JP2000218530A - Surface grinder - Google Patents

Abstract

(57) [Problem] To provide a surface grinder capable of automatically performing high-precision grinding with good work efficiency even when a grindstone is worn or clogged. A grinding wheel for grinding a work (object to be ground), a table on which the work is mounted and which moves left and right, and an NC (numerical control) control panel for controlling a grinding amount of the work. In the surface grinding machine, comprising a laser displacement meter for measuring the amount of displacement of the grinding wheel above the grinding wheel, and an analyzer for analyzing a signal from the laser displacement meter, and the analysis result of the analyzer is the said The configuration is such that feedback is provided to the NC control panel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface grinder, and more particularly to a surface grinder using a grindstone to grind an object to be ground.

[0002]

2. Description of the Related Art FIG. 3 is a side view showing a conventional surface grinder. A plane representing this side surface is referred to as a zy plane. 1
1 is a grindstone, 12 is a table, and 13 is a work, that is, an object to be ground.

[0003] First, a grindstone 11 is mounted on a surface grinder. Then, in the initial state, the preform is generated or the sharpening is incomplete in the grindstone 11, so the shaping and sharpening of the grindstone 11 is performed using a dresser, a copper plate, or the like with the grindstone 11 attached. The dresser sharpens the grindstone 11, and the sharpening means that the surface of the grindstone 11 is made uniform and the work 13 can be ground by giving an appropriate roughness.

[0004] The table 12 is capable of placing the work 13 thereon and moving to the left and right. Since the grindstone 11 rotates at a fixed place, the table 12 is reciprocated to move the work 13.
Grinding. The amount of cut per reciprocation, the number of rotations of the grinding wheel, etc. are N
It is managed by a C (numerical control) control panel. In addition,
FIG. 3 does not show the NC control panel. Therefore, whetstone 1
Since the number of rotations of 1 and the amount of cut per reciprocation of the table 12 are known, if the material of the work 13 is determined, the number of rotations of the grindstone 11 and the number of reciprocations of the table 12 for finishing to predetermined dimensions are automatically determined. Is determined.

[0005] The grindstone 11 becomes clogged and wears as the grinding is repeated, so it is necessary to perform shaping and dressing each time. Here, the term “clogging” refers to a state in which the surface of the grindstone 11 is provided with an appropriate roughness, but the unevenness forming the roughness disappears, and the work 13 cannot be ground. Generally, the clogged concave portion is filled with a grinding object. Also, wear means that the grindstone decreases and the diameter decreases.

[0006] Usually, the time of performing this shaping and dressing is as follows:
The operator listens to the sound during grinding and performs it when an abnormal sound occurs.

[0007]

The conventional surface grinder has the following problems.

When grinding a relatively soft iron-based work, the wear of the grindstone 11 does not progress so much. However, when grinding a super-hard work, the wear of the grindstone tends to progress.
Therefore, the diameter of the grinding wheel 11 changes during grinding,
It cannot be finished to a predetermined size.

Therefore, the dimensions of the work are measured at the time of completion of the grinding, and when the dimensions are insufficient, the grinding is performed again.

[0010] Further, since the above-mentioned judgment of an abnormal sound during grinding is performed by the operator, variations are liable to occur due to individual differences, and this is a difficult task for an unskilled person.

Accordingly, an object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to provide a surface grinding method capable of automatically performing high-precision grinding with good work efficiency even when the grinding wheel is worn or clogged. To provide a board.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above objects, the present invention provides a grindstone for grinding a work (object to be ground), a table on which the work is placed and which moves left and right, and a grinding of the work. In a surface grinding machine comprising an NC (numerical control) control panel for controlling an amount, a laser displacement meter for measuring a displacement amount of the grindstone above the grindstone and a signal from the laser displacement meter are analyzed. An analysis device is provided, and an analysis result of the analysis device is fed back to the NC control panel.

Further, the laser displacement meter and the analyzer are configured to calculate an insufficient grinding amount to the NC control panel and feed back an optimal cutting amount when the grinding wheel is worn.

