JP2016078081A - Friction stir welding method - Google Patents

Friction stir welding method Download PDF

Info

Publication number
JP2016078081A
JP2016078081A JP2014212247A JP2014212247A JP2016078081A JP 2016078081 A JP2016078081 A JP 2016078081A JP 2014212247 A JP2014212247 A JP 2014212247A JP 2014212247 A JP2014212247 A JP 2014212247A JP 2016078081 A JP2016078081 A JP 2016078081A
Authority
JP
Japan
Prior art keywords
auxiliary member
cylindrical metal
shaped auxiliary
frame
friction stir
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2014212247A
Other languages
Japanese (ja)
Other versions
JP6287751B2 (en
Inventor
伸城 瀬尾
Nobushiro Seo
伸城 瀬尾
堀 久司
Hisashi Hori
久司 堀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Light Metal Co Ltd
Original Assignee
Nippon Light Metal Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Light Metal Co Ltd filed Critical Nippon Light Metal Co Ltd
Priority to JP2014212247A priority Critical patent/JP6287751B2/en
Publication of JP2016078081A publication Critical patent/JP2016078081A/en
Application granted granted Critical
Publication of JP6287751B2 publication Critical patent/JP6287751B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a friction stir welding method capable of preventing outflow of a metal member to the inside or outside of cylindrical metal members and capable of preventing shortage of metal by friction stir.SOLUTION: A friction stir welding method for welding cylindrical metal members 1, 1 by using a rotary tool F for main welding, that is equipped with a stir pin F2 includes: an abutment step of abutting end faces of the cylindrical metal members 1, 1 each other and arranging an outer frame-like auxiliary member 11 around the outer periphery of an abutted part J1 to cover the abutted part J1; and an outer main welding step of inserting the rotating stir pin F2 from the outer peripheral surface 11a of the outer frame-like auxiliary member 11 and frictionally stirring the abutted part J1 in a state of contacting only the stir pin F2 with the outer frame-like auxiliary member 11 and the cylindrical metal members 1, 1.SELECTED DRAWING: Figure 5

Description

本発明は、摩擦攪拌によって一対の筒状金属部材を接合する摩擦攪拌接合方法に関する。   The present invention relates to a friction stir welding method for joining a pair of cylindrical metal members by friction stirring.

一対の金属部材同士を接合する方法として、摩擦攪拌接合(FSW=Friction Stir Welding)が知られている。摩擦攪拌接合は、回転ツールを金属部材同士の突合せ部に沿って移動させ、回転ツールと金属部材との摩擦熱により突合せ部の金属を塑性流動させることで、金属部材同士を固相接合するものである。   Friction stir welding (FSW = Friction Stir Welding) is known as a method for joining a pair of metal members. Friction stir welding is a method of solid-phase joining metal members by moving the rotary tool along the abutting part between metal members and plastically flowing the metal at the abutting part by frictional heat between the rotating tool and the metal member. It is.

特許文献1には、二つの筒状金属部材を摩擦攪拌で接合する摩擦攪拌接合方法が開示されている。当該摩擦攪拌接合では、筒状金属部材の端面同士を突き合わせて突合せ部を形成した後、当該突合せ部に沿って回転ツールを相対移動させている。   Patent Document 1 discloses a friction stir welding method in which two cylindrical metal members are joined by friction stirring. In the friction stir welding, the end surfaces of the cylindrical metal members are butted together to form a butted portion, and then the rotary tool is relatively moved along the butted portion.

特許第4774251号公報Japanese Patent No. 4774251

従来の摩擦攪拌接合方法では、回転ツールを突合せ部に押し込むと、回転ツールのショルダ部の下端面で筒状金属部材を押圧するため、筒状金属部材に大きな圧力が作用する。これにより、回転ツールの押圧力を筒状金属部材が支えられなくなり、回転ツールの攪拌ピンがより深く差し込まれて筒状金属部材の内側に塑性流動化した金属材料が流出するおそれがある。   In the conventional friction stir welding method, when the rotary tool is pushed into the abutting portion, the cylindrical metal member is pressed by the lower end surface of the shoulder portion of the rotary tool, so that a large pressure acts on the cylindrical metal member. As a result, the cylindrical metal member cannot support the pressing force of the rotating tool, and the stirring pin of the rotating tool may be inserted deeper and the plastic material that is plastically fluidized may flow out of the cylindrical metal member.

かかる問題を解消する方法として、筒状金属部材とショルダ部とを離間させた状態で摩擦攪拌を行うことが考えられるが、この方法によると塑性流動化した金属が外部に溢れやすくなり金属不足になる可能性がある。   As a method for solving such a problem, it is conceivable to perform friction stir in a state where the cylindrical metal member and the shoulder portion are separated from each other. However, according to this method, the plastic fluidized metal easily overflows to the outside and the metal is insufficient. There is a possibility.

そこで、本発明は、筒状金属部材の内側又は外側への金属部材の流出を防ぐことができるとともに、摩擦攪拌による金属不足を防ぐことができる摩擦攪拌接合方法を提供することを課題とする。   Then, this invention makes it a subject to provide the friction stir welding method which can prevent the metal member flowing out to the inner side or the outer side of a cylindrical metal member, and can prevent the metal shortage by friction stirring.

前記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二つの筒状金属部材を接合する摩擦攪拌接合方法であって、前記筒状金属部材の端面同士を突き合わせるとともに、突合せ部の外周に枠状補助部材を配置して前記突合せ部を覆う突合せ工程と、前記枠状補助部材の外周面から回転した前記攪拌ピンを挿入し、前記枠状補助部材及び前記両筒状金属部材、又は、前記枠状補助部材のみに前記攪拌ピンのみを接触させた状態で前記突合せ部を摩擦攪拌する外側本接合工程と、を含むことを特徴とする。   In order to solve the above-mentioned problem, the present invention is a friction stir welding method for joining two cylindrical metal members using a rotary tool provided with a stirring pin, and the end surfaces of the cylindrical metal members are abutted against each other. In addition, a frame-shaped auxiliary member is disposed on the outer periphery of the butted portion to cover the butted portion, the stirring pin rotated from the outer peripheral surface of the frame-shaped auxiliary member is inserted, and the frame-shaped auxiliary member and the both And an outer main joining step in which the butted portion is frictionally stirred in a state where only the stirring pin is brought into contact with only the cylindrical metal member or the frame-shaped auxiliary member.

また、本発明は、攪拌ピンを備えた回転ツールを用いて二つの筒状金属部材を接合する摩擦攪拌接合方法であって、前記筒状金属部材の端面同士を突き合わせるとともに、突合せ部の内周に枠状補助部材を配置して前記突合せ部を覆う突合せ工程と、前記枠状補助部材の内周面から回転した前記攪拌ピンを挿入し、前記枠状補助部材及び前記両筒状金属部材、又は、前記枠状補助部材のみに前記攪拌ピンのみを接触させた状態で前記突合せ部を摩擦攪拌する内側本接合工程と、を含むことを特徴とする。   Further, the present invention is a friction stir welding method for joining two cylindrical metal members using a rotary tool equipped with a stirring pin, the end surfaces of the cylindrical metal members are butted together, and the inside of the butted portion A frame-shaped auxiliary member is disposed on the periphery to cover the butted portion, and the stirring pin rotated from the inner peripheral surface of the frame-shaped auxiliary member is inserted, and the frame-shaped auxiliary member and the both cylindrical metal members are inserted. Or an inner main joining step in which the butted portion is frictionally stirred in a state where only the stirring pin is in contact with only the frame-shaped auxiliary member.

かかる方法によれば、枠状補助部材及び両筒状金属部材の両方、又は、枠状補助部材のみに攪拌ピンのみを接触した状態で摩擦攪拌を行うため、従来の方法よりも筒状金属部材に作用する押圧力を低減することができる。これにより、筒状金属部材の内側又は外側に塑性流動化した金属が流出するのを防ぐことができる。また、回転ツールを挿入する側に枠状補助部材を設けることにより、摩擦攪拌による金属不足を補うことができる。   According to this method, since the friction stir is performed in a state where only the stirring pin is in contact with both the frame-shaped auxiliary member and both the cylindrical metal members or only the frame-shaped auxiliary member, the cylindrical metal member is more than the conventional method. It is possible to reduce the pressing force acting on the. Thereby, it is possible to prevent the plastic fluidized metal from flowing out to the inside or outside of the cylindrical metal member. In addition, by providing a frame-like auxiliary member on the side where the rotary tool is inserted, metal shortage due to frictional stirring can be compensated.

また、前記外側本接合工程後に、前記筒状金属部材の外周面から突出する前記枠状補助部材を切除する切除工程を含むことが好ましい。また、前記内側本接合工程後に、前記筒状金属部材の内周面から突出する前記枠状補助部材を切除する切除工程を含むことが好ましい。   Moreover, it is preferable to include the cutting process which cuts out the said frame-shaped auxiliary member which protrudes from the outer peripheral surface of the said cylindrical metal member after the said outer side main joining process. Moreover, it is preferable to include the cutting process which cuts out the said frame-shaped auxiliary member which protrudes from the internal peripheral surface of the said cylindrical metal member after the said inner side main joining process.

かかる方法によれば、筒状金属部材の外周面又は内周面を平滑にすることができる。   According to this method, the outer peripheral surface or inner peripheral surface of the cylindrical metal member can be smoothed.

また、前記外側本接合工程を行う前に、前記枠状補助部材と前記筒状金属部材とを仮接合する仮接合工程を含むことが好ましい。また、前記内側本接合工程を行う前に、前記枠状補助部材と前記筒状金属部材とを仮接合する仮接合工程を含むことが好ましい。   Moreover, it is preferable to include the temporary joining process of temporarily joining the said frame-shaped auxiliary member and the said cylindrical metal member before performing the said outer side main joining process. Moreover, it is preferable to include the temporary joining process of temporarily joining the said frame-shaped auxiliary member and the said cylindrical metal member before performing the said inner side main joining process.

かかる方法によれば、筒状金属部材に対して枠状補助部材が固定されるため、外側本接合工程又は内側本接合工程を安定して行うことができる。   According to this method, since the frame-shaped auxiliary member is fixed to the cylindrical metal member, the outer main bonding step or the inner main bonding step can be stably performed.

また、前記突合せ工程では、前記突合せ部に形成された凹部に、前記凹部の深さよりも大きな厚さの前記枠状補助部材を配置することが好ましい。   In the butting step, it is preferable that the frame-shaped auxiliary member having a thickness larger than the depth of the recess is disposed in the recess formed in the butting portion.

かかる方法によれば、枠状補助部材の位置決めを容易に行うことができるとともに、外側本接合工程又は内側本接合工程を安定して行うことができる。また、枠状補助部材の厚さを凹部の深さよりも大きくすることにより、金属不足を確実に防ぐことができる。   According to this method, the frame-shaped auxiliary member can be easily positioned, and the outer main bonding step or the inner main bonding step can be stably performed. Further, by making the thickness of the frame-shaped auxiliary member larger than the depth of the concave portion, it is possible to reliably prevent metal shortage.

また、前記凹部の両側壁と前記枠状補助部材との一対の突合せ部に対してそれぞれ摩擦攪拌を行うことが好ましい。   Moreover, it is preferable to perform frictional stirring with respect to a pair of butted portions of both side walls of the recess and the frame-shaped auxiliary member.

かかる方法によれば、一対の突合せ部が摩擦攪拌されるため、水密性及び気密性を高めることができる。   According to this method, since the pair of butting portions are frictionally stirred, the water tightness and the air tightness can be improved.

また、本発明は、攪拌ピンを備えた回転ツールを用いて二つの筒状金属部材を接合する摩擦攪拌接合方法であって、前記筒状金属部材の端面同士を突き合わせるとともに、突合せ部の外周及び内周にそれぞれ枠状補助部材を配置して前記突合せ部を覆う突合せ工程と、前記枠状補助部材の外周面から回転した前記攪拌ピンを挿入し、前記枠状補助部材及び前記両筒状金属部材、又は、前記枠状補助部材のみに前記攪拌ピンのみを接触させた状態で前記突合せ部を摩擦攪拌する外側本接合工程と、前記枠状補助部材の内周面から回転した前記攪拌ピンを挿入し、前記枠状補助部材及び前記両筒状金属部材、又は、前記枠状補助部材のみに前記攪拌ピンのみを接触させた状態で前記突合せ部を摩擦攪拌する内側本接合工程と、を含み、前記外側本接合工程で形成された塑性化領域と、前記内側本接合工程で形成された塑性化領域とを重複させることを特徴とする。   Further, the present invention is a friction stir welding method for joining two cylindrical metal members using a rotary tool provided with a stirring pin, the end surfaces of the cylindrical metal members are butted together, and the outer periphery of the butted portion A frame-shaped auxiliary member disposed on the inner periphery and covering the butted portion; and the stirring pin rotated from the outer peripheral surface of the frame-shaped auxiliary member is inserted, and the frame-shaped auxiliary member and the both cylindrical shapes are inserted. An outer main joining step in which the abutting portion is frictionally stirred in a state where only the stirring pin is brought into contact with only the metal member or the frame-shaped auxiliary member, and the stirring pin rotated from the inner peripheral surface of the frame-shaped auxiliary member An inner main joining step in which the butt portion is frictionally stirred in a state where only the stirring pin is in contact with only the frame-shaped auxiliary member and the frame-shaped auxiliary member and the cylindrical metal member. Including the outer book A plasticized region formed in case step, characterized in that to duplicate the plasticized region formed in the inner main bonding step.

かかる方法によれば、枠状補助部材及び両筒状金属部材の両方、又は、枠状補助部材のみに攪拌ピンのみを接触した状態で摩擦攪拌を行うため、従来の方法よりも筒状金属部材に作用する押圧力を低減することができる。これにより、筒状金属部材の内側又は外側に塑性流動化した金属が流出するのを防ぐことができる。また、枠状補助部材を設けることにより、摩擦攪拌による金属不足を補うことができる。また、突合せ部の外側に形成された塑性化領域と内側に形成された塑性化領域とを重複させることにより、突合せ部の全体が摩擦攪拌されるため、水密性及び気密性を高めることができる。   According to this method, since the friction stir is performed in a state where only the stirring pin is in contact with both the frame-shaped auxiliary member and both the cylindrical metal members or only the frame-shaped auxiliary member, the cylindrical metal member is more than the conventional method. It is possible to reduce the pressing force acting on the. Thereby, it is possible to prevent the plastic fluidized metal from flowing out to the inside or outside of the cylindrical metal member. In addition, by providing the frame-like auxiliary member, it is possible to compensate for a metal shortage due to friction stirring. In addition, by overlapping the plasticized region formed outside the butted portion and the plasticized region formed inside, the entire butted portion is frictionally stirred, so that watertightness and airtightness can be improved. .

