A precision surface forming die casting device for metal components

Abstract

This invention discloses a precision surface forming die-casting device for metal components, relating to the field of aluminum alloy die-casting technology. The invention establishes a channel corresponding to two insertion holes on a second mold base and connects it to an external fine sand supply device. This allows the device to quickly fill a pre-placed copper tube with fine sand. The tight filling of the copper tube with fine sand effectively improves the overall quality and rigidity of the copper tube, significantly offsetting the impact and scouring disturbance of the molten metal, and effectively ensuring the accuracy of the final embedding position of the copper tube. Simultaneously, by integrating the surface processing mechanism into the end of the core, the inner surface of the motor housing can be directly precision-machined during mold opening, achieving a one-time improvement in inner surface smoothness and dimensional accuracy. This avoids subsequent secondary processing, significantly improving product qualification rate and greatly shortening the production cycle, effectively enhancing production efficiency.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy die casting technology, and in particular to a precision surface forming die casting device for metal components. Background Technology

[0002] With the rapid development of the motor manufacturing industry, aluminum alloy motor housings have become core supporting components for motors due to their advantages such as light weight, good thermal conductivity, and high forming efficiency. To meet the heat dissipation requirements of motors, the industry generally adopts the prefabricated copper tube insert die-casting process, which embeds copper tubes as cooling water channels inside the aluminum alloy motor housing, realizing the integrated molding of the housing and cooling pipes. This process is widely used in the mass production of various high and low power motors.

[0003] Currently, when existing die-casting equipment performs copper tube embedding in aluminum alloy motor housings, high-temperature molten aluminum alloy is injected into the mold cavity under high pressure and high speed. During this process, the flowing molten liquid directly impacts and scours the pre-fixed copper tube, generating strong disturbances. This makes the copper tube clamped in the cavity prone to displacement and skew, resulting in deviations in the final position and angle of the copper tube embedded in the housing from the design standards, thus affecting the product qualification rate. Furthermore, due to multiple factors such as molten liquid disturbance and insert displacement, the inner surface of the die-cast motor housing has a large roughness, which is difficult to meet the requirements of subsequent precision assembly. Often, additional processes are required to perform secondary processing on the die-cast blank, affecting the efficiency of aluminum alloy motor housing die-casting production.

[0004] To address these issues, a precision surface forming die-casting device for metal components is proposed. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art where, during the die casting process of embedding copper tubes in aluminum alloy motor housings, the pre-set copper tubes are easily deflected by the impact of molten metal, affecting the product qualification rate. Furthermore, the impact disturbance results in low precision of the inner wall surface of the product, requiring additional secondary processing and affecting production efficiency. Therefore, this invention proposes a precision surface forming die casting device for metal components.

[0006] To address the problems existing in the prior art, the present invention adopts the following technical solution: A precision surface forming die-casting apparatus for metal components includes a die-casting machine. The die-casting machine houses a male mold and a female mold, controlling their opening and closing actions. The male mold includes a first mold base with a core fixedly mounted at its center. The female mold includes a second mold base with a mold body fixedly mounted at its center. A cavity wall is formed within the mold body. A receiving groove is provided on the second mold base within the cavity wall. In the closed state, the end of the core is inserted into the receiving groove, and the core, in conjunction with the cavity wall, forms a cavity. A copper tube is pre-installed within the cavity. The mold has a gate that communicates with the inside of the cavity. The second mold base also has two insertion holes that communicate with the cavity. The two ends of the copper tube are inserted into the two insertion holes. An aluminum alloy component wrapped around the copper tube is die-cast inside the cavity. The second mold base has channels that correspond to the two insertion holes. The two channels are connected to a fine sand supply device. A surface processing mechanism is installed at the end of the core. The surface processing mechanism includes a turntable that is rotatably installed at the end of the core. A boring tool is installed on the upper edge of the turntable. A first servo motor for driving the turntable to rotate is fixedly installed in the first mold base.

[0007] Preferably, the mold body is divided into multiple modules, and the modules are slidably connected to the second mold base. The second mold base is fixedly equipped with a first hydraulic cylinder for controlling the multiple modules to move synchronously towards / away from the cavity wall.

