Press machine mold clamping intelligent positioning system and control method

Abstract

The invention discloses a press machine mold clamping intelligent positioning system and a control method, the positioning system comprises a workbench, a servo positioning electric cylinder, a mold pushing air cylinder, a mold lifting device and a laser distance measuring sensor are installed on the workbench, the mold lifting device is embedded in the middle of the workbench, and the bottom of the mold lifting device is connected with a mold lifting driving device; the upper surface of the die lifting device is higher than the upper surface of the workbench in a lifting state and lower than the upper surface of the workbench in a reset state, grooves are formed in the positions, corresponding to an electric telescopic rod of the servo positioning electric cylinder and a pneumatic telescopic rod of the die pushing air cylinder, of the workbench, a positioning plate is arranged at the tail end of the electric telescopic rod, and a pushing plate is arranged at the tail end of the pneumatic telescopic rod. The upper surfaces of the positioning plate and the push plate are higher than the lower surface of the mold in the lifting state, and the servo positioning electric cylinder, the mold pushing air cylinder, the laser distance measuring sensor and the mold lifting driving device are all connected with the control system. Through cooperative control, full-automatic high-precision positioning of the die is achieved, and the clamping efficiency and the positioning precision are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of presses, and particularly relates to an intelligent positioning system and control method for clamping a press die. Background Art

[0002] Traditional press dies are generally installed manually. The die is transported to the workbench of the press by a forklift or a die transfer device, and then adjusted manually by an operator. The die is pushed to a designated position and positioned by a positioning pin. There are the following problems with this die positioning method: (1) Time-consuming for trial die correction When installing a die using the traditional positioning method, it is often necessary to repeatedly perform trial die correction to determine the accurate position. This process is time-consuming, usually taking 1 - 2 hours. In the multi-variety and small-batch production mode, due to the need to frequently change dies, this trial die correction method greatly reduces the production efficiency.

[0003] (2) Deviation in manual operation There are significant differences in the techniques of manual operation during die positioning. Different operators may adjust the die position differently, which easily leads to positioning deviation. Moreover, in order to ensure the accuracy of positioning, it is often necessary to rely on experienced operators, which undoubtedly increases the labor cost.

[0004] (3) Insufficient precision and poor stability Limited positioning precision: The positioning precision of traditional mechanical limit blocks can usually only reach ±0.5 mm, while in some precision stamping fields, such as the production of automotive body panels and electronic connectors, extremely high requirements are placed on the die positioning precision, often requiring a level of ±0.02 mm. This gap in precision makes the traditional positioning method difficult to meet the needs of precision stamping.

[0005] (4) Wear of the positioning device due to long-term use In the case of long-term use of the positioning device, due to improper operation by the operator, the positioning pin is repeatedly hit, resulting in dimensional deviation and out-of-roundness of the positioning pin holes on the workbench, affecting the precision of repeated positioning.

[0006] (5) Poor flexibility of the positioning device The position of the positioning pin holes can only adapt to some dies, requiring the corresponding positioning dimensions on the die to be the same. If a new die does not correspond to the positioning dimensions, it is impossible to perform relatively accurate installation and positioning, and manual adjustment is required, resulting in a significant decrease in positioning precision. Summary of the Invention

[0007] The object of the present invention is to provide an intelligent positioning system and control method for clamping a press die to solve the problems existing in the prior art.

[0008] The object of the present invention is achieved as follows: An intelligent positioning system for clamping a press die includes a workbench, on which a servo positioning electric cylinder, a die pushing air cylinder, a die lifting device and a laser distance sensor are installed. The servo positioning electric cylinder is arranged on the left and rear sides of the edge of the workbench, the die pushing air cylinder is arranged on the right and rear sides of the edge of the workbench, the die lifting device is embedded in the middle of the workbench and is connected with a die lifting driving device at the bottom. The upper surface of the die lifting device is higher than the upper surface of the workbench in the lifting state and lower than the upper surface of the workbench in the reset state. The laser distance sensor is arranged on the right and front sides of the edge of the workbench. The workbench is provided with grooves corresponding to the positions of the electric telescopic rod of the servo positioning electric cylinder and the pneumatic telescopic rod of the die pushing air cylinder. A positioning plate is arranged at the end of the electric telescopic rod, and a pushing plate is arranged at the end of the pneumatic telescopic rod. The upper surfaces of the positioning plate and the pushing plate are higher than the lower surface of the die in the lifting state. The servo positioning electric cylinder, the die pushing air cylinder, the laser distance sensor and the die lifting driving device are all connected with a control system.

