JP6631417B2 - Joining method - Google Patents

Description

  The present invention relates to a joining method.

  Patent Literature 1 discloses a joining method of performing friction stir welding using a rotary tool on a butted portion formed by joining a cylindrical member and a cylindrical member at end faces thereof. In the joining method, only the stirring pin of the rotary tool is brought into contact with the metal member to be joined to join.

JP-A-2013-131322

  In the conventional joining method, since the shoulder of the rotary tool is not pushed into the metal member to be joined, there is a possibility that the plastic flowing material overflows to the outside and the joint becomes insufficient in metal.

  Therefore, an object of the present invention is to provide a joining method capable of preventing a shortage of metal at a joining portion.

  In order to solve such a problem, the present invention provides a butting step of forming an abutting portion by abutting an end surface of a first metal member having a columnar shape with an end surface of a columnar or cylindrical second metal member. An arranging step of arranging a cylindrical auxiliary member so as to be in surface contact with the outer peripheral surface of the one metal member or the second metal member, and inserting a rotating rotary tool from the surface side of the auxiliary member, and stirring the rotary tool A friction stir step of relatively moving the rotary tool and friction stir welding the butted portion while only the pin is in contact with the first metal member, the second metal member and the auxiliary member. Features.

Further, the present invention provides a butting step of forming a butting portion by abutting an end surface of a first metal member having a columnar shape and an end surface of a columnar or cylindrical second metal member, and the first metal member and the second metal member. An arranging step of arranging a cylindrical auxiliary member so as to be in surface contact with the outer peripheral surface of the metal member, and inserting a rotating rotary tool from the surface side of the auxiliary member, and setting only the stirring pin of the rotary tool to the first metal A friction stir step of frictionally stirring and joining the butting portions by relatively moving the rotary tool in a state where the member is in contact with the second metal member and the auxiliary member ; A removing step of removing from the metal member and the second metal member, wherein in the arranging step, the butt portion is arranged while arranging the auxiliary member on one of the first metal member and the second metal member. Across In the friction stir step, burrs generated by friction stir welding are formed on one side of the first metal member and the second metal member in the auxiliary member. It is characterized in that the joining conditions are set as follows.

  Further, the present invention provides a butting step of forming an abutting portion by abutting an end surface of a cylindrical first metal member and an end surface of a cylindrical second metal member, and the first metal member or the second metal member. An arranging step of arranging a cylindrical auxiliary member so as to be in surface contact with the outer peripheral surface of the member, inserting a rotating rotary tool from the surface side of the auxiliary member, and setting only the stirring pin of the rotary tool to the first metal member A friction stir step of relatively moving the rotating tool in a state of being in contact with the second metal member and the auxiliary member to friction stir weld the butted portion.

Further, the present invention provides a butting step of forming an abutting portion by abutting an end surface of a cylindrical first metal member and an end surface of a cylindrical second metal member, and the first metal member and the second metal member. An arranging step of arranging a cylindrical auxiliary member so as to be in surface contact with the outer peripheral surface of the member, inserting a rotating rotary tool from the surface side of the auxiliary member, and setting only the stirring pin of the rotary tool to the first metal member A friction stir step of relatively moving the rotary tool in a state of being in contact with the second metal member and the auxiliary member to friction stir join the butted portion ; Removing step from the member and the second metal member, and, in the arranging step, while arranging the auxiliary member on one of the first metal member and the second metal member, On the other side In the friction stir step, burrs generated by friction stir welding are formed on one side of the first metal member and the second metal member in the auxiliary member. It is characterized in that joining conditions are set .

  According to this joining method, in addition to the first metal member and the second metal member, the friction stir welding is performed in a state in which the auxiliary member is also in contact with the stirring pin, so that a shortage of metal at the joint can be prevented.

  Preferably, the method further includes a removal step of removing the auxiliary member on which the burrs are formed from the first metal member and the second metal member.

  According to such a joining method, since the burrs can be removed together with the auxiliary member, the burrs can be easily removed.

  Further, in the friction stir step, it is preferable that welding conditions are set so that burrs generated by friction stir welding are formed on the auxiliary member.

  According to this joining method, burrs can be concentrated on the auxiliary member, so that the removing step can be performed more easily.

