An intermittent control device and method for a rotary die-cutting machine
By controlling the motor torque through real-time measurement and filtering calculation of the output torque, the problem of decreased positioning accuracy in intermittent production of circular die-cutting machines has been solved, achieving a high-precision and stable production process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING ZODNGOC AUTOMATIC TECH
- Filing Date
- 2026-02-10
- Publication Date
- 2026-06-02
AI Technical Summary
During intermittent production, the starting and stopping of a rotary die-cutting machine causes a decrease in the positioning accuracy of the die-cutting blade, resulting in large product errors and low quality.
The parameters of the intermittent feeding shaft, receiving shaft, and cutting shaft are measured in real time using arc sensors, arc length sensors, and speed sensors. The controller performs three-stage filtering to calculate the output torque and controls the motor torque to achieve intermittent control.
It improves the positioning accuracy of the die-cutting blade, reduces equipment vibration and noise, enhances adaptability and robustness, and extends the service life of the equipment.
Smart Images
Figure CN122125776A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of rotary die-cutting machine technology, and in particular to an intermittent control device and method for a rotary die-cutting machine. Background Technology
[0002] As a high-precision and high-efficiency processing equipment, the rotary die-cutting machine has become an indispensable key equipment in the modern industrial manufacturing field due to its unique technological advantages and wide range of applications. It plays a pivotal role, especially in the production process of consumer electronics and new energy industries.
[0003] However, in some cases, during the intermittent production process of a rotary die-cutting machine, the vibration and impact caused by the start-up and shutdown transitions can alter the position of the die-cutting blade, leading to a decrease in the positioning accuracy of the die-cutting blade and resulting in large errors and low quality in the produced products. Summary of the Invention
[0004] The purpose of this application is to provide an intermittent control device and method for a rotary die-cutting machine, which can improve the positioning accuracy of the die-cutting blade.
[0005] To achieve the above objectives, this application provides the following solution.
[0006] In a first aspect, this application provides an intermittent control device for a rotary die-cutting machine, the rotary die-cutting machine comprising: a feeding shaft, a traction shaft, a continuous cutting shaft, multiple motors, an intermittent feeding shaft, an intermittent receiving shaft, an intermittent cutting shaft, and a receiving shaft; the intermittent control device for the rotary die-cutting machine includes: An arc sensor is installed on the intermittent feeding shaft and the intermittent receiving shaft respectively to measure the arc of the intermittent feeding shaft and the arc of the intermittent receiving shaft; An arc length sensor, mounted on the intermittent cutter shaft, is used to measure the arc length of the intermittent cutter shaft; Speed sensors are installed on the intermittent feeding shaft, intermittent receiving shaft, and intermittent cutting shaft to measure the angular velocity of the intermittent feeding shaft, the angular velocity of the intermittent receiving shaft, and the linear velocity of the intermittent cutting shaft. The controller, connected to the arc sensor, arc length sensor, speed sensor, and motor, determines the roll diameter of the intermittent feeding shaft and the intermittent take-up shaft based on the arc and angular velocity of the intermittent feeding shaft, the arc and angular velocity of the intermittent take-up shaft, and the arc length and linear velocity of the intermittent cutting shaft. It then performs three filters on the roll diameters of the intermittent feeding and take-up shafts. Based on the filtered roll diameters of the intermittent feeding and take-up shafts, it calculates the output torque and controls the torque of the intermittent feeding and take-up shafts via the motor, thus achieving intermittent control of the circular die-cutting machine. The output torque includes the output torque of the intermittent feeding shaft and the output torque of the intermittent take-up shaft.
