Coating machine automatic roll changing device, control method thereof and storage medium

Abstract

The application relates to the technical field of battery coating, and discloses a coating machine automatic roll changing device, a control method thereof and a storage medium. The control method comprises the following steps: controlling a first roll shaft to switch to a standby position and a second roll shaft to switch to a working position, controlling a pressing roller to run to a pressing working position and a cutting knife to run to a cutting working position, and controlling the second roll shaft to rotate at the same linear speed as the first roll shaft; real-time detection is carried out on an inductive label on the first roll in a rotating state, so that the real-time rotating distance / time of the inductive label is detected from the moment when the inductive label is detected for the first time; when the rotating distance / time is equal to a target rotating distance / time, the pressing roller is controlled to start to extend, and the cutting knife is controlled to start to extend after a set delay cutting time. The embodiment of the application realizes automatic roll changing operation of the coating machine under a non-stop state, and can control the tail length by fine adjustment of the delay cutting time parameter of the cutting knife, so that the controllability and accuracy are high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery coating, in particular to a coating machine automatic roll changing device, a control method thereof and a storage medium. BACKGROUND

[0002] In the current roll changing technology of the coating machine, if the active shaft is changed to the standby shaft, the equipment usually needs to be stopped first, and a series of operations need to be performed manually at the turret, including the rotation of the turret and manual tape connection. This method not only requires more personnel and is more complicated to operate, resulting in high personnel and material investment and high production cost, but also has a long tail length and poor controllability. SUMMARY

[0003] The present application relates to the technical field of battery coating, in particular to a coating machine automatic roll changing device, a control method thereof and a storage medium.

[0004] To achieve this purpose, the present application adopts the following technical solutions:

[0005] A coating machine automatic roll changing device, comprising: a rotating mechanism, a label detection mechanism and a cutting mechanism;

[0006] The rotating mechanism comprises a rotatable turret, a first spool for mounting a first roll, a second spool for mounting a second roll, and a driving mechanism for driving the second spool to rotate; the first spool and the second spool are symmetrically arranged on the turret about the rotation axis of the turret;

[0007] In the working state, the first spool is in the working position, and the second spool is in the standby position; the turret is used to rotate to switch the first spool to the standby position and the second spool to the working position when the roll changing process is started; the driving mechanism is used to control the second spool to rotate in the same direction at the same linear speed as the first spool after the roll changing process is started; the outer end of the second roll is provided with a position-aligned adhesive and an induction label;

[0008] The label detection mechanism is provided at a predetermined label detection position and is used to detect the induction label on the first roll in the rotating state in real time;

[0009] The cutting mechanism comprises: a base, a swing arm hinged to the base, a pressure roller and a cutter fixed at adjacent positions on the swing arm, and a controller;

[0010] The controller is used to control the swing arm to rotate until the pressure roller runs to a predetermined pressing working position and the cutter runs to a predetermined cutting working position when the roll changing process is started;

[0011] The controller is further configured to determine a target rotation distance / time, detect a real-time rotation distance / time of the adhesive label from a time point at which the label detection mechanism first detects the sensing label, and control the pressure roller to start to extend until the two layers of foil on the first reel and the second reel in the pressing working position are pressed together when the real-time rotation distance / time is equal to the target rotation distance / time, and control the cutter to start to extend to cut the foil of the first reel after a set delay cutting time.

[0012] The target rotation distance / time is equal to a total rotation distance / time minus the first rotation distance / time and the second rotation distance / time, the total rotation distance / time is a rotation distance / time of the adhesive label from a corresponding position of the label detection position to a corresponding position of the pressing working position, the first rotation distance / time is a rotation distance / time of the adhesive label in a pressure roller extension stroke time, the first rotation time is the pressure roller extension stroke time, the second rotation distance / time is a rotation distance / time of the adhesive label in a pressure roller advance pressing time, and the second rotation time is the pressure roller advance pressing time.

[0013] Optionally, a time required for the adhesive label to rotate one round is recorded as a single round time, and a distance walked by the adhesive label in one round is recorded as a single round distance, and the single round distance / time is equal to the first shortest distance / time plus the second shortest distance / time.

[0014] A position corresponding to the label detection position on the circumference of the second reel is recorded as a first position, and a position corresponding to the pressing working position on the circumference of the second reel is recorded as a second position; the shortest circumferential distance / time from the first position to the second position in the rotation direction of the second rotation shaft is recorded as a first shortest distance / time, and the shortest circumferential distance / time from the second position to the first position in the rotation direction of the second rotation shaft is recorded as a second shortest distance / time.

[0015] The controller is specifically configured to:

[0016] If the sum of the first rotation distance / time and the second rotation distance / time is not less than the first shortest distance / time, the total rotation distance / time is equal to the single round distance / time*M plus the first shortest distance / time, and M is a natural number greater than or equal to 1.