  Further, in the arranging step, while arranging the auxiliary member on one of the first metal member and the second metal member, arranging the auxiliary member so as to slightly protrude to the other side across the butting portion, In the friction stir step, it is preferable that the joining conditions are set so that burrs generated by friction stir welding are formed on one side of the first metal member and the second metal member among the auxiliary members.

  According to such a joining method, it is possible to prevent a shortage of metal at the joined portion in a well-balanced manner and to remove only the auxiliary member remaining on one side, so that the removing step can be performed more easily.

  ADVANTAGE OF THE INVENTION According to the joining method which concerns on this invention, metal shortage of a joining part can be prevented.

It is a perspective view showing the 1st metal member and the 2nd metal member of the joining method concerning a first embodiment of the present invention. It is sectional drawing which shows the butting process of the joining method which concerns on 1st embodiment. It is sectional drawing which shows the arrangement | positioning process of the joining method which concerns on 1st embodiment. It is a perspective view showing a temporary joining process of a joining method concerning a first embodiment. It is a perspective view showing the friction stir process of the joining method concerning a first embodiment. It is sectional drawing which shows the friction stirring process of the joining method concerning 1st embodiment. It is sectional drawing which shows the removal process of the joining method which concerns on 1st embodiment. It is sectional drawing which shows after the removal process of the joining method which concerns on 1st embodiment. It is sectional drawing which shows the butting process and the arrangement | positioning process of the joining method which concerns on 2nd embodiment. It is a perspective view showing the temporary joining process of the joining method concerning a second embodiment. It is sectional drawing which shows the friction stirring process of the joining method concerning 2nd embodiment. It is sectional drawing which shows the removal process of the joining method concerning 2nd embodiment. It is a perspective view showing the 1st metal member and the 2nd metal member of the joining method concerning a third embodiment. It is sectional drawing which shows the butting process of the joining method which concerns on 3rd embodiment. It is sectional drawing which shows the arrangement | positioning process of the joining method concerning 3rd embodiment. It is sectional drawing which shows the friction stirring process of the joining method concerning 3rd embodiment. It is sectional drawing which shows the removal process of the joining method concerning 3rd embodiment.

[First embodiment]
Next, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the joining method according to the present embodiment is a method in which end surfaces of a first metal member 1a and a second metal member 1b are joined to each other to perform friction stir welding. The joining method according to the present embodiment includes a butting step, an arrangement step, a temporary joining step, a friction stir step, and a removing step. In the following description, “front surface” means a surface opposite to “back surface”.

  As shown in FIG. 1, the first metal member 1 a is a metal member having a substantially cylindrical shape, and has a large-diameter portion 2 and a small-diameter portion 3 having a cylindrical shape protruding from an end surface 11 a of the large-diameter portion 2. And The large diameter part 2 and the small diameter part 3 are formed by concentric shafts. The end surface 11a of the large diameter portion 2 is formed at a position one step lower than the end surface 14a of the small diameter portion 3. On the other hand, the second metal member 1b is a metal member having a cylindrical shape. The first metal member 1a and the second metal member 1b have substantially the same outer diameter, and the outer diameter of the small diameter portion 3 of the first metal member 1a and the inner diameter of the second metal member 1b are substantially equal. I have.

  In the present embodiment, the first metal member 1a and the second metal member 1b are metal materials having the same composition, for example, friction materials such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy. It is formed of a stirrable metal material.

  As shown in FIG. 2, the butting step is a step of butting the first metal member 1a and the second metal member 1b at their end faces. That is, the end surface 11a of the first metal member 1a is brought into close contact with the end surface 11b of the second metal member 1b. As described above, the outer diameter of the first metal member 1a (the outer diameter of the large-diameter portion 2) and the outer diameter of the second metal member 1b are substantially the same. Outer peripheral surfaces 12a and 12b are flush with each other. Further, since the outer diameter of the small diameter portion 3 of the first metal member 1a and the inner diameter of the second metal member 1b are formed substantially equal, when the two members are abutted, the outer peripheral surface 13a of the small diameter portion 3 and the The inner peripheral surface 13b of the bimetallic member 1b makes surface contact.

