WO2017221684A1 - Procédé d'assemblage - Google Patents

Procédé d'assemblage Download PDF

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Publication number
WO2017221684A1
WO2017221684A1 PCT/JP2017/020872 JP2017020872W WO2017221684A1 WO 2017221684 A1 WO2017221684 A1 WO 2017221684A1 JP 2017020872 W JP2017020872 W JP 2017020872W WO 2017221684 A1 WO2017221684 A1 WO 2017221684A1
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WO
WIPO (PCT)
Prior art keywords
metal member
joining
friction
auxiliary
metal
Prior art date
Application number
PCT/JP2017/020872
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English (en)
Japanese (ja)
Inventor
堀　久司
伸城 瀬尾
Original Assignee
日本軽金属株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2016121683A external-priority patent/JP6662210B2/ja
Priority claimed from JP2016186433A external-priority patent/JP2018051563A/ja
Priority claimed from JP2016239275A external-priority patent/JP6809182B2/ja
Priority claimed from JP2017000452A external-priority patent/JP2018108595A/ja
Priority claimed from JP2017011000A external-priority patent/JP2018118275A/ja
Application filed by 日本軽金属株式会社 filed Critical 日本軽金属株式会社
Priority to CN201780005943.5A priority Critical patent/CN108430687B/zh
Publication of WO2017221684A1 publication Critical patent/WO2017221684A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding

Definitions

  • the present invention relates to a joining method in which metal members are friction stir welded together.
  • Patent Documents 1 and 2 disclose a technique in which metal members are butted in a T shape when viewed from the front, and the butted portion is friction stir welded.
  • a rotating tool is inserted from the surface side of the second metal member, and the butted portion is friction stir welded.
  • Patent Document 3 discloses a technique for performing friction stir welding of a butted portion by inserting only a stirring pin of a rotating tool into inner corners of metal members vertically butted.
  • the conventional rotary tool of the friction stir welding method does not include a shoulder portion, and only the stirring pin of the rotary tool is inserted into the inner corner, so that the friction stir can be performed up to a deep position of the butt portion.
  • the conventional technique is a form in which the first metal member is inserted into the concave groove of the second metal member, there is a problem that the positions of the metal members are shifted in the longitudinal direction of the first metal member during friction stir welding. Moreover, at the time of friction stir welding, there exists a possibility that it may leave
  • an object of the present invention is to provide a joining method that can reduce the load applied to the friction stirrer and has a high degree of design freedom. Moreover, this invention makes it a subject to provide the joining method which can improve the joining precision while reducing the load concerning a friction stirrer, and can make the thermal strain of each metal member small. Moreover, this invention makes it a subject to provide the joining method which can eliminate the metal shortage of an inner corner, when carrying out friction stir welding of the inner corner of metal members.
  • the present invention is a joining method for joining a first metal member and a second metal member using a rotary tool provided with a stirring pin, and includes an end face of the first metal member, A butting step of butting the back surface of the second metal member to form a butting portion, an arrangement step of placing an auxiliary member at a position corresponding to the first metal member on the surface of the second metal member, and rotation
  • the stirring pin was inserted from the surface side of the auxiliary member, and only the stirring pin was brought into contact with the second metal member and the auxiliary member, or the first metal member, the second metal member, and the auxiliary member.
  • a friction stir process in which the abutting portion is friction stir welded by relatively moving the rotary tool in a state.
  • the friction stir welding is performed in a state where only the stirring pin is in contact with the second metal member and the auxiliary member, or the first metal member, the second metal member and the auxiliary member.
  • the load on the friction stirrer can be reduced.
  • the width of the plasticized region can be reduced.
  • the auxiliary member can also be friction stir welded to prevent metal shortage at the joint.
  • a removing step of removing the auxiliary member on which the burr is formed from the second metal member it is preferable to include a removing step of removing the auxiliary member on which the burr is formed from the second metal member. According to this joining method, the burr can be easily removed together with the auxiliary member.
  • the stirring pin in the center of the auxiliary member. According to this joining method, the rotating tool can be easily inserted into the auxiliary member.
  • the auxiliary member is placed only on one side with respect to the joining reference line, and in the friction stirring step, It is preferable to set a joining condition so that the burr is generated in the auxiliary member.
  • burrs can be concentrated on the auxiliary member arranged only on one side with respect to the joining reference line, the burrs can be more easily removed.
  • the auxiliary member is arranged to straddle the joining reference line in the placement step and the friction stirring step, and the joining reference line
  • the burr is generated in the auxiliary member on one side, and the arrangement position and joining conditions of the auxiliary member are set so that the auxiliary member does not remain on the other side after the friction stirring step.
  • the present invention only includes an abutting step in which an end face of the plate-like first metal member and an underside of the plate-like second metal member are abutted to form an abutting portion, and an agitating pin of a rotating tool for temporary bonding that rotates.
  • abutting step in which an end face of the plate-like first metal member and an underside of the plate-like second metal member are abutted to form an abutting portion, and an agitating pin of a rotating tool for temporary bonding that rotates.
  • the metal members are temporarily spot-joined in the provisional joining step, the metal members can be separated from each other and misalignment can be prevented during the main joining step. Thereby, joining accuracy can be raised. Moreover, since only the stirring pin is inserted into each metal member in both the main joining step and the temporary joining step, the amount of heat input can be reduced, and the thermal strain of each metal member can be reduced. Moreover, since only the stirring pin is inserted into each metal member in both the main joining step and the temporary joining step, the load on the friction stirrer can be reduced.
  • the rotary tool for temporary joining and the rotary tool for main joining are the same. According to this joining method, it is not necessary to replace the rotary tool during the temporary joining step and the main joining step, so that the working efficiency can be improved.
  • the present invention also includes a butting step of butting the end surface of the plate-shaped first metal member and the back surface of the plate-shaped second metal member to form a butting portion, the first metal member, and the second metal member.
  • a temporary joining step for performing spot temporary joining by welding along an inner corner constituted by the above, and a rotating tool for main joining to be rotated is inserted from the surface side of the second metal member, and the rotating tool for main joining is agitated.
  • the rotational tool for relative welding is relatively moved to friction stir weld the butt portion. And a main joining step.
  • the metal members are temporarily spot-joined in the provisional joining step, the metal members can be separated from each other and misalignment can be prevented during the main joining step. Thereby, joining accuracy can be raised.
  • spot temporary bonding is performed in the temporary bonding process, and only the stirring pin is inserted into each metal member in the main bonding process. Therefore, the amount of heat input can be reduced, and the thermal strain of each metal member can be decreased.
  • the load concerning a friction stirring apparatus can be made small.
  • the welding is preferably TIG welding, MIG welding or laser welding.
  • the present invention provides a butt portion by inserting the end surface of the plate-like second metal member into the groove of the first metal member having a plate shape and having a groove on the back surface, and butting the end surface against the bottom surface of the groove.
  • the inner corners are friction stir welded in contact with the material, and the stir pin is only the first metal member or both the first metal member and the second metal member in the butt friction friction stir step.
  • the butt portion is friction stir welded in a state in which the butt portion is brought into contact with.
  • the auxiliary member is disposed in the inner corner, and the friction stir welding of the inner corner is performed via the auxiliary member.
  • the friction stir welding is performed at the inner corner, it is possible to prevent the first metal member and the second metal member from being displaced or separated from each other during the abutting portion friction stirring step.
  • spacing of a 1st metal member and a 2nd metal member can be prevented.
  • the thickness of the portion of the first metal member where the concave groove is formed is thinner than the thickness of the other portion. .
  • Bonding can be performed.
  • the stirring pin of the rotating tool is inserted from the surface of the first metal member, and only the stirring pin is only the first metal member, or the first metal member and the first metal member.
  • the butt portion is preferably friction stir welded while being in contact with both of the two metal members.
  • the rotating tool has a shoulder portion having a cylindrical shape and an agitating pin depending from the shoulder portion, and the diameter of the shoulder portion is set smaller than the width of the concave groove. It is preferable.
  • a removing step of removing the auxiliary member on which the burr is formed from the first metal member or the second metal member is preferable to include a removing step of removing the auxiliary member on which the burr is formed from the first metal member or the second metal member.
  • the joining conditions of the rotating tool it is preferable to set the joining conditions of the rotating tool so that burrs generated in the friction stir welding are formed on the auxiliary member. Thereby, a burr
  • the present invention provides a plate-like end surface of the first metal member that has a notched corner on the back surface and a plate-shaped end surface of the third metal member that has a notched corner on the back surface.
  • An auxiliary member is disposed at an inner corner formed by the back surface of the first metal member and the side surface of the second metal member, and is formed by the back surface of the third metal member and the side surface of the second metal member.
  • the inner corner is friction stir welded, and in the butt friction friction stir step, the stir pin is only the first metal member and the third metal member, or the first metal member, the third metal member and the first The first butted portion and the second butted portion are friction stir welded while being in contact with a bimetallic member.
  • the auxiliary member is disposed in the inner corner, and the friction stir welding of the inner corner is performed via the auxiliary member.
  • the friction stir welding is performed at the inner corner, the positions of the first metal member and the second metal member and the third metal member and the second metal member at the time of the butt portion friction stirring step Deviation and separation can be prevented.
  • spacing of a 1st metal member, a 2nd metal member, and a 3rd metal member can be prevented.
  • groove is formed is thinner than the plate
  • this invention is a joining method which joins a 1st metal member and a 2nd metal member using the rotary tool provided with the stirring pin, Comprising: The said ditch
  • the friction stir welding is performed in a state where only the stirring pin is in contact with the second metal member and the auxiliary member, or the first metal member, the second metal member and the auxiliary member.
  • the load on the friction stirrer can be reduced.
  • the width of the plasticized region can be reduced.
  • the auxiliary member can also be friction stir welded to prevent metal shortage at the joint.
  • a removing step of removing the auxiliary member on which the burr is formed from the second metal member it is preferable to include a removing step of removing the auxiliary member on which the burr is formed from the second metal member. According to this joining method, the burr can be easily removed together with the auxiliary member.
  • the stirring pin in the center of the auxiliary member. According to this joining method, the rotating tool can be easily inserted into the auxiliary member.
  • the auxiliary member is placed only on one side with respect to the joining reference line, and in the friction stirring step, It is preferable to set a joining condition so that the burr is generated in the auxiliary member.
  • the present invention is a joining method for joining a first metal member, a second metal member, and a third metal member using a rotary tool equipped with a stirring pin,
  • the end surface of the second metal member that has a shape and has a corner on the back side cut out, and the end surface of the third metal member that has a plate shape and has a corner on the back side cut out to form a groove and a first butt A step of forming a second abutting portion by forming a second abutting portion by inserting an end surface of the plate-like first metal member into the concave groove and abutting the end surface against the bottom surface of the concave groove; And arranging the auxiliary member at a position corresponding to the first metal member among the surfaces of the third metal member, and inserting the stirring pin of the rotary tool from the surface side of the auxiliary member, Are moved relative to each other along the groove, and the first A friction stirring step of friction stir welding the mating portion and the second but
  • the stirring pin is in contact with the second metal member, the third metal member and the auxiliary member, or the second metal member, the third metal member, the first metal member and the auxiliary member. Since the friction stir welding is performed, the load applied to the friction stirrer can be reduced as compared with the prior art. Moreover, since only the stirring pin is inserted, the width of the plasticized region can be reduced. Thereby, since the plate
  • the end surface of the first metal member is inserted into the groove formed by abutting the second metal member and the third metal member and the end surface is abutted against the bottom surface of the groove, Position shift between the second metal member and the third metal member can be prevented.
