Cooling structure based on automobile part die casting and cooling method thereof

Abstract

The invention belongs to the technical field of stainless steel smelting, and particularly discloses a cooling structure based on automobile part die-casting and a cooling method thereof.The cooling structure based on automobile part die-casting and the cooling method thereof.The cooling structure based on automobile part die-casting and the cooling method thereof comprise the following steps that S1, a cooling cavity is designed; s2, mounting a cooling pipeline; s3, configuring a cooling medium circulating system; s4, preparation before die casting; s5, cooling in the die casting process; s6, treatment before demolding; s7, a cooling system is maintained and maintained; according to the invention, the temperature of the die-cast automobile part can be rapidly reduced, and the cooling time is shortened, so that the production takt is accelerated, the overall production efficiency is improved, the rapid cooling effect is achieved, the formation of a more compact and uniform microstructure is facilitated, the strength, hardness, wear resistance and other performance indexes of the part are enhanced, and the production cost is reduced; and meanwhile, the thermal fatigue damage of the mold is reduced, the service life of the mold is prolonged, the mold replacement and maintenance cost is reduced, high adaptability is achieved, and the requirements under different production conditions are met.

Description

Technical Field

[0001] The present application relates to the technical field of die-casting automobile parts, and more specifically, to a cooling structure and a cooling method thereof based on die-casting of automobile parts. Background Art

[0002] The die-casting mold is one of the common metal parts processing devices in modern society, and is often installed on a die-casting machine. The die-casting mold is a tool used to cast metal parts. It can complete the die-casting process on a dedicated die-casting machine. The basic process of die-casting is that the molten metal is first cast and filled into the mold cavity at a low speed or a high speed. The mold has a movable cavity surface, which is pressurized and forged as the molten metal cools. This not only eliminates the shrinkage defects of the blank, but also makes the internal structure of the blank reach the broken grains of the forged state. There are two existing cooling systems for cooling the die-casting mold. One is to use a mold temperature controller for cooling, and the other is to directly use water for cooling.

[0003] The cooling system of the die-casting mold is a device used to control the mold temperature and accelerate the cooling of the casting. It is usually composed of a temperature control unit, a pump, a hose, a supply and recovery device, a cooling pipe in the mold, etc. Generally, two cooling methods are used, namely air cooling and water cooling. For parts of the die-casting mold that are difficult to cool with water, air cooling can be used. Water cooling is to set a cooling water channel in the mold so that cooling water flows into the mold to take away heat. Water cooling is efficient and easy to control, and is the most commonly used cooling method for die-casting molds.

[0004] The cooling system is sometimes also called a cooling pipe or a cooling loop. Therefore, the prior art often uses a cooling loop as a cooling pipe for a die-casting mold. The ambient temperature changes in different seasons. If the cooling pipe can fully perform the cooling effect when the ambient temperature is low, but the ambient temperature is high, the cooling water temperature will also increase, which may cause the cooling water to lose its cooling effect halfway through the cooling pipe, which is not conducive to the cooling of the die-casting mold. Therefore, we propose a die-casting mold cooling device and method. Summary of the invention

[0005] The object of the present invention is to provide a cooling structure and a cooling method based on die-casting of automobile parts to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a cooling structure based on die-casting of automobile parts and a cooling method thereof, comprising the following steps:

[0007] S1. Design the cooling cavity: According to the shape and size of the automotive parts, the position and size of the cooling cavity inside the die-casting mold should be reasonably planned to ensure that the cooling cavity can fit closely to the key parts of the parts to achieve efficient heat transfer. Consider the sealing of the cooling cavity and use appropriate sealing materials and structures to prevent leakage of the cooling medium.

[0008] S2. Install cooling pipes: Choose materials with good thermal conductivity, such as copper, aluminum alloy, etc. to make cooling pipes. Distribute the cooling pipes in a mesh structure in the cooling cavity, and ensure that the spacing between the pipes is uniform to ensure uniform cooling. Use professional connection techniques, such as welding or threaded connection, to ensure that the connection of the cooling pipes is firm and reliable, and will not loosen or leak during use;

[0009] S3. Configure cooling medium circulation system: Set up cooling medium storage tank. The capacity of the storage tank should be reasonably selected according to the scale of die-casting production and cooling requirements. Install liquid level gauge and temperature sensor on the storage tank to monitor the liquid level and temperature of the cooling medium in real time. Select a suitable pump to ensure that it can provide sufficient pressure and flow so that the cooling medium flows smoothly in the cooling pipeline. Install control valve to adjust the flow and direction of the cooling medium.