Further, the laser displacement meter and the analyzer are configured so that when the grinding wheel is clogged, a signal is sent to the NC control panel to automatically dress the grinding wheel.

[0015]

FIG. 1 is a front view showing an embodiment of a surface grinder according to the present invention, and FIG. 2 is a side view thereof. The plane representing the front is the zx plane, and the plane representing the side is the z
-Set to the y-plane. 1 is a grindstone, 2 is a table, 3 is a work, 4 is a laser displacement gauge, 5 is a stage, 6 is an analyzer,
7 is an NC control panel, and 8 is a dresser.

A laser displacement meter 4 is installed above the grindstone 1. The laser displacement meter 4 is attached to a stage 5 driven in x and y directions. The stage 5 is moved in the x and y directions, and the displacement in the z direction at each position is measured. Then, the measured value is sent to the analysis device 6, and the grinding stone 1
The surface condition of the device is image-analyzed to determine whether clogging or wear has occurred. When the state of the grinding wheel 1 is analyzed by the analysis device 6, the analysis result is sent to the NC control panel 7 of the surface grinding machine.

When the grindstone 1 is worn, that is, when the diameter of the grindstone 1 is reduced, the laser displacement meter 4 and the analyzer 6 calculate the insufficient grinding amount on the NC control panel 7 and determine the optimal cutting. It is configured to feed back the charging amount.

When the grinding wheel 1 is clogged,
The laser displacement meter 4 and the analyzer 6 send the signal to the NC control panel 7 so that the dresser 8 installed at the end of the table 2 comes to the lower part of the grindstone 1 and is automatically dressed.

The above operation can be performed even while the work 3 is being ground. Therefore, if the grindstone 1 is clogged while the work 3 is being ground, the grinding operation is temporarily stopped and the grindstone 1 is dressed. After the completion, the work of grinding the work 3 is performed again.

As described above, the laser displacement meter 4 for observing the grindstone 1 is installed on the surface grinder, and the laser displacement meter 4 is provided.
The analysis signal is analyzed by the analysis device 6, and the analysis result
Since the work is sent to the control panel 7, the work efficiency is high and high-precision grinding can be automatically performed.

In this embodiment, the surface grinder has been described. However, any other grinder using a grindstone such as a copying grinder, a jig grinder or the like can similarly use the technique disclosed in the present invention.

[0022]

The surface grinding machine according to the present invention comprises a laser displacement meter for measuring a displacement amount above a grinding wheel, and an analyzer for analyzing a signal from the laser displacement meter, and an analysis result of the analyzer is provided. Since the configuration is such that feedback is provided to the NC control panel, high-precision grinding with high working efficiency can be automatically performed.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a surface grinding machine according to the present invention.

FIG. 2 is a side view of the surface grinding machine shown in FIG.

FIG. 3 is a side view of a conventional surface grinder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Whetstone 2 Table 3 Work 4 Laser displacement meter 5 Stage 6 Analysis device 7 NC control panel 8 Dresser 11 Whetstone 12 Table 13 Work

Claims (3)

[Claims] 1. A grinding wheel for grinding a work (object to be ground), a table for mounting the work and moving left and right, and an NC (numerical control) control panel for controlling a grinding amount of the work. A surface grinding machine comprising: a laser displacement meter for measuring the amount of displacement of the grinding wheel above the grinding wheel, and an analyzer for analyzing a signal from the laser displacement meter, and the analysis result of the analyzer is A surface grinder characterized in that it is configured to be fed back to the NC control device. 2. The laser displacement meter and the analyzing device are configured to calculate an insufficient grinding amount to the NC control panel and feed back an optimal cutting amount when the grinding wheel is worn. The surface grinding machine according to claim 1, wherein: 3. The laser displacement meter and the analyzer are characterized in that when the grinding wheel is clogged, a signal is sent to the NC control panel to automatically sharpen the grinding wheel. The surface grinding machine according to claim 1, wherein