A preheating spinning device for aluminum alloy wheel hubs

Abstract

This invention discloses a preheating spinning device for aluminum alloy wheel hubs, relating to the field of wheel hub spinning technology. It includes a preheating furnace, a spinning box, a robotic arm, and several mandrels. A support frame is installed inside the spinning box, and a multi-faceted rotating component is rotatably mounted on the support frame. A mounting plate is fixed to the side of the multi-faceted rotating component, and a rotating base plate is rotatably mounted in the center of the mounting plate. A positioning mechanism is provided on the rotating base plate. A horizontal plate is fixed to the top of the spinning box, and two symmetrically distributed spinning mechanisms are arranged below the horizontal plate. A drive mechanism for rotating the mandrels is provided on the inner side of the multi-faceted rotating component. This invention achieves mandrel switching by rotating the multi-faceted rotating component to face mandrels of different sizes upwards. When processing aluminum alloy wheel hubs of different sizes, only the multi-faceted rotating component needs to be rotated to switch the pre-installed mandrel to the processing position, eliminating the need for reinstalling the mandrels and repeated adjustments, resulting in high production efficiency.

Description

Technical Field

[0001] This invention relates to the field of wheel hub spinning technology, specifically to a preheating spinning device for aluminum alloy wheels. Background Technology

[0002] Preheat spinning of aluminum alloy wheels is an advanced process combining casting and spinning. First, the pre-cast wheel blank is preheated to 300℃-350℃ to reduce material hardness and resistance to deformation, facilitating subsequent processing. Then, using a spinning machine, the rim section is continuously rotated and compressed point by point, causing plastic deformation to form the desired shape. This process improves wheel strength, reduces weight, achieves high strength and lightweight construction, and results in small machining allowances and high product precision, making it an important development direction for aluminum alloy wheel manufacturing.

[0003] Spinning equipment is required for wheel hub spinning, such as the aluminum alloy wheel hub spinning die cooling equipment and method disclosed in patent publication number CN120885610A. This equipment includes a base plate, with a double-acting linear motor module fixedly connected to the top of the base plate. Support frames are fixedly connected to the top of each of the two drive ends of the double-acting linear motor module, and adjusters are fixedly connected to the sides of the support frames. Through the cooperation of rollers, rotating notched rings, adjusting blocks, support J-shaped blocks, support sliders, elastic rollers, pressure gauges, and pins, when cracks or peeling appear on the roller surface, the elastic roller drives the support slider to apply pressure to the detection end of the pressure gauge. By observing the pressure gauge reading, it can be determined whether cracks or peeling have appeared on the roller surface, thus preventing irregular contact surfaces between the roller surface and the wheel hub caused by cracks or peeling, which would lead to uneven pressure distribution on the wheel hub blank and thus deviations in the size and shape of the wheel hub.

[0004] Spinning of aluminum alloy wheels is divided into unidirectional spinning and bidirectional spinning. Unidirectional spinning equipment has lower cost and is more convenient to use. However, the unidirectional spinning equipment mentioned above and the existing production equipment used in unidirectional spinning have fixed mandrels. When the wheel size changes, the mandrel needs to be replaced and adjusted, which takes a long time and is not conducive to improving production efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a preheating spinning device for aluminum alloy wheel hubs to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a preheating spinning device for aluminum alloy wheel hubs, comprising a preheating furnace, a spinning box, a robotic arm located between the two, and several core molds. Material racks are provided on the sides of both the preheating furnace and the spinning box. A support frame is provided inside the spinning box, and a multi-faceted rotating component is rotatably mounted on the support frame. A switching motor for driving the multi-faceted rotating component is installed on the support frame. An mounting plate is fixed to the side of the multi-faceted rotating component, and a rotating base plate is rotatably mounted in the middle of the mounting plate. A positioning mechanism for fixing the core molds is provided on the rotating base plate. A horizontal plate is fixed to the top of the spinning box via multiple connecting rods. An extrusion cylinder is fixed below the horizontal plate, and a pressure plate for pressing the wheel hub is rotatably mounted at the lower end of the extrusion cylinder. Two symmetrically distributed spinning mechanisms are provided below the horizontal plate. A driving mechanism for rotating the core molds is provided inside the multi-faceted rotating component. A first insertion hole is opened in the middle of the mounting plate, and a second insertion hole is opened in the middle of the core molds, with the first and second insertion holes aligned.

[0007] Preferably, the positioning mechanism includes several frustum positioning columns fixed on the rotating base plate, and the frustum positioning columns are evenly distributed around the circumference. The upper end of the frustum positioning column is provided with a screw hole. The core mold is provided with several positioning holes, and the frustum positioning columns are inserted into the positioning holes at corresponding positions. The screw holes are threaded with fixing bolts, and a compression ring is sleeved below the bolt head of the fixing bolt. The bottom of the compression ring abuts against the core mold.

