A hubless spinning apparatus

Abstract

The utility model discloses a kind of hub dieless spinning equipment, comprising: cabin, hub spinning clamp and spinning device;Hub spinning clamp is located in cabin, spinning device is located in hub spinning clamp periphery side and / or above, for spinning to hub;Hub spinning clamp includes chuck disc body, driving assembly and clamping assembly;Driving assembly includes connecting shaft, centering drive seat, driving spring and pull-press plate, centering drive seat is located at disc cover axis, the bottom of centering drive seat extends into mounting groove and is drivenly connected with connecting shaft, driving spring is located between centering drive seat and connecting shaft, pull-press plate is located in mounting groove, pull-press plate is drivenly connected with connecting shaft;Clamping assembly includes centering clamp jaw mechanism and pressing clamp jaw mechanism, centering clamp jaw mechanism is drivenly connected with centering drive seat, pressing clamp jaw mechanism includes positioning sleeve, press jaw pull rod, limit screw and pressing clamp finger;The present scheme has the characteristics of high centering accuracy, and can realize automatic processing.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub spinning equipment, and in particular to a wheel hub dieless spinning equipment. Background Technology

[0002] A wheel hub spinning machine is a device that uses spinning to complete the casting and forming of wheel hubs. In the wheel hub processing, a fixture is generally used to clamp and position the blank wheel hub first, and then a spinning wheel is used to spin and shape the blank wheel hub. Currently, the fixtures used to clamp and position the wheel hub generally use multiple sets of hydraulic cylinders to drive the clamping fingers one by one to internally or externally clamp the wheel hub. In use, it has been found that this method will cause errors in the centering of the wheel hub, thus affecting the processing accuracy and failing to meet the factory requirements. Therefore, there is an urgent need to provide a moldless spinning machine for wheel hubs with high centering accuracy and easy automation. Summary of the Invention

[0003] Therefore, there is a need for a wheel hub dieless spinning device that can simultaneously drive several centering fixtures and synchronously drive several clamping fixtures.

[0004] To achieve the above objectives, the inventors provide a wheel hub spinning apparatus without a mold, comprising: a machine compartment, a wheel hub spinning fixture, and a spinning device; The hub spinning fixture is located inside the engine compartment, and the spinning device is located around and / or above the hub spinning fixture for spinning the hub. The wheel hub spinning fixture includes a chuck body, a drive assembly, and a clamping assembly; The chuck body includes a chuck base and a chuck cover. The chuck base is provided with a mounting groove, and a first through hole is opened at the axial center of the bottom of the mounting groove. The chuck cover is placed on the top of the chuck base. The drive assembly includes a connecting shaft, a centering drive seat, a drive spring, and a tension plate. The connecting shaft extends through a first through hole into a mounting groove. The centering drive seat is located at the center of the disc cover shaft, and its bottom extends into the mounting groove to drive the connecting shaft. The drive spring is located between the centering drive seat and the connecting shaft. The tension plate is located in the mounting groove and is drive-connected to the connecting shaft. The clamping assembly includes a centering jaw mechanism and a clamping jaw mechanism. The centering jaw mechanism is evenly distributed on the upper surface of the disc cover and is driven and connected to the centering drive seat. The clamping jaw mechanism includes a positioning sleeve, a clamping jaw rod, a limiting screw, and a clamping finger. The positioning sleeve is evenly distributed on the disc cover and extends through the disc cover into the mounting groove. The clamping jaw rods are respectively sleeved in the positioning sleeves. A limiting screw is provided on the side wall of the positioning sleeve located in the mounting groove. A spiral groove is opened on the clamping jaw rod corresponding to the limiting screw. The limiting screw is slidably connected to the spiral groove. The clamping jaw rod is driven and connected to the pull plate for up and down movement.

[0005] As a preferred structure of this utility model, a central positioning disk penetrating the disk cover is provided at the center of the disk cover axis. A second through hole is opened at the center of the central positioning disk axis. A first groove is provided on the upper surface of the central positioning disk coaxial with the second through hole, and a second groove is provided on the lower surface. The centering drive seat is slidably disposed in the first groove. A centering drive rod provided at the bottom end of the centering drive seat extends through the second through hole into the second groove. A spring sleeve is slidably sleeved in the second groove. The opening of the spring sleeve is upward. The drive spring is sleeved on the centering drive rod in the second groove, and its bottom end abuts against the spring sleeve.

