CT stress arm low-pressure casting device and casting method

Abstract

The invention belongs to the technical field of low-pressure casting, and particularly discloses a CT stress arm low-pressure casting device and method. The CT stress arm low-pressure casting device comprises an equipment body, a fixed platform is arranged on the equipment body, a casting mold mechanism is arranged at the top of the fixed platform, a heat preservation furnace is arranged at the bottom of the fixed platform, and a material taking mechanism is arranged on the equipment body. The position of a moving block can be adjusted through an adjusting structure, the area of the material taking disc is increased, meanwhile, the moving block drives a baffle to move when moving, castings can be pushed to move to the center of the material taking disc through the action of a third electric push rod and the adjusting block, the material taking disc can receive castings of different sizes and enable the castings to be located in the center of the material taking disc, and the casting taking efficiency is improved. And therefore, vibration generated in the operation process of the equipment body can be prevented, castings which are not matched with the material taking disc can be prevented from moving or deviating, and the casting material taking efficiency and the casting quality of the castings can be improved conveniently.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of low-pressure casting, and particularly relates to a CT stress arm low-pressure casting device and a casting method. BACKGROUND

[0002] The CT stress arm is a core mechanical support and transmission component in a CT (computed tomography) device, mainly undertakes the functions of "supporting key scanning components and realizing precise motion control", is a key structural component for guaranteeing the scanning precision, stability and safety of the CT device, and directly influences the CT image quality and device operation reliability. The CT stress arm low-pressure casting device is a special device body for producing the stress arm component in the CT device, and comprises a support structure, a casting mechanism, a discharging device, a crucible and a liquid lifting system, a gas pressure system and a cooling mechanism. Liquid alloy is pressed into a mold cavity of the casting mechanism from bottom to top under the action of pressure, and the casting is obtained after cooling and solidification through the cooling mechanism.

[0003] In the prior art, when the casting is completed, the discharging device needs to unload the casting in the mold for taking by the taking disc, but in the use process, the taking disc cannot take castings of different sizes, and when the device body produces vibration during operation, the castings that are not matched with the taking disc move or deviate, thereby affecting the efficiency of taking the castings and the quality of casting the castings. SUMMARY

[0004] In view of the above problems, the application provides a CT stress arm low-pressure casting device to solve the problems in the background art.

[0005] To achieve the above object, the application provides the following technical scheme. A CT stress arm low-pressure casting device comprises a device body, a fixed platform is arranged on the device body, a casting mechanism is arranged on the top of the fixed platform, a holding furnace is arranged on the bottom of the fixed platform, and a taking mechanism is arranged on the device body. The taking mechanism comprises a first mounting plate, a moving support structure, a support plate, a fixed block, a taking disc, a moving block and an adjusting structure, the first mounting plate is fixedly connected to the device body, the moving support structure is connected to the device body through the first mounting plate, the moving support structure is provided with the support plate at the end away from the device body, the support plate is fixedly connected with the fixed block at the top, the fixed block is provided with the taking disc at the top, the support plate and the fixed block are provided with the moving block outside, the moving block is located at the bottom of the taking disc, the fixed block is provided with a groove outside, and the fixed block and the support block are provided with the adjusting structure inside, and the moving block is connected with the adjusting structure through the groove.

[0006] Further, the casting mechanism comprises a first mold, a second mold, a third mold, a connecting plate, a support frame, a first electric push rod and a second electric push rod, the first mold and the second mold are symmetrically arranged on the top of the fixed platform, the first mold and the second mold are fixedly connected with the connecting plate on the side away from each other, the connecting plate is fixedly connected with the first electric push rod, the bottom of the connecting plate is fixedly connected with the fixed platform, the bottom of the first mold and the second mold is slidably connected with the fixed platform, the top of the first mold and the second mold is provided with the third mold, the top of the third mold is fixedly connected with the second electric push rod, the second electric push rod penetrates through the top of the equipment body and is fixedly connected with the support frame, the support frame is fixedly connected with the top of the equipment body, the top of the heat preservation furnace is fixedly connected with the liquid lifting pipe, and the top of the liquid lifting pipe is fixedly connected with the fixed platform.

[0007] Further, the moving support structure comprises a first motor, a second mounting plate, an electric telescopic rod, a fixed rod, a support rod, a connecting rod, a first compression spring and a connecting structure, the first motor is fixedly connected on the top of the first mounting plate, the output end of the first motor is fixedly connected with the electric telescopic rod through the second mounting plate, the second mounting plate is fixedly connected with the equipment body, the top of the electric telescopic rod is fixedly connected with the fixed rod, the fixed rod is connected with the support plate and the material taking disc through the limiting structure on one side, the bottom of the electric telescopic rod is fixedly connected with the support rod, the end of the support rod away from the electric telescopic rod is fixedly connected with the bottom of the support plate, the connecting rod is fixedly connected between the fixed rod and the support rod, and the first compression spring is sleeved on the connecting rod.

