A control method for automatic setting of force and energy parameters of a thick plate rolling mill

Abstract

The present invention relates to a control method for automatically setting the force and energy parameters of a thick plate rolling mill, and belongs to the field of rolling mill control technology. S1. Setting the correspondence between the attribute characteristics of the rolled steel plate and the force and energy parameter KP value; S2. When rolling different steel grades or steel plates of different specifications, the process control system matches the force and energy parameter KP value corresponding to the attribute characteristics of the rolled steel plate according to the correspondence; S3. The process control system sends the force and energy parameter KP value of the rolling mill to the main control PLC system of the rolling mill; S4. The main control PLC system of the rolling mill converts the force and energy parameter KP value into the main transmission system control word; S5. The main control PLC system of the rolling mill sends the main transmission control word to the main transmission system of the rolling mill through the DP communication protocol; S6. The main transmission system of the rolling mill completes the power setting of the main transmission system of the rolling mill according to the main transmission control word. This solution realizes the flexible steel rolling function by automatically setting the force and energy parameters of steel plates of different varieties and specifications, which is beneficial to saving electric energy and reducing the rolling impact of the main motor.

Description

Technical Field

[0001] The invention belongs to the technical field of rolling mill control and relates to a control method for automatically setting the force and energy parameters of a thick plate rolling mill. Background Art

[0002] The rolling mill is one of the important equipment on the thick plate rolling production line. It mainly drives the upper and lower main motors of the rolling mill through the main transmission control system of the rolling mill to realize the rolling of steel plates of different specifications.

[0003] During the steel plate rolling process, controlling mill power-related energy parameters is crucial due to the varying steel grades and specifications of the rolled plates. Existing heavy plate mills set mill power parameters at 100% regardless of the steel grade or specification being rolled. Once these values are established, they are never changed during production. This not only wastes electricity but also places significant impact loads on the mill's upper and lower main motors, severely impacting their service life. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a control method for automatically setting the power and energy parameters of a thick plate rolling mill. According to the steel type or rolling specification of the rolled steel plate, the power of the main transmission system of the rolling mill is automatically set, and the power and energy parameters for steel plates of different types and specifications are automatically set. The flexible steel rolling function is realized, and the status quo of the original power and energy parameters of the rolling mill remaining unchanged is changed, which is conducive to saving electricity and reducing the rolling impact of the main motor.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A control method for automatically setting the power parameters of a thick plate rolling mill comprises the following steps:

[0007] S1. Setting the corresponding relationship between the property characteristics of the rolled steel plate and the force energy parameter KP value;

[0008] S2. When rolling different steel grades or steel plates of different specifications, the process control system matches the force energy parameter KP value corresponding to the property characteristics of the rolled steel plate according to the corresponding relationship;

[0009] S3, the process control system sends the rolling mill force parameter KP value to the rolling mill master control PLC system;

[0010] S4, the rolling mill main control PLC system converts the force energy parameter KP value into the main transmission system control word;

[0011] S5, the rolling mill main control PLC system sends the main drive control word to the rolling mill main drive system through the DP communication protocol;

[0012] S6. The main transmission system of the rolling mill completes the power setting of the main transmission system of the rolling mill according to the main transmission control word.

[0013] Furthermore, when the rolled steel plate property characteristics are at default values, the force energy parameter KP value is 70%;

[0014] When the rolled steel grade includes L415 or A460, the force energy parameter KP value is 80%;

[0015] When the rolled steel grade includes D460 or E460, the force energy parameter KP value is 85%;

[0016] When the rolled steel grade includes A40 or D40, the force energy parameter KP value is 90%;

[0017] When the rolled steel grade includes E40, D47 or E47, the force energy parameter KP value is 95%;

[0018] When one of the four rolled steel plate property characteristics is met, namely, the rolled steel grade contains q and the rolled thickness is greater than or equal to 40 mm, the rolled steel grade contains E and the rolled thickness is greater than or equal to 50 mm, the rolled thickness is greater than or equal to 70 mm, and the rolled thickness is less than or equal to 12 mm and the rolled width is greater than or equal to 3000 mm, the force-energy parameter KP value is 100%.

[0019] Furthermore, the conversion formula between the force energy parameter KP value and the control word is:

[0020] Main drive control word = KP*C;

[0021] Among them, C is the main transmission control word corresponding to the main transmission power parameter being 100%, and is set according to the model of the rolling mill main transmission control system.

[0022] Furthermore, the rolling mill main drive control system adopts a SIMADYN-D control system, and the value of C is 16384.

[0023] Furthermore, in said S3, the rolling mill force parameter KP value is sent in the form of a message in the TCP / IP protocol.

[0024] The beneficial effects of the present invention are:

[0025] The present invention has the function of automatically setting the force and energy parameters of steel plates of different varieties and specifications, realizing the flexible steel rolling function, changing the current situation in which the force and energy parameters of the original rolling mill remain unchanged, which is beneficial to saving electricity and reducing the rolling impact load of the main motor, thereby reducing the loss of the service life of the main motor of the rolling mill and reducing maintenance costs.

