Pressure control method and system for products produced by high-precision steel frame punching machine and computer equipment

Abstract

The invention relates to the technical field of punching machines, in particular to a pressure control method and system for products produced by a high-precision steel frame punching machine and computer equipment. According to the method, the pressure of the punch product is preliminarily adjusted through the load error, the load change is responded in real time, the adjustment can be quickly made when the pressure is too large or too small, the deviation of the surface form can be found in time by obtaining the surface image and the height value in real time and calculating the real-time maximum and minimum curvature and the Gaussian curvature, and the accuracy of the surface form is improved. The pressure is dynamically adjusted according to the curvature difference, surface deformation caused by too large or too small pressure is avoided, the surface flatness and shape accuracy of the product are guaranteed, the quality of the final product can be remarkably improved by continuously monitoring and adjusting the pressure in the production process, and the production efficiency is improved. The pressure is adjusted according to the load error between the actual load and the target load, the feedback speed is increased, real-time adjustment in the production process is ensured, and the precision and efficiency of the whole production process are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of punching machines, and in particular to a pressure control method, system and computer equipment for producing products using a high-precision steel frame punching machine. Background Art

[0002] High-precision steel frame punch presses are special equipment used to manufacture high-precision steel structure components. They are usually used for stamping, forming and processing of metal materials. They are widely used in aviation, automobile, machinery manufacturing, construction and other industries. The main task of these punch presses is to form or cut metal materials (such as steel plates) into specific shapes by applying high pressure. During the stamping process, the target load of the punch press is usually calculated based on preset process parameters, but due to the influence of factors such as material properties, environmental changes, and equipment status, the actual load may differ from the target load, which may cause product deformation, uneven thickness, bending and other problems, affecting the accuracy and quality of the product. Excessive or insufficient pressure of the punch press will not only cause shape deviation, but also cause bending of the surface. Traditional pressure control systems often cannot adjust the pressure in time according to the surface shape, resulting in uncontrollable errors. In traditional pressure control systems, feedback is often lagging and cannot respond to changes in target load and actual load in real time, resulting in untimely pressure adjustment, causing product deformation or quality problems. Summary of the invention

[0003] The main purpose of the present invention is to provide a pressure control method for producing products by a high-precision steel frame punch press, aiming to solve the technical problems in the prior art.

[0004] The present invention provides a pressure control method for producing products by a high-precision steel frame punch press, comprising: Obtaining a target load of the punch press and a contact area of ​​a punch press product, and obtaining a real-time load according to the contact area under a preset pressure; Obtaining a load error according to the real-time load and the target load; Performing preliminary adjustment on the pressure of the punch product according to the load error; Acquire a real-time surface image of the punching product after pressure adjustment, and acquire real-time height values ​​of multiple points on the surface of the punching product according to the real-time surface image; Acquire a real-time maximum curvature and a real-time minimum curvature according to the plurality of real-time height values, and calculate a real-time Gaussian curvature according to the real-time maximum curvature and the real-time minimum curvature; Obtaining an initial Gaussian curvature of a punching machine product, and obtaining a curvature difference according to the initial Gaussian curvature and a real-time Gaussian curvature; The pressure of the punch product is controlled and adjusted according to the curvature difference.

[0005] Preferably, the step of preliminarily adjusting the pressure of the punch product according to the load error comprises: Obtaining a critical gain of the punch press, and obtaining a proportional gain, an integral gain, and a differential gain according to the critical gain; Obtaining a proportional term according to the proportional gain and the load error; Obtaining an integral term according to the integral gain and the load error; Obtaining a differential term according to the differential gain and the load error; The total control amount is calculated according to the differential term, integral term and proportional term, wherein the calculation formula is: ; in, Represents the total control amount, represents the differential term, represents the integral term, represents a proportional term; The pressure of the punch product is preliminarily adjusted according to the total control amount.

[0006] Preferably, the step of obtaining the real-time height values ​​of a plurality of measuring points on the surface of the punching machine product according to the real-time surface image comprises: Multiple incident angles are obtained based on each measurement point where the laser is emitted from the sensor and irradiated onto the surface of the punch product; Multiple reflection angles are obtained by measuring the angle of reflected light from the sensor reflected by the laser beam from each measuring point on the surface of the punch product; Acquire a reflection angle according to each of the reflection angles and the incident angle; Obtaining the distance between the sensor and each measuring point, and obtaining the normal vector of each measuring point according to each distance and the reflection angle; Converting a real-time surface image into a real-time three-dimensional image according to normal vectors of multiple measurement points; A real-time height value of each measuring point is acquired according to the real-time three-dimensional image.

[0007] Preferably, the step of obtaining a real-time maximum curvature and a real-time minimum curvature according to the multiple real-time height values, and calculating a real-time Gaussian curvature according to the real-time maximum curvature and the real-time minimum curvature comprises: Obtaining the second-order partial derivative of each of the real-time height values ​​in the X-axis direction to obtain a corresponding first curvature change value; Obtaining the second-order partial derivative of each of the real-time height values ​​in the Y-axis direction to obtain a corresponding second curvature change value; Obtaining the second-order partial derivative of each of the real-time height values ​​in the mixed direction of the X-axis and the Y-axis to obtain the corresponding third curvature change value; Obtaining a real-time maximum curvature and a real-time minimum curvature according to a plurality of the first curvature change values, the second curvature change values, and the third curvature change values; Obtaining an average curvature according to the real-time maximum curvature and the real-time minimum curvature; The real-time Gaussian curvature is calculated according to the average curvature, the real-time maximum curvature and the real-time minimum curvature, wherein the calculation formula is: ; in, represents the real-time Gaussian curvature, represents the mean curvature, Indicates the real-time maximum curvature, Indicates the real-time minimum curvature.

