EIGA powder preparation satellite powder suppression device based on flow field reconstruction
By setting up an annular gas curtain with arc-shaped tubes and Laval tubes in the EIGA powder preparation unit, combined with dynamic control components, the problem of satellite powder suppression was solved, and high-quality powder preparation and a stable melting process were achieved.
Patent Information
- Application Number
- CN202510952398.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-10
- Publication Date
- 2025-09-19
AI Technical Summary
During the EIGA powder preparation process, the formation of satellite powder caused by the argon recirculation zone affects the printing quality, which is difficult to effectively suppress with existing technologies.
An EIGA atomizing satellite powder suppression device based on flow field reconstruction is adopted. By setting an arc-shaped tube at the bottom of the atomization chamber to form an annular protective air curtain, and using the Laval tube structure to optimize the airflow, combined with components such as electric heaters, thermocouple sensors and pressure reducing valves, the stability of the air curtain and the airflow impact force are dynamically controlled to block the particle migration path and disperse the already adhered satellite powder.
It effectively reduces satellite powder formation rate, improves printing powder quality, and ensures melting process stability and production efficiency.
Smart Images
Figure CN120662822A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of EIGA powder making equipment, and in particular to an EIGA powder making satellite powder suppression device based on flow field reconstruction. Background Art
[0002] In the field of additive manufacturing, gas atomization powder production has a wide range of industrial applications. The commonly used EIGA process for gas atomization powder production involves slowly melting a metal rod into a liquid stream or droplets. Under the protection of an inert gas, the liquid stream or droplets of the metal rod are atomized into fine metal droplets by a high-pressure, high-speed airflow. Simultaneously, surface tension and the cooling effect of the inert gas condense the droplets into spherical metal powder.
[0003] During the powder production process in a typical EIGA powder preparation system, the argon (inert gas) recirculation zone causes primary particles to migrate upward along the atomization chamber walls. When the argon gas's force is insufficient to overcome the particle's gravity, the particles migrate toward the center and collide with the main particle stream, forming satellite particles (irregular, cohesive particles). During the 3D printing process, these satellite particles can create voids and defects, affecting melt pool stability and negatively impacting print quality. Summary of the Invention
[0004] In order to reduce the formation rate of satellite powder during aerosol powder making and improve the quality of printed powder, the present application provides an EIGA powder making satellite powder suppression device based on flow field reconstruction.
[0005] The present application provides an EIGA powder production satellite powder suppression device based on flow field reconstruction, which adopts the following technical solutions: An EIGA powder-making satellite powder suppression device based on flow field reconstruction includes a tank body, wherein the upper part of the tank body is provided with a smelting chamber for melting metal bars into liquid flows or droplets, the lower part of the tank body is provided with an atomizing chamber for atomizing the metal bar liquid flows or droplets, and the tank body is also provided with a connecting port for connecting the smelting chamber and the atomizing chamber. The atomizing chamber is opened in a cylindrical space with a vertical axis, and a plurality of arc tubes are provided on the bottom wall of the atomizing chamber. The arc tubes are bent along the arc direction with the axis of the atomizing chamber as the center, and all the arc tubes are centered on the axis of the atomizing chamber and are spaced and symmetrically arranged in the circumferential direction; one end of the arc tube passes through and extends outside the tank body, and is connected to a protective gas source, and the protective gas source is used to transport protective gas to the arc tube. The other end of the arc tube is fixed and connected to a Laval tube.
[0006] By adopting the above technical solution, the protective gas source delivers protective gas to the arc tube, and the symmetrically arranged arc tubes spray out protective gas, forming an annular protective gas curtain on the wall of the atomization chamber. On the one hand, the path of particles rising along the chamber wall is blocked, thereby reducing the generation of satellite powder; on the other hand, since the advantage of the Laval structure is that the gas flow rate increases while the pressure decreases, the pressure in the atomization chamber will not be too high to affect the atomization flow field. The Laval tube accelerates the protective gas through the contraction-expansion structure, reducing the gas pressure while enhancing the impact of the airflow, which helps to break up the adhered satellite powder.
[0007] Preferably, two arc-shaped tubes are provided at the bottom of the atomization chamber, and the curvature of the arc-shaped tubes is 90 degrees.
[0008] By adopting the above technical solution, the double arc tubes are arranged symmetrically and spaced 180 degrees apart, forming a circular air curtain covering without dead angles, further blocking the rising path of particles along the chamber wall.
[0009] Preferably, an electric heater, a thermocouple sensor, a pressure reducing valve, a pressure sensor, and a ball valve are sequentially arranged between the protective gas source and the arc tube, and the electric heater, thermocouple sensor, pressure reducing valve, pressure sensor, and ball valve are all electrically connected to the processor.
