CN116078829A - Automatic starting control system for solving problem of aluminum cold rolling mill starting patterns and application method - Google Patents

Automatic starting control system for solving problem of aluminum cold rolling mill starting patterns and application method Download PDF

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Publication number
CN116078829A
CN116078829A CN202310217217.7A CN202310217217A CN116078829A CN 116078829 A CN116078829 A CN 116078829A CN 202310217217 A CN202310217217 A CN 202310217217A CN 116078829 A CN116078829 A CN 116078829A
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CN
China
Prior art keywords
roller
pressure sensor
rolling mill
lower roller
cold rolling
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Pending
Application number
CN202310217217.7A
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Chinese (zh)
Inventor
黄基彬
周国彬
林欣
欧祈武
操郁贤
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Chinalco Ruimin Co Ltd
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Chinalco Ruimin Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chinalco Ruimin Co Ltd filed Critical Chinalco Ruimin Co Ltd
Priority to CN202310217217.7A priority Critical patent/CN116078829A/en
Publication of CN116078829A publication Critical patent/CN116078829A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/58—Roll-force control; Roll-gap control
    • B21B37/62—Roll-force control; Roll-gap control by control of a hydraulic adjusting device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/12—Toothed-wheel gearings specially adapted for metal-rolling mills; Housings or mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/14—Couplings, driving spindles, or spindle carriers specially adapted for, or specially arranged in, metal-rolling mills
    • B21B35/142—Yielding spindle couplings; Universal joints for spindles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B2001/221—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by cold-rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/021—Twin mills

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

The invention provides an automatic lifting control system for solving the problem of lifting patterns of an aluminum cold rolling mill and an application method thereof, wherein the automatic lifting control system comprises an uncoiler, a deflection roller, a plate-shaped roller, a coiling machine, an outlet grating, an inlet grating, an upper roller and a lower roller; a hydraulic cylinder for driving the lower roller to move along the vertical direction is arranged below the lower roller; the hydraulic system drives the hydraulic cylinder to move and comprises a first pressure sensor and a second pressure sensor; the first pressure sensor is arranged on the operation side of the hydraulic system, and the second pressure sensor is arranged on the transmission side of the hydraulic system; by using the technical scheme, the production of the lifting patterns can be avoided, the steps are prefabricated and solidified in the program, an operator only needs to press the automatic lifting button, the aluminum cold rolling mill can automatically lift the car for production according to the prefabricated steps, and the quality problem caused by improper manual operation is avoided.

