TW201306980A - Joining method - Google Patents

Abstract

A joining method for joining metal members (1), which are a first metal member (1a) and a second metal member (1b) butted on each other, by friction stir welding by moving a rotation tool (G) relative to the metal members. The method includes a first final welding step for applying friction stir welding from the front surface (A) side of the metal members (1) to a butted section (J1) between the first metal member (1a) and the second metal member (1b), a second final welding step for applying friction stir welding from the rear surface (B) side, a third final welding step for applying friction stir welding from one side surface side (C), and a fourth final welding step for applying friction stir welding from the other side surface side (D).; A front surface-side plasticized region (W1) and a rear surface-side plasticized region (W2), and a first side surface-side plasticized region (W3) and a second side surface-side plasticized region (W4) are superposed on each other.

Description

Joining method

The present invention relates to a joining method of a metal member using friction stir.

A method of joining metal members to each other is known as friction stir joining (FSW = Friction Stir Welding). The friction stir welding system rotates the rotary tool and moves along the protruding portions of the metal members, and the metal of the protruding portion is plastically flowed by the frictional heat of the rotary tool and the metal member, whereby the metal members are solid-phase bonded to each other. Further, the rotary tool has a stirring pin (probe) protruding from a lower end surface of a generally cylindrical shoulder.

Here, FIG. 29 and FIG. 30 are perspective views showing a conventional joining method of performing friction stir welding on a pair of metal members. As shown in Fig. 29, when the thickness of the metal member 101 to be joined is larger than the length of the stirring pin of the rotary tool (not shown), after friction stir from the surface 102 side of the metal member 101, from the inside The 103 side was subjected to friction stirring.

That is, in the conventional joining method, the frictional friction is performed from the both sides of the surface 102 and the inner surface 103 along the protruding portion 104 (two-dotted broken line) of the metal member 101, and the thickness of the plasticized regions 105, 106 formed by the frictional friction is formed. The central portion of the direction contacts and engages. Thereby, the joint portion 104 can be joined without a gap. Such a joining method is disclosed in the following Document 1.

Document 1 JP-A-2005-131666 (refer to Figure 7)

However, as shown in Fig. 30, in the case where the thickness of the metal member 111 to be joined is large, even if the friction is stirred from the surface 102 and the inner surface 103, the central portion of the protruding portion 104 (two-dotted line) may be unjoined. unit. In other words, when the thickness of the metal member 111 is relatively large with respect to the length of the stirring pin of the rotary tool (not shown), even if the friction is rubbed from the surface 102 and the inner surface 103 of the metal member 111, the plasticized region 105 cannot be contacted. The central portion of the 106 in the thickness direction is such that a gap 119 is formed in the central portion of the protruding portion 104. As described above, when the gap 119 is continuously generated from the side surface 107 of one side to the side surface 108 of the other side, there is a problem that the watertightness and airtightness of the side surface 107 and the side surface 108 are lowered.

Here, the length of the stirring pin of the rotary tool 1 is increased in accordance with the thickness of the metal member 111, and by friction stir from the surface 102 and the inner surface 103, the metal members 111 can be joined without any gap. However, since the rotary tool is moved while rotating at a high speed by burying the stirring pin in the metal member 111, when the length of the stirring pin becomes large, the load acting on the driving device of the friction stirrer and the stirring pin becomes large, which may result in the device. The problem of short life.

Further, as shown in Figs. 29 and 30, in the plasticized regions 105 and 106, a continuous void defect 109 may be generated from the side surface 107 on one side to the side surface 108 on the other side. The void defect 109 described above causes watertightness and airtightness between the side surface 107 and the side surface 108 of the metal members 101 and 111. Reduced problems.

From this point of view, the present invention provides a joining method for improving the airtightness and watertightness between both side faces of a metal member while performing friction stirring from the front side and the back side of the metal member.

In order to solve the problem, the joining method of the present invention is such that the first metal member and the second metal member are combined to move the rotating tool relative to the joined metal member to perform friction stir, including: the first bonding work, relative to the first The protruding portion of the metal member and the second metal member is frictionally stirred from the surface side of the joined metal member; and the second bonding process is performed by friction stir from the back side of the joined metal member with respect to the protruding portion; In the side joining process, friction stir is performed from the side surface side of the joined metal member with respect to the protruding portion, wherein the plasticized region formed in the first joining process and the second joining process is joined to the side surface The plasticized area formed by the project is repeated.

According to the above-described joining method, the frictional agitation is performed from the surface side and the back side of the joined metal member with respect to the protruding portion, and then the plasticized region that is frictionally stirred from the side surface side of the joined metal member with respect to the protruding portion is repeated, and the side surface is There will be no continuous gaps between them. Thereby, the airtightness and watertightness between the two sides can be improved. Moreover, by using the protruding material, the false joining process and the joining work can be quickly performed and modified to obtain a beautiful joint.

Further, before performing at least one of the first bonding process, the second bonding process, and the side surface process, performing the above-described bumping False joint project of false joints.

When the first to the fourth bonding work is performed, since the rotary tool is pressed into the protruding portion of the first metal member and the second metal member, the force of the first metal member and the second metal member is pulled apart, and the protruding portion is Create an opening. However, according to the above-described joining method, the first and fourth joining works can be appropriately performed by performing false joining of the protruding portions before the first to fourth joining processes.

Further, it is preferable to further include a preliminary project in which a pair of projecting members are disposed on both sides of the protruding portion, and the protruding portion and the protruding portion of the joined metal member are preliminarily frictionally stirred.

Further, it is preferable that a predetermined lower hole is formed at a predetermined insertion position of the rotary tool. According to the above-described joining method, the insertion resistance generated when the rotary tool is pressed into the predetermined position is reduced, and since the rotary tool is guided to the lower hole, the friction stir can be accurately and quickly performed.

Further, the extended distance of the plasticized region formed by the side joining process is larger than the thickness of the protruding portion. According to the above-described joining method, since the length of the plasticized region formed on the side surface of the joined metal member can be made longer than the thickness of the joined metal member, the stress acting on the joined portion can be dispersed. Thereby, the joint strength of the joint portion can be improved.

Further, in the side surface bonding work, the entire length of the protruding portion of the side surface of the joined metal member is traversed, and the plasticized region formed by the side joining work and the first bonding work are performed. And the plasticized area formed in the second bonding work described above is heavy complex. According to the joining method described above, the airtightness and watertightness of the joined metal member can be further improved.

Further, it is preferable that the planar shape of the protruding portion appearing on the side surface of the joined metal member is a combination of a straight line or a straight line. According to the above-described joining method, the planar shape of the protruding portion may include a curved line. However, if it is a combination of a straight line or a straight line, the forming of the protruding surface is easy, and the processing procedure can be omitted.

Moreover, in the present invention, one or more bending points are provided in the planar shape of the protruding portion appearing on the side surface of the joined metal member, and the angle at which the straight lines intersect each other at the bending point is 90 degrees. According to the above-described joining method, at the time of the friction stir joining, the rotary tool that moves linearly along the plane of the protruding portion stops at the bending point, and the frictional stirring is performed at the bending point for a longer time than the other portions. Therefore, by performing the friction stir for a long time at the bending point, since the joint defect can be produced by the processing, the continuous joint defect does not occur along the joint portion, and the airtightness and watertightness at the joint portion are improved.

According to the joining method of the present invention, the protruding portions of the metal members are frictionally stirred from the surface side and the back side of the metal member, and the airtightness and watertightness between the both side faces of the metal member can be improved.

[First Embodiment]

The joining method of the present invention, as shown in Fig. 1, the first metal member is made When the outer periphery 4 of the joined metal member 1 that is in contact with the second metal member 1b is joined by friction stir, the rotation direction and the traveling direction of the joining rotary tool G are set.

First, the joined metal member 1 of the joining method of the present embodiment will be described in detail, and the first projecting member and the second projecting member used for joining the joined metal member 1 will be described in detail.

As shown in Fig. 2, in the present embodiment, the joined metal member 1 is composed of a first metal member 1a and a second metal member 1b having a rectangular cross section, and the protruding portions J1 are formed by individual end faces. . In the present embodiment, the first metal member 1a and the second metal member 1b are metal materials having the same composition, such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, magnesium alloy, etc., which can be friction stir. Made of metal materials. Although the shape and size of the first metal member 1a and the second metal member 1b are not particularly limited, it is preferable that at least the thickness dimension in the protruding portion J1 is the same.

Further, as shown in Fig. 1, the surface of the joined metal member 1 is the front surface A, the inner surface is the inner surface B, the side surface on one side is the first side surface C, and the side surface on the other side is the second side surface D. Further, in the vertical and horizontal directions in the present embodiment, the arrows in the first drawing are used.

As shown in the second (a) and second (b), the first projecting member 2 and the second projecting member 3 are disposed so as to sandwich the protruding portion J1 of the joined metal member 1 and are respectively attached to the joined metal. The member 1 covers the seam (boundary line) of the first metal member 1a and the second metal member 1b which are present on the first side surface C and the second side surface D. Although the material of the first projecting member 2 and the second projecting member 3 is not limited, in the present embodiment, the same group as the joined metal member 1 is used. The formed metal material is formed. Moreover, although the shape and size of the first projecting material 2 and the second projecting material 3 are not particularly limited, in the present embodiment, the thickness dimension thereof is the same as the thickness dimension of the joined metal member 1 in the protruding portion J1.

Next, referring to Fig. 4, the rotary tool F (hereinafter referred to as "false joint rotary tool F") for the false joint work and the rotary tool G for the joint work (hereinafter referred to as "the joint rotary tool G" ) for a detailed description.

The dummy joining rotary tool F shown in Fig. 4(a) has a shoulder portion F1 which is formed of a metal material which is harder than the joined metal member 1 such as tool steel, and which is formed in a columnar shape and protrudes from the shoulder portion F1. Stirring pin (probe) F2 of lower end face F11. The size and shape of the dummy joining rotary tool F can be set in accordance with the material and thickness of the joined metal member 1, but at least the joining rotary tool G used in the first joining work described later (see the fourth ( b) Figure) is still small. In this way, since the dummy engagement can be performed using a load smaller than the present engagement, the load required for the friction stirrer at the time of the false engagement can be reduced, and the moving speed (transport speed) of the dummy joining rotary tool F is estimated to be larger than the joint rotation. The moving speed of the G is also high speed, which can reduce the working time and cost required for the false joint.

The lower end surface F11 of the shoulder portion F1 is a portion that presses the plastic fluidized metal to prevent scattering toward the surroundings. In the present embodiment, the concave surface is formed in a concave shape. Although the outer diameter X ₁ of the shoulder portion F1 is not particularly limited, in the present embodiment, it is smaller than the outer diameter Y ₁ of the shoulder portion G1 of the joining rotary tool G.

The stirring pin F2 hangs from the center of the lower end surface F11 of the shoulder portion F1. In the present embodiment, a tapered truncated cone is formed. Further, on the circumferential surface of the stirring pin F2, a stirring blade provided in a spiral shape is formed. The outer diameter of the stirring pin F2 is not particularly limited. In the present embodiment, the maximum outer diameter (upper end diameter) X _{2 is} larger than the maximum outer diameter (upper end diameter) Y ₂ of the stirring pin G2 of the joining rotary tool G. It is small, and the minimum outer diameter (lower end diameter) X _{3 is} smaller than the minimum outer diameter (lower end diameter) Y _{3 of the} stirring pin G2. The length L _{2 of the} stirring pin F2 is preferably smaller than the length L ₁ of the stirring pin G2 of the joining rotary tool G (see FIG. 4(b)).

As shown in Fig. 4(b), the joining rotary tool G has a shoulder portion G1 which is formed of a metal material which is harder than the joined metal member 1 such as tool steel, and which is formed in a columnar shape and protrudes from the shoulder portion G1. Stirring pin (probe) G2 of lower end face G11.

The lower end surface G11 of the shoulder G1 is formed into a concave shape in the same manner as the dummy joining rotary tool. The stirring pin G2 hangs from the center of the lower end surface G11 of the shoulder portion G1, and in the present embodiment, a tapered truncated cone shape is formed. Further, on the circumferential surface of the stirring pin G2, a stirring blade provided in a spiral shape is formed.

