CN113351886A

CN113351886A - SLM device capable of avoiding holes and using method thereof

Info

Publication number: CN113351886A
Application number: CN202110725496.9A
Authority: CN
Inventors: 祝勇仁; 毛德锋; 范有; 赵庆洋; 韦应千; 侯森
Original assignee: Hangzhou Himalaya Information Technology Co ltd
Current assignee: Hangzhou Himalaya Information Technology Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2021-09-07

Abstract

The utility model provides a avoid SLM equipment that hole produced, comprises a workbench, workstation upper end fixedly connected with fixed plate, fixed plate upper end sliding connection has the shrouding, the first ejector pad of shrouding front end fixedly connected with, the first cylinder of first ejector pad right-hand member fixedly connected with, first cylinder fixed connection is on the fixed plate, shrouding left end fixedly connected with send the powder pipe, send powder pipe lower extreme to open there is the annular of sliding, sliding connection has the sliding ring in the annular of sliding, sliding ring outside fixedly connected with spacing ring, the annular outside of sliding is equipped with the positioning ring groove of opening on sending the powder pipe, spacing ring sliding connection is in spacing annular, sliding ring lower extreme fixedly connected with sieve tray, sieve tray outside fixedly connected with gear, the meshing of gear rear end has the rack, rack upper end fixedly connected with second slider, shrouding rear end fixedly connected with backup pad, the backup pad lower extreme is opened has the second spout, second slider sliding connection is in the second spout.

Description

SLM device capable of avoiding holes and using method thereof

Technical Field

The invention relates to the field of SLM (Selective laser melting) equipment, in particular to SLM equipment capable of avoiding holes.

Background

SLM (Selective laser melting) is a main technical approach in metal material additive manufacturing. The technology selects laser as an energy source, scans layer by layer on a metal powder bed layer according to a planned path in a three-dimensional CAD slicing model, achieves the effect of metallurgical bonding by melting and solidifying the scanned metal powder, and finally obtains the metal part designed by the model. The type of 3D printer comprises a powder feeding cylinder, a powder collecting cylinder and a working platform in a main working area of the printer. The metal powder is loaded in the powder feeding cylinder, after one layer is printed, the powder feeding cylinder is lifted upwards by more than one layer thickness, the working platform is lowered by one layer thickness, and then the scraper scrapes the metal powder which is raised out to the working platform and the powder collecting cylinder. However, when the metal powder is scraped by the doctor blade, holes are easily generated, so that the printed parts also have holes inside, and the printing result is affected.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides SLM equipment capable of avoiding holes, which can screen metal powder on a printing circular table, is not easy to generate holes and has a simple structure.

The invention adopts the technical scheme for solving the technical problems that: the SLM equipment for avoiding the generation of the holes comprises a base plate, a supporting frame fixedly connected to the upper end of the base plate, and a workbench fixedly connected to the upper end of the supporting frame, wherein a fixed plate is fixedly connected to the upper end of the workbench, a first chute is formed in the upper end of the fixed plate, the first chute is slidably connected to a first sliding block, a sealing plate is fixedly connected to the upper end of the first sliding block, a first pushing block is fixedly connected to the front end of the sealing plate, a first air cylinder is fixedly connected to the right end of the first pushing block, the first air cylinder is fixedly connected to the fixed plate, a powder feeding pipe is fixedly connected to the left end of the sealing plate, a powder feeding barrel is mounted above the powder feeding pipe, a powder outlet pipe is fixedly connected to the lower end of the powder feeding barrel, a powder inlet pipe is fixedly connected to the upper end of the powder feeding barrel, a sealing cover is mounted to the upper end of the powder inlet pipe, a supporting frame is fixedly connected to the outer side of the powder feeding barrel, a sliding ring groove is formed in the lower end of the powder feeding pipe, a sliding ring groove is slidably connected to the sliding ring, a limiting ring is fixedly connected to the outer side of the sliding ring groove, a positioning ring groove formed in the powder feeding pipe is arranged on the outer side of the sliding ring groove, the limiting ring is connected in the limiting ring groove in a sliding mode, a screen disc is fixedly connected to the lower end of the sliding ring, a gear is fixedly connected to the outer side of the screen disc, a rack is meshed to the rear end of the gear, a second sliding block is fixedly connected to the upper end of the rack, a supporting plate is fixedly connected to the rear end of the sealing plate, a second sliding groove is formed in the lower end of the supporting plate and is connected in the second sliding groove in a sliding mode, a second sliding block is connected in the second sliding groove in a sliding mode, a second pushing block is fixedly connected to the upper end of the second sliding block, a second air cylinder is fixedly connected to the rear end of the supporting plate, and a leakage-proof plate fixedly connected to the upper end of the workbench is arranged at the lower end of the screen disc, the left side of the leakage-proof plate is provided with a through hole arranged on the workbench, the through hole is internally and slidably connected with a mounting plate, the lower end of the mounting plate is fixedly connected with a fourth air cylinder, the fourth air cylinder is fixedly connected at the upper end of the substrate, the left side and the right side of the upper end of the mounting plate are fixedly connected with positioning columns, the upper end of the mounting plate is provided with a printing round platform, the left side and the right side of the lower end of the printing round platform are provided with positioning holes, the positioning columns are arranged in the positioning holes, the rear end of the through hole is provided with a fifth air cylinder fixedly connected at the upper end of the workbench, the front end of the fifth air cylinder is fixedly connected with a scraper, the front end of the through hole is provided with a powder leakage groove arranged on the workbench, an inclined plate fixedly connected to the inner side of the supporting frame is arranged below the powder leakage groove, the lower side of the right end of the inclined plate is provided with a waste bin, the first air cylinder can convey a powder conveying pipe to the upper end of the printing round platform, the second air cylinder can drive a rack to move, the rack drives a gear to rotate so as to screen the powder in the powder conveying pipe to the upper end of the printing round platform, avoid metal powder to produce the hole and influence printing quality.