Description

Automatic starting control system for solving problem of aluminum cold rolling mill starting patterns and application method
Technical Field
The invention relates to the technical field of aluminum cold rolling mills, in particular to an automatic starting control system for solving the problem of starting patterns of an aluminum cold rolling mill and an application method.
Background
When aluminum cold rolling mill is in rolling, when the strip is in contact with the roller, if the roller is in a static state, the contact roller mark is easy to be generated on the roller at the moment when the strip is in contact with the roller, the roller mark can be periodically printed on the surface of the strip in the rolling process to generate a rolling mark, the product with high surface quality required for rolling cannot meet delivery requirements, so the requirement on a rolling control method is very high, the operation level of operators is very high, but because part of operators are not experienced enough, the operation level of each operator is different, the product is unqualified due to the fact that the rolling mark defect is generated from time to time, the quality stability of the product is influenced, the roller with the rolling mark cannot be used for regrinding, the strip cannot meet the delivery requirements, and the cost is increased and the production efficiency is reduced.
Disclosure of Invention
Therefore, the invention aims to provide an automatic lifting control system for solving the problem of lifting patterns of an aluminum cold rolling mill and an application method thereof, which avoid the generation of the lifting patterns, prefabricate and solidify each step in a program, and an operator only needs to press an automatic lifting button to automatically lift the aluminum cold rolling mill for production according to the prefabricating steps, thereby avoiding the quality problem caused by improper manual operation.
In order to achieve the above purpose, the invention adopts the following technical scheme: an automatic lifting control system for solving the problem of lifting patterns of an aluminum cold rolling mill comprises an uncoiler, a deflection roller, a plate-shaped roller, a coiling machine, an outlet grating, an inlet grating, an upper roller and a lower roller; the two sides of the upper roller are respectively provided with a first bearing, and the two sides of the lower roller are respectively provided with a second bearing; a hydraulic cylinder for driving the lower roller to move along the vertical direction is arranged below the second bearing; a displacement sensor is arranged in the hydraulic cylinder, the travel of the hydraulic cylinder is measured through the displacement sensor, and then the distance between the upper roller and the lower roller, namely a roller gap value h, is calculated; the hydraulic system drives the hydraulic cylinder to move, and comprises a first pressure sensor and a second pressure sensor; the first pressure sensor is arranged on the operation side of the hydraulic system, and the second pressure sensor is arranged on the transmission side of the hydraulic system;
the rolling machine also comprises a rolled strip and a host machine; the main machine is connected with the reduction gearbox, and two shafts output by the reduction gearbox are respectively connected with the universal coupling of the upper roller and the universal coupling of the lower roller; the upper roller and the lower roller are driven to rotate simultaneously through the rotation of the host; the main machine is provided with an encoder, and the rotation speed of the motor is measured through the encoder so as to further calculate the linear speeds V of the upper roller and the lower roller; a spray boom is installed at the inlet side of the upper roller and the lower roller, and the strip and the rollers are lubricated by spraying rolling oil through the spray boom.
In a preferred embodiment, the hydraulic control system further comprises a PLC program controller, a nozzle control device, a first servo valve controller and a second servo valve controller, wherein the first servo valve controller and the second servo valve controller respectively control an operation side and a transmission side of the hydraulic system; the deflection roller, the plate-shaped roller, the uncoiler, the host machine and the coiling machine are respectively connected with an encoder; the deflection roller, the plate-shaped roller, the PLC, the uncoiler, the host machine and the coiling machine are connected in sequence, and signals are transmitted through DP communication; the first pressure sensor, the second pressure sensor, the nozzle control, the inlet grating, the outlet grating, the first servo valve controller and the second servo valve controller are all connected with the PLC program controller.
In a preferred embodiment, the hydraulic system further comprises a first displacement sensor arranged on the operation side of the hydraulic system and a second displacement sensor arranged on the transmission side of the hydraulic system; the first displacement sensor is connected with the PLC through a first MD20B module, and the second displacement sensor is connected with the PLC through a second MD20B module.
