An intelligent collaborative control method and system for oxygen-free copper multi-head wire drawing production

Abstract

The present application relates to copper wire processing technical field, especially to a kind of oxygen-free copper multi-head wire drawing production intelligent collaborative control method, the die database of different specifications wire drawing die and the process database containing historical production data are constructed, based on die database and process database, the optimal die aperture sequence in wire drawing host is automatically matched, ensure that each pass compression ratio is evenly distributed;Avoid copper wire internal stress concentration caused by local deformation too large, reduce the risk of broken wire, while greatly saving preparation working hours.Control center acquires wire drawing data of copper wire in wire drawing host by first detection unit and determines wire drawing state;When the sliding rate of copper wire at the corresponding wire drawing die is out of limit, the system can quickly respond to adjust, reduce the risk of broken wire.Autogenerate compensation parameters according to process database storage historical production error, for the same specification wire drawing production and variable specification wire drawing production, compensation mechanism respectively executes tension compensation and annealing parameter dynamic compensation, improves wire drawing production precision.

Description

Technical Field

[0001] This invention relates to the field of copper wire processing technology, and in particular to an intelligent collaborative control method and system for oxygen-free copper multi-head wire drawing production. Background Technology

[0002] Oxygen-free copper multi-head wire drawing production lines are core equipment in the manufacturing of electronics, cables, and precision conductors. They process copper rods to the target diameter through multiple drawing passes, and combine this with annealing, tension control, and winding processes to ensure wire performance. However, existing technologies still have shortcomings in actual production.

[0003] Traditional wire drawing machines rely on fixed die ratios and cannot adjust process parameters in real time according to die wear. When the diameter of the sizing zone of a die on a die holder expands due to long-term use, there is a risk that the failure of a single die will affect the stable operation of the entire drawing machine, and it is also very easy to cause wire breakage. Existing technologies usually rely on manual periodic inspection or post-event die replacement, which is not only inefficient but also cannot prevent sudden wire breakage.

[0004] In actual production, there are many places in the workshop where air pressure is used, which may cause deviations in the outer diameter of the wire drawing machine's air pump. Secondly, the vibration of the copper wire on the annealing wheel of the annealing device causes the copper wire to be annealed in a state of alternating tension and looseness. The annealing current density is unstable, and the copper wire is introduced into the annealing device at a high speed with low strength. The copper wire sparks on the annealing wheel, which may cause uneven wire diameter or reduce the surface smoothness of the copper wire.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] This invention provides an intelligent collaborative control method and system for oxygen-free copper multi-head wire drawing production, which can effectively solve the problems in the background technology.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A method for intelligent collaborative control of oxygen-free copper multi-head wire drawing production includes the following steps:

[0009] Based on the production needs of the control center, the parameter information of different specifications of wire drawing dies is collected and a die database is constructed;

[0010] The control center collects historical production data and builds a process database, and sets up a compensation mechanism based on the process database.

[0011] Based on the aforementioned mold database and according to the compression ratio and mold base data required for the production of the wire drawing host, intelligent proportioning and installation of wire drawing dies are performed;

[0012] The first detection unit collects the drawing data of the copper wire in the drawing host, and the control center determines the drawing status based on the drawing data and the mold database.

[0013] The tension data and air pressure data of the tension adjustment device are collected by the second and third detection units respectively, and the tension status of the copper wire is determined.

[0014] When the wire drawing state and / or the tension state are abnormal, the traction machine and the take-up device are adjusted respectively through the control center.

[0015] Furthermore, based on the parameter information of the drawing die in the drawing host, the target die is determined, and the drawing data of the copper wire at the target die is collected by the first detection unit;

[0016] The control center calculates the slip ratio at the target mold based on the wire drawing data and the operating parameters of the wire drawing host, and determines the wire drawing state through the slip ratio.

[0017] Furthermore, determining the target die based on the parameter information of the drawing die in the drawing host includes the following steps:

[0018] Extract the cumulative usage time data of multiple wire drawing die parameter information in the wire drawing host;

[0019] The wire drawing die with the longest cumulative usage time was selected as the monitoring die.

[0020] Determine the mold base data of the monitored mold, i.e., mold base number i;

[0021] The wire drawing die at die holder number i+1 is identified as the target die.

