Forging device for gearbox belt wheel shaft machining

Abstract

The invention relates to the technical field of belt wheel shaft forging, in particular to a forging device for gearbox belt wheel shaft machining. Comprising a stamping base; the stamping head is arranged on the stamping base, and a die is detachably and fixedly connected to the stamping base; the first elastic push rod is fixedly connected to the stamping base, the telescopic end of the first elastic push rod is in extrusion fit with the stamping head, and the stamping base is fixedly connected with a second elastic push rod; the fixed ring is fixedly connected to the stamping base, and the stamping base is rotationally connected with a rotating ring; and the elastic supporting frames are slidably connected between the fixed rings and the adjacent rotating rings, and the telescopic ends of the elastic supporting frames are fixedly connected with attaching plates. Through cooperation of the fixed ring and the rotating ring, the attaching plate at the telescopic end of the elastic supporting frame applies supporting force to the exterior of the die, part of acting force generated during forging in the die is counteracted, stress damage to the die is reduced, the service life of the die is prolonged, and the fracture probability is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pulley shaft forging, and in particular to a forging device for processing a gearbox pulley shaft. Background Art

[0002] The gearbox pulley shaft is an important component that transmits the power of the engine to other parts of the gearbox through the transmission belt to realize the power transmission and speed change function. Most of them are cylindrical or stepped cylindrical. The pulley shaft needs to be forged during the preparation process, that is, a processing method in which a forging machine is used to apply pressure to the metal blank to cause it to undergo plastic deformation to obtain a forging with certain mechanical properties, a certain shape and size. Forging is divided into free forging and die forging according to the processing method. Die forging is to place a metal blank in a mold with a certain shape, and to obtain a forging by causing the blank to undergo plastic deformation under the action of impact force or pressure. Due to its high production efficiency and high dimensional accuracy of forgings, it is suitable for mass production and is widely used. When the existing die forging device forges the stepped cylindrical pulley shaft, the metal blank is plastically deformed by the extrusion force and fits the mold. During this process, the pulley shaft will exert force on the mold, causing residual stress inside the mold. After long-term use, the residual stress inside the mold will gradually add up to the bearing limit of the mold, causing the mold to break, resulting in failure of the pulley shaft forging. Summary of the invention

[0003] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides a forging device for machining a gearbox pulley shaft.

[0004] The technical implementation scheme of the present invention is: a forging device for processing a gearbox pulley shaft, comprising: Stamping base; A punching head is arranged on the punching base, a mold is detachably fixed to the punching base, and the punching head contacts and cooperates with the mold; A first elastic push rod is fixedly connected to the stamping base, the telescopic end of the first elastic push rod is extruded and matched with the stamping head, the stamping base is fixedly connected to a second elastic push rod, the fixed portion of the second elastic push rod is fixedly connected to the fixed portion of the first elastic push rod and is connected by a connecting pipe, and the telescopic end of the second elastic push rod is provided with an extrusion rod; There are a plurality of fixed rings fixedly connected to the stamping base, the stamping base is rotatably connected to the same number of rotating rings as the fixed rings, and all the fixed rings and all the rotating rings are alternately distributed; There are several elastic support frames, all of which are slidably connected between the fixed ring and the adjacent rotating ring, and the telescopic ends of the elastic support frames are fixedly connected with bonding plates that are bonded to the mold; Transmission assemblies, the number of which is the same as that of the fixed rings, are arranged on the stamping base and are used to drive the rotating rings to rotate in sequence; A self-locking component is arranged on the stamping base and is used to lock the telescopic end of the first elastic push rod.

[0005] Preferably, the inner diameter of the first elastic push rod is larger than the inner diameter of the second elastic push rod, so as to expand the sliding distance of the telescopic end of the second elastic push rod.

[0006] Preferably, the circumferentially distributed elastic support frames are distributed at equal intervals, and the bonding plates at the telescopic ends of the elastic support frames are inclined. The inclination directions of the bonding plates on all the elastic support frames at the same height are consistent, and the inclination directions of the bonding plates on two adjacent elastic support frames at different heights are opposite.

[0007] Preferably, the transmission assembly comprises: The rack racks have the same number as the fixing rings and are distributed vertically, the stamping base is fixedly connected with a first connecting piece, and the rack racks are slidably connected to the first connecting piece of the stamping base; A trigger plate, disposed on the rack, the trigger plate being extruded and matched with the extrusion rod; The arc-shaped toothed ring is fixedly connected to the rotating ring, and the arc-shaped toothed ring is meshed with the adjacent rack frame.

