CN110757800A

CN110757800A - Industry sla laser 3D printer

Info

Publication number: CN110757800A
Application number: CN201911221774.6A
Authority: CN
Inventors: 方金光; 刘荣捷
Original assignee: Zongheng Additive Intelligent Technology (zhuhai) Co Ltd
Current assignee: Zongheng Additive Intelligent Technology (zhuhai) Co Ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-02-07

Abstract

The invention discloses an industrial sla laser 3D printer, and aims to provide an industrial sla laser 3D printer which is high in automation degree, convenient to assemble and high in machining efficiency. The invention comprises a rack and a workbench arranged in the rack, wherein a hopper is embedded in the workbench, a Z-axis mechanism is arranged on the workbench, a screen plate tray lifting mechanism positioned above the hopper is arranged on the front surface of the Z-axis mechanism, a reciprocating scraper mechanism is arranged between two ends of the hopper, a laser assembly is arranged at the upper end of the rack, the laser of the laser assembly faces the hopper, and a cantilever operation box is also arranged on the rack. The invention is applied to the technical field of 3D printers.

Description

Industry sla laser 3D printer

Technical Field

The invention relates to a3D printer, in particular to an industrial sla laser 3D printer.

Background

SLA is "three-dimensional photocuring shaping", and industry SLA laser 3D printer is through the laser beam on the photosensitive resin surface of liquid sketching the first layer shape of object, then makes the platform and descends certain distance, lets the cured layer dip in liquid resin again, so repeat until printing the shaping. And finally, taking the prototype out of the resin, carrying out final curing, and carrying out polishing, electroplating, paint spraying or coloring treatment to obtain the required product.

The 3D printing key is to ensure the consistency of printed parts and modeling prototypes, the positioning precision requirement is very high, SLA3D printing is an advanced laser photocuring technology at present, but the positioning precision is difficult to ensure by installation and positioning during printing of the existing equipment, the mechanism is complex, and the debugging needs experienced professional operators; after each layer is printed, the base moves downwards to supplement resin, and the flatness of the liquid level of the resin is difficult to ensure; in addition, the existing laser beam draws objects on the surface of the liquid photosensitive resin through a vibrating mirror, but the aperture of the existing laser beam is not adjustable and cannot be adjusted according to the precision requirement of a product.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide the industrial sla laser 3D printer which is high in automation degree, convenient to assemble and high in processing efficiency.

The technical scheme adopted by the invention is as follows: the invention comprises a rack and a workbench arranged in the rack, wherein a hopper is embedded in the workbench, a Z-axis mechanism is arranged on the workbench, a screen plate tray lifting mechanism positioned above the hopper is arranged on the front surface of the Z-axis mechanism, a reciprocating scraper mechanism is arranged between two ends of the hopper, a laser assembly is arranged at the upper end of the rack, the laser of the laser assembly faces the hopper, and a cantilever operation box is also arranged on the rack.

Further, the cantilever operation box includes cantilever, cantilever footstock, display screen, keyboard and MCU controller, the one end of cantilever with the frame is fixed mutually, the other end of cantilever with the cantilever footstock is fixed mutually, the display screen with the keyboard all with the cantilever footstock is fixed mutually, the MCU controller all with otter board tray elevating system come and go scraper mechanism laser component the display screen with keyboard electric connection.

Further, photosensitive resin is placed in the hopper.

Furthermore, the Z-axis mechanism comprises a Z-axis fixing frame and a Z-axis plate vertically connected with the Z-axis fixing frame; otter board tray elevating system includes Z axle guide rail, Z axle connecting plate, Z axle slider and drive arrangement, the symmetry is installed on the Z axle board the Z axle guide rail, Z axle connecting plate adaptation is installed in two between the Z axle guide rail, and Z axle connecting plate with install between the Z axle guide rail the Z axle slider, drive arrangement install in on the Z axle board and with the Z axle connecting plate is connected, the both ends of Z axle connecting plate all are provided with Z axle plumbing arm perpendicularly, the lower extreme of Z axle plumbing arm is provided with the otter board layer board, be provided with the otter board tray on the otter board layer board.

