Spinning die for automobile aluminum alloy hub

Abstract

The invention relates to the technical field of automobile hub dies, in particular to an automobile aluminum alloy hub spinning die which comprises a spinning shell, a rotating seat and a supporting seat, the rotating seat and the supporting seat are arranged on the inner top wall and the inner bottom wall of the spinning shell respectively, and spinning mechanisms are arranged on the two inner walls of the spinning shell. The spinning mechanism comprises a preheating unit, a radial limiting unit and a driving unit. Through the preheating unit arranged in the spinning mechanism, in the contact and spinning process of the forming mold and a blank, the forming mold absorbs heat energy and is stably heated, cooling liquid is conveyed through the water inlet pipeline, the cooling liquid flows through the forming mold, absorbs the heat energy and then is collected into the water collecting box, and the heat energy in the high-temperature cooling liquid is efficiently absorbed by the heat conducting plate and the heat conducting box; and therefore, the forming mold can be maintained in a stable temperature interval in subsequent recycling, and thermal stress generated by overlarge temperature difference between the mold and a high-temperature blank is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of automotive wheel hub mold technology, and in particular to an automotive aluminum alloy wheel hub spinning mold. Background Technology

[0002] Aluminum alloy automotive wheels are a type of automotive wheel made primarily of aluminum-silicon alloys. They are characterized by their light weight, rapid heat dissipation, and good shock absorption performance, and are widely used in passenger cars and racing cars. Their manufacturing processes include gravity casting, low-pressure casting, and spinning forming technologies. The main material is A356 aluminum alloy, which contains elements such as aluminum, silicon, and magnesium. A balance between lightweight and high strength is achieved through structural design and process optimization.

[0003] Spinning involves fixing a flat or hollow blank onto a die in a spinning machine. While the blank rotates with the machine spindle, pressure is applied to the blank using spinning wheels or steel bars, causing localized plastic deformation. Spinning is a special forming method that can be used to perform processes such as deep drawing, flanging, necking, bulging, and curling of various shapes of rotating bodies.

[0004] A search revealed an invention patent that discloses a wheel hub spinning die (publication number: CN116037750B), comprising: a lower die assembly and a pressure plate for pressing a wheel hub casting onto the lower die assembly; the pressure plate has a spoke top pressing surface for pressing the spokes in the wheel hub casting. This invention provides a wheel hub spinning die that can press the casting firmly without causing deformation of the spokes.

[0005] However, the existing technology described above still has the following problems: Although increasing the clamping force area between the pressure plate and the cast wheel hub ensures reliable clamping of the cast wheel spokes and solves the problem of the pressure plate only clamping the cast wheel hub at the rim, resulting in a small force area during the spinning process that causes rim collapse and wheel core floating, most existing automotive aluminum alloy wheel hub spinning dies require the blank to be heated to a certain temperature before spinning. This causes the heat energy from the blank surface to be transferred to the spinning die when the spinning die comes into contact with the blank, causing its temperature to rise sharply. The spinning die may generate thermal stress on its surface due to repeated hot and cold cycles. Long-term high temperature can also cause the die material to temper and soften, resulting in thermal deformation such as cavity collapse and dimensional expansion. This causes thermal cracks on the surface of the spinning die and eventually leads to the peeling off of the spinning die skin. As a result, the spinning die can cause scratches on the surface of the wheel hub during the production of automotive aluminum alloy wheels, affecting the quality of the finished wheel hub.

[0006] Therefore, the present invention provides a spinning die for automotive aluminum alloy wheels to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art by proposing a spinning die for automotive aluminum alloy wheel hubs.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A spinning die for automotive aluminum alloy wheels includes: a spinning housing, a rotating seat and a support seat respectively disposed on the top wall and bottom wall of the spinning housing, and a spinning mechanism is provided on both inner walls of the spinning housing; The spinning mechanism includes a preheating unit, a radial limiting unit, and a driving unit; The preheating unit includes a water collection box, a delivery pipe, a heat-conducting plate, a heat-conducting box, and a water inlet pipe. The water collection box is symmetrically fixed inside the spinning shell. The delivery pipe is located on the upper surface of the water collection box and is connected to the water collection box. The heat-conducting plate is longitudinally inserted into the interior of the water collection box. The heat-conducting box is fixedly located on the upper surface of multiple heat-conducting plates. The water inlet pipe is connected to an external coolant storage device via a water pump for delivering coolant.

