A forging press clamping device for shaft forging

Abstract

The present invention belongs to the technical field of forging of shaft parts, and specifically discloses a forging machine clamping device for shaft forging, including a lifting forging mechanism, an automatic lifting mechanism, a rotary toggle mechanism and a sequential three-way valve, wherein the automatic lifting mechanism is slidably arranged on the lifting forging mechanism, and the rotary toggle mechanism is rotatably arranged on the lifting forging mechanism. The present invention performs intermittent toggling of the workpiece in a unidirectional manner and with uniform amplitude through the lifting and lowering motion of the forging machine itself. Since the frame-type frame drives the rotating spindle to rotate during the rising and falling processes, in order to avoid the reciprocating rotation of the toggle wheel shaft to toggle the workpiece back and forth, the present invention also creatively proposes a sequential three-way valve and a lifting forging mechanism, which automatically realizes the contact and separation of the toggle wheel shaft and the workpiece by controlling the flow sequence of the flow limiting joint and the diverter joint, thereby achieving the technical effect of unidirectional toggling.

Description

Technical Field

[0001] The invention belongs to the technical field of forging shaft parts, and in particular relates to a forging machine clamping device for shaft forging. Background Art

[0002] The main steps of forging shaft parts are: take the heated shaft parts out of the furnace and place them on the forging press, and use the forging press to reciprocate and extrude the workpiece with a hammer or die. A die can also be placed under the workpiece. Since the target shape of the shaft parts is cylindrical, the workpiece needs to be rotated a certain small angle each time it is forged during the forging process.

[0003] The workpiece needs to maintain a certain temperature for forging, but the workpiece taken out of the furnace will cool down rapidly, so the time it can be used for forging is not long. After cooling down, it needs to be returned to the furnace for a longer heating time. Therefore, the forging frequency has a great impact on the overall production efficiency of the workpiece. For larger shaft workpieces, it is not easy to manually control the rotation during the forging gap. On the other hand, it is difficult to control the angle and timing of each rotation accurately and evenly. The grippers at the end of the manipulator mostly do not have a rotation function, and the manipulator originally responsible for multiple stations cannot always keep the workpiece clamped at one forging station.

[0004] Therefore, in order to liberate manpower, it is necessary to propose a forging clamping device that can automatically and evenly rotate the workpiece during the forging process. Summary of the Invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes a forging machine clamping device for shaft forging processing, which can perform unidirectional and uniform intermittent toggling of the workpiece at both ends of the shaft parts through the lifting and lowering movement of the forging machine itself through a rotating toggle mechanism. Since the frame-type frame drives the rotating spindle to rotate during the rising and falling process, in order to avoid the reciprocating rotation of the toggle wheel axle to toggle the workpiece back and forth, the present invention also creatively proposes a sequential three-way valve and a lifting forging mechanism, which automatically realizes the contact and separation of the toggle wheel axle and the workpiece by controlling the flow sequence of the flow limiting joint and the diverter joint, thereby achieving the technical effect of unidirectional toggling.

[0006] The technical solution adopted by the present invention is as follows: The present invention proposes a forging machine clamping device for shaft forging processing, including a lifting forging mechanism, an automatic lifting mechanism, a rotary toggle mechanism and a sequential three-way valve, the automatic lifting mechanism is slidably arranged on the lifting forging mechanism, and the rotary toggle mechanism is rotatably arranged on the lifting forging mechanism; the lifting forging mechanism includes a lifting guide assembly, a forging drive assembly and a diverter drive assembly, the forging drive assembly is arranged on the lifting guide assembly, the sequential three-way valve is arranged on the forging drive assembly, and the diverter drive assembly is arranged on the lifting guide assembly.

[0007] The lifting and lowering forging mechanism can automatically rotate the workpiece in a single direction with a small amplitude during the forging and lifting process, thereby realizing continuous forging of shaft workpieces. The automatic rotation method can not only relatively evenly control the angle of each rotation, but also improve the forging quality.

[0008] Preferably, the sequential three-way valve is provided with a first joint, a flow-limiting joint and a diverter joint, and an external pump supplies liquid into or extracts liquid from the sequential three-way valve through the first joint. The flow-limiting joint is provided with a valve for increasing the flow resistance of the liquid. The flow-limiting joint is used to drive the forging drive assembly, and the diverter joint is used to drive the diverter drive assembly.

