Forging piece clamping device suitable for forging machining

Abstract

The forge piece clamping device suitable for forging machining comprises a mounting plate mounted on a movable vehicle body, two T-shaped frames are mounted on the mounting plate in parallel, two clamping jaws are rotationally mounted between the two T-shaped frames through mounting shafts, and the two clamping jaws are symmetrically arranged; first shaft seats are symmetrically installed on the bottom side of the clamping end of the clamping jaw, a first clamping plate is rotationally installed between the two first shaft seats, second shaft seats are symmetrically installed on the top side of the clamping end of the clamping jaw, a second clamping plate is rotationally installed between the two second shaft seats, and the first clamping plate and the second clamping plate are each of a hollow structure. The adjusting ends of the two clamping jaws are rotationally connected with the two ends of the first hydraulic cylinder, and clamping mechanisms are installed at the two ends of the outer side of the T-shaped frame correspondingly. Through 270-degree overturning replacement of the first clamping plate and the second clamping plate, alternate cooling of the contact face is achieved, the continuous working time of the single-side clamping plate is prolonged by more than two times, and the problem that the service life of a traditional clamp is suddenly shortened due to high-temperature annealing is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of forging processing, and particularly relates to a forging clamping device suitable for forging processing. Background Art

[0002] A forging clamping device is a mechanical device specifically designed for safely and efficiently handling forgings in high-temperature and heavy-load environments, realizing multi-directional angle adjustment of the forgings, and cooperating with a forging machine to complete the forging work of the forgings.

[0003] High temperature will cause the softening of metal materials, reduce the strength and stiffness of the clamping jaws, making them prone to deformation or failure when clamping heavy forgings. Moreover, when working in a high-temperature environment, the hydraulic system is prone to failure due to high temperature, which may lead to the dropping of forgings and pose a safety hazard. Summary of the Invention

[0004] The problem solved by the present invention is to provide a forging clamping device suitable for forging processing, which solves the technical problems that high temperature will cause the softening of metal materials, reduce the strength and stiffness of the clamping jaws, making them prone to deformation or failure when clamping heavy forgings, and when working in a high-temperature environment, the hydraulic system is prone to failure due to high temperature, which may lead to the dropping of forgings and pose a safety hazard.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A forging clamping device suitable for forging processing includes a mounting plate installed on a moving vehicle body. Two T-shaped frames are installed in parallel on the mounting plate. Two clamping jaws are rotatably installed between the two T-shaped frames through a mounting shaft, and the two clamping jaws are symmetrically arranged. Symmetrically installed on the bottom side of the clamping end of the clamping jaw are two first shaft seats, and a first clamping plate is rotatably installed between the two first shaft seats. Symmetrically installed on the top side of the clamping end of the clamping jaw are two second shaft seats, and a second clamping plate is rotatably installed between the two second shaft seats. Both the first clamping plate and the second clamping plate are of hollow structure. The adjusting ends of the two clamping jaws are rotatably connected to both ends of a first hydraulic cylinder. Positioning mechanisms are respectively installed at both outer ends of the T-shaped frames.

[0007] Preferably, both sides of the bottom end of the first clamping plate are respectively connected and installed with a first hollow shaft, and the first hollow shaft is connected to the first shaft seat through a bearing. The two first hollow shafts are respectively connected to a first water inlet pipe and a first water outlet pipe through a first rotary joint.

[0008] Preferably, both sides of one end of the second clamping plate are respectively connected and installed with a second hollow shaft, and the second hollow shaft is connected to the second shaft seat through a bearing. The two second hollow shafts are respectively connected to a second water inlet pipe and a second water outlet pipe through a second rotary joint.

[0009] Preferably, the first water inlet pipe and the second water inlet pipe located on the same clamping jaw are respectively connected to the first reversing three-way valve, and the first water outlet pipe and the second water outlet pipe located on the same clamping jaw are respectively connected to the second reversing three-way valve.

[0010] Preferably, transmission boxes are installed on the outer sides of the clamping ends of the two clamping jaws. A first chain gear is installed inside the transmission box and on the outer side of the first hollow shaft at the outer side of the clamping end, and a second chain gear is installed inside the transmission box and on the outer side of the second hollow shaft at the outer side of the clamping end.

