Device and method for reducing casting cracks of aluminum alloy hub

Abstract

The invention belongs to the technical field of aluminum alloy hub production, and discloses a device for reducing aluminum alloy hub casting cracks, which comprises a mold seat, two mold boxes which are symmetrically distributed left and right are hinged to the upper end of a bottom plate of the mold seat, the two mold boxes are in contact with each other, and the upper ends of the two mold boxes are jointly in sliding connection with a mold cover; the left portion of the upper end of the mold cover is fixedly connected with a casting pipe, the right portion of the upper end of the mold cover is fixedly connected with an exhaust pipe, the exhaust pipe makes contact with a mold box on the right side of the mold base, an auxiliary limiting mechanism is arranged on the mold cover, a quick disassembling mechanism is arranged on the exhaust pipe, and a quick connecting mechanism is arranged on the casting pipe. A mold plate is fixedly connected to the upper end of a bottom plate of the mold base and makes contact with the mold box, and a mold core is fixedly connected to the center of the inner side of the mold cover. The device and method for reducing the casting cracks of the aluminum alloy hub have the beneficial effects that the hub is prevented from cracking, and the hub is convenient to demould.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum alloy wheel hub production, and in particular relates to a device and a method for reducing casting cracks of an aluminum alloy wheel hub. Background Art

[0002] Wheel hub, also known as wheel rim, is a cylindrical component that is used to support the tire inside the tire and is centrally mounted on the shaft. Common automobile wheel hubs include steel wheel hubs and aluminum alloy wheel hubs. Steel wheel hubs have high strength and are often used for large trucks; however, steel wheel hubs are heavy and have a single appearance, which does not conform to today's low-carbon and fashionable concepts and are gradually being replaced by aluminum alloy wheel hubs. At present, aluminum alloy wheel hubs have basically replaced traditional steel wheel hubs and become the mainstream of automobile wheel hubs. In the production of aluminum alloy wheel hubs, cracks are a common defect, especially in some wheel types with peculiar shapes such as small R angle at the root of the spokes, a certain lateral width, and a deep and relatively thin rim facade on the front of the product. Crack defects account for a high proportion, and in the process of casting the aluminum alloy wheel hub, the aluminum alloy wheel hub is not easy to demold from the inside of the mold. Therefore, it is necessary to design a device and method for reducing casting cracks of aluminum alloy wheel hubs. Summary of the invention

[0003] The purpose of the present invention is to provide a device and method for reducing casting cracks of aluminum alloy wheel hubs in order to solve the above problems, thereby solving the problems mentioned in the above background technology.

[0004] In order to solve the above problems, the present invention provides a device and method for reducing casting cracks of aluminum alloy wheel hub: A device for reducing casting cracks of an aluminum alloy wheel hub comprises a mold base, wherein the upper end of a bottom plate of the mold base is hinged with two mold boxes symmetrically distributed on the left and right, the two mold boxes are in contact with each other, the upper ends of the two mold boxes are slidably connected to a mold cover, the left upper end of the mold cover is fixedly connected to a casting pipe, the right upper end of the mold cover is fixedly connected to an exhaust pipe, the exhaust pipe is in contact with the mold box on the right side of the mold base, an auxiliary limiting mechanism is provided on the mold cover, a quick release mechanism is provided on the exhaust pipe, a quick connection mechanism is provided on the casting pipe, a mold plate is fixedly connected to the upper end of the bottom plate of the mold base, the mold plate is in contact with the mold box, and a mold core is fixedly connected to the inner center of the mold cover.

[0005] Preferably, a hydraulic cylinder is fixedly mounted on the upper end of the frame of the mold base, an output end of the hydraulic cylinder is fixedly connected to the mold cover, the mold core is in contact with the exhaust pipe, and the hydraulic cylinder can drive the mold cover to move.

[0006] Preferably, two model plates symmetrically distributed front and back are inserted into the upper end of the mold plate, the sides of the model plates are in contact with the mold box, the upper end of the model plates are in contact with the mold core, and the edges of the grooves inside the mold plates are thickened, so that the R angles of the hub spokes can be thickened.

