Titanium alloy powder preparation device for aerospace 3D printing

Abstract

The invention belongs to the technical field of metal powder preparation, and particularly relates to an aerospace 3D printing titanium alloy powder preparation device which comprises a box body and a sealing box door arranged on the side wall of the box body, and a melting furnace is fixedly arranged on one side of the top of the box body; the melting furnace is arranged in the box body, a flow guide pipe extending into the box body is fixedly arranged at the bottom of the melting furnace, an electric gate valve is fixedly arranged on the pipe wall of the flow guide pipe, the grading filter screen is obliquely and fixedly arranged in the box body, and the diameters of meshes of the grading filter screen are sequentially increased from left to right. Automatic and accurate powder sorting is achieved through the grading filter screen, weight data are fed back in real time through the weighing sensor at the bottom of the material receiving bin, the included angle is adjusted in a self-adaptive mode based on the weighing data, and the sorting efficiency, the particle size control precision and the batch consistency of titanium alloy powder preparation are effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal powder preparation, and in particular relates to a titanium alloy powder preparation device for aerospace 3D printing. Background Art

[0002] At present, 3D printing technology has become the core process for the production of titanium alloy components due to its advantages in near-net forming and complex structure manufacturing. Titanium alloys are widely used in key components such as aircraft engine blades and fuselage frames due to their high strength, low density and excellent corrosion resistance. High-quality titanium alloy powder is the basic raw material for 3D printing, and its preparation accuracy directly affects the performance of the component. For example, announcement No. CN210387591U discloses a device for preparing titanium and titanium alloy powder for 3D printing.

[0003] At present, aerosol powder making technology is the mainstream method for large-scale production of titanium alloy powder. Its principle is to heat and melt the titanium alloy, and then discharge it through a guide tube to form a metal liquid flow. At the same time, a blow nozzle is used to spray high-pressure inert gas onto the surface of the liquid flow. The liquid flow is broken into fine droplets with the help of gas kinetic energy. The droplets solidify into powder during flight cooling. Parameters such as the spray angle of the blow nozzle directly determine the particle size and morphology of the powder (for example, changes in angle will affect the coarseness of the powder particle size). However, the blow nozzle angle of traditional devices is mostly fixed and cannot be adjusted in real time according to process requirements. At the same time, there is a lack of real-time monitoring and feedback system, and the blow nozzle angle cannot be dynamically adjusted according to the online data of powder particle size, which makes it difficult to meet the batch consistency requirements of aerospace powder.

[0004] To this end, a titanium alloy powder preparation device for aerospace 3D printing is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a titanium alloy powder preparation device for aerospace 3D printing in order to solve the above problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions: a titanium alloy powder preparation device for aerospace 3D printing, comprising a box body and a sealed box door provided on the side wall of the box body, a melting furnace fixedly provided on one side of the top of the box body, a guide pipe extending into the interior of the box body fixedly provided on the bottom of the melting furnace, and an electric gate valve fixedly provided on the wall of the guide pipe, and further comprising:

[0007] A graded filter screen is fixedly arranged inside the box body in an inclined manner, and the mesh diameters of the graded filter screen are arranged to increase in sequence from left to right;

[0008] A plurality of material receiving and weighing mechanisms are fixedly arranged on the bottom inner wall of the box body, and the plurality of material receiving and weighing mechanisms are all located below the grading filter screen and respectively correspond to different levels of mesh openings of the grading filter screen;

[0009] an atomizing mechanism fixedly disposed on the top inner wall of the box body and located directly below the guide tube, the atomizing mechanism being used to break up the molten metal flowing out of the lower end of the guide tube;

[0010] A cooling mechanism is fixedly arranged at the bottom of the atomizing mechanism, and is used to cool and solidify the crushed fine metal droplets into powder;

[0011] The PLC controller is fixedly arranged on the side wall of the box body, and the melting furnace, the material receiving and weighing mechanism, the atomizing mechanism and the cooling mechanism are all electrically connected to the PLC controller.

[0012] Preferably, the melting furnace includes a furnace body fixedly arranged on the top of the box body, a heating device is fixedly provided on the outer wall of the furnace body, a crucible is fixedly provided inside the furnace body, the upper end of the guide tube is fixedly connected to the bottom of the crucible, a feed pipe is fixedly provided on the top of the furnace body, and a sealing pipe cover is threadedly provided on the upper end of the feed pipe.