[0007] Secondly, this application provides an intermittent control method for a rotary die-cutting machine, applied to the intermittent control device for the rotary die-cutting machine described in the first aspect, wherein the intermittent control method for the rotary die-cutting machine includes: Obtain the current state data; the state data includes: the arc and angular velocity of the intermittent feeding shaft, the arc and angular velocity of the intermittent receiving shaft, and the arc length and linear velocity of the intermittent cutting shaft; Based on the current state data, the initial roll diameter at the current moment is calculated using the arc length formula and the speed formula, respectively. The initial roll diameter includes: the initial roll diameter of the intermittent feeding shaft under the arc length method, the initial roll diameter of the intermittent take-up shaft under the arc length method, the initial roll diameter of the intermittent feeding shaft under the speed method, and the initial roll diameter of the intermittent take-up shaft under the speed method. Based on the initial roll diameter at the current moment and the roll diameter at the previous moment, calculate the roll diameter change rate at the current moment; the roll diameter change rate includes: the roll diameter change rate of the intermittent feeding shaft under the arc length method, the roll diameter change rate of the intermittent take-up shaft under the arc length method, the roll diameter change rate of the intermittent feeding shaft under the speed method, and the roll diameter change rate of the intermittent take-up shaft under the speed method; the roll diameter at the previous moment is calculated based on the state data at the previous moment; Compare all roll diameter change rates and select the initial roll diameter with the smaller roll diameter change rate as the roll diameter; the roll diameter includes: the roll diameter of the intermittent feeding shaft and the roll diameter of the intermittent take-up shaft; The roll diameter is filtered three times to obtain the filtered roll diameter; Calculate the motor torque based on the filtered roll diameter; Calculate the output torque based on the motor torque; The intermittent control of the circular die-cutting machine is achieved by controlling the torque of the intermittent feeding shaft and the intermittent receiving shaft based on the output torque.
[0008] According to the specific embodiments provided in this application, this application has the following technical effects: This application utilizes a controller to receive measurements from an arc sensor, an arc length sensor, and a speed sensor, measuring the arc and angular velocity of the intermittent feeding shaft, the arc and angular velocity of the intermittent take-up shaft, and the arc length and linear velocity of the intermittent cutting shaft. This data is used to determine the roll diameters of the intermittent feeding and take-up shafts. After three rounds of filtering, the output torque is calculated based on the filtered roll diameters of the intermittent feeding and take-up shafts. The torque of the intermittent feeding and take-up shafts is then controlled by the motors according to the output torque. In this control process, the roll diameters of the intermittent feeding and take-up shafts are obtained in real-time from the data measured by the sensors, and the output torque is calculated in real-time. This allows for real-time dynamic adjustment of the torques of the intermittent feeding and take-up shafts based on the output torque, thereby improving the positioning accuracy of the die-cutting blade. Attached Figure Description
[0009] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0010] Figure 1 This is a schematic diagram of the circular die-cutting machine provided in this application.
[0011] Figure 2 This application provides a schematic diagram of a module for an intermittent control device of a circular die-cutting machine.
[0012] Figure 3 A schematic diagram of the S-shaped motion trajectory provided in this application.
[0013] Figure 4 A flowchart illustrating an intermittent control method for a rotary die-cutting machine provided in this application.
[0014] Figure 5 A schematic diagram illustrating the calculation of the arc length formula provided in this application.
[0015] Figure 6 A schematic diagram illustrating the calculation of the velocity formula provided in this application.
[0016] Reference numerals in the attached diagram: Feeding shaft-1, Receiving shaft-2, First traction shaft-3, First rotating roller-4, Continuous cutter shaft-5, Second rotating roller-6, Intermittent feeding shaft-7, Intermittent receiving shaft-8, Intermittent cutter shaft-9, Third rotating roller-10, Second traction roller-11, Fourth rotating roller-12, Arc sensor-13, Arc length sensor-14, Speed sensor-15, Controller-16. Detailed Implementation
[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0018] The apparatus and method described in this application pertain to the application of motion control technology in the production of materials and products such as metallic copper foil, silk textures, and transparent plastic films. Addressing the challenges of high production speeds, significant start-stop impacts, and the inability to achieve constant tension control on the feed and take-up shafts in intermittent product production using rotary die-cutting machines, this application presents a set of apparatus and methods suitable for the aforementioned production processes.