[0022] Furthermore, the first detection unit collects the wire exit velocity v of the copper wire at the target mold. out,i+1 The slip ratio at the target mold is expressed as follows:

[0023] η i+1 =(V i+1 -v out,i+1 ) / v out,i+1 *100%

[0024] Among them, V i+1 This represents the traction speed of the copper wire by the (i+1)th traction wheel in the wire drawing machine;

[0025] If the slip rate is greater than the maximum threshold of the safe range, the wire drawing state is determined to be abnormal.

[0026] The control center adjusts the rotational speed of the (i+1)th traction wheel, and in conjunction with this, adjusts the pulling speed of the traction machine and the winding speed of the winding device.

[0027] Furthermore, the intelligent proportioning and installation process of the wire drawing die in the wire drawing host includes the following steps:

[0028] Determine the diameter D0 of the raw material and the diameter D of the target copper wire to be introduced into the wire drawing machine. n And the number of drawing dies, n; with the goal of achieving a uniform distribution of compression ratio in each pass of the drawing host, the objective function is determined as follows:

[0029]

[0030] The constraints are expressed as follows:

[0031] 5%≤ε i ≤20%;

[0032]

[0033]

[0034] Where n is the number of drawing passes, i is the drawing die number, i = 1, 2, ..., n, ε i This represents the compression ratio of the i-th pass. Indicates the average compression ratio;

[0035] The nominal dimensions of the wire drawing die sizing zone at any pass are obtained. Based on the die database, the wire drawing die with the closest nominal dimensions is matched and installed on the die holder of the corresponding pass.

[0036] Furthermore, the tension wheel of the tension adjustment device is mounted on the swing arm, and the swing arm is driven by a cylinder to tension the copper wire by the tension wheel;

[0037] The second detection unit collects the tension value of the copper wire on the tension wheel at a preset frequency. When the third detection unit detects air pressure fluctuations, the control center drives the second detection unit to perform a high-frequency sampling operation.

[0038] The control center drives the second detection unit to sample at high frequency and calculates the rate of change of tension value after a sudden change in air pressure. If the rate of change exceeds a set threshold, the pulling speed of the traction machine and the winding speed of the winding device are adjusted in conjunction.

[0039] Furthermore, the tension compensation amount is set based on historical production data of the same specification wire drawing production, including the following steps:

[0040] Obtain the production error of copper wire from each production task in historical production data;

[0041] The copper wire size error of multiple production tasks with similar time periods is obtained, and the tension compensation amount is obtained by weighted calculation, with weighting coefficients set according to the time distance.

[0042] When a new task based on continuous production of wire drawing of the same specification begins, the control center automatically calculates the tension compensation amount and adjusts the tension regulating device.

[0043] Furthermore, based on historical production data of variable specification wire drawing production, dynamic compensation for annealing parameters is set, including the following steps:

[0044] Preset standard annealing currents for different copper wire diameters;

[0045] Obtain the copper wire size error of multiple production tasks with similar time periods and calculate the average value, and score the surface quality of the copper wire obtained from the previous variable specification wire drawing production task.

[0046] The annealing current compensation coefficient is calculated based on the average error and the scoring data of the copper wire surface quality.

[0047] The compensated annealing current is calculated based on the standard annealing current and the annealing current compensation coefficient, and the annealing device is adjusted accordingly.

[0048] Furthermore, the fourth detection unit collects the temperature and pH data of the drawing fluid in the drawing host, and sets temperature and pH thresholds in the control center.

[0049] The system determines whether to start the heat exchanger by matching temperature data with temperature thresholds, and whether to inject alkaline additives or replenish drawing fluid by matching pH data with pH thresholds.

[0050] An intelligent collaborative control system for multi-head oxygen-free copper wire drawing production, employing the aforementioned intelligent collaborative control method for multi-head oxygen-free copper wire drawing production, includes:

[0051] The wire drawing host includes multiple die holders and traction wheels. Each die holder is equipped with a wire drawing die. The wire drawing host adjusts the rotation speed of the traction wheels based on the instructions from the control center.

[0052] The traction machine adjusts the cable speed based on instructions from the control center;

[0053] The annealing apparatus performs the annealing operation based on the compensated annealing current calculated by the control center.

[0054] Tension adjustment device, including tension wheel, rocker arm and cylinder, is used to adjust the tension of copper wire;

[0055] The take-up device adjusts the take-up speed based on the instructions from the control center;

[0056] The control center is used to store the mold database and process database, and to perform intelligent proportioning of wire drawing dies, slippage rate calculation, tension compensation and dynamic compensation of annealing parameters;

[0057] The first detection unit is located at the outlet of each mold base and is used to collect the exit speed of the copper wire and transmit it to the control center to calculate the slip ratio.

