JP2004330318A - Method of feeding lubricant/coolant for grinding, and grinding device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of feeding a lubricant/coolant and a grinding device using the method effective in reducing the applied quantity of a grinding fluid for lubricating or cooling in grinding. <P>SOLUTION: In the method of feeding the lubricant/coolant to the grinding surface of a grinding wheel, a nozzle 2 is disposed in proximity so that a distance between the rotating outer peripheral surface 12 of the grinding wheel 1 and the tip of the nozzle becomes an extremely small clearance only enough to discharge the lubricant/coolant. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of supplying a lubricating / cooling liquid used for lubricating and cooling a grindstone in a grinding process of a glass substrate or the like, and a grinding apparatus therefor.
[0002]
[Prior art]
Glass substrates are widely used in liquid crystal display devices and the like.
The glass substrate is subjected to grinding for the purpose of chamfering to prevent chipping or cracking starting from the edge portion, adjustment of external dimensions, and the like.
[0003]
In the grinding of glass substrates, etc., lubrication and cooling liquid such as pure water is sprayed to the processing point for lubrication or cooling in order to prevent seizure of diamond abrasive grains etc. of the grindstone and to secure the quality of the grinding surface. ing.
[0004]
Pure water used in such a field is expensive due to high purity required, and after use, contains grinding powder and the like, and wastewater treatment cost is also one of the factors of cost increase. Was.
Therefore, it is required to reduce the amount of pure water used for lubrication and cooling.
[0005]
The present applicant has previously proposed an invention in which cooling air is sprayed instead of cooling with pure water (Japanese Patent Application No. 2002-185143). However, the present invention does not require pure air without using cooling air. The present invention relates to a method for supplying a lubricating / cooling liquid which can be reduced in use and a grinding device therefor.
[0006]
[Patent Document 1]
Japanese Patent Application No. 2002-185143 [0007]
[Problems to be solved by the invention]
An object of the present invention is to provide a method for supplying a lubricating / cooling liquid which is effective for reducing the amount of a lubricating or cooling grinding liquid used in a grinding process and a grinding apparatus using the same.
[0008]
[Means for Solving the Problems]
The present invention has been made by carefully studying a method of efficiently winding a grinding fluid around a rotary grindstone.
The technical gist is that, in the method of supplying lubrication and cooling liquid to the grinding surface of the grinding wheel, the distance between the rotating outer peripheral surface of the grinding wheel and the nozzle tip should be as small as possible to discharge the lubrication and cooling liquid. And that the nozzles are arranged close to each other.
[0009]
Here, the fact that the nozzles are arranged close to each other so that the lubricating / cooling liquid is as small as possible so that the lubricating / cooling liquid can be discharged means that when the grinding liquid (lubricating liquid, cooling liquid) is discharged from the tip of the nozzle, it is wrapped around the grindstone surface. It means that the grindstone surface and the nozzle tip are arranged with such a small gap.
[0010]
More specifically, conventionally, when the grinding fluid is sprayed from the nozzle tip toward the grindstone, a relatively large interval is provided so that the grinding fluid sprayed from the nozzle tip spreads to some extent and hits the grindstone surface. And had a distance of at least 10 mm.
[0011]
In such a conventional method, although the spread of the grinding liquid on the surface of the grindstone is large, the rebound amount is larger than the amount wound around the grindstone surface, which is not efficient.
On the other hand, in the present invention, the surface of the grindstone and the tip of the nozzle are arranged close to each other so as to have a gap of 1 mm or less so that the grinding fluid discharged from the nozzle tip winds around the grindstone as it is.
Ideally, if the gap is as small as about 0.01 to 0.1 mm, a small amount of the grinding liquid can be sufficiently wound around the grindstone surface to perform grinding.
[0012]
The second technical gist lies in the provision of a grinding device capable of performing grinding with a small amount of grinding fluid as described above. The nozzle tip is provided with a very small gap between the rotating grindstone and the outer peripheral surface of the rotating grindstone. A grinding device provided with a lubrication / cooling liquid supply means having this nozzle so as to be located.
[0013]
Since the grindstone wears out and its diameter decreases due to its use, the nozzle tip moves forward with the grindstone rotating before use for grinding, then comes into contact with the grindstone surface, and then the nozzle tip recedes to a predetermined gap When the preset function is provided as described above, it is easy to maintain the interval between the tips of the nozzles on the grindstone surface in a predetermined range.
Here, when the nozzle tip is brought into contact with the rotating wheel, the nozzle tip is ground by the grindstone and the shape of the grindstone is transferred.
By transferring the shape of the grindstone to the nozzle tip in this way, a certain gap is likely to be obtained when the nozzle tip is then retracted to a predetermined gap.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows an example in which the present invention is applied to a grinder with a grooved grindstone.
