CN115404713B - Automatic compensation control method for controlling combination roller of sizing machine of calender - Google Patents
Automatic compensation control method for controlling combination roller of sizing machine of calender Download PDFInfo
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- CN115404713B CN115404713B CN202211081387.9A CN202211081387A CN115404713B CN 115404713 B CN115404713 B CN 115404713B CN 202211081387 A CN202211081387 A CN 202211081387A CN 115404713 B CN115404713 B CN 115404713B
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- roller
- torque
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0009—Paper-making control systems
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/0073—Accessories for calenders
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0009—Paper-making control systems
- D21G9/0045—Paper-making control systems controlling the calendering or finishing
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0009—Paper-making control systems
- D21G9/0054—Paper-making control systems details of algorithms or programs
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/78—Controlling or regulating not limited to any particular process or apparatus
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Abstract
The invention discloses an automatic compensation control method for controlling a press-calender sizing machine roller combination, which is characterized by comprising the steps of calculating compensation values of two motors after closing according to an automatic compensation algorithm through a PLC (programmable logic controller), and automatically compensating the torque of the two motors through a frequency converter according to the calculated compensation values; the torque of the movable roller and the fixed roller is ensured to be unchanged after the movable roller and the fixed roller are closed. According to the invention, the fixed roller and the movable roller are automatically compensated at the moment of combining the movable roller and the fixed roller, so that the torque of the movable roller and the fixed roller is kept unchanged, the moment speed fluctuation of the combined roller is reduced, paper breakage is avoided, meanwhile, the force transmitted in a pressing zone is small, the friction between the movable roller and the fixed roller is reduced, the equipment abrasion is reduced, and the service life is prolonged.
Description
Technical Field
The invention relates to automatic compensation of a press-calender sizing machine roller, in particular to an automatic compensation control method for controlling the press-calender sizing machine roller.
Background
The roller combination and load distribution algorithm of the traditional sizing machine and the calender is that after receiving the nip closing signal, one of the roller combination and load distribution algorithms is converted into torque control, and the torque control is adjusted according to the load distribution proportion. If the loads of the upper roller and the lower roller are inconsistent before closing, the loads of the upper roller and the lower roller are generally consistent after closing in the control mode, which means that the load of one roller is partially born by the other roller, so that force transmission is carried out in a nip, the friction force born by the rollers is increased, the equipment abrasion is increased, the load can be fluctuated instantaneously, and the speed fluctuation is easy to cause paper breakage.
The traditional calender and the sizing machine control mode are speed control before the nip is closed, one of them is changed into torque control after the nip is closed, but the torque is halved, and the load distribution proportion can only be manually adjusted. The most common two roll nips open with one load higher and one load lower, such as an upper roll load of 80%, a load of 20%, and both motors become 50% after closing, and sizing and calendaring machines typically carry paper rolls in combination with one load changing from 80% to 50% and one from 20% to 50% at the instant of the roll combination, which causes speed fluctuations and breaks.
For the upper roller, the load is 80%, only 50% of the current motor end is output, and the other 30% of the current motor end is output through the other roller, and force is transmitted through the pressing area, so that the roller surface is worn, the stress is serious, and the service life of the roller surface is reduced. For this purpose, an automatic compensation control method for controlling the roller combination of a calender sizing machine is provided.
Disclosure of Invention
The invention aims to solve the problems and provides an automatic compensation control method for controlling the roller combination of a sizing machine of a calender.
In order to achieve the above purpose, the invention provides an automatic compensation control method for controlling the combination roller of a calender sizing machine, which is characterized by comprising the following steps:
1) The motor is controlled by the PLC to drive the movable roller and the fixed roller to rotate respectively;
2) Detecting the torques of two motors respectively driving the movable roller and the fixed roller to act before roller combination through a frequency converter, and transmitting the torques to a PLC;
3) The PLC controller records the torque before the roller combination of the movable roller and the fixed roller, and calculates and stores the average value of the torque in X period of time before roller combination;
4) When the movable roller and the fixed roller are combined, sensing whether the movable roller and the fixed roller are closed or not through a proximity switch, and sending a signal to a PLC (programmable logic controller) after sensing the closing;
5) After receiving the closing signal, the PLC controller controls the roller making or the roller moving to be turned into torque control, and the other one is still in speed control;
6) Meanwhile, the PLC calculates compensation values of the two motors after being closed according to an automatic compensation algorithm, and automatically compensates the torque of the two motors through the frequency converter according to the calculated compensation values; the torque of the movable roller and the fixed roller is kept unchanged after the movable roller and the fixed roller are closed;
7) And the additional load generated during closing is distributed to the movable roller and the fixed roller through the PLC while the torque of the movable roller and the fixed roller after closing is automatically compensated, and the additional load distribution proportion is set in the PLC in advance.
