A method for developing high-precision corrosion-resistant medical aluminum alloy profiles

Abstract

The present invention relates to the technical field of aluminum profile manufacturing, and discloses a method for developing high-precision corrosion-resistant medical aluminum alloy profiles, including a smelting furnace and a refining furnace arranged up and down, a winch is also provided above the smelting furnace, and a pull rope, a traction rope and a blanking rope are wound on the output end of the winch, the other end of the pull rope is connected to the bottom end of the smelting furnace, and the other end of the traction rope is connected to the top of the refining furnace. When the smelting furnace is turned over and unloaded, the refining furnace rises synchronously, and a graphite cylinder for evenly dropping graphite powder into the refining furnace along with the turning of the smelting furnace is also provided above the smelting furnace, and the bottom end of the graphite cylinder is connected to a blanking cone adapted to the unloading speed of the smelting furnace, and a blanking piston for controlling the graphite powder discharge rate is provided in the blanking cone, and the other end of the blanking rope is connected to the blanking piston. Compared with the prior art, the present application solves a series of problems such as low efficiency and poor safety in the process of aluminum alloy development.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum profile manufacturing, and in particular to a method for preparing a high-precision corrosion-resistant medical aluminum alloy profile. Background Art

[0002] Aluminum products are made of aluminum and other alloy elements. The main metal element is aluminum, and some alloy elements are added to improve the performance of aluminum. Usually, it is first processed into castings, forgings, foils, plates, strips, tubes, rods, profiles, etc., and then made through cold bending, sawing, drilling, assembly, coloring and other processes. The shells, brackets, bases, partitions, tools, etc. of a wide variety of medical devices and instruments are made of high-quality aluminum alloy precision profiles, pipes and wires, as well as high-surface plates.

[0003] In the prior art, the aluminum profile manufacturing process needs to go through two steps of melting and refining. In the refining step, inert gases such as nitrogen or argon need to be introduced. Therefore, melting furnaces and refining furnaces with different structures are needed to melt and refine the aluminum profile development materials respectively. Among them, when the molten raw materials are transferred from the melting furnace to the refining furnace, raw material sputtering is likely to occur due to the height difference between the furnace bodies, which is likely to cause raw material waste and affect safety. Therefore, the present application discloses a high-precision corrosion-resistant medical aluminum alloy profile development method to meet the aluminum alloy development needs required for medical devices. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides a method for developing high-precision corrosion-resistant medical aluminum alloy profiles, which has the advantages of optimizing the aluminum alloy smelting efficiency and solving a series of problems such as low efficiency and poor safety in the aluminum alloy development process.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solution: a method for preparing a high-precision corrosion-resistant medical aluminum alloy profile, comprising the following steps:

[0008] S1. Melting: Add pure aluminum, pure magnesium and aluminum-silicon alloy into a smelting furnace, heat to above 775°C to completely melt the alloy, then add electrolytic copper, aluminum-zinc alloy, iron-aluminum alloy and aluminum-manganese alloy, continue to heat to above 825°C, and after all the alloy elements are melted, obtain aluminum alloy melt;

[0009] S2, refining: pour the aluminum alloy melt obtained in S1 into a refining furnace, adjust the temperature to 800°C, add graphite powder for refining, let it stand for 8 minutes after refining, remove the surface slag of the aluminum alloy melt, then heat it to 820°C, add a refiner, magnesium-strontium alloy, yttrium-magnesium alloy and aluminum-erbium alloy, pass argon gas for continuous refining, control the gas pressure at 0.35MPa, and degassing time for 15 minutes. After degassing, inspect the composition of the aluminum alloy melt, and after the inspection is qualified, perform a second slag removal to complete the refining process;

[0010] S3, standing: standing the refined aluminum alloy melt until the temperature of the aluminum alloy melt drops to 700°C;

[0011] S4, die casting: preheat the mold to 140° C., spray a water-based mold release agent into the mold cavity, continue to preheat the mold cavity to 240° C., and then inject the aluminum alloy melt processed in step S3 into the mold cavity for die casting;

[0012] S5, solution quenching treatment: quenching heating temperature is 530-550℃, quenching holding time is 60min, quenching transfer time is ≤25s, and parking time after quenching is 3h;

