JPH07241753A - Deburring control device - Google Patents

Abstract

PURPOSE:To provide a deburring control device for automatically removing the end face burr of barstock such as bar steel with the appropriate chamfer quantity. CONSTITUTION:A deburring control device is provided with a grinding wheel 2 provided at a frame 1, a grinding wheel driving motor 4 for rotatory-driving the grinding wheel 2, a grinding wheel driving control device 5 for controlling the rotating speed of the grinding wheel driving motor 4, a grinding wheel position sensor 6 for detecting the position of the frame 1, a grinding wheel elevating driving motor for moving the grinding wheel 2 vertically toward the deburred face of treated material, a grinding wheel elevation control device 9 for controlling the vertical movement of the grinding wheel elevating driving motor 8, a grinding wheel diameter sensor 10 for optically detecting a grinding wheel diameter, and an arithmetic unit 11 for sending out correction output to the grinding wheel driving control device 5 and the grinding wheel elevation control device 9 on the basis of the previously inputted deburring depth and detection signals from the grinding wheel diameter sensor 10 and the grinding wheel position sensor 6. The constant control of the chamfer quantity can be thereby performed so as to be able to improve the processing efficiency of chamfering work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deburring control device for automatically removing burrs on an end surface of a bar material such as a steel bar.

[0002]

2. Description of the Related Art For example, when removing burrs on the end surface of a steel bar, the chamfering amount of the end surface is determined by the height position (stroke) of the grindstone, but the peripheral speed of the grindstone also changes due to wear of the grindstone during use. Therefore, to make the chamfering amount of the end face constant,
Every time it was worn, the grindstone was manually raised, and the deburring of the end face was carried out while visually checking the shaving condition, which was extremely troublesome to manage.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and automatically deburrs the end face of a steel bar or the like so that the chamfering amount becomes a constant amount in a constant processing time. It is an object of the present invention to provide a deburring control device that can be processed in a selective manner.

[0004]

In order to solve the above problems, the present invention employs means for automatically measuring the diameter of a grindstone and automatically controlling the position and peripheral speed of the grindstone based on the diameter.
That is, the present invention provides a grindstone rotatably provided on a gantry, a grindstone drive motor that rotationally drives the grindstone, a grindstone drive control device that controls the rotation speed of the grindstone drive motor, and a grindstone on the gantry. A grindstone position sensor for detecting the position of the grindstone with respect to the material to be processed, a grindstone lifting drive motor for vertically moving the grindstone on the pedestal toward the deburring surface direction of the material to be processed, and the vertical movement of the grindstone lifting drive motor. Controlling a whetstone lifting device, a whetstone diameter sensor for optically detecting a change in whetstone diameter by irradiating the wear surface of the whetstone with light, a deburring depth previously input, and the whetstone diameter sensor and whetstone It is provided with a calculation device that performs a calculation based on a detection signal from the position sensor and outputs a correction output to the above-mentioned grindstone drive control device and grindstone lifting control device based on the result. There is provided a deburring controller comprising. The grindstone position sensor is preferably a laser displacement device.

[0005]

[Operation] Since the change in the wheel diameter due to wear is automatically measured by the wheel diameter sensor, and the position and peripheral speed of the wheel are automatically controlled based on this, it is possible to automatically perform constant control of the chamfering amount. Becomes

[0006]

The present invention will be described below with reference to the illustrated embodiments. FIG. 1 schematically shows a deburring control device of the present invention. In FIG. 1, reference numeral 1 denotes a grindstone mount on which a disc-shaped or columnar grindstone 2 is rotatable (for example, 1800 r.p.
m.). A grindstone drive motor 4 is connected to the grindstone 2 via an endless belt 3 so that the grindstone 2 can be rotationally driven steplessly. A grindstone drive control device 5 for controlling the rotation speed of the grindstone drive motor 4 is connected. A grindstone position sensor 6 for detecting the position of the gantry 1 is arranged below the gantry 1, and an end surface (or deburring surface) 7a of a material 7 to be deburred (for example, steel bar material) to be deburred and The positional relationship with the grindstone 2 is detected.

A grindstone lifting drive motor 8 for vertically moving the gantry 1 together with the grindstone 2 at an angle of about 45 degrees is provided below the pedestal 1 toward the deburring surface 7a of the material 7 to be processed. . This grindstone lifting drive motor 8
Includes a grindstone lifting control device 9 for controlling the vertical movement thereof.
Are connected. Above the grindstone 2 is a grindstone diameter sensor 1
0 is provided, and the diameter of the grindstone is optically detected by irradiating the wear surface of the grindstone 2 with light.
The grindstone diameter sensor 10 is arranged so that the optical axis is the center of the grindstone 2.

As an example of the grindstone diameter sensor 10, a laser displacement device can be used. This laser displacement device applies laser light from a semiconductor laser to the worn surface of the grindstone 2 and changes the reflection position of the reflected light to cause the grindstone 2 to move.
And the change in the diameter of the grindstone 2 is detected.