[0008] Further, the connecting structure comprises a connecting block, a limiting plate, a plug rod, a moving rod and a connecting spring, one side of the connecting block is fixedly connected with the fixed rod, the other side is fixedly connected with the outer side of the support plate, the top of the connecting block is slidably connected with the limiting plate, the side away from the fixed rod of the limiting plate is attached to the outer side of the material taking disc and the support plate, one side of the plug rod is fixedly connected with the plug rod, the other side is fixedly connected with the moving rod, the plug rod is inserted with the material taking disc, the side close to the connecting block of the fixed rod is provided with a limiting groove, the moving rod extends into the limiting groove through the connecting block, the connecting spring is sleeved on the outer side of the moving rod, and the two ends of the connecting spring are fixedly connected with the connecting block and the inner wall of the limiting groove respectively.

[0009] Further, the moving block is arc-shaped, and the number of the moving blocks is four, the moving blocks are arranged in a circular array with the center fixed block between the support plate and the material taking disc, the moving grooves are arranged at both ends of the moving block, the movable blocks are slidably connected in the moving grooves, the magnetic blocks are fixedly connected at one end of the movable blocks, the adjacent two magnetic blocks are magnetically connected, the second compression spring is arranged on the outer side of the movable block, one end of the second compression spring is fixedly connected with the inner wall of the movable groove, and the other end is fixedly connected with the magnetic block.

[0010] Furthermore, the adjustment structure includes a second motor, a rotating rod, a movable plate, a limiting rod, and a push plate. The output end of the second motor is fixedly connected to the rotating rod, and the top of the rotating rod is rotatably connected to the inner wall of the top of the fixed block. The end of the rotating rod near the second motor is threadedly connected to the movable plate, and the limiting rod is movably connected to the movable plate. The top of the movable plate is hinged to the push plate, and one end of the push plate passes through a groove and is hinged to the movable block.

[0011] Furthermore, the support plate is connected to the middle of the fixed block, the bottom of the second motor is fixedly connected to the inner wall of the bottom of the support plate, the two ends of the limiting rod are fixedly connected to the inner walls of the support plate and the fixed block respectively, the limiting rod is located on both sides of the rotating rod, the movable plate has an opening, the opening penetrates the top of the fixed block, and a supporting limiting structure is provided inside the opening.

[0012] Furthermore, the supporting and limiting structure includes a telescopic rod, a third compression spring, a movable plate, a pushing block, and a limiting block. Telescopic rods are provided on both sides of the limiting rod. The telescopic rods are located inside the movable opening. The bottom of the telescopic rod is fixedly connected to the bottom inner wall of the support plate. The bottom end of the telescopic rod passes through the movable opening and is fixedly connected to the bottom of the material receiving tray. A third compression spring is sleeved on the outside of the telescopic rod. The two ends of the third compression spring are fixedly connected to the bottom of the movable plate and the bottom inner wall of the support plate, respectively. A pushing block is hinged to one side of the movable plate on the left side of the movable plate. A limiting block is hinged to the bottom end of the pushing block. The limiting block is slidably connected to the bottom inner wall of the support plate. One end of the limiting block passes through the support plate and is inserted into the connecting block near the fixed rod.

[0013] Furthermore, a baffle is provided on the top of the material receiving tray, the number of baffles being the same as the number of moving blocks. A slider is fixedly connected to the bottom of the baffle. A moving opening is provided on the top of the material receiving tray, located at the bottom of the baffle. The bottom of the slider is fixedly connected to the top of the moving block, and the slider is slidably connected to the inner wall of the moving opening. An installation groove is provided on one side of the baffle, and a third electric push rod is fixedly connected in the installation groove. An adjustment block is fixedly connected to one end of the third electric push rod.

[0014] The present invention also provides a casting method for a low-pressure casting device for a CT arm, the casting method being applied to the aforementioned low-pressure casting device for a CT arm, comprising the following steps: Step 1: Melt the raw materials, inspect, clean and preheat the mold, transfer the refined qualified aluminum alloy liquid to the holding furnace, adjust the temperature of the molten metal to the range required by the casting process, start the casting mechanism to make the first mold, the second mold and the third mold close, and then according to the set filling speed and pressure, make the molten metal fill the cavity through the riser pipe for crystallization and pressure holding. Step 2: After the pressure holding is completed, the pressure is released and the mold is opened. The moving support structure is activated to move the material pick-up plate to the bottom of the third mold. According to the size of the casting, the moving block and the connecting structure are moved by the adjustment structure, so that the moving block moves to the outside of the support plate and the material pick-up plate, increasing the area of ​​the material pick-up plate. The connecting structure limits the fixed rod, so that the support plate, the fixed block and the material pick-up plate remain stable. When the moving block moves, it drives the baffle and the adjusting block to move, and adjusts the position of the baffle and the adjusting block. Step 3: Use the unloading mechanism to drop the casting onto the pick-up plate, protect it with a baffle, and reduce the impact force of the casting on the pick-up plate by the supporting and limiting structure. Then, activate the third electric push rod to drive the adjusting block to move, so that the adjusting block pushes the casting to the center of the pick-up plate. After the pick-up plate receives the casting, remove the casting. Step 4: Clean the casting by removing the gates and risers to make the surface of the casting flat and smooth. After casting is completed, heat treat the casting. During the heat treatment process, add a structure to connect the end face. After heat treatment, saw it open. After heat treatment, add shaping, CNC machining and quality inspection.