[0008] Preferably, the spinning mechanism includes two symmetrically distributed transverse slide rails fixed below the horizontal plate. Sliding seats are slidably mounted on the transverse slide rails, and a synchronization component is provided between the two sliding seats. A threaded rod and two guide rods are provided on the sliding seats, and a movable motor for driving the threaded rod to rotate is mounted on the sliding seats. A movable plate is slidably mounted on the guide rods, and the movable plate is threadedly connected to the threaded rod. A tension rope is connected between the outer side of the sliding seat and the end of the transverse slide rails. A fixed frame is fixed below the movable plate. A vertical slide rail is provided on the side of the fixed frame, and a lifting frame is slidably mounted on the vertical slide rail. A lifting cylinder for driving the lifting frame to move up and down is mounted on the side of the fixed frame. A spinning wheel is rotatably mounted on the lifting frame, and a spinning motor for driving the spinning wheel to rotate is mounted on the lifting frame.

[0009] Preferably, the synchronization component includes two racks fixed on the sliding seat, and a fixing ring is provided on the outer side of the extrusion cylinder. A toothed ring is rotatably provided on the outer side of the fixing ring. The two racks are located on both sides of the toothed ring and mesh with the toothed ring respectively. Two symmetrically distributed support plates are fixed on both sides of the lower end of the fixing ring, and a shoulder is provided on the outer side of the support plate. The racks are located above the support plate and inside the shoulder.

[0010] Preferably, the multi-faceted rotating component includes a polygonal plate fixed on the rotating shaft of the switching motor, and a vertical circular plate fixed on the other side of the support frame. Several rotating wheels are rotatably arranged on the edge of the vertical circular plate. A polygonal ring is rotatably sleeved on the outer side of the vertical circular plate, and the inner side of the polygonal ring abuts against the rotating wheels. The two sides of the mounting plate are respectively fixed to the sides of the polygonal plate and the polygonal ring.

[0011] Preferably, the driving mechanism includes a fixed frame fixed on a vertical circular plate, a vertical rail provided on the side of the fixed frame, a lifting frame slidably arranged on the vertical rail, a driving rod rotatably arranged at the upper end of the lifting frame, a drive motor for driving the driving rod to rotate installed on the inner side of the lifting frame, a lifting cylinder fixed on the side of the fixed frame, the lifting cylinder being located directly below the lifting frame, and the upper end of the lifting cylinder being fixedly connected to the bottom of the lifting frame.

[0012] Preferably, a limiting mechanism is provided on the outer side of the polygonal ring. The limiting mechanism includes a crossbeam fixed to the side of the support frame, a limiting cylinder is installed on the crossbeam, a limiting rod is fixed at the end of the limiting cylinder, a positioning frame is fixed above the end of the crossbeam near the polygonal ring, the limiting rod passes through the positioning frame, and a plurality of circumferentially distributed limiting holes are opened on the polygonal ring, with the end of the limiting rod inserted into the limiting hole.

[0013] Preferably, a linkage mechanism is provided between the limiting cylinder and the sliding seat. The linkage mechanism includes a vertical plate fixed to the end of the limiting cylinder, a fixed shaft fixed to the upper end of the vertical plate, two symmetrically distributed lifting grooves on the horizontal plate, a triangular plate slidingly arranged in the lifting grooves, and two extrusion blocks fixed on both sides of the sliding seat near the triangular plate. The extrusion blocks abut against the inclined side of the triangular plate, a linkage plate fixed to the lower end of the triangular plate, an inclined guide groove provided on the linkage plate, and the end of the fixed shaft slidingly arranged in the inclined guide groove. A sliding groove is provided inside the limiting rod, and an L-shaped rod is slidingly arranged in the sliding groove. The end of the L-shaped rod abuts against the bottom side of the core mold, and a limit switch is installed on the inner side of the sliding groove near the vertical plate.

[0014] Preferably, the linkage mechanism includes a vertical plate fixed to the end of the limiting cylinder, a fixed shaft fixed to the upper end of the vertical plate, two symmetrically distributed lifting grooves on the horizontal plate, a triangular plate slidingly arranged in the lifting grooves, and two extrusion blocks fixed on both sides of the sliding seat near the triangular plate, the extrusion blocks abutting against the inclined side of the triangular plate, a horizontal slot frame fixed to the lower end of the triangular plate, a vertical frame fixed on the horizontal frame, two driven rods rotatably connected to the upper end of the vertical frame, a driven rotating shaft fixed to the upper end of the two driven rods, the driven rotating shaft inserted into the horizontal slot frame, a driving rod fixed to the lower end of the driven rod, a moving slot opened on the driving rod, and both ends of the fixed shaft inserted into the moving slot, a sliding groove opened inside the limiting rod, and an L-shaped rod slidably arranged in the sliding groove, the end of the L-shaped rod abutting against the bottom side of the core mold, and a limit switch installed on the inner side of the sliding groove near the vertical plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] By rotating the multi-faceted rotating component, mandrels of different sizes are oriented upwards, enabling the switching of mandrels. The aluminum alloy wheel hub is heated in the preheating furnace and then transferred onto the mandrel. In conjunction with the spinning mechanism above, the aluminum alloy wheel hub can be spun from both sides. When processing aluminum alloy wheel hubs of different sizes, it is only necessary to rotate the multi-faceted rotating component to switch the pre-installed mandrel to the processing position. There is no need to reinstall the mandrel or make repeated adjustments, which improves the efficiency of replacement and production.

