JP2812908B2 - Aluminum cylindrical panel and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum cylindrical container used for a pressure-resistant container which requires light weight and high rigidity, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, an aluminum pressure vessel has been manufactured by processing a plate into a rectangular parallelepiped or cylindrical shape and welding and joining the plate. However, since the container made of sheet material has a membrane structure, in order to secure strength and prevent deformation due to internal and external pressure differences,
It is necessary to increase the thickness of the plate, which causes a problem that the weight of the entire container increases. An aluminum pressure-resistant container using a lightweight and high-rigidity aluminum honeycomb panel is disclosed in Japanese Patent Application Laid-Open No. Hei 2-109297. The invention disclosed in this publication is to weld a flat aluminum honeycomb panel and obtain a rectangular parallelepiped pressure-resistant container, but it is needless to say that the rectangular parallelepiped shape is more disadvantageous in pressure-resistant strength than a cylindrical container. However, there is a problem that the weight increases accordingly.

[0003]

As means for forming a cylindrical pressure-resistant container using a honeycomb panel, for example, the following method can be considered. (1) A method of arranging honeycomb cores between inner and outer face plates formed into a cylindrical shape and brazing and integrating them to obtain a cylindrical honeycomb panel. (2) A method of manufacturing a cylindrical honeycomb panel by bending a brazed planar honeycomb panel, assembling the obtained plurality of curved honeycomb panels into a cylindrical shape, and welding.

[0004] When using the above-mentioned means (1), generally,
A gap is formed between the core members that form the honeycomb core geometrically and between the face plate and the honeycomb core. Since there is a gap between the core members, the honeycomb cells of the hexagonal prism are not completely formed, and this is a honeycomb panel after brazing. There is a problem that a gap between the face plate and the honeycomb core causes a reduction in rigidity, brazing failure occurs between the face plate and the honeycomb core, and an operation of assembling the honeycomb core into a cylindrical shape is very troublesome. In addition, Japanese Patent Application No. 5-3 filed by the present applicant.
The use of the core member for a curved honeycomb panel described in Japanese Patent Application No. 34797 or Japanese Patent Application No. 5-334798 substantially eliminates the above problems, but does not solve the above problems.

On the other hand, when using the means (2),
When manufacturing curved honeycomb panels with large curvatures (cylindrical containers with small diameters), the honeycomb core is sheared and buckled during bending, and finally the cylindrical honeycomb panels are manufactured by welding. Are difficult. In addition, Ishikawajima Harima Technical Report (Heisei 5
November, Vol. 33, No. 6, pp. 414-419)
Discloses a bending method in which a shear force is not applied to a honeycomb core, but does not solve the above problem.

According to the present invention, a conventional cylindrical panel using a honeycomb core has many manufacturing restrictions as described above.
It was made in view of the difficulty in manufacturing a lightweight, high-rigidity cylindrical panel with high accuracy regardless of the degree of curvature, and the double-sided board and core were brazed firmly without gaps, and panel assembly work It is an object of the present invention to obtain an integral brazed cylindrical panel which is easy to perform, and to obtain an integral brazed cylindrical panel having a high roundness.

[0007]

The aluminum cylindrical panel according to the present invention comprises a cylindrical inner plate and an outer plate, and a corrugated core material sandwiched between both side plates, wherein the core material is arranged in a circumferential direction. It is arranged so that it has a continuous corrugated cross-section and the undulation of the corrugation runs vertically in the cylinder axis direction (in other words, the peaks or valleys of the corrugation run parallel to the cylinder axis direction), and the double-sided board and the core material are brazed to each other. It is characterized by being joined. Then, if necessary, an annular frame member for reinforcement is integrally provided between both end plates of the panel and / or the intermediate side plate.