[0019] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0020] In one exemplary embodiment, an intermittent control device for a rotary die-cutting machine is provided. This device is applied to existing rotary die-cutting machine equipment, which is mainly used for continuous rotary die-cutting of flexible materials, such as... Figure 1 As shown, the circular die-cutting machine includes: a feeding shaft 1, a receiving shaft 2, a first traction shaft 3, a first rotating roller 4, a continuous cutting shaft 5, a second rotating roller 6, an intermittent feeding shaft 7, an intermittent receiving shaft 8, an intermittent cutting shaft 9, a third rotating roller 10, a second traction roller 11, a fourth rotating roller 12, and multiple motors (not shown in the figure). Figure 2 As shown, the intermittent control device of the rotary die-cutting machine includes: An arc sensor 13 is installed on the intermittent feeding shaft 7 and the intermittent receiving shaft 8 respectively, and is used to measure the arc of the intermittent feeding shaft 7 and the arc of the intermittent receiving shaft 8.
[0021] As one feasible approach, the arc sensor includes: a first arc sensor and a second arc sensor; the first arc sensor is used to measure the arc of the intermittent feeding shaft 7; the second arc sensor is used to measure the arc of the intermittent receiving shaft 8.
[0022] Arc length sensor 14 is mounted on the intermittent cutter shaft and is used to measure the arc length of the intermittent cutter shaft 9; Speed sensors 15 are respectively installed on the intermittent feeding shaft 7, the intermittent receiving shaft 8, and the intermittent cutting shaft 9, and are used to measure the angular velocity of the intermittent feeding shaft 7, the angular velocity of the intermittent receiving shaft 8, and the linear velocity of the intermittent cutting shaft 9; As one feasible approach, the speed sensor includes: a first angular velocity sensor, a second angular velocity sensor, and a linear velocity sensor; the first angular velocity sensor is used to measure the angular velocity of the intermittent feeding shaft 7; the second angular velocity sensor is used to measure the angular velocity of the intermittent receiving shaft 8; and the linear velocity sensor is used to measure the linear velocity of the intermittent cutting shaft 9.
[0023] The controller 16 is connected to the arc sensor 13, the arc length sensor 14, the speed sensor 15, and the motor, respectively. It is used to determine the roll diameter of the intermittent feeding shaft 7 and the roll diameter of the intermittent take-up shaft 8 based on the arc and angular velocity of the intermittent feeding shaft 7, the arc and angular velocity of the intermittent take-up shaft 8, and the arc length and linear velocity of the intermittent cutting shaft 9. It performs three filters on the roll diameters of the intermittent feeding shaft 7 and the intermittent take-up shaft 8. Based on the filtered roll diameters of the intermittent feeding shaft 7 and the intermittent take-up shaft 8, it calculates the output torque and controls the torque of the intermittent feeding shaft 7 and the intermittent take-up shaft 8 through the motor, thus completing the intermittent control of the circular die-cutting machine. The output torque includes the output torque of the intermittent feeding shaft 7 and the output torque of the intermittent take-up shaft 8.
[0024] As one implementable approach, the controller includes: The determining unit is connected to the arc sensor, the arc length sensor and the speed sensor respectively, and is used to determine the roll diameter of the intermittent feeding shaft 7 and the roll diameter of the intermittent taking shaft 8 based on the arc and angular velocity of the intermittent feeding shaft 7, the arc and angular velocity of the intermittent taking shaft 8, and the arc length and linear velocity of the intermittent cutting shaft 9.
[0025] The filtering unit, connected to the determining unit, is used to perform three filters on the roll diameter of the intermittent feeding shaft 7 and the roll diameter of the intermittent take-up shaft 8.
[0026] The calculation unit, connected to the filtering unit, is used to calculate the output torque based on the diameter of the intermittent feeding shaft 7 and the diameter of the intermittent receiving shaft 8 after filtering.
