Copper wire drawing process quality control method based on acoustic emission signals

Abstract

The invention belongs to the technical field of copper wire drawing, and particularly relates to a copper wire drawing process quality control method based on acoustic emission signals, which comprises the following steps: controlling a drawing machine to draw a sample copper wire according to default drawing setting; detecting a first acoustic emission signal of an undrawn part of the sample copper wire, and detecting a second acoustic emission signal of a drawn part of the sample copper wire; adjusting the drawing setting according to the second acoustic emission signal; determining a sound intensity transfer coefficient according to the ratio of the first acoustic emission signal to the second acoustic emission signal; and the drawing machine is controlled to draw the copper wire according to the adjusted drawing setting, a third acoustic emission signal and a fourth acoustic emission signal of the copper wire being drawn are detected on line, and a fine adjustment mode of the drawing setting is obtained according to the third acoustic emission signal, the fourth acoustic emission signal and the sound intensity transfer coefficient. The method can solve the problem that in the prior art, the drawing amount and the drawing speed in the drawing process are determined through experience of workers, and consequently the wire drawing result is unstable.

Description

Technical Field

[0001] This application belongs to the technical field of copper wire drawing, and particularly relates to a quality control method for the copper wire drawing process based on acoustic emission signals. Background Art

[0002] Copper wire is the most widely used conductor in various fields at present. The process of manufacturing copper wire is called the copper wire drawing process, and the quality control method for the copper wire drawing process is a method for controlling the copper wire drawing process to improve the quality of copper wire.

[0003] During the copper wire drawing process, it is inevitable to cause stress concentration and work hardening of the copper wire, resulting in a decrease in the plasticity of the copper wire, and thus making the copper wire more likely to break during the drawing process. In the prior art, the drawing amount and drawing speed of the drawing process are often determined by the experience of workers, and online annealing is carried out after drawing. After multiple passes of wire drawing, the target copper wire is obtained. However, the quality of the lubricating fluid, the quality of the copper wire raw material, and the processing environment, etc. during the wire drawing process will all affect the drawing quality of the wire drawing process. Therefore, determining the drawing amount and drawing speed of the drawing process by the experience of workers will result in a very unstable drawing result (the stress concentration points in the copper wire are uneven). Therefore, a quality control method for the copper wire drawing process is needed to obtain the ideal drawing amount and drawing speed of the wire drawing process. Summary of the Invention

[0004] The embodiments of this application provide a quality control method and device for the copper wire drawing process based on acoustic emission signals, which can solve the problem that the prior art determines the drawing amount and drawing speed of the drawing process by the experience of workers, resulting in an unstable drawing result.

[0005] In the first aspect, the embodiments of this application provide a quality control method for the copper wire drawing process based on acoustic emission signals, which is applied to a quality control device for the copper wire drawing process. The quality control device for the copper wire drawing process is communicatively connected to a drawing machine. The quality control device for the copper wire drawing process can control the drawing settings of the drawing machine and can also detect the acoustic emission signals of the copper wire. The method includes: Controlling the drawing machine to draw a sample copper wire with the default drawing settings; wherein, only a part of the sample copper wire is drawn, that is, the sample copper wire includes an undrawn part and a drawn part; Detecting the first acoustic emission signal of the undrawn part of the sample copper wire and detecting the second acoustic emission signal of the drawn part of the sample copper wire; Adjusting the drawing settings according to the second acoustic emission signal; Determining the acoustic intensity transfer coefficient according to the ratio of the first acoustic emission signal to the second acoustic emission signal; wherein, the acoustic intensity transfer coefficient is used to reflect the attenuation ratio of the acoustic emission signal after the acoustic emission signal in the drawn part is transmitted to the undrawn part; Control the drawing machine to draw the copper wire with the adjusted drawing settings, and online detect the third acoustic emission signal and the fourth acoustic emission signal of the copper wire being drawn. Based on the third acoustic emission signal, the fourth acoustic emission signal, and the acoustic intensity transfer coefficient, fine-tune the drawing settings in real time; wherein, the detection position of the third acoustic emission signal is on the undrawn copper wire, and the detection position of the fourth acoustic emission signal is on the drawn copper wire.

[0006] In the technical solution described above in the embodiments of the present application, at least the following technical effects are achieved: In a method for quality control of the copper wire drawing process based on acoustic emission signals provided by the present application, first, control the drawing machine to draw a sample copper wire with the default drawing settings. The sample copper wire includes an undrawn part and a drawn part. In this step, the default drawing settings are used as the reference value first, so that the subsequent steps can adjust the drawing settings based on this reference value. Secondly, detect the first acoustic emission signal of the undrawn part of the sample copper wire and the second acoustic emission signal of the drawn part of the sample copper wire. In this step, the acoustic emission signals of the sample copper wire are detected in two parts, which is beneficial for subsequent steps to perform data processing on the acoustic emission signals. Subsequently, adjust the drawing settings according to the second acoustic emission signal. In this step, a static first rough adjustment is performed on the drawing settings of the drawing machine according to the second acoustic emission signal. Then, determine the acoustic intensity transfer coefficient according to the ratio of the first acoustic emission signal to the second acoustic emission signal. In this step, obtaining the acoustic intensity transfer coefficient is beneficial for subsequent separation of the acoustic emission signals emitted by the stress concentration points. Finally, control the drawing machine to draw the copper wire with the adjusted drawing settings, and online detect the third acoustic emission signal and the fourth acoustic emission signal of the copper wire being drawn. According to the third acoustic emission signal, the fourth acoustic emission signal, and the acoustic intensity transfer coefficient, obtain the fine-tuning method of the drawing settings. In this step, first draw the copper wire with the roughly adjusted drawing settings, and online detect the third acoustic emission signal and the fourth acoustic emission signal of the copper wire. Combine the third acoustic emission signal and the fourth acoustic emission signal, and the acoustic intensity transfer coefficient to separate the acoustic emission signals of the stress concentration points in the copper wire, and perform online dynamic fine-tuning on the drawing settings according to the acoustic intensity of the acoustic emission signals of the stress concentration points in the copper wire, so as to obtain the ideal drawing amount and drawing speed during the wire drawing process. In this method, first draw a section of sample copper wire, perform a static first rough adjustment after detecting the acoustic emission signals, then draw the copper wire with the roughly adjusted drawing settings, and online detect the acoustic emission signals. Combine the corresponding data to perform dynamic continuous fine-tuning on the drawing settings, and the ideal drawing amount and drawing speed during the wire drawing process can be obtained, which can solve the problem that the existing technology determines the drawing amount and drawing speed during the drawing process through the experience of workers, resulting in unstable wire drawing results.

