JP2020185606A - Manufacturing method of hollow container - Google Patents

Abstract

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. A rotating rotary tool F is inserted only from the outer peripheral surface (surface) 30a of an auxiliary member 30, and while only the stirring pin F2 is brought into contact with the auxiliary member 30, the outer peripheral surface of the stirring pin F2 is attached to the first metal member. 1 and the second metal member 20 are slightly in contact with each other, and the rotating tool F is relatively moved to join the first metal member 1 and the second metal member 20 via the auxiliary member 30; Including, the first metal member 1 and the second metal member 20 have higher hardness than the auxiliary member 30, and at least one of the end surface 1a of the first metal member 1 and the peripheral edge portion 20d of the back surface 20b of the second metal member 20, Equipped with an outwardly inclined surface, the auxiliary member 30 is characterized in that at least one side surface of the auxiliary member 30 is provided with an inclined surface that tapers from the surface side toward the back surface side. [Selection drawing] Fig. 4

Description

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

For example, Patent Document 1 discloses an invention in which a pair of plate-shaped metal members are friction-stir welded using a rotary tool. In the present invention, an auxiliary member softer than the metal member is interposed between the pair of metal members, and a rotation tool is inserted into the auxiliary member to perform friction stir welding. When metal members having high hardness are joined by friction stir welding, there is a problem that the rotating tool is severely damaged and the tool cost increases. However, according to the present invention, since the rotary tool is inserted into the soft auxiliary member to perform friction stir welding, the metal members having high hardness can be suitably joined to each other.

Japanese Unexamined Patent Publication No. 2007-83242

In the conventional joining method, there is a problem that it is difficult to insert the stirring pin into the auxiliary member because the stirring pin of the rotating tool has a columnar shape. Further, since the friction stir is performed in a state where 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 becomes large.

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

In order to solve the above problems, the present invention is a manufacturing method for manufacturing a hollow container by using a rotating tool provided with a tapered stirring pin, wherein a recess having a bottom portion and a peripheral wall portion rising from a peripheral portion of the bottom portion is provided. A preparatory step for preparing a first metal member, a plate-shaped second metal member, and a frame-shaped auxiliary member, an end surface of a peripheral wall portion of the first metal member, and a peripheral edge of the back surface of the second metal member. The auxiliary member is sandwiched between the end face and the peripheral edge portion so that the portions face each other, and the end surface of the peripheral wall portion of the first metal member and one side surface of the auxiliary member are abutted to form the first butt portion. The butt step of forming the second butt 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 the rotating tool from only the surface of the auxiliary member. The first butt portion and the first butt portion and the second metal member are inserted and the outer peripheral surface of the stirring pin is slightly contacted with the first metal member and the second metal member while only the stirring pin is in contact with the auxiliary member. The first metal member, said, includes a joining step of relatively moving the rotating tool along the second butt portion to join the first metal member and the second metal member via an auxiliary member. The second metal member and the auxiliary member are formed of aluminum or an aluminum alloy, and the first metal member and the second metal member have higher hardness than the auxiliary member, and the end face and the peripheral wall portion of the first metal member At least one of the peripheral edges of the back surface of the second metal member is provided with an inclined surface that is inclined toward the outside, and the auxiliary member is an inclined surface that is tapered from the front surface side to the back surface side on at least one side surface. It is characterized by having.

Further, the present invention is a manufacturing method for manufacturing a hollow container by using a rotating tool provided with a tapered stirring pin, and is a first metal member having a bottom portion and a concave portion having a peripheral wall portion rising from a peripheral portion of the bottom portion. The preparatory step for preparing the plate-shaped second metal member and the frame-shaped auxiliary member, and the end face of the peripheral wall portion of the first metal member and the peripheral edge portion of the back surface of the second metal member face each other. The auxiliary member is sandwiched between the end face and the peripheral edge portion, and the end face of the peripheral wall portion of the first metal member and one side surface of the auxiliary member are abutted to form the first butt portion. The butt step of forming the second butt 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 the rotating tool is inserted only from the surface surface of the auxiliary member, and the said The first butt portion and the second butt portion are in a state where only the stirring pin is in contact with the auxiliary member and the outer peripheral surface of the stirring pin is slightly in contact with the first metal member and the second metal member. The first metal member, the second metal member, and a joining step of joining the first metal member and the second metal member via an auxiliary member by relatively moving the rotation tool along the above. The auxiliary member is formed of aluminum or an aluminum alloy, and the first metal member and the second metal member have higher hardness than the auxiliary member, and the end face of the peripheral wall portion of the first metal member and the second metal member. The peripheral edge of the back surface of the metal is provided with an inclined surface that is inclined toward the outside, and the auxiliary member is provided with an inclined surface that is tapered from the front surface side to the back surface side on both side surfaces.

