JPH03131477A - Diamond wheel device for polishing stone material - Google Patents

Abstract

PURPOSE:To enable the direct supply of clean water even to a diamond grinder located at an outer diameter side by applying the constitution wherein many through-holes are formed on a base in different radial directions, and a liquid supplied to the water sump space of a case member is fed to the diamond grinder in different radial directions via the aforesaid through-holes. CONSTITUTION:A diamond grinding device 3 is rotated with a motor or the like, and a liquid (water) is supplied to the water sump space 6 thereof. Further more, the liquid is supplied to a diamond grinder 1 via many through-holes 71, 72, 73 and so forth located at different radial directions. Consequently, the inner diameter side of the diamond grinder 1 is always washed and cooled with the liquid (water) fed through the center through-hole 71. In addition, the outer diameter portion of the grinder 1 is always supplied with much and fresh liquid (water) through the holes 72, 73 and so forth on a circumference, depending upon the amount of work. Regardless of high heat generation and a large grind ing amount depending upon the amount of work, therefore, a grinding surface and the grinder 1 can be properly cooled, and debris or the like can be washed away.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a diamond grindstone device for polishing stone materials, and more particularly to a structure for supplying liquid to a diamond grindstone.

(B) Conventional technology Conventionally, a diamond grinding wheel device for stone polishing has a diamond grinding wheel dotted in a binder such as diamond abrasive grains fixed to the lower surface of a disc-shaped base, and the center part of the base is fixed to the lower surface of a disc-shaped base. It is constructed by forming a through hole for water supply.

The diamond grindstone device is rotationally driven by a motor or the like, and water is supplied from a central through hole, and the diamond grindstone performs polishing while washing the polishing surface with the water.

As a result, when polishing stones such as tombstones, the roughness of the surface of the stone is gradually increased by using diamond grinding wheels with large grain sizes (small grain sizes) and then using grinding stones with small grain sizes (large grain sizes). I'll finish it.

(C) Problems to be Solved by the Invention By the way, diamond grindstones are arranged radially, and the circumferential speed increases in proportion to the radius, so that the closer to the outer diameter side the diamond grindstones are located, the greater the amount of work done by the diamond grindstones. However, during polishing work using the diamond grindstone, the water supplied for cooling, penetrating, and cleaning purposes flows down only from the center of the base. However, water used in the inner diameter portion is simply scattered by centrifugal force to the outer diameter portion where the amount of work is large, and the amount of water supplied and its cleanliness are not sufficient.

As a result, the outer diameter of the diamond grinding wheel is not sufficiently cooled by water, the binder softens and the diamond abrasive grains easily fall off, and the amount of water that permeates between the abrasive grains and the polishing surface increases. If the amount is small, fallen abrasive grains, polishing layers, etc. will be mixed therein, and sufficient cleaning action will not be possible, resulting in clogging, etc., which will reduce polishing efficiency.

In particular, when a diamond grindstone with a small particle size is used, the above-mentioned problems due to high temperature and poor cleaning become noticeable, and polishing may become impossible.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a diamond grinding wheel device which can also directly supply liquid to the diamond grinding wheel located on the outer diameter side where the amount of work is large, thereby solving the above-mentioned problems.

(d) Means for Solving the Problems The present invention has been made in view of the above circumstances, and as shown in FIGS. 1, 2, 6 and 7, for example, diamond abrasive grains are used. In a diamond grinding stone device (3) for stone polishing, in which diamond grinding wheels (1) dotted in a binder are fixed to the lower surface of a disc-shaped base (2), a case is attached to the upper surface of the base (2). The member (5) is fixed to form a water reservoir space (6), and the base (2) is provided with a large number of through holes (71), (72...) (73...) on different radii.
...), ... to guide the liquid supplied to the water reservoir space (6) through the through hole (7...) onto different radii of the diamond grinding wheel (1). It is characterized by becoming.