[0009] The intelligent positioning system for clamping a press die of the present invention can realize the full-automatic high-precision positioning of the die through the coordinated control of the servo positioning electric cylinder, the die pushing air cylinder, the die lifting device and the laser distance sensor. The control system uniformly schedules the actions of each module, significantly improves the clamping efficiency and positioning accuracy, and at the same time ensures the operation safety, avoiding the problems of repeated calibration, poor accuracy and low efficiency in manual operation.

[0010] As a further improvement of the present invention, the cylinder telescopic rod of the die pushing air cylinder located on the right side of the edge of the workbench is in the initial state at the limit contraction position and the pushing plate is located on the right side of the die. The cylinder telescopic rod of the die pushing air cylinder located on the rear side of the edge of the workbench is in the initial state at the limit extended position and the pushing plate is located on the front side of the die, forming a two-way limiting reference, improving the multi-axial coordinated positioning efficiency and reducing the risk of mechanical interference at the same time.

[0011] As a further improvement of the present invention, the number of the servo positioning electric cylinders and the die pushing air cylinders located on the right side of the edge of the workbench is two, and the two servo positioning electric cylinders are clamped between the die pushing air cylinders, enhancing the stability of the lateral positioning of the die.

[0012] As a further improvement of the present invention, there are 2 die lifting devices, which are arranged between the servo positioning electric cylinder and the die pushing air cylinder. The upper surface of the die lifting device is 3 mm higher than the upper surface of the workbench in the lifting state, taking into account the support balance and the structural space compactness.

[0013] As a further improvement of the present invention, a ball array is arranged at the top of the die lifting device, which is used to support the die in the lifting state and assist in planar movement, reducing the translational friction resistance of the die.

[0014] As a further improvement of the present invention, both sides of the positioning plate and the pushing plate are slidably connected to the groove, improving the smoothness and straightness of movement.

[0015] As a further improvement of the present invention, the control system is connected with a human-machine interface to realize parameter visualization and facilitate manual intervention.

[0016] As a further improvement of the present invention, the control system further includes a closed-loop detection module. After the servo positioning electric cylinder and the die pushing cylinder complete die positioning, the closed-loop detection module measures the actual value of the relative position between the die and the workbench through a laser distance sensor, and compares it with the theoretical value of the relative position between the die and the workbench; if the deviation exceeds the threshold, an alarm is triggered and the stamping operation is prohibited, forming a dual verification mechanism for position error and eliminating the risk of out-of-tolerance.

[0017] The present invention also provides a control method for an intelligent positioning system for clamping a press die, including the following steps: (1) Create a die number through the human-machine interface, input the die size data and the center deviation data and save them, or input the die number already stored in the control system. The control system generates the displacement of the servo positioning electric cylinder and the theoretical value data of the relative position between the die and the workbench in combination with the workbench size data; (2) Install the die on the workbench, and the control system controls the die lifting device to lift the die; (3) The control system controls the servo positioning electric cylinder to run to the specified position, and then controls the die pushing cylinder to work, pushing the die until the die stops moving under the limit of the servo positioning electric cylinder; (4) Measure the actual value of the relative position between the die and the workbench through the laser distance sensor, and compare it with the theoretical value of the relative position between the die and the workbench generated by the control system. If the deviation exceeds the threshold, the control system issues an alarm prompt and enters step (5). If the deviation does not exceed the threshold, enter step (6); (5) The control system controls the servo positioning electric cylinder and the die pushing cylinder to reset. The operator re-measures the die size data, inputs it into the control system and saves it, and then re-executes step (3); (6) The die lifting device, the servo positioning electric cylinder, and the die pushing cylinder reset, the die fits with the workbench, the die is clamped, and the die positioning and installation are completed.

