Plate forming device facilitating stripping

Abstract

The invention provides a plate forming device facilitating stripping, and relates to the field of automobile part machining, the plate forming device comprises a press machine, an upper mold, a lower mold, an air nozzle, an air supply device, a turnover device and a data acquisition module, and the data acquisition module is used for acquiring production data in real time through a sensor; the sequential control module is used for adjusting the airflow frequency according to the historical production data so as to adjust the airflow intensity, and in the preset working condition range, the higher the airflow frequency is, the higher the airflow intensity is; the visual collaboration module is used for dynamically adjusting the airflow frequency by detecting the offset of the position of the formed plate relative to a preset reference position and feeding back the offset to the time sequence control module in real time so as to optimize a stripping path; and the air tap blockage detection module is used for monitoring the injection state of the air tap in real time and detecting whether the air tap is blocked, and through high-frequency airflow control and adjustment, visual feedback, a self-adaptive strategy and intelligent monitoring of the air tap, the automatic production efficiency of the plate forming and stripping process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive component processing, and particularly to a sheet metal forming device that facilitates material removal. Background Art

[0002] Sheet metal forming devices are widely used in industries such as automotive manufacturing, household appliances, and electronic products. Particularly in automotive body manufacturing, sheet metal stamping processes are widely adopted.

[0003] Related sheet metal forming devices often use traditional demolding structures such as springs and ejector pins. When dealing with complex-shaped or large-sized workpieces, it is easy to cause workpiece deformation, scratching, or surface damage, and it is prone to unstable demolding. Especially in the process of high-speed and large-volume production, these problems will further affect the demolding efficiency and quality. At the same time, after the formed sheet metal is ejected from the mold by the spring pin, it is also necessary to cooperate with a material taking mechanism such as a robotic arm to completely remove the formed sheet metal from the mold for the next cycle of sheet metal forming. This process requires waiting for the in and out actions of the material taking mechanism such as the robotic arm, 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 metal forming device that facilitates material removal, which combines various methods such as high-frequency air flow control and regulation, visual feedback, adaptive strategies, and intelligent monitoring of air nozzles to improve the automated production efficiency of the sheet metal forming and material removal process.

[0005] To solve the above technical problems, the technical solution of the present invention is as follows: issue an alarm to enable manual intervention for processing.

[0006] A sheet metal forming device that facilitates material removal, comprising an execution unit and a pneumatic control unit; The execution unit includes: A press, an upper mold, and a lower mold, used to draw and form the sheet metal between the upper mold and the lower mold through the press; An air nozzle, which is arranged inside the lower mold and is used to move the sheet metal along a preset trajectory by suction and blowing to facilitate the demolding of the sheet metal mold; An air supply device, used to provide high-frequency pulsed air flow; A flipping device, used to rotate the lower mold to facilitate the movement of the sheet metal towards one side of the sheet metal mold under the action of air flow and gravity; The pneumatic control unit includes: A data acquisition module, used to collect production data in real time through sensors; A timing control module, used to adjust the frequency of the air flow according to historical production data to adjust the air flow intensity. Within the preset working conditions, the higher the air flow frequency, the greater the air flow intensity; The visual collaboration module is used to detect the offset of the formed sheet position relative to the preset reference position, and feedback the offset to the timing control module in real time to dynamically adjust the air flow frequency to optimize the blanking path; The nozzle blockage detection module is used to monitor the injection state of the nozzle in real time and detect whether the nozzle is blocked.

[0007] Furthermore, the air flow frequency is adjusted according to historical production data, including: Identifying abnormal trends based on historical production data, adjusting the air flow frequency or triggering a slow beat strategy before an abnormality occurs to enhance system stability and blanking success rate, judging the offset between the actual landing point of the formed sheet and the preset target area based on the visual detection result, and correcting the air flow frequency in real time, judging whether the blanking is completed within the target time window, and if the blanking times out, triggering the supplementary blowing or protection logic.

