A plate forming device convenient for stripping

Abstract

The present invention provides a sheet forming device that is convenient for stripping, which relates to the field of automobile parts processing, including a press, an upper mold and a lower mold, an air nozzle, an air supply device, a turning device, and a data acquisition module for collecting production data in real time through sensors; a timing control module for adjusting the frequency of the airflow according to historical production data to adjust the airflow intensity. Within the preset working condition range, the higher the airflow frequency, the greater the airflow intensity; a visual collaboration module for dynamically adjusting the airflow frequency by detecting the offset of the formed sheet position relative to the preset reference position, and feeding the offset back to the timing control module in real time to optimize the stripping path; an air nozzle blockage detection module for real-time monitoring the injection status of the air nozzle and detecting whether the air nozzle is blocked. The present invention improves the automated production efficiency of the sheet forming and stripping process through high-frequency airflow control and adjustment, visual feedback, adaptive strategy and intelligent monitoring of the air nozzle.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts processing, in particular to a plate forming device which is convenient for stripping. Background Art

[0002] Sheet metal forming devices are widely used in industries such as automobile manufacturing, home appliances, and electronic products. Especially in automobile body manufacturing, sheet metal stamping technology is widely used.

[0003] Related sheet metal forming devices often use traditional demoulding structures such as springs and ejector pins. When processing workpieces with complex shapes or large sizes, it is easy to cause deformation, strain or surface damage to the workpiece, which can easily lead to unstable demoulding. Especially in high-speed, large-scale production processes, these problems will further affect the efficiency and quality of demoulding. At the same time, after the spring pin pushes the formed sheet metal out of the mold, it is also necessary to cooperate with the robotic arm and other material-picking mechanisms to completely move the formed sheet metal out of the mold so that the next cycle of sheet metal forming can be carried out. This process requires waiting for the robotic arm and other material-picking mechanisms to move in and out, which is not conducive to improving the efficiency of automated production. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a sheet forming device that is convenient for stripping, which improves the automated production efficiency of the sheet forming and stripping process by combining multiple methods such as high-frequency airflow control and adjustment, visual feedback, adaptive strategy and intelligent monitoring of air nozzles.

[0005] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0006] A plate forming device for convenient stripping includes an execution unit and a pneumatic control unit;

[0007] The execution unit includes:

[0008] A press, an upper die and a lower die are used to draw and form the plate between the upper die and the lower die through the press;

[0009] An air nozzle is provided inside the lower mold and is used to move the sheet metal along a preset trajectory by suction and blowing air, so as to facilitate demoulding of the sheet metal mold;

[0010] An air supply device, used for providing high-frequency pulse airflow;

[0011] A turning device for rotating the lower mold so that the sheet material moves toward one side of the sheet material mold under the action of airflow and gravity;

[0012] The air control unit includes:

[0013] Data acquisition module, used to collect production data in real time through sensors;

[0014] The timing control module is used to adjust the frequency of the airflow according to historical production data to adjust the airflow intensity. Within the preset operating range, the higher the airflow frequency, the greater the airflow intensity;

[0015] The visual collaboration module is used to detect the offset of the formed sheet relative to the preset reference position and feed the offset back to the timing control module in real time to dynamically adjust the airflow frequency to optimize the stripping path;

[0016] The air nozzle blockage detection module is used to monitor the injection status of the air nozzle in real time and detect whether the air nozzle is blocked.

[0017] Furthermore, the frequency of the airflow is adjusted based on historical production data, including:

[0018] Based on historical production data, abnormal trends are identified, and the airflow frequency is adjusted or a slow beat strategy is triggered before an abnormality occurs to enhance system stability and stripping success rate. Based on visual inspection results, the offset between the actual landing point of the formed sheet and the preset target area is determined, and the airflow frequency is corrected in real time to determine whether the stripping is completed within the target time window. If the stripping is not completed within the time limit, the re-blowing or protection logic is triggered.

[0019] Furthermore, based on historical production data, abnormal trends can be identified and the airflow frequency can be adjusted or a slow-beat strategy can be triggered before an abnormality occurs, including:

[0020] The Euclidean distance algorithm is used to calculate the similarity between current data and historical abnormal data to determine whether there is an abnormal trend;

[0021] When an abnormal trend is determined, the dynamic adjustment range of the airflow frequency is limited and the slow-beat production mode is triggered to suppress the potential risk of abnormal material removal;

[0022] Abnormal trends include: a downward trend in the stripping success rate, an increase in stripping delay time, an increase in the number of re-blowing times, an increase in the landing point offset, frequent airflow control frequency adjustments or boundary restrictions, stripping failures and air nozzle blockages occurring in multiple batches in a row;

[0023] The slow beat strategy includes appropriately extending the interval between mold opening and closing and slowing down the corresponding rhythm of airflow to improve the stability of the stripping action.

