Forging press clamping device for shaft forging machining

Abstract

The invention belongs to the technical field of shaft part forging and pressing, and particularly discloses a forging press clamping device for shaft forging machining, which comprises a lifting forging and pressing mechanism, an automatic lifting mechanism, a rotary shifting mechanism and a sequential three-way valve, the automatic lifting mechanism is slidably arranged on the lifting forging and pressing mechanism, and the rotary shifting mechanism is rotatably arranged on the lifting forging and pressing mechanism. A workpiece is intermittently shifted in the single direction and with the uniform amplitude through the lifting motion of the forging press, and the frame type rack can drive the rotating main shaft to rotate in the ascending and descending processes, so that the workpiece is prevented from being shifted in a reciprocating mode through reciprocating rotation of the shifting wheel shaft; the invention further creatively provides a sequence type three-way valve and a lifting forging and pressing mechanism, contact and separation of the poking wheel shaft and the workpiece are automatically achieved by controlling the flowing sequence of the flow limiting connector and the flow dividing connector, and then the technical effect of one-way poking is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of forging of shaft parts, and in particular refers 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 machine. The forging machine uses a hammer or a die to reciprocate and extrude the workpiece. 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 forging of the workpiece requires it to have a certain temperature. However, the workpiece taken out of the furnace will cool down quickly, so the time it can be used for forging is not long. After cooling down, it needs to be returned to the furnace for heating for a long time. Therefore, the forging frequency has a great influence on the overall production efficiency of the workpiece. For larger shaft workpieces, it is difficult to manually control the rotation in the forging gap, and 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 hold the workpiece 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 intermittently shift the workpiece in a unidirectional manner and with uniform amplitude 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 processes, in order to avoid the reciprocating rotation of the toggle wheel axle to reciprocate the workpiece, the present invention also creatively proposes a sequential three-way valve and a lifting and 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 toggle.

[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 and forging mechanism, an automatic lifting mechanism, a rotating toggle mechanism and a sequential three-way valve, wherein the automatic lifting mechanism is slidably arranged on the lifting and forging mechanism, and the rotating 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, 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] During the forging lifting process by the lifting forging mechanism, the workpiece can be automatically toggled and rotated in a single direction and with a small amplitude, so as to realize continuous forging of shaft-like workpieces. The automatic rotation method can not only relatively evenly control the rotation angle each time, 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 shunt joint. The external pump supplies liquid into the sequential three-way valve or extracts the liquid in the sequential three-way valve through the first joint. A valve for increasing the flow resistance of the liquid is arranged in the flow-limiting joint. The flow-limiting joint is used to drive the forging drive assembly, and the shunt joint is used to drive the shunt drive assembly.

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

[0010] As a further preference of the present invention, the lifting guiding assembly includes a base, a main bottom plate, vertical sliders and a frame-shaped rack. The main bottom plate is arranged on the base. Vertical guide rods are arranged in an array on the main bottom plate. The vertical sliders are snap-fitted and slidably arranged on the vertical guide rods. The frame-shaped rack is fixedly connected to the vertical sliders.

[0011] Preferably, the forging drive assembly includes a main machine shell, a forging cylinder, a return guide rod and a return spring. The main machine shell is arranged on the main bottom plate. The first joint and the forging cylinder are connected through a hydraulic pipeline in a penetrating manner. The forging cylinder is arranged at the inner top of the main machine shell. The return guide rod is arranged on the main bottom plate. The frame-shaped rack is slidably arranged on the return guide rod. The return spring is arranged between the main bottom plate and the frame-shaped rack.

[0012] As a further preference of the present invention, the shunt drive assembly includes a shunt cylinder body, a telescopic part, a transfer top block and a return spring. The shunt cylinder body is fixedly connected to the frame-shaped rack through a bracket. The shunt joint and the shunt cylinder body are connected through a hydraulic pipeline in a penetrating manner. The telescopic part is telescopically arranged in the shunt cylinder body. The transfer top block is slidably arranged on the frame-shaped rack. Wings are symmetrically arranged on both sides of the transfer top block. One end of the return spring is arranged on the wing. The other end of the return spring is provided with a spring mounting seat, and the spring mounting seat is fixedly connected to the frame-shaped rack.

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

[0014] Further, the automatic lifting mechanism includes a lifting base plate, lifting brackets, lifting rods and lifting springs. The lifting base plate is located in the base. The lifting brackets are symmetrically arranged on the lifting base plate. The top of the lifting brackets is provided with pressing parts. An inclined branch part is also provided at the middle position of the lifting brackets. The lifting rods are rotatably arranged on the inclined branch parts. The lifting springs are arranged between the lifting base plate and the base.

