Intelligent vibration reduction workbench based on pressure change-displacement conversion vibration detection and vibration reduction method

Abstract

The invention discloses an intelligent vibration reduction workbench based on pressure change-displacement conversion vibration detection and a vibration reduction method. The vibration reduction workbench comprises a bottom plate, an execution system, a lifting and fixing system, a regulation and control system and a measurement system. The execution system executes a self-adaptive vibration reduction function; the lifting fixing system is used for adjusting the position of the heavy workpiece blank; the regulation system is used for regulating the supporting strength of the execution system, and the measurement system is used for detecting and feeding back the vibration strength of the execution system. The vibration reduction method comprises the steps of preparation before machining, constant pressure maintaining of the execution system during machining, vibration suppression during machining and unloading and pressure recovery after machining is finished. By means of ingenious conversion of air pressure and displacement, the vibration change is amplified by means of a connecting rod mechanism, the PID control mechanism is combined, the detection precision, the regulation and control speed and the intelligent degree are improved, and it is ensured that heavy workpiece blank machining is effectively supported and subjected to vibration suppression.

Description

Technical Field

[0001] The present invention relates to the field of industrial machine tool processing, and particularly to an intelligent vibration damping workbench and a vibration damping method based on pressure-variable displacement conversion vibration detection. Background Art

[0002] Heavy workpieces are widely demanded in industrial fields such as aerospace, energy power, and shipbuilding. Their processing quality directly affects the stability and safety of the operation of such major equipment. Nowadays, the numerical control systems and tools for processing heavy workpieces are highly intelligent and complete. However, the workbenches for processing heavy workpieces are still relatively backward, with low intelligence and poor adaptability. How to design a highly intelligent workbench for processing heavy workpieces has become a key technology that must be mastered.

[0003] During the processing of heavy workpieces, due to the generally large processing vibration, the processing efficiency and precision are reduced, the tool wear and breakage speed are fast, and the production cost is high. How to effectively suppress the vibration during the processing of heavy workpieces and automatically adjust the position of the processing workbench for workpieces of different shapes is a technical problem urgently to be solved in this technical field. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an intelligent vibration damping workbench and a vibration damping method based on pressure-variable displacement conversion vibration detection. By means of the ingenious conversion of air pressure and displacement, and with the help of a link mechanism to amplify the vibration change, combined with the PID control mechanism, the detection accuracy, regulation speed and intelligence level are improved, ensuring effective support and vibration suppression for the rough machining of heavy workpieces.

[0005] To achieve the above object, the technical solution adopted by the present invention is: an intelligent vibration damping workbench based on pressure-variable displacement conversion vibration detection, including a bottom plate fixed on a machine tool, and an execution system, a lifting and fixing system, a regulation system and a measurement system are installed on the bottom plate; the upper surface of the execution system bears the heavy workpiece blank and executes the adaptive vibration damping function during the processing of the heavy workpiece blank, and the vibration damping mode of the execution system is air pressure vibration damping; the lifting and fixing system is arranged in a circumferential array centered on the execution system, and the lifting and fixing system is used to adjust the horizontal position and height of the heavy workpiece blank; the regulation system regulates the support strength of the execution system by converting displacement into air pressure change, and the measurement system detects and feedbacks the support strength of the execution system by converting air pressure change into displacement; the regulation system determines the regulation strategy of the support strength according to the difference between the measured value and the preset value; the regulation system and the measurement system are arranged on the side of the execution system and are arranged in a staggered layout with the lifting and fixing system.

[0006] As a preferred technical solution of the present invention, the lifting and fixing system includes 3 or 4 sets of three-axis cross-phase lifting and fixing devices. The three-axis cross-phase lifting and fixing device includes an X-axis feeding mechanism and a Y-axis feeding mechanism horizontally installed on the bottom plate. The Y-axis feeding mechanism is configured with a horizontal base, and a Z-axis feeding mechanism is vertically installed on the horizontal base. A T-shaped workbench is fixedly arranged on the Z-axis feeding mechanism, and a clamping mechanism is installed on the horizontal plane of the T-shaped workbench.