[0024] Furthermore, based on the visual inspection results, the offset between the actual landing point of the formed sheet and the preset target area is determined, and the airflow frequency is corrected in real time, including:

[0025] The offset is calculated in real time based on the actual position of the formed sheet relative to the preset blanking area during the stripping process. The degree of deviation of the stripping point is determined based on the offset. If the offset exceeds the set tolerance range, the airflow frequency is corrected in real time.

[0026] The airflow frequency correction is adjusted according to the frequency adjustment coefficient proportional to the offset to enhance the airflow guidance capability;

[0027] During the offset correction process, the vision module continuously provides closed-loop feedback on the correction effect until the sheet material removal point returns to the set tolerance range.

[0028] Furthermore, it is determined whether the stripping is completed within the target time window. If the stripping is not completed within the time limit, the re-blowing or protection logic is triggered, including:

[0029] Set the target stripping time window and obtain the actual stripping completion time in real time. If the stripping is not completed within the time window, it is judged as a stripping failure. When the stripping fails, the multi-level re-blowing control strategy is activated, and the airflow frequency is gradually increased according to the preset gain rules for re-blowing. After each re-blowing, the visual collaborative module judges the stripping result. If the stripping is still not successful after the set number of re-blowings, the hierarchical protection control mode is entered. According to the cumulative number of stripping failures or consecutive failed batches, the first-level warning, second-level early warning and third-level protection status are triggered;

[0030] In the first-level warning state, reduce the production rate and keep observing; in the second-level warning state, perform low-frequency airflow correction operations; in the third-level protection state, suspend the current stamping station and issue a fault prompt;

[0031] Set the self-recovery logic, and when the material is successfully stripped continuously for a set number of times, the protection level will be automatically reduced or the protection mode will be exited.

[0032] Furthermore, the air nozzle blockage detection module further includes:

[0033] The nozzle blockage detection module monitors airflow parameters, injection pressure, airflow frequency and other data in real time, sets standard thresholds, determines whether the nozzle is blocked, and sets multi-level warning thresholds. The corresponding cleaning strategy for the nozzle is implemented according to the warning thresholds.

[0034] Furthermore, multiple levels of warning thresholds are set, including:

[0035] The first-level warning threshold is lower than the standard threshold, indicating that the air nozzle is slightly blocked. The air nozzle can be restored to normal working state by increasing the air flow frequency within the air flow frequency limit.

[0036] The second-level warning threshold is lower than the first-level warning threshold, indicating that the air nozzle is moderately blocked. The air nozzle can be restored to normal working state by increasing the airflow frequency to exceed the airflow frequency limit but not exceed the set range. The third-level warning threshold is that the air nozzle is severely blocked and cannot be restored to normal working state by adjusting the airflow frequency.

[0037] Furthermore, a corresponding cleaning strategy for the gas nozzle is implemented according to the warning threshold, including:

[0038] When the air nozzle is in the state corresponding to the first-level warning threshold and the second-level warning threshold, when the sheet enters the preset target area, the blockage problem is alleviated and the impact on the sheet removal process is reduced by increasing the airflow frequency and making the air nozzle perform periodic suction and blowing. When the air nozzle is in the state corresponding to the third-level warning threshold, the sheet forming work at the current workstation is stopped, and an alarm is issued for manual intervention.

[0039] Furthermore, the flipping device includes a support platform fixedly connected to the surface of the press, and an electric telescopic cylinder is fixedly installed inside the support platform. The output shaft of the electric telescopic cylinder is hinged to the lower mold through a first through groove opened on the surface of the support platform, and the lower mold is hinged to the surface of the support platform.

[0040] Furthermore, the air nozzles are evenly distributed inside the lower mold, and the air nozzles are fixedly connected to the reserved holes opened on the surface of the lower mold, and the air vents of the air nozzles are in a grid shape.

[0041] The above solution of the present invention includes at least the following beneficial effects:

[0042] High-frequency pulse airflow and air nozzles are used for suction and blowing, so that the sheet metal moves along the preset trajectory, achieving efficient stripping and avoiding workpiece deformation and surface damage that may be caused by the traditional spring ejector pin structure.

[0043] Through the timing control module and the visual collaboration module, closed-loop feedback adjustment of the airflow frequency is achieved, and the demoulding path is optimized to achieve adaptive control, thereby improving the efficiency of automated production.

[0044] By using the Euclidean distance algorithm to identify abnormal trends and trigger the slow beat rate, potential material stripping anomalies can be prevented. The set re-blowing logic and hierarchical protection logic ensure the continuity and stability of automated production.

