Aluminum foil high-precision intelligent slitting method and device based on online tension and rolling diameter cooperative control

Abstract

The invention relates to the technical field of aluminum foil slitting, and discloses an aluminum foil high-precision intelligent slitting method and device based on online tension and rolling diameter cooperative control. The invention aims to solve the problems of belt breakage, notch burrs and winding defects caused by large tension fluctuation, lagging of winding diameter calculation and passive shearing in the existing aluminum foil slitting technology. High-precision digital control of the whole process is achieved, the influence of system disturbance on the ultra-thin aluminum foil is effectively eliminated, and the slitting speed, the notch flatness and the structural stability of a finished coiled material are remarkably improved. The core of the method is that a precise tension model is constructed through laser scanning and inertia identification in the starting stage, and constant tension control under the dynamic rolling diameter is achieved through a double-ring strategy in the operation process; a vacuum adsorption isolation technology is innovatively introduced to cut off tension coupling, and a cutter is matched for overspeed active shearing to optimize the trimming quality; and the rolling end adopts a taper tension and flattening strategy that the rolling diameter and the speed are cooperatively adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aluminum foil slitting, in particular to an aluminum foil high-precision intelligent slitting method and device based on online tension and roll diameter collaborative control. BACKGROUND

[0002] As an important industrial base material, aluminum foil is widely used in high-end manufacturing fields such as new energy battery current collector, electronic capacitor, high-barrier soft packaging, and aerospace heat shielding screen, due to its excellent barrier property, thermal conductivity, electromagnetic shielding property, and lightweight characteristics. In particular, in the power battery and precision electronics industry, ultra-thin aluminum foil (such as double-zero foil and battery aluminum foil) has become a mainstream trend. Such aluminum foil not only requires extremely high thickness uniformity and surface cleanliness, but also has extremely strict standards for mechanical property maintenance during subsequent processing. It is an indispensable key link in the modern precision industrial chain.

[0003] However, in the slitting and rewinding process in the later stage of aluminum foil production, the existing slitting equipment generally faces the bottleneck of insufficient control accuracy. Since the aluminum foil material is extremely thin and has extremely low ductility, it is extremely sensitive to tension fluctuations. Traditional equipment simply relies on sensor feedback or simple open-loop control, which often cannot cope with the sudden change of nonlinear moment of inertia caused by roll diameter changes, and is extremely prone to cause the aluminum foil to be instantly pulled apart or to produce irreversible plastic deformation during high-speed operation. In addition, the existing passive mechanical shearing method is prone to burrs, flanging, and even aluminum powder accumulation at the cutting edge, which seriously affects the electrochemical performance or sealing performance of downstream products; and in the rewinding process, constant pressure or single taper control set by experience alone often cannot adapt to the aerodynamic effect under high-speed winding, resulting in quality defects such as air pocket, end face layering, or internal stress collapse in the finished product roll, which is difficult to meet the precision manufacturing requirements of high-end aluminum foil products. SUMMARY

[0004] In view of the above existing problems, the present application is proposed.

[0005] Therefore, the present application provides an aluminum foil high-precision intelligent slitting method and device based on online tension and roll diameter collaborative control, which solves the problems of broken belt, cutting burr, and rewinding defects caused by large tension fluctuations, roll diameter calculation lag, and passive shearing in the existing aluminum foil slitting technology.

[0006] To solve the above technical problems, the present application provides the following technical solutions: The present application provides an aluminum foil high-precision intelligent slitting method based on online tension and roll diameter collaborative control, which includes the following steps, S1: in response to the slitting start instruction, obtaining the initial geometric parameters of the aluminum mother roll through the laser detection assembly, driving the motor to perform a micro exploratory action to inversely calculate the initial moment of inertia, constructing a global tension control model based on the geometric parameters and the moment of inertia, and performing a static pre-tensioning operation to eliminate the aluminum foil slack; S2: during the unwinding process, continuously collecting the traction line speed and the motor angular speed, cyclically calculating the current dynamic roll diameter value, generating a feedforward torque instruction based on the dynamic roll diameter value, and combining the online feedback data of the tension sensor to perform closed-loop correction to maintain the constant tension output on the unwinding side; S3: introducing the output aluminum foil into the vacuum adsorption buffer unit, using the negative pressure adsorption force to lock the aluminum foil on the steady roller surface to isolate the tension fluctuations on the unwinding side and the winding side, and driving the slitting knife group to perform active shearing on the aluminum foil at a preset overspeed synchronization ratio in the isolation state; S4: based on the continuously updated winding roll diameter, performing a nonlinear taper tension control strategy to adjust the winding torque, and according to the winding roll diameter and the current line speed, cooperatively adjusting the contact pressure of the flattening roller to exclude interlayer air until a task completion signal is monitored.

[0007] As a preferred scheme of the aluminum foil high-precision intelligent slitting method based on online tension and roll diameter cooperative control, wherein: the process of inversely calculating the initial moment of inertia in step S1 specifically includes: The controller sends a group of test pulse instructions containing acceleration and deceleration segments to the unwinding motor, drives the unwinding motor to drive the aluminum mother roll to perform reciprocating micro-motion within a range without generating actual unwinding displacement; high-frequency acquisition of the output torque current value and the corresponding angular acceleration response value of the unwinding motor during the micro-motion; Subtracting the known no-load friction loss torque of the system from the collected torque current value to obtain the effective net torque for driving the load; comparing and analyzing the effective net torque and the angular acceleration response value to extract the proportional coefficient therebetween as the numerical value of the initial moment of inertia of the aluminum mother roll.

[0008] As a preferred scheme of the aluminum foil high-precision intelligent slitting method based on online tension and roll diameter cooperative control, wherein: the process of constructing a global tension control model in step S1 specifically includes: The controller first reads the material attribute parameters of the aluminum foil, establishes a dynamic mapping table associated with roll diameter change, moment of inertia attenuation and target tension based on the initial moment of inertia and the initial geometric parameters; based on the dynamic mapping table, a unwinding tension reference curve is generated which dynamically adjusts with the roll diameter and sets the basic tension value that the unwinding motor should output at different roll diameter nodes; The tension deviation allowable range is determined according to the allowable tensile strength of the aluminum foil material and the slitting process precision requirement, and the tension deviation allowable range is defined as an error threshold band triggering closed-loop feedback regulation.

[0009] As a preferred scheme of the aluminum foil high-precision intelligent slitting method based on online tension and roll diameter collaborative control, in the step S2, the process of cyclically calculating the dynamic roll diameter value specifically includes: During the rotation of the unwinding shaft, the number of pulses of the traction roller encoder and the number of pulses of the unwinding motor encoder are synchronously accumulated within a time sampling period; The number of pulses of the traction roller is converted into a linear displacement increment of the aluminum foil, and the number of pulses of the unwinding motor is converted into an angular displacement increment of the unwinding shaft; the ratio of the linear displacement increment to the angular displacement increment is calculated as an original roll diameter original value of the current sampling period; The original roll diameter original values of a plurality of continuous sampling periods are smoothed to eliminate abnormal data caused by aluminum foil jumping, and an effective dynamic roll diameter value used for control calculation is obtained.

