WO2018084073A1

WO2018084073A1 - Joining method

Info

Publication number: WO2018084073A1
Application number: PCT/JP2017/038804
Authority: WO
Inventors: 堀　久司; 伸城瀬尾
Original assignee: 日本軽金属株式会社
Priority date: 2016-11-04
Filing date: 2017-10-26
Publication date: 2018-05-11
Also published as: CN109562484B; CN109562484A

Abstract

Provided is a joining method whereby metal deficiency in a joint can be prevented. A joining method for joining together metal members (10, 20), the joining method including: a step for placing an other-side surface (11b) of a vertical plate (11) of a first metal member and an other-side surface (21b) of a vertical plate (21) of a second metal member (20) against each other and forming a proximal-end butted part (J1), the first metal member (10) and the second metal member (20) being formed having an L-shaped cross-sectional shape; a step for disposing an auxiliary member (30) on both metal members (10, 20) so as to cover the proximal-end butted part (J1); a step for moving a rotary tool (F) in a state in which only a stirring pin (F2) is in contact with the auxiliary member (30) and both metal members (10, 20), and performing friction stir welding of the auxiliary member (30) and both metal members (10, 20); and a step for removing the auxiliary member (30) on which flash has formed from both metal members (10, 20).

Description

Joining method

The present invention relates to a joining method for joining metal members by friction stir.

For example, Patent Document 1 discloses a joining method in which a first metal member and a second metal member are joined by friction stirring. In the joining method, after the first metal member and the second metal member are butted together to form a butted portion, only the stirring pin of the rotary tool is brought into contact with the first metal member and the second metal member. On the other hand, friction stirring is performed.

JP 2013-039613 A

In the conventional joining method described above, since the plastic fluidized metal is not pressed by the shoulder portion of the rotary tool, there is a problem that the plastic fluidized metal leaks to the outside and the joint becomes insufficient.

Therefore, an object of the present invention is to provide a joining method that can prevent metal shortage at the joint.

The present invention for solving the above-mentioned problems is a joining method for joining a first metal member and a second metal member by friction stirring using a main welding rotary tool having a stirring pin, the first metal The member and the second metal member are formed in a cross-sectional L shape in which a horizontal plate protrudes from a base end portion of one side surface of the vertical plate, and the other side surface of the vertical plate of the first metal member; The first metal member and the second metal member are covered with a butting step of forming a butting portion by butting the other side surface of the vertical plate of the second metal member, and covering the butting portion on the base end side. Auxiliary member arranging step of arranging an auxiliary member, and the stirring pin inserted from the surface side of the auxiliary member, and only the stirring pin is in contact with the auxiliary member, the first metal member, and the second metal member And along the abutting portion on the base end side, A main joining step of performing a friction stir welding of the auxiliary member, the first metal member, and the second metal member by moving a rotating tool for joining, and the auxiliary member formed with burrs as the first metal member and And a removing step of removing from the second metal member.

The present invention is also a joining method for joining the first metal member and the second metal member by friction stirring using a main welding rotary tool provided with a stirring pin, the first metal member and the second metal member. The metal member is formed in an L-shaped cross section in which a horizontal plate protrudes from a base end portion of one side surface of the vertical plate, the other side surface of the vertical plate of the first metal member, and the second metal member A butting step of butting the other side surface of the vertical plate to form a butting portion, and an auxiliary member for arranging the auxiliary member on the first metal member or the second metal member along the butting portion on the base end side In the member arranging step, the stirring pin is inserted from the surface side of the auxiliary member, and only the stirring pin is in contact with the auxiliary member, the first metal member, and the second metal member, The main welding rotary tool is moved along the abutting portion. And let the auxiliary member, the first metal member, and the second metal member be friction stir welded together, and the auxiliary member formed with burrs from the first metal member or the second metal member. And a removing step for removing.

According to the joining method according to the present invention, the first metal member and the second metal member are joined, and in addition to the first metal member and the second metal member, the auxiliary member is also friction stir welded simultaneously. It is possible to prevent metal shortage at the joint.
Moreover, since the burr | flash generate | occur | produced by friction stir welding can be removed from a metal member with an auxiliary member, the process of removing a burr | flash becomes easy.

Prior to the auxiliary member arranging step, it is preferable to include a temporary joining step in which only the stirring pin of the rotary tool for temporary joining is inserted into the abutting portion on the base end side and the friction stir welding is performed with a spot.
Prior to the auxiliary member arranging step, it is preferable to include a temporary joining step in which only the stirring pin of the rotary tool for temporary joining is inserted into the abutting portion on the distal end side and the friction stir welding is performed with a spot.

According to such a joining method, the load acting on the friction stirrer can be reduced by performing spot tacking of the butt portion in a state where only the stirring pin is in contact with the metal member. Moreover, the process time can be shortened compared with the case where temporary joining is performed on the entire length of the butt portion as in the prior art.

Further, it is preferable that the temporary welding rotary tool and the main welding rotary tool are the same rotary tool. According to such a joining method, since it is not necessary to replace the rotating tool, the working efficiency can be improved.

It is preferable to include the temporary joining process of joining the said butt | matching part of a base end side with the spot by welding before the said auxiliary member arrangement | positioning process. Moreover, MIG welding, TIG welding, or laser welding can be used for the said welding.
Before the auxiliary member arranging step, it is preferable to include a temporary joining step of joining the butt portion on the tip side with a spot by welding. Moreover, MIG welding, TIG welding, or laser welding can be used for the said welding.

According to such a joining method, the process time can be shortened as compared with the conventional case where temporary joining is performed on the entire length of the butt portion.

The present invention is also a joining method for joining the first metal member and the second metal member by friction stirring using a main welding rotary tool provided with a stirring pin, the first metal member and the second metal member. The metal member is formed in a U-shaped cross section in which the first horizontal plate protrudes from the base end portion of one side surface of the vertical plate and the second horizontal plate protrudes from the distal end portion of one side surface of the vertical plate. A butting step of butting the other side surface of the vertical plate of the first metal member and the other side surface of the vertical plate of the second metal member to form a butting portion, and the butting portion on the base end side An auxiliary member disposing step of disposing an auxiliary member on the first metal member and the second metal member so as to cover, and the stirring pin is inserted from the surface side of the auxiliary member, and only the stirring pin is inserted into the auxiliary member , Contact the first metal member and the second metal member In this state, the main-joining step of moving the main-joining rotary tool along the abutting portion on the base end side and performing friction stir welding of the auxiliary member, the first metal member, and the second metal member And a removing step of removing the auxiliary member formed with burrs from the first metal member and the second metal member.

The present invention is also a joining method for joining the first metal member and the second metal member by friction stirring using a main welding rotary tool provided with a stirring pin, the first metal member and the second metal member. The metal member is formed in a U-shaped cross section in which the first horizontal plate protrudes from the base end portion of one side surface of the vertical plate and the second horizontal plate protrudes from the distal end portion of one side surface of the vertical plate. A butting step of butting the other side surface of the vertical plate of the first metal member and the other side surface of the vertical plate of the second metal member to form a butting portion, and the butting portion on the base end side Auxiliary member arrangement step of arranging an auxiliary member on the first metal member or the second metal member, and inserting the stirring pin from the surface side of the auxiliary member, and only the stirring pin is the auxiliary member, Contacting the first metal member and the second metal member; In this state, the main joining step of performing friction stir welding of the auxiliary member, the first metal member, and the second metal member by moving the main joining rotary tool along the abutting portion on the base end side, And a removing step of removing the auxiliary member formed with burrs from the first metal member or the second metal member.

The present invention is also a joining method for joining the first metal member and the second metal member by friction stir welding using a main joining rotary tool having a stirring pin, wherein the first metal member is a plate The second metal member is formed in an L-shaped cross-section in which a horizontal plate protrudes from a base end portion on one side of the vertical plate, and the side surface of the first metal member and the second metal A butting step of butting the other side surface of the vertical plate of the member to form a butting portion, and after the butting step, the side surface of the first metal member and the base end portion of the second metal member An auxiliary member arranging step of bringing the back surface of the auxiliary member into surface contact with the horizontal plate of the second metal member so as to cover the butting portion, and after the auxiliary member arranging step, the stirring pin is inserted from the front surface side of the auxiliary member And only the stirring pin is used for the auxiliary member and the first metal member. In addition, the main rotating tool is relatively moved along the abutting portion in contact with the second metal member, and friction stir welding of the auxiliary member, the first metal member, and the second metal member is performed. And a removing step of removing the auxiliary member formed with burrs from the second metal member after the main joining step.

The present invention is also a joining method for joining the first metal member and the second metal member by friction stir welding using a main joining rotary tool having a stirring pin, wherein the first metal member is a plate The second metal member is formed in an L-shaped cross-section in which a horizontal plate protrudes from a base end portion on one side of the vertical plate, and the side surface of the first metal member and the second metal A butting step of butting the other side surface of the vertical plate of the member to form a butting portion, and after the butting step, the side surface of the first metal member and the base end portion of the second metal member An auxiliary member arranging step of bringing the back surface of the auxiliary member into surface contact with the side surface of the first metal member so as to cover the butting portion, and after the auxiliary member arranging step, the stirring pin is inserted from the surface side of the auxiliary member And only the stirring pin is used for the auxiliary member and the first metal. Friction stirring of the auxiliary member, the first metal member, and the second metal member by moving the main welding rotary tool relative to each other along the abutting portion in a state of being in contact with the material and the second metal member. A main joining step of joining, and a removing step of removing the auxiliary member on which the burr is formed from the first metal member after the main joining step.

According to each of the above inventions, the first metal member and the second metal member are joined, and in addition to the first metal member and the second metal member, the auxiliary member is also friction stir welded at the same time. Can prevent the lack of metal.

Further, since the burrs generated in the friction stir welding can be removed from the metal member together with the auxiliary members, the process of removing the burrs becomes easy.

Prior to the auxiliary member arranging step, friction stir by inserting only the stirring pin of the rotary tool for temporary joining into the butt portion constituted by the side surface of the first metal member and the base end portion of the second metal member. It is preferable to include a temporary bonding step for performing spot bonding by bonding.

Prior to the auxiliary member placement step, only the stirring pin of the temporary tool for rotation is inserted into the butt portion constituted by the tip of the first metal member and the tip of the vertical plate of the second metal member, and friction is caused. It is preferable to include a temporary joining step for performing spot joining by stirring joining.

In this case, it is preferable that the temporary welding rotary tool and the main welding rotary tool are the same rotary tool. According to such a joining method, since it is not necessary to replace the rotating tool, the working efficiency can be improved.

It is preferable to include a temporary joining step of spot joining by welding to the butt portion constituted by the side surface of the first metal member and the base end portion of the second metal member before the auxiliary member arranging step. In this case, the welding is preferably MIG welding, TIG welding, or laser welding.

Prior to the auxiliary member arranging step, it is preferable to include a temporary joining step of spot joining by welding to the butt portion constituted by the tip of the first metal member and the tip of the vertical plate of the second metal member. . In this case, the welding is preferably MIG welding, TIG welding, or laser welding.
According to this joining method, process time can be shortened compared with the case where temporary joining is performed with respect to the full length of the butt | matching part conventionally.

The present invention is also a joining method in which the first metal member and the second metal member are joined by friction stirring using a main joining rotary tool provided with a stirring pin, the first metal member and the second metal member being joined together. The metal member is formed in a rectangular tube shape in which the first horizontal plate is connected to the base end portions of the two vertical plates, and the second horizontal plate is connected to the distal ends of the two vertical plates. A butting step of abutting one outer surface of the first metal member and the other outer surface of the second metal member to form a butting portion, and covering the butting portion on the base end side. An auxiliary member disposing step of disposing an auxiliary member on the one metal member and the second metal member; inserting the stirring pin from the surface side of the auxiliary member; and only the stirring pin being the auxiliary member, the first metal member, and In contact with the second metal member, along the butt portion on the base end side A main joining step of performing friction stir welding of the auxiliary member, the first metal member, and the second metal member by moving the rotary tool for main joining, and the auxiliary member formed with burrs as the first metal And a removing step of removing from the member and the second metal member.

The present invention is also a joining method in which the first metal member and the second metal member are joined by friction stirring using a main joining rotary tool provided with a stirring pin, the first metal member and the second metal member being joined together. The metal member is formed in a rectangular tube shape in which the first horizontal plate is connected to the base end portions of the two vertical plates, and the second horizontal plate is connected to the distal ends of the two vertical plates. , A butting step of butting the one outer surface of the first metal member and the other outer surface of the second metal member to form a butting portion, along the butting portion on the base end side, An auxiliary member disposing step of disposing an auxiliary member on the metal member or the second metal member, the stirring pin is inserted from the surface side of the auxiliary member, and only the stirring pin is the auxiliary member, the first metal member, and the Along the abutting part on the base end side in the state of being in contact with the second metal member, A main joining step in which the rotating tool for main joining is moved to perform friction stir welding of the auxiliary member, the first metal member, and the second metal member, and the auxiliary member on which the burr is formed is used as the first metal member. Or a removing step of removing from the second metal member.

According to the joining method according to the present invention, the first metal member and the second metal member are joined, and in addition to the first metal member and the second metal member, the auxiliary member is also simultaneously friction stir welded, It is possible to prevent metal shortage at the joint.
Moreover, since the burr | flash generate | occur | produced by friction stir welding can be removed from a metal member with an auxiliary member, the process of removing a burr | flash becomes easy.

The present invention is also a joining method in which the first metal member and the second metal member are joined by friction stirring using a main joining rotary tool provided with a stirring pin, the first metal member and the second metal member being joined together. The metal member is formed in a U-shaped cross section in which the first horizontal plate protrudes from the base end portion of one side surface of the vertical plate and the second horizontal plate protrudes from the distal end portion of one side surface of the vertical plate. And the vertical dimension of the vertical plate of the second metal member is longer than the vertical dimension of the vertical plate of the first metal member, and the other side surface of the vertical plate of the first metal member; While matching the other side surface of the vertical plate of the second metal member, the first horizontal plate of the first metal member and the first horizontal plate of the second metal member are butted together, A step is formed by the second horizontal plate of the first metal member and the second horizontal plate of the second metal member. A butting step for forming a butt portion on the leading end side, an auxiliary member is disposed on the surface of the second horizontal plate of the first metal member, and an end surface of the auxiliary member is disposed on the other side of the vertical plate of the second metal member Auxiliary member arrangement step for butting the side surface of the auxiliary member, the stirring pin inserted from the surface side of the auxiliary member, and only the stirring pin in contact with the auxiliary member, the first metal member and the second metal member A main joining step of performing friction stir welding of the auxiliary member, the first metal member, and the second metal member by relatively moving the rotary tool for main welding along the abutting portion on the tip side; Removing the auxiliary member formed with the second metal member from the second metal member.

The present invention is also a joining method in which the first metal member and the second metal member are joined by friction stirring using a main joining rotary tool provided with a stirring pin, the first metal member and the second metal member being joined together. The metal member is formed in a U-shaped cross section in which the first horizontal plate protrudes from the base end portion of one side surface of the vertical plate and the second horizontal plate protrudes from the distal end portion of one side surface of the vertical plate. And the vertical dimension of the vertical plate of the second metal member is longer than the vertical dimension of the vertical plate of the first metal member, and the other side surface of the vertical plate of the first metal member; A base end where the first lateral plate of the first metal member and the first lateral plate of the second metal member are butted against the other side surface of the vertical plate of the second metal member A butting step for forming a butt part on the side, and the first metal part so as to cover the butt part on the base end side And an auxiliary member arranging step of arranging an auxiliary member on the second metal member, and the stirring pin is inserted from the surface side of the auxiliary member, and only the stirring pin is inserted into the auxiliary member, the first metal member, and the second Friction stir welding of the auxiliary member, the first metal member, and the second metal member by relatively moving the rotary tool for main welding along the abutting portion on the proximal end side in contact with the metal member And a removing step of removing the auxiliary member formed with burrs from the first metal member and the second metal member.

The present invention is also a joining method in which the first metal member and the second metal member are joined by friction stirring using a main joining rotary tool provided with a stirring pin, the first metal member and the second metal member being joined together. The metal member is formed in a U-shaped cross section in which the first horizontal plate protrudes from the base end portion of one side surface of the vertical plate and the second horizontal plate protrudes from the distal end portion of one side surface of the vertical plate. And the vertical dimension of the vertical plate of the second metal member is longer than the vertical dimension of the vertical plate of the first metal member, and the other side surface of the vertical plate of the first metal member; A base end where the first lateral plate of the first metal member and the first lateral plate of the second metal member are butted against the other side surface of the vertical plate of the second metal member A butting step for forming a butt portion on the side, and the first metal member or the butt portion along the butt portion on the base end side. An auxiliary member arranging step of arranging an auxiliary member on the second metal member, and the stirring pin is inserted from the surface side of the auxiliary member, and only the stirring pin is inserted into the auxiliary member, the first metal member, and the second metal. In a state in which the auxiliary member, the first metal member, and the second metal member are brought into contact with each other member, the main welding rotary tool is relatively moved along the abutting portion on the base end side, and the friction stir welding of the auxiliary member, the first metal member and the second metal member is performed. A main joining step to be performed, and a removing step of removing the auxiliary member on which the burr is formed from the first metal member or the second metal member.

According to the joining method in these inventions, the first metal member and the second metal member are joined, and in addition to the first metal member and the second metal member, the auxiliary member is simultaneously friction stir welded, It is possible to prevent metal shortage at the joint.
Moreover, since the burr | flash generate | occur | produced by friction stir welding can be removed from a metal member with an auxiliary member, the process of removing a burr | flash becomes easy.

Further, in the main joining step, the main welding rotary tool is relatively moved along the abutting portion on the front end side in a state where the rotation axis of the main welding rotary tool is inclined toward the first metal member. The friction stir welding of the auxiliary member, the first metal member, and the second metal member is preferably performed.
According to this joining method, when performing friction stir welding, the stirring pin can be easily inserted into the inner corner formed by the surface of the auxiliary member and the vertical plate of the second metal member.

Moreover, it is preferable to include the temporary joining process which inserts only the stirring pin of the rotary tool for temporary joining in the said butt | matching part of the front end side, and performs friction stir welding by a spot before the said auxiliary member arrangement | positioning process.
Moreover, it is preferable to include the temporary joining process which inserts only the stirring pin of the rotary tool for temporary joining in the said butt | matching part of a base end side, and performs friction stir welding by a spot before the said auxiliary member arrangement | positioning process.
According to this joining method, it is possible to reduce the load acting on the friction stirrer by performing spot spotting of the butt portion in a state where only the stirring pin is in contact with the metal member. Moreover, the process time can be shortened compared with the case where temporary joining is performed on the entire length of the butt portion as in the prior art.

Further, in the temporary joining step, only the stirring pin of the temporary joining rotary tool is placed on the abutting portion on the distal end side in a state where the rotation axis of the temporary joining rotary tool is inclined toward the first metal member side. It is preferable to insert and perform friction stir welding with a spot.
According to this joining method, it is possible to prevent the stirring pin from interfering with the second metal member when performing friction stir welding.

Moreover, it is preferable that the said temporary rotating tool for temporary joining and the said rotational tool for main joining are the same rotating tools.
According to such a joining method, since it is not necessary to replace the rotating tool, the working efficiency can be improved.

Moreover, it is preferable to include the temporary joining process of joining the said butt | matching part of the front end side with the spot by welding before the said auxiliary member arrangement | positioning process.
Moreover, it is preferable to include the temporary joining process of joining the said butt | matching part of a base end side with the spot by welding before the said auxiliary member arrangement | positioning process.
The welding is preferably MIG welding, TIG welding or laser welding.
According to this joining method, process time can be shortened compared with the case where temporary joining is performed with respect to the full length of the butt | matching part conventionally.

The present invention is also a joining method in which the first metal member and the second metal member are joined by friction stirring using a main joining rotary tool provided with a stirring pin, the first metal member and the second metal member being joined together. The metal member is formed in a rectangular tube shape in which the first horizontal plate is connected to the base end portions of the two vertical plates, and the second horizontal plate is connected to the distal ends of the two vertical plates. The vertical dimension of the vertical plate of the second metal member is longer than the vertical dimension of the vertical plate of the first metal member, and one outer surface of the first metal member and the second metal member The other outer surface of the first metal member, the first horizontal plate of the first metal member and the first horizontal plate of the second metal member are abutted flush with each other, and the first metal member of the first metal member A protrusion that forms a butt portion on the front end side with a step by the second horizontal plate and the second horizontal plate of the second metal member. An auxiliary member is disposed on the surface of the second horizontal plate of the first metal member, and an end surface of the auxiliary member is abutted against the other outer surface of the vertical plate of the second metal member. And the abutting portion on the tip side in a state where the stirring pin is inserted from the surface side of the auxiliary member and only the stirring pin is in contact with the auxiliary member, the first metal member, and the second metal member. A main joining step of performing friction stir welding of the auxiliary member, the first metal member, and the second metal member by relatively moving the rotary tool for main joining along the line, and the auxiliary member on which burrs are formed. And a removing step of removing from the second metal member.

The present invention is also a joining method in which the first metal member and the second metal member are joined by friction stirring using a main joining rotary tool provided with a stirring pin, the first metal member and the second metal member being joined together. The metal member is formed in a rectangular tube shape in which the first horizontal plate is connected to the base end portions of the two vertical plates, and the second horizontal plate is connected to the distal ends of the two vertical plates. The vertical dimension of the vertical plate of the second metal member is longer than the vertical dimension of the vertical plate of the first metal member, and one outer surface of the first metal member and the second metal member And the other outer surface of the first metal member are abutted to form a base end-side abutting portion where the first horizontal plate of the first metal member and the first horizontal plate of the second metal member are abutted flush with each other. An auxiliary member is attached to the first metal member and the second metal member so as to cover the butt portion and the butt portion on the base end side. An auxiliary member placing step to be placed, and the stirring pin is inserted from the surface side of the auxiliary member, and only the stirring pin is in contact with the auxiliary member, the first metal member, and the second metal member. A burr is formed, and a main joining step of performing friction stir welding of the auxiliary member, the first metal member, and the second metal member by relatively moving the main welding rotary tool along the abutting portion on the end side. Removing the auxiliary member that has been removed from the first metal member and the second metal member.

The present invention is also a joining method in which the first metal member and the second metal member are joined by friction stirring using a main joining rotary tool provided with a stirring pin, the first metal member and the second metal member being joined together. The metal member is formed in a rectangular tube shape in which the first horizontal plate is connected to the base end portions of the two vertical plates, and the second horizontal plate is connected to the distal ends of the two vertical plates. The vertical dimension of the vertical plate of the second metal member is longer than the vertical dimension of the vertical plate of the first metal member, and one outer surface of the first metal member and the second metal member And the other outer surface of the first metal member are abutted to form a base end-side abutting portion where the first horizontal plate of the first metal member and the first horizontal plate of the second metal member are abutted flush with each other. Auxiliary member is disposed on the first metal member or the second metal member along the butting step and the butting portion on the base end side An auxiliary member disposing step, and the stirring pin is inserted from the surface side of the auxiliary member, and only the stirring pin is in contact with the auxiliary member, the first metal member, and the second metal member, A burr is formed; and a main joining step of performing friction stir welding of the auxiliary member, the first metal member, and the second metal member by relatively moving the main welding rotary tool along the abutting portion on the side. And removing the auxiliary member from the first metal member or the second metal member.

