JPH11348155A - Insert fitting method to honeycomb sandwich panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a honeycomb sandwich panel with inserts which can easily maintain high-precision arranging pitch between inserts and flatness between each insert, even when a large number of inserts are fitted. SOLUTION: In a method for fitting inserts to a honeycomb sandwich panel used for a structure such as an artificial satellite or the like, insert-fitting holes 11A are formed on a honeycomb core 11 before it is covered with skins 13 and 14. After the forming of the insert-fitting holes 11A, the skins 13 and 14 are adhered to both surfaces of the honeycomb core 11 by an adhesive 12. Insert-mounting holes are bored in the skin 13 on the side wherein inserts 20 are to be fitted. The inserts 20 inserted from the insert-mounting holes into the insert-fitting holes 11A are suspended and supported by a jig provided so as to be flush with the insert-mounting holes, and a filler S poured into the insert-fitting holes 11A are cured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching an insert to a honeycomb sandwich panel used as a structure of an aircraft or a satellite.

[0002]

2. Description of the Related Art As a member used as a structure of an artificial satellite orbiting the earth orbit, there is a honeycomb panel in which an aluminum core is adhered to an aluminum core.
This honeycomb panel is lightweight, and is excellent in sunlight reflection, heat transfer, and electrical conductivity. In artificial satellites, honeycomb panels with inserts are constructed by embedding inserts with female threads in honeycomb panels and fixing them with fillers such as resin, and various mounting devices are fastened to the inserts. To be attached.

[0003] As a structure of the honeycomb panel with inserts, for example, there is a structure shown in FIG. FIG. 6 shows a honeycomb sandwich panel with an insert in which both surfaces of the honeycomb panel are covered with a skin to form a sandwich. In FIG. 6, reference numeral 1 denotes a honeycomb sandwich panel. The honeycomb sandwich panel 1 has a honeycomb core 3 and adhesives 8A and 8B on both sides thereof.
And two skins 2 and 4 bonded together. In the same figure, reference numeral 5 denotes an insert loaded in a hole 9 formed in the honeycomb sandwich panel 1, and reference numeral S denotes a honeycomb core for fixing the honeycomb core 3 and the insert 5 of the honeycomb sandwich panel 1 to each other. A filler is shown, and the symbol T indicates a tape for making the height of the insert 5 and the one skin 2 of the sandwich panel 1 the same.

[0004] Such a honeycomb sandwich panel with inserts is manufactured by the following procedure. That is, the adhesive 8 is applied to each of the honeycomb core 3 and both sides sandwiching the honeycomb core.
The sandwich panels 1 are formed by attaching the epidermis 2 and 4 via A and 8B. An insert mounting hole 6 for mounting the insert 5 is drilled with a drill D, and a part of the periphery of the honeycomb core 3 cut out from the insert mounting hole 6 is removed after being spotted. The filler S is injected into the filling hole 9 formed by removing the insert mounting hole 6 and the counterbore around the hole 6, and then inserting the filler S using a tape T or a simple jig (not shown). 5
The filler S is cured in a state where is fixed, and the shape of the filling hole 9 prevents the insert 5 and the filler S from falling out. Such operations are performed in the same manner regardless of the number of inserts 5 installed.

[0005]

In the above-described honeycomb sandwich panel with inserts, the inserts 5 are fixed using a tape T or a simple jig in the manufacturing process, and the fixing is maintained until the curing of the filler S is completed. It is necessary to keep. For this reason, when a plurality of inserts 5 are required due to the number of devices mounted on the panel, etc.,
Because the work of each insert 5 is individually performed using the tape T or the simple jig, it may be difficult to accurately determine and maintain the pitch between the inserts 5 and the flatness between the inserts. . The filling hole 9 is
After the perforation, the cutout is formed by scraping the cutout to the outside. However, the scraping operation is troublesome, and particularly when the number of insert mounting holes is large, the operation requires a large number of man-hours. In addition, another factor that causes the working time to be prolonged due to such man-hours is the curing time of the filled filler. The filler is filled so as to fill the filling hole 9, but if the filling amount is large, it takes time to cure, and during that time, if unexpected external force acts on the inserts, the flatness between the inserts cannot be obtained. There is a fear.

