JPH11226756A - Production method of cylinder with use of friction agitation joining and production device to be used for its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate or simplify a post-treatment of a joining part by continuously subjecting faces to be joined as butting parts of a cylindrical body to friction agitation joining so as to produce a cylindrical body having various cross sectional shapes at a low cost and to have beautiful finish in comparison to fused welding joining. SOLUTION: Materials 1 to be joined of a prescribed shape are formed to a cylindrical body by butting at a prescribed position, faces 3 to be joined for butting parts of the cylindrical body are successively subjected to friction joining. Here, the faces to butt materials to be joined each other are smooth, in the case materials to be joined are butted at a prescribed position, a state having a large clearance at the faces 3 to be joined is not desirable. Further, the faces 3 to be joined requires at least flatness enough to press a tool 21' for friction-agitation joining, some raggedness and curved face are permissible. Further, a material of the material to be joined is preferably a metal having a low melting point such as aluminum alloy, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining a pipe or tube made of a metal, particularly an aluminum alloy, by friction stir welding and an apparatus used for the method. More specifically, it relates to the manufacture of tubes or tubes or their connection.

[0002]

2. Description of the Related Art Heretofore, there has been an extrusion molding method as one of means for producing a hollow tube or tube. However, this method has a problem that it is not economically feasible to manufacture a hollow pipe having a large diameter, because the apparatus becomes large and the cost becomes high.

As another means for producing a hollow tube, a plurality of extruded products are combined and joined, or a plate-like material is bent and joined to a cylindrical body, which is then subjected to MIG welding (Metal Inert).
Gas) or TIG welding (Tungsten Inert Gas) to perform fusion welding from outside the pipe. However, with this method, the finish of the product surface was not clean because the pipe was welded from the outside. Further, in MIG welding and the like, voids and the like are easily generated in a welded portion, and additionally, an expensive inert gas is required. In addition, the same problem as described above also occurs when the pipes are joined so as to be connected.

[0004] On the other hand, in recent years, friction stir welding (Friction), which can join metal materials more easily than arc welding, has been proposed.
Stir Welding) has been attracting attention (Tokuheihei 9-508)
No. 073). As shown in FIG. 11, the friction stir welding is performed by rotating a tool 21 made of tool steel along a surface to be welded where the edges of the materials 1 and 1 ′ abut each other.
This is performed by pressing 'and making it enter. The tool is
A surface pressing portion 21b formed of a cylindrical body having a concave contact surface with the material to be joined and a friction pin 21a extending coaxially from the center thereof, and are horizontally tilted slightly along the abutting surface (FIG. 11). In (b), it is moved in the left direction, and a vertical pressing force is applied.

[0005] Around the friction pin 21a, a screw-shaped friction stirrer blade (not shown) is formed along the horizontal direction. With the rotation of the friction pin 21a, the materials 1 and 1 'near the friction pin on the surface to be welded are plasticized by being heated by frictional heat, and flow in the horizontal and vertical directions between the materials to be welded. Be transformed into Here, the fluidized material to be joined is sufficiently stirred and mixed by the friction pin while the flow in the vertical direction is suppressed by the surface pressing portion 21b. As a result, after the friction pins have passed and been cooled, the materials to be joined are integrated and firmly joined. In addition, the surface of the portion where the friction stir welding was performed is the surface holding portion 2
1b, the joining line is flat and has a constant width. Therefore, there is no raised weld bead like conventional arc welding,
Post-processing is not required or can be simplified. If the length of the friction pin 21a is equal to or slightly shorter than the plate thickness, the surface on the opposite side where the joining operation is performed has a beautiful finish in which the joining line is inconspicuous.

[0006]

However, the production of hollow tubes by extrusion molding, MIG welding, TIG welding or the like has the above-mentioned disadvantages. In friction stir welding, a tool is placed on the surface to be joined. Since large rigidity is required for the equipment to press with a large force, and high butt precision is required unlike ordinary fusion welding, a special large fixing is used when the material to be joined is large or long. Jigs are required, which not only increases equipment costs, but also requires a large amount of labor and time to set and remove the workpiece to and from the large fixing jig, and increases work costs. There were drawbacks.

The present invention came up with the idea of performing friction stir welding from the inner surface in joining the above-mentioned hollow tubes and cylinders, thereby overcoming such conventional disadvantages, and having a beautiful appearance and an arbitrary cross-sectional shape. It is an object of the present invention to provide a method and an apparatus for manufacturing a cylinder using friction stir welding that can manufacture cylinders of various diameters at low cost.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a method for manufacturing a cylinder using friction stir welding according to claim 1 is a method for manufacturing a cylinder having a predetermined shape. Manufacturing a cylinder using friction stir welding, comprising: a step of forming materials into a cylindrical body by abutting the members at predetermined positions; and a step of sequentially friction stir joining the surfaces to be joined, which are butted portions of the cylindrical body. (B) using a friction stir welding tool having a friction pin rotating at a predetermined number of revolutions and a surface pressing portion at a root thereof; and (b) performing the welding from the inner surface of the cylindrical body. Performing friction stir welding of the surface,
(C) receiving the reaction force of the pressing applied to the tool on the other inner surface of the cylinder or the tubular body. Thereby, various cylinders can be reliably manufactured, and the reaction force of pressing applied to the tool can be effectively processed. In addition, the joining line visible on the outer surface of the tube does not become a bead as in arc welding and has a beautiful finish. Note that an aluminum alloy is suitable as the material to be joined (claim 2), and according to this, various cylinders can be provided by friction stir welding.

Further, the invention of the manufacturing method according to claim 3 is
3. The method for manufacturing a cylinder using friction stir welding according to claim 1 or 2, wherein (a) the material to be welded is formed by arranging a cylindrical body having a desired cross-sectional shape in a direction parallel to its axis.
(B) a material made of two materials having a shape divided into two, and capable of forming a cylindrical body having an arbitrary cross-sectional shape by laminating the materials;
The number of the tools is two, and the reaction force of the pressing applied to one of the tools is received by the other tool on the inner surface on the opposite side of the cylinder or the cylindrical body. This allows
By joining the materials to be joined together, it is possible to reliably manufacture cylinders having various cross-sectional shapes.

Further, according to the method of the present invention, there is provided a method for manufacturing a cylinder using friction stir welding according to claim 1 or 2, wherein the material to be welded is a strip, and the strip is sequentially spirally formed. It is possible to form a cylindrical body that is a spiral tube having an arbitrary diameter by winding (claim 4), or the material to be joined is a plate material, and the plate material is sequentially wound so as to be arbitrary. (Claim 5) is characterized in that it can form a tubular body which is a suture tube having a diameter of (5). According to this, spiral tubes and suture tubes having various diameters and lengths can be reliably provided.

Further, in the crane boom material according to claim 6, the material to be joined is formed by extrusion of an aluminum alloy.
It is manufactured by the method of manufacturing a cylinder using friction stir welding described in the item. The resulting crane boom is light and solid.

