JPH11207423A - Joined honeycomb material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joined honeycomb material capable of preventing the stress concentration, improving the strength of a joined part, and reducing the deformation as a strength member to reduce the weight of a structure. SOLUTION: A joined honeycomb material comprises two butt-welded honeycomb materials, a plate 1-6 which is inserted in a recessed space formed in a honeycomb core 1-3 at a butt part of a honeycomb material 1, and stretched between upper and lower flanges 1-1, 1-2, and whose surface is projected from the flange ends, is butted to a plate 2-6 which is provided similar to the honeycomb material 1 at the butt part of a honeycomb material 2, the flanges 1-1, 1-2 are fillet-welded to upper and lower ends of the plate 1-6, flanges 2-1, 2-2 are fillet-welded respectively to upper and lower ends of the plate 2-6, and the plates 1-6, 2-6 are butt-welded to each other at upper and lower ends.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joined honeycomb material used for an outer plate of a heat insulating container or the like for accommodating a superconducting magnet.

[0002]

2. Description of the Related Art A cryostat for a superconducting magnet or a vessel for evacuating the inside for heat insulation of a cryogenic apparatus, that is, a vacuum vessel is generally used. Among them, some large-sized vacuum vessels and the like mounted on a moving body such as a magnetic levitation train use a honeycomb material for weight reduction. For example, the cryostat described in Japanese Utility Model Application Publication No. 47-21779 shows an example using a honeycomb material. In this known example, there is no description about the joining portion of the honeycomb material. However, when this kind of large container is formed, a portion for joining the honeycomb material to another member or the honeycomb material by welding or the like is required.

[0003]

Problems to be solved when connecting honeycomb materials are described below. As shown in FIG. 8, the honeycomb material 1 has two upper and lower plate-like flanges 1-1 and 1--1.
2 and honeycomb core 1 between the two flanges
-3 cores. Two honeycomb materials 1,
When two are joined together, as shown in FIG.
The flanges are joined together, that is, the upper flange 1-1
And the upper flange 2-1 and the lower flange 1-2.
And the lower flange 2-2, and these butt portions are usually joined by welding or the like. Ideally, we also want to connect the honeycomb cores 1-3 and 2-3,
Honeycomb cores 1-3, 2 at the butted surfaces of honeycomb materials 1, 2
(3) In general, the honeycomb cores cannot be connected to each other because the positions of the constituent members do not match.

[0004] At the joint portion of the honeycomb material where only the flange is welded, when the shear force F is to be transmitted, only the flange is connected and the position of the honeycomb portion is shifted. A flow of force occurs. That is, the power is concentrated only at the place where the honeycomb is located. Therefore, the shear stress increases. Further, when the position of the honeycomb is shifted (distance x), the shear deformation during this time increases. For this reason, conventionally, a honeycomb material is used only for a part of the vacuum container, and a thick member is used at a key point to secure the strength, and the weight cannot be reduced sufficiently.

An object of the present invention is to obtain a joined honeycomb material which improves the strength of a joint and reduces deformation.

[0006]

In order to achieve the above object, a first jointed honeycomb material of the present invention is formed by joining a plurality of honeycomb materials and joining them together. The flat plates which are inserted into the concave space formed in the honeycomb core at the butting portion and pass between the upper and lower flanges and whose surfaces protrude from the flange ends are butted against each other, and at the upper and lower ends of each honeycomb material, the flat plate and the honeycomb material are respectively formed. It is characterized in that the flanges are welded and the flat plates of both honeycomb members are welded to each other.

Further, in the second joined honeycomb material of the present invention, one flat plate is used instead of the two flat plates in the first joined honeycomb material, and the flat plate and a flange of each honeycomb material are combined. Each is formed by welding at the upper and lower ends of a flat plate.

[0008] A third jointed honeycomb material of the present invention is a flat plate which is formed by abutting a plurality of honeycomb materials, inserted into a concave space formed in each honeycomb core, and passing between both upper and lower flanges of both honeycomb materials. And the butted portion of the flange of each honeycomb material are welded from above and below by electron beam welding or laser beam welding, respectively.

