に間をあけて摩擦攪拌を施すことを特徴とする請求項１乃至請求項５のいずれか一項に記載の接合方法。   The joining method according to any one of claims 1 to 5, wherein in the inner corner joining step, friction stir is performed intermittently with respect to the inner corner.
JP2015106542A 2015-05-26 2015-05-26 Joining method Active JP6451503B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015106542A JP6451503B2 (en) 2015-05-26 2015-05-26 Joining method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015106542A JP6451503B2 (en) 2015-05-26 2015-05-26 Joining method

Publications (2)

Publication Number Publication Date
JP2016215267A JP2016215267A (en) 2016-12-22
JP6451503B2 true JP6451503B2 (en) 2019-01-16

Family

ID=57579085

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2015106542A Active JP6451503B2 (en) 2015-05-26 2015-05-26 Joining method

Country Status (1)

Country Link
JP (1) JP6451503B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7478378B2 (en) 2020-09-11 2024-05-07 冨士端子工業株式会社 Method for joining dissimilar metals

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10230376A (en) * 1997-02-21 1998-09-02 Showa Alum Corp Metallic plate shape joined body
JPH1158039A (en) * 1997-08-18 1999-03-02 Showa Alum Corp Lap joint by friction-stirring-joining and formation thereof
US7163136B2 (en) * 2003-08-29 2007-01-16 The Boeing Company Apparatus and method for friction stir welding utilizing a grooved pin
US7234626B2 (en) * 2004-10-22 2007-06-26 Edison Welding Institute, Inc. Method of friction stir welding and retractable shoulderless variable penetration friction stir welding tool for same

Also Published As

Publication number Publication date
JP2016215267A (en) 2016-12-22

Similar Documents

Publication Publication Date Title
JP6052237B2 (en) Friction stir welding method
JP2016078087A (en) Joining method
JP6052232B2 (en) Joining method
JP6414327B2 (en) Joining method
JP5915802B2 (en) Friction stir welding method
JP2018039017A (en) Joining method
JP6451503B2 (en) Joining method
JP6756215B2 (en) Joining method
JP6756105B2 (en) Joining method
JP2018065164A (en) Method of manufacturing hollow vessel
JP6777020B2 (en) Joining method
JP2018094569A (en) Joint method
JP6699530B2 (en) Joining method
JP6740964B2 (en) Joining method
JP6164337B2 (en) Friction stir welding method
JP6662210B2 (en) Joining method
JP5962807B2 (en) Friction stir welding method
JP6112175B2 (en) Friction stir welding method
JP6153964B2 (en) Friction stir welding method
JP2015223607A (en) Friction stir welding method
JP2018086674A (en) Junction method
JP2018020345A (en) Frictional agitation joint method
JP2019025489A (en) Joining method
JP6740963B2 (en) Joining method
JP2018051563A (en) Joint method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20180130

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20181107

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20181113

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20181126

R150 Certificate of patent or registration of utility model

Ref document number: 6451503

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350