[0018] As a further improvement of the control method of the present invention, in step (1), the displacement of the servo positioning electric cylinder includes the displacement E of the rear positioning electric cylinder and the displacement F of the left positioning electric cylinder. The theoretical value of the relative position between the die and the workbench includes the theoretical distance G between the front laser distance sensor and the front side of the die and the theoretical distance H between the right laser distance sensor and the right side of the die. The calculation formulas are respectively: E = (D - B) / 2 + Y; F = (C - A) / 2 + X; G = D - B - E; H = C - A - F; Wherein, A is the left - right length of the mold, B is the front - back dimension of the mold, C is the left - right dimension of the workbench, D is the front - back dimension of the workbench, X is the left - right deviation between the mold center and the workbench center, and Y is the front - back deviation between the mold center and the workbench center.

[0019] The intelligent positioning system and control method for clamping a press mold of the present invention have the following advantages: (1) Achieve precise positioning of the mold. Replace the mechanical positioning method of positioning pins with a servo - positioning electric cylinder. Call the mold positioning data stored in the system, and use a high - precision servo electric cylinder to adjust the position of the mold to ensure the positioning accuracy of mold installation.

[0020] (2) Adapt to molds with different sizes. Record the mold positioning data after the first mold installation, and call the system data for automatic positioning during subsequent mold installations, with high mold installation and positioning efficiency.

[0021] (3) Replace manual positioning, greatly reducing the labor intensity during the mold installation process and eliminating positioning deviations caused by human factors.

[0022] (4) Measure the position of the mold through a laser ranging sensor, compare with the corresponding mold positioning parameters in the database, and multiplex multiple sensors to achieve closed - loop control. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three - dimensional schematic diagram of the intelligent positioning system for clamping a press mold of the present invention.

[0024] Figure 2 For Figure 1 The top view (after removing the mold).

[0025] Figure 3 It is a schematic diagram of the control system of the intelligent positioning system for clamping a press mold of the present invention.

[0026] Wherein, 1 is the workbench; 2 is the left - side positioning electric cylinder; 3 is the first rear - side positioning electric cylinder; 4 is the second rear - side positioning electric cylinder; 5 is the right - side pushing cylinder; 6 is the first rear - side pushing cylinder; 7 is the second rear - side pushing cylinder; 8 is the positioning plate; 9 is the pushing plate; 10 is the first mold - lifting device; 11 is the second mold - lifting device; 12 is the right - side ranging sensor; 13 is the front - side ranging sensor; 14 is the mold. DETAILED DESCRIPTION OF THE INVENTION

[0027] Such as Figures 1-3The shown intelligent positioning system for clamping a press die includes a workbench 1, on which a servo positioning electric cylinder for die positioning, a die pushing air cylinder for adjusting the position of the moving die, a die lifting device for lifting the die, and a laser distance sensor for precisely measuring the relative position between the die and the workbench are installed.

[0028] Specifically, the servo positioning electric cylinder includes a left-side positioning electric cylinder 2 arranged on the left side of the edge of the workbench 1, a rear-side positioning electric cylinder 1 3 and a rear-side positioning electric cylinder 2 4 arranged on the rear side of the edge of the workbench 1. The die pushing air cylinder includes a right-side pushing air cylinder 5 arranged on the right side of the edge of the workbench 1, a rear-side pushing air cylinder 1 6 and a rear-side pushing air cylinder 2 7 arranged on the rear side of the edge of the workbench 1. The rear-side positioning electric cylinder 1 3 and the rear-side positioning electric cylinder 2 4 are clamped between the rear-side pushing air cylinder 1 6 and the rear-side pushing air cylinder 2 7. The workbench 1 is provided with grooves corresponding to the positions where the electric telescopic rods of the servo positioning electric cylinder and the pneumatic telescopic rods of the die pushing air cylinder are arranged. A positioning plate 8 is provided at the end of the electric telescopic rod, and a pushing plate 9 is provided at the end of the pneumatic telescopic rod. The upper surfaces of the positioning plate 8 and the pushing plate 9 are higher than the lower surface of the die in the lifted state. The two sides of the positioning plate 8 and the pushing plate 9 are slidably connected to the grooves, improving the smoothness and straightness of the lifting movement. In this embodiment, the cylinder telescopic rod of the right-side pushing air cylinder 5 is in the extreme retracted position in the initial state, and it pushes the die 14 from right to left when working; the cylinder telescopic rods of the rear-side pushing air cylinder 1 6 and the rear-side pushing air cylinder 2 7 are in the extreme extended position in the initial state, and they pull the die 14 from front to back when working.

