Metal powder spreading mechanism and 3D printing device

Abstract

The application discloses a kind of metal powder powder laying mechanism and 3D printing device, it is related to metal powder processing technical field, it aims at solving the technical problem that traditional 3D printing device is low in functionality, it is difficult to realize the laying of single layer multiple metal powder, including double-shaft moving component, L type seat, drive assembly and powder laying component.The round material cavity of the application is separated from the ring material cavity design, different metal powder can be stored respectively, when half cylinder is rotated to the inclined state, pre-storage material groove A and pre-storage material groove B are communicated with the outside, half cylinder and convex column constitute scraping flat form, drive assembly is used to drive rotation, complete the synchronous laying of multiple metal powder in single layer, when half cylinder is rotated to the horizontal state, the bottom surface of half cylinder is flush with the bottom surface of convex column, half cylinder and convex column constitute compacted form, convex column and half cylinder are driven to descend using double-shaft moving component, and the metal powder after scraping is compacted, reduce the gap between metal powder, effectively improve the density of metal powder.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal powder processing, more particularly to a metal powder powder laying mechanism and a 3D printing device. BACKGROUND

[0002] 3D printing technology, as a highly innovative additive manufacturing technology, has been widely used in many fields in recent years. From the high-precision manufacturing of complex parts in the aerospace field, to the rapid production of personalized parts in the automotive industry, to the manufacturing of customized implants in the biomedical field, 3D printing technology is reshaping the traditional manufacturing industry with its ability to process complex-shaped parts, significantly shorten the manufacturing cycle, improve material utilization, and ensure part precision. In the process of 3D metal printing, the powder laying link of metal powder is crucial, and its quality directly affects the performance and precision of the final printed parts.

[0003] In the fields of aerospace, high-end manufacturing, etc., many key parts need to combine the characteristics of different metals, such as high strength and corrosion resistance, thermal conductivity and insulation. The traditional 3D printing device has low functionality and is difficult to achieve single-layer multi-metal powder laying. In view of this, we propose a metal powder powder laying mechanism and a 3D printing device. SUMMARY

[0004] The purpose of the present application is to provide a metal powder powder laying mechanism and a 3D printing device to solve the technical problem of low functionality of traditional 3D printing devices and difficulty in achieving single-layer multi-metal powder laying.

[0005] To solve the above technical problems, the present application provides the following technical scheme: a metal powder powder laying mechanism, a metal powder powder laying mechanism, comprising a double-shaft moving assembly, the movable end of the double-shaft moving assembly is fixed with an L-shaped seat, the L-shaped seat is provided with a driving assembly, and the movable end of the driving assembly is provided with a powder laying assembly.

[0006] The powder laying assembly comprises a convex column and a powder laying unit; the convex column is internally provided with a circular material cavity and a ring material cavity in an inner and outer structure, the bottom end of the convex column is provided with a semicircular groove, the bottom end of the circular material cavity is provided with a discharging groove A in communication with the semicircular groove, and the two sides of the bottom end of the circular material cavity are both provided with a discharging groove B in communication with the semicircular groove; the powder laying unit comprises a semicircular column, the semicircular column is rotatably arranged on the semicircular groove, the middle part of the semicircular column is provided with a pre-storage groove A, and the two sides of the discharging groove A are both provided with a pre-storage groove B; when the semicircular column is rotated to an inclined state, the pre-storage groove A and the pre-storage groove B are both in communication with the outside world, the semicircular column and the convex column form a scraping flat mode; when the semicircular column is rotated to a horizontal state, the bottom surface of the semicircular column is flush with the bottom surface of the convex column, the discharging groove A and the discharging groove B are respectively in communication with the pre-storage groove A and the pre-storage groove B, and the semicircular column and the convex column form a compaction mode. The circular material cavity and the ring material cavity in the convex column are separately designed, different metal powders can be respectively stored, when the semicircular column is rotated to an inclined state, the pre-storage groove A and the pre-storage groove B are both in communication with the outside world, the semicircular column and the convex column form a scraping flat mode, the driving assembly is driven to rotate, the synchronous laying of multiple metal powders in a single layer is completed, the demand of multiple material composite performance of complex parts is met, when the semicircular column is rotated to a horizontal state, the bottom surface of the semicircular column is flush with the bottom surface of the convex column, the semicircular column and the convex column form a compaction mode, the convex column and the semicircular column are driven to descend by the double-shaft moving assembly, the metal powder scraped flat is compacted, the gap between the metal powders is reduced, the metal powder density is effectively improved, and the technical problems that the traditional 3D printing device has low functionality and is difficult to realize the laying of multiple metal powders in a single layer are solved.

