JP7163867B2 - Hollow container manufacturing method - Google Patents

Description

The present invention relates to a method for manufacturing hollow containers.

For example, Patent Literature 1 discloses an invention in which a pair of plate-like metal members are friction stir welded using a rotating tool. In the invention, an auxiliary member softer than the metal member is interposed between a pair of metal members, and a rotary tool is inserted into the auxiliary member to perform friction stir. When metal members having high hardness are friction stir welded together, there is a problem that the rotary tool is severely damaged and the tool cost increases. However, according to the invention, since friction stir is performed by inserting a rotating tool into a soft auxiliary member, it is possible to suitably join metal members with high hardness.

JP-A-2007-83242

In the conventional joining method, since the stirring pin of the rotating tool has a cylindrical shape, there is a problem that it is difficult to insert it into the auxiliary member. Moreover, since the friction stir is performed while the shoulder portion of the rotary tool is in contact with the metal member, there is a problem that the load acting on the friction stir device increases.

From such a point of view, an object of the present invention is to provide a method for manufacturing a hollow container using a joining method capable of suitably joining metal members having high hardness.

In order to solve the above-mentioned problems, the present invention provides a manufacturing method for manufacturing a hollow container using a rotary tool equipped with a tapered stirring pin, comprising a recess having a bottom and a peripheral wall rising from the peripheral edge of the bottom. a preparation step of preparing a first metal member, a plate-shaped second metal member, and a frame-shaped auxiliary member; facing each other, the auxiliary member is sandwiched between the end surface and the peripheral edge portion, and the end surface of the peripheral wall portion of the first metal member and one side surface of the auxiliary member are butted against each other to form a first abutment portion and a butting step of forming a second butting portion by abutting the peripheral edge portion of the back surface of the second metal member and the other side surface of the auxiliary member, and rotating the rotating tool only from the surface of the auxiliary member While inserting, while only the stirring pin is in contact with the auxiliary member, the outer peripheral surface of the stirring pin is slightly in contact with the first metal member and the second metal member. a joining step of relatively moving the rotating tool along the second butting portion to join the first metal member and the second metal member via an auxiliary member, wherein the first metal member and the The second metal member and the auxiliary member are made of aluminum or an aluminum alloy, the first metal member and the second metal member have higher hardness than the auxiliary member, and the end surface of the peripheral wall portion of the first metal member and the At least one of the peripheral edge portions of the back surface of the second metal member has an outwardly inclined surface, and the auxiliary member has an inclined surface that tapers from the surface side toward the back surface on at least one side surface. characterized by comprising

Further, the present invention is a manufacturing method for manufacturing a hollow container using a rotary tool having a tapered stirring pin, wherein the first metal member has a concave portion having a bottom portion and a peripheral wall portion rising from the peripheral edge portion of the bottom portion. a preparation step of preparing a plate-shaped second metal member and a frame-shaped auxiliary member; The auxiliary member is sandwiched between the end surface and the peripheral edge portion, and the end surface of the peripheral wall portion of the first metal member and one side surface of the auxiliary member are butted to form a first abutting portion, a butting step of forming a second butted portion by butting the peripheral edge portion of the back surface of the second metal member and the other side surface of the auxiliary member; inserting the rotating tool only from the surface of the auxiliary member; While only the stirring pin is in contact with the auxiliary member, the outer peripheral surface of the stirring pin is slightly in contact with the first metal member and the second metal member, and the first butt portion and the second butt portion a joining step of joining the first metal member and the second metal member via an auxiliary member by relatively moving the rotating tool along the first metal member, the second metal member, and The auxiliary member is made of aluminum or an aluminum alloy, the first metal member and the second metal member have higher hardness than the auxiliary member, and the end surface of the peripheral wall portion of the first metal member and the second metal member is provided with a slanted surface sloping outward, and the auxiliary member is provided with slanted surfaces that taper off from the surface side toward the back side on both side surfaces.