  • a removing step of removing the auxiliary member on which the burr is formed from the second metal member and the third metal member it is preferable to include a removing step of removing the auxiliary member on which the burr is formed from the second metal member and the third metal member. According to this joining method, the burr can be easily removed together with the auxiliary member.
  • the stirring pin in the center of the auxiliary member. According to this joining method, the rotating tool can be easily inserted into the auxiliary member.
  • the auxiliary member is arranged only on one side with respect to the first butting portion, and in the friction stirring step, a joining condition is set so that the burr is generated in the auxiliary member. preferable.
  • burrs can be concentrated on the auxiliary member arranged only on one side with respect to the first butting portion, the burrs can be more easily removed.
  • the auxiliary member is arranged so as to straddle the first abutting portion, and the burr is generated in the auxiliary member on one side with respect to the first abutting portion, And it is preferable to set the arrangement
  • this invention inserts the end surface of a plate-shaped 1st metal member in the said ditch
  • a temporary bonding step for performing spot temporary bonding along the inner corner and a rotating tool for main bonding to be rotated are inserted from the surface side of the second metal member and the third metal member, and the rotating tool for main bonding is performed. Only the stirring pin of the second metal member and the third metal member, The first butting portion and the second butting portion are friction stir welded by relatively moving the main welding rotary tool in contact with the first metal member, the second metal member and the third metal member. And a main joining step.
  • the metal members are temporarily spot-joined in the provisional joining step, the metal members can be separated from each other and misalignment can be prevented during the main joining step. Thereby, joining accuracy can be raised. Moreover, since only the stirring pin is inserted into each metal member in both the main joining step and the temporary joining step, the amount of heat input can be reduced, and the thermal strain of each metal member can be reduced. Moreover, since only the stirring pin is inserted into each metal member in both the main joining step and the temporary joining step, the load on the friction stirrer can be reduced.
  • the rotary tool for temporary joining and the rotary tool for main joining are the same. According to this joining method, it is not necessary to replace the rotary tool during the temporary joining step and the main joining step, so that the working efficiency can be improved.
  • this invention inserts the end surface of a plate-shaped 1st metal member in the said ditch
  • the present invention provides a plate-like end surface of the second metal member that has a notched corner on the back surface and a plate-shaped end surface of the third metal member that has a notched corner on the back surface.
  • the rotating tool for main joining to be rotated is inserted from the surface side of the second metal member and the third metal member, and only the stirring pin of the rotating tool for main joining is inserted into the second metal member and the third metal member.
  • first metal member, the second metal member and the third Said rotary tool for the joint in a state in contact with the genus members are relatively moved, characterized in that it comprises, a main bonding step of friction stir welding said first abutting portion and the second abutting section.
  • the metal members are temporarily spot-joined in the provisional joining step, the metal members can be separated from each other and misalignment can be prevented during the main joining step. Thereby, joining accuracy can be raised.
  • spot temporary bonding is performed in the temporary bonding process, and only the stirring pin is inserted into each metal member in the main bonding process. Therefore, the amount of heat input can be reduced, and the thermal strain of each metal member can be decreased.
  • the load concerning a friction stirring apparatus can be made small.
  • the welding is preferably TIG welding, MIG welding or laser welding.
  • first metal member 1 and the second metal member 2 are butted in a T shape in front view and joined by friction stirring.
  • a butt process, an arrangement process, a friction stirring process, and a removal process are performed.
  • the “front surface” in the description means a surface opposite to the “back surface”.
  • the placement step is a step of placing the auxiliary member 10 as shown in FIG.
  • the auxiliary member 10 is a plate-shaped metal member.
  • board thickness of the auxiliary member 10 is set to the thickness which does not generate
  • the auxiliary member 10 is formed of the same material as the first metal member 1 and the second metal member 2.
  • the auxiliary member 10 is arranged at a position corresponding to the first metal member 1 on the surface 2 b of the second metal member 2.
  • the surface 2b of the second metal member 2 and the back surface 10b of the auxiliary member 10 are in surface contact.
  • positioning process which concerns on this embodiment, it arrange
  • the friction stirring step is a step of inserting the rotating tool F rotating from the surface 10a side of the auxiliary member 10 and friction stir welding the butt portion J1.
  • the rotary tool F includes a connecting portion F1 and a stirring pin F2.
  • the connection part F1 is a part attached to a friction stirrer (not shown) and has a cylindrical shape.
  • the stirring pin F2 hangs down from the connecting part F1, and is coaxial with the connecting part 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 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.
  • the spiral groove clockwise as it goes from the proximal end to the distal end.
  • the metal plastically fluidized during friction stirring is guided to the tip side of the stirring pin F2 by the spiral groove.
  • the quantity of the metal which overflows outside the to-be-joined metal member (the 1st metal member 1, the 2nd metal member 2, and the auxiliary member 10) can be decreased.
  • the stirring pin F2 rotated right from the surface 10a of the auxiliary member 10 is inserted.
  • the rotating tool along the abutting portion J1 from the near side to the far side in FIG. 2 with the stirring pin F2 and the first metal member 1, the second metal member 2, and the auxiliary member 10 in contact with each other.
  • friction stirring is performed with the base end side of the stirring pin F2 exposed.
  • the rotation center axis C of the rotary tool F is set to a position passing through the center of the first metal member 1 in the plate thickness direction.
  • a plasticizing region W1 is formed on the movement locus of the rotary tool F.
  • the insertion depth of the stirring pin F ⁇ b> 2 may be set as appropriate, but in the present embodiment, the stirring pin F ⁇ b> 2 is set so as to contact the first metal member 1.
  • the stirring pin F2 may be brought into contact with the second metal member 2 and the auxiliary member 10 to perform friction stir welding.
  • the butt portion J1 is plastically fluidized and joined by frictional heat between the second metal member 2 and the stirring pin F2.
  • a burr V is formed on the surface 10 a of the auxiliary member 10.
  • the removal step is a step of removing the auxiliary member 10 from the second metal member 2 as shown in FIG.
  • the both ends of the auxiliary member 10 are turned up, and the auxiliary member 10 is cut off so as to be bent at the groove D.
  • the concave groove D is a portion that is deeply buried in the plasticized region W1.
  • a cutting tool or the like may be used, but in this embodiment, the removal process is performed manually.
  • the stirring pin F2 is brought into contact with the first metal member 1, the second metal member 2, and the auxiliary member 10, or the second metal member 2 and the auxiliary member 10. Since the friction stir welding is performed in the above state, the load on the friction stirrer can be reduced as compared with the prior art. Thereby, even if the plate
  • the width of the plasticizing region W1 can be reduced.
  • board thickness of the 1st metal member 1 can also be made small, the freedom degree of design of the 1st metal member 1 can be raised.
  • the auxiliary member 10 is also friction stir welded, and as shown in FIG. 4, the metal shortage of a junction part (plasticization area
  • the removing step since the burr V can be removed together with the auxiliary member 10, the surface 2b of the second metal member 2 can be finished finely without performing a separate burr removing operation. Moreover, in the friction stirring process of this embodiment, since the rotation tool F is inserted from the center part of the surface 10a of the auxiliary member 10, the insertion operation of the rotation tool F can be performed easily.
  • the joining method according to the second embodiment of the present invention will be described.
  • a butting process, an arranging process, a friction stirring process, and a removing process are performed.
  • the joining method according to the second embodiment is different from the first embodiment in the arrangement position of the auxiliary member 10.
  • the joining method according to the second embodiment will be described with a focus on the differences from the first embodiment.
  • the end surface 1 a of the first metal member 1 and the back surface 2 c of the second metal member 2 are butted together to form a butting portion J1 as in the first embodiment.
  • joining reference line X is a position where the plastic fluid material does not flow out from the inner corners of the side surfaces 1b, 1c of the first metal member 1 and the back surface 2c of the second metal member 2 in the friction stirring step described later. What is necessary is just to set suitably.
  • the friction stirring step inserts the rotation center axis C of the rotating tool F rotated to the right in a position overlapping the joining reference line X, and rotates the rotating tool F from the near side to the far side in FIG. Is a step of friction stir welding the butt portion J1.
  • the friction stirring step as in the first embodiment, only the stirring pin F2 of the rotary tool F is brought into contact with the first metal member 1, the second metal member 2, and the auxiliary member 10, or the second metal member 2 and Friction stir welding is performed with the auxiliary member 10 in contact.
  • the auxiliary member 10 of the second metal member 2 is not disposed on the 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).
  • the moving direction and rotating direction of the rotary tool F are set so as to be on the side.
  • 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.
  • the shear side is more plastic fluid than the flow side (retreatingreside: the side where the moving speed of the rotary tool is subtracted from the tangential speed on the outer periphery of the rotary tool). Since the temperature tends to rise, many burrs V tend to be generated on the shear side outside the plasticized region W1.
  • the rotational speed of the rotary tool F is fast, the temperature of the plastic fluidized material increases on the shear side, but a larger amount of burr V is generated on the flow side outside the plasticizing region W1 because the rotational speed is faster. There is a tendency.
  • the side where the burr V is generated in the traveling direction of the rotary tool F depends on the joining conditions.
  • the joining conditions include the rotational speed, rotational direction, moving speed (feeding speed) of the rotary tool F, the inclination angle (taper angle) of the stirring pin F2, and the metal members to be joined (first metal member 1, second metal member 2). And the material of the auxiliary member 10), the thickness of the metal member to be joined, etc., and the combination of these elements. It is preferable to set the side where the burrs V are generated or the side where a large amount of burrs V is generated to be the auxiliary member 10 side according to the joining conditions because the removal step described later can be easily performed.
  • the removal step is a step of removing the auxiliary member 10 from the second metal member 2.
  • the auxiliary member 10 is removed by being bent as in the first embodiment.
  • the joining method according to the second embodiment described above substantially the same effect as that of the first embodiment can be obtained.
  • the auxiliary member 10 is arranged on one side with respect to the joining reference line X, and in the friction stirring process, the joining conditions are set so that burrs V are generated on the auxiliary member 10 side.
  • flash V can be concentrated on the auxiliary member 10 arrange
  • flash V can be removed easily.
  • the butted portion J1 is formed by butting the end surface 1a of the first metal member 1 and the back surface 2c of the second metal member 2 as in the first embodiment.
  • the joining reference line X is set at a position overlapping the center of the first metal member 1 in the plate thickness direction.
