阅读说明：本技术 利用测宽仪对中厚板轧机侧导板自动标定的方法及其装置 (Method and device for automatically calibrating side guide plate of medium and heavy plate mill by using width gauge ) 是由 苗雨川 王全胜 汤风鸣 于 2020-04-21 设计创作，主要内容包括：本发明公开了一种利用测宽仪对中厚板轧机侧导板自动标定的方法及其装置,在轧钢生产周期初期,协调多个既有自动化控制模块,利用仪表测量宽度自动进行侧导板开口度标定的方法,主要技术要点为在自动化系统中增加生产周期识别、辊道输送、钢板宽度测量、侧导板对中的协调联动模块,该模块协调完成钢板自动测宽、对中,并计算侧导板与轮廓仪宽度偏差量,自适应调整侧导板标定值。本发明节省了侧导板开口度标定操作的时间、人力成本,减少安全风险,并且提高侧导板测量宽度的精度。(The invention discloses a method and a device for automatically calibrating a side guide plate of a medium and heavy plate rolling mill by using a width gauge. The invention saves the time and labor cost for calibrating the opening degree of the side guide plate, reduces the safety risk and improves the precision of the width measurement of the side guide plate.)

1. A method for automatically calibrating a side guide plate of a medium and heavy plate mill by using a width gauge is characterized by comprising the following steps:

a width measuring instrument WG for measuring the width of a steel plate is arranged beside a rolling mill or a side guide plate, the width measuring instrument WG is connected with a coordination linkage module C1, the coordination linkage module C1 is connected with an execution module C2, the execution module C2 is used for driving the opening degree calibration of the side guide plate, and the coordination linkage module C1 is further connected with a roller way conveying module Cg and a side guide plate centering operation module Cc;

the method comprises the following processes:

the coordination linkage module C1 identifies a first steel plate in a production cycle, and instructs the roller way conveying module Cg to move the first steel plate below the width measuring instrument WG;

the width measurement data Wi is measured by the width measuring instrument WG;

the coordination linkage module C1 instructs the roller way conveying module Cg to move the first steel plate to the position of a side guide plate;

the coordination linkage module C1 instructs the side guide centering operation module Cc to perform automatic side guide centering operation to obtain a side guide opening degree display value Ki;

respectively introducing the side guide plate opening degree display value Ki and the width measurement data Wi into the coordination linkage module C1;

the coordination linkage module C1 calculates the deviation Pi between the width measurement data Wi and the opening degree display value Ki of the side guide plate as Wi-Ki;

and the deviation Pi is taken as a calibration reference quantity and is introduced into the execution module C2, and the execution module C2 automatically replaces the calibration reference value Pz of the side guide plate according to the deviation Pi to finish the automatic calibration process of the opening degree of the side guide plate.

2. The method for automatically calibrating the side guide plate of the medium and heavy plate mill by using the width gauge as claimed in claim 1, wherein: the substitution calculation of the side guide plate calibration reference value Pz is as follows:

Pz_new＝α×Pi+(1-α)×Pz_{Old age}

In the above formula, Pz_{Old age}Is a previously performed side guide calibration reference value, Pz_NewIs a side guide plate calibration reference value to be executed after calibration, and alpha is a coefficient.

3. The method for automatically calibrating the side guide plate of the medium and heavy plate mill by using the width gauge as claimed in claim 1, wherein the value range of α is between 0.1 and 0.8.

4. The utility model provides an utilize width gage centering thick plate mill side guide automatic calibration's device which characterized in that includes:

a width gauge WG arranged beside the rolling mill or the side guide plate, a coordination linkage module C1 connected with the width gauge WG, an execution module C2 connected with the coordination linkage module C1, a roller way conveying module Cg and a side guide plate centering operation module Cc,

the execution module C2 is used for driving the opening degree calibration of the side guide plate;

the coordination linkage module C1, the execution module C2, the width measuring instrument WG, the roller conveying module Cg and the side guide plate centering operation module Cc execute the following operation processes:

the coordination linkage module C1 identifies a first steel plate in a production cycle, and instructs the roller way conveying module Cg to move the first steel plate below the width measuring instrument WG;

the width measurement data Wi is measured by the width measuring instrument WG;

the coordination linkage module C1 instructs the roller way conveying module Cg to move the first steel plate to the position of a side guide plate;

the coordination linkage module C1 instructs the side guide centering operation module Cc to perform automatic side guide centering operation to obtain a side guide opening degree display value Ki;

respectively introducing the side guide plate opening degree display value Ki and the width measurement data Wi into the coordination linkage module C1;

the coordination linkage module C1 calculates the deviation Pi between the width measurement data Wi and the opening degree display value Ki of the side guide plate as Wi-Ki;

and the deviation Pi is taken as a calibration reference quantity and is introduced into the execution module C2, and the execution module C2 automatically replaces the calibration reference value Pz of the side guide plate according to the deviation Pi to finish the automatic calibration process of the opening degree of the side guide plate.