[0058] The second detection unit is located at the tension wheel and is used to collect copper wire tension data;

[0059] The third detection unit is used to monitor the air pressure data of the cylinder;

[0060] The fourth detection unit is used to monitor the temperature and pH value of the drawing fluid and feed it back to the control center to trigger cooling or replenishment operations.

[0061] The beneficial effects of this invention are as follows:

[0062] This invention, based on a mold database and a process database, automatically matches the optimal mold aperture sequence in the wire drawing machine, ensuring a uniform distribution of compression ratios in each pass. Specifically, the control center calculates the nominal dimensions of the sizing zone for each pass mold and directly retrieves the mold closest to the nominal dimensions from the mold database for installation. This avoids stress concentration within the copper wire caused by excessive local deformation, reducing the risk of wire breakage. The system's automatic mold selection also significantly saves preparation time.

[0063] The first detection unit, such as a laser velocimeter, collects the copper wire speed at the exit of each drawing die in real time. Combined with the speed of the corresponding traction wheel at the exit, the slippage rate of the copper wire is calculated. When the slippage rate exceeds a threshold, the system determines that the corresponding drawing die is abnormally worn, automatically adjusts the speed of the corresponding traction wheel, and simultaneously corrects the speed of the traction machine and the take-up device. When the slippage rate exceeds the limit, the system can respond quickly to adjust, reducing the risk of wire breakage. The control center dynamically controls the traction machine and take-up device to follow the wire, reducing speed matching errors and eliminating wire diameter fluctuations caused by speed mismatch.

[0064] Based on the historical production errors stored in the process database, compensation parameters are automatically generated. Specifically, the historical production data in the process database is divided into wire drawing production of the same specification and wire drawing production of different specifications. The compensation mechanism is set with tension compensation and dynamic compensation of annealing parameters for wire drawing production of the same specification and wire drawing production of different specifications, respectively, to improve wire drawing accuracy. Attached Figure Description

[0065] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0066] Figure 1 This is a schematic diagram of the intelligent collaborative control method for oxygen-free copper multi-head wire drawing production in this invention;

[0067] Figure 2 This is a schematic diagram of the intelligent collaborative control system framework for oxygen-free copper multi-head wire drawing production in this invention;

[0068] Figure 3 This is a schematic diagram of the process for detecting the wire drawing status of the wire drawing host in this invention;

[0069] Figure 4 This is a schematic diagram of the intelligent proportioning process of the wire drawing host and wire drawing die in this invention;

[0070] Figure 5 This is a flowchart illustrating the compensation mechanism in this invention. Detailed Implementation

[0071] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0072] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0073] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0074] The multi-head drawing process for oxygen-free copper is a hard drawing process. It typically uses 8mm diameter round copper rods as raw material. The drawing equipment consists of a pay-off frame, a drawing main unit, a traction machine, an annealing device, a tension adjustment device, and a take-up device. Changing the diameter of the copper wire is mainly achieved through the drawing main unit, driven by a traction wheel and working in conjunction with the drawing die. Under the lubrication and cooling effect of the drawing fluid, the copper rod deforms according to the die's aperture. With each pass through the die, the wire diameter decreases by one specification. The traction machine provides sufficient tension to the copper wire in the drawing main unit.

[0075] After copper wire undergoes cold working and plastic deformation in a wire drawing machine, its internal grains fragment and residual internal stress exist. It has a spontaneous tendency to change towards a stable state, but at room temperature, the diffusion ability of atoms is very weak, making this change difficult. Therefore, an annealing device is used to increase the kinetic energy of the atoms, restoring the copper wire to its pre-cold working state in the shortest possible time. Currently, online continuous drawing and annealing equipment is commonly used. This type of equipment uses three electrode wheels to first preheat the conductor to approximately 250°C, then heat it to 500–550°C for annealing. During annealing, inert gas or steam is introduced for protection, and cooling water is used for cooling. This method allows for continuous online annealing with automatic tracking of the annealing speed. However, because the current is transmitted via brushes, sparks can sometimes occur between the single wire and the electrode wheels, affecting the surface quality and diameter of the single wire.

