Multi-station air cooling device for metal castings

Abstract

The utility model relates to metal casting air cooling technical field, concretely relates to a kind of metal casting multi-station air cooling device. Including rack, carousel and the annular distribution of several annular distribution's bearing mechanism installed on carousel, bearing mechanism is made of bearing frame, transmission shaft and deflector plate, transmission shaft is equipped with universal shaft, carousel center place is vertically fixed and is equipped with gas guide column, the top of its column annularly is equipped with several arc-shaped jet head matched with bearing mechanism one-to-one, rack annularly is fixed and is equipped with slide rail, slide rail is divided into horizontal station, inner lateral station and outer lateral station, rack is equipped with rotary drive mechanism, rotary drive mechanism is all transmission connection with several transmission shafts. Through the height difference design of inner rail and outer rail, deflector plate can drive casting to realize accurate inclination in different stations, combined with casting rotation, completely eliminate cooling dead angle, can complete multi-surface cooling in one circulation process, meet the efficient demand of batch production.

Description

Technical Field

[0001] This utility model relates to the field of air cooling technology for metal castings, specifically to a multi-station air cooling device for metal castings. Background Technology

[0002] In the field of metal processing, disc-shaped and ring-shaped metal castings (such as metal steering wheels, metal bearing sleeves, wheel hubs, etc.) present unique challenges in their cooling process due to their annular or disc-shaped structure. The central hole area, inner sidewalls, outer sidewalls, and front and back planes of these castings all require uniform cooling; otherwise, excessive local temperature differences can easily lead to deformation or stress concentration, affecting product precision and service life. Traditional single-station equipment has low cooling efficiency and cannot meet the needs of mass production. Although multi-station equipment can achieve continuous operation, most of them use fixed-angle air jets, which can only cool a single plane or side of the casting. This results in insufficient cooling of areas such as the periphery of the central hole and the inner wall, forming cooling dead zones. Some equipment attempts to improve the cooling effect by manually adjusting the angle of the casting, but the operation is cumbersome and the angle control accuracy is low, which can easily cause the casting positioning deviation and further aggravate the problem of uneven cooling.

[0003] In addition, disc and ring-shaped castings need to be cooled while rotating to ensure uniform heating of all parts. However, the transmission structure of existing equipment is difficult to achieve the coordination of revolution and rotation, often resulting in jamming or unstable speed, which affects the cooling quality. Utility Model Content

[0004] Therefore, it is necessary to provide a multi-station air-cooling device for metal castings to address the existing technical problems.

[0005] To solve the problems of the existing technology, the technical solution adopted by this utility model is as follows: This utility model provides a multi-station air-cooling device for metal castings, including a frame, a turntable, and several ring-shaped support mechanisms mounted on the turntable. Each support mechanism consists of a support frame, a drive shaft, and a deflection plate. The support frame is fixedly connected to the vertically arranged drive shaft. The deflection plate is located below the support frame. A universal joint is provided on the drive shaft. The turntable is connected to the support frame via a connecting frame. A guide column is vertically fixed at the center of the turntable. Several arc-shaped jet nozzles, each matching one of the support mechanisms, are arranged in a ring at the top of the guide column. A slide rail is fixedly arranged in a ring on the frame. The slide rail is divided into horizontal, inner, and outer work positions. The deflection plate is arranged radially along the turntable. The center of the deflection plate is rotatably connected to the drive shaft. The tilt angle of the deflection plate at different work positions changes synchronously with the height of the slide rail. A rotary drive mechanism is provided on the frame, and the rotary drive mechanism is connected to several drive shafts.

[0006] To address the issue that a single slide rail cannot independently control the inclination angles of the inner and outer sides, which can easily lead to the cooling airflow missing its target when the center of gravity of the casting shifts: the slide rail is divided into an inner rail and an outer rail. The top of the slide rail is composed of horizontal steps, high steps, low steps, and inclined steps of different heights. The height of the horizontal steps is between that of the high steps and the low steps, and the inclined steps are used to connect two adjacent horizontal steps, high steps, or low steps of different heights.

[0007] To avoid jamming during slide rail switching, which could cause casting vibration and positioning misalignment: the horizontal position of the slide rail consists of an inner rail and an outer rail, both located at horizontal steps; the inner side position of the slide rail consists of an inner rail at a lower step and an outer rail at a higher step; and the outer side position of the slide rail consists of an inner rail at a higher step and an outer rail at a lower step. The inclined steps at each connection point of the inner and outer rails are set in opposite directions.

