JP2017024045A - Welding method - Google Patents

Welding method Download PDF

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JP2017024045A
JP2017024045A JP2015145373A JP2015145373A JP2017024045A JP 2017024045 A JP2017024045 A JP 2017024045A JP 2015145373 A JP2015145373 A JP 2015145373A JP 2015145373 A JP2015145373 A JP 2015145373A JP 2017024045 A JP2017024045 A JP 2017024045A
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metal member
shoulder portion
friction
butting
groove
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JP6578782B2 (en
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堀　久司
Hisashi Hori
久司 堀
伸城 瀬尾
Nobushiro Seo
伸城 瀬尾
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Nippon Light Metal Co Ltd
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Nippon Light Metal Co Ltd
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Priority to JP2015145373A priority Critical patent/JP6578782B2/en
Priority to CN201680041860.7A priority patent/CN107848064A/en
Priority to PCT/JP2016/068074 priority patent/WO2017013978A1/en
Priority to US15/744,707 priority patent/US20180207745A1/en
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Abstract

PROBLEM TO BE SOLVED: To provide a welding method capable of preventing burrs from being generated at a surface of a first metal material, and reducing the load applied to a friction stirring device.SOLUTION: The welding method includes: a butting step of butting a back surface 1c of a first metal material 1 having a recessed groove 3 at a front surface 1b, against an end surface 2a of a second metal material 2, and forming a butting portion J; and a friction stirring step of inserting a stirring pin G2 of a rotary tool G into the recessed groove 3, and relatively moving the rotary tool G along the recessed groove 3, to friction stir weld the butting portion J. A diameter of a shoulder portion G1 of the rotary tool is set smaller than a width of the recessed groove 3. At the friction stirring step, the shoulder portion G1 of the rotary tool G is inserted into the recessed groove 3, and then the butting portion J is friction stir welded, while the shoulder portion G1 is pressing burrs V generated from the first metal material 1, the shoulder portion G1 being spaced apart from a bottom surface 3a of the recessed groove 3.SELECTED DRAWING: Figure 2

Description

本発明は、板状の金属部材同士の接合方法に関する。   The present invention relates to a method for joining plate-shaped metal members.

特許文献１には、板状の第一金属部材と板状の第二金属部材とをＴ字状に突き合わせて接合する接合方法が開示されている。当該接合方法では、第一金属部材の裏面と第二金属部材の端面とを突き合わせて突合せ部を形成する突合せ工程と、第一金属部材の表面から回転ツールを押し込んで突合せ部を摩擦攪拌接合する摩擦攪拌工程とを行う。   Patent Document 1 discloses a joining method in which a plate-like first metal member and a plate-like second metal member are butted together in a T shape. In this joining method, a back surface of the first metal member and an end surface of the second metal member are butted together to form a butted portion, and a rotating tool is pushed from the surface of the first metal member to frictionally weld the butted portion. And a friction stirring step.

特許第３９４７２７１号公報Japanese Patent No. 3947271

従来の接合方法では、回転ツールのショルダ部の下端面を第一金属部材の表面に押し込んで摩擦攪拌工程を行うため、第一金属部材の表面にバリが発生する。そのため、バリを除去するバリ除去工程を行わなければならない。また、回転ツールのショルダ部の下端面を第一金属部材の表面に押し込んで摩擦攪拌工程を行うため、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 conventional joining method, the lower end surface of the shoulder portion of the rotary tool is pushed into the surface of the first metal member to perform the friction stirring step, so that burrs are generated on the surface of the first metal member. For this reason, a burr removal process for removing the burr must be performed. Moreover, since the lower end surface of the shoulder portion of the rotary tool is pushed into the surface of the first metal member to perform the friction stirring step, there is a problem that the load applied to the friction stirring device increases.

このような観点から、本発明は、第一金属部材の表面にバリが発生するのを防ぐことができるとともに、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特徴とする。   From such a viewpoint, the present invention provides a joining method that can prevent burrs from being generated on the surface of the first metal member and can reduce the load applied to the friction stirrer. To do.