Further, the interval value of X is set in the PLC controller, the interval value of a period of time before closing is set, and the frequency converter is controlled by the PLC controller to adjust the average torque value in real time.
Further, the torque before the movable roller is closed is set to be T Dynamic movement =b, torque before fixed roller closing is T Fixing device Let the load added at closing be T =a nip Let c, set the dynamic roll load distribution coefficient to d, dynamic roll torque compensation T Dynamic comp =b-d×a+d×c; the torque compensation of the fixed roller is T Fixed comp =（1-d）×c。
According to the invention, the fixed roller and the movable roller are automatically compensated at the moment of combining the movable roller and the fixed roller, so that the torque of the movable roller and the fixed roller is kept unchanged, the moment speed fluctuation of the combined roller is reduced, paper breakage is avoided, meanwhile, the force transmitted in the pressing section is small, the friction between the movable roller and the fixed roller is reduced, the equipment abrasion is reduced, and the service life is prolonged.
Drawings
Fig. 1 is a schematic diagram of the control flow of the present invention.
Detailed Description
The invention further provides an automatic compensation control method for controlling the roller of the sizing machine of the calender, which is described in the following with reference to the accompanying drawings.
Referring to fig. 1, an automatic compensation control method for controlling a roll-in of a calender size machine is characterized in that the control method comprises the following steps:
firstly, a calender or a sizing machine is started by a PLC controller, and a movable roller and a fixed roller are respectively driven to rotate by a motor;
then detecting the torques of two motors respectively driving the movable roller and the fixed roller to act before roller combination through a frequency converter, and transmitting the torques to a PLC;
the PLC controller records the torque before the movable roller and the fixed roller are combined, a value X of a value interval before the rollers are combined is set in the PLC controller, for example, 200 seconds before the rollers are combined, the torque value certainly has certain fluctuation, so that the average value is stable, the X value is changed in real time, and the torque is adjusted in real time and is more stable;
when the movable roller and the fixed roller are combined, sensing whether the movable roller and the fixed roller are closed or not through a proximity switch, and sending a signal to a PLC (programmable logic controller) after sensing the closing;
after receiving the closing signal, the PLC controller controls the roller making or the roller moving to be turned into torque control, and the other one is still in speed control;
meanwhile, the PLC calculates compensation values of the two motors after closing according to an automatic compensation algorithm at the moment of closing, and automatically compensates the torque of the two motors through the frequency converter according to the calculated compensation values; the torque of the movable roller and the fixed roller is kept unchanged after the movable roller and the fixed roller are closed;
the automatic compensation device has the advantages that the torque of the closed movable roller and the torque of the closed fixed roller are automatically compensated, meanwhile, the additional load generated during the closing process is distributed to the movable roller and the fixed roller through the PLC, the additional load can be obtained through experiments in the test stage before use, the additional load is generally smaller, the additional load can be distributed, the additional load can also not be distributed, the distribution proportion can be set in the PLC in advance, and therefore the additional load can be distributed to the movable roller and the fixed roller according to the set proportion instantly during the closing process.
The algorithm of the automatic compensation value is as follows: setting the torque before closing the movable rollerIs T Dynamic movement =b, torque before fixed roller closing is T Fixing device Let the load added at closing be T =a nip C, setting the dynamic roll load distribution coefficient to d,
dynamic roll torque compensation T Dynamic comp =b-d×a+d×c；
The torque compensation of the fixed roller is T Fixed comp =（1-d）×c；
The dynamic roll load distribution coefficient d ranges from 0 to 10, and the distribution coefficient is set in the PLC controller in advance;
when b=20% before roller combination and a=60%, b is still 20% after roller combination and a is still 60% after roller combination through automatic compensation in roller combination;
the algorithm obviously increases the control precision, ensures that the torque of the movable roller and the fixed roller is kept unchanged, reduces the instantaneous speed fluctuation of the combined roller, avoids paper breakage, reduces the friction between the movable roller and the fixed roller, reduces the equipment abrasion, and prolongs the service life, and meanwhile, the force transmitted in the pressing section is small.
