A precision forming die for a turbocharger housing

Abstract

The application belongs to the technical field of molds and discloses a precision forming mold for a turbocharger shell, which comprises a rack, a workbench and two molds, four stand columns are arranged on the top surface of the workbench, one of the two molds is arranged on the upper ends of the four stand columns, and the other mold is vertically and slidably arranged on the four stand columns; a mounting hole is arranged on the mold, an electric heating pipe is arranged in the mounting hole, a plurality of fixing holes are arranged on the mold, an oil pipe is arranged on the mold, the oil pipe passes through the corresponding fixing holes, a bottom plate is arranged on one side of the rack, a water tank is arranged on the bottom plate, a stand plate with a cavity is further arranged on the bottom plate, a metal sheet is arranged in the cavity, an oil supply assembly and a water supply assembly are arranged on the bottom plate. The electric heating pipe controls the temperature to ensure the flow of aluminum liquid and avoid defects. The oil supply assembly makes the heat conducting oil circulate and heat evenly, thereby improving the temperature control precision; when cooling, the cooling water and the heat conducting oil are rapidly cooled through the sheet. The mold shortens the cycle, improves the efficiency, and improves the shell forming precision and quality stability.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a precision forming mold for a turbocharger housing. Background Technology

[0002] As automotive demands for power and energy conservation / emission reduction increase, the importance of turbochargers is becoming increasingly prominent. They utilize exhaust gas energy to drive a turbine, which in turn drives a compressor impeller to compress air, thereby enhancing engine power and torque while reducing fuel consumption and emissions. The turbocharger housing plays a crucial role, housing and supporting the turbine and compressor impeller to ensure their stable high-speed operation, withstand high temperatures and pressures, and maintain excellent sealing to prevent leaks. This housing is often manufactured using gravity casting.

[0003] Chinese utility model patent with publication number CN215237615U discloses an aluminum alloy metal gravity casting turbocharger compressor housing mold, including an upper mold and a lower mold. The surface of the upper mold is provided with a casting component, a forming component is provided between the upper mold and the lower mold, and a heating tube is inserted into the surface of the lower mold.

[0004] Regarding the aforementioned technologies, the inventors believe they suffer from the following drawbacks: direct heating via heating tubes easily leads to significant temperature differences across different areas of the mold, resulting in insufficient temperature control precision and affecting product molding consistency. Furthermore, the slow natural cooling rate of the mold after molding causes excessively long molding cycles for the turbocharger housing, resulting in low production efficiency. Utility Model Content

[0005] To solve the above problems, this utility model provides a precision forming mold for turbocharger housing.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a precision forming mold for a turbocharger housing, comprising a frame and two molds. A worktable is provided on the top of the frame, and four columns arranged in a rectangular array are vertically arranged on the top surface of the worktable. One mold is fixedly mounted on the upper end of the four columns, and the other mold is vertically slidably mounted on the four columns. Several spaced mounting holes are horizontally opened on the mold, and electric heating tubes are installed in the mounting holes. Several spaced fixing holes are also horizontally opened on the mold. Oil pipes are provided on the mold and pass through the corresponding fixing holes. A base plate is provided on one side of the frame, and a water tank is provided on the base plate. A vertical plate with an internal cavity is also provided on the base plate. A thin metal plate is provided in the cavity to divide the cavity into an oil cavity and a water cavity. An oil supply assembly for flowing heat transfer oil between the oil pipe and the oil cavity is provided on the base plate, and a water supply assembly for flowing water between the water tank and the water cavity is also provided on the base plate.

[0007] By adopting the above technical solution, and setting up electric heating tubes, oil supply components, and water supply components, the electric heating tubes in the mold can control the mold temperature, ensuring the fluidity of the molten aluminum, ensuring complete filling, and avoiding molding defects caused by insufficient local temperature. Simultaneously, the oil supply component drives the heat transfer oil to form a closed-loop circulation between the oil pipe and the oil cavity. Utilizing the uniform thermal conductivity of the oil, the heating of different areas of the mold is more even, further improving the accuracy of temperature control. During the cooling stage, the water supply component continuously circulates cooling water between the water tank and the water cavity. At this time, the high-temperature heat transfer oil and the low-temperature cooling water complete efficient heat exchange through the metal plate, quickly removing heat from the mold and achieving mold cooling. This not only significantly shortens the molding cycle and improves production efficiency, but also effectively improves the molding accuracy and product quality stability of the turbocharger housing through stable temperature field control.