このような課題を解決するために本発明は、板状を呈し表面に凹溝を有する第一金属部材の裏面と板状の第二金属部材の端面とを突き合わせて突合せ部を形成する突合せ工程と、前記第一金属部材の表面側から前記凹溝に回転ツールの攪拌ピンを挿入し、前記回転ツールを前記凹溝に沿って相対移動させて、前記突合せ部を摩擦攪拌接合する摩擦攪拌工程と、を含み、前記回転ツールは、円柱状を呈するショルダ部と前記ショルダ部から垂下する攪拌ピンとを有し、前記ショルダ部の直径を前記凹溝の幅よりも小さく設定し、前記摩擦攪拌工程において、前記回転ツールのショルダ部を前記凹溝内に挿入し、前記ショルダ部を前記凹溝の底面から離間させた状態で、前記第一金属部材から発生するバリを前記ショルダ部で押さえつつ、前記突合せ部を摩擦攪拌接合することを特徴とする。   In order to solve such problems, the present invention provides a butting step in which the back surface of the first metal member having a plate shape and having a concave groove on the surface and the end surface of the plate-shaped second metal member are butted to form a butting portion. And a friction stirring step of inserting a stirring pin of a rotary tool into the concave groove from the surface side of the first metal member, relatively moving the rotary tool along the concave groove, and friction stir welding the butted portion The rotating tool includes a shoulder portion having a cylindrical shape and an agitating pin depending from the shoulder portion, the diameter of the shoulder portion is set smaller than the width of the concave groove, and the friction agitating step In the state where the shoulder portion of the rotating tool is inserted into the concave groove, and the shoulder portion is separated from the bottom surface of the concave groove, the burr generated from the first metal member is pressed by the shoulder portion, Said bump Characterized by friction stir welding was part.

かかる方法によれば、凹溝の底面、凹溝の両側壁及びショルダ部の下端面で狭い空間が形成されるため、バリが散飛するのを防ぐとともに凹溝の底面にバリを堆積させることができる。これにより、第一金属部材の表面にバリが発生するのを防ぐことができる。また、凹溝の底面にショルダ部を押し込まないため、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 such a method, a narrow space is formed on the bottom surface of the groove, both side walls of the groove and the lower end surface of the shoulder portion, so that burrs are prevented from being scattered and burrs are deposited on the bottom surface of the groove. Can do. Thereby, it can prevent that a burr | flash generate | occur | produces on the surface of a 1st metal member. Moreover, since a shoulder part is not pushed in into the bottom face of a ditch | groove, the load concerning a friction stirrer can be made small.

また、前記第二金属部材の板厚は、前記凹溝の幅よりも大きく設定することが好ましい。かかる接合方法によれば、回転ツールの攪拌ピンによって塑性流動化した金属部材の材料が、第一金属部材の裏面と板状の第二金属部材の端面との突合せ部から飛び出ることを確実に防止することができる。   The plate thickness of the second metal member is preferably set larger than the width of the concave groove. According to such a joining method, the material of the metal member plastically fluidized by the stirring pin of the rotary tool is reliably prevented from jumping out from the abutting portion between the back surface of the first metal member and the end surface of the plate-like second metal member. can do.

本発明に係る接合方法によれば、第一金属部材の表面にバリが発生するのを防ぐことができるとともに、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, it is possible to prevent burrs from being generated on the surface of the first metal member and to reduce the load applied to the friction stirrer.

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斜視図である。It is a perspective view which shows the butt | matching 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摩擦攪拌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 friction stirring 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摩擦攪拌工程後を示す断面図である。It is sectional drawing which shows the friction stirring process after the joining method which concerns on 1st embodiment. 第一実施形態に係る接合方法の変形例を示す断面図である。It is sectional drawing which shows the modification 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突合工程を示す断面図である。It is sectional drawing which shows the butt | matching process of the joining method which concerns on 2nd embodiment of this invention. （ａ）は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り、（ｂ）は第二摩擦攪拌工程を示す断面図である。(A) is sectional drawing which shows the 1st friction stirring process of the joining method which concerns on 2nd embodiment, (b) is sectional drawing which shows a 2nd friction stirring process.