[0008] Preferably, the second mold base has a cavity located between the insertion hole and the channel, and symmetrically arranged clamping blocks are slidably installed in the cavity. The clamping blocks have grooves adapted to the ends of the copper tubes, and hydraulic grippers for controlling the two clamping blocks to move closer / away synchronously are fixedly installed in the cavity.

[0009] Preferably, a slide table is slidably mounted on the turntable, a boring tool is fixedly mounted on the slide table, a screw that is threadedly connected to the slide table is rotatably mounted inside the turntable, and a second servo motor for driving the screw to rotate is fixedly mounted inside the first mold base.

[0010] Preferably, a first rotating shaft is rotatably mounted inside the first mold base, the turntable is coaxially and fixedly connected to the first rotating shaft, the drive shaft of the first servo motor is connected to the first rotating shaft for transmission, a second rotating shaft is rotatably mounted inside the first rotating shaft, and meshing bevel gears are fixedly mounted on the screw and the second rotating shaft.

[0011] Preferably, a worm gear is fixedly mounted on the second rotating shaft, and a worm that meshes with the worm gear is fixedly mounted on the drive shaft of the second servo motor.

[0012] Preferably, a push plate is movably sleeved on the outer side of the column core, and a plurality of symmetrically arranged second hydraulic cylinders are fixedly installed on the first mold base. The second hydraulic cylinders are used to push the push plate to move along the axial direction of the column core, and the end part of the mold body is provided with a groove adapted to the push plate.

[0013] Preferably, a connector is fixedly connected between the push plate and the piston rod of the second hydraulic cylinder. The connector is set in an L-shaped structure. In the mold closing state, multiple connectors cooperate with each other to clamp the outside of the mold body. Multiple connectors are set one-to-one with multiple modules.

[0014] Preferably, a connector is provided between the two channels and the fine sand supply device. The connector includes a housing, in which a first disc is rotatably mounted, and the first disc has three circumferentially distributed first openings. A first sealing plate is fixedly installed in one of the first openings. First connectors corresponding to one of the first openings are fixedly connected to both sides of the housing. A second disc is rotatably mounted inside the housing, and the second disc has three circumferentially distributed second openings. A second sealing plate is fixedly installed in one of the second openings, and a filter screen is fixedly installed in one of the second openings. Second connectors corresponding to one of the second openings are fixedly connected to both sides of the housing.

[0015] Preferably, a synchronous pulley is rotatably mounted inside the housing, and a synchronous belt is connected to the first disc, the second disc, and the synchronous pulley for transmission. A third servo motor for driving the synchronous pulley to rotate is fixedly mounted on the housing.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, by opening a channel corresponding to the two insertion holes on the second mold base and connecting it to an external fine sand supply device, the device can quickly fill the pre-placed copper tube with fine sand before die casting. The tight filling of the copper tube with fine sand effectively improves the overall quality and rigidity of the copper tube. Thus, when the high-pressure, high-speed aluminum alloy melt is injected into the cavity, it can significantly offset the impact force and scouring disturbance of the melt on the copper tube, effectively ensuring the accuracy of the final embedding position of the copper tube. At the same time, by integrating the surface processing mechanism into the end part of the core, the inner surface of the motor housing can be directly precision-machined during the mold opening process, completing the improvement of the inner surface smoothness and dimensional accuracy in one go. This helps to avoid subsequent secondary processing, which not only significantly improves the product qualification rate, but also greatly shortens the production cycle and effectively improves production efficiency. 2. In this invention, by designing the mold body of the female mold as multiple modules that can move radially in sync, and by setting a connecting piece driven by a second hydraulic cylinder that can lock and engage with the outside of the module and a push plate for sealing the end of the copper tube in the male mold, this structure allows the cavity to be sealed by the push plate while the core is being pulled out during mold opening. This helps to ensure the stability of the molded aluminum alloy component temporarily remaining in the cavity wall. Then, by using the radial release of the module, the molded part can be stably demolded without damage. The above-mentioned linkage optimizes the demolding action, which helps to protect the molded part and further ensures the product accuracy and the smoothness of the production process. 3. In this invention, by setting the adapter between the two channels and the fine sand supply device, the device can tightly fill the copper tube with fine sand during the die casting process to provide auxiliary support. After die casting, the fine sand can be controlled to circulate at high speed in the copper tube to provide auxiliary cooling of the molded part, which is beneficial to improving the curing speed and quality of the molded part. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a perspective view of the male and female molds of the present invention in their open state; Figure 2 This is a perspective view of the male and female molds of the present invention in the closed state. Figure 3 This is a perspective view of the male and female molds of the present invention installed inside a die-casting machine; Figure 4 For the present invention Figure 2 Front sectional view of the structure; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 For the present invention Figure 2 Top sectional view of the structure; Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle; Figure 8 This is a perspective view of the universal mold of the present invention; Figure 9 This is a perspective view of the master mold of the present invention; Figure 10 This is a perspective view of the surface processing mechanism of the present invention; Figure 11 This is a perspective view of the slide, screw, second rotating shaft, and bevel gear of the present invention; Figure 12 This is a perspective view of the first rotating shaft, the second rotating shaft, the worm gear, and the worm of the present invention; Figure 13 This is a perspective view of the push plate, the second hydraulic cylinder, and the connecting parts of the present invention; Figure 14 This is a cross-sectional view of the adapter of the present invention; Figure 15 This is an exploded view of the adapter of the present invention; Figure 16 This is a perspective view of the product formed by the aluminum alloy component of the present invention being wrapped around a copper tube.