Further, the reciprocating scraper mechanism comprises X-axis guide rails arranged at two ends of the hopper, a vacuum scraper is arranged between the X-axis guide rails, two ends of the workbench are respectively provided with a synchronous rotating wheel belt connected with the vacuum scraper, a vacuum device is arranged in the rack, the vacuum device is connected with the vacuum scraper through a vacuum-pumping tube, and a vacuum generator is arranged on the vacuum-pumping tube.

Further, laser unit includes laser instrument, first light mirror, second light mirror, third removal light mirror and shakes the mirror, first light mirror be 45 contained angles set up in the front end of laser instrument, the second light mirror with first light mirror symmetry sets up, the third remove the light mirror including the moving motor and with the moving plate that the moving motor is connected and set up in third light mirror on the moving plate, the third light mirror with laser instrument parallel arrangement, shake the mirror set up in the rear end of third light mirror, just shake the mirror and face the hopper.

Furthermore, the driving device comprises a driving motor, a head twisting device and a screw rod, one end of the head twisting device is connected with the driving motor, the other end of the head twisting device is connected with the screw rod, and the screw rod is connected with the Z-axis connecting plate.

Further, still be provided with liquid level adjustment mechanism on the hopper, hydraulic pressure adjustment mechanism includes level sensor, step motor and balancing piece, level sensor set up in the upper end of hopper, step motor set up in the back of Z axial lamella, the balancing piece with step motor connects, just the balancing piece is located the top of hopper.

Further, the vacuum scraper includes scraper blade and with scraper blade integrated into one piece's scraper groove, the knife face is scraped for smooth to the bottom front end face in scraper groove and bottom rear end face, the side of workstation is provided with the spacing groove, the both ends in spacing groove are provided with limit switch, limit switch passes through the bolt fastening in the spacing inslot, one of scraper blade serve be provided with in limit switch assorted spacing response piece, be equipped with transparent observation window on the scraper groove.

Further, the periphery of frame is provided with ya keli shell, be provided with ya keli door plant on the ya keli shell, be provided with start button, scram button and stop button on the ya keli shell.

The invention has the beneficial effects that: because the invention includes the stander and work station set in said stander, the said work station is inlaid with the hopper, there are Z-axis mechanisms on the said work station, the front of the said Z-axis mechanism has otter board tray lifting mechanisms located above the said hopper, there are to-and-fro scraper mechanisms between both ends of the said hopper, the upper end of the said stander has laser assemblies, the laser of the said laser assembly faces the hopper, the said stander also has cantilever operation boxes, so the invention can guarantee the verticality fast by installing the otter board tray lifting mechanism on the said Z-axis mechanism directly, guarantee the positioning accuracy, and it is more convenient and swift to assemble compared with prior art, do not need professional to assemble smoothly; in addition, the laser assembly can adjust the aperture size of the laser beam formed in the vibrating mirror by adjusting the position of the third optical mirror, so that the requirements of various different processing precisions can be met; furthermore, the invention can adjust the position of the limit switch on the limit groove according to the size of the actual processed product, thereby adjusting the displacement distance of the vacuum scraper and improving the processing efficiency to the maximum extent.

Drawings

FIG. 1 is an external structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic view of the assembly of the hopper and the reciprocating scraper mechanism;

FIG. 4 is a schematic view of an assembly structure of a Z-axis mechanism and a mesh plate tray lifting mechanism;

FIG. 5 is a rear view of the Z-axis mechanism;

FIG. 6 is a schematic view of the construction of the vacuum doctor blade;

fig. 7 is a simplified diagram of laser propagation of a laser assembly.