[0006] As a preferred structure of this utility model, the centering gripper mechanism includes a centering slide, a centering slide rail, and centering grippers. The centering slide and the centering slide rail are evenly distributed on the upper surface of the disk cover with the centering drive seat axis as the center. The centering slide is fixedly mounted on the disk cover, the centering slide rail is slidably mounted on the centering slide, and the centering grippers are respectively mounted on the centering slide rail. A T-shaped slider is provided at one end of the positioning slide rail near the centering drive seat. The outer wall of the centering drive seat has T-shaped inclined grooves that are slidably connected to the T-shaped sliders in the same number. The T-shaped inclined grooves on the outer wall of the centering drive seat are arranged to gradually converge from bottom to top along the outer wall of the centering drive seat.

[0007] As a preferred structure of this utility model, the upper surface of the disc cover located below the centering slide is provided with a third groove, a counterweight block is provided in the third groove, a first slot is provided on the counterweight block, a second slot is provided on the lower surface of the positioning slider, and a counterweight lever is provided between the first slot and the second slot. One end of the counterweight lever is inserted into the first slot and the other end is inserted into the second slot. The counterweight lever is rotatably connected to the disc cover or the positioning slide.

[0008] As a preferred structure of this utility model, the distance from the end of the counterweight lever that is inserted into the first slot to the rotation axis is greater than the distance from the end of the counterweight lever that is inserted into the second slot to the rotation axis.

[0009] As a preferred structure of this utility model, the spiral groove includes a vertical section, a spiral section and a limiting section arranged from top to bottom along the pressure claw pull rod. The angle between the starting end and the ending end of the spiral section and the axis of the pressure claw pull rod is H, where 90°≤H≤270°.

[0010] As a preferred structure of this utility model, the length of the vertical section of the spiral groove is greater than the length of the limiting section.

[0011] As a preferred structure of this utility model, the clamping claw mechanism further includes a disc spring. A disc spring upper cover and a disc spring lower cover are sleeved on the claw pull rod located below the pressure plate. The disc spring is located inside the disc spring upper cover and the disc spring lower cover. A nut is provided at the bottom end of the claw pull rod located below the disc spring lower cover.

[0012] As a preferred structure of this utility model, the pressure claw rod located above the pressure plate and below the spiral groove is provided with a step.

[0013] As a preferred structure of this utility model, the spinning device includes a support wheel and a spinning wheel, and the engine compartment is provided with a moving mechanism that drives the support wheel and the spinning wheel to move horizontally and vertically.

[0014] Unlike existing technologies, the above technical solution achieves the following beneficial effects: This equipment centers and clamps wheel hubs using a hub spinning fixture installed inside the engine compartment, and then spins the centered and spun wheel hubs using a spinning device. The hub spinning fixture's chuck body is equipped with a drive assembly and a clamping assembly, which effectively achieves precise centering and clamping of the wheel hub. Specifically: a connecting shaft simultaneously drives the centering drive seat and the pressure plate. During the movement of the centering drive seat, the centering gripper mechanism connected to it moves synchronously, causing the gripper mechanism to clamp and release simultaneously, achieving precise centering. During the movement of the pressure plate, the clamping gripper mechanism connected to it moves synchronously; that is, the pressure plate drives the clamping gripper rod, causing the clamping gripper rod to rotate synchronously, achieving synchronous clamping or releasing of the wheel hub. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the wheel hub moldless spinning equipment described in a specific embodiment. Figure 2 This is a schematic diagram of the moving mechanism structure described in a specific embodiment; Figure 3 A perspective view of the wheel hub spinning fixture described in the specific embodiment; Figure 4 A cross-sectional view of the wheel hub spinning fixture described in the specific embodiment. Figure 1 ; Figure 5 A cross-sectional view of the wheel hub spinning fixture described in the specific embodiment. Figure 2 ; Figure 6 This is a schematic diagram of the drive spring structure described in a specific embodiment; Figure 7 This is a schematic diagram of the tension and compression plate structure described in a specific embodiment; Figure 8 This is a schematic diagram of the structure of the first and second inspection ports in a specific implementation method; Figure 9 This is a schematic diagram of the centering drive seat structure described in the specific embodiment; Figure 10 This is a schematic diagram of the centering gripper mechanism described in a specific embodiment; Figure 11An exploded view of the centering gripper mechanism described in the specific embodiment; Figure 12 This is a schematic diagram of the clamping jaw mechanism described in a specific embodiment; Figure 13 An exploded view of the clamping gripper mechanism described in the specific embodiment; Figure 14 This is a schematic diagram of the spiral groove structure described in a specific embodiment.