[0045] By monitoring the nozzle injection status in real time, blockage judgment is made according to the set threshold, and a graded cleaning strategy is adopted to improve the equipment's self-maintenance capability, thereby ensuring the stability of automated production. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the gas control unit in the present invention.

[0047] Figure 2 It is a schematic diagram of the overall structure provided by the present invention.

[0048] Figure 3 It is a schematic diagram of the installation of the telescopic cylinder of the present invention.

[0049] In the figure: 101, press; 102, upper mold; 103, lower mold; 104, support platform; 105, electric telescopic cylinder; 106, air nozzle. DETAILED DESCRIPTION

[0050] The following describes exemplary embodiments of the present disclosure in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0051] like Figures 1 to 3 As shown, an embodiment of the present invention provides a plate forming device for convenient stripping, comprising an execution unit and a pneumatic control unit;

[0052] The execution unit includes:

[0053] The press 101, the upper die 102 and the lower die 103 are used to draw the plate between the upper die 102 and the lower die 103 through the press 101;

[0054] The air nozzle 106 is arranged inside the lower mold 103 and is used to move the sheet metal along a preset trajectory by suction and blowing air to facilitate demoulding of the sheet metal mold;

[0055] An air supply device, used for providing high-frequency pulse airflow;

[0056] A turning device for rotating the lower mold 103 so that the sheet material moves toward one side of the sheet material mold under the action of airflow and gravity;

[0057] The air control unit includes:

[0058] Data acquisition module, used to collect production data in real time through sensors;

[0059] The timing control module is used to adjust the frequency of the airflow according to historical production data to adjust the airflow intensity. Within the preset operating range, the higher the airflow frequency, the greater the airflow intensity;

[0060] The visual collaboration module is used to detect the offset of the formed sheet relative to the preset reference position and feed the offset back to the timing control module in real time to dynamically adjust the airflow frequency to optimize the stripping path;

[0061] The air nozzle 106 blockage detection module is used to monitor the injection state of the air nozzle 106 in real time and detect whether the air nozzle 106 is blocked.

[0062] In the embodiment of the present invention, the press 101 is used to apply pressure during the sheet forming process, so that the sheet between the upper die 102 and the lower die 103 is drawn and formed. The air nozzle 106 is embedded in the lower die 103. The air nozzle 106 has suction and blowing functions. By controlling the switching of the air flow, the sheet is moved along a preset trajectory. The air supply device provides high-frequency pulsed airflow. These pulsed airflows are controlled by a high-pressure air source and can generate atmospheric flow fluctuations in a short period of time. Under preset working conditions, such as when the aperture and ventilation volume of the air nozzle 106 are constant, within the maximum ventilation volume limit, the frequency of the airflow is positively correlated with the intensity of the airflow.

[0063] The turning device is installed on the lower mold 103 and can rotate the lower mold 103 to move the plate to one side of the plate mold under the action of airflow and gravity;

[0064] Through the cooperation of the data acquisition module, timing control module, visual coordination module and the air nozzle 106 blockage detection module in the air control unit, the sheet material is removed according to the preset trajectory by the air flow after forming;

[0065] Based on the real-time data collected during the production process and combined with historical data, the timing control module optimizes the demoulding effect by adjusting the airflow frequency. In the event of production anomalies, the airflow frequency is adjusted to ensure that the airflow intensity meets production needs.

[0066] The visual collaboration module dynamically adjusts the airflow frequency based on the real-time position of the formed sheet and the offset between the preset blanking area. Through continuous closed-loop feedback, it optimizes the airflow path to ensure stability during the demoulding process.

[0067] Combined with the production data obtained in real time by the data acquisition module, the timing control module can adjust the airflow frequency to ensure a smooth demoulding process. If the sheet metal is offset during the demoulding process, the system will adjust the airflow frequency and nozzle working mode in real time to ensure that the sheet metal is accurately separated from the mold.

[0068] Adjust the frequency of airflow based on historical production data, including:

[0069] Based on historical production data, abnormal trends are identified, and the airflow frequency is adjusted or a slow beat strategy is triggered before an abnormality occurs to enhance system stability and stripping success rate. Based on visual inspection results, the offset between the actual landing point of the formed sheet and the preset target area is determined, and the airflow frequency is corrected in real time to determine whether the stripping is completed within the target time window. If the stripping is not completed within the time limit, the re-blowing or protection logic is triggered.

