JPS62183923A - Production of honeycomb structure - Google Patents

Abstract

PURPOSE:To prevent the flaw, deformation, etc., of a product by arranging a core and two face plates via a friction reducing material between tthe base plate of a press device and pressure jig, then by performing the press-binding of the core and face plate. CONSTITUTION:A core 2 and two face plates 3 are arranged in honeycomb panel shape via a metal plate 11 by arranging a graphite coating metal plate 11 as the friction reducing material between the base plate 5 of a press-binding device and pressure jig 6. A honeycomb panel is then formed after cooling by performing a brazing treatment by heating with press-binding by forming a nitrogen gas atmosphere in this state. In this case the core 2 or face plate 3 under pressure-binding is expanded due to the heating and slided for the pressure binding device and this sliding is caused between the friction reducing material 11 and core 2 or face plate 3, or in the space with the pressure binding device. The flaw of a product and the generation of deformation can therefore be prevent due to no flaw nor deformation being caused on the sliding part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a honeycomb structure, and more particularly, to a method for manufacturing a honeycomb structure by integrating a core and a face plate.

[Prior Art] Conventionally, plates made of relatively soft metals, such as aluminum and its alloys, metal foils such as aluminum foil and iron foil, paper such as paperboard, resin-impregnated paper, and synthetic paper, polyethylene, polypropylene, etc. A honeycomb is created by laminating laminated materials consisting of plastic sheets, fixing the plates or materials to each other at regular intervals using brazing filler metal or adhesive, and stretching the thus constructed laminated body in the thickness direction. A honeycomb structure is known in which face plates are fixed to both edges of each material forming the core, that is, the front and back surfaces of the honeycomb core.

An example of such a honeycomb structure is shown in the perspective view of FIG. 3(A). The honeycomb structure 1 of this example includes a core 2 and a core 2.
It consists of a face plate 3 which covers both sides of and is fixed to. core 2
In this example, ribbon-shaped aluminum alloy plates 28 are laminated tightly at predetermined intervals and stretched in a direction perpendicular to the laminated surfaces to form a hexagonal tube assembly.

As illustrated in the partial front view of FIG. 3(B), the method for manufacturing the honeycomb structure 1 described above is such that the base plate of the pressing device is 5, and is pressed from above with a flat pressing jig 6 of a pressing device, and during this pressing, the brazing filler metal 4 is melted by heating, and then cooled by fJl. , done.

[Problems to be Solved by the Invention] However, the core 2, face plate 3, and brazing filler metal 4 have different coefficients of thermal expansion from those of the base plate 5 and pressing jig 6 of the clamping device.

For this reason, especially when a metal material such as aluminum is used for the core 2 and the face plate 3, the core 2 and the face plate 3 may be used with the base plate 5 or the pressing jig 6 of the clamping device due to the difference in thermal expansion due to temperature increase. As a result, the surface of the face plate 3 may be damaged, or the face plate 3 and the core 2 may be deformed due to frictional force, resulting in poor brazing. The larger the panel size and the thinner the panel, the more noticeable the defects were. For this reason, not only the yield was reduced, but also the commercial value was reduced. This problem also occurs when cooling while compressing.

Therefore, an object of the present invention is to provide a method for manufacturing a honeycomb structure that solves the above problems.

[Structure of the Invention] The structure of the present invention made to achieve the above object is as follows: The core and the face plate are arranged in a honeycomb structure with a fixing material disposed at the contact portion between the core and the face plate, and then The arranged cores and face plate are heated while being pressed by a pressing device, and then the pressing is stopped or the pressing is continued and cooled to solidify the above-mentioned fixing material at the contact portion and the core is heated. In the method of manufacturing a honeycomb structure, the clamping device clamps the core and the faceplate through a solid friction reducing material. The gist is the manufacturing method.

Here, the solid friction-reducing material is a plate-shaped body or a plurality of spheres arranged in a planar shape, and examples of the plate-shaped body include a graphite flat plate, both sides of a metal flat plate, or a honeycomb structure. Materials that come into contact include those coated with graphite and ceramic plates, which have a very low coefficient of friction μ even when they come into contact with other members. When manufacturing an aluminum honeycomb structure by IFJ, μ=0.5 or less is preferable in view of the finish of the honeycomb structure. Further, the thickness thereof is preferably 10 μm to 40 mm from the viewpoint of strength and heat conduction.

In addition, the spherical friction reducing material takes advantage of the fact that rolling friction is extremely small, and its diameter is 0.11 to 20.
11111 is preferable from the viewpoint of strength and heat conduction.

Furthermore, the surface roughness of both the plate-like bodies and the spheres is preferably in the range of 0.1 μ to 500 μ, in view of the surface finish of the honeycomb structure.

It is preferable to further apply graphite powder to the surface of both the plate-shaped friction reducing material and the spherical friction reducing material, as this will lead to further reduction in friction.

Further, the friction reducing material does not need to be present alone, and may be applied and fixed as a layer where the clamping device contacts the honeycomb structure. In this case, there is no need to pinch the abrasion material, improving workability.

When a sphere is used as a friction reducing material, if the sphere is made of ferromagnetic material and the clamping part of the clamping device is made of a permanent magnet or electromagnet, the work when arranging the sphere will be easier.
Even in continuous pressing and heating work, the trouble of arranging the spheres can be saved.