[0008] Furthermore, the oil pipe includes two serpentine tubes that pass through corresponding fixing holes. The two serpentine tubes are connected at opposite ends by a first connecting pipe, and at adjacent ends by a second connecting pipe.

[0009] Furthermore, the oil supply assembly includes an oil pump mounted on the base plate. The input end of the oil pump is connected to the lower part of the oil chamber, and the output end is connected to two first connecting pipes through a first connecting pipe. A second connecting pipe is provided on the vertical plate, which is connected to the upper part of the oil chamber and is connected to two second connecting pipes.

[0010] By adopting the above technical solution, an oil pump and a second connecting pipe are installed. The oil pump extracts the heat-conducting oil from the lower part of the oil chamber, transports it to the oil pipe of the mold through the first connecting pipe, and then flows back to the upper part of the oil chamber through the second connecting pipe, forming a circulating flow of heat-conducting oil. This maintains the stability of the mold temperature and allows for more uniform heating of all parts of the mold, avoiding local overheating or undercooling and improving molding quality.

[0011] Furthermore, the water supply assembly includes a water pump mounted on the base plate, the output end of the water pump being connected to the lower part of the water cavity and the input end being connected to the lower part of the water tank, and a water supply pipe connected to the upper part of the water cavity being mounted on the upright plate, with the end of the water supply pipe away from the upright plate located directly above the water tank.

[0012] By adopting the above technical solution, a water pump and water supply pipe are installed. The water pump sends water from the water tank to the lower part of the water chamber. After absorbing heat in the water chamber, the water flows back to the water tank through the water supply pipe, realizing water circulation. Cooling the heat transfer oil effectively removes heat from the mold, allowing the mold to cool down quickly, accelerating the cooling and molding speed of the turbocharger housing, and improving production efficiency. At the same time, the circulating water system can reuse water resources, saving costs.

[0013] Furthermore, a circular hole is provided in the middle of the workbench, and a hydraulic cylinder is vertically arranged inside the frame. The piston rod of the hydraulic cylinder passes upward through the circular hole and connects to the bottom surface of the mold on the lower side.

[0014] By adopting the above technical solution and setting up a hydraulic cylinder, the lower mold can be driven to slide vertically along the column, thereby realizing the opening and closing action of the mold, which facilitates the loading, unloading and forming operation of the turbocharger housing.

[0015] Furthermore, an extension plate is provided on one side of the frame, and a limiting ring is provided at the end of the extension plate away from the frame, through which both the first connecting pipe and the second connecting pipe pass.

[0016] By adopting the above technical solution and setting up extension plates and limiting rings, on the one hand, the shaking or displacement of the first and second connecting pipes caused by fluid impact during the flow of heat transfer oil can be effectively suppressed, ensuring the stability of the pipeline layout; on the other hand, when the mold movement drives the first and second connecting pipes to move synchronously, the limiting effect can guide the pipeline to move along a preset trajectory, avoiding pipeline damage caused by disorderly pulling or bending. This ensures the operational stability and reliability of the oil supply system.

[0017] Furthermore, both the first connecting pipe and the second connecting pipe are Y-shaped flexible tubes.

[0018] In summary, this utility model has the following beneficial effects: In this application, an electric heating element, an oil supply assembly, and a water supply assembly are provided. By installing the electric heating element in the mold, the mold temperature can be controlled, ensuring the fluidity of the molten aluminum, ensuring complete filling, and avoiding molding defects caused by insufficient local temperature. Simultaneously, the oil supply assembly drives the heat transfer oil to form a closed-loop circulation between the oil pipe and the oil cavity. Utilizing the uniform heat conduction characteristics of the oil, the heating of each area of ​​the mold is more even, further improving the accuracy of temperature control. During the cooling stage, the water supply assembly continuously circulates cooling water between the water tank and the water cavity. At this time, the high-temperature heat transfer oil and the low-temperature cooling water complete efficient heat exchange through the metal plate, quickly removing heat from the mold and achieving mold cooling. This not only significantly shortens the molding cycle and improves production efficiency but also effectively improves the molding accuracy and product quality stability of the turbocharger housing through stable temperature field control. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the workbench and mold in an embodiment of this utility model;

[0021] Figure 3 This is a structural schematic diagram of the workbench and mold from another angle in an embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the mold according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the internal structure of the upright plate in an embodiment of this utility model.

