JPS63281707A - Measuring device for preceding rate - Google Patents

Abstract

PURPOSE:To improve accuracy of measuring a preceding rate by calculating the rolled stuck between stands based on a calculated value of pulse signals transmitted following a looper roll rotation and a measured value by a tension meter, then using this length and pulse signals due to the rolling roll rotation. CONSTITUTION:Based on the measured value of the pulse signals from a 2nd pulse transmitter 11 transmitting in accordance with the rotation of the looper roll 10 and the tension value measured by the tension meter 12, a slip correction between the looper roll 10 and the rolled stock 3 is performed by a 1st arithmetic means 14, the length of the rolled stock 3 between stands is calculated. Based on the pulse signals from the 1st pulse transmitter 7 in accordance with the rotation of the rolling roll 1 on a prescribed period and the length of the rolled stock 3, the preceding rate of the rolling is calculated by the 2nd arithmetic means 15. In this way, in an arbitrary period, the length of the rolled stock 3 between the stands are accurately obtained to measure the preceding rate in high accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the ratio of the speed difference between the speed of a rolled material and the speed of a rolling roll to the rolling speed in a continuous rolling mill such as a tandem rolling mill. That is, the present invention relates to an advanced rate measuring device that measures an advanced rate.

(Prior Art) The advance rate is an important rolling factor that cannot be ignored in a continuous rolling mill, and the rolling position, roll speed, etc. of the rolling mill are determined and set based on this advance rate. Therefore, by measuring the advance rate with high accuracy, the setting accuracy of the rolling mill can be improved, and the dimensional accuracy of the plate thickness, shape, etc. of the rolled material can be increased.

Therefore, as an advanced rate measurement technology, for example, JP-A-53-2
4873, and will be explained with reference to the block diagram shown in FIG. 2. The rolled material 3 is rolled between the rolling roll 1 of the first rolling mill and the rolling roll 2 of the second rolling mill, which are arranged between the stands. When entering the roll 1, the load cell 4 sends a bite signal to the pulse counter 5 to start counting. When the rolled material 3 further advances and enters the rolling rolls 2, the load cell 6 sends a biting signal to the pulse counter 5, causing the pulse counter 5 to stop counting.

Here, the number of counted pulses at this time is assumed to be N. Further, the rolling roll 1 is rotationally driven by a drive motor 6, and this rotation is detected by a pulse transmitter 7, and the pulses are sent to a pulse counter 5. The pulse counter 5 calculates the number n of pulses generated during one rotation of the rolling roll 1.
is counted.

Here, if the diameter of the rolling roll 1 is D, the average advance rate f from the time when the tip of the rolled material 3 enters the first rolling mill until it enters the 12th rolling mill is f −shi÷(πD
N/n)-1-(1).

[Problem that the invention seeks to solve]

Therefore, as described above, the technology measures the advance rate when the tip of the rolled material 3 enters, and the inter-roll gap and O-roll speed of the rolling rolls 1 are set from the measured advance rate. It turns out. However, rolled material 3
If the tip of the rolled material 3 is warped or if the rolled material 3 between the stands progresses in a loop, the quality of the rolled material 3 will not match the distance 11L between the stands. In this case, it becomes difficult to obtain an accurate advance rate. Moreover, even if the advance rate is determined by the approach of the tip of the rolled material 3 and the gap between the rolls is set, the difference between the set value and the target value will be large when the rolling operation reaches a steady state. It may become impossible to roll with high accuracy.Also,
The reason why the rolled material 3 progresses in a loop is also due to the tension of the rolled material 3 between the stands, and the above technology does not take this tension into account at all, and the influence of this is important when determining the advance rate. This is an error.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an advance rate measuring device that can accurately determine the length of a rolled material between stands in any given period and measure the advance rate with high accuracy.

(Means for Solving the Problems) The present invention provides a first pulse transmitter that transmits a pulse signal in accordance with the rotation of a rolling roll, and a second pulse transmitter that transmits a pulse signal in accordance with the rotation of a louver roll disposed between the rolling mills. A transmitter, a tension meter that is installed on the louver roll and measures the tension of the rolled material between the stands, and a tension meter that measures the tension of the rolled material between the stands, and a tension meter that measures the tension of the rolled material between the stands. and a 1'14 calculation means for calculating the length of the rolled material between the stands by performing slip correction between the stands and the rolled material; The present invention is an advancement rate measuring device which attempts to achieve the above object by being provided with a second calculation means for calculating the advancement rate of rolling based on the length of the rolled material determined by the control means.

[Effect]

By providing such means, the first calculation means calculates the difference between the louver roll and the rolled material based on the count value of the pulse signal from the second pulse transmitter and the tension value measured by the tension meter during a predetermined period. The length of the rolled material between the stands is calculated by performing slip correction, and the second calculation means calculates the count value of the pulse signal from the first pulse transmitter during a predetermined period and the length of the rolled material obtained by the first calculation means. Calculate the rolling advance rate based on the length.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. Note that the same parts as in FIG. 2 are given the same reference numerals, and detailed explanation thereof will be omitted.