Further, the present invention is a manufacturing method for manufacturing a hollow container by using a rotating tool provided with a tapered stirring pin, and is a first metal member having a bottom portion and a concave portion having a peripheral wall portion rising from a peripheral portion of the bottom portion. The preparatory step for preparing the plate-shaped second metal member and the frame-shaped auxiliary member, and the end face of the peripheral wall portion of the first metal member and the peripheral edge portion of the back surface of the second metal member face each other. The auxiliary member is sandwiched between the end face and the peripheral edge portion, and the end face of the peripheral wall portion of the first metal member and one side surface of the auxiliary member are abutted to form the first butt portion. The butt step of forming the second butt 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 the rotating tool is inserted only from the surface surface of the auxiliary member, and the said The first butt portion and the second butt portion are in a state where only the stirring pin is in contact with the auxiliary member and the outer peripheral surface of the stirring pin is slightly in contact with the first metal member and the second metal member. The first metal member, the second metal member, and a joining step of joining the first metal member and the second metal member via an auxiliary member by relatively moving the rotation tool along the above. The auxiliary member is formed of aluminum or an aluminum alloy, and the first metal member and the second metal member have higher hardness than the auxiliary member, and the end face of the peripheral wall portion of the first metal member and the second metal member. At least one of the peripheral edges of the back surface thereof is provided with an inclined surface that is inclined toward the outside, and the auxiliary member is provided with an inclined surface that is tapered from the front surface side to the back surface side on at least one side surface and is provided with an inclined surface that is tapered from the front surface side to the back surface side. It is characterized by having a protrusion on the side that extends toward at least one side surface side.

Further, the present invention is a manufacturing method for manufacturing a hollow container by using a rotating tool provided with a tapered stirring pin, and is a first metal member having a bottom portion and a concave portion having a peripheral wall portion rising from a peripheral portion of the bottom portion. The preparatory step for preparing the plate-shaped second metal member and the frame-shaped auxiliary member, and the end face of the peripheral wall portion of the first metal member and the peripheral edge portion of the back surface of the second metal member face each other. The auxiliary member is sandwiched between the end face and the peripheral edge portion, and the end face of the peripheral wall portion of the first metal member and one side surface of the auxiliary member are abutted to form the first butt portion. The butt step of forming the second butt 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 the rotating tool is inserted only from the surface surface of the auxiliary member, and the said The first butt portion and the second butt portion are in a state where only the stirring pin is in contact with the auxiliary member and the outer peripheral surface of the stirring pin is slightly in contact with the first metal member and the second metal member. The first metal member, the second metal member, and a joining step of joining the first metal member and the second metal member via an auxiliary member by relatively moving the rotation tool along the above. The auxiliary member is formed of aluminum or an aluminum alloy, and the first metal member and the second metal member have higher hardness than the auxiliary member, and the end face of the peripheral wall portion of the first metal member and the second metal member. The peripheral edge of the back surface of the metal surface is provided with an inclined surface that is inclined toward the outside, and the auxiliary member is provided with an inclined surface that is tapered from the front surface side to the back surface side on both side surfaces, and at least one of the auxiliary members is provided on the back surface side. It is characterized by having a protrusion that expands toward the side surface side.

According to such a method for manufacturing a hollow container, since a rotating tool provided with a tapered stirring pin is used, it can be easily inserted into an auxiliary member. Further, since only the stirring pin is inserted into the auxiliary member, the load acting on the friction stir device can be reduced. Further, since the rotation tool is inserted into the auxiliary member that is softer than the first metal member and the second metal member, the life of the rotation tool can be extended. Further, the joint strength can be increased by slightly contacting the stirring pin with the first metal member and the second metal member.

Further, when a protrusion that expands toward at least one side surface side is provided on the back surface side of the auxiliary member, it is possible to prevent the auxiliary member from rising when friction stir welding is performed. As a result, it is possible to prevent the auxiliary member from being displaced with respect to the first metal member and the second metal member, so that friction stir welding can be performed more preferably.