[0013] Preferably, the material receiving and weighing mechanism includes a weighing sensor fixedly arranged on the inner wall of the bottom of the box body, and a material receiving bin is fixedly provided on the top of the weighing sensor.

[0014] Preferably, a discharge pipe is fixedly provided on the side wall of the material receiving bin, one end of the discharge pipe away from the material receiving bin extends to the outside of the box body, and an electric butterfly valve is fixedly provided on the pipe wall of the discharge pipe.

[0015] Preferably, the atomization mechanism is located in the atomization hood inside the box body, and two fixing rods are symmetrically fixed on the top of the atomization hood, and the upper ends of the two fixing rods are fixedly connected to the top inner wall of the box body. A discharge port is opened at the top of the atomization hood and corresponding to the position of the guide tube, and a plurality of groups of evenly distributed fixing seats are fixed on the inner side wall of the atomization hood, and the number of the fixing seats in each group is two. A rotating shaft is rotatably provided between each group of the fixing seats, and a rotating block is fixed on the shaft wall of each rotating shaft, and an atomizing air blowing nozzle is fixed on the top inner wall of each rotating block, and a driving mechanism connected to the plurality of rotating shafts is provided on the top inner wall of the box body.

[0016] Preferably, the driving mechanism includes two electric push rods symmetrically fixed on the inner wall of the top of the box body, the movable ends of the two electric push rods are fixed with the same connecting ring, the bottom of the connecting ring and the corresponding positions of the multiple rotating shafts are fixed with connecting rods, the lower end of each connecting rod extends to the interior of the atomizing hood and is fixed with a rack, the shaft wall of each rotating shaft is fixed with a gear, and the multiple racks are respectively engaged with the multiple gears.

[0017] Preferably, the cooling mechanism includes a cooling cylinder fixedly arranged on the top of the atomizing hood, cooling air blowing heads are fixedly provided on both sides of the cooling cylinder, cooling air supply pipes are fixedly provided at the tail ends of the two cooling air blowing heads, and electromagnetic air valves are fixedly provided on the pipe walls of the two cooling air supply pipes.

[0018] Preferably, two inclined guide plates are fixedly provided on the inner wall of the cooling cylinder, and the two guide plates are arranged in a transverse figure eight shape.

[0019] Compared with the existing technology, the beneficial effects of the present invention are:

[0020] 1. By setting up an inclined graded filter with mesh diameters increasing from left to right, automatic multi-level sorting can be achieved according to the difference in powder particle size, so that titanium alloy powders of different particle sizes fall accurately into the corresponding areas, ensuring that powders with similar particle sizes are screened together, effectively improving the efficiency and accuracy of powder sorting.

[0021] 2. By setting a weighing sensor at the bottom of the receiving hopper to form a receiving weighing mechanism, the weight changes of the receiving hopper and the powder inside it can be accurately sensed in real time, and the weight data can be fed back to the PLC controller, providing reliable data support for subsequent adjustment of the powder particle size according to the weight change. It also facilitates quantitative management and quality control of the production process.

[0022] 3. Through the rotatable atomizing air blowing nozzle in the atomizing mechanism and the corresponding driving mechanism, the angle between the atomizing air blowing nozzle and the molten metal can be adjusted in real time according to the process requirements. Combined with the principles of fluid mechanics, the degree of molten metal fragmentation can be controlled to obtain titanium alloy powder with the target particle size; at the same time, the setting of the cooling cylinder, cooling air blowing head and inclined guide plate in the cooling mechanism can fully cool and solidify the fine droplets into powder through the convection heat exchange of the inert gas and extend the residence time of the droplets, thereby ensuring the molding quality of the powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional diagram of a titanium alloy powder preparation device for aerospace 3D printing provided by the present invention;

[0024] Figure 2 This is a perspective view of a titanium alloy powder preparation device for aerospace 3D printing provided by the present invention after being cut open from the first perspective;

[0025] Figure 3 This is a perspective view of a titanium alloy powder preparation device for aerospace 3D printing provided by the present invention after being cut open from a second perspective;

[0026] Figure 4 This is a three-dimensional diagram of the connection between the atomizing mechanism and the cooling mechanism of the titanium alloy powder preparation device for aerospace 3D printing provided by the present invention and the box;

[0027] Figure 5 This is a three-dimensional diagram of the atomization mechanism and cooling mechanism of a titanium alloy powder preparation device for aerospace 3D printing provided by the present invention after being cut apart.

