Ejection device for aluminum alloy hub forging hydraulic press

Abstract

The invention relates to the technical field of aluminum alloy hub forging, in particular to an ejection device for an aluminum alloy hub forging hydraulic press, which comprises an upper die, a lower die and a lifting device. The end, away from the hydraulic telescopic rod, of the control assembly is rotationally provided with a second supporting assembly, the control assembly controls rotation of the second supporting assembly through lifting of the fixing cylinder, and the end, away from the control assembly, of the second supporting assembly is provided with a rolling ball capable of rotating in one direction. And a first supporting assembly is further arranged at the end, away from the control assembly, of the second supporting assembly, one end of the first supporting assembly is rotationally connected with the second supporting assembly, the other end of the first supporting assembly is slidably connected with the bottom end of the telescopic groove, and supporting, fixing and jacking of the hub are achieved through cooperation of the first supporting assembly and the second supporting assembly.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy wheel hub forging, in particular to an ejection device used for an aluminum alloy wheel hub forging hydraulic press. Background Art

[0002] Aluminum alloy wheel forging hydraulic press is a kind of equipment specially used for producing aluminum alloy wheels. It mainly forges aluminum alloy materials by hydraulic pressure. It is usually used for the production of wheels for vehicles such as automobiles and motorcycles to ensure the high strength, lightness and durability of the wheels. During the forging process, the short bar is heated and placed in the corresponding mold, and then pressed by the rotary forging press, the initial forging press, and the final forging press. Finally, the forging process is completed by trimming and expanding the hole.

[0003] After searching, it was found that the lower ejector device suitable for an aluminum alloy wheel forging hydraulic press disclosed in publication number CN214920197U includes a lower ejector cylinder installed at the bottom of a lower cross beam, the upper end of the lower ejector cylinder is connected to a transition rod through a connecting sleeve, a ejector rod is installed at the upper end of the transition rod, a guide sleeve is installed on the lower cross beam, the ejector rod passes through the guide sleeve and a pad installed on the lower cross beam, and the diameter of the transition rod is larger than the diameter of the ejector rod.

[0004] The above patent still has some shortcomings in actual use. When the forging hydraulic press is lifted up after the downward pressure is completed, either the upper die and the wheel hub are easily fitted with the upper die after being pressed, which will cause the wheel hub and the upper die to fit together during the lifting stage of the upper die. The robot needs to take a downward pulling action to complete the demoulding. This process is likely to cause damage to the wheel hub and affect the transmission efficiency of subsequent processes; or the wheel hub and the lower die fit together, and the robot will also take an upward pulling action to achieve demoulding. In summary, when the forging hydraulic press realizes the forging pressure on the wheel hub, there are procedural redundancy and threats to the appearance of the wheel hub in the demoulding stage.

[0005] Based on this, the present invention discloses an ejection device for an aluminum alloy wheel hub forging hydraulic press. Summary of the invention

[0006] In order to solve the problems raised in the background technology, the purpose of the present invention is to provide an ejection device for an aluminum alloy wheel hub forging hydraulic press, which drives the rack to move up and down through the lifting and lowering of the fixed cylinder, and then drives the support plate and the support rod to drive the ball to move up and down, ensuring that the ball can effectively slide on the inner wall and gradually fit, thereby stabilizing the position of the wheel hub and preventing shaking during the forging process; secondly, the cooperation of the rack with the transmission gear and the driving gear can adjust the position of the ball so that it gradually fits with the inner wall during the descent process, ensuring the stability of the fixed cylinder during the rising and falling process, and being able to ensure During the entire forging process, the wheel hub will not have unnecessary contact or friction with the upper or lower die, thereby reducing mold damage and improving demolding efficiency; then, in conjunction with the one-way rotating component, the ball is restricted to rotate only when the fixed cylinder descends, and cannot rotate in the opposite direction when it rises, ensuring that the ball can smoothly fit and roll to the inner wall when it descends, and restricting the rotation of the ball when it rises to provide a top force for demolding the wheel hub; finally, combined with the stable triangular structure of the support rod, support plate and ball, the support rod is slidably connected to the slide groove through the roller, ensuring that the movement trajectories of the support plate and the support rod are coordinated and stably supported, while the ball is supported.