The invention also provides an application method of the automatic lifting control system for solving the lifting patterns of the aluminum cold rolling mill, which adopts the automatic lifting control system for solving the lifting patterns of the aluminum cold rolling mill and comprises the following steps:
step S1: the starting condition of the aluminum cold rolling mill is met, and an operator presses an automatic starting button;
step S2: given a target roll gap value H1, h1=inlet strip thickness h+5mm;
step S3: the hydraulic cylinder starts to drive the lower roller to move upwards, and the spray boom beam starts oil spraying lubrication at the same time;
step S4: when the detection value h=h1 of the displacement sensor, the hydraulic cylinder stops moving upwards, and the host machine starts to drive the upper roller and the lower roller to rotate at a given target line speed of 3 m/min;
step S5: when the roll linear speed v=3m/min, the hydraulic cylinder continues to move upwards until the first pressure sensor and the second pressure sensor detect that the pressure is greater than 250 tons, which represents that the roll has been pressed against the strip;
step S6: the uncoiler and the coiling machine automatically establish tension, and a host machine gives a target line speed of 15m/min;
step S7: when the roll linear velocity v=15 m/min, the automatic start control is completed and the rolling of the strip is started.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, through properly controlling each step of the aluminum cold rolling mill for starting, prefabricating and solidifying each step in a program, an operator can finish one-key starting by only pressing an automatic starting button, so that the quality problem caused by improper manual operation is avoided. Practice proves that the control method can well solve the problem of generation of the lifting patterns and is well applied to the field.
Drawings
FIG. 1 is a schematic diagram of a lift control of a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of electrical signals of a preferred embodiment of the present invention;
FIG. 3 is a control program step chart of a preferred embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application; as used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
An application method of an automatic lifting control system for solving the lifting patterns of an aluminum cold rolling mill is provided, wherein the automatic lifting control system for solving the lifting patterns of the aluminum cold rolling mill is shown in figure 1 and comprises an uncoiler, a deflection roller, a plate-shaped roller, a coiling machine, an outlet grating, an inlet grating, an upper roller 11 and a lower roller 12; the two sides of the upper roller are respectively provided with a first bearing 13, and the two sides of the lower roller 12 are respectively provided with a second bearing; a hydraulic cylinder 14 for driving the lower roller to move along the vertical direction is arranged below the second bearing; a displacement sensor 15 is arranged in the hydraulic cylinder, the travel of the hydraulic cylinder 14 is measured through the displacement sensor 15, and then a roll gap value h which is the distance between the upper roll 11 and the lower roll 12 is calculated; a hydraulic system 20, wherein the hydraulic system 20 drives the hydraulic cylinder 14 to move, and the hydraulic system 20 comprises a first pressure sensor 21 and a second pressure sensor; the first pressure sensor 21 is arranged on the operation side of the hydraulic system 20, and the second pressure sensor is arranged on the transmission side of the hydraulic system 20; the pressure of the hydraulic cylinder 14 can be detected by the first pressure sensor 21 and the second pressure sensor to determine whether the rolls are pressed against the strip 16, and the sum of the pressures of the first pressure sensor 21 and the second pressure sensor will be greater than 250 tons when the rolls are pressed against the strip 16 depending on the field use.
Also comprising a rolled strip 16 and a host 17; the main machine 17 is connected with a reduction gearbox 18, and two shafts output by the reduction gearbox 18 are respectively connected with a first universal coupling 19 of the upper roller 11 and a second universal coupling of the lower roller 12, and the roller diameters of the upper roller 11 and the lower roller 12 are close, so that the linear speeds of the upper roller 11 and the lower roller 12 can be considered to be consistent; the upper roller 11 and the lower roller 12 are simultaneously driven to rotate by the rotation of the host 17; the host 17 is provided with an encoder, and the linear speeds V of the upper roller 11 and the lower roller 12 are converted by measuring the rotating speed of a motor through the encoder; a spray bar beam is installed at the inlet side of the upper and lower rolls 11 and 12, and the strip and rolls are lubricated by spraying rolling oil through the spray bar beam.