Further, the invention of a manufacturing method according to claim 7 is as follows.
Forming a long tubular body by abutting end faces on one side of the material to be joined, which are two cylinders having a predetermined diameter,
A friction stir welding step of sequentially joining surfaces to be joined, which are butted portions of the cylindrical body, comprising: (b) a step of: (C) using a friction stir welding tool having a friction pin rotating at a predetermined rotation speed and a surface pressing portion at the base thereof, and
Receiving the reaction force of the pressing applied to the tool on the other inner surface of the cylinder or the tubular body. According to this, the cylinders to be joined can be securely joined to each other, and a long cylinder can be easily manufactured.
Further, in this case, if two tools are used and the other tool receives the reaction force of the pressing applied to one of the tools on the inner surface on the opposite side of the cylinder or the cylindrical body (claim 8),
As the working speed increases, the reaction force of the pressing applied to the tool can be used without waste.

According to a ninth aspect of the present invention, in the method of manufacturing a cylinder utilizing friction stir welding according to the seventh or eighth aspect, the surfaces to be formed formed in the circumferential direction of the cylindrical body are sequentially arranged. At the time of friction stir welding, while forming a closed joining line where the starting point and the ending point of joining overlap, and forming the overlap, by sequentially pulling up the tool, the joining line is directed toward the end point. It is characterized by being formed shallow sequentially. As a result, in the overlap portion, the depth of the working area formed by the friction pins gradually decreases, so that the cylinders to be joined can be reliably joined to each other. In addition, since the joining line is flat from the start point to the end point without any trace of the friction pin coming off, a high-quality product can be provided without performing post-processing.

According to a tenth aspect of the present invention, there is provided an apparatus for manufacturing a cylinder utilizing friction stir welding, wherein a material to be welded having a predetermined shape is butted at a predetermined position to form a tubular body, and the material to be welded is the butted portion. An apparatus for manufacturing a cylinder using friction stir welding in which surfaces are sequentially friction stir welded to produce a cylinder,
A fixing leg for fixing a material formed into a cylindrical body by abutting the materials to be joined at a predetermined position, and having rolling means or sliding means at a contact portion with the material to be joined, Means for pressing the fixing leg against the material to be joined with a predetermined force, a fixing jig provided outside the material to be joined, (b) a friction pin having a friction pin and a surface pressing portion at its base. A joining arm having a tool for performing welding and a means for pressing the tool against the surface to be joined with a predetermined force, a driving means for rotating the friction pin at a predetermined number of rotations, and a counter-pressure applied to the tool. A reaction force receiving portion for receiving a force on the other inner surface of the cylindrical body or the cylinder,
A joining device installed inside the material to be joined, comprising: a guide leg having rolling means or sliding means at a contact portion with the material to be joined and guiding the tool to the surface to be joined;
(C) The device comprises a means for feeding a surface to be joined which can move the material to be joined at a predetermined speed with respect to the fixing jig and the joining device. According to this apparatus, it is possible to reliably provide a cylinder having a beautiful surface finish of various shapes by friction stir welding, and to effectively process the reaction force of pressing applied to the tool. It is possible to reduce the size and weight.

Further, according to the manufacturing apparatus of the present invention, in the apparatus for manufacturing a cylinder using friction stir welding according to claim 10, the joining apparatus and the fixing jig are replaced with the means for feeding the surface to be joined. And a means for feeding a surface to be joined which can be moved at a predetermined speed with respect to the material to be joined (claim 11). According to this, the work space can be significantly reduced.

According to a twelfth aspect of the present invention, there is provided a manufacturing apparatus for a cylinder utilizing friction stir welding according to the tenth aspect, wherein (a) the material to be welded is placed at a predetermined position instead of the fixing jig. A fixing jig for fixing a member formed into a cylindrical body by abutting the members from the outside of the material to be joined, provided in accordance with a length of the cylindrical member; In place of the means, there is provided a means for feeding a surface to be bonded, which can move only the bonding device at a predetermined speed with respect to the material to be bonded and the fixing jig. According to this, the friction stir welding can be reliably performed, and the operation of the welding device is facilitated, so that the device has a simple structure.

Further, according to the present invention, there is provided an apparatus for manufacturing a cylinder using friction stir welding as set forth in any one of claims 10 to 12, wherein: A cylindrical body having an arbitrary cross-sectional shape is made of two materials having a shape obtained by dividing a cylindrical body having a cross-sectional shape into two in parallel with the axial direction thereof, and laminating the materials. (B)
The said joining apparatus has two said tools, The reaction force of the press applied to one tool is received by the other tool in the inner surface of the opposite side of a cylinder or a cylindrical body (Claim 13). ). According to this device, it is possible to reliably provide cylinders having various cross-sectional shapes by bonding the materials to be joined together.

According to a tenth aspect of the present invention, there is provided a cylinder manufacturing apparatus utilizing friction stir welding, wherein the material to be welded is a band material, and the band material is sequentially spirally wound. (Claim 14), or the material to be joined is a plate material, and the plate material is sequentially wound, thereby forming an arbitrary diameter spiral tube. A tubular body that is a suture tube can be formed (claim 15). According to this device, spiral tubes and suture tubes having various diameters and lengths can be reliably provided.

According to another aspect of the present invention, there is provided an apparatus for manufacturing a cylinder using friction stir welding, wherein one end face of one end of a material to be welded, which is two hollow pipes having a predetermined diameter, is abutted with each other. An apparatus for producing a cylinder using friction stir welding in which a joint is formed by sequentially friction joining the surfaces to be joined, which are abutting portions, to produce a cylinder. A fixed leg for fixing a cylindrical body formed by abutting at a position, wherein the fixed leg has rolling means or sliding means at a contact portion with the material to be joined, and a fixed force Means for pressing against the material to be joined with
A fixing jig installed outside the material to be joined,
(B) A tool for performing friction stir welding having a friction pin and a surface pressing portion at the root thereof, a joining arm having means for pressing the tool against the surface to be joined with a predetermined force, and rotating the friction pin at a predetermined rotation speed. Driving means for rotating with
A reaction force receiving portion for receiving a reaction force of pressing applied to the tool on the cylindrical body or another inner surface of the cylinder, and a rolling means or a sliding means at a contact portion with the material to be joined, and (C) rotating the workpiece at a predetermined speed with respect to the fixing jig and the bonding apparatus. Means for feeding the surface to be joined. According to this device, the cylinders to be joined can be securely joined to each other, and a long cylinder can be easily manufactured.

Further, the manufacturing apparatus of the present invention is characterized in that
The apparatus for manufacturing a cylinder using friction stir welding according to any one of claims 11 or 13 to 16, wherein the cylinder is provided at a position facing the tool with the material to be welded interposed therebetween, A backing of a joint having a rolling means or a sliding means is provided at a contact portion with the material to be joined (claim 17). Thereby, even when the strength of the material to be welded is insufficient, the cylinder can be reliably provided by friction stir welding.

[0021] In the manufacturing apparatus of the present invention, the backing moves together with the tool in the cylindrical manufacturing apparatus utilizing friction stir welding according to claim 17 (claim 18). Thereby, even if the strength of the material to be joined is insufficient, cylinders of various lengths can be reliably provided.

Further, the apparatus according to the present invention may be arranged as described in any one of claims 10, 11 and 13 to 18.
In the cylinder manufacturing apparatus using friction stir welding described in the above item, a part or the whole of the fixed leg, the joining arm, the guide leg, and the supporting leg supporting the backing has an expandable / contractible means. (Claim 19). According to this device, cylinders having various cross-sectional shapes and diameters can be reliably manufactured.

