JP6766476B2 - Joining method - Google Patents

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 joining metal members by friction stir welding.

特許文献１，２には、金属部材同士を正面視Ｔ字状に突き合わせ、突合せ部を摩擦攪拌接合する技術が開示されている。当該従来技術は、第一金属部材の端面を、第二金属部材の裏面に形成された溝部に挿入した後、第二金属部材の表面側から回転ツールを挿入して突合せ部を摩擦攪拌接合するというものである。 Patent Documents 1 and 2 disclose a technique in which metal members are butted into a T-shape in a front view and the butt portions are friction-stir welded. In the prior art, after inserting the end face of the first metal member into the groove formed on the back surface of the second metal member, a rotating tool is inserted from the front surface side of the second metal member to friction stir weld the butt portions. That is.

特許第３９４７２７１号公報Japanese Patent No. 3947271 特許第４０５６５８７号公報Japanese Patent No. 40565587

従来技術であると、第一金属部材の端面を第二金属部材の溝部に挿入する形態であるため、第一金属部材の長手方向に両部材が相対移動する。これにより、金属部材同士の位置決めが困難になるという問題がある。また、従来技術であると回転ツールのショルダ部を第二金属部材の表面に接触させて摩擦攪拌を行うため、摩擦攪拌装置にかかる負荷が大きくなるという問題がある。 In the prior art, since the end face of the first metal member is inserted into the groove of the second metal member, both members move relative to each other in the longitudinal direction of the first metal member. This causes a problem that positioning of the metal members becomes difficult. Further, in the prior art, since the shoulder portion of the rotary tool is brought into contact with the surface of the second metal member to perform friction stir welding, there is a problem that the load applied to the friction stir welding device becomes large.

このような観点から、本発明は、金属部材同士の位置決めが容易であるとともに、摩擦攪拌装置にかかる負荷を小さくすることができる接合方法を提供することを課題とする。 From such a viewpoint, it is an object of the present invention to provide a joining method capable of easily positioning metal members with each other and reducing the load applied to the friction stir welding device.

このような課題を解決するために本発明は、攪拌ピンを備えた回転ツールを用いて第一金属部材及び第二金属部材を接合する接合方法であって、前記第一金属部材の端面から突出する突出部を形成するとともに、前記第二金属部材の裏面に孔部を形成する準備工程と、前記第一金属部材の端面と前記第二金属部材の裏面とを重ね合わせて重合部を形成するとともに、前記孔部に前記突出部を挿入して前記孔部と前記突出部とが突き合わされた突合せ部を形成する突合せ工程と、前記第二金属部材の表面側から回転する前記回転ツールの攪拌ピンを挿入し、前記攪拌ピンのみを前記第二金属部材、又は、前記第一金属部材及び前記第二金属部材に接触させた状態で前記突合せ部を摩擦攪拌接合して第一塑性化領域を形成する第一摩擦攪拌工程と、前記重合部を摩擦攪拌接合する第二摩擦攪拌工程と、を含み、前記第二摩擦攪拌工程では、前記第一塑性化領域を通るように前記回転ツールの移動ルートを設定することを特徴とする。 In order to solve such a problem, the present invention is a joining method for joining a first metal member and a second metal member using a rotary tool provided with a stirring pin, and projects from the end face of the first metal member. The preparatory step of forming a hole on the back surface of the second metal member and the end face of the first metal member and the back surface of the second metal member are overlapped to form a superposed portion. At the same time, a butt step of inserting the protruding portion into the hole portion to form a butt portion in which the hole portion and the protruding portion are abutted, and stirring of the rotating tool rotating from the surface side of the second metal member. A pin is inserted, and the butt portion is friction-stir welded in a state where only the stirring pin is in contact with the second metal member or the first metal member and the second metal member to form a first plasticized region. The first friction stir welding step of forming and the second friction stir welding step of friction stir welding of the polymerized portions are included. In the second friction stir welding step, the rotating tool is moved so as to pass through the first plasticized region. It is characterized by setting a route .