[0008] Preferably, the step of obtaining a real-time maximum curvature and a real-time minimum curvature according to a plurality of the first curvature change values, the second curvature change values ​​and the third curvature change values ​​comprises: The corresponding first curvature is calculated according to each of the first curvature change value, the second curvature change value and the third curvature change value, wherein the calculation formula is: ; in, represents the first curvature, represents the first curvature change value, represents the second curvature change value, Indicates the third curvature change value; Compare the plurality of first curvatures and select the largest first curvature as the real-time maximum curvature; The corresponding second curvature is calculated according to each of the first curvature change value, the second curvature change value and the third curvature change value, wherein the calculation formula is: ; in, represents the second curvature, represents the first curvature change value, represents the second curvature change value, Indicates the third curvature change value; The plurality of second curvatures are compared, and the minimum second curvature is selected as the real-time minimum curvature.

[0009] Preferably, the step of controlling and adjusting the pressure of the punch product according to the curvature difference comprises: Obtaining a curvature difference, and determining a relationship between the curvature difference and a preset interval; If the curvature difference is less than the upper limit of the preset interval, it is necessary to control and increase the pressure of the punch product until the curvature difference is within the preset interval; If the curvature difference is within the preset range, it is determined that the pressure of the punch product at this time is sufficient for production; If the curvature difference is greater than the lower limit of the preset range, it is necessary to control and reduce the pressure of the punch product until the curvature difference is within the preset range.

[0010] The present application also provides a pressure control system for a product produced by a high-precision steel frame punch press, comprising: A first acquisition module is used to acquire a target load of the punch press and a contact area of ​​a punch press product, and acquire a real-time load according to the contact area under a preset pressure; A second acquisition module, used for acquiring a load error according to the real-time load and the target load; A first adjustment module, used for preliminarily adjusting the pressure of the punch product according to the load error; A third acquisition module is used to acquire a real-time surface image of the punching product after the pressure is adjusted, and acquire real-time height values ​​of multiple points on the surface of the punching product according to the real-time surface image; A calculation module, used for obtaining a real-time maximum curvature and a real-time minimum curvature according to the multiple real-time height values, and calculating a real-time Gaussian curvature according to the real-time maximum curvature and the real-time minimum curvature; A fourth acquisition module is used to acquire the initial Gaussian curvature of the punching machine product, and acquire the curvature difference according to the initial Gaussian curvature and the real-time Gaussian curvature; The second adjustment module is used to control and adjust the pressure of the punch product according to the curvature difference.

[0011] Preferably, the third acquisition module comprises: A first acquisition unit is used to acquire a plurality of incident angles according to each measuring point where the laser is emitted from the sensor and irradiated to the surface of the punching machine product; A second acquisition unit is used to acquire multiple reflection angles according to the angle of reflected light measured by the sensor when the laser beam is reflected from each measuring point on the surface of the punching machine product; A third acquisition unit, used to acquire a reflection angle according to each of the reflection angles and the incident angle; A fourth acquisition unit, used to acquire the distance between the sensor and each measurement point, and acquire the normal vector of each measurement point according to each distance and the reflection angle; A conversion unit, for converting a real-time surface image into a real-time three-dimensional image according to normal vectors of a plurality of measurement points; A fifth acquisition unit is used to acquire a real-time height value of each measuring point according to the real-time three-dimensional image.

[0012] The present invention also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the pressure control method for producing products by the above-mentioned high-precision steel frame punching machine are implemented.

[0013] The present invention also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the pressure control method for producing products with the high-precision steel frame punching machine are implemented.

[0014] The beneficial effects of the present invention are as follows: the present invention makes a preliminary adjustment to the pressure of the punching machine product through the load error, realizes real-time response to load changes, and can quickly make adjustments when the pressure is too large or too small. This precise load control avoids the problem of feedback lag in traditional control systems, making the pressure adjustment of the punching machine more timely and accurate. By acquiring the surface image and height value in real time and calculating the real-time maximum and minimum curvature and Gaussian curvature, the deviation of the surface morphology can be discovered in time, and the pressure can be dynamically adjusted according to the curvature difference, avoiding surface deformation caused by excessive or insufficient pressure, ensuring the surface flatness and shape accuracy of the product, and continuously monitoring and adjusting the pressure during the production process. The quality of the final product can be significantly improved. By adjusting the pressure according to the load error between the actual load and the target load, the feedback speed can be significantly improved through real-time load and surface morphology feedback, ensuring real-time adjustment during the production process, reducing error accumulation and unnecessary delays, and improving the accuracy and efficiency of the entire production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of a method flow according to an embodiment of the present invention.

[0016] Figure 2 FIG. 1 is a schematic diagram of a device structure according to an embodiment of the present invention.

[0017] Figure 3 A schematic diagram of the internal structure of a computer device according to an embodiment of the present application.