[0009] Preferably, the spinning mechanism further includes multiple mounting plates that are symmetrically fixed to both sides of the spinning housing surface by bolts. A robotic arm is fixedly mounted on the surface of the mounting plate, and the end effectors of the multiple robotic arms are jointly fixedly mounted to a fixed box that is slidably connected inside the spinning housing. A drive motor is mounted on the upper surface of the fixed box.

[0010] Preferably, the spinning mechanism further includes a drive shaft fixedly disposed at the output end of the drive motor. One end of the drive shaft passes through the fixed box and is fixedly disposed with a forming mold rotatably connected to the inside of the spinning housing and having a cooling circuit inside. The lower surface of the forming mold is fixedly disposed with a conveying pipe, and the conveying pipe is connected to the forming mold.

[0011] Preferably, the heat-conducting box is fitted onto the surface of the molding die and is rotatably connected to the drive shaft. One end of the water inlet pipe is connected to the cooling circuit provided inside the molding die. The heat-conducting plate is slidably connected to the water collection box and moves with the fixed box.

[0012] Preferably, the radial limiting unit includes a sleeve that is rotatably fitted onto the surface of the drive shaft and fixedly connected to the fixed box. The inner wall of the sleeve is provided with a gap from the surface of the drive shaft. Support rods are fixedly arranged in a ring array around the sleeve on the surface of the sleeve.

[0013] Preferably, the radial limiting unit further includes wedge blocks that are slidably inserted into the sleeve and arranged in a ring array around the sleeve on the surface of the drive shaft. The lower surfaces of the multiple wedge blocks are fixedly connected to a temperature control push rod assembly that is fixedly disposed with the molding die, and a temperature sensor is provided inside the push rod assembly. The temperature sensor inside the temperature control push rod assembly senses the heat energy of the molding die and starts the drive unit through the external control system to drive the wedge blocks to move.

[0014] Preferably, the drive unit further includes an electric push rod symmetrically arranged on the upper surface of the molding die and fixedly connected to the output end temperature control push rod assembly. The electric push rod is used to control the displacement of the wedge block. Limiting rings are attached to both sides of the surface of the molding die, and multiple identical connecting rods are arranged inside the limiting rings.

[0015] Preferably, the water collection box is used to store the coolant after heat absorption, and a drain pipe connected to an external coolant storage device is fixedly provided on one side of the water collection box. The drain pipe is used to transport the coolant after heat absorption to the water inlet pipe.

