JP2002045235A - Flat cup brush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat cup brush having a structure capable of enhancing its polishing performance. SOLUTION: The flat cup brush comprises a bristle block 2 on which a number of bristles 1 cut into a certain length are arranged in the form of a flat ring, and a ring-shaped resin base 3. The resin base 3 comprises bristle setting portions 5 in which the rear ends of the bristles 1 are buried; fiber reinforced portions 6 leading to the bristle setting portions 5; and a plurality of protrusions 7 provided in circumferentially equally spaced relationship on the lower surface of the resin base for connecting with a polisher mounting seat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat cup brush used for precision finishing such as cylindrical or planar polishing or deburring.

[0002]

2. Description of the Related Art Conventionally, flat cup brushes in this field include a "channel type" in which a channel brush is formed into a ring or spiral shape and welded to a metal pedestal. "Implanted type" in which a small hole is made in a ring shape and a bristle bundle is implanted, and an "adhesive flocking" in which an adhesive resin is applied to a metal plate, etc. The "type" is known. All of these conventional flat cup brushes require less precision than grindstones and sandpaper, or have been used only for materials that are easy to polish.

[0003]

However, in recent years, the brush type polishing tool has been reexamined in accordance with the trend of automation of polishing finish and the expansion of the use of hard-to-polish materials such as titanium materials. Dissatisfaction with conventional cup brushes has also increased. In recent years, brush type polishing tools have been reviewed for their flexibility and remarkably excellent wear resistance as compared with grindstones and sandpaper.
On the other hand, the biggest drawback is that the polishing performance is low.In recent years, not only this problem, but also because the used brush is a bulky foreign body composite such as a metal base and a bristle material,
There was a problem that landfilling as well as incineration was troublesome.

[0004] One of the generally considered means for improving the polishing performance of a flat cup brush is to improve the polishing performance of the bristle material, which involves changing the abrasive grains contained in the bristle to diamond. Is most effective. However,
Diamond abrasives are 100 times more expensive than general abrasives such as alumina and silicon carbide, so cut the tip after bending the bristle like "channel type" or "implanted type" In the (shearing) method, material loss is large, and the price is increased, so that it is hardly acceptable in the market.

A second means for improving the polishing performance of the flat cup brush is to increase the number of revolutions of the cup brush, but safety is the most important problem. In other words, the “channel type” may cause vibration destruction or failure of welds due to difficulty in balancing the brush dynamics, while the “adhesive flock type” may lose the bristle material and adhere to the base. High possibility of peeling. In the case of the "adhesive flocking type", it should be particularly noted that the more the adhesive in the flocking portion is increased in order to prevent the bristle material from coming off, the more easily the adhesive peels off from the pedestal. This is not simply due to the problem of the adhesive strength, but due to the shearing force generated on the bonding surface due to the difference in the coefficient of thermal expansion between the pedestal and the adhesive.

The third means for improving the polishing performance of the flat cup brush is to increase the flock density of the bristle material. However, the "channel type" and the "implant type" have limitations in the production method, and the "adhesive flocking" The "mold" is a concern for peeling, and this also has its limits.

[0007] The present invention has been made in view of the above problems, and has as its object to provide a flat cup brush having a structure capable of improving polishing performance.

[0008]

According to the first aspect of the present invention, there is provided a bristle material block in which a number of bristle materials cut to a predetermined length are arranged in a flat ring shape. A resin base, the resin base is a flocked portion in which the base end of the bristle material is buried, and a fiber reinforced portion connected to the flocked portion,
A flat cup brush comprising a plurality of protrusions on a lower surface, which are provided at equal intervals in a circumferential direction and are connected to a polishing machine mounting base.

The invention according to claim 2 is the flat cup brush according to claim 1, wherein the bristle material block is divided into a plurality of blocks in a circumferential direction.

The invention according to claim 3 is the flat cup brush according to claim 2, wherein the width of the dividing groove between the blocks is 0.5 to 10 mm.

Further, the invention according to claim 4 is the flat cup brush according to claim 1, wherein the flocked portion has a burial depth of 1 to 10 mm of the bristle material.

The invention according to claim 5 is the flat cup brush according to claim 1, wherein the fiber reinforced portion of the resin base has a thickness of 1 to 10 mm.

[0013]

According to the flat cup brush of the present invention constructed as described above, since the bristle material cut into a fixed length is planted in the planted portion, it can be used as a "channel type" or a "planted type". There is no need for shaving to trim the ends of the bristle to a plane. Therefore, there is almost no loss of hair material,
It enables the use of bristle material with diamond abrasive grains, which is expensive but has excellent wear resistance. In addition, since the flocking portion is integrated with the fiber reinforced portion having excellent tensile strength of the resin base, the flocking density can be increased, and at the same time, the flocking may occur due to high-speed rotation, and the flocking portion may peel. Can be lost.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The flat cup brush of the embodiment is configured as shown in FIGS. 1 to 3 and includes a bristle block 2 composed of a large number of bristle materials 1 and a disk-shaped resin base 3. Have been. As described below, the bristle material block 2 has a large number of bristle materials 1 cut into a fixed length, and the tip (free end) is formed.
Are arranged in a flat ring shape in a plane. Figure 1
As shown in FIG.
Is divided into a plurality of (16) blocks 2a in the circumferential direction, and a dividing groove 4 is formed between each block 2a.