[0016] Explanation of reference numerals in the attached figures: 1. Hub spinning fixture; 101. Chuck body; 102. Chuck base; 103. Mounting slot; 104. First through hole; 105. Chuck cover; 106. Center positioning plate; 107. Second through hole; 108. First groove; 109. Second groove; 110. T-slot; 111. Third groove; 112. Counterweight; 113. First slot; 114. Counterweight lever; 115. First inspection port; 116. Second inspection port; 117. Guide post; 118. Screw sleeve; 119. Fastening screw; 201. Connecting shaft; 202. Centering drive seat; 203. Drive spring; 204. Tension plate; 205. Guide hole; 206. Spring sleeve; 207. Centering drive rod; 301. Centering slide block; 302. Centering slide rail; 303. Centering gripper finger; 304. T-shaped slide head; 305. Second slot; 401. Positioning sleeve; 402. Claw pull rod; 403. Step; 404. Spiral groove; 405. Vertical section; 406. Spiral section; 407. Limiting section; 408. Limiting screw; 409. Clamping gripper finger; 410. Disc spring; 411. Disc spring upper cover; 412. Disc spring lower cover; 413. Nut; 501. Cabin; 502. Support wheel; 503. Spinning wheel; 504. Moving mechanism; 505. Hub; 506. Servo motor. Detailed Implementation

[0017] To explain in detail the technical content, structural features, objectives, and effects of the technical solution, the following description is provided in conjunction with specific embodiments and accompanying drawings.

[0018] like Figures 1 to 14 As shown, this embodiment provides a wheel hub moldless spinning equipment, including: engine compartment 501, wheel hub spinning fixture and spinning device; The wheel hub spinning fixture is located inside the engine compartment, and the spinning device is located around and / or above the wheel hub spinning fixture for spinning the wheel hub. The wheel hub spinning fixture 1 includes a chuck body 101, a drive assembly, and a clamping assembly; The chuck body 101 includes a chuck base 102 and a chuck cover 105. The chuck base 102 is provided with a mounting groove 103. A first through hole 104 is opened at the axis at the bottom of the mounting groove 103. The chuck cover 105 is placed on the top of the chuck base 102. The drive assembly includes a connecting shaft 201, a centering drive seat 202, a drive spring 203, and a tension plate 204. The connecting shaft 201 extends through the first through hole 104 into the mounting groove 103. The centering drive seat 202 is located at the center of the disc cover 105. The bottom of the centering drive seat 202 extends into the mounting groove 103 and is driven to connect with the connecting shaft 201. The drive spring 203 is located between the centering drive seat 202 and the connecting shaft 201. The tension plate 204 is located in the mounting groove 103 and is driven to connect with the connecting shaft 201. The clamping assembly includes a centering jaw mechanism and a clamping jaw mechanism. The centering jaw mechanism is evenly distributed on the upper surface of the disc cover 105 and is drivenly connected to the centering drive seat 202. The clamping jaw mechanism includes a positioning sleeve 401, a clamping jaw rod 402, a limiting screw 408, and a clamping finger 409. The positioning sleeve 401 is evenly distributed on the disc cover 105 and extends through the disc cover 105 into the mounting groove 103. The clamping jaw rods 402 are respectively sleeved in the positioning sleeves 401. The positioning sleeve 401 located in the mounting groove 103 has a limiting screw 408 on its side wall. The clamping jaw rod 402 corresponding to the limiting screw 408 has a spiral groove 404. The limiting screw 408 is slidably connected to the spiral groove 404. The clamping jaw rod 402 is driven vertically to the tension plate 204.