[0010] As a preferred scheme of the aluminum foil high-precision intelligent slitting method based on online tension and roll diameter collaborative control, in the step S2, the process of generating a feedforward torque instruction and performing closed-loop correction specifically includes: According to the effective dynamic roll diameter value updated in real time, a basic open-loop torque required to overcome the current moment of inertia and mechanical friction is calculated as a feedforward torque instruction combined with the tension reference curve and directly sent to the unwinding motor; the actual tension value fed back by the tension sensor is synchronously monitored, and a deviation amount of the actual tension value from the target tension value is calculated; After detecting that the deviation amount exceeds the error threshold band, a compensation torque instruction is generated according to the size and direction of the deviation amount; the compensation torque instruction is superimposed on the feedforward torque instruction, and the output torque of the unwinding motor is dynamically adjusted until the deviation amount returns to the error threshold band.

[0011] As a preferred scheme of the aluminum foil high-precision intelligent slitting method based on online tension and roll diameter collaborative control, in the step S3, the process of isolating tension fluctuation by the vacuum adsorption buffer unit specifically includes: A negative pressure generating device connected to the inside of the buffer roller is started, and the adsorption pressure value at the micro-pore of the roller surface is detected; After confirming that the adsorption pressure value reaches a locking threshold value sufficient to overcome the tangential slip force of the aluminum foil, the aluminum foil is tightly adsorbed on the surface of the buffer roller; The rotational linear speed of the buffer roller is set as the speed master reference of the whole slitting system, the aluminum foil input on the unwinding side and the aluminum foil output on the winding side are forced to keep speed synchronization when passing through the buffer roller, and the transmission of tension fluctuation on the unwinding side to the winding side is blocked through the vacuum adsorption node.

[0012] As a preferred scheme of the aluminum foil high-precision intelligent slitting method based on online tension and roll diameter collaborative control, in the step S3, the process of driving the slitting cutter group to perform active shearing specifically includes: The target linear speed of the slitting cutter is calculated according to a preset overspeed proportion coefficient, with the linear speed of the aluminum foil passing through the buffer roller as the reference; The slitting cutter shaft driving motor is controlled to continuously rotate at the target linear speed, so that the linear speed of the cutting edge of the slitting cutter is always higher than the moving speed of the aluminum foil during the whole shearing operation; The tensioning effect on the aluminum foil is formed in the shearing area by the continuously existing speed difference, so that the aluminum foil is cut off in a tensioned state, and the tearing or flanging of the cut caused by material relaxation is avoided.

[0013] As a preferred scheme of the aluminum foil high-precision intelligent slitting method based on online tension and roll diameter collaborative control, in the step S4, the process of adjusting the contact pressure of the flattening roller specifically includes: During the winding process, the controller continuously monitors the current winding roll diameter and the linear speed of the aluminum foil, and dynamically adjusts the opening of the pneumatic proportional valve according to the winding roll diameter and the linear speed; After monitoring that the winding roll diameter increases, the pneumatic proportional valve is driven to perform a pressure reduction action, so that the contact pressure of the flattening roller on the surface of the aluminum foil roll decreases nonlinearly with the increase of the roll diameter, to avoid crushing the inner layer of aluminum foil; After monitoring that the linear speed increases, the pneumatic proportional valve is driven to perform a pressure compensation action, so that the contact pressure of the flattening roller increases correspondingly with the increase of the speed, to press out the air that tries to enter the interlayer due to high-speed winding; The controller superimposes the pressure reduction adjustment amount based on the roll diameter and the pressure compensation amount based on the speed in real time, and outputs the final pressure control instruction, to ensure that the hardness of the finished product roll is consistent throughout the process.

[0014] The application also provides an aluminum foil high-precision intelligent slitting system based on online tension and roll diameter collaborative control, which is used to execute the above method and specifically includes the following modules: The physical parameter acquisition module is used to drive the laser detection assembly to scan the aluminum master roll in the starting stage, to acquire initial geometric parameters; The inertia dynamic identification module is used to control the unwinding motor to perform a micro-motion test, to collect torque and acceleration data for back calculation of the initial rotational inertia; A tension model construction module is configured to establish a dynamic mapping table and a reference curve of the associated roll diameter and the tension based on the initial geometric parameters and the moment of inertia; A dynamic roll diameter calculation module is configured to cyclically collect the speed and position signals during the unwinding operation, calculate and output the filtered effective dynamic roll diameter value; A double-loop tension adjustment module is configured to generate a feedforward instruction in combination with the effective dynamic roll diameter value and generate a closed-loop compensation instruction by using tension feedback to control the unwinding motor; A vacuum adsorption isolation module is configured to monitor the negative pressure state of the buffer unit and set the buffer roller speed to the system speed reference after the adsorption lock is established; A synchronous active shearing module is configured to calculate a target overspeed value according to the system speed reference and drive the slitting cutter group to implement active tensile shearing on the aluminum foil; A taper tension generation module is configured to control the output torque of the winding motor according to a non-linear decreasing strategy based on the real-time winding roll diameter; A pressure cooperative compensation module is configured to dynamically adjust the contact pressure of the flattening roller according to the changes of the winding roll diameter and the running line speed.

[0015] The application also provides an aluminum foil high-precision intelligent slitting device based on online tension and roll diameter cooperative control, which is used for executing the above method and serving as a carrier of the above system, and specifically comprises: A slitting unit, which comprises unwinding rollers, traction rollers, adsorption rollers, slitting rollers and winding rollers fixedly installed on the top of the base in sequence, the adsorption rollers are coaxially provided with a containing cavity inside, the adsorption rollers are provided with adsorption holes communicating with the containing cavities, and the adsorption rollers are provided with a suction pipe coaxially arranged with the containing cavities and penetrating through the adsorption rollers, and the suction pipe is provided with a suction pipe; A detection unit, which comprises a negative pressure sensor arranged on the top of the adsorption roller and used for detecting the adsorption strength, and the traction rollers are integrated with a pressure-sensitive film capacitor used for measuring the pressure of the aluminum foil to calculate the tension, and the unwinding rollers are provided with an angle sensor arranged at the shaft joint of the unwinding rollers and the base and used for measuring the rotation angle of the roller body; A reference distance measuring sensor used for measuring the distance of the roller body and a winding distance measuring sensor used for measuring the distance of the aluminum master roll are fixedly installed on the base below the unwinding rollers, and the roll diameter of the aluminum master roll can be obtained by subtracting the distance measuring results of the two sensors and adding the radius of the roller body; A reference distance measuring sensor used for measuring the distance of the roller body and a winding distance measuring sensor used for measuring the distance of the aluminum roll after slitting are fixedly installed on the base below the winding rollers, and the winding roll diameter of the aluminum roll after slitting can be obtained by subtracting the distance measuring results of the two sensors and adding the radius of the roller body.

