JP2006315067A - Friction agitation welding device - Google Patents

Friction agitation welding device Download PDF

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JP2006315067A
JP2006315067A JP2005142397A JP2005142397A JP2006315067A JP 2006315067 A JP2006315067 A JP 2006315067A JP 2005142397 A JP2005142397 A JP 2005142397A JP 2005142397 A JP2005142397 A JP 2005142397A JP 2006315067 A JP2006315067 A JP 2006315067A
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stir welding
friction stir
motor
welding tool
rotation
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JP4538371B2 (en
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Hiroki Hashimoto
裕樹 橋本
Yasunari Wakizaka
泰成 脇坂
Shigenori Yoshimi
重則 吉見
Katsuya Matsumoto
克也 松本
Satoshi Okubo
聡士 大久保
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Honda Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a friction agitation welding device which is miniaturized, and capable of simplifying a configuration thereof, and increasing the response speed. <P>SOLUTION: The friction agitation welding device 10 has a first motor 26 to rotate a friction agitation welding tool 16 and a second motor 28 to turn a ball screw 20. When the second motor 28 is energized, a nut 72 is lowered following the rotation of the ball screw 20, a displacement unit 58 is lowered according thereto, and the friction agitation welding tool 16 is lowered along a linear guide 44 together with a casing 18. Thereafter, when the first motor 26 is energized, the friction agitation welding tool 16 is integrally turned with a cover member 22. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、複数個の部材が積層されて形成された積層部を接合するための摩擦撹拌接合装置に関する。   The present invention relates to a friction stir welding apparatus for joining laminated portions formed by laminating a plurality of members.

部材同士を積層させ、その積層部を接合する方法としては、アーク溶接が一般的であるが、近年、積層部の肉を摩擦熱で軟化して塑性流動させ、その後、該肉を硬化する、いわゆる摩擦撹拌によるスポット接合が提案されている。摩擦撹拌接合には、アーク接合と比較した場合、ワークの温度上昇を抑制することができるので接合後のワークの歪みがほとんどなく、アークを発生させる必要がないので低コストであり、しかも、溶接ビードが形成されることがないので外観が良好である等の利点がある。その上、リベット接合等と比較して、ボルト・ナット、リベットの締結部品が不要となり、また、作業が簡素である。   As a method of laminating members and joining the laminated parts, arc welding is generally used, but recently, the meat of the laminated parts is softened by frictional heat and plastically flowed, and then the meat is cured. Spot welding by so-called friction stirring has been proposed. Compared with arc welding, friction stir welding can suppress the temperature rise of the workpiece, so there is almost no distortion of the workpiece after joining, and it is not necessary to generate an arc. Since no bead is formed, there are advantages such as good appearance. In addition, bolts / nuts and rivet fastening parts are not required, and the operation is simpler than rivet joining.

摩擦撹拌接合を実施するための摩擦撹拌接合装置は、例えば、特許文献１に記載されているように、ロボットのアーム部に摩擦撹拌接合用工具と受治具とが互いに対向するように設置されて構成され、さらに、摩擦撹拌接合用工具を回転動作させる第１モータと、前記摩擦撹拌接合用工具をワークに対して変位させるための変位手段を回転動作させる第２モータとを有する。   A friction stir welding apparatus for performing friction stir welding is installed, for example, as described in Patent Document 1 on a robot arm so that a friction stir welding tool and a receiving jig face each other. And a first motor for rotating the friction stir welding tool, and a second motor for rotating the displacement means for displacing the friction stir welding tool with respect to the workpiece.

この摩擦撹拌接合装置で摩擦撹拌接合を行うに際しては、下方に配置された受治具に積層部が載置される。そして、第１モータの作用下に回転動作した摩擦撹拌接合用工具が第２モータの作用下に積層部に指向して下降動作し、最終的に、摩擦撹拌接合用工具のプローブが積層部に埋没する。この埋没に伴って、積層部の肉が摩擦撹拌される。   When performing friction stir welding with this friction stir welding apparatus, the laminated portion is placed on a receiving jig disposed below. Then, the friction stir welding tool rotated under the action of the first motor moves downward toward the laminated part under the action of the second motor, and finally the probe of the friction stir welding tool is moved to the laminated part. Buried. Along with this burying, the meat in the laminated portion is frictionally stirred.

また、特許文献２には、旋回ツール（摩擦撹拌接合用工具）を下方に配設するとともに該旋回ツールに対向して加圧ツールを配設し、加圧モータで加圧ツールを降下させる一方、回転モータで旋回ツールを回転付勢する摩擦撹拌接合装置が提案されている。この場合、旋回ツールと加圧ツールで積層部が挟持された後、旋回ツールが積層部に向かって上昇することになる。   In Patent Document 2, a turning tool (friction stir welding tool) is disposed below, a pressure tool is disposed opposite the turning tool, and the pressure tool is lowered by a pressure motor. There has been proposed a friction stir welding apparatus in which a turning tool is urged to rotate by a rotary motor. In this case, after the laminated portion is sandwiched between the turning tool and the pressure tool, the turning tool is raised toward the laminated portion.