The hydraulic system further comprises a PLC program controller, a nozzle controller, a first servo valve controller and a second servo valve controller, wherein the first servo valve controller and the second servo valve controller respectively control an operation side and a transmission side of the hydraulic system 20; in order to make the movement of the hydraulic cylinder 14 more accurate, the valves driving the hydraulic cylinder 14 to lift and lower are servo valves, 1 each on the transmission side and the operation side. The deflection roller, the plate-shaped roller, the uncoiler, the host machine and the coiling machine are respectively connected with an encoder; the deflection roller, the plate-shaped roller, the PLC, the uncoiler, the host machine and the coiling machine are connected in sequence, and signals are transmitted through DP communication; the first pressure sensor 21, the second pressure sensor, the nozzle control, the inlet grating, the outlet grating, the first servo valve controller and the second servo valve controller are all connected with the PLC program controller.
Further comprising a first displacement sensor arranged on the operating side of the hydraulic system 20 and a second displacement sensor arranged on the transmission side of the hydraulic system; the first displacement sensor is connected with the PLC through a first MD20B module, and the second displacement sensor is connected with the PLC through a second MD20B module.
The electrical signal schematic diagram of this embodiment is shown in fig. 2, the PLC controller for programming selects siemens S7-400 type controller, each encoder signal is connected to each transmission control unit, the transmission unit transmits the signal to the PLC program controller through DP communication, the pressure sensor, the nozzle control, the inlet grating, the outlet grating, and the servo valve controller signal are directly connected to the PLC program controller, the transmission side displacement sensor and the operation side displacement sensor signal are firstly connected to the MD20B module, and then the module transmits the signal to the PLC controller through optical fiber communication, thereby shortening the signal transmission time.
The invention also provides an application method of the automatic lifting control system for solving the lifting patterns of the aluminum cold rolling mill, which adopts the automatic lifting control system for solving the lifting patterns of the aluminum cold rolling mill, and referring to FIG. 3, the application method comprises the following steps:
step S1: the starting condition of the aluminum cold rolling mill is met, and an operator presses an automatic starting button;
step S2: given a target roll gap value H1, h1=inlet strip thickness h+5mm;
step S3: the hydraulic cylinder starts to drive the lower roller to move upwards, and the spray boom beam starts oil spraying lubrication at the same time;
step S4: when the first displacement sensor and the second displacement sensor detect values h=h1, the hydraulic cylinder stops moving upwards, and the host machine starts to drive the upper roller and the lower roller to rotate at a given target line speed of 3 m/min;
step S5: when the roll linear speed v=3m/min, the hydraulic cylinder continues to move upwards until the first pressure sensor and the second pressure sensor detect that the pressure is greater than 250 tons, which represents that the roll has been pressed against the strip;
step S6: the uncoiler and the coiling machine automatically establish tension, and a host machine gives a target line speed of 15m/min;
step S7: when the roll linear velocity v=15 m/min, the automatic start control is completed and the rolling of the strip is started.
In order to avoid unsmooth manual operation of operators and increase the workload, the embodiment realizes automatic control through programming and solidification in a program, the operators only need to press an automatic start button, and the aluminum cold rolling mill can automatically start according to the steps, so that manual intervention is not needed, the workload of the operators is reduced, and the time is saved. To prevent the operator from pressing the button by mistake, the present embodiment needs to start the automatic lift only if the automatic lift condition is satisfied. Which comprises the following conditions:
the operation condition of the host is met and is in a stop state;
the uncoiler and the coiling machine meet the running conditions and are in a stop state;
the plate-shaped roller and the deflection roller meet the running conditions and are in a stop state;
the hydraulic system operates normally;
the nozzle system has no fault;
the displacement sensor and the pressure sensor have no faults;
the inlet and outlet gratings are all provided with detected strips;
according to the invention, through properly controlling each step of the aluminum cold rolling mill for starting, prefabricating and solidifying each step in a program, an operator can finish one-key starting by only pressing an automatic starting button, so that the quality problem caused by improper manual operation is avoided. Practice proves that the control method can well solve the problem of generation of the lifting patterns and is well applied to the field.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (4)

