A plastic-based coated abrasive flatness control method, device, equipment and medium

Abstract

The present application relates to the technical field of coated abrasive, and particularly relates to a plastic-based coated abrasive flatness control method, device, equipment and medium, which comprises the following steps: adding an ironing process after the glue drying process of the plastic-based coated abrasive roll stock, so that the plastic substrate surface passes through a high-temperature drying cylinder, and then cooling after ironing; collecting the flatness of the plastic substrate surface after the ironing process and the ironing process parameters; setting the flatness parameters, monitoring the flatness of the plastic substrate surface after the ironing process by using a closed-loop feedback algorithm, and adjusting the ironing process parameters. In the present application, the ironing process heats and cools the plastic substrate through a high-temperature drying cylinder, which can effectively eliminate the deformation such as warping and bulging in the glue drying process, and improve the flatness of the substrate surface. The closed-loop feedback algorithm is used to monitor and adjust the ironing parameters, so that the process parameters are always in the best state in the production process, and the process stability and consistency are improved.

Description

Technical Field

[0001] This invention relates to the field of coated abrasives technology, and more particularly to a method, apparatus, equipment and medium for controlling the flatness of plastic-based coated abrasives. Background Technology

[0002] Existing plastic-based coated abrasives are widely used in fine surface processing such as mobile phone casings and automotive paint due to their high surface precision. They mainly exist in the form of discs and abrasive belts.

[0003] In the rotary fabrication process, with the improvement of automation, the replacement of the rotary fabric is completed by the robotic arm. However, when the rotary fabric is uneven, the positioning is prone to deviation, resulting in a low success rate of the robotic arm and affecting the efficiency of use. Therefore, the unevenness of roll products and rotary products needs to be further improved.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the general background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] This invention provides a method, apparatus, equipment, and medium for controlling the flatness of plastic-based coated abrasives, thereby effectively solving the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a method for controlling the flatness of plastic-based coated abrasives, comprising the following steps:

[0007] After the adhesive drying process of the plastic-based mold roll, an ironing process is added so that the plastic substrate surface passes through a high-temperature drying cylinder, is ironed, and then cooled.

[0008] Collect data on the flatness of the plastic substrate surface after the ironing process and the ironing process parameters.

[0009] Set flatness parameters, use a closed-loop feedback algorithm to monitor the flatness of the plastic substrate surface after the ironing process, and adjust the ironing process parameters.

[0010] Furthermore, the ironing process parameters include: the feeding speed of the plastic substrate, the temperature of the drying cylinder, and the rotation speed of the drying cylinder.

[0011] Furthermore, the method of using a closed-loop feedback algorithm to monitor the flatness of the plastic substrate surface after the ironing process and to adjust the ironing process parameters includes:

[0012] Calculate the error between the flatness parameters and the measured flatness;

[0013] A proportional-integral-derivative (PID) control algorithm is defined, and the PID algorithm is discretized.

[0014] Turn off the integral and derivative components in the PID algorithm and gradually increase the proportional coefficient until the system output begins to oscillate continuously.

[0015] Record the critical proportional gain and oscillation period, and calculate the proportional, integral, and differential parameters based on the critical proportional gain and oscillation period;

[0016] The ironing process parameters are adjusted by a discretized PID algorithm based on the calculated proportional, integral, and derivative parameters.

[0017] Furthermore, the defined proportional-integral-derivative PID control algorithm, and the discretization of the PID algorithm, include:

[0018] PID control algorithm:

[0019]

[0020] In the formula, u(t) is the control output, i.e., the adjustment value of the ironing process parameters, and K p K is the proportionality coefficient. i K is the integral coefficient. d Here, t is the differential coefficient, and e(t) is the error between the flatness parameter and the measured flatness.

[0021] The discretization of the PID algorithm is as follows:

[0022]

[0023] In the formula, e[k] represents the error at the k-th sampling time, u[k] represents the control output at the k-th sampling time, and Δt is the sampling period.

