Cooling system optimization device and method for aluminum alloy hub low-pressure casting mold

Abstract

The invention discloses a cooling system optimization device and method for an aluminum alloy hub low-pressure casting die, and relates to the technical field of aluminum alloy hub low-pressure casting production, the device comprises a die body and an external auxiliary cooling system, the side wall of the die body is provided with a cooling liquid flow channel, and a fracture is formed in the cooling liquid flow channel and is communicated through an external pipeline; the external auxiliary cooling system is attached to the outer side wall of the mold body, the inner side of the external auxiliary cooling system is provided with a pipeline groove for clamping an external pipeline, a traditional cooling liquid continuous circulation mode is changed, cooling liquid sectional type flowing and cooling are achieved, and the cooling efficiency and the casting quality are improved. Meanwhile, by setting a target parameter range, monitoring the temperature of a cooling liquid outlet and the temperature and the flow speed of an external auxiliary cooling system in real time, and controlling a variable frequency water pump and a refrigerating unit through feedback of a controller, accurate dynamic control over the cooling process is achieved. The system solves the problems that a traditional cooling system is low in efficiency and inaccurate in temperature control, and has the advantages of being high in cooling efficiency, accurate in temperature control, reliable, maintainable and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aluminum alloy wheel hub low pressure casting production, and more particularly to a cooling system optimization device and method for an aluminum alloy wheel hub low pressure casting mold. BACKGROUND

[0002] Aluminum alloy wheels have been widely used in the automotive industry due to their light weight, high strength, and good heat dissipation performance. In the production process of aluminum alloy wheels, low pressure casting is a commonly used manufacturing process. However, when using the low pressure casting process, the cooling system of the mold plays a crucial role in the quality and production efficiency of the casting. Traditional cooling systems usually adopt a centralized circulating runner design, with the cooling liquid continuously circulating inside the mold. This design has many shortcomings:

[0003] On the one hand, when the cooling liquid circulates in the mold runner, the path is long and the flow resistance is large, resulting in uneven cooling effect in different areas. The mold area near the cooling liquid inlet cools too quickly, while the area far from the inlet cools insufficiently, resulting in uneven temperature distribution in the casting during the cooling process, which is prone to thermal stress and deformation, and thus causes defects such as shrinkage and porosity, seriously affecting the internal quality and dimensional accuracy of the casting. On the other hand, the external auxiliary cooling means of the traditional cooling system can only perform simple overall cooling of the mold, and cannot form an effective synergistic effect with the internal cooling system, making it difficult to accurately control the temperature of the local area of the mold and to effectively adjust and optimize the temperature of the cooling liquid. In addition, the long circulation path of the cooling liquid results in significant temperature differences when the cooling liquid flows through different areas of the mold, further affecting the cooling effect and the stability of the casting quality.

[0004] With the continuous development of the automotive industry, the quality and performance requirements of aluminum alloy wheels are increasingly high. The shortcomings of the existing cooling system of the aluminum alloy wheel low pressure casting mold in terms of cooling efficiency and temperature control accuracy have been unable to meet the production needs of modern automotive industry for high-quality wheels. Therefore, developing an optimized cooling system to improve the cooling efficiency and achieve accurate temperature control of the mold has important practical significance for improving the casting quality and production efficiency of aluminum alloy wheels. SUMMARY

[0005] In view of the above, the present application provides a cooling system optimization device for an aluminum alloy wheel hub low pressure casting mold, which aims to solve the above technical problems.

[0006] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0007] A cooling system optimization device for an aluminum alloy wheel hub low pressure casting mold, comprising:

[0008] The mold body has a side wall with a cooling liquid flow channel, one end of the cooling liquid flow channel is a cooling liquid inlet, the other end is a cooling liquid outlet, the cooling liquid flow channel is formed with a break, and the break is communicated by an external pipeline leading out of the mold body.

