JP2001287128A - Method and device for fixing honeycomb core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a method for fixing honeycomb core capable of fixing easily a honeycomb core during machining the honeycomb core. SOLUTION: This method for fixing honeycomb core to have the honeycomb core 40 fixed on a base plate 10 is that a fixing means 20 extended on the base plate 10 to be inserted inside a cell 41 of the honeycomb core 40 by placing the honeycomb core 40 on the base plate 10 is abutted on a cell wall 42 of the cell 41 in a condition to have the fixing means 20 inserted in the cell 41 for expanding to have the honeycomb core 40 fixed on the base plate 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for fixing a honeycomb core, and more particularly to a method and an apparatus for fixing a honeycomb core on a base plate when the honeycomb core is processed by a processing machine or the like.

[0002]

2. Description of the Related Art For example, a honeycomb core is widely used as a core material laminated between two panels, that is, a core material for a so-called sandwich structure. With this honeycomb core,
A large number of cells are gathered together to form a honeycomb shape as a whole, and have mechanical properties such as high strength by weight. For this reason, for example, it is widely used as a structural material of an aircraft body requiring light weight and high rigidity.

[0003] The end face of the honeycomb core is generally processed by a cutting machine such as an NC milling machine and processed into a desired shape.

However, the honeycomb core is excellent in uniform compressive strength in the cell axis direction, but easily deformed in other directions, for example, in a direction intersecting the cell axis direction. Have. For this reason, if fixing is performed using ordinary clamping means in order to machine the honeycomb core, the honeycomb core is deformed, and high-precision machining is difficult.

[0005] In view of the above, various techniques have conventionally been used. 7 and 8 are diagrams showing a conventional example. In the figure, reference numeral 40 denotes a honeycomb core, reference numeral 10 denotes a base plate on which the honeycomb core 40 is mounted, and reference numeral 4 denotes a base plate.
Reference numeral 5 denotes a block for positioning the honeycomb core 40.

In the method of fixing the honeycomb core 40 shown in FIG. 7, an airtight film 51 is adhered to the fixed surface 40a side of the honeycomb core 40, and the airtight film 51 is sucked by evacuation to attach the honeycomb core 40 to the base plate. 10 to be fixed to the upper surface 10a.

In the figure, reference numeral 52 denotes a groove recessed on the upper surface 10a, reference numeral 53 denotes a vacuum passage having one end communicating with the groove 52 and the other end opening to the side surface of the base plate 10, and reference numeral 54.
Is a sealing material that adheres to the airtight film 51. The vacuum passage 53 is connected to a vacuum pump (not shown).

[0008] The method shown in FIG.
The honeycomb core 40 is placed in the concave portion 10c recessed at 0a, a coagulant heated and melted, for example, polyethylene glycol (PEG) 55 is poured into the concave portion 10c, and the lower portion of the honeycomb core 40 is cooled and hardened. It is fixed to the base plate 10. The honeycomb core 40 fixed to the base plate 10 is removed from the base plate 10 by heating and melting the coagulant again after processing.

[0009]

However, the fixing method using the hermetic film 51 as shown in FIG. 7 requires a step of peeling the hermetic film 51 after processing.
Further, during the peeling operation, an unnecessary force is applied to the honeycomb core 40, and the honeycomb core 40 may be deformed.

Further, since the adhesive of the airtight film 51 adheres to the honeycomb core 40, a step of dropping the adhesive after the peeling step is required. Therefore, many work steps were required. Further, since the airtight film 51 used for fixing the honeycomb core 40 cannot be reused, the manufacturing cost has increased.

On the other hand, the fixing method using the coagulant 55 as shown in FIG. 8 has a problem that it takes a long time to cure and melt the coagulant 55, and the work time is prolonged.
Further, at the time of cutting, the coagulating agent 55 is also cut at the same time depending on the processing portion of the honeycomb core 40, so that the cut coagulating agent 55 may be scattered as a powder into the working area, thereby deteriorating the working environment. There is.

