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

Abstract

This invention discloses a smart vibration-damping workbench and vibration reduction method based on pressure-displacement conversion vibration detection. The vibration-damping workbench includes a base plate, an execution system, a lifting and fixing system, a control system, and a measurement system. The execution system performs adaptive vibration reduction; the lifting and fixing system is used to adjust the position of heavy workpiece blanks; the control system is used to control the support strength of the execution system; and the measurement system is used to detect and provide feedback on the vibration intensity of the execution system. The vibration reduction method includes pre-processing preparation, maintaining constant pressure in the execution system during processing, suppressing vibrations generated during processing, and unloading and pressure recovery steps after processing. This invention utilizes the ingenious conversion between air pressure and displacement, amplifies vibration changes through a linkage mechanism, and combines PID control principles to improve detection accuracy, control speed, and intelligence, ensuring effective support and vibration suppression for the processing of heavy workpiece blanks.

Description

Technical Field

[0001] This invention relates to the field of industrial machine tool processing, and in particular to a smart vibration reduction workbench and vibration reduction method based on pressure-displacement conversion vibration detection. Background Technology

[0002] Heavy workpieces are widely used in aerospace, energy, and shipbuilding industries, and their machining quality directly affects the stability and safety of such heavy equipment. Currently, CNC systems and cutting tools for machining heavy workpieces are highly intelligent and sophisticated. However, the worktables used for machining heavy workpieces remain relatively outdated, with low levels of intelligence and poor adaptability. Designing highly intelligent heavy workpiece machining worktables has become a crucial technology that must be mastered.

[0003] In the machining of heavy workpieces, significant vibrations are common, reducing machining efficiency and accuracy, causing rapid tool wear and breakage, and increasing production costs. Effectively suppressing vibrations during the machining of heavy workpieces and automating the adjustment of the machining table position for workpieces of different shapes are pressing technical challenges that need to be addressed in this field. Summary of the Invention

[0004] The technical problem to be solved by this invention is to provide a smart vibration reduction workbench and vibration reduction method based on pressure-displacement conversion vibration detection. It utilizes the ingenious conversion between air pressure and displacement, and amplifies the vibration changes with the help of a linkage mechanism. Combined with PID control mechanism, it improves detection accuracy, control speed and intelligence, and ensures that the processing of heavy workpiece blanks is effectively supported and vibration suppressed.

[0005] To achieve the above objectives, the technical solution adopted by this invention is as follows: a smart vibration reduction workbench based on pressure-displacement conversion vibration detection, comprising a base plate fixed to a machine tool, on which an execution system, a lifting and fixing system, a control system, and a measurement system are mounted; the upper surface of the execution system supports a heavy workpiece blank and performs adaptive vibration reduction during the processing of the heavy workpiece blank, and the vibration reduction method of the execution system is pneumatic vibration reduction; the lifting and fixing system is arranged in a circular array around the execution system, and is used to adjust the horizontal position and height of the heavy workpiece blank; the control system regulates the support strength of the execution system by converting displacement into air pressure changes, and the measurement system detects and provides feedback on the support strength of the execution system by converting air pressure changes into displacement; the control system determines the control strategy of the support strength based on the difference between the measured value and the preset value; the control system and the measurement system are arranged on the side of the execution system and staggered from the lifting and fixing system.

[0006] As a preferred embodiment 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 devices include an X-axis feed mechanism and a Y-axis feed mechanism horizontally mounted on the base plate. The Y-axis feed mechanism is equipped with a horizontal base, and a Z-axis feed mechanism is vertically mounted on the horizontal base. A T-shaped worktable is fixedly mounted on the Z-axis feed mechanism, and a clamping mechanism is mounted on the horizontal surface of the T-shaped worktable.

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

[0008] As a preferred embodiment of the present invention, the control system includes an electric cylinder, a pneumatic cylinder A driven by the electric cylinder, and a variable-diameter air guide pipe A whose thin end is connected to the output end of the pneumatic cylinder A. The thick end of the variable-diameter air guide pipe A is connected to the elastic airbag. The electric cylinder and the pneumatic cylinder A are fixed on the base plate by a column. The ratio of the diameter of the thin end to the diameter of the thick end of the variable-diameter air guide pipe A is 1:100. The pneumatic cylinder A is equipped with a return spring.