[0027] The control unit is connected to the filter unit and the motor respectively, and is used to control the torque of the intermittent feeding shaft 7 and the torque of the intermittent receiving shaft 8 through the motor according to the output torque, so as to complete the intermittent control of the circular die-cutting machine.
[0028] Specifically, the motor is a servo motor, and the controller consists of a host computer and a PLC.
[0029] Specifically, controller 16 is also used to generate intermittent motion trajectories based on the production process parameters set by the upper-level controller, and to determine whether non-critical parameters exceed reasonable ranges based on user-defined key parameters, making corrections to reduce customer operations. For example... Figure 3As shown, because the generated motion trajectory is S-shaped, the movements are smoother during acceleration and deceleration, reducing mechanical overshoot, improving positioning accuracy, and reducing equipment operating noise.
[0030] The controller achieves motion control of the cutter axis through high-order smooth speed planning, abandoning the traditional trapezoidal curve and adopting a high-order polynomial curve for motion trajectory planning. Furthermore, feedforward compensation is introduced, which preemptively offsets known inertial forces and frictional forces in the system, significantly reducing the controller's tracking error, especially during high-speed acceleration and deceleration, greatly improving dynamic response speed and positioning accuracy. The expression for the high-order polynomial is as follows: .
[0031] in, This refers to the axis position of the intermittent cutter axis. This represents the real-time position of the continuous cutting axis. This is the starting position of the continuous cutting axis. The coefficients of the third-order terms, The coefficients of the second-order terms, The coefficients of the first-order terms, This is a constant term.
[0032] The beneficial effects of the intermittent control device for the rotary die-cutting machine proposed in this application are mainly reflected in: In view of the current situation that the production speed of the rotary die-cutting machine is fast and the start-stop impact is large, and the intermittent feeding shaft and intermittent receiving shaft cannot achieve constant tension control, the device of this application can dynamically adjust the roll diameter of the intermittent receiving shaft and intermittent feeding shaft in real time according to the data detected by the sensor, thereby dynamically adjusting the output torque in real time. By controlling the torque of the intermittent receiving shaft and intermittent feeding shaft, the vibration and impact in high-speed intermittent motion are reduced. (1) The positioning accuracy and repeatability of the die-cutting blade roller (or platform) during high-speed start-stop process are greatly improved; (2) The effective production speed is maximized (shortening the start-stop time and increasing the average speed) while ensuring accuracy and stability; (3) The adaptability and robustness to different working conditions (speed, load, die-cutting length) are enhanced; (4) The operating noise and energy consumption of the equipment are reduced, and the service life of the equipment is extended; (5) The diameter calculation is accurate and the fluctuation error is small (±0.5mm), and the tension control is ±1N.
[0033] Based on the same inventive concept, this application also provides an intermittent control method for a rotary die-cutting machine, which is applied to the aforementioned intermittent control device for a rotary die-cutting machine. Figure 4 As shown, the intermittent control method for the rotary die-cutting machine includes steps S1 to S8: Step S1: Obtain the current state data; the state data includes: the arc and angular velocity of the intermittent feeding shaft, the arc and angular velocity of the intermittent receiving shaft, and the arc length and linear velocity of the intermittent cutting shaft.
[0034] Step S2: Based on the current state data, calculate the initial roll diameter at the current moment using the arc length formula and the speed formula respectively; the initial roll diameter includes: the initial roll diameter of the intermittent feeding shaft under the arc length method, the initial roll diameter of the intermittent receiving shaft under the arc length method, the initial roll diameter of the intermittent feeding shaft under the speed method, and the initial roll diameter of the intermittent receiving shaft under the speed method.
[0035] As one feasible approach, step S2 specifically includes steps S21 to S24: Step S21: Based on the arc of the intermittent feeding shaft and the arc length of the intermittent cutting shaft, calculate the initial roll diameter of the intermittent feeding shaft using the arc length formula.
