KR20030035553A - Apparatus and the Method for Observing of X-Ray and γ-Ray - Google Patents

Abstract

PURPOSE: An apparatus for monitoring a thickness meter and a method thereof are provided to prevent generation of coils having bad thickness by a measurement error of the thickness meter. CONSTITUTION: A pulse generator of a mandrel detects data related to the mandrel rotation frequency, the height of a coil car, and a coil radius(S1-S3). A mandrel of a coil car transmits the data to a supervisory control computer. The supervisory control computer firstly detects a mean thickness of a coil through the received data(S4). The supervisory control computer sets up a final target thickness of the coil(S5). Data related to side trimming and actual measurement of the coil, and an actual weight of the coil, and data related to a length of the coil are transmitted to the supervisory control computer(S10-S50). The supervisory control computer secondly detects the mean thickness of the coil through the received data(S60). The supervisory control computer compares the firstly detected value with the secondly detected value for judging a measuring error.

Description

Apparatus and the Method for Observing of X-Ray and γ-Ray

The present invention relates to an apparatus and a method for monitoring a thickness gauge (X-ray, γ-ray) used in cold rolling and hot rolling lines, and more particularly, the role of the device around the tension reel ( Using the height of the coil car, the number of turns of the tension reel, the coil length by the platen, the basis weight of the weighing machine, the width meter of the side trimmer, etc. The present invention relates to a monitoring apparatus and a method of a thickness gauge that can be prevented in advance.

In general, companies that produce coils, paper, or plastic wrap products in coils form coils using X-rays or gamma rays, which are measured just before the product is wound up. Check that the product is being produced to the thickness.

At this time, if a thickness different from that of the target product is detected, the gap of the roll is reduced or increased by the deviation generated to match the target product thickness.

However, the initial setting value of the thickness gauge may be set incorrectly, or the initial zeroing value of the thickness gauge may not be correct, or the sensor may be deteriorated or the X-ray overvoltage may be changed while performing the rolling operation after the initial zeroing. Due to the change in the amount of projection, the thickness of the product cannot be read accurately.

However, the actual rolling mill does not detect any of the above errors when detecting the thickness, and there is a problem of working with the value read by the thickness gauge as it is.

In addition, when the driver knows that the thickness gauge incorrectly recognizes the thickness of the product in the field, when a complaint comes from a post-process or a demand price, there is a problem that many defective products are already produced at that time.

Therefore, in order to solve such a problem, there is a Korean Patent Application No. 2000-081066 (filed date: December 23, 2000, the name of the invention: a method for precisely controlling the thickness of the continuous cold rolling mill), but the problem of the present invention is that the tachometer operates normally. It can be used only when it is used. Also, the method uses the formula "Stand entering thickness x entering plate speed = stand exiting thickness x exiting plate speed". If the setting is set incorrectly, such an error cannot be detected.

In addition, the basic assumption of the rolling theory is that the width change does not occur (stand entry thickness x entry plate width x entry plate velocity = stand exit thickness x exit plate width x exit plate velocity), but in fact, the width change due to tension occurs. There was a problem that it has its own error.

The present invention has been made to improve the above-described problems, coil car height (coil car), the number of winding of the tension reel, the coil length by the tachometer, the basis weight of the weighing machine and the side trimmer (width trimmer) By using the role of the device around the tension reel, it is possible to monitor the current thickness gauge physically and systemically to prevent product defects caused by the measurement error of the thickness gauge in advance. It is an object of the present invention to provide a monitoring apparatus and method thereof.

1 is a block diagram showing a monitoring apparatus for a thickness gauge of the present invention.

Figure 2a is a schematic diagram showing the standby state of the coil car used in the monitoring device and method of the thickness gauge of the present invention

Fig. 2B is a schematic diagram showing the state of movement of the coil car used in the monitoring apparatus and the method of the thickness gauge of the present invention.