[0017] Meanwhile, by having two racks mesh with the same toothed ring, the sliding seats on both sides can move inward or outward synchronously. Moreover, the outer side of the rack is supported by the support plate and the shoulder, which can ensure its meshing state with the toothed ring, prevent the rack from separating from the toothed ring, and improve the structural strength. With the two sliding seats moving synchronously, the spinning effect can be further improved, and the stability of the spinning process can be enhanced.

[0018] Furthermore, by simultaneously inserting the limiting rod into the positioning frame and the limiting hole, the polygonal ring is fixed, improving the stability during the spinning process. When it is necessary to switch between different sizes of core molds, the limiting rod can be pulled out from the limiting hole by the limiting cylinder, and then the multi-faceted rotating part can be rotated to rotate the required core mold to the top. After that, the limiting rod can be inserted again for positioning.

[0019] In addition, during the advance process before the limit cylinder, the fixed shaft moves synchronously, moves in the inclined guide slot and pushes the triangular plate upward. If the size of the core mold is larger, the limit switch is triggered earlier, the triangular plate is lifted less, and the sliding seat is pushed less towards the center position. The initial position of the spinning mechanism can be automatically determined according to the size of the core mold, so that the spinning wheel is as close to the hub as possible, reducing blank stroke and improving production efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the spinning box in this invention;

[0022] Figure 3 This is a schematic diagram of the structure on the other side of the spinning box in this invention;

[0023] Figure 4 This is a schematic diagram of the positioning mechanism in this invention;

[0024] Figure 5 This is a schematic diagram of the fixing bolt in this invention;

[0025] Figure 6 This is a schematic diagram of the spinning mechanism in this invention;

[0026] Figure 7 This is a schematic diagram of the multi-faceted rotating component in this invention;

[0027] Figure 8 This is a schematic diagram of the linkage mechanism in Embodiment 1 of the present invention;

[0028] Figure 9 This is a partial structural schematic diagram of the linkage mechanism in this invention;

[0029] Figure 10 This is a schematic diagram of the linkage mechanism in Embodiment 2 of the present invention.

[0030] In the diagram: 1. Preheating furnace; 2. Spinning box; 3. Robotic arm; 4. Material rack; 5. Support frame; 6. Switching motor; 7. Mounting plate; 8. Rotating base plate; 9. Core mold; 10. Horizontal plate; 11. Extrusion cylinder; 12. Pressure plate; 13. First insertion hole; 14. Second insertion hole; 15. Frustum positioning column; 16. Positioning hole; 17. Fixing bolt; 18. Extrusion ring; 19. Transverse slide rail; 20. Sliding seat; 21. Guide rod; 22. Threaded rod; 23. Moving motor; 24. Moving plate; 25. Tension rope; 26. Fixed frame; 27. Lifting frame; 28. Lifting cylinder; 29. ​​Spinning wheel; 30. Spinning motor; 31. Rack; 32. Gear ring; 3 3. Support plate; 34. Polygonal plate; 35. Polygonal ring; 36. Vertical circular plate; 37. Rotary wheel; 38. Fixed frame; 39. Vertical track; 40. Lifting frame; 41. Drive rod; 42. Drive motor; 43. Lifting cylinder; 44. Horizontal frame; 45. Positioning frame; 46. Limit cylinder; 47. Limit rod; 48. Limit hole; 49. Vertical plate; 50. Fixed shaft; 51. Lifting groove; 52. Extrusion block; 53. Triangular plate; 54. Linkage plate; 55. Inclined guide groove; 56. Slide groove; 57. L-shaped rod; 58. Limit switch; 59. Horizontal groove frame; 60. Vertical frame; 61. Driven rod; 62. Driving rod; 63. Moving groove. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1:

[0032] Multiple core molds are mounted on the same rotating structure. The corresponding core mold can be used when one side of the rotating structure is facing upwards. To replace a core mold, simply rotate the rotating structure; there is no need to reinstall it, which can improve the efficiency of mold changing.