また、本発明は、攪拌ピンを備えた回転ツールを用いて第一金属部材及び第二金属部材を接合する接合方法であって、前記第一金属部材の表面から突出する突出部を形成するとともに、前記第二金属部材の裏面に孔部を形成する準備工程と、前記第一金属部材の表面と前記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とともに、前記孔部に前記突出部を挿入して前記孔部と前記突出部とが突き合わされた突合せ部を形成する重合工程と、前記第二金属部材の表面側から回転する前記回転ツールの攪拌ピンを挿入し、前記攪拌ピンのみを前記第二金属部材、又は、前記第一金属部材及び前記第二金属部材に接触させた状態で前記突合せ部を摩擦攪拌接合して第一塑性化領域を形成する第一摩擦攪拌工程と、前記重合部を摩擦攪拌接合する第二摩擦攪拌工程と、を含み、前記第二摩擦攪拌工程では、前記第一塑性化領域を通るように前記回転ツールの移動ルートを設定することを特徴とする。 Further, the present invention is a joining method for joining a first metal member and a second metal member by using a rotary tool provided with a stirring pin, and forms a protruding portion protruding from the surface of the first metal member. The preparatory step of forming a hole on the back surface of the second metal member and the surface of the first metal member and the back surface of the second metal member are overlapped to form a superposed portion, and the hole is formed by the above. A polymerization step of inserting a protruding portion to form a butt portion in which the hole portion and the protruding portion are abutted, and a stirring pin of the rotating tool that rotates from the surface side of the second metal member are inserted to stir. A first friction stir welding step of forming a first plasticized region by friction stir welding of the butt portions in a state where only the pin is in contact with the second metal member, or the first metal member and the second metal member. The second friction stir welding step includes a second friction stir welding step of joining the polymerized portions by friction stir welding, and the second friction stir welding step is characterized in that the movement route of the rotating tool is set so as to pass through the first plasticization region. And.

かかる接合方法によれば、孔部に突出部を嵌め合わせると、第一金属部材に対して第二金属部材が移動不能となる。つまり、孔部及び突出部によって両金属部材を容易に位置決めすることができる。また、回転ツールの攪拌ピンのみを、第二金属部材、又は、第一金属部材及び第二金属部材に接触させた状態で突合せ部を摩擦攪拌接合するため、摩擦攪拌装置に作用する負荷を小さくすることができる。また、かかる接合方法によれば、第一金属部材と第二金属部材との接合強度を高めることができる。 According to such a joining method, when the protruding portion is fitted into the hole portion, the second metal member becomes immovable with respect to the first metal member. That is, both metal members can be easily positioned by the holes and the protrusions. Further, since the butt portion is friction stir welded in a state where only the stirring pin of the rotary tool is in contact with the second metal member or the first metal member and the second metal member, the load acting on the friction stir device is reduced. can do. Further, according to such a joining method, the joining strength between the first metal member and the second metal member can be increased.

また、前記重合工程の前に、前記第一金属部材の表面及び前記第二金属部材の裏面の少なくとも一方に溝又は凹部を形成することが好ましい。かかる接合方法によれば、第一金属部材と第二金属部材の内部に中空部を形成することができる。 Further, it is preferable to form a groove or a recess on at least one of the front surface of the first metal member and the back surface of the second metal member before the polymerization step. According to such a joining method, a hollow portion can be formed inside the first metal member and the second metal member.

本発明に係る接合方法によれば、金属部材同士の位置決めが容易になるとともに、摩擦攪拌装置にかかる負荷を小さくすることができる。 According to the joining method according to the present invention, positioning between metal members can be facilitated, and the load applied to the friction stir welding device can be reduced.

本発明の第一実施形態に係る接合方法の準備工程を示す斜視図である。It is a perspective view which shows the preparation process of the joining method which concerns on 1st Embodiment of this invention. 第一実施形態に係る接合方法の突合せ工程を示す断面図である。It is sectional drawing which shows the butt process of the joining method which concerns on 1st Embodiment. 第一実施形態に係る接合方法の第一摩擦攪拌工程を示す斜視図である。It is a perspective view which shows the 1st friction stir step of the joining method which concerns on 1st Embodiment. 第一実施形態に係る接合方法の第一摩擦攪拌工程を示す断面図である。It is sectional drawing which shows the 1st friction stir step of the joining method which concerns on 1st Embodiment. 第一実施形態に係る接合方法の第二摩擦攪拌工程を示す断面図である。It is sectional drawing which shows the 2nd friction stir step 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重合工程を示す斜視図である。It is a perspective view which shows the polymerization process of the joining method which concerns on 2nd Embodiment of this invention. 第二実施形態に係る接合方法の重合工程を示す断面図である。It is sectional drawing which shows the polymerization process of the joining method which concerns on 2nd Embodiment. 第二実施形態に係る接合方法の第一摩擦攪拌工程を示す断面図である。It is sectional drawing which shows the 1st friction stir step of the joining method which concerns on 2nd Embodiment. 本発明の第三実施形態に係る接合方法の準備工程を示す斜視図である。It is a perspective view which shows the preparation process of the joining method which concerns on 3rd Embodiment of this invention. 第三実施形態に係る接合方法の重合工程を示す断面図である。It is sectional drawing which shows the polymerization process of the joining method which concerns on 3rd Embodiment. 第三実施形態に係る接合方法の第一摩擦攪拌工程を示す断面図である。It is sectional drawing which shows the 1st friction stir step of the joining method which concerns on 3rd Embodiment. 第三実施形態に係る接合方法の第二摩擦攪拌工程を示す斜視図である。It is a perspective view which shows the 2nd friction stir step of the joining method which concerns on 3rd Embodiment. 第三実施形態に係る接合方法の第二摩擦攪拌工程を示す断面図である。It is sectional drawing which shows the 2nd friction stir step 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面を参照して詳細に説明する。図１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とを正面視Ｔ字状に突合せて摩擦攪拌により接合する。本実施形態に係る接合方法では、準備工程と、突合せ工程と、第一摩擦攪拌工程と、第二摩擦攪拌工程と、を行う。なお、説明における「表面」とは、「裏面」の反対側の面を意味する。 [First Embodiment]
The joining method according to the first embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, in the joining method according to the present embodiment, the first metal member 1 and the second metal member 2 are butted in a T-shape in a front view and joined by friction stir welding. In the joining method according to the present embodiment, a preparation step, a butt step, a first friction stir step, and a second friction stir step are performed. The "front surface" in the description means the surface on the opposite side of the "back surface".

