A high-precision anti-warping clamping device for thin plate parts based on negative pressure adsorption

Abstract

The application discloses a kind of high-precision warping prevention clamping equipment of sheet part based on negative pressure adsorption, belong to the technical field of machine equipment.It includes adsorption platform, is provided with several adsorption holes on adsorption platform, and airflow chamber is arranged in adsorption platform;Plug is installed in adsorption hole, second filter screen is rotatably installed on plug, and torsional spring is installed in the rotary joint of second filter screen;Several adjusting frames are slidably installed on adsorption platform, several locating plates are installed on adjusting frame, threaded rod is rotatably installed on adjusting frame, and threaded rod is threadedly connected with adsorption platform.The plug is inserted into adsorption hole, and the inclined groove of guiding block can be inserted into the locating plate of adjusting frame, so that the plug is forced to drop to the limit position, the top of plug is slightly lower than the mouth part of adsorption hole, the plug is prevented from being damaged by knocking during workpiece clamping process, and the stability of plug after installation is improved when reverse pressure cleaning is prevented from being separated from adsorption hole by pressure.

Description

Technical Field

[0001] This invention relates to the field of machining equipment technology, and more specifically, to a high-precision anti-warping clamping device for thin plate parts based on negative pressure adsorption. Background Technology

[0002] In the machining process, clamping is the core step in ensuring that the workpiece occupies the correct machining position relative to the machine tool and cutting tool and remains stable. Its accuracy and efficiency directly determine the final machining quality and production cycle of the parts. Currently, with the rapid growth in demand for lightweight structures in aerospace, new energy vehicles, and electronic information fields, the application scale of thin-plate parts with small wall thickness continues to expand. These parts have structural characteristics of weak rigidity and easy deformation, posing a severe challenge to traditional clamping technology.

[0003] For the clamping requirements of thin sheet metal parts, existing processing scenarios mostly employ manual mechanical clamping solutions. Parts are secured by manually adjusting the clamping force using tools such as vises, clamping bolts, and specialized fixtures. The clamping process relies on the operator's experience to adjust the clamping force; uneven clamping point distribution or excessive clamping force can easily cause localized warping, indentation, or even plastic deformation of the parts. Furthermore, manual clamping requires a large clamping edge, which limits the processing range of the parts and necessitates repeated adjustments to the clamping position during multi-station processing. A single changeover can take tens of minutes, resulting in low production efficiency. Additionally, irregularly shaped parts require customized fixtures, leading to high fixture costs in small-batch, multi-variety production scenarios. Therefore, this paper proposes a high-precision anti-warping clamping device for thin sheet metal parts based on negative pressure adsorption. Summary of the Invention

[0004] The purpose of this invention is to provide a high-precision anti-warping clamping device for thin plate parts based on negative pressure adsorption, which solves the technical problems of workpiece deformation and low clamping efficiency in manual mechanical clamping in the prior art.

[0005] This invention provides a high-precision anti-warping clamping device for thin plate parts based on negative pressure adsorption, including an adsorption platform with a plurality of adsorption holes. An airflow chamber communicating with the adsorption holes is provided inside the adsorption platform. The airflow chamber is connected to a pressurizing device and a negative pressure device through a connecting pipe. A plug is installed in the adsorption hole, and a second filter screen is rotatably installed on the plug. A torsion spring is installed at the rotatable connection of the second filter screen. Several adjusting frames are slidably installed on the adsorption platform, several positioning plates are installed on the adjusting frames, and threaded rods are rotatably installed on the adjusting frames, with the threaded rods threadedly connected to the adsorption platform. Rotating the threaded rod drives the positioning plate on the adjusting frame to insert into the plug, fixing the plug in the suction hole.

[0006] As a further description of the above technical solution, the plug includes an upper tube and a lower tube that are interconnected. The upper tube is adapted to the adsorption hole and is fitted with several sealing rings. A support ring and a guide block are installed on the lower tube. An inclined groove is opened on the guide block. A ball is connected to the first elastic element installed in the lower tube.

