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JP4291104B2 - Friction stir welding joint structure - Google Patents

Friction stir welding joint structure Download PDF

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Publication number
JP4291104B2
JP4291104B2 JP2003357266A JP2003357266A JP4291104B2 JP 4291104 B2 JP4291104 B2 JP 4291104B2 JP 2003357266 A JP2003357266 A JP 2003357266A JP 2003357266 A JP2003357266 A JP 2003357266A JP 4291104 B2 JP4291104 B2 JP 4291104B2
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Prior art keywords
friction stir
stir welding
joint structure
protrusion
joint
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JP2005118829A (en
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英之 中村
一成 福寄
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Hitachi Ltd
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Hitachi Ltd
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Priority to JP2003357266A priority Critical patent/JP4291104B2/en
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to KR1020040082457A priority patent/KR100643254B1/en
Priority to US10/964,692 priority patent/US20050115456A1/en
Priority to DE602004028087T priority patent/DE602004028087D1/en
Priority to CNB2004100903404A priority patent/CN1317153C/en
Priority to AT04256366T priority patent/ATE473831T1/en
Priority to EP04256366A priority patent/EP1524064B1/en
Publication of JP2005118829A publication Critical patent/JP2005118829A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance

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Description

本発明は、摩擦攪拌接合に係り、特に鉄道車両の構体に適した摩擦攪拌接合用継手構造に関する。   The present invention relates to friction stir welding, and more particularly to a joint structure for friction stir welding suitable for a railway vehicle structure.

摩擦攪拌接合を利用して、鉄道車両用の構体を製造する技術は、例えば、下記の特許文献１に記載されている。
図４は、従来の摩擦攪拌接合用継手構造を示す説明図である。
摩擦攪拌接合される２つの部材１０，２０は、その端面が突合わされて、継手部の接合面３０を形成する。 A technique for manufacturing a structure for a railway vehicle using friction stir welding is described in Patent Document 1 below, for example.
FIG. 4 is an explanatory view showing a conventional joint structure for friction stir welding.
The two members 10 and 20 to be friction stir welded face each other to form a joint surface 30 of the joint portion.

第１の部材１０は、摩擦攪拌接合用の工具５０が挿入される側に部材１０の上面から突出する突部１２を有する。
突部１２の上面１４は平坦面に形成され、突部１２の側面１３は、部材１０の上面１１に対して小さな円弧Ｒ１で結ばれている。 The first member 10 has a protrusion 12 protruding from the upper surface of the member 10 on the side where the friction stir welding tool 50 is inserted.
The upper surface 14 of the protrusion 12 is formed as a flat surface, and the side surface 13 of the protrusion 12 is connected to the upper surface 11 of the member 10 by a small arc R 1 .

同様に、第２の部材２０も、上面２１から突出する突部２２を有する。突部２２の上面２４は平坦面に形成され、突部２２の側面２３は、部材２０の上面２１に対して小さな円弧Ｒ１を有する連結部で結ばれている。 Similarly, the second member 20 also has a protrusion 22 protruding from the upper surface 21. The upper surface 24 of the protrusion 22 is formed as a flat surface, and the side surface 23 of the protrusion 22 is connected to the upper surface 21 of the member 20 by a connecting portion having a small arc R 1 .

摩擦攪拌接合用工具５０は、先端に小径部５２を有し、小径部５２の中心を接合面３０に合わせて摩擦攪拌接合する（ｂ）。
接合された部材１０，２０の継手部は、上面が平坦面４０を形成し、その両端部にバリＢ１が残される。このバリＢ１を切削して除去し、継手部が完成する（ｃ）。 The friction stir welding tool 50 has a small diameter portion 52 at the tip, and friction stir welding is performed with the center of the small diameter portion 52 aligned with the joining surface 30 (b).
Joint of the joined members 10 and 20, the upper surface forms a flat surface 40, the burr B 1 is left in its ends. The burr B 1 is cut to remove the joint portion is completed (c).