[0076] like Figures 1 to 5 As shown, this invention discloses an intelligent collaborative control method for oxygen-free copper multi-head wire drawing production, comprising the following steps:

[0077] Based on the production needs of the control center, parameter information of different specifications of wire drawing dies is collected and a die database is constructed; historical production data is collected through the control center and a process database is constructed, and a compensation mechanism is set based on the process database; based on the die database and according to the compression ratio and die base data required for the production of the wire drawing host, the wire drawing dies are intelligently matched and installed; the wire drawing data of copper wire in the wire drawing host is collected through the first detection unit, and the control center determines the wire drawing status based on the wire drawing data and the die database; the tension data and air pressure data of the tension adjustment device are collected through the second and third detection units respectively, and the tension status of the copper wire is determined; when the wire drawing status and / or tension status are abnormal, the traction machine and take-up device are adjusted through the control center respectively.

[0078] In the specific implementation process, such as Figure 1 As shown, based on the mold database and process database, the system automatically matches the optimal mold aperture sequence in the wire drawing machine to ensure a uniform distribution of compression ratios in each pass. Specifically, the control center calculates the nominal dimensions of the sizing zone of each pass mold and directly retrieves the mold closest to the nominal dimensions from the mold database for installation. This avoids stress concentration inside the copper wire caused by excessive local deformation, reducing the risk of wire breakage. The system's automatic mold selection also significantly saves preparation time.

[0079] The first detection unit, such as a laser velocimeter, collects the copper wire speed at the exit of each drawing die in real time. Combined with the speed of the corresponding traction wheel at the exit, the slippage rate of the copper wire is calculated. When the slippage rate exceeds a threshold, the system determines that the corresponding drawing die is abnormally worn, automatically adjusts the speed of the corresponding traction wheel, and simultaneously corrects the speed of the traction machine and the take-up device. When the slippage rate exceeds the limit, the system can respond quickly to adjust, reducing the risk of wire breakage. The control center dynamically controls the traction machine and take-up device to follow the wire, reducing speed matching errors and eliminating wire diameter fluctuations caused by speed mismatch.

[0080] A tension-pressure linkage detection mechanism is set up, which periodically monitors data through a second detection unit, such as a tension sensor, and monitors data in real time through a third detection unit, such as a pressure sensor. When the pressure changes abruptly, high-frequency tension sampling is triggered, and the tension change rate is calculated synchronously. When the change rate exceeds the limit, it indicates that the wire storage reel in the tension adjustment device has failed and has lost its passive adjustment function for changes in copper wire tension. It is necessary to control the traction machine or take-up device through the control center to assist in the adjustment and restore the tension adjustment function of the wire storage reel. If it cannot be adjusted automatically, the control center will issue an early warning request for manual intervention.

[0081] The compensation parameters are automatically generated based on the historical production errors stored in the process database. Specifically, the historical production data in the process database is divided into wire drawing production of the same specification and wire drawing production of different specifications. The compensation mechanism is set with tension compensation and dynamic compensation of annealing parameters for wire drawing production of the same specification and wire drawing production of different specifications, respectively.

[0082] Among them, the wire drawing production based on the same specification means restarting after a shutdown for maintenance and continuing production with the wire drawing specification of the previous task. At this time, the main consideration is the impact of the tension adjustment device on the diameter of the finished copper wire, so as to ensure the consistency of wire diameter in the same batch.

[0083] Furthermore, when the next task requires changing the wire drawing specifications and re-threading for production, the new wire drawing production task is restarted after the machine is shut down for maintenance. At this time, the main consideration is the impact of the annealing device on the diameter of the final copper wire product, so as to further improve the wire drawing production accuracy.

[0084] In this embodiment, as Figure 3 As shown, the target die is determined based on the parameter information of the drawing die in the drawing host, and the drawing data of the copper wire at the target die is collected by the first detection unit; the control center calculates the slip ratio at the target die based on the drawing data and the operating parameters of the drawing host, and determines the drawing state by the slip ratio.

[0085] The process of determining the target die based on the parameter information of the wire drawing die in the wire drawing machine includes the following steps:

[0086] Extract the cumulative usage time data of multiple drawing die parameters in the drawing host; select the drawing die with the largest cumulative usage time as the monitoring die; determine the die base data of the monitoring die, i.e., die base number i; and determine the drawing die on the die base with die base number i+1 as the target die.