[0007] As a further description of the above technical solution, the outer diameter of the sphere is larger than the inner diameter of the lower tube and smaller than the inner diameter of the upper tube.

[0008] As a further description of the above technical solution, it also includes a transmission assembly, which includes a push rod that is slidably connected to the upper tube body. A positioning rod is installed on the push rod, which is inserted into the positioning hole of the second filter screen to limit the rotation of the second filter screen. A second elastic element connected to the upper tube body is fitted on the push rod.

[0009] As a further description of the above technical solution, a support frame is installed inside the upper tube, an adjusting column is slidably installed on the support frame, the adjusting column is above the sphere, a first wedge is installed on the adjusting column, and a third elastic element connected to the support frame is installed on the adjusting column.

[0010] As a further description of the above technical solution, a first filter screen is installed at the bottom of the lower tube.

[0011] As a further description of the above technical solution, the adjusting frame is equipped with a number of second wedges, and each plug has a positioning plate and a second wedge distributed on both sides, and a sealing ring is fitted on the head of the threaded rod.

[0012] As a further description of the above technical solution, the second filter screen is rotatably connected to the upper tube body, and the axis of the positioning hole opened on the second filter screen intersects with the rotation axis of the second filter screen.

[0013] As a further description of the above technical solution, it also includes an adjustment table, with the adsorption platform installed at the output end of the adjustment table.

[0014] As a further description of the above technical solution, a partition is installed in the airflow chamber, which divides the airflow chamber into two airflow compartments. The two airflow compartments are connected to a connecting pipe through independent branch pipes. A booster nozzle and a negative pressure nozzle are connected and installed on the connecting pipe. Both the booster nozzle and the negative pressure nozzle are equipped with regulating valves, and a control valve is installed on the connecting pipe.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. After the plug is inserted into the adsorption hole, the positioning plate of the adjusting frame can be inserted into the inclined groove of the guide block to force the plug to descend to the limit position, so that the top of the plug is slightly lower than the opening of the adsorption hole, avoiding the plug from being bumped and damaged during the workpiece clamping process. At the same time, it can prevent the plug from being dislodged from the adsorption hole by pressure during reverse pressure cleaning, thus improving the stability of the plug after installation.

[0016] 2. This invention uses a second filter screen to cover the tube opening of the plug head, and with the limiting structure of the positioning rod and positioning hole, it can prevent cutting waste from falling into the inside of the plug head during processing. At the same time, it avoids airflow disturbance causing the filter screen to open accidentally, effectively preventing waste from entering the air passage and causing blockage, and reducing potential malfunctions during equipment operation.

[0017] 3. Under pressurized cleaning conditions, the high-pressure airflow can sequentially push the ball upward and the adjusting column to move. Through the transmission cooperation between the first wedge and the top rod, the rotation limit of the second filter screen is automatically released, and the second filter screen can be rotated open, simultaneously realizing the automatic blowing out of the residue inside the plug. There is no need for manual disassembly and cleaning of each hole, which greatly reduces the manpower input for daily maintenance of the equipment. After cleaning, each component can be automatically reset, and the equipment can quickly return to the standby state. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a high-precision anti-warping clamping device for thin plate parts disclosed in a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the adsorption platform structure of a high-precision anti-warping clamping device for thin plate parts disclosed in a preferred embodiment of the present invention; Figure 3 This is a cross-sectional view of the adsorption platform of a high-precision anti-warping clamping device for thin plate parts disclosed in a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of the installation position of the adjustment frame of the high-precision anti-warping clamping device for thin plate parts disclosed in a preferred embodiment of the present invention; Figure 5 This is a schematic diagram of the plug structure of a high-precision anti-warping clamping device for thin plate parts disclosed in a preferred embodiment of the present invention; Figure 6 This is a cross-sectional view of the plug head of a high-precision anti-warping clamping device for thin plate parts disclosed in a preferred embodiment of the present invention; Figure 7 This is a schematic diagram of the plug part structure of a high-precision anti-warping clamping device for thin plate parts disclosed in a preferred embodiment of the present invention; Figure 8 A preferred embodiment of the present invention discloses a high-precision anti-warping clamping device for thin plate parts. Figure 7 Enlarged view of point A in the middle; Figure 9A preferred embodiment of the present invention discloses a high-precision anti-warping clamping device for thin plate parts. Figure 4 Enlarged view at point B in the middle; Figure 10 A preferred embodiment of the present invention discloses a high-precision anti-warping clamping device for thin plate parts. Figure 6 Enlarged view at point C; Figure 11 This is a schematic diagram of the transmission component structure of a high-precision anti-warping clamping device for thin plate parts disclosed in a preferred embodiment of the present invention; Figure 12 This is a schematic diagram of the adjustment frame structure of a high-precision anti-warping clamping device for thin plate parts disclosed in a preferred embodiment of the present invention; Figure 13 A preferred embodiment of the present invention discloses a high-precision anti-warping clamping device for thin plate parts. Figure 4 Enlarged view of point D in the middle.

