JPH0457675A - Cutting method for honeycomb core by abrasive mixing high pressure fluid jet - Google Patents

Abstract

PURPOSE:To cut a honeycomb core with good work appearance quality without damage on a cell face, by filling a solid filling material meltable at low temperature into the cell of a honeycomb core run along a cutting projected line, moving a nozzle while injecting a high pressure fluid and removing the solid filling material after cutting the honeycomb core. CONSTITUTION:A solid filling material 6 meltable at low temperature is filled up to the cell 5 internal part of a honeycomb core 3 run along a cutting projected line. A nozzle 11 is then moved while injecting a high pressure fluid 2 from a nozzle l and the solid filling material 6 is removed after cutting the honeycomb core 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cutting method for cutting a honeycomb core using a jet of high-pressure fluid mixed with an abrasive.

[Conventional technology]

A processing technique in which a high-pressure fluid containing an abrasive is injected toward a workpiece to cut the workpiece into a predetermined shape is known, for example, from Japanese Patent Publication No. 13800/1983. In this cutting method, first, a jet of high-pressure fluid is started to be discharged from a nozzle at an arbitrary position in the excess thickness of the workpiece, and the jet of high-pressure fluid is directed along the planned cutting line until the jet of high-pressure fluid penetrates the workpiece. The cutting process is carried out after relatively moving to the position.

This cutting method has advantages such as no heat generation during processing, and is applied to cutting various materials including metal materials. As a conventional technique in which this is applied to cutting honeycomb cores, there is a cutting method described in, for example, Japanese Patent Laid-Open No. 64-87196 and Japanese Patent Laid-Open No. 6487198.

In this cutting method, as shown in FIG. 7, cutting is performed while tilting a moving nozzle 1 and tilting a high-pressure fluid jet 2 at a predetermined angle with respect to the honeycomb core 3, thereby increasing the cutting speed and efficiency of the honeycomb core. The aim is to perform the cutting process well.

[Problem to be solved by the invention]

However, the above-mentioned conventional technology has the drawback that a part of the high-pressure fluid jet 2 that penetrates the cell surface 4 of the honeycomb core 3 scatters and damages the cell surface 4a on the side where cutting is completed, resulting in a loss of product quality. .

SUMMARY OF THE INVENTION Therefore, the present invention provides a cutting method using a jet of high-pressure fluid mixed with an abrasive that can eliminate the drawbacks of the above-mentioned prior art, prevent damage to the cell surface of a honeycomb core due to the flying jet, and improve the machining quality. The purpose is to

[Means to solve the problem]

In order to achieve the above object, the present invention fills the cells of a honeycomb core along a cut line with a solid filling material that can be melted at low temperatures, and moves a nozzle while injecting high-pressure fluid to cut the honeycomb core. After cutting, the solid filling material is removed.

Furthermore, the present invention tilts the nozzle at a predetermined angle toward the product side with respect to the height direction of the honeycomb core in a plane orthogonal to the cutting direction, and vertically cuts the honeycomb core by the diffusion flow of the high-pressure fluid jet. This is a characteristic feature.

[For production]

According to the present invention, since the inside of the cell is filled with solid filling material, the high-pressure fluid jet does not spread and the cell surface is not damaged. After cutting, the solid filling material is melted by heating and can be easily removed and reused.

Further, according to the present invention, since the diffusion flow of the high-pressure fluid jet is parallel to the cell surface on the product side, cutting can be performed without damaging the cell surface.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings. In the following, the same components as in FIG. 7 are given the same reference numerals.

In FIG. 1, a honeycomb core 3 to be cut has cell surfaces 4, 4. A large number of hexagonal cells 5 are continuously partitioned by....

In this embodiment, the honeycomb core 3 is made of a light alloy or a fiber-reinforced composite material, but is not limited thereto.

In FIGS. 2 and 3, the nozzle 1 moves relatively parallel to the honeycomb core 3 while injecting a high-pressure fluid jet 2 containing an abrasive in the thickness direction of the honeycomb core 3. It is now possible to do so.

Therefore, according to the cutting method of the present invention, the hexagonal cells 5, 5 of the honeycomb core 3 are cut in advance. ... is filled with polyethylene glycol as a solid filler 6 that can be melted at low temperatures, and then, as shown in FIG. along the honeycomb core 3. In this case, the hexagonal cells 5, 5 . In addition to the above-mentioned polyethylene glycol, the solid filling material 6 to be filled in...
Can be filled with wax, ice, etc. Moreover, such solid filling material 6 is applied to the entire hexagonal cells 5, 5 . It is not necessary to fill the hexagonal cells 5, 5°, etc. within a predetermined width A around the cutting line 7 as shown in Fig. 2. be. This width A depends on the thickness of the high-pressure fluid jet 2, but is preferably about 20 times the thickness of the high-pressure fluid jet 2.

