JP3993678B2 - Polishing tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary tool suitable for deburring and polishing. More specifically, the present invention relates to a polishing tool suitable for deburring and polishing a metal such as iron or iron alloy, aluminum or aluminum alloy, copper or copper alloy, Mg alloy or Ni or Ni alloy.
[0002]
[Prior art]
Conventionally, as a method for removing a burr of a round bar, a peeled bar, or a pipe generated at the time of cutting or polishing a cross section thereof, an iron file, a diamond electrodeposition file, a sandpaper, or the like has been used. However, this method had to be relied on manually, and automation was difficult. As this type of tool, as disclosed in Japanese Patent Publication No. 1-102504, a plurality of fiber layers in which ceramic fibers such as alumina fibers are aligned in one direction are laminated, and a thermosetting resin or the like is laminated thereon. There is known a tool in which a resin disk binder is impregnated and cured to form a dense disk body, the fiber ends of the ceramic fibers are exposed as processing elements on the outer peripheral surface of the disk body, and processing can be performed at the fiber ends. It has been.
[0003]
[Problems to be solved by the invention]
In the case of the conventional tool, since it is necessary to make the entire tool dense, it is not possible to use a fiber cloth, and it is necessary to stack a plurality of fiber layers aligned in one direction. Therefore, there is a problem of delamination between fiber layers, and there is a disadvantage that it cannot be formed into a rotary tool having sufficient strength, and a rotary tool that performs deburring and polishing on this type of side using ceramic fibers as a processing element is At present, it has not been put into practical use.
That is, the conventionally known disc body in which the fiber layers aligned in one direction are overlapped, the step generated in the portion where the warp and weft overlap and the portion where it does not overlap, as in the case of fiber cloth. No cross-gap pattern was produced by the knives, and the side surfaces of the yarn were just aligned and lined up, so it was impossible to deburr or polish the side surfaces of the disk. That is, it is impossible to perform polishing or deburring on the side surfaces of the yarns that are lined up in a straight line.
Therefore, as a general method of deburring and polishing, a sandpaper is attached to a rotating disc grinder or an offset grindstone is set on the disc grinder and pressed against the surface to be polished or a place where the burr is to be removed. It was a common method to take off. However, the disadvantages of this method are that return burr is generated, and sandpaper or the like is clogged or loses abrasive grains and needs to be replaced immediately.
Accordingly, the present invention aims to provide a polishing tool that eliminates the disadvantages of the prior art and is suitable for deburring using ceramic fibers and that has sufficient strength and excellent workability. And
[0004]
[Means for Solving the Problems]
As a result of diligent research to achieve the above object, the present inventors, contrary to the common sense that the entire tool as a premise of the prior art must be densely constructed, a ceramic fiber cloth formed by weaving ceramic fiber bundles And the perimeter of the stitches by the fiber bundles constituting the fiber cloth is ground or polished to form a cut surface of the filament constituting the fiber bundle at the intersection, and the end face of the filament thus formed Thus, it was found that a polishing tool having extremely high strength and good workability can be obtained.
The polishing tool of the present invention is made based on such knowledge, and is formed into a disk body by impregnating and curing a resin binder on at least one ceramic fiber cloth formed by weaving ceramic fiber bundles, and at least both surfaces of the disk body are formed. A cutting surface is formed at a crossing portion of a mesh formed by the fiber bundle of the ceramic fiber cloth on a side surface to be deburred or polished so that an end face of the filament constituting the ceramic fiber bundle appears. It is characterized in that deburring or polishing can be performed by using the end face of.
The polishing tool according to claim 2 is characterized in that the end face of the filament appears on the entire side surface side where deburring or polishing of the side surface of the disk body is performed.
The polishing tool according to claim 3 is characterized in that the ceramic fiber cloth is a glass fiber cloth, an alumina fiber cloth, or a silicon carbide fiber cloth.
The polishing tool according to claim 4 is characterized in that the ceramic fiber cloth is a plain weave, a twill weave, or a triaxial weave.
The polishing tool according to claim 5 is characterized in that the resin binder is a thermosetting resin such as an epoxy resin.
According to a sixth aspect of the present invention, there is provided a polishing tool manufacturing method comprising impregnating and curing a resin binder on at least one ceramic fiber cloth formed by weaving a ceramic fiber bundle so that end faces of the filaments constituting the ceramic fiber bundle are circumferential surfaces. A disk body that is formed in the ceramic fiber bundle is cut by grinding or polishing at least a side surface used for deburring or polishing among the side surfaces of the disk body, and the filament formed by this cutting is cut. An end face appears on the side face.
According to a seventh aspect of the present invention, there is provided a polishing tool manufacturing method comprising grinding or polishing an entire side surface of the disc body to cut a filament constituting the ceramic fiber bundle, and an end surface of the filament formed by the cutting is used as the side surface. It is characterized by appearing throughout.
