Bottom die cooling structure of hub low-pressure casting die

Abstract

The utility model discloses a hub low-pressure casting die bottom die cooling structure which comprises a bottom die body, a cooling groove is formed in the bottom die body, the opening end of the cooling groove is covered with a sealing cover plate in a sealed mode, an inner sleeve is arranged in the cooling groove, and the inner sleeve is of a hollow closed structure. The inner sleeve is communicated with a water inlet pipe used for supplying low-temperature cooling water, the cooling groove is communicated with a water outlet pipe used for discharging high-temperature cooling water, and a plurality of spraying holes used for spraying the cooling water are evenly distributed in the inner wall, corresponding to the cooling groove, of the inner sleeve. According to the utility model, the inner sleeve is arranged in the cooling tank, so that low-temperature cooling water is sprayed in the cooling tank in a water mist form through the plurality of spraying holes uniformly distributed on the inner sleeve, the problem that the water inlet end of the cooling water tank in the traditional bottom die cooling structure is easily cooled sharply is effectively solved, the accidents of bottom die cracking and water pipe open welding are avoided, and the service life of the cooling water tank is prolonged. The continuous and stable production operation is guaranteed, the problem of uneven cooling of the bottom die body is avoided, and the hub casting quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to casting aluminum alloy wheel hub manufacturing technical field especially relates to a wheel hub low pressure casting mould bottom die cooling structure. BACKGROUND

[0002] Aluminum alloy wheel hub low pressure casting mould usually includes top die, side die and bottom die, when casting, top die, side die and bottom die form the cavity for the aluminum liquid filling, and finally cast aluminum alloy wheel hub blank through pressure maintaining, cooling and other processes, in the cooling and temperature reducing process of the mould, usually adopt the water cooling, air cooling and other cooling structure structures set up on the mould, through cooling water, compressed air and other cooling medium to cool the mould, reach the purpose of cooling the high temperature aluminum liquid in the mould cavity, refer to the attached Figure 1 The bottom die cooling structure of the existing aluminum alloy wheel hub low pressure casting mould includes the water cooling channel set in the bottom die, that is, the annular water tank is set on the bottom die body, then the cover plate is welded on the annular water tank, and the channel for the cooling water flow is formed, the cover plate is reserved with two interval set through holes as the interface of the cooling water in and out of the annular water tank, and the two through holes are communicated with the water inlet pipe and the water outlet pipe respectively, when cooling, the low temperature cooling water enters the annular water tank through the water inlet pipe to cool the bottom die, and the high temperature cooling water after heat exchange is discharged through the water outlet pipe.

[0003] The above bottom die cooling structure in the production practice, the low temperature cooling water is concentrated into the annular water tank through the water inlet pipe, which is easy to cause violent cooling near the water inlet pipe, which is easy to cause the mould cracking, water pipe opening welding and other problems, and the cooling water flows from the water inlet pipe to the water outlet pipe, and gradually heats up in the heat exchange process, so that the cooling water inlet end water cooling effect is good, the water outlet end cooling effect is poor, so that the temperature difference between the water inlet end near the annular water tank and the return end is large, the bottom die cooling temperature is uneven, and the wheel hub casting quality is affected.

[0004] Therefore, developing a wheel hub low pressure casting mould bottom die cooling structure applied to the production practice is the current urgent problem to be solved. UTILITY MODEL CONTENTS

[0005] The utility model discloses to the above-mentioned problem, provide a kind of wheel hub low pressure casting mould bottom die cooling structure, to solve the problem that the existing bottom die cooling structure is used in the process of process is easy to cause mould cracking, water pipe opening welding and other problems, while solving the problem that the existing bottom die cooling structure cooling uniformity is poor, affects wheel hub casting quality.

