Quick clamping type clamp for aluminum alloy precision forgings

Abstract

The invention discloses a quick clamping type clamp for aluminum alloy precision forgings, and relates to the technical field of clamps, the quick clamping type clamp comprises a positioning plate, a bottom plate and a plurality of cushion columns, the positioning plate is mounted above the bottom plate through the cushion columns, a clamping groove is formed in the positioning plate, and a plurality of clamping pins and auxiliary supporting pins are arranged in the clamping groove. A pair of hinge blocks and a pulling mechanism are arranged on the same side of the positioning plate and the bottom plate, a transmission mechanism is arranged below the positioning plate and connected between the pulling mechanism and the clamping pin, when the pressing rod is pulled, the magnetic disc rotates, induction current and damping torque are generated in the copper anvil disc, the springback speed of the pressing rod is effectively reduced, mechanical damage is avoided, and the service life of the pressing rod is prolonged. The transmission mechanism can be of a spring inhaul cable structure or a hydraulic structure, synchronous deflection of the clamping pins is achieved, the clamping force can be changed in a stepless mode by adjusting the position of a nut, and the aluminum alloy precision forge piece clamping device is rapid in clamping, safe to operate, controllable in clamping force and suitable for efficient machining of aluminum alloy precision forge pieces.

Description

Technical Field

[0001] This invention relates to the field of fixture technology, specifically a quick-clamping fixture for precision forging of aluminum alloy parts. Background Technology

[0002] Existing forging fixtures, such as the cutting fixture for forging disclosed in patent CN221640790U, include an operating table, an adjustment assembly, and a rotating assembly. The rotating assembly has a turntable, gears, a rack, and a first telescopic rod. A clamping assembly is provided on the upper surface of the turntable. This fixture drives the rack to rotate, which in turn drives the gears, causing the turntable to rotate and thus achieving rotational reversal of the workpiece, avoiding manual adjustment of the workpiece. However, this fixture has shortcomings in practical applications.

[0003] Firstly, its clamping assembly mainly consists of a clamping plate sleeved on the second threaded shaft and a fixing component driven by the second telescopic rod. The clamping method is limited, providing only simple radial or axial pressure to the workpiece. It cannot adjust the clamping force according to the workpiece's shape or material properties, easily leading to workpiece loosening due to insufficient clamping force or surface damage to precision forgings due to excessive clamping force. Secondly, the fixture lacks safety protection design. If the clamping force is suddenly released when releasing the workpiece, the operator's hand is easily injured by the rapidly returning mechanism, posing a mechanical injury hazard.

[0004] To address the aforementioned problems, this invention provides a clamping fixture for aluminum alloy precision forgings that features rapid clamping, adjustable clamping force, and safety damping function, thereby overcoming the shortcomings of existing technologies. Summary of the Invention

[0005] The purpose of this invention is to provide a quick-clamping fixture for precision forging of aluminum alloy parts, so as to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a quick-clamping fixture for aluminum alloy precision forgings, comprising a positioning plate, a base plate, and several pads. The positioning plate is mounted on the base plate via the several pads. A clamping groove is provided on the positioning plate, and several clamping pins and several auxiliary support pins are provided in the clamping groove. The clamping pins are rotatably connected to the positioning plate. A pair of hinge blocks and a levering mechanism are provided on the same side of the positioning plate and the base plate. A transmission mechanism is provided below the positioning plate, and the transmission mechanism is connected between the levering mechanism and the several clamping pins. The actuating mechanism includes a spool and a pressure rod. The spool is rotatably mounted between a pair of hinge blocks. The pressure rod is connected to one side of the spool. A driving bevel gear is provided on the side of the spool away from the pressure rod. A driven bevel gear and a copper anvil are rotatably mounted in one of the hinge blocks. The driven bevel gear meshes with the driving bevel gear. A magnetic disk is coaxially connected to the bottom of the driven bevel gear. The copper anvil is located below the magnetic disk.

[0007] Furthermore, the transmission mechanism includes a number of levers equal to the number of clamping pins. The levers are connected to the bottom of the clamping pins and are located between the positioning plate and the base plate. A stop bar is installed on one side of each lever at the bottom of the positioning plate, and a return spring connects the stop bar to the lever. The operator first places the aluminum alloy forging to be clamped stably in the clamping slot on the positioning plate. The auxiliary support pin provides auxiliary positioning. Under the tension of the return spring, the levers adhere to the stop bars. At this time, the clamping pins are in an initial, unbiased, released state, and the winding cable is in a slack state.

