Intelligent control aluminum alloy extrusion device and method

Abstract

The application relates to the technical field of aluminum alloy extrusion forming, and discloses an aluminum alloy extrusion device and method with intelligent control, which comprises an extrusion mechanism for extrusion forming of aluminum alloy bars, a die assembly arranged at the discharging end of the extrusion mechanism, an extrusion die for forming hollow profiles, a die temperature control system arranged on the die assembly, the die temperature control system being used for independently heating or cooling different regions of the extrusion die to adjust the temperature distribution of the die working zone, a profile cooling system arranged at the discharging side of the die assembly, the profile cooling system comprising an outer cooling unit and an inner cooling unit, and the outer cooling unit being used for cooling the outer wall of the profile formed by the extrusion die. According to the application, the hollow die mandrel is extended into the profile cavity through the spraying rod to directly spray the inner wall, and the outer ring spraying pipe is combined to eliminate the cooling blind area of the inner wall of the hollow profile, so that the cooling rates of the inner wall and the outer wall are consistent.

Description

Technical Field

[0001] This invention belongs to the field of aluminum alloy extrusion molding technology, specifically relating to an intelligently controlled aluminum alloy extrusion device and method. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the demand for multi-cavity hollow thin-walled complex cross-section aluminum profiles for battery trays is increasing. This type of profile is characterized by large differences in wall thickness (typically between 0.8mm and 3mm) and large hollow cavity cross-sectional dimensions (over 200mm). During the aluminum alloy extrusion process, the flow rate and frictional heat distribution of the metal within the die are extremely uneven, and the high-temperature profiles after extrusion require online quenching and cooling to ensure their mechanical properties and dimensional accuracy. Therefore, temperature control of the extrusion die and cooling control of the extruded profiles are crucial factors determining the profile forming quality and production efficiency.

[0003] Existing aluminum alloy extrusion equipment typically uses a split-flow combination die for extruding hollow profiles. This mainly includes an extrusion cylinder, a main plunger, a die holder, and a hollow split-flow combination die. The die is preheated as a whole by an external heating furnace before extrusion. During extrusion, the temperature is mainly maintained by the heat of metal deformation. There is a lack of active, zoned temperature control for different areas of the die working zone, and a lack of a ring-shaped cooling station after the die exit. Typically, an outer ring spray pipe is used, with nozzles evenly distributed around the inner ring to spray water or mist to quench and cool the outer wall of the freshly extruded high-temperature profile. Due to the large differences in the wall thickness of the profile cross-section, the temperature difference in the cross-section can reach over 80°C, resulting in uneven extrusion speed. This easily leads to profile twisting and excessive wall thickness. At the same time, the existing cooling structure uses external spray cooling and lacks a structure for cooling the inside of the profile, resulting in relatively slow heat dissipation inside the profile. This leads to a large difference in cooling efficiency between the outer wall and the inside, causing the cross-sectional structure to be non-level and warping in some areas. Summary of the Invention

[0004] This invention provides an intelligent control aluminum alloy extrusion device, which solves the technical problems in related technologies such as uneven temperature distribution in the working zone at the upstream die end and large and coupled differences in cooling rates between the inner and outer walls at the downstream cooling end during the extrusion process of complex cross-section hollow thin-walled profiles.

[0005] This invention provides an intelligently controlled aluminum alloy extrusion device, comprising: An extrusion mechanism is used to extrude aluminum alloy bars into shapes; A die assembly is located at the discharge end of the extrusion mechanism, and the die assembly includes an extrusion die for forming hollow profiles; The mold temperature control system is installed on the mold assembly. The mold temperature control system is used to independently heat or cool different areas of the extrusion mold in order to regulate the temperature distribution of the mold working zone. A profile cooling system is installed on the discharge side of the mold assembly. The profile cooling system includes an external cooling unit and an internal cooling unit. The external cooling unit is used to cool the outer wall of the profile formed by the extrusion mold, and the internal cooling unit is used to cool the inner wall of the profile formed by the extrusion mold. The mold temperature control system and the profile cooling system work together to control the temperature field distribution of the profile during the forming and cooling process.

