JP3289779B2 - Method for producing hollow panel structure and hollow extruded profile for the production - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a hollow panel structure
With regard to the method of manufacturing and hollow extruded shape for the production thereof, in particular,
The present invention relates to a method for producing a hollow panel structure made of an aluminum-based material such as aluminum and an aluminum alloy, and an aluminum-based hollow extruded shape for the production.

[0002]

2. Description of the Related Art Truck tilts and the like are usually manufactured by fitting a plurality of aluminum-based hollow extruded shapes to each other. As a technique using friction stir welding to improve the watertightness of the structure constructed by fitting in this way,
There is one proposed in Japanese Patent Application No. 10-158190 (Japanese Patent Application Laid-Open No. 11-350616) previously filed by the present applicant.

[0003] Further, in the manufacture of a wide two-sided hollow panel structure used as a structure of a railway vehicle requiring high strength, a rib extending in the length direction is formed between a pair of front and back parallel face plates. Using multiple aluminum-based hollow extrusions,
As an example of applying friction stir welding to the joining, there is a technique disclosed in Japanese Patent Application Laid-Open No. 9-309164. The technology disclosed in this publication includes the following.

(A) As shown in FIGS. 23 (a) and 23 (b), the front and back face plates 133, 134 are connected to each other, and the front and back face plates 133, 134 are connected to each other in the length direction (perpendicular to the plane of the drawing). ), And a pair of hollow extruded members 131 and 13 each of which comprises a vertical rib 136 connecting the ends of the front and rear face plates 133 and 134 and extending in the length direction.
2, the outer surfaces of the vertical ribs 136 and 136 are abutted to each other to form an abutting portion, and a rotating body 151 having a concave bottom surface 153 and a rotating body 151 coaxially protruding outward from the rotating body 151 from the concave bottom surface 153. The butting portion is friction stir welded from the surface side using a rotary tool 150 including a stirring pin 152. Thereafter, the two-sided hollow panel structure joined on the front side is inverted, and the butted portions are friction stir welded from the back side.

(B) As shown in FIGS. 24 (a) and 24 (b), the front and back face plates 133, 134 are connected to each other, and the front and back face plates 133, 134 are connected to each other in the length direction (perpendicular to the drawing paper). ), A hollow extruded profile 131 composed of a slanted rib 135 extending in a vertical direction, a vertical rib 136 connecting the ends of the front and back face plates 133 and 134 and extending in the length direction, and ends of the front and back face plates 133 and 134. When joining the hollow extruded profile 132 without the vertical rib 136 extending in the length direction by joining the portions, the vertical corners of the vertical rib 136 of the hollow extruded profile 131 are connected to the front and back of the other hollow extruded profile 132. The thickness direction of the hollow extruded profile 131 and the direction orthogonal thereto (the hollow extruded profile 132) so that the tips of the projections 138u, 138b at the ends of the face plates 133, 134 can be placed.
Notches 133a and 134a open to the side (side) are formed in advance. With the tips of the protruding pieces 138u and 138b placed on the notched portions 133a and 134a, the butting portion is formed using the rotary tool 150 as described in the above (A). And friction stir welding from each side.

(C) There is a technique shown in FIG. 25 that can join the upper and lower surfaces from only one side. That is, the face plate 134 on the lower surface of the hollow extruded members 131, 132,
Projecting pieces 134a, 134a protrude largely toward the other hollow extruded profile from the same plane as 134, respectively. Protruding piece 1
The tips of 34a and 134a are substantially in contact with each other. The tips of the upper face plates 133 and 133 are the lower face plate 1
The projecting pieces 134a of the projections 34, 134 are located rearward of the tips of the projections 134a. The front ends of the upper face plates 133 and 133 and the lower face plates 134 and 134 are perpendicular ribs 136 and 1.
36. Vertical ribs 136,136
Is connected in the middle of the lower face plates 134, 134. At the top of the vertical ribs 136, 136, a joint 1 with a T-shaped vertical section
There are notches 139 and 139 where 60 overlaps. Fitting 1
When 60 is placed on the notches 139, 139, the joint 1
The upper surface of the upper surface plate 160u of the 60
33 is the same as the upper surface. Two vertical ribs 136,1
The interval between the 36 is large enough to insert the rotary tool 150, and is preferably as small as possible. The friction stir welding procedure is as follows.

1) In the state shown in FIG.
The projections 134 of the lower face plates 134, 134
a, 134a are joined together. At this time, the hollow extruded members 131 and 132 are placed on a bed (not shown) including the joints of the projecting pieces 134a and 134a. The top surface of the joint bed (joint backing) is flat. The height of the stirring pin 152 of the rotary tool 150 is
4a.

2) A joint 160 is placed between a pair of hollow extruded members 131 and 132 as shown in FIG. Both ends of the upper plate 160u of the joint 160 are connected with vertical ribs 136,1.
36 when it is superimposed on the cutouts 139 and 139 at the upper end,
The lower end of the vertical piece 161 has a gap with the joint 145 of the lower face plate. The vertical piece 161 may not be provided.

3) As shown in FIG.
Of the upper extruded plate 160u and the hollow extruded profile 131 are friction stir welded by the rotary tool 150.

4) As shown in FIG.
The butting portion between the upper surface plate 160u and the hollow extruded profile 132 is friction stir welded by the rotary tool 150.

(D) As a technique in which upper and lower face plates of hollow extruded members 131 and 132 are simultaneously subjected to friction stir welding, there is a technique shown in FIG. Upper face plate 133, 1
A rotary tool 150b for connecting the lower face plates 134, 134 is disposed vertically below the rotary tool 150u for friction stir welding the 33 from above. Rotation tool 15
The stirring pin 152b of Ob faces upward. The two rotating tools 150u and 150b are moved at the same speed in a state where they face each other, and friction stir welding is performed simultaneously at the top and bottom. The rotation centers of the rotary tools 150u and 150b are on the same line, and the joint of the hollow extruded sections 131 and 132 is on this line.

[0012]

A hollow panel structure manufactured by fitting a hollow extruded member like the above-mentioned truck tilt has poor strength and watertightness in order to be applied as a structure. If it is used in a place where vibration is imparted to the fitting portion, there is a problem that a frictional noise is generated at the fitting portion.

In the watertight structure proposed in Japanese Patent Application No. 10-158190 (Japanese Patent Application Laid-Open No. 11-350616), although the watertightness is improved, the joint strength and the suppression of frictional noise are insufficient. . The reason why the bonding strength is insufficient is
This is because the junction depth is very shallow.

The double-sided hollow panel structure, the friction stir welding method and the panel disclosed in Japanese Patent Application Laid-Open No. 9-309164 can solve the above problem, but have the following problems.

That is, the techniques described in the above items (A) and (B) have the following problems. (1) It is necessary to perform friction stir welding on both the front and back surfaces, and after performing friction stir welding on one surface from above, it is necessary to invert the hollow panel structure. Therefore, productivity is low and manufacturing cost increases. (2) When friction stir welding is performed on both front and back surfaces, an undercut trace with an arc-shaped pattern generated by the rotation and movement of the bottom surface of the rotating tool remains on both surfaces. It is necessary to form the outer surfaces on both sides of the part in advance so as to be slightly higher than the surrounding surface, and to perform grinding and polishing so that the undercut trace disappears after the friction stir welding. For this reason, the number of processes increases, the productivity decreases, and the equipment cost, running cost, maintenance cost, etc. of the grinding / polishing processing equipment increase. (3) In order to prevent the joints from opening due to friction stir welding to prevent joint defects, it is necessary to restrain both sides in the width direction with an appropriate restraining force. Requires a stir welding device. (4) Deformation and buckling of the rib due to the pressing force applied to the upper surface of the butted portion by the friction stir welding rotary tool in the axial direction, that is, the hollow portion side, or heat on the inner peripheral surface side of the vertical rib on both sides of the butted portion. There is a problem of occurrence of joint defects due to deformation, and in order to prevent the occurrence of such joint defects, the pressing force, the shape and dimensions of the ribs, the specifications of the friction stir welding rotary tool and the welding depth Some countermeasures were necessary, such as examining and deciding them in relation to each other. (5) In the case where three or more hollow extruded members are joined to each other in the width direction at the time of manufacturing a wide hollow panel structure, the number of butted portions on both front and back surfaces is the same. Very high, further reducing productivity and increasing manufacturing costs. Also, there is large mechanical deformation caused by thermal deformation or inversion after friction stir welding on the upper surface side. (6) the (2) due to the section in question, before stir welding rubbing friction, pre-anodizing treatment decorative surface and comprising a surface in the product of the hollow panel structure, such as electrolytic coloring treatment and electrodeposition coating process There is a problem in performing surface treatment.On the other hand, when the above-mentioned grinding and polishing treatment is performed after friction stir welding, and then these treatments are performed, since the material is a wide material, large processing equipment is required. Required, which increases equipment costs and maintenance costs. Also, there is a subtle difference in the surface state between the grinding / polishing part and other parts as they are extruded, and this subtle difference in the surface state is particularly significant in the case of anodic oxidation, electrolytic coloring, electrodeposition coating, etc. In the case of the treatment, a slight difference in the color tone and glossiness of the surface appears, and there is a problem in the appearance of the product.

In order to solve the problems of the above items (2) and (6), the technique described in the above item (C) has been proposed. However, this technique has the following problems. . (A) Joint 160 having a T-shaped cross section or this joint 1
It is necessary to prepare a joint consisting only of the upper surface plate 160u from which the vertical piece 161 is omitted from 60, and to set this during the friction stir welding operation, which takes time and effort to manufacture and set the joint, which increases the manufacturing cost. (B) It is necessary to perform friction stir welding at three places and three times, so that the work time is long, the productivity is reduced, and the production cost is increased.

In order to solve the problem (1),
Although the technique described in the above section (D) has been proposed, not only the equipment cost including the control device and the maintenance cost are increased, but also the solid phase plasticized (plasticized) when friction stir welding is performed from below. Is likely to flow downward due to gravity, and a cavity defect is likely to occur at the upper part of the joint on the lower surface side.

The present invention solves the above-mentioned problems of the prior art and has the following objects. (1) The required portions of friction stir welding are reduced to half or 1/3, and even if the restraint in the width direction is omitted during friction stir welding, the joints are not opened and joint defects are not generated, and It is not necessary to manufacture and set a special joint for friction stir welding, and there is no trace of the undercut of rotation and movement of the rotary tool for friction stir welding on the decorative surface of the product, so grinding and polishing after joining Panel structure and method for manufacturing the same, which can dramatically improve the productivity even if ordinary friction stir welding equipment is used, and can reduce equipment cost, maintenance cost and manufacturing cost A first object is to provide a hollow extruded shape for the production thereof.

(2) At the time of friction stir welding, there is no occurrence of a joint defect due to thermal deformation of the inner peripheral surface side of the vertical rib on the hollow side of the butt portion and deformation / buckling of the minimum thickness portion of the vertical rib. A second object is to provide a method for manufacturing a hollow panel structure capable of obtaining a high bonding strength by obtaining a sufficient bonding depth, and to provide a hollow extruded shape for the manufacturing.

(3) A third object is to provide a method of manufacturing a hollow panel structure capable of friction stir welding of three or more hollow extruded members at the same time and capable of dramatically improving productivity.

(4) Before friction stir welding, anodizing, electrolytic coloring and electrodeposition can be applied to the decorative surface of the hollow extruded shaped product, and no large-scale processing equipment is required. A fourth object of the present invention is to provide a method for manufacturing a hollow panel structure and a hollow extruded member for manufacturing the hollow panel structure without increasing the equipment cost and the maintenance cost.

[0022]

The terms used in the claims and the following description are defined as follows. (1) The to-be-fitted portion is formed at or in the vicinity of the widthwise end of each hollow extruded profile, and is fitted to each other when joining the widthwise ends of a plurality of hollow extruded profiles. Part or member. Further, the fitting portion means a portion where fitting portions formed at or in the vicinity of individual widthwise ends of the plurality of hollow extruded members are mutually fitted and partially integrated. I do. (2) The butted portion is formed at the widthwise end of each hollow extruded shape, and when the widthwise ends of the plurality of hollow extruded shapes are joined to each other, they are butted against each other (substantially in contact with each other). Part or member). In addition, the butted portion is formed by abutting (substantially contacting) the butted portions formed at or near the respective widthwise ends of a plurality of hollow extruded profiles. Means part.

The hollow panel structure of the present invention has the first
In order to solve the above-mentioned problem, as a first means, a plurality of hollow extruded profiles are provided, each having a fitting portion formed at an end in the width direction of each hollow extruded profile, and a pair of front and back face plates. A friction stir welding portion is provided at a butt portion formed on one side of the first portion.

In the present invention, as a second means, a vertical rib for supporting the other butted portion is provided in the hollow portion immediately below one of the butted portions constituting the butting portion. Is desirable.

In the present invention, as a third means, each of the butted portions constituting the butted portion is
A vertical rib may be provided on one hollow portion side, and a vertical rib serving as a part of the fitted portion may be provided on the other hollow portion side.

The method for producing a hollow panel structure of the present invention comprises:
In order to solve the first and second problems, as a first means, in an extrusion process, a fitting portion is formed at a width direction end portion of a plurality of hollow extruded profiles, and a pair of front and back surfaces is formed. A butted portion is formed on one side of the face plate, and the fitted portions are fitted together to form a fitting portion, and the butted portions are butted together to form a butted portion. The parts are configured to be friction stir welded.

In the method of the present invention employing the first means, as the second means, in the extrusion step,
It is preferable that a vertical rib capable of supporting the other of the butted portions is formed on the hollow portion immediately below the one of the butted portions of the plurality of hollow extruded shapes.

In the method of the present invention employing the first means, as a third means, in the extrusion step,
A vertical rib is formed on one hollow portion side of each of the butted portions of the plurality of hollow extruded profiles, and a vertical rib serving also as a part of the fitted portion is formed on the other hollow portion side. You may leave.

In the method for manufacturing a hollow panel structure according to the present invention employing the second or third means, as a fourth means, when the friction stir welding of the butt portion is performed, the friction stirrer pushed into the butt portion is used. the shortest distance w ₁ between the inner peripheral surface of the hollow portion side of the vertical ribs of the outer surface and the butt portion of the stirring pin joining rotation tool it is desirable to keep more than 0.6 mm.

In the method of manufacturing a hollow panel structure according to the present invention employing the fourth means, the fifth means includes:
The shortest distance w ₁ between the outer surface of the stirring pin of the rotary tool for friction stir welding pressed into the butting portion and the inner peripheral surface of the vertical rib on the hollow side of the butting portion is preferably maintained at 1.2 mm or more. desirable.

