CN111606097A - Constant tension control method and system based on winding machine - Google Patents
Constant tension control method and system based on winding machine Download PDFInfo
- Publication number
- CN111606097A CN111606097A CN202010323579.0A CN202010323579A CN111606097A CN 111606097 A CN111606097 A CN 111606097A CN 202010323579 A CN202010323579 A CN 202010323579A CN 111606097 A CN111606097 A CN 111606097A
- Authority
- CN
- China
- Prior art keywords
- acceleration
- tension
- material belt
- stage
- compensation force
- 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.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/08—Web-winding mechanisms
- B65H18/10—Mechanisms in which power is applied to web-roll spindle
-
- 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
- B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H26/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms
- B65H26/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs
- B65H26/04—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs for variation in tension
Landscapes
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
Abstract
The invention discloses a constant tension control method and system based on a winding machine, wherein under the normal working condition of the winding machine, the tension fluctuation of a material belt and the acceleration of the material belt have a certain relation, and according to different stages of the acceleration of the material belt, smoothly-changed tension compensation force is applied to the tension of the material belt, so that the tension of the material belt can be constant under the action of the tension compensation force.
Description
Technical Field
The invention relates to the technical field of winding machines, in particular to a constant tension control method and system based on a winding machine.
Background
The winding machine is a key device for producing products such as lithium batteries, capacitors, textile materials and the like, wherein core performance indexes of the winding machine are linear speed and tension fluctuation of a material belt, the linear speed influences the working efficiency of the winding machine, and the tension fluctuation influences the performance of the products produced by the winding machine, so that the control of the tension fluctuation of the material belt during high-speed winding is a key technology of the winding machine.
When the winder realizes the winding of the material belt, firstly, the static friction force FA of each roller needs to be overcome, and in addition, the dynamic tension FB exists when the material belt is accelerated to wind, so the tension when the material belt is accelerated to wind is as follows: and Fs is FA + FB, the tension at constant speed is Fs, and the tension at deceleration is Fs-FA. From the above analysis, it can be known that, under the condition of not performing tension compensation, the tension of the material belt is different when the material belt is accelerated, decelerated and uniform in winding, so that the tension of the material belt fluctuates greatly, and the performance of the winding machine for producing products is affected.
Disclosure of Invention
The invention mainly solves the technical problem of how to avoid the tension fluctuation of a material belt of a winding machine.
According to a first aspect, there is provided in one embodiment a method of constant tension control based on a winder comprising:
acquiring the acceleration of a material belt in a winding machine;
and determining the tension compensation force of the material belt according to the acceleration of the material belt, smoothing the tension compensation force, and applying the tension compensation force subjected to smoothing treatment to the material belt according to the increasing direction of the tension of the material belt so as to control the tension of the material belt to be constant.
Further, determining the tension compensation force of the strip of material based on the acceleration of the strip of material comprises:
the acceleration of the material belt is divided into the following stages:
(1) the acceleration of the material belt is positive and the absolute value is increased;
(2) the acceleration of the material belt is in a positive and constant stage;
(3) the acceleration of the material belt is positive and the absolute value is reduced;
(4) the acceleration of the material belt is 0 stage;
(5) the acceleration of the material belt is negative and the absolute value is increased;
(6) the acceleration of the material belt is in a negative and constant stage;
(7) the acceleration of the material belt is negative and the absolute value is reduced;
and determining the tension compensation force of the material belt corresponding to each stage according to the stage of the acceleration of the material belt.
Further, determining the tension compensation force of the material belt corresponding to each stage according to the stage of the acceleration of the material belt comprises:
(1) tension compensation force at the stage of acceleration of the material belt being positive and absolute value increasing
Wherein, TAPresetting tension T for acceleration stage of material beltSPresetting tension T for the material belt at the uniform speed stageBPresetting tension for a tape deceleration stage, wherein t0 is the starting time of a winder, t1 is the ending time of the tape in a stage that the acceleration is positive and the absolute value is increased, t is the current time, and t is more than or equal to t0 and less than t 1;
(2) tension compensation force T when acceleration of the material belt is in a positive and constant stage2＝TA；
(3) Tension compensation force when acceleration of the material belt is positive and absolute value is reduced
Wherein t2 is the end time of the constant stage when the acceleration of the tape is positive, t3 is the end time of the decreasing stage when the acceleration of the tape is positive and the absolute value is reduced, t is the current time, and t is t3, t is more than or equal to t 2;
(4) when the acceleration of the material belt is in 0 stage, the tension compensation force T4＝TS；
(5) Tension compensation force at the stage of acceleration of the material belt being negative and absolute value increasing
Wherein t4 is the end time of the acceleration of the tape at 0 stage, t5 is the end time of the acceleration of the tape at negative and absolute value increasing stage, t is the current time, and t is more than or equal to t4 and less than t 5;
(6) tension compensation force T when acceleration of the material belt is in a negative and constant stage6＝TB；
(7) Tension compensation force in the stage of acceleration of the material belt being negative and absolute value decreasing
Wherein t6 is the end time of the constant stage when the acceleration of the tape is negative, t7 is the end time of the decreasing stage when the acceleration of the tape is negative, t is the current time, and t is t7, t is more than or equal to t 6.
