Powder anti-oxidation high-pressure pulse type conveying equipment based on metal 3D printer

Abstract

The invention belongs to the technical field of metal 3D printing, and particularly relates to powder anti-oxidation high-pressure pulse type conveying equipment based on a metal 3D printer, the powder anti-oxidation high-pressure pulse type conveying equipment comprises a powder recycling bin, a feeding unit is arranged at the axis of the powder recycling bin, and a decomposition unit is arranged on one side of the feeding unit; through the mutual contact state between the electromagnets and the mutual contact state between the electrode column and the electrode cap, whether the interaction relation between the powder cutting device and impurities in the current state exceeds a set interval or not is jointly guaranteed, excessive rigid contact between the powder cutting device and the impurities is avoided, the service cycle of the powder cutting device in the actual use process is prolonged, and the service life of the powder cutting device is prolonged. The core precision of the powder cutter is maintained, the calibration frequency is reduced, meanwhile, abrasion of the powder cutter body and secondary pollution to powder are reduced, and the powder purity is guaranteed; and the relative angle between the T-section column at the current position and the ball is dynamically adjusted in real time, so that the relative shearing angle between the whole powder cutter and impurities is adjusted, and the shearing path of the powder cutter is optimized.

Description

Technical Field

[0001] This invention belongs to the field of metal 3D printing technology, specifically relating to a high-pressure pulsed powder anti-oxidation conveying device based on a metal 3D printer. Background Technology

[0002] Metal 3D printer: Based on additive manufacturing technology, it uses metal powder (such as stainless steel, titanium alloy or high temperature alloy) as the forming material, and then melts and solidifies the powder layer by layer through high energy beams such as laser or electron beam, and finally stacks them to form a three-dimensional metal part.

[0003] In addition, the powder recycling and screening equipment is an important piece of equipment in its powder conveying system. It is mainly used to accurately control the particle size of metal powder and remove impurities, thereby ensuring the quality of printing powder and printing stability.

[0004] Arch bridge effect: In powder conveying systems (used for metal 3D printing), metal powder particles interlock and form a stable arch structure, hindering the normal flow of powder. In practice, this manifests as the mixing of new and recycled powder particles in the hopper after screening. Due to changes in particle size distribution and surface energy, an arch bridge phenomenon forms at the outlet. Ultimately, during the periodic collapse and reconstruction of the arch bridge, there is a significant fluctuation in the powder supply, resulting in powder stratification or even powder supply interruption.

[0005] Meanwhile, the old powder residue and localized agglomeration impurities on the inner wall of the pipe will significantly exacerbate the bridging phenomenon. In essence, the aforementioned impurities provide stable anchoring points, change the interaction force between particles, enhance the bonding strength, disrupt the powder flow state in the pipe, induce local retention, and induce secondary agglomeration, making the aforementioned bridging phenomenon more convenient, stable, and difficult to remove. This further expands the bridging scale and forms a vicious cycle of impurity accumulation - bridging aggravation - more impurity retention, ultimately seriously damaging the stability of printing and the quality of part forming. Summary of the Invention

[0006] To solve the above problems, the present invention adopts the following technical solution: a high-pressure pulse conveying device for anti-oxidation of powder based on a metal 3D printer, including a powder recycling bin, a feeding unit is provided at the shaft center of the powder recycling bin, and a decomposition unit is provided on one side of the feeding unit;

[0007] The decomposition unit includes:

[0008] The shaft seal cylinder is installed in a plug-in snap-fit ​​configuration at the gravity end of the powder recirculation chamber.

[0009] The bearing seat is rotatably fitted onto the inner wall of the shaft seal cylinder at the middle position near the gravity end;

[0010] The electric telescopic air rod is snapped onto the end face of the bearing seat on the side away from gravity.

[0011] The end seat is snapped onto the end of the electric telescopic rod away from the shaft seat;

[0012] Angle plate, snapped onto the outer wall of the movable end of the electric telescopic pole;

[0013] The corner posts are circumferentially distributed on the outer side of the end face of the corner plate away from the bearing seat, and the corner posts are snap-fitted to the corner plate;

[0014] The annular scraper is positioned between the corner plate and the end seat, and is snap-fitted to the outer wall of the end seat.

[0015] Preferably, an outer corner ring is snapped onto the outer wall of the end of the shaft seal tube away from the shaft seat. A double-headed support is installed in a circumferentially uniform insertion manner on the outer end face of the outer corner ring. A station ring tube is provided on the side of the shaft seal tube away from the shaft seat, which is slidably snapped onto the double-headed support. The inner diameter of the station ring tube is the same as that of the shaft seal tube, and the inner diameter of the station ring tube is larger than the outer diameter of the powder conveying tube. An angle strip is snapped onto the outer wall of the station ring tube, and an angle groove that matches the angle strip is opened on the inner wall of the powder recirculation chamber. A decorative panel is installed in a circumferentially uniform snap-fit ​​manner on the inner wall of the end of the station ring tube away from the shaft seat, and the decorative panel is staggered with the double-headed support. An elastic rubber head is slidably snapped onto the station ring tube and the decorative panel.

[0016] Preferably, an outer corner cylinder is snapped onto the end of the end seat away from the shaft seat, and a coaxial inner corner cylinder is snapped onto the inside of the outer corner cylinder. The outer wall of the inner corner cylinder is uniformly provided with through grooves. A shaft platform is provided at the axis of the inner corner cylinder and is rotatably fitted with the outer corner cylinder. A corrugated plate is uniformly snapped onto the end face of the shaft platform away from the end seat in a circumferential manner. A keyway is uniformly provided on the outer wall of the outer corner cylinder. Support rods are symmetrically provided inside the keyway and snapped onto the outer corner cylinder. An angle seat is slidably snapped onto the middle position of the outer wall of the two support rods in the same group. A telescopic spring sleeved on the outer wall of the support rod is snapped onto the angle seat and the outer corner cylinder. A ball bearing is rolled onto the middle position of the angle seat.

[0017] Preferably, a T-section column is rotatably mounted through the middle of the ball bearing. A drive gear is snapped onto the outer wall of the T-section column near the axis of the outer corner cylinder. A hanger rod is circumferentially snapped onto the inner wall of the inner corner cylinder away from the end seat. A one-way rack meshing with the drive gear is snapped onto the end of the hanger rod near the end seat. A long strip ring plate, snapped onto the inner corner cylinder, is rotatably mounted on the outer wall of the T-section column near the axis of the outer corner cylinder. A spring ball head rod is symmetrically slidably snapped onto the inner corner cylinder in the through groove of the outer wall of the inner corner cylinder. A single-headed firing pin that cooperates with the wave plate is snapped onto the middle position of the outer wall of the long strip ring plate near the end seat.

