CN115404713A - Automatic compensation control method for controlling sizing machine roller combination of calender - Google Patents
Automatic compensation control method for controlling sizing machine roller combination of calender Download PDFInfo
- Publication number
- CN115404713A CN115404713A CN202211081387.9A CN202211081387A CN115404713A CN 115404713 A CN115404713 A CN 115404713A CN 202211081387 A CN202211081387 A CN 202211081387A CN 115404713 A CN115404713 A CN 115404713A
- Authority
- CN
- China
- Prior art keywords
- roller
- torque
- plc
- movable roller
- fixed
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Software Systems (AREA)
- Paper (AREA)
Abstract
The invention discloses an automatic compensation control method for controlling a sizing machine roller closing of a calender, which is characterized by comprising the steps of calculating compensation values of two closed motors through a PLC (programmable logic controller) according to an automatic compensation algorithm, and automatically compensating the torques 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 kept unchanged after being closed. The automatic compensation device automatically compensates the fixed roller and the movable roller at the moment when the movable roller and the fixed roller are combined, so that the torque of the movable roller and the fixed roller is kept unchanged, the instantaneous speed fluctuation of the combined roller is reduced, the paper breaking is avoided, meanwhile, the force transmitted between the press areas 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 sizing machine roller combination of a calender, in particular to an automatic compensation control method for controlling the sizing machine roller combination of the calender.
Background
The traditional roll combining and load distributing algorithm of the sizing machine and the calender is that after a nip closing signal is received, one of the roll combining and load distributing algorithm is converted into torque control and adjusted according to the load distributing proportion. Without automatic torque compensation, if the upper roller and the lower roller are not loaded uniformly before closing, the control mode usually has uniform load after closing, which indicates that the load of one roller is born by the other roller, so that the force transmission is carried out in a nip, the friction force born by the rollers is increased, the equipment abrasion is increased, and the load can also cause fluctuation in a moment, so that the speed fluctuation is easy to cause paper breaking.
The traditional control mode of the calender and the sizing machine is that before the nip is closed, the speed control is adopted, and after the nip is closed, one of the speed control and the torque control is changed into torque control, but the torque is divided equally, and the load distribution proportion can only be manually adjusted. Most often, the two roll nips are opened with a load higher than one, for example 80% of a top roll, and 20% of the load, and after closing both motors become 50%, and the size press and the calender usually make the rolls with paper, and the instant of making the rolls change from 80% to 50% of the load, and from 20% to 50% of the load, which causes speed fluctuations, resulting in paper breaks.
And for the upper roller, the load per se is 80%, only 50% of the load is output at the end of a motor at present, and the other 30% of the load needs to be output through another roller and needs to be transmitted through a pressure area, so that the roller surface is abraded, the stress is severe, and the service life of the roller surface is shortened. Therefore, an automatic compensation control method for controlling a sizing roller and a combining roller of a calender is provided.
Disclosure of Invention
The invention aims to provide an automatic compensation control method for controlling sizing and combining rolls of a calender.
In order to achieve the aim, the invention provides an automatic compensation control method for controlling a sizing machine roller of a calender, which adopts the following technical scheme and is characterized by comprising the following steps of:
1) The motor is controlled by the PLC controller to respectively drive the movable roller and the fixed roller to rotate;
2) Detecting the torque of two motors which respectively drive a movable roller and a fixed roller to act before roller combination through a frequency converter, and sending the torque to a PLC (programmable logic controller);
3) The PLC records the torque before the movable roller and the fixed roller are combined, and calculates and stores the average value of the torque in the X period of time before the roller is combined;
4) When the movable roller and the fixed roller are combined, whether the movable roller and the fixed roller are closed or not is sensed through the proximity switch, and a signal is sent to the PLC after the closing is sensed;
5) After the PLC receives the closing signal, the fixed roller or the movable roller of the controller is converted into torque control, and the other is still speed control;
6) Meanwhile, the PLC calculates compensation values for the two motors after closing according to an automatic compensation algorithm, and automatically compensates the torques 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 ensured to be unchanged after being closed;
7) And automatically compensating the closed torque of the movable roller and the fixed roller, and simultaneously distributing the extra load generated during closing to the movable roller and the fixed roller through the PLC, wherein the proportion of the extra load distribution is set in the PLC in advance.
Furthermore, the interval value of X is set in the PLC, the interval value of a period of time before closing is set, and the PLC controls the frequency converter to adjust the average torque value in real time.
