JPH05269898A - Honeycomb panel and production thereof - Google Patents

Abstract

PURPOSE:To provide a honeycomb panel simple to manufacture and having no defect in the welded part of a face sheet and a honeycomb core. CONSTITUTION:A large number of channel bars 1-1, 1-2 having outwardly inclined side surfaces and also having flanges 7-1, 7-2 provided to the end parts of the side surfaces are parallelly arranged between upper and lower face sheets 2a, 2b and a honeycomb core 3 is formed by welding and bonding the bottom surfaces 8 of the channel bars 1-1, 1-2 to the lower face sheet 2b and welding and bonding the flanges 7-1, 7-2 to the upper face sheet 2a to constitute a honeycomb panel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a honeycomb panel made of a metal plate such as stainless steel or titanium. These honeycomb panels are composed of a pair of upper and lower face sheets and a honeycomb core sandwiched between the face sheets. Usually the honeycomb core is corrugated and is fixed to the face sheet by adhesion or other means. The honeycomb panel having such a structure is extremely light and has excellent strength. This type of honeycomb panel is generally used in aircraft, ships, vehicles and the like.

[0002]

2. Description of the Related Art FIG. 3 is an explanatory view of a conventional honeycomb panel 11, (A) is an external view, and (B) is an assembly view of the honeycomb panel. The honeycomb panel 11 includes the honeycomb core 3 between the upper face sheet 2a and the lower face sheet 2b.
It is formed by sandwiching. The honeycomb core 3 is a corrugated plate obtained by subjecting one plate to a large number of grooves.

When assembling the honeycomb panel, the honeycomb core 3 is placed on the lower face sheet 2b, and the bottom surface of the honeycomb core 3 and the face sheet 2b are joined, for example, by welding. 4 is this bottom welding. Next, the upper face sheet 2a is placed, and the top surface of the honeycomb core 3 and the face sheet 2a are joined, for example, by welding. 5 is this top surface welding. However, in FIG. 3 (B), unlike the regular grooves 12 and 14 in the honeycomb core 3, θ is larger than the regular θ ₁ by θ ₂
When the groove 13 is formed, the top surface of 13 and the upper face sheet 2a do not adhere to each other, so that it is difficult to form the top surface joint 5 in the groove 13. The grooves 13 in which θ is θ ₂ are likely to occur at the time of groove processing and the positioning of the bottom surface weld 4 when manufacturing the honeycomb core. Therefore, welding defects are likely to occur in FIG. 3 (B).

FIG. 3C shows an example in which the face sheet 2a is pressed downward to perform top surface welding. However, in this case, the regular grooves 15 and 17 are pressed and deformed, and it is difficult for the top surfaces of the grooves and the upper face sheet 2a to come into contact with each other, so that the top surface joining of 15 and 17 becomes a welding defect. easy.

[0005]

As described above, in the conventional honeycomb panel, welding defects are likely to occur at the joining of the face sheet and the honeycomb core, so that a skilled person may use complicated welding positioning jigs and holding jigs. Although the face sheet and the honeycomb core are bonded by using them, the conventional method has a problem that the manufacturing process is complicated and the productivity is low.

An object of the present invention is to provide a honeycomb panel and a method for manufacturing the same, in which complicated welding positioning jigs and holding jigs are unnecessary at the time of assembly, and there is no defect in the bonding between the face sheet and the honeycomb core. There is.

[0007]

FIG. 1 is an explanatory view of a cross section of a honeycomb panel of the present invention. The honeycomb panel of the present invention has outer side inclined side surfaces 6-1 and 6-2 between the upper face sheet 2a and the lower face sheet 2b,
Flange 7-outwardly arranged on the upper ends of both sides
, 1-n having the same shape as the groove-shaped material 1-1 having 1 and 7-2 are arranged in parallel to form the honeycomb core 3, and each groove-shaped material is formed. 1-1, 1-2,
, 1-n has a bottom surface 8 joined to the lower face sheet 2b and both flanges 7-1 and 7-2 joined to the upper face sheet 2a.

That is, the honeycomb core 3 of the present invention is constructed by arranging the groove-shaped members 1-1, ..., 1-n for each cell, and each groove-shaped member 1-1, ..., 1-n is an upper face sheet. 2a and the lower face sheet 2b are joined.

FIG. 2 is an explanatory view of a method for assembling the honeycomb panel of the present invention, (A) is an explanatory view of applying bottom surface welding 4, (B).
FIG. 4 is an explanatory diagram in which an upper face sheet is arranged after performing bottom surface welding 4. In the present invention, the groove forming material 9-1 is used to form the groove forming material 1-1. Groove type material 9-1 has side surface 6
The internal angle α between −1 and the flange 7-1 is larger than the internal angle β between the side surface 6-1 and the bottom surface 8.