Further, in the joining step, it is desirable that the rotating tool goes 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 to each other.

According to the method for manufacturing a hollow container according to the present invention, metal members having high hardness can be suitably joined to form a hollow container.

It is a perspective view which shows the preparation process of the manufacturing method of the hollow container which concerns on 1st Embodiment of this invention. It is a perspective view which shows before processing of the auxiliary member which concerns on 1st Embodiment. It is sectional drawing which shows the butt process of the manufacturing method of the hollow container which concerns on 1st Embodiment. It is sectional drawing which shows the joining process of the manufacturing method of the hollow container which concerns on 1st Embodiment. It is a perspective view which shows the joining process of the manufacturing method of the hollow container which concerns on 1st Embodiment. It is sectional drawing which shows the butt process of the manufacturing method of the hollow container which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the butt process of the manufacturing method of the hollow container which concerns on 3rd Embodiment of this invention. It is sectional drawing which shows the joining process of the manufacturing method of the hollow container which concerns on 3rd Embodiment. It is a perspective view which shows the preparation process of the manufacturing method of the hollow container which concerns on 4th Embodiment of this invention. It is sectional drawing which shows the joining process of the manufacturing method of the hollow container which concerns on 4th Embodiment. It is a perspective view which shows the joining process of the manufacturing method of the hollow container which concerns on 4th Embodiment.

[First Embodiment]
The first embodiment of the present invention will be described with reference to the drawings as appropriate. The method for manufacturing a hollow container according to the first embodiment includes a preparation step, a butt step, and a joining step. As shown in FIG. 5, in the present 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 means a surface opposite to the "inner peripheral surface". Further, the "front surface" in the following description means 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.
The first metal member 1 and the second metal member 20 are quadrangular metal members. The first metal member 1 and the second metal member 20 are not particularly limited as long as they are metals capable of friction stir welding, and for example, aluminum or an aluminum alloy is used. In this embodiment, the first metal member 1 and the second metal member 20 use an aluminum alloy cast material such as JISH5302 ADC12 (Al—Si—Cu system).

At the center of the inner surface 1c of the first metal member 1, a concave portion 1f having a quadrangular bottom portion 1d and a square tubular peripheral wall portion 1e rising from the peripheral edge portion of the bottom portion 1d is formed.

The second metal member 20 has a rectangular plate shape. The 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 edge 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. That is, 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 be separated 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 20d are the same with respect to the virtual orthogonal surface 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 of a long member 15 which is an extruded material having a substantially trapezoidal cross section. In the long member 15, four notches 15a are formed at intervals in the longitudinal direction on the inner peripheral side surface of the auxiliary member 30 (see FIG. 3). Then, as shown in FIG. 1, a quadrangular frame-shaped auxiliary member 30 is formed by bending the long member 15 at a right angle in each notch 15a and abutting both ends of the long member 15. .. 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 main body portion 31 having a trapezoidal cross section, and a protruding portion 32 protruding inward from the inner peripheral surface (back surface) 30d of the main body portion 31.
The main body 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 are closer to each other as they are separated 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 side to the inner peripheral surface 30d side. The inclination angles of the side surfaces 30b and 30c are the same as the inclination angles of the opposite end faces 1a and the peripheral edge portion 20d, respectively.
The protrusion 32 has a rectangular cross section that is wider than the inner peripheral surface (back surface) 30d of the main body 31. The protrusion 32 is formed in a constant shape in the circumferential direction of the auxiliary member 30.

As shown in FIG. 3, the butt step is a step of butt-butting the first metal member 1, the second metal member 20, and the auxiliary member 30. In the butt 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 so as to face each other. Further, the auxiliary member 30 is sandwiched between the end face 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 abutted so as to be in substantially surface contact, and the abutting portion J11 is formed. The peripheral edge portion 20d of the second metal member 20 and the side surface 30c of the auxiliary member 30 are abutted so as to be substantially in surface contact with each other to form the abutting portion J12. The 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 20. The inner peripheral surface 30d of the auxiliary member 30 is flush with the inner peripheral surface 1h of the first metal member 1. Further, the protrusion 32 is locked to the inner peripheral surface 1h of the first metal member 1.