[0087] Furthermore, the first detection unit collects the wire exit velocity v of the copper wire at the target mold. out,i+1 The slip ratio at the target mold is expressed as follows:

[0088] η i+1 =(V i+1 -v out,i+1 ) / v out,i+1 *100%

[0089] Among them, V i+1 This represents the traction speed of the copper wire by the (i+1)th traction wheel in the wire drawing machine;

[0090] If the slip rate is greater than the maximum threshold of the safe range, the wire drawing state is determined to be abnormal.

[0091] The control center adjusts the speed of the (i+1)th traction wheel, and in conjunction with this, adjusts the pulling speed of the traction machine and the winding speed of the winding device.

[0092] In the specific implementation process, the cumulative usage time of the wire drawing die is correlated with the die life. The wire drawing die with the longest usage time and closest to the critical value of its service life is monitored as the monitoring die. Furthermore, the slip rate of the next pass, i.e. the slip rate at the target die, is detected to indirectly determine whether the monitoring die has failed. If the monitoring die fails, the compression ratio at the target die will far exceed the critical threshold of 20%, causing the slip rate at that point to also increase and exceed the limit.

[0093] Compared to traditional manual inspection or post-incident maintenance, this method can detect potential wear risks in advance. Employing an adjacent die holder monitoring strategy significantly improves identification accuracy and reduces false alarm rates compared to direct monitoring. When the slippage rate exceeds the limit, the traction wheel speed is first fine-tuned. If the excessive trend does not converge, the speeds of the traction machine and take-up device are further adjusted in tandem. Through dynamic adjustment, the slippage rate is stabilized within the ideal range, avoiding the risk to the entire wire drawing machine's operation due to the failure of individual wire drawing dies.

[0094] In this embodiment, as Figure 4 As shown, the intelligent proportioning and installation process of the wire drawing die in the wire drawing host includes the following steps:

[0095] Determine the diameter D0 of the raw material to be fed into the wire drawing machine and the diameter D of the target copper wire. n And the number of wire drawing stages, n;

[0096] With the goal of achieving a uniform distribution of compression ratios in each pass of the wire drawing machine, the objective function is determined as follows:

[0097]

[0098] The constraints are expressed as follows:

[0099] 5%≤ε i ≤20%;

[0100]

[0101]

[0102] Where n is the number of drawing passes, i is the drawing die number, i = 1, 2, ..., n, ε i This represents the compression ratio of the i-th pass. Indicates the average compression ratio;

[0103] Obtain the nominal size of the sizing zone of the wire drawing die at any pass, match the wire drawing die with the closest nominal size based on the die database, and install it on the die holder of the corresponding pass.

[0104] In the specific implementation process, firstly, the diameter of the raw material and the target diameter are determined, and the total compression ratio is calculated. Secondly, the number of passes is determined according to the number of die holders in the wire drawing host, and the compression ratio is evenly distributed according to the number of passes. Then, the nominal value of the sizing zone aperture size of the wire drawing die in each pass is calculated in reverse. Finally, the wire drawing die closest to the nominal value in the die database is matched.

[0105] Taking a Φ2.0mm copper rod as an example, which is then drawn into a Φ0.5mm copper wire through 8 drawing processes:

[0106] First, calculate the initial proportions:

[0107]

[0108] The nominal values ​​of the sizing zone apertures of multiple drawing dies in the wire drawing machine can be determined as follows:

[0109] Φ1.82→Φ1.65→Φ1.50→Φ1.36→Φ1.23→Φ1.12→Φ0.92→Φ0.76;

[0110] The fifth die, Φ1.23, is set as the monitoring die. The wire exit speed of the sixth die is collected by the first detection unit and the slip ratio is calculated: η=15.9 / 15.2-1=4.6%; at this time, the wire drawing state is stable.

[0111] In this embodiment, the tension wheel of the tension adjustment device is mounted on the swing arm. The swing arm is driven by a cylinder, which in turn drives the tension wheel to tension the copper wire. The second detection unit collects the tension value of the copper wire on the tension wheel at a preset frequency. When the third detection unit detects air pressure fluctuations, the control center drives the second detection unit to perform high-frequency sampling. The control center calculates the rate of change of the tension value after the air pressure change by driving the second detection unit to perform high-frequency sampling. If the rate of change exceeds a set threshold, the pulling speed of the traction machine and the winding speed of the winding device are adjusted in conjunction.