[0006] In a preferred embodiment, the mold assembly includes a mold base, the extrusion mold is a hollow diversion combination mold, and the hollow diversion combination mold is installed inside the mold base.

[0007] In a preferred embodiment, the mold temperature control system includes: The heating unit, mounted on the mold base, is used to heat the hollow split-flow combination mold; A mold cooling unit is disposed inside the mold base and surrounds the hollow flow-dividing assembly mold. The mold cooling unit includes an annular cooling water jacket. The inner wall of the annular cooling water jacket is divided into multiple fan-shaped partitions, and the multiple fan-shaped partitions are distributed circumferentially and the flow rate of the cooling medium can be independently controlled.

[0008] In a preferred embodiment, the heating unit includes a ceramic support and a heating coil, the ceramic support being fixedly connected to the mold base, and the heating coil being wound around the outer wall of the ceramic support.

[0009] In a preferred embodiment, the profile cooling system further includes a temperature detection unit, which includes an external temperature measurement module for detecting the temperature of the outer wall of the profile and an internal temperature measurement module for detecting the temperature of the inner wall of the profile. The external cooling unit includes an outer ring spray pipe, on which multiple first nozzles are provided. The opening and closing of the first nozzles are independently controlled by a first solenoid valve. The internal cooling unit includes a spray bar that extends into the inner cavity of the profile. The spray bar is equipped with multiple second nozzles, and the opening and closing of the second nozzles are independently controlled by a miniature solenoid valve.

[0010] In a preferred embodiment, the internal temperature measurement module is an internal infrared probe array disposed on the internal cooling unit, and the external temperature measurement module is an external infrared temperature measurement array disposed on the external cooling unit.

[0011] In a preferred embodiment, it further includes a control cabinet, which is electrically connected to the temperature detection unit, the mold cooling unit, the first solenoid valve, and the miniature solenoid valve. The control cabinet is configured to receive signals from the temperature detection unit and independently adjust the cooling intensity of each sector in the mold cooling unit based on the signals, and to independently adjust the cooling parameters of each first nozzle and each second nozzle.

[0012] In a preferred embodiment, the internal cooling unit further includes a flange, the spray bar is fixed by the flange, and the interior of the spray bar is provided with mutually isolated partitioned pipes, the partitioned pipes including a fluid channel for supplying cooling medium to the second nozzle and an electrical channel for laying control micro solenoid valve wiring harnesses.

[0013] In a preferred embodiment, the extrusion mechanism includes a base, an extrusion cylinder slidably connected to the base, and an extruder for driving an extrusion rod to move within the extrusion cylinder.

[0014] A control method for an intelligent aluminum alloy extrusion device includes the following steps: Step 1: During the extrusion process, the temperature of different areas of the extrusion die is adjusted by the die temperature control system. Step 2: After the profile is extruded, the temperature of the inner and outer walls of the profile is monitored in real time by a temperature detection unit; Step 3: Based on the monitored temperature, independently adjust the cooling parameters of the external cooling unit and the internal cooling unit through the control cabinet to achieve synchronous cooling of the inner and outer walls of the profile.

[0015] The beneficial effects of this invention are as follows: 1. This invention uses an inner core spray rod to extend into the profile cavity without interference through the natural inner hole channel of the hollow mold core shaft to directly spray the inner wall. Combined with the outer ring spray pipe, it completely eliminates the cooling blind zone of the inner wall of the hollow profile, making the cooling rate of the inner and outer walls more consistent, and effectively avoiding uneven cross-sectional structure and warping caused by heat stagnation of the inner wall. 2. This invention achieves online cooling by setting up a mold cooling unit, which can control the temperature of the hollow split-flow combination mold within an ideal range, thereby allowing the extruder to use a higher extrusion speed when extruding aluminum alloy bars, directly improving production efficiency. Through the cooperation of the fan-shaped segmented induction coil and the partitioned cooling water jacket, active heat dissipation is achieved in the thin-walled area at the mold position, eliminating the problems of twisting and wall thickness deviation caused by uneven extrusion speed.

[0016] 3. By setting up a heating unit to maintain the aluminum alloy bar at a high temperature during processing, it prevents the cooled aluminum alloy bar from being fed into the hollow diverting die at high pressure, which could cause deformation of the product surface after forming. This ensures that the extruder can move smoothly when extruding the aluminum alloy bar in the extrusion cylinder, thereby improving the product success rate. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a front view sectional structural schematic diagram of the present invention.