[0017] If the sum of the first rotation distance / time and the second rotation distance / time is less than the first shortest distance / time, the total rotation distance / time is equal to the first shortest distance / time.

[0018] Optionally, the controller detects the real-time rotation distance / time of the adhesive label according to an output shaft working pulse of the driving mechanism.

[0019] Optionally, the second rotating shaft and the first rotating shaft are unwinding shafts, the rotating direction is counterclockwise, and the first minimum distance is 3 / 4 of the circumference length.

[0020] Optionally, the second rotating shaft and the first rotating shaft are winding shafts, the rotating direction is clockwise, and the first minimum distance is 1 / 4 of the circumference length.

[0021] Optionally, the sensing label is a color label.

[0022] A control method of the automatic roll changing device of the coating machine described above, the control method comprising:

[0023] After the roll changing process is started, the turret is controlled to rotate so that the first winding shaft is switched to a standby position and the second winding shaft is switched to a working position, the pressure roller is controlled to run to a preset pressing working position, the cutting knife is controlled to run to a preset cutting working position, and the second winding shaft is controlled to rotate at the same linear speed as the first winding shaft and in the same direction;

[0024] The sensing label on the first winding drum in the rotating state is detected in real time, and the real-time rotating distance / time of the label detection position to the pressing working position is detected from the time when the sensing label is first detected. When the real-time rotating distance / time is equal to the target rotating distance / time, the pressure roller is controlled to start to extend until the two layers of foil on the first winding drum and the second winding drum in the pressing working position are pressed together, and the cutting knife is controlled to start to extend after a set delay cutting time to cut off the foil on the first winding drum;

[0025] wherein the target rotating distance / time = total rotating distance / time - first rotating distance / time - second rotating distance / time, the total rotating distance / time is the rotating distance / time of the label detection position to the pressing working position, the first rotating distance is the rotating distance of the label detection position in the pressure roller extension stroke time, the first rotating time is the pressure roller extension stroke time, the second rotating distance is the rotating distance of the label detection position in the pressure roller advance pressing time, and the second rotating time is the pressure roller advance pressing time.

[0026] Optionally, the time required for the label detection position to rotate one round is recorded as a single round time, and the distance traveled by the label detection position in one round is recorded as a single round distance, and the single round distance / time = first minimum distance / time + second minimum distance / time.

[0027] The position corresponding to the label detection position on the circumference of the second winding drum is recorded as a first position, and the position corresponding to the pressing working position on the circumference of the second winding drum is recorded as a second position. The minimum circumference distance / time from the first position to the second position in the rotating direction of the second rotating shaft is recorded as a first minimum distance / time, and the minimum circumference distance / time from the second position to the first position in the rotating direction of the second rotating shaft is recorded as a second minimum distance / time.

[0028] The determination method of the total rotation distance / time comprises:

[0029] If the sum of the first rotation distance / time and the second rotation distance / time is not less than the first shortest distance / time, the total rotation distance / time is equal to the single cycle distance / time*M+the first shortest distance / time, wherein M is a natural number greater than or equal to 1;

[0030] If the sum of the first rotation distance / time and the second rotation distance / time is less than the first shortest distance / time, the total rotation distance / time is equal to the first shortest distance / time.

[0031] Optionally, in the control method, the real-time rotation distance / time of the rubberizing is detected according to the working pulse of the output shaft of the driving mechanism.

[0032] A storage medium, wherein at least one instruction is stored in the storage medium, the instruction is loaded and executed by a processor to implement the operation performed by the control method of the automatic roll changing device of the coating machine according to any one of the above.

[0033] Compared with the prior art, the present application has the following beneficial effects:

[0034] On the one hand, the automatic roll changing operation of the coating machine is completed under the non-stop state by the automatic control of the turret mechanism and the cutting mechanism, so that the rapid roll changing of the base material of the coating machine and the continuous production of the equipment are met; on the other hand, in the tape connecting operation, the press roller is controlled to be extended and the cutter is controlled to be extended after the preset delay cutting time before the rubberizing operation reaches the corresponding position of the pressing working position, so that the working personnel can not only accurately control the extension of the press roller at different target moments according to the working parameters (i.e. the extension stroke time of the press roller) of different types of press rollers to ensure that the press roller has been extended and has continuously pressed the foil for a preset time (i.e. the press roller advance pressing time) when the rubberizing operation reaches the pressing working position, but also can control the tail length by fine-tuning the delay cutting time parameter of the cutter, which has high controllability and accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0036] Figure 1A structure schematic diagram of the automatic roll changing device of the coating machine provided by the embodiment of the present application is provided.

[0037] Figure 2 A control method flow chart provided by the embodiment of the present application is provided.