[0006] To solve the above technical problems, the utility model adopts the technical scheme that:

[0007] A hub low-pressure casting mold bottom die cooling structure, comprising a bottom die body, a cooling groove is formed on the bottom die body, the opening end of the cooling groove is covered with a sealing cover plate, an inner sleeve is arranged in the cooling groove, the inner sleeve is a hollow closed structure, the inner sleeve is communicated with a water inlet pipe for feeding low-temperature cooling water, the cooling groove is communicated with a water outlet pipe for discharging high-temperature cooling water, and a plurality of spray holes for spraying cooling water are uniformly distributed on the inner wall of the inner sleeve corresponding to the cooling groove.

[0008] Preferably, the inner sleeve is a circular pipe, the spray holes are radially formed on the pipe wall of the inner sleeve, and the spray holes are distributed on the horizontal diameter direction and the upper half arc of the inner sleeve, so as to avoid waste of cooling water and reduce the cooling efficiency.

[0009] Preferably, a plurality of water outlet pipes are arranged, and the plurality of water outlet pipes are circumferentially communicated with the cooling groove, so as to quickly discharge the high-temperature cooling water in the cooling groove after heat exchange is completed, and accelerate the discharge rate of the cooling water.

[0010] Preferably, the cooling structure further comprises an air cooling pipe arranged corresponding to the bottom die body, the bottom die body is provided with an air cooling groove, and the air cooling pipe communicated with a compressed air source is arranged towards the air cooling groove.

[0011] The beneficial effects of the present application are as follows:

[0012] The inner sleeve is arranged in the cooling groove, the low-temperature cooling water is sprayed in the form of water mist through the plurality of spray holes uniformly distributed on the inner sleeve, the problem that the water inlet end of the cooling water tank in the traditional bottom die cooling structure is easily subjected to rapid cooling is effectively improved, the cracking of the bottom die and the welding of the water pipe are avoided, the continuous and stable production operation is ensured, meanwhile, the cooling water is uniformly sprayed in the circumferential direction of the cooling groove, the cooling rate of the circumferential direction of the cooling groove is balanced, the problem of uneven cooling of the bottom die body is avoided, and the casting quality of the hub is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0013] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0014] Figure 1 It is a schematic view of the bottom die cooling structure in the prior art.

[0015] Figure 2 It is a structural schematic view of the present application.

[0016] Figure 3 It is Figure 2 It is an enlarged structural schematic view of position A.

[0017] Figure 4 It is a three-dimensional structural schematic view of the present application.

[0018] In the figure: 10 - bottom mold body; 11 - cooling trough; 12 - sealing cover; 13 - air cooling trough 13; 20 - inner sleeve; 21 - water inlet pipe; 22 - water outlet pipe; 23 - spray hole; 30 - air cooling pipe; DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] like Figures 2-4 The figure shows a cooling structure for the bottom mold of a wheel hub low-pressure casting mold. The bottom mold body 10 is provided with a cooling groove 11. The open end of the cooling groove 11 is sealed with a sealing cover plate 12, forming the cooling groove 11 into an annular, sealed chamber. An inner sleeve 20 is disposed within the cooling groove 11. The inner sleeve 20 is a hollow, closed structure. An inlet pipe 21 is connected to the inner sleeve 20 for supplying low-temperature cooling water. A water outlet pipe 22 is connected to the cooling groove 11 for discharging high-temperature cooling water. Multiple spray holes 23 for spraying cooling water are uniformly distributed on the inner wall of the inner sleeve 20 corresponding to the cooling groove 11.

[0021] During use, low-temperature cooling water is introduced into the inner sleeve 20 through the water inlet pipe 21 and sprayed into the cooling tank 11 through the spray hole 23 of the inner sleeve 20 to cool the cooling tank 11. The high-temperature cooling water that has completed the heat exchange is discharged from the cooling tank 11 through the water outlet pipe 22, completing the cooling process of the bottom mold body 10.

