JP4331036B2 - Friction stir welding equipment for hollow profile - Google Patents

Description

The present invention relates to a friction stir contact GoSo location of the hollow shape member, in particular, a plurality of face plates lying parallel opposite one another, it is integrally connected by a plurality of ribs extending between mutually facing surfaces in a plurality of hollow shape members made structures FSW, friction stir welding operation you simultaneously FSW plurality of butted portions of each surface plate between the plurality of hollow shape members are formed by butted together The present invention relates to a friction stir welding apparatus that is preferably used for the above.

  Conventionally, a hollow member having a structure in which a plurality of face plates facing and parallel to each other are integrally connected by a plurality of ribs extending between the opposing faces has been used for various applications. . For example, in such a hollow profile, two so-called double skin structures in which two face plates positioned parallel to each other are integrally connected by a plurality of ribs extending between the facing surfaces. 2. Description of the Related Art A hollow shape member made of an aluminum alloy having a surface structure is used for a side structure, a floor structure, a roof structure of a building, or the like such as a vehicle or an aircraft.

  By the way, in many cases, the width dimension of such a hollow shape member is limited since it is formed by extrusion molding. Therefore, in general, a plurality of such hollow shapes are abutted at end faces of corresponding face plates, and the abutting portions are joined to form a wide joined body (panel). It is used as a structure.

And in recent years, as a kind of butt joint method of such a plurality of hollow shapes, unlike arc welding or the like, the occurrence of joint defects such as blow holes and solidification cracks peculiar to fusion welding can be advantageously avoided. The friction stir welding method has been applied in part, but when butt-joining multiple hollow profiles, it is necessary to join all of the multiple butt sections formed in the facing direction of the face plate Therefore, in the conventional friction stir welding method for joining the plurality of butted portions one by one, not only the joining operation becomes complicated, but also when the plurality of butted portions formed in the opposing direction are separately friction stir welded. , contracts junction formed butt portion joined to the previously slightly flex slightly to the faceplate occurs, the Re their, there is a problem such distortion occurs in the bonding member finally obtained .

  Under such circumstances, a technique that can simplify the joining operation when butt-joining a plurality of hollow profiles by friction stir welding is proposed in Patent Document 1 below. That is, there, as a friction stir welding apparatus, a plurality of rotating jigs arranged coaxially at a predetermined distance from each other and coaxially arranged with the rotating jig so as to be positioned alternately with the rotating jig. Further, at least one backing member disposed between adjacent rotating jigs and a plurality of probes extending coaxially from the rotating jig toward the backing member side are friction stir welds provided in a fixed position. The device is used.

  For example, when butt-joining two of the hollow skins having a double skin structure in which the two face plates are opposed to each other in the vertical direction, first, the two hollow shapes are pushed at the end surfaces of the face plates. Together, two butted portions positioned opposite to each other in the vertical direction are formed. After that, the adjacent rotating jig and backing member are positioned between the opposing surfaces of the upper and lower face plates (between the opposing surfaces of the upper and lower butting parts), and the rotating jig is brought into contact with the upper surface of each abutting part. On the other hand, the backing member is brought into contact with at least the lower surface of the upper abutting portion, and the probe positioned between the rotating jig and the backing member is disposed so as to penetrate each abutting portion, The rotating jig, the backing member, and the probe are integrally rotated, and are moved relative to each abutting portion under such integral rotation. As a result, the two butted portions are simultaneously friction stir welded.

  According to such a friction stir welding technique, a plurality of butt portions can be joined at a time, and finally obtained by friction stir welding of butt portions formed to face each other at the same time. Generation | occurrence | production of the distortion in a conjugate | zygote can be eliminated or suppressed advantageously. In addition to the rotating jig, the backing member is also rotated integrally with the probe in contact with the abutting portion, and therefore, between the rotating jig and the upper surface of the abutting portion, and between the backing member and the lower surface of the abutting portion, Due to the frictional heat generated both in between, the entire butt portion is sufficiently plasticized, and the metals in the entire butt portion can be more sufficiently agitated. Therefore, the intended joined body can be obtained easily and efficiently with a sound structure with little distortion and sufficient joining strength.

  However, in such a conventional friction stir welding technique for hollow profiles, a rotating jig and a backing that are positioned so as to be adjacent to each other in the axial direction and are brought into contact with the lower surface and the upper surface of the facing butting portions. Since the member is provided in a fixed position with a predetermined interval with respect to the friction stir welding apparatus, for example, the distance between the face plates of the hollow profile member used for joining (to be opposed to each other) is formed. The distance between adjacent rotating jigs and backing members is equal to the distance between the face plates of the hollow shape members used for joining, for example, when obtaining multiple types of joined bodies having different distances between the butting parts). It is necessary to prepare a dedicated friction stir welding apparatus having a size according to the type according to the type of the target joined body, which is a great economic burden.

In addition, since the probe extending from the rotating jig is also provided at a fixed position with respect to the rotating jig, the length of such a probe cannot be changed. When obtaining multiple types of joined bodies with different thickness of the face plate of the hollow shape material used for joining, etc., when the thickness of the face plate, that is, the thickness of the butt portion is larger than the length of the probe In the entire butt portion, the metal in the portion where the probe cannot be penetrated cannot be sufficiently agitated, so that the joining becomes insufficient, and as a result, after the press work on the joined body, etc. At the time of processing, there is a risk that a bonding failure such as a so-called kissing bond occurs in the bonded portion .

  As a friction stir welding apparatus in which the probe is moved relative to the rotating jig in the axial direction, an apparatus disclosed in the following Patent Document 2 is known. The simplification of the friction stir welding operation of the hollow shape member having a plurality of butt portions to be achieved cannot be realized.

JP-A-11-347753 US Pat. No. 6,1997,745

Here, the present invention has been made in the background as described above, and the problem to be solved is that there are a plurality of kinds of different distances between the face plates of the hollow shape member to be joined. the conjugate, with less healthy structure and sufficient bonding strength distortion, easily and FSW method of hollow profile that can be obtained at a low cost and, a surface thickness of plate of the hollow shape member subjected to the joining advantageously Oite but a different type of conjugate, respectively, with a joint having healthy and sufficient strength without bonding defects such as kissing bond, the FSW how the hollow profile that can be obtained stably providing a friction stir welding apparatus of the hollow profile that can be used, it is an solving problems of that.