[0018] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0020] like Figure 1-Figure 3 As shown, the present application provides a pressure control method for producing products by a high-precision steel frame punch press, comprising: S1. Obtain the target load of the punch press and the contact area of ​​the punch press product, and obtain the real-time load according to the contact area under a preset pressure; S2. Obtaining a load error according to the real-time load and the target load; S3, preliminarily adjusting the pressure of the punch product according to the load error; S4, obtaining a real-time surface image of the punching product after pressure adjustment, and obtaining real-time height values ​​of multiple points on the surface of the punching product according to the real-time surface image; S5. acquiring a real-time maximum curvature and a real-time minimum curvature according to the plurality of real-time height values, and calculating a real-time Gaussian curvature according to the real-time maximum curvature and the real-time minimum curvature; S6. Obtaining an initial Gaussian curvature of the punch product, and obtaining a curvature difference according to the initial Gaussian curvature and the real-time Gaussian curvature; S7. Control and adjust the pressure of the punch product according to the curvature difference.

[0021] As described in the above steps S1-S7, during the stamping process, the target load of the punch press is usually calculated based on preset process parameters. However, due to the influence of factors such as material properties, environmental changes, and equipment status, the actual load may differ from the target load, which may cause product deformation, uneven thickness, bending, and other problems, affecting the precision and quality of the product. Excessive or insufficient pressure of the punch press will not only cause shape deviation, but also cause bending of the surface. Traditional pressure control systems are often unable to adjust the pressure in time according to the surface shape, resulting in uncontrollable errors. In traditional pressure control systems, feedback is often lagging and unable to respond to changes in the target load and the actual load in real time, resulting in untimely pressure adjustment, causing product deformation or quality problems. The present invention obtains the real-time load according to the contact area under the preset pressure, obtains the load error through the real-time load and the target load, and preliminarily adjusts the pressure of the punching machine product according to the load error. The method realizes real-time response to load changes and can quickly make adjustments when the pressure is too large or too small. This precise load control avoids the problem of feedback lag in the traditional control system, making the pressure adjustment of the punching machine more timely and accurate. In the case of inaccurate pressure, the punching machine product may have shape deviations or even surface bending, which affects the product quality. The present invention obtains the real-time surface image of the punching machine product after pressure adjustment, obtains the real-time height values ​​of multiple points on the surface of the punching machine product according to the real-time surface image, obtains the real-time maximum curvature and the real-time minimum curvature through the multiple real-time height values, and calculates the real-time Gaussian curvature according to the real-time maximum curvature and the real-time minimum curvature. By obtaining the surface image and height value in real time and calculating the real-time maximum and minimum curvatures and Gaussian curvature, the deviation of the surface morphology can be discovered in time, and the pressure is dynamically adjusted according to the curvature difference, avoiding the pressure caused by excessive or insufficient pressure. Surface deformation ensures the surface flatness and shape accuracy of the product. By continuously monitoring and adjusting the pressure during the production process, especially based on feedback adjustment of surface morphology (such as curvature), the quality of the final product can be significantly improved. Especially in precision manufacturing or production processes with high requirements for shape and surface, the traditional method is avoided from being unable to respond to deformation in real time, thereby ensuring the quality consistency and accuracy of each product. Traditional pressure control systems may cause multiple adjustments and corrections due to adjustment lag or inaccuracy, increasing time and resource waste in the production process. Through real-time control and adjustment of this method, the number of over-adjustments can be effectively reduced, material waste can be reduced, and the generation of defective products can be reduced, thereby improving production efficiency and reducing production costs. The present invention has strong adaptability and can not only handle conventional pressure control problems, but also handle complex situations through real-time surface shape feedback. Whether the pressure changes rapidly or environmental factors change, the system can be quickly adjusted according to real-time data, enhancing the flexibility and stability of the punch system in different production environments. The present invention obtains the curvature difference through the initial Gaussian curvature and the real-time Gaussian curvature.Then, the pressure of the punching machine product is controlled and adjusted according to the curvature difference. The pressure is adjusted according to the load error between the actual load and the target load. Through the feedback of real-time load and surface morphology, the feedback speed can be significantly improved, ensuring real-time adjustment in the production process, reducing the accumulation of errors and unnecessary delays, and improving the accuracy and efficiency of the entire production process. Traditional pressure control systems often require manual intervention to correct the pressure setting, while the pressure regulation system based on real-time surface morphology and curvature feedback reduces the dependence on manual intervention. Automatic control not only reduces the risk of human operation errors, but also can perform production control more stably and continuously. The present invention makes each pressure adjustment more in line with production requirements through precise adjustment and real-time feedback of pressure control, avoiding the negative effects (such as deformation, cracks, etc.) caused by excessive or insufficient pressure. This reliability improvement is particularly important for high-quality and high-standard production, especially for high-precision stamping parts and products with strict shape requirements. Not only does it focus on real-time pressure adjustment, but it also optimizes the production process through highly accurate surface morphology monitoring, especially in the close relationship between pressure and surface morphology, which can significantly reduce product defects caused by improper pressure control and improve the overall production quality. ,

[0022] In one embodiment, the step S3 of preliminarily adjusting the pressure of the punch product according to the load error includes: S31, obtaining a critical gain of the punch press, and obtaining a proportional gain, an integral gain and a differential gain according to the critical gain; S32, calculating a proportional term according to the product of the proportional gain and the load error; S33, calculating the integral term according to the integral gain and the load error, wherein the calculation formula is: ; in, represents the integral term, represents the integral gain, Indicates load error, that is, the load error at each time step, Indicates the time interval between each control update. represents the amount of load error, Indicates the serial number of the load error; S34, calculating the differential term according to the differential gain and the load error, wherein the calculation formula is: ; in, represents the differential term, represents the differential gain, Indicates A load error, Indicates A load error, Indicates the serial number of the load error, Indicates the time interval between each control update; S35. Calculate the total control amount according to the differential term, integral term and proportional term, wherein the calculation formula is: ; in, Represents the total control amount, represents the differential term, represents the integral term, represents a proportional term; S36, preliminarily adjusting the pressure of the punch product according to the total control amount.