In the method of manufacturing a hollow panel structure according to the present invention employing the above-described fourth means, the sixth means includes:
More preferably, friction stir welding is performed while cooling the inner peripheral surface of the vertical rib on the hollow portion side of the butting portion.

In the method of manufacturing a hollow panel structure according to the present invention employing any one of the fourth to sixth means, the seventh method
As a means of the above, the axial pressing force F (kgf) of the rotating tool and / or the diameter D (of the rotating tool bottom) are set so that the thickness w ₂ of the minimum thickness portion of the vertical rib satisfies the following formulas 1 and 2. mm) and it is desirable to perform friction stir welding. w ₂ ≧ w _2A = {(F × H) / (1439 × D)} ^1/3 / n Equation 1 w ₂ ≧ w _2B = F / (n × D × σ _0.2 ) —Equation 2 , W _2A : first deformation / buckling limit thickness (mm) w _2B : second deformation / buckling limit thickness (mm) F: axial pressing force (kgf) of rotating tool D: diameter of rotating tool bottom (Mm) σ _0.2 : proof stress of hollow extruded profile (kgf / mm ² ) H: height of hollow extruded profile, ie distance between outer surfaces of a pair of front and back face plates (mm) n: number of vertical ribs at butt portion ( 1 or 2)

In the method of manufacturing a hollow panel structure according to the present invention employing any one of the first to seventh means, in order to solve the third problem, as an eighth means, At the same time, a plurality of butt portions are formed using three or more hollow extruded shapes, and the plurality of butt portions are formed by using friction stir welding equipment having friction stir welding rotary tools equal to or more than the number of the butt portions. May be simultaneously subjected to friction stir welding.

In the method of manufacturing a hollow panel structure according to the present invention employing any one of the first to seventh means, in order to solve the fourth problem, ninth means is provided. Prior to the friction stir welding step, anodizing, electrolytic coloring, or electrodeposition coating is performed on the outer surface of the face plate of the plurality of hollow extruded members opposite to the face plate on which the butted portion is formed. It is better to keep it.

In the hollow extruded profile for manufacturing a hollow panel structure according to the present invention, as a first means for solving the first and second problems, a fitting portion is formed at an end in a width direction. And a butted portion is formed on one side of the pair of front and back face plates.

In the hollow extruded profile for manufacturing a hollow panel structure according to the present invention, as a second means, a butted portion on one side of each of the butted portions of a plurality of hollow extruded profiles is used. It is preferable that a vertical rib be formed on the hollow portion side so as to support the butted portion on the other side.

In the above-described hollow extruded profile for manufacturing a hollow panel structure according to the present invention, as a third means, a butted portion on one side of each of the butted portions of a plurality of hollow extruded profiles is provided. A vertical rib may be formed on the hollow portion side, and a vertical rib serving as a part of the fitted portion may be formed on the hollow portion side of the butted portion on the other side.

In the hollow extruded member for manufacturing a hollow panel structure according to the present invention employing the second or third means, as a fourth means, the abutted portions of a plurality of hollow extruded members are abutted. At a predetermined joining depth in the friction stir welding of the formed butting portion, the outer surface of the stirring pin of the rotary tool for friction stir welding to be pushed into the butting portion and the inner peripheral surface of the vertical rib on the hollow portion side of the butting portion. Shortest distance w between
It is desirable that they are formed in advance so that ₁ is maintained at 0.6 mm or more.

In the hollow extruded member for manufacturing a hollow panel structure according to the present invention employing the fourth means, as a fifth means, an outer surface of a stirring pin of a rotary tool for friction stir welding to be pushed into the butting portion. the shortest distance w ₁ between the inner peripheral surface of the hollow portion side of the vertical ribs of the butt portion and so as to maintain the above 1.2 mm, it is more desirable that the preformed.

In the hollow extruded member for manufacturing a hollow panel structure according to the present invention employing the above fourth or fifth means, as a sixth means, the thickness w ₂ of the minimum thickness portion of the rib is expressed by the following formula (1). It is desirable that the film be formed in advance so as to satisfy the following expression (2). w ₂ ≧ w _2A = {(F × H) / (1439 × D)} ^1/3 / n Equation 1 w ₂ ≧ w _2B = F / (n × D × σ _0.2 ) —Equation 2 , W _2A : first deformation / buckling limit thickness (mm) w _2B : second deformation / buckling limit thickness (mm) F: axial pressing force (kgf) of rotating tool D: diameter of rotating tool bottom (Mm) σ _0.2 : proof stress of hollow extruded profile (kgf / mm ² ) H: height of hollow extruded profile, ie distance between outer surfaces of a pair of front and back face plates (mm) n: number of vertical ribs at butt portion ( 1 or 2)

According to the hollow extruded member for manufacturing a hollow panel structure of the present invention employing any one of the above-mentioned first to sixth means, in order to solve the fourth problem, as a seventh means, Preferably, the outer surface of the face plate opposite to the face plate on which the butted portion is formed is previously subjected to anodizing treatment, electrolytic coloring treatment, or electrodeposition coating treatment prior to the friction stir welding step.

[0042]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the hollow panel structure of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view of a main part of the hollow panel structure of the present embodiment viewed from a longitudinal direction.

The hollow panel structure H according to the present embodiment
PS is, as shown in FIG.
And the lower fitting portions 1Aib, 1B formed at the widthwise ends 1A, 1B of the hollow extruded profiles 1, 1, respectively.
and a lower fitting portion 5b in which the ibs are fitted to each other.
Friction agitation is performed on a butted portion 2 in which butted portions 1Au and 1Bu formed on one side face plate 1up and 1Up of a pair of front and back face plates 1up and 1bp of the pair of hollow extruded profiles 1 and 1 are joined. The main part is configured with the joint 6.

The above embodiment further has the following specific configuration. That is, one butted portion 1Au
Is formed to be thicker than the upper face plate 1up, and a cutout 1Aun is formed on the top of the front end so that the front end of the other to-be-butted portion 1Bu is placed. A surface perpendicular to the outer surface of the upper face plate 1up of the notch 1Aun and a tip end surface of the butt portion 1B form a butt portion 2 (broken line in the figure), and the butt portion 2 is friction stir welded. A friction stir welding part 6 is formed.

A thick vertical rib 1Ar connecting the front and back face plates 1up and 1bp is formed at the base of the one to-be-butted portion 1Au. The butted portion 1Au is reinforced from below so as to prevent the butted portions 1Au, 1Bu from being deformed by an axial (downward) pressing force F pressed against the upper surfaces of the upper face plates 1up, 1up, and the hollow panel structure HPS. Also serves as a reinforcement.

At the base of the other to-be-butted portion 1Bu, a vertical rib / fitting member 1Bri that connects a part of the lower to-be-fitted portion 1Bib starting at the lower face plate 1bp and the upper face plate 1up.
Is formed, and also serves as a reinforcing material for the lower fitting portion 1Bib and a reinforcing material for the hollow panel structure HPS.

In the hollow panel structure HPS of the present embodiment formed as described above, the friction stir welding portion is limited to the butting portion 2 of one of the front and back face plates 1up and 1up. Halved or 1/3 compared to
In addition, due to the presence of the fitting portion, even if the restraint in the width direction is omitted at the time of the friction stir welding, the joint portion 2 is not opened and a joint defect does not occur. Also, there is no need to manufacture and set a special joint for friction stir welding,
If the outer surface of the lower face plate 1bp without the friction stir welding part is used as the decorative surface of the product, there is no undercut trace of the rotation and movement of the rotary tool for friction stir welding on the decorative surface. There is no necessity, and productivity can be dramatically improved even by using ordinary friction stir welding equipment, and equipment costs, maintenance costs, and manufacturing costs can be significantly reduced.

Another embodiment of the hollow panel structure of the present invention will be described below with reference to the accompanying drawings. FIG.
It is the longitudinal section which looked at the principal part of the hollow panel structure of this embodiment from the longitudinal direction.

The hollow panel structure H according to the present embodiment
PS is, as shown in FIG. 2, a pair of hollow extruded sections 1, 1
And the lower fitting portions 1Aib, 1B formed at the widthwise ends 1A, 1B of the hollow extruded profiles 1, 1, respectively.
ib and the upper fitting part 1
Au, 1Uu and an upper fitting portion 5u fitted with each other. Then, the face plate 1 on one side of the pair of front and back face plates 1up and 1bp of the pair of hollow extruded profiles 1 and 1, respectively.
The abutting part 2 (dashed line in the drawing) where the abutted parts 1Au, 1Bu formed on the up and 1up abut each other is provided with a friction stir welding part 6, and further, one of the abutted parts constituting the abutting part 2 1Au, on the side of the hollow portion directly below the butted surface (in other words, the butted portion 2),
The main part is configured with a vertical rib 1Ar that also supports the tip of Bu.

The above embodiment further has the following specific configuration. That is, the shelf 1ASu protrudes from the upper part of the vertical rib 1Ar in the direction of the base of the butted portion 1Bu so that the upper surface thereof is in contact with the lower surface of the butted portion 1Bu. An upper fitting portion 1Aiu is formed, and the butted portion 1Bu is formed.
Groove-shaped upper fitting portion 1Biu formed on the lower surface of the base portion of
To form the upper fitting portion 5u. Other specific configuration is the same as the form of the previous SL embodiment described with reference to FIG. 1, not described.

The hollow panel structure H according to the present embodiment
The operation and effect of the configuration of the PS are the same as those of the embodiment of the hollow panel structure HPS of the present invention described with reference to FIG. 1 except for the following points. (1) The fitting portion is composed of the lower fitting portion 5b and the upper fitting portion 5u.
This is more than the above-described embodiment in which only the lower fitting portion 5b is provided, and a stronger and more stable joining including the friction stir welding portion 6 can be obtained. (2) Since the vertical rib 1Ar is disposed immediately below the butting portion 2, the butted portion is pressed by an axial (downward) pressing force F that presses the rotating tool 3 against the upper surface of the butting portion 2 during friction stir welding to be described later. The effect of preventing the deformation of 1Au and 1Bu is higher than that of the above-described embodiment of the present invention, so that a joint defect due to the deformation hardly occurs.

Another embodiment of the hollow panel structure of the present invention will be described below with reference to the accompanying drawings. FIG. 3 is a longitudinal sectional view of a main part of the hollow panel structure of the present embodiment as viewed from the longitudinal direction.

The hollow panel structure H in the present embodiment
PS is, as shown in FIG. 3, a pair of hollow extruded profiles 1, 1
And the first lower fitting portion 1Aib formed at the width direction ends 1A, 1B of the hollow extruded profiles 1, 1 respectively.
x, 1Bibx, the first lower fitting part 5bx fitted with each other
A second lower fitting portion 5by in which the second lower fitted portions 1Aiby and 1Bby are fitted to each other; and an upper fitted portion 1A.
iu, 1Biu and an upper fitting portion 5u fitted with each other. Then, one side face plate 1u of the pair of front and back face plates 1up, 1bp of the pair of hollow extruded profiles 1,1, respectively.
A butting portion 2 (dashed line in the drawing) where the butted portions 1Au and 1Bu formed at p and 1up are butted with each other is provided with a friction stir welding portion 6, and further, one of the butted portions constituting the butted portion 2. 1Au, on the side of the hollow portion directly below the butted surface (in other words, the butted portion 2), the other of the butted portions 1B
The main part is provided with a vertical rib 1Ar that also supports the tip of u.

The above embodiment further has the following specific configuration. That is, one butted portion 1Au
Is formed thicker than the face plate 1up, and a notch 1Aun is formed above the top of the top plate so that the top of the other butted portion 1B rests on the top. And this notch 1
A surface perpendicular to the outer surface of the upper face plate 1up of the Aun and the tip end surface of the butt portion 1Bu form a butt portion 2 (dashed line in the figure), and the butt portion 2 is friction stir welded to form a friction stir weld portion 6. Is formed.

Notch 1Au of one butted portion 1Au
The straight under the vertical surface of the n (i.e. butting portion 2), said though vertical ribs 1Ar connecting the target butted portion 1Au and the lower surface plate 1bp is formed, butt the rotating tool 3 during the friction stir welding to be described later part 2 The butted portion 1Au is supported from below so as to prevent the butted portions 1Au and 1Bu from being deformed by an axial (downward) pressing force F pressed against the upper surfaces of the upper face plates 1up and 1up on both sides of the upper panel 1up. Also serves as a reinforcement for the body HPS.

Above the first lower fitting portion 5bx, a vertical rib / fitting member 1B connecting the upper portion of the first fitting portion 1Bibx starting from the lower face plate 1bp and the upper face plate 1up.
and a reinforcing material for the first fitted portion 1Bibx and a reinforcing material for the hollow panel structure HPS.

Above the second lower fitting portion 5by, it extends obliquely upward while curving from the upper end of the second fitted portion 1Aiby starting at the lower face plate 1bp. A rib / fitted member 1Ari that supports 1Aiu is formed, and also serves as a support material for the upper fitted portion 1Aiu and a reinforcing material for the hollow panel structure HPS.

The other upper fitting portion 1Biu is composed of a lower surface of a part 1upz of the upper face plate and a side surface of a projection 1Biz projecting from the inner surface of the upper face plate 1up toward the hollow portion. An upper fitting portion 5u is formed by receiving the upper surface and the distal end surface of the fitting portion 1Aiu on the lower surface of a part 1upz of the upper face plate and the side surface of the projection 1Biuz, respectively.

Between the vertical rib 1Ar and the rib-fitted member 1Ari, it starts on the lower surface of one butted portion 1Bu and extends obliquely downward, and at the lower end, one second lower portion. Rib / fitted member 1 supporting fitted portion 1 Biby
Briy is formed and the second lower fitted portion 1Bib is formed.
It also serves as a support material for y and a reinforcing material for the hollow panel structure HPS.

The other second lower fitted portion 1Ayby is formed as a member which starts on the inner surface of the lower face plate 1bp, rises vertically, and then bends horizontally. The lower surface of the horizontal portion and the upper end of the side surface of the vertical portion The second lower fitting portion 5by is formed by receiving the upper surface and the tip portion of the second lower fitting portion 1Bby at each of the portions (corner portions).

The hollow panel structure H according to the present embodiment
Operation and Effect of PS configuration, except for the following points are the same as the operation and effect of the present implementation described with reference to FIG. That is, the fitting portion first lower fitting portion 5Bx, have become three of the second lower fitting portion 5by the upper fitting portion 5u, before Symbol exemplary fitting portion than the form of the number one more, including a friction stir welding unit 6, before Symbol even stronger than the embodiment of, stable joining is obtained.