FIG. 1 shows a view of the grinding apparatus as viewed from directly above.
The grindstone 1 rotates in the direction of W, and pure water for lubrication and cooling is discharged from the nozzle tip of the grindstone 1 using the nozzle 2.
The glass substrate 3 (material to be ground) advances in the direction V to be chamfered with respect to this grindstone.
[0015]
FIG. 2 shows an enlarged side view of the ground surface.
A groove 11 is formed on the outer periphery of the rotary grindstone 1, and the corner portion 31 of the glass substrate 3 hits the groove, and is ground and chamfered.
As the abrasive grains of the grindstone, diamond powder or the like is used.
Therefore, as shown in FIG. 3, the nozzle 2 is disposed on the outer peripheral surface 12 of the groove 11 of the grindstone 1 at a distance d of about 0.01 to 0.1 mm so that the nozzle tip 21 is located. .
Pure water discharged from the nozzle tip 12 is wound around the outer peripheral surface 12 of the grindstone groove as it is, so that a small amount of pure water may be discharged.
According to this method, the amount of pure water used can be reduced to 1/10 or less as compared with the conventional injection method.
Further, the nozzle 2 is made of a free-cutting material, and the tip of the nozzle is once applied while the grindstone 1 is rotated to transfer the shape of the grindstone to the nozzle side, and then a predetermined clearance d is obtained. The nozzle should be retracted.
[0016]
FIG. 4 shows an example in which the present invention is applied to a multi-grinding wheel having a flat outer peripheral surface.
The multi-grinding stones 1a and 1b are arranged up and down, the upper grinding stone 1a is rotated in the direction of W1, the lower grinding stone 1b is rotated in the direction of W2, and the rotation of the grinding stones while the glass substrate 3 is in contact with the side. By running parallel to the axis, the upper and lower edges of the glass substrate are chamfered.
[0017]
In the multi-grinding stone 1a, a pure water discharge nozzle 2a is arranged with a slight gap d for each grinding stone.
The multi-grinding stone 1b is also provided with a pure water discharge nozzle 2b with a gap d for each grinding stone.
The distance d between the nozzle tips 21a and 21b of the nozzles 2a and 2b and the outer peripheral surface of the grindstone is adjusted as follows.
First, before starting the grinding process, the nozzle is advanced while rotating the grindstone until the tips 21a and 21b of the nozzles hit the surface of the grindstone.
Then, the outer shape of the grindstone is transferred to the nozzle tip 21a of the nozzle 2a as shown in a perspective view of FIG.
Next, the nozzle position is set by retracting the nozzle by a predetermined distance d from this position.
This preset may be manual or automatic control.
FIG. 6 is a sectional view showing a state where the position of the nozzle tip is set.
In the example shown in FIG. 6, a multi-grinding wheel including three grindstones is used.
The outer shape of the grindstones a1, a2, a3 is transferred to the nozzle 2a, and the nozzle 2a is retracted so as to have a clearance d thereafter.
After the distance between the outer peripheral surface of the grindstone and the tip of the nozzle is set as described above, the grinding process is started.
Thereby, the position of the nozzle can be adjusted according to the wear of the grindstone.
[0018]
【The invention's effect】
In the present invention, since the gap between the surface of the rotary grindstone and the tip of the nozzle is set to be extremely small, the grinding fluid discharged from the nozzle tip winds around the surface of the rotary grindstone as it is, and the grinding point And it is used for lubrication and cooling efficiently with a small amount of grinding fluid.
As a result, the amount of the grinding fluid used can be greatly reduced as compared with the conventional injection method.
[Brief description of the drawings]
FIG. 1 shows a configuration view of a grinding device as viewed from above.
FIG. 2 is an enlarged side view of a chamfered portion of the glass substrate.
FIG. 3 shows a positional relationship between a grindstone and a grinding fluid supply nozzle.
FIG. 4 shows an example in which the present invention is applied to a grinding device using an outer peripheral surface grindstone.
FIG. 5 shows an example of a nozzle shape for a multi-grinding wheel.
FIG. 6 shows a positional relationship between a multi-grinding wheel and a nozzle.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 grooved grindstone 11 grindstone outer circumferential groove 12 grindstone outer peripheral surface 1 a, 1 b multi-grindstone 2 nozzle 21 a, 21 b nozzle tip 3 glass substrate (material to be ground)
31 Edge of glass substrate

Claims (3)

In the method of supplying the lubrication / cooling liquid to the grinding surface of the grindstone, the nozzles were arranged close so that the distance between the rotating outer peripheral surface of the grindstone and the nozzle tip was as small as possible to discharge the lubrication / cooling liquid. A lubricating / cooling liquid supply method characterized by the above-mentioned. A grinding machine comprising: a rotary grindstone; and a lubricating / cooling liquid supply unit having a nozzle such that a nozzle tip is located at a very small gap on an outer peripheral surface of the rotary grindstone. 3. The grinding method according to claim 2, wherein a preset function is provided so that the nozzle tip advances while the grindstone rotates and abuts on the grindstone surface, and then the nozzle tip retracts so as to have a predetermined gap. apparatus.

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