[0024] Further, the calculation of the proportional, integral, and differential parameters based on the critical proportional gain and oscillation period includes:

[0025] K p =0.6K u ;

[0026]

[0027] In the formula, K p K is the proportionality coefficient. i K is the integral coefficient. d K is the differential coefficient. u For the critical proportional gain, T u The oscillation period is [the period of time].

[0028] Furthermore, the adjustment of ironing process parameters through the discretized PID algorithm also includes setting independent PID control for the feeding speed of the plastic substrate, the temperature of the drying cylinder, and the rotation speed of the drying cylinder in the ironing process parameters.

[0029] Furthermore, the flatness of the sampled plastic substrate surface after the ironing process includes:

[0030] Laser contour scanning is used to scan the surface of the cooled plastic substrate to determine its flatness.

[0031] The present invention also includes a plastic-based coated abrasive mold flatness control device, using the method described above, the device comprising:

[0032] An ironing device is used to add an ironing process after the coating and drying process of the plastic base material coated with mold roll, so that the plastic base material surface passes through a high-temperature drying cylinder, is ironed and then cooled.

[0033] The data acquisition unit is used to acquire the flatness of the plastic substrate surface and the ironing process parameters after the ironing process.

[0034] A closed-loop control unit is used to set flatness parameters, use a closed-loop feedback algorithm to monitor the flatness of the plastic substrate surface after the ironing process, and adjust the ironing process parameters.

[0035] The present invention also includes a computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method as described above.

[0036] The present invention also includes a storage medium having a computer program stored thereon, which, when executed by a processor, implements the method as described above.

[0037] The beneficial effects of this invention are as follows: The ironing process, through heating and cooling the plastic substrate in a high-temperature drying cylinder, effectively eliminates deformations such as warping and bulging during the adhesive drying process, improving the flatness of the substrate surface. A closed-loop feedback algorithm is used to monitor and adjust the ironing parameters, ensuring that the process parameters are always in an optimal state during production, thus improving process stability and consistency. Optimizing product flatness by dynamically adjusting ironing parameters effectively reduces defects and scrap caused by unevenness, lowering production losses. The improved flatness reduces positioning deviations of disc products during robotic gripping, increasing the success rate of gripping and thus improving the efficiency of automated operations. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a flowchart of the method of the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of the device of the present invention;

[0041] Figure 3 This is a schematic diagram of the structure of the computer device of the present invention. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0043] like Figure 1 As shown: A method for controlling the flatness of plastic-based coated abrasives includes the following steps:

[0044] After the adhesive drying process of the plastic-based mold roll, an ironing process is added so that the plastic substrate surface passes through a high-temperature drying cylinder, is ironed, and then cooled.

[0045] Collect data on the flatness of the plastic substrate surface after the ironing process and the ironing process parameters.

[0046] Set flatness parameters, use a closed-loop feedback algorithm to monitor the flatness of the plastic substrate surface after the ironing process, and adjust the ironing process parameters.

[0047] The ironing process, which heats and cools the plastic substrate in a high-temperature drying cylinder, effectively eliminates warping, bulging, and other deformations that occur during the adhesive drying process, improving the flatness of the substrate surface. A closed-loop feedback algorithm is used to monitor and adjust the ironing parameters, ensuring that these parameters remain optimal throughout production, thus enhancing process stability and consistency. Optimizing product flatness through dynamic adjustment of ironing parameters effectively reduces defects and scrap caused by unevenness, lowering production losses. The improved flatness reduces positioning deviations of disc-shaped products during robotic gripping, increasing the success rate of gripping and thereby improving the efficiency of automated operations.

[0048] In this embodiment, the ironing process parameters include: the feeding speed of the plastic substrate, the temperature of the drying cylinder, and the rotation speed of the drying cylinder.

