Method and device for dynamic adjustment of high-speed drawing force of microfilament

Abstract

The application relates to the technical field of micro-filament drawing, in particular to a dynamic adjustment method and device for high-speed drawing force of micro-filaments, which are applied to a dynamic adjustment system for high-speed drawing force of micro-filaments, based on a pressure sensor, real-time measurement of drawing resistance generated by a drawing unit in the process of reducing the diameter of a wire, and based on a force sensor, real-time measurement of counter-tension of the wire in the transmission process; dynamic adjustment of the current measured counter-tension is carried out according to an established counter-tension regulation strategy; wherein the counter-tension regulation strategy comprises a first relational expression for limiting counter-tension utilization rate, and a second relational expression for representing the mapping relationship between the drawing force and the breaking force of the wire after the diameter reduction by the drawing unit. Thus, in the high-speed drawing process, the drawing force of the wire is always maintained in a stable state, effectively reducing the problems of wire breakage, surface quality defects and die wear, improving the production efficiency and the finished product quality of the micro-filaments, and prolonging the service life of the die.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of micro-wire drawing, in particular to a dynamic adjustment method and device for high-speed drawing force of micro-wire. BACKGROUND

[0002] With the progress of science and technology and the growth of industrial demand, micro-wire materials are widely used in aerospace, precision instrument manufacturing, electronic communication and other fields due to their excellent performance. In the production process of micro-wire, high-speed drawing is a challenging process. The drawing force needs to be strictly controlled during the drawing process of micro-wire to ensure the mechanical properties, surface quality and processing precision of the wire. High-speed drawing not only can improve production efficiency, but also brings a series of problems such as tension fluctuation, wire breakage and die wear. Therefore, it is particularly important to measure and adjust the drawing force in real time during the drawing process to ensure the stability of production and the quality of finished products.

[0003] Most of the current micro-wire drawing equipment relies on fixed tension setting and manual adjustment mode, which is difficult to adapt to the real-time changes of drawing force in the high-speed drawing process, resulting in unstable wire tension during the drawing process, and prone to wire breakage or uneven tension, making it difficult to achieve continuous high-speed production. SUMMARY

[0004] In order to overcome the deficiencies in the prior art, the present application provides a dynamic adjustment method and device for high-speed drawing force of micro-wire, which can realize real-time dynamic measurement and adjustment of drawing force and improve the stability of high-speed drawing process of micro-wire.

[0005] In a first aspect, the present application provides a dynamic adjustment method for high-speed drawing force of micro-wire, applied to a dynamic adjustment system for high-speed drawing force of micro-wire, the dynamic adjustment system comprising a drawing unit, a traction unit and a tension unit, wherein the wire is wound on the traction unit after passing through the drawing unit, and then passes through the tension unit to be drawn into the next drawing unit for multi-stage reducing diameter, and the drawing unit is provided with a pressure sensor, and the tension unit is provided with a force sensor; the dynamic adjustment method comprises the following steps:

[0006] Driving the traction unit to generate a drawing force to draw the wire out of the drawing unit under the action of the drawing force and reduce the diameter;

[0007] Measuring the drawing resistance generated by the drawing unit during the diameter reduction process of the wire in real time based on the pressure sensor, and measuring the counter-tension of the wire in the transmission process in real time based on the force sensor;

[0008] According to the established counter-tension regulation strategy, the current measured counter-tension is dynamically adjusted; wherein the counter-tension regulation strategy comprises a first relationship for limiting the counter-tension utilization rate, and a second relationship for representing the mapping relationship between the drawing force and the breaking force of the wire after the diameter reduction by the drawing unit.

[0009] In a possible implementation, the first relationship and the second relationship are as follows:

[0010]

[0011] F=M q +q≤βF σ

[0012] wherein γ represents the counter-tension utilization rate; M0 represents the drawing resistance generated by the drawing unit when the counter-tension is zero; M q represents the drawing resistance generated by the drawing unit when the counter-tension is q; q represents the counter-tension; a and b respectively represent the lower limit of the counter-tension utilization rate and the upper limit of the counter-tension utilization rate; F represents the drawing force; β represents the safety factor in the drawing process; F σ represents the breaking force of the wire after the diameter reduction by the drawing unit.

[0013] In a possible implementation, the adjustment of the current measured counter-tension according to the established counter-tension regulation strategy comprises the following steps:

[0014] According to the current measured drawing resistance and counter-tension, the counter-tension utilization rate and the drawing force are calculated;

[0015] If the calculated counter-tension utilization rate is less than the set lower limit of the counter-tension utilization rate, or the calculated drawing force is greater than the product of the safety factor β and the breaking force F σ of the wire after the diameter reduction by the drawing unit, the tension unit is controlled to reduce the counter-tension; if the calculated counter-tension utilization rate is greater than or equal to the set upper limit of the counter-tension utilization rate, the tension unit is controlled to increase the counter-tension.