[0013] S6, aging treatment: placing the aluminum alloy die casting after the treatment in step S5 in an aging furnace, and performing three-stage internal stress removal treatment to obtain the final aluminum alloy profile;

[0014] The preparation method of the graphite powder is as follows: adding graphite coarse powder and alumina to concentrated HNO3 to react at room temperature for 2 hours, then heating in a water bath to above 90°C and stirring to react for 30 minutes, diluting with water and filtering, washing the filter cake and drying to obtain graphite powder;

[0015] In the process of developing aluminum alloy profiles using the above steps, high-precision corrosion-resistant medical aluminum alloy profile development equipment is also used, including a smelting furnace and a refining furnace arranged up and down, a winch is also provided above the smelting furnace, and a pull rope, a traction rope and a blanking rope are wound around the output end of the winch, the other end of the pull rope is connected to the bottom end of the smelting furnace, and the other end of the traction rope is connected to the top of the refining furnace. When the smelting furnace is turned over to unload, the refining furnace rises synchronously, and a graphite cylinder is also provided above the smelting furnace for evenly dropping graphite powder into the refining furnace as the smelting furnace is turned over, the bottom end of the graphite cylinder is connected to a blanking cone adapted to the unloading speed of the smelting furnace, a blanking piston for controlling the graphite powder discharge rate is provided in the blanking cone, and the other end of the blanking rope is connected to the blanking piston.

[0016] Preferably, a suspension seat is provided at the top of the smelting furnace, the suspension seat is suspended on a gantry, the winch is installed at the top of the suspension seat, and the suspension seat can slide on the gantry.

[0017] Preferably, upper suspensions are installed on both sides of the suspension seat, a first rotating shaft is connected to the outer wall of the smelting furnace, the first rotating shaft is rotatably sleeved on the bottom end of the upper suspension on the corresponding side, one end of the first rotating shaft passes through the upper suspension on the corresponding side and is connected to a reset disk, a torsion spring is also connected between the reset disk and the upper suspension on the corresponding side, and the torsion spring is sleeved on the corresponding first rotating shaft.

[0018] Preferably, the upper suspension is also connected with a reinforcing rib, the end sliding sleeve of the upper suspension is provided with a vertical guide rod, the outer wall of the refining furnace is connected with a second rotating shaft, the second rotating shaft is rotatably sleeved in the lower suspension on the same side, and the bottom end of the vertical guide rod is connected to the top end of the lower suspension on the same side.

[0019] Preferably, the output end of the winch is connected to a winding roller, and the winding roller is provided with a plurality of different winding grooves, one end of the pull rope, the traction rope and the blanking rope are respectively connected to the corresponding winding grooves, and a plurality of groups of cable guide wheels are installed at the bottom end of the suspension seat. A lifting ring is also connected to the bottom end of the outer wall of the smelting furnace, and one end of the pull rope is connected to the lifting ring after passing around the corresponding cable guide wheel.

[0020] Preferably, the bottom ends of the two traction ropes are arranged in parallel, and are connected to the top ends of the vertical guide rods on the corresponding sides after passing through the corresponding cable guide wheels respectively.

[0021] Preferably, the graphite cylinder is installed on the suspension seat, the bottom end of the blanking cone extends to the bottom of the suspension seat and corresponds to the position of the smelting furnace when it is tilted to discharge the material, and the bottom end of the blanking cone is also connected to a blanking tray for dispersing graphite powder, and the blanking tray is provided with a plurality of evenly distributed discharge holes.

[0022] Preferably, a guide plate is fixedly sleeved on the inner wall of the graphite cylinder, a blanking rod is slidably sleeved on the guide plate, the blanking piston is connected to the bottom end of the blanking rod and is adapted to the inner wall of the bottom end of the blanking cone, and a blanking spring is also sleeved on the blanking rod, and the two ends of the blanking spring are respectively connected to the guide plate and the blanking piston.

[0023] Preferably, an inclined guide wheel is also installed on the suspension seat, and one end of the blanking rope passes around the inclined guide wheel and passes through the graphite cylinder and then is connected to the top end of the blanking rod.