本発明に係る摩擦攪拌接合方法によれば、筒状金属部材の内側又は外側への金属部材の流出を防ぐことができるとともに、摩擦攪拌による金属不足を防ぐことができる。   According to the friction stir welding method according to the present invention, it is possible to prevent the metal member from flowing out to the inside or outside of the cylindrical metal member, and to prevent metal shortage due to friction stirring.

本接合用回転ツールを示す側面図である。It is a side view which shows the rotation tool for this joining. 本発明の第一実施形態に係る摩擦攪拌接合の筒状金属部材及び外側枠状補助部材を示す斜視図である。It is a perspective view which shows the cylindrical metal member and outer side frame-shaped auxiliary member of friction stir welding which concern on 1st embodiment of this invention. 第一実施形態に係る摩擦攪拌接合方法の突合せ工程及び仮接合工程を示す断面図である。It is sectional drawing which shows the butt | matching process and temporary joining process of the friction stir welding method which concerns on 1st embodiment. 第一実施形態に係る摩擦攪拌接合方法の外側本接合工程を示す断面図である。It is sectional drawing which shows the outer side final joining process of the friction stir welding method which concerns on 1st embodiment. 第一実施形態に係る摩擦攪拌接合方法の外側本接合工程を示す図であって、(a)は斜視図であり、(b)は断面図である。It is a figure which shows the outer side main joining process of the friction stir welding method which concerns on 1st embodiment, Comprising: (a) is a perspective view, (b) is sectional drawing. (a)は第一実施形態に係る摩擦攪拌接合方法の切除工程前を示す断面図であり、(b)は切除工程後を示す断面図である。(A) is sectional drawing which shows before the cutting process of the friction stir welding method which concerns on 1st embodiment, (b) is sectional drawing which shows after the cutting process. 第一実施形態に係る摩擦攪拌接合方法の変形例を示す斜視図であって、(a)は突合せ工程を示し、(b)は外側本接合工程を示す。It is a perspective view which shows the modification of the friction stir welding method which concerns on 1st embodiment, Comprising: (a) shows a butt | matching process, (b) shows an outer side main joining process. (a)は本発明の第二実施形態に係る摩擦攪拌接合方法の筒状金属部材及び外側枠状補助部材を示す斜視図であり、(b)は凹部を示す断面図である。(A) is a perspective view which shows the cylindrical metal member and outer frame-shaped auxiliary member of the friction stir welding method which concern on 2nd embodiment of this invention, (b) is sectional drawing which shows a recessed part. 第二実施形態に係る摩擦攪拌接合方法の突合せ工程及び仮接合工程を示す断面図である。It is sectional drawing which shows the butt | matching process and temporary joining process of the friction stir welding method which concerns on 2nd embodiment. 第二実施形態に係る摩擦攪拌接合方法の外側本接合工程を示す断面図である。It is sectional drawing which shows the outer side final joining process of the friction stir welding method which concerns on 2nd embodiment. (a)は第二実施形態に係る摩擦攪拌接合方法の切除工程前を示す断面図であり、(b)は切除工程後を示す断面図である。(A) is sectional drawing which shows before the cutting process of the friction stir welding method which concerns on 2nd embodiment, (b) is sectional drawing which shows after the cutting process. 第二実施形態に係る摩擦攪拌接合方法の補修工程を示す断面図である。It is sectional drawing which shows the repair process of the friction stir welding method which concerns on 2nd embodiment. 第二実施形態に係る摩擦攪拌接合方法の変形例を示す斜視図であって、(a)は突合せ工程を示し、(b)は外側本接合工程を示す。It is a perspective view which shows the modification of the friction stir welding method which concerns on 2nd embodiment, Comprising: (a) shows a butt | matching process, (b) shows an outer side main joining process. 本発明の第三実施形態に係る摩擦攪拌接合の筒状金属部材及び内側枠状補助部材を示す斜視図である。It is a perspective view which shows the cylindrical metal member and inner side frame-shaped auxiliary member of the friction stir welding which concern on 3rd embodiment of this invention. 第三実施形態に係る摩擦攪拌接合方法の突合せ工程及び仮接合工程を示す断面図である。It is sectional drawing which shows the butt | matching process and temporary joining process of the friction stir welding method which concerns on 3rd embodiment. 第三実施形態に係る摩擦攪拌接合方法の内側本接合工程を示す断面図である。It is sectional drawing which shows the inner side main joining process of the friction stir welding method which concerns on 3rd embodiment. 図16のI−I断面図である。It is II sectional drawing of FIG. (a)は第三実施形態に係る摩擦攪拌接合方法の切除工程前を示す断面図であり、(b)は切除工程後を示す断面図である。(A) is sectional drawing which shows before the cutting process of the friction stir welding method which concerns on 3rd embodiment, (b) is sectional drawing which shows after the cutting process. (a)は本発明の第四実施形態に係る摩擦攪拌接合方法の筒状金属部材及び内側枠状補助部材を示す斜視図であり、(b)は凹部を示す断面図である。(A) is a perspective view which shows the cylindrical metal member and inner side frame-shaped auxiliary member of the friction stir welding method which concern on 4th embodiment of this invention, (b) is sectional drawing which shows a recessed part. 第四実施形態に係る摩擦攪拌接合方法の突合せ工程及び仮接合工程を示す断面図である。It is sectional drawing which shows the butt | matching process and temporary joining process of the friction stir welding method which concerns on 4th embodiment. 第四実施形態に係る摩擦攪拌接合方法の内側本接合工程を示す断面図である。It is sectional drawing which shows the inner side main joining process of the friction stir welding method which concerns on 4th embodiment. 第四実施形態に係る摩擦攪拌接合方法の補修工程を示す断面図である。It is sectional drawing which shows the repair process of the friction stir welding method which concerns on 4th embodiment. 第五実施形態に係る内側本接合工程を示す断面図である。It is sectional drawing which shows the inner side final joining process which concerns on 5th embodiment. 第六実施形態に係る内側本接合工程を示す断面図である。It is sectional drawing which shows the inner side final joining process which concerns on 6th embodiment.

本発明の実施形態について図面を参照して詳細に説明する。まずは、本実施形態で用いる本接合用回転ツールについて説明する。   Embodiments of the present invention will be described in detail with reference to the drawings. First, the main welding rotary tool used in the present embodiment will be described.

図1に示すように、本接合用回転ツールFは、連結部F1と、攪拌ピンF2とで構成されている。本接合用回転ツールFは、特許請求の範囲の「回転ツール」に相当する。本接合用回転ツールFは、例えば工具鋼で形成されている。連結部F1は、摩擦攪拌装置の回転軸に連結される部位である。連結部F1は円柱状を呈し、ボルトが締結されるネジ孔B,Bが形成されている。   As shown in FIG. 1, the main rotating tool for joining F includes a connecting portion F1 and a stirring pin F2. The main joining rotary tool F corresponds to a “rotary tool” in the claims. The main rotating tool F for joining is formed of, for example, tool steel. The connecting part F1 is a part connected to the rotating shaft of the friction stirrer. The connecting portion F1 has a cylindrical shape, and is formed with screw holes B and B to which bolts are fastened.

攪拌ピンF2は、連結部F1から垂下しており、連結部F1と同軸になっている。攪拌ピンF2は連結部F1から離間するにつれて先細りになっている。   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.

攪拌ピンF2の外周面には螺旋溝F3が刻設されている。本実施形態では、本接合用回転ツールFを右回転させるため、螺旋溝F3は、基端から先端に向かうにつれて左回りに形成されている。言い換えると、螺旋溝F3は、螺旋溝F3を基端から先端に向けてなぞると上から見て左回りに形成されている。   A spiral groove F3 is formed on the outer peripheral surface of the stirring pin F2. In the present embodiment, the spiral groove F3 is formed in a counterclockwise direction from the proximal end toward the distal end in order to rotate the main joining rotary tool F to the right. In other words, the spiral groove F3 is formed counterclockwise as viewed from above when the spiral groove F3 is traced from the base end to the tip.

なお、本接合用回転ツールFを左回転させる場合は、螺旋溝F3を基端から先端に向かうにつれて右回りに形成することが好ましい。言い換えると、この場合の螺旋溝F3は、螺旋溝F3を基端から先端に向けてなぞると上から見て右回りに形成されている。螺旋溝F3をこのように設定することで、摩擦攪拌の際に塑性流動化した金属が螺旋溝F3によって攪拌ピンF2の先端側に導かれる。これにより、被接合金属部材(筒状金属部材1,1)の外部に溢れ出る金属の量を少なくすることができる。   In addition, when rotating this welding rotation tool F counterclockwise, it is preferable to form the spiral groove F3 in the clockwise direction from the proximal end toward the distal end. In other words, the spiral groove F3 in this case is formed clockwise when viewed from above when the spiral groove F3 is traced from the proximal end to the distal end. By setting the spiral groove F3 in this way, the plastic fluidized metal at the time of frictional stirring is guided to the tip side of the stirring pin F2 by the spiral groove F3. Thereby, the quantity of the metal which overflows to the exterior of a to-be-joined metal member (tubular metal member 1, 1) can be decreased.

本接合用回転ツールFを用いて摩擦攪拌接合をする際には、被接合金属部材に回転した攪拌ピンF2のみを挿入し、被接合金属部材と連結部F1とは離間させつつ移動させる。本接合用回転ツールFの詳細な接合形態については後記する。   When the friction stir welding is performed using the main rotating tool F, only the rotated stirring pin F2 is inserted into the metal member to be bonded, and the metal member to be bonded and the connecting portion F1 are moved while being separated from each other. A detailed joining form of the main joining rotary tool F will be described later.

[第一実施形態]
次に、第一実施形態に係る摩擦攪拌接合方法について説明する。図2に示すように、本実施形態では、筒状金属部材1,1同士を突き合わせるとともに、外側枠状補助部材11を配置して摩擦攪拌によって接合する。
[First embodiment]
Next, the friction stir welding method according to the first embodiment will be described. As shown in FIG. 2, in this embodiment, the cylindrical metal members 1 and 1 are abutted with each other, and the outer frame-shaped auxiliary member 11 is disposed and joined by friction stirring.

筒状金属部材1,1は、円筒状の金属製部材であって、それぞれ同等の形状になっている。筒状金属部材1,1は、少なくとも突き合わされる部分が同等の形状であればよい。筒状金属部材1,1は同等の材料で形成されている。筒状金属部材1の材料は、摩擦攪拌可能な金属であれば特に制限されないが、例えば、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から適宜選択すればよい。   The cylindrical metal members 1 and 1 are cylindrical metal members and have the same shape. The cylindrical metal members 1 and 1 should just have an equivalent shape at least at the part to be faced. The cylindrical metal members 1 and 1 are formed of the same material. The material of the cylindrical metal member 1 is not particularly limited as long as it is a metal capable of friction stirring, but may be appropriately selected from, for example, aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, magnesium alloy, and the like. .

外側枠状補助部材(枠状補助部材)11は、円筒状の金属部材である。外側枠状補助部材11の材料は特に制限されないが、本実施形態のように筒状金属部材1と同等であることが好ましい。外側枠状補助部材11の内径は、筒状金属部材1の外径と略同等になっている。外側枠状補助部材11の板厚は一定になっている。   The outer frame-shaped auxiliary member (frame-shaped auxiliary member) 11 is a cylindrical metal member. The material of the outer frame-shaped auxiliary member 11 is not particularly limited, but is preferably equivalent to the cylindrical metal member 1 as in the present embodiment. The inner diameter of the outer frame-shaped auxiliary member 11 is substantially equal to the outer diameter of the cylindrical metal member 1. The plate | board thickness of the outer side frame-shaped auxiliary member 11 is constant.

第一実施形態に係る摩擦攪拌接合方法では、突合せ工程と、仮接合工程と、外側本接合工程と、切除工程とを行う。   In the friction stir welding method according to the first embodiment, a butt process, a temporary bonding process, an outer main bonding process, and a cutting process are performed.

突合せ工程は、図3に示すように、筒状金属部材1,1の端面1a,1a同士を突き合わせるとともに、第一突合せ部J1の外周に外側枠状補助部材11を配置して第一突合せ部J1を覆う工程である。突合せ工程により、筒状金属部材1,1の外周面1b,1bが面一になるとともに内周面1c,1cが面一になる。また、筒状金属部材1,1の外周面1b,1bと外側枠状補助部材11の内周面11bとが面接触する。   As shown in FIG. 3, the butting process is performed by matching the end faces 1a and 1a of the cylindrical metal members 1 and 1 with the outer frame-shaped auxiliary member 11 disposed on the outer periphery of the first butting portion J1. This is a step of covering the part J1. By the butting process, the outer peripheral surfaces 1b and 1b of the cylindrical metal members 1 and 1 are flush with each other, and the inner circumferential surfaces 1c and 1c are flush with each other. Moreover, the outer peripheral surfaces 1b and 1b of the cylindrical metal members 1 and 1 and the inner peripheral surface 11b of the outer frame-shaped auxiliary member 11 are in surface contact.

仮接合工程は、図3に示すように、筒状金属部材1,1と外側枠状補助部材11とを仮接合する工程である。筒状金属部材1,1と外側枠状補助部材11との接合方法は特に制限されないが、本実施形態では溶接で接合している。筒状金属部材1,1と外側枠状補助部材11との入隅部には、溶接金属W0,W0が形成される。仮接合工程によって、筒状金属部材1,1に対して外側枠状補助部材11が固定される。   As shown in FIG. 3, the temporary joining step is a step of temporarily joining the cylindrical metal members 1 and 1 and the outer frame-shaped auxiliary member 11. The method for joining the cylindrical metal members 1 and 1 and the outer frame-shaped auxiliary member 11 is not particularly limited, but in this embodiment, the joining is performed by welding. Weld metals W0, W0 are formed at the corners between the cylindrical metal members 1, 1 and the outer frame auxiliary member 11. The outer frame-shaped auxiliary member 11 is fixed to the cylindrical metal members 1 and 1 by the temporary joining step.