According to a twentieth aspect of the present invention, in the cylinder manufacturing apparatus utilizing friction stir welding according to any one of the twelfth and thirteenth aspects, the material to be welded is attached to the tool. It has a backing of a fixed joint provided at a position facing and sandwiching the tubular body and provided according to the length of the tubular body. According to this device, the cylinder can be reliably manufactured, and the maintenance of the device is facilitated. In addition, the backing makes it possible to manufacture the cylinder from a thin material.

Finally, the manufacturing apparatus of the present invention is characterized in that
The apparatus for manufacturing a cylinder using friction stir welding according to any one of Claims 13 and 20, wherein a part or all of the joining arm and the guide legs of the joining device are extensible. (Claim 21). According to this device, cylinders having various cross-sectional shapes and diameters can be reliably manufactured.

[0025]

Embodiments of the present invention will be described with reference to the drawings.

First Embodiment First, a first embodiment of the present invention will be described.
FIG. 1 is a front view showing a main part of the manufacture of a tube according to the first embodiment of the present invention. FIG. 2 is a diagram illustrating a welding device that performs friction stir welding in the first embodiment. FIG.
FIG. 4 is a diagram showing a power transmission unit for rotating a friction pin. FIG. 4 is a perspective view showing the production of a tube (laminated tube) according to a first variation in the first embodiment. FIG. 5 is a perspective view illustrating the manufacture of a tube (spiral tube) according to the second variation of the first embodiment. FIG. 6 is a perspective view illustrating the manufacture of a tube (suture tube) according to a third variation of the first embodiment. FIG.
FIG. 7 is a view showing a tube manufacturing apparatus according to a fourth variation of the first embodiment, showing an example in which the present invention is used for manufacturing a crane boom.

In the manufacturing method according to the first embodiment of the present invention, a material 1 to be joined having a predetermined shape is abutted at a predetermined position to form a cylindrical body; And a step of sequentially friction stir welding the surfaces 3.

The step of forming the material to be joined 1 into a cylindrical body is a method of bonding a plurality of materials having arbitrary cross-sectional shapes as shown in FIG. 1 or FIG. 4 to form a cylindrical body.
The method used when manufacturing a spiral tube by spirally winding a band material as shown in FIG. 5 or the method used when manufacturing a suture tube by winding a plate material as shown in FIG. There is no problem. The material to be joined 1 has various cross-sectional shapes such as a semicircle, a U-shape, and a U-shape as long as it can form a cylindrical body as described above. It can be a strip or a plate. Therefore, the cross section of a cylinder manufactured from these materials to be joined has a polygonal shape such as a circle, an ellipse, a square, a hexagon, and various other cross sections. Here, the surfaces where the materials to be joined abut each other need to be smooth, and it is not preferable that a large gap is formed in the surfaces to be joined 3 when the materials to be joined are abutted at predetermined positions. The surface 3 to be joined needs to be flat enough to press at least the tool 21 'for performing friction stir welding, but there may be some unevenness or a curved surface. Various materials such as an aluminum alloy can be used for the material 1 to be joined. In particular, a metal having a very low melting point, such as an aluminum alloy, is suitable for the joining.

Next, in the step of performing friction stir welding of the surfaces 3 to be joined, the tool 21 ′ for performing friction stir welding includes a friction pin 21 a made of tool steel and a surface pressing portion 21 b.
The surface pressing portion 21b is formed of a cylindrical body having a concave surface in contact with the material 1 to be joined. Although not shown, a small screw-shaped friction stirrer blade is formed around the friction pin. The friction pin rotates at a rotation speed of 500 to 15000 rpm, is pushed until the surface pressing portion 21b contacts the surface 3 to be joined, and is moved along the joining line 2 at a relative speed of 0.005 to 2 m / min. The force for pushing the tool varies depending on the material of the material to be joined and the shape of the friction pin, but is about 10 to 2000 kgf.
Due to the rotation of the friction pin 21a, the material 1 to be joined near the friction pin is heated by the frictional heat, plasticized, and fluidized. The material to be welded in the vicinity of the friction pin fluidized by the frictional heat as described above is given a certain restriction on the flow in the surface direction by the surface pressing portion 21b of the tool 21 ', so that the material to be welded from the vicinity of the surface to be welded to the outside Spattering is prevented and the materials are sufficiently stirred and mixed in a fluidized state inside the material to be joined. As a result, after the friction pins have passed and been cooled, the materials to be joined are integrated and firmly joined. Further, the surface of the portion where the friction stir welding has been performed is flat and has a certain width because the surface is pressed by the surface pressing portion. Therefore, there is no raised weld bead unlike conventional arc welding.

Here, friction stir welding is performed from the inner surface of the cylindrical body. By doing so, it is possible to manufacture a beautiful cylinder in which the joining line or the conventional welding bead is not visible on the surface. As described above, the friction pin 21 is attached to the tool 21 '.
A large pressure will be applied to push a. Therefore, how to receive the reaction force of the pressing applied to the tool is a problem. However, as shown in FIGS. 1, 4, 5 and 6, the opposite surface of the cylindrical body or another surface is used. The problem is solved by receiving it.

In the joining step, means for fixing the formed tubular body is necessary. In particular, in order to prevent the joining surface 3 of the joined joining material 1 from being opened by the friction pin 21a, the joining member is required. It is necessary to strongly press the joining material from the surroundings.

In the present invention, a cylinder is manufactured by sequentially friction stir welding the surfaces 3 to be welded, and a method for performing the sequential welding (feeding means of the surfaces to be welded) is a tool 21.
', Etc., are fixed, and only the material to be joined is moved back and forth along the joining line 2, whereby cylinders having various lengths can be manufactured. In this case, as described in the third aspect, if the workpiece 1 is fixed and the tool 21 ′ is moved back and forth along the welding line 2, it is possible to save the working space. Become.

Next, a tube manufacturing apparatus according to the first embodiment will be described. The cylinder manufacturing apparatus utilizing friction stir welding according to the present invention includes means for abutting materials to be joined in a predetermined shape at predetermined positions to form a cylindrical body, and forming the material into a cylindrical body as shown in FIG. A fixing jig 10 as a means for fixing the butted workpieces 1 at predetermined positions, a welding apparatus 20 for performing friction stir welding from the inside of the workpieces 1, and the back of the workpiece surface 3 if necessary. It consists of a contact 31 and a means for feeding a portion to be joined which can move the surface 3 to be joined at a predetermined speed with respect to the joining device.

The means for forming the material to be joined 1 into a cylindrical body may be a means for laminating a plurality of materials having an arbitrary cross-sectional shape as described above to form a cylindrical body (FIG. 4).
A means used for manufacturing a spiral tube (FIG. 5) by spirally winding a band material, or a means used for manufacturing a suture tube (FIG. 6) by winding a plate material. No problem. Further, the material and cross-sectional shape of the material 1 to be joined, the characteristics of the surface where the materials to be joined abut each other, and the like are as described above.