[0007] As a preferred technical solution of the present invention, the execution system is a disc-shaped elastic airbag with both upper and lower surfaces being flat. The elastic airbag is clamped between the bottom plate and the heavy workpiece blank.

[0008] As a preferred technical solution of the present invention, the regulation system includes an electric cylinder, a pneumatic cylinder A driven by the electric cylinder, a variable-diameter air duct A with its thin end connected to the output end of the pneumatic cylinder A. The thick end of the variable-diameter air duct A is communicated with the elastic airbag. The electric cylinder and the pneumatic cylinder A are fixed on the bottom plate through columns. The ratio of the diameter of the thin end to the diameter of the thick end of the variable-diameter air duct A is 1:100, and the pneumatic cylinder A is provided with a return spring.

[0009] As a preferred technical solution of the present invention, the measurement system includes a variable-diameter air duct B with its thick end communicated with the elastic airbag, a pneumatic cylinder B connected to the thin end of the variable-diameter air duct B, a four-bar linkage driven by the output end of the pneumatic cylinder B, a rack and pinion mechanism driven by the four-bar linkage, and a displacement sensor installed on the rack and pinion mechanism. The rack and pinion mechanism includes a gear and a rack that mesh with each other. The rack is vertically arranged, and the displacement sensor is installed at the bottom of the rack. The variable-diameter air duct B and the pneumatic cylinder B are both fixed on the bottom plate through columns. The four-bar linkage and the rack and pinion mechanism are installed on the detection frame, and the detection frame is fixed on the bottom plate. The ratio of the diameter of the thin end to the diameter of the thick end of the variable-diameter air duct B is 1:100, and the pneumatic cylinder B is provided with a return spring.

[0010] As a preferred technical solution of the present invention, the four-bar linkage is a swing guide bar mechanism with adjustable length of the connecting rod. The four-bar linkage includes a connecting rod, a connecting rod, a sliding sleeve, and a guide bar passing through the sliding sleeve that are sequentially hinged. The guide bar is fixed on the gear, and the guide bar or the extension line of the guide bar passes through the center of the gear.

[0011] As a preferred technical solution of the present invention, the connecting rod includes a thick section and a thin section that are nested with each other. The thick section is welded with an adjustment rack parallel to the connecting rod, and the thin section is provided with a motor and an adjustment gear driven by the motor. The adjustment rack and the adjustment gear mesh with each other.

[0012] The vibration reduction method of the intelligent vibration reduction workbench includes the following steps:

[0013] S1. Preparation before processing

[0014] S1-1. Adjust the length of the connecting rod: Estimate the weight of the heavy workpiece blank, start the motor in the measurement system to adjust the connecting rod of the four-bar linkage to a length suitable for the weight of the heavy workpiece blank;

[0015] S1-2. Pre-inflate: Start the electric cylinder in the control system to drive the air cylinder A to inflate the elastic airbag. Since the air cylinder B in the measurement system is connected to the elastic airbag, due to the change in air pressure, the air cylinder B outputs displacement, drives the four-bar linkage to move, and then the guide rod drives the gear to rotate, driving the rack to generate displacement in the vertical direction. Obtain the distance between the displacement sensor and the fixed base plate, which is recorded as the actual measured distance value before processing. Compare the actual measured distance value before processing with the set target distance value before processing to obtain the difference between the two. According to the difference, adjust the output of the electric cylinder to keep the elastic airbag in a low pressure state;

[0016] S1-3. Arrange the heavy workpiece blank: Place the heavy workpiece blank into the lifting and fixing system and clamp it by the clamping mechanism. Place the heavy workpiece blank above the airbag by adjusting the X-axis feeding mechanism, Y-axis feeding mechanism, and Z-axis feeding mechanism. Release the clamping mechanism and wait for the processing to start;