In order to further improve the structure, a sliding ring fixedly connected to the upper end of the sieve tray is arranged on the outer side of the powder feeding pipe, a support ring is fixedly connected to the upper end of the outer side of the sliding ring, a plurality of convex blocks are fixedly connected to the upper end of the support ring and are uniformly distributed on the support ring at equal intervals, a fixing ring fixedly connected to the outer side of the powder feeding pipe is arranged on the upper end of the convex blocks, a groove is formed in the lower end of the fixing ring and is uniformly distributed at equal intervals, a rotating rod is rotatably connected to the groove, stop blocks fixedly connected to the fixing ring are arranged on two sides of the rotating rod, a connecting ring is fixedly connected to the outer side of the lower end of the fixing ring, a bottom ring is fixedly connected to the upper end of the bottom ring, a moving ring is fixedly connected to the upper end of the first spring and is, the bull stick pushes down the lug, and the spring compression, when the bull stick was kept away from to the ejector pad, the spring kick-backed produced the vibration for sieve tray powder feeding efficiency is high, and is difficult for blockking up.

Further perfect, send the inboard fixedly connected with dead lever in powder pipe upper end, dead lever lower extreme fixedly connected with screw rod, the screw rod outside is rotated and is connected with the cylinder, cylinder outside fixedly connected with disc, disc lower extreme fixedly connected with vibrating needle, disc outside fixedly connected with slide bar, the slip ring inboard is opened there is the sliding groove, slide bar sliding connection is in the sliding groove, the sliding ring vibration drives the vibrating needle vibration, the vibrating needle vibration can be with the powder tap, avoid the production of hole for print the quality better.

Further perfect, it has the hole to open on the disc, and the hole has a plurality of and equidistance evenly distributed, avoids the disc to block that the powder gets into the sieve tray upper end.

Further perfect, the through-hole outside is equipped with opens the mounting groove in the workstation upper end, and sliding connection has the fender frame in the mounting groove, keeps off the one end of frame lower extreme fixedly connected with second spring, and the other end fixed connection of second spring avoids the powder to disperse to the fender frame outside, is difficult to the clearance on the workstation.

Further perfection, the upper end of the mounting disc is fixedly connected with a mounting column, the lower end of the mounting column is provided with a mounting cavity, a fixed block is arranged in the mounting cavity, the left end and the right end of the fixed block are rotatably connected with connecting rods, one end of each connecting rod, far away from the fixed block, is rotatably connected with a slide rod, the outer side of the mounting cavity is provided with a communicating groove, the slide rod is slidably connected in the communicating groove, the lower end of the printing round platform is provided with a mounting hole, the mounting column is mounted in the mounting hole, the printing round platform is provided with a fixed groove corresponding to the communicating groove, the lower end of the fixed block is fixedly connected with a third air cylinder, the third air cylinder is fixedly connected to the mounting disc, the lower end of the mounting disc is fixedly connected with a rotating shaft, the outer side of the rotating shaft is rotatably connected with a rotating block, the lower end of the rotating block is fixedly connected to a piston rod of a fourth air cylinder, the front end of the rotating shaft is fixedly connected to a fourth piston rod, and the front end of the rotating shaft is fixedly connected to an output shaft of the motor, the left and right sides of mounting disc all is equipped with the fan of fixed connection at the workstation lower extreme, and the motor can empty the printing round platform through rotating the pivot, can clear up the printing round platform through the fan.

Further perfecting, the collecting box is installed on the left side of the waste material box, and sieve holes formed in the inclined plate are formed in the upper portion of the collecting box, so that falling powder can be screened into the collecting box.

Further perfect, first slider lower extreme fixedly connected with first stopper, first spout lower extreme are equipped with the first spacing groove of opening on the fixed plate, and first stopper sliding connection is at first spacing inslot.