The fixing jig 10 which is installed outside the material 1 to be joined and fixes the cylindrical body formed by the above-described means includes a fixing leg 1
1, which serves to maintain the shape of the formed cylindrical body and prevent the surface 3 to be joined from being opened by the friction pin 21a during friction stir welding. This fixed leg 1
1 is a rolling means or a sliding means 11a provided on a contact surface with a material to be joined.
Having. The rolling means and the like are not limited to specific ones as long as they can reduce friction between the members to be joined, such as wheels, caterpillars (registered trademark of Caterpillar Corporation, USA), and rollers. This makes it possible to cope with workpieces of various lengths, and can reduce the labor for attaching and detaching the fixing jig 10 even when manufacturing a long tube. Further, if the fixing leg 11 is made expandable and contractable, it is possible to cope with various materials having different cross-sectional shapes and sizes. In addition, when a plurality of fixed legs 11 are adjacent to each other, if the distance between the fixed legs 11 can be adjusted,
Further, it is possible to cope with materials to be joined having various cross-sectional shapes and diameters. Also, a mechanism 11c for swinging the head on this leg
Is provided, the workpiece 1 can be fixed with a more uniform force. If a mechanism such as a ratchet mechanism that can adjust the swing angle is provided in the swing mechanism, the workpieces can be fixed with a more uniform force. This fixed leg 11
Is preferably located outside the portion where the friction stir welding is performed.

The main configuration of the welding device 20 installed inside the workpiece 1 and performing friction stir welding from the inner surface of the tubular body performs friction stir welding as shown in FIGS. 2, 5 and 6. A joint arm 21 and a guide leg 22 for guiding the joint arm 21 to a joint line or a reaction force receiving portion 23 also serving as a guide leg. 1)
The joining arm 21 includes a surface holding portion 21b, a friction pin 21a.
And a pressing ram 21c for pressing these against the surface 3 to be joined. The friction pin 21a rotates at a high speed, and is pressed by the pressing ram 21c together with the surface pressing portion 21b against the surface 3 to be joined with strong pressure, so that friction stir welding of the surface to be joined is performed. The number of tools 21 'is preferably provided in accordance with the number of surfaces to be joined, such as one if the surface to be joined is one, and two if there are two surfaces to be joined, from the viewpoint of work efficiency. When two tools 21 'are provided, they also serve as reaction force receiving portions of tools on opposite sides.
The friction pin 21a needs to have at least abrasion resistance. The diameter of the friction pin is appropriately selected depending on the thickness and the material of the material to be joined. The length of the friction pin varies depending on the number of rotations, the joining speed, and the like, but is equal to or slightly shorter than the thickness of the material to be joined (1% to 10% of the plate thickness).
% Is shorter). With such a friction pin,
A smooth and beautiful finish with no traces on the outer surface of the product. An electric motor is suitable as a driving means for rotating the friction pin. FIG. 3A shows an example in which power is transmitted using a motor 21e and a gear 21f, and a power source is a rotary shaft. It is good to use when it is located relatively far from 21d. FIG. 3B shows an example in which power is transmitted using the belt 21g, and FIG.
Is an example in which power is transmitted using a spur gear. Note that the power transmission means is not limited to these examples. As a means for pressing the tool 21 ′ against the surface 3 to be joined, a spring, a well-known mechanical mechanism, a cylinder using a fluid, or the like can be used. 2) The guide legs 22
Together with the fixing jig 10 installed outside the material to be joined, the tool 21 'plays a role in assisting the correct positioning of the tool on the surface to be joined. The surface has rolling means or sliding means 22a.
Thereby, the surface 3 to be joined can be moved smoothly. If this guide leg is made to be able to expand and contract similarly to the fixed leg, it is possible to cope with materials to be joined having various diameters. 5 and 6, when the joint arm 21 and the reaction force receiving portion 23 which also serves as a guide leg are installed at opposing positions, the tool 2
Since the reaction force of the load applied to 1 'can be received by the reaction force receiving portion 23 also serving as a guide leg, it is not necessary to increase the rigidity of the device, and the joining device can be reduced in size and weight. Further, the number of the guide legs 22 is set to a considerable number as necessary. Further, if the joining arm 21 and the guide leg 22 are made extendable and contractable like the fixed leg 11, it is possible to cope with the workpieces 1 having various cross-sectional shapes and different sizes. Although illustration is omitted, in order to guide the guide legs 22 reliably, it is necessary to temporarily provide guide rails for the guide legs in the cylinder. However, the inner surface shape of the cylinder and the rotation of the guide legs are required. This is unnecessary when the shape of the moving means or the sliding means can provide reliable guidance.
It is not necessary if the movement of the cylinder can be supported from outside the cylinder.

The backing 31 can be omitted when the strength of the material 1 to be joined is high, but is essential when the strength of the material to be joined is insufficient. This backing can also cope with workpieces of various lengths by providing rolling means 31a such as a caterpillar on the contact surface with the workpiece. Further, if the supporting leg 31b of the backing is made to be able to expand and contract similarly to the fixed leg 11, etc., it becomes possible to cope with materials to be joined having various diameters.

The apparatus of the present invention has a means for feeding a portion to be joined, and moves the material 1 to be joined back and forth along the joining line 2 with respect to the fixing jig 10, the joining device 20 and the backing 31. Thereby, cylindrical bodies having various lengths can be manufactured. As the feeding means, any suitable known means may be used as long as the means moves the cylindrical body in the longitudinal direction. The feeding means may be formed by using the driving rolling means or the caterpillars as the 11a, 31a, and 22a. The means may also be used.

As described in claim 11,
A work space can be saved by fixing the workpiece 1 and moving the fixing jig 10, the joining device 20, and the backing 31 back and forth along the joining line 2. Means 2 for moving or fixing the joining jig 20
As method 4, there is a method of pulling using a wire or a shaft.

In the present embodiment, the production of a cylinder by several kinds of variations is conceivable. Hereinafter, the invention of the four variations and the crane boom material manufactured in the present embodiment will be described.

First Variation First, the first variation will be described.
In one embodiment, as shown in FIG. 4, a material to be joined 1 is formed into a cylindrical body having any desired cross-sectional shape in parallel with its axial direction.
Friction stir welding in which the two workpieces 1 are bonded to each other, and the bonded portions are sequentially friction stir welded from the inside to produce a cylinder having an arbitrary cross-sectional shape. The present invention relates to the manufacture of a cylinder using the same.

In the step of forming the material 1 to be joined into a tubular body, two tubular materials (in this embodiment, extruded aluminum alloy) having an arbitrary cross-sectional shape are bonded to form a tubular body. Will use the method. The characteristics of the material to be joined 1 and the like are the same as in the case of the basic mode of the first embodiment. In particular, as shown in FIG. 1 or FIG. Materials to be joined having various cross-sectional shapes can be used as long as they can form a cylindrical body having the same. However, it is necessary that at least the fixing jig 20 be accommodated in the cylindrical body.

In the step of performing friction stir welding of the surfaces 3 to be welded, two tools 21 ′ are used, but their characteristics may be the same as those described above. Here, one tool 2
In the other tool 21 ', the reaction force of the pressing applied to 1' is
It is preferable to adopt a configuration in which the cylindrical member is received on another surface. In addition, 2
The surfaces 3 to be joined need to be parallel to each other. For example, when the cross-sectional shape of the inner surface of the formed cylindrical body is triangular, the surfaces to be joined are not parallel to each other, so that the reaction force of pressing on one tool 21 ′ is reduced by the other tool 21 ′. It cannot be received only.

