JPH0642936A - Roll profile meter - Google Patents

Abstract

PURPOSE:To detect the roll profile of a rolling roll after the influence of the temperature of the roll has been removed. CONSTITUTION:A displacement meter 6 and thermometers 8 are installed on a holder 4 which is run on a reference bar 2 which is parallel to the axial direction of a roll 1. The profile of the roll which has removed the influence of thermal expansion is found by a roll profile operation device 14 via a roll radial-direction thermal-expansion calculating device 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll profile meter for detecting a roll axial profile of a roll in strip rolling.

[0002]

2. Description of the Related Art The roll profile in the roll axial direction during rolling has a great influence on the plate shape such as plate crown, belly stretch, and edge stretch, which are important product qualities.
Accurate estimation or detection is very important for producing high quality rolled material.

For such a purpose, as a device for detecting a roll profile, in Japanese Utility Model Laid-Open No. 128289/1990, a non-contact displacement gauge is mounted on a horizontally movable holder and movable in the roll axial direction. A roll profile meter for detecting a roll profile in the roll axial direction by the configuration is disclosed.

[0004]

However, the rolling roll after use has a considerably high temperature due to the plastic deformation heat of the rolled material during rolling and, in the case of hot rolling, the effect of the high temperature rolled material. Is usually rising. For this reason, there is a large amount of thermal expansion, and it is inevitable that a large error will occur if the dimensions are measured as they are. However, since the roll profile meter cannot accurately detect the roll profile without waiting a long time until the roll is completely cooled, the waiting time before the start of measurement is long. Also, in order to secure the cooling time of the roll that enables accurate measurement, one rolling roll (rolling → grinding → rolling)
There is a problem that the cycle time for rotating the machine becomes unnecessarily long, which hinders the operation, or that many spare rolls must be prepared.

The present invention has been made in view of the above points, and by immediately estimating the effect of thermal expansion of a rolling roll even when the temperature of the roll is high, it is possible to accurately detect the roll profile. It provides a profile meter.

[0006]

The temperature distribution of the roll largely differs in the axial direction of the roll, and also greatly changes depending on the rolling conditions under which the roll is rolled. Therefore, the present invention has been made based on the finding that it is necessary to detect the roll temperature distribution in the roll axial direction in order to study the influence of heat on the roll.

That is, according to the present invention, a reference bar provided in parallel with the axis of the roll, a holder movable horizontally on the reference bar, a position detecting device for detecting the position of the holder on the reference bar, Fixed to the holder, a displacement meter to measure the distance to the roll surface, a thermometer to measure the roll surface temperature that is installed in the reference bar multiple, of the roll from a plurality of thermometer output measured by the thermometer A calculation device for calculating a diametrical direction thermal expansion amount; and a calculation device for calculating a roll diametrical direction displacement amount from the displacement amount by the displacement meter, and subtracting the roll width direction thermal expansion amount from the displacement amount. It is a characteristic roll profile meter. Incidentally, a thermometer for measuring the roll surface temperature may be fixed to the holder together with a displacement meter,
Alternatively, a plurality of the displacement gauges may be fixed to the reference bar together with the thermometer.

[0008]

The basic concept of the present invention will be described. First, a plurality of thermometers are provided on a reference bar parallel to the roll axis direction.
The thermometers may be arranged at equal intervals or may not necessarily be arranged at equal intervals. The thermometer may be a contact type or a non-contact type. Next, the holder is run on the reference bar and the non-contact displacement gauge is installed on it. The position of the holder is detected by a position meter. By doing so, the distance from the roll surface to the displacement gauge can be measured at each position in the roll axial direction. This distance is converted into a displacement in the roll diameter direction by a computing device. On the other hand, the surface temperature distribution of the roll in the axial direction is measured by a thermometer arranged on the reference bar. From this surface temperature distribution and the measured values of the roll diameter direction displacement, the amount of thermal expansion in the diameter direction of the roll at each part in the roll axial direction can be accurately estimated. Therefore, by correcting the roll thermal expansion amount in the roll diameter direction to the measured displacement amount, it is possible to detect the roll profile with high accuracy.