[0023] As described in the above steps S31-S36, the present invention obtains the proportional gain, the integral gain and the differential gain through the critical gain, obtains the proportional term through the proportional gain and the load error, obtains the integral term through the integral gain and the load error, obtains the differential term through the differential gain and the load error, and then calculates the total control amount through the differential term, the integral term and the proportional term, wherein the proportional gain may be 0.6 times the critical gain, the integral gain may be twice the ratio of the proportional gain to the critical gain, and the differential gain may be one eighth of the product of the proportional gain and the critical gain, For the punching machine pressure control system, the PID control method can effectively deal with excessive or insufficient pressure, thereby reducing quality problems such as shape deviation and surface bending caused by improper pressure adjustment. By reasonably selecting proportional gain, integral gain and differential gain, a rapid response to load changes can be achieved, avoiding the lag phenomenon in traditional control systems. The PID controller can adjust the control amount in real time according to the feedback signal, so that the system can quickly adapt to pressure changes. Proportional gain adjustment can enable the system to quickly reduce deviations to a certain extent, while the integral gain eliminates the steady-state error in the system by continuously accumulating errors, and the differential gain accelerates the adjustment process by foreseeing the changing trend of the system. This combination of the three can greatly improve the control accuracy and avoid quality problems caused by insufficient or excessive pressure. Traditional control systems may have feedback lag problems, resulting in failure to adjust the pressure in time, which in turn causes surface bending or shape deviation. Through the PID control strategy, the system can adjust the pressure in real time, accurately match the required target pressure, reduce these shape deviations, and ensure the quality of the product. For situations with large load fluctuations, PID control can be used during load changes. The pressure is automatically adjusted when the pressure is too high or too low to avoid adverse consequences caused by excessive or too low pressure. This ensures that the punch press can maintain stable product quality under different load conditions. In traditional control systems, the feedback signal usually has a lag, which leads to untimely response to the pressure adjustment and error accumulation. Through PID control, especially the introduction of differential terms, the dynamic response speed of the system can be improved and the lag phenomenon can be reduced. Through reasonable gain selection (especially the critical gain method), the stability of the system can be optimized to avoid oscillation or instability in the system. This is especially important for precision-controlled punch presses. The PID controller can dynamically adjust the gains according to different working states, so as to adapt to changes under different production conditions and has high flexibility. This method can adjust parameters as needed under different production batches or different working conditions, thereby ensuring continuous quality control. Since the PID controller can consider the three factors of proportion, integration and differentiation at the same time, it shows strong adaptability and processing capabilities when dealing with complex problems (such as load changes, pressure fluctuations, external disturbances, etc.), and avoids waste caused by excessive or insufficient pressure through precise pressure control.For example, excessive pressure may lead to energy waste, while insufficient pressure may require multiple adjustments and corrections, extending the production cycle. PID control can adjust to the required pressure value in the shortest time, thereby reducing the adjustment time of the punch press and improving the efficiency of the production line. The precise control system can reduce the loss of equipment caused by excessive or insufficient pressure, reduce the frequency of equipment failure and maintenance, and through automated PID control, it can extend the service life of the equipment and improve the reliability of the equipment. Through the correct gain parameter setting, the PID control system can maintain a stable control effect in long-term operation, thereby ensuring the stable production of the punch press.

[0024] In one embodiment, the step S4 of acquiring the real-time height values ​​of a plurality of measuring points on the surface of the punching machine product according to the real-time surface image comprises: S41, obtaining a plurality of incident angles according to each measuring point where the laser is emitted from the sensor and irradiated to the surface of the punching machine product; S42, obtaining a plurality of reflection angles according to the angle of the reflected light measured by the sensor when the laser beam is reflected from each measuring point on the surface of the punching machine product; S43, obtaining a reflection angle according to each of the reflection angles and the incident angle; S44, obtaining the distance between the sensor and each measuring point, and obtaining the normal vector of each measuring point according to each distance and the reflection angle; S45, converting the real-time surface image into a real-time three-dimensional image according to the normal vectors of the plurality of measurement points; S46. Acquire a real-time height value of each measuring point according to the real-time three-dimensional image.