[0112] In practical implementation, the tension regulating device is equipped with a tension-pressure linkage detection mechanism. The tension sensor periodically monitors data, while the pressure sensor monitors the air pump data in real time. When the pressure changes abruptly, the tension sensor is triggered to sample at high frequency, and the tension value is simultaneously uploaded to the control center to calculate the tension change rate. When the change rate exceeds the limit, it indicates that the wire storage reel group in the tension regulating device has failed, losing its passive adjustment function for changes in copper wire tension. The copper wire between the wire storage reels may decrease to a critical value due to the swing of the tension wheel. It is necessary to control the traction machine or take-up device through the control center to assist in regulating and restoring the tension regulating function of the wire storage reel group. If automatic adjustment is not possible, the control center will issue an early warning request for manual intervention.

[0113] In this embodiment, as Figure 5 As shown, the historical production data in the process database is divided into wire drawing production of the same specification and wire drawing production of different specifications. The compensation mechanism is set with tension compensation and dynamic compensation of annealing parameters for wire drawing production of the same specification and wire drawing production of different specifications, respectively.

[0114] The method of setting tension compensation based on the same specification wire drawing production data in historical production data includes the following steps: obtaining the production error of copper wire obtained from each production task in historical production data; obtaining the copper wire size error of multiple production tasks with similar time periods, and obtaining the tension compensation amount through weighted calculation, setting weight coefficients according to the time distance; when a new task of continuous production of the same specification wire drawing begins, the control center automatically calculates the tension compensation amount and adjusts the tension adjustment device.

[0115] Specifically, the production error of copper wire in historical production data is calculated and expressed as follows:

[0116] e l =D set -D act,l ;

[0117] Among them, e l D represents the production error of the copper wire in the first production run. set D represents the target diameter for the l-th production. act,l This represents the average diameter during the l-th production run;

[0118] The production errors at three similar times are obtained, and the tension compensation amount is calculated by weighted average, as shown below:

[0119]

[0120] Among them, w i The weighting coefficient is set according to the time interval, and K is the tension-diameter conversion coefficient, which is experimentally calibrated and has a typical value range of 0.3 to 0.5 N / μm.

[0121] When a new task for wire drawing production of the same specifications begins, the control center automatically calculates the tension compensation and adjusts the tension regulating device. When the actual diameter is smaller than the set diameter, it indicates that the tension is too high, causing the copper wire to be pulled thin, and the tension needs to be reduced; when the actual diameter is larger than the set diameter, it indicates that the tension is too low, causing the copper wire to be too thick, and the tension needs to be increased.

[0122] Furthermore, dynamic compensation of annealing parameters is set based on historical production data of variable specification wire drawing production data, including the following steps: preset standard annealing currents for different copper wire diameters; obtain the copper wire size errors of multiple production tasks with similar time periods and calculate the average value, and score the surface quality of the copper wire obtained from the previous variable specification wire drawing production task; calculate the annealing current compensation coefficient based on the average error and the copper wire surface quality score data; calculate the compensated annealing current according to the standard annealing current and the annealing current compensation coefficient, and adjust the annealing device.

[0123] Specifically, the standard annealing current I0 is preset for different copper wire diameters;

[0124] Obtain the average error of three copper wire productions that are close in time from historical production data. It is expressed as follows:

[0125]

[0126] Calculate the annealing current compensation coefficient K I , means as follows:

[0127]

[0128] Among them, e S The scoring deviation for the surface quality of the copper wire in the previous production task is set as the difference between the actual score and 10 points; D set D represents the target diameter for the Lth production run. act,l Let α represent the average diameter in the Lth production run, where α is the diameter error compensation coefficient, ranging from 0.02 to 0.05% / μm; and β is the surface quality compensation coefficient, ranging from 0.5% / min.

[0129] The calculated compensated annealing current is expressed as follows:

[0130] I = I0·(1+K) I );

[0131] Annealing device based on compensated annealing current adjustment.

[0132] Example of surface quality scoring criteria: Spark marks - deduct 2 points / mark, Oxidation spots - deduct 1 point / mark.

[0133] In this embodiment, the fourth detection unit collects the temperature and pH data of the drawing fluid in the drawing host, and sets the temperature threshold and pH threshold in the control center; the temperature data is matched with the temperature threshold to determine whether to start the heat exchanger, and the pH data is matched with the pH threshold to determine whether to inject alkaline additives or replenish the drawing fluid.