［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、第一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Ｔ字状に突き合わせて接合する。第一実施形態に係る接合方法は、突合せ工程と、摩擦攪拌工程とを行う。なお、説明における「表面」とは、「裏面」に対する反対側の面という意味である。 [First embodiment]
A joining method according to a first embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, in the joining method according to the first embodiment, the first metal member 1 and the second metal member 2 are butted in a T shape and joined. The joining method according to the first embodiment performs a butt process and a friction stirring process. In the description, “front surface” means a surface opposite to the “back surface”.

第一金属部材１は、板状の金属部材である。第一金属部材１の材料は、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。第一金属部材１の表面には、断面矩形の凹溝３が形成されている。凹溝３は、第一金属部材１の延長方向に延設されている。第二金属部材２は、板状の金属部材である。第二金属部材２の板厚寸法は適宜設定すればよいが、本実施形態では凹溝３の幅よりも大きく形成されている。第二金属部材２の材料は、前記した摩擦攪拌可能な金属から適宜選択すればよいが、第一金属部材１と同等の材料であることが好ましい。   The first metal member 1 is a plate-like metal member. The material of the first metal member 1 is 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. A concave groove 3 having a rectangular cross section is formed on the surface of the first metal member 1. The concave groove 3 is extended in the extending direction of the first metal member 1. The second metal member 2 is a plate-like metal member. Although the plate | board thickness dimension of the 2nd metal member 2 should just be set suitably, it is formed larger than the width | variety of the ditch | groove 3 in this embodiment. The material of the second metal member 2 may be appropriately selected from the metals that can be frictionally stirred, but is preferably the same material as that of the first metal member 1.

突合せ工程は、図１に示すように、第一金属部材１の裏面１ｃと、第二金属部材２の端面２ａとを正面視Ｔ字状に突き合わせる工程である。突合せ工程では、凹溝３の対応する位置に第二金属部材２の端面２ａを突き合わせる。第一金属部材１の裏面１ｃと第二金属部材２の端面２ａとを突き合わせることにより突合せ部Ｊが形成される。   As shown in FIG. 1, the butting process is a process of butting the back surface 1 c of the first metal member 1 and the end surface 2 a of the second metal member 2 in a T shape when viewed from the front. In the butting step, the end surface 2a of the second metal member 2 is butted against the corresponding position of the groove 3. A butted portion J is formed by butting the back surface 1 c of the first metal member 1 and the end surface 2 a of the second metal member 2.

摩擦攪拌工程は、図２の（ａ）及び（ｂ）に示すように、回転ツールＧのショルダ部Ｇ１を凹溝３内に挿入して突合せ部Ｊを摩擦攪拌接合する工程である。回転ツールＧは、円柱状のショルダ部Ｇ１と、ショルダ部Ｇ１の下端面Ｇ１ａから垂下する攪拌ピンＧ２とで構成されている。ショルダ部Ｇ１の外径は、凹溝３の幅よりも若干小さく形成されている。ショルダ部Ｇ１の外径は、ショルダ部Ｇ１の外周面と凹溝３の側壁３ｂ，３ｂとが接触するように設定してもよいが、摩擦攪拌工程を行う際に、ショルダ部Ｇ１の外周面と凹溝３の側壁３ｂ，３ｂとがわずかな隙間をあけて相対移動可能な寸法であることが好ましい。   As shown in FIGS. 2A and 2B, the friction stirring step is a step in which the shoulder portion G1 of the rotary tool G is inserted into the groove 3 and the butt portion J is friction stir welded. The rotary tool G includes a cylindrical shoulder portion G1 and a stirring pin G2 that hangs down from the lower end surface G1a of the shoulder portion G1. The outer diameter of the shoulder portion G <b> 1 is formed slightly smaller than the width of the concave groove 3. The outer diameter of the shoulder portion G1 may be set so that the outer peripheral surface of the shoulder portion G1 and the side walls 3b, 3b of the concave groove 3 are in contact with each other. However, when performing the friction stirring step, the outer peripheral surface of the shoulder portion G1 And the side walls 3b, 3b of the groove 3 are preferably of a size that allows relative movement with a slight gap.