[0008] To address the issue of adapting the drive shaft angle when the deflector plate is tilted, the drive shaft consists of a first shaft and a second shaft. The first shaft is fixedly connected to the support frame, and the second shaft, located below the first shaft, is connected to the bottom of the first shaft via a universal joint. A collar is rotatably connected to the second shaft, with limit rings at both the top and bottom of the collar. The collar is connected to the connecting frame.

[0009] To achieve precise matching between the deflection plate and the slide rail, and to prevent the deflection plate from disconnecting from the slide rail or causing mechanical jamming when deflecting, sliding grooves are provided on both sides of the deflection plate along its length. Each sliding groove is equipped with a sliding seat, and a transmission rod is hinged under the sliding seat. A sliding ball head is fixedly installed at the bottom of the transmission rod, and the two sliding ball heads are located in the grooves of the inner and outer rails, respectively.

[0010] Preferably, a driven gear is fixedly installed on the lower half of the second rotating shaft. The rotary drive mechanism includes a rotary driver, a drive gear, and a transmission ring. The transmission ring is rotatably mounted on the inner wall of the slide rail. The outer wall of the transmission ring is provided with outer ring teeth, and the inner wall of the transmission ring is provided with inner ring teeth. The output end of the rotary driver, which is fixedly mounted on the frame, is fixedly connected to the drive gear. The drive gear meshes with the transmission ring through the outer ring teeth, and the transmission ring meshes with several driven gears through the inner ring teeth.

[0011] To ensure the stable placement of the casting during the cooling process and to prevent the casting from shifting when deflected at a certain angle, the support frame is equipped with a central limiting head, a bottom supporting rod, and a lateral limiting rod. Several bottom supporting rods and lateral limiting rods are provided and distributed in a ring around the axis of the drive shaft. The central limiting head is located at the center of the support frame, and the height of the lateral limiting rod is higher than the height of the bottom supporting rod.

[0012] Preferably, the central limiting head is hollow, the top of the hollow limiting head is chamfered, and the outer wall of the hollow limiting head fits against the inner hole sidewall at the center of the metal casting.

[0013] The advantages of this utility model compared to the prior art are: 1. Through the height difference design between the inner and outer rails, the deflector plate can drive the casting to achieve precise tilting at different positions (inward tilting adapts to inner wall cooling, outward tilting adapts to outer wall cooling, and horizontal position adapts to front and back plane cooling). Combined with the casting's rotation, cooling dead zones are completely eliminated. For ring castings with complex curved surfaces such as wheel hubs, the angle can be adjusted to ensure that the jet head is always aimed at the area to be cooled, ensuring that the temperature difference of each part is controlled within the specified range, and significantly reducing the deformation rate.

[0014] 2. The turntable drives the ring-shaped bearing mechanism to revolve, realizing continuous air cooling operation in multiple stations. The switching between horizontal stations, inner stations and outer stations does not require manual intervention. In conjunction with the rotation of the casting, multi-faceted cooling can be completed in one transfer process, meeting the high-efficiency requirements of mass production.

[0015] 3. The ring-shaped bearing mechanism of the device is highly compatible with the shape of the disc and ring-shaped castings. The central limiting head can be precisely embedded into the central hole of the casting. Together with the ring-shaped bottom bearing rods and lateral limiting rods, it can stably clamp ring castings of different sizes and avoid cooling deviations caused by shaking during the cooling process. This solves the problem of insufficient cooling of the area around the central hole in traditional equipment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a multi-station air-cooling device for metal castings; Figure 2 A partial three-dimensional structural diagram of a multi-station air-cooling device for metal castings. Figure 1 ; Figure 3 A partial three-dimensional structural diagram of a multi-station air-cooling device for metal castings. Figure 2 ; Figure 4 This is a partial front view of a multi-station air-cooling device for metal castings; Figure 5 This is a three-dimensional structural diagram of the load-bearing mechanism in a multi-station air-cooling device for metal castings; Figure 6 This is a schematic diagram of a partial three-dimensional structure of the load-bearing mechanism in a multi-station air-cooling device for metal castings.