In the present invention, in order to solve the problems related to the friction stir welding apparatus for hollow profiles, the first aspect is that the upper and lower two parts facing each other in parallel are arranged. Two face plates are integrally connected by a plurality of ribs extending between the facing surfaces, and two of the hollow shape members are abutted with each other at the end surfaces of the corresponding face plates, and formed in the facing direction of the face plates. An apparatus for simultaneously friction stir welding the upper and lower two butted portions, and an annular plate-shaped shoulder portion having a shoulder surface brought into contact with the upper surface of the upper side plate in the upper butted portion A cylindrical first rotating jig provided at the lower end portion and having an inner hole penetrating in the axial direction, rotatable about the axis and movable in the axial direction, and a lower portion in the lower butt portion The top of the side plate An annular plate-shaped shoulder portion provided with a shoulder surface is provided at the lower end portion, and protrudes downward from the lower end opening portion of the inner hole of the first rotating jig, and is coaxial with the inner hole and A second rotating jig that is inserted and arranged so as to be relatively movable in the axial direction, is rotatable about the axis and is movable in the axial direction, and is coaxial from the center of the shoulder portion of the second rotating jig. The lower abutting portion is agitated by rotation around the axis of the projecting portion. The projecting portion is provided so as to project downward, and is rotatable about the axis and movable in the axial direction. A lower probe on which the joining operation is performed, an annular plate-shaped abutting portion whose upper surface is a backing surface brought into contact with the lower surface of the upper side plate in the upper butt portion, and a coaxial on the backing surface of the corresponding contacting portion A cylindrical insertion portion integrally formed, and the insertion portion is the first insertion portion. Coaxially inserted in the gap between the inner hole of the rotating jig and the insertion site of the second rotating jig inserted therein and disposed so as to be relatively movable in the axial direction, and rotatable around the axis; A backing member that is movable in the axial direction, and a base portion that is based on a rotation around the axis of the backing member, which is configured by a base side portion that is the contact portion side of the insertion portion of the backing member A hollow stirrer friction stir welding apparatus comprising: an upper probe that performs a friction stir welding operation of the upper butt portion by rotation of a side portion .

Moreover, in the second aspect of the friction stir welding apparatus for hollow profiles according to the present invention, the lower probe is provided integrally with the second rotating jig.

Furthermore, in the present invention, in order to solve the problem related to the friction stir welding apparatus for hollow profiles, the third aspect is that the second rotating jig is coaxially penetrated in the axial direction. A rotating rod is disposed so as to be rotatable relative to the axial direction, and the lower probe is formed at a portion of the rotating rod protruding downward from the shoulder portion of the second rotating jig. ing.

In the fourth aspect of the friction stir welding apparatus for hollow profile according to the present invention as described above, in the fourth aspect, an annular plate shape having an upper surface as a backing surface that is brought into contact with the lower surface of the lower surface plate in the lower butt portion. The rotating rod with the tip backing member integrally provided at the lower end portion is coaxially rotatable and relatively movable in the axial direction so as to penetrate the second rotating jig in the axial direction. The lower probe is configured at a base side portion of the rotating rod on the tip backing member side.

Moreover, in the fifth aspect of the friction stir welding apparatus for hollow profiles according to the present invention, the plurality of ribs in which the hollow profiles are parallel to each other and the two face plates positioned parallel to each other extend between the opposed surfaces. It is comprised by the aluminum alloy extrusion shape material of the double skin structure integrally connected by.

That is, in the first aspect of the friction stir welding apparatus for hollow profiles according to the present invention as described above, the hollow profiles having two face plates are brought into contact with each other to form in the opposing direction of the face plates. Since the two butted parts can be plasticized simultaneously and sufficiently by friction stir welding, the target joined body can be easily obtained with a sound structure with little distortion and sufficient joining strength. And it will be obtained efficiently.

In particular, the device according to the present invention is a hollow shape member in which the interval between the rotating jig and the backing member, which are positioned adjacent to each other in the facing direction of the face plate, is used for joining. The rotating jig and the backing member are moved close to each other so as to have a size corresponding to the distance between the face plates, that is, the distance between the facing portions adjacent to each other in the facing direction of the face plates. Since each of the butted portions is brought into contact with each other, for example, even when obtaining a plurality of types of joined bodies having different distances between the face plates of the hollow shape materials to be joined, one type of apparatus is used. Can be used for general purposes, whereby the interval between the rotating jig and the backing member positioned between the butted portions formed in the facing direction of the face plate is the same as that of the hollow shape member to be joined. Depending on the distance between face plates And the friction stir welding apparatus of dedicated that is dimensioned, is necessary to prepare only the type corresponding to the type of the bonded body of interest, it can be advantageously solved.

Therefore, according to the friction stir welding apparatus for hollow profiles according to the present invention as described above, a plurality of types of joined bodies having different distances between the face plates of the hollow profiles to be joined can be easily obtained with sufficient joining strength. In addition, it can be obtained at low cost.

Moreover, the friction stir welding apparatus for hollow profiles according to the present invention , particularly the third and fourth aspects thereof, is a hollow profile face plate to be used for joining in which the length of the penetrating portion to each butt portion of the probe means is Since the probe means is moved relative to the backing member and the rotating jig in the axial direction so as to have a dimension according to the thickness of the butt, it is positioned so as to penetrate each butted portion. For example, even when obtaining a plurality of types of joined bodies with different thicknesses of the face plate of the hollow shape material used for joining, the probe means according to the thickness of the butt portion accompanying the change in the thickness of the face plate The length of the penetrating part to the abutting portion can be appropriately changed, so that the probe means penetrates each abutting portion from the one side surface to the other side surface of each abutting portion. In addition, it is possible to position it reliably. Thereby, the entire metal of each butt portion can be sufficiently agitated by the probe means, so that each butt portion can be more sufficiently and reliably joined.

Therefore, according to such a friction stir welding apparatus for hollow profiles according to the present invention, a plurality of types of joined bodies having different thicknesses of face plates of the hollow profiles to be joined to each other are poorly bonded such as kissing bonds. It is possible to stably obtain a bonded portion having no sound and sufficient bonding strength.

Then, Oite friction stir welding equipment hollow shape member according to the present invention, when the distance between face plates of the hollow profile which is subjected to bonding to obtain a different type of conjugate, respectively, is very advantageously used As a result, it is possible to easily and inexpensively manufacture a plurality of types of bonded bodies having such a purpose with a sound structure without distortion and sufficient bonding strength.

In addition, according to the fifth aspect of the friction stir welding apparatus for hollow profiles according to the present invention, a plurality of aluminum alloy extruded profiles having a double skin structure have a number of excellent features as described above, and are extremely advantageous for friction stirring. It can be joined.

Hereinafter, to clarify the present invention more specifically, the configuration of the friction stir welding apparatus of the air profile in Ru engages the present invention, with reference to the drawings, there will be described in detail.

First, in FIG. 1, the present onset Ming Therefore, the friction stir welding the two hollow profile, an example of obtaining a wide panel is shown schematically. As is apparent from FIG. 1, here, each of the two hollow members 10a and 10b to be friction stir welded is opposed to each other in the vertical direction and is positioned in parallel, and is a top plate having a flat plate shape. 12 and a lower surface plate 14, and the upper and lower surface plates 10 and 12 are integrally connected by a plurality of ribs 16 (only one is shown here) extending between the opposing surfaces. It has a double skin structure (two-sided structure). Each of these hollow shapes 10 is made of an extruded shape made of an aluminum alloy. The material that provides the hollow shape member 10 is not limited to an aluminum alloy, and any metal material that can be friction stir welded may be used. The forming method is also particularly limited to the illustrated extrusion method. It is not something.