According to the joining method according to the present invention, metal shortage at the joint can be prevented.

It is a perspective view which shows before the butt | matching process of the joining method which concerns on 1st embodiment. It is sectional drawing which shows the after-butting process of the joining method which concerns on 1st embodiment. It is a perspective view which shows temporary joining of the butt | matching part of the front end side in the temporary joining process of the joining method which concerns on 1st embodiment. It is a perspective view which shows temporary joining of the butt | matching part of a base end side in the temporary joining process of the joining method which concerns on 1st embodiment. It is a perspective view which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 1st embodiment. It is a perspective view which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 1st embodiment. It is a perspective view which shows the main joining process of the joining method which concerns on 1st embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 1st embodiment. It is sectional drawing which shows before the removal process of the joining method which concerns on 1st embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 1st embodiment. It is a perspective view which shows the modification of the temporary joining of the butt | matching part of the front end side in the temporary joining process of the joining method which concerns on 1st embodiment. It is a perspective view which shows the modification of the temporary joining of the butt | matching part of a base end side in the temporary joining process of the joining method which concerns on 1st this embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 2nd embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 2nd embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 2nd embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 3rd embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 3rd embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 3rd embodiment. It is a perspective view which shows before the butt | matching process of the joining method which concerns on 4th embodiment. It is sectional drawing which shows the after-butting process of the joining method which concerns on 4th embodiment. It is a perspective view which shows temporary joining of the butt | matching part of the front end side in the temporary joining process of the joining method which concerns on 4th embodiment. It is a perspective view which shows temporary joining of the butt | matching part of a base end side in the temporary joining process of the joining method which concerns on 4th embodiment. It is a perspective view which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 4th embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 4th embodiment. It is a perspective view which shows the main joining process of the joining method which concerns on 4th embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 4th embodiment. It is sectional drawing which shows the removal process before the joining method which concerns on 4th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 4th embodiment. It is a perspective view which shows the modification of the temporary joining of the butt | matching part of the front end side in the temporary joining process of the joining method which concerns on 4th embodiment. It is a perspective view which shows the modification of the temporary joining of the butt | matching part of the base end side in the temporary joining process of the joining method which concerns on 4th embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 5th embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 5th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 5th embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 6th embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 6th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 6th embodiment. It is a perspective view of the 1st metal member and the 2nd metal member explaining the butting process of the joining method concerning a 7th embodiment of the present invention. It is a longitudinal cross-sectional view of the state which faced | matched the 1st metal member and the 2nd metal member explaining the butt | matching process of the joining method which concerns on 7th embodiment of this invention. It is a perspective view explaining the temporary joining process of the joining method which concerns on 7th embodiment of this invention. It is a perspective view explaining the temporary joining process of the joining method which concerns on 7th embodiment of this invention. It is a perspective view explaining the auxiliary member arrangement process of the joining method concerning a 7th embodiment of the present invention. It is a longitudinal cross-sectional view explaining the auxiliary member arrangement | positioning process of the joining method which concerns on 7th embodiment of this invention. It is a perspective view explaining the main joining process of the joining method concerning a 7th embodiment of the present invention. It is a longitudinal cross-sectional view explaining the main joining process of the joining method which concerns on 7th embodiment of this invention. It is a longitudinal cross-sectional view explaining the removal process of the joining method which concerns on 7th embodiment of this invention. It is a perspective view explaining the auxiliary member arrangement | positioning process of the joining method which concerns on 8th embodiment of this invention. It is a longitudinal cross-sectional view explaining the auxiliary member arrangement | positioning process of the joining method which concerns on 8th embodiment of this invention. It is a perspective view explaining the main joining process of the joining method concerning an eighth embodiment of the present invention. It is a perspective view explaining the temporary joining process of the joining method which concerns on 9th embodiment of this invention. It is a perspective view explaining the temporary joining process of the joining method which concerns on 9th embodiment of this invention. It is a perspective view which shows before the butt | matching process of the joining method which concerns on 10th embodiment. It is sectional drawing which shows the after-butting process of the joining method which concerns on 10th embodiment. It is a perspective view which shows temporary joining of the butt | matching part of the front end side in the temporary joining process of the joining method which concerns on 10th embodiment. It is a perspective view which shows temporary joining of the butt | matching part of a base end side in the temporary joining process of the joining method which concerns on 10th embodiment. It is a perspective view which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 10th embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 10th embodiment. It is a perspective view which shows the main joining process of the joining method which concerns on 10th embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 10th embodiment. It is sectional drawing which shows before the removal process of the joining method which concerns on 10th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 10th embodiment. It is a perspective view which shows the modification of the temporary joining of the butt | matching part of the front end side in the temporary joining process of the joining method which concerns on 10th Embodiment. It is a perspective view which shows the modification of the temporary joining of the butt | matching part of the base end side in the temporary joining process of the joining method which concerns on 10th Embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 11th embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 11th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 11th embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 12th embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 12th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 12th embodiment. It is a perspective view which shows before the butt | matching process of the joining method which concerns on 13th embodiment. It is sectional drawing which shows the after-butting process of the joining method which concerns on 13th embodiment. It is a perspective view which shows the temporary joining process of the joining method which concerns on 13th embodiment. It is a perspective view which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 13th embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 13th embodiment. It is a perspective view which shows the main joining process of the joining method which concerns on 13th embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 13th embodiment. It is sectional drawing which shows before the removal process of the joining method which concerns on 13th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 13th embodiment. It is sectional drawing which shows the modification of the main joining process of the joining method which concerns on 13th embodiment. It is the figure which showed the modification of the temporary joining process of the joining method which concerns on 13th embodiment, and is a perspective view of the structure which inclined the rotation tool for this joining. It is the figure which showed the modification of the temporary joining process of the joining method which concerns on 13th embodiment, and is a perspective view of the structure which welds the butt | matching part of the front end side. It is a perspective view which shows before the butt | matching process of the joining method which concerns on 14th embodiment. It is sectional drawing which shows the after-butting process of the joining method which concerns on 14th embodiment. It is a perspective view which shows the temporary joining process of the joining method which concerns on 14th embodiment. It is a perspective view which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 14th embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 14th embodiment. It is a perspective view which shows the main joining process of the joining method which concerns on 14th embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 14th embodiment. It is sectional drawing which shows before the removal process of the joining method which concerns on 14th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 14th embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 15th embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 15th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 15th embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 16th embodiment. It is sectional drawing which shows this joining process of the joining method which concerns on 16th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 16th embodiment. It is a perspective view which shows before the butt | matching process of the joining method which concerns on 17th embodiment. It is sectional drawing which shows the after-butting process of the joining method which concerns on 17th embodiment. It is a perspective view which shows the temporary joining process of the joining method which concerns on 17th embodiment. It is a perspective view which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 17th embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 17th embodiment. It is a perspective view which shows the main joining process of the joining method which concerns on 17th embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 17th embodiment. It is sectional drawing which shows before the removal process of the joining method which concerns on 17th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 17th embodiment. It is sectional drawing which shows the modification of the main joining process of the joining method which concerns on 17th embodiment. It is the figure which showed the modification of the temporary joining process of the joining method which concerns on 17th Embodiment, and is a perspective view of the structure which inclined the rotation tool for this joining. It is the figure which showed the modification of the temporary joining process of the joining method which concerns on 17th Embodiment, and is a perspective view of the structure which welds the butt | matching part of the front end side. It is a perspective view which shows before the butt | matching process of the joining method which concerns on 18th embodiment. It is sectional drawing which shows the after-butting process of the joining method which concerns on 18th embodiment. It is a perspective view which shows the temporary joining process of the joining method which concerns on 18th embodiment. It is a perspective view which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 18th embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 18th embodiment. It is a perspective view which shows the main joining process of the joining method which concerns on 18th embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 18th embodiment. It is sectional drawing which shows the removal process before the joining method which concerns on 18th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 18th embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 19th embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 19th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 19th embodiment. It is sectional drawing which shows the auxiliary member arrangement | positioning process of the joining method which concerns on 20th embodiment. It is sectional drawing which shows the main joining process of the joining method which concerns on 20th embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 20th embodiment.

[First embodiment]
The joining method according to the first embodiment of the present invention will be described in detail with reference to FIGS. In the first embodiment, two metal plates (a first metal member and a second metal member) having an L-shaped cross section are joined. In the joining method according to the first embodiment, a butt process, a first provisional joining process, a second provisional joining process, an auxiliary member arranging process, a main joining process, and a removing process are performed. In the following description, “front surface” means a surface opposite to the “back surface”.

As shown in FIG. 1, the butting process is a process in which the first metal member 10 and the second metal member 20 having an L-shaped cross section are butted.
The 1st metal member 10 and the 2nd metal member 20 consist of a plate-shaped member made from an aluminum alloy. The material of the first metal member 10 and the second metal member 20 is appropriately selected from metals capable of friction stirring such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy. The first metal member 10 and the second metal member 20 according to the first embodiment are formed by arranging the same L-shaped mold members in opposite directions.

The first metal member 10 is a mold having an L-shaped axial cross section. The first metal member 10 includes a vertical plate 11 and a horizontal plate 12 that protrudes toward one side from a base end portion of one side surface 11a of the vertical plate 11. That is, the horizontal plate 12 is bent at a right angle from the base end portion of the vertical plate 11 (the lower end portion of the vertical plate 11 in FIG. 1) to one side. Thus, in the first metal member 10, the vertical plate 11 is raised at a right angle on the other side edge portion of the horizontal plate 12.
As shown in FIG. 2, a corner portion 13 bent at a right angle is formed at a connection portion between the vertical plate 11 and the horizontal plate 12. A curved surface curved in an arc shape is formed on the top of the outer side of the corner portion 13.
In addition, in the 1st metal member 10 of 1st embodiment, although formed in the length same as the height of the vertical board 11, and the horizontal width of the horizontal board 12, you may form in different length.

As shown in FIG. 1, the second metal member 20 is a mold member having an L-shaped axial cross section, and is a member having the same shape as the first metal member 10. The second metal member 20 includes a vertical plate 21 and a horizontal plate 22 protruding from the base end portion of one side surface 21a of the vertical plate 21 toward the other side.
Note that the second metal member 20 may be formed such that the height of the vertical plate 11 and the horizontal width of the horizontal plate 12 are different from each other in the same manner as the first metal member 10.

In the butting step, the first metal member 10 and the second metal member 20 are disposed in opposite directions, and as shown in FIG. 2, the other side surface 11b of the vertical plate 11 of the first metal member 10 and the second metal member The other side surface 21b of the 20 vertical plates 21 is brought into surface contact with each other.
At this time, the back surface 12a of the horizontal plate 12 of the first metal member 10 (the lower surface of the horizontal plate 12 in FIG. 2) and the back surface 22a of the horizontal plate 22 of the second metal member 20 (the lower surface of the horizontal plate 22 in FIG. 2) Is the same.
Further, the front end surface 11c of the vertical plate 11 of the first metal member 10 (the upper end surface of the vertical plate 11 in FIG. 2) and the front end surface 21c of the vertical plate 21 of the second metal member 20 (on the vertical plate 21 in FIG. 2). And the end face) are flush with each other.

When the other side surface 11b of the first metal member 10 and the other side surface 21b of the second metal member 20 are abutted by the butting step, the corner portion 13 of the first metal member 10 and the corner of the second metal member 20 are aligned. A base end-side butting portion J1 is formed by the portion 23.
Since the corner 13 of the first metal member 10 and the corner 23 of the second metal member 20 are curved in opposite directions, the corner 13 of the first metal member 10 and the corner 23 of the second metal member 20 are curved. Between the two, a substantially V-shaped gap S is formed.

Moreover, when the 1st metal member 10 and the 2nd metal member 20 are faced | matched by the butt | matching process, the front end surface 11c of the vertical plate 11 of the 1st metal member 10 and the front end surface of the vertical plate 21 of the 2nd metal member 20 21c forms a butt portion J2 on the distal end side.

As shown in FIG. 3, the first temporary joining step is a step of performing temporary joining with respect to the abutting portion J 2 on the distal end side using a rotating tool F (temporary joining rotating tool).
The rotary tool F is made of, for example, tool steel. The rotary tool F includes a connecting portion F1 and a stirring pin F2. The connecting part F1 is a part connected to the rotating shaft of the friction stirrer. The connecting part F1 has a cylindrical shape.

The stirring pin F2 extends from the connecting portion F1 and is coaxial with the connecting portion F1. The stirring pin F2 is tapered as it is separated from the connecting portion F1. A spiral groove is formed on the outer peripheral surface of the stirring pin F2. In the first embodiment, in order to rotate the rotary tool F to the right, the spiral groove is formed counterclockwise as it goes from the proximal end to the distal end.
In addition, when rotating the rotation tool F counterclockwise, it is preferable to form the spiral groove clockwise as it goes from the proximal end to the distal end.

By setting the spiral groove in this manner, the plastic fluidized metal during frictional stirring is guided to the tip side of the stirring pin F2 by the spiral groove. Thereby, the quantity of the metal which overflows outside the to-be-joined metal member (the 1st metal member 10, the 2nd metal member 20, and the auxiliary member 30) can be decreased. The spiral groove may be omitted.

In the first temporary joining step, spot tacking is performed by bringing only the stirring pin F2 of the rotated rotary tool F into contact with the abutting portion J2 on the distal end side. In the first temporary joining step, only the stirring pin F2 is shallowly pushed into the abutting portion J2 on the tip side with a predetermined interval. A plasticized region W0 is formed in the trace of pushing of the stirring pin F2.
The rotary tool F is preferably attached to an arm robot (not shown) provided with a rotation drive means such as a spindle unit at the tip. Thereby, spot tacking can be performed easily.

As shown in FIG. 4, the second temporary joining step is a step of temporarily joining the base end side butt portion J 1 using the rotating tool F (temporary joining rotating tool).
In the second temporary joining step, the first metal member 10 and the second metal member 20 are turned upside down and rotated, and spot rotation is performed on the abutting portion J1 on the base end side by the rotating tool F. In the second temporary joining step, as in the first temporary joining step, the plasticized region W0 is formed by pressing only the stirring pin F2 shallowly into the abutting portion J1 on the base end side with a predetermined interval. .

As shown in FIG. 5, the auxiliary member arranging step is a step of arranging the auxiliary member 30 on the first metal member 10 and the second metal member 20 so as to cover the base end-side butting portion J1.
The auxiliary member 30 is a metal plate member. The auxiliary member 30 is not particularly limited as long as it is a metal capable of friction stirring, but in the first embodiment, the auxiliary member 30 is made of the same material as the first metal member 10 and the second metal member 20.
The plate thickness of the auxiliary member 30 is appropriately set so that the plasticized region W does not run out of metal and the gap S of the butt end portion J1 on the base end side is filled with metal after the main joining step described later. In the first embodiment, the plate thickness of the auxiliary member 30 is set to be thinner than the plate thicknesses of the first metal member 10 and the second metal member 20.

In the auxiliary member arranging step, as shown in FIG. 6, the back surface 30 b of the auxiliary member 30 and the back surface 12 a of the horizontal plate 12 of the first metal member 10 and the back surface 22 a of the horizontal plate 22 of the second metal member 20 are in surface contact. Let Thereby, the butt portion J1 on the proximal end side is covered by the auxiliary member 30.
Moreover, the 1st metal member 10, the 2nd metal member 20, and the auxiliary member 30 are restrained to a mount (not shown) so that a movement is impossible with a jig | tool (not shown). In addition, in 1st embodiment, although the auxiliary member 30 is made into plate shape, another shape may be sufficient.

As shown in FIG. 7, the main joining step is a step of performing friction stir welding with respect to the butt end portion J 1 on the base end side using the rotary tool F (main welding rotary tool). In the main joining step, as shown in FIG. 8, the rotating tool F rotated to the right is inserted from the surface 30a of the auxiliary member 30, and the insertion depth of the stirring pin F2 is set so as to reach the abutting portion J1 on the base end side. Set.
In the main joining step, friction stir welding is performed with only the stirring pin F2 in contact with the auxiliary member 30, the first metal member 10, and the second metal member 20, and the proximal end side of the stirring pin F2 is exposed.
Then, as shown in FIG. 7, the rotary tool F is moved along the base end-side butting portion J1. As a result, the auxiliary member 30, the first metal member 10, and the second metal member 20 are friction stir welded at the abutting portion J1 on the proximal end side. A plasticized region W is formed on the movement locus of the rotary tool F.
After the main joining step, as shown in FIG. 9, the auxiliary member 30 is divided into the first metal member 10 side and the second metal member 20 side by the plasticized region W. Further, burrs V and V are formed at the ends of the divided

auxiliary members

30 and 30.

The removal step is a step of removing the auxiliary member 30 from the first metal member 10 and the second metal member 20 as shown in FIG. In the removing step, the auxiliary member 30 is bent from the first metal member 10 and the second metal member 20 by bending the auxiliary member 30 in a direction away from the first metal member 10 and the second metal member 20, for example. . Thereby, the horizontal plate 12 of the first metal member 10 and the horizontal plate 22 of the second metal member 20 are joined in a planar shape.

According to the joining method which concerns on 1st embodiment demonstrated above, as shown in FIG. 8, while the 1st metal member 10 and the 2nd metal member 20 are joined, the 1st metal member 10 and the 2nd metal member In addition to 20, the auxiliary member 30 can also be friction stir welded at the same time to prevent metal shortage at the joint (plasticized region W).
Further, by performing friction stir welding in a state where only the stirring pin F2 of the rotary tool F is in contact with the auxiliary member 30, the first metal member 10, and the second metal member 20, the load acting on the friction stirrer is reduced. be able to.
In the joining method according to the first embodiment, as shown in FIGS. 3, 4, and 7, in the main joining process and the temporary joining process, only the stirring pin F 2 of the rotary tool F is brought into contact with the metal member to cause friction. Since stirring is performed, the amount of heat input can be reduced, and the thermal strain of the first metal member 10 and the second metal member 20 can be reduced.

Moreover, in the joining method which concerns on 1st embodiment, as shown in FIG. 8, the auxiliary member 30 is arrange | positioned in the butt | matching part J1 of a base end side, and the auxiliary member 30, the 1st metal member 10, and the 2nd metal member 20 are attached. Since the friction stir welding is performed at the same time, the gap S (see FIG. 6) between the

corner portions

13 and 23 of the first metal member 10 and the second metal member 20 can be filled with the plastic fluidized metal.

Further, in the joining method according to the first embodiment, as shown in FIG. 9, burrs V and V are formed in the auxiliary member 30 by the main joining process, but as shown in FIG. 10, the burrs V are removed in the removing process. Can be removed together with the auxiliary member 30. Thereby, the process of removing the burr | flash V can be performed easily.
The auxiliary member 30 may be removed by using a removing device or the like, but in the first embodiment, the auxiliary member 30 can be easily removed manually.

Further, in the joining method according to the first embodiment, since the temporary joining process is performed, it is possible to prevent the opening of the butt end portion J1 on the base end side and the butt end portion J2 on the distal end side when performing the main joining step. In the first embodiment, it is possible to prevent the opening more reliably by temporarily joining the butting portion J2 on the distal end side.
Further, in the joining method according to the first embodiment, as shown in FIGS. 3 and 4, the base end side butting portion J1 and the base end side in a state where only the stirring pin F2 of the rotary tool F is in contact with the metal member. By carrying out spot tacking of the butting portion J2, the load acting on the friction stirrer can be reduced. Moreover, the process time can be shortened compared with the case where temporary joining is performed on the entire length of the butt portion as in the prior art.

Moreover, in 1st embodiment, the rotation tool F (rotary tool for temporary joining) which performs a 1st temporary joining process and a 2nd temporary joining process, and the rotational tool F (main joining rotational tool) which performs a main joining process are the same. The rotation tool is used. Thereby, since it is not necessary to replace | exchange a rotating tool at each process, work efficiency can be improved.

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, you may use the rotary tool provided with the shoulder part and the stirring pin for the rotary tool for temporary joining or the rotary tool for main joining. Further, different rotary tools may be used in the temporary joining step and the main joining step.

Moreover, in 1st embodiment, as shown in FIG. 2, the corner | angular part 13 of the 1st metal member 10 and the corner | angular part 23 of the 2nd metal member 20 are chamfered, and there is a clearance gap in the butt | matching part J1 of a base end side. Although S is provided, it may be configured so that there is no gap S.

Further, in the first temporary joining step of the first embodiment, as shown in FIG. 3, the rotary tool F is used to temporarily join the abutting portion J2 on the distal end side, but as shown in FIG. The temporary joining may be performed by welding on the butted portion J2 on the distal end side. At this time, the type of welding is not particularly limited, but for example, arc welding such as MIG welding or TIG welding or laser welding can be used. Then, spot welding is performed at a predetermined interval while bringing the welding torch H close to the abutting portion J2 on the front end side. In this way, a welding mark W2 is formed in the spot spot-attached portion.

Also, as in the modification of the first temporary joining step, as shown in FIG. 12, in the second temporary joining step, temporary joining may be performed by welding on the base end side butt portion J1. Also in this case, the type of welding is not particularly limited. Then, spot welding is performed with a predetermined interval while the welding torch H is brought close to the butt portion J1 on the base end side.

Thus, in the temporary joining step, as shown in FIG. 11 and FIG. 12, when spot tacking of the butt end portion J1 and the butt end portion J2 on the proximal end side is performed by welding, The load acting on the friction stirrer can be reduced as compared with the case where the friction stirrer is performed. In addition, the process time can be shortened as compared with the conventional case where temporary joining is performed on the entire length of the base end side butting portion J1 and the distal end side butting portion J2.

[Second Embodiment]
Next, the auxiliary member arranging step, the main joining step, and the removing step of the joining method according to the second embodiment of the present invention will be described in detail with reference to FIGS.
As shown in FIG. 13, the joining method according to the second embodiment is different from the first embodiment in the ratio of arranging the auxiliary member 30 on the first metal member 10 and the second metal member 20 in the auxiliary member arranging step. . The joining method according to the second embodiment will be described with a focus on differences from the joining method of the first embodiment.