[0007] Preferably, one side of the vertical part of the L-shaped seat is provided with a rocking arc groove, and the bottom end of the horizontal part of the L-shaped seat is provided with a rotating groove.

[0008] Preferably, the driving assembly comprises a motor A, a connecting shaft, a mounting block and a rocking unit; the motor A is fixedly arranged at the top end of the horizontal part of the L-shaped seat, the connecting shaft is rotatably arranged on the horizontal part of the L-shaped seat and fixedly connected with the output shaft of the motor A, the bottom end of the connecting shaft penetrates through the bottom end of the horizontal part of the L-shaped seat and is fixedly provided with a circular block, an eccentric position at the bottom end of the circular block is provided with a movable groove, the mounting block is rotatably arranged on the circular block, the bottom end of the mounting block is provided with a mounting cavity, the rocking unit is arranged in the mounting cavity, the top end of the rocking unit is movably connected with the movable groove, the connecting shaft is connected with the rotating groove through a rotating unit, and the bottom end of the rotating unit is fixedly connected with the bottom end of the mounting block; when the connecting shaft rotates forward, the connecting shaft drives the mounting block to rotate through the rotating unit, and the rocking unit rotates accordingly; when the connecting shaft rotates reversely, the rotating unit cannot rotate, the circular block rotates relative to the rocking unit, and the rocking unit rocks.

[0009] Preferably, the shaking unit comprises a rotating rod A fixedly arranged at the bottom end of the mounting cavity, a U-shaped seat rotatably arranged on the rotating rod A, a rotating rod B fixedly arranged at the top end of the U-shaped seat, a sleeve ring movably arranged on the rotating rod B, and a movable column rotatably arranged at the top end of the sleeve ring and movably connected with the movable groove.

[0010] Preferably, the rotating unit comprises a ring block rotatably arranged on the connecting shaft and movably connected with the rotating groove, a plurality of triangular grooves A uniformly arranged on the inner edge surface of the ring block and gradually decreasing in depth along the clockwise direction, a limiting column A movably arranged on the triangular groove A and movably connected with the surface of the connecting shaft, the limiting column A being elastically connected with the deep part of the triangular groove A through a spring A, a plurality of triangular grooves B uniformly arranged on the outer edge surface of the ring block and gradually decreasing in depth along the clockwise direction, and a limiting column B movably arranged on the triangular groove B and movably connected with the surface of the rotating groove, the limiting column B being elastically connected with the deep part of the triangular groove B through a spring B.

[0011] Preferably, the convex column is fixedly arranged at the bottom end of the U-shaped seat, a material hole A and a material hole B are arranged at the top end of the convex column, the material hole A and the material hole B are respectively connected with the circular material cavity and the annular material cavity, rotating arc grooves are arranged at both ends of the semicircular groove, rotating arc blocks movably connected with the rotating arc grooves are fixedly arranged at both ends of the semicircular column, an arc missing groove is further arranged at one end of the semicircular groove, a rotating cavity is connected at the top end of the arc missing groove, and a mounting groove is arranged at the bottom of the outer edge surface of the convex column.

[0012] Preferably, an annular groove is arranged at the middle part of the outer edge surface of the convex column, a rotating ring is rotatably connected with the annular groove, a connecting block is fixedly arranged on the rotating ring, and a shaking arc block movably connected with the shaking arc groove is fixedly arranged on the connecting block.

[0013] Preferably, the groove volumes of the pre-storage material grooves A and B gradually increase along the eccentric direction.

[0014] Preferably, the powder paving unit further comprises a partial tooth ring, a gear and a motor B, the partial tooth ring is arranged in the arc missing groove and fixedly connected with the semicircular column, the gear is arranged in the rotating cavity and meshingly connected with the partial tooth ring, a rotating rod rotatably connected with the rotating cavity is fixedly arranged on the gear, the motor B is fixedly arranged on the mounting groove, the rotating rod penetrates into the mounting groove and is fixedly connected with the output shaft of the motor B.

[0015] The 3D printing device comprises the metal powder paving mechanism.

[0016] The 3D printing device comprises the metal powder paving mechanism.

