Hub spinning forming device and method

Abstract

The invention provides a hub spinning forming device and method, and belongs to the technical field of hub producing and machining.The device comprises a hub blank and further comprises a main transmission shaft part and a working cavity, the main transmission shaft part extends into the working cavity, and the hub blank is limited by the main transmission shaft part; a first telescopic part and a second telescopic part are arranged at the top of the working cavity, a sealing door is arranged on the front face of the working cavity, a spinning driving part is arranged at the top of a first push rod moving seat of the first telescopic part, and a shaping driving part is arranged at the top of a second push rod moving seat of the second telescopic part. A spinning shaft assembly is connected to the lower portion of the spinning driving part through a coupler, and a shaping shaft assembly is connected to the lower portion of the shaping driving part through a coupler. Through collaborative operation design of the spinning wheel and the shaping wheel and an accurate feeding control system, organic unification of high-precision forming and high-efficiency production is achieved, meanwhile, the service life of a tool is effectively prolonged, and the production cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of hub production and processing, and particularly relates to a hub spinning forming device and method. Background Art

[0002] Spinning forming is an efficient and material-saving metal plastic processing technology, which is particularly suitable for the processing of axisymmetric rotary parts such as hubs. During the spinning process, the spinning wheel applies a local deformation force to the rotating workpiece, feeds along the rotation axis according to a predetermined trajectory, enables the metal material to flow in a specific direction, and gradually forms the required shape. As an important component of an automobile, the manufacturing quality of the hub directly affects driving safety and comfort. At present, the hub spinning forming process usually adopts a single spinning wheel design, and adjusts the processing accuracy and efficiency by controlling process parameters such as the spindle speed and the spinning wheel speed.

[0003] After searching the patent literature CN118832027A discloses a wheel hub spinning forming device, belonging to the field of hub production, including a housing, two groups of movable doors respectively rotatably connected to both sides of the housing, a spinning unit connected inside the housing, a hydraulic component and a rotating unit connected inside the housing. The spinning unit includes two movable seats slidably connected inside the housing and a first movable groove opened inside the movable seat; by grinding the outer surface of the spinning wheel, the smoothness of its surface can be effectively restored and the surface roughness can be reduced, thereby improving the processing accuracy and quality, avoiding internal stress concentration in the material caused by uneven pressure and leaving scratches and indentations on the blank, thereby reducing possible internal defects and surface unevenness during the hub forming process, and can also effectively remove early wear and cracks, preventing these small defects from rapidly expanding into larger damages during use, thereby prolonging the overall life of the spinning wheel.

[0004] Although the above patent literature can prolong the overall life of the spinning wheel, the feed rate of the spinning wheel is not considered in the prior art, resulting in difficulty in balancing deformation uniformity, surface quality and production efficiency. At the same time, the single spinning wheel design cannot cope with the material springback problem, and the spinning wheel bears high spinning pressure and severe friction and wear when processing high-strength hub materials, with a short tool life and frequent replacement, directly increasing the equipment maintenance cost and downtime; in addition, when processing complex hub contours, stress concentration and cracks are likely to occur at key parts such as the rim corners and the spoke joints; additional finishing processes are required after traditional spinning forming to achieve the required surface roughness, which not only increases the processes, but also introduces new dimensional error risks, seriously restricting the quality stability, production efficiency and automation level of the hub manufacturing industry. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a hub spinning forming device and method, which effectively solve the problems existing in the prior art. The feed amount of the spinning wheel is not considered, resulting in difficulty in balancing deformation uniformity, surface quality and production efficiency. At the same time, the single spinning wheel design cannot cope with the material springback problem, and the spinning wheel bears high spinning pressure and severe friction and wear when processing high-strength hub materials, with short tool life and frequent replacement, directly increasing the equipment maintenance cost and downtime. In addition, when processing complex hub contours, stress concentration and cracks are prone to occur at key parts such as the rim corners and the connections of the spokes. After traditional spinning forming, additional finishing processes are required to meet the required surface roughness, which not only increases the processes, but also introduces new dimensional error risks, seriously restricting the quality stability, production efficiency and automation degree of the hub manufacturing industry.