Further, the applying the smoothed tension compensation force to the material strip includes:
and applying a tension compensation force after the smoothing treatment to the material belt through a tension compensation device.
Further, the tension compensation device is a voice coil motor.
According to a second aspect, there is provided in one embodiment a winder-based constant tension control system comprising:
the unwinding device is used for conveying the material belt;
the winding device is used for winding the material belt conveyed by the unwinding device;
the roll group is arranged between the unwinding device and the winding device and used for conveying the material belt from the unwinding device to the winding device;
the controller is used for determining the tension compensation force of the material belt according to the acceleration of the material belt and smoothing the tension compensation force;
and the tension compensation device is connected with the roller group and used for applying tension compensation force to the roller group, and the direction of the tension compensation force is the direction for increasing the tension of the material belt.
Further, the controller is configured to determine, according to different acceleration stages of the material tape, a tension compensation force of the material tape corresponding to each stage, and includes:
(1) when the acceleration of the material belt is positive and the absolute value is increased, the tension compensation force determined by the controller is
Wherein, TAPresetting tension T for acceleration stage of material beltSPresetting tension T for the material belt at the uniform speed stageBTension is preset for the deceleration stage of the strip, t0 is the starting time of the winder, t1The end time of the strip in the acceleration positive and absolute value increasing stage is shown, t is the current time, and t is more than or equal to t0 and less than t 1;
(2) when the acceleration of the material belt is in a positive and constant stage, the tension compensation force determined by the controller is T2＝TA；
(3) When the acceleration of the material belt is positive and the absolute value is reduced, the tension compensation force determined by the controller is
Wherein t2 is the end time of the constant stage when the acceleration of the tape is positive, t3 is the end time of the decreasing stage when the acceleration of the tape is positive and the absolute value is reduced, t is the current time, and t is t3, t is more than or equal to t 2;
(4) when the acceleration of the material belt is in a 0 stage, the tension compensation force determined by the controller is T4＝TS；
(5) When the acceleration of the material belt is negative and the absolute value is increased, the tension compensation force determined by the controller is
Wherein t4 is the end time of the acceleration of the tape at 0 stage, t5 is the end time of the acceleration of the tape at negative and absolute value increasing stage, t is the current time, and t is more than or equal to t4 and less than t 5;
(6) when the acceleration of the material belt is in a negative and constant stage, the tension compensation force determined by the controller is T6＝TB；
(7) When the acceleration of the material belt is negative and the absolute value is reduced, the tension compensation force determined by the controller is
Wherein t6 is the end time of the constant stage when the acceleration of the tape is negative, t7 is the end time of the decreasing stage when the acceleration of the tape is negative, t is the current time, and t is t7, t is more than or equal to t 6.
Further, the roller group comprises a fixed roller and a floating roller, the tension compensation device is connected with the floating roller, and when the tension compensation device applies tension compensation force to the floating roller, the floating roller moves towards the direction of increasing the tension of the material belt.
Furthermore, the tension compensation device is a voice coil motor, and a motor shaft of the voice coil motor is connected with the floating roller.
Further, the device also comprises a tension sensor arranged on the fixed roller and used for measuring the tension of the material belt.
According to the constant tension control method and system based on the winding machine in the embodiment, because the tension fluctuation of the material belt of the winding machine has a certain relation with the acceleration of the material belt under the normal working condition, the tension compensation force with smooth change is applied to the tension of the material belt according to different stages of the acceleration of the material belt, so that the tension of the material belt can be constant under the action of the tension compensation force.