[0017] The numbers on the map are: 1. Frame; 2. Turntable; 3. Bearing mechanism; 4. Bearing frame; 5. Drive shaft; 6. Deflector plate; 7. Universal joint; 8. Connecting frame; 9. Air guide column; 10. Arc-shaped jet nozzle; 11. Slide rail; 12. Inner rail; 13. Outer rail; 14. Horizontal step; 15. High step; 16. Low step; 17. Inclined step; 18. First rotating shaft; 19. Second rotating shaft; 20. Collar; 21. Limiting ring; 22. Sliding groove; 23. Sliding seat; 24. Drive rod; 25. Sliding ball head; 26. Slide groove; 27. Driven gear; 28. Rotary actuator; 29. ​​Drive gear; 30. Drive ring; 31. Center limiting head; 32. Bottom bearing rod; 33. Lateral limiting rod. Detailed Implementation

[0018] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figures 1-6 The multi-station air-cooling device for metal castings shown includes a frame 1, a turntable 2, and several ring-shaped support mechanisms 3 mounted on the turntable 2. Each support mechanism 3 consists of a support frame 4, a drive shaft 5, and a deflection plate 6. The support frame 4 is fixedly connected to the vertically arranged drive shaft 5. The deflection plate 6 is located below the support frame 4. A universal joint 7 is provided on the drive shaft 5. The turntable 2 is connected to the support frame 4 via a connecting frame 8. A guide column 9 is vertically fixed at the center of the turntable 2. Several arc-shaped jet nozzles 10, each matching one of the support mechanisms 3, are arranged in a ring at the top of the guide column. A slide rail 11 is fixedly arranged in a ring on the frame 1. The slide rail 11 is divided into horizontal, inner, and outer work positions. The deflection plate 6 is arranged radially along the turntable 2. The center of the deflection plate 6 is rotatably connected to the drive shaft 5. The tilt angle of the deflection plate 6 at different work positions changes synchronously with the height of the slide rail 11. A rotary drive mechanism is provided on the frame 1, and the rotary drive mechanism is connected to the several drive shafts 5.

[0020] This device uses a turntable 2 to drive several ring-shaped bearing mechanisms 3 to revolve. When the bearing mechanism 3 is displaced, it works in conjunction with the three-position slide rail 11 to control the tilt angle of the metal casting. The arc-shaped jet nozzle 10 at the top of the air guide column 9 sprays high-speed airflow in a directional manner toward the corresponding bearing mechanism 3. This causes the deflection angle of the metal casting on the bearing mechanism 3 to change, and also causes the metal casting to rotate around the transmission shaft 5, thereby achieving a highly efficient and uniform cooling function.

[0021] The rotary table 2 revolves, driving the bearing mechanism 3 through horizontal / inner / outer workstations. The height of the slide rail 11 changes, driving the transmission shaft 5 to change its tilt angle via the deflection plate 6. The arc-shaped jet head 10 of the air guide column 9 always locks onto the metal casting and sprays out radial airflow, which can cover blind areas at multiple angles, quickly reduce the surface temperature of the casting while maintaining uniform cooling, enhance the heat dissipation effect of the core area, improve the cooling effect of the central hole area of ​​the metal casting, distribute residual stress evenly, and reduce the deformation rate of the metal casting during the cooling process.

[0022] like Figures 3-4 As shown, in order to solve the problem that a single slide rail 11 cannot independently control the inward and outward tilt angles, which easily leads to the cooling airflow missing the target when the center of gravity of the casting shifts: the slide rail 11 is divided into an inner rail 12 and an outer rail 13. The top of the slide rail 11 is composed of a horizontal step 14, a high step 15, a low step 16 and an inclined step 17 of different heights. The height of the horizontal step 14 is between the high step 15 and the low step 16. The inclined step 17 is used to connect two adjacent horizontal steps 14, high steps 15 or low steps 16 of different heights.