[0018] Preferably, a single-head seat is snapped onto the middle position of the end face of the keyway near the end seat, a single-panel is snapped onto the end of the single-head seat away from the end seat, and upright plates are symmetrically snapped onto the end face of the single-panel away from the single-head seat. Spring columns are snapped onto the opposite faces of the upright plates. Support seats are symmetrically slidably snapped onto the middle area of ​​the end face of the single-panel away from the end seat, and the support seats are slidably snapped onto the spring columns. Electromagnets are snapped onto the middle positions of the opposite faces of the two support seats in the same group. Electrode columns are snapped onto the middle position of the end of the support seat near the single-head seat, and electrode caps that cooperate with the electrode columns are snapped onto the middle position of the end of the upright plate near the single-head seat.

[0019] Preferably, a corner cutting chamber is snapped onto the end of the T-section column away from the axis of the outer cylinder. A slitting plate is snapped onto the inside of the corner cutting chamber away from the T-section column. Corner slots are staggered in an array on the end face of the corner cutting chamber away from the outer cylinder and the end face of the slitting plate. A straight plate is symmetrically snapped onto the end face of the slitting plate away from the outer cylinder. A powder cutter extending out of the corner slot is evenly snapped onto the end face of the straight plate away from the outer cylinder in an array, and the powder cutter is slidably fitted with the corner slot. A ring blow valve head is snapped onto the outer wall of the end of the powder cutter away from the outer cylinder. An inner plate that slides and is assembled with the straight plate is symmetrically snapped onto the end face of the slitting plate away from the outer cylinder. A spring telescopic rod that is snapped onto the straight plate is evenly snapped onto the end face of the inner plate in an array.

[0020] Preferably, a through-type rotatable angle shaft is installed in the middle of the cutting plate. A cam is snapped onto the outer wall of the angle shaft at the end away from the outer cylinder. A transmission shaft that is rotatably assembled with the angle cutting chamber is provided on one side of the T-section column at the end away from the outer cylinder. A main gear is snapped onto the outer wall of the T-section column near the angle shaft. A position gear that meshes with the main gear is snapped onto the middle position of the outer wall of the transmission shaft. A graded gear is snapped onto the outer wall of the transmission shaft near the angle shaft. A terminal gear that meshes with the graded gear is snapped onto the outer wall of the angle shaft near the T-section column.

[0021] Preferably, the feeding unit includes:

[0022] The jet valve tube is installed in the middle of the outer wall of the powder recirculation pipe using a plug-in snap-fit ​​connection.

[0023] The conical feeder is snapped onto one end of the blow valve pipe near the axis of the powder recirculation chamber, and the conical feeder and the powder recirculation chamber are coaxially arranged.

[0024] The screen column is circumferentially and uniformly snapped onto the inner wall of the cone feeder at the end furthest from the shaft seal pipe.

[0025] The end plate is coaxially located on the side of the powder recirculation chamber away from the shaft seal pipe, and the end plate is snapped together with the conical feeder.

[0026] The guide platform is snap-fitted and installed at the middle position of the end face of the end platform on the side away from the shaft seal tube; in addition, the cross-sectional shape of the guide platform is an isosceles trapezoid.

[0027] The dustproof sleeve is snap-fitted onto the end face of the end platform away from the shaft seal tube.

[0028] The motor mount is snapped onto the end face of the end platform away from the shaft seal tube, and the motor mount is located inside the dustproof cylinder;

[0029] The servo motor is snapped onto the motor mount at the end furthest from the end panel.

[0030] The main electric telescopic rod is snapped onto the output end of the servo motor, and extends through the end plate into the conical feeder.

[0031] Preferably, the main electric telescopic rod is fitted with an auger at the end away from the motor base, a bridging bracket is fitted at the middle of the inner wall of one side of the powder recirculation chamber, a bridging column is fitted with the end of the bridging bracket near the axis of the powder recirculation chamber, a stepper motor is fitted with the middle of the end face of the bridging column near the motor base, a slotted frame is fitted together with the stepper motor and the bridging bracket, a conversion platform is fitted with the end of the bridging column away from the stepper motor, a powder conveying pipe is fitted with the end face of the conversion platform away from the stepper motor in a symmetrical plug-in manner, a secondary electric telescopic rod is fitted with the middle of the end face of the conversion platform away from the bridging column, and a double-headed buckle plate is fitted with the end of the secondary electric telescopic rod away from the bridging column and fitted with the outer wall of the conversion platform.

[0032] Preferably, a screening main control panel is provided outside the powder recycling bin. An electromagnetic feed valve pipe is plugged into and snapped onto the side of the screening main control panel near the powder recycling bin. A screen assembly is snapped onto the same side of the electromagnetic feed valve pipe near the powder recycling bin and connected to the screening main control panel via a flexible hose. A main control box is snapped onto the same side of the screen assembly and connected to the screening main control panel. An explosion-proof frame is provided on the other side of the screen assembly. A powder collection bin is snapped onto the middle of the explosion-proof frame and connected to the powder recycling bin. A residual powder transfer pipe is plugged into the end of the powder collection bin away from the screen assembly. An impurity collection assembly is snapped onto the same side of the screening main control panel and connected to the screen assembly via a flexible hose.

[0033] A method for cleaning the inner wall of the powder conveying pipe in a powder sieving system of a metal 3D printer is described above. The cleaning is performed using the aforementioned high-pressure pulsed powder anti-oxidation conveying equipment based on a metal 3D printer. The specific steps are as follows:

[0034] S1: First, the powder after screening is introduced into the powder conveying pipe area by the cone feeder (under the action of gravity). Then, by using the motion synchronization between the main electric telescopic rod and the servo motor, the auger is controlled to continuously convey the powder in the powder conveying pipe area in a progressive manner until the powder is conveyed to the predetermined area in an orderly manner.

[0035] During this process, the bridge is controlled by a stepper motor, which drives the converter to rotate at a predetermined angle to achieve the alternation of positions between different powder conveying pipes. The extension and retraction of the auxiliary electric telescopic rod synchronously controls the two powder conveying pipes that have achieved the position alternation to move in the opposite direction to the auger until the powder conveying pipes are completely separated from the auger.

[0036] S2: Then, under the stable support of the shaft seat, the electric telescopic air rod synchronously controls the end seat to drive the outer cylinder to move in the opposite direction to the powder conveying pipe (non-operation) in a feeding motion until the powder cutter cuts and breaks up the impurities or agglomerated impurities along the way.

[0037] During this process, the dual signals provided by the contact between the electrode post and the electrode cap and the separation of the electromagnet are used to coordinate the judgment of the environment, ensuring the relative motion state between the support base and the ball bearing in the current state, and providing high-precision real-time dynamic feedback on whether the interaction between external impurities and the powder cutter exceeds the predetermined value.

[0038] When the relative interaction between the powder cutter and the impurities exceeds a predetermined value, the synchronous drive shaft table drives the corrugated plate to rotate a predetermined angle or number of revolutions until the single-headed striker, under the squeezing action of the corrugated plate, controls the T-section column to return to its initial position. During this process, the drive gear and the one-way rack mesh to a predetermined degree, dynamically adjusting the relative angle between the angle cutting chamber and the impurities in the current state. Through the differential speed cooperation between the main gear, the dividing gear, the grading gear and the terminal gear, the relative interaction depth between the cam and the angle plate is synchronously and dynamically changed, further adjusting the distance between adjacent powder cutters and improving the shearing effect of the powder cutter.