外側本接合工程は、図4に示すように、本接合用回転ツールFを用いて第一突合せ部J1の外側から摩擦攪拌する工程である。外側本接合工程では、本接合用回転ツールFを外側枠状補助部材11の外周面11aから所定の深さで挿入する。そして、外側枠状補助部材11に対して本接合用回転ツールFを相対移動させて第一突合せ部J1の全長を摩擦攪拌する。   As shown in FIG. 4, the outer main joining step is a step in which friction stirring is performed from the outside of the first butting portion J <b> 1 using the main welding rotary tool F. In the outer main joining step, the main joining rotary tool F is inserted from the outer peripheral surface 11a of the outer frame-shaped auxiliary member 11 at a predetermined depth. Then, the main rotating tool F is moved relative to the outer frame-shaped auxiliary member 11 to frictionally stir the entire length of the first abutting portion J1.

図5の(a)及び(b)に示すように、外側本接合工程は、本実施形態では回転装置Rを用いる。回転装置Rは、筒状金属部材1,1の軸心周りに筒状金属部材1,1を回転させる装置である。回転装置Rは、第一回転ローラR1,R1と、第二回転ローラR2,R2とで構成されている。   As shown to (a) and (b) of FIG. 5, a rotation apparatus R is used for an outer side final joining process in this embodiment. The rotating device R is a device that rotates the cylindrical metal members 1 and 1 around the axis of the cylindrical metal members 1 and 1. The rotating device R includes first rotating rollers R1 and R1 and second rotating rollers R2 and R2.

第一回転ローラR1,R1は、円柱状を呈する。第一回転ローラR1,R1は、駆動装置に接続されており、第一回転ローラR1の軸心周りに正逆回転可能になっている。第一回転ローラR1の外周面R1cは、一方の筒状金属部材1の外周面1bと接触している。第一回転ローラR1,R1は同じ高さ位置において、離間して配置されている。   The first rotating rollers R1 and R1 have a cylindrical shape. The first rotating rollers R1 and R1 are connected to a driving device, and can rotate forward and backward around the axis of the first rotating roller R1. The outer peripheral surface R1c of the first rotating roller R1 is in contact with the outer peripheral surface 1b of one cylindrical metal member 1. The first rotating rollers R1, R1 are spaced apart at the same height position.

第二回転ローラR2,R2は、円柱状を呈する。第二回転ローラR2,R2は、駆動装置に接続されており、第二回転ローラR2の軸心周りに正逆回転可能になっている。第二回転ローラR2,R2は、他方の筒状金属部材1の外周面1bと接触している。第二回転ローラR2,R2は同じ高さ位置において、離間して配置されている。   The second rotating rollers R2 and R2 have a cylindrical shape. The second rotating rollers R2 and R2 are connected to a driving device, and can rotate forward and backward around the axis of the second rotating roller R2. The second rotating rollers R2 and R2 are in contact with the outer peripheral surface 1b of the other cylindrical metal member 1. The second rotary rollers R2 and R2 are spaced apart at the same height position.

回転装置Rは、第一回転ローラR1,R1及び第二回転ローラR2,R2が各軸心周りに一方向(例えば、右回り)に回転することにより、当該回転力が筒状金属部材1,1に伝達され、筒状金属部材1,1が筒状金属部材1の軸心周りに他方向(左回り)に回転するように構成されている。   In the rotating device R, the first rotating rollers R1 and R1 and the second rotating rollers R2 and R2 rotate in one direction (for example, clockwise) around each axis, so that the rotational force is applied to the cylindrical metal member 1, 1, the cylindrical metal members 1, 1 are configured to rotate in the other direction (counterclockwise) around the axis of the cylindrical metal member 1.

外側本接合工程では、まず、回転装置R上に筒状金属部材1,1を配置した後、右回転させた本接合用回転ツールFを降下させて、外側枠状補助部材11の外周面11aから攪拌ピンF2を所定の深さで挿入する。そして、本接合用回転ツールFの位置は固定した状態で、回転装置Rを駆動させて筒状金属部材1,1を軸心周りに回転させる。これにより、図5の(b)に示すように、第一突合せ部J1が摩擦攪拌される。   In the outer main joining step, first, the cylindrical metal members 1 and 1 are arranged on the rotating device R, and then the main welding rotating tool F rotated to the right is lowered, and the outer peripheral surface 11a of the outer frame-shaped auxiliary member 11 is lowered. Then, the stirring pin F2 is inserted at a predetermined depth. Then, with the position of the main rotating tool for joining F being fixed, the rotating device R is driven to rotate the cylindrical metal members 1 and 1 around the axis. Thereby, as shown to (b) of FIG. 5, the 1st butt | matching part J1 is friction-stirred.

外側本接合工程では、外側枠状補助部材11を貫通させ攪拌ピンF2の先端を筒状金属部材1,1に接触させる。外側本接合工程では、筒状金属部材1,1及び外側枠状補助部材11に回転した攪拌ピンF2のみを挿入し、外側枠状補助部材11と連結部F1とは離間させつつ相対移動させる。言い換えると、攪拌ピンF2の基端部は露出させた状態で摩擦攪拌接合を行う。本接合用回転ツールFの移動軌跡には摩擦攪拌された金属が硬化することにより外側塑性化領域W1が形成される。   In the outer main joining step, the outer frame-shaped auxiliary member 11 is penetrated and the tip of the stirring pin F2 is brought into contact with the cylindrical metal members 1 and 1. In the outer main joining process, only the rotated stirring pin F2 is inserted into the cylindrical metal members 1, 1 and the outer frame-shaped auxiliary member 11, and the outer frame-shaped auxiliary member 11 and the connecting portion F1 are moved relative to each other while being separated from each other. In other words, the friction stir welding is performed with the base end portion of the stirring pin F2 exposed. The outer plasticized region W1 is formed in the movement locus of the main rotating tool F for bonding by hardening the friction-stirred metal.

外側塑性化領域W1は、一定の深さで形成される。外側塑性化領域W1の始端と終端とはオーバーラップするように設定することが好ましい。これにより、第一突合せ部J1の全長を確実に摩擦攪拌することができる。   The outer plasticizing region W1 is formed with a certain depth. It is preferable to set the start end and the end of the outer plasticizing region W1 to overlap. As a result, the entire length of the first butting portion J1 can be reliably frictionally stirred.

なお、本接合用回転ツールFの挿入深さは、本接合用回転ツールFが筒状金属部材1,1に接触せず、外側枠状補助部材11にのみ接触するように設定してもよい。この場合は、攪拌ピンF2と外側枠状補助部材11との接触によって生じた摩擦熱で、筒状金属部材1,1が塑性流動化されることにより第一突合せ部J1が接合される。   The insertion depth of the main joining rotary tool F may be set so that the main joining rotary tool F does not contact the cylindrical metal members 1, 1 but only the outer frame-shaped auxiliary member 11. . In this case, the first butted portion J1 is joined by plastic fluidizing the cylindrical metal members 1 and 1 by the frictional heat generated by the contact between the stirring pin F2 and the outer frame-shaped auxiliary member 11.

また、本接合用回転ツールFを離脱させる際には、本接合用回転ツールFと外側枠状補助部材11及び筒状金属部材1,1とを相対的に移動させつつ、攪拌ピンF2を外側枠状補助部材11から徐々に引き抜くようにしてもよい。本接合用回転ツールFの形状、回転数や送り速度等の条件にもよるが、抜き跡の深さを細かく調整することが可能である。また、本実施形態では回転装置Rを用いたが、他の装置を用いて筒状金属部材1,1を回転させてもよいし、ロボットアームの先端に本接合用回転ツールFを取り付けて、固定された筒状金属部材1,1周りに本接合用回転ツールFを移動させてもよい。   Further, when the main welding rotary tool F is detached, the stirring pin F2 is moved outward while the main welding rotary tool F, the outer frame-shaped auxiliary member 11 and the cylindrical metal members 1 and 1 are relatively moved. You may make it gradually pull out from the frame-shaped auxiliary member 11. Although depending on conditions such as the shape, rotational speed, feed rate, etc. of the main rotating tool for welding, the depth of the trace can be finely adjusted. In the present embodiment, the rotating device R is used. However, the cylindrical metal members 1 and 1 may be rotated by using another device, or the main rotating tool F is attached to the tip of the robot arm. The main rotating tool F may be moved around the fixed cylindrical metal members 1 and 1.

切除工程は、筒状金属部材1の外周面1bから突出する外側枠状補助部材11を切除する工程である。図6の(a)に示すように、外側本接合工程を行うと、外側枠状補助部材11の外周面11aには凹溝12が形成されるとともに、凹溝12の周囲にバリVが形成される。本実施形態では、ショルダ部で塑性流動化した金属を押さえないで外側本接合工程を行うため、摩擦攪拌によって形成される凹溝12が深くなる傾向にあるとともにバリVが多く発生しやすい。   The cutting process is a process of cutting the outer frame-shaped auxiliary member 11 protruding from the outer peripheral surface 1 b of the cylindrical metal member 1. As shown in FIG. 6A, when the outer main joining step is performed, a concave groove 12 is formed on the outer peripheral surface 11 a of the outer frame-shaped auxiliary member 11, and a burr V is formed around the concave groove 12. Is done. In the present embodiment, the outer main joining process is performed without pressing the plastic fluidized metal in the shoulder portion. Therefore, the concave grooves 12 formed by friction stirring tend to be deep, and many burrs V are likely to occur.

外側本接合工程によって形成される凹溝12の底面12aは、筒状金属部材1の外周面1bよりも上方に位置している。外側枠状補助部材11の厚さや形状等は、外側本接合工程によって形成された凹溝12の底面12aが筒状金属部材1の外周面1bよりも上方に位置するように設定することが好ましい。   The bottom surface 12 a of the concave groove 12 formed by the outer main joining process is located above the outer peripheral surface 1 b of the cylindrical metal member 1. The thickness, shape, etc. of the outer frame-shaped auxiliary member 11 are preferably set so that the bottom surface 12a of the concave groove 12 formed by the outer main joining step is positioned above the outer peripheral surface 1b of the cylindrical metal member 1. .

切除工程は、本実施形態では、外側枠状補助部材11、バリV及び溶接金属W0を切除する。切除工程では、図6の(a)に示すように、筒状金属部材1の外周面1bを含む基準面に沿って、外側枠状補助部材11、バリV及び溶接金属W0を切除する。これにより、図6の(b)に示すように、筒状金属部材1の外周面1bと外側塑性化領域W1の表面とは面一になる。   In the cutting process, in this embodiment, the outer frame-shaped auxiliary member 11, the burr V, and the weld metal W0 are cut. In the cutting process, as shown in FIG. 6A, the outer frame-shaped auxiliary member 11, the burr V, and the weld metal W0 are cut along the reference surface including the outer peripheral surface 1b of the cylindrical metal member 1. Thereby, as shown in FIG. 6B, the outer peripheral surface 1b of the cylindrical metal member 1 and the surface of the outer plasticized region W1 are flush with each other.

なお、切除工程では、筒状金属部材1の外周面1bを含む基準面よりも上方(凹溝12側)の位置で切除してもよい。つまり、切除工程では、筒状金属部材1の外周面1bから突出する外側枠状補助部材11の一部を切除するだけでもよい。また、切除工程は省略してもよい。   In the cutting step, the cylindrical metal member 1 may be cut at a position above the reference surface including the outer peripheral surface 1b (on the side of the concave groove 12). That is, in the cutting process, only a part of the outer frame-shaped auxiliary member 11 protruding from the outer peripheral surface 1b of the cylindrical metal member 1 may be cut. The excision process may be omitted.

以上説明した本実施形態に係る摩擦攪拌接合方法では、筒状金属部材1,1及び外側枠状補助部材11の両方、又は、外側枠状補助部材11のみに攪拌ピンF2のみを接触した状態で摩擦攪拌を行うため、従来の方法よりも筒状金属部材1,1に作用する押圧力を低減することができる。これにより、筒状金属部材1,1の内側に塑性流動化した金属が流出するのを防ぐことができる。また、本接合用回転ツールFを挿入する側に枠状補助部材を設けることにより、摩擦攪拌による金属不足を補うことができる。   In the friction stir welding method according to the present embodiment described above, both the cylindrical metal members 1 and 1 and the outer frame auxiliary member 11 or only the outer frame auxiliary member 11 is in contact with only the stirring pin F2. Since frictional stirring is performed, the pressing force acting on the cylindrical metal members 1 and 1 can be reduced as compared with the conventional method. Thereby, it is possible to prevent the plastic fluidized metal from flowing out inside the cylindrical metal members 1, 1. Further, by providing the frame-shaped auxiliary member on the side where the main rotating tool F is inserted, the shortage of metal due to frictional stirring can be compensated.

また、切除工程を行うことで、筒状金属部材1,1の外周面1b,1bを平滑にすることができる。また、外側本接合工程を行う前に、外側枠状補助部材11と筒状金属部材1,1とを仮接合することで、筒状金属部材1,1に対して外側枠状補助部材11が固定されるため、外側本接合工程を安定して行うことができる。   Moreover, the outer peripheral surfaces 1b and 1b of the cylindrical metal members 1 and 1 can be smoothed by performing the cutting process. Moreover, before performing an outer side main joining process, the outer frame-shaped auxiliary member 11 and the cylindrical metal members 1 and 1 are temporarily joined by the outer frame-shaped auxiliary member 11 with respect to the cylindrical metal members 1 and 1. Since it is fixed, the outer main joining process can be performed stably.

以上本発明の第一実施形態について説明したが、本発明の趣旨に反しない範囲において適宜設計変更が可能である。例えば、第一実施形態では筒状金属部材1、1は円筒状を呈する部材であったが、他の形状であってもよい。   While the first embodiment of the present invention has been described above, design changes can be made as appropriate without departing from the spirit of the present invention. For example, in the first embodiment, the cylindrical metal members 1 and 1 are cylindrical members, but may have other shapes.

