CN117566503A - Tension control method, device and controller based on constant tension and constant linear velocity - Google Patents
Tension control method, device and controller based on constant tension and constant linear velocity Download PDFInfo
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- CN117566503A CN117566503A CN202311758703.6A CN202311758703A CN117566503A CN 117566503 A CN117566503 A CN 117566503A CN 202311758703 A CN202311758703 A CN 202311758703A CN 117566503 A CN117566503 A CN 117566503A
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 91
- 238000004804 winding Methods 0.000 claims abstract description 75
- 238000012545 processing Methods 0.000 claims abstract description 71
- 238000001514 detection method Methods 0.000 claims description 34
- 238000004590 computer program Methods 0.000 claims description 14
- 238000012549 training Methods 0.000 claims description 12
- 238000007781 pre-processing Methods 0.000 claims description 6
- 238000012795 verification Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 description 33
- 230000003321 amplification Effects 0.000 description 11
- 238000003199 nucleic acid amplification method Methods 0.000 description 11
- 239000006247 magnetic powder Substances 0.000 description 9
- 230000007423 decrease Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
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- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
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- 238000004364 calculation method Methods 0.000 description 2
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- 230000033228 biological regulation Effects 0.000 description 1
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- 238000003062 neural network model Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/044—Sensing web tension
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/182—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations
- B65H23/1825—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations and controlling web tension
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
- B65H23/1888—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling web tension
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/195—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in winding mechanisms or in connection with winding operations
- B65H23/1955—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in winding mechanisms or in connection with winding operations and controlling web tension
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- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
Abstract
The application relates to the technical field of tension control of coiled material equipment, in particular to a tension control method, a tension control device and a tension control controller based on constant tension and constant linear speed, which comprise the steps of establishing a coiled material tension processing model, wherein the coiled material tension processing model comprises an unreeling tension sub-model, a middle section tension sub-model and a reeling tension sub-model; acquiring a coiled material tension actual value, wherein the coiled material tension actual value comprises an unreeling tension actual value, a middle section tension actual value and a reeling tension actual value; correlating the actual value of the unreeling tension with the unreeling tension submodel; the actual value of the middle section tension is related to the middle section tension sub-model; the actual winding tension value is related to the winding tension submodel; inputting the actual value of the coil tension into a coil tension processing model to output a processing result, wherein the processing result comprises an unreeling tension adjusting signal, a middle section tension adjusting signal and a reeling tension adjusting signal; and correspondingly transmitting the processing result to the executing end. The method has the beneficial effects of improving tension control stability and improving quality of processed coiled materials.
Description
Technical Field
The application relates to the technical field of tension control of coiled material equipment, in particular to a tension control method, a tension control device and a tension control controller based on constant tension and constant linear velocity.
Background
The tension control system is usually a system integration of a tension sensor and a tension controller, is mainly applied to equipment such as metallurgy, papermaking, films, dyeing and finishing, weaving, plastics, wires and the like, and is an automatic control system for realizing constant tension or taper tension control, and the effect of the tension control system is mainly to realize synchronous control between rollers and uniform control of winding and unwinding.
In the related art, as shown in fig. 1, a tension control system often adopts a combination of a "unreeling shaft + a pulling shaft + a reeling shaft". The tension system is divided into two parts by taking the traction shaft as a boundary line, the unreeling tension control system and the reeling tension control system, the unreeling shaft adopts magnetic powder to adjust torque, the reeling shaft adopts a torque mode of a variable frequency motor, and the traction shaft drives coiled materials to move through the speed control of the variable frequency motor. The tension controller is used for adjusting the torque of the unreeling shaft and the reeling shaft by collecting the tension of the guide roller at the unreeling position and the tension of the guide roller at the reeling position, so that the effect of constant tension control is achieved. Under the condition that the distances between a unwinding shaft and a winding shaft of general small equipment are not far, the system can effectively control tension change of coiled materials, the condition that the tension of the coiled materials is too large or too small is avoided, if the tension is too large, the coiled materials are broken in the winding process, and if the tension is too small, the coiled materials slide in the winding process.
However, with the upgrade of the industrial industry, the equipment is increasingly large, the conveying path of the coiled material is increasingly long, when the conveying path of the coiled material is longer, the distance between the unwinding shaft and the winding shaft is also increasingly long, and a transmission shaft is additionally arranged between the two shafts to enable the coiled material to smoothly pass through.
Disclosure of Invention
In order to improve stability of tension control, the application provides a tension control method, a tension control device and a tension control controller based on constant tension and constant linear velocity.
The first object of the application is to provide a tension control method based on constant tension and constant linear velocity, which adopts the following technical scheme:
a tension control method based on constant tension and constant linear velocity comprises the following steps:
establishing a coiled material tension processing model, wherein the coiled material tension processing model comprises an unreeling tension sub-model, a middle section tension sub-model and a reeling tension sub-model;
Acquiring a coiled material tension actual value, wherein the coiled material tension actual value comprises an unreeling tension actual value, a middle section tension actual value and a reeling tension actual value;
correlating the actual value of the unreeling tension with the unreeling tension submodel; correlating the actual value of the middle section tension with the middle section tension sub-model; correlating the actual winding tension value with the winding tension submodel;
inputting the actual value of the coil tension into the coil tension processing model to output a processing result, wherein the processing result comprises an unreeling tension adjusting signal, a middle section tension adjusting signal and a reeling tension adjusting signal;
and correspondingly transmitting the processing result to an executing end.
Through adopting above-mentioned technical scheme, through establishing coiled material tension treatment model and carrying out analysis processing to the coiled material tension of unreeling, middle section and rolling department, the execution end adjusts the coiled material tension of unreeling, middle section and rolling department according to the processing result, the problem that large-scale tension control equipment can appear tension instability at middle section tension control ring festival has been overcome "unreeling axle + traction shaft + rolling axle" control mode and the middle tension that exists can not take into account for whole tension control system can carry out stable tension control to the coiled material of processing in unreeling department, rolling department even on the driving roller of every department, improved the dynamic performance of large-scale tension control equipment, the quality of processing coiled material has been improved, the defective rate has been reduced.