[0019] Figure 3This is the invention Figure 2 Enlarged structural diagram at point A in the middle.

[0020] Figure 4 This is the invention Figure 2 Enlarged structural diagram at point B.

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the left view of the present invention.

[0022] Figure 6 This is a schematic diagram of the mold base structure of the present invention.

[0023] Figure 7 This is a schematic diagram of the structural cooling unit of the present invention.

[0024] Figure 8 This is a schematic diagram of the outer cooling mechanism of the present invention.

[0025] Figure 9 This is a schematic diagram of the cooling unit structure of the present invention.

[0026] Figure 10 This is a schematic diagram of the cooling unit and hollow flow divider combination module structure of the present invention.

[0027] In the diagram: 1. Base; 2. Extrusion cylinder; 3. Extruder; 4. Mold base; 5. Hollow split-flow combination mold; 6. Armored thermocouple; 7. Heating unit; 71. Ceramic support; 72. Heating coil; 8. Control cabinet; 9. Mold cooling unit; 91. Annular cooling water jacket; 92. Fan-shaped partition; 93. Water outlet pipe; 94. Connecting water hose; 95. Water pipe; 96. Water inlet pipe; 10. External cooling unit; 101. Outer ring spray pipe; 102. First nozzle; 103. First solenoid valve; 104. Infrared temperature measurement array; 11. Internal cooling unit; 111. Flange; 112. Spray bar; 113. Second nozzle; 114. Dividing pipe; 115. Internal infrared probe array. Detailed Implementation

[0028] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0029] Example 1 like Figure 1-10 As shown, an intelligent controlled aluminum alloy extrusion device includes an extrusion mechanism, a die assembly, a die temperature control system, and a profile cooling system; The extrusion mechanism serves as the foundation for power and forming, including a base 1, an extrusion cylinder 2 slidably connected to the base 1, and an extruder 3. The extruder 3 is used to drive the extrusion rod to move within the extrusion cylinder 2, thereby extruding the heated aluminum alloy rod under high pressure. The die assembly is located at the discharge end of the extrusion mechanism. The die assembly includes a die base 4 and an extrusion die installed inside the die base 4. In this embodiment, the extrusion die is a hollow diversion combination die 5, which is used to form aluminum alloy rods into hollow profiles. The mold temperature control system in this device is installed on the mold assembly. Its core function is to independently heat or cool different areas of the extrusion mold (such as the mold working zone area corresponding to the thin-walled area and the thick-walled area of ​​the profile). It should be noted that the mold temperature control system includes a heating unit 7 and a mold cooling unit 9. The heating unit 7 is disposed on the mold base 4 and is used to actively heat the hollow flow-dividing combination mold. In this embodiment, the heating unit 7 includes a ceramic support 71 fixedly connected to the mold base 4 and a heating coil 72 wound around the outer wall of the ceramic support 71. By means of induction heating, the temperature of a specific area of ​​the mold can be quickly increased to prevent heat loss caused by excessive metal flow.

[0030] The mold cooling unit 9 is located inside the mold base 4 and surrounds the hollow flow-dividing combination mold 5. The mold cooling unit 9 includes an annular cooling water jacket 91. The inner wall of the annular cooling water jacket 91 is divided into multiple circumferentially distributed fan-shaped partitions 92. Each fan-shaped partition 92 can independently control the flow rate of the cooling medium, so that the mold temperature control system can implement zone control. When the temperature of a certain area of ​​the mold (such as the thick wall of the corresponding profile) is detected to be too high, the cooling water flow rate of that fan-shaped partition 92 is increased separately. When the temperature of a certain area (such as the thin wall of the corresponding profile) is too low, causing difficulty in metal flow, the heating unit 7 is used for heat supplementation.