[0024] In the diagram: 10. Frame; 11. Mold; 12. Workbench; 13. Circular hole; 14. Column; 15. Electric heating element; 16. Hydraulic cylinder; 20. Oil pipe; 21. Serpentine pipe; 22. First connecting pipe; 23. Second connecting pipe; 30. Base plate; 31. Water tank; 32. Vertical plate; 33. Metal sheet; 40. Oil supply assembly; 41. Oil pump; 42. First connecting pipe; 43. Second connecting pipe; 50. Water supply assembly; 51. Water pump; 52. Water supply pipe; 60. Extension plate; 61. Limiting ring. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] like Figure 1-5 As shown in the illustration, this application discloses a precision forming mold for a turbocharger housing, including a frame 10 and two molds 11. A worktable 12 is mounted on the top of the frame 10, and four columns 14 arranged in a rectangular array are vertically arranged on the top surface of the worktable 12. One mold 11 is fixedly mounted on the upper end of the four columns 14. The other mold 11 is located below the mold 11 at the upper end of the columns 14 and has four guide holes. The four guide holes are slidably fitted onto the four columns 14, allowing the lower mold 11 to rise and fall along the columns 14. A cavity is provided at the top and bottom of the lower mold 11, and a pouring port communicating with the cavity is provided at the top of the upper mold 11. A circular hole 13 is provided in the middle of the workbench 12. A hydraulic cylinder 16 is vertically installed inside the frame 10. The piston rod of the hydraulic cylinder 16 passes upward through the circular hole 13 and connects to the bottom surface of the lower mold 11. The hydraulic cylinder 16 drives the lower mold 11 to slide vertically along the column 14, realizing the opening and closing action of the mold 11, which facilitates the loading, unloading and forming operation of the turbocharger housing.

[0027] Specifically, the mold 11 has several horizontally spaced mounting holes, each housing an electric heating element 15. The core of the electric heating element 15 is a heating wire, typically made of a metal with high resistance, such as a nickel-chromium alloy. When current flows through the heating wire, its resistance impedes the current flow, converting electrical energy into heat energy and raising the temperature of the heating wire, which in turn raises the temperature of the electric heating element 15. By incorporating the electric heating element 15 into the mold 11, the temperature of the mold 11 can be controlled, ensuring the fluidity of the molten aluminum, guaranteeing complete filling, and preventing molding defects caused by insufficient localized temperature. The mold 11 is also horizontally provided with several spaced fixing holes. Oil pipes 20 are installed on the mold 11, passing through the corresponding fixing holes. A base plate 30 is provided on one side of the frame 10, and a water tank 31 is installed on the base plate 30. A vertical plate 32 with an internal cavity is also installed on the base plate 30, located between the water tank 31 and the frame 10. A thin metal plate 33 is installed inside the cavity, dividing it into an oil cavity and a water cavity. An oil supply assembly 40 is installed on the base plate 30 to allow heat transfer oil to flow between the oil pipes 20 and the oil cavity. A water supply assembly 50 is also installed on the base plate 30 to allow water to flow between the water tank 31 and the water cavity. When the electric heating element 15 heats the mold 11, the oil supply assembly 40 drives the heat transfer oil to form a closed-loop circulation between the oil pipes 20 and the oil cavity. Utilizing the uniform heat conduction characteristics of the oil, the heating of each area of ​​the mold 11 is more even, further improving the accuracy of temperature control. During the cooling phase, the water supply assembly 50 continuously circulates cooling water between the water tank 31 and the water cavity. At this time, the high-temperature heat transfer oil and the low-temperature cooling water complete efficient heat exchange through the metal plate 33, quickly removing heat from the mold 11 and cooling it down. This not only significantly shortens the molding cycle and improves production efficiency, but also effectively enhances the molding accuracy and product quality stability of the turbocharger housing through stable temperature field control.

[0028] During setup, the oil pipe 20 includes two serpentine pipes 21, which pass through corresponding fixing holes. The two serpentine pipes 21 are connected at opposite ends via a first connecting pipe 22, and at adjacent ends via a second connecting pipe 23. The oil supply assembly 40 includes an oil pump 41 mounted on the base plate 30. The input end of the oil pump 41 passes through the vertical plate 32 and communicates with the lower part of the oil chamber, while the output end communicates with the two first connecting pipes 22 via the first connecting pipe 42. A second connecting pipe 43, communicating with the upper part of the oil chamber, is mounted on the vertical plate 32 and communicates with the two second connecting pipes 23. The oil pump 41 draws heat-conducting oil from the lower part of the oil chamber, delivers it through the first connecting pipe 42 to the oil pipe 20 of the mold 11, and then flows back to the upper part of the oil chamber via the second connecting pipe 43, forming a circulating flow of heat-conducting oil. This maintains the stable temperature of the mold 11 and ensures more uniform heating of all parts of the mold 11, avoiding local overheating or undercooling and improving molding quality.