[0008] Furthermore, the transmission mechanism includes several connecting cables, several clamping springs, and several coiled cables. The end of each lever away from the clamping pin is tied to a connecting cable, one end of each clamping spring is tied to a connecting cable, and the other end of each clamping spring is tied to a coiled cable. The end of each coiled cable away from the clamping spring is wound around a reel. The operator manually grips and operates the lever, causing the reel to rotate between a pair of hinge blocks. The coiled cable wound on the reel is gradually wound up, tightening the clamping springs and connecting cables, transmitting tension to each lever. The lever overcomes the resistance of the return spring and deflects, causing the clamping pin to rotate synchronously within the clamping groove.

[0009] Furthermore, several guide rollers are provided between the positioning plate and the base plate, and these guide rollers reverse the direction of the coiled cable. As the pressure rod continues to move, the head of the clamping pin gradually presses against the side wall of the aluminum alloy forging until reliable clamping is achieved. The guide rollers constrain and reverse the direction of the coiled cable, ensuring smooth force transmission and avoiding frictional interference between the coiled cable and the positioning plate or base plate.

[0010] As the pressure lever is actuated, the driving bevel gear at the end of the spool rotates, and the driven bevel gear meshing with it accelerates. The magnetic disk at the bottom of the driven bevel gear begins to rotate. Since the copper anvil is fixed inside the hinge block and maintains a small gap with the magnetic disk, the alternating magnetic field of the magnetic disk induces eddy currents in the copper anvil. The induced magnetic field generated by these eddy currents interacts with the original magnetic field, forming a braking torque that opposes the rotation of the magnetic disk. This torque is transmitted in the opposite direction to the spool through the driven bevel gear, causing rotational damping when the pressure lever is actuated. This improves the smoothness and controllability of the clamping action. The shank bolt can be slidably inserted into the bolt hole at the end of the pressure lever to lock the pressure lever in the working state and prevent accidental loosening.

[0011] When it is necessary to loosen the forging, the operator reverses the lever, and the stretched clamping spring releases its elastic potential energy, generating a rebound force that quickly pulls the lever, connecting cable, coil, and reel back to their initial positions. The damping system composed of the magnetic disk and the copper anvil also plays a role when the lever rotates in the reverse direction, effectively slowing down the rotation speed of the reel and allowing the lever to return to its initial position smoothly and safely. This prevents the lever from swinging violently back under the spring force, which could cause impact or crushing injuries to the operator's hands, thus providing a safety protection function.

[0012] Furthermore, the transmission mechanism includes a transmission gear, a rack, and a first piston. The transmission gear and rack are located in a hinge block near the pressure rod. The transmission gear is installed on the side of the reel near the pressure rod, and the rack is slidably installed in the hinge block. A first oil chamber is provided in the hinge block, and the first piston is slidably installed in the first oil chamber. The first piston is connected to the rack, and the rack meshes with the transmission gear. The operator first places the aluminum alloy precision forging to be clamped stably in the clamping slot on the positioning plate, with auxiliary support pins providing auxiliary positioning. The operator turns the pressure rod to rotate the reel, causing the transmission gear to rotate accordingly. The transmission gear drives the meshing rack to slide, and the rack drives the first piston to move in the first oil chamber, pressing the hydraulic oil in the first oil chamber into the second oil chamber in the base plate through an internal oil passage. Furthermore, the transmission mechanism includes a second piston and a third piston. A second oil chamber and a third oil chamber are provided in the base plate. The second oil chamber is connected to the first oil chamber via an internal oil passage. The second piston is slidably mounted in the second oil chamber, and the third piston is slidably mounted in the third oil chamber. A bolt is provided on the side of the second piston near the third piston, and a nut is connected to the bolt. An adjustment groove is provided on the bottom of the base plate corresponding to the nut's mounting position. Under hydraulic pressure, the second piston in the second oil chamber moves outward, pushing the bolt and nut at its end forward together. The nut pushes the third piston, causing the hydraulic oil in the third oil chamber to be forced into several fourth oil chambers. The fourth piston in the fourth oil chamber moves upward under hydraulic pressure, causing the sliding column and pin to rise together. The pin slides along a curved groove on the inner wall of the sleeve. Due to the helical guiding effect of the curved groove, the linear movement of the pin forces the sleeve to rotate, thereby causing the clamping pin connected to the bottom of the sleeve to deflect in the clamping groove and press against the side wall of the forging to achieve clamping.