However, according to such a cutting method, the planned cutting line 7
Hexagonal cells 5, 5 . ... are filled with solid filling material 6, and the cell surfaces 4.4, ... are not exposed, so a part of the high-pressure fluid jet 2 scatters as a diffusion flow and damages the cell surface 4. is prevented from occurring.

After cutting, the solid filler 6 such as polyethylene glycol is melted by heating.

Therefore, it is easy to remove from the product, and the molten material can be recovered and reused.

Next, another embodiment of the cutting method of the present invention will be described with reference to FIGS. 4 to 6. In this case, the same components as in the first embodiment will be given the same reference numerals and detailed explanations thereof will be omitted.

In this embodiment, cutting is performed by moving the nozzle 1 while tilting it so that the high-pressure fluid jet 2 has the following angle with respect to the honeycomb core 3. That is, on a plane perpendicular to the cutting direction 8 of the honeycomb core 3,
The nozzle 1 is tilted at a predetermined angle α toward the product side with respect to the thickness direction 9 of the honeycomb core 3. And this nozzle 1
The nozzle 1 is relatively moved in the cutting direction 8 by ejecting the high-pressure fluid jet 2 while maintaining the inclination angle of .

As shown in FIG. 5, the high-pressure fluid jet 2 forms an angle α with the thickness direction 9 of the honeycomb core 3 and penetrates toward the extra wall side. In this case, the angle between the streamline of the high-pressure fluid jet 2 and the thickness direction 9 of the honeycomb core 3 is α, but the diffusion flow 1 caused by the contact between the high-pressure fluid jet 2 and the cell edge of the honeycomb core 3 The angle α is set so that the angle α is parallel to the cell surface 4 of the honeycomb core 3. Therefore, the honeycomb core 3 is vertically cut by the diffusion flow 10, and the diffusion flow 1o does not damage the cell surface 4 on the product side.

The above angle α is determined using parameters such as the thickness d of the honeycomb core 3, but as shown in Table 1, the inclination angle for each thickness of the honeycomb core is as follows. The value was suitable.

Table 1 [Effects of the Invention] As described above, according to the present invention, a solid filling material that can be melted at a low temperature is filled into the cells of a honeycomb core along a planned cutting line, and a nozzle is injected while injecting high pressure fluid. After moving and cutting the honeycomb core, the solid filling material is removed, so the honeycomb core can be cut with good processing quality without damaging the cell surface due to splashing of high-pressure fluid.
In the present invention, the nozzle is tilted at a predetermined angle toward the product side with respect to the height direction of the honeycomb core in a plane orthogonal to the cutting direction, and the honeycomb core is cut perpendicularly by the diffusion flow of the high-pressure fluid jet. It also prevents damage, expands the range of applications for cutting using abrasive high-pressure fluid jets, and contributes to improving cutting technology for honeycomb cores.

Fig. 3 is a cross-sectional view of the honeycomb core during cutting, and Fig. 4 is a plan view of the honeycomb core to explain the method.
A plan view of a honeycomb core illustrating a cutting method according to another embodiment, FIG. 5 is a cross-sectional view of the honeycomb core during cutting, and FIG. 6 is a
FIG. 7, which is a sectional view of a cut honeycomb core, is an explanatory view showing a method for cutting a honeycomb core using a high-pressure abrasive fluid jet according to the prior art.

DESCRIPTION OF SYMBOLS 1... Nozzle, 2... High-pressure fluid jet, 3... Honeycomb core, 4... Cell surface, 5... Hexagonal cell, 6...
...Solid filler, 7. Cutting plan line, 8. Cutting direction, 9. Thickness direction, 10. Diffusion flow.

[Brief explanation of the drawing]

Claims (1)

[Claims] 1. In a method of cutting a honeycomb core by injecting high-pressure fluid mixed with an abrasive from a nozzle that moves relative to the honeycomb core, a solid filling material that can be melted at a low temperature is cut along a planned cutting line. A method for cutting a honeycomb core using a high-pressure fluid jet, characterized in that the solid filling material is filled into the cells of a honeycomb core along the lines, and after cutting the honeycomb core by moving a nozzle while jetting high-pressure fluid, the solid filling material is removed. . 2. In a method of cutting a honeycomb core by injecting high-pressure fluid mixed with an abrasive from a nozzle that moves relative to the honeycomb core, the nozzle is moved in the height direction of the honeycomb core in a plane perpendicular to the cutting direction. A method for cutting a honeycomb core using a high-pressure fluid jet, characterized in that the honeycomb core is vertically cut by the diffusion flow of the high-pressure fluid jet by tilting the honeycomb core at a predetermined angle toward the product side.