攪拌ピンＧ２は、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。本実施形態では、回転ツールＧを右回転させるため、攪拌ピンＧ２の螺旋溝は、基端から先端に向かうにつれて左回りに形成されている。言い換えると、螺旋溝は、螺旋溝を基端から先端に向けてなぞると上から見て左回りに形成されている。   The stirring pin G2 is tapered. A spiral groove is formed on the outer peripheral surface of the stirring pin G2. In this embodiment, in order to rotate the rotary tool G to the right, the spiral groove of the stirring pin G2 is formed counterclockwise as it goes from the proximal end to the distal end. In other words, the spiral groove is formed counterclockwise as viewed from above when the spiral groove is traced from the proximal end to the distal end.

なお、回転ツールＧを左回転させる場合は、螺旋溝を基端から先端に向かうにつれて右回りに形成することが好ましい。言い換えると、この場合の螺旋溝は、螺旋溝を基端から先端に向けてなぞると上から見て右回りに形成されている。螺旋溝をこのように設定することで、摩擦攪拌工程の際に塑性流動化した金属が螺旋溝によって攪拌ピンＧ２の先端側に導かれる。これにより、凹溝３の底面３ａから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 G counterclockwise, it is preferable to form the spiral groove clockwise as it goes from the proximal end to the distal end. In other words, the spiral groove in this case is formed clockwise when viewed from above when the spiral groove is traced from the proximal end to the distal end. By setting the spiral groove in this manner, the plastic fluidized metal in the friction stirring step is guided to the tip side of the stirring pin G2 by the spiral groove. Thereby, the quantity of the metal which overflows from the bottom face 3a of the ditch | groove 3 can be decreased.

摩擦攪拌工程では、回転ツールＧの攪拌ピンＧ２を第一金属部材１の表面１ｂ側から凹溝３の底面３ａの中央に挿入し、突合せ部Ｊ（凹溝３）に沿って回転ツールＧを相対移動させる。回転ツールＧの挿入深さは、適宜設定すればよいが、本実施形態では、攪拌ピンＧ２が第二金属部材２に達するように、つまり、第一金属部材１及び第二金属部材２と攪拌ピンＧ２とを接触させた状態で摩擦攪拌接合を行う。回転ツールＧの移動軌跡には塑性化領域Ｗが形成される。   In the friction stirring step, the stirring pin G2 of the rotary tool G is inserted into the center of the bottom surface 3a of the concave groove 3 from the surface 1b side of the first metal member 1, and the rotary tool G is moved along the abutting portion J (concave groove 3). Move relative. The insertion depth of the rotary tool G may be set as appropriate, but in this embodiment, the stirring pin G2 reaches the second metal member 2, that is, the first metal member 1 and the second metal member 2 are stirred. Friction stir welding is performed with the pin G2 in contact. A plasticized region W is formed in the movement locus of the rotary tool G.

また、摩擦攪拌工程では、ショルダ部Ｇ１の下端面Ｇ１ａを、凹溝３の底面３ａから離間させ、かつ、第一金属部材１の表面１ｂよりも低い位置に設定している。つまり、摩擦攪拌工程では、摩擦攪拌によって発生するバリＶをショルダ部Ｇ１の下端面Ｇ１ａで押さえ込みつつ摩擦攪拌接合を行う。特許請求の範囲の「前記ショルダ部を前記凹溝の底面から離間させた状態」とは、バリＶが発生する前の凹溝３の底面３ａからショルダ部Ｇ１の下端面Ｇ１ａを離間させるという意味である。また、特許請求の範囲の「前記第一金属部材から発生するバリを前記ショルダ部で押さえつつ」とは、堆積するバリＶとショルダ部Ｇ１の下端面Ｇ１ａとが接触しており、バリＶの表面（上面）をショルダ部Ｇ１の下端面Ｇ１ａによって押さえるという意味である。   Further, in the friction stirring step, the lower end surface G1a of the shoulder portion G1 is set apart from the bottom surface 3a of the groove 3 and lower than the surface 1b of the first metal member 1. That is, in the friction stirring step, friction stir welding is performed while pressing the burr V generated by the friction stirring with the lower end surface G1a of the shoulder portion G1. “The state in which the shoulder portion is separated from the bottom surface of the concave groove” in the claims means that the lower end surface G1a of the shoulder portion G1 is separated from the bottom surface 3a of the concave groove 3 before the burr V is generated. It is. In addition, the phrase “while pressing the burr generated from the first metal member with the shoulder portion” in the claims means that the accumulated burr V and the lower end surface G1a of the shoulder portion G1 are in contact with each other. This means that the surface (upper surface) is pressed by the lower end surface G1a of the shoulder portion G1.