[0009] Since the flow resistance of the liquid in the flow limiting joint and the diverter joint is different, when the first joint supplies liquid to the sequential three-way valve, the liquid will first enter the diverter joint. When the liquid in the diverter joint cannot flow, the liquid will enter the flow limiting joint. When the first joint extracts liquid from the sequential three-way valve, the liquid in the diverter joint will still first flow back into the sequential three-way valve. When the liquid in the diverter joint cannot flow back, the liquid in the flow limiting joint will flow back into the sequential three-way valve.

[0010] As a further preferred embodiment of the present invention, the lifting guide assembly includes a base, a main base plate, a vertical slider and a frame frame, the main base plate is arranged on the base, vertical guide rods are arrayed on the main base plate, the vertical slider is engaged and slidably arranged on the vertical guide rods, and the frame frame is fixed to the vertical slider.

[0011] Preferably, the forging drive assembly includes a main housing, a forging cylinder, a recovery guide rod and a recovery spring. The main housing is arranged on the main base plate. The first joint and the forging cylinder are connected through a hydraulic pipeline. The forging cylinder is arranged on the inner top of the main housing. The recovery guide rod is arranged on the main base plate. The frame frame is slidably arranged on the recovery guide rod. The recovery spring is arranged between the main base plate and the frame frame.

[0012] As a further preferred embodiment of the present invention, the diverter drive assembly includes a diverter cylinder, a telescopic part, a transfer top block and a return spring. The diverter cylinder is fixed to the frame frame through a bracket, the diverter joint and the diverter cylinder are connected by a hydraulic pipeline, the telescopic part is telescopically arranged in the diverter cylinder, the transfer top block is slidably arranged on the frame frame, and wing plates are symmetrically provided on both sides of the transfer top block. One end of the return spring is provided on the wing plate, and the other end of the return spring is provided with a spring mounting seat, and the spring mounting seat is fixed to the frame frame.

[0013] The upper die used for forging is set at the end of the forging cylinder and can slide slightly relative to the frame frame. The lower die is set on the main base plate. Through the diversion control of the sequential three-way valve, the diversion cylinder body can extend before the forging cylinder when pressing down, and retract before the forging cylinder when rising.

[0014] Furthermore, the automatic lifting mechanism includes a lifting base plate, a lifting bracket, a lifting rod and a lifting spring. The lifting base plate is located in the base, the lifting bracket is symmetrically arranged on the lifting base plate, a pressing part is provided on the top of the lifting bracket, and an oblique branch part is also provided in the middle position of the lifting bracket. The lifting rod is rotatably arranged on the oblique branch part, and the lifting spring is arranged between the lifting base plate and the base.

[0015] The relative position between the lifting bracket and the frame frame can be changed by the extension and contraction of the diverter cylinder, thereby controlling the contact and separation of the workpiece and the toggle wheel shaft. Since the rotating spindle rotates in both the rising and falling stages, the toggle wheel shaft can realize unidirectional rotation of the workpiece through the contact and separation of the workpiece and the toggle wheel shaft.

[0016] Furthermore, the rotary toggle mechanism includes a rotary assembly, a transmission assembly and an adjustable self-driving assembly. The rotary assembly is rotatably arranged in the frame frame, the transmission assembly is arranged on the rotary assembly, and the adjustable self-driving assembly is arranged on the rotary assembly.

[0017] Preferably, the rotating assembly includes a bearing, a rotating main shaft, a hanging plate and a rotating secondary shaft, the bearing is arranged in a frame frame, the rotating main shaft rotates in the bearing, the hanging plate is fixed to the frame frame, and the rotating secondary shaft rotates in the hanging plate.

[0018] As a further preferred embodiment of the present invention, the transmission assembly includes a driving bevel gear, a driven bevel gear, a toggle wheel shaft and a synchronous transmission mechanism, the driving bevel gear is arranged on the rotating main shaft, the driven bevel gear is arranged on the rotating secondary shaft, the driving bevel gear and the driven bevel gear are engaged for transmission, the toggle wheel shaft is rotatably arranged in the hanging plate, and the rotating secondary shaft and the toggle wheel shaft are connected through a synchronous transmission mechanism.

