JPH08290363A - Wet type grinding wheel with pedestal and its manufacture - Google Patents

Abstract

PURPOSE: To make an effective use of a grinding wheel at a low cost and in a short period of delivery, and to improve the handling. CONSTITUTION: A pedestal 2 is formed of a resin material through the resin forming, and fitting holes 3, 3 and relief grooves 4, 4 are formed in the pedestal 2 during the forming. After a grinding wheel 5 is adhered to a grinding wheel adhering surface 2A of the pedestal 2, bolt inserting holes 6, 6 to be communicated with the fitting holes 3, 3 and discharging grooves 7, 7 are formed in the grinding wheel 5 to manufacture a wet type grinding wheel 1 having a pedestal. When the pedestal 2 is formed, each fitting hole 3 and each relief groove 4 are formed at the same time, the pedestal 2 can be easily worked, and the weight of the wet type grinding wheel 1 having the pedestal can be reduced by forming the pedestal 2 of the resin. In addition, the grinding wheel 5 can be used until the edge of the grinding wheel is close to the pedestal 2 by forming each relief groove 4 in the pedestal 2, and the rigidity of the pedestal 2 can be increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet grindstone with a pedestal suitable for use in, for example, a surface grinder and a method for manufacturing the same.

[0002]

2. Description of the Related Art Generally, when grinding an aluminum substrate for a magnetic disk or the like, a surface grinder is used. The surface grinders are arranged opposite to each other and are driven to rotate by a motor or the like. And a polishing whetstone attached to each surface plate. Then, in order to polish the aluminum substrate, the aluminum substrate is sandwiched between respective polishing grindstones, and in this state, the respective surface plates are rotated so that both surfaces are simultaneously polished.

Here, each polishing grindstone is formed in a circular shape as a whole by arranging a plurality of fan-shaped grindstones with pedestals. Further, each whetstone with a pedestal is composed of a fan-shaped pedestal made of an aluminum material, and a wet whetstone adhered on the pedestal, and the whetstone with a pedestal is used as a surface plate of a surface grinder on the pedestal. A mounting hole for mounting via a bolt is formed. Further, in the wet grindstone, a bolt insertion hole communicating with the mounting hole of the pedestal, a discharge groove for discharging cutting powder and the like from the grindstone surface during polishing, and a cutting inserted into the bolt insertion hole located on the bonding surface side with the pedestal Escape grooves and the like are formed to escape the powder and the like and to escape the cooling water that swells from the wet grindstone and oozes out.

Next, a method of manufacturing a whetstone with a pedestal according to the prior art thus constructed will be described.

First, in order to manufacture a wet grindstone itself, a sponge with kneaded abrasive grains is cut out from a material of a wet grindstone hardened with a resin into a predetermined fan-shaped grindstone piece, which is then flat-shaped, and this grindstone piece is then cut. In addition, drilling holes such as bolt insertion holes corresponding to the mounting holes of the aluminum pedestal, discharge grooves for discharging cutting powder, and relief grooves for escaping cooling powder flowing out from the cutting powder and wet grindstone in the bolt insertion holes, and groove processing.

Then, a grindstone with a pedestal is manufactured by adhering a wet grindstone piece, which has been hole-processed and grooved as described above, to the grindstone-bonding surface of an aluminum pedestal prepared separately.

Here, the aluminum pedestal is a flat plate body in which an aluminum plate is formed into a fan shape, and a mounting hole, an air blowing hole and the like are processed, and is expensive in terms of price. The aluminum pedestal is repeatedly reused between the manufacturer and the user who owns the surface grinder.

Therefore, as to the exchange of products between the manufacturer and the user, when the wet grindstone is worn to the limit of its use due to polishing work, the used grindstone with a pedestal is returned to the maker and bonded to the aluminum pedestal. The remaining wet grindstone is peeled off (peeling step). Next, the distortion of the aluminum pedestal that occurs when the wet grindstone is peeled off is corrected, and the pedestal is flattened so that it can be reused (bonding preparation step). Furthermore, when the aluminum pedestal becomes reusable, the wet grindstone that has been subjected to the hole processing and groove processing as described above is bonded to the pedestal (bonding step). Then, the whetstone with a pedestal manufactured in this manner is supplied again to the user.