[0134] In practical application, wire drawing fluid can maintain a long service life through routine maintenance. However, without proper maintenance, it is prone to lubrication and emulsification failures. Firstly, the pH of a properly prepared wire drawing fluid should ideally be between 7.5 and 8.5. If the pH falls below 7, it is necessary to replenish the original fluid or add an alkaline substance to raise the pH; otherwise, bacteria will quickly proliferate and cause spoilage. Secondly, the normal operating temperature for the wire drawing fluid is approximately 36°C to 45°C. Excessive temperature leads to the evaporation of active ingredients, resulting in significant losses, lubrication failure, conductor oxidation, blackening, and spotting. A cooling tower or heat exchanger is required to lower the temperature. Finally, in emulsified fluids, grease and copper powder can easily form a gel-like substance, clogging the membrane and causing wire breakage. Regular filtration is necessary.

[0135] This invention further discloses an intelligent collaborative control system for oxygen-free copper multi-head wire drawing production, such as... Figure 2 As shown, the intelligent collaborative control method for multi-head oxygen-free copper wire drawing production includes:

[0136] The wire drawing host includes multiple die holders and traction wheels. Each die holder is equipped with a wire drawing die. The wire drawing host adjusts the speed of the traction wheels based on the instructions from the control center.

[0137] The traction machine adjusts the cable speed based on commands from the control center;

[0138] The annealing unit performs the annealing operation based on the compensated annealing current calculated by the control center.

[0139] Tension adjustment device, including tension wheel, rocker arm and cylinder, is used to adjust the tension of copper wire;

[0140] The take-up device adjusts the take-up speed based on instructions from the control center.

[0141] The control center is used to store the mold database and process database, and to perform intelligent proportioning of wire drawing dies, slippage rate calculation, tension compensation and dynamic compensation of annealing parameters;

[0142] The first detection unit is located at the exit of each mold base and is used to collect the exit speed of the copper wire and transmit it to the control center to calculate the slip ratio.

[0143] The second detection unit is located at the tension wheel and is used to collect copper wire tension data;

[0144] The third detection unit is used to monitor the cylinder's air pressure data;

[0145] The fourth detection unit is used to monitor the temperature and pH value of the drawing fluid and send the feedback to the control center to trigger cooling or replenishment operations.

[0146] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for intelligent collaborative control of oxygen-free copper multi-head wire drawing production, characterized in that, Includes the following steps: Based on the production needs of the control center, the parameter information of different specifications of wire drawing dies is collected and a die database is constructed; The control center collects historical production data and builds a process database, and sets up a compensation mechanism based on the process database. Based on the aforementioned mold database and according to the compression ratio and mold base data required for the production of the wire drawing host, intelligent proportioning and installation of wire drawing dies are performed; The first detection unit collects the drawing data of the copper wire in the drawing host, and the control center determines the drawing status based on the drawing data and the mold database. The tension data and air pressure data of the tension adjustment device are collected by the second and third detection units respectively, and the tension status of the copper wire is determined. When the wire drawing state and / or the tension state are abnormal, the traction machine and the take-up device are adjusted respectively through the control center.

2. The intelligent collaborative control method for oxygen-free copper multi-strand wire drawing production according to claim 1, characterized in that, The target mold is determined based on the parameter information of the drawing die in the drawing host, and the drawing data of the copper wire at the target mold is collected by the first detection unit; The control center calculates the slip ratio at the target mold based on the wire drawing data and the operating parameters of the wire drawing host, and determines the wire drawing state through the slip ratio. 3.The oxygen-free copper multi-strand wire drawing production intelligent collaborative control method according to claim 2, characterized in that, The determination of the target die based on the parameter information of the drawing die in the drawing host includes the following steps: Extract the cumulative usage time data of multiple wire drawing die parameter information in the wire drawing host; The wire drawing die with the longest cumulative usage time was selected as the monitoring die. Determine the mold base data of the monitored mold, i.e., mold base number i; The wire drawing die at die holder number i+1 is identified as the target die.

4. The intelligent collaborative control method for oxygen-free copper multi-strand wire drawing production according to claim 2, characterized in that, The first detection unit collects the wire exit velocity v of the copper wire at the target mold. out,i+1 The slip ratio at the target mold is expressed as follows: η i+1 = (V i+1 - v out,i+1 ) / v out,i+1 *100% wherein V i+1 represents the pulling speed of the copper wire by the i+1th traction wheel pair in the drawing master If the slip rate is greater than the maximum threshold of the safe range, the wire drawing state is determined to be abnormal. The control center adjusts the rotational speed of the (i+1)th traction wheel, and in conjunction with this, adjusts the pulling speed of the traction machine and the winding speed of the winding device.