[0017] S2. During processing, the execution system maintains a constant pressure

[0018] After starting the processing, adjust the pressure of the elastic airbag to a state greater than the pressure before starting the processing; the electric cylinder in the control system works to inflate the elastic airbag through the air cylinder A to increase the pressure of the elastic airbag; due to the change in air pressure, according to the linkage relationship in step S1, finally obtain the distance between the displacement sensor and the fixed base plate, which is recorded as the actual measured distance value during processing. Compare the actual measured distance value during processing with the set target distance value during processing to obtain the difference between the two. According to the difference, adjust the output of the electric cylinder to keep the elastic airbag in a constant pressure state and ensure the basic steady state during processing; S3. Suppress the vibration generated during processing

[0019] During the processing of the heavy workpiece blank, vibration occurs. The internal pressure of the elastic airbag changes due to the vibration. According to the linkage relationship in step S1, the measured value of the displacement sensor changes. Compare the actual measured displacement of the displacement sensor with the set vibration target value during processing. According to the specific difference, control the output of the electric cylinder to achieve the purpose of keeping the elastic airbag in a constant pressure state, providing support for the workpiece and effectively suppressing the vibration during processing;

[0020] S4. Unload and pressure recovery after processing

[0021] Adjust the pressure of the elastic airbag to be less than the pressure state of the elastic airbag during the processing. The electric cylinder in the control system moves backward, and the gas in the elastic airbag is pumped out through the variable-diameter air duct A to reduce the pressure of the elastic airbag. According to the linkage relationship in step S1, it ultimately causes the measured value of the displacement sensor to change. The actual measured displacement of the displacement sensor is compared with the set target value after processing, and the output of the electric cylinder is controlled according to the specific difference, so as to keep the elastic airbag in a low-pressure state and prepare for the next processing.

[0022] The beneficial effects of adopting the above technical solutions are as follows: The present invention utilizes the ingenious conversion between air pressure and displacement, amplifies the vibration change with the help of the linkage mechanism, and combines the PID control mechanism to improve the detection accuracy, regulation speed and intelligence level, and ensure the effective support and vibration suppression of the rough machining of heavy workpieces. Specifically, the lifting and fixing system can adjust the workpiece to be processed to a suitable position, reduce labor costs, and improve the automation level and processing efficiency; the four-bar linkage mechanism is selected to convert the pressure measurement problem in the elastic airbag into the displacement measurement problem of the rack, and at the same time, the amplification function of the four-bar linkage mechanism system is used to significantly improve the pressure measurement accuracy. The high-precision displacement sensor is used to achieve high-precision identification of the vibration during the processing. The elastic airbag is continuously inflated or deflated by the high-precision electric cylinder to keep the elastic airbag in a constant pressure state, providing effective support for the heavy workpiece blank during the processing, significantly reducing the processing vibration, and improving the processing quality and efficiency. The present invention adopts a pneumatic transmission method, and the smooth movement ensures no additional vibration interference during the test. At the same time, the workbench has a perfect structure, reasonable layout, strong adaptability, long service life and high measurement accuracy, solving the problems of difficult adjustment of the processing position of heavy workpieces, difficult effective suppression of processing vibration and single application scenario and poor universality of traditional workbenches, and having good economic benefits and promotion value. Brief Description of the Drawings

[0023] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0024] Figure 1 It is an axonometric view of the overall structure of the intelligent vibration damping workbench.

[0025] Figure 2 It is a top view of the overall structure of the intelligent vibration damping workbench.

[0026] Figure 3 It is an axonometric view of the structure of the intelligent vibration damping workbench with the workpiece and the lifting and fixing system removed.

[0027] Figure 4 It is a front view of the structure of the intelligent vibration damping workbench with the workpiece and the lifting and fixing system removed.

[0028] Figure 5 It is an axonometric view of the structure of the lifting and fixing system of the intelligent vibration damping workbench.

[0029] Figure 6 It is the front view of the intelligent vibration damping workbench control system.