[0019] Explanation of the numbers in the diagram: 1. Adsorption platform; 2. Adjustment platform; 11. Adsorption hole; 12. Airflow chamber; 13. Through hole; 14. Limiting groove; 15. Partition plate; 16. Connecting pipe; 17. Booster nozzle; 18. Negative pressure nozzle; 19. Adjusting valve; 120. Control valve; 121. Support pipe; 3. Plug; 31. Upper pipe body; 32. Lower pipe body; 310. First sealing ring; 33. Support ring; 34. Guide block; 35. Inclined groove; 36. First filter 37. First elastic element; 38. Sphere; 39. Support frame; 391. Adjustment hole; 4. Second filter screen; 41. Support shaft; 42. Positioning hole; 5. Transmission assembly; 51. Top rod; 52. Connecting plate; 53. Positioning rod; 54. Second elastic element; 6. Adjustment column; 61. First wedge; 62. Third elastic element; 63. Limiting plate; 7. Adjustment frame; 71. Positioning plate; 72. Second wedge; 73. Threaded rod; 74. Second sealing ring. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Reference Figures 1 to 13This embodiment discloses a high-precision anti-warping clamping device for thin plate parts based on negative pressure adsorption, including an adsorption platform 1 and an adjustment table 2. The adsorption platform 1 is installed on the output end of the adjustment table 2 by fasteners. When the output end of the adjustment table 2 moves, the machining coordinates of the adsorption platform 1 are adjusted. The adsorption platform 1 is provided with a plurality of adsorption holes 11. An airflow chamber 12 is provided inside the adsorption platform 1. The airflow chamber 12 and the adsorption holes 11 are connected through through holes 13 at the bottom of the adsorption holes 11. A limit groove 14 is provided in the through hole 13. A partition 15 is fixedly installed in the airflow chamber 12, dividing the airflow chamber 12 into two airflow compartments, so that the airflow can be controlled separately. The two airflow compartments are respectively connected to a connecting pipe 16 through independent branch pipes. A booster nozzle 17 and a negative pressure nozzle 18 are connected and installed on the connecting pipe 16. The booster nozzle 17 is connected to the booster device, which can supply high-pressure gas to the airflow chamber 12 through the connecting pipe 16. The negative pressure nozzle 18 is connected to the negative pressure device. When the negative pressure device is working, it can extract the air from the airflow chamber 12, so that the adsorption platform 1 is under negative pressure. Both the booster nozzle 17 and the negative pressure nozzle 18 are equipped with regulating valves 19 to control the opening or closing of the corresponding nozzles. The connecting pipe 16 is equipped with a control valve 120, which is located between the two connecting nodes of the connecting pipe 16 and the airflow chamber. When the control valve 120 is closed, only a single airflow chamber is in working condition. When the control valve 120 is open, both airflow chambers are in working condition. Several support pipes 121 are fixedly installed on one side of the adsorption platform 1. The support pipes 121 correspond to the adsorption holes 11 in the same row.