[0028] In the figure: 1 box body, 2 sealed box door, 3 melting furnace, 31 furnace body, 32 heating device, 33 crucible, 34 feed pipe, 35 sealed pipe cover, 4 guide pipe, 5 electric gate valve, 6 graded filter, 7 material receiving weighing mechanism, 71 weighing sensor, 72 material receiving bin, 73 discharge pipe, 74 electric butterfly valve, 8 atomizing mechanism, 81 atomizing hood, 82 fixed rod, 83 discharge port, 84 fixed seat, 85 rotating shaft, 86 rotating block, 87 atomizing air blowing nozzle, 88 driving mechanism, 881 electric push rod, 882 connecting ring, 883 connecting rod, 884 rack, 885 gear, 9 cooling mechanism, 91 cooling cylinder, 92 cooling air blowing head, 93 cooling air supply pipe, 94 electromagnetic air valve, 95 guide plate, 10 PLC controller. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] like Figure 1-Figure 5 As shown, a titanium alloy powder preparation device for aerospace 3D printing includes a box body 1 and a sealed box door 2 arranged on the side wall of the box body 1. A melting furnace 3 is fixedly provided on one side of the top of the box body 1. A guide pipe 4 extending to the inside of the box body 1 is fixedly provided at the bottom of the melting furnace 3, and an electric gate valve 5 is fixedly provided on the wall of the guide pipe 4. The melting furnace 3 includes a furnace body 31 fixedly provided on the top of the box body 1, a heating device 32 is fixedly provided on the outer wall of the furnace body 31, a crucible 33 is fixedly provided inside the furnace body 31, and the upper wall of the guide pipe 4 is fixedly provided with a heating device 32. The end is fixedly connected to the bottom of the crucible 33, a feeding pipe 34 is fixedly provided on the top of the furnace body 31, and a sealing pipe cover 35 is threadedly provided on the upper end of the feeding pipe 34. The sealing pipe cover 35 is manually unscrewed and the titanium alloy material is put into the crucible 33. Subsequently, the staff manually tightens the sealing pipe cover 35 on the upper end of the feeding pipe 34 to ensure that the device is well sealed. The heating device 32 is turned on to make the crucible 33 itself heat up quickly, thereby efficiently transferring heat to the titanium alloy material, so that the titanium alloy material is completely melted into molten metal.

[0031] The grading filter screen 6 is fixedly arranged inside the box body 1 in an inclined manner, and the mesh diameters of the grading filter screen 6 are arranged to increase in sequence from left to right.

[0032] Multiple material receiving and weighing mechanisms 7 are all fixedly arranged on the bottom inner wall of the box body 1. Multiple material receiving and weighing mechanisms 7 are all located below the grading filter screen 6 and correspond to different levels of mesh of the grading filter screen 6 respectively. The material receiving and weighing mechanisms 7 include a weighing sensor 71 fixedly arranged on the bottom inner wall of the box body 1. A material receiving bin 72 is fixedly provided on the top of the weighing sensor 71. A discharge pipe 73 is fixedly provided on the side wall of the material receiving bin 72. The discharge pipe 73 extends to the outside of the box body 1 away from one end of the material receiving bin 72, and an electric butterfly valve 74 is fixedly provided on the pipe wall of the discharge pipe 73. The discharge pipe 73 can be connected to an external vacuum suction machine. The weighing sensor 71 can sense the weight changes of the material receiving bin 72 and the powder inside it in real time, and open the electric butterfly valve 74 to allow the titanium alloy powder in the material receiving bin 72 to be drawn out through the discharge pipe 73.