[0049] By controlling the feeding speed, drying cylinder temperature, and drying cylinder rotation speed, the heating and cooling process of the plastic substrate can be precisely adjusted, ensuring more stable flatness. Ironing parameters can be flexibly adjusted according to different material properties and production environments to meet diverse production needs.

[0050] The diameter of the drying cylinder is between 200mm and 4000mm, preferably between 500mm and 3000mm, and more preferably between 800mm and 2500mm; the heating temperature of the drying cylinder is between 60℃ and 250℃, preferably between 80℃ and 230℃, and more preferably between 100℃ and 220℃; the drying cylinder can be heated by thermal oil or by electric heating; the drying cylinder can also be in one or more sets;

[0051] As a preferred embodiment of the above, a closed-loop feedback algorithm is used to monitor the flatness of the plastic substrate surface after the ironing process and to adjust the ironing process parameters, including:

[0052] Calculate the error between the flatness parameters and the measured flatness;

[0053] Set up a proportional-integral-derivative PID control algorithm and discretize the PID algorithm;

[0054] Turn off the integral and derivative components in the PID algorithm and gradually increase the proportional coefficient until the system output begins to oscillate continuously.

[0055] Record the critical proportional gain and oscillation period, and calculate the proportional, integral, and differential parameters based on the critical proportional gain and oscillation period;

[0056] The ironing process parameters are adjusted by a discretized PID algorithm based on the calculated proportional, integral, and derivative parameters.

[0057] By gradually increasing the proportional gain and calculating the critical proportional gain and oscillation period, optimal control parameters can be effectively determined, enabling the PID controller to respond quickly and adjust ironing process parameters. Employing a PID control algorithm to achieve closed-loop feedback regulation allows for automatic correction of ironing parameters based on actual smoothness deviations, avoiding instability caused by human intervention. By disabling integral and derivative components and gradually increasing the proportional gain, the optimal stable point of the system can be quickly found, significantly shortening parameter tuning time and improving debugging efficiency. During dynamic monitoring and adjustment, the PID algorithm continuously optimizes parameters, significantly reducing smoothness fluctuations and improving the stability of batch products.

[0058] The proportional-integral-derivative (PID) control algorithm is defined, and the PID algorithm is discretized, including:

[0059] PID control algorithm:

[0060]

[0061] In the formula, u(t) is the control output, i.e., the adjustment value of the ironing process parameters, and K p K is the proportionality coefficient. i K is the integral coefficient. d Here, t is the differential coefficient, and e(t) is the error between the flatness parameter and the measured flatness.

[0062] Discretization of the PID algorithm:

[0063]

[0064] In the formula, e[k] represents the error at the k-th sampling time, u[k] represents the control output at the k-th sampling time, and Δt is the sampling period.

[0065] As a preferred embodiment of the above, the calculation of proportional, integral, and derivative parameters based on the critical proportional gain and oscillation period includes:

[0066] K p =0.6K u ;

[0067]

[0068] In the formula, K p K is the proportionality coefficient. i K is the integral coefficient. d K is the differential coefficient. u For the critical proportional gain, T u The oscillation period is [the period of time].

[0069] In this embodiment, the ironing process parameters are adjusted by a discretized PID algorithm, and the method further includes setting independent PID control for the feeding speed of the plastic substrate, the temperature of the drying cylinder, and the rotation speed of the drying cylinder in the ironing process parameters.

[0070] By setting independent PID controls for the feeding speed, drying cylinder temperature, and drying cylinder speed of the plastic substrate, interference caused by multi-parameter linkage is avoided, enabling more precise control of each parameter. With each parameter adjusted individually, the system can respond more quickly and stably to deviation changes, reducing the impact of parameter fluctuations on flatness. Independent PID control can more quickly determine the optimal values ​​of each parameter, shorten debugging time, and improve production efficiency. Independent control of each parameter avoids mutual interference between parameters, reducing the risk of system instability caused by improper adjustment of a single parameter.

