JP2002028873A - Tube brush-like abrasive material and deburring/ polishing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tube brush-like abrasive material having a high deburring capability and a polishing capability, obtaining a good finished surface, and made of long almina fibers and to provide an easy deburring/polishing method on the inner face of a work by using the tube brush-like abrasive material. SOLUTION: Wires are bound by a core wire, and the wires are extended in the peripheral direction around the core wire to form this tube brush-like abrasive material. Long alumina fibers are bound by a resin matrix to form the wires, and the wires are fixed, with a stress buffer inserted between the wires and the core wire.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube brush-like abrasive having a high deburring or polishing ability on the inner surface of an object to be treated, and to a method of deburring and polishing using the tube brush-like abrasive.

[0002]

2. Description of the Related Art Wire wires, nylon wires, or
A wire material in which abrasive grains are adhered to or contained in nylon is bound with a core wire, and the wire material is extended in the circumferential direction around the core wire to form a tube brush. Unlike abrasives that are implanted in brushes, they can be configured into thin shapes, have flexibility, are easy to manufacture, are relatively inexpensive, and can be used by hand or attached to machines, It can be easily inserted into a relatively narrow processing target such as a processing hole, and is widely used for deburring, polishing, and the like. Also, for burrs of pipe holes, for example, burrs of cross holes, an abrasive material in which diamond is electrodeposited on a metal base material having a thinned tip is mounted on a robot, and inserted into one of the cross holes, and the holes are crossed. Gently press against the burr generated by the polishing and remove it by rotating the abrasive so that it follows the hole while rotating, or cross-connect a brush-like abrasive that has several wires formed in a bellows shape and bound at both ends It was removed by pushing it into the hole and turning it gently.

[0003]