  As shown in FIG. 2, when the end face 11a of the first metal member 1a and the end face 11b of the second metal member 1b abut against each other, a butted portion J1 is formed. The butting portion J1 is formed continuously around the outer peripheral surfaces 12a and 12b.

  The arranging step is a step of arranging the auxiliary member 5 so as to cover the butted portion J1, as shown in FIGS. The auxiliary member 5 is formed of the same metal as the first metal member 1a and the second metal member 1b, and has a thin plate shape and a ring shape. The auxiliary member 5 has a slit 6 (see FIG. 4) that is continuous in the width direction. The inner diameter of the auxiliary member 5 is substantially equal to the outer diameter of the first metal member 1a and the second metal member 2b. The outer peripheral surface 12a of the first metal member 1a and the outer peripheral surface 12b of the second metal member 1b are in surface contact with the inner peripheral surface 5b of the auxiliary member 5. The plate thickness of the auxiliary member 5 is appropriately set so that the joining portion does not run out of metal at the time of a friction stir process described later. In the arranging step, in the present embodiment, the arranging portion J1 is arranged so that the center portion of the auxiliary member 5 and the butting portion J1 overlap.

  The temporary joining step is a step of temporarily joining the first metal member 1a and the second metal member 1b to the auxiliary member 5, as shown in FIG. In the temporary joining step, in this embodiment, spot temporary attachment is performed using the joining rotary tool F. The joining rotary tool F includes a connecting portion F1 and a stirring pin F2. The joining rotary tool F corresponds to a “rotating tool” in the claims. The joining rotary tool F is formed of, for example, tool steel. The connection part F1 is a part connected to the rotating shaft of the friction stirrer. The connecting portion F1 has a columnar shape.

  The stirring pin F2 hangs down from the connecting portion F1 and is coaxial with the connecting portion F1. The stirring pin F2 tapers as the distance from the connecting portion F1 increases. The length of the stirring pin F2 is larger than the thickness of the auxiliary member 5. A spiral groove is formed in the outer peripheral surface of the stirring pin F2. In the present embodiment, in order to rotate the joining rotary tool F clockwise, the spiral groove is formed counterclockwise from the base end toward the distal end.

  In addition, when rotating the joining rotary tool F counterclockwise, it is preferable to form the spiral groove clockwise from the base end toward the tip end. By setting the spiral groove in this way, the metal plastically fluidized at the time of friction stirring is guided to the distal end side of the stirring pin F2 by the spiral groove. Thereby, the amount of metal overflowing to the outside of the auxiliary member 5 can be reduced.

  In the temporary joining step, only the stirring pin F2 is inserted into only the auxiliary member 5 or the first metal member 1a, the second metal member 1b, and the auxiliary member 5 to be inserted into the first metal member 1a, the second metal member 1b, and the auxiliary member 5. 5 is temporarily joined. In the temporary joining step, the joining rotary tool F is inserted into the auxiliary member 5 at predetermined intervals. The plasticizing region W0 is formed by the temporary joining process. The insertion depth and the joining position of the stirring pin F2 are appropriately set so that the first metal member 1a and the second metal member 1b and the auxiliary member 5 rotate integrally in a friction stir process described later.

  The temporary joining step is performed by friction stir welding in the present embodiment, but may be performed by welding. In this case, the first metal member 1a and the second metal member 1b are spot-welded to the side surface of the auxiliary member 5. In consideration of the removal step described below, it is preferable that the number of spot welds is as small as possible.

  As shown in FIGS. 5 and 6, the friction stir step is a step of friction stir welding the butt portion J1 using the rotation tool F for welding. In the friction stir process, as shown in FIG. 5, the joining rotation tool F rotated right is inserted into the start position Sp set on the surface 5a of the auxiliary member 5, and friction stir welding is performed on the butt portion J1. . As shown in FIG. 5, in the friction stir process, only the stirring pin F2 is brought into contact with the first metal member 1a, the second metal member 1b, and the auxiliary member 5 (the metal member 1 to be joined), and joined along the butt portion J1. Is relatively moved. That is, friction stir welding is performed in a state where the base end side of the stirring pin F2 of the rotary tool F for welding is exposed. In the present embodiment, the position of the joining rotary tool F is fixed, and the welded metal member 1 is rotated in the circumferential direction while the rotation center axis of the joining rotary tool F and the normal of the auxiliary member 5 overlap. A plasticizing region W1 is formed on the movement trajectory of the joining rotary tool F.