[0009]

By the way, in the above-mentioned prior art, since the wet grindstone is firmly adhered to the pedestal so that the wet grindstone does not fall off from the aluminum pedestal during polishing, the wet grindstone is removed from the pedestal. In addition to requiring a lot of labor and time to peel off, the aluminum pedestal is deformed during peeling, and if the pedestal is deformed it will not be possible to carry out highly accurate polishing, so it is necessary to correct this pedestal, There is a problem that the cost for regenerating the pedestal increases.

Further, according to the prior art, it takes time to peel off the wet grindstone and straighten the pedestal made of aluminum material, and it takes time to regenerate the pedestal because the time for sending the pedestal from the user to the manufacturer is added. Therefore, it is impossible to manufacture a whetstone with a pedestal until the pedestal can be regenerated. As a result, the time to manufacture a whetstone with a pedestal,
That is, there is a problem that delivery time becomes long.

Further, in the case of using a pedestal made of aluminum as in the prior art, when the pedestal is grooved and cutting powder is discharged, the price of the pedestal becomes high and deformation is corrected. Since the groove is deformed, it is necessary to form a relief groove, a discharge groove, etc. on the wet grindstone side. For this reason, the wet grindstone wears with use and cannot be used when this wear reaches the relief groove, and there is a problem that the wet grindstone cannot be effectively used to the end.

Further, since the pedestal is made of an aluminum material, the grindstone with the pedestal becomes heavy, which makes the handling difficult at the time of attaching / detaching to / from each surface plate and also causes a problem that the transportation cost increases. .

The present invention has been made in view of the above-mentioned problems of the prior art, and provides a wet grindstone with a pedestal and a method of manufacturing the grindstone that can be used effectively at a low cost and in a short delivery time and can be easily handled. It is intended to be provided.

[0014]

In order to solve the above problems, a wet grindstone with a pedestal adopted by the invention of claim 1 is a wet grindstone with a pedestal in which a wet grindstone is bonded to a fan-shaped pedestal. The pedestal is formed of a resin material as a resin pedestal, and an escape groove for escaping cooling water is formed on the grindstone bonding surface of the resin pedestal.

Further, as in the invention of claim 2, the relief groove may be formed in the radial direction of the resin base.

Further, as in the invention of claim 3, the relief groove may be formed in the direction of centrifugal force of the resin pedestal.

Further, as in the invention of claim 4, it is preferable that the relief groove allows a large amount of cooling water or cutting powder to flow radially outward from the center direction.

Furthermore, as in the invention of claim 5, it is preferable that the resin pedestal is provided with a mounting hole for the surface plate, and the mounting hole is inserted into at least one of the relief grooves.

On the other hand, the method of manufacturing a wet grindstone with a pedestal adopted by the invention according to claim 6 is a fan-shaped pedestal in which a mounting hole for a surface plate for a polishing machine and an escape groove for letting out cooling water are formed on the bonding surface side of the grindstone. A resin-forming step, a step of adhering a wet grindstone that has been processed in advance to a fan-shaped pedestal that has been resin-molded, a mounting hole that communicates with the mounting hole of the fan-shaped pedestal, and cutting And a processing step of processing a discharge groove for powder and cooling water.

[0020]

According to the structure of the first aspect of the present invention, since the pedestal is made of a resin material, it can be easily molded, and even a large number of escape grooves can be easily formed, and the weight is light. Moreover, since the escape groove is formed in the resin pedestal, the wet grindstone can be effectively used to the end and the rigidity of the resin pedestal can be increased.

According to the second aspect of the present invention, by rotating the resin pedestal, the abrasion powder and cutting powder of the grindstone that has entered the relief groove can be discharged radially outward together with the cooling water.

Further, according to the third aspect of the invention, by rotating the resin pedestal, the abrasion powder and cutting powder of the grindstone that has entered the relief groove can be discharged together with the cooling water in the centrifugal force direction.

