JPH0454525B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a belt-type grinding device for rolling rolls, and in particular to grinding the outer surface of a rolling roll into an arbitrary shape by accurately knowing the wear amount of the rolling roll. Concerning what can be done.

[Technical background of the invention and its problems]

Instead of removing the rolling roll from the grinding machine body each time and performing the grinding work offline, the applicant proposed a belt-type grinding device that can perform the grinding work online (Japanese Patent Application No. 58-29230). ).
As shown in FIG. 10, in this device, a grinding machine main body 2 is movably supported by guide members 6, 6 provided along the axial direction of a rolling roll 1, and a grinding belt 3 is fed to the grinding machine main body. A reel 4 and a take-up reel 5 are attached, and the folded portion 3a of the grinding belt 3, which is stretched around these reels 4 and 5, is pressed against the outer circumferential surface of the mill roll 1, which is the object to be ground, by a pressing member 7 and slid into contact with it. It was designed so that

Then, using such a device, the outer surface of the rolling roll, where local wear is significant at a location corresponding to the plate end of the material to be rolled, is periodically ground.

By the way, the amount of wear in the axial direction on the outer surface of a roll is different, and by knowing this amount of wear, the amount to be ground can be determined. Therefore, in order to grind the outer surface of a roll roll into a constant or arbitrary shape, first It is necessary to know the amount of wear on the outer surface of the roll.

Conventionally, attempts have been made to determine the amount of wear using a non-contact sensor that does not touch the roll 1 at all, but it is difficult to determine the amount of wear accurately due to vibrations of the roll 1 and vibrations of the sensor mounting base. I can't, and so far I haven't been successful.

[Purpose of the invention]

The present invention uses a guide member that guides the main body of a grinding machine as a measurement standard in view of problems such as inhibition of grinding accuracy of the outer surface of the roll due to inaccurate measurement of the amount of wear of the roll based on the above-mentioned conventional technology. At the same time, by making the sensor in indirect contact with the rolling roll instead of in a non-contact manner, the above-mentioned drawbacks can be eliminated, preventing inaccurate measurements of the amount of wear, and reducing the vibration of the rolling roll. To obtain an excellent belt-type grinding device for a roll roll capable of grinding the outer surface of the roll into an arbitrary shape by knowing the accurate amount of wear without being affected by the wear of cooling water or the grinding belt.

[Summary of the invention]

The structure of the present invention in accordance with the above object includes a grinding machine main body movably supported by a guide member provided along the axial direction of a rolling roll, and a grinding machine body pressed from the main body to the rolling roll with the front surface of a pressing member. In a belt-type grinding device having a grinding belt that grinds the outer surface of a rolling roll in sliding contact, the grinding belt is pressed against the outer surface of the rolling roll with a pressing member and is in sliding contact over the entire axial length of the rolling roll. The distance between the pressing member and the outer surface of the rolling roll is measured by a distance sensor provided on the front surface of the pressing member, and the pressing force is applied to the pressing member by a displacement sensor provided on the rear surface of the pressing member. The displacement in the axial direction of the rolling roll is measured, and these measurement outputs are input to the control unit in correspondence with the position of the grinding machine main body in the axial direction of the rolling roll measured by the position sensor, and in this control unit, the distance sensor and The amount of wear over the entire axial length of the outer surface of the rolling roll is determined by calculating the output change between the measured output of the displacement sensor and the initial output determined in advance. The amount of grinding to be performed in the axial direction of the roll is calculated and stored, thereby accurately determining the amount of wear in the axial direction of the outer surface of the rolling roll with reference to the guide member. During the process, the grinding machine main body is run while controlling the pressing force or pressing time (running speed) applied to the pressing member corresponding to the amount of grinding in the axial direction of the rolling roll based on the above-mentioned stored information, As a result, a predetermined amount of grinding can be performed in the axial direction of the mill roll, and the gist thereof is that the mill roll can be ground into an arbitrary shape.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on FIGS. 1 to 9.

As shown in FIGS. 1 and 2, the guide member 6
A pressing member 7 that can move forward and backward in the radial direction of the rolling roll 1 is provided on the grinding machine main body 2 that is supported so as to be freely movable. This pressing member 7 is connected via a spring 12 to a movable rod 11 that moves forward and backward by the operation of a hydraulic cylinder 10 provided at the rear of the grinding machine main body 2, and protrudes from the front of the grinding machine main body 2. and,
A grinding belt 3 is pressed against and comes into sliding contact with the outer surface of the rolling roll 1 on the front surface of the pressing member 7, thereby grinding the outer surface of the rolling roll.