[0039] S3: Finally, through the repeated reciprocating motion of the electric telescopic air rod, the optimal shearing angle between the powder cutter and the impurities is continuously adjusted. After the powder cutter completes the shearing process, the electric telescopic air rod is used again to control the feed depth of the annular scraper to perform a supplementary and complete scraping and cleaning process on the crushed area of ​​the powder cutter. Then, by switching the angle of the conversion table, it is ensured that the decomposition unit can perform alternating cleaning operations on the inner wall of the powder conveying pipe at different locations, thereby avoiding or reducing the occurrence of bridging.

[0040] The present invention has the following beneficial effects:

[0041] 1. This invention, through the mutual contact state between electromagnets and between electrode posts and electrode caps, jointly ensures that the interaction between the powder cutter and impurities in the current state does not exceed a predetermined range, avoids excessive rigid contact between the powder cutter and impurities, improves the service life of the powder cutter in actual use, maintains the core accuracy of the powder cutter, reduces the frequency of calibration, and at the same time reduces the wear of the powder cutter body, causing secondary pollution to the powder, and ensuring the purity of the powder.

[0042] Meanwhile, through the periodic intermittent contact between the single-headed impact pin and the corrugated plate, the relative position of the powder cutter in the poor shearing area is restored in a targeted manner. Furthermore, during the return stroke of the drive gear, a predetermined degree of unidirectional meshing with the rack at the corresponding position is achieved, which dynamically adjusts the relative angle between the T-segment column and the ball bearings at the current position in real time. This adjusts the relative shearing angle between the powder cutter as a whole and the impurities, optimizes the shearing path of the powder cutter, avoids excessive rigid contact collisions, and improves the shearing effect.

[0043] 2. This invention utilizes the differential transmission meshing between the main gear, the intermediate gear, the grading gear, and the terminal gear. As the T-section column changes the relative angle between the cutting chamber and the impurities, the angular shaft drives the cam to continuously change the relative interaction depth between the angular position plate and the cutting chamber. This achieves dynamic linear adjustment of the vertical spacing between adjacent powder cutters, further altering the relative interaction position and state between the powder cutter and the impurities.

[0044] This means that segmented progressive shearing is achieved along the axial direction of the powder conveying pipeline. The powder cutters at different positions form multiple shearing lines along the axial direction. When the corner cutting chamber is feeding as a whole, the powder cutters at different positions apply shearing to the impurities in sequence and segment. First, the front powder cutter cuts the impurities in front of them, destroying the local structure. As the feeding motion continues to deepen, the powder cutters in the middle area interrupt the impurities and perform secondary shearing, further disintegrating the relative integrity of the impurities. Finally, the impurities are handed over to the rear powder cutter to process the tail end, achieving progressive crushing across the entire length range.

[0045] By gradually breaking down the internal agglomeration structure of impurities, the shearing force is dispersed, avoiding stress concentration on a single cutting surface that could cause impurities to slip. At the same time, the gaps between the staggered powder cutters can accommodate the sheared fragments, reducing the accumulation of impurities on the powder cutter surface. This ensures continuous shearing efficiency without dead angles, avoids ineffective pushing operations, further optimizes the shearing path, and achieves a better shearing environment for the powder cutter and impurities, while improving the relative stability of the powder cutter's shearing effect before and after a given cycle. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0047] Figure 2This is a plan view of the internal structure of the powder collection chamber of the present invention.

[0048] Figure 3 This is a three-dimensional cross-sectional view of the internal structure of the powder recycling chamber of this invention.

[0049] Figure 4 This is a three-dimensional view of a partial structure of the feeding unit of the present invention.

[0050] Figure 5 This is a three-dimensional cross-sectional view of the internal structure of the shaft seal cylinder and the work station ring pipe in this invention.

[0051] Figure 6 This is a partial assembly cross-sectional view of the shaft seal cylinder and station ring pipe of the present invention.

[0052] Figure 7 This is a three-dimensional view of the outer corner cylinder and its partial structure of the present invention.

[0053] Figure 8 This is a partial structural plan view of the decomposition unit of the present invention.

[0054] Figure 9 This is a partial structural plan view of another part of the decomposition unit of the present invention.

[0055] Figure 10 This is a three-dimensional view of the cross-section of the internal structure of the outer corner cylinder of the present invention.

[0056] Figure 11 This is a three-dimensional view of the corner cutting chamber and its partial structure in this invention.

[0057] Figure 12 This is a plan view of the internal structure of the corner cutting chamber of the present invention.

[0058] The diagram shows: 1. Powder recycling bin; 2. Feeding unit; 3. Disassembly unit;

[0059] 11. Screening main control panel; 12. Electromagnetic feed valve pipe; 13. Screen body assembly; 14. Main control box; 15. Explosion-proof frame; 16. Powder collection bin; 17. Residual powder transfer pipe; 18. Impurity collection assembly;

[0060] 21. Pulse jet valve pipe; 22. Conical feeder; 23. Screen column; 24. End platform; 25. Guide platform; 26. Dustproof casing; 27. Motor base; 28. Servo motor; 29. ​​Main position electric telescopic rod;

[0061] 211. Screwdriver; 212. Bridge bracket; 213. Bridge column; 214. Stepper motor; 215. Inlet frame; 216. Converter; 217. Powder conveying pipe; 218. Secondary electric telescopic rod; 219. Double-headed buckle plate;

[0062] 31. Shaft seal cylinder; 32. Shaft seat; 33. Electric telescopic air rod; 34. End seat; 35. Angle plate; 36. Angle post; 37. Circular scraper;

[0063] 311. Corner outer ring; 312. Double-headed support column; 313. Workstation ring pipe; 314. Corner strip; 315. Decorative panel; 316. Flexible rubber head;

[0064] 321. Outer cylinder; 322. Inner cylinder; 323. Shaft base; 324. Corrugated plate; 325. Keyway; 326. Support rod; 327. Angle seat; 328. Extension spring; 329. Ball bearing;

[0065] 331. T-section column; 332. Drive gear; 333. Hanger rod; 334. One-way rack; 335. Long strip ring plate; 336. Spring ball joint rod; 337. Single-headed firing pin;

[0066] 341. Single-head base; 342. Single-panel plate; 343. Vertical plate; 344. Spring column; 345. Support base; 346. Electromagnet; 347. Electrode column; 348. Electrode cap;

[0067] 351. Angle cutting chamber; 352. Slitting plate; 353. Angle slot; 354. Straight plate; 355. Powder cutter; 356. Ring blow valve head; 357. Internal plate; 358. Spring telescopic rod;

[0068] 361. Angle shaft; 362. Cam; 363. Drive shaft; 364. Main gear; 365. Intermediate gear; 366. Stage gear; 367. Terminal gear. Detailed Implementation

[0069] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0070] It should be noted that the terms "vertical," "horizontal," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0071] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0072] Reference Figure 1 and Figure 2 It can be seen that the powder anti-oxidation high-pressure pulse conveying equipment based on metal 3D printer includes a powder recycling bin 1, a feeding unit 2 is provided at the shaft center of the powder recycling bin 1, and a decomposition unit 3 is provided on one side of the feeding unit 2.

