JP2008279513A - Friction stir welding method for double skin panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a friction stir welding method for a double skin panel where, even if there is a level difference between outside faces in a state where edge parts are butted to each other before welding, friction stir welding can be flatly performed in such a manner that the level difference is not left after the welding. <P>SOLUTION: When a first double skin panel 10 provided with a first outer plate 11 and a first inner plate 12 substantially parallel to each other, and in which the edge part of the first outer plate 11 is supported by a lattice 13, and a second double skin panel 20 provided with a second outer plate 21 and a second inner plate 22 substantially parallel to each other, and in which the edge part of the second outer plate 21 is formed so as to be deformable to a direction in which the distance between the second outer plate 21 and the second inner plate 22 is made narrow are subjected to friction stir welding, a rotary tool 30 is pushed into the butted parts, the edge part of the second outer plate 21 is deformed in such a manner that the outer side face 11a of the first outer plate 11 and the outer side face 21a of the second outer plate 21 during the welding are made flat, and further, the pressing force of the rotary tool 30 is supported by the lattice 13. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for friction stir welding of double skin panels.

  FIG. 14 shows a conventional method in which a pair of double skin panels (hereinafter sometimes simply referred to as “panels”) are brought into contact with each other at the ends and friction stir welding is performed. As shown in FIG. 14 (a), one double skin panel 10 'is a hollow extruded profile made of aluminum alloy, and an outer plate 11 and an inner plate 12 that are substantially parallel to each other, and a lattice 13 that connects them. , 13,... And a vertical support plate 15 that connects the end of the outer plate 11 and the end of the inner plate 12. The other double skin panel 20 ′ is similar, and includes an outer plate 21, an inner plate 22, lattices 23, 23,.

  In order to join the panel 10 'and the panel 20', first, as shown in FIG. 14 (b), the vertical support plates 15 and 25 are abutted with the outer plates 11 and 21 facing up, and the stirring pin is placed on the boundary surface. The rotary tool 30 is pushed into the abutting portion T1 of the outer plates 11 and 21 from above so that the center line of 32 is located, and friction stir welding is performed. Next, as shown in FIG. 14 (c), the panels 10 ′ and 20 ′ to which the outer plates 11 and 21 are joined are turned upside down so that the inner plates 12 and 22 face up, and the boundary surfaces of the vertical support plates 15 and 25. The rotary tool 30 is pushed into the abutting portion T2 of the inner plates 12 and 22 from above so that the center line of the agitation pin 32 is positioned above, and friction agitation welding is performed. Since the downward pressing force acting on the outer plates 11 and 21 or the inner plates 12 and 22 from the rotary tool 30 during the friction stir welding is supported by the rigid vertical support plates 15 and 25, the butt portions T1 and T2 are The panels 10 'and 20' are joined with the outer surfaces of the outer plates 11 and 21 and the outer surfaces of the inner plates 12 and 22 being flat without sinking (see Patent Document 1).

Japanese Patent No. 3014654 ([0009]-[0012], FIG. 1)

  However, the thickness of the double skin panel 10 ′ (the distance between the outer surface of the outer plate 11 and the outer surface of the inner plate 12) may be slightly different depending on the part due to unavoidable manufacturing errors and the like. . The same applies to the panel 20 '. Further, the thickness of the panel 10 'and the thickness of the panel 20' may be slightly different from each other. Therefore, in reality, as shown in FIG. 15A, for example, a step D is generated between the outer surface 11a of the outer plate 11 of the panel 10 ′ before joining and the outer surface 21a of the outer plate 21 of the panel 20 ′. There are many. When the friction stir welding is performed as it is, as shown in FIG. 15B, the panels 10 ′ and 20 ′ are joined while the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21 are in a step difference. As a result, it is no longer useful as a product.

  Such a problem is not limited to the friction stir welding of a double skin panel made of an extruded shape as exemplified here, but any double skin panel (for example, a honeycomb) having an outer plate and an inner plate that are substantially parallel to each other. Appropriate for friction stir welding of panels.

  In view of such circumstances, the present invention can perform friction stir welding flatly so that no step remains after joining even if there is a step between the outer surfaces in a state where the ends are butted together before joining. We propose a friction stir welding method for double skin panels.