[0015] The technical effects and advantages of this invention are as follows: 1. This invention allows for adjustment of the position of the moving block by adjusting the structure, increasing the area of ​​the material receiving tray. Simultaneously, the moving block moves the baffle, preventing castings from falling onto the tray. Furthermore, the third electric push rod, acting in conjunction with the adjusting block, pushes the casting to the center of the tray, enabling the tray to receive castings of different sizes and position them at the center. This prevents vibrations during operation from causing castings that are incompatible with the tray to move or shift, thus preventing them from falling and being damaged. This, in turn, improves the efficiency of casting material handling and the quality of casting production.

[0016] 2. This invention uses a movable support structure to support and fix the material receiving tray. When the adjusting structure moves the moving block, the moving structure can limit the fixing rod. When the material receiving tray picks up the casting, the material receiving tray is subjected to the impact force of the casting, which squeezes the material receiving tray. The support and limiting structure buffers the force on the material receiving tray and limits the connecting block, further improving the effect of the fixing rod in supporting and fixing the support plate, fixing block and material receiving tray, thereby improving the stability and service life of the material receiving tray and facilitating the picking of castings. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a structural diagram of the rear side of the device body according to an embodiment of the present invention; Figure 3 This is a structural diagram of the material handling structure according to an embodiment of the present invention; Figure 4 This is a structural diagram of the movable support structure, material picking tray, baffle and adjusting block according to an embodiment of the present invention; Figure 5 This is a structural diagram of the fixed rod, the moving structure, and the material picking tray according to an embodiment of the present invention; Figure 6 This is an internal structural diagram of the support plate and fixing block according to an embodiment of the present invention; Figure 7 This is a structural diagram of the adjustment structure and the support limiting structure according to an embodiment of the present invention; Figure 8 This is a structural diagram of the moving block according to an embodiment of the present invention; Figure 9 This is a physical diagram of an embodiment of the present invention.

[0018] In the diagram: 1. Equipment body; 2. Insulation furnace; 3. Support plate; 4. Fixed block; 5. Material handling tray; 6. Moving block; 7. First mold; 8. Second mold; 9. Third mold; 10. Second electric push rod; 11. First motor; 12. Electric telescopic rod; 13. Fixed rod; 14. First compression spring; 15. Support rod; 16. Connecting rod; 17. Connecting block; 18. Limiting plate; 19. Insert rod; 20. Moving rod; 21. Movable block; 22. Magnetic block; 23. Second motor; 24. Moving plate; 25. Push plate; 26. Telescopic rod; 27. Third compression spring; 28. Movable plate; 29. ​​Push block; 30. Limiting block; 31. Baffle; 32. Slider; 33. Third electric push rod; 34. Adjusting block. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0020] This invention provides a low-pressure casting device for a CT force arm, such as... Figures 1 to 9As shown, the device includes a main body 1, a fixed platform on the main body 1, a casting mechanism on the top of the fixed platform, a riser pipe fixedly connected to the top of the holding furnace 2, the top of the riser pipe being fixedly connected to the fixed platform, and the holding furnace 2 being located at the bottom of the fixed platform. A material handling mechanism is also provided on the main body 1. The material handling mechanism includes a first mounting plate, a movable support structure, a support plate 3, a fixed block 4, a material handling plate 5, a movable block 6, and an adjustment structure. The first mounting plate is fixedly connected to the main body 1. The movable support structure is connected to the main body 1 via the first mounting plate. A support plate 3 is located at the end of the movable support structure furthest from the main body 1. A fixed block 4 is fixedly connected to the top of the support plate 3. A material handling plate 5 is located on the top of the fixed block 4. A movable block 6 is located on the top of the support plate 3 and the outside of the fixed block 4, with the movable block 6 positioned at the bottom of the material handling plate 5. A groove is formed on the outside of the fixed block 4. The fixed block 4 and the support plate 3 are connected in series. The support block has an adjustment structure inside. The moving block 6 is connected to the adjustment structure through a groove. The casting mechanism includes a first mold 7, a second mold 8, a third mold 9, a connecting plate, a support frame, a first electric push rod, and a second electric push rod 10. The first mold 7 and the second mold 8 are symmetrically arranged on the top of the fixed platform. The first mold 7 and the second mold 8 are fixedly connected to the side away from each other. The first electric push rod is fixedly connected to the connecting plate. The bottom of the connecting plate is fixedly connected to the fixed platform. The bottom of the first mold 7 and the second mold 8 are slidably connected to the fixed platform. The third mold 9 is arranged on the top of the first mold 7 and the second mold 8. The second electric push rod 10 is fixedly connected to the top of the third mold 9. The second electric push rod 10 passes through the top of the equipment body 1 and is fixedly connected to the support frame. The support frame is fixedly connected to the top of the equipment body 1. The equipment body 1 is located on the top of the third mold 9 and has an unloading mechanism.

