3D seal punching device

Abstract

This invention relates to the field of sealing component punching technology, specifically a 3D sealing component punching device, including a punching frame and a movable sealing cover. The punching frame is internally equipped with a punching support unit and a punching adjustment unit. This invention uses a limit servo cylinder to push the movable limit frame downwards, causing the upper and lower support frames to form an upper and lower clamping support. At this time, a high-pressure air pump inside the metal frame inflates the rubber airbag. The airbag expands and compresses the internal granular filling layer. Utilizing the phase change effect generated by the dramatic increase in inter-particle friction, the originally loose and flowing granular layer instantly solidifies into a high-rigidity solid. The outer elastic film then tightly adheres to the complex curved surface of the 3D sealing component, solving the technical problem that traditional rigid clamps cannot adapt to irregular curved surfaces and are prone to damaging soft sealing surfaces. It achieves rapid switching from flexible wrapping positioning to rigid locking support, ensuring zero workpiece deformation and uniform distribution of support force at the bottom of the hole during the punching process.

Description

Technical Field

[0001] This invention relates to the field of sealing component punching technology, specifically a 3D sealing component punching device. Background Technology

[0002] In the field of existing sealing component processing technology, 3D seals are widely used in aerospace, automotive engines and precision hydraulic systems due to their complex three-dimensional curved surface structure and special elastic material properties.

[0003] Traditional sealing component punching processes often employ rigid molds combined with mechanical stamping, or use simple pneumatic clamps for fixing before drilling. However, existing technologies have significant drawbacks: First, due to the large curvature variations and soft material of 3D sealing components, traditional rigid clamps struggle to achieve omnidirectional fit and positioning, easily causing elastic deformation of the workpiece during clamping, leading to punching position misalignment or quality defects such as tearing and burrs around the hole opening; second, for sealing components with blind or deep hole structures, the waste generated during punching often gets stuck on the cutting edge or inside the cavity due to the high adhesion of rubber. Existing equipment lacks an effective automatic chip removal mechanism, usually requiring manual shutdown for cleaning, severely impacting the efficiency and automation level of continuous production; furthermore, highly elastic rubber materials have extremely high toughness at room temperature, requiring extremely high punching pressure in conventional punching methods, easily leading to large equipment vibrations, rapid tool wear, and difficulty in accurately controlling the depth of blind holes, failing to meet the manufacturing requirements of high-precision sealing components.

[0004] To address this, we propose a 3D-type sealing punching device. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a 3D-type sealing component punching device. A servo cylinder pushes a movable limiting frame downwards, causing the upper and lower support frames to clamp and support each other. Simultaneously, a high-pressure air pump within the metal frame inflates a rubber airbag. The airbag expands and compresses the internal granular filling layer. Utilizing the phase change effect generated by the increased friction between the particles, the originally loose and flowing granular layer instantly solidifies into a high-rigidity solid. The outer elastic film then tightly adheres to the complex curved surface of the 3D-type sealing component. This solves the technical problem that traditional rigid clamps cannot adapt to irregular curved surfaces and are prone to damaging soft sealing surfaces. It achieves a rapid switch from flexible wrapping and positioning to rigid locking support, ensuring zero workpiece deformation and uniform distribution of support force at the bottom of the hole during the punching process.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a 3D sealing component punching device, comprising a punching frame and a movable sealing cover. One side of the punching frame and one side of the movable sealing cover are hinged together, and folding support frames are movably provided between the two sides of the top of the punching frame and the two sides of the bottom of the movable sealing cover. A punching support unit is provided inside the punching frame to provide stable support for the 3D sealing component during punching, preventing deformation of the 3D sealing component during the punching process. A punching adjustment unit is also provided in the middle of the punching frame to adjust the punching position of the 3D sealing component. An industrial camera located in the middle of the movable sealing cover monitors the posture of the 3D sealing component within the punching frame in real time, thereby achieving automatic punching of the 3D sealing component. An automatic punching unit is provided inside the movable sealing cover to work with the punching support unit to automatically punch the 3D sealing component, while automatically recycling punching waste.

[0007] Preferably, the punching support unit includes a fixed frame, a lower support frame, and an upper support frame. The fixed frame is fixedly installed inside the punching machine frame, and the top of the fixed frame is provided with adjustment grooves around its four sides. A servo linear slide is fixedly installed inside each of the four adjustment grooves, and a connecting seat is slidably installed on the top of each of the four servo linear slides. A connecting sleeve is movably inserted into the top of each of the four connecting seats, and an electromagnet and a metal plate are respectively provided on the top of the connecting seat and inside the connecting sleeve.