Drawings
FIG. 1 is a schematic view of a winder according to an embodiment;
FIG. 2 is a schematic diagram of a constant tension control system of a winder according to an embodiment;
FIG. 3 is a schematic diagram of a tension curve of the strip material before and after compensation according to an embodiment;
FIG. 4 is a schematic illustration of a compensating tension curve according to one embodiment;
FIG. 5 is a flow chart of a constant tension control method of a winder according to an embodiment;
fig. 6 is a specific flowchart of acquiring the acceleration of the material tape according to an embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
The winding machine includes an unwinding device 20, a winding device 30 and a roller 40, please refer to fig. 1, fig. 1 is a schematic structural diagram of the winding machine of an embodiment, the unwinding device 20 is wound with a material strip 10, in an embodiment, the unwinding device 20 has a shape similar to a cylinder, the material strip 10 is wound on an outer wall of the cylinder, an unwinding driving component (not shown) is further disposed on a central axis of the unwinding device 20, the unwinding driving component is used for driving the unwinding device 20 to rotate in an unwinding direction (a right direction in fig. 1) to convey the material strip 10 wound thereon to the winding device 30, the winding device 30 has the same shape as the unwinding device 20 and is used for winding the material strip 10 on the outer wall thereof, a winding driving component (not shown) is also disposed on the central axis of the winding device 30, the winding driving component is used for driving the winding device 30 to rotate in a winding direction (the right direction in fig. 1) to wind the material strip 10, wherein, unreel the driver part and the rolling driver part and all include servo motor (not shown), speed reducer (not shown), encoder (not shown), servo motor, the axis of speed reducer and unwinding device/coiling mechanism connects gradually, the encoder is installed and is used for detecting centraxonial slew velocity in epaxial, can convert it into the transmission line speed of unwinding device/coiling mechanism material loading area 10, cross roller fixed mounting on the fixing base, as shown in fig. 1, the distance may be far away between unwinding device and the coiling mechanism, in order to guarantee the tension constancy of material area, still need set up a plurality of roller of crossing between unwinding device and the coiling mechanism and convey the material area, so that the material area can keep the state of tightening in data send, and tension can not take place too big change.
The winding machine can keep the material belt not to generate tension fluctuation in a large range in the winding process, or the tension fluctuation is not obvious when the winding speed is low, however, the tension fluctuation of the material belt becomes obvious due to the friction force of the roller and the influence of the dynamic tension of the material belt when the material belt is wound at a high speed, the material wound on the battery cell in the battery needs to be wound at a high speed, the requirement on the tension fluctuation is very high, and otherwise, the performance of the battery can be influenced.
Therefore, the embodiment of the present invention takes a winding machine of a battery cell as an example, and a constant tension control system based on the winding machine of the battery cell is described in detail.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a constant tension control system of a winding machine according to an embodiment, including a material tape 11, an unwinding device 21, a winding device 31, a roller set 41, a controller 51, a tension compensation device 61, and a tension sensor 71.
The tape 11 in this embodiment is a tape wound on the battery cells, the tape 11 is conveyed from the unwinding device 21 to the winding device 31 through a plurality of rollers 41 according to a tape conveying direction (a right direction in fig. 2) shown in fig. 2, the tape 11 needs to be wound on the battery cells with uniform pressure, and the battery cells are disposed on the winding device 31 during winding.
The unwinding device 21 is used for conveying the material tape 11, the shape of the unwinding device 21 in this embodiment may be a cylinder, or the rest may be wound around the material tape 11, a central shaft is disposed at the center of the unwinding device 21, the central shaft may drive the unwinding device 21 to rotate together, as shown in fig. 2, when the central shaft rotates counterclockwise, the material tape 11 wound around the unwinding device 21 is output from the unwinding device 21 counterclockwise as shown, an unwinding driving component is disposed on the central shaft, in an embodiment, the unwinding driving component includes a servo motor, a speed reducer and an encoder, wherein the servo motor and the speed reducer are sequentially connected to the central shaft, the encoder is disposed on the central shaft and is used for detecting the rotation speed of the central shaft, the rotation speed of the central shaft is converted into the linear speed of the unwinding device 21, and the linear speed of the material tape.