[0008] Preferably, the self-locking component comprises: A sawtooth rod, fixedly connected to the telescopic end of the first elastic push rod; A limiting shaft, the stamping base is fixedly connected to a second connecting piece, the limiting shaft is slidably connected to the second connecting piece of the stamping base, the sawtooth rod is limitedly matched with the limiting shaft, and a first elastic element is arranged between the limiting shaft and the second connecting piece; A shedding assembly is arranged on the stamping base and is used for separating the pulley shaft from the mold.

[0009] Preferably, the shedding component comprises: An electric push rod, fixedly connected to the stamping base; The stripping module is sealingly and slidably connected to the interior of the mold, and the stripping module is in contact with and matched with the telescopic end of the electric push rod.

[0010] Preferably, the limiting shaft is fixedly connected to a first extrusion frame, the telescopic end of the electric push rod is fixedly connected to a second extrusion frame, and the first extrusion frame is extrusion-fitted with the second extrusion frame.

[0011] As a preferred embodiment, it also includes: The blocking components, the number of which is the same as that of the rack racks, are arranged on the adjacent rack racks, and the blocking components are used for the trigger plate to delay pushing the rack rack to slide, and the blocking components include: A second elastic element is disposed between the rack and the trigger plate, and the rack and the trigger plate are slidably connected; A clamping block is fixedly connected to the rack frame, and the stamping base is rotatably connected to the limiting member through a first connecting member; The third elastic element has two parts and is symmetrically distributed around the center. The third elastic element is disposed between the limiting member and the first connecting member. The limiting member is pressed and matched with the clamping block.

[0012] As a preferred embodiment, it also includes: The self-adjusting component is arranged on the stamping base and is used to adjust the supporting force of the laminating plate on the telescopic end of the elastic support frame on the outside of the mold. The self-adjusting component includes: A sliding rod, fixedly connected to the extrusion rod, wherein the extrusion rod is slidably connected to the telescopic end of the second elastic push rod; The fourth elastic element is arranged between the extrusion rod and the telescopic end of the second elastic push rod. The stamping base is fixedly connected with an extrusion plate, and the sliding rod is in contact with the extrusion plate.

[0013] Preferably, the extruded plate is in a stepped shape, and the thickness gradually increases from short to long step lengths, that is, A<B<C.

[0014] Compared with the prior art, the present invention has the following advantages: 1. By cooperating with the fixed ring and the rotating ring, the bonding plates at the telescopic ends of several elastic support frames apply a supporting force to the outside of the mold, offsetting part of the force generated inside the mold during forging, reducing stress damage to the mold, extending the service life of the mold, and reducing the probability of breakage.

[0015] 2. By moving the extrusion rod from bottom to top, and driving the rotating ring to rotate in sequence through the trigger plate, rack rack and arc-shaped gear ring, the outer side of the mold applies supporting force from bottom to top in sequence in accordance with the order in which the stepped pulley shaft is compressed and deformed and contacts the inner wall of the mold.

[0016] 3. The rack rack is delayed from sliding behind the trigger plate by cooperating with the one-way clamping shaft and the clamping block, so that the force exerted by the pulley shaft on the inner wall of the mold and the supporting force on the outside of the mold act synchronously, avoiding the bonding plate at the telescopic end of the elastic support frame exerting supporting force on the outside of the mold preferentially, resulting in internal stress concentration and damage to the mold.

[0017] 4. When the force applied to the mold by the pulley shaft is gradually reduced, the supporting force of the elastic support frame's telescopic end bonding plate on the mold is simultaneously reduced, so that the stress inside the mold is maintained in a fixed state, reducing the probability of the mold being broken due to the internal stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic cross-sectional view of the three-dimensional structure of the stamping base of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the rack rack and the trigger plate of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the fixed ring and the rotating ring of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the sawtooth rod and the limiting shaft of the present invention; Figure 6 is a schematic diagram of the three-dimensional structure of the second elastic element of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the one-way clamping shaft and the third elastic element of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the sliding rod and the fourth elastic element of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the extruded plate of the present invention.

[0019] The markings of the components in the accompanying drawings are as follows: 1: stamping base, 2: stamping head, 3: mold, 4: first elastic push rod, 5: second elastic push rod, 6: extrusion rod, 7: fixed ring, 8: rotating ring, 9: elastic support frame, 201: rack frame, 202: trigger plate, 203: arc gear ring, 301: sawtooth rod, 302: limit shaft, 303: first elastic element, 304: electric push rod, 305: stripping module, 306: first extrusion frame, 307: second extrusion frame, 401: second elastic element, 402: block, 403: limit member, 404: third elastic element, 501: sliding rod, 502: fourth elastic element, 503: extrusion plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] When the existing die forging device forges the stepped cylindrical pulley shaft, the metal blank undergoes plastic deformation and fits the die under the action of the extrusion force. In this process, the pulley shaft exerts force on the die, resulting in residual stress inside the die. As time goes by and the die is repeatedly used, these internal residual stresses will gradually accumulate and eventually reach the limit that the die can withstand, thereby causing the die to break, resulting in failure of the pulley shaft forging.