[0022] Reference Figure 3 , Figures 5 to 9 A plug 3 is installed inside the adsorption hole 11. The plug 3 includes an upper tube 31 and a lower tube 32 that are connected to each other. The upper tube 31 is located directly above the lower tube 32. The upper tube 31 and the lower tube 32 are coaxial, and the inner diameter of the upper tube 31 is larger than the inner diameter of the lower tube 32. The outer diameter of the upper tube 31 is adapted to the inner diameter of the adsorption hole 11, and the outer diameter of the lower tube 32 is adapted to the inner diameter of the through hole 13. Several first sealing rings 310 are fitted on the upper tube 31. When the lower tube 32 and the upper tube 31 are inserted into the adsorption hole 11, they are sealed by the first sealing rings 310, thereby reducing the risk of gas leakage.

[0023] A support ring 33 and a guide block 34 are fixedly installed on the outer side of the lower tube body 32. After the lower tube body 32 is inserted into the through hole 13, it is axially limited by the support ring 33, and the guide block 34 is inserted into the limiting groove 14 to limit the circumferential movement of the lower tube body 32. An inclined groove 35 is provided on the guide block 34. A first filter screen 36 is installed at the bottom of the lower tube body 32. A first elastic element 37 is installed inside the lower tube body 32. One end of the first elastic element 37 is connected to the bottom of the lower tube body 32, and a ball 38 is fixedly installed at the other end. The ball 38 is used to support the ball 38 in a suspended state inside the upper tube 31. The outer diameter of the ball 38 is larger than the inner diameter of the lower tube 32. Under negative pressure, the ball 38 compresses the first elastic element 37 downward until it blocks the opening of the lower tube 32, thereby blocking the communication between the upper tube 31 and the lower tube 32. A support frame 39 is fixedly installed inside the upper tube 31. An adjustment hole 391 is opened on the support frame 39. When the pressurized gas blows the ball 38 upward, the support frame 39 can limit the ball 38 and prevent the first elastic element 37 from being overstretched.

[0024] Reference Figure 2 , Figure 5 , Figure 10 The clamping device also includes a second filter screen 4 installed at the opening of the upper tube 31. The mesh count of the first filter screen 36 is greater than that of the second filter screen 4. The second filter screen 4 is rotatably connected to the upper tube 31 via a support shaft 41. A torsion spring is mounted on the support shaft 41. One end of the torsion spring is connected to the upper tube 31, and the other end is connected to the second filter screen 4. The torsion spring is used to keep the second filter screen 4 covering the opening of the upper tube 31, reducing the risk of cutting waste entering the plug 3. When the pressure is increased into the plug 3, the gas can blow the second filter screen 4 upward, thereby opening the end of the upper tube 31 and blowing out the cutting residue that has fallen into the plug 3, thus cleaning the plug 3. The rotating part of the second filter screen 4 is arc-shaped, and a positioning hole 42 is provided on the second filter screen 4. The axis of the positioning hole 42 intersects with the axis of the support shaft 41.

[0025] Reference Figures 8 to 11 A transmission assembly 5 is installed on the plug head 3. The transmission assembly 5 includes a push rod 51, which is slidably connected to the upper tube body 31. The push rod 51 is inserted into the adjustment hole 391 of the support frame 39. A connecting plate 52 is fixedly installed at the end of the push rod 51. A positioning rod 53 is fixedly installed on the connecting plate 52. The positioning rod 53 can be inserted into the positioning hole 42 of the second filter screen 4 for limiting the rotation of the second filter screen 4. A second elastic element 54 is fitted on the push rod 51. One end of the second elastic element 54 is fixedly connected to the connecting plate 52, and the other end is fixedly connected to the upper tube body 31. The second elastic element 54 is used to drive the push rod 51 to move towards the adjustment hole 391, thereby assisting the positioning rod 53 to be stably inserted into the positioning hole 42.