  In the present embodiment, when the friction stir welding operation is performed on the two hollow shape members 10a and 10b, first, the two hollow shape members 10a and 10b are arranged in the width direction (left and right direction in FIG. 1). ) And are abutted at the end surfaces in the width direction of the respective upper surface plates 12 and are also abutted at the end surfaces in the width direction of the respective lower surface plates 14. Thereby, between the two hollow shape members 10a and 10b, the upper butting portion 18 formed by abutting the upper surface plates 12 and the lower abutting portion 20 formed by abutting the lower surface plates 14 on each other, It is formed in the up-down direction, which is the opposing direction of the lower surface plates 12, 14, with a distance corresponding to the distance between the opposing surfaces of the upper and lower surface plates 12, 14.

  Next, after the two hollow members 10a and 10b are restrained by a predetermined restraining jig (not shown), the upper and lower abutting portions 18 formed between the two hollow members 10a and 10b. , 20 are friction stir welded. Here, the friction stir welding apparatus 22 used for this friction stir welding operation has a special structure not seen in the prior art.

  That is, the friction stir welding apparatus 22 has first and second two rotating jigs 24 and 26. Of these two rotating jigs 24 and 26, the first rotating jig 24 has a generally cylindrical shape as a whole, projects on the outer peripheral surface of the lower end thereof by a predetermined dimension in the radial direction, and is in the circumferential direction. An annular plate-shaped shoulder portion 28 having an outer flange shape extending continuously is integrally formed. In the shoulder portion 28, the lower end surface is a shoulder surface 27 formed of a flat annular surface extending in the horizontal direction.

  Further, the second rotating jig 26 has a substantially cylindrical shape as a whole, and a lower end portion of the second rotating jig 26 is an annular ring having a shoulder surface 30 formed of a circular flat surface extending in the horizontal direction. A plate-shaped shoulder portion 32 is integrally formed. Further, in the second rotating jig 26, as a probe means comprising a columnar protrusion having a low height protruding downward by a predetermined dimension with respect to the center portion of the lower end surface of the shoulder portion 32. The lower probe 34 is integrally provided on the same axis.

  Then, the second rotating jig 26 has a lower side portion including a portion where the shoulder portion 32 and the lower probe 34 are formed, and a lower end opening portion of the inner hole 36 in the cylindrical first rotating jig 24. The first and second rotary jigs 24 are inserted and arranged coaxially and axially (upward and downward) relative to each other in the inner hole 36 in a state of protruding downward from the inner hole 36. 26, the shoulder surfaces 27, 30 of the shoulder portions 28, 32 are opposed to each other at a predetermined distance in the vertical direction and are positioned in parallel.

  Further, although not explicitly shown in FIG. 1, here, the first and second rotating jigs 24 and 26 are connected to separate motors or the like synchronized with each other at the respective upper side portions. , Can be rotated together. Furthermore, the upper part of each of the rotating jigs 24 and 26 is also connected to a separate hydraulic cylinder that is protruded / retracted by a known hydraulic mechanism, and is associated with the protrusion / retraction operation of each of the hydraulic cylinders. When the hydraulic cylinders are stopped at a predetermined operating position, the rotary jigs 24 and 26 are stopped from moving in the vertical direction at arbitrary movement positions. It is supposed to be squeezed.

  As a result, the shoulder portion 28 of the first rotating jig 24 and the shoulder portion 32 of the second rotating jig 26 can be integrally rotated and can be relatively moved in the vertical direction. The lower probe 32 formed integrally with the shoulder portion 32 of the second rotating jig 26 is also connected to the shoulder portion 28 of the first rotating jig 24 together with the shoulder portion 32 of the second rotating jig 26. , Can rotate integrally and can move relative to each other in the vertical direction. Then, the relative movement of each of the shoulder portions 28 and 32 and the lower probe 32 is configured to be stopped and maintained at an arbitrary movement position.

  In addition, a backing member 42 composed of the abutting portion 38 and the insertion portion 40 is coaxially movable in the axial direction (vertical direction) at the intermediate portion in the axial direction of the second rotating jig 26. Extrapolated. The contact portion 38 of the backing member 42 is provided with a circular through hole 44 at the center thereof, so that the shoulder portion 28 provided at the lower end portion of the first rotating jig 24 is substantially similar to the ring. It has a plate shape, and its upper end surface is a backing surface 46 having a flat annular surface shape substantially the same as the shoulder surface 30 of the shoulder portion 28.

  On the other hand, the insertion portion 40 has a cylindrical shape having an outer diameter slightly smaller than the inner diameter of the inner hole 36 of the first rotating jig 24 and an inner diameter slightly larger than the outer diameter of the second rotating jig 26. ing. And it is made to extend integrally from the opening peripheral part of the through-hole 44 in the backing surface 42 of the contact part 38 in the state surrounding this through-hole 44 toward upper direction. That is, here, the backing member 42 is coaxially formed integrally on the annular plate-like contact portion 38 whose upper end surface is the backing surface 46 and the backing surface 46 of the contact portion 38. It is comprised by the integral goods which consist of the cylindrical insertion part 40 made.

  Then, such a backing member 42 is inserted in the axial direction intermediate portion of the second rotating jig 26 so as to be coaxially and externally movable relative to the vertical direction. In the inner hole 36 of the jig 24, the insertion position is coaxially and relatively movable in the vertical direction. Further, under such an inserted state, the base portion side portion of the insertion portion 40 located immediately above the contact portion 38 is protruded downward from the first rotating jig 24 by a predetermined length.

  Accordingly, here, the backing surface 46 of the backing member 42 is a predetermined distance in the vertical direction with respect to the shoulder surfaces 27 and 30 of the shoulder portions 28 and 32 of the first and second rotating jigs 24 and 26. The base side portion of the insertion portion 40 that is positioned opposite and parallel to each other and protruded downward from the first rotating jig 24 by a predetermined length is an upper probe as a probe means. 48.

  Although not clearly shown in FIG. 1, even in such a backing member 42, the first portion and the second rotating jig 24, 26 have the first portion at the upper portion of the insertion portion 40. The second rotating jigs 24 and 26 are coupled to a motor or the like synchronized with a motor for driving the rotation of the second rotating jigs 24 and 26 so that the first and second rotating jigs 24 and 26 can be rotated together. Further, the upper portion of the insertion portion 40 of the backing member 42 is also connected to a hydraulic cylinder that is protruded / retracted by a known hydraulic mechanism, and the first and second operations are performed in accordance with the protrusion / retraction operation of the hydraulic cylinder. The first and second rotary jigs of the backing member 42 are moved relative to the two rotary jigs 24 and 26 and moved downward / upward, and the hydraulic cylinder is stopped at a predetermined operating position. The relative movement in the vertical direction with respect to 24 and 26 is stopped at an arbitrary movement position.

  Thus, the abutting portion 38 of the backing member 42 can rotate integrally with the shoulder portions 28 and 32 of the first and second rotating jigs 24 and can be moved relative to each other in the vertical direction. The movement is configured to be stopped and maintained at an arbitrary movement position. In other words, the abutting portion 38 of the backing member 42 is capable of rotating integrally with the shoulder portions 28 and 32 of the first and second rotating jigs 24, and with respect to each of the shoulder portions 28 and 32. It is possible to move close to and away from each other, and the distance between them can be arbitrarily adjusted. As is clear from this, in this embodiment, the relative rotation prevention mechanism and the approach prevention mechanism are configured by the hydraulic mechanism and the hydraulic cylinder.