  That is, the invention according to claim 1 includes a metal first outer plate and a first inner plate that are substantially parallel to each other, and the lattice is used to connect the first outer plate and the first inner plate. A first double skin panel on which an end portion of the first outer plate is supported; a second outer plate made of metal and a second inner plate substantially parallel to each other; and the end portion of the second outer plate is A friction stir welding method of a double skin panel for friction stir welding a second double skin panel formed so as to be deformable in a direction in which the distance between the second outer plate and the second inner plate is reduced, With the first outer plate and the second outer plate facing up, the end of the first outer plate and the end of the second outer plate are abutted, and the end of the first inner plate and the second outer plate Arrange the end of the two inner plates to face each other and push the rotary tool into the butt from above to join The distance between the second outer plate and the second inner plate is the end of the second outer plate so that the outer surface of the first outer plate and the outer surface of the second outer plate are flat. The first double skin panel and the second double skin panel are friction stir welded while being deformed in a decreasing direction and supporting the pressing force of the rotary tool with the lattice.

  According to a second aspect of the present invention, the first outer plate and the first inner plate, which are substantially parallel to each other, are provided, and the first outer plate and the first inner plate are connected by the lattice connecting the first outer plate and the first inner plate. A first double-skin panel in which an end portion of the outer plate is supported and a first engagement portion is formed at the end portion of the first outer plate; and a second metal plate substantially parallel to each other An outer plate and a second inner plate, wherein an end of the second outer plate is formed so as to be deformable in a direction in which the distance between the second outer plate and the second inner plate is reduced, and A friction stir welding method for a double skin panel comprising friction stir welding of a second double skin panel having a second engagement portion formed at an end of a second outer plate, wherein the first outer plate and the first skin With the two outer plates facing up, the end of the first outer plate and the end of the second outer plate are butted together, The end of one inner plate and the end of the second inner plate are abutted against each other, and a rotary tool is pushed into the abutting portion from the upper side so that the outer surface of the first outer plate being joined and the outer surface of the second outer plate are The end portion of the second outer plate is deformed in a direction in which the distance between the second outer plate and the second inner plate is reduced so that the side surface becomes flat, and the first engaging portion and the second The first double skin panel and the second double skin panel are friction stir welded while engaging with an engaging portion and supporting the pressing force of the rotating tool with the lattice.

  The invention according to claim 3 is the friction stir welding method of the double skin panel according to claim 1 or 2, wherein the thickness of the end portion of the first outer plate and the end portion of the second outer plate is increased. A ridge protruding in the vertical direction is formed.

  The invention according to claim 4 is provided with a first outer plate and a first inner plate made of metal that are substantially parallel to each other, and wherein the first outer plate and the first inner plate are connected by the lattice that connects the first outer plate and the first inner plate. A first double skin panel on which an end portion of the inner plate is supported; a second outer plate made of metal and a second inner plate that are substantially parallel to each other; A friction stir welding method for a double skin panel, wherein the second double skin panel is formed so as to be deformable in a direction in which the distance between the two outer plates and the second inner plate is reduced. With the one inner plate and the second inner plate facing up, the end portion of the first outer plate and the end portion of the second outer plate are abutted, and the end portion of the first inner plate and the second inner plate The end of the plate is abutted and placed, and the rotary tool is pushed into the abutting part from above to In order that the outer surface of the inner plate and the outer surface of the second inner plate become flat, the end of the second inner plate is set in a direction in which the distance between the second outer plate and the second inner plate becomes smaller. The first double skin panel and the second double skin panel are friction stir welded while being deformed and supporting the pressing force of the rotating tool with the lattice.

  The invention according to claim 5 includes a first outer plate and a first inner plate that are substantially parallel to each other, and the first outer plate and the first inner plate are connected by the lattice that connects the first outer plate and the first inner plate. A first double-skin panel in which an end portion of the inner plate is supported and a first engagement portion is formed at the end portion of the first inner plate; and a second metal plate substantially parallel to each other An outer plate and a second inner plate, wherein an end of the second inner plate is formed so as to be deformable in a direction in which a distance between the second outer plate and the second inner plate is reduced, and A friction stir welding method for a double skin panel comprising friction stir welding of a second double skin panel having a second engagement portion formed at an end of a second inner plate, wherein the first inner plate and the first inner plate With the two inner plates facing up, the end of the first outer plate and the end of the second outer plate are butted together, The end of one inner plate and the end of the second inner plate are abutted against each other, and a rotary tool is pushed into the abutting portion from the upper side so that the outer surface of the first inner plate being joined and the outer side of the second inner plate are The end portion of the second inner plate is deformed in a direction in which the distance between the second outer plate and the second inner plate is reduced so that the side surface becomes flat, and the first engagement portion and the second The first double skin panel and the second double skin panel are friction stir welded while engaging with an engaging portion and supporting the pressing force of the rotating tool with the lattice.