[0062] Still another embodiment of the hollow panel structure of the present invention will be described below with reference to the accompanying drawings. FIG. 4 is a longitudinal sectional view of a main part of the hollow panel structure of the present embodiment viewed from the longitudinal direction.

The hollow panel structure H according to the present embodiment
PS is, as shown in FIG. 4, a pair of hollow extruded members 1, 1
And the first lower fitted portions 1Aibx, 1Bi formed at the respective widthwise portions of the respective hollow extruded profiles 1, 1.
bx, the first lower fitting part 5bx fitting the second lower fitting parts 1Aiby, 1Bybi, the second lower fitting part 5by fitting the two lower fitting parts 1Abiby, and the upper fitting parts 1Aiu, 1B.
iu are fitted with each other. Then, the face plates 1up, 1u on one side of the pair of front and back face plates 1up, 1bp of the pair of hollow extruded profiles 1, 1, respectively.
The friction stir welding portion 6 is attached to the upper butting portion 2u (broken line in the drawing) where the butted portions 1Au and 1Bu formed on the p are joined to each other.
Further, a vertical rib 1Ar is provided at an end in the width direction of one of the abutted portions 1Au constituting the upper abutting portion 2u.
In addition, a main part is formed by including a vertical rib / fitted portion 1Briv at the outer end of the vertical rib 1Ar at the widthwise end of the other butted portion 1Bu.

The above embodiment further has the following specific configuration. That is, the lower end of the vertical rib / fitted portion 1Briv is perpendicular to the vertical rib 1Ar.
After forming the horizontal portion is bent in a direction away from the outer surface, the tip of the horizontal portion is bent upward arcuately to form the second lower fitted portion 1Biby in further.

The outer surface of the vertical rib 1Ar and the outer surface of the vertical rib / fitted portion 1Briv are joined to form a butt portion 2. The upper portion 2u (broken line in the figure) of the butt portion 2 is friction stir welded. Thus, the friction stir welding portion 6 is formed. Other specific configuration is similar to the implementation in the form of a hollow panel structure of the present invention described with reference to FIG.

The hollow panel structure H in the present embodiment
Operation and Effect of PS configuration, except for the following points are the same as the implementation in the form Operation and Effect of the hollow panel structure of the present invention described with reference to FIG. That is, in the implementation in the form of a hollow panel structure of the present invention described above, since the vertical ribs 1Ar immediately below the butt portion 2 is arranged, rotary tool 3 of the butt section 2 when the friction stir welding to be described later Butted portions 1Au, 1Bu by axial (downward) pressing force F pressed against the upper surfaces of upper face plates 1up, 1up on both sides.
In the present embodiment, on the other hand, a vertical rib 1Ar and a vertical rib / fitted portion 1Briv are formed on both sides of the butting portion 2, and the two members are At the time of friction stir welding, which will be described later, deformation of the butted portions 1Au and 1Bu due to an axial (downward) pressing force F that presses the rotating tool 3 against the upper surfaces of the upper face plates 1up and 1up on both upper ends of the butting portion 2 is prevented. This suppresses the occurrence of joint defects caused by the above.

Next, an embodiment of the hollow panel structure manufacturing hollow extruded shape member of an embodiment of the present invention and the method for manufacturing the hollow panel structure of the present invention, hereinafter with reference to the accompanying drawings Will be described. 5 (a) is produced in the extrusion step in an embodiment of a method for manufacturing a hollow panel structure of the present invention, an embodiment of a middle empty panel structure for producing cylindrical workpiece from the longitudinal Longitudinal sectional view, FIG. 5 (b),
(C) is a longitudinal sectional view of each of the right end and the left end in the width direction of the hollow extruded profile shown in (a).

[0068] and the procedure of an embodiment of a method for manufacturing a hollow panel structure of the present invention, configuration of an embodiment of a hollow panel structure manufacturing hollow extruded shape member of the present invention is as follows. (1) In the extrusion step, a hollow extruded profile 1 as shown in FIG. 5 is manufactured. That is, the lower fitting portions 1Aib, 1Bib are respectively attached to the widthwise end portions 1A, 1B of the hollow extruded profile 1.
And a pair of front and back face plates 1up, 1b
On the one face plate 1up side of p, a butted portion 1Au having a cutout portion 1Aun having a butted surface 2A and a butted portion 1Bu having a butted surface 2B are formed. The front and back face plates 1 are located at the center in the width direction of the hollow extruded profile 1.
A central vertical rib 1Cr for reinforcement connecting up and 1bp is formed. (2) As shown in FIG. 1, the fitting portions 1Aib and 1Bib of the hollow extruded profiles 1 and 1 shown in FIG. 5 are fitted together to form a lower fitting portion 5b. , Butted surfaces 2A, 2 of the butted portions 1Au, 1Bu
B are butted together to form a butt portion 2, and the butt portions 2 are friction stir welded to form a friction stir weld 6.

One embodiment of the method for manufacturing the hollow panel structure of the present invention configured as described above and one embodiment of the hollow extruded shape for manufacturing the hollow panel structure of the present invention are shown in FIG. Hollow panel structure HP of the present invention described with reference to FIG.
The same operation and effect as in the embodiment of S are achieved.

[0070] Another embodiment of the hollow panel structure manufacturing hollow extruded shape member of the other <br/> exemplary embodiment and the present invention of a method for manufacturing the hollow panel structure of the present invention, reference to the accompanying drawings This will be described below. 6 (a) is a hollow panel structure is the production by extrusion process in another embodiment of the manufacturing method, another embodiment of the hollow panel structure manufacturing hollow extruded shape member of the present invention of the present invention FIG. 6 is a longitudinal sectional view as viewed from the longitudinal direction of FIG.
(B), (c) is a longitudinal cross-sectional view of each of the right end and the left end in the width direction of the hollow extruded profile shown in (a).

[0071] Production side of the hollow panel structure of the of the present invention
The procedure of the embodiment of the method and the configuration of the embodiment of the hollow extruded member for manufacturing the hollow panel structure of the present invention are as follows. (1) In the extrusion step, a hollow extruded profile 1 as shown in FIG. 6 is manufactured. That is, the lower fitting portions 1Aib, 1Bib are respectively attached to the widthwise end portions 1A, 1B of the hollow extruded profile 1.
Are formed, and the shelf 1Asu and the upper fitting portion 1Aiu and the upper fitting portion 1Biu at the tip thereof are formed. Further, butted portions 1Au and 1Bu each having butted surfaces 2A and 2B are formed on one face plate 1up side of the pair of front and back face plates 1up and 1bp. Also, a vertical rib 1Ar is formed immediately below the abutted surface 2A. In the center of the hollow extruded profile 1 in the width direction, a central vertical rib 1Cr for reinforcement connecting the front and back face plates 1up and 1bp is formed. (2) As shown in FIG. 2, the lower fitting portions 1Aib, 1B of the plurality of hollow extruded members 1, 1 shown in FIG.
ib are fitted together to form a lower fitting portion 5b, and the upper fitted portions 1Aiu and 1Biu are fitted together to form an upper fitting portion 5u. Also, the butted portion 1A
The butted surfaces 2A and 2B of u and 1Bu are butted against each other to form a butted portion 2, and the butted portions 2 are friction stir welded to form a friction stir welded portion 6.

[0072] Embodiment of the hollow panel structure manufacturing hollow extruded shape member of the constructed hollow panel structure manufacturing how embodiments and the present invention of the present invention as described, the Figure 2
It refers to the the same operation and effect as <br/> embodiment of the hollow panel structure HP S of the present invention described.

[0073] Production method further hollow panel structure of the present invention
To explain the hollow panel structure manufacturing hollow extruded shape member yet another embodiment of the form and the present invention of another embodiment, in the following with reference to the accompanying drawings. 7 (a) is a hollow panel further method of manufacturing the structure produced in the extrusion process in another embodiment, a hollow panel structure manufacturing hollow extruded shape member further embodiment of the present invention of the present invention FIGS. 7B and 7C are longitudinal sectional views of the right and left ends of the hollow extruded profile shown in FIG. 7A in the width direction, respectively. is there.

Manufacturing method of the hollow panel structure of the present invention described above
The procedure of the embodiment of the method and the configuration of the embodiment of the hollow extruded member for manufacturing the hollow panel structure of the present invention are as follows. (1) In the extrusion step, the hollow extruded profile 1 shown in FIG.
To manufacture. That is, each of the first lower fitting portions 1Aibx and 1Bibx, the second lower fitting portion 1Aiby, and the lower surface of the upper face plate 1up start and extend obliquely downward at each portion in the width direction of the hollow extruded profile 1. Extending rib and mated member 1 Briy
And a second lower fitting portion 1Byby located at the tip thereof. Further, the second lower fitting portion 1Aiby
A rib / support member 1Ari that starts at the upper end of the upper part, extends diagonally upward while curving, and supports a horizontal upper fitted part 1Aiu at the end thereof, from the lower surface of a part 1upz of the upper face plate and the inner surface of the upper face plate 1up. Another upper fitting portion 1Biu formed by the side surface of the projection 1Biz protruding toward the hollow portion is formed. Further pair of front and rear face plates 1up, on one face plate 1up side of the 1 bp, respectively formed to be butted portion 1Bu with the butt surface 2B to be butted portion 1Au a tip having a notch 1Aun with the abutting faces 2A Keep it. Also, a vertical rib 1Ar is formed immediately below the abutted surface 2A. (2) As shown in FIG. 3, the first lower fitting portion 1Aib of the plurality of hollow extruded members 1, 1 shown in FIG.
x, 1Bibx are fitted to each other to form a first lower fitting portion 5bx.
And the second lower fitted portion 1Aib
y, 1 Biby are fitted to each other to form a second lower fitting portion 5 by
To form The upper fitting portions 1Aiu and 1Biu are fitted together to form an upper fitting portion 5u. Further, the butted surfaces 2A and 2B of the butted portions 1Au and 1Bu, respectively.
The butting portions 2 are formed by butting each other.
Are friction stir welded to form a friction stir welded portion 6.

[0075] form of implementation of the hollow panel structure manufacturing hollow extruded shape member of the implementation of the embodiment and the present invention of a method for manufacturing the hollow panel structure of the present invention configured as described above, FIG. 3
Of the hollow panel structure HPS of the present invention described with reference to
The same operation and effect as the form of implementation.

[0076] The method for producing a hollow panel structure of the present invention
A further embodiment of the hollow panel structure manufacturing hollow extruded shape member of al the form and the present invention of another embodiment will be described below with reference to the accompanying drawings. 8 (a) is further prepared in an extrusion process in another embodiment, still another embodiment of the hollow panel structure manufacturing hollow extruded shape member of the present invention of a method for manufacturing the hollow panel structure of the present invention FIGS. 8 (b) and 8 (c) are longitudinal sectional views of the form of FIG.
It is each longitudinal cross-sectional view of the right end part and the left end part of the width direction of the hollow extruded profile shown to (a).

[0077] and instructions in the form of implementation of the method for manufacturing the hollow panel structure of the of the present invention, implementation in the form of a configuration of a hollow panel structure manufacturing hollow extruded shape member of the present invention are as follows . (1) In the extrusion step, the hollow extruded profile 1 shown in FIG.
To manufacture. That is, the width direction end 1A of the hollow extruded profile 1
The vertical rib 1Ar provided with an abutted surface (outer surface) 2A at the end of the upper face plate 1up, and the abutted surface (outer surface) 2B provided at the end of the upper face plate 1up at the width direction end 1B. A vertical rib / fitted portion 1Biv provided with a second lower fitted portion 1Bibvy bent at a right angle is formed in advance.
Other configurations are the same as described in step (1) in the embodiment of the manufacturing how hollow panel structure of the present invention. (2) As shown in FIG. 4, a plurality of hollow extruded members 1, 1 shown in FIG. , The second lower fitting portions 5bx, 5by and the upper fitting portion 5u are formed respectively, and the vertical rib 1Ar and the vertical rib / fitted portion 1Br are formed.
The abutted surfaces (outer surfaces) 2A and 2B of the iv are abutted to form a butted portion 2, and an upper portion 2u of the abutted portion is friction stir welded to form a friction stir welded portion 6.

[0078] implementation in the form of a hollow panel structure manufacturing hollow extruded shape member of the implementation of the embodiment and the present invention of a method for manufacturing the hollow panel structure of the present invention configured as described above, FIG. 4
The same operation and effect as the embodiment of the hollow panel structure HPS of the present invention described with reference to FIG .

[0079] Next, an embodiment of the hollow panel structure manufacturing hollow extruded shape member of the embodiment and the present invention of a method for manufacturing the hollow panel structure of the present invention, the drawings and specific embodiments of the attached This is described below with reference to FIG.

[0080] Figure 9 provides an overview of friction stir welding method according to an embodiment of the method for manufacturing the hollow panel structure of the present invention, one embodiment of the hollow panel structure manufacturing hollow extruded shape member of the present invention It is sectional drawing for demonstrating the definition of various dimensions used for description.

As shown in FIG. 9, the upper and lower face plates 1up, 1up
The minimum thickness portion formed at the end of the upper face plate 1up of the aluminum-based hollow extruded profile (hereinafter simply referred to as hollow extruded profile) 1a having a thickness of bp t ₁ (mm) and a vertical height H (mm) The notch 1aun formed at the upper end of the vertical rib 1ar having a thickness of w ₂ (mm)
The butting portion 2 is formed by placing the end of the upper face plate 1up of b.

The stirring pin of the rotating tool 3 having a diameter D (mm) at the bottom provided with a stirring pin 4 having a diameter d (mm) protruding axially (downward) from the center of the concave or flat circular bottom surface 3b. 4 and the upper face plate 1up of the hollow extruded profile 1a of the butted portion 2, the upper portion of the vertical rib 1ar and the hollow extruded profile 1b.
The rotary tool 3 is pressed into the upper face plate 1up while rotating, and the concave or flat circular bottom surface 3b of the rotary tool 3 is connected to the upper surfaces 1af, 1 of the upper face plates 1up, 1up on both sides of the butting portion 2.
While pressing the bf in the axial direction (downward) with the pressing force F (kgf), the rotary tool 3 is rotated and moved along the butt line (longitudinal direction of the hollow extruded profiles 1a, 1b) while rotating. The part 2 is friction stir welded. In addition, w ₁ (mm) indicates the shortest distance between the outer surface of the stirring pin 4 and the inner peripheral surfaces 1as, 1as of the vertical ribs 1ar of the hollow extruded profile 1a.