The winding device 31 is used for winding the material belt conveyed by the unwinding device 21, the battery cell in this embodiment is arranged on the winding device 31, the battery cell can be fixed on the central shaft of the winding device 31 by means of a fixing member or the like, and the central shaft of the winding device 31 can drive the battery cell to rotate together when rotating, as shown in fig. 2, if the central shaft of the winding device 31 rotates counterclockwise, the battery cell also rotates counterclockwise, the material tape 11 can be wound on the battery cell at this time, the same as the driving component of the unwinding device 21, the driving component is also arranged on the central shaft of the winding device 31, and comprises a servo motor, a speed reducer and a coder, the servo motor and the speed reducer are sequentially connected with the middle shaft, and the encoder is arranged on the middle shaft and used for detecting the rotating speed of the middle shaft and converting the rotating speed of the middle shaft into the rotating linear speed of the winding device 31, so that the linear speed of the material belt 11 during winding can be obtained. Under the normal working condition of the winding machine, the unwinding device 21 and the winding device 31 are theoretically required to have the same rotation linear speed, but due to the influence of performance difference of driving components such as servo motors and the like, the rotation linear speeds of the unwinding device 21 and the winding device 31 are different, and the tension of the material belt 11 is also fluctuated in the transmission process. In addition, the unwinding device 21 and the winding device 31 are often located at a relatively long distance from each other at the work station, so that a plurality of rollers at preset positions are required for conveying to ensure that the material tape 11 is in a tensioned state.
The roller set 41 is disposed between the unwinding device 21 and the winding device 31, and is used for transferring the material tape from the unwinding device 21 to the winding device 31. Fig. 2 shows an embodiment of the arrangement position of the over-roller set 41 in the battery cell winder, which can ensure that the tension balance is maintained when the material tape 11 is conveyed through the over-roller 41. The feed roller 41 of the conventional winder is usually a fixed feed roller, and although the tension of the material belt can be kept constant to some extent, the tension constant requirement cannot be met by the battery electric core winder which has high-speed winding and high tension fluctuation requirement. Therefore, the fixed feed roller 412 and the floating feed roller 411 are included in the feed roller group 41 of the present embodiment, and the fixed feed roller 412 is fixed to the fixed base and cannot be moved in position, as in the case of the feed roller of the conventional winding machine. The floating roller 411 is movably mounted on the fixing base, and can generate a certain displacement by applying an external force, in an embodiment, the floating roller 411 can be disposed on the fixing base through a guide rail, and the floating roller 411 can move back and forth or left and right on the guide rail, as shown in fig. 2, when the floating roller 412 moves towards the right side, the material belt 11 can be tightened on the roller group, that is, the tension of the material belt 11 is increased, in this embodiment, a certain tension compensation force can be applied to the floating roller 412 according to the condition that the tension on the material belt 11 fluctuates, so that the tension on the material belt 11 can be constant.
In the above-mentioned application of the tension compensation force to the floating roller 412, if the tension compensation force is applied by a manual mechanical method, the precision is poor, and the reaction is slow when the tape is wound at a high speed, and real-time compensation cannot be realized, therefore, the embodiment of the present invention further provides the controller 51 and the tension compensation device 61, which convert the tension compensation force to be compensated at this time by the tape 11 after the controller performs logic operation into a compensation signal and output the compensation signal to the tension compensation device 61, and the tension compensation device 61 applies the tension compensation force to the floating roller 411 according to the compensation signal output by the controller 51, so as to compensate the tension of the tape 11 in real time.
The controller 51 is configured to determine the tension compensation force of the tape 11 at different time periods according to the acceleration of the tape 11, and perform a smoothing process on the tension compensation force, such as cosine smoothing and the like. The acceleration of the tape 11 can be detected by an existing acceleration detecting device, such as an acceleration detector, or can be obtained by detecting the linear velocity of the tape 11 and converting the linear velocity into the acceleration. As shown in fig. 3, a curve a in fig. 3 is a tension of the material tape 11 before compensation, a curve B is a linear velocity variation trend of the material tape 11, and it can be seen from analyzing the variation trends of the curves a and B that the variation trend of the tension before compensation and the variation trend of the linear velocity present a certain rule, in order for the winding machine to achieve high-speed winding rapidly, the linear velocity of the material tape 11 presents a variable acceleration stage in which the acceleration increases gradually, a uniform acceleration stage, a variable acceleration stage in which the acceleration decreases gradually, and a constant velocity stage in which the acceleration is 0, the winding machine reaches a high-speed winding working state in the constant velocity stage, when a battery cell finishes winding rapidly, the winding machine needs to transition from high-speed winding to a stop state, and at this time, the linear velocity of the material tape 11 presents a constant velocity stage, a variable deceleration stage in which the acceleration increases negatively, a, the constant speed stage from the start to the high speed state and the constant speed stage from the high speed to the stop state may be combined into one stage, and therefore the controller in this embodiment is configured to determine the tension compensation force of the material tape corresponding to each stage according to different acceleration stages of the material tape, and includes:
(1) when the acceleration of the material belt is positive and the absolute value is increased, the tension compensation force determined by the controller is
TAPresetting tension T for acceleration stage of material beltSPresetting tension T for the material belt at the uniform speed stageBPresetting tension for a tape deceleration stage, wherein t0 is the starting moment of the winder, namely the starting moment of the tape acceleration stage which is positive and the absolute value of the tape increases, t1 is the ending moment of the tape acceleration stage which is positive and the absolute value of the tape increases, t is the current moment, and t is more than or equal to t0 and less than t 1; as shown in FIG. 4, the tension compensation force T1 at this stage is the compensation force for the time period T0-T1.