However, in the case of the above-mentioned tube-brush-shaped abrasive, a high-hardness work cannot be polished using a wire, and a relatively hard material such as aluminum, magnesium, copper, brass or the like is used. There was a problem that a soft work was scratched. Further, a wire rod in which abrasive grains are adhered to or contained in nylon has a problem that polishing power is low and wear is fast. Therefore,
For applications such as the above, the shape of the tube brush-like abrasive using a wire material is very suitable, but the deburring ability and the polishing ability are low, or the polishing surface is scratched, so that industrial use is required. However, there is a problem in using such a tube brush-like abrasive having a high deburring ability and a polishing ability and using a wire having a good finished surface. On the other hand, an abrasive obtained by curing alumina long fibers with a resin matrix such as an epoxy resin to obtain a linear shape is disclosed in
As disclosed in Japanese Patent Application Laid-Open No. 000-94344, etc., it is a well-known fact that the wire has a high deburring and polishing ability at the tip and a good finished surface. A tube brush-like abrasive using a wire has not been known. The reason is that the tube brush-shaped abrasive is usually arranged such that a wire of a fixed length is arranged almost perpendicular to the core between two or four cores, and the core is twisted to strengthen the wire. This is because, although it is tightened and fixed to form a tube brush, a portion of the wire rod made of alumina long fiber having low bending resistance was broken by the core wire and could not be manufactured. However, JP-A-4-3
As disclosed in US Pat. No. 36975 or the like, glass fiber, polyamide fiber, or the like is mixed in a filament unit or the outer periphery of a bundle of alumina long fibers is wrapped for the purpose of reinforcing and reinforcing the alumina long fiber wire. Although a method has been proposed, it is difficult in production to uniformly mix filaments, and a method of winding the outer periphery of a bundle of alumina long fibers is such that the fiber wound around the outer periphery is peeled off during polishing and the tip of the wire rod becomes uneven. As a result, there is a problem that the rigidity of the wire is lost and the polishing force is extremely reduced. Further, in the case of the abrasive material electrodeposited with diamond, there is a problem that although the abrasive material has a grinding force, the abrasive material is hard and returns burrs are generated, or the burrs are not evenly hit, and the burrs are left behind. . Further, in the case of a brush in which several wires are formed in a bellows shape and both ends are bound, since the burr is simply scraped off, the burr is returned and often left behind, which also has a problem. Therefore, an object of the present invention is to provide a tube brush-like abrasive made of alumina long fiber having a high deburring ability and a polishing ability and a good finished surface, and to easily form the inner surface of a work using the tube brush-like abrasive. It is intended to provide a deburring or polishing method.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above-mentioned object, and as a result, have prepared a tube brush-like abrasive using a wire in which alumina long fibers are bound with a resin matrix. In this case, the wire is fixed with a stress buffer material inserted between the core and the wire, a wire with a flat cross section is used, or alumina long fibers are bound with a resin matrix having rubber elasticity. By using knitted wire, or by knitting a braided body by combining an alumina filament and a filament or a staple yarn having higher bending resistance than alumina filament, the wire is strongly tightened between the core wire. It can be constructed as a tube-brush-shaped abrasive that does not break when it is broken, and can provide an easy deburring or polishing method for the inner surface of a work using the tube-brush-shaped abrasive. Was knowledge. The tube brush-like abrasive of the present invention is made based on such knowledge, and as described in claim 1, binds a wire with a core wire, and extends the wire in the circumferential direction around the core wire. A tube brush-shaped abrasive material comprising: a wire material obtained by binding alumina long fibers with a resin matrix as the wire material, and fixed with a stress buffering material interposed between the core wire and the core wire. And In the tube brush-shaped abrasive according to claim 2, the stress buffering material is chloroprene rubber, nitrile rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber, ethylene-propylene rubber, fluorine rubber, silicone rubber, or urethane rubber. It is characterized by comprising. The tube brush-like abrasive according to claim 3, wherein the wire is bound by a core wire, and the wire is extended around the core wire in a circumferential direction thereof. A feature of the present invention is that a wire rod is used in which alumina cross-sections are flattened by binding alumina long fibers with a resin matrix. The tube brush-like abrasive according to claim 4, wherein the wire is bound by a core wire, and the wire is extended around the core wire in a circumferential direction thereof. The present invention is characterized in that a wire rod in which alumina long fibers are bound with a resin matrix having rubber elasticity is used. According to a fifth aspect of the present invention, in the tube brush-like abrasive according to the fourth aspect, the resin matrix is chloroprene rubber, nitrile rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber, ethylene-propylene rubber. , Fluorine rubber, silicone rubber, or urethane rubber. 7. The tube brush-like abrasive according to claim 6, wherein the wire is bound by a core wire, and the wire is extended in the circumferential direction around the core wire, wherein the wire material The present invention is characterized in that a wire rod knitted into a braided body by combining an alumina long fiber and a long fiber or a staple yarn having higher bending resistance than the alumina long fiber is used, and using a resin matrix. According to a seventh aspect of the present invention, there is provided a tube brush-like abrasive according to any one of the first to sixth aspects, wherein the resin matrix includes hollow spherical beads. In addition, the tube brush-like abrasive according to claim 8 is the first to sixth aspects.
3. The tube brush-shaped abrasive according to any one of the above, wherein the resin matrix contains inorganic spherical solid beads. According to a ninth aspect of the present invention, in the tube brush-like abrasive according to any one of the first to eighth aspects, abrasive grains are contained in the resin matrix. According to a tenth aspect of the present invention, a deburring / polishing method is characterized in that deburring or polishing is performed using the abrasive according to any one of the first to ninth aspects.