And Thus, the two hollow shape members 10a, between 10b, such that the upper and lower abutting portions 18, 20 are formed, together can they butt the two hollow shape members 10a, 10, constrain, above Subsequently to the above operation, the friction stir welding apparatus 22 having the above-described structure is used to friction stir weld the upper and lower abutting portions 18 and 20 formed between the two hollow members 10a and 10b. For example, the operation is performed as follows.

  That is, first, in a state where the first rotating jig 24 is immovable at a predetermined position, the second rotating jig 26 moves toward / separates (relatively moves) from the first rotating jig 24. Thus, the distance between the shoulder surface 27 of the first rotating jig 24 and the shoulder surface 30 of the second rotating jig 26 is the distance between the upper surface of the upper surface plate 12 and the upper surface of the lower surface plate 14, that is, The distance between the upper surface of the upper butt portion 18 and the upper surface of the lower butt portion 20 is the same. And the 2nd rotation jig 26 is made immovable in the position.

  Thereafter, the backing member 42 is moved relative to the second rotating jig 26 in the axial direction, so that the contact portion 38 of the backing member 42 and the shoulder portion 32 of the second rotating jig are brought into contact with each other. The distance between the backing surface 46 of the backing member 42 and the shoulder surface 30 of the second rotating jig 26 is moved between the lower surface of the upper surface plate 12 and the upper surface of the lower surface plate 14. , I.e., the distance between the lower surface of the upper butting portion 18 and the upper surface of the lower butting portion 20. At that position, the backing member 42 is immovable. At this time, the distance between the shoulder surface 27 of the first rotating jig 24 and the backing surface 46 of the backing member 42 is automatically made equal to the thickness of the upper butt portion 18 (upper surface plate 12). .

  The positioning operation of the second rotating jig 26 and the backing member 42 with respect to the first rotating jig 24 based on the position of the first rotating jig 24 is performed in the opposite manner to the above-described order. After aligning the backing member 42 so that the distance between the surface 27 and the backing surface 46 is the same as the thickness of the upper butt 18, the distance between the backing surface 46 and the shoulder surface 30 is set. There is no problem even if the second rotating jig 26 is aligned so that the distance is the same as the distance between the lower surface of the upper butting portion 18 and the upper surface of the lower butting portion 20. Further, instead of using the position of the first rotating jig 24 as a reference, the first rotating jig 24 and the backing member 42 are aligned or backed up using the position of the second rotating jig 26 as a reference. It is of course possible to align the first and second rotating jigs 24 and 26 with the position of the member 42 as a reference.

  Next, the first and second rotating jigs 24 and 26 and the backing member 42 are integrally rotated, and thereafter, or before, the upper side consisting of the base side portion of the insertion portion 40 in the backing member 42. The probe 48 and the lower probe 34 projected downward from the shoulder portion 32 of the second rotating jig 24 are positioned so as to penetrate the upper butting portion 18 and the lower butting portion 20, respectively. This can be done, for example, by one of the following two placement methods.

  That is, when the first arrangement method of the two methods is performed, the first and second rotating jigs 24 and 26 and the backing member 42 are integrally rotated, The side surfaces of the upper probe 48 and the lower probe 34 are brought into contact with the end surfaces of the upper butting portion 18 and the lower butting portion 20 on the joining start side, respectively, and the upper and lower probes 48 and 34 are It is pressed along the upper and lower abutting portions 18 and 20 toward the joining end side. Thereby, the upper probe 48 and the lower probe 34 are respectively inserted into the respective joining start side end portions of the upper butting portion 18 and the lower butting portion 20, and in the upper and lower butting portions 18 and 20, Each of them will be positioned so as to penetrate them.

  When performing the second arrangement method, as shown in FIG. 2, first, the upper and lower abutting portions 18 and the lower abutting portions 20 at the corresponding portions in the vertical direction at the end of the joining start side. The insertion holes 50 through which the upper probe 48 and the lower probe 34 can be inserted are respectively drilled in advance (only the insertion hole 50 drilled in the upper butt portion 18 is shown in FIG. 2). The insertion holes 50 formed in the upper abutting portion 18 are formed as shown by a two-dot chain line in FIG. 2 when the abutting state of the upper surface plates 12 of the two hollow shapes 10a and 10b is eliminated. It is formed as a semicircular notch with respect to the width direction end of each upper surface plate 12, and the insertion hole formed in the lower abutting portion 20 has the same form. Is.

Then, once the insertion holes 50 are formed in the upper and lower butting portions 18 and 20, the butted state of the two hollow shapes 10a and 10b is once canceled (the state shown by the two-dot chain line in FIG. 2). ) Thereafter, the upper probe 48 and the lower probe 48 are placed between the end faces of the corresponding face plates 12 and 14 under the state where the integral rotation of the first and second rotating jigs 24 and 26 and the backing member 42 is stopped. with a side probe 34 is brought into, respectively it position, between the facing surfaces of the upper plate 12 and lower plate 14, the shoulder portion 32 of the contact portion 38 of the backing member 42 and the second rotary jig 26, respectively After being positioned facing each other, the two hollow profiles 10a and 10b are again abutted so that the upper and lower abutting portions 18 and 20 are formed. As a result, the upper probe 48 and the lower probe 34 are inserted into the insertion holes 50 provided in the upper butting portion 18 and the lower butting portion 20, respectively. The lower probe 34 is positioned in the upper and lower abutting portions 18 and 20 so as to pass through them. In this case, for example, the first and second rotating jigs 24 and 26 and the backing member 42 are integrally rotated after the butting operation of the two hollow members 10a and 10b again. .

  At this time, as described above, the distance between the backing surface 46 of the backing member 42 and the shoulder surface 30 of the second rotating jig 26 is between the opposing surfaces of the upper surface plate 12 and the lower surface plate 14. The distance, in other words, the distance between the upper abutting portion 18 and the lower abutting portion 20 is the same as the distance between the shoulder surface 27 of the first rotating jig 24 and the backing surface 46 of the backing member 42. The distance between them is the same as the thickness of the upper surface plate 12.

  Therefore, the upper and lower probes 48 and 34 may pass through the upper and lower abutting portions 18 and 20 by any one of the first and second arrangement methods as described above, or other methods. Under the positioned state, the first rotating jig 24, the second rotating jig 26, and the backing member 42 are integrally rotated, whereby the shoulder surface 27 and the backing member 42 of the first rotating jig 24 are rotated. The back surface 46 of the second rotating jig 26 is brought into contact with the upper surface and the lower surface of the upper abutting portion 18 while being rotated integrally, while the shoulder surface 30 of the second rotating jig 26 is backed with the first rotating jig 24. It is brought into contact with the upper surface of the lower butt 20 while being rotated together with the member 42. At this time, a known backing member is brought into contact with the lower surface of the lower abutting portion 20 forming portion of each lower surface plate 14 as necessary.