In the auxiliary member arranging step of the second embodiment, as shown in FIG. 13, about 90% of the auxiliary member 30 is arranged on the second metal member 20, and the remaining 10% of the auxiliary member 30 is about the first metal member 10. To place. That is, the auxiliary member 30 is disposed so as to slightly protrude from the rear surface 12a of the lateral plate 12 of the first metal member 10 with respect to the abutting portion J1 on the base end side.

In the main joining step of the second embodiment, as shown in FIG. 14, the spiral groove is formed counterclockwise from the proximal end toward the distal end in order to rotate the rotary tool F (main joining rotary tool) to the right. Yes. In the main joining process, the rotary tool F is relatively moved from the near side to the far side in FIG.
In the main joining step of the second embodiment, friction stir welding is performed in a state where only the stirring pin F2 of the rotating tool F rotated to the right is in contact with the auxiliary member 30, the first metal member 10, and the second metal member 20. Thereby, in the butt | matching part J1 of a base end side, the auxiliary member 30, the 1st metal member 10, and the 2nd metal member 20 are friction-stir-welded, and the plasticization area | region W is formed.

In the second embodiment, since the rotary tool F is rotated to the right, the second metal member 20 side is a side where the magnitude of the feed speed is subtracted from the magnitude of the tangential speed on the outer periphery of the rotary tool F. On the other hand, the first metal member 10 side is a side where the magnitude of the feed speed is added from the magnitude of the tangential speed on the outer periphery of the rotary tool F.
When the rotational speed of the rotary tool F is low, the temperature of the plastic fluidized material is likely to rise on the first metal member 10 side compared to the second metal member 20 side of the plasticizing region W. There is a tendency that many burrs are generated on the member 10 side. On the other hand, when the rotational speed of the rotary tool F is fast, the temperature of the plastic fluidized material is increased on the first metal member 10 side, but burrs are generated on the second metal member 20 side due to the higher rotational speed. There is a tendency.

In the main joining process of the second embodiment, since the rotation speed of the rotary tool F is set to be high, many burrs V are formed on the second metal member 20 side of the auxiliary member 30.
In the second embodiment, in the main joining step, the contact ratio between the first metal member 10 and the auxiliary member 30 is adjusted so that the auxiliary member 30 does not remain on the first metal member 10 side.

In the removing process of the second embodiment, as shown in FIG. 15, by removing the auxiliary member 30 from the second metal member 20, the burr V can be removed together with the auxiliary member 30 remaining only on one side. The step of removing the burr V can be easily performed. Further, by setting the rotation speed of the rotary tool F faster, the moving speed (feed speed) of the rotary tool F can be increased. Thereby, a joining cycle can be shortened.

As described above, in the main joining process, on which side of the traveling direction of the rotary tool F the burr V is generated depends on the joining conditions. The joining conditions include the rotational speed of the rotary tool F, the rotational direction, the moving speed (feeding speed), the moving direction, the inclination angle of the stirring pin F2, the material of the first metal member 10, the second metal member 20 and the auxiliary member 30. It is determined by each element such as the thickness of each member and a combination of these elements. If the auxiliary member 30 is arranged on the side where the burrs V are generated or the side where many burrs V are generated according to the joining conditions, the step of removing the burrs V can be easily performed.

As described above, the second embodiment of the present invention has been described. However, similar to the first embodiment, the design can be changed as appropriate without departing from the spirit of the present invention.

[Third embodiment]
Next, the auxiliary member arranging step, the main joining step, and the removing step of the joining method according to the third embodiment of the present invention will be described in detail with reference to FIGS.
As shown in FIG. 16, the joining method according to the third embodiment differs from the first embodiment in that the auxiliary member 30 is in surface contact with only the first metal member 10 in the auxiliary member process. The joining method according to the third embodiment will be described with a focus on differences from the joining method of the first embodiment.

In the joining method according to the third embodiment, as shown in FIG. 17, in the main joining step, the rotating tool F is rotated counterclockwise, so that the spiral groove of the stirring pin F2 is formed clockwise as it goes from the proximal end to the distal end. Has been. In the main joining step, the rotary tool F is relatively moved from the near side to the far side in FIG.

In the third embodiment, since the rotary tool F is rotated counterclockwise, the first metal member 10 side is a side on which the magnitude of the feed speed is subtracted from the magnitude of the tangential speed on the outer periphery of the rotary tool F. On the other hand, the second metal member 20 side is a side where the magnitude of the feed speed is added from the magnitude of the tangential speed on the outer periphery of the rotary tool F.
When the rotational speed of the rotary tool F is low, the temperature of the plastic fluidizing material is likely to rise on the second metal member 20 side compared to the first metal member 10 side of the plasticizing region W. Many burrs tend to occur on the member 20 side. On the other hand, when the rotational speed of the rotary tool F is high, the temperature of the plastic fluidized material increases on the second metal member 20 side, but burrs are generated on the first metal member 10 side due to the higher rotational speed. There is a tendency.

In the main joining process of the third embodiment, since the rotational speed of the rotary tool F is set high, a large number of burrs V are formed on the first metal member 10 side of the auxiliary member 30.
And in the removal process of 3rd embodiment, the burr | flash V can be removed with the auxiliary member 30 by removing the auxiliary member 30 from the 1st metal member 10, as shown in FIG. That is, according to this embodiment, it is only necessary to remove the auxiliary member 30 and the burr V remaining on only one side.

The third embodiment of the present invention has been described above. However, similar to the first embodiment, the design can be changed as appropriate without departing from the spirit of the present invention.
For example, in the auxiliary member arranging step, the auxiliary member 30 may be arranged so as to be in surface contact with only the second metal member 20. In this case, various joining conditions are set so that the burrs V are generated in the auxiliary member 30 in the main joining process, and the auxiliary member 30 is removed from the second metal member 20 in the removing process. V can be removed together with the auxiliary member 30. Moreover, you may abbreviate | omit both a 1st temporary joining process and a 2nd temporary joining process.

[Fourth embodiment]
A joining method according to the fourth embodiment of the present invention will be described in detail with reference to FIGS. In the fourth embodiment, two metal plates (first metal member and second metal member) having a U-shaped cross section are joined. In the joining method according to the fourth embodiment, a butting process, a first temporary joining process, a second temporary joining process, an auxiliary member arranging process, a main joining process, and a removing process are performed.

As shown in FIG. 19, the butting process is a process in which the first metal member 110 and the second metal member 120 having a U-shaped cross section are butted.
The first metal member 110 and the second metal member 120 are made of aluminum alloy plate-like members. The materials of the first metal member 110 and the second metal member 120 are appropriately selected from metals capable of friction stirring such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy.
The first metal member 110 and the second metal member 120 according to the fourth embodiment are arranged such that a U-shaped mold member is opened in the lateral direction, and two mold members are arranged in opposite directions. .

The first metal member 110 is a mold member having a U-shaped axial cross section. The first metal member 110 includes a vertical plate 111, a first horizontal plate 112 projecting toward one side from a base end portion of one side surface 111a of the vertical plate 111, and a distal end portion of one side surface 111a of the vertical plate 111. It is comprised by the 2nd horizontal plate 113 protruded toward one side.
That is, the first horizontal plate 112 is bent at a right angle from the base end portion of the vertical plate 111 (the lower end portion of the vertical plate 111 in FIG. 19) to one side, and the distal end portion of the vertical plate 111 (the vertical plate 111 of FIG. 19). The second horizontal plate 113 is bent at a right angle from one end to the other.
As shown in FIG. 20, a corner portion 114 bent at a right angle is formed at a connection portion between the vertical plate 111 and the first horizontal plate 112 and the second horizontal plate 113. A curved surface that is curved in an arc shape is formed on the outer top portion of the corner portion 114.
In the first metal member 110 of the fourth embodiment, the height of the vertical plate 111 is the same as the horizontal width of the first horizontal plate 112 and the second horizontal plate 113, but the length is different. May be.

As shown in FIG. 19, the second metal member 120 is a mold member having a U-shaped axial cross section, and is a member having the same shape as the first metal member 110. The second metal member 120 includes a vertical plate 121, a first horizontal plate 122 projecting from the base end portion of one side surface 121a of the vertical plate 121 toward the other side, and a distal end portion of one side surface 121a of the vertical plate 121. The second horizontal plate 123 protrudes toward the other side.
Note that, as with the first metal member 110, the second metal member 120 may be formed such that the height of the vertical plate 111 and the horizontal widths of the first horizontal plate 112 and the second horizontal plate 113 are different from each other.

In the butting step, the first metal member 110 and the second metal member 120 are disposed in opposite directions, and as shown in FIG. 20, the other side surface 111b of the vertical plate 111 of the first metal member 110 and the second metal member The other side surface 121b of the 120 vertical plates 121 is brought into surface contact with each other.
At this time, the back surface 112a of the first horizontal plate 112 of the first metal member 110 (the lower surface of the first horizontal plate 112 in FIG. 20) and the back surface 122a of the first horizontal plate 122 of the second metal member 120 (the first surface in FIG. 20). The lower surface of one horizontal plate 122 is flush with the other.
Further, the surface 113a of the second horizontal plate 113 of the first metal member 110 (the upper surface of the second horizontal plate 113 in FIG. 20) and the surface 123a of the second horizontal plate 123 of the second metal member 120 (second in FIG. 20). The upper surface of the horizontal plate 123 is flush with the upper surface.

When the other side surface 111b of the first metal member 110 and the other side surface 121b of the second metal member 120 are abutted by the butting process, the corner 114 on the proximal end side of the first metal member 110 and the second side surface 121b The base end side butting portion J11 is formed by the base end side corner portion 124 of the metal member 120.
Further, the leading end side butting portion J12 is formed by the leading end side corner portion 114 of the first metal member 110 and the leading end side corner portion 124 of the second metal member 120.
Since the corner portion 114 of the first metal member 110 and the corner portion 124 of the second metal member 120 are curved in opposite directions, the corner portion 114 of the first metal member 110 and the corner portion 124 of the second metal member 120 are curved. Between the two, a substantially V-shaped gap S is formed.

As shown in FIG. 21, the first temporary joining step is a step of performing temporary joining to the abutting portion J12 on the distal end side using a rotating tool F (temporary joining rotating tool).

In the first temporary joining step, spot welding is performed by bringing only the stirring pin F2 of the rotated rotary tool F into contact with the abutting portion J12 on the distal end side. In the first temporary joining step, only the stirring pin F2 is shallowly pushed into the abutting portion J12 on the tip side with a predetermined interval. A plasticized region W0 is formed in the trace of pushing of the stirring pin F2.

As shown in FIG. 22, the second temporary joining step is a step of temporarily joining the butt end portion J 11 on the base end side using the rotary tool F (temporary joining rotary tool).
In the second temporary joining step, the first metal member 110 and the second metal member 120 are turned upside down and turned upside down, and spot tacking is performed on the abutting portion J11 on the base end side by the rotated rotary tool F. In the second temporary joining step, as in the first temporary joining step, the plasticized region W0 is formed by pressing only the stirring pin F2 shallowly into the butt end J11 on the base end side with a predetermined interval. .

As shown in FIG. 23, the auxiliary member arranging step is a step of arranging the auxiliary member 130 on the first metal member 110 and the second metal member 120 so as to cover the butt end J11 on the base end side.
The auxiliary member 130 is a metal plate member. The auxiliary member 130 is not particularly limited as long as it is a metal capable of friction stirring, but in the fourth embodiment, the auxiliary member 130 is made of the same material as the first metal member 110 and the second metal member 120.
The plate thickness of the auxiliary member 130 is appropriately set so that the plasticized region W does not have a metal shortage and the gap S of the butt end portion J11 on the base end side is filled with metal after the main joining step described later. In the fourth embodiment, the plate thickness of the auxiliary member 130 is set to be thinner than the plate thickness of the first metal member 110 and the second metal member 120.

In the auxiliary member arranging step, as shown in FIG. 24, the back surface 130b of the auxiliary member 130, the back surface 112a of the first horizontal plate 112 of the first metal member 110, and the back surface 122a of the first horizontal plate 122 of the second metal member 120. And surface contact. Thereby, the butting part J11 on the base end side is covered by the auxiliary member 130.
Moreover, the 1st metal member 110, the 2nd metal member 120, and the auxiliary member 130 are restrained to a mount (not shown) so that a movement is impossible with a jig | tool (not shown). In addition, in 4th embodiment, although the auxiliary member 130 is made into plate shape, another shape may be sufficient.

As shown in FIG. 25, the main joining step is a step of performing friction stir welding on the base end side butt portion J11 using the rotary tool F (the main welding rotary tool). In the main joining step, as shown in FIG. 26, the rotating tool F rotated to the right is inserted from the surface 130a of the auxiliary member 130, and the insertion depth of the stirring pin F2 is set so as to reach the abutting portion J11 on the proximal end side. Set.
In the main joining step, friction stir welding is performed with only the stirring pin F2 in contact with the auxiliary member 130, the first metal member 110, and the second metal member 120, and the proximal end side of the stirring pin F2 is exposed.

Then, as shown in FIG. 25, the rotary tool F is moved along the butt end J11 on the base end side. Thereby, the auxiliary member 130, the first metal member 110, and the second metal member 120 are friction stir welded at the butt end portion J11 on the base end side. A plasticized region W is formed on the movement locus of the rotary tool F.
After the main joining step, the auxiliary member 130 is divided into the first metal member 110 side and the second metal member 120 side by the plasticizing region W as shown in FIG. Further, burrs V and V are formed at the ends of the divided

auxiliary members

130 and 130.

The removing step is a step of removing the auxiliary member 130 from the first metal member 110 and the second metal member 120 as shown in FIG. In the removal step, the auxiliary member 130 is bent away from the first metal member 110 and the second metal member 120 by, for example, manual work, and the auxiliary member 130 is removed from the first metal member 110 and the second metal member 120. . Thereby, the 1st horizontal plate 112 of the 1st metal member 110 and the 1st horizontal plate 122 of the 2nd metal member 120 are joined planarly.

According to the joining method according to the fourth embodiment described above, as shown in FIG. 26, the first metal member 110 and the second metal member 120 are joined, and the first metal member 110 and the second metal member are joined. In addition to 120, the auxiliary member 130 is also subjected to friction stir welding at the same time, so that metal shortage at the joint (plasticized region W) can be prevented.
Further, by performing friction stir welding with only the stirring pin F2 of the rotary tool F in contact with the auxiliary member 130, the first metal member 110, and the second metal member 120, the load acting on the friction stirrer is reduced. be able to.
Further, in the joining method according to the fourth embodiment, as shown in FIGS. 21, 22, and 25, in the main joining step and the temporary joining step, only the stirring pin F2 of the rotary tool F is brought into contact with the metal member to cause friction. Since stirring is performed, the amount of heat input can be reduced, and the thermal strain of the first metal member 110 and the second metal member 120 can be reduced.

Further, in the joining method according to the fourth embodiment, as shown in FIG. 26, the auxiliary member 130 is disposed at the butt end J11 on the base end side, and the auxiliary member 130, the first metal member 110, and the second metal member 120 are connected. Since the friction stir welding is performed at the same time, the gap S (see FIG. 24) between the

corner portions

114 and 124 of the first metal member 110 and the second metal member 120 can be filled with the plastic fluidized metal.

Further, in the joining method according to the fourth embodiment, as shown in FIG. 27, burrs V and V are formed on the auxiliary member 130 by the main joining process. However, as shown in FIG. Can be removed together with the auxiliary member 130. Thereby, the process of removing the burr | flash V can be performed easily.
The auxiliary member 130 may be removed using a removing device or the like, but in the fourth embodiment, the auxiliary member 130 can be easily removed manually.

Moreover, in the joining method according to the fourth embodiment, since the temporary joining process is performed, it is possible to prevent the opening of the butt end portion J11 on the base end side and the butt end portion J12 on the distal end side when performing the main joining step. In the fourth embodiment, it is possible to prevent the opening more reliably by temporarily joining the abutting portion J12 on the distal end side.
Further, in the joining method according to the fourth embodiment, as shown in FIGS. 21 and 22, the base end side butting portion J11 and the base end side in a state where only the stirring pin F2 of the rotary tool F is in contact with the metal member. By carrying out spot tacking of the butting portion J12, the load acting on the friction stirrer can be reduced. Moreover, the process time can be shortened compared with the case where temporary joining is performed on the entire length of the butt portion as in the prior art.

Moreover, in 4th embodiment, the rotation tool F (rotary tool for temporary joining) which performs a 1st temporary joining process and a 2nd temporary joining process, and the rotary tool F (rotary tool for final joining) which performs a main joining process are the same. The rotation tool is used. Thereby, since it is not necessary to replace | exchange a rotating tool at each process, work efficiency can be improved.

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, you may use the rotary tool provided with the shoulder part and the stirring pin for the rotary tool for temporary joining or the rotary tool for main joining. Further, different rotary tools may be used in the temporary joining step and the main joining step.

In the fourth embodiment, as shown in FIG. 20, the corner portion 114 of the first metal member 110 and the corner portion 124 of the second metal member 120 are rounded, and the base end side butting portion J11 and the distal end are formed. Although the gap S is provided in the butt portion J12 on the side, it may be configured so that there is no gap S.

Further, in the first temporary joining step of the fourth embodiment, as shown in FIG. 21, temporary joining is performed to the abutting portion J12 on the distal end side using the rotary tool F, but as shown in FIG. 29. The temporary joining may be performed by welding on the butt end J12 on the distal end side. At this time, the type of welding is not particularly limited, but for example, arc welding such as MIG welding or TIG welding or laser welding can be used. Then, spot welding is performed at a predetermined interval while bringing the welding torch H close to the abutting portion J12 on the distal end side. In this way, a welding mark W2 is formed in the spot spot-attached portion.

Also, as in the modification of the first temporary joining step, as shown in FIG. 30, in the second temporary joining step, temporary joining may be performed by welding to the butt portion J11 on the base end side. Also in this case, the type of welding is not particularly limited. Then, spot welding is performed with a predetermined interval while the welding torch H is brought close to the base end side butting portion J11.

Thus, in the temporary joining step, as shown in FIG. 29 and FIG. 30, when spot tacking of the butt end portion J11 on the base end side and the butt end portion J12 on the tip end side is performed by welding, The load acting on the friction stirrer can be reduced as compared with the case where the friction stirrer is performed. Further, the process time can be shortened as compared with the conventional case where temporary joining is performed on the total length of the base end side butting portion J11 and the distal end side butting portion J12.

In the fourth embodiment, as shown in FIG. 25, the auxiliary member 130 is disposed only in the base end side abutting portion J11 and friction stir welding is performed. It may be arranged and friction stir welded.

[Fifth embodiment]
Next, the auxiliary member arranging step, the main joining step, and the removing step of the joining method according to the fifth embodiment of the present invention will be described in detail with reference to FIGS.
As shown in FIG. 31, the joining method according to the fifth embodiment is different from the fourth embodiment in the ratio of arranging the auxiliary member 130 on the first metal member 110 and the second metal member 120 in the auxiliary member arranging step. . The joining method according to the fifth embodiment will be described with a focus on differences from the joining method according to the fourth embodiment.

In the auxiliary member arranging step of the fifth embodiment, as shown in FIG. 31, about 90% of the auxiliary member 130 is arranged on the second metal member 120, and the remaining 10% of the auxiliary member 30 is made of the first metal member 110. To place. That is, the auxiliary member 130 is arranged so as to slightly protrude from the back surface 112a of the first horizontal plate 112 of the first metal member 110 with respect to the abutting portion J11 on the base end side.

In the main joining process of the fifth embodiment, as shown in FIG. 31, in order to rotate the rotating tool F (main joining rotating tool) to the right, the spiral groove is formed counterclockwise from the base end toward the tip. Yes. In the main joining process, the rotary tool F is relatively moved from the near side to the far side in FIG.
In the main joining step of the fifth embodiment, friction stir welding is performed in a state where only the stirring pin F2 of the rotating tool F rotated to the right is in contact with the auxiliary member 130, the first metal member 110, and the second metal member 120. As a result, the auxiliary member 130, the first metal member 110, and the second metal member 120 are friction stir welded at the abutting portion J 11 on the base end side to form the plasticized region W.

In the fifth embodiment, since the rotating tool F is rotated to the right, the second metal member 120 side subtracts the moving speed of the rotating tool from the flow side of the rotating tool F (retreating side: tangential speed on the outer periphery of the rotating tool). Side). On the other hand, the first metal member 110 side is a shear side of the rotary tool F (advancing side: the side on which the moving speed of the rotary tool is added to the tangential speed on the outer periphery of the rotary tool).

When the rotational speed of the rotary tool F is low, the temperature of the plastic fluid material is likely to rise on the shear side compared to that on the flow side. Therefore, the shear side outside the plasticization region W1 (first metal member 110 side). There is a tendency that many burrs V are generated.
On the other hand, when the rotation speed of the rotary tool F is high, the temperature of the plastic fluidized material increases on the shear side compared to the flow side, but the flow speed outside the plasticization region W1 (second) is increased by the higher rotation speed. Many burrs V tend to occur on the metal member 120 side.

In the fifth embodiment, the moving direction and the rotating direction of the rotating tool F are set so that the flow side of the rotating tool F is the second metal member 120 side (right side of the joining center). The rotation direction and the traveling direction of the rotary tool F are not limited to those described above, and may be set as appropriate.

In the fifth embodiment, since the rotation speed of the rotary tool F is set high, there is a tendency that many burrs V are generated on the flow side outside the plasticizing region W1. That is, the burrs V can be concentrated on the auxiliary member 130 side. Further, by setting the rotation speed of the rotary tool F faster, the moving speed (feed speed) of the rotary tool F can be increased. Thereby, a joining cycle can be shortened.
In the fifth embodiment, in the main joining step, the contact ratio between the first metal member 110 and the auxiliary member 130 is adjusted so that the auxiliary member 130 does not remain on the first metal member 110 side.

In the removing process of the fifth embodiment, as shown in FIG. 33, by removing the auxiliary member 130 from the second metal member 120, the burr V can be removed together with the auxiliary member 130 remaining only on one side. The step of removing the burr V can be easily performed.
Further, by setting the rotation speed of the rotary tool F faster, the moving speed (feed speed) of the rotary tool F can be increased. Thereby, a joining cycle can be shortened.

As described above, in the main joining process, on which side of the traveling direction of the rotary tool F the burr V is generated depends on the joining conditions. If the auxiliary member 130 is disposed on the side where the burrs V are generated or on the side where many burrs V are generated according to the joining conditions, the step of removing the burrs V can be easily performed.

The fifth embodiment of the present invention has been described above. However, similar to the fourth embodiment, design changes can be made as appropriate without departing from the spirit of the present invention.
For example, in the auxiliary member arranging step, about 90% of the auxiliary member 130 may be arranged on the first metal member 110 and the remaining 10% of the auxiliary member 130 may be arranged on the second metal member 120. In this case, various joining conditions are set so that burrs V are generated in the auxiliary member 130 in the main joining step, and in the removing step, the auxiliary member 130 is removed from the first metal member 110, thereby V can be removed together with the auxiliary member 130. Moreover, you may abbreviate | omit both a 1st temporary joining process and a 2nd temporary joining process.