[0011] Preferably, a hydraulic motor is installed on the transmission box. A third chain gear is installed at the output end of the hydraulic motor inside the transmission box. The first chain gear, the second chain gear, and the third chain gear are connected by chain drive.

[0012] Preferably, the positioning mechanism includes a two-way hydraulic cylinder installed between two T-shaped frames. The two telescopic ends of the two-way hydraulic cylinder are respectively connected to connecting arms, and lifting plates are respectively installed at both ends of the connecting arms.

[0013] Preferably, the positioning mechanism further includes positioning cylinders installed at both ends of the two T-shaped frames. Bottom end plates are installed inside the positioning cylinders at both ends of the installation shaft, and a first end face ratchet is installed on the bottom end plate.

[0014] Preferably, a plurality of lifting rods are installed on the bottom side of the lifting plate, and a rod sleeve is elastically installed at the bottom end of the lifting rod. The rod sleeve is connected to the top end plate. A second end face ratchet is installed on the bottom side of the top end plate, and the second end face ratchet meshes with the first end face ratchet;

[0015] A limiting plate is installed inside the rod sleeve at the bottom end of the lifting rod, and a spring is installed inside the rod sleeve.

[0016] Preferably, the specific operation steps of the device are as follows:

[0017] Step 1: Drive the clamping jaw to rotate around the installation shaft through the telescopic movement of the first hydraulic cylinder, and then cooperate through the two rotating clamping jaws to complete the clamping and adjustment of the forging during the forging process.

[0018] Step 2: When the first hydraulic cylinder extends, the clamping ends of the two jaws approach each other until the two first clamping plates come into contact with and clamp the forging. At this time, the first water inlet pipe and the first water outlet pipe are connected to the external water pipe through the first three-way directional valve and the second three-way directional valve. Then, through the water circulation in the first water inlet pipe, the first water outlet pipe, and the first clamping plate, the overall temperature of the first clamping plate is reduced. When the first hydraulic cylinder contracts, the clamping ends of the two jaws move away from each other, and the clamping of the forging is released at this time. Then, the hydraulic motor drives the third chain gear to rotate, and the first chain gear and the second chain gear are driven to rotate through the chain, thereby driving the first clamping plate and the second clamping plate to flip. The flipping angle is 270°. At this time, the first clamping plate flips to the bottom side of the adjustment end, and the second clamping plate flips to the original position of the first clamping plate. At this time, the second water inlet pipe and the second water outlet pipe are connected to the external water pipe through the first three-way directional valve and the second three-way directional valve, realizing the replacement and use of the first clamping plate and the second clamping plate;

[0019] Step 3: When the jaws approach each other for clamping, the bottom plate connected to the mounting shaft rotates synchronously. At this time, the first end face ratchet rotates under the bottom side of the second end face ratchet. As the first end face ratchet rotates, the second end face ratchet drives the top plate to lift and lower repeatedly under the action of the spring. When the hydraulic oil in the pipeline causes problems with the first hydraulic cylinder in a high-temperature environment, the first end face ratchet and the second end face ratchet engage with each other at this time to prevent the forging from falling off. When normally separating the forging, the two-way hydraulic cylinder works to drive the lifting plate to move upward, thereby realizing the upward movement of the lifting rod, the rod sleeve, and the top plate, separating the first end face ratchet and the second end face ratchet, and facilitating the normal rotation of the mounting shaft driving the bottom plate and the first end face ratchet.

[0020] The beneficial effects of the present invention are as follows: Through the 270° flipping and replacement of the first clamping plate and the second clamping plate, the rotation of the contact surface for cooling is realized, and the continuous working time of a single clamping plate is extended by more than 2 times, solving the problem of the sharp reduction in the service life of traditional fixtures due to high-temperature annealing;

[0021] The first clamping plate, the first hollow shaft, the first rotary joint, the first water inlet pipe, and the first water outlet pipe form a circulating water flow channel. The second clamping plate, the second hollow shaft, the second rotary joint, the second water inlet pipe, and the second water outlet pipe form a circulating water flow channel. Heat exchange is realized with the first clamping plate and the second clamping plate through the water circulation in the flow channel, achieving the cooling of the first clamping plate and the second clamping plate, ensuring the strength and stiffness of the first clamping plate and the second clamping plate during use, and avoiding deformation or failure when clamping heavy forgings;