[0018] In the picture: 1. Die-casting machine; 2. Male mold; 21. First mold base; 22. Core pillar; 3. Female mold; 31. Second mold base; 32. Mold body; 321. Module; 322. First hydraulic cylinder; 33. Cavity wall; 34. Receiving groove; 35. Cavity; 36. Gate; 4. Insertion hole; 41. Channel; 42. Cavity; 43. Clamping block; 44. Hydraulic gripper; 5. Surface finishing mechanism; 51. Turntable; 52. Boring tool; 53. First servo motor; 54. First rotating shaft; 55. Slide table; 551. Screw; 552. Second rotating shaft; 553. Bevel gear; 554. Second servo motor; 555. Worm gear; 556. Worm; 6. Push plate; 61. Second hydraulic cylinder; 62. Connecting piece; 63. Groove; 7. Adapter; 71. Housing; 72. First disc; 721. First port; 722. First sealing plate; 723. First connector; 73. Second disc; 731. Second port; 732. Second sealing plate; 733. Filter screen; 734. Second connector; 74. Synchronous pulley; 741. Synchronous belt; 742. Third servo motor; 8. Copper pipes; 81. Aluminum alloy components. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Example: This example provides a precision surface forming die-casting device for metal components. See [link to example]. Figure 1 - Figure 16Specifically, the die casting machine 1 contains a male mold 2 and a female mold 3. The die casting machine 1 controls the opening and closing of the male mold 2 and the female mold 3. The male mold 2 includes a first mold base 21, and a core 22 is fixedly installed in the middle of the first mold base 21. The female mold 3 includes a second mold base 31, and a mold body 32 is fixedly installed in the middle of the second mold base 31. A cavity wall 33 is formed inside the mold body 32. A receiving groove 34 is opened in the second mold base 31 within the cavity wall 33. In the closed state, the end of the core 22 is inserted into the receiving groove 34. The core 22 and the cavity wall 33 form a cavity 35. A copper tube 8 is pre-installed in the cavity 35. A cavity 35 is opened in the second mold base 31 to form a cavity 35. The cavity 35 has a gate 36 that is connected to it. The second mold base 31 also has two insertion holes 4 that are connected to the cavity 35. The two ends of the copper tube 8 are inserted into the two insertion holes 4. An aluminum alloy component 81 wrapped around the copper tube 8 is die-cast in the cavity 35. The second mold base 31 has a channel 41 that is connected to the two insertion holes 4. The two channels 41 are connected to a fine sand supply device. A surface processing mechanism 5 is installed at the end of the core 22. The surface processing mechanism 5 includes a turntable 51 that is rotatably installed at the end of the core 22. A boring tool 52 is installed on the upper edge of the turntable 51. A first servo motor 53 for driving the turntable 51 to rotate is fixedly installed in the first mold base 21.