  From such a state, the first rotating jig 24, the second rotating jig 26, and the backing member 42 are relatively moved along the upper butting section 18 and the lower butting section 20. By being moved integrally, the upper butt portion 18 and the lower butt portion 20 are simultaneously friction stir welded, so that the intended wide panel is manufactured.

  Thus, in this embodiment, since the upper abutting portion 18 and the lower abutting portion 20 are joined at the same time by friction stir welding, the joining operation of the two hollow members 10a and 10b, That is, simplification of the manufacturing operation of the intended wide panel and shortening of the working time can be advantageously achieved, and the occurrence of bending of the face plates 12 and 14 of the hollow shape members 10a and 10b after joining is effective. The occurrence of distortion in the two manufactured wide panels can be advantageously eliminated or suppressed.

  Further, in this embodiment, the shoulder surface 27 of the first rotating jig 24 and the backing surface 46 of the backing member 42 are respectively on the upper surface and the lower surface of the upper butt portion 18 in a rotating state. Since the frictional heat generated between the contact surfaces is sufficiently plasticized, the entire upper butt portion 18 is sufficiently plasticized, and the metal of the entire upper butt portion 18 is more sufficiently stirred. Can be done.

  Therefore, according to this embodiment, the intended wide panel can be obtained easily and efficiently with a sound structure with little distortion and sufficient bonding strength.

  In particular, in the method of the present embodiment, the distance between the backing surface 46 of the abutting portion 38 of the backing member 42 and the shoulder surface 30 of the shoulder portion 32 of the second rotating jig 26 is such that they are in contact with each other. The backing member 42 and the second rotating jig 26 are moved toward or away from each other so that the distance between the lower surface of the upper butted portion 18 and the upper surface of the lower butting portion 20 is the same. Therefore, for example, after two hollow profiles 10a and 10b are friction stir welded to form one type of wide panel, the top plate 12 and the bottom plate 12 of the hollow profiles 10a and 10b to be joined are joined. When obtaining another type of wide panel different in distance from the face plate 14 from the one type of wide panel, the abutting portion 38 of the backing member 42 and the shoulder portion of the second rotating jig 26 are simply used. 32 and approach each other And it allowed dynamic, by adjusting the distance between the backing surface 46 and the shoulder surface 30 can be diverted friction stir welding apparatus 22 which is used in the production of the previous wide panel.

  Therefore, according to the present embodiment, when obtaining a plurality of types of wide panels having different distances between the upper surface plate 12 and the lower surface plate 14 of the hollow shape members 10a and 10b to be joined, respectively. The necessity of preparing a friction stir welding apparatus dedicated to the wide panel of this type can be advantageously eliminated, and as a result, the manufacturing cost of such multiple types of wide panels can be drastically reduced.

Next, FIG. 3 and FIG. 4, the above embodiment shown in FIG. 1, arrangement structure of the backing member is shown different FSW equipment. Regarding such 3 and form state shown in FIG. 4, and later figures 5 to each form state shown in FIG. 8, are members, and a similar structure to the embodiment shown in FIG. 1 It should be understood that the detailed description of the portions is omitted by giving the same reference numerals as those in FIG. 1 in FIGS.

That is, as is clear from FIG. 3, in the friction stir apparatus 52 used therein, such as backing member 54, the insertion portion 40 is removed from the backing member 42 in the first embodiment It has an overall shape of an annular plate. The backing member 54 is connected to the portion of the second rotating jig 26 in the through hole 44 with respect to the portion immediately below the upper probe 55 of the second rotating jig 26 whose axial intermediate portion is the upper probe 55. An extrapolated arrangement is provided in a state of facing the shoulder portion 32.

  In addition, as shown in FIG. 4, the inner peripheral surface of the through-hole 44 of the backing member 54 has a plurality of V grooves 56 that are V-shaped in cross section and are adjacent to each other in the circumferential direction. It is formed so as to be located in the periphery and continuously extend in the axial direction. On the other hand, on the outer peripheral surface of the axially intermediate portion of the second rotating jig 26, a plurality of protrusions 58 serving as protrusions having a V-shaped cross section corresponding to the V groove 56 of the backing member 54 are provided in the circumferential direction. Are integrally formed with a predetermined length in the axial direction of the second rotating jig 26. Then, the backing member 54 protrudes into the V-groove 56 with respect to the axially intermediate portion of the second rotating jig 26 provided with such a plurality of protrusions 58. It is extrapolated in a state in which each of the strips 58 is inserted.

  Thus, here, the V-grooves 56 of the backing member 54 and the protrusions 58 of the second rotating jig 26 inserted into the V-grooves are engaged with each other on the respective side surfaces, so that the backing member 54 The relative rotation with respect to the second rotation jig 26 is prevented, and the backing member 54 is integrally rotated together with the rotation of the second rotation jig 26. When the protrusion 58 is slid between the side surfaces, the backing member 54 can be moved relative to the second rotating jig 26 in the axial direction. As is clear from this, here, a plurality of V grooves 56 and a plurality of protrusions 58 constitute a relative rotation blocking mechanism. In addition, the shape of the groove part and protrusion which comprise this relative rotation prevention mechanism, and the number of arrangement | positioning are not limited at all to an illustration.

Further, in the present form state, in particular, under extrapolation state to the second rotary jig 26 in such backing member 54 described above, the backing member 54, integrally with the lower end portion of the second rotating jig 26 A compression coil spring 60 as an urging means is interposed between the formed shoulder portion 32 in a pre-compressed state, whereby the backing member 54 is attached to the compression coil spring 60. Based on the force, the second rotating jig 26 is biased in a direction away from the shoulder portion 32. In addition, the arrangement position and the number of arrangement of the compression coil springs 60 between the shoulder portion 32 and the backing member 54 of the second rotating jig 26 are not limited to the examples, and Instead of such a compression coil spring 60, a known urging means may be used.

  Thus, when the friction stir welding apparatus 52 having such a structure is used to frictionally stir the upper and lower butted portions 18 and 20 of the two hollow shape members 10a and 10b butted against each other, First, the backing member 54 is pressed downward against the urging force of the compression coil spring 60, so that the backing member 54 is brought close to the shoulder portion 32 of the second rotating jig 26. The upper probe 55 and the lower probe 34 of the second rotating jig 26 are connected to the upper butting portion 18 and the lower butting portion 20 by the same method as in the first embodiment, preferably the second arrangement method. Are positioned so as to penetrate them. At this time, the shoulder surface 27 of the first rotating jig 24 and the shoulder surface 30 of the second rotating jig 26 are brought into contact with the upper surface of the upper butting portion 18 and the lower surface of the lower butting portion 20.

  Thereafter, as shown in FIG. 3, when the downward pressing force against the backing member 54 is eliminated, the back surface is not affected regardless of the distance between the lower surface of the upper butting portion 18 and the upper surface of the lower butting portion 20. The backing surface 46 of the abutting member 54 is brought into contact with the lower surface of the upper abutting portion 18 in a pressed state, whereby the approaching movement of the backing member 54 to the shoulder portion 32 of the second rotating jig 26 is performed. Based on the urging force of the compression coil spring 60, it is blocked. As is clear from this, an approach prevention mechanism is constituted by the compression coil spring 60 here.