準備工程は、第一金属部材１及び第二金属部材２を準備する工程である。第一金属部材１及び第二金属部材２は、いずれも板状を呈する。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。 The preparation step is a step of preparing the first metal member 1 and the second metal member 2. Both the first metal member 1 and the second metal member 2 have a plate shape. The first metal member 1 and the second metal member 2 are appropriately selected from frictionally agitable metals such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium and magnesium alloy.

第一金属部材１の端面１ａには、複数の突出部１０（本実施形態では３つ）が形成されている。突出部１０の個数は制限されるものではない。突出部１０は単数でも良い。突出部１０の形状は特に制限されないが本実施形態では円柱状を呈する。突出部１０の高さ寸法は、第二金属部材２の板厚寸法の半分程度になっている。 A plurality of protrusions 10 (three in the present embodiment) are formed on the end surface 1a of the first metal member 1. The number of protrusions 10 is not limited. The protrusion 10 may be singular. The shape of the protruding portion 10 is not particularly limited, but in the present embodiment, it exhibits a columnar shape. The height dimension of the protruding portion 10 is about half of the plate thickness dimension of the second metal member 2.

第二金属部材２の裏面２ｃには、孔部１１が形成されている。孔部１１は、円柱状の中空部になっており、突出部１０に対応する位置に形成されている。孔部１１は、突出部１０が概ね隙間なく嵌め合わされる大きさになっている。 A hole 11 is formed on the back surface 2c of the second metal member 2. The hole portion 11 is a cylindrical hollow portion, and is formed at a position corresponding to the protruding portion 10. The hole portion 11 has a size in which the protruding portion 10 is fitted with substantially no gap.

突合せ工程は、図２に示すように、第一金属部材１の端面１ａと第二金属部材２の裏面２ｃとを重ね合わせるとともに、孔部１１に突出部１０を挿入する工程である。突出部１０の外周面と孔部１１の孔壁とが突き合わされることにより突合せ部Ｊ１が形成される。また、第一金属部材１の端面１ａと第二金属部材２の裏面２ｃとが重ね合わされて重合部Ｊ２が形成される。 As shown in FIG. 2, the butt step is a step of superimposing the end surface 1a of the first metal member 1 and the back surface 2c of the second metal member 2 and inserting the protruding portion 10 into the hole portion 11. The abutting portion J1 is formed by abutting the outer peripheral surface of the protruding portion 10 and the hole wall of the hole portion 11. Further, the end surface 1a of the first metal member 1 and the back surface 2c of the second metal member 2 are overlapped to form the overlapping portion J2.

第一摩擦攪拌工程は、図３及び図４に示すように、第二金属部材２の表面２ｂ側から回転する接合用回転ツールＦを挿入し、突合せ部Ｊ１を摩擦攪拌接合する工程である。接合用回転ツールＦは、連結部Ｆ１と、攪拌ピンＦ２とで構成されている。接合用回転ツールＦは、特許請求の範囲の「回転ツール」に相当する。連結部Ｆ１は、図示しない摩擦攪拌装置に取り付けられる部位であって、円柱状を呈する。 As shown in FIGS. 3 and 4, the first friction stir welding step is a step of inserting a joining rotation tool F that rotates from the surface 2b side of the second metal member 2 and friction stir welding the butt portion J1. The joining rotary tool F is composed of a connecting portion F1 and a stirring pin F2. The rotary tool F for joining corresponds to the "rotation tool" in the claims. The connecting portion F1 is a portion attached to a friction stir device (not shown) and exhibits a columnar shape.