Here, as shown in FIG. 4, the rotation tool F is composed of a base portion F1 and a stirring pin F2. The rotary tool F is made of, for example, tool steel. The base portion F1 is a portion connected to the rotation shaft of the friction stir welder. The stirring pin F2 hangs down from the base F1 and is tapered. A flat surface F3 perpendicular to the rotation center axis is formed at the tip of the stirring pin F2. The flat surface F3 is formed to have a size slightly larger than the inner peripheral surface 30d of the auxiliary member 30.

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

A spiral groove is engraved on the outer peripheral surface of the stirring pin F2. In the present embodiment, in order to rotate the rotation tool F clockwise, a spiral groove is formed counterclockwise from the proximal end side toward the distal end side. When the rotation tool F is rotated counterclockwise, a spiral groove is formed clockwise from the proximal end side to the distal end side. In this way, the plastically fluidized metal is guided by the spiral groove and moves to the tip side, so that the generation of burrs can be suppressed. The rotation tool F can be used, for example, by attaching it to an arm robot having a rotation driving means at its tip.

As shown in FIG. 4, the joining step is a step of friction stir welding the first metal member 1 and the second metal member 20 using the rotary tool F. In the joining step, the stirring pin F2 of the rotating tool F rotated clockwise 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 have to be in contact with the end surface 1a of the first metal member 1 and the peripheral surface 20d of the second metal member 20, but in the present embodiment, the outer peripheral surface of the stirring pin F2 is brought into contact with the end surface. It is relatively moved along the auxiliary member 30 in a state of being slightly in contact with 1a and the peripheral edge portion 20d. The contact allowance 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 be less than 1.0 mm, for example.

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 proximal 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. 5, the rotation tool F is relatively moved along the auxiliary member 30, and the rotation tool F is made 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 to form a starting end. Overlap with the end. When the end position is reached, the rotation tool F is separated from the auxiliary member 30. As described above, the butt portions J11 and J12 are simultaneously friction stir welded in one step. A plasticized region W is formed in the movement locus of the rotation tool F.
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 method for manufacturing the hollow container 300 according to the present embodiment described above, as shown in FIG. 4, since the rotary tool F provided with the tapered stirring pin F2 is used, the outer peripheral surface (surface) 30a of the auxiliary member 30 is used. Can be easily inserted into. 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 for friction stir, the load acting on the friction stir device can be reduced.

Further, since the rotation 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 rotation tool F can be extended. Further, in order to keep the stirring pin F2 in contact with the first metal member 1 and the second metal member 20 slightly, a large amount of hard metal of the first metal member 1 and the second metal member 20 is mixed in the auxiliary member 30 side. Therefore, the joint strength can be further increased.

Further, 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 come into large contact with each other. Can be prevented. Further, in the present embodiment, since the taper angle of the stirring pin F2 and the inclination angle of the end face 1a and the peripheral edge portion 20d are the same (generally parallel), friction stirring can be performed in a well-balanced manner over the height direction. ..

Further, as the joint length of the friction stir welding becomes longer, the auxiliary member 30 is also formed longer 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 protrusion 32, the protrusion 32 is locked to the inner peripheral surface 1h of the peripheral wall portion 1e to prevent the auxiliary member 30 from rising. As a result, it is possible to prevent the auxiliary member 30 from being displaced with respect to the first metal member 1 and the second metal member 20, so that friction stir welding can be performed more preferably.

[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 butt step of the method for manufacturing a hollow container according to the second embodiment of the present invention.
The method for manufacturing a hollow container according to the second embodiment includes a preparation step, a butt step, and a joining step. In the second embodiment, the shape of the auxiliary member 30A is mainly different from that of the first embodiment. In this embodiment, the parts different from the first embodiment will be mainly described.

As shown in FIG. 6, the first metal member 1 and the second metal member 20 are the same as those in the first embodiment. The auxiliary member 30A is composed of a main body portion 31 having a trapezoidal cross section. That is, the auxiliary member 30A of the second embodiment does not have the protrusion 32 of the auxiliary member 30 (see FIG. 3) of the first embodiment.

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

The second embodiment described above can also have substantially the same effect as that of the first embodiment. 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 a third embodiment of the present invention will be described. FIG. 7 is a cross-sectional view showing a butt step of the method for manufacturing a hollow container according to a third embodiment of the present invention. FIG. 8 is a cross-sectional view showing a joining step of the method for manufacturing a hollow container according to a third embodiment of the present invention.
In the method for manufacturing a hollow container according to the third embodiment, a preparation step, a butt step, and a joining step are performed. In the third embodiment, the shape of the auxiliary member 30B is mainly different from that of the first embodiment. In this embodiment, the parts different from the first embodiment will be mainly described.