[0019] Preferably, the two rotating spindles are centrally symmetrically distributed, and the two active bevel gears are located on the same side of the workpiece, so the two shifting wheel shafts rotate in the same direction.

[0020] During the rising and falling process, the rotating spindle will have a stage of being toggled and rotated, thereby rotating the toggling wheel axle. However, since the rotating spindle rotates reciprocatingly, in order to prevent the toggling wheel axle from toggling the workpiece back and forth, the contact and separation of the workpiece and the toggling wheel axle can be controlled during the lifting process through the expansion and contraction of the diverter cylinder, so as to achieve the technical purpose of not toggling the workpiece during descent (improving stability) and toggling the workpiece after forging (switching the forging angle) after the forging is completed.

[0021] As a further preferred embodiment of the present invention, the adjustable self-drive component includes a rack bracket, an adjusting nut, a locking ring and a spur gear. The rack bracket is arranged on the main base plate, and racks of different lengths are arranged side by side on the rack bracket. A threaded portion is provided on the rotating main shaft, and the adjusting nut and the threaded portion are threadedly connected. An elastic fork portion is provided at the end of the adjusting nut, and the locking ring and the elastic fork portion are threadedly connected. The opening and tightening of the elastic fork portion can be controlled by rotating the locking ring on the elastic fork portion. The spur gear is fixed to the adjusting nut, and the spur gear and the rack on the rack bracket are engaged for transmission.

[0022] By adjusting the position of the spur gear on the rotating spindle, the spur gear can be engaged with racks of different lengths in a lifting manner, thereby changing the rotation amplitude of the workpiece within a single forging cycle.

[0023] The beneficial effects achieved by the present invention using the above structure are as follows:

[0024] (1) During the descent process, the distance between the frame and the lifting bracket is increased by the telescopic part. On the one hand, it can avoid the workpiece from being moved by the axle during the downward pressing process. On the other hand, during the bottom forging, the lifting rod and the workpiece can be separated by the retraction of the lifting bracket. Therefore, when the workpiece is forged, the bottom of the workpiece only contacts the lower die, and the lifting rod and the lifting bracket will not be damaged due to the huge forging pressure.

[0025] (2) The lifting and lowering forging mechanism can automatically rotate the workpiece in a single direction with a small amplitude during the forging and lifting process, thereby realizing continuous forging of shaft-type workpieces. The automatic rotation method can not only relatively evenly control the angle of each rotation, but also improve the forging quality.

[0026] (3) Since the flow resistance of the liquid in the flow-limiting joint and the diverter joint is different, when the first joint supplies liquid to the sequential three-way valve, the liquid will first enter the diverter joint. When the liquid in the diverter joint cannot flow, the liquid will enter the flow-limiting joint. When the first joint extracts liquid from the sequential three-way valve, the liquid in the diverter joint will still first flow back into the sequential three-way valve. When the liquid in the diverter joint cannot flow back, the liquid in the flow-limiting joint will flow back into the sequential three-way valve.

[0027] (4) The relative position between the lifting bracket and the frame can be changed by the extension and contraction of the diverter cylinder, thereby controlling the contact and separation of the workpiece and the toggle wheel shaft. Since the rotating spindle rotates in both the rising and falling stages, the toggle wheel shaft can realize the unidirectional rotation of the workpiece through the contact and separation of the workpiece and the toggle wheel shaft.

[0028] (5) During the process of rising and falling, the rotating spindle will be rotated in a stage, which will cause the toggle wheel to rotate. However, since the rotating spindle rotates back and forth, in order to prevent the toggle wheel from toggling the workpiece back and forth, the contact and separation of the workpiece and the toggle wheel can be controlled during the lifting process by extending and retracting the diverter cylinder, so as to achieve the technical purpose of not toggling the workpiece during descent (improving stability) and toggling the workpiece after forging (switching the forging angle). BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A three-dimensional diagram of a clamping device for a forging press used for shaft forging proposed by the present invention;

[0030] Figure 2 This is a front view of a forging press clamping device for shaft forging proposed by the present invention;