A large number of groove-forming materials 9 having the same shape as 9-1
-1, ..., 9-n are joined in parallel on the lower face sheet 2b. At this time, when an energy beam, for example, a laser beam is irradiated from above the groove-forming material 9-1 to perform welding to form the bottom surface weld 4, no welding marks are generated on the lower surface of the lower face sheet 2b, and the surface is kept beautiful. Be drunk

After the bottom surface welding 4 is completed, the upper face sheet 2
a is arranged, but by arranging the upper face sheet, the side surfaces 6-1 and 6-2 of the groove-forming material 9-1 are elastically deformed in the direction of the arrow 10 and the groove-forming material 1- of FIG. It becomes 1. The groove-shaped flanges 7-1 and 7-2 are brought into surface contact with the upper face sheet 2a by elastic reaction force. The top surface welding 5 is shown in FIG.
Although it is performed in the state of (B), the flanges 7-1 and 7-2 of the groove type material
Is always in surface contact with the upper face sheet 2a due to the elastic reaction force, so that even if the top surface welding 5 is performed from above the upper face sheet 2a, the top surface welding 5 has no defect.

Although an example of using the energy beam for the bottom surface welding 4 has been described, a honeycomb panel having no welding defects can be obtained even by electric resistance welding or the like. Further, the welding locations of the bottom surface welding 4 and the top surface welding 5 are two locations in the figure, but are determined to be one location, two locations, or three locations depending on the required strength of the honeycomb panel, As the welding form, seam welding or pulse welding may be determined.

[0013]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The embodiments described below are intended to explain the present invention in principle, and needless to say have no meaning to limit the invention.

The groove-forming material used in the examples is 9- in FIG. 2 (A).
As shown by 1, the stainless steel has a thickness of 300 μm, the height of the groove is 40 mm, and the bottom of the groove has a width of 5 mm. As the face sheet, a stainless steel plate having a thickness of 2 mm was used. As shown in FIG. 2 (A), this groove-forming material was arranged on a face sheet, and first, the face sheet on one side was joined using a laser beam.

The laser used was a continuous wave oscillation YAG laser often used in general welding, and a beam was transmitted to a laser welding head by an optical fiber to focus the joint portion. The processing conditions at this time were an output of 240 W and a processing speed of 1 m / min.

Further, as shown in FIG. 2 (B), the other face sheet is covered from above, and the contact portion between the core flange portion and the face sheet is welded from the upper face sheet 2a side with a laser beam without using a holding jig. .. The welding conditions at this time were a continuous wave YAG laser with an output of 1 kW and a welding speed of 1 m / min. There was no welding defect in such a honeycomb panel. Further, when a bending test was conducted, a strong honeycomb panel could be obtained without breaking the welded portion or the honeycomb panel.

[0017]

According to the present invention, it is possible to manufacture a honeycomb panel without welding defects with high productivity in a simplified manufacturing process. In the conventional honeycomb panel, since the honeycomb core is composed of a single corrugated sheet, a pressing jig is used to secure the adhesion between the honeycomb core and the face sheet when welding the honeycomb core and the face sheet. It is necessary to position the holding jig, which complicates the manufacturing process and causes a problem in productivity. Further, due to the molding state of the honeycomb core, the pressing jig cannot secure the close contact between the face sheet and the honeycomb core, and there is a high possibility that the welding between the honeycomb core and the face sheet will be defective.

However, according to the present invention, by simply placing the face sheet when welding the honeycomb core and the face sheet, the flange portion of the honeycomb core and the face sheet can be intimately contacted with each other, and a honeycomb jig can be used without using a pressing jig. It was possible to weld the face sheet without any welding defects.

[Brief description of drawings]

1 is an explanatory view of a cross section of a honeycomb panel of the present invention, FIG. 2 is an explanatory view of a method of assembling the honeycomb panel of the present invention, and FIG.
FIG. 4 is an explanatory view of a conventional honeycomb panel.

[Explanation of symbols]

1 (1-1, 1-2): Channel material, 2a: upper face sheet, 2b: lower face sheet, 3: honeycomb core,
4: Bottom welding, 5: Top welding, 6 (6-1, 6-
2): side surface, 7 (7-1, 7-2): flange, 8:
Bottom surface, 9 (9-1, 9-2): Groove material, 10: Direction of elastic deformation of side surface, 11: Honeycomb panel.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Ishibashi 4-1-36-201 Namiki, Sagamihara City, Kanagawa Prefecture

Claims (2)

[Claims] 1. A large number of groove-shaped members of the same shape having parallel outwardly inclined side surfaces and flanges outwardly arranged at the upper ends of both side surfaces are provided in parallel between the upper face sheet and the lower face sheet. A honeycomb panel characterized in that a honeycomb core is formed by arranging the honeycomb cores, a bottom surface of each channel material is bonded to a lower face sheet, and both flanges are bonded to an upper face sheet. 2. Between the upper face sheet and the lower face sheet, there are provided outwardly inclined side faces and flanges arranged outward at the upper ends of the side faces, and the inside angle between the side face and the flange is the side face. A plurality of groove-forming materials that are larger than the inner angle with the bottom surface are arranged in parallel, the bottom surface of each groove-forming material is joined to the lower face sheet, and both of the flanges are joined to the upper face sheet. Panel manufacturing method.