[Sixth embodiment]
Next, the auxiliary member arranging step, the main joining step, and the removing step of the joining method according to the sixth embodiment of the present invention will be described in detail with reference to FIGS.
The joining method according to the sixth embodiment differs from the fourth embodiment in that the auxiliary member 130 is in surface contact with only the first metal member 110 in the auxiliary member step, as shown in FIG. The joining method according to the sixth embodiment will be described with a focus on differences from the joining method of the fourth embodiment.

In the joining method according to the sixth embodiment, as shown in FIG. 35, the spiral groove of the stirring pin F2 is formed clockwise as it goes from the proximal end to the distal end in order to rotate the rotary tool F counterclockwise in this joining step. Has been. In the main joining step, the rotary tool F is relatively moved from the near side to the far side in FIG.

In the sixth embodiment, since the rotary tool F is rotated counterclockwise, the first metal member 110 side is the flow side of the rotary tool F. On the other hand, the second metal member 120 side is a shear side of the rotary tool F.
In the main joining process of the sixth embodiment, since the rotational speed of the rotary tool F is set high, there is a tendency that many burrs V are generated on the flow side outside the plasticizing region W1.

And in the removal process of 6th embodiment, the burr | flash V can be removed with the auxiliary member 130 by removing the auxiliary member 130 from the 1st metal member 110, as shown in FIG. That is, according to the sixth embodiment, it is only necessary to remove the auxiliary member 130 and the burr V remaining on only one side.

Although the sixth embodiment of the present invention has been described above, similar to the fourth embodiment, the design can be changed as appropriate without departing from the spirit of the present invention.
For example, in the auxiliary member arrangement step, the auxiliary member 130 may be arranged so as to be in surface contact with only the second metal member 120. In this case, various joining conditions are set so that burrs V are generated in the auxiliary member 130 in the main joining step, and in the removing step, the auxiliary member 130 is removed from the second metal member 120, so that the burrs V are generated. V can be removed together with the auxiliary member 130. Moreover, you may abbreviate | omit both a 1st temporary joining process and a 2nd temporary joining process.

[Seventh embodiment]
A joining method according to the seventh embodiment of the present invention will be described in detail with reference to FIGS. In the seventh embodiment, a plate-shaped first metal member and a second metal member having an L-shaped cross section are joined. In the joining method according to the seventh embodiment, a butting process, a temporary joining process, an auxiliary member arranging process, a main joining process, and a removing process are performed.

As shown in FIG. 37, the butting process is a process of butting a plate-like first metal member 210 and a second metal member 220 having an L-shaped cross section.
The materials of the first metal member 210 and the second metal member 220 are appropriately selected from metals capable of frictional stirring such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy.

The first metal member 210 has, for example, a rectangular flat plate shape. The first metal member 210 may be a plate material having another shape.
The second metal member 220 is a shape member having an L-shaped axial cross section. The second metal member 220 includes a vertical plate 221 and a horizontal plate 223 that protrudes toward one side from the base end portion 222 on the side surface 221a side of the vertical plate 221. That is, the horizontal plate 223 is bent at a right angle from the base end portion 222 of the vertical plate 221 (on the upper end side of the vertical plate 221 in FIG. 37) to one side.

As shown in FIG. 38, a corner portion 224 bent at a right angle is formed at the connecting portion between the vertical plate 221 and the horizontal plate 223. A curved surface curved in an arc shape is formed on the top of the outer side of the corner portion 224.
In addition, in the 2nd metal member 220 of 7th embodiment, although the height of the vertical board 221 and the horizontal width of the horizontal board 223 are formed in the same length, you may form in a different length.
Of the both

side surfaces

210a and 210b of the first metal member 210, the side surface 210a and the other side surface 221b of the vertical plate 221 of the second metal member 220 are abutted by the butting process.

In this example, since the length (depth dimension) of the first metal member 210 and the second metal member 220 is equal, the lateral end surface 210c of the first metal member 210 and the lateral end surface 225a of the second metal member 220 are the same. Are aligned so that the end face 210d and the end face 225b are also flush with each other. Further, the lower end surface 210e of the first metal member 210 and the lower end surface 221c of the vertical plate 221 in the second metal member 220 are aligned. In addition, the length (depth dimension) of the 1st metal member 210 and the 2nd metal member 220 does not need to be equal.

FIG. 38 is a vertical cross-sectional view of the first metal member 210 and the second metal member 220 that are abutted in this manner. A butted portion J21 is formed by the side surface 210a of the first metal member 210 and the base end portion 222 of the second metal member 220.

At this time, since a curved surface that is curved in an arc shape is formed on the outer top portion of the corner portion 224, between the side surface 210a of the first metal member 210 and the corner portion 224 of the second metal member 220, A substantially V-shaped gap S is formed.
Further, the end face J22 is formed by the end face 210e of the first metal member 210 and the end face 221c of the vertical plate 221 of the second metal member 220.

After the butt process, a temporary bonding process is performed. As shown in FIGS. 38 and 39, the temporary joining step is a step of temporarily joining the abutting portions J21 and J22 using a rotating tool (temporary joining rotating tool) F.

39, in the temporary joining step of the abutting portion J22, spot joining is performed by bringing only the stirring pin F2 of the rotated rotary tool F into contact with the abutting portion J22 on the distal end side. In this step, only the stirring pin F2 is pushed shallowly into the abutting portion J22 on the tip side with a predetermined interval. Then, only the stirring pin F 2 is brought into contact with the first metal member 210 and the second metal member 220. As a result, a plasticized region W0 is formed in the trace of pushing of the stirring pin F2.

The temporary joining process of the butting part J21 shown in FIG. 40 is a process of temporarily joining the butting part J21 using the rotary tool F (temporary joining rotating tool).

In this step, the first metal member 210 and the second metal member 220 are relatively turned upside down from the state shown in FIG. In this step, similarly to the temporary joining step of the butt portion J22, the plasticized region W0 is formed by pressing only the stirring pin F2 shallowly into the butt portion J21 on the base end side with a predetermined interval.

After the temporary joining step, an auxiliary member arranging step is performed. The auxiliary member arranging step is a step of arranging the auxiliary member 230 on the first metal member 210 and the second metal member 220 so as to cover the butt portion J21 as shown in FIGS.
The auxiliary member 230 is a metal plate member. The auxiliary member 230 is not particularly limited as long as it is a metal capable of friction stirring, but in the seventh embodiment, the auxiliary member 230 is made of the same material as the first metal member 210 and the second metal member 220.

The plate thickness of the auxiliary member 230 is appropriately set so that the plasticized region W does not have a metal shortage and the gap S of the butt portion J21 on the base end side is filled with metal after the main joining step described later. In the seventh embodiment, the plate thickness of the auxiliary member 230 is set to be thinner than the plate thicknesses of the first metal member 210 and the second metal member 220.

The auxiliary member 230 is arranged on the horizontal plate 223 of the second metal member 220 so as to cover the abutting portion J21 formed by the side surface 210a of the first metal member 210 and the base end portion 222 of the second metal member 220. The back surface 230 a of the auxiliary member 230 is brought into surface contact, and the end surface 230 b of the auxiliary member 230 is abutted against the side surface 210 a of the first metal member 210.

Also, the first metal member 210, the second metal member 220, and the auxiliary member 230 are restrained so as not to move by a jig (not shown). In the seventh embodiment, the auxiliary member 230 has a plate shape, but may have other shapes.

After the auxiliary member placement process, the main joining process is performed. As shown in FIGS. 43 and 44, the main joining step is a step of performing friction stir welding on the butt end portion J21 on the base end side using the rotary tool F (main welding rotary tool). Here, it is preferable that the main joining rotary tool is shared with the temporary joining rotary tool. That is, in the present embodiment, the same rotating tool F is used as the main welding rotary tool and the temporary bonding rotary tool.

A spiral groove is carved on the outer peripheral surface of the stirring pin F2. In the present embodiment, in order to rotate the rotary tool F to the right, the spiral groove is formed in a counterclockwise direction from the proximal end toward the distal end. By setting the spiral groove in this way, the metal plastically fluidized during friction stirring is guided to the tip side of the stirring pin F2 by the spiral groove. Thereby, the quantity of the metal which overflows outside the to-be-joined metal member (the 1st metal member 210, the 2nd metal member 220, and the auxiliary member 230) can be decreased. The rotary tool F is attached to, for example, an arm robot having a rotation driving means such as a spindle unit at the tip. By attaching to the arm robot, the inclination angle of the rotation center axis of the rotary tool F can be easily changed.

In the friction stir welding of the butting portion J21, the stirring pin F2 rotated to the right is inserted into the start position Sp set at the portion where the side surface 210a of the first metal member 210 and the end surface 230b of the auxiliary member 230 abut, and the butting portion The rotary tool F is relatively moved along J21. That is, with the base end side of the stirring pin F2 exposed, only the stirring pin F2 is brought into contact with the first metal member 210, the second metal member 220, and the auxiliary member 230 to perform friction stirring. Further, the traveling direction of the rotary tool F is set so that the auxiliary member 230 is positioned on the right side of the rotary tool F. In the case of FIG. 43, the rotary tool F is moved from the near side to the far side in the figure (indicated by a white arrow). As a result, a linear plasticized region W is formed on the movement locus of the rotary tool F.

As shown in FIG. 44, in the friction stirring step, the friction stir welding is performed in a state where the rotary tool F is inclined with respect to the second metal member 220 so that the connecting portion F1 does not interfere with the side surface 210a of the first metal member 210. I do. What is necessary is just to set suitably the insertion angle and insertion depth of the stirring pin F2 so that the 1st metal member 210 and the 2nd metal member 220 can be joined. In the present embodiment, the rotation center axis of the rotary tool F is inclined 45 ° toward the auxiliary member 230 with respect to the vertical plane (side surface 210a).

In this joining process, it is desirable to set joining conditions so that burrs are generated in the auxiliary member 230. In the present embodiment, since the rotational speed of the rotary tool F is set high, the friction stir welding of the butt J21 tends to generate a large amount of burrs V in the auxiliary member 230 on the flow side outside the plasticizing region W. Yes (see FIG. 44). The joining conditions of the rotary tool F and the arrangement position of the auxiliary member 230 are not limited to those described here, and may be set as appropriate.

In this way, if the joining conditions are set so that the side where the burr V is generated or the side where a large amount of burr V is generated is the auxiliary member 230, the burr V can be concentrated on the auxiliary member 230 as shown in FIG. it can. Therefore, it is preferable because a removal step described later can be easily performed. Further, by setting the rotation speed of the rotary tool F faster, the moving speed (feed speed) of the rotary tool F can be increased. As a result, the joining cycle can be shortened.

After the main joining process, the removing process is performed. In the present embodiment, the removing step is a step of removing the auxiliary member 230 from the second metal member 220. As shown in FIG. 45, in the removal step of the present embodiment, the end of the auxiliary member 230 is turned up in the direction of the arrow, and is cut out so as to be bent at the plasticized region W. Although a cutting tool etc. may be used for a removal process, in this embodiment, it removes manually. Since the burr V is formed on the auxiliary member 230, the burr V is removed together with the auxiliary member 230.

According to the joining method of the present embodiment described above, the first metal member 210 and the second metal member 220 are joined, and in addition to the first metal member 210 and the second metal member 220, the auxiliary member 230 is also used. By performing friction stir welding at the same time, metal shortage at the joint can be prevented.
Further, since the burr V generated in the friction stir welding can be removed from the metal member together with the auxiliary member 230, the process of removing the burr V is facilitated. Moreover, in this joining process, since friction stir welding is performed in a state where only the stirring pin F2 is in contact with the metal member to be joined, the load acting on the joining device can be reduced.

In the temporary joining step, the load acting on the friction stirrer can be reduced by spot joining the butted portions J21 and J22 with only the stirring pin F2 in contact with the metal member. Moreover, the process time can be shortened compared with the case where temporary joining is performed with respect to the full length of the butt portions J21 and J22 as in the prior art.

Furthermore, since the rotary tool for temporary bonding and the rotary tool for main bonding are the same rotary tool F, it is not necessary to replace the rotary tool F between the temporary bonding process and the main bonding process, thereby improving work efficiency. Can do.

[Eighth embodiment]
In the joining method according to the eighth embodiment, a butting process, a temporary joining process, an auxiliary member arranging process, a main joining process, and a removing process are performed. Since the steps other than the auxiliary member arranging step, the main joining step, and the removing step are the same as those in the seventh embodiment, detailed description thereof is omitted. Moreover, about the member similar to 7th embodiment, the same code | symbol as 8th embodiment is used, and detailed description is abbreviate | omitted.

First, as shown in FIG. 46 and FIG. 47, in the auxiliary member arranging step, so as to cover the abutting portion J 21 constituted by the side surface 210 a of the first metal member 210 and the base end portion 222 of the second metal member 220. Then, the back surface 230 a of the auxiliary member 230 is brought into surface contact with the side surface 210 a of the first metal member 210, and the end surface 230 b of the auxiliary member 230 is abutted against the base end portion 222 of the second metal member 220.

Next, the main joining process will be described. In the friction stir welding of the butting portion J21, the stirring pin F2 rotated to the right is inserted into the start position Sp set at the portion where the side surface 210a of the first metal member 210 and the end surface 230b of the auxiliary member 230 abut, and the butting portion The rotary tool (rotating tool for main joining) F is relatively moved along J21. That is, with the base end side of the stirring pin F2 exposed, only the stirring pin F2 is brought into contact with the first metal member 210, the second metal member 220, and the auxiliary member 230 to perform friction stirring. Further, the traveling direction of the rotary tool F is set so that the auxiliary member 230 is positioned on the right side of the rotary tool F. In the case of FIG. 48, the rotary tool F is moved from the back side to the front side of the drawing (indicated by a white arrow). As a result, a linear plasticized region W is formed on the movement locus of the rotary tool F. Further, the burr V is also generated mainly in the auxiliary member 230.

The removal step is a step of removing the auxiliary member 230 from the first metal member 210. Although not shown in the figure, in this embodiment as well as in the seventh embodiment, the end of the auxiliary member 230 is turned and cut off so as to be bent at the plasticized region W. Since the burr V is formed on the auxiliary member 230, the burr V is removed together with the auxiliary member 230.

According to the joining method of the present embodiment described above, the first metal member 210 and the second metal member 220 are joined, and in addition to the first metal member 210 and the second metal member 220, the auxiliary member 230 is also used. By performing friction stir welding at the same time, metal shortage at the joint can be prevented.
Further, even in the removing process of the present embodiment, since the burrs V generated by the friction stir welding can be removed from the first metal member 210 together with the auxiliary member 230, the process of removing the burrs becomes easy.
In addition, according to the eighth embodiment, the same effects as in the seventh embodiment can be achieved.

[Ninth embodiment]
In the joining method according to the ninth embodiment, a butting process, a temporary joining process, an auxiliary member arranging process, a main joining process, and a removing process are performed. In the ninth embodiment, since the steps other than the temporary joining step are the same as those in the seventh embodiment or the eighth embodiment, detailed description thereof is omitted. Moreover, about the member similar to 7th embodiment, the same code | symbol as 7th embodiment is used, and detailed description is abbreviate | omitted.

The temporary joining step of the present embodiment is a step of temporarily joining the butted portions J21 and J22 by welding as shown in FIGS. At this time, the type of welding is not particularly limited. For example, arc welding such as MIG welding (Metal Inert Gas welding), TIG welding (Tungsten Inert Gas welding), or laser welding can be used.

Numeral Y1 is a nozzle of the welding machine. In addition, the symbol Y2 located between the nozzle Y1 and the butt portions J21, J22 is an arc generated between the nozzle Y1 and the butt portions J21, J22 if welding is MIG welding or TIG welding. In the case of laser welding, the laser beam is emitted from the nozzle Y1.

When performing temporary joining using such welding, as shown in FIGS. 49 and 50, the nozzle Y1 is moved along the abutting portions J21 and J22 and welded shallowly at a predetermined interval (a shallow molten pool is formed). ) Spot bonding is performed. As a result, spot joining regions W01 that are spot-like welding regions are formed at predetermined intervals in the abutting portions J21 and J22. In MIG welding and TIG welding, welding can be performed while supplying a filler metal, and a weld metal can be formed at the butt portions J21 and J22.

According to the temporary joining process using such welding, the process time can be shortened as compared with the case where the temporary joining is performed on the entire length of the butt portions J21 and J22 as in the prior art.
In addition, according to the ninth embodiment, the same effects as those of the seventh embodiment or the eighth embodiment can be obtained.

Although the 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, different rotary tools may be used in the temporary bonding process and the main bonding process. Further, the temporary joining step may be omitted, or may be performed only on at least one of the butt portions J21 and J22.

[Tenth embodiment]
The joining method according to the tenth embodiment of the present invention will be described in detail with reference to FIGS. In the tenth embodiment, two rectangular metal plates (first metal member and second metal member) are joined. In the joining method according to the tenth embodiment, a butting process, a first provisional joining process, a second provisional joining process, an auxiliary member arranging process, a main joining process, and a removing process are performed.

As shown in FIG. 51, the butting process is a process in which the square metal first metal member 310 and the second metal member 320 are butted together.
The first metal member 310 and the second metal member 320 are plate members made of aluminum alloy. The material of the 1st metal member 310 and the 2nd metal member 320 is suitably selected from the metal which can be friction-stirred, such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, magnesium alloy, for example.
The first metal member 310 and the second metal member 320 of the tenth embodiment are formed by arranging two rectangular tube-shaped members side by side.

The first metal member 310 is a shape member having an axial cross section formed into a quadrangular ring shape. The first metal member 310 is connected to the two

vertical plates

311 and 311, the first horizontal plate 312 connected to the base end portions of the two

vertical plates

311 and 311, and the distal ends of the two

vertical plates

311 and 311. And a second horizontal plate 313.
That is, the first metal member 310 includes a first horizontal plate 312 and a second horizontal plate 313 that are connected to a distal end portion and a base end portion of an inner surface of one vertical plate 311 at a right angle, and A first horizontal plate 312 and a second horizontal plate 313 are connected to the front end portion and the base end portion of the inner surface at right angles.
As shown in FIG. 52, a corner portion 315 bent at a right angle is formed at a connection portion between the vertical plate 311 and the first horizontal plate 312 and the second horizontal plate 313. A curved surface that is curved in an arc shape is formed at the apex outside the corner portion 315.
In the first metal member 310 of the tenth embodiment, the heights of the two

vertical plates

311 and 311 and the horizontal widths of the first horizontal plate 312 and the second horizontal plate 313 are formed to be the same length. Different lengths may be formed.

As shown in FIG. 51, the second metal member 320 is a shape member having an axial cross section formed into a quadrangular ring shape, and is a rectangular tube-shaped member having the same shape as the first metal member 310. The second metal member 320 is connected to the two

vertical plates

321, 321, the first horizontal plate 322 connected to the base ends of the

vertical plates

321, 321, and the distal ends of the

vertical plates

321, 321. And a second horizontal plate 323.
As with the first metal member 310, the second metal member 320 is formed such that the heights of the two

vertical plates

321 and 321 and the horizontal widths of the first horizontal plate 322 and the second horizontal plate 323 are different from each other. May be.

In the butting process, as shown in FIG. 52, the outer surface 311a of one vertical plate 311 of the first metal member 310 (the left side surface of the left vertical plate 311 in FIG. 52) and the other vertical surface of the second metal member 320. The outer surface 321a of the plate 321 (the right side surface of the right vertical plate 321 in FIG. 52) is brought into surface contact with each other.
At this time, the back surface 312a of the first horizontal plate 312 of the first metal member 310 (the lower surface of the first horizontal plate 312 in FIG. 52) and the back surface 322a of the first horizontal plate 322 of the second metal member 320 (the first in FIG. 52). The bottom surface of one horizontal plate 322 is flush with the other.
Further, the surface 313a of the second horizontal plate 313 of the first metal member 310 (the upper surface of the second horizontal plate 313 in FIG. 52) and the surface 323a of the second horizontal plate 323 of the second metal member 320 (second in FIG. 52). The upper surface of the horizontal plate 323 is flush with the upper surface.

When one outer surface 311a of the first metal member 310 and the other outer surface 321a of the second metal member 320 are abutted by the butting step, the corner portion 315 on the proximal end side of the first metal member 310, A base end side butting portion J31 is formed by the base end side corner portion 325 of the second metal member 320.
Further, the front end side butt portion J32 is formed by the front end side corner portion 315 of the first metal member 310 and the front end side corner portion 325 of the second metal member 320.
Since the corner portion 315 of the first metal member 310 and the corner portion 325 of the second metal member 320 are curved in opposite directions, the corner portion 315 of the first metal member 310 and the corner portion 325 of the second metal member 320 are curved. Between the two, a substantially V-shaped gap S is formed.

As shown in FIG. 53, the first temporary joining step is a step of temporarily joining the abutting portion J32 on the distal end side using a rotating tool F (temporary joining rotating tool).

In the first temporary joining step, spot tacking is performed by bringing only the stirring pin F2 of the rotated rotary tool F into contact with the abutting portion J32 on the distal end side. In the first temporary joining step, only the stirring pin F2 is shallowly pushed into the abutting portion J32 on the tip side with a predetermined interval. A plasticized region W0 is formed in the trace of pushing of the stirring pin F2.
The rotary tool F is preferably attached to an arm robot (not shown) provided with a rotation drive means such as a spindle unit at the tip. Thereby, spot tacking can be performed easily.

As shown in FIG. 54, the second temporary joining step is a step of temporarily joining the base end side butt portion J31 using the rotary tool F (temporary joining rotary tool).
In the second temporary joining step, the first metal member 310 and the second metal member 320 are turned upside down and turned upside down, and spot tacking is performed on the base end side abutting portion J31 by the rotated rotary tool F. In the second temporary joining step, as in the first temporary joining step, the plasticized region W0 is formed by pushing only the stirring pin F2 shallowly into the butt end portion J31 at a predetermined interval with a predetermined interval. .

As shown in FIG. 55, the auxiliary member arranging step is a step of arranging the auxiliary member 330 on the first metal member 310 and the second metal member 320 so as to cover the butt portion J31 on the base end side.
The auxiliary member 330 is a metal plate member. The auxiliary member 330 is not particularly limited as long as it is a metal capable of friction stirring, but in the tenth embodiment, the auxiliary member 330 is made of the same material as the first metal member 310 and the second metal member 320.
The plate thickness of the auxiliary member 330 is appropriately set so that the plasticized region W does not run out of metal after the main joining step described later, and the gap S of the butt portion J31 on the base end side is filled with metal. In the tenth embodiment, the plate thickness of the auxiliary member 330 is set to be thinner than the plate thickness of the first metal member 310 and the second metal member 320.