Wherein, the tension compensation force of the material belt is also related to the static friction force of the material belt, and the static friction force of the material belt can influence the preset tension T of the material belt in the acceleration stageAIn this embodiment, the strip acceleration stage is preset with a tension TAPreset tension T at uniform speed stage of material beltSPresetting tension T in deceleration stage of material beltBThe pre-applied tension of the material belt in the stages of acceleration, uniform speed and deceleration can be obtained by inquiring in a parameter manual of a winding machine or can be measured through a plurality of tests.
(2) When the acceleration of the material belt is positive and constant, the tension compensation force determined by the controller is T2＝TA(ii) a As shown in FIG. 4, the tension compensation force T2 at this stage is the compensation force for the time period T1-T2.
(3) When the acceleration of the material belt is positive and the absolute value is reduced, the tension compensation force determined by the controller is
Wherein t2 is the end time of the constant stage when the acceleration of the tape is positive, t3 is the end time of the decreasing stage when the acceleration of the tape is positive and the absolute value is reduced, t is the current time, and t is t3, t is more than or equal to t 2; as shown in FIG. 4, the tension compensation force T3 at this stage is the compensation force for the time period T2-T3.
(4) When the acceleration of the material belt is 0, the tension compensation force determined by the controller is T4＝TS(ii) a As shown in FIG. 4, the tension compensation force T4 at this stage is the compensation force for the time period T3-T4.
(5) When the acceleration of the material belt is negative and increased, the tension compensation force determined by the controller is
Wherein t4 is the end time of the acceleration of the tape at 0 stage, t5 is the end time of the acceleration of the tape at negative and absolute value increasing stage, t is the current time, and t is more than or equal to t4 and less than t 5; as shown in FIG. 4, the tension compensation force T5 at this stage is the compensation force for the time period T4-T5.
(6) When the acceleration of the material belt is negative and constant, the tension compensation force determined by the controller is T6＝TB(ii) a As shown in FIG. 4, the tension compensation force T6 at this stage is the compensation force for the time period T5-T6.
(7) When the acceleration of the material belt is negative and the absolute value is reduced, the tension compensation force determined by the controller is
Wherein t6 is the end time of the constant stage when the acceleration of the tape is negative, t7 is the end time of the decreasing stage when the acceleration of the tape is negative, t is the current time, and t is t7, t is more than or equal to t 6.
The controller 51 determines the tension compensation force according to the seven acceleration stages of the material belt, converts the tension compensation force into a control signal and outputs the control signal to the tension compensation device 61, and the tension compensation device 61 applies the corresponding tension compensation force to the floating roller 411 according to the control signal. The curve C shown in fig. 3 is a tension compensation force curve corresponding to each stage.
The tension compensation device 61 is connected to the floating roller for applying a tension compensation force determined by the controller to the floating roller to pull the floating roller a predetermined distance, which in turn pulls the strip of material 11 a predetermined distance to increase the tension of the strip of material. Since the winder of the battery cell usually works in a high-speed winding environment, the response time of the tension compensation device 61 needs to be as short as possible, the present embodiment adopts the voice coil motor to provide the output of the tension compensation force, which performs real-time tension compensation according to different stages of acceleration, wherein the motor shaft of the voice coil motor is connected to the floating roller 411, the motor shaft of the voice coil motor can reciprocate, the tension compensation force is applied to the floating roller through the motion displacement of the motor shaft of the voice coil motor to compensate the tension of the material belt 11, so as to achieve the tension constancy of the material belt 11 in the winder, and as shown in a curve D of fig. 3, which is a tension curve of the winder after compensation, it can be seen that the tension fluctuation of the winder is very small through the control of the constant tension control system of the.