1. An automatic lifting control system for solving the problem of lifting patterns of an aluminum cold rolling mill is characterized by comprising an uncoiler, a deflection roller, a plate-shaped roller, a coiling machine, an outlet grating, an inlet grating, an upper roller and a lower roller; the two sides of the upper roller are respectively provided with a first bearing, and the two sides of the lower roller are respectively provided with a second bearing; a hydraulic cylinder for driving the lower roller to move along the vertical direction is arranged below the second bearing; a displacement sensor is arranged in the hydraulic cylinder, the travel of the hydraulic cylinder is measured through the displacement sensor, and then the distance between the upper roller and the lower roller, namely a roller gap value h, is calculated; the hydraulic system drives the hydraulic cylinder to move, and comprises a first pressure sensor and a second pressure sensor; the first pressure sensor is arranged on the operation side of the hydraulic system, and the second pressure sensor is arranged on the transmission side of the hydraulic system;
the rolling machine also comprises a rolled strip and a host machine; the main machine is connected with the reduction gearbox, and two shafts output by the reduction gearbox are respectively connected with the universal coupling of the upper roller and the universal coupling of the lower roller; the upper roller and the lower roller are driven to rotate simultaneously through the rotation of the host; the main machine is provided with an encoder, and the rotation speed of the motor is measured through the encoder so as to further calculate the linear speeds V of the upper roller and the lower roller; a spray boom is installed at the inlet side of the upper roller and the lower roller, and the strip and the rollers are lubricated by spraying rolling oil through the spray boom.
2. The automatic start control system for solving the problem of aluminum cold rolling mill start patterns according to claim 1, further comprising a PLC program controller, a nozzle control, a first servo valve controller and a second servo valve controller, wherein the first servo valve controller and the second servo valve controller respectively control an operation side and a transmission side of a hydraulic system; the deflection roller, the plate-shaped roller, the uncoiler, the host machine and the coiling machine are respectively connected with an encoder; the deflection roller, the plate-shaped roller, the PLC, the uncoiler, the host machine and the coiling machine are connected in sequence, and signals are transmitted through DP communication; the first pressure sensor, the second pressure sensor, the nozzle control, the inlet grating, the outlet grating, the first servo valve controller and the second servo valve controller are all connected with the PLC program controller.
3. The automatic start control system for solving the problem of start-up patterns of an aluminum cold-rolling mill according to claim 2, further comprising a first displacement sensor provided on an operation side of the hydraulic system and a second displacement sensor provided on a transmission side of the hydraulic system; the first displacement sensor is connected with the PLC through a first MD20B module, and the second displacement sensor is connected with the PLC through a second MD20B module.
4. An application method of an automatic lifting control system for solving the problem of lifting patterns of an aluminum cold rolling mill is characterized by adopting the automatic lifting control system for solving the problem of lifting patterns of the aluminum cold rolling mill according to the claim 3, and comprising the following steps:
step S1: the starting condition of the aluminum cold rolling mill is met, and an operator presses an automatic starting button;
step S2: given a target roll gap value H1, h1=inlet strip thickness h+5mm;
step S3: the hydraulic cylinder starts to drive the lower roller to move upwards, and the spray boom beam starts oil spraying lubrication at the same time;
step S4: when the first displacement sensor and the second displacement sensor detect values h=h1, the hydraulic cylinder stops moving upwards, and the host machine starts to drive the upper roller and the lower roller to rotate at a given target line speed of 3 m/min;
step S5: when the roll linear speed v=3m/min, the hydraulic cylinder continues to move upwards until the first pressure sensor and the second pressure sensor detect that the pressure is greater than 250 tons, which represents that the roll has been pressed against the strip;
step S6: the uncoiler and the coiling machine automatically establish tension, and a host machine gives a target line speed of 15m/min;
step S7: when the roll linear velocity v=15 m/min, the automatic start control is completed and the rolling of the strip is started.
CN202310217217.7A 2023-03-08 2023-03-08 Automatic starting control system for solving problem of aluminum cold rolling mill starting patterns and application method Pending CN116078829A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310217217.7A CN116078829A (en) 2023-03-08 2023-03-08 Automatic starting control system for solving problem of aluminum cold rolling mill starting patterns and application method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310217217.7A CN116078829A (en) 2023-03-08 2023-03-08 Automatic starting control system for solving problem of aluminum cold rolling mill starting patterns and application method

Publications (1)

Publication Number Publication Date
CN116078829A true CN116078829A (en) 2023-05-09

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ID=86206640

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310217217.7A Pending CN116078829A (en) 2023-03-08 2023-03-08 Automatic starting control system for solving problem of aluminum cold rolling mill starting patterns and application method

Country Status (1)

Country Link
CN (1) CN116078829A (en)

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