[0030] Figure 7 It is the front view of the intelligent vibration damping workbench measurement system.

[0031] Figure 8 It is the axonometric view of the four-bar linkage system of the intelligent vibration damping workbench.

[0032] Figure 9 It is the operation flowchart of the vibration damping method of the present invention.

[0033] In the figure: 1. Bottom plate; 2. Lifting and fixing system; 3. Regulation system; 4. Heavy workpiece blank; 5. Execution system; 6. Measurement system; 7. Column; 8. Electric cylinder; 9. Pneumatic cylinder A; 10. Variable-diameter air duct A; 11. Variable-diameter air duct B; 12. Pneumatic cylinder B; 13. Gear; 14. Rack; 15. Connecting rod; 16. Connecting rod with bracket; 17. Sliding sleeve; 18. Guide rod; 19. Adjusting rack; 20. Motor; 21. Adjusting rack; 22. Detection frame; 23. Displacement sensor; 24. X-axis feeding mechanism; 25. Y-axis feeding mechanism; 26. Horizontal base; 27. Z-axis feeding mechanism; 28. T-shaped workbench; 29. Clamping mechanism. Specific embodiments

[0034] Refer to the appendix Figures 1-9 , in the structure of the intelligent vibration damping workbench based on pressure-variation - displacement conversion vibration detection of the present invention, it includes a bottom plate 1 fixed on the machine tool, and an execution system, a lifting and fixing system, a regulation system, and a measurement system are installed on the bottom plate; the upper surface of the execution system bears the heavy workpiece blank and executes the adaptive vibration damping function during the processing of the heavy workpiece blank, and the vibration damping method of the execution system is pneumatic vibration damping; the lifting and fixing system is arranged in a circular array centered on the execution system, and the lifting and fixing system is used to adjust the horizontal position and height of the heavy workpiece blank; the regulation system regulates the support strength of the execution system by converting displacement into air pressure change, and the measurement system detects and feeds back the support strength of the execution system by converting air pressure change into displacement; the regulation system determines the regulation strategy of the support strength according to the difference between the measured value and the preset value; the regulation system and the measurement system are arranged on the side of the execution system and are arranged in a staggered layout with the lifting and fixing system.

[0035] The lifting and fixing system includes 4 groups of three-axis cross-phase lifting and fixing devices. Each three-axis cross-phase lifting and fixing device includes an X-axis feeding mechanism and a Y-axis feeding mechanism horizontally installed on the bottom plate. The Y-axis feeding mechanism is configured with a horizontal base platform, on which a Z-axis feeding mechanism is vertically installed. A T-shaped workbench is fixedly arranged on the Z-axis feeding mechanism, and a clamping mechanism is installed on the horizontal plane of the T-shaped workbench. The structure of the three-axis cross-phase lifting and fixing device is complex and large in size. To avoid clutter in the attached drawings and obstruction of other components, 2 groups are omitted in the figure, and only 2 groups are shown.

[0036] The execution system is a disc-shaped elastic airbag with flat upper and lower surfaces, and the elastic airbag is clamped between the bottom plate and the heavy workpiece blank.

[0037] The control system includes an electric cylinder, a pneumatic cylinder A driven by the electric cylinder, and a variable-diameter air duct A with its thin end connected to the output end of the pneumatic cylinder A. The thick end of the variable-diameter air duct A communicates with the elastic airbag. The electric cylinder and the pneumatic cylinder A are fixed on the bottom plate through columns. The ratio of the diameter of the thin end to the diameter of the thick end of the variable-diameter air duct A is 1:100, and the pneumatic cylinder A is equipped with a return spring.