Hereinafter, the bonding method of this embodiment will be described in detail. The joining method of the present embodiment includes (1) a first preparatory work, (2) a first preparatory work, (3) a first joining work, (4) a second preparatory work, and (5) a second preparatory work, (6) ) The second joint project, (7) the protruding material cutting project, (8) the third preparatory project, (9) the third preparatory project, (10) the third joint project, and (11) the fourth preparatory project, (12) The fourth preparatory work, (13) the fourth joint project, and (14) the protruding material removal project.

Further, as shown in Fig. 1, (2) the first preliminary work and (3) the first joint work is a work carried out from the surface A side, (5) the second preliminary work, and (6) the second joint work It is the work carried out from the B side inside, (9) The third preparatory work (10) The third joining work is a work performed from the first side C side, (12) the fourth preparatory work, and (13) the fourth joining work is a work performed from the second side D side. In the present embodiment, all of the rotation directions of the dummy joining rotary tool F and the joining rotary tool G are rotated to the right. In this way, the rotation directions of the dummy joining rotary tool F and the joining rotary tool G are unified, and the work program can be saved.

(1) First preparation project

The first preparation project will be described with reference to Figs. 2 and 3. The first preparation process is a process of preparing the abutting members (the first projecting member 2 and the second projecting member 3), and the abutting member is provided with the start position and the end position of the friction stir in the first and second joining processes. In the first embodiment, the first preparation project includes a projecting process of projecting the first metal member 1a and the second metal member 1b (1-1), and disposing the first projecting member 2 and the second projecting member 3 on the joined metal member. The projecting material arrangement of the both sides (1-2) of the protruding portion J1 of 1 and the welding of the joined metal member 1 (1-3) by welding the first projecting member 2 and the second projecting member 3 The installation of the joined metal member 1 on the gantry (1-4) of the friction stirrer (not shown) is provided.

(1-1) Projection

In the projecting process, as shown in FIGS. 2 and 3, the end surface 11b of the second metal member 1b is brought into close contact with the end surface 11a of the first metal member 1a. Further, the surface 12a of the first metal member 1a is flush with the surface 12b of the second metal member 1b, and the inner surface 13a of the first metal member 1a is flush with the inner surface 13b of the second metal member 1b. Also, similarly, the first side surface 14a of the first metal member 1a is flush with the first side surface 14b of the second metal member 1b. Flat, the second side surface 15a of the first metal member 1a is flush with the second side surface 15b of the second metal member 1b.

Further, the surface A is formed by the surface 12a of the first metal member 1a and the surface 12b of the second metal member 1b, and the inside B is formed by the inner surface 13a of the first metal member 1a and the inner surface 13b of the second metal member 1b. The first side surface C is formed by the first side surface 14a of the first metal member 1a and the first side surface 14b of the second metal member 1b, and the second side surface D is formed by the second side surface 15a of the first metal member 1a and the second metal The second side 15b of the member 1b is formed.

(1-2) Projection configuration project

In the projecting material arrangement, as shown in FIG. 2(b), the first projecting material 2 is disposed on the first side face C side of the protruding portion J1, and the abutting surface 21 is brought into contact with the first side face C. Further, the second projecting member 3 is disposed on the second side face D of the protruding portion J1, and the abutting surface 31 is brought into contact with the second side face D. At this time, as shown in FIG. 3(b), the surface 22 of the first protruding member 2 and the surface 32 of the second protruding member 3 are flush with the surface A of the joined metal member 1, while the inside of the first protruding member 2 is 23 and the inner side 33 of the second projecting member 3 are flush with the inner side B of the joined metal member 1.

(1-3) Welding engineering

In the welding process, as shown in the second (a) and second (b) drawings, the inner corner portions 2a, 2b formed by the joined metal member 1 and the first projecting member 2 are welded to each other to join the metal member 1 A false engagement with the first protrusion 2 is made. Further, the inner corner portions 3a, 3b formed by the joined metal member 1 and the second protruding member 3 are welded to make the joined metal member 1 and the second protruding member 3 falsify Engage. Further, the welding may be continuously performed across the entire length of the inner corner portions 2a, 2b and 3a, 3b, and the welding may be performed intermittently.

(1-4) Setting up the project

In the installation process, the joined metal member 1 after the first projecting member 2 and the second projecting member 3 are falsely joined is placed on a gantry of a friction stirrer (not shown), for example, by using a clamp. Can not move. The friction stirrer of the present embodiment is a device that is set by friction stir from above the joined metal member 1.

Further, in the first preparation process, when the welding process is omitted, the projecting of the projecting and projecting of the projecting material can be performed on the gantry of the friction stirrer (not shown).

(2) First preparatory work

The first preparatory work is a preliminary work performed before the first joining work, and in the present embodiment, the joining of the joined metal member 1 and the protruding portion J3 of the second protruding member 3 is performed on the surface A side (2- The second projecting material joining work of 1), the (2-2) false joining process of joining the protruding portion J1 of the joined metal member 1, and the joining of the joined metal member 1 and the protruding portion J2 of the first protruding material 2 (2- 3) The first projecting material joining process, the lower hole forming process in which the lower hole is formed at the start position (2-4) of the friction stir of the first joining work.

In the first preparatory work, as shown in Fig. 6, one of the false engagement rotary tools F is moved to form a continuous movement trajectory, and the frictional agitation is continuously performed on the projections J3, J1, and J2. In other words, the stirring pin F2 (see FIG. 4(a)) of the dummy joining rotary tool F inserted into the friction stirring start position S _P1 is moved to the end position E _P1 without departing from the middle. Further, in the present embodiment, the start position S _P1 of the friction stir is provided in the second protrusion 3, and the end position E _P1 is provided in the first protrusion 2, but the position of the start position S _P1 and the end position E _P1 is set. There is no limit.

The procedure of the friction stir in the first preparatory work of the present embodiment will be described in more detail with reference to Figs. 5 and 6.

First, as shown in Fig. 5(a), the dummy joining rotary tool F is placed directly above the start position S _P1 of the appropriate portion of the second protruding member 3, and then the dummy joining rotary tool F is rotated to the right side. The stirring pin F2 is pressed against the starting position S _P1 . The rotational speed of the dummy joining rotary tool F is set in accordance with the size and shape of the stirring pin F2, the material and thickness of the joined metal member 1 for performing friction stir, and the like, but in many cases, it is set at 500 to 2000. Within the range of (rpm).

When the stirring pin F2 comes into contact with the surface 32 of the second protruding member 3, the metal around the stirring pin F2 is plastically fluidized by frictional heat, and as shown in FIG. 5(b), the stirring pin F2 is inserted into the second protruding member 3. .

After the entire stirring pin F2 enters the second protruding material 3 and the lower end surface F11 of the shoulder portion F1 is in full contact with the surface 32 of the second protruding material 3, as shown in FIG. 6, the dummy joining rotary tool F is rotated to the second The starting point s2 of the projecting joint project is relatively moved.

The moving speed (transport speed) of the dummy joining rotary tool F is set in accordance with the size and shape of the stirring pin F2, the material and thickness of the joined metal member 1 that performs friction stir, and the like. However, in many cases, the setting is made. In the range of 100~1000 (mm/min). When the fake joint is moved by the rotary tool The rotation speed at the time of insertion is the same or lower. Further, when the dummy joining rotary tool F is moved, the axis of the shoulder portion F1 is slightly inclined toward the rear in the traveling direction with respect to the straight line of the lead, and is vertically inclined without being inclined, and the direction of the dummy joining rotary tool F is easily changed. Do complicated exercises. When the dummy joining rotary tool F is moved, the metal around the stirring pin F2 is plastically fluidized in order, and at the same time, the plastic fluidized metal is hardened again at the position separated from the stirring pin F2.

When the dummy joining rotary tool F is relatively moved and the friction stir is continuously performed until the starting point s2 of the second protruding material joining process, the dummy joining rotary tool F is moved to the second protruding material joining process without departing from the starting point s2.

(2-1) Second protruding material joint project

In the second projecting material joining process, the second protruding member 3 and the protruding portion J3 of the joined metal member 1 are frictionally stirred. Specifically, a route of friction stir is set on a joint (boundary line) of the joined metal member 1 and the second protruding member 3, and the dummy joining rotary tool is relatively moved along the path. The joint portion J3 is subjected to friction stirring. Further, in the present embodiment, the dummy joining rotary tool F is continuously frictionally agitated from the first projecting material joining work s2 to the end point e2 without departing from the drawing.

Further, when the dummy joining rotary tool F is rotated rightward, since the left side of the traveling direction of the dummy joining rotary tool F has a fine void defect, it is preferable to set the starting point s2 of the second protruding material joining work. At the position of the end point e2, the joined metal member 1 is positioned on the right side in the traveling direction of the dummy joining rotary tool F. So, it is difficult due to void defects It is produced on the side of the joined metal member 1 to obtain a high-quality joined body.

In other words, when the dummy joining rotary tool F is rotated to the left, since the right side of the traveling direction of the dummy joining rotary tool F has a fine void defect, it is preferable to set the start point and the end point of the second protruding material joining work. The position is such that the engaged metal member 1 is located on the left side in the traveling direction of the dummy joining rotary tool F. Specifically, although the drawing is omitted, the starting point may be set to the end point e2 when the dummy joining rotary tool F is rotated rightward, and the end point may be set to the position of the starting point s2 when the false joining rotary tool F is rotated rightward.

Further, when the stirring pin F2 of the dummy joining rotary tool F enters the protruding portion J3, although the force of the joined metal member 1 and the second protruding member 3 is pulled apart, the joined metal member 1 and the second protruding member 3 are acted upon. The formed inner corner portions 3a and 3b (see FIG. 2) are falsely joined by welding, and no opening is formed between the joined metal 1 and the second protruding member 3.

(2-2) False joint engineering

After the dummy joining rotary tool F reaches the end point e2 of the second projecting engagement project, the friction stir is not ended at the end point e2, and the friction stir is continuously performed until the starting point s1 of the dummy joining process, and the state is shifted to the false joining process. In other words, from the end point e2 of the second projecting material joining process to the starting point s1 of the dummy joining process, the dummy joining rotary tool F continues to perform friction stir without departing from the starting point s1, and the dummy joining rotary tool F moves without departing from the starting point s1. To the fake joint project. In this way, at the end point e2 of the second projecting material joining process, the detachment work of the dummy joining rotary tool F is not required, and since the insertion work of the dummy joining rotary tool F is not required at the starting point s1 of the false joining work, the preliminary work can be made The joining work is becoming more efficient.

In the present embodiment, the path of the friction stir from the end point e2 of the second protruding material joining process to the starting point s1 of the false joining process is set to the second protruding material 3, and the dummy joining rotary tool F is joined from the second protruding material. The movement trajectory of the starting point s1 at which the end point e2 is moved to the false engagement project is formed in the second protrusion 3. As described above, in the process in which the end point e2 of the second projecting material joining process moves to the starting point s1 of the dummy joining process, the joined metal member 1 is less likely to cause void defects, and a high-quality joined body can be obtained.

In the dummy joining process, the joint portion J1 (see FIG. 6) of the joined metal member 1 is subjected to friction stir. Specifically, a path of friction stir is set on the joint (boundary line) of the joined metal member 1, and the pseudo joining rotary tool F is relatively moved along the path to continuously traverse the entire length of the protruding portion J1. Perform friction stir. Further, in the present embodiment, the dummy joining rotary tool F is continuously frictionally agitated from the starting point s1 to the end point e1 of the false joining process without departing from the middle.

After the false engagement rotary tool F reaches the end point e1 of the false engagement work, the friction stir is not ended at the end point e1, and the friction stir is continuously performed to the end point s3 of the first projecting engagement project, and the state is transferred to the first projecting material engagement. engineering. In other words, from the end point e1 of the dummy joining process to the starting point s3 of the first projecting material joining process, the dummy joining rotary tool F is continuously frictionally agitated without departing from the starting point s3, and the starting joint s3 is moved to the first point without the detachment of the rotary joining tool F. A protruding material joint project.

In the present embodiment, the path of the friction stir of the end point e1 of the dummy joining process to the starting point s3 of the first projecting material joining process is set to the first projecting material 2, and the dummy joining rotary tool F is moved from the end point e1 of the false joining process. A movement trajectory to the starting point s3 of the first projecting material joining process is formed on the first protruding material 2. As described above, in the process of moving the end point e1 of the dummy joining process to the starting point s3 of the first projecting material joining process, it is difficult for the joined metal member 1 to generate void defects, and a high-quality joined body can be obtained.