Further, the fourth joined honeycomb material of the present invention is composed of one honeycomb material consisting of upper and lower flanges of a thin plate and a honeycomb core, and a lower portion of a thick plate having the same total thickness as this one honeycomb material. The other honeycomb material consisting of a flange and a honeycomb core is butt-joined, and the two honeycomb materials are butt-joined and inserted into a concave space formed in each honeycomb core, so that the upper and lower flanges of both honeycomb materials are together. The stepped flat plate and the butted portion of the thin plate flange and the thick plate flange are welded from above and below by electron beam welding or laser beam welding, respectively.

The fifth jointed honeycomb material of the present invention is a flat plate formed by abutting a plurality of honeycomb materials, inserting into a concave space formed in each honeycomb core, and passing both upper and lower flanges of both honeycomb materials. The upper and lower end surfaces, the inner surfaces of the upper and lower flanges of each honeycomb material, and the upper and lower butting surfaces of the flanges of each honeycomb material are bonded to each other.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a joined honeycomb material according to an embodiment of the present invention. FIG. 1 is a sectional view showing a configuration of a joined honeycomb material according to a first embodiment of the present invention, and FIG. 2 is a plan view of the joined honeycomb material.

The joined honeycomb material according to the first embodiment is obtained by joining honeycomb materials 1 and 2 of the same size. The honeycomb material 1 is a flat plate 1-5 having a space formed between the upper and lower flanges 1-1 and 1-2 in a concave space formed in the honeycomb core 1-3 along the abutting portion and having a surface protruding from the flange end. Is inserted. The honeycomb material 2 is configured similarly to the honeycomb material 1. In the joined honeycomb material of the present embodiment, each of the honeycomb materials 1 and 2 is butted on the surface of the flat plate 1-5 and the flat plate 2-5, and the upper end of the flat plate 1-5 and the upper flange 1-1 on the honeycomb material 1 side.
And the lower end of the flat plate 1-5 and the lower flange 1-2 are welded to each other, and the upper end of the flat plate 2-5 and the upper flange 2-1 and the lower end of the flat plate 2-5 and the lower flange 2- 2
Are welded by fillet welding, and flat plates 1-5 and 2-5 are butt-welded at upper and lower ends.

The production of the joined honeycomb material is performed in the following procedure. The butt joint portion of the honeycomb material 1 is processed into a flat surface, and the constituent members of the honeycomb core 1-3 are cut so as to be slightly retracted from the processing surface.
A concave space is formed between -1 and 1-2. The flat plate 1-6 is fitted so as to pass the upper and lower flanges into this concave space, and the flat plate 1
The surface of −6 protrudes from the processing surface. Next, flange 1
1 and the upper end of the flat plate 1-6, and the flange 1-2 and the flat plate 1-
6 are welded so as to connect the respective lower ends. Similarly,
The mating honeycomb material 2 to be joined to the honeycomb material 1 is also subjected to surface processing and cutting, and the flat plate 2-6 is welded. In this way, the honeycomb materials 1 and 2 having the flat plates welded in advance are
The surfaces of the flat plates 1-6 and 2-6 are joined, and the ends of the flat plates are joined by welding.

When a honeycomb material is formed with a butt joint having the above structure, when the joined honeycomb material receives a shear force, the shear force is transmitted to the other through the flat plates 1-6 and 2-6. Therefore, the concentration of force as shown in FIG. 10 can be prevented, the shearing force can be reduced, and the amount of deformation of the entire honeycomb material can be reduced. It is important that the gap 5 formed between the honeycomb core 1-3 (2-3) and the flat plate 1-6 (2-6) be as small as possible. growing.

FIG. 3 shows a second embodiment of the present invention.
In the first embodiment, a flat plate is welded in advance to each of the honeycomb materials to be joined. However, the joined honeycomb material of the second embodiment is a single flat plate so that both the honeycomb materials 1 and 2 share the same flat plate. 7 is arranged at the joint portion, and as shown in FIG.
-1 are fillet-welded, and the lower end of the flat plate 7 is formed by fillet-welding the flange 1-2 and the flange 2-2, respectively. If integrated with such a structure, there is an advantage that members can be omitted. The planar processing of the butt joint portion of the honeycomb material and the cutting of the honeycomb core are performed in the same manner as in the first embodiment. The same applies to the following embodiments.

