Light source adjusting device of laser 3D printer

Abstract

The invention provides a light source adjusting device of a laser 3D printer. The light source adjusting device comprises a printer body, a polarizer, a laser, a moving table, a light beam shielding part and a protective channel. The polarizer is arranged in the printer body, the moving table is arranged on the side face of the printer body, the laser device is arranged on the moving table, the light beam blocking and shielding part is arranged on the moving table and is close to the laser device, and the protective channel is arranged on the light beam blocking and shielding part. According to the light source adjusting device of the laser 3D printer, the adjusting mode of the laser beam is effectively increased and improved, the propagation process of the laser beam is protected, and high-quality printing of a model is ensured while the printing efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a light source adjustment device for a laser 3D printer. Background Art

[0002] The basic principle of photocuring 3D printing is to use ultraviolet light or laser beam to irradiate special photocurable resin, so that it will undergo chemical reaction under the irradiation of ultraviolet light or laser beam, and the bond strength between the resin molecular chains will increase, gradually forming a solid structure. When a layer of resin is completely cured, the printing platform will move up a layer, and the above process will be repeated until the entire model is printed.

[0003] There are three common types of photocuring 3D printers, namely SLA, DLP and LCD photocuring. Among them, the basic principle of SLA 3D printer molding is to use laser as the 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 drop a certain distance, and then let the platform immerse in the liquid resin, and repeat this process to form a solid print. So far, SLA is the only photocuring 3D printing technology that can print large-size models.

[0004] The curing speed of SLA3D printing depends on the movement of the laser beam, but the laser beam movement speed of existing SLA3D printers is low, which leads to a low SLA printing speed. The larger the model size, the slower the printing speed. In addition, since the resins that can be used for cationic photopolymerization are limited, the printing resolution of SLA depends on the size of the laser beam. When existing SLA3D printers use different resins for printing or print models with different precision requirements, they need to replace lasers of different specifications and perform long-term debugging before printing as a new light source. This is extremely inconvenient, time-consuming and labor-intensive in actual use, and seriously affects printing efficiency. Summary of the invention

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

[0006] In order to achieve the above-mentioned object, the present invention provides a light source adjustment device for a laser 3D printer, comprising: a printer body, a polarizer, a laser, a moving platform, a beam shielding portion and a protective channel; The polarizer is arranged in the printer body, the movable platform is arranged on the side of the printer body, the laser is arranged on the movable platform, the beam shielding part is arranged on the movable platform and close to the laser, and the protective channel is arranged on the beam shielding part, wherein After the moving platform is driven, the laser can be driven to move in the horizontal and vertical directions respectively, so that the laser can move quickly; The beam shielding portion is suitable for rotating circumferentially to switch its shape, so that the emission end of the laser is shielded to different degrees; The protective channel is suitable for covering the laser beam emitted by the laser to protect the laser beam from fluctuation; The side wall of the printer body is provided with a hole, and a guard plate is installed around the hole, wherein The hole is adapted to penetrate through the side wall of the printer body so that the laser can illuminate the polarizer.

[0007] Further, the mobile platform includes a base plate, a groove, a sliding block, a cross plate, a cylinder, a main connecting rod, a side arm, a linear motor and a main body vertical plate; The base plate is arranged on the side of the printer body and is tightly attached to the printer body, and the middle part of the base plate is raised, and the two grooves are arranged at intervals on the raised part of the base plate, and the two sliding blocks are respectively movably arranged in the two grooves, the cross plate is installed on the two sliding blocks, the cylinder is installed on the base plate, the main connecting rod is connected to the output shaft of the cylinder and extends in a bent manner, one end of the two side arms is respectively installed on both sides of the end of the main connecting rod, and the other ends of the two side arms are connected to the cross plate, the linear motor is arranged on the cross plate, and the main body vertical plate is installed on the mover of the linear motor; The laser is arranged on the main body vertical plate.

[0008] Furthermore, the beam shielding portion includes a positioning piece, a core shaft, a bearing, a wheel disc, a first through hole and a second through hole; The positioning piece is installed on the side of the main body vertical plate, the core shaft is installed on the positioning piece, the wheel disc is installed on the core shaft through the bearing, and the first through hole and a plurality of the second through holes are circumferentially arranged on the wheel disc; The first through hole is aligned with and close to the emitting end of the laser; The diameters of the plurality of second through holes decrease in sequence based on the diameters of the first through holes.