[0022] A forging device for processing a gearbox pulley shaft, such as Figure 1-Figure 3 As shown, it includes: a stamping base 1; a stamping head 2, which is arranged on the stamping base 1, and a mold 3 is detachably fixedly connected to the stamping base 1, and the stamping head 2 is in contact with the mold 3; a first elastic push rod 4, which is fixedly connected to the stamping base 1, and the telescopic end of the first elastic push rod 4 is pressed and matched with the stamping head 2, and the stamping base 1 is fixedly connected to the second elastic push rod 5, and the fixed part of the second elastic push rod 5 is fixedly connected to the fixed part of the first elastic push rod 4 and connected with a connecting pipe, the inner diameter of the first elastic push rod 4 is larger than the inner diameter of the second elastic push rod 5, and the telescopic end of the second elastic push rod 5 is provided with an extrusion rod 6; a plurality of fixing rings 7 are fixedly connected to the stamping base 1, and the stamping base 1 is rotatably connected with the same number of rotating rings 8 as the fixing rings 7, and all The fixed rings 7 and all the rotating rings 8 are distributed alternately; there are several elastic support frames 9, all of which are slidably connected between the fixed ring 7 and the adjacent rotating ring 8, and the telescopic ends of the elastic support frames 9 are fixedly connected with bonding plates that fit with the mold 3; the circumferentially distributed elastic support frames 9 are distributed at equal intervals, and the bonding plates at the telescopic ends of the elastic support frames 9 are tilted, the inclination directions of the bonding plates on all elastic support frames 9 at the same height are consistent, and the inclination directions of the bonding plates on two adjacent elastic support frames 9 at different heights are opposite; the transmission assembly, which is the same in number as the fixed ring 7, is arranged on the stamping base 1, and is used to drive the rotating ring 8 to rotate in sequence; the self-locking assembly is arranged on the stamping base 1, and the self-locking assembly is used to lock the telescopic end of the first elastic push rod 4.

[0023] In the above scheme, a hydraulic drive device is provided on the stamping base 1, which is used to drive the stamping head 2 to move up and down so as to forge the pulley shaft. The fixed parts of the first elastic push rod 4 and the second elastic push rod 5 are filled with hydraulic oil, and the connecting pipe between the two is also filled with hydraulic oil. The fixed ring 7 is provided with a plurality of straight grooves distributed at equal intervals in the circumferential direction, and the number is adjusted accordingly according to the uniformity of support for the outside of the mold 3. The rotating ring 8 is provided with inclined grooves distributed at equal intervals in the circumferential direction and with the same number of straight grooves. The elastic support frame 9 is located between the straight grooves on the fixed ring 7 and the inclined grooves of the adjacent rotating ring 8. The elastic support frame 9 is an elastic telescopic rod, and the telescopic end slides along the fixed part to accumulate the supporting force of the bonding plate on the telescopic end of the elastic support frame 9 on the outside of the mold 3, thereby offsetting part of the force of the pulley shaft on the mold 3, reducing the residual stress in the mold, extending the service life of the mold 3, and reducing the probability of breakage of the mold 3. The bonding plate at the telescopic end of the elastic support frame 9 is tilted to increase the supporting area with the outer wall of the mold 3 and improve the supporting strength.

[0024] Specifically, Figure 1-Figure 4 As shown, the transmission assembly includes: a rack frame 201, the number of which is the same as that of the fixed ring 7, the stamping base 1 is fixedly connected with a first connecting piece, the rack frame 201 is vertically distributed and slidably connected to the first connecting piece of the stamping base 1; a trigger plate 202 is arranged on the rack frame 201, and the trigger plate 202 is extruded and matched with the extrusion rod 6; an arc-shaped toothed ring 203, fixedly connected to the rotating ring 8, and the arc-shaped toothed ring 203 is meshed with the adjacent rack frame 201.

[0025] In the above scheme, the number of racks 201 is adjusted accordingly according to the number of different diameters of the forged stepped pulley shaft, and the vertical length of the extrusion rod 6 can completely cover the plurality of trigger plates 202 arranged vertically, so that the extrusion rod 6 can trigger all the trigger plates 202 in sequence and maintain the trigger state of all the trigger plates 202, and the extrusion rod 6 moves from bottom to top in accordance with the order in which the pulley shaft is compressed and deformed and contacts the inner wall of the mold 3, so that the outside of the mold 3 applies supporting force in sequence from bottom to top, thereby reducing the residual stress inside the mold 3.