[0010] S4. Preparation before die casting: Check whether the various components of the cooling structure are firmly installed, whether the cooling pipes are unobstructed, whether the cooling medium in the cooling medium storage tank is sufficient and meets the requirements, and determine the appropriate cooling medium type, such as water, oil or special coolant, according to the material and process requirements of the automotive parts, and set the initial cooling medium temperature and flow rate;

[0011] S5. Cooling during die casting: When the die casting mold is closed, the cooling medium circulation system is started immediately. The pump draws the cooling medium from the storage tank, adjusts the flow through the control valve, and then sends it into the cooling pipe. The cooling medium flows in the cooling pipe, exchanges heat with the die casting parts, absorbs the heat of the parts, and continuously adjusts the flow and temperature of the cooling medium according to the shape and size of the parts and the temperature changes of the parts monitored in real time. An intelligent control system can be used to automatically adjust the cooling parameters according to the preset temperature curve and cooling strategy to achieve the best cooling effect.

[0012] S6. Treatment before demoulding: Before the die-cast parts are demoulded, gradually reduce the flow of cooling medium to allow the parts to cool naturally in the mold for a period of time. Natural cooling can make the temperature of the parts more uniform and reduce the internal stress caused by too fast cooling. Determine the natural cooling time according to the specific conditions of the parts. Generally speaking, for large parts or parts with complex shapes, the natural cooling time may need to be longer;

[0013] S7. Maintenance and care of the cooling system: During the die-casting production process, regularly check the various components of the cooling structure, such as whether the cooling pipes are blocked, whether the pumps and control valves are working properly, whether the temperature sensors and liquid level gauges are accurate, etc., and regularly replace the cooling medium to ensure its cooling performance. According to the type and usage of the cooling medium, determine a reasonable replacement cycle, clean and maintain the cooling system, remove dirt and impurities in the cooling pipes, and ensure the efficient operation of the cooling system.

[0014] Preferably, the shape and size of the cooling cavity are designed according to the shape and size of the die-cast part, and the material of the cooling pipe is a metal material with good thermal conductivity.

[0015] Preferably, the cooling medium storage tank is provided with a temperature sensor and a liquid level sensor, the pump is a flow-adjustable pump, and the type of the pump can be selected according to specific needs, such as a centrifugal pump, a plunger pump, etc.

[0016] Preferably, the control valve can be controlled manually or automatically so as to be accurately adjusted according to actual conditions. The control valve is used to control the flow rate and flow direction of the cooling medium.

[0017] Preferably, the cooling cavity is arranged inside the die-casting mold and is in direct contact with the die-casting parts; the cooling pipes are distributed in the cooling cavity and have a mesh structure; the cooling medium circulation system includes a cooling medium storage tank, a pump and a control valve.

[0018] Preferably, the cooling medium is water, oil or other liquid with good thermal conductivity, the temperature setting value is determined according to the material and process requirements of the die-cast part, and the natural cooling time is determined according to the size and shape of the die-cast part.

[0019] Preferably, the natural cooling time is divided into multiple situations. For large parts or parts with complex shapes, the natural cooling time needs to be longer, and for small parts or parts with regular shapes, the natural cooling time needs to be shorter.

[0020] Preferably, the sealing material of the cooling cavity is a suitable sealing material and structure such as rubber or silicone, and the cooling pipe is made of a material with good thermal conductivity such as copper or aluminum alloy.

[0021] Preferably, a plurality of cooling pipes are provided, the plurality of cooling pipes are connected by welding or threading, and the structures of the plurality of cooling pipes are consistent.

[0022] Preferably, the cooling pipeline is configured to see whether there is blockage, whether the pump and control valve are configured to work normally, whether the temperature sensor and liquid level meter are accurate, and whether the cooling medium has a reasonable replacement cycle.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention can quickly reduce the temperature of die-cast automobile parts and shorten the cooling time through the cooling structure and cooling method based on automobile parts die-casting, thereby speeding up the production cycle, improving the overall production efficiency, and achieving the effect of rapid cooling. At the same time, the efficient cooling method enables the parts to enter the next process faster, reducing the production interruption time and realizing continuous production;

[0025] 2. The present invention realizes uniform and rapid cooling through a cooling structure and a cooling method based on die-casting of automobile parts, which can effectively reduce the thermal stress inside the parts, reduce defects such as deformation and cracks caused by thermal stress, improve the dimensional accuracy and mechanical properties of the product, help form a more dense and uniform microstructure, and enhance the performance indicators such as strength, hardness and wear resistance of the parts;

[0026] 3. The present invention uses a cooling structure and a cooling method based on die-casting of automobile parts. The efficient cooling structure and method can reduce energy consumption in the cooling process and reduce production costs. At the same time, the good cooling effect can reduce the working time of the mold at high temperature, reduce thermal fatigue damage of the mold, extend the service life of the mold, and reduce the cost of mold replacement and maintenance;

[0027] 4. The present invention uses a cooling structure and a cooling method based on die-casting of automobile parts, which can be adjusted and optimized according to the shapes, sizes and process requirements of different automobile parts. It has strong adaptability and flexibility, and can quickly adjust the cooling parameters according to actual production conditions to meet the needs under different production conditions. DETAILED DESCRIPTION

[0028] Unless the context clearly dictates otherwise, unmodified nouns and nouns modified by "the" include singular and plural referents.