[0007] Preferably, the auxiliary limiting mechanism includes a limiting seat, a limiting seat is arranged on the upper outer side of the mold box, the limiting seat penetrates the mold box and is slidably connected to the mold box, the limiting seat is fixedly connected to a guide rod on the side away from the mold box, the guide rod penetrates the mold cover and is slidably connected to the mold cover, the guide rod is fixedly connected to a handle at one end away from the mold box, a spring 1 is arranged on the outer side of the guide rod, one end of the spring 1 is fixedly connected to the limiting seat, and the other end of the spring 1 is fixedly connected to the mold cover, the handle is pulled, and the handle drives the limiting seat to move through the guide rod and compresses the spring 1, when the limiting seat is separated from the mold box, the hydraulic cylinder is started, and the hydraulic cylinder drives the mold cover to move upward, when the mold core inside the mold cover is separated from the mold box.

[0008] Preferably, the quick-release mechanism includes a fixed tube, the interior of the mold box on the right side of the mold seat is fixedly connected with a fixed tube, the interior of the fixed tube is slidably connected with a T-shaped frame, the upper end of the T-shaped frame is fixedly connected with a heat insulation seat, the lower left end of the heat insulation seat is fixedly connected with a limiting rod, a spring 2 is arranged on the outer side of the T-shaped frame, and the exhaust pipe is in contact with the fixed tube.

[0009] Preferably, one end of the second spring is fixedly connected to the T-frame, the other end of the second spring is fixedly connected to the fixed tube, the lower end of the thermal insulation seat is in contact with both the fixed tube and the exhaust pipe, the limit rod is slidably connected to the exhaust pipe, and the limit rod is slidably connected to the mold box. The second spring can drive the T-frame to automatically reset through elastic force, pull the thermal insulation seat upward, and the thermal insulation seat drives the limit rod to move and compress the second spring. When the limit rod is detached from the exhaust pipe, the exhaust pipe can be removed from the mold box.

[0010] Preferably, the quick connection mechanism includes a connecting cover, the upper end of the casting tube is slidably connected to the connecting cover, the inside of the casting tube is fixedly connected to two guide pins symmetrically distributed on the left and right, the outer side of the guide pin is slidably connected to an arc bar, and a spring three is arranged on the outer side of the guide pin, one end of the spring three is fixedly connected to the casting tube, and the other end of the spring three is fixedly connected to the arc bar, the arc bar is slidably connected to the casting tube, and the arc surface of the arc bar is slidably connected to the through hole of the connecting cover. It is only necessary to sleeve the connecting cover on the top of the casting tube and press downward with force. During the pressing process, the connecting cover pushes the arc bar into the inside of the casting tube and compresses the spring three. When the connecting cover is fitted with the casting tube, the spring three is reset. The spring three can drive the arc bar to slide into the through hole on the connecting cover through elastic force to limit the connecting cover, thereby making the connecting cover easier to connect.

[0011] The present invention also discloses a method for using the device for reducing casting cracks of an aluminum alloy wheel hub, comprising the following steps: Step 1: Thicken the wall thickness of the front rim near the R angle by 1-2mm to reduce the maximum plastic deformation, reduce the stress concentration during plastic deformation, reduce cracking defects, increase the R angle of the spoke root to 5-10°, reduce stress concentration, and reduce R angle crack defects; Step 2, put the heated and molten metal liquid into the interior of the die-casting machine. When the connecting cover is needed, it is only necessary to sleeve the connecting cover on the top of the casting pipe and press it down with force. During the pressing process, the connecting cover pushes the arc bar into the interior of the casting pipe and compresses the spring three. When the connecting cover is fitted with the casting pipe, the spring three is reset. The spring three can drive the arc bar to slide into the through hole on the connecting cover through elastic force to limit the connecting cover, so that the connecting cover can be more convenient to connect. Then, pour into the casting pipe through the connecting cover. During the casting process, the gas inside the mold box is discharged through the exhaust pipe. When the liquid level inside the exhaust pipe reaches a certain height, the casting can be completed. Step 3: After waiting for the workpiece inside the mold box to cool down, pull the handle, which drives the limit seat to move through the guide rod and compresses the spring 1. When the limit seat is separated from the mold box, start the hydraulic cylinder, which drives the mold cover to move upward. When the mold core inside the mold cover is separated from the mold box, pull the heat insulation seat upward, which drives the limit rod to move and compresses the spring 2. When the limit rod is separated from the exhaust pipe, the exhaust pipe can be removed from the mold box. Step 4: Flip the mold box to the position where the workpiece is separated, and the demoulding of the workpiece can be completed conveniently. During the demoulding process, the R corners of the spoke roots on the mold plate are thickened, which can effectively avoid cracks on the wheel hub; Step 5. When the wheel hub cools down to below 100℃, you can put the wheel hub into 40-50℃ warm water for cooling. After cooling, perform high-temperature annealing at a water temperature of 80-85℃, which can effectively prevent cracks in the wheel hub.