Further, the present invention is a manufacturing method for manufacturing a hollow container using a rotary tool having a tapered stirring pin, wherein the first metal member has a concave portion having a bottom portion and a peripheral wall portion rising from the peripheral edge portion of the bottom portion. a preparation step of preparing a plate-shaped second metal member and a frame-shaped auxiliary member; The auxiliary member is sandwiched between the end surface and the peripheral edge portion, and the end surface of the peripheral wall portion of the first metal member and one side surface of the auxiliary member are butted to form a first abutting portion, a butting step of forming a second butted portion by butting the peripheral edge portion of the back surface of the second metal member and the other side surface of the auxiliary member; inserting the rotating tool only from the surface of the auxiliary member; While only the stirring pin is in contact with the auxiliary member, the outer peripheral surface of the stirring pin is slightly in contact with the first metal member and the second metal member, and the first butt portion and the second butt portion a joining step of joining the first metal member and the second metal member via an auxiliary member by relatively moving the rotating tool along the first metal member, the second metal member, and The auxiliary member is made of aluminum or an aluminum alloy, the first metal member and the second metal member have higher hardness than the auxiliary member, and the end surface of the peripheral wall portion of the first metal member and the second metal member At least one of the peripheral edge portions of the back surface of the auxiliary member has an outwardly inclined surface, and the auxiliary member has at least one side surface with an inclined surface that tapers from the front surface side to the back surface side, and the back surface It is characterized by having a projecting part that spreads toward at least one side surface on the side.

Further, the present invention is a manufacturing method for manufacturing a hollow container using a rotary tool having a tapered stirring pin, wherein the first metal member has a concave portion having a bottom portion and a peripheral wall portion rising from the peripheral edge portion of the bottom portion. a preparation step of preparing a plate-shaped second metal member and a frame-shaped auxiliary member; The auxiliary member is sandwiched between the end surface and the peripheral edge portion, and the end surface of the peripheral wall portion of the first metal member and one side surface of the auxiliary member are butted to form a first abutting portion, a butting step of forming a second butted portion by butting the peripheral edge portion of the back surface of the second metal member and the other side surface of the auxiliary member; inserting the rotating tool only from the surface of the auxiliary member; While only the stirring pin is in contact with the auxiliary member, the outer peripheral surface of the stirring pin is slightly in contact with the first metal member and the second metal member, and the first butt portion and the second butt portion a joining step of joining the first metal member and the second metal member via an auxiliary member by relatively moving the rotating tool along the first metal member, the second metal member, and The auxiliary member is made of aluminum or an aluminum alloy, the first metal member and the second metal member have higher hardness than the auxiliary member, and the end surface of the peripheral wall portion of the first metal member and the second metal member The peripheral portion of the back surface of the auxiliary member has an outwardly inclined surface, and the auxiliary member has both side surfaces with inclined surfaces that taper from the front surface side to the back surface side, and at least one of the It is characterized by having a protrusion that spreads toward the side surface.

According to the manufacturing method of such a hollow container, since the rotary tool having the tapered stirring pin is used, it can be easily inserted into the auxiliary member. Moreover, since only the stirring pin is inserted into the auxiliary member, the load acting on the friction stirrer can be reduced. Moreover, since the rotary tool is inserted into the auxiliary member which is softer than the first metal member and the second metal member, the service life of the rotary tool can be extended. Also, the bonding strength can be increased by slightly contacting the stirring pin with the first metal member and the second metal member.

Further, in the case where the back side of the auxiliary member is provided with a protruding portion that spreads toward at least one side surface side, the auxiliary member can be prevented from being lifted up when friction stir welding is performed. As a result, it is possible to prevent the positional deviation of the auxiliary member with respect to the first metal member and the second metal member, so that the friction stir welding can be performed more preferably.

Also, in the joining step, it is preferable to rotate the rotary tool around the first metal member and the second metal member. With this configuration, the airtightness of the hollow container can be improved.

Further, when the first metal member and the second metal member are cast materials and the auxiliary member is a wrought material, the cast materials can be suitably joined.

According to the method for manufacturing a hollow container according to the present invention, a hollow container can be formed by suitably joining metal members with high hardness.