[0016] In a possible implementation, the tension unit is controlled to reduce or increase the counter-tension according to a set first step displacement; the first step displacement is 0.1%~0.5% q0 / s, q0 represents the set initial counter-tension.

[0017] In a possible implementation, the adjustment of the current measured counter-tension according to the established counter-tension regulation strategy further comprises the following steps:

[0018] According to the drawing force before and after the counter-tension adjustment, the drawing force fluctuation range is calculated;

[0019] If the calculated fluctuation range of the drawing force is greater than the set fluctuation range threshold, the control unit controls the traction unit to reduce the drawing speed until the fluctuation range of the drawing force is less than or equal to the set fluctuation range threshold.

[0020] In one possible implementation, the control unit controls the traction unit to reduce the drawing speed according to a set second step; the second step is 1% to 3% V0 / s, and V0 represents the set initial drawing speed.

[0021] In one possible implementation, the breaking force of the reduced-diameter wire is measured by the following steps:

[0022] The reduced-diameter wire is fixed in the clamps of the tensile testing machine according to a set gauge length;

[0023] The tensile testing machine applies a tensile force to the wire according to a set drawing speed;

[0024] The tensile force value when the wire breaks is recorded, and the tensile force value is taken as the measured breaking force.

[0025] In the second aspect, the application provides a dynamic adjustment device for high-speed drawing force of micro wires, which is applied to a dynamic adjustment system for high-speed drawing force of micro wires. The dynamic adjustment system includes a drawing unit, a traction unit, and a tension unit. A wire is wound on the traction unit through the drawing unit, and then passes through the tension unit to be provided to the next drawing unit for multi-stage diameter reduction. The drawing unit is provided with a pressure sensor, and the tension unit is provided with a force sensor. The device includes:

[0026] A driving module is configured to drive the traction unit to generate a drawing force to draw the wire out of the drawing unit for diameter reduction under the action of the drawing force.

[0027] A measurement module is configured to measure, in real time, a drawing resistance generated by the drawing unit during the diameter reduction of the wire based on the pressure sensor, and measure, in real time, a counter-tension of the wire during transmission based on the force sensor.

[0028] An adjustment module is configured to dynamically adjust the currently measured counter-tension according to an established counter-tension regulation strategy. The counter-tension regulation strategy includes a first relationship for limiting counter-tension utilization and a second relationship for representing a mapping relationship between the drawing force and the breaking force of the wire after diameter reduction by the drawing unit.

[0029] In a third aspect, the present application provides an electronic device, comprising a processor, a memory and a bus, the memory storing machine readable instructions executable by the processor, the processor and the memory communicating through the bus when the electronic device is running, the machine readable instructions being executed by the processor to perform the steps of the dynamic adjustment method of the high-speed drawing force of microfilaments according to any one of the first aspect.

[0030] In a fourth aspect, the present application provides a computer readable storage medium, the computer readable storage medium storing a computer program, the computer program being executed by a processor to perform the steps of the dynamic adjustment method of the high-speed drawing force of microfilaments according to any one of the first aspect.

[0031] The microfilament high-speed drawing force dynamic adjustment method and device provided by the embodiment are applied to a microfilament high-speed drawing force dynamic adjustment system, the dynamic adjustment system comprising a drawing unit, a traction unit and a tension unit, the traction unit being driven to generate a drawing force to draw a wire from the drawing unit under the action of the drawing force to reduce the diameter; the drawing resistance generated by the drawing unit during the diameter reduction of the wire is measured in real time based on the pressure sensor, and the counter-tension of the wire during transmission is measured in real time based on the force sensor; the currently measured counter-tension is adjusted according to the established counter-tension control strategy; wherein the counter-tension control strategy comprises a first relationship for limiting the counter-tension utilization rate, and a second relationship for representing the mapping relationship between the drawing force and the breaking force of the wire after the diameter reduction by the drawing unit. By simultaneously limiting the counter-tension utilization rate and the drawing force, it can be ensured that the counter-tension is always within the optimal range, so as to ensure that the drawing force of the wire is always maintained in a stable state during high-speed drawing, effectively reducing the problems of wire breakage, surface quality defects and mold wear, improving production efficiency and the quality of finished microfilaments, and prolonging the service life of the mold. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0033] Figure 1 The flowchart of the microfilament high-speed drawing force dynamic adjustment method according to an embodiment of the present application is shown;

[0034] Figure 2 The structural schematic diagram of the microfilament high-speed drawing force dynamic adjustment system according to an embodiment of the present application is shown;

[0035] Figure 3 Fig. 1 shows a structural schematic diagram of a dynamic adjusting device of a high-speed drawing force of microfilaments according to an embodiment of the present application;

[0036] Figure 4 Fig. 2 shows a structural block diagram of an electronic device according to an embodiment of the present application.