5. The device for automatically calibrating the side guide plate of the medium and heavy plate mill by using the width gauge as claimed in claim 4, wherein: the substitution calculation of the side guide plate calibration reference value Pz is as follows:

Pz_new＝α×Pi+(1-α)×Pz_{Old age}

In the above formula, Pz_{Old age}Is a previously performed side guide calibration reference value, Pz_NewIs a side guide plate calibration reference value to be executed after calibration, and alpha is a coefficient.

6. The method for automatically calibrating the side guide plate of the medium and heavy plate mill by using the width gauge as claimed in claim 4, wherein the value range of α is between 0.1 and 0.8.

Technical Field

The invention relates to an automatic control technology of a medium plate rolling production line, in particular to a method and a device for automatically calibrating a side guide plate of a medium plate rolling mill by using a width gauge, and particularly relates to a control method for automatically calibrating the opening degree of the side guide plate of the rolling mill by using the width gauge after roll change of the medium plate production line with the width gauge arranged at a position far away from a rack.

Background

The existing modern medium and heavy plate rolling production line is equipped with a Width Gauge (WG), in order to ensure that the measuring environment of the width gauge is less affected by water mist and iron oxide rust dust and is not too severe, the width gauge is sometimes installed on a production line position far away from a rolling mill, and when the steel plate is rolled, the width of an intermediate plate is measured (arranged between a roughing mill and a finishing mill and far away from both), or the width of a finished product is measured (arranged at a far position behind the finishing mill), and the width is used for monitoring and checking the quality of the produced product.

The side guide plates, also called the push beds, arranged in front of and behind the frame of a modern heavy and medium plate rolling mill are guide devices for guiding a steel plate into the rolling mill, and basically function to guide the steel plate into the rolling mill in a centering manner (aligned with the center line of the rolling mill) through clamping and guiding. However, in the production practice of each medium plate factory, because the opening degree of the side guide plate in the centering and clamping operation can roughly represent the width of the steel plate, the side guide plate develops various additional functions, such as guiding the opening degree of the side guide plate in the subsequent pass (CN103962387A, a dynamic control method for steel rolling side guide plate position following), and for example, using the opening degree of the side guide plate as an actually measured width check model to calculate the width and correct the setting of the vertical roll gap (CN102825072A, a method for correcting the setting of the vertical roll gap for the centering width measurement of the side guide plate), and using the opening degree of the side guide plate as one of the input values of the rolling mill width control model, comparing the input values with the data of the width measuring instrument in front of the width measuring machine, the reference value of the plate blank in the upstream process, and the like to deduce the value of the plate width finally received by the width control model (CN105642676A, a method for performing width model control by using the value of the side guide plate gap.

The application effect of the additional functions of the side guide plates depends on the opening degree precision of the side guide plates, so that people pay attention to the calibration process and precision of the side guide plates. Specifically, the calibration accuracy of the side guide plate can be divided into two accuracy indexes concerned by the production process, wherein one is the opening accuracy, namely the deviation between an electric display value of the distance between the two guide plates and an actual value, and the other is the alignment accuracy, and represents the coincidence condition of the central line between the two guide plates and the central line of the rolling mill. For the additional function of the side guides related to width control, attention is paid to the side guide opening degree calibration process and the opening degree precision.

The existing method for calibrating the opening degree of the side guide plate is that during the production shutdown, an operator directly measures the distance between the two guide plates by using a tape measure as a reference opening degree, the measured value of the tape measure is manually recorded and manually input into an electrical program, the reference opening degree is compared with the position detection value of the hydraulic cylinder of the side guide plate by the electrical program, the calibration deviation is stored, and after the calibration, the measured value of the opening degree of the side guide plate of the electrical program is actually the sum of the position detection value and the calibration deviation.

At present, the technical scheme about the calibration of the opening degree of the side guide plate is not related a lot and mainly has several common characteristics:

1) the method is implemented after production shutdown and cannot be implemented in the production process;

2) the distance between the two guide plates is measured by using a well-designed special device to replace a tape measure, and some devices can also replace a pen and paper to directly transmit information;

3) the calibration process needs manual operation or semi-automatic operation, and the semi-automatic operation means that the calibration process needs to be started manually, and the subsequent calibration process is automatically completed by an electric system.