  After that, the first rotating jig 24, the second rotating jig 26, and the backing member 54 are integrally rotated, and the shoulder surfaces 27, 30 and the back surfaces of the first and second rotating jigs 24, 26 are rotated. The back surface 46 of the abutting member 54 is positioned so as to pass through the upper and lower abutting portions 18 and 20 while being brought into contact with the upper and lower abutting portions 18 and 20 under rotation. The upper and lower probes 34 and 55 of the two-turn jig 26 are moved relative to the butting portions 18 and 20, so that the upper butting portion 18 and the lower butting portion 20 are simultaneously friction stir welded. Thus, the intended wide panel is obtained.

Thus, even in the present form state, the upper butt portion 18 and the lower butt portion 20 are adapted to be friction stir welding at the same time, also, the lower surface and the lower abutment of the upper abutting portion 18 20 Since the distance between the backing surface 46 of the backing member 54 and the shoulder surface 30 of the second rotating jig 26 is adjusted in accordance with the distance between the upper surface and the upper surface, the above-described implementation is performed. A plurality of types of wide panels having different distances between the upper surface plate 12 and the lower surface plate 14 of the hollow shape members 10a and 10b provided for bonding, having sufficient bonding strength It can be obtained easily and at low cost.

  And here, in particular, by the uneven fitting of the plurality of V grooves 56 provided on the inner peripheral surface of the backing member 54 and the plurality of protrusions 58 provided on the outer peripheral surface of the second rotating jig 26. The backing member 54 can be rotated together with the second rotating jig 26, and the upper and lower sides of the backing surface 46 of the backing member 54 and the shoulder surface 30 of the second rotating jig 26. It is interposed between the backing member 54 and the second rotating jig 26 that the backing member 54 is moved closer to the second rotating jig 26 under the contact state with the side abutting portions 18 and 20. It is prevented by the biasing force of the compressed compression spring 60.

Thus, in this form state, the backing member 54, together with the motor for rotating integrally with the first rotating jig 24 and the second rotary jig 26 may be omitted, back during the practice of the friction stir welding operation A hydraulic cylinder, a hydraulic mechanism, or the like for preventing the contact member 54 from moving closer to the second rotating jig 26 and maintaining the contact state of the backing surface 46 with respect to the upper abutting portion 18 can be omitted. Therefore, the installation cost of the friction stir welding apparatus 52 and the work cost in the friction stir welding operation can be advantageously reduced.

  Further, in the friction stir welding apparatus 62 shown in FIG. 5, similar to the first rotating jig 24, as a whole, the friction stir welding apparatus 62 has a substantially cylindrical shape, and an annular plate shape having an outer flange shape at the lower end thereof. A second rotating jig 64 having a shoulder portion 32 is inserted and arranged coaxially with respect to the backing member 42 so as to be relatively movable in the axial direction. A cylindrical rotary rod 66 as a probe means is coaxially inserted and arranged so as to be relatively movable in the axial direction. Here, the lower end portion of the rotating rod 66 is positioned so as to protrude from the shoulder surface 30 of the shoulder portion 32 of the second rotating jig 64 by a predetermined length, and the lower end portion of the rotating rod 66 is the lower side. The probe 68 is used.

  And although not explicitly shown in FIG. 5, the second rotating jig 64 and the rotating rod 66 are connected to the first rotating jig 24 and the backing member 42 at their upper portions. The first and second rotating jigs 24 and 64, the backing member 42, and the rotating rod 66 are connected to each other by a motor having a similar structure and a hydraulic cylinder operated by a hydraulic mechanism. They can rotate together and can move relative to each other, and the relative movement can be stopped and maintained at an arbitrary moving position. That is, here, the hydraulic cylinder and the hydraulic mechanism constitute a relative rotation blocking mechanism, an approach blocking mechanism, and a relative movement blocking mechanism, respectively.

  Thus, in the present embodiment, the first rotating jig 24, the second rotating jig 64, and the backing member 42 are configured to be relatively moved in the axial direction independently of each other, thereby The distance between the backing surface 46 of the backing member 42 and the shoulder surface 30 of the second rotating jig 64 can be arbitrarily changed, and the shoulder surface of the second rotating jig 64 can be changed. The protruding length of the rotating rod 66 from 30, that is, the length of the lower probe 68 can be freely adjusted.

  Therefore, in the present embodiment, the backing member 42 and the second rotating jig 64 can be moved toward and away from each other by the relative movement of the backing member 42 and the second rotating jig 64. As in the embodiment, a plurality of types of wide panels having different distances between the upper surface plate 12 and the lower surface plate 14 of the hollow shape members 10a and 10b to be joined can be easily and sufficiently bonded with sufficient strength. It can be obtained at low cost.

  In particular, in the present embodiment, since the length of the lower probe 68 can be freely adjusted, for example, the top plate 12 of the hollow members 10a and 10b used for joining. Even when a plurality of types of wide panels having different thicknesses of the lower surface plate 14 are obtained, depending on the thickness of the lower abutting portion 20 accompanying the change in the thickness of the lower surface plate 14. Thus, the length of the penetrating portion of the lower probe 68 to the lower butting portion 20 can be appropriately changed. And it becomes possible to fully stir the metal of the whole lower butt | matching part 20 by this, and this lower butt | matching part 20 can be joined more reliably.

  Further, when the thickness of the upper surface plate 12, that is, the thickness of the upper abutting portion 18 is changed, the shoulder portion 28 of the first rotating jig 24 and the abutting portion 38 of the backing member 42 are approached or separated from each other. By moving it, the length of the upper probe 48 can be arbitrarily and easily changed.

  Therefore, according to the present embodiment, a plurality of types of wide panels having different thicknesses of the upper surface plate 12 and the lower surface plate 14 of the hollow shape members 10a and 10b to be bonded are bonded to each other, such as kissing bonds. Therefore, it is possible to stably obtain a bonded portion having no sound and sufficient bonding strength.

Further, in the friction stir welding apparatus 70 shown in FIG. 6, similar to the backing member 72 both of the second rotating jig 74, the backing member 54 in the form state where Ru shown in FIGS. 3 and 4 It is a simple structure. That is, the backing member 72 and the second rotating jig 74 both have an annular plate shape, and extend in the axial direction on the inner peripheral surfaces of the through holes 73 and 75 provided in the center portions thereof. A plurality of grooves 56 are provided.

  Further, a rotating rod 71 as a probe means is inserted into the inner hole 36 of the first rotating jig 24 so as to be able to rotate integrally with the first rotating jig 24 and to be relatively movable in the axial direction. Has been. Further, in this rotating rod 71, the upper portion of the portion protruding downward from the inner hole 36 of the first rotating jig 24 is the upper probe 76, while the lower end portion is the lower probe 77. Has been. Furthermore, on the outer peripheral surface of the portion of the rotating rod 71 between the upper probe 76 and the lower probe 77, on the inner peripheral surface of each of the through holes 73 and 75 of the backing member 72 and the second rotating jig 74. A plurality of protrusions 58 having a V-shaped cross section corresponding to the provided V groove 56 are integrally formed so as to be adjacent to each other in the circumferential direction and extend in the axial direction.