[0010] By employing this technical solution, an electric heater preheats the shielding gas, minimizing the risk of cold airflow disturbing the atomizer chamber's temperature field. A thermocouple sensor monitors the gas temperature in real time and provides feedback to the processor, enabling precise temperature control. A pressure reducing valve regulates the gas pressure, and a pressure sensor feeds this data back to the processor, forming a closed-loop control loop that dynamically maintains the stability of the gas curtain.
[0011] Preferably, a fixed block is fixedly provided in the smelting chamber, a guide rail is vertically provided on the fixed block, a mounting frame is slidably provided on the guide rail along the length direction, and an electric cylinder for driving the mounting frame to slide is provided on the guide rail; a clamping mechanism for clamping the metal bar is provided on the mounting frame, and a high-frequency heating coil is fixedly provided above the connecting port in the smelting chamber, and the high-frequency heating coil is used for inserting the metal bar clamped by the clamping mechanism and heating and melting the metal bar.
[0012] By employing this technical solution, an electric cylinder controls the sliding movement of the mounting frame on the guide rail, thereby driving the clamping mechanism and the metal bar held therein up and down, enabling precise adjustment of the position and speed at which the metal bar is fed into the high-frequency heating coil. The high-frequency heating coil generates a high-frequency magnetic field. When the metal bar is inserted into it, this field creates eddy currents within the metal bar, rapidly heating it and causing it to melt.
[0013] Preferably, the clamping mechanism includes a guide plate, a sliding block, a clamping claw, and a driving assembly. The guide plate is fixedly connected to the mounting frame, the axis of the guide plate is parallel to the length direction of the guide rail, and a plurality of sliding grooves are spaced and symmetrically distributed in the circumferential direction of the guide plate. The sliding grooves are opened along the radial direction of the guide plate, and the sliding block slides in the sliding groove along the opening direction of the sliding groove. The clamping claw is fixedly connected to the sliding block, and all the clamping claws can jointly clamp the end of the metal bar. The driving assembly is used to drive all the sliding blocks to approach or move away from each other.
[0014] With this technical solution, once the drive assembly is activated, it drives the sliding block to slide radially within the guide plate's slot, causing the multiple jaws to move closer or further away from each other. As the jaws approach, they clamp the end of the metal bar from multiple directions. The symmetrically distributed structure evenly applies force to the metal bar, ensuring it remains stable during the clamping process without shaking or shifting.
[0015] Preferably, the driving assembly includes a locking motor, a rotating disk, and a movable rod. The rotating disk coincides with the axis of the guide disk and is rotatably connected to the guide disk. The rotating disk has a plurality of waist-shaped holes spaced and symmetrically distributed in the circumferential direction. The waist-shaped holes correspond one-to-one to the slide grooves. One end of the waist-shaped hole is close to the center of the rotating disk, and the other end of the waist-shaped hole is close to the edge of the rotating disk. The movable rod slides in the waist-shaped hole. The movable rod is fixedly connected to the sliding block, the locking motor is fixedly connected to the mounting frame, and the driving shaft of the locking motor is coaxially fixed to the rotating disk.
[0016] By adopting this technical solution, when the locking motor drives the rotating disc to rotate about its axis, the waist-shaped hole also moves in a circular motion. Because one end of the movable rod is fixed to the sliding block and the other end slides within the waist-shaped hole, the circular motion of the waist-shaped hole is converted into linear motion of the movable rod along the guide disc's chute. When the rotating disc rotates in the forward direction, the waist-shaped hole drives the movable rod to slide toward the center of the guide disc, bringing the clamping jaws together to clamp the metal bar. When the rotating disc rotates in the reverse direction, the movable rod slides toward the edge of the guide disc, releasing the clamping jaws.
[0017] Preferably, a loading hole communicating with the outside of the tank body is provided on the side wall of the smelting chamber, the loading hole being for metal bars to pass through, a preheating coil being fixedly provided in the smelting chamber, the axis of the preheating coil coinciding with the axis of the loading hole, the preheating coil being used for inserting the metal bars passing through the loading hole and preheating the metal bars, the guide rail being rotatably connected to the fixed block, the fixed block being provided with a deflection motor for driving the guide rail to rotate, the clamping jaw being deflected along with the guide rail toward the metal bars in the preheating coil.