[0025] As described in the above steps S41-S46, the present invention obtains multiple incident angles according to each measuring point on the surface of the punch product emitted from the sensor and irradiated by the laser, obtains multiple reflection angles according to the angle of the reflected light measured by the sensor when the laser beam is reflected from each measuring point on the surface of the punch product, and then obtains the reflection angle according to each reflection angle and the incident angle, obtains the normal vector of each measuring point through the distance between the sensor and each measuring point and the reflection angle, converts the real-time surface image into a real-time three-dimensional image according to the normal vectors of the multiple measuring points, and then obtains the real-time height value of each measuring point through the real-time three-dimensional image, obtains the normal vector by measuring the incident angle and reflection angle of each point, and generates Real-time three-dimensional images enable the system to monitor the deformation or deformation of the product surface in real time during the punching process. Compared with the traditional pressure control system, this real-time monitoring capability greatly improves the speed and accuracy of feedback. In the traditional pressure control system, the adjustment of pressure depends on the approximate load and rough judgment of the product surface, which may cause excessive or insufficient pressure, thus affecting the product quality. By obtaining the surface height information of each measuring point in real time, the pressure can be controlled more accurately to avoid excessive or insufficient pressure causing shape deviation and surface bending. The traditional pressure control system has a relatively lagging feedback and often cannot respond to changes in the product surface morphology in time, resulting in untimely pressure adjustment, which ultimately causes In case of product deformation or quality problems, the system can quickly identify subtle changes in surface deformation and make corrections by adjusting the pressure in real time, thereby effectively reducing the risk of errors and product deformation. By acquiring three-dimensional images and height values ​​in real time, the system can automatically analyze the surface conditions of the product and automatically adjust the pressure according to the real-time data, thereby reducing manual intervention and operating errors, improving production efficiency and product quality. By detecting and adjusting the pressure in real time, the system can quickly respond to changes in production, avoiding production stagnation or product waste caused by delayed pressure adjustment in traditional control methods, thereby improving overall production efficiency. Accurately controlling pressure and real-time monitoring of surface deformation help ensure the uniformity and stability of the product surface. Avoiding surface defects or uneven physical properties caused by excessive or low pressure is crucial to the surface quality, shape accuracy and overall strength of stamped products. By reducing product defects and rework caused by deformation and unstable pressure, the system can effectively reduce production costs caused by unqualified products. Real-time three-dimensional imaging and feedback control make pressure adjustment more precise, thereby reducing material waste and production losses. The present invention can provide higher accuracy, faster response speed and stronger adaptability in the punching machine production process, and solves the lag and error problems existing in traditional pressure control systems, thereby effectively improving production quality, reducing defects, improving production efficiency, and ultimately reducing production costs.

[0026] In one embodiment, the step S5 of acquiring the real-time maximum curvature and the real-time minimum curvature according to the multiple real-time height values, and calculating the real-time Gaussian curvature according to the real-time maximum curvature and the real-time minimum curvature includes: S51, obtaining the second-order partial derivative of each real-time height value in the X-axis direction to obtain the corresponding first curvature change value; S52, obtaining the second-order partial derivative of each real-time height value in the Y-axis direction to obtain a corresponding second curvature change value; S53, obtaining the second-order partial derivative of each of the real-time height values ​​in the mixed direction of the X-axis and the Y-axis to obtain the corresponding third curvature change value; S54, obtaining a real-time maximum curvature and a real-time minimum curvature according to the first curvature change values, the second curvature change values, and the third curvature change values; S55, obtaining an average curvature according to the real-time maximum curvature and the real-time minimum curvature; S56. Calculate the real-time Gaussian curvature according to the average curvature, the real-time maximum curvature and the real-time minimum curvature, wherein the calculation formula is: ; in, represents the real-time Gaussian curvature, represents the mean curvature, Indicates the real-time maximum curvature, Indicates the real-time minimum curvature.

[0027] As described in the above steps S51-S56, the present invention obtains the corresponding first curvature change value, second curvature change value and third curvature change value respectively by obtaining the second-order partial derivative of each real-time height value in the X-axis direction, the second-order partial derivative in the Y-axis direction and the second-order partial derivative in the mixed direction of the X-axis and the Y-axis, and then obtains the real-time maximum curvature and the real-time minimum curvature according to the multiple first curvature change values, the second curvature change values ​​and the third curvature change values, obtains the average curvature according to half of the sum of the real-time maximum curvature and the real-time minimum curvature, and then calculates the real-time Gaussian curvature according to the average curvature, the real-time maximum curvature and the real-time minimum curvature. Traditional pressure control systems often rely on a single pressure sensor or other relatively lagging feedback mechanisms, and it is difficult to accurately perceive the changes in the actual product surface shape. By calculating the different curvatures of the surface in real time and obtaining the real-time maximum curvature, minimum curvature, average curvature and Gaussian curvature, the surface deformation of the workpiece can be monitored in real time. This allows the pressure to be adjusted more timely during the production process, avoiding product deformation and quality problems caused by excessive or insufficient pressure. Since the impact of punch pressure on surface shape is directly related to product quality, precise pressure control can significantly improve product surface quality. Accurate adjustment of stamping pressure can reduce problems such as surface bending and distortion caused by uneven pressure distribution during stamping, thereby ensuring that the surface shape is highly consistent with design requirements and avoiding unnecessary surface defects. Excessive or low punch pressure will not only cause errors in the surface shape of the workpiece, but may also cause material waste. By optimizing pressure in real time, the waste of raw materials can be minimized while ensuring product quality. Traditional pressure control systems often rely on a large amount of testing, debugging and manual feedback, which may lead to long cycles and low efficiency in the production process. By adjusting pressure in real time, it is possible to quickly respond to load changes during the production process, avoid downtime and over-adjustment in production, and thus improve production efficiency. In traditional control systems, due to feedback delays, pressure adjustment often cannot be synchronized with surface deformation, resulting in uncontrollable errors.Adjusting the pressure based on real-time acquired surface curvature data can respond to surface changes more accurately, reduce hysteresis, and enable pressure adjustments to match workpiece shape changes in real time, reducing error accumulation and transmission. By acquiring curvature change values ​​in multiple directions and calculating the real-time maximum and minimum curvatures, changes in the workpiece surface shape can be judged very carefully. This meticulous monitoring and control can effectively avoid local shape deviations caused by excessive or insufficient punch pressure, especially in high-precision machining. It can maintain shape consistency and uniformity and prevent uneven deformation in local areas. By calculating curvature changes in different directions through high-order partial derivatives, the pressure control system not only relies on a single sensor data, but also combines multiple feedback information. This system is more intelligent and can handle complex deformation processes and make fast and accurate adjustments. Accurate curvature analysis and pressure control mechanisms greatly enhance the predictability of the production process. By continuously optimizing and adjusting the pressure, the probability of sudden problems can be reduced, the controllability and consistency of production are greatly improved, and dependence on abnormal situations is reduced.