また、ショルダ部Ｇ１の外周面と凹溝３の側壁３ｂ，３ｂとはわずかな隙間をあけて離間している。凹溝３の底面３ａ、凹溝３の側壁３ｂ，３ｂ及びショルダ部Ｇ１の下端面Ｇ１ａで狭い空間が形成されている。   Further, the outer peripheral surface of the shoulder portion G1 and the side walls 3b, 3b of the concave groove 3 are separated from each other with a slight gap. A narrow space is formed by the bottom surface 3a of the concave groove 3, the side walls 3b, 3b of the concave groove 3, and the lower end surface G1a of the shoulder portion G1.

なお、攪拌ピンＧ２は、第二金属部材２に達しないように設定してもよい。つまり、摩擦攪拌工程では、第一金属部材１と攪拌ピンＧ２のみとが接触するように攪拌ピンＧ２の挿入深さを設定してもよい。このように、攪拌ピンＧ２の先端が、第二金属部材２に達しないように設定する場合は、第一金属部材１と攪拌ピンＧ２との摩擦熱によって突合せ部Ｊの周囲の金属が塑性流動化して第一金属部材１と第二金属部材２とが接合するようにする。   The agitation pin G2 may be set so as not to reach the second metal member 2. That is, in the friction stirring step, the insertion depth of the stirring pin G2 may be set so that only the first metal member 1 and the stirring pin G2 are in contact with each other. Thus, when setting so that the front-end | tip of the stirring pin G2 may not reach the 2nd metal member 2, the metal around the butt | matching part J plastically flows by the frictional heat of the 1st metal member 1 and the stirring pin G2. And the first metal member 1 and the second metal member 2 are joined.

摩擦攪拌工程によって凹溝３の底面３ａにバリＶが発生するが、凹溝３の底面３ａ、凹溝３の側壁３ｂ，３ｂ及びショルダ部Ｇ１の下端面Ｇ１ａで構成された狭い空間（断面矩形の閉空間）に当該バリＶが閉じ込められ、底面３ａにバリＶが堆積する。図３に示すように、バリＶは、凹溝３内に収容されるとともに、バリＶの表面（上面）は、ショルダ部Ｇ１の下端面Ｇ１ａによって押さえられて略平坦になる。   A burr V is generated on the bottom surface 3a of the groove 3 by the friction stir process. However, a narrow space (rectangular cross section) formed by the bottom surface 3a of the groove 3, the side walls 3b and 3b of the groove 3, and the lower end surface G1a of the shoulder portion G1. The burr V is confined in the closed space), and the burr V is deposited on the bottom surface 3a. As shown in FIG. 3, the burr V is accommodated in the concave groove 3, and the surface (upper surface) of the burr V is pressed by the lower end surface G1a of the shoulder portion G1 and becomes substantially flat.

以上説明した本実施形態に係る接合方法によれば、摩擦攪拌工程を行う際に、凹溝３の底面３ａ、凹溝３の側壁３ｂ，３ｂ及びショルダ部Ｇ１の下端面Ｇ１ａで狭い空間が形成されるため、バリＶが散飛するのを防ぐとともに凹溝３の底面３ａにバリＶを堆積させることができる。これにより、第一金属部材１の表面１ｂにバリＶが発生するのを防ぐことができる。よって、第一金属部材１の表面１ｂのバリ除去工程等の表面処理を省略化することができる。   According to the joining method according to the present embodiment described above, a narrow space is formed by the bottom surface 3a of the concave groove 3, the side walls 3b and 3b of the concave groove 3, and the lower end face G1a of the shoulder portion G1 when performing the friction stirring process. Therefore, it is possible to prevent the burrs V from being scattered and to deposit the burrs V on the bottom surface 3 a of the concave groove 3. Thereby, generation | occurrence | production of the burr | flash V on the surface 1b of the 1st metal member 1 can be prevented. Therefore, the surface treatment such as the burr removing process on the surface 1b of the first metal member 1 can be omitted.