Preferably, the step of establishing a web tension processing model includes:
collecting tension sample data associated with the web;
preprocessing the tension sample data, carrying out classification marking processing according to a preset classification standard, and establishing a plurality of data sets with labels according to the classification standard; the classification standard is a plurality of different coiled material tension value ranges and a coiled material tension value range which does not reach the standard, and the preprocessing is data precision processing; the data set comprises a test data set, a training data set and a verification data set which are randomly divided in a preset proportion;
building a coiled material tension processing preliminary model, and initializing network parameters and initial learning rate of the coiled material tension processing preliminary model; model training is carried out on the coiled material tension processing preliminary model through the training data set and the verification data set, and parameters are updated; and stopping training after the web tension processing preliminary model converges, and outputting the web tension processing preliminary model at the moment as a web tension processing model.
Through adopting above-mentioned technical scheme, through utilizing neural network model and the tension sample data that gathers in advance to carry out the machine learning to coiled material tension, obtain the best tension value that corresponds different coiled material size and coiled material transmission path length, and can constantly contrast and update iteration to the data, thereby constructed a coiled material tension processing model that can judge whether tension meets the standard fast, make unreeling tension submodel, middle section tension submodel and rolling tension submodel possess specific analysis calculation processing's benchmark, make tension adjustment have unified reference standard, improved coiled material tension adjustment's precision and reliability.
Preferably, the step of inputting the actual value of the web tension into the web tension processing model to output a processing result includes:
inputting the actual value of the middle section tension into a middle section tension sub-model, outputting a middle section tension comparison result by the middle section tension sub-model, and generating a middle section tension adjustment signal according to the middle section tension comparison result;
and judging whether to generate a middle section tension control signal according to the middle section tension adjusting signal.
Through adopting above-mentioned technical scheme, with the actual value input middle section tension sub-model of middle section tension, middle section tension sub-model output middle section tension contrast result, whether the controller analysis handles middle section tension contrast result and judges and need carry out tension adjustment, and generate different middle section tension adjustment signals according to the judgement result, generate different middle section tension control signals according to different middle section tension adjustment signals in order to control the execution end and carry out different regulation operations, in order to realize the control and adjustment to tension, reach the coiled material and be the effect of constant tension when middle section conveying.
Preferably, the step of obtaining the actual value of the web tension includes:
acquiring a rotating speed difference of an executing end close to the unreeling position and an executing end close to the reeling position;
Calculating to obtain an actual value of the middle section tension according to the rotation speed difference: f=, where S is the cross-sectional area definition of the coil, E is the elastic modulus of the coil, L is the coil length at both ends of the first motor and the second motor when not stretched, V1 is the actual rotational speed near the execution end at the unwind, V2 is the actual rotational speed near the execution end at the wind-up, T1 is the moment when the coil leaves the execution end near the unwind, and T2 is the moment when the coil leaves the execution end near the wind-up from the coil near the execution end at the unwind.
By adopting the technical scheme, the actual value of the middle section tension is calculated by acquiring the rotating speed difference between the execution end close to the unreeling position and the execution end close to the reeling position, so that the actual value of the middle section tension is more accurate, tension control is more accurate, and the accuracy of the tension control is improved.
Preferably, the step of obtaining the rotation speed difference between the execution end near the unreeling position and the execution end near the reeling position includes:
acquiring the actual rotating speed of an executing end close to a winding position;
presetting the actual rotating speed of an executing end close to a winding position as a standard rotating speed;
the actual rotation speed of the execution end close to the unreeling position is obtained in real time,
comparing the actual rotating speed of the executing end close to the unreeling position with the standard rotating speed, and obtaining the rotating speed difference of the executing end close to the unreeling position and the executing end close to the reeling position.
By adopting the technical scheme, the actual rotating speed of the executing end close to the winding part is set as the standard rotating speed, the actual rotating speed of the executing end close to the unwinding part is obtained in real time, the difference value between the actual rotating speed of the executing end close to the unwinding part and the standard rotating speed is the rotating speed difference between the two executing ends, and when the rotating speed difference between the two executing ends needs to be changed, only the rotating speed of the executing end close to the unwinding part needs to be changed, so that tension adjustment is more simplified.
Preferably, the step of obtaining the rotation speed difference between the execution end near the unreeling position and the execution end near the reeling position includes:
acquiring the actual rotating speed of the executing end close to the unreeling position and the actual rotating speed of the executing end close to the reeling position in real time;
comparing the actual rotating speed of the executing end close to the unreeling position with the actual rotating speed of the executing end close to the reeling position, and obtaining the rotating speed difference between the executing end close to the unreeling position and the executing end close to the reeling position: v=v2-V1, V1 being the actual rotational speed of the end of the run near the unwind and V2 being the actual rotational speed of the end of the run near the wind-up.
By adopting the technical scheme, the actual rotating speed of the execution end close to the unreeling position and the actual rotating speed of the execution end close to the reeling position are obtained in real time, the difference value between the actual rotating speed of the execution end close to the unreeling position and the actual rotating speed of the execution end close to the reeling position in the same time is the rotating speed difference between the two execution ends, and the rotating speeds of the two execution ends are obtained in real time.
Preferably, the step of comparing the actual value of the middle section tension with the standard value of the middle section tension to obtain a comparison result of the middle section tension includes:
when the actual tension value of the middle section is inconsistent with the standard tension value of the middle section, a first middle section tension comparison result is generated;
and when the actual tension value of the middle section is consistent with the standard tension value of the middle section, generating a second middle section tension comparison result.
By adopting the technical scheme, the actual tension value of the middle section and the standard tension value of the middle section are compared, and a middle section tension comparison result is generated according to the difference between the actual tension value of the middle section and the standard tension value of the middle section so as to provide processing parameters for the controller.
The second purpose of the application is to provide a controller, which adopts the following technical scheme:
a controller comprising a memory and a processor, the memory being electrically connected to the processor, the memory having stored thereon a computer program capable of being loaded by the processor and performing the constant tension, constant linear velocity based tension control method according to any of the above aspects, the processor being adapted to run the computer program.
By adopting the technical scheme, the controller can be a computer, and the operation of the tension control method is realized through the computer, so that the monitoring and the real-time operation of operators are facilitated.