[0016] The present application has the beneficial effects that: through physical parameter measurement modeling, dynamic roll diameter real-time reconstruction and feedforward and feedback double-loop control strategy, the technical problems of aluminum foil being extremely thin and easy to break and tension fluctuation sensitive are solved, meanwhile, using vacuum adsorption isolation and ultra-speed active shearing technology, the edge quality defects caused by traditional passive slitting are eliminated, and high precision, high efficiency and high yield of aluminum foil slitting are realized.

[0017] In the starting stage, the inertia is calculated reversely by laser scanning and motor micro-motion, instead of traditional estimation or manual input method, which ensures the physical accuracy of the initial tension model and effectively avoids the aluminum foil breakage or wrinkling caused by model mismatch at the moment of starting. In the running process, through the double-loop control strategy, the tension response rapidity is ensured by roll diameter feedforward, and the interference caused by material unevenness is eliminated by closed-loop correction, realizing constant tension output in the whole speed range. Especially, the vacuum adsorption buffer unit is introduced, which physically builds a tension isolation wall, completely cutting off the tension coupling interference between unwinding and winding, cooperating with the active ultra-speed shearing of the slitting cutter, using the stretching effect caused by the small speed difference to ensure the smooth and burr-free edge of the cut. In addition, the roll diameter and speed double-dimensional coordinated flattening control used in the winding stage can dynamically adjust the contact pressure according to the roll diameter and speed, effectively eliminating the air at high speed winding while ensuring the tightness of the roll core, preventing air pocket and end face misalignment, and significantly improving the rewinding quality of the finished aluminum foil roll. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 The flow chart of the aluminum foil high-precision intelligent slitting method based on online tension and roll diameter coordinated control.

[0020] Figure 2 The initialization refinement flow chart.

[0021] Figure 3 The double-loop control refinement flow chart.

[0022] Figure 4 The system module data flow chart.

[0023] Figure 5 The overall view of the aluminum foil high-precision intelligent slitting device based on online tension and roll diameter coordinated control.

[0024] Figure 6 The rear view of the aluminum foil high-precision intelligent slitting device based on online tension and roll diameter coordinated control.

[0025] Figure 7 is a sectional view of the adsorption roller. DETAILED DESCRIPTION

[0026] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0027] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details given herein, that the present application can be practiced with other different systems, and that the present application can be practiced in other different ways. Therefore, the scope of the present application is indicated by the appended claims rather than by the specific embodiments disclosed below.

[0028] Secondly, one embodiment or embodiments referred to herein means that a specific feature, structure, or characteristic under discussion can be included in at least one implementation of the present application. Occurrences of the expressions one embodiment and one embodiment in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a single, alternative embodiment or feature.

[0029] Embodiment 1 Reference Figures 1-3 For one embodiment of the present application, the embodiment provides an aluminum foil high-precision intelligent slitting method based on online tension and roll diameter cooperative control, including the following steps: S1, in response to a slitting start instruction, obtaining initial geometric parameters of an aluminum master roll through a laser detection assembly, driving a motor to perform a micro exploratory action to inversely calculate an initial moment of inertia, constructing a global tension control model based on the geometric parameters and the moment of inertia, and performing a static pre-tensioning operation to eliminate aluminum foil slack; The initial moment of inertia is inversely calculated, the controller sends a group of test pulse instructions containing an acceleration segment and a deceleration segment to the unwinding motor, and drives the unwinding motor to drive the aluminum master roll to perform reciprocating micro-motion within a range without generating actual unwinding displacement; the output torque current value and the corresponding angular acceleration response value of the unwinding motor during micro-motion are collected at high frequency; The collected torque current value is subtracted by the known no-load friction loss torque of the system to obtain the effective net torque for driving the load; the effective net torque and the angular acceleration response value are compared and analyzed to extract the proportional coefficient therebetween as the numerical value of the initial moment of inertia of the current aluminum master roll; The global tension control model is constructed, the controller first reads the material attribute parameters of the aluminum foil, combines the initial moment of inertia and the initial geometric parameters, and establishes a dynamic mapping table associated with roll diameter change, moment of inertia attenuation and target tension; based on the dynamic mapping table, a unwinding tension reference curve is generated which is dynamically adjusted with the decrease of roll diameter and sets the basic tension value that the unwinding motor should output at different roll diameter nodes; The tension deviation allowable range is determined according to the allowable tensile strength of the aluminum foil material and the precision requirement of the slitting process, and is defined as an error threshold band triggering closed-loop feedback adjustment.

[0030] Wherein, after receiving the slitting start instruction, a laser ranging sensor installed at a fixed position of the unwinding rack is used to emit a measuring light beam to the surface of the static aluminum mother roll and the surface of the roller body, and the linear distance value from the sensor probe to the surface of the aluminum mother roll and the surface of the roller body is read. The actual thickness of the aluminum roll is obtained by subtracting the two, and the current physical radius value of the aluminum mother roll is obtained by adding the pre-stored radius of the roller body, which is used as the starting base for subsequent roll diameter calculation.

[0031] The controller sends a drive torque instruction with extremely short duration and constant amplitude to the unwinding motor to drive the aluminum mother roll to produce a small acceleration rotation within an angle range that does not produce effective unwinding displacement; during this period, the controller calculates the angular acceleration of the aluminum mother roll in unit time by collecting the pulse signals fed back by the motor encoder; the actual current value output by the motor driver at this moment is read synchronously and converted into electromagnetic torque; the electromagnetic torque is subtracted by the inherent mechanical friction torque measured and stored in the system under no-load state to obtain the net drive torque actually acting on the aluminum mother roll to overcome inertia; the ratio of the net drive torque to the measured angular acceleration is calculated as the initial rotational inertia of the aluminum mother roll.

[0032]

[0033] Wherein, represents the initial rotational inertia of the aluminum mother roll; represents the electromagnetic torque output by the motor driver; represents the inherent mechanical friction torque of the system under no-load state; represents the angular acceleration generated by the aluminum mother roll during measurement.

[0034] The controller reads the pre-stored density and width parameters of the aluminum foil material, combines the measured initial radius and initial rotational inertia, and deduces the numerical correspondence between roll diameter change and system total rotational inertia decay; based on the correspondence, the theoretical base torque required by the unwinding motor to maintain constant tension at each roll diameter node during the process of gradually reducing the roll diameter from the current initial value to the roll core diameter is pre-calculated, and this series of corresponding torque value points are linked into a roll unwinding tension reference curve that changes with the roll diameter.

[0035] According to the allowable tensile strength of the aluminum foil material and the slitting process precision requirement, a fixed numerical range is set as an error threshold band on and below the target value of the unwinding tension reference curve, which will be used as a logical criterion for determining whether to intervene in the feedback adjustment mechanism based on the deviation proportion, integral and differential in the subsequent operation; then, the controller drives the unwinding motor and the winding motor to slowly apply tension to tighten the aluminum foil, and when the value fed back by the tension sensor rises to the target value and is stably maintained within the error threshold band within the preset time window, it is determined that the pre-tensioning is completed and the aluminum foil relaxation is eliminated.