In the auxiliary member arranging step, as shown in FIG. 56, the back surface 330b of the auxiliary member 330, the back surface 312a of the first horizontal plate 312 of the first metal member 310, and the back surface 322a of the first horizontal plate 322 of the second metal member 320. And surface contact. As a result, the abutting portion J31 on the base end side is covered by the auxiliary member 330.
Moreover, the 1st metal member 310, the 2nd metal member 320, and the auxiliary member 330 are restrained to a mount (not shown) so that a movement is impossible with a jig | tool (not shown). In the tenth embodiment, the auxiliary member 330 has a plate shape, but may have other shapes.

As shown in FIG. 57, the main joining step is a step of performing friction stir welding with respect to the butt end portion J31 on the base end side using the rotary tool F (the main welding rotary tool). In the main joining step, as shown in FIG. 58, the rotating tool F rotated to the right is inserted from the surface 330a of the auxiliary member 330, and the insertion depth of the stirring pin F2 is set so as to reach the abutting portion J31 on the proximal end side. Set.
In the main joining step, the friction stir welding is performed in a state where only the stirring pin F2 is brought into contact with the auxiliary member 330, the first metal member 310, and the second metal member 320, and the base end side of the stirring pin F2 is exposed.

Then, as shown in FIG. 57, the rotary tool F is moved along the abutting portion J31 on the base end side. Thereby, the auxiliary member 330, the first metal member 310, and the second metal member 320 are friction stir welded at the abutting portion J31 on the base end side. A plasticized region W is formed on the movement locus of the rotary tool F.
After the main joining step, as shown in FIG. 59, the auxiliary member 330 is divided into the first metal member 310 side and the second metal member 320 side by the plasticized region W. Further, burrs V and V are formed at the ends of the divided

auxiliary members

330 and 330.

The removing step is a step of removing the auxiliary member 330 from the first metal member 310 and the second metal member 320 as shown in FIG. In the removing step, the auxiliary member 330 is bent away from the first metal member 310 and the second metal member 320 by, for example, manual work, and the auxiliary member 330 is removed from the first metal member 310 and the second metal member 320. . Thereby, the first horizontal plate 312 of the first metal member 310 and the first horizontal plate 322 of the second metal member 320 are joined in a planar shape.

According to the joining method according to the tenth embodiment described above, as shown in FIG. 58, the first metal member 310 and the second metal member 320 are joined together, and the first metal member 310 and the second metal member are joined. In addition to 320, the auxiliary member 330 is also subjected to friction stir welding at the same time, thereby preventing metal shortage at the joint (plasticization region W).
In addition, by performing friction stir welding with only the stirring pin F2 of the rotary tool F in contact with the auxiliary member 330, the first metal member 310, and the second metal member 320, the load acting on the friction stirrer is reduced. be able to.
Further, in the joining method according to the tenth embodiment, as shown in FIGS. 53, 54 and 57, in the main joining step and the temporary joining step, only the stirring pin F2 of the rotary tool F is brought into contact with the metal member to cause friction. Since stirring is performed, the amount of heat input can be reduced, and the thermal strain of the first metal member 310 and the second metal member 320 can be reduced.

Further, in the joining method according to the tenth embodiment, as shown in FIG. 58, the auxiliary member 330 is disposed at the butt end J31 on the base end side, and the auxiliary member 330, the first metal member 310, and the second metal member 320 are connected. Since the friction stir welding is performed at the same time, the gap S (see FIG. 56) between the

corner portions

315 and 325 of the first metal member 310 and the second metal member 320 can be filled with the plastic fluidized metal.

Further, in the joining method according to the tenth embodiment, as shown in FIG. 59, burrs V and V are formed on the auxiliary member 330 by the main joining process. However, as shown in FIG. Can be removed together with the auxiliary member 330. Thereby, the process of removing the burr | flash V can be performed easily.
The auxiliary member 330 may be removed using a removing device or the like, but in the tenth embodiment, the auxiliary member 330 can be easily removed manually.

Further, in the joining method according to the tenth embodiment, since the temporary joining process is performed, it is possible to prevent the opening of the butt end portion J31 on the base end side and the butt end portion J32 on the distal end side when performing the main joining step. In the tenth embodiment, it is possible to prevent the opening more reliably by temporarily joining the abutting portion J32 on the distal end side.
Further, in the joining method according to the tenth embodiment, as shown in FIGS. 53 and 54, the base end side butting portion J31 and the base end side in a state where only the stirring pin F2 of the rotary tool F is in contact with the metal member. By carrying out spot tacking of the butting portion J32, the load acting on the friction stirrer can be reduced. Moreover, the process time can be shortened compared with the case where temporary joining is performed on the entire length of the butt portion as in the prior art.

In the tenth embodiment, the rotary tool F (temporary joining rotary tool) that performs the first temporary joining step and the second temporary joining step is the same as the rotary tool F (main joining rotational tool) that performs the main joining step. The rotation tool is used. Thereby, since it is not necessary to replace | exchange a rotating tool at each process, work efficiency can be improved.

Although the tenth 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, you may use the rotary tool provided with the shoulder part and the stirring pin for the rotary tool for temporary joining or the rotary tool for main joining. Further, different rotary tools may be used in the temporary joining step and the main joining step.

Further, in the tenth embodiment, as shown in FIG. 52, the corner portion 315 of the first metal member 310 and the corner portion 325 of the second metal member 320 are rounded, and the base end side butting portion J31 and the distal end are formed. Although the gap S is provided in the butt portion J32 on the side, it may be configured so that there is no gap S.

Further, in the first temporary joining step of the tenth embodiment, as shown in FIG. 53, the rotary tool F is used to temporarily join the butting portion J32 on the distal end side, but as shown in FIG. The temporary joining may be performed by welding on the butting portion J32 on the distal end side. At this time, the type of welding is not particularly limited, but for example, arc welding such as MIG welding or TIG welding or laser welding can be used. Then, spot welding is performed at a predetermined interval while bringing the welding torch H close to the abutting portion J32 on the front end side. In this way, a welding mark W2 is formed in the spot spot-attached portion.

Also, as in the modified example of the first temporary joining step, as shown in FIG. 62, in the second temporary joining step, temporary joining may be performed by welding on the base end side butt portion J31. Also in this case, the type of welding is not particularly limited. Then, spot welding is performed at a predetermined interval while bringing the welding torch H close to the abutting portion J31 on the proximal end side.

Thus, in the temporary joining step, as shown in FIGS. 61 and 62, when spot tacking is performed on the butt end portion J31 on the base end side and the butt end portion J32 on the tip end side by welding, the tacking is performed by friction stirring. The load acting on the friction stirrer can be reduced as compared with the case where the friction stirrer is performed. Further, the process time can be shortened as compared with the case where temporary joining is performed on the entire length of the base end side butting portion J31 and the distal end side butting portion J32 as in the prior art.

In the tenth embodiment, as shown in FIG. 57, the auxiliary member 330 is disposed only at the base end side abutting portion J31 and friction stir welding is performed. It may be arranged and friction stir welded.

[Eleventh embodiment]
Next, the auxiliary member arranging step, the main joining step, and the removing step of the joining method according to the eleventh embodiment of the present invention will be described in detail with reference to FIGS.
As shown in FIG. 63, the joining method according to the eleventh embodiment differs from the tenth embodiment in the ratio of arranging the auxiliary member 330 to the first metal member 310 and the second metal member 320 in the auxiliary member arranging step. To do. The joining method according to the eleventh embodiment will be described with a focus on differences from the joining method of the tenth embodiment.

In the auxiliary member arranging step of the eleventh embodiment, as shown in FIG. 63, about 90% of the auxiliary member 330 is arranged on the second metal member 320, and the remaining 10% of the auxiliary member 330 is made the first metal member. 310. That is, the auxiliary member 330 is disposed so as to slightly protrude from the rear surface 312a of the first horizontal plate 312 of the first metal member 310 with respect to the butt end J31 on the base end side.

In the main joining step of the eleventh embodiment, as shown in FIG. 64, the spiral groove is formed counterclockwise as it goes from the proximal end to the distal end in order to rotate the rotary tool F (main joining rotary tool) to the right. ing. In the main joining process, the rotary tool F is relatively moved from the near side to the far side in FIG.
In the main joining process of the eleventh embodiment, friction stir welding is performed in a state where only the stirring pin F2 of the rotating tool F rotated to the right is in contact with the auxiliary member 330, the first metal member 310, and the second metal member 320. . Accordingly, the auxiliary member 330, the first metal member 310, and the second metal member 320 are friction stir welded at the base end side butt portion J31 to form the plasticized region W.

In the eleventh embodiment, since the rotating tool F is rotated to the right, the second metal member 320 side has a moving speed of the rotating tool from the flow side of the rotating tool F (retreating side: tangential speed on the outer periphery of the rotating tool). Subtracted side). On the other hand, the first metal member 310 side is a shear side of the rotary tool F (advancing side: the side where the moving speed of the rotating tool is added to the tangential speed on the outer periphery of the rotating tool).

When the rotational speed of the rotary tool F is low, the temperature of the plastic fluidized material is likely to rise on the shear side compared to that on the flow side, so that the shear side outside the plasticization region W1 (first metal member 310 side). There is a tendency that many burrs V are generated.
On the other hand, when the rotation speed of the rotary tool F is high, the temperature of the plastic fluidized material increases on the shear side compared to the flow side, but the flow speed outside the plasticization region W1 (second) is increased by the higher rotation speed. There is a tendency that many burrs V are generated on the metal member 320 side.

In the eleventh embodiment, the moving direction and rotating direction of the rotating tool F are set so that the flow side of the rotating tool F is on the second metal member 320 side (right side of the joining center). The rotation direction and the traveling direction of the rotary tool F are not limited to those described above, and may be set as appropriate.

In the eleventh embodiment, since the rotational speed of the rotary tool F is set high, there is a tendency that many burrs V are generated on the flow side outside the plasticizing region W1. That is, the burrs V can be concentrated on the auxiliary member 330 side. Further, by setting the rotation speed of the rotary tool F faster, the moving speed (feed speed) of the rotary tool F can be increased. Thereby, a joining cycle can be shortened.
In the eleventh embodiment, in the main joining step, the contact ratio between the first metal member 310 and the auxiliary member 330 is adjusted so that the auxiliary member 330 does not remain on the first metal member 310 side.

In the removing process of the eleventh embodiment, as shown in FIG. 65, by removing the auxiliary member 330 from the second metal member 320, the burr V can be removed together with the auxiliary member 330 remaining only on one side. The step of removing the burr V can be easily performed.
Further, by setting the rotation speed of the rotary tool F faster, the moving speed (feed speed) of the rotary tool F can be increased. Thereby, a joining cycle can be shortened.

As described above, which side of the traveling direction of the rotary tool F generates the burr V during the main joining process depends on the joining conditions.
The joining conditions include the rotational speed of the rotary tool F, the rotational direction, the moving direction, the moving speed (feeding speed), the inclination angle of the stirring pin F2, the materials of the first metal member 310, the second metal member 320, and the auxiliary member 330, It is determined by each element such as the thickness of each member and a combination of these elements.
If the auxiliary member 330 is arranged on the side where the burrs V are generated or on the side where many burrs V are generated according to the joining conditions, the step of removing the burrs V can be easily performed.

Although the eleventh embodiment of the present invention has been described above, similar to the tenth embodiment, design changes can be made as appropriate within the scope of the present invention.
For example, in the auxiliary member arrangement step, about 90% of the auxiliary member 330 may be arranged on the first metal member 310 and the remaining 10% of the auxiliary member 330 may be arranged on the second metal member 320. In this case, various joining conditions are set so that the burrs V are generated in the auxiliary member 330 in the main joining step, and in the removing step, the auxiliary member 330 is removed from the first metal member 310, so that the burrs V are generated. V can be removed together with the auxiliary member 330. Moreover, you may abbreviate | omit both a 1st temporary joining process and a 2nd temporary joining process.

[Twelfth embodiment]
Next, the auxiliary member arranging step, the main joining step, and the removing step of the joining method according to the twelfth embodiment of the present invention will be described in detail with reference to FIGS. 66 to 68.
The joining method according to the third embodiment differs from the tenth embodiment in that the auxiliary member 330 is in surface contact with only the first metal member 310 in the auxiliary member step, as shown in FIG. The joining method according to the twelfth embodiment will be described focusing on differences from the joining method of the tenth embodiment.

In the joining method according to the twelfth embodiment, as shown in FIG. 67, in the main joining step, the rotating tool F is rotated counterclockwise, so that the spiral groove of the stirring pin F2 rotates clockwise as it goes from the proximal end to the distal end. Is formed. In the main joining step, the rotary tool F is relatively moved from the near side to the far side in FIG.

In the twelfth embodiment, since the rotary tool F is rotated counterclockwise, the first metal member 310 side is the flow side of the rotary tool F. On the other hand, the second metal member 320 side is a shear side of the rotary tool F.
In the main joining process of the twelfth embodiment, since the rotational speed of the rotary tool F is set high, there is a tendency that many burrs V are generated on the flow side outside the plasticized region W1.

Then, in the removing step of the twelfth embodiment, the burr V can be removed together with the auxiliary member 330 by removing the auxiliary member 330 from the first metal member 310 as shown in FIG. That is, according to the twelfth embodiment, it is only necessary to remove the auxiliary member 330 and the burr V remaining on only one side.

Although the twelfth embodiment of the present invention has been described above, similar to the twelfth embodiment, the design can be changed as appropriate without departing from the spirit of the present invention.
For example, in the auxiliary member arranging step, the auxiliary member 330 may be arranged so as to be in surface contact with only the second metal member 320. In this case, various joining conditions are set so that burrs V are generated in the auxiliary member 330 in the main joining process, and the auxiliary member 330 is removed from the second metal member 320 in the removing process. V can be removed together with the auxiliary member 330. Moreover, you may abbreviate | omit both a 1st temporary joining process and a 2nd temporary joining process.

[Thirteenth embodiment]
A joining method according to the thirteenth embodiment of the present invention will be described in detail with reference to FIGS. In the thirteenth embodiment, two metal plates (a first metal member and a second metal member) having a U-shaped cross section are joined. In the joining method according to the thirteenth embodiment, a butting process, a temporary joining process, an auxiliary member arranging process, a main joining process, and a removing process are performed.

As shown in FIG. 69, the butting step is a step of matching the first metal member 410 and the second metal member 420 having a U-shaped cross section.
The first metal member 410 and the second metal member 420 are made of aluminum alloy plate members. The material of the first metal member 410 and the second metal member 420 is appropriately selected from metals capable of friction stirring such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy.
The first metal member 410 and the second metal member 420 of the thirteenth embodiment are arranged so that the shape of the U-shaped cross section is opened in the lateral direction, and the two shapes are arranged in opposite directions. Is.

The first metal member 410 is a shape member having an axial cross section formed in a U shape. The first metal member 410 includes a vertical plate 411, a first horizontal plate 412 protruding toward one side from a base end portion of one side surface 411 a of the vertical plate 411, and a distal end portion of one side surface 411 a of the vertical plate 411. It is comprised by the 2nd horizontal plate 413 protruded toward one side.
That is, the first horizontal plate 412 is bent at a right angle from the base end portion of the vertical plate 411 (the lower end portion of the vertical plate 411 in FIG. 69) to one side, and the distal end portion of the vertical plate 411 (of the vertical plate 411 in FIG. 69). The second horizontal plate 413 is bent at a right angle from one end to the other.
As shown in FIG. 70, a corner portion 414 bent at a right angle is formed at a connection portion between the vertical plate 411, the first horizontal plate 412, and the second horizontal plate 413. A curved surface curved in an arc shape is formed on the top of the outer side of the corner portion 414.
In the first metal member 410 of the thirteenth embodiment, the height of the vertical plate 411 and the horizontal widths of the first horizontal plate 412 and the second horizontal plate 413 are formed to be the same length, but different lengths. You may form in.

As shown in FIG. 69, the second metal member 420 is a shape member having an axial cross section formed in a U shape, like the first metal member 410. The second metal member 420 includes a vertical plate 421, a first horizontal plate 422 that protrudes from the base end portion of one side surface 421 a of the vertical plate 421 toward the other side, and a distal end portion of one side surface 421 a of the vertical plate 421. The second horizontal plate 423 protrudes toward the other side.
In the second metal member 420, the height of the vertical plate 411 and the horizontal width of the first horizontal plate 412 and the second horizontal plate 413 are formed to be the same length, but may be formed to different lengths. .

The vertical dimension of the vertical plate 421 of the second metal member 420 is longer than the vertical dimension of the vertical plate 411 of the first metal member 410 as shown in FIG. In the thirteenth embodiment, the vertical dimension of the vertical plate 421 of the second metal member 420 is greater than the vertical dimension of the vertical plate 411 of the first metal member 410, and the thickness of the second horizontal plate 423 of the second metal member 420. About half of the length.

In the butting process, the first metal member 410 and the second metal member 420 are disposed in opposite directions, and as shown in FIG. 70, the other side surface 411b of the vertical plate 411 of the first metal member 410 and the second metal member The other side surface 421b of the vertical plate 421 of 420 is brought into surface contact with each other.
At this time, the back surface 412a of the first horizontal plate 412 of the first metal member 410 (the lower surface of the first horizontal plate 412 in FIG. 70) and the back surface 422a of the first horizontal plate 422 of the second metal member 420 (the first surface in FIG. 70). The lower surface of one horizontal plate 422 is flush with the other. As a result, a flat base end butt portion J41 is formed by the first horizontal plate 412 of the first metal member 410 and the first horizontal plate 422 of the second metal member 420.

When the first horizontal plate 412 of the first metal member 410 and the first horizontal plate 422 of the second metal member 420 are flush with each other, the surface 413a of the second horizontal plate 413 of the first metal member 410 (in FIG. 70). The surface 423a (the upper surface of the second horizontal plate 423 in FIG. 70) of the second horizontal plate 423 of the second metal member 420 is disposed above the upper surface of the second horizontal plate 413).
As a result, the second side plate 413 of the first metal member 410 and the second side plate 423 of the second metal member 420 form a butted portion J42 on the tip side with a step.
Since the corner portion 414 of the first metal member 410 is curved, a gap S is formed between the corner portion 414 of the first metal member 410 and the other side surface 421b of the second metal member 420.

As shown in FIG. 71, the temporary bonding step is a step of performing temporary bonding to the abutting portion J42 on the distal end side using a rotating tool F (temporary bonding rotating tool).

In the temporary joining step, spot tacking is performed by bringing only the stirring pin F2 of the rotated rotary tool F into contact with the abutting portion J42 on the distal end side. In the temporary joining step, the rotation axis of the rotary tool F is arranged perpendicular to the surface 413a of the second horizontal plate 413 of the first metal member 410 and the surface 423a of the second horizontal plate 423 of the second metal member 420. Then, only the stirring pin F2 is shallowly pushed into the abutting portion J42 on the tip side with a predetermined interval. A plasticized region W0 is formed in the trace of pushing of the stirring pin F2.
The rotary tool F is preferably attached to an arm robot (not shown) provided with a rotation drive means such as a spindle unit at the tip. Thereby, spot tacking can be performed easily.

The auxiliary member arranging step is a step of arranging the auxiliary member 430 on the first metal member 410 as shown in FIG.
The auxiliary member 430 is a metal plate member. The auxiliary member 430 is not particularly limited as long as it is a metal capable of friction stirring, but in the thirteenth embodiment, the auxiliary member 430 is made of the same material as the first metal member 410 and the second metal member 420.
As shown in FIG. 73, the plate thickness of the auxiliary member 430 is such that the plasticized region W (see FIG. 76) does not run out of metal after the main joining step described later, and the gap S of the butt portion J42 on the front end side is made of metal. Set as appropriate to fill. In the thirteenth embodiment, the auxiliary member 430 has a plate shape, but may have another shape.

In the auxiliary member arranging step, the back surface 430b of the auxiliary member 430 and the surface 413a of the second horizontal plate 413 of the first metal member 410 are brought into surface contact. Further, the end surface of the auxiliary member 430 on the second metal member 420 side is butted against the other side surface 421b of the vertical plate 421 of the second metal member 420. Thereby, the auxiliary member 430 is disposed along the abutting portion J42 on the distal end side.
In the thirteenth embodiment, the plate thickness of the auxiliary member 430 is set to about half of the thickness of the second horizontal plate 413 of the first metal member 410. Thereby, the surface 430a of the auxiliary member 430 and the surface 423a of the second horizontal plate 423 of the second metal member 420 are flush with each other.
Further, the first horizontal plate 412 of the first metal member 410 and the first horizontal plate 422 of the second metal member 420 are on the lower side, and the first metal member 410, the second metal member 420, and the auxiliary member 430 are jigs ( It is restrained by a gantry (not shown) so that it cannot move.

As shown in FIG. 74, the main joining step is a step of performing friction stir welding with respect to the abutting portion J42 on the distal end side using the rotary tool F (main welding rotary tool). In the main joining step, as shown in FIG. 75, the rotation axis of the rotary tool F is set to the surface 413a of the second horizontal plate 413 of the first metal member 410 and the surface 423a of the second horizontal plate 423 of the second metal member 420. Arrange vertically. Then, the rotation tool F rotated to the right is inserted from the surface 430a of the auxiliary member 430, and the insertion depth of the stirring pin F2 is set so as to reach the abutting portion J42 on the distal end side.
In the main joining step, the friction stir welding is performed in a state where only the stirring pin F2 is brought into contact with the auxiliary member 430, the first metal member 410, and the second metal member 420, and the proximal end side of the stirring pin F2 is exposed.

Then, as shown in FIG. 74, the rotary tool F is relatively moved along the abutting portion J42 on the front end side. Accordingly, the auxiliary member 430, the first metal member 410, and the second metal member 420 are friction stir welded at the abutting portion J42 on the distal end side. A plasticized region W is formed on the movement locus of the rotary tool F. Further, after the main joining step, as shown in FIG. 76, burrs V are formed at the end of the auxiliary member 430.

In the thirteenth embodiment, since the rotating tool F is rotated to the right, the first metal member 410 side has a moving speed of the rotating tool from the flow side of the rotating tool F (retreating side: tangential speed on the outer periphery of the rotating tool). Subtracted side). On the other hand, the second metal member 420 side is a shear side of the rotating tool F (advancing side: the side on which the moving speed of the rotating tool is added to the tangential speed on the outer periphery of the rotating tool).

When the rotational speed of the rotary tool F is low, the temperature of the plastic fluidized material is likely to rise on the shear side compared to the flow side, so the shear side outside the plasticization region W (second metal member 420 side). There is a tendency that many burrs V are generated.
On the other hand, when the rotational speed of the rotary tool F is fast, the temperature of the plastic fluidized material increases on the shear side compared to the flow side, but the flow side outside the plasticizing region W (first Many burrs V tend to occur on the metal member 410 side).