[0013] Furthermore, each clamping pin is connected to a sleeve at its bottom. Several fourth oil chambers are formed in the base plate, and several sleeves are rotatably connected to the base plate. The sleeves are located within the fourth oil chambers, and curved grooves are formed on their inner walls. Before clamping, the operator can preset the clamping force by adjusting the length of the nut unscrewed from the bolt. The more the nut is unscrewed, the greater the distance between the nut and the end face of the second piston. The second piston pushes the bolt forward, thereby pushing the third piston to move a longer stroke. The increased stroke of the third piston results in more hydraulic oil being forced into the fourth oil chambers, increasing the upward distance of the fourth piston. This leads to a longer sliding stroke of the pin in the curved grooves, a larger rotation angle of the sleeve, a greater deflection of the clamping pin, and a stronger clamping force applied to the forging. Conversely, screwing in the nut reduces the clamping force. Since all the fourth oil chambers are connected in parallel through internal oil passages and have the same oil flow, the deflection angle of each clamping pin is completely consistent, ensuring that the clamping force at each stress point of the forging is uniform.

[0014] Furthermore, the transmission mechanism includes a fourth piston in the same number as the clamping pins, the fourth piston being slidably mounted in the fourth oil chamber, and several of the fourth oil chambers being connected to the third oil chamber through internal oil passages; Each of the fourth pistons is equipped with a sliding column and a pin. The sliding column is slidably connected to the sleeve, and the pin is integrally set on the top of the sliding column and slidably installed in the curved groove. When it is necessary to release the forging, the operator reverses the lever. The strain energy released by the elastic deformation of the forging and the pressure energy in the hydraulic line drive the hydraulic oil from the fourth oil chamber back to the third oil chamber, further causing the hydraulic oil in the second oil chamber to flow back to the first oil chamber. The lever swings back quickly, and the damping system composed of the magnetic disk and the copper anvil plays a role. The braking torque effectively suppresses the rebound speed of the lever, avoiding injury caused by the sudden rebound of the lever due to the rapid backflow of hydraulic oil, and ensuring the smoothness of the release action.

[0015] Furthermore, several magnets are evenly distributed in a ring within the magnetic disk, with the magnetic poles of every two adjacent magnets facing opposite directions. A gap exists between the copper anvil and the magnetic disk. A servo motor is mounted on one of the hinge blocks, and the servo motor is connected to one end of the reel. The servo motor replaces the operator's manual operation of the pressure lever, thus performing a replacement function.

[0016] Furthermore, a handle bolt is slidably mounted on the positioning plate, and a bolt hole is opened at the end of the pressure rod away from the reel, into which the handle bolt is inserted.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a linkage between a lever mechanism and a transmission mechanism to quickly and synchronously clamp or release multiple clamping pins, resulting in high clamping efficiency. At the same time, the damping system composed of the magnetic disk and the copper anvil generates a braking torque when the pressure rod rebounds, effectively slowing down the swing speed, avoiding mechanical damage, and ensuring safe and reliable operation.

[0018] 2. All clamping pins deflect synchronously to ensure uniform distribution of clamping force. By adjusting the position of the nut, the clamping force can be steplessly controlled to adapt to aluminum alloy precision forgings of different sizes and wall thicknesses, preventing workpiece damage and ensuring stable clamping, making it widely applicable. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic diagram of the structure in the clamping groove of the present invention; Figure 3 This is a schematic diagram of the bottom structure of the positioning plate of the present invention; Figure 4 This is a schematic diagram of the installation structure of the magnetic disk of the present invention; Figure 5 This is a schematic diagram of the mounting structure of the rack of the present invention; Figure 6 This is a schematic diagram of the installation structure of the bolts and nuts of the present invention; Figure 7 This is a schematic diagram of the installation structure of the sleeve of the present invention.

[0020] In the diagram: 1. Positioning plate; 2. Base plate; 3. Pad post; 4. Hinge block; 5. Reel; 6. Pressure rod; 7. Handle bolt; 8. Auxiliary support pin; 9. Clamping pin; 10. Stop bar; 11. Lever; 12. Connecting cable; 13. Clamping tension spring; 14. Reel; 15. Guide roller; 16. Servo motor; 17. Driving bevel gear; 18. Driven bevel gear; 19. Magnetic disk; 20. Copper anvil; 21. Transmission gear; 22. Rack; 23. First piston; 24. First oil chamber; 25. Second piston; 26. Second oil chamber; 27. Bolt; 28. Nut; 29. ​​Third piston; 30. Third oil chamber; 31. Fourth piston; 32. Fourth oil chamber; 33. Sliding column; 34. Pin; 35. Sleeve; 36. Curved groove. Detailed Implementation

[0021] 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.