FIG. 4 is a perspective view showing a preparatory step of the hollow container manufacturing method according to the first embodiment of the present invention; FIG. 4 is a perspective view showing the auxiliary member before processing according to the first embodiment; FIG. 4 is a cross-sectional view showing a butting step in the hollow container manufacturing method according to the first embodiment; FIG. 4 is a cross-sectional view showing a joining step in the hollow container manufacturing method according to the first embodiment. FIG. 4 is a perspective view showing a joining step in the hollow container manufacturing method according to the first embodiment. FIG. 4 is a cross-sectional view showing a butting step in the hollow container manufacturing method according to the second embodiment of the present invention; FIG. 10 is a cross-sectional view showing a butting step in the hollow container manufacturing method according to the third embodiment of the present invention; FIG. 10 is a cross-sectional view showing a joining step in the hollow container manufacturing method according to the third embodiment; FIG. 11 is a perspective view showing a preparatory step of a hollow container manufacturing method according to a fourth embodiment of the present invention; FIG. 11 is a cross-sectional view showing a joining step in a method for manufacturing a hollow container according to the fourth embodiment; FIG. 11 is a perspective view showing a joining step in a method for manufacturing a hollow container according to the fourth embodiment;

[First embodiment]
A first embodiment of the present invention will be described with reference to the drawings as appropriate. The hollow container manufacturing method according to the first embodiment includes a preparation step, a butting step, and a joining step. As shown in FIG. 5, in this embodiment, the first metal member 1 and the second metal member 20 are friction stir welded to manufacture the hollow container 300 .
The "outer surface" in the following description refers to the surface opposite to the "inner surface". Further, the "outer peripheral surface" in the following description refers to the surface opposite to the "inner peripheral surface". Also, the "front surface" in the following description refers to the surface opposite to the "back surface".

As shown in FIG. 1, the preparation step is a step of preparing the first metal member 1, the second metal member 20 and the auxiliary member 30. As shown in FIG.
The first metal member 1 and the second metal member 20 are rectangular metal members. The first metal member 1 and the second metal member 20 are not particularly limited as long as they are metals that can be friction-stirred. For example, aluminum or an aluminum alloy is used. In this embodiment, the first metal member 1 and the second metal member 20 are made of an aluminum alloy cast material such as JISH5302 ADC12 (Al-Si-Cu system).

In the central portion of the inner surface 1c of the first metal member 1, there is formed a recess 1f having a rectangular bottom 1d and a rectangular cylindrical peripheral wall 1e rising from the peripheral edge of the bottom 1d.

The second metal member 20 has a rectangular plate shape. A peripheral edge portion 20d of the back surface 20b of the second metal member 20 is inclined so as to become thinner toward the outer peripheral surface 20c. The inclined surface of the peripheral portion 20d is formed over the entire circumference.

As shown in FIG. 3, in the first metal member 1, the end surface 1a of the peripheral wall portion 1e is inclined in a direction away from the second metal member 20 toward the outer peripheral surface 1g. In other words, the end surface 1a of the first metal member 1 and the peripheral edge portion 20d of the second metal member 20 are inclined so as to separate from each other from the inner peripheral surface 1h toward the outer peripheral surface 1g. The inclination angles of the end surface 1a and the peripheral edge portion 20d are the same with respect to a virtual orthogonal plane orthogonal to the outer peripheral surface 1g of the peripheral wall portion 1e.

As shown in FIG. 1 , the auxiliary member 30 is a quadrangular frame-shaped member interposed between the first metal member 1 and the second metal member 20 . The auxiliary member 30 is made of a metal having a hardness lower than that of the first metal member 1 . The auxiliary member 30 is made of, for example, an aluminum alloy wrought material such as JIS A1050, A1100, A6063.

As shown in FIG. 2, the auxiliary member 30 is formed from an elongated member 15 which is an extruded member having a substantially trapezoidal cross section. Four cutouts 15a are formed at intervals in the longitudinal direction on the surface of the elongated member 15 that serves as the inner peripheral side of the auxiliary member 30 (see FIG. 3). By bending the elongated member 15 at right angles at each notch 15a and by abutting both ends of the elongated member 15, a rectangular frame-shaped auxiliary member 30 is formed as shown in FIG. . The frame-shaped auxiliary member 30 may be formed by die casting, for example.

As shown in FIG. 3 , the auxiliary member 30 includes a body portion 31 having a trapezoidal cross section and projections 32 protruding inward from an inner peripheral surface (back surface) 30 d of the body portion 31 .
The body portion 31 includes an outer peripheral surface (surface) 30a, side surfaces 30b and 30c, and an inner peripheral surface 30d. The side surfaces 30b and 30c are inclined surfaces that approach each other as they separate from the outer peripheral surface 30a (toward the inner peripheral surface 30d). That is, the side surfaces 30b and 30c of the auxiliary member 30 are inclined surfaces that taper from the outer peripheral surface 30a toward the inner peripheral surface 30d. The inclination angles of the side surfaces 30b and 30c are the same as the inclination angles of the end surface 1a and the peripheral edge portion 20d, which face each other.
The projecting portion 32 has a rectangular cross-sectional shape that is wider than the inner peripheral surface (rear surface) 30 d of the main body portion 31 . The projecting portion 32 is formed in a constant shape in the circumferential direction of the auxiliary member 30 .

