JPH1199577A - Manufacture of honeycomb panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain easily an alignment accuracy in the joint part of a honeycomb core part and a face sheet part by expansion molding a plurality of sheets of plane boards while applying pressure therebetween, and drawing out a honeycomb core material by taking a Joint part with the face sheet as a fulcrum in the molding process. SOLUTION: A honeycomb core material 1 is superimposed on a face sheet material 1 consisting of a hypoxia steel plate respectively. and both the ends and central line of the honeycomb core material 2 are welded by the use of carbonic laser 3. After that, a face sheet material 5 is superimposed thereon, and then the both the ends of the face sheet materials 1,5 and the face sheet material and honeycomb core material 2 are joined at the central line of a joint line. Then, hydraulic pressure is applied between two sheets of the face sheet materials 1, 5 to thereby be expanded for manufacturing a honeycomb panel. The face sheet material and honeycomb core material are joined horizontally, so that the alignment surface of the joint part is abutted with sufficient accuracy at all times.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a honeycomb panel, and more specifically, to a method for manufacturing a honeycomb panel including a trapezoidal honeycomb core and two face sheets sandwiching the honeycomb core.

[0002]

2. Description of the Related Art Hitherto, a honeycomb panel comprising a trapezoidal honeycomb core and two face sheets sandwiching the honeycomb core has been manufactured, for example, in Japanese Patent Application Nos. Hei 5-185258 and No. Hei 5-185258.
As disclosed in JP-A-277597, etc., it is usual that the honeycomb core portion and the face sheet portion are separately manufactured, and then manufactured through a process of joining them.

FIG. 3 shows a conventional method for manufacturing a honeycomb panel. In the drawings, reference numeral 1 denotes a face sheet, 2 denotes a honeycomb core, 3 denotes a laser beam, and 4 denotes a weld bead.

[0004]

However, in such a conventional method for manufacturing a honeycomb core, there is a problem that it is difficult to ensure the alignment accuracy between the three-dimensionally formed honeycomb core portion and the joining surface of the face sheet. there were.

[0005] Specifically, if a gap of 0.5 times or more the thickness of the honeycomb core material exists between the honeycomb core and the face sheet, the bonding strength is lower than that of the base material, and the honeycomb panel is not sufficient for the honeycomb panel. The strength was no longer available. It is extremely difficult to form the honeycomb core portion with a dimensional accuracy of less than 0.5 times the plate thickness, and it is extremely difficult to adhere to the face sheet portion with that accuracy, so that the accuracy can be easily obtained and a high-quality honeycomb panel can be manufactured. A way was desired.

The present invention has been made in view of such a conventional problem. In a method for manufacturing a honeycomb panel including a trapezoidal honeycomb core and two face sheets sandwiching the same, the honeycomb core portion is formed by a honeycomb core portion. An object of the present invention is to provide a method for manufacturing a honeycomb panel having a high-quality joint portion, which can easily obtain the alignment accuracy of the joint portion of the face sheet portion.

[0007]

According to the first aspect of the present invention, a honeycomb core material and a face sheet material are previously joined in a flat plate state. Then, pressure is applied between the two flat plates to expand and form the honeycomb core, and in the forming process, the honeycomb core material is stretched with the joint portion with the face sheet portion as a fulcrum to form the honeycomb core.

[0008] In a second aspect of the present invention,
As a joining method, welding with a small distortion using a laser beam was performed.

Further, according to the third aspect of the present invention, the value obtained by multiplying the yield strength of the honeycomb core material by the plate thickness is defined as:
The material was selected so as to be smaller than the value obtained by multiplying the yield strength of the face sheet material by the plate thickness.

The operation of the present invention will be described below. According to the first aspect of the invention, since the honeycomb core and the face sheet are joined in a flat plate state, the gap between the plates can be easily suppressed to a sufficient welding strength, and a high-quality honeycomb can be obtained. You can get a panel.

According to the second aspect of the present invention, by using laser welding, welding with less distortion can be performed, and a honeycomb panel having excellent smoothness can be manufactured.