Fig. 2C is a schematic diagram showing a weighing instrument used in the monitoring apparatus and the method of the thickness gauge of the present invention.

Figure 3 is a flow chart showing a monitoring method of the thickness gauge of the present invention

4 is a flowchart showing a coil average thickness calculation method using a coil car and a mandrel rotation speed in the monitoring method of the thickness gauge of the present invention.

5 is a flowchart showing a coil average thickness calculation method using the coil outer diameter actual value and the mandrel rotation speed in the monitoring method of the thickness gauge of the present invention.

6 is a flowchart showing a coil average thickness calculation method using a weighing machine in the monitoring method of the thickness gauge of the present invention.

7 is a flowchart illustrating a coil average thickness calculation method using a basis weight measurement value of a weighing machine, a measurement length of a plate meter, and a measurement width of a side trimmer in the monitoring method of the thickness gauge of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: mandrel 2: coil

3: coil car 10: mandrel PLG (Pulse Generator)

20: coil car PLG30: SCC

40: PLC50: Weighing machine

60: speedometer 70: alarm

As a means for achieving the above object, the monitoring apparatus of the thickness gauge of the present invention is installed in the mandrel PLG (Pulse Generator), a coil measuring instrument that is installed at the rear of the mandrel to measure the rotational speed of the rotating body, the lower part of the coil car Coil car PLG which detects the height of the coil car and calculates the radius of the coil, and the PLC which performs the deviation control by checking the coil's side trimming, the actual width and the insertion of the sleeve in real time as the lowest control stage. Programmable Logic Controller), SCC (Supervisory Control Computer) which is responsible for managing data by receiving actual value from PLC while sending various indications to PLC, and weighing weight of coil. It is characterized by consisting of an alarm to alarm through a plate and a buzzer to measure the plate speed of the coil.

In addition, the monitoring method of the thickness gauge of the present invention includes the steps of temporarily storing the mandrel rotation speed data detected by the mandrel PLG in the PLC after being transferred to the PLC;

Storing the moving height data of the coil car detected by the coil car PLG and then temporarily storing the data in the PLC;

Temporarily storing the thickness data of the coil calculated by the PLC in the PLC;

Coil average thickness is calculated in PLC or SCC using mandrel rotation speed data, coil car movement height data and coil thickness data temporarily stored in PLC, and height data from the fixed position of coil car to the center of mandrel. Steps;

Setting the final target thickness value of the coil required by the consumer in the SCC in the X-ray when the average coil thickness is calculated;

Performing deviation control on the basis of the X-ray setting value in the PLC;

Comparing the average thickness value of the coil with the X-ray setting value by the SCC and determining whether the comparison value exceeds ± 0.7% of the X-ray setting value;

If the value exceeds ± 0.7%, the driver may pay attention by lighting the number of the corresponding coil through the monitor of the SCC watched by the driver until the coil reaches the weighing machine;

Storing side trimming data of coils, actual width data of coils, and data on whether a sleeve is inserted into a coil being coiled by the PLC, and then temporarily storing the data in the SCC;

Storing, by the SCC, data received from the PLC for the actual weight of the coil after the data is received and temporarily received;

The SCC temporarily storing the received data after receiving the coil length data from the tachometer;

Calculating a coil average thickness in the SCC using data of side trimming of the coil, measurement width of the coil, data of whether the sleeve is inserted into the coil being wound, data of the actual weight of the coil, and data of the length of the coil Wow;

Comparing, by the SCC, the average thickness value of the coil with the X-ray setting value;

Determining whether the comparison value exceeds ± 1.0% of the calculated x-ray setting value;

When the judgment exceeds ± 1.0%, turning on the monitor of the SCC watched by the drivers to the bending machine to allow the driver to pay attention;

If the coil average thickness calculation does not exceed ± 0.7% of the X-ray setting and the coil average thickness calculation does not exceed ± 1.0% of the X-ray setting, it is determined that the X-ray is measuring normally. Making a step;