[0023] To achieve precise angle switching of the deflection plate 6 at different workstations, the slide rail 11 adopts a combination design of inner rail 12 and outer rail 13, and the top is composed of a horizontal step 14, a high step 15, a low step 16, and an inclined step 17. The height of the horizontal step 14 is between the high and low steps 16, and the inclined step 17 is used to connect steps of different heights to form a smooth transition. During operation, the sliding components on both sides of the deflector plate 6 move along the inner rail 12 and the outer rail 13, respectively. When the sliding components are at the horizontal step 14, the deflector plate 6 remains horizontal; when entering the high or low step 16, the deflector plate 6 tilts due to the height difference on both sides. The inclined step 17 ensures a smooth transition of the sliding components between different height steps, avoiding casting swaying or equipment impact caused by sudden angle changes. The stepped track design precisely controls the tilt angle of the deflector plate 6 to meet the cooling requirements of different workstations; the inclined step 17 achieves a smooth transition, reducing equipment wear, extending service life, and ensuring the stability of the casting during workstation switching. This design eliminates the need for an additional drive source and deflection angle detection device, reducing the complexity of the equipment and improving the reliability of long-term stable operation.

[0024] To avoid jamming during the switching of the slide rail 11, which could cause the casting to vibrate and lead to positioning deviation: the horizontal position of the slide rail 11 consists of an inner rail 12 and an outer rail 13, both located at the horizontal step 14; the inner side position of the slide rail 11 consists of an inner rail 12 located at the low step 16 and an outer rail 13 located at the high step 15; and the outer side position of the slide rail 11 consists of an inner rail 12 located at the high step 15 and an outer rail 13 located at the low step 16. The inclined steps 17 at each connection of the inner rail 12 and the outer rail 13 are set in opposite directions.

[0025] During operation, the height difference of the tracks at different stations drives the deflector plate 6 to tilt in specific directions: in the inward-facing station, the inner rail 12 is lower and the outer rail 13 is higher, causing the inner side of the deflector plate 6 to sink and the outer side to rise, tilting the casting inward to facilitate cooling of the inner wall of the casting by the air jet head; in the outward-facing station, the opposite occurs, with the casting tilting outward to facilitate cooling of the outer wall; the horizontal station ensures frontal cooling of the casting in a horizontal state. This results in smooth rotation. The casting posture changes smoothly and quickly, adapting to rapid air cooling operations for metal castings.

[0026] like Figure 5 As shown, in order to solve the problem of the angle adaptation of the drive shaft 5 when the deflection plate 6 is tilted, the drive shaft 5 is composed of a first rotating shaft 18 and a second rotating shaft 19. The first rotating shaft 18 is fixedly connected to the support frame 4. The second rotating shaft 19 located below the first rotating shaft 18 is connected to the bottom of the first rotating shaft 18 through a universal joint 7. A collar 20 is rotatably connected on the second rotating shaft 19. The collar 20 is provided with limit rings 21 at both the top and bottom. The collar 20 is connected to the connecting frame 8.

[0027] During operation, when the deflector plate 6 tilts, causing the first rotating shaft 18 to tilt, the universal joint 7 can be flexibly bent to maintain the first rotating shaft 18 at a fixed angle with the support frame 4, ensuring that the support frame 4 stably supports the casting and causes the casting to tilt synchronously. The collar 20 and the limiting ring 21 ensure that the axial position of the second rotating shaft 19 is fixed during rotation, preventing the transmission shaft 5 from shifting or shaking due to tilting. The universal joint 7 enables the transmission shaft 5 to adapt its angle to meet the transmission requirements when the deflector plate 6 is tilted. The collar 20 and the limiting ring 21 ensure the rotational stability of the transmission shaft 5, improve the reliability of equipment operation, and ensure that while the support mechanism 3 revolves with the turntable 2, the transmission shaft 5 can drive the support frame 4 to achieve a self-rotation effect, improving the uniformity of casting cooling.

[0028] To achieve precise matching between the deflection plate 6 and the slide rail 11, and to prevent the deflection plate 6 from disconnecting from the slide rail 11 or causing mechanical jamming when it deflects, the deflection plate 6 is provided with sliding grooves 22 on both sides along its length. Each sliding groove 22 is provided with a sliding seat 23. A transmission rod 24 is hinged to the bottom of the sliding seat 23. A sliding ball head 25 is fixedly installed at the bottom of the transmission rod 24. The two sliding ball heads 25 are located in the grooves 26 of the inner rail 12 and the outer rail 13, respectively.

