Automatic control method and system for online cutting of glass wool

Abstract

The application provides an automatic control method and system for online cutting of glass wool, and belongs to the technical field of glass wool processing. In view of the problems that the cutting equipment in the prior art cannot consider thickness uniformity and operation safety, has low automation degree, depends on manual adjustment and is difficult to adapt to online continuous production requirements, the application realizes digital and automatic precise control of the whole process from thickness measurement to cutting execution through integration of laser ranging, automatic calculation of layered thickness, high-precision closed-loop positioning, intelligent anti-collision motion control, real-time deviation correction of saw blades, cutting and conveying speed cooperation and whole-process man-machine interactive monitoring. The application improves the consistency of the thickness of the multi-layer product after cutting, cutting precision and product quality, improves production efficiency and stability of the cutting process, and reduces manual operation intensity and dependence on skilled workers.

Description

Technical Field

[0001] This invention relates to the field of glass wool processing technology, and in particular to an automatic control method and system for online glass wool slitting. Background Technology

[0002] Glass wool, as a high-performance thermal insulation and sound-absorbing material, is experiencing continuously growing demand in energy-saving and noise-reduction applications in construction, industrial equipment, and transportation. With the increasing standards for green buildings and stricter industrial energy conservation requirements, the market is placing higher demands on the performance consistency, dimensional accuracy, and production efficiency of glass wool products. Especially in prefabricated buildings, cleanrooms, and pipe insulation, wide-format, continuously produced glass wool products often require online layering and slitting to meet order demands for different thicknesses. Therefore, developing high-precision, highly automated online slitting technology and equipment that can dynamically adapt to material thickness fluctuations has become an important direction for enhancing the added value of glass wool products and strengthening the industry's competitiveness.

[0003] However, currently widely used glass wool slitting equipment still has significant limitations. Most equipment uses a fixed or semi-mechanical adjustable slitting structure, which cannot perform real-time thickness detection and dynamic tracking of the glass wool during movement. This results in uneven thickness of each layer of the slitting product, affecting the quality and performance of the finished product. The positioning of the slitting device relies heavily on manual experience and mechanical rulers, resulting in low adjustment accuracy and slow response, making it difficult to achieve precise control down to the millimeter level. At the same time, traditional equipment lacks an effective real-time correction and tension control mechanism during saw blade operation, which can easily lead to uneven cut surfaces or even belt breakage and machine shutdown due to saw blade deviation, vibration, or loosening. In addition, the upper and lower slitting saws lack automatic anti-collision protection during adjustment, posing a risk of equipment interference and insufficient operational safety. These defects make it difficult for existing technology to meet the comprehensive requirements of high-speed continuous production for thickness consistency, processing stability, and operational safety, thus hindering the further development of glass wool products towards higher precision and higher efficiency.

[0004] Therefore, there is an urgent need in the existing technology for an automatic control method and system for online cutting of glass wool with higher precision. Summary of the Invention

[0005] To address these issues, the present invention provides an online automatic control method and system for slitting glass wool, which overcomes the problems of uneven thickness of each layer of the product after slitting, affecting the quality and performance of the finished product; the positioning of the slitting device relying heavily on manual experience and mechanical rulers, resulting in low adjustment accuracy and slow response; and the lack of automatic anti-collision protection for the upper and lower slitting saws during the adjustment process, posing a risk of equipment interference and insufficient operational safety.

[0006] To achieve the above objectives, the present invention provides an automatic control method for online slitting of glass wool, comprising: S1, the target glass wool is transported to the cutting area by horizontal conveying, and the speed of horizontal conveying is collected; S2, use a laser rangefinder to detect the thickness of the target glass wool and collect thickness data; S3, determine the target thickness of each layer of glass wool according to the target requirements, and determine the target positioning position of the annular band saw blade in the slitting device; S4, based on the target thickness of each layer of glass wool, drive the upper and lower cutting devices to move along the longitudinal bearing slides via the lead screw bearing; S5: The position data of the slitting device is collected in real time through a rotary encoder, and the position of the slitting device is adjusted based on historical thickness data; S6, after the slitting device moves to the target positioning position, it drives the annular band saw blade to slit the target glass wool, and at the same time adjusts the slitting speed based on the speed of the horizontal conveyor. S7: During the slitting process, the running status of the annular band saw blade is monitored in real time, and the correction action is automatically started when deviation occurs; the real-time thickness data of the target glass wool is continuously collected by the laser rangefinder, and the position of the slitting device is adjusted according to the real-time thickness data; The S8 displays the product thickness, slitting device position, and equipment operating status in real time through the HMI during the slitting process. It also provides a manual operation window for parameter setting and start / stop control through the HMI until the target glass wool is slitting is completed.

[0007] Furthermore, in S4, the position of the slitting device is adjusted based on the anti-collision mechanism, specifically including: If the current position of the cutting device is lower than the target positioning position, then the cutting device located above will be driven to move upward along the longitudinal bearing slide. If the current position of the cutting device is higher than the target positioning position, then the cutting device located below will be driven to move downward along the longitudinal bearing slide. If the current cutting device is located at the target positioning position, then obtain and determine whether the relative distance between the upper and lower cutting devices is greater than the preset safe distance threshold. If the relative distance is less than or equal to a preset safe distance threshold, then return to S3 to redetermine the target location.

[0008] Furthermore, in S3, the target thickness is the ratio of the thickness data to the target number of layers, and the target positioning position of the annular band saw blade in the upper and lower cutting devices is calculated based on the ratio.

[0009] Furthermore, the step of acquiring the position data of the slitting device in real time through a rotary encoder and adjusting the position of the slitting device based on historical thickness data includes: S51 uses a high-precision rotary encoder installed at the input end of the lead screw bearing to collect real-time position data of the slitting device. S52, compare the real-time position data with the target positioning position. If there is a deviation, generate control commands through the PID adjustment algorithm to adjust the movement of the lead screw bearing until there is no deviation between the real-time position data and the target positioning position. S53, Obtain historical thickness data of glass wool obtained by the cutting device performing cutting at the target positioning position; S54, compare the historical thickness data of the glass wool with the target thickness. If the historical thickness data of the glass wool is different from the target thickness, it is determined that the rotary encoder has malfunctioned. S55, after replacing the rotary encoder, return to S51 and readjust the position of the slitting device.

[0010] Furthermore, the adjustment of the slitting speed based on the horizontal conveying speed includes: S61 obtains the horizontal conveying speed through a roller-type rotary encoder mounted on the glass wool surface; S62, based on the matching relationship between the horizontal conveying speed and the cutting speed, the target saw blade operating speed is calculated. S63, send a control command to the servo motor that drives the annular band saw blade to adjust the saw blade speed to the target saw blade speed so that the glass wool feed speed is synchronized with the slitting speed.