[0016] Preferably, a flexible lubricating block that is fixedly connected to the heat-conducting box is attached to the surface of the molding mold. The flexible lubricating block is filled with lubricating fluid. After being attached to the molding mold, a lubricating film is formed on the surface of the molding mold.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This device uses a preheating unit built into the spinning mechanism to allow the forming mold to absorb heat and steadily heat up during the contact between the forming mold and the blank and during the spinning process. Coolant is delivered through the water inlet pipe. The coolant flows through the forming mold, absorbs heat, and then flows into the water collection box. The heat in the high-temperature coolant is absorbed by the heat conduction plate and the heat conduction box, and then heats the forming mold in the reverse direction. This allows the forming mold to maintain a stable temperature range during subsequent cycles of use, effectively avoiding thermal stress caused by excessive temperature difference between the mold and the high-temperature blank, preventing the surface from peeling off due to thermal stress accumulation after long-term use of the mold, and ensuring the spinning quality of automotive aluminum alloy wheel hubs. 2. Based on the structural design of the radial limiting unit, when the drive shaft is affected by high temperature and tends to deform, the sleeve can first form a radial limit on the drive shaft to suppress the deformation. At the same time, the electric push rod drives the temperature control push rod assembly to move, causing the wedge block to slide along the surface of the drive shaft and insert into the inside of the sleeve, further reducing the effective space inside the sleeve and strengthening the limiting rigidity. This can effectively curb the large deformation of the drive shaft, prevent it from causing the forming mold to shift, and prevent the wheel hub size accuracy from exceeding the tolerance range. This not only ensures the quality of the aluminum alloy wheel hub spinning product, but also avoids the downtime for adjustment caused by mold shift, ensuring stable production efficiency. 3. Through the design of the temperature-controlled push rod assembly, the radial limiting unit and the preheating unit are organically linked. When the preheating unit regulates the temperature of the forming mold, the heat is synchronously transferred to the temperature-controlled push rod assembly, which senses the change in ambient heat and activates the electric push rod through the change in ambient heat. This causes the push rod to produce controllable deformation, thereby pushing the wedge block to move precisely. Combined with the curvature design of the wedge block surface, the depth of the wedge block inserted into the sleeve can be precisely controlled by its own displacement distance, realizing the dynamic adjustment of the gap between the drive shaft and the sleeve. This makes the radial limiting strength and the preheating temperature form an adaptive linkage, improving the coaxiality of the forming mold and the drive shaft, optimizing the spinning forming accuracy, and further ensuring the finished product quality of automotive aluminum alloy wheels. 4. Through the coordinated operation of structures such as the limiting ring and connecting rod, this device transfers the radial load borne by the forming mold to the limiting ring when the forming mold spins the blank. Then, the limiting ring and connecting rod evenly distribute the load to the end of the forming mold away from the blank, avoiding the forming mold from bearing radial stress in a local area alone. This achieves uniform transmission and distribution of the load, further ensuring the coaxiality stability of the drive shaft and the forming mold, and extending the service life of the mold. Attached Figure Description

[0018] Figure 1 This is a front structural diagram of a spinning die for automotive aluminum alloy wheels proposed in this invention. Figure 2 This is a schematic diagram of the back structure of a spinning die for automotive aluminum alloy wheels proposed in this invention; Figure 3 This is a schematic diagram of the spinning mechanism of an automotive aluminum alloy wheel hub spinning die proposed in this invention; Figure 4 This is a schematic diagram of the preheating unit structure of an automotive aluminum alloy wheel hub spinning die proposed in this invention; Figure 5 This is a schematic diagram of the preheating unit, forming mold, and drainage pipe structure of an automotive aluminum alloy wheel hub spinning mold proposed in this invention. Figure 6 This is a schematic diagram of the drive shaft, forming mold, sleeve, and flexible lubricating block structure of an automotive aluminum alloy wheel hub spinning mold proposed in this invention.

[0019] Figure 7 This is a schematic diagram of the forming mold, drive shaft, wedge block, and electric push rod structure of an automotive aluminum alloy wheel hub spinning mold proposed in this invention.

[0020] Figure 8 This is a schematic diagram of the radial limiting unit and electric push rod structure of an automotive aluminum alloy wheel hub spinning mold proposed in this invention.