In this embodiment, the tension sensor 71 is further disposed on the fixed roller, and is configured to measure the tension of the tape 11, in order to ensure the accuracy of the detected tension, the tension sensor 71 is disposed behind the floating roller according to the conveying direction of the tape 11, that is, the tension sensor 71 is disposed behind the tension compensation device 61, the tape 11 is subjected to tension compensation by the tension compensation device 61, and then the tension is detected, in a more preferred embodiment, the tension sensor 71 is further disposed at a position closer to the winding device 31, so that it can be ensured that the tension of the tape 11 wound on the battery cell in the winding device 31 is constant.
Based on the constant tension control system based on the winding machine provided in the above embodiment, the present embodiment further provides a control method applicable to the constant tension control system, please refer to fig. 5, which includes the following steps:
s10, acquiring the acceleration of the material belt in the winding machine; in this embodiment, the encoder arranged on the central shaft of the winding device 31 is used to obtain the rotation speed of the central shaft of the winding device 31, and then the linear speed of the winding device 31 is obtained through conversion, and the linear speed of the winding device 31 is used as the linear speed of the material tape 11, and after the linear speed is converted, the acceleration of the material tape 11 can be obtained. As shown in fig. 6, the method specifically includes the following steps:
s101, under the condition that a tension compensation device is not started, a floating roller is fixed at a preset initial position, meanwhile, an unreeling device 21 and a reeling device 31 are started to enable a material belt 11 to be converted into a high-speed reeling state from a static state, after the speed of the material belt 11 is constant, the acceleration of the reeling device 31 is converted, and the variation trend of the acceleration when the linear speed is from 0 to a constant speed is obtained, namely the starting and stopping time when the acceleration is increased in the positive direction, the starting and stopping time when the acceleration is constant and the starting and stopping time when the acceleration is decreased in the positive direction.
And S102, winding the tape 11 at a constant speed at a high speed, and recording the starting and stopping time of the tape 11 running at the constant speed.
S103, braking the unwinding device 21 and the winding device 31, and recording a change trend of the strip 11 from a constant speed to a speed of 0, namely starting and stopping time when the acceleration is increased in a negative direction, starting and stopping time when the acceleration is constant, and starting and stopping time when the acceleration is decreased in a negative direction.
In summary, the start-stop time of seven stages of the acceleration of the tape 11 can be obtained.
S20, determining the tension compensation force of the tape at different time stages according to the acceleration of the tape 11, smoothing the tension compensation force, and applying the tension compensation force to the direction of increasing the tension of the tape so that the tension of the tape in the winding machine is constant.
The present embodiment determines the tension compensation force in each stage according to the seven stages of the acceleration of the tape 11, and the detailed implementation of how to determine the tension compensation force and how to compensate according to the seven stages has been described in detail in the above embodiments, and will not be described herein again.
According to the constant tension control method in the embodiment of the invention, for a high-speed winding machine, the tension fluctuation of the material belt is less than +/-5% at the linear speed of the material belt in the winding machine of 2m/S, so that the performance requirements of products such as battery cores and the like are met.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (10)
1. A constant tension control method based on a winding machine is characterized by comprising the following steps:
acquiring the acceleration of a material belt in a winding machine;
and determining the tension compensation force of the material belt according to the acceleration of the material belt, smoothing the tension compensation force, and applying the tension compensation force subjected to smoothing treatment to the material belt according to the increasing direction of the tension of the material belt so as to control the tension of the material belt to be constant.
2. The method of claim 1, wherein determining the tension-compensating force of the strip of material based on the acceleration of the strip of material comprises:
the acceleration of the material belt is divided into the following stages:
(1) the acceleration of the material belt is positive and the absolute value is increased;
(2) the acceleration of the material belt is in a positive and constant stage;
(3) the acceleration of the material belt is positive and the absolute value is reduced;
(4) the acceleration of the material belt is 0 stage;
(5) the acceleration of the material belt is negative and the absolute value is increased;
(6) the acceleration of the material belt is in a negative and constant stage;
(7) the acceleration of the material belt is negative and the absolute value is reduced;
and determining the tension compensation force of the material belt corresponding to each stage according to the stage of the acceleration of the material belt.