[0009] Furthermore, the beam shielding portion further comprises an end sleeve, a positioning rod, a latch and an interpenetrating block; 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 latches are movably arranged on the plurality of positioning rods, a plurality of insertion blocks are circumferentially arranged on the side of the wheel disc, and a plurality of insertion blocks are located at the gaps between the first through holes and a plurality of the second through holes; A plurality of the insertion blocks are provided with through holes which can be closely matched with the latch pins.

[0010] Furthermore, the protective channel includes an elbow rod, a first annular column, a second annular column and an air inlet pipe; The two elbow rods are respectively installed on the two positioning rods, the first annular column and the second annular column are coaxially arranged, and the first annular column is connected to the two elbow rods, and one end of the air inlet pipe passes through the first annular column; The first annular column and the second annular column are coaxial with the first through hole, and a gap between the first annular column and the second annular column near one end of the first through hole is sealed.

[0011] Furthermore, the beam shielding portion further comprises an annular pad installed on the back of the wheel disc and respectively located around a plurality of the second through holes; The surfaces of the plurality of circular ring pads are smooth and arc-shaped.

[0012] Furthermore, the movable platform also includes a diagonal support installed on the main body vertical plate and abutting against the laser.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The light source adjustment device of the laser 3D printer can load the laser and perform rapid horizontal and vertical movements through the moving platform, thereby ensuring that the laser moves rapidly according to the printing track, and then effectively improving the printing speed with the cooperation of the polarizing filter; The light source adjustment device of the laser 3D printer can achieve different degrees of shielding of the laser beam emitted by the laser through the beam shielding part through rapid adjustment, so as to obtain light spots of different sizes, thereby ensuring that different printing materials and printing accuracies can be met without replacing lasers of different specifications and debugging, which is convenient, fast and highly compatible; The light source adjustment device of the laser 3D printer can form a relatively closed channel between the laser and the polarizer through a protective channel for the laser beam emitted by the laser to propagate, thereby achieving all-round protection of the laser beam, effectively preventing the laser beam from being affected by external impurities and becoming disordered, thereby improving the printing quality; The light source adjustment device of the laser 3D printer effectively increases and improves the adjustment method of the laser beam and protects the propagation process of the laser beam, thereby greatly improving the printing efficiency and ensuring high-quality printing of the model. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 A perspective view of the present invention is shown; Figure 2 A perspective view of the present invention at another angle is shown; Figure 3 A first partial perspective view of the present invention is shown; Figure 4 A second partial perspective view of the present invention is shown; Figure 5 A partial front view of the present invention is shown; Figure 6 A partial right side view of the present invention is shown; Figure 7 The present invention is shown Figure 2 A magnified image of point A; Figure 8 The present invention is shown Figure 4 Enlarged view of point B.

[0016] In the figures, the same reference numerals denote the same structural elements, wherein: 1. Printer body; 2. Polarizer; 3. Laser; 4. Moving table; 41. Base plate; 42. Groove; 43. Sliding block; 44. Cross plate; 45. Cylinder; 46. Main connecting rod; 47. Side arm; 48. Linear motor; 49. Main vertical plate; 491. Diagonal brace; 5. Beam shielding part; 51. Positioning plate; 52. Mandrel; 53. Bearing; 54. Wheel; 55. First through hole; 56. Second through hole; 57. End sleeve; 58. Positioning rod; 59. Latch; 591. Insert block; 592. Circular ring pad; 6. Protective channel; 61. Elbow rod; 62. First annular column; 63. Second annular column; 64. Air inlet pipe; 11. Holes; 12. Guard plate. DETAILED DESCRIPTION