[0029] As used in the specification and claims, the terms "comprises," "comprising," "having," "may," "containing," and variations thereof as used herein refer to open transitional phrases, terms, or words that require the presence of specified ingredients / steps and allow for the presence of other ingredients / steps. However, such descriptions should be interpreted as also describing compositions or methods as "consisting of" and "consisting essentially of" the recited ingredients / steps, which allows for the presence of only the specified ingredients / steps and any unavoidable impurities that may result therefrom, and excludes other ingredients / steps.

[0030] Numerical values ​​in the specification and claims of this application should be understood to include the same numerical values ​​when reduced to the same number of significant figures and numerical values ​​that differ from the stated value by less than the experimental error of ordinary measurement techniques of the type described in this application for determining the stated value.

[0031] All ranges disclosed herein are inclusive of the indicated endpoints and are independently combinable (eg, the range of "2 grams to 10 grams" includes the endpoints 2 grams and 10 grams, and all intermediate values).

[0032] The terms "about" and "approximately" can be used to include any numerical value that can be varied without changing the basic function of the value. When used with a range, "about" and "approximately" also disclose the range defined by the absolute values ​​of the two endpoints, for example, "about 2 to about 4" also discloses a range of "2 to 4". Generally, the terms "about" and "approximately" can refer to ±10% of the indicated number. However, for temperature, the term "approximately" refers to ±1°C.

[0033] Unless expressly stated otherwise, the percentages of elements are to be considered as percentages by weight of the alloy in question.

[0034] The present disclosure may refer to the temperature of certain method steps. It should be noted that these specifications generally refer to the temperature set by the heat source (such as a furnace), and not necessarily the temperature that the heated material must reach.

[0035] The present invention provides a cooling structure based on die-casting of automobile parts and a cooling method thereof, comprising the following steps:

[0036] S1. Design cooling chamber;

[0037] According to the shape and size of the automotive parts, plan the position and size of the cooling cavity inside the die-casting mold to ensure that the cooling cavity can fully contact the die-casting parts to achieve efficient heat transfer, and consider the sealing of the cooling cavity to prevent leakage of the cooling medium;

[0038] S2. Arrange cooling pipes;

[0039] Lay cooling pipes in a mesh structure in the cooling cavity. The layout of the pipes should cover the entire cooling cavity as evenly as possible to ensure uniform cooling. Choose materials with good thermal conductivity, such as copper, aluminum and other metal materials, to make cooling pipes to improve heat transfer efficiency.

[0040] S3. Install cooling medium circulation system;

[0041] Set up a cooling medium storage tank to ensure that its capacity can meet the cooling needs. The storage tank should be equipped with a temperature sensor and a liquid level sensor to monitor the temperature and liquid level of the cooling medium in real time. Install a pump and choose an adjustable flow pump to adjust the flow of the cooling medium according to different cooling needs. Install a control valve to control the flow direction and flow of the cooling medium to ensure that the cooling medium can flow in the cooling system according to the predetermined path;

[0042] S4, preparation before die casting;

[0043] Check whether the various components of the cooling structure are firmly installed and whether there is enough cooling medium in the cooling medium storage tank. According to the material and process requirements of the automotive parts, determine the type of cooling medium such as water, oil, etc., as well as the initial temperature and flow rate;

[0044] S5, cooling during die casting;

[0045] When the die-casting mold is closed, the cooling medium circulation system is started immediately. The pump draws the cooling medium from the storage tank and sends it into the cooling pipe. According to the shape and size of the die-casting parts, the flow rate and temperature of the cooling medium are adjusted through the control valve to achieve uniform cooling. For parts with complex shapes, the flow rate of the cooling medium can be appropriately increased to improve the cooling efficiency. The temperature changes of the die-casting parts are monitored in real time. Temperature sensors can be installed on the die-casting mold, or the temperature of the parts can be monitored by equipment such as infrared thermometers. When the temperature reaches the set value, the flow rate and temperature of the cooling medium are adjusted according to the actual situation to keep the temperature of the die-casting parts within a reasonable range;

[0046] S6, treatment before demoulding;

[0047] Before the die-cast parts are about to be demolded, the cooling medium circulation system is turned off to allow the die-cast parts to cool naturally in the mold for a period of time. The natural cooling time is determined according to the size and shape of the die-cast parts, generally ranging from a few minutes to tens of minutes. Natural cooling can make the temperature of the die-cast parts more uniform, improve the strength and stability of the parts, and reduce deformation and cracks.