また、本実施形態に係る接合方法によれば、凹溝３の底面３ａにショルダ部Ｇ１を押し込まないため、摩擦攪拌装置にかかる負荷を小さくすることができる。また、本実施形態では、第二金属部材２の板厚寸法を凹溝３の幅よりも大きく設定しているため、回転ツールＧの攪拌ピンＧ２によって塑性流動化した材料が、第一金属部材１の裏面１ｂと板状の第二金属部材２の端面２ａとの突合せ部Ｊから飛び出ることを確実に防止することができる。
なお、摩擦攪拌工程を行う前に、第一金属部材１と第二金属部材２とで構成される内隅に溶接を行う溶接工程を行ってもよい。溶接工程を行うことで、摩擦攪拌接合を安定して行うことができる。 Moreover, according to the joining method which concerns on this embodiment, since the shoulder part G1 is not pushed in into the bottom face 3a of the ditch | groove 3, the load concerning a friction stirrer can be made small. Moreover, in this embodiment, since the plate | board thickness dimension of the 2nd metal member 2 is set larger than the width | variety of the ditch | groove 3, the material plastically fluidized with the stirring pin G2 of the rotary tool G is the 1st metal member. 1 can be reliably prevented from jumping out from the abutting portion J between the back surface 1b of 1 and the end surface 2a of the plate-like second metal member 2.
In addition, you may perform the welding process which welds to the inner corner comprised by the 1st metal member 1 and the 2nd metal member 2 before performing a friction stirring process. By performing the welding process, friction stir welding can be performed stably.

［変形例］
図４は、第一実施形態に係る接合方法の変形例を示す断面図である。図４に示すように、第一金属部材１と第二金属部材２とを正面視Ｌ字状に突き合わせてもよい。つまり、変形例に係る突合せ工程では、第一金属部材１の裏面１ｃと第二金属部材２の端面２ａとを突き合わせつつ、第一金属部材１の端面１ａと第二金属部材２の側面２ｃとが面一になるように突き合わせる。変形例では、突合せ工程を除いては第一実施形態と略同等であるため、詳細な説明は省略する。当該変形例によっても第一実施形態と同様の効果を得ることができる。 [Modification]
FIG. 4 is a cross-sectional view showing a modification of the joining method according to the first embodiment. As shown in FIG. 4, the first metal member 1 and the second metal member 2 may be butted in an L shape when viewed from the front. That is, in the butting process according to the modified example, the back surface 1c of the first metal member 1 and the end surface 2a of the second metal member 2 are butted, while the end surface 1a of the first metal member 1 and the side surface 2c of the second metal member 2 are Butt so that is the same. Since the modification is substantially the same as the first embodiment except for the matching step, detailed description is omitted. The effect similar to 1st embodiment can be acquired also by the said modification.

［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。図５及び図６に示すように、第二実施形態に係る接合方法では、一対の第一金属部材１（１Ａ，１Ｂ）と複数の第二金属部材２とを接合して構造物Ｚを形成する。 [Second Embodiment]
Next, the joining method according to the second embodiment of the present invention will be described. As shown in FIG.5 and FIG.6, in the joining method which concerns on 2nd embodiment, a pair of 1st metal member 1 (1A, 1B) and the some 2nd metal member 2 are joined, and the structure Z is formed. To do.

第一金属部材１Ａは、板状を呈する金属部材である。第一金属部材１Ａの表面１ｂには、複数の凹溝３が形成されている。凹溝３は、所定の間隔をあけて形成されている。第一金属部材１Ｂは、第一金属部材１Ａと同等の部材である。第二実施形態に係る接合方法では、突合せ工程と、摩擦攪拌工程とを行う。   The first metal member 1A is a metal member having a plate shape. A plurality of concave grooves 3 are formed on the surface 1b of the first metal member 1A. The concave grooves 3 are formed at a predetermined interval. The first metal member 1B is a member equivalent to the first metal member 1A. In the joining method according to the second embodiment, a butt process and a friction stirring process are performed.