FIG. 1 is a block diagram of an advanced rate measuring device. Rolling roll 1
and the rolling roll 2, that is, between the stands, the tension of the rolled material 3 between the stands is f! A louver roll 10 for aw is arranged and driven by a drive motor (not shown). The louver roll] 0 is provided with a second pulse generator 11 that emits pulses in accordance with the rotation of the louver roll 10, and is also provided with a tension meter 12 that measures the tension of the rolled material 3 between the stands. Note that the pulse transmitter 7 functions as a first pulse transmitter. Reference numeral 13 denotes an advanced rate calculating device, which calculates the difference between the louver roll 10 and the rolled material 3 based on the count value of the pulse signal from the second pulse transmitter 11 and the tension value measured by the tension meter 12 during a predetermined period. A first calculation means 14 calculates the length of the rolled material 3 between the stands by performing slip correction, and a pulse signal from the first pulse transmitter 7 during a predetermined period and the rolled material determined by the first calculation means. The second step is to calculate the rolling advance rate based on the length of 3.
It has the capability of working with the calculation means 15. Note that a counter 16 is provided, and this counter 16 counts the pulse signal from the first pulse transmitter 7 and the pulse signal from the second pulse transmitter 11.

With such a configuration, the rolling material 3 enters the rolling roll 1 and is rolled, then passes through the looper roll 10, reaches the next rolling roll 2, and is rolled by this rolling roll 2.

At this time, pressure is applied to the rolled material 3 in the looper roll 10 according to the tension of the rolled material 3 between the stands. Now, when the measurement start signal 3a is input to the advanced rate calculation device 13 during such rolling, the counter 16 receives the pulse signal from the first pulse transmitter 7 and the pulse signal from the second pulse transmitter 11. and start counting separately.

At the same time, the counter 16 starts counting pulse signals of a predetermined period transmitted by an internal pulse oscillator (not shown). Furthermore, at the same time, the first calculating means 14 receives the tension signal from the tension meter 12 and calculates the slip correction coefficient α between the looper roll 10 and the rolled material 3. Then, when a predetermined period of time has elapsed and the measurement end signal Sb is input to the advanced rate calculating device 13, the counting operation of the counter 16 is stopped. Here, if the count value of the pulse signal from the first pulse generator 7 is nl, the count value of the pulse signal from the second pulse generator 11 is n2, and the count value of the pulse signal from the internal pulse generator is N, then ,
The counted values n2 and N are sent to the first calculating means 14, and the counted values rN and N are sent to the second calculating means 15. and,
The first calculating means 14 that receives the count values n2 and N calculates the following equation to determine the length of the rolled material 3 between the stands with the slip between the looper roll 10 and the rolled material 3 corrected.

π・D2・α・N/n2 ...2In addition,
D2 is the diameter of the looper roll 10. The first calculating section 14, which has determined the length between the stands of the rolled material 3 in this way, sends this length to the second calculating means 15. The second calculating means 15 calculates the length of the rolled material between the stands, and further calculates the following equation based on the count value n1 of the pulse signal from the first pulse transmitter 11 to obtain the advance rate f. That is, f-(π・D2・α・N/n2)÷(π・Dt・N/nl)−1...(3).

In this way, in the above embodiment, the slip between the looper roll 10 and the rolled material 3 is determined based on the count value of the pulse signal from the second pulse transmitter 11 and the tension value measured by the tension meter 12 during a predetermined period. The length of the rolled material 3 between the stands is calculated by performing correction, and the pulse signal from the first pulse transmitter 7 and the length of the rolled material 3 during the same predetermined period are calculated.
Since the rolling advance rate f is calculated based on the length of the rolled material 3 between the stands, the slip is corrected and
It is possible to determine the exact length of the , and from this length, the advance rate f can be measured with high precision. Further, the timing for measuring this advance rate f may be any timing as long as the rolling material 3 is being rolled, and therefore, it is possible to measure the advance rate f during continuous rolling from the accurate advance rate f during rolling. The inter-roll gap, roll speed, etc. of the rolled rolls 1 can be set. Thereby, the dimensional accuracy of plate thickness, shape, etc. can be improved, and furthermore, plate threading troubles due to lost tension and overtension can be reduced. Moreover, the measurement start signal 3a and the measurement end signal sb
The advance rate f can be measured with high accuracy even if the interval between the two and the two is set arbitrarily.

Note that the present invention is not limited to the above-mentioned embodiment, and may be modified without departing from the spirit thereof.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to provide an advance rate measuring device that can accurately determine the length of a rolled material between stands in any given period and measure the advance rate with high accuracy.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of an advanced rate measuring device according to the present invention, and FIG. 2 is a block diagram of a conventional device. 1.2... Rolling roll, 3... Rolling material, 6... Drive motor, 7... First pulse transmitter, 10... Looper roll, 11... Second pulse transmitter, 12 ... Tension meter, 13... Advanced rate calculation device, 14... First calculation means, 15... Second calculation means, 16... Counter. Applicant's agent Patent attorney Takehiko Suzue Figure 2

Claims (1)

[Claims] a first pulse transmitter that transmits a pulse signal in accordance with the rotation of a rolling roll; a second pulse transmitter that transmits a pulse signal in accordance with the rotation of a looper roll disposed between the rolling mills;
a tension meter provided on the looper roll to measure the tension of the rolled material between the stands;
The length of the rolled material between the stands is calculated by correcting the slip between the looper roll and the rolled material based on the count value of the pulse signal from the pulse transmitter and the tension value measured by the tension meter. a first calculating means; and a first calculating means for calculating an advance rate of rolling based on the counted value of the pulse signal from the first pulse generator during the predetermined period and the length of the rolled material determined by the first calculating means. 2. An advanced rate measuring device characterized by comprising: 2 calculation means.