  The invention according to claim 6 is the friction stir welding method for a double skin panel according to claim 4 or claim 5, wherein the thickness of the end portion of the first inner plate and the end portion of the second inner plate is increased. A ridge protruding in the vertical direction is formed.

  The invention according to claim 7 is the friction stir welding method for a double skin panel according to any one of claims 1 to 6, wherein the first double skin panel and the second double skin panel are made of aluminum. It is characterized by comprising an extruded shape made of an alloy.

  In the present invention, “substantially parallel to each other” means that the outer plate and the inner plate are strictly in addition to the state in which the outer plate and the inner plate are completely parallel, as well as unavoidable manufacturing errors. It includes a state in which the outer plate and the inner plate are slightly inclined from the beginning, and a state in which the outer plate and the inner plate are slightly inclined rather than parallel.

  In the friction stir welding method for double skin panels according to the present invention, the ends of the outer plates of the double skin panel and the ends of the inner plates are butted together, and a rotary tool is pushed into the butted portion from the outside, either between the outer plates or the inner plates. They are friction stir welded together. Then, even before joining, the outer skin and the inner skin of each double skin panel are slightly inclined or the thicknesses of both double skin panels are slightly different. Even if there is a step between the outer side surfaces, the outer plates are adjusted so that there is no step between the outer side surfaces of both outer plates and the outer side surfaces of both inner plates, and there is no step between the outer side surfaces. Alternatively, the inner plates can be friction stir welded. Of course, the outer plate and the inner plate are intentionally inclined slightly from the beginning so that the outer surfaces of the outer plates and the outer surfaces of the inner plates become flat after joining. You may dare to make the thickness slightly different.

  Therefore, according to the friction stir welding method for a double skin panel according to the present invention, the appearance of the product is improved, and the yield can be significantly improved.

  Also, during friction stir welding, the metal in the portion where the rotary tool is pushed out slightly flows out, but the protruding ridge (thick part) protruding in the thickness direction is along the end of the outer plate and the end of the inner plate. If it is formed, the metal from which the excess metal of the ridges flows out is replenished, so that no bonding failure occurs and the appearance after bonding is improved. The ridges may be formed outward or inward.

  Also, if the engaging portions are formed at the end of the outer plate and the end of the inner plate of each double skin panel, when the ends of the pair of double skin panels are brought into contact with each other and friction stir welded, Since both panels can be positioned in a state in which the outer surfaces of the outer plates and the outer surfaces of the inner plates are flat, stable bonding is possible.

  According to the present invention, even if there is a step between the outer surfaces in a state in which the double skin panels are butted against each other before joining, it is possible to perform friction stir welding flatly so that the step does not remain after joining. Therefore, the appearance of the product is improved, and the yield can be significantly improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same reference numerals are used for the same elements, and duplicate descriptions are omitted.

  FIG. 1 is a perspective view showing a first reference embodiment of a double skin panel. As shown in the figure, one panel 10 is an aluminum alloy hollow extruded shape member, and includes an outer plate 11 and an inner plate 12 that are substantially parallel to each other, and lattices 13, 13,. Furthermore, connecting portions 14 are formed at the joint end. This panel 10 and the other panel 20 that are abutted at the ends and friction stir welded are the same, and the outer plate 21, the inner plate 22, the lattices 23, 23,... I have. The connection portion 14 of the panel 10 has a circular arc shape that connects the end portion of the outer plate 11 and the end portion of the inner plate 12. Similarly, the connection portion 24 of the panel 20 is connected to the end portion of the outer plate 21 and the inner plate. The cross-sectional arc shape connects the end portions of 22.