[0070] Identify abnormal trends based on historical production data and adjust airflow frequency or trigger slow-beat strategies before anomalies occur, including:

[0071] The Euclidean distance algorithm is used to calculate the similarity between current data and historical abnormal data to determine whether there is an abnormal trend;

[0072] When an abnormal trend is determined, the dynamic adjustment range of the airflow frequency is limited and the slow-beat production mode is triggered to suppress the potential risk of abnormal material removal;

[0073] Abnormal trends include: a decreasing stripping success rate, an increase in stripping delay time, an increase in the number of re-blowing times, an increase in the landing point offset, frequent airflow control frequency adjustments or boundary restrictions, stripping failures occurring in multiple batches in a row, and blockage of the air nozzle 106;

[0074] The slow beat strategy includes appropriately extending the interval between mold opening and closing and slowing down the corresponding rhythm of airflow to improve the stability of the stripping action.

[0075] Based on the visual inspection results, the offset between the actual landing point of the formed sheet and the preset target area is determined, and the airflow frequency is corrected in real time, including:

[0076] The offset is calculated in real time based on the actual position of the formed sheet relative to the preset blanking area during the stripping process. The degree of deviation of the stripping point is determined based on the offset. If the offset exceeds the set tolerance range, the airflow frequency is corrected in real time.

[0077] The airflow frequency correction is adjusted according to the frequency adjustment coefficient proportional to the offset to enhance the airflow guidance capability;

[0078] During the offset correction process, the vision module continuously provides closed-loop feedback on the correction effect until the sheet material removal point returns to the set tolerance range.

[0079] Determine whether the stripping is completed within the target time window. If the stripping is not completed within the time limit, trigger the re-blowing or protection logic, including:

[0080] Set the target stripping time window and obtain the actual stripping completion time in real time. If the stripping is not completed within the time window, it is judged as a stripping failure. When the stripping fails, the multi-level re-blowing control strategy is activated, and the airflow frequency is gradually increased according to the preset gain rules for re-blowing. After each re-blowing, the visual collaborative module judges the stripping result. If the stripping is still not successful after the set number of re-blowings, the hierarchical protection control mode is entered. According to the cumulative number of stripping failures or consecutive failed batches, the first-level warning, second-level early warning and third-level protection status are triggered;

[0081] In the first-level warning state, reduce the production rate and keep observing; in the second-level warning state, perform low-frequency airflow correction operations; in the third-level protection state, suspend the current stamping station and issue a fault prompt;

[0082] Set the self-recovery logic, and when the material is successfully stripped continuously for a set number of times, the protection level will be automatically reduced or the protection mode will be exited.

[0083] In the embodiment of the present invention, production data is first collected by a data collection module, including:

[0084] Demolding success rate: the number of successful demoulding in each production cycle;

[0085] Stripping time delay: the difference between the time required for stripping and the set time;

[0086] Re-blowing trigger times: The number of re-blowing times reflects insufficient airflow or unsmooth material removal.

[0087] Landing point offset: The offset of the sheet relative to the preset area during the demoulding process, which affects the demoulding accuracy and quality.

[0088] These production data are recorded and stored in real time through sensors. As production continues, historical data continues to accumulate a large amount of production cycle data for subsequent production analysis.

[0089] Identifying abnormal trends based on historical production data specifically includes:

[0090] First, the production mode standards are set, that is, the production data are set within a set range, including the stripping success rate being higher than the set value, the stripping time delay being within the set range, the number of re-blowing triggers being kept within the set number, and the landing point offset being within the preset tolerance range to ensure accurate demolding of the sheet. When the production data exceeds or falls below these preset standards, it is considered abnormal.

[0091] Identifying unusual trends includes:

[0092] The production data of each production cycle in the historical data is standardized, and the Euclidean distance algorithm is used to calculate the production data of each current cycle and the historical abnormal data. A Euclidean distance threshold is set. If the Euclidean distance between the data of the current cycle and the historical abnormal data exceeds this threshold, it is considered that there may be an abnormal trend in the production process of the current cycle;

[0093] If the calculated Euclidean distance value exceeds the set threshold, it means that the data of the current production cycle is similar to the historical abnormal data, and there is an abnormal trend;

[0094] If the calculated Euclidean distance value is less than the set threshold, the data of the current cycle is significantly different from the historical abnormal data, which means that there is no need to adjust the blowing frequency.

[0095] Determine the offset between the actual landing point of the formed sheet and the preset target area based on the visual inspection results, including:

[0096] The sensor of the data acquisition module collects the image data and position data of the formed sheet. A target area is preset in the mold, that is, the position where the sheet is expected to fall. The target area is usually a rectangular area or other geometric area. The processed image data and position data are compared with the preset area in the established spatial coordinate system, and the offset between the actual position and the target area is calculated.

[0097] The offset usually consists of two parts: lateral offset and longitudinal offset. The lateral offset refers to the horizontal displacement of the formed sheet relative to the preset area, and the longitudinal offset refers to the vertical displacement of the sheet relative to the preset area.