[0038] The measurement system includes a variable-diameter air duct B with its thick end communicating with the elastic airbag, a pneumatic cylinder B connected to the thin end of the variable-diameter air duct B, a four-bar linkage driven by the output end of the pneumatic cylinder B, a rack and pinion mechanism driven by the four-bar linkage, and a displacement sensor installed on the rack and pinion mechanism. The rack and pinion mechanism includes a meshing gear and rack, the rack is vertically arranged, and the displacement sensor is installed at the bottom of the rack. The variable-diameter air duct B and the pneumatic cylinder B are both fixed on the bottom plate through columns. The four-bar linkage and the rack and pinion mechanism are installed on a detection frame, and the detection frame is fixed on the bottom plate. The ratio of the diameter of the thin end to the diameter of the thick end of the variable-diameter air duct B is 1:100, and the pneumatic cylinder B is equipped with a return spring.

[0039] The four-bar linkage is a swing guide bar mechanism with adjustable connecting rod lengths. The four-bar linkage includes a connecting rod, a connecting rod, a sliding sleeve, and a guide bar passing through the sliding sleeve in sequence. The guide bar is fixed on the gear, and the guide bar or the extension line of the guide bar passes through the center of the gear.

[0040] The connecting rod includes a thick section and a thin section nested with each other. The thick section is welded with an adjustment rack parallel to the connecting rod, and the thin section is provided with a motor and an adjustment gear driven by the motor. The adjustment rack and the adjustment gear mesh with each other.

[0041] See Appendix Figure 9 , The vibration reduction method of the intelligent vibration reduction workbench includes the following steps:

[0042] S1. Preparation before processing

[0043] S1-1. Adjust the length of the connecting rod: Estimate the weight of the heavy workpiece blank, start the motor in the measurement system to adjust the connecting rod of the four-bar linkage to a length suitable for the weight of the heavy workpiece blank;

[0044] S1-2. Pre-inflate: Start the electric cylinder in the control system to drive the air cylinder A to inflate the elastic airbag. Since the air cylinder B in the measurement system is connected to the elastic airbag, due to the change in air pressure, the air cylinder B outputs a displacement, driving the four-bar linkage to move. Subsequently, the guide rod drives the gear to rotate, driving the rack to generate a displacement in the vertical direction, obtaining the distance between the displacement sensor and the fixed bottom plate, denoted as the actual measured distance value before processing. Compare the actual measured distance value before processing with the set target distance value before processing to obtain the difference between the two. According to the difference, adjust the output of the electric cylinder to keep the elastic airbag in a low-pressure state;

[0045] S1-3. Arrange the heavy workpiece blank: Place the heavy workpiece blank into the lifting and fixing system and clamp it by the clamping mechanism. Adjust the X-axis feed mechanism, Y-axis feed mechanism, and Z-axis feed mechanism to place the heavy workpiece blank above the airbag. The clamping mechanism is released and wait for the processing to start;

[0046] S2. During processing, the execution system maintains a constant pressure

[0047] After starting the processing, adjust the pressure of the elastic airbag to a state greater than the pressure before starting the processing; the electric cylinder in the control system works to inflate the elastic airbag through the air cylinder A to increase the pressure of the elastic airbag; due to the change in air pressure, according to the linkage relationship in step S1, finally obtain the distance between the displacement sensor and the fixed bottom plate, denoted as the actual measured distance value during processing. Compare the actual measured distance value during processing with the set target distance value during processing to obtain the difference between the two. According to the difference, adjust the output of the electric cylinder to keep the elastic airbag in a constant pressure state, ensuring the basic steady state during processing; S3. Suppress the vibration generated during processing

[0048] During the processing of the heavy workpiece blank, vibration is generated. The internal pressure of the elastic airbag changes due to the vibration. According to the linkage relationship in step S1, the measured value of the displacement sensor changes. Compare the actual measured displacement of the displacement sensor with the set vibration target value during processing. According to the specific difference, control the output of the electric cylinder to achieve the purpose of keeping the elastic airbag in a constant pressure state, providing support for the workpiece while effectively suppressing the vibration during processing;

[0049] S4. Unload and pressure recovery after processing

[0050] Adjust the pressure of the elastic airbag to be less than the pressure state of the elastic airbag during the processing. The electric cylinder in the control system moves backward, and the gas in the elastic airbag is pumped out through the variable-diameter air duct A to reduce the pressure of the elastic airbag. According to the linkage relationship in step S1, it ultimately causes the measured value of the displacement sensor to change. By comparing the actual measured displacement of the displacement sensor with the set target value after processing, the output of the electric cylinder is controlled according to the specific difference, so as to keep the elastic airbag in a low-pressure state and prepare for the next processing.