[0007] To achieve the above-mentioned object, the present invention provides an ejection device for an aluminum alloy wheel hub forging hydraulic press, which comprises a control frame, a forging hydraulic press body is arranged on the control frame, an upper die is arranged below the forging hydraulic press body, a lower control console is arranged on the control frame directly below the upper die, a telescopic slot is opened in the lower control console, a lifting device is arranged in the telescopic slot, a lower die matched with the upper die is arranged on the lifting device, a forging to be forged is arranged on the lower die, the lifting device comprises a fixed cylinder, and a hydraulic telescopic rod is arranged in the fixed cylinder; Preferably, a plurality of control components are evenly arranged on the hydraulic telescopic rod around the center of a circle, a second support component is rotatably arranged on one end of the control component away from the hydraulic telescopic rod, the control component controls the rotation of the second support component by lifting and lowering the fixed cylinder, a rolling ball that can only rotate in one direction is arranged on one end of the second support component away from the control component; a first support component is also arranged on one end of the second support component away from the control component, one end of the first support component is rotatably connected to the second support component, and the other end is slidably connected to the bottom end of the telescopic slot, wherein: In the initial state, the fixed cylinder rises, the sleeve is mounted on the lower mold, and the fixed cylinder rises, driving the second supporting assembly and the first supporting assembly to lift up one end away from the fixed cylinder through the control assembly; In the working state, the fixed cylinder descends and drives the second support assembly and the first support assembly to descend away from one end of the fixed cylinder through the control assembly, and the rolling ball rolls and abuts against the inner wall; In the demoulding state, the fixed cylinder rises and drives the second support assembly and the first support assembly to be lifted away from one end of the fixed cylinder through the control assembly, and the ball drives the lifting and separation from the lower mold through friction with the inner wall.

[0008] As a further improvement of the technical solution, the lifting device also includes a mounting ring, and the mounting ring is fixedly connected to the fixing tube.

[0009] As a further improvement of the present technical solution, the control component includes a rack and a mounting frame, the rack is fixedly connected to the mounting ring, the mounting frame is fixedly connected to the hydraulic telescopic rod, the rack is meshed with a transmission gear, the transmission gear is rotatably connected to the mounting frame, the side of the transmission gear away from the rack is meshed with a driving gear, the driving gear is fixedly connected to a first rotating rod, and the first rotating rod is rotatably connected to the mounting frame.

[0010] As a further improvement of the present technical solution, the second supporting assembly includes a supporting plate, one end of the supporting plate is fixedly connected to the first rotating rod, and the other end is rotatably connected to the second rotating rod, a rolling ball is fixedly connected to the second rotating rod, and a one-way rotating assembly is also provided on the second rotating rod for limiting the rolling ball to rotate only during the descent of the fixed cylinder.

[0011] Preferably, the one-way rotating assembly includes a ratchet, which is fixedly connected to the second rotating rod, the ratchet is meshed with a pawl, the pawl is rotatably connected to a screw, the screw is fixedly connected to a mounting plate, the mounting plate is fixedly connected to the support plate, and the pawl is also provided with a spring for causing the pawl to always fit with the ratchet, one end of the spring is fixedly connected to the pawl, and the other end is fixedly linked to the mounting plate.

[0012] As a further improvement of the present technical solution, the first supporting assembly includes a supporting rod rotatably connected to both sides of the second rotating rod, one end of the supporting rod away from the second rotating rod is rotatably connected to the base plate, rollers are rotatably connected to both ends of the base plate, a sliding groove parallel to the longitudinal direction of the telescopic groove is opened on the bottom end of the telescopic groove, and the roller is slidably connected in the sliding groove.

[0013] Preferably, when the fixed cylinder descends to the initial position, the rack drives the driving gear to rotate, so that the support plate is in a horizontal position, and at this time the tangent of the ball fits against the inner wall, and the roller fits against the inner wall of one end of the slide groove adjacent to the fixed cylinder.

[0014] As a further improvement of the technical solution, when the fixed cylinder rises, the rack drives the driving gear to rotate, causing the ball to slide on the inner wall through the support plate. When the fixed cylinder rises to the top, the ball is separated from the inner wall.