[0098] Set a tolerance range, which is the tolerance for the plate to deflect during the demoulding process. Deflection exceeding this tolerance range indicates that the demoulding process is not ideal and needs to be adjusted.

[0099] The tolerance range is set according to production requirements and molding accuracy to avoid excessive adjustments during the actual production process. The initial tolerance range can be set to 0, and the tolerance range can be gradually enlarged according to different production requirements and production accuracy.

[0100] If the offset exceeds the set tolerance range, the control system will make corresponding adjustments:

[0101] By adjusting the intensity of the airflow, the movement trajectory of the plate is changed so that the movement trajectory of the plate gradually moves towards the preset target area;

[0102] At the same time, the adjustment process is fed back to the visual collaboration module in real time to recalculate the offset. If the offset still exceeds the tolerance range, further adjustments are made until the plate falls into the preset target area.

[0103] Determine whether the stripping is completed within the target time window. If the stripping is not completed within the time limit, trigger the re-blowing or protection logic, including:

[0104] During the production process, each stripping operation has a predetermined target time window, that is, the stripping should be completed within this time range. The target time window can be dynamically adjusted according to changes in production conditions.

[0105] When the stripping operation begins, start the timer to record the stripping start time, monitor the actual situation of the stripping process through the data acquisition module and the visual collaboration module, and collect and record production data;

[0106] During the stripping process, the relationship between the current stripping time and the target time window is compared in real time. If the current stripping time exceeds the set range of the target window, it is determined that the stripping timeout has occurred.

[0107] The re-blowing logic includes: the re-blowing mode increases the intensity of the airflow by increasing the frequency of the airflow, helping the sheet to further separate from the mold. After the re-blowing operation, the visual collaboration module monitors the position of the sheet in real time, determines whether it has been demolded, and adjusts the re-blowing intensity through feedback.

[0108] The protection logic includes:

[0109] If the demoulding is still not completed after the number of re-blowing operations reaches the set number, the protection logic will be activated to prevent the demoulding failure from affecting the entire production process.

[0110] Hierarchical protection: Based on the number of stripping failures or consecutive timed-out batches, the system will trigger different levels of protection measures in sequence;

[0111] Level 1 warning: If several consecutive stripping operations time out or the re-blowing logic is triggered, the machine will enter the level 1 warning state. In this state, the production rhythm will gradually slow down to allow observation of the current operation.

[0112] Level 2 warning: If the situation does not improve, the system will trigger a level 2 warning. In this state, the airflow correction operation will be carried out and the slow beat production mode will be triggered to improve the stability of the stripping.

[0113] Level 3 protection: If the stripping operation fails continuously or a serious problem occurs (such as the movement trajectory of the plate interferes with the equipment during stripping and causes a rigid collision), the system enters the level 3 protection state. At this time, production at the current workstation will be suspended and a fault prompt will be issued to prevent further damage to the equipment or greater production losses.

[0114] Recovery logic: In the first-level warning or second-level early warning state, if the material is successfully removed multiple times in a row and the number of consecutive times exceeds the set value, the normal working state will be automatically restored.

[0115] Limiting the dynamic adjustment range of airflow frequency includes:

[0116] To prevent the airflow frequency from being too low or too high, set a minimum and maximum value for the airflow frequency according to the device's operating limits and production requirements;

[0117] Minimum value: Set the lower limit of the airflow frequency to ensure that the airflow can always meet the basic needs of the demoulding process;

[0118] Maximum value sets the upper limit of airflow frequency to avoid excessive airflow causing premature demoulding of the sheet and reduce the burden on the air supply device.

[0119] Set the upper limit of the airflow frequency adjustment range according to production requirements. For example, the range of each airflow frequency adjustment cannot exceed 10%. In order to avoid frequent frequency changes, control the compensation of each airflow frequency adjustment. For example, the step size of each airflow frequency change should not exceed 5Hz or 10Hz to ensure a smooth transition of the airflow.

[0120] The data acquisition module and the visual collaboration module monitor the changes in airflow frequency and the demoulding effect in real time. When the airflow frequency approaches the preset maximum or minimum value, the adjustment range is reduced to avoid instability caused by frequent adjustments to the airflow frequency.

[0121] Triggering slow beat strategies include:

[0122] When the airflow frequency adjustment amplitude or the adjustment frequency exceeds the set value, the slow beat production mode is triggered;

[0123] When the airflow frequency reaches the set maximum or minimum value, that is, the surface airflow intensity is close to the boundary, the slow-beat production mode is triggered.

[0124] Prolonging the mold opening and closing interval can give the airflow frequency more time to adjust and avoid rapid changes that lead to unstable airflow.

