JP3474543B2 - Method for manufacturing resin bonded superabrasive wheel - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin-bonded superabrasive wheel and a method for manufacturing the same. More specifically, the present invention does not include bubbles in the resin bond portion, has a high density, is excellent in sharpness, has a long life, and does not require a resin bond superabrasive wheel, and an expensive die or molding machine, The present invention relates to a method for manufacturing a resin bond superabrasive wheel having a high degree of freedom.

[0002]

2. Description of the Related Art Resin bonding, vitrified bonding, metal bonding, electrodeposition and the like are used as a method for fixing superabrasive particles in a superabrasive wheel. Resin bond is
Good sharpness but low durability. Vitrified bonds have good sharpness and good wear resistance, but are brittle and easily chipped. The metal bond is excellent in abrasive grain retention and wear resistance, but internal stress is generated in the superabrasive grains, and the abrasive grains are likely to break or chip. Electrodeposition has a large degree of freedom in shape and good sharpness, but superabrasive grains are only mechanically retained by plating. Therefore, in the superabrasive grain wheel, a method of fixing the superabrasive grains is selected according to the application. For example, in a superabrasive grain wheel for a stone polishing machine, a metal bond superabrasive grain wheel using superabrasive grains having a grain size of about 50 to 400 is used as a wheel for rough finishing and intermediate finishing, and for a fine finishing. As a wheel, a resin bond superabrasive grain wheel using superabrasive grains having a grain size of about 400 to 3,000 is used. In general,
The finer the grain size of the superabrasive grains, the better the surface roughness, but the sharper and longer the life, the longer the grain size. Resin bond superabrasive wheel is a method of mixing powder of binder such as phenol resin, polyimide resin and superabrasive, or coating the superabrasive with a binder and filling the die with a press molding. Alternatively, it is manufactured by a method in which a liquid binder such as an epoxy resin or an unsaturated polyester resin is mixed with superabrasive grains, and the mixture is poured into a mold and cured. For example, Japanese Patent Publication No. 2-5
As a method for manufacturing a grindstone suitable for heavy grinding and processing of difficult-to-cut materials, 3196 discloses that abrasive grains coated with a conductive metal are mixed with a polymer binder and filled in a mold, and heated to a constant temperature. A method of forming a grindstone body by repeating a pressurized state and a pressure released state a plurality of times while controlling the gas content to release the contained gas and plastically deforming and adhering the coating metal of the abrasive grains has been proposed. However, the hot pressing method has a problem that an expensive die and a molding machine are required, the degree of freedom in shape is low, and it is difficult to form a complicated shape. Japanese Examined Patent Publication No. 7-47267 discloses a method for producing a foamed abrasive having both the properties of a grinding wheel and a polishing cloth paper, together with an unsaturated polyester resin, a cross-linking agent, a curing agent, abrasive grains, a foaming agent, and a heat treatment. A method of foam-curing a mixture containing a curable resin has been proposed. In addition, JP-A-11-156
Japanese Patent No. 725 discloses, as a resinoid grinding wheel with low grinding resistance and low grinding resistance while maintaining a low elastic modulus and abrasive grain holding force, 25 volume parts of alumina abrasive grains and an organic hollow having an average particle diameter of 80 μm. A resinoid grinding wheel has been proposed in which 20 parts by volume of a body and 10 parts by volume of pores having a diameter of 1 mm are dispersed in 40 parts by volume of an epoxy curable resin binder. However, although the method using a liquid binder is inexpensive in equipment and has a high degree of freedom in shape, sufficient hardness cannot be obtained as a binder for superabrasive grains. In addition, the density is not sufficient for the inclusion of air bubbles, and as in the above-mentioned publication, it is often used for manufacturing a grinding tool in which the inclusion of air bubbles such as a foamed abrasive body and a grindstone containing a hollow body does not pose a problem.

[0003]

DISCLOSURE OF THE INVENTION The present invention requires a resin bond superabrasive grain wheel which does not contain bubbles in the resin bond portion, has a high density, is excellent in sharpness, and has a long life, and an expensive die or molding machine. In other words, the object is to provide a method for manufacturing a resin-bonded superabrasive wheel having a large degree of freedom in shape.