[0033] like Figures 1-9 As shown, the present invention provides a technical solution: a preheating and spinning device for aluminum alloy wheel hubs, comprising a preheating furnace 1, a spinning box 2, a robotic arm 3 located between the two, and several mandrels 9. Material racks 4 are provided on the sides of both the preheating furnace 1 and the spinning box 2. A support frame 5 is provided inside the spinning box 2. A multi-faceted rotating component is rotatably mounted on the support frame 5, and a switching motor 6 for driving the multi-faceted rotating component is installed on the support frame 5. A mounting plate 7 is fixed to the side of the multi-faceted rotating component, and a rotating base plate 8 is rotatably mounted in the middle of the mounting plate 7. The rotating base plate 8... A positioning mechanism for fixing the core mold 9 is provided. A horizontal plate 10 is fixed to the top of the spinning box 2 by multiple connecting rods. An extrusion cylinder 11 is fixed below the horizontal plate 10. A pressure plate 12 for pressing the hub is rotatably set at the lower end of the extrusion cylinder 11. Two symmetrically distributed spinning mechanisms are set below the horizontal plate 10. A drive mechanism for driving the core mold 9 to rotate is set on the inner side of the multi-faceted rotating part. A first insertion hole 13 is opened in the middle of the mounting plate 7, and a second insertion hole 14 is opened in the middle of the core mold 9. The first insertion hole 13 and the second insertion hole 14 are aligned.

[0034] It should be noted that by switching the multi-faceted rotating component driven by the switching motor 6, the core molds 9 of different sizes are oriented upwards, thus achieving the switching of the core molds 9. The aluminum alloy wheel hub is heated by the preheating furnace 1 and then transferred to the core mold 9 by the robotic arm 3. Then, the pressure plate 12 presses the wheel hub, and with the spinning mechanism above, the aluminum alloy wheel hub can be spun from both sides. When processing aluminum alloy wheel hubs of different sizes, it is only necessary to rotate the multi-faceted rotating component to switch the pre-installed core mold 9 to the processing position. There is no need to reinstall the core mold 9, nor is it necessary to repeatedly adjust it, which improves the efficiency of replacement and production efficiency.

[0035] like Figure 4 and Figure 5 As shown, the positioning mechanism includes several frustum positioning posts 15 fixed on the rotating base plate 8, and the frustum positioning posts 15 are evenly distributed around the circumference. The upper end of the frustum positioning post 15 is provided with a screw hole. The core mold 9 is provided with several positioning holes 16, and the frustum positioning posts 15 are inserted into the positioning holes 16 at the corresponding positions. The screw holes are threaded with fixing bolts 17, and the bolt head of the fixing bolt 17 is fitted with a compression ring 18. The bottom of the compression ring 18 abuts against the core mold 9.

[0036] It should be noted that by pressing the core mold 9 onto the rotating base plate 8 with the fixing bolt 17, the center position of the core mold 9 can be quickly positioned under the action of the frustum positioning column 15, thereby fixing the core mold 9. Moreover, for aluminum alloy hubs of different thicknesses, extrusion rings 18 of different thicknesses can be selected, all of which can press the core mold 9 onto the rotating base plate 8, making installation convenient.

[0037] like Figure 6 As shown, the spinning mechanism includes two symmetrically distributed transverse slide rails 19 fixed below the horizontal plate 10. A sliding seat 20 is slidably mounted on the transverse slide rails 19, and a synchronization component is provided between the two sliding seats 20. A threaded rod 22 and two guide rods 21 are provided on the sliding seat 20, and a moving motor 23 for driving the threaded rod 22 to rotate is installed on the sliding seat 20. A moving plate 24 is slidably mounted on the guide rod 21, and the moving plate 24 is threadedly connected to the threaded rod 22. A tension rope 25 is connected between the outer side of the sliding seat 20 and the end of the transverse slide rail 19. A fixed frame 26 is fixed below the moving plate 24. A vertical slide rail is provided on the side of the fixed frame 26, and a lifting frame 27 is slidably mounted on the vertical slide rail. A lifting cylinder 28 for driving the lifting frame 27 to move up and down is installed on the side of the fixed frame 26. A spinning wheel 29 is rotatably mounted on the lifting frame 27, and a spinning motor 30 for driving the spinning wheel 29 to rotate is installed on the lifting frame 27.

[0038] It should be noted that the sliding seat 20 is located at different positions on the transverse slide rail 19, which can process aluminum alloy hubs of different sizes. The spinning motor 30 drives the spinning wheel 29 to rotate, and the threaded rod 22 drives the moving plate 24 to approach and fit the aluminum alloy hub, pressing the aluminum alloy hub onto the core mold 9. Then, under the drive of the lifting cylinder 28, it gradually moves downward to achieve the spinning effect. Moreover, the squeezing from both sides can prevent the core mold 9 and the hub from tilting to one side, thus improving the stability of spinning.

[0039] like Figure 6 As shown, the synchronization assembly includes two racks 31 fixed on the sliding seat 20, and a fixing ring is provided on the outer side of the extrusion cylinder 11. A toothed ring 32 is rotatably provided on the outer side of the fixing ring. The two racks 31 are located on both sides of the toothed ring 32 and mesh with the toothed ring 32 respectively. Two symmetrically distributed support plates 33 are fixed on both sides of the lower end of the fixing ring, and a shoulder is provided on the outer side of the support plate 33. The racks 31 are located above the support plate 33 and inside the shoulder.