Detailed Description

As shown in fig. 1 to 7, in the present embodiment, the present invention includes a frame 1 and a table 2 provided in the frame 1, a hopper 3 is embedded in the workbench 2, a Z-axis mechanism 4 is arranged on the workbench 2, a screen plate tray lifting mechanism 5 positioned above the hopper 3 is arranged on the front surface of the Z-axis mechanism 4, a reciprocating scraper mechanism 6 is arranged between the two ends of the hopper 3, a laser component 7 is arranged at the upper end of the frame 1, the laser of the laser component 7 is right opposite to the hopper 3, the frame 1 is also provided with a cantilever 81 operating box 8, the worktable 2 is formed by splicing four marbles, because the internal structure of the marble is uniform and is formed by long-term natural aging, the internal stress is completely disappeared, therefore, the coefficient of linear expansion of the marble is extremely small, the marble cannot deform, and the method is very suitable for occasions with high requirements on the movement precision of the scraper; meanwhile, the marble has the advantages of good rigidity, high hardness, strong wear resistance and long service life.

In this embodiment, the periphery of the rack 1 is provided with an acrylic shell 10, an acrylic door panel 101 is arranged on the acrylic shell 10, and a start button 102, an emergency stop button 103 and a stop button 104 are arranged on the acrylic shell 10.

In this embodiment, cantilever 81 control box 8 includes cantilever 81, cantilever footstock, display screen 82, keyboard 83 and MCU controller, the one end of cantilever 81 with frame 1 is fixed mutually, the other end of cantilever 81 with the cantilever footstock is fixed mutually, display screen 82 with keyboard 83 all with the cantilever footstock is fixed mutually, the MCU controller all with otter board tray elevating system 5 come and go scraper mechanism 6 laser subassembly 7 display screen 82 with keyboard 83 electric connection.

In this embodiment, the hopper 3 is filled with a photosensitive resin, which is a liquid photosensitive resin, has the characteristics of rapid curing, high molding precision, good surface effect, easy post-treatment and the like, and is suitable for manufacturing hand plate samples such as automobiles, medical instruments, electronic products, building models and the like; it should be noted that the photosensitive resin has odor and toxicity, and needs to be sealed, and light-shielding protection is needed to prevent premature polymerization.

In this embodiment, a level gauge is disposed in the hopper 3, a swing device connected to the hopper 3 is disposed at the bottom of the workbench, when the industrial sla laser 3D printer is assembled on site, it is difficult for workers to accurately ensure that bottom support legs of the industrial sla laser 3D printer are at the same height when assembling the industrial sla laser 3D printer, and since the photosensitive resin is liquid photosensitive resin with general fluidity, the photosensitive resin at four corners in the hopper 3 is not easily at the same height when assembling and debugging, in the conventional method, liquid level sensors are mounted at four corners in the hopper 3, the heights of the photosensitive resin at four corners in the hopper 3 are checked, and then the support legs are further debugged, so that the photosensitive resin at four corners in the hopper 3 is at the same height, which increases the assembling efficiency, the flatness of the photosensitive resin in the hopper 3 can be checked through the level gauge, and if the flatness does not reach the standard, the hopper 3 is slightly swung by adjusting the swing device, so that the flatness of the photosensitive resin in the hopper 3 is kept to a certain degree, the complex operation that the supporting legs are required to be adjusted in the traditional debugging and assembling process is avoided, the assembling efficiency is improved, and the processing precision is also ensured.

In this embodiment, the Z-axis mechanism 4 includes a Z-axis fixing frame 41 and a Z-axis plate 42 vertically connected to the Z-axis fixing frame 41, which is convenient to assemble and improve the installation efficiency, and can ensure the perpendicularity of the Z-axis mechanism and the worktable 2, so as not to affect the overall printing precision; the screen plate tray lifting mechanism 5 comprises Z-axis guide rails 51, Z-axis connecting plates 52, Z-axis sliders 53 and driving devices 54, the Z-axis guide rails 51 are symmetrically mounted on the Z-axis plate 42, the Z-axis connecting plates 52 are mounted between the two Z-axis guide rails 51 in an adaptive mode, the Z-axis sliders 53 are mounted between the Z-axis connecting plates 52 and the Z-axis guide rails 51, the driving devices 54 are mounted on the Z-axis plates 42 and connected with the Z-axis connecting plates 52, Z-axis vertical arms 55 are perpendicularly arranged at two ends of each Z-axis connecting plate 52, screen plate supporting plates 56 are arranged at the lower ends of the Z-axis vertical arms 55, screen plate trays 57 are arranged on the screen plate supporting plates 56, screen plates are fixed on the tray screen plates 57, the screen plate supporting plates 56 are fixed through screws on two sides, the screen plate trays 57 are guaranteed not to sag in long-term use, and the tray 57 can be guaranteed to be better and stable in the lifting process and not to change the vertical (ii) a The Z-axis mechanism 4 and the screen plate tray lifting mechanism 5 are matched for use, on one hand, the screen plate tray lifting mechanism can be directly assembled on site, a professional operator is not required to debug the screen plate tray lifting mechanism, the Z-axis mechanism 4 ensures the positioning precision, and the screen plate tray lifting mechanism 5 ensures the stability of equipment during printing, so that the precision of the screen plate tray lifting mechanism is higher, and the stability is better.