  And the backing member 72 and the 2nd rotation jig 74 are each extrapolated with respect to such a rotation rod 71 in the state which protruded the protrusion 58 in each V groove 56, respectively. Thus, the backing members 72 and 74 are not rotatable relative to the rotating rod 71 and are relatively movable in the axial direction.

Further, here, the compression coil is interposed between the backing member 72 and the second rotating jig 74 under the extrapolation state of the backing member 72 and the second rotating jig 74 to the rotating rod 71. The spring 60 is interposed in a pre-compressed state, and therefore the upper and lower abutting portions 18 of the backing surface 46 of the backing member 72 and the shoulder surface 30 of the second rotating jig 74, Under the state of contact with 20, the approaching movement between the backing member 72 and the second rotating jig 74 is prevented. That is, in this form state at a plurality of V grooves 56 and a plurality of projections 58. The relative rotation preventing mechanism is configured, also, by the compression coil spring 60, close preventing mechanism is constituted.

  Thus, while the backing member 72 and the second rotating jig 74 are inserted into the rotating rod 71, the backing member 72 and the second rotating jig 74 can be moved toward or away from each other. The lengths of the penetrating portions of the upper and lower probes 76 and 77 to the upper and lower butting portions 18 and 20 are variable.

Therefore, according to this form state, similar actions and effects as in the previous forms are as it can be very effectively enjoyed, in addition, as with the implementation form that shown in FIG. 5, the joint A plurality of types of wide panels having different thicknesses of the upper surface plate 12 and the lower surface plate 14 of the hollow shape members 10a and 10b to be provided have a bonding portion having a sound and sufficient bonding strength without bonding defects such as kissing bonds. Also, the excellent feature that it can be stably obtained can be advantageously exhibited.

Further, the friction stir welding apparatus 78 shown in FIG. 7, the overall structure, has been the same as the implementation form that shown in FIG. 5, with respect to the lower end of the rotating rod 66, in FIG. 1 shows A tip backing member 79 having the same structure as the second rotating jig 26 in the first embodiment is integrally formed. That is, the tip backing member 79 has an annular plate shape as a whole, and is provided integrally with the lower end portion of the rotating rod 66 in the form of an outer flange. Further, in the tip backing member 79, the upper surface thereof is a backing surface 80 that contacts the lower surface of the lower butt portion 20.

  Therefore, in the present embodiment, when the upper butt portion 18 and the lower butt portion 20 are simultaneously friction stir welded, it is necessary to make another backing jig that is brought into contact with the lower surface of the lower butt portion 20 in another easy manner. Therefore, it is possible to advantageously simplify the friction stir welding operation and thus the intended wide panel manufacturing operation.

  Further, since the tip backing member 79 can be rotated together with the second rotating jig 26, frictional heat is generated between the lower surface of the lower abutting portion 20 and the backing surface 80 of the tip backing member 79. The lower surface side portion of the lower butt portion 20 can be more sufficiently plasticized, and the entire metal of the lower butt portion 20 can be more sufficiently agitated. As a result, the joint strength of the joint formed at the lower butt 20 can be further advantageously increased.

  Further, in the friction stir welding apparatus 82 shown in FIG. 8, the annular plate-like backing member 84 and the second rotating jig 86 are formed from the opening peripheral edge of each of the through holes 88 and 90 on their opposing surfaces. These are integrally connected by a cylindrical connecting portion 92 extending integrally. That is, the backing member 84 and the second rotating jig 86 are configured as an integrated product that is connected by the connecting portion 92.

Further, the inner peripheral surface of each of the through holes 88 and 90 of the backing member 84 and the second rotating jig 86 and the inner peripheral surface of the inner hole of the connecting portion 92 are shown in FIG. Like the upper and lower backing members 72, 74 in that form state, V groove 56 is provided with a plurality.

Further, here, in the inner hole 36 of the first rotating jig 24, rotating rod 71, has a similar structure of that Ru forms state that shown in FIG. 6, with respect to the first rotating jig 24 These are arranged so as to be able to rotate integrally and relatively move in the axial direction. Also, a plurality of protrusions 58 having a V-shaped cross section corresponding to the V groove 56 are integrally formed at a portion between the upper and lower probes 76 and 77 in the rotating rod 71.

  Then, the backing member 84 and the second rotating jig 86 are extrapolated with respect to such a rotating rod 71 in a state in which the protrusion 58 is inserted into each V groove 56, respectively. As a result, the backing member 84 and the second rotating jig 86 are not rotatable relative to the rotating rod 71 and are relatively movable in the axial direction. The lengths of the penetrating portions to the upper and lower butting portions 18, 20 of the side probes 76, 77 are variable.

Thus, also in this form state, the hollow shape members 10a to be subjected to joining and 10b plurality of types of wide panels have different thicknesses, respectively of the upper plate 12 and lower plate 14 of sound without junctions defects such Kissing Bond In addition, it is possible to stably obtain a joint having a sufficient joint strength.

However, in some form states the cause, to face each other in the vertical direction, the two face plates 12, 14 which is allowed positioned parallel, hollow shape member 10a made are integrally connected by a plurality of ribs 16, Although the specific example of what applied this invention was shown with respect to the method of friction stir welding of 10b, and the apparatus used for it, this invention is 3 or more sheets which are located in parallel and mutually opposed. The face plate can be advantageously applied also to a technique for friction stir welding of a plurality of hollow shape members integrally connected by a plurality of ribs and an apparatus used therefor. In that case, two or more rotating jigs and two or more backing members are arranged alternately on the same axis to constitute a friction stir welding apparatus, and The device will be used for friction stir welding operation.

  In addition, the present invention can be implemented in various forms, and any of various embodiments relating to various changes, modifications, and improvements of the present invention adopted based on the knowledge of those skilled in the art. It should be understood that the present invention belongs to the category of the present invention without departing from the spirit of the present invention.

  In the following, some examples of the present invention will be shown and the characteristics of the present invention will be further clarified, but the present invention is not limited by the description of such examples. Needless to say.

  First, as a hollow shape material to be joined, the thickness of the face plate is 10 mm, the overall height is 250 mm, the distance between the opposing faces of the face plate is 230 mm, the width is 250 mm, the length is 10 m, and 6N01- Two extruded shapes having a double skin structure made of an aluminum alloy having a T5 material were prepared. Further, as the friction stir welding apparatus, first and second rotating jigs having a structure as shown in FIG. 1, a backing member, and upper and lower probes provided on the second rotating jig and the backing member. A device in which each of the upper and lower probes has a diameter of 10 mm, the diameter of each shoulder surface of the first and second rotating jigs is 25 mm, and the diameter of the backing surface of the backing member is 25 mm. Got ready.

  And in the state in which the prepared two extruded sections are butted in the width direction, and the corresponding upper butted section and lower butted section in the opposing direction of the two face plates of each extruded section are respectively formed. Two extruded profiles were fixed on the table.