特開２００３−１２６９６９号公報JP 2003-126969 A 特開２００４−１３６３４６号公報JP 2004-136346 A

特許文献１記載の装置では、第１モータと第２モータとが同一軸線上に配置され、摩擦撹拌接合用工具を回転動作させるための回転軸、及び該回転軸が連結された加圧軸は、装置の奥行き方向において、この軸線と平行となるようにアーム部に配設されている。このような構成では、奥行き方向の寸法が大きくなってしまう。   In the apparatus described in Patent Document 1, the first motor and the second motor are arranged on the same axis, and the rotation shaft for rotating the friction stir welding tool and the pressure shaft to which the rotation shaft is connected are The arm portion is disposed so as to be parallel to the axis in the depth direction of the apparatus. In such a configuration, the dimension in the depth direction becomes large.

また、特許文献２記載の装置では、ワークの重量が過度に大きい場合、該ワークを載置した旋回ツールの回転・上昇が押止され、このために摩擦撹拌が起こらない懸念がある。   Further, in the apparatus described in Patent Document 2, when the weight of the work is excessively large, there is a concern that the rotation / rise of the turning tool on which the work is placed is prevented, and therefore frictional stirring does not occur.

しかも、特許文献１、２記載の装置のいずれも、プーリーとベルトを介して回転用モータと摩擦撹拌接合用工具とを接続している。この場合、回転用モータが回転付勢を開始してから摩擦撹拌接合用工具が回転動作し始めることになるが、このために摩擦撹拌接合用工具の応答が遅く、従って、摩擦撹拌接合用工具の回転速度等を制御することが容易ではない。さらに、構成部品の点数が多いので、装置構成が複雑となり、メンテナンスを行う際に煩雑な作業が必要となる。   In addition, any of the apparatuses described in Patent Documents 1 and 2 connects the rotation motor and the friction stir welding tool via a pulley and a belt. In this case, the friction stir welding tool starts to rotate after the rotation motor starts to urge rotation. For this reason, the response of the friction stir welding tool is slow. It is not easy to control the rotation speed or the like. Furthermore, since the number of component parts is large, the apparatus configuration is complicated, and complicated work is required when performing maintenance.

本発明は上記した問題を解決するためになされたもので、従来技術に係る摩擦撹拌接合装置に比して小型化を図ることが可能であり、回転付勢手段に対する摩擦撹拌接合用工具の応答速度に優れ、しかも、構成が簡素である摩擦撹拌接合装置を提供することを目的とする。   The present invention has been made to solve the above-described problems, and can be downsized as compared with the friction stir welding apparatus according to the prior art, and the response of the friction stir welding tool to the rotation biasing means. An object of the present invention is to provide a friction stir welding apparatus excellent in speed and having a simple configuration.

前記の目的を達成するために、本発明は、複数個の部材が積層されることによって形成された積層部を摩擦撹拌接合するための摩擦撹拌接合装置であって、
アーム部材に互いに対向して配設された受治具及び摩擦撹拌接合用工具と、
前記受治具に載置された前記積層部に対して前記摩擦撹拌接合用工具を接近又は離間する方向に変位させる変位手段と、
前記摩擦撹拌接合用工具を回転動作させる第１回転付勢手段と、
前記変位手段を回転動作させる第２回転付勢手段と、
を有し、
前記第１回転付勢手段と前記第２回転付勢手段とが略同一軸線上に配置され、
前記変位手段と前記摩擦撹拌接合用工具の回転中心が、前記第１回転付勢手段と前記第２回転付勢手段の軸線と略一致していることを特徴とする。 In order to achieve the above object, the present invention is a friction stir welding apparatus for friction stir welding a laminated portion formed by laminating a plurality of members,
A receiving jig and a friction stir welding tool disposed opposite to each other on the arm member;
Displacement means for displacing the friction stir welding tool toward or away from the laminated portion placed on the receiving jig;
First rotation urging means for rotating the friction stir welding tool;
Second rotation urging means for rotating the displacement means;
Have
The first rotation urging means and the second rotation urging means are arranged on substantially the same axis,
The center of rotation of the displacement means and the friction stir welding tool is substantially coincident with the axis of the first rotation urging means and the second rotation urging means.

本発明においては、第１回転付勢手段と第２回転付勢手段とが略同一軸線上に配置されており、さらに、この軸線と、変位手段及び前記摩擦撹拌接合用工具の双方の回転中心とが略一致している。このため、装置が小型化する。   In the present invention, the first rotation urging means and the second rotation urging means are arranged on substantially the same axis, and further, the rotation center of both the axis and the displacement means and the friction stir welding tool. And are almost identical. For this reason, an apparatus is reduced in size.