[0011] Furthermore, the correction action is completed by the photoelectric correction sensor and the correction execution mechanism. The photoelectric correction sensor monitors the offset of the annular band saw blade relative to the set trajectory in real time. When the offset exceeds the preset offset threshold, the correction execution mechanism is controlled to drive the guide wheel to apply a lateral thrust to the saw blade, so that the saw blade returns to the set trajectory.

[0012] Furthermore, the slitting device includes two steel rotating wheels, and the annular band saw blade is fitted onto the two rotating wheels to form a closed loop. A tensioning force of 0.8MPa to 1.2MPa is applied to the saw blade by a hydraulic tensioning cylinder. One of the rotating wheels serves as the driving wheel and is driven by a servo motor to make the saw blade rotate at a speed of 500rpm to 2000rpm.

[0013] Furthermore, the parameter setting window provided by the HMI allows operators to set parameters including the target thickness deviation range of each layer of product after slitting, the safety distance threshold between the upper and lower slitting devices, the horizontal conveying speed, the saw blade operating speed, and the preset offset threshold.

[0014] This invention also provides an online automatic slitting control system for glass wool, used to implement any of the online automatic slitting control methods for glass wool described above, the system comprising: The horizontal conveying module is used to transport the target glass wool to the cutting area via horizontal conveying and to collect the speed of horizontal conveying. A thickness acquisition module, connected to the horizontal conveying module, is used to detect the thickness of the target glass wool using a laser rangefinder and acquire thickness data. The calculation and planning module, connected to the thickness acquisition module, is used to determine the target thickness of each layer of glass wool according to the target requirements, and to determine the target positioning position of the annular band saw blade in the cutting device. The positioning drive module, connected to the calculation and planning module, is used to drive the upper and lower cutting devices to move along the longitudinal bearing slides respectively through the lead screw bearing, based on the target thickness of each layer of glass wool. The closed-loop adjustment module, connected to the positioning drive module, is used to collect the position data of the slitting device in real time through the rotary encoder and adjust the position of the slitting device based on historical thickness data. The slitting execution module is connected to the closed-loop adjustment module. It is used to drive the annular band saw blade to slit the target glass wool after the slitting device moves to the target positioning position, and at the same time adjust the slitting speed based on the speed of the horizontal conveyor. The monitoring and correction module is connected to the cutting execution module. It is used to monitor the running status of the annular band saw blade in real time during the cutting process and automatically start the correction action when deviation occurs. It continuously collects the real-time thickness data of the target glass wool through a laser rangefinder and adjusts the position of the cutting device according to the real-time thickness data. The human-machine interface module, connected to the monitoring and correction module, is used to display the product thickness, cutting device position, and equipment operating status in real time during the cutting process via HMI, and to provide a manual operation window for parameter setting and start / stop control via HMI until the target glass wool is cut.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Firstly, this invention solves the core problem of uneven product thickness and poor quality consistency in traditional slitting processes, which are caused by the inability to sense material thickness online and reliance on manual experience for setting parameters. It establishes an integrated control system encompassing real-time laser thickness measurement, automatic layer calculation, and high-precision closed-loop positioning. This invention uses a non-contact laser rangefinder as the sensing starting point, automatically and accurately calculating the target thickness of each layer and the positioning height of the slitting saw based on real-time thickness data. Furthermore, it utilizes a servo screw and rotary encoder combined with a PID algorithm to achieve sub-millimeter-level positioning closed-loop control, thereby elevating the thickness consistency of the slitting products to a new level and significantly improving the processing accuracy and quality pass rate. Secondly, this invention solves the key problems of collision risk and insufficient operational safety in high-speed vertical cutting devices during dynamic adjustment and operation by introducing and strictly implementing intelligent anti-collision decision-making logic and real-time safe distance monitoring. This invention embeds the rule of "upward movement precedes upward sawing" and "downward movement precedes downward sawing" into the control logic, and continuously calculates and verifies the distance between the upper and lower saws throughout the entire movement process to ensure that it is always greater than the preset safety threshold. This fundamentally prevents equipment accidents, greatly improves the inherent safety of automated production processes, and reduces the risk of equipment damage and maintenance costs. Thirdly, by deeply integrating functional modules such as thickness adaptation, speed coordination, real-time deviation correction, status monitoring, and human-machine interaction, the entire process from material feeding to slitting completion is digitalized, automated, and precisely controlled. This invention comprehensively solves the systemic problems of traditional production methods, which rely on manual labor, are inefficient, have delayed adjustments, and suffer from large quality fluctuations. It not only significantly reduces manual intervention and improves production efficiency and equipment utilization, but also achieves standardized, flexible, and intelligent production through data-driven process control and visual monitoring, stably and efficiently meeting the production needs of high-quality, large-scale online slitting of glass wool. Attached Figure Description

[0016] Figure 1 A flowchart of an online automatic control method for cutting glass wool is provided in an embodiment of the present invention; Figure 2 This is a structural block diagram of an online automatic control system for glass wool provided in an embodiment of the present invention. Detailed Implementation

[0017] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0018] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0019] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0020] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] Example 1 like Figure 1 As shown, the present invention provides an automatic control method for online slitting of glass wool, comprising: S1, the target glass wool is transported to the cutting area by horizontal conveying, and the speed of horizontal conveying is collected; In one possible implementation, the horizontal conveying system consists of a variable frequency geared motor, a drive chain, several sets of transfer rollers, and a tensioning mechanism. The surface of the transfer rollers is covered with a rubber layer to prevent scratching the glass wool surface and to enhance friction. The variable frequency geared motor is started, stopped, and speed-controlled by a PLC control system, enabling stepless adjustment of the conveying speed within the range of 0.1 m / s to 1.0 m / s. At startup, the operator sets the initial conveying speed to 0.5 m / s via the HMI. The PLC sends a start command to the variable frequency geared motor, which drives the transfer rollers to rotate via chain drive, smoothly introducing the continuous glass wool product from the previous process into the conveyor line. The actual operating speed is obtained by a rotary encoder rolling on the glass wool surface, adjusting the conveying speed to ensure the glass wool product moves at a uniform speed horizontally. After being positioned by guide rollers, it enters the centering and positioning section before the slitting area.

[0022] During the conveying process, the tensioning mechanism maintains the chain and conveyor belt at a moderate tension to prevent slippage or deviation. Photoelectric sensors are installed on both sides of the conveyor line to detect the edge position of the glass wool; if deviation occurs, an alarm will sound in real time and adjustments will be prompted.

[0023] When the front end of the glass wool reaches the positioning sensor at the entrance of the slitting area, the sensor sends a signal to the PLC. Based on this signal, the PLC determines that the glass wool has entered the slitting preparation state and proceeds to the subsequent thickness detection and slitting control process.