[0029] The die lifting device is embedded and installed in the middle of the workbench 1 and is connected to a die lifting driving device (a hydraulic pump station in this embodiment) at the bottom. Specifically, the die lifting device includes a die lifting device 1 10 arranged between the rear-side positioning electric cylinder 1 3 and the rear-side pushing air cylinder 1 6, and a die lifting device 2 11 arranged between the rear-side positioning electric cylinder 2 4 and the rear-side pushing air cylinder 2 7. The upper surfaces of the die lifting device 1 10 and the die lifting device 2 11 are 3 mm higher than the upper surface of the workbench 1 in the lifted state and lower than the upper surface of the workbench 1 in the reset state. A ball array is provided at the top of the die lifting device 1 10 and the die lifting device 2 11, which is used to support the die 14 and assist in planar movement in the lifted state, reducing the translational friction resistance of the die 14.

[0030] The laser distance sensor includes a right-side distance sensor 12 arranged on the right side of the edge of the workbench 1 and a front-side distance sensor 13 arranged on the front side of the edge of the workbench 1, which is used to measure the actual value of the relative position between the die and the workbench.

[0031] The left positioning electric cylinder 2, the rear positioning electric cylinder 1 3, the rear positioning electric cylinder 2 4, the right pushing cylinder 5, the rear pushing cylinder 1 6, the rear pushing cylinder 2 7, the mold lifting drive devices of the mold lifting device 1 10 and the mold lifting device 2 11, the right distance measuring sensor 12, and the front distance measuring sensor 13 are all connected to the control system. The control system is connected to the servo driver, and the control system issues control instructions to precisely control the position of the servo positioning electric cylinder. Then, the mold is pushed to the predetermined position by the mold pushing cylinder, avoiding the problems of repeated calibration, poor accuracy, and low efficiency in manual operation. The laser distance measuring sensor precisely measures the relative position between the mold and the workbench, and the measurement data is fed back to the control system. The control system includes a closed-loop detection module. After the servo positioning electric cylinder and the mold pushing cylinder complete the mold positioning, the closed-loop detection module measures the actual value of the relative position between the mold and the workbench through the laser distance measuring sensor, and compares it with the theoretical value of the relative position between the mold and the workbench. If the deviation exceeds the threshold, an alarm is triggered and the stamping operation is prohibited, forming a dual verification mechanism for position error and eliminating the risk of out-of-tolerance.

[0032] The displacement data of the servo positioning electric cylinder and the measurement data of the laser distance measuring sensor are stored in the control system. Such data is stored as the corresponding mold positioning parameters and stored in the system according to the mold number. When the mold is installed next time, the system data is called according to the corresponding mold number to automatically adjust the displacement of the servo positioning electric cylinder, and then the mold is pushed to the specified position by the mold pushing cylinder to complete the mold positioning and installation. The control system is also connected to a human-machine interface to realize parameter visualization and facilitate manual intervention.

[0033] For the intelligent positioning system for clamping the press mold in this embodiment, for a newly used mold for the first time, the control method steps are as follows: (1) According to the theoretical planar dimensions of the installed mold, i.e., the mold dimensions (A left and right, B front and back), the outer dimensions of the mold and the mold positioning data (the center deviation of the mold center from the workbench center, X left and right, Y front and back) are entered into the system through the human-machine interface. The system automatically calculates the displacement data of the servo positioning electric cylinder by combining the workbench dimensions (C left and right, D front and back) and the above data. Among them, the displacement of the rear positioning electric cylinder E = (D - B) / 2 + Y, and the displacement of the left positioning electric cylinder F = (C - A) / 2 + X. At the same time, the theoretical value data of the relative position between the mold and the workbench is generated. Among them, the theoretical distance G between the front laser distance measuring sensor and the front side of the mold = D - B - E, and the theoretical distance H between the right laser distance measuring sensor and the right side of the mold = C - A - F.