[0006] To achieve the above object, the present invention provides the following technical solution: A hub spinning forming device includes a hub blank, and also includes a main drive shaft part and a working chamber. The main drive shaft part extends into the interior of the working chamber, and the hub blank is limited by the main drive shaft part. A first telescopic part and a second telescopic part are provided at the top of the working chamber, a sealing door is provided on the front of the working chamber, a spinning drive part is provided at the top of the first push rod moving seat of the first telescopic part, and a shaping drive part is provided at the top of the second push rod moving seat of the second telescopic part. The spinning drive part is connected to a spinning shaft assembly through a coupling below, and the shaping drive part is connected to a shaping shaft assembly through a coupling below.

[0007] As a further improvement of the present invention, the main drive shaft part includes a main drive shaft and a first bearing seat. A main shaft shoulder is provided on the main drive shaft, and the hub blank is clamped on the main shaft shoulder. A pressing block and a pressing bolt are provided on the top of the hub blank.

[0008] As a further improvement of the present invention, the main drive shaft is also provided with a number of limiting grooves, and positioning threaded holes are opened on the limiting grooves. The pressing bolt passes through the through hole of the pressing block and the positioning threaded hole and is locked to realize the clamping of the main drive shaft part and the hub blank.

[0009] As a further improvement of the present invention, a first groove is opened on the front of the working chamber, and the sealing door is rotatably connected to the working chamber through the first groove. A number of slide rails and second grooves are provided on the top of the working chamber, and the second grooves are located in the middle of adjacent second grooves.

[0010] As a further improvement of the present invention, the first telescopic part further includes a support seat and a first electric push rod connected thereto. The support seat is located at the top of the working chamber. The other end of the first electric push rod is connected to a push rod connecting plate, and the push rod connecting plate is connected to the first push rod moving seat. A second bearing seat is arranged at the top of the first push rod moving seat, and a sliding groove is arranged at the bottom of the first push rod moving seat. The second telescopic part further includes a second electric push rod, and a third bearing seat is arranged at the top of the second push rod moving seat.

[0011] As a further improvement of the present invention, the spinning drive part includes a first drive motor and a first motor support frame. The first motor support frame is located at the top of the first push rod moving seat and is connected thereto. The first drive motor is located at the top of the first motor support frame and is connected thereto. The shaping drive part includes a second drive motor and a second motor support frame. The second motor support frame is located at the top of the second push rod moving seat and is connected thereto. The second drive motor is located at the top of the second motor support frame and is connected thereto.

[0012] As a further improvement of the present invention, the spinning shaft assembly includes a spinning shaft, a spinning wheel, a limiting block, a positioning pin and a set screw. The spinning shaft is connected to the protruding shaft of the first drive motor through a coupling. A shoulder is arranged at the bottom end of the spinning shaft, and the spinning wheel and the spinning shaft are clamped by the shoulder of the spinning shaft and the set screw. A limiting block is arranged at the top of the spinning wheel, and the connection between the spinning shaft and the limiting block is realized through the positioning pin.

[0013] As a further improvement of the present invention, the shaping shaft assembly includes a shaping shaft, a shaping wheel, a limiting block, a positioning pin and a set screw. The shaping shaft is connected to the protruding shaft of the second drive motor through a coupling. A shoulder is arranged at the bottom end of the shaping shaft, and the shaping wheel and the shaping shaft are clamped by the shoulder of the shaping shaft and the set screw. A limiting block is also arranged at the top of the shaping wheel, and the connection between the shaping shaft and the limiting block is realized through the positioning pin.

[0014] As a further improvement of the present invention, the center distance between the spinning shaft and the main transmission shaft is equal to the center distance between the shaping shaft and the main transmission shaft. The outer diameter D1 of the spinning wheel and the outer diameter D2 of the shaping wheel have the following relationship: D2 < D1 < D2 + 2e, where e is the maximum radial springback of the hub blank.