[0073] Reference Figure 1 It is known that a screening main control panel 11 is installed outside the powder recycling chamber 1. An electromagnetic feed valve pipe 12 is plugged into and snapped onto the side of the screening main control panel 11 near the powder recycling chamber 1. A screen assembly 13, which is snapped onto the screening main control panel 11, is located at the end of the electromagnetic feed valve pipe 12 near the powder recycling chamber 1. The screen assembly 13 is connected to the powder recycling chamber 1 via a flexible hose. A main control electrical box 14, which is snapped onto the screening main control panel 11, is located on one side of the screen assembly 13. 3. On the other side, there is an explosion-proof frame 15. A powder collection chamber 16 is snapped into the middle of the explosion-proof frame 15. The powder collection chamber 16 is snapped into the powder recirculation chamber 1. The powder collection chamber 16 is plugged into the end away from the screen assembly 13 and a residual powder transmission pipe 17 is snapped into it. The main control box 14 and the screen assembly 13 are connected together with an impurity collection assembly 18 that is snapped into the screening main control panel 11. The impurity collection assembly 18 is connected to the screen assembly 13 through a hose.

[0074] Reference Figure 2 , Figure 3 and Figure 4 It can be seen that the feeding unit 2 includes: a blow valve pipe 21, which is plugged and snapped into the middle of the outer wall of the powder recirculation pipe; a conical feeder 22, which is snapped into the end of the blow valve pipe 21 near the axis of the powder recirculation chamber 1, and the conical feeder 22 is coaxially arranged with the powder recirculation chamber 1; a screen column 23, which is circumferentially snapped into the inner wall of the end of the conical feeder 22 away from the shaft seal pipe; and an end platform 24, which is coaxially arranged on the side of the powder recirculation chamber 1 away from the shaft seal pipe, and the end platform 24 is snapped into the conical feeder 22.

[0075] The guide table 25 is snapped onto the middle of the end face of the end table 24 away from the shaft seal tube; in addition, the cross-sectional shape of the guide table 25 is an isosceles trapezoid; the dustproof cylinder 26 is snapped onto the end face of the end table 24 away from the shaft seal tube; the motor base 27 is snapped onto the end face of the end table 24 away from the shaft seal tube, and the motor base 27 is located inside the dustproof cylinder 26; the servo motor 28 is snapped onto the end of the motor base 27 away from the end table 24; the main position electric telescopic rod 29 is snapped onto the output end of the servo motor 28, and the main position electric telescopic rod 29 penetrates the end table 24 and extends into the conical feeder 22;

[0076] Reference Figure 3 and Figure 4It can be seen that the end of the main electric telescopic rod 29 away from the motor base 27 is fitted with an auger 211. A bridging bracket 212 is fitted with the middle of the inner wall of one side of the powder recirculation chamber 1. A bridging column 213 is fitted with the end of the bridging bracket 212 near the axis of the powder recirculation chamber 1. A stepper motor 214 is fitted with the middle of the end face of the bridging column 213 near the motor base 27. A joint bracket is fitted together with the stepper motor 214 and the bridging bracket 212. 215. A converter platform 216 is snapped onto the end of the bridging post 213 away from the stepper motor 214. A powder conveying pipe 217 is symmetrically snapped onto the end face of the converter platform 216 away from the stepper motor 214. A secondary electric telescopic rod 218 is snapped onto the middle position of the end face of the converter platform 216 away from the bridging post 213. A double-headed buckle plate 219, which is snapped onto the outer wall of the converter platform 216, is snapped onto the end of the secondary electric telescopic rod 218 away from the bridging post 213.

[0077] Simple process for powder recycling:

[0078] S1.1 - Feed Pretreatment:

[0079] The user controls the opening of the electromagnetic feed valve pipe 12 through the screening main control panel 11 (the electromagnetic feed valve pipe 12 enables precise on / off control of the feed). The metal powder to be processed (recycled residual powder or new powder) is conveyed to the screen body assembly 13 through the valve pipe (in specific implementation, an ultrasonic vibrator is added in a predetermined area to initially break up the agglomerates in the powder, so as to avoid large impurities from directly entering the screening process and reduce the load on the screen body).

[0080] S1.2 - Collaborative screening:

[0081] The sieve assembly 13 starts the sieving function to classify the initially dispersed powder by particle size and initially separate qualified particle size powder from impurities (in this process, the main electric telescopic rod 29 can be extended and retracted by the servo motor 28, which drives the sieve column 23 distributed in the inner circumference of the conical feeder 22 to move, and performs secondary fine sieving of the powder entering the conical feeder 22).

[0082] S1.3 - Qualified powder re-transportation:

[0083] After preliminary simple screening by the sieve assembly 13 and the feeding unit 2, the qualified powder is transported from the sieve assembly 13 to the powder recycling chamber 1 through the hose (not shown in the figure) (the explosion-proof safety of the aforementioned links is ensured by the powder collection chamber 16 and the explosion-proof frame 15). Finally, the qualified residual powder is transported to the powder storage system of the metal 3D printer through the residual powder transfer pipe 17, waiting for the powder to be re-supplyed.

[0084] S1.4 - Impurity Treatment:

[0085] Large particle agglomerates and metal debris separated during the screening process are transported from the screen assembly 13 to the impurity collection assembly 18 through a hose. The impurities are temporarily stored in the assembly and then cleaned or disposed of after accumulating to a certain amount, in order to prevent impurities from mixing into qualified powder.

[0086] The blow valve pipe 21 blows airflow into the powder conveying pipe 217 through the conical feeder 22 to prevent the powder from forming arch bridges on the inner wall of the powder conveying pipe 217 and between the conical feeder 22, thus ensuring continuous powder flow.

[0087] Dustproof cylinder 26 and guide table 25: The dustproof cylinder 26 isolates the circulation channel between the servo motor 28 and the main electric telescopic rod 29 (the connection end with the servo motor 28) and the outside world, so as to avoid the interaction between the powder and the aforementioned components during the conveying process that would affect normal operation.

[0088] The guide platform 25 further guides the powder flowing between the sieve assembly 13 and the powder collection bin 16, reducing local accumulation and improving powder flowability.

[0089] Main control box 14: Provides necessary power supply, and integrates a central processing unit and necessary PLC control programs to achieve automated control and connection between the aforementioned units;

[0090] Alternating process of powder conveying pipe 217 at different positions:

[0091] Prerequisite: Achieving a predetermined cycle of powder conveying in a single powder conveying pipe with 217 channels;

[0092] The auger 211 is controlled by the main electric telescopic rod 29 to move a predetermined distance toward the motor base 27. At the same time, the double-headed buckle plate 219, under the control of the auxiliary electric telescopic rod 218, drives the powder conveying pipe 217 to move a predetermined distance away from the motor base 27 until the auger 211 (in specific implementation, the main electric telescopic rod 29, under the synchronous influence of the servo motor 28, controls the auger 211 to continuously convey the powder in the powder conveying pipe 217) completely detaches from the powder conveying pipe 217 (i.e., in the current state, the two do not have any spatial intersection).