[0008] Furthermore, identifying abnormal trends based on historical production data, adjusting the air flow frequency or triggering a slow beat strategy before an abnormality occurs, including: Calculating the similarity between the current data and historical abnormal data through the Euclidean distance algorithm to judge whether there is an abnormal trend; When it is determined that there is an abnormal trend, restricting the dynamic adjustment range of the air flow frequency and triggering the slow beat production mode to suppress the potential risk of blanking abnormalities; Abnormal trends include: the downward trend of blanking success rate, the increase of blanking delay time, the increase of supplementary blowing times, the increase of landing point offset, the frequent adjustment or boundary limitation of the air flow control frequency, the occurrence of blanking failures and nozzle blockages in multiple consecutive batches; The slow beat strategy includes appropriately extending the mold opening and closing interval time and slowing down the air flow response rhythm to improve the stability of the blanking action.

[0009] Furthermore, judging the offset between the actual landing point of the formed sheet and the preset target area based on the visual detection result, and correcting the air flow frequency in real time, including: Calculating the offset in real time according to the actual position of the formed sheet relative to the preset blanking area during the blanking process, judging the degree of deviation of the blanking landing point according to the offset, and if the offset exceeds the set tolerance range, performing real-time correction of the air flow frequency; The air flow frequency correction is adjusted according to the frequency adjustment coefficient proportional to the offset to enhance the air flow guiding ability; During the offset correction process, the visual module continuously provides closed-loop feedback on the correction effect until the blanking landing point of the sheet returns to the set tolerance interval.

[0010] Furthermore, judging whether the blanking is completed within the target time window, and if the blanking times out, triggering the supplementary blowing or protection logic, including: Set a target blanking time window and obtain the actual blanking completion time in real time. If the blanking is not completed within the time window, it is determined that the blanking fails. When the blanking fails, start a multi-level supplementary blowing control strategy, and gradually increase the air flow frequency according to a preset gain rule for supplementary blowing. After each supplementary blowing, the vision cooperation module judges the blanking result. If the blanking is still not successful after performing the set number of supplementary blowing operations, enter the hierarchical protection control mode, and trigger a first-level warning, a second-level early warning, and a third-level protection status according to the cumulative number of blanking failures or the continuous failure batches; In the first-level warning state, reduce the production beat and keep observing; in the second-level early warning state, perform a low-frequency air flow correction operation; in the third-level protection state, suspend the current stamping station and issue a fault prompt; Set a self-recovery logic. When the blanking is continuously successful for a set number of times, automatically reduce the protection level or exit the protection mode.

[0011] Furthermore, the nozzle clogging detection module further includes: The nozzle clogging detection module sets standard thresholds by monitoring data such as air flow parameters, injection pressure, and air flow frequency in real time to judge whether the nozzle is clogged, and sets multi-level warning thresholds, and performs corresponding cleaning strategies on the nozzle according to the warning thresholds.

[0012] Furthermore, setting multi-level warning thresholds includes: The first-level warning threshold, the first-level warning threshold is lower than the standard threshold, indicating that the nozzle is slightly clogged, and the nozzle can reach the normal working state by increasing the air flow frequency within the air flow frequency limit; The second-level warning threshold, the second-level warning threshold is lower than the first-level warning threshold, indicating that the nozzle is moderately clogged, and the nozzle can reach the normal working state by increasing the air flow frequency to exceed the air flow frequency limit but not exceed the set range. The third-level warning threshold indicates that the nozzle is severely clogged and cannot reach the normal working state by adjusting the air flow frequency.

[0013] Furthermore, performing corresponding cleaning strategies on the nozzle according to the warning thresholds includes: When the nozzle is in the states corresponding to the first-level warning threshold and the second-level warning threshold, when the sheet enters the preset target area, relieve the clogging problem by increasing the air flow frequency and making the nozzle perform periodic suction and blowing, and reduce the impact on the sheet blanking process. When the nozzle is in the state corresponding to the third-level warning threshold, stop the sheet forming work at the current station and issue an alarm to enable manual intervention for processing.

[0014] Further, the flipping device includes a support platform fixedly connected to the surface of the press. 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.

[0015] Further, the air nozzles are evenly distributed inside the lower mold. The air nozzles are fixedly connected in reserved holes opened on the surface of the lower mold, and the air vents of the air nozzles are grid-shaped.