[0026] Specifically, Figure 2 and Figure 5 As shown, the self-locking component includes: a serrated rod 301, fixedly connected to the telescopic end of the first elastic push rod 4; a limiting shaft 302, the stamping base 1 is fixedly connected to the second connecting piece, the limiting shaft 302 is slidably connected to the second connecting piece of the stamping base 1, the serrated rod 301 and the limiting shaft 302 are limitedly matched, and a first elastic element 303 is arranged between the limiting shaft 302 and the second connecting piece; a shedding component, arranged on the stamping base 1, is used to separate the pulley shaft from the mold 3.

[0027] In the above scheme, the serrated rod 301 on the telescopic end of the first elastic push rod 4 cooperates with the limit shaft 302, thereby unidirectionally jamming the telescopic end of the first elastic push rod 4, to avoid the telescopic end of the first elastic push rod 4 being reset first after the forging is completed and the pulley shaft is not demolding, resulting in the external supporting force of the mold 3 taking precedence over the internal force, causing the internal stress of the mold 3 to increase. The first elastic element 303 is a tension spring, and the first elastic element 303 is used to drive the limit shaft 302 to reset.

[0028] Specifically, Figure 2 and Figure 5 As shown, the shedding assembly includes: an electric push rod 304, which is fixedly connected to the stamping base 1; a stripping module 305, which is sealingly and slidably connected to the inside of the mold 3, and the stripping module 305 is in contact and matched with the telescopic end of the electric push rod 304; the limiting shaft 302 is fixedly connected to the first extrusion frame 306, and the telescopic end of the electric push rod 304 is fixedly connected to the second extrusion frame 307, and the first extrusion frame 306 is extruded and matched with the second extrusion frame 307.

[0029] In the above scheme, the telescopic end of the electric push rod 304 is not in contact with the demolding module 305 in its initial state, and the demolding module 305 is located inside the mold 3. The mold 3 has a vertical limit on the demolding module 305, so that the force of the pulley shaft during forging acts on the mold 3 body. After forging is completed, the telescopic end of the electric push rod 304 drives the pulley shaft to be demolded through the demolding module 305. The first extrusion frame 306 has an inclined surface, and the second extrusion frame 307 is provided with an inclined surface that matches the inclined surface of the first extrusion frame 306, so that when the telescopic end of the electric push rod 304 moves upward, it simultaneously drives the second extrusion frame 307 to extrude the first extrusion frame 306, and the limit shaft 302 is separated from the serrated rod 301, so that the resetting of the telescopic end of the first elastic push rod 4 and the demolding of the pulley shaft are carried out simultaneously.

[0030] When it is necessary to forge the stepped pulley shaft, the staff places the high-temperature pulley shaft (with a certain plasticity) in the die 3. At this time, the top of the pulley shaft is higher than the die 3. Then the hydraulic drive device on the stamping base 1 is turned on to drive the punch head 2 to move downward until the punch head 2 contacts the pulley shaft in the die 3. At this time, the punch head 2 is in synchronous contact with the telescopic end of the first elastic push rod 4. Then the punch head 2 continues to move downward to forge the pulley shaft. At this time, the pulley shaft begins to deform due to the extrusion force of the punch head 2. The height of the pulley shaft gradually decreases, and the diameter of its cross section gradually increases. At the same time, the punch head 2 drives the telescopic end of the first elastic push rod 4 to move downward, so that the hydraulic oil in the fixed part of the first elastic push rod 4 enters the fixed part of the second elastic push rod 5 along the connecting pipe. At this time, the hydraulic oil in the fixed part of the second elastic push rod 5 pushes its telescopic end to slide upward, so that the telescopic end of the second elastic push rod 5 drives the extrusion rod 6 thereon to move synchronously, and the extrusion rod 6 squeezes the trigger plate 202 at the bottom, so that the trigger plate 202 is driven by the extrusion force to drive the adjacent rack 201 along the first The first connecting piece slides, and the rack frame 201 drives the rotating ring 8 to rotate through the arc-shaped toothed ring 204, so that the rotating ring 8 drives the fixed parts of several adjacent circumferentially distributed elastic support frames 9 to slide inward. Since the fitting plate on the telescopic end of the elastic support frame 9 fits the inner wall of the mold 3, the telescopic end of the elastic support frame 9 slides along its fixed part, so that the elastic support frame 9 accumulates elastic force and gradually increases the supporting force on the outside of the mold 3 until the extrusion rod 6 moves upward to the top of the trigger plate 202. At this time, the trigger plate 202 drives the rack frame 201 to stop sliding, that is, the elastic The elastic support frame 9 stops accumulating elastic force, and the supporting force of the bonding plate at the telescopic end of the elastic support frame 9 on the outside of the mold 3 remains stable. At the same time, the bottom of the pulley shaft is deformed to contact with the bottom of the mold 3. At this time, the punch head 2 drives the pulley shaft to apply a force to the inner wall of the bottom of the mold 3. At the same time, the bonding plate on the telescopic end of the circumferentially distributed elastic support frame 9 applies a supporting force to the outside of the mold 3. The two forces are in opposite directions, so that the external supporting force on the mold 3 offsets part of the force applied by the pulley shaft on the mold 3, thereby avoiding excessive stress in the mold 3 and causing the mold 3 to break.