[0012] The beneficial effects of the present invention are as follows: the disclosed device and method for reducing casting cracks of an aluminum alloy wheel hub have the characteristics of preventing cracks from appearing on the wheel hub and facilitating demoulding of the wheel hub. In specific use, compared with the conventional device and method for reducing casting cracks of an aluminum alloy wheel hub, the device and method for reducing casting cracks of an aluminum alloy wheel hub have the following beneficial effects: First, by deepening the spokes of the hub inside the mold plate, the spokes of the hub can be thickened after casting, and the wall thickness of the front rim near the R angle can be thickened, which can reduce the maximum plastic deformation, reduce the stress concentration during plastic deformation recovery, and reduce cracking defects, thereby effectively reducing cracks in the hub.

[0013] Secondly, by adding two hinged mold boxes to the mold base, the two hinged mold boxes can be flipped and separated during demoulding, and the exhaust pipe can be quickly disassembled through the quick release mechanism during the separation process, so that the wheel hub can be more easily demoulded. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and the accompanying drawings.

[0015] Figure 1 . A three-dimensional diagram of the overall structure of the present invention; Figure 2 . The present invention Figure 1 A three-dimensional cross-sectional view of Figure 3 . The present invention Figure 2 The local structure diagram of Figure 4 . The present invention Figure 3 A front cross-sectional view of Figure 5 . The present invention Figure 3 A front enlarged cross-sectional view of a connection cover; Figure 6 . The present invention Figure 4 A magnified view of the structure of part A; Figure 7 . The present invention Figure 4 A magnified view of the structure of part B; Figure 8 . The present invention Figure 5 Enlarged view of the C structure.

[0016] In the figure: 1. mold base; 2. mold box; 3. mold cover; 4. casting pipe; 5. exhaust pipe; 6. auxiliary limiting mechanism; 7. quick release mechanism; 8. quick connection mechanism; 9. hydraulic cylinder; 10. mold plate; 11. mold core; 12. model plate; 61. limiting seat; 62. guide rod; 63. handle; 64. spring one; 71. fixing tube; 72. T-frame; 73. spring two; 74. heat insulation seat; 75. limiting rod; 81. connecting cover; 82. guide pin; 83. arc strip; 84. spring three. Implementation

[0017] like Figure 1-8 As shown, this specific implementation adopts the following technical solutions: A device for reducing casting cracks of an aluminum alloy wheel hub comprises a mold base 1, wherein the upper end of the bottom plate of the mold base 1 is hinged with two mold boxes 2 which are symmetrically distributed on the left and right sides, the two mold boxes 2 are in contact with each other, the upper ends of the two mold boxes 2 are slidably connected with a mold cover 3, the upper left part of the upper end of the mold cover 3 is fixedly connected with a casting pipe 4, the upper right part of the upper end of the mold cover 3 is fixedly connected with an exhaust pipe 5, the exhaust pipe 5 is in contact with the mold box 2 on the right side of the mold base 1, the upper end of the bottom plate of the mold base 1 is fixedly connected with a mold plate 10, the mold plate 10 is in contact with the mold box 2, ... mold plate 10 is fixedly connected with the mold box 2, the mold cover 3 is fixedly connected with a casting pipe 4, the upper left part of the upper end of the mold cover 3 is fixedly connected with an exhaust pipe 5, the exhaust pipe 5 is in contact with the mold box 2 on the right side of the mold base 1, the mold plate 10 is fixedly connected with the mold box 2, the mold cover 3 is fixedly connected with a casting pipe 4, the upper right part of the upper end of the mold cover A mold core 11 is fixedly connected at the inner center, a hydraulic cylinder 9 is fixedly installed on the upper end of the frame of the mold base 1, the output end of the hydraulic cylinder 9 is fixedly connected to the mold cover 3, the mold core 11 is in contact with the exhaust pipe 5, the hydraulic cylinder 9 can drive the mold cover 3 to move, and two model plates 12 symmetrically distributed front and back are plugged into the upper end of the mold plate 10, the side of the model plate 12 is in contact with the mold box 2, and the upper end of the model plate 12 is in contact with the mold core 11. The edge of the groove inside the mold plate 10 is thickened, so that the R angle of the hub spoke can be thickened.