[0015] Preferably, the rolling ball is made of a material that is resistant to high temperatures, has a high friction coefficient and is elastic.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the ejection device of the aluminum alloy wheel hub forging hydraulic press, the lifting and lowering of the fixed cylinder will drive the rack to move synchronously through the cooperation with the rack, which is conducive to driving the rotation of the transmission gear and the driving gear, thereby realizing the lifting and rotation of the second support assembly, so that the ball can flexibly adjust its position according to the working state of the forging hydraulic press, and achieve fit or separation with the inner wall to be forged; secondly, the transmission gear is meshed with the rack, and the driving gear is meshed with the other side of the transmission gear, so that the lifting and lowering of the rack can be converted into the reverse rotation of the driving gear, thereby driving the adaptive rotation of the second support assembly, so that the ball can roll in a predetermined direction during the lifting and lowering of the fixed cylinder and achieve good fit with the inner wall.

[0017] 2. In the ejection device of the aluminum alloy wheel forging hydraulic press, a one-way rotating component is provided, which limits the rotation direction of the ball, so that the ball can only roll in contact with the inner wall when the fixed cylinder is lowered, and cannot rotate in the opposite direction when the fixed cylinder is raised. Therefore, when the fixed cylinder is raised, the ball can be lifted up by the friction with the inner wall, which is convenient for demolding.

[0018] 3. In the ejection device of the aluminum alloy wheel forging hydraulic press, the support plate and the support rod are fixedly connected to the second rotating rod through the cooperation of the support plate and the support rod, and the support rod is rotatably connected to both sides of the second rotating rod, so that the support plate and the support rod can jointly form a stable triangular structure to support the rolling ball, thereby enhancing the stability of the rolling ball when it fits against the inner wall and preventing shaking during the forging process; secondly, the roller is slidably connected in the slide groove, so that the bottom plate can slide along the slide groove, which is convenient for the support rod to maintain the same movement as the intersection of the support plate (i.e., the rolling ball) during the lifting and lowering process of the fixed cylinder, thereby improving the flexibility and stability of the entire ejection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the lower mold of the present invention; Figure 3 The second schematic diagram of the structure of the lower mold of the present invention; Figure 4It is a structural cross-sectional view of the lower mold of the present invention; Figure 5 It is a structural schematic diagram of the lifting device of the present invention; Figure 6 is a schematic structural diagram of a first supporting assembly of the present invention; Figure 7 for Figure 6 A magnified view of the structure at center A; Figure 8 It is a state schematic diagram of the first supporting assembly of the present invention.

[0020] The meaning of each number in the figure is: 1. Control frame; 2. Forging hydraulic press body; 3. Upper die; 4. Lower control console; 5. Telescopic slot; 6. Lifting device; 7. Lower die; 8. Slide; 9. First support assembly; 10. Second support assembly; 11. Control assembly; 61. Fixed cylinder; 62. Hydraulic telescopic rod; 63. Mounting ring; 91. support rod; 92. bottom plate; 93. roller; 101, support plate; 102, rolling ball; 103, second rotating rod; 104, one-way rotating assembly; 1041, ratchet; 1042, pawl; 1043, screw; 1044, mounting plate; 1045, spring; 111. rack; 112. transmission gear; 113. driving gear; 114. first rotating rod; 115. mounting bracket. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the existing forging hydraulic press, the wheel hub is easy to fit with the upper die 3 or the lower die 7 during the demoulding stage, making it difficult to demould.

[0023] To this end, the present invention provides an ejector device for an aluminum alloy wheel forging hydraulic press, see Figure 1-Figure 5As shown, it includes a control frame 1, on which a forging hydraulic press body 2 is arranged, below which an upper die 3 is arranged, on which a lower control console 4 is arranged directly below the upper die 3, in which a telescopic slot 5 is provided, in which a lifting device 6 is provided, on which a lower die 7 adapted to the upper die 3 is provided, on which a material 12 to be forged is provided, and the lifting device 6 includes a fixed cylinder 61, in which a hydraulic telescopic rod 62 is provided.