[0009] As a preferred embodiment of the present invention, the measuring system includes a variable-diameter air guide tube B connected to an elastic airbag at its thick end, a pneumatic cylinder B connected to the thin end of the variable-diameter air guide tube B, a four-bar linkage driven by the output end of the pneumatic cylinder B, a gear and rack mechanism driven by the four-bar linkage, and a displacement sensor mounted on the gear and rack mechanism. The gear and rack mechanism includes meshing gears and racks, with the rack vertically arranged and the displacement sensor mounted at the bottom of the rack. Both the variable-diameter air guide tube B and the pneumatic cylinder B are fixed to the base plate by columns. The four-bar linkage and the gear and rack mechanism are mounted on a testing frame, which is fixed to the base plate. The ratio of the diameter of the thin end to the diameter of the thick end of the variable-diameter air guide tube B is 1:100, and the pneumatic cylinder B has a return spring.

[0010] As a preferred embodiment of the present invention, the four-bar linkage is a swing guide rod mechanism with adjustable link length. The four-bar linkage includes a link, a link, a sliding sleeve, and a guide rod passing through the sliding sleeve, which are hinged in sequence. The guide rod is fixed on the gear, and the guide rod or its extension line passes through the center of the gear.

[0011] As a preferred embodiment of the present invention, the connecting rod includes a thick section and a thin section nested together. The thick section is welded with an adjusting rack parallel to the connecting rod, and the thin section is provided with a motor and an adjusting gear driven by the motor. The adjusting rack and the adjusting 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. Adjusting the length of the connecting rod: Estimate the weight of the heavy workpiece blank, start the motor in the measurement system to adjust the length of the connecting rod of the four-bar linkage to match the weight of the heavy workpiece blank.

[0015] S1-2, Pre-inflation: The electric cylinder in the start control system drives the pneumatic cylinder A to inflate the elastic airbag. Since the pneumatic cylinder B in the measurement system is connected to the elastic airbag, the pneumatic cylinder B outputs displacement due to the change in air pressure, which drives the four-bar linkage to move. Then the guide rod drives the gear to rotate, which drives the rack to generate displacement in the vertical direction. The distance between the displacement sensor and the fixed base plate is obtained and recorded as the actual measured distance value before processing. The difference between the actual measured distance value before processing and the set target distance value before processing is obtained. The output of the electric cylinder is adjusted according to the difference to keep the elastic airbag in a low pressure state.

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

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

[0018] After processing begins, the pressure of the elastic airbag is adjusted to be higher than the pressure before processing. The electric cylinder in the control system operates, inflating the elastic airbag through the pneumatic cylinder A, increasing the airbag pressure. Due to the pressure change, according to the linkage relationship in step S1, the distance between the displacement sensor and the fixed base plate is finally obtained and recorded as the actual measured distance value during processing. The difference between the actual measured distance value during processing and the set target distance value during processing is obtained. The output of the electric cylinder is adjusted according to the difference to maintain the elastic airbag at a constant pressure, ensuring basic stability during processing. S3: Suppress vibrations generated during processing.

[0019] Vibration occurs during the processing of heavy workpiece blanks. 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. The actual displacement measured by the displacement sensor is compared with the set vibration target value during processing. The output of the electric cylinder is controlled according to the specific difference to achieve the purpose of maintaining the elastic airbag at a constant pressure state, providing support for the workpiece while effectively suppressing vibration during processing.

[0020] S4. Unloading and pressure recovery after processing.

[0021] The pressure of the elastic airbag is adjusted to be lower than that during the processing. The electric cylinder in the control system pulls back, and the gas inside the elastic airbag is extracted through the variable diameter air pipe A, reducing the pressure of the elastic airbag. According to the linkage relationship of step S1, the displacement sensor measurement value changes. The actual displacement measured by the displacement sensor is compared with the set target value after processing. The output of the electric cylinder is controlled according to the specific difference, so that the elastic airbag is maintained in a low pressure state, preparing for the next processing.