Wheel diameter sensor 10 and wheel position sensor 6
An arithmetic device 11 is connected to both of the above, and a deburring depth setting device 12 is further connected to the arithmetic device 11.
The arithmetic unit 11 performs an arithmetic operation based on the deburring depth inputted in advance via the deburring depth setting device 12, and the detection signals sent from the grindstone diameter sensor 10 and the grindstone position sensor 6, Based on the result, a correction output is output to the grindstone drive control device 5 and the grindstone lifting control device 9, and the position of the grindstone 2 with respect to the deburring surface 7a of the material 7 to be processed and the rotational speed of the grindstone 2 are constantly and automatically controlled. It is a thing.

Next, the operation of the deburring control device will be described with reference to FIGS. 1 and 2. First, when the grindstone 2 has a new diameter, the operator manually operates the grindstone lifting control device 9
Is operated to bring the grindstone 2 into visual contact with the material 7 to be processed that has been rotatably conveyed through the groove portion of the spiral roll 13, and the output value from the grindstone diameter sensor 10 and the output from the grindstone position sensor 6 at that time. The values are input to the arithmetic unit 11, and these input values are input to the arithmetic unit 11 when the wear of the grindstone is zero and the deburring depth is zero.
₀ (distance between the grindstone diameter sensor 10 and the peripheral surface of the grindstone 2 having a new diameter opposite thereto) and Y ₀ (height position of the grindstone 2 having a new diameter), and thereafter, Enter automatic driving. This manual operation is performed even with a new grindstone because there is a manufacturing error in the diameter of the grindstone.

At the start of the automatic operation, the rotational speed of the grindstone 2 is controlled to the speed N ₀ at the time of a new diameter (D ₀ ) stored in the arithmetic unit 11 in advance, while the height of the grindstone 2 at the time of rising is controlled. The position Y is Y = Y ₀ + [α × (1 / √2)] (see FIG. 2), where α is a deburring amount preset by the deburring depth setting device 12. Is calculated, and based on this, the grindstone lifting drive motor 8 is operated via the grindstone lifting control device 9.

Further, during the automatic operation, when the grindstone 2 is worn due to the accumulation of the number of deburring times and the output value from the grindstone diameter sensor 10 changes from X ₀ to X ₁ , the arithmetic unit 11 detects the rising of the grindstone 2. The proper height position Y is Y = Y ₀ + (X ₁
-X ₀ ) + [α × (1 / √2)], while the deburring amount of the grindstone 2 per unit time is kept constant, the rotational speed N of the grindstone 2 is N = N ₀ × [D ₀ / {D ₀
-(X ₁ -X ₀ )}], and based on these corrected values, the grindstone lifting drive motor 8 and the grindstone drive motor 4 are respectively driven via the grindstone lifting control device 9 and the grindstone drive control device 5. Is activated. In addition, normally, the material 7 to be processed makes one rotation, and thus the deburring by the grindstone 2 is completed. In this way, appropriate control of the height of the grindstone and the rotation speed of the grindstone according to the wear of the grindstone is continuously performed until the grindstone reaches a predetermined disposal diameter.

[0013]

As described in detail above, according to the present invention,
The grinding wheel diameter sensor automatically measures the change in the grinding wheel diameter due to wear, and the position and peripheral speed of the grinding wheel are automatically controlled based on this, which makes it possible to control the chamfering amount at a constant level and to improve the processing efficiency of chamfering work. It is possible to improve and reduce running cost by extending the grindstone replacement time.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing an embodiment of a deburring control device of the present invention.

FIG. 2 is a view for explaining the relationship between the deburring depth and the height position of the grindstone in the deburring control device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Whetstone stand 2 ... Whetstone 3 ... Belt 4 ... Whetstone drive motor 5 ... Whetstone drive control device 6 ... Whetstone position sensor 7 ... Processing material 8 ... Whetstone lifting drive motor 9 ... Whetstone lifting control device 10 ... Whetstone diameter sensor 11 ... Arithmetic device 12 ... Deburring depth setting device

Front page continued (72) Inventor Mitsutoshi Kubo 12 Nakamachi, Muroran City, Hokkaido Nittetsu Hokkaido Control System Co., Ltd. (72) Inventor Hiroomi Takahashi 12 Nakamachi, Muroran City, Hokkaido Nittetsu Hokkaido Control System Co., Ltd. (72) Inventor Tadao Yamada 1 Wanowari, Arao-cho, Tokai-shi, Aichi Aichi Steel Co., Ltd. (72) Inventor Nao Iwasaki Wano-wari, Arao-cho, Tokai-shi, Aichi Aichi Steel Co., Ltd.

Claims (2)

[Claims] 1. A grindstone rotatably provided on a mount,
A whetstone drive motor that rotationally drives the whetstone; a whetstone drive control device that controls the rotational speed of the whetstone drive motor;
A grindstone position sensor that detects the position of the grindstone on the pedestal with respect to the material to be processed, a grindstone lifting drive motor that moves the grindstone on the pedestal up and down in the direction of the deburring surface of the material to be processed, and the grindstone lifting drive motor Of the above-mentioned vertical movement control device for controlling the whetstone, a whetstone diameter sensor for optically detecting a change in the whetstone diameter by irradiating the wear surface of the whetstone with light, a deburring depth previously input, and A deburring control device comprising: a calculation device that performs a calculation based on detection signals from a grindstone diameter sensor and a grindstone position sensor, and outputs a correction output to the grindstone drive control device and the grindstone lifting control device based on the result. . 2. The deburring control device according to claim 1, wherein the grindstone position sensor comprises a laser displacement device.