Further, since the coagulant 55 used for fixing the honeycomb core 40 is mixed with the cut pieces of the honeycomb core 40, it is difficult to reuse the coagulant 55 and it is uneconomical. Further, in the step of cleaning the honeycomb core 40 after machining, the coagulant 55 also needs to be dropped, and there is a problem that the coagulant 55 is mixed into the cleaning agent and the life cycle of the cleaning agent is shortened.

The present invention has been made in view of the above points, and an object of the present invention is to provide a honeycomb core fixing device capable of easily fixing a honeycomb core during processing of the honeycomb core.

[0014]

Means for Solving the Problems To solve the above problems, a method for fixing a honeycomb core according to the first aspect of the present invention is a method for fixing a honeycomb core on a base plate. The fixing means inserted into the cell of the honeycomb core by mounting the honeycomb core on the base plate is enlarged in a state where the honeycomb core is inserted into the cell, and abutted against the cell wall of the cell to make the honeycomb core a base plate. It is fixed on top.

According to a first aspect of the present invention, a honeycomb core is placed on a base plate so that fixing means protruding from the base plate is inserted into the cell, and the fixing means is enlarged in the cell to increase the cell size of the cell. The honeycomb core is fixed to the base plate by making contact with the wall. According to this, the fixing means protruding from the base plate and inserted into the cell of the honeycomb core is enlarged in the cell and abuts on the cell wall, so that the honeycomb core can be easily and reliably fixed to the base plate. .

A honeycomb core fixing device according to a second aspect of the present invention is a honeycomb core fixing device having a base plate on which a honeycomb core is mounted and fixing means for fixing the honeycomb core on the base plate. A honeycomb core is provided on the base plate and inserted into the cells of the honeycomb core by mounting the honeycomb core on the base plate. The honeycomb core is fixed to the base plate by abutting against a burr projecting from the cell end in a direction intersecting the cell axis.

According to a second aspect of the present invention, the fixing means projects and protrudes from the base plate and expands and contracts in the cells inserted into the cells of the honeycomb core by mounting the honeycomb core on the base plate. It is easy and easy to fix the honeycomb core on the base plate by expanding the expansion and contraction portion in the cell of the honeycomb core and abutting on the burr protruding from the cell end in the direction intersecting the cell axis. The honeycomb core can be reliably fixed on the base plate.

A honeycomb core fixing device according to a third aspect of the present invention is a honeycomb core fixing device having a base plate on which a honeycomb core is mounted and fixing means for fixing the honeycomb core on the base plate. A base portion which is mounted vertically through a mounting hole portion formed in the base plate, a shaft portion which penetrates a shaft hole formed in the base portion and projects upward and downward from the base portion, and an upper portion of the shaft portion. An arm portion having a fixed base end and a front end extending along the shaft portion, and an urging portion provided on the base portion to move the front end of the arm portion away from the shaft portion by downward movement of the shaft portion.

Then, the honeycomb core is placed on the base plate such that the fixing means is loosely inserted into the cells of the honeycomb core, and the shaft portion is moved downward so that the distal end side of the arm portion is widened and placed on the base plate. A burr projecting from the cell end of the honeycomb core in a direction intersecting the cell axis is sandwiched between the tip of the arm and the base to fix the honeycomb core on the base plate.

According to the third aspect of the present invention, the fixing means comprises: a base provided on the base plate; a shaft provided through the base; and an arm fixed to an upper part of the shaft protruding above the base. And an urging portion provided on the base portion to move the tip of the arm portion away from the shaft portion by the downward movement of the shaft portion.

Therefore, the honeycomb core is placed on the base plate so that the fixing means is loosely inserted into the cells of the honeycomb core, the shaft is moved downward, and the distal end side of the arm is widened by the urging means. By holding a burr projecting in a direction intersecting the cell axis from the cell end of the honeycomb core mounted on the plate between the tip of the arm and the base, the honeycomb core is easily and securely fixed on the base plate. be able to.

In the honeycomb core fixing device according to the fourth aspect of the present invention, the arm portion is deformed along the cell wall due to the contact with the cell wall, and the rigidity at which the tip of the arm portion moves to the corner of the cell. It is characterized by having.