The scope of protection of the present invention is not limited to the above embodiments and variations thereof. Conventional modifications and substitutions by those skilled in the art based on the content of the present embodiment fall within the protection scope of the present invention.
Claims (3)
1. An automatic compensation control method for controlling the roller combination of a sizing machine of a calender is characterized by comprising the following steps:
1) The motor is controlled by the PLC to drive the movable roller and the fixed roller to rotate respectively;
2) Detecting the torques of two motors respectively driving the movable roller and the fixed roller to act before roller combination through a frequency converter, and transmitting the torques to a PLC;
3) The PLC controller records the torque before the roller combination of the movable roller and the fixed roller, and calculates and stores the average value of the torque in X period of time before roller combination;
4) When the movable roller and the fixed roller are combined, sensing whether the movable roller and the fixed roller are closed or not through a proximity switch, and sending a signal to a PLC (programmable logic controller) after sensing the closing;
5) After receiving the closing signal, the PLC controller controls the roller making or the roller moving to be turned into torque control, and the other one is still in speed control;
6) Meanwhile, the PLC calculates compensation values of the two motors after being closed according to an automatic compensation algorithm, and automatically compensates the torque of the two motors through the frequency converter according to the calculated compensation values; the torque of the movable roller and the fixed roller is kept unchanged after the movable roller and the fixed roller are closed;
7) And the additional load generated during closing is distributed to the movable roller and the fixed roller through the PLC while the torque of the movable roller and the fixed roller after closing is automatically compensated, and the additional load distribution proportion is set in the PLC in advance.
2. The control method according to claim 1, characterized in that: the interval value of X is set in a PLC controller, the interval value of a period of time before closing is set, and the frequency converter is controlled by the PLC controller to adjust the average torque value in real time.
3. The control method according to claim 1, characterized in that: setting the torque before closing the movable roller as T Dynamic movement =b, torque before fixed roller closing is T Fixing device Let the load added at closing be T =a nip Let c, set the dynamic roll load distribution coefficient to d, dynamic roll torque compensation T Dynamic comp =b-d×a+d×c; the torque compensation of the fixed roller is T Fixed comp =（1-d）×c。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211081387.9A CN115404713B (en) | 2022-09-06 | 2022-09-06 | Automatic compensation control method for controlling combination roller of sizing machine of calender |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211081387.9A CN115404713B (en) | 2022-09-06 | 2022-09-06 | Automatic compensation control method for controlling combination roller of sizing machine of calender |
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| Publication Number | Publication Date |
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| CN115404713A CN115404713A (en) | 2022-11-29 |
| CN115404713B true CN115404713B (en) | 2023-04-21 |
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| CN202211081387.9A Active CN115404713B (en) | 2022-09-06 | 2022-09-06 | Automatic compensation control method for controlling combination roller of sizing machine of calender |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3242131A1 (en) * | 1981-11-18 | 1983-05-26 | General Electric Co., Schenectady, N.Y. | Control arrangement for a metal rolling mill and a method for compensating shock loading |
| JP4888044B2 (en) * | 2006-10-23 | 2012-02-29 | 株式会社安川電機 | Calendar roll driving motor control device and control method thereof |
| CN103072841B (en) * | 2013-01-09 | 2015-04-01 | 安徽马钢工程技术集团有限公司 | Tension roll control device for plate and strip processing line and tension control method |
| DE102017119906A1 (en) * | 2017-08-30 | 2019-02-28 | Volkswagen Aktiengesellschaft | Method for operating a hybrid powertrain, control unit and motor vehicle |
| JP2022128337A (en) * | 2021-02-22 | 2022-09-01 | トヨタ自動車株式会社 | Vehicle drive device |
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Denomination of invention: An automatic compensation control method for controlling the gluing roller of the calender and glue applicator Effective date of registration: 20230711 Granted publication date: 20230421 Pledgee: Hangzhou branch of Bank of Nanjing Co.,Ltd. Pledgor: Hangzhou Lanhai Tuofan Technology Co.,Ltd. Registration number: Y2023980047830 |