この継手部の上面４２は、接合された２つの部材１０，２０の上面１１，２１よりも突出し、段付部を形成する。
この段付部は、ノッチ４１を形成する。
特開平１１−３１４１７３号公報 The upper surface 42 of the joint portion protrudes from the upper surfaces 11 and 21 of the two joined members 10 and 20 to form a stepped portion.
This stepped portion forms a notch 41.
JP 11-314173 A

この継手部に残存する突起のノッチ４１は、部材１０，２０に曲げ応力等が加えられたときに、応力集中が発生する。この応力集中を避けるためには、継手部の上面４２を部材１０，２０の上面１１，２１と一体の平面を形成する必要がある。
この加工には、工数を要する等の問題がある。
本発明の目的は、上述した問題を解決する摩擦攪拌接合用継手構造を提供するものである。 In the notch 41 of the protrusion remaining in the joint portion, stress concentration occurs when bending stress or the like is applied to the members 10 and 20. In order to avoid this stress concentration, it is necessary to form an upper surface 42 of the joint portion and a flat surface integral with the upper surfaces 11 and 21 of the members 10 and 20.
This processing has problems such as requiring man-hours.
An object of the present invention is to provide a joint structure for friction stir welding that solves the above-described problems.

上記目的を達成するために、本発明の摩擦攪拌接合用継手構造は、基本的な手段として、突き合わせ面となる端面と、部材の上面から摩擦攪拌接合用工具が挿入される側に突出する端面とは反対側の側面に形成される連結部を有する突部を備え、該連結部は半径の中心位置が部材の外側にあって、部材の上面に接続される大きな半径寸法を有する第１の円弧と、第１の円弧と突部の側面に接続される小さな半径寸法を有する第２の円弧で形成されるものである。 To achieve the above object, a friction stir welding joint structure of the present invention, an end face which protrudes as a basic unit, and an end face of the abutting surface, the side where the friction stir welding tool is inserted from the upper surface of the member And a first projection having a large radial dimension connected to the upper surface of the member. It is formed by an arc and a second arc having a small radial dimension connected to the first arc and the side surface of the protrusion .

本発明の摩擦攪拌接合用継手構造は、以上の構成を備えるので、摩擦攪拌接合時に発生するバリを切削した接合面と部材の上面との間の段差が大きな曲率をもつ円弧で結ばれる。したがって、段差に対する応力の集中は回避できる。   Since the joint structure for friction stir welding according to the present invention has the above-described configuration, the step between the joint surface obtained by cutting burrs generated during friction stir welding and the upper surface of the member is connected by an arc having a large curvature. Therefore, concentration of stress on the step can be avoided.

以下、本発明の実施例を説明する。   Examples of the present invention will be described below.

図１は、本発明の実施例１を示す説明図である。
摩擦攪拌接合される２つの部材１００，１２０は、その端面が突合わされて継手部の接合面１４０を形成する。 FIG. 1 is an explanatory view showing Embodiment 1 of the present invention.
The end faces of the two members 100 and 120 to be friction stir welded are abutted to form a joint surface 140 of the joint portion.

第１の部材１００は、摩擦攪拌接合用の工具５０が挿入される側に部材１００の上面から突出する突部１１０を有する。
突部１１０の上面１１４は平坦面に形成され、突部１１０の側面１１２は、部材１００の上面１０２に対して、第１の円弧Ｒ２と第２の円弧Ｒ３を有する連結部で結ばれている。第１の円弧Ｒ２は小さな曲率を有し、第２の円弧Ｒ３は大きな曲率を有する。 The first member 100 has a protrusion 110 protruding from the upper surface of the member 100 on the side where the friction stir welding tool 50 is inserted.
The upper surface 114 of the protrusion 110 is formed as a flat surface, and the side surface 112 of the protrusion 110 is connected to the upper surface 102 of the member 100 by a connecting portion having a first arc R 2 and a second arc R 3. ing. The first arc R 2 has a small curvature, and the second arc R 3 has a large curvature.