[0017] 1. The application separates the round material cavity and the ring material cavity in the convex column, and can store different metal powders. When the semi-circular column is rotated to an inclined state, the pre-storage groove A and the pre-storage groove B are connected with the outside world, the semi-circular column and the convex column form a scraping shape, and the driving assembly is driven to rotate to complete the synchronous laying of single-layer multiple metal powders, meet the demand of complex parts for multiple material composite performance, and when the semi-circular column is rotated to a horizontal state, the bottom surface of the semi-circular column is flush with the bottom surface of the convex column, the semi-circular column and the convex column form a compaction shape, the biaxial moving assembly drives the convex column and the semi-circular column to descend, and the metal powder after scraping is compacted, the gap between the metal powders is reduced, the density of the metal powder is effectively improved, and the technical problems of low functionality of the traditional 3D printing device and difficult to realize the laying of single-layer multiple metal powders are solved.

[0018] 2. The application also designs the overall volume gradient design of the discharge groove A and the discharge groove B, so that the peripheral area corresponds to a larger discharge volume, and the central area corresponds to a smaller discharge volume, so that the metal powder after scraping is relatively uniform.

[0019] 3. The application also designs the structure of the driving assembly and the powder laying assembly, so that the powder laying assembly has two motion states of shaking the material and rotating the scraping, and the "pre-storage-powder laying-scraping-compaction" process can be completed without additional equipment, the process time is shortened, the processing efficiency is improved, the shaking action of the powder laying assembly makes the pre-storage amount of the metal powder in the pre-storage groove A and the pre-storage groove B relatively accurate, the functionality of the 3D printing device is improved, and the uniformity of the metal powder after subsequent scraping is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall structure schematic diagram of the application.

[0021] Figure 2 It is the overall structure cross-sectional schematic diagram of the application.

[0022] Figure 3 It is the A part structure enlarged schematic diagram of Figure 2 .

[0023] Figure 4 It is the structure schematic diagram of the metal powder laying mechanism of the application.

[0024] Figure 5 It is the structure schematic diagram of the L-shaped seat, the driving assembly and the powder laying assembly of the application.

[0025] Figure 6 It is the split structure schematic diagram of the powder laying assembly of the application.

[0026] Figure 7 It is the cross-sectional structure schematic diagram of the convex column of the application.

[0027] Figure 8 Structure diagram of powder spreading unit of the present application.

[0028] Figure 9 Structure diagram of B part of the present application. Figure 8

[0029] Figure 10 Structure diagram of L type seat, driving assembly and powder spreading assembly of the present application.

[0030] Figure 11 Structure diagram of driving assembly of the present application.

[0031] Figure 12 Structure diagram of driving assembly of the present application.

[0032] Figure 13 Structure diagram of rotating unit of the present application.

[0033] Explanation of figure mark:

[0034] 1, double shaft moving assembly; 2, L type seat; 3, driving assembly; 4, powder spreading assembly; 5, printer body; 6, lifting mechanism;

[0035] 11, X axis moving unit; 12, Y axis moving unit;

[0036] 21, shaking arc groove; 22, rotating groove;

[0037] 31, motor A; 32, connecting shaft; 33, round block; 34, mounting block; 35, shaking unit; 36, rotating unit;

[0038] 331, movable groove;

[0039] 341, mounting cavity;

[0040] 351, rotating rod A; 352, U type seat; 353, rotating rod B; 354, sleeve ring; 355, movable column;

[0041] 361, ring block; 362, triangular groove A; 363, limiting column A; 364, spring A; 365, triangular groove B; 366, limiting column B; 367, spring B;

[0042] 41, convex column; 42, ring groove; 43, rotating ring; 44, connecting block; 45, shaking arc block; 46, powder spreading unit;

[0043] 410, round material cavity; 411, ring material cavity; 412, semicircular groove; 413, arc missing groove; 414, rotating cavity; 415, mounting groove; 416, discharging groove A; 417, discharging groove B; 418, rotating arc groove; ​

[0044] 461, semi-cylinder; 462, pre-stored material groove A; 463, pre-stored material groove B; 464, rotating arc block; 465, partial tooth ring; 466, gear; 467, motor B;

[0045] 50, printing table; 51, cylindrical groove; 52, empty groove A; 53, sliding groove; 54, motor groove;

[0046] 61, motor C; 62, screw rod A; 64, sliding rod; 63, threaded tube. DETAILED DESCRIPTION

[0047] As shown in Figures 1 to 13 , the metal powder paving mechanism of the present application comprises a double-shaft moving assembly 1, an L-shaped seat 2, a driving assembly 3 and a paving assembly 4.