[0015] The present invention also provides a usage method of a hub spinning forming device, and the usage method includes the following steps:

[0016] S1. Synchronously extend the first telescopic part and the second telescopic part so that they move simultaneously in the axial direction of the main transmission shaft at a preset feed speed;

[0017] S2. When the spinning wheel of the spinning shaft assembly contacts the main transmission shaft, start the external reducer, the first driving motor and the second driving motor, and maintain the feed speed in step S1;

[0018] S3. The hub blank rotates driven by the main transmission shaft and is spun into a groove by the spinning wheel;

[0019] S4. The spun groove in step S3 contacts the shaping wheel of the shaping shaft assembly to shape the springback amount of the spun groove;

[0020] S5. When the feed amount of the hub blank reaches the preset value, stop the feed of the first telescopic part and the second telescopic part, and keep the external reducer, the first driving motor and the second driving motor rotating;

[0021] S6. After a set time, stop the operation of the external reducer, the first driving motor and the second driving motor;

[0022] S7. Synchronously contract the first telescopic part and the second telescopic part so that they move away from the axial direction of the main transmission shaft at a preset feed speed;

[0023] S8. After the hub blank is cooled, it is separated from the main transmission shaft part, and a new hub blank to be processed is connected to the main transmission shaft part, and the hub blank is spun and formed according to the above steps S1 - S7.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) A hub spinning and forming device provided by the present invention realizes the organic unity of high-precision forming and high-efficiency production through the collaborative operation design of the spinning wheel and the shaping wheel and the precise feed control system, effectively extends the service life of the tool, and significantly reduces the production cost.

[0026] (2) The present invention not only solves the problem of controlling material springback, but also improves the forming accuracy; specifically, through the design of the dimensional relationship between the spinning wheel and the shaping wheel (D2 < D1 < D2 + 2e) and the same center distance layout, after the spinning wheel completes the main deformation, the subsequent shaping wheel immediately compensates and shapes the springback amount, effectively controlling the material springback problem; at the same time, the precise control of the shaping wheel improves the accuracy of the radial dimension of the contour, greatly reducing the risk of stress concentration and cracks in the key areas of the hub (such as the rim corner and the spoke connection).

[0027] (3) The present invention not only improves the spinning efficiency but also ensures the surface quality. Specifically, through the independent control of the main drive shaft, the first drive motor, and the second drive motor, a differential cooperative working mode of the spinning wheel with low speed and high torque and the shaping wheel with high speed and low torque is realized. Combined with the precise synchronous feeding of the first telescopic part and the second telescopic part, the deformation process and the finishing process are continuously completed in one processing cycle. This working method eliminates the multiple processing steps and additional finishing processes required in the traditional process.

[0028] (4) The present invention not only reduces the tool wear but also extends the service life of the equipment. Specifically, through a scientific load distribution mechanism, the spinning wheel mainly undertakes the task of large deformation of the material, while the shaping wheel is only responsible for light-load finishing, significantly reducing the stress on a single tool. At the same time, the design of the set screw and the limit block enables the spinning wheel and the shaping wheel to be quickly disassembled and replaced, greatly reducing the production downtime and maintenance cost. Brief Description of the Drawings

[0029] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 is the present invention Figure 1 schematic diagram of the overall structure after removing the sealing door;

[0031] Figure 3 is the present invention Figure 2 partial enlarged view;

[0032] Figure 4 is a schematic diagram of the structure of the main drive shaft part of the present invention;

[0033] Figure 5 is a schematic diagram of the main drive shaft of the present invention;

[0034] Figure 6 is a schematic diagram of the structure of the working chamber of the present invention;

[0035] Figure 7 is a schematic diagram of the structure of the first telescopic part of the present invention;

[0036] Figure 8 is a schematic diagram of the structure of the second telescopic part of the present invention;

[0037] Figure 9 is a schematic diagram of the structure of the spinning drive part of the present invention;

[0038] Figure 10 is a schematic diagram of the structure of the spinning shaft assembly of the present invention;

[0039] Figure 11 is a schematic diagram of the internal structure of the spinning shaft assembly of the present invention;

[0040] Figure 12 It is a schematic structural diagram of the spinning shaft of the present invention;

[0041] Figure 13 It is a schematic structural diagram of the sizing shaft assembly of the present invention.