[0008] Preferably, the top of the connecting sleeve is fixedly provided with a mounting bracket, the top of the mounting bracket is fixedly provided with a lower support bracket, one side of the mounting bracket is provided with a rotating bracket via a built-in micro motor, one side of the rotating bracket is provided with two movable sliding grooves, and movable limiting brackets are slidably provided inside the two movable sliding grooves. Two limiting servo electric cylinders are fixedly provided on one side of the rotating bracket, and the drive ends of the two limiting servo electric cylinders are fixedly connected to one side of the movable limiting bracket. Two upper support brackets are fixedly provided at the bottom of the movable limiting bracket.

[0009] Preferably, both the lower support frame and the upper support frame are composed of a metal frame, a rubber airbag, a particle filling layer, and an elastomer film. The top of the metal frame is fixedly provided with a rubber airbag, and the top of the rubber airbag is fixedly provided with an elastomer film. The interior of the rubber airbag is also filled with a particle filling layer. The interior of the metal frame is provided with a high-pressure air pump, and the output end of the high-pressure air pump is connected to the interior of the rubber airbag.

[0010] Preferably, the punching adjustment unit includes a rotary table and a connecting frame. The rotary table is rotatably mounted in the middle of the top of the fixed frame, and a lifting servo cylinder is fixedly mounted on the top of the rotary table. The connecting frame is fixedly mounted on the top of the drive shaft of the lifting servo cylinder, and the connecting frame is threadedly connected to the four sides of the connecting frame. The driving ends of the four adaptable servo cylinders are all fixedly mounted with a bonding block, and a rubber suction cup is fixedly mounted on one side of the bonding block.

[0011] Preferably, the automatic punching unit includes a punching frame and a punching cutter head. Servo linear slides are fixedly provided around the inside of the movable closed cover, and mounting blocks are slidably provided at the bottom of each of the four servo linear slides. A punching frame is fixedly provided at the bottom of each of the four mounting blocks, and a punching cutter head is slidably provided inside the punching frame.

[0012] Preferably, punching servo electric cylinders are fixedly installed on both sides inside the punching frame, and the driving ends of the two punching servo electric cylinders are fixedly connected to the two sides of the top of the punching head, respectively. Punching grooves that slide with the punching head are provided on both sides of the inner wall of the punching frame.

[0013] Preferably, the bottom of the punching frame is also fixedly provided with a punching positioning block, and the punching positioning block, the lower support frame, and the upper support frame adopt the same structural design.

[0014] Preferably, an auxiliary servo electric cylinder is fixedly provided on one side inside the mounting block, and a punching auxiliary block is fixedly provided on the driving end of the auxiliary servo electric cylinder. Several air blowing holes are provided on the outer side of the bottom of the punching auxiliary block, and a guide pipe is fixedly provided on one side of the top of the punching auxiliary block. The other end of the guide pipe is connected to a liquid nitrogen delivery pipe, and the bottom end of the guide pipe is connected to the interior of several air blowing holes. Several adsorption holes are also provided in the middle of the bottom of the punching auxiliary block, and a vacuum pump connected to the interior of several adsorption holes is provided inside the punching auxiliary block.

[0015] Preferably, a waste collection rack is fixedly provided on one side of the punching frame, and a collection frame is provided in the lower drawer type inside the waste collection rack; a collection servo electric cylinder is fixedly provided on the upper part inside the waste collection rack, and an electric gripper is fixedly provided on the drive end of the collection servo electric cylinder.

[0016] Compared with existing technologies, it has the following advantages:

[0017] 1. The movable limit frame is pushed down by the limit servo electric cylinder, so that the upper support frame and the lower support frame form an upper and lower clamping support. At this time, the high-pressure air pump in the metal frame inflates the rubber air bag. The air bag expands and squeezes the internal particle filling layer. The phase change effect generated by the increase in friction between particles makes the originally loose and flowing particle layer instantly solidify into a high-rigidity solid. The outer elastic film then tightly fits the complex curved surface of the 3D seal. This solves the technical problem that traditional rigid clamps cannot adapt to irregular curved surfaces and are prone to damaging soft sealing surfaces. It realizes the rapid switching from flexible wrapping positioning to rigid locking support, ensuring zero deformation of the workpiece and uniform distribution of the support force at the bottom of the hole during the punching process.

[0018] 2. The connecting frame is driven to rise to the inner cavity of the 3D type seal by the lifting servo electric cylinder. The four adapter servo electric cylinders independently drive the bonding blocks to extend and retract radially, so that the rubber suction cup with vacuum adsorption holes tightly adheres to the inner wall of the workpiece and establishes negative pressure adsorption. After the external upper and lower support frames are released, the rotary table drives the entire adsorption assembly to perform horizontal rotation. At the same time, the adapter servo electric cylinders can finely adjust the extension length of each bonding block to change the eccentricity of the workpiece relative to the punching center.