[0083] Figure 10 provides an overview of friction stir welding method according to another embodiment of the method for manufacturing the hollow panel structure of the present invention, another embodiment of the hollow panel structure manufacturing hollow extruded shape member of the present invention FIG. 3 is a cross-sectional view for explaining definitions of various dimensions used in the description of the embodiment.

As shown in FIG. 10, the upper and lower face plates have a thickness of t ₁ (mm), and a hollow extruded profile vertical height H (mm) is an aluminum-based hollow extruded profile (hereinafter simply referred to as a hollow extruded profile). The minimum thickness of each of 1c and 1d is w ₂ (m
m) The outer surface of each vertical rib / fitted member 1cri and the outer surface of the vertical rib 1dr are butted and brought into contact with each other to form a butted portion 2.

The stirring pin of the rotating tool 3 having a diameter D (mm) at the bottom provided with a stirring pin 4 having a diameter d (mm) protruding axially (downward) from the center of the concave or flat circular bottom surface 3b. 4 is pushed into the upper portions of the hollow extruded profiles 1c and 1d of the butting portion 2 while being rotated, and the concave surface of the rotary tool 3 or the flat circular bottom surface 3b is formed on the upper face plates 1up and 1up on both sides of the butting portion 2. Hollow extruded profiles 1c, 1 on top
d while pressing the upper surface 1cf, 1df in the axial direction (downward) with the pressing force F (kgf), while rotating the rotary tool 3, the longitudinal direction of the hollow extruded profiles 1c, 1d (perpendicular to the plane of the drawing). The upper portions of the hollow extruded sections 1c and 1d of the butted portion 2 are friction stir welded.

Note that w ₁ (mm) is the outer surface of the stirring pin 4 and the vertical rib / fitted member 1cri of the hollow extruded profile 1c.
The shortest distance between the vertical rib 1dr of the hollow extruded profile 1d and each of the rib inner peripheral surfaces 1cs and 1ds is shown. If the vertical rib / fitted member 1cri of the hollow extruded profile 1c and the vertical rib 1dr of the hollow extruded profile 1d have different minimum thicknesses in the vertical portion, the smaller thickness is defined as w ₂ ( m
shall be used as m).

[0087] First, the embodiment of a method of manufacturing a hollow panel structure of the present invention, the embodiment of the middle empty panel structure for producing cylindrical workpiece, with reference to the accompanying drawings and specific embodiments of the attached It will be described below.

1. Example 1 FIG. 11 shows a pair of aluminum-based hollow extruded members 1a for manufacturing a pair of hollow panel structures used for friction stir welding of this example.
It is a longitudinal cross-sectional view which shows the positional relationship between the shape and dimension of 1b, and the stirring pin 4 for friction stir welding. In FIG. 11, a rotating tool 3 having a diameter d = 15 mm and a bottom D provided with a stirring pin 4 having a diameter d = 4 mm and a lower end having a radius of curvature r = 4 mm is chamfered. 1
The depth h (hereinafter, referred to as a planned junction depth) from the upper surface 1af, 1bf of the up to the lower end of the outer peripheral surface of the stirring pin 4 is 3.0 m.
m, 4.0 mm and 5.0 mm, the shortest distance w ₁ between the outer surface of the stirring pin 4 and the inner rib surfaces 1as, 1as when the radius of curvature R of the inner rib surface is 8 mm.
(Mm) is shown on the right side of the vertical rib 1ar in the figure.
Further, the rib inner circumferential surface 1a before Symbol expected junction depth h is at 4.0mm
The outer surface of the stirring pin 4 and the inner peripheral surface 1a of the rib in the cases where the radii of curvature R and S are 1 = 8 mm and R = 6 mm, respectively.
The shortest distance w ₁ (mm) from s, 1as to the vertical rib 1 in the figure.
It is shown to the left of ar. The material used was “JI
SH 4100 "is an aluminum alloy hollow extruded shape 6063-T5 material.

As shown in FIG. 11, when the radius of curvature R of the inner peripheral surface of the rib is 8 mm, the planned joining depth h (mm) is changed by changing the height of the stirrer pin 4 and the stirrer pin is changed. 4 and the inner peripheral surface 1as of the vertical rib 1ar.
The effect of the shortest distance w ₁ (mm) between the friction stir welding and the quality on friction stir welding was investigated. Also, the planned joining depth h (mm)
Is fixed, the curvature radius R of the rib inner peripheral surfaces 1as, 1as is changed, and the outer surface of the stirring pin 4 and the rib inner peripheral surfaces 1as, 1a are changed.
The effect of the shortest distance w ₁ (mm) between the friction stir welded portion and the quality of the friction stir welded portion was investigated. Table 1 below shows the above survey results.
It was shown to.

[0090]

[Table 1]

As shown in Table 1, w ₁ is 0.5 mm
In the following cases, a large hollow defect occurred at the bottom of the joint, and when w ₁ was 0.6 mm, a small point defect that could not be visually identified was generated. w ₁ it was totally obtained healthy joints without defects in 1.2mm or more.

[0092] 2. Example 2 FIG. 12 shows the vertical cross-sectional shapes and dimensions of a pair of aluminum-based hollow extruded shapes 1a and 1b for manufacturing a hollow panel structure used in this example. The shapes and dimensions of the rotary tool 3 and the stirring pin 4 are the same as those used in the first embodiment. The used material is an aluminum alloy hollow extruded shape 6N01-T5 material shown in “JISH 4100”. Then, by changing the depth h (mm) of the stirring pin 4 pushed into the upper part of the butted portion of the hollow extruded profile, the shortest distance w ₁ (the outermost surface of the stirring pin 4 and the rib inner peripheral surfaces 1as, 1as (w ₁ ( mm) on the quality of friction stir welds. The survey results are shown in Table 2 below.

[0093]

[Table 2]

As shown in Table 2, when w ₁ is 0.4 mm or less, a large hollow defect occurs at the bottom of the joint, similarly to the case where w _{1 in} Example ₁ is 0.5 mm or less. _{When 1} was 0.8 mm, small point-like defects that could not be visually discriminated occurred. w ₁ is healthy joints without defects was obtained by 1.2mm or more.

3. Example 3 FIG. 13 shows a pair of aluminum-based hollow extruded shapes 1c for manufacturing a pair of hollow panel structures used for friction stir welding of this example.
It is a longitudinal cross-sectional view which shows the positional relationship between the shape and dimension of 1d, and the stirring pin 4 for friction stir welding. In FIG. 13, a rotating tool 3 having a diameter D = 15 mm and a bottom D provided with a stirring pin 4 having a diameter d = 4 mm and a lower end chamfered with a radius of curvature r = 4 mm is used. 1
The depth h (hereinafter, referred to as a predetermined junction depth) from the upper surface 1cf, 1df of the up to the lower end of the outer peripheral surface of the stirring pin 4 is 3.0 m.
m, 4.0 mm, and 5.0 mm, the shortest distance w ₁ (m) between the outer surface of the stirring pin 4 and the inner rib surface 1ds when the radius of curvature R of the inner rib surface 1ds is R = 8 mm.
m) is shown on the right side of the butting portion 2 in the figure. Further, in the case of each of the curvature radius R = 8 mm and R = 6 mm before Symbol planned junction depth h rib inner peripheral surface 1cs at 4.0 mm,
The shortest distance w ₁ between the outer surface of the stirring pin 4 and the inner circumferential surface 1cs of the rib.
(Mm) is shown on the left side of the butting portion 2 in the figure. In addition,
The material used is an aluminum alloy hollow extruded shape 6063-T5 material shown in "JIS H 4100".

As shown in FIG. 13, when the radius of curvature R of the inner circumferential surface of the rib is R = 8 mm, the planned joining depth h (mm) is changed by changing the height of the stirring pin 4 and the stirring pin is changed. The influence of the shortest distance w ₁ (mm) between the outer surface of No. 4 and the rib inner peripheral surfaces 1 cs and 1 ds on the quality of the friction stir welded portion was investigated. Also, fixing the planned joining depth h (mm),
The radius of curvature R of the rib inner peripheral surface is changed, and the shortest distance w ₁ (m) between the outer surface of the stirring pin 4 and the rib inner peripheral surfaces 1cs and 1ds is changed.
The effect of m) on the quality of friction stir welds was investigated.
The results of the above investigation are shown in Table 3 below.

[0097]

[Table 3]

As shown in Table 3, w ₁ is 0.5 mm
In the following cases, a large hollow defect occurred at the bottom of the joint, and when w ₁ was 0.6 mm, a small point defect that could not be visually identified was generated. w ₁ it was totally obtained healthy joints without defects in 1.2mm or more.

4. Example 4 A pair of aluminum-based hollow extruded members 1 used in this example
FIG. 14 shows the shapes and dimensions of c and 1d. The shapes and dimensions of the rotary tool 3 and the stirring pin 4 are the same as those used in the third embodiment. The material used is "JIS H 4100"
Aluminum hollow extrusion 6N01-T
5 materials. Then, by changing the depth h (mm) of the stirring pin 4 pushed into the upper part of the butted portion of the hollow extruded profile,
The shortest distance w between the outer surface of the stirring pin 4 and the inner peripheral surface of the rib
_The effect of ₁ (mm) on the quality of the friction stir weld was investigated. The results of the investigation are shown in Table 4 below.

[0100]

[Table 4]

As shown in Table 4, when w ₁ is 0.4 mm or less, a large hollow defect is generated at the bottom of the joint, similarly to the case where w _{1 in} Example 3 is 0.5 mm or less. _{When 1} was 0.8 mm, small point-like defects that could not be visually discriminated occurred. w ₁ is healthy joints without defects was obtained by 1.2mm or more.

The results of Table 1 of Example 1, Table 2 of Example 2, Table 3 of Example 3, and Table 4 of Example 4 are all combined. the shortest distance w ₁ between the peripheral surface of at least 0.6mm or more, preferably required to be more than 1.2 mm.

Also, at a predetermined joining depth h (mm) at the upper portion of the hollow extruded section at the butt section, the outer surface of the stirring pin pushed into the upper section of the hollow extruded section at the butt section is perpendicular to the outer surface of the hollow extruded section. the shortest distance w ₁ between the ribs in the peripheral surface 0.6m
If the aluminum-based hollow extruded material for manufacturing a hollow panel structure is formed in advance so as to maintain the diameter at or above m, only a point-like joint defect that cannot be visually observed at the time of friction stir welding occurs as described above. If the use of the aluminum-based hollow panel structure is not required to have very severe mechanical strength or the like, it can sufficiently withstand use.

Further, the outer surface of the stirring pin pushed into the upper part of the hollow extruded profile of the butt portion at the predetermined joining depth h (mm) at the upper portion of the hollow extruded profile of the butt portion and the hollow extruded profile member Shortest distance w between the inner peripheral surface of the vertical ribs
_{If the} aluminum-based hollow extruded shape for manufacturing a hollow panel structure is formed in advance so that ₁ is kept at 1.2 mm or more, no joint defect occurs at the time of friction stir welding as described above, Even if the use of the aluminum-based hollow panel structure is a use requiring strict mechanical strength or the like, it can sufficiently withstand use.

The following is a description of the cause of the hollow defect generated at the bottom of the friction stir welded portion, including observation during an experiment, as described below.

(1) When the shortest distance w ₁ between the outer surface of the stirring pin 4 and the inner peripheral surface of the vertical rib is 0.5 mm or less, FIG.
As shown in FIGS. 5 (a) and 16 (a), the thin ribs between the outer surface of the stirring pin 4 and the inner peripheral surface of the vertical ribs of the hollow extruded section are spread outward. When the amount of deformation is large and the amount of deformation is large, the increase in the inner volume at the bottom of the joint at the upper surface of the upper face plates 1up and 1up on both lower sides of the stirring pin 4 becomes large enough to be seen. Therefore, FIG.
As shown in (a) and FIG. 16 (a), the replenishment of metal by plastic flow to the bottom of the joint is insufficient,
Since the shortage is large, a hollow defect dfb large enough to be visually discerned is generated at the bottom of the joint.

(2) When the shortest distance w ₁ between the outer surface of the stirring pin 4 and the inner peripheral surface of the vertical rib is not less than 0.6 mm and less than 1.2 mm, FIGS. 15 (b) and 16 (b) As shown in the figure on the left, the thin rib between the outer surface of the stirring pin 4 and the inner peripheral surface of the rib as described above may be deformed so as to slightly spread outward, but the amount of deformation is small, and The expansion of the inner volume at the bottom of the joint on the upper surface of the upper face plates 1up, 1up on the lower sides of the stirring pin 4 is not so large as to be visible. Therefore, as shown in the right diagrams of FIGS. 15B and 16B, even if the metal is insufficiently replenished to the bottom of the joint by plastic flow, the shortage is not so large. As a result, a point-like defect dfs is generated at the bottom of the joint so as not to be visually discriminated.

(3) When the shortest distance w ₁ between the outer surface of the stirring pin 4 and the inner peripheral surface of the vertical rib is sufficiently thick as 1.2 mm or more, the left side of FIGS. 15C and 16C is left. As shown in the figure, as described in the above (1) and (2), the inner peripheral surface side of the vertical rib is never deformed so as to spread outward, and thus the replenishment of metal by plastic flow is insufficient. 15 (c) and FIG. 16 (c), there is no occurrence of a hollow or point-like defect at the bottom of the joint as described above.

5. Fifth Embodiment Next, in the first and second embodiments, and in the third and fourth embodiments, a condition in which a joint defect (point defect) that cannot be visually discriminated was generated, that is, when the shortest distance w ₁ between the vertical ribs in the peripheral surface of the outer surface of the stirring pin and the hollow extruded shape member is less than 1.2mm or 0.6 mm, the inside vertical rib peripheral surface, (1) no cooling (natural Cooling), (2) blast cooling, (3) cooling water spray cooling
Friction stir welding was performed while cooling at a stage cooling level, and the effect of the cooling level on the quality of the friction stir weld was investigated. The examination results are shown in Tables 5 and 6 below.

[0110]

[Table 5]

[0111]

[Table 6]

As shown in Tables 5 and 6, the shortest distance w ₁ between the outer surface of the stirring pin and the inner peripheral surface of the rib is 0.6 mm.
When it is less than 1.2 mm, (1) without cooling (natural cooling), as shown in Tables 1 to 4, the occurrence of joint defects (point-like defects) to the extent that they cannot be visually discriminated. However, in the case of (2) blast cooling and (3) cooling water spray cooling, there was no occurrence of joint defects (point-like defects) that could not be visually discriminated, and good friction stir welding quality. Could be obtained. Therefore, when the shortest distance w ₁ between the outer surface and the ribs in the peripheral surface of the stirring pin is less than 1.2mm or 0.6mm it is actively ribs inner peripheral surface by the air supply cooling method or cooling water spray cooling method It is preferable to perform effective cooling in order to prevent occurrence of joint defects and to improve joint quality.