[0005]
As described above, according to the present invention, part or all of the warp and weft of the fiber cloth are cut by grinding or polishing, and the end face of the filament of the fiber bundle (yarn, strand, etc.) forming the fiber cloth is polished. By exposing the surface to the side where the deburring or polishing is performed, a polishing tool which does not cause return burrs and has a very good polishing surface can be obtained.
In other words, the disc body thus created is attached to a metal disc with its deburring and polishing surface facing outward, the metal disc is rotated, and the workpiece is pressed against it to perform deburring and polishing. Deburring and polishing without returning burrs over time is possible.
Alternatively, the fiber cloth disk can be attached to a rotary polishing tool for hand polishing. In this case, since the disk body of the fiber cloth has elasticity, it can be polished while being pressed and deformed like the sandpaper.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Examples of the ceramic fiber constituting the ceramic fiber cloth include glass fiber, alumina fiber, silicon carbide fiber, boron fiber, silicon nitride fiber, etc. When a fiber cloth or a silicon carbide fiber cloth was used, it was confirmed that an extremely smooth polished surface with no return burr was obtained.
[0007]
The ceramic fiber cloth may be formed into a disk body by being impregnated and cured with a resin binder after one or a plurality of ceramic fiber cloths are stacked, or a plurality of sheets impregnated with a resin binder one by one. In addition, the resin is cured to form a disk body in which a plurality of fiber cloths are laminated, and then a part or all of the mesh intersections of the warp yarns or weft yarns on the side surfaces of the disk body are ground or polished. By cutting, the cut surfaces of the filaments constituting the warp fiber bundle and the weft fiber bundle are exposed, and the end surfaces of the filaments are deburred and polished easily.
[0008]
In addition, the weaving method of the cloth is arbitrary, such as a biaxial woven cloth such as a plain weave, a twill weave, and a satin weave, or a triaxial woven cloth. However, a plain weave, a twill weave, or a triaxial woven fabric is preferable from the viewpoint of the density and uniformity of the intersections of the ceramic fiber bundles.
[0009]
Moreover, the resin binder impregnated in the ceramic fiber cloth is not particularly limited, but a thermosetting resin such as an epoxy resin is preferable. In addition, when heat resistance is required, it is preferable to use heat resistant resins such as polyimide and polyamide resin. As the resin binder, even a heat-resistant thermoplastic resin can be used.
[0010]
The fiber content of the polishing tool is preferably in the range of 60 to 83% by weight. If it is less than 60% by weight, the deburring / polishing ability is lowered, and if it exceeds 83% by weight, there is a risk of delamination between fiber cloths during deburring / polishing. The range of is optimal.
[0011]
As a method for exposing the end face of the filament constituting the fiber bundle by cutting the warp and weft mesh intersections forming the fiber cloth on the side of the polishing tool of the present invention, sand, ceramic powder, etc. by sandblasting on the side of the disk body A part of or all of the mesh intersections of the warp and weft yarns of the fiber cloth located on the side surface of the disk body by spraying with air or by grinding or polishing the side surface with an alumina grindstone or diamond electrodeposition grindstone It is done simply by cutting.
[0012]
【Example】
Next, embodiments of the polishing tool of the present invention will be described with reference to the drawings.
Example 1
First, a ceramic fiber cloth (weighing 320 g / m ² ) obtained by weaving an alumina fiber strand (9 μm, 1000 filaments) having γ-alumina crystals composed of 85 wt% alumina fiber component and 15 wt% silica component into a plain weave cloth. , Thickness 0.2 mm) is cut into about 20 cm × 20 cm, epoxy resin (Epicoat 828: Epicoat 1001 = 6: 4, manufactured by Yuka Shell Epoxy Co., Ltd., curing agent Boron trifluoride monoethylamine, 2. 5%, adjusted to 35% of the total resin amount of methyl ethyl ketone as a solvent.) After impregnation, 3 sheets were prepared by squeezing excess resin liquid with a rubber roller press.
Three pieces of predetermined alumina fiber cloth prepregs obtained by drying this at 95 ° C. for 60 minutes with a hot air dryer were laminated, and the temperature was 160 ° C., the pressure was 20 kg / cm ² , and the time was 60 minutes. After being slowly cooled to near room temperature, it was taken out from a hot press, and the resulting resin-impregnated cloth was processed into a donut shape having a diameter of 96 mm, an inner diameter of 30 mm, and a thickness of 0.5 mm as shown in FIG. Thus, a thin alumina fiber reinforced resin (ALFRP) disk 31 was prepared.
The side surface 33 of the disk body 31 obtained in this way is polished with # 400 sandpaper containing diamond abrasive grains, and the fibers constituting the ceramic fiber cloth 10 of the side surface 33 of the disk body 31 as shown in FIGS. One side 33 of the disk body 31 is formed in a state in which a part of the fiber bundle 11 of the intersection portion 14 where the warp and weft which are the bundle 11 overlap and form a convex portion is cut and the end face 13 of the filament 12 protrudes. The deburring polishing tool 30 was obtained.