The butting step is, as shown in FIG. 3, a step of butting the first metal member 1, the second metal member 20 and the auxiliary member 30 together. In the butting step, the end surface 1a of the first metal member 1 and the peripheral edge portion 20d of the second metal member 20 are arranged to face each other. Further, the auxiliary member 30 is sandwiched between the end surface 1a and the peripheral edge portion 20d.
The end surface 1a of the first metal member 1 and the side surface 30b of the auxiliary member 30 are butted together so as to be in general surface contact to form a butt portion J11. The peripheral edge portion 20d of the second metal member 20 and the side surface 30c of the auxiliary member 30 are butted together to form a butting portion J12 so as to be in general surface contact. An outer peripheral surface (surface) 30 a of the auxiliary member 30 is flush with the outer peripheral surface 1 g of the first metal member 1 and the outer peripheral surface 20 c of the second metal member 20 . An inner peripheral surface 30 d of the auxiliary member 30 is flush with the inner peripheral surface 1 h of the first metal member 1 . Moreover, the protrusion 32 is engaged with the inner peripheral surface 1 h of the first metal member 1 .

Here, as shown in FIG. 4, the rotary tool F is composed of a base portion F1 and a stirring pin F2. The rotary tool F is made of tool steel, for example. The base F1 is a part connected to the rotating shaft of the friction stirrer. Stirring pin F2 depends from base F1 and is tapered. A flat surface F3 perpendicular to the central axis of rotation is formed at the tip of the stirring pin F2. The flat surface F3 is slightly larger than the inner peripheral surface 30d of the auxiliary member 30. As shown in FIG.

The taper angle of the outer peripheral surface of the stirring pin F2 is the same as the inclination angles of the end surface 1a of the first metal member 1 and the peripheral edge portion 20d of the second metal member 20. As shown in FIG. That is, the cross-sectional shape of the stirring pin F2 viewed from the side is substantially the same as the cross-sectional shape of the main body portion 31 of the auxiliary member 30 .

A spiral groove is engraved on the outer peripheral surface of the stirring pin F2. In this embodiment, since the rotary tool F is rotated rightward, the spiral groove is formed counterclockwise as it goes from the base end side to the tip end side. When the rotating tool F is rotated counterclockwise, the spiral groove is formed clockwise as it goes from the base end side to the tip end side. In this way, the plastically fluidized metal is guided by the spiral grooves and moves toward the tip side, so that the generation of burrs can be suppressed. The rotary tool F can be used, for example, by attaching it to an arm robot having rotary drive means at its tip.

The joining step is a step of friction stir joining the first metal member 1 and the second metal member 20 using a rotary tool F, as shown in FIG. In the joining step, the stirring pin F2 of the rotating tool F rotated to the right is inserted into the center of the outer peripheral surface (surface) 30a of the auxiliary member 30 in the width direction.
In the joining step, the outer peripheral surface of the stirring pin F2 does not need to be brought into contact with the end surface 1a of the first metal member 1 and the peripheral edge portion 20d of the second metal member 20, but in this embodiment, the outer peripheral surface of the stirring pin F2 is in contact with the end surface. It is relatively moved along the auxiliary member 30 while being slightly in contact with 1a and the peripheral edge portion 20d. A contact margin between the outer peripheral surface of the stirring pin F2 and the end surface 1a and the peripheral edge portion 20d may be appropriately set to, for example, less than 1.0 mm.

In the joining step, only the stirring pin F2 is brought into contact with the first metal member 1, the second metal member 20 and the auxiliary member 30, and the base end side of the stirring pin F2 is exposed from the first metal member 1 and the second metal member 20. Friction stir is performed in this state. The flat surface F3 of the stirring pin F2 is inserted to a deep position within a range that does not protrude from the inner peripheral surface 1h of the first metal member 1. As shown in FIG.

