CN111873125A - Mechanical bidirectional automatic switching scraper device applied to 3D printer - Google Patents
Mechanical bidirectional automatic switching scraper device applied to 3D printer Download PDFInfo
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- CN111873125A CN111873125A CN202010775508.4A CN202010775508A CN111873125A CN 111873125 A CN111873125 A CN 111873125A CN 202010775508 A CN202010775508 A CN 202010775508A CN 111873125 A CN111873125 A CN 111873125A
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- scraper
- shifting fork
- sliding plate
- automatic switching
- horizontal moving
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 19
- 230000033001 locomotion Effects 0.000 claims abstract description 13
- 238000010304 firing Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 238000007639 printing Methods 0.000 claims description 24
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 description 9
- 239000002002 slurry Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000000284 resting effect Effects 0.000 description 3
- 238000007790 scraping Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/001—Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/214—Doctor blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
- C04B2235/665—Local sintering, e.g. laser sintering
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
The invention provides a mechanical bidirectional automatic switching scraper device applied to a 3D printer, which comprises: the horizontal moving sliding plate, the scraper frame, the shifting fork device and the firing pin; scrapers are arranged on both sides of the scraper frame; the shifting fork device is connected with the horizontal movement sliding plate shaft, when the scraper frame reaches the position of the striker, the striker impacts the top end of the shifting fork device, so that the bottom end of the shifting fork device swings and stirs the scraper frame, and the scraper frame swings on the horizontal movement sliding plate, so that scrapers on two sides of the scraper frame are switched. Adopt the double knives structure, realize the automatic switch-over double knives when removing about, not only solved the automatic feeding problem of 3D printer to realize automatic switching-over through firing pin and the cooperation of shift fork device, when guaranteeing the scraper precision, still make the tool changing process quicker, the tool changing mode is stable, reliable, realize unmanned, the automatic operation processing material loading, the artifical unstable problem of precision of paining can not appear, consequently work precision, efficiency and reliability problem have been solved.
Description
Technical Field
The invention belongs to the technical field of 3D printing, and particularly relates to a mechanical bidirectional automatic switching scraper device applied to a 3D printer.
Background
A scraper device is often used in a full-automatic SLA laser 3D printer, and the principle of the scraper device is that a printed object is divided into a plurality of layers, and one layer of raw material is added when one layer is solidified. The scraper device is to evenly coat raw materials on a workbench, the scraper device generally adopts a single blade type, the single blade efficiency is not high, and the ideal effect cannot be achieved. The person skilled in the art therefore proposes a squeegee device of double-blade construction. But the great ceramic thick liquids of viscosity can't be better handled to present double knives structure scraper means, can't accomplish automatic feeding promptly, and material loading and tool changing all need the staff to assist moreover, consequently often appears because the human factor leads to the printing precision to reach the condition of requirement. In addition, the prior scraper device with a double-cutter structure has a complex structure, so that the cutter changing mode is slow, unstable and low in reliability.
Disclosure of Invention
In order to solve the technical problem, the invention provides a mechanical bidirectional automatic switching scraper device applied to a 3D printer.
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
The invention adopts the following technical scheme:
in some optional embodiments, the present invention provides a mechanical bidirectional automatic switching doctor device applied to a 3D printer, including: the device comprises a horizontal moving sliding plate, a scraper frame, a shifting fork device and a firing pin positioned at a left-right moving terminal of the horizontal moving sliding plate; scrapers are arranged on both sides of the scraper frame; the shifting fork device is connected with the horizontal moving sliding plate shaft, when the scraper frame drives the scraper to reach the position of the striker, the striker impacts the top end of the shifting fork device, so that the bottom end of the shifting fork device swings and stirs the scraper frame, and the scraper frame swings on the horizontal moving sliding plate, so that the scrapers on two sides of the scraper frame are switched.
In some optional embodiments, the fork arrangement comprises: the scraper rack comprises a shifting fork, a shifting fork piston rod and a shifting fork roller, wherein the shifting fork is connected with a horizontal moving sliding plate shaft, the shifting fork piston rod is arranged at the lower end of the shifting fork, the tail end of the shifting fork piston rod is connected with the shifting fork roller, a strip-shaped groove is formed in the scraper rack, the shifting fork roller is located in the strip-shaped groove, and when the scraper rack drives the scraper to reach the position of the striker, the striker impacts the shifting fork to enable the bottom end of the shifting fork piston rod to swing so as to drive the shifting fork roller to roll in the strip-shaped groove and stir the scraper rack which swings on the horizontal moving sliding plate.