  As shown in FIG. 6, the insertion depth of the joining rotary tool F in the friction stir process may be set as appropriate, but in the present embodiment, it is set to be approximately ２〜 to ３ of the height of the butted portion J1. Adjust the insertion depth. Alternatively, the insertion depth may be set such that the stirring pin F2 reaches the small diameter portion 3 and the entire length in the height direction of the butted portion J1 is frictionally stirred. In the friction stir process, the entire periphery of the butted portion J1 is friction stir welded such that the start and end of the plasticized region W1 overlap.

  The removing step is a step of removing the auxiliary member 5 as shown in FIG. In the plasticized region W1, a concave groove D that is a part that is more deeply excavated is formed. In the removing step, starting from the slit 6 of the auxiliary member 5 (see FIG. 5), both ends of the auxiliary member 5 are cut off at the concave groove D as a boundary. The auxiliary member 5 may be removed using a cutting device or the like, but can be removed manually in the present embodiment. As shown in FIG. 8, after the removing step, the burr V is removed together with the auxiliary member 5, so that the surface of the plasticized region W1 can be finely finished without performing a burr removing step using a separate cutting device or the like. it can. Through the above steps, the first metal member 1a and the second metal member 1b are joined.

  According to the joining method according to the present embodiment described above, in the friction stir step, in addition to the first metal member 1a and the second metal member 1b, the auxiliary member 5 is friction-stirred while being in contact with the stirring pin F2. Since the joining is performed, it is possible to prevent a shortage of metal at the joining portion (plasticized region W1). In addition, according to the removing step according to the present embodiment, since the burrs V can be removed together with the auxiliary members 5, the burrs V can be easily removed.

  Also, according to the temporary joining step, the first metal member 1a and the second metal member 1b are temporarily joined to the auxiliary member 5 during the friction stir step. The relative rotation with the auxiliary member 5 becomes impossible. Thus, by fixing the joining rotary tool F and rotating the joined metal member 1 in the circumferential direction, the friction stir welding of the butted portion J1 can be suitably performed. Further, since the plasticized region W0 in the temporary joining step is formed in the center of the auxiliary member 5, it does not hinder the removal of the auxiliary member 5 in the removing step.

  In addition, according to the friction stir process of the present embodiment, since only the stirring pin F2 is inserted into the first metal member 1a, the second metal member 1b, and the auxiliary member 5, the frictional stirrer is compared with a case where the shoulder of the rotary tool is pushed. The load on the stirrer can be reduced. In addition, a deep position of the butt portion J1 can be joined without a large load being applied to the friction stirrer. Further, since the same rotary tool F for welding is used in the temporary welding step and the friction stir step, there is no need to replace the rotary tool. In addition, by providing a step on the end surface 11a of the first metal member 1a, the positioning of the first metal member 1a and the second metal member 1b can be easily performed during the butting process.

  In the friction stir process according to the present embodiment, the position of the welding rotary tool F is fixed, and the metal member 1 to be welded is rotated in the circumferential direction. The joining rotary tool F may be moved with respect to the metal member 1 to be joined by attaching the rotating tool F for joining.

[Second embodiment]
Next, a joining method according to a second embodiment of the present invention will be described. In the joining method according to the second embodiment, the shape of the first metal member 1c and the position of the auxiliary member 5 are different from those of the first embodiment. In the joining method according to the second embodiment, a butting step, an arrangement step, a temporary joining step, a friction stir step, and a removing step are performed. In the bonding method according to the second embodiment, a description will be given mainly of a portion different from the first practical mode.

  As shown in FIG. 9, the first metal member 1c has a columnar shape. The first metal member 1c is formed of the same material as the second metal member 1b. In the butting step, the end face 14c of the first metal member 1c and the end face 11b of the second metal member 1b are butted to form a butted portion J2.