  In order to frictionally stir and join the panel 10 and the panel 20 with each other at the ends, first, as shown in FIG. 2A, the outer plates 11 and 21 are placed on a flat joining table (not shown). With the side facing up, the ends of the panels 10 and 20 are butted together and fixed. At this time, the end portion of the outer plate 11 and the end portion of the outer plate 21 are substantially in contact with each other to form a butt portion T1, and the end portion of the inner plate 12 and the end portion of the inner plate 22 are substantially in contact with each other. It is a butt portion T2. Actually, in this state, the thicknesses of the panels 10 and 20 are slightly different due to inevitable manufacturing errors and the like, and a step is generated between the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21. There are many. There are various types of steps, from extremely large ones to small ones that cannot be discerned at first glance, but here the steps are shown extremely large for convenience of explanation. The same applies to the following.

  Next, as shown in FIG. 2B, the outer plates 11 and 21 of the panels 10 and 20 are friction stir welded from the outside. The rotary tool 30 for friction stir welding includes a large-diameter tool body 31 and a small-diameter stirring pin 32 that protrudes coaxially from the tip surface of the tool body 31. A shoulder portion 33 is formed. Using such a rotating tool 30, the stirring pin 32 of the rotating tool 30 that rotates at high speed around the central axis is inserted into the butting portion T1 from the outside (upper side in the drawing) of the outer plates 11 and 21, and the shoulder portion. 33 is slightly pressed against the outer surfaces 11a and 21a of the outer plates 11 and 21, and the rotary tool 30 is moved in the direction orthogonal to the paper surface along the butting line of the outer plates 11 and 21, thereby The butt portion T1 is friction stir welded from the outside.

  At the time of friction stir welding, an inward pressing force (downward in the drawing) from the rotary tool 30 acts on the abutting portion T1 of the panels 10 and 20, and this pressing force is supported by the connecting portions 14 and 24. Here, since the connection parts 14 and 24 have a circular arc shape and are relatively easy to bend in the thickness direction of the panels 10 and 20 (vertical direction in the figure), the inward pressing force from the rotary tool 30 is applied. The received connection portions 14 and 24 are bent and deformed so that the outer side surface 11a of the outer plate 11 of the panel 10 and the outer side surface 21a of the outer plate 21 of the panel 20 become flat. That is, during joining, the outer plates 11 and 21 and the inner plates 12 and 22 are basically not deformed and the connecting portions 14 and 24 are deformed to absorb the step, and the bending amount of the connecting portion 14 is determined by the connection amount. The amount of deflection of the portion 24 is added to the level difference. Therefore, the abutting portion T1 can be joined while absorbing the step between the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21 by the bending deformation of the connecting portions 14 and 24. FIG. As shown in (c), the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21 become substantially flat.

  Next, as shown in FIG. 3A, the panels 10 and 20 to which the outer plates 11 and 21 are joined are turned upside down so that the inner plates 12 and 22 face up. Part T2 is friction stir welded from the outside. When the panels 10 and 20 are turned upside down after the outer plates 11 and 21 are joined, there is no step between the outer surface 12a of the inner plate 12 and the outer surface 22a of the inner plate 22, and the surface becomes flat. However, even if there is a step that is not flat, it absorbs the step by bending deformation of the connection portions 14 and 24 as in the case of the friction stir welding of the butted portions T1 of the outer plates 11 and 21. What is necessary is just to join the butt | matching part T2. FIG. 3B shows a state after the joining of the butt portion T2.

  Thus, the thickness of the panel 10 before joining and the thickness of the panel 20 are slightly different due to inevitable manufacturing errors, etc., and between the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21, Even if there is a step between the outer surface 12 a of the inner plate 12 and the outer surface 22 a of the inner plate 22, the connecting portions 14 and 24 that connect the outer plates 11 and 21 and the inner plates 12 and 22 are deformed. By supporting the inward pressing force from the rotary tool 30, during and after joining, between the outer surface 11 a of the outer plate 11 and the outer surface 21 a of the outer plate 21, the outer surface 12 a of the inner plate 12 The level difference between the inner plate 22 and the outer surface 22a can be eliminated and the inner plate 22 can be made flat.

Here, after joining the butting portion T1, the panels 10 and 20 are turned upside down to join the butting portion T2. However, as shown in FIG. 4, the butting portion T1 and the butting portion T2 are joined simultaneously. It may be.
In the reference embodiment, it is assumed that the thicknesses of the panels 10 and 20 are different due to unavoidable manufacturing errors. However, of course, the thicknesses of the panels 10 and 20 are slightly different from the beginning. You may leave it.

