Light source adjusting device of laser 3D printer

Abstract

The application provides a light source adjusting device of a laser 3D printer, comprising a printer main body, a polarizing mirror, a laser, a moving table, a light beam blocking part and a protective channel; the polarizing mirror is arranged in the printer main body, the moving table is arranged on the side of the printer main body, the laser is arranged on the moving table, the light beam blocking part is arranged on the moving table and close to the laser, and the protective channel is arranged on the light beam blocking part. The light source adjusting device of the laser 3D printer effectively increases and improves the adjusting mode of the laser beam, protects the propagation process of the laser beam, greatly improves the printing efficiency and ensures the high-quality printing of the model.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing, in particular to a light source adjusting device of a laser 3D printer. BACKGROUND

[0002] The basic principle of light-curing 3D printing is to use ultraviolet lamps or laser beams to irradiate on special light-curing resin, so that the resin molecules chains increase in bonding strength under the irradiation of ultraviolet rays or laser beams, and gradually form a solid structure. When a layer of resin is completely cured, the printing platform will move up by one layer, and the above process will be repeated until the entire model is printed.

[0003] There are three common light-curing 3D printers, namely SLA, DLP and LCD light-curing; among them, the basic principle of SLA 3D printer forming is mainly to use a laser as a light source, and then use a galvanometer system to control the laser spot scanning. The laser beam will first draw an object shape on the surface of the liquid resin, and then the printing platform will be lowered by a certain distance, and then the platform will be immersed in the liquid resin. Repeat this process to form a solid print. So far, SLA is the only light-curing 3D printing technology that can print large-size models.

[0004] The curing speed of SLA 3D printing depends on the movement of the laser beam, but the existing SLA 3D printer has a low laser beam movement speed, so the printing speed of SLA is low, and the larger the model size, the slower the printing speed. In addition, because the resin that can be used for cationic photopolymerization is limited, the printing resolution of SLA depends on the size of the laser beam. The existing SLA 3D printer needs to replace different specifications of lasers and perform long-term debugging before printing as a new light source when printing with different resins or printing models with different precision requirements. It is extremely inconvenient in actual use, time-consuming and laborious, and seriously affects the printing efficiency. SUMMARY

[0005] The purpose of the present application is to provide a light source adjusting device of a laser 3D printer to solve the above problems.

[0006] In order to achieve the above purpose, the present application provides a light source adjusting device of a laser 3D printer, comprising: a printer main body, a polarizing mirror, a laser, a moving table, a light beam blocking part and a protective channel.

[0007] The polarizing mirror is arranged in the printer main body, the moving table is arranged on the side surface of the printer main body, the laser is arranged on the moving table, the light beam blocking part is arranged on the moving table and close to the laser, and the protective channel is arranged on the light beam blocking part.

[0008] The mobile base drives the laser to move in the horizontal and vertical directions, so that the laser moves quickly.

[0009] The light beam blocking part is adapted to rotate circumferentially to switch modes, so that the emission end of the laser is blocked to different degrees.

[0010] The protective channel is adapted to cover the laser beam emitted by the laser to protect the laser beam from fluctuation.

[0011] The side wall of the printer body is provided with a hole, and a guard plate is installed around the hole, wherein

[0012] The hole is adapted to pass through the side wall of the printer body, so that the laser can irradiate the polarizing mirror.

[0013] Further, the mobile base comprises a base plate, grooves, sliding blocks, a horizontal plate, a gas cylinder, a main connecting rod, side arms, a linear motor and a body vertical plate.

[0014] The base plate is arranged on the side of the printer body and closely attached to the printer body, the middle part of the base plate is raised, two grooves are arranged on the raised part of the base plate, two sliding blocks are movably arranged in the two grooves respectively, the horizontal plate is installed on the two sliding blocks, the gas cylinder is installed on the base plate, the main connecting rod is connected to the output shaft of the gas cylinder and extends in a curve, the two side arms are respectively installed on the two sides of the end of the main connecting rod, the other ends of the two side arms are connected to the horizontal plate, the linear motor is arranged on the horizontal plate, and the body vertical plate is installed on the mover of the linear motor.