In some optional embodiments, the fork arrangement further comprises: and one end of the compression spring is connected with the shifting fork, and the other end of the compression spring is connected with the shifting fork piston rod.
In some optional embodiments, the fork arrangement further comprises: a support shaft, a bearing and a fixed block; the bearing is arranged in the shifting fork and fixedly connected with the shifting fork, the bearing sleeve is arranged on the supporting shaft, and two ends of the supporting shaft are fixedly connected with the horizontal movement sliding plate through the fixing blocks.
In some optional embodiments, a positioning screw for adjusting the angle of the scraper frame is arranged on the horizontal moving sliding plate.
In some optional embodiments, the squeegee assembly further comprises: and a buffer arranged on the horizontal moving sliding plate.
In some optional embodiments, mounting grooves are formed in two sides of the scraper holder, blade mounting plates are arranged in the mounting grooves, two scrapers are respectively mounted on two sides of the scraper holder through the blade mounting plates, and the two scrapers form a certain angle with each other.
In some optional embodiments, inclined surfaces are arranged at two ends of the scraper frame, inclined wedge adjusting blocks attached to the inclined surfaces are arranged at positions of the blade mounting plate corresponding to the inclined surfaces, and the inclined wedge adjusting blocks are mounted in grooves at two ends of the blade mounting plate through fine-tooth screws.
In some optional embodiments, further comprising: and the nut is matched with the fine-tooth screw for use.
In some optional embodiments, the gap between the scraper which is put into use and the printing table surface of the printer in two scrapers is 0.1-0.3 mm.
The invention has the following beneficial effects: by adopting the double-cutter structure, automatic double-cutter switching is realized when the scraper moves left and right, the automatic feeding problem of the 3D printer is solved, automatic reversing is realized by matching the firing pin and the shifting fork device, the precision of the scraper is ensured, the cutter changing process is quicker, the cutter changing mode is stable and reliable, the 3D printer can realize unmanned and automatic operation and feeding through the scraper device, the problem of unstable precision of manual smearing is avoided, and the problems of working precision, efficiency and reliability are solved.
Drawings
FIG. 1 is a perspective view of the mechanical, two-way auto-switching doctor apparatus of the present invention;
FIG. 2 is a top view of the mechanical, bidirectional auto-switching doctor apparatus of the present invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic structural diagram of the mechanical two-way auto-switching doctor apparatus of the present invention;
FIG. 5 is a cross-sectional view of the mechanical, bi-directional automatic switching doctor apparatus of the present invention;
FIG. 6 is a schematic view of the construction of the precision adjustment apparatus for a cutter head according to the present invention;
FIG. 7 is a schematic structural diagram of a wedge adjustment block according to the present invention;
FIG. 8 is a schematic view of the position of the mechanical bi-directional automatic switching doctor device and reference plate of the present invention;
FIG. 9 is a schematic view of the position of the mechanical bidirectional auto-switching doctor blade assembly of the present invention in a 3D printer;
FIG. 10 is a schematic structural view of the fuselage of the present invention;
FIG. 11 is a schematic structural diagram of the lifting device of the present invention;
FIG. 12 is a schematic view of the structure of the work table of the present invention;
FIG. 13 is a schematic view of the position of the magnetic pole piece of the present invention;
FIG. 14 is a schematic view of the position of the locating pin of the present invention;
FIG. 15 is a schematic view of the chute of the present invention;
fig. 16 is a schematic position diagram of the magnetic conductive block and the first magnetic conductive plate of the present invention;
fig. 17 is a schematic view of the structure of the magnetic pole piece of the present invention.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others.
As shown in fig. 1 to 17, in some illustrative embodiments, the present invention provides a mechanical bidirectional automatic switching doctor device applied to a 3D printer, including: the horizontal moving sliding plate 303 drives the scraper 304 to reciprocate above the printing table of the printer, so as to scrape off the slurry supplied by the feeding system 200. The horizontal movement sliding plate 303 is mounted on the reference flat plate 502 through the sliding rail 302 to realize translation in a printing work area, the horizontal movement sliding plate 303 is connected with the motor 301 through a synchronous belt, and the motor 301 drives the scraper device 300 to move along the sliding rail 302.