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 substantially the same as 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 a protruding portion 32 protruding from the inner peripheral surface 30d of the main body portion 31B.
The main body 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 inclined so as to taper away from the outer peripheral surface 30a. The inclination angle of the side surface 30c is the same as the inclination angle of the end surface 1a of the first metal member 1. The protrusion 32 is substantially the same as that of the first embodiment.

In the butt 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 abutted to form the abutting portion J11. The peripheral edge portion 20d of the second metal member 20B and the side surface 30c of the auxiliary member 30B are abutted to form the abutting portion J12. The 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, respectively. The inner peripheral surface (back 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, friction stir welding is performed using the rotary tool F. In the third embodiment, only the stirring pin F2 of the rotating tool F is inserted into the auxiliary member 30B, and the butt portions J11 and J12 are moved relative to each other along the auxiliary member 30B with the base end side of the stirring pin F2 exposed. Friction stir welding is performed.
Further, in the third embodiment, the outer peripheral surface of the stirring pin F2 is formed with the end surface 1a of the first metal member 1 while inclining the rotation center axis Z of the stirring pin F2 toward the bottom 1d side of the first metal member 1. (Ii) Friction stir welding is performed in a state where the metal member 20B is slightly in contact with the peripheral edge portion 20d.
The inclination angle of the rotation tool F may be appropriately set, but the outer peripheral surface of the stirring pin F2 and the end surface 1a of the first metal member 1 are parallel to each other, and the outer peripheral surface of the stirring pin F2 and the second metal member 1 are parallel to each other. It is preferable to set it so that it is parallel to the peripheral edge portion 20d of 20B.

The hollow container manufacturing method according to the third embodiment described above can also obtain substantially the same effect as that of the first embodiment. Further, in the third embodiment, since it is not necessary to make the peripheral edge portion 20d of the second metal member 20B an inclined surface, it is possible to save work time and effort. The protrusion 32 may be omitted.

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

As shown in FIG. 9, the central portion of the inner surface 1c of the first metal member 1C of the fourth embodiment is provided with a circular bottom portion 1d and a cylindrical peripheral wall portion 1e rising from a peripheral portion of the bottom portion 1d. A recess 1f is formed.
The second metal member 20C of the fourth embodiment has a disc shape. The 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 edge 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 butt step, as shown in FIG. 10, the butt 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 butt 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 abutted. The butt 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 abutted.

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 base end of the stirring pin F2. Friction stir welding is performed on the side while being exposed from the first metal member 1C and the second metal member 20C. Then, as shown in FIG. 11, the rotation tool F is relatively moved along the auxiliary member 30C, and the rotation 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 locus of the rotation tool F.

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 columnar hollow container 400 having an internal space formed by the recess 1f is formed.

The hollow container manufacturing method according to the fourth embodiment described above can also obtain substantially the same effect as that of the first embodiment.

1 First metal member 1B First metal member (third embodiment)
1C First metal member (fourth embodiment)
1a End face (inclined face)
20 Second metal member 20b Back surface 20d Peripheral part 30 Auxiliary member 30A Auxiliary member (second embodiment)
30B auxiliary member (third embodiment)
30C auxiliary member (fourth embodiment)
32 Protrusion part J11 Butt part J12 Butt part F Rotation tool F2 Stirring pin

Claims (6)