[0022] Through the automatic engagement of the first end face ratchet and the second end face ratchet in the clamping mechanism in case of a hydraulic system failure, the risk of the forging falling is eliminated, and through the active unlocking of the two-way hydraulic cylinder, the ratchets are quickly separated by the lifting and lowering of the lifting plate, avoiding mechanical interference and affecting the adjustment flexibility;

[0023] The first clamping plate and the second clamping plate with a rotating design, in cooperation with the opening and closing movement of the clamping jaws, achieve the adaptive shaping of the curved surface of the special-shaped part and the compensation for thickness tolerance. Description of the Drawings

[0024] Figure 1 It is the first overall structural schematic diagram of the present invention;

[0025] Figure 2 It is the second overall structural schematic diagram of the present invention;

[0026] Figure 3 It is the first partial cross-sectional view of the present invention;

[0027] Figure 4 It is the second partial cross-sectional view of the present invention;

[0028] Figure 5 It is the installation structural schematic diagram of the first end-face ratchet wheel and the second end-face ratchet wheel of the present invention;

[0029] Figure 6 It is the internal structural schematic diagram of the rod sleeve of the present invention.

[0030] Legend Explanation:

[0031] 1. Mounting plate; 2. T-shaped frame; 3. Clamping jaw; 4. Mounting shaft; 5. Clamping end; 6. Adjusting end; 7. First shaft seat; 8. First clamping plate; 9. Second shaft seat; 10. Second clamping plate; 11. First hydraulic cylinder; 12. Positioning mechanism; 13. First hollow shaft; 14. First rotary joint; 15. First water inlet pipe; 16. First water outlet pipe; 17. Second hollow shaft; 18. Second rotary joint; 19. Second water inlet pipe; 20. Second water outlet pipe; 21. First reversing three-way valve; 22. Second reversing three-way valve; 23. Transmission box; 24. First chain gear; 25. Second chain gear; 26. Hydraulic motor; 27. Third chain gear; 28. Double-acting hydraulic cylinder; 29. Positioning cylinder; 30. Connecting arm; 31. Lifting plate; 32. Bottom plate; 33. First end-face ratchet wheel; 34. Lifting rod; 35. Rod sleeve; 36. Top plate; 37. Second end-face ratchet wheel; 38. Limiting plate; 39. Spring. Detailed Embodiment

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] The following gives specific embodiments.

[0034] See Figures 1 to 6, A forging clamping device applicable to forging processing, including a mounting plate 1 installed on a mobile vehicle body. Two T-shaped frames 2 are installed in parallel on the mounting plate 1. Two clamping jaws 3 are rotatably installed between the two T-shaped frames 2 through a mounting shaft 4, and the two clamping jaws 3 are symmetrically arranged. The first hydraulic cylinder 11 drives the clamping jaws 3 to rotate around the mounting shaft 4 through telescoping, and then the two rotating clamping jaws 3 cooperate to complete the clamping and adjustment of the forging during the forging process. The bottom sides of the clamping ends 5 of the clamping jaws 3 are symmetrically installed with first shaft seats 7, and a first clamping plate 8 is rotatably installed between the two first shaft seats 7. The top sides of the clamping ends 5 of the clamping jaws 3 are symmetrically installed with second shaft seats 9, and a second clamping plate 10 is rotatably installed between the two second shaft seats 9. Both the first clamping plate 8 and the second clamping plate 10 are hollow structures. The adjusting ends 6 of the two clamping jaws 3 are rotatably connected to both ends of the first hydraulic cylinder 11. Positioning mechanisms 12 are respectively installed at both outer ends of the T-shaped frames 2.