In the thirteenth embodiment, the moving direction and the rotating direction of the rotating tool F are set so that the flow side of the rotating tool F is on the first metal member 410 side (right side of the joining center). The rotation direction and the traveling direction of the rotary tool F are not limited to those described above, and may be set as appropriate.

In the thirteenth embodiment, since the rotation speed of the rotary tool F is set high, there is a tendency that many burrs V are generated on the flow side outside the plasticizing region W. That is, the burrs V can be concentrated on the auxiliary member 430 side. Further, by setting the rotation speed of the rotary tool F faster, the moving speed (feed speed) of the rotary tool F can be increased. Thereby, a joining cycle can be shortened.

As described above, which side of the traveling direction of the rotary tool F generates the burr V during the main joining process depends on the joining conditions.
The joining conditions include the rotational speed of the rotary tool F, the rotational direction, the moving direction, the moving speed (feeding speed), the inclination angle of the stirring pin F2, the material of the first metal member 410, the second metal member 420, and the auxiliary member 430, It is determined by each element such as the thickness of each member and a combination of these elements.
If the auxiliary member 430 is arranged on the side where the burrs V are generated or the side where many burrs V are generated according to the joining conditions, the step of removing the burrs V can be easily performed.

The removing step is a step of removing the auxiliary member 430 from the first metal member 410 as shown in FIG. In the removal step, the auxiliary member 430 is bent away from the first metal member 410 by, for example, manual work, and the auxiliary member 430 is removed from the first metal member 410. Thereby, the level | step-difference part between the 2nd horizontal plate 413 of the 1st metal member 410 and the 2nd horizontal plate 423 of the 2nd metal member 420 is joined.

According to the joining method according to the thirteenth embodiment described above, as shown in FIG. 75, the first metal member 410 and the second metal member 420 are joined, and the first metal member 410 and the second metal member are joined. In addition to the member 420, the auxiliary member 430 is also subjected to friction stir welding at the same time, so that metal shortage at the joint (plasticized region W) can be prevented.
Further, by performing friction stir welding with only the stirring pin F2 of the rotary tool F in contact with the auxiliary member 430, the first metal member 410, and the second metal member 420, the load acting on the friction stirrer is reduced. be able to.
Further, in the joining method according to the thirteenth embodiment, as shown in FIGS. 71 and 74, in the final joining step and the temporary joining step, only the stirring pin F2 of the rotary tool F is brought into contact with the metal member to perform friction stirring. Therefore, the amount of heat input can be reduced, and the thermal strain of the first metal member 410 and the second metal member 420 can be reduced.

Further, in the joining method according to the thirteenth embodiment, as shown in FIG. 75, the auxiliary member 430 is arranged at the abutting portion J42 on the distal end side, and the auxiliary member 430, the first metal member 410, and the second metal member 420 are connected. Since the friction stir welding is performed at the same time, the gap S (see FIG. 73) between the first metal member 410 and the second metal member 420 can be filled with the plastic fluidized metal.

Further, in the joining method according to the thirteenth embodiment, as shown in FIG. 76, the burrs V are formed on the auxiliary member 430 by the main joining step. However, as shown in FIG. The entire auxiliary member 430 can be removed. Thereby, the process of removing the burr | flash V can be performed easily.
The auxiliary member 430 may be removed using a removing device or the like, but in the thirteenth embodiment, the auxiliary member 430 can be easily removed manually.

Moreover, in the joining method according to the thirteenth embodiment, since the temporary joining process is performed, it is possible to prevent the opening of the butted portion J42 on the distal end side when performing the main joining process.
Further, in the joining method according to the thirteenth embodiment, as shown in FIG. 71, spot mounting of the abutting portion J42 on the tip side is performed with only the stirring pin F2 of the rotary tool F in contact with the metal member. Thus, the load acting on the friction stirrer can be reduced. Moreover, the process time can be shortened compared with the case where temporary joining is performed on the entire length of the butt portion as in the prior art.

Further, in the thirteenth embodiment, the same rotary tool is used for the rotary tool F (temporary joining rotary tool) that performs the temporary joining process and the rotary tool F (main joining rotational tool) that performs the main joining process. . Thereby, since it is not necessary to replace | exchange a rotating tool at each process, work efficiency can be improved.

Although the thirteenth 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, you may use the rotary tool provided with the shoulder part and the stirring pin for the rotary tool for temporary joining or the rotary tool for main joining. Further, different rotary tools may be used in the temporary joining step and the main joining step.

Further, in the thirteenth embodiment, as shown in FIG. 70, the corner portion 414 of the first metal member 410 is rounded and the gap S is provided in the abutting portion J42 on the tip side. You may comprise so that there may not be.

Further, in the main joining process of the thirteenth embodiment, as shown in FIG. 75, the rotation axis of the rotary tool F is set to the second horizontal plate 413 of the first metal member 410 and the second horizontal plate 423 of the second metal member 420. However, as shown in FIG. 78, the rotation axis of the rotary tool F may be inclined toward the first metal member 410 side. When the rotary tool F is attached to an arm robot (not shown), the rotation axis of the rotary tool F can be easily inclined.
In this way, the stirring pin F2 can be easily inserted into the inner corner formed by the surface 430a of the auxiliary member 430 and the vertical plate 421 of the second metal member 420.

Furthermore, as shown in FIG. 79, also in the temporary joining step, the surface 430a of the auxiliary member 430 and the vertical plate 421 of the second metal member 420 are inclined by tilting the rotation shaft of the rotary tool F toward the first metal member 410. The stirring pin F2 can be easily inserted into the inner corner formed by the above.

Further, in the temporary joining step of the thirteenth embodiment, as shown in FIG. 71, temporary joining is performed to the abutting portion J42 on the distal end side using the rotary tool F, but as shown in FIG. You may perform temporary joining by welding with respect to the butt | matching part J42 of the front end side. At this time, the type of welding is not particularly limited, but for example, arc welding such as MIG welding or TIG welding or laser welding can be used. Then, spot welding is performed at a predetermined interval while bringing the welding torch H close to the abutting portion J42 on the front end side. In this way, a welding mark W2 is formed in the spot spot-attached portion.

Thus, in the temporary joining process, as shown in FIG. 79, when spot tacking of the abutting portion J42 on the front end side is performed by welding, it acts on the friction stirrer more than when temporary tacking is performed by friction stirring. Can reduce the burden. Further, the process time can be shortened as compared with the conventional case where temporary joining is performed on the entire length of the abutting portion J42 on the distal end side.

Further, in the thirteenth embodiment, as shown in FIG. 71, provisional joining is performed on the distal end side abutting portion J42. However, if the proximal end abutting portion J41 is also provisionally joined, the mesh opening Can be prevented more reliably. Further, the temporary joining step may be omitted.

In the thirteenth embodiment, as shown in FIG. 75, the auxiliary member 30 is disposed only in the abutting portion J42 on the distal end side and the friction stir welding is performed, but the abutting portion J41 on the proximal end side is similarly assisted. The member 30 may be disposed and friction stir welding may be performed.

[14th embodiment]
Next, the joining method according to the fourteenth embodiment of the present invention will be described in detail with reference to FIGS. In the fourteenth embodiment, two metal plates (a first metal member and a second metal member) having a U-shaped cross section are joined. In the joining method according to the fourteenth embodiment, a butting process, a temporary joining process, an auxiliary member arranging process, a main joining process, and a removing process are performed. Note that the joining method according to the fourteenth embodiment will be described focusing on differences from the joining method of the thirteenth embodiment.

As shown in FIG. 81, the butting process is a process in which the first metal member 410 and the second metal member 420 having a U-shaped cross section are butted.
In the fourteenth embodiment, as shown in FIG. 82, the first horizontal plate 412 of the first metal member 410 and the first horizontal plate 422 of the second metal member 420 are set on the upper side, and the vertical plate of the first metal member 410 is placed. 411 and the vertical plate 421 of the second metal member 420 are abutted. That is, the first metal member 410 and the second metal member 420 (see FIG. 70) of the fourteenth embodiment are turned upside down.

As a result, the flat proximal end abutting portion J41 formed by the first horizontal plate 412 of the first metal member 410 and the first horizontal plate 422 of the second metal member 420 is disposed on the upper side, and the first metal member 410 A front end side butting portion J42 with a step due to the second horizontal plate 413 and the second horizontal plate 423 of the second metal member 420 is disposed on the lower side. In this state, the first metal member 410 and the second metal member 420 are placed on the upper surface of the gantry.

Further, the raising table 450 is interposed between the surface 413a of the second horizontal plate 413 of the first metal member 410 and the upper surface of the gantry. The raising platform 450 is formed to have the same thickness as the level difference between the second horizontal plate 413 of the first metal member 410 and the second horizontal plate 423 of the second metal member 420.
In this way, by adjusting the height of the first metal member 410 by the raising base 450, the back surface 412 a of the first horizontal plate 412 of the first metal member 410 and the first horizontal plate 422 of the second metal member 420. The back surface 422a can be flush with each other.

As shown in FIG. 83, the temporary joining step is a step of temporarily joining the base end side butting portion J41 using a rotary tool F (temporary joining rotary tool). In the temporary joining step, spot tacking is performed by bringing only the stirring pin F2 of the rotated rotary tool F into contact with the abutting portion J41 on the base end side.

The auxiliary member arranging step is a step of arranging the auxiliary member 430 on the first metal member 410 and the second metal member 420 as shown in FIG.
In the auxiliary member arranging step, as shown in FIG. 85, the back surface 430b of the auxiliary member 430, the back surface 412a of the first horizontal plate 412 of the first metal member 410, and the back surface of the first horizontal plate 422 of the second metal member 420. 422a is brought into surface contact. In this way, the auxiliary member 430 is disposed so as to cover the butt end portion J41 on the base end side.

As shown in FIG. 86, the main joining step is a step of performing friction stir welding with respect to the butt end portion J41 on the base end side using the rotary tool F (main welding rotary tool).
In the main joining step, the rotating tool F rotated to the right is inserted from the surface 430a of the auxiliary member 430, and only the stirring pin F2 is brought into contact with the auxiliary member 430, the first metal member 410, and the second metal member 420, and the stirring pin F2 Friction stir welding is performed with the base end side exposed.

Then, as shown in FIG. 87, the rotary tool F is relatively moved along the base end side abutting portion J41. Accordingly, the auxiliary member 430, the first metal member 410, and the second metal member 420 are friction stir welded at the butt end J41 on the proximal end side. A plasticized region W is formed on the movement locus of the rotary tool F.
88, the auxiliary member 430 is divided into the first metal member 410 side and the second metal member 420 side by the plasticized region W. Further, burrs V and V are formed at the ends of the divided

auxiliary members

430 and 430.

The removing step is a step of removing the auxiliary member 430 from the first metal member 410 and the second metal member 420 as shown in FIG. In the removal step, the auxiliary member 430 is bent away from the first metal member 410 and the second metal member 420 by, for example, manual work, and the auxiliary member 430 is removed from the first metal member 410 and the second metal member 420. . Thereby, the 1st horizontal plate 412 of the 1st metal member 410 and the 1st horizontal plate 422 of the 2nd metal member 420 are joined planarly.

In the joining method according to the fourteenth embodiment described above, as in the joining method according to the thirteenth embodiment, in addition to the first metal member 410 and the second metal member 420, as shown in FIG. The auxiliary member 430 is also subjected to friction stir welding at the same time, thereby preventing metal shortage at the joint.
Further, by performing friction stir welding with only the stirring pin F2 in contact with the auxiliary member 430, the first metal member 410, and the second metal member 420, the load acting on the friction stirrer can be reduced.
Also, in the joining method according to the fourteenth embodiment, as shown in FIGS. 86 and 87, only the stirring pin F2 is brought into contact with the metal member and frictionally stirred, so the amount of heat input can be reduced, The thermal distortion of the first metal member 410 and the second metal member 420 can be reduced.
In the joining method according to the fourteenth embodiment, as shown in FIG. 89, since the burr V can be removed together with the auxiliary member 430 in the removing process, the process of removing the burr V can be easily performed. .

As described above, the fourteenth embodiment of the present invention has been described. However, similar to the thirteenth embodiment, the design can be changed as appropriate without departing from the spirit of the present invention.
In the fourteenth embodiment, as shown in FIG. 86, the auxiliary member 430 is disposed only in the base end side butting portion J41 and friction stir welding is performed, but the tip side butting portion J42 is arranged in the first embodiment. Friction stir welding may be performed using this joining method. That is, you may join both the butt | matching part J41 of the base end side, and the butt | matching part J42 of the front end side.

[Fifteenth embodiment]
Next, the auxiliary member arranging step, the main joining step, and the removing step of the joining method according to the fifteenth embodiment of the present invention will be described in detail with reference to FIGS.
As shown in FIG. 90, in the joining method according to the fifteenth embodiment, the ratio of arranging the auxiliary member 430 to the first metal member 410 and the second metal member 420 in the auxiliary member arranging step is the same as that of the fourteenth embodiment. Is different. The joining method according to the fifteenth embodiment will be described focusing on the differences from the joining method of the fourteenth embodiment.

In the auxiliary member arranging step of the fifteenth embodiment, as shown in FIG. 90, about 90% of the auxiliary member 430 is arranged on the second metal member 420, and the remaining 10% of the auxiliary member 430 is made the first metal member. 410. That is, the auxiliary member 430 is disposed so as to slightly protrude from the back surface 412a of the first horizontal plate 412 of the first metal member 410 with respect to the abutting portion J41 on the base end side.

In the main joining process of the fifteenth embodiment, as shown in FIG. 91, the spiral groove is formed counterclockwise from the proximal end toward the distal end in order to rotate the rotary tool F (main joining rotary tool) to the right. ing. In the main joining step, the rotary tool F is relatively moved from the near side to the far side in FIG.
In the main joining process of the fifteenth embodiment, friction stir welding is performed in a state where only the stirring pin F2 of the rotating tool F rotated to the right is in contact with the auxiliary member 430, the first metal member 410, and the second metal member 420. . Accordingly, the auxiliary member 430, the first metal member 410, and the second metal member 420 are friction stir welded at the base end side butt portion J41 to form the plasticized region W.

In the fifteenth embodiment, since the rotary tool F is rotated to the right, the second metal member 420 side is the flow side of the rotary tool F. On the other hand, the first metal member 410 side is a shear side of the rotary tool F.
In the fifteenth embodiment, since the rotation speed of the rotary tool F is set high, there is a tendency that many burrs V are generated on the flow side outside the plasticizing region W.
In the fifteenth embodiment, in the main joining step, the contact ratio between the first metal member 410 and the auxiliary member 430 is adjusted so that the auxiliary member 430 does not remain on the first metal member 410 side.

In the removing process of the fifteenth embodiment, as shown in FIG. 92, by removing the auxiliary member 430 from the second metal member 420, the burr V can be removed together with the auxiliary member 430 remaining only on one side. The step of removing the burr V can be easily performed.

The fifteenth embodiment of the present invention has been described above, but as in the fourteenth embodiment, design changes can be made as appropriate without departing from the spirit of the present invention.
For example, in the auxiliary member arranging step, about 90% of the auxiliary member 430 may be arranged on the first metal member 410 and the remaining 10% of the auxiliary member 430 may be arranged on the second metal member 420. In this case, in the main joining step, various joining conditions are set so that burrs V are generated in the auxiliary member 430, and the second metal member 430 is not left on the second metal member 420 side. The contact ratio between the member 420 and the auxiliary member 430 is adjusted. In the removing step, the auxiliary member 430 is removed from the first metal member 410, whereby the burr V can be removed together with the auxiliary member 430.

[Sixteenth embodiment]
Next, the auxiliary member arranging step, the main joining step, and the removing step of the joining method according to the sixteenth embodiment of the present invention will be described in detail with reference to FIGS.
The joining method according to the sixteenth embodiment differs from the sixteenth embodiment in that the auxiliary member 430 is brought into surface contact with only the first metal member 410 in the auxiliary member step, as shown in FIG. The joining method according to the fifteenth embodiment will be described focusing on the differences from the joining method of the fifteenth embodiment.

In the joining method according to the sixteenth embodiment, as shown in FIG. 94, in this joining step, the rotating tool F is rotated counterclockwise, so that the spiral groove of the stirring pin F2 rotates clockwise as it goes from the proximal end to the distal end. Is formed. In the main joining step, the rotary tool F is relatively moved from the near side to the far side in FIG.

In the sixteenth embodiment, since the rotary tool F is rotated counterclockwise, the first metal member 410 side is the flow side of the rotary tool F. On the other hand, the second metal member 420 side is a shear side of the rotary tool F.
In the main joining process of the sixteenth embodiment, since the rotational speed of the rotary tool F is set high, a large number of burrs V tend to be generated on the flow side outside the plasticized region W.

Then, in the removing step of the sixteenth embodiment, the burr V can be removed together with the auxiliary member 430 by removing the auxiliary member 430 from the first metal member 410 as shown in FIG. That is, according to the sixteenth embodiment, it is only necessary to remove the auxiliary member 430 and the burr V remaining on only one side.

The sixteenth embodiment of the present invention has been described above. However, similar to the fifteenth embodiment, design changes can be made as appropriate within the scope not departing from the spirit of the present invention.
For example, in the auxiliary member arranging step, the auxiliary member 430 may be arranged so as to be in surface contact with only the second metal member 420. In this case, various joining conditions are set so that burrs V are generated in the auxiliary member 430 in the main joining process, and the auxiliary member 430 is removed from the second metal member 420 in the removing process. V can be removed together with the auxiliary member 430.

[Seventeenth embodiment]
A joining method according to the seventeenth embodiment of the present invention will be described in detail with reference to FIGS. 96 to 107. FIG. In the seventeenth embodiment, two metal plates (a first metal member and a second metal member) having a U-shaped cross section are joined. In the joining method according to the seventeenth embodiment, a butting process, a temporary joining process, an auxiliary member arranging process, a main joining process, and a removing process are performed.

As shown in FIG. 96, the butting process is a process of butting the rectangular tube-shaped first metal member 510 and the second metal member 520.
The first metal member 510 and the second metal member 520 are made of aluminum alloy plate members. The materials of the first metal member 510 and the second metal member 520 are appropriately selected from metals capable of friction stirring such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy.
The first metal member 510 and the second metal member 520 of the seventeenth embodiment are obtained by arranging two rectangular tube-shaped members side by side.

The first metal member 510 is a shape member that is formed in an annular shape with a square cross section. The first metal member 510 is connected to the two

vertical plates

511, 511, the first horizontal plate 512 connected to the base ends of both the

vertical plates

511, 511, and the distal ends of both the

vertical plates

511, 511. And a second horizontal plate 513.
That is, the first metal member 510 has a first horizontal plate 512 and a second horizontal plate 513 connected at right angles to the front end portion and the base end portion of the inner surface of one vertical plate 511, and the other vertical plate 511 The 1st horizontal plate 512 and the 2nd horizontal plate 513 are connected to the front-end | tip part and base end part of an inner surface at right angle.
As shown in FIG. 97, a corner portion 515 bent at a right angle is formed at a connection portion between the vertical plate 511, the first horizontal plate 512, and the second horizontal plate 513. A curved surface curved in an arc shape is formed on the top of the outer side of the corner portion 515.
In the first metal member 510 of the seventeenth embodiment, the heights of the two

vertical plates

511 and 511 and the horizontal widths of the first horizontal plate 512 and the second horizontal plate 513 are formed to the same length. However, they may be formed in different lengths.

As shown in FIG. 96, the second metal member 520 is a shape member having an axial cross section formed into a quadrangular ring shape, and is a rectangular tube-shaped member having the same shape as the first metal member 510. The second metal member 520 is connected to the two

vertical plates

521, 521, the first horizontal plate 522 connected to the base ends of both the

vertical plates

521, 521, and the distal ends of both the

vertical plates

521, 521. And a second horizontal plate 523.
As shown in FIG. 97, a curved surface curved in an arc shape is formed on the top of the corner plate 525 of the vertical plate 521, the first horizontal plate 522, and the second horizontal plate 523.
In the second metal member 520 of the seventeenth embodiment, the heights of the two

vertical plates

521 and 521 and the horizontal widths of the first horizontal plate 522 and the second horizontal plate 523 are formed to the same length. However, they may be formed in different lengths.

The vertical dimension of the vertical plate 521 of the second metal member 520 is longer than the vertical dimension of the vertical plate 511 of the first metal member 510 as shown in FIG. In the seventeenth embodiment, the vertical dimension of the vertical plate 521 of the second metal member 520 is greater than the vertical dimension of the vertical plate 511 of the first metal member 510, and the thickness of the second horizontal plate 523 of the second metal member 520. About half of the length.

In the butting step, the outer surface 511b of one vertical plate 511 of the first metal member 510 (the left side surface of the left vertical plate 511 in FIG. 97) and the outer surface 521b of the other vertical plate 521 of the second metal member 520 ( The right vertical plate 521 in FIG. 97 is brought into surface contact with each other.
At this time, the back surface 512a of the first horizontal plate 512 of the first metal member 510 (the lower surface of the first horizontal plate 512 in FIG. 97) and the back surface 522a of the first horizontal plate 522 of the second metal member 520 (the first back surface in FIG. 97). The lower surface of one horizontal plate 522 is flush with the other. As a result, a flat base end butt portion J51 is formed by the first horizontal plate 512 of the first metal member 510 and the first horizontal plate 522 of the second metal member 520.

When the first horizontal plate 512 of the first metal member 510 and the first horizontal plate 522 of the second metal member 520 are flush with each other, the surface 513a of the second horizontal plate 513 of the first metal member 510 (in FIG. 97). The surface 523a of the second horizontal plate 523 of the second metal member 520 (the upper surface of the second horizontal plate 523 in FIG. 97) is disposed above the upper surface of the second horizontal plate 513.
As a result, the second side plate 513 of the first metal member 510 and the second side plate 523 of the second metal member 520 form a butt end portion J52 with a step difference.
Since the corner portion 515 of the first metal member 510 is curved, a gap S is formed between the corner portion 515 of the first metal member 510 and the other side surface 521b of the second metal member 520.

As shown in FIG. 98, the temporary bonding step is a step of performing temporary bonding with respect to the abutting portion J52 on the distal end side using a rotating tool F (temporary bonding rotating tool).

In the temporary joining step, spot tacking is performed by bringing only the stirring pin F2 of the rotated rotary tool F into contact with the abutting portion J52 on the tip side. In the temporary joining step, the rotation axis of the rotary tool F is disposed perpendicular to the surface 513a of the second horizontal plate 513 of the first metal member 510 and the surface 523a of the second horizontal plate 523 of the second metal member 520. Then, only the stirring pin F2 is shallowly pushed into the abutting portion J52 on the tip side with a predetermined interval. A plasticized region W0 is formed in the trace of pushing of the stirring pin F2.
The rotary tool F is preferably attached to an arm robot (not shown) provided with a rotation drive means such as a spindle unit at the tip. Thereby, spot tacking can be performed easily.