In the above-mentioned cylindrical panel, the core material is formed in a corrugated shape, and the core material is arranged between the two side plates so that the undulation of the corrugation passes vertically in the cylinder axis direction. It can be bent freely along the inner and outer surfaces of the shape, and can be easily arranged between the two side plates. In addition, since it can be freely expanded and contracted in the circumferential direction, it is easy to adjust the height of the core material according to the target thickness of the cylindrical panel.

The method for manufacturing an aluminum cylindrical panel according to the present invention is characterized in that an aluminum brazing sheet clad with a brazing material is cylindrically wound so that the brazing material surface is on the outside, and the brazing material surface is also on the inside. A core material formed by forming an aluminum brazing sheet clad with brazing material on both sides into a continuous corrugated shape between outer surface plates wound into a cylindrical shape so that the core material has a corrugated cross-sectional shape continuous in a circumferential direction. The corrugations are arranged so that the undulations extend vertically in the cylindrical axis direction, and the double-sided board and the core material are brazed and joined.

As a preferred specific example of the method for manufacturing the aluminum cylindrical panel, a metal cylindrical jig having a curvature corresponding to the inner diameter of the aluminum cylindrical panel is provided around a metal cylindrical jig.
The inner surface plate, the core material and the outer surface plate are sequentially arranged, and the outer periphery of the outer surface plate is restrained by a metal molding cylinder having a curvature corresponding to the outer diameter of the aluminum cylindrical panel. Tension is applied to the molding cylinder by the difference between the thermal expansion of the face plate and the thermal expansion of the molding cylinder, thereby applying a surface pressure to the inner and outer panels and the core material.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. First, FIG. 1 shows an example of an aluminum cylindrical panel according to the present invention, in which a corrugated core material 3 is sandwiched between an outer surface plate 1 and an inner surface plate 2 wound in a cylindrical shape and brazed to each other. I have. Reference numeral 4 denotes an annular frame member for reinforcement integrally attached to both ends of the cylindrical panel by welding. In this example, the core material 3 is a trapezoidal continuous body including a flange portion 3a parallel to the faces of the face plates 1 and 2 and a web portion 3b inclined with respect to the faces of the face plates 1 and 2, and each of the flange portions 3a and the web Part 3b
Runs parallel to the cylinder axis. The flange portion 3a is brazed to the face plates 1 and 2, and preferably, (the height h of the web portion / the width w of the flange portion) is in the range of 1 to 20, and the inclination angle of the web portion 3b with respect to the face plates 1 and 2. theta ₁ is in the range of 45 to 90 degrees.

In the core material 3, the preferable range of (h / w) is set to 1 to 20 when (h / w) <1.
Depending on the size of w, the thickness of the cylindrical panel becomes smaller,
The advantage of the double cylindrical panel of light weight and high rigidity is small, and when (h / w)> 20, the diameter of the cylindrical container is expected to be considerably large, again depending on the size of w,
This is because production becomes impossible in practice. As a realistic numerical value, w may be set to, for example, about 5 to 10 mm. Also, the preferable range of the inclination angle theta ₁ forty-five to nine
The reason why the angle is set to 0 degree is as follows. That is, the web portion 3b bears the shearing force acting on the cylindrical panel,
When the angle is set to 45 degrees or less, the shear stress acting on the web portion 3b increases, and it is necessary to increase the thickness of the web portion in order to reduce the shear stress, which increases the weight.

FIG. 2 shows another example of an aluminum cylindrical panel according to the present invention, in which a plurality of reinforcing annular members are provided at a predetermined interval between both side plates 1 and 2 at an axially intermediate portion of the cylindrical panel. The frame member 5 is sandwiched between the end of the cylindrical panel and the annular frame member 5.
A core member 3 identical to that shown in FIG. 1 is sandwiched between the annular members 5 and 5 in the same arrangement, brazed and integrated with each other. Also in this example, the annular member 4 is integrally attached to the end of the cylindrical panel by welding.