[0026] An adjusting column 6 is slidably mounted on the support frame 39. The adjusting column 6 is coaxial with the upper tube body 31. A first wedge block 61 is fixedly mounted on the adjusting column 6. When the first wedge block 61 moves upward, it can be inserted into the adjusting hole 391 and push the top rod 51 to move away from the adjusting hole 391, so that the positioning rod 53 is disengaged from the positioning hole 42, thereby releasing the rotation limit of the second filter screen 4. A third elastic element 62 and a limiting plate 63 are mounted on the adjusting column 6. One end of the third elastic element 62 is fixedly connected to the adjusting column 6, and the other end is fixedly connected to the support frame 39. The third elastic element 62 is used to drive the adjusting column 6 to move downward until the limiting plate 63 abuts against the support frame 39 and is limited.

[0027] Reference Figure 3 , Figure 4 , Figure 12 and Figure 13 Several adjusting frames 7 are installed on the adsorption platform 1. The adjusting frames 7 are slidably connected to the adsorption platform 1. Several positioning plates 71 and several second wedges 72 are fixedly installed on the adjusting frames 7. Positioning plates 71 and second wedges 72 are distributed on both sides of each plug 3. The plug 3 is inserted into the adsorption hole 11. A threaded rod 73 is rotatably installed at the end of the adjusting frame 7. The threaded rod 73 is threadedly connected to the adsorption platform 1. The threaded rod 73 includes a head and a threaded part. The outer diameter of the head of the threaded rod 73 is adapted to the inner diameter of the support tube 121. A second sealing ring 74 is sleeved on the head of the threaded rod 73 to reduce the risk of air leakage at the support tube 121. After the plug 3 is inserted into the adsorption hole 11, the positioning plate 71 on the adjusting frame 7 can be moved towards the plug 3 by rotating the threaded rod 73. The positioning plate 71 is inserted into the inclined groove 35, forcing the plug 3 to continue to descend until the support ring 33 reaches the limit position, thus completing the positioning of the plug 3. At this time, the top of the plug 3 is slightly lower than the opening of the adsorption hole 11, which avoids damage to the plug 3 when the workpiece is clamped. After the positioning plate 71 is fully inserted into the inclined groove 35, it can also prevent the plug 3 from falling out of the adsorption hole 11 under pressure when cleaning the cutting slag by reverse pressure, thus improving the stability of the plug 3 after installation. When the second wedge 72 moves towards the plug 3, the second wedge 72 will abut against the bottom of the lower tube 32 and push the lower tube 32 upward, thereby assisting several plugs 3 in the same row to be taken out from the adsorption hole 11 at the same time, reducing the difficulty of disassembly and maintenance.

[0028] Working principle: First, enter the thin plate clamping stage, close the regulating valve 19 of the booster nozzle 17, open the regulating valve 19 of the negative pressure nozzle 18, and after the thin plate workpiece to be processed is placed on the adsorption platform 1, start the negative pressure equipment to extract the air in the airflow chamber 12, so that the airflow chamber forms a negative pressure.

[0029] If there is no workpiece covering the corresponding adsorption hole 11, outside air continuously flows in from the top of the plug 3 under negative pressure. The high-speed airflow directly impacts the ball 38, causing the ball 38 to compress the first elastic element 37 downwards until the upper opening of the lower tube 32 is completely blocked. After the blockage, the air passage is disconnected, the airflow of the plug 3 stops, and the ball 38 remains in a blocked state under the action of the pressure difference between the upper and lower parts, realizing the automatic sealing of the non-working adsorption hole 11, avoiding negative pressure leakage, ensuring the stability of the adsorption force of the other adsorption holes 11 covered by workpieces, and eliminating the problem of insufficient local adsorption force caused by air leakage in the traditional adsorption platform 1 from the root.