[0031] In order to achieve uniform cooling of the profile after extrusion, a profile cooling system is also provided. The system is located on the discharge side of the mold assembly and includes an external cooling unit 10 and an internal cooling unit 11. In one embodiment of the present invention, the external cooling unit 10 is used to cool the outer wall of the profile formed by the extrusion die, and includes an outer ring spray pipe 101 and a plurality of first nozzles 102 disposed thereon; the opening and closing of the first nozzles 102 are independently controlled by a first solenoid valve 103, thereby realizing differentiated spraying of the outer wall of the profile in different directions. In one embodiment of the present invention, the internal cooling unit 11 is used to cool the inner wall of the profile formed by the extrusion die. The internal cooling unit 11 includes a spray rod 112 extending into the inner cavity of the profile. The spray rod 112 is provided with a plurality of second nozzles 113. The opening and closing of the second nozzles 113 are independently controlled by a micro solenoid valve.

[0032] The above-mentioned cooperation between the inner cooling unit 11 and the outer cooling unit 10 eliminates the cooling blind zone of the inner wall of the hollow profile, making the cooling rate of the inner and outer walls more consistent. Furthermore, in order to achieve intelligent closed-loop control, the profile cooling system also includes a temperature detection unit; the temperature detection unit includes an external temperature measurement module for detecting the temperature of the outer wall of the profile and an internal temperature measurement module for detecting the temperature of the inner wall of the profile. In this embodiment, the internal temperature measurement module is an internal infrared probe array 115 disposed on the internal cooling unit 11, and the external temperature measurement module is an external infrared temperature measurement array 104 disposed on the external cooling unit 10. The device also includes a control cabinet 8 (i.e., a control unit), which is electrically connected to the temperature detection unit, the mold cooling unit 9, the first solenoid valve 103, and the miniature solenoid valve.

[0033] Control cabinet 8 executes the following logic: 1. Receive real-time temperature signals from the inner infrared probe array 115 and the outer infrared temperature measurement array 104; Second, based on this signal, the cooling intensity of each sector 92 in the mold cooling unit 9 is independently adjusted (e.g., the opening of the water inlet valve is adjusted) to balance the mold temperature field; Third, independently adjust the cooling parameters (such as opening duration and frequency) of each first nozzle 102 and each second nozzle 113 to match the actual heat dissipation requirements of the inner and outer walls of the profile.

[0034] It should be noted that the internal cooling unit 11 includes a flange 111, and the spray bar 112 is fixed to the discharge end of the hollow diversion combination mold through the flange 111. To solve the pipeline layout problem, the spray bar 112 is equipped with mutually isolated dividing pipes 114. The dividing pipes 114 divide the internal space into a fluid channel for delivering cooling medium to the second nozzle 113 and an electrical channel for laying the wiring harness for controlling the miniature solenoid valve, thus avoiding interference from external pipelines and ensuring the compactness of the internal cooling structure.

[0035] In one embodiment of the present invention, the connection and positional relationships between the various structures are given, including a base 1 and an extrusion cylinder 2, which are slidably connected inside the base 1; The extruder 3 is installed inside the base 1 and is used to extrude the aluminum alloy rods inside the extrusion cylinder 2 during operation. Mold base 4 is installed on the left side of base 1. Hollow diversion combination mold 5 is installed inside mold base 4. Hollow diversion combination mold 5 is divided into diversion bridge, mold core and template. Control cabinet 8 is fixedly connected to the front side of mold base 4. The mold base 4 is equipped with an external cooling unit 10 and an internal cooling unit 11. The external cooling unit 10 includes a first nozzle 102, which sprays the outer wall of the finished product to cool it down. The internal cooling unit 11 includes a second nozzle 113, which sprays the inside of the finished product to cool it down. Specifically, the extruder 3 extrudes the aluminum alloy rod inside the extrusion cylinder 2 into contact with the hollow diversion mold 5 on the surface of the mold base 4. The aluminum alloy rod processed by the hollow diversion mold 5 enters the cooling area composed of the outer cooling unit 10 and the inner cooling unit 11. The outer wall and inner wall of the formed product are simultaneously cooled by the first nozzle 102 and the second nozzle 113, respectively, thereby ensuring that the device cools the product quickly and preventing the product from deforming in subsequent processes due to uneven heating.

