JPH02162187A - Hull structure and manufacture thereof - Google Patents

Abstract

PURPOSE:To make a hull lightweight and facilitate machining by providing rod insertion type male and female connecting pieces on both edges of a main body hollow section respectively and connecting molded materials filled with a honeycomb core in the main body hollow section to form the hull. CONSTITUTION:The center main body section of an aluminum shape material 1 is formed into a large hollow section 2, a male connecting piece 3 is formed on the left side section, and a female connecting piece 4 is formed on the right side section respectively. Semicircular rod striking plates are formed on middle upper and lower faces of the male connecting piece 3, and corresponding rod receiving plates are formed on inside upper and lower faces of the female connecting piece 4. A honeycomb core 9 is filled in the hollow section 2, and a face plate 10 is covered on it and fixed with thermosetting resin to form a honeycomb compound material S. This compound material S is bent or twisted to match with a hull. Two compound materials S are combined with male and female molds, a rod is inserted, a seam is welded, and they are stacked to form the hull. The hull is made lightweight and can be formed by easy machining with few welded sections.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a hull structure of a small vessel such as a pleasure boat, a sailing vessel, a fishing boat, or a high-speed boat, and a method for manufacturing the same. In particular, because the hull is constructed only from materials that have high strength, high rigidity, lightness, and unsinkability, and there is no rib structure,
The present invention relates to a ship hull structure and its manufacturing method that can reduce welding work.

[Conventional technology] The materials that make up the hulls of high-speed boats, fishing boats, etc. are wood, steel,
Aluminum alloy plate materials and fiber reinforced plastics (F
RP) is used.

In general, ship hulls must withstand all kinds of natural conditions underwater, so shell materials made of these various materials are reinforced with ribs and the like. The pitch of the ribs is generally 3
In the case of metal materials, welding requires a lot of man-hours and increases the weight of the hull, which is not desirable.

In order to reduce such harmful welding man-hours, a proposal was made to construct the hull using aluminum sections (Special Publications Show 11).
1-28549) has also been made.

[Problem to be solved by the invention] According to the conventional ship hull manufacturing method using various plate materials, ribs must be arranged finely on the inner surface, which consumes a lot of materials, labor costs, and energy. thing,
As a result, there are problems such as the hull becoming heavier.

In order to solve this problem, structures that mechanically join the sections have been proposed, but the bending strength, water pressure resistance, workability such as bending and twisting, and the strength of the joints are not necessarily sufficient. It is applied to straight parts such as the bottom and sides of ships, and in reality, many ship bodies are constructed using aluminum plates or FRP materials.

On the other hand, wood has been used for a long time as a material for small ships, and more recently aluminum plates and FRP materials have been used, but the reality is that a certain material for ships has not yet been established.

Recently, with the advent of an era of faster ships, there has been a demand for further improvement and development of materials for ships.

The material must be lightweight, highly rigid, float on water, easy to process, easy to assemble, and capable of strong bonding. In addition, there is a need for materials that have various properties, such as not corroding or deteriorating in seawater, being nonflammable, and being recyclable when ships are scrapped.

The present invention satisfies these issues and provides a hull that is composed of members that have high strength, high rigidity, light weight, and unsinkability, and that can reduce welding work because no rib structure is provided. The structure and its manufacturing method are provided.

[Means for Solving the Problems] A first aspect of the present invention includes a male connector and a female connector each having a rod insertion type on both edges of the hollow main body, and a honeycomb core in the hollow main body. A hull structure characterized by being formed by mutually arranging honeycomb composites made of shapes or molded materials filled with A honeycomb composite is constituted by a shaped material or molded material comprising a male connector and a female connector, and a 71 nicham core is loaded into the hollow part of the main body, and is bent, twisted, or subjected to plastic processing in advance. By doing so, they are combined according to the shape of the ship, and adjacent two-comb complexes are connected by fitting their male connector and female connector, and a connecting rod is inserted into the connecting part. This method of manufacturing a ship hull is characterized by reinforcing it and then welding the surface of the joint of the unicum composite.

In the present invention, the hull is made by combining long honeycomb composites instead of wood, similar to the conventional construction method of combining wood, so many joining lines between members occur in the longitudinal direction. Therefore, the method of connecting the parts to each other is important, and for this purpose we discovered a method of connecting the mouth and the mouth, and were able to increase the adhesive force.

This connecting part is loaded with a honeycomb core (7) and has a higher knotting force than the At part, and has the property of also sharing the knotting of the ribs.

The plate portion only needs to be thick enough to be composited with a honeycomb core, to withstand water pressure, and to withstand denting due to impact. Therefore, the thickness of the plate part can be kept within 1 to 4 m.

For bending and swinging, the honeycomb core is preferably made of aluminum, preferably a thin honeycomb made of aluminum foil.

Since the face plate covering the honeycomb core does not need to act as a strength member, it can be made thinner than the plate portion of the profile.

[Example] Examples will be described based on the drawings.

FIG. 1 shows a cross section of an aluminum profile l produced by extrusion. This device has a large hollow portion 2 in the central main body, a male connector 3 on the left side, and a female connector 4 on the right side. Rod seats 5.5 are provided on the middle upper and lower surfaces of the male connector 3, and corresponding rod seats 6.6 are also provided on the inner upper and lower surfaces of the female connector 4.

Further, on both sides of the upper part of the hollow part 2, there are seats 7 and 8 for face plates, which will be described later.
is the provision.