A method for using an SLM device to avoid hole generation includes the following steps:

the method comprises the following steps: starting the first air cylinder, driving the first push plate to move leftwards by the first air cylinder, driving the sealing plate to move leftwards by the first push plate, driving the powder feeding pipe to move leftwards by the sealing plate, moving the powder feeding pipe to the upper end of the printing disc, and simultaneously sealing the powder outlet pipe by the sealing plate to avoid powder leakage;

step two: starting a fourth cylinder, driving the mounting disc to descend by one layer of height by the fourth cylinder, driving the printing circular table to descend by one layer of height by the mounting disc, starting a second cylinder, driving a second push plate to move left and right by the second cylinder, driving a second limiting block to move left and right by the second push plate, driving a second sliding block to move left and right by the second limiting block, driving a rack to slide left and right by the second sliding block, driving a gear to rotate forward and backward by the rack, driving a sieve disc to rotate by the gear, and sieving powder on the sieve disc to the upper end of the printing circular disc;

step three: the sieve plate rotates to drive the sliding ring to rotate, the sliding ring drives the support ring to rotate, the support ring drives the lug to rotate, the lug contacts the rotating rod to drive the rotating rod to rotate, the rotating rod contacts the stop block to stop rotating, the lug continues to rotate to enable the lug to move downwards, the lug moves downwards to drive the support ring to move downwards, the support ring drives the moving ring to move downwards to drive the spring to compress, and when the lug is far away from the rotating rod, the spring rebounds to generate vibration to drive the sieve plate to vibrate, so that the working efficiency of the sieve plate is improved;

step four: the screen disc rotates and vibrates to drive the sliding ring to rotate and vibrate, the sliding ring rotates and vibrates to drive the moving rod to rotate and vibrate, the moving rod rotates and vibrates to drive the disc to rotate and vibrate, the disc rotates and drives the cylinder to rotate, the cylinder rotates and moves up and down through the screw rod, the cylinder moves to drive the disc to move, the disc moves to drive the vibrating needle to move, the vibrating needle moves downwards to the powder on the printing circular table, the powder on the printing circular table is compacted through the vibration of the vibrating needle, and holes are not easy to generate;

step five: after powder feeding is finished, the powder feeding pipe is restored to the original position through the first air cylinder, the fifth air cylinder is started, the fifth air cylinder drives the scraper to move back and forth to push redundant powder into the powder leakage groove, and the laser is used for printing the powder on the printing circular table;

step six: repeating the second step to the fifth step until the printing of the part is finished;

step seven: the fourth cylinder descends the part to the workstation lower extreme, and starter motor, motor drive bull stick rotate, and the bull stick drives the mounting disc and rotates, and the mounting disc drives and prints the round platform and rotate for print the slope of round platform, start the fan and will print the powder that leaves on the round platform and blow down to the swash plate upper end, accomplish the clearance of printing the round platform.

The invention has the beneficial effects that: the invention can sieve metal powder on the printing circular table, holes are not easy to generate, the structure is simple, the first air cylinder can convey the powder feeding pipe to the upper end of the printing circular table, the second air cylinder can drive the rack to move, the rack drives the gear to rotate so as to sieve the powder in the powder feeding pipe to the upper end of the printing circular table, the metal powder is prevented from generating holes to influence the printing quality, the gear rotates to drive the lug to rotate, the rotating rod rotates when the lug contacts with the rotating rod, the rotating rod stops rotating after contacting with the stop block, the rotating rod presses the lug downwards, the spring compresses, the push block moves away from the rotating rod, the spring rebounds to generate vibration, the powder feeding efficiency of the sieve tray is high, the sieve tray is not easy to block, the vibration of the slip ring drives the vibration of the vibration needle, the vibration of the vibration needle can compact the powder, the generation of the holes is avoided, the printing quality is better, and the motor can topp, the printing round table can be cleaned through the fan.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged view taken at A of FIG. 2 according to the present invention;

FIG. 4 is a schematic view of a workbench according to the present invention;

FIG. 5 is a schematic view of a sealing plate according to the present invention;

FIG. 6 is a schematic view of a gear and rack configuration of the present invention;

FIG. 7 is a cross-sectional view of the powder feed tube of the present invention;

FIG. 8 is a cross-sectional view of a turn bar of the present invention;

fig. 9 is a schematic structural view of the mounting plate of the present invention.