[0048] In the embodiment of the present application, referring to Figure 4 , the double-shaft moving assembly 1 comprises an X-axis moving unit 11, and the X-axis moving unit 11 is fixedly provided with a Y-axis moving unit 12 at the movable end. The X-axis moving unit 11 and the Y-axis moving unit 12 of the present application are both of the screw rod moving structure, which is a prior art and will not be described here.

[0049] In the embodiment of the present application, referring to Figure 10 , the L-shaped seat 2 is fixedly provided at the movable end of the Y-axis moving unit 12, and the L-shaped seat 2 is provided with a swinging arc groove 21 at one side of the vertical part and a rotating groove 22 at the bottom end of the horizontal part.

[0050] In the embodiment of the present application, referring to Figure 10 , Figure 11 , Figure 12 and Figure 13 , the driving assembly 3 comprises a motor A 31, a connecting shaft 32, a mounting block 34 and a swinging unit 35.

[0051] In the embodiment of the present application, the motor A31 is fixed on the top end of the horizontal part of the L-shaped seat 2, the connecting shaft 32 is rotatably arranged on the horizontal part of the L-shaped seat 2 and fixedly connected with the output shaft of the motor A31, the bottom end of the connecting shaft 32 penetrates through the bottom end of the horizontal part of the L-shaped seat 2 and is fixed with a circular block 33, the eccentric position of the bottom end of the circular block 33 is provided with a movable slot 331, the mounting block 34 is rotatably arranged on the circular block 33, the bottom end of the mounting block 34 is provided with a mounting cavity 341, the shaking unit 35 is arranged in the mounting cavity 341, the top end of the shaking unit 35 is movably connected with the movable slot 331, the connecting shaft 32 is connected with the rotating slot 22 through the rotating unit 36, the bottom end of the rotating unit 36 is fixedly connected with the bottom end of the mounting block 34, so that when the connecting shaft 32 rotates forward, the connecting shaft 32 drives the mounting block 34 to rotate through the rotating unit 36, and the shaking unit 35 rotates accordingly, and when the connecting shaft 32 rotates reversely, the rotating unit 36 cannot rotate, the circular block 33 rotates relative to the shaking unit 35, so that the shaking unit 35 shakes.

[0052] In the embodiment of the present application, the shaking unit 35 comprises a rotating rod A351, the rotating rod A351 is fixed on the bottom end of the mounting cavity 341, a U-shaped seat 352 is rotatably arranged on the rotating rod A351, a rotating rod B353 is fixed on the top end of the U-shaped seat 352, a sleeve ring 354 is movably arranged on the rotating rod B353, a movable column 355 is rotatably arranged on the top end of the sleeve ring 354, and the movable column 355 is movably connected with the movable slot 331. Through the structural arrangement of the shaking unit 35, in the initial position, the U-shaped seat 352 is in a vertical state, when the circular block 33 rotates relative to the shaking unit 35, the movable slot 331 rotates, so that the movable column 355 moves relative to the movable slot 331, the sleeve ring 354 moves relative to the rotating rod B353, and the U-shaped seat 352 reciprocatingly rotates relative to the rotating rod A351 to form a shaking action.