[0040] It should be noted that by having two racks 31 mesh with the same toothed ring 32, the sliding seats 20 on both sides can move synchronously inward or outward. Moreover, the outer side of the rack 31 is supported by the support plate 33 and the shoulder, which can ensure its meshing state with the toothed ring 32, prevent the rack 31 from separating from the toothed ring 32, improve the structural strength, and further improve the spinning effect and the stability of the spinning process when the two sliding seats 20 move synchronously.

[0041] like Figure 7 As shown, the multi-faceted rotating component includes a polygonal plate 34 fixed on the rotating shaft of the switching motor 6, and a vertical circular plate 36 fixed on the other side of the support frame 5. Several rotating wheels 37 are rotatably arranged on the edge of the vertical circular plate 36. A polygonal ring 35 is rotatably sleeved on the outer side of the vertical circular plate 36, and the inner side of the polygonal ring 35 abuts against the rotating wheels 37. The two sides of the mounting plate 7 are respectively fixed to the sides of the polygonal plate 34 and the polygonal ring 35.

[0042] It should be noted that the polygonal ring 35 and the polygonal plate 34 are connected by the mounting plate 7. Switching the motor 6 can drive the polygonal ring 35 and the polygonal plate 34 to rotate synchronously. The inner side of the polygonal ring 35 rotates and rubs against the rotating wheel 37. The friction is small, and the rotation is smooth. Moreover, the inner side of the vertical circular plate 36 can provide an installation position for the drive mechanism.

[0043] like Figure 7 As shown, the driving mechanism includes a fixed frame 38 fixed on a vertical circular plate 36. A vertical rail 39 is provided on the side of the fixed frame 38. A lifting frame 40 is slidably arranged on the vertical rail 39. A driving rod 41 is rotatably arranged at the upper end of the lifting frame 40. A drive motor 42 for driving the driving rod 41 to rotate is installed on the inner side of the lifting frame 40. A lifting cylinder 43 is fixed on the side of the fixed frame 38. The lifting cylinder 43 is located directly below the lifting frame 40, and the upper end of the lifting cylinder 43 is fixedly connected to the bottom of the lifting frame 40.

[0044] It should be noted that during spinning, the lifting cylinder 43 lifts the drive rod 41 upward and inserts it into the first insertion hole 13. The drive motor 42 drives the drive rod 41 to rotate, thereby driving the core mold 9 to rotate and achieve spinning. After spinning is completed, the lifting cylinder 43 lifts the drive rod 41 upward again and passes it through the second insertion hole 14 to lift the spun aluminum alloy wheel hub, making it convenient for the robotic arm 3 to remove the wheel hub.

[0045] like Figure 7 and Figure 8As shown, a limiting mechanism is provided on the outer side of the polygonal ring 35. The limiting mechanism includes a crossbeam 44 fixed to the side of the support frame 5. A limiting cylinder 46 is installed on the crossbeam 44. A limiting rod 47 is fixed to the end of the limiting cylinder 46. A positioning frame 45 is fixed above one end of the crossbeam 44 near the polygonal ring 35. The limiting rod 47 passes through the positioning frame 45. Several circumferentially distributed limiting holes 48 are opened on the polygonal ring 35, and the end of the limiting rod 47 is inserted into the limiting hole 48.

[0046] It should be noted that by simultaneously inserting the limiting rod 47 into the positioning frame 45 and the limiting hole 48, the polygonal ring 35 is fixed, which improves the stability during the spinning process. When it is necessary to switch between different sizes of core molds 9, the limiting rod 47 can be pulled out from the limiting hole 48 by the limiting cylinder 46. Then, the multi-faceted rotating part can be rotated to rotate the required core mold 9 to the top, and the limiting rod 47 can be inserted again for positioning.

[0047] like Figure 6 , Figure 8 and Figure 9 As shown, a linkage mechanism is provided between the limiting cylinder 46 and the sliding seat 20. The linkage mechanism includes a vertical plate 49 fixed to the end of the limiting cylinder 46, a fixed shaft 50 fixed to the upper end of the vertical plate 49, two symmetrically distributed lifting grooves 51 on the horizontal plate 10, a triangular plate 53 is slidably arranged in the lifting groove 51, and two extrusion blocks 52 are fixed on both sides of the sliding seat 20 near the triangular plate 53. The extrusion blocks 52 abut against the inclined side of the triangular plate 53. A linkage plate 54 is fixed to the lower end of the triangular plate 53. An inclined guide groove 55 is provided on the linkage plate 54, and the end of the fixed shaft 50 is slidably arranged in the inclined guide groove 55. A sliding groove 56 is provided inside the limiting rod 47, and an L-shaped rod 57 is slidably arranged in the sliding groove 56. The end of the L-shaped rod 57 abuts against the bottom side of the core mold 9, and a limit switch 58 is installed on the inner side of the sliding groove 56 near the vertical plate 49.