[0009] An external auxiliary cooling system is attached to the outer side wall of the mold body, and has a pipeline groove on the inner side, and the external pipeline is clamped in the pipeline groove.

[0010] According to the above technical scheme, the cooling liquid flow channel in the mold body is formed with a break, which is communicated by an external pipeline, changing the traditional mode of continuous circulation of cooling liquid in the mold, so that the cooling liquid can flow out after flowing through a section in the mold, be cooled by the external auxiliary cooling system and then flow into the mold, which is beneficial to more accurately control the cooling effect of different areas of the mold and improve the cooling efficiency and casting quality. The external auxiliary cooling system is attached to the outer side wall of the mold body, and has a pipeline groove on the inner side, and the external pipeline is clamped in the pipeline groove, which not only can cool the cooling liquid flowing out of the mold, but also can play a certain auxiliary cooling effect on the outer wall of the mold through its own low temperature, enhance the overall cooling effect, and the structure is compact, easy to install and layout.

[0011] Preferably, in the cooling system optimization device of the aluminum alloy hub low-pressure casting mold, the break of the cooling liquid flow channel has a break flow port communicated with the outside, the break flow port, the cooling liquid inlet and the cooling liquid outlet are all connected with joints through threads, the break flow port is communicated with the external pipeline, the cooling liquid inlet is connected with an inlet pipeline, the cooling liquid outlet is connected with an outlet pipeline, and the inlet pipeline and the outlet pipeline are clamped into the pipeline groove of the external auxiliary cooling system and led out of the external auxiliary cooling system.

[0012] The break flow port, the cooling liquid inlet and the cooling liquid outlet are all connected with joints through threads, which is a simple and reliable connection method, easy to install and disassemble, and is beneficial to maintain, repair or replace the cooling liquid flow channel and related parts during the use of the mold. At the same time, the inlet pipeline and the outlet pipeline are clamped into the pipeline groove of the external auxiliary cooling system and led out, so that the pipeline arrangement of the whole cooling system is more regular and orderly, reducing the interference and safety hazards caused by pipeline disorder.

[0013] Preferably, in the above-mentioned cooling system optimization device of the low-pressure casting mold of the aluminum alloy wheel hub, the external auxiliary cooling system includes an inner cold water plate and an outer cold water plate, the inner cold water plate is arranged in contact with the outer wall of the mold body, and the inner cold water plate is provided with a plurality of positioning countersunk holes corresponding to the joints, the joints are connected to the side walls of the mold body through the positioning countersunk holes, and the inner cold water plate is pressed against the outer wall of the mold body, the outer cold water plate is aligned with the inner cold water plate, and is detachably connected, and forms the pipeline groove with the inner cold water plate.

[0014] The inner cold water plate fits snugly against the outer wall of the mold body and is compressed by a joint, ensuring a close fit to the mold surface and effectively transferring heat away from the mold. The positioning countersunk holes ensure accurate joint installation and prevent the cold water plate from shifting or loosening during installation. The outer and inner cold water plates mate to form a pipe groove, providing stable support and protection for the external pipes. The detachable connection allows for easy access to the internal pipes for cleaning or maintenance when needed.

[0015] Preferably, in the above-mentioned cooling system optimization device for the low-pressure casting mold of an aluminum alloy wheel hub, the coolant flow channel is coiled in a serpentine shape inside the mold body, and its coiled section corresponds to the external pipeline.

[0016] The coolant flow channel, coiled in a serpentine pattern within the mold body, increases the coolant's flow path and residence time within the mold, allowing the coolant to more fully absorb mold heat and improve cooling efficiency. The corresponding coiled section maps to the external piping, creating a more rational layout and optimizing the coolant's flow direction and velocity, further enhancing cooling effectiveness.

[0017] Preferably, in the above-mentioned cooling system optimization device for the low-pressure casting mold of an aluminum alloy wheel hub, a plurality of coolant flow channels are provided, and the supply and circulation of the coolant are controlled independently.