Further, according to the structure of the invention of claim 4, in the polishing process, the cooling water flows while increasing from the rotation center side toward the radially outer side, but wear powder and cutting powder are released together with the cooling water. It can be smoothly flowed to the outer diameter side in the groove without resistance.

Further, according to the structure of the fifth aspect of the invention, the abrasion powder and the cutting powder that have entered the mounting hole can be discharged through the escape groove.

On the other hand, according to the method of the invention of claim 6, the fan-shaped pedestal is resin-molded in the molding step to allow the cooling water to escape to the mounting hole to the surface plate for the polishing machine and the bonding surface side of the grindstone. Can be formed at the same time, and after the wet grindstone is adhered to the fan-shaped pedestal in the bonding step, a mounting hole that communicates with the mounting hole of the fan-shaped pedestal and a discharge groove for cutting powder and cooling water are formed in the grindstone in the processing step. By doing so, a wet grindstone with a pedestal can be easily manufactured. Moreover, in the processing step, even if the processing tool comes into contact with the resin base, the tool can be prevented from being damaged.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wet grindstone with a pedestal according to an embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a wet grindstone with a pedestal according to this embodiment, and the wet grindstone 1 with a pedestal is composed of a pedestal 2 and a grindstone 5 which will be described later.

Reference numeral 2 denotes a pedestal made of a resin material which forms the base of the wet grindstone 1 with a pedestal, and the pedestal 2 is, for example, as shown in FIG. 2, a phenol resin, a melamine resin, a xylene resin, an epoxy resin, a urea resin, It is formed as a fan-shaped flat plate by molding a resin material such as furan resin. Further, the pedestal 2 is formed with two mounting holes 3 and 3 spaced apart from each other in the radial direction. In each of the mounting holes 3, bolts (not shown) for mounting the pedestal 2 on a surface plate 12, 15 described later are shown. Can be installed. Further, the grindstone bonding surface 2A on the surface side of the pedestal 2 is provided with fine irregularities (not shown) for enhancing the affinity with the adhesive as in the sanding treatment described in the prior art.

Reference numerals 4, 4, ... Denote a plurality of relief grooves formed on the grindstone adhering surface 2A side of the pedestal 2, and each of the relief grooves 4 extends in the radial direction of the pedestal 2 at equal intervals to form a whole. Are arranged radially. Here, each relief groove 4
Is for releasing cooling water and the like swelling and bleeding from the grindstone 5 to the outer peripheral side by centrifugal force during polishing. Also,
Each relief groove 4 is provided when the grindstone 5 is first used.
It is soaked in water to make it familiar, but at this time, the preparation time is shortened by sucking water from the back surface side (base side) of the grindstone 5 through the relief grooves 4. .

Further, each relief groove 4 is, as shown in FIG.
The inner peripheral side (center side) is the shallow groove portion 4A and the outer peripheral side is the deep groove portion 4A.
The groove depth is gradually increased toward the outer peripheral side at an angle α so that the amount of cooling water increases from the center side to the outer peripheral side when performing polishing work. Cooling water that increases toward the outer circumference can be smoothly distributed without resistance. Further, the relief groove 4 located at the center among the relief grooves 4 is arranged so as to penetrate through the respective mounting holes 3 in the radial direction, and the relief grooves 4 enter into the respective mounting holes 3 so as to wear powder and cutting powder. It is something that is missed with cooling water. The relief grooves 4 are formed at the same time as the mounting holes 3 when the pedestal 2 is resin-molded.

Reference numeral 5 denotes a grindstone adhered to the grindstone adhering surface 2A of the pedestal 2. The grindstone 5 is formed by, for example, solidifying a sponge with abrasive grains and solidifying with a resin, and polishing in a state containing water. It is a wet grindstone. Also, grindstone 5
Bolt insertion holes 6 and 6 are formed corresponding to the mounting holes 3 and 3 of the pedestal 2 as mounting holes. Further, two slanting discharge grooves 7, 7 are formed in the grindstone 5 by groove processing, and the grindstone 5 is radially divided into three by each of the discharge grooves 7. Here, each discharge groove 7 is for discharging cooling water, cutting powder, etc. supplied during polishing from the surface of the grindstone 5,
The cutting powder is prevented from remaining on the surface of the grindstone 5 and scratching the polished surface.