[0029] In a specific configuration, the water supply assembly 50 includes a water pump 51 mounted on the base plate 30. The output end of the water pump 51 is connected to the lower part of the water cavity, and the input end is connected to the lower part of the water tank 31. A water supply pipe 52 connected to the upper part of the water cavity is mounted on the vertical plate 32. The end of the water supply pipe 52 away from the vertical plate 32 is located directly above the water tank 31, and its opening faces the inside of the water tank 31. One side of the water tank 31 is connected to the outer wall of the water supply pipe 52, providing support for the water supply pipe 52. The water pump 51 delivers water from the water tank 31 into the lower part of the water cavity. After absorbing heat in the water cavity, the water flows back to the water tank 31 through the water supply pipe 52, thus achieving water circulation. Cooling the heat transfer oil can effectively remove heat from the mold 11, allowing the mold 11 to cool down quickly, accelerating the cooling and molding speed of the turbocharger housing, and improving production efficiency. At the same time, the circulating water system can reuse water resources, saving costs. The first connecting pipe 42 and the second connecting pipe 43 are both Y-shaped flexible hoses.

[0030] It is worth noting that when the heating component heats the mold 11, the water supply component 50 is stopped, and the water in the water chamber remains still. At this time, even if the water absorbs some of the heat from the heat transfer oil through the metal plate 33, since the water does not circulate, the heat exchange is limited to a local area, and the overall heat carried away is negligible. This will not significantly affect the heating efficiency and temperature stability of the mold 11, ensuring that the heating process can proceed efficiently.

[0031] During the cooling stage, the cooled heat transfer oil is transported through the first connecting pipe 22 to the end of the serpentine pipe 21 furthest from the center of the mold 11, and then flows along the path of the serpentine pipe 21 towards the center of the mold 11. In this movement, the low-temperature heat transfer oil first contacts the outside of the mold 11, rapidly absorbing external heat, causing the external temperature of the mold 11 to cool down faster than the internal temperature. This temperature change directly affects the forming of the turbocharger housing, causing the outer surface of the housing to solidify first, and then, as the heat transfer oil moves towards the center and gradually absorbs internal heat, the center of the housing gradually solidifies. This utilizes the characteristic of initial solidification on the outside to create a stable outer shape for the housing, preventing external deformation, while allowing sufficient time for the internal molten metal to shrink and replenish itself through gradual solidification in the center. During this movement, the low-temperature heat transfer oil is in full contact with the high-temperature mold 11, continuously absorbing the heat emitted by the mold 11, causing the temperature of the mold 11 to gradually decrease. The heat transfer oil, after absorbing heat, then flows out through the second connecting pipe 23, completing one heat exchange cycle, effectively ensuring the forming accuracy and structural integrity of the turbocharger housing.

[0032] To ensure long-term operational stability, a heat sink and a fan (not shown in the diagram) are installed on the water tank 31. The fan blows air to remove heat from the water tank 31, lowering the water temperature. Cold water can also be added periodically and some hot water can be drained to maintain the water temperature in the water tank 31 within a suitable range, ensuring that the heat exchange efficiency during the cooling stage is not affected, and guaranteeing the cooling effect of the mold 11 and the quality of the shell molding.

[0033] An extension plate 60 is provided on one side of the frame 10, and a limiting ring 61 is provided at the end of the extension plate 60 away from the frame 10. The first connecting pipe 42 and the second connecting pipe 43 both pass through the limiting ring 61. On the one hand, this can effectively suppress the shaking or displacement of the first connecting pipe 42 and the second connecting pipe 43 due to fluid impact force when the heat transfer oil flows, ensuring the stability of the pipeline layout; on the other hand, when the mold 11 moves and drives the first connecting pipe 42 and the second connecting pipe 43 to move synchronously, the limiting action can guide the pipeline to move along a preset trajectory, avoiding pipeline damage caused by disorderly pulling or bending. This ensures the operational stability and reliability of the oil supply system.