For the calibration method of the opening degree of the side guide plate of the heavy and medium plate mill, the problems of the conventional tape measure calibration method are as follows:

1) like the CN202485591U background art, the contact friction between the lining plate of the side guide plate and the high temperature steel plate will cause gradual wear, and laser overlay welding is performed to repair the worn defect, which often causes the bottom of the lining plate to deform, and the confirmation of the measurement datum plane is not easy. In short, the opening degree precision of the side guide plate is influenced by the abrasion and repair of the lining plate, the abrasion of the lining plate happens occasionally in the whole production period, and the abrasion condition is changed in the production period;

2) as mentioned in the background of CN206898071U, if the hydraulic cylinder apparatus of the side guide plate is in a poor state during rolling, slow internal leakage may occur, and the driving transmission chain is worn, which all affect the accuracy of the opening degree of the side guide plate, so that the measured width of the side guide plate is small.

For the two problems, CN206898071U provides a solution, that is, during calibration, the compensation is performed in consideration of the cylinder internal leakage condition from the last shutdown calibration to the present. However, the conventional calibration cycle of the side guides is in units of weeks, that is, if an internal leak occurs, it takes several weeks before it can be realized during calibration.

In summary, the disadvantages of the prior art are mainly reflected in:

1) the opening degree of the side guide plate is calibrated when the machine is stopped, so that the production time is reduced, and the effective operation rate of a rolling line is reduced;

2) besides the tape measure method, a special measuring device is often additionally arranged, so that the cost investment and the equipment maintenance amount are increased;

3) the operation is carried out on site beside the machine, and the safety risk of operators is high;

4) the calibration interval period is long, and the device state problems of lining plate abrasion, oil cylinder internal leakage, transmission chain abrasion and the like which influence the opening degree precision can not be adapted in time, so that the width precision of the finally output side guide plate is influenced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a method and a device for automatically calibrating the side guide plate of a medium and heavy plate mill by using a width gauge, wherein the width is measured by using the width gauge, and the opening degree of the side guide plate is automatically calibrated at the initial stage of a production period by spending a small amount of roller way transportation and width measurement time.

In order to achieve the purpose, the invention adopts the following technical scheme:

on the one hand, the method for automatically calibrating the side guide plate of the medium and heavy plate mill by using the width gauge comprises the following steps:

a width measuring instrument WG for measuring the width of a steel plate is arranged beside a rolling mill or a side guide plate, the width measuring instrument WG is connected with a coordination linkage module C1, the coordination linkage module C1 is connected with an execution module C2, the execution module C2 is used for driving the opening degree calibration of the side guide plate, and the coordination linkage module C1 is further connected with a roller way conveying module Cg and a side guide plate centering operation module Cc;

the method comprises the following processes:

the coordination linkage module C1 identifies a first steel plate in a production cycle, and instructs the roller way conveying module Cg to move the first steel plate below the width measuring instrument WG;

the width measurement data Wi is measured by the width measuring instrument WG;

the coordination linkage module C1 instructs the roller way conveying module Cg to move the first steel plate to the position of a side guide plate;

the coordination linkage module C1 instructs the side guide plate centering operation module Cc to perform automatic side guide plate centering operation to obtain a side guide plate opening degree display value Ki;

respectively introducing the side guide plate opening degree display value Ki and the width measurement data Wi into the coordination linkage module C1;

the coordination linkage module C1 calculates the deviation Pi between the width measurement data Wi and the opening degree display value Ki of the side guide plate as Wi-Ki;

and the deviation Pi is taken as a calibration reference quantity and is introduced into the execution module C2, and the execution module C2 automatically replaces the calibration reference value Pz of the side guide plate according to the deviation Pi to finish the automatic calibration process of the opening degree of the side guide plate.

The substitution calculation of the side guide plate calibration reference value Pz is as follows:

Pz_new＝α×Pi+(1-α)×Pz_{Old age}

In the above formula, Pz_{Old age}Is a previously performed side guide calibration reference value, Pz_NewIs a side guide plate calibration reference value to be executed after calibration, and alpha is a coefficient.

The value range of alpha is between 0.1 and 0.8.