[0019] 3. The punching frame is quickly positioned to the target coordinates by a servo linear slide driven by two actuators. The auxiliary servo electric cylinder first drives the hollow punching auxiliary block to descend through the center of the punching head to the workpiece surface. The liquid nitrogen delivery pipe sprays low-temperature nitrogen gas through the blowing hole into the processing area through the material guide pipe, causing the rubber to become locally brittle. Then, the punching servo electric cylinder drives the sharp punching head to descend for tear-free precision cutting and accurately control the depth of the blind hole. After the processing is completed, the punching auxiliary block descends again. The vacuum pump at its bottom generates negative pressure through the adsorption hole to directly suck out and lift the cylindrical waste material stuck in the cutting edge or hole. The material collection servo electric cylinder drives the electric gripper to pick up the waste material at the preset position and put it into the collection frame. This solves the problem of waste material sticking and getting stuck in the punching process of high elastic rubber. The principle of thermodynamic phase change is used to reduce cutting resistance and improve the cutting quality.

[0020] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a 3D-type sealing punching device structure according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the fixing frame and connecting frame structure according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the lower support frame and upper support frame structure according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the mounting frame and rotating frame structure according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the rubber airbag and particle filling layer structure according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the automatic punching unit structure according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the punching frame and punching head structure according to an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the punching auxiliary block structure according to an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the waste collection rack and material collection frame structure according to an embodiment of the present invention.

[0030] In the diagram, 1. Punching frame; 2. Movable closing cover; 3. Folding support frame; 4. Punching support unit; 5. Punching adjustment unit; 6. Automatic punching unit; 7. Fixing frame; 8. Adjusting slide; 9. Servo linear slide; 10. Connecting seat; 11. Mounting frame; 12. Connecting sleeve; 13. Lower support frame; 14. Rotating frame; 15. Movable limit frame; 16. Movable slide; 17. Upper support frame; 18. Limiting servo electric cylinder; 19. Metal frame; 20. Rubber airbag; 21. Granule filling layer; 22. 1. Elastomer film; 23. Rotary table; 24. Lifting servo cylinder; 25. Connecting frame; 26. Adaptor servo cylinder; 27. Bonding block; 28. Servo linear slide II; 29. ​​Mounting block; 30. Punching frame; 31. Punching cutter head; 32. Punching servo cylinder; 33. Punching positioning block; 34. Auxiliary servo cylinder; 35. Punching auxiliary block; 36. Air blowing hole; 37. Adsorption hole; 38. Guide tube; 39. Waste collection rack; 40. Collection frame; 41. Collection servo cylinder; 42. Electric gripper. Detailed Implementation

[0031] 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.

[0032] Example 1

[0033] Please see Figures 1 to 9 As shown, a 3D type sealing punching device includes: a punching frame 1 and a movable sealing cover 2. One side of the punching frame 1 is hinged to one side of the movable sealing cover 2, and folding support frames 3 are movably provided between the two sides of the top of the punching frame 1 and the two sides of the bottom of the movable sealing cover 2. The folding support frames 3 extend after the movable sealing cover 2 is opened, and the movable part of the folding support frame 3 adopts a transition fit to provide a stable support force for the unfolding of the movable sealing cover 2.

[0034] Furthermore, the punching frame 1 is equipped with a punching support unit 4 to provide stable support for the 3D seal during punching, preventing deformation of the 3D seal during the punching process. A punching adjustment unit 5 is also located in the middle of the punching frame 1 to adjust the punching position of the 3D seal. This, combined with an industrial camera located in the middle of the movable sealing cover 2, monitors the posture of the 3D seal within the punching frame 1 in real time, thus enabling automatic punching of the 3D seal without manual adjustment. After the 3D seal is placed inside the punching frame 1, multiple holes on the 3D seal can be punched. The movable sealing cover 2 is equipped with an automatic punching unit 6, which works with the punching support unit 4 to automatically punch the 3D seal and automatically recycles punching waste, ensuring that it does not affect continuous punching operations.

[0035] Specifically, the punching support unit 4 includes a fixed frame 7, a lower support frame 13, and an upper support frame 17. The fixed frame 7 is fixedly installed inside the punching machine frame 1, and the top of the fixed frame 7 is provided with adjustment grooves 8 around its four sides. A servo linear slide table 9 is fixedly installed inside each of the four adjustment grooves 8, and a connecting seat 10 is slidably installed on the top of each of the four servo linear slide tables 9. A connecting sleeve 12 is movably inserted into the top of each of the four connecting seats 10, and an electromagnet and a metal plate are respectively provided on the top of the connecting seat 10 and the interior of the connecting sleeve 12. After the connecting sleeve 12 and the connecting seat 10 are inserted, the connection stability between the connecting seat 10 and the connecting sleeve 12 is further improved by the electromagnet and the metal plate.