In this embodiment, the reciprocating scraper mechanism 6 includes X-axis guide rails 61 disposed at two ends of the hopper 3, a vacuum scraper 62 is disposed between the two X-axis guide rails 61, two ends of the working platform 2 are both provided with synchronous pulley belts connected to the vacuum scraper 62, a vacuum is disposed in the frame 1, the vacuum is connected to the vacuum scraper 62 through a vacuum tube, the vacuum tube is provided with a vacuum generator, the vacuum scraper 62 includes a scraper plate 621 and a scraper groove 622 integrally formed with the scraper plate 621, a front end surface and a rear end surface of the bottom of the scraper groove 622 are smooth scraper surfaces, a limit groove 623 is disposed at a side end of the working platform 2, two ends of the limit groove 623 are provided with limit switches 624, the limit switches 624 are fixed in the limit groove 623 through bolts, one end of the scraper plate 621 is provided with a limit induction block 625 matched with the limit switches 624, a transparent observation window 626 is arranged on the scraper groove 622, and the synchronous rotating wheel belt can drive the vacuum scraper 62 to reciprocate in the hopper 3 more stably, so that the stability and the processing precision of the liquid level plane of the resin are improved; the position of the limit switch 624 fixed on the limit groove 623 can be selected according to the size of a processed product, so that the movement time of the vacuum scraper 62 is reduced, and the production efficiency is improved; the vacuum pipe between the vacuum scraper 62 and the vacuum generator forms a suction effect, and the vacuum pipe between the vacuum pipe and the vacuum generator forms an air blowing effect, so that the pressure in the scraper groove 622 can be kept constant, and the effect of adsorbing photosensitive resin by the scraper groove 622 is improved and stabilized.

In this embodiment, the laser assembly 7 includes a laser 71, a first optical mirror 72, a second optical mirror 73, a third movable optical mirror 74 and a vibration mirror 75, the first optical mirror 72 is disposed at the front end of the laser 71 at an included angle of 45 °, the second optical mirror 73 is disposed symmetrically to the first optical mirror 72, the third movable optical mirror 74 includes a movable motor, a movable plate connected to the movable motor, and a third optical mirror disposed on the movable plate, the first optical mirror 72 and the second optical mirror 73 are both reflective mirrors, the third optical mirror is a beam expander, the third optical mirror is disposed parallel to the laser 71, the vibration mirror 75 is disposed at the rear end of the third optical mirror, the vibration mirror 75 faces the hopper 3, laser emitted from the laser 71 is reflected by the first optical mirror 72 to enter the second optical mirror 73, and then reflected by the second optical mirror 73 to enter the third optical mirror, then, the laser beam is transmitted into the vibrating mirror 75 through the third optical mirror, and finally, the laser beam is irradiated on the surface of the liquid photosensitive resin through the vibrating mirror 75, so that the moving plate can be driven by the moving motor to move, the position of the third optical mirror is adjusted, the laser beam forms laser beams with different apertures in the vibrating mirror 75, and the production requirements of various different processing precisions can be met.

In this embodiment, the driving device 54 includes a driving motor, a head twisting device and a lead screw, one end of the head twisting device is connected to the driving motor, the other end of the head twisting device is connected to the lead screw, and the lead screw is connected to the Z-axis connecting plate 52, so that the screen plate tray 57 can be more stable and accurate in the lifting process.