On the other hand, the resin base 3 has a flocked portion 5 in which the base ends of the bristle material 1 constituting the bristle material block 2 are buried, a fiber reinforced portion 6 connected to the flocked portion 5, and a lower surface. A plurality of projections 7 provided at equal intervals in the circumferential direction are integrally formed. As shown in FIG. 4, the protruding portion 7 is for connecting to the polishing machine mounting base 8, has a small disk shape, and is screwed so that a hexagonal hole bolt 9 can be screwed into the center. A hole 10 is formed.

The bristle material 1 contains nylon 12 as a main component and contains 15% by weight of diamond abrasive grains, and has a thickness of 0.5 mm and a length of 15 mm. The form of the bristle material block 2 is divided into a plurality of blocks 2a as described above, the height is 10 mm, the length of the arc L (FIG. 1) of each block 2a is 20 mm, and the width of the dividing groove 4 is 1.5 mm.

The resin base 3 is formed of an epoxy resin, and the base portion of each bristle material 1 is attached to the flocked portion 5 by 5.
mm. Further, the fiber reinforced portion 6 was formed by laminating a plurality of PET cold gauze sheets and overmolding them to have a thickness of 5 mm. The protrusion 7 on the lower surface has a diameter of 20 mm and a height of 2 m.
m were formed at equal intervals.

In the flat cup brush constructed as described above, as shown in FIG. 4, the projection 7 provided on the resin base 3 is fitted into the counterbore portion 11 of the polishing machine mounting base 8, and the polishing machine mounting base is mounted. The hexagonal hole bolt 9 inserted from the back side of 8 can be connected to the screw hole 10 of the projection 7 and can be easily and firmly attached. The eccentricity of the flat cup brush is prevented by fitting the center hole 12 of the fiber reinforced portion 6 and the center projection 13 on the polishing machine mounting base 8 side, and the rotation of the flat cup brush and the polishing machine mounting base 8 in the rotational direction is shifted. Can be prevented by the engagement between the projection 7 and the counterbore 11.

Since the fiber reinforced portion 6 of the resin base 3 has only to have a tensile strength that can withstand the centrifugal force of rotation, the fiber reinforced portion 6 can be made extremely lightweight with a minimum necessary thickness. Since the pedestal 8 and the flat cup brush are also highly integrated, dynamic balance during high-speed rotation can be made very easy.

As described above, the polishing performance is enhanced by incorporating diamond abrasive grains in the bristle material 1 and there is no danger of the bristle material 1 being detached by the high-speed rotation and the flocked portion 5 being peeled off. Can be used below. Then, a brush in which the flocking density of the bristle material 1 is increased and the polishing performance is enhanced can be configured.

Further, the flat cup brush of this embodiment is lightweight and made entirely of combustible material, so that the used brush can be easily removed from the polishing machine mounting base 8 and burned. Because it can be disposed of, it can also contribute to environmental issues.

In order to improve the polishing performance, it is necessary to divide the polishing material like a block 2a and arrange it in a ring shape.
It is generally known for whetstones and the like. However, in the case of a brush, even if it is simply made into a block, the effect is not exhibited, but rather an adverse effect often occurs. This is because the abrasive material has a special form of hair material.

According to the result of the study, it was found that if the width of the dividing groove 4 was less than 0.5 mm, the effect of blocking could not be expected so much. The width of the dividing groove 4 is 10 mm.
It was found that when the ratio exceeded the limit, the bristle material 1 was scratched and the polishing unevenness became severe. The preferred width was 1 to 5 mm, and the most preferred width was 1.5 to 3 mm. On the other hand, when the length of the arc L is less than 8 mm, the block 2a is slanted as a whole and the polishing force is reduced. Conversely, when the length is more than 60 mm, the effect of blocking is not expected.
The preferred length L is between 10 and 40 mm, most preferably 1
5 to 30 mm. As described above, the preferable range of the form of the bristle block 2 is narrow, and it is presumed that it was difficult to realize the bristle block 2 by the conventionally known manufacturing method and structure of the flat cup brush.

The material, length, thickness and the like of the bristle material 1 were also examined. The material of the bristle material 1 can use a high-molecular polymer, but a thermoplastic polymer is preferable, and it is understood that aliphatic and meta-aromatic polyamides are most preferable in consideration of folding resistance and abrasion resistance. Was. Length is 5-55mm
Had to be done. If it is less than 5 mm, the function as a brush will be lost, and if it exceeds 55 mm, the hair will fall due to the centrifugal force of rotation, and the polishing function will decrease. Preferably 10-30
mm, and most preferably 15 to 20 mm.
Further, the thickness had to be 0.05 to 5 mm.
It was found that when the thickness was less than 0.05 mm and more than 5 mm, the function as a brush was lost. Preferably 0.1 to 1 m
m, and most preferably 0.2 to 0.6 mm.