In the joining step, means for fixing the formed tubular body is required, as in the case of the basic mode of the first embodiment.

The means for feeding the surfaces to be joined may be a method of moving only the joined materials 1 in the same manner as in the basic mode of the first embodiment, or may be a method in which the joined materials 1 are fixed. A method of moving a consolidation device or the like may be used.

Next, an apparatus used in this variation will be described. The configuration of this device is the same as that of the basic mode of the first embodiment, but the main points will be described below.

The means to be formed into a cylindrical body has a shape obtained by dividing a cylindrical body having an arbitrary cross-sectional shape intended for the material 1 to be joined into two parallel to the axial direction as shown in FIG. This is a means for bonding the two materials 1 to be joined together. The fixing jig 10 plays a role of pressing down the workpiece 1 bonded from the outer surface of the workpiece 1 formed in the cylindrical body and preventing the friction surface 21 from opening the workpiece 3. The joining apparatus 20 is characterized in that it has two tools 21 '. If the two tools 21 'are installed at opposing positions as shown in FIG. 2, the reaction force of the load (pressing) applied to one tool 21' can be received by the other tool 21 ', and the joining device It is not necessary to increase the rigidity of the device 20, and the device can be downsized. The backing 31 of the surface 3 to be joined is provided on the back side (outer surface of the cylindrical body) of the pair of tools 21 ′ as necessary, sandwiching the material 1 to be joined. The backing also plays a role of fixing the workpiece 1 together with the fixing legs 11 and the like. The means for feeding the surface to be bonded 3 is the bonded material 1 to be bonded.
It may be one that moves only, or one that fixes the bonded materials 1 and moves the bonding device 20 or the like.

Second Variation Next, a second variation will be described. In the first embodiment, a strip material to be joined 1 is sequentially spirally wound as shown in FIG. The present invention relates to the production of a cylinder using friction stir welding in which the surfaces 3 to be joined, which are butted portions, are sequentially friction stir welded to produce a spiral tube having an arbitrary diameter.

The step of forming the material to be joined 1 into a cylindrical body may be a means used when manufacturing a usual spiral tube. The band, which is the material 1 to be joined, is not limited in its length, width, thickness, etc., as long as it can produce a spiral tube. Other characteristics of the material to be joined 1 and the like are the same as those in the basic mode of the first embodiment.

In the step of performing friction stir welding of the surfaces 3 to be joined, only one tool 21 ′ is used since there is only one surface 3 to be joined. It is preferable that the reaction force of the pressing applied thereto is received by a reaction force receiving portion 23 serving also as a guide leg located on the opposite side of the joining arm 21. In FIG. 5, the number of the guide legs is one. However, if the number of the guide legs is plural, the reaction force of pressing can be dispersed and received, and the shape of the cylindrical body can be more easily maintained.

In the joining step, the means for fixing the formed cylindrical body is almost the same as that of the first variation. However, in this variation, the surface to be joined 3 is also provided in the longitudinal direction of the cylindrical body. Therefore, simply pressing the workpiece 1 is not sufficient.

Unlike the first variation, the means for feeding the surface to be joined 3 advances while being spirally wound, so that only the material to be joined 1 is preferably moved. . In this example, the guide leg and reaction force receiving portion 2
Since it is difficult to accurately guide the joining device 20 along the joining line by using only 3, the joining device 20 is reliably supported from the outside of the cylindrical body by the holding means 24.

Next, an apparatus used in this variation will be described. The configuration of this device is the same as that of the basic mode of the first embodiment, but the main points will be described below. Means to be formed in the cylindrical body is, as shown in FIG.
This method is used when spiral bands are sequentially wound in a spiral manner to produce a spiral tube. The fixing jig 10 and the joining device 20 have the specifications described in the manufacturing method in this variation. As in the first variation, the backing 31 is required when joining the material 1 having low strength, and is provided on the back side of the tool 21 ′ with the material 1 sandwiched therebetween. The backing 31 has a greater effect of preventing the joined surface 3 from opening than the first variation. As described in the manufacturing method according to the present variation, only the material 1 to be joined is moved by spirally winding the member to be joined. In this variation, the fixed legs 11,
The wheels and the like located at the respective tips of the guide legs 22 and the support legs of the backing 31 advance while rotating the cylindrical body. Therefore, it is desirable to direct the wheels and the like in an oblique direction, that is, in parallel with the joining line 2. Good.

Third Variation A third variation will be described. In the first embodiment, a plate material as a material 1 to be joined is sequentially wound as shown in FIG. The present invention relates to the manufacture of a cylinder using friction stir welding in which welding surfaces 3 are sequentially friction stir welded to produce a suture tube having an arbitrary diameter.

The step of forming the material to be joined 1 into a tubular body may be a means used when manufacturing a normal suture tube.
The length, width, wall thickness, and the like of the plate material as the material to be joined 1 are not limited as long as a suture tube can be manufactured.
Other characteristics of the material to be joined 1 and the like are the same as those in the basic mode of the first embodiment.

In the step of performing friction stir welding of the surfaces 3 to be joined, the second surface for manufacturing a spiral pipe is used, for example, since only one tool 21 ′ is used because there is one surface 3 to be joined.
Is the same as the variation process.

In the joining step, the means for fixing the formed tubular body may be the same as in the first variation. Also, as in the second variation, since the material to be bonded 1 advances while being wound, it is preferable to employ a means for moving only the material to be bonded 1 as the means for feeding the surface to be bonded 3 as in the second variation. Even in this example, the guide leg and reaction force receiving portion 2
Since it is difficult to accurately guide the joining device 20 along the joining line by using only 3, the joining device 20 is reliably supported from the outside of the cylindrical body by the holding means 24.

Next, an apparatus used in this variation will be described. The configuration of this device is the same as that of the basic mode of the first embodiment, but the main points will be described below. As shown in FIG.
Is used in order to manufacture a suture tube by sequentially winding plate materials. The characteristics of the fixing jig 10 and the joining device 20 are the specifications described in the manufacturing method in this variation. The backing 31 is necessary when manufacturing a suture tube having a low strength. However, since the backing 31 also has an action of preventing the joined surface 3 from opening, the necessity of providing the backing is higher than in the case of the first embodiment. Is also big. As described in the manufacturing method in this variation, only the material to be joined is moved by winding the material to be joined 1 as described in the manufacturing method in this variation.

Fourth Variation A fourth variation will be described with reference to FIG. 7. In this variation, in the manufacturing apparatus of the first embodiment, a fixing jig and, if necessary, a backing are attached to the workpiece 1. The present invention relates to a manufacturing apparatus that fixes and moves only the joining device 20. Therefore, the characteristics of the materials to be joined are the same as those of the other variations.

The means for forming the cylindrical body is not particularly limited, but the means used for the first variation (laminated tube) is suitable. The fixing jig 12 plays the same role as that of the other variations, except that it has no rolling means at the contact portion with the material 1 to be joined. It is a fixed type provided. The joining device 20 is similar to the other variations. The backing 32 is provided as needed according to the strength of the material 1 to be joined, and plays the same role as that of the other variations, but differs greatly in the same manner as the fixing jig 12 of this variation. It is a fixed type provided according to the length. It is suitable that only the joining device 20 is moved as the means for feeding the surface 3 to be joined. The joining device 20 is preferably moved by pulling it with a wire or by connecting and pushing or pulling a shaft to the joining device 20. The moving speed is 0.005 to 2 m / min as described above.