The third purpose of the application is to provide a coiled material conveying device based on constant tension and constant linear velocity, which adopts the following technical scheme:
the utility model provides a coiled material conveyor based on constant tension, constant linear velocity, includes the frame, be provided with controller, unreel tension control assembly, speed difference closed loop tension control assembly and rolling tension control assembly in the frame, the controller is used for carrying out the computer program according to claim 8, unreel tension control assembly speed difference closed loop tension control assembly with rolling tension control assembly horizontal direction sets gradually, unreel tension control assembly includes unreel roller and unreel roller tension detection roller, unreel roller with unreel roller tension detection roller all rotates the bearing in the frame and with the controller electricity is connected, speed difference closed loop tension control assembly includes power supply execution end and middle section tension detection roller, the power supply execution end is provided with two, middle section tension detection roller rotates the bearing in between the power supply execution end, two power supply execution end and middle section tension detection roller all with the controller electricity is connected, rolling tension control assembly includes rolling axle tension detection rolling roller and wind-up roller, axle tension detection roller and wind-up roller all rotate the bearing in the frame and the controller electricity is connected.
Through adopting above-mentioned technical scheme, when unreeling spool tension detecting roller detects actual measurement tension and target tension inconsistent, the rotational speed of unreeling roller is changed in controller control, the actual measurement tension of coiled material when making unreeling is unanimous with target tension, when middle section tension detecting roller detects actual measurement tension and target tension inconsistent, the output of power supply execution end is changed in controller control, make the actual measurement tension of middle section coiled material unanimous with target tension, when winding axle tension detecting roller detects actual measurement tension and target tension inconsistent, the moment of torsion of wind-up roll is changed in controller control, the actual measurement tension of coiled material when making the rolling is unanimous with target tension, thereby make the coiled material when unreeling, the middle section conveying time and the tension when rolling all reach target tension, the problem that the large-scale tension control equipment can appear tension unstability at middle section tension control ring festival has been solved the quality of processing coiled material, the defective rate has been reduced.
In summary, the present application includes at least one of the following beneficial technical effects: the coil tension of the unreeling, middle-section and reeling positions is analyzed and treated by establishing a coil tension treatment model, and the executing end adjusts the coil tension of the unreeling, middle-section and reeling positions according to treatment results, so that the problem that tension instability can occur in a tension control loop of the middle-section of large tension control equipment is solved, the problem that the intermediate tension existing in a control mode of unreeling shaft, traction shaft and reeling shaft cannot be taken into consideration is solved, the whole tension control system can stably control the tension of the processed coil at the unreeling position and the reeling position even on a driving roller at each position, the dynamic performance of the large tension control equipment is improved, the quality of the processed coil is improved, and the reject ratio is reduced.
Drawings
Fig. 1 is a schematic diagram of a tension control system in the related art.
Fig. 2 is a schematic view of a web conveying apparatus according to an embodiment of the present application.
Fig. 3 is a schematic overall structure of the coil conveying apparatus according to the embodiment of the present application.
Fig. 4 is a schematic diagram of the relationship of the first motor and the second motor in the embodiment of the present application.
Fig. 5 is a method flow diagram of an embodiment of the present application.
FIG. 6 is a flow chart of a method of modeling web tension processing in an embodiment of the present application.
Fig. 7 is a flowchart of a method for obtaining a rotational speed difference between an execution end near an unreeling position and an execution end near a reeling position in an embodiment of the present application.
Fig. 8 is a flowchart of a method for obtaining a rotational speed difference between an execution end near an unreeling position and an execution end near a reeling position according to another embodiment of the present application.
Reference numerals illustrate: 1. a frame; 2. a conveying roller; 3. a controller; 4. unreeling tension control components; 41. an unreeling roller; 42. unreeling a spool tension detection roller; 5. a speed differential closed loop tension control assembly; 51. a first motor; 52. a second motor; 53. a middle tension detecting roller; 6. a winding tension control assembly; 61. a take-up spool tension detection roller; 62. and (5) a wind-up roller.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-8.
The embodiment of the application discloses a coiled material conveying device based on constant tension and constant linear velocity. Referring to fig. 2 and 3, the coil conveying device comprises a frame 1, a plurality of conveying rollers 2 are rotatably carried on the frame 1, the conveying rollers 2 are arranged in parallel, and coils are wound on the conveying rollers 2. The machine frame 1 is further provided with a controller 3, an unreeling tension control assembly 4, a speed difference closed-loop tension control assembly 5 and a reeling tension control assembly 6, two ends of the machine frame 1 are respectively arranged at the unreeling position and the reeling position, and the unreeling tension control assembly 4, the speed difference closed-loop tension control assembly 5 and the reeling tension control assembly 6 are sequentially arranged in the horizontal direction. Unreeling tension control assembly 4 sets up in unreeling department, and rolling tension control assembly 6 sets up in rolling department, and speed difference closed loop tension control assembly 5 sets up between unreeling tension control assembly 4 and rolling tension control assembly 6. The plurality of conveying rollers 2 are reasonably arranged between the unreeling tension control assembly 4, the speed difference closed-loop tension control assembly 5 and the reeling tension control assembly 6, and the unreeling tension control assembly 4, the speed difference closed-loop tension control assembly 5 and the reeling tension control assembly 6 are matched with the plurality of conveying rollers 2 to jointly convey coiled materials.
In this embodiment, the controller 3 includes a main controller, a first sub-controller, a second sub-controller and a third sub-controller, where the first sub-controller, the second sub-controller and the third sub-controller are all electrically connected with the main controller, and the main controller controls the first sub-controller, the second sub-controller and the third sub-controller to work respectively. The first branch accuse is used for controlling unreeling tension control assembly 4 to detect and adjust the coiled material tension of unreeling, and the second branch accuse is used for controlling speed difference closed loop tension control assembly 5 to detect and adjust the coiled material tension of middle section conveying, and the third branch accuse is used for controlling rolling tension control assembly 6 to detect and adjust the coiled material tension of rolling. The first sub-controller, the second sub-controller and the third sub-controller are controlled by the main controller to work, so that the unified monitoring and processing of operators are facilitated, and in actual production operation, the first sub-controller, the second sub-controller and the third sub-controller can be independently controlled according to actual requirements, so that the cost input of the main controller is reduced.