[0022] Example: Figures 1-7 As shown, the present invention provides a technical solution: a quick-clamping fixture for precision forging of aluminum alloy parts, comprising a positioning plate 1, a base plate 2, and several pads 3. The positioning plate 1 is mounted above the base plate 2 via the pads 3. A clamping groove is provided on the positioning plate 1, and several clamping pins 9 and several auxiliary support pins 8 are disposed in the clamping groove. The clamping pins 9 are rotatably connected to the positioning plate 1. A pair of hinge blocks 4 and a levering mechanism are provided on the same side of the positioning plate 1 and the base plate 2. A transmission mechanism is provided below the positioning plate 1. Connecting the lever mechanism to several clamping pins 9; the lever mechanism includes a spool 5 and a pressure rod 6. The spool 5 is rotatably mounted between a pair of hinge blocks 4. The pressure rod 6 is connected to one side of the spool 5. A driving bevel gear 17 is provided on the side of the spool 5 away from the pressure rod 6. A driven bevel gear 18 and a copper anvil 20 are rotatably mounted in one of the hinge blocks 4. The driven bevel gear 18 meshes with the driving bevel gear 17. A magnetic disk 19 is coaxially connected to the bottom of the driven bevel gear 18. The copper anvil 20 is located below the magnetic disk 19.

[0023] A handle bolt 7 is slidably installed on the positioning plate 1. A bolt hole is opened at the end of the pressure rod 6 away from the scroll 5. The handle bolt 7 is inserted into the bolt hole. Several magnets are evenly distributed in a ring in the magnetic disk 19. The magnetic poles of every two adjacent magnets face opposite directions. There is a gap between the copper anvil 20 and the magnetic disk 19. A servo motor 16 is installed on a hinge block 4. The servo motor 16 is connected to one end of the scroll 5. The servo motor 16 replaces the operator in manually turning the pressure rod 6 and plays a substitute role.

[0024] Example 1: The transmission mechanism includes levers 11 in the same number as the clamping pins 9. The levers 11 are connected to the bottom of the clamping pins 9 and are located between the positioning plate 1 and the base plate 2. A stop bar 10 is installed on one side of each lever 11 at the bottom of the positioning plate 1. A return spring (not shown in the figure) is connected between the stop bar 10 and the lever 11. The transmission mechanism includes several connecting cables 12, several clamping springs 13, and several winding cables 14. The end of each lever 11 away from the clamping pin 9 is tied to the connecting cable 12. One end of the clamping spring 13 is tied to the connecting cable 12, and the other end of the clamping spring 13 is tied to the winding cable 14. The end of the winding cable 14 away from the clamping spring 13 is wound and connected to the roller 5. Several guide rollers 15 are arranged between the positioning plate 1 and the base plate 2. The guide rollers 15 reverse the direction of the winding cable 14.

[0025] The operator first places the aluminum alloy precision forging to be clamped stably in the clamping slot on the positioning plate 1, with auxiliary support pin 8 providing auxiliary positioning. The lever 11, under the tension of the return spring, adheres to the stop bar 10. At this time, the clamping pin 9 is in the initial, unbiased, loose state, and the coiled rope 14 is in a slack state. The operator manually grasps and pulls the pressure lever 6, causing the pressure lever 6 to rotate the reel 5 between a pair of hinge blocks 4. The coiled rope 14 wound on the reel 5 is gradually wound up. Tighten the clamping spring 13 and connecting cable 12 to transmit the tension to each lever 11. The lever 11 overcomes the resistance of the reset spring and deflects, causing the clamping pin 9 to rotate synchronously in the clamping groove. As the pressure rod 6 continues to move, the head of the clamping pin 9 gradually presses against the side wall of the aluminum alloy forging until reliable clamping is achieved. The guide roller 15 constrains and reverses the direction of the winding cable 14 to ensure smooth transmission of tension and avoid frictional interference between the winding cable 14 and the positioning plate 1 or the base plate 2.