[変形例]
図7の(a)及び(b)に示す第一実施形態の変形例では、筒状金属部材1A,1Aが矩形筒状を呈する。また、外側枠状補助部材11Aも矩形枠状を呈する。外側枠状補助部材11Aの内周面11Abは、筒状金属部材1Aの外周面と面接触するようになっている。
[Modification]
In the modification of the first embodiment shown in FIGS. 7A and 7B, the cylindrical metal members 1A and 1A have a rectangular cylindrical shape. The outer frame-shaped auxiliary member 11A also has a rectangular frame shape. The inner peripheral surface 11Ab of the outer frame-shaped auxiliary member 11A is in surface contact with the outer peripheral surface of the cylindrical metal member 1A.

第一実施形態の変形例では、第一実施形態と同じ要領で突合せ工程と、仮接合工程と、外側本接合工程と、切除工程とを行う。図7の(b)に示すように、外側本接合工程では、外側枠状補助部材11Aの外周面11Aaから本接合用回転ツールFを挿入して、本接合用回転ツールFを直線状に相対移動させて、第一突合せ部に対して摩擦攪拌を行う。当該変形例でも、第一実施形態と略同等の効果を奏することができる。   In the modified example of the first embodiment, a butt process, a temporary joining process, an outer main joining process, and a cutting process are performed in the same manner as the first embodiment. As shown in FIG. 7B, in the outer main joining step, the main welding rotating tool F is inserted from the outer peripheral surface 11Aa of the outer frame-shaped auxiliary member 11A, and the main welding rotating tool F is linearly relative. Move and friction stir to the first butt. Even in this modification, it is possible to achieve substantially the same effect as that of the first embodiment.

[第二実施形態]
次に、本発明の第二実施形態に係る摩擦攪拌接合方法について説明する。第二実施形態に係る摩擦攪拌接合方法では、筒状金属部材1,1が突き合わされる部位に凹部を設ける点で第一実施形態と相違する。
[Second Embodiment]
Next, the friction stir welding method according to the second embodiment of the present invention will be described. The friction stir welding method according to the second embodiment is different from the first embodiment in that a recess is provided at a portion where the cylindrical metal members 1 and 1 are abutted.

図8の(a)に示すように、筒状金属部材1,1は円筒状を呈する。筒状金属部材1,1の端部の外側には、段差部10がそれぞれ形成されている。段差部10は、段差端面10aと、段差端面10aに対して垂直な段差周面10bとで形成されている。図8の(b)に示すように、筒状金属部材1,1の端面1a,1a同士を突き合わせると突合せ部J1が形成される。また、段差部10,10が突き合わされることにより、凹部30が形成される。凹部30は、筒状金属部材1,1の外側において、周方向に亘って形成される。   As shown in FIG. 8A, the cylindrical metal members 1 and 1 have a cylindrical shape. Stepped portions 10 are respectively formed on the outer sides of the end portions of the cylindrical metal members 1, 1. The step portion 10 is formed of a step end surface 10a and a step peripheral surface 10b perpendicular to the step end surface 10a. As shown in FIG. 8B, when the end faces 1a and 1a of the cylindrical metal members 1 and 1 are butted together, a butted portion J1 is formed. Moreover, the recessed part 30 is formed when the level | step-difference parts 10 and 10 are faced | matched. The recessed part 30 is formed over the circumferential direction on the outside of the cylindrical metal members 1, 1.

外側枠状補助部材(枠状補助部材)21は、円筒状の金属部材である。外側枠状補助部材21の材料は特に制限されないが、本実施形態のように筒状金属部材1と同等であることが好ましい。外側枠状補助部材21の内周面21bは、段差周面10bと面接触するようになっている。外側枠状補助部材21の板厚は一定になっている。   The outer frame-shaped auxiliary member (frame-shaped auxiliary member) 21 is a cylindrical metal member. The material of the outer frame-shaped auxiliary member 21 is not particularly limited, but is preferably equivalent to the cylindrical metal member 1 as in the present embodiment. The inner peripheral surface 21b of the outer frame-shaped auxiliary member 21 is in surface contact with the stepped peripheral surface 10b. The plate thickness of the outer frame-shaped auxiliary member 21 is constant.

第二実施形態に係る摩擦攪拌接合方法では、突合せ工程と、仮接合工程と、外側本接合工程と、切除工程と、補修工程とを行う。   In the friction stir welding method according to the second embodiment, a butt process, a temporary bonding process, an outer main bonding process, a cutting process, and a repairing process are performed.

突合せ工程は、図9に示すように、筒状金属部材1,1の端面1a,1a同士を突き合わせるとともに、第一突合せ部J1の外周に形成された凹部30に外側枠状補助部材21を配置して第一突合せ部J1を覆う工程である。つまり、筒状金属部材1,1の端面1a,1a同士を突き合わせる際に、外側枠状補助部材21は凹部30に挟み込まれるように配置される。   As shown in FIG. 9, the butting step butts the end faces 1 a, 1 a of the cylindrical metal members 1, 1, and attaches the outer frame-shaped auxiliary member 21 to the recess 30 formed on the outer periphery of the first butt portion J <b> 1. It is the process of arrange | positioning and covering the 1st butt | matching part J1. That is, when the end surfaces 1 a and 1 a of the cylindrical metal members 1 and 1 are abutted with each other, the outer frame-shaped auxiliary member 21 is disposed so as to be sandwiched between the recesses 30.

突合せ工程により、筒状金属部材1,1の外周面1b,1bが同一面上に位置するとともに内周面1c,1cが面一になる。また、凹部30の底面を構成する段差周面10b,10bと外側枠状補助部材21の内周面21bとが面接触する。また、凹部30の側壁を構成する段差端面10a,10aと外側枠状補助部材21の側面21c,21cとが面接触する。つまり、外側枠状補助部材21は、凹部30に隙間なく配置される。   By the butting process, the outer peripheral surfaces 1b and 1b of the cylindrical metal members 1 and 1 are positioned on the same surface and the inner peripheral surfaces 1c and 1c are flush with each other. Further, the step peripheral surfaces 10b, 10b constituting the bottom surface of the recess 30 and the inner peripheral surface 21b of the outer frame-shaped auxiliary member 21 are in surface contact. Further, the step end faces 10a, 10a constituting the side wall of the recess 30 and the side faces 21c, 21c of the outer frame-shaped auxiliary member 21 are in surface contact. That is, the outer frame-shaped auxiliary member 21 is disposed in the recess 30 without a gap.

外側枠状補助部材21の厚さは、凹部30の深さよりも大きくなっている。外側枠状補助部材21の厚さは、本実施形態では、凹部30の深さの2倍程度になっている。   The thickness of the outer frame-shaped auxiliary member 21 is larger than the depth of the recess 30. In the present embodiment, the thickness of the outer frame-shaped auxiliary member 21 is about twice the depth of the recess 30.

仮接合工程は、図9に示すように、筒状金属部材1,1と外側枠状補助部材21とを仮接合する工程である。筒状金属部材1,1と外側枠状補助部材21との接合方法は特に制限されないが、本実施形態では溶接で接合している。筒状金属部材1,1と外側枠状補助部材21との入隅部には、溶接金属W0,W0が形成される。仮接合工程によって、筒状金属部材1,1に対して外側枠状補助部材21が固定される。   The temporary joining step is a step of temporarily joining the cylindrical metal members 1, 1 and the outer frame-shaped auxiliary member 21 as shown in FIG. 9. The method for joining the cylindrical metal members 1 and 1 and the outer frame-shaped auxiliary member 21 is not particularly limited, but in this embodiment, the joining is performed by welding. Weld metals W0, W0 are formed at the corners between the cylindrical metal members 1, 1 and the outer frame auxiliary member 21. The outer frame-shaped auxiliary member 21 is fixed to the cylindrical metal members 1 and 1 by the temporary joining step.

外側本接合工程は、図10に示すように、本接合用回転ツールFを用いて第一突合せ部J1の外側から摩擦攪拌を行う工程である。外側本接合工程では、本接合用回転ツールFを外側枠状補助部材21の外周面21aから所定の深さで挿入する。そして、外側枠状補助部材21対して本接合用回転ツールFを相対移動させて第一突合せ部J1の全長を摩擦攪拌する。第二実施形態に係る外側本接合工程は、第一実施形態に係る外側本接合工程と略同等であるため詳細な説明は省略する。   As shown in FIG. 10, the outer main joining step is a step of performing friction stirring from the outside of the first butting portion J1 using the main welding rotating tool F. In the outer main joining step, the main joining rotary tool F is inserted from the outer peripheral surface 21a of the outer frame-shaped auxiliary member 21 at a predetermined depth. Then, the main rotating tool F is moved relative to the outer frame-shaped auxiliary member 21 to frictionally stir the entire length of the first butting portion J1. Since the outer main bonding process according to the second embodiment is substantially the same as the outer main bonding process according to the first embodiment, detailed description thereof is omitted.

切除工程は、筒状金属部材1の外周面1bから突出する外側枠状補助部材21を切除する工程である。図11の(a)に示すように、外側本接合工程を行うと、外側枠状補助部材21の外周面21aには凹溝22が形成されるとともに、凹溝22の周囲にバリVが形成される。本実施形態では、ショルダ部で塑性流動化した金属を押さえないで外側本接合工程を行うため、摩擦攪拌によって形成される凹溝22が深くなる傾向にあるとともにバリVが多く発生しやすい。   The cutting step is a step of cutting the outer frame-shaped auxiliary member 21 protruding from the outer peripheral surface 1 b of the cylindrical metal member 1. As shown in FIG. 11A, when the outer main joining step is performed, a concave groove 22 is formed on the outer peripheral surface 21 a of the outer frame-shaped auxiliary member 21, and burrs V are formed around the concave groove 22. Is done. In the present embodiment, since the outer main joining process is performed without pressing the plastic fluidized metal in the shoulder portion, the groove 22 formed by friction stirring tends to be deep and burrs V are likely to occur.

外側本接合工程によって形成される凹溝22の底面22aは、筒状金属部材1の外周面1bよりも上方に位置している。外側枠状補助部材21の厚さや形状等は、外側本接合工程によって形成された凹溝22の底面22aが筒状金属部材1の外周面1bよりも上方に位置するように設定することが好ましい。   The bottom surface 22 a of the concave groove 22 formed by the outer main joining process is located above the outer peripheral surface 1 b of the cylindrical metal member 1. The thickness, shape, and the like of the outer frame-shaped auxiliary member 21 are preferably set so that the bottom surface 22a of the concave groove 22 formed by the outer main bonding process is located above the outer peripheral surface 1b of the cylindrical metal member 1. .

切除工程は、本実施形態では、外側枠状補助部材21、バリV及び溶接金属W0を切除する。切除工程では、図11の(a)に示すように、筒状金属部材1の外周面1bを含む基準面に沿って、外側枠状補助部材21、バリV及び溶接金属W0を切除する。これにより、図11の(b)に示すように、筒状金属部材1の外周面1b、切除後の外側枠状補助部材21の表面及び切除後の外側塑性化領域W1の表面は面一になる。   In the cutting process, in this embodiment, the outer frame-shaped auxiliary member 21, the burr V, and the weld metal W0 are cut. In the cutting process, as shown in FIG. 11A, the outer frame-shaped auxiliary member 21, the burr V, and the weld metal W0 are cut along the reference surface including the outer peripheral surface 1b of the cylindrical metal member 1. Accordingly, as shown in FIG. 11B, the outer peripheral surface 1b of the cylindrical metal member 1, the surface of the outer frame-shaped auxiliary member 21 after cutting, and the surface of the outer plasticizing region W1 after cutting are flush with each other. Become.

なお、切除工程では、筒状金属部材1の外周面1bを含む基準面よりも上方(凹溝22側)の位置で切除してもよい。つまり、切除工程では、筒状金属部材1の外周面1bから突出する外側枠状補助部材21の一部を切除するだけでもよい。また、切除工程は省略してもよい。切除工程を行うと、外側枠状補助部材21の側面21cと筒状金属部材1,1とがそれぞれ突き合わされた一対の第二突合せ部J2,J2が露出する。   In the excision process, the cylindrical metal member 1 may be excised at a position above the reference surface including the outer peripheral surface 1b (on the concave groove 22 side). That is, in the cutting process, only a part of the outer frame-shaped auxiliary member 21 protruding from the outer peripheral surface 1b of the cylindrical metal member 1 may be cut. The excision process may be omitted. When the cutting process is performed, a pair of second butted portions J2 and J2 in which the side surface 21c of the outer frame-shaped auxiliary member 21 and the cylindrical metal members 1 and 1 are butted are exposed.

補修工程は、第二突合せ部J2,J2に対して摩擦攪拌接合を行う工程である。図12に示すように、補修工程では、小型回転ツールHを用いて第二突合せ部J2,J2に対して摩擦攪拌を行う。小型回転ツールHは、ショルダ部とショルダ部に突設された攪拌ピンとで構成されている。   The repair process is a process of performing friction stir welding on the second butted portions J2 and J2. As shown in FIG. 12, in the repairing process, friction agitation is performed on the second butted portions J2 and J2 using a small rotary tool H. The small rotary tool H includes a shoulder portion and a stirring pin protruding from the shoulder portion.

補修工程では、前記した回転装置R(図5参照)を用いて、筒状金属部材1,1を軸心周りに回転させながら摩擦攪拌を行う。補修工程では、第二突合せ部J2に小型回転ツールHのショルダ部を数ミリ程度押込んだ後、小型回転ツールHの位置は固定した状態で、筒状金属部材1,1を軸心周りに回転させる。これにより、第二突合せ部J2,J2の周方向の全体が摩擦攪拌される。小型回転ツールHの移動軌跡には塑性化領域W2,W2が形成される。補修工程では、第二突合せ部J2の深さ方向の全体が摩擦攪拌されることが好ましい。これにより、水密性及び気密性を高めることができる。なお、補修工程は省略してもよい。   In the repair process, friction stirring is performed using the rotating device R (see FIG. 5) while rotating the cylindrical metal members 1 and 1 around the axis. In the repair process, after the shoulder portion of the small rotary tool H is pushed into the second butting portion J2 by several millimeters, the position of the small rotary tool H is fixed, and the cylindrical metal members 1 and 1 are moved around the axis. Rotate. As a result, the entire circumferential direction of the second butted portions J2, J2 is frictionally stirred. Plasticizing regions W2 and W2 are formed on the movement trajectory of the small rotary tool H. In the repair process, it is preferable that the entire depth direction of the second butted portion J2 is frictionally stirred. Thereby, watertightness and airtightness can be improved. The repair process may be omitted.