Further, according to the third aspect of the present invention, the material is selected such that the value obtained by multiplying the yield strength of the honeycomb core material by the plate thickness is smaller than the value obtained by multiplying the yield strength of the face sheet material by the plate thickness. Thereby, the deformation of the composition of the face sheet material can be minimized, and a honeycomb panel having excellent smoothness can be manufactured.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a method for manufacturing a honeycomb panel according to the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

FIG. 1 is a view showing a configuration of an embodiment of a method for manufacturing a honeycomb panel according to the present invention. First, the configuration will be described with reference to FIG. 270M with 2.0mm thickness
A honeycomb core material 2 made of a 270 MPa grade low carbon steel sheet having a thickness of 1.2 mm is superimposed on a face sheet material 1 made of a Pa class low carbon steel sheet (FIG. 1A), and both ends of the honeycomb core material 2 And its center line using a carbon dioxide laser 3 with an output of 4.0 kW and a welding speed of 3.
Welding was performed at 0 m / min (FIG. 1 (b)).

Thereafter, a face sheet material 5 made of a 270 MPa class low carbon steel sheet having a thickness of 2.0 mm is overlapped (FIG. 1C), and both end portions of the face sheet materials 1 and 5 and the face sheet material 5 and the honeycomb core are combined. The material 2 was joined at the center line of the already joined joint line (FIG. 1).
(D)).

Thereafter, a honeycomb panel was manufactured by applying a water pressure between the two face sheet materials 1 and 5 in a mold (not shown) and performing expansion molding (FIG. 1).
(E), (f)).

As shown in FIG. 2, in the manufacturing method of the present invention, since the face sheet material and the honeycomb core material are joined in a flat plate state, the joining surfaces of the joining portions must always be joined with sufficient accuracy. It was possible and the joint did not fall below the base metal strength. FIG. 2 (a) is the same as FIG. 1 (d).
2B is an enlarged view of a portion A, and FIG. 2B is an enlarged view of a portion B of FIG.

[0018]

As described above in detail, according to the first aspect, since the honeycomb core portion is joined to the face sheet portion in a flat state, the joining portion between the honeycomb core portion and the face sheet portion is provided. Therefore, it is possible to easily obtain the alignment accuracy of the honeycomb panel, and as a result, it is possible to manufacture a honeycomb panel having a high-quality joint.

According to the second aspect of the present invention, since a laser beam is used in the joining, the joining can be performed without giving harmful distortion to the honeycomb core material and the face sheet material, and the strength and the smoothness are excellent. Honeycomb panels can be manufactured.

Further, according to the third aspect, the value obtained by multiplying the yield strength of the honeycomb core material by the thickness is smaller than the value obtained by multiplying the yield strength of the face sheet material by the thickness. The composition deformation of the material can be minimized, and a honeycomb panel having excellent smoothness can be manufactured.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing one embodiment of a method for manufacturing a honeycomb panel according to the present invention.

FIG. 2 is an enlarged view of a joint according to the embodiment.

FIG. 3 is an explanatory view showing a method for manufacturing a honeycomb panel according to a conventional technique.

[Explanation of symbols]

 Reference Signs List 1 face sheet 2 honeycomb core 3 laser beam 4 welding bead

Continued on the front page (51) Int.Cl. ⁶ Identification code FI // B23K 101: 02

Claims (3)

[Claims] 1. A method for manufacturing a honeycomb panel comprising a trapezoidal honeycomb core and two face sheets sandwiching the honeycomb core, wherein the honeycomb core material and the face sheet material are preliminarily joined in a flat state, and A method for manufacturing a honeycomb panel, comprising forming a honeycomb panel by applying pressure between flat plates to expand and form the honeycomb panel. 2. The method for manufacturing a honeycomb panel according to claim 1, wherein a laser beam is used in joining the honeycomb core material and the face sheet material. 3. The method for manufacturing a honeycomb panel according to claim 1, wherein a value obtained by multiplying a yield strength and a plate thickness of the honeycomb core material is:
A method of manufacturing a honeycomb panel, wherein the value is smaller than a value obtained by multiplying the yield strength of the face sheet material by a plate thickness.