According to the fourth aspect of the present invention, the arm is deformed along the cell wall when the arm contacts the cell wall, and the tip of the arm has rigidity to move to the corner of the cell. When contacting the cell wall, it is possible to contact the corner of the cell having the highest rigidity in the cell. Therefore, deformation of the cell due to the tip of the arm can be prevented, and the honeycomb core can be more reliably fixed.

A honeycomb core fixing device according to a fifth aspect of the present invention is characterized in that the urging portion moves the tip of the arm portion away from the shaft portion by insertion between the arm portion and the shaft portion. According to the fifth aspect of the present invention, since the biasing portion is inserted between the arm portion and the shaft portion, the tip of the arm portion is separated from the shaft portion. Can be spread out.

A honeycomb core fixing device according to a sixth aspect of the present invention is characterized in that the base has slide means movable along the upper surface of the base plate. According to the invention of claim 6, since the base has slide means movable along the upper surface of the base plate, the base is moved in accordance with the position of the cell of the honeycomb core mounted on the base plate, and the base is moved to an appropriate position. Can be arranged. Therefore, the honeycomb core can be securely fixed on the base plate.

According to a seventh aspect of the present invention, there is provided a honeycomb core fixing device having, at a position below a base plate, a plate movable in a direction of coming into contact with and separating from the base plate, and the lower end of a shaft portion is fixed to the plate. It is characterized by being. The invention according to claim 7 has a plate below the base plate that is movable in the direction of coming into contact with and separating from the base plate, and the lower end of the shaft portion is fixed to the plate. By moving the shaft part up and down, the shaft part can be moved up and down, and the tip of the arm part can be spread or closed.

Also, by fixing each shaft of the plurality of fixing means to the plate and moving the plate toward and away from the base plate, each arm of each fixing means can be simultaneously expanded and contracted. Therefore, the honeycomb core is placed on the base plate so that the plurality of fixing means are respectively inserted into the cells, and each arm is attached to the cell wall of the cell in which each fixing means is inserted by moving the plate downward. The tips of the parts can be brought into contact with each other, and each arm can be separated from the cell wall by moving the plate upward. This makes it possible to easily fix and release the honeycomb core on the base plate.

[0028] The honeycomb core fixing device according to the eighth aspect of the present invention is characterized in that the plate is fixed to a lower end of the shaft portion and has a holding means slidable along the upper surface of the plate. According to this, since the plate is fixed to the lower end of the shaft portion and has holding means that can slide along the upper surface of the plate, the base provided on the base plate slides along the upper surface of the base plate. In this case, the holding means can be slid in accordance with the position of the base.

Therefore, when each shaft of the plurality of fixing means is fixed to the plate via the holding means,
The amount of vertical movement of the shaft portion due to the movement of the base plate in the contact / separation direction can be made equal between the fixing means, and the tip of each arm can be brought into contact with the cell wall with equal force. Thereby, the honeycomb core can be stably fixed on the base plate.

[0030]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall view showing a honeycomb core fixing device according to the present embodiment in cross section, and FIG.
FIG. 3 is a view showing an operation state of FIG. 1, FIG. 3 is a perspective view of a fixing unit,
FIG. 4 is an enlarged view of a main part showing a state before fixing the honeycomb core,
FIG. 5 is an enlarged view of a main part showing a fixed state of the honeycomb core, and FIG. 6 is a sectional view taken along line XX of FIG. Note that the same components as those in the related art are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 1, the honeycomb core fixing device 1 includes a base plate 10 and a plurality of fixing means 20. The base plate 10 has a flat plate shape, and has a leg 11 at an end. A plate 17 is disposed on the lower surface 10b side of the base plate 10 so as to be opposed thereto, and is movably held in a direction in which the base plate 10 comes into contact with and separates from the base plate 10 by driving means such as an air cylinder, not shown.