[0021] In the diagram: 1. Spinning shell; 2. Rotating seat; 3. Support seat; 4. Preheating unit; 401. Water collection box; 402. Conveying pipe; 403. Heat-conducting plate; 404. Heat-conducting box; 405. Water inlet pipe; 406. Drain pipe; 5. Radial limiting unit; 501. Sleeve; 502. Wedge block; 503. Temperature-controlled expansion push rod; 6. Drive unit; 601. Electric push rod; 602. Limiting ring; 603. Connecting rod; 7. Mounting plate; 8. Robotic arm; 9. Fixing box; 10. Drive motor; 11. Drive shaft; 12. Forming mold; 13. Flexible lubricating block. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] The terms used in this invention, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0024] Reference Figures 1-8 A spinning die for an aluminum alloy wheel hub includes: a spinning housing 1, a rotating seat 2 and a support seat 3 respectively disposed on the inner top wall and inner bottom wall of the spinning housing 1. The rotating seat 2 and the support seat 3 are used to support the blank of the aluminum alloy wheel hub and are connected to an external driving device to drive the blank to rotate inside the spinning housing 1. Both inner walls of the spinning housing 1 are provided with spinning mechanisms. Multiple holes are provided on both sides of the inner bottom wall of the spinning housing 1 for heat flow during the spinning process. The lower surface of the water collection box 401 has longitudinally distributed heat-conducting rods corresponding to the positions of the holes, which are used to transfer heat to the water collection box 401 and further increase the heat energy inside the water collection box 401. The spinning mechanism includes a preheating unit 4, a radial limiting unit 5, and a driving unit 6; The preheating unit 4 includes a water collection box 401, a delivery pipe 402, a heat-conducting plate 403, a heat-conducting box 404, and a water inlet pipe 405. The water collection box 401 is symmetrically fixed inside the spinning housing 1. The delivery pipe 402 is located on the upper surface of the water collection box 401 and is connected to the water collection box 401. The heat-conducting plate 403 is longitudinally inserted into the inside of the water collection box 401. The heat-conducting box 404 is fixedly located on the upper surface of multiple heat-conducting plates 403. The water inlet pipe 405 is connected to an external coolant storage device through a water pump for transporting coolant. The water collection box 401 is used to store the coolant after heat absorption, and a drain pipe 406 connected to an external coolant storage device is fixedly installed on one side of the water collection box 401. The drain pipe 406 is used to transport the coolant after heat absorption to the water inlet pipe 405. In the embodiment of the above technical solution, the blank is placed between the rotating seat 2 and the support seat 3. The forming mold 12 is brought into contact with the blank by the robotic arm 8 and the blank is spun. When the forming mold 12 comes into contact with the heated blank, the heat energy on the blank is transferred to the forming mold 12. At the same time, the heat generated by the friction between the forming mold 12 and the blank acts on the forming mold 12, causing the temperature of the forming mold 12 to rise. The coolant in the external coolant storage device is pumped through the water inlet pipe 405 to the molding mold 12 by the existing water pump. The coolant flows inside the molding mold 12 through the cooling circuit, absorbing the heat of the molding mold 12 and raising the temperature of the coolant. Finally, the coolant is discharged from the molding mold 12 through the delivery pipe 402 and delivered to the water collection box 401 for storage after the temperature rise. After the coolant is stored, the robotic arm 8 automatically drives the forming mold 12 to reset after the forming mold 12 completes the spinning process. This resets the heat conduction box 404, allowing the heat conduction plate 403 to be inserted into the water collection box 401 to absorb the heat in the water collection box 401. This utilizes the residual heat from the spinning process, transferring the heat energy to the heat conduction box 404 and heating and keeping the forming mold 12 warm. This prevents the forming mold 12 from cooling down too quickly due to the flow of coolant after use, ensuring that the forming mold 12 remains in a stable temperature range during subsequent cycles. This effectively avoids thermal stress caused by excessive temperature difference between the forming mold 12 and the high-temperature blank, preventing the surface from peeling off due to thermal stress accumulation after long-term service of the forming mold 12, and ensuring the spinning quality of automotive aluminum alloy wheels. Reference Figure 1 , Figure 2 and Figure 3 The spinning mechanism also includes multiple mounting plates 7 that are symmetrically fixed to both sides of the surface of the spinning housing 1 by bolts. The surface of the mounting plate 7 is fixedly provided with a robotic arm 8. The end effectors of the multiple robotic arms 8 are jointly fixedly provided with a fixed box 9 that is slidably connected inside the spinning housing 1. The upper surface of the fixed box 9 is provided with a drive motor 10. The installation plate 7 makes it easier to replace the robotic arm 8 and the fixing box 9, thereby facilitating the maintenance of all components in the preheating unit 4. The robotic arm 8 is an existing technology used to drive the multi-angle displacement of the forming mold 12, so that the forming mold 12 can adjust its own position according to the aluminum alloy wheel hub of the car, thereby improving the precision of wheel hub production; The fixing box 9 is used to fix the drive motor 10 and the molding die 12, etc. Reference Figure 4 and Figure 5 The spinning mechanism also includes a drive shaft 11 fixedly installed at the output end of the drive motor 10. One end of the drive shaft 11 passes through the fixed box 9 and is fixedly installed with a forming mold 12 rotatably connected to the inside of the spinning housing 1 and having a cooling circuit inside. The lower surface of the forming mold 12 is fixedly installed with the conveying pipe 402, and the conveying pipe 402 is connected to the forming mold 12. After the blank is successfully placed, the robotic arm 8 is started, and the forming mold 12 is driven to move to the designated position. Based on the setting of the drive motor 10, it drives the drive shaft 11 to rotate, so that the forming mold 12 rotates synchronously, and the forming mold 12 and the blank rotate synchronously to complete the spinning of the blank. Reference Figure 5 The heat-conducting box 404 is sleeved on the surface of the molding mold 12 and is rotatably connected to the drive shaft 11. The heat-conducting box 404 is adsorbed on the lower surface of the fixed box 