[0031] Figure 3 for Figure 2 A cross-sectional view along the cutting line AA;

[0032] Figure 4 for Figure 3 A cross-sectional view along the cutting line BB;

[0033] Figure 5 for Figure 2 A cross-sectional view along the cutting line CC;

[0034] Figure 6 for Figure 3 A cross-sectional view along the cutting line DD;

[0035] Figure 7 This is a schematic diagram of the exploded structure of a clamping device for a forging press used for shaft forging proposed by the present invention;

[0036] Figure 8 for Figure 3 A partial enlarged view of point Ⅰ in the middle;

[0037] Figure 9 for Figure 4 A partial enlarged view of the middle II;

[0038] Figure 10 for Figure 5 A partial enlarged view of point III in the middle;

[0039] Figure 11 for Figure 5 A partial enlarged view of the middle IV;

[0040] Figure 12 for Figure 6 A partial enlarged view of point V in the middle;

[0041] Figure 13 It is a schematic diagram of the optional structural forms between the frame rack and the upper mold.

[0042] Among them, 1. lifting and forging mechanism, 2. automatic lifting mechanism, 3. rotary toggle mechanism, 4. sequential three-way valve, 5. lifting guide assembly, 6. forging drive assembly, 7. diverter drive assembly, 8. base, 9. main base plate, 10. vertical slider, 11. frame frame, 12. main housing, 13. forging cylinder, 14. lifting guide rod, 15. lifting spring, 16. diverter cylinder, 17. telescopic part, 18. adapter top block, 19. reset spring, 20. vertical guide rod, 21. spring mounting seat, 22. lifting base plate, 23. lifting bracket, 24. Lifting stick, 25. Lifting spring, 26. Pressing part, 27. Oblique branch part, 28. Rotating assembly, 29. Transmission assembly, 30. Adjustable self-drive assembly, 31. Bearing, 32. Rotating main shaft, 33. Lifting plate, 34. Rotating secondary shaft, 35. Driving bevel gear, 36. Driven bevel gear, 37. Driving wheel shaft, 38. Synchronous transmission mechanism, 39. Rack bracket, 40. Adjusting nut, 41. Locking ring, 42. Spur gear, 43. Threaded part, 44. Elastic fork part, 45. First joint, 46. Current limiting joint, 47. Diverter joint.

[0043] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0046] like Figures 1 to 12 As shown, the present invention proposes a forging machine clamping device for shaft forging processing, including a lifting forging mechanism 1, an automatic lifting mechanism 2, a rotary toggle mechanism 3 and a sequential three-way valve 4. The automatic lifting mechanism 2 is slidably arranged on the lifting forging mechanism 1, and the rotary toggle mechanism 3 is rotatably arranged on the lifting forging mechanism 1; the lifting forging mechanism 1 includes a lifting guide assembly 5, a forging drive assembly 6 and a diverter drive assembly 7, the forging drive assembly 6 is arranged on the lifting guide assembly 5, the sequential three-way valve 4 is arranged on the forging drive assembly 6, and the diverter drive assembly 7 is arranged on the lifting guide assembly 5.

[0047] The lifting forging mechanism 1 can automatically rotate the workpiece in a single direction with a small amplitude during the forging lifting process, thereby realizing continuous forging of shaft-type workpieces. The automatic rotation method can not only relatively evenly control the angle of each rotation, but also improve the forging quality.

[0048] The sequential three-way valve 4 is provided with a first joint 45, a flow limiting joint 46 and a diverter joint 47. An external pump supplies liquid into or extracts liquid from the sequential three-way valve 4 through the first joint 45. The flow limiting joint 46 is provided with a valve for increasing the flow resistance of the liquid. The flow limiting joint 46 is used to drive the forging drive assembly 6, and the diverter joint 47 is used to drive the diverter drive assembly 7.

[0049] Since the flow resistance of the liquid in the flow limiting joint 46 and the diverter joint 47 is different, when the first joint 45 supplies liquid to the sequential three-way valve 4, the liquid will first enter the diverter joint 47. When the liquid in the diverter joint 47 cannot flow, the liquid will enter the flow limiting joint 46. When the first joint 45 extracts liquid from the sequential three-way valve 4, the liquid in the diverter joint 47 will still first flow back into the sequential three-way valve 4. When the liquid in the diverter joint 47 cannot flow back, the liquid in the flow limiting joint 46 will flow back into the sequential three-way valve 4.