[0036] S2, during unwinding, continuously collecting the traction line speed and the motor angular speed, cyclically calculating the current dynamic roll diameter value, generating a feedforward torque instruction based on the dynamic roll diameter value, and performing closed-loop correction combined with the online feedback data of the tension sensor to maintain constant tension output on the unwinding side; Cyclically calculating the dynamic roll diameter value, synchronously accumulating the number of pulses of the traction roller encoder and the number of pulses of the unwinding motor encoder within a time sampling period during the rotation of the unwinding shaft; Converting the number of pulses of the traction roller into the linear displacement increment of the aluminum foil, and converting the number of pulses of the unwinding motor into the angular displacement increment of the unwinding shaft; calculating the ratio of the linear displacement increment to the angular displacement increment as the original roll diameter original value of the current sampling period; Smoothly processing the original roll diameter original values of a plurality of continuous sampling periods to eliminate abnormal data caused by aluminum foil jumping, and obtaining an effective dynamic roll diameter value for control calculation; Generating a feedforward torque instruction and performing closed-loop correction, calculating an open-loop basic torque required to overcome the current moment of inertia and mechanical friction as a feedforward torque instruction directly sent to the unwinding motor according to the real-time updated effective dynamic roll diameter value combined with the tension reference curve; synchronously monitoring the actual tension value fed back by the tension sensor, and calculating the deviation amount of the actual tension value from the target tension value; After detecting that the deviation amount exceeds the error threshold band, generating a compensation torque instruction according to the size and direction of the deviation amount; superimposing the compensation torque instruction on the feedforward torque instruction to dynamically adjust the output torque of the unwinding motor until the deviation amount returns to within the error threshold band.

[0037] Wherein, as the slitting operation starts, the diameter of the aluminum master roll will gradually decrease as the material is continuously output, which means that the physical characteristics of the system are changing at all times.

[0038] A very short time window is set as a sampling period during the continuous rotation of the unwinding shaft. At the end of each such period, the controller reads the number of pulses accumulated by the traction roller encoder and the number of pulses accumulated by the unwinding motor encoder.

[0039] With the diameter parameter of the traction roller known, the number of pulses of the traction roller is converted into the length actually traveled by the aluminum foil in this period of time, i.e. the linear displacement increment; the number of pulses of the unwinding motor is converted into the angle through which the unwinding shaft rotates, i.e. the angular displacement increment. By calculating the ratio of the two increments, the actual radius of the aluminum mother roll in the current state can be inversely calculated.

[0040]

[0041] wherein, represents the instantaneous roll radius at the current sampling time; represents the linear displacement increment in the sampling period; represents the angular displacement increment in the sampling period; represents the number of pulses accumulated by the traction roller encoder; represents the diameter of the traction roller; represents the resolution (number of lines) of the traction roller encoder; represents the number of pulses accumulated by the unwinding motor encoder; represents the resolution of the unwinding motor encoder.

[0042] In order to prevent the calculated number from being large or small due to equipment vibration or slight unevenness of the aluminum foil surface, the values calculated for several consecutive times need to be put together, the maximum and minimum values are removed, and the average value in the middle is taken, so as to obtain a smooth and stable effective dynamic roll radius value, which will be used as the core basis for subsequent control.

[0043] After calculating the real-time updated effective dynamic roll radius value, the tension model established previously will be immediately consulted. According to the current roll radius, it is calculated how much inertia is left in the aluminum mother roll at this moment, and combined with the current speed and friction, it is calculated how much force the motor should theoretically output to maintain the tension. This calculated force is used as the feedforward torque command and directly sent to the unwinding motor. It ensures that the tension is basically accurate without any interference.

[0044] However, there will always be interference in actual production (such as slight changes in the thickness of the aluminum foil). Therefore, it is also necessary to monitor the real-time data returned by the tension sensor in real time, and continuously calculate the difference between the actual tension and the target tension. If the difference is within the set error threshold band, it means that the current state does not need additional intervention; once it is found that the difference has run out of this range, closed-loop correction needs to be started, and a compensation torque is calculated according to the size and direction of the difference. Then the compensation torque is directly superimposed on the theoretical force, so that the motor outputs a little more or a little less force, until the tension is pulled back to within the error threshold band.

[0045] S3, the output aluminum foil is introduced into a vacuum adsorption buffer unit, and the aluminum foil is locked on the surface of the steady roller by the negative pressure adsorption force to isolate the tension fluctuation between the unwinding side and the winding side, and the slitting cutter group is driven to perform active shearing on the aluminum foil at a preset overspeed synchronization ratio; The vacuum adsorption buffer unit is used to isolate the tension fluctuation, and a negative pressure generating device connected to the inside of the buffer roller is started to detect the adsorption pressure value at the micro-holes on the surface of the roller; After confirming that the adsorption pressure value reaches a locking threshold value sufficient to overcome the tangential slip force of the aluminum foil, the aluminum foil is tightly adsorbed on the surface of the buffer roller; The linear speed of the rotation of the buffer roller is set as the main reference speed of the entire slitting system, and the aluminum foil input from the unwinding side and the aluminum foil output from the winding side are forced to keep speed synchronization when passing through the buffer roller, and the transmission of the tension fluctuation from the unwinding side to the winding side can be blocked by setting the vacuum adsorption node; The slitting cutter group is driven to perform active shearing, and the target linear speed of the slitting cutter is calculated according to the preset overspeed ratio coefficient based on the linear speed of the aluminum foil passing through the buffer roller; The slitting cutter shaft driving motor is controlled to continuously rotate at the target linear speed, so that the cutting edge of the slitting cutter always maintains a linear speed higher than the moving speed of the aluminum foil during the entire shearing operation; The tensioning effect on the aluminum foil is formed in the shearing area by the continuously existing speed difference, so that the aluminum foil is cut under the tensioning state, and the tearing or flanging of the cut caused by material relaxation is avoided.

[0046] When the aluminum foil is output from the unwinding side with constant tension, it must first pass through a key link of tension isolation and speed synchronization before entering the precise slitting area. The high-pressure centrifugal fan or vacuum pump connected to the internal air path of the vacuum adsorption buffer roller is activated to quickly establish a negative pressure environment in the internal chamber of the roller body. The precise micro-holes distributed on the surface of the roller form a strong centripetal adsorption force under the action of pressure difference. The adsorption pressure value at the micro-holes is monitored in real time by a pressure sensor, and compared with a preset locking threshold value. The locking threshold value is calculated based on the material friction coefficient and the maximum running tension of the aluminum foil, and is designed to ensure that the adsorption force is sufficient to completely overcome the tendency of the aluminum foil to slide or deviate tangentially on the surface of the roller.