  Subsequently, a second reference embodiment of the double skin panel will be described. In the first reference embodiment, the outer plate 11 and the inner plate 12 of the panel 10 are parallel, the outer plate 21 and the inner plate 22 of the panel 20 are parallel, and the thicknesses of the panels 10 and 20 are slightly different. However, in this reference embodiment, as shown in FIG. 5, the outer plate 11 and the inner plate 12 are slightly inclined so that the thickness of the panel 10 gradually increases toward the end portion. 21 and the inner plate 22 are slightly inclined so that the thickness of the panel 20 is gradually increased toward the end, and a step is generated in the butted portion in a state where the panels 10 and 20 are butted against each other. Yes. Also in such a case, the outer surface of the outer plate 11 is joined during and after joining by adjusting and supporting the pressing force of the rotary tool 30 by the connecting portions 14 and 24 that can be flexibly deformed as in the first reference embodiment. 11a and the outer surface 21a of the outer plate 21, and the step between the outer surface 12a of the inner plate 12 and the outer surface 22a of the inner plate 22 can be made flat.

  FIG. 6 is a sectional view showing a third reference embodiment of the double skin panel. This reference embodiment is substantially the same as the first reference embodiment except that the connecting portions 14 and 24 do not connect the end portions of the outer plates 11 and 21 and the end portions of the inner plates 12 and 22. Is different. That is, the connecting portions 14 and 24 of the present embodiment connect a position slightly away from the ends of the outer plates 11 and 21 and a position slightly away from the ends of the inner plates 12 and 22. Even in this case, as in each of the above-described reference embodiments, the pressing force of the rotary tool 30 is adjusted and supported by the connecting portions 14 and 24 that can be flexibly deformed. Steps between the side surface 11a and the outer surface 21a of the outer plate 21 and between the outer surface 12a of the inner plate 12 and the outer surface 22a of the inner plate 22 can be eliminated and flattened.

Fig.7 (a) is sectional drawing showing 4th reference embodiment of a double skin panel. In the present embodiment, the end portions of the outer plates 11 and 21 are formed with engagement portions 11b and 21b having a joint shape, and the engagement portions 11b and 21b are engaged with each other. The outer surfaces 11a and 21a of the outer plates 11 and 21 are flat. Similarly, the end portions of the inner plates 12 and 22 are respectively formed with engagement portions 12b and 22b having a joint shape, and the inner plates 12 and 22 are engaged with each other with the engaging portions 12b and 22b engaged with each other. The outer side surfaces 12a and 22a are flat. That is, the engaging portions 11b, 21b, 12b, and 22b play a role of positioning.
Therefore, for example, in the case of the figure, the connecting portion 14 is bent inward by the pressing force transmitted from the rotary tool 30 during joining, and the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21 are flattened. Since the engaging portions 11b and 21b are engaged with each other and positioned in this state and are not displaced after that, the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21 are The posture when the friction stir welding is performed in a flat state is stable, and the step can be eliminated accurately and reliably.

  FIG. 7B is a cross-sectional view illustrating a fifth reference embodiment of the double skin panel. This reference embodiment is the same as the fourth reference embodiment except that the engaging portions 11b, 21b, 12b, and 22b are tapered.

FIG. 8A is a cross-sectional view illustrating a sixth reference embodiment of the double skin panel. In the present embodiment, ridges (thick portions) 11c and 21c that protrude outward in the thickness direction along the end portions of the outer plates 11 and 21 are formed.
When the rotary tool 30 is pushed into the abutting portions of the outer plates 11 and 21 and the friction stir welding is performed without the protrusions 11c and 21c, the metal of the abutting portion is plastically flowed and pushed inward, and a hole is formed in the abutting portion. May occur, resulting in poor bonding, or the butt portion may be recessed and the appearance may be poor. However, if the ridges 11c and 21c are formed as in the present embodiment, the excess metal of the ridges 11c and 21c supplements the metal that has been swept away. It is possible to perform good bonding without causing the appearance to be good without denting the butted portion after bonding. If there is an unnecessary portion protruding on the outer surface 11a, 21a of the outer plate 11, 21 after joining, it is cut and flattened using a grinder or the like. Here, although the ridges 11c and 21c are formed at the ends of the outer plates 11 and 21, of course, the ridges can also be formed at the ends of the inner plates 12 and 22.