[0015] By the telescopic movement of the shunt cylinder body, the relative position between the lifting brackets and the frame-type rack can be changed, so as to control the contact and separation between the workpiece and the dialing wheel shaft. Since the rotating main shaft rotates in both the rising and falling stages, the one-way rotating dialing of the workpiece by the dialing wheel shaft can be realized through the contact and separation between the workpiece and the dialing wheel shaft.

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

[0017] Preferably, the rotary assembly includes bearings, a rotating main shaft, a hoisting plate and a rotating sub-shaft. The bearings are arranged in the frame-type rack. The rotating main shaft is rotatably arranged in the bearings. The hoisting plate is fixedly connected to the frame-type rack. The rotating sub-shaft is rotatably arranged in the hoisting plate.

[0018] As a further preference of the present invention, the transmission assembly includes a driving bevel gear, a driven bevel gear, a dialing 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 sub-shaft. The driving bevel gear and the driven bevel gear are in meshing transmission. The dialing wheel shaft is rotatably arranged in the hoisting plate. The rotating sub-shaft and the dialing wheel shaft are in transmission connection through the synchronous transmission mechanism.

[0019] Preferably, the two rotating main shafts are symmetrically distributed about the center. The two driving bevel gears are located on the same side of the workpiece. Therefore, the two dialing wheel shafts rotate in the same direction.

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

[0021] As a further preferred embodiment of the present invention, the adjustable self-driving 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 meshed for transmission.

[0022] By adjusting the position of the spur gear on the rotating spindle, the spur gear can be meshed 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: (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 prevent the wheel axle from moving the workpiece during the downward pressing process. On the other hand, during the bottom forging, the lifting bracket can be retracted to separate the lifting rod and the workpiece. 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.

[0024] (2) During the forging and pressing process, the lifting and lowering forging mechanism can automatically rotate the workpiece in a single direction with a small amplitude, 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.

[0025] (3) Since the flow resistance of the liquid in the flow limiting joint and the flow diverter joint is different, when the first joint supplies liquid to the sequential three-way valve, the liquid will first enter the flow diverter joint. When the liquid in the flow 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 flow diverter joint will still first flow back into the sequential three-way valve. When the liquid in the flow diverter joint cannot flow back, the liquid in the flow limiting joint will flow back into the sequential three-way valve.

[0026] (4) By the expansion and contraction of the shunt cylinder block, the relative position between the lifting bracket and the frame type rack can be changed, thereby controlling the contact and separation between the workpiece and the dial wheel shaft. Since the rotating main shaft rotates in both the ascending and descending stages, the one-way rotating dialing of the workpiece by the dial wheel shaft can be achieved through the contact and separation between the workpiece and the dial wheel shaft.

[0027] (5) During the ascending and descending processes of the rotating main shaft, there will be a stage of being dialed and rotated, thus driving the dial wheel shaft to rotate. However, since the rotating main shaft rotates reciprocally, in order to prevent the dial wheel shaft from also reciprocally dialing the workpiece, through the expansion and contraction of the shunt cylinder block, the contact and separation between the workpiece and the dial wheel shaft can be controlled during the lifting and lowering processes, achieving the technical objectives of not dialing the workpiece during descent (improving stability) and dialing the workpiece after forging (switching the forging angle). BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a perspective view of a clamping device for a forging press for shaft forging processing proposed by the present invention; Figure 2 is a front view of a clamping device for a forging press for shaft forging processing proposed by the present invention; Figure 3 is Figure 2 a sectional view along the cutting line A-A in Figure 4 is Figure 3 a sectional view along the cutting line B-B in Figure 5 is Figure 2 a sectional view along the cutting line C-C in Figure 6 is Figure 3 a sectional view along the cutting line D-D in Figure 7 is an exploded structural schematic diagram of a clamping device for a forging press for shaft forging processing proposed by the present invention; Figure 8 is Figure 3 a partial enlarged view of part Ⅰ in Figure 9 is Figure 4 a partial enlarged view of part Ⅱ in Figure 10 is Figure 5 a partial enlarged view of part Ⅲ in Figure 11 is Figure 5 a partial enlarged view of part Ⅳ in Figure 12 is Figure 6 a partial enlarged view of part Ⅴ in Figure 13 is a schematic diagram of an optional structural form between the frame type rack and the upper die.