[0033] The atomizing mechanism 8 is fixedly provided on the top inner wall of the box body 1, and the atomizing mechanism 8 is located just below the guide tube 4. The atomizing mechanism 8 is used to crush the molten metal flowing out of the lower end of the guide tube 4. The atomizing mechanism 8 is located in the atomizing cover 81 inside the box body 1. Two fixing rods 82 are symmetrically fixed on the top of the atomizing cover 81. The upper ends of the two fixing rods 82 are fixedly connected to the top inner wall of the box body 1. A discharge port 83 is provided on the top of the atomizing cover 81 and corresponding to the position of the guide tube 4. A plurality of groups of evenly distributed fixing seats 84 are fixed on the inner side wall of the atomizing cover 81. The number of each group of fixing seats 84 is two. A rotating shaft 85 is provided for rotation between each group of fixing seats 84. A rotating block 86 is fixed to the axial wall of each rotating shaft 85. An atomizing air nozzle 87 is fixed on the top of each rotating block 86. The air inlet end of the atomizing air nozzle 87 is connected to an external inert gas atomizing tank through a hose, and an air compressor is installed in the middle of the hose. To provide high-pressure gas for the atomizing air blowing nozzle 87, an air compressor extracts inert gas from the atomizing air storage tank and discharges the high-pressure gas into multiple atomizing air blowing nozzles 87 through a hose, so that the molten metal is quickly broken into countless tiny droplets; the top inner wall of the box body 1 is provided with a driving mechanism 88 connected to multiple rotating shafts 85, and the driving mechanism 88 includes two electric push rods 881 symmetrically fixed on the top inner wall of the box body 1, and the moving ends of the two electric push rods 881 are fixed with the same connecting ring 882, and the bottom of the connecting ring 882 and the corresponding positions of the multiple rotating shafts 85 are fixed with connecting rods 883, and the lower end of each connecting rod 883 extends to the interior of the atomizing cover 81 and is fixed with a rack 884, and the shaft wall of each rotating shaft 85 is fixed with a gear 885, and the multiple racks 884 are respectively meshed with the multiple gears 885. There are four atomizing air blowing nozzles 87 in the figure, and there are four racks 884 and four gears 885.

[0034] The cooling mechanism 9 is fixedly arranged at the bottom of the atomizing mechanism 8, and the cooling mechanism 9 is used to cool and solidify the crushed fine metal droplets into powder. The cooling mechanism 9 includes a cooling cylinder 91 fixedly arranged on the top of the atomizing hood 81. Cooling air blowing heads 92 are fixedly provided on both sides of the cooling cylinder 91. The tails of the two cooling air blowing heads 92 are fixedly provided with cooling air supply pipes 93. One end of the cooling air supply pipe 93 is connected to an external inert gas cooling tank. The internal gas temperature of the cooling tank is relatively low. The pipe walls of the two cooling air supply pipes 93 are fixedly provided with electromagnetic valves 94. The inner wall of the cooling cylinder 91 is fixedly provided with two inclined guide plates 95. The two guide plates 95 are distributed in a horizontal figure eight shape. When the electromagnetic valve 94 is opened, the cooling tank releases the inert cooling gas, which is transported to the cooling air blowing head 92 through the cooling air supply pipe 93. The cooling air blowing head 92 evenly sprays the inert cooling gas and blows it onto the surface of the fine droplets.

[0035] The PLC controller 10 is fixedly mounted on the side wall of the box body 1 . The melting furnace 3 , the material receiving and weighing mechanism 7 , the atomizing mechanism 8 and the cooling mechanism 9 are all electrically connected to the PLC controller 10 .

[0036] The operating principle of the present invention is described as follows: the staff first manually unscrews the sealing tube cover 35, and accurately feeds titanium alloy materials that meet aerospace-grade standards, such as commonly used Ti-6Al-4V, Ti-5Al-5Mo-5V-3Cr and other alloy raw materials, into the crucible 33 through the feeding tube 34. These titanium alloy materials are ideal raw materials for key components such as aircraft engine blades and fuselage frames due to their high strength, low density and excellent corrosion resistance. Subsequently, the staff manually tightens the sealing tube cover 35 on the upper end of the feeding tube 34 to ensure that the device is well sealed and prevents impurities from entering and oxidizing the material. Then, the PLC controller 10 is operated to start the heating device 32. The device is based on the principle of electromagnetic induction and generates eddy currents in the crucible 33 through an alternating magnetic field, causing the crucible 33 itself to heat up rapidly, thereby efficiently transferring heat to the titanium alloy material, gradually heating the titanium alloy material to above the melting point until it is completely melted into liquid metal;