以上説明した第二実施形態に係る摩擦攪拌接合方法によっても第一実施形態と略同等の効果を得ることができる。また、凹部30を設けることにより、筒状金属部材1,1に対する外側枠状補助部材21の位置決めを容易に行うことができるとともに、外側本接合工程を安定して行うことができる。また、本実施形態では、凹部30に外側枠状補助部材21を配置するとともに仮接合工程を行うため、より安定して外側本接合工程を行うことができる。   The effect substantially equivalent to 1st embodiment can be acquired also by the friction stir welding method which concerns on 2nd embodiment demonstrated above. Moreover, by providing the recessed part 30, while positioning the outer side frame-shaped auxiliary member 21 with respect to the cylindrical metal members 1 and 1, an outer side final joining process can be performed stably. Moreover, in this embodiment, since the outer side frame-shaped auxiliary member 21 is arrange | positioned in the recessed part 30, and a temporary joining process is performed, an outer side main joining process can be performed more stably.

また、補修工程を行うことで、外側枠状補助部材21と筒状金属部材1,1とが突き合わされて形成された第二突合せ部J2,J2が摩擦攪拌される。これにより、筒状金属部材1,1の水密性及び気密性を向上させることができる。また、本実施形態のように仮接合工程を溶接によって行う場合、切除工程を行った後に筒状金属部材1の外周面1bが変色していたり、改質したりする場合があるが、補修工程を行うことでこれらの変色箇所や改質箇所等の接合痕を補修することができる。   Further, by performing the repairing process, the second butted portions J2 and J2 formed by abutting the outer frame-shaped auxiliary member 21 and the cylindrical metal members 1 and 1 are friction-stirred. Thereby, the watertightness and airtightness of the cylindrical metal members 1 and 1 can be improved. Moreover, when performing a temporary joining process by welding like this embodiment, although the outer peripheral surface 1b of the cylindrical metal member 1 may discolor or modify | reform after performing a cutting process, repair process It is possible to repair joint marks such as discolored portions and modified portions.

以上本発明の第二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、第二実施形態では筒状金属部材1,1は円筒状を呈する部材であったが、他の形状であってもよい。   Although the second embodiment of the present invention has been described above, design changes can be made as appropriate without departing from the spirit of the present invention. For example, in the second embodiment, the cylindrical metal members 1 and 1 are cylindrical members, but may have other shapes.

[変形例]
図13の(a)及び(b)に示す第二実施形態の変形例では、筒状金属部材1B,1Bが矩形筒状を呈する。筒状金属部材1B,1Bの端部の外側には、段差部10B,10Bがそれぞれ形成されている。段差部10Bは、段差端面10Baと、段差端面10Baに対して垂直な段差周面10Bbとで形成されている。具体的な図示は省略するが、筒状金属部材1B,1Bの端面1Ba,1Ba同士を突き合わせると突合せ部が形成されるとともに、凹部が形成される。
[Modification]
In the modification of the second embodiment shown in FIGS. 13A and 13B, the cylindrical metal members 1B and 1B have a rectangular cylindrical shape. Step portions 10B and 10B are formed on the outer sides of the ends of the cylindrical metal members 1B and 1B, respectively. The step portion 10B is formed of a step end surface 10Ba and a step peripheral surface 10Bb perpendicular to the step end surface 10Ba. Although not specifically shown, when the end faces 1Ba and 1Ba of the cylindrical metal members 1B and 1B are brought into contact with each other, a butt portion is formed and a recess is formed.

外側枠状補助部材21Aも矩形枠状を呈する。外側枠状補助部材21Aは、筒状金属部材1B,1Bが突き合わされて形成された凹部に配置される。具体的には、筒状金属部材1B,1Bの端面1Ba,1Ba同士を突き合わせる際に、外側枠状補助部材21Aは凹部に挟み込まれるように配置される。外側枠状補助部材21Aの厚さは、当該凹部の深さよりも大きくなっている。外側枠状補助部材21Aの内周面21Abは、凹部の底面(段差周面10Bb,10Bb)と面接触するようになっている。   The outer frame-shaped auxiliary member 21A also has a rectangular frame shape. The outer frame-shaped auxiliary member 21A is disposed in a recess formed by abutting the cylindrical metal members 1B and 1B. Specifically, when the end surfaces 1Ba and 1Ba of the cylindrical metal members 1B and 1B are brought into contact with each other, the outer frame-shaped auxiliary member 21A is disposed so as to be sandwiched between the recesses. The thickness of the outer frame-shaped auxiliary member 21A is larger than the depth of the concave portion. The inner peripheral surface 21Ab of the outer frame-shaped auxiliary member 21A is in surface contact with the bottom surface of the recess (step peripheral surfaces 10Bb and 10Bb).

第二実施形態の変形例では、第二実施形態と同じ要領で突合せ工程と、仮接合工程と、外側本接合工程と、切除工程と、補修工程とを行う。図13の(b)に示すように、外側本接合工程では、外側枠状補助部材21Aの外周面21Aaから本接合用回転ツールFを挿入して、本接合用回転ツールFを直線状に相対移動させて、第一突合せ部に対して摩擦攪拌を行う。当該変形例でも、第二実施形態と略同等の効果を奏することができる。   In the modification of the second embodiment, a butt process, a temporary joining process, an outer main joining process, an excision process, and a repair process are performed in the same manner as the second embodiment. As shown in FIG. 13B, in the outer main joining step, the main welding rotating tool F is inserted from the outer peripheral surface 21Aa of the outer frame-shaped auxiliary member 21A, and the main welding rotating tool F is linearly relative. Move and friction stir to the first butt. Even in this modification, it is possible to achieve substantially the same effect as in the second embodiment.

[第三実施形態]
次に、本発明の第三実施形態に係る摩擦攪拌接合方法について説明する。第三実施形態に係る摩擦攪拌接合方法では、内側枠状補助部材31を用いて筒状金属部材1,1の内側から接合する点で第一実施形態と相違する。
[Third embodiment]
Next, the friction stir welding method according to the third embodiment of the present invention will be described. The friction stir welding method according to the third embodiment is different from the first embodiment in that the inner frame-shaped auxiliary member 31 is used to join from the inside of the cylindrical metal members 1 and 1.

図14に示すように、筒状金属部材1,1は第一実施形態と同等である。内側枠状補助部材31は、円筒状の金属部材である。内側枠状補助部材31の材料は特に制限されないが、本実施形態のように筒状金属部材1と同等であることが好ましい。内側枠状補助部材31の外径は、筒状金属部材1の内径と略同等になっている。内側枠状補助部材31の板厚は一定になっている。   As shown in FIG. 14, the cylindrical metal members 1, 1 are equivalent to the first embodiment. The inner frame-shaped auxiliary member 31 is a cylindrical metal member. The material of the inner frame-shaped auxiliary member 31 is not particularly limited, but is preferably equivalent to the cylindrical metal member 1 as in the present embodiment. The outer diameter of the inner frame-shaped auxiliary member 31 is substantially equal to the inner diameter of the cylindrical metal member 1. The plate thickness of the inner frame-shaped auxiliary member 31 is constant.

第三実施形態に係る摩擦攪拌接合方法では、突合せ工程と、仮接合工程と、内側本接合工程と、切除工程とを行う。   In the friction stir welding method according to the third embodiment, a butt process, a temporary bonding process, an inner main bonding process, and a cutting process are performed.

突合せ工程は、図15に示すように、筒状金属部材1,1の端面1a,1a同士を突き合わせるとともに、第一突合せ部J1の内周に内側枠状補助部材31を配置して第一突合せ部J1を覆う工程である。   As shown in FIG. 15, the butting process is performed by first butting the end faces 1 a and 1 a of the cylindrical metal members 1 and 1 with an inner frame-shaped auxiliary member 31 disposed on the inner periphery of the first butting portion J1. This is a step of covering the butt J1.

突合せ工程により、筒状金属部材1,1の外周面1b,1bが面一になるとともに内周面1c,1cが面一になる。また、筒状金属部材1,1の内周面1c,1cと内側枠状補助部材31の外周面31aとが面接触する。   By the butting process, the outer peripheral surfaces 1b and 1b of the cylindrical metal members 1 and 1 are flush with each other, and the inner circumferential surfaces 1c and 1c are flush with each other. Further, the inner peripheral surfaces 1c, 1c of the cylindrical metal members 1, 1 and the outer peripheral surface 31a of the inner frame-shaped auxiliary member 31 are in surface contact.

仮接合工程は、図15に示すように、筒状金属部材1,1と内側枠状補助部材31とを仮接合する工程である。筒状金属部材1,1と内側枠状補助部材31との接合方法は特に制限されないが、本実施形態では溶接で接合している。筒状金属部材1,1と内側枠状補助部材31との入隅部には、溶接金属W0,W0が形成される。仮接合工程によって、筒状金属部材1,1に対して内側枠状補助部材31が固定される。   The temporary joining step is a step of temporarily joining the cylindrical metal members 1 and 1 and the inner frame-shaped auxiliary member 31 as shown in FIG. The method for joining the cylindrical metal members 1 and 1 and the inner frame-shaped auxiliary member 31 is not particularly limited, but in this embodiment, the joining is performed by welding. Weld metals W0 and W0 are formed at the corners between the cylindrical metal members 1 and 1 and the inner frame-shaped auxiliary member 31. The inner frame-shaped auxiliary member 31 is fixed to the cylindrical metal members 1 and 1 by the temporary joining step.

内側本接合工程は、図16に示すように、本接合用回転ツールFを用いて第一突合せ部J1の内側から摩擦攪拌する工程である。内側本接合工程では、本接合用回転ツールFを用いて第一突合せ部J1の内側から摩擦攪拌を行う工程である。具体的な図示は省略するが、例えば、ロボットアームの先端に本接合用回転ツールFを取り付けておき、ロボットアームを筒状金属部材1の開口部から挿入することによって、第一突合せ部J1の内側から摩擦攪拌を行うことができる。内側本接合工程では、本接合用回転ツールFを内側枠状補助部材31の内周面31bから所定の深さで挿入する。内側本接合工程の本接合用回転ツールFの挿入深さは、本接合用回転ツールFが内側枠状補助部材31及び筒状金属部材1,1の両方に接触するように設定しているが、本接合用回転ツールFが内側枠状補助部材31のみに接触するように設定してもよい。   As shown in FIG. 16, the inner main joining step is a step of friction stirring from the inner side of the first abutting portion J <b> 1 using the main welding rotary tool F. The inner main joining step is a step of performing frictional stirring from the inner side of the first butting portion J1 using the main welding rotating tool F. Although not specifically illustrated, for example, by attaching the main welding rotary tool F to the tip of the robot arm and inserting the robot arm through the opening of the cylindrical metal member 1, the first butting portion J1 is inserted. Friction stirring can be performed from the inside. In the inner main joining step, the main joining rotary tool F is inserted from the inner peripheral surface 31b of the inner frame-shaped auxiliary member 31 at a predetermined depth. The insertion depth of the main joining rotary tool F in the inner main joining process is set so that the main joining rotary tool F contacts both the inner frame-shaped auxiliary member 31 and the cylindrical metal members 1, 1. Alternatively, the main rotation tool F may be set so as to contact only the inner frame-shaped auxiliary member 31.

そして、内側枠状補助部材31に対して本接合用回転ツールFを相対移動させて第一突合せ部J1の全長を摩擦攪拌する。本接合用回転ツールFの移動軌跡には内側塑性化領域W3が形成される。   Then, the main rotating tool F is moved relative to the inner frame-shaped auxiliary member 31 to frictionally stir the entire length of the first butting portion J1. An inner plasticizing region W3 is formed on the movement trajectory of the main rotating tool F for welding.

図17に示すように、第三実施形態では回転装置Rを用いて摩擦攪拌を行う。第三実施形態に係る内側本接合工程は、筒状金属部材1,1の内側から摩擦攪拌を行うことを除いては第一実施形態に係る外側本接合工程と略同等であるため詳細な説明は省略する。   As shown in FIG. 17, in the third embodiment, friction stirring is performed using a rotating device R. The inner main joining process according to the third embodiment is substantially the same as the outer main joining process according to the first embodiment except that the friction stir is performed from the inside of the cylindrical metal members 1, 1, so that detailed description will be given. Is omitted.

切除工程は、筒状金属部材1の内周面1cから突出する内側枠状補助部材31を切除する工程である。図18の(a)に示すように、内側本接合工程を行うと、内側枠状補助部材31の内周面31bには凹溝32が形成されるとともに、凹溝32の周囲にバリVが形成される。本実施形態では、ショルダ部で塑性流動化した金属を押さえないで内側本接合工程を行うため、摩擦攪拌によって形成される凹溝32が深くなる傾向にあるとともにバリVが多く発生しやすい。   The cutting step is a step of cutting the inner frame-shaped auxiliary member 31 protruding from the inner peripheral surface 1 c of the cylindrical metal member 1. As shown in FIG. 18A, when the inner main joining step is performed, a concave groove 32 is formed on the inner peripheral surface 31b of the inner frame-shaped auxiliary member 31, and burrs V are formed around the concave groove 32. It is formed. In the present embodiment, the inner main joining process is performed without pressing the plastic fluidized metal in the shoulder portion. Therefore, the concave grooves 32 formed by frictional stirring tend to be deep, and many burrs V are likely to occur.

内側本接合工程によって形成される凹溝32の底面32aは、筒状金属部材1の内周面1cよりも上方に位置している。内側枠状補助部材31の厚さや形状等は、内側本接合工程によって形成された凹溝32の底面32aが筒状金属部材1の内周面1cよりも上方に位置するように設定することが好ましい。   The bottom surface 32 a of the concave groove 32 formed by the inner main joining process is located above the inner peripheral surface 1 c of the cylindrical metal member 1. The thickness, shape, and the like of the inner frame-shaped auxiliary member 31 may be set so that the bottom surface 32a of the groove 32 formed by the inner main bonding process is located above the inner peripheral surface 1c of the cylindrical metal member 1. preferable.