FIG. 8B is a cross-sectional view illustrating a seventh reference embodiment of the double skin panel. This reference embodiment is the same as the sixth reference embodiment in that ridges 11c and 21c protruding in the thickness direction along the end portions of the outer plates 11 and 21 are formed, but the ridges 11c, The difference is that 21c protrudes inward. That is, in this reference embodiment, the thickness and thickness of the connecting portions 14 and 24 that connect the end portions of the outer plates 11 and 21 and the end portions of the inner plates 12 and 22 intersect with the outer plates 11 and 21 and the inner plate. 12 and 22, which are large at the portions intersecting with the ends of the outer plates 11 and 21 and projecting inward in the thickness direction along the ends of the outer plates 11 and 21 and along the ends of the inner plates 12 and 22. The protrusions 12c and 22c protrude inward in the thickness direction.
Therefore, the metal of the volume swept away at the time of friction stir welding is supplemented by the extra metal of the ridges 11c, 21c, 12c, and 22c, and good bonding can be performed without generating holes in the butted portions.

  In the sixth reference embodiment and the seventh reference embodiment, the ridges 11c, 21c, 12c, and 22c are integrally formed with the connecting portions 14 and 24, but it goes without saying that these may be formed separately. Yes.

  FIG. 9 is a sectional view showing an eighth reference embodiment of the double skin panel according to the present invention. In each reference embodiment, the connection portions 14 and 24 have a circular arc shape in cross section. However, in the present reference embodiment, the connection portions 14 and 24 have a cross-sectional shape. Other points are the same as those in the above-described reference embodiments.

  FIG. 10 is a cross-sectional view showing an embodiment of a double skin panel according to the present invention. The panel of the first to seventh reference embodiments has a structure that absorbs a step by deforming the connecting portion without deformation of the outer plate and the inner plate during joining. Is a structure which absorbs a level | step difference by deform | transforming an outer plate or an inner plate during joining. That is, in the panel of the present embodiment, the end portions of the outer plates 11 and 21 or the end portions of the inner plates 12 and 22 can be deformed inward, and this is used to make a pair of double skin panels 10 and 20. The steps between the outer surfaces 11a and 21a of the outer plates 11 and 21 and the steps between the outer surfaces 12a and 22a of the inner plates 12 and 22 are eliminated.

  Here, as shown in FIG. 10 (a), one panel 10 is a hollow extruded profile made of aluminum alloy, and an outer plate 11 and an inner plate 12 that are substantially parallel to each other, and a lattice 13 that connects them. .., And the other panel 20 similarly includes an outer plate 21 and an inner plate 22, and lattices 23, 23,. The end of the inner plate 12 of the panel 10 is formed so as to be able to bend and deform inward (upward in the drawing), and the end of the outer plate 21 of the panel 20 is also formed to be able to bend and deform inward (downward in the drawing). Has been. Engaging portions 11b and 21b are formed at the ends of the outer plates 11 and 21, and engaging portions 12b and 22b are formed at the ends of the inner plates 12 and 22, respectively.

  In order to abut the panel 10 and the panel 20 at the end portions and friction stir weld, first, the outer plates 11 and 21 are placed on a flat joining table (not shown), and the panels 10 and 20 are placed. The end portions of each other are butted and fixed. At this time, the engaging portions 12b and 22b are engaged with each other, and there is no step between the outer surfaces 12a and 22a of the inner plates 12 and 22, but the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21. It is assumed that there is an inevitable step between the two.

  Next, as shown in FIG. 10B, the outer plates 11 and 21 of the panels 10 and 20 are friction stir welded from the outside. During the friction stir welding, an inward pressing force transmitted from the rotary tool 30 acts on the abutting portion T1 of the panels 10 and 20. At this time, the end portion of the outer plate 21 that has received the pressing force transmitted from the rotary tool 30 faces inward as if a concentrated load is applied to the tip of the cantilever beam (see FIG. 11). When the engaging portions 11b and 21b are engaged with each other, there is no step between the outer surfaces 11a and 21a of the outer plates 11 and 21, and the surface becomes substantially flat. Therefore, the abutting portion T1 can be joined while absorbing the step between the outer surface 11a of the outer plate 11 and the outer surface 21a of the outer plate 21 by the inward bending deformation of the end portion of the outer plate 21. There will be no steps later. Similarly, the abutting portion T2 of the inner plates 12 and 22 may be joined by friction stir welding while absorbing the inward bending deformation of the inner plate 12.