[0047] When the monitored adsorption pressure value exceeds the locking threshold value stably, the aluminum foil is firmly locked on the surface of the buffer roller, and at this time the motion state of the aluminum foil is no longer disturbed by the tension fluctuation of the unwinding side, but is completely taken over by the physical rotation of the buffer roller. Then all other shafts of the entire production line (including traction, slitting, winding) need to follow the real-time linear speed of the buffer roller as the target. This forced synchronization mechanism based on physical adsorption blocks the transmission of possible residual tension fluctuation from the unwinding side to the high-precision slitting area, ensuring the absolute stability of the aluminum foil when entering the cutting edge.

[0048] Under the premise of ensuring the absolute stability of the aluminum foil feeding speed and the absence of micro-shaking, the running linear speed of the buffer roller serving as the main reference is collected in real time, and a preset overspeed ratio coefficient greater than 1 (usually set to between 1.03 and 1.05) is introduced. The controller multiplies the current running linear speed by the coefficient to calculate the target linear speed that the slitting cutter should theoretically have.

[0049] Then a speed instruction is sent to the servo motor driving the slitting cutter shaft, and the cutter shaft is controlled to continuously rotate at the target linear speed. In order to ensure that the cutting edge of the slitting cutter is always slightly higher than the moving speed of the aluminum foil when it contacts and cuts into the aluminum foil, a continuous speed difference is maintained, which generates an additional pulling force along the running direction on the aluminum foil in front of the cutting point at a micro level, forming a local tightening effect. In this tightened state, the aluminum foil material is cut off cleanly, effectively overcoming the elongation and rebound of the extremely thin aluminum foil under stress, thereby avoiding quality defects such as tear, edge turning, and aluminum powder accumulation caused by material relaxation or speed lag.

[0050] S4, based on the continuously updated winding diameter, a nonlinear taper tension control strategy is executed to adjust the winding torque, and according to the winding diameter and the current linear speed, the contact pressure of the flattening roller is dynamically adjusted to exclude interlayer air until a task completion signal is monitored; Adjusting the contact pressure of the flattening roller, the controller continuously monitors the current winding diameter and the aluminum foil running linear speed during the winding process, and dynamically adjusts the opening of the pneumatic proportional valve according to the winding diameter and the running linear speed; After monitoring the increase of the winding diameter, the pneumatic proportional valve is driven to perform a pressure reduction action, so that the contact pressure of the flattening roller on the surface of the aluminum foil roll decreases nonlinearly with the increase of the roll diameter, to avoid crushing the inner layer of aluminum foil; After monitoring the increase of the running linear speed, the pneumatic proportional valve is driven to perform a pressure compensation action, so that the contact pressure of the flattening roller increases correspondingly with the increase of the speed, to press out the air that tries to enter the interlayer due to high-speed winding; The controller superimposes the pressure reduction adjustment amount based on the roll diameter and the pressure compensation amount based on the speed in real time, outputs the final pressure control instruction, and ensures that the finished roll maintains consistent hardness throughout the process.

[0051] Among them, the slitted narrow aluminum foil enters the final winding and forming stage, and the control target of this stage is to build a finished roll material with stable structure and no internal stress damage in the dynamic process of continuously increasing roll diameter.

[0052] As the number of aluminum foil layers on the winding shaft increases, the roll diameter continues to grow. If a constant winding tension is maintained, the taut outer aluminum foil will exert enormous radial pressure on the inner layer, causing the inner foil to wrinkle and even deforming the core (commonly known as the "vegetable heart phenomenon"). The controller calculates the current winding diameter in real time and inputs it into a preset nonlinear attenuation model. This model stipulates that as the roll diameter increases, the torque output by the winding motor does not increase nonlinearly, but rather gradually decreases its unit tension value according to a specific curvature. This control method ensures an ideal stress distribution of tight inside and loose outside in the finished roll, guaranteeing the core's compactness while preventing excessive compression of the inner layer by the outer layer.

[0053]

[0054] in, Indicates the current volume diameter The target winding tension is below; This indicates the initial winding tension set. This represents the tension reduction rate coefficient (usually ranging from 0.1 to 0.3). Indicates the diameter of the winding core; This indicates the maximum winding diameter.

[0055] While controlling the tension, it is also necessary to coordinate the adjustment of the contact pressure of the flattening roller to solve the air entrainment problem during high-speed winding. Adjusting the contact pressure of the flattening roller is a dynamic balancing process affected by two variables. The controller needs to continuously monitor the current winding diameter and the linear speed of the aluminum foil, and adjust the opening of the pneumatic proportional valve connected to the flattening roller cylinder in real time based on these two parameters.

[0056] As the winding diameter gradually increases over time, the controller drives the pneumatic proportional valve to perform a pressure reduction action, causing the contact pressure applied by the flattening roller to the surface of the aluminum foil roll to decrease non-linearly with the increase of the roll diameter. This logic corresponds to the taper tension control, preventing the pressure from the flattening roller combined with the winding tension from causing excessive internal stress in the roll material as the roll diameter increases, which could damage the aluminum foil surface or cause interlayer adhesion.

[0057] When the production line speed is increased, the high-speed airflow forms an air film on the aluminum foil surface, attempting to be drawn into the interlayer to form air pockets or cause the coil to deviate. To counteract this air buoyancy effect, the controller drives the pneumatic proportional valve to perform a pressure compensation action, so that the contact pressure of the flattening roller increases accordingly with the speed, using greater mechanical pressure to force out the air attempting to enter the interlayer.

[0058] The controller performs real-time superposition calculations of the pressure reduction adjustment calculated based on the roll diameter and the pressure increase compensation calculated based on the speed, and outputs the final pressure control command.

[0059]

[0060] wherein, represents the final contact pressure command value of the flattening roller; represents the initial base pressure; represents the pressure decay coefficient based on the roll diameter; is the current winding roll diameter; represents the winding roll core diameter; represents the pressure compensation coefficient based on the linear speed; is the current aluminum foil running linear speed.

[0061] The flattening roller is driven throughout the winding process, always adhering to the surface of the winding material with optimal pressure, ensuring that the finished product roll can maintain uniform hardness and flat end face regardless of the size or speed of the winding diameter, until the set winding length or winding diameter reaches the target value, and a task completion signal is sent.

[0062] Embodiment 2 Referring to Figure 1 and Figure 4 , two embodiments of the present application, the embodiment provides an aluminum foil high-precision intelligent slitting system based on online tension and roll diameter cooperative control. The system is usually deployed on a high-performance computing server and is used to execute the method steps described in embodiment 1.