[0021] In this device, by directly embedding the two key functional structures of "fine sand filling and integrated precision machining mechanism" inside the mold, a multifunctional and precise aluminum alloy motor housing copper tube die-casting system can be formed. During the production process, the operator first inserts the two ends of a pre-set irregular copper tube 8 into the two corresponding insertion holes 4 on the second mold base 31, so that its main body is pre-placed in the cavity 35. Then, the channel 41 connected to the two insertion holes 4 starts to work. The external fine sand supply device injects dry fine sand of a specific particle size into the cavity of the copper tube 8 at high speed through high-pressure airflow. The tightly packed fine sand can effectively improve the overall quality and rigidity of the copper tube 8, preparing the copper tube 8 to withstand the impact of high-pressure molten metal in the subsequent die-casting process.

[0022] During die casting after mold closing, under high pressure, the high-temperature aluminum alloy molten liquid is injected through the gate 36 into the sealed cavity 35 formed by the core 22 and the cavity wall 33. During the continuous filling process, the molten liquid completely envelops the pre-placed copper tube 8. During this process, the inside of the copper tube 8 is tightly supported by fine sand, which greatly enhances its ability to resist molten liquid erosion and fluid disturbance, avoids the copper tube 8 from shifting position, and ultimately ensures the geometric accuracy of the copper tube 8 embedding.

[0023] After die casting is completed, during the mold opening process, the die casting machine 1 controls the male mold 2 to move away from the female mold 3, and the core 22 is slowly pulled out from the inner hole of the formed aluminum alloy component 81. At the same time, the surface processing mechanism 5 installed at the end of the core 22 is started, and the first servo motor 53 drives the turntable 51 to rotate at high speed around the axis through the transmission system. The boring tool 52 fixed on the edge of the turntable 51 rotates synchronously. During the axial retraction of the core 22, the rotating boring tool 52 can simultaneously perform continuous boring and finishing on the inner wall of the aluminum alloy component 81. The inner wall is formed by the outer surface of the core 22. This process can be carried out directly inside the die casting mold without secondary clamping. It can remove the flash and burrs generated by die casting in one go and significantly reduce the surface roughness of the inner wall, making it suitable for direct use in precision assembly.

[0024] In the specific implementation process, such as Figure 9 As shown, the mold body 32 is divided into multiple modules 321. The modules 321 are slidably connected to the second mold base 31. A first hydraulic cylinder 322 is fixedly installed on the second mold base 31 to control the multiple modules 321 to move synchronously towards / away from the cavity wall 33. In this device, when the mold is closed, the multiple modules 321 move closer to each other under the drive of the first hydraulic cylinder 322, precisely gathering at the center position of the second mold base 31. The splicing surfaces of the multiple modules 321 fit tightly together, thereby forming a complete and closed mold at the center position of the second mold base 31. The body 32, together with the cavity wall 33 inside it, forms the shape of the motor housing, ensuring the shape accuracy of the cavity 35. When the mold is opened, after the core 22 is completely removed from the inner hole and cavity wall 33 of the molded part, the first hydraulic cylinder 322 drives multiple modules 321 to move outward synchronously, so that the modules 321 are completely separated from the outer surface of the molded aluminum alloy component 81, releasing the wrapping of the molded aluminum alloy component 81, creating space for the smooth removal of the product, effectively avoiding scratches during demolding, and effectively ensuring the smoothness of demolding.

[0025] In the specific implementation process, such as Figure 1 - Figure 2 , Figure 4 - Figure 5 , Figure 9 and Figure 16As shown, the second mold base 31 has a cavity 42 located between the insertion hole 4 and the channel 41. Symmetrically arranged clamping blocks 43 are slidably installed in the cavity 42. Each clamping block 43 has a groove adapted to the end of the copper tube 8. A hydraulic gripper 44 for controlling the synchronous approach / remote movement of the two clamping blocks 43 is fixedly installed in the cavity 42. In this device, before mold closing, during the pre-installation of the copper tube 8, the end of the copper tube 8 passes through the insertion hole 4 and reaches the channel 41, allowing its end to extend into the cavity 42 in front of the channel 41. Then, the hydraulic gripper 44 drives two symmetrically arranged clamping blocks 43 to move towards each other, so that the two symmetrically arranged clamping blocks 43 approach each other. Finally, the grooves opened on the clamping blocks 43 tightly hug the outer side of the end of the copper tube 8. At the same time, the side of the clamping blocks 43 seals the connection between the insertion hole 4 and the channel 41. Through this dual action of end face sealing and radial clamping, the two ends of the copper tube 8 are firmly locked in the predetermined position, providing a solid fixing foundation for subsequent filling of fine sand into the copper tube 8 and resisting the impact of molten liquid.