[0021] like Figures 2 to 4 As shown, the movable support structure includes a first motor 11, a second mounting plate, an electric telescopic rod 26, a fixed rod 13, a support rod 15, a connecting rod 16, a first compression spring 14, and a connecting structure. The first motor 11 is fixedly connected to the top of the first mounting plate. The output end of the first motor 11 passes through the second mounting plate and is fixedly connected to the electric telescopic rod 26. The second mounting plate is fixedly connected to the equipment body 1. The top of the electric telescopic rod 26 is fixedly connected to the fixed rod 13. One side of the fixed rod 13 is connected to the support plate 3 and the material picking tray 5 through a limiting structure. The bottom end of the electric telescopic rod 26 is fixedly connected to the support rod 15. The end of the support rod 15 away from the electric telescopic rod 26 is fixedly connected to the bottom of the support plate 3. A connecting rod 16 is fixedly connected between the fixed rod 13 and the support rod 15. The first compression spring 14 is sleeved on the connecting rod 16.

[0022] The first mounting plate facilitates the fixing of the first motor 11 to the equipment body 1, while the second mounting plate facilitates the mounting of the electric telescopic rod 26 on the first motor 11, ensuring stability when the first motor 11 drives the electric telescopic rod 26 to rotate. The electric telescopic rod 26 drives the fixed rod 13 to move, thereby allowing the fixed rod 13 to adjust the height of the support plate 3, the fixed block 4, and the material picking plate 5 for easy material picking. The support rod 15 is connected to the support plate 3 and the electric telescopic rod 26, and the support rod 15 and the connecting rod 16 can raise the fixed rod. The stability of the connection between the support plate 3, the fixing block 4 and the material picking plate 5 is achieved through the first compression spring 14, which connects to the fixing rod 13 and the support rod 15 via the connecting rod 16. When the first motor 11 drives the electric telescopic rod 26 to rotate, it drives the support rod 15, the connecting rod 16 and the fixing rod 13 to rotate, so that the fixing rod 13 drives the connecting structure to rotate with the support plate 3, the fixing block 4 and the material picking plate 5. This allows the material picking plate 5 to move stably to the bottom of the third mold 9, facilitating the receiving of castings and improving the stability of casting receiving.

[0023] like Figures 4 to 5 As shown, the connection structure includes a connecting block 17, a limiting plate 18, an insert rod 19, a moving rod 20, and a connecting spring. One side of the connecting block 17 is fixedly connected to the fixed rod 13, and the other side is fixedly connected to the outer side of the support plate 3. The limiting plate 18 is slidably connected to the top of the connecting block 17. The side of the limiting plate 18 away from the fixed rod 13 is in contact with the material picking tray 5 and the outer side of the support plate 3. One side of the insert rod 19 is fixedly connected to the insert rod 19, and the other side is fixedly connected to the moving rod 20. The insert rod 19 is inserted into the material picking tray 5. The fixed rod 13 has a limiting groove on the side near the connecting block 17. The moving rod 20 passes through the connecting block 17 and extends into the limiting groove. A connecting spring is sleeved on the outer side of the moving rod 20. The two ends of the connecting spring are fixedly connected to the connecting block 17 and the inner wall of the limiting groove, respectively.

[0024] Through the action of connecting block 17, limiting plate 18, and insert rod 19, the connection between fixing rod 13, support plate 3, and material picking tray 5 remains stable. When the adjusting structure drives moving block 6 to move outward from material picking tray 5 and support plate 3, moving block 6 pushes limiting plate 18 to move towards fixing rod 13, causing insert rod 19 to separate from limiting plate 18. This causes limiting plate 18 to drive moving rod 20 to move towards limiting groove, compressing connecting spring. When moving block 6 moves to the outside of material picking tray 5 and support plate 3, one side of limiting plate 18 fits against connecting block 17, and moving rod 20 moves into limiting groove. The action of limiting plate 18 and connecting spring limits moving block 6 and presses against fixing rod 13, thus facilitating the stability of material picking tray 5 installation.