突合せ工程は、第一金属部材１Ａ，１Ｂと複数の第二金属部材２とを突き合わせて複数の突合せ部Ｊ１，Ｊ２を形成する工程である。突合せ工程では、第一金属部材１Ａの裏面１ｃと、複数の第二金属部材２の一方の端面２ａとを突き合わせて複数の突合せ部Ｊ１を形成する。第二金属部材２の一方の端面２ａは、第一金属部材１Ａの凹溝３に対応する位置に突き合わせる。また、突合せ工程では、第一金属部材１Ｂの裏面１ｃと、複数の第二金属部材２の他方の端面２ａとを突き合わせて複数の突合せ部Ｊ２を形成する。第二金属部材２の他方の端面２ａは、第一金属部材１Ｂの凹溝３に対応する位置に突き合わせる。   The butting process is a process in which the first metal members 1A and 1B and the plurality of second metal members 2 are butted to form a plurality of butting portions J1 and J2. In the butting step, the back surface 1c of the first metal member 1A and the one end surface 2a of the plurality of second metal members 2 are butted to form a plurality of butting portions J1. One end surface 2a of the second metal member 2 abuts at a position corresponding to the groove 3 of the first metal member 1A. In the butting step, the back surface 1c of the first metal member 1B and the other end surface 2a of the plurality of second metal members 2 are butted to form a plurality of butting portions J2. The other end surface 2a of the second metal member 2 abuts at a position corresponding to the groove 3 of the first metal member 1B.

摩擦攪拌工程は、第一金属部材１Ａと第二金属部材２とで形成された突合せ部Ｊ１を接合する第一摩擦攪拌工程と、第一金属部材１Ｂと第二金属部材２とで形成された突合せ部Ｊ２を接合する第二摩擦攪拌工程とを行う。図６の（ａ）に示すように、第一摩擦攪拌工程では、回転ツールＧを用いて突合せ部Ｊ１を摩擦攪拌接合する。第一摩擦攪拌工程は、第一実施形態の摩擦攪拌工程と同等であるため、詳細な説明は省略する。また、図６の（ｂ）に示すように、第二摩擦攪拌工程では、回転ツールＧを用いて突合せ部Ｊ２を摩擦攪拌接合する。第二摩擦攪拌工程は、第一実施形態の摩擦攪拌工程と同等であるため、詳細な説明は省略する。   The friction agitation step was formed by the first friction agitation step for joining the butted portion J1 formed by the first metal member 1A and the second metal member 2, and the first metal member 1B and the second metal member 2. A second friction stirring step of joining the butt J2 is performed. As shown in FIG. 6A, in the first friction agitation step, the abutting portion J1 is friction agitated and joined using the rotary tool G. Since the first friction stirring step is equivalent to the friction stirring step of the first embodiment, detailed description thereof is omitted. In addition, as shown in FIG. 6B, in the second friction stirring step, the butt portion J2 is friction stir welded using the rotary tool G. Since the second friction stirring step is equivalent to the friction stirring step of the first embodiment, detailed description thereof is omitted.