  • the auxiliary member 10 is arranged on the surface 2b of the second metal member 2 on the other side with respect to the joining reference line X, while the side surface 10c of the auxiliary member 10 is slightly on one side with respect to the joining reference line X.
  • the auxiliary member 10 is disposed so as to protrude.
  • the thickness of the auxiliary member 10 and the distance from the joining reference line X to the side surface 10c are such that a metal shortage does not occur in the joining portion (plasticization region W1) in the friction stirring process described later, and one side after the friction stirring process.
  • the auxiliary member 10 is appropriately set so as not to remain.
  • the rotation center axis C of the rotating tool F rotated counterclockwise is inserted at a position overlapping the joining reference line X, and the rotating tool F is moved from the near side to the far side in FIG. 9.
  • the friction stirring step as in the first embodiment, only the stirring pin F2 of the rotary tool F is brought into contact with the first metal member 1, the second metal member 2, and the auxiliary member 10, or the second metal member 2 and Friction stir welding is performed with the auxiliary member 10 in contact.
  • burrs V tend to be formed on the flow side of the auxiliary member 10.
  • the auxiliary member 10 is removed from the second metal member 2.
  • the auxiliary member 10 is bent and the auxiliary member 10 is removed from the second metal member 2.
  • the auxiliary member 10 is arranged on the other side with respect to the joining reference line X, and the side surface 10c of the auxiliary member 10 is slightly protruded on the one side. Further, in the friction stirring step, the auxiliary member 10 and the burr V do not remain on one side of the surface 2b of the second metal member 2 while the butt joint J1 is friction stir welded, and the burr V is generated on the auxiliary member 10 side.
  • the joining conditions are set as follows.
  • a joining method according to a fourth embodiment of the present invention will be described in detail with reference to the drawings.
  • the first metal member 1 and the second metal member 2 are butted in a T shape and joined.
  • the joining method according to the present embodiment performs a butt process, a temporary joining process, and a main joining process.
  • the first metal member 1 is a plate-like metal member.
  • the material of the first metal member 1 is appropriately selected from metals capable of friction stir such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, magnesium alloy and the like.
  • the second metal member 2 is a plate-like metal member.
  • the material of the second metal member 2 may be appropriately selected from the metals that can be frictionally stirred, but is preferably the same material as that of the first metal member 1.
  • the plate thicknesses of the first metal member 1 and the second metal member 2 may be set as appropriate.
  • the butting step is a step of butting the end surface 1a of the first metal member 1 and the back surface 2c of the second metal member 2 in a T-shaped cross section.
  • the butt portion J1 is formed by the butt process.
  • the temporary joining step is a step of spot-joining the inner corners of the first metal member 1 and the second metal member 2 using a rotary tool (temporary joining rotary tool) F as shown in FIG.
  • the first inner corner (inner corner) constituted by the side surface 1b of the first metal member 1 and the back surface 2c of the second metal member 2, and the side surface 1c of the first metal member 1 and the second metal member 2 are used. Is inserted into the second inner corner (inner corner) composed of the back surface 2c of the rotating tool F while inclining the rotation center axis thereof.
  • the friction stir welding is intermittently performed along the abutting portion J1 while the stirring pin F2 is inserted shallowly into the inner corner.
  • the plasticized region W0 is intermittently formed by the temporary joining process.
  • a tab material temporary joining step is performed in which the tab material T is temporarily joined to the end surface on the one end side of the second metal member 2.
  • the thickness of the tab material T is the same as the thickness of the second metal member 2.
  • the back surface Tb of the tab material T and the back surface 2c of the second metal member 2 are flush with each other, and the surface Ta and the surface 2b of the second metal member 2 are flush with each other.
  • the tab material temporary joining step the tab material T and the second metal member 2 are temporarily joined using the rotary tool F.
  • the friction stir welding is performed in a state where the connecting portion F1 is separated from the second metal member 2, that is, the base end side of the stirring pin F2 is exposed.
  • the stirring pin F2 is arranged so that the tip of the stirring pin F2 reaches the first metal member 1, that is, the stirring pin F2, the first metal member 1, and the second metal member 2 are in contact with each other. Set the insertion depth.
  • the insertion depth of the stirring pin F2 may be set so that the stirring pin F2 contacts only the second metal member 2.
  • the butt portion J1 is plastically fluidized and joined by frictional heat between the stirring pin F2 and the second metal member 2.
  • a burr removing process for removing burrs formed in the plasticized region W2 may be performed. Thereby, the surface 2b of the 2nd metal member 2 can be finished finely.
  • the first metal member 1 and the second metal member 2 are spot-temporarily bonded to each other in the temporary bonding step. And misalignment can be prevented. Thereby, joining accuracy can be raised. Moreover, since only the stirring pin F2 is inserted into each metal member in both the main joining step and the temporary joining step, the amount of heat input can be reduced, and the thermal strain of each metal member can be reduced. In particular, in the temporary bonding step, by performing spot temporary bonding, the amount of heat input can be reduced and the bonding time can also be shortened.
  • the load applied to the friction stirrer can be reduced.
  • the butted portion J1 located at a deep position can be joined. That is, since it can join even when the plate
  • the temporary bonding rotary tool used in the temporary bonding process and the main bonding rotating tool used in the main bonding process may be different from each other, but by using the rotary tool F as in the present embodiment, There is no need to change the rotating tool in each process. Thereby, joining work can be performed efficiently.
  • a joining method according to another embodiment of the present invention will be described.
  • a butt process, a temporary bonding process, and a main bonding process are performed. Since the butting process and the main bonding process according to other embodiments are common to the above-described embodiments, the description thereof is omitted.
  • the metal members are joined so as to have a T-shaped cross section, but may be joined so as to have a substantially L-shaped cross section.
  • a joining method according to a fifth embodiment of the present invention will be described in detail with reference to the drawings.
  • the first metal member 101 and the second metal member 102 are butted in a T shape and joined.
  • the joining method according to the present embodiment performs a butting step, an auxiliary member arranging step, an inner corner friction stirring step, an auxiliary member removing step, and a butting portion friction stirring step.
  • the first metal member 101 is a plate-like metal member.
  • the material of the first metal member 101 is appropriately selected from metals capable of friction stir such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium alloy, magnesium alloy and the like.
  • a concave groove 103 having a rectangular cross section including a bottom surface 103a and side walls 103b and 103b is formed.
  • the concave groove 103 is extended in the extending direction of the first metal member 101.
  • the second metal member 102 is a plate-like metal member.
  • the plate thickness dimension of the second metal member 102 is set to be equal to or smaller than the width of the concave groove 103 so that the second metal member 102 fits into the concave groove 103.
  • the material of the second metal member 102 may be appropriately selected from the metals that can be frictionally stirred, but is preferably the same material as the first metal member 101.
  • the butting process is a process in which the first metal member 101 and the second metal member 102 are butted in a T shape when viewed from the front.
  • the second metal member 102 is fitted into the concave groove 103 of the first metal member 101, and the end surface 102 c of the second metal member 102 is butted against the bottom surface 103 a of the concave groove 103.
  • the butted portion J11 (see FIG. 16) is formed by butting the bottom surface 103a of the concave groove 103 of the first metal member 101 and the end surface 102c of the second metal member 102. Further, on both sides of the second metal member 102, a first inner corner S11 (see FIG.
  • the first inner corner S ⁇ b> 11 is a corner formed by the back surface 101 a of the first metal member 101 and the side surface 102 a of the second metal member 102.
  • the second inner corner S ⁇ b> 12 is a corner composed of the back surface 101 a of the first metal member 101 and the side surface 102 b of the second metal member 102.
  • the auxiliary member arranging step is a step of arranging auxiliary members 111 and 112 at the first inner corner S11 and the second inner corner S12 formed by the first metal member 101 and the second metal member 102. is there.
  • the auxiliary members 111 and 112 are plate-like metal members.
  • the auxiliary members 111 and 112 are made of the same material as the first metal member 101 and the second metal member 102.
  • the back surface 101a of the first metal member 101 and the front surface 111b of the auxiliary member 111 are brought into surface contact, and the end 111c is brought into contact with the side surface 102a of the second metal member 102.
  • the back surface 101 a of the first metal member 101 and the front surface 112 b of the auxiliary member 112 are brought into surface contact, and the end portion 112 c is brought into contact with the side surface 102 b of the second metal member 102.
  • the shapes of the end portions 111c and 112c of the auxiliary members 111 and 112 are formed so as to abut on the side surfaces 102a and 102b without a gap depending on the abutting angle (inner angle) between the first metal member 101 and the second metal member 102. It is good to be done.
  • the auxiliary members 111 and 112 are formed with a length that covers the extending direction of the butted portion J11.
  • the plate thickness of the auxiliary members 111 and 112 is set to such a thickness that metal shortage does not occur in the inner corner friction stirring process described later.
  • the inner corner friction stirring step is a step of friction stir welding the first inner corner S11 and the second inner corner S12 formed by the first metal member 101 and the second metal member 102 as shown in FIG. 17 shows only the friction stir welding on the first inner corner S11 side).
  • a rotating tool F is inserted into a portion where the side surface 102a of the second metal member 102 and the end portion 111c of the auxiliary member 111 abut.
  • the rotating tool F that rotates is inserted into a portion where the side surface 102b of the second metal member 102 and the end 112c of the auxiliary member 112 abut.
  • Rotating tool F is rotated clockwise in this embodiment, so that the spiral groove is formed counterclockwise from the proximal end toward the distal end.
  • the stirring pin F2 that is rotated clockwise to the portion where the side surface 102a of the second metal member 102 and the end 111c of the auxiliary member 111 abut is shallow.
  • the rotary tool F is relatively moved along the first inner corner S11 from the near side to the far side in FIG. That is, in the friction stir welding on the first inner corner S11 side, only the stirring pin F2 contacts the first metal member 101, the second metal member 102, and the auxiliary member 111 with the proximal end side of the stirring pin F2 exposed. And friction stir. Thereby, a linear plasticized region W11 is formed in the movement locus of the rotary tool F.
  • the stirring pin F2 rotated clockwise is shallowly inserted into the portion where the side surface 102b of the second metal member 102 and the end 112c of the auxiliary member 112 abut, and FIG.
  • the rotary tool F is relatively moved along the second inner corner S12 from the back side to the near side. That is, in the friction stir welding on the second inner corner S12 side, only the stirring pin F2 contacts the first metal member 101, the second metal member 102, and the auxiliary member 112 with the proximal end side of the stirring pin F2 exposed. And friction stir. Thereby, a linear plasticized region W12 (see FIG. 19) is formed in the movement locus of the rotary tool F.
  • the rotation center axis of the rotary tool F is inclined by 45 ° with respect to the vertical plane (side surfaces 102a and 102b of the second metal member 102) (see FIG. 18).
  • the joining conditions it is preferable to set the joining conditions so that burrs are generated on the auxiliary members 111 and 112 side.
  • the rotational speed of the rotary tool F is set high, in the friction stir welding on the first inner corner S11 side, many burrs V11 are generated in the auxiliary member 111 on the flow side outside the plasticizing region W11. (See FIG. 18).