[0022] The beneficial effects of adopting the above technical solution are as follows: This invention utilizes the ingenious conversion between air pressure and displacement, and amplifies vibration changes through a linkage mechanism. Combined with PID control principles, it improves detection accuracy, control speed, and intelligence, ensuring effective support and vibration suppression for heavy workpiece blanks during processing. Specifically, the lifting and fixing system can adjust the workpiece to be processed to a suitable position, reducing labor costs and improving automation and processing efficiency. The four-bar linkage mechanism transforms the pressure measurement problem within the elastic airbag into a rack displacement measurement problem. Simultaneously, the amplification function of the four-bar linkage system significantly improves pressure measurement accuracy. A small-range displacement sensor enables high-precision identification of vibrations during processing. A high-precision electric cylinder continuously inflates or deflates the airbag, maintaining it at a constant pressure state, providing effective support for heavy workpiece blanks during processing, significantly reducing processing vibration, and improving processing quality and efficiency. This invention uses pneumatic transmission, which ensures smooth movement and eliminates additional vibration interference during testing. At the same time, the workbench has a perfect structure, reasonable layout, strong adaptability, long service life, and high measurement accuracy. It solves the problems of difficulty in adjusting the processing position of heavy workpieces, difficulty in effectively suppressing processing vibration, and the limited application scenarios and poor universality of traditional workbench. It has good economic benefits and promotional value. Attached Figure Description

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

[0024] Figure 1 This is the overall structural isometric drawing of the intelligent vibration reduction workbench.

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

[0026] Figure 3 This is an isometric drawing of the structure of the intelligent vibration damping workbench after removing the workpiece and the lifting and fixing system.

[0027] Figure 4 This is a front view of the intelligent vibration damping workbench after removing the workpiece and the lifting and fixing system.

[0028] Figure 5 This is the structural isometric drawing of the intelligent vibration reduction workbench lifting and fixing system.

[0029] Figure 6 This is a front view of the intelligent vibration reduction workbench control system.

[0030] Figure 7 This is a front view of the intelligent vibration reduction workbench measurement system.

[0031] Figure 8 This is an isometric drawing of the four-bar linkage system of the intelligent vibration reduction workbench.

[0032] Figure 9 This is a flowchart of the vibration reduction method of the present invention.

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

[0034] See appendix Figure 1-9 The present invention relates to a smart vibration reduction workbench based on pressure-displacement conversion vibration detection, comprising a base plate 1 fixed to a machine tool. An execution system, a lifting and fixing system, a control system, and a measurement system are mounted on the base plate. The upper surface of the execution system supports a heavy workpiece blank and performs adaptive vibration reduction during the processing of the heavy workpiece blank. The vibration reduction method of the execution system is pneumatic vibration reduction. The lifting and fixing system is arranged in a circular array around the execution system and is used to adjust the horizontal position and height of the heavy workpiece blank. The control system regulates the support strength of the execution system by converting displacement into air pressure changes. The measurement system detects and provides feedback on the support strength of the execution system by converting air pressure changes into displacement. The control system determines the control strategy for the support strength based on the difference between the measured value and the preset value. The control system and the measurement system are arranged on the side of the execution system and staggered from the lifting and fixing system.

[0035] The lifting and fixing system includes four sets of three-axis cross-phase lifting and fixing devices. Each three-axis cross-phase lifting and fixing device includes an X-axis feed mechanism and a Y-axis feed mechanism horizontally mounted on a base plate. The Y-axis feed mechanism is equipped with a horizontal base, and a Z-axis feed mechanism is vertically mounted on the horizontal base. A T-shaped worktable is fixedly mounted on the Z-axis feed mechanism, and a clamping mechanism is mounted on the horizontal surface of the T-shaped worktable. The three-axis cross-phase lifting and fixing device has a complex structure and large size. To avoid clutter in the attached drawings and obscuring other components, two sets are omitted from the drawings, and only two sets are shown.

[0036] The execution system is a disc-shaped elastic airbag with both upper and lower surfaces being flat, and the elastic airbag is sandwiched between the base 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 guide tube A whose narrow end is connected to the output end of the pneumatic cylinder A. The thick end of the variable-diameter air guide tube A is connected to the elastic airbag. The electric cylinder and the pneumatic cylinder A are fixed on the base plate by a column. The ratio of the diameter of the narrow end to the diameter of the thick end of the variable-diameter air guide tube A is 1:100. The pneumatic cylinder A is equipped with a return spring.