[0063] The software architecture of the system is composed of a group of highly coordinated functional modules, specifically including: A physical parameter acquisition module for driving a laser detection component to scan an aluminum master roll during the start-up phase to obtain initial geometric parameters; An inertia dynamic identification module for controlling the unwinding motor to perform a micro-motion test and collecting torque and acceleration data to inversely calculate the initial moment of inertia; A tension model construction module for establishing a dynamic mapping table and a reference curve relating roll diameter and tension based on the initial geometric parameters and the moment of inertia; A dynamic roll diameter solving module for cyclically collecting speed and position signals during unwinding operation, calculating and outputting filtered effective dynamic roll diameter values; A double-loop tension adjustment module for generating a feedforward command in combination with the effective dynamic roll diameter value and generating a closed-loop compensation command using tension feedback to control the unwinding motor; A vacuum adsorption isolation module for monitoring the negative pressure state of the buffer unit and setting the buffer roller speed to the system speed reference after establishing adsorption locking; A synchronous active shearing module for calculating a target overspeed value based on the system speed reference and driving the slitting knife group to actively stretch and shear the aluminum foil; A taper tension generation module for controlling the output torque of the winding motor according to a non-linear decreasing strategy based on the real-time winding roll diameter; A pressure coordination compensation module is used to dynamically adjust the contact pressure of the flattening roller according to the changes of the winding diameter and the running line speed.

[0064] In the system starting stage, the physical parameter acquisition module drives the laser ranging sensor to measure the distance of the static aluminum mother roll, and the accurate initial physical radius is obtained through geometric conversion; then, the inertia dynamic identification module controls the unwinding motor to perform a micro-amplitude torque excitation test, and the angular acceleration and current torque data in the micro-motion process are collected, and the initial rotational inertia of the system is calculated by using the dynamics principle. Based on the two measured physical benchmarks, the tension model construction module establishes a dynamic mapping table related to the change of the roll diameter, the inertia attenuation and the target tension, and generates a full-range unwinding tension reference curve, laying a data foundation for subsequent control.

[0065] After entering the running stage, the dynamic roll diameter solving module cyclically collects the line displacement of the traction roller and the angular displacement of the unwinding motor at a high frequency, and through comparison and calculation and combined with filtering processing, the smooth effective dynamic roll diameter value is output in real time. The value is transmitted to the double-loop tension regulation module to generate an open-loop feedforward torque instruction by table lookup; at the same time, the module also monitors the feedback deviation of the tension sensor in real time, generates a closed-loop compensation instruction by using the proportional, integral and differential adjustment based on the deviation, and drives the unwinding motor after superimposing the feedforward and feedback instructions, to maintain constant tension output.

[0066] In the slitting link, the vacuum adsorption isolation module monitors the negative pressure state of the buffer roller in real time, and once the stable adsorption locking is established, the buffer roller speed is set as the speed main reference of the full line, and the transmission of tension fluctuation is physically blocked. The synchronous active shearing module calculates and drives the slitting cutter group to rotate at a slight overspeed state following the speed reference, to implement active stretching shearing on the aluminum foil, and ensure the smoothness of the cut.

[0067] Finally, at the winding end, the taper tension generation module adjusts the output torque of the winding motor according to the real-time increasing winding diameter to prevent the inner layer from being deformed under pressure. At the same time, the pressure coordination compensation module comprehensively considers the dual influence of the increase of the roll diameter and the speed, dynamically calculates and outputs the pressure instruction to adjust the pneumatic proportional valve, controls the flattening roller to always adhere to the winding material at the optimal pressure, effectively removes the air between the layers, and ensures the hardness and flatness of the finished roll.

[0068] Embodiment 3 Reference Figure 5 With Figure 7 As three embodiments of the present application, the embodiment provides an aluminum foil high-precision intelligent slitting device based on online tension and roll diameter coordination control, which is used for slitting the aluminum foil 302 by installing various rollers on the base 301. The device is used to perform the method described in embodiment one, and serves as the slitting carrier of the system described in embodiment two.

[0069] Specifically comprising: The slitting unit 100 comprises a pay-off roller 101, a traction roller 102, a suction roller 103, a slitting roller 104 and a winding roller 105, which are fixedly installed on the top of the base 301 in sequence. The suction roller 103 is coaxially provided with a containing cavity 106 inside. The surface of the suction roller 103 is provided with a suction hole 107 communicating with the containing cavity 106. The suction roller 103 is provided with a suction pipe 108 coaxially arranged with the containing cavity 106. The suction pipe 108 is provided with a suction pipe 109. The detection unit 200 comprises a negative pressure sensor 201 arranged on the top of the suction roller 103 for detecting the suction strength. The surface of the traction roller 102 is integrated with a pressure-sensitive film capacitor 202 for measuring the pressure of the aluminum foil 302 to calculate the tension. The pay-off roller 101 is provided with an angle sensor 203 at the shaft joint with the base 301 for measuring the rotation angle of the roller body. The base 301 is fixedly installed with a reference distance measuring sensor 204a below the pay-off roller 101 for measuring the distance of the roller body, and a pay-off distance measuring sensor 204b for measuring the distance of the aluminum mother roll. The difference between the two distance measuring results is subtracted and the roller body radius is added to obtain the roll diameter of the aluminum mother roll. The base 301 is fixedly installed with a reference distance measuring sensor 204a below the winding roller 105 for measuring the distance of the roller body, and a winding distance measuring sensor 204c for measuring the distance of the aluminum roll after slitting. The difference between the two distance measuring results is subtracted and the roller body radius is added to obtain the winding roll diameter of the aluminum roll after slitting.

[0070] The pay-off roller 101 is rotatably installed on the top of the base 301 and is integrated with a high-precision angle sensor 203 at the shaft joint for real-time feedback of the rotation angle and angular velocity of the pay-off shaft. In order to obtain the initial roll diameter, a set of differential distance measuring components are installed on the base 301 below the pay-off roller 101. One is a reference distance measuring sensor 204a for directly measuring the distance of the pay-off roller body itself, and the other is a pay-off distance measuring sensor 204b for measuring the distance of the aluminum mother roll surface. At the start, the distance measuring results of the two are subtracted, and the known roller body radius is added to calculate the initial physical roll diameter of the aluminum mother roll eliminating the installation error.

[0071] The aluminum foil 302 is first passed through the traction roller 102 after being unwound from the unwinding roller 101. The surface-integrated pressure-sensitive film capacitor 202 can directly sense the contact pressure of the aluminum foil 302 on the roller surface, thereby real-time back-calculating the online tension value of the aluminum foil 302 to provide a sensitive feedback signal for the double-loop control. Subsequently, the aluminum foil 302 is closely attached to the adsorption roller 103. The adsorption roller 103 is internally designed with a hollow containing cavity 106, and the surface is densely covered with adsorption holes 107 communicating with the cavity. A coaxial suction pipe 108 is fitted with a suction pipe 109, and a negative pressure environment is established in the pipe body by a negative pressure generating device. The negative pressure sensor 201 located at the top of the adsorption roller 103 monitors the adsorption strength in real time, and once it is confirmed to be in a locked state, the adsorption roller 103 will use the strong pressure difference to adsorb the aluminum foil 302 firmly, not only establishing the speed reference of the system, but also physically isolating the tension fluctuation on the unwinding side.