[0018] Among them, an auxiliary limiting mechanism 6 is provided on the mold cover 3, and the auxiliary limiting mechanism 6 includes a limiting seat 61. A limiting seat 61 is provided on the upper outer side of the mold box 2, and the limiting seat 61 penetrates the mold box 2 and is slidably connected to the mold box 2. A guide rod 62 is fixedly connected to the side of the limiting seat 61 away from the mold box 2, and the guide rod 62 penetrates the mold cover 3 and is slidably connected to the mold cover 3. A handle 63 is fixedly connected to the end of the guide rod 62 away from the mold box 2, and a spring 64 is provided on the outer side of the guide rod 62, one end of the spring 64 is fixedly connected to the limiting seat 61, and the other end of the spring 64 is fixedly connected to the mold cover 3. When the handle 63 is pulled, the handle 63 drives the limiting seat 61 to move through the guide rod 62 and compresses the spring 64. When the limiting seat 61 is separated from the mold box 2, the hydraulic cylinder 9 is started, and the hydraulic cylinder 9 drives the mold cover 3 to move upward. When the mold core 11 inside the mold cover 3 is separated from the mold box 2.

[0019] The exhaust pipe 5 is provided with a quick release mechanism 7, which includes a fixed tube 71. The inside of the mold box 2 on the right side of the mold seat 1 is fixedly connected with the fixed tube 71. The inside of the fixed tube 71 is slidably connected with a T-shaped frame 72. The upper end of the T-shaped frame 72 is fixedly connected with a heat insulation seat 74. The lower left end of the heat insulation seat 74 is fixedly connected with a limit rod 75. A spring 2 73 is provided on the outside of the T-shaped frame 72. The exhaust pipe 5 contacts the fixed tube 71. One end of the spring 2 73 is fixedly connected to the T-shaped frame 72. Then, the other end of the spring 2 73 is fixedly connected to the fixed tube 71, the lower end of the insulation seat 74 is in contact with both the fixed tube 71 and the exhaust pipe 5, the limit rod 75 is slidably connected to the exhaust pipe 5, and the limit rod 75 is slidably connected to the mold box 2. The spring 2 73 can drive the T-shaped frame 72 to automatically reset through elastic force, pull the insulation seat 74 upward, and the insulation seat 74 drives the limit rod 75 to move and compress the spring 2 73. When the limit rod 75 is separated from the exhaust pipe 5, the exhaust pipe 5 can be removed from the mold box 2.

[0020] The casting tube 4 is provided with a quick connection mechanism 8, and the quick connection mechanism 8 includes a connection cover 81. The upper end of the casting tube 4 is slidably connected to the connection cover 81. The inside of the casting tube 4 is fixedly connected to two guide pins 82 symmetrically distributed on the left and right. The outer side of the guide pin 82 is slidably connected to an arc bar 83. The outer side of the guide pin 82 is provided with a spring 3 84. One end of the spring 3 84 is fixedly connected to the casting tube 4, and the other end of the spring 3 84 is fixedly connected to the arc bar 83. The arc bar 83 is fixedly connected to the casting tube 4. 4 Sliding connection, the arc surface of the arc strip 83 is slidably connected with the through hole of the connecting cover 81. It is only necessary to sleeve the connecting cover 81 on the top of the casting pipe 4 and press it downward. During the pressing process, the connecting cover 81 pushes the arc strip 83 to the inside of the casting pipe 4 and compresses the spring three 84. When the connecting cover 81 is fitted with the casting pipe 4, the spring three 84 is reset. The spring three 84 can drive the arc strip 83 to slide into the through hole on the connecting cover 81 through elastic force to limit the connecting cover 81, so that the connecting cover 81 can be more convenient to connect.