[0028] In one embodiment, the step S54 of acquiring the real-time maximum curvature and the real-time minimum curvature according to the plurality of the first curvature change values, the second curvature change values ​​and the third curvature change values ​​comprises: S541. Calculate a corresponding first curvature according to each of the first curvature change value, the second curvature change value, and the third curvature change value, wherein the calculation formula is: ; in, represents the first curvature, represents the first curvature change value, represents the second curvature change value, Indicates the third curvature change value; S542, comparing the plurality of first curvatures, and selecting the largest first curvature as the real-time maximum curvature; S543: Calculate a corresponding second curvature according to each of the first curvature change value, the second curvature change value, and the third curvature change value, wherein the calculation formula is: ; in, represents the second curvature, represents the first curvature change value, represents the second curvature change value, Indicates the third curvature change value; S544: Compare the multiple second curvatures and select the minimum second curvature as the real-time minimum curvature.

[0029] As described in the above steps S541-S544, the present invention calculates the corresponding first curvature through each first curvature change value, the second curvature change value and the third curvature change value, and compares multiple first curvatures to select the largest first curvature as the real-time maximum curvature, and calculates the corresponding second curvature through each first curvature change value, the second curvature change value and the third curvature change value, and compares multiple second curvatures to select the smallest second curvature as the real-time minimum curvature. By performing curvature analysis on the surface of each measuring point, the changes in the product surface during the stamping process can be understood in detail. The curvature values ​​in different directions (X-axis, Y-axis, and mixed directions) provide rich geometric information, which is helpful to accurately identify whether there is local shape deviation or bending on the workpiece surface. By calculating the real-time maximum curvature and the real-time minimum curvature, it is possible to more accurately evaluate whether the surface morphology is unevenly deformed, and adjust the punch pressure in time to avoid excessive pressure or excessive The shape deviation and surface curvature caused by the small size are ensured to ensure the accuracy of the product surface morphology. In traditional pressure control systems, feedback is often delayed and cannot respond to product surface deformation or load changes in real time, resulting in untimely pressure adjustment, thereby causing product deformation and quality problems. The present invention can evaluate the curvature changes of the workpiece surface in real time through the curvature calculation results, and adjust the pressure according to the real-time maximum curvature and minimum curvature. Since these parameters can directly reflect the surface changes, the pressure adjustment can be matched with the surface changes almost instantly, thus avoiding the problem of hysteresis. By selecting the largest first curvature and the smallest second curvature, the method can carefully monitor the surface changes of each measuring point and optimize and adjust according to the curvature information, which can effectively prevent bending or unevenness in local areas and ensure that the shape of the entire product meets the expected design standards. This precise control avoids product quality problems caused by uneven or inappropriate pressure and improves product consistency.

[0030] In one embodiment, the step S7 of controlling and adjusting the pressure of the punch product according to the curvature difference includes: S71, obtaining a curvature difference, and determining a relationship between the curvature difference and a preset interval; S72, if the curvature difference is less than the upper limit of the preset interval, it is necessary to control and increase the pressure of the punch product until the curvature difference is within the preset interval; S73, if the curvature difference is within the preset range, it is determined that the pressure of the punch product at this time is sufficient for production; S74. If the curvature difference is greater than the lower limit of the preset interval, it is necessary to control and reduce the pressure of the punch product until the curvature difference is within the preset interval.

[0031] As described in the above steps S71-S74, the present invention determines the relationship between the curvature difference and the preset interval. If the curvature difference is less than the upper limit of the preset interval, it is necessary to control the pressure of the punch product to increase until the curvature difference is within the preset interval. If the curvature difference is within the preset interval, it is determined that the pressure of the punch product at this time satisfies the production. If the curvature difference is greater than the lower limit of the preset interval, it is necessary to control the pressure of the punch product to decrease until the curvature difference is within the preset interval. By dynamically adjusting the pressure according to the relationship between the curvature difference and the preset interval, the shape of the punch product can be made more consistent with the design requirements, thereby reducing the shape deviation, and effectively avoiding the shape error and surface bending caused by improper pressure adjustment in the traditional pressure control system. In the traditional system, excessive pressure will cause excessive deformation or rupture on the surface of the punch product, and insufficient pressure may cause incomplete product processing. By real-time monitoring of the curvature difference and adjusting the pressure according to its changes, these problems can be effectively avoided, thereby improving the surface quality of the product. By dynamically adjusting the pressure, it can respond quickly when deviations occur, thereby controlling the quality of the product in real time. This not only improves production efficiency, but also reduces the scrap rate caused by inappropriate pressure. By adjusting the pressure of the punch press according to actual load changes rather than relying solely on statically set pressure values, the shape and surface state of the product can be accurately controlled, and the accuracy and consistency of production can be improved. By adjusting the pressure in real time according to the curvature difference, the production process can be ensured to be uninterrupted and production failures due to insufficient pressure can be avoided. By integrating the relationship between curvature difference and pressure for dynamic adjustment, the system does not rely solely on a simple set pressure value, but has a higher level of intelligence. This method makes the production process more adaptive and flexible, and can adjust the production strategy based on real-time feedback. Therefore, it can not only effectively avoid shape deviation and surface bending, but also improve the intelligence level of the system, providing more precise and real-time pressure control for punch press production.