As shown in FIG. 5, the rotating tool F is relatively moved along the auxiliary member 30, and the rotating tool F is caused to go around the peripheral wall portion 1e of the first metal member 1 and the outer peripheral surface 20c of the second metal member 20, and the starting end and overlap the end. When the end position is reached, the rotary tool F is separated from the auxiliary member 30. - 特許庁As described above, the butted portions J11 and J12 are simultaneously friction stir welded in one step. A plasticized region W is formed in the movement trajectory of the rotating tool F. As shown in FIG.
By friction stir welding the peripheral wall portion 1e of the first metal member 1 and the second metal member 20, a hollow container 300 having an internal space formed by the recess 1f is formed.

According to the manufacturing method of the hollow container 300 according to the present embodiment described above, as shown in FIG. can be easily inserted into the Further, since only the stirring pin F2 is inserted into the auxiliary member 30 and the base end side of the stirring pin F2 is exposed, friction stirring is performed, so that the load acting on the friction stir device can be reduced.

Moreover, since the rotary tool F is inserted into the auxiliary member 30 which is softer than the first metal member 1 and the second metal member 20, the life of the rotary tool F can be lengthened. Further, since the stirring pin F2 and the first metal member 1 and the second metal member 20 are kept in contact with each other only slightly, a large amount of the hard metal of the first metal member 1 and the second metal member 20 is mixed into the auxiliary member 30 side. can be prevented, the bonding strength can be further increased.

In addition, since the end surface 1a of the first metal member 1 and the peripheral edge portion 20d of the second metal member 20 are provided with inclined surfaces, the stirring pin F2 and the first metal member 1 and the second metal member 20 do not come into large contact with each other. can be prevented. In addition, in the present embodiment, the taper angle of the stirring pin F2 and the inclination angle of the end surface 1a and the peripheral edge portion 20d are set to be the same (substantially parallel), so friction stirring can be performed in a well-balanced manner over the height direction. .

Moreover, when the welding length of friction stir welding becomes long, the auxiliary member 30 is also formed long accordingly. If friction stir welding is performed in such a case, there is a problem that the auxiliary member 30 is lifted. However, according to the present embodiment, since the auxiliary member 30 is provided with the projection 32, the projection 32 is engaged with the inner peripheral surface 1h of the peripheral wall 1e, thereby preventing the auxiliary member 30 from rising. As a result, it is possible to prevent displacement of the auxiliary member 30 with respect to the first metal member 1 and the second metal member 20, so that more favorable friction stir welding can be performed.

[Second embodiment]
Next, a method for manufacturing a hollow container according to the second embodiment of the present invention will be described. FIG. 6 is a cross-sectional view showing a butting step in the hollow container manufacturing method according to the second embodiment of the present invention.
A hollow container manufacturing method according to the second embodiment includes a preparation step, a butting step, and a joining step. The second embodiment mainly differs from the first embodiment in the shape of the auxiliary member 30A. In this embodiment, the description will focus on the parts that are different from the first embodiment.

As shown in FIG. 6, the first metal member 1 and the second metal member 20 are the same as in the first embodiment. 30 A of auxiliary members consist of the main-body part 31 of cross-sectional trapezoid shape. That is, the auxiliary member 30A of the second embodiment does not have the projecting portion 32 of the auxiliary member 30 (see FIG. 3) of the first embodiment.

In the butting step, as in the first embodiment, the first metal member 1 and the second metal member 20 are butted from both sides of the auxiliary member 30A. The end surface 1a of the first metal member 1 and the side surface 30b of the auxiliary member 30 are butted together to form a butt portion J11. The peripheral edge portion 20d of the second metal member 20 and the side surface 30c of the auxiliary member 30 are butted to form a butt portion J12.
In the joining step, as in the first embodiment, the rotary tool F is used to perform friction stir welding on the butted portions J11 and J12.

Approximately the same effect as the first embodiment can be obtained by the second embodiment described above. Further, since the auxiliary member 30A of the second embodiment has a trapezoidal cross section, the auxiliary member 30A can be easily manufactured by extrusion molding.

[Third embodiment]
Next, a method for manufacturing a hollow container according to the third embodiment of the present invention will be described. FIG. 7 is a cross-sectional view showing a butting step in the hollow container manufacturing method according to the third embodiment of the present invention. FIG. 8 is a cross-sectional view showing a joining step in the hollow container manufacturing method according to the third embodiment of the present invention.
In the hollow container manufacturing method according to the third embodiment, a preparation step, a butting step, and a joining step are performed. The third embodiment mainly differs from the first embodiment in the shape of the auxiliary member 30B. In this embodiment, the description will focus on the parts that are different from the first embodiment.