[0018] By adopting the above technical solution, when loading is required, an external feeding device or an operator feeds the metal bar to be replaced through the loading hole into the preheating coil. The preheating coil initially heats the metal bar, raising its temperature to a certain level so that it can be quickly melted before use, thereby improving production efficiency. When the metal bar to be replaced is needed, the deflection motor drives the guide rail to rotate, causing the clamping jaws on the mounting frame to deflect toward the metal bar in the preheating coil. Subsequently, the electric cylinder drives the mounting frame to move, bringing the clamping jaws close to the end of the metal bar. The locking motor then controls the movement of the clamping jaws to clamp the preheated metal bar. Next, the electric cylinder drives the mounting frame to reverse its movement, freeing the metal bar from the preheating coil. Finally, the deflection motor drives the guide rail to rotate back, aligning the metal bar with the high-frequency heating coil. This reduces the time it takes for the metal bar to heat up in the high-frequency heating coil after preheating, improving overall work efficiency.
[0019] Preferably, a fixed clamp block and a movable clamp block are provided in the smelting chamber, the fixed clamp block is fixedly connected to the side wall of the smelting chamber, and the movable clamp block is slidably connected to the side wall of the smelting chamber in the direction of approaching or moving away from the fixed clamp block. A support plate is fixedly provided in the smelting chamber, and the support plate is located on the side of the movable clamp block away from the fixed clamp block. A thrust spring is provided between the support plate and the movable clamp block, one end of the thrust spring is abutted against the support plate, and the other end of the thrust spring is abutted against the movable clamp block, and the thrust spring drives the movable clamp block away from the support plate, and the fixed clamp block and the movable clamp block can jointly clamp the metal bar passing through the feeding hole.
[0020] By adopting the above technical solution, when the metal bar is inserted into the preheating coil, the movable clamp approaches the fixed clamp under the action of the thrust spring, and clamps the metal bar together with the fixed clamp to prevent the metal bar from shaking or shifting in the melting chamber, thereby ensuring the stability of the metal bar during preheating and subsequent processing.
[0021] Preferably, a connecting frame is fixedly arranged in the smelting chamber, an unlocking hole is opened on the connecting frame, an unlocking block is inserted in the unlocking hole, a sleeve is arranged between the connecting frame and the support plate, one end of the sleeve passes through the support plate and is fixedly connected to the support plate, the other end of the sleeve is fixedly connected to the connecting frame, a steel wire rope is inserted into the sleeve, the steel wire rope is connected to the movable clamping block at one end close to the support plate, and the steel wire rope is connected to the unlocking block at one end close to the connecting frame, and a push rod is fixedly arranged on the side wall of the rotating disk, and the push rod can be pressed against the side wall of the unlocking block on the side away from the steel wire rope, and drive the unlocking block to slide in the unlocking hole.
[0022] By adopting the above technical solution, when the clamping jaws clamp the metal bar in the preheating coil, the rotating disk rotates with the locking motor to drive the clamping jaws to clamp the metal bar. At the same time, the push rod fixed to the side wall of the rotating disk synchronously performs circular motion. The push rod rotates with the rotating disk until it contacts the side wall of the unlocking block away from the wire rope and applies a thrust, forcing the unlocking block to slide along the unlocking hole toward the connecting frame, thereby pulling the wire rope to tighten. The wire rope transmits tension through the casing, driving the movable clamping block to overcome the elastic force of the thrust spring and move toward the support plate, so that the movable clamping block separates from the fixed clamping block and quickly releases the clamping state of the metal bar. In this way, the metal bar is smoothly transferred from being clamped by the movable clamping block and the fixed clamping block to being clamped by the clamping jaws.
[0023] Preferably, a shifting groove communicating with the outside of the tank body is provided on the side wall of the smelting chamber, a shifting rod is slidably provided in the shifting groove, and the shifting rod is fixedly connected to the movable clamping block.
[0024] By adopting the above technical solution, the operator can manually operate the lever outside the tank body to make the lever slide in the lever groove, thereby driving the movable clamp to move synchronously, so that the movable clamp is away from the fixed clamp, so as to directly open the space between the movable clamp and the fixed clamp, thereby facilitating the addition of new metal bars to the preheating coil.
[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By arranging the tank body, melting chamber, atomization chamber, connection port, arc tube, and Laval tube, an annular protective air curtain is formed to block the particle migration path, reduce the formation rate of satellite powder, and use the Laval tube to optimize the atomization flow field and improve the powder quality; 2. By setting up fixed blocks, guide rails, mounting frames, electric cylinders, high-frequency heating coils, guide plates, sliding blocks, clamping claws, slides, locking motors, rotating plates, movable rods, and waist-shaped holes, the clamping and melting position of metal bars and the control of feed speed are achieved to ensure a stable melting process; 3. By setting the feeding hole, preheating coil, deflection motor, fixed clamping block, movable clamping block, support plate, thrust spring, connecting frame, unlocking hole, unlocking block, sleeve, wire rope and support rod, the preheating before loading and the clamping and handover before use of the metal bar can be achieved, thereby improving production continuity. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 This is a structural schematic diagram of an EIGA powder-making satellite powder suppression device based on flow field reconstruction provided in Example 1 of the present application.
