JPH1029164A - Rotary tool, and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary tool, bearable in use at a high speed in particular, and having strong strength, in a rotary tool using an inorganic long fiber as grinding and polishing elements. SOLUTION: This rotary tool is constituted, so that an inorganic long fiber 1 can be bound by a thermosetting resin binder, and the rotary tool can be worked by the fiber end of the inorganic long fiber 1. In this case, the inorganic long fiber 1 is a cylindrical body 3 formed by winding the fiber boundle 2 of the inorganic long fiber 1 on the outer periphery of a rotating body 10 while traversing, and at least one end surface of the cylindrical body 3 is formed of the cut surface of the cylindrical body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary tool used for performing processing such as drilling and polishing on a metal or non-metal workpiece.

[0002]

2. Description of the Related Art Conventionally, as a rotary tool of this kind, FIG.
As shown in FIG. 1, inorganic long fibers a such as alumina long fibers aligned in one direction are bound with a thermosetting resin binder such as an epoxy resin, and formed into a desired shape such as a round bar. There is known a rotary tool which performs processing such as perforation and polishing at the fiber end b.

[0003]

However, in the case of the conventional rotary tool, since the aligned long fibers are only arranged along the direction of the rotation axis, for example, a tube made in this manner is used. In the case of round or ring-shaped rotary tools, vertical cracks occur immediately after use, making them useless, and the same applies to rod-shaped rotary tools. If too much force is applied to the rotary tool, the rotary tool may crack even in the case of a rod.
This is an important problem to be solved for a rotary tool using an inorganic long fiber as a grinding element and a polishing element. In particular, it is desired to develop a rotary tool having high strength that can withstand high-speed rotation.

[0004]

Therefore, in order to eliminate the inconvenience of the conventional rotary tool, the rotary tool of the present invention binds inorganic filaments with a thermosetting resin binder, and ends the fibers of the inorganic filaments. In the rotating tool to be processed in, the inorganic long fiber is a cylindrical body formed by winding while bundling the fiber bundle of the inorganic long fiber around the outer periphery of the rotating body, at least the cylindrical body One end surface is formed by a cut surface of the cylindrical body. In this way, a tubular body that can withstand use as a rotary tool is formed by winding the fiber layers having a small thickness in the left and right direction into many layers, and pressing the fiber layers that are wound first by each other. You. The rotary tool according to claim 2 is characterized in that the cut surface is formed by cutting in a direction perpendicular to a rotation axis of the cylindrical body. The rotary tool according to claim 3 is characterized in that the inorganic long fiber is any one of alumina fiber, boron fiber, silicon carbide fiber, silicon nitride fiber, and glass fiber, or a combination thereof. Further, the method for manufacturing a rotary tool according to claim 4 provides a manufacturing method for easily manufacturing the rotary tool, in which an inorganic long fiber impregnated with a thermosetting resin is provided along the rotation direction of the rotary body. It is characterized in that a tubular body formed by winding while being traversed around its outer periphery is cured, and this tubular body is cut so that the fiber end face of the inorganic long fiber is exposed on the cut surface. According to a fifth aspect of the present invention, in the method for manufacturing a rotary tool, the inorganic long fiber impregnated with the thermosetting resin is wound around the outer periphery of the rotating body while being traversed along the rotating direction of the rotating body to form a cylindrical body. The cylindrical body is cut so that the fiber end face of the inorganic long fiber is exposed on the cut surface, and then cured.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The inorganic long fiber may be any material having a processability relative to a workpiece.
For example, if it is a polishing process, it is not particularly limited as long as it is harder and more brittle than the material to be polished, but as described above, alumina fiber, boron fiber, silicon carbide fiber, silicon nitride fiber, glass fiber, etc. The use of is preferred. In particular, when the material to be polished is aluminum, copper or brass, glass fiber is most suitable, and when the material is iron or the like, alumina fiber is suitable. Further, these may be mixed depending on the material to be polished.

As the inorganic long fibers, single fibers having an average fiber diameter of about 3 to 40 μm are used.
m is preferable. This is an inorganic filament
The thinnest fiber currently available as yarn is 3 μm
Also, if it exceeds 40 μm, handling becomes very difficult. However, in consideration of effective use in the grinding area beyond the polishing area, the average fiber diameter is 100 μm.
Fibers between m and 200 μm are ideal. Conversely, if the use in the polishing area is considered rather than the polishing, the finer the fiber, the better the average fiber diameter is 3 μm.