In the preparation step, the first metal member 1, the second metal member 20B, and the auxiliary member 30B are prepared. The first metal member 1 is generally the same as in the first embodiment. The second metal member 20B does not have an inclined surface on the peripheral edge portion 20d of the back surface 20b.

The auxiliary member 30B of the third embodiment includes a main body portion 31B having a trapezoidal cross section and projections 32 that protrude from the inner peripheral surface 30d of the main body portion 31B.
The body portion 31B includes an outer peripheral surface (front surface) 30a, side surfaces 30b and 30c, and an inner peripheral surface (back surface) 30d. The side surface 30c is perpendicular to the outer peripheral surface 30a. The side surface 30b is slanted so as to taper away from the outer peripheral surface 30a. The inclination angle of the side surface 30 c is the same as the inclination angle of the end surface 1 a of the first metal member 1 . The protrusion 32 is generally the same as in the first embodiment.

In the butting step, the first metal member 1, the second metal member 20B, and the auxiliary member 30B are butted against each other. The end surface 1a of the first metal member 1B and the side surface 30b of the auxiliary member 30B are butted together to form a butt portion J11. The peripheral edge portion 20d of the second metal member 20B and the side surface 30c of the auxiliary member 30B are butted to form a butt portion J12. An outer peripheral surface (surface) 30a of the auxiliary member 30 is flush with the outer peripheral surface 1g of the first metal member 1 and the outer peripheral surface 20c of the second metal member 20B. An inner peripheral surface (rear surface) 30d of the auxiliary member 30B is flush with the inner peripheral surface 1h of the first metal member 1 .

In the joining step, as shown in FIG. 8, a rotating tool F is used to perform friction stir welding. In the third embodiment, only the stirring pin F2 of the rotating tool F is inserted into the auxiliary member 30B, and the base end side of the stirring pin F2 is exposed and relatively moved along the auxiliary member 30B to form the abutment portions J11 and J12. Friction stir welding is performed on the
Further, in the third embodiment, the rotation center axis Z of the stirring pin F2 is inclined toward the bottom portion 1d of the first metal member 1, and the outer peripheral surface of the stirring pin F2 is aligned with the end surface 1a of the first metal member 1 and the second Friction stir-stirring is performed in a state of slightly contacting the peripheral edge portion 20d of the two metal members 20B.
The angle of inclination of the rotating tool F may be set as appropriate. It is preferable to set so that the edge portion 20d of 20B is parallel.

Approximately the same effects as those of the first embodiment can be obtained by the hollow container manufacturing method according to the third embodiment described above. Further, in the third embodiment, since the peripheral edge portion 20d of the second metal member 20B does not need to be an inclined surface, labor can be saved. Note that the protrusion 32 may be omitted.

[Fourth embodiment]
Next, a method for manufacturing a hollow container according to the fourth embodiment of the present invention will be described. FIG. 9 is a perspective view showing a preparatory step of a hollow container manufacturing method according to a fourth embodiment of the present invention. FIG. 10 is a cross-sectional view showing a butting step in the hollow container manufacturing method according to the fourth embodiment. FIG. 11 is a perspective view showing a butting step in the hollow container manufacturing method according to the fourth embodiment.
In the hollow container manufacturing method according to the fourth embodiment, a preparation step, a butting step, and a joining step are performed. The fourth embodiment differs from the first embodiment mainly in the shapes of the first metal member 1C, the second metal member 20C and the auxiliary member 30C. In this embodiment, the description will focus on the parts that are different from the first embodiment.

As shown in FIG. 9, the central portion of the inner surface 1c of the first metal member 1C of the fourth embodiment has a circular bottom portion 1d and a cylindrical peripheral wall portion 1e rising from the peripheral edge portion of the bottom portion 1d. A recess 1f is formed.
20 C of 2nd metal members of 4th embodiment exhibit disk shape. A peripheral edge portion 20d of the back surface 20b of the second metal member 20C is inclined so as to become thinner toward the outer peripheral surface 20c. The inclined surface of the peripheral portion 20d is formed over the entire circumference.
The auxiliary member 30C of the fourth embodiment is a circular frame-shaped member interposed between the first metal member 1C and the second metal member 20C. The auxiliary member 30C has a trapezoidal cross section that tapers inward.