If the coil average thickness calculation value does not exceed ± 0.7% of the X-ray setting value and the coil average thickness calculation value exceeds ± 1.0% of the X-ray setting value, the SCC monitor determines that there may be an error in the weighing machine or the tachometer. Illuminating the lamp to cause the driver's attention and warning through the buzzer;

Performing a measurement with a micrometer on the coil;

Determining whether the measured value is greater than ± 1.0%;

Stopping the line when the determination exceeds ± 1.0% and then performing zeroing on the thickness gauge;

If the measured value does not exceed ± 1.0%, determining that the weighing machine and the tachometer are abnormal and checking the same;

If it exceeds ± 0.7% and at the same time exceeds ± 1.0%, the physical calculations at this time determine that the thickness gauge is erroneously measured, and the SCC warns through the alarm buzzer to let the driver Measuring with a micrometer;

It is characterized by consisting of the steps to monitor the thickness gauge, weighing machine and plate meter by determining whether the measured value exceeds ± 1.0%.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing an apparatus for implementing the monitoring method of the thickness gauge of the present invention, as shown in the drawing is a device of the present invention is installed in the rear of the mandrel measuring instrument for measuring the rotational speed of the rotating body Reel PLG (Pulse Generator) 10, the coil car PLG (20) which is installed under the coil car (Coil Car) detects the height of the coil car and calculates the radius of the coil, the coil in real time as the lowest control stage Programmable Logic Controller (PLC) 40 which checks the presence or absence of side trimming, measurement width and sleeve insertion, and performs deviation control, and transmits various indication values to the PLC by using the calculator one level above the PLC 40. At the same time, the supervisory control computer (SCC) 30, which is responsible for managing data by receiving measured values from the PLC and managing the coils of the process line, the weighing machine 50 for detecting the actual weight of the coils, It consists of a tachometer 60 to measure the plate speed of the coil and the alarm 70 to alarm through the buzzer.

The operation of the apparatus of the present invention having the above configuration will be described below.

First, the data on the number of mandrel rotations detected by the PLG 10 of the mandrel, which is the main equipment for winding the coil, and the detected coils by the PLG 20 of the coil car that moves the coil to the uncoiler. The data about the height and the coil radius of the coil car is transmitted to the SCC (30). Accordingly, the SCC 30 primarily detects the average thickness of the coil through the received data.

Subsequently, data on the presence or absence of side trimming and measurement width of the coil detected by the PLC 40 and whether the sleeve is inserted, data on the actual weight of the coil detected by the weighing machine 50, and the tachometer 60 The data on the length of the coil detected by the SCC 30 is transmitted to each. Accordingly, the SCC 30 secondly detects the average thickness of the coil through the received data.

When the above process is completed, the SCC 30 compares the primary detection value with the secondary detection value and if the measurement abnormality of the thickness gauge (not shown) is determined to warn the driver through the buzzer of the alarm 70. do.

Hereinafter, the monitoring method of the thickness gauge of the present invention by the above-described apparatus of the present invention will be described with reference to the flowcharts of FIGS. 1 to 3.

The monitoring method of the thickness gauge of the present invention includes a first detection method for calculating an average thickness of the coil using a mandrel (1), a coil (2), and a coil car (3), and monitoring the thickness gauge through the same. After calculating the average thickness of the coil by using the weighing machine 50, the second detection method is performed by monitoring the thickness gauge through the detection, and the detection value by the first detection method and the detection by the second detection method After comparing the values, if the measurement abnormality of the thickness gauge is determined, the warning is made to the driver through the buzzer of the alarm 70.