[0029] Turntable 2 drives the bearing mechanism 3 to rotate, and sliding ball head 25 moves along slide rail 11 groove 26. When the step height of slide rail 11 changes, transmission rod 24 rises and falls with sliding ball head 25, pushing sliding seat 23 to slide within sliding groove 22, causing deflection plate 6 to rotate around transmission shaft 5, thereby adjusting the tilt angle. The length design of sliding groove 22 provides sufficient movement space for sliding seat 23, ensuring that deflection plate 6 can achieve flexible tilting within a preset angle range. The cooperation between sliding ball head 25 and slide groove 26 ensures precise drive of the track to deflection plate 6, and the sliding connection between sliding seat 23 and sliding groove 22 makes angle adjustment more flexible, reduces mechanical jamming, and improves the smoothness of device operation.

[0030] The lower half of the second rotating shaft 19 is fixedly mounted with a driven gear 27. The rotary drive mechanism includes a rotary driver 28, a drive gear 29, and a transmission ring 30. The transmission ring 30 is rotatably mounted on the inner wall of the slide rail 11. The outer wall of the transmission ring 30 is provided with outer ring teeth, and the inner wall of the transmission ring 30 is provided with inner ring teeth. The output end of the rotary driver 28, which is fixedly mounted on the frame 1, is fixedly connected to the drive gear 29. The drive gear 29 meshes with the transmission ring 30 through the outer ring teeth, and the transmission ring 30 meshes with several driven gears 27 through the inner ring teeth.

[0031] The rotary drive mechanism is activated, and the drive gear 29 drives the transmission ring 30 to rotate. The transmission ring 30 synchronously drives all driven gears 27 to rotate through its inner teeth, thereby causing the castings on the second rotating shaft 19, the first rotating shaft 18, and the support frame 4 to rotate. A single drive source achieves multi-axis synchronous transmission, ensuring that all castings rotate at the same speed. Synchronous transmission ensures uniform cooling of castings at each station, avoiding inconsistent cooling quality due to differences in rotational speed.

[0032] like Figure 6 As shown, in order to ensure the stable placement of the casting during the cooling process and to ensure that the casting will not shift when deflected at a certain angle, the support frame 4 is provided with a central limiting head 31, a bottom supporting rod 32 and a lateral limiting rod 33. Several bottom supporting rods 32 and lateral limiting rods 33 are provided and distributed in a ring around the axis of the transmission shaft 5. The central limiting head 31 is located at the center of the support frame 4, and the height of the lateral limiting rod 33 is higher than the height of the bottom supporting rod 32.

[0033] The casting is placed on the support frame 4, and the central limiting head 31 is inserted into the center hole of the casting for positioning. The bottom support rod 32 supports the bottom of the casting, and the lateral limiting rods 33 clamp the casting from the side. The three components work together to limit the displacement of the casting during horizontal, inclined, and rotational processes. The height design of the lateral limiting rods 33 can accommodate castings of different heights, improving the versatility of the device. The multi-directional limiting structure effectively prevents the casting from shaking or falling during angle adjustment and rotation, ensuring a stable cooling process. The ring-shaped distribution of the lateral limiting rods 33 adapts to castings of different shapes, expanding the applicability of the device. It is worth mentioning that the position of the lateral limiting rods 33 can be installed in different locations depending on the shape of the casting being processed.

[0034] This design is suitable for bearing and air-cooling disc-shaped and ring-shaped metal castings, such as metal steering wheels, metal bearing sleeves, and wheel hubs.

[0035] The central limiting head 31 is hollow, and the top of the hollow limiting head is chamfered. The outer wall of the hollow limiting head fits against the inner hole sidewall at the center of the metal casting.

[0036] The hollow structure creates an airflow avoidance channel during air-cooling operations, reducing the impact on the flow of high-speed cooling air, improving heat dissipation efficiency, and also reducing the weight of the limiting head and the load on the drive shaft 5. The top chamfer facilitates the quick insertion of the casting into the central limiting head 31, improving feeding efficiency and providing an automatic centering function. The outer wall fits snugly against the inner hole of the casting, ensuring accurate positioning, preventing radial displacement of the casting during rotation, ensuring consistent cooling position, improving cooling uniformity, and further enhancing cooling quality.