しかも、このような配置とすることにより、第１回転付勢手段と摩擦撹拌接合用工具とを、プーリー及びベルトを介して連結する必要がなくなる。従って、装置構成が簡素となる。また、摩擦撹拌接合用工具の回転動作の応答速度が向上するとともに、制御することが容易となる。   Moreover, with such an arrangement, it is not necessary to connect the first rotation urging means and the friction stir welding tool via a pulley and a belt. Therefore, the apparatus configuration is simplified. In addition, the response speed of the rotational operation of the friction stir welding tool is improved and the control becomes easy.

前記第１回転付勢手段及び前記第２回転付勢手段は、中空モータとすることが好ましい。中空モータは、中心部に部材を挿通可能な貫通孔ないし挿入可能な挿入孔が設けられているので、第１回転付勢手段及び第２回転付勢手段の軸線と、変位手段及び前記摩擦撹拌接合用工具の双方の回転中心とを容易に略一致させることができ、従って、装置の小型化・簡素化を図ることが容易となる。   It is preferable that the first rotation urging means and the second rotation urging means are hollow motors. Since the hollow motor is provided with a through-hole through which a member can be inserted or an insertion hole into which the hollow motor can be inserted, the axis of the first rotation urging means and the second rotation urging means, the displacement means, and the friction stirrer Both rotation centers of the welding tool can be made to substantially coincide with each other, so that it is easy to downsize and simplify the apparatus.

前記アーム部材の形状は略Ｃ字状であることが好ましい。このような形状とすることにより、適切な剛性を得ることができる。すなわち、アーム部材が撓み難くなり、このために摩擦撹拌接合用工具の回転中心が変位手段の回転中心から偏倚し難くなる。換言すれば、摩擦撹拌接合用工具の軸ズレを防止することができる。なお、「略Ｃ字状」には、隅部が屈曲した「コ」字形状のものも含まれるものとする。   The shape of the arm member is preferably substantially C-shaped. By adopting such a shape, appropriate rigidity can be obtained. That is, it becomes difficult for the arm member to be bent, and for this reason, the rotation center of the friction stir welding tool is not easily deviated from the rotation center of the displacement means. In other words, axial misalignment of the friction stir welding tool can be prevented. The “substantially C shape” includes a “U” shape with a bent corner.

本発明によれば、摩擦撹拌接合用工具を回転動作させる第１回転付勢手段と、変位手段を回転動作させる第２回転付勢手段とを略同一軸線上に配設し、且つこの軸線と、変位手段及び摩擦撹拌接合用工具の回転中心とを略一致させるようにしている。このため、これら摩擦撹拌接合用工具、第１回転付勢手段、変位手段及び第２回転付勢手段が直線状に配列されるので、装置が小型化される。   According to the present invention, the first rotation urging means for rotating the friction stir welding tool and the second rotation urging means for rotating the displacement means are disposed on substantially the same axis, and this axis The rotation means of the displacement means and the friction stir welding tool is made to substantially coincide with each other. For this reason, since these friction stir welding tools, the first rotation urging means, the displacement means, and the second rotation urging means are arranged in a straight line, the apparatus is miniaturized.

また、摩擦撹拌接合用工具と第１回転付勢手段との間にプーリーやベルトを介在させる必要がないので、装置構成が簡素となる。従って、メンテナンスを容易に行うことができる。さらに、この場合、回転付勢手段に対する摩擦撹拌接合用工具の応答速度が向上するとともに、回転動作の制御も容易となる。   Further, since there is no need to interpose a pulley or a belt between the friction stir welding tool and the first rotation urging means, the apparatus configuration is simplified. Therefore, maintenance can be easily performed. Furthermore, in this case, the response speed of the friction stir welding tool with respect to the rotation urging means is improved, and the rotation operation can be easily controlled.

以下、本発明に係る摩擦撹拌接合装置につき好適な実施の形態を挙げ、添付の図面を参照して詳細に説明する。   Preferred embodiments of the friction stir welding apparatus according to the present invention will be described below in detail with reference to the accompanying drawings.

本実施の形態に係る摩擦撹拌接合装置１０の一部縦断面全体側面図を図１に示す。この摩擦撹拌接合装置１０は、略Ｃ字状に屈曲したアーム部材１２と、該アーム部材１２の下端部及び上端部にそれぞれ配設された受治具１４及び摩擦撹拌接合用工具１６とを有し、これら受治具１４と摩擦撹拌接合用工具１６とは、互いに対向している。   FIG. 1 shows an overall side view of a part of the friction stir welding apparatus 10 according to the present embodiment. The friction stir welding apparatus 10 includes an arm member 12 bent in a substantially C shape, a receiving jig 14 and a friction stir welding tool 16 disposed on the lower end portion and the upper end portion of the arm member 12, respectively. The receiving jig 14 and the friction stir welding tool 16 are opposed to each other.