The fiber bundle of the inorganic long fibers has a fiber bundle weight of about 500 to 3000 tex. From the impregnating property of the resin, a plurality of thin fiber bundles of about 500 tex are impregnated into the resin and then aligned. It is ideal that the resin is impregnated, but when the impregnating property of the resin is good, it is also possible to impregnate the resin with a fiber bundle of 1500 tex or 3000 tex as it is.

The thermosetting resin, which is a binder for solidifying the inorganic filaments and is also a matrix of FRP constituting the rotary tool, includes epoxy resin, unsaturated polyester resin, vinyl ester resin, bismaleimide Resin, phenolic resin, etc. are used. In particular, a rotating tool that does not contain voids (bubbles) in spite of containing inorganic filaments can be produced and an epoxy resin having a strong adhesive force to the inorganic filaments is used. Optimal. If there is a void,
For example, metal particles generated during the polishing process enter voids remaining in the FRP material, causing clogging and damaging a surface to be polished having the same hardness as the metal particles during polishing.

The content of the inorganic long fibers is preferably 30 to 75% by volume. When the content is less than 30% by volume, the polishing effect is deteriorated. This is because cracks occur between the fibers and the fibers with a small force. In addition, from the viewpoint of the polishing effect of the rotary tool, it is better that the content of the fiber is large,
A range of volume% is preferred.

In order to manufacture the rotary tool of the present invention, as described above, for example, a fiber bundle of inorganic long fibers impregnated with a thermosetting resin is twilled on the outer periphery of the rotary body along the rotation direction of the rotary body. The tubular body formed by winding is cured, and the tubular body is cut so that the fiber end face of the inorganic continuous fiber is exposed on the cut surface, or the inorganic continuous fiber impregnated with a thermosetting resin. Is wound along the rotation direction of the rotating body while traversing the outer circumference thereof to form a tubular body, and the tubular body is cut so that the fiber end face of the inorganic long fiber is exposed on the cut surface thereof, If it is then cured, it can be easily manufactured, but the cross-sectional shape, diameter, length, or twill angle of the rotating body, thickness of the fiber bundle,
By appropriately selecting the thickness and the like for winding the fiber bundle, it is possible to form a desired rotary tool according to the application. Also, by appropriately selecting a cutting angle of the cylindrical body with respect to the rotation axis when forming the cut surface, a processed surface according to a use can be formed.

FIG. 1 shows an example in which a cylindrical body is used as a rotating body. A fiber bundle 2 of inorganic long fibers 1 impregnated with a thermosetting resin is wrapped around the outer circumference of the rotating body 10 along the rotating direction. It shows a cylindrical body 3 formed by winding while pretending,
After the cylindrical body 3 is cured, the rotating body 10 is pulled out and removed, and then cut, or the cylindrical body 3 before curing is removed.
After cutting and curing, the rotating body 10 may be removed. FIG. 2 is a perspective view showing a cut surface 4 of the tubular body 3, and shows a cut surface 4 formed by cutting the tubular body 3 at a right angle to a rotation axis A of the tubular body 3. . In this case, since the fiber bundle is wound around the rotating body 10 in both the left and right directions, the processing can be performed under the same processing conditions irrespective of the rotating direction when the rotary tool is used.
The cut surface is formed on at least one end surface of the cylindrical body 3 and is used as a processing surface such as polishing. However, cut surfaces are formed on both end surfaces of the cylindrical body 3 and both surfaces are processed. It may be formed on a rotating tool provided.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rotary tool according to the present invention and a method for manufacturing the same will be described below. Alumina fibers having 3000 filaments, a fiber diameter of 9 μm, and 600 Tex are prepared as inorganic filaments, and ten inorganic filaments are aligned to form a fiber bundle, which is passed through a resin bath containing a resin composition having the following compounding ratio. , Resin impregnated. Epoxy resin (DER383J Dow Chemical) 100 parts Tetrahydromethyl phthalic anhydride (HN2200) 80 parts Imidazole (2E4MZ-CN Shikoku Chemicals) 1 part