[0017] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0018] See also Figure 1 , Figure 1 A perspective view of the present invention is shown; see Figure 2 , Figure 2 Shows a three-dimensional view of the present invention at another angle; see Figure 3 , Figure 3 A first partial perspective view of the present invention is shown; see Figure 4 , Figure 4 A second partial perspective view of the present invention is shown; see Figure 5 , Figure 5 Shows a partial front view of the present invention; see Figure 6 , Figure 6A partial right side view of the present invention is shown; see Figure 7 , Figure 7 The present invention is shown Figure 2 See the enlarged view of point A in Figure 8 , Figure 8 The present invention is shown Figure 4 The enlarged view of point B; Figure 1-8 As shown, a light source adjustment device for a laser 3D printer includes: a printer body 1, a polarizer 2, a laser 3, a moving platform 4, a beam shielding portion 5 and a protective channel 6; The polarizer 2 is arranged in the printer body 1, the movable platform 4 is arranged on the side of the printer body 1, the laser 3 is arranged on the movable platform 4, the beam shielding portion 5 is arranged on the movable platform 4 and close to the laser 3, and the protective channel 6 is arranged on the beam shielding portion 5, wherein After the moving platform 4 is driven, the laser 3 can be driven to move in the horizontal and vertical directions respectively, so that the laser 3 can move quickly; The beam shielding portion 5 is suitable for rotating circumferentially to switch its shape, so that the emission end of the laser 3 is shielded to different degrees; The protective channel 6 is suitable for covering the laser beam emitted by the laser 3 to protect the laser beam from fluctuations; The side wall of the printer body 1 is provided with a hole 11, and a guard plate 12 is installed around the hole 11. The hole 11 is suitable for opening the side wall of the printer body 1 so that the laser 3 can irradiate the polarizer 2, ensuring that the laser beam emitted by the laser 3 can be normally transmitted to the polarizer 2, and then the polarizer 2 selectively scans the laser beam on the liquid surface. The light source adjustment device of the laser 3D printer can load the laser 3 through the moving platform 4 and perform rapid horizontal and vertical movements, thereby ensuring that the laser 3 moves rapidly according to the printing trajectory, and then effectively improves the printing speed with the cooperation of the polarizer 2. The beam shielding part 5 can be quickly adjusted to achieve different degrees of shielding of the laser beam emitted by the laser 3, thereby obtaining different The size of the light spot can ensure that different printing materials and printing accuracy can be met without replacing the laser 3 of different specifications and debugging. It is convenient, fast and highly compatible. A relatively closed channel can be formed between the laser 3 and the polarizer 2 through the protective channel 6 for the laser beam emitted by the laser 3 to propagate, thereby realizing all-round protection of the laser beam, effectively preventing the laser beam from being affected by external impurities and becoming disordered, thereby improving the printing quality. The light source adjustment device of the laser 3D printer effectively increases and improves the adjustment method of the laser beam, and protects the propagation process of the laser beam, thereby greatly improving the printing efficiency and ensuring high-quality printing of the model.

[0019] Optionally, the mobile platform 4 includes a base plate 41, a groove 42, a sliding block 43, a cross plate 44, a cylinder 45, a main connecting rod 46, a side arm 47, a linear motor 48 and a main body vertical plate 49; The base plate 41 is arranged on the side of the printer body 1 and is closely attached to the printer body 1, and the middle part of the base plate 41 is convex, and the two grooves 42 are arranged at intervals on the convex part of the base plate 41, and the two sliding blocks 43 are respectively movably arranged in the two grooves 42, the cross plate 44 is installed on the two sliding blocks 43, the cylinder 45 is installed on the base plate 41, the main connecting rod 46 is connected to the output shaft of the cylinder 45 and extends in a bent manner, one end of the two side arms 47 is respectively installed on both sides of the end of the main connecting rod 46, and 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 main body vertical plate 49 is installed on the mover of the linear motor 48; The laser 3 is arranged on the main vertical plate 49, and drives the cylinder 45 and the linear motor 48 during the printing process, and pulls the cross plate 44 in the two grooves 42 through the main connecting rod 46 and the two side arms 47. At the same time, the mover of the linear motor 48 starts to move and directly drives the main vertical plate 49, so that the laser 3 can be moved in the horizontal and vertical directions respectively, thereby greatly improving the moving speed of the laser beam on the polarizer 2, so that the printing speed is effectively improved. When printing the large outline of the model, the light spot is adjusted to the maximum through the beam blocking part 5, and the laser 3 is driven by the moving table 4 to move quickly along the printing trajectory. When printing the details of the model, a small light spot is used and the moving speed of the laser 3 is reduced, so as to ensure the printing speed and the printing quality of the model.