[0026] In the specific implementation process, such as Figure 4 , Figure 6 - Figure 8 and Figure 10 - Figure 12 As shown, a slide table 55 is slidably mounted on the turntable 51, and a boring bar 52 is fixedly mounted on the slide table 55. A screw 551, threadedly connected to the slide table 55, is rotatably mounted inside the turntable 51. A second servo motor 554 for driving the screw 551 to rotate is fixedly mounted inside the first mold base 21. A first rotating shaft 54 ​​is rotatably mounted inside the first mold base 21. The turntable 51 and the first rotating shaft 54 ​​are coaxially fixedly connected. The drive shaft of the first servo motor 53 is connected to the first rotating shaft 54. A second rotating shaft 552 is rotatably mounted inside the first rotating shaft 54. A bevel gear 553 meshing with each other is fixedly mounted on the screw 551 and the second rotating shaft 552. A worm gear 555 is fixedly mounted on the second rotating shaft 552. A worm 556 meshing with the worm gear 555 is fixedly mounted on the drive shaft of the second servo motor 554.

[0027] In this device, based on the design requirements of the inner wall of the product to be processed, the second servo motor 554 can be controlled to drive the worm gear 556 to rotate. Through the meshing transmission between the worm gear 556 and the worm wheel 555, the second rotating shaft 552 can be driven to rotate. The second rotating shaft 552 transmits rotational power to the screw 551 through a pair of bevel gears 553. Then, through the threaded connection between the screw 551 and the slide table 55, the rotational power is converted into linear motion of the slide table 55 on the turntable 51, thereby flexibly and precisely adjusting the radial extension of the boring bar 52 mounted on the slide table 55. This allows for adjustment of the feed depth of the boring bar 52. Through the above structural design, a surface processing mechanism 5 can adapt to the precision machining requirements of products with different inner diameters, effectively improving the versatility of the device. Furthermore, thanks to the self-locking meshing between the worm gear 555 and the worm 556, the feed depth of the boring bar 52 can only be adjusted when the second servo motor 554 is powered on. This effectively prevents abnormal deviation of the boring bar 52 and helps improve the accuracy of machining the inner surface of the formed aluminum alloy motor housing during the demolding process after die casting.

[0028] In the specific implementation process, such as Figure 1 , Figure 4 , Figure 6 , Figure 8 - Figure 9 and Figure 13 As shown, a push plate 6 is movably sleeved on the outer side of the core 22. Multiple symmetrically arranged second hydraulic cylinders 61 are fixedly installed on the first mold base 21. The second hydraulic cylinders 61 are used to push the push plate 6 to move axially along the core 22. A groove 63 adapted to the push plate 6 is opened at the end of the mold body 32. In this device, during the mold opening process, as the core 22 is pulled away from the inner side of the formed aluminum alloy component 81, the piston rod of the second hydraulic cylinder 61 extends synchronously, pushing the push plate 6 to move axially along the core 22, causing the push plate 6 to stop in the groove 63 opened at the end of the mold body 32. At this time, the push plate 6 blocks the opening end of the cavity 35, preventing the aluminum alloy component 81 from moving with the core 22. The two cylinders detach together, allowing the aluminum alloy component 81 to be temporarily and stably held within the cavity wall 33. This avoids component deformation and surface damage caused by sudden demolding. Once the core 22 is completely separated from the aluminum alloy component 81, the first hydraulic cylinder 322 drives multiple modules 321 to move radially outward synchronously, releasing the outer wall of the aluminum alloy component 81. At this time, the second hydraulic cylinder 61 drives the push plate 6 to reset, allowing the aluminum alloy component 81 to be smoothly ejected, completing the entire demolding process. This linkage design not only protects the product, especially the integrity of the product surface, but also optimizes the continuity and stability of the demolding action, which is beneficial to improving the quality of die casting production.