[0051] The above description is only proposed as a feasible technical solution of the present invention and does not serve as a single limiting condition for its technical solution itself.

Claims

1. The intelligent vibration damping workbench based on pressure-variation displacement conversion vibration detection is characterized in that: It includes a base plate fixed on a machine tool, and an execution system, a lifting and fixing system, a regulation system, and a measurement system are installed on the base plate; The upper surface of the execution system bears a heavy workpiece blank and performs an adaptive vibration damping function during the processing of the heavy workpiece blank. The vibration damping method of the execution system is pneumatic vibration damping; The lifting and fixing system is arranged in a circular array centered on the execution system, and is used to adjust the horizontal position and height of the heavy workpiece blank; The regulation system regulates the support strength of the execution system by converting displacement into air pressure change, and the measurement system detects and feedbacks the support strength of the execution system by converting air pressure change into displacement; The regulation system determines the regulation strategy of the support strength according to the difference between the measured value and the preset value; The regulation system and the measurement system are arranged on the side of the execution system and are arranged out of alignment with the lifting and fixing system.

2. The intelligent vibration damping workbench based on pressure-variable displacement conversion vibration detection according to claim 1, characterized in that: The lifting and fixing system includes 3 or 4 three-axis cross-phase lifting and fixing devices. The three-axis cross-phase lifting and fixing device includes an X-axis feeding mechanism and a Y-axis feeding mechanism horizontally installed on the base plate. The Y-axis feeding mechanism is configured with a horizontal base, and a Z-axis feeding mechanism is vertically installed on the horizontal base. A T-shaped workbench is fixedly arranged on the Z-axis feeding mechanism, and a clamping mechanism is installed on the horizontal plane of the T-shaped workbench.

3. The intelligent vibration damping workbench based on pressure-variable displacement conversion vibration detection according to claim 1, characterized in that: The execution system is a disc-shaped elastic airbag with flat upper and lower surfaces, and the elastic airbag is clamped between the base plate and the heavy workpiece blank.

4. The intelligent vibration damping workbench based on pressure-variable displacement conversion vibration detection according to claim 3, wherein: The regulation system includes an electric cylinder, a pneumatic cylinder A driven by the electric cylinder, and a variable-diameter air duct A with its thin end connected to the output end of the pneumatic cylinder A. The thick end of the variable-diameter air duct A is communicated with the elastic airbag. The electric cylinder and the pneumatic cylinder A are fixed on the base plate through columns. The ratio of the diameter of the thin end to the diameter of the thick end of the variable-diameter air duct A is 1:100, and the pneumatic cylinder A is provided with a return spring.

5. The intelligent vibration damping workbench based on pressure-variable displacement conversion vibration detection according to claim 3, wherein: The measurement system includes a variable-diameter air duct B with its thick end communicated with the elastic airbag, a pneumatic cylinder B connected to the thin end of the variable-diameter air duct B, a four-bar linkage driven by the output end of the pneumatic cylinder B, a rack and pinion mechanism driven by the four-bar linkage, and a displacement sensor installed on the rack and pinion mechanism. The rack and pinion mechanism includes a meshing gear and rack, the rack is vertically arranged, and the displacement sensor is installed at the bottom of the rack; the variable-diameter air duct B and the pneumatic cylinder B are both fixed on the base plate through columns, the four-bar linkage and the rack and pinion mechanism are installed on a detection frame, the detection frame is fixed on the base plate, the ratio of the diameter of the thin end to the diameter of the thick end of the variable-diameter air duct B is 1:100, and the pneumatic cylinder B is provided with a return spring.