The invention also includes: a scraper holder 305. The blade holder 305 is connected to the horizontally movable slide 303 via a pivot 306, i.e. the blade holder 305 can swing on the horizontally movable slide 303. The horizontal moving slide plate 303 is connected with the slide rail 302 to realize translation, and the scraper frame 305 realizes rotation around the rotating shaft 306. Both sides of the scraper holder 305 are provided with scrapers 304, and the two scrapers 304 form a certain angle with each other.
Scrape the blade holder 305 left and right sides and all be equipped with scraper 304, when scraper device 300 toward scraping material on one side, one side scraper 304 work, another side scraper 304 improves the constant height and is out of work, when the switching-over, scrape the swing of blade holder 305, another side scraper 304 falls, former work scraper 304 promotes, realizes the tool changing function, switches the scraper 304 of scraping the blade holder both sides promptly.
As shown in fig. 1 to 5, the present invention further includes: a fork arrangement 313 and a striker 314. The horizontal moving slide plate 303 reciprocates left and right, namely the horizontal moving slide plate 303 reciprocates above the printing table of the printer, and the two side ends of the moving route are both provided with strikers 314, namely the left and right moving ends of the horizontal moving slide plate 303 are provided with strikers 314, and the purpose of the strikers 314 is that when the horizontal moving slide plate 303 reaches the strikers 305 with the strikers 314, the strikers 314 apply a pushing force to the shifting fork device 313, so that the strikers 305 swing.
The fork device 313 is connected with the horizontal sliding plate 303 in an axial mode, namely when the fork device 313 swings under the action of the firing pin 314, the scraper frame 305 is driven to swing, the horizontal sliding plate 303 is taken as a rotation supporting point, and the horizontal sliding plate 303 is not influenced. When the scraper holder 305 brings the scrapers 304 to the position of the striker 314, the striker 314 strikes the top end of the fork device 313 to deflect the top end of the fork device 313 in the direction opposite to the moving direction of the horizontal moving sliding plate, so that the bottom end of the fork device 313 swings, the bottom end of the fork device 313 is connected with the scraper holder 305, and finally the bottom end of the fork device 313 pulls the scraper holder 305 to rotate, that is, the scraper holder 305 swings on the horizontal moving sliding plate 303, so that the scrapers 304 on both sides of the scraper holder 305 are switched.
The fork device 313 includes: a fork 315, a fork piston rod 316 and a fork roller 317. The shifting fork 315 is connected with the horizontal moving sliding plate 303 through a shaft, a shifting fork piston rod 316 is arranged at the lower end of the shifting fork 315 and forms a telescopic structure with the shifting fork 315, the tail end of the shifting fork piston rod 316 is connected with a shifting fork roller 317, and the shifting fork roller 317 can rotate at the tail end of the shifting fork piston rod 316. The shift roller 317 is coupled to the shift piston rod 316 via a pin 318.
As shown in fig. 5, a strip groove 319 is formed on the scraper holder 305, and the shifting fork roller 317 is located in the strip groove 319 and can roll in the strip groove 319. When the scraper holder 305 drives the scraper 304 to reach the position of the striker 314, the striker 314 strikes the shift fork 315, so that the bottom end of the shift fork piston rod 316 swings to drive the shift fork roller 317 to roll in the strip-shaped groove 319, the rolling shift fork roller 317 applies thrust to the scraper holder 305, and the left-right deviation process of the shift fork roller 317 stirs the scraper holder 305 to rotate, that is, the scraper holder 305 swings on the horizontal moving sliding plate 303, so as to switch the scrapers 304 on both sides of the scraper holder 305.
The shift fork device still includes: one end of the compression spring 320 is connected with the shifting fork 315, the other end of the compression spring 320 is connected with the shifting fork piston rod 316, and the compression spring 320 is always in a compression state. Due to the action of the spring force in the piston rod of the shifting fork, the shifting fork device can firmly push against the scraper holder 305 in the swinging process, so that the scraper holder 305 is firmly pushed after swinging, and the positioning function is realized. The fixation of the blade holder 305 is made more secure, stable and at the same time more reliable by the compression spring 320.