[0019] In the specific implementation of this embodiment, such as Figure 4 and Figure 5 As shown, the upper surface of the chuck base 102 is provided with a mounting groove 103, and a first through hole 104 is provided at the bottom axis of the mounting groove 103. The chuck cover 105 is a sealing cover located on the top of the chuck base 102 and can be fastened by a sealing ring and screws. In this embodiment, screw sleeves 118 can be provided around the axis near the chuck cover 105, and fastening screws 119 can be provided in the screw sleeves 118 to fasten and seal the chuck cover 105 and the chuck base 102 near the axis, making the entire chuck body 101 more secure and reducing resonance between components. In this embodiment, the drive assembly adopts a connecting shaft 201. The bottom end of the connecting shaft 201 is used to connect an external drive mechanism, such as a hydraulic cylinder. The other end of the connecting shaft 201 is driven to connect to the tension plate 204 and the centering drive seat 202 in the mounting groove 103. In this embodiment, the top end of the connecting shaft 201 is fixedly connected to the tension plate 204. A drive spring 203 is provided between the connecting shaft 201 and the centering drive seat 202. The drive spring 203 can provide buffering to prevent the centering gripper mechanism from making hard contact with the wheel hub surface during operation, which would cause scratches and damage.

[0020] like Figure 4 and Figure 5As shown, in order to facilitate the installation of the drive spring 203 and control the stroke of the drive spring 203, in some embodiments, a central positioning disk 106 is provided at the axis of the disk cover 105, and a second through hole 107 is provided at the axis of the central positioning disk 106. A first groove 108 is provided on the upper surface of the central positioning disk 106, which is coaxial with the second through hole 107, and a second groove 109 is provided on the lower surface. The centering drive seat 202 is slidably disposed in the first groove 108. The centering drive rod 207 provided at the bottom end of the centering drive seat 202 extends through the second through hole 107 into the second groove 109. A spring sleeve 206 is slidably sleeved in the second groove 109. The spring sleeve 206 opens upward. The drive spring 203 is sleeved on the centering drive rod 207 in the second groove 109, and its bottom end abuts against the spring sleeve 206. In this embodiment, the central positioning disk 106 is fixed and sealed between the disk cover 105 and the central positioning disk 106 and the centering drive seat 202 disposed in the first groove 108 are sealed and slidably disposed together. That is, during the operation, the upper part of the centering drive seat 202 slides up and down in the first groove 108. The centering drive rod 207 disposed at the bottom of the centering drive seat 202 passes through the second through hole 107 and extends into the second groove 109. The drive spring 203 is sleeved on the centering drive rod 207, and the bottom of the drive spring 203 is provided with a spring sleeve 206. The spring sleeve 206 slides up and down in the second groove 109 and is fixedly connected to the bottom end of the centering drive rod 207. That is, during the up and down movement of the centering drive seat 202, the spring sleeve 206 is driven to slide in the second groove 109 by the drive spring 203.

[0021] like Figure 4 , Figure 5 and Figures 12 to 14 As shown, the pull plate 204 of the drive assembly has a number of third through holes on its periphery equal to the number of pressure claw pull rods 402. That is, when the pull plate 204 is driven by the connecting shaft 201, it drives the pressure claw pull rods 402 to move up and down and rotate, thereby realizing that the clamping fingers 409 at the top of the pressure claw pull rods 402 can be opened and closed by rotating up and down. Specifically, by setting a limiting screw 408 on the positioning sleeve 401 of the clamping claw mechanism and setting a spiral groove 404 on the pressure claw pull rods 402, the limiting screw 408 does not move during the up and down movement of the pressure claw pull rods 402 and is restricted within the spiral groove 404, moving along the spiral groove 404, thereby driving the pressure claw pull rods 402 to rotate during the up and down movement.

[0022] like Figure 14As shown, in different embodiments, the spiral groove 404 includes a vertical section 405, a spiral section 406, and a limiting section 407 arranged from top to bottom along the pressure claw rod 402. The angle between the starting and ending ends of the spiral section 406 and the axis of the pressure claw rod 402 is H, where 90°≤H≤270°. That is, the pressure claw rod 402 can rotate 90° to 270° during the rotational opening process. In this embodiment, the included angle H is 90°. In addition, the length of the vertical section 405 of the spiral groove 404 is greater than the length of the limiting section 407. This allows for centering before clamping during the clamping process and releasing the clamping before centering during the release process. This avoids clamping before centering is in place, which could cause the hub center to be off-center from the axis of the disc cover 105, thus affecting the machining accuracy.