[0031] The extrusion rod 6 continues to move upward to contact the next trigger plate 202, and the above steps are repeated, so that the pulley shaft is squeezed and deformed by the punch head 2 until it contacts the middle part of the die 3, and the telescopic end of the elastic support frame 9 distributed circumferentially in the middle part applies a supporting force to the outer wall of the die 3. This cycle is repeated until the punch head 2 fits the upper plane of the die 3. At this time, the extrusion rod 6 triggers all the trigger plates 202, and then the punch base 1 drives the punch head 2 to reset upward, completing the forging of the pulley shaft.

[0032] When the punch head 2 moves downward to forge the pulley shaft, the punch head 2 drives the telescopic end of the first elastic push rod 4 to slide downward along its fixed part, and the telescopic end of the first elastic push rod 4 drives the serrated rod 301 thereon to slide synchronously, so that the serrated rod 301 squeezes the limiting shaft 302, and the limiting shaft 302 slides along the connecting piece under the extrusion force, and the first elastic element 303 is stretched at the same time, until the telescopic end of the first elastic push rod 4 drives the serrated rod 301 to slide to the limit position (the punch head 2 is in contact with the upper plane of the mold 3), at this time, the first elastic element 303 is reset, so that the limiting shaft 302 limits the serrated rod 301, and the telescopic end of the first elastic push rod 4 is prevented from resetting automatically. When the punch base 1 drives the punch head 2 to reset upward to the initial state, the electric push rod 304 is turned on, and the telescopic end of the electric push rod 304 pushes the stripping module 305 upward, and the stripping module 305 drives the forged pulley shaft to move upward synchronously, so that the pulley shaft is separated from the mold 3, which is convenient for the staff to take.

[0033] When the telescopic end of the electric push rod 304 is upward, it drives the second extrusion frame 307 to move upward, and the second extrusion frame 307 squeezes the first extrusion frame 306. The first extrusion frame 306 is driven by the extrusion force to separate the limit shaft 302 from the sawtooth rod 301, and at the same time the first elastic element 303 is stretched. At this time, the limit shaft 302 releases the limit on the sawtooth rod 301, so that the telescopic end of the first elastic push rod 4 is reset to the initial state upward, and the hydraulic oil in the fixed part of the second elastic push rod 5 flows back to the fixed part of the first elastic push rod 4. At this time, the telescopic end of the second elastic push rod 5 drives the extrusion rod 6 to reset to the initial state, releasing the extrusion force. The pressure rod 6 squeezes the trigger plates 202, and then the elastic support frames 9 push their fixed parts to reset and drive the rotating ring 8 to reset and rotate. The rotating ring 8 resets and rotates to drive the adjacent rack frame 201 to reset through the arc-shaped gear ring 204, and then drives the trigger plate 202 to reset to the initial state, so that the forged pulley shaft is separated from the mold 3, and at the same time, the supporting force of the telescopic ends of the elastic support frames 9 on the outside of the mold 3 is released. Then the staff takes down the forged pulley shaft, and at the same time the telescopic end of the electric push rod 304 is reset to the initial state. When the pulley shaft needs to be forged again, the above steps are repeated.

[0034] In this embodiment, the rack frame 201 is fixedly connected to the trigger plate 202, and the extrusion rod 6 is fixedly connected to the telescopic end of the second elastic push rod 5, but this is limited to this embodiment. In other subsequent embodiments, the connection relationship between the rack frame 201 and the trigger plate 202 is a sliding connection, and the connection relationship between the extrusion rod 6 and the telescopic end of the second elastic push rod 5 is a sliding connection. Please refer to the specific description in the subsequent embodiments.

[0035] In a further embodiment, Figure 2 , Figure 6 and Figure 7, and also includes: a blocking component, the number of which is the same as that of the rack frame 201, and is arranged on the adjacent rack frame 201. The blocking component is used to trigger the plate 202 to delay pushing the rack frame 201 to slide. The blocking component includes: a second elastic element 401, which is arranged between the rack frame 201 and the trigger plate 202, and the rack frame 201 and the trigger plate 202 are slidably connected, a clamping block 402, which is fixed to the rack frame 201, and the stamping base 1 is rotatably connected to the limiting member 403 through the first connecting member; there are two third elastic elements 404, and the two are symmetrically distributed around the center, and are arranged between the limiting member 403 and the first connecting member, and the limiting member 403 and the clamping block 402 are squeezed and matched.