In view of the above-mentioned problems in the conventional method of manufacturing a honeycomb sandwich panel with inserts, an object of the present invention is to provide a highly accurate arrangement pitch between inserts and a flatness between inserts even when the number of inserts is large. An object of the present invention is to provide a method for manufacturing a honeycomb sandwich panel with an insert that can be easily maintained.

[0007]

In order to achieve this object, an invention according to claim 1 is a method for attaching an insert to a honeycomb sandwich panel used as a structure of an artificial satellite or the like. After the insert mounting hole is formed in the honeycomb core of the above, after forming the insert mounting hole, a skin is adhered to both surfaces of the honeycomb core with an adhesive, and the skin is positioned on the side of the skin where the insert is mounted. The insert mounting hole is pierced in the outer skin to be inserted, and the insert inserted from the insert mounting hole into the insert mounting hole is suspended by a jig installed flush with the insert mounting hole. It is characterized in that the filler injected into the mounting hole is cured.

According to a second aspect of the present invention, in the method for mounting an insert on a honeycomb sandwich panel according to the first aspect, after piercing the insert mounting hole, a positioning plate having a through hole at a location corresponding to the insert mounting hole. The jig is formed by superimposing a flat template on which the insert is suspended and supported by the pin bolts fitted into the through holes, and the jig and the honeycomb are formed in a state where the insert is suspended and supported by the jig. It is characterized in that the sandwich panel and the sandwich panel are brought into close contact with each other.

According to a third aspect of the present invention, there is provided a method for mounting an insert to a honeycomb sandwich panel used as a structure of an artificial satellite or the like, wherein a filler is partially filled in an insert mounting hole provided in the honeycomb panel. A positioning plate having a through hole at a position corresponding to the mounting position of the insert and a template are superimposed, and the insert is suspended and supported on the template by pin bolts which are fitted in the through holes of the positioning plate, and the insert is mounted on the insert. It is characterized in that the template is inserted into the hole to bring the template and the honeycomb panel into close contact with each other, and the filler in the insert mounting hole is cured to fix the insert.

[0010]

According to the first aspect of the present invention, the insert mounting hole is formed in the honeycomb core before the honeycomb core is covered with the skin.
Unlike the case where the insert mounting hole is formed after the skin is provided, it is not necessary to scrape the core portion cut off at the portion corresponding to the insert mounting hole to the outside. Moreover, since the insert inserted into the insert mounting hole drilled in the skin is supported by the jig flush with the insert mounting hole until the filler is hardened,
The insert and the honeycomb sandwich panel are kept flush with each other via a jig located on the same plane as the honeycomb sandwich panel.

According to the second aspect of the present invention, the insert and the honeycomb sandwich are brought into close contact with each other by the jig including the template which supports the insert by the pin bolts which are fitted into the through holes of the positioning plate. The insert and the honeycomb sandwich panel are kept flush.

According to the third aspect of the present invention, the filler is partially filled in the insert mounting hole of the honeycomb sandwich panel, and the insert suspended from the template by the pin bolt which is fitted in the through hole of the positioning plate is insert mounted. Since the template and the honeycomb panel are brought into close contact with each other by inserting into the hole, and the filler in the insert mounting hole is hardened, compared with the case where the filler is hardened in a state where the filler is filled in the insert mounting hole. The time required for fixing the insert can be shortened.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a view showing one step of a method for manufacturing a honeycomb sandwich panel with inserts according to an embodiment of the present invention. In FIG. 1, a honeycomb sandwich panel 10 with inserts has the same configuration as that described in FIG. Hereinafter, a method for manufacturing the honeycomb sandwich panel 10 with inserts will be described.

As shown in FIG. 2, the first step in the manufacturing process is an insert mounting hole having a size enough to provide a sufficient adhesive force at the place where the honeycomb core 11 is to be inserted before the cover is covered with the skin. 11A is formed. The insert mounting holes 11A are formed by punching or drilling according to the number of inserts.

As shown in FIG. 3, the second step in the production is to arrange the film-like adhesives 12 on both sides of the honeycomb core 11 having the insert mounting holes 11A, and to attach the skins 13 and 14. The insert 15 is protected by the jig 15 from being deformed. Here, a honeycomb sandwich panel having the skins 13 and 14 on both sides is configured.