第二実施形態に係る接合方法によれば、内部に断面視矩形の複数の中空部Ｘを備えた構造物Ｚを形成することができる。また、第二実施形態に係る接合方法によれば、凹溝３の底面３ａ、凹溝３の側壁３ｂ，３ｂ及びショルダ部Ｇ１の下端面Ｇ１ａで狭い空間が形成されるため、バリＶが散飛するのを防ぐとともに凹溝３の底面３ａにバリＶを堆積させることができる。これにより、第一金属部材１Ａの表面１ｂ及び第一金属部材１Ｂの表面１ｂにバリＶが発生するのを防ぐことができる。また、本実施形態に係る接合方法によれば、凹溝３の底面３ａにショルダ部Ｇ１を押し込まないため、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 which concerns on 2nd embodiment, the structure Z provided with the some hollow part X of a cross sectional view rectangle inside can be formed. Further, according to the joining method according to the second embodiment, since the narrow space is formed by the bottom surface 3a of the concave groove 3, the side walls 3b and 3b of the concave groove 3, and the lower end face G1a of the shoulder portion G1, the burr V is scattered. It is possible to prevent flying and to deposit burrs V on the bottom surface 3 a of the groove 3. Thereby, it can prevent that the burr | flash V generate | occur | produces on the surface 1b of 1 A of 1st metal members, and the surface 1b of the 1st metal member 1B. Moreover, according to the joining method which concerns on this embodiment, since the shoulder part G1 is not pushed in into the bottom face 3a of the ditch | groove 3, the load concerning a friction stirrer can be made small.

１ 第一金属部材
１ｂ 表面
１ｃ 裏面
２ 第二金属部材
２ｂ 表面
２ｃ 裏面
３ 凹溝
Ｊ 突合せ部
Ｇ 回転ツール
Ｇ１ ショルダ部
Ｇ２ 攪拌ピン
Ｗ 塑性化領域 DESCRIPTION OF SYMBOLS 1 1st metal member 1b surface 1c back surface 2 2nd metal member 2b surface 2c back surface 3 concave groove J butt | matching part G rotating tool G1 shoulder part G2 stirring pin W plasticizing area | region

Claims (2)

板状を呈し表面に凹溝を有する第一金属部材の裏面と板状の第二金属部材の端面とを突き合わせて突合せ部を形成する突合せ工程と、
前記第一金属部材の表面側から前記凹溝に回転ツールの攪拌ピンを挿入し、前記回転ツールを前記凹溝に沿って相対移動させて、前記突合せ部を摩擦攪拌接合する摩擦攪拌工程と、を含み、
前記回転ツールは、円柱状を呈するショルダ部と前記ショルダ部から垂下する攪拌ピンとを有し、前記ショルダ部の直径を前記凹溝の幅よりも小さく設定し、
前記摩擦攪拌工程において、前記回転ツールのショルダ部を前記凹溝内に挿入し、前記ショルダ部を前記凹溝の底面から離間させた状態で、前記第一金属部材から発生するバリを前記ショルダ部で押さえつつ、前記突合せ部を摩擦攪拌接合することを特徴とする接合方法。 A butting step of forming a butting portion by butting the back surface of the first metal member having a plate shape and having a concave groove on the surface and the end surface of the plate-like second metal member;
A friction stirring step of inserting a stirring pin of a rotary tool into the concave groove from the surface side of the first metal member, moving the rotary tool relatively along the concave groove, and friction stir welding the butted portion; Including
The rotating tool has a shoulder portion that has a cylindrical shape and a stirring pin that hangs down from the shoulder portion, and sets the diameter of the shoulder portion to be smaller than the width of the concave groove,
In the friction stirring step, the shoulder portion of the rotating tool is inserted into the groove, and the burr generated from the first metal member in the state where the shoulder portion is separated from the bottom surface of the groove is the shoulder portion. The joining method is characterized in that the abutting portion is friction stir welded while being held down. 前記第二金属部材の板厚は、前記凹溝の幅よりも大きく設定することを特徴とする請求項１に記載の接合方法。   The joining method according to claim 1, wherein a plate thickness of the second metal member is set to be larger than a width of the concave groove.
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PCT/JP2016/068074 WO2017013978A1 (en) 2015-07-23 2016-06-17 Joining method and method for manufacturing heat sink
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009018348A (en) * 2008-10-29 2009-01-29 Nippon Light Metal Co Ltd Method of joining thick material, and joined structure
JP2015089550A (en) * 2013-11-05 2015-05-11 武蔵精密工業株式会社 Method for joining different materials

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009018348A (en) * 2008-10-29 2009-01-29 Nippon Light Metal Co Ltd Method of joining thick material, and joined structure
JP2015089550A (en) * 2013-11-05 2015-05-11 武蔵精密工業株式会社 Method for joining different materials

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