[0016] The above solution of the present invention has at least the following beneficial effects: By using high-frequency pulsed air flow and air nozzles for suction and blowing, the sheet is moved along a preset trajectory to achieve efficient material removal, avoiding workpiece deformation and surface damage that may be caused by the traditional spring push pin structure; Through the timing control module and the vision cooperation module, closed-loop feedback regulation of the air flow frequency is achieved, optimizing the demolding path to achieve adaptive control, which is beneficial to improving the automation production efficiency; By using the Euclidean distance algorithm to identify abnormal trends and trigger the slow beat rate, potential material removal abnormalities can be prevented. Through the set supplementary blowing logic and hierarchical protection logic, the continuity and stability of automated production are ensured; By real-time monitoring the injection state of the air nozzles, judging blockage according to the set threshold, and adopting a hierarchical cleaning strategy, the self-maintenance ability of the equipment is improved, and thus the stability of automated production is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the pneumatic control unit in the present invention.

[0018] Figure 2 is a schematic diagram of the overall structure provided by the present invention.

[0019] Figure 3 is a schematic diagram of the installation of the moving telescopic cylinder in the present invention.

[0020] In the figure: 101, press; 102, upper mold; 103, lower mold; 104, support platform; 105, electric telescopic cylinder; 106, air nozzle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the 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. On the contrary, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0022] AsFigures 1 to 3 As shown in the figure, an embodiment of the present invention provides a sheet metal forming device for convenient material removal, including an execution unit and a pneumatic control unit; The execution unit includes: A press 101, an upper die 102 and a lower die 103, which are used to draw and form the sheet metal between the upper die 102 and the lower die 103 through the press 101; An air nozzle 106, which is arranged inside the lower die 103 and is used to move the sheet metal along a preset trajectory by means of suction and blowing, so as to facilitate the demoulding of the sheet metal die; An air supply device, which is used to provide high-frequency pulsed air flow; A flipping device, which is used to rotate the lower die 103, so as to facilitate the movement of the sheet metal towards one side of the sheet metal die under the action of air flow and gravity; The pneumatic control unit includes: A data acquisition module, which is used to collect production data in real time through sensors; A timing control module, which is used to adjust the frequency of the air flow according to historical production data to adjust the air flow intensity. Within a preset working condition range, the higher the air flow frequency, the greater the air flow intensity; A vision cooperation module, which is used to detect the offset of the formed sheet metal position relative to the preset reference position and feedback the offset to the timing control module in real time to dynamically adjust the air flow frequency to optimize the material removal path; An air nozzle 106 blockage detection module, which is used to monitor the spraying state of the air nozzle 106 in real time and detect whether the air nozzle 106 is blocked.

[0023] In the embodiment of the present invention, the press 101 is used to apply pressure during the sheet metal forming process to draw and form the sheet metal between the upper die 102 and the lower die 103. The air nozzle 106 is embedded and installed inside the lower die 103. The air nozzle 106 has the functions of suction and blowing. By controlling the switching of the air flow, the sheet metal is moved along a preset trajectory. The air supply device provides high-frequency pulsed air flow. These pulsed air flows are controlled by a high-pressure air source and can generate a large air flow fluctuation within a short time. Within a preset working condition, such as when the aperture and air ventilation volume of the air nozzle 106 are certain, within the maximum air ventilation volume limit, the air flow frequency is positively correlated with the air flow intensity; The flipping device is installed on the lower die 103 and can rotate the lower die 103 to move the sheet metal towards one side of the sheet metal die under the action of air flow and gravity; Through the cooperation of the data acquisition module, timing control module, vision cooperation module and air nozzle 106 blockage detection module in the pneumatic control unit, after the sheet metal is formed, it is removed from the mold along a preset trajectory under the action of air flow; Based on the data collected in real time during the production process and combined with historical data, the timing control module optimizes the demolding effect by adjusting the air flow frequency. When production anomalies occur, the air flow frequency is adjusted to ensure that the intensity of the air flow meets the production requirements; The vision cooperation module dynamically adjusts the air flow frequency according to the offset between the real-time position of the formed sheet and the preset blanking area, optimizes the air flow path through continuous closed-loop feedback, and ensures the stability during the demolding process; Combined with the production data obtained in real time by the data acquisition module, the timing control module can adjust the air flow frequency to ensure the smooth progress of the demolding process. If the sheet deviates during the demolding process, the system will adjust the air flow frequency and the nozzle working mode in real time to ensure that the sheet accurately separates from the mold.