(6) Crane boom material The crane boom material is manufactured by the method according to any one of claims 1 and 3,
In particular, the material to be joined 1 is an aluminum alloy formed by extrusion, and is provided by bonding the materials to be joined 1 and sequentially performing friction stir welding on the surfaces 3 to be joined, which are bonded portions. The product can be reduced in weight by using an aluminum alloy for the material 1 to be joined, and the weight of the crane can be significantly reduced as compared with a crane boom material such as steel. Further, since the crane boom material, which is a product, can have a cross-sectional shape other than a hexagon and a functionally effective shape, the crane boom can be made of aluminum.

Second Embodiment Next, a second embodiment of the present invention will be described.
FIG. 8 is a perspective view showing the manufacture (joining of the tubes) of the tubes in the second embodiment according to the present invention. FIG. 9 is a conceptual diagram of the overlap creation in the second embodiment. FIG. 10 is a diagram illustrating a tool used in the second embodiment.

In this embodiment, as shown in FIG. 8 (a), a step of abutting a cylinder as a material 1 to be joined and one end face of the cylinder to form a long tubular body, The present invention relates to the production of a cylinder in which the surfaces 3 to be joined, which are butted portions, are sequentially friction stir welded.

The step of forming the material 1 to be joined into a cylindrical body may be performed by simply holding the cylinder (hollow tube) against the cylinder (hollow tube), and is limited to a specific one. Never. However, before the two cylindrical bodies are brought into contact with each other, it is necessary to set a device 40 (to be described in detail later) in which the joining device 20 and the holding device 41 are integrated into one cylindrical body in advance. The length, diameter, thickness, etc., of the cylinder as the material to be joined 1 are not limited as long as the end faces on one side thereof can be abutted to each other to form a long cylindrical body. However,
It is desirable that the shapes of the end faces for joining the two cylinders, particularly the shapes of the butted portions, be the same. In addition, the characteristics of the material to be joined 1 and the surface to be joined 3 are the same as those in the first embodiment.

In the step of performing friction stir welding of the surfaces 3 to be joined, although the number of the surfaces 3 to be joined (joining line 2) is one, a plurality of tools 21 ′ (joining arms 21) may be provided. In addition, when joining a pipe | tube and a pipe | tube, the closed joining line W in which the starting point W1 and the end point W2 which perform joining overlaps.
(FIG. 9 (a)), but when the friction pin 21a is pulled out of the workpiece 1 at the end point of joining, as shown in FIG. 11 (c), after the friction pin is pulled out, An inverted hat-shaped mark is formed. Therefore, in this case, a mark remains on the product cylinder, which is not preferable in terms of airtightness. However, this disadvantage can be dealt with by gradually pulling out the friction pin 21a when forming the overlap OL so that the joining depth becomes gradually smaller. This pulling-out timing should be started immediately before forming the overlap OL or immediately after forming the overlap OL (FIG. 9).
(C)). In the first embodiment, similarly, a trace 5 of the inverted hat-shaped friction pin from which the friction pin has been pulled out remains in the cylinder, but if this portion is cut after the joining, a problem occurs in the quality of the product. Never. Also, the tool shown in FIG. 10 is suitable for the tool 21 ′ (details will be described later).

Here, similarly to the first embodiment, the reaction force of the pressing applied to the tool 21 ′ is, when one tool 21 ′ is provided, one or two or more guides located in the opposite direction of the joining arm 21. When two tools 21 'are received by the legs, the pressure applied to one tool 21' is preferably received by the other tool 21 '. When the number of tools 21 ′ is three or more, by arranging the tools 21 ′ in a so-called star shape, the pressure applied to each can be dispersed and received, which is suitable for manufacturing a cylinder having a low strength.

The means for fixing the cylindrical body to be joined is as follows:
Unlike the first embodiment, both ends of the tubular body may be pressed. The means for rotating the joining device 20 is suitable as the means for feeding the joined surface.

Next, an apparatus for manufacturing a cylinder according to the second embodiment will be described. The configuration of this device is the same as that of the first embodiment, but the main points will be described below. The means for forming the cylindrical body serves as a means for joining the cylinders as described in the manufacturing method in the present embodiment as shown in FIG. The fixing jig 10 is pressed from both end surfaces of the cylindrical body as described in the manufacturing method in the present embodiment. The device 40 includes a holding device 41 and a joining device 20. The holding device 41 is a rod for taking out the device 40 after the holding leg 41a is contracted by releasing the air pressure of the holding leg 41a after the joining of the holding leg 41a and the shaft 42 to the outer periphery with three or more air pressures, etc. 43. The joining device 20 is attached to the shaft 42 so as to rotate about the shaft 42 by itself. A tool 21 ′ is fixed to the joining device 20 so as to be able to expand and contract like the other examples. Incidentally, in order to make the trace 5 of the friction pin omission inconspicuous, when forming the overlap OL, the friction pin 21a is gradually pulled out so as to gradually reduce the joining depth. This can be realized by gradually shrinking the arm 21 at the time of forming the overlap OL. However, in order to form a better overlap OL, the friction pin 21 is kept in contact with the surface pressing portion 21b against the surface 3 to be joined.
Means for extracting only a may be provided in the tool 21 '. The tool shown in FIG. 10 is suitable for the tool 21 '(details will be described later). The backing 31 is necessary when the strength of the material 1 to be joined is low as in the first embodiment. However, when the backing is provided, unlike the first embodiment, the joining device 20 extends in the circumferential direction of the cylindrical body. Since the tool (ie, the tool 21 ') rotates, the backing 31 also follows the movement.

Here, a description will be given of a tool 21 'suitable for forming the overlap OL in which the joining depth is gradually reduced. As shown in FIG. 10 (a), the tool 21 'includes a rotating shaft 21d and a friction pin 21a directly connected coaxially thereto.
And a movable surface pressing portion 21b 'which is a cylindrical body fitted into the friction pin and concavely curved to the bottom. A plurality of small screw-like friction stir blades 21w are formed on the peripheral surface of the friction pin 21a. These characteristics are the same as the characteristics of the tool 21 'used in the first embodiment, except that the surface holding portion is movable as described below. In the tool 21 ', a pair of concave narrow grooves 21m are formed on the peripheral surface of the friction pin 21a along the longitudinal direction. On the other hand, a pair of ridges 21n is provided on the movable surface pressing portion 21b 'at a position corresponding to the narrow groove 21m. For this reason, the movable surface pressing portion 21b 'moves vertically (in the direction along the rotation axis) with respect to the friction pin 21a.
It is slidable and movable. The movable surface pressing portion 21b 'is always pressed toward the distal end of the friction pin 21a by a coil-shaped spring 21s wound around the thin shaft portion 21d' of the rotating shaft 21d (FIG. 10 (a)).