  If attention is paid to the panel 20 here, only the end portion of the outer plate 21 is deformed inward and the end portion of the inner plate 22 is not deformed inward. Thus, the structure which both the edge part of the outer plate 21 and the edge part of the inner board 22 deform | transform inward may be sufficient. That is, it is only necessary that one or both of the end portion of the outer plate and the end portion of the inner plate be deformed inward with respect to one panel. As can be seen from FIG. 12, the butted portions T1 of the outer plates 11 and 21 and the butted portions T2 of the inner plates 12 and 22 are in the same vertical plane in a state where the ends of the panels 10 and 20 are butted together. It does not have to be positioned above, and may be displaced in the width direction of the panel.

  Further, as shown in FIG. 13, the engaging portions 11b, 21b, 12b, and 22b for positioning can be omitted. Furthermore, although not shown in the drawing, the ridges as described in the above reference embodiments may be formed along the end portions of the outer plates 11 and 21 and the end portions of the inner plates 12 and 22.

The embodiment of the present invention has been described above. However, the present invention is not limited to this embodiment, and appropriate modifications according to the gist of the invention, such as appropriately combining technical elements in each of the above-described reference embodiments. Needless to say, this is possible.
More specifically, the cross-sectional shapes of the pair of panels need not be symmetrical. The lattice can be freely determined in shape, size, position, material, etc., and may not be required. The metal composition of the outer plate and the inner plate may be the same or different. The panel is not limited to an extruded shape, and may be a honeycomb panel or the like as long as it is a double skin panel including two parallel plates.

It is a perspective view showing the first reference embodiment of a double skin panel. It is a procedure sectional view for explaining one reference embodiment of a method of carrying out friction stir welding of the panel of Drawing 1. FIG. 3 is a procedure sectional view following FIG. 2. It is sectional drawing for demonstrating other reference embodiment of the method of carrying out friction stir welding of the panel of FIG. It is sectional drawing showing 2nd reference embodiment of a double skin panel. It is sectional drawing showing 3rd reference embodiment of a double skin panel. (A), (b) is sectional drawing showing 4th reference embodiment and 5th reference embodiment of a double skin panel, respectively. (A), (b) is sectional drawing showing the 6th reference embodiment and the 7th reference embodiment of a double skin panel, respectively. It is sectional drawing showing 8th reference embodiment of a double skin panel. It is sectional drawing showing embodiment of the friction stir welding method of the double skin panel which concerns on this invention. It is the principal part enlarged view. It is sectional drawing showing other embodiment of the friction stir welding method of the double skin panel which concerns on this invention. It is sectional drawing showing further another embodiment of the friction stir welding method of the double skin panel which concerns on this invention. It is sectional drawing explaining the friction stir welding method of the conventional double skin panel. It is sectional drawing explaining the problem of the friction stir welding method of the conventional double skin panel.

Explanation of symbols

10, 20 Double skin panel 11, 21 Outer plate 11a, 21a Outer side surface 11b, 21b Engagement part 11c, 21c Protrusion 12, 22 Inner plate 12a, 22a Outer side surface 12b, 22b Engagement part 12c, 22c Protrusion 13, 23 Lattice 14, 24 Connection portion 15, 25 Vertical support plate 30 Rotating tool 31 Tool body 32 Stirring pin 33 Shoulder portion D Steps T1, T2 Butting portion

Claims (7)