[0025] like Figures 6 to 8As shown, the adjustment structure includes a second motor 23, a rotating rod, a movable plate 24, a limiting rod, and a push plate 25. The output end of the second motor 23 is fixedly connected to the rotating rod, and the top of the rotating rod is rotatably connected to the inner wall of the top of the fixed block 4. The end of the rotating rod near the second motor 23 is threadedly connected to the movable plate 24, and the limiting rod is movably connected to the movable plate 24. The top of the movable plate 24 is hinged to the push plate 25, and one end of the push plate 25 passes through a groove and is hinged to the movable block 6. The support plate 3 is connected to the middle of the fixed block 4. The bottom of the second motor 23 is fixedly connected to the inner wall of the bottom of the support plate 3. The two ends of the limiting rod are fixedly connected to the inner walls of the support plate 3 and the fixed block 4, respectively. The limiting rod is located on both sides of the rotating rod. The movable plate 24 has an opening that passes through the top of the fixed block 4. A supporting limiting structure is provided inside the opening. The movable block 6 is arc-shaped and there are four of them. The movable blocks 6 are located between the support plate 3 and the material picking plate 5 and are arranged in a circular array around the center of the fixed block 4. Both ends of the movable block 6 have a moving groove. A movable block 21 is slidably connected in the moving groove. A magnetic block 22 is fixedly connected to one end of the movable block 21. Two adjacent magnetic blocks 22 are magnetically connected. A second compression spring is provided on the outside of the movable block 21. One end of the second compression spring is fixedly connected to the inner wall of the moving groove, and the other end is fixedly connected to the magnetic block 22.

[0026] When the size of the material receiving tray 5 needs to be adjusted, the second motor 23 is first started to drive the rotating rod to rotate along the inner wall of the top of the fixed block 4. Through the limiting action of the limiting rod, the moving plate 24 moves upward along the rotating rod and squeezes the pushing plate 25, causing one end of the pushing plate 25 to deflect. Through the groove, the moving block 6 is pushed to move along the top of the support plate 3, causing the moving block 6 to move to the outside of the support plate 3 and the material receiving tray 5. When the moving block 6 moves, it pushes the connecting structure to move. After the moving block 6 has moved, through the magnetic attraction of the magnetic block 22, the movable block 21 moves to the outside of the moving block 6 along the moving groove. The second compression spring is stretched, which causes the magnetic block 22 to attract each other, so that the two adjacent moving blocks 6 are connected together, thereby increasing the area of ​​the material receiving tray 5. This allows the material receiving tray 5 to pick up castings of different sizes, improves the applicability of the material receiving tray 5, eliminates the need for frequent replacement of the material receiving tray 5, and improves the material receiving effect.

[0027] like Figures 6 to 7As shown, the supporting and limiting structure includes a telescopic rod 26, a third compression spring 27, a movable plate 28, a push block 29, and a limiting block 30. Telescopic rods 26 are provided on both sides of the limiting rod. The telescopic rods 26 are located inside the movable opening. The bottom of the telescopic rods 26 is fixedly connected to the bottom inner wall of the support plate 3. The bottom end of the telescopic rods 26 passes through the movable opening and is fixedly connected to the bottom of the material receiving tray 5. The third compression spring 27 is sleeved on the outside of the telescopic rods 26. The two ends of the third compression spring 27 are fixedly connected to the bottom of the movable plate 28 and the bottom inner wall of the support plate 3, respectively. A push block 29 is hinged to one side of the movable plate 28 on the left side of the movable plate 24. A limiting block 30 is hinged to the bottom end of the push block 29. The push block 29 is located on the left side of the telescopic rod 26 away from the limiting rod and is inclined. The limiting block 30 is slidably connected to the bottom inner wall of the support plate 3. One end of the limiting block 30 passes through the support plate 3 and is inserted into the connecting block 17 near the fixed rod 13.

[0028] When the casting falls onto the pick-up plate 5, the impact of the falling casting on the pick-up plate 5 causes the telescopic rod 26 at its bottom to retract, thereby squeezing the third compression spring 27 and reducing the impact on the pick-up plate 5. When the telescopic rod 26 retracts, it drives the movable plate 28 to move downward. Since the two ends of the push block 29 are hinged to the movable plate 28 and the limiting block 30 respectively, and the push block 29 is set at an angle, when the movable plate 28 moves downward, it causes the push block 29 to deflect, causing one end of the push plate 25 to push... The movable limiting block 30 moves along the bottom inner wall of the support plate 3, so that the limiting block 30 passes through one side of the support plate 3 and is inserted into the connecting block 17, which buffers the material picking plate 5 and also fixes the connecting block 17, improving the stability of the connection between the fixing rod 13, the connecting block 17, the limiting plate 18, the support plate 3, the fixing block 4, and the material picking plate 5. This makes it easier for the material picking plate 5 to pick up the casting and prevents the material picking plate 5 from being unstable in connection with the fixing rod 13, causing the casting to fall and affecting the casting effect.

[0029] like Figures 3 to 5 As shown, a baffle 31 is provided on the top of the material receiving tray 5. The number of baffles 31 is the same as the number of moving blocks 6. A slider 32 is fixedly connected to the bottom of the baffle 31. A moving opening is provided on the top of the material receiving tray 5. The moving opening is located at the bottom of the baffle 31. The bottom of the slider 32 is fixedly connected to the top of the moving block 6. The slider 32 is slidably connected to the inner wall of the moving opening. An installation groove is provided on one side of the baffle 31. A third electric push rod 33 is fixedly connected in the installation groove. An adjusting block 34 is fixedly connected to one end of the third electric push rod 33.