[0020] Optionally, the beam shielding portion 5 includes a positioning piece 51, a core shaft 52, a bearing 53, a wheel disc 54, a first through hole 55 and a second through hole 56; The positioning piece 51 is installed on the side of the main body vertical plate 49, the core shaft 52 is installed on the positioning piece 51, the wheel disc 54 is installed on the core shaft 52 through the bearing 53, and the first through hole 55 and a plurality of the second through holes 56 are circumferentially arranged on the wheel disc 54; The first through hole 55 is aligned with and close to the emission end of the laser 3; The diameters of the second through holes 56 decrease in sequence on the basis of the first through holes 55. When the printing material and the printing accuracy change, the wheel 54 is rotated and the second through holes 56 with appropriate diameters are selected according to the actual situation to align with the emission end of the laser 3. The edges of the laser beam are blocked by the second through holes 56 with changed diameters, so that the laser beam becomes a suitable size after passing through the corresponding second through holes 56, thereby realizing the change of the spot size, and quickly obtaining a spot that meets the current printing situation, ensuring high efficiency and speed.

[0021] Optionally, the beam shielding portion 5 further includes an end sleeve 57, a positioning rod 58, a latch pin 59 and an insertion block 591; The end sleeve 57 is installed at the tail of the core shaft 52, a plurality of positioning rods 58 are circumferentially arranged on the side of the end sleeve 57, a plurality of latches 59 are movably arranged on the plurality of positioning rods 58, a plurality of insertion blocks 591 are circumferentially arranged on the side of the wheel disc 54, and the plurality of insertion blocks 591 are located at the gaps between the first through holes 55 and the plurality of second through holes 56; Several of the insertion blocks 591 are provided with through holes that can closely match the pins 59. After rotating the wheel 54 to replace different second through holes 56 to align with the emission end of the laser 3, several insertion blocks 591 change their positions and correspond to several positioning rods 58 again. When printing, after selecting the second through hole 56 with a suitable diameter to align with the emission end of the laser 3, the pins 59 at the corresponding positions are pushed into the corresponding insertion blocks 591 to fix the wheel 54, so that the wheel 54 can stay stably in the current position, thereby preventing the wheel 54 from being unnecessarily offset through the bearing 53 during the printing process, causing the second through hole 56 to incorrectly block the laser beam, thereby ensuring the stability of the laser beam and the printing process. When it is necessary to replace the first through hole 55 or the second through hole 56 again, the pin 59 is taken out to restore the flexible rotation of the wheel 54.

[0022] Optionally, the protective channel 6 includes an elbow rod 61, a first annular column 62, a second annular column 63 and an air inlet pipe 64; The two elbow rods 61 are respectively mounted on the 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 air outlet of the external blower. When the printer body 1 starts printing, the external blower is started to start blowing air, and then the air is guided 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 an annular wind curtain, wrapping the laser beam inside, so that the laser beam is relatively sealed between the emitting end of the laser 3 and the polarizer 2, thereby preventing impurities such as floating dust from the outside from entering and affecting the irradiation of the laser beam, thereby ensuring high-quality printing of the model; The first annular column 62 and the second annular column 63 are coaxial with the first through hole 55, ensuring that no matter which second through hole 56 is replaced to be aligned with the laser 3, the laser beam can pass through the second annular column 63 without obstruction, and the gap between the first annular column 62 and the second annular column 63 near one end of the first through hole 55 is sealed to prevent wind from leaking from the tail of the first annular column 62 and the second annular column 63, thereby ensuring the strength of the annular wind curtain formed in front of the first annular column 62 and the second annular column 63 and ensuring the protective effect on the laser beam.

[0023] Optionally, the beam shielding portion 5 further includes an annular pad 592 mounted on the back of the wheel 54 and respectively located around a plurality of the second through holes 56; The surfaces of the several circular ring pads 592 are smooth and arc-shaped, ensuring that when the several second through holes 56 are aligned with the laser 3, the corresponding circular ring pads 592 can reflect the laser beam blocked by the second through holes 56 at a certain angle, preventing the blocked laser beam from being reflected straight back to the emission end of the laser 3 to cause laser beam disorder, thereby ensuring the quality of the laser beam and providing guarantee for high-quality printing of the model.