[0005] In the above-described structure, the wire rod in which the alumina-based long fibers are bound by the resin matrix is maintained in a fixed state without breaking even when strongly tightened between the core wire and the high deburring. It is configured as a tube-brush-shaped abrasive having a capability and a polishing ability, and further, the inner surface of the work can be easily deburred or polished using the tube-brush-shaped abrasive. That is, a stress buffer is inserted between the core wire and the wire rod in which the alumina long fibers are bound by the resin matrix, or the cross-sectional shape of the wire rod in which the alumina long fibers are bound by the resin matrix is flat, Alumina long fibers are bound with a resin matrix having rubber elasticity to form a wire, or knitted into a braided body by combining alumina long fibers with long fibers or staple yarns that are more flexible than alumina long fibers. By using such a wire, it is possible to obtain a tube brush-shaped abrasive having high deburring ability and polishing ability and capable of easily deburring and polishing the inner surface of a work.

[0006] The reason is that, in the process of manufacturing the tube-brush-shaped abrasive, a wire in which alumina long fibers are bound with a resin matrix has low bending resistance, so a stress buffer is inserted between the wire and the core wire. To reduce the stress applied to the wire, to make the wire cross-sectionally flat, to bind the wire with a resin matrix having rubber elasticity, to form a wire, and to use alumina filaments and alumina filaments more resistant. By knitting into a braided body in combination with a highly flexible long fiber or staple yarn, the wire has high bending resistance, so it is fixed without breaking when strongly tightened with the core wire Therefore, it is possible to manufacture a tube brush-shaped abrasive. Furthermore, since the end of the wire rod in which the alumina long fibers are bound by the resin matrix has a high deburring and polishing ability, it is formed into a tube brush-like abrasive so that the inside of a pipe or a processing hole is relatively narrow. It was possible to easily remove the burrs and to exhibit the polishing performance by inserting it into the part.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The tube brush-like abrasive of the present invention is characterized in that a wire composed of alumina long fiber having a low bending resistance and a resin matrix can be used as a tube brush-like abrasive. The shape of the abrasive material can be thick or thin, the wire material becomes soft, and the tip of the wire material has high abrasion properties. From the shape, deburring and polishing of the inner surface of the work after machining etc. can be performed easily and reliably. It became so.

Specifically, a stress-buffer was inserted between a core wire and a wire composed of alumina long fibers and a resin matrix, and was sandwiched and fixed between the core wires to obtain a tube brush-shaped abrasive.

[0009] The cross section of a wire rod formed by binding alumina long fibers with a resin matrix may be made flat, or the alumina long fibers may be impregnated with a resin having rubber elasticity and cured into a linear shape. If knitting is performed by combining knitted filaments with long fibers or staple yarns that are more flexible than alumina-based filaments and have higher bending resistance, tighten with the core wire without using a stress buffer. We found that a tube-brushed abrasive could be manufactured without breaking.

[0010] The tube brush-shaped abrasive thus produced is particularly suitable for deburring of cross holes when a cross hole is drilled in a work, polishing the inner surface of a pipe, and the like. Depending on the thickness and length of the core wire,
The tube-brush-shaped abrasive can be relatively freely manufactured in large, small, thick and fine sizes, and can be inserted from a large-diameter hole to a small-diameter hole and deep even if the hole is bent.

In the case where the burr is large or the required surface roughness of the polished surface is rough but efficiency is required, the alumina long fiber is formed into a wire by using a relatively hard resin matrix such as epoxy resin, and the cushion is formed. The material is sandwiched between the core wire and fixed, or the cross-sectional shape of the wire is flat, or a combination of alumina long fibers and long fibers or staple yarns having higher bending resistance than alumina long fibers. It may be knitted into a braided body.