9. One end of the water inlet pipe 405 is connected to the cooling circuit provided in the molding mold 12. The heat-conducting plate 403 is slidably connected to the water collection box 401. The heat-conducting plate 403 moves with the fixed box 9. By attaching the heat-conducting box 404 to the fixed box 9, the heat-conducting box 404 can move with the molding mold 12, protecting the side of the molding mold 12 away from the blank while regulating the temperature of the molding mold 12. When the temperature of the molding die 12 is too high, the heat energy is transferred to the heat conduction box 404, which dissipates heat during the movement, thus sharing some of the heat energy of the molding die 12. Reference Figure 6 The radial limiting unit 5 includes a sleeve 501 that is rotatably sleeved on the surface of the drive shaft 11 and fixedly connected to the fixed box 9. The inner wall of the sleeve 501 is provided with a gap from the surface of the drive shaft 11. Support rods are fixedly arranged in a ring array with the sleeve 501 as the center on the surface of the sleeve 501. Based on the sleeve 501, during the use of the drive shaft 11, it will absorb the heat from the molding die 12, causing thermal deformation of the drive shaft 11. The sleeve 501 is fitted onto the surface of the drive shaft 11 to form a radial limit on the drive shaft 11 and suppress the deformation. Furthermore, the support rod design makes the sleeve 501 more stable during use. Reference Figure 7 and Figure 8 The drive unit 6 also includes an electric push rod 601 that is symmetrically arranged on the upper surface of the molding die 12 and fixedly connected to the output end temperature control push rod assembly 503. The electric push rod 601 is used to control the displacement of the wedge block 502. Limiting rings 602 are attached to both sides of the surface of the molding die 12. Multiple identical connecting rods 603 are arranged inside the limiting rings 602. Meanwhile, when the sleeve 501 restricts the radial deformation of the drive shaft 11, the electric push rod 601 can drive the temperature control push rod assembly 503 to move, causing the wedge block 502 to move accordingly and be inserted into the inside of the sleeve 501, further reducing the gap between the sleeve 501 and the drive shaft 11, thereby strengthening the restriction strength of the sleeve 501 on the drive shaft 11, effectively curbing the large deformation of the drive shaft 11, preventing it from causing the forming mold 12 to shift, and preventing the wheel hub size accuracy from exceeding the tolerance range; The wedge block 502 is designed with an arc surface. During normal operation of the drive shaft 11, it will not come into contact with the drive shaft 11 to avoid increasing the friction of the drive shaft 11. However, when the drive shaft 11 deforms, the drive shaft 11 comes into contact with the wedge block 502 to limit the deformation of the drive shaft 11 and prevent the drive shaft 11 from undergoing large deformation. Through the coordinated operation of structures such as the limiting ring 602 and the connecting rod 603, when the forming mold 12 spins the blank, the radial load borne by the forming mold 12 is transferred to the limiting ring 602. Then, the limiting ring 602 and the connecting rod 603 evenly distribute the load to the end of the forming mold 12 away from the blank, so as to avoid the forming mold 12 from bearing radial stress in a local area alone, and to achieve uniform transmission and distribution of load. The radial limiting unit 5 also includes wedge blocks 502 that are slidably inserted into the sleeve 501 and arranged in a ring array around the sleeve 501 on the surface of the drive shaft 11. The lower surfaces of multiple wedge blocks 502 are fixedly connected to a temperature control push rod assembly 503 that is fixedly disposed with the molding mold 12. A temperature sensor is installed inside the assembly. The temperature sensor inside the temperature control push rod assembly 503 senses the heat energy of the molding mold 12 and starts the drive unit 6 through the external control system to drive the wedge blocks 502 to move. The temperature-controlled push rod assembly 503 consists of a metal pad and a push rod. It senses changes in ambient temperature through a temperature sensor. Based on the temperature monitored by the temperature sensor, the control system starts the electric push rod 601, drives the push rod to move, generates a controllable linear telescopic displacement, and drives the wedge block 502 to move. Through the design of the temperature-controlled push rod assembly 503, the radial limiting unit 5 and the preheating unit 4 are organically linked. When the preheating unit 4 regulates the temperature of the molding die 12, the heat is synchronously transferred to the temperature-controlled push rod assembly 503, which allows the temperature sensor inside to sense the ambient temperature and transmit the ambient temperature to the existing control system. This causes the control system to start the electric push rod 601, which drives the push rod to move and generate controllable deformation, thereby pushing the wedge block 502 to move precisely. Combined with the arc design of the surface of the wedge block 502, the depth of the wedge block 502 inserted into the sleeve 501 can be precisely controlled by its own displacement distance, realizing the dynamic adjustment of the gap between the drive shaft 11 and the sleeve 501. This allows the radial limiting strength and the preheating temperature to form an adaptive linkage, improving the coaxiality of the molding die 12 and the drive shaft 11. Reference Figure 7 The surface of the molding mold 12 is attached to a flexible lubricating block 13 that is fixedly connected to the heat conduction box 404. The flexible lubricating block 13 is filled with lubricating fluid. After it is attached to the molding mold 12, a lubricating film is formed on the surface of the molding mold 12. The flexible lubricating block 13 consists of an outer shell and an internal sponge pad. The shell is used to store lubricant, and the sponge pad is used to absorb the lubricant and apply it to the surface of the molding die 12 to form a lubricating film on the surface. By setting the flexible lubricating block 13, its surface is always in contact with the inner side of the flexible lubricating block 13 during the rotation of the forming mold 12. This allows the lubricant absorbed by the sponge pad to be applied to the forming mold 12, thus avoiding the problem that the sprayed lubricant will be thrown out due to the rotation of the forming mold 12, which would prevent the forming mold 12 from being unable to be lubricated and thus prevent the forming mold 12 from sticking together at the contact point with the blank and forming lumps, which would affect the finished quality of the automotive aluminum alloy wheel hub.