  • the auxiliary member 112 on the flow side outside the plasticizing region W12 is also used in the friction stir welding on the second inner corner S12 side. Many burrs V12 tend to occur.
  • the joining conditions of the rotary tool F and the arrangement positions of the auxiliary members 111 and 112 are not limited to those described here, and may be set as appropriate.
  • the auxiliary member removing step is a step of removing the auxiliary members 111 and 112 from the first metal member 101 or the second metal member 102 (here, the auxiliary member 111 from the first metal member 101). , 112 will be described).
  • the end 111d of the auxiliary member 111 and the end 112d of the auxiliary member 112 are turned up in the direction of the thick arrow in FIG. 19 so that the boundary between the plasticized regions W11 and W12 is bent. Resect.
  • a cutting tool or the like may be used, but in this embodiment, the removal process is performed manually.
  • the burrs V11 and V12 are formed on the auxiliary members 111 and 112, the burrs V11 and V12 are also removed together with the auxiliary members 111 and 112 (see FIG. 20). Therefore, the burrs V11 and V12 can be easily removed together with the auxiliary members 111 and 112.
  • the abutting portion friction stirring step is a step of performing friction stir welding to the butting portion J11 as shown in FIGS.
  • the first metal member 101 and the second metal member 102 are arranged on the gantry 105, 105. More specifically, in the abutting portion friction stirring step, the second metal member 102 is inserted between the bases 105 and 105 that are spaced apart, and the back surface 101 a of the first metal member 101 is brought into contact with the bases 105 and 105.
  • the mounts 105 and 105 both present a rectangular parallelepiped.
  • Chamfered portions 105a and 105a are formed in portions of the gantry 105 and 105 facing the first inner corner S11 and the second inner corner S12.
  • the shape of the chamfered portion 105a may be appropriately formed so as not to contact the plasticized regions W11 and W12. In the present embodiment, the shape is a C chamfered shape.
  • the friction stir welding is performed by tracing the butt portion J11 with the base end portion of the stirring pin F2 exposed.
  • a plasticized region W13 is formed in the movement path of the rotary tool F by hardening of the friction-stirred metal.
  • the insertion depth of the rotary tool F is preferably set so that the tip of the stirring pin F2 reaches the abutting portion J11. That is, it is preferable to perform friction stir welding by bringing the rotary tool F into contact with the first metal member 101 and the second metal member 102.
  • the tip of the stirring pin F2 is set so as not to reach the abutting portion J11, that is, when the stirring pin F2 is brought into contact only with the first metal member 101, the frictional heat between the first metal member 101 and the stirring pin F2 As a result, the metal around the butt portion J11 is plastically fluidized so that the first metal member 101 and the second metal member 102 are joined.
  • the friction stirring process When the friction stirring process is completed, it is preferable to perform a burr removing process for removing burrs generated on the surface 101b of the first metal member 101. Thereby, as shown in FIG. 24, the surface 101b of the 1st metal member 101 can be finished finely.
  • the auxiliary members 111 and 112 are arranged (sideways) so as to be laid on the first metal member 101 side of the first inner corner S11 and the second inner corner S12. However, at least one of the auxiliary members 111 and 112 may be disposed (vertically placed) so as to stand against the second metal member 102 side. For example, as shown in FIG. 25, the side surface 102b of the second metal member 102 and the back surface 112a of the auxiliary member 112 are brought into surface contact, and the end 112c is brought into contact with the back surface 101a of the first metal member 101.
  • a tab material (not shown) is placed in close contact with the near side or the back side of the first metal member 101 and the second metal member 102, and the rotary tool F is placed on the tab material.
  • the first inner corner S11 and the second inner corner S12 may be friction stir welded by moving relative to the first metal member 101 and the second metal member 102 in the inserted state.
  • a tab material (not shown) is placed in close contact with the near side or the back side of the first metal member 101 and the second metal member 102, and the rotary tool F is placed on the tab material. May be once inserted and then relatively moved toward the first metal member 101 and the second metal member 102 in the inserted state, and the butt joint J11 may be friction stir welded. The same applies when the rotary tool F is detached.
  • the auxiliary members 111 and 112 are disposed at the first inner corner S11 and the second inner corner S12, and the first inner corner S11 and the second inner corner S11 are interposed via the auxiliary members 111 and 112. Friction stir welding of the two inner corners S12 is performed. Thereby, since the metal shortage of the first inner corner S11 and the second inner corner S12 can be eliminated by the auxiliary members 111 and 112, it is possible to prevent poor bonding.
  • the joining method according to the present embodiment since the friction stir welding is performed on the first inner corner S11 and the second inner corner S12, the first metal member 101 and the second metal at the time of the abutting portion friction stirring step. Positional displacement and separation between the members 102 can be prevented. Thereby, generation
  • the thickness of the portion of the first metal member 101 where the concave groove 103 is formed is greater than the thickness of the other portions. Is also thin. Therefore, in the butt portion friction agitation process of the present embodiment, the depth at which the agitation pin F2 is inserted can be reduced as compared with the case where the concave groove 103 is not formed, so that a large load is not applied to the friction agitation device. Friction stir welding of the butt portion J11 can be performed.
  • the burrs V11 and V12 can be collected on the auxiliary members 111 and 112. . Therefore, the burrs V11 and V12 can be easily removed together with the auxiliary members 111 and 112.
  • the rotary tool F is particularly advantageous when the thickness of the first metal member 101 is large. Moreover, since the rotation tool F can make the width
  • the pedestals 105 and 105 of the present embodiment have chamfered portions 105a and 105a formed at portions facing the first inner corner S11 and the second inner corner S12.
  • the plasticized regions W11 and W12 and the gantry 105 interfere with each other, and the first metal member 101 and the second metal member 102 are lifted from the gantry 105.
  • the joining method according to the sixth embodiment of the present invention performs a butting step, an auxiliary member arranging step, an inner corner friction stirring step, an auxiliary member removing step, and a butt portion friction stirring step.
  • the joining method according to the second embodiment is different from the fifth embodiment in that a rotating tool G is used in the butt portion friction stirring step.
  • the other steps, the butting step, the auxiliary member arranging step, the inner corner friction stirring step, and the auxiliary member removing step, are the same as those in the fifth embodiment, and thus the description thereof is omitted.
  • the rotary tool G is made of, for example, tool steel, and includes a columnar shoulder portion G1 and a stirring pin G2 depending from the shoulder portion G1. A spiral groove is formed on the outer peripheral surface of the stirring pin G2.
  • the rotary tool G is moved along the butt portion J11 while being inserted into the surface 101b of the first metal member 101.
  • the abutting portion friction stirring step the lower end surface of the shoulder portion G1 is pushed into the first metal member 101 by about several millimeters to perform friction stirring.
  • the insertion depth of the stirring pin G2 is not particularly limited as long as the butted portion J11 can be friction stir welded, but it is preferable to set the tip of the stirring pin G2 so as to reach the butted portion J11 as shown in FIG. . That is, it is preferable to perform friction stir welding by bringing the rotary tool G into contact with the first metal member 101 and the second metal member 102.
  • the tip of the stirring pin G2 When the tip of the stirring pin G2 is set so as not to reach the butting portion J11, that is, when the stirring pin G2 contacts only the first metal member 101, the frictional heat between the first metal member 101 and the stirring pin G2 As a result, the metal around the butt portion J11 is plastically fluidized so that the first metal member 101 and the second metal member 102 are joined.
  • the outer diameter (diameter) of the shoulder part G1 may be set suitably, it is good to form smaller than the width
  • the material plastically fluidized by the stirring pin G2 of the rotary tool G is the first metal member 101 and the second metal member 102. Can be prevented from jumping out from the first inner corner S11 and the second inner corner S12.
  • the joining method according to the seventh embodiment of the present invention performs a butting step, an auxiliary member arranging step, an inner corner friction stirring step, an auxiliary member removing step, and a butt portion friction stirring step.
  • the fifth embodiment is that the first metal member 121, the second metal member 122, and the third metal member 123 are joined in a T-shape when viewed from the front. Is different.
  • the first metal member 121 and the third metal member 123 are plate-like metal members.
  • the material of the first metal member 121 and the third metal member 123 is appropriately selected from metals that can be frictionally stirred such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium alloy, and magnesium alloy.
  • a corner on the back surface 121a side of the first metal member 121 is cut out in a rectangular shape in front view. That is, the back surface 121a of the first metal member 121 has a recess 121f composed of a bottom surface 121d and a side wall 121e.
  • angular part by the side of the back surface 123a of the 3rd metal member 123 is notched by the front view rectangular shape.
  • the back surface 123a of the third metal member 123 has a recess 123f composed of a bottom surface 123d and a side wall 123e.
  • a concave groove 124 is formed by the concave portion 121f and the concave portion 123f by butting the first metal member 121 and the third metal member 123 together.
  • the recessed part 121f and the recessed part 123f are equivalent dimensions. That is, it is preferable that the bottom surface 121d of the first metal member 121 and the bottom surface 123d of the third metal member 123 are flush with each other in a state where the first metal member 121 and the third metal member 123 are abutted.
  • the second metal member 122 is a plate-like metal member.
  • the plate thickness dimension of the second metal member 122 is set to be equal to or smaller than the width of the groove 124 so that the second metal member 122 fits into the groove 124.
  • the material of the second metal member 122 may be appropriately selected from the metals that can be frictionally stirred, but is preferably the same material as the first metal member 121 and the third metal member 123.
  • the first butted portion J21 is formed by butting the end surface 121c on the side where the recess 121f of the first metal member 121 is formed and the end surface 123c on the side where the recess 123f of the third metal member 123 is formed.
  • the back surfaces 121a and 123a (around the first abutting portion J21) of the first metal member 121 and the third metal member 123 are recessed grooves having a rectangular cross section.
  • 124 is formed.
  • the concave groove 124 extends in the extending direction of the first metal member 121 and the third metal member 123.
  • the end face 122c of the second metal member 122 is butted against the first butting part J21 to form the second butting part J22 (see FIG. 28). That is, the end surface 122c of the second metal member 122 is abutted against the groove 124 formed in the back surface 121a of the first metal member 121 and the back surface 123a of the third metal member 123. Thereby, the first inner corner S21 (see FIG. 28) and the second inner corner S22 (see FIG. 28) are formed on both sides of the second metal member 122.
  • the first inner corner S ⁇ b> 21 is a corner constituted by the back surface 121 a of the first metal member 121 and the side surface 122 a of the second metal member 122.
  • the second inner corner S ⁇ b> 22 is a corner formed by the back surface 123 a of the third metal member 123 and the side surface 122 b of the second metal member 122.
  • the first inner corner S21 of the first metal member 121 and the second metal member 122 and the second inner corner S22 of the third metal member 123 and the second metal member 122 are assisted.
  • the members 111 and 112 are disposed.
  • the auxiliary members 111 and 112 are plate-like metal members.