  In the arrangement step, the auxiliary member 5 is arranged along the butting portion J2. In the arrangement step according to the present embodiment, the auxiliary member 5 is arranged at a position where the side surface 5c of the auxiliary member 5 and the butting portion J2 overlap.

  The temporary joining step is a step of temporarily joining the first metal member 1c, the second metal member 1b, and the auxiliary member 5, as shown in FIG. The means for performing the temporary joining is not particularly limited, but in this embodiment, the spot temporary attachment is performed using the joining rotary tool F. In the temporary joining step, the joining rotary tool F is pushed into the butting portion J2, and the first metal member 1c, the second metal member 1b, and the auxiliary member 5 are temporarily joined at predetermined intervals. A plasticized region W0 is formed in the temporarily joined portion.

  As shown in FIG. 11, the friction stir step is a step of friction stir welding the butt portion J2 using the rotary tool F for welding. In this embodiment, as in the first embodiment, the position of the joining rotary tool F is fixed, and the joined metal member 1A (the first metal member 1c, the second metal member 1b, and the auxiliary member 5) is rotated in the circumferential direction. Let it join. In the present embodiment, the joining rotation is performed such that the shearing side (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) of the rotating tool F for joining is the first metal member 1c side. The moving direction and the rotating direction of the tool F are set. The rotation direction and the traveling direction of the joining rotary tool F are not limited to those described above, and may be set as appropriate.

  For example, when the rotation speed of the joining rotary tool F is low, the shear flow is more plastic on the shear side than on the retreating side (the side on which the moving speed of the rotary tool is subtracted from the tangential speed on the outer periphery of the rotary tool). Since the temperature of the material easily rises, a large amount of burrs V tend to occur on the shear side outside the plasticized region W2. On the other hand, for example, when the rotation speed of the joining rotary tool F is high, although the temperature of the plastic flow material increases on the shear side, the burr V increases on the flow side outside the plasticization region W2 due to the high rotation speed. Tends to occur.

  In the present embodiment, since the rotation speed of the joining rotary tool F is set to be high, a large amount of burrs V tend to be generated on the flow side outside the plasticizing region W2 as shown in FIG. Also, by setting the rotation speed of the joining rotary tool F to be high, the moving speed (feeding speed) of the joining rotary tool F can be increased. Thereby, the joining cycle can be shortened.

  In the friction stir step, on which side of the traveling direction of the welding rotary tool F the burr V is generated depends on the welding conditions. The joining conditions include the rotation speed, the rotating direction, the moving speed (feed speed), the inclination angle (taper angle) of the stirring pin F2, the material of the metal member 1A to be joined, and the material of the metal member 1A to be joined. It is determined by each element such as thickness and a combination of these elements. If the side on which burrs V are generated or the side on which burrs V occur frequently is set to the auxiliary member 5 side (the second metal member 1b side in the present embodiment) according to the joining conditions, the removal step described later can be easily performed. It is preferable because it can be performed.

  The removal step is a step of removing the auxiliary member 5 from the second metal member 1b, as shown in FIG. In the removing step, as in the first embodiment, the auxiliary member 5 is removed by bending the auxiliary member 5 starting from the slit 6 (see FIG. 10). Through the above steps, the first metal member 1c and the second metal member 1b are joined.

  According to the joining method according to the present embodiment described above, the cylindrical first metal member 1c and the cylindrical second metal member 1b can be joined. In addition, by arranging the auxiliary member 5 only on the second metal member 1b side, one side of the extension line X of the butt portion J2 can be prevented at the time of the removing step while preventing a shortage of metal at the joint (plasticized region W2). Only the auxiliary member 5 needs to be removed. Thereby, the removing step can be easily performed.

[Third embodiment]
Next, a joining method according to a third embodiment of the present invention will be described. In the joining method according to the third embodiment, the shapes of the first metal member 1d and the second metal member 1e and the arrangement position of the auxiliary member 5 are different from those of the first embodiment. In the joining method according to the third embodiment, a butting step, an arrangement step, a temporary joining step, a friction stir step, and a removing step are performed. In the bonding method according to the third embodiment, a description will be given mainly of a portion different from the first embodiment.