[0024] S2, use a laser rangefinder to detect the thickness of the target glass wool and collect thickness data; In one possible implementation, the laser rangefinder uses an LMS-200 non-contact laser displacement sensor with a maximum measurement range of 200 mm and a linear accuracy of ±0.05 mm within a 100 mm range, meeting the high-precision detection requirements for common glass wool thickness ranges. It is fixedly installed above the entrance of the slitting area using a dedicated bracket, with its laser emitter vertically downwards aligned with the upper surface of the glass wool product on the conveyor line. The installation height can be adjusted according to the product thickness range to ensure that the measuring spot is always focused on the product surface.

[0025] The laser rangefinder is connected to the PLC control system via an RS-485 communication interface and uses the Modbus RTU protocol for data transmission. The PLC sends a data acquisition command to the laser rangefinder at regular intervals, for example, every 100 milliseconds. After receiving the command, the sensor emits a laser and receives the reflected signal. It calculates the distance from the sensor's reference plane to the upper surface of the glass wool using the phase difference or time-of-flight method, and sends this distance value as raw data to the PLC.

[0026] In actual testing, once the glass wool front end triggers the detection start signal via the positioning sensor, the PLC immediately starts the laser rangefinder for continuous measurement. To improve the stability and anti-interference capability of the measurement results, the system employs a dynamic moving average filtering algorithm: during each acquisition, the laser rangefinder continuously samples 5 times within 10 milliseconds. The PLC then removes the maximum and minimum values ​​from the 5 samples and takes the arithmetic mean as the effective thickness measurement value at that sampling moment. This value, combined with the pre-calibrated conveyor roller height reference (i.e., the lower surface position of the glass wool), allows for the calculation of the real-time total thickness H of the glass wool product.

[0027] For example, if the laser rangefinder measures the distance between itself and the upper surface of the glass wool as L1, and the roller height reference value is L0 (fixed and known), then the current glass wool thickness H = L0 - L1. The PLC stores this thickness data along with a timestamp in the data buffer and simultaneously transmits it to the subsequent thickness analysis and cutting position calculation modules. During the cutting process, the laser rangefinder continues to work, enabling online real-time monitoring of the glass wool thickness and providing data for possible thickness fluctuations and dynamic adjustments.

[0028] This invention uses a non-contact laser rangefinder to perform real-time, continuous, and high-precision online detection of the thickness of glass wool products. This solves the problems of traditional contact measurement methods, such as surface damage caused by mechanical contact, measurement lag, and decreased accuracy due to wear. It improves the accuracy and real-time performance of thickness data, providing a reliable basis for subsequent slitting position calculation and dynamic adjustment. This enhances the thickness consistency of the final slitting products and reduces slitting deviations and material waste caused by inaccurate thickness detection.

[0029] S3, determine the target thickness of each layer of glass wool according to the target requirements, and determine the target positioning position of the annular band saw blade in the slitting device; In S3, the target thickness is the ratio of the thickness data to the target number of layers, and the target positioning position of the annular band saw blade in the upper and lower cutting devices is calculated based on the ratio.

[0030] The slitting device includes two steel rotating wheels. An upper slitting saw and a lower slitting saw are slidably mounted on the outside of a longitudinal slide rail. The upper slitting saw includes a sliding sleeve slidably mounted on the outside of the longitudinal slide rail, and a square tube fixedly connected to its side wall. A positioning wheel is rotatably connected to the side wall of the sliding sleeve, and an adjusting wheel is slidably mounted on the side wall of the square tube. A saw blade, in the shape of a ring, is rotatably connected to the outside of the positioning wheel and the adjusting wheel. The positioning wheel and the adjusting wheel form a U-shaped transmission structure. During sawing, the rotation of the wheels drives the saw blade, eliminating the need for back-and-forth pulling like a conventional saw. The side of the positioning wheel is fixed through the side wall of the sliding sleeve. The device is connected to beveled teeth, and a motor is fixedly installed on the side wall of the sliding sleeve. The output end of the motor passes through the side wall of the sliding sleeve and is fixedly connected to the beveled teeth. The beveled teeth mesh with each other, and the motor drives the rotating wheel to rotate to achieve the sawing action, so that the saw blade runs at a speed of 500rpm to 2000rpm. The lower slitting saw has the same structure as the upper slitting saw, and the lower slitting saw is slidably installed outside the longitudinal slide and located below the upper slitting saw. The upper and lower slitting saws work together to achieve horizontal cutting of glass wool. The device is equipped with two high-precision rotary encoders to record the position of the upper and lower slitting saws in real time to ensure accurate positioning of the cutting height.

[0031] In one possible implementation, the target requirement mainly refers to the number of cutting layers preset by the operator through the HMI. In this embodiment, taking the uniform cutting of glass wool products into three layers as an example, the target number of layers n=3.

[0032] The PLC control system receives the actual total thickness H of the glass wool product collected and processed by the laser rangefinder in step S2. Based on the preset target number of layers n=3, and following the principle of uniform cutting and consistent thickness of each layer, it directly calculates the target thickness of each layer of glass wool as 50mm.

[0033] Calculating the target positioning position of the annular band saw blade requires establishing a spatial positioning reference system. In this embodiment, the upper surface of the conveyor line's carrying roller, i.e., the lower surface of the glass wool product, is used as the reference plane, with a height set to 0.

[0034] According to the slitting process requirements, the upper slitting saw is responsible for cutting the first and second layers, while the lower slitting saw is responsible for cutting the second and third layers. Therefore, the target positioning height of the lower slitting saw should be equal to the thickness of the first layer measured from the reference plane, and the target positioning height of the upper slitting saw should be equal to the total thickness of the first and second layers measured from the reference plane. The calculated target positioning height for the lower slitting saw is 50mm, and for the upper slitting saw it is 100mm. This means that the tip of the ring saw blade of the lower slitting saw should be positioned at a height of 50mm from the reference plane, and the upper slitting saw should be positioned at a height of 100mm.

[0035] Before the final output of the target positioning position, the PLC control system will call the anti-collision control module to perform a safety check and calculate the target relative distance between the upper and lower cutting saws. In this embodiment, the target relative distance between the upper and lower cutting saws is 50mm. The target relative distance between the upper and lower cutting saws is compared with the preset safety distance threshold, such as 15mm. If it is greater than the preset safety distance threshold, it will be output.

[0036] By automatically calculating the target thickness of each layer and the positioning height of the slitting saw based on the ratio of thickness data to the target number of layers, the problem of low efficiency and difficulty in ensuring the consistency of thickness of each layer in traditional slitting is solved. By integrating anti-collision safety verification logic, the risk of equipment interference is eliminated in advance during the positioning calculation stage, which improves the automation level and operational safety of slitting position setting, and reduces the probability of uneven product thickness and equipment collision caused by human calculation errors or negligence.