[0007] In the second aspect, the embodiments of the present application provide a device for quality control of the copper wire drawing process, including: A first control unit for controlling the drawing machine to draw a part of a sample copper wire with a default drawing setting; wherein, the drawn sample copper wire includes an undrawn part and a drawn part; A detection unit for detecting a first acoustic emission signal of the undrawn part of the sample copper wire and detecting a second acoustic emission signal of the drawn part of the sample copper wire; An adjustment unit for adjusting the drawing setting according to the second acoustic emission signal; A calculation unit for determining an acoustic intensity transfer coefficient according to the ratio of the first acoustic emission signal to the second acoustic emission signal; wherein, the acoustic intensity transfer coefficient is used to reflect the attenuation ratio of the acoustic emission signal after the acoustic emission signal in the drawn part is transmitted to the undrawn part; A second control unit for controlling the drawing machine to draw the copper wire with the adjusted drawing setting, and online detecting a third acoustic emission signal and a fourth acoustic emission signal of the copper wire being drawn, and obtaining a fine-tuning method of the drawing setting according to the third acoustic emission signal, the fourth acoustic emission signal and the acoustic intensity transfer coefficient; wherein, the detection position of the third acoustic emission signal is on the undrawn copper wire, and the detection position of the fourth acoustic emission signal is on the drawn copper wire.

[0008] In a third aspect, an embodiment of the present application provides a quality control device for the copper wire drawing process, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein, when the processor executes the computer program, the method described in any one of the above first aspects is implemented.

[0009] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the method described in any one of the above first aspects is implemented.

[0010] In a fifth aspect, an embodiment of the present application provides a computer program product, when the computer program product runs on a quality control device for the copper wire drawing process, enabling the quality control device for the copper wire drawing process to execute the method for quality control of the copper wire drawing process based on acoustic emission signals described in any one of the above first aspects.

[0011] It can be understood that the beneficial effects of the above second aspect to the fifth aspect can refer to the relevant descriptions in the above first aspect, and will not be elaborated here. Description of the Drawings

[0012] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 is a schematic flowchart of a quality control method for the copper wire drawing process provided by an embodiment of the present application; Figure 2 is a schematic structural diagram of a quality control device for the copper wire drawing process provided by an embodiment of the present application; Figure 3 is a schematic structural diagram of a quality control device for the copper wire drawing process provided by an embodiment of the present application. Detailed implementation manners

[0014] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are proposed to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0015] It should be understood that when used in the specification and the appended claims of the present application, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0016] It should also be understood that the term "and / or" used in the specification and the appended claims of the present application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0017] As used in the specification and the appended claims of the present application, the term "if" can be interpreted as "when", "once", "in response to determining", or "in response to detecting" according to the context. Similarly, the phrase "if determined" or "if detecting [the described condition or event]" can be interpreted as meaning "once determined", "in response to determining", "once detecting [the described condition or event]", or "in response to detecting [the described condition or event]" according to the context.

[0018] In addition, in the description of the specification and the appended claims of the present application, the terms "first", "second", "third", etc. are only used for differentiating descriptions and cannot be understood as indicating or implying relative importance.

[0019] Reference to "one embodiment" or "some embodiments" etc. described in the specification of the present application means that a specific feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0020] In the related art, during the copper wire drawing process, the stress concentration and work hardening of the copper wire will inevitably occur, resulting in a decrease in the plasticity of the copper wire, and thus making the copper wire more likely to break during the drawing process. In the prior art, the drawing amount and drawing speed of the wire drawing process are often determined by the experience of workers, and online annealing is carried out after drawing. After multiple passes of wire drawing, the target copper wire is obtained. However, the quality of the lubricating fluid, the quality of the copper wire raw material, and the processing environment, etc. during the wire drawing process will all affect the drawing quality of the wire drawing process. Therefore, determining the drawing amount and drawing speed of the drawing process by the experience of workers will result in a very unstable drawing result (the stress concentration points in the copper wire are uneven). Therefore, a quality control method for the copper wire drawing process is needed to obtain the ideal drawing amount and drawing speed of the wire drawing process.

[0021] To solve the above problems, an embodiment of the present application provides a method for quality control of the copper wire drawing process based on acoustic emission signals. In this method, first, the drawing machine is controlled to draw a sample copper wire with default drawing settings. The sample copper wire includes an undrawn part and a drawn part. In this step, the default drawing settings are used as the reference value first, so that the drawing settings can be adjusted based on this reference value in subsequent steps. Secondly, the first acoustic emission signal of the undrawn part of the sample copper wire is detected, and the second acoustic emission signal of the drawn part of the sample copper wire is detected. In this step, the acoustic emission signals of the sample copper wire are detected in two parts, which is beneficial for subsequent steps to perform data processing on the acoustic emission signals. Subsequently, the drawing settings are adjusted according to the second acoustic emission signal. In this step, a static first rough adjustment is performed on the drawing settings of the drawing machine according to the second acoustic emission signal. Then, according to the ratio of the first acoustic emission signal to the second acoustic emission signal, the acoustic intensity transfer coefficient is determined. In this step, obtaining the acoustic intensity transfer coefficient is beneficial for subsequent separation of the acoustic emission signals emitted from stress concentration points. Finally, the drawing machine is controlled to draw the copper wire with the adjusted drawing settings, and the third acoustic emission signal and the fourth acoustic emission signal of the copper wire being drawn are detected online. According to the third acoustic emission signal, the fourth acoustic emission signal, and the acoustic intensity transfer coefficient, the fine-tuning method of the drawing settings is obtained. In this step, the copper wire is first drawn with the roughly adjusted drawing settings, and the third acoustic emission signal and the fourth acoustic emission signal of the copper wire are detected online. Combining the third acoustic emission signal and the fourth acoustic emission signal, as well as the acoustic intensity transfer coefficient, the acoustic emission signals of the stress concentration points inside the copper wire are separated, and the drawing settings are dynamically and continuously fine-tuned online according to the acoustic intensity of the acoustic emission signals of the stress concentration points inside the copper wire to obtain the ideal drawing amount and drawing speed during the wire drawing process. In this method, a section of sample copper wire is first drawn, and after detecting the acoustic emission signals, a static first rough adjustment is performed. Subsequently, the copper wire is drawn with the roughly adjusted drawing settings, and the acoustic emission signals are detected online. Combining the corresponding data, the drawing settings are dynamically and continuously fine-tuned, and the ideal drawing amount and drawing speed during the wire drawing process can be obtained, which can solve the problem that the drawing amount and drawing speed of the existing technology are determined by experience during the drawing process, resulting in unstable wire drawing results.