同様に、第２の部材１２０は、摩擦攪拌接合用の工具５０が挿入される側に部材１２０の上面から突出する突部１３０を有する。
突部１３０の上面１３４は平坦面に形成され、突部１３０の側面１３２は、部材１２０の上面１２２に対して、第１の円弧Ｒ２と第２の円弧Ｒ３を有する連結部で結ばれている。第１の円弧Ｒ２は小さな曲率を有し、第２の円弧Ｒ３は大きな曲率を有する。 Similarly, the 2nd member 120 has the protrusion 130 which protrudes from the upper surface of the member 120 in the side in which the tool 50 for friction stir welding is inserted.
The upper surface 134 of the protrusion 130 is formed as a flat surface, and the side surface 132 of the protrusion 130 is connected to the upper surface 122 of the member 120 by a connecting portion having a first arc R 2 and a second arc R 3. ing. The first arc R 2 has a small curvature, and the second arc R 3 has a large curvature.

摩擦攪拌用工具５０は、先端部に小径部５２を有し、小径部５２の中心を接合面１４０に合わせて摩擦攪拌接合する（ｂ）。
接合された部材１００，１２０の継手部は、上面が平坦面１５０を形成し、その両端部にバリＢ１が残される。このバリＢ１を切削して除去し、継手部が完成する（ｃ）。 The friction stir tool 50 has a small-diameter portion 52 at the tip, and friction stir welding is performed with the center of the small-diameter portion 52 aligned with the joining surface 140 (b).
Joint of the joined members 100, 120, the upper surface forms a flat surface 150, the burr B 1 is left in its ends. The burr B 1 is cut to remove the joint portion is completed (c).

この継手部の上面１５２は、接合された２つの部材１００，１２０の上面１０２，１２２よりも突出するが、その連結部は大きな曲率をもつ円弧Ｒ３で結ばれ、応力集中は発生しない。 Upper surface 152 of the joint portion is projected from the upper surface 102 and 122 of the two members 100 and 120 which are joined, the connecting portion is connected by an arc R 3 having a large curvature, stress concentration does not occur.

図２は、本発明の実施例２を示す説明図である。
摩擦攪拌接合される２つの部材２００，２２０は、その端面が突合わされて継手部の接合面２４０を形成する。 FIG. 2 is an explanatory view showing Embodiment 2 of the present invention.
The end faces of the two members 200 and 220 to be friction stir welded face each other to form a joint surface 240 of the joint portion.

第１の部材２００は、摩擦攪拌接合用の工具５０が挿入される側に部材２００の上面から突出する突部２１０を有する。
突部２１０の上面２１４は平坦面に形成され、突部２１０の側面２１２は、部材２００の上面２０２に対して、楕円の一部Ｄ１を有する連結部で結ばれている。 The first member 200 has a protrusion 210 protruding from the upper surface of the member 200 on the side where the friction stir welding tool 50 is inserted.
Upper surface 214 of the protrusion 210 is formed on the flat surface, the side surface 212 of the protrusion 210, the upper surface 202 of member 200, are connected by connecting portions having a portion D 1 of the ellipse.

同様に、第２の部材２２０は、摩擦攪拌接合用の工具５０が挿入される側に部材２２０の上面から突出する突部２３０を有する。
突部２３０の上面２３４は平坦面に形成され、突部２３０の側面２３２は、部材２２０の上面２２２に対して、楕円の一部Ｄ１を有する連結部で結ばれている。 Similarly, the 2nd member 220 has the protrusion 230 which protrudes from the upper surface of the member 220 in the side in which the tool 50 for friction stir welding is inserted.
Upper surface 234 of the protrusion 230 is formed on the flat surface, the side surface 232 of the protrusion 230, the upper surface 222 of member 220, are connected by connecting portions having a portion D 1 of the ellipse.

摩擦攪拌用工具５０は、先端部に小径部５２を有し、小径部５２の中心を接合面１４０に合わせて摩擦攪拌接合する（ｂ）。
接合された部材２００，２２０の継手部は、上面が平坦面２５０を形成し、その両端部にバリＢ１が残される。このバリＢ１を切削して除去し、継手部が完成する（ｃ）。 The friction stir tool 50 has a small-diameter portion 52 at the tip, and friction stir welding is performed with the center of the small-diameter portion 52 aligned with the joining surface 140 (b).
Joint of the joined member 200, 220 has an upper surface forms a flat surface 250, the burr B 1 is left in its ends. The burr B 1 is cut to remove the joint portion is completed (c).