[0037] S4, based on the target thickness of each layer of glass wool, drive the upper and lower cutting devices to move along the longitudinal bearing slides via the lead screw bearing; In S4, the position of the slitting device is adjusted based on the anti-collision mechanism, specifically including: If the current position of the cutting device is lower than the target positioning position, then the cutting device located above will be driven to move upward along the longitudinal bearing slide. If the current position of the cutting device is higher than the target positioning position, then the cutting device located below will be driven to move downward along the longitudinal bearing slide. If the current cutting device is located at the target positioning position, then obtain and determine whether the relative distance between the upper and lower cutting devices is greater than the preset safe distance threshold. If the relative distance is less than or equal to a preset safe distance threshold, then return to S3 to redetermine the target location.

[0038] In one possible implementation, the total thickness of the glass wool product is 150.0 mm, and the target number of cutting layers is 3, so the target thickness of each layer is 50.0 mm. Therefore, the target positioning height of the upper cutting saw is determined to be 100 mm, and the target positioning height of the lower cutting saw is 50 mm. The preset safety distance threshold is 15 mm. The initial positions of the upper and lower cutting saws are determined by feedback from a high-precision rotary encoder, indicating that the current height of the upper saw is 80 mm and the current height of the lower saw is 30 mm. The motion control module within the programmable logic controller (PLC) executes the drive according to the following logical sequence: Compare the initial and target positions of each slitting saw: For the upward saw, the initial height is 80.0 mm < the target height is 100.0 mm, so it needs to move upwards.

[0039] When sawing downwards, with an initial height of 30.0 mm less than the target height of 50.0 mm, it is necessary to move upwards.

[0040] Currently, both the upper and lower saws are below their respective targets. Therefore, the decision is to first drive the upper slitting saw upward to its target position, and then drive the lower slitting saw upward after it has reached its target position and stopped.

[0041] The PLC sends pulse commands to the servo driver corresponding to the upper slitting saw, driving the servo motor to rotate. The motor drives a high-precision ball screw through a coupling, and the nut mechanism of the ball screw drives the entire upper slitting saw to move smoothly upward along a vertically mounted linear guide rail, i.e., the longitudinal bearing slide. A high-precision rotary encoder installed at the input end of the screw provides real-time feedback on the rotation angle. The PLC calculates the real-time height of the upper saw based on this. The PLC continuously compares this real-time height with the target height of 100.0 mm, and uses a proportional-integral-derivative (PID) control algorithm to dynamically adjust the motor speed until the upper saw moves precisely to the target height, with the error controlled within ±0.1 mm. Then, the drive of the upper saw is stopped.

[0042] After confirming that the upper saw is in position and stationary, the PLC starts driving the lower slitting saw. The control process is the same as driving the upper saw. The goal is to move the lower saw to a height of 50.0 mm. During the upward movement of the lower saw, the PLC calculates the relative distance between the upper and lower saws in real time: real-time distance = real-time height of the upper saw - real-time height of the lower saw. As long as this real-time distance is greater than the safety threshold of 15.0 mm, the movement will continue. If the system predicts or calculates that continued movement will cause the real-time distance to be less than or equal to the safety threshold, the PLC will immediately stop the lower saw movement and trigger an emergency stop alarm to prevent collision.

[0043] Once both the upper and lower saws have moved to their target positions, the PLC performs a final safety check, calculating the final relative distance. The final relative distance is 50.0 mm, which is greater than the preset safety distance threshold. The check passes, and the system is ready to enter the slitting stage.

[0044] If the calculated target position is unreasonable due to incorrect parameter settings, for example, if the upper saw target height is 53.0 mm and the lower saw target height is 50.0 mm, the final distance will be only 3.0 mm, which is less than the preset safe distance threshold. In this case, the PLC will trigger an alarm and return to S3 according to the control flow to re-determine the target positioning position. At the same time, the operator will be prompted on the human-machine interface (HMI) to check the input parameters or the cutting plan.

[0045] This invention solves the major safety hazard of potential mechanical collisions in high-speed, close-range relative motion of the upper and lower cutting devices by integrating intelligent anti-collision decision logic and real-time distance monitoring. Traditional equipment relies on manual observation or simple limit switches, which cannot cope with the complex situations in dynamic adjustments. This invention uses a PLC to automatically determine the direction of motion, enforces the rule of moving the upper or lower saw first, and continuously calculates and verifies the safety distance throughout the entire process, thereby proactively preventing collision risks. This significantly improves the inherent safety and reliability of equipment operation and reduces the probability of equipment damage and production interruption. By employing a closed-loop position control system composed of high-precision ball screw bearings, servo drives, and rotary encoders, it solves the problems of rough positioning, reliance on manual adjustment, and poor repeatability in traditional slitting devices. It directly converts the calculated value of the slitting thickness into high-precision linear displacement commands and provides real-time feedback correction, enabling the final positioning accuracy of the slitting saw to reach the ±0.1 mm level. This greatly improves the accuracy of execution on the target product thickness and provides crucial mechanical motion assurance for obtaining slitting products with uniform thickness. By deeply integrating motion sequence control, real-time position feedback, and safety logic verification into the automated process, it solves the problems of low efficiency, reliance on skilled workers, and cumbersome adjustment processes in traditional operations. It significantly shortens the preparation time after changing product specifications, improves equipment utilization, and reduces the skill and experience requirements of operators, achieving rapid production response and standardized operation.

[0046] S5, uses a rotary encoder to collect position data of the slitting device in real time, and adjusts the position of the slitting device based on historical thickness data, including: S51 uses a high-precision rotary encoder installed at the input end of the lead screw bearing to collect real-time position data of the slitting device. S52, compare the real-time position data with the target positioning position. If there is a deviation, generate control commands through the PID adjustment algorithm to adjust the movement of the lead screw bearing until there is no deviation between the real-time position data and the target positioning position. S53, Obtain historical thickness data of glass wool obtained by the cutting device performing cutting at the target positioning position; S54, compare the historical thickness data of the glass wool with the target thickness. If the historical thickness data of the glass wool is different from the target thickness, it is determined that the rotary encoder has malfunctioned. S55, after replacing the rotary encoder, return to S51 and readjust the position of the slitting device.

[0047] In one possible implementation, the drive mechanisms of both the upper and lower slitting saws are high-precision ball screws. Each screw's input end, i.e., the servo motor shaft end, is equipped with a high-precision rotary encoder. In this embodiment, an incremental encoder with a resolution of 1024 pulses per revolution is selected.