  • the auxiliary members 111 and 112 are formed of the same material as the first metal member 121, the second metal member 122, and the third metal member 123.
  • the back surface 121a of the first metal member 121 and the front surface 111b of the auxiliary member 111 are brought into surface contact, and the end 111c is brought into contact with the side surface 122a of the second metal member 122.
  • the side surface 122 b of the second metal member 122 and the back surface 112 a of the auxiliary member 12 are brought into surface contact, and the end portion 112 c is brought into contact with the back surface 123 a of the third metal member 123.
  • the shapes of the end portions 111c and 112c of the auxiliary members 111 and 112 are such that the side surface 122a and the back surface 123a are in accordance with the abutment angle (inner angle) of the first metal member 121, the second metal member 122, and the third metal member 123. It is good to form so that it may contact
  • the auxiliary members 111 and 112 are formed with a length that covers the extending direction of the second butting portion J22.
  • the plate thickness of the auxiliary members 111 and 112 is set to such a thickness that metal shortage does not occur in the inner corner friction stirring process described later.
  • the auxiliary member 112 may be disposed (sideways) so as to lie on the third metal member 123 side of the second inner corner S22, or the first inner corner S21. You may arrange
  • the stirring pin F2 that is rotated clockwise to the portion where the side surface 122a of the second metal member 122 abuts the end 111c of the auxiliary member 111 is shallow.
  • the rotary tool F is inserted and relatively moved along the first inner corner S21 from the near side to the far side in FIG. That is, in the friction stir welding on the first inner corner S21 side, only the stirring pin F2 contacts the first metal member 121, the second metal member 122, and the auxiliary member 111 with the proximal end side of the stirring pin F2 exposed. And friction stir. Thereby, a linear plasticized region W21 is formed in the movement locus of the rotary tool F.
  • the agitating pin F2 rotated clockwise is shallowly inserted into the portion where the back surface 123a of the third metal member 123 and the end 112c of the auxiliary member 112 abut, and FIG.
  • the rotary tool F is relatively moved along the second inner corner S22 from the near side to the far side. That is, in the friction stir welding on the second inner corner S22 side, only the stirring pin F2 contacts the second metal member 122, the third metal member 123, and the auxiliary member 112 with the proximal end side of the stirring pin F2 exposed. And friction stir. As a result, a linear plasticized region W22 (see FIG. 31) is formed on the movement locus of the rotary tool F.
  • the rotation center axis of the rotary tool F is inclined by 45 ° with respect to the vertical plane (side surfaces 122a and 122b of the second metal member 122) (see FIG. 30).
  • the joining conditions it is preferable to set the joining conditions so that burrs are generated on the auxiliary members 111 and 112 side.
  • the joining condition is set so that the side where the burrs V21, V22 are generated or the side where the burrs V21, V22 are generated is the auxiliary members 111, 112 side, as shown in FIG. , 112 can be combined with burrs V21, V22. 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. Thereby, a joining cycle can be shortened.
  • the auxiliary member removing step is a step of removing the auxiliary members 111 and 112 from the first metal member 121, the second metal member 122, or the third metal member 123, as shown in FIG.
  • the case where the auxiliary member 111 is removed from the member 121 and the auxiliary member 112 is removed from the second metal member 122 will be described).
  • the end 111d of the auxiliary member 111 and the end 112d of the auxiliary member 112 are turned up in the direction of the thick arrow in FIG. 31 so that the boundary between the plasticized regions W21 and W22 is bent. Resect.
  • a cutting tool or the like may be used, but in this embodiment, the removal process is performed manually.
  • the burrs V21 and V22 are formed on the auxiliary members 111 and 112, the burrs V21 and V22 are also removed together with the auxiliary members 111 and 112 (see FIG. 32). Therefore, the burrs V21 and V22 can be easily removed together with the auxiliary members 111 and 112.
  • the abutting portion friction stirring step is a step of performing friction stir welding on the first butting portion J21 and the second butting portion J22 as shown in FIGS.
  • first, the first metal member 121, the second metal member 122, and the third metal member 123 are arranged on the gantry 105, 105 in the same manner as the fifth embodiment. More specifically, in the abutting portion friction stirring step, the second metal member 122 is inserted between the gantry 105 and 105 that are spaced apart from each other, and the back surface 121a of the first metal member 121 and the third metal member 122 are inserted into the gantry 105 and 105. The back surface 123a of the metal member 123 is brought into contact.
  • the mounts 105 and 105 both present a rectangular parallelepiped.
  • Chamfered portions 105a and 105a are formed in portions of the gantry 105 and 105 facing the first inner corner S21 and the second inner corner S22.
  • the shape of the chamfered portion 105a may be appropriately formed so as not to contact the plasticized regions W21 and W22. In the present embodiment, the shape is a C chamfered shape.
  • the abutting portion friction agitation step inserts the rotating tool F from the surface 121b of the first metal member 121 and the surface 123b of the third metal member 123, and follows the first abutting portion J21.
  • This is a step of friction stir welding.
  • the rotary tool F may be the same as that used in the inner corner friction stirring process, and is formed of, for example, tool steel, and includes a connecting portion F1 and a stirring pin F2.
  • the stirring pin F2 is tapered, and the length of the stirring pin F2 is the portion where the concave groove 124 (see FIG. 27) formed by the first metal member 121 and the third metal member 123 is formed. It is larger than the plate thickness.
  • the butt portion friction stirring step only the rotated stirring pin F2 is inserted into the first butt portion J21 formed by the first metal member 121 and the third metal member 123, and the first metal member 121 and the third metal member 123 It is moved while being separated from the connecting portion F1.
  • the friction stir welding is performed by tracing the first abutting portion J21 with the base end portion of the stirring pin F2 exposed.
  • a plasticized region W23 is formed in the movement locus of the rotary tool F by hardening of the friction-stirred metal.
  • the insertion depth of the rotary tool F is preferably set so that the tip of the stirring pin F2 reaches the second butting portion J22. That is, it is preferable to perform friction stir welding by bringing the rotary tool F into contact with the first metal member 121, the second metal member 122, and the third metal member 123.
  • the first metal member 121 is used.
  • the metal around the second butted portion J22 is plastically fluidized by frictional heat between the third metal member 123 and the stirring pin F2, and the first metal member 121, the second metal member 122, and the third metal member 123 are joined.
  • a burr removing step of removing burrs generated on the surfaces 121b and 123b of the first metal member 121 and the third metal member 123.
  • a tab material (not shown) is arranged in close contact with the front side or the back side of the first metal member 121, the second metal member 122, and the third metal member 123.
  • the first inner corner S21 and the second inner corner are moved relative to the first metal member 121, the second metal member 122, and the third metal member 123 while being inserted.
  • S22 may be friction stir welded.
  • a tab material (not shown) is placed in close contact with the front side or the back side of the first metal member 121, the second metal member 122, and the third metal member 123, Once the rotary tool F is inserted into the tab material, it is moved relative to the first metal member 121, the second metal member 122, and the third metal member 123 in the inserted state, and the first butted portion J21 and the second butted portion. Part J22 may be friction stir welded. The same applies when the rotary tool F is detached.
  • the butt portion friction stirring step the lower end surface of the shoulder portion G1 is pushed into the first metal member 121 and the third metal member 123 by several millimeters to perform friction stirring.
  • the insertion depth of the stirring pin G2 is not particularly limited as long as the first butting portion J21 and the second butting portion J22 can be friction stir welded, but is set so that the tip of the stirring pin G2 reaches the second butting portion J22. It is preferable. That is, it is preferable to perform friction stir welding by bringing the rotary tool G into contact with the first metal member 121, the second metal member 122, and the third metal member 123.
  • the auxiliary members 111 and 112 are arranged in the first inner corner S21 and the second inner corner S22, and the first inner corner S21, Friction stir welding of the second inner corner S22 is performed. Thereby, since the metal shortage of the first inner corner S21 and the second inner corner S22 can be solved by the auxiliary members 111 and 112, it is possible to prevent poor bonding.
  • the first metal member 121 and the second metal in the butt portion friction stirring step Misalignment and separation of the members 122 and the third metal member 123 and the second metal member 122 can be prevented. Thereby, it is possible to prevent the occurrence of poor bonding due to the positional deviation or separation of the first metal member 121, the second metal member 122, and the third metal member 123.
  • the first metal member 121 of the present embodiment is formed with a recess 121f that constitutes the groove 124
  • the third metal member 123 is formed with a recess 123f that constitutes the groove 124
  • the plate thickness of the portion where the recess 121f of the first metal member 121 and the recess 123f of the third metal member 123 are formed is thinner than the plate thickness of the other portions. Therefore, in the friction stir process of the present embodiment, the depth at which the stir pin F2 is inserted can be reduced as compared with the case where the concave groove 124 is not formed, so that a large load is not applied to the friction stirrer. Friction stir welding of the butt J21 and the second butt J22 can be performed.
  • the burrs V21 and V22 can be collected on the auxiliary members 111 and 112. . Therefore, the burrs V21 and V22 can be easily removed together with the auxiliary members 111 and 112.
  • the rotary tool F is particularly advantageous when the plate thickness of the first metal member 121 and the third metal member 123 is large. Moreover, since the rotation tool F can make the width
  • the pedestals 105 and 105 of the present embodiment have chamfered portions 105a and 105a formed at portions facing the first inner corner S21 and the second inner corner S22.
  • the plasticized regions W21 and W22 interfere with the gantry 105, and the first metal member 121 and the second metal member.
  • 122 and the third metal member 123 may be lifted from the gantry 105, according to the present embodiment, it is possible to prevent the plasticized regions W21 and W22 and the gantry 105 from interfering with each other.
  • the joining method according to the eighth embodiment of the present invention will be described in detail with reference to the drawings.
  • the first metal member 201 and the second metal member 202 are butted in a T shape in front view and joined by friction stirring.
  • a butt process, an arrangement process, a friction stirring process, and a removal process are performed.
  • Both the first metal member 201 and the second metal member 202 have a plate shape.
  • the first metal member 201 and the second metal member 202 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 plate thickness dimensions of the first metal member 201 and the second metal member 202 may be set as appropriate.
  • On the back surface 202c of the second metal member 202 a concave groove 202d that opens to the first metal member 201 side is formed.
  • the recessed groove 202d has a rectangular cross section corresponding to the shape of the first metal member 201.
  • the groove width of the recessed groove 202d is formed to be equal to the plate thickness of the first metal member 201 in this embodiment.
  • the recessed groove 202d is formed so that one end edge of the first metal member 201 can be fitted.
  • the end surface 201a of the first metal member 201 is inserted into the concave groove 202d of the second metal member 202, the end surface 201a is butted against the bottom surface 202e of the concave groove 202d, and the butted portion J41 is formed. It is a process of forming.
  • the groove width of the concave groove 202d is formed to be equal to the plate thickness of the first metal member 201, so that the side surfaces 201b and 201c in the plate thickness direction of the first metal member 201 and the concave groove The side surfaces 202f and 202g in the groove width direction of 202d are in contact with each other, and one end edge of the first metal member 201 is fitted into the concave groove 202d.