3. The method of claim 2, wherein determining the tension compensation force for the strip of material for each phase based on the phase at which the acceleration of the strip of material is present comprises:
(1) tension compensation force at the stage of acceleration of the material belt being positive and absolute value increasing
Wherein, TAPresetting tension T for acceleration stage of material beltSPresetting tension T for the material belt at the uniform speed stageBPresetting tension for a tape deceleration stage, wherein t0 is the starting time of a winder, t1 is the ending time of the tape in a stage that the acceleration is positive and the absolute value is increased, t is the current time, and t is more than or equal to t0 and less than t 1;
(2) tension compensation force T when acceleration of the material belt is in a positive and constant stage2＝TA；
(3) Tension compensation force when acceleration of the material belt is positive and absolute value is reduced
Wherein t2 is the end time of the constant stage when the acceleration of the tape is positive, t3 is the end time of the decreasing stage when the acceleration of the tape is positive and the absolute value is reduced, t is the current time, and t is t3, t is more than or equal to t 2;
(4) when the acceleration of the material belt is in 0 stage, the tension compensation force T4＝TS；
(5) Tension compensation force at the stage of acceleration of the material belt being negative and absolute value increasing
Wherein t4 is the end time of the acceleration of the tape at 0 stage, t5 is the end time of the acceleration of the tape at negative and absolute value increasing stage, t is the current time, and t is more than or equal to t4 and less than t 5;
(6) tension compensation force T when acceleration of the material belt is in a negative and constant stage6＝TB；
(7) Tension compensation force in the stage of acceleration of the material belt being negative and absolute value decreasing
Wherein t6 is the end time of the constant stage when the acceleration of the tape is negative, t7 is the end time of the decreasing stage when the acceleration of the tape is negative, t is the current time, and t is t7, t is more than or equal to t 6.
4. The method of claim 1, wherein said applying a smoothed tension compensation force to the strip of material comprises:
and applying a tension compensation force after the smoothing treatment to the material belt through a tension compensation device.
5. The method of claim 4, wherein the tension compensation device is a voice coil motor.
6. A constant tension control system based on a winder, comprising:
the unwinding device is used for conveying the material belt;
the winding device is used for winding the material belt conveyed by the unwinding device;
the roll group is arranged between the unwinding device and the winding device and used for conveying the material belt from the unwinding device to the winding device;
the controller is used for determining the tension compensation force of the material belt according to the acceleration of the material belt and smoothing the tension compensation force;
and the tension compensation device is connected with the roller group and used for applying the tension compensation force after the smoothing treatment to the roller group, and the direction of the tension compensation force is the direction for increasing the tension of the material belt.
7. The system of claim 6, wherein the controller is configured to determine the tension compensation force for the strip of material for each of the stages based on the acceleration stage of the strip of material, comprising:
(1) when the acceleration of the material belt is positive and the absolute value is increased, the tension compensation force determined by the controller is
Wherein, TAPresetting tension T for acceleration stage of material beltSPresetting tension T for the material belt at the uniform speed stageBPresetting tension for a tape deceleration stage, wherein t0 is the starting time of a winder, t1 is the ending time of the tape in a stage that the acceleration is positive and the absolute value is increased, t is the current time, and t is more than or equal to t0 and less than t 1;
(2) when the acceleration of the material belt is in a positive and constant stage, the tension compensation force determined by the controller is T2＝TA；
(3) When the acceleration of the material belt is positive and the absolute value is reduced, the tension compensation force determined by the controller is
Wherein t2 is the end time of the constant stage when the acceleration of the tape is positive, t3 is the end time of the decreasing stage when the acceleration of the tape is positive and the absolute value is reduced, t is the current time, and t is t3, t is more than or equal to t 2;
(4) when the acceleration of the material belt is in a 0 stage, the tension compensation force determined by the controller is T4＝TS；
(5) When the acceleration of the material belt is negative and the absolute value is increased, the tension compensation force determined by the controller is
Wherein t4 is the end time of the acceleration of the tape at 0 stage, t5 is the end time of the acceleration of the tape at negative and absolute value increasing stage, t is the current time, and t is more than or equal to t4 and less than t 5;
(6) when the acceleration of the material belt is in a negative and constant stage, the tension compensation force determined by the controller is T6＝TB；
(7) When the acceleration of the material belt is negative and the absolute value is reduced, the tension compensation force determined by the controller is
Wherein t6 is the end time of the constant acceleration phase of the tape, and t7 is the end time of the decreasing absolute value phase of the acceleration phase of the tapeT is the current time, t is more than or equal to t6 and less than t 7.