[0048] When the PLC sends a drive command to the servo driver to start the slitting saw moving, for example, driving the upper slitting saw to move from 80.0 mm to 100.0 mm, the rotary encoder mounted on the corresponding servo motor shaft starts working synchronously. The encoder converts the rotation angle of the servo motor into a high-speed pulse signal output. The PLC counts these pulses through a high-speed counting module and calculates the real-time position data of the slitting saw based on the encoder resolution and the lead screw lead. For example, the current height of the upper saw is 95.3 mm, and the data is updated at a cycle of no less than 10 milliseconds.

[0049] The PLC compares the acquired real-time position data with the target positioning position in real time, calculates the position deviation as 4.7mm, and inputs the position deviation value into the built-in PID adjustment algorithm module. The PID algorithm comprehensively calculates control commands for adjusting the servo motor speed and direction based on the current deviation, the historical cumulative deviation (integral term), and the rate of change of the deviation (derivative term), typically pulse frequency and direction signals. The PLC sends this control command to the servo driver, which adjusts the motor speed accordingly. For example, under PID control, the motor may initially run at a higher speed, automatically decelerating as it approaches the target position to achieve smooth and precise positioning. This process continues, with continuous encoder feedback and the PLC continuously comparing and adjusting until the deviation between the real-time position data and the target positioning position falls within the allowable error range, for example, set to ±0.1mm. At this point, the PLC determines that there is no position deviation, stops sending motion commands to the servo driver, and the slitting saw locks at the target position.

[0050] After the slitting saw completes the slitting of the glass wool at the target position, the downstream quality inspection station will measure the thickness of the slitted middle layer glass wool product to obtain historical thickness data of the glass wool. For example, if the actual thickness of the slitted single layer is measured to be 51.5 mm, this measurement data is fed back to the PLC control system through sensors or manual input and stored in a designated data storage area, associated with the target parameters of this slitting.

[0051] The PLC calls the comparison logic to compare the historical thickness data with the target thickness of this slitting. A preset allowable thickness deviation threshold is set, such as 0.5 mm. If the difference between the historical thickness and the target thickness is greater than the allowable thickness deviation threshold, it is determined that the actual slitting product thickness deviates significantly from the target.

[0052] After ruling out process factors such as sudden changes in raw material thickness and saw blade wear, the system points to the core feedback element of the actuator as the cause of this anomaly. Given that the S52 closed-loop adjustment has been completed, the PLC logic infers that while the position closed-loop control itself is not reporting errors, the inaccurate final product thickness is most likely due to a fault in the rotary encoder used for position feedback, such as inaccuracy, missed steps, or damage. This causes the feedback position data to be inconsistent with the actual mechanical position of the slitting saw, resulting in the failure of precise positioning. Based on this, the rotary encoder is determined to be faulty, and a clear fault alarm message is issued through the human-machine interface (HMI), indicating a suspected fault in the slitting saw's rotary encoder and inaccurate positioning.

[0053] Based on the alarm prompts, maintenance personnel inspect, test, or replace the designated rotary encoder, and the control flow returns to S51. The PLC will re-drive the slitting saw and collect position data through the new encoder, then execute the closed-loop adjustment process of S51-S52 again to ensure that the slitting saw position is recalibrated to the target positioning position based on the correct feedback information.

[0054] This invention solves the problems of inaccurate positioning and susceptibility to disturbances in slitting devices during operation by employing a high-precision rotary encoder combined with a PID closed-loop control algorithm. This technology achieves millisecond-level real-time acquisition and dynamic correction of the slitting saw position, continuously eliminating transmission errors and external interference, and stably controlling the final positioning accuracy at the sub-millimeter level. This ensures the precision of the slitting thickness from the execution end, improving the product thickness pass rate and consistency. By introducing a reverse diagnostic mechanism based on historical slitting thickness data, it solves the problem of traditional position control systems' difficulty in proactively detecting the failure of core sensors, improving the early detection capability of hidden equipment faults and reducing the risk of large-scale quality losses due to sensor inaccuracies. Furthermore, by establishing a standardized fault diagnosis and recovery process, it solves the problems of difficult fault location and long processing cycles in equipment maintenance, increasing the average repair time of the equipment and reducing the complexity of maintenance and reliance on highly skilled technicians.

[0055] S6, after the slitting device moves to the target positioning position, it drives the annular band saw blade to slit the target glass wool, and at the same time adjusts the slitting speed based on the speed of the horizontal conveyor. Adjusting the slitting speed based on the horizontal conveyor speed includes: S61 obtains the horizontal conveying speed through a roller-type rotary encoder mounted on the glass wool surface; S62, based on the matching relationship between the horizontal conveying speed and the cutting speed, the target saw blade operating speed is calculated. S63, send a control command to the servo motor that drives the annular band saw blade to adjust the saw blade speed to the target saw blade speed so that the glass wool feed speed is synchronized with the slitting speed.

[0056] In one possible implementation, the upper and lower slitting saws are precisely positioned at the target height, and the horizontal conveying system is started and running at a certain initial speed, for example, a set horizontal conveying speed of 0.3 m / s. The PLC control system prepares to start the annular band saw blade for slitting according to process requirements. To ensure a flat cut surface and avoid material pulling or accumulation, the saw blade speed must be matched with the current horizontal conveying speed. Specifically, horizontal conveying is achieved by a belt conveyor, with the upper slitting saw positioned above the conveyor belt's transport plane and the lower slitting saw positioned below it. Before the glass wool product is conveyed to the slitting position, the drive assembly can pre-adjust the upper and lower slitting saws to the preset slitting position, and the slitting operation begins immediately upon product arrival.

[0057] In this embodiment, the rotary encoder on the product serves as a speed acquisition component, acquiring the bus speed in real time and transmitting it to the control PLC. For example, the PLC reads that the current conveying speed is 0.3 m / s and uses it as the real-time conveying speed.

[0058] The PLC has a pre-stored calculation model for the matching relationship between the conveyor speed and the saw blade speed. The core of this model is an adjustable cutting efficiency coefficient K, usually determined through process experiments, for example, K=0.03. This establishes the proportional relationship between the product feed speed (i.e., the horizontal conveyor speed) and the saw blade linear speed. According to this model, the saw blade linear speed should equal the conveyor speed divided by K. Given the diameter of the drive wheel, for example, D=200 mm, the saw blade linear speed can be converted into the target rotational speed of the drive wheel.

[0059] The target saw blade linear velocity is calculated using a matching model: Target saw blade linear velocity = Current conveyor speed / K = 0.3 m / s / 0.03 = 10 m / s. Then, based on the diameter of the drive wheel, the target rotational speed is calculated as: Target rotational speed = (Target linear velocity × 60) / (π × D) ≈ 955 rpm.

[0060] Based on the calculated target rotational speed, the PLC sends a speed setting command to the servo drive that powers the upper and lower slitting saw's drive wheels. Upon receiving the command, the servo drive adjusts the motor speed, smoothly accelerating the saw blade from its stationary or standby speed to the target speed. The PLC continuously monitors the actual rotational speed feedback from the servo drive to ensure the saw blade's operating speed remains stable near the target value, thereby achieving synchronization between the slitting speed and the glass wool feed speed.