The pressing member 7 is provided with a distance sensor 13 and a spring displacement sensor 14, and the grinding machine main body 2 is provided with a piston rod displacement sensor 15.

The distance sensor 13 is integrally provided on the front surface of the pressing member 7 in order to measure the distance 8 between the front surface of the pressing member 7 and the rolling roll outer surface 1a via the grinding belt 3. The approximately T-shaped pressing member 7 includes a pressing portion and a rod portion, and the distance sensor 13 is embedded in the axial center of the pressing portion forming the front surface of the pressing member 7. Alternatively, distance sensors 13 may be further provided at both ends in the axial direction, for a total of three distance sensors, so that measurements can be made up to both ends. Further, in this case, the distance sensors 13 at both ends can be provided not on the pressing member 7 but on the brackets 17, 17 of the guide roller 16 that guides the grinding belt 3 to measure the entire width of the pressing member 7.

Since it is necessary to measure the distance without being affected by the presence of the grinding belt 3, an eddy current type, ultrasonic type, or X-ray type sensor is suitable as the distance sensor 13. Since it comes into contact with the rolling roll outer surface 1a via the grinding belt 3, it becomes an indirect contact sensor rather than a non-contact sensor.

The spring displacement sensor 14 is a spring 12
It is provided on the rear surface of the pressing member 7 in order to measure the relative displacement l between the pressing member 7 and the movable rod 11 due to expansion and contraction of the rod. As the spring displacement sensor 14, a sensor such as an actuation transformer or a magnet scale is suitable.

The piston rod displacement sensor 15 is a piston rod 18 that expands and contracts by the operation of the hydraulic cylinder 10.
In order to measure the displacement based on the guide member 6 of
It is provided at the rear of the grinding machine main body 2. As the piston rod displacement sensor 15, similarly to the spring displacement sensor 14, an actuation transformer, Magnescale, etc. are suitable. Since the piston rod 18 and the movable rod 11 move together, measuring the displacement of the piston rod 18 means measuring the displacement x of the movable rod 11 with respect to the guide member 6.

Note that if a stepping motor-controlled control cylinder capable of accurate positioning is used as the hydraulic cylinder 10, the amount of positioning can be grasped, so the above-mentioned piston rod displacement sensor 15
becomes unnecessary.

On the other hand, as shown in FIGS. 3 and 4, a position sensor 21 is provided in the traveling drive device 20 of the grinding machine main body 2. That is, a traveling driven device 24 and a traveling drive device 20 are provided, which extend a chain 23 to both sides of a housing 22 that supports the guide members 6, 6, and cause the grinding machine main body 2 to travel at a constant speed. This travel drive device 20 reduces the rotation of the hydraulic motor 25 by a reduction gear device 26.
This is achieved by transmitting the signal from the chain 23 to the chain 23 via the rotating shaft 27. The position sensor 21 is provided on one side of the outer circumference of the disk 28 fixed to the rotating shaft 27 in order to measure the number of rotations of the disk. Therefore, each time the grinding machine main body 2 comes to the turning point, the rotation speed of the disk 28 which rotates forward and backward is measured by the position sensor 21, thereby adjusting the grinding machine main body 2 in the axial direction of the rolling roll 1.
It becomes possible to measure the position. Note that it is also possible to use other sensors.

As shown in FIG. 5, the distance sensor 13, spring displacement sensor 14, piston rod displacement sensor 15, and position sensor 21 are electrically connected to a control section 30 to transmit a distance signal, a spring displacement signal, a piston rod displacement signal, and a position signal. Control unit 30
Enter. The output side of the control unit 30 is connected to oil 31a that adjusts the operation of the hydraulic cylinder 10, and outputs a valve opening/closing signal to adjust the operation of the hydraulic cylinder 10 and control the pressing force on the pressing member 7. Alternatively, the traveling speed may be controlled by adjusting the amount of oil using the oil level 31b and changing the rotation speed of the hydraulic motor 25.

To explain the functions of the control section 30, firstly, the wear amount △ of the rolling roll outer surface 1a is determined from the distance signal, spring displacement signal, and piston rod displacement signal.
Calculate. That is, as shown in FIGS. 6 and 7, the fixed length of the pressing member 7 from the front surface to the rear surface is A, and similarly the fixed length of the movable rod 11 is B,
Assuming that the position of the guide member 6 is the origin and the side of the roll 1 is positive, the length L from the guide member 6 to the outer surface 1a of the roll is generally calculated by the following formula.