[0113] Next, the other embodiment of the manufacturing method of a hollow panel structure of the present invention, another embodiment of the middle empty panel structure manufacturing hollow extruded shape member, and concrete accompanying drawings This will be described below with reference to examples.

6. Example 6 A pair of hollow extruded profiles 1 of aluminum alloy hollow extruded profiles 6N01-T5 and 6N01-T1 specified in "JIS H 4100" having shapes and dimensions as shown in FIG.
a, 1b are made of a hollow extruded material 1a
Notch 1au above the vertical rib 1ar at the end in the width direction
n and the end in the width direction of the upper face plate 1up of the hollow extruded profile 1b were butted and contacted, and friction stir welding was performed in the longitudinal direction (the direction perpendicular to the paper of FIG. 17). At this time, the joint depth (the depth from the upper surface of the hollow extruded profile to the lower end of the outer periphery of the stirring pin) h = 2 mm, the shortest distance w ₁ = 5 mm between the outer surface of the stirring pin and the inner peripheral surface of the vertical rib, and rotation Tool bottom diameter D =
10mm, axial pressing force of rotary tool F = 250kgf
Under certain conditions, the height H of the hollow extruded profile is 50 to 50
In the case where the number n of the vertical ribs at the butting portion is n = 1 by changing the distance stepwise between 400 mm.
By changing the buckling limit thickness w _2A (mm) and the deformation / buckling limit thickness w _2B (mm) of the formula 2, the deformation / buckling limit thickness w _2A , w _2B and the minimum thickness portion of the vertical rib 1ar. Thickness w
_The effect of the magnitude relationship with ₂ on the joint quality was investigated.
The results of the investigation are shown in Table 7 below.

[0115]

[Table 7]

The following can be said from Table 7 above. (1) 6N01-T5 material (proof stress σ _0.2 = 225 N / m
m ² ), the thickness w ₂ of the minimum thickness portion of the vertical rib is 2.0 m
In the case of m, no defect occurred at the joint. At this time,
If the height H of the cylindrical workpiece is either 50~400mm also, w _2> w _2B and was w _2> w _2A. (2) wherein (1) the same material as the term, if the thickness w ₂ of the minimum thickness of the vertical ribs of 1.5 mm, w ₂ in all cases>
The condition _w2B was satisfied. Then, when the height H of the hollow extruded profile was up to 100 mm, that is, when w ₂ > w _2A, no joint defect occurred. Hollow extruded profile height H =
In the case of 200 mm, that is, when w ₂ ≒ w _2A , a defect was generated to the extent that it could not be visually identified. Hollow extruded profile height H =
At 300 mm (w ₂ <w _2A ), heavy defects occurred, and joining was impossible at the height H of the hollow extruded profile of 400 mm (w ₂ << w _2A ). (3) 6N01-T1 material (proof stress σ _0.2 = 90 N / mm ² )
In the case the thickness w ₂ of the minimum thickness of the vertical ribs of 2.0 mm, the height H of the cylindrical workpiece even when the 100mm below the joint defects occur. At this time, w ₂ > w _2A , but w ₂ <w _2B . (4) When the thickness w ₂ of the minimum thickness portion of the vertical rib is increased to 3.0 mm with the same material as in (3), w ₂ > w _2B and w ₂ > w _2A , and there is no defect and soundness. A good joint was obtained.

7. Example 7 A pair of hollow extruded members 1 made of the same two materials as in Example 6 and having the same shape and dimensions as in Example 6 as shown in FIG.
a, 1b are made of a hollow extruded material 1a
Notch 1au above the vertical rib 1ar at the end in the width direction
n and the end in the width direction of the upper face plate 1up of the hollow extruded profile 1b were butted, and friction stir welding was performed in the longitudinal direction (the direction perpendicular to the paper surface of FIG. 17). At this time, the joining depth h = 4 mm,
Shortest distance w ₁ = 5 between the outer surface of the stirring pin and the inner peripheral surface of the rib
mm, the vertical height H of the hollow extruded profile is changed stepwise between 50 to 400 mm under a constant condition of a rotating tool bottom D = 15 mm and a pressing force F of the rotating tool = 400 kgf, changing the number n = 1 of the deformation and buckling limit thickness w _2B the deformation and buckling limit thickness w _2A of the formula 1 formula 2 in the case of the vertical ribs in butted portion, these deformation and buckling limit thickness w _2A, the magnitude relationship between the thickness w ₂ of the minimum thickness portion of the w _2B and vertical ribs 1ar was investigated the effect on the joint quality. The results of the investigation are shown in Table 8 below.

[0118]

[Table 8]

The following can be said from Table 8 above. (1) 6N01-T5 material (proof stress σ _0.2 = 225 N / m
m ² ), the thickness w ₂ of the minimum thickness portion of the vertical rib is 2.0 m
In the case of m, when the height H of the hollow extruded profile was 50 to 300 mm, there was no defect in the joint. At this time, in any case where the height H of the hollow extruded profile is 50 to 300 mm,
w ₂ > w _2A and w ₂ > w _2B . However, the height H of the hollow extruded profile is 400 mm (w ₂ ≒ w _2A , and w ₂ >
In the case of w _2B ), a defect that could not be visually discriminated occurred at the joint. (2) the the same material (1), if the thickness w ₂ of the minimum thickness of the vertical ribs of 1.5 mm, in the case of all w _2> w
The condition of _2B was satisfied. And, when the height H of the hollow extruded profile was up to 100 mm, that is, when w ₂ > w _2A, no joint defect occurred. Hollow extruded profile height H
= 200 to 300 mm, i.e., in the case of w ₂ <w _2A junction defect occurs. Hollow extruded profile height H = 400
mm (w ₂ << w _2A ), joining was impossible. (3) 6N01-T1 material (proof stress σ _0.2 = 90 N / mm ² )
In the case where the thickness w ₂ of the minimum thickness portion of the vertical rib is 2.0 mm, even when the height H of the hollow extruded profile is 50 mm,
A joint defect occurred. At this time, w ₂ > w _2A , but w ₂ <w _2B . (4) When the thickness of the minimum thickness portion of the vertical rib is increased to w ₂ = 3.0 mm with the same material as in (3) above, w ₂ > w _2A ,
In addition, w ₂ ≒ w _2B , and a joint defect that cannot be visually identified is generated. (5) When the thickness of the minimum thickness portion of the rib is increased to w ₂ = 4.0 mm with the same material as in the above (3), w ₂ > w _2A and w ₂ > w _2B , resulting in a sound without defects. A good joint was obtained.

8. Example 8 A pair of hollow extruded profiles 1 of aluminum alloy hollow extruded profiles 6N01-T5 and 6N01-T1 specified in "JIS H 4100" having shapes and dimensions as shown in FIG.
c and 1d are each made of a hollow extruded material 1c.
The outer surface of the vertical rib / fitted member 1cri at the width direction end and the outer surface of the vertical rib 1dr of the hollow extruded profile 1d are butted.
The upper portion 2u of the butting portion 2 was subjected to friction stir welding in the longitudinal direction (the direction perpendicular to the paper surface of FIG. 18) from the upper surface side of the upper face plates 1up and 1up. At this time, the joining depth h = 2 mm, and the shortest distance w ₁ = 5 m between the outer surface of the stirring pin and the inner peripheral surface of the vertical rib.
m, the diameter H of the bottom of the rotary tool = 10 mm, the pressing force F in the axial direction of the rotary tool F = 250 kgf, and the height H of the hollow extruded section is changed stepwise between 50 to 400 mm. , by changing the number n = deformation and buckling limit thickness w _2A of the formula 1 in the case of 2 (mm) and the deformation and buckling limit thickness w _2B of formula 2 of vertical ribs (mm) in the butt section, these deformation and buckling limit thickness w _2A, the magnitude relationship between the thickness w ₂ of the minimum thickness portion of the w _2B and vertical ribs and the fitted portion 1cri and vertical ribs 1dr was investigated the effect on the joint quality. The results of the investigation are shown in Table 9 below.

[0121]

[Table 9]

The following can be said from Table 9 above. (1) 6N01-T5 material (proof stress σ _0.2 = 225 N / m
m ² ), the thickness w ₂ of the minimum thickness portion of the vertical rib is 1.0 m
In the case of m, no defect occurred at the joint. At this time,
If the height H of the cylindrical workpiece is either 50~400mm also, w _2> w _2B and was w _2> w _2A. (2) wherein (1) the same material as the term, if the thickness w ₂ of the minimum thickness of the vertical ribs of 0.75 mm, w ₂ in all cases
> _W2B . Then, when the height H of the hollow extruded profile was up to 100 mm, that is, when w ₂ > w _2A, no joint defect occurred. Hollow extruded profile height H
= 200 mm, that is, when w ₂ ≒ w _2A , a defect was generated that could not be visually discriminated. Hollow extruded profile height H
= 300 mm (w ₂ <w _2A ), a heavy defect occurred, and joining was impossible at a height H of the hollow extruded profile of 400 mm (w ₂ << w _2A ). (3) 6N01-T1 material (proof stress σ _0.2 = 90 N / m
m ² ), the thickness w ₂ of the minimum thickness portion of the vertical rib is 1.0 m
In the case of m, a joint defect occurred even when the height H of the hollow extruded profile was 100 mm or less. At this time, w ₂ > w
_2A , but w ₂ <w _2B . (4) With the same material as in (3) above, when the thickness of the minimum thickness portion of the vertical rib is increased to w ₂ = 1.5 mm, w ₂ > w _2B and w ₂ > w _2A , and there is no defect sound. A good joint was obtained.

9. Example 9 A pair of hollow extruded shapes 1 made of the same two materials as in Example 8 and having the same shape and dimensions as in Example 6 as shown in FIG.
c and 1d are friction stir welded in the longitudinal direction (the direction perpendicular to the paper surface of FIG. 18) by abutting the outer surfaces of the vertical ribs and the fitted member 1cri and the outer surfaces of the vertical ribs 1dr with each other using the respective materials. Was. At this time, the joining depth h = 4 mm, and the shortest distance w ₁ = 5 m between the outer surface of the stirring pin and the inner peripheral surface of the rib.
m, the diameter H of the bottom of the rotating tool = 15 mm, and the pressing force F in the axial direction of the rotating tool F = 400 kgf. , by changing the number n = 2 of deformation and buckling limit thickness w _2B the deformation and buckling limit thickness w _2A of the formula 1 formula 2 in the case of the vertical ribs in butted portion, these deformation and buckling limit thickness The influence of the magnitude relationship between w _2A and w _2B and the thickness w ₂ of the minimum thickness portion of the vertical rib / fitted member 1cri and the vertical rib 1dr on the quality of the joint was investigated. The results of the investigation are shown in Table 10 below.

[0124]

[Table 10]

The following can be said from Table 10 above. (1) 6N01-T5 material (proof stress σ _0.2 = 225 N / m
m ² ), the thickness w ₂ of the minimum thickness portion of the vertical rib is 1.0 m
In the case of m, when the height H of the hollow extruded profile was 50 to 300 mm, no joint defect occurred. At this time, in any case where the height H of the hollow extruded profile is 50 to 300 mm,
w ₂ > w _2A and w ₂ > w _2B . However, the height H of the hollow extruded profile is 400 mm (w ₂ ≒ w _2A , and w ₂ >
In the case of w _2B ), a defect that could not be visually discriminated occurred at the joint. (2) In the case where the thickness w ₂ of the minimum thickness portion of the vertical rib is 0.75 mm using the same material as in the above (1), w ₂ >
The condition _w2B was satisfied. And, when the height H of the hollow extruded profile was up to 100 mm, that is, when w ₂ > w _2A, no joint defect occurred. When the height H of the hollow extruded profile was 200 to 300 mm, that is, when w ₂ <w _2A , a joint defect occurred. Hollow extruded profile height H = 40
At 0 mm (w ₂ << w _2A ), joining was impossible. (3) 6N01-T1 material (proof stress σ _0.2 = 90 N / mm ² )
In the thickness w ₂ of the minimum thickness of the vertical ribs in the case of 1.0 mm, the height H of the cylindrical workpiece even when the 50 mm,
A joint defect occurred. At this time, w ₂ > w _2A , but w ₂ <w _2B . (4) When the thickness of the minimum thickness portion of the vertical rib is increased to w ₂ = 1.5 mm with the same material as in (3) above, w ₂ > w _2A ,
In addition, w ₂ ≒ w _2B , and a joint defect that cannot be visually identified is generated. (5) When the thickness of the minimum thickness portion of the vertical rib is increased to w ₂ = 2.0 mm with the same material as in (3) above, w ₂ > w _2A ,
In addition, w ₂ > w _2B , and a sound joint without defects was obtained.

The findings from Table 7 of Example 6, Table 8 of Example 7, Table 9 of Example 8, and Table 10 of Example 9 are summarized as follows. (1) The thickness w ₂ (mm) of the minimum thickness portion of the vertical rib at the abutting portion of the aluminum-based hollow extruded profile is equal to or more than the first deformation / buckling limit thickness w _2A (mm) defined by the above equation (1). In the case of the above, if the thickness is smaller than the second deformation / buckling limit thickness w _2B (mm) defined by the above equation 2, a large joint defect that can be visually recognized is generated or the joint becomes impossible. _Two
When (mm) is equal to w _2B (mm), a defect that cannot be visually identified is generated. From this, assuming that the occurrence of a defect that cannot be visually discriminated is allowed, and to prevent the occurrence of a joint defect that can be visually discriminated, w ₂ ≧ w _2A and w ₂ ≧ w _2B There is a need to. (2) Even when the condition of w ₂ ≧ w _2B is satisfied as described above, w ₂ is equal to the first buckling limit thickness w defined by the above equation (1).
If lower than _2A generates large joints possible defects determination visually, w ₂ is the degree of defects occur it could not be determined visually, if equal to the w _2A. From this, assuming that the occurrence of defects that cannot be visually discriminated is allowed, and to prevent the occurrence of joint defects that can be visually discriminated, w ₂ ≧ w _2A and w ₂ ≧ w Must be _2B . (3) In order to prevent occurrence of a joint defect that cannot be visually identified, it is necessary to _satisfy w ₂ > w _2A and w ₂ > w _2B .