[0037] Main element symbol explanation:

[0038] 1, first fixed pulley, 2, die holder, 3, supporting spring, 4, wire drawing die, 5, pressure sensor, 6, second fixed pulley, 7, drawing driven wheel, 8, drawing driving wheel, 9, tension frame, 10, tension rod, 11, tension wheel. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of description and illustration, and do not serve to limit the protection scope of the present application. In addition, it should be understood that the schematic drawings are not drawn according to the actual proportions. The flowchart shows the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowchart can not be implemented in sequence, and the steps without logical context relationship can be reversed in sequence or implemented simultaneously. In addition, one or more other operations can be added to the flowchart or one or more operations can be removed from the flowchart under the guidance of the content of the present application.

[0040] In addition, the described embodiments are only some of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0041] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.

[0042] The current micro-wire drawing equipment mostly relies on fixed tension setting and manual adjustment mode, which is difficult to adapt to the real-time changes of tension in high-speed drawing process. These technologies have the following shortcomings: 1. Insufficient tension monitoring: the existing equipment usually lacks precise dynamic tension monitoring, and cannot obtain the change data of drawing force in real time during high-speed drawing process, resulting in unstable wire tension during drawing process, and easy to appear wire fracture or uneven tension phenomenon; 2. Adjustment response lag: the existing system mostly relies on manual adjustment or tension control based on preset fixed parameters, and the adjustment response of this mode is relatively slow, which cannot adjust the drawing force in real time, especially under high-speed drawing conditions, which is more likely to cause adjustment not in time, affecting the quality and production efficiency of the wire; 3. Shortened die life: due to the fluctuation of drawing force, the die is prone to excessive wear during use, thereby shortening its service life and increasing production cost; 4. Limited production efficiency: the lack of efficient automatic adjustment means leads to reduced production efficiency when the drawing force needs to be adjusted frequently, and it is difficult to achieve continuous high-speed production. In view of this, the present application provides a dynamic adjustment method and device for high-speed drawing force of micro-wire, which can ensure that the drawing force of the wire is always maintained in a stable state during high-speed drawing process, effectively reducing the problems of wire breakage, surface quality defects and die wear, improving the production efficiency and the quality of finished micro-wire, and prolonging the service life of the die.

[0043] In an embodiment, referring to the description attached Figure 1 The present application provides a dynamic adjustment method for high-speed drawing force of micro-wire, which is applied to a dynamic adjustment system for high-speed drawing force of micro-wire, the dynamic adjustment system comprises a drawing unit, a traction unit and a tension unit, wherein the wire is wound on the traction unit after passing through the drawing unit, and then passes through the tension unit to be provided to the next drawing unit for multi-stage reducing diameter, and the drawing unit is provided with a pressure sensor, and the tension unit is provided with a force sensor; the dynamic adjustment method comprises the following steps:

[0044] S1, driving the traction unit to generate a drawing force to draw the wire out of the drawing unit under the action of the drawing force, and reducing the diameter;

[0045] S2, measuring the drawing resistance generated by the drawing unit in the process of reducing the diameter of the wire in real time based on the pressure sensor, and measuring the counter-tension of the wire in the transmission process in real time based on the force sensor;

[0046] S3, dynamically adjusting the currently measured counter-tension according to the established counter-tension regulation strategy; wherein the counter-tension regulation strategy comprises a first relationship for limiting the utilization rate of counter-tension, and a second relationship for representing the mapping relationship between the drawing force and the breaking force of the wire after reducing the diameter by the drawing unit.