The shift fork device still includes: a support shaft 321, a bearing 322 and a fixing block 323. The bearing 322 is arranged in the shifting fork 315 and fixedly connected with the shifting fork 315, the bearing 322 is sleeved on the supporting shaft 321, and two ends of the supporting shaft 321 are fixedly connected with the horizontal movable sliding plate 303 through the fixing block 323. Therefore, the scraper frame takes the horizontal moving sliding plate 303 as a rotating supporting point, but the horizontal moving sliding plate 303 is not influenced, and the structure is simple and stable.
Shifting fork gyro wheel 317 can roll in bar groove 319 on the shift fork device, and when the shift fork device upper end received external force, rotary motion was realized around the pivot to the shift fork device, because the spring force effect in the shift fork piston rod, the frame was scraped in shift fork device firmly push up, scraped the frame and realized firmly pushing up after the swing like this, realized locate function. When the scraper moves to the other side, the actions are repeated, and the automatic tool changing function is realized. After the scraper 304 with the slurry completely penetrates through the printing table surface, the blade with the structure of the invention realizes pendulum, the scraper on the other side falls down, the scraper on the original side is lifted, and the scraper with the residual material returns to repeat the previous action, so that the reciprocating action solves the automatic feeding problem of the 3D printer. The clearance between the scraper and the workbench in use in the two scrapers is 0.1-0.3 mm.
The horizontal moving sliding plate 303 is provided with a positioning screw 324 for adjusting the angle of the scraper holder 305, which is used for adjusting the angle of the scraper holder 305 and plays a role of accurate limit, thereby ensuring the positioning accuracy and repeated positioning accuracy of each swing. The invention also includes: a buffer 325 is provided on the horizontal moving slide 303 for buffering the impact when the holder is swung to position.
Mounting grooves are formed in the two sides of the scraper frame 305, blade mounting plates 326 are arranged in the mounting grooves, and the two scrapers 304 are respectively mounted on the two sides of the scraper frame 305 through the blade mounting plates 326.
As shown in fig. 6 to 7, the present invention also provides a tool bit accuracy adjusting device comprising: a tapered wedge adjustment block 327, a fine thread screw 328, and a nut 329 for use with the fine thread screw.
The fine-tooth screw 328 is screwed, the inclined wedge adjusting block 327 and the scraper frame 305 form a squeezing effect, an included angle alpha is formed between the inclined plane of the inclined wedge adjusting block 327 and the horizontal plane, the horizontal moving length L is formed when the fine-tooth screw 328 is screwed, the height direction moves up or down by L multiplied tan alpha, the smaller the angle alpha is, the smaller the value of L multiplied tan alpha is, and therefore the blade mounting plate 326 and the scraper 304 realize fine adjustment up or down. Both ends of the doctor 304 are adjusted in the same way, and after adjustment into position, the nut 329 is tightened and secured: the oblique wedge adjustment block 327 is finally locked to the scraper stand 305 by the set screw 331, and the adjustment is completed.
The cutter head precision adjusting device enables the gap between the cutter edge and the printing table top to be accurately adjusted, can realize quick micro-adjustment of the precision of the scraper, has a simple structure, is convenient to operate, and provides guarantee for the precision of a finished product of a 3D printer.
The mechanical bidirectional automatic switching scraper device applied to the 3D printer can be used as the scraper device 300 when being applied to the 3D printer. As shown in fig. 9, the 3D printer includes: laser scanning system 100, feed system 200, squeegee assembly 300.
The invention also includes: and a main body 500 for carrying all the systems and mechanisms of the printer.
As shown in fig. 10, the body 500 includes: a main body 501 and a reference plate 502. The reference flat plate 502 is arranged at the top of the main body 501 of the machine body, the reference flat plate 502 is a bearing surface and a reference surface of the main parts of the machine body, and the main body 501 of the machine body is a three-dimensional stable structure formed by welding square pipes.
A square groove 505 is formed in the middle of the reference flat plate 502, and a printing table top of the workbench ascends and descends in the square groove 505 to form a printing core working area. A silo may be provided in the square groove 505 and the feeding system 200 feeds the silo to supply the ceramic slurry to the work table 400.