[0004]

As a result of intensive studies to solve the above problems, the present inventors have found that a mixture containing a liquid thermosetting resin, a curing agent, superabrasive grains and a filler, After stirring and defoaming treatment by imparting orbital motion and rotation motion, the mixture is cast and cured at room temperature, preferably by further heating for secondary curing treatment.
It was found that a resin-bonded superabrasive wheel having a performance equal to or higher than that of the hot pressing method can be manufactured with the same ease as the casting method, and the present invention has been completed based on this finding. That is, the present invention includes (1) filling a container with a mixture containing a liquid thermosetting resin, a curing agent, superabrasive grains and a filler, and stirring the container by imparting revolving motion and rotation motion , Give orbital motion
After defoaming by Rukoto, after curing at room temperature the mixture was cast, the method of manufacturing resin bonded superabrasive wheels, characterized in that the secondary curing treatment at 80 to 200 ° C.,
And (2) the liquid thermosetting resin is an unsaturated polyester resin or
The resin bond according to claim 1, wherein is a vinyl ester resin
A method of manufacturing a superabrasive wheel is provided. Furthermore, as a preferred aspect of the present invention, ( 3 ) the resin bond superabrasive wheel according to claim 1, wherein the mixture containing the liquid thermosetting resin, the curing agent, the superabrasive grains and the filler contains an accelerator. Manufacturing method, ( 4 ) The viscosity of the liquid thermosetting resin at 25 ° C. is 0.
1 to 10 Pa · s, the method for producing a resin-bonded superabrasive grain wheel according to item 1, ( 5 ) the rotational speed of the revolution motion during stirring is 1,000 to
4,000 min ^-1 , and the rotation speed of rotation is 4
The method for producing a resin-bonded superabrasive wheel according to item ^1, which is from ⁰ to 1,600 min ⁻¹ , and ( 6 ) the rotational speed of the revolution motion during defoaming is from 1,000 to
The method for producing a resin-bonded superabrasive grain wheel according to the first aspect is 4,500 min ⁻¹ .

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The resin-bonded superabrasive wheel of the present invention is agitated by imparting a revolution movement and a rotation movement to a mixture containing a liquid thermosetting resin, a hardening agent, superabrasive particles and a filler. Then, it is a superabrasive grain wheel obtained by defoaming by imparting orbital motion, then casting the mixture and curing at room temperature.
More preferably, it is a superabrasive wheel that has been secondarily hardened at 00 ° C. In the resin-bonded superabrasive wheel of the present invention, a liquid thermosetting resin, a curing agent, a mixture of superabrasive particles and a filler is filled in a container, and the container is revolved and rotated to stir the mixture, After orbiting the mixture to defoam the mixture, the mixture is cast, cured at room temperature, and secondarily cured at 80 to 200 ° C. The liquid thermosetting resin used in the present invention is not particularly limited, and examples thereof include diallyl phthalate resin, vinyl ester resin, unsaturated polyester resin, epoxy resin, xylene resin, phenol resin, resorcinol resin, and acrylic resin. it can. Among these, unsaturated polyester resin and vinyl ester resin can be used particularly preferably. The unsaturated polyester resin and the vinyl ester resin can be used alone or in a mixture of both. The curing agent used in the present invention can be appropriately selected according to the liquid thermosetting resin used. For example, for diallyl phthalate resin, vinyl ester resin and unsaturated polyester resin, organic peroxide or the like can be used as a curing agent, and for epoxy resin, amine, as a curing agent,
Polyaminoamide, acid anhydride, dicyandiamide and the like can be used.

The unsaturated polyester resin is obtained by heating esterification of glycol with unsaturated polybasic acid or saturated polybasic acid, and is usually dissolved in monomers such as styrene which can be copolymerized with unsaturated bond. It is commercially available at. The unsaturated polyester resin used in the present invention is not particularly limited, and examples thereof include general-purpose resins synthesized from ethylene glycol, propylene glycol, maleic anhydride, phthalic anhydride, propylene glycol, 2,2-bis
Chemically resistant resin synthesized from [4- (hydroxypropoxy) phenyl] propane, phthalic anhydride, itaconic acid, etc., tetrachloro-1,4-bis (hydroxymethyl) benzene, tetrachlorophthalic anhydride, chlorendic anhydride Flame-resistant resin synthesized from materials, flexible resin synthesized from diethylene glycol, adipic acid, sebacic acid, propylene glycol, neopentyl glycol, 2,2,4-trimethyl-1,3-pentanediol, isophthalate Examples thereof include high hardness and scratch resistant resins synthesized from acids, phthalic anhydride, maleic anhydride and the like. Of these, a resin having high hardness and scratch resistance can be particularly preferably used. Vinyl ester resin is a resin obtained by reaction of epoxy resin and (meth) acrylic acid, sequential reaction of (meth) acryloyl group-containing monoalcohol and polybasic acid anhydride and epoxy resin, reaction of glycidyl methacrylate and bisphenols, etc. It is also referred to as an epoxy acrylate, and is usually commercially available in a state of being dissolved in a monomer such as styrene which can copolymerize with an unsaturated bond. Epoxy resins used in the production of vinyl ester resins usually have a molecular weight of 350-
It is 1,000 bisphenol A type epoxy resin.