[0027] Figure 2 This is a structural diagram of the arc tube and the external pipe of the arc tube in Example 1 of the present application.
[0028] Figure 3 yes Figure 2 Enlarged view of part A.
[0029] Figure 4 This is a schematic cross-sectional structure diagram of an EIGA powder-making satellite powder suppression device based on flow field reconstruction provided in Example 2 of the present application.
[0030] Figure 5 yes Figure 4 Magnified view of part B.
[0031] Figure 6 yes Figure 4 Magnified view of part C.
[0032] Figure 7 It is a schematic diagram of the exploded structure of the clamping mechanism in Example 2 of the present application.
[0033] Figure 8 It is a partially cutaway enlarged view of the reaction connection frame structure in Example 2 of the present application.
[0034] Explanation of the accompanying symbols: 1. Tank body; 11. Melting chamber; 111. Fixed block; 1111. Deflection motor; 112. High-frequency heating coil; 113. Feeding hole; 114. Preheating coil; 115. Fixed clamping block; 116. Movable clamping block; 117. Support plate; 118. Thrust spring; 119. Sliding groove; 1191. Sliding rod; 12. Atomizing chamber; 121. Arc tube; 122. Laval tube; 123. Electric heater; 124. Thermocouple sensor 1. Device; 125. Pressure reducing valve; 126. Pressure sensor; 127. Ball valve; 2. Guide rail; 21. Mounting bracket; 22. Electric cylinder; 3. Clamping mechanism; 31. Guide plate; 311. Slide groove; 32. Sliding block; 33. Clamping claw; 4. Drive assembly; 41. Locking motor; 42. Rotating plate; 421. Waist-shaped hole; 422. Push rod; 43. Movable rod; 5. Connecting frame; 51. Unlocking hole; 52. Unlocking block; 53. Sleeve; 531. Wire rope. DETAILED DESCRIPTION
[0035] The following is combined with Figure 1-8 This application is described in further detail.
[0036] Example 1 The embodiment of the present application discloses an EIGA powder production satellite powder suppression device based on flow field reconstruction. Figure 1The invention comprises a tank body 1, the upper portion of which is provided with a smelting chamber 11 for melting a metal bar into a liquid stream or droplets. The lower portion of the tank body 1 is provided with an atomization chamber 12 for atomizing the liquid stream or droplets of the metal bar. The tank body 1 is also provided with a connection port for connecting the smelting chamber 11 with the atomization chamber 12. The connection port is provided with a nozzle at one end near the interior of the atomization chamber 12. The liquid stream or droplets formed by the melted metal bar are dispersed downward from the center of the top of the atomization chamber 12 through the connection port and the nozzle.
[0037] Reference Figure 2 and Figure 3 The atomizing chamber 12 is provided in a cylindrical space with a vertical axis, and an outlet for discharging protective gas and molding powder is provided in the center of the bottom of the atomizing chamber 12. A plurality of arc tubes 121 are provided on the bottom wall of the atomizing chamber 12, and the arc tubes 121 are bent along the arc direction with the axis of the atomizing chamber 12 as the center. Specifically, two arc tubes 121 are provided at the bottom of the atomizing chamber 12, and the curvature of the arc tubes 121 is 90 degrees. All the arc tubes 121 are centered on the axis of the atomizing chamber 12, spaced and symmetrically arranged in the circumferential direction. One end of the arc tube 121 passes through and extends to the outside of the tank body 1, and is connected to a protective gas source through the same pipeline, and the protective gas source is used to convey protective gas to the arc tube 121. In this embodiment, the protective gas conveyed by the protective gas source is argon. The other end of the arc tube 121 is fixed and connected to a Laval tube 122.
[0038] Reference Figure 2 and Figure 3 An electric heater 123, a thermocouple sensor 124, a pressure reducing valve 125, a pressure sensor 126, and a ball valve 127 are sequentially arranged between the shielding gas source and the arc tube 121. The electric heater 123, the thermocouple sensor 124, the pressure reducing valve 125, the pressure sensor 126, and the ball valve 127 are all electrically connected to the processor. Specifically, the processor employs a PLC controller. The heating temperature of the electric heater 123 is adjustable from 0 to 200°C and is used to heat the shielding gas supplied to the arc tube 121 under the control of the processor to control the condensation rate of the metal particles. The thermocouple sensor 124 detects the shielding gas temperature and transmits it to the processor, enabling automatic calibration and regulation of the shielding gas heat. Under the control of the processor, the pressure reducing valve 125 controls the shielding gas pressure to 0 to 1.0 MPa. The pressure sensor 126 detects the shielding gas pressure and transmits it to the processor.