8. The system of claim 6, wherein the set of rollers includes a fixed roller and a floating roller, the tension compensation device is coupled to the floating roller, and the floating roller moves in a direction of increasing tension in the web of material when the tension compensation device applies the tension compensation force to the floating roller.
9. The system of claim 8, wherein the tension compensating device is a voice coil motor having a motor shaft coupled to the floating feed roller.
10. The system of claim 6, further comprising a tension sensor disposed on the fixed roller for measuring the tension of the strip of material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010323579.0A CN111606097A (en) | 2020-04-22 | 2020-04-22 | Constant tension control method and system based on winding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010323579.0A CN111606097A (en) | 2020-04-22 | 2020-04-22 | Constant tension control method and system based on winding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111606097A true CN111606097A (en) | 2020-09-01 |
Family
ID=72195924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010323579.0A Withdrawn CN111606097A (en) | 2020-04-22 | 2020-04-22 | Constant tension control method and system based on winding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111606097A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112249777A (en) * | 2020-10-21 | 2021-01-22 | 华中科技大学 | Constant tension control device and control method |
| CN112591526A (en) * | 2020-11-24 | 2021-04-02 | 浙江熔聚装备科技有限公司 | Non-woven fabric collection method, control device and non-woven fabric manufacturing equipment |
| CN114212591A (en) * | 2021-12-14 | 2022-03-22 | 沈阳工业大学 | Constant-tension integrated deviation rectifying mechanism for amorphous and silicon steel winding machine and control method |
-
2020
- 2020-04-22 CN CN202010323579.0A patent/CN111606097A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112249777A (en) * | 2020-10-21 | 2021-01-22 | 华中科技大学 | Constant tension control device and control method |
| CN112591526A (en) * | 2020-11-24 | 2021-04-02 | 浙江熔聚装备科技有限公司 | Non-woven fabric collection method, control device and non-woven fabric manufacturing equipment |
| CN112591526B (en) * | 2020-11-24 | 2023-03-10 | 浙江熔聚装备科技有限公司 | Non-woven fabric collection method, control device and non-woven fabric manufacturing equipment |
| CN114212591A (en) * | 2021-12-14 | 2022-03-22 | 沈阳工业大学 | Constant-tension integrated deviation rectifying mechanism for amorphous and silicon steel winding machine and control method |
| CN114212591B (en) * | 2021-12-14 | 2024-03-01 | 沈阳工业大学 | Constant-tension integrated deviation correcting mechanism for amorphous and silicon steel winding machine and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111606097A (en) | Constant tension control method and system based on winding machine | |
| CN102360930B (en) | Transformer coil winding tension automatic control system | |
| CN209378389U (en) | A kind of strength building system | |
| US4496112A (en) | Method of controlling a web winding process | |
| US4775086A (en) | Take-out/take-up tension control apparatus | |
| CN112919216B (en) | Film dividing and cutting machine tension adjusting method based on discrete PID and taper tension control | |
| WO1991016255A1 (en) | Automatic web-joining system | |
| CN109534045A (en) | A kind of coil diameter calculation method and winding/unwinding device based on rotary inertia | |
| US8970140B2 (en) | Apparatus for controlling speed in induction motor | |
| CN103043471A (en) | Tipping paper rewinding machine on basis of servo system | |
| CN1906104A (en) | Real-time determination of web tension and control using position sensors | |
| CN110759154A (en) | Constant tension control system | |
| CN114014069B (en) | Film tension control system and method | |
| CN210339771U (en) | Unreeling and deviation rectifying integrated mechanism | |
| CN117303075A (en) | Battery cell winding machine, winding method and storage medium | |
| CN109665352B (en) | Tension control method and control device of unreeling system | |
| JP5149818B2 (en) | Long media winding control device | |
| CN201390028Y (en) | Aluminum scrap film winding device used for automatic hot stamping machine | |
| CN211895302U (en) | Constant tension winding device and coiled material processing equipment | |
| JPH1160004A (en) | Take-up device | |
| JPS60198425A (en) | Device for measuring and controlling take-up torque | |
| CN217996171U (en) | Aluminum foil winding machine | |
| CN115215244B (en) | Rope arrangement device | |
| CN214827970U (en) | Sealing strip winding device | |
| US3973174A (en) | Digital control system |
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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200901 |
|
| WW01 | Invention patent application withdrawn after publication |