[0061] During continuous slitting, if the horizontal conveyor speed is adjusted due to process requirements, such as increasing the conveyor speed to 0.5m / s to improve production capacity, the PLC will repeat the above process in real time, dynamically recalculate and adjust the saw blade operating speed, and always maintain the best matching relationship between the two.

[0062] This invention solves the problems of rough cut surfaces, glass wool fiber tearing, or damage caused by mismatch between feed speed and cutting speed during slitting by establishing and executing a calculation model for the matching relationship between conveyor speed and saw blade rotation speed. The system can automatically and accurately calculate the optimal saw blade rotation speed based on the real-time conveyor speed of the horizontal conveyor system, ensuring precise coordination between material feeding and cutting actions in time and space. This significantly improves the smoothness of the slitting surface and product quality, and reduces the scrap rate caused by speed mismatch. By acquiring the horizontal conveyor speed in real time and dynamically adjusting the saw blade rotation speed, it solves the problem that the traditional fixed speed ratio mode cannot adapt to changes in different slitting process parameters. This method enables the equipment to automatically match cutting parameters according to the actual production cycle, improving adaptability and production flexibility to different product specifications and process requirements, without requiring cumbersome mechanical speed adjustments during downtime. By ensuring synchronization between the slitting speed and the conveyor speed, it indirectly optimizes the equipment's operating load, solving problems such as abnormal saw blade wear, drive motor overload, or uneven stress on the transmission system caused by speed asynchrony. This dynamic matching mechanism based on conveying speed reduces the impact load on various parts of the equipment, helps extend the service life of the saw blade, drive motor and transmission mechanism, and reduces the frequency of equipment maintenance and operating costs.

[0063] S7: During the slitting process, the running status of the annular band saw blade is monitored in real time, and the correction action is automatically started when deviation occurs; the real-time thickness data of the target glass wool is continuously collected by the laser rangefinder, and the position of the slitting device is adjusted according to the real-time thickness data; The correction action is completed by the photoelectric correction sensor and the correction actuator. The photoelectric correction sensor monitors the offset of the annular band saw blade relative to the set trajectory in real time. When the offset exceeds the preset offset threshold, the correction actuator is controlled to drive the guide wheel to apply a lateral thrust to the saw blade, so that the saw blade returns to the set trajectory.

[0064] In one possible implementation, after step S6 is completed—that is, the slitting saw is positioned, the saw blade is running at high speed, and the horizontal conveyor speed is synchronized—the glass wool product begins to be continuously and stably slitted into three layers. During this process, the two core monitoring and adjustment functions defined in step S7 are activated simultaneously to ensure the continuous stability of the slitting quality.

[0065] Specifically, each slitting unit is equipped with a photoelectric correction sensor and a correction actuator. The photoelectric correction sensor is installed on one side of the circular band saw blade's running path, and its emitted beam is aligned with a fixed reference point on the edge of the saw blade, such as a marking line on the back of the saw blade or a specific structural edge. The photosensitive element inside the sensor detects the position where the beam is reflected or blocked by the edge of the saw blade.

[0066] The sensor converts the detected edge position signal into a voltage signal and transmits it to the PLC control system in real time. The PLC compares the received real-time position signal with a pre-calibrated and stored reference signal for the set trajectory, and calculates the real-time offset of the saw blade relative to the set trajectory, for example, an offset of 0.12 mm to the left. The system has a preset offset threshold, for example, 0.10 mm. If the absolute value of the real-time offset is less than the preset offset threshold, it is considered normal fluctuation; if the absolute value of the real-time offset is greater than or equal to the preset offset threshold, it is determined that an offset has occurred, and correction needs to be initiated.

[0067] The PLC immediately sends an action command to the corresponding correction actuator, typically a small linear cylinder controlled by a solenoid valve or a push rod driven by a servo motor. The correction actuator then drives a guide wheel to move rapidly. For example, when the saw blade deviates to the right, the guide wheel applies a controllable, brief lateral thrust to the saw blade from the left. This lateral thrust forces the saw blade to slide slightly laterally on the rotating wheel, thus returning it to the correct set trajectory. The photoelectric correction sensor provides continuous feedback, and the PLC controls the magnitude and duration of the correction force based on the feedback signal until the deviation returns to within the threshold, forming a rapid correction closed loop. This process can be completed in milliseconds to seconds, ensuring the straightness of the cutting trajectory.

[0068] The laser rangefinder located above the entrance of the slitting area does not stop working after step S2. Instead, it maintains a periodic or continuous triggering mode throughout the slitting process, continuously measuring the distance between the upper surface of the glass wool product and its own reference surface during transport. Combined with the fixed roller reference height, it calculates the instantaneous total thickness of the glass wool in real time and continuously sends the data stream to the PLC. The PLC's built-in control logic, such as the moving average algorithm, processes the continuous thickness data stream to smooth instantaneous fluctuations and identify meaningful thickness change trends. For example, the system may detect that the glass wool thickness gradually increases from an initial 150.0 mm to 152.0 mm within a few seconds and stabilizes near that value, exceeding the preset process thickness fluctuation tolerance range.

[0069] Once the PLC confirms that the product thickness has changed stably and significantly, it will immediately re-execute a calculation similar to S3 based on the new total thickness. Under the premise of ensuring that the anti-collision safety distance is met, the PLC sends a fine-tuning command to the servo driver of the upper and lower moving device, driving the upper and lower cutting saws to move from their original positions to the new target positions respectively. The adjustment process also follows the closed-loop control logic of S4 and S5 to achieve precise and stable online dynamic adjustment.

[0070] This invention solves the problems of uneven cutting surfaces, product edge defects, or dimensional deviations caused by the deviation of the annular band saw blade during the slitting process by employing a real-time monitoring and rapid response system composed of a photoelectric correction sensor and an actuator. This ensures the absolute straightness and stability of the cutting trajectory, significantly improving the edge quality and dimensional accuracy of the slitting products and reducing the defective and rework rates caused by saw blade deviation. Furthermore, by continuously collecting thickness data throughout the slitting process using a laser rangefinder and driving dynamic fine-tuning of the slitting device, it addresses the issue of the gradual deviation of the slitting product thickness from the set value due to fluctuations or gradual changes in the thickness of the glass wool raw material itself. The goal is to achieve online sensing and automatic compensation for thickness fluctuations, enabling the slitting position to adaptively adjust according to changes in raw materials. This ensures that even with fluctuations in raw materials, the thickness of each layer of the final product remains strictly consistent, greatly improving product thickness uniformity. Through continuous process monitoring and automatic adjustment, early warning of potential equipment failures and continuous optimization of process stability are indirectly achieved. This solves the problems of hidden quality losses and the difficulty in detecting gradual decline in equipment performance, reduces unplanned downtime, extends the life of key components, and promotes the development of a more stable and lean production process.