[0071] The flatness of the plastic substrate surface after the ironing process is measured, including:

[0072] Laser contour scanning is used to scan the surface of the cooled plastic substrate to determine its flatness.

[0073] Laser profilometry offers nanometer- or micrometer-level precision, accurately capturing minute imperfections on the surface of plastic substrates and improving measurement reliability. Eliminating the need for physical contact avoids scratches or deformation caused by the measuring tool touching the substrate, ensuring data accuracy. Laser profilometry provides complete 3D surface profile data, facilitating analysis and rapid identification of uneven areas, thereby enabling more effective adjustment of ironing process parameters.

[0074] like Figure 2 As shown, this embodiment also includes a plastic-based coated abrasive mold flatness control device, using the method described above. The device includes:

[0075] Ironing device: The ironing device is used to add an ironing process after the coating and drying process of the plastic base material coated with mold roll material, so that the plastic base material surface passes through a high-temperature drying cylinder, is ironed and then cooled.

[0076] The data acquisition unit is used to collect the flatness of the plastic substrate surface and the ironing process parameters after the ironing process.

[0077] The closed-loop control unit is used to set the flatness parameters, use a closed-loop feedback algorithm to monitor the flatness of the plastic substrate surface after the ironing process, and adjust the ironing process parameters.

[0078] The ironing process, which heats and cools the plastic substrate in a high-temperature drying cylinder, effectively eliminates warping, bulging, and other deformations that occur during the adhesive drying process, improving the flatness of the substrate surface. A closed-loop feedback algorithm is used to monitor and adjust the ironing parameters, ensuring that these parameters remain optimal throughout production, thus enhancing process stability and consistency. Optimizing product flatness through dynamic adjustment of ironing parameters effectively reduces defects and scrap caused by unevenness, lowering production losses. The improved flatness reduces positioning deviations of disc-shaped products during robotic gripping, increasing the success rate of gripping and thereby improving the efficiency of automated operations.

[0079] Please see Figure 3 The diagram shows a structural schematic of a computer device provided in an embodiment of this application. An embodiment of this application provides a computer device 400, including a processor 410 and a memory 420. The memory 420 stores a computer program executable by the processor 410. When the computer program is executed by the processor 410, it performs the method described above.

[0080] This application embodiment also provides a storage medium 430, on which a computer program is stored, and the computer program is executed by a processor 410 to perform the above method.

[0081] The storage medium 430 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Red-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0082] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0083] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0084] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0085] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0086] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0087] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0088] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0089] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for controlling the flatness of plastic-based coated abrasives, characterized in that, Includes the following steps: After the adhesive drying process of the plastic-based mold roll, an ironing process is added so that the plastic substrate surface passes through a high-temperature drying cylinder, is ironed, and then cooled. Collect data on the flatness of the plastic substrate surface after the ironing process and the ironing process parameters. Set flatness parameters, use a closed-loop feedback algorithm to monitor the flatness of the plastic substrate surface after the ironing process, and adjust the ironing process parameters accordingly. The ironing process parameters include: the feeding speed of the plastic substrate, the temperature of the drying cylinder, and the rotation speed of the drying cylinder; The method of using a closed-loop feedback algorithm to monitor the flatness of the plastic substrate surface after the ironing process and to adjust the ironing process parameters includes: Calculate the error between the flatness parameters and the measured flatness; A proportional-integral-derivative (PID) control algorithm is defined, and the PID control algorithm is discretized. Turn off the integral and derivative components in the proportional-integral-derivative PID control algorithm, and gradually increase the proportional coefficient until the system output begins to oscillate continuously; Record the critical proportional gain and oscillation period, and calculate the proportional, integral, and differential parameters based on the critical proportional gain and oscillation period; The ironing process parameters are adjusted by using a discretized proportional-integral-derivative PID control algorithm based on the calculated proportional, integral, and derivative parameters. The specified proportional-integral-derivative PID control algorithm, and the discretization of the proportional-integral-derivative PID control algorithm, include: PID control algorithm: ； In the formula, u(t) is the control output, i.e., the adjustment value of the ironing process parameters, and K p K is the proportionality coefficient. i K is the integral coefficient. d Here, t is the differential coefficient, and e(t) is the error between the flatness parameter and the measured flatness. Discretization of the proportional-integral-derivative PID control algorithm: ； In the formula, e[k] represents the error at the k-th sampling time, and u[k] represents the control output at the k-th sampling time. The sampling period; The calculation of the proportional, integral, and differential parameters based on the critical proportional gain and oscillation period includes: ； ； ； In the formula, K p K is the proportionality coefficient. i K is the integral coefficient. d K is the differential coefficient. u For the critical proportional gain, T u The oscillation period is [the period of time].