Accordingly, the shortest distance w ₁ between the outer surface of the stirring pin and the inner circumferential surface of the rib is maintained at 0.6 mm or more, assuming that the occurrence of a defect that cannot be visually recognized in the friction stir welding portion is allowed. In addition, the aluminum hollow extruded section for friction stir welding is formed in advance so that the thickness w ₂ (mm) of the minimum thickness portion of the rib forming the butting portion satisfies the following formulas 1 and 2. , The junction depth h
(Mm), the axial pressing force F (kgf) of the rotating tool and / or the diameter D (mm) of the bottom of the rotating tool are preferably selected to perform friction stir welding. w ₂ ≧ w _2A = {(F × H) / (1439 × D)} ^1/3 / n Equation 1 w ₂ ≧ w _2B = F / (n × D × σ _0.2 ) —Equation 2 , W _2A : first deformation / buckling limit thickness (mm) w _2B : second deformation / buckling limit thickness (mm) F: axial pressing force (kgf) of rotating tool D: diameter of rotating tool bottom (Mm) σ _0.2 : Strength of aluminum-based hollow extruded profile (kgf /
mm ² ) H: height of the hollow extruded profile, that is, the distance between the outer surfaces of the upper and lower plates (mm) n: number of vertical ribs at the butted portion (1 or 2)

Further, when the friction stir welding section is used for severe applications in which generation of a defect that cannot be visually discriminated is unacceptable, the shortest distance w ₁ between the outer surface of the stirring pin and the inner peripheral surface of the rib is set to 1 The aluminum hollow extruded material for friction stir welding such that the thickness w ₂ (mm) of the minimum thickness portion of the vertical rib at the abutting portion satisfies the following formulas 1 ′ and 2 ′ while maintaining the thickness at ₂ mm or more. Is formed in advance, or the joining depth h (mm), the axial pressing force F (kgf) of the rotating tool, and / or the diameter D (m
It is preferable to select m) and perform friction stir welding. w ₂ > w _2A = {(F × H) / (1439 × D)} ^1/3 / n ^—Formula 1 ′ w ₂ > w _2B = F / (nxD × σ _0.2 ) —Formula 2 ′

[0129] Incidentally, the joint defect thickness w ₂ of the minimum thickness of the ribs forming the object abutting faces occurs is not satisfied condition as described above is believed to occur as follows.

(1) The thickness w of the minimum thickness portion of the vertical rib
₂₀ is the deformation / buckling limit thickness at which the vertical rib 1ar does not cause deformation / buckling as shown in FIG. 19 with respect to the axial pressing force F (kgf) of the rotating tool 3 or FIG. Opposed vertical ribs 1cri and 1dr as shown
Is less than one of w _2A given by the above formula 1 and w _2B given by the above formula 2 as a deformation / buckling limit thickness not causing deformation / buckling to bend to the inner surface side of each vertical rib. In the case where the hollow extruded member 1 shown in FIG.
Notch 1a formed at the upper end of vertical rib 1ar
20 and deformation or buckling such that a gap 2gu is generated between the upper end plate 1up of the other hollow extruded profile 1b and the end of the butted portion, or as shown in FIG. A gap 2g between the vertical rib / fitted portion 1cri and the vertical rib 1dr where the outer surfaces of the members 1c and 1d are in contact with each other.
Deformation occurs and buckling occurs such that the gap 2g thus formed extends to the upper joint portion of the hollow extruded profiles 1a and 1b to be joined, and if a hollow defect continuous in the joining direction is generated, or if it is severe, the joining is performed. It becomes impossible.

(2) The thickness w of the minimum thickness portion of the vertical rib
_2, the sufficiently larger than one value of w _2A and w _2B, when approximately equal to the other one of the values, the degree of deformation and buckling of the vertical rib does not become so large, that If the resulting gap 2gu or gap 2g is relatively small and the effect of this gap 2g on the upper joint portion of the workpieces 1c and 1d to be joined is not so large, a defect that cannot be visually identified can occur. It is thought that it is enough.

(3) The thickness w of the minimum thickness portion of the vertical rib
_{When 2} is larger than both w _2A and w _2B , the deformation / buckling does not occur or is negligibly small even if it occurs. As a result, the gap 2gu or the gap 2
It is considered that a sound joint is obtained in which g is not generated or is small enough to have no effect even if g is generated and a defect that cannot be visually recognized is not generated.

10. Example 10 A hollow panel structure having a fitting portion and a friction stir welding portion as shown in FIG. 3 using an aluminum-based hollow extruded shape having a cross-sectional shape and dimensions of 2 m as shown in FIG. Was manufactured. At this time, while keeping the shortest distance w ₁ between the outer surface of the stirring pin and the inner peripheral surface of the rib at 1.2 mm or more, the thickness w ₂ (m
The friction stir welding condition was selected so that m) satisfies the above formula 1 ′ and the following formula 2 ′ when the number n of the vertical ribs at the butted portion is n = 1. The material used was "JIS H410
6N01-T5 material specified in “0”.

As a comparative example, using the same material as in the above example, (1) an aluminum-based hollow extruded material having a sectional shape and dimensions of 2 m as shown in FIG. -309164, and joined by friction stir welding on the front and back sides as described with reference to FIG.
When the hollow panel structure is manufactured, (2) FIG.
In the case where a hollow panel structure is manufactured by connecting aluminum-based hollow extruded members having a cross-sectional shape and dimensions of 2 m and having a length of 2 m by fitting only as shown in FIG. Table 11 shows the results of comparing the water tightness, friction noise, strength, and manufacturing cost of the hollow panel structure.

[0135]

[Table 11]

As shown in Table 11, the aluminum-based hollow panel structure of the present invention is slightly inferior in strength to (a) the structure of the comparative example (1) using double-sided friction stir welding. , In terms of manufacturing cost, and otherwise equivalent. (B) Compared to the structure of the comparative example (2) with only fitting, the manufacturing cost is slightly inferior, but is much better in other respects.

Next, still another embodiment of the method for manufacturing a hollow panel structure according to the present invention will be described below with reference to the accompanying drawings and specific examples.

11. Example 11 Three aluminum hollow extruded members for manufacturing a hollow panel structure having a cross-sectional shape and a size of 2 m as shown in FIG. 21A were fitted and friction-stirred by the following method. By joining, a hollow panel structure was manufactured. (1) As Example 1, friction stir welding is performed on two butted portions from above using friction stir welding equipment capable of simultaneously welding two locations (in the embodiment of the method for manufacturing a hollow panel structure of the present invention ). Equivalent). (2) As Comparative Example 1, friction stir welding is performed from above on two butted portions divided into two portions, one portion at a time. In any of the above cases, restraint in the width direction during friction stir welding was not performed.

As Comparative Example 2, an aluminum-based hollow extruded material having a cross-sectional shape and dimensions as shown in FIG. As disclosed in Japanese Patent No. 309164 and described with reference to FIG. 23, a method of sequentially performing friction stir welding at two places from the upper surface side and then sequentially performing friction stir welding at two places on the back side that are reversed and left. Then, three sheets were joined to produce a hollow panel structure. In this case, due to the difference in the amount of thermal expansion in the longitudinal direction in the width direction due to the occurrence of the temperature difference in the width direction during friction stir welding, in order to prevent the occurrence of openings in the butted portions and the occurrence of joint defects, Restriction in the width direction was performed.

The working time in the friction stir welding process and the deformation amount of the product hollow panel structure after welding were measured for Example 1 and Comparative Examples 1 and 2, and the results are shown in Table 12 below. The measurement of the amount of deformation was performed by the following method shown in FIG. In the case of upward warpage, as shown in FIG. 22A, the lower surface edge Elb on the left side of the width of the hollow panel structure HPS is pressed so as to come into contact with the upper surface 10us of the flat surface plate 10, and the lower surface on the right end in the width direction. Edge Erb and Surface Plate 1
The gap hu (mm) between the zero and the upper surface 10us was measured at a plurality of locations in the longitudinal direction using a gap gauge, and the maximum value of the gap hu (mm) was taken as the amount of warpage. In the case of downward warpage, as shown in FIG. 22B, the upper left edge Elu of the hollow panel structure HPS is pressed so as to contact the upper surface 10us of the flat surface plate 10, and the upper surface of the right end in the width direction is pressed. The gap hb (mm) between the edge Eru and the upper surface 10us of the surface plate 10 is measured at a plurality of positions in the longitudinal direction with a gap gauge, and the gap hb (m) is measured.
The maximum value of m) was defined as the amount of warpage.

[0141]

[Table 12]

The following can be said from Table 12. (A) The working time of the method of Example 1 was the same as that of Comparative Example 1.
Approximately 1/3 of the operation time of Comparative Example 2 and approximately 1/6 of Comparative Example 2. (b) The deformation amount of the hollow panel structure according to the method of Example 1 was 0.5 mm, which was as small as 1/4 of the deformation amount 2.0 mm of the hollow panel structure according to the method of Comparative Example 1. 2. Deformation amount of hollow panel structure by method 2
mm, which is remarkably smaller than １ ／. 1 as in the comparative example
In the case of joining in pairs, the joint deformation amount is added, and the deformation amount of the entire product panel becomes large. However, when the entire panels are joined at the same time as in the embodiment of the present invention, the amount of deformation of the entire product panel is small because there is no addition of the amount of deformation as described above. Furthermore, since the center material into which the friction stir welding rotary tool is pushed into the left and right joints is given reverse strain, the amount of joint deformation is further suppressed.

[0143] Next, still another embodiment of a method of manufacturing a hollow panel structure of the present invention, and, still another embodiment of the hollow panel structure manufacturing hollow extruded shape member of the present invention, specifically This will be described below with reference to various embodiments.

12. Example 12 The cross-sectional shape and dimensions shown in FIG.
Before the friction stir welding step, the surface of the lower face plate 1 bp of the aluminum-based hollow extruded profile for manufacturing a hollow panel structure having a thickness of m was previously subjected to anodizing treatment and electrolytic coloring treatment, and the three sheets were reciprocated. And a butt portion of the upper face plate 1up was friction stir welded to produce a hollow panel structure.

As a comparative example, an aluminum-based hollow extruded member for manufacturing a hollow panel structure having a sectional shape and dimensions as shown in FIG.
FIG. 2 disclosed in Japanese Patent Application Laid-Open No. 9-309164
As described with reference to No. 3, friction stir welding is performed by friction stir welding the two portions sequentially from the upper surface side and then friction stir welding the remaining two portions on the back surface sequentially after the two portions are inverted. Thus, a hollow panel structure was manufactured.

The surface treatment in the case of the comparative example was performed by each of the following two methods. (1) The surface of the lower face plate 1 bp is previously subjected to anodizing treatment prior to the friction stir welding process, and after the friction stir welding, the thick portions 1 bpt on both sides of the butt joint of the lower face plate 1 bp are ground and polished, and The trace of rotation and movement of the cut-shaped rotary tool for friction stir welding is removed, and the grinding / polishing unit is again subjected to anodizing treatment and electrolytic coloring treatment. (2) Grinding and polishing the thick portions 1 bpt on both sides of the butt joint portion of the lower face plate 1 bp after the friction stir welding without surface treatment in advance before the friction stir welding process, thereby forming an undercut-shaped rotary tool for friction stir welding. The traces of rotation and movement are removed, and thereafter the entire surface of the lower face plate 1 bp is subjected to anodizing treatment and electrolytic coloring treatment.

The cost of the surface treatment (alumite treatment and / or painting treatment) and the grinding and polishing cost of the butt joint of each of the hollow panel structures of the present invention and the comparative examples (1) and (2). Table 13 shows the results of evaluation of the appearance of the surface subjected to the surface treatment (anodizing treatment and electrolytic coloring treatment) from the viewpoint of uniformity of color tone and glossiness.

[0148]

[Table 13]

The following can be said from Table 13. (A) using an embodiment of the hollow panel structure manufacturing hollow extruded shape member of the present invention, the method for manufacturing the hollow panel structure of the present invention of producing aluminum-based hollow panel structure as described above in Example The grinding / polishing cost index is 0, and the total cost index is equivalent to that obtained by independently processing the conventional single product. The cost is the lowest compared to the total cost of the surface treatment and grinding / polishing of Comparative Example (1). (B) Regarding the appearance of the aluminum-based hollow panel structure according to the embodiment of the present invention, the uniformity of color tone and glossiness is not different from the conventional single product. On the other hand, the appearance of the aluminum-based hollow panel structure according to the comparative example (1) is different in that the thickness of the anodic oxide film of the grinding / polishing portion is about twice, and as a result, the color tone of the grinding / polishing portion is pale. Or the part becomes opaque and the part appears to be streaked out. (C) The appearance of the aluminum-based hollow panel structure according to the comparative example (2) is the same as that of the embodiment of the present invention, but requires large surface treatment equipment (liquid tank, suspension jig, current supply jig, etc.). , The equipment cost increases.

The embodiments of the present invention have been described with reference to the accompanying drawings and specific examples. However, the present invention is not limited to these, and is within the scope of the present invention. Therefore, it does not matter that other embodiments are included. For example, in the above-described embodiment, the test material using the specific material of the aluminum alloy hollow extruded shape was described. However, the present invention applies the aluminum-based material other than the above-mentioned materials and the application of extrusion molding and friction stir welding. It is applicable to other possible metal materials.

[0151]

The present invention has the following excellent effects. That is, (1) together with reducing the friction stir welding should point to half or one-third, also abutting portion be omitted restraint in the width direction when the friction stir welding eye opening to junction defects occur Also, there is no need to manufacture and set a special joint for friction stir welding, and there is no undercut trace of the rotation and movement of the rotary tool for friction stir welding on the decorative surface of the product, There is no need to grind and polish after welding, and productivity can be dramatically improved even with ordinary friction stir welding equipment, and equipment costs, maintenance costs, and manufacturing costs can be significantly reduced. . In particular, the downward deformation of the butted portion by the axial pressing force of the rotary tool during friction stir welding can be effectively prevented, it is possible to suppress the occurrence of joint defects caused by the deformation.

[0152] (2) as to allow a cavity like defects visual indeterminable joint bottom by a small thermal deformation of the upper inner peripheral surface of the vertical ribs of the hollow portion side of the butt portion during friction stir welding, bonding It is possible to obtain the quality of the friction stir welding part which can sufficiently cope with the use in which the part strength is not so strictly required.

[0153] (3) at the time of friction stir welding, can also prevent the occurrence of void defects in the visual indeterminable joint bottom by a small thermal deformation of the upper inner peripheral surface of the vertical ribs of the hollow portion side of the butt portion, The quality of the friction stir welded portion can be obtained that can sufficiently cope with applications where the strength of the welded portion is required relatively strictly.