[0018] By setting up multiple coolant flow channels and individually controlling the supply and circulation of coolant, the cooling intensity of each flow channel can be flexibly adjusted according to the temperature requirements of the mold in different positions, realizing precise control of the mold temperature in different zones, effectively avoiding casting defects caused by uneven temperature in different areas of the mold, and improving the overall quality and consistency of the castings.

[0019] Preferably, in the above-mentioned cooling system optimization device for the low-pressure casting mold of an aluminum alloy wheel hub, a first temperature sensor is provided at the coolant outlet, and a second temperature sensor is provided between the external auxiliary cooling system and the outer wall of the mold body.

[0020] The first temperature sensor at the outlet of the cooling liquid can directly monitor the temperature of the cooling liquid flowing out of the mold, reflecting the cooling condition inside the mold; the second temperature sensor between the external auxiliary cooling system and the outer wall of the mold body can obtain the cooling effect of the external auxiliary cooling system on the outer wall of the mold in real time. The combination of the two provides comprehensive temperature information for the control system and provides a reliable basis for subsequent precise cooling control.

[0021] Preferably, in the cooling system optimization device of the low-pressure casting mold for the aluminum alloy wheel hub, a flow sensor is installed at the inlet of the cooling liquid.

[0022] The flow sensor at the inlet of the cooling liquid can monitor the flow rate of the cooling liquid entering the mold in real time, so that the control system can adjust the speed of the frequency conversion water pump in time according to the deviation between the actual flow rate and the target flow rate, ensure that the cooling liquid flows at the appropriate speed, meet the cooling demand of the mold, and further improve the controllability and stability of the cooling process.

[0023] Preferably, in the cooling system optimization device of the low-pressure casting mold for the aluminum alloy wheel hub, a frequency conversion water pump for controlling the circulation flow rate of the cooling liquid is arranged at the inlet of the cooling liquid, and a refrigeration unit for controlling the temperature is connected to the external auxiliary cooling system.

[0024] The frequency conversion water pump at the inlet of the cooling liquid can accurately control the circulation flow rate of the cooling liquid as needed, realize stepless adjustment of the cooling liquid flow, and meet the cooling demand of the mold under different working conditions. The refrigeration unit connected to the external auxiliary cooling system can effectively adjust its own temperature, thereby controlling the cooling intensity of the cooling liquid and the mold, and the two work together to provide a strong guarantee for the efficient operation of the entire cooling system.

[0025] Preferably, in the cooling system optimization device of the low-pressure casting mold for the aluminum alloy wheel hub, a PLC controller is further included, the PLC controller is electrically connected with the first temperature sensor, the second temperature sensor and the flow sensor, and receives the detection signals thereof, the PLC controller is electrically connected with the control ends of the frequency conversion water pump and the refrigeration unit, and the PLC controller feeds back controls the frequency conversion water pump and the refrigeration unit according to the sensor signals detected thereby.

[0026] The PLC controller is electrically connected with each sensor and executing mechanism, can receive temperature and flow signals in real time, and quickly makes feedback according to the preset control logic to accurately control the operation of the frequency conversion water pump and the refrigeration unit. Such an automatic control system not only improves the stability and precision of the cooling process, but also reduces manual intervention, reduces the risk of operation errors, improves production efficiency and the reliability of the quality of castings.