[0036] Furthermore, a mounting bracket 11 is fixedly provided on the top of the connecting sleeve 12, and a lower support bracket 13 is fixedly provided on the top of the mounting bracket 11. A rotating bracket 14 is provided on one side of the mounting bracket 11 via a built-in micro motor. Two movable slide grooves 16 are provided on one side of the rotating bracket 14, and movable limit brackets 15 are slidably provided inside the two movable slide grooves 16. Two limit servo cylinders 18 are fixedly provided on one side of the rotating bracket 14, and the drive ends of the two limit servo cylinders 18 are fixedly connected to one side of the movable limit bracket 15. Two upper support brackets 17 are fixedly provided at the bottom of the movable limit bracket 15, and a U-shaped through groove is provided in the middle of the movable limit bracket 15 for punching the 3D seal.

[0037] It should be noted that before punching the 3D seal, the 3D seal needs to be machined and positioned. Select a suitable mounting bracket 11 for supporting the 3D seal according to its shape. Connect the selected mounting bracket 11 with the connecting sleeve 12 and the connecting seat 10. Then, control the rotating frame 14 to rotate to a horizontal state. According to the size specifications of the 3D seal, use the servo linear slide 9 to adjust the position of the mounting bracket 11 so that the punching position of the 3D seal can be placed above the lower support bracket 13. Then control the rotating frame 14 to reset so that the upper support bracket 17 is directly above the 3D seal. Driven by the limit servo cylinder 18, the movable limit bracket 15 moves closer to the upper end of the 3D seal. Use the two upper support brackets 17 in conjunction with the lower support bracket 13 to flexibly support and position the punching area of ​​the 3D seal above and below.

[0038] Furthermore, both the lower support frame 13 and the upper support frame 17 are composed of a metal frame 19, a rubber airbag 20, a particle filling layer 21, and an elastomer film 22. The top of the metal frame 19 is fixedly provided with a rubber airbag 20, and the top of the rubber airbag 20 is fixedly provided with an elastomer film 22. The inside of the rubber airbag 20 is also filled with a particle filling layer 21. The inside of the metal frame 19 is provided with a high-pressure air pump, and the output end of the high-pressure air pump is connected to the inside of the rubber airbag 20. The metal frame 19 is used to support the structure of the rubber airbag 20 and is also used to connect with the mounting frame 11 and the rotating frame 14.

[0039] It should be noted that the limit servo cylinder 18 drives the movable limit frame 15 to move the upper support frame 17 downward, which together with the fixed lower support frame 13 forms upper and lower support for the punched area of ​​the 3D seal. At this time, the elastomer film 22, as the direct contact interface, first adheres to the complex concave and convex surface of the 3D seal with extremely low contact stress, using the material's own flexibility to fill the micro gaps to avoid surface damage. Then, the high-pressure air pump inside the metal frame 19 starts and injects high-pressure gas into the rubber airbag 20. The radial expansion of the rubber airbag 20 applies a huge isotropic extrusion force to the internally filled particle filling layer 21, forcing the originally loose flow The dynamic micron-sized particles tightly pack together and generate extremely high internal friction, triggering a rigid phase transition from a fluid state to a solid state. This causes the upper and lower support frames to instantly transform from a soft, encased state into high-rigidity solid support blocks. This structure not only perfectly replicates the three-dimensional geometric contour of the 3D seal to achieve zero-gap adaptive positioning, but also provides a reverse support reference sufficient to resist thousands of Newtons of shear force during punching. This effectively eliminates elastic deformation or indentation caused by uneven stress on soft materials, ensuring the flatness and perpendicularity of the hole bottom plane when the punch edge performs precision cutting at a preset depth. While achieving flexible shape adaptation, it also provides rigid load resistance.

[0040] It should also be noted that the particle filling layer 21 is composed of a large number of discretely distributed rigid microspheres or irregular particles. The preferred material is high-hardness, low-wear-rate silica glass microspheres, alumina ceramic powder, or surface-hardened steel shot. The particle size is strictly controlled between 0.05 mm and 0.5 mm to ensure excellent flowability in a loose state, allowing it to fill the tiny depressions on the curved surface of the sealing element. Simultaneously, it forms a dense accumulation structure under pressure. The particle surface can be roughened or coated with a high-friction coefficient coating to increase the static friction limit between particles. The particle filling layer 21 is filled in the sealed cavity inside the rubber airbag 20 in a free-stacking form, with a filling density controlled at 60% to 75% of the volume, leaving sufficient clearance. The porosity allows for relative displacement and rearrangement of particles during inflation and extrusion. When the rubber airbag 20 is inflated by high-pressure gas, the airbag wall applies uniform confining pressure to the particle filling layer 21, forcing a sharp increase in the number of contact points between particles and generating huge normal pressure. This triggers a macroscopic blocking phase change effect, causing the entire filling layer to instantly transform from a fluid-like state to a solid-like state with high elastic modulus and high shear strength. Its equivalent stiffness after curing increases nonlinearly with the increase of internal pressure of the airbag, thus providing adjustable rigid support reaction force for the 3D seal above. After the airbag is depressurized, the normal pressure between particles disappears, the friction decreases sharply, and the filling layer immediately returns to a loose flow state to release the workpiece. This process is completely reversible and the response time is in the millisecond range.