A first outer plate and a first inner plate that are substantially parallel to each other are provided, and an end portion of the first outer plate is supported by a lattice that connects the first outer plate and the first inner plate. A first double skin panel, a second outer plate and a second inner plate made of metal substantially parallel to each other, and an end portion of the second outer plate is connected to the second outer plate and the second inner plate. A friction stir welding method for a double skin panel that friction stir welds the second double skin panel formed so as to be deformable in a direction in which the distance to the plate decreases,
With the first outer plate and the second outer plate facing up, the end of the first outer plate and the end of the second outer plate are abutted, and the end of the first inner plate and the second outer plate Arrange the two inner plates end to face,
A rotary tool is pushed into the butting portion from above, and the end portion of the second outer plate is made to be flat so that the outer surface of the first outer plate being joined and the outer surface of the second outer plate are flattened. The first double skin panel and the second double skin panel are rubbed while the distance between the two outer plates and the second inner plate is reduced and the pressing force of the rotary tool is supported by the lattice. A friction stir welding method for double skin panels, characterized by stir welding. A first outer plate and a first inner plate that are substantially parallel to each other are provided, and an end portion of the first outer plate is supported by a lattice that connects the first outer plate and the first inner plate. And a first double skin panel having a first engaging portion formed at an end of the first outer plate, and a metal second outer plate and a second inner plate that are substantially parallel to each other. Provided, and an end portion of the second outer plate is formed so as to be deformable in a direction in which a distance between the second outer plate and the second inner plate is reduced, and at an end portion of the second outer plate. A friction stir welding method for a double skin panel that friction stir welds a second double skin panel in which a second engagement portion is formed,
With the first outer plate and the second outer plate facing up, the end of the first outer plate and the end of the second outer plate are abutted, and the end of the first inner plate and the second outer plate Arrange the two inner plates end to face,
A rotary tool is pushed into the butting portion from above, and the end portion of the second outer plate is made to be flat so that the outer surface of the first outer plate being joined and the outer surface of the second outer plate are flattened. The second outer plate and the second inner plate are deformed in a direction in which the distance is reduced, and the first engaging portion and the second engaging portion are engaged, and the pressing force of the rotary tool is supported by the lattice. The method for friction stir welding of a double skin panel, wherein the first double skin panel and the second double skin panel are friction stir welded.   The double skin panel according to claim 1 or 2, wherein ridges projecting in a thickness direction are formed at an end of the first outer plate and an end of the second outer plate. Friction stir welding method. A first outer plate and a first inner plate that are substantially parallel to each other are provided, and an end portion of the first inner plate is supported by a lattice that connects the first outer plate and the first inner plate. A first double skin panel, a second outer plate and a second inner plate made of metal substantially parallel to each other, and an end of the second inner plate is connected to the second outer plate and the second inner plate. A friction stir welding method for a double skin panel that friction stir welds the second double skin panel formed so as to be deformable in a direction in which the distance to the plate decreases,
With the first inner plate and the second inner plate facing up, the end portion of the first outer plate and the end portion of the second outer plate are abutted, and the end portion of the first inner plate and the second inner plate Arrange the two inner plates end to face,
A rotary tool is pushed into the butting portion from above, and the end portion of the second inner plate is placed on the first inner plate so that the outer surface of the first inner plate being joined and the outer surface of the second inner plate are flattened. The first double skin panel and the second double skin panel are rubbed while the distance between the two outer plates and the second inner plate is reduced and the pressing force of the rotary tool is supported by the lattice. A friction stir welding method for double skin panels, characterized by stir welding. A first outer plate and a first inner plate that are substantially parallel to each other are provided, and an end portion of the first inner plate is supported by a lattice that connects the first outer plate and the first inner plate. And a first double skin panel in which a first engagement portion is formed at an end of the first inner plate, and a metal second outer plate and a second inner plate that are substantially parallel to each other. Provided, and an end portion of the second inner plate is formed so as to be deformable in a direction in which a distance between the second outer plate and the second inner plate is reduced, and at an end portion of the second inner plate A friction stir welding method for a double skin panel that friction stir welds a second double skin panel in which a second engagement portion is formed,
With the first inner plate and the second inner plate facing up, the end portion of the first outer plate and the end portion of the second outer plate are abutted, and the end portion of the first inner plate and the second inner plate Arrange the two inner plates end to face,
A rotary tool is pushed into the butting portion from above, and the end portion of the second inner plate is placed on the first inner plate so that the outer surface of the first inner plate being joined and the outer surface of the second inner plate are flattened. The second outer plate and the second inner plate are deformed in a direction in which the distance is reduced, and the first engaging portion and the second engaging portion are engaged, and the pressing force of the rotary tool is supported by the lattice. The method for friction stir welding of a double skin panel, wherein the first double skin panel and the second double skin panel are friction stir welded.   6. The double skin panel according to claim 4, wherein protrusions protruding in a thickness direction are formed at an end portion of the first inner plate and an end portion of the second inner plate. Friction stir welding method.   The friction stir welding of a double skin panel according to any one of claims 1 to 6, wherein the first double skin panel and the second double skin panel are made of an extruded shape made of an aluminum alloy. Method.

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