[0029] 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 bottom plate, 10. vertical slider, 11. frame frame, 12. main housing, 13. forging cylinder, 14. lifting guide rod, 15. lifting spring, 16. diverter cylinder body, 17. telescopic part, 18. transfer top block, 19. reset spring, 20. vertical guide rod, 21. spring mounting seat, 22. lifting bottom 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-driving assembly, 31. Bearing, 32. Rotating main shaft, 33. Lifting plate, 34. Rotating secondary shaft, 35. Active bevel gear, 36. Driven bevel gear, 37. Driving axle, 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.

[0030] 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

[0031] 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.

[0032] 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, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0033] like Figures 1 to 12As shown, the present invention proposes a forging machine clamping device for shaft forging processing, including a lifting and 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 and forging mechanism 1, and the rotary toggle mechanism 3 is rotatably arranged on the lifting and forging mechanism 1; the lifting and 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.

[0034] By lifting and lowering the forging mechanism 1, the workpiece can be automatically rotated 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.

[0035] The sequential three-way valve 4 is provided with a first joint 45, a flow limiting joint 46 and a flow diversion 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 component 6, and the flow diversion joint 47 is used to drive the flow diversion drive component 7.

[0036] 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 flow back into the sequential three-way valve 4 first. 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.

[0037] 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 fixedly connected to the vertical slider 10.

[0038] The forging drive assembly 6 includes a main housing 12, a forging cylinder 13, a return guide rod 14 and a return 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 on the inner top of the main housing 12, the return guide rod 14 is arranged on the main base plate 9, the frame frame 11 is slidably arranged on the return guide rod 14, and the return spring 15 is arranged between the main base plate 9 and the frame frame 11.

[0039] The shunt drive assembly 7 includes a shunt cylinder block 16, a telescopic part 17, an adapter top block 18 and a return spring 19. The shunt cylinder block 16 is fixedly connected to the frame type rack 11 through a bracket. The shunt joint 47 and the shunt cylinder block 16 are connected through a hydraulic pipeline. The telescopic part 17 is telescopically arranged in the shunt cylinder block 16. The adapter top block 18 is slidably arranged on the frame type rack 11. Wing plates are symmetrically arranged on both sides of the adapter top block 18. One end of the return spring 19 is arranged on the wing plate, and the other end of the return spring 19 is provided with a spring mounting seat 21. The spring mounting seat 21 is fixedly connected to the frame type rack 11.

[0040] The upper die for forging is arranged at the end of the forging cylinder 13 and can slide slightly relative to the frame type rack 11. The lower die is arranged on the main bottom plate 9. Through the shunt control of the sequential three-way valve 4, when pressing down, the shunt cylinder block 16 can extend prior to the forging cylinder 13, and when rising, the shunt cylinder block 16 can also retract prior to the forging cylinder 13.

[0041] The automatic lifting mechanism 2 includes a lifting bottom plate 22, lifting brackets 23, lifting rods 24 and lifting springs 25. The lifting bottom plate 22 is located in the base 8. The lifting brackets 23 are symmetrically arranged on the lifting bottom plate 22. A pressing part 26 is arranged at the top of the lifting brackets 23. An inclined branch part 27 is also arranged at the middle position of the lifting brackets 23. The lifting rods 24 are rotatably arranged on the inclined branch part 27. The lifting springs 25 are arranged between the lifting bottom plate 22 and the base 8.

[0042] By the telescoping of the shunt cylinder block 16, the relative position between the lifting brackets 23 and the frame type rack 11 can be changed, thereby controlling the contact and separation between the workpiece and the dialing wheel shaft 37. Since the rotating main shaft 32 rotates in both the rising and falling stages, the one-way rotating dialing of the workpiece by the dialing wheel shaft 37 can be achieved through the contact and separation between the workpiece and the dialing wheel shaft 37.

[0043] The rotary dialing mechanism 3 includes a rotating assembly 28, a transmission assembly 29 and an adjustable self-driving assembly 30. The rotating assembly 28 is rotatably arranged in the frame type rack 11. The transmission assembly 29 is arranged on the rotating assembly 28. The adjustable self-driving assembly 30 is arranged on the rotating assembly 28.

[0044] The rotating assembly 28 includes a bearing 31, a rotating main shaft 32, a hoisting plate 33 and a rotating sub-shaft 34. The bearing 31 is arranged in the frame type rack 11. The rotating main shaft 32 is rotatably arranged in the bearing 31. The hoisting plate 33 is fixedly connected to the frame type rack 11. The rotating sub-shaft 34 is rotatably arranged in the hoisting plate 33.

[0045] 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 arranged on the rotating main shaft 32, and the driven bevel gear 36 is arranged on the rotating secondary shaft 34. The driving bevel gear 35 and the driven bevel gear 36 are meshed for transmission. The toggle wheel shaft 37 is rotatably arranged 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.