FIG. 4 shows a third embodiment of the present invention.
In the second embodiment, the flange and the flat plate are welded by fillet welding. However, as shown in FIG. 4, the joined honeycomb material of the third embodiment has a structure joined by electron beam welding. did. That is, the two honeycomb materials 1 and 2 to be joined are at the respective ends of the flat plate 7 disposed between the two honeycombs, and the end faces of the upper flanges 1-1 and 2-1 and the lower flanges 1-2 and 2 at both ends of the honeycomb materials. -2 are butted together, and the butted portion and the portion of the end face of the flat plate 7 in contact with the butted portion are joined together by electron beam welding.

When such a joint structure is used, the two flanges and one end of the flat plate can be welded on the upper and lower surfaces of the flange material in one pass, so that there is an advantage that the manufacturing process can be shortened. The same welding can be performed by using laser beam welding instead of electron beam welding.

FIG. 5 shows a fourth embodiment of the present invention.
In the third embodiment, the welding area between the flanges is equal to the thickness of the flange, but the welding area between the flange and the flat plate 5 is the welding bead width b of electron beam welding (see FIG. 4). It is determined. Generally, the beat width of electron beam welding is very narrow, and in some cases, the amount of welding may be insufficient with respect to the required sectional area for strength.

In this case, as shown in FIG. 5, by providing a stepped flat plate 8 at the joint portion of two kinds of honeycomb materials having different flange thicknesses, it is possible to secure a necessary welding amount. That is, the joined honeycomb material of the present embodiment is provided between the flanges 1-1 and 1-2 of the honeycomb material 1 at a butt joint portion of the honeycomb material 1 having a small flange thickness and the honeycomb material 3 having a large flange thickness. And one stepped flat plate 8 composed of a step portion passing between the flanges 3-1 and 3-2 of the honeycomb material 3, and two flanges are respectively formed on the upper and lower surfaces of the honeycomb material by electron beam welding. And a stepped flat plate are welded in one pass.

By adopting the joining structure using the stepped flat plate as described above, the thickness of the substrate portion of the stepped flat plate 8 (thickness that enters the honeycomb material 1) contributes to the strength of the joined portion. This has the advantage that the strength of the joint can be increased.

FIG. 6 shows a fifth embodiment of the present invention.
Although the first to fourth embodiments show examples in which a flat plate is welded to a honeycomb material, a small container or the like may not require much strength. In this case, the honeycomb members 1 and 2 may be joints as shown in FIG. 4, and the flanges may be joined to each other and each flange and the flat plate may be joined with an adhesive as shown in FIG. In this case, there is an advantage that the production can be simplified.

Although the above-described embodiment is based on a honeycomb core having a honeycomb shape, that is, a hexagonal core, the present invention is applicable to a case where the shape of the honeycomb core is not hexagonal.
The same applies. An example of a honeycomb material having a shape other than a hexagon is shown. 11 shows a triangular honeycomb core, FIG. 12 shows a quadrangular honeycomb core, FIG. 13 shows a unidirectional honeycomb core, and FIG. 14 shows a unidirectional honeycomb core having an angle with respect to the upper and lower flanges. Among them, the unidirectional honeycomb core material shown in FIGS. 13 and 14 has a structure suitable for mass production of long objects.

[0023]

FIG. 7 schematically shows a vacuum vessel mounted on a magnetic levitation train employing the joined honeycomb material of the present invention as a part of an outer wall. In this case, the joined honeycomb material is used as a strength member that receives a magnetic force during magnetic levitation.

[0024]

As described above, according to the present invention, since the joined honeycomb member is formed by inserting a flat plate into the joint portion between the honeycomb members and integrally joining with the flange, the stress at the joint portion is reduced. It can reduce concentration and reduce shear deformation. Therefore, by employing such a joined honeycomb material for a container, for example, a vacuum container, a lightweight vacuum container can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a joined honeycomb material according to a first embodiment of the present invention.

FIG. 2 is a plan view of the joined honeycomb material according to the first embodiment.

FIG. 3 is a sectional view showing a second embodiment of the present invention.

FIG. 4 is a sectional view showing a third embodiment of the present invention.