After the bonding of the skins 13 and 14, a fourth step is performed. In the fourth step, as shown in FIG. 4, a drill 16 is attached to the skin 13 on the side where the insert 20 is inserted.
An insert mounting hole 13A larger than the insert is drilled corresponding to the position of the insert mounting hole 11A of the honeycomb core 11 by machining using, for example, the honeycomb core 11. In FIG. 4, in the perforation process on the skin 13, a perforated plate 17 corresponding to a positioning plate for defining a perforated position is provided on the surface of the skin 13.
Is used. The perforated plate 17 is made of a plate member having relatively high rigidity, and a high-hardness bush 17A is disposed around an opening through which the drill 16 is inserted. Bush 17A
Is designed to restrict the displacement of the drilling position due to the runout of the drill 16.

When the insert mounting hole 13A is pierced in the skin 13, a fifth step is performed as shown in FIG. In the fifth step, the insert 20 is suspended and supported by the jig and held until the curing of the filler is completed. That is,
In FIG. 1, before injecting the filler, the perforated plate 17 used for perforating the insert mounting holes 13A is removed from the honeycomb sandwich panel to mount the insert 20. A pin bolt 19 sliding on the bush 17A is inserted into the perforated plate 17 removed from the honeycomb sandwich panel, and the insert 20 is fixed to the template 18 superposed on the perforated plate 17. Template 18
An injection port, which will be described later, is used at the time of the second injection of the filler.

On the other hand, as shown in FIG. 1, the insert mounting hole 11A of the honeycomb sandwich panel from which the perforated plate 17 has been removed is at least half the depth of the insert mounting hole 11A, that is, a part or a part of the insert 20. Filler (indicated by the symbol S shown in FIG. 6 for convenience) is injected so as to be almost buried. When the filler S is injected, the template 18 having the pin bolt 19 to which the insert 20 is fastened is inserted by the perforated plate 17 into the insert mounting hole 13.
The position of A is determined and mounted on the upper surface of the skin 13 of the honeycomb core 11. At the time of fastening, the insert 20 does not proceed any further when its top surface comes into contact with the template 18, and since the template 18 is placed on the upper surface of the honeycomb sandwich panel, the insert 20 is flush with the upper surface of the honeycomb sandwich panel. In this state, the filler S is fixed and held by a C-type clamp or weight until the filler S is hardened, and this state is maintained.

When the filler S is hardened, the insert 20 partially or almost buried in the filler S is fixed with the top surface flush with the upper surface of the honeycomb core 11 as described above. . When this step is completed, the pin bolt 1
9 is removed, the perforated plate 17 and the template 18 are removed, and the sixth step is performed. In the sixth step, as shown in FIG. 5, the filler S is injected from the injection port of the insert 20 that is exposed by removing the template 18, and the inside of the insert mounting hole 11A is filled with the filler S. Thereafter, the filler S is cured as it is, or in a state where the perforated plate 17 and the template 18 and the honeycomb sandwich panel are tightly held or pressed by a C-shaped clamp or a weight.

When the filler S is completely hardened, the perforated plate 17 and the template 18 are removed when a C-shaped clamp or weight is used.

According to the above embodiment, the perforated plate 17
And by using the template 18, the arrangement pitch of the inserts 20 is accurately maintained, and the insert 20 and the honeycomb sandwich panel are maintained on the same plane, so that the pitch accuracy and flatness of the inserts 20 can be improved. it can.

[0022]

As described above, according to the first aspect of the present invention, since the insert mounting holes are formed in the honeycomb core before being covered with the skin, the insert mounting holes are formed after the skin is provided. In contrast to the case where the core portion is cut off at the portion corresponding to the insert mounting hole, it is not necessary to scrape the core portion to the outside. Moreover, the insert inserted into the insert mounting hole drilled in the skin is supported by the jig flush with the insert mounting hole until the filler is hardened, so that the insert is flush with the honeycomb sandwich panel. It is possible to obtain a method for manufacturing a honeycomb sandwich panel with inserts, which can easily maintain the same state between the insert and the honeycomb sandwich panel via the jig located at the position.