The auxiliary member arranging step is a step of arranging the auxiliary member 530 on the first metal member 510 as shown in FIG.
The auxiliary member 530 is a metal plate member. The auxiliary member 530 is not particularly limited as long as it is a metal capable of friction stirring, but in the seventeenth embodiment, the auxiliary member 530 is made of the same material as the first metal member 510 and the second metal member 520.
As shown in FIG. 100, the thickness of the auxiliary member 530 is such that the plasticized region W (see FIG. 103) does not run out of metal after the main joining step described later, and the gap S of the butt portion J52 on the tip side is made of metal. Set as appropriate to fill. In the seventeenth embodiment, the auxiliary member 530 has a plate shape, but may have another shape.

In the auxiliary member arranging step, the back surface 530b of the auxiliary member 530 and the surface 513a of the second horizontal plate 513 of the first metal member 510 are brought into surface contact. Further, the end surface of the auxiliary member 530 on the second metal member 520 side is abutted against the outer surface 521 b of the other vertical plate 521 of the second metal member 520. Thereby, the auxiliary member 530 is disposed along the abutting portion J52 on the distal end side.
In the seventeenth embodiment, the plate thickness of the auxiliary member 530 is set to about half of the thickness of the second horizontal plate 513 of the first metal member 510. Thereby, the surface 530a of the auxiliary member 530 and the surface 523a of the second horizontal plate 523 of the second metal member 520 are flush with each other.
Also, the first metal plate 510, the second metal member 520, and the auxiliary member 530 are placed on the jig (the first horizontal plate 512 of the first metal member 510 and the first horizontal plate 522 of the second metal member 520 are on the lower side). It is restrained by a gantry (not shown) so that it cannot move.

As shown in FIG. 101, the main joining step is a step of performing friction stir welding with respect to the abutting portion J52 on the front end side using a rotary tool F (main welding rotary tool). In the main joining step, as shown in FIG. 102, the rotation axis of the rotary tool F is set to the surface 513a of the second horizontal plate 513 of the first metal member 510 and the surface 523a of the second horizontal plate 523 of the second metal member 520. Arrange vertically. Then, the rotation tool F rotated to the right is inserted from the surface 530a of the auxiliary member 530, and the insertion depth of the stirring pin F2 is set so as to reach the abutting portion J52 on the distal end side.
In the main joining step, the friction stir welding is performed in a state where only the stirring pin F2 is brought into contact with the auxiliary member 530, the first metal member 510, and the second metal member 520, and the proximal end side of the stirring pin F2 is exposed.

Then, as shown in FIG. 101, the rotary tool F is relatively moved along the abutting portion J52 on the front end side. Thereby, the auxiliary member 530, the first metal member 510, and the second metal member 520 are friction stir welded at the abutting portion J52 on the distal end side. A plasticized region W is formed on the movement locus of the rotary tool F. Further, after the main joining step, as shown in FIG. 103, burrs V are formed at the end of the auxiliary member 530.

In the seventeenth embodiment, since the rotating tool F is rotated to the right, the first metal member 510 side has a moving speed of the rotating tool from the flow side of the rotating tool F (retreating side: tangential speed on the outer periphery of the rotating tool). Subtracted side). On the other hand, the second metal member 520 side is a shear side of the rotary tool F (advancing side: the side on which the moving speed of the rotating tool is added to the tangential speed on the outer periphery of the rotating tool).

When the rotational speed of the rotary tool F is slow, the temperature of the plastic fluidized material is likely to rise on the shear side compared to the flow side, so the shear side outside the plasticization region W (second metal member 520 side). There is a tendency that many burrs V are generated.
On the other hand, when the rotational speed of the rotary tool F is fast, the temperature of the plastic fluidized material increases on the shear side compared to the flow side, but the flow side outside the plasticizing region W (first Many burrs V tend to occur on the metal member 510 side).

In the seventeenth embodiment, the moving direction and the rotating direction of the rotating tool F are set so that the flow side of the rotating tool F is the first metal member 510 side (right side of the joining center). The rotation direction and the traveling direction of the rotary tool F are not limited to those described above, and may be set as appropriate.

In the seventeenth embodiment, since the rotation speed of the rotary tool F is set high, there is a tendency that many burrs V are generated on the flow side outside the plasticizing region W. That is, the burrs V can be concentrated on the auxiliary member 530 side. Further, by setting the rotation speed of the rotary tool F faster, the moving speed (feed speed) of the rotary tool F can be increased. Thereby, a joining cycle can be shortened.

As described above, which side of the traveling direction of the rotary tool F generates the burr V during the main joining process depends on the joining conditions.
The joining conditions include the rotational speed of the rotary tool F, the rotational direction, the moving direction, the moving speed (feeding speed), the inclination angle of the stirring pin F2, the material of the first metal member 510, the second metal member 520, and the auxiliary member 530, It is determined by each element such as the thickness of each member and a combination of these elements.
If the auxiliary member 530 is arranged on the side where the burrs V are generated or on the side where many burrs V are generated according to the joining conditions, the step of removing the burrs V can be easily performed.

The removal step is a step of removing the auxiliary member 530 from the first metal member 510 as shown in FIG. In the removing step, the auxiliary member 530 is bent away from the first metal member 510 by, for example, manual work, and the auxiliary member 530 is removed from the first metal member 510. Thereby, the level | step-difference part between the 2nd horizontal plate 513 of the 1st metal member 510 and the 2nd horizontal plate 523 of the 2nd metal member 520 is joined.

According to the joining method according to the seventeenth embodiment described above, as shown in FIG. 102, the first metal member 510 and the second metal member 520 are joined, and the first metal member 510 and the second metal member are joined. In addition to the member 520, the auxiliary member 530 is also subjected to friction stir welding at the same time, thereby preventing metal shortage at the joint (plasticized region W).
Further, by performing friction stir welding with only the stirring pin F2 of the rotary tool F in contact with the auxiliary member 530, the first metal member 510 and the second metal member 520, the load acting on the friction stirrer is reduced. be able to.
Further, in the joining method according to the seventeenth embodiment, as shown in FIGS. 98 and 101, in the final joining step and the temporary joining step, only the stirring pin F2 of the rotary tool F is brought into contact with the metal member for friction stirring. Therefore, the amount of heat input can be reduced, and the thermal strain of the first metal member 510 and the second metal member 520 can be reduced.

Further, in the joining method according to the seventeenth embodiment, as shown in FIG. 102, the auxiliary member 530 is disposed at the abutting portion J52 on the distal end side, and the auxiliary member 530, the first metal member 510, and the second metal member 520 are connected. Since the friction stir welding is performed at the same time, the gap S (see FIG. 100) between the first metal member 510 and the second metal member 520 can be filled with the plastic fluidized metal.

Further, in the joining method according to the seventeenth embodiment, as shown in FIG. 103, the burr V is formed on the auxiliary member 530 by the main joining process. However, as shown in FIG. The entire auxiliary member 530 can be removed. Thereby, the process of removing the burr | flash V can be performed easily.
The auxiliary member 530 may be removed using a removing device or the like, but in the seventeenth embodiment, the auxiliary member 530 can be easily removed manually.

Moreover, in the joining method according to the seventeenth embodiment, since the temporary joining process is performed, it is possible to prevent the opening of the butted portion J52 on the distal end side when performing the main joining process.
Further, in the joining method according to the seventeenth embodiment, as shown in FIG. 98, spot mounting of the abutting portion J52 on the distal end side is performed with only the stirring pin F2 of the rotary tool F in contact with the metal member. Thus, the load acting on the friction stirrer can be reduced. Moreover, the process time can be shortened compared with the case where temporary joining is performed on the entire length of the butt portion as in the prior art.

In the seventeenth embodiment, the same rotary tool is used for the rotary tool F (temporary joining rotary tool) that performs the temporary joining process and the rotary tool F (main joining rotational tool) that performs the main joining process. . Thereby, since it is not necessary to replace | exchange a rotating tool at each process, work efficiency can be improved.

Although the seventeenth 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, you may use the rotary tool provided with the shoulder part and the stirring pin for the rotary tool for temporary joining or the rotary tool for main joining. Further, different rotary tools may be used in the temporary joining step and the main joining step.

In the seventeenth embodiment, the corner portion 515 of the first metal member 510 is rounded as shown in FIG. You may comprise so that there may not be.

Further, in the main joining process of the seventeenth embodiment, as shown in FIG. 102, the rotation axis of the rotary tool F is set to the second horizontal plate 513 of the first metal member 510 and the second horizontal plate 523 of the second metal member 520. However, as shown in FIG. 105, the rotation axis of the rotary tool F may be inclined toward the first metal member 510 side. When the rotary tool F is attached to an arm robot (not shown), the rotation axis of the rotary tool F can be easily inclined.
In this way, the agitation pin F2 can be easily inserted into the inner corner formed by the surface 530a of the auxiliary member 530 and the vertical plate 521 of the second metal member 520.

Furthermore, as shown in FIG. 106, also in the temporary joining step, the surface 530a of the auxiliary member 530 and the vertical plate 521 of the second metal member 20 are inclined by tilting the rotation shaft of the rotary tool F toward the first metal member 510. The stirring pin F2 can be easily inserted into the inner corner formed by the above.

Further, in the temporary joining step of the seventeenth embodiment, as shown in FIG. 98, the rotary tool F is used to temporarily join the butt end portion J52, but as shown in FIG. You may perform temporary joining by welding with respect to the butt | matching part J52 of the front end side. At this time, the type of welding is not particularly limited, but for example, arc welding such as MIG welding or TIG welding or laser welding can be used. Then, spot welding is performed at a predetermined interval while bringing the welding torch H close to the abutting portion J52 on the front end side. In this way, a welding mark W2 is formed in the spot spot-attached portion.

Thus, in the temporary joining step, as shown in FIG. 106, when spot spotting of the abutting portion J52 on the front end side is performed by welding, it acts on the friction stirrer more than when temporary tacking is performed by friction stirring. Can reduce the burden. Moreover, the process time can be shortened compared with the case where temporary joining is performed with respect to the entire length of the abutting portion J52 on the distal end side as in the prior art.

Further, in the seventeenth embodiment, as shown in FIG. 98, provisional joining is performed on the abutting portion J52 on the distal end side. Can be prevented more reliably. Further, the temporary joining step may be omitted.

In the seventeenth embodiment, as shown in FIG. 102, the auxiliary member 530 is disposed only in the abutting portion J52 on the distal end side and the friction stir welding is performed, but the abutting portion J51 on the proximal end side is similarly assisted. The member 530 may be disposed and friction stir welding may be performed.

[Eighteenth embodiment]
Next, the joining method according to the eighteenth embodiment of the present invention will be described in detail with reference to FIGS. In the eighteenth embodiment, two rectangular metal plates (first metal member and second metal member) are joined. In the joining method according to the eighteenth embodiment, a butting process, a temporary joining process, an auxiliary member arranging process, a main joining process, and a removing process are performed. The joining method according to the eighteenth embodiment will be described focusing on the differences from the joining method of the seventeenth embodiment.

As shown in FIG. 108, the butting step is a step of matching the first metal member 510 and the second metal member 520 having a rectangular tube shape.
In the eighteenth embodiment, as shown in FIG. 109, the first horizontal plate 512 of the first metal member 510 and the first horizontal plate 522 of the second metal member 520 are placed on the upper side, and the vertical plate of the first metal member 510 is placed. 511 and the vertical plate 521 of the second metal member 520 are abutted. That is, the first metal member 510 and the second metal member 520 (see FIG. 97) of the eighteenth embodiment are turned upside down.

As a result, the flat base end abutting portion J51 by the first horizontal plate 512 of the first metal member 510 and the first horizontal plate 522 of the second metal member 520 is disposed on the upper side, and the first metal member 510 A front end side butting portion J52 with a step between the second horizontal plate 513 and the second horizontal plate 523 of the second metal member 520 is disposed on the lower side. In this state, the first metal member 510 and the second metal member 520 are placed on the upper surface of the gantry.

Further, the raising base 550 is interposed between the surface 513a of the second horizontal plate 513 of the first metal member 510 and the upper surface of the gantry. The raising base 550 is formed to have the same thickness as the level difference between the second horizontal plate 513 of the first metal member 510 and the second horizontal plate 523 of the second metal member 520.
In this way, by adjusting the height of the first metal member 510 by the raising base 550, the back surface 512a of the first horizontal plate 512 of the first metal member 510 and the first horizontal plate 522 of the second metal member 520 are used. Can be flush with the back surface 522a.

As shown in FIG. 110, the temporary joining step is a step of temporarily joining the base end side butt portion J51 using a rotating tool F (temporary joining rotating tool). In the temporary joining step, spot tacking is performed by bringing only the stirring pin F2 of the rotated rotary tool F into contact with the abutting portion J51 on the base end side.

The auxiliary member arranging step is a step of arranging the auxiliary member 530 on the first metal member 510 and the second metal member 520 as shown in FIG.
In the auxiliary member arranging step, as shown in FIG. 112, the back surface 530b of the auxiliary member 530, the back surface 512a of the first horizontal plate 512 of the first metal member 510, and the back surface of the first horizontal plate 522 of the second metal member 520. 522a is brought into surface contact. In this way, the auxiliary member 530 is disposed so as to cover the butt end J51 on the base end side.

As shown in FIG. 113, the main joining step is a step of performing friction stir welding on the base end side butt portion J1 using the rotary tool F (the main welding rotary tool).
In the main joining step, the rotating tool F rotated to the right is inserted from the surface 530a of the auxiliary member 530, and only the stirring pin F2 is brought into contact with the auxiliary member 530, the first metal member 510, and the second metal member 520, and the stirring pin F2 Friction stir welding is performed with the base end side exposed.

Then, as shown in FIG. 114, the rotary tool F is relatively moved along the base end-side butting portion J51. As a result, the auxiliary member 530, the first metal member 510, and the second metal member 520 are friction stir welded at the abutting portion J51 on the base end side. A plasticized region W is formed on the movement locus of the rotary tool F.
After the main joining step, as shown in FIG. 115, the auxiliary member 530 is divided into the first metal member 510 side and the second metal member 520 side by the plasticizing region W. Further, burrs V and V are formed at the ends of the divided

auxiliary members

530 and 530.

The removal step is a step of removing the auxiliary member 530 from the first metal member 510 and the second metal member 520 as shown in FIG. In the removing step, the auxiliary member 530 is bent in a direction away from the first metal member 510 and the second metal member 520, for example, by manual work, and the auxiliary member 530 is removed from the first metal member 510 and the second metal member 520. . Thereby, the 1st horizontal plate 512 of the 1st metal member 510 and the 1st horizontal plate 522 of the 2nd metal member 520 are joined planarly.

In the joining method according to the eighteenth embodiment described above, as in the joining method according to the seventeenth embodiment, as shown in FIG. 114, in addition to the first metal member 510 and the second metal member 520, The auxiliary member 530 is also subjected to friction stir welding at the same time, so that a metal shortage at the joint can be prevented.
Further, by performing friction stir welding with only the stirring pin F2 in contact with the auxiliary member 530, the first metal member 510, and the second metal member 520, the load acting on the friction stirrer can be reduced.
Moreover, in the joining method according to the eighteenth embodiment, as shown in FIGS. 110 and 113, since only the stirring pin F2 is brought into contact with the metal member and frictionally stirred, the amount of heat input can be reduced, The thermal distortion of the first metal member 510 and the second metal member 520 can be reduced.
In the joining method according to the eighteenth embodiment, as shown in FIG. 116, the burr V can be removed together with the auxiliary member 530 in the removing step, and therefore the step of removing the burr V can be easily performed. .

The eighteenth embodiment of the present invention has been described above, but as in the seventeenth embodiment, design changes can be made as appropriate without departing from the spirit of the present invention.
In the eighteenth embodiment, as shown in FIG. 113, the auxiliary member 530 is disposed only in the base end side abutting portion J51 and friction stir welding is performed, but the tip end abutting portion J52 is disposed in the seventeenth embodiment. Friction stir welding may be performed using the joining method of the form. That is, you may join both the base end side butting part J51 and the front end side butting part J52.

[Nineteenth embodiment]
Next, the auxiliary member arranging step, the main joining step, and the removing step of the joining method according to the nineteenth embodiment of the present invention will be described in detail with reference to FIGS. 117 to 119.
In the joining method according to the nineteenth embodiment, as shown in FIG. 117, in the auxiliary member arranging step, the ratio of arranging the auxiliary member 530 to the first metal member 510 and the second metal member 520 is the same as that of the eighteenth embodiment. Is different. The joining method according to the nineteenth embodiment will be described with a focus on differences from the joining method of the eighteenth embodiment.

In the auxiliary member arranging step of the nineteenth embodiment, as shown in FIG. 117, about 90% of the auxiliary member 530 is arranged on the second metal member 520, and the remaining 10% of the auxiliary member 530 is made the first metal member. 510. In other words, the auxiliary member 530 is disposed so as to slightly protrude from the back surface 512a of the first horizontal plate 512 of the first metal member 510 with respect to the abutting portion J51 on the base end side.

In the main joining process of the nineteenth embodiment, as shown in FIG. 118, the spiral groove is formed counterclockwise from the proximal end toward the distal end in order to rotate the rotary tool F (main joining rotary tool) to the right. ing. In the main joining step, the rotary tool F is relatively moved from the near side to the far side in FIG.
In the main joining process of the nineteenth embodiment, friction stir welding is performed in a state where only the stirring pin F2 of the rotating tool F rotated to the right is in contact with the auxiliary member 530, the first metal member 510, and the second metal member 520. . As a result, the auxiliary member 530, the first metal member 510, and the second metal member 520 are joined by friction stir welding at the abutting portion J51 on the proximal end side to form the plasticized region W.

In the nineteenth embodiment, since the rotary tool F is rotated to the right, the second metal member 520 side is the flow side of the rotary tool F. On the other hand, the first metal member 510 side is a shear side of the rotary tool F.
In the nineteenth embodiment, since the rotation speed of the rotary tool F is set high, there is a tendency that many burrs V are generated on the flow side outside the plasticizing region W.
In the nineteenth embodiment, in the main joining step, the contact ratio between the first metal member 510 and the auxiliary member 530 is adjusted so that the auxiliary member 530 does not remain on the first metal member 510 side.

In the removing process of the nineteenth embodiment, as shown in FIG. 119, by removing the auxiliary member 530 from the second metal member 520, the burr V can be removed together with the auxiliary member 530 remaining only on one side. The step of removing the burr V can be easily performed.

The nineteenth embodiment of the present invention has been described above. However, similar to the eighteenth embodiment, design changes can be made as appropriate within the scope not departing from the spirit of the present invention.
For example, in the auxiliary member arranging step, about 90% of the auxiliary member 530 may be arranged on the first metal member 510, and the remaining 10% of the auxiliary member 530 may be arranged on the second metal member 520. In this case, in the main joining step, various joining conditions are set so that burrs V are generated in the auxiliary member 530, and the second metal member 530 is not left on the second metal member 520 side. The contact ratio between the member 520 and the auxiliary member 530 is adjusted. In the removal step, the auxiliary member 530 is removed from the first metal member 510, whereby the burr V can be removed together with the auxiliary member 530.

[20th embodiment]
Next, the auxiliary member arranging step, the main joining step, and the removing step of the joining method according to the twentieth embodiment of the present invention will be described in detail with reference to FIGS.
The joining method according to the twentieth embodiment differs from the nineteenth embodiment in that the auxiliary member 530 is brought into surface contact with only the second metal member 520 in the auxiliary member step, as shown in FIG. The joining method according to the twentieth embodiment will be described with a focus on differences from the joining method of the nineteenth embodiment.

In the joining method according to the twentieth embodiment, as shown in FIG. 121, in the main joining step, the rotating tool F is rotated counterclockwise, so that the spiral groove of the stirring pin F2 rotates clockwise as it goes from the proximal end to the distal end. Is formed. In the main joining process, the rotary tool F is relatively moved from the near side to the far side in FIG.

In the twentieth embodiment, since the rotary tool F is rotated counterclockwise, the first metal member 510 side is the flow side of the rotary tool F. On the other hand, the second metal member 520 side is a shear side of the rotary tool F.
In the main joining process of the twentieth embodiment, since the rotational speed of the rotary tool F is set high, a large number of burrs V tend to be generated on the flow side outside the plasticized region W.

And in the removal process of the twentieth embodiment, the burr V can be removed together with the auxiliary member 530 by removing the auxiliary member 530 from the first metal member 510, as shown in FIG. That is, according to the twentieth embodiment, it is only necessary to remove the auxiliary member 530 and the burr V remaining on only one side.

As described above, the twentieth embodiment of the present invention has been described. However, as in the nineteenth embodiment, the design can be changed as appropriate within the scope not departing from the spirit of the present invention.
For example, in the auxiliary member arranging step, the auxiliary member 530 may be arranged so as to be in surface contact with only the second metal member 520. In this case, various joining conditions are set so that burrs V are generated in the auxiliary member 530 in the main joining step, and in the removing step, the auxiliary member 530 is removed from the second metal member 520, so that V can be removed together with the auxiliary member 530.