[0030] If a workpiece covers the area above the corresponding adsorption hole 11, the opening of the adsorption hole 11 is blocked by the workpiece, and the external airflow cannot enter the plug 3 under negative pressure. As a result, the ball 38 cannot compress the first elastic element 37, and the upper tube 31 and the lower tube 32 remain in communication. The upper tube 31 acts on the bottom of the part to tightly adsorb the workpiece onto the platform surface.

[0031] The dual-flow chamber can switch working modes via control valve 120: when control valve 120 is closed, the adsorption force of a single side area can be controlled independently; when it is open, the entire platform can adsorb synchronously, adapting to the clamping requirements of thin plates of different sizes and materials. The adsorption force distribution can be flexibly adjusted according to the rigidity of the parts to avoid excessive local adsorption force causing warping and deformation of the parts, and to ensure that the clamping flatness meets the requirements of high-precision machining.

[0032] During processing, the second filter screen 4 always covers the opening of the upper tube 31, preventing cutting waste from falling into the plug head 3. The positioning rod 53 is inserted into the positioning hole 42 to restrict the rotation of the second filter screen 4, preventing airflow disturbance during processing from causing the second filter screen 4 to open, ensuring sealing reliability, and also preventing waste from entering the air passage and causing blockage, reducing the risk of failure during equipment operation. After processing is completed, the negative pressure air nozzle 18 is closed, the negative pressure suction is interrupted, and the formed workpiece can be removed.

[0033] During manual cleaning, the surface of the adsorption platform 1 can be cleaned by manually holding the cleaning gun. The second filter screen 4 is in a limited state by the positioning rod 53, and the cutting waste cannot enter the plug head 3. During backflushing cleaning, the regulating valve 19 on the booster nozzle 17 is opened and the regulating valve 19 on the negative pressure nozzle 18 is closed. The booster device introduces high-pressure gas into the airflow chamber 12 through the booster nozzle 17. The high-pressure gas enters the plug head 3 from the lower tube 32 and impacts the bottom of the ball 38, pushing the ball 38 to stretch the first elastic element 37 and move it upward. After the ball 38 moves upward to contact the bottom of the regulating column 6, it continues to push the regulating column 6 to overcome the elastic force of the third elastic element 62. The first wedge 61 moves upward, inserts into the adjusting hole 391, and pushes the top rod 51 outward, causing the positioning rod 53 to disengage from the positioning hole 42. This releases the rotation limit of the second filter screen 4, and the high-pressure airflow blows the second filter screen 4 upward to rotate and open the opening of the upper tube 31, blowing out the cutting residue that has fallen into the plug head 3 with the airflow. This completes the automatic cleaning of the plug head 3, eliminating the need for manual disassembly and cleaning of each hole, and significantly reducing the labor cost of equipment maintenance. After cleaning, the booster nozzle 17 is closed, the second filter screen 4 is reset by the torsion spring force, the adjusting column 6 is reset by the tension of the third elastic element 62, and the positioning rod 53 is reinserted into the positioning hole 42. The equipment can then quickly return to the standby state.

[0034] When the plug 3 needs to be replaced or maintained, the threaded rod 73 is rotated to move the adjusting frame 7 toward the plug 3. The positioning plate 71 first releases the limit on the plug 3. At this time, the second wedge 72 is not in contact with the lower tube 32. The threaded rod 73 is rotated again, and the second wedge 72 abuts against the bottom of the lower tube 32 and pushes the lower tube 32 upward. All plugs 3 in the same row can be pushed out at the same time without disassembling them one by one. This further reduces the maintenance difficulty after long-term operation of the equipment and improves the operation and maintenance efficiency.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-precision anti-warping clamping device for thin plate parts based on negative pressure adsorption, characterized in that: The device includes an adsorption platform (1), which has several adsorption holes (11). An airflow chamber (12) communicating with the adsorption holes (11) is provided inside the adsorption platform (1). The airflow chamber (12) is connected to a booster device and a negative pressure device through a connecting pipe (16). A plug (3) is installed inside the adsorption hole (11). A second filter screen (4) is rotatably installed on the plug (3). A torsion spring is installed at the rotatable connection of the second filter screen (4). Several adjustment frames (7) are slidably installed on the adsorption platform (1), several positioning plates (71) are installed on the adjustment frames (7), and threaded rods (73) are rotatably installed on the adjustment frames (7), and the threaded rods (73) are threadedly connected to the adsorption platform (1). Rotate the threaded rod (73) to drive the positioning plate (71) on the adjusting frame (7) to be inserted into the plug (3), and fix the plug (3) in the adsorption hole (11).