[0039] The implementation principle of the satellite powder suppression device for EIGA powder production based on flow field reconstruction in the embodiment of the present application is as follows: the protective gas source delivers argon gas to the arc tube 121, the arc tube 121 sprays argon gas, and forms an annular protective gas curtain on the wall of the atomization chamber 12. On the one hand, it blocks the path of particles rising along the chamber wall, thereby reducing the generation of satellite powder. On the other hand, since the advantage of the Laval structure is that the gas flow rate increases while the pressure decreases, the pressure in the atomization chamber 12 is not too high to affect the atomization flow field. The Laval tube 122 accelerates the protective gas through a structure that first contracts and then expands, and while reducing the gas pressure, it enhances the impact force of the airflow, which helps to break up the satellite powder that has been adhered. In this way, the formation rate of satellite powder in the aerosol powder production process is reduced, and the quality of printed powder is improved.
[0040] Example 2 The difference between Example 2 of the present application and Example 1 is that: Figure 4 A fixed block 111 is fixedly installed in the smelting chamber 11. A guide rail 2 is rotatably and vertically installed on the side wall of the fixed block 111. A deflection motor 1111 is installed on the fixed block 111 to drive the guide rail 2 to rotate. A mounting bracket 21 is slidably installed along the length of the guide rail 2. An electric cylinder 22 is installed on the guide rail 2 to drive the mounting bracket 21 to slide.
[0041] Reference Figure 4 and Figure 5 The mounting frame 21 is equipped with a clamping mechanism 3 for holding a metal bar. A high-frequency heating coil 112 is fixedly installed above the connection port within the smelting chamber 11. This coil is used to insert the metal bar held by the clamping mechanism 3 and heat and melt it. An electric cylinder 22 controls the sliding movement of the mounting frame 21 on the guide rail 2, thereby driving the clamping mechanism 3 and the metal bar held by the clamping mechanism 3 up and down, feeding the metal bar into the high-frequency heating coil 112.
[0042] In order to realize the clamping action of the clamping mechanism 3 on the metal bar, refer to Figure 5 and Figure 7 The clamping mechanism 3 includes a guide plate 31, a sliding block 32, a clamping claw 33, and a drive assembly 4. The guide plate 31 is embedded in the mounting frame 21 and fixedly connected to the mounting frame 21. The axis of the guide plate 31 is parallel to the length direction of the guide rail 2. A plurality of slide grooves 311 are spaced and symmetrically distributed in the circumferential direction of the guide plate 31. The slide grooves 311 are opened along the radial direction of the guide plate 31. The slide block 32 slides in the slide groove 311 along the opening direction of the slide groove 311, and the clamping claw 33 is fixed to the bottom of the slide block 32. All the clamping claws 33 can clamp the end of the metal bar together, and the drive assembly 4 is used to drive all the slide blocks 32 to move closer to or away from each other.
[0043] Reference Figure 7Specifically, the drive assembly 4 includes a locking motor 41, a rotating disk 42, and a movable rod 43. The rotating disk 42 coincides with the axis of the guide disk 31 and is rotatably connected to the guide disk 31. A number of waist-shaped holes 421 are spaced and symmetrically distributed in the circumferential direction of the rotating disk 42. The waist-shaped holes 421 correspond one-to-one to the slide grooves 311, one end of the waist-shaped hole 421 is close to the center of the rotating disk 42, and the other end of the waist-shaped hole 421 is close to the edge of the rotating disk 42. The movable rod 43 slides in the waist-shaped hole 421, and the movable rod 43 is fixedly connected to the top of the sliding block 32. The locking motor 41 is fixedly connected to the mounting bracket 21, and the drive shaft of the locking motor 41 is coaxially fixed to the rotating disk 42.
[0044] Reference Figure 5 and Figure 7 When a metal bar needs to be clamped, the locking motor 41 drives the rotating disk 42 to rotate about its axis, causing the waist-shaped hole 421 to follow in a circular motion. The slide groove 311 restricts the guide block and the movable rod 43 connected to it to move only along the radial direction of the guide groove. As the rotating disk 42 rotates, the waist-shaped hole 421 drives the movable rod 43 to slide toward the center of the guide disk 31, bringing the clamping jaws 33 closer together and clamping the metal bar. Similarly, when the motor drives the rotating disk 42 to rotate in the opposite direction, the movable rod 43 slides toward the edge of the guide disk 31, releasing the clamping jaws 33.
[0045] In order to preheat the metal bar to be replaced, refer to Figure 4 and Figure 6 The sidewall of the smelting chamber 11 is provided with a loading hole 113 that connects to the exterior of the tank body 1. Loading hole 113 allows metal bars to pass through. A preheating coil 114 is fixedly installed within the smelting chamber 11. The axis of the preheating coil 114 coincides with the axis of the loading hole 113. The preheating coil 114 is used to insert the metal bar passing through the loading hole 113 and preheat the metal bar. The clamping jaw 33 can be deflected along the guide rail 2 to face the metal bar in the preheating coil 114. While the high-frequency heating coil 112 is melting a metal bar, a replacement metal bar can be inserted into the preheating coil 114 to preheat the preheating coil 114, thereby reducing the heating time required for the metal bar to melt.