[0048] S7. Maintenance of cooling system;

[0049] During the die-casting production process, regularly check the various components of the cooling system, such as whether the cooling pipes are blocked, whether the pumps and control valves are working properly, etc., and regularly replace the cooling medium to ensure the cooling effect. According to the type and usage of the cooling medium, determine the replacement cycle, which generally ranges from several months to one year. Calibrate the temperature sensor and liquid level sensor to ensure that their measurement is accurate and reliable.

[0050] Working principle: The cooling chamber is set inside the die-casting mold and in direct contact with the die-casting parts. Its function is to quickly absorb the heat generated by the die-casting parts during the die-casting process and provide a basis for the subsequent cooling process. The shape and size of the cooling chamber are designed according to the specific shape and size of the die-casting parts to ensure maximum contact with the parts and improve heat transfer efficiency. The cooling pipes are distributed in the cooling chamber in a mesh structure. This design increases the contact area between the cooling medium and the die-casting parts, so that heat can be transferred from the parts to the cooling medium more quickly. The cooling pipes are usually made of materials with good thermal conductivity, such as copper, aluminum and other metals. When the cooling medium flows in the pipe, the heat is transferred to the cooling medium through the pipe wall, from In order to cool the die-cast parts, the cooling medium storage tank is used to store the cooling medium, which is usually a liquid with good thermal conductivity such as water or oil. The capacity of the storage tank should be designed according to the needs of die-casting production to ensure that it can meet the cooling requirements of continuous production. The function of the pump is to extract the cooling medium from the storage tank and deliver it to the cooling pipe at a certain pressure and flow rate. The adjustable flow pump can adjust the flow rate of the cooling medium according to different die-casting parts and production conditions to achieve the best cooling effect. The control valve is used to control the flow direction and flow rate of the cooling medium. By adjusting the control valve, the flow distribution of the cooling medium in the cooling pipe can be achieved to meet the cooling needs of different parts. At the same time, the control valve can also When necessary, close or open the circulation of the cooling medium to achieve precise control of the cooling process. When the die-casting mold is closed, the cooling medium circulation system is started immediately. The pump draws the cooling medium from the storage tank and sends it into the cooling pipe. Under the action of pressure, the cooling medium flows in the cooling pipe, exchanges heat with the die-cast parts, and absorbs the heat of the parts. According to the shape and size of the die-cast parts, adjust the flow rate and temperature of the cooling medium. For parts with complex shapes and thick walls, the flow rate of the cooling medium can be appropriately increased to improve the cooling efficiency. For some temperature-sensitive parts, the temperature of the cooling medium can be adjusted to avoid deformation or cracks of the parts due to too fast cooling. During the cooling process, the temperature sensor is used to realize Monitor the temperature changes of die-cast parts at all times. When the temperature reaches the set value, the control system will automatically adjust the flow and temperature of the cooling medium according to the actual situation to keep the temperature of the die-cast parts within a reasonable range. For example, if the temperature of the part is too high, the flow of the cooling medium can be increased or its temperature can be lowered. If the temperature of the part is too low, the flow of the cooling medium can be appropriately reduced or its temperature can be increased. Before the die-cast parts are about to be demolded, the cooling medium circulation system is turned off to allow the die-cast parts to cool naturally in the mold for a period of time. The purpose of natural cooling is to make the temperature of the parts more uniform and improve the strength and stability of the parts. At the same time, natural cooling can also reduce the internal stress of the parts caused by too rapid cooling, and reduce the risk of deformation and cracks in the parts.

[0051] Embodiment 1:

[0052] S1. Design cooling chamber;

[0053] According to the shape and size of the automotive parts, plan the position and size of the cooling cavity inside the die-casting mold to ensure that the cooling cavity can fully contact the die-casting parts to achieve efficient heat transfer, and consider the sealing of the cooling cavity to prevent leakage of the cooling medium;

[0054] S2. Arrange cooling pipes;

[0055] Lay cooling pipes in a mesh structure in the cooling cavity. The layout of the pipes should cover the entire cooling cavity as evenly as possible to ensure uniform cooling. Choose materials with good thermal conductivity, such as copper, aluminum and other metal materials, to make cooling pipes to improve heat transfer efficiency.