(E) Function Based on the above configuration, the diamond grinding wheel device (3) is rotated by a motor etc., liquid (water) is supplied to the water reservoir space (6), and the liquid is located on different radii. It is supplied to the diamond grindstone (1) through a large number of through holes (7), (7□), (73), . . . . As a result, the inner diameter side of the diamond grinding wheel (1) has a central through hole (
Of course, the outer diameter side part is constantly flushed and cooled by the liquid (water) supplied from the through hole ( 7□
), (73)..., and although the heat generation and grinding amount are large depending on the amount of work, it reliably cools the polishing surface and the grinding wheel (1), and also cools the polishing layer etc. Make sure to wash it off.

Note that the reference numerals in parentheses above are used to contrast with the drawings, but do not limit the structure in any way.

(F) Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The diamond grindstone device 3 for stone polishing is shown in FIGS. 1 and 2.
As shown in the figure, the base 2 has a disk shape in plan view, and the base 2 has a large number of through holes 7□, 72...7, . ... is formed. Further, a large number of units 12.13 each consisting of a joint 9 and a diamond whetstone 1 are fixed to the lower surface of the base 2, and a tray-shaped case member 5 is fixed to the upper surface of the base 2. There is. Further, a connecting member 15 is fixed to the center of the upper surface of the case member 5, and a notch groove 15a opening upward is formed in the side surface of the boss portion of the connecting member 15. Further, the rotary drive shaft 16 has a hole 17 for water supply formed in its center, and a pin 19.19 is implanted at the lower end thereof to engage with the notch groove 15a and connect them together. A pulley to which rotation from the motor is transmitted is fixed to the upper part (not shown), and a water supply hose is connected thereto.

In addition, the case member 5 has a communication hole 2° formed in its center, and also forms a water reservoir space 6 with the upper surface of the base 2. The supplied water is led to the water reservoir space 6 through the communication hole 2o,
A large number of through holes 71, 7 m formed in the base 2
..., 73... to diamond grinding wheel unit 12
．． It flows down in 13 directions.

On the other hand, the diamond grinding wheel units 12 and 13 have two types of rectangular shapes with short sides having circular arcs.
2 are located on the outer diameter side and are installed radially. As shown in detail in FIG. 4, the grindstone unit 12 (13) has a joint 9 made of synthetic resin fixed to the lower surface of the base 2, and a diamond grindstone 1 fixed to the other side of the joint 9. It will be done. The diamond grinding wheel 1 is made of a binder 20 made of a synthetic resin such as a phenol resin, in which diamond abrasive grains 21 having a predetermined particle size are scattered at a predetermined concentration, and a filler material such as Al2203 is mixed therein.

Since the present embodiment has the above-described configuration, the diamond grinding wheel device rIt3 has its rotary drive shaft 16 rotated by a motor or the like, and water is supplied from the hose to its central hole 17, and in this state, the tip of the diamond grinding wheel is rotated. C is brought into contact with the polished surface A of a stone 22 such as a tombstone. As a result, the diamond grindstone 1 allows water in the water reservoir space 6 to flow through the central hole 7 and a large number of circumferential upper holes 73 . . . , 7 . ... rotates at a predetermined circumferential speed with respect to the polished surface A of the stone 22, and grinds the polished surface A by a minute amount with the micro-cutting blade made of the diamond abrasive grains 21, thereby grinding the surface of the stone 1. Polish.

At this time, the circumferential speed of the diamond grinding wheel 1 increases in proportion to the distance from the center of the base 2, and therefore the amount of work increases as it is located on the outer diameter side. 7. Multiple holes on different circumferences without any problems. ..., 7.・
The diamond grinding wheel 1, located on the outer diameter side where the work is large, is always supplied with a large amount of fresh water to quickly wash away the polishing powder, and the diamond grinding wheel 1 and the stone 22 are also supplied with fresh water.
to ensure cooling.