[0034] The operating principle of the precision forming mold for a turbocharger housing in this embodiment is as follows: The hydraulic cylinder 16 is activated, pushing the lower mold 11 upwards along the four columns 14 until it tightly closes with the upper mold 11, forming a complete sealed space with the cavities of the upper and lower molds 11. The electric heating tube 15 is energized, and the oil pump 41 is activated, drawing the heat-conducting oil from the oil cavity of the vertical plate 32. This oil is then transported through the first connecting pipe 42 to the serpentine pipe 21. The heat-conducting oil flows along the serpentine pipe 21, and then flows back to the upper part of the oil cavity through the second connecting pipe 23 and the second connecting pipe 43, forming a closed-loop circulation. This ensures that all areas of the mold 11 are uniformly heated to the set temperature. Subsequently, molten aluminum is injected into the cavity through the pouring port of the upper mold 11. Under the action of the thermal field of the mold 11, the molten aluminum maintains its fluidity, fully filling all parts of the cavity. After filling, the mold is maintained in a state of heat preservation and pressure holding. Next, the electric heating element 15 is de-energized and stops working, and the water pump 51 is started to send the cooling water in the water tank 31 into the lower part of the water cavity of the vertical plate 32. At the same time, the high-temperature heat transfer oil continues to circulate, exchanging heat efficiently with the low-temperature cooling water in the water cavity through the metal thin plate 33. The cooled heat transfer oil is transported to the serpentine pipe 21 through the first connecting pipe 42, flowing along the serpentine pipe 21 to reduce the temperature of the mold 11. The cooling water that has absorbed heat flows back to the water tank 31 through the water supply pipe 52 for circulation. After the shell is completely solidified, the piston rod of the hydraulic cylinder 16 retracts, driving the lower mold 11 to descend along the column 14 and separate from the upper mold 11. The operator then removes the formed turbocharger shell from the cavity.

[0035] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A precision forming mold for a turbocharger housing, comprising a frame (10) and two molds (11), wherein a worktable (12) is provided on the top of the frame (10), and four columns (14) arranged in a rectangular array are vertically arranged on the top surface of the worktable (12), wherein one of the molds (11) is fixedly mounted on the upper end of the four columns (14), and the other mold (11) is vertically slidably mounted on the four columns (14), characterized in that: The mold (11) has several horizontally spaced mounting holes, and an electric heating tube (15) is installed in each mounting hole. The mold (11) also has several horizontally spaced fixing holes. An oil pipe (20) is provided on the mold (11), and the oil pipe (20) passes through the corresponding fixing hole. A base plate (30) is provided on one side of the frame (10). A water tank (31) is provided on the base plate (30). A vertical plate (32) with an internal cavity is also provided on the base plate (30). A thin metal plate (33) is provided in the cavity to divide the cavity into an oil cavity and a water cavity. An oil supply assembly (40) is provided on the base plate (30) to allow heat transfer oil to flow between the oil pipe (20) and the oil cavity. A water supply assembly (50) is also provided on the base plate (30) to allow water to flow between the water tank (31) and the water cavity.

2. The precision forming mold for a turbocharger housing according to claim 1, characterized in that: The oil pipe (20) includes two serpentine pipes (21), which pass through corresponding fixing holes. The two serpentine pipes (21) are connected at opposite ends by a first connecting pipe (22), and at adjacent ends by a second connecting pipe (23).

3. The precision forming mold for a turbocharger housing according to claim 2, characterized in that: The oil supply assembly (40) includes an oil pump (41) mounted on a base plate (30). The input end of the oil pump (41) is connected to the lower part of the oil chamber, and the output end is connected to two first connecting pipes (22) through a first connecting pipe (42). A second connecting pipe (43) is mounted on the vertical plate (32) and is connected to the upper part of the oil chamber. The second connecting pipe (43) is connected to two second connecting pipes (23).

4. The precision forming mold for a turbocharger housing according to claim 3, characterized in that: The water supply assembly (50) includes a water pump (51) mounted on a base plate (30). The output end of the water pump (51) is connected to the lower part of the water cavity, and the input end is connected to the lower part of the water tank (31). A water supply pipe (52) connected to the upper part of the water cavity is mounted on the upright plate (32). The end of the water supply pipe (52) away from the upright plate (32) is located directly above the water tank (31).

5. A precision forming mold for a turbocharger housing according to claim 1, characterized in that: The workbench (12) has a circular hole (13) in the middle. A hydraulic cylinder (16) is vertically arranged inside the frame (10). The piston rod of the hydraulic cylinder (16) passes upward through the circular hole (13) and connects to the bottom surface of the mold (11) on the lower side.

6. A precision forming mold for a turbocharger housing according to claim 4, characterized in that: An extension plate (60) is provided on one side of the frame (10). A limiting ring (61) is provided at the end of the extension plate (60) away from the frame (10). The first connecting pipe (42) and the second connecting pipe (43) both pass through the limiting ring (61).

7. A precision forming mold for a turbocharger housing according to claim 4, characterized in that: Both the first connecting pipe (42) and the second connecting pipe (43) are Y-shaped flexible tubes.

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