When the burr is small or the required surface roughness of the polished surface is small, a rubber elastic resin matrix may be used. Furthermore, if the cross-sectional shape of the wire is flattened or knitted into a braided body by combining an alumina long fiber and a long fiber or a staple yarn having higher bending resistance than the alumina long fiber, the bending resistance of the wire is improved. Since the property is improved, the cushion material is unnecessary between the core wire and can be directly sandwiched and fixed. When knitting into a braided body by combining an alumina long fiber and a long fiber or a staple yarn having higher bending resistance than the alumina long fiber, even if fibers having different properties are combined, the wire is integrated by forming a braided body. In addition, the polishing force does not drop due to the tip being broken during polishing. As long fibers having higher bending resistance than alumina long fibers, for example, glass fibers for inorganic fibers, polyamide fibers, polyimide fibers, PVA fibers, nylon fibers, polyester fibers, acrylic fibers for organic synthetic fibers, and silk fibers for natural fibers. Examples of the staple yarn include cotton staple yarn and wool staple yarn. Also, the above-mentioned stress buffering material is inserted, or the cross section of the wire is flattened,
Knitting into a braided body by using a rubber elastic resin matrix or combining with a long fiber or a staple yarn having high bending resistance may be used in combination.

Also, aluminum, magnesium, copper,
When deburring and polishing relatively soft materials such as brass, clogging can be prevented by inserting hollow and solid beads (spherical) into the wire, and hollow beads (spherical)
When the wire is inserted, the wire is relatively flexible and soft, and when the solid beads (spherical) are inserted, the wire becomes stiff and has high polishing properties.

When deburring and polishing a relatively hard material exceeding the HRC 50, abrasives such as diamond and boron carbide may be contained in the fine wire.

[0015]

EXAMPLES Example 1 Alumina long fibers (Al ₂ O ₃ ) consisting of 1000 monofilaments having a fiber diameter of 10 μm
100 parts by weight of an epoxy resin (Epicoat 828 oiled shell epoxy) and 3 parts by weight of boron trifluoride monoethylamine (Stella Chemifa) were added to a roving of 85% by weight and 15% by weight of SiO ₂ , and the mixture was thoroughly stirred and mixed. The product was wound on a bobbin with a winder while continuously impregnating with a roller. The bobbin of the wound impregnated strand is attached to a creel, and the drawn-out impregnated strand is continuously passed through a curing furnace having a length of 2 m in an atmosphere heated to about 300 ° C. at a speed of 1.6 m / min. After hardening, it was wound up by a winding device and cut into a length of 30 mm to obtain a wire. Furthermore, a silicone rubber sheet (thickness 0.5 mm, between the two cores and the wires arranged almost perpendicular to the cores)
(Width 3 mm, length 100 mm) along the core wire,
A twist was applied to the core wire, and the wire was strongly tightened and fixed via a silicone rubber sheet to obtain a tube brush-like abrasive shown in FIG. FIG. 2 shows a state before a twist is applied to the core wire.
0 indicates a core material.

[0016] (Example 2) alumina long fiber consisting of 1000 monofilament fiber diameter of 10 [mu] m _(Al 2 0
₃ 85 wt%, _SiO 2 15 wt%) and epoxy resin (Epikote 828 produced by Yuka Shell Epoxy) 100 parts by weight of roving, to which a boron trifluoride monoethylamine (Stella Chemifa) 3 parts by weight was added, stirred well The mixture was wound around a bobbin with a winder while continuously impregnating with a roller. The bobbin of the wound impregnated strand was attached to a creel, and the drawn impregnated strand was placed in a rectangular hole (die) heated to about 300 ° C. and having a height of 0.1 mm, a width of 0.5 mm, and a length of 5 cm. After passing continuously at a speed of 6 m and hardening and molding so that the cross-sectional shape becomes flat, it was wound up by a winding device and cut into a length of 30 mm to obtain a wire. Further, the wire was arranged between the two cores so as to be substantially perpendicular to the cores, the cores were twisted, and the wires were strongly tightened and fixed to obtain a tube brush-shaped abrasive.
FIG. 3 shows a state before the core wire is twisted. In FIG. 3, 1 indicates a wire, and 10 indicates a core.