[0026] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0028] Figure 1 The present invention is a flow chart of a control method for automatically setting the force and energy parameters of a thick plate rolling mill. DETAILED DESCRIPTION

[0029] The following describes the embodiments of the present invention by means of specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0030] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0031] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] See also Figure 1 , which is a control method for automatically setting the power and energy parameters of a thick plate rolling mill. The working process of the control method for automatically setting the power and energy parameters of a thick plate rolling mill is as follows:

[0033] 1. The rolling mill process control system obtains the rolling mill steel plate force parameter KP value according to the parameter characteristics of the rolled steel plate. For example, when the rolling mill main drive control system adopts the SIMADYN-D control system, the rolling mill force parameter setting table is as follows:

[0034]

[0035] 2. When the rolling mill is rolling general steel grades and specifications, the process control system sets the force and energy parameters to 70% by default; if other special steel grades or specifications of steel plates are rolled, the process control system obtains different setting values of the force and energy parameters of the rolling mill according to the force and energy parameter table of the rolling mill.

[0036] 3. The process control system sends the KP value of the rolling mill force and energy parameter setting to the rolling mill master PLC system in the form of telegrams via TCP / IP protocol.

[0037] 4. The main control PLC system of the rolling mill converts the force parameter KP value into the main transmission system control word through the force parameter and control word conversion formula. The force parameter and control word conversion formula is as follows:

[0038] Main drive control word = KP*16384, where the main drive control system of the rolling mill is the SIMADYN-D control system, and the main drive energy parameter corresponding to 16384 is 100%.

[0039] 5. The main control PLC system of the rolling mill sends the main drive control word to the main drive system of the rolling mill through the DP communication protocol.

[0040] 6. The SIMADYN-D control system of the rolling mill main drive automatically sets the power of the rolling mill main drive system according to the main drive control word, realizing the automatic setting function of the force and energy parameters for different types and specifications of steel plates.

[0041] The present invention provides a control method for realizing automatic setting of the force and energy parameters of a thick plate rolling mill. The rolling mill process control system can obtain different KP values of the force and energy parameters of the rolled steel plate according to the steel type or rolling specification of the rolled steel plate. The process control system sends the KP value of the force and energy parameter of the rolled steel plate to the main control PLC system of the rolling mill via TCP / IP telegram. The main control PLC system of the rolling mill calculates the main transmission control word according to the current KP value of the force and energy parameter of the rolled steel plate, and sends it to the main drive SIMADYN-D control system of the rolling mill via the DP communication protocol. After receiving the control word of the force and energy parameter of the rolled steel plate, the SIMADYN-D main drive control system of the rolling mill completes the automatic setting of the power of the main transmission system of the rolling mill, realizes the automatic setting function of the force and energy parameters for steel plates of different types and specifications, realizes the flexible steel rolling function, changes the current situation in which the force and energy parameters of the rolling mill remain unchanged, is conducive to saving electricity, and reduces the rolling impact of the main motor.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. A control method for automatically setting the power parameters of a plate rolling mill, characterized by: The following steps are involved: S1. Setting the corresponding relationship between the property characteristics of the rolled steel plate and the force energy parameter KP value; S2. When rolling different steel grades or steel plates of different specifications, the process control system matches the force energy parameter KP value corresponding to the property characteristics of the rolled steel plate according to the corresponding relationship; S3, the process control system sends the rolling mill force parameter KP value to the rolling mill master control PLC system; S4, the rolling mill main control PLC system converts the force energy parameter KP value into the main transmission system control word; S5, the rolling mill main control PLC system sends the main drive control word to the rolling mill main drive system through the DP communication protocol; S6. The main transmission system of the rolling mill completes the power setting of the main transmission system of the rolling mill according to the main transmission control word; When the rolled steel plate property characteristics are the default values, the force energy parameter KP value is 70%; When the rolled steel grade includes L415 or A460, the force energy parameter KP value is 80%; When the rolled steel grade includes D460 or E460, the force energy parameter KP value is 85%; When the rolled steel grade includes A40 or D40, the force energy parameter KP value is 90%; When the rolled steel grade contains E40, D47 or E47, the force energy parameter KP value is 95%; When one of the following rolling steel plate attribute characteristics is met: the rolling steel grade contains q and the rolling thickness is greater than or equal to 40 mm, the rolling steel grade contains E and the rolling thickness is greater than or equal to 50 mm, the rolling thickness is greater than or equal to 70 mm, the rolling thickness is less than or equal to 12 mm and the rolling width is greater than or equal to 3000 mm, the force energy parameter KP value is 100%; The conversion formula between the force energy parameter KP value and the control word is: Main drive control word = KP×C; Among them, C is the main transmission control word corresponding to the main transmission energy parameter of 100%, which is set according to the model of the rolling mill main transmission control system.

2. A control method for automatically setting the power parameters of a plate rolling mill according to claim 1, characterized in that: The rolling mill main drive control system adopts the SIMADYN-D control system, and the value of C is 16384.

3. The control method for automatically setting the power parameters of a plate rolling mill according to claim 1, characterized in that: In the above S3, the rolling mill force parameter KP value is sent in the form of a message in the TCP / IP protocol.

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