(2-3) First protruding material joint project

In the first projecting material joining process, the joint portion of the joined metal member 1 and the first projecting member 2 is frictionally stirred. Specifically, a path of friction stir is set on the joint (boundary line) of the joined metal member 1 and the first protruding member 2, and the pseudo joining jigsaw F is relatively moved along the path, and the juncture portion J2 is moved. Friction stir. Further, in the present embodiment, the dummy joining rotary tool F is continuously frictionally agitated from the starting point s3 to the end point e3 of the first projecting material joining process without departing from the drawing.

Further, since the dummy joining rotary tool F is rotated rightward, the position of the starting point s3 and the end point e3 of the first protruding material joining process is set, and the engaged metal member 1 is positioned on the right side in the traveling direction of the dummy joining rotary tool F, It is difficult to generate void defects on the side of the joined metal member 1, and a high-quality bonded body can be obtained. In other words, when the dummy joining rotary tool F is rotated to the left, it is preferable to set the position of the start point and the end point of the first projecting material joining work so that the engaged metal member 1 is located on the left side in the traveling direction of the dummy joining rotary tool F. . Specifically, although the drawing is omitted, the starting point may be set to the end point e3 when the dummy joining rotary tool F is rotated rightward, and the end point may be set to the position of the starting point s3 when the false joining rotary tool F is rotated right.

Further, when the stirring pin F2 of the dummy joining rotary tool F enters the protruding portion J2, the force that pulls the joined metal member 1 and the first protruding member 2 apart The effect is that the inner corner portions 2a, 2b (see FIG. 2) formed by the joined metal member 1 and the first protruding member 2 are falsely joined by welding, and between the joined metal 1 and the first protruding member 2 No openings will be created.

After the dummy joining rotary tool F reaches the end point e3 of the first projecting material joining process, the friction stirring is not continuously completed at the end point e3, and the friction stirring is continuously performed until the end position E _P1 of the first projecting material 2 is provided. Further, in the present embodiment, the end position E _{P1 is} provided on the extension line of the seam (boundary line) presented on the surface A side of the joined metal member 1. In other words, the end position E _P1 is the start position S _M1 of the friction stir in the first joining work to be described later.

After the dummy joining rotary tool F reaches the end position E _P1 , the dummy joining rotary tool F is raised while rotating, and the stirring pin F2 is disengaged from the end position E _P1 .

(2-4) Lower hole formation project

Next, the formation of the lower hole is carried out. The lower hole forming process is as shown in Fig. 4(b), which is a process of forming the lower hole P1 at the start position of the friction stir in the first joining work. In the lower hole forming process in the first preparatory work, the lower hole P1 is formed at S _M1 set on the surface 22 of the first projecting material 2.

The purpose of the lower hole P1 is to reduce the insertion resistance (pressing impedance) of the stirring pin G2 of the joining rotary tool G. In the present embodiment, the stirring pin F2 of the dummy joining rotary tool F (see the fourth ( a) The pull hole H1 formed when the detachment is formed is formed by reaming a drill (not shown). When the hole H1 is used, the work of forming the lower hole P1 can be simplified, and the working time can be shortened. The form of the lower hole P1 is not particularly limited, and is cylindrical in the present embodiment. Further, in the present embodiment, although the first protrusion 2 is formed in the lower hole P1, the position of the lower hole P1 is not particularly limited, and may be formed on the second protruding material 3, although it may be formed on the protruding portions J2 and J3, but it is preferably formed in the joined metal member 1 as in the present embodiment. On the extension line of the seam (boundary line) of the joined metal member 1 on the surface A side.

In the present embodiment, the case where the lower hole P1 is formed by expanding the hole H1 of the stirring pin F2 (see FIG. 4(a)) of the dummy joining rotary tool F as an example, the stirring pin F2 is used as an example. The maximum outer diameter X _{2 is} larger than the minimum outer diameter Y ₃ of the stirring pin G2 of the joining rotary tool G, and the maximum outer diameter X _{2 of the} stirring pin F2 is larger than the maximum of the stirring pin G2 of the joining rotary tool G. In the case where the outer diameter Y _{2 is} still small (Y ₃ <X ₂ <Y ₂ ), the extraction hole F1 of the stirring pin F2 can still form the lower hole P1.

(3) The first joint project

The first joining process is a process of actually joining the projections J1 on the surface A side of the joined metal member 1. In the first joining process of the present embodiment, the joint rotating tool G shown in Fig. 4(b) is used, and the protruding portion J1 in the state of the false joint is from the surface A side of the joined metal member 1 Perform friction stir.

In the first joining process, as shown in Figs. 7(a) to 7(c), the stirring pin G2 of the joining rotary tool G is inserted into the lower hole P1 formed at the starting position S _M1 , and the stirring pin inserted is inserted. G2 moves to the end position E _M1 without departing from the middle. That is, in the first joining process, the friction stir is started from the lower hole P1, and the friction stirring is continuously performed until the end position E _M1 .

Here, at the time when the first preparatory work is completed, the friction stirrer having the dummy joining rotary tool F is located directly above the end position E _P1 of the first projecting material 2 (see FIG. 6), if the first The starting position of the joining work is S _M1 , and the first stirring work is performed without the movement of the friction stirring device of the joining rotary tool G, and the work can be omitted.

Further, in the present embodiment, the start position S _{M1 of the} friction stir is provided on the first protrusion 2, and the end position E _M1 is provided on the second protrusion 3, but the position of the start position S _M1 and the end position E _M1 is set. There is no limit.

The first bonding process will be described in more detail with reference to Figures 7(a) to 7(c).

First, as shown in Fig. 7(a), the joining rotary tool G is positioned directly above the lower hole P1 (starting position S _M1 ), and then the joining rotary tool G is rotated while being rotated rightward to be stirred. The front end of the pin G2 is inserted into the lower hole P1. When the stirring pin G2 enters the lower hole P1, the circumferential surface (side surface) of the stirring pin G2 abuts against the hole wall of the lower hole P1, and the metal starts to plastically flow from the hole wall. When it is in this state, the plasticized flowing metal is pushed back on the circumferential surface of the stirring pin G2, and the pressing force of the stirring pin G2 can reduce the press-in impedance at the initial stage of press-fitting, and the shoulder of the joining rotary tool G. Before the portion G1 abuts against the surface 22 of the first protruding member 2, the stirring pin G2 abuts against the lower hole P1 to generate frictional heat, so that the time to plastic fluidization can be shortened. That is, the load of the friction stirrer is reduced, and the work time required for the joining process can be shortened.

After the entirety of the stirring pin G2 enters the first protruding material 2 and the lower end surface G11 of the shoulder G1 is in contact with the surface 22 of the first protruding material 2, as shown in FIG. 7(b), the friction stir is applied to the present invention. The joining rotary tool G relatively moves toward one end of the protruding portion J1 of the joined metal member 1, and also protrudes into the protruding portion J1 across the protruding portion J2. When the joining rotary tool G is moved, the metal around the stirring pin G2 is plastically fluidized in order. At the same time, the plastic fluidized metal is hardened again at a position separated from the stirring pin G2 to form a plasticized region (hereinafter referred to as "surface-side plasticized region W1").

The moving speed (transport speed) of the joining rotary tool G is set in accordance with the size and shape of the stirring pin G2, the material and thickness of the joined metal member 1 such as friction stir, and the like. However, in many cases, the setting is set. In the range of 30~300 (mm/min).

When the amount of heat entering the joined metal member 1 is excessively large, it is preferable to supply water from the surface A side to the periphery of the joining rotary tool G to be cooled. Further, when the cooling water enters between the first metal member 1a and the second metal member 1b, the oxide film is formed on the joint surface (see the end faces 11a, 11b and 2(b)), and this embodiment is In the meantime, the hole between the metal members 1 to be joined is closed by the dummy joining process, and it is difficult for the cooling water to flow between the metal members 1 to be joined, and the quality of the joint portion is not deteriorated.

At the protruding portion J1 of the joined metal member 1, the path of the friction stir is set to the joint set to the joined metal member 1 (on the movement trajectory in the dummy joining process), and the joining rotary tool is made along the path. G is relatively moved, and friction stir is continuously performed from one end to the other end of the protruding portion J1. The joining rotary tool is relatively moved to the other end of the protruding portion J1, and the frictional stirring is performed while crossing the protruding portion J3, and the relative movement is performed toward the end position E _{M1 in} this state.

Further, in the present embodiment, the first joint work is performed by setting the start position S _{M1 of the} friction stir to the extension line of the joint (boundary line) of the joined metal member 1 on the surface A side of the joined metal member 1. The path of the friction stir in the line becomes a straight line. When the path of the friction stir is a straight line, the movement distance of the joint rotating tool G is minimized, the efficiency of the first joining work can be efficiently performed, and the amount of wear of the joining rotary tool G can be reduced.

When the joining rotary tool G reaches the end position E _M1 , as shown in Fig. 7 (c), the joining rotary tool G is raised while rotating, and the stirring pin G2 is moved from the end position E _M1 (refer to the seventh (b) Figure) Detachment. Further, at the end position E _M1 , when the stirring pin G2 is disengaged upward, the cutout hole Q1 having the same shape as the stirring pin G2 is inevitably formed, and remains in the present embodiment.

It is preferable that the rotation speed (rotation speed at the time of disengagement) of the joining rotary tool G when the stirring pin G2 of the joining rotary tool G is separated from the end position E _M1 is higher than the rotation speed during the movement. In this way, compared with the case where the rotation speed at the time of the detachment is the same as the rotation speed at the time of the movement, the detachment of the agitation pin G2 at the end position E _M1 can be quickly performed because the detachment resistance of the agitation pin G2 is small.

Further, in the present embodiment, the first preparatory work is performed before the first joining work, but the first preliminary work is omitted, and the first joining work can be directly performed after the first preparatory work.

(4) Second preparation project

The second preparatory work is a preparatory work performed before the second preparatory work. In the present embodiment, the rear side B side of the joined metal member 1 is placed upward, and is again provided in a friction stirrer (not shown).

(4-1) Reset the project

In the re-installation process, after the restraint of the joined metal member 1 that completes the first joining process is released, the front and back of the joined metal member 1 are reversed, and the inner side B side faces upward, and is again set to the friction stirrer. On the gantry. In the present embodiment, as shown in Fig. 1, the joined metal member 1 is half-rotated on the front and rear axes, and the front and back of the joined metal member 1 are reversed.

Here, the eighth (a) is a cross-sectional view from the protruding portion J1 toward the first metal member 1a side after the re-installation of the second preparatory work of the first embodiment. As shown in Fig. 8(a), in the re-installation process, the upper surface of the joined metal member 1 becomes the inner side B, and the first protruding material 2 is located when the first metal member 1a is directed from the side of the protruding portion J1. The left side of the metal member 1 is joined, and the second protrusion 3 is located on the right side of the joined metal member 1.

Further, in the form of the friction stirrer, the front and back are rotated without releasing the restraint of the joined metal member 1.

(5) Second preparatory work

The second preparatory work is a work performed before the second joining work, and the first projecting material joining project of the joined metal member 1 and the protruding portion J2 of the first projecting material 2 (5-1) on the B side of the inside is performed. (5-2) false joint work for joining the joint portion J1 of the joined metal member 1, and second joint material joining work for joining the jointed metal member 1 and the protruding portion J3 of the second projecting member 3 (5-3) The lower hole is formed in the lower hole forming process at the start position (5-4) of the friction stir of the first joining work. Further, in the (5-1) first projecting material joining work, the (5-2) false joining work, and the (5-3) second protruding material joining work, the dummy joint rotating tool F is used.

(5-1) First protruding material jointing project, (5-2) false joint project and (5-3) second protruding material joint project

(5-1) First protruding material joining work, (5-2) false joining work, and (5-3) second protruding material joining work are (2-3) first protruding materials with the above-mentioned first preparatory work The joint project, (2-2) false joint project and (2-1) second projecting joint project are roughly the same. As shown in Fig. 8(b), one of the dummy joining rotary tools F is moved to form a continuous moving locus, and the friction stir is continuously performed in the order of the protruding portions J2, J1, and J3. In other words, the stirring pin F2 (see FIG. 4(a)) of the dummy joining rotary tool F inserted at the start position S _P2 of the friction stir is continuously moved to the end position E _P2 without being disengaged, and is continuously carried out (5-1 The first projecting joint project, (5-2) the false joint project, and (5-3) the second projecting joint project. Further, the end position E _P2 becomes the start position S _M2 of the second joining work performed later.