The monitoring method of the thickness measurement system of the present invention, which warns the driver through an alarm when a measurement abnormality of the thickness measurement system is determined through the comparison between the first detection method, the second detection method, and the method, will be described below. Same as

When the coil 2 is being wound up through the mandrel 1, which is a winding device, the coil car 3 is in a standby state of zero height as shown in Fig. 2A, and the coil 2 being wound is then After cutting, the mandrel PLG 10 detects the number of revolutions of the mandrel, and then transmits data on the number of revolutions of the mandrel to the PLC 40, and the data on the number of revolutions of the transmitted mandrel is Temporarily stored in the PLC 40 (S1).

Next, as shown in FIG. 2B, the coil car 3 rises to come into contact with the coil 2. When the cylinder pressure of the coil car 3 reaches about 40 kg / cm 2 during the contact, the coil The car is recognized as being in contact with the coil, and the height h at which the coil car is moved is detected by the coil car PLG 20 installed under the coil car, and the coil car PLG 20 detects the height h. The moving height h of the coil car is transmitted to the PLC 40 and then temporarily stored in the memory on the PLC 40 (S2).

In addition, at the moment when the coil car 3 contacts the coil 2, the PLC 40 calculates the thickness R of the coil and temporarily stores it in the memory (S3).

In the above, the height H from the standby position of the coil car 3 to the center of the mandrel 1 has a fixed position value (3205.9 mm) by design, and the The upper end is designed at an angle such that the coil does not fall in consideration of the maximum diameter of the coil 2, and the angle between the distance a and the distance b (shown in FIG. 2B) is typically 9.75 °.

The above results, that is, data about the number of revolutions of the mandrel temporarily stored in the memory of the PLC 40, data about the moving height h of the coil car, data about the thickness R of the coil, and a fixed value The average thickness of the coil 2 can be obtained by using the data on the height H from the standby position of the in-coil car 3 to the center of the mandrel 1, which is as follows. .

(Formula 1)

Coil Average Thickness = Coil Thickness (R) / Mandrel Speed

The general formula (1) may be calculated by the PLC 40 itself, or may be calculated by the SCC 30 when each data is transmitted to the SCC 30, which is “{(3205.9-coil car moving height). (h)) x (COS9.75-mandrel radius (305 mm) + alpha) x beta} / {coil winding number + γ)} = coil average thickness "is calculated based on the formula (S4).

Α, β, and γ in the above formulas represent correction coefficients, respectively.

When the average thickness (R) of the coil is calculated by the general formula (1), the SCC 30 sets the final target thickness value of the coil required by the consumer in an X-ray (not shown) (S5). The PLC 40 performs deviation control based on the X-ray setting value (S6).

Subsequently, after the SCC 30 compares the average thickness value of the coil and the X-ray setting value calculated according to the above process, it is determined whether the comparison value exceeds ± 0.7% of the X-ray setting value (S7). .

When the determination exceeds ± 0.7%, the coil 2 is monitored through a monitor (not shown) of the SCC 30 watched by drivers until the coil 2 reaches the weighing machine 50. By lighting the number of) so that the driver can pay attention (S8).

The reason for limiting the above value to ± 0.7% is that a measurement error of about 3 mm occurs as a result of measuring the outer diameter of the coil 2, and in the case of the mandrel 1 rotation, the measurement of about 2 to 3 wheels This is because an error occurs, and the degree on the average thickness of the coil may generate an error of about ± 0.7% of the setting value.

Next, the secondary detection method which calculates the average thickness of the coil 2 using the basis weight 50 shown in FIG. 2C among the monitoring methods of the thickness gauge of this invention is as follows.

First, in the PLC 40, data on the presence or absence of side trimming of the coil 2 used in calculating the average thickness of the coil 2 using basis weight measurement, data on the actual measurement width of the coil, and the coil 2 being wound. ) Is transmitted to the SCC 30, respectively, and the SCC 30 temporarily stores the data (S10, S20, S30).

In addition, the SCC 30 temporarily stores the data received after receiving and receiving data on the actual weight of the coil from the PLC 40 at the time when the coil 2 passes the weighing machine 50. (S40).