[0038] Figure 3 A winding and receiving schematic diagram provided by the embodiment of the present application is provided.

[0039] Explanation of reference numerals:

[0040] 1 represents a first spool, 2 represents a second spool, 3 represents an absolute value encoder, 4 represents a compression roller, 5 represents a cutter, 6 represents a swing arm, 7 represents a tape running during roll changing, and 8 represents a tape running during production. DETAILED DESCRIPTION

[0041] In order to make the inventive purposes, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] The embodiment of the present application provides a coating machine automatic roll changing device and a control method thereof, which not only realizes automatic roll changing of the coating machine, simplifies roll changing operation, improves roll changing efficiency, and reduces roll changing cost, but also can accurately control tail length according to working parameters of the compression roller 4 and the cutter 5.

[0043] Embodiment one

[0044] Please refer to Figure 1 The coating machine automatic roll changing device provided by the embodiment of the present application comprises a rotating mechanism, a label detection mechanism and a cutting mechanism.

[0045] The rotating mechanism comprises a rotatable turret, a first spool 1 for mounting a first roll, a second spool 2 for mounting a second roll, and a driving mechanism for driving the second spool 2 to rotate; the first spool 1 and the second spool 2 are symmetrically arranged on the turret about the rotation shaft of the turret;

[0046] In the working state, the first spool 1 is in the working position, and the second spool 2 is in the standby position; the turret is used to rotate to switch the first spool 1 to the standby position and the second spool 2 to the working position when the roll changing process is started; the driving mechanism is used to control the second spool 2 to rotate in the same direction at the same linear speed as the first spool 1 after the roll changing process is started; the outer end of the second roll is provided with a position-aligned adhesive and an induction label;

[0047] The label detection mechanism is arranged at a preset label detection position and is used for real-time detection of the inductive label on the first winding drum in a rotating state.

[0048] The cutting mechanism comprises a base, a swing arm 6 hinged to the base, a compression roller 4 and a cutter 5 fixed at adjacent positions on the swing arm 6, and a controller.

[0049] The controller is used to control the swing arm 6 to rotate until the compression roller 4 runs to a preset compression working position and the cutter 5 runs to a preset cutting working position when the winding changing process is started.

[0050] The controller is further used to determine a target rotating distance / time, to start detecting the real-time rotating distance / time of the adhesive from the moment when the label detection mechanism first detects the inductive label, and to control the compression roller 4 to start extending until the two layers of foils on the first winding drum and the second winding drum in the compression working position are compressed when the real-time rotating distance / time is equal to the target rotating distance / time, and to control the cutter 5 to start extending after a set delay cutting time to cut off the foil of the first winding drum. The delay cutting time refers to a preset time for delaying the extension of the cutter 5 after a reference time point.

[0051] D 目标 = D 总 -D 伸出行程 -D 提前压制 ; D 总 is a total rotating distance, which refers to the rotating distance of the adhesive from the corresponding position of the label detection position to the corresponding position of the compression working position; D 伸出行程 is a first rotating distance, which refers to the rotating distance of the adhesive within the compression roller extension stroke time; D 提前压制 is a second rotating distance, which refers to the rotating distance of the adhesive within the compression roller advance compression time.

[0052] T 目标 = T 总 -T 伸出行程 -T 提前压制 ; T 总 is a total rotating time, which refers to the rotating time of the adhesive from the corresponding position of the label detection position to the corresponding position of the compression working position; T 伸出行程 is a first rotating time, which refers to the compression roller extension stroke time, i.e., the time required for the compression roller 4 to switch from the original retracted state to the fully extended state; T 提前压制 is a second rotating time, which refers to the compression roller advance compression time, i.e., a preset continuous time required for the foil to be compressed in advance before the cutting operation is performed.

[0053] The automatic roll changing device of the coating machine provided by the embodiment of the present application controls the turret mechanism, the label detection mechanism and the cutting mechanism through the controller to realize the changing of the first roll shaft 1 and the second roll shaft 2 without stopping the coating machine. During the roll changing process, the controller first controls the turret to rotate to exchange the positions of the first roll shaft 1 in use and the second roll shaft 2 not in use, and then controls the swing arm 6 to rotate until the pressure roller 4 runs to the preset pressing working position and the cutting knife 5 runs to the preset cutting working position after the turret stops rotating. Then, the real-time rotating distance / time of the adhesive label is detected from the moment when the label detection mechanism detects the induction label for the first time, and when the real-time rotating distance / time is equal to the target rotating distance / time, the pressure roller 4 is controlled to start extending until the two layers of foil on the first roll and the second roll in the pressing working position are pressed together, and the cutting knife 5 is controlled to start extending after a preset delay cutting time to cut the foil of the first roll, thereby completing the tape splicing operation.