5. The intelligent collaborative control method for oxygen-free copper multi-strand wire drawing production according to claim 1, characterized in that, The intelligent proportioning and installation process of the wire drawing die in the wire drawing host includes the following steps: Determine the raw material diameter D0 and the target copper wire diameter D imported into the drawing host n and the drawing die channel times n; With the goal of achieving a uniform distribution of compression ratios in each pass of the wire drawing machine, the objective function is determined as follows: ； The constraints are expressed as follows: ； ； ； Where n is the number of drawing passes, i is the drawing die number, i=1,2,…,n, ε i This represents the compression ratio of the i-th pass. Indicates the average compression ratio; The nominal dimensions of the wire drawing die sizing zone at any pass are obtained. Based on the die database, the wire drawing die with the closest nominal dimensions is matched and installed on the die holder of the corresponding pass.

6. The intelligent collaborative control method for oxygen-free copper multi-strand wire drawing production according to claim 1, characterized in that, The tension wheel of the tension adjustment device is mounted on the swing arm, and the swing arm is driven by a cylinder to drive the tension wheel to tension the copper wire. The second detection unit collects the tension value of the copper wire on the tension wheel at a preset frequency. When the third detection unit detects air pressure fluctuations, the control center drives the second detection unit to perform a high-frequency sampling operation. The control center drives the second detection unit to sample at high frequency and calculates the rate of change of tension value after a sudden change in air pressure. If the rate of change exceeds a set threshold, the pulling speed of the traction machine and the winding speed of the winding device are adjusted in conjunction.

7. The intelligent collaborative control method for oxygen-free copper multi-strand wire drawing production according to claim 2, characterized in that, Setting tension compensation based on historical production data for the same wire drawing specifications includes the following steps: Obtain the production error of copper wire from each production task in historical production data; The copper wire size error of multiple production tasks with similar time periods is obtained, and the tension compensation amount is obtained by weighted calculation, with weighting coefficients set according to the time distance. When a new task based on continuous production of wire drawing of the same specification begins, the control center automatically calculates the tension compensation amount and adjusts the tension regulating device. 8.The oxygen-free copper multi-strand wire drawing production intelligent collaborative control method according to claim 7, characterized in that, Based on historical production data of variable specification wire drawing production, dynamic compensation of annealing parameters is set, including the following steps: Preset standard annealing currents for different copper wire diameters; Obtain the copper wire size error of multiple production tasks with similar time periods and calculate the average value, and score the surface quality of the copper wire obtained from the previous variable specification wire drawing production task. The annealing current compensation coefficient is calculated based on the average error and the scoring data of the copper wire surface quality. Calculate the compensated annealing current based on the standard annealing current and the annealing current compensation coefficient, and adjust the annealing device accordingly. 9.The oxygen-free copper multi-strand wire drawing production intelligent collaborative control method according to claim 1, characterized in that, The fourth detection unit collects the temperature and pH data of the drawing fluid in the drawing host, and sets the temperature and pH thresholds in the control center. The system determines whether to start the heat exchanger by matching temperature data with temperature thresholds, and whether to inject alkaline additives or replenish drawing fluid by matching pH data with pH thresholds.

10. An oxygen-free copper multi-head wire drawing production intelligent collaborative control system, characterized in that, The intelligent collaborative control method for oxygen-free copper multi-head wire drawing production as described in claim 8 includes: The wire drawing host includes multiple die holders and traction wheels. Each die holder is equipped with a wire drawing die. The wire drawing host adjusts the rotation speed of the traction wheels based on the instructions from the control center. The traction machine adjusts the cable speed based on instructions from the control center; The annealing apparatus performs the annealing operation based on the compensated annealing current calculated by the control center. Tension adjustment device, including tension wheel, rocker arm and cylinder, is used to adjust the tension of copper wire; The take-up device adjusts the take-up speed based on the instructions from the control center; The control center is used to store the mold database and process database, and to perform intelligent proportioning of wire drawing dies, slippage rate calculation, tension compensation and dynamic compensation of annealing parameters; The first detection unit is located at the outlet of each mold base and is used to collect the exit speed of the copper wire and transmit it to the control center to calculate the slip ratio. The second detection unit is located at the tension wheel and is used to collect copper wire tension data; The third detection unit is used to monitor the air pressure data of the cylinder; The fourth detection unit is used to monitor the temperature and pH value of the drawing fluid and feed it back to the control center to trigger cooling or replenishment operations.

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