In addition, the SCC 30 temporarily stores the received data after receiving the data measured until the cutting of the length of the coil 2 in operation by the tachometer 60 (S50).

The above results, that is, data about the presence or absence of side trimming of the coil 2, data about the actual width of the coil, data about whether the sleeve is inserted into the coil 2 being wound, data about the net weight of the coil and the The average thickness of the coil 2 in the SCC 30 can be obtained by using data on the length of the coil, which is as follows.

(Formula 2)

Coil Average Thickness = Basis Weight Actual Value / (Coil Width × Coil Length × 7.87)

The formula (2) is calculated in the SCC 30 based on the formula "{coil weight / (coil width x coil length x specific gravity of iron (7.87))} x alpha = coil average thickness (S60). .

Α represents a correction factor in the above formula.

Subsequently, the SCC 30 compares the average thickness value of the coil and the X-ray setting value (the X-ray setting value and the measured value when working on the line can be calculated) calculated according to the above process (S70). It is determined whether a value exceeds ± 1.0% of the calculated X-ray setting value (S80).

When the determination exceeds ± 1.0%, the driver turns on the monitor through the monitor (not shown) of the SCC 30 that the drivers watch to the bending machine (S90).

This allows the operator to monitor in advance whether the thickness meter is working properly.

The reason why the value is limited to ± 1.0% is that the weighing machine error is about ± 0.2%, the coil width is about ± 0.2%, and the length information by the tachometer can cause the measurement error about ± 0.6%. This is because the degree of influence on the average thickness of the coil may cause an error of about ± 1.0% of the set value.

Finally, the monitoring method of the thickness measurement system of the present invention by the above-described primary detection method and secondary detection method will be described.

The average thickness calculation value of the coil 2 by the primary detection method does not exceed ± 0.7% of the X-ray setting value (A), and the average thickness calculation value of the coil 2 by the secondary detection method is X-rays. If it does not exceed ± 1.0% of the setting value (B) indicates that the X-ray is measuring normally, the situation ends (S100).

However, in the primary detection method, when it is normal (A), but in the secondary detection method when it exceeds ± 1.0% (C), there may be an error in the weighing machine 50 or the tachometer 60, so the SCC 30 monitor At the same time, the driver's attention is triggered by the buzzer (S90 and S200), and the inspection coil 2 is actually measured by a micrometer (not shown) (S210), and the measured value is ± 1.0. It is determined whether the percentage exceeds (S220).

If the determination exceeds ± 1.0%, the line is stopped and zeroing is performed on the thickness gauge (S230). If the measured value does not exceed ± 1.0%, the weighing machine and the tachometer have abnormalities. To check (S240).

If the primary detection method exceeds ± 0.7% and the secondary detection method exceeds ± 1.0% (D, E), the physical calculations at this time determine that the thickness gauge is measuring incorrectly. , SCC (30) warns through the buzzer of the alarm 70 to allow the driver to measure the thickness of the coil with a micrometer (1/1000) (S200, S210), the thickness gauge and weighing machine and plate meter By monitoring the power supply in advance to prevent the generation of a large number of bad thickness coils (S220, S230, S240).

4 is a flowchart showing a coil average thickness calculation method using a coil car and a mandrel rotation speed in the monitoring method of the thickness gauge of the present invention, and FIG. 5 is a coil outer diameter measurement in the monitoring method of the thickness meter of the present invention. 6 is a flowchart showing a coil average thickness calculation method using a value and a mandrel rotation speed, FIG. 6 is a flowchart showing a coil average thickness calculation method using a basis weight in the monitoring method of the thickness measurement system of the present invention, and FIG. 7 is a thickness measurement system of the present invention. Is a flowchart showing a coil average thickness calculation method using a basis weight measurement value of a weighing machine, a measurement length of a platemeter, and a measurement width of a side trimmer.