[0041] Specifically, four servo linear slides 9 drive the connecting seat 10 to move within the adjusting slide groove 8, thereby coarsely adjusting the horizontal position of the mounting frame 11 and the lower support frame 13. Then, the rotating frame 14, driven by a micro motor, flips, causing the movable limit frame 15 and the upper support frame 17 to cover the workpiece. The limit servo cylinder 18 pushes the movable limit frame 15 downwards, causing the upper support frame 17 and the lower support frame 13 to form an upper and lower clamping support. At this time, the high-pressure air pump inside the metal frame 19 inflates the rubber airbag 20, causing the airbag to expand and compress the internal granular filling layer 21, utilizing... The phase change effect caused by the surge in interparticle friction instantly solidifies the originally loose and flowing particle layer into a high-rigidity entity. The outer elastic film 22 then tightly adheres to the complex curved surface of the 3D seal, solving the technical problem that traditional rigid clamps cannot adapt to irregular curved surfaces and are prone to damaging soft sealing surfaces. It realizes a rapid switch from flexible wrapping positioning to rigid locking support, ensuring zero deformation of the workpiece and uniform distribution of the support force at the bottom of the hole during the punching process. At the same time, the cooperation between the electromagnet and the metal sheet enhances the connection rigidity of the quick-change mounting bracket 11, ensuring repeatability of positioning accuracy during multi-station switching.

[0042] Example 2

[0043] Specifically, the punching adjustment unit 5 includes a rotary table 23 and a connecting frame 25. The rotary table 23 is rotatably mounted in the middle of the top of the fixed frame 7, and a lifting servo cylinder 24 is fixedly mounted on the top of the rotary table 23. The connecting frame 25 is fixedly mounted on the top of the drive shaft of the lifting servo cylinder 24, and the connecting frame 25 is threadedly connected to the four sides of the connecting frame 25. The driving ends of the four adaptable servo cylinders 26 are all fixedly mounted with a bonding block 27, and a rubber suction cup is fixedly mounted on one side of the bonding block 27. The rubber suction cup has several vacuum adsorption holes inside, and the bonding block 27 has a miniature air pump that communicates with several vacuum adsorption holes inside.

[0044] It should be noted that when adjusting the processing area of ​​the 3D seal, the connecting frame 25 is moved upward by the drive end of the lifting servo cylinder 24 until several bonding blocks 27 are on the same horizontal plane of the inner surface of the 3D seal. The bonding blocks 27 and the inner surface of the 3D seal are adsorbed and bonded by the drive ends of the four adapter servo cylinders 26. The rotating table 23 drives the connecting frame 25 to rotate, and the processing position of the 3D seal is adjusted. During the adjustment, the upper and lower flexible limits of the 3D seal are released.

[0045] Specifically, the lifting servo cylinder 24 drives the connecting frame 25 to rise into the inner cavity of the 3D seal. Four adapter servo cylinders 26 independently drive the bonding blocks 27 to extend and retract radially, so that the rubber suction cup with vacuum adsorption holes tightly adheres to the inner wall of the workpiece and establishes negative pressure adsorption. After the external upper and lower support frames are released, the rotary table 23 drives the entire adsorption assembly to rotate horizontally. At the same time, the adapter servo cylinders 26 can finely adjust the extension length of each bonding block 27 to change the eccentricity of the workpiece relative to the punching center. The industrial camera captures the feature points of the workpiece in real time and feeds them back to the control system to form a closed-loop adjustment. This breaks through the limitation of traditional external clamping that cannot adjust the internal feature angle of the workpiece. By using the inner hole of the workpiece itself as a positioning reference, high-precision automatic centering and angle correction are achieved. It is particularly suitable for complex 3D seals with asymmetrical or spirally distributed holes, eliminating the time cost of repeated manual trial and error adjustment of the orientation. Combined with visual monitoring, it realizes fully automated continuous processing, which greatly improves the cumulative accuracy and production efficiency of multi-hole processing.

[0046] Example 3

[0047] Specifically, the automatic punching unit 6 includes a punching frame 30 and a punching cutter head 31. Servo linear slides 28 are fixedly installed around the four sides of the interior of the movable closed cover 2, and mounting blocks 29 are slidably installed at the bottom of each of the four servo linear slides 28. The punching frame 30 is fixedly installed at the bottom of each of the four mounting blocks 29, and the punching cutter head 31 is slidably installed inside the punching frame 30. Punching servo electric cylinders 32 are fixedly installed on both sides inside the punching frame 30, and the drive ends of the two punching servo electric cylinders 32 are... The punch head 31 is fixedly connected to both sides of the top. Both sides of the inner wall of the punching frame 30 are provided with punching grooves that slide with the punch head 31. The punch head 31 is controlled to slide downward by the drive end of the two punching servo electric cylinders 32, so that the cutting edge of the punch head 31 slides to the bottom of the punching frame 30. The punch head 31 is used to complete the punching process of the 3D seal. The punching depth of the 3D seal is precisely controlled by controlling the stroke of the drive end of the punching servo electric cylinder 32.