[0023] In the above embodiment, before the drive connecting shaft 201 descends, the tension plate 204 and the centering drive seat 202 are both in a high position, and the centering gripper mechanism and the clamping gripper mechanism have not started working. That is, the centering gripper mechanism and the clamping gripper mechanism are both in a non-clamping and non-clamping state. At this time, the wheel hub can be placed on the upper surface of the disc cover 105 by the robotic arm. Then, the connecting shaft 201 can be driven to descend by the external hydraulic cylinder. During the descent, the drive spring 203 drives the spring 203 sliding sleeve to descend, thereby driving the centering drive seat 202 to descend. The centering drive seat 202 simultaneously drives several centering gripper mechanisms on the disc cover 105 to gradually move closer to the centering drive seat 202, thereby driving the centering gripper mechanisms to center the wheel hub. During the descent of the connecting shaft 201, it also drives the pressure plate 204 to descend. During the descent of the pressure plate 204, it drives the pressure claw rod 402 to descend. Under the action of the limit screw 408 and the spiral groove 404, the clamping finger 409 set at the top of the pressure claw rod 402 gradually rotates toward the wheel hub and descends until the clamping finger 409 completes the clamping of the wheel hub. Then the connecting shaft 201 stops descending, and the wheel hub can be spun. After the wheel hub is spun, the wheel hub release operation can be performed. Specifically: the connecting shaft 201 rises under the drive of the external hydraulic cylinder, the pressure plate 204 rises under the drive of the connecting shaft 201, and drives the pressure claw rod 402 to rise. Under the restriction of the limit screw 408 and the spiral groove 404, the pressure claw rod 402 gradually rises and turns the clamping finger 409 to the outside, thus clamping and releasing the wheel hub. When the top end of the connecting shaft 201 contacts the spring sleeve 206, the drive spring 203 slides upward in the second groove 109, compressing the drive spring 203. At this time, the centering drive seat 202 is driven to rise. During the rising process, several centering claw mechanisms on the drive disc cover 105 move away from the centering drive seat 202, thereby realizing the centering and release of the wheel hub. After the wheel hub release operation is completed, the connecting shaft 201 can be stopped from rising further, so that the wheel hub can be replaced. In the above embodiments, the spinning device includes a support wheel and a spinning wheel. The engine compartment is provided with a moving mechanism that drives the support wheel and the spinning wheel to move horizontally and vertically. In this embodiment, the support wheel 502 and the spinning wheel 503 are respectively provided in two sets, namely coarse spinning and fine spinning.

[0024] like Figure 1 and Figure 2 As shown, the moving mechanism 504 uses a hydraulic cylinder to drive the spinning device, adjusting its horizontal and vertical positions as needed during operation. During operation, a servo motor 506 is externally connected to the bottom of the chuck base. The servo motor drives the chuck body to rotate, and then the moving mechanism drives the support wheel and spinning wheel to move to the spinning position, realizing the spinning of the hub 505, with the spinning process progressing from coarse to fine.

[0025] like Figure 4 , Figure 5and Figures 9 to 11 As shown, in some embodiments, the centering gripper mechanism includes a centering slide 301, a centering slide rail 302, and centering grippers 303. The centering slide 301 and the centering slide rail 302 are evenly distributed on the upper surface of the disk cover 105 with the centering drive seat 202 as the center. The centering slide 301 is fixedly mounted on the disk cover 105, and the centering slide rail 302 is slidably mounted on the centering slide 301. The centering grippers 303 are respectively mounted on the centering slide rail 302. A T-shaped slider 304 is provided at one end of the positioning slide rail near the centering drive seat 202. The centering drive seat 202... The outer wall of 02 is provided with a number of T-shaped inclined grooves 110 that are slidably connected to the T-shaped sliders 304. The T-shaped inclined grooves 110 on the outer wall of the centering drive seat 202 are gradually arranged from bottom to top along the outer wall of the centering drive seat 202. In this embodiment, the T-shaped inclined grooves 110 are inclined, so that during the movement of the centering drive seat 202, the centering slide rail 302 can be driven to move inward or outward on the centering slide seat 301 through the T-shaped inclined grooves 110 and the T-shaped sliders 304, so as to achieve inward clamping and outward release.