アーム部材１２の上端部には円筒体形状のケーシング１８が連結されており、図２に示すように、前記摩擦撹拌接合用工具１６は、該ケーシング１８内に挿入されてボールねじ２０（変位手段）を囲繞するカバー部材２２の下端面に、ジョイント２４を介して連結されている。なお、該摩擦撹拌接合用工具１６は、その回転中心とボールねじ２０の回転中心とが略一致する位置に配設される。   A cylindrical casing 18 is connected to the upper end of the arm member 12, and as shown in FIG. 2, the friction stir welding tool 16 is inserted into the casing 18 to be inserted into a ball screw 20 (displacement means). ) Is connected to the lower end surface of the cover member 22 through a joint 24. The friction stir welding tool 16 is disposed at a position where the rotation center thereof substantially coincides with the rotation center of the ball screw 20.

また、摩擦撹拌接合装置１０は、摩擦撹拌接合用工具１６を回転動作させる第１モータ２６（第１回転付勢手段）と、ボールねじ２０を回転動作させる第２モータ２８（第２回転付勢手段）とを有し、互いに離間した第１モータ２６と第２モータ２８は、その貫通孔３０、３２の中心位置同士が略一致するように、換言すれば、略同一軸線上に位置するように直列配置されている。第１モータ２６はケーシング１８内に収容されており、一方、第２モータ２８はケーシング１８の外部上方に設置されている。   The friction stir welding apparatus 10 also includes a first motor 26 (first rotation biasing means) that rotates the friction stir welding tool 16 and a second motor 28 (second rotation biasing) that rotates the ball screw 20. The first motor 26 and the second motor 28 that are separated from each other are positioned so that the center positions of the through-holes 30 and 32 substantially coincide with each other, in other words, on the same axis. Are arranged in series. The first motor 26 is accommodated in the casing 18, while the second motor 28 is installed on the outside of the casing 18.

アーム部材１２は、図１の右方に向かうにつれて縦方向寸法が徐々に小さくなる長尺部３４と、該長尺部３４から上方に立ち上がった立ち上がり部３６と、該立ち上がり部３６から図１の右方に屈曲して延在する支持部３８とを有し、これら長尺部３４、立ち上がり部３６、支持部３８とで略Ｃ字状の形状をなしている。このうちの支持部３８は、ケーシング１８の一端面に固定されている。   The arm member 12 has a long portion 34 whose vertical dimension gradually decreases as it goes to the right in FIG. 1, a rising portion 36 that rises upward from the long portion 34, and the rising portion 36 of FIG. The long portion 34, the rising portion 36, and the support portion 38 are substantially C-shaped. Of these, the support portion 38 is fixed to one end surface of the casing 18.

長尺部３４の上端面に設置された前記受治具１４は、互いに直径が異なる複数個の円柱体が、上方に向かうにつれて小径となるように構成されている。後述するように、最上方の円柱体の上端面に積層部が支持される。この受治具１４は、図示しないねじを介して長尺部３４に取り付けられており、従って、アーム部材１２に対して脱着可能である。   The receiving jig 14 installed on the upper end surface of the long portion 34 is configured such that a plurality of cylindrical bodies having different diameters become smaller in diameter toward the upper side. As will be described later, the stacked portion is supported on the upper end surface of the uppermost cylindrical body. The receiving jig 14 is attached to the long portion 34 via a screw (not shown), and therefore can be attached to and detached from the arm member 12.

ケーシング１８の前記一端面において、支持部３８が連結された上方には、図示しない多関節ロボットのアーム４０の先端が連結されている。また、ケーシング１８を挟んでこれら支持部３８及びアーム４０に対向するように、図１及び図２の鉛直上方に指向して延在する連結支持フレーム４２が固定されている。該連結支持フレーム４２には、該連結支持フレーム４２の長手方向に沿って延在するリニアガイド４４が設置されている。   On the one end face of the casing 18, the tip of an arm 40 of an articulated robot (not shown) is connected above the support portion 38. Further, a connection support frame 42 extending in a vertically upward direction in FIGS. 1 and 2 is fixed so as to face the support portion 38 and the arm 40 with the casing 18 interposed therebetween. The connection support frame 42 is provided with a linear guide 44 extending along the longitudinal direction of the connection support frame 42.

そして、このリニアガイド４４には、ケーシング１８の側周壁に設けられた被案内部４６が摺接自在に係合される。   The linear guide 44 is engaged with a guided portion 46 provided on the side wall of the casing 18 so as to be slidable.

図１及び図２に示すように、摩擦撹拌接合用工具１６は円柱体形状であり、カバー部材２２の下端部にジョイント２４を介して連結されている。すなわち、ジョイント２４の下端面には挿入穴（図示せず）が形成されており、この挿入穴に摩擦撹拌接合用工具１６が嵌合されている。その一方で、ジョイント２４の上端部は、この上端部の形状に対応する形状に開口したカバー部材２２の大径部４８の下端部に嵌合されている。   As shown in FIGS. 1 and 2, the friction stir welding tool 16 has a cylindrical shape and is connected to the lower end of the cover member 22 via a joint 24. That is, an insertion hole (not shown) is formed in the lower end surface of the joint 24, and the friction stir welding tool 16 is fitted in the insertion hole. On the other hand, the upper end portion of the joint 24 is fitted to the lower end portion of the large-diameter portion 48 of the cover member 22 opened to a shape corresponding to the shape of the upper end portion.