FIG. 3 shows still another example of the above-mentioned aluminum cylindrical panel. Here, the core material 7 is not a trapezoidal shape, but a waveform having a circular top portion 7a and a web portion 7b inclined with respect to the surface of the face plate. It is a continuum of the shape, the top 7a
Has a line contact with the double-sided plates 1 and 2 and is joined by brazing. Preferably, the diameter of the top 7a is 1 to 10 m
m, the inclination angle θ _{2 of the} web portion 7b with respect to the face plate is 4
The range is 5 to 90 degrees. In the above heartwood 7,
The preferable range of the diameter of the top portion 7a is 1 to 10 mm, because it is difficult to form the shape when the thickness is less than 1 mm, and when it exceeds 10 mm, the density of the web portion 7b that receives the shearing force becomes too small. The preferred range of the inclination angle θ ₂ is 45
The angle of 90 degrees is set for the reason described above.

Next, an example of a procedure for manufacturing an aluminum cylindrical panel according to the present invention will be described with reference to FIGS. (1) Setting of a brazing die First, as shown in FIG. 4, a brazing die shaft 11 is set on a brazing die fixing jig 12. At both ends of the brazing die shaft 11, right female screws 13 are fixed at intervals of 120 ° in the circumferential direction by welding or the like.
A male screw 14 is screwed into the male screw 14, and a nut 15 is fixed to the male screw 14 by welding or the like.
4 and nut 15 form a set to form a brazing mold (described later)
Of the diameter adjuster.

The brazing die 16a shown in FIG. 5 has a curvature (curvature radius R ₀ ) corresponding to the target inner diameter of the aluminum cylindrical panel on the surface side, and a curvature adjusting guide rail 17 on both side surfaces. Are provided, and are assembled into a cylinder in a set of three. A left female screw 18 is fixed to both ends on the back side, and as shown in FIG.
Is inserted and the nut 15 is rotated to form the brazing mold shaft 1.
Fix to 1. Hereinafter, the brazing molds 16b and 16c are fixed to the brazing mold shaft 11 as shown in FIGS. The mounting radius R ₁ of the brazing mold 16a~16c at this time is set to be smaller than said predetermined radius R _0. The set of the brazing die shaft 11 and the brazing dies 16a to 16c in this state is hereinafter referred to as a brazing cylindrical jig 19. As shown in FIG. 9, a curvature adjusting ring 21 is applied to both sides of the brazing cylindrical jig 19 and assembled around the curvature adjusting guide rail 17 so that the clearance between the two becomes zero. Fine adjustment is made while rotating the nut 15, and the outer peripheral radius of the brazing cylindrical jig 19 is set to _R0 .

(2) Assembly of Cylindrical Panel (a) Setting of Inner Plate 2 ′ The brazing cylindrical jig 19 is set on a pair of turning rollers 22 as shown in FIG. The end of the inner plate 2 'is fixed to the surface of the brazing cylindrical jig 19 with the fixing member 24a, and the inner plate 2' is fixed to the brazing cylindrical jig 19 while rotating the turning roller 22 in the rotation direction a. Wrap around the surface. While winding the inner surface plate member 2 ', the middle is fixed to the surface of the brazing cylindrical jig 19 in sequence by the fixing members 24b and 24c, and the other end is fixed by the fixing member 24d. Next, as shown in FIG.
By tightening the inner plate 2 'from the outer periphery at 5,
Finally, the inner plate member 2 ′ is fixed to the surface of the brazing cylindrical jig 19, and the fixing members 24 a to 24 d are further tightened, and then the band 25 is removed.

(B) Setting the corrugated plate 3 'After the fixing member 24b is removed from the brazing cylindrical jig 19, the end of the corrugated plate 3' is again brazed with the fixing member 24b. , And the corrugated plate 3 ′ is wound around the inner plate 2 ′ while rotating the turning roller 22 in the rotation direction b. Hereinafter, in the same procedure, the corrugated plate 3 ′ is fixed to the fixing member 24.
After the corrugated plate 3 'is wound around the inner surface plate 2 while detaching the a, 24d, and 24c, the other end is fixed to the fixing member 24e.
Fix with.