Further, instead of arranging a plurality of thermometers on the reference bar, if one thermometer is fixed to the holder together with the displacement gauge, the holder can be moved,
The roll surface temperature at each position and the distance to the roll can be measured simultaneously. This method takes a little time, but only one thermometer is required, and it is possible to more easily measure the roll profile with the thermal expansion corrected.

On the contrary, by disposing a plurality of thermometers and a plurality of displacement gauges on the reference bar, the surface temperature at each position on the roll surface and the displacement in the roll diameter direction can be measured instantaneously over the entire roll axial direction. Therefore, the roll profile whose thermal expansion is corrected can be quickly detected. In addition, by continuously measuring, it is possible to follow changes in the roll profile with time.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a plurality of thermometers are attached to the reference bar according to the present invention will be described with reference to FIG. A holder traveling device 10 equipped with a holder position detection device, a holder 4 traveling on the reference bar 2 in parallel with the axial direction of the roll 1, and a displacement meter 6 for measuring a distance to a roll surface installed on the holder 4. , A sensor unit including a plurality of thermometers 8 installed on the reference bar 2 is installed in contact with the roll to be measured, and the temperature distribution in the roll axial direction is input to the roll diameter direction thermal expansion amount calculation unit 12 to determine the roll diameter. The direction thermal expansion amount is calculated, and the thermal expansion amount and the holder traveling device 10 are calculated.
By inputting the displacement gauge output when the holder is run from the end of the roll to the other end to the roll profile calculation unit 14, an accurate roll profile corrected for thermal expansion is detected.

Next, an embodiment in which the thermometer is attached to the movable holder together with the displacement gauge will be described with reference to FIG. Holder traveling device 1 equipped with a holder position detection device
With 0, a sensor unit including a holder 4 that runs on the reference bar 2 in parallel with the axial direction of the roll 1, a displacement meter 6 that measures the distance to the roll surface installed on the holder 4, and a thermometer 8 is measured. The temperature distribution in the axial direction of the roll when the holder traveling device 10 travels the holder from one end of the roll to the other end is input to the roll diameter direction thermal expansion amount calculation unit 12. By calculating the thermal expansion amount in the diameter direction of the roll and inputting the thermal expansion amount and the displacement gauge output to the roll profile calculation unit 14,
Detect an accurate roll profile with thermal expansion correction.

[0013]

According to the present invention, accurate measurement is possible without being affected by the thermal expansion of the roll, and there is no need to wait until the roll is completely cooled, and the measurement timing is not limited. Calibration of the roll profile prediction model and various controls using the roll profile value measured by this roll profile meter can be easily performed.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment according to the present invention.

FIG. 2 is an explanatory view showing an embodiment according to the present invention.

[Explanation of symbols]

 1 Roll 2 Reference Bar 4 Holder 6 Displacement Meter 8 Thermometer 10 Holder Traveling Device 12 Roll Diameter Thermal Expansion Calculator 14 Roll Profile Calculator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Fumihiko Ichikawa, 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba Prefecture Technical Research Division, Kawasaki Steel Co., Ltd. (72) Kazuo Arai, 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba (72) Inventor, Soichiro Oda, 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Co., Ltd. Chiba Works

Claims (3)

[Claims] 1. A reference bar provided parallel to the axis of a roll, a holder that can move horizontally on the reference bar, a position detection device that detects the position of the holder on the reference bar, and a holder fixed to the holder. The displacement gauge for measuring the distance to the roll surface, a thermometer for measuring the roll surface temperature provided in the reference bar, and the diametrical heat of the roll from the thermometer outputs measured by the thermometer. An arithmetic unit for calculating an expansion amount, and an arithmetic unit for calculating a roll diameter direction displacement amount from the displacement amount by the displacement meter and subtracting the roll width direction thermal expansion amount from the displacement amount. Roll profile meter. 2. The roll profile meter according to claim 1, wherein a thermometer for measuring the roll surface temperature is fixed to the holder together with a displacement gauge. 3. The roll profile meter according to claim 1, wherein a plurality of the displacement gauges are fixed to the reference bar together with the thermometer.