Description of reference numerals: 1. a work table; 11. a support frame; 12. a substrate; 13. a through hole; 14. mounting grooves; 15. a powder leakage groove; 16. a leak-proof plate; 2. closing the plate; 21. a first slider; 211. a first stopper; 22. a fixing plate; 221. a first chute; 222. a first limit groove; 23. a first push block; 231. a first cylinder; 24. a support plate; 241. a second chute; 242. a second limit groove; 25. a rack; 251. a second slider; 252. a second limiting block; 253. a second push block; 254. a second cylinder; 3. a powder feeding pipe; 31. a sliding ring groove; 311. a positioning ring groove; 32. a slip ring; 321. a limiting ring; 322. a sliding groove; 33. a sieve tray; 331. a gear; 332. a slip ring; 333. a support ring; 334. a bump; 34. a fixing ring; 341. a connecting ring; 342. a bottom ring; 343. a first spring; 344. a moving ring; 345. a groove; 346. a rotating rod; 347. a stopper; 35. a screw; 351. fixing the rod; 36. a cylinder; 361. a disc; 362. vibrating the needle; 363. a slide bar; 364. a hole; 4. a powder feeding barrel; 41. a powder outlet pipe; 42. a powder inlet pipe; 421. a sealing cover; 43. a support frame; 5. mounting a disc; 51. a positioning column; 52. mounting a column; 521. a mounting cavity; 522. a fixed block; 523. a connecting rod; 524. a slide bar; 525. a communicating groove; 526. a third cylinder; 53. a rotating shaft; 531. rotating the block; 532. a motor; 54. a fourth cylinder; 6. a sloping plate; 61. screening holes; 62. a collection box; 63. a waste bin; 64. a fan; 7. a blocking frame; 71. a second spring; 8. printing a circular table; 81. positioning holes; 82. mounting holes; 83. fixing grooves; 9. a squeegee; 91. and a fifth cylinder.

Detailed Description

The invention will be further described with reference to the accompanying drawings in which:

as shown in fig. 1 and fig. 5-8: the SLM equipment for avoiding the generation of the holes comprises a substrate 12, a supporting frame 11 fixedly connected to the upper end of the substrate 12, a workbench 1 fixedly connected to the upper end of the supporting frame 11, a fixing plate 22 fixedly connected to the upper end of the workbench 1, a first sliding groove 221 formed at the upper end of the fixing plate 22, a first sliding block 21 slidably connected to the first sliding groove 221, a first limiting block 211 fixedly connected to the lower end of the first sliding block 21, a first limiting groove 222 formed in the fixing plate 22 and arranged at the lower end of the first sliding groove 221, the first limiting block 211 slidably connected to the first limiting groove 222, a sealing plate 2 fixedly connected to the upper end of the first sliding block 21, a first pushing block 23 fixedly connected to the front end of the sealing plate 2, a first cylinder 231 fixedly connected to the right end of the first pushing block 23, the first cylinder 231 fixedly connected to the fixing plate 22 and a sliding ring groove 31 formed at the lower end of a powder feeding tube 3, and a sliding ring 32 slidably connected to the sliding ring groove 31, a limiting ring 321 is fixedly connected to the outer side of the sliding ring 32, a positioning ring groove 311 opened on the powder feeding pipe 3 is arranged on the outer side of the sliding ring groove 31, the limiting ring 321 is slidably connected in the groove of the limiting ring 321, a sieve tray 33 is fixedly connected to the lower end of the sliding ring 32, a gear 331 is fixedly connected to the outer side of the sieve tray 33, a rack 25 is engaged with the rear end of the gear 331, a second slider 251 is fixedly connected to the upper end of the rack 25, a support plate 24 is fixedly connected to the rear end of the seal plate 2, a second sliding groove 241 is opened at the lower end of the support plate 24, the second slider 251 is slidably connected in the second sliding groove 241, a second limiting block 253 is fixedly connected to the upper end of the second limiting block 251, a second air cylinder 254 is fixedly connected to the upper end of the support plate 24, the second limiting block 252 is slidably connected in the second limiting groove 242, a second pushing block 253 is fixedly connected to the upper end of the second limiting block 253, and a second air cylinder 254 is fixedly connected to the upper end of the support plate 24, the outer side of the powder feeding pipe 3 is provided with a sliding ring 332 fixedly connected with the upper end of the sieve tray 33, the upper end of the outer side of the sliding ring 332 is fixedly connected with a support ring 333, the upper end of the support ring 333 is fixedly connected with a convex block 334, the convex block 334 is provided with a plurality of blocks which are uniformly distributed on the support ring 333 at equal intervals, the upper end of the convex block 334 is provided with a fixed ring 34 fixedly connected with the outer side of the powder feeding pipe 3, the lower end of the fixed ring 34 is provided with a groove 345, the groove 345 is provided with a plurality of blocks which are uniformly distributed at equal intervals, the groove 345 is rotatably connected with a rotating rod 346, both sides of the rotating rod 346 are provided with a stop block 347 fixedly connected with the fixed ring 34, the outer side of the lower end of the fixed ring 34 is fixedly connected with a connecting ring 341, the lower end of the connecting ring 341 is fixedly connected with a bottom ring 342, the upper end of the bottom ring 342 is fixedly connected with a first spring 343, the upper end of the first spring 343 is fixedly connected with a moving ring 344, the lower end of the support ring 333, the inner side of the powder feeding pipe 3 is fixedly connected with a fixed rod 351, the lower extreme fixedly connected with screw rod 35 of dead lever 351, the screw rod 35 outside is rotated and is connected with cylinder 36, cylinder 36 outside fixedly connected with disc 361, and it has hole 364 to open on the disc 361, and hole 364 has a plurality of and equidistance evenly distributed, disc 361 lower extreme fixedly connected with vibrating needle 362, disc 361 outside fixedly connected with slide bar 363, and the inboard of sliding ring 32 is opened there is sliding groove 322, slide bar 363 sliding connection is in sliding groove 322.