[0072] The aluminum foil 302 that has been stably isolated is sent to the slitting roller 104, and the roller set is driven by an independent motor to actively stretch and shear the aluminum foil 302 at a slightly higher speed. The multiple narrow aluminum foils after slitting finally reach the winding roller 105. In order to accurately control the winding quality, a set of distance measuring components is also arranged below the winding roller 105, including the reference distance measuring sensor 204a and the winding distance measuring sensor 204c. The two work together to monitor the diameter change of the aluminum roll after slitting (i.e., the winding diameter). Based on this real-time roll diameter data, the system can not only perform taper tension control, but also cooperatively adjust the pneumatic flattening roller located above the winding roller to dynamically change the contact pressure, thereby ensuring the tightness and end face flatness of the finished roll throughout the process of increasing the roll diameter.

[0073] Preferably, the distance measuring sensor can use conventional laser triangulation reflective sensors, spectral confocal displacement sensors, and laser phase method distance measuring sensors on the market.

[0074] Preferably, the negative pressure sensor can use conventional silicon piezoresistive negative pressure sensors, ceramic capacitive negative pressure sensors, and diffused silicon negative pressure transmitters.

[0075] Preferably, the angle sensor can use IP54 BRT50, WDD35D4, and EL-WDA models.

[0076] In summary, the present application solves the technical problems of extremely thin and easily broken aluminum foil and sensitive tension fluctuation through physical parameter measurement modeling, dynamic roll diameter real-time reconstruction, and feedforward and feedback double-loop control strategy. At the same time, the use of vacuum adsorption isolation and super-speed active shearing technology eliminates the edge quality defects caused by traditional passive slitting, achieving high precision, high efficiency, and high yield in aluminum foil slitting.

[0077] In the starting stage, the inertia is calculated by laser scanning and motor micro-motion, instead of traditional estimation or manual input, which ensures the physical accuracy of the initial tension model and effectively avoids the foil break or wrinkle caused by model mismatch at the moment of starting. In the running process, through the double-loop control strategy, the tension response speed is ensured by the diameter feedforward, and the disturbance caused by material unevenness is eliminated by closed-loop correction, realizing constant tension output in the whole speed range. Especially, the vacuum adsorption buffer unit is introduced, which physically builds a tension isolation wall, completely cutting off the tension coupling interference between unwinding and winding, cooperating with the active overspeed cutting of the cutting tool, using the stretching effect caused by the small speed difference to ensure the smooth edge of the cut without burr. In addition, the diameter and speed double-dimensional collaborative flattening control used in the winding stage can dynamically adjust the contact pressure according to the diameter and speed of the winding material, effectively eliminating the air at high speed, preventing air pockets and uneven end faces, and significantly improving the rewinding quality of the finished aluminum foil roll.

[0078] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, which should be covered by the scope of the claims of the present application.

Claims

1. An aluminum foil high-precision intelligent slitting method based on online tension and roll diameter cooperative control, characterized in that, executed by the controller, comprising the following steps: S1: in response to a slitting start instruction, obtaining initial geometric parameters of the aluminum mother roll through the laser detection assembly, driving the motor to perform a micro exploratory action to inversely calculate an initial moment of inertia, constructing a global tension control model based on the geometric parameters and the moment of inertia, and performing a static pre-tensioning operation to eliminate aluminum foil slack; S2: during unwinding, continuously collecting the traction line speed and the motor angular speed, cyclically calculating the current dynamic roll diameter value, generating a feedforward torque instruction based on the dynamic roll diameter value, and combining the online feedback data of the tension sensor to perform closed-loop correction to maintain constant tension output on the unwinding side; S3: introducing the output aluminum foil into a vacuum adsorption buffer unit, using negative pressure adsorption force to lock the aluminum foil on the steady speed roller surface to isolate the tension fluctuations on the unwinding side and the winding side, and driving the slitting knife set to perform active shearing on the aluminum foil at a preset overspeed synchronization ratio in the isolated state; S4: based on the continuously updated winding roll diameter, performing a nonlinear taper tension control strategy to adjust the winding torque, and according to the winding roll diameter and the current line speed, cooperatively adjusting the contact pressure of the flattening roller to exclude interlayer air until a task completion signal is monitored.

2. The aluminum foil high-precision intelligent slitting method based on online tension and roll diameter cooperative control according to claim 1, characterized in that, The process of inversely calculating the initial moment of inertia in step S1 specifically includes: The controller sends a group of test pulse instructions containing an acceleration segment and a deceleration segment to the unwinding motor, drives the unwinding motor to drive the aluminum mother roll to perform reciprocating micro-motion within a range that does not produce actual unwinding displacement; high-frequency acquisition of the output torque current value and the corresponding angular acceleration response value of the unwinding motor during micro-motion; Subtract the known no-load friction loss torque of the system from the collected torque current value to obtain the effective net torque for driving the load; compare and analyze the effective net torque and the angular acceleration response value to extract the proportional coefficient therebetween as the numerical value of the initial moment of inertia of the aluminum mother roll.

3. The aluminum foil high-precision intelligent slitting method based on online tension and roll diameter cooperative control according to claim 2, characterized in that, The process of constructing a global tension control model in step S1 specifically includes: The controller first reads the material attribute parameters of the aluminum foil, combines the initial moment of inertia and the initial geometric parameters to establish a dynamic mapping table related to roll diameter change, moment of inertia attenuation and target tension; based on the dynamic mapping table, a unwinding tension reference curve is generated which is dynamically adjusted with the roll diameter decreasing and sets the basic tension values that the unwinding motor should output at different roll diameter nodes; Determine the tension deviation allowable range according to the allowable tensile strength of the aluminum foil material and the slitting process precision requirement, and define the tension deviation allowable range as an error threshold band triggering closed-loop feedback adjustment.

4. The aluminum foil high-precision intelligent slitting method based on online tension and roll diameter cooperative control according to claim 3, characterized in that, The process of cyclically calculating the dynamic roll diameter value in step S2 specifically includes: During the rotation of the unwinding shaft, the number of pulses fed back by the traction roller encoder and the number of pulses fed back by the unwinding motor encoder are synchronously accumulated within a time sampling period; Convert the number of pulses of the traction roller into the linear displacement increment of the aluminum foil, and convert the number of pulses of the unwinding motor into the angular displacement increment of the unwinding shaft; calculate the ratio of the linear displacement increment to the angular displacement increment as the original roll diameter value of the current sampling period; Smooth the original roll diameter original value of continuous multiple sampling periods, eliminate abnormal data generated by aluminum foil jumping, and obtain effective dynamic roll diameter value for control calculation.