[0050] The lifting guide assembly 5 includes a base 8, a main base plate 9, a vertical slider 10 and a frame frame 11. The main base plate 9 is arranged on the base 8. Vertical guide rods 20 are arranged in an array on the main base plate 9. The vertical slider 10 is engaged and slidably arranged on the vertical guide rods 20. The frame frame 11 is fixed to the vertical slider 10.

[0051] The forging drive assembly 6 includes a main housing 12, a forging cylinder 13, a recovery guide rod 14 and a recovery spring 15. The main housing 12 is arranged on the main base plate 9. The first joint 45 and the forging cylinder 13 are connected through a hydraulic pipeline. The forging cylinder 13 is arranged at the inner top of the main housing 12, the recovery guide rod 14 is arranged on the main base plate 9, the frame frame 11 is slidably arranged on the recovery guide rod 14, and the recovery spring 15 is arranged between the main base plate 9 and the frame frame 11.

[0052] The shunt drive assembly 7 includes a shunt cylinder 16, a telescopic part 17, an adapter top block 18 and a return spring 19. The shunt cylinder 16 is fixed to the frame frame 11 through a bracket. The shunt joint 47 and the shunt cylinder 16 are connected by a hydraulic pipeline. The telescopic part 17 is telescopically arranged in the shunt cylinder 16. The adapter top block 18 is slidably arranged on the frame frame 11. Wing plates are symmetrically provided on both sides of the adapter top block 18. One end of the return spring 19 is provided on the wing plate. The other end of the return spring 19 is provided with a spring mounting seat 21. The spring mounting seat 21 is fixed to the frame frame 11.

[0053] The upper die for forging is arranged at the end of the forging cylinder 13 and can slide slightly relative to the frame frame 11. The lower die is arranged on the main base plate 9. Through the diversion control of the sequential three-way valve 4, the diversion cylinder body 16 can be extended before the forging cylinder 13 when pressing down, and the diversion cylinder body 16 can also be retracted before the forging cylinder 13 when rising.

[0054] The automatic lifting mechanism 2 includes a lifting base plate 22, a lifting bracket 23, a lifting rod 24 and a lifting spring 25. The lifting base plate 22 is located in the base 8, and the lifting bracket 23 is symmetrically arranged on the lifting base plate 22. A pressing part 26 is provided on the top of the lifting bracket 23, and an oblique branch part 27 is also provided in the middle position of the lifting bracket 23. The lifting rod 24 is rotatably arranged on the oblique branch part 27, and the lifting spring 25 is arranged between the lifting base plate 22 and the base 8.

[0055] The relative position between the lifting bracket 23 and the frame frame 11 can be changed by extending and retracting the diverter cylinder 16, thereby controlling the contact and separation of the workpiece and the toggle wheel shaft 37. Since the rotating spindle 32 rotates in both the rising and falling stages, the toggle wheel shaft 37 can realize unidirectional rotation of the workpiece through the contact and separation of the workpiece and the toggle wheel shaft 37.

[0056] The rotary toggle mechanism 3 includes a rotary assembly 28 , a transmission assembly 29 and an adjustable self-driving assembly 30 . The rotary assembly 28 is rotatably arranged in the frame frame 11 , the transmission assembly 29 is arranged on the rotary assembly 28 , and the adjustable self-driving assembly 30 is arranged on the rotary assembly 28 .

[0057] The rotating assembly 28 includes a bearing 31, a rotating main shaft 32, a hanging plate 33 and a rotating secondary shaft 34. The bearing 31 is arranged in the frame frame 11, the rotating main shaft 32 is rotatably arranged in the bearing 31, the hanging plate 33 is fixed to the frame frame 11, and the rotating secondary shaft 34 is rotatably arranged in the hanging plate 33.