[0036] In the above scheme, the second elastic element 401 is a tension spring, the elastic force of the second elastic element 401 is greater than the sum of the corresponding elastic support frames 9, the second elastic element 401 is used to drive the relative position between the rack frame 201 and the trigger plate 8 to reset, and the two third elastic elements 404 are torsion springs, and one is a high-torsion torsion spring and the other is a low-torsion torsion spring (with Figure 7 For example, the left side is a high-torsion torsion spring, and the right side is a low-torsion torsion spring). The torsion of the high-torsion third elastic element 404 is greater than the elastic force of the second elastic element 401, which is used to make the second elastic element 401 stretch first and drive the limiter 403 to reset. The low-torsion third elastic element 404 reduces the reset resistance of the rack frame 201 and drives the limiter 403 to reset. The two third elastic elements 404 and the limiter 403 are in a fitted state, that is, when the limiter 403 rotates, only one third elastic element 404 will be twisted and separated from the other. The rack frame 201 is delayed from sliding after the trigger plate 202 through the cooperation of the limiter 403 and the block 402, so that the force of the pulley shaft on the inner wall of the mold 3 and the supporting force on the outside of the mold 3 act synchronously, avoiding the bonding plate at the telescopic end of the elastic support frame 9 to apply a supporting force to the outside of the mold 3 preferentially on the mold 3, resulting in internal stress concentration and damage to the mold 3.

[0037] When the telescopic end of the second elastic push rod 5 drives the extrusion rod 6 thereon to move upward to squeeze a plurality of trigger plates 202, since the limiting member 403 limits the rack frame 201 through the clamping block 402, the trigger plate 202 cannot drive the rack frame 201 to move synchronously. At this time, the extrusion rod 6 pushes the trigger plate 202 to slide along the adjacent rack frame 201, and at the same time, the second elastic element 401 is stretched. When the extrusion rod 6 pushes the trigger plate 202 to the limit state (the pulley shaft is in contact with the inner wall of the mold 3 due to the extrusion force of the punch head 2), the tensile force accumulated by the stretching of the second elastic element 401 is sufficient to overcome the torsion of the high-torque third elastic element 404. The rack frame 201 drives the clamping block 402 thereon to squeeze the limiting member 403, so that the limiting member 403 rotates along the connecting member. At the same time, the high-torque third elastic element 404 is twisted, so that the clamping block 402 bypasses the limiting member 403 and rotates with respect to the connecting member. They separate from each other, and then the third elastic element 404 with high torque drives the limiter 403 to return to its initial state, and the accumulated tension of the second elastic element 401 drives the rack 201 to slide along the connecting piece, so that the rack 201 drives the rotating ring 8 to rotate through the adjacent arc-shaped toothed ring 204, so that the fixed parts of several circumferentially distributed elastic support frames 9 slide along the telescopic end, so that the bonding plate at the telescopic end of the elastic support frame 9 begins to apply a supporting force to the outside of the mold 3, and the rack 201 is delayed by the cooperation of the limiter 403 and the block 402 to trigger the sliding of the plate 202, so that the force applied by the pulley shaft to the inner wall of the mold 3 and the supporting force applied by the bonding plate at the telescopic end of the elastic support frame 9 to the outside of the mold 3 are performed synchronously, so as to avoid the supporting force applied by the bonding plate at the telescopic end of the elastic support frame 9 to the outside of the mold 3 preferentially acting on the mold 3, resulting in internal stress concentration and damage of the mold 3.

[0038] When the forging of the pulley shaft is completed, the telescopic end of the second elastic push rod 5 drives the extrusion rod 6 to reset to the initial state. At this time, several elastic support frames 9 drive the adjacent rotating ring 8 to reset and rotate, so that the rotating ring 8 drives the adjacent rack frame 201 to reset through the arc gear ring 204, and the rack frame 201 drives the trigger plate 202 to reset through the second elastic element 401, and so on until the rack frame 201 drives the block 402 thereon to contact the limit member 403. At this time, the block 402 drives the third elastic element 404 with low torque to twist, so that the block 402 bypasses the limit member 403 and separates from each other, and then the third elastic element 404 with low torque drives the limit member 403 to reset to the initial state. When the pulley shaft needs to be forged again, repeat the above steps.