攪拌ピンＦ２は、連結部Ｆ１から垂下しており、連結部Ｆ１と同軸になっている。攪拌ピンＦ２は連結部Ｆ１から離間するにつれて先細りになっている。攪拌ピンＦ２の外周面には螺旋溝が刻設されている。本実施形態では、接合用回転ツールＦを右回転させるため、螺旋溝は、基端から先端に向かうにつれて左回りに形成されている。 The stirring pin F2 hangs down from the connecting portion F1 and is coaxial with the connecting portion F1. The stirring pin F2 is tapered as it is separated from the connecting portion F1. A spiral groove is engraved on the outer peripheral surface of the stirring pin F2. In the present embodiment, in order to rotate the joining rotation tool F clockwise, the spiral groove is formed counterclockwise from the base end to the tip end.

なお、接合用回転ツールＦを左回転させる場合は、螺旋溝を基端から先端に向かうにつれて右回りに形成することが好ましい。螺旋溝をこのように設定することで、摩擦攪拌の際に塑性流動化した金属が螺旋溝によって攪拌ピンＦ２の先端側に導かれる。これにより、被接合金属部材（第一金属部材１、第二金属部材２）の外部に溢れ出る金属の量を少なくすることができる。 When the joint rotation tool F is rotated counterclockwise, it is preferable to form the spiral groove clockwise from the base end to the tip end. By setting the spiral groove in this way, the metal plastically fluidized during friction stir welding is guided to the tip end side of the stirring pin F2 by the spiral groove. As a result, the amount of metal that overflows to the outside of the metal member to be joined (first metal member 1, second metal member 2) can be reduced.

第一摩擦攪拌工程では、図３及び図４に示すように、第二金属部材２の表面２ｂから突合せ部Ｊ１に右回転させた攪拌ピンＦ２を挿入する。第一摩擦攪拌工程では、攪拌ピンＦ２のみと第一金属部材１及び第二金属部材２とを接触させた状態で突合せ部Ｊ１に沿って（突出部１０の外周側面に沿って）接合用回転ツールＦを相対移動させる。つまり、攪拌ピンＦ２の基端側を露出させた状態で突合せ部Ｊ１を摩擦攪拌接合する。接合用回転ツールＦの移動軌跡には、塑性化領域Ｗ１が形成される。第一摩擦攪拌工程では、塑性化領域Ｗ１の始端と終端とがオーバーラップするように設定することが好ましい。第一摩擦攪拌工程では、突出部１０及び孔部１１で形成された他の突合せ部Ｊ１に対しても同様に摩擦攪拌接合を行う。 In the first friction stir step, as shown in FIGS. 3 and 4, a stirring pin F2 rotated clockwise is inserted from the surface 2b of the second metal member 2 into the butt portion J1. In the first friction stir welding step, the joining rotation is performed along the butt portion J1 (along the outer peripheral side surface of the protruding portion 10) with only the stirring pin F2 in contact with the first metal member 1 and the second metal member 2. Move the tool F relative to each other. That is, the butt portion J1 is friction-stir welded with the base end side of the stirring pin F2 exposed. A plasticized region W1 is formed in the movement locus of the joining rotation tool F. In the first friction stir welding step, it is preferable to set so that the start end and the end end of the plasticized region W1 overlap. In the first friction stir welding step, friction stir welding is similarly performed on the other butt portions J1 formed by the protruding portion 10 and the hole portion 11.

なお、第一摩擦攪拌工程では、攪拌ピンＦ２のみと第二金属部材２のみとを接触させた状態で、突合せ部Ｊ１を摩擦攪拌接合してもよい。この場合は、攪拌ピンＦ２と第二金属部材２との摩擦熱により突合せ部Ｊ１が塑性流動化して接合される。 In the first friction stir welding step, the butt portion J1 may be friction stir welded in a state where only the stirring pin F2 and only the second metal member 2 are in contact with each other. In this case, the butt portion J1 is plastically fluidized and joined by the frictional heat between the stirring pin F2 and the second metal member 2.

第二摩擦攪拌稿工程は、図５に示すように、第二金属部材２の表面２ｂ側から回転する接合用回転ツールＦを挿入し、重合部Ｊ２を摩擦攪拌接合する工程である。第二摩擦攪拌工程では、攪拌ピンＦ２が第一金属部材１の端面１ａに達するように設定し、重合部Ｊ２の長手方向に相対移動させる。接合用回転ツールＦの移動軌跡には、塑性化領域Ｗ２が形成される。 As shown in FIG. 5, the second friction stir welding step is a step of inserting a joining rotation tool F that rotates from the surface 2b side of the second metal member 2 and friction stir welding the overlapping portion J2. In the second friction stir step, the stir pin F2 is set to reach the end face 1a of the first metal member 1 and is relatively moved in the longitudinal direction of the polymerization portion J2. A plasticized region W2 is formed in the movement locus of the joining rotation tool F.