[0034] (2) Place the mold on the workbench, start the mold lifting device, and pressurize through the hydraulic pump station to lift the mold lifting device. The mold is separated from the workbench and supported by the roller array, and is in a state where it can be pushed.

[0035] (3) The control system drives the servo positioning electric cylinder to run to the specified position according to the displacement data calculated in step (1). After the servo positioning electric cylinder reaches the position, the mold pushing cylinders on the right side and the rear side work simultaneously to push the mold until the mold stops moving due to the limit of the servo positioning electric cylinder, completing the positioning.

[0036] (4) Measure the actual value of the relative position between the mold and the workbench through the laser distance sensor, and compare it with the theoretical value of the relative position between the mold and the workbench generated by the control system. If the deviation exceeds the threshold, the control system issues an alarm prompt and enters step (5); if the deviation does not exceed the threshold, enter step (6); (5) The control system controls the servo positioning electric cylinder and the mold pushing cylinder to reset. The operator re-measures the mold size data, enters it into the control system and saves it, and then re-executes step (3); (6) The mold lifting device, the servo positioning electric cylinder, and the mold pushing cylinder reset. The mold fits with the workbench, and the mold is clamped to complete the positioning and installation of the mold.

[0037] Since data such as the mold size (A, B) and the positioning deviation data (X, Y) have been stored in the control system according to the mold number, a mapping relationship between the mold number and the positioning parameters is established, which is convenient for subsequent quick call. Therefore, when using this mold subsequently, in step (1) above, only the mold number needs to be input or selected through the human-machine interface to call the relevant data. The subsequent steps are the same as above and will not be elaborated.

[0038] The intelligent positioning system for the clamping of the press mold in this embodiment is specifically installed and operated as follows: (I) Equipment installation and initialization 1. Installation of the servo positioning electric cylinder Install 1 servo positioning electric cylinder on the left edge of the workbench and 2 servo positioning electric cylinders on the rear edge for the longitudinal and lateral limits of the mold. The servo positioning electric cylinder is fixed by bolts to ensure that its movement direction is parallel to the workbench plane, and it is connected to the servo driver through the control system.

[0039] 2. Installation of the mold pushing cylinder Install a horizontal pushing cylinder (responsible for the left and right movement of the mold) on the right edge of the workbench and a longitudinal pushing cylinder (responsible for the front and back movement of the mold) on the rear side. The air circuit of the cylinder is connected to the air source and communicates with the control system through the solenoid valve.

[0040] 3. Configuration of the mold lifting device Embed the mold lifting device into the workbench plate, and its top surface is lower than the workbench surface in the initial state. The mold lifting device is driven by a hydraulic pump station, and a ball array is provided on the top for supporting the mold and reducing the moving friction.

[0041] 4. Installation of the laser distance sensor Install 1 laser ranging sensor on the front side and the right side of the workbench respectively, which is used to measure the distance between the mold edge and the reference point of the workbench in real time. The sensor is connected to the control system through a data cable to ensure that the sampling frequency matches the positioning accuracy.

[0042] (2) Mold data entry and parameter calculation 1. Mold parameter input Enter the mold bottom plate size (length A, width B), workbench size (left and right C, front and back D), and the deviation values of the mold center and the workbench center (left and right X, front and back Y) through the human-machine interface.

[0043] 2. Servo cylinder displacement calculation The control system automatically generates the target position of the servo positioning cylinder according to the formula: Longitudinal displacement (rear cylinder): E = (D - B) / 2 + Y Lateral displacement (left cylinder): F = (C - A) / 2 + X At the same time, calculate the theoretical distance between the laser sensor and the mold edge according to the position of the positioning cylinder Value of the front laser displacement sensor G = D - B - E; Value of the right laser displacement sensor H = C - A - F After the calculation is completed, the data is temporarily stored in the temporary storage area of the control system.