[0047] For the sake of clearly understanding the technical scheme of the embodiments of the present application, the dynamic adjustment system of the high-speed drawing force of microfilament can be described first. In fact, during the high-speed drawing process of the microfilament, it is difficult to accurately measure the drawing force because the drawing force of the microfilament is small and the speed is fast. Therefore, the dynamic adjustment system of the high-speed drawing force of microfilament is designed to accurately measure the drawing force and the counter-tension of the microfilament during the high-speed drawing process. Referring to the drawings attached to the specification Figure 2 In an embodiment, the dynamic adjustment system of the high-speed drawing force of microfilament mainly consists of a drawing unit, a traction unit and a tension unit. The drawing unit includes a die holder 2, a supporting spring 3, a wire drawing die 4 and a pressure sensor 5. The traction unit includes a drawing driven wheel 7 and a drawing driving wheel 8. The tension unit includes a tension frame 9, a tension rod 10 and a tension wheel 11. The wire drawing die 4 has a specific shape of die hole to gradually reduce the diameter of the thick wire to the required diameter. In the present application, the wire drawing die 4 is embedded in the die holder 2. The symmetrically installed supporting springs 3 on the left and right sides of the wire drawing die 4 provide symmetric constraint force to avoid the wire drawing deviation caused by asymmetric load distribution. At the same time, the wire drawing die 4 is in contact with the pressure sensor 5. The pressure sensor 5 is arranged on the right side of the die holder 2 and has a central hole in the center to allow the microfilament to pass through. The wire is guided by the first fixed pulley 1, enters the drawing unit, is reduced in diameter by the wire drawing die 4 and then is transmitted out of the drawing unit outlet. Then, the wire successively passes through the second fixed pulley 6, enters the traction unit and is drawn by the drawing driving wheel 8 and the drawing driven wheel 7. In the present embodiment, the wire is wound around the drawing driving wheel 8 and the driven wheel 7 for three turns to effectively draw the continuous movement of the wire by friction. The drawing driving wheel 8 is equipped with a speed sensor to measure the drawing speed V of the wire in real time. At the same time, the tension unit measures and adjusts the tension by the force sensor to ensure the stability of the tension of the wire during the high-speed drawing process. Too large tension will cause the wire drawing die 4 to bear too large tension, affecting the service life, and may cause the microfilament to be stretched too much and broken. Too small tension will cause the microfilament to lack enough tension during the stretching process, resulting in uneven thickness.

[0048] In step S1, the driving of the traction unit to generate the drawing force can be achieved by controlling the rotation of the drawing driving wheel 8 by the motor to generate the drawing force, thereby drawing the wire out of the drawing unit to achieve the purpose of reducing the diameter.

[0049] In step S2, the wire is drawn out of the wire drawing die 4 under the action of the drawing force. The drawing resistance of the wire to the wire drawing die 4 interacts with the wire drawing die 4 to drive the wire drawing die 4 to generate a rightward wire drawing die load equal to the drawing resistance, so that the wire drawing die 4 is pressed on the pressure sensor 5. The wire drawing die load measured by the pressure sensor 5 is the numerical value of the drawing resistance. At the same time, the counter-tension of the wire during the transmission process is measured in real time by the tension unit configured with the force sensor.

[0050] In step S3, the counter-tension in the wire transmission process is adjusted in real time through the established counter-tension regulation strategy to ensure the stability of the tension of the wire in the high-speed drawing process. The counter-tension regulation strategy is established based on a large amount of high-speed drawing data of the wire, and includes a first relationship for limiting the counter-tension utilization rate and a second relationship for representing the mapping relationship between the drawing force and the breaking force of the wire after the diameter reduction by the drawing unit. The first relationship and the second relationship are as follows:

[0051]

[0052] F = M q + q ≤ βF σ (2)

[0053] wherein γ represents the counter-tension utilization rate; M0 represents the drawing resistance generated by the drawing unit when the counter-tension is zero; M q represents the drawing resistance generated by the drawing unit when the counter-tension is q; q represents the counter-tension; a and b respectively represent the lower limit of the counter-tension utilization rate and the upper limit of the counter-tension utilization rate; F represents the drawing force; β represents the safety factor in the drawing process; and F σ represents the breaking force of the wire after the diameter reduction by the drawing unit. That is, the counter-tension regulation strategy established by the application for the high-speed drawing application scenario of the micro-wire simultaneously limits the counter-tension utilization rate and the drawing force related to the counter-tension (F = M q + q) to keep the counter-tension within the optimal range and ensure the stability of the high-speed drawing of the micro-wire.

[0054] Specifically, when the currently measured counter-tension is adjusted according to the established counter-tension regulation strategy, the counter-tension utilization rate γ and the drawing force F are first calculated according to the drawing resistance currently collected by the pressure sensor 5 and the counter-tension currently collected by the force sensor. If the calculated counter-tension utilization rate γ is less than the set lower limit a of the counter-tension utilization rate, or the calculated drawing force F is greater than the product of the safety factor β and the breaking force F σ of the wire after the diameter reduction, it indicates that the counter-tension is too large, which will cause the drawing force to rise rapidly and affect the drawing quality of the micro-wire or even cause the wire to break, and the tension unit is controlled to reduce the counter-tension. If the calculated counter-tension utilization rate γ is greater than the set upper limit b of the counter-tension utilization rate, it indicates that the counter-tension value may be too small, and the optimization effect on the high-speed drawing process of the micro-wire is insufficient, and the tension unit is controlled to increase the counter-tension.