  As shown in FIG. 13, the first metal member 1d has a cylindrical shape. A step surface 11d is formed on the outer peripheral portion of the end surface 10d of the first metal member 1d. On the other hand, the second metal member 1e also has a cylindrical shape. A step surface 11e is formed on the inner peripheral portion of the end surface 10e of the second metal member 1e. The first metal member 1d and the second metal member 1e are formed of the same material. The outer diameter of the first metal member 1d and the outer diameter of the second metal member 1e are substantially equal. The inner diameter of the first metal member 1d and the inner diameter of the second metal member 1e are substantially equal.

  In the butting step, as shown in FIG. 14, the end face 10d and the step face 11d of the first metal member 1d are butted against the step face 11e and the end face 10e of the second metal member 1e. As a result, a butted portion J3 having a crank-shaped cross section is formed. The outer peripheral surfaces 12d and 12e are flush with each other, and the inner peripheral surfaces 13d and 13e are flush with each other.

  In the arrangement step, as shown in FIG. 15, the auxiliary member 5 is arranged along the abutting portion J3. The thickness of the auxiliary member 5 is set so that the joint portion (plasticized region W3) does not become insufficient in metal after performing a friction stir process described later. In the disposing step, the side surface 5c of the auxiliary member 5 is disposed so as to slightly project toward the first metal member 1d with respect to the extension line X of the butt portion J3 while the auxiliary member 5 is brought into surface contact with the second metal member 1e. I do. As a result, the auxiliary member 5 comes into surface contact with both the first metal member 1d and the second metal member 1e.

  The protruding length of the auxiliary member 5 (the distance from the extension line X to the side surface 5c of the auxiliary member 5) is such that, after performing a friction stir process described later, the joint portion (plasticized region W3) does not become metal deficient, and The auxiliary member 5 is set so as not to remain on the first metal member 1d side.

  The temporary joining step is a step of temporarily joining the first metal member 1d, the second metal member 1e, and the auxiliary member 5, similarly to the temporary joining step of the first embodiment, although a specific illustration is omitted. is there. In the temporary joining step, the stirring pin F2 rotated from the surface 5a of the auxiliary member 5 is inserted, and spot temporary attachment is performed.

  As shown in FIG. 16, the friction stir process is a process of performing friction stir welding of the butt portion J3 using the joining rotary tool F. In the friction stir process, the rotated joining rotary tool F is inserted from the surface 5a of the auxiliary member 5, and is relatively moved with respect to the butting portion J3. In the friction stir process, the movement route is set such that the rotation center axis C of the welding rotary tool F overlaps the extension line X of the butting portion J3. Further, similarly to the first embodiment, the position of the joining rotary tool F is fixed, and the joined metal members 1B (the first metal member 1d, the second metal member 1e, and the auxiliary member 5) are rotated in the circumferential direction. Join. Further, in the friction stir process according to the present embodiment, the moving direction and the rotating direction of the joining rotary tool F are set so that burrs V are generated on the second metal member 1e side. That is, in the friction stir process, the joining conditions are set such that burrs V are generated in the first metal member 1d and the second metal member 1e having a larger contact area with the auxiliary member 5.

  In the removing step, as shown in FIG. 17, the burrs V are removed together with the auxiliary members 5 as in the second embodiment. Thus, the first metal member 1d and the second metal member 1e are joined.

  According to the joining method according to the third embodiment described above, the cylindrical first metal member 1d and the cylindrical second metal member 1e can be joined. Further, by providing the step surfaces 11d and 11e, the positioning when the first metal member 1d and the second metal member 1e are butted can be easily performed. Further, according to the arrangement step and the friction stir step according to the present embodiment, it is possible to prevent a shortage of metal at the joint (plasticized region W3) in a better balance than in the second embodiment, and to reduce the first metal member 1d and Since only the auxiliary member 5 remaining on one side of the second metal member 1e needs to be removed, the removing step can be performed more easily.

  Although the embodiments of the present invention have been described above, design changes can be made as appropriate without departing from the spirit of the present invention. For example, in the present embodiment, cylindrical or cylindrical members are joined to each other, but members having other cross-sectional shapes such as an elliptical cross section or a square cross section may be joined. In addition, cylindrical members may be joined. In addition, the end surfaces of the first metal member and the second metal member may be abutted by providing an appropriate step.