In this embodiment, the hopper 3 is further provided with a liquid level adjusting mechanism, the hydraulic adjusting mechanism includes a liquid level sensor 91, a stepping motor 92 and a balance block 93, the liquid level sensor 91 is disposed at the upper end of the hopper 3, the upper end of the hopper is provided with a rectangular frame located right below the liquid level sensor 91, the rectangular frame enables the liquid level sensor 91 to better monitor the liquid level of the photosensitive resin in the hopper 3, the stepping motor 92 is disposed at the back of the Z-axis plate 42, the balance block 93 is connected with the stepping motor 92, the balance block 93 is located above the hopper 3, the liquid level sensor 91 is a laser displacement sensor, the laser displacement sensor is used for monitoring the liquid level of the photosensitive resin in the hopper 3 in real time, and when the present invention is in operation, each layer is printed, the screen tray lifting mechanism 5 descends for a certain distance, so that when the liquid level of the photosensitive resin changes, and when the liquid level of the photosensitive resin in the hopper 3 is lower than a set value, the stepping motor 92 drives the balance weight 93 to extend into the hopper 3, so that the liquid level of the photosensitive resin rises, and when the laser displacement sensor monitors that the liquid level of the photosensitive resin in the hopper 3 reaches the set value, the stepping motor 92 stops working.

In this embodiment, be provided with the ultraviolet lamp in the frame, the ultraviolet lamp can carry out the secondary cure to the product that processes.

In this embodiment, the working principle of the present invention is as follows: according to the requirement of processing precision, the aperture of a laser beam is adjusted, then the laser beam is irradiated on the surface of the photosensitive resin through the vibrating mirror 75, then a processing path of a product is designed, then the laser beam can draw the shape of a first layer of an object on the surface of the photosensitive resin only by pressing a start button, then the mesh plate tray lifting mechanism 5 descends for a certain distance, a cured layer is immersed in the liquid resin, the height of the cured layer is lower than the height of the liquid level, and the liquid level at the edge of the cured layer forms a bulge under the action of the liquid surface tension because the descending distance is small, so when the smooth scraping knife surface of the front end surface of the vacuum scraper is scraped from the cured layer, the resin higher than the liquid level is shoveled by the knife edge, and the liquid level is kept consistent; on the other hand, because the solidified layer is lower than the liquid level and forms the pit after the otter board tray 57 descends, when the vacuum scraper 61 scrapes from the solidified layer, the liquid photosensitive resin in the scraper groove 622 falls into the pit under the action of gravity and is smoothed by the smooth scraper surface of the rear end face, so that the liquid level in the pit is flush with the liquid level of the trough 14, the flatness of the liquid level of the photosensitive resin is ensured, preparation is made for the next round of printing and scanning, and the processing is repeated until the printing and forming are finished, and then the product is taken out by a worker, and redundant resin is cleaned up and the supporting structure is removed.

The invention is applied to the technical field of 3D printers.

While the embodiments of the present invention have been described in terms of practical embodiments, they are not to be construed as limiting the meaning of the present invention, and modifications of the embodiments and combinations with other embodiments will be apparent to those skilled in the art in light of the present description.

Claims

1. An industry sla laser 3D printer which characterized in that: it includes frame (1) and set up in workstation (2) in frame (1), it has hopper (3) to embed on workstation (2), be provided with Z axle mechanism (4) on workstation (2), the front of Z axle mechanism (4) is provided with and is located otter board tray elevating system (5) of hopper (3) top, be provided with between the both ends of hopper (3) and come and go scraper mechanism (6), the upper end of frame (1) is provided with laser assembly (7), the laser of laser assembly (7) is facing hopper (3), still be provided with cantilever (81) control box (8) on frame (1).

2. The industrial sla laser 3D printer of claim 1, wherein: cantilever (81) control box (8) include cantilever (81), cantilever footstock, display screen (82), keyboard (83) and MCU controller, the one end of cantilever (81) with frame (1) is fixed mutually, the other end of cantilever (81) with the cantilever footstock is fixed mutually, display screen (82) with keyboard (83) all with the cantilever footstock is fixed mutually, the MCU controller all with otter board tray elevating system (5) come and go scraper mechanism (6) laser subassembly (7) display screen (82) with keyboard (83) electric connection.