[0056] S3. Install cooling medium circulation system;

[0057] Set up a cooling medium storage tank to ensure that its capacity can meet the cooling needs. The storage tank should be equipped with a temperature sensor and a liquid level sensor to monitor the temperature and liquid level of the cooling medium in real time. Install a pump and choose an adjustable flow pump to adjust the flow of the cooling medium according to different cooling needs. Install a control valve to control the flow direction and flow of the cooling medium to ensure that the cooling medium can flow in the cooling system according to the predetermined path;

[0058] S4, preparation before die casting;

[0059] Check whether the various components of the cooling structure are firmly installed and whether there is enough cooling medium in the cooling medium storage tank. According to the material and process requirements of the automotive parts, determine the type of cooling medium such as water, oil, etc., as well as the initial temperature and flow rate;

[0060] S5, cooling during die casting;

[0061] When the die-casting mold is closed, the cooling medium circulation system is started immediately. The pump draws the cooling medium from the storage tank and sends it into the cooling pipe. According to the shape and size of the die-casting parts, the flow rate and temperature of the cooling medium are adjusted through the control valve to achieve uniform cooling. For parts with complex shapes, the flow rate of the cooling medium can be appropriately increased to improve the cooling efficiency. The temperature changes of the die-casting parts are monitored in real time. Temperature sensors can be installed on the die-casting mold, or the temperature of the parts can be monitored by equipment such as infrared thermometers. When the temperature reaches the set value, the flow rate and temperature of the cooling medium are adjusted according to the actual situation to keep the temperature of the die-casting parts within a reasonable range;

[0062] S6, treatment before demoulding;

[0063] Before the die-cast parts are about to be demolded, the cooling medium circulation system is turned off to allow the die-cast parts to cool naturally in the mold for a period of time. The natural cooling time is determined according to the size and shape of the die-cast parts, generally ranging from a few minutes to tens of minutes. Natural cooling can make the temperature of the die-cast parts more uniform, improve the strength and stability of the parts, and reduce deformation and cracks.

[0064] S7. Maintenance of cooling system;

[0065] During the die-casting production process, regularly check the various components of the cooling system, such as whether the cooling pipes are blocked, whether the pumps and control valves are working properly, etc., and regularly replace the cooling medium to ensure the cooling effect. According to the type and usage of the cooling medium, determine the replacement cycle, which generally ranges from several months to one year. Calibrate the temperature sensor and liquid level sensor to ensure that their measurement is accurate and reliable.

[0066] Working principle: The cooling chamber is set inside the die-casting mold and in direct contact with the die-casting parts. Its function is to quickly absorb the heat generated by the die-casting parts during the die-casting process and provide a basis for the subsequent cooling process. The shape and size of the cooling chamber are designed according to the specific shape and size of the die-casting parts to ensure maximum contact with the parts and improve heat transfer efficiency. The cooling pipes are distributed in the cooling chamber in a mesh structure. This design increases the contact area between the cooling medium and the die-casting parts, so that heat can be transferred from the parts to the cooling medium more quickly. The cooling pipes are usually made of materials with good thermal conductivity, such as copper, aluminum and other metals. When the cooling medium flows in the pipe, the heat is transferred to the cooling medium through the pipe wall, from In order to cool the die-cast parts, the cooling medium storage tank is used to store the cooling medium, which is usually a liquid with good thermal conductivity such as water or oil. The capacity of the storage tank should be designed according to the needs of die-casting production to ensure that it can meet the cooling requirements of continuous production. The function of the pump is to extract the cooling medium from the storage tank and deliver it to the cooling pipe at a certain pressure and flow rate. The adjustable flow pump can adjust the flow rate of the cooling medium according to different die-casting parts and production conditions to achieve the best cooling effect. The control valve is used to control the flow direction and flow rate of the cooling medium. By adjusting the control valve, the flow distribution of the cooling medium in the cooling pipe can be achieved to meet the cooling needs of different parts. At the same time, the control valve can also When necessary, close or open the circulation of the cooling medium to achieve precise control of the cooling process. When the die-casting mold is closed, the cooling medium circulation system is started immediately. The pump draws the cooling medium from the storage tank and sends it into the cooling pipe. Under the action of pressure, the cooling medium flows in the cooling pipe, exchanges heat with the die-cast parts, and absorbs the heat of the parts. According to the shape and size of the die-cast parts, adjust the flow rate and temperature of the cooling medium. For parts with complex shapes and thick walls, the flow rate of the cooling medium can be appropriately increased to improve the cooling efficiency. For some temperature-sensitive parts, the temperature of the cooling medium can be adjusted to avoid deformation or cracks of the parts due to too fast cooling. During the cooling process, the temperature sensor is used to realize Monitor the temperature changes of die-cast parts at all times. When the temperature reaches the set value, the control system will automatically adjust the flow and temperature of the cooling medium according to the actual situation to keep the temperature of the die-cast parts within a reasonable range. For example, if the temperature of the part is too high, the flow of the cooling medium can be increased or its temperature can be lowered. If the temperature of the part is too low, the flow of the cooling medium can be appropriately reduced or its temperature can be increased. Before the die-cast parts are about to be demolded, the cooling medium circulation system is turned off to allow the die-cast parts to cool naturally in the mold for a period of time. The purpose of natural cooling is to make the temperature of the parts more uniform and improve the strength and stability of the parts. At the same time, natural cooling can also reduce the internal stress of the parts caused by too rapid cooling, and reduce the risk of deformation and cracks in the parts.