Specifically, the unreeling tension control assembly 4 comprises an unreeling roller 41 and an unreeling shaft tension detection roller 42, the unreeling roller 41 and the unreeling shaft tension detection roller 42 are rotatably supported on the frame 1, and the unreeling roller 41 and the unreeling shaft tension detection roller 42 are matched with the conveying roller 2 to convey coiled materials together. The unreeling roller 41 is provided with a power amplification plate and a magnetic powder brake, the power amplification plate is electrically connected with the magnetic powder brake, and the exciting current of the magnetic powder brake is changed through the power amplification plate, so that the magnetic powder brake can achieve a braking effect on the unreeling roller 41, and the unreeling roller 41 can control traction force while unreeling. The first sub-controller is arranged on the frame 1, the unreeling roller 41, the power amplification plate and the unreeling shaft tension detection roller 42 are electrically connected with the first sub-controller, a first tension sensor is arranged on the unreeling shaft tension detection roller 42, and the first tension sensor is electrically connected with the first sub-controller.
Correspondingly, the first tension sensor senses the coiled material tension on the unreeling shaft tension detection roller 42 and generates a first sensing signal and sends the first sensing signal to the first sub-controller, the first sub-controller analyzes and processes the first sensing signal to generate a first control signal and sends the first control signal to the power amplification board, and the power amplification board changes the exciting current of the magnetic powder brake according to the first control signal, so that the magnetic powder brake changes the braking of the unreeling roller 41, and the rotating speed of the unreeling roller 41 is changed. When the controller 3 detects that the actual tension on the unreeling shaft tension detecting roller 42 is smaller than the unreeling target tension, the controller 3 controls the power amplification plate to increase the output, and the power amplification plate increases the output so that the magnetic powder brake increases the braking force, thereby reducing the rotation speed of the unreeling roller 41, and the unreeling speed becomes slow until the web tension increases to the unreeling target tension. When the controller 3 detects that the actual tension on the unreeling shaft tension detecting roller 42 is greater than the unreeling target tension, the controller 3 controls the power amplifying plate to decrease the output, which causes the magnetic powder brake to decrease the braking force, thereby causing the rotational speed of the unreeling roller 41 to increase, and the unreeling speed to become fast until the web tension decreases to the unreeling target tension. By adjusting the output of the power amplification plate, the constant tension of the unreeling part is ensured, and the performance of the tension control system is enhanced in this way, so that the product quality and the production efficiency are better improved.
The coiled material passes through the unreeling shaft tension detection roller 42 and then is conveyed to the speed difference closed-loop tension control assembly 5, wherein the speed difference closed-loop tension control assembly 5 comprises a power source execution end and a middle tension detection roller 53, and two power source execution ends are arranged, and in the embodiment, the two power source execution ends are respectively a first motor 51 and a second motor 52. The first motor 51 and the second motor 52 are arranged on the frame 1 in parallel, the first motor 51 is close to the unreeling roller 41, the transmission roller 2 is fixed on the output shaft of the first motor 51, the second motor 52 is close to the wind-up roller 62, the transmission roller 2 is also fixed on the output shaft of the second motor 52, and the middle section tension detection roller 53 is rotatably supported between the first motor 51 and the second motor 52. The second sub-controller is installed on the frame 1, and the first motor 51, the middle section tension detection roller 53 and the second motor 52 are all connected with the second sub-controller electricity, are provided with the second tension sensor on the middle section tension detection roller 53, and the second tension sensor is connected with the second sub-controller electricity.
After the coiled material entering the speed difference closed loop tension control assembly 5 is wound around the conveying roller 2 passing through the first motor 51, then is wound around the conveying roller 2 passing through the gap between the first motor 51 and the middle tension detection roller 53, then is wound around the gap between the middle tension detection roller 53 and the second motor 52, then is wound around the conveying roller 2 passing through the second motor 52, and then enters the position of the coiling tension control assembly 6. The tension of the coil conveyed in the middle section is formed by the rotation speed difference between the first motor 51 and the second motor 52, when the rotation speed of the first motor 51 is smaller than that of the second motor 52, the tension detected by the tension sensor on the middle section tension detecting roller 53 is increased, and when the rotation speed of the first motor 51 is faster than that of the second motor 52, the tension detected by the tension sensor on the middle section tension detecting roller 53 is reduced.
In one embodiment, the second controller mainly controls the rotation speed of the first motor 51, the rotation speed of the second motor 52 is a fixed value, and correspondingly, the second tension sensor senses the web tension on the middle tension detecting roller 53 and generates a second sensing signal and sends the second sensing signal to the second controller, the second controller analyzes and processes the second sensing signal to generate a second control signal, and the second controller sends the second control signal to the first motor 51 so that the rotation speed of the first motor 51 is changed, and thus the rotation speed difference between the first motor 51 and the second motor 52 is changed. When the actual tension on the intermediate-stage tension detecting roller 53 is greater than the intermediate-stage conveyance target tension, the rotation speed of the first motor 51 is controlled to be increased so that the rotation speed difference between the first motor 51 and the second motor 52 is reduced, thereby increasing the web tension to the intermediate-stage conveyance target tension. When the actual tension on the intermediate stage tension detecting roller 53 is smaller than the intermediate stage conveyance target tension, the control decreases the rotation speed of the first motor 51 so that the rotation speed difference between the first motor 51 and the second motor 52 increases, thereby decreasing the web tension to the intermediate stage conveyance target tension. In another embodiment, the second controller simultaneously controls the rotational speed of the first motor 51 and the rotational speed of the second motor 52 such that the rotational speed difference between the first motor 51 and the second motor 52 is changed, thereby changing the web tension. By adjusting the rotational speed difference between the first motor 51 and the second motor 52, the tension of the conveying portion in the middle of the coiled material is ensured to be constant, and the performance of the tension control system is enhanced in this way, so that the product quality and the production efficiency are improved better.
The coiled material passes through the middle tension detection roller 53 and then is conveyed to enter the coiling tension control assembly 6, and the coiling tension control assembly 6 comprises a coiling shaft tension detection roller 61 and a coiling roller 62, and the coiling shaft tension detection roller 61 and the coiling roller 62 are rotatably borne on the frame 1. The third sub-controller is installed on the frame 1, and the winding shaft tension detection roller 61 and the winding roller 62 are electrically connected with the third sub-controller. The take-up spool tension detecting roller 61 is provided with a third tension sensor electrically connected to a third sub-controller. The tension on the wind-up roller 62 is changed by changing the torque of the servo motor so that the torque of the wind-up roller 62 is changed to realize the change, the coiled material is wound at a certain speed, the torque of the wind-up roller 62 is increased, and the tension detected by the third tension sensor on the wind-up roller 62 is increased. The torque of the wind-up roll 62 decreases and the tension detected by the third tension sensor on the wind-up roll 62 decreases.