[0046] Reference Figure 4 and Figure 6A fixed clamping block 115 and a movable clamping block 116 are provided within the smelting chamber 11. The fixed clamping block 115 is fixedly connected to the side wall of the smelting chamber 11, while the movable clamping block 116 is slidably connected to the side wall of the smelting chamber 11 in a direction toward or away from the fixed clamping block 115. A support plate 117 is fixedly provided within the smelting chamber 111, located on the side of the movable clamping block 116 facing away from the fixed clamping block 115. A thrust spring 118 is provided between the support plate 117 and the movable clamping block 116. One end of the thrust spring 118 abuts against the support plate 117, while the other end of the thrust spring 118 abuts against the movable clamping block 116. The thrust spring 118 urges the movable clamping block 116 away from the support plate 117. The fixed clamping block 115 and the movable clamping block 116 can jointly clamp the metal bar passing through the loading hole 113, thereby improving the stability of the metal bar. In addition, in this embodiment, a telescopic guide rod is provided between the support plate 117 and the movable clamping block 116, one end of the telescopic guide rod is fixedly connected to the support plate 117, and the other end of the telescopic guide rod is fixedly connected to the movable clamping block 116 to realize the linear movement of the movable clamping block 116.
[0047] In order to realize the transition of the metal bar from being clamped by the movable clamping block 116 and the fixed clamping block 115 to being clamped by the clamping claw 33, refer to Figure 6 and Figure 8 A connecting frame 5 is fixedly installed in the smelting chamber 11. The connecting frame 5 is provided with an unlocking hole 51, and an unlocking block 52 is inserted into the unlocking hole 51. A sleeve 53 is provided between the connecting frame 5 and the smelting chamber 11. One end of the sleeve 53 passes through the support plate 117 and is fixedly connected to the support plate 117, and the other end of the sleeve 53 is fixedly connected to the connecting frame 5. A steel wire rope 531 is inserted into the sleeve 53. The end of the steel wire rope 531 near the support plate 117 is connected to the movable clamping block 116, and the end of the steel wire rope 531 near the connecting frame 5 is connected to the unlocking block 52. A stop rod 422 is fixedly installed on the side wall of the rotating disk 42. The stop rod 422 can abut against the side wall of the unlocking block 52 away from the steel wire rope 531, and drive the unlocking block 52 to slide within the unlocking hole 51. As the clamping jaws 33 clamp the metal bar within the preheating coil 114, the rotating disk 42 rotates with the locking motor 41, driving the clamping jaws 33 to clamp the metal bar. Simultaneously, the push rod 422 rotates with the rotating disk 42 until it contacts the sidewall of the unlocking block 52 away from the wire rope 531 and applies a thrust, forcing the unlocking block 52 to slide along the unlocking hole 51 toward the connecting frame 5, thereby tightening the wire rope 531. The wire rope 531 transmits tension through the sleeve 53, driving the movable clamping block 116 to overcome the elastic force of the thrust spring 118 and move toward the support plate 117, causing the movable clamping block 116 to separate from the fixed clamping block 115, quickly releasing the clamping state of the metal bar. This ensures a smooth transition from being clamped by the movable clamping block 116 and the fixed clamping block 115 to being clamped by the clamping jaws 33.
[0048] Reference Figure 6In order to facilitate opening the movable clamp 116 and the fixed clamp 115 outside the tank body 1, a shift groove 119 communicating with the outside of the tank body 1 is opened on the side wall of the smelting chamber 11. A shift rod 1191 is slidably provided in the shift groove 119, and the shift rod 1191 is fixedly connected to the movable clamp 116.
[0049] In addition, in this embodiment, the electric cylinder 22, the locking motor 41, the deflection motor 1111, the high-frequency heating coil 112, and the preheating coil 114 are all electrically connected to the processor.