As shown in fig. 1 and 2: the left end fixedly connected with of shrouding 2 send powder pipe 3, send powder pipe 3 top to install and send powder bucket 4, send 4 lower extreme fixedly connected with of powder bucket to go out powder pipe 41, send 4 upper ends fixedly connected with of powder bucket to advance powder pipe 42, advance powder pipe 42 upper end and install sealed lid 421, send 4 outside fixedly connected with support frames 43 of powder bucket, support frames 43 fixed connection is in 1 upper end of workstation.

As shown in fig. 2-3 and 9: the lower end of the screen disc 33 is provided with a leakage-proof plate 16 fixedly connected with the upper end of the workbench 1, the left side of the leakage-proof plate 16 is provided with a through hole 13 arranged on the workbench 1, the through hole 13 is connected with a mounting disc 5 in a sliding manner, the lower end of the mounting disc 5 is fixedly connected with a fourth air cylinder 54, the fourth air cylinder 54 is fixedly connected with the upper end of the base plate 12, the left side and the right side of the upper end of the mounting disc 5 are fixedly connected with positioning columns 51, the upper end of the mounting disc 5 is provided with a printing circular platform 8, the left side and the right side of the lower end of the printing circular platform 8 are provided with positioning holes 81, the positioning columns 51 are arranged in the positioning holes 81, the upper end of the mounting disc 5 is fixedly connected with mounting columns 52, the lower end of the mounting columns 52 is provided with mounting cavities 521, the mounting cavities 521 are internally provided with fixing blocks 522, the left ends and the right ends of the fixing blocks 522 are rotatably connected with connecting rods 523, one end of the connecting rods 523 far away from the fixing blocks 522 is rotatably connected with a sliding rod 524, the outer side of the mounting cavities 521 is provided with a communicating groove 525 arranged on the mounting columns 52, slide bar 524 sliding connection is in intercommunication groove 525, it has mounting hole 82 to print the lower extreme of round platform 8, erection column 52 is installed in mounting hole 82, it has the fixed slot 83 corresponding with intercommunication groove 525 to print round platform 8 to open, fixed block 522 lower extreme fixedly connected with third cylinder 526, third cylinder 526 fixed connection is on mounting disc 5, 5 lower extreme fixedly connected with pivots 53 of mounting disc, the pivot 53 outside is rotated and is connected with commentaries on classics piece 531, commentaries on classics piece 531 lower extreme fixed connection is on the piston rod of fourth cylinder 54, the pivot 53 front end is equipped with fixed connection motor 532 on the fourth piston rod, pivot 53 front end fixed connection is on the output shaft of motor 532, the left and right sides of mounting disc 5 all is equipped with fan 64 of fixed connection at workstation 1 lower extreme.

As shown in fig. 2-4: the rear end of the through hole 13 is provided with a fifth cylinder 91 fixedly connected to the upper end of the workbench 1, the front end of the fifth cylinder 91 is fixedly connected with a scraper 9, the front end of the through hole 13 is provided with a powder leakage groove 15 formed in the workbench 1, the outer side of the through hole 13 is provided with a mounting groove 14 formed in the upper end of the workbench 1, a blocking frame 7 is slidably connected in the mounting groove 14, one end of a second spring 71 fixedly connected to the lower end of the blocking frame 7 is fixedly connected to the other end of the second spring 71 and is fixedly connected to the workbench 1, a sloping plate 6 fixedly connected to the inner side of the supporting frame 11 is arranged below the powder leakage groove 15, a waste box 63 is installed on the lower side of the right end of the sloping plate 6, a collecting box 62 is installed on the left side of the waste box 63, and sieve meshes 61 formed in the sloping plate 6 are arranged above the collecting box 62.

the method comprises the following steps: starting the first air cylinder 231, driving the first push plate to move leftwards by the first air cylinder 231, driving the sealing plate 2 to move leftwards by the first push plate, driving the powder feeding pipe 3 to move leftwards by the sealing plate 2, moving the powder feeding pipe 3 to the upper end of the printing disc 361, and simultaneously sealing the powder outlet pipe 41 by the sealing plate 2 to avoid powder leakage;

step two: starting a fourth air cylinder 54, driving a mounting disc 5 to descend by one layer of height by the fourth air cylinder 54, driving a printing circular table 8 to descend by one layer of height by the mounting disc 5, starting a second air cylinder 254, driving a second push plate to move left and right by the second air cylinder 254, driving a second limit block 252 to move left and right by the second push plate, driving a second slide block 251 to move left and right by the second limit block 252, driving a rack 25 to slide left and right by the second slide block 251, driving a gear 331 to rotate forward and backward by the rack 25, driving a sieve disc 33 to rotate by the gear 331, and sieving powder on the sieve disc 33 to the upper end of the printing circular disc 361;