On the other hand, the device for automatically calibrating the side guide plate of the medium and heavy plate mill by using the width gauge comprises:

a width gauge WG arranged beside the rolling mill or the side guide plate, a coordination linkage module C1 connected with the width gauge WG, an execution module C2 connected with the coordination linkage module C1, a roller way conveying module Cg and a side guide plate centering operation module Cc,

the execution module C2 is used for driving the opening degree calibration of the side guide plate;

the coordination linkage module C1, the execution module C2, the width measuring instrument WG, the roller conveying module Cg and the side guide plate centering operation module Cc execute the following operation processes:

the coordination linkage module C1 identifies a first steel plate in a production cycle, and instructs the roller way conveying module Cg to move the first steel plate below the width measuring instrument WG;

the width measurement data Wi is measured by the width measuring instrument WG;

the coordination linkage module C1 instructs the roller way conveying module Cg to move the first steel plate to the position of a side guide plate;

the coordination linkage module C1 instructs the side guide centering operation module Cc to perform automatic side guide centering operation to obtain a side guide opening degree display value Ki;

respectively introducing the side guide plate opening degree display value Ki and the width measurement data Wi into the coordination linkage module C1;

the coordination linkage module C1 calculates the deviation Pi between the width measurement data Wi and the opening degree display value Ki of the side guide plate as Wi-Ki;

and the deviation Pi is taken as a calibration reference quantity and is introduced into the execution module C2, and the execution module C2 automatically replaces the calibration reference value Pz of the side guide plate according to the deviation Pi to finish the automatic calibration process of the opening degree of the side guide plate.

The substitution calculation of the side guide plate calibration reference value Pz is as follows:

Pz_new＝α×Pi+(1-α)×Pz_{Old age}

In the above formula, Pz_{Old age}Is a previously performed side guide calibration reference value, Pz_NewIs a side guide plate calibration reference value to be executed after calibration, and alpha is a coefficient.

The value range of alpha is between 0.1 and 0.8.

In the technical scheme, the method for automatically calibrating the side guide plate of the medium and heavy plate mill by using the width gauge further has the following beneficial effects:

1) the calibration time of the side guide plate is saved, so that the production downtime is shortened, the daily effective production operation time can be increased by about 3 minutes, and the daily output is increased by about 0.21 percent;

2) because the operation of operators on the site of the rolling mill is not needed, the production safety of the operators is essentially ensured;

3) and the width precision of the side guide plate is improved by utilizing the data of a high-precision width measuring instrument.

Drawings

FIG. 1 is a schematic diagram of a field layout of an embodiment of the method of the present invention;

FIG. 2 is a schematic flow diagram of an embodiment of the method of the present invention;

FIG. 3 is a timing diagram illustrating an embodiment of the method of the present invention.

Detailed Description

The technical scheme of the invention is further explained by combining the drawings and the embodiment.

Referring to fig. 1, in the method for automatically calibrating a side guide of a heavy and medium plate rolling mill by using a width gauge, a width gauge WG for measuring the width of a steel plate is installed at a position far away from the rolling mill or the side guide, the width gauge WG is connected with a coordination linkage module C1, the coordination linkage module C1 is connected with an execution module C2, the execution module C2 is used for driving the opening degree calibration of the side guide 100, and the coordination linkage module C1 is further connected with a roller way conveying module Cg and a side guide centering operation module Cc.

Referring to fig. 2 to 3, the method of the present invention specifically includes the following steps:

when the rolling mill starts rolling at the first steel plate in the production cycle after roll changing and before actual rolling is not started, the process control L2 computer recognizes that the first steel plate is the first steel plate after roll changing, and then informs the coordination linkage module C1 to start the automatic calibration function.

And the coordination linkage module C1 informs the rolling mill to open a roll gap, so that the first steel plate smoothly passes through without rolling, coordinates the roller way conveying module Cg, moves the first steel plate to the lower part of the width measuring instrument WG, and informs the width measuring instrument WG of starting measuring by the coordination linkage module C1 to obtain the measured width measurement data Wi.

Then, the coordination linkage module C1 coordinates the roller conveyor module Cg to convey the first steel plate to the position of the side guide 100.

Then, the coordination linkage module C1 coordinates the side guide centering operation module Cc to start the side guide automatic centering operation, and the automatic centering operation is completed to obtain the side guide opening degree display value Ki. The total time required by the moving and centering operations of the first steel plate is 1-2 minutes.

Then, the side guide opening degree display value Ki and the width measurement data Wi are respectively introduced into the coordination linkage module C1, and the coordination linkage module C1 calculates the deviation Pi between the width measurement data Wi and the side guide opening degree display value Ki as Wi-Ki.

Then, the deviation Pi is taken as a calibration reference, the coordination linkage module C1 introduces the deviation Pi into the execution module C2, and the execution module C2 automatically replaces the side guide calibration reference value Pz according to the deviation Pi, and the replacement calculation of the side guide calibration reference value Pz is as follows:

Pz_new＝α×Pi+(1-α)×Pz_{Old age}

In the above formula, Pz_{Old age}Is a previously performed side guide calibration reference value, Pz_NewThe side guide plate calibration reference value is to be executed after calibration, and the value range of alpha is between 0.1 and 0.8.