As shown in FIG. 4, the base plate 10 is provided with a mounting hole 12 for mounting the fixing means 20. The mounting hole 12 includes a through hole 13 vertically penetrating the base plate 10, an upper surface 10 a side and a lower surface 10 b of the through hole 13.
A substantially disk-shaped concave portion 14, 15 having a diameter larger than that of the through hole 13.
And a mounting flange portion 16 is formed between the concave portions 14 and 15.

A fixing means 20 is mounted in each of the plurality of mounting holes 12. As shown in FIG. 3, the fixing means 20 has a base 21, a shaft 26, and an arm (expansion and contraction) 30.

As shown in FIG. 4, the base 21 has a column 22 having a length protruding upward from the mounting hole 12 and a diameter smaller than that of the through hole 13, and a concave portion is formed at the lower end of the column 22. 14, 15 and the mounting flange 1
A first flange portion 23 and a second flange portion 24 are provided so as to sandwich the metal 6 therebetween.

The first flange portion 23 and the second flange portion 24
Are larger than the hole diameter of the through hole 13 and the concave portions 14 and 15
The upper surface 23 a of the first flange portion 23 is flush with the upper surface 10 a of the base plate 10.

The first flange portion 23 and the second flange portion 24
The mounting means 12 and the mounting hole 12 form a sliding means for the base 21.
It is possible to slide freely along the upper surface 10a in the insides 4 and 15.

The cylindrical portion 22 is provided with a shaft hole 25 penetrating the axis thereof, and the shaft portion 26 is fitted into the shaft hole 25. The shaft 26 has a length vertically penetrating the column 22, and a lower end 26 b protruding downward from the column 22 is connected to the holding portion 27.

As shown in FIG. 3, the holding portion 27 has a substantially disk shape having substantially the same diameter as the first flange 23 and the second flange 24. The lower end portion 26b of the shaft portion 26 is formed at the center of the upper surface. Are combined. The holding portion 27 is a plate 17
Is held in a holding hole 18 which is recessed.

As shown in FIG. 4, the holding hole 18 has a small diameter that is smaller than the outer diameter of the holding portion 27 from the upper surface 17a of the plate 17 and has an inner diameter that allows the shaft portion 26 to freely move. A hole 18a and a large-diameter hole 18b that is larger than the outer diameter of the holding portion 27 and that allows the holding portion 27 to slide freely inward continuously from the lower end of the small-diameter hole 18a. The holding portion 27 slides in the large-diameter hole 18 b according to the position of the shaft portion 26, and moves the shaft portion 26 in the vertical direction in accordance with the vertical movement of the plate 17.

A shaft 26 protruding above the column 22
The base end 31 of the arm 30 is fixed to the upper portion 26a of the arm 30. The arm portion 30 is a rod-shaped member having high elasticity, such as a piano wire, extending downward from the base end 31 along the shaft portion 26. Two each are provided.

At the upper end of the cylindrical portion 22, there is provided an urging portion 28 for urging the tip 32 of the arm portion 30 gradually in the radially expanding direction away from the shaft portion 26 in accordance with the downward movement of the shaft portion 26. ing. The biasing portion 28 has a tapered conical shape whose upper end is inserted between the arm portion 30 and the shaft portion 26 and whose diameter gradually increases as it moves downward.

When the shaft 26 moves downward due to the lowering of the plate 17, the arm 30 also moves downward. Therefore, the urging portion 28 is connected between the arm portion 30 and the shaft portion 26 at the base end 3.
Go into one side. For this reason, the arm 30 is urged so that the tip 32 is separated from the shaft 26.

Next, a method for fixing the honeycomb core 40 using the honeycomb core fixing device 1 having the above configuration will be described. First, as shown in FIG. 1, the honeycomb core fixing device 1 is arranged at a raised position such that the plate 17 contacts the lower surface 10 b of the base plate 10, and the honeycomb core 40 is placed on the upper surface 10 a of the base plate 10. You.

Since the base portion 21 and the holding portion 27 are provided so as to be movable in the sliding direction with respect to the base plate 10 and the plate 17, respectively, the position of the fixing means 20 can be easily adjusted to a position corresponding to the cell 41 of the honeycomb core 40. Can be moved and arranged.