[0054] On the one hand, the automatic control of the turret mechanism and the cutting mechanism realizes the automatic roll changing operation of the coating machine without stopping the coating machine, and meets the quick roll changing of the base material of the coating machine and the continuous production of the equipment. On the other hand, in the tape splicing operation of the device, the pressure roller 4 is controlled to extend and the cutting knife 5 is controlled to extend after a preset delay cutting time before the adhesive label runs to the corresponding position of the pressing working position by a certain time (i.e. the sum of the pressure roller extension stroke time and the pressure roller advance pressing time), so that the worker can not only accurately control the extension of the pressure roller 4 at different target moments according to the working parameters (i.e. the pressure roller extension stroke time) of different types of pressure rollers 4 to ensure that the pressure roller 4 has been extended and has continuously pressed the foil for a preset time length (i.e. the pressure roller advance pressing time) when the adhesive label runs to the pressing working position, but also can control the tail length by fine-tuning the delay cutting time parameter of the cutting knife 5, which has high controllability and accuracy.

[0055] For the convenience of description, the position corresponding to the label detection position on the circumference of the second roll is denoted as the first position S1, and the position corresponding to the pressing working position on the circumference of the second roll is denoted as the second position S2; the distance walked by the label in one rotation is denoted as the single rotation distance C 单周 , C 单周 = C1+C2; the time required for one rotation of the label is denoted as the single rotation time T C , T C =T C1 +TC2 .

[0056] Wherein, C1 is the first shortest distance, which refers to the shortest circumferential distance from the first position S1 to the second position S2 along the rotation direction of the second rotation shaft; C2 is the second shortest distance, which refers to the shortest circumferential distance from the second position S2 to the first position S1 along the rotation direction of the second rotation shaft.

[0057] T C1 is the first shortest time length, which refers to the shortest time length from the first position S1 to the second position S2 along the rotation direction of the second rotation shaft; T C2 is the second shortest time length, which refers to the shortest time length from the second position S2 to the first position S1 along the rotation direction of the second rotation shaft.

[0058] The controller, in determining the total rotation distance D 总 / time T 总 , is specifically used for:

[0059] If D 伸出行程 + D 提前压制 ≥ C1, or T 伸出行程 + T 提前压制 ≥ T C1 , then the total rotation distance D 总 = C 单周 *M+C1, and the total rotation time T 总 = T C *M+T C1 , where M is a natural number greater than or equal to 1; at this time, since the rotation speed of the second rotation shaft 2 is fast, it is necessary to rotate at least one circle before pressing and cutting can be performed;

[0060] If D 伸出行程 + D 提前压制 <C1, or T 伸出行程 + T 提前压制 <T C1 , then the total rotation distance D 总 = C1, and the total rotation time T 总 = T C1 ; at this time, since the rotation speed of the second rotation shaft 2 is slow, pressing and cutting can be performed within the first circle.

[0061] In actual application, since the rotation distance / time of the rubberizing is controlled by the driving mechanism for driving the second rotation shaft where the rubberizing is located, in the embodiment of the application, the controller can specifically detect the real-time rotation distance / time of the rubberizing according to the working pulse of the output shaft of the driving mechanism.

[0062] In an alternative embodiment, the second rotating shaft and the first rotating shaft are unwinding shafts, the rotating direction is counterclockwise, and the first shortest distance is 3 / 4 of the circumference. The second rotating shaft and the first rotating shaft are winding shafts, the rotating direction is clockwise, and the first shortest distance is 1 / 4 of the circumference. The sensing label is a color label.

[0063] Embodiment two

[0064] Referring to Figure 2 , the embodiment of the present application provides a control method suitable for the automatic roll changing device of the coating machine, which specifically comprises the following steps:

[0065] In step 101, after the roll changing process is started, the rotating tower is controlled to rotate so that the first roll shaft 1 is switched to the standby position, the second roll shaft 2 is switched to the working position, the pressure roller 4 is controlled to run to the preset pressing working position, the cutting knife 5 is controlled to run to the preset cutting working position, and the second roll shaft 2 is controlled to rotate at the same linear speed as the first roll shaft 1.

[0066] In this step, the rotating angle of the rotating tower can be recognized by the absolute value encoder 3 arranged at the center of the rotating shaft of the rotating tower.