[0022] The method for quality control of the copper wire drawing process based on acoustic emission signals provided by the embodiment of the present application can be applied to the quality control equipment for the copper wire drawing process. At this time, the quality control equipment for the copper wire drawing process is the execution subject of the method for quality control of the copper wire drawing process based on acoustic emission signals provided by the embodiment of the present application. The embodiment of the present application does not impose any restrictions on the specific type of the quality control equipment for the copper wire drawing process.

[0023] For example, the quality control device for the copper wire drawing process may include a detection device, a communication device, and a control device. The communication device is communicatively connected to an external drawing machine, and the control device is communicatively connected to the detection device and the communication device. The detection device may be various acoustic emission signal sensors, and the communication device may be various communication buses. The control device can control the detection device to detect the first acoustic emission signal, the second acoustic emission signal, the third acoustic emission signal, and the fourth acoustic emission signal of the copper wire, can also control the communication device to connect to the drawing machine and adjust the drawing settings of the drawing machine, and can also perform data calculation to obtain the acoustic intensity transfer coefficient.

[0024] The control device can be a single-chip microcomputer, a mobile phone, a tablet computer, a laptop computer, a desktop computer, a computing device, or other processing devices connected to a wireless modem, a computer, etc.

[0025] To better understand the quality control method for the copper wire drawing process based on acoustic emission signals provided in the embodiments of the present application, the following provides an exemplary introduction to the specific implementation process of the quality control method for the copper wire drawing process based on acoustic emission signals provided in the embodiments of the present application.

[0026] Figure 1 The schematic flowchart of the quality control method for the copper wire drawing process based on acoustic emission signals provided in the embodiments of the present application is shown. The quality control method for the copper wire drawing process based on acoustic emission signals includes: S100, controlling the drawing machine to draw a part of the sample copper wire with the default drawing settings. Among them, the drawn sample copper wire includes an undrawn part and a drawn part.

[0027] It can be understood that first, the quality control device for the copper wire drawing process allows the drawing machine to draw a section of sample copper wire with the default drawing settings. The drawing settings include the drawing speed and the drawing amount of the drawing machine. The default drawing settings can be the preliminary drawing speed and the preliminary drawing amount determined according to the experience of the staff. The sample copper wire can be a section of copper wire cut from the copper wire to be processed, or it can be directly used as the sample copper wire without cutting, taking the beginning section of the copper wire to be processed as the sample copper wire. A part of the sample copper wire is drawn by the drawing machine and can be divided into an undrawn part and a drawn part. After the drawn part is drawn, there are stress concentration points inside it, which can generate acoustic emission signals. Although there are no stress concentration points in the undrawn part of the sample copper wire, since the undrawn part and the drawn part belong to the same sample copper wire, the acoustic emission signals generated by the stress concentration points in the drawn part can also be detected on the undrawn part of the sample copper wire, but the interval is farther, resulting in a smaller acoustic intensity.

[0028] With such a setting, a section of sample copper wire is processed with the default drawing settings first, so as to analyze the sample copper wire and then adjust the drawing settings later.

[0029] S200, detect the first acoustic emission signal of the non-drawn part of the sample copper wire and the second acoustic emission signal of the drawn part of the sample copper wire.

[0030] It can be understood that the acoustic emission signals of the non-drawn part and the drawn part of the sample copper wire are detected separately. The probe for detecting the acoustic emission signal can be a ring probe (the ring probe converts the acoustic emission signal (mechanical wave) on the copper wire into an electrical signal). The ring probe tightly clamps the sample copper wire, and the ring probe needs to have a certain inward converging force and elasticity to adapt to copper wires of different diameters. One ring probe detects the non-drawn part of the sample copper wire to obtain the first acoustic emission signal, and the other ring probe detects the drawn part of the sample copper wire (if the two probes are too close, the two acoustic emission signals cannot be distinguished; if they are too far, the transmission time difference of the acoustic emission signal is too large. Therefore, the distance between the two ring probes can be 1m - 5m) to obtain the second acoustic emission signal. Both the first acoustic emission signal and the second acoustic emission signal are waveform signals of the sound intensity amplitude - time collected by the sensor.

[0031] It should be noted that the detection of the first acoustic emission signal and the second acoustic emission signal is carried out after the sample copper wire is drawn. At this time, the drawing machine is in a stopped state (the drawing machine stops after drawing the sample copper wire) and will not be affected by the working vibration of the drawing machine.

[0032] With such a setting, the first acoustic emission signal and the second acoustic emission signal can be obtained stably.

[0033] S300, adjust the drawing settings according to the second acoustic emission signal.

[0034] It can be understood that the second acoustic emission signal is the acoustic emission signal directly detecting the stress concentration points in the sample copper wire, which can directly reflect the stress concentration situation of the sample copper wire after drawing with the default drawing settings. By analyzing the stress concentration situation of the drawn sample copper wire and adjusting the drawing settings of the drawing machine, the stress concentration in the copper wire after drawing can be reduced. The drawing settings of the drawing machine have two key settings: drawing speed and drawing amount. The drawing speed refers to the speed of drawing the copper wire, and the drawing amount is used to represent the compression degree of the copper wire during the drawing process. The drawing amount can be the difference in the surface area of the copper wire before and after drawing (used to reflect the compression degree of the copper wire during the drawing process). The faster the drawing speed and the greater the compression degree of the copper wire indicated by the drawing amount, the more and larger stress concentration points will exist in the drawn copper wire, and the second acoustic emission signal will show more frequent activity and greater sound intensity. Therefore, an activity parameter can be set to represent the activity degree of the second acoustic emission signal (the activity degree is proportional to the signal activity frequency and sound intensity), and a recommended value can be set simultaneously (when the activity parameter is equal to the recommended value, the copper wire quality and the copper wire production speed reach the ideal balance of the user). According to the gap between the activity parameter and the recommended value, adjust the drawing speed and drawing amount of the drawing machine (if the activity parameter is greater than the recommended value, reduce the drawing speed and drawing amount, and vice versa. The amount of increase or decrease is proportional to the difference between the activity parameter and the recommended value), so that the drawn copper wire has a stable stress concentration situation (i.e., stable copper wire quality), which is conducive to the stable annealing of the copper wire and prevents the occurrence of over-annealing or under-annealing situations.

[0035] With such settings, the drawing machine can complete the first rough adjustment of the drawing settings and initially achieve quality control in the copper wire drawing process.

[0036] In a possible implementation manner, in step S300, adjusting the drawing settings according to the second acoustic emission signal includes: S310, obtaining a first signal activity parameter according to the second acoustic emission signal. Among them, the first signal activity parameter is used to reflect the activity degree of the second acoustic emission signal.

[0037] It can be understood that when the signal activity frequency is more frequent and the sound intensity is greater, the area enclosed by the second acoustic emission signal and the x-axis will also be larger. Therefore, the integral of the second acoustic emission signal can be used to represent the first signal activity parameter. So, the definite integral of the second acoustic emission signal can be obtained to get the first signal activity parameter, and the integral can also be normalized to standardize the first signal activity parameter. A reference value can be set, and the ratio of the definite integral of the second acoustic emission signal to the reference value is used as the first signal activity parameter.

[0038] With such settings, the activity degree of the second acoustic emission signal can be effectively represented.

[0039] S320. Obtain the active parameter threshold input by the user or the default one.

[0040] It can be understood that the active parameter threshold input by the user can be received through ways such as a knob, a button or a touch screen, etc. When the user does not input, the default active parameter threshold can also be adopted. The default active parameter threshold can be the active parameter threshold used when processing copper wires of the same specification last time, or the active parameter threshold preset by the manufacturer at the time of factory.

[0041] With such a setting, the drawing settings expected by the user can be represented by the active parameter threshold.

[0042] Optionally, the method further includes: S321. When it is detected that the user adjusts the active parameter threshold after the drawing machine has been started, determine the adjustment amount of the active parameter threshold. If the adjustment amount of the active parameter threshold is greater than the third threshold, start from the beginning the quality control method for the copper wire drawing process based on the acoustic emission signal.

[0043] It can be understood that the user can adjust the active parameter threshold when the drawing machine is not started, or can also adjust the active parameter threshold when the drawing machine is started. When the user adjusts the active parameter threshold when the drawing machine is started, the adjustment amount of the active parameter threshold can be detected first. When the adjustment amount of the active parameter threshold is greater than a certain threshold, it means that the adjustment of the active parameter threshold is too large, resulting in the invalidation of the result of the first rough adjustment. At this time, the drawing machine can be stopped, and then the first rough adjustment of the drawing settings can be carried out again, that is, start the first step of this method again.

[0044] With such a setting, the function of this method regarding the adjustment of the active parameter threshold can be improved.

[0045] S330. Obtain the target drawing settings according to the first-signal active parameter, the active parameter threshold and the default drawing settings, and adjust the drawing settings according to the target drawing settings.

[0046] It can be understood that this adjustment of the drawing settings is the first rough adjustment, and various errors and environmental influences can be ignored. Because the first-signal active parameter reflects the activity degree of the second acoustic emission signal, and the second acoustic emission signal is the acoustic emission signal collected after the drawing machine draws the sample copper wire with the default drawing settings, there is a certain functional relationship between the first-signal active parameter and the default drawing settings, that is, f1(default drawing settings)=first-signal active parameter. Similarly, it can be thought that there is also such a functional relationship between the target drawing settings and the active parameter threshold, that is, f1(target drawing settings)=active parameter threshold. Therefore, the relational expression , can be according to The target drawing setting is obtained from the relational expression. The values of the default drawing setting and the target drawing setting can be quantified as the drawing amount per unit time (which is expressed as the drawing speed corresponding to the drawing setting × the drawing amount). After obtaining the target drawing setting, the drawing speed and the drawing amount can be adjusted simultaneously (expressed as a drawing speed × a drawing amount, where a is the common adjustment parameter for the drawing speed and the drawing amount, and a² = ), so that the adjusted drawing setting is the target drawing setting.

[0047] With such a setting, the first rough adjustment can be made as close as possible to the final drawing setting.

[0048] S400. Determine the sound intensity transfer coefficient according to the ratio of the first acoustic emission signal to the second acoustic emission signal. The sound intensity transfer coefficient is used to reflect the attenuation ratio of the acoustic emission signal after the acoustic emission signal in the drawn part is transmitted to the undrawn part.

[0049] It can be understood that the average sound intensity of the first acoustic emission signal can be divided by the average sound intensity of the second acoustic emission signal to obtain the sound intensity transfer coefficient (the sound intensity transfer coefficient is used to reflect the attenuation ratio of the acoustic emission signal after the acoustic emission signal in the drawn part is transmitted to the undrawn part). The sound intensity transfer coefficient is greater than 0 and less than 1. When detecting the first acoustic emission signal and the second acoustic emission signal, the drawing machine is stopped. Therefore, the second acoustic emission signal = ambient noise 2 + acoustic emission signal at the stress concentration point, and the first acoustic emission signal = ambient noise 1 + k × acoustic emission signal at the stress concentration point, where k is the sound intensity transfer coefficient. Since the detection positions of the first acoustic emission signal and the second acoustic emission signal are in the same result environment, ambient noise 1 and ambient noise 2 can be regarded as the same noise. A special acoustic emission signal detection point can also be set up on the drawing machine to specifically detect the ambient noise (the sample copper wire is on the stopped drawing machine, so the same ambient noise can also be detected on the drawing machine). Subtract this noise from the first acoustic emission signal and the second acoustic emission signal simultaneously to obtain two signals: (k × acoustic emission signal at the stress concentration point) and (acoustic emission signal at the stress concentration point). Then, find the average amplitude of the two acoustic intensity amplitude-time waveform signals, and divide the two average amplitudes to obtain the value of the sound intensity transfer coefficient k.

[0050] With such a setting, the sound intensity transfer coefficient can be obtained stably.

[0051] S500. Control the drawing machine to draw the copper wire with the adjusted drawing setting, and online detect the third acoustic emission signal and the fourth acoustic emission signal of the copper wire being drawn. Based on the third acoustic emission signal, the fourth acoustic emission signal, and the sound intensity transfer coefficient, fine-tune the drawing setting in real time. The detection position of the third acoustic emission signal is on the undrawn copper wire, and the detection position of the fourth acoustic emission signal is on the drawn copper wire.

[0052] It can be understood that after obtaining the rough-adjusted drawing settings, the drawing machine is controlled to draw the copper wire with the rough-adjusted drawing settings. However, the rough-adjusted drawing settings are static and depend on the quality of the sample copper wire selected at that time and the state of the drawing machine during the processing of the sample copper wire. They cannot dynamically adjust the drawing settings according to different copper wire qualities and different states of the drawing machine. Therefore, the third acoustic emission signal and the fourth acoustic emission signal of the copper wire are detected online (the third acoustic emission signal corresponds to the first acoustic emission signal, and the fourth acoustic emission signal corresponds to the second acoustic emission signal. That is, in the copper wire where the stress concentration point generated by drawing is at the detection position of the fourth acoustic emission signal, the difference is that the drawing machine is running). At this time, the third acoustic emission signal = drawing machine noise + ambient noise 1 + k × acoustic emission signal of the stress concentration point, and the fourth acoustic emission signal = drawing machine noise + ambient noise 2 + acoustic emission signal of the stress concentration point. ((Fourth acoustic emission signal - Third acoustic emission signal) / (1 - k)) = acoustic emission signal of the stress concentration point. A sound intensity reference value can be set. When the sound intensity of the acoustic emission signal of the stress concentration point is greater than this sound intensity reference value, the drawing settings of the drawing machine are adjusted accordingly (because the drawing machine is already running at this time and the drawing die cannot be replaced, so the drawing amount cannot be adjusted. Therefore, the drawing speed of the drawing machine is reduced). When the acoustic emission signal of the stress concentration point is less than this sound intensity reference value, the drawing settings of the drawing machine are adjusted accordingly (the drawing speed of the drawing machine is increased), so as to realize a quality control method for the copper wire drawing process with dynamic adjustment, and the drawing speed of the drawing machine can be reduced or increased at a fixed rate, or the adjustment rate can be dynamically determined to reduce or increase the drawing speed of the drawing machine.

[0053] With such settings, during the copper wire drawing process, the drawing settings of the drawing machine can be dynamically adjusted according to external factors, so that the stress concentration level of the copper wire is maintained near a reference, realizing a quality control method for the copper wire drawing process.

[0054] In a possible implementation manner, in step S500, according to the third acoustic emission signal, the fourth acoustic emission signal, and the sound intensity transfer coefficient, the fine-tuning method of the drawing settings is obtained, including: S510, every first time interval, according to the third acoustic emission signal, the fourth acoustic emission signal, and the sound intensity transfer coefficient at that time, obtain the acoustic emission signal of the stress concentration point in the copper wire at that time.

[0055] It can be understood that since the fine-tuning process is dynamic and continuous, the third acoustic emission signal and the fourth acoustic emission signal of the copper wire also need to be continuously and dynamically acquired. Therefore, the third acoustic emission signal and the fourth acoustic emission signal of the copper wire are acquired every first time interval, and according to the formula: Acoustic emission signal at stress concentration point = (Fourth acoustic emission signal - Third acoustic emission signal) / (1 - Sound intensity transfer coefficient), the acoustic emission signal at the stress concentration point in the copper wire at that time is calculated. It should be noted that the third acoustic emission signal and the fourth acoustic emission signal also have a duration rather than being instantaneous. If the duration of the acquired third acoustic emission signal and fourth acoustic emission signal is 10 ms, then the first duration must be greater than 10 ms. For example, the first duration can be 100 ms. At this time, the process of collecting acoustic emission signals is: Collect the third acoustic emission signal and the fourth acoustic emission signal for 10 ms -> Wait for 90 ms -> Collect the third acoustic emission signal and the fourth acoustic emission signal for 10 ms again... and so on in a cycle.

[0056] With such a setting, dynamically acquiring the third acoustic emission signal and the fourth acoustic emission signal is beneficial for real-time fine-tuning of the drawing settings.

[0057] S520, Obtain the second signal activity parameter according to the acoustic emission signal at the stress concentration point. Among them, the second signal activity parameter is used to reflect the activity degree of the acoustic emission signal at the stress concentration point.

[0058] It can be understood that the same as the step of obtaining the first signal activity parameter, first, the definite integral of the acoustic emission signal at the stress concentration point can be obtained to get the second signal activity parameter, and the integral can also be normalized to standardize the second signal activity parameter. A reference value can be set, and the ratio of the definite integral of the acoustic emission signal at the stress concentration point to this reference value is used as the second signal activity parameter. Since an acoustic emission signal at the stress concentration point is obtained every first time interval, a second signal activity parameter is also obtained every first time interval.

[0059] With such a setting, the activity degree of the acoustic emission signal at the stress concentration point is effectively represented.

[0060] S530, When the second signal activity parameters for consecutive n times are all greater than or all less than the activity parameter threshold, calculate the average value of the n second signal activity parameters, and obtain the target drawing setting based on the average value of the n second signal activity parameters, the activity parameter threshold, and the current drawing setting, and obtain the fine-tuning method of the drawing setting with the target drawing setting as the target. Among them, n is a preset positive integer.

[0061] It can be understood that the process of dynamic fine-tuning is to continuously compare the newly obtained second signal activity parameter with the activity parameter threshold. When the second signal activity parameter is greater than the activity parameter threshold, the second signal activity parameter is adjusted downward (i.e., the product of the drawing speed and the drawing amount is adjusted downward). Conversely, it is adjusted upward. However, if the drawing settings are frequently fine-tuned, it will lead to an unstable wire drawing process and increase the possibility of wire breakage. Therefore, an n value is set. When the second signal activity parameter is greater than or less than the activity parameter threshold for n consecutive times, the drawing settings are adjusted, and the target drawing settings are determined according to the relationship of . (The values of the current drawing settings and the target drawing settings can be the drawing amount per unit time, i.e., the drawing speed × the drawing amount). Since the drawing amount of the copper wire cannot be changed during wire drawing (only the drawing speed can be changed), after determining the target drawing settings, only the drawing speed can be changed to make the current drawing settings become the target drawing settings. The speed of changing the drawing speed is determined by the difference between the current drawing settings and the target drawing settings. Suppose the difference between the current drawing settings and the target drawing settings is A1. Then, when adjusting the drawing settings, the drawing speed changes at a speed of . It should be noted that the drawing settings are unstable during the change of the drawing speed. When the drawing settings are unstable, the acquisition of the third acoustic emission signal and the fourth acoustic emission signal can be stopped.

[0062] With such settings, the function of dynamically fine-tuning the drawing settings can be realized, enabling the method to obtain the ideal drawing amount and drawing speed during the wire drawing process.

[0063] Optionally, when the acoustic emission signals of the stress concentration points obtained continuously for n times all meet the first condition, the wire drawing machine is temporarily stopped every first time period, and the third acoustic emission signal and the fourth acoustic emission signal are detected during the downtime of the wire drawing machine. Here, the first condition refers to that the ratio of the average acoustic intensity of the acoustic emission signal of the stress concentration point to the average acoustic intensity of the fourth acoustic emission signal at that time is less than the first threshold.

[0064] It can be understood that the fourth acoustic emission signal = drawing machine noise + environmental noise 2 + acoustic emission signal at the stress concentration point. In actual applications, there may be a situation where the sound intensity of the drawing machine noise is much greater than that of the acoustic emission signal at the stress concentration point, resulting in serious distortion of the collected third and fourth acoustic emission signals. This situation will occur in the micro-drawing or ultra-micro-drawing stage (the drawing amount is very small, resulting in a very small acoustic emission signal at the stress concentration point). At this time, the third and fourth acoustic emission signals can be detected by stopping the machine (to eliminate the influence of the drawing machine noise). The average sound intensity of the acoustic emission signal at the stress concentration point / the average sound intensity of the fourth acoustic emission signal can be compared with the first threshold. When it is smaller than the first threshold, it means that the average sound intensity of the acoustic emission signal at the stress concentration point is too small, and it is necessary to stop the machine to detect the third and fourth acoustic emission signals. And to prevent sudden situations (such as the sudden decrease of the drawing machine noise at a certain moment), only when the ratio of the average sound intensity of the acoustic emission signal at the stress concentration point to the average sound intensity of the fourth acoustic emission signal at the corresponding moment is less than the first threshold for n consecutive times, will the machine stop to detect the third and fourth acoustic emission signals.

[0065] With such a setting, it is possible to prevent the lack of accuracy of the results obtained by this method in a special case.

[0066] Optionally, a sensor is provided inside the driving pulley of the drawing machine. When the drawing machine is drawing copper wire, the third and fourth acoustic emission signals of the copper wire are detected through the sensor inside the driving pulley, and there is no relative sliding between the driving pulley and the copper wire.

[0067] It can be understood that in step S200, the first and second acoustic emission signals are detected through an annular probe that clamps the copper wire. Since the copper wire is stationary when detecting the first and second acoustic emission signals, and the copper wire is moving when detecting the third and fourth acoustic emission signals, if the annular probe continues to be used to detect the third and fourth acoustic emission signals, there will be friction between the annular probe and the copper wire, which will inevitably make the measured third and fourth acoustic emission signals inaccurate. Therefore, the copper wire can be wound around a pulley. When the copper wire moves during drawing, the pulley rotates synchronously, so that there is no relative sliding between the copper wire and the pulley, and a sensor is provided in the ramp of the pulley to detect the third and fourth acoustic emission signals of the copper wire.

[0068] With such a setting, the accuracy of the measured third and fourth acoustic emission signals can be improved.

[0069] Optionally, the method further includes: S610, subtracting the first acoustic emission signal from the second acoustic emission signal to obtain a main signal, and the frequency domain where the main signal is located is the main frequency domain.

[0070] It can be understood that the second acoustic emission signal = ambient noise 2 + acoustic emission signal at the stress concentration point, the first acoustic emission signal = ambient noise 1 + k × acoustic emission signal at the stress concentration point (it can be considered that ambient noise 2 is the same as ambient noise 1), k is the sound intensity transfer coefficient. Subtracting the first acoustic emission signal from the second acoustic emission signal, we get (1 - k) × acoustic emission signal at the stress concentration point (i.e., the main signal). 1 - k is a constant and does not affect the frequency domain of the acoustic emission signal at the stress concentration point. At this time, the frequency domain of the main signal is the same as the frequency domain of the acoustic emission signal at the stress concentration point. The frequency domain where the main signal is located is defined as the main frequency domain, and the signals outside the main frequency domain can all be regarded as noise signals.

[0071] With such a setting, frequency domain filtering can be performed on the acoustic emission signal, improving the accuracy of the obtained acoustic emission signal.

[0072] S620, filter the third acoustic emission signal and the fourth acoustic emission signal according to the main frequency domain. Among them, the filtering process means filtering out the frequency signals outside the main frequency domain.

[0073] It can be understood that filtering the third acoustic emission signal and the fourth acoustic emission signal according to the main frequency domain filters out the frequency signals outside the main frequency domain in the third acoustic emission signal and the fourth acoustic emission signal, so as to filter out most of the drawing machine noise and ambient noise. [[ID=X]]

[0074] With such a setting, the quality of the third acoustic emission signal and the fourth acoustic emission signal is improved.

[0075] Optionally, the method further includes: After detecting any acoustic emission signal, change the sound intensity lower than the second threshold in the detected acoustic emission signal to 0 sound intensity.

[0076] It can be understood that any acoustic emission signal can be the first acoustic emission signal, the second acoustic emission signal, the third acoustic emission signal or the fourth acoustic emission signal. The detected acoustic emission signals also include various white noises. Since the sound intensity of these white noises is very small, a second threshold can be set to change the sound intensity lower than the second threshold in all the detected acoustic emission signals to 0 sound intensity.

[0077] With such a setting, the quality of all the obtained acoustic emission signals is improved.

[0078] Optionally, the detection position of the third acoustic emission signal and the detection position of the fourth acoustic emission signal are symmetric about the copper wire drawing point.

[0079] It can be understood that both the third acoustic emission signal and the fourth acoustic emission signal include the drawing noise of the drawing machine. Therefore, the two signals can be subtracted to filter out the drawing noise, but the premise is that the drawing noises in the two signals are the same. Therefore, the detection positions of the third acoustic emission signal and the fourth acoustic emission signal must be symmetric about the copper wire drawing point, that is, the distances from the drawing point to the two signal detection positions are equal, so that the drawing noises in the two signals are the same.

[0080] Such a setting is conducive to filtering out the drawing noise of the drawing machine.

[0081] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0082] Corresponding to the method for quality control of the copper wire drawing process based on acoustic emission signals described in the above embodiments, an embodiment of the present application further provides a device for quality control of the copper wire drawing process. Each unit of the device can implement each step of the method for quality control of the copper wire drawing process based on acoustic emission signals. Figure 2 The structural block diagram of the device for quality control of the copper wire drawing process provided by the embodiment of the present application is shown. For the convenience of description, only the parts related to the embodiment of the present application are shown.

[0083] Refer to Figure 2 , the device includes: A first control unit, configured to control the drawing machine to draw a part of the sample copper wire with a default drawing setting; wherein, the drawn sample copper wire includes an undrawn part and a drawn part; A detection unit, configured to detect a first acoustic emission signal of the undrawn part of the sample copper wire and detect a second acoustic emission signal of the drawn part of the sample copper wire; An adjustment unit, configured to adjust the drawing setting according to the second acoustic emission signal; A calculation unit, configured to determine an acoustic intensity transfer coefficient according to the ratio of the first acoustic emission signal to the second acoustic emission signal; wherein, the acoustic intensity transfer coefficient is used to reflect the attenuation ratio of the acoustic emission signal after the acoustic emission signal in the drawn part is transmitted to the undrawn part; A second control unit, configured to control the drawing machine to draw the copper wire with the adjusted drawing setting, and on-line detect a third acoustic emission signal and a fourth acoustic emission signal of the copper wire being drawn, and obtain a fine-tuning method for the drawing setting according to the third acoustic emission signal, the fourth acoustic emission signal and the acoustic intensity transfer coefficient; wherein, the detection position of the third acoustic emission signal is on the undrawn copper wire, and the detection position of the fourth acoustic emission signal is on the drawn copper wire.

[0084] It should be noted that, for the information interaction and execution process between the above-mentioned units, etc., since they are based on the same concept as the method embodiments of this application, for their specific functions and the technical effects brought about, reference can be specifically made to the method embodiment part, and details will not be elaborated here.

[0085] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above division of each functional unit is used as an example for illustration. In practical applications, the above functions can be allocated to different functional units according to needs, that is, the internal structure of the device is divided into different functional units to complete all or part of the functions described above. Each functional unit in the embodiment can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit are only for the convenience of mutual distinction and do not limit the protection scope of this application. The specific working process of the units in the above system can refer to the corresponding process in the foregoing method embodiments, and details will not be elaborated here.

[0086] The embodiment of this application also provides a quality control device for the copper wire drawing process. Figure 3 It is a schematic structural diagram of the quality control device for the copper wire drawing process provided by an embodiment of this application. As Figure 3 shown, the control device 3 of the quality control device for the copper wire drawing process in this embodiment includes: at least one processor 30 ( Figure 3 only one is shown here), at least one memory 31 ( Figure 3 only one is shown here), and a computer program 32 stored in the at least one memory 31 and executable on the at least one processor 30. When the processor 30 executes the computer program 32, the control device 3 of the quality control device for the copper wire drawing process implements the steps in any of the above-mentioned method embodiments of the quality control method for the copper wire drawing process based on acoustic emission signals, or enables the control device 3 of the quality control device for the copper wire drawing process to implement the functions of each unit in the above-mentioned device embodiments.

[0087] Exemplarily, the computer program 32 can be divided into one or more units. The one or more units are stored in the memory 31 and executed by the processor 30 to complete this application. The one or more units can be a series of computer program instruction segments capable of completing specific functions, and these instruction segments are used to describe the execution process of the computer program 32 in the control device 3 of the quality control device for the copper wire drawing process.

[0088] The control device 3 of the quality control device for the copper wire drawing process may be a single-chip microcomputer, a microprocessor, a mobile phone, a tablet computer, a wearable device, a vehicle-mounted device, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), a desktop computer, a smart large screen, a smart TV, a handheld device with wireless communication function. The control device 3 of the quality control device for the copper wire drawing process may include, but is not limited to, a processor 30 and a memory 31. Those skilled in the art can understand that Figure 3 merely examples of the control device 3 of the quality control device for the copper wire drawing process, which do not constitute a limitation on the control device 3 of the quality control device for the copper wire drawing process, may include more or fewer components than shown in the figure, or combine certain components, or different components. For example, it may also include input / output devices, network access devices, buses, etc.

[0089] The processor 30 may be a central processing unit (CPU), and the processor 30 may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0090] The memory 31 may be an internal storage unit of the control device 3 of the copper wire drawing process quality control device in some embodiments, such as the hard disk or memory of the control device 3 of the copper wire drawing process quality control device. The memory 31 may also be an external storage device of the control device 3 of the copper wire drawing process quality control device in some other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. equipped on the control device 3 of the copper wire drawing process quality control device. Further, the memory 31 may also include both an internal storage unit and an external storage device of the control device 3 of the copper wire drawing process quality control device. The memory 31 is used to store an operating system, application programs, a BootLoader, data, and other programs, such as the program code of the computer program. The memory 31 may also be used to temporarily store data that has been output or will be output.

[0091] An embodiment of the present application also provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the steps in any of the above method embodiments are implemented.

[0092] An embodiment of the present application provides a computer program product, and when the computer program product runs on a copper wire drawing process quality control device, the copper wire drawing process quality control device implements the steps in any of the above method embodiments.

[0093] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, to implement all or part of the processes in the above method embodiments of the present application, a computer program may be used to instruct relevant hardware to complete. The computer program may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps in the above method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, an executable file, or some intermediate form, etc. The computer-readable medium may at least include: any entity or device capable of carrying the computer program code to the copper wire drawing process quality control device, a recording medium, a computer memory, a Read-Only Memory (ROM), a Random Access Memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk, or an optical disc, etc.

[0094] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For parts not described or recorded in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0095] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0096] In the embodiments provided in this application, it should be understood that the disclosed quality control method for the copper wire drawing process based on acoustic emission signals, the quality control device for the copper wire drawing process, and the quality control equipment for the copper wire drawing process can be implemented in other ways. For example, the above-described embodiments of the quality control method for the copper wire drawing process based on acoustic emission signals, the quality control device for the copper wire drawing process, and the quality control equipment for the copper wire drawing process are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of devices or units can be in electrical, mechanical or other forms.

[0097] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place, or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0098] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. And these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included in the protection scope of this application.

Claims

1. A quality control method for the copper wire drawing process based on acoustic emission signals, characterized in that, Applied to the quality control equipment for the copper wire drawing process, the quality control equipment for the copper wire drawing process is communicatively connected to the drawing machine. The quality control equipment for the copper wire drawing process can control the drawing settings of the drawing machine and can also detect the acoustic emission signals of the copper wire. The method includes: Controlling the drawing machine to draw a part of the sample copper wire with the default drawing settings; wherein, the drawn sample copper wire includes an undrawn part and a drawn part; Detecting a first acoustic emission signal of the undrawn part of the sample copper wire and detecting a second acoustic emission signal of the drawn part of the sample copper wire; Adjusting the drawing settings according to the second acoustic emission signal; Determining an acoustic intensity transfer coefficient according to the ratio of the first acoustic emission signal to the second acoustic emission signal; wherein, the acoustic intensity transfer coefficient is used to reflect the attenuation ratio of the acoustic emission signal after the acoustic emission signal in the drawn part is transmitted to the undrawn part; Controlling the drawing machine to draw the copper wire with the adjusted drawing settings and online detecting a third acoustic emission signal and a fourth acoustic emission signal of the copper wire being drawn. According to the third acoustic emission signal, the fourth acoustic emission signal and the acoustic intensity transfer coefficient, obtaining a fine-tuning method for the drawing settings; wherein, the detection position of the third acoustic emission signal is on the undrawn copper wire, and the detection position of the fourth acoustic emission signal is on the drawn copper wire.

2. The quality control method for the copper wire drawing process based on acoustic emission signals according to claim 1, wherein, The adjusting the drawing settings according to the second acoustic emission signal includes: Obtaining a first signal activity parameter according to the second acoustic emission signal; wherein, the first signal activity parameter is used to reflect the activity degree of the second acoustic emission signal; Obtaining the user input or the default activity parameter threshold; According to the first signal activity parameter, the activity parameter threshold and the default drawing settings, obtaining the target drawing settings and adjusting the drawing settings according to the target drawing settings.

3. The quality control method for the copper wire drawing process based on acoustic emission signals according to claim 2, wherein, The obtaining the fine-tuning method for the drawing settings based on the third acoustic emission signal, the fourth acoustic emission signal and the acoustic intensity transfer coefficient includes: At every first time interval, according to the third acoustic emission signal, the fourth acoustic emission signal and the acoustic intensity transfer coefficient at that time, obtaining the acoustic emission signal of the stress concentration point in the copper wire at that time; Obtaining a second signal activity parameter according to the acoustic emission signal of the stress concentration point; wherein, the second signal activity parameter is used to reflect the activity degree of the acoustic emission signal of the stress concentration point; When the second signal activity parameters of consecutive n times are all greater than or all less than the activity parameter threshold, calculating the average value of the n second signal activity parameters, and according to the average value of the n second signal activity parameters, the activity parameter threshold and the current drawing settings, obtaining the target drawing settings, and taking the target drawing settings as the target to obtain the fine-tuning method for the drawing settings; wherein, the n is a preset positive integer.

4. The quality control method for the copper wire drawing process based on acoustic emission signals as claimed in claim 3, wherein, The method further includes: When the acoustic emission signals of the stress concentration points obtained continuously for n times all meet the first condition, the wire drawing machine is temporarily stopped for pulling every first time period, and the third acoustic emission signal and the fourth acoustic emission signal are detected during the downtime of the wire drawing machine; wherein, the first condition refers to that the ratio of the average acoustic intensity of the acoustic emission signal of the stress concentration point to the average acoustic intensity of the fourth acoustic emission signal at that time is less than the first threshold.

5. The quality control method for the copper wire drawing process based on acoustic emission signals according to claim 1, wherein A sensor is arranged in the driving pulley of the wire drawing machine. When the wire drawing machine is drawing copper wire, the third acoustic emission signal and the fourth acoustic emission signal of the copper wire are detected through the sensor in the driving pulley, and there is no relative sliding between the driving pulley and the copper wire.

6. The quality control method for the copper wire drawing process based on acoustic emission signals according to claim 1, characterized in that, The method further includes: Subtracting the first acoustic emission signal from the second acoustic emission signal to obtain a main signal, and the frequency domain where the main signal is located is the main frequency domain; Filter the third acoustic emission signal and the fourth acoustic emission signal according to the main frequency domain; wherein, the filtering process means filtering out the frequency signals outside the main frequency domain.

7. The quality control method for the copper wire drawing process based on acoustic emission signals according to claim 1, characterized in that, The method further includes: After detecting any acoustic emission signal, change the acoustic intensity lower than the second threshold in the detected acoustic emission signal to 0 acoustic intensity.

8. The quality control method for the copper wire drawing process based on acoustic emission signals according to claim 1, wherein, The detection positions of the third acoustic emission signal and the fourth acoustic emission signal are symmetric about the copper wire drawing point.

9. The quality control method for the copper wire drawing process based on acoustic emission signals according to claim 2, characterized in that, The method further includes: When it is detected that the user adjusts the active parameter threshold after the wire drawing machine has been started, determine the adjustment amount of the active parameter threshold. If the adjustment amount of the active parameter threshold is greater than the third threshold, start the quality control method for copper wire drawing process based on acoustic emission signals from the beginning.

10. A quality control device for the copper wire drawing process, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, the method described in any one of claims 1 to 9 is implemented.

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