[0071] The S8 displays the product thickness, slitting device position, and equipment operating status in real time through the HMI during the slitting process. It also provides a manual operation window for parameter setting and start / stop control through the HMI until the target glass wool is slitting is completed.

[0072] The parameter setting window provided by the HMI allows operators to set parameters including the target thickness deviation range of each layer of product after slitting, the safety distance threshold between the upper and lower slitting devices, the horizontal conveyor speed, the saw blade operating speed, and the preset offset threshold.

[0073] In one possible implementation, the human-machine interface (HMI) is the core terminal for operators to interact with the automatic online glass wool slitting control system and issue commands. In this embodiment, the HMI uses a 10.4-inch industrial touchscreen that communicates with the programmable logic controller (PLC) in real time via Ethernet. Its main functions are divided into two parts: real-time visual monitoring of the production process status and manual setting of production parameters and equipment control.

[0074] During the automatic cutting process, the HMI main interface dynamically updates and displays the following key information until the current batch of glass wool is completely cut: Real-time thickness detection displays the latest total thickness of the glass wool product collected and processed by the laser rangefinder. The current target single-layer thickness is displayed, showing the target value for each layer calculated based on the real-time total thickness and the preset number of layers; The thickness variation curve, displayed as a trend chart, shows the fluctuation of product thickness over a recent period, allowing operators to have a macroscopic understanding of raw material stability. The real-time height of the upper cutting saw is displayed in the form of a numerical value and a simulated slider; the former is the actual value, and the latter is the target value. The real-time height of the lower slitting saw is displayed in the same way as above. The safe distance between the upper and lower saws is calculated and displayed in real time, and is indicated by color: green indicates that it is greater than the safe threshold, and red indicates that it is less than the threshold. The transmission system displays the start / stop status and current conveying speed. The slitting system displays the operation / stop of the upper and lower saw blades, real-time speed, and saw blade correction status such as normal or in correction. The hydraulic system displays the saw blade tension pressure. Overall status indicator lights: use prominent colors to indicate the overall status such as running, standby, alarm, emergency stop, etc.

[0075] When situations such as excessive saw blade offset, sudden thickness change, insufficient safety distance, or sensor failure occur, a prominent alarm window will pop up on the interface, displaying the alarm code, detailed description, and handling suggestions.

[0076] Operators can access a password-protected settings interface by touching the "Parameter Settings" button on the HMI main interface. Within this window, the following key process and control parameters can be preset or modified: Quality-related parameters define the allowable tolerance for the thickness of each layer of the product after slicing. For example, it can be set to 0.5mm. When the target thickness deviation of a single layer calculated by the system exceeds this range, the HMI will issue a warning but will not necessarily stop the machine. This parameter is mainly used for quality monitoring and early warning. The safety distance threshold, which sets the minimum absolute distance allowed between the upper and lower cutting devices, is a core parameter of the anti-collision logic. For example, it is set to 15.0mm, and any adjustment must ensure that the distance is greater than this value. The preset offset threshold sets the maximum allowable deviation of the annular band saw blade. Exceeding this value will trigger automatic correction. For example, it can be set to 0.10mm. The horizontal conveying speed reference value is set as the initial matching speed reference value of the conveying system during the slitting process, and will be finely adjusted around this reference according to the model; The saw blade operating speed is set by adjusting the rotation speed of the drive wheel of the slitting saw. Other parameters include advanced parameters such as laser rangefinder sampling frequency, PID adjustment parameters, and correction response speed.

[0077] HMI provides intuitive control buttons or virtual switches to enable the following manual operations: Start / stop control includes system start, system stop, and emergency stop buttons. After pressing the system start button, the equipment will execute the automated process from S1 to S7.

[0078] Mode selection allows switching between automatic and manual modes. In manual mode, the operator can individually control the conveyor, lifting saw, and start the saw blade for maintenance and debugging. Task management: Input or select product specifications and plan length to manage production tasks; Alarm confirmation and reset: After the fault is cleared, the operator must confirm the alarm and reset it on the HMI in order to restore normal operation.

[0079] This invention achieves real-time centralized display and visual monitoring of end-to-end data through HMI, solving the problems of black-box operation, opaque status, and reliance on operator experience in traditional equipment. It improves the ability to instantly perceive production status and the speed of early detection of anomalies, reducing misjudgments and response delays caused by poor information flow, and enhancing the precision of production management. By providing an integrated parameter setting window through HMI, it solves the cumbersome and inefficient problems of multiple mechanical adjustments or complex programming modifications required during equipment debugging and specification switching, significantly shortening preparation time for product changeovers and improving equipment utilization and market responsiveness. Furthermore, by automatically recording operating data, process parameters, and alarm events through HMI, it solves the problems of difficult quality traceability and lack of data support for process analysis and optimization during production, promoting the transformation of production management from experience-driven to data-driven, contributing to lean production and predictive maintenance, and continuously improving overall production efficiency and product quality.

[0080] Example 2 like Figure 2 As shown, the present invention also provides an online automatic slitting control system for glass wool, the system being used to implement the online automatic slitting control method for glass wool described in any of Embodiment 1, the system comprising: The horizontal conveying module is used to transport the target glass wool to the cutting area via horizontal conveying and to collect the speed of horizontal conveying. A thickness acquisition module, connected to the horizontal conveying module, is used to detect the thickness of the target glass wool using a laser rangefinder and acquire thickness data. The calculation and planning module, connected to the thickness acquisition module, is used to determine the target thickness of each layer of glass wool according to the target requirements, and to determine the target positioning position of the annular band saw blade in the cutting device. The positioning drive module, connected to the calculation and planning module, is used to drive the upper and lower cutting devices to move along the longitudinal bearing slides respectively through the lead screw bearing, based on the target thickness of each layer of glass wool. The closed-loop adjustment module, connected to the positioning drive module, is used to collect the position data of the slitting device in real time through the rotary encoder and adjust the position of the slitting device based on historical thickness data. The slitting execution module is connected to the closed-loop adjustment module. It is used to drive the annular band saw blade to slit the target glass wool after the slitting device moves to the target positioning position, and at the same time adjust the slitting speed based on the speed of the horizontal conveyor. The monitoring and correction module is connected to the cutting execution module. It is used to monitor the running status of the annular band saw blade in real time during the cutting process and automatically start the correction action when deviation occurs. It continuously collects the real-time thickness data of the target glass wool through a laser rangefinder and adjusts the position of the cutting device according to the real-time thickness data. The human-machine interface module, connected to the monitoring and correction module, is used to display the product thickness, cutting device position, and equipment operating status in real time during the cutting process via HMI, and to provide a manual operation window for parameter setting and start / stop control via HMI until the target glass wool is cut.