[0025] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A spinning die for automotive aluminum alloy wheels, comprising: The spinning shell (1), the rotating seat (2) and the support seat (3) respectively disposed on the inner top wall and inner bottom wall of the spinning shell (1), the rotating seat 2 and the support seat 3 are used to support the blank of the aluminum alloy wheel hub and are connected to the external driving equipment to drive the blank to rotate inside the spinning shell 1. The spinning shell (1) is characterized in that both inner walls of the spinning shell (1) are provided with spinning mechanisms. The spinning mechanism includes a preheating unit (4), a radial limiting unit (5), and a driving unit (6); The preheating unit (4) includes a water collection box (401), a delivery pipe (402), a heat-conducting plate (403), a heat-conducting box (404), and a water inlet pipe (405). The water collection box (401) is symmetrically fixed inside the spinning housing (1). The delivery pipe (402) is located on the upper surface of the water collection box (401) and is connected to the water collection box (401). The heat-conducting plate (403) is longitudinally inserted into the inside of the water collection box (401). The heat-conducting box (404) is fixedly located on the upper surface of multiple heat-conducting plates (403). The water inlet pipe (405) is connected to an external coolant storage device through a water pump for transporting coolant.

2. The automotive aluminum alloy wheel hub spinning die according to claim 1, characterized in that, The spinning mechanism also includes multiple mounting plates (7) that are symmetrically fixed to both sides of the surface of the spinning housing (1) by bolts. The surface of the mounting plate (7) is fixed with a robotic arm (8). The end effectors of the multiple robotic arms (8) are jointly fixed with a fixed box (9) that is slidably connected inside the spinning housing (1). The upper surface of the fixed box (9) is provided with a drive motor (10).