[0030] The baffle 31 can block and protect the castings on the pick-up plate 5 to prevent them from falling. When the moving block 6 moves, it drives the slider 32 to move along the moving opening, so that the slider 32 drives the baffle 31, the third electric push rod 33, and the adjusting block 34 to move simultaneously, thereby accommodating castings of different sizes. When the casting falls onto the pick-up plate 5, the baffle 31 is positioned outside the casting for protection. By activating the third electric push rod 33, the adjusting block 34 is pushed to move, so that the adjusting block 34 pushes the casting to move and adjust the position of the casting so that the casting is located in the middle position of the pick-up plate 5, further preventing the casting from shifting or falling, which would be inconvenient for subsequent processing of the casting.

[0031] A casting method for a low-pressure casting device for a CT arm, the casting method being applied to the aforementioned low-pressure casting device for a CT arm, includes the following steps: Step 1: Melt the raw materials, inspect, clean and preheat the mold, transfer the refined qualified aluminum alloy liquid to the holding furnace 2, adjust the temperature of the molten metal to the range required by the casting process, start the casting mechanism so that the first mold 7, the second mold 8 and the third mold 9 are closed, so that the molten metal fills the cavity through the riser pipe, and crystallizes and holds pressure. Step 2: After the pressure holding is completed, the pressure is released and the mold is opened. The moving support structure is activated to move the material taking plate 5 to the bottom of the third mold 9. According to the size of the casting, the moving block 6 and the connecting structure are moved by the adjustment structure, so that the moving block 6 moves to the outside of the support plate 3 and the material taking plate 5, increasing the area of ​​the material taking plate 5. The connecting structure limits the fixing rod 13, so that the support plate 3, the fixing block 4 and the material taking plate 5 remain stable. When the moving block 6 moves, it drives the baffle 31 and the adjusting block 34 to move, adjusting the position of the baffle 31 and the adjusting block 34. Step 3: The casting is dropped onto the pick-up plate 5 using the unloading mechanism and protected by the baffle 31. At the same time, the impact force of the casting on the pick-up plate 5 is reduced by the supporting and limiting structure, and the connecting structure is further limited. Then, the third electric push rod 33 is activated to drive the adjusting block 34 to move, so that the adjusting block 34 pushes the casting to the center of the pick-up plate 5. After the pick-up plate 5 receives the casting, the casting is taken out. Step 4: Clean the casting by removing the gates and risers to make the surface of the casting flat and smooth. After casting is completed, heat treat the casting. During the heat treatment process, add a structure to connect the end face. After heat treatment, saw it open. After heat treatment, add shaping, CNC machining and quality inspection.

[0032] Working principle of this invention: Reference Figures 1 to 9As shown, during use, the raw materials are melted, the mold is inspected, cleaned, and preheated, and the refined aluminum alloy liquid is transferred to the holding furnace 2. The temperature of the molten metal is adjusted to the range required by the casting process. The first electric push rod pushes the first mold 7 and the second mold 8 to move along the top of the fixed platform, so that the first mold 7 and the second mold 8 fit together. The second electric push rod 10 is activated to drive the third mold 9 to move downward and close with the first mold 7 and the second mold 8. The liquid lifting system and the air pressure system are used to fill the mold at the set filling speed and pressure, so that... The molten metal is smoothly filled into the mold cavity through the riser pipe. After the cavity is filled, it is held under pressure according to the set crystallization pressure and holding time. After the holding time is completed, the pressure is released and the mold is opened through the pneumatic system. The moving support structure is activated to move the material receiving plate 5 to the bottom of the third mold 9. According to the size of the casting, the second motor 23 is activated to drive the rotating rod to rotate along the inner wall of the top of the fixed block 4. Through the limiting action of the limiting rod, the moving plate 24 moves upward along the rotating rod and squeezes the pushing plate 25, causing one end of the pushing plate 25 to deflect and push through the groove. The movable block 6 moves along the top of the support plate 3, causing it to move along the outer side of the support plate 3 and the material picking tray 5. As the movable block 6 moves, it pushes the connecting structure to move. After the movable block 6 has moved, the magnetic attraction of the magnetic block 22 causes the movable block 21 to move along the moving groove towards the outer side of the movable block 6. The second compression spring is stretched, causing the magnetic blocks 22 to attract each other, connecting adjacent movable blocks 6 together and increasing the area of ​​the material picking tray 5. As the movable block 6 moves, it pushes the limiting plate 18 towards the fixed rod 13. This causes the insertion rod 19 to separate from the limiting plate 18, which in turn causes the limiting plate 18 to move the moving rod 20 towards the limiting groove, compressing the connecting spring. When the moving block 6 moves to the outside of the material picking plate 5 and the support plate 3, one side of the limiting plate 18 fits against the connecting block 17, and the moving rod 20 moves into the limiting groove. At the same time, the moving block 6 drives the top slider 32 to move along the moving opening, causing the slider 32 to drive the baffle 31, the third electric push rod 33, and the adjusting block 34 to move simultaneously, so that the baffle 31 can limit and protect castings of different sizes.