[0015] The laser is arranged on the body vertical plate.

[0016] Further, the light beam blocking part comprises a positioning sheet, a mandrel, a bearing, a wheel disc, a first through hole and a second through hole.

[0017] The positioning sheet is installed on the side of the body vertical plate, the mandrel is installed on the positioning sheet, the wheel disc is installed on the mandrel through the bearing, and the first through hole and a plurality of second through holes are circumferentially arranged on the wheel disc.

[0018] The first through hole is aligned with and close to the emission end of the laser.

[0019] The diameters of the plurality of second through holes are sequentially decreased based on the first through hole.

[0020] Further, the light beam blocking part further comprises an end sleeve, a positioning rod, a bolt and an insertion block.

[0021] The end sleeve is installed at the tail of the mandrel, a plurality of positioning rods are circumferentially arranged on the side of the end sleeve, a plurality of insertion pins are movably arranged on the positioning rods respectively, a plurality of insertion blocks are circumferentially arranged on the side of the wheel disc, and the insertion blocks are located at the gaps between the first through holes and the second through holes.

[0022] A through hole is formed in each of the insertion blocks and can tightly cooperate with the insertion pin.

[0023] Further, the protective channel comprises elbow rods, a first annular column, a second annular column, and an air inlet pipe.

[0024] The two elbow rods are installed on the two positioning rods respectively, the first annular column and the second annular column are coaxially arranged, the first annular column is connected to the two elbow rods, and one end of the air inlet pipe penetrates through the first annular column.

[0025] The first annular column and the second annular column are coaxial with the first through hole, and the gap at the end of the first annular column and the second annular column close to the first through hole is closed.

[0026] Further, the light beam blocking part further comprises annular pads installed on the back of the wheel disc and located around the second through holes respectively.

[0027] The surfaces of the annular pads are smooth and arc-shaped.

[0028] Further, the moving table further comprises an inclined support installed on the main body vertical plate and abutting against the laser.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] The light source adjusting device of the laser 3D printer can load the laser and move quickly in the horizontal and vertical directions through the moving table, so as to ensure that the laser moves quickly according to the printing track, and then effectively improves the printing speed under the cooperation of the polarizing mirror.

[0031] The light source adjusting device of the laser 3D printer can quickly adjust the light beam emitted by the laser through the light beam blocking part to achieve different degrees of shielding, so as to obtain light spots of different sizes, and then ensure that different printing materials and printing precision can be met without replacing different specifications of lasers and debugging, which is convenient, fast and has high compatibility.

[0032] The light source adjustment device of this laser 3D printer can form a relatively sealed channel between the laser and the polarizing mirror through the protective channel, so as to allow the laser beam emitted by the laser to propagate. This achieves all-round protection of the laser beam, effectively preventing the laser beam from being disturbed by external impurities, thereby improving the printing quality.

[0033] The laser 3D printer's light source adjustment device effectively increases and improves the laser beam adjustment method and protects the laser beam propagation process, greatly improving printing efficiency while ensuring high-quality model printing. Attached Figure Description

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] Figure 1 A perspective view of the present invention is shown;

[0036] Figure 2 A perspective view of the invention from another angle is shown;

[0037] Figure 3 A first partial perspective view of the present invention is shown;

[0038] Figure 4 A second partial perspective view of the present invention is shown;

[0039] Figure 5 A partial front view of the present invention is shown;

[0040] Figure 6 A partial right view of the invention is shown;

[0041] Figure 7 The present invention is shown. Figure 2 Enlarged view of point A;

[0042] Figure 8 The present invention is shown. Figure 4 Enlarged view of point B.