5. The aluminum foil high-precision intelligent slitting method based on online tension and roll diameter cooperative control according to claim 4, characterized in that, The process of generating the feedforward torque instruction and performing closed-loop correction in the step S2 specifically includes: According to the real-time updated effective dynamic roll diameter value, the tension reference curve is combined to calculate the open-loop basic torque required to overcome the current moment of inertia and mechanical friction as a feedforward torque instruction directly sent to the unwinding motor; The actual tension value fed back by the tension sensor is monitored synchronously, and the deviation between the actual tension value and the target tension value is calculated; After detecting that the deviation exceeds the error threshold band, a compensation torque instruction is generated according to the size and direction of the deviation; The compensation torque instruction is superimposed on the feedforward torque instruction, and the output torque of the unwinding motor is dynamically adjusted until the deviation returns to the error threshold band.

6. The aluminum foil high-precision intelligent slitting method based on online tension and roll diameter cooperative control according to claim 1, characterized in that, The process of isolating tension fluctuation by using a vacuum adsorption buffer unit in the step S3 specifically includes: Start the negative pressure generating device connected to the inside of the buffer roll, and detect the adsorption pressure value at the micropore of the roll surface; After confirming that the adsorption pressure value reaches a locking threshold value sufficient to overcome the tangential slip force of the aluminum foil, the aluminum foil is tightly adsorbed on the surface of the buffer roll; The rotational linear speed of the buffer roll is set as the speed main reference of the entire slitting system, and the aluminum foil input on the forced unwinding side and the aluminum foil output on the winding side are forced to keep speed synchronization when passing through the buffer roll. By setting the vacuum adsorption node, the transmission of the unwinding side tension fluctuation to the winding side can be blocked.

7. The aluminum foil high-precision intelligent slitting method based on online tension and roll diameter cooperative control according to claim 1, characterized in that, The process of driving the slitting cutter group to perform active shearing in the step S3 specifically includes: Taking the running linear speed of the aluminum foil passing through the buffer roll as the reference, the target linear speed of the slitting cutter is calculated according to the preset overspeed proportion coefficient; The slitting cutter shaft driving motor is controlled to rotate continuously at the target linear speed, so that the cutting edge of the slitting cutter always maintains a higher linear speed than the moving speed of the aluminum foil during the entire shearing operation; The continuous speed difference forms a tightening effect on the aluminum foil in the shearing area, so that the aluminum foil is cut off in a tensioned state, avoiding tearing or flanging of the cut due to material relaxation.

8. The aluminum foil high-precision intelligent slitting method based on online tension and roll diameter cooperative control according to claim 1, characterized in that, The process of adjusting the contact pressure of the flattening roller in the step S4 specifically includes: During winding, the controller continuously monitors the current winding roll diameter and the aluminum foil running linear speed, and dynamically adjusts the opening of the pneumatic proportional valve according to the winding roll diameter and the running linear speed; After monitoring that the winding roll diameter increases, the pneumatic proportional valve is driven to perform a pressure reduction action, so that the contact pressure of the flattening roller on the surface of the aluminum foil roll decreases nonlinearly with the increase of the roll diameter, so as to avoid crushing the inner layer of aluminum foil; After monitoring that the running linear speed increases, the pneumatic proportional valve is driven to perform a pressure compensation action, so that the contact pressure of the flattening roller increases correspondingly with the increase of the speed, so as to press out the air that tries to enter the interlayer due to high-speed winding; The controller superimposes the pressure reduction adjustment amount based on the roll diameter and the pressure compensation amount based on the speed in real time, and outputs the final pressure control instruction to ensure that the finished product roll maintains consistent hardness throughout the process.

9. An aluminum foil high-precision intelligent slitting system based on online tension and roll diameter cooperative control, characterized in that, The system is used to perform the method of any one of claims 1 to 8, and specifically includes: The physical parameter acquisition module is configured to drive the laser detection assembly to scan the aluminum mother roll in a starting stage to acquire initial geometric parameters; The inertia dynamic identification module is configured to control the unwinding motor to perform a micro-motion test, collect torque and acceleration data to inversely calculate an initial moment of inertia, and output the initial moment of inertia; The tension model construction module is configured to construct a dynamic mapping table and a reference curve of the associated roll diameter and tension based on the initial geometric parameters and the moment of inertia; The dynamic roll diameter calculation module is configured to cyclically collect speed and position signals, calculate and output filtered effective dynamic roll diameter values in the unwinding operation; The double-loop tension adjustment module is configured to generate a feedforward instruction in combination with the effective dynamic roll diameter values, and generate a closed-loop compensation instruction using tension feedback to control the unwinding motor; The vacuum adsorption isolation module is configured to monitor the negative pressure state of the buffer unit, and set the buffer roller speed to a system speed reference after establishing adsorption locking; The synchronous active shearing module is configured to calculate a target overspeed value according to the system speed reference, and drive the slitting cutter group to implement active tensile shearing on the aluminum foil; The taper tension generation module is configured to control the output torque of the winding motor according to the real-time winding roll diameter in a non-linear decreasing strategy; The pressure cooperative compensation module is configured to dynamically adjust the contact pressure of the flattening roller according to the changes of the winding roll diameter and the running line speed.

10. An aluminum foil high-precision intelligent slitting device based on online tension and roll diameter cooperative control, which slits an aluminum foil (302) through a plurality of roller bodies installed on a base (301), characterized in that, The device is used to perform the method of any one of claims 1 to 8, and serves as a slitting carrier of the system of claim 9, and specifically comprises: The slitting unit (100) comprises an unwinding roller (101), a traction roller (102), an adsorption roller (103), a slitting roller (104), and a winding roller (105) which are fixedly installed on the top of the base (301) in sequence, the adsorption roller (103) is coaxially provided with a containing cavity (106) in the inside, the adsorption roller (103) is provided with an adsorption hole (107) which communicates with the containing cavity (106) on the surface, and the adsorption roller (103) is provided with a suction pipe (108) which is coaxial with the containing cavity (106) and penetrates through the adsorption roller (103), and the suction pipe (108) is provided with a suction pipe (109); The detection unit (200) comprises a negative pressure sensor (201) which is arranged on the top of the adsorption roller (103) and is used for detecting the adsorption strength, and the traction roller (102) is integrated with a pressure-sensitive film capacitor (202) which measures the pressure of the aluminum foil (302) to calculate the tension, and the unwinding roller (101) is provided with an angle sensor (203) which measures the rotation angle of the roller body at the shaft joint with the base (301); The base reference distance sensor (204a) which measures the distance of the roller body and the unwinding distance sensor (204b) which measures the distance of the aluminum mother roll are fixedly installed on the base (301) below the unwinding roller (101), and the roll diameter of the aluminum mother roll can be obtained by subtracting the distance measurement results of the two sensors and adding the radius of the roller body; The reference distance measuring sensor (204a) for measuring the distance of the roll body is fixedly installed below the winding roller (105) and on the base (301), and the winding distance measuring sensor (204c) for measuring the distance of the slit aluminum roll is fixedly installed on the base (301), and the distance measuring results of the two are subtracted and the radius of the roll body is added to obtain the winding roll diameter of the slit aluminum roll.

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