[0093] Subsequently, driven by the stepper motor 214, the bridging column 213 synchronously controls the changeover table 216 to change its angle until the positions of the powder conveying pipes 217 in different areas complete the predetermined alternation (the bridging bracket 212 provides a stable support environment for the bridging column 213, ensuring the movement accuracy between the bridging column 213 and the changeover table 216; at the same time, the frame 215 ensures a safe and stable operating environment for the stepper motor 214).

[0094] It should be noted that in the initial state, the shaft seal tube and the powder conveying tube 217 are completely separated (to avoid the shaft seal tube affecting the normal angle change of the powder conveying tube 217 when the angle of the changeover table 216 changes - that is, to avoid collision and limiting).

[0095] Reference Figure 2 , Figure 3 and Figure 5 It can be seen that the decomposition unit 3 includes: a shaft seal cylinder 31, which is plugged into and snapped onto the end of the powder recirculation chamber 1 near the gravity; a shaft seat 32, which is rotatably fitted onto the middle position of the inner wall of the shaft seal cylinder 31 near the gravity; an electric telescopic rod 33, which is snapped onto the end face of the shaft seat 32 away from the gravity; an end seat 34, which is snapped onto the end of the electric telescopic rod away from the shaft seat 32; an angle plate 35, which is snapped onto the outer wall of the movable end of the electric telescopic rod; angle posts 36, which are circumferentially distributed on the outer side of the end face of the angle plate 35 away from the shaft seat 32, and the angle posts 36 are snapped onto the angle plate 35; and an annular scraper 37, which is disposed between the angle plate 35 and the end seat 34, and the annular scraper 37 is snapped onto the outer wall of the end seat 34.

[0096] Reference Figure 4 , Figure 5 and Figure 6 It can be seen that an outer corner ring 311 is snapped onto the outer wall of the end of the shaft seal tube away from the shaft seat 32. A double-headed support column 312 is installed in a circumferentially uniform insertion manner on the outer end face of the outer corner ring 311. A station ring tube 313 is provided on the side of the shaft seal tube away from the shaft seat 32, which is slidably snapped onto the double-headed support column 312. The inner diameter of the station ring tube 313 is the same as the inner diameter of the shaft seal tube. The inner diameter of the station ring tube 313 is larger than the outer diameter of the powder conveying pipe 217. An angle strip 314 is snapped onto the outer wall of the station ring tube 313. An angle groove that matches the angle strip 314 is opened on the inner wall of the powder recirculation chamber 1. A decorative panel 315 is installed in a circumferentially uniform snap-fit ​​manner on the inner wall of the end of the station ring tube 313 away from the shaft seat 32. The decorative panel 315 and the double-headed support column 312 are staggered. An elastic rubber head 316 is slidably snapped onto the station ring tube 313 and the decorative panel 315.

[0097] Reference Figure 7 , Figure 8 and 10It can be seen that an outer corner cylinder 321 is snapped onto the end of the end seat 34 away from the shaft seat 32. An inner corner cylinder 322 is snapped onto the inside of the outer corner cylinder 321. The outer wall of the inner corner cylinder 322 is evenly provided with through grooves. A shaft platform 323 is provided at the shaft center of the inner corner cylinder 322 and is rotatably fitted with the outer corner cylinder 321. A wave plate 324 is evenly snapped onto the end face of the shaft platform 323 away from the end seat 34. A keyway 325 is evenly provided on the outer wall of the outer corner cylinder 321. A support rod 326 is symmetrically provided inside the keyway 325 and is snapped onto the outer corner cylinder 321. An angle seat 327 is slidably snapped onto the middle position of the outer wall of the two support rods 326 in the same group. A telescopic spring 328 sleeved on the outer wall of the support rod 326 is snapped onto the angle seat 327 and the outer corner cylinder 321. A ball bearing 329 is rolled onto the middle position of the angle seat 327.

[0098] Reference Figure 7 , Figure 8 and Figure 10 It can be seen that a T-section column 331 is installed through the middle of the ball bearing 329 in a rotating fit. A drive gear 332 is snapped onto the outer wall of the T-section column 331 near the axis of the outer cylinder 321. A hanger 333 is circumferentially snapped onto the inner wall of the inner cylinder 322 away from the end seat 34. A one-way rack 334 that meshes with the drive gear 332 is snapped onto the end of the hanger 333 near the end seat 34. A long strip ring plate 335 that is snapped onto the outer wall of the T-section column 331 near the axis of the outer cylinder 321 is rotatably fitted with the inner cylinder 322. A spring ball head rod 336 is symmetrically slidably snapped onto the inner wall of the inner cylinder 322 in a through groove. A single-headed firing pin 337 that cooperates with the wave plate 324 is snapped onto the middle of the outer wall of the long strip ring plate 335 near the end seat 34.

[0099] Reference Figure 7 and Figure 9 It can be seen that a single-head seat 341 is snapped onto the middle position of the end face of the keyway 325 near the end seat 34. A single-panel 342 is snapped onto the end of the single-head seat 341 away from the end seat 34. A vertical plate 343 is symmetrically snapped onto the end face of the single-panel 342 away from the single-head seat 341. Spring columns 344 are snapped onto the opposite sides of the vertical plate 343. A support seat 345 is symmetrically slidably snapped onto the middle area of ​​the end face of the single-panel 342 away from the end seat 34. The support seat 345 and the spring column 344 are slidably snapped onto each other. Electromagnets 346 are snapped onto the middle position of the opposite sides of the two support seats 345 in the same group. An electrode column 347 is snapped onto the middle position of the end of the support seat 345 near the single-head seat 341. An electrode cap 348 that mates with the electrode column 347 is snapped onto the middle position of the end of the vertical plate 343 near the single-head seat 341.

[0100] Reference Figure 10 , Figure 11 and Figure 12 It can be seen that an angle cutting chamber 351 is snapped onto the end of the T-section column 331 away from the axis of the outer cylinder 321. A cutting plate 352 is snapped onto the inside of the end of the angle cutting chamber 351 away from the T-section column 331. An angle slot 353 is arrayed and staggered on the end face of the angle cutting chamber 351 away from the outer cylinder 321 and the end face of the cutting plate 352. A straight plate 354 is symmetrically and slidingly snapped onto the end face of the cutting plate 352 away from the outer cylinder 321. The end face of the straight plate 354 away from the outer cylinder 321 is arrayed and staggered. A powder cutter 355 with an extended corner groove 353 is uniformly snapped together in a row, and the powder cutter 355 and the corner groove 353 are slidably fitted together. A ring blow valve head 356 is snapped together on the outer wall of the powder cutter 355 away from the corner outer cylinder 321. The end face of the cutting plate 352 away from the corner outer cylinder 321 is symmetrically snapped together with an inner plate 357 that is slidably assembled with the straight plate 354. The end face of the inner plate 357 is uniformly and slidably snapped together with a spring telescopic rod 358 that is snapped together with the straight plate 354.