[0037] After the titanium alloy material inside the crucible 33 is completely melted into molten metal, the staff operates the PLC controller 10 again to start the electric gate valve 5, the electromagnetic air valve 94, the atomizing air storage tank, the air compressor and the cooling air storage tank in sequence. After the electric gate valve 5 is opened, a channel is opened for the molten metal, so that the molten metal in the crucible 33 flows smoothly into the interior of the box 1 through the guide pipe 4 under the action of gravity, and smoothly enters the atomizing hood 81 through the discharge port 83. At the same time, the air compressor extracts inert gas from the atomizing air storage tank and discharges the high-pressure gas into the multiple atomizing air blowing nozzles 87 through the hose. The high-speed airflow ejected from these atomizing air blowing nozzles 87 impacts the molten metal flow with great kinetic energy. According to the principles of fluid mechanics, the molten metal is rapidly broken into countless tiny droplets under the strong shearing and tearing action of the high-speed airflow.

[0038] The crushed tiny titanium alloy droplets fall vertically into the interior of the cooling cylinder 91 under the action of gravity. At this time, when the solenoid valve 94 is opened, the cooling gas storage tank releases inert cooling gas, which is transported to the cooling air blowing head 92 through the cooling air supply pipe 93. The cooling air blowing head 92 adopts a specially designed porous structure to evenly spray the inert cooling gas and blow it onto the surface of the tiny droplets. This cooling process is based on the principle of convective heat transfer: the low-temperature inert gas fully contacts the high-temperature droplets, quickly removing the heat from the droplet surface, causing the droplet surface temperature to drop rapidly. At the same time, the heat inside the droplets is continuously transferred to the surface. Under this continuous heat exchange, the tiny droplets gradually solidify from the surface, eventually forming solid titanium alloy powder.

[0039] When tiny droplets fall into the cooling cylinder 91, they will sequentially impact the surfaces of the two inclined guide plates 95 inside. The guide plates 95 are designed with an inclined angle. This inclined guide surface not only changes the droplet's falling trajectory, but also forces the droplets to roll and slide on the guide plates 95, thereby significantly increasing the droplet's residence time in the cooling cylinder 91. During this extended time, the droplets can fully contact the continuously blowing cooling inert gas, undergo more complete heat exchange, and ensure that they are thoroughly cooled and solidified from the outside in.

[0040] The titanium alloy powder that has completed cooling and solidification falls on the surface of the inclined grading filter 6 under the action of gravity. Since the mesh diameters of the grading filter 6 are arranged in a step-by-step manner from left to right, an automatic sorting gradient is formed. The fine-particle titanium alloy powder first passes through the mesh with smaller apertures on the left, while the larger-particle titanium alloy powder continues to roll along the surface of the inclined grading filter 6 until it encounters a mesh that matches it and then falls (in order to ensure that titanium alloy powder of corresponding particle size can accurately pass through the mesh of corresponding diameter, the area of ​​the mesh diameter of each grade of the grading filter 6 is large enough, and the grading filter 6 is provided with a vibration component, which can enable the titanium alloy powder to completely pass through the mesh of corresponding diameter. For example, when the fine-particle titanium alloy powder passes through the surface of the grading filter 6, the mesh area of ​​the smaller aperture is large enough to ensure that the fine particles The titanium alloy powder can be fully filtered, and at the same time, the vibration component is used to improve the filtering effect, effectively preventing fine particles of titanium alloy powder from entering other areas for filtering). In this way, titanium alloy powders of different particle sizes are automatically sorted in multiple stages during this process, ensuring that powders of similar particle sizes are screened together. Below the grading filter 6, multiple receiving bins 72 are neatly arranged, which can accurately receive titanium alloy powders of different particle size ranges. In order to achieve accurate measurement of the collected powder, a high-precision weighing sensor 71 is installed at the bottom of each receiving bin 72, which can sense the weight changes of the receiving bin 72 and the powder inside it in real time. The weighing sensor 71 then sends the detected weight value in the form of an electrical signal to the PLC controller 10, providing reliable data support for subsequent production management and quality control.