[0039] In a further embodiment, Figure 2 , Figure 8 and Fig. 9, and also includes: a self-adjusting component, which is arranged on the stamping base 1, and is used to adjust the supporting force of the bonding plate on the telescopic end of the elastic support frame 9 on the outside of the mold 3. The self-adjusting component includes: a sliding rod 501, which is fixed to the extrusion rod 6, and the extrusion rod 6 is slidably connected to the telescopic end of the second elastic push rod 5. A fourth elastic element 502 is arranged between the extrusion rod 6 and the telescopic end of the second elastic push rod 5. An extrusion plate 503 is fixed to the stamping base 1, and the sliding rod 501 is bonded to the extrusion plate 503; the extrusion plate 503 is stepped, and the thickness of the step length gradually increases from short to long, that is, A<B<C, which is used to make the extrusion plate 503 drive the extrusion rod 6 to slide periodically and incrementally through the sliding rod 501.

[0040] In the above solution, the fourth elastic element 502 is a spring and is initially in a compressed state. The fourth elastic element 502 is used to drive the sliding rod 501 to always fit the outside of the extrusion plate 503. Each step of the extrusion plate 503 from left to right (direction as shown in FIG. Fig. 9 The thickness of the mold 3 is gradually increased, that is, when the extrusion rod 6 moves upward, the extrusion rod 6 slides periodically and incrementally in the lateral direction to adapt to the periodic increase of the diameter of the pulley shaft (stepped pulley shaft). When the force applied to the mold 3 by the pulley shaft is gradually reduced, the supporting force of the elastic support frame 9 at the telescopic end of the bonding plate on the mold 3 is simultaneously reduced, so that the stress inside the mold 3 is maintained in a fixed state, reducing the probability of the mold 3 being broken due to the internal stress.

[0041] When the telescopic end of the second elastic push rod 5 drives the extrusion rod 6 thereon to move upward to the limit state, the pulley shaft is gradually fitted with the inner wall of the mold 3 by the force of the punch head 2, that is, the fitting area of ​​the pulley shaft and the mold 3 gradually increases. At this time, the force of the pulley shaft on the inner wall of the mold 3 gradually decreases, and the stress of the inner wall of the mold 3 decreases synchronously. When the extrusion rod 6 moves upward, it drives the sliding rod 501 thereon to move upward synchronously. The sliding rod 501 slides upward along the extrusion plate 503. When the fitting area between the pulley shaft and the mold 3 increases, the extrusion plate 503 slides to the step change position of the extrusion plate 503. That is, at this time, the extrusion rod 6 squeezes the adjacent trigger plate 202 to the limit state, and then the fourth elastic element 502 pulls the extrusion rod 6 to slide along the telescopic end of the second elastic push rod 5, so that the extrusion rod 6 reduces the force on several trigger plates. The extrusion distance of 202 is reduced, thereby reducing the sliding distance of the rack frame 201 driven by the trigger plate 202, and reducing the rotation amplitude of the rotating ring 8 driven by the rack frame 201 through the arc-shaped toothed ring 204, so that the sliding distance of the fixed part of the elastic support frame 9 is reduced, thereby reducing the supporting force of the elastic support frame 9 on the mold 3 by the telescopic end bonding plate. Moreover, since the pulley shaft is a stepped type, the increasing amount of the bonding area between the pulley shaft and the mold 3 each time is in a gradually increasing state, so the sliding distance of the extrusion rod 6 along the extrusion plate 503 is also gradually increased, and this is carried out until the forging of the pulley shaft is completed. The force applied to the mold 3 by the pulley shaft is gradually reduced, and the supporting force of the elastic support frame 9 on the mold 3 by the telescopic end bonding plate is simultaneously reduced, so that the stress inside the mold 3 is maintained in a fixed state, and the probability of the mold 3 being broken due to the internal stress is reduced.

[0042] After the forging of the pulley shaft is completed, the telescopic end of the second elastic push rod 5 drives the extrusion rod 6 to reset downward, and the extrusion rod 6 drives the sliding rod 501 thereon to reset downward to the initial state synchronously, and the fourth elastic element 502 resets to the initial state. When the pulley shaft needs to be forged again, repeat the above steps.

[0043] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A forging device for processing a gearbox pulley shaft, Its characteristics include: Stamping base (1); A punch head (2) is arranged on the punch base (1); a die (3) is detachably fixedly connected to the punch base (1); the punch head (2) is in contact with and fits the die (3); A first elastic push rod (4) is fixedly connected to the punching base (1); the telescopic end of the first elastic push rod (4) is extruded and matched with the punching head (2); the punching base (1) is fixedly connected to a second elastic push rod (5); a fixed portion of the second elastic push rod (5) is fixedly connected to a fixed portion of the first elastic push rod (4) and is connected via a connecting pipe; and a squeezing rod (6) is provided at the telescopic end of the second elastic push rod (5); A plurality of fixed rings (7) are fixedly connected to the stamping base (1); the stamping base (1) is rotatably connected to the same number of rotating rings (8) as the number of the fixed rings (7); and all the fixed rings (7) and all the rotating rings (8) are alternately distributed; A plurality of elastic support frames (9) are slidably connected between the fixed ring (7) and the adjacent rotating ring (8), and a bonding plate that is bonded to the mold (3) is fixedly connected to the telescopic end of the elastic support frame (9); Transmission components, the number of which is the same as that of the fixed rings (7), are arranged on the stamping base (1) and are used to sequentially drive the rotating rings (8) to rotate; A self-locking component is arranged on the stamping base (1) and is used to lock the telescopic end of the first elastic push rod (4).