2. The high-precision anti-warping clamping device for thin plate parts based on negative pressure adsorption according to claim 1, characterized in that: The plug (3) includes an upper tube (31) and a lower tube (32) that are connected to each other. The upper tube (31) is adapted to the adsorption hole (11). Several sealing rings are fitted on the upper tube (31). A support ring (33) and a guide block (34) are installed on the lower tube (32). An inclined groove (35) is opened on the guide block (34). A ball (38) is connected to the first elastic element (37) installed in the lower tube (32).

3. The high-precision anti-warping clamping device for thin plate parts based on negative pressure adsorption according to claim 2, characterized in that: The outer diameter of the sphere (38) is greater than the inner diameter of the lower tube (32) and smaller than the inner diameter of the upper tube (31).

4. The high-precision anti-warping clamping device for thin plate parts based on negative pressure adsorption according to claim 2, characterized in that: It also includes a transmission assembly (5), which includes a push rod (51) that is slidably connected to the upper tube body (31). A positioning rod (53) is installed on the push rod (51), and the positioning rod (53) is inserted into the positioning hole (42) of the second filter screen (4) to limit the rotation of the second filter screen (4). A second elastic element (54) connected to the upper tube body (31) is fitted on the push rod (51).

5. The high-precision anti-warping clamping device for thin plate parts based on negative pressure adsorption according to claim 4, characterized in that: A support frame (39) is installed inside the upper tube (31). An adjusting column (6) is slidably installed on the support frame (39). The adjusting column (6) is above the sphere (38). A first wedge (61) is installed on the adjusting column (6). A third elastic element (62) connected to the support frame (39) is installed on the adjusting column (6).

6. The high-precision anti-warping clamping device for thin plate parts based on negative pressure adsorption according to claim 2, characterized in that: The bottom of the lower tube (32) is equipped with a first filter screen (36).

7. The high-precision anti-warping clamping device for thin plate parts based on negative pressure adsorption according to claim 1, characterized in that: The adjusting frame (7) is equipped with several second wedges (72), and each plug (3) has a positioning plate (71) and a second wedge (72) distributed on both sides. The head of the threaded rod (73) is fitted with a sealing ring.

8. The high-precision anti-warping clamping device for thin plate parts based on negative pressure adsorption according to claim 2, characterized in that: The second filter screen (4) is rotatably connected to the upper tube body (31), and the axis of the positioning hole (42) opened on the second filter screen (4) intersects with the rotation axis of the second filter screen (4).

9. The high-precision anti-warping clamping device for thin plate parts based on negative pressure adsorption according to any one of claims 1-8, characterized in that: It also includes a regulating platform (2), and an adsorption platform (1) is installed at the output end of the regulating platform (2).

10. The high-precision anti-warping clamping device for thin plate parts based on negative pressure adsorption according to any one of claims 1-8, characterized in that: The airflow chamber (12) is equipped with a partition (15), which divides the airflow chamber (12) into two airflow compartments. The two airflow compartments are connected to the connecting pipe (16) through independent branch pipes. A booster nozzle (17) and a negative pressure nozzle (18) are connected and installed on the connecting pipe (16). A regulating valve (19) is provided on both the booster nozzle (17) and the negative pressure nozzle (18). A control valve (120) is provided on the connecting pipe (16).

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