[0024] Preferably, a center rod is connected to the inner wall of the top end of the graphite cylinder, and one end of the blanking rope is wound around the center rod and maintained in a vertical state.

[0025] (III) Beneficial effects

[0026] Compared with the prior art, the present invention provides a method for producing a high-precision corrosion-resistant medical aluminum alloy profile, which has the following beneficial effects:

[0027] 1. The method for developing high-precision corrosion-resistant medical aluminum alloy profiles controls the operation of the winch so that its output end drives the winding roller to rotate, thereby winding the pull rope, the traction rope and the blanking rope. On the one hand, the winding pull rope drives the smelting furnace to flip with the axis of the corresponding first rotating shaft as the axis, and the aluminum alloy solution in the smelting furnace is unloaded into the refining furnace below. At the same time, the refining furnace is synchronously pulled up by the winding traction rope under the guidance of the vertical guide rod. When the smelting furnace flips to the corresponding angle and starts to dump the aluminum alloy solution therein, the aluminum alloy solution is dumped into the refining furnace below. The faster the unloading speed of the aluminum alloy solution is, the more aluminum alloy solution content in the refining furnace is. At the same time, the gradually rising refining furnace can also effectively prevent the solution from splashing out in the refining furnace, which can avoid the waste of raw materials and improve the safety during operation.

[0028] 2. The method for developing high-precision corrosion-resistant medical aluminum alloy profiles drives the pull rope, traction rope and blanking rope to be synchronously wound up by the winding roller. As the pull rope drives the smelting furnace to rotate continuously, the winding of the blanking rope drives the blanking rod to rise synchronously, thereby pulling the blanking piston to gradually move upward, so that the graphite powder falls from the gap between the blanking piston and the inner wall of the blanking cone to the blanking plate, and is evenly dispersed in the refining furnace through the discharge holes thereon. As the aluminum alloy solution is continuously dropped, the graphite powder is covered and stirred, thereby improving the dispersion of the graphite powder. In addition, due to the conical setting of the blanking cone, when the blanking piston continues to move upward, the faster the graphite powder is discharged, the faster it is matched with the dumping speed of the smelting furnace, thereby optimizing the homogeneous dispersion effect of the graphite powder in different aluminum alloy solution dumping stages, thereby improving the hardness and other properties in the subsequent aluminum alloy development process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure from the first perspective of the manufacturing equipment of the high-precision corrosion-resistant medical aluminum alloy profile of the present invention;

[0030] Figure 2 It is a schematic diagram of the three-dimensional structure from a second perspective of the manufacturing equipment of the high-precision corrosion-resistant medical aluminum alloy profile of the present invention;

[0031] Figure 3 It is a schematic diagram of a partial three-dimensional structure of the equipment for developing high-precision corrosion-resistant medical aluminum alloy profiles of the present invention;

[0032] Figure 4 It is a schematic diagram of a partial three-dimensional structure of the equipment for developing high-precision corrosion-resistant medical aluminum alloy profiles of the present invention;

[0033] Figure 5 It is a schematic diagram of the upward three-dimensional structure of the suspension seat of the manufacturing equipment of the high-precision corrosion-resistant medical aluminum alloy profile of the present invention;

[0034] Figure 6 It is a top view of the three-dimensional structure of the suspension seat of the manufacturing equipment of the high-precision corrosion-resistant medical aluminum alloy profile of the present invention;

[0035] Figure 7 A schematic diagram of the three-dimensional structure of a suspension seat of the manufacturing equipment for the high-precision corrosion-resistant medical aluminum alloy profile of the present invention;

[0036] Figure 8 It is a schematic diagram of the three-dimensional structure of the suspension seat part of the manufacturing equipment of the high-precision corrosion-resistant medical aluminum alloy profile of the present invention;

[0037] Fig. 9 It is a schematic diagram of the three-dimensional structure of a graphite cylinder cut out of the manufacturing equipment of the high-precision corrosion-resistant medical aluminum alloy profile of the present invention;

[0038] Fig.10 This is a schematic diagram of the top view of the graphite cylinder of the equipment for developing high-precision corrosion-resistant medical aluminum alloy profiles of the present invention.