この継手部の上面１５２は、接合された２つの部材２００，２２０の上面２０２，２２２よりも突出するが、その連結部は大きな曲率をもつ楕円Ｄ１を有する連結部で結ばれ、応力集中は発生しない。 Upper surface 152 of the joint portion is projected from the upper surface 202, 222 of the two members 200, 220 joined, the connecting portion is connected by a connecting portion having an elliptical D 1 having a large curvature, stress concentration Does not occur.

図３−１，３−２は、本発明の実施例３を示す。
本実施例は、車両の側構体をアルミ合金の中空押出形材で製作する例を示す。
継手部を構成する第１の部材４００は中空形材であって、平行する２枚の平板４１０，４２０がトラス４６０で連結された構造を有する。 3A and 3B show the third embodiment of the present invention.
The present embodiment shows an example in which a side structure of a vehicle is manufactured with a hollow extruded shape of an aluminum alloy.
The first member 400 constituting the joint portion is a hollow material, and has a structure in which two parallel flat plates 410 and 420 are connected by a truss 460.

第２の部材５００も中空形材であって、平行する２枚の平板５１０，５２０がトラス５６０で連結された構造を有する。   The second member 500 is also a hollow shape and has a structure in which two parallel flat plates 510 and 520 are connected by a truss 560.

第１の部材４００の第１の平板４１０は、車両の車内側Ｓ１に配設され、突部４３０を有する。この突部４３０と第１の平板４１０の連結部は、実施例１で説明した小さな曲率を有する円弧Ｒ２と、大きな曲率を有する円弧Ｒ３で結ばれる。 The first flat plate 410 of the first member 400 is disposed on the vehicle interior side S 1 of the vehicle and has a protrusion 430. The connecting portion between the protrusion 430 and the first flat plate 410 is connected by the arc R 2 having a small curvature described in the first embodiment and the arc R 3 having a large curvature.

同様に第２の部材５００の第１の平板５１０は、車両の車内側Ｓ１に配設され、突部５３０を有する。この突部５３０と第１の平板５１０の連結部は、実施例１で説明した小さな曲率を有する円弧Ｒ２と大きな曲率を有する円弧Ｒ３で結ばれる。 First flat plate 510 of the second member 500 similarly is disposed in the interior side S 1 of a vehicle, having a projection 530. The connecting portion between the protrusion 530 and the first flat plate 510 is connected by the arc R 2 having a small curvature and the arc R 3 having a large curvature described in the first embodiment.

第１の中空部材４００の第２の平板４２０は、車両の車外側Ｓ２に配設され、突部４４０を有する。突部４４０と平板４２０は、コーナー部Ｃ１で結ばれる。 The second flat plate 420 of the first hollow member 400 is disposed on the vehicle exterior side S < b > 2 of the vehicle and has a protrusion 440. Projection 440 and the flat plate 420 are connected by the corner portion C 1.

第２の中空部材５００の第２の平板５２０も、車両の車外側Ｓ２に配設され、突部５４０を有する。突部５４０と平板５２０は、コーナー部Ｃ２で結ばれる。 The second flat plate 520 of the second hollow member 500 is also disposed on the vehicle exterior side S < b > 2 of the vehicle and has a protrusion 540. Projection 540 and the flat plate 520 are connected by the corner portion C 2.

第１の中空部材４００と第２の中空部材５００の端部は、テーパー面Ｔ１，Ｔ２で嵌合される。
そこで、第１の中空部材４００と第２の中空部材５００の突合わせ部には、間隙Ｇ１，Ｇ２が形成される。 End portions of the first hollow member 400 and the second hollow member 500 are fitted with tapered surfaces T 1 and T 2 .
Therefore, gaps G 1 and G 2 are formed at the abutting portion between the first hollow member 400 and the second hollow member 500.