The body 500 further includes: a horizontal adjustment mechanism 507, a mounting plate 503 and a shock-proof foot cup 506. The vibration prevention cup 506 is provided at the bottom of the body main body 501. The horizontal adjustment mechanism 507 is disposed between the main body 501 and the reference plate 502 to adjust the levelness of the reference plate 502, and an existing horizontal adjustment mechanism is adopted, which is not described herein again. A mounting plate 503 is provided on the body 501 perpendicular to the body 501 for mounting a driving part of the table 400. The body 500 further includes: a transverse mounting plate 504, on which transverse mounting plate 504 a drive or control portion of the printer may be mounted.
The laser scanning system 100, located above the platen 400, is used to generate a laser beam that cures the ceramic slurry to cure the slurry on the printing table top of the platen 400.
The supply system 200 is provided on the main body 501 to supply the slurry to the work table 400.
The invention also includes: a work table 400; the worktable 400 is a liftable worktable, and is lifted through a liftable device to realize the Z-direction movement of a workpiece in the printing process.
As shown in fig. 11, the lifting device includes: power motor 404, motor mount 405, bottom plate 406, sleeve 407 and support plate 410. The power motor 404 is installed on the bottom plate 406 through the motor base 405, the bottom plate 406 is arranged at the bottom of the installation flat plate 503, the driving shaft of the power motor 404 is connected with the sleeve 407 through the ball screw transmission mechanism, the supporting plate 410 is arranged at the top of the sleeve 407, and the printing table top 412 of the workbench is arranged on the supporting plate 410. The power motor 404 drives the sleeve 407 to move up and down through the ball screw transmission mechanism, so as to drive the printing table 412 of the workbench to move up and down. The ball screw transmission mechanism is one of the existing transmission mechanisms, the ball screw is a product which converts rotary motion into linear motion or converts linear motion into rotary motion, and the specific structure is not repeated herein. The beneficial effect of the combination is that the workbench can be quickly positioned and fixed, and the workbench can be quickly assembled and disassembled. The lifting workbench is a workpiece placing platform and is a core working area of the whole machine. The lifting positioning precision and the repeated positioning precision directly influence the working precision of the whole machine, the printing platform can be quickly disassembled, and the precision is kept unchanged after the printing platform is installed and recovered.
Liftable device still includes: the sliding plate 403 is connected with the guide rail 401 through the sliding block 402, the sleeve 407 is connected with the sliding plate 403, the guide rail 401 is arranged on the mounting flat plate 503, support is provided for the up-and-down movement of the sleeve, and the structure is stable.
As shown in fig. 12 to 17, the table 400 includes: a magnetic base 414 and a workpiece tray 415 positioned on the top surface of the magnetic base 414; the magnetic base 414 and the workpiece tray 415 form a printing table of the table 400. The magnetic base 414 is a mechanism for connecting the workpiece tray 415, and can switch on and off the magnetic force to control the mounting and dismounting of the workpiece tray 415.
The magnetic base 414 includes: the magnetic pole piece comprises a first magnetic conductive piece 427, a magnetic pole piece 423 and a magnetic base plate 424, wherein a sliding groove 425 is formed in the bottom surface of the magnetic base plate 424, the magnetic pole piece 423 is located in the sliding groove 425 and can move in the sliding groove 425, and the workpiece tray 415 and the magnetic pole piece 423 are located on the upper surface and the lower surface of the magnetic base plate 424 respectively.
The slide groove 425 is provided with a working position and a rest position, and the magnetic pole piece 423 reciprocates in the slide groove 425 to realize switching between the working position and the rest position. The working position in the sliding groove 425 is provided with a magnetic conduction block 426 penetrating through the bottom of the sliding groove, namely one end of the magnetic conduction block 426 can contact the magnetic pole shoe 423 in the sliding groove, and the other end of the magnetic conduction block 426 passes through the magnetic base plate 424 to contact the workpiece tray 415, so that the position of the magnetic conduction block 426 is the working position. Two ends of the first magnetic conductive sheet 427 are located at a rest position in the sliding slot 425, that is, the positions of the two ends of the first magnetic conductive sheet 427 are referred to as the rest position, and the first magnetic conductive sheet 427 does not penetrate through the magnetic base plate 424, i.e., cannot contact the workpiece tray 415.