[0026] As the pressure lever 6 is turned, the driving bevel gear 17 at the end of the reel 5 rotates accordingly, and the driven bevel gear 18 meshing with it accelerates its rotation. The magnetic disk 19 at the bottom of the driven bevel gear 18 begins to rotate. Since the copper anvil 20 is fixed inside the hinge block 4 and maintains a small gap with the magnetic disk 19, the alternating magnetic field of the magnetic disk 19 induces eddy currents in the copper anvil 20. The induced magnetic field generated by the eddy currents interacts with the original magnetic field to form a braking torque that opposes the rotation of the magnetic disk 19. This torque is transmitted in the opposite direction to the reel 5 through the driven bevel gear 18, causing rotational damping when the pressure lever 6 is turned, which improves the smoothness and controllability of the clamping action. The handle bolt 7 can be slidably inserted into the bolt hole at the end of the pressure lever 6 to lock the pressure lever 6 in the working state and prevent accidental loosening.

[0027] When it is necessary to loosen the forging, the operator reverses the lever 6, and the stretched clamping spring 13 releases its elastic potential energy, generating a rebound force that quickly pulls the lever 11, connecting cable 12, winding cable 14, and winding shaft 5 back to their initial positions. The damping system composed of the magnetic disk 19 and the copper anvil 20 also plays a role when the lever 6 rotates in the opposite direction, effectively slowing down the rotation speed of the winding shaft 5, so that the lever 6 returns to its initial position smoothly and safely, preventing the lever 6 from swinging violently under the spring force, thereby causing impact or crushing injury to the operator's hands, and playing a safety protection role.

[0028] Example 2: The transmission mechanism includes a transmission gear 21, a rack 22, and a first piston 23. The transmission gear 21 and rack 22 are located in a hinge block 4 near the pressure rod 6. The transmission gear 21 is installed on the side of the roller 5 near the pressure rod 6. The rack 22 is slidably installed in the hinge block 4. A first oil chamber 24 is provided in the hinge block 4. The first piston 23 is slidably installed in the first oil chamber 24. The first piston 23 is connected to the rack 22, and the rack 22 meshes with the transmission gear 21. The transmission mechanism includes a second piston 25 and a third piston 29. A second oil chamber 26 and a third oil chamber 30 are provided in the base plate 2. The second oil chamber 26 is connected to the first oil chamber 24 through an internal oil passage. The second piston 25 is slidably installed in the second oil chamber 26, and the third piston 29 is slidably installed in the third oil chamber 30. A bolt 27 is provided on the side of the second piston 25 near the third piston 29. A nut 28 is connected to the bolt 27. An adjustment groove is provided on the bottom of the base plate 2 corresponding to the installation position of the nut 28.

[0029] The operator first places the aluminum alloy precision forging to be clamped stably in the clamping slot on the positioning plate 1, with auxiliary support pin 8 providing auxiliary positioning. The operator then turns the pressure rod 6 to rotate the roller 5, causing the transmission gear 21 to rotate accordingly. The transmission gear 21 drives the meshing rack 22 to slide, and the rack 22 drives the first piston 23 to move in the first oil chamber 24, pressing the hydraulic oil in the first oil chamber 24 into the second oil chamber 26 in the base plate 2 through the internal oil passage. Under the action of oil pressure, the second piston 25 in the second oil chamber 26 moves outward, pushing the screw at its end. Bolt 27 and nut 28 move forward together. Nut 28 pushes the third piston 29, causing the hydraulic oil in the third oil chamber 30 to be forced into several fourth oil chambers 32. The fourth piston 31 in the fourth oil chamber 32 moves upward under the drive of oil pressure, causing the slide 33 and pin 34 to rise together. The pin 34 slides along the curved groove 36 opened on the inner wall of the sleeve 35. Due to the spiral guiding effect of the curved groove 36, the linear movement of the pin 34 forces the sleeve 35 to rotate, which in turn causes the clamping pin 9 connected to the bottom of the sleeve 35 to deflect in the clamping groove and press against the side wall of the forging to achieve clamping.

[0030] Each clamping pin 9 has a sleeve 35 connected to its bottom. Several fourth oil chambers 32 are provided in the base plate 2. Several sleeves 35 are rotatably connected to the base plate 2. The sleeves 35 are located in the fourth oil chambers 32. The inner wall of the sleeves 35 is provided with a curved groove 36. The transmission mechanism includes the same number of fourth pistons 31 as the clamping pins 9. The fourth pistons 31 are slidably installed in the fourth oil chambers 32. Several fourth oil chambers 32 are connected to the third oil chamber 30 through internal oil passages. Each fourth piston 31 is equipped with a sliding column 33 and a pin 34. The sliding column 33 is slidably connected to the sleeve 35. The pin 34 is integrally set on the top of the sliding column 33 and is slidably installed in the curved groove 36.