Next, a method of manufacturing the wet grindstone 1 with a pedestal will be described with reference to FIGS.

First, in the pedestal forming step shown in FIG.
As shown in FIG. 2, a fan-shaped pedestal having each mounting hole 3 and each relief groove 4 is molded by subjecting the resin material to resin molding processing such as hot pressing. In addition, at the time of forming the pedestal, fine irregularities are formed on the grindstone bonding surface 2A of the pedestal 2,
The affinity with the adhesive is increased.

Then, a grindstone forming step is carried out in parallel with the pedestal forming step. In this grindstone forming step, the grindstone 5 is cut out from a material obtained by kneading a sponge and abrasive grains with a resin with a regular outer dimension, The grindstone 5 is subjected to a flat surface forming process.

Next, in the bonding step, the grindstone 5 which is separately flat-molded as described above is bonded to the grindstone bonding surface 2A of the resin pedestal 2 which is resin-molded in advance.

Finally, when the pedestal 2 and the grindstone 5 are completely adhered to each other, a machining process is started. In this machining process, the grindstone 5 has bolt insertion holes 6, 6 corresponding to the mounting holes 3, 3 of the pedestal 2, and 2
By forming the discharge grooves 7 and 7 of the book,
The wet grindstone 1 with a pedestal shown in can be manufactured. At this time, in this processing step, since a tool for processing a soft material such as the wet grindstone 5 is used, if the pedestal is made of an aluminum material as in the prior art, the tool touches the pedestal. However, in this embodiment, the pedestal 2 is made of a resin material to prevent the tool from being damaged.

The wet grindstone 1 with a pedestal thus manufactured is attached to a surface grinder and is used as a tool for disc polishing. Next, a surface grinder using the wet grindstone 1 with a pedestal is used. This will be described with reference to FIG.

Reference numeral 11 is a conventionally known surface grinder, and the surface grinder 11 includes a lower surface plate 12, a sun gear 13 provided at the center of the surface plate 12, and a surface plate 12. Is generally constituted by an internal gear 14 provided on the outer peripheral side of the base plate and an upper base plate 15 located above the base plate 12 and capable of moving up and down, and the base plates 12, 15 and the sun gear 13, The internal gears 14 are each rotated by a drive motor. Also, a plurality of wet grindstones with pedestals 1, 1, ...
A holding plate 17 that holds an aluminum substrate 16 so as to mesh with the sun gear 13 and the internal gear 14 is disposed on each pedestal wet grindstone 1 of the lower surface plate 12.

Surface grinder 1 using wet grindstone 1 with pedestal
1 is configured in this way, and its operation will be described next.

First, since the grindstone 5 used in this embodiment is a wet grindstone, when used for the first time, the wet grindstone 1 with a pedestal is immersed in water for a certain period of time so that the grindstone 5 as a whole contains water. After that, it is attached to the surface plates 12 and 15. In this case, in the wet grindstone 1 with the pedestal according to the present embodiment, since the escape grooves 4 are formed on the grindstone adhering surface 2A of the pedestal 2 which is the back surface side of the grindstone 5, moisture is also absorbed from the back surface side of the grindstone 5. It is possible to make the entire whetstone 5 contain water in a short time.

As described above, when the grindstone 5 is made to contain water during use, the grindstone 5 expands in volume, but in this embodiment, since the relief grooves 4 are provided in the pedestal 2 to increase the rigidity,
The pedestal 2 is not largely deformed by the volume expansion of the grindstone 5.

Next, as a preparatory work for polishing, each aluminum substrate 16 is assembled to a holding plate 17, and the holding plate 17 is placed on each wet grindstone 1 with a pedestal arranged below, and the sun gears 13 and It meshes with the internal gear 14. Further, when the holding plate 17 (aluminum substrate 16) is attached, the upper surface plate 15 is lowered to sandwich each aluminum substrate 16 held by the holding plate 17 between the wet grindstones 1 with pedestals.