  Further, regardless of the shapes of the first metal member and the second metal member, the friction stir process can be performed by employing each of the arrangement processes described in the first to third embodiments. Further, if the first metal member, the second metal member, and the auxiliary member 5 are formed so as not to rotate relative to each other, the temporary joining step may be omitted.

DESCRIPTION OF SYMBOLS 1 Metal member to be joined 1a First metal member 1b Second metal member 5 Auxiliary member F Rotating tool for joining (rotating tool)
F2 Stirring pin J1 Butt joint V Burr W1 Plasticized area

Claims (8)

An end surface of the first metal member having a columnar shape, and a butting step of forming a butted portion by abutting the end surface of the columnar or cylindrical second metal member,
An arranging step of arranging a cylindrical auxiliary member so as to make surface contact with the outer peripheral surface of the first metal member or the second metal member,
Insert the rotating rotating tool from the front side of the auxiliary member, and in a state where only the stirring pin of the rotating tool is in contact with the first metal member, the second metal member and the auxiliary member, the rotating tool is relatively moved. A friction stir step of moving the butted portion to perform friction stir welding.   The joining method according to claim 1, further comprising a removing step of removing an auxiliary member on which burrs are formed from the first metal member or the second metal member.   The welding method according to claim 2, wherein in the friction stir step, welding conditions are set such that burrs generated by friction stir welding are formed on the auxiliary member. An end surface of the first metal member having a columnar shape, and a butting step of forming a butted portion by abutting the end surface of the columnar or cylindrical second metal member,
An arranging step of arranging a cylindrical auxiliary member so as to be in surface contact with the outer peripheral surface of the first metal member and the second metal member,
Insert the rotating rotating tool from the front side of the auxiliary member, and in a state where only the stirring pin of the rotating tool is in contact with the first metal member, the second metal member and the auxiliary member, the rotating tool is relatively moved. A friction stir step of moving the butted portion to friction stir welding ;
A removal step of removing the auxiliary member which burrs are formed from the first metal member and the second metallic member, only containing,
Prior Symbol arrangement step, while arranging the auxiliary member on one of the first metal member and the second metal member, positioned so as to slightly protrude to the other side across the butt portion,
Wherein in the friction stir process, burrs generated in friction stir welding, the first metal member and the second metal one wherein the benzalkonium set the welding conditions so as to form the side members of said auxiliary member junction how to with. An end surface of the first metal member having a cylindrical shape, and a butting step of forming a butted portion by abutting the end surface of the cylindrical second metal member,
An arranging step of arranging a cylindrical auxiliary member so as to make surface contact with the outer peripheral surface of the first metal member or the second metal member,
Insert the rotating rotating tool from the front side of the auxiliary member, and in a state where only the stirring pin of the rotating tool is in contact with the first metal member, the second metal member and the auxiliary member, the rotating tool is relatively moved. A friction stir step of moving the butted portion to perform friction stir welding. The joining method according to claim 5 , further comprising a removing step of removing an auxiliary member on which burrs are formed from the first metal member or the second metal member. The welding method according to claim 6 , wherein in the friction stir step, welding conditions are set such that burrs generated by friction stir welding are formed on the auxiliary member. An end surface of the first metal member having a cylindrical shape, and a butting step of forming a butted portion by abutting the end surface of the cylindrical second metal member,
An arranging step of arranging a cylindrical auxiliary member so as to be in surface contact with the outer peripheral surface of the first metal member and the second metal member,
Insert the rotating rotating tool from the front side of the auxiliary member, and in a state where only the stirring pin of the rotating tool is in contact with the first metal member, the second metal member and the auxiliary member, the rotating tool is relatively moved. A friction stir step of moving the butted portion to friction stir welding;
Seen including a removal step of removing the auxiliary member which burrs are formed from the first metal member and the second metal member,
Prior Symbol arrangement step, while arranging the auxiliary member on one of the first metal member and the second metal member, positioned so as to slightly protrude to the other side across the butt portion,
Wherein in the friction stir process, burrs generated in friction stir welding, the first metal member and the second metal one wherein the benzalkonium set the welding conditions so as to form the side members of said auxiliary member junction how to with.

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