[0039] In the figure: 1. smelting furnace; 2. refining furnace; 3. suspension seat; 4. upper suspension; 5. lower suspension; 6. vertical guide rod; 7. reinforcing rib; 8. winch; 9. winding roller; 10. cable guide wheel; 11. lifting ring; 12. pull rope; 13. reset plate; 14. torsion spring; 15. traction rope; 16. graphite cylinder; 17. blanking cone; 18. blanking plate; 19. guide plate; 20. blanking rod; 21. blanking piston; 22. blanking spring; 23. inclined guide wheel; 24. blanking rope; 25. center rod. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, this application proposes a method for developing high-precision corrosion-resistant medical aluminum alloy profiles.

[0042] In a typical implementation of the present application, Figure 1-10 As shown, a method for preparing a high-precision corrosion-resistant medical aluminum alloy profile comprises the following steps:

[0043] S1, melting: pure aluminum, pure magnesium, and aluminum-silicon alloy are added into a smelting furnace 1, heated to above 775°C to completely melt the alloy, and then electrolytic copper, aluminum-zinc alloy, iron-aluminum alloy, and aluminum-manganese alloy are added, and the temperature is continued to rise to above 825°C, and aluminum alloy melt is obtained after all the alloy elements are melted;

[0044] S2, refining: pour the aluminum alloy melt obtained by S1 into the refining furnace 2, and adjust the temperature to 800°C, and add graphite powder for refining treatment. After the refining is completed, let it stand for 8 minutes, remove the surface slag of the aluminum alloy melt, and then heat it to 820°C, add a refiner, magnesium strontium alloy, yttrium magnesium alloy and aluminum erbium alloy, and continue to refine by passing argon gas. The gas pressure is controlled at 0.35MPa, and the degassing time is 15min. After the degassing is completed, the composition of the aluminum alloy melt is inspected, and after the inspection is qualified, the slag is removed for the second time to complete the refining process;

[0045] S3, standing: standing the refined aluminum alloy melt until the temperature of the aluminum alloy melt drops to 700°C;

[0046] S4, die casting: preheat the mold to 140° C., spray a water-based mold release agent into the mold cavity, continue to preheat the mold cavity to 240° C., and then inject the aluminum alloy melt processed in step S3 into the mold cavity for die casting;

[0047] S5, solution quenching treatment: quenching heating temperature is 530-550℃, quenching holding time is 60min, quenching transfer time is ≤25s, and parking time after quenching is 3h;

[0048] S6, aging treatment: placing the aluminum alloy die casting after the treatment in step S5 in an aging furnace, and performing three-stage internal stress removal treatment to obtain the final aluminum alloy profile;

[0049] The preparation method of the above-mentioned graphite powder is: adding graphite coarse powder and alumina to concentrated HNO3 to react at room temperature for 2 hours, then heating in a water bath to above 90°C and stirring for reaction for 30 minutes, diluting with water and filtering, washing the filter cake and drying to obtain graphite powder; in the refining process, the role of adding graphite powder is to use it as a recarburizer to reduce the application of cast iron raw materials and reduce the cost of steel smelting. The graphite powder recarburizer has the characteristics of high fixed carbon content, heat resistance, stable lubrication and other properties, easy absorption, etc. It is added to the surface of molten iron at a certain ratio, and through mechanical vortex mixing or manual mixing, it absorbs appropriate carbon in the graphite powder recarburizer, reduces sulfur and other residual components in steel, improves the quality of steel, reduces the production cost of castings, and improves economy;