When the polishing preparation work is completed, the surface plates 12 and 15 and the gears 13 and 14 are rotated by the motor while supplying the cooling water. As a result, the aluminum substrates 16 held by the holding plate 17 revolve around the sun gear 13 while rotating, and are polished by the upper and lower grindstones 5.

Although abrasion powder of the grindstone 5 and cutting powder of the aluminum substrate 16 are generated at the time of this polishing, since each discharge groove 7 is formed in the grindstone 5, the grindstone is passed through each discharge groove 7. By discharging the abrasion powder and the cutting powder from the surface of No. 5, it is possible to prevent the polishing surface of the aluminum substrate 16 from being scratched by the cutting powder or the like. On the other hand, since the relief grooves 4 extending in the radial direction are formed in the pedestal 2, the grindstone 5
The amount of water contained in the grindstone 5 is properly maintained by letting the cooling water that swells and oozes out of the grindstone 5 escape to the outer peripheral side, and the abrasive powder absorbed in the grindstone 5 is discharged together with the cooling water. Prevents clogging of 5. Moreover, since the relief grooves 4 are deepened at the angle α so that the inner peripheral side is the shallow groove portion 4A and the outer peripheral side is the deep groove portion 4B, it is worn together with the cooling water increasing toward the outer peripheral side. powder,
The cutting powder can be smoothly passed and released without resistance.

Thus, according to this embodiment, since the pedestal 2 is molded by molding the resin material, each mounting hole 3, each relief groove 4, etc. should be formed at the same time when the pedestal 2 is molded with resin. In addition, the pedestal 2 can be manufactured very easily without requiring a wide variety of processes as in the prior art, and the productivity can be significantly improved and the manufacturing cost can be significantly reduced. it can.

Moreover, by disposing the resin pedestal 2 instead of reusing it, it is possible to reduce the cost required to regenerate the pedestal like the conventional aluminum pedestal, and to wait for the pedestal to be regenerated. It is possible to prevent a decrease in productivity due to, and to shorten the delivery time.

Further, since the escape grooves 4 are formed on the pedestal 2, firstly, the cooling water that swells and oozes out from the grindstone 5 during polishing can be escaped to the outer peripheral side together with abrasion powder and cutting powder. , The amount of water contained in the grindstone 5 can be properly maintained, and polishing failure due to clogging of the grindstone 5 and the inclusion of cutting powder can be prevented, and the condition of the grindstone 5 can be improved to improve the finishing accuracy of the polished surface. be able to. Secondly, the water absorption efficiency of the grindstone 5 can be increased, and the wet grindstone 1 with a pedestal is first provided.
The preparation work time when using can be shortened. Thirdly, the grindstone 5 can be used just before the pedestal 2, and the grindstone 5 can be effectively used. Fourth
In addition, the rigidity of the pedestal 2 can be increased to prevent deformation of the grindstone 5 due to volume expansion, and the grinding surface of the grindstone 5 can be made flat to improve the grinding accuracy.

Further, by forming the pedestal 2 from a resin material, the weight can be significantly reduced as compared with the pedestal made of an aluminum material described in the prior art. The grindstone 1 can be easily attached and detached, the handleability can be improved, and the weight of the pedestal 2 can be reduced to reduce the cost required for transportation. Moreover, even when the tool touches the base 2 when processing the grindstone 5, the tool can be prevented from being damaged.

On the other hand, since the respective escape grooves 4 are formed so as to extend in the radial direction of the pedestal 2, the cooling water together with the abrasion powder and the cutting powder is cooled by the centrifugal force when the surface plates 12 and 15 rotate. Can be missed to the side.

Further, since the central relief groove 4 among the relief grooves 4 is formed so as to pass through the respective mounting holes 3 in the radial direction, the relief grooves 4 are relieved from the inside of the mounting holes 3 where abrasion powder and cutting powder are likely to accumulate. Abrasion powder and cutting powder can be discharged through the groove 4, and it is possible to reliably prevent the aluminum substrate 16 which is the object to be polished from being damaged by the cutting powder or the like.