[0035] On both sides of the bottom end of the first clamping plate 8, first hollow shafts 13 are respectively and communicatively installed, and the first hollow shafts 13 are in bearing connection with the first shaft seats 7. The two first hollow shafts 13 are respectively connected to the first water inlet pipe 15 and the first water outlet pipe 16 through the first rotary joints 14. On both sides of one end of the second clamping plate 10, second hollow shafts 17 are respectively and communicatively installed, and the second hollow shafts 17 are in bearing connection with the second shaft seats 9. The two second hollow shafts 17 are respectively connected to the second water inlet pipe 19 and the second water outlet pipe 20 through the second rotary joints 18. The first water inlet pipe 15 and the second water inlet pipe 19 located on the same clamping jaw 3 are respectively connected to the first reversing three-way valve 21. The first water outlet pipe 16 and the second water outlet pipe 20 located on the same clamping jaw 3 are respectively connected to the second reversing three-way valve 22. Transmission boxes 23 are installed on the outer sides of the clamping ends 5 of the two clamping jaws 3. First chain teeth 24 are installed on the outer sides of the first hollow shafts 13 on the outer sides of the clamping ends 5 and inside the transmission boxes 23. Second chain teeth 25 are installed on the outer sides of the second hollow shafts 17 on the outer sides of the clamping ends 5 and inside the transmission boxes 23. Hydraulic motors 26 are installed on the transmission boxes 23. Third chain teeth 27 are installed at the output ends of the hydraulic motors 26 inside the transmission boxes 23. The first chain teeth 24, the second chain teeth 25 and the third chain teeth 27 are connected by chain drive. When the first hydraulic cylinder 11 extends, at this time, the clamping ends 5 of the two clamping jaws 3 approach each other until the two first clamping plates 8 come into contact with and clamp the forging. At this time, the first water inlet pipe 15 and the first water outlet pipe 16 are communicated with the external water pipe through the first reversing three-way valve 21 and the second reversing three-way valve 22. Then, through the water circulation in the first water inlet pipe 15, the first water outlet pipe 16 and the first clamping plate 8, the whole first clamping plate 8 is cooled. When the first hydraulic cylinder 11 contracts, the clamping ends 5 of the two clamping jaws 3 approach each other. At this time, the clamping of the forging is released. At this time, the hydraulic motor 26 drives the third chain teeth 27 to rotate, and drives the first chain teeth 24 and the second chain teeth 25 to rotate through the chain, thereby driving the first clamping plate 8 and the second clamping plate 10 to flip, and the flipping angle is 270°. At this time, the first clamping plate 8 flips to the bottom side of the adjusting end 6, and the second clamping plate 10 flips to the original position of the first clamping plate 8. At this time, the second water inlet pipe 19 and the second water outlet pipe 20 are communicated with the external water pipe through the first reversing three-way valve 21 and the second reversing three-way valve 22, realizing the replacement and use of the first clamping plate 8 and the second clamping plate 10.

[0036] The clamping mechanism 12 includes a double-acting hydraulic cylinder 28 installed between two T-shaped frames 2. The two telescopic ends of the double-acting hydraulic cylinder 28 are respectively connected to connecting arms 30. Lifting plates 31 are respectively installed at both ends of the connecting arms 30. The clamping mechanism 12 further includes clamping cylinders 29 installed at both ends of the two T-shaped frames 2. Bottom end plates 32 are installed at both ends of the installation shaft 4 within the clamping cylinders 29, and a first end face ratchet 33 is installed on the bottom end plates 32. A number of lifting rods 34 are installed on the bottom side of the lifting plates 31, and a rod sleeve 35 is elastically installed at the bottom end of the lifting rods 34. The rod sleeve 35 is connected to a top end plate 36. A second end face ratchet 37 is installed on the bottom side of the top end plate 36, and the second end face ratchet 37 meshes with the first end face ratchet 33. A limiting plate 38 is installed at the bottom end of the lifting rod 34 within the rod sleeve 35, and a spring 39 is installed within the rod sleeve 35. When the clamping jaws 3 approach each other for clamping, the bottom end plates 32 connected to the installation shaft 4 rotate synchronously. At this time, the first end face ratchet 33 rotates under the bottom side of the second end face ratchet 37. With the rotation of the first end face ratchet 33, the second end face ratchet 37 drives the top end plate 36 to lift and lower repeatedly under the action of the spring 39. When the hydraulic oil in the pipeline causes problems with the first hydraulic cylinder 11 in a high-temperature environment, at this time, the first end face ratchet 33 and the second end face ratchet 37 are engaged with each other to prevent the forging from falling off. When normally separating the forging, the double-acting hydraulic cylinder 28 works to drive the lifting plate 31 to move upward, thereby realizing the upward movement of the lifting rod 34, the rod sleeve 35, and the top end plate 36, separating the first end face ratchet 33 and the second end face ratchet 37, and facilitating the normal rotation of the installation shaft 4 driving the bottom end plate 32 and the first end face ratchet 33.