[0067] First, taking Figure 1 as an example, the absolute value encoder 3 and the rotating tower are linked by a screw rod, so that the output change of the absolute value encoder 3 is synchronized with the rotation of the rotating tower. Taking the absolute value encoder 3 with the numerical value 8192 as an example, it has 14 lines of IO points connected to the IO module, and the read IO signal is converted into the actual numerical value of the absolute value encoder 3 by program calculation, which is defined as the rotating angle of the rotating tower. It is defined that, in the horizontal state of the rotating tower, when the unwinding A shaft (i.e., the first roll shaft 1) is at the inner side (i.e., the working position), the rotating angle of the rotating tower is rotating tower A position, and when the unwinding B shaft (i.e., the second roll shaft 2) is at the inner side (i.e., the standby position), the rotating angle of the rotating tower is rotating tower B position. Generally, rotating tower A position is fixed at 2048, and rotating tower B position is fixed at 6144.

[0068] A global variable W150 with the data type of WORD is established in the PLC, the address of %W150 is assigned to W150, and 14 global variables W150.0 (0-13) with the data type of BOOL are established. The addresses of %W150.00-W150.13 are assigned to W150.0 (0-13) in sequence. Taking the OMRON IO module ID5342 as an example, the lines of the absolute value encoder 3 are connected to the IO module according to the connection requirements, and the global variables I0.0 (0-13) are newly established and assigned to the IO module (the corresponding points are I0.0=A1, I0.1=B1, I0.2=A2, I0.3=B2, …). The IO signal output by the absolute value encoder 3 is collected, and the real-time numerical value of the absolute value encoder 3 can be obtained through binary conversion.

[0069] PLC calculates absolute value encoder 3 real-time numerical value mode:

[0070] W150.13: = 0 XOR I0.13; (XOR logical operation XOR)

[0071] W150.12: = W150.13 XOR I0.12;

[0072] W150.11: = W150.12 XOR I0.11;

[0073] W150.10: = W150.11 XOR I0.10;

[0074] W150.9: = W150.10 XOR I0.9;

[0075] W150.8: = W150.9 XOR I0.8;

[0076] W150.7: = W150.8 XOR I0.7;

[0077] W150.6: = W150.7 XOR I0.6;

[0078] W150.5: = W150.6 XOR I0.5;

[0079] W150.4: = W150.5 XOR I0.4;

[0080] W150.3: = W150.4 XOR I0.3;

[0081] W150.2: = W150.3 XOR I0.2;

[0082] W150.1: = W150.2 XOR I0.1;

[0083] W150.0: = W150.1 XOR I0.0;

[0084] W150: = 150 AND 16#1FFF (AND logical operation AND)

[0085] Absolute value encoder 3 real-time numerical value: = WORD_TO_INT(W150); WORD_TO_INT indicates converting bit column to integer.

[0086] In the production process, the reel of the unwinding A shaft is always unwinding the material, and when the reel diameter is less than a certain value, a new reel needs to be replaced. The reel changing process is started by pressing the reel changing start button on the unwinding turret device. After the reel changing process is started, the turret starts to rotate at a set speed, and the real-time angle of the turret changes with the turret action. In this process, the float roller between the unwinding A shaft and the main roller is kept tensioned by PID adjustment, and when the turret angle changes from turret A position to turret B position, it stops. At this time, through PLC program logic judgment, the swing arm 6 of the cutting mechanism starts to rise until the pressure roller 4 runs to the preset pressing working position and the cutter 5 runs to the preset cutting working position. During the rising process of the swing arm 6, whether it has risen to the preset pressing working position can be identified through the sensing signal of the opposite light fiber installed on the pressure roller 4.

[0087] Step 102, real-time detection is performed on the sensing label on the first reel in a rotating state, and the real-time rotating distance / time of the adhesive is detected from the moment when the sensing label is first detected. When the real-time rotating distance / time is equal to the target rotating distance / time, the pressure roller 4 starts to extend until the two layers of foil on the first reel and the second reel in the pressing working position are pressed together, and the cutter 5 starts to extend after a set delay cutting time to cut off the foil running to the cutting working position of the first reel.

[0088] Wherein, the target rotating distance / time = total rotating distance / time - first rotating distance / time - second rotating distance / time, the total rotating distance / time is the rotating distance / time when the adhesive rotates from the corresponding position of the label detection position to the corresponding position of the pressing working position, the first rotating distance is the rotating distance of the adhesive in the pressure roller extension stroke time, the first rotating time is the pressure roller extension stroke time, the second rotating distance is the rotating distance of the adhesive in the pressure roller advance pressing time, and the second rotating time is the pressure roller advance pressing time.

[0089] It can be understood that, since the rotating distance / time of the adhesive is controlled by the driving mechanism for driving the second shaft on which the adhesive is located, the working pulse of the output shaft of the driving mechanism can accurately reflect the real-time rotating distance / time of the adhesive, and the working pulse of the output shaft of the driving mechanism can be used as the basis for controlling the start of the pressure roller 4 and the cutter 5 in the control method of the embodiment of the application. The specific implementation logic is as follows:

[0090] Specifically, according to the shaft parameter setting, the shaft conversion unit is degree, the shaft stroke distance is 360 degrees, and the ratio of the speed reducer is 10, so that the output shaft of the driving mechanism in the case of one revolution of the second winding drum is working pulse Pulse_1 = 360 * 10 = 3600. The second winding drum is aligned with the adhesive and the sensing color mark, and the color mark follows the rotation of the second winding shaft 2. The label sensor senses the first color mark signal and starts timing. The second winding shaft 2 rotates one revolution, and the timing ends. The time is recorded as TIME_1.