[0036] Step S22: Based on the arc of the intermittent take-up shaft and the arc length of the intermittent cutter shaft, calculate the initial roll diameter of the intermittent take-up shaft using the arc length formula.
[0037] Step S23: Based on the angular velocity of the intermittent feeding shaft and the linear velocity of the intermittent cutting shaft, calculate the initial roll diameter of the intermittent feeding shaft using the speed formula.
[0038] Step S24: Based on the angular velocity of the intermittent take-up shaft and the linear velocity of the intermittent cutter shaft, calculate the initial roll diameter of the intermittent take-up shaft using the speed formula.
[0039] Specifically, such as Figure 5 As shown, the arc length formula is: .in, This is the initial roll diameter; In radians; It is the arc length.
[0040] like Figure 6 As shown, the velocity method formula is: .in, Linear velocity; ω is the angular velocity.
[0041] Step S3: Calculate the roll diameter change rate at the current moment based on the initial roll diameter at the current moment and the roll diameter at the previous moment; the roll diameter change rate includes: the roll diameter change rate of the intermittent feeding shaft under the arc length method, the roll diameter change rate of the intermittent take-up shaft under the arc length method, the roll diameter change rate of the intermittent feeding shaft under the speed method, and the roll diameter change rate of the intermittent take-up shaft under the speed method; the roll diameter at the previous moment is calculated based on the state data at the previous moment.
[0042] As one feasible approach, step S3 specifically includes steps S31 to S34: Step S31: Based on the initial roll diameter of the intermittent feeding shaft under the arc length method and the roll diameter at the previous moment, calculate the roll diameter change rate of the intermittent feeding shaft under the arc length method at the current moment.
[0043] Step S32: Based on the initial roll diameter of the intermittent take-up shaft under the arc length method and the roll diameter at the previous moment, calculate the roll diameter change rate of the intermittent take-up shaft under the arc length method at the current moment.
[0044] Step S33: Based on the initial roll diameter of the intermittent feeding shaft under the speed method and the roll diameter at the previous moment, calculate the roll diameter change rate of the intermittent feeding shaft under the speed method at the current moment.
[0045] Step S34: Based on the initial roll diameter of the intermittent take-up shaft under the speed method and the roll diameter at the previous moment, calculate the roll diameter change rate of the intermittent take-up shaft under the speed method at the current moment.
[0046] Step S4: Compare all roll diameter change rates and select the initial roll diameter with the smaller roll diameter change rate as the roll diameter; the roll diameter includes: the roll diameter of the intermittent feeding shaft and the roll diameter of the intermittent take-up shaft.
[0047] Specifically, the roll diameter change rates calculated under different methods are compared, and the roll diameter with the smaller change rate is selected as the roll diameter for subsequent calculations. Specifically, the roll diameter change rates of the intermittent feeding shaft under the arc length method and the intermittent feeding shaft under the speed method are compared, and the roll diameter with the smaller change rate is selected as the roll diameter of the intermittent feeding shaft; similarly, the roll diameter change rates of the intermittent take-up shaft under the arc length method and the intermittent take-up shaft under the speed method are compared, and the roll diameter with the smaller change rate is selected as the roll diameter of the intermittent take-up shaft.
[0048] Step S5: Perform three filters on the roll diameter to obtain the filtered roll diameter.
[0049] As one feasible approach, the filtered roll diameter includes: the roll diameter filtered by the intermittent feeding shaft and the roll diameter filtered by the intermittent take-up shaft; step S5 specifically includes steps S51 to S53: Step S51: Determine whether the roll diameter is within the roll diameter threshold range; if yes, determine that the roll diameter is the roll diameter after the first filtering; if no, determine that the roll diameter at the previous moment is the filtered roll diameter.
[0050] Step S52: Determine whether the increment between the first filtered volume diameter and the volume diameter at the previous moment is less than or equal to the volume diameter increment threshold; if yes, then determine the first filtered volume diameter as the second filtered volume diameter; if no, then determine the previous volume diameter as the filtered volume diameter.