The abrasive grains contained in the bristle material 1 can include any abrasive grains such as diamond, silicon carbide, and alumina. Needless to say, diamond is optimal for improving the polishing performance. The content is 0 to 50% by weight. When the purpose of use is cleaning or polishing, abrasive grains need not be contained. If it exceeds 50% by weight, hair material 1
Is easily broken. Preferably it is 1 to 40% by weight, most preferably 5 to 30% by weight.

As the resin of the resin substrate 3, a synthetic resin having high adhesive strength, heat resistance, hardness and glass transition point is used. It is preferably a thermosetting resin, and most preferably an epoxy resin. The depth of the flocking portion 5 formed on the resin base 3 is preferably in the range of 1 to 10 mm. If it is less than 1 mm, the bristle material 1 may fall off. If it exceeds 10 mm, the cost increases when using an expensive bristle material such as a bristle material containing diamond abrasive grains. Preferably it is 2 to 7 mm, most preferably 3 to 6 mm. The length of the bristle material includes the length of the flocked portion 5. Therefore, the preferred range of the height of the bristle material block 2 is 3 to 50 mm.
If it is less than 3 mm, it will lose its function as a brush and
If it exceeds m, the hair will fall due to the centrifugal force of rotation, and the polishing function will decrease. Preferably it is 5 to 30 mm, most preferably 7 to 15 mm.

The strength, uniformity, and resin impregnation of the reinforcing fibers used in the fiber reinforcing portion 6 of the resin base 3 are important. Woven fabrics are preferred, most preferably cold gauze. 2-3 sheets /
It is desirable to arrange them in mm. The thickness of the fiber reinforced portion 6 is in the range of 1 to 10 mm. If it is less than 1 mm, it is difficult to maintain a strength to withstand the centrifugal force. Also, it can be said that 10 mm is a necessary and sufficient thickness in terms of strength. Preferably it is 2 to 7 mm, most preferably 3 to 6 mm.

Finally, a plurality, preferably 3 to 16, of the protrusions 7 provided on the lower surface of the resin substrate 3 are arranged at regular intervals in the circumferential direction, and the diameter is set in a range of 5 to 50 mm. 5
If it is less than mm, there is a risk of shear breaking due to polishing resistance.
50 mm is a necessary and sufficient size for strength. Preferably 10-30 mm, most preferably 15-25 mm
It is. The height of the projection 7 is 0.5 to 10 mm.
If it is less than 0.5 mm, there is a possibility that it comes off from the counterbore portion 11 of the polishing machine mounting base 8. 10 mm is a necessary and sufficient height for strength. Preferably it is 1-5 mm, most preferably 2-3 mm.

[0030]

As described above, according to the first aspect of the present invention, it is possible to use a bristle material containing diamond abrasive grains excellent in abrasion resistance without increasing the cost. Since no hair breakage or peeling of the portion occurs, it is possible to provide a flat cup brush which can be used at a high rotation speed and can improve the polishing efficiency.

According to the second aspect of the present invention, it is possible to improve the polishing effect known with a grindstone or the like with a brush, and to provide a flat cup brush with further improved polishing performance.

According to the third aspect of the present invention, it is possible to provide a flat cup brush in which the effect of dividing the bristle material block is ensured, and vibration brittle peculiar to the bristle material does not occur and polishing unevenness does not occur. .

According to the fourth aspect of the present invention, it is possible to provide a flat cup brush that can prevent the bristle from coming off and can minimize the cost when using an expensive bristle.

According to the fifth aspect of the present invention, it is possible to provide a flat cup brush having a necessary and sufficient strength to withstand a centrifugal force.

[Brief description of the drawings]

FIG. 1 is a plan view of a flat cup brush according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line AA of FIG.

FIG. 3 is a bottom view of the flat cup brush of the embodiment.

FIG. 4 is a cross-sectional view similar to FIG. 2 in a state where the flat cup brush of the embodiment is mounted on a polishing machine mounting base.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bristle material 2 Bristle material block 2a Divided block 3 Resin base 4 Dividing groove 5 Flocked part 6 Fiber reinforced part 7 Projection part 8 Polishing machine mounting base 9 Hexagon hole bolt 10 Screw hole 11 Counterbore part 12 Central hole of resin reinforced part

Claims (5)

[Claims] 1. A bristle material block 2 in which a large number of bristle materials 1 cut to a predetermined length are arranged in a flat ring shape, and a ring-shaped resin base 3. A plurality of flocked portions 5 whose base ends are buried, a fiber reinforced portion 6 connected to the flocked portions 5, and a plurality of lower surfaces, which are provided at equal intervals in the circumferential direction and are provided with polishing machine mounting bases 8. A flat cup brush comprising: 2. The flat cup brush according to claim 1, wherein the bristle material block 2 is divided into a plurality of blocks 2a in a circumferential direction. 3. The width of the dividing groove 4 between the blocks 2a is
3. The flat cup brush according to claim 2, which is 0.5 to 10 mm. 4. The flocked portion 5 has a burial depth of 1 to 1
The flat cup brush according to claim 1, which is 10 mm. 5. The flat cup brush according to claim 1, wherein the fiber reinforced portion 6 of the resin base 3 has a thickness of 1 to 10 mm.