[0043] In the figure, the same reference numerals represent the same structural element, wherein:

[0044] 1. Printer body; 2. Polarizing filter; 3. Laser; 4. Moving stage; 41. Base plate; 42. Groove; 43. Sliding block; 44. Horizontal plate; 45. Cylinder; 46. Main connecting rod; 47. Side arm; 48. Linear motor; 49. Main body upright plate; 491. Diagonal brace; 5. Beam shield; 51. Positioning plate; 52. Spindle; 53. Bearing; 54. Wheel; 55. First through hole; 56. Second through hole; 57. End sleeve; 58. Positioning rod; 59. Pin; 591. Insertion block; 592. Circular ring pad; 6. Protective channel; 61. Elbow rod; 62. First annular column; 63. Second annular column; 64. Air inlet pipe; 11. Hole; 12. Protective plate. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0046] Please see Figure 1 , Figure 1 A perspective view of the present invention is shown; please refer to [link / reference]. Figure 2 , Figure 2 A perspective view of the invention from another angle is shown; please refer to [link / reference]. Figure 3 , Figure 3 A first partial perspective view of the present invention is shown; please refer to [link / reference]. Figure 4 , Figure 4 A second partial perspective view of the invention is shown; please refer to [link / reference]. Figure 5 , Figure 5 A partial front view of the invention is shown; please refer to... Figure 6 , Figure 6 A partial right view of the invention is shown; please refer to [link / reference]. Figure 7 , Figure 7 The present invention is shown. Figure 2 Please refer to the enlarged view at point A; Figure 8 , Figure 8 The present invention is shown. Figure 4 Enlarged view of point B; as shown Figures 1-8 As shown, a light source adjustment device for a laser 3D printer includes: a printer body 1, a polarizing mirror 2, a laser 3, a moving stage 4, a beam shielding part 5, and a protective channel 6.

[0047] The polarizing mirror 2 is disposed inside the printer body 1, the moving stage 4 is disposed on the side of the printer body 1, the laser 3 is disposed on the moving stage 4, the beam shielding part 5 is disposed on the moving stage 4 and close to the laser 3, and the protective channel 6 is disposed on the beam shielding part 5.

[0048] The movement of the mobile platform 4 drives the laser 3 to move in the horizontal and vertical directions respectively, so as to quickly move the laser 3;

[0049] The light beam blocking part 5 is adapted to rotate circumferentially to switch modes, so that the emission end of the laser 3 is blocked to different degrees;

[0050] The protective channel 6 is adapted to cover the laser beam emitted by the laser 3 to protect the laser beam from fluctuation;

[0051] The side wall of the printer body 1 is provided with a hole 11, and a guard plate 12 is mounted around the hole 11, wherein

[0052] The hole 11 is adapted to pass through the side wall of the printer body 1, so that the laser 3 can irradiate the polarizing mirror 2, ensuring that the laser beam emitted by the laser 3 can normally propagate to the polarizing mirror 2, and then the polarizing mirror 2 selectively scans the laser beam on the liquid surface. The light source adjusting device of the laser 3D printer can load the laser 3 and quickly move in the horizontal and vertical directions through the mobile platform 4, so as to ensure that the laser 3 quickly moves according to the printing track, thereby effectively improving the printing speed under the cooperation of the polarizing mirror 2. The light beam blocking part 5 can quickly adjust to block the laser beam emitted by the laser 3 to different degrees, so as to obtain different sizes of light spots, thereby ensuring that different printing materials and printing precision can be met without replacing different specifications of the laser 3 and debugging, which is convenient, fast and has high compatibility. The protective channel 6 can form a relatively closed channel between the laser 3 and the polarizing mirror 2 for the laser beam emitted by the laser 3 to propagate, so as to realize all-round protection of the laser beam, effectively prevent the laser beam from being affected by external impurities and appearing disorder, and thereby improve the printing quality. The light source adjusting device of the laser 3D printer effectively increases and improves the adjustment mode of the laser beam, and protects the propagation process of the laser beam, which greatly improves the printing efficiency while ensuring the high-quality printing of the model.