[0024] For details, see Figure 4-Figure 6 As shown, a plurality of control components 11 are evenly arranged around the center of the hydraulic telescopic rod 62, and a second support component 10 is rotatably arranged at one end of the control component 11 away from the hydraulic telescopic rod 62. The control component 11 controls the rotation of the second support component 10 by lifting and lowering the fixed cylinder 61, and a rolling ball 102 that can only rotate in one direction is arranged at one end of the second support component 10 away from the control component 11; a first support component 9 is also arranged at one end of the second support component 10 away from the control component 11, and one end of the first support component 9 is rotatably connected to the second support component 10, and the other end is slidably connected to the bottom end of the telescopic slot 5; In the initial state, the fixed cylinder 61 rises, 12 is sleeved on the lower mold 7, and the fixed cylinder 61 rises and drives the second support assembly 10 and the first support assembly 9 to lift up away from the end of the fixed cylinder 61 through the control assembly 11; In the working state, the fixed cylinder 61 descends and drives the second support assembly 10 and the first support assembly 9 to descend away from one end of the fixed cylinder 61 through the control assembly 11, and the ball 102 rolls and presses against the inner wall of 12; In the demoulding state, the fixed cylinder 61 rises and drives the second support assembly 10 and the first support assembly 9 to lift up one end away from the fixed cylinder 61 through the control assembly 11, and the rolling ball 102 drives 12 to lift up and separate from the lower mold 7 through friction with the inner wall of 12.

[0025] It can be seen from this that the combination Figure 8 As shown, a is a vertical line of the inner wall of 12, and b is a tangential vertical line of the ball 102. After the fixed cylinder 61 is raised from the initial state, the control component 11 drives the second support component 10 to lift up the end away from the fixed cylinder 61, and the ball 102 moves from position a to position b, so as to leave space for the insertion of 12; then 12 is placed on the lower mold 7, and then the fixed cylinder 61 begins to descend and enters the working state. As the fixed cylinder 61 descends, the ball 102 moves from position a to position b. Figure 8 It can also be seen that the ball 102 will gradually move from position b to position a. During this process, the ball 102 will gradually fit the inner wall of 12, and then gradually make the ball 102 close to the inner wall of 12 by rolling. Since the ball 102 can only rotate in one direction, that is, the ball 102 can only rotate during the process of the fixed cylinder 61 descending, that is, during the process of the ball 102 gradually fitting with the inner wall of 12, so that the ball 102 gradually presses against the inner wall of 12, and a plurality of control components 11 are evenly arranged around the center of the fixed cylinder 61, so that the inner wall of 12 is fixed and stabilized from all sides, and the shaking of 12 during the pressing process of the upper die 3 is prevented from causing local uneven stress and cracks inside 12. Therefore, the process of the fixed cylinder 61 descending drives the ball 102 to fix 12, so that the upper die 3 and the lower die 7 can press 12 downward by forging, and it can also prevent the upper die 3 from causing the top surface of 12 to fit with the upper die 3 after pressing downward, so that 12 can always be ensured to be firmly fixed on the lower die 7, and then only how to separate 12 from the lower die 7 needs to be considered; After pressing, the fixed cylinder 61 needs to be lifted up to facilitate the subsequent robot to take away 12 for subsequent operations. The lifting of the fixed cylinder 61 drives the ball 102 from position a to position b through the control component 11. However, as mentioned above, the ball 102 can only rotate in one direction. When the ball 102 moves from position a to position b, the ball 102 will have a relative rotation trend with the inner wall of 12, but the relative rotation direction of the ball 102 with the inner wall of 12 is opposite to that when the ball 102 moves from b to a. However, at this time, the ball 102 cannot rotate. Therefore, several groups of balls 102 can use this friction force to lift 12 together, so as to facilitate the demolding of 12 from the lower mold 7.

[0026] The specific structure of the present invention is disclosed below. Figure 4-Figure 6 As shown, the lifting device 6 also includes a mounting ring 63, which is fixedly connected to the fixed cylinder 61, and the control component 11 includes a rack 111 and a mounting frame 115, the rack 111 is fixedly connected to the mounting ring 63, the mounting frame 115 is fixedly connected to the hydraulic telescopic rod 62, the rack 111 is meshed with a transmission gear 112, the transmission gear 112 is rotatably connected to the mounting frame 115, and the side of the transmission gear 112 away from the rack 111 is meshed with a driving gear 113, the driving gear 113 is fixedly connected to the first rotating rod 114, and the first rotating rod 114 is rotatably connected to the mounting frame 115; Figure 5It can also be seen that the transmission gear 112 meshing with the rack 111 will be driven to rotate during its upward or downward movement. However, considering that the upward movement of the rack 111 and the upward movement of the fixed cylinder 61 are in the same direction, but the ball 102 needs to move up with the rack 111 during its upward movement, an additional driving gear 113 meshing with the other side of the transmission gear 112 is added to realize the change of rotation direction, so that the ball 102 can move up or down following the rhythm of the rack 111; and by controlling the length of the rack 111 and coordinating the radius or number of teeth of the transmission gear 112 and the driving gear 113, it is convenient to adjust the moving position of the ball 102, so that it can more accurately ensure that the ball 102 is tightly fitted to the inner wall of 12 when the fixed cylinder 61 returns to its initial position.