[0036] A heating unit 7 is connected to the side of the mold base 4 near the extruder 3. The heating unit 7 includes multiple ceramic supports 71 fixedly connected to the side of the mold base 4 near the extruder 3. A heating coil 72 is wound around the outer wall of the ceramic supports 71. Annular grooves matching the heating unit 7 are evenly distributed on the side of the mold base 4 near the extruder 3. Specifically, the heating unit 7 is installed inside the annular groove on the side of the die holder 4 near the extruder. The spacing between adjacent ceramic supports 71 and heating coils 72 is the same, thereby ensuring that the heating unit 7 is heated evenly when processing aluminum alloy bars.

[0037] The mold base 4 is equipped with a mold cooling unit 9. The position of the mold cooling unit 9 corresponds to the hollow flow-dividing combination mold 5. The mold cooling unit 9 includes an annular cooling water jacket 91, which is fixedly connected to the inner wall of the mold base 4. The inner wall of the annular cooling water jacket 91 is evenly distributed with fan-shaped partitions 92. The outer wall of the fan-shaped partition 92 away from the extruder 3 is raised and fixedly connected with a water outlet pipe 93. The outer wall of the fan-shaped partition 92 near the extruder 3 is raised and fixedly connected with a water inlet pipe 96. The outer walls of the six water outlet pipes 93 or water inlet pipes 96 are respectively fixedly connected with connecting water hoses 94. A solenoid valve is provided between the connecting water hose 94 and the water inlet pipe 96. The outer wall of the connecting water hose 94 is fixedly connected with a water pipe 95, which penetrates to the inner wall of the connecting water hose 94. Specifically, when the cooling liquid enters the connecting water strip 94 on the same side through the right water pipe 95, it fills the space inside the connecting water strip 94 with liquid. A one-way valve is installed between the right water pipe 95 and the connecting water strip 94, so the cooling liquid can only enter the right connecting water strip 94 through the right water pipe 95 for storage. When the single sector 92 inside the annular cooling water jacket 91 is full of cooling liquid, when the inlet pipe 96 receives the instruction to continue filling with water, the heated liquid enters the connecting water strip on the left through the outlet pipe 93, and then is discharged through the left water pipe 95 for subsequent processing and use. By dividing the molds into multiple sector 92 for classified cooling treatment of molds of different thicknesses, it is possible to ensure that molds of different thicknesses are at the required temperature, thereby ensuring the processing speed and success rate of the device. By setting up the mold cooling unit 9 to achieve online cooling, the temperature of the hollow split-flow combination mold 5 is controlled within the ideal range, allowing the extruder 3 to use a higher extrusion speed when extruding aluminum alloy bars, thereby improving production efficiency.

[0038] An external cooling unit 10 is connected to the inner wall of the mold base 4. The external cooling unit 10 includes an outer ring spray pipe 101 fixedly connected to the inner wall of the mold base 4. The outer ring spray pipe 101 is located on the side of the mold cooling unit 9 away from the extruder 3. A plurality of first nozzles 102 are fixedly connected inside the outer ring spray pipe 101. The plurality of first nozzles 102 are spaced at the same interval. A first solenoid valve 103 is fixedly connected between the first nozzles 102 and the outer ring spray pipe 101. An infrared temperature measuring array 104 is fixedly connected on the side of the outer ring spray pipe 101 away from the first solenoid valve. Specifically, the outer ring spray pipe 101 of the external cooling unit 10 is filled with cooling liquid, and when the first solenoid valve 103 opens the first nozzle 102 to spray liquid, the first nozzle 102 on the upper side will not spray air, ensuring the accuracy of the structure during use.