[0053] Optionally, the mobile platform 4 comprises a base plate 41, a groove 42, a sliding block 43, a horizontal plate 44, a gas cylinder 45, a main connecting rod 46, a side arm 47, a linear motor 48 and a main body vertical plate 49;

[0054] The base plate 41 is arranged on the side of the printer body 1 and closely attached to the printer body 1, and the middle of the base plate 41 is raised, two grooves 42 are arranged on the raised part of the base plate 41, two sliding blocks 43 are movably arranged in the two grooves 42 respectively, the cross plate 44 is installed on the two sliding blocks 43, the air cylinder 45 is installed on the base plate 41, the main connecting rod 46 is connected to the output shaft of the air cylinder 45 and extends in a curve, two side arms 47 are respectively installed on the two sides of the end of the main connecting rod 46, the other ends of the two side arms 47 are connected to the cross plate 44, the linear motor 48 is arranged on the cross plate 44, and the body vertical plate 49 is installed on the mover of the linear motor 48;

[0055] The laser 3 is arranged on the body vertical plate 49, and drives the air cylinder 45 and the linear motor 48 during printing, pulls the cross plate 44 in the two grooves 42 through the main connecting rod 46 and the two side arms 47, and at the same time, the mover of the linear motor 48 starts to move to directly drive the body vertical plate 49, so as to realize the movement of the laser 3 in the horizontal direction and the vertical direction respectively, greatly improve the movement speed of the laser beam on the polarizing mirror 2, and effectively improve the printing speed. When printing a large outline of a model, the light spot is adjusted to the maximum through the light beam blocking part 5, and at the same time, the laser 3 is driven to move quickly according to the printing track through the moving table 4. When printing details of the model, a small light spot is used and the movement speed of the laser 3 is reduced, so as to ensure the printing speed and the printing quality of the model.

[0056] Optionally, the light beam blocking part 5 includes a positioning piece 51, a mandrel 52, a bearing 53, a wheel disc 54, a first through hole 55 and a second through hole 56.

[0057] The positioning piece 51 is installed on the side of the body vertical plate 49, the mandrel 52 is installed on the positioning piece 51, the wheel disc 54 is installed on the mandrel 52 through the bearing 53, and the first through hole 55 and a plurality of second through holes 56 are circumferentially arranged on the wheel disc 54.

[0058] The first through hole 55 is aligned with and close to the emitting end of the laser 3;

[0059] The diameters of the plurality of second through holes 56 are sequentially reduced based on the diameter of the first through hole 55. When the printing material and the printing precision change, the wheel disc 54 is rotated, and a second through hole 56 with a suitable diameter is selected according to the actual situation to align with the emitting end of the laser 3. The edge of the laser beam is blocked by the second through hole 56 with a changed diameter, so that the laser beam becomes appropriate size after passing through the corresponding second through hole 56, thereby realizing the change of the light spot size, quickly obtaining a light spot that can meet the current printing situation, and ensuring high efficiency and speed.

[0060] Optionally, the light beam blocking part 5 further comprises an end sleeve 57, a positioning rod 58, a plug 59 and a penetrating block 591;

[0061] The end sleeve 57 is installed at the tail of the mandrel 52, a plurality of positioning rods 58 are circumferentially arranged on the side of the end sleeve 57, a plurality of plugs 59 are movably arranged on the positioning rods 58 respectively, a plurality of penetrating blocks 591 are circumferentially arranged on the side of the wheel disc 54, and the penetrating blocks 591 are located at the gaps between the first through holes 55 and the second through holes 56;