[0046] The two rotating spindles 32 are centrally symmetrically distributed, 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.

[0047] During the rising and falling process, the rotating main shaft 32 will have a stage of being driven and rotated, thereby rotating the driving wheel shaft 37. However, since the rotating main shaft 32 rotates reciprocatingly, in order to prevent the driving wheel shaft 37 from driving the workpiece back and forth, the contact and separation of the workpiece and the driving wheel shaft 37 can be controlled by extending and retracting the diverter cylinder 16 during the lifting process, thereby achieving the technical purpose of not driving the workpiece during descent (improving stability) and driving the workpiece after forging (switching the forging angle).

[0048] The adjustable self-driving component 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 meshed for transmission.

[0049] By adjusting the position of the spur gear 42 on the rotating spindle 32, the spur gear 42 can be meshed with racks of different lengths in a lifting manner, thereby changing the rotation amplitude of the workpiece in a single forging cycle.

[0050] 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 relatively 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.

[0051] During specific use, first take the shaft forgings out of the heating furnace through the external mechanical claws, and place them horizontally into the 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 resists the toggle wheel shaft 37.

[0052] 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 diverting 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 diverting joint 47. When the liquid in the flow diverting joint 47 cannot flow, the liquid will enter the flow limiting joint 46. During this process, the telescopic part 17 in the flow-dividing cylinder body 16 will be extended to the limit position first by the driving type of the liquid in the flow-dividing joint 47, and then the flow-limiting joint 46 can push the forging cylinder 13 to extend. Since the telescopic part 17 has been extended at this time, the telescopic part 17 will first press the lifting bracket 23 down to a certain extent through the adapter top block 18, and separate the workpiece and the toggle wheel shaft 37; 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.

[0053] 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 frame 11. Therefore, during the extension of the forging cylinder 13, the frame frame 11 is first pushed down. When the frame frame 11 is lowered to the limit position (that is, the toggle wheel shaft 37 is in contact with the workpiece, and the workpiece is against the lower die), the continued extension of the forging cylinder 13 will push the upper die to independently descend a small range, thereby achieving forging of the workpiece. 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 been 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.

[0054] When rising, the liquid in the sequential three-way valve 4 is extracted by an external pump, and at this time, the liquid in the diverter joint 47 is still preferentially returned to the sequential three-way valve 4. When the liquid in the diverter joint 47 cannot be returned, the liquid in the flow limiting joint 46 will return to the sequential three-way valve 4. After losing the pressure of the transfer top block 18, the lifting bracket 23 will rise under the pulling force of the lifting spring 25, and lift the workpiece together through the lifting rod 24 until the workpiece abuts against the dial wheel shaft 37. Subsequently, the lifting rod 24 and the workpiece will rise together with the frame type rack 11 during the contraction of the forging cylinder 13. During this process, the frame type rack 11 is driven by the elastic force of the return spring 15. During the rising process of the frame type rack 11, the spur gear 42 will pass by the rack and be driven to rotate by the rack. When the spur gear 42 drives the rotating main shaft 32 to rotate through the adjusting nut 40, the rotating sub-shaft 34 will also rotate through the transmission between the driving bevel gear 35 and the driven bevel gear 36. And the rotating sub-shaft 34 can drive the dial wheel shaft 37 to rotate through the synchronous transmission mechanism 38. Since the workpiece always abuts against the dial wheel shaft 37 during this process, the workpiece will be rotated by a certain amplitude at this time. The two rotating main shafts 32 are symmetrically distributed about the center, and the two driving bevel gears 35 are located on the same side of the workpiece. Therefore, the rotating directions of the two dial wheel shafts 37 are the same.

[0055] Repeatedly controlling the lifting of the lifting and forging mechanism 1 can realize the reciprocating forging of the workpiece, and rotate the workpiece unidirectionally and evenly in small amplitudes during the forging gap.

[0056] If you want to change the amplitude of a single rotation of the workpiece, when the spur gear 42 is not engaged with the rack, manually rotate the locking ring 41 to make the elastic bifurcated part 44 relax and expand, and then rotate the adjusting nut 40 to change the axial position of the adjusting nut 40 in the rotating main shaft 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 make the elastic bifurcated part 44 tighten and clamp the rotating main shaft 32, and the locking between the adjusting nut 40 and the rotating main shaft 32 can be realized.