[0050] The implementation principle of the EIGA powder production satellite powder suppression device based on flow field reconstruction in this embodiment of the present application is as follows: When metal powder preparation is required, an external feeder or an operator feeds the metal bar to be replaced into the preheating coil 114 through the feed hole 113. After the metal bar is inserted into the preheating coil 114, the movable clamp 116, under the action of the thrust spring 118, approaches the fixed clamp 115 and, together with the fixed clamp 115, clamps the metal bar. The preheating coil 114 initially heats the metal bar, raising its temperature to a certain level to facilitate rapid melting for subsequent use. When the preheated metal bar is needed, the deflection motor 1111 drives the guide rail 2 to rotate, causing the clamp 33 on the mounting frame 21 to deflect toward the metal bar in the preheating coil 114. Subsequently, the electric cylinder 22 drives the mounting frame 21 to move, bringing the clamp 33 closer to the end of the metal bar. Next, the locking motor 41 controls the rotation of the rotating disk 42, and the waist-shaped hole 421 drives the movable rod 43 to slide toward the center of the guide disk 31, causing the clamping jaws 33 to move closer together and clamp the metal bar. Simultaneously, as the rotating disk 42 rotates, the push rod 422 rotates with the rotating disk 42 until it contacts the side wall of the unlocking block 52 away from the wire rope 531 and applies a thrust, forcing the unlocking block 52 to slide along the unlocking hole 51 toward the connecting frame 5. This in turn pulls the wire rope 531 to tighten, driving the movable clamping block 116 to overcome the elastic force of the thrust spring 118 and move toward the support plate 117, separating the movable clamping block 116 from the fixed clamping block 115 and releasing the clamping force on the metal bar. The electric cylinder 22 then drives the mounting frame 21 in the opposite direction, freeing the metal bar from the preheating coil 114. During this process, the push rod 422 will not move with the mounting frame 21 until the metal bar is free from between the movable clamping block 116 and the fixed clamping block 115, at which point the push rod 422 will move with the mounting frame 21 to free the unlocking block 52. Next, the deflection motor 1111 rotates the guide rail 2 back, aligning the metal bar with the high-frequency heating coil 112. The electric cylinder 22 drives the mounting frame 21 downward, feeding the metal bar into the high-frequency heating coil. The high-frequency heating coil 112 generates a high-frequency magnetic field. When the metal bar is inserted into it, eddy currents are generated within it, rapidly heating it and causing it to melt. The resulting melted liquid streams or droplets are dispersed through the connection port and nozzle, and then fall from the center of the top of the atomization chamber 12.
[0051] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. An EIGA powder-making satellite powder suppression device based on flow field reconstruction, comprising a tank body (1), wherein the upper portion of the tank body (1) is provided with a smelting chamber (11) for melting a metal bar into a liquid flow or droplets, and the lower portion of the tank body (1) is provided with an atomizing chamber (12) for atomizing the metal bar liquid flow or droplets, and the tank body (1) is further provided with a connecting port for connecting the smelting chamber (11) and the atomizing chamber (12), characterized in that: The atomizing chamber (12) is opened in a cylindrical space with a vertical axis. A plurality of arc tubes (121) are provided on the bottom wall of the atomizing chamber (12). The arc tubes (121) are bent along an arc direction with the axis of the atomizing chamber (12) as the center. All the arc tubes (121) are spaced and symmetrically arranged along the circumferential direction with the axis of the atomizing chamber (12) as the center. One end of the arc tube (121) passes through and extends to the outside of the tank body (1) and is connected to a protective gas source. The protective gas source is used to transport protective gas to the arc tube (121). The other end of the arc tube (121) is fixed and connected to a Laval tube (122).
2. The EIGA powder production satellite powder suppression device based on flow field reconstruction according to claim 1 is characterized by: Two arc-shaped tubes (121) are provided at the bottom of the atomization chamber (12), and the arc angle of the arc-shaped tubes (121) is 90 degrees.
3. The satellite powder suppression device for EIGA milling based on flow field reconstruction according to claim 1 is characterized by: An electric heater (123), a thermocouple sensor (124), a pressure reducing valve (125), a pressure sensor (126), and a ball valve (127) are sequentially arranged between the protective gas source and the arc tube (121); the electric heater (123), the thermocouple sensor (124), the pressure reducing valve (125), the pressure sensor (126), and the ball valve (127) are all electrically connected to the processor.
4. The satellite powder suppression device for EIGA milling based on flow field reconstruction according to claim 1 is characterized by: A fixed block (111) is fixedly provided in the smelting chamber (11), a guide rail (2) is vertically provided on the fixed block (111), a mounting frame (21) is slidably provided on the guide rail (2) along the length direction, and an electric cylinder (22) is provided on the guide rail (2) for driving the mounting frame (21) to slide; a clamping mechanism (3) for clamping a metal bar is provided on the mounting frame (21), and a high-frequency heating coil (112) is fixedly provided in the smelting chamber (11) and is located above the connection port, and the high-frequency heating coil (112) is used for inserting the metal bar clamped by the clamping mechanism (3) and heating and melting the metal bar.