Next, a partially modified embodiment will be described with reference to FIGS. 3(a) and 3(b).

The diamond grinding wheel 1 according to this embodiment is made by rolling diamond powder with a small particle size, for example, 30 [μm] in a binder 20.
] or less, preferably 8 [μm] or less diamond abrasive grains 3
are scattered at a relatively high concentration, and a filler material such as AβtO3 is mixed therein, and is formed into a protrusion shape with a relatively low height by a large number of grooves 27, and is in contact with the polished surface A. C has a thin parallel shape with a width B smaller than 2.5 [mm], preferably smaller than 2.0 [mm]. The thin parallel diamond grinding wheel 1 is attached to the unit 12 (or 13) by adhering to the joint 9.
) and are fixed radially to the lower surface of the base 2 as shown in FIG.

Since this embodiment has the above-mentioned configuration, similarly to the previous embodiment, a central hole 71 + a large number of circumferential upper holes 72 . . .
7. ...The diamond whetstone 1 rotates with more water flowing down, and the polished surface A of the stone is finished into a mirror surface with the fine abrasive grains 21.

At this time, in the case of a diamond whetstone 1 that has a wide contact area with the polishing surface A as shown in FIG. As shown in FIG. 4(b), 1w of water is interposed between the polished surface A of the stone 1 and the grindstone 2, and the water 1w
This prevents generation of sufficient contact pressure for grinding between the cutting edge by the diamond abrasive grains 21 and the grinding surface A, thereby making polishing by the diamond grindstone 1 difficult. In particular, if the water supplied to the polishing surface A is dirty and contains polishing debris or abrasive grains 23, the cutting edge formed by the diamond abrasive grains 21 will not reach the polishing surface A, making polishing completely impossible. It ends up.

In this embodiment, as shown in FIG. 4(a), the contact portion C of the diamond grinding wheel 1 has an extremely narrow shape, so water W is interposed between it and the polishing surface A. Also, because the contact area is extremely small, it is possible to secure a large contact pressure with the polishing surface A, and even with the extremely small diamond abrasive grains 21, the fine cutting edges and chip pockets Polished surface A can be finished to a mirror finish. Also, at this time, a large number of through holes 72 on different radii...
Clean water is always supplied to the polishing surface A from 73..., and the polishing debris and fallen abrasive grains 23 are washed away. In particular, as shown in FIG. If it has a strip shape, the through hole 7 located on the inner diameter side
The water from □ flows radially along the parallel grooves 27 due to the centrifugal force caused by the rotation of the device 1, and together with the water from the holes 73, polishing debris etc. are quickly washed away.

Next, an embodiment partially modified from FIGS. 5, 6, and 7 will be described.

If the diamond grinding wheel 1 has a parallel protruding shape as shown in FIG. 3, the width B is extremely narrow, so there is a risk that the grinding wheel 1 will break depending on the usage conditions. However, the embodiment shown in FIG. is an improvement on that. That is, the diamond grindstone 1 includes, in addition to a large number of parallel protrusions 30 extending in the radial direction, horizontal ribs 31 and edges 32 that laterally connect the parallel protrusions 30 at predetermined intervals. Consisting of a grid-like shape,
It has a strong structure.

Further, in the embodiment shown in FIG. 6, the diamond grindstone 2 is
It has a mesh shape formed by combining radial protrusions 33 and circumferential protrusions 35. A large number of cuts 36 are formed in the circumferential protrusion 35, and a through hole 71 is formed in the center of the base 2, and the radial protrusion 33 is formed on different radii. and circumferential protrusion 35
A small through hole 72 is formed in the hollow part 37 surrounded by
-* + 73... 7゜aha, 7! l...
・is formed.