このカバー部材２２は、前記大径部４８の他、該大径部４８の上端面から突出形成された小径部５０を有し、該小径部５０は、ボールねじ２０を長手方向に沿って囲繞するように延在する。そして、このカバー部材２２の外周壁を囲繞するように、抜け止め部材５２、モータ支持部材５４、前記第１モータ２６、下キャップ部材５６、変位ユニット５８が下方から直列配置されており、抜け止め部材５２以外は、この抜け止め部材５２によってカバー部材２２から脱落することが阻止されている。   In addition to the large diameter portion 48, the cover member 22 has a small diameter portion 50 that protrudes from the upper end surface of the large diameter portion 48. The small diameter portion 50 surrounds the ball screw 20 along the longitudinal direction. To extend. The retaining member 52, the motor support member 54, the first motor 26, the lower cap member 56, and the displacement unit 58 are arranged in series from below so as to surround the outer peripheral wall of the cover member 22. Other than the member 52, the retaining member 52 prevents the cover member 22 from falling off.

ディスク形状のモータ支持部材５４の上端部には環状段部が設けられており、第１モータ２６の外周壁の下端部は、該環状段部に載置されている。第１モータ２６は、中心部に貫通孔３０が設けられた中空モータであり、この貫通孔３０を囲繞するように配設された電磁石６０と、該電磁石６０に対向する位置に配設された電磁コイル６２とを有する。   An annular step is provided at the upper end of the disk-shaped motor support member 54, and the lower end of the outer peripheral wall of the first motor 26 is placed on the annular step. The first motor 26 is a hollow motor provided with a through hole 30 in the center, and is disposed at a position facing the electromagnet 60 and an electromagnet 60 disposed so as to surround the through hole 30. And an electromagnetic coil 62.

第１モータ２６の上方には、前記下キャップ部材５６が嵌着される。これにより、第１モータ２６がモータ支持部材５４と下キャップ部材５６とで挟持された形態となっている。   The lower cap member 56 is fitted over the first motor 26. Accordingly, the first motor 26 is sandwiched between the motor support member 54 and the lower cap member 56.

変位ユニット５８は、断面略Ｈ字形状の有載置部円筒体６４と、拡径部６６が該有載置部円筒体６４に載置されたナット挟持部材６８を有する。ナット挟持部材６８には、拡径部６６から円筒部７０にかけて貫通孔７１が設けられており、この貫通孔７１にカバー部材２２の小径部５０が挿入されるとともに、上端近傍に、ボールねじ２０に螺合されたナット７２が収容されている。   The displacement unit 58 includes a mounting portion cylindrical body 64 having a substantially H-shaped cross section, and a nut clamping member 68 having a diameter-enlarged portion 66 mounted on the mounting portion cylindrical body 64. The nut clamping member 68 is provided with a through hole 71 from the enlarged diameter portion 66 to the cylindrical portion 70, and the small diameter portion 50 of the cover member 22 is inserted into the through hole 71, and the ball screw 20 is disposed near the upper end. A nut 72 that is screwed together is accommodated.

ケーシング１８の上方開口には、蓋部材７４が嵌着されている。第２モータ２８は、この蓋部材７４の上方に載置固定部材７５を介して設置されている。   A lid member 74 is fitted into the upper opening of the casing 18. The second motor 28 is installed above the lid member 74 via a mounting fixing member 75.

第２モータ２８は、高さ方向の寸法が若干小さいことを除き、第１モータ２６と同様に構成された中空モータである。すなわち、中心部に貫通孔３２が設けられるとともに、この貫通孔３２を囲繞するように電磁石７６が配設され、且つ電磁石７６に対向する位置に電磁コイル７８が配設される。   The second motor 28 is a hollow motor configured similarly to the first motor 26 except that the dimension in the height direction is slightly smaller. That is, the through hole 32 is provided at the center, the electromagnet 76 is disposed so as to surround the through hole 32, and the electromagnetic coil 78 is disposed at a position facing the electromagnet 76.

第２モータ２８の貫通孔３２には、軸止部材８０の大径支持部８２が挿入されるとともに、この大径支持部８２の下端部から中腹部にかけて設けられた挿入口に、前記ナット挟持部材６８の円筒部７０が挿入支持されている。   The large-diameter support portion 82 of the shaft stop member 80 is inserted into the through hole 32 of the second motor 28, and the nut is held in the insertion port provided from the lower end portion of the large-diameter support portion 82 to the middle abdomen. The cylindrical portion 70 of the member 68 is inserted and supported.