Next, a description will be given of the formation of the overlap OL in which the joining depth is gradually reduced by using the tool 21 'with reference to FIG. First, the joining of the joined surfaces 3 from the starting point W1 is performed as usual by the tool 21 '. Next, when the tool 21 'comes to a position immediately before reaching the start point W1 of the joining line W, joining is continued while gradually shrinking the joining arm 21 to which the tool 21' is attached. Eventually, the friction pin 21a is moved to the starting point W1.
And after the required length L has passed, it is separated from the surface 3 to be joined. The position is the end point W2, and an overlap OL for the length L through which the tool 21 'has passed twice is formed between the start point W1 and the end point W2. In the portion other than the overlap OL portion, the stirring portion has a constant depth as a whole, whereas in the overlap OL portion, the start point W1 to the end point W
In response to the pulling-out speed of the friction pin 21a, the agitating section gradually curves toward 2 and the agitating section gradually becomes shallower (FIG. 9).
(C)). Note that the pulling start position may be after the start point W1 has been passed, and even in this case, the same overlap OL as described above can be formed. During this lifting, the movable surface pressing portion 21b 'of the tool 21' remains on the surface 3 to be joined because the pressing force of the spring 21s is applied. In this case, the pressing force of the spring 21s is sequentially reduced by the rise of the joining arm 21, but if a spring having appropriate characteristics is used, the pressing of the surface presser can be sufficiently maintained. As a result, as shown by P in FIG.
Is formed, and at the time of forming the overlap, the fluidized material 1 to be splattered or a good bonded structure (stirring portion 4) free of air and having no pores.

[0071]

According to the present invention, unlike extrusion, cylindrical bodies having various cross-sectional shapes can be manufactured at low cost. Also, MIG
The finish is clean compared to joining by fusion welding such as welding, and post-processing of the joined portion is not required or can be greatly simplified.

Because of the friction stir welding, the joints of the products are beautiful. In particular, by making the size of the friction pin 21a slightly smaller than the thickness of the material to be joined, it is possible to perform a smooth finish without leaving any marks on the outer surface. In addition, friction stir welding has a lower processing temperature than MIG welding or the like, and has fewer defects at the joint.

Since the work is performed from the inner surface, the reaction force of the pressing (load) applied to the tool can be received on the opposite surface of the cylinder,
Thereby, the reaction force of the pressing can be effectively utilized, and the joining device 20 can be reduced in size and weight. Thereby, it becomes possible to manufacture a tube having a complicated shape or a tube having a small diameter.

In the friction stir welding by the apparatus of the present invention, since the material to be joined is pressed against the fixing jig from the inside of the tube, a product with high dimensional accuracy can be manufactured by adjusting the dimensions of the fixing jig. Further, when a rolled plate is used as a material to be joined, a product having good dimensional accuracy can be easily manufactured because the thickness variation is small compared to extrusion.

When joining a cylinder to a cylinder,
A closed joint line where the start point and the end point of the joint overlap each other is formed. However, when the overlap OL is formed, only the friction pin 21a is gradually pressed while the movable surface pressing portion 21b 'is pressed against the surface to be joined. By pulling it out, it is possible to perform joining with no noticeable trace of the friction pin coming off, thereby providing a product excellent in strength and airtightness.

Further, the crane boom material provided by the present invention is solid and can be reduced in weight as compared with a crane boom material made of steel.

[Brief description of the drawings]

FIG. 1 is a front view showing a main part of manufacturing a cylinder in a first embodiment according to the present invention.

FIG. 2 is a diagram illustrating a welding device that performs friction stir welding in the first embodiment. (a) shows the side and (b) shows the bottom.

FIG. 3 is a diagram showing a power transmission unit for rotating a friction pin. (a) shows power transmission by a long drive shaft, (b) shows power transmission by a belt, and (c) shows direct direct drive by gears.

FIG. 4 is a perspective view showing the manufacture of a tube (laminated tube) according to a first variation in the first embodiment.

FIG. 5 is a perspective view showing the manufacture of a cylinder (spiral tube) according to a second variation in the first embodiment.

FIG. 6 is a perspective view showing the manufacture of a tube (suture tube) according to a third variation of the first embodiment.

FIG. 7 is a view showing a tube manufacturing apparatus according to a fourth variation of the first embodiment, showing an example in which the present invention is used for manufacturing a crane boom. (A) is a diagram in which the joining device is accommodated inside a tubular body, and (b) is a diagram in which a material to be joined is formed in a tubular body and a fixing jig and a backing are arranged at predetermined positions.

FIG. 8 is a perspective view showing the manufacture of a tube (joint between tubes) in a second embodiment according to the present invention.

FIG. 9 is a conceptual diagram of overlap creation in the second embodiment. (A) shows the joining line W formed in the circumferential direction of the cylinder and the overlap OL portion, (b) is a view of the joining portion of the overlap OL portion viewed from above,
(C) is a cross-sectional view of the overlap OL portion along the CC plane.

FIG. 10 is a view showing a tool used in the second embodiment. (A) is a cross-sectional view at the front, (b) is B
It is sectional drawing in the -B plane.

FIG. 11 is a view showing general friction stir welding.
(A) is sectional drawing with respect to the advancing direction of a friction pin,
(B) is a sectional side view of the joining by the friction pin, (c)
FIG. 4 is a cross-sectional view showing a trace of a friction pin.

[Explanation of symbols]

 1, 1 '; material to be welded 2; welding line 3; surface to be welded 4; stirrer 5; trace of friction pin 10; fixing jig 11; Pressing ram 11c; Neck swing mechanism 12; Fixing jig (fixed type) 20; Joining device 21; Joining arm 21 '; Tool 21a; Friction pin 21b; Surface holding portion 21b'; Movable surface holding portion 21c; 21d; rotating shaft 21d '; thin shaft portion 21e; motor 21f; gear 21g; belt 21m; narrow groove 21n; ridge 21s; spring 21w; friction stirrer blade 22; guide leg 22a; wheel 22a'; caterpillar 22b; 23; stress receiving portion 24; holding means (shaft) 31; backing (expandable) 31a; caterpillar 31b; support leg 32 for backing; backing (fixed) ) 40; 41; holding device 41a; retention legs 42; shaft 43, the rod W; joint line W1; start W2; end point L; length of the overlap portion OL; missing traces of friction pins in W2; overlap P

Claims (21)