(C) Setting of the outer plate 1 ′ The outer plate 1 ′ is fixed to the fixing member 2 in the same manner as in the above (b).
After the 4a is removed from the brazing jig 19, the outer plate 1 'is removed.
Is fixed to the corrugated plate 3 'again with the fixing member 24a, and the outer plate 1' is wound around the corrugated plate 3 'while rotating the turning roller 22 in the rotation direction a. Hereinafter, in the same procedure, the fixing members 24b, 24e, 24
After the outer plate 1 'is wound around the corrugated plate 3' while attaching and detaching c, the other end of the outer plate 1 'is fixed with the fixing member 24d. Next, as shown in FIG.
By tightening the outer plate 1 'from the outer periphery at 5,
Finally, the outer plate 1 'is fixed to the corrugated plate 3', and the fixing members 24a to 24e are removed. Next, as shown in FIG. 11, the band 25 of the block 1 (b ₁ ) portion is removed, and a molding cylinder 26 composed of a pair of metal bands 26 a having a flange portion 26 b is fitted around the outer surface plate 1 ′. , The inner plate 2 ', the corrugated plate 3' and the outer plate 1 '.
Is fixed to the brazing cylindrical jig 19. Hereinafter, in the same procedure, block 2 (b ₂ ), block 3
The band 25 of the part (b ₃ ) is removed, and the inner plate 2 ′, the corrugated plate 3 ′, and the outer plate 1 ′ are fixed to the brazing cylindrical jig 19 with the forming cylindrical body 26.

The upper plate 1 'and the lower plate 2'
It is a glazing sheet in which a 4004 alloy brazing material is clad on one surface of a plate material made of 6951 alloy, and the brazing material surface is arranged on the side of the corrugated plate material 3 '. In addition, the corrugated plate 3 ′ is provided on both sides of the plate made of the 6951 alloy.
A glazing sheet clad with a 04 alloy brazing material is formed into a wavy shape.

(3) Brazing The brazing cylindrical jig 19 assembled in the manner described above,
The set of the cylindrical panel assembly 28 and the forming cylindrical body 26 is reset on the brazing die fixing jig 12 shown in FIG. 6, and then brazed in a vacuum furnace. At the time of vacuum brazing, since the thermal expansion coefficient of the aluminum material is set to be larger than the thermal expansion coefficients of the brazing cylindrical jig 19 and the forming cylindrical body 26, a tension is applied to the forming cylindrical body due to a difference in the amount of thermal expansion. Is applied, whereby an appropriate surface pressure acts between the inner and outer plate materials 1 ', 2' and the corrugated plate material 3 ', and the inner and outer plate materials 1', 2 'and the corrugated plate material 3' are integrally brazed without gaps.

(4) Removal of Cylindrical Panel After brazing, the molding cylinder 26 is removed. The diameter of the brazing molds 16a to 16c is reduced by the brazing mold diameter adjuster described above so that the brazed cylindrical panel 28 can be removed from the brazing cylindrical jig 19. After the brazing cylindrical jig 19 and the cylindrical panel 28 are erected as shown in FIG. 12, the brazing cylindrical jig 19 is removed from the cylindrical panel 28 from above.

(5) Roundness of Cylindrical Panel 28 Table 1 shows the results of measuring the roundness of the cylindrical panel 28 manufactured by the above method. Excellent roundness within ± 0.1% of the planned diameter.

[0024]

[Table 1]

The cylindrical panel 28 thus manufactured
In order to manufacture a pressure-resistant container by using, for example, as shown in FIG. 1, an annular frame member 4 or the like is appropriately joined to both ends thereof by welding, and at least one end is formed of an aluminum plate and / or an aluminum honeycomb panel. You should close it.