[0058] The transmission assembly 29 includes a driving bevel gear 35, a driven bevel gear 36, a toggle wheel shaft 37 and a synchronous transmission mechanism 38. The driving bevel gear 35 is provided on the rotating main shaft 32, and the driven bevel gear 36 is provided on the rotating secondary shaft 34. The driving bevel gear 35 and the driven bevel gear 36 are engaged for transmission. The toggle wheel shaft 37 is rotatably provided in the hanging plate 33, and the rotating secondary shaft 34 and the toggle wheel shaft 37 are connected through the synchronous transmission mechanism 38.

[0059] The two rotating spindles 32 are symmetrically distributed around the center, and the two driving bevel gears 35 are located on the same side of the workpiece, so the two shifting wheel shafts 37 rotate in the same direction.

[0060] During the rising and falling process, the rotating main shaft 32 will have a stage of being toggled and rotated, thereby rotating the toggling wheel shaft 37. However, since the rotating main shaft 32 rotates back and forth, in order to prevent the toggling wheel shaft 37 from toggling the workpiece back and forth, the contact and separation of the workpiece and the toggling wheel shaft 37 can be controlled during the lifting process through the extension and contraction of the diverter cylinder body 16, so as to achieve the technical purpose of not toggling the workpiece during descent (improving stability) and toggling the workpiece after forging is completed (switching the forging angle).

[0061] The adjustable self-driving assembly 30 includes a rack bracket 39, an adjusting nut 40, a locking ring 41 and a spur gear 42. The rack bracket 39 is arranged on the main base plate 9. Racks of different lengths are arranged side by side on the rack bracket 39. A threaded portion 43 is provided on the rotating main shaft 32. The adjusting nut 40 and the threaded portion 43 are threadedly connected. An elastic fork portion 44 is provided at the end of the adjusting nut 40. The locking ring 41 and the elastic fork portion 44 are threadedly connected. The opening and tightening of the elastic fork portion 44 can be controlled by rotating the locking ring 41 on the elastic fork portion 44. The spur gear 42 is fixed to the adjusting nut 40, and the spur gear 42 and the rack on the rack bracket 39 are engaged for transmission.

[0062] By adjusting the position of the spur gear 42 on the rotating spindle 32 , the spur gear 42 can be engaged with racks of different lengths in a lifting manner, thereby changing the rotation amplitude of the workpiece within a single forging cycle.

[0063] like Figure 13 As shown, the positional relationship between the frame frame 11 and the upper mold can be selected as shown in the figure, or other forms that can achieve the function can be selected. In the illustrated form, the sliding resistance of the sliding members on both sides is large. Therefore, when the lower mold located in the middle position is pressed down, it will first bring the frame frame 11 down together. When the frame frame 11 cannot be lowered, the upper mold will descend relative to the frame frame 11; and after the frame frame 11 rises to the equilibrium position, the continued rise of the upper mold will not affect the frame frame 11.

[0064] During specific use, first take the shaft forgings out of the heating furnace through the external mechanical claws, and place them horizontally into this device, and place the workpiece on the lower mold located on the main base plate 9. In the initial state, since the lifting bracket 23 is in an ascending state, it is necessary to first pull down the lifting base plate 22 through an external device to make the lifting bracket 23 actively descend and leave space for placing the workpiece; then the downward pulling force on the lifting base plate 22 can be removed, and the lifting base plate 22 and the lifting bracket 23 will rise together with the workpiece under the pulling force of the lifting spring 25 until the workpiece is against the toggle wheel shaft 37.

[0065] Then, the liquid is supplied to the sequential three-way valve 4 through an external hydraulic pump. Since the flow resistance of the liquid in the flow-limiting joint 46 and the flow-dividing joint 47 is different, when the first joint 45 supplies liquid to the sequential three-way valve 4, the liquid will first enter the flow-dividing joint 47. When the liquid in the flow-dividing joint 47 cannot flow, the liquid will enter the flow-limiting joint 46.

[0066] During this process, the telescopic portion 17 located in the diverter cylinder body 16 will first extend to the limit position driven by the liquid in the diverter joint 47, and then the flow-limiting joint 46 can push the forging cylinder 13 to extend. Since the telescopic portion 17 has already extended at this time, it will first press the lifting bracket 23 downward to a certain extent through the adapter top block 18, and separate the workpiece and the toggle wheel shaft 37;

[0067] Therefore, during the descending process, no matter whether the shifting wheel shaft 37 rotates or not, the workpiece will not rotate, thereby avoiding the stability impact caused by the rotation of the workpiece during the descending forging process.