[0027] The application also provides a method for optimizing the cooling system of an aluminum alloy wheel hub low-pressure casting mold, specifically comprising:

[0028] ① Set target parameters:

[0029] Set the target temperature range of the cooling liquid outlet: T out_min -T out_max ;

[0030] Set the target temperature range of the external auxiliary cooling system: T cooling-plat _ min -T cooling-plat_max ;

[0031] Set the target range of the cooling liquid flow rate: V min -V max ;

[0032] ② Real-time monitoring:

[0033] During system operation, continuously monitor T out , T cooling-plat , and V;

[0034] ③ Control logic:

[0035] When T out >T out_max :

[0036] Increase the flow rate: if V max , increase the flow rate V;

[0037] Lower the external auxiliary cooling system temperature: if T cooling-plat >T cooling-plat _ min , lower the external auxiliary cooling system temperature;

[0038] When T out <T out_min :

[0039] Reduce the flow rate: if V min , reduce the flow rate V;

[0040] Increase the external auxiliary cooling system temperature: if T cooling-plat <T cooling-plat_max , increase the external auxiliary cooling system temperature;

[0041] When T cooling-plat >T cooling-plat_max :

[0042] Strengthen refrigeration: regardless of the value of T out , lower the temperature of the external auxiliary cooling system;

[0043] When Tcooling-plat cooling-plat min Time:

[0044] Reduced refrigeration: both increase the temperature of the external auxiliary cooling system.

[0045] Through the above technical scheme, the target parameters are set, the temperature and flow rate are monitored in real time, and the flow rate of the cooling liquid and the temperature of the external auxiliary cooling system are adjusted according to the specific control logic, so that the mold cooling process is accurately and dynamically controlled. The method can effectively balance the relationship between direct cooling of the internal cooling liquid and indirect cooling of the external auxiliary cooling system, fully play the synergistic effect of the two, and ensure that the mold temperature always remains in an appropriate range, thereby significantly improving the casting quality and production efficiency of the aluminum alloy wheel hub.

[0046] Through the above technical scheme, compared with the prior art, the present application provides a cooling system optimization device and method for an aluminum alloy wheel hub low-pressure casting mold, which has the following beneficial effects:

[0047] 1. Significant improvement in cooling efficiency: through the segmented cooling liquid flow channel design, the cooling liquid can stay in the key areas inside the mold for a short time and efficiently absorb heat, and then flow out of the mold, be cooled by the external auxiliary cooling system, and then return. This process speeds up the transfer and dissipation of heat, effectively improves the cooling efficiency, and solves the problems of uneven cooling effect and low cooling efficiency in traditional cooling systems due to long cooling liquid circulation path and large flow resistance.

[0048] 2. Significant improvement in casting quality: precise control of the temperature and flow rate of the cooling liquid, as well as the temperature of the external auxiliary cooling system, can achieve fine adjustment of the mold temperature, avoid local overheating or overcooling of the mold, reduce thermal stress and deformation of the casting due to uneven temperature during the cooling process, effectively prevent defects such as shrinkage and porosity, and significantly improve the casting quality of the aluminum alloy wheel hub to meet the demand of the modern automobile industry for high-quality wheel hubs.

[0049] 3. Enhanced precision of temperature control: with the help of multiple temperature sensors to monitor the cooling liquid outlet temperature, the temperature between the external auxiliary cooling system and the mold outer wall, and the flow rate sensor to monitor the cooling liquid flow rate, and in combination with the PLC controller to feedback control the frequency conversion water pump and refrigeration unit according to the preset control logic, real-time, dynamic and accurate control of the cooling process is achieved, ensuring that the mold temperature always remains stable within the appropriate process range, improving the stability of production and the consistency of casting quality.

[0050] ​​4. Improved reliability and maintainability of the system: The structural design of components such as the cooling liquid flow channel in the mold body, the external auxiliary cooling system, the frequency conversion water pump, the refrigeration unit, etc. is reasonable, the connection method is simple and reliable, and it is convenient to install, disassemble and maintain. The detachable inner and outer cooling water plate structure, threaded joint and other designs make it convenient and fast to overhaul, clean or replace parts of the cooling system during mold use, reducing equipment maintenance cost and downtime, improving production efficiency.

[0051] 5. Significant improvement in production efficiency: The efficient cooling system and precise temperature control shorten the production cycle of aluminum alloy hubs, improve the production efficiency of the equipment, reduce the production cost, enhance the market competitiveness of the enterprise, and provide strong technical support for large-scale production of aluminum alloy hubs. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0053] Figure 1 The figure is a system schematic diagram of the cooling system optimization device of the low-pressure casting mold for aluminum alloy hubs provided by the present application.