[0042] In the figure: 100, main drive shaft part; 101, hub blank; 110, main drive shaft; 111, main shaft shoulder; 112, limiting groove; 113, positioning threaded hole; 120, first bearing seat; 130, pressing block; 140, pressing bolt; 200, working chamber; 201, first groove; 202, slide rail; 203, second groove; 300, first telescopic part; 310, support seat; 320, first electric push rod; 330, push rod connecting plate; 340, second bearing seat; 350, first push rod moving seat; 351, sliding groove; 400, second telescopic part; 420, first electric push rod; 440, third bearing seat; 450, second push rod moving seat; 500, sealing door; 600, spinning drive part; 610, first drive motor; 620, first motor support frame; 700, sizing drive part; 710, second drive motor; 720, second motor support frame; 800, spinning shaft assembly; 810, spinning shaft; 820, spinning wheel; 830, limiting block; 840, positioning pin; 850, set screw; 900, sizing shaft assembly; 910, sizing shaft; 920, sizing wheel. Specific embodiments

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc. indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0045] It should be understood that in the description of the invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense.

[0046] Example 1: Refer to the appendix Figures 1 to 13, a hub spinning forming device provided in Embodiment 1 of the present invention includes a hub blank 101, and further includes a main drive shaft portion 100 and a working chamber 200. The main drive shaft portion 100 extends into the interior of the working chamber 200, and the hub blank 101 is limited by the main drive shaft portion 100. A first telescopic portion 300 and a second telescopic portion 400 are provided at the top of the working chamber 200. A sealing door 500 is provided on the front of the working chamber 200. A spinning drive portion 600 is provided at the top of the first push rod moving seat 350 of the first telescopic portion 300. A shaping drive portion 700 is provided at the top of the second push rod moving seat 450 of the second telescopic portion 400. A spinning shaft assembly 800 is connected below the spinning drive portion 600 through a coupling. A shaping shaft assembly 900 is connected below the shaping drive portion 700 through a coupling.

[0047] The main drive shaft portion 100 includes a main drive shaft 110 and a first bearing seat 120. The main drive shaft 110 passes through the first bearing seat 120. The main drive shaft 110 is connected to an external speed reducer (not shown in the figure). A main shaft shoulder 111 is provided on the main drive shaft 110. The hub blank 101 is clamped on the main shaft shoulder 111. A pressing block 130 and a pressing bolt 140 are provided at the top of the hub blank 101.

[0048] The main drive shaft 110 is further provided with a plurality of limiting grooves 112. A positioning threaded hole 113 is opened in the limiting grooves 112. The pressing bolt 140 passes through the through hole of the pressing block 130 and the positioning threaded hole 113 and is locked to realize the clamping of the main drive shaft portion 100 and the hub blank 101.

[0049] A first groove 201 is opened on the front of the working chamber 200 to realize the rotational connection between the sealing door 500 and the working chamber 200 through the first groove 201. A plurality of slide rails 202 and second grooves 203 are provided at the top of the working chamber 200, and the second groove 203 is located in the middle of the adjacent second grooves 203 in the front and back.

[0050] It is not difficult to understand that through the cooperation of the main shaft shoulder 111, the pressing block 130 and the pressing bolt 140, the hub blank 101 can be reliably connected to the main drive shaft 110. After the hub blank 101 is spun formed, the pressing block 130 and the pressing bolt 140 are disassembled, and the spun formed hub can be separated from the main drive shaft 110. Further, the rotational connection between the sealing door 500 and the working chamber 200 through the first groove 201 belongs to the existing mature technology, and the sealing door can be conveniently opened and closed through a door lock and a handle.

[0051] The first telescopic part 300 further includes a support base 310 and a first electric push rod 320 connected thereto. The support base 310 is located at the top of the working chamber 200. The other end of the first electric push rod 320 is connected to a push rod connecting plate 330. The push rod connecting plate 330 is connected to a first push rod moving seat 350. A second bearing seat 340 is provided at the top of the first push rod moving seat 350, and a sliding groove 351 is provided at the bottom of the first push rod moving seat 350.