Therefore, in this embodiment, a large number of narrow (2.5++ ua or less) protrusions 33, 35 are formed on the entire back surface of the base 2, and a large contact pressure is applied evenly to the protrusions 33, 35 over the entire surface. and the center hole 71 and the small hole 7□+7 covering the entire surface.
Water is supplied almost evenly over the entire surface of the base 2 from 317417s..., and the water is quickly discharged along the cuts 36... As a result, the protrusions 33 and 35 are connected to each other and have an advantageous structure in terms of strength, and the polishing process can be performed by applying a large contact pressure to the polishing surface, and the diamond grinding wheel 1 can perform the polishing process. A large amount of water can be supplied in the outer diameter direction according to the amount, and the polishing powder can be continuously and quickly discharged along the cut 36.

Further, in the embodiment shown in FIG. 7, a diamond grinding wheel unit 40.41 is configured in a disk shape, and an annular diamond grinding wheel 1 having a predetermined width is fixed to the edge of the disk shaped unit 40.41. ing. A large number of units are fixed to the lower surface of the base 2, with the large diameter unit 40 located on the outer diameter side and the inner diameter unit 41 located on the inner diameter side. The base 2 also has a central through hole 7. In addition, a large number of through holes 7. are formed on different circumferences so as to penetrate through the inner circumference of each unit 40, 41, respectively. ...73... is formed.

Therefore, in this embodiment as well, each unit 4
0..., 41... are directly supplied with clean water, and the diamond grindstone 1 performs the polishing process.

In addition, although the above-mentioned example explained a diamond whetstone of resin bond, it is of course applicable to other diamond whetstones such as metal bond, and the shape of the whetstone is not limited to the above-mentioned example. , can be similarly applied to grindstones of other shapes.

(g) As described in detail, according to the present invention, the case member (5) is fixed to the upper surface of the base (2) to provide the water reservoir space (6), and the base (2) has different Numerous through holes (7
1), (72), (7,),...
Since the liquid is supplied to different radii of (1), clean water can be directly supplied to the diamond grinding wheel (1) located on the outer diameter side, and it is possible to directly supply clean water to the diamond grinding wheel (1) located on the outer diameter side. In addition to reliably cooling the large outer diameter side, it also reliably washes away grinding debris and fallen abrasive grains, preventing deterioration of the stone and increase in fallen abrasive grains due to grinding heat, as well as preventing clogging, etc. As a result, the efficiency of polishing can be improved.

In particular, when using a diamond grinding wheel (1) with a small particle size, always supply clean liquid continuously to wash away grinding debris and fallen abrasive grains from all the polishing surfaces of the diamond grinding wheel, and remove minute cutting edges and chips. Even if it is in a pocket, it can be kept in a state where it can function reliably at all times,
Highly accurate polishing such as mirror finishing can also be performed using a diamond grindstone.

[Brief explanation of the drawing]

FIG. 1 is a bottom view showing a diamond grindstone device according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line 1--2 in FIG. Moreover, FIG. 3 is a figure which shows another Example, (a) is a bottom view which shows a diamond grindstone unit, (b) is its cross-sectional view. FIG. 4 is a diagram showing the operating state of the grindstone, in which (a) is a cross-sectional view according to the present invention, and (b) is a cross-sectional view according to a conventional example. Moreover, FIG. 5 is a bottom view showing an embodiment that is a partially modified version of the embodiment shown in FIG. 6 and 7 are bottom views showing diamond grindstone devices showing different embodiments, respectively. 1...Diamond whetstone 2...Base 3...
Diamond grindstone device 5...Case member 6...Water reservoir space 6...Through hole

Claims (1)

[Claims] 1. A diamond grinding stone device for stone polishing, in which a diamond grinding wheel having diamond abrasive grains scattered in a binder is fixed to the lower surface of a disc-shaped base, comprising: a case on the upper surface of the base; A water reservoir space is formed by fixing the member, and a large number of through holes are formed on the base at different radii, and the liquid supplied to the water reservoir space is passed through the through holes to the diamond grinding wheel. A diamond grinding wheel device for stone polishing that is guided on different radii.