After the honeycomb core 40 is placed on the upper surface 10a of the base plate 10, the plate 17 is moved to the base plate 10 by a driving means (not shown) such as an air cylinder.
When the shaft portion 26 is moved in a direction away from the lower side, the shaft portion 26 is moved downward as shown in FIGS.

At the lower end of the cell wall 42, a honeycomb core 40 is provided.
Burrs 44 are generated in a direction perpendicular to the cell axis direction during the manufacture of the device. The burrs 44 are, for example, 0.15 mm to 0.
It has a length of about 2 mm and extends from the lower end of the cell wall 42 in one direction. The burrs are produced by cutting a honeycomb core having a thicker honeycomb core 40 to a desired thickness, so that a portion of the cell wall is bent and left at the time of the cutting process.

The distal end 32 of the arm 30 that has moved to the lower end of the cell wall 42 where the burr 44 has been formed sandwiches the burr 44 with the first flange 23 as shown in FIG.
Thus, the honeycomb core 40 is moved to the upper surface 10 of the base plate 10.
a.

When the shaft portion 26 is moved downward, the arm portion 30 is also moved downward, and the leading ends 32 are urged by the urging portions 28 in the radially expanding direction in which they are separated from each other. The tip 32 of the arm 30 contacts the lower part of the cell wall 42 as shown in FIG. 5, and further moves along the cell wall 42 to contact the corner 43 of the cell 41 as shown in FIG.

Therefore, the honeycomb core 40 can be more securely fixed on the upper surface 10a of the base plate 10. In addition, since the tip 32 abuts on the corner 43 of the cell 41 which is relatively strong against a force in a direction intersecting with the cell axis direction (see FIG. 6), the deformation of the cell 41 can be suppressed.

When the fixing of the honeycomb core 40 is released, the plate 17 is raised to the base plate 10 side. When the plate 17 is raised, the base 2
1, the shaft portion 26 is raised, and the urging portion 28 is
To move from the proximal end 31 side to the distal end 32 side of the
Is restored to its original state by its own elastic force, that is, to extend vertically along the shaft portion 26 (see FIG. 4).

Therefore, the tip 32 of the arm 30 is
Then, the honeycomb core 40 is separated from the cell wall 42 and the fixing of the honeycomb core 40 is released. Then, the honeycomb core 40 can be easily removed from the base plate 10 by lifting the honeycomb core 40 upward.

Although not shown in the drawing, the fixed surface side (lower end of the cell wall 42) of the honeycomb core 40 fixed to the base plate 10 is processed by bonding an outer plate to the processed surface, as shown in FIG. Then, the outer plate is used instead of a conventional airtight film, and is suction-fixed and fixed by vacuuming to perform processing.

The present invention is not limited to the above-described embodiment, and various changes can be made within the gist of the present invention. For example, in the above-described embodiment, the honeycomb core 40 having a hexagonal cross section has been described as an example, but the honeycomb core may have a quadrangular cross section. Further, in the above-described embodiment, an example in which two arm portions 30 are provided for one shaft portion 26 has been described, but a plurality of arm portions 30 may be further provided.

In the above-described embodiment, the example in which the sliding means is provided for each fixing means 20 is shown. However, when the cell size of the honeycomb core 40 to be fixed is fixed, the sliding means is omitted. You can also.

Further, in the above-described embodiment, all the shaft portions 26 are held by one plate 17 and this plate 17
Of the honeycomb core 40 is fixed and released by the movement of the honeycomb core 40 toward and away from the base plate 10.
A moving means may be provided for moving the plurality of shaft portions 26 arranged in a predetermined or predetermined range in the vertical direction.

[0056]

As described above, according to the method for fixing the honeycomb core according to the present invention, the honeycomb core is inserted into the cells of the honeycomb core by mounting the honeycomb core on the base plate. The honeycomb core can be easily and reliably fixed to the base plate because the fixing means is expanded in the state of being inserted into the cell and is brought into contact with the cell wall of the cell.