[0048] Furthermore, a punching positioning block 33 is fixedly provided at the bottom of the punching frame 30. The punching positioning block 33, the lower support frame 13, and the upper support frame 17 adopt the same structural design. The punching positioning block 33 is used to pre-position the punching area of ​​the 3D seal, ensuring the accuracy of the punching position of the 3D seal. An auxiliary servo cylinder 34 is fixedly provided on one side inside the mounting block 29, and a punching auxiliary block 35 is fixedly provided at the drive end of the auxiliary servo cylinder 34. Several air blowing holes 36 are provided on the outer side of the bottom of the punching auxiliary block 35, and a guide tube 38 is fixedly provided on one side of the top of the punching auxiliary block 35. The other end of the guide tube 38 is connected to a liquid nitrogen delivery tube, and the bottom end of the guide tube 38 is connected to the interior of several air blowing holes 36. The punching auxiliary block 35 is controlled by the drive end of the auxiliary servo cylinder 34 to pass through the interior of the punching cutter head 31, so that the punching auxiliary block 35 is positioned above the 3D seal. Above the processing area, liquid nitrogen is blown toward the punching processing area through several air blowing holes 36, making the 3D seal quickly brittle, so that the punching head 31 can punch the 3D seal. The bottom center of the punching auxiliary block 35 is also provided with several adsorption holes 37, and the inside of the punching auxiliary block 35 is provided with a vacuum pump that communicates with the inside of the adsorption holes 37. After the punching of the 3D seal is completed, the top surface of the punching waste is adsorbed through the adsorption holes 37 at the bottom of the punching auxiliary block 35, and then the punching waste is taken out from the inside of the 3D seal.

[0049] Furthermore, a waste collection rack 39 is fixedly provided on one side of the punching rack 30, and a collection frame 40 is provided in a drawer-like manner inside the waste collection rack 39; a collection servo cylinder 41 is fixedly provided on the upper part of the waste collection rack 39, and an electric gripper 42 is fixedly provided on the drive end of the collection servo cylinder 41; wherein, the upper part of the waste collection rack 39 is connected to the interior of the punching rack 30. After the punching waste is taken out from the interior of the 3D type seal by the punching auxiliary block 35, the punching waste is lifted to one side of the electric gripper 42 by the drive end of the auxiliary servo cylinder 34 in conjunction with the punching auxiliary block 35. The electric gripper 42 is controlled by the drive end of the collection servo cylinder 41 to clamp the punching waste. Then, the drive end of the collection servo cylinder 41 is controlled to reset, and the punching waste clamped on the electric gripper 42 is transferred to the interior of the collection frame 40 for storage.

[0050] Specifically, the servo linear slide 28 drives the punching frame 30 to quickly position itself to the target coordinates. The auxiliary servo electric cylinder 34 first drives the hollow punching auxiliary block 35 to descend through the center of the punching head 31 to the workpiece surface. The liquid nitrogen delivery pipe sprays low-temperature nitrogen gas through the guide pipe 38 and the blowing hole 36 into the processing area, causing the rubber to become locally brittle. Then, the punching servo electric cylinder 32 drives the sharp punching head 31 to descend for tear-free precision cutting and accurately control the depth of the blind hole. After processing, the punching auxiliary block 35 descends again, and the vacuum pump at its bottom generates negative pressure through the suction hole 37 to trap the cutting edge or the hole. The cylindrical waste material is directly sucked out and lifted. The collecting servo cylinder 41 drives the electric gripper 42 to pick up the waste material at the preset position and put it into the collecting frame 40. This solves the problem of waste material sticking and getting stuck in the punching process of high elastic rubber. The principle of thermodynamic phase change is used to reduce cutting resistance and improve the cutting quality. At the same time, the chip removal strategy of combining non-contact airflow pre-cooling and contact vacuum suction is adopted to avoid the problem of waste material splashing and contaminating the sealing surface caused by high pressure blowing. It realizes the automated closed-loop control from material modification, automatic punching to waste material collection, which greatly improves the punching effect of 3D seals.

[0051] Example 4

[0052] Specifically, this embodiment discloses a punching method for a 3D type sealing punching device, including the following steps:

[0053] Step 1: According to the geometry and size specifications of the 3D seal to be processed, the operator selects the appropriate mounting bracket 11 from the spare parts library. The metal plate at the bottom of the connecting sleeve 12 and the electromagnet at the top of the connecting seat 10 attract each other, and the mounting bracket 11 is quickly and stably installed on the connecting seat 10 driven by four servo linear slides 9.