[0027] Secondly, see Figure 6-Figure 7 As shown, the second support assembly 10 includes a support plate 101, one end of the support plate 101 is fixedly connected to the first rotating rod 114, and the other end is rotatably connected to the second rotating rod 103, and the second rotating rod 103 is fixedly connected to the ball 102. The second rotating rod 103 is also provided with a one-way rotating assembly 104, which is used to limit the ball 102 to rotate only during the descent of the fixed cylinder 61.

[0028] Moreover, by Figure 7 It can be seen that the one-way rotating assembly 104 includes a ratchet 1041, which is fixedly connected to the second rotating rod 103, the ratchet 1041 is meshed with a pawl 1042, the pawl 1042 is rotatably connected to a screw 1043, the screw 1043 is fixedly connected to a mounting plate 1044, the mounting plate 1044 is fixedly connected to the support plate 101, and the pawl 1042 is also provided with a spring 1045 for causing the pawl 1042 to always fit with the ratchet 1041. One end of the spring 1045 is fixedly connected to the pawl 1042, and the other end is fixedly connected to the mounting plate 1044; it can be seen that when the fixed cylinder 61 descends and drives the driving gear 113 to rotate through the rack 111, the ball 102 is driven to gradually fit with the inner wall of 12 through the support plate 101, and then the ball 102 will roll a short distance on the inner wall of 12 until it is completely and tightly fitted with the inner wall of 12. In this process, the ratchet 1041 and the pawl 1042 are connected by the following steps: Figure 7The setting shown in the figure realizes that the rotation direction of ball 102 is opposite to that of driving gear 113. However, when ball 102 wants to rotate in the opposite direction, that is, when support plate 101 drives ball 102 to rise as mentioned above, ball 102 cannot rotate. Therefore, the entire one-way rotating component 104 can adapt to the one-way rotation requirement of the present invention for ball 102. Ball 102 cannot rotate during the upward movement, but there is a rolling distance with the inner wall of 12 during the downward movement. Therefore, when ball 102 moves upward, it will jointly drive 12 to lift up. When 12 is lifted up, ball 102 gradually disengages from 12, making it easier for the subsequent robot to take it away from the lower mold 7.

[0029] For further information, see Figure 4 and Figure 6 As shown, the first support assembly 9 includes a support rod 91 rotatably connected to both sides of the second rotating rod 103, one end of the support rod 91 away from the second rotating rod 103 is rotatably connected to the bottom plate 92, and rollers 93 are rotatably connected to both ends of the bottom plate 92. A slide groove 8 parallel to the longitudinal direction of the telescopic groove 5 is opened on the bottom end of the telescopic groove 5, and the roller 93 is slidably connected in the slide groove 8. The bottom plate 92 is slidably connected in the slide groove 8 through the roller 93. This arrangement takes into account that the length of the support rod 91 is different from that of the support plate 101, and the rotation fulcrum is different, so they should be kept at the common intersection, that is, the rolling ball 102. In order to ensure consistent movement, it is necessary to allow the end of the support rod 91 away from the ball 102 to slide along the longitudinal direction of the telescopic groove 5, and the setting of the roller 93 can reduce the friction during the sliding process, while also satisfying the above-mentioned requirement of maintaining consistency in the movement of the ball 102 at the intersection of the support rod 91 and the support plate 101. In addition, the support rod 91 is provided here to further stabilize the support plate 101. Combined with the support plate 101 and the hydraulic telescopic rod 62, a triangular stable structure is formed at the ball 102, which can ensure the stability of the ball 102 when it is in contact with the inner wall 12.