When the magnetic pole piece 423 reaches the working position, the magnetic pole piece, the magnetic conduction block 426 and the workpiece tray 415 are closed, so that the suction force is generated to suck the workpiece tray 415, and then the scraping printing can be started. When the magnetic pole piece 423 reaches the rest position, the magnetic force disappears, and the magnetic pole piece cannot fix the workpiece tray 415, that is, the workpiece tray 415 is released, and then the workpiece tray 415 can be detached for cleaning.
Therefore, the workbench is convenient to disassemble and easy to clean under the action of a mechanical device and magnetism, the time for disassembling and cleaning the printing table top can be shortened during continuous printing, and the cleaning time is saved, so that the printing efficiency is improved, and one workpiece can be directly disassembled after being printed and replaced by another workpiece tray for printing; the structure is reliable, and the positioning is accurate; because the magnetic force is absorbed by the magnetic conductive sheets embedded on the workpiece tray, the workpiece tray is not slightly deformed by dismounting, so that the printing precision can be ensured, the printing is stable and accurate, and the cost is lower; through the effect of electromagnetism, solved fixed firm problem, fix a position the problem fast when having solved the installation through the round pin location.
Two sliding grooves 425 are formed in the bottom surface of the magnetic base plate 424, and one magnetic pole piece 423 is arranged in each sliding groove 425, so that two positions capable of sucking the workpiece tray 415 are provided, and the sucking is firmer and more stable.
Cylindrical permanent magnets 428 are arranged at two ends of the magnetic pole piece 423, the working position comprises two cylindrical magnetic conduction blocks 426, and the working position and the resting position are arranged in a crossed mode, so that the magnetic pole piece 423 can be switched between the working position and the resting position without moving too far, and the working stability of the whole component is improved.
The workpiece tray 415 is provided with a second magnetic conductive piece at a position corresponding to the sliding slot 425 on a side facing the magnetic base plate, so that the magnetic pole pieces, the magnetic conductive blocks 426 and the workpiece tray 415 are closed, and the workpiece tray 415 is sucked by suction force.
The magnetic base 414 further includes: and a driving device for driving the magnetic pole piece 423 to move in the sliding groove 425. The drive device includes: a spindle 429, a spindle bushing 430, a spindle handle 431, and a gear 432; the shaft handle 431 is connected to a shaft 429, and the shaft 429 is provided with a gear 432 that engages with the gear teeth of the magnetic pole piece 423. When the rotating shaft handle 431 is rotated during disassembly, the rotating shaft 429 is driven to rotate, when the rotating shaft 429 rotates, the magnetic pole piece 423 is driven to move in the sliding groove 425 through the gear 432, and at the moment, the magnetic pole piece 423 is equivalent to a rack. When the rotating shaft handle 431 is swung left and right, the magnetic pole piece 423 can be switched between the working position and the resting position. Simple structure, easy operation, cost are lower, switching speed is fast, promotes tray and changes efficiency.
The workpiece tray 415 is made of stainless steel, and has small deformation, wear resistance and corrosion resistance.
The work table 400 further includes: and a locating pin 420. The magnetic base 414 and the workpiece tray 415 are both provided with a cylindrical pin slot 421 for accommodating the positioning pin 420, so that the workpiece tray 415 is accurately positioned in the installation process, and the workpiece tray 415 and the magnetic base 414 are accurately positioned.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
Claims (10)
1. The utility model provides a be applied to two-way automatic switch-over scraper device of mechanical type of 3D printer which characterized in that includes: the device comprises a horizontal moving sliding plate, a scraper frame, a shifting fork device and a firing pin positioned at a left-right moving terminal of the horizontal moving sliding plate; scrapers are arranged on both sides of the scraper frame; the shifting fork device is connected with the horizontal moving sliding plate shaft, when the scraper frame drives the scraper to reach the position of the striker, the striker impacts the top end of the shifting fork device, so that the bottom end of the shifting fork device swings and stirs the scraper frame, and the scraper frame swings on the horizontal moving sliding plate, so that the scrapers on two sides of the scraper frame are switched.