step three: the sieve tray 33 rotates to drive the sliding ring 332 to rotate, the sliding ring 332 drives the supporting ring 333 to rotate, the supporting ring 333 drives the projection 334 to rotate, the projection 334 contacts the rotating rod 346 to drive the rotating rod 346 to rotate, the rotating rod 346 contacts the stop block 347 to stop rotating, the projection 334 continues to rotate to enable the projection 334 to move downwards, the projection 334 moves downwards to drive the supporting ring 333 to move downwards, the supporting ring 333 drives the moving ring 344 to move downwards to drive the spring to compress, when the projection 334 is far away from the rotating rod 346, the spring rebounds to generate vibration to drive the sieve plate to vibrate, and therefore the working efficiency of the sieve plate is;

step four: the sieve tray 33 rotates and vibrates to drive the slip ring 32 to rotate and vibrate, the slip ring 32 rotates and vibrates to drive the moving rod to rotate and vibrate, the moving rod rotates and vibrates to drive the disc 361 to rotate and vibrate, the disc 361 rotates and vibrates to drive the vibrating needle 362 to rotate and vibrate, the disc 361 rotates and drives the cylinder 36 to rotate and move up and down simultaneously through the screw 35, the cylinder 36 moves to drive the disc 361 to move, the disc 361 moves to drive the vibrating needle 362 to move, the vibrating needle 362 moves downwards to the powder on the printing circular table 8, the powder on the printing circular table 8 is compacted through the vibration of the vibrating needle 362, and holes 364 are not easy to generate;

step five: after the powder feeding is finished, the powder feeding pipe 3 is restored to the original position through the first air cylinder 231, the fifth air cylinder 91 is started, the fifth air cylinder 91 drives the scraper blade 9 to move back and forth to push redundant powder into the powder leakage groove 15, and the powder on the printing circular table 8 is printed through the laser;

step seven: the fourth cylinder 54 descends the part to the lower end of the workbench 1, the motor 532 is started, the motor 532 drives the rotating rod 346 to rotate, the rotating rod 346 drives the mounting disc 5 to rotate, the mounting disc 5 drives the printing circular truncated cone 8 to rotate, the printing circular truncated cone 8 is inclined, the fan 64 is started to blow powder left on the printing circular truncated cone 8 down to the upper end of the inclined plate 6, and cleaning of the printing circular truncated cone 8 is completed.

While the invention has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

Claims

1. The utility model provides an avoid SLM equipment that hole produced, includes base plate (12), fixed connection support frame (11) in base plate (12) upper end, fixed connection workstation (1) in support frame (11) upper end, characterized by: the powder feeding device is characterized in that a fixed plate (22) is fixedly connected to the upper end of the workbench (1), a first sliding groove (221) is formed in the upper end of the fixed plate (22), the first sliding groove (221) is connected to a first sliding block (21) in a sliding mode, a sealing plate (2) is fixedly connected to the upper end of the first sliding block (21), a first pushing block (23) is fixedly connected to the front end of the sealing plate (2), a first air cylinder (231) is fixedly connected to the right end of the first pushing block (23), the first air cylinder (231) is fixedly connected to the fixed plate (22), a powder feeding pipe (3) is fixedly connected to the left end of the sealing plate (2), a powder feeding barrel (4) is installed above the powder feeding pipe (3), a powder discharging pipe (41) is fixedly connected to the lower end of the powder feeding barrel (4), a powder feeding pipe (42) is fixedly connected to the upper end of the powder feeding barrel (4), a sealing cover (421) is installed at the upper end of the powder feeding pipe (42), a supporting frame (43) is fixedly connected to the outer side of the powder feeding barrel (4), the support frame (43) is fixedly connected to the upper end of the workbench (1), the lower end of the powder feeding pipe (3) is provided with a sliding ring groove (31), the sliding ring groove (31) is connected with a sliding ring (32) in a sliding manner, the outer side of the sliding ring (32) is fixedly connected with a limiting ring (321), the outer side of the sliding ring groove (31) is provided with a positioning ring groove (311) formed in the powder feeding pipe (3), the limiting ring (321) is connected in a limiting ring (321) groove in a sliding manner, the lower end of the sliding ring (32) is fixedly connected with a sieve disc (33), the outer side of the sieve disc (33) is fixedly connected with a gear (331), the rear end of the gear (331) is meshed with a rack (25), the upper end of the rack (25) is fixedly connected with a second sliding block (251), the rear end of the sealing plate (2) is fixedly connected with a support plate (24), the lower end of the support plate (24) is provided with a second sliding groove (241), the second sliding block (251) is connected in the second sliding groove (241), the upper end of the second sliding block (251) is fixedly connected with a second limiting block (252), a second limiting groove (242) formed in the supporting plate (24) is formed in the upper end of the second sliding groove (241), a second limiting block (252) is connected in the second limiting groove (242) in a sliding mode, a second push block (253) is fixedly connected to the upper end of the second limiting block (252), a second air cylinder (254) is fixedly connected to the rear end of the second push block (253), the second air cylinder (254) is fixedly connected to the upper end of the supporting plate (24), a leakage-proof plate (16) fixedly connected to the upper end of the workbench (1) is arranged at the lower end of the screen disc (33), a through hole (13) formed in the workbench (1) is formed in the left side of the leakage-proof plate (16), a mounting disc (5) is connected in the through hole (13) in a sliding mode, a fourth air cylinder (54) is fixedly connected to the lower end of the mounting disc (5), the fourth air cylinder (54) is fixedly connected to the upper end of the substrate (12), positioning columns (51) are fixedly connected to the left side and right side of the upper end of the mounting disc (5), the upper end of the mounting disc (5) is provided with a printing circular truncated cone (8), the left side and the right side of the lower end of the printing circular truncated cone (8) are provided with positioning holes (81), positioning columns (51) are installed in the positioning holes (81), the rear end of each through hole (13) is provided with a fifth air cylinder (91) fixedly connected to the upper end of the workbench (1), the front end of each fifth air cylinder (91) is fixedly connected with a scraper (9), the front end of each through hole (13) is provided with a powder leakage groove (15) formed in the workbench (1), an inclined plate (6) fixedly connected to the inner side of the supporting frame (11) is arranged below the powder leakage groove (15), and a waste material box (63) is installed on the lower side of the right end of the inclined plate (6).