In the butting step, as shown in FIG. 10, the butting portions J11 and J12 are formed by sandwiching the auxiliary member 30C between the end surface 1a of the first metal member 1C and the peripheral edge portion 20d of the second metal member 20C. . The butted portion J11 is a portion where the end surface 1a of the first metal member 1C and the side surface 30b of the auxiliary member 30C are butted. The butted portion J12 is a portion where the peripheral portion 20d of the second metal member 20C and the side surface 30c of the auxiliary member 30C are butted.

In the joining step, as shown in FIG. 10, only the stirring pin F2 is brought into contact with the first metal member 1C, the second metal member 20C and the auxiliary member 30C in substantially the same manner as in the first embodiment, and the proximal end of the stirring pin F2 is Friction stir is performed in a state where the side is exposed from the first metal member 1C and the second metal member 20C. Then, as shown in FIG. 11, the rotary tool F is relatively moved along the auxiliary member 30C, and the rotary tool F is made to go around the first metal member 1C and the second metal member 20C. A plasticized region W is formed in the movement trajectory of the rotating tool F. As shown in FIG.

By friction stir welding the peripheral wall portion 1e of the first metal member 1C and the peripheral edge portion 20d of the second metal member 20C, a cylindrical hollow container 400 having an internal space formed by the recess 1f is formed.

Approximately the same effects as those of the first embodiment can be obtained by the hollow container manufacturing method according to the fourth embodiment described above.

1 first metal member 1B first metal member (third embodiment)
1C first metal member (fourth embodiment)
1a end surface (inclined surface)
20 Second metal member 20b Rear surface 20d Peripheral edge 30 Auxiliary member 30A Auxiliary member (second embodiment)
30B Auxiliary member (third embodiment)
30C Auxiliary member (fourth embodiment)
32 Projection J11 Butt J12 Butt F Rotary tool F2 Stirring pin

Claims (6)