[0054] Figure 2 The figure is a structural schematic diagram of the cooling system optimization device of the low-pressure casting mold for aluminum alloy hubs provided by the present application.

[0055] Figure 3 The figure is a structural exploded schematic diagram of the cooling system optimization device of the low-pressure casting mold for aluminum alloy hubs provided by the present application.

[0056] Figure 4 The figure is a cross-sectional view of the cooling liquid flow channel provided by the present application.

[0057] Figure 5 The figure is a structural exploded schematic diagram of the external auxiliary cooling system provided by the present application.

[0058] Figure 6 The figure is a structural schematic diagram of the joint provided by the present application.

[0059] Figure 7 The figure is a structural schematic diagram of the external pipeline provided by the present application.

[0060] Among them:

[0061] 1-mold body;

[0062] 11-cooling liquid flow channel; 111-cooling liquid inlet; 112-cooling liquid outlet; 113-break flow port; 114-coil section; 12-break;

[0063] 2-external auxiliary cooling system;

[0064] 21-inner side cooling water plate; 211-positioning counterbore; 22-outer side cooling water plate; 23-pipeline groove; 24-second temperature sensor;

[0065] 3-external pipeline;

[0066] 4-joint;

[0067] 5-liquid inlet pipeline;

[0068] 51-flow sensor;

[0069] 6-liquid outlet pipeline;

[0070] 61-first temperature sensor;

[0071] 7-variable frequency water pump;

[0072] 8-refrigeration unit;

[0073] 9-PLC controller. DETAILED DESCRIPTION

[0074] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0075] Referring to the drawings in the embodiments of the present application, Figure 1 to the drawings in the embodiments of the present application, Figure 7 The embodiments of the present application disclose a cooling system optimization device of an aluminum alloy hub low-pressure casting mold, comprising:

[0076] The mold body 1 has a cooling liquid flow channel 11 on the side wall, one end of the cooling liquid flow channel 11 is a cooling liquid inlet 111, the other end is a cooling liquid outlet 112, the cooling liquid flow channel 11 is formed with a break 12, and the break 12 is communicated through an external pipeline 3 leading out of the mold body 1;

[0077] The external auxiliary cooling system 2 is attached and arranged on the outer side wall of the mold body 1, and the external auxiliary cooling system 2 has a pipeline groove 23 on the inner side, and the external pipeline 3 is clamped in the pipeline groove 23.

[0078] Referring to the drawings in the embodiments of the present application, Figure 4and attached Figure 6 The fracture 12 of the coolant flow channel 11 has a fracture flow opening 113 connected to the outside. The fracture flow opening 113, the coolant inlet 111 and the coolant outlet 112 are all connected with a joint 4 through a threaded connection. The fracture flow opening 113 is connected to the external pipeline 3, the coolant inlet 111 is connected to the liquid inlet pipeline 5, and the coolant outlet 112 is connected to the liquid outlet pipeline 6. The liquid inlet pipeline 5 and the liquid outlet pipeline 6 are both stuck in the pipeline groove 23 of the external auxiliary cooling system 2 and lead out of the external auxiliary cooling system 2.

[0079] See attached Figure 5 The external auxiliary cooling system 2 includes an inner cold water plate 21 and an outer cold water plate 22. The inner cold water plate 21 is arranged in contact with the outer wall of the mold body 1, and a plurality of positioning countersunk holes 211 corresponding to the joint 4 are provided on the inner cold water plate 21. The joint 4 passes through the positioning countersunk holes 211 and is connected to the side wall of the mold body 1, and presses the inner cold water plate 21 against the outer wall of the mold body 1. The outer cold water plate 22 is aligned with the inner cold water plate 21 and is detachably connected, and forms a pipeline groove 23 with the inner cold water plate 21.