In the present invention, examples of the curing agent for the unsaturated polyester resin or the vinyl ester resin include methyl ethyl ketone ketone, cyclohexanone peroxide, methyl acetoacetate peroxide, acetylacetone peroxide, cumene hydroperoxide and the like. be able to. These curing agents can be used alone or in combination of two or more. In the present invention, examples of the accelerator used in combination with these curing agents include organic acid salts of cobalt such as cobalt naphthenate and cobalt octylate. In the present invention, a co-promoter can be further used if necessary. Examples of the promoter include β-diketones such as N, N-dimethylacetoacetamide, acetylacetone, dimedone, dibenzoylmethane, 2-acetylcyclopentanone and methyl acetoacetate, and aromatic compounds such as dimethylaniline and dimethyltoluidine. A tertiary amine etc. can be mentioned. By using a co-promoter, the curing speed at room temperature can be further increased. In the present invention, the viscosity of the liquid thermosetting resin at 25 ° C. is 0.1.
It is preferably from 10 to 10 Pa · s, more preferably from 0.5 to 5 Pa · s. If the viscosity of the liquid thermosetting resin at 25 ° C. is less than 0.1 Pa · s, superabrasive grains, fillers, etc. may precipitate during room temperature curing. If the viscosity of the liquid thermosetting resin at 25 ° C. exceeds 10 Pa · s,
It may be difficult to uniformly mix the liquid thermosetting resin, the curing agent, the superabrasive grains, the filler, and the like with stirring. As the superabrasive grains used in the present invention, natural diamond abrasive grains,
Examples thereof include artificial diamond abrasive grains and cubic boron nitride abrasive grains. The grain size of the superabrasive grains used in the present invention is not particularly limited and can be appropriately selected depending on the application of the superabrasive grain wheel. The filler used in the present invention is not particularly limited, and examples thereof include calcium carbonate, clay, alumina, talc, mica, glass powder, tungsten, tungsten carbide, chromium oxide, and magnesium oxide.

In the present invention, a mixture containing a liquid thermosetting resin, a curing agent, superabrasive grains and a filler is stirred by imparting orbital motion and rotation motion, and demixed by imparting orbital motion. After foaming, the mixture that has been uniformly mixed and defoamed is cast, cured at room temperature, and more preferably subjected to a secondary curing treatment at 80 to 200 ° C. There is no particular limitation on the method of imparting orbital motion and rotation to a mixture containing a liquid thermosetting resin, but for example, a mixture such as a hybrid mixer sold by KEYENCE CO., LTD. Exercise can be applied. Fill the container with the mixture, and rotate the container at a rotation speed of 1,000 to 4,000.
Revolution at 0 min ^-1 and rotation speed 400 ~ 1.6
By causing the mixture to rotate at 00 min ^-1 , centrifugal force and centripetal force act simultaneously on the mixture in the container, and the mixture is agitated and homogenized. Although there is no particular limitation on the time for imparting orbital motion and rotation motion and stirring, the mixture can be homogenized usually in 0.5 to 5 minutes. Then, by orbiting the container at a rotation speed of 1,000 to 4,500 min ^-1 ,
Centrifugal force acts on the mixture in the container, and defoaming is performed due to the difference in specific gravity between the mixture and bubbles. 30 to 10 when defoaming
It is preferable to rotate at a slow rotation speed of 0 min ^-1 . There is no particular limitation on the time for defoaming by imparting revolution movement, but normally, defoaming can be completed within 0.5 to 5 minutes.