[0024] Optionally, the movable platform 4 also includes an inclined support 491 installed on the main vertical plate 49 and abutting against the laser 3. After the laser 3 is installed, the inclined support 491 is pushed up to press it tightly, so that the laser 3 is lifted upward and fixed by the inclined support 491, making the laser 3 more stable and avoiding shaking during printing.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A light source adjustment device for a laser 3D printer, characterized in that: include: A printer body (1), a polarizer (2), a laser (3), a moving platform (4), a beam shielding portion (5), and a protective channel (6); The polarizer (2) is arranged in the printer body (1), the movable platform (4) is arranged on the side of the printer body (1), the laser (3) is arranged on the movable platform (4), the beam shielding portion (5) is arranged on the movable platform (4) and close to the laser (3), and the protective channel (6) is arranged on the beam shielding portion (5), wherein After the moving platform (4) is driven, the laser (3) can be driven to move in the horizontal and vertical directions, respectively, so that the laser (3) can move quickly; The beam shielding portion (5) is suitable for rotating circumferentially to switch its shape, so that the emission end of the laser (3) is shielded to different degrees; The protective channel (6) is suitable for covering the laser beam emitted by the laser (3) to protect the laser beam from fluctuations; The side wall of the printer body (1) is provided with a hole (11), and a protective plate (12) is installed around the hole (11), wherein The hole (11) is suitable for punching through the side wall of the printer body (1) so that the laser (3) can illuminate the polarizer (2).

2. A light source adjustment device for a laser 3D printer as claimed in claim 1, characterized in that: The movable platform (4) comprises a base plate (41), a groove (42), a sliding block (43), a transverse plate (44), a cylinder (45), a main connecting rod (46), a side arm (47), a linear motor (48) and a main body vertical plate (49); The base plate (41) is arranged on the side of the printer body (1) and is closely attached to the printer body (1), and the middle part of the base plate (41) is raised, and the two grooves (42) are arranged at intervals on the raised part of the base plate (41), and the two sliding blocks (43) are respectively movably arranged in the two grooves (42), the transverse plate (44) is installed on the two sliding blocks (43), the cylinder (45) is installed on the base plate (41), the main connecting rod (46) is connected to the output shaft of the cylinder (45) and extends in a bent manner, one end of the two side arms (47) is respectively installed on both sides of the end of the main connecting rod (46), and the other ends of the two side arms (47) are connected to the transverse plate (44), the linear motor (48) is arranged on the transverse plate (44), and the main body vertical plate (49) is installed on the mover of the linear motor (48); The laser (3) is arranged on the main body vertical plate (49).

3. A light source adjustment device for a laser 3D printer as claimed in claim 2, characterized in that: The light beam blocking portion (5) comprises a positioning piece (51), a core shaft (52), a bearing (53), a wheel disc (54), a first through hole (55) and a second through hole (56); The positioning plate (51) is mounted on a side surface of the main body vertical plate (49), the core shaft (52) is mounted on the positioning plate (51), the wheel disc (54) is mounted on the core shaft (52) via the bearing (53), and the first through hole (55) and a plurality of the second through holes (56) are circumferentially arranged on the wheel disc (54); The first through hole (55) is aligned with and close to the emission end of the laser (3); The diameters of the plurality of second through holes (56) decrease in sequence based on the diameters of the first through holes (55).

4. A light source adjustment device for a laser 3D printer as claimed in claim 3, characterized in that: The light beam blocking portion (5) further comprises an end sleeve (57), a positioning rod (58), a latch pin (59) and a penetration block (591); The end sleeve (57) is mounted on the tail of the core shaft (52), a plurality of positioning rods (58) are circumferentially arranged on the side of the end sleeve (57), a plurality of latches (59) are movably arranged on the plurality of positioning rods (58), a plurality of insertion blocks (591) are circumferentially arranged on the side of the wheel disc (54), and the plurality of insertion blocks (591) are located in the gaps between the first through holes (55) and the plurality of second through holes (56); A plurality of the insertion blocks (591) are provided with through holes that can closely fit with the latch pins (59).

5. A light source adjustment device for a laser 3D printer as claimed in claim 4, characterized in that: 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); The two elbow rods (61) are respectively mounted on the 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); The first annular column (62) and the second annular column (63) are coaxial with the first through hole (55), and a gap between the first annular column (62) and the second annular column (63) close to one end of the first through hole (55) is sealed.

6. A light source adjustment device for a laser 3D printer as claimed in claim 5, characterized in that: The light beam shielding portion (5) further comprises an annular pad (592) mounted on the back of the wheel disc (54) and respectively located around a plurality of the second through holes (56); The surfaces of the plurality of circular ring pads (592) are smooth and arc-shaped.

7. A light source adjustment device for a laser 3D printer as claimed in claim 6, characterized in that: The movable platform (4) further comprises a diagonal support (491) mounted on the main body vertical plate (49) and abutting against the laser (3).

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