3. The industrial sla laser 3D printer of claim 2, wherein: photosensitive resin is placed in the hopper (3).

4. The industrial sla laser 3D printer of claim 2, wherein: the Z-axis mechanism (4) comprises a Z-axis fixing frame (41) and a Z-axis plate (42) vertically connected with the Z-axis fixing frame (41); otter board tray elevating system (5) includes Z axle guide rail (51), Z axle connecting plate (52), Z axle slider (53) and drive arrangement (54), install on Z axle board (42) symmetry Z axle guide rail (51), Z axle connecting plate (52) adaptation is installed in two between Z axle guide rail (51), and Z axle connecting plate (52) with install between Z axle guide rail (51) Z axle slider (53), drive arrangement (54) install in on Z axle board (42) and with Z axle connecting plate (52) are connected, the both ends of Z axle connecting plate (52) all are provided with Z axle plumbing arm (55) perpendicularly, the lower extreme of Z axle plumbing arm (55) is provided with otter board layer board (56), be provided with otter board tray (57) on otter board layer board (56).

5. The industrial sla laser 3D printer of claim 2, wherein: the reciprocating scraper mechanism (6) comprises X-axis guide rails (61) arranged at two ends of the hopper (3), a vacuum scraper (62) is arranged between the two X-axis guide rails (61), two ends of the workbench (2) are respectively provided with a synchronous rotating belt connected with the vacuum scraper (62), a vacuum device is arranged in the rack (1), the vacuum device is connected with the vacuum scraper (62) through a vacuum pipe, and a vacuum generator is arranged on the vacuum pipe.

6. The industrial sla laser 3D printer of claim 2, wherein: laser subassembly (7) include laser instrument (71), first light mirror (72), second light mirror (73), third remove light mirror (74) and shake mirror (75), first light mirror (72) be 45 contained angles set up in the front end of laser instrument (71), second light mirror (73) with first light mirror (72) symmetry sets up, third remove light mirror (74) including the moving motor and with the moving plate that the moving motor is connected and set up in third light mirror on the moving plate, third light mirror with laser instrument (71) parallel arrangement, shake mirror (75) set up in the rear end of third light mirror, just shake mirror (75) and face hopper (3).

7. The industrial sla laser 3D printer of claim 4, wherein: the driving device (54) comprises a driving motor, a head twisting device and a screw rod, one end of the head twisting device is connected with the driving motor, the other end of the head twisting device is connected with the screw rod, and the screw rod is connected with the Z-axis connecting plate (52).

8. The industrial sla laser 3D printer of claim 4, wherein: still be provided with liquid level adjustment mechanism on hopper (3), hydraulic pressure adjustment mechanism includes level sensor (91), step motor (92) and balancing piece (93), level sensor (91) set up in the upper end of hopper (3), step motor (92) set up in the back of Z axial lamella (42), balancing piece (93) with step motor (92) are connected, just balancing piece (93) are located the top of hopper (3).

9. The industrial sla laser 3D printer of claim 5, wherein: vacuum scraper (62) including scraper blade (621) and scraper blade groove (622) with scraper blade (621) integrated into one piece, scraper blade groove (622), bottom preceding terminal surface and bottom rear end face for smooth scraper face, the side of workstation (2) is provided with spacing groove (623), the both ends of spacing groove (623) are provided with limit switch (624), limit switch (624) pass through the bolt fastening in spacing groove (623), one of scraper blade (621) serve be provided with in limit switch (624) assorted spacing response piece (625), be equipped with transparent observation window (626) on scraper blade groove (622).

10. The industrial sla laser 3D printer of claim 1, wherein: the periphery of frame (1) is provided with ya keli shell (10), be provided with ya keli door plant (101) on ya keli shell (10), be provided with start button (102), scram button (103) and stop button (104) on yakeli shell (10).