[0055] The breaking force of the reduced-diameter wire is measured by fixing the reduced-diameter wire in the clamps of a tensile testing machine according to a set gauge length, applying a tensile force to the wire according to a set tensile speed based on the tensile testing machine, recording the tensile force value when the wire breaks, and taking the tensile force value as the measured breaking force.

[0056] Specifically, a professional tensile testing machine can be selected for the breaking force measurement, and the measurement range is selected according to the specifications and the expected breaking force of the wire, which can generally meet the testing requirements. For example, for thinner wires, a small-range but high-precision tensile testing machine is selected; for thicker or larger breaking force wires, a larger-range tensile testing machine is selected. A certain length of sample can be cut from the wire to be tested, and the sample is fixed in the upper and lower clamps of the tensile testing machine according to a set gauge length, and the clamps are ensured to clamp the wire, and the axis of the wire coincides with the center line of the clamps, to ensure that the tensile force is uniformly applied to the wire. The tensile testing machine is driven to apply a tensile force to the wire according to a set tensile speed, and the tensile force value applied to the wire is recorded in real time during the test. When the wire breaks, the tensile testing machine automatically stops, and the maximum tensile force value at the time of breaking is recorded, which is the breaking force of the wire. The set gauge length is 100 mm, the set tensile speed is 10 mm / min, and to make the measurement result more accurate, the measurement can be performed multiple times, and the average value of the measurement results is taken as the final breaking force F of the reduced-diameter wire. σ .

[0057] In an embodiment, the lower limit a of the reverse tension utilization rate is set to 90%, the upper limit b of the reverse tension utilization rate is set to 100%, and the value range of the safety factor β is 0.5-0.7. If the calculated reverse tension utilization rate γ is less than 90% according to the current drawing resistance collected by the pressure sensor 5 and the current reverse tension collected by the force sensor, or the calculated drawing force F exceeds the range of formula 2, it indicates that the reverse tension is too large, which can cause the drawing force to rise rapidly, affecting the wire drawing quality and even causing wire breakage. At this time, the reverse tension is reduced, and the reduction gradient of the reverse tension is 0.1%-0.5% q0 / s, q0 represents the set initial reverse tension. If the calculated reverse tension utilization rate γ is 100%, the reverse tension value may be too small, which is insufficient in reducing the surface defects of the fine wire and prolonging the service life of the drawing die, etc. At this time, the reverse tension is increased, and the increase gradient of the reverse tension is 0.1%-0.5% q0 / s, q0 represents the set initial reverse tension.

[0058] Since the stability of the drawing force is crucial to the regulation of the counter-tension during the high-speed drawing of the wire, when the fluctuation range of the drawing force is too large, it can cause problems such as local stress concentration, wire breakage, surface quality degradation, and mold wear intensification. Based on this, the drawing force fluctuation range is calculated according to the drawing force before and after the counter-tension regulation; if the calculated drawing force fluctuation range is greater than the set fluctuation range threshold, the traction unit is controlled to reduce the drawing speed until the drawing force fluctuation range is less than or equal to the set fluctuation range threshold. In an embodiment, the set fluctuation range threshold is ±3%, if the calculated drawing force fluctuation range is greater than ±3%, the drawing speed is reduced by reducing the rotation speed of the drawing driving wheel 8 until the drawing force fluctuation range is less than ±3%, wherein the reduction gradient of the drawing speed is 1%-3% V0 / s, V0 is the set initial drawing speed.

[0059] It should be noted that in the present application, the value range of the safety factor β is 0.5-0.7, the regulation gradient of the counter-tension is 0.1%-0.5% q0 / s, and the regulation gradient of the drawing speed is 1%-3% V0 / s, which are the best ranges determined by experimental data. If the step of the regulation gradient of the counter-tension / regulation gradient of the drawing speed is less than this range, the response speed of the dynamic regulation is slower, which affects the production efficiency, and if the step is greater than this range, the optimal counter-tension value can be missed, and even drawing instability can be caused, leading to wire breakage or unstable equipment operation.

[0060] It can be seen that the dynamic regulation method of the high-speed drawing force of the micro-wire provided by the present application can dynamically adjust the counter-tension and the drawing speed during the drawing process by real-time monitoring the change of the drawing force of the wire during the high-speed drawing and combining the preset drawing force range, so that the drawing force and the drawing speed are always maintained within the set optimal range. It can effectively avoid common problems in the drawing process caused by the fluctuation of the drawing force, such as wire breakage, surface defects, and uneven size; and can quickly adjust the drawing force according to different requirements of the micro-wire material, diameter, and drawing speed, to ensure the stability and consistency of the high-speed drawing process, reduce the wire breakage rate by 30%, and significantly improve the surface quality and straightness; since the counter-tension is optimized, the friction between the drawing die and the wire during the drawing process is reduced, and at the same time the drawing force can be maintained within a stable range, so that the drawing die will not be excessively worn due to the fluctuation of the drawing force during the drawing process, thereby prolonging the service life of the drawing die by 20% and reducing the maintenance and replacement costs; in addition, the automatic regulation function reduces the dependence on manual intervention, greatly improving the production efficiency.