Here, in the first preparatory work, as shown in FIG. 6, the second protruding material joining process, (2-2) false joining work, and (2) are sequentially performed from the second protruding material 3 side. -3) First protruding material joining project. On the other hand, in the second preliminary work, when the first protruding member 2 is located on the left side of the joined metal member 1 from the side of the protruding portion J1 toward the metal member 1a, at the time point when the first bonding work is completed, The friction stirrer provided with the joining rotary tool G is positioned above the first projecting material 2, and sequentially (5-1) the first projecting material joining process and the (5-2) false joining work are performed from the first projecting material 2 side. And (5-3) the second protruding material joining project. As described above, since the moving distance of the friction stirrer including the dummy joining rotary tool F is small, work can be saved.

Further, the detailed description of the (5-1) first protruding material joining process, the (5-2) false joining work, and the (5-3) second protruding material joining work is omitted since it is substantially the same as the first preliminary work.

(5-4) Lower hole formation project

The lower hole forming process is as shown in Fig. 9(a), which is a process of forming the lower hole P2 at the start position S _M2 of the friction stir in the second joining work. That is, the lower hole forming process is a process of inserting the predetermined position of the stirring pin G2 of the main hanging tool G of the present bonding to the formation of the lower hole P2. Thereby, the insertion resistance (pressing impedance) of the stirring pin G2 of the joining rotary tool G can be reduced.

Further, since the (5-4) lower hole forming process is approximately equal to the (2-4) lower hole forming process of the first preparatory work, the detailed description is omitted.

(6) The second joint project

The second joining process is a process in which the joint portion J1 on the inner side B side of the joined metal member 1 is actually joined. In the second joining process of the present embodiment, the joining rotary tool G is used, and the protruding portion J2 in the false engagement state is frictionally stirred from the inner side B side of the joined metal member 1.

In the second joining process, the stirring pin G2 of the joining rotary tool G is inserted (pressed) into the S _M2 set to the inner face 33 of the second projecting member 3 as shown in Figs. 9(a) and 9(b). The inserted stirring pin G2 moves to the end position E _M2 without departing from the middle. In the second joining process, friction stir is started from the lower hole P2, and the operation is continued until the end position E _M2 . That is, the start position S _M2 of the second joining work is located above the end position E _M1 side of the first joining work. When the joint rotating tool G is moved, the metal around the stirring pin G2 is plastically fluidized in sequence, and the plastic fluidized metal is hardened again at a position separated from the stirring pin G2 to form a plasticized region (hereinafter referred to as "Inside side plasticized area W2").

Here, at the time when the second preparatory work is completed, the wiping agitating device including the dummy joining rotary tool F is located directly above the end position E _P2 of the second projecting member 3 (see FIG. 8(b)). When the start position S _{M2 of the} second joining work is set above the second protruding material 3, the first stirring work can be performed without moving the friction stirring device including the joining rotary tool G, and the work can be omitted.

The second joining process is substantially the same as the first joining process, and detailed description thereof will be omitted. Further, in the present embodiment, the second preliminary work is performed, but the second preliminary work may be omitted and the second joint work may be directly performed after the first joint work.

(7) Projection of protruding material

In the projecting of the protruding material, the first projecting member 2 and the second projecting member 3 are cut off from the joined metal member 1. In the present embodiment, when the joined metal member 1 whose second joining process is completed is removed from the gantry of the friction stirrer, the first protruding member 2 is cut along the protruding portions J2, J3 using a cutting tool (not shown). And the second protruding material 3. At this time, it is preferable to remove the burrs formed on the surface A and the inside B of the joined metal member 1. As a result, the first projecting member 2' and the second projecting member 3' can be in close contact with the joined metal member 1 when the (8-1) projecting material arrangement project described later is performed.

Fig. 10 is a perspective view of the joined metal member 1 after the projecting of the protruding material. As shown in Fig. 10, the surface side plasticized region W1 and the back side plasticized region W2 form a connection from the first side surface C across the second side surface D. Continued. On the other hand, between the front side plasticized region W1 and the back side plasticized region W2, a small gap (unjoined portion) is continuously formed from the first side surface C to the second side surface D.

Here, in the front side plasticized region W1 and the back side plasticized region W2, the traveling direction of the joining rotary tool G (see the arrows V ₁ and V ₂ ) is on the left side, that is, on the second metal member 1b. The first side surface C spans to the second side surface D to continuously generate void defects R ₁ , R ₂ .

(8) Third preparation project

When the third preparation work is performed on the first side surface C side, the preparation process of the abutting members (the first projecting member 2' and the second projecting member 3') is prepared, and the friction stirring start position of the joined metal member 1 is prepared. And the end position is provided on the abutting member. In the third embodiment, in the present embodiment, the projecting material arrangement of the first projecting material 2' and the second projecting material 3' (8-1) is disposed on both sides of the protruding portion J1 of the joined metal 1, and the welding is performed by welding. The first protruding material 2 ′ and the second protruding material 3 ′ are falsely joined to the welding process of the joined metal member 1 ( 8-2 ), and the first side surface C of the joined metal member 1 faces upward, and is provided on the unillustrated surface. Re-installation of the rig on the friction stirrer (8-3).

(8-1) Projection configuration project

In the projecting material arrangement, as shown in Fig. 11, in the joined metal member 1 after the second joining process is completed, the second protruding material 3' is placed on the surface A to cover the protruding portion J1, and the abutting portion is made. The face 31 abuts against the surface A. Further, the second projecting member 3' is disposed on the surface B side to cover the protruding portion J1, and the abutting surface 21 is brought into contact with the inner surface B. At this time, with (1-2) protruding material configuration The works are the same, and the surface and the inside of the first projecting member 2' and the second projecting member 3' are flush with the first side face C and the second side face D.

(8-2) Welding project

In the welding process, as shown in Fig. 11, the joined metal members 1 and the inner corner portions 2a', 2b' formed by the first projecting members 2' are welded to join the joined metal members 1 and the first projecting members 2' . Further, the joined metal members 1 and the inner corner portions 3a' and 3b' formed by the second projecting members 3' are welded to each other to join the joined metal members 1 and the second projecting members 3'.

(8-3) Reset the project

In the re-installation process, as shown in FIG. 11, the first side surface C of the joined metal member 1 at the end of the welding process faces the upper side, and the metal member 1 to be joined when the protruding portion J1 faces the first metal member 1a. The restraint is again placed on the gantry such that the second protruding member 3' is located on the left side.

(9) Third preparatory work

The third preparatory work is provided with (9-1) a lower hole forming project, which is a lower hole formed at the start position of the friction stir before the third joining work.

(9-1) Lower hole formation project

The lower hole forming process, as shown in Fig. 11, is a process of forming the lower hole P3 at the start position S _M3 of the friction stir in the third joining work. In other words, the lower hole forming process is the same as the above-described lower hole forming process, and the lower hole P3 is formed in the predetermined insertion position of the stirring pin G2 of the joining rotary tool G. Thereby, the insertion resistance (pressing impedance) of the stirring pin G2 of the joining rotary tool G can be reduced. (9-1) The lower hole formation project is roughly the same as the (2-4) lower hole formation project of the first preparatory work, and detailed description thereof will be omitted.

(10) The third joint project

The third joining process is a process of joining the protruding portion J1 on the first side face C side of the joined metal member 1. In the third joining process of the present embodiment, as shown in FIG. 11 and FIG. 12, the stirring pin G2 of the joining rotary tool G is inserted (pressed in) by the joining rotary tool G. The lower hole P3 of the surface 32' of the two protruding members 3', the inserted stirring pin G2 moves to the end position E _M3 without departing from the drawing (refer to the traveling direction V ₃ ). That is, the start position S _M3 of the third joining work is located at the start position side of the first joining work (refer to the traveling direction V ₁ ).

When the joining rotary tool G moves, the metal around the stirring pin G2 is plastically fluidized in order, and at the position separated from the stirring pin G2, the plastic fluidized metal is hardened again to form a plasticized region (hereinafter referred to as "First side plasticized region W3") When the friction stir is performed to the end position E _M3 , as shown in Fig. 13, although the pull-out hole Q3 is formed on the surface of the first projecting member 2', in the present embodiment, Reserved.

Here, at the time point when the second joining process is completed, as shown in FIG. 9(b), the friction stirrer provided with the dummy joining rotary tool F is positioned above the first protruding material 2. Therefore, as shown in Fig. 12, when the start position of the third joining project is set above the second projecting member 3', the third joining work can be performed without moving the friction stirrer including the joining rotary tool G. , the job can be omitted. The detailed description of the third joining project is substantially the same as that of the first joining project and is omitted.

As shown in Fig. 13, when the third joining process is performed, a portion of the front side plasticized region W1 and the back side plasticized region W2 on the first side face C side overlaps with the first side face plasticized region W3. That is, by frictionally agitating a part of the surface side plasticized region W1 and the back side plasticized region W2, at least a part of the void defect R ₁ and the void defect R ₂ on the first side face C side is plasticized by the first side surface. The area W3 is disconnected. Thereby, the filling portions S ₁ and S ₂ are formed on the void defect R ₁ and the void defect R ₂ , respectively.

Further, in the present embodiment, the third preparatory work and the third preparatory work are performed before the third joining work, but the third preparatory work and the third preparatory work are omitted (except for the installation work). After the second joining project, the third joining project can be directly performed.

Further, before the third joining work, the first protruding material joining work, the false joining work, and the second protruding material work may be performed.

(11) Fourth preparation project

The fourth preparatory work is a work performed before the fourth joining work. In the present embodiment, the second side face D side of the joined metal member 1 is placed upward, and is again placed on a jig (not shown). engineering.

(11-1) Reset the project

In the re-installation process, after the restraint of the joined metal member 1 of the third joining process is released, the front and back of the joined metal member 1 are reversed, and the second side face D side is directed upward, and is again placed on the second side face D side. On the gantry of the friction stirrer (not shown). In the present embodiment, as shown in Fig. 12, the joined metal member 1 is half-rotated on the left and right axes to reverse the front and back of the joined metal member 1. As a result, as shown in Fig. 14, the upper surface of the joined metal member 1 becomes the second side surface D, and when the protruding portion J1 faces the second metal member 1b, the first protruding member 2' is located on the right side.

Further, by the friction stirrer, the front and back can be rotated without releasing the restraint of the joined metal member 1.

(12) Fourth preparatory work

The fourth preparatory work is a work performed before the fourth joint work, and on the second side D side, there is a (12-1) lower hole forming process for forming a lower hole at the start position of the fourth friction joining of the joint work. .

(12-1) Lower hole formation project

The lower hole forming process, as shown in Fig. 14(a), is a process of forming the lower hole P4 at the start position S _M4 of the friction stir in the fourth joining work. Thereby, the insertion resistance (pressing impedance) of the stirring pin G2 of the joining rotary tool G can be reduced.

Further, since the (12-1) lower hole forming process is substantially the same as the (2-4) lower hole forming work of the first preparatory work, a detailed description will be omitted.

(13) The fourth joint project

The fourth joining process is a process of joining the protruding portion J1 on the second side face D side of the joined metal member 1. In the fourth joining process of the present embodiment, the joining rotary tool G is used to perform friction stir from the second side face D side of the joined metal member 1.

In the fourth joining process, as shown in Fig. 14 (a), the stirring pin G2 of the joining rotary tool G is inserted (pressed in) at the start position S _{M4 of the} first projecting member 2', and the inserted stirring pin is inserted. G2 moves to the end position E _M4 without departing from the middle. In the second joining process, friction stir is started from the lower hole P4, and the operation is continued until the end position E _M4 . That is, the start position S _M4 of the fourth joining work is located on the side of the start position E _M1 of the second joining work (refer to the traveling direction V ₂ ). When the joint rotary tool G is moved, as shown in Fig. 14(b), the metal around the stirring pin G2 is plastically fluidized in sequence, and the plastic fluidized metal is again retracted from the position where the stirring pin G2 is detached. The plasticized region is formed by hardening (hereinafter referred to as "second side plasticized region W4").