[0037] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A multi-station air-cooling device for metal castings, comprising a frame (1), a turntable (2), and a plurality of ring-shaped supporting mechanisms (3) mounted on the turntable (2), characterized in that, The bearing mechanism (3) consists of a bearing frame (4), a drive shaft (5), and a deflection plate (6). The bearing frame (4) is fixedly connected to the vertically arranged drive shaft (5). The deflection plate (6) is located below the bearing frame (4). A universal joint (7) is provided on the drive shaft (5). The turntable (2) is connected to the bearing frame (4) through a connecting frame (8). A guide column (9) is vertically fixed at the center of the turntable (2). The top of the guide column is provided with several rings that match the bearing mechanism (3). The arc-shaped jet head (10) is fixed with a slide rail (11) in a ring on the frame (1). The slide rail (11) is divided into a horizontal station, an inner station and an outer station. The deflection plate (6) is set radially along the turntable (2). The center of the deflection plate (6) is rotatably connected to the drive shaft (5). The tilt angle of the deflection plate (6) at different stations changes synchronously with the height of the slide rail (11). The frame (1) is equipped with a rotary drive mechanism, which is connected to several drive shafts (5).

2. The multi-station air-cooling device for metal castings according to claim 1, characterized in that, The slide rail (11) is divided into an inner rail (12) and an outer rail (13). The top of the slide rail (11) is composed of a horizontal step (14), a high step (15), a low step (16) and an inclined step (17) of different heights. The height of the horizontal step (14) is between the high step (15) and the low step (16). The inclined step (17) is used to connect two adjacent horizontal steps (14), high steps (15) or low steps (16) of different heights.

3. The multi-station air-cooling device for metal castings according to claim 2, characterized in that, The horizontal station of the slide rail (11) is composed of an inner rail (12) and an outer rail (13) both located at the horizontal step (14). The inner station of the slide rail (11) is composed of an inner rail (12) located at the low step (16) and an outer rail (13) located at the high step (15). The outer station of the slide rail (11) is composed of an inner rail (12) located at the high step (15) and an outer rail (13) located at the low step (16). The inclined steps (17) at each connection of the inner rail (12) and the outer rail (13) are set in opposite directions.

4. A multi-station air-cooling device for metal castings according to claim 3, characterized in that, The drive shaft (5) consists of a first rotating shaft (18) and a second rotating shaft (19). The first rotating shaft (18) is fixedly connected to the support frame (4). The second rotating shaft (19) located below the first rotating shaft (18) is connected to the bottom of the first rotating shaft (18) through a universal joint (7). A collar (20) is rotatably connected on the second rotating shaft (19). Limiting rings (21) are provided on both the upper and lower sides of the collar (20). The collar (20) is connected to the connecting frame (8).

5. A multi-station air-cooling device for metal castings according to claim 4, characterized in that, The deflection plate (6) has sliding grooves (22) on both sides along its length. Each sliding groove (22) has a sliding seat (23). A transmission rod (24) is hinged to the bottom of the sliding seat (23). A sliding ball head (25) is fixedly installed at the bottom of the transmission rod (24). The two sliding balls head (25) are located in the grooves (26) of the inner rail (12) and the outer rail (13), respectively.

6. A multi-station air-cooling device for metal castings according to claim 4, characterized in that, The lower half of the second rotating shaft (19) is fixedly mounted with a driven gear (27). The rotary drive mechanism includes a rotary driver (28), a drive gear (29), and a transmission ring (30). The transmission ring (30) is rotatably mounted on the inner wall of the slide rail (11). The outer wall of the transmission ring (30) is provided with outer ring teeth, and the inner wall of the transmission ring (30) is provided with inner ring teeth. The output end of the rotary driver (28) fixedly mounted on the frame (1) is fixedly connected to the drive gear (29). The drive gear (29) meshes with the transmission ring (30) through the outer ring teeth, and the transmission ring (30) meshes with several driven gears (27) through the inner ring teeth.

7. A multi-station air-cooling device for metal castings according to claim 1, characterized in that, The support frame (4) is provided with a central limiting head (31), a bottom support rod (32) and a side limiting rod (33). The bottom support rod (32) and the side limiting rod (33) are provided in several units and are distributed in a ring around the axis of the drive shaft (5). The central limiting head (31) is located at the center of the support frame (4), and the height of the side limiting rod (33) is higher than the height of the bottom support rod (32).

8. A multi-station air-cooling device for metal castings according to claim 7, characterized in that, The center limiting head (31) is hollow, and the top of the hollow limiting head is chamfered. The outer wall of the hollow limiting head fits against the inner hole sidewall at the center of the metal casting.

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