[0154] (4) together with the generation of at least visible void-like defects in the joint bottom by a hollow side of the ribs of the heat deformation of the inner peripheral surface of the upper portion of the vertical ribs of the butt portion can be suppressed or prevented, the vertical ribs A gap is formed in the abutting portion due to deformation and buckling of the minimum thickness portion, and at least a visible defect of the joint at least visible due to the gap can be suppressed or prevented.

Therefore, friction stir welding conditions are determined in advance, and when designing and manufacturing an aluminum-based hollow extruded member for manufacturing a hollow panel structure to be subjected to friction stir welding under these conditions, a stirring pin of a rotary tool for friction stir welding is used. The minimum distance w ₁ (mm) between the outer surface of the rib and the inner peripheral surface of the rib and the thickness w ₂ (mm) of the minimum thickness portion of the rib can be set appropriately according to the required level of the joint quality. For example, the quality of a friction stir welded joint that can sufficiently cope with applications where the strength of the joint is not so demanding, and the quality of a friction stir welded joint that can sufficiently cope with applications where the strength of the joint is relatively severe are required. Can be obtained selectively.

[0156] (5) can be friction stir welding the same time more than three of the cylindrical workpiece from one side, it can increase dramatically productivity. Also, compared to the method of performing friction stir welding on the upper and lower surfaces by synchronizing the movement of the rotating tool from above and below, equipment costs and maintenance costs, including the control device, are lower.
Also, compared to the case of friction stir welding from below, there is no possibility that a joint defect of the lower face plate occurs due to the downward movement and leakage of the plastic fluidized (plasticized) solid phase due to gravity. Also, the amount of joint deformation is reduced.

[0157] (6) Write anodization product on the decorative surface and comprising a surface of the hollow panel structure before friction stir welding, surface treatment was performed such as electrolytic coloring treatment and electrodeposition coating process, a non-decorative surface Friction stir welding of the surfaces of
Polishing is unnecessary, and an excellent decorative surface with high uniformity of color tone and glossiness can be obtained. Also, no large surface treatment equipment is required,
There is no increase in equipment costs and maintenance costs.

[Brief description of the drawings]

1 is a longitudinal sectional view of the main part of the implementation of embodiment viewed from the longitudinal direction of the hollow panel structure of the present invention.

2 is a longitudinal sectional view of the main part of the implementation of embodiment viewed from the longitudinal direction of the hollow panel structure of the present invention.

3 is a longitudinal sectional view of the main part of the implementation of embodiment viewed from the longitudinal direction of the hollow panel structure of the present invention.

4 is a longitudinal sectional view of the main part in the form of implementation as seen from the longitudinal direction of the hollow panel structure of the present invention.

5 (a) is a longitudinal sectional view of the implementation in the form of a hollow panel structure for producing cylindrical workpiece viewed from a longitudinal direction of the present invention,
(b), (c) is an enlarged sectional view of each of the right end and the left end of the hollow extruded profile shown in (a).

6 (a) is a longitudinal sectional view of the implementation in the form of a hollow panel structure for producing cylindrical workpiece viewed from a longitudinal direction of the present invention,
(b), (c) is an enlarged sectional view of each of the right end and the left end of the hollow extruded profile shown in (a).

7 (a) is a longitudinal sectional view of the implementation in the form of a hollow panel structure for producing cylindrical workpiece viewed from a longitudinal direction of the present invention,
(b), (c) is an enlarged sectional view of each of the right end and the left end of the hollow extruded profile shown in (a).

8 (a) is a longitudinal sectional view of the implementation in the form of a hollow panel structure for producing cylindrical workpiece viewed from a longitudinal direction of the present invention,
(b), (c) is an enlarged sectional view of each of the right end and the left end of the hollow extruded profile shown in (a).

An overview of friction stir welding in the form of real <br/> facilities of a manufacturing method of a hollow panel structure of the present invention; FIG, the implementation in the form of a hollow panel structure manufacturing hollow extruded shape member of the present invention It is sectional drawing for demonstrating the definition of each location used by description.

[10] an overview of friction stir welding according to another embodiment of the method for manufacturing the hollow panel structure of the present invention, in the description of another embodiment of a hollow panel structure manufacturing hollow extruded shape member of the present invention It is sectional drawing for demonstrating the definition of the various places used.

FIG. 11 shows a cross-sectional shape and dimensions of a pair of aluminum-based hollow extruded profiles 1a and 1b for manufacturing a hollow panel structure used for friction stir welding according to the first embodiment of the present invention, and a stirring pin 4 for friction stir welding. It is a longitudinal cross-sectional view which shows the positional relationship of.

FIG. 12 shows a pair of aluminum hollow extruded members 1a and 1b for manufacturing a pair of hollow panel structures used in Example 2 of the present invention.
FIG. 3 is a longitudinal sectional view showing a sectional shape and dimensions of the slab.

FIG. 13 is a cross-sectional shape and dimensions of a pair of aluminum-based hollow extruded profiles 1c and 1d for manufacturing a hollow panel structure used in friction stir welding of Example 3 of the present invention, and a stirring pin 4 for friction stir welding. It is a longitudinal cross-sectional view which shows the positional relationship of.

FIG. 14 shows an aluminum hollow extruded profile 1c, 1d for producing a pair of hollow panel structures used in Example 4 of the present invention.
FIG. 3 is a longitudinal sectional view showing a sectional shape and dimensions of the slab.

FIG. 15 is a cross-sectional view showing the mechanism of the occurrence of a hollow defect at the bottom of the joint caused by deformation of the upper inner peripheral surface of the vertical rib 1ar of the aluminum-based hollow extruded profile 1a.

FIG. 16 shows a pair of aluminum hollow extruded profiles 1c,
Sectional view showing the mechanism of the occurrence of hollow defects at the bottom of the joint due to deformation of the vertical rib / fitted portion 1cri on both sides of the butting portion 2 at the rear end of the width 1d and the upper inner peripheral surface side of the vertical rib 1dr. FIG.

FIG. 17 is a longitudinal sectional view showing a sectional shape and dimensions of a pair of aluminum-based hollow extruded profiles 1a and 1b for manufacturing a hollow panel structure used in Examples 6 and 7 of the present invention.

FIG. 18 is a longitudinal sectional view showing a sectional shape and dimensions of a pair of aluminum-based hollow extruded profiles 1c and 1d for manufacturing a hollow panel structure used in Examples 8 and 9 of the present invention.

FIG. 19 shows the minimum thickness portion of the vertical rib 1ar immediately below the butting portion 2 of the pair of aluminum-based hollow extruded profiles 1a and 1b for manufacturing a hollow panel structure used in the sixth and seventh embodiments of the present invention. It is a longitudinal section for explaining the mechanism of generation of a joint defect by deformation and buckling.

FIG. 20 is a vertical rib / fitted portion 1 of a butted portion of each of a pair of hollow aluminum extrusions 1c and 1d for manufacturing a hollow panel structure used in Examples 8 and 9 of the present invention.
It is a longitudinal cross-sectional view for explaining the mechanism of the joint defect generation due to deformation and buckling of the minimum thickness portion of the cri and the vertical rib 1dr.

FIG. 21 (a) shows the cross-sectional shape and dimensions of the aluminum-based hollow extruded profile of the present invention used in Examples 10 and 11, and (b) shows the cross-section of the aluminum-based hollow extruded profile of the comparative example. FIG. 3 is a longitudinal sectional view showing a shape and dimensions, each viewed from a longitudinal direction.

22A and 22B are perspective views illustrating a method of measuring the amount of deformation of the product hollow panel structure, in which FIG. 22A illustrates a case of upward warpage, and FIG. 22B illustrates a case of downward warpage.

FIG. 23 is a longitudinal sectional view showing a first example of the prior art disclosed in Japanese Patent Application Laid-Open No. 9-309164.

FIG. 24 is a longitudinal sectional view showing a second example of the prior art disclosed in Japanese Patent Application Laid-Open No. 9-309164.

FIG. 25 is a longitudinal sectional view showing a third example of the prior art disclosed in Japanese Patent Application Laid-Open No. 9-309164.

FIG. 26 is a longitudinal sectional view showing a fourth example of the prior art disclosed in Japanese Patent Application Laid-Open No. 9-309164.

[Explanation of symbols]

 HPS hollow panel structure 1 hollow extruded profile 1up upper face plate 1bp lower face plate 1A, 1B width direction end 1Aib, 1Bib lower fitting part 1Aibx, 1Bibx first lower fitting part 1Aiby, 1Biby second lower covering Fitting part 1Aiu, 1Biu Upper fitting part 1Au, 1Bu Butting part 1Aun, 1a a missing part 1Ar, 1ar, 1dr Vertical rib 1Briv, 1cri Vertical rib and fitting part 1Ari, 1Bry rib and fitting part 1Bri 1Brix Vertical rib / fitted portion 1a, 1b, 1c, 1d Hollow extruded profile 1as, 1cs, 1ds Vertical rib inner peripheral surface 1af, 1bf Upper surface of upper surface plate 1cf, 1df Upper surface of upper surface plate 2 Butt portion 2u Upper butt portion 2A, 2B Butted surfaces 2g Gap 2gu Gap 3 Rotary tool 3b Bottom 4 Stirring pin 5b the lower engaging portion 5bx first lower fitting portion 5by second lower fitting portion 5u upper fitting portion 6 Friction stir welding unit dfb visible void defects dfs an invisible punctate void defects

Continuation of the front page (56) References JP-A-11-28583 (JP, A) JP-A-9-309164 (JP, A) JP-A-10-328856 (JP, A) JP-A-11-311218 (JP) , A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B23K 20/12

Claims (28)