[0051] Step S53: Based on the roll diameter after the second filtering and the roll diameter at the previous moment, a first-order low-pass filter is used for fitting to obtain the filtered roll diameter.
[0052] As an feasible approach, the fitting formula for fitting using a first-order low-pass filter is as follows: .
[0053] in, This is the diameter of the filtered roll; and These are the mean and the fitting coefficients; This is the roll diameter after the second filtering; The diameter of the roll at the previous moment.
[0054] Specifically, the roll diameter is first subjected to amplitude limiting filtering to remove those exceeding the roll diameter threshold range, completing the first filtering step. Then, incremental amplitude limiting filtering is applied to the roll diameter after the first filtering step. The increment between the roll diameter after the first filtering step and the roll diameter at the previous moment is compared with the roll diameter increment threshold. If it does not exceed the roll diameter increment threshold, it is determined to be a valid value, completing the second filtering step. Finally, based on the roll diameter after the second filtering step and the roll diameter at the previous moment, a first-order low-pass filter is used for weighted fitting. The magnitude of the fitting coefficients in this filtering step will affect the real-time performance of the final roll diameter value. After the above three filtering steps, a value close to the actual value has been obtained. However, in order to ensure the stability and smoothness of the roll diameter value, a moving average filtering can be applied to the roll diameter value to obtain a stable roll diameter value, thereby ensuring constant tension control.
[0055] Step S6: Calculate the motor torque based on the filtered roll diameter.
[0056] Step S7: Calculate the output torque based on the motor torque.
[0057] Specifically, during intermittent operation, the controller will control the motor to apply output torque to the feeding and receiving shafts for torque compensation when the equipment starts and stops. This can significantly reduce the tension changes of the feeding and receiving shafts during start-up and shutdown, reduce operating noise, and increase the operating speed of the equipment.
[0058] As an feasible approach, the intermittent feeding shaft and intermittent receiving shaft employ open-loop torque control, and the formula for calculating the output torque is as follows: .
[0059] .
[0060] .
[0061] in, This is the output torque; Friction torque; This refers to the motor torque; To set the tension; The radius is ; This is the diameter of the filtered roll.
[0062] Specifically, it is evident that friction torque has a significant impact on output torque, making friction identification essential. Friction torque mainly comprises two parts: firstly, static friction torque identification, which involves repeatedly accelerating from a standstill to a constant speed by running the servo motor bidirectionally. The target speed during this process should not be too high. The real-time torque of the servo motor is recorded during this process, and the maximum value obtained after each repetition is taken as the effective value. The average of these multiple maximum values is then calculated to obtain the static friction torque. Secondly, dynamic friction torque identification involves setting multiple target speeds. Once the servo motor reaches its operating speed, the real-time torque is continuously recorded. The average of the torque obtained at each target speed is then calculated. This allows for the fitting of a linear model of dynamic friction based on the aforementioned data.
[0063] Step S8: Based on the output torque control, control the torque of the intermittent feeding shaft and the torque of the intermittent receiving shaft to complete the intermittent control of the circular die-cutting machine.
[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0065] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. An intermittent control device for a rotary die-cutting machine, the rotary die-cutting machine comprising: The rotary die-cutting machine comprises a feeding shaft, a traction shaft, a continuous cutting shaft, multiple motors, an intermittent feeding shaft, an intermittent receiving shaft, an intermittent cutting shaft, and a receiving shaft; characterized in that the intermittent control device of the rotary die-cutting machine includes: An arc sensor is installed on the intermittent feeding shaft and the intermittent receiving shaft respectively, and is used to measure the arc of the intermittent feeding shaft and the arc of the intermittent receiving shaft; An arc length sensor, mounted on the intermittent cutter shaft, is used to measure the arc length of the intermittent cutter shaft; Speed sensors are installed on the intermittent feeding shaft, intermittent receiving shaft, and intermittent cutting shaft to measure the angular velocity of the intermittent feeding shaft, the angular velocity of the intermittent receiving shaft, and the linear velocity of the intermittent cutting shaft. The controller, connected to the arc sensor, arc length sensor, speed sensor, and motor, determines the roll diameter of the intermittent feeding shaft and the intermittent take-up shaft based on the arc and angular velocity of the intermittent feeding shaft, the arc and angular velocity of the intermittent take-up shaft, and the arc length and linear velocity of the intermittent cutting shaft. It then performs three filters on the roll diameters of the intermittent feeding and take-up shafts. Based on the filtered roll diameters of the intermittent feeding and take-up shafts, it calculates the output torque and controls the torque of the intermittent feeding and take-up shafts via the motor, thus achieving intermittent control of the circular die-cutting machine. The output torque includes the output torque of the intermittent feeding shaft and the output torque of the intermittent take-up shaft.