[0024] Adjust the frequency of the air flow according to historical production data, including: Identify abnormal trends based on historical production data, adjust the air flow frequency or trigger a slow-beat strategy before anomalies occur to enhance system stability and the success rate of material removal. Judge the offset between the actual landing point of the formed sheet and the preset target area based on the vision detection results, and correct the air flow frequency in real time. Judge whether the material removal is completed within the target time window. If the material is not removed after the timeout, trigger the supplementary blowing or protection logic.

[0025] Identify abnormal trends based on historical production data, adjust the air flow frequency or trigger a slow-beat strategy before anomalies occur, including: Calculate the similarity between the current data and historical abnormal data through the Euclidean distance algorithm to judge whether there is an abnormal trend; When it is determined that there is an abnormal trend, limit the dynamic adjustment range of the air flow frequency and trigger the slow-beat production mode to suppress the potential risk of abnormal material removal; Abnormal trends include: a downward trend in the success rate of material removal, an increase in the material removal delay time, an increase in the number of supplementary blowing times, an increase in the landing point offset, frequent adjustment or boundary limitation of the air flow control frequency, consecutive batches of material removal failures, and blockage of the air nozzle 106; The slow-beat strategy includes appropriately extending the mold opening and closing interval time and slowing down the air flow response rhythm to improve the stability of the material removal action.

[0026] Judge the offset between the actual landing point of the formed sheet and the preset target area based on the vision detection results, and correct the air flow frequency in real time, including: Calculate the offset in real time according to the actual position of the formed sheet relative to the preset blanking area during the demolding process. Judge the deviation degree of the material removal landing point according to the offset. If the offset exceeds the set tolerance range, perform real-time correction of the air flow frequency; The correction of the air flow frequency is adjusted according to the frequency adjustment coefficient proportional to the offset to enhance the air flow guiding ability; During the offset correction process, the vision module continuously provides closed-loop feedback to correct the effect until the blanking landing point of the sheet returns to the set tolerance range.

[0027] Determine whether blanking is completed within the target time window. If blanking times out, trigger the supplementary blowing or protection logic, including: Set the target blanking time window and obtain the actual completion time of blanking in real time. If blanking is not completed within the time window, it is determined that blanking fails. When blanking fails, start the multi-level supplementary blowing control strategy, and gradually increase the air flow frequency according to the preset gain rule for supplementary blowing. After each supplementary blowing, the vision cooperation module determines the blanking result. If blanking is still not successful after performing the set number of supplementary blowings, enter the hierarchical protection control mode, and trigger the first-level warning, second-level early warning, and third-level protection status according to the cumulative number of blanking failures or consecutive failure batches; In the first-level warning state, reduce the production rhythm and keep observing; in the second-level early warning state, perform low-frequency air flow correction operations; in the third-level protection state, suspend the current stamping station and issue a fault prompt; Set the self-recovery logic. When the blanking is continuously successful for the set number of times, automatically reduce the protection level or exit the protection mode.

[0028] In the embodiment of the present invention, production data is first collected by the data acquisition module, including: Blanking success rate: the number of successful demouldings in each production cycle; Blanking time delay: the difference between the time required for blanking and the set time; Supplementary blowing trigger times: the number of supplementary blowings, reflecting the situation of insufficient air flow or unsmooth blanking: Landing point offset: the offset of the sheet during the demoulding process relative to the preset area, which affects the demoulding accuracy and quality.

[0029] These production data are recorded and stored in real time by sensors. As production continues, historical data accumulates a large amount of data for multiple production cycles, which is used for the analysis of subsequent production.