3. The automotive aluminum alloy wheel hub spinning die according to claim 2, characterized in that, The spinning mechanism also includes a drive shaft (11) fixedly installed at the output end of the drive motor (10). One end of the drive shaft (11) passes through the fixed box (9) and is fixedly installed with a forming mold (12) rotatably connected to the inside of the spinning housing (1) and having a cooling circuit inside. The lower surface of the forming mold (12) is fixedly installed with the conveying pipe (402), and the conveying pipe (402) is connected to the forming mold (12).

4. The automotive aluminum alloy wheel hub spinning die according to claim 3, characterized in that, The heat-conducting box (404) is fitted onto the surface of the molding mold (12) and is rotatably connected to the drive shaft (11). One end of the water inlet pipe (405) is connected to the cooling circuit provided inside the molding mold (12). The heat-conducting plate (403) is slidably connected to the water collection box (401). The heat-conducting plate (403) moves with the fixed box (9).

5. The automotive aluminum alloy wheel hub spinning die according to claim 3, characterized in that, The radial limiting unit (5) includes a sleeve (501) that is rotatably sleeved on the surface of the drive shaft (11) and fixedly connected to the fixed box (9). The inner wall of the sleeve (501) is provided with a gap from the surface of the drive shaft (11). Support rods are fixedly arranged in a ring array with the sleeve (501) as the center on the surface of the sleeve (501).

6. The automotive aluminum alloy wheel hub spinning die according to claim 5, characterized in that, The radial limiting unit (5) further includes wedge blocks (502) that are slidably inserted into the sleeve (501) and arranged in a ring array around the sleeve (501) on the surface of the drive shaft (11). The lower surfaces of the multiple wedge blocks (502) are fixedly connected to a temperature control push rod assembly (503) that is fixedly set with the molding mold (12), and a temperature sensor is provided inside it. The temperature sensor inside the temperature control push rod assembly (503) senses the heat energy of the molding mold (12) and starts the drive unit (6) through the external control system to drive the wedge blocks (502) to move.

7. The automotive aluminum alloy wheel hub spinning die according to claim 6, characterized in that, The drive unit (6) also includes an electric push rod (601) which is symmetrically arranged on the upper surface of the molding die (12) and fixedly connected to the output end temperature control push rod assembly (503). The electric push rod (601) is used to control the displacement of the wedge block (502). Limiting rings (602) are attached to both sides of the surface of the molding die (12). Multiple identical connecting rods (603) are arranged inside the limiting rings (602).

8. The automotive aluminum alloy wheel hub spinning die according to claim 3, characterized in that, The water collection box (401) is used to store the coolant after heat absorption, and a drain pipe (406) connected to an external coolant storage device is fixedly provided on one side of the water collection box (401). The drain pipe (406) is used to transport the coolant after heat absorption to the water inlet pipe (405).

9. The automotive aluminum alloy wheel hub spinning die according to claim 3, characterized in that, The surface of the molding die (12) is fitted with a flexible lubricating block (13) that is fixedly connected to the heat-conducting box (404). The flexible lubricating block (13) is filled with lubricating fluid. After it is fitted with the molding die (12), a lubricating film is formed on the surface of the molding die (12).

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