第二摩擦攪拌工程が終了したら、第二金属部材２の表面２ｂに発生したバリを除去するバリ除去工程を行うことが好ましい。これにより、第二金属部材２の表面２ｂをきれいに仕上げることができる。 After the second friction stir welding step is completed, it is preferable to perform a burr removing step for removing burrs generated on the surface 2b of the second metal member 2. Thereby, the surface 2b of the second metal member 2 can be finished cleanly.

以上説明した本実施形態に係る接合方法によれば、突出部１０を孔部１１に嵌め合わせると、第一金属部材１に対して第二金属部材２が移動不能となる。つまり、突出部１０及び孔部１１によって両金属部材を位置決めすることができる。また、第一摩擦攪拌工程では、接合用回転ツールＦの攪拌ピンＦ２のみを第一金属部材１及び第二金属部材２に接触させた状態、又は、第二金属部材２のみに接触させた状態で突合せ部Ｊ１を摩擦攪拌接合するため、摩擦攪拌装置に作用する負荷を小さくすることができる。 According to the joining method according to the present embodiment described above, when the protruding portion 10 is fitted into the hole portion 11, the second metal member 2 becomes immovable with respect to the first metal member 1. That is, both metal members can be positioned by the protrusion 10 and the hole 11. Further, in the first friction stir welding step, only the stirring pin F2 of the welding rotary tool F is in contact with the first metal member 1 and the second metal member 2, or is in contact with only the second metal member 2. Since the butt portion J1 is welded by friction stir welding, the load acting on the friction stir welding device can be reduced.

また、本実施形態のように、突出部１０及び孔部１１を複数個設けるとともに各突合せ部Ｊ１に対して摩擦攪拌接合を行うことにより、被接合金属部材の接合強度を高めることができる。 Further, as in the present embodiment, the joining strength of the metal member to be joined can be increased by providing a plurality of protruding portions 10 and holes 11 and performing friction stir welding with each butt portion J1.

また、第二摩擦攪拌工程では、重合部Ｊ２も摩擦攪拌接合するため、第一金属部材１と第二金属部材２の接合強度を高めることができる。また、第二摩擦攪拌工程でも、接合用回転ツールＦの攪拌ピンＦ２のみを第一金属部材１及び第二金属部材２に接触させた状態で重合部Ｊ２を摩擦攪拌接合するため、摩擦攪拌装置に作用する負荷を小さくすることができる。 Further, in the second friction stir welding step, since the overlapping portion J2 is also friction stir welded, the bonding strength between the first metal member 1 and the second metal member 2 can be increased. Further, also in the second friction stir welding step, since only the stirring pin F2 of the joining rotary tool F is brought into contact with the first metal member 1 and the second metal member 2 and the polymerized portion J2 is subjected to friction stir welding, the friction stir welding device is used. The load acting on the can be reduced.

［第二実施形態］
次に、第二実施形態に係る接合方法について説明する。図６及び図７に示すように、第二実施形態に係る接合方法では、第一金属部材１Ａと第二金属部材２とを接合する。第二実施形態に係る接合方法では、準備工程と、重合工程と、第一摩擦攪拌工程と、第二摩擦攪拌工程と、を行う。 [Second Embodiment]
Next, the joining method according to the second embodiment will be described. As shown in FIGS. 6 and 7, in the joining method according to the second embodiment, the first metal member 1A and the second metal member 2 are joined. In the joining method according to the second embodiment, a preparation step, a polymerization step, a first friction stir step, and a second friction stir step are performed.

準備工程は、第一金属部材１Ａと第二金属部材２とを用意する工程である。第二金属部材２は、第一実施形態と同一である。第一金属部材１Ａは、摩擦攪拌可能な金属で形成されており、板状を呈する。第一金属部材１Ａの表面１ｂの中央には、突出部１０が形成されている。突出部１０の個数は制限されないが、本実施形態では３つ形成されている。 The preparatory step is a step of preparing the first metal member 1A and the second metal member 2. The second metal member 2 is the same as that of the first embodiment. The first metal member 1A is made of a metal that can be frictionally agitated and has a plate shape. A protrusion 10 is formed in the center of the surface 1b of the first metal member 1A. The number of protrusions 10 is not limited, but three are formed in this embodiment.

重合工程は、第一金属部材１Ａの表面１ｂと第二金属部材２の裏面２ｃとを重ね合わせて重合部Ｊ３を形成するとともに、孔部１１に突出部１０を挿入して孔部１１と突出部１０とが突き合わされた突合せ部Ｊ１を形成する工程である。 In the polymerization step, the front surface 1b of the first metal member 1A and the back surface 2c of the second metal member 2 are overlapped to form the polymerization portion J3, and the protrusion 10 is inserted into the hole 11 to protrude from the hole 11. This is a step of forming a butt portion J1 in which the portions 10 are abutted against each other.