[0050] In the process of developing aluminum alloy profiles using the above steps, a development equipment for high-precision corrosion-resistant medical aluminum alloy profiles is also used, including a smelting furnace 1 and a refining furnace 2 arranged up and down. A winch 8 is also provided above the smelting furnace 1, as well as a pull rope 12, a traction rope 15 and a blanking rope 24 wound on the output end of the winch 8. The other end of the pull rope 12 is connected to the bottom end of the smelting furnace 1, and the other end of the traction rope 15 is connected to the top of the refining furnace 2. When the smelting furnace 1 is turned over for unloading, the refining furnace 2 rises synchronously. A graphite cylinder 16 is also provided above the smelting furnace 1 for evenly dropping graphite powder into the refining furnace 2 along with the turning of the smelting furnace 1. The bottom end of the graphite cylinder 16 is connected to a blanking cone 17 adapted to the unloading speed of the smelting furnace 1. A blanking piston 21 for controlling the graphite powder discharge rate is provided in the blanking cone 17. The other end of the blanking rope 24 is connected to the blanking piston 21. After the smelting of pure aluminum and other raw materials by the smelting furnace 1 is completed, the operation of the winch 8 is controlled. The output end is made to drive the pull rope 12, the traction rope 15 and the blanking rope 24 to operate synchronously. On the one hand, the smelting furnace 1 is turned over by winding the pull rope 12. At the same time, the refining furnace 2 is pulled up synchronously by the traction rope 15. When the smelting furnace 1 is turned over to the corresponding unloading angle, the aluminum alloy solution therein is poured into the refining furnace 2 below. The faster the unloading speed of the aluminum alloy solution is, the more aluminum alloy solution content therein is in the refining furnace 2. At the same time, the gradually rising refining furnace 2 can also effectively prevent the solution from splashing out in the refining furnace 2, which can avoid waste of raw materials and improve safety during operation. In addition, the synchronously wound blanking rope 24 can also pull the blanking piston 21 along with the turning process of the smelting furnace 1, so that the graphite powder in the graphite cylinder 16 is synchronously stirred with the aluminum alloy solution and falls into the refining furnace 2 below, thereby realizing uniform dispersion of the graphite powder. There is no need to set up an independent carbon rod stirring mechanism, thereby improving the hardness and other properties of the aluminum alloy in the subsequent refining process.

[0051] As a preferred implementation in this embodiment, refer to the attached Figure 1-8A suspension seat 3 is provided at the top of the smelting furnace 1, and the suspension seat 3 is suspended on the gantry. A winch 8 is installed at the top of the suspension seat 3, and the suspension seat 3 can slide on the gantry. Upper suspensions 4 are installed on both sides of the suspension seat 3. A first rotating shaft is connected to the outer wall of the smelting furnace 1. The first rotating shaft is rotatably sleeved on the bottom end of the upper suspension 4 on the corresponding side. One end of the first rotating shaft passes through the upper suspension 4 on the corresponding side and is connected to a reset disk 13. A torsion spring 14 is also connected between the reset disk 13 and the upper suspension 4 on the corresponding side. The torsion spring 14 is sleeved on the corresponding first rotating shaft. The upper suspension 4 is also connected to a reinforcing rib 7. The end sliding sleeve of the suspension 4 is provided with a vertical guide rod 6, the outer wall of the refining furnace 2 is connected to a second rotating shaft, the second rotating shaft rotating sleeve is arranged in the lower suspension 5 on the same side, the bottom end of the vertical guide rod 6 is connected to the top of the lower suspension 5 on the same side, the output end of the winch 8 is connected to a winding roller 9, and the winding roller 9 is provided with a plurality of different winding grooves, and one end of the pull rope 12, the traction rope 15 and the blanking rope 24 are respectively connected to the corresponding winding grooves, and a plurality of groups of cable guide wheels 10 are installed at the bottom end of the suspension seat 3, and a lifting ring 11 is also connected to the bottom end of the outer wall of the smelting furnace 1, and one end of the pull rope 12 is connected to the lifting ring after passing through the corresponding cable guide wheel 10. On the ring 11, the bottom ends of the two traction ropes 15 are arranged in parallel, and are connected to the top of the corresponding side vertical guide rod 6 after passing through the corresponding cable guide wheel 10 respectively. After the smelting furnace 1 is used to smelt pure aluminum and other raw materials, the output end of the winch 8 is controlled to drive the winding roller 9 to rotate, thereby winding the pull rope 12, the traction rope 15 and the blanking rope 24. On the one hand, the winding pull rope 12 drives the smelting furnace 1 to turn over with the axis of the corresponding first rotating shaft as the axis, and the aluminum alloy solution in the smelting furnace 1 is unloaded into the refining furnace 2 below. At the same time, the refining furnace 2 is synchronously pulled in the vertical direction by the winding traction rope 15. The smelting furnace 1 rises under the guidance of the guide rod 6. When the smelting furnace 1 is flipped to the corresponding angle and starts to pour the aluminum alloy solution therein, the aluminum alloy solution is poured into the refining furnace 2 below. The faster the unloading speed of the aluminum alloy solution is, the more aluminum alloy solution content therein is. At the same time, the gradually rising refining furnace 2 can also effectively prevent the solution from splashing in the refining furnace 2, which can not only avoid waste of raw materials, but also improve safety during operation. It is worth noting that the present application adopts a method of parallel vertical lifting of the refining furnace 2, which can avoid interference with the high temperature damage of the aluminum alloy solution to the traction rope 15 when the smelting furnace 1 is unloading.