[0101] Reference Figure 11 and Figure 12 It can be seen that the cutting plate 352 has a through-type rotating fitting of the angle shaft 361 in the middle position. The outer wall of the angle shaft 361 away from the angle outer cylinder 321 is fitted with a cam 362. The space on one side of the T-section column 331 away from the angle outer cylinder 321 is provided with a drive shaft 363 that is rotatably fitted with the angle cutting chamber 351. The outer wall of the T-section column 331 near the angle shaft 361 is fitted with a main gear 364. The middle position of the outer wall of the drive shaft 363 is fitted with a position gear 365 that meshes with the main gear 364. The outer wall of the drive shaft 363 near the angle shaft 361 is fitted with a step gear 366. The outer wall of the angle shaft 361 near the T-section column 331 is fitted with a terminal gear 367 that meshes with the step gear 366.

[0102] A simplified vibration damping process for the 217 positions of the powder conveying pipe during the feed motion of the decomposition unit 3:

[0103] Under the control of the electric telescopic pneumatic rod 33, the corner plate 35 synchronously drives the corner column 36 to move towards the powder conveying pipe 217. After the corner column 36 has moved a predetermined distance, it gradually comes into contact with the station ring pipe 313 (that is, in the initial state, the corner column 36 and the station ring pipe 313 are completely separated). After that, the station ring pipe 313 moves steadily towards the powder ring pipe under the lifting action of the corner column 36 (in specific implementation, the movement accuracy of the station ring pipe 313 is further improved by the high-precision assembly between the corner bar 314 and the corner groove).

[0104] During this process, the decorative panel 315 and the station ring pipe 313 jointly provide a stable working environment for the elastic rubber head 316. At the same time, the elastic rubber head 316 provides a relatively flexible and stable auxiliary shock-absorbing support for the powder conveying pipe 217 through its own expansion and contraction properties (to a certain extent reducing the assembly tolerance caused by radial runout (ensuring the reassembly accuracy between the powder conveying pipe 217 and the converter table 216 after the converter table 216 rotates, and stabilizing the powder conveying path)).

[0105] Outer corner ring 311 and double-headed support column 312: Through the linkage between the two, the relative motion accuracy between the station ring pipe 313 and the powder conveying pipe 217 is further ensured;

[0106] The process of determining the relative interaction between impurities on the inner wall of the powder conveying pipe 217 and the powder cutter 355, exceeding a predetermined value:

[0107] In specific implementation, under the overall influence of the electric telescopic air rod 33, the angle cutting chamber 351 tends to move relative to the impurities along the axial direction of the powder conveying pipe 217. During this process, when the relative shearing between the powder cutter 355 (at the initial angle) and the impurities becomes stuck or stops, the relative interaction between the ball bearing 329 and the support seat 345 continues to deepen (in the current state, the ball bearing 329 tends to move in the opposite direction to the shaft seat 32), until the support seat 345 compresses the spring column 344 under the squeezing action of the ball bearing 329 (at this time, the ball bearing 329 has completed the predetermined distance of movement towards the shaft seat 32, and through the elastic properties of the spring column 344 itself, it is ensured that when the ball bearing 329 returns to the initial position, the support seat 345 can move synchronously to the initial position, ensuring the long-term effectiveness and continuity of the aforementioned scheme). When the electrode cap 348 contacts the electrode column 347 and the electromagnet 346 separates, it is determined that in the current state, the relative interaction between the impurities and the powder cutter 355 exceeds the predetermined value.

[0108] Angle seat 327, telescopic spring 328, and spring ball head rod 336: Through the telescopic assembly between the angle seat 327 and the telescopic spring 328, it is ensured that when the relative force between the impurities and the powder cutter 355 is at a normal value, it can provide auxiliary fall support to the T-section column 331; at the same time, it can work with the spring ball head rod 336 to provide relatively stable shock absorption auxiliary support for the entire movement process of the T-section column 331, thereby ensuring the overall relative stability of the movement of the T-section column 331;

[0109] The process of changing the relative angle between the powder cutter 355 and the impurities by the angle cutting chamber 351 as a whole:

[0110] Prerequisite 1: The relative interaction between the impurities and the powder cutter at 355° (current relative angle) exceeds a predetermined value;

[0111] Precondition 2: When the drive gear 332 moves towards the shaft seat 32 following the T-section column 331, it does not mesh with the one-way rack 334. That is, during the movement of the drive gear 332 towards the gravity side, the one-way rack 334 will not change the angle of the drive gear 332.

[0112] First, the built-in motor inside the end seat 34 drives the shaft platform 323 to rotate at a predetermined angle. During this process, the wave plate 324 continuously and gradually changes the relative depth of action with the single-headed firing pin 337 until the T-section column 331 moves towards the initial predetermined area under the reverse force of the single-headed firing pin 337 (in specific implementation, the long strip ring plate 335 is a telescopic plate, thereby removing the restriction of the T-section column 331's degree of freedom by the long strip ring plate 335).

[0113] Next, by driving the gear 332 to mesh with the rack during the return stroke, the predetermined angle of the T-segment column 331 is adjusted.

[0114] Finally, by synchronizing the movement between the angle cutting chamber 351 and the T-section column 331, the relative angle between the powder cutter 355 at one end of the angle cutting chamber 351 and the impurities is changed as a whole (this changes the overall powder cutter 355 - all powder cutters 355 at the same end of the angle cutting chamber 351).

[0115] Further adjustment process for the powder cutter 355 at different locations (the aforementioned powder cutter 355 belongs to the corner cutting chamber 351 at one end):

[0116] Prerequisite: When the relative angle of column 331 in segment T changes;

[0117] First, under the synchronous control of the T-segment column 331, the main gear 364 continuously generates relative meshing motion with the interposition gear 365;

[0118] Next, the locating gear 365 synchronously controls the transmission shaft 363 to drive the tiered gear 366 to rotate a predetermined number of revolutions or angles. Then, through further meshing between the tiered gear 366 and the terminal gear 367, the final differential transmission is completed, thereby achieving the goal of different rotational speeds between the T-segment column 331 and the angle shaft 361 (avoiding synchronous movement between the angle shaft 361 and the T-segment column 331).

[0119] Finally, during the synchronous movement of the cam 362 with the same angle shaft 361, the relative interaction between the cam 362 and the straight plate 354 is continuously and dynamically changed (during this process, the straight plate 354 drives the spring telescopic rod 358 to move towards the inner plate 357, and the spring telescopic rod 358 itself is compressed to a certain range, ensuring that the straight plate 354 can change the position of the powder cutter 355 while providing the powder cutter 355 with the necessary support for stable mutual shearing with impurities).

[0120] Ring blow valve head 356: In specific implementation, the ring blow valve head 356 can be connected through an external hose to provide a stable air source to the area of ​​the powder cutter 355, further avoiding the probability of relative "pushing" abrasive contact between the powder cutter 355 and the powder, and improving the powder cleaning effect.