[0021] A method for using a device for reducing casting cracks of an aluminum alloy wheel hub comprises the following steps: Step 1: Thicken the wall thickness of the front rim near the R angle by 1-2mm to reduce the maximum plastic deformation, reduce the stress concentration during plastic deformation, reduce cracking defects, increase the R angle of the spoke root to 5-10°, reduce stress concentration, and reduce R angle crack defects; Step 2, put the heated and molten metal liquid into the interior of the die-casting machine. When the connecting cover 81 is needed, it is only necessary to sleeve the connecting cover 81 on the top of the casting tube 4 and press it down with force. During the pressing process, the connecting cover 81 pushes the arc bar 83 into the interior of the casting tube 4 and compresses the spring three 84. When the connecting cover 81 is fitted with the casting tube 4, the spring three 84 is reset. The spring three 84 can drive the arc bar 83 to slide into the through hole on the connecting cover 81 through elastic force to limit the connecting cover 81, so that the connecting cover 81 can be more convenient to connect. Then, pouring is performed into the interior of the casting tube 4 through the connecting cover 81. During the casting process, the gas inside the mold box 2 is discharged through the exhaust pipe 5. When the liquid level inside the exhaust pipe 5 reaches a certain height, the casting can be completed. Step 3, after waiting for the workpiece inside the mold box 2 to cool down, pull the handle 63, the handle 63 drives the limit seat 61 to move through the guide rod 62, and compresses the spring 1 64, when the limit seat 61 is separated from the mold box 2, start the hydraulic cylinder 9, the hydraulic cylinder 9 drives the mold cover 3 to move upward, when the mold core 11 inside the mold cover 3 is separated from the mold box 2, pull the heat insulation seat 74 upward, the heat insulation seat 74 drives the limit rod 75 to move, and compresses the spring 2 73, when the limit rod 75 is separated from the exhaust pipe 5, the exhaust pipe 5 can be removed from the mold box 2; Step 4: Flip the mold box 2 to the position away from the workpiece, so that the demoulding of the workpiece can be completed conveniently. During the demoulding process, the R corners of the spoke roots on the mold plate 10 are thickened, which can effectively avoid cracks on the wheel hub; Step 5. When the wheel hub cools down to below 100℃, you can put the wheel hub into 40-50℃ warm water for cooling. After cooling, perform high-temperature annealing at a water temperature of 80-85℃, which can effectively prevent cracks in the wheel hub.

[0022] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for reducing casting cracks in an aluminum alloy wheel hub, comprising a die seat (1), characterized in that: The upper end of the bottom plate of the mold base (1) is hinged with two mold boxes (2) symmetrically distributed on the left and right sides, the two mold boxes (2) are in contact with each other, the upper ends of the two mold boxes (2) are slidably connected to a mold cover (3) together, the left upper end of the mold cover (3) is fixedly connected to a casting pipe (4), the right upper end of the mold cover (3) is fixedly connected to an exhaust pipe (5), the exhaust pipe (5) is in contact with the mold box (2) on the right side of the mold base (1), the mold cover (3) is provided with an auxiliary limiting mechanism (6), the exhaust pipe (5) is provided with a quick release mechanism (7), the casting pipe (4) is provided with a quick connection mechanism (8), the upper end of the bottom plate of the mold base (1) is fixedly connected to a mold plate (10), the mold plate (10) is in contact with the mold box (2), and the inner center of the mold cover (3) is fixedly connected to a mold core (11).

2. The device for reducing casting cracks of aluminum alloy wheel hub according to claim 1, characterized in that: A hydraulic cylinder (9) is fixedly mounted on the upper end of the frame of the mold base (1); an output end of the hydraulic cylinder (9) is fixedly connected to the mold cover (3); and the mold core (11) is in contact with the exhaust pipe (5).

3. The device for reducing casting cracks of aluminum alloy wheel hub according to claim 1, characterized in that: Two model plates (12) symmetrically distributed front and back are inserted into the upper end of the mold plate (10), the side edges of the model plates (12) are in contact with the mold box (2), and the upper ends of the model plates (12) are in contact with the mold core (11).

4. The device for reducing casting cracks of aluminum alloy wheel hub according to claim 1, characterized in that: The auxiliary limiting mechanism (6) comprises a limiting seat (61), a limiting seat (61) is arranged on the upper part of the outer side of the mold box (2), the limiting seat (61) penetrates the mold box (2) and is slidably connected to the mold box (2), a guide rod (62) is fixedly connected to the side of the limiting seat (61) away from the mold box (2), the guide rod (62) penetrates the mold cover (3) and is slidably connected to the mold cover (3), a handle (63) is fixedly connected to one end of the guide rod (62) away from the mold box (2), a spring (64) is arranged on the outer side of the guide rod (62), one end of the spring (64) is fixedly connected to the limiting seat (61), and the other end of the spring (64) is fixedly connected to the mold cover (3).