[0053] In the embodiment of the present application, the rotating unit 36 comprises a ring block 361, which is rotatably arranged on the connecting shaft 32 and rotatably connected with the rotating groove 22. A plurality of triangular grooves A 362 are uniformly arranged on the inner edge surface of the ring block 361, and the groove depth of the triangular grooves A 362 gradually decreases in the clockwise direction. A limiting column A 363 is movably arranged on the triangular grooves A 362 and movably connected with the surface of the connecting shaft 32. The limiting column A 363 is elastically connected with the deep part of the triangular grooves A 362 through a spring A 364. A plurality of triangular grooves B 365 are uniformly arranged on the outer edge surface of the ring block 361, and the groove depth of the triangular grooves B 365 gradually decreases in the clockwise direction. A limiting column B 366 is movably arranged on the triangular grooves B 365 and movably connected with the surface of the rotating groove 22. The limiting column B 366 is elastically connected with the deep part of the triangular grooves B 365 through a spring B 367. Through the structural design of the rotating unit 36, when the connecting shaft 32 rotates in the forward direction, the friction between the connecting shaft 32 and the limiting column A 363 causes the limiting column A 363 to move towards the shallow part of the triangular grooves A 362, so that the connecting shaft 32 is locked by the limiting column A 363 and the triangular grooves A 362, thereby causing the connecting shaft 32 to drive the ring block 361 to rotate in the forward direction. The friction between the rotating groove 22 and the limiting column B 366 causes the limiting column B 366 to move towards the deep part of the triangular grooves B 365, so that the ring block 361 drives the mounting block 34 and the entire shaking unit 35 to rotate. As can be known from the above principle, the ring block 361 cannot rotate in the reverse direction relative to the rotating groove 22, and the connecting shaft 32 can rotate in the reverse direction relative to the ring block 361. When the connecting shaft 32 rotates in the reverse direction, the circular block 33 rotates relative to the shaking unit 35, so that the shaking unit 35 shakes.

[0054] In the embodiment of the present application, as shown in Figure 6 、 Figure 7 、 Figure 8 and Figure 9 , the powder laying assembly 4 comprises a convex column 41 and a powder laying unit 46.

[0055] In the embodiment of the present application, the convex column 41 is fixedly arranged at the bottom end of the U-shaped seat 352. The convex column 41 is internally and externally structured to have a circular material cavity 410 and a ring material cavity 411. The convex column 41 is provided with a material hole A and a material hole B at the top end. The material hole A and the material hole B are respectively connected with the circular material cavity 410 and the ring material cavity 411. The convex column 41 is provided with a semicircular groove 412 at the bottom end. The circular material cavity 410 is provided with an outlet groove A 416 at the bottom end, which is connected with the semicircular groove 412. The circular material cavity 410 is provided with two outlet grooves B 417 at the bottom end, which are connected with the semicircular groove 412. The outlet groove A 416 and the two outlet grooves B 417 are in the same straight line. The semicircular groove 412 is provided with a rotating arc groove 418 at both ends. The convex column 41 is further provided with an arc missing groove 413 at one side end. The arc missing groove 413 is connected with a rotating cavity 414 at the top end. The convex column 41 is provided with a mounting groove 415 at the bottom of the outer edge surface. The circular material cavity 410 and the ring material cavity 411 of the present application are used to place the same or different metal powders.

[0056] In the embodiment of the present application, in order to improve the stability of the convex column 41, a ring groove 42 is formed in the middle of the outer edge surface of the convex column 41, a rotating ring 43 is rotatably connected to the ring groove 42, a connecting block 44 is fixedly arranged on the rotating ring 43, and a rocking arc block 45 is movably connected to the connecting block 44. When the convex column 41 rotates, the convex column 41 rotates relative to the rotating ring 43, and when the convex column 41 rocks, the rotating ring 43, the connecting block 44 and the rocking arc block 45 are driven to reciprocally move relative to the rocking arc groove 21.

[0057] In the embodiment of the present application, the powder laying unit 46 comprises a semi-cylindrical column 461, a partial tooth ring 465, a gear wheel 466 and a motor B 467. The semi-cylindrical column 461 is rotatably arranged in the semi-circular groove 412, a pre-storage groove A 462 is formed in the middle of the semi-cylindrical column 461 and is in communication with the discharge groove A 416, pre-storage grooves B 463 are formed on both sides of the discharge groove A 416 and are in communication with the discharge groove B 417, rotating arc blocks 464 are fixedly arranged at both ends of the semi-cylindrical column 461 and are movably connected to the rotating arc groove 418, the partial tooth ring 465 is arranged in the arc-lacking groove 413 and is fixedly connected to the semi-cylindrical column 461, the gear wheel 466 is arranged in the rotating cavity 414 and is meshingly connected to the partial tooth ring 465, a rotating rod is fixedly arranged on the gear wheel 466 and is rotatably connected to the rotating cavity 414, and the motor B 467 is fixedly arranged on the mounting groove 415. The rotating rod penetrates into the mounting groove 415 and is fixedly connected to the output shaft of the motor B 467. Through the above arrangement, the output shaft of the motor B 467 drives the gear wheel 466 to rotate, the partial tooth ring 465 drives the semi-cylindrical column 461 to rotate, as shown in the figure, when the semi-cylindrical column 461 rotates to an inclined state, the pre-storage groove A 462 and the pre-storage groove B 463 are in communication with the outside, the semi-cylindrical column 461 and the convex column 41 form a scraping state, the metal powder falls from the pre-storage groove A 462 and the pre-storage groove B 463, the rotating movement state of the driving assembly 3 drives the convex column 41 to rotate, and the metal powder is scraped flat, when the semi-cylindrical column 461 rotates to a horizontal state, the bottom surface of the semi-cylindrical column 461 is flush with the bottom surface of the convex column 41, the discharge groove A 416 and the discharge groove B 417 are in communication with the pre-storage groove A 462 and the pre-storage groove B 463 respectively, the semi-cylindrical column 461 and the convex column 41 form a compacting state, the driving assembly 3 and the convex column 41 are driven downward by the Y-axis moving unit 12, the scraped metal powder is compacted, the gap between the metal powders is reduced, the density of the metal powder is effectively improved, and the mechanical strength of the formed workpiece is improved, when the circular material cavity 410 and the ring material cavity 411 are used to place the same or different metal powders, the single-layer multiple metal powder is laid flat. Figure 6