[0032] The present application also provides a pressure control system for a product produced by a high-precision steel frame punch press, comprising: A first acquisition module is used to acquire a target load of the punch press and a contact area of ​​a punch press product, and acquire a real-time load according to the contact area under a preset pressure; A second acquisition module, used for acquiring a load error according to the real-time load and the target load; A first adjustment module, used for preliminarily adjusting the pressure of the punch product according to the load error; A third acquisition module is used to acquire a real-time surface image of the punching product after the pressure is adjusted, and acquire real-time height values ​​of multiple points on the surface of the punching product according to the real-time surface image; A calculation module, used for obtaining a real-time maximum curvature and a real-time minimum curvature according to the plurality of real-time height values, and calculating a real-time Gaussian curvature according to the real-time maximum curvature and the real-time minimum curvature; A fourth acquisition module is used to acquire the initial Gaussian curvature of the punching machine product, and acquire the curvature difference according to the initial Gaussian curvature and the real-time Gaussian curvature; The second adjustment module is used to control and adjust the pressure of the punch product according to the curvature difference.

[0033] In one embodiment, the third acquisition module includes: A first acquisition unit is used to acquire a plurality of incident angles according to each measuring point where the laser is emitted from the sensor and irradiated to the surface of the punching machine product; A second acquisition unit is used to acquire multiple reflection angles according to the angle of reflected light measured by the sensor when the laser beam is reflected from each measuring point on the surface of the punching machine product; A third acquisition unit, used to acquire a reflection angle according to each of the reflection angles and the incident angle; A fourth acquisition unit, used to acquire the distance between the sensor and each measurement point, and acquire the normal vector of each measurement point according to each distance and the reflection angle; A conversion unit, for converting a real-time surface image into a real-time three-dimensional image according to normal vectors of a plurality of measurement points; A fifth acquisition unit is used to acquire a real-time height value of each measuring point according to the real-time three-dimensional image.

[0034] It should be noted that each module and unit in the pressure control system of the high-precision steel frame punching machine production product corresponds one by one to the steps in the pressure control method of the high-precision steel frame punching machine production product.

[0035] like Figure 3 As shown, the present application also provides a computer device, which may be a server, and its internal structure may be as shown in Figure 3 As shown. The computer device includes a processor, a memory, a network interface and a database connected through a system bus. Among them, the processor designed by the computer is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store all data required for the process of the pressure control method for producing products by a high-precision steel frame punching machine. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, the pressure control method for producing products by a high-precision steel frame punching machine is implemented.

[0036] Those skilled in the art will understand that Figure 3The structure shown in is merely a block diagram of a portion of the structure related to the present application solution and does not constitute a limitation on the computer device to which the present application solution is applied.

[0037] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, any one of the above-mentioned pressure control methods for producing products using a high-precision steel frame punch press is implemented.

[0038] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media provided in this application and used in the embodiments may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (SSRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0039] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, device, article or method including the element.

[0040] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for controlling the pressure of products produced by a high-precision steel frame punch press, characterized in that: include: Obtaining a contact area of ​​a punching machine product, and obtaining a real-time load according to the contact area under a preset pressure; Obtaining a target load of the punch press, and obtaining a load error according to the real-time load and the target load; Performing preliminary adjustment on the pressure of the punch product according to the load error; Acquire a real-time surface image of the punching product after pressure adjustment, and acquire real-time height values ​​of multiple measuring points on the surface of the punching product according to the real-time surface image; Acquire a real-time maximum curvature and a real-time minimum curvature according to the plurality of real-time height values, and calculate a real-time Gaussian curvature according to the real-time maximum curvature and the real-time minimum curvature; Obtaining an initial Gaussian curvature of a punching machine product, and obtaining a curvature difference according to the initial Gaussian curvature and a real-time Gaussian curvature; The pressure of the punch product is controlled and adjusted according to the curvature difference.

2. The pressure control method for producing products by a high-precision steel frame punch press according to claim 1 is characterized in that: The step of preliminarily adjusting the pressure of the punch product according to the load error comprises: Obtaining a critical gain of the punch press, and obtaining a proportional gain, an integral gain, and a differential gain according to the critical gain; Obtaining a proportional term according to the proportional gain and the load error; Obtaining an integral term according to the integral gain and the load error; Obtaining a differential term according to the differential gain and the load error; The total control amount is calculated according to the differential term, integral term and proportional term, wherein the calculation formula is: ; in, Represents the total control amount, represents the differential term, represents the integral term, represents a proportional term; The pressure of the punch product is preliminarily adjusted according to the total control amount.