[0052] As a preferred implementation in this embodiment, refer to the attached Figure 1 , 2, 5, 6, 9, 10, the graphite cylinder 16 is installed on the suspension seat 3, the bottom end of the blanking cone 17 extends to the bottom of the suspension seat 3 and corresponds to the position when the smelting furnace 1 is tilted to discharge the material, the bottom end of the blanking cone 17 is also connected to a blanking plate 18 for dispersing graphite powder, and a plurality of evenly distributed discharge holes are opened on the blanking plate 18. A guide plate 19 is fixedly sleeved on the inner wall of the graphite cylinder 16, and a blanking rod 20 is slidably sleeved on the guide plate 19. A blanking piston 21 is connected to the blanking plate 18. The bottom end of the material rod 20 is matched with the inner wall of the bottom end of the blanking cone 17. The blanking rod 20 is also sleeved with a blanking spring 22. The two ends of the blanking spring 22 are respectively connected to the guide plate 19 and the blanking piston 21. The suspension seat 3 is also equipped with an inclined inclined guide wheel 23. One end of the blanking rope 24 passes through the inclined guide wheel 23 and passes through the graphite cylinder 16 and is connected to the top of the blanking rod 20. The inner wall of the top end of the graphite cylinder 16 is connected with a center rod 25. One end of the blanking rope 24 is wound around the center rod 25. The rod 25 is on the upper side and maintained in a vertical state. The above-mentioned control winch 8 is running, and the pull rope 12, the traction rope 15 and the blanking rope 24 are synchronously wound up through the winding roller 9. As the pull rope 12 drives the smelting furnace 1 to rotate continuously, the winding of the blanking rope 24 drives the blanking rod 20 to rise synchronously, thereby pulling the blanking piston 21 to gradually move upward, so that the graphite powder falls from the gap between the blanking piston 21 and the inner wall of the blanking cone 17 to the blanking plate 18, thereby being evenly dispersed in the refining furnace 2 through the discharge holes thereon, and then with the continuous blanking of the aluminum alloy solution, the graphite powder is covered and stirred, thereby improving the dispersion of the graphite powder. In addition, due to the conical setting of the blanking cone 17, when the blanking piston 21 continues to move upward, the faster the graphite powder is discharged, the faster it is matched with the pouring speed of the smelting furnace 1, thereby optimizing the homogeneous dispersion effect of the graphite powder under different pouring stages of the aluminum alloy solution, thereby improving the hardness and other properties in the subsequent aluminum alloy research and development process.

[0053] The working principle of the present invention is as follows: after the smelting of raw materials such as pure aluminum in the smelting furnace 1 is completed, the winch 8 is controlled to operate so that its output end drives the winding roller 9 to rotate, thereby winding the pull rope 12, the traction rope 15 and the blanking rope 24. On the one hand, the smelting furnace 1 is driven to flip with the axis of the corresponding first rotating shaft as the axis through the winding pull rope 12, and the aluminum alloy solution in the smelting furnace 1 is unloaded into the refining furnace 2 below. At the same time, the refining furnace 2 is synchronously pulled up by the winding traction rope 15 under the guidance of the vertical guide rod 6. When the smelting furnace 1 flips to the corresponding angle and starts to pour the aluminum alloy solution therein, the aluminum alloy solution is poured into the refining furnace 2 below. The faster the unloading speed of the aluminum alloy solution is, the more aluminum alloy solution content in the refining furnace 2 is. At the same time, the gradually rising refining furnace 2 can also effectively prevent the solution from splashing out in the refining furnace 2, which can avoid the waste of raw materials and improve the safety during operation.