[0041] Before preparation, multiple receiving bins 72 are numbered 1, 2, 3 and 4 from left to right. Among them, the powder particle size in the No. 1 receiving bin 72 is the smallest, and the corresponding angle between the atomizing air blowing nozzle 87 and the molten metal flow is the largest. The powder particle size in the No. 4 receiving bin 72 is the largest, and the corresponding angle is the smallest. This rule is derived from the principle of fluid mechanics: when the angle between the atomizing air blowing nozzle 87 and the guide tube 4 (molten metal flow) increases (such as Figure 5 ), the impact range of high-speed airflow on the molten metal is wider, the shear force distribution is more uniform, the droplets are more fully broken, and the powder particle size is smaller. On the contrary, when the angle is reduced, the airflow impact is concentrated on a local part of the liquid flow, the breaking kinetic energy is weakened, and the powder particle size increases accordingly;

[0042] The staff can adjust the powder particle size in real time according to the weight change of the receiving bin 72. For example, when it is necessary to switch from the particle size corresponding to the No. 2 receiving bin 72 to the No. 3 receiving bin 72, it is necessary to adjust the angle between the atomizing air blowing nozzle 87 and the molten metal. At this time, the PLC controller 10 is operated to start the two electric push rods 881 (the electric push rods 881 have built-in servo motors and encoders. Through the synchronous control program of the PLC controller 10, the displacement feedback signals of the two electric push rods 881 are compared in real time. When the system detects that the displacement deviation of a push rod exceeds the threshold, the motor speed is immediately adjusted to ensure the correct position. (1) To ensure that the two electric push rods 881 extend and retract at the same speed, the moving ends of the two electric push rods 881 synchronously pull the connecting ring 882 upward, which drives the multiple connecting rods 883 to move upward, thereby pulling the rack 884 upward. The gear 885 meshing with the rack 884 rotates clockwise, and the rotating block 86 and the top atomizing air nozzle 87 are driven to rotate synchronously through the rotating shaft 85 to achieve the angle reduction operation. After the angle is reduced, the crushing strength of the airflow on the molten metal is reduced, and the particle size of the generated powder is correspondingly increased to meet the collection requirements of the No. 3 receiving bin 72;

[0043] During the preparation of powder from the No. 3 receiving bin 72, if the amount of powder collected from the No. 2 receiving bin 72 or the No. 4 receiving bin 72 increases abnormally, it indicates that there is a deviation in the adjustment of the angle of the atomizing air blowing nozzle 87. At this time, the PLC controller 10 starts the adaptive adjustment mechanism based on the real-time data feedback of the weighing sensor 71 of the corresponding receiving bin 72: when the amount of the No. 2 receiving bin 72 increases, it is determined that the angle is too large, and an instruction is automatically issued to extend the electric push rod 881 to increase the angle; if the amount of the No. 4 receiving bin 72 increases, it is determined that the angle is too small, and the electric push rod 881 is controlled to retract to reduce the angle. Through this closed-loop control, it is ensured that the angle of the atomizing air blowing nozzle 87 is accurately matched with the target particle size, effectively improving the preparation accuracy and batch consistency of the titanium alloy powder;

[0044] After the titanium alloy powder is prepared, sorted and stored in the corresponding receiving bin 72, the staff connects the external vacuum suction machine to the discharge pipe 73, and then operates the PLC controller 10 to send an opening signal to the corresponding electric butterfly valve 74. After receiving the command, the electric butterfly valve 74 drives the butterfly plate to rotate 90 degrees along the axis. The originally closed valve port is instantly unblocked, and the titanium alloy powder in the receiving bin 72 is drawn out through the discharge pipe 73.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A titanium alloy powder preparation device for aerospace 3D printing, comprising a box body (1) and a sealed box door (2) arranged on the side wall of the box body (1), a melting furnace (3) is fixedly provided on one side of the top of the box body (1), a guide pipe (4) extending into the interior of the box body (1) is fixedly provided on the bottom of the melting furnace (3), and an electric gate valve (5) is fixedly provided on the wall of the guide pipe (4), characterized in that: Also includes: A grading filter (6) is fixedly arranged inside the box (1) in an inclined manner, and the mesh diameters of the grading filter (6) are arranged to increase in sequence from left to right; A plurality of material receiving and weighing mechanisms (7) are fixedly arranged on the bottom inner wall of the box body (1), and the plurality of material receiving and weighing mechanisms (7) are all located below the grading filter screen (6) and respectively correspond to different levels of mesh openings of the grading filter screen (6); an atomizing mechanism (8) fixedly arranged on the top inner wall of the box body (1), and the atomizing mechanism (8) is located directly below the guide tube (4), and the atomizing mechanism (8) is used to crush the molten metal flowing out of the lower end of the guide tube (4); A cooling mechanism (9) is fixedly arranged at the bottom of the atomizing mechanism (8), and the cooling mechanism (9) is used to cool and solidify the crushed fine metal droplets into powder; The PLC controller (10) is fixedly mounted on the side wall of the box (1), and the melting furnace (3), the material receiving and weighing mechanism (7), the atomizing mechanism (8) and the cooling mechanism (9) are all electrically connected to the PLC controller (10).