A manufacturing method for manufacturing a hollow container using a rotating tool with a tapered stirring pin, comprising:
a preparation step of preparing a first metal member having a recess having a bottom portion and a peripheral wall portion rising from the peripheral edge portion of the bottom portion, a plate-like second metal member, and a frame-like auxiliary member;
The end surface of the peripheral wall portion of the first metal member and the peripheral edge portion of the back surface of the second metal member are opposed to each other, and the auxiliary member is inserted into the gap between the end surface and the peripheral edge portion of the first metal member. The end surface of the peripheral wall portion and one side surface of the auxiliary member are butted to form a first butting portion, and the peripheral portion of the back surface of the second metal member and the other side surface of the auxiliary member are butting to form a second butting portion. a butting step to form
The rotary tool that rotates is inserted only from the surface of the auxiliary member, and while only the stirring pin is brought into contact with the auxiliary member, the outer peripheral surface of the stirring pin slightly touches the first metal member and the second metal member. joining the first metal member and the second metal member via an auxiliary member by relatively moving the rotating tool along the first abutment portion and the second abutment portion while in contact with the and
The first metal member, the second metal member, and the auxiliary member are made of aluminum or an aluminum alloy, and the first metal member and the second metal member have higher hardness than the auxiliary member,
At least one of the end surface of the peripheral wall portion of the first metal member and the peripheral edge portion of the back surface of the second metal member has an outwardly inclined surface, and the auxiliary member has a surface side on at least one side surface. A method for manufacturing a hollow container, characterized by comprising an inclined surface that tapers from the top toward the back side. A manufacturing method for manufacturing a hollow container using a rotating tool with a tapered stirring pin, comprising:
a preparation step of preparing a first metal member having a recess having a bottom portion and a peripheral wall portion rising from the peripheral edge portion of the bottom portion, a plate-like second metal member, and a frame-like auxiliary member;
The end surface of the peripheral wall portion of the first metal member and the peripheral edge portion of the back surface of the second metal member are opposed to each other, and the auxiliary member is inserted into the gap between the end surface and the peripheral edge portion of the first metal member. The end surface of the peripheral wall portion and one side surface of the auxiliary member are butted to form a first butting portion, and the peripheral portion of the back surface of the second metal member and the other side surface of the auxiliary member are butting to form a second butting portion. a butting step to form
The rotary tool that rotates is inserted only from the surface of the auxiliary member, and while only the stirring pin is brought into contact with the auxiliary member, the outer peripheral surface of the stirring pin slightly touches the first metal member and the second metal member. joining the first metal member and the second metal member via an auxiliary member by relatively moving the rotating tool along the first abutment portion and the second abutment portion while in contact with the and
The first metal member, the second metal member, and the auxiliary member are made of aluminum or an aluminum alloy, and the first metal member and the second metal member have higher hardness than the auxiliary member,
The end surface of the peripheral wall portion of the first metal member and the peripheral edge portion of the back surface of the second metal member are provided with inclined surfaces that are inclined outward, and the auxiliary member is provided on both side surfaces from the front surface side to the back surface side. A method for manufacturing a hollow container, characterized by comprising an inclined surface that tapers toward the bottom. A manufacturing method for manufacturing a hollow container using a rotating tool with a tapered stirring pin, comprising:
a preparation step of preparing a first metal member having a recess having a bottom portion and a peripheral wall portion rising from the peripheral edge portion of the bottom portion, a plate-like second metal member, and a frame-like auxiliary member;
The end surface of the peripheral wall portion of the first metal member and the peripheral edge portion of the back surface of the second metal member are opposed to each other, and the auxiliary member is inserted into the gap between the end surface and the peripheral edge portion of the first metal member. The end surface of the peripheral wall portion and one side surface of the auxiliary member are butted to form a first butting portion, and the peripheral portion of the back surface of the second metal member and the other side surface of the auxiliary member are butting to form a second butting portion. a butting step to form
The rotary tool that rotates is inserted only from the surface of the auxiliary member, and while only the stirring pin is brought into contact with the auxiliary member, the outer peripheral surface of the stirring pin slightly touches the first metal member and the second metal member. joining the first metal member and the second metal member via an auxiliary member by relatively moving the rotating tool along the first abutment portion and the second abutment portion while in contact with the and
The first metal member, the second metal member, and the auxiliary member are made of aluminum or an aluminum alloy, and the first metal member and the second metal member have higher hardness than the auxiliary member,
At least one of the end surface of the peripheral wall portion of the first metal member and the peripheral edge portion of the back surface of the second metal member has an outwardly inclined surface, and the auxiliary member has a surface side on at least one side surface. A method for manufacturing a hollow container, comprising: providing an inclined surface that tapers from the bottom toward the back side; A manufacturing method for manufacturing a hollow container using a rotating tool with a tapered stirring pin, comprising:
a preparation step of preparing a first metal member having a recess having a bottom portion and a peripheral wall portion rising from the peripheral edge portion of the bottom portion, a plate-like second metal member, and a frame-like auxiliary member;
The end surface of the peripheral wall portion of the first metal member and the peripheral edge portion of the back surface of the second metal member are opposed to each other, and the auxiliary member is inserted into the gap between the end surface and the peripheral edge portion of the first metal member. The end surface of the peripheral wall portion and one side surface of the auxiliary member are butted to form a first butting portion, and the peripheral portion of the back surface of the second metal member and the other side surface of the auxiliary member are butting to form a second butting portion. a butting step to form
The rotary tool that rotates is inserted only from the surface of the auxiliary member, and while only the stirring pin is brought into contact with the auxiliary member, the outer peripheral surface of the stirring pin slightly touches the first metal member and the second metal member. joining the first metal member and the second metal member via an auxiliary member by relatively moving the rotating tool along the first abutment portion and the second abutment portion while in contact with the and
The first metal member, the second metal member, and the auxiliary member are made of aluminum or an aluminum alloy, and the first metal member and the second metal member have higher hardness than the auxiliary member,
The end surface of the peripheral wall portion of the first metal member and the peripheral edge portion of the back surface of the second metal member are provided with inclined surfaces that are inclined outward, and the auxiliary member is provided on both side surfaces from the front surface side to the back surface side. A method for manufacturing a hollow container, comprising: providing an inclined surface that tapers toward the bottom, and providing a projecting portion that widens toward at least one side surface on the back surface side. 5. The method for manufacturing a hollow container according to any one of claims 1 to 4, wherein in the joining step, the rotary tool is rotated around the first metal member and the second metal member. . 6. Manufacturing a hollow container according to any one of claims 1 to 5, wherein the first metal member and the second metal member are cast materials, and the auxiliary member is a wrought material. Method.

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