[0030] Furthermore, by Figure 6 and Figure 8 It can be seen that when the fixed cylinder 61 descends to the initial position, the rack 111 drives the driving gear 113 to rotate, so that the support plate 101 is in a horizontal position, and at this time, the tangent of the ball 102 is in contact with the inner wall of 12, and the roller 93 is in contact with the inner wall of the end of the slide groove 8 adjacent to the fixed cylinder 61; then, when the fixed cylinder 61 is rising, the rack 111 drives the driving gear 113 to rotate, causing the ball 102 to slide on the inner wall of 12 through the support plate 101. When the fixed cylinder 61 rises to the top, the ball 102 is separated from the inner wall of 12, and the roller 93 is in contact with the inner wall of the slide groove 8 adjacent to the fixed cylinder 61. Figure 8It can be seen that when the fixed cylinder 61 is in the initial position, the support plate 101 drives the ball 102 to roll a distance in contact with the inner wall 12 and then is in a horizontal position, and the end of the support rod 91 away from the ball 102 also happens to be pressed against the inner wall of the end of the slide groove 8 through the bottom plate 92 and the roller 93, so that the support rod 91, the support plate 101 and the fixed cylinder 61 can form a stable triangular structure, and when the fixed cylinder 61 is raised or lowered, the support rod 91, the support plate 101 and the fixed cylinder 61 can form a stable triangular structure. Figure 8 The dotted line portion can clearly show the movement trajectory of the entire support plate 101 and the support rod 91.

[0031] In addition, the ball 102 is made of a high-temperature resistant, high-friction and elastic material, such as silicon nitride, which can withstand high temperatures up to +1400°C, has a high friction coefficient, and has strong elasticity and rigidity; the material selection of the ball 102 enables it to withstand high-temperature forging environments, while having a high friction coefficient and elasticity, which is conducive to the good fit between the ball 102 and the inner wall of 12, and can provide sufficient friction to lift 12 during demolding.

[0032] To sum up, by raising and lowering the fixed cylinder 61, the rack 111 is driven to rise and fall, and then the support plate 101 and the support rod 91 are linked to drive the ball 102 to be raised and lowered, so that when 12 is inserted into the lower die 7, the fixed cylinder 61 descends and drives several groups of balls 102 to roll and fit against the inner wall of 12, thereby stabilizing 12. Then, when the upper die 3 is pressed down and lifted, the fixed cylinder 61 is lifted, and the support plate 101 and the support rod 91 are lifted up by the rack 111, and the one-way rotating component 104 restricts the ball 102, so that the support plate 101 drives the ball 102 to lift 12, thereby realizing the demolding of 12, thereby effectively solving the problem that the wheel hub of the existing forging hydraulic press is easy to fit with the upper die 3 or the lower die 7 during the demolding stage and is not easy to demold.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An ejection device for an aluminum alloy wheel hub forging hydraulic press, comprising a control frame (1), a forging hydraulic press body (2) being arranged on the control frame (1), an upper die (3) being arranged below the forging hydraulic press body (2), a lower control console (4) being arranged on the control frame (1) and located directly below the upper die (3), a telescopic slot (5) being provided in the lower control console (4), a lifting device (6) being arranged in the telescopic slot (5), a lower die (7) being arranged on the lifting device (6) and matching with the upper die (3), a material (12) to be forged being arranged on the lower die (7), the lifting device (6) comprising a fixed cylinder (61), a hydraulic telescopic rod (62) being arranged in the fixed cylinder (61), and characterized in that: A plurality of control components (11) are evenly arranged on the hydraulic telescopic rod (62) around the center of a circle. A second support component (10) is rotatably arranged at one end of the control component (11) away from the hydraulic telescopic rod (62). The control component (11) controls the rotation of the second support component (10) by lifting and lowering the fixed cylinder (61). A rolling ball (102) that can only rotate in one direction is arranged at one end of the second support component (10) away from the control component (11). A first support component (9) is also arranged at one end of the second support component (10) away from the control component (11). One end of the first support component (9) is rotatably connected to the second support component (10), and the other end is slidably connected to the bottom end of the telescopic slot (5), wherein: In the initial state, the fixed cylinder (61) rises, the (12) is sleeved on the lower mold (7), and the fixed cylinder (61) rises, driving the second support assembly (10) and the first support assembly (9) to be lifted away from one end of the fixed cylinder (61) through the control assembly (11); In the working state, the fixed cylinder (61) descends and drives the second support assembly (10) and the first support assembly (9) to descend away from one end of the fixed cylinder (61) through the control assembly (11), and the rolling ball (102) rolls and abuts against the inner wall of the (12); In the demoulding state, the fixed cylinder (61) rises and drives the second support assembly (10) and the first support assembly (9) to be lifted away from one end of the fixed cylinder (61) through the control assembly (11), and the rolling ball (102) drives the (12) to be lifted and separated from the lower mold (7) by friction with the inner wall of the (12).