In the figure, the resin binder is omitted, and only the configuration of the ceramic fiber cloth 10 is schematically shown.
[0013]
Using this deburring / polishing tool 30, this was affixed to an aluminum disk having a diameter of 10 cm, and this disk was rotated to deburr and grind φ20 mm aluminum rods and iron rods. In addition, it was possible to obtain a polished surface having an excellent finish with a # 1200 grindstone.
[0014]
(Example 2)
As shown in FIG. 4, only one prepreg cloth prepared in the same manner as in Example 1 was used, press-molded under the same molding conditions as in Example 1, cut in the same way as in Example 1, and one cloth A disk body 31 made of Similar to Example 1, the disc body 31 is made of # 400 sandpaper containing diamond abrasive grains, and the side surface 33 of the disc body 31 is polished to form a convex portion where the warp and the weft of the side surface 33 of the disc body 31 overlap. A part of the fiber bundle 11 was cut and the side surface 33 of the disk body 31 was finished in a state where the end face 13 of the filament 12 was protruding, and a deburring polishing tool was obtained.
[0015]
Using this deburring / polishing tool, deburring and grinding of φ20 mm aluminum rods and iron rods with cutting burrs were performed in the same manner as in Example 1, and the burrs simply fell off and no burrs were produced. A good polished surface comparable to the finishing by can be obtained.
[0016]
(Example 3)
Next, in place of the alumina fiber cloth of Example 1, a deburring polishing tool similar to that of Example 1 was prepared using silicon carbide fiber cloth. As in Example 1, a return burr was produced. Moreover, the polished surface of the object to be polished showed excellent surface smoothness.
[0017]
(Example 4)
Next, in place of the alumina fiber cloth of Example 1, a deburring polishing tool similar to that of Example 1 was prepared using glass fiber cloth.
The disk body made of this glass fiber was attached to an aluminum disk in the same manner as in Example 1, and when this disk was rotated and deburred and polished on a φ20 aluminum rod and a copper rod, no return burr was produced. A polished surface comparable to # 1200-equivalent whetstone could be obtained.
Unfortunately, deburring and polishing of iron rods was not possible with a disk using glass fiber cloth.
[0018]
In each of the above-described embodiments, only a part of the mesh intersection portion 14 of the ceramic fiber bundle 11 of the ceramic fiber cloth 10 is cut. However, as shown in FIG. It is also possible to cut all the end surfaces 13 of the filaments 12 constituting the fiber bundle 11.
[0019]
【The invention's effect】
As described above, according to the present invention, a polishing tool suitable for deburring using a ceramic fiber cloth can be obtained with sufficient strength and elasticity and excellent workability.
[Brief description of the drawings]
FIG. 1 is a side view of a disk body in the manufacturing process of the polishing tool of the present invention. FIG. 2 is a side view of an embodiment of the polishing tool of the present invention. FIG. 4 is a partially enlarged front view of another embodiment of the polishing tool of the present invention. FIG. 5 is a partially enlarged front view of still another embodiment of the polishing tool of the present invention.
DESCRIPTION OF SYMBOLS 10 Ceramic fiber cloth 11 Ceramic fiber bundle 12 Filament 13 End surface 14 Mesh intersection part 30 Rotary tool 31 Disc body 32 Outer peripheral surface 33 Side surface

Claims (7)

At least one ceramic fiber cloth formed by weaving ceramic fiber bundles is impregnated and cured with a resin binder to form a disk body, and at least one side surface of the disk body is subjected to deburring or polishing on the side surface of the ceramic body. A cut surface is formed at the intersection of the mesh of the fiber bundle of the fiber cloth so that the end face of the filament constituting the ceramic fiber bundle appears, and the end face of the filament can be deburred or polished. A polishing tool characterized by the above.   The polishing tool according to claim 1, wherein an end face of the filament appears on the entire side surface side where deburring or polishing of the side surface of the disk body is performed.   The polishing tool according to claim 1 or 2, wherein the ceramic fiber cloth is a glass fiber cloth, an alumina fiber cloth, or a silicon carbide fiber cloth.   The polishing tool according to any one of claims 1 to 3, wherein the ceramic fiber cloth is a plain weave, a twill weave, or a triaxial weave.   The polishing tool according to any one of claims 1 to 4, wherein the resin binder is a thermosetting resin such as an epoxy resin.   At least one ceramic fiber cloth formed by weaving ceramic fiber bundles is impregnated and cured with a resin binder to form a disk body in which end faces of filaments constituting the ceramic fiber bundle appear on the circumferential surface, and at least a side surface of the disk body The side surface used for deburring or polishing is ground or polished to cut the filament constituting the ceramic fiber bundle, and the end surface of the filament formed by this cutting appears on the side surface. A method for manufacturing an abrasive tool.   The entire side surface of the disc body is ground or polished to cut the filament constituting the ceramic fiber bundle, and the end surface of the filament formed by the cutting appears on the entire side surface. The manufacturing method of the grinding | polishing tool of description.

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