[0125] Slowing down the airflow rhythm, that is, reducing the adjustment step size, can avoid rapid changes in airflow frequency and improve the stability of the demoulding process.

[0126] The airflow frequency correction is adjusted according to the frequency adjustment coefficient proportional to the offset, including:

[0127] The adjustment amplitude of the airflow frequency is corrected by taking the ratio of the offset to the tolerance range as the correction ratio. The adjustment value of the airflow frequency is obtained by multiplying the product of the correction ratio and the maximum adjustment amplitude of the airflow frequency and adding the original value of the airflow frequency.

[0128] The increase or decrease of the airflow frequency has a direct impact on the strength of the airflow, thus affecting the movement trajectory of the plate. If the offset is large, the airflow frequency will increase significantly, thereby generating a stronger airflow to push the plate back to the target position. If the offset is small, the adjustment range of the airflow frequency will be reduced to avoid over-adjustment.

[0129] During the offset correction process, the vision module continuously provides closed-loop feedback on the correction effect until the sheet material drop point returns to the set tolerance range, including:

[0130] The visual collaboration module monitors the offset of the sheet in real time and updates the deviation between the actual position and the target position. When the offset changes, the airflow frequency correction is recalculated based on the new offset. After each adjustment, the airflow frequency is fine-tuned based on real-time feedback data to ensure continuous optimization of the demoulding path. If the adjusted airflow frequency still does not return the sheet to the target area, the airflow frequency is corrected again and the correction ratio is updated until the offset is restored to within the tolerance range.

[0131] Real-time feedback from the visual collaboration module ensures that the correction process is always in closed-loop control. After each airflow frequency adjustment, the visual module continuously tracks the sheet position and provides feedback on the current demoulding results. It continuously corrects the airflow frequency when the deviation rate exceeds the tolerance range until the sheet demoulding accuracy meets the preset standards.

[0132] When the offset of the sheet returns to the tolerance range, the system will automatically exit the airflow frequency correction mode and resume the normal demoulding process.

[0133] The gas nozzle 106 blockage detection module also includes:

[0134] The air nozzle 106 blockage detection module monitors airflow parameters, injection pressure, airflow frequency and other data in real time, sets standard thresholds, determines whether the air nozzle 106 is blocked, and sets multi-level warning thresholds, and implements corresponding cleaning strategies for the air nozzle 106 according to the warning thresholds.

[0135] A multi-level warning threshold is set, and a corresponding cleaning strategy is implemented for the gas nozzle 106 according to the warning threshold, including:

[0136] The first-level warning threshold is lower than the standard threshold, indicating that the air nozzle 106 is slightly blocked. The air nozzle 106 can be made to work normally by increasing the air flow frequency within the air flow frequency limit.

[0137] The second warning threshold is lower than the first warning threshold, indicating that the air nozzle 106 is moderately blocked. The airflow frequency can be increased to exceed the airflow frequency limit but not exceed the set range to enable the air nozzle 106 to reach a normal working state. The third warning threshold is severely blocked, and the air nozzle 106 cannot be adjusted to reach a normal working state.

[0138] When the air nozzle 106 is in the state corresponding to the first-level warning threshold and the second-level warning threshold, when the sheet enters the preset target area, the blockage problem is alleviated and the impact on the sheet removal process is reduced by increasing the airflow frequency and making the air nozzle 106 perform periodic suction and blowing. When the air nozzle 106 is in the state corresponding to the third-level warning threshold, the sheet forming work at the current workstation is stopped, and an alarm is issued for manual intervention.

[0139] In the embodiment of the present invention, the blockage detection module of the air nozzle 106 monitors the spraying state of the air nozzle 106 in real time through a sensor, and measures the pressure, flow rate and frequency of the air flow in real time;

[0140] Take the average value of the pressure and flow rate of the airflow during all normal demoulding processes within the set time scale of historical data. Set a standard threshold based on this average value and production accuracy requirements.

[0141] If a decrease in airflow pressure or flow is detected, and the magnitude of the change exceeds a standard threshold, it is determined that the air nozzle 106 is at risk of being blocked;

[0142] Multiple levels of warning thresholds are set. The standard threshold is continuous with the first, second, and third warning thresholds and does not overlap. That is, the thresholds do not intersect and are arranged in order. The standard threshold represents the normal operating range of the gas nozzle 106. As the warning threshold level increases, the blockage of the gas nozzle 106 reflected increases accordingly, which facilitates reflecting the blockage of the gas nozzle 106.

[0143] Level 1 warning threshold: When the airflow parameter flow rate is lower than the standard threshold but still within the slight range, it indicates that the air nozzle 106 is slightly blocked. At this time, the blockage problem is alleviated by increasing the airflow frequency, so that the air nozzle 106 can return to normal working state. The range of increasing the airflow frequency will be adjusted within the preset limit of the airflow frequency.