[0026] like Figure 4 , Figure 5 and Figures 9 to 11 As shown, during the spinning process, the chuck body 101 rotates at high speed, generating centrifugal force on the centering jaw mechanism and hub on the chuck cover 105. To overcome this centrifugal force, in this embodiment, a third groove 111 is provided on the upper surface of the chuck cover 105 below the centering slide 301. A counterweight 112 is provided in the third groove 111, and a first slot 113 is provided on the counterweight 112. A second slot 305 is provided on the lower surface of the positioning slider. A counterweight lever 114 is provided between the first slot 113 and the second slot 305. One end of the counterweight lever 114 is inserted into the first slot 113, and the other end is inserted into the second slot 305. The counterweight lever 114 is rotatably connected to the chuck cover 105 or the positioning slide. That is, by setting the counterweight lever 114, the centrifugal force is transferred to the counterweight 112, and the counterweight 112 balances the centrifugal force, thereby effectively ensuring safety and processing effect during the spinning process. In this embodiment, the distance from the end of the counterweight lever 114 that is inserted into the first slot 113 to the rotation axis is greater than the distance from the end of the counterweight lever 114 that is inserted into the second slot 305 to the rotation axis. This allows the effect of balancing a large centrifugal force to be achieved by setting a small counterweight block 112.

[0027] like Figure 4 , Figure 5 and Figures 6 to 8As shown, in some embodiments, the clamping jaw mechanism further includes a disc spring. A disc spring upper cover 411 and a disc spring lower cover 412 are fitted onto the jaw pull rod 402 located below the pressure plate 204. The disc spring is disposed within the disc spring upper cover 411 and disc spring lower cover 412. A nut 413 is provided at the bottom end of the jaw pull rod 402 located below the disc spring lower cover 412. In this embodiment, the disc spring provides cushioning for the jaw pull rod 402, preventing hard contact. Furthermore, a step 403 is provided on the jaw pull rod 402 located above the pressure plate 204 and below the spiral groove 404, facilitating the pressure plate 204 to drive the jaw pull rod 402 upwards.

[0028] like Figure 8 As shown, in some embodiments, a sealed first inspection port 115 is provided on the outer wall of the disc base 102 located on one side of the limiting screw 408, and / or a sealed second inspection port 116 is provided at the bottom of the disc base 102 located below the pressure claw pull rod 402; both the first inspection port 115 and the second inspection port 116 are sealed. The first inspection port 115 facilitates the disassembly and replacement of the limiting screw 408, and the second inspection port 116 facilitates the disassembly of the nut 413 at the bottom of the pressure claw pull rod 402, facilitating the replacement of the vulnerable parts drive spring 203 and spring sleeve 206. In some embodiments, the tension plate 204 has several guide holes 205, and several guide posts 117 are vertically arranged between the disc cover 105 and the bottom of the disc base 102. The guide posts 117 are adapted to the guide holes 205 to guide the movement of the tension plate 204 in the mounting groove 103.

[0029] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of patent protection for this utility model.