[0061] Based on the same inventive concept, the embodiment of the present application also provides a dynamic adjustment device for high-speed drawing force of microfilament. Since the principle of the device in the embodiment of the present application for solving the problem is similar to the above-mentioned method for dynamically adjusting the high-speed drawing force of microfilament, the implementation of the device can be referred to the implementation of the method, and the repeated parts will not be described herein.

[0062] As shown in the accompanying drawings of the specification, Figure 3 The embodiment of the present application provides a dynamic adjustment device for high-speed drawing force of microfilament, which is applied to a dynamic adjustment system for high-speed drawing force of microfilament. The dynamic adjustment system comprises a drawing unit, a traction unit and a tension unit. The wire is wound on the traction unit after passing through the drawing unit, and then passes through the tension unit to the next drawing unit for multi-stage reducing diameter. The drawing unit is provided with a pressure sensor, and the tension unit is provided with a force sensor. The device comprises:

[0063] A driving module 301 is configured to drive the traction unit to generate a drawing force, so as to draw the wire out of the drawing unit under the action of the drawing force and reduce the diameter of the wire.

[0064] A measuring module 302 is configured to measure the drawing resistance generated by the drawing unit in the process of reducing the diameter of the wire in real time based on the pressure sensor, and measure the counter-tension of the wire in the transmission process in real time based on the force sensor.

[0065] An adjusting module 303 is configured to dynamically adjust the currently measured counter-tension according to an established counter-tension control strategy. The counter-tension control strategy comprises a first relationship formula for limiting the counter-tension utilization rate, and a second relationship formula for representing the mapping relationship between the drawing force and the breaking force of the wire after reducing the diameter by the drawing unit.

[0066] In an embodiment, the first relationship formula and the second relationship formula are as follows:

[0067]

[0068] F=M q +q≤βF σ

[0069] Wherein, γ represents the counter-tension utilization rate; M0 represents the drawing resistance generated by the drawing unit when the counter-tension is zero; M q represents the drawing resistance generated by the drawing unit when the counter-tension is q; q represents the counter-tension; a and b respectively represent the lower limit of the counter-tension utilization rate and the upper limit of the counter-tension utilization rate; F represents the drawing force; β represents the safety factor in the drawing process, and the value range is 0.5-0.7; F σ represents the breaking force of the wire after reducing the diameter by the drawing unit.

[0070] In an embodiment, the adjusting module 303 adjusts the current measured counter-tension according to the established counter-tension regulation strategy, including: calculating the counter-tension utilization rate and the drawing force according to the current measured drawing resistance and counter-tension; if the calculated counter-tension utilization rate is less than the set lower limit of the counter-tension utilization rate, or the calculated drawing force is greater than the product of the safety factor β and the breaking force F of the reduced-diameter wire, controlling the tension unit to reduce the counter-tension; if the calculated counter-tension utilization rate is greater than the set upper limit of the counter-tension utilization rate, controlling the tension unit to increase the counter-tension; wherein the tension unit is controlled to reduce or increase the counter-tension according to the set first step size; the first step size is 0.1%~0.5% q0 / s, q0 represents the set initial counter-tension. σ

[0071] In an embodiment, the adjusting module 303 adjusts the current measured counter-tension according to the established counter-tension regulation strategy, further including: calculating the drawing force fluctuation range according to the drawing force before and after the counter-tension adjustment; if the calculated drawing force fluctuation range is greater than the set fluctuation range threshold, controlling the traction unit to reduce the drawing speed until the drawing force fluctuation range is less than or equal to the set fluctuation range threshold; wherein the traction unit is controlled to reduce the drawing speed according to the set second step size; the second step size is 1%~% V0 / s, V0 represents the set initial drawing speed.

[0072] In an embodiment, the measuring module 302 is further used to measure the breaking force of the reduced-diameter wire, including: fixing the reduced-diameter wire in the clamps of the tensile testing machine according to the set gauge length; applying a tensile force to the wire according to the set stretching speed based on the tensile testing machine; recording the tensile force value when the wire breaks, and taking the tensile force value as the measured breaking force.