[0062] A through hole is formed on each of the penetrating blocks 591, which can tightly cooperate with the plug 59. After rotating the wheel disc 54 to change the alignment of different second through holes 56 to the emitting end of the laser 3, the penetrating blocks 591 change positions and correspond to the positioning rods 58 again. After selecting a second through hole 56 with a suitable diameter to align the emitting end of the laser 3 during printing, the plug 59 at the corresponding position is pushed into the corresponding penetrating block 591, thereby fixing the wheel disc 54. This allows the wheel disc 54 to stably stay at the current position, thereby preventing the wheel disc 54 from moving undesirably through the bearing 53, causing the second through hole 56 to incorrectly block the laser beam, and further ensuring the stability of the laser beam and the printing process. When it is necessary to change the first through hole 55 or the second through hole 56 again, the plug 59 is removed to restore the flexible rotation of the wheel disc 54.

[0063] Optionally, the protective channel 6 comprises an elbow rod 61, a first annular column 62, a second annular column 63 and an air inlet pipe 64;

[0064] Two elbow rods 61 are respectively installed on two positioning rods 58, the first annular column 62 and the second annular column 63 are coaxially arranged, and the first annular column 62 is connected to the two elbow rods 61, one end of the air inlet pipe 64 passes through the first annular column 62, and the other end of the air inlet pipe 64 is connected to the blowing port of an external air blower. When the printer body 1 starts printing, the external air blower is started to blow air, and then the air is introduced into the gap between the first annular column 62 and the second annular column 63 through the air inlet pipe 64, so that the air is blown forward along the gap between the first annular column 62 and the second annular column 63, forming a ring-shaped air curtain that wraps the laser beam. This allows the laser beam to be relatively closed between the emitting end of the laser 3 and the polarizing mirror 2, thereby preventing external floating dust and other impurities from entering and affecting the irradiation of the laser beam, ensuring high-quality printing of the model;

[0065] The first annular column 62 and the second annular column 63 are coaxial with the first through hole 55, ensuring that the laser beam can pass through the second annular column 63 no matter which second through hole 56 is exchanged and aligned with the laser 3, and the gap near the end of the first annular column 62 and the second annular column 63 is closed to prevent wind from leaking out of the tail of the first annular column 62 and the second annular column 63, ensuring the strength of the annular air curtain formed in front of the first annular column 62 and the second annular column 63, and ensuring the protection effect on the laser beam.

[0066] Optionally, the light beam blocking part 5 further comprises a circular ring pad 592 installed on the back of the wheel disc 54 and located around each second through hole 56;

[0067] The surface of each circular ring pad 592 is smooth and arc-shaped, ensuring that when each second through hole 56 is aligned with the laser 3, the corresponding circular ring pad 592 can reflect the laser beam blocked by the second through hole 56 at a certain angle, preventing the blocked laser beam from being reflected linearly back to the emission end of the laser 3, causing the laser beam to be disturbed, thereby ensuring the quality of the laser beam and providing protection for high-quality printing of the model.

[0068] Optionally, the moving table 4 further comprises an inclined support 491 installed on the main body vertical plate 49 and abutting against the laser 3, which is pushed up after the laser 3 is installed to abut tightly, thereby using the inclined support 491 to lift and fix the laser 3 upward, making the laser 3 more stable and avoiding shaking during printing.