[0052] The second telescopic part 400 further includes a second electric push rod 420. The two ends of the second electric push rod 420 are respectively connected to the support base 310 and the push rod connecting plate 330 of the second telescopic part 400. The push rod connecting plate 330 of the second telescopic part 400 is connected to a second push rod moving seat 450. A sliding groove 351 is provided at the bottom of the second push rod moving seat 450, and a third bearing seat 440 is provided at the top of the second push rod moving seat 450.

[0053] It is not difficult to understand that the synchronous movement of the first telescopic part 300 and the second telescopic part 400 can be achieved through a PLC control system or a controller.

[0054] It should be noted that the first bearing seat 120, the second bearing seat 340, and the third bearing seat 440 of the present invention all contain matching bearings, which conveniently realize the rotation of each rotating part.

[0055] The spinning drive part 600 includes a first drive motor 610 and a first motor support frame 620. The first motor support frame 620 is located at the top of the first push rod moving seat 350 and is connected thereto. The first drive motor 610 is located at the top of the first motor support frame 620 and is connected thereto.

[0056] The shaping drive part 700 includes a second drive motor 710 and a second motor support frame 720. The second motor support frame 720 is located at the top of the second push rod moving seat 450 and is connected thereto. The second drive motor 710 is located at the top of the second motor support frame 720 and is connected thereto.

[0057] The spinning shaft assembly 800 includes a spinning shaft 810, a spinning wheel 820, a limit block 830, a positioning pin 840, and a set screw 850. The spinning shaft 810 is connected to the protruding shaft of the first drive motor 610 through a coupling. A shoulder is provided at the bottom end of the spinning shaft 810. The spinning wheel 820 and the spinning shaft 810 are clamped by the shoulder of the spinning shaft 810 and the set screw 850. A limit block 830 is provided at the top of the spinning wheel 820, and the connection between the spinning shaft 810 and the limit block 830 is realized through the positioning pin 840.

[0058] The sizing shaft assembly 900 includes a sizing shaft 910, a sizing wheel 920, a limit block 830, a positioning pin 840, and a set screw 850. The sizing shaft 910 is connected to the protruding shaft of the second drive motor 710 through a coupling. A shaft shoulder is provided at the bottom end of the sizing shaft 910. The sizing wheel 920 and the sizing shaft 910 are clamped by the shaft shoulder of the sizing shaft 910 and the set screw 850. A limit block 830 is also provided at the top of the sizing wheel 920. The connection between the sizing shaft 910 and the limit block 830 is achieved through the positioning pin 840.

[0059] It should be noted that the reduction gear connected to the main drive shaft 110 has a relatively low rotational speed, driving the hub blank 101 to rotate. The first drive motor 610 generally selects a motor with a relatively high rotational speed and large power, so as to generate a large force on the spinning wheel 820, facilitating the formation of a spinning groove on the hub blank 101. The second drive motor 710 generally selects a high-speed and low-power motor to drive the sizing wheel 920 to rotate at a high speed to size the springback amount of the spinning groove.

[0060] The center distance between the spinning shaft 810 and the main drive shaft 110 is equal to the center distance between the sizing shaft 910 and the main drive shaft 110. The following relationship exists between the outer diameter D1 of the spinning wheel 820 and the outer diameter D2 of the sizing wheel 920: D2 < D1 < D2 + 2e, where e is the maximum radial springback amount of the hub blank 101.

[0061] That is to say, as shown in Figure 2 and Figure 3 shown, when the spinning wheel 820 just contacts the hub blank 101, the sizing wheel 920 does not contact the hub blank 101, and there is a gap between them, so that the sizing wheel 920 only processes the springback part of the spinning groove, and even some parts do not need to be processed. Therefore, the sizing wheel 920 does not require as large a torque as the spinning wheel 820.