At the time point when the third joining process is completed, as shown in Fig. 13, the friction stirrer having the dummy joining rotary tool F is positioned above the first projecting material 2'. Then, after the project is further set in (11-1), the friction stirrer is positioned directly above the first projecting member 2' by the left and right shafts. Therefore, when the start position of the third joining work is set above the first projecting material 2', the fourth joining work can be performed without moving the friction stirrer including the joining rotary tool G, and the work can be omitted.

As shown in Fig. 14(b), when the fourth bonding process is performed, a portion of the surface side plasticized region W1 and the back side plasticized region W2 on the second side face D side and the second side plasticized region are formed. W4 repeats. That is, the friction stir is again performed by a portion of the front side plasticized region W1 and the back side plasticized region W2, and at least a part of the void defect R ₁ and the void defect R ₂ on the second side face D side is the second side D side. The plasticized region W4 is broken. Thereby, filling portions S ₃ and S ₄ are formed on the void defect R ₁ and the void defect R ₂ , respectively.

Further, before the fourth joining work, the lower hole forming process (12-1) is omitted, and the third joining work may be directly performed after the third joining work. Further, before the fourth joining work, the first protruding material joining work, the false joining work, and the second protruding material joining work can be performed.

(14) Projection of protruding material

In the projecting of the projecting material, after the fourth joining process is completed, the first projecting member 2 and the second projecting member 3 are cut off from the joined metal member 1 (see Fig. 1). At this time, it is preferable to remove the burrs formed on the surface A and the inside B of the joined metal member 1.

According to the bonding method of the present embodiment described above, as shown in FIG. 1, as shown in FIG. 1, even if the first metal member 1a and the second metal member 1b have a large thickness, the first side surface and the second side surface are used. D is friction stir, and a continuous gap can be buried from the first side surface C to the second side surface D (refer to the gap 119 in Fig. 30).

In the case where the rotation direction and the traveling direction of the joining rotary tool G are set to the above state, the surface side plasticized region W1 and the back side plasticized region W2 are traversed from the first side surface C to the second side. The side surface D forms continuous void defects R ₁ and R ₂ , and the start position S of the fourth joining work is set by setting the start position S _M3 of the third joining work to the start position S _M1 side of the first joining work. _{M4 is} set to the start position S _M2 side of the second joining process, and friction stir is performed to form the filling portions S1 to S4 in which the void defects R ₁ and R ₂ are respectively broken.

In other words, in the present embodiment, the rotation direction of the joining rotary tool G is set to the right rotation, and the possibility that the void defect R is generated on the left side in the traveling direction of the front side plasticized region W1 and the back side plasticized region W2 becomes High, the right side of the direction of travel forms a plasticized region of higher density. With such a friction stir characteristic, as shown in FIGS. 1(a) and 1(b), when the possibility that the void defects R ₁ and R _{2 are} formed in the second metal member 1b is high, the third joint is used. The starting position of the joining rotary tool G of the fourth joining work and the joining process is set to the above-described state, whereby both ends of the cavity defects R ₁ and R ₂ can be disconnected from the plasticized region having a high density. Thereby, the joined metal member 1 having high watertightness and airtightness between the first side surface C and the second side surface D can be manufactured.

Here, when the joining rotary tool G crosses the protruding portions J1 and J2, the plasticized regions W1 to W4 may form an oxide film. For example, as shown in FIG. 7(b), when the joined metal member 1 is frictionally stirred toward the second protruding member 3, when the protruding portion J3 is cross-cut, the joined metal member 1 and the first protruding member are joined. The oxide film formed between the two is wound into the surface side plasticized region W1 side. When the joining rotary tool G is rotated to the right, the oxide film is likely to be formed on the right side in the traveling direction of the surface-side plasticized region W1, and if it is rotated to the left, it may be formed on the left side in the traveling direction of the surface-side plasticized region W1. High sex.

However, according to the present embodiment, since both ends of the plasticized regions W1 and W4 are repeated, the oxide film is broken, and a high-quality product can be produced.

Further, in the present embodiment, the second projecting material joining process, the false joining process, and the first projecting material joining work are performed, but the present invention is not limited thereto. For example, it is not necessary to carry out continuously, and each project can also perform friction stir intermittently. Further, in the present embodiment, the dummy joining process and the joining work are performed using a pair of protruding members, and friction stir may be performed without using the protruding members. Further, in the present embodiment, the first joining work is directly performed after the first preliminary work, and after the first preliminary work, after the second preliminary work, the first joining work and the second copy are continuously performed. Joining works are also possible.

As described above, in the present invention, when the outer periphery of the joined metal member 1 is joined by friction stir, the rotation direction and the traveling direction of the joining rotary tool G are set. In other words, when the friction stir is performed, the rotation direction and the traveling direction of the joining rotary tool G are set in consideration of a position where the possibility of occurrence of the void defect R is high. In the first embodiment, the case where all of the joining rotary tools G are rotated right is described. However, the present invention is not limited thereto, and various joints may be considered by the rotation direction and the traveling direction of the joining rotary tool G. Variety.

[Second embodiment]

For example, in the first embodiment, although the rotation direction of the joining rotary tool G is set to be all right rotation, it may be set to the left rotation as in the second embodiment.

As shown in Fig. 15, when the rotation direction of the joining rotary tool G is set to the left direction and the surface A of the joined metal member ₁ is subjected to the first joining process in the traveling direction V1, the second joining process is Friction stirring is performed from the end position side of the first joining work to the start position side (the direction V ₂ is performed). At this time, since the joining rotary tool G is rotated to the left, the possibility that the void defect R is formed on the right side in the traveling direction of the front side plasticized region W1 and the back side plasticized region W2 is high, and the left side formation density in the traveling direction is high. Plasticized area. That is, at this time, void defects R ₁ and R _{2 are} easily formed in the first metal member 1a.

Therefore, the third joining process performs friction stirring from the starting position side of the first joining process in the traveling direction V ₃ . Then, the fourth joining process performs friction stirring from the starting position side of the second joining process in the traveling direction V ₄ . According to the third joint work and the fourth joint work described above, the both ends of the void defects R ₁ and R ₂ are again subjected to friction stir, and the plasticized region having a high density is broken. Accordingly, by forming the filling portion S ₁ to S _4, air-tightness and water-tightness between the first side and the second side C D can be further improved.

That is, as shown in the first embodiment and the second embodiment, when the rotation direction of the joining rotary tool G is the same direction, the start position of the friction stir in the second joining process is set to be the first The end position of the friction stir in the joint work, and the start position of the friction stir in the third joint work is set to the start position side of the friction stir in the first joint work and the friction stir of the second joint work. One of the start position side, the start position of the friction stir in the fourth joining process is set to the start position side of the friction stir in the first joining work and the start side of the friction stir of the second joining work One of them.

[Third embodiment]

Further, for example, the joining method of the third embodiment shown in Fig. 16 is different from the first embodiment in that the rotation direction of the joining rotary tool G is different in the direction.

In the first bonding method, in the first bonding process, the rotation direction of the joining rotary tool G is set to the left rotation, and the first side surface C side is on the second side surface D side (refer to the traveling direction V ₁ ' ) Perform friction stir.

On the other hand, in the second joining process, the rotation direction of the joining rotary tool G is set to the right rotation, and the start position of the friction stirring is set to the start position side of the first joining work, from the first side C Friction stirring is performed to the second side face D (refer to the traveling direction V ₂ '). In this case the cavity formed on the surface side of the plasticized region W1 is formed on the defect wherein R ₁ and the rear side of the plasticized region W2 void defects readily R ₂ collectively formed on the first metal member 1a.

Therefore, when the third joining process sets the rotation direction of the joining rotary tool G to the left rotation, as shown in FIG. 16, the start position of the friction stir is set to the start position side of the first joining work, Friction stirring is performed from the surface side A to the back side B (refer to the traveling direction V ₃ '). On the other hand, in the fourth joining process, when the rotation direction of the joining rotary tool G is set to the right rotation, the start position of the friction stir is set to the end position of the first joining work, and the surface A side is Friction stir is performed on the B side (refer to the traveling direction V ₄ '). According to the third joint work and the fourth joint work described above, both ends of the void defects R ₁ and R ₂ are friction stir again, and are broken in the plasticized region having a high density. Accordingly, by forming the filling portion S ₁ to S _4, air-tightness and water-tightness of the first side surface side of the C and D of the second side surface can be further improved.

That is, as shown in Fig. 16, in the first joining process, the joining rotary tool G is rotated to the left so that the first metal member 1a is positioned to the right in the traveling direction of the joining rotary tool G, and the other In the second joining process, the joining rotary tool G is rotated rightward so that the first metal member 1a is positioned on the left side in the traveling direction of the joining rotary tool G, and the third joining project and the fourth copy are set. In the joining process, when the joining rotary tool G is rotated rightward, the joining rotary tool G is set such that the first metal member 1a is positioned on the right side in the traveling direction, and when the joining rotary tool G is rotated left, the joining rotation is set. Tool G, so that the first metal member 1a is located The left side of the traveling direction can improve the airtightness and watertightness of the first side surface C and the second side surface D side.

Further, although not specifically illustrated, in the first joining process, the joining rotary tool G is rotated rightward, and the first metal member 1a is set to the right side in the traveling direction of the joining rotary tool G, and the other In the second joining process, the joining rotary tool G is rotated to the left so that the first metal member 1a is positioned on the left side in the traveling direction of the joining rotary tool G, and the third joining project and the fourth copy are set. In the joining process, when the joining rotary tool G is rotated rightward, the joining rotary tool G is set such that the first metal member 1a is positioned on the left side in the traveling direction, and when the joining rotary tool G is rotated leftward, the joining rotation is set. The tool G is such that the first metal member 1a is located on the right side in the traveling direction, so that the airtightness and watertightness of the first side surface C and the second side surface D side can be further improved.

In other words, the cavity defects R ₁ and R ₂ formed in the surface side plasticized region W1 and the back side plasticized region W2 are easily formed collectively on the first metal member 1a, in the third bonding work and the fourth bonding work. Preferably, the rotation direction and the traveling direction of the joining rotary tool G are set such that the first metal member 1a side is frictionally agitated at a higher density than the second metal member 1b side.

On the other hand, in the case where the cavity defects R1 and R2 formed in the front side plasticized region W1 and the back side plasticized region W2 are formed in the second metal member 1b, in the third bonding work and the fourth bonding work, It is preferable to set the rotation direction and the traveling direction of the joining rotary tool G so that the second metal member 1b side is rubbed at a higher density than the first metal member 1a side. mix.

Further, the present invention is appropriately modified within the scope of the invention. For example, although the friction stirrer of the present embodiment performs friction stir from above the metal member to be joined, the present invention is not limited thereto, and the joining rotary tool may be frictionally stirred while moving around the joined metal member. Further, the first metal member 1a and the second metal member 1b may be hollow members.

Further, in the present embodiment, the side joining process for performing friction stir from the side surface of the joined metal member 1 is a third joining process in which friction stir is performed with respect to the first side face C of the joined metal member 1, and The fourth joining process of friction stir is performed on the second side face D, but friction stir may be performed on the side surface of either side.

[Fourth embodiment]

According to the bonding method of the fourth embodiment of the present invention, as shown in FIG. 17, the protruding portion J21 of the joined metal member 201 that causes the first metal member 201a and the second metal member 201b to protrude from the surface A and the inside B The first side surface C and the second side surface D are frictionally stirred, and the first metal member 201a and the second metal member 201b are provided with a main body portion and a thin portion which is thinner than the main body portion. Then, the extended distance of the plasticized region formed on the first side surface C and the second side surface D is larger than the thickness of the protruding portion J21 of the joined metal member 201.

As shown in Fig. 18, the first metal member 201a and the second metal member 201b are members having substantially the same shape, and have a body portion Q having a large thickness and a segment portion R having a small thickness at an end portion of the body portion Q. The first metal member 201a and the second metal member 201b are made of aluminum, aluminum alloy, copper, and copper. A friction stir metal material such as gold, titanium, titanium alloy, magnesium or magnesium alloy.