Of course, it is also possible to use a permanent magnet on the spherical side and a magnet or ferromagnetic material on the clamping device side.

The heat treatment during compaction may be performed by placing the compaction device itself in a heating furnace, or by attaching a heating device to the compaction device itself for heating.

[Function] The core and the face plate are arranged in a honeycomb structure, and a solid friction-reducing material is present between the pressing device and the core or the face plate during pressing and heating. The heating causes the core or face plate being pressed to expand and slide against the pressing device. This sliding occurs between the solid friction reducing material and the core or face plate, or between the solid friction reducing material and the clamping device. For this reason, unlike sliding motion with large friction, no damage is caused to the surrounding area.

Next, the present invention will be explained in detail. The present invention is not limited to the following examples, and includes various embodiments without departing from the gist.

[Example 1 The following is the actuality of the present invention III! An example will be explained based on the drawings.

FIG. 1 is a schematic diagram showing the pressing and heating step of the IFJ manufacturing method of the first embodiment. A graphite-coated metal plate (Bunny Height BP manufactured by Nippon Graphite Co., Ltd.
-4 diluted with alcohol, applied and dried to a thickness of 0.51
A core 2 and two face plates 3 are arranged in a honeycomb panel shape with a stainless steel plate (1Il) 11 in between.

The core 2 has already been formed into a honeycomb core with a cell size of 1 inch and 2 inches and a height of 27 mm using an aluminum plate (BA21PC) with a thickness of 0.25111111.

The face plate 3 is an aluminum plate having a thickness of 1.2 rom, and the core 2 side of each face plate 3 is coated with a brazing material at a cladding ratio of 10%.

Also, the entire panel is 1501111X 900ml large serrations.

The pieces arranged in this way were pressed and heated in a nitrogen gas atmosphere to perform a brazing process. Base plate 5 and pressure jig 6
At a pressure of 0, 1 k (1/c, nr), the heating speed was increased to 600'C at 10 °C/min. After this,
Continued pressing at 600℃ for 40 minutes, and after cooling FA to 80℃,
I took out the honeycomb panel.

Next, a second embodiment of the present invention will be described. FIG. 2 is a schematic diagram showing the pressing step of the manufacturing method of the second embodiment.

This embodiment differs from the first practical example in that ceramic balls 12 with a diameter of 5 mm are arranged instead of the graphite plate 11. Other materials and steps are exactly the same as in the first embodiment.

The results of each of the above embodiments will be compared with the results of a comparative example in which the graphite plate 11 was simply removed from the embodiment described above and the clamping process was otherwise the same.

The number of samples is n-10 in all cases.

(Comparison) In both the first example and the second example of the present invention, almost no scratches were found on the surface of the face plate 3, and no deformation of the panel was found. Moreover, the brazed parts were also in good condition overall.

On the other hand, in the comparative example, many scratches were found on the surface of the face plate 3, and the panel itself was deformed such as twisting.
Cracks and uneven areas were also discovered in the brazing.

As described above, in each of the examples, there are almost no occurrences of scratches, etc., and honeycomb panels of excellent quality can be manufactured at a high yield. In the comparative example, not only a large number of scratches were generated, but also the brazed portion was defective, and the strength was insufficient. The comparison of peel strength is as follows.

(Flatwise tensile strength) This example: 75kof/c resistance Comparative example; 32kgf/crI? As can be seen, there is a large difference in peel strength.

[Effects of the Invention] The method for manufacturing the honeycomb 4 structure of the present invention has the following advantages:
Even if the honeycomb structure slides against the clamping device due to thermal expansion, scratches on the surface, insufficient brazing, and deformation of the honeycomb structure itself can be prevented.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the pressing and heating process of the first embodiment of the present invention, Fig. 2 is an explanatory diagram showing the pressing and heating process of the second embodiment, and Fig. 3 (A) is an explanatory diagram showing the pressing and heating process of the second embodiment. A perspective view showing the structure of
(b) represents an explanatory diagram showing a conventional pressing and heating process. 1... Honeycomb panel (honeycomb structure) 2... Core 3... Face plate 4... Brazing material 5... Base plate 6... Pressure jig 11... Black tn plate 12... ·sphere

Claims (1)

[Claims] With a fixing material placed in the contact area between the core and the face plate,
By arranging the cores and face plates in a honeycomb structure, then heating the arranged cores and face plates while pressing them with a pressing device, then stopping the pressing or cooling them while keeping the pressed state. , in the method for manufacturing a honeycomb structure, in which the core and the face plate are fixed by solidifying the fixing material at the contact portion, the clamping device clamps the core and the face plate via a solid friction reducing material; A method for manufacturing a honeycomb structure characterized by: 2. The method for manufacturing a honeycomb structure according to claim 1, wherein the solid friction reducing material is a graphite flat plate. 3. The method for manufacturing a honeycomb structure according to claim 1, wherein the solid friction reducing material is a flat metal plate coated with graphite on both surfaces or on the surface that contacts the honeycomb structure. 4. The method for manufacturing a honeycomb structure according to claim 1, wherein the solid friction reducing material is a plurality of spheres arranged in a plane.