[0048] It should be noted that when the limiting rod 47 is inserted, the L-shaped rod 57 moves closer to the core mold 9 in sync with the limiting rod 47. The end of the L-shaped rod 57 stops moving after it abuts against the side of the core mold 9. At this time, the limiting rod 47 continues to move, and the limit switch 58 approaches the L-shaped rod 57. After the L-shaped rod 57 abuts against the limit switch 58, the limiting cylinder 46 stops advancing. Moreover, during the advance process before the limiting cylinder 46, the fixed shaft 50 moves synchronously, moves in the inclined guide slot 55, and pushes the triangular plate 53 upward. If the size of the core mold 9 is larger, the limit switch 58 is triggered earlier, the triangular plate 53 is lifted less, and the sliding seat 20 is pushed less towards the center position. The initial position of the spinning mechanism can be automatically determined according to the size of the core mold 9, so that the spinning wheel 29 is as close to the hub as possible, reducing blank stroke and improving production efficiency.

[0049] Moreover, during the spinning process, the spinning wheel 29 presses towards the center, and the sliding seat 20 will be subjected to an outward reaction force. At this time, the pressing block 52 will press against the triangular plate 53. The tilt angle between the two can be set as a self-locking tilt angle, which can prevent the triangular plate 53 from moving outward under the reaction force, while reducing the lateral pressure on the vertical plate 49 and the connecting plate 54, thus ensuring structural stability. Example 2:

[0050] In Embodiment 1, the inclined guide slot 55 is used to push the triangular plate 53 upward. However, there may be a large friction between the inner side of the inclined guide slot 55 and the fixed shaft 50, which is not conducive to long-term use. Therefore, this embodiment provides another linkage mechanism.

[0051] like Figure 10 As shown, the linkage mechanism includes a vertical plate 49 fixed to the end of the limiting cylinder 46. A fixed shaft 50 is fixed to the upper end of the vertical plate 49. Two symmetrically distributed lifting grooves 51 are opened on the horizontal plate 10. A triangular plate 53 is slidably arranged in the lifting groove 51. Two pressing blocks 52 are fixed on both sides of the sliding seat 20 near the triangular plate 53. The pressing blocks 52 abut against the inclined side of the triangular plate 53. A horizontal slot frame 59 is fixed to the lower end of the triangular plate 53. A vertical frame 60 is fixed on the horizontal frame 44. The upper end of the vertical frame 60 is rotatably connected to... Two driven rods 61 are provided, with a driven rotating shaft fixed at the upper end of each rod 61 and inserted into the horizontal slot frame 59. A driving rod 62 is fixed at the lower end of each rod 61, and a moving slot 63 is provided on the driving rod 62. Both ends of the fixed shaft 50 are inserted into the moving slot 63. A sliding groove 56 is provided inside the limiting rod 47, and an L-shaped rod 57 is slidably arranged in the sliding groove 56. The end of the L-shaped rod 57 abuts against the bottom side of the core mold 9, and a limit switch 58 is installed on the inner side of the sliding groove 56 near the vertical plate 49.