2. The intermittent control device for the rotary die-cutting machine according to claim 1, characterized in that, The arc sensor includes: a first arc sensor and a second arc sensor; The first arc sensor is used to measure the arc of the intermittent feeding shaft; The second arc sensor is used to measure the arc of the intermittent take-up shaft.
3. The intermittent control device for the rotary die-cutting machine according to claim 1, characterized in that, The velocity sensor includes: a first angular velocity sensor, a second angular velocity sensor, and a linear velocity sensor; The first angular velocity sensor is used to measure the angular velocity of the intermittent feeding shaft; The second angular velocity sensor is used to measure the angular velocity of the intermittent take-up shaft; The linear velocity sensor is used to measure the linear velocity of the intermittent cutter shaft.
4. The intermittent control device for the rotary die-cutting machine according to claim 1, characterized in that, The controller includes: The determining unit is connected to the arc sensor, the arc length sensor and the speed sensor respectively, and is used to determine the roll diameter of the intermittent feeding shaft and the roll diameter of the intermittent taking shaft based on the arc and angular velocity of the intermittent feeding shaft, the arc and angular velocity of the intermittent taking shaft, and the arc length and linear velocity of the intermittent cutting shaft. A filtering unit, connected to the determining unit, is used to perform three filters on the roll diameter of the intermittent feeding shaft and the roll diameter of the intermittent take-up shaft. A calculation unit, connected to the filtering unit, is used to calculate the output torque based on the diameter of the intermittent feeding shaft and the diameter of the intermittent take-up shaft after filtering. The control unit is connected to the filter unit and the motor respectively, and is used to control the torque of the intermittent feeding shaft and the torque of the intermittent receiving shaft through the motor according to the output torque, so as to complete the intermittent control of the circular die-cutting machine.
5. An intermittent control method for a rotary die-cutting machine, characterized in that, An intermittent control device for a rotary die-cutting machine according to any one of claims 1-4, wherein the intermittent control method for the rotary die-cutting machine comprises: Obtain the current state data; the state data includes: the arc and angular velocity of the intermittent feeding shaft, the arc and angular velocity of the intermittent receiving shaft, and the arc length and linear velocity of the intermittent cutting shaft; Based on the current state data, the initial roll diameter at the current moment is calculated using the arc length formula and the speed formula, respectively. The initial roll diameter includes: the initial roll diameter of the intermittent feeding shaft under the arc length method, the initial roll diameter of the intermittent take-up shaft under the arc length method, the initial roll diameter of the intermittent feeding shaft under the speed method, and the initial roll diameter of the intermittent take-up shaft under the speed method. Based on the initial roll diameter at the current moment and the roll diameter at the previous moment, calculate the roll diameter change rate at the current moment; the roll diameter change rate includes: the roll diameter change rate of the intermittent feeding shaft under the arc length method, the roll diameter change rate of the intermittent take-up shaft under the arc length method, the roll diameter change rate of the intermittent feeding shaft under the speed method, and the roll diameter change rate of the intermittent take-up shaft under the speed method; the roll diameter at the previous moment is calculated based on the state data at the previous moment; Compare all roll diameter change rates and select the initial roll diameter with the smaller roll diameter change rate as the roll diameter; the roll diameter includes: the roll diameter of the intermittent feeding shaft and the roll diameter of the intermittent take-up shaft; The roll diameter is filtered three times to obtain the filtered roll diameter; Calculate the motor torque based on the filtered roll diameter; Calculate the output torque based on the motor torque; The intermittent control of the circular die-cutting machine is achieved by controlling the torque of the intermittent feeding shaft and the intermittent receiving shaft based on the output torque.