L=δ+l+x+A+B (1) Similarly, the length L ₀ at the initial value is calculated using the following equation.

L ₀ = δ ₀ +l ₀ +x ₀ +A+B (2) Therefore, if the length L is the value after wear and the amount of deflection am' of the guide member 6 is considered, which is proportional to the pressing force F', the The amount of wear △ on the surface 1a is
It is obtained from equation (1) - equation (2).

Δ=(δ+l+x)−(δ ₀ +l ₀ +x ₀ )−am′ (3) This wear amount Δ is determined as the axial distribution of the rolling roll 1 by being synchronized with the position signal.

Second, the control unit 30 controls the rolling roll outer surface 1a.
The pressing force or running speed for grinding into a predetermined shape is calculated based on the wear amount Δ. That is, as shown in FIG. 8, the relative position of the desired shape B in the radial direction is determined by matching the peak coordinates of the desired shape B with respect to the initial shape A of the outer surface of the rolling roll with the peak value m of the wear amount shape c. Then, the axial gap G between the initial shape A and the desired shape B at that position is determined. From this gap amount G and the wear amount Δ, the amount D to be ground in the axial direction of the outer surface 1a of the rolling roll is calculated by the following formula.

D=G-△ (4) As shown in FIG. 9, the amount D to be ground obtained in this manner is proportional to the pressing force of the pressing member 7 or the traveling speed. Alternatively, it is converted into a running speed, and the control unit 30 stores the converted pressing force or running speed required along the axial direction of the rolling roll in its storage unit.

Now, in the above-described configuration, the hydraulic cylinder 10 is actuated to apply a constant pressing force to the pressing member 7, and the grinding belt 3 is pressed against the outer surface 1a of the rolling roll and is pressed along its entire length. The grinding machine main body 2 is made to travel once in one direction. The constant pressing force required at this time can be maintained even by vibrations of the rolling roll 1 etc.
A force sufficient to maintain sliding contact with a is sufficient, and a pressing force sufficient to grind the roll surface is not required. As the grinding machine main body 2 travels, the distance sensor 1
3. Signals corresponding to these are input to the control section 30 from the spring displacement sensor 14, the piston rod displacement sensor 15, and the position sensor 21.

This first running period becomes the rolling roll 1 wear amount measuring step.

Even in this process, there is vibration in the rolling roll 1, the grinding machine body 2, etc., so in order to accurately measure the amount of wear under this vibration, a sensor for measuring the amount of wear must be installed separately for the rolling roll 1. It is necessary to vibrate integrally without vibration or relative vibration.

However, in the above-mentioned wear measurement step, the distance sensor 13 that measures the distance between the rolling roll outer surface 1a and the front surface of the pressing member 7 is provided integrally with the pressing member 7. Since they are in contact via the belt 3, the rolling roll 1
Even if it vibrates, it moves together with this, and
Conversely, even if the guide member 6, the grinding machine main body 2, or the pressing member 7 vibrates, the vibration is transmitted to the rolling roll 1, but is absorbed and the distance sensor 13 does not vibrate independently. The relative distance from the rolling roll outer surface 1a is maintained stably. Moreover, since the distance sensor 13 is located on the back side of the grinding belt 3, it is not affected by vibrations generated on the grinding surface during grinding, cooling water, or wear caused by the grinding belt 3. In addition, as the distance sensor 13, an eddy current type,
Since ultrasonic and X-ray sensors are used, the distance measurement described above can be performed even when the grinding belt 3 is present.

Further, with reference to the guide member 6, a spring displacement sensor 14 and a piston rod displacement sensor 1 are also provided.
Since the displacement of the pressing member 7 and the movable rod 11 is measured in step 5, the axial displacement of the pressing member 7 and the movable member 11, which changes depending on the amount of wear on the outer surface of the rolling roll, can be expressed as the distance from the guide member 6. The total displacement with respect to the fixed length in the axial direction is measured by providing sensors to measure the displacement at all parts where the displacement occurs. Moreover, a correction factor is added to the measurement result of the total displacement.
Guide member 6 due to pressing force due to am'
Deflection is also taken into account. Then, the position sensor 21 measures the distance and displacement corresponding to the position in the axial direction of the rolling roll.