[0039] The mold base 4 is internally connected to an internal cooling unit 11, which includes a flange 111. The flange 111 is fixedly connected to the end of the hollow diversion mold 5 away from the extruder 3. A spray rod 112 is fixedly connected to the side of the flange 111 away from the hollow diversion mold 5. Multiple sets of second nozzles 113 are fixedly connected to the outer wall of the spray rod 112. The two second nozzles 113 are spaced at the same interval. The positions of the second nozzles 113 and the first nozzles 102 are corresponding. A dividing pipe 114 is provided inside the spray rod 112. An internal infrared probe array 115 is fixedly connected between the outer wall of the spray rod 112 and the flange 111. Specifically, the connecting pipes and lines located inside the dividing pipe 114 are placed inside the mandrel in the hollow diversion combination mold 5 via the flange 111. They are led out through the protruding part that the aluminum alloy rod inside the hollow diversion combination mold 5 does not pass through, and then connected to the external main water source or control system. This ensures that the spray bar 112 of the internal cooling unit 11 has a liquid supply during use, and that the internal infrared probe array 115 connected to the surface of the flange 111 has a channel to connect with the outside world, so as to transmit the detection signal. The structure of the internal cooling unit 11 does not affect the processing work of the aluminum alloy rod when the extruder 3 extrudes the aluminum alloy rod inside the extrusion cylinder 2 and the aluminum alloy rod exits through the hollow diversion combination mold 5. This ensures that there is no conflict between the operating structures and ensures smooth operation of the structure.

[0040] Example 2 This embodiment provides a control method for an aluminum alloy extrusion device based on the above-mentioned intelligent control, including the following steps: Step 1: During the extrusion process, the mold temperature control system adjusts the temperature of different areas of the extrusion mold 5 according to the preset process or real-time feedback. It should be noted that, specifically, the high-temperature area of ​​the mold is cooled in a targeted manner by the fan-shaped partition 92 of the mold cooling unit 9, or the low-temperature area is heated by the heating unit 7, so as to ensure that the flow rate of metal in the working zone of the mold is uniform and to achieve the temperature regulation of the mold partition. Step 2: After the profile is extruded, the temperature distribution of the inner and outer walls of the profile is monitored in real time by the temperature detection unit (inner infrared probe array 115 and outer infrared temperature measurement array 104), and the temperature signal is transmitted to the control cabinet 8. It should be noted that the purpose is to achieve real-time monitoring of profile temperature; Step 3: Based on the monitored temperature data, the control cabinet 8 calculates the optimal cooling strategy through an algorithm model and independently adjusts the cooling parameters (such as the switching frequency and duty cycle of the solenoid valve) of the first nozzle 102 of the external cooling unit 10 and the second nozzle 113 of the internal cooling unit 11.

[0041] For example, when it is detected that the wall thickness on a certain side of the profile is thicker and the temperature is higher, the control cabinet 8 will increase the water spray volume of the first nozzle 102 corresponding to that side, and at the same time adjust the second nozzle 113 at the corresponding position of the inner cooling unit 11 to enhance the cooling of the inner wall. In this way, the cooling rate of the inner and outer walls and cross-sections of the profile is kept synchronized, eliminating defects such as twisting, wave and dimensional deviation caused by uneven cooling.