[0062] The present invention also provides a usage method of a hub spinning forming device. The usage method includes the following steps:

[0063] S1. Synchronously extend the first telescopic part 300 and the second telescopic part 400, and move them simultaneously in the axial direction of the main drive shaft 110 at a preset feed speed;

[0064] S2. When the spinning wheel 820 of the spinning shaft assembly 800 contacts the main drive shaft 110, start the external reduction gear, the first drive motor 610, and the second drive motor 710, and maintain the feed speed in step S1;

[0065] S3. The hub blank 101 rotates driven by the main drive shaft 110 and is spun into a groove by the spinning wheel 820;

[0066] In S4, the spinning groove in the S3 step contacts the shaping wheel 920 of the shaping shaft assembly 900 to shape the springback amount of the spinning groove;

[0067] In S5, when the feed amount of the hub blank 101 reaches the preset value, stop the feeding of the first telescopic part 300 and the second telescopic part 400, and make the external reducer, the first driving motor 610 and the second driving motor 710 continue to rotate;

[0068] In S6, after a set time, stop the operation of the external reducer, the first driving motor 610 and the second driving motor 710;

[0069] In S7, synchronously contract the first telescopic part 300 and the second telescopic part 400 so that they move away from the axis direction of the main transmission shaft 110 at the preset feed speed;

[0070] In S8, after the hub blank 101 is cooled, it is separated from the main transmission shaft part 100, and a new hub blank 101 to be processed is connected to the main transmission shaft part 100, and the spinning forming of the hub blank 101 is carried out according to the above S1-S7 steps.

[0071] It should be noted that for hubs made of different materials, the maximum radial springback amount e of the hub blank 101 is different. The outer diameter D2 of the shaping wheel 920 in the initial state can be selected according to the outer diameter D1 of the spinning wheel 820 and the maximum radial springback amount e of different hub blanks 101. Even in some extreme cases, the previously used shaping wheel can be continued to be used. Only on the basis that the already spun hub blank 101 is separated from the spinning wheel 820, the shaping of the spinning groove can be realized by separately extending the second telescopic part 400.

[0072] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wheel hub spinning forming device, comprising a wheel hub blank (101), characterized in that: The invention also includes a main transmission shaft (100) and a working chamber (200), wherein the main transmission shaft (100) extends into the interior of the working chamber (200), and the hub blank (101) is limited by the main transmission shaft (100). A first telescopic part (300) and a second telescopic part (400) are arranged on the top of the working chamber (200), and a sealing door (500) is arranged on the front of the working chamber (200). A spinning drive part (600) is arranged on the top of a first push rod movable seat (350) of the first telescopic part (300), and a shaping drive part (700) is arranged on the top of a second push rod movable seat (450) of the second telescopic part (400). A spinning shaft assembly (800) is connected to the bottom of the spinning drive part (600) via a coupling, and a shaping shaft assembly (900) is connected to the bottom of the shaping drive part (700) via a coupling.

2. The wheel hub spinning forming device according to claim 1, characterized in that: The main transmission shaft portion (100) comprises a main transmission shaft (110) and a first bearing seat (120); a main shaft shoulder (111) is arranged on the main transmission shaft (110); the wheel hub blank (101) is clamped on the main shaft shoulder (111); a clamping block (130) and a clamping bolt (140) are arranged on the top of the wheel hub blank (101).

3. The wheel hub spinning forming device according to claim 2, characterized in that: The main transmission shaft (110) is also provided with a plurality of limiting grooves (112), and the limiting grooves (112) are provided with positioning threaded holes (113). The clamping bolts (140) pass through the through holes of the clamping block (130) and the positioning threaded holes (113) and are locked, thereby achieving the engagement between the main transmission shaft (100) and the wheel hub blank (101).

4. The wheel hub spinning forming device according to claim 2, characterized in that: The front side of the working chamber (200) is provided with a first groove (201), and the sealing door (500) is rotatably connected to the working chamber (200) through the first groove (201). The top of the working chamber (200) is provided with a plurality of slide rails (202) and a second groove (203), wherein the second groove (203) is located in the middle of the adjacent second groove (203).

5. The wheel hub spinning forming device according to claim 4, characterized in that: The first telescopic part (300) also includes a support seat (310) and a first electric push rod (320) connected thereto, wherein the support seat (310) is located at the top of the working chamber (200), the other end of the first electric push rod (320) is connected to a push rod connecting plate (330), and the push rod connecting plate (330) is connected to the first push rod moving seat (350), a second bearing seat (340) is arranged at the top of the first push rod moving seat (350), and a sliding groove (351) is arranged at the bottom of the first push rod moving seat (350); the second telescopic part (400) also includes a second electric push rod (420), and a third bearing seat (440) is arranged at the top of the second push rod moving seat (450).