[0030] Identifying abnormal trends based on historical production data specifically includes: First, set the production mode standard, that is, the production data are all set with a set range, including that the blanking success rate is higher than the set value, the blanking time delay is within the set range, the supplementary blowing trigger times are kept within the set number, and the landing point offset is within the preset tolerance range to ensure accurate demoulding of the sheet. When the production data exceeds or is lower than these preset standards, it is regarded as abnormal.

[0031] Identifying abnormal trends includes: Standardize the production data of each production cycle in the historical data, calculate the production data of each current cycle and the historical abnormal data using the Euclidean distance algorithm, set the Euclidean distance threshold. 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; 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, then there is an abnormal trend; If the calculated Euclidean distance value is less than the set threshold, the data of the current cycle is quite different from the historical abnormal data, that is, it means that the blowing frequency does not need to be adjusted.

[0032] Based on the visual detection results, judge the offset between the actual landing point of the formed sheet and the preset target area, including: Collect the image data and position data of the formed sheet through the sensors of the data acquisition module, preset the target area in the mold, that is, the position where the sheet is expected to fall. The target area is usually a rectangular or other geometric-shaped area. Compare the processed image data and position data with the preset area in the established space coordinate system, and calculate the offset between the actual position and the target area; The offset usually consists of two parts: horizontal offset and vertical offset. The horizontal offset refers to the displacement of the formed sheet in the horizontal direction relative to the preset area, and the vertical offset refers to the displacement of the sheet in the vertical direction relative to the preset area; Set a tolerance range, which is the offset that the sheet can tolerate during the demolding process. An offset exceeding this tolerance range indicates that the demolding process is not ideal and needs to be adjusted; The tolerance range is set according to the production requirements and the forming accuracy to avoid excessive adjustments during the actual production process. The specific initial tolerance range can be set to 0, and the tolerance range is gradually enlarged according to different production requirements and production accuracies; If the offset exceeds the set tolerance range, the control system will make corresponding adjustments: Change the movement trajectory of the sheet by adjusting the intensity of the airflow, so that the movement trajectory of the sheet gradually tends to the preset target area; At the same time, the adjustment process is fed back to the visual cooperation module in real time, and the offset is recalculated. If the offset still exceeds the tolerance range, further adjustments are made until the sheet falls into the preset target area.

[0033] Judge whether the stripping is completed within the target time window. If the stripping is not completed after the time limit, trigger the supplementary blowing or protection logic, including: During the production process, each stripping operation has a predetermined target time window, that is, the stripping should be completed within this time range. According to the changes in the production situation, the target time window can be dynamically adjusted; At the start of the stripping operation, start the timer to record the stripping start time. Monitor the actual situation during the stripping process through the data acquisition module and the vision cooperation module, and collect and record the production data. During the stripping process, compare the current stripping time with the target time window in real time. If the current stripping time exceeds the set range of the target window, it is determined that the stripping is overtime. The supplementary blowing logic includes: the supplementary blowing mode increases the intensity of the air flow by increasing the air flow frequency to help the sheet further separate from the mold. After the supplementary blowing operation, the vision cooperation module monitors the position of the sheet in real time, determines whether it has been demolded, and adjusts the supplementary blowing intensity through feedback.

[0034] The protection logic includes: If the stripping is still not completed after the number of supplementary blowing operations reaches the set number, start the protection logic to prevent the failure of demolding from affecting the entire production process.

[0035] Hierarchical protection: According to the number of stripping failures or consecutive overtime batches, the system will trigger different levels of protection measures in sequence; First-level warning: If several consecutive stripping operations are overtime, or the supplementary blowing logic is triggered, enter the first-level warning state. In this state, the production beat gradually slows down for observing the current operation; Second-level early warning: If the situation does not improve, the system will trigger the second-level early warning. In this state, perform the air flow correction operation and trigger the slow beat production mode to improve the stability of stripping; Third-level protection: If the stripping operation fails continuously or a serious problem occurs (such as the movement trajectory of the sheet interferes with the equipment during stripping and causes a rigid collision), enter the third-level protection state. At this time, the production of the current station will be suspended and a fault prompt will be issued to prevent further damage to the equipment or greater production losses.