[0068] An upper die for forging is provided at the end of the forging cylinder 13, and the upper die can slide slightly relative to the frame 11. Therefore, during the extension of the forging cylinder 13, the frame 11 is first pushed down. When the frame 11 is lowered to the limit position (that is, the toggle wheel shaft 37 contacts the workpiece and the workpiece abuts the lower die), the continued extension of the forging cylinder 13 will push the upper die to descend independently by a small amount, thereby achieving forging of the workpiece.

[0069] Since the distance between the frame frame 11 and the lifting bracket 23 has been limited by the extended telescopic part 17, the lifting bracket 23 has retracted during forging and the lifting rod 24 is separated from the workpiece. Therefore, when the workpiece is forged, the bottom of the workpiece only contacts the lower die, and the lifting rod 24 and the lifting bracket 23 will not be damaged due to the huge forging pressure.

[0070] When rising, the liquid in the sequential three-way valve 4 is extracted by the external pump. At this time, the liquid in the diverter joint 47 is still the first to flow back into the sequential three-way valve 4. When the liquid in the diverter joint 47 cannot flow back, the liquid in the flow-limiting joint 46 will flow back into the sequential three-way valve 4.

[0071] After the pressure of the transfer top block 18 is removed, the lifting bracket 23 will rise under the tension of the lifting spring 25, and lift the workpiece together through the lifting rod 24 until the workpiece abuts the toggle wheel shaft 37; then the lifting rod 24 and the workpiece will rise together with the frame 11 during the process of contraction of the forging cylinder 13, during which the frame 11 is driven by the elastic force of the return spring 15;

[0072] During the rising process of the frame 11, the spur gear 42 passes through the rack and is driven to rotate by the rack. When the spur gear 42 rotates the rotating main shaft 32 through the adjusting nut 40, the rotating countershaft 34 also rotates through the transmission between the driving bevel gear 35 and the driven bevel gear 36. The rotating countershaft 34 can rotate with the toggle wheel shaft 37 through the synchronous transmission mechanism 38. Since the workpiece always presses against the toggle wheel shaft 37 during this process, the workpiece will be toggle rotated by a certain amplitude at this time.

[0073] The two rotating spindles 32 are symmetrically distributed around the center, and the two driving bevel gears 35 are located on the same side of the workpiece, so the two shifting wheel shafts 37 rotate in the same direction.

[0074] By repeatedly controlling the lifting and lowering of the lifting forging mechanism 1, the reciprocating forging of the workpiece can be achieved, and the workpiece can be rotated unidirectionally and evenly with a small amplitude during the forging interval.

[0075] If you want to change the amplitude of a single rotation of the workpiece, you need to manually rotate the locking ring 41 when the spur gear 42 is not engaged with the rack to relax and expand the elastic fork 44, and then rotate the adjusting nut 40 to change the axial position of the adjusting nut 40 in the rotating spindle 32, so that the spur gear 42 corresponds to racks of different lengths. After the adjustment is completed, rotate the locking ring 41 again to tighten and clamp the elastic fork 44 to achieve locking between the adjusting nut 40 and the rotating spindle 32.