[0031] The operator can preset the clamping force by adjusting the length of the nut 28 unscrewed from the bolt 27 before clamping. The more the nut 28 is unscrewed, the greater the distance between the nut 28 and the end face of the second piston 25. The second piston 25 pushes the bolt 27 forward, thereby pushing the third piston 29 to move a longer stroke. The increased stroke of the third piston 29 causes more hydraulic oil to be forced into the fourth oil chamber 32, and the rising distance of the fourth piston 31 increases accordingly. The pin 34 slides a longer stroke in the groove 36, the rotation angle of the sleeve 35 is larger, the deflection degree of the clamping pin 9 is greater, and the clamping force applied to the forging is stronger. Conversely, screwing the nut 28 in reduces the clamping force. Since all the fourth oil chambers 32 are connected in parallel through internal oil circuits and have the same oil inlet, the deflection angle of each clamping pin 9 is completely consistent, ensuring that the clamping force at each force point of the forging is uniform.

[0032] When it is necessary to loosen the forging, the operator reverses the lever 6. The strain energy released by the elastic deformation of the forging and the pressure energy in the hydraulic line will drive the hydraulic oil from the fourth oil chamber 32 back to the third oil chamber 30, and further cause the hydraulic oil in the second oil chamber 26 to flow back to the first oil chamber 24. The lever 6 swings back quickly. The damping system composed of the magnetic disk 19 and the copper anvil 20 plays a role. The braking torque effectively suppresses the rebound speed of the lever 6, avoiding injury caused by the sudden rebound of the lever 6 due to the rapid backflow of hydraulic oil, and ensuring the smoothness of the loosening action.

[0033] Working principle of the invention: In the first embodiment, the workpiece clamping process is as follows: The operator first places the aluminum alloy precision forging to be clamped stably in the clamping slot on the positioning plate 1, with auxiliary support pin 8 providing auxiliary positioning. The lever 11 is pressed against the stop bar 10 under the tension of the return spring. At this time, the clamping pin 9 is in the initial unbiased state, and the coil 14 is in a slack state. The operator manually holds the pressure lever 6 and turns it. The pressure lever 6 drives the coil 5 to rotate between a pair of hinge blocks 4, and the coil 14 wound on the coil 5 is gradually deflected. As the coil gradually winds up, the coiled cable 14 tightens the clamping spring 13 and the connecting cable 12, transmitting the tension to each lever 11. The lever 11 overcomes the resistance of the reset spring and deflects, causing the clamping pin 9 to rotate synchronously in the clamping groove. As the pressure rod 6 continues to move, the head of the clamping pin 9 gradually presses against the side wall of the aluminum alloy forging until reliable clamping is achieved. The guide roller 15 constrains and reverses the direction of the coiled cable 14 to ensure smooth transmission of tension and avoid frictional interference between the coiled cable 14 and the positioning plate 1 or the base plate 2.

[0034] The damping process is as follows: When the pressure lever 6 is turned, the driving bevel gear 17 at the end of the reel 5 rotates accordingly, and the driven bevel gear 18 meshing with it accelerates its rotation. The magnetic disk 19 at the bottom of the driven bevel gear 18 begins to rotate. Since the copper anvil 20 is fixed in the hinge block 4 and maintains a small gap with the magnetic disk 19, the alternating magnetic field of the magnetic disk 19 induces eddy currents in the copper anvil 20. The induced magnetic field generated by the eddy currents interacts with the original magnetic field to form a braking torque that opposes the rotation of the magnetic disk 19. This torque is transmitted in the opposite direction to the reel 5 through the driven bevel gear 18, so that turning the pressure lever 6 generates rotational damping, which improves the smoothness and controllability of the clamping action. The handle bolt 7 can be slidably inserted into the bolt hole at the end of the pressure lever 6 to lock the pressure lever 6 in the working state and prevent accidental loosening.