[0067] Taking the die casting of an automobile engine block as an example, the cooling structure and cooling method of the present invention are adopted. First, the layout of the cooling cavity and the cooling pipeline is designed according to the shape and size of the engine block. During the die casting process, the cooling medium circulation system is started to make the cooling medium flow in the cooling pipeline. By adjusting the flow rate and temperature of the cooling medium, uniform cooling of the engine block is achieved. The temperature change of the engine block is monitored in real time. When the temperature reaches the set value, the flow rate and temperature of the cooling medium are adjusted to keep the temperature of the engine block within a reasonable range. Before the engine block is demolded, the cooling medium circulation system is closed to allow the engine block to cool naturally in the mold for a period of time to improve the strength and stability of the engine block.

[0068] Embodiment 2:

[0069] S1. Design cooling chamber;

[0070] According to the shape and size of the automotive parts, plan the position and size of the cooling cavity inside the die-casting mold to ensure that the cooling cavity can fully contact the die-casting parts to achieve efficient heat transfer, and consider the sealing of the cooling cavity to prevent leakage of the cooling medium;

[0071] S2. Arrange cooling pipes;

[0072] Lay cooling pipes in a mesh structure in the cooling cavity. The layout of the pipes should cover the entire cooling cavity as evenly as possible to ensure uniform cooling. Choose materials with good thermal conductivity, such as copper, aluminum and other metal materials, to make cooling pipes to improve heat transfer efficiency.

[0073] S3. Install cooling medium circulation system;

[0074] Set up a cooling medium storage tank to ensure that its capacity can meet the cooling needs. The storage tank should be equipped with a temperature sensor and a liquid level sensor to monitor the temperature and liquid level of the cooling medium in real time. Install a pump and choose an adjustable flow pump to adjust the flow of the cooling medium according to different cooling needs. Install a control valve to control the flow direction and flow of the cooling medium to ensure that the cooling medium can flow in the cooling system according to the predetermined path;

[0075] S4, preparation before die casting;

[0076] Check whether the various components of the cooling structure are firmly installed and whether there is enough cooling medium in the cooling medium storage tank. According to the material and process requirements of the automotive parts, determine the type of cooling medium such as water, oil, etc., as well as the initial temperature and flow rate;

[0077] S5, cooling during die casting;

[0078] When the die-casting mold is closed, the cooling medium circulation system is started immediately. The pump draws the cooling medium from the storage tank and sends it into the cooling pipe. According to the shape and size of the die-casting parts, the flow rate and temperature of the cooling medium are adjusted through the control valve to achieve uniform cooling. For parts with complex shapes, the flow rate of the cooling medium can be appropriately increased to improve the cooling efficiency. The temperature changes of the die-casting parts are monitored in real time. Temperature sensors can be installed on the die-casting mold, or the temperature of the parts can be monitored by equipment such as infrared thermometers. When the temperature reaches the set value, the flow rate and temperature of the cooling medium are adjusted according to the actual situation to keep the temperature of the die-casting parts within a reasonable range;

[0079] S6, treatment before demoulding;

[0080] Before the die-cast parts are about to be demolded, the cooling medium circulation system is turned off to allow the die-cast parts to cool naturally in the mold for a period of time. The natural cooling time is determined according to the size and shape of the die-cast parts, generally ranging from a few minutes to tens of minutes. Natural cooling can make the temperature of the die-cast parts more uniform, improve the strength and stability of the parts, and reduce deformation and cracks.

[0081] S7. Maintenance of cooling system;

[0082] During the die-casting production process, regularly check the various components of the cooling system, such as whether the cooling pipes are blocked, whether the pumps and control valves are working properly, etc., and regularly replace the cooling medium to ensure the cooling effect. According to the type and usage of the cooling medium, determine the replacement cycle, which generally ranges from several months to one year. Calibrate the temperature sensor and liquid level sensor to ensure that their measurement is accurate and reliable.