結局、本実施の形態では、中空モータである第１モータ２６及び第２モータ２８が直列配置され、且つ第２モータ２８の中心の貫通孔３２に軸止部材８０を介してボールねじ２０が挿入されるとともに、第１モータ２６の中心の貫通孔３０に挿入されたカバー部材２２に摩擦撹拌接合用工具１６が連結される。このため、第１モータ２６及び第２モータ２８の軸線と、ボールねじ２０及び摩擦撹拌接合用工具１６の回転中心とが略一致する。   After all, in the present embodiment, the first motor 26 and the second motor 28 which are hollow motors are arranged in series, and the ball screw 20 is inserted into the through hole 32 at the center of the second motor 28 via the shaft stopper member 80. At the same time, the friction stir welding tool 16 is connected to the cover member 22 inserted into the through hole 30 at the center of the first motor 26. For this reason, the axes of the first motor 26 and the second motor 28 substantially coincide with the rotation centers of the ball screw 20 and the friction stir welding tool 16.

軸止部材８０は、大径支持部８２の上端面から突出した小径軸止部８４を有し、ボールねじ２０の上端部は、該小径軸止部８４に設けられた貫通孔８６に回転自在に軸止されている。   The shaft stop member 80 has a small-diameter shaft stop portion 84 protruding from the upper end surface of the large-diameter support portion 82, and the upper end portion of the ball screw 20 is rotatable in a through-hole 86 provided in the small-diameter shaft stop portion 84. It is fixed to the shaft.

そして、小径軸止部８４は、上キャップ部材８８とヘッドカバー９０によって支持され、ヘッドカバー９０から突出した部位は、保護カバー９２で覆われている。   The small-diameter shaft stopper 84 is supported by the upper cap member 88 and the head cover 90, and a portion protruding from the head cover 90 is covered with a protective cover 92.

以上の構成において、カバー部材２２とモータ支持部材５４、下キャップ部材５６、有載置部円筒体６４との間、軸止部材８０と蓋部材７４、上キャップ部材８８、ヘッドカバー９０との間には、それぞれ、ベアリング９４が介装されている。ベアリング９４としては、摩擦撹拌接合用工具１６にワークからの反力が作用した状態であってもカバー部材２２及び軸止部材８０を円滑に回転動作させるべく、アンギュラベアリングを用いることが好ましい。   In the above configuration, between the cover member 22 and the motor support member 54, the lower cap member 56, and the mounting portion cylindrical body 64, and between the shaft stopper member 80 and the lid member 74, the upper cap member 88, and the head cover 90. Each has a bearing 94 interposed. As the bearing 94, it is preferable to use an angular bearing so that the cover member 22 and the shaft stop member 80 can be smoothly rotated even when the reaction force from the workpiece is applied to the friction stir welding tool 16.

本実施の形態に係る摩擦撹拌接合装置１０は、基本的には以上のように構成されるものであり、次にその作用効果について説明する。   The friction stir welding apparatus 10 according to the present embodiment is basically configured as described above. Next, the function and effect will be described.

先ず、摩擦撹拌接合装置１０においては、上記したように、第１モータ２６及び第２モータ２８が直列配置され、これらの貫通孔３０、３２にボールねじ２０やカバー部材２２が挿入される。このため、摩擦撹拌接合装置１０が小型なものとなる。従って、摩擦撹拌接合装置１０の重量も小さくなり、このため、多関節ロボットに加わる負荷が低減する。   First, in the friction stir welding apparatus 10, as described above, the first motor 26 and the second motor 28 are arranged in series, and the ball screw 20 and the cover member 22 are inserted into the through holes 30 and 32. For this reason, the friction stir welding apparatus 10 becomes small. Therefore, the weight of the friction stir welding apparatus 10 is also reduced, so that the load applied to the articulated robot is reduced.

しかも、この場合、第１モータ２６及び第２モータ２８の軸線と、ボールねじ２０及び摩擦撹拌接合用工具１６の回転中心とが略一致しているので、第１モータ２６の回転作用力を摩擦撹拌接合用工具１６に伝達する部材としてプーリーやベルトを使用する必要がない。従って、装置構成が簡素化する。   In addition, in this case, since the axes of the first motor 26 and the second motor 28 substantially coincide with the rotation centers of the ball screw 20 and the friction stir welding tool 16, the rotational force of the first motor 26 is frictionally applied. There is no need to use a pulley or a belt as a member to be transmitted to the stir welding tool 16. Therefore, the apparatus configuration is simplified.

摩擦撹拌接合を行うに際しては、図３に示すように、多関節ロボットは、第１ワークＷ１と第２ワークＷ２とが積層された積層部Ｌまで摩擦撹拌接合装置１０を移動させ、該積層部Ｌを、受治具１４と摩擦撹拌接合用工具１６との間に配置させる。なお、第１ワークＷ１及び第２ワークＷ２としては、例えば、ＪＩＳ記号の数字が５０００番台であるいわゆる５０００系のアルミニウム合金からなる長尺平板が選定される。   When performing the friction stir welding, as shown in FIG. 3, the articulated robot moves the friction stir welding apparatus 10 to the laminated portion L where the first workpiece W1 and the second workpiece W2 are laminated, and the laminated portion. L is disposed between the receiving jig 14 and the friction stir welding tool 16. In addition, as the 1st workpiece | work W1 and the 2nd workpiece | work W2, the elongate flat plate which consists of what is called 5000 series aluminum alloy whose number of a JIS symbol is 5000 series is selected, for example.