[0091] TIME_1 is processed into working pulse Pulse_2 through a program.

[0092] PLC program calculation:

[0093] Pulse_2: = LINT_TO_LREAL(TimeToNanoSec(TIME_1)) / 1000000;

[0094] (LINT_TO_LREAL is 64-bit integer to 64-bit real, TimeToNanoSec is time conversion to nanosecond, nanosecond is 64-bit integer)

[0095] The current value of the output feedback position of the second rotating shaft is continuously increased, and is recorded as Pulse_3.

[0096] Compression roller 4 travel time: there are two magnetic sensors on the cylinder that pushes the compression roller 4 out, which senses the signal of the compression roller 4 extending and retracting. During the extension of the compression roller 4, the retraction signal disappears and the extension signal appears, and the timing starts and ends. This time is Compression Roller Distance Of Travel Time, abbreviated as CRDOTT.

[0097] Compression roller 4 lead time: the compression roller 4 needs to be pressed in advance to ensure that the standby shaft adhesive is adhered to the base material during transmission, so the compression roller 4 needs to be pressed in advance to make the standby shaft closely adhere to the base material. This advance time does not include the compression roller 4 travel time, and is Compression Roller Lead Time, abbreviated as CRLT.

[0098] Winding calculation formula:

[0099] When CRDOTT is less than three-quarters of TIME_1, the calculation action pulse is

[0100] Pulse_4 = ((Pulse_2 * 0.75 - (CRDOTT + CRLT)) / Pulse_2) * Pulse_1 + Pulse_3;

[0101] When CRDOTT is greater than three-quarters of TIME_1, the action pulse is calculated as follows:

[0102] Pulse_4=((Pulse_2*1.75-(CRDOTT+CRLT)) / Pulse_2)*Pulse_1+Pulse_3;

[0103] Rewinding calculation formula:

[0104] Pulse_4=((Pulse_2*2.25-(CRDOTT+CRLT)) / Pulse_2)*Pulse_1+Pulse_3;

[0105] It's important to note that the purpose of Pulse2 here is to calculate the proportion of the adhesive application position on the roll when the pressure roller starts moving. Pulse2 is the value converted from the time it takes for the color mark to complete one revolution. Multiplying this by 0.75 and subtracting (CRDOTT + CRLT) gives the time it takes for the adhesive to move from detection position S1 to S3. Dividing the result by Pulse2 yields a coefficient. Multiplying this coefficient by Pulse1 and adding it to Pulse3 gives the total target position. The color mark detection time is used here because the time it takes for rolls of different diameters to complete one revolution at a predetermined linear speed is not equal. The resulting coefficient will be adjusted according to the roll diameter. Pulse1, on the other hand, is the pulse value when a roll of a certain diameter rotates at a predetermined linear speed, and is used as a reference value.

[0106] When the current value of the output feedback position of the second reel 2 is greater than or equal to Pulse_4, the pressure roller 4 is controlled to start extending, and the cutter 5 is controlled to start extending after the set delay cutting time.

[0107] The following describes the specific implementation process using the second and first rotating shafts as unwinding shafts, the rotation direction as counterclockwise, and the first shortest distance as 3 / 4 of the circumference as an example.

[0108] like Figure 3 The diagram shows the unwinding and splicing of the tape. S1 represents the position of the second roll in the circumferential direction corresponding to the label detection position, also known as the pressing position of pressure roller 4; S2 represents the position of the second roll in the circumferential direction corresponding to the pressing working position; S6 represents the position of the second roll in the circumferential direction corresponding to the cutting working position; the arc length between S3 and S4 represents the first rotation distance D. 伸出行程 The distance of adhesive application during the extension stroke of the pressure roller is indicated by the arc length between S4 and S2, representing the second rotation distance D. 提前压制, which is the rotating distance of the label in the pre-pressing time of the press roller; the arc length between S6 and S2 represents the circular arc distance between the position corresponding to the cutting working position and the position corresponding to the pressing working position in the circumferential direction of the second roller; thus, it can be seen that the arc length between S6 and S5 represents the tail length, i.e., the arc length between S6 and S2 in the rotating direction + the arc length between S2 and S5 in the rotating direction - the glue length, wherein the arc length between S2 and S5 in the rotating direction = the rotating distance of the label in the preset time difference (the delay cutting time + the cutter extension stroke time - the press roller pre-pressing time - the press roller extension stroke time).