The third tension sensor senses the web tension on the web reeling shaft tension detecting roller 61 and sends a third sensing signal to the third sub-controller, the third sub-controller analyzes and processes the third sensing signal to generate a third control signal and sends the third control signal to the servo motor, and the servo motor changes torque according to the third control signal. When the actual tension detected by the take-up shaft tension detecting roller 61 is smaller than the take-up target tension, the torque of the servo motor is increased so that the web tension at the time of taking up is increased to the take-up target tension. When the actual tension on the unwinding shaft tension detecting roller 42 is greater than the winding target tension, the torque of the servo motor is reduced, so that the coil tension during winding is reduced to the winding target tension, the tension of the winding part is ensured to be constant by adjusting the torque of the servo motor, and the performance of the tension control system is enhanced in this way, so that the product quality and the production efficiency are better improved.
Correspondingly, when the first tension sensor detects that the coiled material tension during unreeling is inconsistent with the unreeling target tension, the first sub-controller controls to change the rotating speed of the unreeling roller 41 so that the coiled material tension during unreeling is consistent with the unreeling target tension. When the second tension sensor detects that the tension of the coiled material conveyed by the middle section is inconsistent with the target tension conveyed by the middle section, the second controller controls and changes the rotation speed difference of the first motor 51 and the second motor 52 so that the tension of the coiled material conveyed by the middle section is consistent with the target tension conveyed by the middle section. When the third tension sensor detects that the coiled material tension in the coiling process is inconsistent with the coiling target tension, the third sub-controller controls to change the torque of the coiling roller 62 so that the coiled material tension in the coiling process is consistent with the coiling target tension. Therefore, the tension of the coiled material reaches the corresponding target tension when the coiled material is unreeled, conveyed in the middle section and wound, the problem that the tension of the large tension control equipment is unstable in the tension control loop in the middle section is solved, the quality of the processed coiled material is improved, and the reject ratio is reduced.
The application also discloses a tension control method based on constant tension and constant linear velocity, which is implemented based on the device in the embodiment. Referring to fig. 5, the method includes:
S1, establishing a coiled material tension processing model, wherein the coiled material tension processing model comprises an unreeling tension sub-model, a middle section tension sub-model and a reeling tension sub-model.
And an operator carries out coil tension processing modeling according to the size of the coil which is actually required to be processed and tension control equipment which is used, wherein the coil tension processing model comprises an unreeling tension sub-model, a middle section tension sub-model and a reeling tension sub-model.
S2, acquiring a coiled material tension actual value, wherein the coiled material tension actual value comprises an unreeling tension actual value, a middle section tension actual value and a reeling tension actual value.
The first sub-controller analyzes and processes the coiled material tension data sensed by the first sensor to obtain an unreeling tension actual value, the second sub-controller analyzes and processes the coiled material tension data sensed by the second sensor to obtain a middle section tension actual value, and the third sub-controller analyzes and processes the coiled material tension data sensed by the third sensor to obtain a reeling tension actual value.
S3, associating the actual unreeling tension value with the unreeling tension submodel; the actual value of the middle section tension is related to the middle section tension sub-model; and correlating the actual winding tension value with the winding tension submodel.
S4, inputting the actual value of the coil tension into a coil tension processing model to output a processing result, wherein the processing result comprises an unreeling tension adjusting signal, a middle section tension adjusting signal and a reeling tension adjusting signal.
S5, the processing result is correspondingly sent to the execution end.
When it is determined that the unreeling tension control signal is generated, the master controller controls the first sub-controller to transmit the unreeling tension control signal to the power amplification plate, so that the power amplification plate adjusts the rotation speed of the unreeling roller 41. When it is determined that the middle-stage tension control signal is generated, the main controller controls the second sub-controller to adjust the rotation speed difference between the first motor 51 and the second motor 52 according to the middle-stage tension control signal, so that the web tension when the middle stage is conveyed is changed. When it is determined that the winding tension control signal is generated, the master controller controls the first sub-controller to transmit the winding tension control signal to the servo motor so that the torque of the servo motor is changed to adjust the torque of the winding roller 62.
Specifically, as shown in fig. 6, step S1 includes:
s11, collecting tension sample data of the coiled material on tension control equipment;
s12, preprocessing the tension initial data, carrying out classification marking processing according to a preset classification standard, and establishing a plurality of data sets with labels according to the classification standard; the classification standard is a plurality of different coiled material tension value ranges and a coiled material tension value range which does not reach the standard, and the preprocessing is data precision processing; the data set comprises a test data set, a training data set and a verification data set which are randomly divided in a preset proportion;
S13, building a coiled material tension processing preliminary model, and initializing network parameters and initial learning rate of the coiled material tension processing preliminary model; model training is carried out on the coiled material tension processing preliminary model through the training data set and the verification data set, and parameters are updated; and stopping training after the web tension processing preliminary model converges, and outputting the web tension processing preliminary model at the moment as a web tension processing model.
In this embodiment, an operator trains the web tension through the web tension processing model according to actual production requirements, the sample data includes the web size and the conveying length of the tension control device, and the web size and the conveying length of the tension control device are input into the web tension processing model to obtain the optimal unreeling target tension, the intermediate section conveying target tension and the reeling target tension corresponding to the web size and the web conveying path length. Setting the obtained unreeling target tension as an unreeling tension standard value when the tension control equipment unreels, setting the obtained middle section transmission target tension as a middle section tension standard value when the tension control equipment middle section transmits, and setting the obtained unreeling target tension as a reeling tension standard value when the tension control equipment winds.
In step S2, for the specific step of obtaining the actual value of the unreeling tension, it includes:
the actual rotational speed of the unwind roller 41 is acquired.
The actual value of the unwind tension is calculated from the actual rotational speed of the unwind roller 41: f=60×p/(pi×d×n), where P is the motor output, d is the diameter of the unreeling roller 41, and n is the actual rotational speed of the unreeling roller 41.
In step S2, for a specific step of obtaining the actual value of the middle tension, the method includes:
and acquiring the rotating speed difference of the executing end close to the unreeling position and the executing end close to the reeling position.