2. The SLM device for avoiding hole generation as claimed in claim 1, characterized in that: the powder feeding device is characterized in that a sliding ring (332) fixedly connected to the upper end of a sieve tray (33) is arranged on the outer side of the powder feeding pipe (3), a support ring (333) is fixedly connected to the upper end of the outer side of the sliding ring (332), a plurality of convex blocks (334) are fixedly connected to the upper end of the support ring (333), a plurality of convex blocks (334) are uniformly distributed on the support ring (333) at equal intervals, a fixing ring (34) fixedly connected to the outer side of the powder feeding pipe (3) is arranged at the upper end of the support ring (333), a groove (345) is formed at the lower end of the fixing ring (34), a plurality of rotary rods (346) are uniformly distributed at equal intervals, rotary rods (345) are rotatably connected in the groove (345), stop blocks (347) fixedly connected to the fixing ring (34) are arranged on two sides of the rotary rods (346), a connecting ring (341) is fixedly connected to the outer side of the lower end of the fixing ring (34), a bottom ring (342) is fixedly connected to the lower end of the connecting ring (341), a first spring (343) is fixedly connected to the upper end of the bottom ring (342), the upper end of the first spring (343) is fixedly connected with a movable ring (344), and the movable ring (344) is positioned at the lower end of the support ring (333).

3. The SLM device for avoiding hole generation as claimed in claim 2, characterized in that: powder feeding pipe (3) upper end inboard fixedly connected with dead lever (351), dead lever (351) lower extreme fixedly connected with screw rod (35), the rotation is connected with cylinder (36) in the screw rod (35) outside, cylinder (36) outside fixedly connected with disc (361), disc (361) lower extreme fixedly connected with vibrating needle (362), disc (361) outside fixedly connected with slide bar (363), slip ring (32) inboard is opened there is sliding groove (322), slide bar (363) sliding connection is in sliding groove (322).

4. An SLM device as claimed in claim 3, characterized in that: the disc (361) is provided with a plurality of holes (364), and the holes (364) are uniformly distributed at equal intervals.

5. The SLM device for avoiding hole generation as claimed in claim 1, characterized in that: the outer side of the through hole (13) is provided with a mounting groove (14) formed in the upper end of the workbench (1), the mounting groove (14) is internally and slidably connected with a blocking frame (7), the lower end of the blocking frame (7) is fixedly connected with one end of a second spring (71), and the other end of the second spring (71) is fixedly connected to the workbench (1).