  • the placement step is a step of placing the auxiliary member 210 as shown in FIG.
  • the auxiliary member 210 is a plate-shaped metal member.
  • the plate thickness of the auxiliary member 210 is set to such a thickness that metal shortage does not occur in the joint portion (plasticization region W41) formed in the friction stirring step described later.
  • the auxiliary member 210 is formed of the same material as the first metal member 201 and the second metal member 202.
  • the auxiliary member 210 is arranged at a position corresponding to the first metal member 201 and the concave groove 202d on the surface 202b of the second metal member 202.
  • the front surface 202b of the second metal member 202 and the back surface 210b of the auxiliary member 210 are in surface contact.
  • the central portion of the auxiliary member 210 and the center of the first metal member 201 in the plate thickness direction are arranged at substantially overlapping positions.
  • the friction stirring step is a step of inserting the rotating tool F rotating from the surface 210a side of the auxiliary member 210 and friction-stir-joining the butt J41.
  • the spiral groove is formed in a counterclockwise direction from the proximal end toward the distal end.
  • the stirring pin F2 rotated right from the surface 210a of the auxiliary member 210 is inserted.
  • the rotating tool along the abutting portion J41 from the near side to the far side in FIG. 37 with the stirring pin F2, the first metal member 201, the second metal member 202, and the auxiliary member 210 in contact with each other.
  • friction stirring is performed with the base end side of the stirring pin F2 exposed.
  • the rotation center axis C of the rotary tool F is set to a position passing through the center of the first metal member 201 in the plate thickness direction and the center of the groove 202d in the groove width direction.
  • a plasticizing region W41 is formed in the movement locus of the rotary tool F.
  • the insertion depth of the stirring pin F ⁇ b> 2 may be set as appropriate, but in the present embodiment, the stirring pin F ⁇ b> 2 is set so as to contact the first metal member 201.
  • the stirring pin F2 may be brought into contact with the second metal member 202 and the auxiliary member 210 to perform the friction stir welding.
  • the butt portion J41 is plastically fluidized and joined by frictional heat between the second metal member 202 and the stirring pin F2.
  • a burr V41 is formed on the surface 210a of the auxiliary member 210.
  • the removal step is a step of removing the auxiliary member 210 from the second metal member 202 as shown in FIG.
  • the auxiliary member 210 is cut off while turning up both ends of the auxiliary member 210 so as to bend at the groove D.
  • the concave groove D is a portion that is deeply grooved in the plasticized region W41.
  • a cutting tool or the like may be used, but in this embodiment, the removal process is performed manually.
  • the stirring pin F2 is brought into contact with the first metal member 201, the second metal member 202 and the auxiliary member 210, or the second metal member 202 and the auxiliary member 210. Since the friction stir welding is performed in the above state, the load on the friction stirrer can be reduced as compared with the prior art. Thereby, even if the plate
  • the auxiliary member 210 is also friction stir welded to prevent metal shortage at the joint (plasticized region W41) as shown in FIG. .
  • the end surface 201a of the first metal member 201 is inserted into the concave groove 202d of the second metal member 202 and the end surface 201a is abutted against the bottom surface 202e of the concave groove 202d. A positional deviation from the metal member 202 can be prevented.
  • the removing step since the burr V41 can be removed together with the auxiliary member 210, the surface 202b of the second metal member 202 can be finished finely without performing a separate burr removing operation. Moreover, in the friction stirring process of this embodiment, since the rotation tool F is inserted from the center part of the surface 210a of the auxiliary member 210, the insertion work of the rotation tool F can be performed easily.
  • the end surface 201a of the first metal member 201 is inserted into the concave groove 202d of the second metal member 202, and the end surface 201a is used as the bottom surface 202e of the concave groove 202d.
  • Butt portion J41 is formed.
  • a planned position through which the rotation center axis C (see FIG. 41) of the rotary tool F passes is set as a “joining reference line X” during the friction stirring step.
  • the joining reference line X is set so as to overlap the center in the plate thickness direction of the first metal member 201 and the center in the groove width direction of the concave groove 202d.
  • the auxiliary member 210 is arranged on the surface 202b of the second metal member 202 only on one side with respect to the joining reference line X, and the auxiliary member 210 is placed at a position where the side surface 210c of the auxiliary member 210 overlaps the joining reference line X. 210 is arranged.
  • the joining reference line X is a position where the plastic fluid material does not flow out from the inner corners of the side surfaces 201b and 201c of the first metal member 201 and the back surface 202c of the second metal member 202 in the friction stirring step described later. What is necessary is just to set suitably.
  • the friction stirrer step inserts the rotation center axis C of the rotating tool F rotated to the right in a position overlapping the joining reference line X, and rotates the rotating tool F from the near side to the far side in FIG. Is a step of friction stir welding the butt portion J41 by relatively moving.
  • the friction stirring step as in the eighth embodiment, only the stirring pin F2 of the rotary tool F is brought into contact with the first metal member 201, the second metal member 202, and the auxiliary member 210, or the second metal member 202 and Friction stir welding is performed in a state where the auxiliary member 210 is in contact with the auxiliary member 210.
  • the auxiliary member 210 of the second metal member 202 is not arranged on the 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).
  • the moving direction and rotating direction of the rotary tool F are set so as to be on the side.
  • 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.
  • the joining conditions include the rotational speed of the rotary tool F, the rotational direction, the traveling direction, the moving speed (feeding speed), the inclination angle (taper angle) of the stirring pin F2, the metal member to be joined (the first metal member 201, the second It is determined by each element such as the material of the metal member 202 and the auxiliary member 210), the thickness of the metal member to be joined, and the combination of these elements. It is preferable to set the side where the burrs V41 are generated or the side where a large amount of burrs V41 are generated to be the auxiliary member 210 side according to the joining conditions because the removal process described later can be easily performed.
  • the removal step is a step of removing the auxiliary member 210 from the second metal member 202.
  • the auxiliary member 210 is bent and removed as in the eighth embodiment. Through the above steps, the first metal member 201 and the second metal member 202 are joined.
  • the auxiliary member 210 is arranged on one side with respect to the joining reference line X, and in the friction stirring process, the joining condition is set so that the burr V is generated on the auxiliary member 210 side.
  • flash V41 can be collected on the auxiliary member 210 arrange
  • the end surface 201a of the first metal member 201 is inserted into the concave groove 202d of the second metal member 202, and the end surface 201a is inserted into the bottom surface 202e of the concave groove 202d.
  • Butt portion J41 is formed.
  • the joining reference line X is set at a position that overlaps the center of the first metal member 201 in the plate thickness direction and the center of the groove 202d in the groove width direction.
  • the auxiliary member 210 is arranged on the surface 202b of the second metal member 202 on the other side with respect to the joining reference line X, and the side surface 210c of the auxiliary member 210 is slightly on one side with respect to the joining reference line X.
  • the auxiliary member 210 is disposed so as to protrude.
  • the thickness of the auxiliary member 210 and the distance from the joining reference line X to the side surface 210c are such that a metal shortage does not occur in the joining portion (plasticization region W41) in the friction stirring process described later, and one side after the friction stirring process.
  • the auxiliary member 210 is appropriately set so as not to remain.
  • the rotation center axis C of the rotating tool F rotated counterclockwise is inserted at a position overlapping the joining reference line X, and the rotating tool F is moved from the near side to the far side in FIG. Is a step of friction stir welding the butt portion J41 by relatively moving.
  • the friction stirring step as in the eighth embodiment, only the stirring pin F2 of the rotary tool F is brought into contact with the first metal member 201, the second metal member 202, and the auxiliary member 210, or the second metal member 202 and Friction stir welding is performed in a state where the auxiliary member 210 is in contact with the auxiliary member 210.
  • the burr V41 tends to be formed on the flow side of the auxiliary member 210.
  • the auxiliary member 210 is arranged on the other side with respect to the joining reference line X, and the side surface 210c of the auxiliary member 210 is slightly protruded on the one side.
  • the auxiliary member 210 and the burr V41 do not remain on one side of the surface 2b of the second metal member 202 and the burr V41 is generated on the auxiliary member 210 side while the butt joint J41 is friction stir welded.
  • the joining conditions are set as follows.
  • the metal shortage of the joining portion (plasticization region W41) can be prevented in a well-balanced manner, and the burrs V41 can be concentrated on the auxiliary member 210 disposed on the other side. Accordingly, since the burr V41 can be removed together with the auxiliary member 210, the burr V41 can be easily removed.
  • a joining method according to the eleventh embodiment of the present invention will be described.
  • a butt process, an arrangement process, a friction stirring process, and a removal process are performed.
  • the joining method according to the present embodiment is different from the eighth embodiment in that the concave groove 205 is formed by the second metal member 203 and the third metal member 204.
  • the joining method according to the eleventh embodiment will be described with a focus on differences from the eighth embodiment.
  • the first metal member 201, the second metal member 203, and the third metal member 204 all have a plate shape.
  • the first metal member 201, the second metal member 203, and the third metal member 204 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 plate thickness dimensions of the first metal member 201, the second metal member 203, and the third metal member 204 may be set as appropriate.
  • the second metal member 203 has an end surface 203c facing the third metal member 204, a surface 203a continuous with the end surface 203c and extending in a direction orthogonal to the end surface 203c, and extending in a direction orthogonal to the end surface 203c. It has a back surface 203b, and a first notch 203d formed by cutting out a corner formed by the back surface 203b and the end surface 203c. All the notches 203d are open to the first metal member 201 side and the third metal member 204 side.
  • the first notch 203d has a first notch bottom surface 203e and a first notch side surface 203f.
  • the first bottom surface 203e is continuous with the end surface 203c and extends in a direction orthogonal thereto.
  • the first notch side surface 203f is formed between the first notch bottom surface 203e and the back surface 203b, and extends in a direction orthogonal to the first notch bottom surface 203e and the back surface 203b.
  • the third metal member 204 includes an end surface 204c facing the end surface 203c, a surface 204a that is continuous with the end surface 204c and extends in a direction orthogonal to the end surface 204c, and a back surface 204b that extends in a direction orthogonal to the end surface 204c. And a second cutout portion 204d formed by cutting out a corner portion constituted by the back surface 204b and the end surface 204c.
  • the second notch 204d is open to the first metal member 201 side and the second metal member 203 side.
  • the second cutout portion 204d has a second cutout bottom surface 204e and a second cutout side surface 204f.
  • the second notch bottom surface 204e is continuous with the end surface 204c and extends in a direction orthogonal thereto.
  • the second notch side surface 204f is formed between the second notch bottom surface 204e and the back surface 204b, and extends in a direction orthogonal to the second notch bottom surface 204e and the back surface 204b. All the notch parts 203d and the second notch part 204d are formed symmetrically with respect to the joining reference line X (in this embodiment, an extension line of the first abutting part J42).
  • the first notch 203d and the second notch 204d constitute a single groove 205 in a state where the end face 203c and the end face 204c are abutted.