Calculating to obtain an actual value of the middle section tension according to the rotation speed difference: f=.
Where S is the cross-sectional area definition of the web, E is the elastic modulus of the web, L is the length of the web at both ends of the first motor 51 and the second motor 52 when not stretched, V1 is the actual rotational speed near the first motor 51, V2 is the actual rotational speed of the second motor 52, T1 is the moment when the web leaves the point a of the first motor 51, T2 is the moment when the web leaves the point a of the first motor 51 and winds around to the point b of the second motor 52, the highest point of the conveying roller 2 on the first motor 51 is defined as the point a, the highest point of the conveying roller 2 on the second motor 52 is defined as the point b, and the radius of the output shaft connected conveying roller 2 of the first motor 51 is the same as the radius of the output shaft connected conveying roller 2 of the second motor 52. The tension on the web according to the hooke's theorem can be expressed as: f=.
It can be seen from the formula that the web tension transferred in the middle is increased when the rotation speed of the first motor 51 is smaller than that of the second motor 52, and the tension is decreased when the rotation speed of the first motor 51 is larger than that of the second motor 52.
In step S2, for the specific step of obtaining the actual value of the unreeling tension, it includes:
the actual torque of the wind-up roller 62 is obtained by a built-in torque sensor.
The actual winding tension value is calculated according to the actual torque of the winding roller 62: f=t/L1, where T is the actual torque of the wind-up roll 62 and L1 is the distance from the axis of the point of action of the tension.
Specifically, in one embodiment, as shown in fig. 7, the step of obtaining the rotation speed difference between the execution end near the unreeling position and the execution end near the reeling position includes:
a1, acquiring the actual rotating speed of an executing end close to the winding position.
A2, presetting the actual rotating speed of the executing end close to the winding position as a standard rotating speed.
A3, acquiring the actual rotating speed of the executing end close to the unreeling position in real time.
A4, comparing the actual rotating speed of the executing end close to the unreeling position with the standard rotating speed, and obtaining the rotating speed difference between the executing end close to the unreeling position and the executing end close to the reeling position: v=v2-V1.
Acquiring the actual rotation speed of the second motor 52, setting the actual rotation speed of the second motor 52 as a standard rotation speed, acquiring the actual rotation speed of the first motor 51 in real time in the coil conveying process, wherein V1 is the actual rotation speed of the first motor 51 and V1, V2 is the actual rotation speed of the second motor 52, and obtaining the rotation speed difference between the first motor 51 and the second motor 52: v=v2-V1. When the rotational speed difference between the first motor 51 and the second motor 52 needs to be changed, the actual rotational speed of the second motor 52 is kept unchanged, and only the actual rotational speed of the first motor 51 is changed.
Specifically, the step of S4 includes:
and C41, inputting the actual value of the unreeling tension into an unreeling tension submodel, outputting an unreeling tension comparison result by the unreeling tension submodel, and generating an unreeling tension adjusting signal according to the unreeling tension comparison result.
Specifically, the step of C41 includes:
and when the unreeling tension sub-model judges that the unreeling tension actual value does not meet the target tension, generating a first unreeling tension adjusting signal. The actual unreeling tension value does not meet the target tension as follows:
when the unreeling tension sub-model judges that the actual value of unreeling tension is smaller than the standard value of unreeling tension, the first unreeling tension adjusting signal is 10.
When the unreeling tension sub-model judges that the actual value of unreeling tension is larger than the standard value of unreeling tension, the first unreeling tension adjusting signal is 11.
And when the unreeling tension sub-model judges that the unreeling tension actual value meets the target tension, generating a second unreeling tension adjusting signal.
And C42, judging whether to generate an unreeling tension control signal according to the unreeling tension adjusting signal.
Specifically, the step of C42 includes:
when the first unwind tension adjustment signal is 10, a first unwind tension control signal is generated.
When the first unwind tension adjustment signal is 11, a second unwind tension control signal is generated.
Inputting the actual value of the unreeling tension into an unreeling tension sub-model to obtain an unreeling tension comparison result and generate an unreeling tension adjusting signal, wherein when the unreeling tension sub-model judges that the actual value of the unreeling tension does not meet the target tension, the first unreeling tension adjusting signal is 1, and when the unreeling tension sub-model judges that the actual value of the unreeling tension meets the target tension, the second unreeling tension adjusting signal is 0. When the unreeling tension adjusting signal is 1, an unreeling tension control signal is generated, and when the unreeling tension adjusting signal is 0, the unreeling tension control signal is not generated. When the unreeling tension sub-model judges that the actual unreeling tension value is smaller than the unreeling tension standard value, namely, the first unreeling tension adjusting signal is 10, a first unreeling tension control signal is generated, and the first unreeling control signal specifically controls the output of the power amplifying plate to be increased. When the unreeling tension sub-model judges that the actual unreeling tension value is larger than the unreeling tension standard value, namely, the first unreeling tension adjusting signal is 11, a second unreeling tension control signal is generated, and the second reeling control signal specifically controls the output of the power amplifying plate to be reduced.
For the middle tension portion, the method comprises the following steps:
And D41, inputting the actual value of the middle section tension into a middle section tension sub-model, outputting a middle section tension comparison result by the middle section tension sub-model, and generating a middle section tension adjustment signal according to the middle section tension comparison result. Specifically, the step of D41 includes:
and when the middle section tension sub-model judges that the actual value of the middle section tension does not meet the target tension, generating a first middle section tension adjusting signal. The actual value of the middle tension does not meet the target tension as follows:
when the middle section tension sub-model judges that the actual value of the middle section tension is smaller than the standard value of the middle section tension, the first middle section tension adjusting signal is 10.
When the middle section tension sub-model judges that the actual value of the middle section tension is larger than the standard value of the middle section tension, the first middle section tension adjusting signal is 11.
And when the middle section tension sub-model judges that the actual value of the middle section tension meets the target tension, generating a second middle section tension adjusting signal.
And D42, judging whether to generate a middle section tension control signal according to the middle section tension adjustment signal.
Specifically, the step of D42 includes:
when the first middle tension adjusting signal is 10, a first middle tension control signal is generated.
And when the first middle tension adjusting signal is 11, generating a second middle tension control signal.