5. The device for reducing casting cracks of aluminum alloy wheel hub according to claim 1, characterized in that: The quick-release mechanism (7) comprises a fixed tube (71), the interior of the mold box (2) on the right side of the mold seat (1) is fixedly connected to the fixed tube (71), the interior of the fixed tube (71) is slidably connected to a T-shaped frame (72), the upper end of the T-shaped frame (72) is fixedly connected to a heat insulation seat (74), the lower left end of the heat insulation seat (74) is fixedly connected to a limit rod (75), a second spring (73) is arranged on the outer side of the T-shaped frame (72), and the exhaust pipe (5) is in contact with the fixed tube (71).

6. The device for reducing casting cracks of aluminum alloy wheel hub according to claim 5, characterized in that: One end of the second spring (73) is fixedly connected to the T-shaped frame (72), the other end of the second spring (73) is fixedly connected to the fixed pipe (71), the lower end of the heat insulation seat (74) is in contact with both the fixed pipe (71) and the exhaust pipe (5), the limiting rod (75) is slidably connected to the exhaust pipe (5), and the limiting rod (75) is slidably connected to the mold box (2).

7. The device for reducing casting cracks of aluminum alloy wheel hub according to claim 1, characterized in that: The quick connection mechanism (8) comprises a connection cover (81), the upper end of the casting tube (4) is slidably connected to the connection cover (81), the interior of the casting tube (4) is fixedly connected to two guide pins (82) symmetrically distributed on the left and right, the outer sides of the guide pins (82) are slidably connected to arc strips (83), the outer sides of the guide pins (82) are provided with springs three (84), one end of the spring three (84) is fixedly connected to the casting tube (4), the other end of the spring three (84) is fixedly connected to the arc strip (83), the arc strip (83) is slidably connected to the casting tube (4), and the arc surface of the arc strip (83) is slidably connected to the through hole of the connection cover (81).

8. The method for using the device for reducing casting cracks of aluminum alloy wheel hub according to any one of claims 1 to 7, characterized in that: The steps include: Step 1: Thicken the wall thickness of the front rim near the R angle by 1-2mm to reduce the maximum plastic deformation, reduce the stress concentration during plastic deformation, reduce cracking defects, increase the R angle of the spoke root to 5-10°, reduce stress concentration, and reduce R angle crack defects; Step 2, putting the heated and molten metal liquid into the interior of the die-casting machine. When the connecting cover (81) is needed, it is only necessary to sleeve the connecting cover (81) on the top of the casting tube (4) and press it downward with force. During the pressing process, the connecting cover (81) pushes the arc bar (83) into the interior of the casting tube (4) and compresses the spring three (84). When the connecting cover (81) and the casting tube (4) are fitted, the spring three (84) is reset. The spring three (84) can drive the arc bar (83) to slide into the through hole on the connecting cover (81) through elastic force to limit the connecting cover (81), so that the connecting cover (81) can be more easily connected. Then, casting is performed into the interior of the casting tube (4) through the connecting cover (81). During the casting process, the gas inside the mold box (2) is discharged through the exhaust pipe (5). When the liquid level inside the exhaust pipe (5) reaches a certain height, the casting is completed. Step 3: After waiting for the workpiece inside the mold box (2) to cool down, pull the handle (63), and the handle (63) drives the limit seat (61) to move through the guide rod (62), and compresses the spring 1 (64). When the limit seat (61) is separated from the mold box (2), start the hydraulic cylinder (9), and the hydraulic cylinder (9) drives the mold cover (3) to move upward; when the mold core (11) inside the mold cover (3) is separated from the mold box (2), pull the heat insulation seat (74) upward, and the heat insulation seat (74) drives the limit rod (75) to move, and compresses the spring 2 (73). When the limit rod (75) is separated from the exhaust pipe (5), the exhaust pipe (5) can be removed from the mold box (2); Step 4: Flip the mold box (2) to the position where the workpiece is separated, so that the workpiece can be easily demoulded. During the demoulding process, the R corners of the spoke roots on the mold plate (10) are thickened, which can effectively prevent cracks from occurring on the wheel hub. Step 5. When the wheel hub cools down to below 100℃, you can put the wheel hub into 40-50℃ warm water for cooling. After cooling, perform high-temperature annealing at a water temperature of 80-85℃, which can effectively prevent cracks in the wheel hub.

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