[0069] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A light source adjustment device of a laser 3D printer, characterized by, The utility model relates to a laser 3D printer's light source adjusting device, including: Printer main part (1), polarizer (2), laser (3), mobile station (4), light beam baffle part (5) and protective channel (6); The polarizer (2) is arranged in the printer main part (1), the mobile station (4) is arranged on the side of the printer main part (1), the laser (3) is arranged on the mobile station (4), the light beam baffle part (5) is arranged on the mobile station (4) and is close to the laser (3), the protective channel (6) is arranged on the light beam baffle part (5), wherein Drive the mobile station (4) can drive the laser (3) moves in horizontal direction respectively, to make the laser (3) fast movement; The light beam baffle part (5) is suitable for circumferential rotation and is switched to the mode, to make the emission end of the laser (3) is shielded to different degrees; The protective channel (6) is suitable for the laser beam of the laser (3) emission is covered, to protect the laser beam and avoid its emergence fluctuation; The side wall of printer main part (1) is opened with hole (11), and the hole (11) is installed with the fender (12) around, wherein The hole (11) is suitable for the side wall of the printer main part (1) and is opened, to make the laser (3) can irradiate the polarizer (2); The light beam baffle part (5) includes positioning sheet (51), mandrel (52), bearing (53), wheel disc (54), first through hole (55) and second through hole (56); The mandrel (52) is installed on the positioning sheet (51), the wheel disc (54) is installed on the mandrel (52) through the bearing (53), the first through hole (55) and a plurality of second through holes (56) are circumferentially provided on the wheel disc (54); The first through hole (55) is aligned and close to the emission end of the laser (3); The diameter of a plurality of second through holes (56) is sequentially decreased based on the first through hole (55); The light beam baffle part (5) further includes circular ring pad (592) installed on the back of the wheel disc (54) and respectively located around a plurality of second through holes (56); A plurality of circular ring pads (592) are smooth and arc-shaped on the surface.

2. The laser 3D printer's light source adjusting device of claim 1, wherein The mobile station (4) includes base plate (41), groove (42), sliding block (43), horizontal plate (44), air cylinder (45), main connecting rod (46), side arm (47), linear motor (48) and main body vertical plate (49). The base plate (41) is arranged on the side of the printer body (1) and closely attached to the printer body (1), and the middle of the base plate (41) is raised, two grooves (42) are arranged on the raised part of the base plate (41), two sliding blocks (43) are movably arranged in the two grooves (42) respectively, the cross plate (44) is installed on the two sliding blocks (43), the air cylinder (45) is installed on the base plate (41), the main connecting rod (46) is connected to the output shaft of the air cylinder (45) and extends in a curved manner, two side arms (47) are respectively installed at both sides of the end of the main connecting rod (46), the other ends of the two side arms (47) are connected to the cross plate (44), the linear motor (48) is arranged on the cross plate (44), and the body vertical plate (49) is installed on the mover of the linear motor (48). The laser (3) is arranged on the body vertical plate (49).

3. The light source adjusting device of the laser 3D printer according to claim 2, wherein The positioning sheet (51) is installed on the side of the body vertical plate (49).

4. The light source adjusting device of the laser 3D printer according to claim 3, wherein The light beam blocking part (5) further comprises an end sleeve (57), a positioning rod (58), a plug (59) and a penetrating block (591). The end sleeve (57) is installed at the tail of the mandrel (52), a plurality of positioning rods (58) are circumferentially arranged on the side of the end sleeve (57), a plurality of plugs (59) are movably arranged on the plurality of positioning rods (58) respectively, and a plurality of penetrating blocks (591) are circumferentially arranged on the side of the wheel disc (54), and the plurality of penetrating blocks (591) are located at the gap between the first through hole (55) and the plurality of second through holes (56). A plurality of through holes are formed in the plurality of penetrating blocks (591) and can tightly match the plugs (59).

5. The light source adjusting device of the laser 3D printer according to claim 4, wherein The protective channel (6) comprises an elbow rod (61), a first annular column (62), a second annular column (63) and an air inlet pipe (64). Two elbow rods (61) are respectively installed on two positioning rods (58), the first annular column (62) and the second annular column (63) are coaxially arranged, the first annular column (62) is connected to the two elbow rods (61), and one end of the air inlet pipe (64) penetrates through the first annular column (62). The first annular column (62) and the second annular column (63) are coaxial with the first through hole (55), and the gap near the end of the first annular column (62) and the second annular column (63) close to the first through hole (55) is closed.

6. The light source adjusting device of the laser 3D printer according to claim 5, wherein The mobile station (4) further comprises a diagonal strut (491) mounted on the main upright (49) and in abutment with the laser (3).

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