[0109] According to the above control method, when the label rotates to the S1 position for the first time, the label sensor detects the sensing color mark at the same position of the label, and the tape splicing program is started, i.e., the rotating position of the label is detected with the current time as the initial time; when the label rotates to the S3 position for the first time, the control of the press roller 4 starts to extend, and the countdown of the delay cutting time is started at the same time, so that the cutter 5 can start to extend after the set delay cutting time; when the label rotates to the S4 position for the first time, the press roller 4 has completely extended, and the two layers of foils of the first roller and the second roller are pressed to be attached to each other, so as to prepare for the subsequent cutting; when the label rotates to the S5 position for the first time, the cutter 5 at the position corresponding to S6 (i.e., the cutting working position) has completely extended, and the cutting operation is performed on the foil (i.e., the old foil) of the first roller, and thus the tape splicing process is completed.

[0110] Thus, in the control method, the actual tail length is the arc length between S6 and S5, i.e., the arc length between S6 and S2 in the rotating direction + the arc length between S2 and S5 in the rotating direction - the glue length, wherein the arc length between S2 and S5 in the rotating direction = the rotating distance of the label in the preset time difference (the delay cutting time + the cutter extension stroke time - the press roller pre-pressing time - the press roller extension stroke time), which can be ignored when the cutter extension stroke time is relatively small. Since the arc length between S6 and S2 is determined by the fixed assembly position of the press roller 4 and the cutter 5, the tail length can be flexibly designed according to the accurate press roller pre-pressing time, the press roller extension stroke time and the delay cutting time in the actual working process.

[0111] In other embodiments, the rotating direction of the second roller 2 can be the clockwise direction, and the relative distance between S1 and S2 can be adjusted arbitrarily to meet different application scenarios. However, regardless of which way is adopted, the same control principle can be adopted to achieve accurate tail length control.

[0112] Those skilled in the art can understand that all or part of the steps in the above coating machine rapid threading control method can be completed by instructions, or by instructions controlling related hardware, which can be stored in a computer readable storage medium and loaded and executed by a processor.

[0113] For this purpose, the embodiment of the present application further provides a storage medium, in which a plurality of instructions are stored, which can be loaded by a processor to execute the steps in the control method of the coating machine automatic roll changing device provided by the embodiment of the present application.

[0114] The storage medium can include a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0115] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the foregoing embodiments of the present application have been described in detail, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An automatic roll changing device for a coating machine, characterized in that, The automatic roll changing device comprises a rotating mechanism, a label detecting mechanism and a cutting mechanism. The rotating mechanism comprises a rotatable turret, a first spool for mounting a first roll, a second spool for mounting a second roll, and a driving mechanism for driving the second spool to rotate; the first spool and the second spool are symmetrically arranged on the turret about the rotation axis of the turret; In the working state, the first spool is in the working position and the second spool is in the standby position; the turret is used to rotate to switch the first spool to the standby position and the second spool to the working position when the roll changing process is started; the driving mechanism is used to control the second spool to rotate at the same linear speed as the first spool in the same direction after the roll changing process is started; the outer end of the second roll is provided with a position-aligned adhesive label and an inductive label; The label detecting mechanism is arranged at a preset label detecting position and is used to detect the inductive label on the first roll in real time in the rotating state; The cutting mechanism comprises a base, a swing arm hinged to the base, a pressure roller and a cutter fixed at adjacent positions on the swing arm, and a controller; The controller is used to control the swing arm to rotate until the pressure roller runs to the preset pressing working position and the cutter runs to the preset cutting working position when the roll changing process is started; The controller is also used to determine a target rotating distance / time, to detect the real-time rotating distance / time of the adhesive label starting from the moment when the label detecting mechanism first detects the inductive label, and to control the pressure roller to start to extend until the two layers of foil on the first roll and the second roll in the pressing working position are pressed together when the real-time rotating distance / time is equal to the target rotating distance / time, and to control the cutter to start to extend after a set delay cutting time to cut off the foil of the first roll; wherein the target rotating distance / time = total rotating distance / time - first rotating distance / time - second rotating distance / time, the total rotating distance / time is the rotating distance / time of the adhesive label from the corresponding position of the label detecting position to the corresponding position of the pressing working position, the first rotating distance is the rotating distance of the adhesive label within the pressure roller extension stroke time, the first rotating time is the pressure roller extension stroke time, the second rotating distance is the rotating distance of the adhesive label within the pressure roller advance pressing time, and the second rotating time is the pressure roller advance pressing time.