[0035] The process of releasing and resetting the workpiece is as follows: The operator reverses the lever 6, and the stretched clamping spring 13 releases its elastic potential energy, generating a rebound force, which quickly pulls the lever 11, connecting cable 12, winding cable 14 and winding shaft 5 back to the initial position. The damping system composed of magnetic disk 19 and copper anvil disk 20 also plays a role when the lever 6 rotates in the opposite direction, effectively slowing down the rotation speed of winding shaft 5, so that the lever 6 returns to the initial position smoothly and safely, preventing the lever 6 from swinging violently under the drive of spring force, thereby causing impact or crush injury to the operator's hands, and playing a safety protection role.

[0036] In the second embodiment, the workpiece clamping process is as follows: The operator first places the aluminum alloy precision forging to be clamped stably in the clamping slot on the positioning plate 1, with auxiliary support pin 8 providing auxiliary positioning. The operator then moves the pressure rod 6 to rotate the roller 5, causing the transmission gear 21 to rotate accordingly. The transmission gear 21 drives the rack 22, which meshes with it, to slide. The rack 22 drives the first piston 23 to move in the first oil chamber 24, pressing the hydraulic oil in the first oil chamber 24 into the second oil chamber 26 in the base plate 2 through the internal oil passage. The second piston 25 in the second oil chamber 26 moves outward under the action of oil pressure. The bolt 27 and nut 28 at its end are pushed forward together. The nut 28 pushes the third piston 29, so that the hydraulic oil in the third oil chamber 30 is forced into several fourth oil chambers 32. The fourth piston 31 in the fourth oil chamber 32 moves upward under the drive of oil pressure, which drives the slide column 33 and pin 34 to rise together. The pin 34 slides along the curved groove 36 opened on the inner wall of the sleeve 35. Due to the spiral guiding effect of the curved groove 36, the linear movement of the pin 34 forces the sleeve 35 to rotate, which in turn drives the clamping pin 9 connected to the bottom of the sleeve 35 to deflect in the clamping groove and press against the side wall of the forging to achieve clamping.

[0037] The principle of clamping force adjustment is as follows: Before clamping, the operator can preset the clamping force by adjusting the length of the nut 28 unscrewed on the bolt 27. The more the nut 28 is unscrewed, that is, the greater the distance between the nut 28 and the end face of the second piston 25, the more the second piston 25 pushes the bolt 27 forward, thereby pushing the third piston 29 to move a longer stroke. The increased stroke of the third piston 29 causes more hydraulic oil to be forced into the fourth oil chamber 32, and the rising distance of the fourth piston 31 increases accordingly. The pin 34 slides a longer stroke in the groove 36, the rotation angle of the sleeve 35 is larger, the deflection degree of the clamping pin 9 is greater, and the clamping force applied to the forging is stronger. Conversely, screwing the nut 28 in reduces the clamping force. Since all the fourth oil chambers 32 are connected in parallel through internal oil circuits and have the same oil inlet, the deflection angle of each clamping pin 9 is completely consistent, ensuring that the clamping force at each force point of the forging is uniform.

[0038] The process of releasing and resetting the workpiece is as follows: the operator reverses the lever 6, and the strain energy released by the elastic deformation of the forging and the pressure energy in the hydraulic pipeline drive the hydraulic oil from the fourth oil chamber 32 back to the third oil chamber 30, further causing the hydraulic oil in the second oil chamber 26 to flow back to the first oil chamber 24. The lever 6 swings back quickly, and the damping system composed of the magnetic disk 19 and the copper anvil 20 plays a role. The braking torque effectively suppresses the rebound speed of the lever 6, avoiding injury caused by the sudden rebound of the lever 6 due to the rapid backflow of hydraulic oil, and ensuring the smoothness of the release action.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A quick-clamping fixture for precision forging of aluminum alloy parts, characterized in that: The system includes a positioning plate (1), a base plate (2), and several pads (3). The positioning plate (1) is mounted on the base plate (2) via several pads (3). The positioning plate (1) has a clamping groove, in which several clamping pins (9) and several auxiliary support pins (8) are provided. The clamping pins (9) are rotatably connected to the positioning plate (1). A pair of hinge blocks (4) and a levering mechanism are provided on the same side of the positioning plate (1) and the base plate (2). A transmission mechanism is provided below the positioning plate (1), and the transmission mechanism is connected between the levering mechanism and the several clamping pins (9). The actuating mechanism includes a spool (5) and a pressure rod (6). The spool (5) is rotatably mounted between a pair of hinge blocks (4). The pressure rod (6) is connected to one side of the spool (5). A driving bevel gear (17) is provided on the side of the spool (5) away from the pressure rod (6). A driven bevel gear (18) and a copper anvil (20) are rotatably mounted in one of the hinge blocks (4). The driven bevel gear (18) meshes with the driving bevel gear (17). A magnetic disk (19) is coaxially connected to the bottom of the driven bevel gear (18). The copper anvil (20) is located below the magnetic disk (19).