[Claims] 1. A process in which materials to be joined having a predetermined shape are abutted at a predetermined position to form a cylindrical body, and a step in which the surfaces to be welded, which are abutting portions of the cylindrical body, are sequentially friction stir welded. (B) using a friction stir welding tool having a friction pin rotating at a predetermined number of revolutions and a surface holding portion at the base thereof, A) performing friction stir welding of the surface to be welded from the inner surface of the cylindrical body, and (c) receiving a reaction force of pressing applied to the tool on the other inner surface of the cylindrical body or the cylindrical body. A method for producing a cylinder using friction stir welding. 2. The method according to claim 1, wherein the material to be joined is an aluminum alloy. 3. The material to be joined is made of two materials having a shape obtained by dividing a cylindrical body having an arbitrary cross-sectional shape intended by the material into two parallel to the axial direction thereof. (B) the number of the tools is two, and the reaction force of pressing applied to one of the tools is the cylinder or the cylinder. And receiving by another tool on the opposite inner surface of the shape.
A method for manufacturing a cylinder using friction stir welding according to any one of the above items. 4. The method according to claim 1, wherein the material to be joined is a strip, and a tubular body that is a spiral tube having an arbitrary diameter can be formed by sequentially winding the strip in a spiral shape. A method for producing a cylinder using friction stir welding according to any one of claims 1 and 2. 5. The material to be joined is a plate, and a tubular body that is a suture tube having an arbitrary diameter can be formed by sequentially winding the plate. 3. A method for manufacturing a cylinder using friction stir welding according to claim 1. 6. The crane manufactured by the method of manufacturing a cylinder using friction stir welding according to claim 1, wherein the material to be welded is formed by extrusion of an aluminum alloy. Boom material. 7. A step of abutting one end surfaces of two members having a predetermined diameter, which are two cylinders having a predetermined diameter, to form a long cylindrical body, and a joining part being an abutting portion of the cylindrical body. A friction stir welding step of sequentially joining the surfaces, the method comprising: (a) performing friction stir welding of the surface to be joined from the inner surface of the cylindrical body. (B) using a friction pin which rotates at a predetermined number of revolutions and a tool for performing friction stir welding having a surface pressing portion at the root thereof; and (c) applying a reaction force of pressing applied to the tool to the cylindrical or cylindrical shape. A method for producing a cylinder using friction stir welding, wherein the cylinder is received on another inner surface of the body. 8. The method according to claim 7, wherein the number of the tools is two, and a reaction force of pressing applied to one of the tools is received by the other tool on the inner surface on the opposite side of the cylinder or the cylindrical body. Production method using friction stir welding. 9. When sequentially joining the surfaces to be joined formed in the circumferential direction of the cylindrical body by friction stir welding, a closed joining line is formed in which a starting point and an ending point of joining overlap, and 9. The friction stirrer according to claim 7, wherein when forming the overlap, the tool is sequentially pulled up so that the joining line is formed gradually shallower toward an end point. A method of manufacturing a cylinder using a junk joint. 10. A material to be joined having a predetermined shape is abutted at a predetermined position to form a cylindrical body, and the surfaces to be joined, which are abutted portions, are sequentially friction stir welded, and friction stir welding is used to manufacture a cylinder. (B) a fixing leg for fixing a material formed into a cylindrical body by abutting said materials to be joined at a predetermined position, wherein said fixing leg is provided at a contact portion with said material to be joined; With moving or sliding means,
Means for pressing the fixing leg against the material to be joined with a predetermined force, a fixing jig provided outside the material to be joined, (b) a friction pin having a friction pin and a surface pressing portion at its base. A joining arm having a tool for performing welding and a means for pressing the tool against the surface to be joined with a predetermined force, a driving means for rotating the friction pin at a predetermined number of rotations, and a counter-pressure applied to the tool. A reaction force receiving portion for receiving a force on the other inner surface of the cylindrical body or the cylinder, and a guide leg which has rolling means or sliding means at a contact portion with the material to be joined and guides the tool to the surface to be joined; (C) a means for feeding a surface to be joined which can move the material to be joined at a predetermined speed with respect to the fixing jig and the joining device; Characterized by consisting of A cylinder manufacturing device using friction stir welding. 11. The apparatus for manufacturing a cylinder using friction stir welding according to claim 10, wherein the joining device and the fixing jig are attached to the material to be joined in place of the means for feeding the surface to be joined. An apparatus for feeding a surface to be joined that can be moved at a predetermined speed. 12. The apparatus for manufacturing a cylinder using friction stir welding according to claim 10, wherein a material to be joined having a predetermined shape is butt-joined at a predetermined position to form a cylindrical body, and the butt-joining portion is formed. An apparatus for manufacturing a cylinder using friction stir welding in which a joining surface is sequentially friction stir welded to produce a cylinder,
(A) A fixing jig for fixing a material formed into a cylindrical body by abutting the materials to be joined at a predetermined position instead of the fixing jig from the outside of the material to be joined, wherein the length of the cylindrical body is (B) Instead of the means for feeding the surface to be bonded, only the bonding device can be moved at a predetermined speed with respect to the material to be bonded and the fixing jig. An apparatus for manufacturing a cylinder using friction stir welding, comprising: means for feeding a surface to be joined. 13. (a) The material to be joined is made of two materials having a shape obtained by dividing a cylindrical body having an arbitrary cross-sectional shape intended into two in parallel with the axial direction thereof. (B) the joining device has two tools, and the reaction force of pressing applied to one of the tools is The apparatus for manufacturing a cylinder using friction stir welding according to any one of claims 10 to 12, wherein the apparatus is received by another tool on the inner surface on the opposite side of the cylinder or the cylindrical body. 14. The method according to claim 1, wherein the material to be joined is a band material, and the band material is formed into a spiral tube having an arbitrary diameter by sequentially winding the band material spirally. An apparatus for manufacturing a cylinder using friction stir welding according to claim 10. 15. The method according to claim 1, wherein the material to be joined is a plate material, and a tubular body that is a suture tube having an arbitrary diameter can be formed by sequentially winding the plate material. An apparatus for manufacturing a cylinder using friction stir welding according to claim 10. 16. A long tubular body is formed by abutting one end surfaces of two workpieces, which are two hollow tubes having a predetermined diameter, to each other, and sequentially abuts the abutting surfaces, which are the abutting portions, to each other. A cylinder manufacturing apparatus utilizing friction stir welding for producing a cylinder by stirring and joining, (a) fixing for fixing a material formed by joining the materials to be joined at a predetermined position into a cylindrical body A leg having rolling means or sliding means at a contact portion with the material to be joined, and a means for pressing the fixed leg against the material to be joined with a predetermined force. Fixing jig installed outside the material (b)
A tool for performing friction stir welding having a friction pin and a surface pressing portion at the root thereof, a joining arm having means for pressing the tool against the surface to be joined with a predetermined force, and rotating the friction pin at a predetermined rotation speed A driving means for receiving the reaction force of pressing applied to the tool on the cylindrical body or the other inner surface of the cylinder, and a rolling means or a sliding means at a contact portion with the material to be joined, A joining device which is installed inside the material to be joined, comprising: a guide leg for guiding a tool to the surface to be joined; and (c) a predetermined speed with respect to the fixing jig and the joining device. An apparatus for manufacturing a cylinder using friction stir welding, comprising: means for feeding a surface to be welded, which can be rotated by means of a cylinder. 17. A backing of a joint portion provided at a position facing the tool with the material to be joined sandwiched therebetween and having a rolling means or a sliding means at a contact portion with the material to be joined. An apparatus for manufacturing a cylinder using friction stir welding according to any one of claims 10, 11 or 13 to 16. 18. The apparatus for manufacturing a cylinder using friction stir welding according to claim 17, wherein the backing moves together with the tool. 19. The fixing leg according to claim 10, wherein a part or all of the supporting leg for supporting the fixed leg, the joint arm, the guide leg and the backing has an extensible means. An apparatus for manufacturing a cylinder using friction stir welding according to any one of claims 13 to 18. 20. A backing for a fixed joint provided at a position facing the tool with the material to be joined sandwiched therebetween and provided in accordance with the length of the tubular body. An apparatus for producing a cylinder using friction stir welding according to any one of claims 12 and 13. 21. The connecting device according to claim 12, wherein a part or all of the joining arm and the guide leg of the joining device have a means that can be extended and contracted. Cylinder manufacturing equipment using friction stir welding.