[0054] When the above-mentioned control winch 8 is running and the pull rope 12, the traction rope 15 and the blanking rope 24 are synchronously wound through the winding roller 9, the blanking rope 24 is wound up and drives the blanking rod 20 to rise synchronously as the pull rope 12 drives the smelting furnace 1 to rotate continuously, thereby pulling the blanking piston 21 to gradually move upward, so that the graphite powder falls from the gap between the blanking piston 21 and the inner wall of the blanking cone 17 to the blanking plate 18, thereby being evenly dispersed in the refining furnace 2 through the discharge holes thereon, and then with the continuous blanking of the aluminum alloy solution, the graphite powder is covered and stirred, thereby improving the dispersion of the graphite powder. In addition, due to the conical setting of the blanking cone 17, when the blanking piston 21 continues to move upward, the faster the graphite powder is discharged, the faster it is matched with the pouring speed of the smelting furnace 1, thereby optimizing the homogeneous dispersion effect of the graphite powder in different pouring stages of the aluminum alloy solution, thereby improving the hardness and other properties in the subsequent aluminum alloy research and development process.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for producing a high-precision corrosion-resistant medical aluminum alloy profile, characterized in that: The following steps are involved: S1, melting: pure aluminum, pure magnesium, and aluminum-silicon alloy are added to a melting furnace (1), heated to above 775°C to completely melt the alloy, and then electrolytic copper, aluminum-zinc alloy, iron-aluminum alloy, and aluminum-manganese alloy are added, and the temperature is continued to rise to above 825°C. After all the alloy elements are melted, an aluminum alloy melt is obtained; S2, refining: pour the aluminum alloy melt obtained in S1 into a refining furnace (2), and adjust the temperature to 800°C. At the same time, add graphite powder for refining treatment. After refining, let it stand for 8 minutes, remove the surface slag of the aluminum alloy melt, and then heat it to 820°C, add a refiner, magnesium strontium alloy, yttrium magnesium alloy and aluminum erbium alloy, and continue refining by passing argon gas. The gas pressure is controlled at 0.35 MPa, and the degassing time is 15 minutes. After degassing, inspect the composition of the aluminum alloy melt. After the inspection is qualified, remove the slag for the second time to complete the refining process; S3, standing: standing the refined aluminum alloy melt until the temperature of the aluminum alloy melt drops to 700°C; S4, die casting: preheat the mold to 140° C., spray a water-based mold release agent into the mold cavity, continue to preheat the mold cavity to 240° C., and then inject the aluminum alloy melt processed in step S3 into the mold cavity for die casting; S5, solution quenching treatment: quenching heating temperature is 530-550℃, quenching holding time is 60min, quenching transfer time is ≤25s, and parking time after quenching is 3h; S6, aging treatment: placing the aluminum alloy die casting after the treatment in step S5 in an aging furnace, and performing three-stage internal stress removal treatment to obtain the final aluminum alloy profile; The preparation method of the graphite powder is as follows: adding graphite coarse powder and alumina to concentrated HNO3 to react at room temperature for 2 hours, then heating in a water bath to above 90°C and stirring to react for 30 minutes, diluting with water and filtering, washing the filter cake and drying to obtain graphite powder; In the process of developing the aluminum alloy profile using the above steps, a high-precision corrosion-resistant medical aluminum alloy profile development equipment is also used, including a smelting furnace (1) and a refining furnace (2) arranged above and below, a winch (8) is also provided above the smelting furnace (1), and a pull rope (12), a traction rope (15) and a blanking rope (24) are wound around the output end of the winch (8), the other end of the pull rope (12) is connected to the bottom end of the smelting furnace (1), and the other end of the traction rope (15) is connected to the top end of the refining furnace (2). When the smelting furnace (1) is turned over for unloading, the refining furnace (2) rises synchronously. A graphite cylinder (16) is provided above the smelting furnace (1) for evenly dropping graphite powder into the refining furnace (2) as the smelting furnace (1) is turned over. The bottom end of the graphite cylinder (16) is connected to a drop cone (17) adapted to the unloading speed of the smelting furnace (1). A drop piston (21) for controlling the graphite powder unloading rate is provided in the drop cone (17). The other end of the drop rope (24) is connected to the drop piston (21). A suspension seat (3) is provided at the top of the smelting furnace (1), the suspension seat (3) is suspended on a gantry, the hoist (8) is installed at the top of the suspension seat (3), and the suspension seat (3) is able to slide on the gantry; An upper suspension (4) is installed on both sides of the suspension seat (3), and a first rotating shaft is connected to the outer wall of the smelting furnace (1). The first rotating shaft is rotatably sleeved on the bottom end of the upper suspension (4) on the corresponding side, and one end of the first rotating shaft passes through the upper suspension (4) on the corresponding side and is connected to a reset disk (13). A torsion spring (14) is also connected between the reset disk (13) and the upper suspension (4) on the corresponding side, and the torsion spring (14) is sleeved on the corresponding first rotating shaft.