Further, since each relief groove 4 is formed so that the inner peripheral side becomes the shallow groove portion 4A and the outer peripheral side becomes the deep groove portion 4B so that the groove depth is gradually deepened at the angle α, the amount is increased toward the outer peripheral side. It is possible to smoothly circulate the cooling water together with the abrasion powder and the cutting powder without resistance, and it is possible to reliably discharge the cooling water and the like through each escape groove 4.

Further, since the pedestal 2 made of a resin material has a good affinity with the adhesive, and fine irregularities are formed on the grindstone adhering surface 2A at the time of molding, the pedestal 2 and the grindstone 5 are solid. It can be adhered to, and the whetstone can be surely prevented from falling off.

Next, FIG. 6 shows a first modification of the present invention. The feature of this first modification is that a plurality of escape grooves are formed on the whetstone bonding surface 2A of the base 2 so as to extend in the centrifugal force direction. 21,21,
... is provided.

Thus, in the first modified example configured as described above, the centrifugal force at the time of rotation is caused by the abrasion powder in each relief groove 21,
It can effectively act on the cutting powder and the cooling water, and the discharge efficiency can be improved.

Next, FIG. 7 shows a second modification of the present invention. The feature of this second modification is that the grindstone adhering surface 2A of the pedestal 2 is
The relief grooves 31, 31, ..., 32, 32, ... That extend in the centrifugal force direction so as to correspond to the one rotation direction are provided.

Thus, in the second modified example having such a configuration, it can be used for a clockwise or counterclockwise turn table without being restricted by the direction of rotation, and the range of use can be expanded.

In the above embodiment, each escape groove 4 is formed such that the groove depth gradually becomes deeper at an angle α so that the inner peripheral side becomes the shallow groove portion 4A and the outer peripheral side becomes the deep groove portion 4B, and is directed toward the outer peripheral side. Although the amount of wear powder, cutting powder, and cooling water that is increased is increased, as in the third modification shown in FIG. 8, the relief grooves 41, 41, ... Have a narrow width portion 41A on the inner peripheral side and a wide width on the outer peripheral side. The groove width may be gradually increased with the angle β so as to form the portion 41B.

Further, as in the fourth modification shown in FIG. 9, the arrangement intervals of the escape grooves 51, 51, ... May be gradually reduced from the inner peripheral side toward the outer peripheral side.

Further, in the above-mentioned embodiment, the case where the grindstone 5 is divided into three by the two discharge grooves 7 and 7 in the radial direction has been exemplified, but the grindstone 5 may be divided into two or four or more. It may be divided in the circumferential direction.

[0060]

As described in detail above, according to the invention of claim 1, the pedestal is formed as a resin pedestal, and a relief groove for escaping cooling water is formed on the grindstone bonding surface of the resin pedestal. Therefore, the weight of the resin pedestal can be lightened, the handleability of the wet grindstone with the pedestal can be improved, and the escape groove can be formed at the same time when the pedestal is molded, which can improve the productivity and reduce the manufacturing cost. . Moreover, since the relief groove is formed on the resin pedestal side, the wet grindstone can be used effectively to the end, and the rigidity of the resin pedestal can be increased to prevent deformation due to volumetric expansion of the grindstone. The accuracy can be improved.

According to the second aspect of the invention, since the escape groove is formed in the radial direction of the resin pedestal, when the resin pedestal rotates, abrasion powder of the grindstone that has entered the escape groove and The cutting powder can be discharged to the outside in the radial direction together with the cooling water, and the polishing failure due to the inclusion of the cutting powder or the like can be prevented.

Further, according to the invention of claim 3, since the relief groove is formed in the centrifugal force direction of the resin pedestal, the abrasion powder of the grindstone that has entered the relief groove by the rotation of the resin pedestal. And the cutting powder can be discharged in the direction of centrifugal force together with the cooling water, and it is possible to prevent the polishing failure due to the inclusion of the cutting powder and the like.