[0036] Recovery logic: In the first-level warning or second-level early warning state, if the stripping is successfully completed continuously for multiple times and the continuous number exceeds the set value, automatically return to the normal working state.

[0037] The dynamic adjustment range of the restricted air flow frequency includes: To prevent the air flow frequency from being too low or too high, set a minimum value and a maximum value of the air flow frequency according to the working limit of the device and the production requirements; Minimum value: Set the lower limit of the air flow frequency to ensure that the air flow can always meet the basic requirements during the demolding process; Maximum value: Set the upper limit of the air flow frequency to avoid premature demolding of the sheet due to too strong air flow and reduce the burden on the air supply device.

[0038] Set the upper limit of the adjustment range of the air flow frequency according to production requirements. For example, the adjustment range of the air flow frequency each time shall not exceed 10%. To avoid frequent frequency changes, control the compensation for each adjustment of the air flow frequency. For example, the step size of each change in the air flow frequency shall not exceed 5 Hz or 10 Hz to ensure a smooth transition of the air flow. Through the data acquisition module and the vision cooperation module, monitor the changes in the air flow frequency and the demolding effect in real time. When the air flow frequency approaches the preset maximum or minimum value, reduce the adjustment range to avoid instability caused by frequent adjustment of the air flow frequency.

[0039] The trigger for the slow beat strategy includes: When the adjustment range or adjustment frequency of the air flow frequency exceeds the set value, trigger the slow beat production mode. When the air flow frequency reaches the set maximum or minimum value, that is, when the surface air flow intensity approaches the boundary, trigger the slow beat production mode.

[0040] Extend the mold opening and closing interval time, which can give more time for the adjustment of the air flow frequency and avoid instability caused by rapid changes. Slow down the air flow rhythm, that is, reduce the adjustment step size, which can avoid rapid changes in the air flow frequency and improve the stability of the demolding process.

[0041] The adjustment of the air flow frequency correction is carried out according to the frequency adjustment coefficient proportional to the offset, including: Take the ratio of the offset to the tolerance range as the correction ratio to correct the adjustment range of the air flow frequency. The adjustment value of the air flow frequency is obtained by multiplying the correction ratio by the maximum adjustment range of the air flow frequency and then adding the original value of the air flow frequency. The increase or decrease of the air flow frequency has a direct impact on the intensity of the air flow, thus affecting the movement trajectory of the sheet. If the offset is large, the air flow frequency will increase significantly, generating a stronger air flow to push the sheet back to the target position. If the offset is small, the adjustment range of the air flow frequency will be reduced to avoid over-adjustment. During the offset correction process, the vision module continuously provides closed-loop feedback on the correction effect until the demolding landing point of the sheet returns to the set tolerance range, including: The vision cooperation module monitors the offset of the sheet in real time, updates the deviation between the actual position and the target position. When the offset changes, recalculate the correction amount of the air flow frequency according to the new offset. After each adjustment of the air flow frequency, fine-tune the air flow frequency according to the real-time feedback data to ensure continuous optimization of the demolding path. For example, if the adjusted air flow frequency still does not make the sheet return to the target area, correct the air flow frequency again and update the correction ratio until the offset is restored within the tolerance range. The real-time feedback of the visual collaboration module ensures that the correction process is always in closed-loop control. After each adjustment of the air flow frequency, the visual module continuously tracks the position of the sheet and feeds back the current demolding result, constantly correcting the air flow frequency when the deviation rate exceeds the tolerance range until the demolding accuracy of the sheet meets the preset standard; When the offset of the sheet returns within the tolerance range, the system will automatically exit the air flow frequency correction mode and resume the normal demolding process.

[0042] The nozzle 106 blockage detection module further includes: The nozzle 106 blockage detection module determines whether the nozzle 106 is blocked by setting standard thresholds by real-time monitoring of data such as air flow parameters, injection pressure, and air flow frequency, and sets multi-level warning thresholds, and performs corresponding cleaning strategies on the nozzle 106 according to the warning thresholds.