A mixture containing a liquid thermosetting resin having a relatively high viscosity and a filler has conventionally been stirred and mixed by using a kneader such as a kneader. However, when a kneader such as a kneader is used, it takes a lot of time and labor to clean the blades after mixing, and a large amount of the mixture is attached to the blades and vessel walls and lost. In the present invention, it is not necessary to clean the blade or the like, because the container is filled with the mixture and the mixture is stirred by imparting the orbital motion and the rotational motion. Further, a mixture containing a liquid thermosetting resin having a relatively high viscosity and a filler has been conventionally degassed by depressurization.
However, when the mixture is put under reduced pressure, the bubbles contained therein expand and the volume of the mixture increases, so a large-capacity container is required, and as a result, the amount of the mixture attached to the vessel wall and lost is also large. . In the present invention, the mixture is subjected to centrifugal force to be defoamed, so that the volume of the mixture does not increase and it is not necessary to use a large capacity container. In the conventional method of combining stirring by a kneading machine and vacuum defoaming, the treatment takes time, so that the room temperature curable liquid thermosetting resin composition thickens in the meantime and casting is often difficult. . In the present invention, since stirring and defoaming can be completed in a short time of 1 to 10 minutes, the room temperature curable liquid thermosetting resin composition can be easily treated. Further, in the conventional method in which stirring by a kneader and vacuum defoaming are combined, only a mixture having a high content of the liquid thermosetting resin can be processed, but in the present invention, the liquid thermosetting resin is 50% by weight.
Stirring and defoaming are possible even with a small amount of resin as described below.

In the present invention, the mixture after stirring and defoaming is cast in a desired mold and cured at room temperature. There is no particular limitation on the material of the mold for casting the mixture, for example, a mold,
Resin type etc. can be mentioned. If necessary, a release agent can be applied to the inner surface of the mold. The shape of the mold for casting the mixture is not particularly limited, and for example, it can be cast into a tip mold to form a polishing tip, which can be bonded to a base metal, and cast into an annular mold to form a superabrasive layer. After that, it can be joined to the base metal to form a straight wheel, or it can be cast in a mold equipped with the base metal to obtain a superabrasive wheel simultaneously with curing. In the present invention, since the liquid thermosetting resin is cast into the mold, the degree of freedom of the shape is greater than that of the hot pressing method, and a resin-bonded superabrasive wheel having a complicated shape can be easily obtained. In the present invention, room temperature refers to 5 to 35 ° C. specified in JIS K 0050. In the present invention, the time for curing at room temperature is not particularly limited, but when the curing agent and the accelerator are used in combination to obtain a room temperature curing type, it is 1 to 36 hours, more preferably 4 hours.
The liquid thermosetting resin can be cured by leaving it at room temperature for -24 hours. If the curing time at room temperature is less than 1 hour, the curing of the resin may be insufficient. Even if the curing time of the resin at room temperature exceeds 36 hours, there is no adverse effect, but the effect of increasing the curing time cannot be obtained.

In the present invention, a mixture containing a liquid thermosetting resin, a curing agent, superabrasive grains and a filler is cast and cured at room temperature, and then the formed resin bond superabrasive grain wheel is Further 80 to 200 ° C., more preferably 10
It is preferable to carry out the secondary curing treatment at 0 to 150 ° C. By the secondary hardening treatment, the polymerization and cross-linking of the liquid thermosetting resin can be further advanced, and the properties such as strength, hardness, density, and heat resistance of the resin-bonded superabrasive wheel can be enhanced. Since the resin-bonded superabrasive grain wheel formed by room temperature curing already has morphological stability, it can be subjected to a secondary curing treatment by allowing it to stand still in a constant temperature bath in the air. If the secondary curing treatment temperature is lower than 80 ° C., the effect of the secondary curing treatment may not be sufficiently exhibited. If the secondary curing temperature exceeds 200 ° C., thermal deterioration may occur. The time for the secondary curing treatment is not particularly limited, but is preferably 4 to 20 hours. If the secondary curing time is less than 4 hours, the physical properties such as hardness may become unstable. If the secondary hardening treatment time exceeds 20 hours, the characteristics of the resin-bonded superabrasive wheel will not be improved even if the secondary hardening treatment time is further extended. Since the resin bond superabrasive wheel of the present invention cures a mixture containing a liquid thermosetting resin, a curing agent, superabrasive particles and a filler after stirring and defoaming treatment, it is a resin bond having high density without bubbles. Parts. Further, when the secondary hardening treatment is carried out after room temperature hardening, a superabrasive wheel having a high bond hardness is obtained. According to the manufacturing method of the present invention, a resin-bonded superabrasive wheel having excellent performance can be manufactured without using an expensive mold or molding machine such as the hot press method.