[0080] In this embodiment, the outer cold water plate 22 and the inner cold water plate 21 are fastened together by bolts. In an alternative embodiment, they may also be connected by snap fastening.

[0081] Cooling water is contained in the outer cold water plate 22 and the inner cold water plate 21 .

[0082] To further optimize the above technical solution, the coolant channel 11 is coiled in a serpentine shape inside the mold body 1, and its coiled section 114 corresponds to the external pipeline 3. This structural design prevents the fracture 12 from reducing the area covered by the coolant channel 11 inside the mold body 1, without affecting the effect.

[0083] In order to further optimize the above technical solution, a plurality of coolant flow channels 11 are provided, and the supply and circulation of the coolant are controlled independently.

[0084] In order to further optimize the above technical solution, a first temperature sensor 61 is provided at the coolant outlet 112 , and a second temperature sensor 24 is provided between the external auxiliary cooling system 2 and the outer wall of the mold body 1 .

[0085] In order to further optimize the above technical solution, a flow sensor 51 is installed at the coolant inlet 111 .

[0086] In order to further optimize the above technical solution, a variable frequency water pump 7 for controlling the circulation flow rate of the coolant is provided at the coolant inlet 111, and the external auxiliary cooling system 2 is connected to a refrigeration unit 8 for controlling the temperature.

[0087] In order to further optimize the above technical scheme, the PLC controller 9 is further included, the PLC controller 9 is electrically connected with the first temperature sensor 61, the second temperature sensor 24 and the flow sensor 51, and receives detection signals of the first temperature sensor 61, the second temperature sensor 24 and the flow sensor 51, the PLC controller 9 is electrically connected with control ends of the variable frequency water pump 7 and the refrigerating unit 8, and the PLC controller 9 feeds back controls the variable frequency water pump 7 and the refrigerating unit 8 according to the sensor signals detected by the PLC controller 9.

[0088] The method for optimizing the cooling system of the low-pressure casting mold for the aluminum alloy wheel hub provided by the embodiment specifically comprises the following steps:

[0089] ① Set target parameters:

[0090] Set the target temperature range of the cooling liquid outlet 112: T out_min -T out_max ;

[0091] Set the target temperature range of the external auxiliary cooling system 2: T cooling-plat _ min -T cooling-plat_max ;

[0092] Set the target range of the flow rate of the cooling liquid: V min -V max ;

[0093] ② Real-time monitoring:

[0094] During the operation of the system, T out , T cooling-plat and V are continuously monitored;

[0095] ③ Control logic:

[0096] When T out > T out_max :

[0097] Increase the flow rate: if V max , increase the flow rate V;

[0098] Reduce the temperature of the external auxiliary cooling system 2: if T cooling-plat > T cooling-plat _ min , reduce the temperature of the external auxiliary cooling system 2;

[0099] When T out < T out_min :

[0100] Reduce the flow rate: if V min , reduce the flow rate V;

[0101] Increase the temperature of the external auxiliary cooling system 2: if T cooling-plat < T cooling-plat_max, increase the temperature of the external auxiliary cooling system 2;

[0102] When T cooling-plat > T cooling-plat_max :

[0103] Enhanced cooling: Regardless of the situation of T out , reduce the temperature of the external auxiliary cooling system 2;

[0104] When T cooling-plat < T cooling-plat min :

[0105] Weakened cooling: Increase the temperature of the external auxiliary cooling system 2.

[0106] Example 1:

[0107] Set target parameters: Assuming that the target temperature range of the cooling liquid outlet 112 is set to 25-35℃, the target temperature range of the external auxiliary cooling system 2 is set to 20-30℃, and the target range of the cooling liquid flow rate is set to 5-15L / min.