2. The automatic roll changing device of the coating machine according to claim 1, wherein the time required for the label to rotate one round is recorded as a single round time length, and the distance traveled by the label when rotating one round is recorded as a single round distance; the single round distance / time = first shortest distance / time + second shortest distance / time; the position corresponding to the label detecting position on the circumference of the second roll is recorded as the first position, and the position corresponding to the pressing working position on the circumference of the second roll is recorded as the second position; the shortest circumferential distance / time from the first position to the second position in the rotating direction of the second rotation axis is recorded as the first shortest distance / time, and the shortest circumferential distance / time from the second position to the first position in the rotating direction of the second rotation axis is recorded as the second shortest distance / time. ​ ​ The controller is specifically used for determining the total rotation distance / time, and is specifically used for: If the sum of the first rotation distance / time and the second rotation distance / time is not less than the first shortest distance / time, the total rotation distance / time is equal to the single-turn distance / time*M+the first shortest distance / time, and M is a natural number greater than or equal to 1; If the sum of the first rotation distance / time and the second rotation distance / time is less than the first shortest distance / time, the total rotation distance / time is equal to the first shortest distance / time.

3. The coating machine automatic roll changing device according to claim 1, wherein The controller detects the real-time rotation distance / time of the adhesive according to the working pulse of the output shaft of the driving mechanism.

4. The coating machine automatic roll changing device according to claim 2, wherein The second rotating shaft and the first rotating shaft are unwinding shafts, the rotating direction is counterclockwise, and the first shortest distance is 3 / 4 of the circumference length.

5. The coating machine automatic roll changing device according to claim 2, wherein The second rotating shaft and the first rotating shaft are winding shafts, the rotating direction is clockwise, and the first shortest distance is 1 / 4 of the circumference length.

6. The coater automatic roll change apparatus according to claim 1, wherein The sensing label is a color label.

7. A control method for the automatic roll changer of an applicator as claimed in claim 1, characterized in that, The control method comprises: After the roll changing process is started, the turret is controlled to rotate so that the first winding shaft is switched to a standby position, the second winding shaft is switched to a working position, the pressure roller is controlled to run to a preset pressing working position, the cutting knife is controlled to run to a preset cutting working position, and the second winding shaft is controlled to rotate at the same linear speed as the first winding shaft and in the same direction; The real-time rotation distance / time of the adhesive is detected in real time according to the sensing label on the first winding drum in the rotating state, and the real-time rotation distance / time of the adhesive is detected from the moment when the sensing label is first detected; when the real-time rotation distance / time is equal to the target rotation distance / time, the pressure roller is controlled to start to extend until the two layers of foil on the first winding drum and the second winding drum in the pressing working position are pressed together, and the cutting knife is controlled to start to extend after a set delay cutting time to cut the foil of the first winding drum; The target rotation distance / time is equal to the total rotation distance / time-the first rotation distance / time-the second rotation distance / time, the total rotation distance / time is the rotation distance / time when the adhesive rotates from the position corresponding to the label detection position to the position corresponding to the pressing working position, the first rotation distance is the rotation distance of the adhesive in the pressure roller extension stroke time, the first rotation time is the pressure roller extension stroke time, the second rotation distance is the rotation distance of the adhesive in the pressure roller advance pressing time, and the second rotation time is the pressure roller advance pressing time.

8. The control method of the automatic roll changing device of the coating machine according to claim 7, wherein The time required for the label to rotate one turn is recorded as the single-turn time, and the distance traveled by the label when rotating one turn is recorded as the single-turn distance, and the single-turn distance / time is equal to the first shortest distance / time+the second shortest distance / time; The position corresponding to the label detection position on the circumference of the second winding drum is recorded as the first position, and the position corresponding to the pressing working position on the circumference of the second winding drum is recorded as the second position; the shortest circumference distance / time from the first position to the second position in the rotating direction of the second rotating shaft is recorded as the first shortest distance / time, and the shortest circumference distance / time from the second position to the first position in the rotating direction of the second rotating shaft is recorded as the second shortest distance / time. The total rotation distance / time determination method comprises: If the sum of the first rotation distance / time and the second rotation distance / time is not less than the first shortest distance / time, then the total rotation distance / time = single cycle distance / time * M + the first shortest distance / time, wherein M is a natural number greater than or equal to 1; If the sum of the first rotation distance / time and the second rotation distance / time is less than the first shortest distance / time, then the total rotation distance / time = the first shortest distance / time.

9. The control method of the automatic roll changing device of the coater according to claim 7, characterized by, In the control method, the real-time rotation distance / time of the rubber coating is detected according to the working pulse of the output shaft of the driving mechanism.

10. A storage medium, characterized by The storage medium stores at least one instruction, which is loaded and executed by the processor to implement the operation performed by the control method of the automatic roll changing device of the coating machine according to any one of claims 7 to 9.

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