After impregnating the resin as described above, the fiber bundle was wound around a rotating body 10 having a diameter of 1 cm. This winding was performed while rotating the rotating body. At this time, the fiber bundle was 282 m at a 70 degree twill angle with respect to the axial direction of the rotating body.
It was wound while being shifted by 8.5 mm to the width of m. As a matter of course, when turning after winding rightward and winding leftward, an angle of 70 degrees from the left axis direction (strictly -70
Degree). In this way, a predetermined amount of the fiber bundle was wound while being traversed to form a cylindrical body. In addition,
After forming the tubular body, it is preferable to remove the excess resin by rotating the tubular body in a state where the plate-shaped member is in contact with the outer peripheral surface of the tubular body.

The tubular body formed as described above was then tightly wound with a cellophane tape or the like, and then heated and cured. Heat curing is performed at a temperature of 120 ° C. for about 1 hour, and
As post-curing, heating was performed at a temperature of 160 ° C. for about 6 hours. The cylindrical body thus hardened was pulled out of the rotating body, and both end portions were cut to obtain a polishing rotary tool. In addition, in the above-mentioned example, although it wound up with cellophane tape etc. before hardening, this is for hardening in the state where inorganic long fiber was tightened, and it is trying to lock out excess resin.
In the case where the tubular body is not fastened with a cellophane tape or the like, it is effective to cure the tubular body while rotating the tubular body. The rotation speed in this case is preferably about several tens rpm.

When this rotary tool for polishing was attached to a rotary drill and an iron mold was polished, a very good polished surface could be obtained. The rotary tool could be used without cracking until it was abraded by grinding.

In the above embodiment, the cylindrical body is hardened and then cut to form the rotary tool. However, the cylindrical body before hardening may be cut and then hardened to form the rotary tool. .

[0017]

As described above, according to the present invention, there is provided a rotary tool in which inorganic long fibers are bound with a thermosetting resin binder and processed at the fiber ends of the inorganic long fibers. Since the fiber bundle is made into a rotating body by laminating it in multiple layers in the left and right direction, the binding strength between the inorganic long fibers forming the rotary tool is increased by being held down by the fibers in the left and right directions. It is possible to obtain a rotating tool that does not cause vertical cracks and is not likely to break during rotation.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a manufacturing process of a rotary tool according to the present invention.

FIG. 2 is a perspective view of an embodiment of the rotary tool according to the present invention.

FIG. 3 is a perspective view of a conventional rotary tool.

[Brief description of reference numerals]

 DESCRIPTION OF SYMBOLS 1 Inorganic long fiber 2 Fiber bundle 3 Cylindrical body 4 Cut surface 10 Rotating body A Rotation axis

Claims (5)

[Claims] 1. A rotating tool in which inorganic long fibers are bound with a thermosetting resin binder and processed at fiber ends of said inorganic long fibers, wherein said inorganic long fibers rotate a fiber bundle of said inorganic long fibers. A rotary tool, wherein the rotary tool is a tubular body wound and wound around the outer periphery of the body, and at least one end surface of the tubular body is formed by a cut surface of the tubular body. 2. The rotary tool according to claim 1, wherein the cut surface is formed in a direction perpendicular to a rotation axis of the cylindrical body. 3. The fiber according to claim 1, wherein the inorganic long fiber is any one of alumina fiber, boron fiber, silicon carbide fiber, silicon nitride fiber, and glass fiber, or a combination thereof. The rotary tool according to 1. 4. A cylindrical body formed by winding a fiber bundle of inorganic long fibers impregnated with a thermosetting resin along the rotation direction of the rotating body while traversing the outer circumference thereof, and curing the cylindrical body. A method for manufacturing a rotating tool, comprising cutting a body so that a fiber end face of the inorganic long fiber is exposed on a cut surface thereof. 5. A tubular body formed by winding a fiber bundle of inorganic long fibers impregnated with a thermosetting resin along the rotation direction of a rotating body while traversing the outer circumference thereof. A method for manufacturing a rotary tool, comprising cutting the end face of the inorganic long fiber so that the fiber end face is exposed on the cut surface, and thereafter curing the cut surface.