DESCRIPTION OF SYMBOLS 10 1st metal member 11 Vertical plate 12 Horizontal plate 20 2nd metal member 21 Vertical plate 22 Horizontal plate 30 Auxiliary member 110 1st metal member 111 Vertical plate 112 1st horizontal plate 113 2nd horizontal plate 120 2nd metal member 121 Vertical Plate 122 First horizontal plate 123 Second horizontal plate 130 Auxiliary member 210 First metal member 210a Side surface 220 Second metal member 221 Vertical plate 221a Side surface 221b Side surface 222 Base end portion 223 Horizontal plate 230 Auxiliary member 230a Back surface 230b End surface 310 First Metal member 311 Vertical plate 312 First horizontal plate 313 Second horizontal plate 320 Second metal member 321 Vertical plate 322 First horizontal plate 323 Second horizontal plate 330 Auxiliary member 410 First metal member 411 Vertical plate 412 First horizontal plate 413 Second horizontal plate 420 Second metal member 421 Vertical plate 422 First horizontal plate 423 Second horizontal plate 430 Auxiliary member 450 Raised table 510 First metal member 511 Vertical plate 512 First horizontal plate 513 Second horizontal plate 520 Second metal member 521 Vertical plate 522 First horizontal plate 523 Second horizontal plate 530 Auxiliary member 550 Raised table F Rotation Tool F1 Connecting part F2 Stirring pin J1 Butting part J2 Butting part S Gap V Burr W Plasticization area

Claims

A joining method in which the first metal member and the second metal member are joined by friction stirring using a main welding rotary tool provided with a stirring pin,
The first metal member and the second metal member are formed in an L-shaped cross section in which a horizontal plate protrudes from a base end portion of one side surface of a vertical plate,
A butting step of butting the other side surface of the vertical plate of the first metal member and the other side surface of the vertical plate of the second metal member to form a butting portion;
An auxiliary member arranging step of arranging an auxiliary member on the first metal member and the second metal member so as to cover the abutting portion on the base end side;
The stirrer pin is inserted from the surface side of the auxiliary member, and only the stirrer pin is in contact with the auxiliary member, the first metal member, and the second metal member, along the butt portion on the base end side. A main joining step of moving the main joining rotary tool and performing friction stir welding of the auxiliary member, the first metal member and the second metal member;
And a removing step of removing the auxiliary member formed with burrs from the first metal member and the second metal member.
A joining method in which the first metal member and the second metal member are joined by friction stirring using a main welding rotary tool provided with a stirring pin,
The first metal member and the second metal member are formed in an L-shaped cross section in which a horizontal plate protrudes from a base end portion of one side surface of a vertical plate,
A butting step of butting the other side surface of the vertical plate of the first metal member and the other side surface of the vertical plate of the second metal member to form a butting portion;
Auxiliary member arrangement step of arranging an auxiliary member on the first metal member or the second metal member along the abutting portion on the base end side,
The stirrer pin is inserted from the surface side of the auxiliary member, and only the stirrer pin is in contact with the auxiliary member, the first metal member, and the second metal member, along the butt portion on the base end side. A main joining step of moving the main joining rotary tool and performing friction stir welding of the auxiliary member, the first metal member and the second metal member;
And a removing step of removing the auxiliary member formed with burrs from the first metal member or the second metal member.
2. The preliminary joining step of performing friction stir welding at a spot by inserting only a stirring pin of a rotary tool for temporary joining into the abutting portion on the base end side before the auxiliary member arranging step. Or the joining method of Claim 2.
The joining method according to claim 3, wherein the temporary joining rotary tool and the main joining rotational tool are the same rotational tool.
3. The joining method according to claim 1, further comprising a temporary joining step of joining the butt portion on the base end side with a spot by welding before the auxiliary member arranging step.
The joining method according to claim 5, wherein the welding is MIG welding, TIG welding, or laser welding.
2. The temporary joining step of performing friction stir welding at a spot by inserting only a stirring pin of a rotary tool for temporary joining into the abutting portion on the front end side before the auxiliary member arranging step. Or the joining method of Claim 2.
The joining method according to claim 7, wherein the temporary joining rotary tool and the main joining rotational tool are the same rotational tool.
The joining method according to claim 1 or 2, further comprising a temporary joining step of joining the butted portion on the distal end side with a spot by welding before the auxiliary member arranging step.
The joining method according to claim 9, wherein the welding is MIG welding, TIG welding, or laser welding.
A joining method in which the first metal member and the second metal member are joined by friction stirring using a main welding rotary tool provided with a stirring pin,
In the first metal member and the second metal member, the first horizontal plate protrudes from the base end portion of one side surface of the vertical plate, and the second horizontal plate protrudes from the distal end portion of one side surface of the vertical plate. Formed in a U-shaped cross section,
A butting step of butting the other side surface of the vertical plate of the first metal member and the other side surface of the vertical plate of the second metal member to form a butting portion;
An auxiliary member arranging step of arranging an auxiliary member on the first metal member and the second metal member so as to cover the abutting portion on the base end side;
The stirrer pin is inserted from the surface side of the auxiliary member, and only the stirrer pin is in contact with the auxiliary member, the first metal member, and the second metal member, along the butt portion on the base end side. A main joining step of moving the main joining rotary tool and performing friction stir welding of the auxiliary member, the first metal member and the second metal member;
And a removing step of removing the auxiliary member formed with burrs from the first metal member and the second metal member.
A joining method in which the first metal member and the second metal member are joined by friction stirring using a main welding rotary tool provided with a stirring pin,
In the first metal member and the second metal member, the first horizontal plate protrudes from the base end portion of one side surface of the vertical plate, and the second horizontal plate protrudes from the distal end portion of one side surface of the vertical plate. Formed in a U-shaped cross section,
A butting step of butting the other side surface of the vertical plate of the first metal member and the other side surface of the vertical plate of the second metal member to form a butting portion;
Auxiliary member arrangement step of arranging an auxiliary member on the first metal member or the second metal member along the abutting portion on the base end side,
The stirrer pin is inserted from the surface side of the auxiliary member, and only the stirrer pin is in contact with the auxiliary member, the first metal member, and the second metal member, along the butt portion on the base end side. A main joining step of moving the main joining rotary tool and performing friction stir welding of the auxiliary member, the first metal member and the second metal member;
And a removing step of removing the auxiliary member formed with burrs from the first metal member or the second metal member.
12. The temporary joining step of performing friction stir welding at a spot by inserting only a stirring pin of a rotary tool for temporary joining into the abutting portion on the base end side before the auxiliary member arranging step. Alternatively, the joining method according to claim 12.
The joining method according to claim 13, wherein the temporary joining rotary tool and the main joining rotational tool are the same rotational tool.
The joining method according to claim 11 or 12, further comprising a temporary joining step of joining the butted portion on the base end side with a spot by welding before the auxiliary member arranging step.
The joining method according to claim 15, wherein the welding is MIG welding, TIG welding, or laser welding.
12. The temporary joining step of performing friction stir welding at a spot by inserting only a stirring pin of a rotary tool for temporary joining into the abutting portion on the tip side before the auxiliary member arranging step. Alternatively, the joining method according to claim 12.
The joining method according to claim 17, wherein the temporary joining rotary tool and the main joining rotational tool are the same rotational tool.
The joining method according to claim 11 or 12, further comprising a temporary joining step of joining the butted portion on the tip side with a spot by welding before the auxiliary member arranging step.
The joining method according to claim 19, wherein the welding is MIG welding, TIG welding, or laser welding.
A joining method of joining the first metal member and the second metal member by friction stir welding using a rotating tool for main joining provided with a stirring pin,
The first metal member has a plate shape,
The second metal member is formed in an L-shaped cross section in which a horizontal plate protrudes from a base end on one side of a vertical plate,
A butting step of butting the side surface of the first metal member and the other side surface of the vertical plate of the second metal member to form a butting portion;
After the abutting step, the back surface of the auxiliary member is placed on the lateral plate of the second metal member so as to cover the abutting portion constituted by the side surface of the first metal member and the base end portion of the second metal member. Auxiliary member placement step for surface contact;
After the auxiliary member arranging step, the abutting pin is inserted from the surface side of the auxiliary member, and only the stirring pin is in contact with the auxiliary member, the first metal member, and the second metal member. A main joining step of performing friction stir welding of the auxiliary member, the first metal member and the second metal member by relatively moving the rotary tool for main joining along a portion;
After the said main joining process, the removal process of removing the said auxiliary member in which the burr | flash was formed from said 2nd metal member is included.
A joining method of joining the first metal member and the second metal member by friction stir welding using a rotating tool for main joining provided with a stirring pin,
The first metal member has a plate shape,
The second metal member is formed in an L-shaped cross section in which a horizontal plate protrudes from a base end on one side of a vertical plate,
A butting step of butting the side surface of the first metal member and the other side surface of the vertical plate of the second metal member to form a butting portion;
After the abutting step, the back surface of the auxiliary member is placed on the side surface of the first metal member so as to cover the abutting portion constituted by the side surface of the first metal member and the base end portion of the second metal member. Auxiliary member placement step for surface contact;
After the auxiliary member arranging step, the abutting pin is inserted from the surface side of the auxiliary member, and only the stirring pin is in contact with the auxiliary member, the first metal member, and the second metal member. A main joining step of performing friction stir welding of the auxiliary member, the first metal member and the second metal member by relatively moving the rotary tool for main joining along a portion;
After the said main joining process, the removal process which removes the said auxiliary member in which the burr | flash was formed from said 1st metal member is included, The joining method characterized by the above-mentioned.
Prior to the auxiliary member arranging step, friction stir by inserting only the stirring pin of the rotary tool for temporary joining into the butt portion constituted by the side surface of the first metal member and the base end portion of the second metal member. The joining method according to claim 21, further comprising a temporary joining step of performing spot joining by joining.
The joining method according to claim 23, wherein the temporary joining rotary tool and the main joining rotational tool are the same rotational tool.
Before the auxiliary member arranging step, it includes a temporary joining step of spot joining by welding to the butt portion constituted by a side surface of the first metal member and a base end portion of the second metal member. The joining method according to claim 21 or claim 22.
The joining method according to claim 25, wherein the welding is MIG welding, TIG welding, or laser welding.
Prior to the auxiliary member placement step, only the stirring pin of the temporary tool for rotation is inserted into the butt portion constituted by the tip of the first metal member and the tip of the vertical plate of the second metal member, and friction is caused. The joining method according to claim 21 or 22, further comprising a temporary joining step of performing spot joining by stirring joining.
28. The joining method according to claim 27, wherein the temporary joining rotary tool and the main joining rotational tool are the same rotational tool.
Before the auxiliary member arranging step, a temporary joining step of spot joining by welding is performed on the butt portion constituted by the tip of the first metal member and the tip of the vertical plate of the second metal member. The joining method according to claim 21 or claim 22.
30. The joining method according to claim 29, wherein the welding is MIG welding, TIG welding, or laser welding.
A joining method in which the first metal member and the second metal member are joined by friction stirring using a main welding rotary tool provided with a stirring pin,
In the first metal member and the second metal member, a first horizontal plate is connected to a base end portion of two vertical plates, and a second horizontal plate is connected to a distal end portion of the two vertical plates. It is formed in a square tube shape,
A butting step of butting one outer surface of the first metal member and the other outer surface of the second metal member to form a butting portion;
An auxiliary member arranging step of arranging an auxiliary member on the first metal member and the second metal member so as to cover the butt portion on the base end side;
The stirrer pin is inserted from the surface side of the auxiliary member, and only the stirrer pin is in contact with the auxiliary member, the first metal member, and the second metal member, along the butted portion on the base end side. A main joining step of moving the main joining rotary tool and performing friction stir welding of the auxiliary member, the first metal member and the second metal member;
A removing step of removing the auxiliary member formed with burrs from the first metal member and the second metal member.
A joining method in which the first metal member and the second metal member are joined by friction stirring using a main welding rotary tool provided with a stirring pin,
In the first metal member and the second metal member, a first horizontal plate is connected to a base end portion of two vertical plates, and a second horizontal plate is connected to a distal end portion of the two vertical plates. It is formed in a square tube shape,
A butting step of butting one outer surface of the first metal member and the other outer surface of the second metal member to form a butting portion;
Auxiliary member arrangement step of arranging an auxiliary member on the first metal member or the second metal member along the butt portion on the base end side,
The stirrer pin is inserted from the surface side of the auxiliary member, and only the stirrer pin is in contact with the auxiliary member, the first metal member, and the second metal member, along the butted portion on the base end side. A main joining step of moving the main joining rotary tool and performing friction stir welding of the auxiliary member, the first metal member and the second metal member;
Removing the auxiliary member formed with burrs from the first metal member or the second metal member.
32. A temporary joining step of performing friction stir welding at a spot by inserting only a stirring pin of a rotary tool for temporary joining into the abutting portion on the base end side before the auxiliary member arranging step. Or the joining method of Claim 32.
34. The joining method according to claim 33, wherein the temporary joining rotary tool and the main joining rotational tool are the same rotational tool.
The joining method according to claim 31 or 32, further comprising a temporary joining step of joining the butt portion on the base end side with a spot by welding before the auxiliary member arranging step.
36. The joining method according to claim 35, wherein the welding is MIG welding, TIG welding, or laser welding.
32. A temporary joining step of performing friction stir welding at a spot by inserting only a stirring pin of a rotary tool for temporary joining into the abutting portion on the tip side before the auxiliary member arranging step. Or the joining method of Claim 32.
38. The joining method according to claim 37, wherein the temporary joining rotary tool and the main joining rotational tool are the same rotational tool.
The joining method according to claim 31 or 32, further comprising a temporary joining step of joining the butted portion on the tip side with a spot by welding before the auxiliary member arranging step.
40. The joining method according to claim 39, wherein the welding is MIG welding, TIG welding, or laser welding.
A joining method in which the first metal member and the second metal member are joined by friction stirring using a main welding rotary tool provided with a stirring pin,
In the first metal member and the second metal member, the first horizontal plate protrudes from the base end portion of one side surface of the vertical plate, and the second horizontal plate protrudes from the distal end portion of one side surface of the vertical plate. Formed in a U-shaped cross section,
The vertical dimension of the vertical plate of the second metal member is formed longer than the vertical dimension of the vertical plate of the first metal member,
The other side surface of the vertical plate of the first metal member and the other side surface of the vertical plate of the second metal member are abutted against each other, the first horizontal plate of the first metal member, and the second metal The first lateral plate of the member is abutted flush with the second lateral plate of the first metal member and the second lateral plate of the second metal member and a butted portion on the front end side with a step difference A butt process to form
An auxiliary member arranging step of arranging an auxiliary member on the surface of the second horizontal plate of the first metal member and abutting an end surface of the auxiliary member with the other side surface of the vertical plate of the second metal member;
The stirring pin is inserted from the surface side of the auxiliary member, and only the stirring pin is in contact with the auxiliary member, the first metal member, and the second metal member, along the butted portion on the tip side. A main joining step of performing a friction stir welding of the auxiliary member, the first metal member and the second metal member by relatively moving the rotary tool for the main joining;
Removing the auxiliary member formed with burrs from the first metal member.
In the main joining step, the main welding rotary tool is relatively moved along the abutting portion on the front end side in a state where the rotation axis of the main welding rotary tool is inclined toward the first metal member. The joining method according to claim 41, wherein friction stir welding of the auxiliary member, the first metal member, and the second metal member is performed.
42. A temporary joining step of performing friction stir welding at a spot by inserting only a stirring pin of a rotary tool for temporary joining into the abutting portion on the distal end side before the auxiliary member arranging step. The joining method according to claim 42.
44. The joining method according to claim 43, wherein the temporary joining rotary tool and the main joining rotational tool are the same rotational tool.
In the temporary joining step, only the stirring pin of the rotary tool for temporary joining is inserted into the abutting portion on the distal end side with the rotation axis of the rotary tool for temporary joining inclined to the first metal member side. 45. The joining method according to claim 43 or 44, wherein the friction stir welding is performed with a spot.
43. The joining method according to claim 41 or 42, further comprising a provisional joining step of joining the butted portion on the distal end side with a spot by welding before the auxiliary member arranging step.
The joining method according to claim 46, wherein the welding is MIG welding, TIG welding, or laser welding.
A joining method in which the first metal member and the second metal member are joined by friction stirring using a main welding rotary tool provided with a stirring pin,
In the first metal member and the second metal member, the first horizontal plate protrudes from the base end portion of one side surface of the vertical plate, and the second horizontal plate protrudes from the distal end portion of one side surface of the vertical plate. Formed in a U-shaped cross section,
The vertical dimension of the vertical plate of the second metal member is formed longer than the vertical dimension of the vertical plate of the first metal member,
The other side surface of the vertical plate of the first metal member and the other side surface of the vertical plate of the second metal member are abutted against each other, the first horizontal plate of the first metal member, and the second metal A butting step of forming a butt end portion on the base end side which is flush with the first horizontal plate of the member;
An auxiliary member arranging step of arranging an auxiliary member on the first metal member and the second metal member so as to cover the butt portion on the base end side;
The stirrer pin is inserted from the surface side of the auxiliary member, and only the stirrer pin is in contact with the auxiliary member, the first metal member, and the second metal member, along the butted portion on the base end side. A main joining step of performing a friction stir welding of the auxiliary member, the first metal member and the second metal member by relatively moving the rotary tool for main joining,
A removing step of removing the auxiliary member formed with burrs from the first metal member and the second metal member.
A joining method in which the first metal member and the second metal member are joined by friction stirring using a main welding rotary tool provided with a stirring pin,
In the first metal member and the second metal member, the first horizontal plate protrudes from the base end portion of one side surface of the vertical plate, and the second horizontal plate protrudes from the distal end portion of one side surface of the vertical plate. Formed in a U-shaped cross section,
The vertical dimension of the vertical plate of the second metal member is formed longer than the vertical dimension of the vertical plate of the first metal member,
The other side surface of the vertical plate of the first metal member and the other side surface of the vertical plate of the second metal member are abutted against each other, the first horizontal plate of the first metal member, and the second metal A butting step of forming a butt end portion on the base end side which is flush with the first horizontal plate of the member;
Auxiliary member arrangement step of arranging an auxiliary member on the first metal member or the second metal member along the butt portion on the base end side,
The stirrer pin is inserted from the surface side of the auxiliary member, and only the stirrer pin is in contact with the auxiliary member, the first metal member, and the second metal member, along the butted portion on the base end side. A main joining step of performing a friction stir welding of the auxiliary member, the first metal member and the second metal member by relatively moving the rotary tool for main joining,
Removing the auxiliary member formed with burrs from the first metal member or the second metal member.
49. A temporary joining step of performing friction stir welding at a spot by inserting only a stirring pin of a rotary tool for temporary joining into the abutting portion on the base end side before the auxiliary member arranging step. Or the joining method of Claim 49.
51. The joining method according to claim 50, wherein the temporary joining rotary tool and the main joining rotational tool are the same rotational tool.
The joining method according to claim 48 or 49, further comprising a temporary joining step of joining the butted portion on the base end side with a spot by welding before the auxiliary member arranging step.
53. The joining method according to claim 52, wherein the welding is MIG welding, TIG welding, or laser welding.
A joining method in which the first metal member and the second metal member are joined by friction stirring using a main welding rotary tool provided with a stirring pin,
In the first metal member and the second metal member, a first horizontal plate is connected to a base end portion of two vertical plates, and a second horizontal plate is connected to a distal end portion of the two vertical plates. It is formed in a square tube shape,
The vertical dimension of the vertical plate of the second metal member is formed longer than the vertical dimension of the vertical plate of the first metal member,
One outer surface of the first metal member and the other outer surface of the second metal member are abutted against each other, the first horizontal plate of the first metal member, and the first horizontal surface of the second metal member. A butting step of abutting a plate flush with each other and forming a butting portion on the tip side with a step by the second horizontal plate of the first metal member and the second horizontal plate of the second metal member; ,
An auxiliary member is disposed on a surface of the second horizontal plate of the first metal member, and an end surface of the auxiliary member is abutted against the other outer surface of the vertical plate of the second metal member; and
The stirring pin is inserted from the surface side of the auxiliary member, and only the stirring pin is in contact with the auxiliary member, the first metal member, and the second metal member, along the butted portion on the tip side. A main joining step of performing a friction stir welding of the auxiliary member, the first metal member and the second metal member by relatively moving the rotary tool for the main joining;
Removing the auxiliary member formed with burrs from the first metal member.
In the main joining step, the main welding rotary tool is relatively moved along the abutting portion on the front end side in a state where the rotation axis of the main welding rotary tool is inclined toward the first metal member. 55. The joining method according to claim 54, wherein friction stir welding of the auxiliary member, the first metal member, and the second metal member is performed.
55. A temporary joining step of performing friction stir welding at a spot by inserting only a stirring pin of a rotary tool for temporary joining into the abutting portion on the front end side before the auxiliary member arranging step. The joining method according to claim 55.
57. The joining method according to claim 56, wherein the temporary joining rotating tool and the main joining rotating tool are the same rotating tool.
In the temporary joining step, only the stirring pin of the rotary tool for temporary joining is inserted into the abutting portion on the distal end side with the rotation axis of the rotary tool for temporary joining inclined to the first metal member side. 58. The joining method according to claim 56 or 57, wherein friction stir welding is performed using a spot.
56. The joining method according to claim 54 or 55, further comprising a provisional joining step of joining the butted portion on the distal end side with a spot by welding before the auxiliary member arranging step.
60. The joining method according to claim 59, wherein the welding is MIG welding, TIG welding, or laser welding.
A joining method in which the first metal member and the second metal member are joined by friction stirring using a main welding rotary tool provided with a stirring pin,
In the first metal member and the second metal member, a first horizontal plate is connected to a base end portion of two vertical plates, and a second horizontal plate is connected to a distal end portion of the two vertical plates. It is formed in a square tube shape,
The vertical dimension of the vertical plate of the second metal member is formed longer than the vertical dimension of the vertical plate of the first metal member,
One outer surface of the first metal member and the other outer surface of the second metal member are abutted against each other, the first horizontal plate of the first metal member, and the first horizontal surface of the second metal member. A butting step of forming a butting portion on the base end side that is flush with the plate;
An auxiliary member arranging step of arranging an auxiliary member on the first metal member and the second metal member so as to cover the butt portion on the base end side;
The stirrer pin is inserted from the surface side of the auxiliary member, and only the stirrer pin is in contact with the auxiliary member, the first metal member, and the second metal member, along the butted portion on the base end side. A main joining step of performing a friction stir welding of the auxiliary member, the first metal member and the second metal member by relatively moving the rotary tool for main joining,
A removing step of removing the auxiliary member formed with burrs from the first metal member and the second metal member.
A joining method in which the first metal member and the second metal member are joined by friction stirring using a main welding rotary tool provided with a stirring pin,
In the first metal member and the second metal member, a first horizontal plate is connected to a base end portion of two vertical plates, and a second horizontal plate is connected to a distal end portion of the two vertical plates. It is formed in a square tube shape,
The vertical dimension of the vertical plate of the second metal member is formed longer than the vertical dimension of the vertical plate of the first metal member,
One outer surface of the first metal member and the other outer surface of the second metal member are abutted against each other, the first horizontal plate of the first metal member, and the first horizontal surface of the second metal member. A butting step of forming a butting portion on the base end side that is flush with the plate;
Auxiliary member arrangement step of arranging an auxiliary member on the first metal member or the second metal member along the butt portion on the base end side,
The stirrer pin is inserted from the surface side of the auxiliary member, and only the stirrer pin is in contact with the auxiliary member, the first metal member, and the second metal member, along the butted portion on the base end side. A main joining step of performing a friction stir welding of the auxiliary member, the first metal member and the second metal member by relatively moving the rotary tool for main joining,
Removing the auxiliary member formed with burrs from the first metal member or the second metal member.
62. A temporary joining step of performing friction stir welding at a spot by inserting only a stirring pin of a rotary tool for temporary joining into the abutting portion on the base end side before the auxiliary member arranging step. Or, the joining method according to claim 62.
64. The joining method according to claim 63, wherein the temporary joining rotary tool and the main joining rotational tool are the same rotational tool.
The joining method according to claim 61 or 62, further comprising a temporary joining step of joining the butt portion on the proximal end side with a spot by welding before the auxiliary member arranging step.
The joining method according to claim 65, wherein the welding is MIG welding, TIG welding, or laser welding.