JPS6021060B2 - lightweight structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lightweight aircraft structure suitable for use in, for example, floating vehicles.

The superconducting coil of the levitation vehicle is housed in a huge dewar vessel filled with liquid He, etc.

As shown in Figure 1, the walls of this duer vessel are made of hollow aluminum 1 reinforced with SUS stainless steel 2, and therefore require a huge amount of manufacturing man-hours and the overall external size is very large. . Typically, levitated vehicles, like aircraft, must be as light as possible.

However, as mentioned above, the dewar vessel installed on a floating vehicle occupies more space in the cutout part, making the overall shape larger, and because atmospheric pressure is applied to the outer and inner walls, the wall pressure of aluminum 1 increases. In order to increase the thickness of the bone or increase the number of bones in the non-criteria part from the point of view of strength,
As a result, there is a problem that it becomes a large and heavy object. Therefore, in recent years, aluminum honeycomb structure and paper honeycomb strong bait RP (Fi Rei Mor) have been adopted in aircraft.
edPlastics), etc., but they have drawbacks such as being expensive, unsuitable for mass production, and difficult to perform secondary processing.

The present invention has been made in view of the above-mentioned circumstances, and after crimping the non-crimping preventive agent-applied portion of the plastic part coated with the anti-crimping agent in a predetermined shape to a metal plate using a pressure bag bonding method or the like, The non-crimped part forms a framework to create a structure of a predetermined shape, thereby providing a lightweight structure that is easy to bend, has strong mechanical strength, and is easy to perform secondary processing such as welding. It is something.

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

FIG. 2 shows an example in which the superconducting coil is applied to a superconducting coil mounted on a floating vehicle. For example, two superconducting coils 11a and 11b are housed inside an L-shaped stainless steel container 10. Furthermore, by covering the outside of the stainless steel container 10 with a roller bond material 12 made by a roller bond method,
A superconducting coil structure as shown in FIG. 2a is produced. Then, compressed air is placed inside this roller bond material 12.
By injecting high pressure fluid such as high pressure gas or high pressure water,
As shown in FIG. 2b, the roller bond material 12 is inflated to complete a lightweight structure of a predetermined shape. After the structure as described above is completed, liquid H is filled inside the stainless steel container 10.
e (extremely low and high liquefied gas), etc., and the space between the stainless steel container 10 and the roller bond material 12 is evacuated and sealed using a vacuum pump or the like.

In this case, the corners of the structure may not bulge out as shown in FIG. 2c, but this is not a problem because the corners will not deform even when pressed by atmospheric pressure. Here, an example of making the roller bond material 12 using the roller bond method will be described with reference to FIG. 3. For example, as shown in Figure a, a plastic member 12c is inserted between thin metal plates 12a, 12a (for example, aluminum plates), which is made by applying an anti-crimping agent 12b such as carbon paint or ceramic powder paint in a predetermined shape. After that, by pressing from the outside using a roller or the like, the non-pressure prevention coated portion of the plastic member 12c interposed between the two metal plates 12a, 12a is pressed against the two metal plates 12a,
12a (see FIG. 3b). Thereafter, the outside of the stainless steel container 10 is covered with the roller bond material 12 made as described above. Next, the outer metal plate 12a is pressed (see FIG. 3b).

Next, the blow pipe 13 is attached to the metal plate 12a (see Fig. 3c), and the above-mentioned high-pressure fluid is injected into the area where the anti-crimping agent 12c is applied to swell it, thereby preventing the anti-crimping agent. Plastic member 1 corresponding to the position of the agent application part
A frame of the roller bond material 12 is made using 2c.

Therefore, the roller bond material 12 completed as described above
has a cross-sectional structure as shown in Figure 3d. by the way,
Fig. 3 shows an example in which two metal plates 12a and 12a are used, but as shown in Figs. Alternatively, a large number of metal plates 12a may be stacked on top of each other as shown in FIG. 5.

Therefore, using the roller bonding method as described above, FIG.
~ A lightweight structure as shown in Fig. 5 is made, but this lightweight structure may be used with high pressure fluid injected into the roller bond material 12, or by injecting high pressure fluid into the roller bond material 12. It can also be used in a state where it is permanently deformed and then the high-pressure fluid is removed to create a vacuum inside and also serve as insulation.

It is also possible to inject resin or oil instead of high-pressure fluid. Furthermore, a lightweight superconducting coil structure as shown in FIG. 2 requires secondary processing to flatten the outside as shown in FIG. 6, for example.

However, the secondary processing of this can be relatively easily carried out by putting it into a molded body and making it bulge out, or by changing the application interval of the anti-adhesive agent 12b, or by making the roller bond material 12 bulge out. A foamed synthetic resin heat insulating material or the like may be applied in advance for secondary processing. At this time, collapse @ may occur at the inner corner as shown in FIG. 6, but as described above, the corner has a strong resistance against external pressure, so good results are limited against external pressure.

In order to make it strong against external pressure, it is pre-hammered (launched).
It is also possible to bulge out after doing the above.

Note that in the above embodiment, the roller bonding method among pressure bonding methods was particularly explained, but the plastic member 12c may be crimped to the metal plate 12a using an explosive bonding method, a press bonding method, a friction saddle bonding method, etc. good.

In addition, although the above embodiment was applied to a superconducting coil,
It goes without saying that it can be used, for example, for the body walls and floors of floating vehicles, as well as for materials such as aircraft, artificial satellites, and spacecraft.

As detailed above, according to the present invention, a lightweight structure is produced by crimping a plastic part coated with an anti-crimping agent on a thin metal plate and bulging the non-crimped part coated with an anti-crimping agent. It is extremely lightweight and is ideal for use in, for example, floating vehicles.

In addition, conventional honeycomb structures are not suitable for mass production due to manufacturing man-hours and secondary processing, but this structure is easy to bend before and after expansion, and secondary processing can be easily performed. It is suitable for mass production, and can also contribute to cost reduction.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional lightweight structure, and Figure 2 is a superconducting coil for a levitation vehicle to which the lightweight structure of the present invention is applied. Figure 3c is a cross-sectional view after swelling; Figure 3c is an enlarged view of part ■ in Figure 3b; Figures 3a to 3c are manufacturing process diagrams using the roller bonding method; Figure 3d is A of Figure 3c. -A cross-sectional view, FIGS. 4a, b, and 5 are cross-sectional views of roller bond materials showing other examples. FIG. 6 is a partially cutaway cross-sectional view for explaining secondary processing. . 10... Stainless steel container, 11a, 11b...
...Superconducting coil, 12... Roller bond material, 12a... Metal plate, 12b... Anti-crimping agent (paint), 12c... Swelling Extrusion parts. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. A metal plate, a plastic member attached to the metal plate and coated with a type of anti-crimping agent such as carbon paint or ceramic powder paint in a predetermined shape, and the metal member and the crimping member. crimping means for pressing a plastic member coated with an anti-crimping agent using a pressure bonding method to crimping a portion other than the portion coated with the anti-crimping agent to the metal member, and compressing the non-crimped portion formed by this means. A lightweight structure characterized by being made into a structure with a predetermined frame structure by injecting and expanding a type of high-pressure fluid such as air, high-pressure gas, and high-pressure water, or a type of non-high-pressure fluid such as resin or oil. 2. The lightweight structure according to claim 1, wherein the fluid injection means injects high-pressure fluid to bulge and permanently deform the non-crimped portion, and then extracts the high-pressure fluid.