[0052] It should be noted that, compared with Embodiment 1, this embodiment uses the horizontal movement of the fixed shaft 50 to drive the active rod 62 and the driven rod 61 to rotate, and then uses the swinging driven shaft to move the horizontal slot frame 59 and the triangular plate 53 up or down, which can reduce the friction force on the fixed shaft 50 and improve the service life of the structure.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A preheating and spinning device for aluminum alloy wheel hubs, comprising a preheating furnace (1), a spinning box (2), a robotic arm (3) located between the two, and a plurality of mandrels (9), characterized in that: The spinning box (2) is equipped with a support frame (5). A multi-faceted rotating component is rotatably mounted on the support frame (5), and a switching motor (6) for driving the multi-faceted rotating component is installed on the support frame (5). A mounting plate (7) is fixed on the side of the multi-faceted rotating component. A rotating base plate (8) is rotatably mounted in the middle of the mounting plate (7). A positioning mechanism for fixing the core mold (9) is provided on the rotating base plate (8). A horizontal plate (10) is fixed to the top of the spinning box (2) by multiple connecting rods. An extrusion cylinder (11) is fixed below the horizontal plate (10). A pressure plate (12) for pressing the hub is rotatably mounted at the lower end of the extrusion cylinder (11). Two symmetrically distributed spinning mechanisms are provided below the horizontal plate (10). A mechanism for driving the multi-faceted rotating component is provided on the inner side. The drive mechanism for rotating the core mold (9) has a first insertion hole (13) in the middle of the mounting plate (7) and a second insertion hole (14) in the middle of the core mold (9), with the first insertion hole (13) and the second insertion hole (14) aligned. The spinning mechanism includes two symmetrically distributed transverse slide rails (19) fixed below the horizontal plate (10). A sliding seat (20) is slidably mounted on the transverse slide rails (19), and a synchronization component is provided between the two sliding seats (20). A threaded rod (22) and two guide rods (21) are provided on the sliding seat (20), and a moving motor (23) for driving the threaded rod (22) to rotate is mounted on the sliding seat (20). A moving plate (24) is slidably mounted on the guide rod (21). A tension rope (25) is connected between the outer side of the sliding seat (20) and the end of the transverse slide rail (19) and the threaded rod (22). A fixed frame (26) is fixed below the moving plate (24). A vertical slide rail is provided on the side of the fixed frame (26), and a lifting frame (27) is slidably provided on the vertical slide rail. A lifting cylinder (28) for driving the lifting frame (27) to move up and down is installed on the side of the fixed frame (26). A spinning wheel (29) is rotatably provided on the lifting frame (27), and a spinning motor (30) for driving the spinning wheel (29) to rotate is installed on the lifting frame (27). The synchronization component includes two racks (31) fixed on the sliding seat (20), and a fixing ring is provided on the outer side of the extrusion cylinder (11). A toothed ring (32) is rotatably provided on the outer side of the fixed ring. Two racks (31) are located on both sides of the toothed ring (32) and mesh with the toothed ring (32). Two symmetrically distributed support plates (33) are fixed on both sides of the lower end of the fixed ring. A shoulder is provided on the outer side of the support plate (33). The racks (31) are located above the support plate (33) and inside the shoulder. The multi-faceted rotating component includes a polygonal plate (34) fixed on the rotating shaft of the switching motor (6). A vertical circular plate (36) is fixed on the other side of the support frame (5). Several rotating wheels (37) are rotatably provided on the edge of the vertical circular plate (36). A polygonal ring (35) is rotatably sleeved on the outer side of the vertical circular plate (36). The inner side of the polygonal ring (35) abuts against the rotating wheel (37).The mounting plate (7) is fixed to the sides of the polygonal plate (34) and the polygonal ring (35) respectively; The polygonal ring (35) is provided with a limiting mechanism on the outside. The limiting mechanism includes a cross frame (44) fixed on the side of the support frame (5). A limiting cylinder (46) is installed on the cross frame (44). A limiting rod (47) is fixed at the end of the limiting cylinder (46). A positioning frame (45) is fixed above the end of the cross frame (44) near the polygonal ring (35). The limiting rod (47) passes through the positioning frame (45). A number of circumferentially distributed limiting holes (48) are opened on the polygonal ring (35), and the end of the limiting rod (47) is inserted into the limiting hole (48). A linkage mechanism is provided between the limiting cylinder (46) and the sliding seat (20). The linkage mechanism includes a vertical plate (49) fixed to the end of the limiting cylinder (46), a fixed shaft (50) fixed to the upper end of the vertical plate (49), and two symmetrically distributed lifting grooves (51) on the horizontal plate (10). A triangular plate (53) is slidably arranged in the lifting groove (51), and two pressing blocks (52) are fixed on both sides of the sliding seat (20) near the triangular plate (53). The pressing blocks (52) and the triangular plate (53) are connected by a linkage mechanism. The inclined sides abut against each other, and the lower end of the triangular plate (53) is fixed with a connecting plate (54). The connecting plate (54) is provided with an inclined guide groove (55), and the end of the fixed shaft (50) is slidably disposed in the inclined guide groove (55). The limit plug (47) is provided with a sliding groove (56), and an L-shaped rod (57) is slidably disposed in the sliding groove (56). The end of the L-shaped rod (57) abuts against the bottom side of the core mold (9), and a limit switch (58) is installed on the inner side of the sliding groove (56) near the vertical plate (49).

2. The preheating spinning equipment for aluminum alloy wheel hubs according to claim 1, characterized in that: The positioning mechanism includes several frustum positioning columns (15) fixed on the rotating base plate (8), and the frustum positioning columns (15) are evenly distributed around the circumference. The upper end of the frustum positioning column (15) is provided with a screw hole. The core mold (9) is provided with several positioning holes (16), and the frustum positioning column (15) is inserted into the positioning hole (16) at the corresponding position. The screw hole is threaded with a fixing bolt (17), and a compression ring (18) is sleeved below the bolt head of the fixing bolt (17). The bottom of the compression ring (18) abuts against the core mold (9).

3. The preheating spinning equipment for aluminum alloy wheel hubs according to claim 1, characterized in that: The driving mechanism includes a fixed frame (38) fixed on a vertical circular plate (36), a vertical rail (39) is provided on the side of the fixed frame (38), a lifting frame (40) is slidably provided on the vertical rail (39), a driving rod (41) is rotatably provided at the upper end of the lifting frame (40), a driving motor (42) for driving the driving rod (41) to rotate is installed on the inner side of the lifting frame (40), a lifting cylinder (43) is fixed on the side of the fixed frame (38), the lifting cylinder (43) is located directly below the lifting frame (40), and the upper end of the lifting cylinder (43) is fixedly connected to the bottom of the lifting frame (40).