摩擦攪拌接合は、摩擦攪拌接合用工具５０の小径部５２の中心を、大略この間隙Ｇ１，Ｇ２の中央に合わせて行われる。
この際に、摩擦攪拌接合用工具が発生する押圧力は、主として、第２の中空形材の剛性の高いトラス５６０で受けられる。 Friction stir welding is performed with the center of the small diameter portion 52 of the friction stir welding tool 50 approximately aligned with the centers of the gaps G 1 and G 2 .
At this time, the pressing force generated by the friction stir welding tool is mainly received by the truss 560 having high rigidity of the second hollow member.

図の（ｂ）は、室内側Ｓ１の継手面６００と室外側Ｓ２の継手面６５０が摩擦攪拌接合された状態を示す。
両継手面６００，６５０の両側部には、バリＢ１が残される。 (B) in the figure shows a state where the joint surface 650 of the joint surface 600 of the interior side S 1 outdoor side S 2 is friction stir welding.
On both sides of both joint surfaces 600, 650, burr B 1 it is left.

図の（ｃ）は、室内側Ｓ１の継手面６００に加工を施してバリを除去し、継手面６１０を完成した状態を示す。
この継手面６１０は、第１の中空形材の平板４１０と第２の中空形材の平板５１０から突出した面を形成するが、この連結部は大きな曲率を有する円弧Ｒ３で結ばれ、応力集中は発生しない。車内側Ｓ１の側構体には、内装が施されるので、継手面６１０を突出された状態でも不都合はない。 (C) in FIG removes burrs giving the process the joint surface 600 of the interior side S 1, showing a state in which to complete a joint surface 610.
The joint surface 610 is formed a first flat plate 410 of the hollow profile surface which protrudes from the second flat plate 510 of the hollow shape member, the connecting portion is connected by an arc R 3 having a large curvature, stress Concentration does not occur. The side structure of the vehicle interior side S 1, since the interior is subjected, not inconvenience in the state of being protruded joint surface 610.

図の（ｄ）は、車外側Ｓ２の継手面６６０を加工して、第１の中空形材の平板４２０と第２の中空形材の平板５２０と同一面を形成する継手面６７０を完成した状態を示す。
車外側Ｓ２は、同一平面を形成するので、応力集中は発生せず、また、美観の高い側構体を得ることができる。
なお、車内側Ｓ１の継手面の突部に実施例２で説明した楕円形状を適用することも当然に可能である。 (D) in the figure, by processing the joint surface 660 of the exterior S 2, completing the joint surface 670 to form a flat plate 420 of the first hollow profile and flush with the flat plate 520 of the second hollow profile Shows the state.
Exterior side S 2, so to form the same plane, stress concentration does not occur, also, it is possible to obtain a highly aesthetic side structure.
Incidentally, it is of course possible to apply the elliptical described protrusion of the joint surface of the interior side S 1 in Example 2.

本発明の実施例１の説明図。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 本発明の実施例２の説明図。Explanatory drawing of Example 2 of this invention. 本発明の実施例３の説明図。Explanatory drawing of Example 3 of this invention. 本発明の実施例３の説明図。Explanatory drawing of Example 3 of this invention. 従来の継手構造の説明図。Explanatory drawing of the conventional joint structure.

符号の説明Explanation of symbols

５０ 摩擦攪拌接合用工具
５２ 摩擦攪拌接合用工具の小径部
１００ 第１の部材
１０２ 第１の部材の上面
１１０ 第１の部材の突部
１２０ 第２の部材
１２２ 第２の部材の上面
１３０ 第２の部材の突部
１４０ 接合面
１５０ 接合された平坦面
１５２ バリを切削した平坦面 DESCRIPTION OF SYMBOLS 50 Friction stir welding tool 52 Small diameter part of friction stir welding tool 100 1st member 102 Upper surface of 1st member 110 Projection part of 1st member 120 2nd member 122 Upper surface of 2nd member 130 2nd Projecting part of the member 140 Joining surface 150 Joined flat surface 152 Flat surface obtained by cutting burrs

Claims (5)