Finally, the execution module C2 executes the existing calibration data update procedure to automatically complete the subsequent procedure for calibrating the opening degree of the side guide plate, so that the subsequent display value of the opening degree of the side guide plate is based on the newly updated calibration reference value.

Referring to fig. 1, the present invention further provides an apparatus for automatically calibrating a side guide plate of a medium and heavy plate mill by using a width gauge, comprising:

a width measuring instrument WG for measuring the width of the steel plate, a coordination linkage module C1 connected with the width measuring instrument WG, an execution module C2 connected with a coordination linkage module C1, a roller way conveying module Cg and a side guide centering operation module Cc are arranged at a position far away from the rolling mill or the side guide 100;

the execution module C2 is used for driving the opening degree calibration of the side guide plate 100;

the coordination linkage module C1, the execution module C2, the width measuring instrument WG, the roller conveying module Cg and the side guide plate centering operation module Cc execute the following operation processes:

the coordinated linkage module C1 identifies a first steel plate in a production cycle, and instructs the roller way conveying module Cg to move the first steel plate to the position below the width measuring instrument WG;

measuring width measurement data Wi by a width measuring instrument WG;

the coordination linkage module C1 instructs the roller way conveying module Cg to move the first steel plate to the position of the side guide plate 100;

the coordination linkage module C1 instructs a side guide centering operation module Cc to perform automatic centering operation on the side guide 100 to obtain a side guide opening degree display value Ki;

respectively introducing a side guide plate opening degree display value Ki and width measurement data Wi into a coordination linkage module C1;

the coordination linkage module C1 calculates the deviation Pi between the width measurement data Wi and the display value Ki of the opening degree of the side guide plate as Wi-Ki;

and the deviation Pi is taken as a calibration reference quantity and is introduced into an execution module C2, and the execution module C2 automatically replaces the calibration reference value Pz of the side guide plate according to the deviation Pi to finish the automatic calibration process of the opening degree of the side guide plate.

The substitution calculation of the side guide plate calibration reference value Pz is as follows:

Pz_new＝α×Pi+(1-α)×Pz_{Old age}

In the above formula, Pz_{Old age}Is a previously performed side guide calibration reference value, Pz_NewThe side guide plate calibration reference value is to be executed after calibration, and the value range of alpha is between 0.1 and 0.8.

Examples

And (3) installing a width gauge WG between the roughing mill and the finishing mill on the medium plate production line.

After the roll change, after the first steel plate of the production cycle starts to be rolled, the process control L2 computer recognizes that the first steel plate is the first steel plate after the roll change, and then informs the coordination linkage module C1 to start the automatic calibration function.

And the coordination linkage module C1 informs the rolling mill to open the roll gap, so that the steel plate can pass through smoothly without rolling, and controls the rolling mill roller way to rotate through the roller way conveying module Cg until the steel plate moves below the width gauge WG.

And the coordination linkage module C1 informs the width gauge WG to start measuring, and the obtained measuring result Wi is 2353 mm.

Then, the coordination linkage module C1 controls the roller way to convey the steel plate to the position of the side guide 100 through the roller way conveying module Cg.

Then, the coordinate linkage module C1 notifies the side guide centering control module Cc to start the automatic centering operation, and after the automatic centering is completed, the side guide aperture display value Ki is obtained as 2343 mm. The total time required for the moving and centering operations is about 1-2 minutes.

Then, the coordination linkage module C1 calculates the deviation Pi between the width measurement value Wi and the opening degree display value Ki, 2353 and 2343, 10 mm.

Then, Pi is used as a calibration reference and sent to the execution module C2 by the coordination linkage module C1, and a new side guide calibration reference value Pz is obtained according to the following formula:

Pz_new＝α×Pi+(1-α)×Pz_{Old age}

Pz_{Old age}When the value of (a) is 6mm and α is 0.5, then:

Pz_new＝10×0.5+(1-0.5)×6＝8mm。

Finally, the execution module C2 executes the existing calibration data updating program to replace the original 6mm with 8mm, and automatically completes the subsequent side guide opening degree calibration process, so that the subsequent side guide opening degree display value Ki is 8mm based on the newly updated calibration reference value.

In conclusion, the method has wide application range and convenient use, fully utilizes the existing equipment, does not need to increase investment, and is suitable for a heavy and medium plate mill production line provided with a width measuring instrument above a side guide plate roller way with automatic control

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.