2. A forging device for processing a gearbox pulley shaft according to claim 1, characterized in that: The inner diameter of the first elastic push rod (4) is greater than the inner diameter of the second elastic push rod (5).

3. A forging device for processing a gearbox pulley shaft according to claim 1, characterized in that: The circumferentially distributed elastic support frames (9) are distributed at equal intervals, and the bonding plates at the telescopic ends of the elastic support frames (9) are arranged tilted, the tilting directions of the bonding plates on all the elastic support frames (9) at the same height are consistent, and the tilting directions of the bonding plates on two adjacent elastic support frames (9) at different heights are opposite.

4. A forging device for processing a gearbox pulley shaft according to claim 1, characterized in that: The transmission assembly comprises: The rack racks (201) are the same in number as the fixing rings (7) and are distributed vertically; the stamping base (1) is fixedly connected to a first connecting piece; and the rack rack (201) is slidably connected to the first connecting piece of the stamping base (1); A trigger plate (202) is arranged on the rack frame (201), and the trigger plate (202) is extruded and matched with the extrusion rod (6); The arc-shaped toothed ring (203) is fixedly connected to the rotating ring (8), and the arc-shaped toothed ring (203) is meshed with the adjacent rack frame (201).

5. A forging device for processing a gearbox pulley shaft according to claim 4, characterized in that: The self-locking component comprises: A sawtooth rod (301) fixedly connected to the telescopic end of the first elastic push rod (4); A limiting shaft (302), the stamping base (1) is fixedly connected to a second connecting piece, the limiting shaft (302) is slidably connected to the second connecting piece of the stamping base (1), the sawtooth rod (301) and the limiting shaft (302) are limitedly matched, and a first elastic element (303) is provided between the limiting shaft (302) and the second connecting piece; A shedding assembly is arranged on the stamping base (1) and is used to separate the pulley shaft from the mould (3).

6. A forging device for processing a gearbox pulley shaft according to claim 5, characterized in that: The shedding assembly comprises: An electric push rod (304) is fixedly connected to the stamping base (1); The stripping module (305) is sealingly and slidably connected to the interior of the mold (3), and the stripping module (305) is in contact with and fits with the telescopic end of the electric push rod (304).

7. A forging device for processing a gearbox pulley shaft according to claim 6, characterized in that: The limiting shaft (302) is fixedly connected to a first extrusion frame (306), the telescopic end of the electric push rod (304) is fixedly connected to a second extrusion frame (307), and the first extrusion frame (306) and the second extrusion frame (307) are extrusion-matched.

8. A forging device for processing a gearbox pulley shaft according to claim 6, characterized in that: Also included are: The blocking components, the number of which is the same as that of the rack racks (201), are arranged on adjacent rack racks (201), the blocking components are used for the trigger plate (202) to delay pushing the rack rack (201) to slide, and the blocking components include: A second elastic element (401) is arranged between the rack frame (201) and the trigger plate (202), and the rack frame (201) and the trigger plate (202) are slidably connected; The clamping block (402) is fixedly connected to the rack frame (201), and the stamping base (1) is rotatably connected to the limiting member (403) via a first connecting member; The third elastic element (404) has two parts which are centrally symmetrically distributed and are arranged between the limiting member (403) and the first connecting member. The limiting member (403) is pressed and matched with the clamping block (402).

9. A forging device for processing a gearbox pulley shaft according to claim 8, characterized in that: Also included are: A self-adjusting component is arranged on the stamping base (1) and is used to adjust the supporting force of the laminating plate on the telescopic end of the elastic support frame (9) on the outside of the mold (3). The self-adjusting component comprises: A sliding rod (501) is fixedly connected to the extrusion rod (6), and the extrusion rod (6) is slidably connected to the telescopic end of the second elastic push rod (5); The fourth elastic element (502) is arranged between the extrusion rod (6) and the telescopic end of the second elastic push rod (5); an extrusion plate (503) is fixedly connected to the stamping base (1); and the sliding rod (501) is in contact with the extrusion plate (503).

10. A forging device for processing a gearbox pulley shaft according to claim 9, characterized in that: The extruded plate (503) is in a stepped shape, and the thickness gradually increases from short to long step lengths, that is, A<B<C.

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