  Subsequently, in a state where the first rotating jig of the friction stir welding apparatus cannot be moved in the axial direction, the second rotating jig is moved relative to the first rotating jig, and the distance between the shoulder surfaces is determined. After adjusting the distance between the upper surfaces of the upper and lower abutting portions to be 240 mm, which is the same as the distance between the upper surfaces, the backing member is moved relative to the second rotating jig, and the backing surface of the backing member And the shoulder surface of the second rotating jig were adjusted to be 230 mm, which is the same as the distance between the lower surface of the upper butt portion and the upper surface of the lower butt portion. Further, the second rotating jig and the backing member were made impossible to move in the axial direction after adjusting their positions.

  Next, while rotating the first and second rotating jigs and the backing member at a rotation speed of 1000 rpm, the respective side surfaces of the upper probe and the lower probe are turned to the end surfaces on the joining start side of the upper and lower abutting portions. The upper probe and the lower probe were inserted into the upper and lower abutting portions, respectively. At this time, the backing surface of the backing member is in contact with the lower surface of the upper butting portion, the shoulder surface of the second rotating jig is in contact with the upper surface of the lower butting portion, and further, The shoulder surface was in contact with the upper surface of the upper butt portion.

  Thereafter, the first and second rotating jigs and the backing member are moved horizontally at a rotational speed of 1000 rpm and a joining speed of 500 mm / min, and the upper and lower butt portions are simultaneously friction stir welded. Thus, the intended wide panel was obtained.

  And the wide panel obtained in this way was cut | disconnected in the direction orthogonal to a joining direction, and the cross section of the junction part was observed visually. As a result, no defects were recognized. This clearly shows that the wide panel manufactured according to the method of the present invention has a sound joint.

  In addition, as a result of conducting a tensile test and a static four-point bending test on a wide panel by a known method, the plate was broken at a face plate part away from the joint. Thereby, it can be recognized that the wide panel manufactured according to the method of the present invention has a sufficiently high bonding strength.

  Furthermore, as a result of performing a four-point bending fatigue test of the wide panel by a known method, the wide panel was broken at the face plate portion away from the joint. In addition, the breaking load at that time is compared with the breaking load by the four-point bending fatigue test of the wide panel obtained by butt-joining the two extruded profiles prepared by the conventional MIG welding technique. It was recognized that it was expensive. From this result, it can be clearly recognized that the wide panel manufactured according to the method of the present invention has a sufficiently high bonding strength.

It is explanatory drawing which shows one process example at the time of carrying out friction stir welding of two hollow shapes using an example of the friction stir welding apparatus which has a structure according to this invention. It is explanatory drawing which shows another example of a process at the time of carrying out friction stir welding of two hollow shapes using the friction stir welding apparatus shown by FIG. Using another example of the friction stir welding apparatus is a view corresponding to FIG. 1 showing a state of friction stir welding the two hollow profile. FIG. 4 is a partially enlarged explanatory view taken along the line IV-IV in FIG. 3. It is a figure corresponding to FIG. 1 which shows the state which is carrying out the friction stir welding of two hollow shapes using another example of the friction stir welding apparatus which has a structure according to this invention. Using another example of friction stir welding apparatus is a view corresponding to FIG. 1 showing a state of friction stir welding the two hollow profile. It is a figure corresponding to FIG. 1 which shows the state which is carrying out the friction stir welding of two hollow shapes using the further another example of the friction stir welding apparatus which has a structure according to this invention. Using another example of the friction stir welding apparatus is a view corresponding to FIG. 1 showing a state of friction stir welding the two hollow profile.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Hollow profile 12 Upper surface board 14 Lower surface board 16 Rib 18 Upper butt | matching part 20 Lower butt | matching part 22,52,62,70,78,82 Friction stir welding apparatus 24 1st rotary jig 26,64,74,86 1st Two-turn jig 27, 30 Shoulder surface 34, 68, 77 Lower probe 42, 54, 72, 84 Backing member 46 Backing surface 48, 55, 76 Upper probe 56 V groove 58 Projection 60 Compression coil spring 66, 71 Rotating rod

Claims (5)

Two hollow plates having a structure in which two upper and lower face plates facing and parallel to each other are integrally connected with each other by a plurality of ribs extending between the facing faces are used as corresponding face plates. The upper and lower two butted portions formed in the opposing direction of the face plates , and simultaneously friction stir welding,
An annular plate-shaped shoulder portion provided with a shoulder surface brought into contact with the upper surface of the upper side plate in the upper butt portion has an inner hole penetrating in the axial direction provided at the lower end portion, and is rotatable around the axis. A cylindrical first rotating jig that is movable in the axial direction;
An annular plate-shaped shoulder portion having a shoulder surface that is brought into contact with the upper surface of the lower side plate in the lower butting portion is provided at the lower end portion, and downward from the lower end opening portion of the inner hole of the first rotating jig. A second rotating jig that is inserted and arranged coaxially and axially movable in the inner hole in a protruding state, and is rotatable about the axis and movable in the axial direction;
The projecting portion is provided so as to project coaxially downward from the center portion of the shoulder portion of the second rotating jig, and is configured by a projecting portion that is rotatable about an axis and movable in the axial direction. A lower probe in which a friction stir welding operation of the lower butt portion is performed by rotation around the axis of the portion;
An annular plate-shaped abutting portion having a backing surface brought into contact with the lower surface of the upper side plate in the upper butt portion, and a cylindrical insertion portion coaxially and integrally formed on the backing surface of the corresponding portion The insertion portion is inserted coaxially and axially relative to the gap between the inner hole of the first rotating jig and the insertion portion of the second rotating jig inserted therein, A backing member disposed and rotatable about an axis and movable in the axial direction;
Friction stir welding of the upper butt portion is configured by rotation of the base side portion based on rotation around the axis of the backing member, which is configured at a base side portion which is the contact portion side of the insertion portion in the backing member An upper probe on which the operation is performed,
A friction stir welding apparatus for a hollow shape material, characterized in that it is configured to include. The hollow stirrer friction stir welding apparatus according to claim 1, wherein the lower probe is provided integrally with the second rotating jig. A rotating rod is disposed so as to be coaxially rotatable and relatively movable in the axial direction so as to penetrate the second rotating jig in the axial direction, and the shoulder portion of the rotating rod in the second rotating jig The friction stir welding apparatus for a hollow member according to claim 1, wherein the lower probe is configured at a portion protruding downward from the base. A rotating rod having an annular plate-shaped tip backing member integrally formed at the lower end with a backing surface that is brought into contact with the lower surface of the lower side plate at the lower butt is provided at the lower end of the second rotating jig. The lower probe is disposed at a base side portion that is coaxially rotatable and relatively movable in the axial direction so as to penetrate the axial direction of the rotating rod, and is on the distal end backing member side of the rotating rod. The hollow stir friction stir welding apparatus according to claim 1, which is configured. The hollow profile is an aluminum alloy extruded profile having a double skin structure in which two of the face plates positioned parallel to each other are integrally connected by the plurality of ribs extending between the facing surfaces. there friction stir welding apparatus of the hollow profile according to any one of claims 1 to claim 4.

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