[0054] Step 2: The control system starts the built-in micro motor of the rotating frame 14, drives the rotating frame 14 to rotate to a horizontal state, and then the four servo linear slides 9 move synchronously, driving the mounting frame 11 and the lower support frame 13 to move in the adjusting slide 8 until the center position of the lower support frame 13 is precisely aligned with the preset initial punching coordinate point.

[0055] Step 3: Place the 3D type seal above the lower support frame 13. The control system drives the micro motor again to reset the rotating frame 14 to the vertical working position. At this time, the upper support frame 17 is located directly above the seal. The limit servo cylinder 18 extends and pushes the movable limit frame 15 downward, so that the upper support frame 17 and the lower support frame 13 gently contact the punched area surface of the seal from the upper and lower sides respectively.

[0056] Step 4: The high-pressure air pump inside the metal frame 19 is started and high-pressure gas is injected into the rubber airbag 20. The airbag expands and squeezes the internal particle filling layer 21, triggering the blocking phase change effect, so that the upper support frame 17 and the lower support frame 13 instantly solidify from a flexible wrapped state into a high-rigidity entity, thereby firmly locking the 3D seal in the predetermined position and maintaining its original curved shape without deformation.

[0057] Step 5: The lifting servo cylinder 24 drives the connecting frame 25 to rise, so that the surrounding bonding blocks 27 extend into the inner cavity of the seal. The matching servo cylinder 26 pushes the bonding blocks 27 to expand radially until the rubber suction cup is tightly attached to the inner wall of the seal. Then, the locking state of the external support frame is released. The rotary table 23, in conjunction with the visual feedback data of the industrial camera, drives the connecting frame 25 to rotate, and adjusts the angle of the seal so that the target hole position is coaxial with the punching center.

[0058] Step 6: After the posture adjustment is completed, the external support frame is inflated and locked again to fix the workpiece. The servo linear slide 28 drives the punching frame 30 to move directly above the target hole. The auxiliary servo electric cylinder 34 first drives the punching auxiliary block 35 to pass through the center of the punching head 31 and descend to a preset distance from the workpiece surface.

[0059] Step 7: The liquid nitrogen delivery pipe delivers low-temperature nitrogen gas to the blowing hole 36 through the material guide pipe 38, which locally sprays and cools the area of ​​the seal to be punched, causing the material to become brittle rapidly. Then, the punching servo electric cylinder 32 drives the punching cutter head 31 to descend at high speed, using the sharpness of the blade to complete the precision punching operation without tearing in the brittle area and accurately control the punching depth.

[0060] Step 8: After the punching head 31 moves upward and resets, the punching auxiliary block 35 moves downward again and approaches the cut. Its internal vacuum pump starts and generates negative pressure through the bottom suction hole 37 to firmly suck up the cylindrical waste material stuck on the cutting edge or remaining in the hole and lift it to a safe height together with the punching auxiliary block 35.

[0061] Step 9: The collecting servo cylinder 41 drives the electric gripper 42 to move to the side of the punching auxiliary block 35 to pick up the adsorbed punching waste. Then the collecting servo cylinder 41 resets and transfers the waste to the collecting frame 40 below the waste collection rack 39 for centralized storage.

[0062] Step 10: If it is necessary to continue processing other holes on the same workpiece, repeat the local adjustment and punching process from Step 5 to Step 9. If all holes on the current workpiece have been processed, the airbag of the support frame is depressurized and returns to a flexible state. The limit servo cylinder 18 drives the upper support frame 17 to rise. The operator takes out the finished product and puts in the next workpiece to be processed, realizing continuous automated production.

[0063] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A 3D type sealing punching device, comprising a punching frame (1) and a movable sealing cover (2), wherein one side of the punching frame (1) is hinged to one side of the movable sealing cover (2) by a hinge, and folding support frames (3) are movably provided between the two sides of the top of the punching frame (1) and the two sides of the bottom of the movable sealing cover (2), characterized in that, The punching frame (1) is equipped with a punching support unit (4) inside; the punching frame (1) is also equipped with a punching adjustment unit (5) in the middle of the middle, which is used to adjust the punching position of the 3D seal. The industrial camera set in the middle of the movable sealing cover (2) monitors the posture of the 3D seal in the punching frame (1) in real time, thereby realizing the automatic punching of the 3D seal. The movable sealing cover (2) is equipped with an automatic punching unit (6) inside, which is used to cooperate with the punching support unit (4) to complete the automatic punching of the 3D seal, and at the same time automatically recycle the punching waste.