[0033] After adjustment, the casting is dropped onto the receiving plate 5 using the unloading mechanism. The falling casting impacts the receiving plate 5, causing the telescopic rod 26 at its bottom to retract, which in turn compresses the third compression spring 27, reducing the impact on the receiving plate 5. When the telescopic rod 26 retracts, it drives the movable plate 28 downwards. Since the pushing block 29 is hinged to the movable plate 28 and the limiting block 30 at both ends, and the pushing block 29 is inclined, when the movable plate 28 moves downwards, it causes the pushing block 29 to deflect, pushing one end of the pushing block 29. The limiting block 30 moves along the bottom inner wall of the support plate 3, so that the limiting block 30 passes through one side of the support plate 3 and is inserted into the connecting block 17. This buffers the material taking plate 5 and also fixes the connecting block 17. Then the casting is taken out, and the casting is cleaned by removing the gate and riser, so that the surface of the casting is flat and smooth. After the casting is completed, the casting is heat treated. During the heat treatment process, a structure is added to connect the end face. After the heat treatment, it is sawn open. After the heat treatment, a shaping action, CNC machining and quality inspection are added.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A low-pressure casting device for a CT arm, comprising a device body, characterized in that: The equipment body is equipped with a fixed platform, a casting mechanism is installed on the top of the fixed platform, and a heat preservation furnace is installed at the bottom of the fixed platform. The equipment body is also equipped with a material handling mechanism. The material handling mechanism includes a first mounting plate, a movable support structure, a support plate, a fixed block, a material handling plate, a movable block, and an adjustment structure. The first mounting plate is fixedly connected to the equipment body. The movable support structure is connected to the equipment body through the first mounting plate. A support plate is installed at the end of the movable support structure away from the equipment body. A fixed block is fixedly connected to the top of the support plate. A material handling plate is installed on the top of the fixed block. A movable block is installed on the top of the support plate and the outside of the fixed block. The movable block is located at the bottom of the material handling plate. A groove is opened on the outside of the fixed block. An adjustment structure is installed inside the fixed block and the support block. The movable block is connected to the adjustment structure through the groove.

2. The CT force-bearing arm low-pressure casting device according to claim 1, characterized in that: The casting mechanism includes a first mold, a second mold, a third mold, a connecting plate, a support frame, a first electric push rod, and a second electric push rod. The first mold and the second mold are symmetrically arranged on the top of the fixed platform. The first mold and the second mold are fixedly connected to the side of each other. The first electric push rod is fixedly connected to the connecting plate. The bottom of the connecting plate is fixedly connected to the fixed platform. The bottom of the first mold and the second mold are slidably connected to the fixed platform. The third mold is arranged on top of the first mold and the second mold. The top of the third mold is fixedly connected to the second electric push rod. The second electric push rod passes through the top of the equipment body and is fixedly connected to the support frame. The support frame is fixedly connected to the top of the equipment body. A riser pipe is fixedly connected to the top of the heat preservation furnace. The top of the riser pipe is fixedly connected to the fixed platform.

3. The CT force-bearing arm low-pressure casting device according to claim 2, characterized in that: The mobile support structure includes a first motor, a second mounting plate, an electric telescopic rod, a fixed rod, a support rod, a connecting rod, a first compression spring, and a connecting structure. The first motor is fixedly connected to the top of the first mounting plate. The output end of the first motor passes through the second mounting plate and is fixedly connected to the electric telescopic rod. The second mounting plate is fixedly connected to the equipment body. A fixed rod is fixedly connected to the top of the electric telescopic rod. One side of the fixed rod is connected to the support plate and the material handling tray through a limiting structure. A support rod is fixedly connected to the bottom of the electric telescopic rod. The end of the support rod away from the electric telescopic rod is fixedly connected to the bottom of the support plate. A connecting rod is fixedly connected between the fixed rod and the support rod. A first compression spring is sleeved on the connecting rod.

4. The CT force-bearing arm low-pressure casting device according to claim 3, characterized in that: The connecting structure includes a connecting block, a limiting plate, an insert rod, a moving rod, and a connecting spring. One side of the connecting block is fixedly connected to a fixed rod, and the other side is fixedly connected to the outer side of a support plate. A limiting plate is slidably connected to the top of the connecting block. The side of the limiting plate away from the fixed rod is in contact with the material picking tray and the outer side of the support plate. An insert rod is fixedly connected to one side of the insert rod, and a moving rod is fixedly connected to the other side. The insert rod is inserted into the material picking tray. A limiting groove is opened on the side of the fixed rod near the connecting block. The moving rod passes through the connecting block and extends into the limiting groove. A connecting spring is sleeved on the outer side of the moving rod. The two ends of the connecting spring are fixedly connected to the inner wall of the connecting block and the limiting groove, respectively.