[0058] In the embodiment of the present application, as shown in the figure, the driving assembly 3 comprises a driving motor 431, a driving gear 432, a driven gear 433, a driving shaft 434 and a driven shaft 435. The driving motor 431 is fixedly arranged on the mounting groove 415, the driving gear 432 is fixedly arranged on the driving motor 431 and is meshingly connected to the driven gear 433, the driving shaft 434 is rotatably arranged on the driving gear 432 and is rotatably connected to the driven shaft 435, and the driven shaft 435 is rotatably connected to the convex column 41. Figure 8 ​As shown, the volume of the pre-storage tank A 462 and the pre-storage tank B 463 gradually increases along the eccentric direction. The present application designs the volume gradient of the discharge tank A 416 and the discharge tank B 417, so that the outer area corresponds to a larger discharge volume, and the central area corresponds to a smaller discharge volume, so that the metal powder is relatively uniform after scraping.

[0059] In the embodiment of the present application, as shown in Figure 2 As shown, a 3D printing device comprises the above-mentioned metal powder spreading mechanism, and further comprises a printer body 5, the printer body 5 is provided with a cylindrical groove 51 matched with the bottom of the convex column 41, the cylindrical groove 51 is slidably provided with a printing table 50, and the printer body 5 is provided with a lifting mechanism 6 for driving the printing table 50 to lift.

[0060] In the embodiment of the present application, as shown in Figure 3 As shown, the bottom end of the cylindrical groove 51 is provided with an empty groove A 52, a plurality of sliding grooves 53 are uniformly arranged on the side of the empty groove A 52, and a motor groove 54 is arranged below the empty groove A 52.

[0061] The lifting mechanism 6 comprises a motor C61, a lead screw A62 and a plurality of sliding rods 64, the motor C61 is fixedly arranged on the motor groove 54, the lead screw A62 is rotatably arranged on the empty groove A 52, a threaded tube 63 is threadedly connected to the lead screw A62, the top end of the threaded tube 63 is fixedly connected to the bottom end of the printing table 50, the sliding rods 64 are fixedly arranged on the bottom end of the printing table 50, and the plurality of sliding rods 64 are slidably connected to the plurality of sliding grooves 53.

[0062] Working principle: the embodiment provides a metal powder spreading mechanism and a 3D printing device, in use, the X-axis moving unit 11 and the Y-axis moving unit 12 of the double-shaft moving assembly 1 drive the L-shaped seat 2 and the subsequent components to realize precise displacement in X and Y directions on the horizontal plane;

[0063] By controlling the motor A31 to control the reverse rotation of the connecting shaft 32, the rotating unit 36 cannot drive the ring block 361 to rotate, and the circular block 33 eccentrically rotates relative to the shaking unit 35, through the linkage of the movable groove 331, the movable column 355 and the sleeve ring 354, the U-shaped seat 352 reciprocatingly rotates around the rotating rod A351, the shaking action of the powder spreading assembly 4 is realized, and the pre-storage amount of the metal powder in the pre-storage tank A 462 and the pre-storage tank B 463 is relatively accurate.