[0043] Set multi-level warning thresholds, and perform corresponding cleaning strategies on the nozzle 106 according to the warning thresholds, including: The first-level warning threshold, the first-level warning threshold is lower than the standard threshold, indicating that the nozzle 106 is slightly blocked, and the nozzle 106 can reach the normal working state by increasing the air flow frequency within the air flow frequency limit; The second-level warning threshold, the second-level warning threshold is lower than the first-level warning threshold, indicating that the nozzle 106 is moderately blocked, and the nozzle 106 can reach the normal working state by increasing the air flow frequency to exceed the air flow frequency limit but not exceed the set range. The third-level warning threshold, the nozzle 106 is severely blocked and cannot reach the normal working state by adjusting the air flow frequency; When the nozzle 106 is in the states corresponding to the first-level warning threshold and the second-level warning threshold, when the sheet enters the preset target area, by increasing the air flow frequency and making the nozzle 106 perform periodic suction and blowing to relieve the blockage problem and reduce the impact on the sheet demolding process. When the nozzle 106 is in the state corresponding to the third-level warning threshold, stop the sheet forming work at the current station and issue an alarm to allow manual intervention.

[0044] In the embodiment of the present invention, the nozzle 106 blockage detection module uses a sensor to continuously monitor the injection state of the nozzle 106, and measures the pressure, flow rate, and air flow frequency of the air flow in real time; Take the average values of the pressure and flow rate of the air flow during all normal demolding processes in the historical data of the set time scale, and set a standard threshold according to this average value and the production accuracy requirements; If it is detected that the air flow pressure or flow rate decreases and the change range exceeds the standard threshold, it is determined that there is a risk of blockage of the nozzle 106; Set multi-level warning thresholds. The standard threshold is continuous and non-overlapping with the first-level warning threshold, the second-level warning threshold, and the third-level warning threshold, that is, there is no intersection between the thresholds and they are arranged in order. Among them, the standard threshold represents the normal working range of the air nozzle 106. As the level of the warning threshold increases, the degree of blockage of the air nozzle 106 reflected increases, which is convenient for reflecting the blockage situation of the air nozzle 106. First-level warning threshold: When the air flow parameter flow rate is lower than the standard threshold but still within a slight range, it indicates that the air nozzle 106 is slightly blocked. At this time, the blockage problem is alleviated by increasing the air flow frequency, so that the air nozzle 106 returns to the normal working state. The range of increasing the air flow frequency will be adjusted within the preset limit of the air flow frequency.

[0045] Second-level warning threshold: When the air flow rate is lower than the first-level warning threshold, it indicates that the air nozzle 106 is moderately blocked. At this time, the air flow frequency will be increased to exceed the normal working range, but still remain within the safety range set by the system to ensure that the air nozzle 106 returns to the normal working state. In this state, the increase range of the air flow frequency is relatively large, but it will not exceed the maximum limit of the equipment.

[0046] Third-level warning threshold: When the air flow parameter reaches the third-level warning threshold, it indicates that the air nozzle 106 is severely blocked and cannot return to the normal working state by adjusting the air flow frequency. At this time, production needs to be stopped for manual maintenance.

[0047] When the air nozzle 106 is in the states corresponding to the first-level warning threshold and the second-level warning threshold, when the sheet enters the preset target area, the air flow ejected by the air nozzle 106 no longer affects the movement of the sheet. At this time, the air nozzle 106 can perform periodic suction and blowing operations. By alternately performing suction and blowing actions, it helps to remove the blockage inside the air nozzle 106. Through the alternating suction and blowing actions, the blockage in the air nozzle 106 is disturbed from multiple angles, which is convenient for improving the dredging rate of the air nozzle 106. 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 air flow frequency. At this time, the sheet forming work at the current station is stopped and an alarm is issued to make manual intervention until the air nozzle 106 returns to the normal working state.

[0048] The flipping device includes a support platform 104 fixedly connected to the surface of the press 101. 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.

[0049] The air nozzles 106 are evenly distributed inside the lower mold 103. The air nozzles 106 are fixedly connected in the reserved holes formed on the surface of the lower mold 103, and the air vents of the air nozzles 106 are in a grid shape.