According to the honeycomb core fixing device of the present invention, in the honeycomb core fixing device having the base plate on which the honeycomb core is mounted and the fixing means for fixing the honeycomb core on the base plate, the fixing means comprises: A honeycomb core is provided on the base plate and inserted into the cells of the honeycomb core by mounting the honeycomb core on the base plate. Since the honeycomb core is spread inside and abuts against the cell wall of the cell, the honeycomb core can be easily and reliably fixed to the base plate.

[Brief description of the drawings]

FIG. 1 is an overall view showing a cross section of a honeycomb core fixing device according to the present embodiment.

FIG. 2 is a diagram showing an operation state of FIG. 1;

FIG. 3 is a perspective view of a fixing means.

FIG. 4 is an enlarged view of a main part showing a state before fixing a honeycomb core.

FIG. 5 is an enlarged view of a main part showing a honeycomb core fixed state.

FIG. 6 is a sectional view taken along line XX of FIG. 5;

FIG. 7 is a diagram showing a conventional example.

FIG. 8 is a diagram showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Base plate 17 Plate 20 Fixing means 22 Base 26 Shaft 28 Energizing part 30 Arm 40 Honeycomb core 41 Cell 42 Cell wall 44 Burr

Claims (8)

[Claims] 1. A honeycomb core fixing method for fixing a honeycomb core on a base plate, wherein the honeycomb core is inserted into a cell of the honeycomb core by projecting the honeycomb core on the base plate and placing the honeycomb core on the base plate. Fixing the honeycomb core to the cell wall of the cell and fixing the honeycomb core on the base plate in a state where the fixing means is inserted into the cell. 2. A honeycomb core fixing device comprising: a base plate on which a honeycomb core is mounted; and fixing means for fixing the honeycomb core on the base plate, wherein the fixing means projects from the base plate and The honeycomb core is inserted into a cell of the honeycomb core by placing the honeycomb core on a base plate, and has an expanding / contracting portion that can be expanded and contracted in the cell, and the expanding / contracting portion is placed in a cell of the honeycomb core. A honeycomb core fixing device, wherein the honeycomb core is fixed to the base plate by expanding and abutting a burr projecting from a cell end in a direction intersecting a cell axis. 3. A honeycomb core fixing device comprising: a base plate on which a honeycomb core is placed; and fixing means for fixing the honeycomb core on the base plate, wherein the fixing means comprises a mounting hole formed in the base plate. A base mounted vertically through the base, a shaft protruding above and below the base through a shaft hole formed in the base, and a base fixed to an upper part of the shaft. The honeycomb includes: an arm having a tip extending along the shaft; and an urging portion provided on the base, the bias being configured to move the tip of the arm apart from the shaft by moving the shaft downward. The honeycomb core is placed on the base plate so that the fixing means is loosely inserted into the cell of the core, and the shaft portion is moved downward so that the distal end side of the arm portion is widened and placed on the base plate. Cell from the cell end of the honeycomb core A honeycomb core fixing device, wherein a burr projecting in a direction intersecting with an axis is sandwiched between a tip of the arm portion and the base portion to fix the honeycomb core on the base plate. 4. The arm portion is deformed along the cell wall by contact with the cell wall,
The honeycomb core fixing device according to claim 3, wherein the tip of the arm has rigidity to move to a corner of the cell. 5. The device according to claim 3, wherein the biasing portion causes the tip of the arm to be separated from the shaft by insertion between the arm and the shaft.
5. The honeycomb core fixing device according to any one of items 1 to 4. 6. The honeycomb core fixing device according to claim 3, wherein the base has slide means movable along an upper surface of the base plate. 7. A lower portion of the base plate, wherein the plate has a plate movable in a direction of coming into contact with and separating from the base plate, and a lower end of the shaft portion is fixed to the plate. 7. The honeycomb core fixing device according to any one of items 1 to 6. 8. The honeycomb core fixing device according to claim 7, wherein the plate has a holding means fixed to a lower end of the shaft portion and slidable along an upper surface of the plate.