Therefore, the amount of wear calculated by the control unit 30 is accurate, and the amount of grinding in the axial direction of the rolling roll determined based on this amount of wear, as well as the pressing member required for grinding into the desired shape. The pressing force or running speed of No. 7 is also accurate and stored in the storage section.

Subsequently, the grinding process starts again in which the grinding machine main body 2 is made to travel, and the pressing force against the pressing member 7 or the traveling speed is controlled based on the valve opening/closing signal from the control section.
Through this control, the grinding belt 3 performs a predetermined amount of grinding over the entire axial length of the outer surface 1a of the rolling roll, thereby grinding the outer surface of the rolling roll into a desired shape. If the desired shape is a straight line, increase the amount of grinding by increasing the pressing force or slowing down the traveling speed where the amount of wear is small, and conversely, decreasing the pressing force or decreasing the traveling speed where the amount of wear is large. A valve opening/closing signal is output from the control unit 30 to control the hydraulic cylinder 10 or the hydraulic motor 25 so that the grinding speed is increased to reduce the amount of grinding and the roll system becomes uniform in the axial direction. Further, if the desired shape is a bulging shape, a valve opening/closing signal based on the shape is outputted from the control section 30 to control the pressing force of the pressing member 7 or the running speed of the device.

〔Effect of the invention〕

In summary, the present invention exhibits the following excellent effects.

(1) Since the pressing force that presses the grinding belt or the running speed of the device is controlled based on the information stored in the control unit, it is possible to perform grinding in an amount corresponding to the pressing force or running speed, and to adjust the rolling roll to any desired position. Can be ground into shape.

(2) Since the distance sensor is installed on the pressing member that presses the grinding belt, the distance sensor comes into indirect contact with the rolling roll and vibrates together, so it is not affected by the vibrations of the rolling roll, etc. By locating the pressing member, the distance between the pressing member and the outer surface of the rolling roll can be accurately measured because the pressing member is not affected by abrasion caused by cooling water or the grinding belt.
Moreover, this measured distance is grasped as a distance displacement from the reference guide member along with the axial displacement of the pressing member measured by the displacement sensor, and is also grasped as the axial displacement by the position sensor. Therefore, it is possible to accurately measure the amount of wear on the outer surface of the rolling roll. Therefore, the pressing force required to grind the roll into an arbitrary shape can be accurately obtained from the amount of wear.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of the front part of the grinding machine body showing a preferred embodiment of the belt-type grinding device for rolls according to the present invention, Fig. 2 is a plan view of the entire length of the grinding machine main body, and Fig. 3 is the same. A schematic plan view showing the entire device, FIG. 4 is a cutaway front view of the traveling drive device for driving the main body of the grinding machine, FIG. 5 is a block diagram showing the control circuit, and FIGS. 6 and 7. 8 is an explanatory diagram for measuring the amount of wear on the roll, FIG. 8 is an explanatory diagram for calculating the amount of grinding of the outer surface of the roll from the amount of wear, and FIG.
The figure is a correlation characteristic diagram between the pressing force of the grinding belt and the amount of grinding of the rolling roll, and FIG. 10 is a side sectional view of the previously proposed belt-type grinding device for rolling rolls. In the figure, 1 is a rolling roll, 1a is an outer surface of the rolling roll, 2 is a grinding machine body, 3 is a grinding belt, 6 is a guide member, 7 is a pressing member, 13 is a distance sensor, 14
is a spring displacement sensor, 21 is a position sensor, 3
0 is a control unit.

Claims (1)

[Claims] 1. A grinding machine main body that is movably supported by a guide member provided along the axial direction of the rolling roll, and a pressing member that presses and slides from the main body onto the rolling roll to grind the outer surface of the rolling roll. In a belt-type grinding device having a grinding belt, a distance sensor is provided on the front surface of the pressing member to measure the distance between this and the outer surface of the rolling roll, and a pressing force is provided on the rear surface of the pressing member and applied to the distance sensor. A displacement sensor that measures the axial displacement of the pressing member with respect to the guide member, a position sensor that measures the position of the grinding machine body in the axial direction of the rolling roll, and a position sensor that measures the position of the grinding machine body in the axial direction of the rolling roll. and a control unit that calculates and stores the amount of grinding of the rolling roll corresponding to the detected position of the position sensor based on the amount of wear, and controls the pressing force of the pressing member based on this stored information. A belt-type grinding device for rolling rolls.