[0050] In the embodiment of the present invention, the rotation 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 around the support platform 104 to the set angle. When the lower mold 103 needs to be pressed against the upper mold 102, the electric telescopic cylinder 105 is 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. The contact position between the upper surface of the air nozzle 106 and the surface of the lower mold 103 is 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, so as to facilitate the cooperation between the upper mold 102 and the lower mold 103 to draw and form the sheet material.

[0051] It should be noted that the working principles and usage methods of the press 101, the upper mold 102, the lower mold 103, the air supply device (not shown in the figure) and the air nozzles 106 are well known in the prior art and will not be described in detail herein. The sensors used in the data acquisition module and the vision cooperation module are well known in the prior art and will not be described herein.

[0052] The above is the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A sheet forming device for convenient stripping, characterized in that: Including an execution unit and a gas control unit; The execution units include: 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 arranged inside the lower mold and is used to move the sheet metal along a preset trajectory by suction and blowing, so as to facilitate demoulding of the sheet metal mold; An air supply device, used for providing a 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 gas 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 the historical production data to adjust the airflow intensity. Within the preset working condition 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 position 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 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.

2. The sheet forming device for convenient stripping according to claim 1 is characterized in that: The frequency of airflow is adjusted based on historical production data, including: Based on the historical production data, the abnormal trend is identified, and the airflow frequency is adjusted or the slow beat strategy is triggered before the abnormality occurs to enhance the system stability and the success rate of stripping. Based on the visual inspection results, the offset between the actual landing point of the formed sheet and the preset target area is judged, 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.

3. The sheet forming device for convenient stripping according to claim 2 is characterized in that: Identify abnormal trends based on historical production data, adjust airflow frequency or trigger slow beat strategies before abnormalities 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 stripping; Abnormal trends include: a downward trend in the stripping success rate, an increase in the stripping delay time, an increase in the number of re-blowing times, an increase in the drop point offset, frequent adjustments to the airflow control frequency or limited boundaries, stripping failures and nozzle blockages in multiple batches in a row; 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.

4. The sheet forming device for convenient stripping according to claim 2 is characterized in that: 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: According to the actual position of the formed sheet relative to the preset blanking area during the stripping process, the offset is calculated in real time, and the degree of deviation of the stripping point is determined according to 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 factor 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 removal point returns to the set tolerance range.

5. The sheet forming device for convenient stripping according to claim 2, characterized in that: 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, start the multi-level re-blowing control strategy, and increase the airflow frequency step by step according to the preset gain rules for re-blowing. After each re-blowing, the visual collaborative module determines the stripping result. If the stripping is still not successful after the set number of re-blowing, enter the hierarchical protection control mode, and trigger the first-level warning, second-level warning and third-level protection status according to the cumulative number of stripping failures or consecutive failed batches; In the first-level warning state, reduce the production rhythm 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. When the material stripping is successful for the set number of times, the protection level will be automatically reduced or the protection mode will be exited.

6. The sheet forming device for convenient stripping according to claim 1, characterized in that: The nozzle blockage detection module also includes: The air nozzle blockage detection module monitors the air flow parameters, injection pressure, air flow frequency and other data in real time, sets standard thresholds, determines whether the air nozzle is blocked, and sets multi-level warning thresholds. The corresponding cleaning strategy is implemented for the air nozzle according to the warning thresholds.

7. The sheet forming device for convenient stripping according to claim 6 is characterized in that: Set multiple levels of 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 made to work normally 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 put into normal working state by increasing the airflow frequency to exceed the airflow frequency limit but not exceeding the set range. The third-level warning threshold means that the air nozzle is severely blocked and the air nozzle cannot be put into normal working state by adjusting the airflow frequency.

8. The plate forming device for convenient stripping according to claim 6, characterized in that: According to the warning threshold, the corresponding cleaning strategy for the gas nozzle is implemented, 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 air flow 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.

9. The sheet forming device for convenient stripping according to claim 1, characterized in that: The flipping device includes a supporting platform fixedly connected to the surface of the press, an electric telescopic cylinder is fixedly installed inside the supporting 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 supporting platform, and the lower mold is hinged to the surface of the supporting platform.

10. 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.

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