[0057] It should be noted that in this article, relational terms such as first and second are only used 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0058] The above describes the present invention and its embodiments. Such description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In general, if those of ordinary skill in the art are inspired by it and, without departing from the spirit of the present invention, design similar structural forms and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A clamping device for a forging press used in shaft forging, characterized in that: It comprises a lifting and forging mechanism (1), an automatic lifting mechanism (2), a rotary toggle mechanism (3) and a sequential three-way valve (4), wherein the automatic lifting mechanism (2) is slidably arranged on the lifting and forging mechanism (1), and the rotary toggle mechanism (3) is rotatably arranged on the lifting and forging mechanism (1); The lifting and forging mechanism (1) comprises a lifting guide assembly (5), a forging drive assembly (6) and a flow diversion drive assembly (7), wherein 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 flow diversion drive assembly (7) is arranged on the lifting guide assembly (5); The sequential three-way valve (4) is provided with a first joint (45), a flow-limiting joint (46) and a flow-dividing joint (47); an external pump supplies liquid into the sequential three-way valve (4) or extracts liquid from the sequential three-way valve (4) through the first joint (45); a valve for increasing the flow resistance of the liquid is provided in the flow-limiting joint (46); the flow-limiting joint (46) is used to drive the forging drive component (6); and the flow-dividing joint (47) is used to drive the flow-dividing drive component (7).

2. The clamping device for a forging press used in shaft forging processing according to claim 1, wherein: The lifting guide assembly (5) comprises 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 slidably engaged on the vertical guide rods (20); and the frame frame (11) is fixedly connected to the vertical slider (10).

3. The forging press clamping device for shaft forging processing according to claim 2, wherein: The automatic lifting mechanism (2) comprises 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); the lifting bracket (23) is symmetrically arranged on the lifting base plate (22); a pressing portion (26) is provided at the top of the lifting bracket (23); an oblique branch portion (27) is also provided at the middle position of the lifting bracket (23); the lifting rod (24) is rotatably arranged on the oblique branch portion (27); and the lifting spring (25) is arranged between the lifting base plate (22) and the base (8).

4. The forging press clamping device for shaft forging processing according to claim 2, wherein: The rotary toggle mechanism (3) comprises a rotary assembly (28), a transmission assembly (29) and an adjustable self-driving assembly (30); the rotary assembly (28) is rotatably disposed in the frame frame (11); the transmission assembly (29) is disposed on the rotary assembly (28); and the adjustable self-driving assembly (30) is disposed on the rotary assembly (28).

5. The forging press clamping device for shaft forging processing according to claim 4, characterized in that: The rotating assembly (28) comprises 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).

6. The clamping device for a forging press used in shaft forging according to claim 5, characterized in that: The transmission assembly (29) comprises 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 arranged on a rotating main shaft (32); the driven bevel gear (36) is arranged on a rotating secondary shaft (34); the driving bevel gear (35) and the driven bevel gear (36) are meshed for transmission; the toggle wheel shaft (37) is rotatably arranged in a hanging plate (33); the rotating secondary shaft (34) and the toggle wheel shaft (37) are connected in transmission via the synchronous transmission mechanism (38).

7. The clamping device for a forging press used in shaft forging processing according to claim 6, wherein: The two rotating spindles (32) are centrally symmetrically distributed, and the two active bevel gears (35) are located on the same side of the workpiece, so the two shifting wheel shafts (37) rotate in the same direction.

8. A clamping device for a forging press used in shaft forging processing according to claim 7, characterized in that: The adjustable self-driving assembly (30) comprises a rack support (39), an adjusting nut (40), a locking ring (41) and a spur gear (42); the rack support (39) is arranged on a main base plate (9); racks of different lengths are arranged side by side on the rack support (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); the spur gear (42) and the rack on the rack support (39) are meshed for transmission.

9. The clamping device for a forging press used in shaft forging according to claim 3, wherein: The forging drive assembly (6) comprises 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 a 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 on 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).

10. A forging press clamping device for shaft forging processing according to claim 9, characterized in that: The flow splitter drive assembly (7) comprises a flow splitter cylinder (16), a telescopic portion (17), a transfer top block (18) and a return spring (19); the flow splitter cylinder (16) is fixedly connected to the frame frame (11) via a bracket; the flow splitter joint (47) and the flow splitter cylinder (16) are connected via a hydraulic pipeline; the telescopic portion (17) is telescopically arranged in the flow splitter cylinder (16); the transfer top block (18) is slidably arranged on the frame frame (11); wing plates are symmetrically arranged on both sides of the transfer top block (18); one end of the return spring (19) is arranged on the wing plate; the other end of the return spring (19) is provided with a spring mounting seat (21); and the spring mounting seat (21) is fixedly connected to the frame frame (11).

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