As described above, according to the monitoring apparatus and method of the thickness gauge of the present invention, a large amount of thickness defective coil is generated due to the measurement error of the thickness gauge as the thickness gauge currently in use monitors the thickness of the coil properly. Can be prevented in advance, thereby avoiding the loss of enormous costs.

Claims (2)

Mandrel PLG (Pulse Generator) (10), which is installed at the rear of the mandrel and measures the rotational speed of the rotating body, is installed at the bottom of the coil car to detect the height of the coil car and at the same time the radius of the coil Coil car PLG (20) that calculates the PFC (Programmable Logic Controller) (40) to check the side trimming and the actual width and the sleeve (Sleeve) insertion of the coil in real time as the lowest control stage to perform the deviation control, the The SCC (Supervisory Control Computer) 30, which is responsible for managing the data and the process of coil processing of the process line, while transmitting various indication values to the PLC 40 and receiving the measured values from the PLC, detects the actual weight of the coil. Weighing device 50, a measuring device of the thickness measuring system, characterized in that consisting of a tachometer 60 to measure the plate speed of the coil and the alarm 70 to alarm through the buzzer It is made by the monitoring apparatus of said thickness measuring system of Claim 1, Steps (S1, S2, S3) in which mandrel (1) rotational speed data, moving height (h) data of coil car (3), and coil (2) thickness (R) data are stored temporarily in the PLC (40), respectively. Wow; Calculating a coil average thickness in the PLC (40) or the SCC (30) using the data (S4); Setting a final target thickness value of the coil required by the consumer in the SCC (30) in an X-ray (S5); Performing deviation control in the PLC 40 based on the X-ray setting value (S6); When the SCC 30 compares the average thickness value of the coil with the X-ray setting value and determines whether the comparison value exceeds ± 0.7% of the X-ray setting value, and when the determination exceeds ± 0.7%, Lighting the number of the corresponding coil through a monitor (not shown) of the SCC 30 (S7, S8); Storing side trimming data, coil width data, coil insertion data, coil weight, and coil length data in the SCC 30 (S10, S20, S30, and S40). , S50); Calculating a coil average thickness in the SCC (30) using the data (S60); The SCC 30 compares the calculated average thickness value of the coil and the X-ray setting value, and determines whether the comparison value exceeds ± 1.0% of the X-ray setting value, and ± 1.0% of the judgment. If it exceeds the step (S70, S80, S90) to turn on the bending machine (Banding Machine) through a monitor (not shown) of the SCC (30); The average thickness calculation value of the coil 2 in the step S7 does not exceed ± 0.7% of the X-ray setting value (A), and the average thickness calculation value of the coil 2 in the step S80 is an X-ray. (B) determining that the X-rays are normally measured when not exceeding ± 1.0% of the set value (S100); In the step (S7), the average thickness calculation value of the coil (2) does not exceed ± 0.7% of the X-ray setting value (A), and the average thickness calculation value of the coil (2) in the step (S80) is an X-ray setting. When exceeding ± 1.0% of the value (C) determines that there may be an abnormality in the weighing machine 50 or the tachometer 60, and lighting on the SCC (30) monitor and warning through a buzzer (S90) S200); Performing a measurement with a micrometer with respect to the test coil (S210); Determining whether the measured value is greater than ± 1.0% (S220); Performing zeroing on the thickness gauge after stopping the line when the determination exceeds ± 1.0% (S230); If it is determined that the measured value does not exceed ± 1.0%, determining that there is an error in the weighing machine and the tachometer, and checking them (S240); If it exceeds the ± 0.7% (D) and at the same time exceeds the ± 1.0% (E), the physical calculations at this time determines that the thickness gauge is incorrectly measured, so that the SCC 30 alarms 70 Warning through a buzzer) to allow the driver to measure the thickness of the coil with a micrometer (S200, S210); Monitoring the thickness gauge, the weighing machine, and the plate meter by determining whether the measured value is greater than ± 1.0% (S220, S230, S240).