切除工程は、本実施形態では、内側枠状補助部材31、バリV及び溶接金属W0を切除する。切除工程では、図18の(a)に示すように、筒状金属部材1の内周面1cを含む基準面に沿って、内側枠状補助部材31、バリV及び溶接金属W0を切除する。これにより、図18の(b)に示すように、筒状金属部材1の内周面1cと内側塑性化領域W3の表面とは面一になる。   In the cutting process, in this embodiment, the inner frame-shaped auxiliary member 31, the burr V, and the weld metal W0 are cut. In the cutting process, as shown in FIG. 18A, the inner frame-shaped auxiliary member 31, the burr V, and the weld metal W0 are cut along the reference surface including the inner peripheral surface 1c of the cylindrical metal member 1. Thereby, as shown in FIG. 18B, the inner peripheral surface 1c of the cylindrical metal member 1 and the surface of the inner plasticizing region W3 are flush with each other.

なお、切除工程では、筒状金属部材1の内周面1cを含む基準面よりも上方(凹溝32側)の位置で切除してもよい。つまり、切除工程では、筒状金属部材1の内周面1cから突出する内側枠状補助部材31の一部を切除するだけでもよい。また、切除工程は省略してもよい。   In the excision process, the cylindrical metal member 1 may be excised at a position above the reference surface including the inner peripheral surface 1c (on the concave groove 32 side). That is, in the cutting process, only a part of the inner frame-shaped auxiliary member 31 protruding from the inner peripheral surface 1c of the cylindrical metal member 1 may be cut off. The excision process may be omitted.

以上説明した本実施形態に係る摩擦攪拌接合方法では、筒状金属部材1,1及び内側枠状補助部材31の両方、又は、内側枠状補助部材31のみに攪拌ピンF2のみを接触した状態で摩擦攪拌を行うため、従来の方法よりも筒状金属部材1,1に作用する押圧力を低減することができる。これにより、筒状金属部材1,1の外側に塑性流動化した金属が流出するのを防ぐことができる。また、本接合用回転ツールFを挿入する側に枠状補助部材を設けることにより、摩擦攪拌による金属不足を補うことができる。   In the friction stir welding method according to the present embodiment described above, both the cylindrical metal members 1 and 1 and the inner frame auxiliary member 31 or only the inner frame auxiliary member 31 is in contact with only the stirring pin F2. Since frictional stirring is performed, the pressing force acting on the cylindrical metal members 1 and 1 can be reduced as compared with the conventional method. Thereby, it is possible to prevent the plastic fluidized metal from flowing out of the cylindrical metal members 1 and 1. Further, by providing the frame-shaped auxiliary member on the side where the main rotating tool F is inserted, the shortage of metal due to frictional stirring can be compensated.

また、切除工程を行うことで、筒状金属部材1,1の内周面1c,1cを平滑にすることができる。また、内側本接合工程を行う前に、内側枠状補助部材31と筒状金属部材1,1とを仮接合することで、筒状金属部材1,1に対して内側枠状補助部材31が固定されるため、内側本接合工程を安定して行うことができる。   Moreover, the internal peripheral surfaces 1c and 1c of the cylindrical metal members 1 and 1 can be smoothed by performing a cutting process. In addition, before the inner main joining step, the inner frame-shaped auxiliary member 31 and the cylindrical metal members 1, 1 are temporarily joined, so that the inner frame-shaped auxiliary member 31 is attached to the cylindrical metal members 1, 1. Since it is fixed, the inner main joining step can be performed stably.

以上本発明の第三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、第三実施形態では筒状金属部材1,1は円筒状を呈する部材であったが、他の形状であってもよい。具体的な図示は省略するが、図7を参照するように、第三実施形態に係る摩擦攪拌接合の筒状金属部材1,1及び内側枠状補助部材31を矩形筒状としてもよい。   Although the third embodiment of the present invention has been described above, design changes can be made as appropriate without departing from the spirit of the present invention. For example, in the third embodiment, the cylindrical metal members 1 and 1 are cylindrical members, but may have other shapes. Although specific illustration is omitted, as shown in FIG. 7, the cylindrical metal members 1, 1 and the inner frame-shaped auxiliary member 31 for friction stir welding according to the third embodiment may be rectangular.

[第四実施形態]
次に、本発明の第四実施形態に係る摩擦攪拌接合方法について説明する。第四実施形態に係る摩擦攪拌接合方法では、筒状金属部材1,1が突き合わされる部位に凹部を設ける点で第三実施形態と相違する。
[Fourth embodiment]
Next, a friction stir welding method according to a fourth embodiment of the present invention will be described. The friction stir welding method according to the fourth embodiment is different from the third embodiment in that a recess is provided in a portion where the cylindrical metal members 1 and 1 are abutted.

図19の(a)に示すように、筒状金属部材1,1は円筒状を呈する。筒状金属部材1,1の端部の内側には、段差部40がそれぞれ形成されている。段差部40は、段差端面40aと、段差端面40aに対して垂直な段差周面40bとで形成されている。図19の(b)に示すように、筒状金属部材1,1の端面1a,1a同士を突き合わせると、突合せ部J1が形成される。また、段差部40,40が突き合わされることにより、凹部42が形成される。凹部42は、筒状金属部材1,1の内側において、周方向に亘って形成される。   As shown in FIG. 19A, the cylindrical metal members 1, 1 have a cylindrical shape. Stepped portions 40 are respectively formed inside the end portions of the cylindrical metal members 1 and 1. The step portion 40 is formed by a step end surface 40a and a step peripheral surface 40b perpendicular to the step end surface 40a. As shown in FIG. 19B, when the end faces 1a, 1a of the cylindrical metal members 1, 1 are butted together, a butted portion J1 is formed. Moreover, the recessed part 42 is formed when the level | step-difference parts 40 and 40 are faced | matched. The recess 42 is formed in the circumferential direction inside the cylindrical metal members 1, 1.

内側枠状補助部材(枠状補助部材)41は、円筒状の金属部材である。内側枠状補助部材41の材料は特に制限されないが、本実施形態のように筒状金属部材1と同等であることが好ましい。内側枠状補助部材41の外周面41aは、段差周面40bと面接触するようになっている。内側枠状補助部材41の板厚は一定になっている。   The inner frame-shaped auxiliary member (frame-shaped auxiliary member) 41 is a cylindrical metal member. The material of the inner frame auxiliary member 41 is not particularly limited, but is preferably equivalent to the cylindrical metal member 1 as in the present embodiment. The outer peripheral surface 41a of the inner frame-shaped auxiliary member 41 is in surface contact with the stepped peripheral surface 40b. The plate thickness of the inner frame-shaped auxiliary member 41 is constant.

第四実施形態に係る摩擦攪拌接合方法では、突合せ工程と、仮接合工程と、内側本接合工程と、切除工程と、補修工程とを行う。   In the friction stir welding method according to the fourth embodiment, a butt process, a temporary bonding process, an inner main bonding process, a cutting process, and a repairing process are performed.

突合せ工程は、図19に示すように、筒状金属部材1,1の端面1a,1a同士を突き合わせるとともに、第一突合せ部J1の内周に形成された凹部42に内側枠状補助部材41を配置して第一突合せ部J1を覆う工程である。つまり、筒状金属部材1,1の端面1a,1a同士を突き合わせる際に、内側枠状補助部材41は凹部42に挟み込まれるように配置される。   As shown in FIG. 19, the butting step butts the end faces 1 a, 1 a of the cylindrical metal members 1, 1, and the inner frame-shaped auxiliary member 41 in the recess 42 formed on the inner periphery of the first butt portion J <b> 1. Is a step of covering the first butting portion J1. That is, the inner frame-shaped auxiliary member 41 is disposed so as to be sandwiched between the recesses 42 when the end surfaces 1 a and 1 a of the cylindrical metal members 1 and 1 are abutted with each other.

突合せ工程により、筒状金属部材1,1の外周面1b,1bが面一になるとともに内周面1c,1cが同一面上に位置する。また、図20に示すように、凹部42の底面を構成する段差周面40b,40bと内側枠状補助部材41の外周面41aとが面接触する。また、凹部42の側壁を構成する段差端面40a,40aと内側枠状補助部材41の側面41c,41cとが面接触する。   By the butting process, the outer peripheral surfaces 1b, 1b of the cylindrical metal members 1, 1 are flush with each other, and the inner peripheral surfaces 1c, 1c are located on the same surface. Further, as shown in FIG. 20, the step peripheral surfaces 40 b and 40 b constituting the bottom surface of the recess 42 and the outer peripheral surface 41 a of the inner frame-shaped auxiliary member 41 are in surface contact. Further, the step end surfaces 40a and 40a constituting the side wall of the recess 42 and the side surfaces 41c and 41c of the inner frame-shaped auxiliary member 41 are in surface contact.

仮接合工程は、図20に示すように、筒状金属部材1,1と内側枠状補助部材41とを仮接合する工程である。筒状金属部材1,1と内側枠状補助部材41との接合方法は特に制限されないが、本実施形態では溶接で接合している。筒状金属部材1,1と内側枠状補助部材41との入隅部には、溶接金属W0,W0が形成される。仮接合工程によって、筒状金属部材1,1に対して内側枠状補助部材41が固定される。   The temporary joining step is a step of temporarily joining the cylindrical metal members 1 and 1 and the inner frame-shaped auxiliary member 41 as shown in FIG. The method of joining the cylindrical metal members 1 and 1 and the inner frame-shaped auxiliary member 41 is not particularly limited, but in this embodiment, the joining is performed by welding. Weld metals W0, W0 are formed at the corners between the cylindrical metal members 1, 1 and the inner frame-shaped auxiliary member 41. The inner frame-shaped auxiliary member 41 is fixed to the cylindrical metal members 1 and 1 by the temporary joining step.

内側本接合工程は、図21に示すように、本接合用回転ツールFを用いて第一突合せ部J1の内側から摩擦攪拌を行う工程である。内側本接合工程では、本接合用回転ツールFを内側枠状補助部材41の内周面41bから所定の深さで挿入する。そして、内側枠状補助部材41に対して本接合用回転ツールFを相対移動させて第一突合せ部J1の全長を摩擦攪拌する。第四実施形態に係る内側本接合工程は、第三実施形態に係る内側本接合工程と略同等であるため詳細な説明は省略する。   As shown in FIG. 21, the inner main joining step is a step of performing frictional stirring from the inner side of the first butting portion J1 using the main welding rotating tool F. In the inner main joining step, the main joining rotary tool F is inserted from the inner peripheral surface 41b of the inner frame-shaped auxiliary member 41 at a predetermined depth. Then, the main welding rotary tool F is moved relative to the inner frame-shaped auxiliary member 41 to frictionally stir the entire length of the first butting portion J1. Since the inner main joining process according to the fourth embodiment is substantially the same as the inner main joining process according to the third embodiment, detailed description thereof is omitted.

切除工程は、本実施形態では、内側枠状補助部材41、バリV及び溶接金属W0を切除する。切除工程では、図21に示すように、筒状金属部材1の内周面1cを含む基準面に沿って、内側枠状補助部材41、バリV及び溶接金属W0を切除する。これにより、図22に示すように、筒状金属部材1の内周面1cと内側塑性化領域W3の表面とは面一になる。   In the cutting process, in this embodiment, the inner frame-shaped auxiliary member 41, the burr V, and the weld metal W0 are cut. In the cutting process, as shown in FIG. 21, the inner frame-shaped auxiliary member 41, the burr V, and the weld metal W0 are cut along the reference plane including the inner peripheral surface 1c of the cylindrical metal member 1. Thereby, as shown in FIG. 22, the inner peripheral surface 1c of the cylindrical metal member 1 and the surface of the inner plasticizing region W3 are flush with each other.

なお、切除工程では、筒状金属部材1の内周面1cを含む基準面よりも上方の位置で切除してもよい。つまり、切除工程では、筒状金属部材1の内周面1cから突出する内側枠状補助部材41の一部を切除するだけでもよい。また、切除工程は省略してもよい。   In the excision process, the cylindrical metal member 1 may be excised at a position above the reference surface including the inner peripheral surface 1c. That is, in the cutting process, only a part of the inner frame-shaped auxiliary member 41 protruding from the inner peripheral surface 1c of the cylindrical metal member 1 may be cut. The excision process may be omitted.

補修工程は、第二突合せ部J2,J2に対して摩擦攪拌接合を行う工程である。本実施形態では、第二実施形態の補修工程とは異なり、図22に示すように、小型回転ツールGの攪拌ピンG2のみを第二突合せ部J2,J2に接触させた状態で摩擦攪拌を行う。本実施形態では、筒状金属部材1の内周面1cにおける第二突合せ部J2,J2に対して摩擦攪拌を行うため、仮に小型回転ツールGのショルダ部G1を筒状金属部材1の内周面1cに接触させると小型回転ツールGと筒状金属部材1との相対移動が阻害されて、摩擦攪拌を円滑に実行できなくなるおそれがある。なお、小型回転ツールGに替えて本接合用回転ツールFを用いて、攪拌ピンF2のみを第二突合せ部J2,J2に接触させた状態で補修工程を行ってもよい。   The repair process is a process of performing friction stir welding on the second butted portions J2 and J2. In the present embodiment, unlike the repair process of the second embodiment, as shown in FIG. 22, the friction stir is performed with only the stirring pin G2 of the small rotary tool G in contact with the second butting portions J2 and J2. . In the present embodiment, the frictional stirring is performed on the second butted portions J <b> 2 and J <b> 2 on the inner peripheral surface 1 c of the cylindrical metal member 1, so that the shoulder G <b> 1 of the small rotating tool G is temporarily connected to the inner periphery of the cylindrical metal member 1. If it is brought into contact with the surface 1c, the relative movement between the small rotary tool G and the cylindrical metal member 1 is hindered, and there is a possibility that the friction stirring cannot be performed smoothly. Note that the repairing process may be performed in a state where only the stirring pin F2 is in contact with the second butting portions J2 and J2, using the main rotating tool F instead of the small rotating tool G.

以上説明した第四実施形態に係る摩擦攪拌接合によっても第三実施形態と略同等の効果を得ることができる。また、凹部42を設けることにより、筒状金属部材1,1に対する内側枠状補助部材41の位置決めを容易に行うことができるとともに、内側本接合工程を安定して行うことができる。また、本実施形態では、凹部42に内側枠状補助部材41を配置するとともに仮接合工程を行うため、より安定して内側本接合工程を行うことができる。   Also by the friction stir welding according to the fourth embodiment described above, substantially the same effect as that of the third embodiment can be obtained. Moreover, by providing the recessed part 42, while positioning the inner side frame-shaped auxiliary member 41 with respect to the cylindrical metal members 1 and 1, an inner side main joining process can be performed stably. Moreover, in this embodiment, since the inner side frame-shaped auxiliary member 41 is arrange | positioned in the recessed part 42, and a temporary joining process is performed, an inner side main joining process can be performed more stably.