第一摩擦攪拌工程は、図８に示すように、第二金属部材２の表面２ｂ側から回転する接合用回転ツールＦの攪拌ピンＦ２を挿入し、攪拌ピンＦ２のみを第二金属部材２、又は、第一金属部材１Ａ及び第二金属部材２に接触させた状態で突合せ部Ｊ１を摩擦攪拌接合する工程である。第一摩擦攪拌工程は、第一実施形態の第一摩擦攪拌工程と同等であるため詳細な説明は省略する。 In the first friction stirring step, as shown in FIG. 8, the stirring pin F2 of the joining rotation tool F that rotates from the surface 2b side of the second metal member 2 is inserted, and only the stirring pin F2 is inserted into the second metal member 2. Alternatively, it is a step of friction stir welding of the butt portion J1 in a state of being in contact with the first metal member 1A and the second metal member 2. Since the first friction stir step is equivalent to the first friction stir step of the first embodiment, detailed description thereof will be omitted.

第二摩擦攪拌工程は、重合部Ｊ３を摩擦攪拌接合する工程である。具体的な図示は省略するが、接合用回転ツールＦの攪拌ピンのみを、第一金属部材１Ａ及び第二金属部材２に接触させた状態で、重合部Ｊ３に沿って接合用回転ツールＦを相対移動させる。接合用回転ツールＦの移動ルートは特に制限されないが、例えば、各塑性化領域Ｗ１を通過するように直線状に設定してもよいし、第二金属部材２の周縁に沿って閉ループ状に設定してもよい。 The second friction stir welding step is a step of friction stir welding the polymerization section J3. Although specific illustration is omitted, the joining rotation tool F is provided along the polymerization portion J3 in a state where only the stirring pin of the joining rotation tool F is in contact with the first metal member 1A and the second metal member 2. Move relative to each other. The movement route of the joining rotation tool F is not particularly limited, but may be set linearly so as to pass through each plasticized region W1 or set in a closed loop shape along the peripheral edge of the second metal member 2. You may.

以上説明した本実施形態に係る接合方法によっても第一実施形態と略同等の効果を奏することができる。 The joining method according to the present embodiment described above can also achieve substantially the same effect as that of the first embodiment.

［第三実施形態］
次に、第三実施形態に係る接合方法について説明する。図９に示すように、第三実施形態に係る接合方法では、準備工程と、重合工程と、第一摩擦攪拌工程と、第二摩擦攪拌工程と、を行う。 [Third Embodiment]
Next, the joining method according to the third embodiment will be described. As shown in FIG. 9, in the joining method according to the third embodiment, a preparation step, a polymerization step, a first friction stir step, and a second friction stir step are performed.

準備工程は、第一金属部材１Ｂと、第二金属部材２Ｂとを用意する工程である。第一金属部材１Ｂは、摩擦攪拌可能な金属で形成されており板状を呈する。第一金属部材１Ｂの表面１Ｂｂには、凹溝１２が形成されている。凹溝１２は、平面視Ｕ字状、断面矩形を呈する。表面１Ｂｂの四隅には、４つの突出部１０が形成されている。 The preparation step is a step of preparing the first metal member 1B and the second metal member 2B. The first metal member 1B is made of a metal that can be frictionally agitated and has a plate shape. A concave groove 12 is formed on the surface 1Bb of the first metal member 1B. The concave groove 12 has a U-shape in a plan view and a rectangular cross section. Four protrusions 10 are formed at the four corners of the surface 1Bb.

第二金属部材２Ｂは、摩擦攪拌可能な金属で形成されており板状を呈する。第二金属部材２Ｂの裏面２Ｂｃの四隅には、孔部１１が形成されている。孔部１１は、突出部１０と対応する位置に形成されている。突出部１０及び孔部１１は、隙間なく嵌め合わされる形状になっている。 The second metal member 2B is made of a metal that can be frictionally agitated and has a plate shape. Holes 11 are formed at the four corners of the back surface 2Bc of the second metal member 2B. The hole portion 11 is formed at a position corresponding to the protruding portion 10. The protruding portion 10 and the hole portion 11 have a shape to be fitted without a gap.

重合工程は、図１０に示すように、第一金属部材１Ｂの表面１Ｂｂと第二金属部材２Ｂの裏面２Ｂｃとを重ね合わせて重合部Ｊ４を形成するとともに、孔部１１に突出部１０を挿入して孔部１１と突出部１０とが突き合わされた突合せ部Ｊ１を形成する工程である。 In the polymerization step, as shown in FIG. 10, the front surface 1Bb of the first metal member 1B and the back surface 2Bc of the second metal member 2B are overlapped to form the polymerization portion J4, and the protrusion 10 is inserted into the hole portion 11. This is a step of forming the butt portion J1 in which the hole portion 11 and the protruding portion 10 are abutted with each other.