2. The titanium alloy powder preparation device for aerospace 3D printing according to claim 1, characterized in that: The melting furnace (3) includes a furnace body (31) fixedly arranged on the top of the box body (1), a heating device (32) is fixedly provided on the outer wall of the furnace body (31), a crucible (33) is fixedly provided inside the furnace body (31), the upper end of the guide tube (4) is fixedly connected to the bottom of the crucible (33), a feed pipe (34) is fixedly provided on the top of the furnace body (31), and a sealing pipe cover (35) is threadedly provided on the upper end of the feed pipe (34).

3. The titanium alloy powder preparation device for aerospace 3D printing according to claim 1, characterized in that: The material receiving and weighing mechanism (7) comprises a weighing sensor (71) fixedly arranged on the inner wall of the bottom of the box body (1), and a material receiving bin (72) is fixedly arranged on the top of the weighing sensor (71).

4. The titanium alloy powder preparation device for aerospace 3D printing according to claim 3, characterized in that: A discharge pipe (73) is fixedly provided on the side wall of the material receiving bin (72), one end of the discharge pipe (73) away from the material receiving bin (72) extends to the outside of the box body (1), and an electric butterfly valve (74) is fixedly provided on the wall of the discharge pipe (73).

5. The titanium alloy powder preparation device for aerospace 3D printing according to claim 1, characterized in that: The atomizing mechanism (8) is located in the atomizing hood (81) inside the box (1), and two fixing rods (82) are symmetrically fixed on the top of the atomizing hood (81), and the upper ends of the two fixing rods (82) are fixedly connected to the top inner wall of the box (1). A discharge port (83) is opened at the top of the atomizing hood (81) and at a position corresponding to the position of the guide tube (4). A plurality of groups of evenly distributed fixing seats (84) are fixed on the inner side wall of the atomizing hood (81), and the number of each group of the fixing seats (84) is two. A rotating shaft (85) is rotatably provided between each group of the fixing seats (84), and a rotating block (86) is fixed on the shaft wall of each rotating shaft (85). An atomizing air blowing nozzle (87) is fixed on the top of each rotating block (86). A driving mechanism (88) connected to the plurality of rotating shafts (85) is provided on the top inner wall of the box (1).

6. The titanium alloy powder preparation device for aerospace 3D printing according to claim 5, characterized in that: The driving mechanism (88) includes two electric push rods (881) symmetrically fixedly arranged on the inner wall of the top of the box (1), the movable ends of the two electric push rods (881) are fixedly provided with a same connecting ring (882), the bottom of the connecting ring (882) and the corresponding positions of the multiple rotating shafts (85) are fixedly provided with connecting rods (883), the lower end of each connecting rod (883) extends to the interior of the atomizing cover (81) and is fixedly provided with a rack (884), the shaft wall of each rotating shaft (85) is fixedly provided with a gear (885), and the multiple racks (884) are respectively meshed with the multiple gears (885).

7. The titanium alloy powder preparation device for aerospace 3D printing according to claim 5, characterized in that: The cooling mechanism (9) comprises a cooling cylinder (91) fixedly arranged on the top of the atomizing hood (81), cooling air blowing heads (92) are fixedly provided on both sides of the cooling cylinder (91), cooling air supply pipes (93) are fixedly provided at the tail ends of the two cooling air blowing heads (92), and electromagnetic air valves (94) are fixedly provided on the pipe walls of the two cooling air supply pipes (93).

8. The titanium alloy powder preparation device for aerospace 3D printing according to claim 7, characterized in that: Two inclined guide plates (95) are fixedly provided on the inner wall of the cooling cylinder (91), and the two guide plates (95) are arranged in a transverse figure eight shape.

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