Further, according to the invention of claim 4, since a large amount of cooling water or cutting powder can be made to flow in the relief groove radially outside of the center direction, it is directed radially outward from the center side. The cooling water to be increased in amount can be smoothly flowed together with the abrasion powder and the cutting powder in the escape groove without resistance, and can be reliably discharged through the escape groove.

Further, according to the invention of claim 5, since the resin pedestal is provided with a mounting hole for the surface plate and the mounting hole is inserted into at least one of the relief grooves, the mounting hole is provided in the mounting hole. The wear powder and cutting powder that have entered can be reliably discharged through the escape groove, and it is possible to prevent the polishing surface from being damaged by the wear powder and cutting powder.

On the other hand, according to the method of the sixth aspect of the present invention, the fan-shaped pedestal is resin-molded in the molding step to release the cooling water to the mounting hole to the polishing machine surface plate and the bonding surface side of the grindstone. Can be formed at the same time, and after the wet grindstone is adhered to the fan-shaped pedestal in the bonding step, a mounting hole that communicates with the mounting hole of the fan-shaped pedestal and a discharge groove for cutting powder and cooling water are formed in the grindstone in the processing step. By doing so, a wet grindstone with a pedestal can be easily manufactured, and productivity can be improved and manufacturing cost can be reduced. Moreover, in the machining step, even if the machining tool may come into contact with the fan-shaped pedestal, the pedestal made of the resin material has the same hardness as the grindstone, so that it is possible to prevent the machining tool from being damaged. The workability of can be improved.

[Brief description of drawings]

FIG. 1 is a plan view showing a wet grindstone with a pedestal according to an embodiment of the present invention.

FIG. 2 is a plan view showing a pedestal in FIG.

FIG. 3 is a cross-sectional view of a wet grindstone with a pedestal viewed from the direction of arrows III-III in FIG.

FIG. 4 is a process explanatory view showing a method for manufacturing a wet grindstone with a pedestal.

FIG. 5 is an external perspective view showing a main part of a surface grinder applied to this embodiment.

FIG. 6 is a plan view of a pedestal showing a relief groove according to a first modified example of the present invention.

FIG. 7 is a plan view of a pedestal showing a relief groove according to a second modification of the present invention.

FIG. 8 is a plan view of a pedestal showing a relief groove according to a third modification of the present invention.

FIG. 9 is a plan view of a pedestal showing a relief groove according to a fourth modification of the present invention.

[Explanation of symbols]

 1 Wet whetstone with pedestal 2 pedestal (resin pedestal) 3 Mounting hole 4, 21, 31, 32, 41, 51 Relief groove 6 Bolt insertion hole (mounting hole) 7 Discharge groove 12, 15 Surface plate

Claims (6)

[Claims] 1. A wet grindstone with a pedestal, comprising a fan-shaped pedestal and a wet grindstone adhered to the pedestal, wherein the pedestal is formed of a resin material as a resin pedestal, and cooling water is released to the grindstone adhering surface of the resin pedestal. A wet grindstone with a pedestal characterized by having grooves formed therein. 2. The wet grindstone with a pedestal according to claim 1, wherein the relief groove is formed in a radial direction of the resin pedestal. 3. The wet grindstone with a pedestal according to claim 1, wherein the relief groove is formed in a centrifugal force direction of the resin pedestal. 4. The wet grindstone with a pedestal according to claim 1, wherein the relief groove allows a large amount of cooling water and cutting powder to flow radially outward from the center direction. 5. The wet type with a pedestal according to claim 1, 2, 3 or 4, wherein the resin pedestal is provided with a mounting hole for a surface plate, and the mounting hole is inserted through at least one of the relief grooves. Whetstone. 6. A molding step of resin-molding a fan-shaped pedestal in which an escape groove for allowing cooling water to escape is formed in a mounting hole for a polishing machine surface plate and a bonding surface side of a grindstone, and the resin-molded fan-shaped pedestal is previously formed. With a pedestal consisting of an adhering step for adhering the wet grindstone being processed, and an adhering step for adhering the adhering wet grindstone with a mounting hole communicating with the mounting hole of the fan-shaped pedestal and a cutting powder and cooling water discharge groove Wet grinding wheel manufacturing method.