[0083] Working principle: The cooling chamber is set inside the die-casting mold and in direct contact with the die-casting parts. Its function is to quickly absorb the heat generated by the die-casting parts during the die-casting process and provide a basis for the subsequent cooling process. The shape and size of the cooling chamber are designed according to the specific shape and size of the die-casting parts to ensure maximum contact with the parts and improve heat transfer efficiency. The cooling pipes are distributed in the cooling chamber in a mesh structure. This design increases the contact area between the cooling medium and the die-casting parts, so that heat can be transferred from the parts to the cooling medium more quickly. The cooling pipes are usually made of materials with good thermal conductivity, such as copper, aluminum and other metals. When the cooling medium flows in the pipe, the heat is transferred to the cooling medium through the pipe wall, from In order to cool the die-cast parts, the cooling medium storage tank is used to store the cooling medium, which is usually a liquid with good thermal conductivity such as water or oil. The capacity of the storage tank should be designed according to the needs of die-casting production to ensure that it can meet the cooling requirements of continuous production. The function of the pump is to extract the cooling medium from the storage tank and deliver it to the cooling pipe at a certain pressure and flow rate. The adjustable flow pump can adjust the flow rate of the cooling medium according to different die-casting parts and production conditions to achieve the best cooling effect. The control valve is used to control the flow direction and flow rate of the cooling medium. By adjusting the control valve, the flow distribution of the cooling medium in the cooling pipe can be achieved to meet the cooling needs of different parts. At the same time, the control valve can also When necessary, close or open the circulation of the cooling medium to achieve precise control of the cooling process. When the die-casting mold is closed, the cooling medium circulation system is started immediately. The pump draws the cooling medium from the storage tank and sends it into the cooling pipe. Under the action of pressure, the cooling medium flows in the cooling pipe, exchanges heat with the die-cast parts, and absorbs the heat of the parts. According to the shape and size of the die-cast parts, adjust the flow rate and temperature of the cooling medium. For parts with complex shapes and thick walls, the flow rate of the cooling medium can be appropriately increased to improve the cooling efficiency. For some temperature-sensitive parts, the temperature of the cooling medium can be adjusted to avoid deformation or cracks of the parts due to too fast cooling. During the cooling process, the temperature sensor is used to realize Monitor the temperature changes of die-cast parts at all times. When the temperature reaches the set value, the control system will automatically adjust the flow and temperature of the cooling medium according to the actual situation to keep the temperature of the die-cast parts within a reasonable range. For example, if the temperature of the part is too high, the flow of the cooling medium can be increased or its temperature can be lowered. If the temperature of the part is too low, the flow of the cooling medium can be appropriately reduced or its temperature can be increased. Before the die-cast parts are about to be demolded, the cooling medium circulation system is turned off to allow the die-cast parts to cool naturally in the mold for a period of time. The purpose of natural cooling is to make the temperature of the parts more uniform and improve the strength and stability of the parts. At the same time, natural cooling can also reduce the internal stress of the parts caused by too rapid cooling, and reduce the risk of deformation and cracks in the parts.

[0084] The cooling structure and cooling method of the present invention are also used for die-casting of automobile transmission housings. The design of the cooling cavity and cooling pipe is optimized according to the shape and size of the transmission housing. During the die-casting process, the flow rate and temperature of the cooling medium are strictly controlled to ensure the cooling effect of the transmission housing. By real-time monitoring of temperature changes, the cooling parameters are adjusted in time to ensure the die-casting quality.