(57) [Claims] In the extrusion step, a fitting portion is formed at a widthwise end of a plurality of hollow extruded profiles, and a butted portion is formed on one side of a pair of front and back face plates. A plurality of hollow extruded members are formed with a vertical rib that can also support the other butted portion on the hollow portion side immediately below one of the butted portions, and the fitted portions are fitted to each other. Forming a fitting portion by joining the butted portions together to form a butted portion, and friction stir welding the butted portion, wherein the friction stir welding of the butted portion is performed. in, keeping the minimum distance w ₁ between the inner peripheral surface of the hollow portion side of the vertical ribs of the outer surface and the butt portion of the stirring pin of the friction stir welding rotary tool is pressed into the projecting mating portions above 0.6 mm, The inner peripheral surface of the vertical rib on the hollow portion side of the A method for manufacturing a hollow panel structure, wherein friction stir welding is performed while cooling. 2. In the extrusion step, a fitting portion is formed at a width direction end of the plurality of hollow extruded profiles, and a butted portion is formed on one side of a pair of front and back face plates. A vertical rib is formed on one hollow portion side of each of the butted portions of the plurality of hollow extruded profiles, and a vertical rib serving also as a part of the fitted portion is formed on the other hollow portion side. A method of manufacturing a hollow panel structure in which the fitted portions are fitted to each other to form a fitted portion, the butted portions are abutted to each other to form a butted portion, and the butted portions are friction stir welded. In the friction stir welding of the butting portion, the shortest distance between the outer surface of the stirring pin of the rotary tool for friction stir welding pressed into the butting portion and the inner peripheral surface of the vertical rib on the hollow portion side of the butting portion. w ₁ is maintained at 0.6 mm or more, A method for manufacturing a hollow panel structure, wherein friction stir welding is performed while cooling an inner peripheral surface of a vertical rib on a hollow portion side. 3. In the extrusion step, a fitting portion is formed at an end in the width direction of the plurality of hollow extruded profiles, and a butted portion is formed on one side of a pair of front and back face plates. A plurality of hollow extruded members are formed with a vertical rib that can also support the other butted portion on the hollow portion side immediately below one of the butted portions, and the fitted portions are fitted to each other. Forming a fitting portion by joining the butted portions together to form a butted portion, and friction stir welding the butted portion, wherein the friction stir welding of the butted portion is performed. in, keeping the minimum distance w ₁ between the inner peripheral surface of the hollow portion side of the vertical ribs of the outer surface and the butt portion of the stirring pin of the friction stir welding rotary tool is pressed into the projecting mating portions above 0.6 mm, the thickness w ₂ is represented by the following formula of the minimum thickness portion of the vertical ribs And so as to satisfy the following equation 2, the axial pressing force of the rotary tool F
(Kgf) and / or diameter D (mm) of the bottom of the rotating tool
And performing friction stir welding. w ₂ ≧ w _2A = {(F × H) / (1439 × D)} ^1/3 / n Equation 1 w ₂ ≧ w _2B = F / (n × D × σ _0.2 ) —Equation 2 , W _2A : first deformation / buckling limit thickness (mm) w _2B : second deformation / buckling limit thickness (mm) F: axial pressing force (kgf) of rotating tool D: diameter of rotating tool bottom (Mm) σ _0.2 : proof stress of hollow extruded profile (kgf / mm ² ) H: height of hollow extruded profile, ie distance between outer surfaces of a pair of front and back face plates (mm) n: number of vertical ribs at butt portion ( 1 or 2) 4. In the extrusion step, a fitting portion is formed at a widthwise end of the plurality of hollow extruded profiles, and a butted portion is formed on one side of a pair of front and back face plates. A vertical rib is formed on one hollow portion side of each of the butted portions of the plurality of hollow extruded profiles, and a vertical rib serving also as a part of the fitted portion is formed on the other hollow portion side. A method of manufacturing a hollow panel structure in which the fitted portions are fitted to each other to form a fitted portion, the butted portions are abutted to each other to form a butted portion, and the butted portions are friction stir welded. In the friction stir welding of the butting portion, the shortest distance between the outer surface of the stirring pin of the rotary tool for friction stir welding pressed into the butting portion and the inner peripheral surface of the vertical rib on the hollow portion side of the butting portion. w ₁ is maintained at 0.6 mm or more, The axial pressing force F of the rotating tool is set so that the thickness w ₂ of the minimum thickness portion satisfies the following formulas 1 and 2.
(Kgf) and / or diameter D (mm) of the bottom of the rotating tool
And performing friction stir welding. w ₂ ≧ w _2A = {(F × H) / (1439 × D)} ^1/3 / n Equation 1 w ₂ ≧ w _2B = F / (n × D × σ _0.2 ) —Equation 2 , W _2A : first deformation / buckling limit thickness (mm) w _2B : second deformation / buckling limit thickness (mm) F: axial pressing force (kgf) of rotating tool D: diameter of rotating tool bottom (Mm) σ _0.2 : proof stress of hollow extruded profile (kgf / mm ² ) H: height of hollow extruded profile, ie distance between outer surfaces of a pair of front and back face plates (mm) n: number of vertical ribs at butt portion ( 1 or 2) 5. In the extrusion step, a fitting portion is formed at a width direction end of a plurality of hollow extruded profiles, and a butting portion is formed on one side of a pair of front and back face plates. A plurality of hollow extruded members are formed with a vertical rib that can also support the other butted portion on the hollow portion side immediately below one of the butted portions, and the fitted portions are fitted to each other. Forming a fitting portion by joining the butted portions together to form a butted portion, and friction stir welding the butted portion, wherein the friction stir welding of the butted portion is performed. in, keeping the minimum distance w ₁ between the inner peripheral surface of the hollow portion side of the vertical ribs of the outer surface and the butt portion of the stirring pin of the friction stir welding rotary tool is pressed into the projecting mating portions above 1.2 mm, the thickness w ₂ is represented by the following formula of the minimum thickness portion of the vertical ribs And so as to satisfy the following equation 2, the axial pressing force of the rotary tool F
(Kgf) and / or diameter D (mm) of the bottom of the rotating tool
And performing friction stir welding. w ₂ ≧ w _2A = {(F × H) / (1439 × D)} ^1/3 / n Equation 1 w ₂ ≧ w _2B = F / (n × D × σ _0.2 ) —Equation 2 , W _2A : first deformation / buckling limit thickness (mm) w _2B : second deformation / buckling limit thickness (mm) F: axial pressing force (kgf) of rotating tool D: diameter of rotating tool bottom (Mm) σ _0.2 : proof stress of hollow extruded profile (kgf / mm ² ) H: height of hollow extruded profile, ie distance between outer surfaces of a pair of front and back face plates (mm) n: number of vertical ribs at butt portion ( 1 or 2) 6. In the extrusion step, a fitting portion is formed at a width direction end of a plurality of hollow extruded profiles, and a butting portion is formed on one side of a pair of front and back face plates. A vertical rib is formed on one hollow portion side of each of the butted portions of the plurality of hollow extruded profiles, and a vertical rib serving also as a part of the fitted portion is formed on the other hollow portion side. A method of manufacturing a hollow panel structure in which the fitted portions are fitted to each other to form a fitted portion, the butted portions are abutted to each other to form a butted portion, and the butted portions are friction stir welded. In the friction stir welding of the butting portion, the shortest distance between the outer surface of the stirring pin of the rotary tool for friction stir welding pressed into the butting portion and the inner peripheral surface of the vertical rib on the hollow portion side of the butting portion. w ₁ is kept at 1.2 mm or more, The axial pressing force F of the rotating tool is set so that the thickness w ₂ of the minimum thickness portion satisfies the following formulas 1 and 2.
(Kgf) and / or diameter D (mm) of the bottom of the rotating tool
And performing friction stir welding. w ₂ ≧ w _2A = {(F × H) / (1439 × D)} ^1/3 / n Equation 1 w ₂ ≧ w _2B = F / (n × D × σ _0.2 ) —Equation 2 , W _2A : first deformation / buckling limit thickness (mm) w _2B : second deformation / buckling limit thickness (mm) F: axial pressing force (kgf) of rotating tool D: diameter of rotating tool bottom (Mm) σ _0.2 : proof stress of hollow extruded profile (kgf / mm ² ) H: height of hollow extruded profile, ie distance between outer surfaces of a pair of front and back face plates (mm) n: number of vertical ribs at butt portion ( 1 or 2) 7. The axial pressing force F (kgf) of the rotating tool and / or the diameter D of the rotating tool bottom so that the thickness w ₂ of the minimum thickness portion of the vertical rib satisfies the following formulas (1) and (2). 3. The method for manufacturing a hollow panel structure according to claim 1, wherein (mm) is selected and friction stir welding is performed. w ₂ ≧ w _2A = {(F × H) / (1439 × D)} ^1/3 / n Equation 1 w ₂ ≧ w _2B = F / (n × D × σ _0.2 ) —Equation 2 , W _2A : first deformation / buckling limit thickness (mm) w _2B : second deformation / buckling limit thickness (mm) F: axial pressing force (kgf) of rotating tool D: diameter of rotating tool bottom (Mm) σ _0.2 : proof stress of hollow extruded profile (kgf / mm ² ) H: height of hollow extruded profile, ie distance between outer surfaces of a pair of front and back face plates (mm) n: number of vertical ribs at butt portion ( 1 or 2) 8. In the extrusion step, a fitting portion is formed at a width direction end of the plurality of hollow extruded profiles, and a butting portion is formed on one side of a pair of front and back face plates, A method of manufacturing a hollow panel structure in which fitting portions are fitted together to form a fitting portion, the butted portions are abutted against each other to form a butting portion, and the abutting portions are friction stir welded. Simultaneously forming a plurality of butt portions using three or more hollow extruded profiles, and using the friction stir welding equipment equipped with the same number or more of friction stir welding rotary tools as the number of the butted portions, A method for producing a hollow panel structure, characterized in that parts are simultaneously subjected to friction stir welding. 9. In the extruding step, a vertical rib capable of supporting the other butted portion is formed on the hollow portion side of one of the plurality of hollow extruded shapes immediately below the butted portion. The method for manufacturing a hollow panel structure according to claim 8, wherein: 10. In the extrusion step, a vertical rib is provided on one hollow side of each of the abutted portions of the plurality of hollow extruded profiles, and a part of the fitted portion is provided on the other hollow side. 9. The method for manufacturing a hollow panel structure according to claim 8, wherein vertical ribs serving also as (1) are formed. 11. The friction stir welding of the butting portion is performed between an outer surface of a stirring pin of a rotary tool for friction stir welding pressed into the butting portion and an inner peripheral surface of a vertical rib on a hollow portion side of the butting portion. The method for producing a hollow panel structure according to claim 9, wherein the shortest distance w ₁ is maintained at 0.6 mm or more. 12. The shortest distance w ₁ between the outer surface of the stirring pin of the rotary tool for friction stir welding pushed into the butting portion and the inner circumferential surface of the vertical rib on the hollow side of the butting portion is set to 1.
The method for manufacturing a hollow panel structure according to claim 11, wherein the thickness is maintained at 2 mm or more. 13. A friction stir welding apparatus equipped with three or more hollow extruded sections at the same time and a plurality of butting parts, and the same number or more of friction stir welding rotary tools as the number of said butting parts, The method for manufacturing a hollow panel structure according to any one of claims 1 to 7, wherein the plurality of butted portions are simultaneously subjected to friction stir welding. 14. In the extrusion step, a fitted portion is formed at a width direction end of the plurality of hollow extruded profiles, and a butted portion is formed on one side of a pair of front and back face plates. A method of manufacturing a hollow panel structure in which fitting portions are fitted together to form a fitting portion, the butted portions are abutted against each other to form a butting portion, and the abutting portions are friction stir welded. Prior to the friction stir welding step, anodizing, electrolytic coloring, or electrodeposition coating is performed on the outer surface of the face plate of the plurality of hollow extruded profiles opposite to the face plate on which the butt portion is formed. A method for producing a hollow panel, which is characterized in that it has been processed. 15. In the extruding step, a vertical rib capable of supporting the other butted portion is formed on the hollow portion side of one of the plurality of hollow extruded shapes immediately below the butted portion. The method for manufacturing a hollow panel structure according to claim 14, wherein: 16. In the extruding step, a vertical rib is provided on one hollow side of each of the abutted portions of the plurality of hollow extruded profiles, and a part of the fitted portion is provided on the other hollow side. The method for manufacturing a hollow panel structure according to claim 14, wherein vertical ribs serving also as (1) are formed. 17. At the time of friction stir welding of the butting portion, a gap between an outer surface of a stirring pin of a rotary tool for friction stir welding to be pushed into the butting portion and an inner peripheral surface of a vertical rib on a hollow portion side of the butting portion. method for producing a hollow panel structure according to claim 15 or claim 16 characterized in that to keep the shortest distance w ₁ than 0.6 mm. 18. The shortest distance w ₁ between the outer surface of the stirring pin of the rotary tool for friction stir welding pressed into the butting portion and the inner peripheral surface of the vertical rib on the hollow side of the butting portion is set as 1.
The method for manufacturing a hollow panel structure according to claim 17, wherein the thickness is maintained at 2 mm or more. 19. An outer surface of a face plate of the plurality of hollow extruded shapes opposite to the face plate on which the abutted portion is formed, is subjected to anodizing treatment, electrolytic coloring treatment, or electrolytic coloring treatment prior to a friction stir welding step. The method for producing a hollow panel structure according to any one of claims 1 to 13, wherein an electrodeposition coating process is performed. 20. A fitting portion is formed at an end in a width direction, and a butted portion is formed on one side of a pair of front and back face plates, and each of the butted portions of a plurality of hollow extruded profiles is formed. A hollow extruded member for manufacturing a hollow panel structure, wherein a vertical rib that can also support the butted portion on the other side is formed on the hollow portion side of the butted portion on one side; The outer surface of the stirring pin of the rotary tool for friction stir welding to be pushed into the butting portion and the hollow portion of the butting portion at a predetermined joining depth in the friction stir welding of the butting portion formed by abutting the butted portions of the shapes. the shortest distance w ₁ between the inner circumferential surface of the vertical ribs of the side to keep the above 0.6 mm, preformed, the thickness w ₂ of the minimum thickness portion of the vertical ribs of the following formula 1 and formula 2 Characterized by pre-formed to satisfy The hollow panel structure manufacturing hollow extruded shape member. w ₂ ≧ w _2A = {(F × H) / (1439 × D)} ^1/3 / n Equation 1 w ₂ ≧ w _2B = F / (n × D × σ _0.2 ) —Equation 2 , W _2A : first deformation / buckling limit thickness (mm) w _2B : second deformation / buckling limit thickness (mm) F: axial pressing force (kgf) of rotating tool D: diameter of rotating tool bottom (Mm) σ _0.2 : proof stress of hollow extruded profile (kgf / mm ² ) H: height of hollow extruded profile, ie distance between outer surfaces of a pair of front and back face plates (mm) n: number of vertical ribs at butt portion ( 1 or 2) 21. A fitting portion is formed at an end in the width direction, and a butted portion is formed on one side of a pair of front and back face plates, and each of the butted portions of a plurality of hollow extruded profiles is formed. A hollow panel structure in which a vertical rib is formed on the hollow portion side of the butted portion on one side, and a vertical rib serving also as a part of the fitted portion is formed on the hollow portion side of the butted portion on the other side. A hollow extruded shape for manufacturing a body, wherein a friction stir welding is performed at a predetermined joining depth in a friction stir welding of a butt portion formed by abutting the butt portions of a plurality of hollow extruded shapes. the shortest distance w ₁ between the inner peripheral surface of the hollow portion side of the vertical ribs of the outer surface and the butt portion of the stirring pin of use rotary tool so as to maintain the above 0.6 mm, preformed, a minimum of the vertical ribs to a thickness w ₂ of the thick portion satisfy the following formula 1 and formula 2 As such, the hollow panel structure for producing cylindrical workpiece, characterized in that preformed. w ₂ ≧ w _2A = {(F × H) / (1439 × D)} ^1/3 / n Equation 1 w ₂ ≧ w _2B = F / (n × D × σ _0.2 ) —Equation 2 , W _2A : first deformation / buckling limit thickness (mm) w _2B : second deformation / buckling limit thickness (mm) F: axial pressing force (kgf) of rotating tool D: diameter of rotating tool bottom (Mm) σ _0.2 : proof stress of hollow extruded profile (kgf / mm ² ) H: height of hollow extruded profile, ie distance between outer surfaces of a pair of front and back face plates (mm) n: number of vertical ribs at butt portion ( 1 or 2) 22. The shortest distance w ₁ between the outer surface of the stirring pin of the rotary tool for friction stir welding pushed into the butting portion and the inner peripheral surface of the vertical rib on the hollow side of the butting portion is set to 1.
22. The hollow extruded shape for manufacturing a hollow panel structure according to claim 20, wherein the hollow extruded material is formed in advance so as to be maintained at 2 mm or more. 23. A fitting portion is formed at an end portion in the width direction, a butted portion is formed on one side of a pair of front and back face plates, and a side opposite to the face plate on which the butted portion is formed. The outer surface of the face plate is anodized in advance of the friction stir welding process,
A hollow extruded member for manufacturing a hollow panel structure, which is subjected to electrolytic coloring treatment or electrodeposition coating. 24. A vertical rib capable of supporting the butted portion on the other side is formed on the hollow portion side of the butted portion on one side of each of the butted portions of the plurality of hollow extruded profiles. The hollow extruded shape for manufacturing a hollow panel structure according to claim 23, characterized in that: 25. A vertical rib is provided on the hollow side of the butted portion on one side of each of the butted portions of the plurality of hollow extruded profiles, and the vertical rib is provided on the hollow side of the butted portion on the other side. 24. The hollow extruded profile for manufacturing a hollow panel structure according to claim 23, wherein a vertical rib serving also as a part of the fitting portion is formed. 26. A stirring pin of a rotary tool for friction stir welding to be pushed into said butting portion at a predetermined joining depth in friction stir welding of a butting portion formed by abutting said butting portions of a plurality of hollow extruded profiles. And the shortest distance w between the outer surface of the vertical rib and the inner peripheral surface of the vertical rib on the hollow portion side of the butting portion.
26. The hollow extruded section for manufacturing a hollow panel structure according to claim 24, wherein the section is formed in advance so that ₁ is maintained at 0.6 mm or more. 27. The shortest distance w ₁ between the outer surface of the stirring pin of the rotary tool for friction stir welding pressed into the butting portion and the inner peripheral surface of the vertical rib on the hollow side of the butting portion is set to 1.
27. The hollow extruded shape for manufacturing a hollow panel structure according to claim 26, wherein the hollow extruded shape is formed in advance so as to be kept at 2 mm or more. 28. A thickness w _{2 of} a minimum thickness portion of the vertical rib.
28. The hollow extruded member for manufacturing a hollow panel structure according to claim 26, wherein the hollow extruded member is formed in advance so that the following formulas 1 and 2 are satisfied. w ₂ ≧ w _2A = {(F × H) / (1439 × D)} ^1/3 / n Equation 1 w ₂ ≧ w _2B = F / (n × D × σ _0.2 ) —Equation 2 , W _2A : first deformation / buckling limit thickness (mm) w _2B : second deformation / buckling limit thickness (mm) F: axial pressing force (kgf) of rotating tool D: diameter of rotating tool bottom (Mm) σ _0.2 : proof stress of hollow extruded profile (kgf / mm ² ) H: height of hollow extruded profile, ie distance between outer surfaces of a pair of front and back face plates (mm) n: number of vertical ribs at butt portion ( 1 or 2)