In the following description, the surface of the first metal member 201a is the surface 212a, the inner surface is the inner surface 213a, the side surface of one side is the side surface 214a, and the side surface of the other side is the side surface 215a. Further, the surface of the segment portion R is the segment surface 217a, the end surface of the segment portion R formed perpendicularly to the segment surface 217a is the segment end surface 218a, and the surface vertically erected from the segment surface 217a is the vertical surface 216a. The height of the segment end surface 218a is formed by p1, the width of the segment surface 217a is formed by p2, and the height of the vertical surface 216a is formed by p3.

On the other hand, the surface of the second metal member 201b is the surface 212b, the inner surface is the inner surface 213b, the side surface on the other side is the side surface 214b, and the other side surface is the side surface 215b. Further, the surface of the segment portion R is the segment surface 217b, the end surface of the segment portion R perpendicular to the segment surface 217b is the segment end surface 218b, and the surface formed perpendicularly from the segment surface 217b on the body Q side is the vertical surface. 216b. The height of the segment end surface 218b is formed by q1, the width of the segment surface 217b is formed by q2, and the height of the vertical surface 216b is formed by q3.

The lengths between the side faces of the first metal member 201a and the second metal member 201b are substantially equal, and the opposing segment portions R form p1≒q3, p2≒q2, and p3≒q1, respectively.

Next, the bonding method of the fourth embodiment will be described. The joining method of the fourth embodiment includes (1) preparation work, (2) first preliminary work, (3) first joint work, (4) second preparatory work, (5) second joint work, (6) a third preparatory project, (7) a third preparatory project, (8) a third joint project, (9) a fourth preparatory project, and (10) a fourth joint project. Moreover, the third joint work and the fourth joint work are called side joints. Cheng. Further, the description of the portions overlapping with the first embodiment will be omitted.

(1) Preparation project

In the preparation process, the first metal member 201a and the second metal member 201b are protruded to form a joint project of the joined metal member 201, and the first projecting member 202 and the second projecting member 203 are disposed on both sides of the joined metal member 201. The protruding material arrangement project, the first protruding material 202 and the second protruding material 203 and the joined metal member 201 are spliced by welding, and the joined metal member 201 is placed on a table of a friction stirrer (not shown). Set up the project.

The projecting process, as shown in Figs. 18(a) and 18(b), causes the vertical surface 216a, the segment surface 217a, and the segment end surface 218a of the first metal member 201a to be respectively opposite to the end surface of the second metal member 201b. 218b, the segment surface 217b and the vertical surface 216b face each other to cause the two to protrude. Further, the surface 212a of the first metal member 201a is flush with the surface 212b of the second metal member 201b, and the inner surface 213a of the first metal member 201a is flush with the surface 213b of the second metal member 201b. Further, the side surface 214a of one side of the first metal member 201a is flush with the side surface 214b of one side of the second metal member 201b, and the side surface 215a of the other side of the first metal member 201a is flush with the side surface 215b of the other side of the second metal member 201b. level. As shown in FIGS. 17 and 18, the projecting portion J21 is formed on the protruding surface of the first metal member 201a and the second metal member 201b by the projecting process.

Further, the surface of the joined metal member 201 is the front surface A, the inner surface is the inner surface B, the side surface on one side is the first side surface C, and the side surface on the other side is the second side surface D. Further, in the first side surface C and the second side surface D, a protrusion is formed The plane lines of the portion J21 are L1, L2, and L3. The planar line shape L2 is perpendicular to the plane line shape L1 and the plane line shape L3, respectively.

In the projecting material arrangement project, a pair of projecting members are disposed on both side faces of the joined metal member 201. As shown in FIGS. 19 and 20, the first projecting member 202 and the second projecting member 203 are members arranged to sandwich the protruding portion, and have sizes and shapes covering the first side face C and the second side face D, respectively. . Each of the first protruding material 202 and the second protruding material 203 has a size equal to the size of the metal member 201 to be joined, and the surface and the inside of the first protruding material 202 and the second protruding material 203 and the surface A of the joined metal member 201 And inside B flush. Although the material of the first projecting member 202 and the second projecting member 203 is not limited, in the present embodiment, a metal material having the same composition as that of the joined metal member 201 is formed.

In the welding process, as shown in Fig. 19, the joined metal members 201 are welded to the inner corner portions 202a, 202b formed by the first projecting members 202, and the joined metal members 201 are falsely joined to the first projecting members 202. Further, the joined metal member 201 is welded to the inner corner portions 203a and 203b formed by the second protruding member 203 to falsely engage the joined metal member 201 and the second protruding member 203. Further, the welding may be continuously performed across the entire length of the inner corner portions 202a, 202b and 203a, 203b, or the welding may be intermittently performed.

In the installation process, the joined metal member 201 in which the first projecting member 202 and the second projecting member 203 are falsely welded is placed on a gantry of a friction stirrer (not shown), and is restrained from moving by, for example, using a jig. The friction stirrer of the present embodiment is above the joined metal member 201 A device that is set by friction stir.

(2) First preparatory work

In the first preliminary work, the small joint rotating tool F is used for the false engagement on the protruding portion J21 appearing on the surface A of the joined metal member 201. The first preparatory work of the present embodiment includes a second projecting material joining process in which the joined metal member 201 is joined to the protruding portion J23 of the second protruding member 203, a joining process of joining the protruding portion J21 of the joined metal member 201, and a joined metal. The first projecting engagement work of the member 201 with the projecting portion J22 of the second projecting material 202 and the start of the friction stir in the first joining work form the lower hole forming process of the lower hole.

In the first preparatory work, as shown in Fig. 20, a dummy joining rotary tool is moved to form a continuously moving trajectory, and the splicing portions J23, J21, and J22 are continuously frictionally stirred. In other words, the stirring pin F2 (see FIG. 20) of the dummy joining rotary tool F inserted into the friction stirring start position S _P1 is moved to the end position E _P1 without departing from the middle. Further, in the present embodiment, the friction stir starting position S _P1 is provided on the second protruding member 203, and the friction stirring end position E _P1 is set on the first protruding member 202, and the starting position S _P1 and the ending position are set. E _P1 is not limited.

As shown in Fig. 20, the small rotary tool F is placed directly above the start position S _P1 at the appropriate position of the second projecting member 203, and then the small rotary tool F is lowered while rotating to press the stirring pin F2. At the starting position S _P1 . The entirety of the stirring pin F2 enters the second protruding member 203, and the entire surface of the lower end surface F11 of the shoulder portion F1 contacts the surface of the second protruding member 203, and then the small rotating tool F is rotated while being rotated toward the second protruding material. The starting point s3 is relatively moved. The small rotary tool F is continuously moved and frictionally stirred until the start point s3 of the second projecting engagement process, and then the small rotary tool s3 is moved to the second projecting engagement process at the starting point s3 without departing from the state.

In the second projecting material joining process, the second protruding member 203 and the protruding portion J23 of the joined metal member 201 are frictionally stirred. Specifically, a path of friction stir is set on the joint (boundary line) of the joined metal member 201 and the second protruding member 203, and the small rotary tool F is relatively moved along the path, and the friction stir is performed on the protruding portion J23. . Further, in the present embodiment, the small rotary tool F is continuously frictionally agitated from the starting point s3 to the end point e3 of the second projecting material joining process without departing from the middle.

Further, when the stirring pin F2 of the small rotary tool F enters the protruding portion J23, the force of the joined metal member 201 and the second protruding member 203 is pulled apart, due to the inner side formed by the joined metal member 201 and the second protruding member 203 The corner portions 203a and 203b (see FIG. 21) are welded and joined to each other to prevent an opening from being formed between the joined metal member 201 and the second protruding member 203.

After the small rotary tool F reaches the end point e3 of the second projecting engagement project, the friction stir is not ended at the end point e3, and the friction stir is continuously performed until the starting point s1 of the false engagement process, and the state is shifted to the false engagement process. That is, from the end point e3 of the second projecting material joining process to the starting point s1 of the dummy joining work, the small rotating tool F continues the friction stirring without being separated, and the small rotating tool F moves to the false joining process without departing from the starting point s1. Thus, at the end point e3 of the second projecting joint project, the small rotary tool F does not need to be detached, and at the starting point s1 of the false joint project, no small size is required. Since the insertion work of the rotary tool F is performed, the efficiency of the preliminary joining work can be improved and speeded up.

In the dummy joining process, the joint portion J21 of the joined metal member 201 is friction stir. Specifically, a path of friction stir is set on the joint (boundary line) of the joined metal member 201, and the small rotary tool F is relatively moved along the path, and the friction stir is continuously performed across the entire length of the protruding portion J21. . Further, in the present embodiment, the small rotary tool F is continuously frictionally agitated from the starting point s1 to the end point e1 of the false joining process without departing from the middle.

After the small rotary tool F reaches the end point e1 of the dummy jointing work, the friction stir is not ended at the end point e1, and the friction stir is continuously performed until the starting point s2 of the first projecting material joining process, and the state is transferred to the first projecting material joining work. That is, from the end point e1 of the dummy joining process to the first projecting material joining process s2, the small rotating tool F continues to perform friction stirring without being separated, and at the starting point s2, the small rotating tool F moves to the first protruding material without departing. engineering.

In the first projecting material joining process, the joined metal 201 and the protruding portion J22 of the first protruding member 202 are frictionally stirred. Specifically, the path of the friction stir is set on the joint (boundary line) of the joined metal member 201 and the first protruding member 202, along which the small rotary tool F is relatively moved, and the protruding portion J22 is rubbed. Stir. Further, in the present embodiment, the small rotary tool F is continuously frictionally agitated from the starting point s2 to the end point e2 of the first projecting material joining process without departing from the middle.

Also, when the stirring pin F2 of the small rotary tool F enters the protruding portion J22 When the force of the joined metal member 201 and the first protruding member 202 is pulled apart, the joined metal member 201 is welded to the inner corner portions 202a and 202b formed by the first protruding member 202 to be falsely joined, thereby preventing the being An opening is formed between the joint metal member 201 and the first protruding member 202.

After the small rotary tool F reaches the end point e2 of the first projecting material joining process, the friction stir is not completed at the end point e2, and the friction stirring is continuously performed until the end position E _P1 of the first projecting material 202 is set. Further, in the present embodiment, the end position E _P1 is provided on the extension line of the joint (boundary line) on the surface A side of the joined metal member 201. That is, the end position E _P1 is also the start position S _M1 of the friction stir in the first joining work to be described later.

After the small rotary tool F reaches the end position E _P1 , the small rotary tool F is raised while rotating, and the stirring pin F2 is disengaged from the end position E _P1 .

The lower hole forming process is a process of forming a lower hole at the start position of the friction stir of the first joining project (refer to Fig. 4(b)). In the lower hole forming process of the present embodiment, the lower hole (not shown) is formed on the S _M1 set on the surface of the first protruding material 202.

(3) The first joint project

The first joining process is a process of actually joining the projections J21 on the surface A side of the joined metal member 201. In the first joining process of the present embodiment, the large-sized rotary tool G is used to frictionally stir the protruding portion J21 in the state of the false joint from the surface A side of the joined metal member 201.

In the first joining process, as shown in Fig. 21, the stirring pin G2 of the large rotating tool G is inserted (pressed) into the lower hole P1 formed at the starting position S _M1 , and the inserted stirring pin G2 is not separated in the middle. Move to the end position E _M1 . That is, in the first joining process, the friction stir is started from the lower hole P1, and the friction stirring is continuously performed until the end position E _M1 .

Further, in the present embodiment, the start position S _{M1 of the} friction stir is provided on the first protrusion 202, and the end position E _M1 is provided on the second protrusion 203, but the position of the start position S _M1 and the end position E _M1 is set. There is no limit.

The first bonding work will be explained in more detail with reference to Fig. 21.

First, as shown in Fig. 21, the large rotary tool G is placed directly above the lower hole (starting position S _M1 ), and then the large rotary tool G is lowered while rotating rightward, and the tip end of the stirring pin G2 is inserted into the lower hole. After the entire stirring pin G2 enters the first protruding material 202 and the entire surface of the lower end surface G11 of the shoulder G1 contacts the surface of the first protruding material 202, the large rotating tool G is moved toward the joined metal member 201 while performing friction stirring. One end of the protruding portion J21 moves relative to each other, and crosses the protruding portion J22 to protrude into the protruding portion J21. When the large rotary tool G is moved, the metal around the stirring pin G2 is plastically fluidized in sequence, and at the position separated from the stirring pin G2, the plastic fluidized metal is hardened again to form a plasticized region (hereinafter referred to as It is "surface-side plasticized region W21").