次に、第１モータ２６が付勢される。すなわち、第２モータ２８と同様に電磁コイル６２に通電がなされることにより電磁コイル６２と電磁石６０との間に磁界が発生し、その結果、カバー部材２２が回転動作する。これに追従して、該カバー部材２２に連結されたジョイント２４、ひいては摩擦撹拌接合用工具１６が回転動作する。   Next, the first motor 26 is energized. That is, as with the second motor 28, the electromagnetic coil 62 is energized to generate a magnetic field between the electromagnetic coil 62 and the electromagnet 60. As a result, the cover member 22 rotates. Following this, the joint 24 connected to the cover member 22 and the friction stir welding tool 16 are rotated.

本実施の形態においては、摩擦撹拌接合用工具１６と第１モータ２６との間にプーリーやベルトが存在しない。このため、摩擦撹拌接合用工具１６の第１モータ２６に対する応答速度が速くなるとともに、摩擦撹拌接合用工具１６の回転速度等を制御することが容易となる。   In the present embodiment, there is no pulley or belt between the friction stir welding tool 16 and the first motor 26. For this reason, the response speed of the friction stir welding tool 16 to the first motor 26 is increased, and the rotational speed of the friction stir welding tool 16 is easily controlled.

そして、第２モータ２８の電磁コイル７８に通電がなされ、これにより電磁コイル７８と電磁石７６との間に磁界が発生し、その結果、軸止部材８０とボールねじ２０が回転動作する。   Then, the electromagnetic coil 78 of the second motor 28 is energized, thereby generating a magnetic field between the electromagnetic coil 78 and the electromagnet 76. As a result, the shaft stop member 80 and the ball screw 20 rotate.

上記したように、ボールねじ２０のねじ部にはナット７２が螺合されている。従って、ボールねじ２０が回転動作することに伴ってナット７２のねじ部が送り出され、このため、図４に示すように、ナット７２が下降動作する。   As described above, the nut 72 is screwed into the thread portion of the ball screw 20. Therefore, as the ball screw 20 rotates, the threaded portion of the nut 72 is sent out, and as a result, the nut 72 moves down as shown in FIG.

ナット７２が下降すると、これに追従して、該ナット７２を挟持した変位ユニット５８が下降する。結局、被案内部４６が係合したリニアガイド４４に案内されながら、ケーシング１８、ひいては、カバー部材２２の先端にジョイント２４を介して連結された摩擦撹拌接合用工具１６が下降し、図３に示すように、受治具１４上に載置された積層部Ｌに対して接近する。   When the nut 72 is lowered, the displacement unit 58 holding the nut 72 is lowered following this. Eventually, while being guided by the linear guide 44 with which the guided portion 46 is engaged, the friction stir welding tool 16 connected via the joint 24 to the casing 18 and eventually the tip of the cover member 22 descends, as shown in FIG. As shown, it approaches the stacked portion L placed on the receiving jig 14.

最終的に、回転動作する摩擦撹拌接合用工具１６が、受治具１４に支持された積層部Ｌの上端面に摺接することにより、該積層部Ｌに摩擦熱が発生する。その結果、積層部Ｌの当接箇所及びその近傍が軟化し、摩擦撹拌接合用工具１６が積層部Ｌに埋没する。   Finally, the friction stir welding tool 16 that rotates is brought into sliding contact with the upper end surface of the laminated portion L supported by the receiving jig 14, whereby frictional heat is generated in the laminated portion L. As a result, the contact location of the laminated portion L and the vicinity thereof are softened, and the friction stir welding tool 16 is buried in the laminated portion L.

軟化した積層部Ｌの肉は、摩擦撹拌接合用工具１６によって摩擦撹拌（塑性流動）される。所定時間が経過した後、第２モータ２８を、ボールねじ２０が上記とは逆方向に回転動作するように付勢する。これによりナット７２、ひいては変位ユニット５８が上昇動作することに追従して、摩擦撹拌接合用工具１６が積層部Ｌから離脱する。勿論、この際においても、ケーシング１８の被案内部４６がリニアガイド４４に案内される。   The softened laminating portion L is subjected to friction stirring (plastic flow) by the friction stir welding tool 16. After a predetermined time has elapsed, the second motor 28 is urged so that the ball screw 20 rotates in the direction opposite to the above. As a result, the friction stir welding tool 16 is detached from the laminated portion L following the upward movement of the nut 72 and consequently the displacement unit 58. Of course, also in this case, the guided portion 46 of the casing 18 is guided by the linear guide 44.

この離脱に伴って積層部Ｌの肉の塑性流動が停止し、さらに、該肉が冷却固化され、第１ワークＷ１と第２ワークＷ２とが一体的に固相接合されるに至る。   With this separation, the plastic flow of the meat in the laminated portion L stops, and the meat is cooled and solidified, and the first work W1 and the second work W2 are integrally solid-phase joined.