According to the second aspect of the present invention, the arrangement pitch of the inserts is adjusted by the positioning plate, and
Since the jig constituted by the positioning plate and the template and the honeycomb sandwich panel are maintained in close contact with each other until the curing of the filler is completed, the flatness of the insert and the honeycomb sandwich panel can be easily maintained. A method for manufacturing a honeycomb sandwich panel with inserts can be obtained.

According to the third aspect of the present invention, the filler is partially filled in the insert mounting hole of the honeycomb sandwich panel, and the insert suspended from the template by the pin bolt which is fitted in the through hole of the positioning plate is used. Since the filler is hardened in a state where the template and the honeycomb panel are in close contact with each other by being inserted into the insert mounting hole, the filler is partially filled as compared with the case where the filler is hardened while being filled in the insert mounting hole. It is possible to fix a part of the insert with the filler being
The time required for fixing the insert can be shortened,
It is possible to obtain a method for manufacturing a honeycomb sandwich panel with inserts, which can improve the workability for mounting the inserts.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a honeycomb sandwich panel with an insert by utilizing a part of a manufacturing process of a honeycomb sandwich panel with an insert according to an embodiment of the present invention.

2A and 2B are views for explaining a manufacturing process of a honeycomb core used for the honeycomb sandwich panel with inserts shown in FIG. 1, wherein FIG. 2A is a plan view and FIG.
It is an arrow sectional view of the direction shown by the code | symbol B inside.

FIGS. 3A and 3B are diagrams for explaining another process in the manufacturing process of the honeycomb core used for the honeycomb sandwich panel with inserts shown in FIG. 1; FIG.
(B) is an arrow cross-sectional view in the direction indicated by reference numeral B in (A).

FIG. 4 is a schematic view for explaining a step of forming an insert mounting hole provided in a honeycomb core used in the honeycomb sandwich panel with inserts shown in FIG. 1;

FIG. 5 is a schematic diagram for explaining a process of mounting the honeycomb sandwich panel and the insert shown in FIG. 1;

FIG. 6 is a schematic view for explaining a structure of a conventional honeycomb sandwich panel with inserts and a part of a manufacturing process thereof.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Honeycomb sandwich panel with insert 11 Honeycomb core 11A Insert mounting hole 12 Adhesive 13, 14 Skin 13A Insert mounting hole 17 Perforated plate equivalent to positioning plate 18 Template which is a component of jig 20 Insert S Filler

Claims (3)

[Claims] 1. A method for mounting an insert on a honeycomb sandwich panel used as a structure of an artificial satellite or the like, comprising forming an insert mounting hole in a honeycomb core before being covered with a skin, and after forming the insert mounting hole. A skin is adhered to both surfaces of the honeycomb core with an adhesive, and an insert mounting hole is pierced in a surface of the surface skin located on a side on which the insert is mounted, and an insert is formed from the insert mounting hole. A honeycomb sandwich panel, wherein a filler injected into the insert mounting hole is cured while an insert inserted into the mounting hole is suspended and supported by a jig installed flush with the insert mounting hole. How to attach inserts to 2. The method for mounting an insert on a honeycomb sandwich panel according to claim 1, wherein after piercing the insert mounting hole, the positioning plate having a through hole at a position corresponding to the insert mounting hole is slidably fitted to the through hole. The jig is formed by superimposing the flat template on which the insert is suspended and supported by the pin bolts, and the jig and the honeycomb sandwich panel are closely attached to each other with the insert suspended on the jig. A method for attaching an insert to a honeycomb sandwich panel. 3. A method for mounting an insert to a honeycomb sandwich panel used as a structure of an artificial satellite or the like, wherein a filler is partially filled in an insert mounting hole provided in the honeycomb panel to correspond to an insert mounting position. Polymerized positioning plate and template with through holes in the
The insert is suspended and supported on the template by a pin bolt that is slid into the through hole of the positioning plate, and the insert is inserted into the insert mounting hole so that the template and the honeycomb panel are brought into close contact with each other. A method of attaching an insert to a honeycomb sandwich panel, wherein the insert is fixed by curing a filler.