[0017] (Example 3) alumina long fiber consisting of 1000 monofilament fiber diameter of 10 [mu] m _(Al 2 0
₃ 85% by weight, 15% by weight of SiO ₂ ), 7% by weight of a curing agent (Cat-RG Shin-Etsu Chemical Co., Ltd.) is added to the silicone rubber base (KE1202 Shin-Etsu Chemical Co., Ltd.), and sufficiently stirred and defoamed. The obtained product was wound on a bobbin with a winder while continuously impregnating with a roller. The bobbin of the wound impregnated strand is attached to a creel, and the drawn-out impregnated strand is continuously passed through a curing furnace having a length of 2 m in an atmosphere heated to about 300 ° C. at a speed of 1.6 m / min. After it has hardened, it is wound up on a winding device, and it is 30 mm long.
The wire cut into pieces was used as a wire. Further, the wire was arranged between the two cores so as to be substantially perpendicular to the cores, the cores were twisted, and the wires were strongly tightened and fixed to obtain a tube brush-shaped abrasive. FIG. 4 shows a state before the core wire is twisted. In FIG. 4, 1 indicates a wire, and 10 indicates a core.

[0018] (Example 4) alumina long fiber consisting of 1000 monofilament fiber diameter of 10 [mu] m _(Al 2 0
₃ 85% by weight, 15% by weight of SiO ₂ ) were wound around three bobbins and wound on a braiding machine, and further, glass fiber yarn (ECG751 / 0) was provided at the center.
0.7Z Asahi fiberglass) A braided body was prepared while arranging one piece as a core material. An epoxy resin (Epicoat 828 oiled shell epoxy) 10
0 parts by weight and 3 parts by weight of boron trifluoride monoethylamine (Stella Chemifa) were added and mixed well with stirring.
It was wound up on a bobbin with a winder while continuously impregnating with a roller. The bobbin on which the resin-impregnated braid was wound was attached to the creel, and the drawn braid was continuously passed through a 2 m long curing furnace heated to about 300 ° C. at a speed of 1.6 m / min. After hardening to a fine wire shape, it is wound up by a winding device, and the length is 30 mm.
The material cut into mm was used as a wire. Further, the wires were arranged so that the cores were almost perpendicular to each other between the two cores, the cores were twisted, and the wires were strongly tightened and fixed to obtain a tube brush-shaped abrasive. FIG. 5 shows a state before the core wire is twisted. In FIG. 5, reference numeral 1 denotes a wire, 3 denotes a core of the wire 1, and 10 denotes a core. FIG. 6 shows the wire 1
FIG. 3 is an enlarged perspective view of a state in which the periphery of the core material 3 is removed to show the core material 3.

(Comparative Example 1) A tube brush-shaped abrasive (Takashima Sangyo) using a wire as a wire was prepared and used as an abrasive in Comparative Example 1.

(Comparative Example 2) A tube brush-like abrasive made of nylon wire (Takashima Sangyo) was prepared and used as an abrasive in Comparative Example 2.

(Comparative Example 3) A tube brush-like abrasive (Takashima Sangyo Co., Ltd.) made of nylon containing abrasive grains WA # 400 was prepared and used as an abrasive of Comparative Example 3.

Table 1 below shows a deburring test for each of the brush-like abrasives obtained in Examples 1, 2, 3, and 4 and Comparative Examples 1, 2, and 3 after processing aluminum cross holes. The results are shown below. That is, a tube brush-like abrasive having a diameter slightly larger than the diameter of the cross hole is inserted by hand from one side of the cross hole, rotated half a turn left and right, and then pulled out. It was confirmed. The results are shown in Table 1.

[0023]

【table 1】

Table 2 shows that stainless steel pipes (polished front surface roughness Ra = 1.3) were used for the respective tube brush-shaped abrasives obtained in Examples 1, 2, 3, and 4 and Comparative Examples 1, 2, and 3.
(0 μm, Rmax = 11.0 μm) showing the surface roughness when the inner surface is polished. That is, a tube brush-like abrasive having a diameter slightly larger than the inner diameter of the pipe is mounted on the rotating tool, inserted into the pipe, and then subjected to 1000 r.p.m. p. After polishing by rotating at m, the polished portion was measured by a surface roughness meter.