[0121] The decomposition unit 3 completes the cleaning process of impurities on the inner wall of the 217 channels of the powder conveying pipe:

[0122] In practice, the shaft seat 32 is driven by an external motor to rotate a predetermined angle or number of revolutions, thereby dynamically adjusting the coverage between the powder cutter 355 and the impurities. Then, the powder cutter 355 is repeatedly driven to move or retract into the powder conveying pipe 217 by the electric telescopic air rod 33 (it stops when the relative movement between the impurities and the powder cutter 355 exceeds a predetermined value and "retracts" until the angle of the powder cutter 355 is adjusted, and then the feeding motion is performed again). When the complete cleaning process of the local annular surface is completed, the annular scraper 37 is controlled by the electric telescopic air rod 33 to perform a supplementary overall scraping process on the aforementioned annular surface. This process is repeated until the overall processing of the inner wall of the powder conveying pipe 217 (single) is completed.

[0123] The working principle of the powder anti-oxidation high-pressure pulse conveying equipment based on metal 3D printer provided by the present invention is as follows: First step: First, the powder after screening is introduced into the powder conveying pipe 217 pipeline area through the conical feeder 22 (under the action of gravity). Then, by utilizing the motion synchronization between the main electric telescopic rod 29 and the servo motor 28, the auger 211 is controlled to continuously convey the powder in the powder conveying pipe 217 pipeline area in a progressive manner until the powder is conveyed to the predetermined area in an orderly manner.

[0124] During this process, the stepper motor 214 controls the bridge to drive the converter 216 to rotate at a predetermined angle, thereby realizing the alternation of positions between different powder conveying pipes 217. Furthermore, through the extension and retraction of the auxiliary electric telescopic rod 218, the two powder conveying pipes 217 that have undergone the aforementioned position alternation are synchronously controlled to move in the opposite direction to the auger 211 until the powder conveying pipes 217 are completely separated from the auger 211.

[0125] Step 2: Then, under the stable support of the shaft seat 32, the electric telescopic air rod 33 synchronously controls the end seat 34 to drive the outer cylinder 321 to move in the opposite direction to the powder conveying pipe 217 (non-operation) until the powder cutter 355 cuts and breaks up the impurities or agglomerated impurities along the way.

[0126] During this process, the contact between electrode post 347 and electrode cap 348 and the separation of electromagnet 346 provide dual signal collaborative judgment environment to ensure the relative motion state between support 345 and ball 329 in the current state, and provide high-precision real-time dynamic feedback on whether the interaction relationship between external impurities and powder cutter 355 exceeds the predetermined value.

[0127] When the relative interaction between the powder cutter 355 and the impurities exceeds a predetermined value, the synchronous drive shaft 323 drives the wave plate 324 to rotate a predetermined angle or number of revolutions until the single-head striker 337, under the squeezing action of the wave plate 324, controls the T-section column 331 to return to its initial position. During this process, the drive gear 332 and the one-way rack 334 mesh to a predetermined degree, dynamically adjusting the relative angle between the angle cutting chamber 351 and the impurities in the current state. Through the differential speed cooperation between the main position gear 364, the position gear 365, the grading gear 366 and the terminal gear 367, the relative interaction depth between the cam 362 and the angle plate is synchronously and dynamically changed, further adjusting the distance between adjacent powder cutters 355 and improving the shearing effect of the powder cutter 355.

[0128] Step 3: Finally, by repeatedly moving the electric telescopic air rod 33, the optimal shearing angle between the powder cutter 355 and the impurities is continuously adjusted. After the powder cutter 355 completes the shearing process, the electric telescopic air rod 33 is used again to control the annular scraper 37 to feed to a predetermined depth to perform a supplementary and complete scraping and cleaning process on the crushed area of ​​the powder cutter 355. Then, by switching the angle of the conversion table 216, it is ensured that the decomposition unit 3 can perform alternating cleaning operations on the inner wall of the powder conveying pipe 217 at different locations, thereby avoiding or reducing the occurrence of bridging.

[0129] The circuits and controls involved in this invention are all existing technologies and will not be described in detail here.

[0130] The above are merely embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. Powder anti-oxidation high pressure pulsating conveying equipment based on metal 3D printer, comprising a powder recirculation bin (1), characterized in that: The powder recycling bin (1) is provided with a feeding unit (2) at the center of the shaft, and the feeding unit (2) is provided with a decomposition unit (3) on one side; The decomposition unit (3) comprises: The shaft sealing tube (31) is inserted and connected to the powder recycling bin (1) near the gravity end; The shaft seat (32) is rotatably connected to the inner wall of the shaft sealing tube (31) near the gravity end; The electric telescopic air rod (33) is connected to the shaft seat (32) away from the gravity side; The end seat (34) is connected to the electric telescopic rod away from the shaft seat (32); The angle disc (35) is connected to the outer wall of the movable end of the electric telescopic rod; The angle column (36) is circumferentially distributed on the outer side of the end face of the angle disc (35) away from the shaft seat (32), and the angle column (36) is connected to the angle disc (35). The shaft sealing tube is connected to the outer wall of the end seat (34) away from the shaft seat (32), and the outer side end face of the angle outer ring (311) is circumferentially and uniformly inserted and connected to the double-headed support column (312). The work station ring tube (313) is slidably connected to the double-headed support column (312) on the side of the shaft sealing tube (313) away from the shaft seat (32). The inner diameter of the work station ring tube (313) is the same as the inner diameter of the shaft sealing tube. The inner diameter of the work station ring tube (313) is greater than the outer diameter of the powder conveying pipe (217). The angle strip (314) is connected to the outer wall of the work station ring tube (313). The powder recycling bin (1) has an angle groove (314) on the inner wall. The inner wall of the work station ring tube (313) away from the shaft seat (32) is circumferentially and uniformly connected to the veneer (315). The veneer (315) is distributed in a staggered manner between the double-headed support column (312). The elastic rubber head (316) is slidably connected between the work station ring tube (313) and the veneer (315).

2. The powder anti-oxidation high pressure pulsating conveying device based on metal 3D printer according to claim 1, characterized in that: The end seat (34) is connected to the outer wall of the end seat (34) away from the shaft seat (32), and the outer wall of the angle inner tube (322) is uniformly provided with a through groove. The shaft table (323) is rotatably connected to the angle outer tube (321) at the center of the angle inner tube (322). The wave plate (324) is circumferentially and uniformly connected to the side end face of the shaft table (323) away from the end seat (34). The key groove (325) is uniformly provided on the outer wall of the angle outer tube (321). The support rod (326) is connected to the key groove (325) in a symmetrical manner. The angle seat (327) is slidably connected between the two support rods (326) in the same group. The extension spring (328) is sleeved on the outer wall of the support rod (326) and is connected to the angle seat (327). The ball (329) is rotatably connected to the middle position of the angle seat (327).