[0073] ​The application provides a dynamic adjusting device for high-speed drawing force of microfilament, which is applied to a dynamic adjusting system for high-speed drawing force of microfilament. The dynamic adjusting system comprises a drawing unit, a traction unit and a tension unit. The traction unit is driven by a driving module to generate drawing force, so that the wire is drawn out of the drawing unit under the action of the drawing force and is reduced in diameter. A measuring module measures the drawing resistance generated by the drawing unit during the reduction in diameter of the wire based on the pressure sensor in real time, and measures the counter-tension of the wire during transmission based on the force sensor in real time. An adjusting module adjusts the current measured counter-tension according to an established counter-tension control strategy. The counter-tension control strategy comprises a first relationship for limiting the utilization rate of the counter-tension and a second relationship for representing the mapping relationship between the drawing force and the breaking force of the wire after the reduction in diameter by the drawing unit. Thus, the drawing force of the wire is maintained in a stable state during high-speed drawing, the problems such as wire breakage, surface quality defects and die wear are effectively reduced, the production efficiency and the finished product quality of the microfilament are improved, and the service life of the die is prolonged.

[0074] Based on the same concept of the application, the specification attached Figure 4 As shown in the drawings, the electronic device 400 provided by the application comprises at least one processor 401, at least one network interface 404 or other user interface 403, a memory 405 and at least one communication bus 402. The communication bus 402 is used to realize the connection and communication between the components. The electronic device 400 can optionally comprise a user interface 403, including a display (for example, a touch screen, an LCD, a CRT, holographic imaging (Holographic) or a projector (Projector) and the like), a keyboard or a clicking device (for example, a mouse, a trackball, a touchpad or a touch screen and the like).

[0075] The memory 405 can comprise a read-only memory and a random access memory, and provides instructions and data for the processor 401. A part of the memory 405 can also comprise a non-volatile random access memory (NVRAM).

[0076] In some embodiments, the memory 405 stores the following elements, executable modules or data structures, or a subset of them, or an extended set of them:

[0077] The operating system 4051 comprises various system programs, which are used to realize various basic services and process hardware-based tasks;

[0078] The application program module 4052 includes various application programs, such as a launcher, a media player, a browser, and the like, for implementing various application services.

[0079] In the embodiment of the present application, the processor 401 is configured to execute the steps in the method for dynamically adjusting the high-speed drawing force of the microfilament by calling the program or instruction stored in the memory 405, so that the real-time dynamic measurement and adjustment of the drawing force can be realized, and the stability in the high-speed drawing process of the microfilament is improved.

[0080] The present application also provides a computer readable storage medium, and the computer readable storage medium stores a computer program, and the computer program is executed by the processor to perform the steps in the method for dynamically adjusting the high-speed drawing force of the microfilament.

[0081] Specifically, the storage medium can be a general storage medium, such as a mobile disk, a hard disk, and the like, and the computer program stored in the storage medium can be executed to perform the method for dynamically adjusting the high-speed drawing force of the microfilament.

[0082] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some communication interface, and can be electrical, mechanical or other forms.

[0083] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the present embodiment.

[0084] In addition, each functional unit in the embodiments provided in the present application can be integrated into one processing unit, or each unit can exist physically, or two or more units can be integrated into one unit.

[0085] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts of the prior art that make contributions or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0086] Finally, it should be noted that: the above embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily think of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed by the present application, or replace some technical features with equivalent ones. The modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application. They should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for dynamically adjusting the high-speed pulling force of a microfilament, characterized in that: A dynamic adjustment system for high-speed drawing force of microfilaments is provided, the dynamic adjustment system comprising a drawing unit, a traction unit and a tension unit, wherein the wire passes through the drawing unit and is first wound around the traction unit, then passes through the tension unit and passes through the next drawing unit for multi-stage diameter change, and the drawing unit is provided with a pressure sensor, and the tension unit is provided with a force sensor; the dynamic adjustment method comprises the following steps: driving the pulling unit to generate a pulling force, so as to pull the wire out of the pulling unit under the action of the pulling force to reduce the wire diameter; measuring in real time the pulling resistance generated by the pulling unit during the process of reducing the diameter of the wire based on the pressure sensor, and measuring in real time the back tension of the wire during the transmission process based on the force sensor; The currently measured back tension is dynamically adjusted according to the established back tension control strategy; wherein the back tension control strategy includes a first relational expression for limiting back tension utilization, and a second relational expression for representing a mapping relationship between the drawing force and the breaking force of the wire after the wire is reduced in diameter by the drawing unit; the first relational expression and the second relational expression are as follows: in, Indicates the utilization rate of back tension; Indicates the pulling resistance generated by the pulling unit when the back tension is zero; Indicates back tension The pulling resistance generated by the pulling unit when Indicates back tension; a and b indicate the lower limit and upper limit of back tension utilization rate respectively; Indicates pull-out force; Indicates the safety factor during the drawing process; Indicates the breaking force of the wire after the wire is reduced in diameter by the drawing unit; the back tension currently measured is adjusted according to the established back tension control strategy, comprising the following steps: calculating the back tension utilization rate and the drawing force according to the currently measured drawing resistance and back tension; if the calculated back tension utilization rate is less than the set back tension utilization rate lower limit, or the calculated drawing force is greater than the safety factor Tensile strength of wire after diameter reduction , controlling the tension unit to reduce the back tension; if the calculated back tension utilization rate is greater than or equal to the set back tension utilization rate upper limit, controlling the tension unit to increase the back tension; and calculating the pulling force fluctuation range according to the pulling force before and after the back tension adjustment; if the calculated pulling force fluctuation range is greater than the set fluctuation range threshold, controlling the traction unit to reduce the pulling speed until the pulling force fluctuation range is less than or equal to the set fluctuation range threshold.