[0076] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0077] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A clamping device for a forging press used for shaft forging, characterized in that: It includes a lifting and forging mechanism, an automatic lifting mechanism, a rotary toggle mechanism and a sequential three-way valve, wherein the automatic lifting mechanism is slidably arranged on the lifting and forging mechanism, and the rotary toggle mechanism is rotatably arranged on the lifting and forging mechanism; The lifting and forging mechanism includes a lifting guide assembly, a forging drive assembly and a diverter drive assembly, wherein the forging drive assembly is arranged on the lifting guide assembly, the sequential three-way valve is arranged on the forging drive assembly, and the diverter drive assembly is arranged on the lifting guide assembly; The sequential three-way valve is provided with a first joint, a flow-limiting joint, and a flow-diverting joint. An external pump supplies liquid into or extracts liquid from the sequential three-way valve through the first joint. The flow-limiting joint is provided with a valve for increasing the flow resistance of the liquid. The flow-limiting joint is used to drive the forging drive assembly, and the flow-diverting joint is used to drive the flow-diverting drive assembly. The lifting guide assembly includes a base, a main base plate, a vertical slider and a frame frame, wherein the main base plate is arranged on the base, vertical guide rods are arranged in an array on the main base plate, the vertical slider is engaged and slidably arranged on the vertical guide rods, and the frame frame is fixed to the vertical slider; The automatic lifting mechanism includes a lifting base plate, a lifting bracket, a lifting rod and a lifting spring. The lifting base plate is located in the base, the lifting bracket is symmetrically arranged on the lifting base plate, a pressing portion is provided on the top of the lifting bracket, and an oblique branch portion is further provided in the middle of the lifting bracket. The lifting rod is rotatably arranged on the oblique branch portion, and the lifting spring is arranged between the lifting base plate and the base. The rotary toggle mechanism includes a rotary assembly, a transmission assembly and an adjustable self-driving assembly, wherein the rotary assembly is rotatably arranged in a frame-type frame, the transmission assembly is arranged on the rotary assembly, and the adjustable self-driving assembly is arranged on the rotary assembly; The rotating assembly includes a bearing, a rotating main shaft, a hanging plate and a rotating secondary shaft. The bearing is arranged in a frame frame, the rotating main shaft is rotatably arranged in the bearing, the hanging plate is fixed to the frame frame, and the rotating secondary shaft is rotatably arranged in the hanging plate.

2. The clamping device for a forging press for shaft forging according to claim 1, characterized in that: The transmission assembly includes a driving bevel gear, a driven bevel gear, a toggle wheel shaft and a synchronous transmission mechanism. The driving bevel gear is arranged on the rotating main shaft, and the driven bevel gear is arranged on the rotating secondary shaft. The driving bevel gear and the driven bevel gear are engaged for transmission. The toggle wheel shaft is rotatably arranged in the hanging plate, and the rotating secondary shaft and the toggle wheel shaft are connected through the synchronous transmission mechanism.

3. The clamping device for a forging press for shaft forging according to claim 2, characterized in that: The two rotating spindles are distributed symmetrically with respect to the center, and the two driving bevel gears are located on the same side of the workpiece, so the two shifting wheel shafts rotate in the same direction.

4. A clamping device for a forging press for shaft forging according to claim 3, characterized in that: The adjustable self-driving assembly includes a rack bracket, an adjusting nut, a locking ring and a spur gear. The rack bracket is arranged on the main base plate. Racks of different lengths are arranged side by side on the rack bracket. A threaded portion is provided on the rotating main shaft. The adjusting nut and the threaded portion are threadedly connected. An elastic fork portion is provided at the end of the adjusting nut. The locking ring and the elastic fork portion are threadedly connected. The opening and tightening of the elastic fork portion can be controlled by rotating the locking ring on the elastic fork portion. The spur gear is fixed to the adjusting nut. The spur gear and the rack on the rack bracket are engaged for transmission.

5. The clamping device for a forging press for shaft forging according to claim 1, characterized in that: The forging drive assembly includes a main housing, a forging cylinder, a recovery guide rod and a recovery spring. The main housing is arranged on the main base plate. The first joint and the forging cylinder are connected through a hydraulic pipeline. The forging cylinder is arranged on the inner top of the main housing. The recovery guide rod is arranged on the main base plate. The frame frame is slidably arranged on the recovery guide rod. The recovery spring is arranged between the main base plate and the frame frame.

6. The clamping device for a forging press for shaft forging according to claim 5, characterized in that: The shunt drive assembly includes a shunt cylinder, a telescopic part, an adapter top block and a return spring. The shunt cylinder is fixed to the frame frame through a bracket. The shunt joint and the shunt cylinder are connected through a hydraulic pipeline. The telescopic part is telescopically arranged in the shunt cylinder. The adapter top block is slidably arranged on the frame frame. Wing plates are symmetrically provided on both sides of the adapter top block. One end of the return spring is provided on the wing plate. The other end of the return spring is provided with a spring mounting seat. The spring mounting seat is fixed to the frame frame.

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