5. The CT force-bearing arm low-pressure casting device according to claim 4, characterized in that: The movable blocks are arc-shaped and there are four of them. The movable blocks are located between the support plate and the material picking plate and are arranged in a circular array with the fixed block as the center. Both ends of the movable blocks are provided with movable grooves. Movable blocks are slidably connected in the movable grooves. A magnetic block is fixedly connected to one end of the movable block. Adjacent magnetic blocks are magnetically connected. A second compression spring is provided on the outside of the movable block. One end of the second compression spring is fixedly connected to the inner wall of the movable groove, and the other end is fixedly connected to the magnetic block.

6. The CT force-bearing arm low-pressure casting device according to claim 5, characterized in that: The adjustment structure includes a second motor, a rotating rod, a movable plate, a limiting rod, and a push plate. The output end of the second motor is fixedly connected to the rotating rod, and the top of the rotating rod is rotatably connected to the inner wall of the top of the fixed block. The end of the rotating rod near the second motor is threadedly connected to the movable plate, and the limiting rod is movably connected to the movable plate. The top of the movable plate is hinged to the push plate, and one end of the push plate passes through a groove and is hinged to the movable block.

7. The CT force-bearing arm low-pressure casting device according to claim 6, characterized in that: The support plate is connected to the middle of the fixed block. The bottom of the second motor is fixedly connected to the inner wall of the bottom of the support plate. The two ends of the limiting rod are fixedly connected to the inner walls of the support plate and the fixed block, respectively. The limiting rod is located on both sides of the rotating rod. The movable plate has an opening that passes through the top of the fixed block. A supporting limiting structure is provided inside the opening.

8. The CT force-bearing arm low-pressure casting device according to claim 7, characterized in that: The supporting and limiting structure includes a telescopic rod, a third compression spring, a movable plate, a push block, and a limiting block. Telescopic rods are provided on both sides of the limiting rod. The telescopic rods are located inside the movable opening. The bottom of the telescopic rod is fixedly connected to the bottom inner wall of the support plate. The bottom end of the telescopic rod passes through the movable opening and is fixedly connected to the bottom of the material receiving tray. A third compression spring is sleeved on the outside of the telescopic rod. The two ends of the third compression spring are fixedly connected to the bottom of the movable plate and the bottom inner wall of the support plate, respectively. A push block is hinged to one side of the movable plate on the left side of the movable plate. A limiting block is hinged to the bottom end of the push block. The limiting block is slidably connected to the bottom inner wall of the support plate. One end of the limiting block passes through the support plate and is inserted into the connecting block near the fixed rod.

9. The CT force-bearing arm low-pressure casting device according to claim 8, characterized in that: The top of the material receiving tray is equipped with a baffle, the number of which is the same as the number of moving blocks. A slider is fixedly connected to the bottom of the baffle. A moving opening is opened on the top of the material receiving tray, located at the bottom of the baffle. The bottom of the slider is fixedly connected to the top of the moving block, and the slider is slidably connected to the inner wall of the moving opening. An installation groove is opened on one side of the baffle, and a third electric push rod is fixedly connected in the installation groove. An adjustment block is fixedly connected to one end of the third electric push rod.

10. A casting method for a low-pressure casting device for a CT force arm, characterized in that, The application of the CT force arm low-pressure casting device according to claim 9 includes the following steps: Step 1: Melt the raw materials, inspect, clean and preheat the mold, transfer the refined qualified aluminum alloy liquid to the holding furnace, adjust the temperature of the molten metal to the range required by the casting process, start the casting mechanism to make the first mold, the second mold and the third mold close, and then according to the set filling speed and pressure, make the molten metal fill the cavity through the riser pipe for crystallization and pressure holding. Step 2: After the pressure holding is completed, the pressure is released and the mold is opened. The moving support structure is activated to move the material pick-up plate to the bottom of the third mold. According to the size of the casting, the moving block and the connecting structure are moved by the adjustment structure, so that the moving block moves to the outside of the support plate and the material pick-up plate, increasing the area of ​​the material pick-up plate. The connecting structure limits the fixed rod, so that the support plate, the fixed block and the material pick-up plate remain stable. When the moving block moves, it drives the baffle and the adjusting block to move, and adjusts the position of the baffle and the adjusting block. Step 3: Use the unloading mechanism to drop the casting onto the pick-up plate, protect it with a baffle, and reduce the impact force of the casting on the pick-up plate by the support and limiting structure. Then, activate the third electric push rod to drive the adjusting block to move, so that the adjusting block pushes the casting to the center of the pick-up plate. After the pick-up plate receives the casting, remove the casting. Step 4: Clean the casting by removing the gates and risers to make the surface of the casting flat and smooth. After casting is completed, heat treat the casting. During the heat treatment process, add a structure to connect the end face. After heat treatment, saw it open. After heat treatment, add shaping, CNC machining and quality inspection.

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