2. The ejector device for an aluminum alloy wheel forging hydraulic press according to claim 1, characterized in that: The lifting device (6) further comprises a mounting ring (63), wherein the mounting ring (63) is fixedly connected to the fixing cylinder (61).

3. The ejector device for an aluminum alloy wheel forging hydraulic press according to claim 2, characterized in that: The control assembly (11) comprises a rack (111) and a mounting frame (115); the rack (111) is fixedly connected to the mounting ring (63); the mounting frame (115) is fixedly connected to the hydraulic telescopic rod (62); the rack (111) is meshed with a transmission gear (112); the transmission gear (112) is rotatably connected to the mounting frame (115); a driving gear (113) is meshed on a side of the transmission gear (112) away from the rack (111); the driving gear (113) is fixedly connected to a first rotating rod (114); and the first rotating rod (114) is rotatably connected to the mounting frame (115).

4. The ejector device for an aluminum alloy wheel forging hydraulic press according to claim 3, characterized in that: The second support assembly (10) comprises a support plate (101), one end of the support plate (101) being fixedly connected to the first rotating rod (114), and the other end of the support plate being rotatably connected to the second rotating rod (103), the second rotating rod (103) being fixedly connected to a rolling ball (102), and the second rotating rod (103) being further provided with a one-way rotating assembly (104) for limiting the rolling ball (102) to rotate only during the process of the fixed cylinder (61) descending.

5. The ejector device for the aluminum alloy wheel forging hydraulic press according to claim 4, characterized in that: The one-way rotating assembly (104) comprises a ratchet (1041), wherein the ratchet (1041) is fixedly connected to the second rotating rod (103), the ratchet (1041) is meshed with a pawl (1042), the pawl (1042) is rotatably connected to a screw rod (1043), the screw rod (1043) is fixedly connected to a mounting plate (1044), the mounting plate (1044) is fixedly connected to the support plate (101), and the pawl (1042) is also provided with a spring (1045) for causing the pawl (1042) to always fit with the ratchet (1041), one end of the spring (1045) is fixedly connected to the pawl (1042), and the other end is fixedly linked to the mounting plate (1044).

6. The ejector device for the aluminum alloy wheel forging hydraulic press according to claim 5, characterized in that: The first support assembly (9) comprises a support rod (91) rotatably connected to two sides of the second rotating rod (103); one end of the support rod (91) away from the second rotating rod (103) is rotatably connected to a bottom plate (92); rollers (93) are rotatably connected to both ends of the bottom plate (92); a slide groove (8) parallel to the longitudinal direction of the telescopic groove (5) is provided at the bottom end of the telescopic groove (5); and the roller (93) is slidably connected in the slide groove (8).

7. The ejector device for an aluminum alloy wheel forging hydraulic press according to claim 6, characterized in that: When the fixed cylinder (61) descends to the initial position, the rack (111) drives the driving gear (113) to rotate, so that the support plate (101) is in a horizontal position, and at this time, the tangent direction of the rolling ball (102) is in contact with the inner wall of (12), and the roller (93) is in contact with the inner wall of one end of the sliding groove (8) adjacent to the fixed cylinder (61).

8. The ejector device for the aluminum alloy wheel forging hydraulic press according to claim 7, characterized in that: When the fixed cylinder (61) is rising, the rack (111) drives the driving gear (113) to rotate, causing the rolling ball (102) to slide on the inner wall of the (12) through the support plate (101); when the fixed cylinder (61) rises to the top, the rolling ball (102) is separated from the inner wall of the (12).

9. The ejector device for an aluminum alloy wheel forging hydraulic press according to claim 8, characterized in that: The rolling ball (102) is made of a material that is resistant to high temperatures, has a high friction coefficient and is elastic.

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