Inputting the actual value of the middle section tension into a middle section tension sub-model to obtain a middle section tension comparison result and generate a middle section tension adjusting signal, wherein when the middle section tension sub-model judges that the actual value of the middle section tension does not meet the target tension, the first middle section tension adjusting signal is 1, and when the middle section tension sub-model judges that the actual value of the middle section tension meets the target tension, the second middle section tension adjusting signal is 0. When the middle section tension adjusting signal is 1, a middle section tension control signal is generated, and when the middle section tension adjusting signal is 0, the middle section tension control signal is not generated. When the middle section tension sub-model judges that the actual value of the middle section tension is smaller than the standard value of the middle section tension, namely, the first middle section tension adjusting signal is 10, a first middle section tension control signal is generated, and the first middle section control signal specifically controls the rotation speed difference between the first motor 51 and the second motor 52 to be reduced. When the middle section tension sub-model judges that the actual value of the middle section tension is larger than the standard value of the middle section tension, namely, the first middle section tension adjusting signal is 11, a second middle section tension control signal is generated, and the second middle section control signal specifically controls the rotation speed difference between the first motor 51 and the second motor 52 to be increased.
For the winding tension portion, the following steps are included:
and E41, inputting the actual winding tension value into a winding tension sub-model, outputting a winding tension comparison result by the winding tension sub-model, and generating a winding tension adjusting signal according to the winding tension comparison result.
Specifically, the step of E41 includes:
and when the winding tension sub-model judges that the actual winding tension value does not meet the target tension, generating a first winding tension adjusting signal. The actual winding tension value does not meet the target tension as follows:
when the rolling tension sub-model judges that the actual rolling tension value is smaller than the rolling tension standard value, the first rolling tension adjusting signal is 10.
When the winding tension sub-model judges that the actual winding tension value is larger than the standard winding tension value, the first winding tension adjusting signal is 11.
And when the winding tension sub-model judges that the actual winding tension value meets the target tension, generating a second winding tension adjusting signal.
And E42, judging whether a winding tension control signal is generated according to the winding tension adjustment signal.
Specifically, the step of E42 includes:
and when the first winding tension adjusting signal is 10, generating a first winding tension control signal.
And when the first winding tension adjusting signal is 11, generating a second winding tension control signal.
And inputting the actual winding tension value into a winding tension sub-model to obtain a winding tension comparison result and generate a winding tension adjusting signal, wherein when the winding tension sub-model judges that the actual winding tension value does not meet the target tension, the first winding tension adjusting signal is 1, and when the winding tension sub-model judges that the actual winding tension value meets the target tension, the second winding tension adjusting signal is 0. When the winding tension adjusting signal is 1, a winding tension control signal is generated, and when the winding tension adjusting signal is 0, the winding tension control signal is not generated. When the rolling tension sub-model judges that the actual rolling tension value is smaller than the rolling tension standard value, namely, the first rolling tension adjusting signal is 10, a first rolling tension control signal is generated, and the first rolling tension control signal specifically controls the torque increase of the servo motor. When the rolling tension sub-model judges that the actual rolling tension value is larger than the rolling tension standard value, namely, the first rolling tension adjusting signal is 11, a second rolling tension control signal is generated, and the second rolling tension control signal specifically controls the torque reduction of the servo motor.
In another embodiment, referring to fig. 8, the step of obtaining the rotation speed difference between the execution end near the unreeling position and the execution end near the reeling position includes:
And B1, acquiring the actual rotating speed of the executing end close to the unreeling position and the actual rotating speed of the executing end close to the reeling position in real time.
B2, comparing the actual rotating speed of the executing end close to the unreeling position with the actual rotating speed of the executing end close to the reeling position, and obtaining the rotating speed difference between the executing end close to the unreeling position and the executing end close to the reeling position: v=v2-V1.
Acquiring the actual rotation speed of the first motor 51 and the actual rotation speed of the second motor 52 in real time in the coil conveying process, wherein V1 is the actual rotation speed of the first motor 51, V2 is the actual rotation speed of the second motor 52, and obtaining the rotation speed difference between the first motor 51 and the second motor 52: v=v2-V1. When it is necessary to change the rotational speed difference between the first motor 51 and the second motor 52, the actual rotational speed of the first motor 51 and the actual rotational speed of the second motor 52 are simultaneously changed.
The application also discloses a controller, which comprises a memory, a processor, a network interface and a database, wherein the memory is electrically connected with the processor, the memory is stored with a computer program which can be loaded by the processor and execute the tension control method based on constant tension and constant linear velocity, the processor is used for running the computer program, and the processor provides calculation and control capability. The memory of the controller 3 includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the controller 3 is used for storing a computer program of a tension control method of constant tension and constant linear velocity. The network interface of the controller 3 is used for communication with an external terminal through a network connection. The computer program, when executed by the processor, implements a constant tension, constant linear velocity tension control method:
S1, establishing a coiled material tension processing model, wherein the coiled material tension processing model comprises an unreeling tension sub-model, a middle section tension sub-model and a reeling tension sub-model;
s2, acquiring a coiled material tension actual value, wherein the coiled material tension actual value comprises an unreeling tension actual value, a middle section tension actual value and a reeling tension actual value;
s3, associating the actual unreeling tension value with the unreeling tension submodel; the actual value of the middle section tension is related to the middle section tension sub-model; the actual winding tension value is related to the winding tension submodel;
s4, inputting the actual value of the coil tension into a coil tension processing model to output a processing result, wherein the processing result comprises an unreeling tension adjusting signal, a middle section tension adjusting signal and a reeling tension adjusting signal;
s5, the processing result is correspondingly sent to the execution end.
The operator can change the computer program according to actual demands so as to adjust the relevant parameters of the tension control method based on constant tension and constant linear speed, wherein the relevant parameters comprise an unreeling tension standard value, a middle tension standard value and a reeling tension standard value, so that the operator can monitor and adjust the tension control state more conveniently.