摩擦撹拌接合用工具１６が積層部Ｌから離脱した後は、第１モータ２６を滅勢して摩擦撹拌接合用工具１６の回転動作を停止すればよい。   After the friction stir welding tool 16 is detached from the laminated portion L, the first motor 26 may be deactivated to stop the rotation operation of the friction stir welding tool 16.

なお、上記した実施の形態においては、２個のワークＷ１、Ｗ２を積層して摩擦撹拌接合する場合を例示して説明したが、積層されるワークの個数は２個に限定されるものではなく、３個以上のワークを積層するようにしてもよい。   In the above-described embodiment, the case where two workpieces W1 and W2 are stacked and friction stir welding is illustrated and described, but the number of stacked workpieces is not limited to two. Three or more workpieces may be stacked.

本実施の形態に係る摩擦撹拌接合装置の一部縦断面全体側面図である。It is a partial longitudinal cross-section whole side view of the friction stir welding apparatus which concerns on this Embodiment. 図１の摩擦撹拌接合装置の要部拡大概略縦断面図である。It is a principal part expansion schematic longitudinal cross-sectional view of the friction stir welding apparatus of FIG. 図１の摩擦撹拌接合装置が閉じて積層部が挟持された状態を示す一部縦断面全体側面図である。It is a partial longitudinal cross-section whole side view which shows the state which the friction stir welding apparatus of FIG. 1 closed and the laminated part was clamped. 図３の状態の摩擦撹拌接合装置の要部拡大概略縦断面図である。It is a principal part expansion schematic longitudinal cross-sectional view of the friction stir welding apparatus of the state of FIG.

符号の説明Explanation of symbols

１０…摩擦撹拌接合装置 １２…アーム部材
１４…受治具 １６…摩擦撹拌接合用工具
１８…ケーシング ２０…ボールねじ
２２…カバー部材 ２４…ジョイント
２６、２８…モータ ４４…リニアガイド
４６…被案内部 ５８…変位ユニット
６０、７６…電磁石 ６２、７８…電磁コイル
６８…ナット挟持部材 ７２…ナット
８０…軸止部材 Ｌ…積層部
Ｗ１、Ｗ２…ワーク DESCRIPTION OF SYMBOLS 10 ... Friction stir welding apparatus 12 ... Arm member 14 ... Receiving jig 16 ... Friction stir welding tool 18 ... Casing 20 ... Ball screw 22 ... Cover member 24 ... Joint 26, 28 ... Motor 44 ... Linear guide 46 ... Guided part 58 ... Displacement unit 60, 76 ... Electromagnet 62, 78 ... Electromagnetic coil 68 ... Nut clamping member 72 ... Nut 80 ... Shaft stop member L ... Laminated portion W1, W2 ... Workpiece

Claims (3)

複数個の部材が積層されることによって形成された積層部を摩擦撹拌接合するための摩擦撹拌接合装置であって、
アーム部材に互いに対向して配設された受治具及び摩擦撹拌接合用工具と、
前記受治具に載置された前記積層部に対して前記摩擦撹拌接合用工具を接近又は離間する方向に変位させる変位手段と、
前記摩擦撹拌接合用工具を回転動作させる第１回転付勢手段と、
前記変位手段を回転動作させる第２回転付勢手段と、
を有し、
前記第１回転付勢手段と前記第２回転付勢手段とが略同一軸線上に配置され、
前記変位手段と前記摩擦撹拌接合用工具の回転中心が、前記第１回転付勢手段と前記第２回転付勢手段の軸線と略一致していることを特徴とする摩擦撹拌接合装置。 A friction stir welding apparatus for friction stir welding a laminated portion formed by laminating a plurality of members,
A receiving jig and a friction stir welding tool disposed opposite to each other on the arm member;
Displacement means for displacing the friction stir welding tool toward or away from the laminated portion placed on the receiving jig;
First rotation urging means for rotating the friction stir welding tool;
Second rotation urging means for rotating the displacement means;
Have
The first rotation urging means and the second rotation urging means are arranged on substantially the same axis,
The friction stir welding apparatus according to claim 1, wherein rotation centers of the displacement means and the friction stir welding tool substantially coincide with axes of the first rotation biasing means and the second rotation biasing means. 請求項１記載の装置において、前記第１回転付勢手段及び前記第２回転付勢手段が中空モータであることを特徴とする摩擦撹拌接合装置。   2. The friction stir welding apparatus according to claim 1, wherein the first rotation biasing means and the second rotation biasing means are hollow motors. 請求項１又は２記載の装置において、前記アーム部材の形状が略Ｃ字状であることを特徴とする摩擦撹拌接合装置。   3. The friction stir welding apparatus according to claim 1, wherein the arm member has a substantially C shape.
JP2005142397A 2005-05-16 2005-05-16 Friction stir welding equipment Expired - Fee Related JP4538371B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007067659A2 (en) * 2005-12-06 2007-06-14 Tol-O-Matic, Inc. Rotatable tool and apparatus therefor

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