3. The pressure control method for producing products by a high-precision steel frame punch press according to claim 1 is characterized in that: The step of obtaining the real-time height values ​​of a plurality of measuring points on the surface of the punching machine product according to the real-time surface image comprises: Multiple incident angles are obtained based on each measurement point where the laser is emitted from the sensor and irradiated onto the surface of the punch product; Multiple reflection angles are obtained by measuring the angle of reflected light from the sensor reflected by the laser beam from each measuring point on the surface of the punch product; Acquire a reflection angle according to each of the reflection angles and the incident angle; Obtaining the distance between the sensor and each measuring point, and obtaining the normal vector of each measuring point according to each distance and the reflection angle; Converting a real-time surface image into a real-time three-dimensional image according to normal vectors of multiple measurement points; A real-time height value of each measuring point is acquired according to the real-time three-dimensional image.

4. The pressure control method for producing products by a high-precision steel frame punch press according to claim 1 is characterized in that: The step of obtaining a real-time maximum curvature and a real-time minimum curvature according to the multiple real-time height values, and calculating a real-time Gaussian curvature according to the real-time maximum curvature and the real-time minimum curvature comprises: Obtaining the second-order partial derivative of each of the real-time height values ​​in the X-axis direction to obtain a corresponding first curvature change value; Obtaining the second-order partial derivative of each of the real-time height values ​​in the Y-axis direction to obtain a corresponding second curvature change value; Obtaining the second-order partial derivative of each of the real-time height values ​​in the mixed direction of the X-axis and the Y-axis to obtain the corresponding third curvature change value; Obtaining a real-time maximum curvature and a real-time minimum curvature according to a plurality of the first curvature change values, the second curvature change values, and the third curvature change values; Obtaining an average curvature according to the real-time maximum curvature and the real-time minimum curvature; The real-time Gaussian curvature is calculated according to the average curvature, the real-time maximum curvature and the real-time minimum curvature, wherein the calculation formula is: ; in, represents the real-time Gaussian curvature, represents the mean curvature, Indicates the real-time maximum curvature, Indicates the real-time minimum curvature.

5. The pressure control method for producing products by a high-precision steel frame punch press according to claim 4 is characterized in that: The step of obtaining a real-time maximum curvature and a real-time minimum curvature according to the first curvature change values, the second curvature change values ​​and the third curvature change values ​​comprises: The corresponding first curvature is calculated according to each of the first curvature change value, the second curvature change value and the third curvature change value, wherein the calculation formula is: ; in, represents the first curvature, represents the first curvature change value, represents the second curvature change value, Indicates the third curvature change value; Compare the plurality of first curvatures and select the largest first curvature as the real-time maximum curvature; The corresponding second curvature is calculated according to each of the first curvature change value, the second curvature change value and the third curvature change value, wherein the calculation formula is: ; in, represents the second curvature, represents the first curvature change value, represents the second curvature change value, Indicates the third curvature change value; The plurality of second curvatures are compared, and the minimum second curvature is selected as the real-time minimum curvature.

6. The pressure control method for producing products by a high-precision steel frame punch press according to claim 1 is characterized in that: The step of controlling and adjusting the pressure of the punch product according to the curvature difference comprises: Obtaining a curvature difference, and determining a relationship between the curvature difference and a preset interval; If the curvature difference is less than the upper limit of the preset interval, it is necessary to control and increase the pressure of the punch product until the curvature difference is within the preset interval; If the curvature difference is within the preset range, it is determined that the pressure of the punch product at this time is sufficient for production; If the curvature difference is greater than the lower limit of the preset range, it is necessary to control and reduce the pressure of the punch product until the curvature difference is within the preset range.

7. A pressure control system for products produced by a high-precision steel frame punch press, characterized in that: include: A first acquisition module is used to acquire a target load of the punch press and a contact area of ​​a punch press product, and acquire a real-time load according to the contact area under a preset pressure; A second acquisition module, used for acquiring a load error according to the real-time load and the target load; A first adjustment module, used for preliminarily adjusting the pressure of the punch product according to the load error; A third acquisition module is used to acquire a real-time surface image of the punching product after the pressure is adjusted, and acquire real-time height values ​​of multiple points on the surface of the punching product according to the real-time surface image; A calculation module, used for obtaining a real-time maximum curvature and a real-time minimum curvature according to the plurality of real-time height values, and calculating a real-time Gaussian curvature according to the real-time maximum curvature and the real-time minimum curvature; A fourth acquisition module is used to acquire the initial Gaussian curvature of the punching machine product, and acquire the curvature difference according to the initial Gaussian curvature and the real-time Gaussian curvature; The second adjustment module is used to control and adjust the pressure of the punch product according to the curvature difference.

8. The pressure control system for the product produced by the high-precision steel frame punch press according to claim 7 is characterized in that: The third acquisition module includes: A first acquisition unit is used to acquire a plurality of incident angles according to each measuring point where the laser is emitted from the sensor and irradiated to the surface of the punching machine product; A second acquisition unit is used to acquire multiple reflection angles according to the angle of reflected light measured by the sensor when the laser beam is reflected from each measuring point on the surface of the punching machine product; A third acquisition unit, used to acquire a reflection angle according to each of the reflection angles and the incident angle; A fourth acquisition unit, used to acquire the distance between the sensor and each measurement point, and acquire the normal vector of each measurement point according to each distance and the reflection angle; A conversion unit, for converting a real-time surface image into a real-time three-dimensional image according to normal vectors of a plurality of measurement points; A fifth acquisition unit is used to acquire a real-time height value of each measuring point according to the real-time three-dimensional image.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

Images