また、補修工程を行うことで、内側枠状補助部材41と筒状金属部材1,1とが突き合わされて形成された第二突合せ部J2,J2が摩擦攪拌される。これにより、筒状金属部材1,1の水密性及び気密性を向上させることができる。また、本実施形態のように仮接合工程を溶接によって行う場合、切除工程を行うと筒状金属部材1の内周面1cが変色していたり、改質したりする場合があるが、補修工程を行うことでこれらの変色箇所や改質箇所等の接合痕を補修することができる。   Further, by performing the repairing process, the second butted portions J2 and J2 formed by abutting the inner frame-shaped auxiliary member 41 and the cylindrical metal members 1 and 1 are friction-stirred. Thereby, the watertightness and airtightness of the cylindrical metal members 1 and 1 can be improved. Moreover, when performing a temporary joining process by welding like this embodiment, when the excision process is performed, the inner peripheral surface 1c of the cylindrical metal member 1 may be discolored or modified, but the repair process It is possible to repair joint marks such as discolored portions and modified portions.

以上本発明の第四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、第四実施形態では筒状金属部材1,1は円筒状を呈する部材であったが、他の形状であってもよい。具体的な図示は省略するが、図13を参照するように、第四実施形態に係る摩擦攪拌接合の筒状金属部材1,1及び内側枠状補助部材41を矩形筒状としてもよい。   Although the fourth embodiment of the present invention has been described above, design changes can be made as appropriate without departing from the spirit of the present invention. For example, in the fourth embodiment, the cylindrical metal members 1 and 1 are cylindrical members, but may have other shapes. Although specific illustration is omitted, as shown in FIG. 13, the cylindrical metal members 1, 1 and the inner frame-shaped auxiliary member 41 of the friction stir welding according to the fourth embodiment may be rectangular.

[第五実施形態]
次に、本発明の第五実施形態に係る摩擦攪拌接合方法について説明する。第五実施形態に係る摩擦攪拌接合方法は、筒状金属部材1,1の外側及び内側の両方から第一突合せ部J1に対して摩擦攪拌接合を行う点で第一実施形態と相違する。第五実施形態に係る摩擦攪拌接合方法では、特徴的な部分を中心に説明する。
[Fifth embodiment]
Next, a friction stir welding method according to the fifth embodiment of the present invention will be described. The friction stir welding method according to the fifth embodiment is different from the first embodiment in that friction stir welding is performed on the first butted portion J1 from both the outside and the inside of the cylindrical metal members 1 and 1. The friction stir welding method according to the fifth embodiment will be described focusing on characteristic portions.

第五実施形態に係る摩擦攪拌接合方法では、突合せ工程と、仮接合工程と、外側本接合工程と、内側本接合工程と、切除工程とを行う。   In the friction stir welding method according to the fifth embodiment, a butt process, a temporary bonding process, an outer main bonding process, an inner main bonding process, and a cutting process are performed.

突合せ工程では、図23に示すように、筒状金属部材1,1の端面1a,1a同士を突き合わせる。また、突合せ工程では、第一突合せ部J1の外側に外側枠状補助部材11を配置するとともに、内側に内側枠状補助部材31を配置する。   In the butting process, as shown in FIG. 23, the end surfaces 1a and 1a of the cylindrical metal members 1 and 1 are butted together. In the butting step, the outer frame-shaped auxiliary member 11 is disposed outside the first butting portion J1, and the inner frame-shaped auxiliary member 31 is disposed inside.

仮接合工程では、筒状金属部材1,1と外側枠状補助部材11とを溶接で仮接合する。また、仮接合工程では、筒状金属部材1,1と内側枠状補助部材31とを溶接で仮接合する。   In the temporary joining step, the cylindrical metal members 1 and 1 and the outer frame auxiliary member 11 are temporarily joined by welding. In the temporary joining step, the cylindrical metal members 1 and 1 and the inner frame-shaped auxiliary member 31 are temporarily joined by welding.

外側本接合工程は、第一実施形態に係る外側本接合工程と略同等である。外側本接合工程によって、外側塑性化領域W1が形成される。   The outer main bonding process is substantially the same as the outer main bonding process according to the first embodiment. The outer plasticizing region W1 is formed by the outer main joining process.

内側本接合工程は、第三実施形態に係る内側本接合工程と略同等である。内側本接合工程によって、内側塑性化領域W3が形成される。内側本接合工程では、本接合用回転ツールFの挿入深さを、その先端が外側塑性化領域W1に入り込むように設定する。これにより、外側塑性化領域W1と内側塑性化領域W3とが重複する。   The inner main joining step is substantially equivalent to the inner main joining step according to the third embodiment. The inner plasticizing region W3 is formed by the inner main joining step. In the inner main joining process, the insertion depth of the main welding rotary tool F is set so that the tip thereof enters the outer plasticizing region W1. Thereby, the outer plasticizing region W1 and the inner plasticizing region W3 overlap.

切除工程では、筒状金属部材1の外周面1bら突出する外側枠状補助部材11を切除するとともに、筒状金属部材1の内周面1cから突出する内側枠状補助部材31を切除する工程である。   In the cutting process, the outer frame auxiliary member 11 protruding from the outer peripheral surface 1b of the cylindrical metal member 1 is cut out, and the inner frame auxiliary member 31 protruding from the inner peripheral surface 1c of the cylindrical metal member 1 is cut out. It is.

以上説明した第五実施形態に係る摩擦攪拌接合方法によれば、外側塑性化領域W1と内側塑性化領域W3とを重複させることができるため、第一突合せ部J1の深さ方向の全体が摩擦攪拌される。これにより、筒状金属部材1,1の水密性及び気密性を高めることができる。   According to the friction stir welding method according to the fifth embodiment described above, the outer plasticized region W1 and the inner plasticized region W3 can be overlapped, so that the entire depth direction of the first butted portion J1 is frictional. Stir. Thereby, the watertightness and airtightness of the cylindrical metal members 1 and 1 can be improved.

また、外側本接合工程及び内側本接合工程は、どちらを先に行ってもよい。第五実施形態では、外側本接合工程を行うときは、内側枠状補助部材31が裏当て材として機能する。また、内側本接合工程を行うときは、外側枠状補助部材11が裏当て材として機能する。   In addition, either the outer main bonding step or the inner main bonding step may be performed first. In the fifth embodiment, when the outer main joining step is performed, the inner frame-shaped auxiliary member 31 functions as a backing material. Moreover, when performing an inner side main joining process, the outer side frame-shaped auxiliary member 11 functions as a backing material.

[第六実施形態]
次に、本発明の第六実施形態に係る摩擦攪拌接合方法について説明する。第六実施形態に係る摩擦攪拌接合方法は、筒状金属部材1,1の突合せ部J1に凹部30,42を設けるとともに、当該凹部30に外側枠状補助部材21を配置し、当該凹部42に内側枠状補助部材41を配置する点で第五実施形態と相違する。第六実施形態に係る摩擦攪拌接合方法では、特徴的な部分を中心に説明する。
[Sixth embodiment]
Next, a friction stir welding method according to the sixth embodiment of the present invention will be described. In the friction stir welding method according to the sixth embodiment, the recesses 30 and 42 are provided in the abutting portion J1 of the cylindrical metal members 1 and 1, the outer frame-shaped auxiliary member 21 is disposed in the recess 30, and The fifth embodiment is different from the fifth embodiment in that the inner frame-shaped auxiliary member 41 is arranged. The friction stir welding method according to the sixth embodiment will be described focusing on characteristic portions.

第六実施形態に係る摩擦攪拌接合方法では、突合せ工程と、仮接合工程と、外側本接合工程と、内側本接合工程と、切除工程と、補修工程とを行う。   In the friction stir welding method according to the sixth embodiment, a butt process, a temporary bonding process, an outer main bonding process, an inner main bonding process, an excision process, and a repair process are performed.

突合せ工程では、図24に示すように、筒状金属部材1,1の端面同士を突き合わせる。また、突合せ工程では、第一突合せ部J1の外側に形成された凹部30に外側枠状補助部材21を配置するとともに、内側に形成された凹部42に内側枠状補助部材41を配置する。   In the butting process, as shown in FIG. 24, the end faces of the cylindrical metal members 1 and 1 are butted together. In the butting step, the outer frame-shaped auxiliary member 21 is disposed in the recess 30 formed outside the first butting portion J1, and the inner frame-shaped auxiliary member 41 is disposed in the recess 42 formed inside.

仮接合工程では、筒状金属部材1,1と外側枠状補助部材21とを溶接で仮接合する。また、仮接合工程では、筒状金属部材1,1と内側枠状補助部材41とを溶接で仮接合する。   In the temporary joining step, the tubular metal members 1, 1 and the outer frame-shaped auxiliary member 21 are temporarily joined by welding. In the temporary joining step, the tubular metal members 1 and 1 and the inner frame auxiliary member 41 are temporarily joined by welding.

外側本接合工程は、第二実施形態に係る外側本接合工程と略同等である。外側本接合工程によって、外側塑性化領域W1が形成される。   The outer main bonding process is substantially the same as the outer main bonding process according to the second embodiment. The outer plasticizing region W1 is formed by the outer main joining process.

内側本接合工程は、第四実施形態に係る内側本接合工程と略同等である。内側本接合工程によって、内側塑性化領域W3が形成される。内側本接合工程では、本接合用回転ツールFの挿入深さを、その先端が外側塑性化領域W1に入り込むように設定する。これにより、外側塑性化領域W1と内側塑性化領域W3とが重複する。   The inner main bonding process is substantially the same as the inner main bonding process according to the fourth embodiment. The inner plasticizing region W3 is formed by the inner main joining step. In the inner main joining process, the insertion depth of the main welding rotary tool F is set so that the tip thereof enters the outer plasticizing region W1. Thereby, the outer plasticizing region W1 and the inner plasticizing region W3 overlap.

切除工程では、筒状金属部材1の外周面1bら突出する外側枠状補助部材21を切除するとともに、筒状金属部材1の内周面1cから突出する内側枠状補助部材41を切除する工程である。   In the cutting step, the outer frame-shaped auxiliary member 21 protruding from the outer peripheral surface 1b of the cylindrical metal member 1 and the inner frame-shaped auxiliary member 41 protruding from the inner peripheral surface 1c of the cylindrical metal member 1 are cut off. It is.

補修工程では、切除工程によって露出する第二突合せ部J2,J2(図12,22参照)に対して摩擦攪拌接合を行う工程である。   In the repair process, friction stir welding is performed on the second butted portions J2 and J2 (see FIGS. 12 and 22) exposed in the cutting process.

以上説明した第六実施形態に係る摩擦攪拌接合方法によれば、外側塑性化領域W1と内側塑性化領域W3とを重複させることができるため、第一突合せ部J1の深さ方向の全体が摩擦攪拌される。これにより、筒状金属部材1,1の水密性及び気密性を高めることができる。また、凹部30,42を設けることで、外側枠状補助部材21及び内側枠状補助部材41の位置決めが容易となる。   According to the friction stir welding method according to the sixth embodiment described above, since the outer plasticized region W1 and the inner plasticized region W3 can be overlapped, the entire depth direction of the first butted portion J1 is frictional. Stir. Thereby, the watertightness and airtightness of the cylindrical metal members 1 and 1 can be improved. Further, by providing the recesses 30 and 42, the outer frame-shaped auxiliary member 21 and the inner frame-shaped auxiliary member 41 can be easily positioned.

また、外側本接合工程及び内側本接合工程は、どちらを先に行ってもよい。第六実施形態では、外側本接合工程を行うときは、内側枠状補助部材41が裏当て材として機能する。また、内側本接合工程を行うときは、外側枠状補助部材21が裏当て材として機能する。   In addition, either the outer main bonding step or the inner main bonding step may be performed first. In 6th embodiment, when performing an outer side final joining process, the inner side frame-shaped auxiliary member 41 functions as a backing material. Moreover, when performing an inner side main joining process, the outer side frame-shaped auxiliary member 21 functions as a backing material.