[0042] It should be noted that the purpose is to achieve synchronous cooling control of the inner and outer walls. Working principle of the invention: When using this device, the heated aluminum alloy rod is fed into the extrusion cylinder 2 via the feeding mechanism. The main hydraulic cylinder of the extruder 3 pushes the extrusion rod into the extrusion cylinder 2 to extrude the aluminum alloy rod. As the extruder 3 pushes the aluminum alloy rod to move inside the extrusion cylinder 2, it contacts the structure of the hollow diversion die 5. The aluminum alloy rod is heated by the heating coils 72 wrapped around the ceramic support 71 in the heating unit 7 surrounding the hollow diversion die 5. Six sets of heating coils 72 are evenly arranged around the hollow diversion die 5 to ensure that the aluminum alloy rod is kept at a constant high temperature in all directions within the heating area when the heating coils 72 heat the aluminum alloy rod, thus maintaining the temperature of the aluminum alloy rod. During the extrusion process of the extruder 3, the temperature is monitored by the armored thermocouple 6 to control the temperature of the heating unit 7. The extruder 3 continues to extrude the aluminum alloy rod, causing the aluminum alloy rod after passing through the hollow diversion die 5 to deform into a vehicle shape. After completing the extrusion processing of aluminum alloy bars, the extruder 3 needs to be reset, and then the feeding unit needs to be controlled to feed the aluminum alloy bars into the extrusion cylinder 2 for processing. (This ensures that the aluminum alloy bars are kept at the required high temperature when in contact with the hollow diversion die 5, preventing damage to the surface of the structure caused by the lower temperature aluminum alloy bars during extrusion processing. It also ensures that the extruder 3 moves smoothly when extruding the aluminum alloy bars into the hollow diversion die 5, and that the profile of the hollow diversion die 5 maintains a flat surface, thereby ensuring processing accuracy and product success rate. The heating unit 7 maintains the high temperature of the aluminum alloy bars during processing, preventing the cooled aluminum alloy bars from being fed into the hollow diversion die 5 with high pressure, which could cause deformation of the surface of the formed product. This ensures that the extruder 3 moves smoothly when extruding the aluminum alloy bars in the extrusion cylinder 2, thereby improving the product success rate.) This device includes a mold cooling unit 9, which comprises an annular cooling water jacket 91. The jacket is divided into sector-shaped sections 92. External cooling water is delivered through a water pipe 95 on the right side, transporting the liquid to the connecting water hose 94 on the right side. A valve controls the flow of coolant between the inlet pipe 96 and the connecting water hose 94, allowing the connecting water hose 94 to deliver coolant to the inlet pipe 96 in the corresponding sector as needed, thus determining the water volume within the sector-shaped section 92. After circulating through the inlet pipe 96, the cooling liquid in the sector-shaped section 92 of the annular cooling water jacket 91 is discharged through the outlet pipe 93 back to the connecting water hose and water pipe 95 on the left side, where it waits for further cooling. Continuing the process, (by setting up the mold cooling unit 9 to achieve online cooling, the temperature of the hollow split-flow combination mold 5 can be controlled within the ideal range, thereby allowing the extruder 3 to use a higher extrusion speed when extruding aluminum alloy bars, directly improving production efficiency. Through the cooperation of the fan-shaped segmented induction coil and the partitioned cooling water jacket, active heat dissipation is achieved in the thin-walled area at the mold position, eliminating the twisting and wall thickness deviation problems caused by uneven extrusion speed. When the thermocouple temperature in the thin-walled area is higher than the target value, the corresponding sector water jacket valve is opened to cool down and the induction power of that sector is cut off. When the temperature in the thick-walled area is lower than the target value, the induction power of the corresponding sector is increased). After the extruder 3 pushes the aluminum alloy bar through the hollow diversion mold 5, the aluminum alloy bar becomes the finished product. The finished product simultaneously contacts the inner cooling unit 11 and the outer cooling unit 10. The liquid in the inner cooling unit 11 enters the spray bar 112 through the position between the mold core and the flange 111 of the hollow diversion mold 5. It flows through one of the cooling water channels in the divided pipes 114 opened in the inner wall of the spray bar 112, and then is sprayed out through the second nozzle 113 to cool the inside of the finished product. The other divided pipe 114 is a solenoid valve wiring channel. The two pipes pass through the rear end of the hollow diversion mold 5 to the lower position and are connected to the main water source. The inner infrared probe array 115 is used for real-time detection of the profile. The internal temperature is lowered when the finished product passes through the inner cooling unit 11 on the inner wall and the outer wall passes through the outer cooling unit 10. After passing through the cooling area of ​​the outer cooling unit 10, the finished product is sprayed out by the first nozzle 102 activated by the first solenoid valve 103. The cooling liquid stored inside the outer ring spray pipe 101 is connected to the main water source through a water pump and water pipe. The sprayed cooling liquid cools the finished product (the opening time and frequency of the solenoid valves of each nozzle in the outer ring and each nozzle in the inner core are independently adjusted according to the inner and outer infrared array signals). The cooling liquid sprayed by the first nozzle 102 or the second nozzle 113 is collected and stored in a water storage tank set on the left side of the mold base for subsequent cooling treatment.

[0043] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. An intelligently controlled aluminum alloy extrusion device, characterized in that, include: An extrusion mechanism is used to extrude aluminum alloy bars into shapes; A die assembly is disposed at the discharge end of the extrusion mechanism, the die assembly including an extrusion die for forming hollow profiles; A mold temperature control system is installed on the mold assembly. The mold temperature control system is used to independently heat or cool different areas of the extrusion mold in order to adjust the temperature distribution of the mold working zone. A profile cooling system is provided on the discharge side of the mold assembly. The profile cooling system includes an outer cooling unit (10) and an inner cooling unit (11). The outer cooling unit (10) is used to cool the outer wall of the profile formed by the extrusion mold, and the inner cooling unit (11) is used to cool the inner wall of the profile formed by the extrusion mold. The mold temperature control system and the profile cooling system work together to control the temperature field distribution of the profile during the forming and cooling process.