  • the first notch bottom surface 203e and the second notch bottom surface 204e constitute the bottom surface 205a of the groove 205.
  • the first notch side surface 203f constitutes one side surface 205b of the concave groove 205
  • the second notch side surface 204f constitutes the other side surface 205c of the concave groove 205.
  • the recessed groove 205 opens to the first metal member 201 side.
  • the concave groove 205 has a rectangular cross section corresponding to the shape of the first metal member 201.
  • the groove width of the concave groove 205 is formed to be equal to the plate thickness of the first metal member 201 in this embodiment.
  • the concave groove 205 is formed so that one end edge of the first metal member 201 can be fitted.
  • the end surface 203c of the second metal member 203 and the end surface 204c of the third metal member 204 are butted to form the first butting portion J42.
  • a single and rectangular recess groove 205 straddling the second metal member 203 and the third metal member 204 is formed by the first notch 203d and the second notch 204d.
  • the end surface 201a of the first metal member 201 is inserted into the concave groove 205 of the second metal member 203 and the third metal member 204, the end surface 201a is butted against the bottom surface 205a of the concave groove 205, and the second butted portion J43 ( 47).
  • the auxiliary member 210 is arranged so as to straddle the surface 203a of the second metal member 203 and the surface 204a of the third metal member 204.
  • the auxiliary member 210 is made of the same material as the first metal member 201, the second metal member 203, and the third metal member 204.
  • the auxiliary member 10 is arranged at a position corresponding to the first metal member 201 and the groove 205 on the surface 203a of the second metal member 203 and the surface 204a of the third metal member 204.
  • the central portion of the auxiliary member 210, the center of the first metal member 201 in the plate thickness direction, and the first butted portion J42 are arranged at substantially overlapping positions.
  • the friction stirring step is a step of inserting the rotating tool F rotating from the surface 210a side of the auxiliary member 210 and friction stir welding the first butting portion J42 and the second butting portion J43.
  • the stirring pin F2 rotated right from the surface 210a of the auxiliary member 210 is inserted.
  • the first pin from the near side to the far side in FIG. 47 in the state where the stirring pin F2 and the first metal member 201, the second metal member 203, the third metal member 204, and the auxiliary member 210 are in contact with each other.
  • the rotary tool F is relatively moved along the butting portion J42 and the second butting portion J43.
  • friction stirring is performed with the base end side of the stirring pin F2 exposed.
  • the rotation center axis C of the rotary tool F is set to a position passing through the center of the first metal member 201 in the plate thickness direction, the center of the groove 205 in the groove width direction, and the first abutting portion J42.
  • a plasticizing region W43 is formed in the movement locus of the rotary tool F.
  • the insertion depth of the stirring pin F ⁇ b> 2 may be set as appropriate, but in the present embodiment, the stirring pin F ⁇ b> 2 is set so as to contact the first metal member 201.
  • the stirring pin F2 may be brought into contact with the second metal member 203, the third metal member 204, and the auxiliary member 210 to perform the friction stir welding.
  • the second butted portion J43 is plastically fluidized and joined by frictional heat between the second metal member 203, the third metal member 204, and the stirring pin F2.
  • a burr V42 is formed on the surface 210a of the auxiliary member 210.
  • the removal step is a step of removing the auxiliary member 210 from the second metal member 203 and the third metal member 204 as shown in FIG.
  • the auxiliary member 210 is cut off while turning up both ends of the auxiliary member 210 so as to bend at the groove D.
  • the concave groove D is a portion that is deeply buried in the plasticized region W43.
  • a cutting tool or the like may be used, but in this embodiment, the removal process is performed manually.
  • the end surface 203c of the second metal member 203 and the end surface 204c of the third metal member 204 are butted together to form the first butting portion J42 as in the eleventh embodiment.
  • a single and rectangular recess groove 205 straddling the second metal member 203 and the third metal member 204 is formed by the first notch 203d and the second notch 204d.
  • the end surface 201a of the first metal member 201 is inserted into the recessed groove 205 of the second metal member 203 and the third metal member 204, the end surface 201a is butted against the bottom surface 205a of the recessed groove 205, and the second butted portion J43 is formed.
  • An auxiliary member 210 is disposed.
  • the auxiliary member 210 may be arranged on the surface 203a of the second metal member 203 only on the other side with respect to the first abutting portion J42.
  • the friction stirring step and the removing step according to the present embodiment are performed by a method substantially similar to that of the ninth embodiment described above.
  • the auxiliary member 210 is disposed on the surface 204a of the third metal member 204 on one side with respect to the first abutting portion J42, and the burr V42 is disposed on the auxiliary member 210 side in the friction stirring step.
  • the joining conditions were set so that this occurred.
  • flash V42 can be concentrated on the auxiliary member 210 arrange
  • flash V42 can be removed with the auxiliary member 210, the burr
  • the end face 203c of the second metal member 203 and the end face 204c of the third metal member 204 are butted together in the same manner as in the eleventh embodiment to form the first butting portion J42.
  • a single and rectangular recess groove 205 straddling the second metal member 203 and the third metal member 204 is formed by the first notch 203d and the second notch 204d.
  • the auxiliary member 210 is arranged on the surface 203a of the second metal member 203 on the other side with respect to the first butting portion J42, and the side surface 210c of the auxiliary member 210 is on one side with respect to the first butting portion J42.
  • the auxiliary member 210 is disposed so as to slightly protrude from the third metal member 204.
  • the thickness of the auxiliary member 210 and the distance from the joining reference line X to the side surface 210c are such that there is no metal shortage in the joining portion (plasticization region W41) in the friction stirring process, and assistance is performed on one side after the friction stirring process. It sets suitably so that the member 210 may not remain
  • the auxiliary member 210 is arranged on the surface 204a of the third metal member 204 on one side with respect to the first abutting portion J42, while the side surface 210c of the auxiliary member 210 is on the other side with respect to the first abutting portion J42.
  • the auxiliary member 210 may be disposed so as to slightly protrude from the second metal member 203 on the side.
  • the friction stirring step and the removing step according to the present embodiment are performed by a method substantially similar to that of the tenth embodiment described above.
  • the bonding method according to the thirteenth embodiment described above can provide substantially the same effect as that of the eleventh embodiment. That is, in order to insert the end surface 201a of the first metal member 201 into the concave groove 205 formed by abutting the second metal member 203 and the third metal member 204 and abut the end surface 201a with the bottom surface 205a of the concave groove 205, It is possible to prevent displacement of the first metal member 201, the second metal member 203, and the third metal member 204 during the butting process. Also, the joining method according to the thirteenth embodiment can provide substantially the same effect as that of the tenth embodiment.
  • the auxiliary member 210 is disposed on the surface 204a of the third metal member 204 on one side while the auxiliary member 210 is disposed on the surface 203a of the second metal member 203 on the other side with respect to the first butting portion J42.
  • the side surface 210c is slightly protruded.
  • the auxiliary member 210 and the burr V42 do not remain on the surface 204a of the third metal member 204 on one side while the first butting portion J42 and the second butting portion J43 are friction stir welded.
  • the joining conditions are set so that the burr V42 is generated on the 210 side.
  • the joining method according to the fourteenth embodiment of the present invention will be described in detail with reference to the drawings.
  • the first metal member 301 and the second metal member 302 are butted in a T shape and joined.
  • the joining method according to the present embodiment performs a butt process, a temporary joining process, and a main joining process.
  • the first metal member 301 is a plate-like metal member.
  • the material of the first metal member 301 is appropriately selected from metals capable of friction stir, such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy.
  • the second metal member 302 is a plate-like metal member.
  • the material of the second metal member 302 may be appropriately selected from the metals that can be frictionally stirred, but is preferably the same material as the first metal member 301.
  • the plate thicknesses of the first metal member 301 and the second metal member 302 may be set as appropriate.
  • On the back surface 302 c of the second metal member 302, a concave groove 302 d that opens to the first metal member 301 side is formed on the back surface 302 c of the second metal member 302, a concave groove 302 d that opens to the first metal member 301 side is formed.
  • the concave groove 302 d has a rectangular cross section corresponding to the shape of the first metal member 301.
  • the groove width of the recessed groove 302d is formed to be equal to the plate thickness of the first metal member 301 in this embodiment.
  • the recessed groove 302d is formed so that one end edge of the first metal member 301 can be fitted.
  • the end surface 301a of the first metal member 301 is inserted into the recessed groove 302d of the second metal member 302, the end surface 301a is butted against the bottom surface 302e of the recessed groove 302d, and the butted portion J51 is formed.
  • the groove width of the concave groove 302d is formed to be equal to the plate thickness of the first metal member 301, and therefore the side surfaces 301b and 301c in the plate thickness direction of the first metal member 301 and the concave groove.
  • the side surfaces 302f and 302g in the groove width direction of 302d are in contact with each other, and one end edge of the first metal member 301 is fitted into the concave groove 302d.
  • the temporary bonding step is a step of temporarily bonding the inner corners of the first metal member 301 and the second metal member 302 using a rotary tool (temporary bonding rotary tool) F.
  • a rotary tool temporary bonding rotary tool
  • the spiral groove is formed in a counterclockwise direction from the proximal end toward the distal end.
  • the first inner corner (inner corner) composed of the side surface 301b of the first metal member 301 and the back surface 302c of the second metal member 302 and the side surface 301c of the first metal member 301 and the second metal member 302 are formed. Is inserted into the second inner corner (inner corner) composed of the back surface 302c of the rotating tool F while inclining the rotation center axis thereof.
  • friction stir welding is intermittently performed along the inner corner while the stirring pin F2 is inserted shallowly into the inner corner.
  • the plasticized region W51 is intermittently formed in a dot shape.
  • a tab material temporary bonding step is performed in which the tab material T is temporarily bonded to the end surface on one end side of the second metal member 302.
  • the thickness of the tab material T is the same as the thickness of the second metal member 302.
  • the back surface Tb of the tab material T and the back surface 302c of the second metal member 302 are flush with each other, and the surface Ta of the tab material T and the surface 302b of the second metal member 302 are flush with each other.
  • the tab material T and the second metal member 302 are temporarily joined using the rotary tool F.
  • the main joining step is a step of full-scale friction stir welding of the butt joint J51 using a rotating tool (rotating tool for main joining) F as shown in FIG.
  • the rotating tool F rotated to the right is inserted into the start position Sp set on the tab material T, and the rotating tool F is relatively moved along the abutting portion J51.
  • a plasticizing region W52 is formed in the movement trajectory of the rotary tool F.
  • the friction stir welding is performed with the connecting portion F1 separated from the second metal member 302, that is, the base end side of the stirring pin F2 is exposed.
  • the stirring pin F2 is arranged so that the tip of the stirring pin F2 reaches the first metal member 301, that is, the stirring pin F2, the first metal member 301, and the second metal member 302 are in contact with each other. Set the insertion depth.
  • the insertion depth of the stirring pin F2 may be set so that the stirring pin F2 contacts only the second metal member 302.
  • the butt portion J51 is plastically fluidized and joined by frictional heat between the stirring pin F2 and the second metal member 302.