Next, with reference to FIGS. 13 and 14, an example of a method of manufacturing a cylindrical panel integrally provided with a reinforcing annular frame material between both side plates at an intermediate portion of the panel will be described. (1) Brazing mold set-Same as the previous manufacturing method.

(2) Assembly of Cylindrical Panel (a) Set of Inner Surface Plate 2 'Same as the above manufacturing method. Next, as shown in FIG.
By tightening the inner plate 2 'from the outer periphery at 5,
Finally, the inner plate member 2 'is fixed to the surface of the brazing cylindrical jig 19, and the fixing members 24a to 24d are removed.

(B) Setting of the corrugated plate 3 'As shown in FIG. 13, the band 25 of the block 1 (b ₁ ) is once removed, and the corrugated plate 3' is turned on the inner plate 2 'while rotating the turning roller 22. After winding, the corrugated plate 3 ′ of the block 1 (b ₁ ) portion is again applied with the band 25.
Is fixed to the inner plate 2 ′. Next, a pair of reinforcing annular frame members 5 'shown in FIG.
As shown in FIG. 13, it is set on the inner surface plate 2 'and joined by welding (weld portion M). For the blocks 2 (b ₂ ) and 3 (b ₃ ), the corrugated plate 3 ′ and the reinforcing annular frame are fixed on the inner plate 2 ′ in the same procedure as described above.

The subsequent steps (setting of outer plate 1 ', brazing, removal of cylindrical panel) are performed in the same manner as in the manufacturing method described above. Thereby, as shown in FIG. 2, a plurality of annular frame members 5 for reinforcement are sandwiched between the two side plates 1 and 2 at the intermediate portion in the axial direction of the cylindrical panel at predetermined intervals, and The core member 3 is sandwiched between the annular frame members 5 and between the annular members 5 and 5, and these are brazed to each other to obtain an integrated aluminum cylindrical panel.

[0030]

According to the present invention, it is easy to assemble the panel regardless of the degree of curvature of the cylinder, and the core material is arranged along the face plate so that there is no gap between the face plate and the core material, so that brazing failure occurs. There is no. In addition, a cylindrical panel can be manufactured only by brazing, and in particular, by brazing in a state where the inside and outside of the cylindrical panel assembly are restrained, a panel with high roundness can be obtained.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view (a), a side view (b), an enlarged cross-sectional view (A) of an A section, and a B section of a cylindrical panel according to the present invention.
It is a B sectional drawing (d).

FIG. 2 is a partially cutaway front view of another cylindrical panel (provided with a reinforcing annular frame material between both side plates at an intermediate portion in the axial direction) according to the present invention.

FIG. 3 is an enlarged sectional view of a main part of still another cylindrical panel according to the present invention.

FIG. 4 shows a method of manufacturing a cylindrical panel according to the present invention.
It is a front view (a) of a brazing die axis for explaining a brazing die setting process, and its CC sectional view.

FIG. 5 is a perspective view of the brazing mold.

FIG. 6 is an explanatory view of a procedure for attaching a brazing mold.

FIG. 7 is an explanatory diagram of a procedure for attaching a brazing mold.

FIG. 8 is an explanatory view of a procedure for attaching a brazing mold.

FIG. 9 is an explanatory view of a curvature adjusting procedure of the brazing cylindrical jig, which is a partially cutaway front view (a) of the brazing cylindrical jig, a side view (b) of the curvature adjusting ring, and the like. It is a front view (c).

FIG. 10 is a side view (a) and a front view (b) of a brazing cylindrical jig and the like for explaining a cylindrical panel assembling step in the method for manufacturing a cylindrical panel according to the present invention.

FIG. 11 is a side view (a), a front view (b), and a detailed view (D) of a portion D of a brazing cylindrical jig and the like for explaining a tightening procedure of the forming cylindrical body.