[0012]

The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. Example 1 A resin-bonded superabrasive wheel for stone polishing was manufactured. 100 parts by weight of unsaturated polyester resin [27.5% by weight of unsaturated unsaturated polyester resin, 27.5% by weight of vinyl ester resin, 45% by weight of styrene, viscosity of 2.0 Pa · s],
1 part by weight of methyl ethyl ketone peroxide [NOF CORPORATION, Permec] and 1 part by weight of cobalt naphthenate [Co 6% by weight] were added to prepare a liquid resin as a base material. 30 parts by volume of this liquid resin and # 20 as a filler
70 parts by volume of 00WA abrasive grains were mixed. Artificial diamond abrasive grains with a grain size of # 400 are added to the obtained mixture at 0.3c.
t / cm ^{3 was} mixed. The mixture was continuously stirred for 1 minute and defoamed for 1 minute using a hybrid mixer [KEYENCE HM-500]. Pour the above mixture, which had been stirred and defoamed, to a depth of 15 mm in a separately prepared fluororesin frame with a long diameter of 40 mm and a short diameter of 20 mm and leave it at room temperature for 4 hours to cure. A polishing tip was obtained. The surface hardness of this polishing tip was Rockwell F scale (HRF) 50. The polishing tip after room temperature curing was subjected to heat treatment for 18 hours in a constant temperature bath at 110 ° C. to be secondarily cured. The surface hardness of the polishing tip subjected to the secondary curing treatment was HRF80. Twelve pieces of the secondary hardening treated polishing tips 1 were fixed to a separately prepared disc base metal 2 of 200 mm in diameter with an epoxy adhesive, and used for polishing stone materials in the shape shown in FIG. A resin bond superabrasive wheel was obtained. Using this super-abrasive wheel, the surface finish is 600 mm, which has been pre-finished with a metal polishing machine [Asahi Diamond Industrial Co., Ltd., Miyabi series].
A fine finishing polishing test was performed on a 600 mm granite stone (made in China). The resulting superabrasive wheel was attached to an automatic stone polishing machine [DAIWA MACHINE CO., LTD.], Rotation speed 450 min ^-1 , feed 3.
Polishing was performed for 73 minutes under the conditions of 5 m / min, pressure of 150 kPa, and water amount of 12 L / min. The grinding speed was 3.1 cm ³ / min and the grinding ratio was 38. Comparative Example 1 A resin-bonded superabrasive wheel for stone polishing having the same shape and size as in Example 1 was manufactured by a hot pressing method using a phenol resin. 60 parts by weight of phenolic resin and 40 parts by weight of filler # 2000WA abrasive grains were mixed, and artificial diamond abrasive grains of particle size # 400 were further mixed at 0.3 ct / cm ³ . Using this mixture, hot press molding was carried out at 180 ° C. for 30 minutes, and the same shape as in Example 1 was obtained with a major axis of 40 mm and a minor axis of 2.
A polishing tip having a thickness of 0 mm and a thickness of 15 mm was obtained. The obtained 12 polishing tips were fixed to an aluminum base metal having the same shape as in Example 1 using an epoxy adhesive to obtain a resin-bonded superabrasive wheel for stone polishing. The obtained superabrasive wheel was used to fine-finish granite under the same conditions as in Example 1. The grinding speed was 2.1 cm ³ / min and the grinding ratio was 20. The results of Example 1 and Comparative Example 1 are shown in Table 1.