6. The intelligent vibration damping workbench based on pressure-variable displacement conversion vibration detection according to claim 5, wherein: The four-bar linkage is a swing guide bar mechanism with adjustable length of the connecting rod. The four-bar linkage includes a connecting rod, a connecting rod, a sliding sleeve, and a guide bar inserted into the sliding sleeve that are sequentially hinged. The guide bar is fixed on the gear, and the guide bar or the extension line of the guide bar passes through the center of the gear.

7. The intelligent vibration damping workbench based on pressure-variable displacement conversion vibration detection according to claim 6, wherein: The connecting rod includes a thick section and a thin section nested with each other. The thick section is welded with an adjustment rack parallel to the connecting rod, and the thin section is provided with a motor and an adjustment gear driven by the motor. The adjustment rack and the adjustment gear mesh with each other.

8. A method for vibration reduction using the intelligent vibration reduction workbench according to any one of claims 1-7, characterized in that It includes the following steps: S1. Preparation before processing S1-1. Adjust the length of the connecting rod: Estimate the weight of the heavy workpiece blank, start the motor in the measurement system, and adjust the connecting rod of the four-bar mechanism to a length suitable for the weight of the heavy workpiece blank; S1-2. Pre-inflate: Start the electric cylinder in the control system to drive the air cylinder A to inflate the elastic airbag. Since the air cylinder B in the measurement system is connected to the elastic airbag, due to the air pressure change, the air cylinder B outputs displacement, drives the four-bar mechanism to move, and then the guide rod drives the gear to rotate, driving the rack to generate displacement in the vertical direction. Obtain the distance between the displacement sensor and the fixed bottom plate, denoted as the actual measured distance value before processing. Compare the actual measured distance value before processing with the set target distance value before processing to obtain the difference between the two. According to the difference, adjust the output of the electric cylinder to keep the elastic airbag in a low-pressure state; S1-3. Arrange the heavy workpiece blank: Place the heavy workpiece blank into the lifting and fixing system and clamp it by the clamping mechanism. Adjust the X-axis feed mechanism, Y-axis feed mechanism, and Z-axis feed mechanism to place the heavy workpiece blank above the airbag. Release the clamping mechanism and wait for the processing to start; S2. During processing, the execution system maintains a constant pressure After starting the processing, adjust the pressure of the elastic airbag to a state greater than the pressure before the start of processing; the electric cylinder in the control system works to inflate the elastic airbag through the air cylinder A, increasing the pressure of the elastic airbag. Due to the air pressure change, according to the linkage relationship in step S1, finally obtain the distance between the displacement sensor and the fixed bottom plate, denoted as the actual measured distance value during processing. Compare the actual measured distance value during processing with the set target distance value during processing to obtain the difference between the two. According to the difference, adjust the output of the electric cylinder to keep the elastic airbag in a constant pressure state and ensure the basic steady state during processing; S3. Suppress the vibration generated during processing During the processing of the heavy workpiece blank, vibration occurs. The internal pressure of the elastic airbag changes due to the vibration. According to the linkage relationship in step S1, the measured value of the displacement sensor changes. Compare the actual measured displacement of the displacement sensor with the set vibration target value during processing. According to the specific difference, control the output of the electric cylinder to achieve the purpose of keeping the elastic airbag in a constant pressure state, effectively suppressing the vibration during processing while providing support for the workpiece; S4. Unload and pressure recovery after processing Adjust the pressure of the elastic airbag to a state less than the pressure of the elastic airbag during processing. The electric cylinder in the control system moves back, and the gas in the elastic airbag is pumped out through the variable-diameter air duct A to reduce the pressure of the elastic airbag. According to the linkage relationship in step S1, finally cause the measured value of the displacement sensor to change. Compare the actual measured displacement of the displacement sensor with the set target value after processing. According to the specific difference, control the output of the electric cylinder to achieve the elastic airbag maintaining a low-pressure state and prepare for the next processing.

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