2. The quick-clamping fixture for precision forging of aluminum alloy parts according to claim 1, characterized in that: The transmission mechanism includes levers (11) in the same number as the clamping pins (9). The levers (11) are connected to the bottom of the clamping pins (9). The levers (11) are located between the positioning plate (1) and the base plate (2). A stop bar (10) is installed on one side of the bottom of the positioning plate (1) corresponding to each lever (11). A return spring is connected between the stop bar (10) and the lever (11).

3. A quick-clamping fixture for precision forging of aluminum alloy parts according to claim 2, characterized in that: The transmission mechanism includes several connecting cables (12), several clamping springs (13) and several coils (14). The end of each lever (11) away from the clamping pin (9) is tied to the connecting cable (12), one end of the clamping spring (13) is tied to the connecting cable (12), and the other end of the clamping spring (13) is tied to the coil (14). The end of the coil (14) away from the clamping spring (13) is wound and connected to the reel (5).

4. A quick-clamping fixture for precision forging of aluminum alloy parts according to claim 3, characterized in that: Several guide rollers (15) are provided between the positioning plate (1) and the base plate (2), and the guide rollers (15) reverse the direction of the winding cable (14).

5. A quick-clamping fixture for precision forging of aluminum alloy parts according to claim 1, characterized in that: The transmission mechanism includes a transmission gear (21), a rack (22), and a first piston (23). The transmission gear (21) and the rack (22) are located in a hinge block (4) near the pressure rod (6). The transmission gear (21) is installed on the side of the spool (5) near the pressure rod (6). The rack (22) is slidably installed in the hinge block (4). A first oil chamber (24) is provided in the hinge block (4). The first piston (23) is slidably installed in the first oil chamber (24). The first piston (23) is connected to the rack (22). The rack (22) meshes with the transmission gear (21).

6. A quick-clamping fixture for precision forging of aluminum alloy parts according to claim 5, characterized in that: The transmission mechanism includes a second piston (25) and a third piston (29). The base plate (2) has a second oil chamber (26) and a third oil chamber (30). The second oil chamber (26) is connected to the first oil chamber (24) through an internal oil passage. The second piston (25) is slidably installed in the second oil chamber (26). The third piston (29) is slidably installed in the third oil chamber (30). A bolt (27) is provided on the side of the second piston (25) near the third piston (29). A nut (28) is connected to the bolt (27). An adjustment groove is provided at the bottom of the base plate (2) corresponding to the installation position of the nut (28).

7. A quick-clamping fixture for precision forging of aluminum alloy parts according to claim 6, characterized in that: Each clamping pin (9) is connected to a sleeve (35) at its bottom. Several fourth oil chambers (32) are provided in the base plate (2). Several sleeves (35) are rotatably connected to the base plate (2). The sleeves (35) are located in the fourth oil chambers (32). The inner wall of the sleeves (35) is provided with curved grooves (36).

8. A quick-clamping fixture for precision forging of aluminum alloy parts according to claim 7, characterized in that: The transmission mechanism includes a fourth piston (31) in the same number as the clamping pin (9). The fourth piston (31) is slidably installed in the fourth oil chamber (32). Several of the fourth oil chambers (32) are connected to the third oil chamber (30) through internal oil passages. Each of the fourth pistons (31) is equipped with a slide (33) and a pin (34). The slide (33) is slidably connected to the sleeve (35), and the pin (34) is integrally disposed on the top of the slide (33) and is slidably installed in the groove (36).

9. A quick-clamping fixture for precision forging of aluminum alloy parts according to claim 1, characterized in that: Several magnets are evenly distributed in a ring in the magnetic disk (19), with the magnetic poles of every two adjacent magnets facing opposite directions. There is a gap between the copper anvil (20) and the magnetic disk (19). A servo motor (16) is installed on one of the hinge blocks (4), and the servo motor (16) is connected to one end of the reel (5).

10. A quick-clamping fixture for precision forging of aluminum alloy parts according to claim 1, characterized in that: A handle bolt (7) is slidably installed on the positioning plate (1), and a bolt hole is opened at the end of the pressure rod (6) away from the scroll (5), and the handle bolt (7) is inserted into the bolt hole.

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