A manufacturing method for manufacturing a hollow container using a rotating tool equipped with a tapered stirring pin.
A preparatory step for 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-shaped second metal member, and a frame-shaped auxiliary member.
The end face of the peripheral wall portion of the first metal member and the peripheral edge portion of the back surface of the second metal member face each other, and the auxiliary member is sandwiched in the gap between the end face and the peripheral edge portion to form the first metal member. The end surface of the peripheral wall portion and one side surface of the auxiliary member are abutted to form a first abutment portion, and the peripheral edge portion of the back surface of the second metal member and the other side surface of the auxiliary member are abutted to form a second abutment portion. Butting process to form
While inserting the rotating tool only from the surface of the auxiliary member and bringing only the stirring pin into contact with the auxiliary member, the outer peripheral surface of the stirring pin is slightly attached to the first metal member and the second metal member. The first metal member and the second metal member are joined via an auxiliary member by relatively moving the rotation tool along the first butt portion and the second butt portion in a state of being in contact with the first metal member. Including the process,
The first metal member, the second metal member, and the auxiliary member are formed 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 inclined surface inclined outward, and the auxiliary member has a surface side on at least one side surface. A method for manufacturing a hollow container, which comprises an inclined surface that tapers from the surface to the back surface side. A manufacturing method for manufacturing a hollow container using a rotating tool equipped with a tapered stirring pin.
A preparatory step for 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-shaped second metal member, and a frame-shaped auxiliary member.
The end face of the peripheral wall portion of the first metal member and the peripheral edge portion of the back surface of the second metal member face each other, and the auxiliary member is sandwiched in the gap between the end face and the peripheral edge portion to form the first metal member. The end surface of the peripheral wall portion and one side surface of the auxiliary member are abutted to form a first abutment portion, and the peripheral edge portion of the back surface of the second metal member and the other side surface of the auxiliary member are abutted to form a second abutment portion. Butting process to form
While inserting the rotating tool only from the surface of the auxiliary member and bringing only the stirring pin into contact with the auxiliary member, the outer peripheral surface of the stirring pin is slightly attached to the first metal member and the second metal member. The first metal member and the second metal member are joined via an auxiliary member by relatively moving the rotation tool along the first butt portion and the second butt portion in a state of being in contact with the first metal member. Including the process,
The first metal member, the second metal member, and the auxiliary member are formed 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 incline outward, and the auxiliary members are directed from the front surface side to the back surface side on both side surfaces. A method for manufacturing a hollow container, which comprises an inclined surface that is tapered. A manufacturing method for manufacturing a hollow container using a rotating tool equipped with a tapered stirring pin.
A preparatory step for 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-shaped second metal member, and a frame-shaped auxiliary member.
The end face of the peripheral wall portion of the first metal member and the peripheral edge portion of the back surface of the second metal member face each other, and the auxiliary member is sandwiched in the gap between the end face and the peripheral edge portion to form the first metal member. The end surface of the peripheral wall portion and one side surface of the auxiliary member are abutted to form a first abutment portion, and the peripheral edge portion of the back surface of the second metal member and the other side surface of the auxiliary member are abutted to form a second abutment portion. Butting process to form
While inserting the rotating tool only from the surface of the auxiliary member and bringing only the stirring pin into contact with the auxiliary member, the outer peripheral surface of the stirring pin is slightly attached to the first metal member and the second metal member. The first metal member and the second metal member are joined via an auxiliary member by relatively moving the rotation tool along the first butt portion and the second butt portion in a state of being in contact with the first metal member. Including the process,
The first metal member, the second metal member, and the auxiliary member are formed 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 inclined surface inclined outward, and the auxiliary member has a surface side on at least one side surface. A method for manufacturing a hollow container, which comprises an inclined surface that tapers from the surface to the back surface side, and also has a protrusion on the back surface side that expands toward at least one side surface side. A manufacturing method for manufacturing a hollow container using a rotating tool equipped with a tapered stirring pin.
A preparatory step for 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-shaped second metal member, and a frame-shaped auxiliary member.
The end face of the peripheral wall portion of the first metal member and the peripheral edge portion of the back surface of the second metal member face each other, and the auxiliary member is sandwiched in the gap between the end face and the peripheral edge portion to form the first metal member. The end surface of the peripheral wall portion and one side surface of the auxiliary member are abutted to form a first abutment portion, and the peripheral edge portion of the back surface of the second metal member and the other side surface of the auxiliary member are abutted to form a second abutment portion. Butting process to form
While inserting the rotating tool only from the surface of the auxiliary member and bringing only the stirring pin into contact with the auxiliary member, the outer peripheral surface of the stirring pin is slightly attached to the first metal member and the second metal member. The first metal member and the second metal member are joined via an auxiliary member by relatively moving the rotation tool along the first butt portion and the second butt portion in a state of being in contact with the first metal member. Including the process,
The first metal member, the second metal member, and the auxiliary member are formed 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 an inclined surface that is inclined outward, and the auxiliary member is directed from the front surface side to the back surface side on both side surfaces. A method for manufacturing a hollow container, characterized in that it is provided with an inclined surface that is tapered, and is provided with a protrusion that expands toward at least one side surface side on the back surface side. The method for manufacturing a hollow container according to any one of claims 1 to 4, wherein in the joining step, the rotating tool is made to go around the first metal member and the second metal member. .. The production of 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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