[0108] System operation monitoring: When the system is running, the PLC controller 9 continuously monitors the cooling liquid flow rate, cooling liquid outlet temperature, and external auxiliary cooling system temperature data returned by the first temperature sensor 61 at the cooling liquid outlet 112, the second temperature sensor 24 between the external auxiliary cooling system 2 and the outer wall of the mold body 1, and the flow sensor 51 at the cooling liquid inlet 111.

[0109] Control logic:

[0110] When the cooling liquid outlet temperature exceeds 35℃: If the cooling liquid flow rate is lower than 15L / min at this time, the PLC controller 9 will increase the frequency of the variable frequency water pump 7, thereby increasing the cooling liquid flow rate, so that the cooling liquid can quickly take away the heat inside the mold body 1; at the same time, if the temperature of the external auxiliary cooling system 2 is still higher than 20℃, the PLC controller 9 will send instructions to the refrigeration unit 8 to reduce its refrigeration temperature setting, so that the external auxiliary cooling system 2 can more effectively reduce the cooling liquid temperature.

[0111] When the cooling liquid outlet temperature is lower than 25℃: If the cooling liquid flow rate is higher than 5L / min, the PLC controller 9 will reduce the frequency of the variable frequency water pump 7, reducing the flow rate by 5L / min_step, prolonging the residence time of the cooling liquid in the mold body 1, so that it can fully absorb the heat of the mold; if the temperature of the external auxiliary cooling system 2 is lower than 30℃, the PLC controller 9 will increase the set temperature of the refrigeration unit 8, appropriately weakening the cooling effect of the external auxiliary cooling system 2, to avoid excessive cooling affecting the quality of the casting.

[0112] ​When the temperature of the external auxiliary cooling system is higher than 30℃: no matter what the temperature of the cooling liquid outlet is, the PLC controller 9 will directly send an instruction to the refrigeration unit 8 to strengthen the refrigeration and reduce the temperature of the external auxiliary cooling system to ensure that it can continuously and effectively cool the cooling liquid.

[0113] When the temperature of the external auxiliary cooling system is lower than 20℃: the PLC controller 9 will control the refrigeration unit 8 to weaken the refrigeration and raise the temperature of the external auxiliary cooling system 2 to maintain the temperature within a reasonable range, preventing the temperature of the cooling liquid from being excessively reduced due to the excessively low temperature of the external auxiliary cooling system 2, which affects the heat balance inside the mold body 1.

[0114] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part.

[0115] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cooling system optimization device for a low-pressure casting mold of an aluminum alloy wheel hub, characterized in that: include: A mold body (1), wherein the side wall of the mold body (1) has a coolant flow channel (11), one end of the coolant flow channel (11) is a coolant inlet (111), and the other end is a coolant outlet (112), and the coolant flow channel (11) is formed with a fracture (12), and the fracture (12) is connected through an external pipeline (3) leading out of the mold body (1); An external auxiliary cooling system (2) is arranged on the outer side wall of the mold body (1), and a pipeline groove (23) is provided on the inner side of the external auxiliary cooling system (2), and the external pipeline (3) is clamped in the pipeline groove (23).

2. The cooling system optimization device for a low-pressure casting mold of an aluminum alloy wheel hub according to claim 1, characterized in that: The fracture (12) of the coolant flow channel (11) has a fracture flow opening (113) connected to the outside, the fracture flow opening (113), the coolant inlet (111) and the coolant outlet (112) are all connected to a joint (4) through a thread, the fracture flow opening (113) is connected to the external pipeline (3), the coolant inlet (111) is connected to the liquid inlet pipeline (5), and the coolant outlet (112) is connected to the liquid outlet pipeline (6), and the liquid inlet pipeline (5) and the liquid outlet pipeline (6) are both inserted into the pipeline groove (23) of the external auxiliary cooling system (2) and lead out of the external auxiliary cooling system (2).