[0029] In the specific implementation process, such as Figure 2 , Figure 6 , Figure 8 and Figure 13 As shown, a connector 62 is fixedly connected between the push plate 6 and the piston rod of the second hydraulic cylinder 61. The connector 62 is set in an L-shaped structure. In the mold-closed state, multiple connectors 62 cooperate with each other to clamp the outside of the mold body 32. Multiple connectors 62 are set one-to-one with multiple modules 321. In this device, after the male mold 2 and female mold 3 are fully closed, multiple second hydraulic cylinders 61 are in a retracted state. At this time, the vertical side of the L-shaped connector 62 is exactly in contact with the outer contour of the mold body 32. This makes multiple connectors 62 surround and tightly clamp the outside of the mold body 32 assembled from multiple modules 321. Through this structural setting, it can not only play a role in assisting positioning and strengthening the mold-closed rigidity, but more importantly, in the die-casting process, it can effectively offset the huge expansion force generated when the melt is injected. It is beneficial to prevent the modules 321 from slightly expanding or shifting at the parting surface, thereby effectively ensuring the stability of the cavity 35 dimensions and further improving the dimensional accuracy of the product.

[0030] In the specific implementation process, such as Figure 14 - Figure 15 As shown, a connector 7 connects the two channels 41 and the fine sand supply device. The connector 7 includes a housing 71, in which a first disc 72 is rotatably mounted, and the first disc 72 has three circumferentially distributed first openings 721. A first sealing plate 722 is fixedly installed in one of the first openings 721. First connectors 723, corresponding to one of the first openings 721, are fixedly connected to both sides of the housing 71. A second disc 73 is rotatably mounted in the housing 71, and the second disc 73 has three circumferentially distributed... The second port 731 has a second sealing plate 732 fixedly installed inside it and a filter screen 733 fixedly installed inside it. The two sides of the housing 71 are fixedly connected to a second connector 734 corresponding to a second port 731. A synchronous wheel 74 is also rotatably installed inside the housing 71. The first disc 72, the second disc 73 and the synchronous wheel 74 are connected by a synchronous belt 741 for transmission. A third servo motor 742 for driving the synchronous wheel 74 to rotate is fixedly installed on the housing 71.

[0031] In this device, the fine sand supply device is equipped with a sand supply port and a sand return port. The first connector 723 on one side is connected to the sand supply port through a pipe, and the first connector 723 on the other side is connected to a channel 41 through a pipe. The second connector 734 on one side is connected to the sand return port through a pipe, and the second connector 734 on the other side is connected to another channel 41 through a pipe. An air pump is fixedly installed inside the fine sand supply device, which acts on the sand supply port and the sand return port. Under the action of the air pump, the sand supply port transports fine sand outward by carrying sand particles through a high-speed airflow. The sand supply port can also directly transport a high-speed airflow outward. Under the action of the air pump, the sand return port draws back fine sand into the fine sand supply device through a high-speed airflow. The fine sand is mixed with coarse sand. The size of the fine sand is 200-300 mesh, and the size of the coarse sand is 60-80 mesh.

[0032] Under the transmission connection of the synchronous belt 741, the first disk 72 and the second disk 73 are driven to rotate synchronously by the third servo motor 742. The angle of rotation of the first disk 72 and the second disk 73 is 120° each time. On the first disk 72 and the second disk 73, a through first port 721 and a through second port 731 are correspondingly set. The through first port 721 is correspondingly set with the filter screen 733. The first sealing plate 722 is correspondingly set with the second sealing plate 732.

[0033] Before die casting, after the copper tube 8 is pre-installed, the first port 721 is switched to connect between the first connectors 723 on both sides, and the filter screen 733 is positioned between the second connectors 734 on both sides. Through high-pressure air blowing from the sand supply port and air extraction from the sand return port, sand particles can be quickly filled into the copper tube 8. The fine sand is gradually filled and compacted within the copper tube 8. Once the fine sand has filled the copper tube 8, the adapter 7 switches to the first sealing plate 722 sealing between the first connectors 723 on both sides, and the second sealing plate 732 sealing between the second connectors 734 on both sides. The state between 34 and 35 seals both ends of the copper tube 8, which ensures that the fine sand fills the copper tube 8 tightly and without voids during the die casting process. The fine sand forms a stable support inside the copper tube 8, effectively improving the overall quality and rigidity of the copper tube 8. When the high-pressure, high-speed aluminum alloy molten liquid is injected into the cavity 35, it can significantly offset the impact force and scouring disturbance of the molten liquid on the copper tube 8, thereby greatly suppressing the displacement and skewness of the copper tube 8 in the cavity 35, effectively ensuring the accuracy of the final embedded position of the copper tube 8, and directly improving the product qualification rate.