5. The satellite powder suppression device for EIGA milling based on flow field reconstruction according to claim 4 is characterized by: The clamping mechanism (3) includes a guide plate (31), a sliding block (32), a clamping claw (33), and a driving assembly (4). The guide plate (31) is fixedly connected to the mounting frame (21). The axis of the guide plate (31) is parallel to the length direction of the guide rail (2). The guide plate (31) has a plurality of sliding grooves (311) spaced and symmetrically distributed in the circumferential direction. The sliding grooves (311) are opened along the radial direction of the guide plate (31). The sliding block (32) slides in the sliding groove (311) along the opening direction of the sliding groove (311). The clamping claw (33) is fixedly connected to the sliding block (32). All the clamping claws (33) can clamp the end of the metal bar together. The driving assembly (4) is used to drive all the sliding blocks (32) to move closer to or away from each other.
6. The satellite powder suppression device for EIGA milling based on flow field reconstruction according to claim 5 is characterized by: The driving assembly (4) includes a locking motor (41), a rotating disk (42), and a movable rod (43). The rotating disk (42) coincides with the axis of the guide disk (31) and is rotatably connected to the guide disk (31). The rotating disk (42) has a plurality of waist-shaped holes (421) spaced and symmetrically distributed in the circumferential direction. The waist-shaped holes (421) correspond one-to-one to the slide grooves (311). One end of the waist-shaped hole (421) is close to the center of the rotating disk (42), and the other end of the waist-shaped hole (421) is close to the edge of the rotating disk (42). The movable rod (43) slides in the waist-shaped hole (421). The movable rod (43) is fixedly connected to the sliding block (32). The locking motor (41) is fixedly connected to the mounting frame (21). The driving shaft of the locking motor (41) is coaxially fixed to the rotating disk (42).
7. The satellite powder suppression device for EIGA milling based on flow field reconstruction according to claim 6 is characterized by: A loading hole (113) communicating with the outside of the tank body (1) is provided on the side wall of the smelting chamber (11). The loading hole (113) allows metal bars to pass through. A preheating coil (114) is fixedly provided in the smelting chamber (11). The axis of the preheating coil (114) coincides with the axis of the loading hole (113). The preheating coil (114) is used to allow the metal bars passing through the loading hole (113) to be inserted and to preheat the metal bars. The guide rail (2) is rotatably connected to the fixed block (111). A deflection motor (1111) for driving the guide rail (2) to rotate is provided on the fixed block (111). The clamping jaw (33) can deflect along with the guide rail (2) to face the metal bars in the preheating coil (114).
8. The satellite powder suppression device for EIGA milling based on flow field reconstruction according to claim 7 is characterized by: A fixed clamping block (115) and a movable clamping block (116) are provided in the smelting chamber (11); the fixed clamping block (115) is fixedly connected to the side wall of the smelting chamber (11); the movable clamping block (116) is slidably connected to the side wall of the smelting chamber (11) in a direction approaching or moving away from the fixed clamping block (115); a support plate (117) is fixedly provided in the smelting chamber (11); the support plate (117) is located on a side of the movable clamping block (116) away from the fixed clamping block (115); A thrust spring (118) is provided between the support plate (117) and the movable clamping block (116), one end of the thrust spring (118) is against the support plate (117), and the other end of the thrust spring (118) is against the movable clamping block (116). The thrust spring (118) drives the movable clamping block (116) away from the support plate (117), and the fixed clamping block (115) and the movable clamping block (116) can jointly clamp the metal bar passing through the feeding hole (113).
9. The satellite powder suppression device for EIGA milling based on flow field reconstruction according to claim 8, characterized in that: A connecting frame (5) is fixedly arranged in the smelting chamber (11), an unlocking hole (51) is provided on the connecting frame (5), an unlocking block (52) is inserted into the unlocking hole (51), a sleeve (53) is arranged between the connecting frame (5) and the supporting plate (117), one end of the sleeve (53) passes through the supporting plate (117) and is fixedly connected to the supporting plate (117), the other end of the sleeve (53) is fixedly connected to the connecting frame (5), and a steel wire rope (52) is inserted into the sleeve (53). 31), the steel wire rope (531) is connected to the movable clamping block (116) at one end close to the support plate (117), the steel wire rope (531) is connected to the unlocking block (52) at one end close to the connecting frame (5), and a push rod (422) is fixedly provided on the side wall of the rotating disk (42), and the push rod (422) can be pressed against the side wall of the unlocking block (52) away from the steel wire rope (531) and drive the unlocking block (52) to slide in the unlocking hole (51).
10. The satellite powder suppression device for EIGA milling based on flow field reconstruction according to claim 8, characterized in that: A shifting groove (119) communicating with the outside of the tank body (1) is provided on the side wall of the smelting chamber (11), a shifting rod (1191) is slidably provided in the shifting groove (119), and the shifting rod (1191) is fixedly connected to the movable clamping block (116).