部材を摩擦攪拌接合するために部材の端部に設けられる摩擦攪拌接合用継手構造であって、
突き合わせ面となる端面と、部材の上面から摩擦攪拌接合用工具が挿入される側に突出する端面とは反対側の側面に形成される連結部を有する突部を備え、
該連結部は半径の中心位置が部材の外側にあって、部材の上面に接続される大きな半径寸法を有する第１の円弧と、第１の円弧と突部の側面に接続される小さな半径寸法を有する第２の円弧で形成される摩擦攪拌接合用継手構造。 A friction stir welding joint structure provided at an end of a member for friction stir welding of the member,
An end surface serving as a butting surface, and a protrusion having a connecting portion formed on the side surface opposite to the end surface protruding from the upper surface of the member to the side where the friction stir welding tool is inserted,
The connecting portion has a first circular arc having a large radial dimension that is connected to the upper surface of the member, and a small radial dimension that is connected to the first circular arc and the side surface of the protrusion. A joint structure for friction stir welding formed by a second arc having: 部材を摩擦攪拌接合するために部材の端部に設けられる摩擦攪拌接合用継手構造であって、
突き合わせ面となる端面と、部材の上面から摩擦攪拌接合用工具が挿入される側に突出する端面とは反対側の側面に形成される連結部を有する突部を備え、
該連結部は中心が部材の外側にあって、長軸を前記部材の上面にほぼ平行に配置された楕円で形成され、前記部材側が凹となる前記楕円の長軸と短軸で区切られる略４分の１の楕円弧で構成される摩擦攪拌接合用継手構造。 A friction stir welding joint structure provided at an end of a member for friction stir welding of the member,
An end surface serving as a butting surface, and a protrusion having a connecting portion formed on the side surface opposite to the end surface protruding from the upper surface of the member to the side where the friction stir welding tool is inserted,
The connecting portion is formed by an ellipse whose center is outside the member and whose major axis is arranged substantially parallel to the upper surface of the member, and is delimited by the major axis and the minor axis of the ellipse where the member side is concave. friction stir welding joint structure substantially Ru consists of 1 elliptical arc quarters. 部材は平板である請求項１又は２記載の摩擦攪拌接合用継手構造。   The joint structure for friction stir welding according to claim 1 or 2, wherein the member is a flat plate. 部材は２枚の平板がトラスで連結された構造を有する中空形材である請求項１または２記載の摩擦攪拌接合用継手構造。   The joint structure for friction stir welding according to claim 1 or 2, wherein the member is a hollow member having a structure in which two flat plates are connected by a truss. 部材は、２枚の平板がトラスで連結された構造を有する車両の構造体の中空形材であって、少なくとも車両の車内側の摩擦攪拌接合用継手構造は、請求項１又は２記載の連結部を備える摩擦攪拌接合用継手構造。   The member is a hollow member of a vehicle structure having a structure in which two flat plates are connected by a truss, and at least the joint structure for friction stir welding inside the vehicle is connected according to claim 1 or 2. A joint structure for friction stir welding comprising a portion.
JP2003357266A 2003-10-17 2003-10-17 Friction stir welding joint structure Expired - Lifetime JP4291104B2 (en)

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Application Number Priority Date Filing Date Title
JP2003357266A JP4291104B2 (en) 2003-10-17 2003-10-17 Friction stir welding joint structure
US10/964,692 US20050115456A1 (en) 2003-10-17 2004-10-15 Structural body of railway car and joint structure for friction stir welding
DE602004028087T DE602004028087D1 (en) 2003-10-17 2004-10-15 Car body structure of a rail vehicle and connection structure for friction welding
CNB2004100903404A CN1317153C (en) 2003-10-17 2004-10-15 Structural body of railway car and joint structure for friction stir welding
KR1020040082457A KR100643254B1 (en) 2003-10-17 2004-10-15 Railway vehicle body structure and joint structure for friction stir welding
AT04256366T ATE473831T1 (en) 2003-10-17 2004-10-15 CAR BODY STRUCTURE OF A RAIL VEHICLE AND CONNECTION STRUCTURE FOR FRICTION WELDING
EP04256366A EP1524064B1 (en) 2003-10-17 2004-10-15 Structural body of railway car and joint structure for friction stir welding

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JP4610907B2 (en) * 2004-02-23 2011-01-12 株式会社日立製作所 Railway vehicle structure
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