[0034] After die casting is completed, the adapter 7 is switched again to a state where the first port 721 is connected between the first connectors 723 on both sides and the second port 731 is connected between the second connectors 734 on both sides. Then, the fine sand is driven by the air pump to circulate at high speed in the copper pipe 8. The heat transfer of the fine sand is used to uniformly and quickly assist in cooling the formed aluminum alloy component 81, which can accelerate its solidification and shape setting, and is conducive to improving the density and surface quality of the formed aluminum alloy component 81.

[0035] Specifically, the working principle of this invention includes the following steps: S1. Copper tube pre-fixation and mold closing; The two ends of the copper tube 8 are inserted into the insertion hole 4, and the clamping block 43 is driven by the hydraulic jaw 44 to clamp the ends of the copper tube 8, thereby achieving the pre-positioning and sealing of the copper tube 8. Then, the mold closing operation is carried out under the control of the die casting machine 1.

[0036] S2, fine sand filling; By switching the passage through the adapter 7, fine sand is filled into the copper pipe 8 using the fine sand supply device to enhance the impact resistance of the copper pipe 8.

[0037] S3, die casting; High-temperature aluminum alloy molten liquid is injected into the cavity 35 under high pressure through the gate 36, wrapping around the outside of the copper tube 8 and forming an aluminum alloy component 81. During this process, fine sand is filled in the supporting copper tube 8 to resist the impact of the molten liquid, while the module 321 is held by the connector 62 to keep the cavity 35 stable.

[0038] S4. Component cooling and fine sand recovery; After die casting is completed, switch the adapter 7 to control the fine sand to circulate in the copper pipe 8, accelerate the cooling of the component, and finally the fine sand is drawn back into the fine sand supply device.

[0039] S5. Mold opening and surface finishing; The die-casting machine 1 is used to open the mold, and the core 22 slowly retracts. At the same time, the first servo motor 53 drives the turntable 51 to rotate, which drives the boring bar 52 to bore the inner wall of the aluminum alloy component 81. The second servo motor 554 adjusts the radial feed of the boring bar 52 through the transmission of the worm 556, worm wheel 555 and bevel gear 553 to adapt to the machining requirements of different inner diameters.

[0040] S6. Segmented demolding; During the withdrawal of the core 22, the push plate 6, driven by the second hydraulic cylinder 61, continues to extend forward to block the opening of the cavity 35, so that the aluminum alloy component 81 remains temporarily in the cavity wall 33. After the core 22 is completely withdrawn, the module 321 is radially released under the drive of the first hydraulic cylinder 322, and then the push plate 6 is reset, and the aluminum alloy component 81 is smoothly removed.

[0041] Through the above process, the device achieves precise positioning, impact resistance and stability, immediate internal surface processing after molding and efficient demolding of copper tube inserts during die casting, significantly improving product accuracy and production efficiency.

[0042] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A precision surface forming die casting device for metal components, comprising a die casting machine (1), wherein a male mold (2) and a female mold (3) are installed inside the die casting machine (1), the die casting machine (1) is used to control the male mold (2) and the female mold (3) to perform mold opening and closing actions, the male mold (2) includes a first mold base (21), and a core (22) is fixedly installed at the middle position on the first mold base (21), the female mold (3) includes a second mold base (31), and a mold body (32) is fixedly installed at the middle position on the second mold base (31), and a cavity wall (33) is formed inside the mold body (32), characterized in that: The second mold base (31) has a receiving groove (34) located in the cavity wall (33). In the mold-closed state, the end of the core (22) is inserted into the receiving groove (34). The core (22) and the cavity wall (33) form a cavity (35). A copper tube (8) is pre-installed in the cavity (35). The second mold base (31) has a gate (36) that communicates with the inside of the cavity (35). The second mold base (31) also has two insertion holes (4) that communicate with the cavity (35). The two ends of the copper tube (8) are inserted into the two insertion holes (4). The cavity (35) is... An aluminum alloy component (81) is die-cast and wrapped around a copper tube (8). The second mold base (31) has a channel (41) connected to two insertion holes (4). The two channels (41) are connected to a fine sand supply device. A surface processing mechanism (5) is installed at the end of the core (22). The surface processing mechanism (5) includes a turntable (51) rotatably installed at the end of the core (22). A boring tool (52) is installed on the upper edge of the turntable (51). A first servo motor (53) for driving the turntable (51) to rotate is fixedly installed in the first mold base (21).