2. The method for dynamically adjusting the high-speed pulling force of a microfilament according to claim 1, characterized in that: in, Control the tension unit to reduce or increase the back tension according to the set first step; the first step is 0.1%~0.5% / s, Indicates the set initial back tension.

3. The method for dynamically adjusting the high-speed pulling force of a microfilament according to claim 2, characterized in that: in, Control the pulling unit to reduce the pulling speed according to the set second step; the second step is 1%~3% / s, Indicates the set initial pulling speed.

4. The method for dynamically adjusting the high-speed pulling force of a microfilament according to claim 1, characterized in that: The breaking force of the reduced wire is measured by the following method, comprising the following steps: Fix the reduced wire in the fixture of the tensile testing machine according to the set gauge length; Applying tension to the wire based on the tensile testing machine at a set tensile speed; The tensile force value when the thread breaks is recorded and used as the measured breaking force.

5. A dynamic adjustment device for high-speed drawing force of microfilaments, characterized in that: A dynamic adjustment system for high-speed drawing force of microfilaments is provided. The dynamic adjustment system includes a drawing unit, a traction unit, and a tension unit. The filament passes through the drawing unit and is first wound around the traction unit, and then passes through the tension unit and passes through the next drawing unit for multi-stage diameter change. The drawing unit is provided with a pressure sensor, and the tension unit is provided with a force sensor. The device includes: a driving module, configured to drive the traction unit to generate a pulling force, so as to pull the wire out of the drawing unit under the action of the pulling force to reduce the wire diameter; a measuring module, configured to measure in real time based on the pressure sensor the pulling resistance generated by the pulling unit during the diameter reduction process of the wire, and to measure in real time based on the force sensor the back tension of the wire during the transmission process; An adjustment module is configured to dynamically adjust the currently measured back tension according to an established back tension control strategy; wherein the back tension control strategy includes a first relational expression for limiting back tension utilization, and a second relational expression for representing a mapping relationship between the drawing force and the breaking force of the wire after the wire is reduced in diameter by the drawing unit; the first relational expression and the second relational expression are as follows: in, Indicates the utilization rate of back tension; Indicates the pulling resistance generated by the pulling unit when the back tension is zero; Indicates back tension The pulling resistance generated by the pulling unit when Indicates back tension; a and b indicate the lower limit and upper limit of back tension utilization rate respectively; Indicates pull-out force; Indicates the safety factor during the drawing process; Indicates the breaking force of the wire after the wire is reduced in diameter by the drawing unit; the back tension currently measured is adjusted according to the established back tension control strategy, including: calculating the back tension utilization rate and the pulling force according to the currently measured pulling resistance and back tension; if the calculated back tension utilization rate is less than the set back tension utilization rate lower limit, or the calculated pulling force is greater than the safety factor Tensile strength of wire after diameter reduction , controlling the tension unit to reduce the back tension; if the calculated back tension utilization rate is greater than or equal to the set back tension utilization rate upper limit, controlling the tension unit to increase the back tension; and calculating the pulling force fluctuation range according to the pulling force before and after the back tension adjustment; if the calculated pulling force fluctuation range is greater than the set fluctuation range threshold, controlling the traction unit to reduce the pulling speed until the pulling force fluctuation range is less than or equal to the set fluctuation range threshold.

6. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor and the memory communicate via the bus. When the machine-readable instructions are executed by the processor, the steps of the method for dynamically adjusting the high-speed pulling force of a micro-filament are performed as described in any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that The computer readable storage medium stores a computer program, which, when executed by a processor, executes the steps of the method for dynamically adjusting the high-speed drawing force of a microfilament according to any one of claims 1 to 4.

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