[0038] The measurement system includes a variable-diameter air guide tube B connected to the elastic airbag at its thicker end, a pneumatic cylinder B connected to the thinner end of the variable-diameter air guide tube B, a four-bar linkage driven by the output end of the pneumatic cylinder B, a gear and rack mechanism driven by the four-bar linkage, and a displacement sensor mounted on the gear and rack mechanism. The gear and rack mechanism includes meshing gears and racks, with the rack vertically positioned and the displacement sensor mounted at the bottom of the rack. Both the variable-diameter air guide tube B and the pneumatic cylinder B are fixed to the base plate by columns. The four-bar linkage and the gear and rack mechanism are mounted on a testing frame, which is fixed to the base plate. The ratio of the diameter of the thinner end to the diameter of the thicker end of the variable-diameter air guide tube B is 1:100. The pneumatic cylinder B has a return spring.

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

[0040] The connecting rod includes nested thick and thin sections. The thick section is welded with an adjusting rack parallel to the connecting rod, and the thin section is equipped with a motor and an adjusting gear driven by the motor. The adjusting rack and the adjusting 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. Adjusting the length of the connecting rod: Estimate the weight of the heavy workpiece blank, start the motor in the measurement system to adjust the length of the connecting rod of the four-bar linkage to match the weight of the heavy workpiece blank.

[0044] S1-2, Pre-inflation: The electric cylinder in the start control system drives the pneumatic cylinder A to inflate the elastic airbag. Since the pneumatic cylinder B in the measurement system is connected to the elastic airbag, the pneumatic cylinder B outputs displacement due to the change in air pressure, which drives the four-bar linkage to move. Then the guide rod drives the gear to rotate, which drives the rack to generate displacement in the vertical direction. The distance between the displacement sensor and the fixed base plate is obtained and recorded as the actual measured distance value before processing. The difference between the actual measured distance value before processing and the set target distance value before processing is obtained. The output of the electric cylinder is adjusted according to the difference to keep the elastic airbag in a low pressure state.

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

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

[0047] After processing begins, the pressure of the elastic airbag is adjusted to be higher than the pressure before processing. The electric cylinder in the control system operates, inflating the elastic airbag through the pneumatic cylinder A, increasing the airbag pressure. Due to the pressure change, according to the linkage relationship in step S1, the distance between the displacement sensor and the fixed base plate is finally obtained and recorded as the actual measured distance value during processing. The difference between the actual measured distance value during processing and the set target distance value during processing is obtained. The output of the electric cylinder is adjusted according to the difference to maintain the elastic airbag at a constant pressure, ensuring basic stability during processing. S3: Suppress vibrations generated during processing.

[0048] Vibration occurs during the processing of heavy workpiece blanks. 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. The actual displacement measured by the displacement sensor is compared with the set vibration target value during processing. The output of the electric cylinder is controlled according to the specific difference to achieve the purpose of maintaining the elastic airbag at a constant pressure state, providing support for the workpiece while effectively suppressing vibration during processing.

[0049] S4. Unloading and pressure recovery after processing.

[0050] The pressure of the elastic airbag is adjusted to be lower than that during the processing. The electric cylinder in the control system pulls back, and the gas inside the elastic airbag is extracted through the variable diameter air pipe A, reducing the pressure of the elastic airbag. According to the linkage relationship of step S1, the displacement sensor measurement value changes. The actual displacement measured by the displacement sensor is compared with the set target value after processing. The output of the electric cylinder is controlled according to the specific difference, so that the elastic airbag is maintained in a low pressure state, preparing for the next processing.

[0051] The above description is only presented as a possible technical solution of the present invention and is not intended as a single limitation on the technical solution itself.

Claims

1. A smart vibration reduction workbench based on compressive-displacement conversion vibration detection, characterized in that: It includes a base plate fixed to the machine tool, on which the execution system, lifting and fixing system, control system and measuring system are mounted; The upper surface of the execution system supports the heavy workpiece blank and performs adaptive vibration reduction during the processing of the heavy workpiece blank. The vibration reduction method of the execution system is pneumatic vibration reduction. The execution system is a disc-shaped elastic airbag with both upper and lower surfaces being flat. The elastic airbag is sandwiched between the base plate and the heavy workpiece blank. The lifting and fixing system is arranged in a circular array around the execution system. The lifting and fixing system is used to adjust the horizontal position and height of heavy workpiece blanks. The control system regulates the support strength of the execution system by converting displacement into changes in air pressure, and the measurement system detects and provides feedback on the support strength of the execution system by converting changes in air pressure into displacement. The control system determines the support strength control strategy based on the difference between the measured value and the preset value; the control system includes an electric cylinder, a pneumatic cylinder A driven by the electric cylinder, and a variable diameter air guide tube A whose thin end is connected to the output end of the pneumatic cylinder A. The thick end of the variable diameter air guide tube A is connected to the elastic airbag. The electric cylinder and the pneumatic cylinder A are fixed on the base plate by a column. The ratio of the diameter of the thin end to the diameter of the thick end of the variable diameter air guide tube A is 1:

100. The pneumatic cylinder A is equipped with a return spring. The control system and measurement system are arranged on the side of the execution system and offset from the lifting and fixing system. The measurement system includes a variable-diameter air guide tube B connected to the elastic airbag at its thicker end, a pneumatic cylinder B connected to the thinner end of the variable-diameter air guide tube B, a four-bar linkage driven by the output end of the pneumatic cylinder B, a gear and rack mechanism driven by the four-bar linkage, and a displacement sensor mounted on the gear and rack mechanism. The gear and rack mechanism includes meshing gears and racks, with the rack vertically arranged and the displacement sensor mounted at the bottom of the rack. The variable-diameter air guide tube B and the pneumatic cylinder B are both fixed to the base plate by columns, and the four-bar linkage and the gear and rack mechanism are mounted on... On the testing frame, the testing frame is fixed to the base plate. The ratio of the diameter of the thin end to the diameter of the thick end of the variable diameter air pipe B is 1:

100. The pneumatic cylinder B is equipped with a return spring. The four-bar linkage is a swing guide rod mechanism with adjustable linkage length. The four-bar linkage includes a connecting rod, a connecting rod, a sliding sleeve, and a guide rod passing through the sliding sleeve in sequence. The guide rod is fixed to the gear, and the guide rod or its extension line passes through the center of the gear. The connecting rod includes a thick section and a thin section nested together. The thick section is welded with an adjusting rack parallel to the connecting rod. The thin section is equipped with a motor and an adjusting gear driven by the motor. The adjusting rack and the adjusting gear mesh with each other.

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

3. A method for vibration reduction using the intelligent vibration reduction workbench as described in claim 1 or 2, characterized in that... 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 to adjust the connecting rod of the four-bar linkage to a length that matches the weight of the heavy workpiece blank. S1-2, Pre-inflation: The electric cylinder in the start control system drives the pneumatic cylinder A to inflate the elastic airbag. Since the pneumatic cylinder B in the measurement system is connected to the elastic airbag, the pneumatic cylinder B outputs displacement due to the change in air pressure, which drives the four-bar linkage to move. Then the guide rod drives the gear to rotate, which drives the rack to generate displacement in the vertical direction. The distance between the displacement sensor and the fixed base plate is obtained and recorded as the actual measured distance value before processing. The difference between the actual measured distance value before processing and the set target distance value before processing is obtained. The output of the electric cylinder is adjusted according to the difference to keep the elastic airbag in a low pressure state. S1-3, Arranging 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 processing to begin; S2. During processing, the actuator maintains a constant pressure. After processing begins, the pressure of the elastic airbag is adjusted to be greater than the pressure before processing begins. The electric cylinder in the control system operates, inflating the elastic airbag through the pneumatic 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, the distance between the displacement sensor and the fixed base plate is finally obtained and recorded as the actual measured distance value during processing. The difference between the actual measured distance value during processing and the set target distance value during processing is obtained. The output of the electric cylinder is adjusted according to the difference to keep the elastic airbag in a constant pressure state and ensure the basic steady state during processing. S3, Suppress vibrations generated during processing Vibration occurs during the processing of heavy workpiece blanks. 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. The actual displacement measured by the displacement sensor is compared with the set vibration target value during processing. The output of the electric cylinder is controlled according to the specific difference to achieve the purpose of maintaining the elastic airbag at a constant pressure state, providing support for the workpiece while effectively suppressing vibration during processing. S4. Unloading and pressure recovery after processing. The pressure of the elastic airbag is adjusted to be lower than that during the processing. The electric cylinder in the control system pulls back, and the gas inside the elastic airbag is extracted through the variable diameter air pipe A, reducing the pressure of the elastic airbag. According to the linkage relationship of step S1, the displacement sensor measurement value changes. The actual displacement measured by the displacement sensor is compared with the set target value after processing. The output of the electric cylinder is controlled according to the specific difference, so that the elastic airbag is maintained in a low pressure state, preparing for the next processing.

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