At the protruding portion J21 of the joined metal member 201, the path of the friction stir is set to the joint set on the joined metal member 201 (on the moving trajectory in the dummy joining process), and the large rotating tool G is made along the path. Relatively moving, friction stir is continuously performed from one end to the other end of the protruding portion J21. The large rotary tool G is relatively moved, and the friction stir is applied to cross the protruding portion J23, and the state is moved toward the end position E _{M1 in} this state.

After the large rotary tool G reaches the end position E _M1 , the large rotary tool G is raised while rotating, and the stirring pin G2 is disengaged from the end position E _M1 .

(4) Second preparatory work

In the second preparatory work, the small-sized rotary tool F is used for the false engagement on the protruding portion J21 of the inner surface B of the joined metal member 201. The second preliminary work includes a first projecting engagement work in which the joined metal member 201 is joined to the first projecting member 202, a false joint work in which the joint portion J21 of the joined metal member 201 is joined, the joined metal member 201 and the second projecting member The second projecting material joining work of the joint portion J23 of 202, and the lower hole forming process of the lower hole are formed at the start position of the friction stir in the second joining work.

The second preparatory work is substantially the same as the first preparatory work except that it is performed on the inner side B of the joined metal member 201, and therefore the description thereof will be omitted.

(5) The second joint project

The second joining process is a process in which the joint portion J21 on the inner side B side of the joined metal member 201 is actually joined. In the second joining work of the present embodiment, the large-sized rotary tool G is used, and the protruding portion J21 in the false engagement state is frictionally stirred from the inner side B side of the joined metal member 201.

In the second joining work, as shown in Fig. 22, the stirring pin G2 of the large rotating tool G that is rotated right is inserted (pressed in) at the start position S _M2 , and the inserted stirring pin G2 is moved to the end position E without being detached in the middle. _M2 . In the second bonding process, the plasticized region W22 is formed on the inner surface B of the joined metal member 201. The second joining process is performed in the same manner as the first joining process described above except for the inner side B of the joined metal member 201, and detailed description thereof will be omitted.

Further, after the second joining process is completed, the first projecting member 202 and the second projecting member 203 are cut off from the joined metal member 201.

(6) Third preparation project

In the third embodiment, the first projecting member 204 and the second projecting member 205 are disposed on both sides of the protruding portion J21 of the joined metal member 201, and the first protruding member is welded by the first protruding member. The material 204 and the second projecting material 205 are falsely joined to the joining process of the joined metal member 201, and the joining metal member 201 is placed on a gantry of a friction stirrer (not shown).

In the projecting material arrangement, as shown in Fig. 23, a pair of projecting members are disposed on the surface A and the inner side B of the joined metal member 201. As shown in Fig. 23, the first projecting member 204 and the second projecting member 205 are members which are disposed to sandwich the projecting portion J21, and have a size and a shape which respectively cover the projecting portion J21 which is formed on the front surface A and the inner surface B. The surfaces and the inner surfaces of the first protruding member 204 and the second protruding member 205 are flush with the first side surface C and the second side surface D of the joined metal member 201, respectively. Although the material of the first projecting member 204 and the second projecting member 205 is not limited, in the present embodiment, a metal material having the same composition as that of the joined metal member 201 is formed.

In the welding process, the joined metal member 201 is welded to the inner corner portion formed by the first protruding member 204 and the second protruding member 205 to falsify the joined metal member 201 and the first protruding member 204 and the second protruding member 205. Engage.

In the setting process, the first protruding material 204 and the second protruding material 205 are The joined metal member 201 after the false welding is placed on a gantry of a friction stirrer (not shown), and is restrained from moving by, for example, using a jig.

(7) Third preparatory work

The first projecting material joining work including the joined metal member 201 and the protruding portion J24 of the first protruding material 204, the joining process of the joint portion J21 of the joined metal member 201, the joined metal member 201 and the second protruding member 205 The second projecting joint work of the joint portion J25 and the start position of the friction stir in the third joint work form the lower hole forming process of the lower hole.

In the first projecting material joining process, the first projecting member 204 and the joint portion J24 of the joined metal member 201 are frictionally stirred. Specifically, a path of friction stir is set on the joint (boundary line) of the joined metal member 201 and the first protruding member 204, and the small rotary tool F is relatively moved along the path, and friction stir is performed on the protruding portion J24. . Further, in the present embodiment, the small rotary tool F is continuously frictionally agitated from the starting point n1 to the end point n2 of the first projecting material joining process without departing from the middle.

After the small rotary tool F reaches the end point n2, when the small rotary tool F enters the first projecting material 204 side, the friction stir is performed until the base point n3 of the false joint work. After the small rotary tool F reaches the base point n3, the small rotary tool F performs the false engagement process without departing from the protruding portion J21. The protruding portion J21 of the present embodiment is composed of the planar linear shapes L1, L2, and L3, and the direction is changed by 90 degrees for each of the bending points C1 and C2, and the small rotary tool F is moved to perform friction stir.

After the small rotary tool F reaches the base point n6, the small rotary tool F enters the second protruding member 205 side without being disengaged, and moves to the starting point n7 of the second protruding material joining process. After the small rotary tool F reaches the starting point n7, friction stir is performed along the protruding portion J205 until the end point n8. After the small rotary tool F reaches n8, it enters the second projecting member 205 side, and at the end position E _P3, the small rotary tool F is disengaged. Further, the end position E _P3 becomes the start position S _M3 of the third joining work to be described later.

The lower hole forming process is a process of forming a lower hole at the beginning of the friction stir of the third joining work. In the lower hole forming process of the present embodiment, the lower hole is formed on the S _M3 set on the surface of the second protruding material 5. In the lower hole forming process, since it is substantially the same as the above-described form, detailed description is omitted.

(8) The third joint project

The third joining process is a process in which the joint portion J21 on the first side face C side of the joined metal member 201 is actually joined. In the third joining process of the present embodiment, the large-sized rotary tool G is used, and the protruding portion J21 in the false engagement state is frictionally stirred from the first side face C side of the joined metal member 201.

In the third joining work, as shown in Fig. 24, the stirring pin G2 of the large rotating tool G that is rotated left is inserted (pressed in) at the start position S _M3 , and the inserted stirring pin G2 is moved to the end position E without being detached halfway. _M3 . In the third joining process, the friction stir is started from the lower hole (the omitted pattern) set at the start position S _M3 of the second protrusion 5 until the end position E _M3 of the first protrusion 204 is set continuously. Friction stir.

Further, in the present embodiment, the start position S _M3 of the friction stir is provided in the second protrusion 205, and the end position E _M3 is provided in the first protrusion 204, and the positions of the start position S _M3 and the end position E _M3 are not provided. limited.

In the third joining work, as shown in Fig. 24, the large rotary tool G is placed directly above the start position S _M1 , and then the large rotary tool G is rotated to the right side and the front end of the stirring pin G2 is inserted into the lower hole ( The schema is omitted). After the entire stirring pin G2 enters the second protruding material 205 and the entire surface of the lower end surface G11 of the shoulder G1 contacts the surface of the second protruding material 205, the large rotating tool G is moved toward the joined metal member 201 while performing friction stirring. The base point n6 of the protrusion J21 is relatively moved and protrudes into the protrusion J21. When the large rotary tool G is moved, the metal around the stirring pin G2 is plastically fluidized in sequence, and at the position separated from the stirring pin G2, the plastic fluidized metal is hardened again to form a plasticized region (hereinafter referred to as It is "the surface side plasticized area W23".

The protruding portion J21 of the present embodiment is formed by the plane linear shapes L1, L2, and L3, and the direction is changed by 90 degrees at each of the meandering points C2 and C1, and the large rotating tool G is moved to perform friction stir. Then, after the large-sized rotary tool G reaches the end position E _M3 through the base point n3, the large-sized rotary tool G is disengaged at the end position E _M3 . According to the third joining process, the surface side plasticized region W21 and the back side plasticized region W22 (see FIG. 17) are overlapped with the first side plasticized region W3, and the entire length of the protruding portion J21 of the first side surface C is crossed. Perform friction stir.

(9) Fourth preparatory work

The fourth preparatory work, as shown in Fig. 25, is performed on the protruding portion J21 of the second side face D of the joined metal member 201 using the small rotary tool F. False joint. The fourth preliminary work includes a first projecting material joining work, a false joint work of joining the joint portion J21 of the joined metal member 201, and a second projecting material joining work of the joined metal member 201 and the protruding portion J25 of the second protruding member 205. And a lower hole forming process for forming a lower hole at the start position of the friction stir in the fourth joining work.

Further, the fourth preparatory work is substantially the same as the third preparatory work except that it is performed on the second side face D, and detailed description thereof will be omitted.

(10) The fourth joint project

The fourth joining process, as shown in Fig. 25, is a process in which the joint portion J21 on the second side face D side of the joined metal member 201 is actually joined. In the fourth joining process of the present embodiment, the large-sized rotary tool G is used, and the protruding portion J21 in the false engagement state is frictionally stirred from the second side face D side of the joined metal member 201.

In the fourth joining work, as shown in Fig. 25, the stirring pin G2 of the large rotating tool G that is rotated right is inserted (pressed in) at the start position S _M4 , and the inserted stirring pin G2 is moved to the end position E without being detached in the middle. _M4 . In the fourth joining process, the friction stir is started from the lower hole (the omitted pattern) set at the start position S _M4 of the second protruding member 205, and is along the protruding portion J21 until the end position E set to the first protruding member 204. Friction stirring was continuously performed until _M4 . According to the fourth bonding work, the second side surface plasticized region W24 is formed on the second side face D of the joined metal member 201. The fourth joining process is substantially the same as the third joining work except that it is performed on the second side face D, and detailed description thereof will be omitted. Further, after the fourth joining work is completed, the pair of protruding members are cut off from the joined metal member 201.

According to the bonding method of the present embodiment described above, as shown in FIGS. 24 and 25, the first side surface side plasticized region W23 and the second side surface plasticized region in the first side surface C and the second side surface D are formed. W24 is formed by plane linear shapes L1, L2, and L3. Thereby, since the sum of the extended distances of the planar linear shapes L1, L2, and L3 is larger than the length of the thickness 1h of the joined metal member 201, it is ensured that the friction stirrable region becomes long. Therefore, the stress acting on the joint portion of the joined metal member 201 is dispersed to improve the joint strength. Further, according to the third bonding process and the fourth bonding process, the front side plasticized region W21 and the back side plasticized region W22 are overlapped with the first side surface plasticized region W23 and the second side plasticized region W24. The entire length of the protruding portion J21 of the first side surface C and the second side surface D is rubbed and stirred. Thereby, the airtightness and watertightness of the joined metal member 201 can be improved.

Further, in the joining method of the present embodiment, since the protruding portion J21 is a combination of straight lines, the forming of the protruding surface is facilitated, and the work of friction stir can be easily performed. Further, in the present embodiment, at the bending point C1, the plane line shape L1 forms 90 degrees with the plane line shape L2, and at the bending point C2, the plane line shape L2 forms a 90 degree with the plane line shape L3. Therefore, at the time of the friction stir joining, the large-sized rotary tool G linearly moving along the plane of the protruding portion J21 stops when it reaches the bending points C1 and C2, and the bending points C1 and C2 are longer than the other portions. Friction stir. Thereby, at the bending points C1 and C2, by performing the friction stir for a long period of time, the processing can be performed without causing joint defects, and the airtightness and watertightness can be improved at the joint portion.

Further, in the fourth embodiment, in the first joining work and the second joining work, since the joining rotary tool G is rotated rightward, A void defect (not shown) is formed on the second metal member 201b side of the surface plasticized region W21 and the inner plasticized region W22. Here, in the third joining process, the joining rotary tool G is rotated to the left and moved from the inner side B to the surface A, whereby the second metal member 201b side is subjected to high-density friction stirring. Further, in the fourth joining process, the joining rotary tool G is rotated rightward and moved from the inner side B to the surface A, whereby the second metal member 201b side is subjected to high-density friction stirring. Thereby, the void defects which may be formed in the first bonding work and the second bonding work can be broken in the real place.

Further, by using the protruding material, the first joining work, the second joining work, the third joining work, and the fourth joining work can be performed accurately and quickly. Further, by the false engagement of the respective protruding members with the joined metal member 201, it is possible to prevent the occurrence of the opening when the first bonding work, the second joining work, the third joining work, and the fourth joining work are performed.