FIG. 5 is a sectional view showing a fourth embodiment of the present invention.

FIG. 6 is a sectional view showing a fifth embodiment of the present invention.

FIG. 7 is a view showing a container using the joined honeycomb material of the present invention.

FIG. 8 is an external view showing a honeycomb material.

FIG. 9 is a cross-sectional view showing a conventional joined honeycomb material.

FIG. 10 is a diagram illustrating the flow of shearing force in a conventional joined honeycomb material.

FIG. 11 is a diagram showing a honeycomb material having a triangular honeycomb core.

FIG. 12 is a diagram showing a honeycomb material having a quadrangular honeycomb core.

FIG. 13 is a view showing a honeycomb material having a honeycomb core in one direction.

FIG. 14 is a diagram showing a honeycomb material having a honeycomb core which is inclined in one direction and with respect to upper and lower flanges.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Honeycomb material 1-1, 1-2 Flange 1-3 Honeycomb core 2 Honeycomb material 2-1, 2-2 Honeycomb material flange 2-3 Honeycomb core 3 Honeycomb material 3-1, 3-2 Honeycomb material flange 3-3 Honeycomb core 5 Clearance between honeycomb core and flat plate 6 Flat plate 7 Flat plate 8 Flat plate with steps

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI // B23K 101: 02 (72) Inventor Motoaki Terai 1-4-1 Meieki Station, Nakamura-ku, Nagoya-shi, Aichi Tokai Railway Company In company

Claims (6)

[Claims] 1. A spliced honeycomb material comprising a plurality of honeycomb members comprising upper and lower plate-like flanges and a honeycomb-shaped honeycomb core sandwiched between these flanges, and joined by butt-joining. The flat plates inserted into the concave space formed between the upper and lower flanges and having the surface protruding from the flange ends are abutted with each other, and the flat plate and the flange of the honeycomb material are welded at the upper and lower ends of each honeycomb material, respectively. A joined honeycomb material characterized by being formed by welding flat plates of honeycomb material. 2. In a joined honeycomb material in which a plurality of honeycomb members formed of upper and lower plate-like flanges and a honeycomb-shaped honeycomb core sandwiched between these flanges are butt-joined to each other, both honeycomb members are butt-joined. A joint characterized in that a flat plate that is inserted into a concave space formed in the core and passes between the upper and lower flanges of both honeycomb members and flanges of each honeycomb member are welded at upper and lower ends of the flat plate, respectively. Combined honeycomb material. 3. A joined honeycomb material in which a plurality of honeycomb members made of upper and lower plate-like flanges and a honeycomb-shaped honeycomb core sandwiched between these flanges are joined by butt, and the two honeycomb materials are joined to each other. A flat plate that is inserted into the concave space formed in the core and passes between the upper and lower flanges of both honeycomb materials, and a butt portion of the flanges of each honeycomb material are welded from above and below by electron beam welding or laser beam welding, respectively. A joined honeycomb material characterized by being made. 4. A one-piece honeycomb material comprising a thin plate upper and lower flange and a honeycomb-shaped honeycomb core sandwiched between the flanges, and a thick plate upper and lower flange having the same total thickness as the one honeycomb material. And a joined honeycomb material joined by butt-joining the other honeycomb material formed of a honeycomb-shaped honeycomb core sandwiched between both flanges,
Abutting both honeycomb materials, a stepped flat plate which is inserted into the concave space formed in each honeycomb core and passes between the upper and lower flanges of both honeycomb materials, a butt portion of a thin plate flange and a thick plate flange, Characterized by being welded from above and below by electron beam welding or laser beam welding, respectively. 5. A joined honeycomb material in which a plurality of honeycomb members made of upper and lower plate-shaped flanges and a honeycomb-shaped honeycomb core sandwiched between these flanges are joined by butt, and the two honeycomb materials are joined to each other. The upper and lower end surfaces of the flat plate inserted into the concave space formed in the core and passing between the upper and lower flanges of both honeycomb materials, the inner surfaces of the upper and lower flanges of each honeycomb material, and the upper and lower abutting surfaces of the flanges of each honeycomb material are bonded to each other. A joined honeycomb material characterized by comprising. 6. A container using the joined honeycomb material according to claim 1 as an outer plate.