[0044] (3) First mold positioning process 1. Mold placement and lifting of the mold lifting device Place the mold on the workbench plate, start the hydraulic pump station, and lift the mold lifting device 3 mm above the table surface so that the mold is supported by the balls and can move freely. Servo cylinder positioning: The control system drives the left and rear servo cylinders to move to the calculated target positions to form the longitudinal and lateral limit points of the mold.

[0045] 2. Pneumatic cylinder action The right pneumatic cylinder pushes the mold to move laterally, and the rear pneumatic cylinder pushes it longitudinally until the mold touches the servo cylinder limit block and then stops.

[0046] 3. Manual verification and correction The operator checks whether the mold size is consistent with the data input into the system. If there is a deviation, re-enter the actual mold size values (A, B) on the human-machine interface, and the system recalculates the servo cylinder displacement and repeats steps 2 and 3 until the positioning is accurate.

[0047] 4. Fix the mold Lower the mold lifting device, make the mold fit with the workbench surface, and reset all pneumatic cylinders and servo cylinders to their initial positions. Complete the final fixation of the mold through bolts or fixtures.

[0048] (4) Data Storage and Mold Number Management 1. Associated Data Storage Bind the servo cylinder displacement data of the current mold and the measurement values of the laser ranging sensor (such as the actual size of the mold edge from the reference point) to the unique mold number and store them in the control system database.

[0049] 2. Retrieval of Historical Data When installing the same mold next time, input the mold number, and the system will automatically retrieve the corresponding parameters and start the positioning process with one key.

[0050] (5) Closed-loop Detection and Alarm Mechanism 1. Automatic Positioning and Data Comparison After retrieving the historical data, the system controls the servo cylinder and the pushing cylinder to complete the positioning. The laser sensor measures the mold position in real time and compares it with the stored data.

[0051] 2. Deviation Judgment and Alarm If the deviation value ≤ the set threshold (such as ±0.2 mm), the system will prompt "Positioning completed" and allow the stamping operation. If the deviation exceeds the limit, the system will lock the machine tool and trigger an audible and visual alarm, prompting the operator to recheck; the parameters need to be manually corrected and the positioning process needs to be executed again.

[0052] (6) Implementation Example Take the mold numbered "M001" as an example: 1. Input the mold dimensions: A = 1000 mm, B = 600 mm, workbench dimensions C = 2000 mm, D = 1500 mm, center deviation X = 10 mm, Y = -5 mm.

[0053] The system calculates: Displacement of the left servo cylinder = (2000 - 1000) / 2 + 10 = 510 mm; Displacement of the rear cylinder = (1500 - 600) / 2 + (-5) = 445 mm.

[0054] Distance from the front laser displacement sensor to the mold = 1500 - 600 - 445 = 455; Distance from the right laser displacement sensor to the mold = 2000 - 1000 - 510 = 490; 2. After positioning, the laser sensor measures that the distance on the right side of the mold is 490.0 mm and the distance on the front side is 454.9 mm. The deviation is within ±0.2 mm, which is within the allowable range, and the positioning is determined to be valid.

[0055] The present invention is not limited to the above embodiments. Based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and deformations to some of the technical features without creative labor according to the disclosed technical content, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. An intelligent positioning system for clamping a press die, comprising a workbench, characterized in that: A servo positioning electric cylinder, a mold pushing air cylinder, a mold lifting device and a laser distance sensor are installed on the workbench. The servo positioning electric cylinder is arranged on the left and rear sides of the edge of the workbench. The mold pushing air cylinder is arranged on the right and rear sides of the edge of the workbench. The mold lifting device is embedded in the middle of the workbench and is connected with a mold lifting driving device at the bottom. The upper surface of the mold lifting device is higher than the upper surface of the workbench in the lifting state and lower than the upper surface of the workbench in the reset state. The laser distance sensor is arranged on the right and front sides of the edge of the workbench. The workbench is provided with grooves corresponding to the positions of the electric telescopic rod of the servo positioning electric cylinder and the pneumatic telescopic rod of the mold pushing air cylinder. A positioning plate is arranged at the end of the electric telescopic rod, and a pushing plate is arranged at the end of the pneumatic telescopic rod. The upper surfaces of the positioning plate and the pushing plate are higher than the lower surface of the mold in the lifting state. The servo positioning electric cylinder, the mold pushing air cylinder, the laser distance sensor and the mold lifting driving device are all connected to the control system.