1 筒状金属部材
1a 端面
1b 外周面
1c 内周面
10 段差部
11 外側枠状補助部材
21 外側枠状補助部材
31 内側枠状補助部材
30 凹部
40 段差部
41 内側枠状補助部材
42 凹部
J1 第一突合せ部
J2 第二突合せ部
F 本接合用回転ツール
F1 連結部
F2 攪拌ピン
H 小型回転ツール
W1 外側塑性化領域
W2 塑性化領域
W3 内側塑性化領域
DESCRIPTION OF SYMBOLS 1 Cylindrical metal member 1a End surface 1b Outer peripheral surface 1c Inner peripheral surface 10 Stepped part 11 Outer frame-shaped auxiliary member 21 Outer frame-shaped auxiliary member 31 Inner frame-shaped auxiliary member 30 Recessed part 40 Stepped part 41 Inner frame-shaped auxiliary member 42 Recessed part J1 1st One butting part J2 Second butting part F Rotary tool for main joining F1 Connecting part F2 Stirring pin H Small rotating tool W1 Outer plasticizing region W2 Plasticizing region W3 Inner plasticizing region

Claims (9)

攪拌ピンを備えた回転ツールを用いて二つの筒状金属部材を接合する摩擦攪拌接合方法であって、
前記筒状金属部材の端面同士を突き合わせるとともに、突合せ部の外周に枠状補助部材を配置して前記突合せ部を覆う突合せ工程と、
前記枠状補助部材の外周面から回転した前記攪拌ピンを挿入し、前記枠状補助部材及び前記両筒状金属部材、又は、前記枠状補助部材のみに前記攪拌ピンのみを接触させた状態で前記突合せ部を摩擦攪拌する外側本接合工程と、を含むことを特徴とする摩擦攪拌接合方法。
A friction stir welding method for joining two cylindrical metal members using a rotary tool equipped with a stirring pin,
Abutting step of abutting the end faces of the cylindrical metal member and placing a frame-shaped auxiliary member on the outer periphery of the abutting part to cover the abutting part;
In a state where the stirring pin rotated from the outer peripheral surface of the frame-shaped auxiliary member is inserted and only the stirring pin is in contact with only the frame-shaped auxiliary member and both the cylindrical metal members or the frame-shaped auxiliary member. A friction stir welding method comprising: an outer main joining step of friction stir the butt portion.
前記外側本接合工程後に、前記筒状金属部材の外周面から突出する前記枠状補助部材を切除する切除工程を含むことを特徴とする請求項1に記載の摩擦攪拌接合方法。   2. The friction stir welding method according to claim 1, further comprising a cutting step of cutting the frame-shaped auxiliary member protruding from the outer peripheral surface of the cylindrical metal member after the outer main bonding step. 前記外側本接合工程を行う前に、前記枠状補助部材と前記筒状金属部材とを仮接合する仮接合工程を含むことを特徴とする請求項1又は請求項2に記載の摩擦攪拌接合方法。   The friction stir welding method according to claim 1, further comprising a temporary joining step of temporarily joining the frame-shaped auxiliary member and the cylindrical metal member before performing the outer main joining step. . 攪拌ピンを備えた回転ツールを用いて二つの筒状金属部材を接合する摩擦攪拌接合方法であって、
前記筒状金属部材の端面同士を突き合わせるとともに、突合せ部の内周に枠状補助部材を配置して前記突合せ部を覆う突合せ工程と、
前記枠状補助部材の内周面から回転した前記攪拌ピンを挿入し、前記枠状補助部材及び前記両筒状金属部材、又は、前記枠状補助部材のみに前記攪拌ピンのみを接触させた状態で前記突合せ部を摩擦攪拌する内側本接合工程と、を含むことを特徴とする摩擦攪拌接合方法。
A friction stir welding method for joining two cylindrical metal members using a rotary tool equipped with a stirring pin,
While abutting the end surfaces of the cylindrical metal member, a butting step of covering the butting portion by placing a frame-shaped auxiliary member on the inner periphery of the butting portion,
The stirring pin rotated from the inner peripheral surface of the frame-shaped auxiliary member is inserted, and only the stirring pin is brought into contact with the frame-shaped auxiliary member and both the cylindrical metal members, or only the frame-shaped auxiliary member A friction stir welding method comprising: an inner main joining step of friction stir the butt portion.
前記内側本接合工程後に、前記筒状金属部材の内周面から突出する前記枠状補助部材を切除する切除工程を含むことを特徴とする請求項4に記載の摩擦攪拌接合方法。   5. The friction stir welding method according to claim 4, further comprising a cutting step of cutting the frame-shaped auxiliary member protruding from the inner peripheral surface of the cylindrical metal member after the inner main bonding step. 前記内側本接合工程を行う前に、前記枠状補助部材と前記筒状金属部材とを仮接合する仮接合工程を含むことを特徴とする請求項4又は請求項5に記載の摩擦攪拌接合方法。   The friction stir welding method according to claim 4 or 5, further comprising a temporary joining step of temporarily joining the frame-shaped auxiliary member and the cylindrical metal member before performing the inner main joining step. . 前記突合せ工程では、前記突合せ部に形成された凹部に、前記凹部の深さよりも大きな厚さの前記枠状補助部材を配置することを特徴とする請求項1乃至請求項6のいずれか一項に記載の摩擦攪拌接合方法。   7. The frame-shaped auxiliary member having a thickness larger than the depth of the concave portion is disposed in the concave portion formed in the butt portion in the butting step. The friction stir welding method according to 1. 前記凹部の両側壁と前記枠状補助部材との一対の突合せ部に対してそれぞれ摩擦攪拌を行うことを特徴とする請求項7に記載の摩擦攪拌接合方法。   The friction stir welding method according to claim 7, wherein friction stir is performed on each of a pair of butted portions of both side walls of the recess and the frame-shaped auxiliary member. 攪拌ピンを備えた回転ツールを用いて二つの筒状金属部材を接合する摩擦攪拌接合方法であって、
前記筒状金属部材の端面同士を突き合わせるとともに、突合せ部の外周及び内周にそれぞれ枠状補助部材を配置して前記突合せ部を覆う突合せ工程と、
前記枠状補助部材の外周面から回転した前記攪拌ピンを挿入し、前記枠状補助部材及び前記両筒状金属部材、又は、前記枠状補助部材のみに前記攪拌ピンのみを接触させた状態で前記突合せ部を摩擦攪拌する外側本接合工程と、
前記枠状補助部材の内周面から回転した前記攪拌ピンを挿入し、前記枠状補助部材及び前記両筒状金属部材、又は、前記枠状補助部材のみに前記攪拌ピンのみを接触させた状態で前記突合せ部を摩擦攪拌する内側本接合工程と、を含み、
前記外側本接合工程で形成された塑性化領域と、前記内側本接合工程で形成された塑性化領域とを重複させることを特徴とする摩擦攪拌接合方法。
A friction stir welding method for joining two cylindrical metal members using a rotary tool equipped with a stirring pin,
Abutting step of abutting the end faces of the cylindrical metal member, and placing a frame-shaped auxiliary member on the outer periphery and the inner periphery of the abutting part to cover the abutting part,
In a state where the stirring pin rotated from the outer peripheral surface of the frame-shaped auxiliary member is inserted and only the stirring pin is in contact with only the frame-shaped auxiliary member and both the cylindrical metal members or the frame-shaped auxiliary member. An outer main joining step in which the butt portion is frictionally stirred;
The stirring pin rotated from the inner peripheral surface of the frame-shaped auxiliary member is inserted, and only the stirring pin is brought into contact with the frame-shaped auxiliary member and both the cylindrical metal members, or only the frame-shaped auxiliary member And an inner main joining step in which the butt portion is frictionally stirred.
A friction stir welding method, wherein the plasticized region formed in the outer main joining step and the plasticized region formed in the inner main joining step are overlapped.
JP2014212247A 2014-10-17 2014-10-17 Friction stir welding method Active JP6287751B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014212247A JP6287751B2 (en) 2014-10-17 2014-10-17 Friction stir welding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014212247A JP6287751B2 (en) 2014-10-17 2014-10-17 Friction stir welding method

Publications (2)

Publication Number Publication Date
JP2016078081A true JP2016078081A (en) 2016-05-16
JP6287751B2 JP6287751B2 (en) 2018-03-07

Family

ID=55957081

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2014212247A Active JP6287751B2 (en) 2014-10-17 2014-10-17 Friction stir welding method

Country Status (1)

Country Link
JP (1) JP6287751B2 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017140649A (en) * 2016-02-09 2017-08-17 日本軽金属株式会社 Joining method
JP2017225980A (en) * 2016-06-20 2017-12-28 日本軽金属株式会社 Joining method
WO2017221684A1 (en) * 2016-06-20 2017-12-28 日本軽金属株式会社 Joining method
JP2018069325A (en) * 2016-11-04 2018-05-10 日本軽金属株式会社 Joining method
WO2018084073A1 (en) * 2016-11-04 2018-05-11 日本軽金属株式会社 Joining method
JP2018126766A (en) * 2017-02-08 2018-08-16 日本軽金属株式会社 Jointing method
JP2018134669A (en) * 2017-02-22 2018-08-30 日本軽金属株式会社 Joining method
JP2018176205A (en) * 2017-04-10 2018-11-15 日本軽金属株式会社 Joining method
JP2018187671A (en) * 2017-05-11 2018-11-29 日本軽金属株式会社 Joining method
JP2018187672A (en) * 2017-05-11 2018-11-29 日本軽金属株式会社 Joining method
JP2019010673A (en) * 2017-07-03 2019-01-24 日本軽金属株式会社 Joining method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108698158A (en) * 2016-02-09 2018-10-23 日本轻金属株式会社 Joint method
US11759883B2 (en) 2020-01-22 2023-09-19 Ford Global Technologies, Llc Inserts to enable friction stir welding joints and methods of forming friction stir welded assemblies

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5178761A (en) * 1974-12-02 1976-07-08 Welding Inst
JPS62279082A (en) * 1986-05-28 1987-12-03 Toshiba Eng & Constr Co Ltd Automatic arc welding method for pipe
JPH09309164A (en) * 1996-03-19 1997-12-02 Hitachi Ltd Panel structure, friction bonding method and panel
JP2002137070A (en) * 2000-10-27 2002-05-14 Hitachi Ltd Composite machining device and friction stir welding method
US20030192941A1 (en) * 2002-04-16 2003-10-16 Ryooji Ishida Method and apparatus for friction stir welding
JP2003322135A (en) * 2002-04-26 2003-11-14 Showa Denko Kk Propeller shaft and manufacturing method thereof
JP2004106037A (en) * 2002-09-20 2004-04-08 Hitachi Ltd Method for bonding metal
WO2004043642A1 (en) * 2002-11-13 2004-05-27 Nippon Light Metal Co., Ltd. Method for joining aluminum powder alloy
US20100297469A1 (en) * 1996-03-19 2010-11-25 Kinya Aota Method of joining two members by friction stir welding
JP2012228731A (en) * 2011-04-05 2012-11-22 General Electric Co <Ge> Welding process for large structure
JP2013039613A (en) * 2011-08-19 2013-02-28 Nippon Light Metal Co Ltd Friction stir welding method
US20150290739A1 (en) * 2011-08-19 2015-10-15 Nippon Light Metal Company, Ltd. Friction stir welding method

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5178761A (en) * 1974-12-02 1976-07-08 Welding Inst
JPS62279082A (en) * 1986-05-28 1987-12-03 Toshiba Eng & Constr Co Ltd Automatic arc welding method for pipe
JPH09309164A (en) * 1996-03-19 1997-12-02 Hitachi Ltd Panel structure, friction bonding method and panel
US20100297469A1 (en) * 1996-03-19 2010-11-25 Kinya Aota Method of joining two members by friction stir welding
JP2002137070A (en) * 2000-10-27 2002-05-14 Hitachi Ltd Composite machining device and friction stir welding method
US20020193217A1 (en) * 2000-10-27 2002-12-19 Fumio Yoshinaga Compound machining device
JP2003311439A (en) * 2002-04-16 2003-11-05 Hitachi Ltd Friction stirring welding method and apparatus
US20030192941A1 (en) * 2002-04-16 2003-10-16 Ryooji Ishida Method and apparatus for friction stir welding
JP2003322135A (en) * 2002-04-26 2003-11-14 Showa Denko Kk Propeller shaft and manufacturing method thereof
JP2004106037A (en) * 2002-09-20 2004-04-08 Hitachi Ltd Method for bonding metal
WO2004043642A1 (en) * 2002-11-13 2004-05-27 Nippon Light Metal Co., Ltd. Method for joining aluminum powder alloy
US20060108394A1 (en) * 2002-11-13 2006-05-25 Shigeru Okaniwa Method for joining aluminum power alloy
JP2012228731A (en) * 2011-04-05 2012-11-22 General Electric Co <Ge> Welding process for large structure
JP2013039613A (en) * 2011-08-19 2013-02-28 Nippon Light Metal Co Ltd Friction stir welding method
US20150290739A1 (en) * 2011-08-19 2015-10-15 Nippon Light Metal Company, Ltd. Friction stir welding method

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017140649A (en) * 2016-02-09 2017-08-17 日本軽金属株式会社 Joining method
CN108430687A (en) * 2016-06-20 2018-08-21 日本轻金属株式会社 Joint method
JP2017225980A (en) * 2016-06-20 2017-12-28 日本軽金属株式会社 Joining method
WO2017221684A1 (en) * 2016-06-20 2017-12-28 日本軽金属株式会社 Joining method
CN108430687B (en) * 2016-06-20 2020-10-27 日本轻金属株式会社 Bonding method
JP2018069325A (en) * 2016-11-04 2018-05-10 日本軽金属株式会社 Joining method
CN109562484A (en) * 2016-11-04 2019-04-02 日本轻金属株式会社 Joint method
WO2018084073A1 (en) * 2016-11-04 2018-05-11 日本軽金属株式会社 Joining method
CN109562484B (en) * 2016-11-04 2021-08-17 日本轻金属株式会社 Bonding method
JP2018126766A (en) * 2017-02-08 2018-08-16 日本軽金属株式会社 Jointing method
JP2018134669A (en) * 2017-02-22 2018-08-30 日本軽金属株式会社 Joining method
JP2018176205A (en) * 2017-04-10 2018-11-15 日本軽金属株式会社 Joining method
JP2018187671A (en) * 2017-05-11 2018-11-29 日本軽金属株式会社 Joining method
JP2018187672A (en) * 2017-05-11 2018-11-29 日本軽金属株式会社 Joining method
JP2019010673A (en) * 2017-07-03 2019-01-24 日本軽金属株式会社 Joining method

Also Published As

Publication number Publication date
JP6287751B2 (en) 2018-03-07

Similar Documents

Publication Publication Date Title
JP6287751B2 (en) Friction stir welding method
JP6248790B2 (en) Friction stir welding method
US10906127B2 (en) Friction stir welding method
JP6052237B2 (en) Friction stir welding method
JP2016078087A (en) Joining method
CN113165104A (en) Method for manufacturing liquid-cooled jacket and friction stir welding method
WO2009081731A1 (en) Joining method
JP2019037986A (en) Manufacturing method of liquid-cooled jacket
WO2020208844A1 (en) Joining method
JP2015131322A (en) friction stir welding method
JP2018039017A (en) Joining method
JP2018065164A (en) Method of manufacturing hollow vessel
WO2019021501A1 (en) Joining method
JP6699530B2 (en) Joining method
JP2017121639A (en) Welding method
WO2020059198A1 (en) Method for producing liquid-cooling jacket
WO2019198290A1 (en) Method for manufacturing heat transfer plate
JP2015139799A (en) Frictional agitation joining method
JP2008194732A (en) Jointing method
JP2015116593A (en) Joint method
JP2009172650A (en) Manufacturing method of joined structure
JP2019000880A (en) Junction method
JP2018051563A (en) Joint method
JP2018086674A (en) Junction method
JP2019025489A (en) Joining method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20170224

TRDD Decision of grant or rejection written
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20171227

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20180109

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20180122

R150 Certificate of patent or registration of utility model

Ref document number: 6287751

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350