  • a burr removing process for removing burrs formed in the plasticized region W52 may be performed. Thereby, the surface 302b of the 2nd metal member 302 can be finished finely.
  • the first metal member 301 and the second metal member 302 are spot-temporarily bonded to each other in the temporary bonding step. And misalignment can be prevented. Thereby, joining accuracy can be raised. Moreover, since only the stirring pin F2 is inserted into each metal member in both the main joining step and the temporary joining step, the amount of heat input can be reduced, and the thermal strain of each metal member can be reduced. In particular, in the temporary bonding step, by performing spot temporary bonding, the amount of heat input can be reduced and the bonding time can also be shortened.
  • the load applied to the friction stirrer can be reduced.
  • the butted portion J51 located at a deep position can be joined. That is, since the second metal member 302 can be joined even when the plate thickness is large, the degree of freedom in design can be increased.
  • the end surface 301a of the first metal member 301 is inserted into the concave groove 302d of the second metal member 302 and the end surface 301a is butted against the bottom surface 302e of the concave groove 302d.
  • the metal member 302 can be easily positioned.
  • the temporary bonding rotary tool used in the temporary bonding process and the main bonding rotating tool used in the main bonding process may be different from each other, but by using the rotary tool F as in the present embodiment, There is no need to change the rotating tool in each process. Thereby, joining work can be performed efficiently.
  • spot temporary joining is performed by welding along an inner corner formed by the first metal member 301 and the second metal member 302.
  • a first inner corner (inner corner) and a first metal member constituted by the side surface 301b of the first metal member 301 and the back surface 302c of the second metal member 302 by TIG welding, MIG welding, laser welding, or the like.
  • Welding is intermittently performed at a second inner corner (inner corner) formed by the side surface 301 c of 301 and the back surface 302 c of the second metal member 302.
  • This modification can also provide substantially the same effect as that of the fourteenth embodiment described above.
  • the temporary joining step by performing spot temporary joining by welding, thermal distortion of each metal member can be prevented and temporary joining can be performed in a short time.
  • the first metal member 301 is a plate-like metal member.
  • the material of the first metal member 301 is appropriately selected from metals capable of friction stir, such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy.
  • the second metal member 303 and the third metal member 304 are plate-like metal members.
  • the material of the second metal member 303 and the third metal member 304 may be appropriately selected from the metals that can be frictionally stirred, but is preferably the same material as that of the first metal member 301.
  • the plate thicknesses of the first metal member 301, the second metal member 303, and the third metal member 304 may be set as appropriate.
  • the second metal member 303 has an end surface 303c facing the third metal member 304, a surface 303a continuous with the end surface 303c and extending in a direction orthogonal thereto, and extending in a direction orthogonal to the end surface 303c. It has a back surface 303b, and a first notch 303d formed by cutting out a corner formed by the back surface 303b and the end surface 303c. All the notches 303d are open to the first metal member 301 side and the third metal member 304 side.
  • the first notch 303d has a first notch bottom surface 303e and a first notch side surface 303f.
  • the third metal member 304 includes an end surface 304c facing the end surface 303c, a surface 304a continuous with the end surface 304c and extending in a direction orthogonal to the end surface 304c, and a back surface 304b extending in a direction orthogonal to the end surface 304c. , And a second cutout portion 304d formed by cutting out a corner portion constituted by the back surface 304b and the end surface 304c.
  • the second notch 304d is open to the first metal member 301 side and the second metal member 303 side.
  • the second notch 304d has a second notch bottom surface 304e and a second notch side surface 304f.
  • the second notch bottom surface 304e is continuous with the end surface 304c and extends in a direction orthogonal thereto.
  • the second notch side surface 304f is formed between the second notch bottom surface 304e and the back surface 304b, and extends in a direction orthogonal to the second notch bottom surface 304e and the back surface 304b.
  • the first notch 303d and the second notch 304d are formed symmetrically with respect to the extension line of the first butting portion J52.
  • the first notch 303d and the second notch 304d constitute a single groove 305 in a state where the end face 303c and the end face 304c are abutted with each other.
  • the first notch bottom surface 303e and the second notch bottom surface 304e constitute the bottom surface 305a of the concave groove 305.
  • the first notch side surface 303f constitutes one side surface 305b of the concave groove 305
  • the second notch side surface 304f constitutes the other side surface 305c of the concave groove 305.
  • the concave groove 305 opens to the first metal member 301 side.
  • the concave groove 305 has a rectangular cross section corresponding to the shape of the first metal member 301.
  • the groove width of the concave groove 305 is formed to be equal to the plate thickness of the first metal member 301 in this embodiment.
  • the recessed groove 305 is formed so that one end edge of the first metal member 301 can be fitted.
  • the groove width of the concave groove 305 is formed to be equal to the plate thickness of the first metal member 301, and therefore the side surfaces 301b and 301c in the plate thickness direction of the first metal member 301 and the concave groove.
  • the side surfaces 305b and 305c in the groove width direction of 305 are in contact with each other, and one end edge of the first metal member 301 is fitted in the groove 305.
  • the first inner corner (inner corner) constituted by the side surface 301b of the first metal member 301 and the back surface 303b of the second metal member 303, and the side surface 301c of the first metal member 301 and the third metal member 304 are formed.
  • the rotation tool F is inserted into the second inner corner (inner corner) composed of the back surface 304b while inclining the rotation center axis.
  • friction stir welding is intermittently performed along the inner corner while the stirring pin F2 is inserted shallowly into the inner corner.
  • the plasticized region W51 is intermittently formed in a dot shape.
  • a tab material temporary bonding step is performed in which the tab material T is temporarily bonded to the end surfaces on the one end side of the second metal member 303 and the third metal member 304.
  • the thickness of the tab material T is the same as the thickness of the second metal member 303 and the third metal member 304.
  • the back surface Tb of the tab material T, the back surface 303b of the second metal member 303, and the back surface 304b of the third metal member 304 are flush with each other, and the surface Ta of the tab material T and the second metal member
  • the surface 303a of 303 and the surface 304a of the third metal member 304 are flush with each other.
  • the tab material temporary joining step the tab material T and the second metal member 303 are temporarily joined using the rotary tool F, and the tab material T and the third metal member 304 are temporarily joined.
  • the first abutting portion J52 and the second abutting are performed using the rotary tool (rotary tool for main joining) F (see FIG. 54) as in the fourteenth embodiment.
  • Part J53 is a step of full-scale friction stir welding.
  • the rotating tool F rotated to the right is inserted into the start position set on the tab material T, and the rotating tool F is relatively moved along the first butting portion J52 and the second butting portion J53.
  • a plasticizing region W52 is formed in the movement trajectory of the rotary tool F.
  • the friction stir welding is performed in a state where the connecting portion F1 is separated from the surface 203a of the second metal member 303 and the surface 304a of the third metal member 304, that is, the base end side of the stirring pin F2 is exposed. Moreover, in this embodiment, the stirring pin F2 and the 1st metal member 301, the 2nd metal member 303, and the 3rd metal member 304 contact so that the front-end
  • the insertion depth of the stirring pin F2 may be set so that the stirring pin F2 contacts only the second metal member 303 and the third metal member 304.
  • the second butted portion J53 is plastically fluidized and joined by frictional heat between the stirring pin F2, the second metal member 303, and the third metal member 304.
  • a burr removing process for removing burrs formed in the plasticized region W52 may be performed. Thereby, the surface 303a of the 2nd metal member 303 and the surface 304a of the 3rd metal member 304 can be finished finely.
  • substantially the same effect as that of the fourteenth embodiment can be obtained.
  • the first metal member 301, the second metal member 303, and the third metal member 304 can be easily positioned during the butting process.
  • the inner corner constituted by the first metal member 301 and the second metal member 303 and the first metal member 301 and the third metal member 304 are included. Spot spot joining by welding is performed along the inner corner.
  • the first inner corner (inner corner) and the first metal member constituted by the side surface 301b of the first metal member 301 and the back surface 303b of the second metal member 303 by TIG welding, MIG welding, laser welding or the like.
  • the second inner corner (inner corner) formed by the side surface 301c of the 301 and the back surface 304b of the third metal member 304 is intermittently welded.
  • the metal members are joined so as to have a T-shaped cross section, but may be joined so as to have a substantially L-shaped cross section.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

Selon l'invention, un procédé d'assemblage permettant d'assembler un premier élément métallique (1) et un deuxième élément métallique (2) grâce à un outil rotatif (F) muni d'une tige de malaxage (F2) est caractérisé en ce qu'il comprend : une étape d'aboutement consistant à mettre en butée une surface d'extrémité (1a) du premier élément métallique (1) contre une surface arrière (2c) du deuxième élément métallique (2) pour former une partie de butée (J1) ; une étape de positionnement consistant à placer un élément auxiliaire (10) dans une position correspondant au premier élément métallique (1) à l'intérieur d'une surface avant (2b) du deuxième élément métallique (2) ; et une étape de friction-malaxage consistant à insérer la tige de malaxage rotative (F2) à partir du côté d'une surface avant (10a) de l'élément auxiliaire (10), et effectuer l'assemblage par friction-malaxage de la partie de butée (J1) par déplacement relatif de l'outil rotatif (F) dans un état dans lequel seule la broche de malaxage (F2) est mise en contact avec le deuxième élément métallique (2) et l'élément auxiliaire (10) ou le premier élément métallique (1), le deuxième élément métallique (2) et l'élément auxiliaire (10).
PCT/JP2017/020872 2016-06-20 2017-06-05 Procédé d'assemblage WO2017221684A1 (fr)

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JP2016121683A JP6662210B2 (ja) 2016-06-20 2016-06-20 接合方法
JP2016-186433 2016-09-26
JP2016186433A JP2018051563A (ja) 2016-09-26 2016-09-26 接合方法
JP2016-239275 2016-12-09
JP2016239275A JP6809182B2 (ja) 2016-12-09 2016-12-09 接合方法
JP2017-000452 2017-01-05
JP2017000452A JP2018108595A (ja) 2017-01-05 2017-01-05 接合方法
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JP7140036B2 (ja) * 2019-04-12 2022-09-21 日本軽金属株式会社 接合方法
KR102540195B1 (ko) * 2019-04-12 2023-06-02 니폰게이긴조쿠가부시키가이샤 접합 방법
CN110587165B (zh) * 2019-09-16 2021-02-05 辽宁石油化工大学 一种铝及其合金型材的复合焊接方法

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JP2013000755A (ja) * 2011-06-14 2013-01-07 Hitachi Ltd 高耐食プラント機器
JP2013049072A (ja) * 2011-08-30 2013-03-14 Nippon Light Metal Co Ltd 摩擦攪拌接合方法
WO2015114975A1 (fr) * 2014-01-28 2015-08-06 日本軽金属株式会社 Procédé de soudage par friction-malaxage
JP2016078081A (ja) * 2014-10-17 2016-05-16 日本軽金属株式会社 摩擦攪拌接合方法

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