Claims

1. A wheel hub dieless spinning device, characterized in that, include: Spinning fixtures and spinning devices for engine compartments and wheel hubs; The hub spinning fixture is located inside the engine compartment, and the spinning device is located around and / or above the hub spinning fixture for spinning the hub. The wheel hub spinning fixture includes a chuck body, a drive assembly, and a clamping assembly; The chuck body includes a chuck base and a chuck cover. The chuck base is provided with a mounting groove, and a first through hole is opened at the axial center of the bottom of the mounting groove. The chuck cover is placed on the top of the chuck base. The drive assembly includes a connecting shaft, a centering drive seat, a drive spring, and a tension plate. The connecting shaft extends through a first through hole into a mounting groove. The centering drive seat is located at the center of the disc cover shaft, and its bottom extends into the mounting groove to drive the connecting shaft. The drive spring is located between the centering drive seat and the connecting shaft. The tension plate is located in the mounting groove and is drive-connected to the connecting shaft. The clamping assembly includes a centering jaw mechanism and a clamping jaw mechanism. The centering jaw mechanism is evenly distributed on the upper surface of the disc cover and is driven and connected to the centering drive seat. The clamping jaw mechanism includes a positioning sleeve, a clamping jaw rod, a limiting screw, and a clamping finger. The positioning sleeve is evenly distributed on the disc cover and extends through the disc cover into the mounting groove. The clamping jaw rods are respectively sleeved in the positioning sleeves. A limiting screw is provided on the side wall of the positioning sleeve located in the mounting groove. A spiral groove is opened on the clamping jaw rod corresponding to the limiting screw. The limiting screw is slidably connected to the spiral groove. The clamping jaw rod is driven and connected to the pull plate for up and down movement.

2. The hub flow forming apparatus of claim 1, wherein: A central positioning plate is provided at the center of the disc cover. A second through hole is opened at the center of the central positioning plate. A first groove is provided on the upper surface of the central positioning plate, which is coaxial with the second through hole, and a second groove is provided on the lower surface. The centering drive seat is slidably disposed in the first groove. A centering drive rod provided at the bottom end of the centering drive seat extends through the second through hole into the second groove. A spring sleeve is slidably sleeved in the second groove. The opening of the spring sleeve is upward. The drive spring is sleeved on the centering drive rod in the second groove, and its bottom end abuts against the spring sleeve.

3. The hub flow forming apparatus of claim 1, wherein: The centering gripper mechanism includes a centering slide, a centering slide rail, and centering grippers. The centering slide and the centering slide rail are evenly distributed on the upper surface of the disk cover with the centering drive seat axis as the center. The centering slide is fixed on the disk cover, the centering slide rail is slidably mounted on the centering slide, and the centering grippers are respectively mounted on the centering slide rail. The end of the positioning slide rail near the centering drive seat is provided with a T-shaped slider. The outer wall of the centering drive seat is provided with T-shaped inclined grooves that are slidably connected to the T-shaped sliders in the same number. The T-shaped inclined grooves on the outer wall of the centering drive seat are arranged to gradually converge from bottom to top along the outer wall of the centering drive seat.

4. The hub flow forming apparatus of claim 1, wherein: The upper surface of the disc cover located below the centering slide is provided with a third groove, and a counterweight is provided in the third groove. The counterweight is provided with a first slot, and the lower surface of the positioning slider is provided with a second slot. A counterweight lever is provided between the first slot and the second slot. One end of the counterweight lever is inserted into the first slot, and the other end is inserted into the second slot. The counterweight lever is rotatably connected to the disc cover or the positioning slide.

5. The hub flow forming apparatus of claim 4, wherein: The distance from the end of the counterweight lever that is inserted into the first slot to the rotation axis is greater than the distance from the end of the counterweight lever that is inserted into the second slot to the rotation axis.

6. The hub flow forming apparatus of claim 1, wherein: The spiral groove includes a vertical section, a spiral section, and a limiting section arranged from top to bottom along the pressure claw pull rod. The angle between the starting end and the ending end of the spiral section and the axis of the pressure claw pull rod is H, where 90°≤H≤270°.

7. The hub flow forming apparatus of claim 6, wherein: The vertical section of the spiral groove is longer than the limiting section.

8. The hub flow forming apparatus according to any one of claims 1 to 7, characterized by: The clamping jaw mechanism also includes a disc spring. A disc spring upper cover and a disc spring lower cover are sleeved on the jaw pull rod located below the pressure plate. The disc spring is located inside the disc spring upper cover and the disc spring lower cover. A nut is provided at the bottom end of the jaw pull rod located below the disc spring lower cover.

9. The hub flow forming apparatus according to any one of claims 1 to 7, characterized by: Steps are provided on the claw rod located above the tension plate and below the spiral groove.

10. The hub flow forming apparatus according to any one of claims 1 to 7, characterized by: The spinning device includes a support wheel and a spinning wheel, and the cabin is equipped with a moving mechanism that drives the support wheel and the spinning wheel to move horizontally and vertically.

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