[0022] In this embodiment, low-temperature cooling water is sprayed in the cooling tank 11 in the form of water mist through multiple spray holes 23 evenly distributed on the inner sleeve 20, which effectively improves the problem that the water inlet end of the cooling tank in the traditional bottom mold cooling structure is susceptible to rapid cooling, avoids accidents such as bottom mold cracking and water pipe welding, and ensures continuous and stable production operation; at the same time, the cooling water is evenly sprayed in the cooling tank 11 in a circumferential direction, balances the cooling rate of the cooling tank 11 in a circumferential direction, avoids the problem of uneven cooling of the bottom mold body 10, and ensures the casting quality of the wheel hub.

[0023] like Figure 2 As shown, the inner sleeve 20 is a circular tube, and the spray holes 23 are radially opened on the tube wall of the inner sleeve 20. The spray holes 23 are distributed in the horizontal diameter direction and the upper half of the arc of the inner sleeve 20. The low-temperature cooling water supplied in the inner sleeve 20 is sprayed horizontally and upwardly into the cooling tank 11. This prevents the cooling water from being directly sprayed downward toward the sealing cover plate 12 and discharged through the outlet pipe 22, thereby failing to fully cool the inner wall of the cooling tank 11, causing problems such as cooling water waste and reduced cooling efficiency.

[0024] As Figure 4 shown, the water outlet pipe 22 is provided with multiple, multiple water outlet pipe 22 circumferential communication cooling tank 11, to discharge the cooling tank 11 in order to complete the heat exchange of high temperature cooling water, accelerate the discharge rate of cooling water, and thus improve the cooling efficiency of the bottom mold body 10.

[0025] As Figure 2 shown, the cooling structure further comprises the air cooling pipe 30 corresponding to the bottom mold body 10, the bottom mold body 10 is provided with the air cooling tank 13, the air cooling pipe 30 connected with the compressed air source is arranged towards the air cooling tank 13. In use, the compressed air is blown into the air cooling tank 13 through the air cooling pipe 30 to cool the bottom mold body 10. The air cooling method has the advantages of easy control of cooling strength and better cooling uniformity compared with the water cooling method. The air cooling method is used in cooperation with the water cooling method to ensure the cooling efficiency of the bottom mold body 10 while improving the cooling uniformity.

[0026] The above only discloses the specific embodiments of the present application, but the present application is not limited to this. For those skilled in the art, without departing from the principle of the present application, the deformation made should be considered as belonging to the protection of the present application.

Claims

1. A wheel hub low-pressure casting mold bottom mold cooling structure, characterized by: The invention comprises a bottom mold body (10), wherein a cooling groove (11) is provided on the bottom mold body (10), an open end of the cooling groove (11) is sealed with a sealing cover plate (12), an inner sleeve (20) is provided in the cooling groove (11), the inner sleeve (20) is a hollow closed structure, an inlet pipe (21) for supplying low-temperature cooling water is connected to the inner sleeve (20), and the cooling groove (11) is connected to an outlet pipe (22) for discharging high-temperature cooling water, and a plurality of spray holes (23) for spraying cooling water are uniformly distributed on the inner wall of the inner sleeve (20) corresponding to the cooling groove (11).

2. The wheel hub low-pressure casting mold bottom mold cooling structure according to claim 1, characterized in that: The inner sleeve (20) is a circular tube, the spray holes (23) are radially opened on the tube wall of the inner sleeve (20), and the spray holes (23) are distributed in the horizontal diameter direction and on the upper half of the circular arc of the inner sleeve (20).

3. The wheel hub low-pressure casting mold bottom mold cooling structure according to claim 1, characterized in that: A plurality of water outlet pipes (22) are provided, and the plurality of water outlet pipes (22) are circumferentially connected to the cooling groove (11).

4. The wheel hub low-pressure casting mold bottom mold cooling structure according to claim 1, characterized in that: The cooling structure further comprises an air cooling pipe (30) arranged corresponding to the bottom mold body (10), an air cooling groove (13) is provided on the bottom mold body (10), and the air cooling pipe (30) connected to the compressed air source is arranged toward the air cooling groove (13).

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