Further, setting the torque before the movable roll is closed to Tmovable = b, the torque before the fixed roll is closed to Tfixed = a, setting the increased load during closing to Tnip = c, setting the load distribution coefficient of the movable roll to d, and compensating the torque of the movable roll to Tmovable comp = b-d a + d c; the fixed roll torque compensation is T fixed comp = (1-d) × c.
The invention automatically compensates the fixed roller and the movable roller at the moment of combining the movable roller and the fixed roller, thereby keeping the torque of the movable roller and the fixed roller unchanged, reducing the instantaneous speed fluctuation of the combined roller, avoiding the generation of paper break, simultaneously having small force transmitted between the press areas, reducing the friction between the movable roller and the fixed roller, reducing the equipment abrasion and prolonging the service life.
Drawings
FIG. 1 is a control flow diagram of the present invention.
Detailed Description
The automatic compensation control method for controlling the sizing roller and the laminating roller of the calender is further described below by combining the attached drawings.
Referring to fig. 1, an automatic compensation control method for controlling a calender size press-fit roll is characterized in that the control method includes:
firstly, a calender or a sizing machine is started through a PLC controller, and a movable roller and a fixed roller are respectively driven to rotate through a motor;
then, detecting the torque of two motors which respectively drive the movable roller and the fixed roller to act before roller combination through a frequency converter, and sending the torque to a PLC (programmable logic controller);
the PLC controller records the torque before the movable roller and the fixed roller are combined in real time, and sets the value X of the interval of the values before the roller combination in the PLC controller, for example, the torque value will fluctuate certainly 200 seconds before the values are combined, so the average value is stable, the value X changes in real time, and the torque is also adjusted in real time and is more stable;
when the movable roller and the fixed roller are combined, whether the movable roller and the fixed roller are closed or not is sensed through the proximity switch, and a signal is sent to the PLC after the closing is sensed;
after the PLC receives the closing signal, the fixed roller or the movable roller of the controller is converted into torque control, and the other is still speed control;
meanwhile, at the closing moment, the PLC calculates compensation values for the two motors after closing according to an automatic compensation algorithm, and automatically compensates the torques 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 ensured to be kept unchanged after being closed;
the closed torque of the movable roller and the closed torque of the fixed roller are automatically compensated, and meanwhile, the additional load generated during closing is distributed to the movable roller and the fixed roller through the PLC.
The algorithm for automatically compensating the numerical value is as follows: setting the torque before the closing of the movable roller as Tmovable = b, the torque before the closing of the fixed roller as Tfixed = a, setting the increased load during the closing as Tnip = c, setting the load distribution coefficient of the movable roller as d,
the movable roller torque compensation Touttato is characterized in that the movable roller torque compensation Touttato is comp = b-d a + d c;
the fixed roll torque compensation is T fixed comp = (1-d) × c;
the range of the load distribution coefficient of the moving roll is 0-10, and the distribution coefficient is set in advance in the PLC;
when b =20% and a =60% before the roller combination, b is still 20% and a is still 60% after the roller combination is carried out through automatic compensation during the roller combination;
the control precision is obviously improved through the algorithm, the torque of the movable roller and the fixed roller is kept unchanged, the instantaneous speed fluctuation of the combined roller is reduced, the paper breaking is avoided, meanwhile, the force transmitted between the press areas 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.
The scope of protection of the invention is not limited to the above embodiments and variations thereof. The present invention is not limited to the above embodiments, but may be modified in various ways.
Claims (3)
1. An automatic compensation control method for controlling a sizing machine roller of a calender is characterized by comprising the following steps:
1) The motor is controlled by the PLC controller to respectively drive the movable roller and the fixed roller to rotate;
2) Detecting the torque of two motors which respectively drive a movable roller and a fixed roller to act before roller combination through a frequency converter, and sending the torque to a PLC (programmable logic controller);
3) The PLC records the torque before the movable roller and the fixed roller are combined, and calculates and stores the average value of the torque in the X period of time before the roller is combined;
4) When the movable roller and the fixed roller are combined, whether the movable roller and the fixed roller are closed or not is induced through a proximity switch, and a signal is sent to a PLC (programmable logic controller) after the closing is induced;
5) After the PLC receives the closing signal, the fixed roller or the movable roller of the controller is converted into torque control, and the other is still speed control;
6) Meanwhile, the PLC calculates compensation values for the two motors after closing according to an automatic compensation algorithm, and automatically compensates the torques 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 ensured to be kept unchanged after being closed;
7) And automatically compensating the closed torque of the movable roller and the fixed roller, and simultaneously distributing the extra load generated during closing to the movable roller and the fixed roller through the PLC, wherein the proportion of the extra load distribution is set in the PLC in advance.