As shown in FIGS. 2 and 3, a honeycomb core 9 made of an aluminum material is loaded into the hollow part 2 of such an aluminum profile l by applying a thermosetting resin on the top and bottom of the honeycomb core in the height direction, and then As shown in FIG. 4, the face plate 10 is passed over the face plate seat 7.8, and the face plate 10 is bonded by heating and pressure to form a unit honeycomb composite body S.

As shown in FIG. 5, the honeycomb composite S constructed in this way is constructed by fitting the male connector 3 of one honeycomb composite S to the female connector 4 of the adjacent honeycomb composite S by butting them together. , the connecting rod 11 is inserted into the two circular cross-sectional portions formed by the rod seats 5.6 and reinforced. Then, the welded portion 12 is formed by welding the surface groove portions of the butt joints of the honeycomb composites s, s. This welding part 12 is not intended to provide joint strength, but its main purpose is to fix the water seal and the female connector 4 of the joint part so that they do not spread in the thickness direction. Therefore, the strength of the joint portion is borne by the connecting rod 11.

Prior to joining each honeycomb composite S, each honeycomb composite S is subjected to bending, twisting, or other processing depending on the form of the hull at the location where the female connector S is used. Alternatively, without performing this processing, the aluminum molded material itself may be plastically processed in advance to form a certain shape.

The honeycomb composite S formed in this manner has much better bendability than a hollow material in which the honeycomb core 9 is not inserted. That is, as shown in FIG.
A load P was applied to the center of the test material T of 00 m5, and the residual deflection was measured using a dial gauge G. The results are shown in FIG.

The honeycomb composite according to the present invention has a residual deflection of 200 m5
Hollow material can be bent up to 30mm.
It cannot be bent because it buckles. The present invention allows processing with a large residual deflection due to this bending workability.

In short, the honeycomb composite according to the present invention has almost the same bending workability and twisting workability as wood, which is necessary for constructing a ship's hull, and the ship's hull can be built in a stacked manner like wood.

To explain the specific method of manufacturing the hull based on Fig. 8, first, the overall shape of the ship is designed, and then each member a-1
・・・・・・e-1 is designed, and then each member is manufactured by extrusion processing or plastic processing, and depending on the part used, each part is bent, twisted, etc., and then stacked and attached to each adjacent part. The female connector and male connector of the member are butted against each other and fitted together, and as described above, a connecting rod is inserted through the connecting portion to reinforce it. The connecting portion is then welded to form a welded portion 12. Also, connecting parts between each member in the vertical direction of the drawing, for example, d-1 and c-1, d-1 and a
-1 etc. joint part W is also welded.

Note that parts with special shapes such as bows and handrails require the use of special attachments, but their specific configurations are not the gist of the present invention and will not be particularly described.

Next, the assembled hull is fitted into a ship shape and heat treated to remove stress.

[Effect of the invention] The hull structure of the present invention has the following effects.

■ The weight of the hull is 50 to 70% that of an aluminum ship,
It can be 40-60% lighter than FRP ships.

■ The water pressure that the hull receives locally is around lokgf/c+# ■ The honeycomb absorbs the vibrational impact of waves, preventing vibration of the hull.

■ It is common to use rib lining to reinforce the outer shell of a ship, but the use of honeycomb composites eliminates the need for a rib structure.

■ Since air is sealed within the honeycomb core, the specific gravity of the honeycomb composite is approximately 0.5, making it possible to design it to be unsinkable.

■ Materials can be recycled without pollution. or,
The effects of the manufacturing method include the following.

■ The manufacturing process can be shortened because most of the hull manufacturing is completed from component design to manufacturing and processing of the honeycomb composite.

■ The number of welding steps is extremely small compared to conventional metal hulls, so work efficiency is high, and strain relief work is also reduced, making it highly economical.

■ Honeycomb composites are suitable for mass production, making it possible to mass produce ship hulls.

[Phase] No skill in work H is required for construction.

■ The hull structure has good dimensional accuracy because it uses shaped materials.

@Due to the assembly structure, disassembly is easy, and modification such as changing dimensions is possible.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view in the width direction of a section or molded material that forms the basis of the structure of the present invention, Fig. 2 is a sectional view of the section or molded material shown in Fig. 1 loaded with a honeycomb core, and Fig. 3 is a cross-sectional view of the section or molded material shown in Fig. 1 loaded with a honeycomb core. Partial plan view of Figure 2, TS4 diagram or cross-sectional view of the honeycomb composite, Figure 5 is a cross-sectional view of the joint between honeycomb composites, Figure 6 is an explanatory diagram of the bendability test, Figure 7 is the bendability Graph showing test results,
FIG. 8 shows explanatory diagrams of the hull manufacturing method. l...Aluminum profile 2...Hollow part 3...Male connector 4...Female connector 5.6...Rod catch 7, 8...Beat 9... honeycomb core
IO... Face plate 11... Connecting rod

Claims (2)

[Claims] (1) A honeycomb composite made of a shaped material or a molded material, which is equipped with a rod-inserted male connector and a female connector on both edges of the hollow main body, and a honeycomb core is loaded into the hollow main body. A hull structure characterized by being formed by interconnecting two. (2) A honeycomb composite is constituted by a shaped material or a molded material having a male connector and a female connector of a rod insertion type on each of both edges, and a honeycomb core is loaded into the hollow part of the main body, The honeycomb composites are combined to suit the shape of the ship by bending, twisting, or prior plastic processing, and adjacent honeycomb composites are connected by fitting their male connectors and female connectors, A method of manufacturing a ship hull, comprising reinforcing the connecting portion by inserting a connecting rod thereinto, and then welding the surface of the joint of the honeycomb composite.