[0037] Through the 270° flipping and replacement of the first clamping plate 8 and the second clamping plate 10, the rotation of the contact surface is realized for cooling, so that the continuous working time of a single-side clamping plate is extended by more than 2 times, and the problem of sudden reduction in the service life of the traditional fixture caused by high-temperature annealing is solved;

[0038] The first clamping plate 8, the first hollow shaft 13, the first rotary joint 14, the first water inlet pipe 15, and the first water outlet pipe 16 form a circulating water flow channel. The second clamping plate 10, the second hollow shaft 17, the second rotary joint 18, the second water inlet pipe 19, and the second water outlet pipe 20 form a circulating water flow channel. Through the water circulation in the flow channel and the first clamping plate 8 and the second clamping plate 10, heat exchange is realized to cool down the first clamping plate 8 and the second clamping plate 10, ensuring the strength and stiffness of the first clamping plate 8 and the second clamping plate 10 during use, and avoiding deformation or failure when clamping heavy forgings;

[0039] Through the automatic engagement of the first end face ratchet 33 and the second end face ratchet 37 in the clamping mechanism 12 in case of a hydraulic system failure, the risk of forging falling is eliminated, and through the active unlocking of the double-acting hydraulic cylinder 28, the ratchets are quickly separated by the lifting of the lifting plate 31, avoiding mechanical interference and affecting the adjustment flexibility;

[0040] The first clamping plate 8 and the second clamping plate 10 with a rotating design cooperate with the opening and closing movement of the clamping jaws 3 to achieve the adaptive shaping of the curved surface of the special-shaped part and the compensation for thickness tolerance.

[0041] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention should cover within the protection scope of the present invention by making equivalent substitutions or changes according to the technical solution and inventive concept of the present invention.

Claims

1. A forging clamping device applicable to forging processing, characterized in that, It includes a mounting plate (1) installed on a moving vehicle body. Two T-shaped frames (2) are installed in parallel on the mounting plate (1). Two clamping jaws (3) are rotatably installed between the two T-shaped frames (2) through a mounting shaft (4), and the two clamping jaws (3) are symmetrically arranged. On the bottom side of the clamping end (5) of the clamping jaw (3), first shaft seats (7) are symmetrically installed, and a first clamping plate (8) is rotatably installed between the two first shaft seats (7). On the top side of the clamping end (5) of the clamping jaw (3), second shaft seats (9) are symmetrically installed, and a second clamping plate (10) is rotatably installed between the two second shaft seats (9). Both the first clamping plate (8) and the second clamping plate (10) are of hollow structure. The adjusting ends (6) of the two clamping jaws (3) are rotatably connected to both ends of a first hydraulic cylinder (11). At both outer ends of the T-shaped frame (2), a clamping position mechanism (12) is respectively installed.

2. The forging clamping device applicable to forging processing according to claim 1, wherein On both sides of the bottom end of the first clamping plate (8), first hollow shafts (13) are respectively and communicatively installed, and the first hollow shafts (13) are in bearing connection with the first shaft seats (7). The two first hollow shafts (13) are respectively connected to a first water inlet pipe (15) and a first water outlet pipe (16) through a first rotary joint (14).

3. The forging clamping device applicable to forging processing according to claim 2, characterized in that, On both sides of one end of the second clamping plate (10), second hollow shafts (17) are respectively and communicatively installed, and the second hollow shafts (17) are in bearing connection with the second shaft seats (9). The two second hollow shafts (17) are respectively connected to a second water inlet pipe (19) and a second water outlet pipe (20) through a second rotary joint (18).

4. The forging clamping device applicable to forging processing according to claim 3, characterized in that, The first water inlet pipe (15) and the second water inlet pipe (19) on the same clamping jaw (3) are respectively connected to a first reversing three-way valve (21), and the first water outlet pipe (16) and the second water outlet pipe (20) on the same clamping jaw (3) are respectively connected to a second reversing three-way valve (22).

5. The forging clamping device applicable to forging processing according to claim 4, characterized in that, On the outer sides of the clamping ends (5) of the two clamping jaws (3), transmission boxes (23) are respectively installed. On the outer side of the first hollow shaft (13) on the outer side of the clamping end (5) and inside the transmission box (23), a first chain gear (24) is installed. On the outer side of the second hollow shaft (17) on the outer side of the clamping end (5) and inside the transmission box (23), a second chain gear (25) is installed.