第一摩擦攪拌工程は、図１１に示すように、第二金属部材２Ｂの表面２Ｂｂ側から回転する接合用回転ツールＦの攪拌ピンＦ２を挿入し、攪拌ピンＦ２のみを第二金属部材２Ｂ、又は、第一金属部材１Ｂ及び第二金属部材２Ｂに接触させた状態で突合せ部Ｊ１を摩擦攪拌接合する工程である。第一摩擦攪拌工程は、第一実施形態の第一摩擦攪拌工程と同等であるため詳細な説明は省略する。 In the first friction stirring step, as shown in FIG. 11, the stirring pin F2 of the joining rotation tool F that rotates from the surface 2Bb side of the second metal member 2B is inserted, and only the stirring pin F2 is inserted into the second metal member 2B. Alternatively, it is a step of friction stir welding of the butt portion J1 in a state of being in contact with the first metal member 1B and the second metal member 2B. Since the first friction stir step is equivalent to the first friction stir step of the first embodiment, detailed description thereof will be omitted.

第二摩擦攪拌工程は、図１２及び図１３に示すように、重合部Ｊ４を摩擦攪拌接合する工程である。図１２に示すように、接合用回転ツールＦの攪拌ピンＦ２を第二金属部材２Ｂの表面２Ｂｂに設定したＳｐに挿入し、第二金属部材２Ｂの外周縁に沿って接合用回転ツールＦを相対移動させる。つまり、第二金属部材２Ｂの四隅にある塑性化領域Ｗ１を通るように、接合用回転ツールＦの移動ルートを設定し、相対移動させる。第二摩擦攪拌工程では、攪拌ピンＦ２のみを第一金属部材１Ｂ及び第二金属部材２Ｂに接触させた状態で重合部Ｊ４に対して摩擦攪拌接合を行う。第二摩擦攪拌工程では、塑性化領域Ｗ２の始端と終端とをオーバーラップさせ、塑性化領域Ｗ２が閉ループとなるようにする。 The second friction stir welding step is a step of friction stir welding the polymerized portion J4 as shown in FIGS. 12 and 13. As shown in FIG. 12, the stirring pin F2 of the joining rotation tool F is inserted into the Sp set on the surface 2Bb of the second metal member 2B, and the joining rotation tool F is inserted along the outer peripheral edge of the second metal member 2B. Move relative to each other. That is, the movement route of the joining rotation tool F is set so as to pass through the plasticized regions W1 at the four corners of the second metal member 2B, and the relative movement is performed. In the second friction stir welding step, friction stir welding is performed on the polymerization section J4 in a state where only the stirring pin F2 is in contact with the first metal member 1B and the second metal member 2B. In the second friction stir welding step, the start end and the end end of the plasticized region W2 are overlapped so that the plasticized region W2 becomes a closed loop.

以上説明した第三実施形態に係る接合方法によっても第一実施形態と略同等の効果を奏することができる。また、第三実施形態に係る接合方法によれば内部に中空部を備えた構造物を形成することができる。また、塑性化領域Ｗ２をオーバーラップさせることにより、構造物の水密性及び気密性を高めることができる。 The joining method according to the third embodiment described above can also achieve substantially the same effect as that of the first embodiment. Further, according to the joining method according to the third embodiment, a structure having a hollow portion inside can be formed. Further, by overlapping the plasticized regions W2, the watertightness and airtightness of the structure can be improved.

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、第一摩擦攪拌工程では、攪拌ピンＦ２が第一金属部材１の端面１ａ、第一金属部材１Ａの表面１ｂ又は第一金属部材１Ｂの表面１Ｂｂに達するように挿入深さを設定してもよい。また、例えば、第三実施形態では、凹溝１２を第一金属部材１Ｂに形成したが、第一金属部材１Ｂ及び第二金属部材２Ｂの少なくとも一方に凹溝を形成すればよい。また、第一金属部材１Ｂ及び第二金属部材２Ｂの少なくとも一方に凹部を形成してもよい。また、第一摩擦攪拌工程及び第二摩擦攪拌工程は、どちらを先に行ってもよい。 Although the embodiments of the present invention have been described above, the design can be appropriately changed within a range not contrary to the gist of the present invention. For example, in the first friction stir step, the insertion depth is set so that the stirring pin F2 reaches the end surface 1a of the first metal member 1, the surface 1b of the first metal member 1A, or the surface 1Bb of the first metal member 1B. May be good. Further, for example, in the third embodiment, the concave groove 12 is formed in the first metal member 1B, but the concave groove may be formed in at least one of the first metal member 1B and the second metal member 2B. Further, a recess may be formed in at least one of the first metal member 1B and the second metal member 2B. In addition, either of the first friction stir step and the second friction stir step may be performed first.