Those skilled in the art will appreciate that implementing all or part of the above-described methods may be accomplished by way of a computer program, which may be stored on a non-transitory computer readable storage medium and which, when executed, may comprise the steps of the above-described embodiments of the methods. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (9)
1. The tension control method based on constant tension and constant linear velocity is characterized by comprising the following steps:
establishing a coiled material tension processing model, wherein the coiled material tension processing model comprises an unreeling tension sub-model, a middle section tension sub-model and a reeling tension sub-model;
acquiring a coiled material tension actual value, wherein the coiled material tension actual value comprises an unreeling tension actual value, a middle section tension actual value and a reeling tension actual value;
correlating the actual value of the unreeling tension with the unreeling tension submodel; correlating the actual value of the middle section tension with the middle section tension sub-model; correlating the actual winding tension value with the winding tension submodel;
inputting the actual value of the coil tension into the coil tension processing model to output a processing result, wherein the processing result comprises an unreeling tension adjusting signal, a middle section tension adjusting signal and a reeling tension adjusting signal;
and correspondingly transmitting the processing result to an executing end.
2. The constant tension, constant linear velocity based tension control method as recited in claim 1, wherein the step of modeling web tension process comprises:
Collecting tension sample data associated with the web;
preprocessing the tension sample data, carrying out classification marking processing according to a preset classification standard, and establishing a plurality of data sets with labels according to the classification standard; the classification standard is a plurality of different coiled material tension value ranges and a coiled material tension value range which does not reach the standard, and the preprocessing is data precision processing; the data set comprises a test data set, a training data set and a verification data set which are randomly divided in a preset proportion;
building a coiled material tension processing preliminary model, and initializing network parameters and initial learning rate of the coiled material tension processing preliminary model; model training is carried out on the coiled material tension processing preliminary model through the training data set and the verification data set, and parameters are updated; and stopping training after the web tension processing preliminary model converges, and outputting the web tension processing preliminary model at the moment as a web tension processing model.
3. A constant tension, constant linear velocity based tension control method as recited in claim 2, wherein said step of inputting said actual web tension value into said web tension process model to output a process result comprises:
Inputting the actual value of the middle section tension into a middle section tension sub-model, outputting a middle section tension comparison result by the middle section tension sub-model, and generating a middle section tension adjustment signal according to the middle section tension comparison result;
and judging whether to generate a middle section tension control signal according to the middle section tension adjusting signal.
4. The tension control method based on constant tension and constant linear velocity according to claim 1, wherein: the step of obtaining the actual value of the coiled material tension comprises the following steps:
acquiring a rotating speed difference of an executing end close to the unreeling position and an executing end close to the reeling position;
calculating to obtain an actual value of the middle section tension according to the rotation speed difference: f=, where S is the cross-sectional area definition of the coil, E is the modulus of elasticity of the coil, L is the coil length at both ends of the execution end near the unwind and the execution end near the wind when not stretched, V1 is the actual rotational speed of the execution end near the unwind, V2 is the actual rotational speed of the execution end near the wind, T1 is the moment when the coil leaves the execution end near the unwind, and T2 is the moment when the coil leaves the execution end near the wind from the coil near the execution end near the unwind.
5. The tension control method based on constant tension and constant linear velocity according to claim 4, wherein: the step of obtaining the rotation speed difference between the execution end close to the unreeling position and the execution end close to the reeling position comprises the following steps:
Acquiring the actual rotating speed of an executing end close to a winding position;
presetting the actual rotating speed of an executing end close to a winding position as a standard rotating speed;
the actual rotation speed of the execution end close to the unreeling position is obtained in real time,
comparing the actual rotating speed of the executing end close to the unreeling position with the standard rotating speed, and obtaining the rotating speed difference of the executing end close to the unreeling position and the executing end close to the reeling position.
6. The tension control method based on constant tension and constant linear velocity according to claim 4, wherein: the step of obtaining the rotation speed difference between the execution end close to the unreeling position and the execution end close to the reeling position comprises the following steps:
acquiring the actual rotating speed of the executing end close to the unreeling position and the actual rotating speed of the executing end close to the reeling position in real time;
comparing the actual rotating speed of the executing end close to the unreeling position with the actual rotating speed of the executing end close to the reeling position, and obtaining the rotating speed difference between the executing end close to the unreeling position and the executing end close to the reeling position: v=v2-V1, V1 being the actual rotational speed of the end of the run near the unwind and V2 being the actual rotational speed of the end of the run near the wind-up.
7. A constant tension, constant linear velocity based tension control method as recited in claim 3, wherein: the step of comparing according to the actual value of the middle section tension and the standard value of the middle section tension to obtain a comparison result of the middle section tension comprises the following steps:
When the actual tension value of the middle section is inconsistent with the standard tension value of the middle section, a first middle section tension comparison result is generated;
and when the actual tension value of the middle section is consistent with the standard tension value of the middle section, generating a second middle section tension comparison result.
8. A controller, characterized by: comprising a memory and a processor, said memory being electrically connected to said processor, said memory having stored thereon a computer program capable of being loaded by the processor and executing the constant tension, constant linear velocity based tension control method according to any of claims 1-7, said processor being adapted to run said computer program.
9. Coiled material conveyor based on constant tension, constant linear velocity, its characterized in that: comprises a frame (1), a controller (3), an unreeling tension control component (4), a speed difference closed-loop tension control component (5) and a reeling tension control component (6) are arranged on the frame (1), the controller (3) is used for executing the computer program according to claim 8, the unreeling tension control component (4), the speed difference closed-loop tension control component (5) and the reeling tension control component (6) are sequentially arranged in the horizontal direction, the unreeling tension control component (4) comprises an unreeling roller (41) and an unreeling shaft tension detection roller (42), the unreeling roller (41) and the unreeling shaft tension detection roller (42) are rotationally supported on the frame (1) and are electrically connected with the controller (3), the speed difference closed-loop tension control component (5) comprises a power source executing end and a middle section tension detection roller (53), the power source executing end is provided with two, the middle section tension detection roller (53) is rotationally supported between the two power source executing ends, the two power source executing ends and the middle section tension detection roller (53) are electrically connected with the reeling tension detection roller (61) and the reeling tension detection roller (6), the winding shaft tension detection roller (61) and the winding roller (62) are rotatably supported on the frame (1) and are electrically connected with the controller (3).
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| CN202311758703.6A CN117566503A (en) | 2023-12-19 | 2023-12-19 | Tension control method, device and controller based on constant tension and constant linear velocity |
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| CN202311758703.6A CN117566503A (en) | 2023-12-19 | 2023-12-19 | Tension control method, device and controller based on constant tension and constant linear velocity |
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