6. The SLM device as claimed in claim 4, wherein said SLM device is adapted to avoid hole generation by: the upper end of the mounting disc (5) is fixedly connected with a mounting column (52), the lower end of the mounting column (52) is provided with a mounting cavity (521), a fixed block (522) is arranged in the mounting cavity (521), the left end and the right end of the fixed block (522) are rotatably connected with a connecting rod (523), one end, far away from the fixed block (522), of the connecting rod (523) is rotatably connected with a sliding rod (524), the outer side of the mounting cavity (521) is provided with a communicating groove (525) formed in the mounting column (52), the sliding rod (524) is slidably connected in the communicating groove (525), the lower end of the printing circular table (8) is provided with a mounting hole (82), the mounting column (52) is mounted in the mounting hole (82), the printing circular table (8) is provided with a fixing groove (83) corresponding to the communicating groove (525), the lower end of the fixed block (5) is fixedly connected with a third cylinder (526), the third cylinder (526) is fixedly connected to the mounting disc (5), the lower end of the mounting disc (5) is fixedly connected with a rotating shaft (53), the outer side of the rotating shaft (53) is rotatably connected with a rotating block (531), the lower end of the rotating block (531) is fixedly connected to a piston rod of a fourth air cylinder (54), a motor (532) fixedly connected to a fourth piston rod is arranged at the front end of the rotating shaft (53), the front end of the rotating shaft (53) is fixedly connected to an output shaft of the motor (532), and fans (64) fixedly connected to the lower end of the workbench (1) are arranged on the left side and the right side of the mounting disc (5).

7. The SLM device for avoiding hole generation as claimed in claim 1, characterized in that: a collecting box (62) is arranged on the left of the waste box (63), and sieve holes (61) arranged on the inclined plate (6) are arranged above the collecting box (62).

8. The SLM device for avoiding hole generation as claimed in claim 1, characterized in that: the lower end of the first sliding block (21) is fixedly connected with a first limiting block (211), the lower end of the first sliding groove (221) is provided with a first limiting groove (222) formed in the fixing plate (22), and the first limiting block (211) is connected in the first limiting groove (222) in a sliding mode.

9. The method according to claim 6, wherein the SLM device is used for avoiding the generation of holes, and comprises the following steps:

the method comprises the following steps: the first air cylinder (231) is started, the first air cylinder (231) drives the first push plate to move leftwards, the first push plate drives the sealing plate (2) to move leftwards, the sealing plate (2) drives the powder feeding pipe (3) to move leftwards, the powder feeding pipe (3) is moved to the upper end of the printing disc (361), and meanwhile the sealing plate (2) seals the powder outlet pipe (41) to avoid powder leakage;

step two: starting a fourth air cylinder (54), driving a mounting disc (5) to descend by one layer of height by the fourth air cylinder (54), driving a printing circular table (8) to descend by one layer of height by the mounting disc (5), starting a second air cylinder (254), driving a second push plate to move left and right by the second air cylinder (254), driving a second limiting block (252) to move left and right by the second push plate, driving a second sliding block (251) to move left and right by the second limiting block (252), driving a rack (25) to slide left and right by the second sliding block (251), driving a gear (331) to rotate forward and backward by the rack (25), driving a sieve disc (33) to rotate by the gear (331), and sieving powder on the sieve disc (33) to the upper end of the printing circular disc (361);

step three: the sieve tray (33) rotates to drive the sliding ring (332) to rotate, the sliding ring (332) drives the support ring (333) to rotate, the support ring (333) drives the lug (334) to rotate, the lug (334) contacts the rotating rod (346) to drive the rotating rod (346) to rotate, the rotating rod (346) contacts the stop block (347) to stop rotating, the lug (334) continues to rotate to enable the lug (334) to move downwards, the lug (334) moves downwards to drive the support ring (333) to move downwards, the support ring (333) drives the moving ring (344) to move downwards to drive the spring to compress, and when the lug (334) is far away from the rotating rod (346), the spring rebounds to generate vibration to drive the sieve plate to vibrate, so that the working efficiency of the sieve plate is improved;

step four: the sieve tray (33) rotates and vibrates to drive the slip ring (32) to rotate and vibrate, the slip ring (32) rotates and vibrates to drive the moving rod to rotate and vibrate, the moving rod rotates and vibrates to drive the disc (361) to rotate and vibrate, the disc (361) rotates and vibrates to drive the vibrating needle (362) to rotate and vibrate, the disc (361) rotates and drives the cylinder (36) to rotate, the cylinder (36) rotates and moves up and down through the screw (35), the disc (36) moves to drive the disc (361) to move, the disc (361) moves to drive the vibrating needle (362) to move, the vibrating needle (362) moves downwards into powder on the printing circular table (8), the powder on the printing circular table (8) is compacted through the vibration of the vibrating needle (362), and holes (364) are not easy to generate;

step five: after powder feeding is finished, the powder feeding pipe (3) is restored to the original position through the first air cylinder (231), the fifth air cylinder (91) is started, the fifth air cylinder (91) drives the scraper (9) to move back and forth to push redundant powder into the powder leakage groove (15), and the powder on the printing circular table (8) is printed through the laser;

step seven: the fourth cylinder (54) drops the part to workstation (1) lower extreme, starter motor (532), and motor (532) drive bull stick (346) rotate, and bull stick (346) drive mounting disc (5) rotate, and mounting disc (5) drive prints round platform (8) and rotates for print round platform (8) slope, start fan (64) will print the powder that leaves on round platform (8) and blow down swash plate (6) upper end, accomplish the clearance of printing round platform (8).