[0081] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. An automatic control method for online slitting of glass wool, characterized in that, include: S1, the target glass wool is transported to the cutting area by horizontal conveying, and the speed of horizontal conveying is collected; S2, use a laser rangefinder to detect the thickness of the target glass wool and collect thickness data; S3, determine the target thickness of each layer of glass wool according to the target requirements, and determine the target positioning position of the annular band saw blade in the slitting device; S4, based on the target thickness of each layer of glass wool, drive the upper and lower cutting devices to move along the longitudinal bearing slides via the lead screw bearing; S5: The position data of the slitting device is collected in real time through a rotary encoder, and the position of the slitting device is adjusted based on historical thickness data; S6, after the slitting device moves to the target positioning position, it drives the annular band saw blade to slit the target glass wool, and at the same time adjusts the slitting speed based on the speed of the horizontal conveyor. S7: During the slitting process, the running status of the annular band saw blade is monitored in real time, and the correction action is automatically started when deviation occurs; the real-time thickness data of the target glass wool is continuously collected by the laser rangefinder, and the position of the slitting device is adjusted according to the real-time thickness data; The S8 displays the product thickness, slitting device position, and equipment operating status in real time through the HMI during the slitting process. It also provides a manual operation window for parameter setting and start / stop control through the HMI until the target glass wool is slitting is completed.

2. The automatic control method for online slitting of glass wool according to claim 1, characterized in that, In S4, the position of the slitting device is adjusted based on the anti-collision mechanism, specifically including: If the current position of the cutting device is lower than the target positioning position, then the cutting device located above will be driven to move upward along the longitudinal bearing slide. If the current position of the cutting device is higher than the target positioning position, then the cutting device located below will be driven to move downward along the longitudinal bearing slide. If the current cutting device is located at the target positioning position, then obtain and determine whether the relative distance between the upper and lower cutting devices is greater than the preset safe distance threshold. If the relative distance is less than or equal to a preset safe distance threshold, then return to S3 to redetermine the target location.

3. The automatic control method for online slitting of glass wool according to claim 1, characterized in that, In S3, the target thickness is the ratio of the thickness data to the target number of layers, and the target positioning position of the annular band saw blade in the upper and lower cutting devices is calculated based on the ratio.

4. The automatic control method for online slitting of glass wool according to claim 1, characterized in that, The step of acquiring position data of the slitting device in real time through a rotary encoder and adjusting the position of the slitting device based on historical thickness data includes: S51 uses a high-precision rotary encoder installed at the input end of the lead screw bearing to collect real-time position data of the slitting device. S52, compare the real-time position data with the target positioning position. If there is a deviation, generate control commands through the PID adjustment algorithm to adjust the movement of the lead screw bearing until there is no deviation between the real-time position data and the target positioning position. S53, Obtain historical thickness data of glass wool obtained by the cutting device performing cutting at the target positioning position; S54, compare the historical thickness data of the glass wool with the target thickness. If the historical thickness data of the glass wool is different from the target thickness, it is determined that the rotary encoder has malfunctioned. S55, after replacing the rotary encoder, return to S51 and readjust the position of the slitting device.

5. The automatic control method for online slitting of glass wool according to claim 1, characterized in that, The method of adjusting the cutting speed based on the horizontal conveying speed includes: S61 obtains the horizontal conveying speed through a roller-type rotary encoder mounted on the glass wool surface; S62, based on the matching relationship between the horizontal conveying speed and the cutting speed, the target saw blade operating speed is calculated. S63, send a control command to the servo motor that drives the annular band saw blade to adjust the saw blade speed to the target saw blade speed so that the glass wool feed speed is synchronized with the slitting speed.

6. The automatic control method for online slitting of glass wool according to claim 1, characterized in that, The correction action is completed by the photoelectric correction sensor and the correction execution mechanism. The photoelectric correction sensor monitors the offset of the annular band saw blade relative to the set trajectory in real time. When the offset exceeds the preset offset threshold, the correction execution mechanism is controlled to drive the guide wheel to apply a lateral thrust to the saw blade, so that the saw blade returns to the set trajectory.

7. The automatic control method for online slitting of glass wool according to claim 1, characterized in that, The slitting device includes two steel rotating wheels. The annular band saw blade is fitted onto the two rotating wheels to form a closed loop, and a tensioning force of 0.8MPa to 1.2MPa is applied to the saw blade by a hydraulic tensioning cylinder. One of the rotating wheels serves as the drive wheel and is driven by a servo motor to make the saw blade rotate at a speed of 500rpm to 2000rpm.

8. The automatic control method for online slitting of glass wool according to claim 1, characterized in that, The parameter setting window provided by the HMI allows operators to set or display parameters including the target thickness deviation range of each layer of product after slitting, the safety distance threshold between the upper and lower slitting devices, the horizontal conveyor speed, the saw blade operating speed, and the preset offset threshold.

9. An automatic control system for online slitting of glass wool, characterized in that, The system is used to implement the automatic control method for online slitting of glass wool according to any one of claims 1 to 8, and the system includes: The horizontal conveying module is used to transport the target glass wool to the cutting area via horizontal conveying and to collect the speed of horizontal conveying. A thickness acquisition module, connected to the horizontal conveying module, is used to detect the thickness of the target glass wool using a laser rangefinder and acquire thickness data. The calculation and planning module, connected to the thickness acquisition module, is used to determine the target thickness of each layer of glass wool according to the target requirements, and to determine the target positioning position of the annular band saw blade in the cutting device. The positioning drive module, connected to the calculation and planning module, is used to drive the upper and lower cutting devices to move along the longitudinal bearing slides respectively through the lead screw bearing, based on the target thickness of each layer of glass wool. The closed-loop adjustment module, connected to the positioning drive module, is used to collect the position data of the slitting device in real time through the rotary encoder and adjust the position of the slitting device based on historical thickness data. The slitting execution module is connected to the closed-loop adjustment module. It is used to drive the annular band saw blade to slit the target glass wool after the slitting device moves to the target positioning position, and at the same time adjust the slitting speed based on the speed of the horizontal conveyor. The monitoring and correction module is connected to the cutting execution module. It is used to monitor the running status of the annular band saw blade in real time during the cutting process and automatically start the correction action when deviation occurs. It continuously collects the real-time thickness data of the target glass wool through a laser rangefinder and adjusts the position of the cutting device according to the real-time thickness data. The human-machine interface module, connected to the monitoring and correction module, is used to display the product thickness, cutting device position, and equipment operating status in real time during the cutting process via HMI, and to provide a manual operation window for parameter setting and start / stop control via HMI until the target glass wool is cut.

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