2. The mechanical bidirectional automatic switching scraper device applied to the 3D printer according to claim 1, wherein the shifting fork device comprises: the scraper rack comprises a shifting fork, a shifting fork piston rod and a shifting fork roller, wherein the shifting fork is connected with a horizontal moving sliding plate shaft, the shifting fork piston rod is arranged at the lower end of the shifting fork, the tail end of the shifting fork piston rod is connected with the shifting fork roller, a strip-shaped groove is formed in the scraper rack, the shifting fork roller is located in the strip-shaped groove, and when the scraper rack drives the scraper to reach the position of the striker, the striker impacts the shifting fork to enable the bottom end of the shifting fork piston rod to swing so as to drive the shifting fork roller to roll in the strip-shaped groove and stir the scraper rack which swings on the horizontal moving sliding plate.
3. The mechanical bidirectional automatic switching scraper device applied to the 3D printer according to claim 2, wherein the shifting fork device further comprises: and one end of the compression spring is connected with the shifting fork, and the other end of the compression spring is connected with the shifting fork piston rod.
4. The mechanical bidirectional automatic switching scraper device applied to the 3D printer according to claim 3, wherein the shifting fork device further comprises: a support shaft, a bearing and a fixed block; the bearing is arranged in the shifting fork and fixedly connected with the shifting fork, the bearing sleeve is arranged on the supporting shaft, and two ends of the supporting shaft are fixedly connected with the horizontal movement sliding plate through the fixing blocks.
5. The mechanical bidirectional automatic switching scraper device applied to the 3D printer according to claim 4 is characterized in that a positioning screw for adjusting the angle of the scraper frame is installed on the horizontal moving sliding plate.
6. The mechanical bidirectional automatic switching scraper device applied to the 3D printer according to claim 5, characterized in that the scraper device further comprises: and a buffer arranged on the horizontal moving sliding plate.
7. The mechanical bidirectional automatic switching scraper device applied to the 3D printer according to claim 6, wherein mounting grooves are formed in two sides of the scraper frame, blade mounting plates are arranged in the mounting grooves, two scrapers are respectively mounted on two sides of the scraper frame through the blade mounting plates, and the two scrapers form a certain angle with each other.
8. The mechanical bidirectional automatic switching scraper device applied to the 3D printer according to claim 7, wherein inclined planes are arranged at two ends of the scraper frame, the blade mounting plate is provided with inclined wedge adjusting blocks attached to the inclined planes at positions corresponding to the inclined planes, and the inclined wedge adjusting blocks are mounted in the grooves at two ends of the blade mounting plate through fine-tooth screws.
9. The mechanical bidirectional automatic switching scraper device applied to the 3D printer according to claim 8, further comprising: and the nut is matched with the fine-tooth screw for use.
10. The mechanical bidirectional automatic switching scraper device applied to the 3D printer according to claim 9, wherein a gap between a scraper in use and a printing table of the printer in the two scrapers is 0.1-0.3 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010775508.4A CN111873125A (en) | 2020-08-05 | 2020-08-05 | Mechanical bidirectional automatic switching scraper device applied to 3D printer |
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| CN202010775508.4A CN111873125A (en) | 2020-08-05 | 2020-08-05 | Mechanical bidirectional automatic switching scraper device applied to 3D printer |
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| CN202010775508.4A Pending CN111873125A (en) | 2020-08-05 | 2020-08-05 | Mechanical bidirectional automatic switching scraper device applied to 3D printer |
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| CN112140737A (en) * | 2020-11-26 | 2020-12-29 | 上海韬涵医疗科技有限公司 | Print head unit of ink ribbon printer, print head device, and ink ribbon printer |
| CN114272998A (en) * | 2022-01-18 | 2022-04-05 | 湖南金阳烯碳新材料有限公司 | Grinding device and method for producing ultra-low resistance graphene composite conductive ink |
| CN115319882A (en) * | 2022-08-11 | 2022-11-11 | 江苏乾度智造高科技有限公司 | Cantilever type bidirectional switching 3D printing scraper |
| CN115338433A (en) * | 2022-10-17 | 2022-11-15 | 西安赛隆增材技术股份有限公司 | Pendulum type scraper device and selective melting and material increase manufacturing equipment for powder bed |
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