3. The powder anti-oxidation high pressure pulsating conveying device based on metal 3D printer according to claim 2, characterized in that: ​ 4. The powder anti-oxidation high pressure pulsating conveying device based on metal 3D printer according to claim 3, characterized in that: The middle position of the ball (329) is installed through the rotation fitting of T section column (331), the T section column (331) is installed with driving gear (332) on the outer wall of the axis of the corner outer cylinder (321) close to one end, the corner inner cylinder (322) is installed with hanging rod (333) on the inner wall of the end base (34) far from one end, the hanging rod (333) is installed with one-way rack (334) close to the end base (34) on one end, the T section column (331) is installed with long strip ring plate (335) close to the outer wall of the axis of the corner outer cylinder (321) on one end, the spring ball head rod (336) is installed in the outer wall of the corner inner cylinder (322) in the form of symmetrical sliding and clamping, the long strip ring plate (335) is installed with single head striker (337) close to the outer wall of the end base (34) on one side of the middle position.

5. The powder anti-oxidation high pressure pulsating conveying device based on metal 3D printer according to claim 4, characterized in that: The keyway (325) is installed with single head base (341) on the middle position of the end face of the end base (34) on one side, the single head base (341) is installed with single face plate (342) on the end far from the end base (34), the single face plate (342) is installed with vertical plate (343) on the side end face far from the single head base (341) in the form of symmetrical clamping, the vertical plate (343) is installed with spring stand column (344) on the opposite surface, the single face plate (342) is installed with support base (345) on the middle area of the side end face far from the end base (34) in the form of symmetrical sliding and clamping, the support base (345) is installed with electromagnet (346) on the opposite surface of the middle position of the same group of two support bases (345), the support base (345) is installed with electrode column (347) on the middle position of the end close to the single head base (341), the vertical plate (343) is installed with electrode cap (348) on the middle position of the end close to the single head base (341).

6. The powder anti-oxidation high pressure pulsating conveying device based on metal 3D printer according to claim 5, characterized in that: The T section post (331) is provided with an angle cutting bin (351) at one end away from the axis of the angle outer cylinder (321), the angle cutting bin (351) is provided with a cutting plate (352) at one end away from the T section post (331), the end face of the angle cutting bin (351) away from the angle outer cylinder (321) and the end face of the cutting plate (352) are both provided with angle position grooves (353) in an array and staggered, the end face of the cutting plate (352) away from the angle outer cylinder (321) is provided with a straight mouth plate (354) in a symmetrical sliding and clamping manner, the end face of the straight mouth plate (354) away from the angle outer cylinder (321) is provided with cutting powder devices (355) in an array and evenly clamped and extending out of the angle position grooves (353), the cutting powder devices (355) are slidingly and clampingly arranged with the angle position grooves (353), the outer wall of the cutting powder devices (355) away from the angle outer cylinder (321) is provided with a ring blowing valve head (356), the end face of the cutting plate (352) away from the angle outer cylinder (321) is provided with an embedded plate (357) in a symmetrical clamping manner and slidingly and clampingly arranged with the straight mouth plate (354), the end face of the embedded plate (357) is provided with spring telescopic rods (358) in an array and evenly slidingly and clampingly arranged with the straight mouth plate (354).

7. The powder anti-oxidation high pressure pulsating conveying device based on metal 3D printer according to claim 6, characterized in that: The cutting plate (352) is provided with an angle shaft (361) in a penetrating and rotating manner at the middle position, the outer wall of the angle shaft (361) away from the angle outer cylinder (321) is provided with a cam (362), the side space of the T section post (331) away from the angle outer cylinder (321) is provided with a transmission shaft (363) in a rotating and clamping manner with the angle cutting bin (351), the outer wall of the T section post (331) close to the angle shaft (361) is provided with a main position gear (364), the outer wall of the transmission shaft (363) is provided with a sub position gear (365) in a clamping manner and engaged with the main position gear (364), the outer wall of the transmission shaft (363) close to the angle shaft (361) is provided with a sub-stage gear (366), the outer wall of the angle shaft (361) close to the T section post (331) is provided with a terminal gear (367) in a clamping manner and engaged with the sub-stage gear (366).

8. The powder anti-oxidation high pressure pulsating conveying device based on metal 3D printer according to claim 7, characterized in that: The feeding unit (2) comprises: The blowing valve pipe (21) is inserted and clamped on the middle position of the outer wall of the powder recycling pipe; The tapered feeder (22) is clamped on the end of the blowing valve pipe (21) close to the axis of the powder recycling bin (1), and the tapered feeder (22) is coaxially arranged with the powder recycling bin (1); The sieve column (23) is evenly clamped on the inner wall of the tapered feeder (22) away from the shaft seal pipe; The end table (24) is coaxially arranged on the side of the powder recycling bin (1) away from the shaft seal pipe, and the end table (24) is clamped between the tapered feeder (22); The material guide table (25) is clamped on the middle position of the end face of the end table (24) away from the shaft seal pipe; in addition, the cross section of the material guide table (25) is isosceles trapezoidal; The dustproof cylinder (26) is clamped on the end face of the end table (24) away from the shaft seal pipe; The motor base (27) is clamped and installed on the end surface of the end table (24) away from the shaft seal pipe, and the motor base (27) is located in the dustproof cylinder (26); The servo motor (28) is clamped and installed on the end of the motor base (27) away from the end table (24); The main position electric telescopic rod (29) is clamped and installed on the output end of the servo motor (28), and the main position electric telescopic rod (29) penetrates the end table (24) and extends into the conical mouth feeder (22).

9. The powder anti-oxidation high pressure pulsating conveying device based on metal 3D printer according to claim 8, characterized in that: The main position electric telescopic rod (29) is clamped and installed on the end of the motor base (27) away from the end table (24); The main position electric telescopic rod (29) is clamped and installed on the output end of the servo motor (28), and the main position electric telescopic rod (29) penetrates the end table (24) and extends into the conical mouth feeder (22).

10. The powder anti-oxidation high pressure pulsating delivery apparatus based on metal 3D printer of claim 1, wherein: The powder recycling bin (1) is provided with a screening main control table (11) outside, the screening main control table (11) is clamped and installed on the side of the powder recycling bin (1) close to the powder recycling bin (1) by inserting type clamping, the electromagnetic feeding valve pipe (12) is provided with a sieve assembly (13) clamped and assembled with the screening main control table (11) on the end close to the powder recycling bin (1), and the sieve assembly (13) is connected with the powder recycling bin (1) through a hose, the sieve assembly (13) is provided with a main control electric box (14) clamped and assembled with the screening main control table (11) on one side, the sieve assembly (13) is provided with an explosion-proof framework (15) on the other side, the explosion-proof framework (15) is clamped and installed with a powder collecting bin (16) at the middle position, and the powder collecting bin (16) is clamped and assembled with the powder recycling bin (1), the powder collecting bin (16) is clamped and installed with a powder collecting bin (16) on the end away from the sieve assembly (13) by inserting type clamping, the main control electric box (14) and the sieve assembly (13) are provided with a foreign matter collecting assembly (18) clamped and assembled with the screening main control table (11) together, and the foreign matter collecting assembly (18) and the sieve assembly (13) are connected through a hose.

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