2. The intelligent positioning system for clamping a press die according to claim 1, wherein: The cylinder telescopic rod of the mold pushing air cylinder located on the right side of the edge of the workbench is in the initial state at the limit contraction position and the pushing plate is located on the right side of the mold. The cylinder telescopic rod of the mold pushing air cylinder located on the rear side of the edge of the workbench is in the initial state at the limit extended position and the pushing plate is located in front of the mold.

3. The intelligent positioning system for clamping a press die according to claim 2, characterized in that: The number of the servo positioning electric cylinders and the mold pushing air cylinders located on the right side of the edge of the workbench is two, and the two servo positioning electric cylinders are clamped between the mold pushing air cylinders.

4. The intelligent positioning system for clamping a press die according to claim 3, characterized in that: There are 2 mold lifting devices, which are arranged between the servo positioning electric cylinder and the mold pushing air cylinder. The upper surface of the mold lifting device is 3 mm higher than the upper surface of the workbench in the lifting state.

5. The intelligent positioning system for clamping a press die according to claim 4, wherein: A ball array is arranged at the top of the mold lifting device.

6. The intelligent positioning system for clamping a press die according to claim 1, characterized in that: Both sides of the positioning plate and the pushing plate are slidably connected with the groove.

7. The intelligent positioning system for clamping a press die according to claim 2, characterized in that: The control system is connected with a human-machine interface.

8. The intelligent positioning system for clamping a press die according to claim 7, wherein: The control system further includes a closed-loop detection module. After the servo positioning electric cylinder and the mold pushing air cylinder complete the mold positioning, the closed-loop detection module measures the actual value of the relative position between the mold and the workbench through the laser distance sensor, and compares it with the theoretical value of the relative position between the mold and the workbench. If the deviation exceeds the threshold, an alarm is triggered.

9. The control method of the intelligent positioning system for clamping a press die according to claim 8, characterized in that, Including the following steps: (1) New mold numbers are created through the human-machine interface, mold size data and center deviation data are input and saved, or the mold numbers already stored in the control system are input. The control system generates the displacement of the servo positioning electric cylinder and the theoretical value data of the relative position between the mold and the workbench in combination with the workbench size data; (2) The mold is installed on the workbench, and the control system controls the mold lifting device to lift the mold; (3) The control system controls the servo positioning electric cylinder to run to the specified position, and then controls the mold pushing air cylinder to work, pushing the mold until the mold stops moving due to the limit of the servo positioning electric cylinder; (4) The actual value of the relative position between the mold and the workbench is measured through the laser distance sensor, and compared with the theoretical value of the relative position between the mold and the workbench generated by the control system. If the deviation exceeds the threshold, the control system issues an alarm prompt and enters step (5). If the deviation does not exceed the threshold, it enters step (6); (5) The control system controls the servo positioning electric cylinder and the mold pushing air cylinder to reset. The operator measures the mold size data again, inputs it into the control system and saves it, and then re-executes step (3); (6)The die lifting device, the servo positioning electric cylinder, and the die pushing cylinder are reset. The die fits with the workbench, and the die is clamped to complete the positioning and installation of the die.

10. The control method of the intelligent positioning system for clamping a press die according to claim 8, characterized in that, In step (1), the displacement of the servo positioning electric cylinder includes the displacement E of the rear positioning electric cylinder and the displacement F of the left positioning electric cylinder. The theoretical relative position between the die and the workbench includes the theoretical distance G between the front laser distance sensor and the front side of the die, and the theoretical distance H between the right laser distance sensor and the right side of the die. The calculation formulas are as follows: E = (D - B) / 2 + Y; F = (C - A) / 2 + X; G = D - B - E; H = C - A - F; Where, A is the left-right length of the die, B is the front-back dimension of the die, C is the left-right dimension of the workbench, D is the front-back dimension of the workbench, X is the left-right deviation between the center of the die and the center of the workbench, and Y is the front-back deviation between the center of the die and the center of the workbench.

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