１ 第一金属部材
２ 第二金属部材
１０ 突出部
１１ 孔部
１２ 凹溝
Ｆ 接合用回転ツール
Ｆ１ 連結部
Ｆ２ 攪拌ピン
Ｊ１ 突合せ部
Ｊ２ 重合部
Ｗ１ 塑性化領域 1 1st metal member 2 2nd metal member 10 Protruding part 11 Hole part 12 Concave groove F Rotating tool for joining F1 Connecting part F2 Stirring pin J1 Butting part J2 Overlapping part W1 Plasticization area

Claims (3)

攪拌ピンを備えた回転ツールを用いて第一金属部材及び第二金属部材を接合する接合方法であって、
前記第一金属部材の端面から突出する突出部を形成するとともに、前記第二金属部材の裏面に孔部を形成する準備工程と、
前記第一金属部材の端面と前記第二金属部材の裏面とを重ね合わせて重合部を形成するとともに、前記孔部に前記突出部を挿入して前記孔部と前記突出部とが突き合わされた突合せ部を形成する突合せ工程と、
前記第二金属部材の表面側から回転する前記回転ツールの攪拌ピンを挿入し、前記攪拌ピンのみを前記第二金属部材、又は、前記第一金属部材及び前記第二金属部材に接触させた状態で前記突合せ部を摩擦攪拌接合して第一塑性化領域を形成する第一摩擦攪拌工程と、
前記重合部を摩擦攪拌接合する第二摩擦攪拌工程と、を含み、
前記第二摩擦攪拌工程では、前記第一塑性化領域を通るように前記回転ツールの移動ルートを設定することを特徴とする接合方法。 A joining method for joining a first metal member and a second metal member using a rotating tool equipped with a stirring pin.
A preparatory step of forming a protruding portion protruding from the end surface of the first metal member and forming a hole on the back surface of the second metal member.
The end face of the first metal member and the back surface of the second metal member were overlapped to form a polymerized portion, and the protrusion was inserted into the hole so that the hole and the protrusion were abutted against each other. The butt process to form the butt part and
A state in which a stirring pin of the rotating tool that rotates from the surface side of the second metal member is inserted, and only the stirring pin is brought into contact with the second metal member, or the first metal member and the second metal member. In the first friction stir welding step of forming the first plasticized region by friction stir welding the butt joints in
Including a second friction stir step of friction stir welding of the polymerized portions.
In the second friction stir welding step, a joining method characterized in that a moving route of the rotating tool is set so as to pass through the first plasticized region . 攪拌ピンを備えた回転ツールを用いて第一金属部材及び第二金属部材を接合する接合方法であって、
前記第一金属部材の表面から突出する突出部を形成するとともに、前記第二金属部材の裏面に孔部を形成する準備工程と、
前記第一金属部材の表面と前記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とともに、前記孔部に前記突出部を挿入して前記孔部と前記突出部とが突き合わされた突合せ部を形成する重合工程と、
前記第二金属部材の表面側から回転する前記回転ツールの攪拌ピンを挿入し、前記攪拌ピンのみを前記第二金属部材、又は、前記第一金属部材及び前記第二金属部材に接触させた状態で前記突合せ部を摩擦攪拌接合して第一塑性化領域を形成する第一摩擦攪拌工程と、
前記重合部を摩擦攪拌接合する第二摩擦攪拌工程と、を含み、
前記第二摩擦攪拌工程では、前記第一塑性化領域を通るように前記回転ツールの移動ルートを設定することを特徴とする接合方法。 A joining method for joining a first metal member and a second metal member using a rotating tool equipped with a stirring pin.
A preparatory step of forming a protruding portion protruding from the surface of the first metal member and forming a hole on the back surface of the second metal member.
The front surface of the first metal member and the back surface of the second metal member were overlapped to form a polymerized portion, and the protrusion was inserted into the hole so that the hole and the protrusion were abutted against each other. The polymerization process to form the butt and
A state in which a stirring pin of the rotating tool that rotates from the surface side of the second metal member is inserted, and only the stirring pin is brought into contact with the second metal member, or the first metal member and the second metal member. In the first friction stir welding step of forming the first plasticized region by friction stir welding the butt joints in
Including a second friction stir step of friction stir welding of the polymerized portions.
In the second friction stir welding step, a joining method characterized in that a moving route of the rotating tool is set so as to pass through the first plasticized region . 前記重合工程の前に、前記第一金属部材の表面及び前記第二金属部材の裏面の少なくとも一方に溝又は凹部を形成することを特徴とする請求項２に記載の接合方法。 The joining method according to claim 2 , wherein a groove or a recess is formed on at least one of the front surface of the first metal member and the back surface of the second metal member before the polymerization step.

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