2. The method for producing a high-precision corrosion-resistant medical aluminum alloy profile according to claim 1, characterized in that: The upper suspension (4) is also connected to a reinforcing rib (7), the end of the upper suspension (4) is slidably sleeved with a vertical guide rod (6), the outer wall of the refining furnace (2) is connected to a second rotating shaft, the second rotating shaft is rotatably sleeved in the lower suspension (5) on the same side, and the bottom end of the vertical guide rod (6) is connected to the top end of the lower suspension (5) on the same side; The output end of the winch (8) is connected to a winding roller (9), and a plurality of different winding grooves are provided on the winding roller (9). One end of the pull rope (12), the traction rope (15) and the blanking rope (24) are respectively connected to the corresponding winding grooves. A plurality of groups of cable guide wheels (10) are installed at the bottom end of the suspension seat (3). A lifting ring (11) is also connected to the bottom end of the outer wall of the smelting furnace (1). One end of the pull rope (12) passes around the corresponding cable guide wheel (10) and is connected to the lifting ring (11).

3. The method for producing a high-precision corrosion-resistant medical aluminum alloy profile according to claim 2, characterized in that: The bottom ends of the two traction ropes (15) are arranged in parallel, and are connected to the top ends of the vertical guide rods (6) on the corresponding sides after passing through the corresponding cable guide wheels (10).

4. The method for producing a high-precision corrosion-resistant medical aluminum alloy profile according to claim 1, characterized in that: The graphite cylinder (16) is mounted on the suspension seat (3), the bottom end of the blanking cone (17) extends to the bottom of the suspension seat (3) and corresponds to the position of the smelting furnace (1) when the material is tilted for discharging, and the bottom end of the blanking cone (17) is also connected to a blanking plate (18) for dispersing graphite powder, and a plurality of evenly distributed discharge holes are provided on the blanking plate (18).

5. The method for producing a high-precision corrosion-resistant medical aluminum alloy profile according to claim 4, characterized in that: A guide plate (19) is fixedly sleeved on the inner wall of the graphite cylinder (16), a blanking rod (20) is slidably sleeved on the guide plate (19), the blanking piston (21) is connected to the bottom end of the blanking rod (20) and is adapted to the inner wall of the bottom end of the blanking cone (17), and a blanking spring (22) is sleeved on the blanking rod (20), and the two ends of the blanking spring (22) are respectively connected to the guide plate (19) and the blanking piston (21).

6. The method for producing a high-precision corrosion-resistant medical aluminum alloy profile according to claim 5, characterized in that: An inclined guide wheel (23) is also mounted on the suspension seat (3), and one end of the blanking rope (24) passes around the inclined guide wheel (23), penetrates the graphite cylinder (16), and is then connected to the top end of the blanking rod (20).

7. The method for producing a high-precision corrosion-resistant medical aluminum alloy profile according to claim 6, characterized in that: A center rod (25) is connected to the inner wall of the top end of the graphite cylinder (16), and one end of the blanking rope (24) is wound around the center rod (25) and maintained in a vertical state.

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