2. The method for controlling the flatness of plastic-based coated abrasives according to claim 1, characterized in that, The method of adjusting the ironing process parameters through the discretized proportional-integral-derivative PID control algorithm also includes setting independent PID control for the feeding speed of the plastic substrate, the temperature of the drying cylinder, and the rotation speed of the drying cylinder in the ironing process parameters.

3. The method for controlling the flatness of plastic-based coated abrasives according to claim 1, characterized in that, The flatness of the plastic substrate surface after the ironing process is measured, including: Laser contour scanning is used to scan the surface of the cooled plastic substrate to determine its flatness.

4. A device for controlling the flatness of plastic-based coated abrasives, characterized in that, Using the method as described in any one of claims 1 to 3, the apparatus comprises: An ironing device is used to add an ironing process after the coating and drying process of the plastic base material coated with mold roll, so that the plastic base material surface passes through a high-temperature drying cylinder, is ironed and then cooled. The data acquisition unit is used to acquire the flatness of the plastic substrate surface and the ironing process parameters after the ironing process. A closed-loop control unit is used to set flatness parameters, use a closed-loop feedback algorithm to monitor the flatness of the plastic substrate surface after the ironing process, and adjust the ironing process parameters. The ironing process parameters include: the feeding speed of the plastic substrate, the temperature of the drying cylinder, and the rotation speed of the drying cylinder; The method of using a closed-loop feedback algorithm to monitor the flatness of the plastic substrate surface after the ironing process and to adjust the ironing process parameters includes: Calculate the error between the flatness parameters and the measured flatness; A proportional-integral-derivative (PID) control algorithm is defined, and the PID control algorithm is discretized. Turn off the integral and derivative components in the proportional-integral-derivative PID control algorithm, and gradually increase the proportional coefficient until the system output begins to oscillate continuously; Record the critical proportional gain and oscillation period, and calculate the proportional, integral, and differential parameters based on the critical proportional gain and oscillation period; The ironing process parameters are adjusted by using a discretized proportional-integral-derivative PID control algorithm based on the calculated proportional, integral, and derivative parameters. The specified proportional-integral-derivative PID control algorithm, and the discretization of the proportional-integral-derivative PID control algorithm, include: PID control algorithm: ； In the formula, u(t) is the control output, i.e., the adjustment value of the ironing process parameters, and K p K is the proportionality coefficient. i K is the integral coefficient. d Here, t is the differential coefficient, and e(t) is the error between the flatness parameter and the measured flatness. Discretization of the proportional-integral-derivative PID control algorithm: ； In the formula, e[k] represents the error at the k-th sampling time, and u[k] represents the control output at the k-th sampling time. The sampling period; The calculation of the proportional, integral, and differential parameters based on the critical proportional gain and oscillation period includes: ； ； ； In the formula, K p K is the proportionality coefficient. i K is the integral coefficient. d K is the differential coefficient. u For the critical proportional gain, T u The oscillation period is [the period of time].

5. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method as described in any one of claims 1-3.

6. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method as described in any one of claims 1-3.

Images