[0144] Level 2 Warning Threshold: When the airflow rate falls below the Level 1 warning threshold, it indicates moderate blockage of nozzle 106. At this point, the airflow frequency will increase beyond the normal operating range, but will remain within the system's safety range to ensure that nozzle 106 returns to normal operation. In this state, the airflow frequency will increase significantly, but will not exceed the maximum limit of the device.

[0145] Level 3 warning threshold: When the airflow parameter reaches the level 3 warning threshold, it means that the air nozzle 106 is seriously blocked and cannot be restored to normal operation by adjusting the airflow frequency. At this time, the air production needs to be stopped for manual maintenance.

[0146] When the air nozzle 106 is in the state corresponding to the first-level warning threshold and the second-level warning threshold, when the plate enters the preset target area, the airflow ejected by the air nozzle 106 no longer affects the movement of the plate. At this time, the air nozzle 106 can perform periodic suction and blowing operations. By alternating the suction and blowing actions, the blockage inside the air nozzle 106 is helped to be cleared. By alternating the suction and blowing actions, the blockage of the air nozzle 106 is disturbed at multiple angles, which is convenient for improving the clearing rate of the air nozzle 106.

[0147] When the air nozzle 106 is in the state corresponding to the third-level warning threshold, the blockage problem of the air nozzle 106 cannot be solved by adjusting the airflow frequency. At this time, the sheet metal forming work at the current workstation is stopped, and an alarm is issued, requiring manual intervention until the air nozzle 106 resumes normal operation.

[0148] The flipping device includes a support platform 104 fixedly connected to the surface of the press 101, and an electric telescopic cylinder 105 is fixedly installed inside the support platform 104. The output shaft of the electric telescopic cylinder 105 is hinged to the lower mold 103 through a first through groove opened on the surface of the support platform 104, and the lower mold 103 is hinged to the surface of the support platform 104.

[0149] The air nozzles 106 are evenly distributed inside the lower mold 103 . The air nozzles 106 are fixedly connected to the reserved holes opened on the surface of the lower mold 103 . The vents of the air nozzles 106 are in a grid shape.

[0150] In an embodiment of the present invention, the rotation action of the lower mold 103 is achieved by extending the electric telescopic cylinder 105 to drive the lower mold 103 to rotate to a set angle and then stop. During this process, the lower mold 103 rotates to a set angle around the support platform 104. When the lower mold 103 needs to be pressed together with the upper mold 102, the electric telescopic cylinder 105 can be reset. During the pressing process of the upper mold 102 and the lower mold 103, the support platform 104 bears the pressure applied by the press 101 through the upper mold 102, and the upper surface of the air nozzle 106 and the surface contact position of the lower mold 103 are smoothly connected, that is, the upper surface of the air nozzle 106 and the surface of the lower mold 103 form a complete lower mold 103, which facilitates the cooperation between the upper mold 102 and the lower mold 103 to draw the sheet into shape.

[0151] It should be noted that the working principles and usage of the press 101, the upper mold 102, the lower mold 103, the air supply device (not shown in the figure) and the air nozzle 106 are well known in the prior art and will not be described in detail here.

[0152] The sensors used by the data acquisition module and the visual collaboration module are well known in the prior art and will not be described in detail here.