6. The intermittent control method for a rotary die-cutting machine according to claim 5, characterized in that, Based on the current state data, the initial roll diameter at the current moment is calculated using both the arc length formula and the velocity formula, specifically including: Based on the arc of the intermittent feeding shaft and the arc length of the intermittent cutting shaft, the initial roll diameter of the intermittent feeding shaft is calculated using the arc length formula. Based on the arc of the intermittent take-up shaft and the arc length of the intermittent cutter shaft, the initial roll diameter of the intermittent take-up shaft is calculated using the arc length formula. Based on the angular velocity of the intermittent feeding shaft and the linear velocity of the intermittent cutting shaft, the initial roll diameter of the intermittent feeding shaft is calculated using the velocity formula. Based on the angular velocity of the intermittent take-up shaft and the linear velocity of the intermittent cutter shaft, the initial roll diameter of the intermittent take-up shaft is calculated using the velocity formula.
7. The intermittent control method for a rotary die-cutting machine according to claim 5, characterized in that, The calculation of the roll diameter change rate at the current moment, based on the initial roll diameter at the current moment and the roll diameter at the previous moment, specifically includes: Based on the initial roll diameter of the intermittent feeding shaft under the arc length method and the roll diameter at the previous moment, calculate the rate of change of the roll diameter of the intermittent feeding shaft under the arc length method at the current moment. Based on the initial roll diameter of the intermittent take-up shaft under the arc length method and the roll diameter at the previous moment, calculate the roll diameter change rate of the intermittent take-up shaft under the arc length method at the current moment. Based on the initial roll diameter of the intermittent feeding shaft under the speed method and the roll diameter at the previous moment, calculate the roll diameter change rate of the intermittent feeding shaft under the speed method at the current moment. Based on the initial roll diameter of the intermittent take-up shaft under the speed method and the roll diameter at the previous moment, calculate the roll diameter change rate of the intermittent take-up shaft under the speed method at the current moment.
8. The intermittent control method for a rotary die-cutting machine according to claim 5, characterized in that, The filtered roll diameter includes: the roll diameter filtered by the intermittent feeding shaft and the roll diameter filtered by the intermittent take-up shaft; The roll diameter is filtered three times to obtain the filtered roll diameter, specifically including: Determine whether the roll diameter is within the roll diameter threshold range; if yes, determine that the roll diameter is the roll diameter after the first filtering; if no, determine that the roll diameter at the previous moment is the filtered roll diameter. Determine whether the increment between the volume diameter after the first filtering and the volume diameter at the previous moment is less than or equal to the volume diameter increment threshold; if yes, then determine the volume diameter after the first filtering as the volume diameter after the second filtering; if no, then determine the volume diameter at the previous moment as the filtered volume diameter. Based on the volume diameter after the second filtering and the volume diameter at the previous moment, a first-order low-pass filter is used for fitting to obtain the filtered volume diameter.
9. The intermittent control method for a rotary die-cutting machine according to claim 1, characterized in that, The fitting formula using a first-order low-pass filter is as follows: ； in, This is the diameter of the filtered roll; and These are the mean and the fitting coefficients; This is the roll diameter after the second filtering; The diameter of the roll at the previous moment.
10. The intermittent control method for a rotary die-cutting machine according to claim 5, characterized in that, The formula for calculating the output torque is: ； ； ； in, This is the output torque; Friction torque; This refers to the motor torque; To set the tension; The radius is ; This is the diameter of the filtered roll.