Further, in the present embodiment, the side joining process is performed on both the first side face C and the second side face D, and does not necessarily have to be performed on both sides, and may be performed at least on one side.

As described above, the present invention is not limited to the above embodiments, and the appropriate design can be modified without departing from the scope of the present invention.

For example, the protruding portion J21 of the first side surface C and the second side surface D is not limited to the planar shape of the fourth embodiment, and can be appropriately set. In other words, in the fourth embodiment, the protruding portion J21 formed by the combination of the three planar linear shapes L1, L2, and L3 and the two points C1 and C2, the extended linear length of the protruding portion J21 is formed to be larger than that of the joined metal member 201. Thickness 1h is still large, sudden The shape of the portion J21 is not limited to the above embodiment, and can be appropriately set.

Fig. 26 is a plan view showing a first side face C of a modification of the embodiment of the present invention, wherein (a) is a first modification, (b) is a second modification, and (c) is a third modification.

For example, as shown in Fig. 26(a), the protruding portion J22 is disposed to be inclined with respect to the thickness direction of the joined metal member 201', whereby the protruding portion J22 can be formed without providing the bending point, and the protruding portion J22 can be formed. The extension distance of the plane line shape L of the thickness 1h of the joined metal member 201 is also large. According to the above-described protruding portion J22, since the extended distance of the planar linear shape L for friction stir is longer than the thickness 1h of the joined metal member 201, the distance of the friction stir can be ensured to be long, and the joint strength can be made high.

Further, as the projections J23 and J24 shown in Fig. 26(b) or 26(c), a combination of two planar linear shapes L1 and L2 and a bending point C1 may be used. According to such a configuration, since the large-sized rotary tool G stops as soon as it reaches the bending point C1, the friction stir can be performed in the same manner as the above-described embodiment. Further, in this case, the angle of the inner angle of the bending point C1 is not limited, and may be appropriately set.

Figure 27 is a plan view showing a first side face C of a modification of the embodiment of the present invention. (a) is a fourth modification, (b) is a fifth modification, (c) is a sixth modification, and (d) is a seventh modification.

In the fourth embodiment, although the bending points C1 and C2 are provided at two positions where the plane linear shapes L1, L2 or the plane linear lines L2 and L3 intersect at right angles, the angles of the bending points C1 and C2 are not limited. For example, as in 27 (a), As shown in the projections J25 and J26 shown in Fig. 27(b), the angles of the plane lines L1 and L2 or the plane lines L2 and L3 at the two bending points C1' and C2' intersect at an angle of 120 degrees. Effect.

Further, the number of the flat line-shaped bent points of the protruding portion may be formed at two or more positions, and may be appropriately set. For example, as the projection portion J27 shown in Fig. 27(c) and the projection portion J28 shown in Fig. 27(d), the number of the bending points may be four or six. In this way, the number of the bending points is increased, the moving speed of the large rotating tool G is slowed, or the movement of the large rotating tool G is stopped a plurality of times, and the joining of the joined metal members 201' is performed more reliably, and the joining can be performed. Bonding with excellent strength, air tightness and water tightness.

Fig. 28 is a plan view showing a first side face C of a modification of the embodiment of the present invention, and is an eighth modification.

In the fourth embodiment, the protruding portion J21 is formed by a combination of three planar linear shapes L1, L2, and L3. As shown in the protruding portion J8 shown in Fig. 28, the planar shape of the protruding portion J8 is curved. By forming this shape by the protruding portion J8, the extended length of the planar line shape can be made longer than the thickness 1h of the joined metal member 201. Further, when the planar shape of the protruding portion is curved, the curved line shape formed is not limited to the curved linear shape of the protruding portion J28 shown in Fig. 28.

Further, in the friction stir of the present embodiment, the first projecting material and the second projecting member may be disposed as needed or may be omitted. Moreover, the method of fixing the metal member during friction stir is not limited, and an appropriate known means can be selected. Further, in the present embodiment, although the side joining process is continuously performed by friction stir, the plasticized zone formed by the side joining process is formed. The extended distance of the domain is larger than the thickness of the metal to be joined, and the intermittent length can be performed intermittently.

1‧‧‧Connected metal components

1a‧‧‧First metal component

1b‧‧‧Second metal component

2‧‧‧First protruding material

3‧‧‧Second protruding material

201‧‧‧Connected metal components

201a‧‧‧First metal component

201b‧‧‧Second metal component

202‧‧‧First protruding material

203‧‧‧Second protruding material

A‧‧‧ surface

B‧‧‧ inside

C‧‧‧ first side

D‧‧‧ second side

F‧‧‧Fake joint rotation tool

G‧‧‧This joint rotation tool

J‧‧‧Blind

L‧‧‧ planar line shape

P1‧‧‧ lower hole

W‧‧‧Plasticized area

S _M ‧‧‧The starting position of the joint project

E _M ‧‧‧End of the joint project

V ₁ ~V ₄ ‧‧‧Rolling direction of the rotary tool

Fig. 1 is a view showing a joining method of the first embodiment, wherein (a) is a perspective view, and (b) is an enlarged perspective view of the N portion in (a).

Fig. 2 is a view showing a first preparatory work of the first embodiment, (a) being a perspective view, and (b) being a plan view.

Fig. 3 is a view showing a first preparatory work of the first embodiment, (a) is a cross-sectional view taken along line II of Fig. 2(b), and (b) is a cross-sectional view taken along line II-II of (b) of Fig. 2; .

Fig. 4 is a view showing the rotary tool of the first embodiment, and Fig. 4(a) is a side view of the rotary joining tool. (b) A side view of the joining rotary tool.

Fig. 5 is a view showing a use state of the dummy joining rotary tool of the first embodiment, wherein (a) is a view in which the dummy joining rotary tool abuts against the second protruding member, and (b) is a dummy joining rotary tool pressing. A picture of the second protrusion.

Fig. 6 is a plan view showing the second projecting material joining work, the false joint work, and the first projecting material joining work of the first preparatory work of the first embodiment.

Figure 7 is a cross-sectional view of the first embodiment of the first embodiment taken along the line III-III of Figure 6, (a) showing the friction stir at the starting position, and (b) showing the friction stir at the intermediate position, (c) ) indicates friction stir at the end position.

Fig. 8(a) is a cross-sectional view from the protruding portion J1 toward the first metal member 1a side after the re-installation of the second preparatory work of the first embodiment. Fig. 8(b) is a plan view showing the first projecting material joining work, the false joint work, and the second projecting material joining work of the second preparatory work of the first embodiment.

Fig. 9 is a cross-sectional view taken along line IV-IV of Fig. 8(b) of the second bonding work of the first embodiment, wherein (a) shows the friction stir at the starting position, and (b) shows the friction stir at the intermediate position.

Fig. 10 is a perspective view of the joined metal member after the protrusion cutting work of the first embodiment.

Figure 11 is a perspective view of a third preparatory work of the first embodiment.

Fig. 12 is a perspective view showing a third joining work of the first embodiment.

Figure 13 is a cross-sectional view taken along line V-V of Figure 12 after the third bonding work of the first embodiment.

Fig. 14(a) is a cross-sectional view of the second metal member 1b side from the protruding portion J1 after the re-installation of the fourth preparatory work of the first embodiment, and Fig. 14(b) is the first embodiment. The drawing of the fourth joining process is a cross-sectional view from the protruding portion J1 to the side of the second metal member 1b.

Fig. 15 is a view showing a joining method of the second embodiment, (a) a perspective view, and (b) is an enlarged perspective view of the H portion.

Fig. 16 is a view showing a joining method of a third embodiment, (a) a perspective view, and (b) is an enlarged perspective view of one portion.

Fig. 17 is a perspective view of the joined metal member of the fourth embodiment.

Fig. 18 is a view showing the joined metal member of the fourth embodiment, (a) is an exploded perspective view, and (b) is a side view.

Fig. 19 is a perspective view showing the projecting configuration of the projecting material of the fourth embodiment.

Figure 20 is a plan view showing a pseudo joint project of the fourth embodiment.

Fig. 21 is a plan view showing the first joining work of the fourth embodiment.

Fig. 22 is a plan view showing the second dummy joining work and the second joining work of the fourth embodiment.

Figure 23 is a plan view showing a third preparatory work of the fourth embodiment.

Figure 24 is a plan view showing a third bonding work of the fourth embodiment.

Fig. 25 is a plan view showing the fourth preparatory work and the fourth joining work of the fourth embodiment.

Fig. 26 is a plan view showing a first side face C of the joined metal member according to a modification of the embodiment of the present invention, wherein (a) is a first modification, (b) is a second modification, and (c) is a third. Modification.

Figure 27 is a plan view showing a first side face C of a member to be joined according to a modification of the embodiment of the present invention, wherein (a) is a fourth modification, (b) is a fifth modification, and (c) is In the sixth modification, (d) is the seventh modification.

Fig. 28 is a plan view showing a first side face C of the joined metal member according to a modification of the embodiment of the present invention, showing an eighth modification.

Figure 29 is a perspective view of a conventional joining method.

Figure 30 is a perspective view of a conventional joining method.

1‧‧‧Connected metal components

1a‧‧‧First metal component

1b‧‧‧Second metal component

12a‧‧‧ Surface of the first metal component 1a

12b‧‧‧ Surface of the second metal component 1b

13a‧‧‧The inside of the first metal component 1a

13b‧‧‧The inside of the second metal component 1b

14a‧‧‧ first side of the first metal component 1a

14b‧‧‧ first side of the second metal component 1b

15a‧‧‧Second side of the first metal component 1a

15b‧‧‧Second side of the second metal component 1b

A‧‧‧ surface

B‧‧‧ inside

C‧‧‧ first side

D‧‧‧ second side

G‧‧‧This joint rotation tool

J1‧‧‧ 突部

R ₁ , R ₂ ‧‧‧ void defects

S ₁ , S ₂ , S ₃ , S ₄ ‧‧‧ filling

V ₁ , V ₂ , V ₃ , V ₄ ‧‧‧Rolling direction of the rotary tool

W1‧‧‧Surface side plasticized area

W2‧‧‧ plasticized area inside

W3‧‧‧ first side plasticized area

W4‧‧‧Second side plasticized area

Claims (9)

A joining method of moving a rotary tool to perform friction stiring with respect to a joined metal member that is protruded from a first metal member and a second metal member, comprising: a first bonding process, with respect to the first metal member and the second The protruding portion of the metal member is frictionally stirred from the surface side of the joined metal member; the second joining process is performed by friction stir from the back side of the joined metal member with respect to the protruding portion; Friction stir welding from the side surface side of the joined metal member to the protruding portion; before the at least one of the first joining work, the second joining work, and the side joining work, a pair of protruding materials are disposed on both sides of the protruding portion, and the protruding portion and the inner corner portion formed by the joined metal member are welded to each other; wherein the first bonding work and the second bonding work are formed. The plasticized region is overlapped with the plasticized region formed by the above-described side joining process. The joining method according to claim 1, wherein the false joint of the false joint of the protruding portion is performed before performing at least one of the first joining work, the second joining work, and the side work engineering. The joining method described in claim 2, in the above In the present joining process, the piercing hole formed when the dummy joining rotary tool used in the above-described false joining process is detached is used as it is, or is expanded by using a drill, and is used as a stirring pin for the joining rotary tool. Lower point. The joining method of claim 1, wherein the predetermined lower hole is formed at a predetermined insertion position of the rotary tool. The joining method according to the first aspect of the invention, wherein the length of the plasticized region formed by the side joining work is larger than the thickness of the protruding portion. The joining method according to claim 5, wherein the side joining work is performed by frictionally agitating across the entire length of the protruding portion of the side surface of the joined metal member, and the joining work is performed on the side surface The formed plasticized region is overlapped with the plasticized region formed in the first bonding process and the second bonding process described above. The joining method according to claim 5, wherein the planar shape of the protruding portion appearing on the side surface of the joined metal member is a combination of a straight line or a straight line. The joining method according to claim 5, wherein one or more bending points are provided in a planar shape of the protruding portion appearing on a side surface of the joined metal member. The joining method according to claim 8, wherein the straight lines constituting the above-mentioned bending points intersect each other at an angle of 90 degrees.