6. The forging clamping device applicable to forging processing according to claim 5, characterized in that, A hydraulic motor (26) is installed on the transmission box (23). At the output end of the hydraulic motor (26) inside the transmission box (23), a third chain gear (27) is installed. The first chain gear (24), the second chain gear (25), and the third chain gear (27) are connected by a chain drive.

7. An forging clamping device applicable to forging processing according to claim 6, characterized in that, The clamping position mechanism (12) includes a two-way hydraulic cylinder (28) installed between the two T-shaped frames (2). The two telescopic ends of the two-way hydraulic cylinder (28) are respectively connected to a connecting arm (30), and lifting plates (31) are respectively installed at both ends of the connecting arm (30).

8. An forging clamping device applicable to forging processing according to claim 7, characterized in that, The clamping position mechanism (12) further includes clamping position cylinders (29) installed at both ends of the two T-shaped frames (2). At both ends of the mounting shaft (4) inside the clamping position cylinders (29), bottom end plates (32) are installed, and a first end face ratchet wheel (33) is installed on the bottom end plate (32).

9. The forging clamping device applicable to forging processing according to claim 8, characterized in that, A number of lifting rods (34) are installed on the bottom side of the lifting plate (31), and a rod sleeve (35) is elastically installed at the bottom end of the lifting rod (34). The rod sleeve (35) is connected to the top end plate (36). A second end face ratchet (37) is installed on the bottom side of the top end plate (36), and the second end face ratchet (37) meshes with the first end face ratchet (33). A limiting plate (38) is installed at the bottom end of the lifting rod (34) inside the rod sleeve (35), and a spring (39) is installed inside the rod sleeve (35).

10. The forging clamping device applicable to forging processing according to claim 9, characterized in that, The specific operation steps of this device are as follows: Step 1: The telescopic movement of the first hydraulic cylinder (11) drives the clamping jaws (3) to rotate around the mounting shaft (4). Then, through the cooperation of the two rotating clamping jaws (3), during forging, the clamping and adjustment of the forging are completed. Step 2: When the first hydraulic cylinder (11) extends, the clamping ends (5) of the two clamping jaws (3) approach each other until the two first clamping plates (8) come into contact with the forging for clamping. At this time, the first water inlet pipe (15) and the first water outlet pipe (16) are connected to the external water pipe through the first three-way valve (21) and the second three-way valve (22). Then, through the water circulation in the first water inlet pipe (15), the first water outlet pipe (16) and the first clamping plate (8), the overall first clamping plate (8) is cooled. When the first hydraulic cylinder (11) contracts, the clamping ends (5) of the two clamping jaws (3) approach each other. At this time, the clamping of the forging is released. Then, the hydraulic motor (26) drives the third chain gear (27) to rotate, and through the chain, the first chain gear (24) and the second chain gear (25) are driven to rotate, thereby driving the first clamping plate (8) and the second clamping plate (10) to flip, and the flipping angle is 270°. At this time, the first clamping plate (8) flips to the bottom side of the adjustment end (6), and the second clamping plate (10) flips to the original position of the first clamping plate (8). At this time, the second water inlet pipe (19) and the second water outlet pipe (20) are connected to the external water pipe through the first three-way valve (21) and the second three-way valve (22) to realize the replacement and use of the first clamping plate (8) and the second clamping plate (10). Step 3: When the clamping jaws (3) approach each other for clamping, the bottom end plate (32) connected to the mounting shaft (4) rotates synchronously. At this time, the first end face ratchet (33) rotates under the bottom side of the second end face ratchet (37). As the first end face ratchet (33) rotates, the second end face ratchet (37) drives the top end plate (36) to lift and lower repeatedly under the action of the spring (39). When the hydraulic oil in the pipeline causes problems with the first hydraulic cylinder (11) in a high-temperature environment, at this time, the first end face ratchet (33) and the second end face ratchet (37) are engaged with each other to prevent the forging from falling off. When normally separating the forging, the two-way hydraulic cylinder (28) works to drive the lifting plate (31) to move upward, thereby realizing the upward movement of the lifting rod (34), the rod sleeve (35) and the top end plate (36), separating the first end face ratchet (33) and the second end face ratchet (37), and facilitating the normal rotation of the mounting shaft (4) driving the bottom end plate (32) and the first end face ratchet (33).

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