[0153] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A plate forming device that is convenient for stripping, characterized in that: Including execution unit and air control unit; The execution unit includes: A press, an upper die and a lower die are used to draw and form the plate between the upper die and the lower die through the press; The air nozzle is set inside the lower mold and is used to move the sheet metal along a preset trajectory by suction and blowing air to facilitate demoulding of the sheet metal mold; An air supply device, used for providing high-frequency pulse airflow; A turning device for rotating the lower mold so that the sheet material moves toward one side of the sheet material mold under the action of airflow and gravity; The air control unit includes: Data acquisition module, used to collect production data in real time through sensors; The timing control module is used to adjust the frequency of the airflow according to historical production data to adjust the airflow intensity. Within the preset operating range, the higher the airflow frequency, the greater the airflow intensity; The visual collaboration module is used to detect the offset of the formed sheet relative to the preset reference position and feed the offset back to the timing control module in real time to dynamically adjust the airflow frequency to optimize the stripping path; The nozzle blockage detection module is used to monitor the injection status of the nozzle in real time and detect whether the nozzle is blocked; Adjust the frequency of airflow based on historical production data, including: Based on historical production data, it identifies abnormal trends and adjusts the airflow frequency or triggers a slow-beat strategy before an abnormality occurs to enhance system stability and stripping success rate. Based on visual inspection results, it determines the offset between the actual landing point of the formed sheet and the preset target area, and corrects the airflow frequency in real time to determine whether stripping is completed within the target time window. If stripping is not completed within the time limit, re-blowing or protection logic is triggered. Identify abnormal trends based on historical production data and adjust airflow frequency or trigger slow-beat strategies before anomalies occur, including: The Euclidean distance algorithm is used to calculate the similarity between current data and historical abnormal data to determine whether there is an abnormal trend; When an abnormal trend is determined, the dynamic adjustment range of the airflow frequency is limited and the slow-beat production mode is triggered to suppress the potential risk of abnormal material removal; Abnormal trends include: a downward trend in the stripping success rate, an increase in stripping delay time, an increase in the number of re-blowing times, an increase in the landing point offset, frequent airflow control frequency adjustments or boundary restrictions, stripping failures and air nozzle blockages occurring in multiple batches in a row; The slow beat strategy includes appropriately extending the mold opening and closing interval time and slowing down the corresponding rhythm of air flow to improve the stability of the stripping action; Based on the visual inspection results, the offset between the actual landing point of the formed sheet and the preset target area is determined, and the airflow frequency is corrected in real time, including: The offset is calculated in real time based on the actual position of the formed sheet relative to the preset blanking area during the stripping process. The degree of deviation of the stripping point is determined based on the offset. If the offset exceeds the set tolerance range, the airflow frequency is corrected in real time. The airflow frequency correction is adjusted according to the frequency adjustment coefficient proportional to the offset to enhance the airflow guidance capability; During the offset correction process, the vision module continuously provides closed-loop feedback on the correction effect until the sheet material drop point returns to the set tolerance range; Determine whether the stripping is completed within the target time window. If the stripping is not completed within the time limit, trigger the re-blowing or protection logic, including: Set the target stripping time window and obtain the actual stripping completion time in real time. If the stripping is not completed within the time window, it is judged as a stripping failure. When the stripping fails, the multi-level re-blowing control strategy is activated, and the airflow frequency is gradually increased according to the preset gain rules for re-blowing. After each re-blowing, the visual collaborative module judges the stripping result. If the stripping is still not successful after the set number of re-blowings, the hierarchical protection control mode is entered. According to the cumulative number of stripping failures or consecutive failed batches, the first-level warning, second-level early warning and third-level protection status are triggered; In the first-level warning state, reduce the production rate and keep observing; in the second-level warning state, perform low-frequency airflow correction operations; in the third-level protection state, suspend the current stamping station and issue a fault prompt; Set the self-recovery logic, and when the stripping is successful for a set number of times, the protection level will be automatically lowered or the protection mode will be exited; The valve blockage detection module also includes: The nozzle blockage detection module monitors the airflow parameters, injection pressure and airflow frequency data in real time, sets standard thresholds, determines whether the nozzle is blocked, and sets multi-level warning thresholds. The corresponding cleaning strategy for the nozzle is implemented according to the warning thresholds.

2. The plate forming device for convenient stripping according to claim 1, characterized in that: Set multi-level warning thresholds, including: The first-level warning threshold is lower than the standard threshold, indicating that the air nozzle is slightly blocked. The air nozzle can be restored to normal working state by increasing the air flow frequency within the air flow frequency limit. The second-level warning threshold is lower than the first-level warning threshold, indicating that the air nozzle is moderately blocked. The air nozzle can be restored to normal working state by increasing the airflow frequency to exceed the airflow frequency limit but not exceed the set range. The third-level warning threshold is that the air nozzle is severely blocked and cannot be restored to normal working state by adjusting the airflow frequency.

3. The plate forming device for convenient stripping according to claim 2, characterized in that: The corresponding cleaning strategy for the gas nozzle is implemented according to the warning threshold, including: When the air nozzle is in the state corresponding to the first-level warning threshold and the second-level warning threshold, when the sheet enters the preset target area, the blockage problem is alleviated and the impact on the sheet removal process is reduced by increasing the airflow frequency and making the air nozzle perform periodic suction and blowing. When the air nozzle is in the state corresponding to the third-level warning threshold, the sheet forming work at the current workstation is stopped, and an alarm is issued for manual intervention.

4. The plate forming device for convenient stripping according to claim 1, characterized in that: The flipping device includes a support platform fixedly connected to the surface of the press, and an electric telescopic cylinder is fixedly installed inside the support platform. The output shaft of the electric telescopic cylinder is hinged to the lower mold through a first through groove opened on the surface of the support platform, and the lower mold is hinged to the surface of the support platform.

5. The plate forming device for convenient stripping according to claim 1, characterized in that: The air nozzles are evenly distributed inside the lower mold, and are fixedly connected to the reserved holes opened on the surface of the lower mold. The air vents of the air nozzles are in a grid shape.

Images