3. The cooling system optimization device for a low-pressure casting mold of an aluminum alloy wheel hub according to claim 2, characterized in that: The external auxiliary cooling system (2) comprises an inner cold water plate (21) and an outer cold water plate (22), wherein the inner cold water plate (21) is arranged in contact with the outer wall of the mold body (1), and a plurality of positioning countersunk holes (211) corresponding to the joints (4) are provided on the inner cold water plate (21), and the joints (4) pass through the positioning countersunk holes (211) to connect with the side wall of the mold body (1), and press the inner cold water plate (21) against the outer wall of the mold body (1), and the outer cold water plate (22) is aligned with the inner cold water plate (21) and is detachably connected, and forms the pipeline groove (23) with the inner cold water plate (21).

4. The cooling system optimization device for a low-pressure casting mold of an aluminum alloy wheel hub according to claim 1, characterized in that: The cooling liquid flow channel (11) is coiled in a serpentine shape inside the mold body (1), and its coiled section (114) corresponds to the external pipeline (3).

5. The cooling system optimization device for a low-pressure casting mold of an aluminum alloy wheel hub according to claim 1, characterized in that: The cooling liquid flow channels (11) are provided in plurality, and the supply and circulation of the cooling liquid are controlled independently.

6. A cooling system optimization device for a low-pressure casting mold of an aluminum alloy wheel hub according to any one of claims 1 to 5, characterized in that: A first temperature sensor (61) is provided at the cooling liquid outlet (112), and a second temperature sensor (24) is provided between the external auxiliary cooling system (2) and the outer wall of the mold body (1).

7. The cooling system optimization device for a low-pressure casting mold of an aluminum alloy wheel hub according to claim 6, characterized in that: A flow sensor (51) is installed at the cooling liquid inlet (111).

8. The cooling system optimization device for a low-pressure casting mold of an aluminum alloy wheel hub according to claim 7, characterized in that: The cooling liquid inlet (111) is provided with a variable frequency water pump (7) for controlling the cooling liquid circulation flow rate, and the external auxiliary cooling system (2) is connected to a refrigeration unit (8) for controlling the temperature.

9. The cooling system optimization device for a low-pressure casting mold of an aluminum alloy wheel hub according to claim 8, characterized in that: The system further comprises a PLC controller (9), wherein the PLC controller (9) is electrically connected to the first temperature sensor (61), the second temperature sensor (24) and the flow sensor (51), and receives detection signals thereof; the PLC controller (9) is electrically connected to the control ends of the variable frequency water pump (7) and the refrigeration unit (8); and the PLC controller (9) feedback-controls the variable frequency water pump (7) and the refrigeration unit (8) according to the sensor signals detected by the PLC controller (9).

10. A method for optimizing the cooling system of a low-pressure casting mold for an aluminum alloy wheel hub according to claims 1-9, characterized in that: Specifically include: ①Set target parameters: Set the target temperature range of the coolant outlet (112): T out_min -T out_max ; Set the target temperature range of the external auxiliary cooling system (2): T cooling-plat _ min -T cooling-plat_max ; Set the target range of coolant flow rate: V min -V max ; ②Real-time monitoring: During system operation, T out 、T cooling-plat and V; ③Control logic: When T out >T out_max hour: Increase flow rate: If V <V max , increase the flow velocity V; Reduce the temperature of the external auxiliary cooling system (2): If T cooling-plat >T cooling-plat _ min , reducing the temperature of the external auxiliary cooling system (2); When T out <T out_min hour: Reduce flow rate: If V>V min , reduce the flow velocity V; Increase the temperature of the external auxiliary cooling system (2): If T cooling-plat <T cooling-plat_max , increasing the temperature of the external auxiliary cooling system (2); When T cooling-plat >T cooling-plat_max hour: Enhanced refrigeration: regardless of T out Regardless of the situation, the temperature of the external auxiliary cooling system (2) is reduced; When T cooling-plat <T cooling-plat _ min hour: Reduce cooling: Increase the temperature of the external auxiliary cooling system (2).

Images