6. The wheel hub spinning forming device according to claim 5, characterized in that: The spinning drive unit (600) includes a first driving motor (610) and a first motor support frame (620), wherein the first motor support frame (620) is located at the top of the first push rod moving seat (350) and connected thereto, and the first driving motor (610) is located at the top of the first motor support frame (620) and connected thereto. The shaping drive unit (700) includes a second driving motor (710) and a second motor support frame (720), wherein the second motor support frame (720) is located at the top of the second push rod moving seat (450) and connected thereto, and the second driving motor (710) is located at the top of the second motor support frame (720) and connected thereto.

7. The wheel hub spinning forming device according to claim 6, characterized in that: The spinning shaft assembly (800) comprises a spinning shaft (810), a spinning wheel (820), a limit block (830), a positioning pin (840) and a set screw (850); the spinning shaft (810) is connected to the extended shaft of the first driving motor (610) via a coupling; a shoulder is provided at the bottom end of the spinning shaft (810); the spinning wheel (820) and the spinning shaft (810) are engaged via the shoulder of the spinning shaft (810) and the set screw (850); a limit block (830) is provided at the top of the spinning wheel (820); the connection between the spinning shaft (810) and the limit block (830) is achieved via the positioning pin (840).

8. The wheel hub spinning forming device according to claim 7, characterized in that: The shaping shaft assembly (900) comprises a shaping shaft (910), a shaping wheel (920), a limit block (830), a positioning pin (840) and a set screw (850); the shaping shaft (910) is connected to the extended shaft of the second drive motor (710) via a coupling; a shoulder is provided at the bottom end of the shaping shaft (910); the shaping wheel (920) and the shaping shaft (910) are engaged with each other via the shoulder of the shaping shaft (910) and the set screw (850); a limit block (830) is also provided at the top of the shaping wheel (920); and the connection between the shaping shaft (910) and the limit block (830) is achieved via the positioning pin (840).

9. The wheel hub spinning forming device according to claim 8, characterized in that: The center distance between the spinning axis (810) and the main transmission axis (110) is equal to the center distance between the shaping axis (910) and the main transmission axis (110), and the outer diameter D1 of the spinning wheel (820) and the outer diameter D2 of the shaping wheel (920) are in the following relationship: D2<D1<D2+2e, wherein e is the maximum radial springback of the hub blank (101).

10. The method for using the wheel hub spinning forming device according to any one of claims 1 to 9, characterized in that: The method of use includes the following steps: S1, synchronously extending the first telescopic part (300) and the second telescopic part (400) so that they move simultaneously in the axial direction of the main transmission shaft (110) at a preset feeding speed; S2, when the spinning wheel (820) of the spinning shaft assembly (800) contacts the main transmission shaft (110), the external reducer, the first drive motor (610) and the second drive motor (710) are started to maintain the feed speed in step S1; S3, the wheel hub blank (101) is rotated under the drive of the main transmission shaft (110), and is spun into a groove by the spinning wheel (820); S4, the spinning groove in step S3 contacts the shaping wheel (920) of the shaping shaft assembly (900), and the rebound amount of the spinning groove is shaped; S5, when the feeding amount of the wheel hub blank (101) reaches a preset value, the feeding of the first telescopic part (300) and the second telescopic part (400) is stopped, and the external reducer, the first drive motor (610) and the second drive motor (710) continue to rotate; S6, after a set time has passed, stopping the operation of the external reducer, the first drive motor (610) and the second drive motor (710); S7, synchronously contracting the first telescopic part (300) and the second telescopic part (400) so that they are simultaneously moved away from the axial direction of the main transmission shaft (110) at a preset feeding speed; S8, after the wheel hub blank (101) is cooled, it is separated from the main transmission shaft (100), and a new wheel hub blank (101) to be processed is connected to the main transmission shaft (100), and the wheel hub blank (101) is subjected to spin forming according to the above steps S1-S7.

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