4. A preheating and spinning device for aluminum alloy wheel hubs, comprising a preheating furnace (1), a spinning box (2), a robotic arm (3) located between the two, and a plurality of mandrels (9), characterized in that: The spinning box (2) is equipped with a support frame (5). A multi-faceted rotating component is rotatably mounted on the support frame (5), and a switching motor (6) for driving the multi-faceted rotating component is installed on the support frame (5). A mounting plate (7) is fixed on the side of the multi-faceted rotating component. A rotating base plate (8) is rotatably mounted in the middle of the mounting plate (7). A positioning mechanism for fixing the core mold (9) is provided on the rotating base plate (8). A horizontal plate (10) is fixed to the top of the spinning box (2) by multiple connecting rods. An extrusion cylinder (11) is fixed below the horizontal plate (10). A pressure plate (12) for pressing the hub is rotatably mounted at the lower end of the extrusion cylinder (11). Two symmetrically distributed spinning mechanisms are provided below the horizontal plate (10). A mechanism for driving the multi-faceted rotating component is provided on the inner side. The drive mechanism for rotating the core mold (9) has a first insertion hole (13) in the middle of the mounting plate (7) and a second insertion hole (14) in the middle of the core mold (9), with the first insertion hole (13) and the second insertion hole (14) aligned. The spinning mechanism includes two symmetrically distributed transverse slide rails (19) fixed below the horizontal plate (10). A sliding seat (20) is slidably mounted on the transverse slide rails (19), and a synchronization component is provided between the two sliding seats (20). A threaded rod (22) and two guide rods (21) are provided on the sliding seat (20), and a moving motor (23) for driving the threaded rod (22) to rotate is mounted on the sliding seat (20). A moving plate (24) is slidably mounted on the guide rod (21). A tension rope (25) is connected between the outer side of the sliding seat (20) and the end of the transverse slide rail (19) and the threaded rod (22). A fixed frame (26) is fixed below the moving plate (24). A vertical slide rail is provided on the side of the fixed frame (26), and a lifting frame (27) is slidably provided on the vertical slide rail. A lifting cylinder (28) for driving the lifting frame (27) to move up and down is installed on the side of the fixed frame (26). A spinning wheel (29) is rotatably provided on the lifting frame (27), and a spinning motor (30) for driving the spinning wheel (29) to rotate is installed on the lifting frame (27). The synchronization component includes two racks (31) fixed on the sliding seat (20), and a fixing ring is provided on the outer side of the extrusion cylinder (11). A toothed ring (32) is rotatably provided on the outer side of the fixed ring. Two racks (31) are located on both sides of the toothed ring (32) and mesh with the toothed ring (32). Two symmetrically distributed support plates (33) are fixed on both sides of the lower end of the fixed ring. A shoulder is provided on the outer side of the support plate (33). The racks (31) are located above the support plate (33) and inside the shoulder. The multi-faceted rotating component includes a polygonal plate (34) fixed on the rotating shaft of the switching motor (6). A vertical circular plate (36) is fixed on the other side of the support frame (5). Several rotating wheels (37) are rotatably provided on the edge of the vertical circular plate (36). A polygonal ring (35) is rotatably sleeved on the outer side of the vertical circular plate (36). The inner side of the polygonal ring (35) abuts against the rotating wheel (37).The mounting plate (7) is fixed to the sides of the polygonal plate (34) and the polygonal ring (35) respectively; The polygonal ring (35) is provided with a limiting mechanism on the outside. The limiting mechanism includes a cross frame (44) fixed on the side of the support frame (5). A limiting cylinder (46) is installed on the cross frame (44). A limiting rod (47) is fixed at the end of the limiting cylinder (46). A positioning frame (45) is fixed above the end of the cross frame (44) near the polygonal ring (35). The limiting rod (47) passes through the positioning frame (45). A number of circumferentially distributed limiting holes (48) are opened on the polygonal ring (35), and the end of the limiting rod (47) is inserted into the limiting hole (48). A linkage mechanism is provided between the limiting cylinder (46) and the sliding seat (20). The linkage mechanism includes a vertical plate (49) fixed to the end of the limiting cylinder (46). A fixed shaft (50) is fixed to the upper end of the vertical plate (49). Two symmetrically distributed lifting grooves (51) are opened on the horizontal plate (10). A triangular plate (53) is slidably arranged in the lifting groove (51). Two extrusion blocks (52) are fixed on both sides of the sliding seat (20) near the triangular plate (53). The extrusion blocks (52) abut against the inclined side of the triangular plate (53). A horizontal slot frame (59) is fixed to the lower end of the triangular plate (53). A vertical frame (60) is fixed on the horizontal frame (44). The upper end of the frame (60) is rotatably connected to two driven rods (61). The upper ends of the two driven rods (61) are fixed with driven shafts, and the driven shafts are inserted into the horizontal slot frame (59). The lower end of the driven rods (61) is fixed with a driving rod (62). The driving rod (62) has a moving slot (63), and the two ends of the fixed shaft (50) are inserted into the moving slot (63). The limiting rod (47) has a sliding groove (56) inside, and an L-shaped rod (57) is slidably arranged in the sliding groove (56). The end of the L-shaped rod (57) abuts against the bottom side of the core mold (9), and a limit switch (58) is installed on the inner side of the sliding groove (56) near the vertical plate (49).

Images