[0013]

[Table 1]

As can be seen from Table 1, the grinding speed of the superabrasive wheel of Example 1 is about 50% higher than that of the superabrasive wheel of Comparative Example 1, and the grinding ratio is higher than that of Example 1. The abrasive wheel is about twice as large as the superabrasive wheel of Comparative Example 1. Example 2 A straight wheel having a shape defined by JIS B 4131 of 1A1 and dimensions of 175D × 6T × 3X × 50.8H was manufactured. Unsaturated polyester resin [iso-unsaturated polyphenylene ether resin 27.5% by weight, vinyl ester resin 27.5 resin, styrene 45 resin, viscosity 2.0
To 100 parts by weight of Pa · s, 1 part by weight of methyl ethyl ketone peroxide [NOF CORPORATION, Permec] and 1 part by weight of cobalt naphthenate [Co 6% by weight] were added to prepare a liquid resin as a base material. 100 parts by weight of this liquid resin,
50 parts by weight of silicon carbide having an average particle size of 11 μm as a filler and 50 parts by weight of nickel-coated synthetic diamond abrasive grains having a particle size of 230/270 (nickel coverage 55% by weight) were mixed. Hybrid mixer [Keyence Corporation, HM
-500] was used for 1 minute of continuous stirring and 1 minute of defoaming. 169D × 6T × 5 prepared separately
A 0.8H aluminum alloy base metal is loaded into a mold coated with a mold release agent, and the above stirring and defoaming mixture is cast into the gap between the base metal and the mold, and the mixture is left at room temperature for 24 hours. It was left standing to cure, and the straight wheel on which the diamond abrasive grain layer was formed was taken out from the mold. Next, the taken out straight wheel was heated for 14 hours in a constant temperature bath at 120 ° C. for secondary curing treatment. The outer periphery and both side surfaces of the treated diamond abrasive grain layer were ground to obtain a straight wheel. A grinding test was performed using this straight wheel. A straight wheel was attached to a surface grinder [Okamoto Machine Tool Mfg. Co., Ltd., KSK-Z1], and a grinding wheel GC180-G was used to drive the processing method 20 ^o.
Inclination, wheel speed 1,800 min ^-1 , grindstone speed 400 min ^-1 , feed rate 1 m / min, depth of cut 15 μm /
The obtained straight wheels were dressed under the conditions of pass. Then, by the wet plunge grinding method,
Cemented Carbide K-20, wheel speed 1,800mi
Grinding was performed under the conditions of n ⁻¹ , table feed of 2 m / min, and cut depth of 50 μm until the total grinding amount reached 6.3 cm ³ . The normal grinding resistance during this period was 70 N on average, and the grinding ratio was 27.
It was 0. Comparative Example 2 A straight wheel having the same shape and size as those of Example 2 was manufactured by hot pressing using phenol resin. 100 parts by weight of phenol resin, 50 parts by weight of silicon carbide having an average particle size of 11 μm as a filler, and a particle size of 230
50 parts by weight of nickel-coated synthetic diamond abrasive grain of / 270 (nickel coating rate 55% by weight) was mixed, and a diamond abrasive grain layer was formed on the outer periphery of the same base metal as in Example 2 by the hot pressing method. This straight wheel is used in Example 2
Dressing was carried out under the same conditions as above, and a grinding test was carried out under the same conditions as in Example 2. The normal grinding resistance during the test was 86 N on average and the grinding ratio was 290. Example 2 and Comparative Example 2
The results are shown in Table 2.

[0015]

[Table 2]

As can be seen from Table 2, the straight wheel manufactured by using the unsaturated polyester resin of Example 2 is more than the straight wheel manufactured by the hot pressing method by using the phenol resin of Comparative Example 2. The normal grinding resistance is small and the grinding ratio is the same.

[0017]

The resin-bonded superabrasive wheel of the present invention has a high density without bubbles in the resin-bonded portion, has excellent sharpness, and has a long life. According to the method of the present invention, such a resin-bonded superabrasive wheel can be simply and easily manufactured without using an expensive die or molding machine.

[Brief description of drawings]

FIG. 1 is a perspective view of a resin bond superabrasive wheel manufactured in an example.

[Explanation of symbols]

1 Polishing tip 2 units

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields investigated (Int.Cl. ⁷ , DB name) B24D 3/30 B24D 3/00 320 B24D 3/00 340

Claims (2)

(57) [Claims] 1. A container is filled with a mixture containing a liquid thermosetting resin, a curing agent, superabrasive grains and a filler, and the container is agitated by imparting orbital and rotational motions to the orbital motion.
After defoaming by applying , the mixture is cast and cured at room temperature, and then secondarily cured at 80 to 200 ° C.
Resin bond superabrasive wheel manufacturing method which is characterized in that that. 2. A liquid thermosetting resin is an unsaturated polyester.
The cash register according to claim 1, which is a resin or a vinyl ester resin.
Bonded super abrasive wheel manufacturing method.