2. The 3D sealing punching device according to claim 1, characterized in that, The punching support unit (4) includes a fixed frame (7), a lower support frame (13) and an upper support frame (17). The fixed frame (7) is fixedly installed inside the punching machine frame (1), and the top of the fixed frame (7) is provided with adjustment grooves (8) around the four sides. The four adjustment grooves (8) are fixedly installed with servo linear slides (9), and the top of the four servo linear slides (9) is slidably provided with connecting seats (10). The top of the four connecting seats (10) is movably inserted with connecting sleeves (12), and the top of the connecting seat (10) and the inside of the connecting sleeve (12) are respectively provided with an electromagnet and a metal plate.

3. The 3D sealing punching device according to claim 2, characterized in that, The top of the connecting sleeve (12) is fixedly provided with a mounting bracket (11), and the top of the mounting bracket (11) is fixedly provided with a lower support bracket (13). One side of the mounting bracket (11) is provided with a rotating bracket (14) via a built-in micro motor. One side of the rotating bracket (14) is provided with two movable slide grooves (16), and the interior of the two movable slide grooves (16) is provided with a movable limit bracket (15). One side of the rotating bracket (14) is fixedly provided with two limit servo cylinders (18), and the driving ends of the two limit servo cylinders (18) are fixedly connected to one side of the movable limit bracket (15). The bottom of the movable limit bracket (15) is fixedly provided with two upper support brackets (17).

4. The 3D sealing punching device according to claim 3, characterized in that, The lower support frame (13) and the upper support frame (17) are both composed of a metal frame (19), a rubber airbag (20), a particle filling layer (21), and an elastomer film (22). The top of the metal frame (19) is fixedly provided with a rubber airbag (20), and the top of the rubber airbag (20) is fixedly provided with an elastomer film (22). The inside of the rubber airbag (20) is also filled with a particle filling layer (21). The inside of the metal frame (19) is provided with a high-pressure air pump, and the output end of the high-pressure air pump is connected to the inside of the rubber airbag (20).

5. A 3D sealing punching device according to claim 4, characterized in that, The punching adjustment unit (5) includes a rotating table (23) and a connecting frame (25). The rotating table (23) is rotatably mounted on the middle of the top of the fixed frame (7), and a lifting servo cylinder (24) is fixedly mounted on the top of the rotating table (23). The connecting frame (25) is fixedly mounted on the top of the drive shaft of the lifting servo cylinder (24), and the connecting frame (25) is threaded around its perimeter. Adaptive servo cylinders (26) are threadedly connected to the drive ends of the four adaptive servo cylinders (26). Adhesive blocks (27) are fixedly mounted on the drive ends of the four adaptive servo cylinders (26), and a rubber suction cup is fixedly mounted on one side of the adhesive block (27).

6. The 3D sealing punching device according to claim 5, characterized in that, The automatic punching unit (6) includes a punching frame (30) and a punching head (31). The four sides of the inside of the movable closed cover (2) are all fixedly provided with servo linear slides (28), and the bottom of each of the four servo linear slides (28) is slidably provided with mounting blocks (29). The bottom of each of the four mounting blocks (29) is fixedly provided with a punching frame (30), and the punching head (31) is slidably provided inside the punching frame (30).

7. A 3D sealing punching device according to claim 6, characterized in that, Both sides of the punching frame (30) are fixedly provided with punching servo electric cylinders (32), and the driving ends of the two punching servo electric cylinders (32) are fixedly connected to the top sides of the punching cutter head (31). Both sides of the inner wall of the punching frame (30) are provided with punching grooves that slide with the punching cutter head (31).

8. A 3D sealing punching device according to claim 7, characterized in that, The bottom of the punching frame (30) is also fixedly provided with a punching positioning block (33), and the punching positioning block (33), the lower support frame (13), and the upper support frame (17) have the same structure.

9. A 3D type sealing punching device according to claim 8, characterized in that, An auxiliary servo cylinder (34) is fixedly provided on one side inside the mounting block (29), and a punching auxiliary block (35) is fixedly provided at the driving end of the auxiliary servo cylinder (34). Several air blowing holes (36) are provided on the outer side of the bottom of the punching auxiliary block (35), and a guide pipe (38) is fixedly provided on one side of the top of the punching auxiliary block (35). The other end of the guide pipe (38) is connected to a liquid nitrogen delivery pipe, and the bottom end of the guide pipe (38) is connected to the interior of several air blowing holes (36). Several adsorption holes (37) are also provided in the middle of the bottom of the punching auxiliary block (35), and a vacuum pump connected to the interior of several adsorption holes (37) is provided inside the punching auxiliary block (35).

10. A 3D type sealing punching device according to claim 9, characterized in that, A waste collection rack (39) is fixedly provided on one side of the punching rack (30), and a collection frame (40) is provided in the lower drawer of the waste collection rack (39); a collection servo cylinder (41) is fixedly provided in the upper part of the waste collection rack (39), and an electric gripper (42) is fixedly provided at the drive end of the collection servo cylinder (41).

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