FIG. 12 is an explanatory diagram of a step of taking out a cylindrical panel in the method of manufacturing a cylindrical panel according to the present invention.

FIG. 13 is an explanatory diagram of a procedure for assembling a reinforcing annular frame member in another method of manufacturing a cylindrical panel according to the present invention.

FIG. 14 is a front view (b) of the above annular frame member for reinforcement, and FIG.
It is E sectional drawing (b).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer board 1 'Outer board material (material) 2 Inner board 2' Inner board material (material) 3 Core material 3 'Corrugated board material (material) 4, 5 Annular frame material 5' Annular frame material (material) 7 Core material

Continued on the front page (72) Inventor Toshihiko Sasaki 14-1, Chofu Minatomachi, Shimonoseki City, Yamaguchi Prefecture Inside of Kobe Steel, Ltd. Chofu Works (72) Inventor Isamu Ueki 141-1, Nagafuminatocho, Shimonoseki City, Yamaguchi Prefecture Stock Company Kobe Steel, Ltd. Chofu Works (56) References JP-A-6-7867 (JP, A) JP-A-6-7866 (JP, A) JP-A-5-161933 (JP, A) JP-A-7 JP-185793 (JP, A) JP-A-7-186311 (JP, A) JP-A-7-186312 (JP, A) JP-A-2-102973 (JP, A) JP-A-58-81268 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B23K 1/00 330 B21D 47/00 B23K 37/053 B32B 1/08 B32B 3/12

Claims (6)

(57) [Claims] 1. A core material having a corrugated shape sandwiched between a cylindrical inner surface plate and an outer surface plate and a double-sided plate, wherein the core material has a circumferentially continuous corrugated cross-sectional shape, and the corrugation has a cylindrical axis. An aluminum cylindrical panel, which is disposed so as to extend vertically in a direction, and wherein a double-sided plate and a core material are brazed to each other. 2. The core material is a trapezoidal continuum comprising a flange parallel to the face plate and a web inclined with respect to the face plate, wherein the flange is joined to the face plate;
The ratio of (web part height / flange part width) is in the range of 1 to 20, and the inclination angle of the web part with respect to the face plate is 45 to 9
The aluminum cylindrical panel according to claim 1, wherein the angle is within a range of 0 degrees. 3. The core material is a corrugated continuum having a circular top line-contacting the face plate and a web portion inclined with respect to the face plate surface, wherein the top portion is joined to the face plate, and the diameter of the top portion is 1 mm. 2. The aluminum cylindrical panel according to claim 1, wherein the inclination angle of the core member with respect to the face plate is in a range of 45 to 90 degrees. 3. 4. The aluminum cylindrical panel according to claim 1, wherein an annular frame member for reinforcement is integrally provided between both side plates at an end portion and / or an intermediate portion of the panel. . 5. An aluminum brazing sheet clad with a brazing material, between an inner surface plate cylindrically wound with the brazing material surface outside and an outer surface plate similarly cylindrically wound with the brazing material surface inside. A core material formed by forming an aluminum brazing sheet clad with brazing material on both sides into a continuous corrugated shape, the core material has a circumferentially continuous corrugated cross-sectional shape, and the undulation of the corrugation passes vertically in the cylindrical axis direction. A method for producing an aluminum cylindrical panel, comprising: disposing the two-sided plate and the core material by brazing; 6. An inner plate, a core material, and an outer plate are sequentially arranged around a metal cylindrical jig having a curvature corresponding to the inner diameter of the aluminum cylindrical panel, and the outer periphery of the outer plate is fixed to the aluminum cylindrical panel. It is constrained by a molding cylinder having a curvature corresponding to the outer diameter, and tension is applied to the molding cylinder by the difference between the amount of thermal expansion of the core material and the inner and outer face plates and the amount of thermal expansion of the molding cylinder during brazing. The method according to claim 5, wherein a surface pressure is applied to the inner and outer panels and the core material.