[0064] The convex column 41 is moved to the top end of the cylindrical groove 51, the output shaft of the motor B467 is controlled to rotate, the semi-cylindrical column 461 is rotated to an inclined state, the pre-storage tank A 462 and the pre-storage tank B 463 are communicated with the outside, the metal powder in the pre-storage tank A 462 and the pre-storage tank B 463 falls into the cylindrical groove 51, and the semi-cylindrical column 461 and the convex column 41 form a scraping mode;

[0065] By controlling the motor A31 to control the connecting shaft 32 to rotate forward, the limiting column A363 of the rotating unit 36 is locked with the triangular groove A362 of the ring block 361, the ring block 361 is driven to rotate synchronously, the mounting block 34, the shaking unit 35 and the powder laying assembly 4 rotate as a whole, and the semicircular column 461 scrapes the powder flat;

[0066] By controlling the motor B467 output shaft to rotate, when the semicircular column 461 rotates to the horizontal state, the bottom surface is flush with the bottom surface of the convex column 41, the discharge groove A416 and the discharge groove B417 are respectively communicated with the pre-storage groove A462 and the pre-storage groove B463, the semicircular column 461 and the convex column 41 form a compacted shape, the driving assembly 3 and the convex column 41 are driven to descend by the Y-axis moving unit 12, the scraped metal powder is compacted, the metal powder gap is reduced, and the metal powder density is effectively improved,

[0067] The powder laying assembly 4 is restored to the initial position, the shaking action of the powder laying assembly 4 is repeated, and the printer body 5 prints the compacted metal powder;

[0068] The above steps are repeated, and the printing and forming of the metal powder are completed.

[0069] The embodiments of the present application are disclosed, but the present application is not limited to this, and the ordinary skilled in the art can easily understand the spirit of the present application according to the above embodiments, and make different inferences and changes, as long as they do not deviate from the spirit of the present application, they are within the protection scope of the present application.

Claims

1. A metal powder spreading mechanism, characterized in that: It comprises a biaxial moving assembly (1), wherein an L-shaped seat (2) is fixedly provided at a movable end of the biaxial moving assembly (1), a driving assembly (3) is provided on the L-shaped seat (2), and a powder spreading assembly (4) is provided at a movable end of the driving assembly (3); The powder spreading component (4) includes a convex column (41) and a powder spreading unit (46); The convex column (41) has an inner and outer structure with a circular material cavity (410) and an annular material cavity (411). The bottom end of the convex column (41) is provided with a semicircular groove (412). The bottom end of the circular material cavity (410) is provided with a discharge groove A (416) communicating with the semicircular groove (412). Discharge grooves B (417) communicating with the semicircular groove (412) are provided on both sides of the bottom end of the circular material cavity (410). The powder spreading unit (46) includes a semi-cylinder (461) rotatably mounted on the semi-circular groove (412), a pre-storage groove A (462) is provided in the middle of the semi-cylinder (461), and pre-storage grooves B (463) are provided on both sides of the discharge groove A (416); When the semi-cylinder (461) rotates to an inclined state, the pre-storage trough A (462) and the pre-storage trough B (463) are both connected to the outside world, and the semi-cylinder (461) and the convex column (41) form a scraping shape; When the semi-cylinder (461) rotates to a horizontal state, the bottom surface of the semi-cylinder (461) is flush with the bottom surface of the convex column (41), the discharge trough A (416) and the discharge trough B (417) are connected to the pre-storage trough A (462) and the pre-storage trough B (463) respectively, and the semi-cylinder (461) and the convex column (41) form a compacted shape.

2. The metal powder spreading mechanism according to claim 1, characterized in that: A shaking arc groove (21) is provided on one side of the vertical portion of the L-shaped seat (2), and a rotating groove (22) is provided on the bottom end of the horizontal portion of the L-shaped seat (2).