2. A precision surface forming die casting apparatus for a metal member according to claim 1, characterized by: The mold body (32) is divided into multiple modules (321) around the perimeter. The modules (321) are slidably connected to the second mold base (31). The second mold base (31) is fixedly equipped with a first hydraulic cylinder (322) for controlling the multiple modules (321) to move closer to / away from the cavity wall (33) synchronously.

3. The apparatus for precision surface forming of a metal member by die casting according to claim 1, wherein: The second mold base (31) has a cavity (42) located between the insertion hole (4) and the channel (41). A symmetrically arranged clamping block (43) is slidably installed in the cavity (42). The clamping block (43) has a groove adapted to the end of the copper tube (8). A hydraulic gripper (44) for controlling the two clamping blocks (43) to move closer / away synchronously is fixedly installed in the cavity (42).

4. The apparatus for precision surface forming of a metal member by die casting according to claim 1, characterized by: A slide table (55) is slidably mounted on the turntable (51), and the boring tool (52) is fixedly mounted on the slide table (55). A screw (551) that is threadedly connected to the slide table (55) is rotatably mounted inside the turntable (51), and a second servo motor (554) for driving the screw (551) to rotate is fixedly mounted inside the first mold base (21).

5. A precision surface forming die casting apparatus for a metal member according to claim 4, characterized in that: A first rotating shaft (54) is rotatably installed inside the first mold base (21). The turntable (51) is coaxially and fixedly connected to the first rotating shaft (54). The drive shaft of the first servo motor (53) is connected to the first rotating shaft (54) for transmission. A second rotating shaft (552) is rotatably installed inside the first rotating shaft (54). Meshing bevel gears (553) are fixedly installed on the screw (551) and the second rotating shaft (552).

6. A precision surface forming die casting apparatus for a metal member according to claim 5, characterized by: A worm gear (555) is fixedly mounted on the second rotating shaft (552), and a worm (556) that meshes with the worm gear (555) is fixedly mounted on the drive shaft of the second servo motor (554).

7. The precision surface forming die-casting device for metal components according to claim 1, characterized in that: The outer side of the core (22) is movably fitted with a push plate (6), and a plurality of symmetrically arranged second hydraulic cylinders (61) are fixedly installed on the first mold base (21). The second hydraulic cylinders (61) are used to push the push plate (6) to move axially along the core (22). The end of the mold body (32) is provided with a groove (63) that is adapted to the push plate (6).

8. A precision surface forming die casting apparatus for a metal member according to claim 7, characterized by: A connector (62) is fixedly connected between the push plate (6) and the piston rod of the second hydraulic cylinder (61). The connector (62) is set in an L-shaped structure. In the mold closing state, multiple connectors (62) cooperate with each other to clamp the outside of the mold body (32). Multiple connectors (62) are set one-to-one with multiple modules (321).

9. The apparatus for precision surface forming of a metal member by die casting according to claim 1, characterized by: A connector (7) is connected between the two channels (41) and the fine sand supply device. The connector (7) includes a housing (71). A first disc (72) is rotatably installed inside the housing (71). The first disc (72) has three first openings (721) arranged in a ring. A first sealing plate (722) is fixedly installed in one of the first openings (721). A first connector (723) corresponding to one of the first openings (721) is fixedly connected to both sides of the housing (71). A second disc (73) is rotatably installed inside the housing (71). The second disc (73) has three second openings (731) arranged in a ring. A second sealing plate (732) is fixedly installed in one of the second openings (731). A filter screen (733) is fixedly installed in one of the second openings (731). A second connector (734) corresponding to one of the second openings (731) is fixedly connected to both sides of the housing (71).

10. The apparatus for precision surface forming of a metal member by die casting according to claim 9, wherein: A synchronous wheel (74) is rotatably installed inside the housing (71). A synchronous belt (741) is connected between the first disc (72), the second disc (73) and the synchronous wheel (74) for transmission. A third servo motor (742) for driving the synchronous wheel (74) to rotate is fixedly installed on the housing (71).

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