2. The control method according to claim 1, characterized in that: and setting the interval value of the X in the PLC, setting the interval value of a period of time before closing, and controlling the frequency converter to adjust the average torque value in real time through the PLC.
3. The control method according to claim 1, characterized in that: setting the torque before the closing of the movable roller as Tmotion = b, the torque before the closing of the fixed roller as Tfixed = a, setting the increased load during the closing as Tnip = c, setting the load distribution coefficient of the movable roller as d, and setting the torque compensation of the movable roller as Tc = b-d a + d c; the fixed roller torque compensation 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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115404713A true CN115404713A (en) | 2022-11-29 |
| CN115404713B CN115404713B (en) | 2023-04-21 |
Family
ID=84163501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211081387.9A Active CN115404713B (en) | 2022-09-06 | 2022-09-06 | Automatic compensation control method for controlling combination roller of sizing machine of calender |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115404713B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58108988A (en) * | 1981-11-18 | 1983-06-29 | ゼネラル・エレクトリツク・カンパニイ | Speed compensating method and device by abrupt load variation of metal rolling mill |
| JP2008106374A (en) * | 2006-10-23 | 2008-05-08 | Yaskawa Electric Corp | Controller for electric motor for driving calender roll and method for controlling the same |
| CN103072841A (en) * | 2013-01-09 | 2013-05-01 | 安徽马钢工程技术有限公司 | 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 |
| CN114987429A (en) * | 2021-02-22 | 2022-09-02 | 丰田自动车株式会社 | Vehicle drive device |
-
2022
- 2022-09-06 CN CN202211081387.9A patent/CN115404713B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58108988A (en) * | 1981-11-18 | 1983-06-29 | ゼネラル・エレクトリツク・カンパニイ | Speed compensating method and device by abrupt load variation of metal rolling mill |
| JP2008106374A (en) * | 2006-10-23 | 2008-05-08 | Yaskawa Electric Corp | Controller for electric motor for driving calender roll and method for controlling the same |
| CN103072841A (en) * | 2013-01-09 | 2013-05-01 | 安徽马钢工程技术有限公司 | 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 |
| CN114987429A (en) * | 2021-02-22 | 2022-09-02 | 丰田自动车株式会社 | Vehicle drive device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115404713B (en) | 2023-04-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6378346B1 (en) | Steckel hot rolling mill | |
| CN101099977A (en) | Finish rolling machine strip steel threading between frames movable sleeve controlling method | |
| CN109351784A (en) | It is a kind of to be related to the loop control method on hot-strip head | |
| MX2008015928A (en) | A process for controlling torque in a calendering system. | |
| CN101091965A (en) | Method for controlling load balance of rolling mill for cold rolled steel strip driven by dual electrical motors | |
| CN109967532A (en) | The method for preventing hot-strip mm finishing mill unit from skidding | |
| US6095039A (en) | Apparatus for treating a product web | |
| CN115404713A (en) | Automatic compensation control method for controlling sizing machine roller combination of calender | |
| CN1925932B (en) | Method and device for driving support rollers on a continuous casting machine for molten metals in particular for molten steel materials | |
| CN102271831B (en) | Method for adjusting a drive load for a plurality of drives of a mill train for rolling rolling stock, control and/or regulation device, storage medium, program code and rolling mill | |
| CN102022313A (en) | Control system and method of air compressor unit | |
| EP0375095A3 (en) | Method and device for controlling the strip width during the hot-rolling of strip | |
| US8505844B2 (en) | Method for operating a winding machine | |
| CN100496781C (en) | Median plate four-high mill single side following type load equalization control method | |
| CN101229566A (en) | Continuous rolling mill entrance region tight rolls system and control method thereof | |
| CA1223651A (en) | Control device for a roll press | |
| US5528798A (en) | Draw frame and process for the operation of a draw frame responsive to silver sensing | |
| EP0875303A3 (en) | Method for operating a rolling mill for warm and cold rolling flat products | |
| CN115888964A (en) | Automatic control system for abnormal vibration of roller press and roller press | |
| CN113578974B (en) | Vertical roller mill and control method and control system thereof | |
| CN102029295A (en) | Automatic velocity correction method for strip tension control on cold rolling processing line | |
| KR100226913B1 (en) | Control method of flow rate of rolling oil in response to rolling load and velocity | |
| CN101750996B (en) | Method for controlling pinching roll for coiler to distribute steel | |
| CN110090867A (en) | A method of piling of steel between edger roll and plain-barreled roll when plain-barreled roll being prevented to sting steel | |
| CN117046902A (en) | Control method for preventing pinch roll of width fixing machine from being not bitten |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
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 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |