A high-precision punch remote monitoring method and system

Abstract

This invention discloses a remote monitoring method and system for high-precision punch presses, relating to the field of remote monitoring technology for industrial equipment. The method includes the following steps: S1, acquiring electromagnetic response data from the motor to the monitoring link along the stroke time axis, capturing transient energy surges, plotting the trajectory of interference flash peaks in the time domain, and forming an electromagnetic flash peak shadow line covering the entire stroke cycle. This invention, by combining a breathable shielding structure and a venting structure, achieves dynamic absorption and release of electromagnetic interference, effectively isolating and guiding interference signals, avoiding excessive accumulation and misjudgment. This innovative mechanism ensures stable operation of the punch press under high load and high speed, significantly reducing the probability of false triggering of protection devices, improving equipment operating efficiency and production stability, and reducing downtime and the need for manual intervention.

Description

Technical Field

[0001] This invention relates to the field of remote monitoring technology for industrial equipment, and specifically to a method and system for remote monitoring of a high-precision punch press. Background Technology

[0002] Remote monitoring of high-precision punch presses refers to a comprehensive monitoring method that utilizes technologies such as the Internet of Things (IoT), sensor monitoring, supervision and control systems, data acquisition systems, edge computing, and cloud data analysis to collect, remotely transmit, and intelligently manage key status parameters (such as stamping speed, pressure curve, die clearance, vibration spectrum, oil temperature, energy consumption, and fault signals) of high-precision punch presses during operation. By establishing a linkage system between data acquisition terminals, supervision and control systems, and cloud monitoring platforms, managers can dynamically and visually monitor the punch press's operating status remotely, promptly identify abnormal trends, and execute remote control, parameter adjustments, or maintenance scheduling. This achieves transparency in equipment status, intelligent maintenance decisions, and high stability and consistency in the production process. This monitoring model not only improves the efficiency and safety of high-precision punch presses but also significantly reduces manual inspection costs and downtime losses, driving the transformation of traditional stamping manufacturing equipment towards intelligence and networking.

[0003] The existing technology has the following shortcomings: In the existing technology, high-precision punch presses generally use a combination of current sensors and monitoring modules to monitor the motor's operating status in real time, so as to trigger the protection mechanism in time when the load is abnormal or the current is overloaded. However, in complex electromagnetic environments, when transient electromagnetic coupling interference occurs between the punch press motor and the monitoring module, the monitoring circuit is very likely to sense false high-amplitude current pulse signals, causing the system to misjudge the overload state and immediately trigger the protection power-off. Since this power-off action occurs during the stroke, the punch often has not yet completed its return reset, causing the moving parts to remain in an unsafe position, and the workpiece is clamped in the die closure area, forming a die jam. Furthermore, due to the plastic deformation of the workpiece material and the uneven force on the die, the die gap is forcibly locked, resulting in die lock-up or even serious structural damage such as guide post bending and die surface cracking.

[0004] The information disclosed in the background section is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a method and system for remote monitoring of high-precision punch presses to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for remote monitoring of a high-precision punch press, comprising the following steps: S1, along the stroke time axis, acquire electromagnetic response data from the motor to the monitoring link, capture the transient energy surge process, plot the change trajectory of the interference flash peak in the time domain, and form an electromagnetic flash peak shadow line covering the entire stroke cycle; S2, based on the spatial distribution characteristics of electromagnetic flash peak shadows, an induction response structure is deployed in the area where the cable path and the base meet. The location of electromagnetic energy intrusion is identified by the change in the intensity of the induction signal, and a set of coupling intrusion anchor points is established. S3, a passive ring absorption structure is embedded in the path region corresponding to the set of coupling intrusion anchor points, so that the interference energy is partially absorbed in the conduction link, and an energy folding region is formed by the difference in signals before and after absorption, thus constructing a folding window with defined boundaries; S4. Within the space covered by the folded window, a micro-isolation slit is set on the motor housing structure. A conductive material layer and a magnetic permeable material layer are superimposed in the isolation slit to form a breathable shielding structure with dual functions of energy conduction and energy resistance. S5, through the phase response behavior of the breathable shielding structure, enables the structure to open and close synchronously with the stroke cycle, and guides the discharge structure connected to the ground wire to release residual interference energy in a time rhythm, thereby breaking the trigger chain of the interference signal and maintaining the electromagnetic stability of the punch press operation.

[0007] Preferably, step S1 includes: An electromagnetic response acquisition channel is set up, starting from the output end of the main drive motor and ending at the input node of the status monitoring link connecting the motor. Multiple distributed sensing points are set up along the path to collect instantaneous change data of current, voltage and magnetic flux density, and to construct an electromagnetic response timing matrix. By combining the stroke position feedback signal of the punch press stroke controller, the electromagnetic response timing matrix is ​​converted into a three-dimensional stroke mapping array, and each sampling point is spatially and temporally jointly located to identify abnormal flash signals that deviate significantly from the reference state. Trajectory fitting and trend analysis are performed on abnormal signals to extract parameters such as peak amplitude, rising slope and falling attenuation rate. The direction of interference energy transmission is analyzed and a set of interference trajectories is formed. By merging effective interference trajectories according to time sequence, an electromagnetic flash peak shadow line covering the complete stroke cycle is constructed, forming a representation of the temporal, spatial, and frequency characteristics of the interference energy.

[0008] Preferably, the time axis calibration and synchronization processing of the interference signal are achieved through multi-point synchronous sampling, ensuring that the instantaneous changes of the electromagnetic signal are captured in real time at each stage of the stroke, accurately identifying abnormal signals and locating their positions; through spatial-temporal joint positioning, the constructed three-dimensional stroke mapping array can provide a complete electromagnetic response path map.

[0009] Preferably, step S2 includes: Based on the electromagnetic flash peak shadow line, the distribution map of the interference intensity change during different time periods in the stroke is mapped to the physical structure of the punch press to infer the location of the interference source in physical space; Multiple induction response structure units are arranged along the cable path from the motor connection end to the base area. Each unit includes an electric field response layer, a magnetic field response layer and an induction lead connection end, and collects signal data to be synchronously compared with electromagnetic flash peak shadow data. Auxiliary sensing devices were deployed around the main intrusion point to improve the resolution of the spatial energy distribution map and to draw an electromagnetic energy spatial gradient map based on the response potential of the sensing strips. By combining electromagnetic flash peak shadow data and jointly analyzing the temporal sequence and energy response strength of anchor points, occasional responses are eliminated, and recurring anchor point locations are retained. Finally, a complete set of coupled intrusion anchor points is established, which serves as the design basis for subsequent interference suppression.

[0010] Preferably, step S3 includes: Based on the location of the set of coupling intrusion anchor points, spatial accuracy correction and path projection are performed within the path area, and an anchor point projection path map is established to determine the deployment range of the absorption structure. A passive ring-shaped absorption strip is laid along the cable surface in the defined path area. The absorption strip is made of a composite material of graphite conductive fiber and magnetic oxide powder and is closed in a ring manner to absorb high-frequency harmonics and transient pulse energy non-reflectively. A difference analysis was performed on the signal response before and after the absorption band. An energy reflection region was constructed based on the energy reduction and propagation delay results. The energy dissipation direction was detected by auxiliary detection points to determine the energy shift characteristics. Based on the energy folding phenomenon, an interference propagation boundary is defined between the cable path and the base, forming a three-dimensional folding window, which provides a spatial basis for the subsequent deployment of shielding and leakage devices.

[0011] Preferably, energy response detection structures are set before and after the absorption band. The energy reduction effect is calibrated by detecting the changes in signal amplitude and time delay characteristics, and the detection results are fed back to the absorption band deployment area to dynamically adjust the distribution density of the absorption material, thereby enhancing the spatial attenuation capability of interference energy in the conduction link and stabilizing the boundary position of the folding window.

[0012] Preferably, step S4 includes: Based on the spatial boundary of the folded window, the position of the micro-isolation seam is determined on the motor housing structure. The micro-isolation seam is set on the contact surface between the motor housing and the punch press base to isolate the propagation path of external interference signals. A conductive material layer is superimposed on the inside of the micro-isolation slit. The conductive material layer is made of high-purity copper foil and is tightly attached to the motor housing to form a continuous conductive path to reduce the intensity of external electromagnetic signals. A magnetic permeable material layer is superimposed on the outside of the conductive material layer. The magnetic permeable material layer is composed of ferrite with high magnetic permeability and is in contact with the conductive layer to form a double shielding structure for electromagnetic fields. This structure is used to absorb high-frequency magnetic fields and convert energy into heat energy for dissipation. A breathable shielding layer is formed on the basis of conductive material layer and magnetic permeable material layer, so that the shielding layer can open and close according to the changes in the motor's working state, adjust the internal and external electromagnetic environment and release the accumulated interference energy to maintain the stable operation of the punch press.

[0013] Preferably, the breathable shielding layer within the micro-isolation gap includes an adjustable layer made of an electrodeformable material. The adjustable layer deforms through electromagnetic induction to drive the shielding layer to open and close slightly, so that the shielding layer automatically releases the accumulated electromagnetic energy when the motor is running under high load and remains sealed under low load conditions, thereby achieving adaptive adjustment to the electromagnetic environment and preventing the accumulation of interference energy.

[0014] Preferably, step S5 includes: Phase response adjustment is carried out on the basis of the breathable shielding structure. An intelligent response unit is set inside the shielding layer. The shielding layer is driven to open and close synchronously in accordance with the change of electromagnetic field by electrodeformable material, so as to release excess electromagnetic energy. A current-dissipating structure connected to the ground wire is set up. The current-dissipating structure is composed of high-conductivity copper wire and conductive film. It is arranged between the shielding layer and the ground to form a low-impedance discharge channel and releases residual interference energy in a time rhythm during the opening and closing of the shielding layer. A dynamic electromagnetic interference suppression mechanism is established. By adjusting the opening and closing frequency of the shielding layer and the flow rate of the discharge structure, the interference energy is periodically released according to the operating status of the punch press, preventing the interference signal from accumulating in the system. The electromagnetic stability of the punch press is maintained through the long-term synergistic effect of the shielding layer and the leakage structure, thereby improving operational stability and anti-interference performance.

[0015] A high-precision punch press remote monitoring system includes an electromagnetic image modeling module, an interference path identification module, an energy interception and reversal module, a shielding structure construction module, and a dynamic leakage control module. The electromagnetic image modeling module acquires electromagnetic response data from the motor to the monitoring link along the stroke time axis, captures the transient energy surge process, plots the change trajectory of the interference flash peak in the time domain, and forms an electromagnetic flash peak shadow line covering the entire stroke cycle. The interference path identification module, based on the spatial distribution characteristics of electromagnetic flash shadows, deploys an induction response structure in the area where the cable path meets the base, identifies the electromagnetic energy intrusion location by the change in the intensity of the induction signal, and establishes a set of coupling intrusion anchor points. The energy interception and back-off module embeds a passive ring absorption structure in the path region corresponding to the set of coupling intrusion anchor points, so that the interference energy is partially absorbed in the conduction link, and forms an energy back-off region by the difference in signal before and after absorption, thus constructing a back-off window with defined boundaries. The shielding structure construction module sets micro-isolation seams on the motor housing structure within the space area covered by the folded window. A conductive material layer and a magnetic permeable material layer are superimposed inside the isolation seams to form a breathable shielding structure with dual functions of energy conduction and energy resistance. The dynamic discharge control module, through the phase response behavior of the breathable shielding structure, enables the structure to open and close synchronously with the stroke cycle, and guides the discharge structure connected to the ground wire to release residual interference energy in a time rhythm, thereby breaking the trigger chain of interference signals and maintaining the electromagnetic stability of the punch press operation.

[0016] The technical effects and advantages provided by the present invention in the above technical solution are as follows: This invention combines a breathable shielding structure with a discharge structure to achieve dynamic absorption and release of electromagnetic interference, enabling interference signals to be isolated and effectively guided in a timely manner, thereby avoiding excessive accumulation and misjudgment of interference energy. Through this innovative mechanism, the punch press equipment can maintain stability under high load and high speed operation, greatly reducing the probability of false triggering of protection devices, improving equipment operating efficiency and production stability, while reducing equipment downtime and the need for manual intervention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a flowchart of a method for remote monitoring of a high-precision punch press according to the present invention.

[0019] Figure 2 This is a schematic diagram of a module of a high-precision punch press remote monitoring system according to the present invention. Detailed Implementation

[0020] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art.

[0021] This invention provides, for example Figure 1 The method for remote monitoring of a high-precision punch press, as shown, includes the following steps: S1, along the stroke time axis, acquire electromagnetic response data from the motor to the monitoring link, capture the transient energy surge process, plot the change trajectory of the interference flash peak in the time domain, and form an electromagnetic flash peak shadow line covering the entire stroke cycle; To address the transient interference problem caused by electromagnetic coupling during the stroke execution of a motor, a technical solution is proposed to acquire electromagnetic response data from the motor to the monitoring link along the stroke time axis and plot the trajectory of the interference flash peak in the time domain, thereby forming an electromagnetic flash peak shadow line covering the entire stroke cycle. The implementation process includes the following steps: After the high-precision punch press starts, an independent electromagnetic response acquisition channel is set up. The channel starts at the output end of the main drive motor and terminates at the input node of the status monitoring link connected to the motor. At least eight distributed sensing points are set along this channel, with the spacing between each sensing point being 1 / 8 to 1 / 10 of the length of the punch press's main cable path, ensuring coverage of the entire signal propagation path. The sensing points use broadband current probes and magnetic field sensing devices with a high-frequency response capability of at least 10MHz to ensure sufficient sensitivity to short-term, high-amplitude interference signals. During a complete stroke of the punch press (including the pressing, holding, and return strokes), the instantaneous changes in current, voltage, and magnetic flux density at each sensing point are acquired at a time resolution of at least 10,000 times per second, every millisecond. These raw data are then time-axis calibrated and synchronized to construct an initial time-series matrix of the electromagnetic response. Each column in this matrix corresponds to the signal strength at multiple points at a sampling time, and each row represents the electromagnetic evolution trajectory of a specific sensing point throughout the entire stroke.

[0022] After obtaining the timing matrix, the stroke position feedback signal provided by the punch press stroke controller is used to perform spatial-temporal joint positioning of each sampling point in the data matrix, thereby converting the electromagnetic response data from a two-dimensional timing matrix into a three-dimensional stroke mapping array. In this array, each electromagnetic anomaly point not only has a clear timestamp but also corresponds to a specific position in the stroke (e.g., 15 mm before the punch descends to the lower dead center). By comparing the baseline interference-free state data of each stage of the stroke, abnormal flash signals with significant deviations from the baseline state can be identified. For example, during the stroke descent stage T1 to T3, the fourth sensing point located in the middle of the main cable recorded a sudden current peak value 380% higher than the baseline value, lasting for 2 milliseconds. This peak value corresponds to a stroke position of 40% to 42% of the descent stroke. Based on this data difference, all spatiotemporal points of sudden energy anomalies are hierarchically labeled and clustered according to indicators such as amplitude, duration, and location distribution to initially screen out the time periods and spatial locations that may constitute interference sources.

[0023] Based on the clustering and labeling of interference flash peaks, trajectory fitting and trend analysis are performed on each type of abnormal signal. Using time series fitting, parameters such as peak amplitude, rising slope, and falling attenuation rate are extracted for each group of continuous high-amplitude flash peak signals, establishing corresponding interference variation curves. Furthermore, by comparing the signal response curves at multiple adjacent moments within the same stroke cycle at each sensing point, the direction of interference energy transmission can be determined. For example, if, within a certain stroke cycle, sensing points 1, 2, and 3, starting from the motor output, successively experience sudden energy increases at time intervals of 1 millisecond and 0.8 milliseconds, with a linear increasing amplitude, it can be inferred that this type of interference is gradually propagated from the motor towards the monitoring link. If the flash peak at sensing point 3 is higher than that at sensing point 1, and the response occurs before that at sensing point 1, it indicates the presence of reverse coupling or induced interference from an external field source. Through this process, the initiation point, energy path, and duration of the interference are gradually clarified, forming an analytical set of electromagnetic interference trajectories.

[0024] After extracting the interference trajectory set, all valid interference trajectories are merged in chronological order to construct an electromagnetic flash peak shadow line covering the entire stroke cycle. This shadow line is the main channel of interference energy extracted from the three-dimensional stroke mapping array, and can be regarded as an electromagnetic activity path map running through the entire process of punch movement. The shadow line uses the stroke percentile as the horizontal axis and the signal amplitude as the vertical axis, and superimposes the interference frequency distribution information on the Z-axis to form an interference feature representation with time, space, and frequency dimensions. In this way, it is possible to accurately identify which time periods, locations, and signal characteristics are most likely to cause false current peaks, and it can also serve as the basic data for subsequent identification of interference intrusion anchor points, design of absorption paths, and construction of discharge structures. Compared with the prior art, this implementation method does not only detect current anomalies at a fixed point, but also constructs a complete interference spectrum throughout the entire stroke through multi-point dynamic synchronous sampling, which has higher interference source tracing capability and path identification accuracy, avoids protection malfunctions caused by single-point misjudgment, and fundamentally improves the controllability of the punch press electromagnetic environment.

[0025] S2, based on the spatial distribution characteristics of electromagnetic flash peak shadows, an induction response structure is deployed in the area where the cable path and the base meet. The location of electromagnetic energy intrusion is identified by the change in the intensity of the induction signal, and a set of coupling intrusion anchor points is established. After obtaining the electromagnetic flash peak shadow line covering the entire stroke cycle, it is necessary to locate and quantify the actual intrusion path of electromagnetic interference in space to determine the specific location where the interference source enters the monitoring link and establish a set of coupling intrusion anchor points, providing a physical basis for subsequent interference suppression. The specific steps for this are as follows: Based on previously acquired electromagnetic flash peak shadows, the distribution of interference intensity variations across different time periods during the stroke is mapped to the physical structure of the punch press. Since the electromagnetic flash peak shadows exhibit a rapid energy surge within a specific timeframe, the location of the flash peak's source in physical space can be indirectly inferred from its temporal position. Combining this with the high-amplitude signal regions recorded in the electromagnetic flash peak shadows—for example, when the punch is pressed down to approximately 45% of its midpoint, the flash peak suddenly increases and appears between sensing points 3 and 4, with an amplitude increase of up to 320% and a duration of 2.3 milliseconds—it can be deduced that the interference source is located above the middle section of the main cable connection. To further verify the accuracy of this spatial distribution prediction, an induction response structure for responding to interference energy needs to be deployed in this area, allowing actual induction data to assist in spatially locating the interference path.

[0026] Within the presumed area, multiple interference response structural units are arranged at equal intervals along the cable path from the drive motor connection end to the base. Each structural unit includes three layers of sensing material: an electric field response layer, a magnetic field response layer, and an induction lead connection end. The electric field response layer uses a piezoelectric composite material resistant to high-frequency interference to receive spatially distributed electrostatic changes; the magnetic field response layer uses a high-permeability alloy strip with a thickness of not less than 0.2 mm and a permeability of not less than 300, wrapped around the cable to form a closed induction loop; the induction lead connection end is used to introduce the induction signal into external test terminals. The response signal of each sensing structural unit is collected and marked with its timestamp and location number, and synchronously compared with the time domain data in the aforementioned electromagnetic flash peak shadow line to determine whether it coincides with the period of sudden interference. Taking one stamping cycle as an example, assuming that in the induction response structural units A, B, and C, the induced voltage at position B is 4.3 volts when the punch is pressed down to 50% of its stroke, which is significantly higher than the stable values ​​of 0.6 volts and 0.7 volts at positions A and C, respectively, and this moment completely coincides with a high-amplitude jump in the electromagnetic flash peak shadow line, it can be inferred that this position is the main intrusion point of the interference energy.

[0027] After confirming the location of the interference energy intrusion, auxiliary sensing devices are deployed around the two sensing structural units before and after the main intrusion point to establish a higher resolution spatial energy distribution map. The auxiliary sensing devices include crisscrossing sensing strips laid perpendicular to the main cable direction, forming a three-dimensional sensing matrix with the main cable. Each strip is 100 mm long and 5 mm wide, extending laterally along the area where the base housing intersects with the cable. The electromagnetic energy sensed by the strips accumulates charge, forming a micro-potential difference in each stroke, which is then conducted to the acquisition node. Plotting the response potential of each strip within each millisecond using spatial coordinates creates a spatial gradient map of electromagnetic energy covering the entire cable-base interface area. For example, in the area 180 mm to 240 mm from the cable end, five of the sensing strips in the group exhibit a concentrated area with an average voltage response higher than 1.2 volts, while the surrounding strips generally have voltage responses lower than 0.4 volts. This area can be inferred to be a concentrated channel for coupling interference. By extracting the spatial and temporal coordinates of these locations with high response values ​​as the center, a set of anchor points for interference energy intrusion can be established. The anchor point coordinates consist of three parts: the axial position of the cable, the relative distance between the cable and the shell, and the time point when the interference occurred.

[0028] Based on the anchor point set, and combined with previously obtained electromagnetic flash peak shadow data, the order of each anchor point on the time axis and the strength of the energy response are jointly analyzed to determine the propagation path of the interference and the main intrusion point. To improve the practicality of the anchor point set, this implementation method performs frequency superposition of anchor point positions that recur in multiple stroke cycles, eliminating sporadic points caused by single abnormal responses, and retaining only anchor point positions that recur in more than 80% of the strokes as effective coupling intrusion points. For example, in 100 consecutive strokes, 92 sudden interference responses were recorded 120 mm below the bolt on the left side of the base housing. This position corresponds to the starting segment of high-amplitude interference in the flash peak shadow and is statistically identified as the main coupling intrusion point. Finally, by summarizing these anchor points with spatial concentration, significant energy, and recurrence characteristics, a complete coupling intrusion anchor point set is established. This set not only provides the physical location basis for the interference source to enter the monitoring link, but also provides a quantitative deployment basis for the subsequent setting of absorption structures and energy dissipation structures.

[0029] S3, a passive ring absorption structure is embedded in the path region corresponding to the set of coupling intrusion anchor points, so that the interference energy is partially absorbed in the conduction link, and an energy folding region is formed by the difference in signals before and after absorption, thus constructing a folding window with defined boundaries; After constructing the electromagnetic flash peak shadow line and identifying the set of coupled intrusion anchor points, in order to effectively suppress the propagation of coupled interference along the path towards the monitoring link and prevent the energy from superimposing inside the link to form false peaks, this method further proposes a technical measure of embedding a passive ring absorption structure in the path region corresponding to the anchor point set. This measure constructs an energy reversal boundary through engineering, partially truncating the interference energy and guiding it away from the main link, thereby spatially defining the interference influence range and constructing a reversal window with a defined boundary. The process specifically includes the following steps: Based on the established set of coupling intrusion anchor points, the anchor point positions are precisely corrected and projected in space. Since the anchor point set is typically linearly distributed along the main cable path, and some anchor points are located at the interface between the cable sheath and the metal frame of the base, an anchor point projection path map needs to be established before deploying the absorption structure. This path map uses the cable axis as a reference line, projecting outwards to a coverage area no more than 20 mm from the cable surface, and extending 30 mm forward and backward from the center of each anchor point to form an anchor point buffer zone. Taking a cable path length of 800 mm as an example, if 12 effective anchor points are identified, the deployment length of the absorption structure will cover the center of the anchor point and 60 mm before and after it, forming a strip area of ​​approximately 720 mm for energy absorption device configuration. To ensure that the absorption structure forms a closed loop within this area, at least four equidistant absorption channels must be set along the circumferential direction of the projection path, forming an enclosing circumferential structure and providing the basic geometry for energy return.

[0030] Within the area where the absorption structure is deployed, passive ring-shaped absorption strips are laid along the cable surface. Each absorption strip is made of a flexible material composed of graphite conductive fibers and magnetic oxide powder, possessing high electromagnetic loss characteristics and nonlinear exchange characteristics. The width of the absorption strip is controlled between 8 and 12 mm, and the thickness is controlled within 1.5 mm. During ring-laying, the strips overlap every 60° to form a closed loop. This structure can absorb high-frequency harmonics and transient pulse energy in the path without affecting the normal power transmission performance of the cable. When interference signals are transmitted from near the anchor point to the absorption strip location, high-amplitude, high-frequency components preferentially couple into the absorption material and undergo multiple energy dissipations within its porous interlayer structure. Taking one test as an example, the peak induced voltage of the input cable at the anchor point is 5.2 volts, and the peak voltage drops to 3.7 volts after passing through the first absorption strip, with an energy reduction rate of approximately 28.8%. This result demonstrates that the absorption strip has a significant non-reflective interception effect on peak energy and possesses engineering practicality.

[0031] After the absorption structure is installed, a differential analysis of the signal response before and after the absorption strip is required to identify whether the absorption strip constitutes an effective boundary condition for reducing interference energy. Based on this, a so-called energy reversal region is constructed. The physical meaning of this region is that when high-amplitude energy is significantly suppressed in the absorption strip region and dissipates along a non-major axis, its subsequent propagation path no longer continues along the original cable direction. Instead, it is redirected or attenuated due to a sudden drop in energy density and spatial structural disturbances, forming a propagation deviation zone similar to the reversal phenomenon in optics. During implementation, an axially extending inductive response structure is installed behind the absorption strip to detect the difference in signal strength before and after absorption. For example, a peak value of 4.8 volts is measured at the front of the absorption strip, and 1.6 volts at the rear, with a waveform delay time increase of 0.6 milliseconds, indicating that signal propagation has been affected by structural interference. Furthermore, auxiliary detection points are deployed at the edge of the absorption strip towards the surrounding space, revealing that some energy dissipates along a 45° direction to the surface of the base casing, indicating that the absorption structure has induced energy reversal. This process not only suppresses the straight-line propagation path of the signal, but also guides the energy direction to achieve spatial redistribution of interference energy, providing technical conditions for building an effective isolation zone.

[0032] Based on the energy foldback phenomenon, a three-dimensional foldback window is formed by defining the boundary range of interference propagation between the cable path and the base. This window can be considered as a spatial region, the boundary of which is composed of the absorption band location, the point of maximum induction difference, and the energy dissipation and diffusion interface. To facilitate subsequent structural shielding deployment, this foldback window is physically represented as an irregular ellipsoid, with its major axis parallel to the cable direction and its minor axis perpendicular to the base interface surface. In subsequent design, all shielding and current-dissipating devices will be arranged around this foldback window to ensure that interference energy does not cross this spatial range and enter the core unit of the monitoring link.

[0033] S4. Within the space covered by the folded window, a micro-isolation slit is set on the motor housing structure. A conductive material layer and a magnetic permeable material layer are superimposed in the isolation slit to form a breathable shielding structure with dual functions of energy conduction and energy resistance. After completing the absorption and retraction zone for electromagnetic interference, the next step is to create micro-isolation slits on the motor housing structure based on the space covered by the retraction window. Within these slits, conductive and magnetic material layers are then superimposed to form a breathable shielding structure with both energy conduction and blocking functions. This shielding structure not only effectively isolates external interference energy but also regulates the exchange between the internal and external electromagnetic environments. Through its breathing function, it achieves timely energy release and shielding, ensuring the stable operation of the punch press in complex electromagnetic environments. The specific implementation steps are as follows: Based on the spatial boundaries of the constructed folded window, the specific location for setting micro-isolation slots on the motor housing is determined. This location is typically situated on the contact surface between the motor housing and the press base, approximately 1 to 5 millimeters from the motor housing surface. The length of the isolation slot is determined according to the coverage area of ​​the folded window, typically covering its maximum radius. To ensure the uniformity and integrity of the shielding effect, the width of the isolation slot is generally controlled between 0.5 and 1.0 millimeters. This micro-isolation slot effectively prevents interference signals from spreading along the motor housing surface, thereby reducing mutual interference between external electromagnetic fields and the motor's internal control system. For example, in one implementation, the folded window covered a 300-millimeter radius around the motor housing, and a micro-isolation slot with a width of 0.8 millimeters and a length of 600 millimeters was created on the housing within this range, ensuring effective signal isolation.

[0034] A conductive material layer is superimposed on the inner side of the micro-isolation slit. The selection of this conductive material layer is crucial, requiring high conductivity and good stability. Therefore, this embodiment uses high-purity copper foil with a thickness of 0.1 mm. Copper has a conductivity of 58 × 10^6 S / m, effectively shielding external electromagnetic interference over a wide frequency range. In the specific implementation, the conductive copper foil layer is precisely cut into strips matching the length of the isolation slit and evenly adhered to the inner side of the isolation slit, ensuring that the signal propagation path along the motor housing is strictly limited. A special adhesive is used to fix the surface of this layer, ensuring a tight electrical connection between the copper foil layer and the motor housing, effectively shielding against external interference. After this step, tests show that, after shielding with the copper foil material, the intensity attenuation rate of external electromagnetic signals is over 50%, effectively preventing interference signals from transmitting through the motor housing surface into the motor.

[0035] A magnetic permeable material layer is then stacked on the outside of the conductive material layer, creating a dual shielding effect of energy conduction and resistance. This magnetic permeable material layer is a high-permeability ferrite material with a permeability of 2000 and a thickness of 0.3 mm. Its function is to effectively block magnetic field interference, further enhancing the shielding effect by strengthening the absorption and guidance of the magnetic field. By directly contacting and covering the conductive layer, the magnetic permeable material layer forms a complete shielding barrier, effectively suppressing electromagnetic interference not only in the electric field but also in the magnetic field. The selection and arrangement of the magnetic permeable material ensures its effective absorption of high-frequency magnetic fields, converting them into heat energy for dissipation, thus preventing the high-frequency magnetic field from affecting the internal electronic components of the motor. During implementation, the flow of the magnetic permeable material is guided to be opposite to the direction of the electric field on the motor casing surface, thereby forming an effective electromagnetic isolation area.

[0036] Building upon the conductive and magnetic material layers, a shielding layer with a breathing function is further constructed. This breathing function refers to the shielding layer's ability to open and close appropriately according to changes in the motor's operating state, thereby achieving adaptive adjustment of the internal and external electromagnetic environment. Specifically, the shielding layer's breathing function is achieved through the interaction of fine-tuning current density and the electromagnetic field. When the motor is operating normally, the shielding layer remains completely sealed, effectively preventing the intrusion of external electromagnetic waves. However, when abnormal electromagnetic wave accumulation occurs in the motor, certain areas of the shielding layer automatically open, allowing some high-energy electromagnetic waves to be released through the isolation gaps. This process is achieved through a micro-airbag-like mechanical structure that dynamically senses and adjusts the electromagnetic field. In testing, the shielding layer, by releasing energy in a timely manner, prevented abnormal electromagnetic interference reactions caused by excessive electromagnetic energy accumulation inside the motor, ensuring the stability of the punch press. For example, when the punch press is operating under high load, the shielding layer, through its breathing adjustment, allows internal interference energy to be appropriately released, thereby preventing the false triggering of protection devices and ensuring the normal operation of the punch press during production.

[0037] S5, through the phase response behavior of the breathable shielding structure, enables the structure to open and close synchronously with the stroke cycle, and guides the discharge structure connected to the ground wire to release residual interference energy in a time rhythm, thereby breaking the trigger chain of the interference signal and maintaining the electromagnetic stability of the punch press operation process. After completing the construction of electromagnetic interference absorption, reflection, and shielding functions, to further ensure the electromagnetic stability of the punch press during operation, this method proposes to utilize the phase response behavior of a breathable shielding structure. This structure synchronously and slightly opens and closes with the stroke cycle, guiding the discharge structure connected to ground to release residual interference energy rhythmically over time, thereby breaking the trigger chain of the interference signal. This method effectively avoids excessive accumulation of electromagnetic interference and maintains electromagnetic stability during punch press operation by adaptively adjusting the state of the shielding layer. The specific implementation steps are as follows: Based on the established breathable shielding structure, precise adjustment of the structural phase response is performed. To ensure that the shielding structure can open and close slightly according to the workload during the press's working cycle, specialized intelligent response units need to be installed inside the shielding layer material. These units, based on changes in the electromagnetic field, can dynamically adjust the opening and closing degree of the shielding layer through internal electrodeformation effects. In specific implementation, a thin-film electrodeformable material is used. This material can change its shape under the drive of an external electric field, thereby causing the shielding layer to open and close slightly. For example, when the press is running under high load, the response intensity of the electrodeformable material increases, and the amplitude of the shielding layer's slight opening and closing increases accordingly, ensuring that excessive electromagnetic interference can be effectively released without affecting other operating functions of the press. In the test, under high load of the press, the opening and closing amplitude of the shielding layer was 0.2 mm to 0.5 mm, successfully releasing excess electromagnetic energy and avoiding the accumulation of interference signals in the system.

[0038] After adjusting the phase response of the shielding structure, and further considering the need to release electromagnetic interference, the electromagnetic environment of the shielding layer is adjusted by setting up a bleeder structure connected to the ground wire. The design of the bleeder structure is crucial; its purpose is to ensure that the shielding layer can effectively conduct excess electromagnetic energy to the ground wire during operation, thereby reducing the accumulation of interference energy in the equipment. In specific implementation, the bleeder structure employs a composite bleeder path composed of high-conductivity copper wire and a conductive film. This path is arranged between the shielding layer and the ground, forming a low-impedance current discharge channel. The bleeder structure can synchronously release energy in a time-rhythmic manner when the shielding layer opens and closes, allowing residual electromagnetic energy to flow to the ground through the conductive channel. Taking a standard stroke cycle as an example, when the press enters the pressing stage, the opening and closing amplitude of the shielding layer reaches its maximum value. At this time, the current released by the bleeder structure reaches its maximum value, approximately 10 amperes, and is maintained for 5 milliseconds. This process successfully suppresses transient interference signals from the motor and effectively reduces the possibility of system misjudgment.

[0039] A dynamic electromagnetic interference suppression mechanism was established by adjusting the phase response of the shielding layer and optimizing the current dissipation structure. This mechanism can adjust the opening and closing frequency of the shielding layer and the current conduction of the current dissipation structure in real time according to changes in the operating state of the punch press. During normal operation, the shielding layer remains relatively sealed, blocking the intrusion of external electromagnetic interference. When the intensity of the detected electromagnetic interference signal reaches a set threshold, the shielding layer automatically opens slightly, releasing excess energy to the ground wire through the current dissipation structure, thus preventing excessive accumulation and amplification of interference signals in the punch press system. For example, in one test, when the motor was running at full speed, the shielding layer began to open and close at a frequency of approximately 0.2 Hz, with each opening and closing lasting for 2 milliseconds, releasing approximately 5 watts of electromagnetic energy. During this process, the current dissipation structure rhythmically discharged 2 amperes of current, ensuring that electromagnetic interference would not affect the punch press control system, ultimately guaranteeing the stability of the punch press.

[0040] To ensure the stability of the aforementioned dynamic electromagnetic interference suppression mechanism during long-term, high-load operation, all components (including the shielding layer, the bleeder structure, and the electrodeformable material) underwent rigorous durability testing. Test data showed that after 2000 hours of continuous operation of the punch press, the opening and closing amplitude of the shielding layer remained stable, the conductivity of the bleeder structure did not show a significant decrease, and the response speed and stability of the entire mechanism remained largely unchanged. Furthermore, through multiple comparative tests, the probability of the punch press employing this mechanism falsely triggering its protection mechanism when encountering external electromagnetic interference was reduced by approximately 70% compared to traditional methods, greatly improving equipment stability and production efficiency. This implementation successfully overcomes the limitations of existing technologies that rely on static shielding or a single bleeder path, allowing electromagnetic interference suppression to be adjusted synchronously with the punch press's operating state and load conditions, ensuring that the punch press's electromagnetic environment is always in optimal balance.

[0041] This invention combines a breathable shielding structure with a discharge structure to achieve dynamic absorption and release of electromagnetic interference, enabling interference signals to be isolated and effectively guided in a timely manner, thereby avoiding excessive accumulation and misjudgment of interference energy. Through this innovative mechanism, the punch press equipment can maintain stability under high load and high speed operation, greatly reducing the probability of false triggering of protection devices, improving equipment operating efficiency and production stability, while reducing equipment downtime and the need for manual intervention.

[0042] This invention provides, for example Figure 2 The high-precision punch press remote monitoring system shown includes an electromagnetic image modeling module, an interference path identification module, an energy interception and reversal module, a shielding structure construction module, and a dynamic leakage control module. The electromagnetic image modeling module acquires electromagnetic response data from the motor to the monitoring link along the stroke time axis, captures the transient energy surge process, plots the change trajectory of the interference flash peak in the time domain, and forms an electromagnetic flash peak shadow line covering the entire stroke cycle. The interference path identification module, based on the spatial distribution characteristics of electromagnetic flash shadows, deploys an induction response structure in the area where the cable path meets the base, identifies the electromagnetic energy intrusion location by the change in the intensity of the induction signal, and establishes a set of coupling intrusion anchor points. The energy interception and back-off module embeds a passive ring absorption structure in the path region corresponding to the set of coupling intrusion anchor points, so that the interference energy is partially absorbed in the conduction link, and forms an energy back-off region by the difference in signal before and after absorption, thus constructing a back-off window with defined boundaries. The shielding structure construction module sets micro-isolation seams on the motor housing structure within the space area covered by the folded window. A conductive material layer and a magnetic permeable material layer are superimposed inside the isolation seams to form a breathable shielding structure with dual functions of energy conduction and energy resistance. The dynamic discharge control module, through the phase response behavior of the breathable shielding structure, enables the structure to open and close synchronously with the stroke cycle, and guides the discharge structure connected to the ground wire to release residual interference energy in a time rhythm, thereby breaking the trigger chain of interference signals and maintaining the electromagnetic stability of the punch press operation.

[0043] The present invention provides a method for remote monitoring of a high-precision punch press, which is implemented through the aforementioned high-precision punch press remote monitoring system. For details of the specific method and process of the high-precision punch press remote monitoring system, please refer to the embodiment of the above-mentioned method for remote monitoring of a high-precision punch press, which will not be repeated here.

[0044] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A method for remote monitoring of a high-precision punch press, characterized in that, Includes the following steps: S1, along the stroke time axis, acquire electromagnetic response data from the motor to the monitoring link, capture the transient energy surge process, plot the change trajectory of the interference flash peak in the time domain, and form an electromagnetic flash peak shadow line covering the entire stroke cycle; Step S1 includes: An electromagnetic response acquisition channel is set up, starting from the output end of the main drive motor and ending at the input node of the status monitoring link connecting the motor. Multiple distributed sensing points are set up along the path to collect instantaneous change data of current, voltage and magnetic flux density, and to construct an electromagnetic response timing matrix. By combining the stroke position feedback signal of the punch press stroke controller, the electromagnetic response timing matrix is ​​converted into a three-dimensional stroke mapping array, and each sampling point is spatially and temporally jointly located to identify abnormal flash signals that deviate significantly from the reference state. Trajectory fitting and trend analysis are performed on abnormal signals to extract parameters such as peak amplitude, rising slope and falling attenuation rate. The direction of interference energy transmission is analyzed and a set of interference trajectories is formed. Based on the time sequence, effective interference trajectories are merged to construct an electromagnetic flash peak shadow line covering the entire stroke cycle, forming a representation of the temporal, spatial, and frequency characteristics of the interference energy; S2, based on the spatial distribution characteristics of electromagnetic flash peak shadows, an induction response structure is deployed in the area where the cable path and the base meet. The location of electromagnetic energy intrusion is identified by the change in the intensity of the induction signal, and a set of coupling intrusion anchor points is established. Step S2 includes: Based on the electromagnetic flash peak shadow line, the distribution map of the interference intensity change during different time periods in the stroke is mapped to the physical structure of the punch press to infer the location of the interference source in physical space; Multiple induction response structure units are arranged along the cable path from the motor connection end to the base area. Each unit includes an electric field response layer, a magnetic field response layer and an induction lead connection end, and collects signal data to be synchronously compared with electromagnetic flash peak shadow data. Auxiliary sensing devices were deployed around the main intrusion point to improve the resolution of the spatial energy distribution map and to draw an electromagnetic energy spatial gradient map based on the response potential of the sensing strips. By combining electromagnetic flash peak shadow data and jointly analyzing the temporal sequence and energy response strength of anchor points, occasional responses were eliminated, and recurring anchor point locations were retained. Finally, a complete set of coupled intrusion anchor points was established as the design basis for subsequent interference suppression. S3, a passive ring absorption structure is embedded in the path region corresponding to the set of coupling intrusion anchor points, so that the interference energy is partially absorbed in the conduction link, and an energy folding region is formed by the difference in signals before and after absorption, thus constructing a folding window with defined boundaries; S4. Within the space covered by the folded window, a micro-isolation slit is set on the motor housing structure. A conductive material layer and a magnetic permeable material layer are superimposed in the isolation slit to form a breathable shielding structure with dual functions of energy conduction and energy resistance. S5, through the phase response behavior of the breathable shielding structure, enables the breathable shielding layer in the breathable shielding structure to open and close synchronously with the stroke cycle, and guides the discharge structure connected to the ground wire to release residual interference energy in a time rhythm, thereby breaking the trigger chain of the interference signal and maintaining the electromagnetic stability of the punch press operation.

2. The method for remote monitoring of a high-precision punch press according to claim 1, characterized in that, The time axis calibration and synchronization processing of interference signals are achieved through multi-point synchronous sampling, ensuring that the instantaneous changes of electromagnetic signals are captured in real time at each stage of the stroke, accurately identifying abnormal signals and locating their positions; through spatial-temporal joint positioning, the constructed three-dimensional stroke mapping array can provide a complete electromagnetic response path map.

3. The method for remote monitoring of a high-precision punch press according to claim 1, characterized in that, Step S3 includes: Based on the location of the set of coupling intrusion anchor points, spatial accuracy correction and path projection are performed within the path area, and an anchor point projection path map is established to determine the deployment range of the absorption structure. A passive ring-shaped absorption strip is laid along the cable surface in the defined path area. The absorption strip is made of a composite material of graphite conductive fiber and magnetic oxide powder and is closed in a ring manner to absorb high-frequency harmonics and transient pulse energy non-reflectively. A difference analysis was performed on the signal response before and after the absorption band. An energy reflection region was constructed based on the energy reduction and propagation delay results. The energy dissipation direction was detected by auxiliary detection points to determine the energy shift characteristics. Based on the energy folding phenomenon, an interference propagation boundary is defined between the cable path and the base, forming a three-dimensional folding window, which provides a spatial basis for the subsequent deployment of shielding and leakage devices.

4. The method for remote monitoring of a high-precision punch press according to claim 3, characterized in that, Energy response detection structures are set before and after the absorption band. The energy reduction effect is calibrated by detecting the changes in signal amplitude and time delay characteristics. The detection results are fed back to the absorption band deployment area to dynamically adjust the distribution density of the absorption material, thereby enhancing the spatial attenuation capability of interference energy in the conduction link and stabilizing the boundary position of the folding window.

5. The method for remote monitoring of a high-precision punch press according to claim 3, characterized in that, Step S4 includes: Based on the spatial boundary of the folded window, the position of the micro-isolation seam is determined on the motor housing structure. The micro-isolation seam is set on the contact surface between the motor housing and the punch press base to isolate the propagation path of external interference signals. A conductive material layer is superimposed on the inside of the micro-isolation slit. The conductive material layer is made of high-purity copper foil and is tightly attached to the motor housing to form a continuous conductive path to reduce the intensity of external electromagnetic signals. A magnetic permeable material layer is superimposed on the outside of the conductive material layer. The magnetic permeable material layer is composed of ferrite with high magnetic permeability and is in contact with the conductive layer to form a double shielding structure for electromagnetic fields. This structure is used to absorb high-frequency magnetic fields and convert energy into heat energy for dissipation. A breathable shielding layer is formed on the basis of conductive material layer and magnetic permeable material layer, so that the shielding layer can open and close according to the changes in the motor's working state, adjust the internal and external electromagnetic environment and release the accumulated interference energy to maintain the stable operation of the punch press.

6. The method for remote monitoring of a high-precision punch press according to claim 5, characterized in that, The breathable shielding layer inside the micro-isolation seam includes an adjustable layer made of electrodeformable material. The adjustable layer deforms through electromagnetic induction to drive the shielding layer to open and close slightly, so that the shielding layer automatically releases the accumulated electromagnetic energy when the motor is running under high load and remains sealed under low load conditions, thereby achieving adaptive adjustment to the electromagnetic environment and preventing the accumulation of interference energy.

7. The method for remote monitoring of a high-precision punch press according to claim 5, characterized in that, Step S5 includes: Phase response adjustment is carried out on the basis of the breathable shielding structure. An intelligent response unit is set inside the shielding layer. The shielding layer is driven to open and close synchronously in accordance with the change of electromagnetic field by electrodeformable material, so as to release excess electromagnetic energy. A current-dissipating structure connected to the ground wire is set up. The current-dissipating structure is composed of high-conductivity copper wire and conductive film. It is arranged between the shielding layer and the ground to form a low-impedance discharge channel and releases residual interference energy in a time rhythm during the opening and closing of the shielding layer. A dynamic electromagnetic interference suppression mechanism is established. By adjusting the opening and closing frequency of the shielding layer and the flow rate of the discharge structure, the interference energy is periodically released according to the operating status of the punch press, preventing the interference signal from accumulating in the system. The electromagnetic stability of the punch press is maintained through the long-term synergistic effect of the shielding layer and the leakage structure, thereby improving operational stability and anti-interference performance.

8. A high-precision punch press remote monitoring system, used to implement the high-precision punch press remote monitoring method according to any one of claims 1-7, characterized in that, It includes an electromagnetic image modeling module, an interference path identification module, an energy interception and reflection module, a shielding structure construction module, and a dynamic discharge control module. The electromagnetic image modeling module acquires electromagnetic response data from the motor to the monitoring link along the stroke time axis, captures the transient energy surge process, plots the change trajectory of the interference flash peak in the time domain, and forms an electromagnetic flash peak shadow line covering the entire stroke cycle. The interference path identification module, based on the spatial distribution characteristics of electromagnetic flash shadows, deploys an induction response structure in the area where the cable path meets the base, identifies the electromagnetic energy intrusion location by the change in the intensity of the induction signal, and establishes a set of coupling intrusion anchor points. The energy interception and back-off module embeds a passive ring absorption structure in the path region corresponding to the set of coupling intrusion anchor points, so that the interference energy is partially absorbed in the conduction link, and forms an energy back-off region by the difference in signal before and after absorption, thus constructing a back-off window with defined boundaries. The shielding structure construction module sets micro-isolation seams on the motor housing structure within the space area covered by the folded window. A conductive material layer and a magnetic permeable material layer are superimposed inside the isolation seams to form a breathable shielding structure with dual functions of energy conduction and energy resistance. The dynamic discharge control module, through the phase response behavior of the breathable shielding structure, enables the breathable shielding layer in the breathable shielding structure to open and close synchronously with the stroke cycle, and guides the discharge structure connected to the ground wire to release residual interference energy in a time rhythm, thereby breaking the trigger chain of interference signals and maintaining the electromagnetic stability of the punch press operation.

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