3. The metal powder spreading mechanism according to claim 2, characterized in that: The driving assembly (3) includes a motor A (31), a connecting shaft (32), a mounting block (34) and a shaking unit (35); The motor A (31) is fixedly mounted on the top of the transverse portion of the L-shaped seat (2); the connecting shaft (32) is rotatably mounted on the transverse portion of the L-shaped seat (2) and is fixedly connected to the output shaft of the motor A (31); the bottom end of the connecting shaft (32) passes through the bottom end of the transverse portion of the L-shaped seat (2) and is fixedly provided with a round block (33); a movable groove (331) is provided at an eccentric position at the bottom end of the round block (33); the mounting block (34) is rotatably mounted on the round block (33); a mounting cavity (341) is provided at the bottom end of the mounting block (34); the shaking unit (35) is disposed in the mounting cavity (341); the top end of the shaking unit (35) is movably connected to the movable groove (331); the connecting shaft (32) is connected to the rotating groove (22) via a rotating unit (36); the bottom end of the rotating unit (36) is fixedly connected to the bottom end of the mounting block (34); When the connecting shaft (32) rotates in the forward direction, the connecting shaft (32) drives the mounting block (34) to rotate through the rotating unit (36), and the shaking unit (35) rotates accordingly. When the connecting shaft (32) rotates in the reverse direction, the rotating unit (36) cannot rotate, and the round block (33) rotates relative to the shaking unit (35), causing the shaking unit (35) to shake.

4. The metal powder spreading mechanism according to claim 3, characterized in that: The shaking unit (35) includes a rotating rod A (351), the rotating rod A (351) is fixedly arranged at the bottom end of the installation cavity (341), a U-shaped seat (352) is rotatably provided on the rotating rod A (351), a rotating rod B (353) is fixedly provided at the top end of the U-shaped seat (352), a collar (354) is movably provided on the rotating rod B (353), a movable column (355) is rotatably provided at the top end of the collar (354), and the movable column (355) is movably connected to the movable groove (331).

5. The metal powder spreading mechanism according to claim 3, characterized in that: The rotating unit (36) includes a ring block (361), the ring block (361) is rotatably arranged on the connecting shaft (32) and is rotatably connected to the rotating groove (22), a plurality of triangular grooves A (362) are evenly opened on the inner edge surface of the ring block (361), the groove depth of the triangular grooves A (362) gradually decreases in the clockwise direction, and a limiting column A (363) movably arranged on the triangular groove A (362) and movably connected to the surface of the connecting shaft (32), the limiting column A (363) The ring block (361) is elastically connected to the deep part of the triangular groove A (362) through a spring A (364). A plurality of triangular grooves B (365) are evenly formed on the outer edge surface of the ring block (361). The depth of the triangular groove B (365) gradually decreases in the clockwise direction. A limiting column B (366) is movably provided on the triangular groove B (365) and is movably connected to the surface of the rotating groove (22). The limiting column B (366) is elastically connected to the deep part of the triangular groove B (365) through a spring B (367).

6. The metal powder spreading mechanism according to claim 4, characterized in that: The convex column (41) is fixed at the bottom end of the U-shaped seat (352), and a material hole A and a material hole B are provided at the top end of the convex column (41), and the material hole A and the material hole B are respectively connected to the circular material cavity (410) and the annular material cavity (411), and a rotating arc groove (418) is provided at both ends of the semicircular groove (412), and a rotating arc block (464) movably connected to the rotating arc groove (418) is fixed at both ends of the semicircular column (461), and an arc notch groove (413) is further provided at one end of the semicircular groove (412), and the top end of the arc notch groove (413) is connected to the rotating cavity (414), and a mounting groove (415) is provided at the bottom of the outer edge surface of the convex column (41).

7. The metal powder spreading mechanism according to claim 2, characterized in that: An annular groove (42) is provided in the middle of the outer edge surface of the convex column (41), a rotating ring (43) is rotatably connected to the annular groove (42), a connecting block (44) is fixedly provided on the rotating ring (43), and a shaking arc block (45) movably connected to the shaking arc groove (21) is fixedly provided on the connecting block (44).

8. The metal powder spreading mechanism according to claim 6, characterized in that: The volume of the pre-storage tank A (462) and the pre-storage tank B (463) both gradually increases along the eccentric direction.

9. The metal powder spreading mechanism according to claim 6, characterized in that: The powder spreading unit (46) further includes a partial toothed ring (465), a gear (466) and a motor B (467), wherein the partial toothed ring (465) is arranged in the arc notch (413) and is fixedly connected to the semi-cylinder (461), the gear (466) is arranged in the rotating chamber (414) and is meshedly connected to the partial toothed ring (465), the gear (466) is fixedly provided with a rotating rod rotatably connected to the rotating chamber (414), the motor B (467) is fixedly arranged on the mounting groove (415), the rotating rod penetrates the mounting groove (415) and is fixedly connected to the output shaft of the motor B (467).

10. A 3D printing device, characterized in that: It comprises the metal powder spreading mechanism as described in any one of claims 1-9.

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