2. The intelligent control aluminum alloy extrusion device according to claim 1, characterized in that, The mold assembly includes a mold base (4), the extrusion mold is a hollow diversion combination mold (5), and the hollow diversion combination mold (5) is installed inside the mold base (4).

3. The intelligent control aluminum alloy extrusion device according to claim 2, characterized in that, The mold temperature control system includes: A heating unit (7) is disposed on the mold base (4) and is used to heat the hollow diversion combination mold (5); The mold cooling unit (9) is located inside the mold base (4) and surrounds the hollow flow-dividing combination mold (5). The mold cooling unit (9) includes an annular cooling water jacket (91). The inner wall of the annular cooling water jacket (91) is divided into multiple fan-shaped partitions (92), and the multiple fan-shaped partitions (92) are distributed circumferentially and the flow rate of the cooling medium can be controlled independently.

4. The intelligent control aluminum alloy extrusion device according to claim 3, characterized in that, The heating unit (7) includes a ceramic support (71) and a heating coil (72). The ceramic support (71) is fixedly connected to the mold base (4), and the heating coil (72) is wound around the outer wall of the ceramic support (71).

5. The intelligent control aluminum alloy extrusion device according to claim 4, characterized in that, The profile cooling system also includes a temperature detection unit, which includes an external temperature measurement module for detecting the temperature of the outer wall of the profile and an internal temperature measurement module for detecting the temperature of the inner wall of the profile. The external cooling unit (10) includes an outer ring spray pipe (101), and a plurality of first nozzles (102) are provided on the outer ring spray pipe (101). The opening and closing of the first nozzles (102) are independently controlled by a first solenoid valve (103). The internal cooling unit (11) includes a spray rod (112) extending into the inner cavity of the profile. The spray rod (112) is provided with a plurality of second nozzles (113), and the opening and closing of the second nozzles (113) are independently controlled by a micro solenoid valve.

6. The intelligent control aluminum alloy extrusion device according to claim 5, characterized in that, The internal temperature measurement module is an internal infrared probe array (115), which is disposed on the internal cooling unit (11). The external temperature measurement module is an external infrared temperature measurement array (104), which is disposed on the external cooling unit (10).

7. The intelligent control aluminum alloy extrusion device according to claim 6, characterized in that, It also includes a control cabinet (8), which is electrically connected to a temperature detection unit, a mold cooling unit (9), a first solenoid valve (103), and a miniature solenoid valve; The control cabinet (8) is configured to receive a signal from the temperature detection unit and independently adjust the cooling intensity of each sector (92) in the mold cooling unit (9) based on the signal, and to independently adjust the cooling parameters of each first nozzle (102) and each second nozzle (113).

8. The intelligent control aluminum alloy extrusion device according to claim 7, characterized in that, The internal cooling unit (11) also includes a flange (111), the spray bar (112) is fixed by the flange (111), and the spray bar (112) is provided with mutually isolated partition pipes (114) inside. The partition pipes (114) include a fluid channel for supplying cooling medium to the second nozzle (113) and an electrical channel for laying control micro solenoid valve wiring harnesses.

9. The intelligent control aluminum alloy extrusion device according to claim 8, characterized in that, The extrusion mechanism includes a base (1), an extrusion cylinder (2) slidably connected to the base (1), and an extruder (3) for driving the extrusion rod to move within the extrusion cylinder (2).

10. A control method for an aluminum alloy extrusion apparatus based on the intelligent control described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: During the extrusion process, the temperature of different areas of the extrusion die (5) is adjusted by the die temperature control system. Step 2: After the profile is extruded, the temperature of the inner and outer walls of the profile is monitored in real time by a temperature detection unit; Step 3: Based on the monitored temperature, independently adjust the cooling parameters of the external cooling unit (10) and the internal cooling unit (11) through the control cabinet (8) to cool the inner and outer walls of the profile synchronously.

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