[0085] Although the embodiments of the present invention have been shown and described, it is understandable to those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the embodiments as needed without any creative contribution. However, as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A cooling structure and cooling method based on die-casting of automobile parts, characterized in that: The following steps are involved: S1. Design the cooling cavity: According to the shape and size of the automotive parts, the position and size of the cooling cavity inside the die-casting mold should be reasonably planned to ensure that the cooling cavity can fit closely to the key parts of the parts to achieve efficient heat transfer. Consider the sealing of the cooling cavity and use appropriate sealing materials and structures to prevent leakage of the cooling medium. S2. Install cooling pipes: Choose materials with good thermal conductivity, such as copper, aluminum alloy, etc. to make cooling pipes. Distribute the cooling pipes in a mesh structure in the cooling cavity, and ensure that the spacing between the pipes is uniform to ensure uniform cooling. Use professional connection techniques, such as welding or threaded connection, to ensure that the connection of the cooling pipes is firm and reliable, and will not loosen or leak during use; S3. Configure cooling medium circulation system: Set up cooling medium storage tank. The capacity of the storage tank should be reasonably selected according to the scale of die-casting production and cooling requirements. Install liquid level gauge and temperature sensor on the storage tank to monitor the liquid level and temperature of the cooling medium in real time. Select a suitable pump to ensure that it can provide sufficient pressure and flow so that the cooling medium flows smoothly in the cooling pipeline. Install control valve to adjust the flow and direction of the cooling medium. S4. Preparation before die casting: Check whether the various components of the cooling structure are firmly installed, whether the cooling pipes are unobstructed, whether the cooling medium in the cooling medium storage tank is sufficient and meets the requirements, and determine the appropriate cooling medium type, such as water, oil or special coolant, according to the material and process requirements of the automotive parts, and set the initial cooling medium temperature and flow rate; S5. Cooling during die casting: When the die casting mold is closed, the cooling medium circulation system is started immediately. The pump draws the cooling medium from the storage tank, adjusts the flow through the control valve, and then sends it into the cooling pipe. The cooling medium flows in the cooling pipe, exchanges heat with the die casting parts, absorbs the heat of the parts, and continuously adjusts the flow and temperature of the cooling medium according to the shape and size of the parts and the temperature changes of the parts monitored in real time. An intelligent control system can be used to automatically adjust the cooling parameters according to the preset temperature curve and cooling strategy to achieve the best cooling effect. S6. Treatment before demoulding: Before the die-cast parts are demoulded, gradually reduce the flow of cooling medium to allow the parts to cool naturally in the mold for a period of time. Natural cooling can make the temperature of the parts more uniform and reduce the internal stress caused by too fast cooling. Determine the natural cooling time according to the specific conditions of the parts. Generally speaking, for large parts or parts with complex shapes, the natural cooling time may need to be longer; S7. Maintenance and care of the cooling system: During the die-casting production process, regularly check the various components of the cooling structure, such as whether the cooling pipes are blocked, whether the pumps and control valves are working properly, whether the temperature sensors and liquid level gauges are accurate, etc., and regularly replace the cooling medium to ensure its cooling performance. According to the type and usage of the cooling medium, determine a reasonable replacement cycle, clean and maintain the cooling system, remove dirt and impurities in the cooling pipes, and ensure the efficient operation of the cooling system.

2. The cooling structure and cooling method based on die-casting of automobile parts according to claim 1, characterized in that: The shape and size of the cooling cavity are designed according to the shape and size of the die-casting parts, and the material of the cooling pipe is a metal material with good thermal conductivity.

3. The cooling structure and cooling method based on die-casting of automobile parts according to claim 1, characterized in that: The cooling medium storage tank is provided with a temperature sensor and a liquid level sensor. The pump is a flow-adjustable pump, and the type of the pump can be selected according to specific needs, such as a centrifugal pump, a plunger pump, etc.

4. The cooling structure and cooling method based on die-casting of automobile parts according to claim 1, characterized in that: The control valve can be controlled manually or automatically so as to be accurately adjusted according to actual conditions. The control valve is used to control the flow rate and flow direction of the cooling medium.

5. The cooling structure and cooling method based on die-casting of automobile parts according to claim 1, characterized in that: The cooling cavity is arranged inside the die-casting mold and is in direct contact with the die-casting parts. The cooling pipelines are distributed in the cooling cavity and present a mesh structure. The cooling medium circulation system includes a cooling medium storage tank, a pump and a control valve.

6. The cooling structure and cooling method based on die-casting of automobile parts according to claim 1, characterized in that: The cooling medium is water, oil or other liquids with good thermal conductivity. The temperature setting value is determined according to the material and process requirements of the die-casting part, and the natural cooling time is determined according to the size and shape of the die-casting part.

7. The cooling structure and cooling method based on die-casting of automobile parts according to claim 1, characterized in that: The natural cooling time is divided into various situations. For large parts or parts with complex shapes, the natural cooling time needs to be longer, and for small parts or parts with regular shapes, the natural cooling time needs to be shorter.

8. The cooling structure and cooling method based on die-casting of automobile parts according to claim 1, characterized in that: The sealing material of the cooling cavity is a suitable sealing material and structure such as rubber or silica gel, and the cooling pipe is made of a material with good thermal conductivity such as copper or aluminum alloy.

9. The cooling structure and cooling method based on die-casting of automobile parts according to claim 1, characterized in that: A plurality of cooling pipes are provided, and the plurality of cooling pipes are connected by welding or threading, and the structures of the plurality of cooling pipes are consistent.

10. The cooling structure and cooling method based on die-casting of automobile parts according to claim 1, characterized in that: Check whether the cooling pipeline is blocked, whether the pump and control valve are working properly, whether the temperature sensor and liquid level meter are accurate, and whether the cooling medium has a reasonable replacement cycle.