[0025]

[Table 2]

As is clear from the above Tables 1 and 2, it was confirmed that the tube-brush-shaped abrasive of the example of the present invention was extremely excellent in deburring and polishing properties as compared with the abrasive of the comparative example. did it.

[0027]

As described above, according to the present invention, a tube brush-like abrasive having a high deburring ability and a polishing ability and having a good finished surface is produced by using alumina long fibers as a wire in a resin matrix. The present invention provides a method for easily deburring and polishing the inner surface of a work using the tube brush-shaped abrasive.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of a tube brush-like abrasive of the present invention.

FIG. 2 is an enlarged sectional view of a main part showing a manufacturing process of the embodiment.

FIG. 3 is an enlarged sectional view of a main part showing a manufacturing process of another embodiment of the tube brush-shaped abrasive of the present invention.

FIG. 4 is an enlarged sectional view of a main part showing a manufacturing process of still another embodiment of the tube brush-like abrasive of the present invention.

FIG. 5 is an enlarged sectional view showing a main part of a tube brush-shaped abrasive according to another embodiment of the present invention.

FIG. 6 is an enlarged perspective view of the wire material of the tubular abrasive.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wire 2 Stress relaxation material 3 Core material 10 Core wire

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor: Shun Matsushita 3385-2, Minamiminowa-mura, Minamiminawa-mura, Kamiina-gun, Nagano BB02 BB03 BB04 BB11 BC04 BD05 BF02 BF03 BG03 BG11 BH03 CC02 EE29 FF08

Claims (10)

[Claims] 1. A tube-brushed abrasive obtained by binding a wire with a core wire and extending the wire in the circumferential direction around the core wire, wherein the filamentous alumina fiber is a resin matrix as the wire. A tube-brush-shaped abrasive material, wherein a fixed wire material is used and fixed with a stress buffering material interposed between the core wire and the core wire. 2. The stress buffer according to claim 1, wherein the stress buffer comprises chloroprene rubber, nitrile rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber, ethylene-propylene rubber, fluorine rubber, silicone rubber, or urethane rubber. 2. The tube brush-shaped abrasive according to 1. 3. A tube brush-like abrasive obtained by binding wires to a core wire and extending the wires in the circumferential direction around the core wire, wherein the filamentous alumina fibers are a resin matrix as the wire material. A tube-brush-shaped abrasive material which uses a wire that is bound and has a flat cross-sectional shape. 4. A tube-brush-like abrasive obtained by binding a wire with a core wire and extending the wire in the circumferential direction with the core wire as a center, wherein the wire rod has an alumina long fiber having rubber elasticity. A tube brush-shaped abrasive, wherein a wire material bound by a resin matrix having the same is used. 5. The resin matrix according to claim 4, wherein said resin matrix is made of chloroprene rubber, nitrile rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber, ethylene-propylene rubber, fluorine rubber, silicone rubber, or urethane rubber. A tube brush-like abrasive according to the above. 6. A tube brush-like abrasive obtained by binding a wire with a core wire and extending the wire in the circumferential direction with the core wire as a center, wherein the wire material includes an alumina filament and an alumina filament. Knit into a braided body by combining one or more types of long fibers or staple yarns that are more flexible than the fibers,
A tube brush-like abrasive material using a wire material bound by a resin matrix. 7. The tube-brushed abrasive according to claim 1, wherein the resin matrix contains hollow spherical beads. 8. The tube brush-shaped abrasive according to claim 1, wherein said resin matrix contains inorganic spherical solid beads. 9. The tube brush-like abrasive according to claim 1, wherein abrasive grains are contained in the resin matrix. 10. A deburring / polishing method, wherein deburring or polishing is performed by using the abrasive according to claim 1. Description: