CN111531874B

CN111531874B - Photocuring 3D printing device capable of manually adjusting resolution, multiple shafts and variable light wavelength

Info

Publication number: CN111531874B
Application number: CN202010131774.3A
Authority: CN
Inventors: 王兆龙; 谢祺晖; 段辉高; 张艺茹; 鲍忠旭
Original assignee: Hunan University
Current assignee: Hunan University
Priority date: 2020-02-29
Filing date: 2020-02-29
Publication date: 2021-10-22
Anticipated expiration: 2040-02-29
Also published as: CN111531874A

Abstract

The invention discloses a photocuring 3D printing device capable of manually adjusting resolution, multiple shafts and variable light wave wavelength. The forming platform forms circumferential rotation, and the precise rotating platform is in a working state by the aid of the stepping motor; the forming platform forms an x-axis axial movement, and an x-axis stepping motor enables an x-axis screw rod sliding table to be in a working state; the forming platform forms y-axis axial movement, and a y-axis stepping motor enables a y-axis screw rod sliding table to be in a working state. According to the product requirement, the resolution ratio is improved through the zoom lens of the adjusting optical machine of the device, the 3D printing precision is improved, and the resolution ratio can be reduced to realize large-area molding printing. The cone printing precision is improved by adopting the multi-axis motion mechanism design, and sawteeth are prevented from being generated on the edge in the process of printing the circular section.

Description

Photocuring 3D printing device capable of manually adjusting resolution, multiple shafts and variable light wavelength

Technical Field

The invention belongs to the technical field of 3D micro-nano processing, and particularly relates to a photocuring 3D printing device capable of manually adjusting resolution, multiple shafts and variable light wavelength.

Background

With the rapid development of 3D printing and micro-nano technology, in order to meet the requirements of different fields and industries, researchers at home and abroad have developed various micro-nano scale 3D printing processes and printing materials in recent years, and the printing materials are applied to various fields and industries. 3D printing is rapid prototYping (RP technology, additive manufacturing technology based on discrete accumulation thought, a material accumulation manufacturing method from bottom to top, which is a material accumulation manufacturing method based on a 'bottom to top' technology and connects and accumulates materials layer by layer according to a three-dimensional digital model of a part through a computer technology, so that a manufactured solid part reduces the manufacturing process from complex three-dimensional processing into a series of simple two-dimensional layer sheets, and the processing difficulty of the two-dimensional layer sheets is basically irrelevant to the complexity of the solid structure of the part, so that the processing difficulty of the solid part is greatly reduced, and three-dimensional solid models with different shapes and structures can be completed by a unified and automatic method, so that the 3D printing technology has the advantages of no material waste, realization of free structure design of products, short processing period and energy conservation and environmental protection.

The technology uses photosensitive resin liquid as a raw material, and the photosensitive property of the resin enables the material to be cured by polymerization reaction after being irradiated by light with a special waveband (mostly ultraviolet waveband irradiation).

At present, the photocuring 3D micro-nano printing at home and abroad basically adopts an axial movement and layer-by-layer exposure printing, and the gradient error defect exists in inclined plane printing.

Disclosure of Invention

The invention aims to design a photocuring 3D printing device with manually adjustable resolution, multiple shafts and variable light wavelength, and the photocuring 3D printing device mainly has the following advantages compared with the existing photocuring 3D printing device:

1. according to the product requirements, the resolution can be improved and the 3D printing precision can be improved by adjusting the zoom lens of the optical machine through the device, and the resolution can be reduced to realize large-area scanning and printing.

2. And the inclined plane printing precision is further improved by adopting multi-axis motion.

3. Because different photosensitive resin materials have the best matching exposure light wave, the device can realize the switching of 3 wavelengths, generally 365nm, 400nm and 405 nm.

The invention adopts the technical scheme that the photocuring 3D printing device with resolution ratio capable of being manually adjusted, multiple shafts and variable light wave wavelength comprises a hanging basket base 1, a hanging basket top plate 2, a t rod 3, a hanger rod 4, a t rod sleeve 4-1, a forming platform 5, an X-axis driven sliding table 6, a main material groove 7, a release film 8, a rolling bearing 7-1, an XY connecting sheet 9-1, a precision rotary platform 10, a Z-axis lead screw sliding table 11, a groove clamping base 12, an X-axis lead screw sliding table 13, a triangular mounting base 13-2, a Y-axis lead screw sliding table 14, a hanging basket base 15, an optical machine 16 and a stepping motor 10-1. The X-axis screw rod sliding table 13 and the Y-axis screw rod sliding table 14 belong to the same type of screw rod sliding table, and a stepping motor 10-1 and a sliding block 13-1 of the screw rod sliding table are consistent; driven slip table 6 of X axle, the driven slip table of Y axle belong to same kind of driven slip table, play the guide effect. An X-axis stepping motor 20 is installed on an X-axis base 18 through a motor support, the X-axis stepping motor 20 drives an X-axis lead screw sliding table 13 through a coupler 19, and a Z-axis base 17 is fixed on an X-axis sliding block 21 on the X-axis lead screw sliding table 13.

The hanging basket seat 1 is fixedly connected with the precision rotating platform 10 through bolts, a driven part of the precision rotating platform 10 is fixedly connected with the hanging basket top plate 2 through screws, and the precision rotating platform 10 can enable the hanging basket top plate 2 to rotate on the horizontal plane; the hanging basket top plate 2 and the hanging basket base 15 are connected through four suspension rods 4 which are arranged in parallel to form a rotary platform; the Y-axis screw rod sliding table 14 and the Y-axis driven sliding table are arranged on two sides of the hanging basket base 15, the Y-axis screw rod sliding table 14 and the Y-axis driven sliding table are positioned on the same plane, and the Y-axis driven sliding table plays a role in guiding; two XY connecting sheets 9-1 are respectively fixed on a Y-axis screw rod sliding table 14 and a Y-axis driven sliding table in parallel through bolts, Y-direction movement forming the Y-axis screw rod sliding table 14 realizes synchronous sliding of the two XY connecting sheets 9-1, an X-axis screw rod sliding table 13 and an X-axis driven sliding table 6 are fixedly arranged at two ends of the XY connecting sheets 9-1 through bolts, so that the Y-axis screw rod sliding table 14, the Y-axis driven sliding table, the X-axis screw rod sliding table 13 and the X-axis driven sliding table 6 are lapped into a square device; the hanging basket base 15 is connected with the bottom of the hanging basket base 1 through a rolling bearing 7-1, and circumferential movement is realized at the bottom of the hanging basket base 1; the release film 8 is fastened at the bottom of the main material groove 7 through screws; the main trough 7 is fastened and connected by a left trough clamping seat 12 and a right trough clamping seat 12 through screws, and the left trough clamping seat 12 and the right trough clamping seat 12 are respectively connected on a sliding block 13-1 of the X-axis screw rod sliding table 13 and a sliding block 13-1 of the X-axis driven sliding table 6 through screw fastening; a sliding block 13-1 of the X-axis screw rod sliding table 13 is connected with a triangular mounting seat 13-2 through a bolt, the triangular mounting seat 13-2 is fixedly connected with a base of the Z-axis screw rod sliding table 11 through a bolt, a sliding block of the Z-axis screw rod sliding table 11 is fixedly connected with a t rod 3 through a bolt, and the t rod 3 is fixedly connected with a forming platform 5 through a t rod sleeve 4-1 through a bolt; the t-bar 3 is parallel to the Z-axis rail mount vertical direction. The X-axis, Y-axis and Z-axis sliding tables are integrated with the forming platform and the main material groove 7.

The forming platform 5 rotates in the circumferential direction, namely the stepping motor 10-1 enables the precision rotating platform 10 to be in a working state; the forming platform 5 forms X-axis axial movement, namely an X-axis stepping motor 20 enables an X-axis screw rod sliding table 13 to be in a working state; the forming platform 5 forms Y-axis axial movement, and a Y-axis stepping motor enables the Y-axis screw rod sliding table 14 to be in a working state.

The precision rotating platform 10 consists of a stepping motor 10-1, a test gear 10-4, a test gearwheel 10-3, a crossed roller bearing 10-5, an upper outer ring 10-6, an upper inner ring 10-7, a lower outer ring 10-2 and a lower end cover 10-8. The lower end cover 10-8 is fixedly connected with the hanging basket seat 1 through screws, the stepping motor 10-1 is fixedly connected on the lower end cover 10-8 through screws, and the crossed roller bearing 10-5 is in clearance fit with the middle of the upper inner ring 10-7 and the lower outer ring 10-2; the experimental large gear 10-3 is matched with the lower outer ring 10-2 and is fixedly connected with the upper inner ring 10-7 and the lower end cover 10-8 through screws, and the experimental gear 10-4 and the experimental large gear 10-3 are matched with each other; the central shaft of the test gear 10-4 is connected with the shaft of the stepping motor 10-1, the upper outer ring 10-6 is fixedly connected to the hanging basket top plate 2 through screws, and the hanging basket is rotated by controlling the working state of the stepping motor 10-1.

The optical engine 16 is composed of a lens 22, a chassis 23, and an optical engine chassis 27, as shown in fig. 4. The lens 22 consists of a lens group I22-1, a lens group II22-2, a lens group II22-3, a Fresnel lens 22-4, a lens group front lens 22-5, a lens group rear lens 22-6, a lens group upper cover 22-7 and a lens group lower cover 22-8; the rear Fresnel lens 22-4 is fixed on the lens group upper cover 22-7 through cementing, and the lens group upper cover 22-7 and the lens group lower cover 22-8 are connected to the optical machine shell through screw holes; the optical lens is connected to the lens group upper cover 22-7 by a screw.

As shown in fig. 5, the case 23 is composed of a spectroscope 23-1, a spectroscope bracket 23-1-1, a first reflector 23-2, a first reflector bracket 23-2-1, a spectroscope 23-3, a spectroscope bracket 23-3-1, a polarizer 23-4, a polarizer bracket 23-4-1, a light source 23-5, a light source bracket 23-5-1, a connection column 23-6, a bolt 23-6-1, a reflector 23-7, a heat sink 23-8, a liquid crystal display LCD23-9 for short, a liquid crystal display bracket 23-9-1, a second reflector 23-10 and a second reflector bracket 23-10-1; the spectroscope 23-1 is inserted into an inner groove of the spectroscope support 23-1-1 and connected in an interference fit manner, and the spectroscope support 23-1-1 is welded on the optical machine bottom plate 27; the first reflector 23-2 is inserted into the inner groove of the first reflector bracket 23-2-1 and connected in an interference fit manner, and the first reflector bracket 23-2-1 is welded on the optical machine bottom plate 27; the beam splitter prism 23-3 is inserted into the beam splitter prism support 23-3-1 for interference fit connection, and the beam splitter prism support 23-3-1 is welded on the optical machine bottom plate 27; the polarizer 23-4 is inserted into an inner groove of the polarizer support 23-4-1 and connected in an interference fit manner, and the polarizer support 23-4-1 is welded on the optical machine bottom plate 27; the light source 23-5 is inserted into the light source bracket 23-5-1, and the light source bracket 23-5-1 is welded on the optical machine bottom plate 27; the lower end of the connecting column 23-6 is welded on the bottom plate 27 of the polishing machine, and the threaded hole at the upper end is fastened on the shell of the case 23 through a bolt 23-6-1; the reflector 23-7 is inserted into the luminous source bracket 23-5-1; the radiator 23-8 is fixed on the optical machine bottom plate 27 through screws; the LCD23-9 is inserted into the groove of the LCD bracket 23-9-1; the second reflector 23-10 is inserted into the inner groove of the second reflector bracket 23-10-1; the liquid crystal display bracket 23-9-1 and the second mirror bracket 23-10-1 are welded to the chassis 27.

A spectroscope 23-1, a reflector 23-2 and a polarizer 23-4 are distributed in the case 23 to form a light emitting circuit arrangement, wherein B, R, G represents three lights with different wavelengths, and the common wavelength is 365 nm-405 nm.

The functional principle of the optical machine is as follows: the light splitting prism 23-3 is positioned at the light collection position, light is collected through the LCD23-9 plates on three sides, is emitted from the other side and is refracted into the lens 22 through the second reflector 23-10, and the light emitting source 23-5 consists of an aluminum heat dissipation sheet, a uv substrate, a uv lamp bead, a front Fresnel lens and a light reflection sheet. The strong light emitted by the light source is eliminated and filtered by the polarizer 23-4, the three beams of RGB light are formed by the spectroscope 23-1, then the light is transmitted through the three LCD plates by the reflector 23-2, only one LCD plate is lightened each time, the light with one wavelength is transmitted, the light is refracted by the middle beam splitter 23-3, the image is projected on the lens group rear lens 23-6 to be imaged by the reflector and the rear Fresnel lens 22-4, and the image is zoomed by the lens group and projected on the printing platform.

Compared with the prior art, the invention has the following technical effects:

the device has the advantages that 1, the resolution can be further improved and the 3D printing precision can be improved through the zoom lens of the adjusting light machine of the device according to product requirements, and the resolution can be reduced to realize large-area molding printing.

2, the printing precision of the cone is further improved by adopting the multi-axis motion mechanism design, and the sawtooth is avoided from being generated at the edge in the process of printing the circular section.

3 because different photosensitive resin materials have the best matching exposure light wave, the device can realize the switching of 3 wavelengths, generally 365nm, 400nm and 405 nm.

Drawings

FIG. 1 is a block diagram of the apparatus of the present invention.

Fig. 2 is a side view of the device of the present invention.

Fig. 3 is a structural view of the precision rotary table.

Fig. 4 is a structural view of the optical engine lens portion.

Fig. 5 is a structural diagram of the chassis portion of the optical machine.

Fig. 6 is an opto-mechanical schematic.

Detailed Description

The invention is further described with reference to the above figures.

The hanging basket seat 1 is fixedly connected with the precision rotating platform 10 through bolts, a driven part of the precision rotating platform 10 is fixedly connected with the basket top plate 2 through screws, and the precision rotating platform 10 can enable the hanging basket plate 2 to rotate on the horizontal plane; the hanging basket top plate 2 and the hanging basket base 15 are connected through four suspension rods 4 which are arranged in parallel to form a rotary platform; the Y-axis screw rod sliding table 14 and the Y-axis driven sliding table are arranged on two sides of the hanging basket base 15, the Y-axis screw rod sliding table 14 and the Y-axis driven sliding table are positioned on the same plane, and the Y-axis driven sliding table plays a role in guiding; two XY connecting sheets 9-1 are respectively fixed on a Y-axis screw rod sliding table 14 and a Y-axis driven sliding table in parallel through bolts, Y-direction movement forming the Y-axis screw rod sliding table 14 realizes synchronous sliding of the two XY connecting sheets 9-1, an X-axis screw rod sliding table 13 and an X-axis driven sliding table 6 are fixedly arranged at two ends of the XY connecting sheets 9-1 through bolts, so that the Y-axis screw rod sliding table 14, the Y-axis driven sliding table, the X-axis screw rod sliding table 13 and the X-axis driven sliding table 6 are lapped into a square device; the hanging basket base 15 is connected with the bottom of the hanging basket base 1 through a rolling bearing 7-1, and circumferential movement is realized at the bottom of the hanging basket base 1; the release film 8 is fastened at the bottom of the main material groove 7 through screws; the main trough 7 is fastened and connected by a left trough clamping seat 12 and a right trough clamping seat 12 through screws, and the left trough clamping seat 12 and the right trough clamping seat 12 are respectively connected on a sliding block 13-1 of the X-axis screw rod sliding table 13 and a sliding block 13-1 of the X-axis driven sliding table 6 through screw fastening; a sliding block 13-1 of the X-axis screw rod sliding table 13 is connected with a triangular mounting seat 13-2 through a bolt, the triangular mounting seat 13-2 is fixedly connected with a base of the Z-axis screw rod sliding table 11 through a bolt, a sliding block of the Z-axis screw rod sliding table 11 is fixedly connected with a t rod 3 through a bolt, and the t rod 3 is fixedly connected with a forming platform 5 through a t rod sleeve 4-1 through a bolt; the t-bar 3 is parallel to the Z-axis rail mount vertical direction. The X-axis, Y-axis and Z-axis sliding tables are integrated with the forming platform and the main material groove 7.

The optical engine 16 is composed of a lens 22, a chassis 23, and an optical engine chassis 27, as shown in fig. 4. The lens 22 consists of a lens group I22-1, a lens group II22-2, a lens group III22-3, a rear Fresnel lens 22-4, a lens group front lens 22-5, a lens group rear lens 22-6, a lens group upper cover 22-7 and a lens group lower cover 22-8; the rear Fresnel lens 22-4 is fixed on the lens group lower cover 22-8 through cementing, and the lens group upper cover 22-7 and the lens group lower cover 22-8 are connected to the optical machine shell through screw holes. The optical lens is connected to the lens group upper cover 22-7 by a screw.

As shown in fig. 5, the case 23 is composed of a spectroscope 23-1, a spectroscope bracket 23-1-1, a first reflector 23-2, a first reflector bracket 23-2-1, a spectroscope 23-3, a spectroscope bracket 23-3-1, a polarizer 23-4, a polarizer bracket 23-4-1, a light source 23-5, a light source bracket 23-5-1, a connection column 23-6, a bolt 23-6-1, a reflector 23-7, a heat sink 23-8, a liquid crystal display LCD23-9 for short, a liquid crystal display bracket 23-9-1, a second reflector 23-10 and a second reflector bracket 23-10-1; the spectroscope 23-1 is inserted into an inner groove of the spectroscope support 23-1-1 and connected in an interference fit manner, and the spectroscope support 23-1-1 is welded on the optical machine bottom plate 27; the first reflector 23-2 is inserted into the inner groove of the first reflector bracket 23-2-1 and connected in an interference fit manner, and the first reflector bracket 23-2-1 is welded on the optical machine bottom plate 27; the beam splitter prism 23-3 is inserted into the beam splitter prism support 23-3-1 for interference fit connection, and the beam splitter prism support 23-3-1 is welded on the optical machine bottom plate 27; the polarizer 23-4 is inserted into an inner groove of the polarizer support 23-4-1 and connected in an interference fit manner, and the polarizer support 23-4-1 is welded on the optical machine bottom plate 27; the light source 23-5 is inserted into the light source bracket 23-5-1, and the light source bracket 23-5-1 is welded on the optical machine bottom plate 27; the lower end of the connecting column 23-6 is welded on the bottom plate 27 of the polishing machine, and the threaded hole at the upper end is fastened on the shell of the case 23 through a bolt 23-6-1; the reflector 23-7 is inserted into the luminous source bracket 23-5-1; the radiator 23-8 is fixed on the optical machine bottom plate 27 through screws; the LCD23-9 is inserted into the groove of the LCD bracket 23-9-1; the second reflector 23-10 is inserted into the inner groove of the second reflector bracket 23-10-1; the liquid crystal display bracket 23-9-1 and the second mirror bracket 23-10-1 are welded to the chassis 27;

The functional principle of the optical machine is as follows: the light splitting prism 23-3 is positioned at the light collection position, light is collected through the LCD23-9 plates on three sides, is emitted from the other side and is refracted into the lens 22 through the second reflector 23-10, and the light emitting source 23-5 consists of an aluminum heat dissipation sheet, a uv substrate, a uv lamp bead, a front Fresnel lens and a light reflection sheet. The strong light emitted by the light source is eliminated and filtered by the polarizer 23-4, the three beams of RGB light are formed by the spectroscope 23-1, then the light is transmitted through the three LCD plates by the reflector 23-2, only one LCD plate is lightened each time, the light with one wavelength is refracted by the middle beam splitter prism 23-3, the image is projected to the rear lens of the lens group by the reflector and the rear Fresnel lens 22-4 to be imaged, and the image is zoomed by the lens group to be projected to the printing platform.

Firstly, selecting a proper liquid material according to the performance of a designed part, and pouring the selected resin liquid material into a solution tank; importing the designed parameters and the sliced three-dimensional model into a machine, selecting a model required by the machine, pressing down and starting, returning the X axis, the Y axis and the Z axis of the machine to the origin of a reference coordinate, and processing by a processor in the machine according to the set model; the size and the resolution ratio of a pattern are adjusted by adjusting a lens group in the optical machine, light is emitted by the lens, the material in an illuminated area is quickly solidified, and the machine can realize the movement of parts in a Y axis, an X axis and a Z axis and the rotation of a precise rotary platform according to the requirement of the processing of a three-dimensional model of a product, so that multi-axis linkage is realized. When the layer is processed, the workbench automatically rises for a certain distance according to the parameters to realize release and then descends for a certain distance, and the rising distance is a preset difference value more than the descending distance, and the difference value is the layer thickness value of the next layer. And after the workbench descends, the next layer of processing can be carried out. When a circle, a sector or a cambered surface with a constant curvature radius needs to be machined, the center of the graph is aligned with the optical center of the lens through the movement of the X, Y shaft. The stage is then lowered to a predetermined position and the lens projects a thin band of light starting at the center of the circle and having a length of a radius. At the moment, the hanging basket rotates under the driving of the precise rotary platform, and the light band draws a circle by taking the center of the graph as an axis. After the rotation is finished, the hanging basket returns to the original point, and the machine continues to process parts. When the last layer is processed, the machine stops working, the part is finished at the moment, the part is stopped on the liquid material, the worker takes down the part at the moment, and when the next part is printed, the worker only needs to press the start key.

Note that: the origin of the reference coordinate of the machine is X, Y, Z axes, so that the lens is opposite to the center right below the solution tank and the workbench is coincided with the bottom of the solution tank.

Claims

1. The utility model provides a photocuring 3D printing device that can manual regulation resolution ratio, multiaxis, variable light wavelength which characterized in that:

the hanging basket seat (1) is fixedly connected with the precise rotating platform (10) through bolts, a driven part of the precise rotating platform (10) is fixedly connected with the hanging basket top plate (2) through screws, and the precise rotating platform (10) can enable the hanging basket top plate (2) to rotate on the horizontal plane; the hanging basket top plate (2) and the hanging basket base (15) are connected through four suspension rods (4) which are arranged in parallel to form a rotary platform; the Y-axis screw rod sliding table (14) and the Y-axis driven sliding table are arranged on two sides of the hanging basket base (15), the Y-axis screw rod sliding table (14) and the Y-axis driven sliding table are positioned on the same plane, and the Y-axis driven sliding table plays a role in guiding; two XY connecting sheets (9-1) are respectively fixed on a Y-axis lead screw sliding table (14) and a Y-axis driven sliding table in parallel through bolts, Y-direction movement forming the Y-axis lead screw sliding table (14) realizes synchronous sliding of the two XY connecting sheets (9-1), an X-axis lead screw sliding table (13) and an X-axis driven sliding table (6) are fixedly arranged at two ends of the XY connecting sheets (9-1) through bolts, so that the Y-axis lead screw sliding table (14), the Y-axis driven sliding table, the X-axis lead screw sliding table (13) and the X-axis driven sliding table (6) are lapped into a square device; the hanging basket base (15) is connected with the bottom of the hanging basket base (1) through a rolling bearing (7-1), and circumferential movement is realized at the bottom of the hanging basket base (1); the release film (8) is fastened at the bottom of the main trough (7) through screws; the main trough (7) is tightly connected with a left trough clamping seat and a right trough clamping seat (12) through screws, and the left trough clamping seat and the right trough clamping seat (12) are respectively connected with a sliding block (13-1) of the X-axis screw rod sliding table (13) and a sliding block (13-1) of the X-axis driven sliding table (6) through screw fastening; a sliding block (13-1) of the X-axis screw rod sliding table (13) is connected with a triangular mounting seat (13-2) through a bolt, the triangular mounting seat (13-2) is fixedly connected with a base of the Z-axis screw rod sliding table (11) through a bolt, the sliding block of the Z-axis screw rod sliding table (11) is fixedly connected with a t-rod (3) through a bolt, and the t-rod (3) is fixedly connected with a forming platform (5) through a t-rod sleeve (4-1) through a bolt; the t-bar (3) is parallel to the vertical direction of the Z-axis guide rail frame; the X-axis sliding table, the Y-axis sliding table and the Z-axis sliding table are integrated with the forming platform and the main trough (7); an X-axis stepping motor (20) is installed on an X-axis base (18) through a motor support, the X-axis stepping motor (20) drives an X-axis screw rod sliding table (13) through a coupler (19), and a Z-axis base (17) is fixed on an X-axis sliding block (21) on the X-axis screw rod sliding table (13).

2. A multi-axis, variable wavelength photocuring 3D printing device with manually adjustable resolution as claimed in claim 1, wherein:

the forming platform (5) rotates in the circumferential direction, and the stepping motor (10-1) enables the precision rotating platform (10) to be in a working state; the forming platform (5) forms X-axis axial movement, and an X-axis stepping motor (20) enables an X-axis screw rod sliding table (13) to be in a working state; the forming platform (5) forms Y-axis axial movement, and a Y-axis stepping motor enables the Y-axis screw rod sliding table (14) to be in a working state.

3. A multi-axis, variable wavelength photocuring 3D printing device with manually adjustable resolution as claimed in claim 1, wherein:

the precision rotating platform (10) consists of a stepping motor (10-1), a test gear (10-4), a test gearwheel (10-3), a crossed roller bearing (10-5), an upper outer ring (10-6), an upper inner ring (10-7), a lower outer ring (10-2) and a lower end cover (10-8); the lower end cover (10-8) is fixedly connected with the hanging basket seat (1) through screws, the stepping motor (10-1) is fixedly connected on the lower end cover (10-8) through screws, and the crossed roller bearing (10-5) is in clearance fit with the middle of the upper inner ring (10-7) and the lower outer ring (10-2); the experimental gear wheel (10-3) is matched with the lower outer ring (10-2) and is fixedly connected with the upper inner ring (10-7) and the lower end cover (10-8) through screws, and the experimental gear wheel (10-4) and the experimental gear wheel (10-3) are in gear matching; the central shaft of the test gear (10-4) is connected with the shaft of the stepping motor (10-1), the upper outer ring (10-6) is fixedly connected to the hanging basket top plate (2) through screws, and the hanging basket is rotated by controlling the working state of the stepping motor (10-1).

4. A multi-axis, variable wavelength photocuring 3D printing device with manually adjustable resolution as claimed in claim 1, wherein:

the optical machine (16) consists of a lens (22), a case (23) and a machine bottom plate (27), wherein the lens (22) consists of a lens group I (22-1), a lens group II (22-2), a lens group III (22-3), a rear Fresnel lens (22-4), a lens group front lens (22-5), a lens group rear lens (22-6), a lens group upper cover (22-7) and a lens group lower cover (22-8); the rear Fresnel lens (22-4) is fixed on the lens group lower cover (22-8) through cementing, and the lens group upper cover (22-7) and the lens group lower cover (22-8) are connected to the optical machine shell through screw holes; the optical lens is connected to the lens group upper cover (22-7) through screw threads.

5. The photocuring 3D printing device of claim 4 with manually adjustable resolution, multiple axes, variable wavelength of light, characterized by:

the case (23) is composed of a spectroscope (23-1), a spectroscope bracket (23-1-1), a first reflector (23-2), a first reflector bracket (23-2-1), a beam splitter prism (23-3), a beam splitter prism bracket (23-3-1), a polarizer (23-4), a polarizer bracket (23-4-1) and a luminous source (23-5), the light source comprises a light source bracket (23-5-1), a connecting column (23-6), a bolt (23-6-1), a reflector (23-7), a radiator (23-8), a liquid crystal display (LCD for short) (23-9), a liquid crystal display bracket (23-9-1), a second reflector (23-10) and a second reflector bracket (23-10-1); the spectroscope (23-1) is inserted into an inner groove of the spectroscope bracket (23-1-1) and connected in an interference fit manner, and the spectroscope bracket (23-1-1) is welded on the optical machine bottom plate (27); the first reflector (23-2) is inserted into an inner groove of the first reflector bracket (23-2-1) and connected in an interference fit manner, and the first reflector bracket (23-2-1) is welded on the optical machine bottom plate (27); the beam splitter prism (23-3) is inserted into the beam splitter prism support (23-3-1) and connected in an interference fit manner, and the beam splitter prism support (23-3-1) is welded on the optical machine bottom plate (27); the polarizer (23-4) is inserted into an inner groove of the polarizer bracket (23-4-1) and connected in an interference fit manner, and the polarizer bracket (23-4-1) is welded on the optical machine bottom plate (27); the luminous source (23-5) is inserted into the luminous source bracket (23-5-1), and the luminous source bracket (23-5-1) is welded on the optical machine bottom plate (27); the lower end of the connecting column (23-6) is welded on the polishing machine bottom plate (27), and the threaded hole at the upper end is fastened on the shell of the case (23) through a bolt (23-6-1); the reflector (23-7) is inserted into the luminous source bracket (23-5-1); the radiator (23-8) is fixed on the optical machine bottom plate (27) through screws; the liquid crystal display (23-9) is inserted into the groove of the liquid crystal display bracket (23-9-1); the second reflector (23-10) is inserted into the inner groove of the second reflector bracket (23-10-1); the liquid crystal display holder (23-9-1) and the second mirror holder (23-10-1) are welded to the chassis (27).

6. A multi-axis, variable wavelength photocuring 3D printing device with manually adjustable resolution as claimed in claim 1, wherein:

a spectroscope (23-1), a first reflector (23-2) and a polarizer (23-4) are distributed in the case (23), the spectroscope (23-3) is positioned at a light collection position, light is collected through LCD (23-9) plates on three sides, and is emitted from the other side and refracted into the lens (22) through a second reflector (23-10), and the light emitting source (23-5) consists of an aluminum heat dissipation sheet, a uv substrate, a uv lamp bead, a front Fresnel lens and a light reflection sheet; the high light emitted by the luminous source is removed and filtered by the polarizer (23-4), the scattered light in the light beam is filtered, three RGB light beams are formed by the spectroscope (23-1), then the high light is transmitted by the first reflector (23-2) through three LCD plates respectively, only one LCD plate is lightened each time, the light with one wavelength is transmitted, after being refracted by the middle light splitting prism (23-3), the image is projected onto the lens group rear lens (22-6) to be imaged through the reflector and the rear Fresnel lens (22-4), and the image is zoomed through the lens group and projected onto the printing platform.

7. A multi-axis, variable wavelength photocuring 3D printing device with manually adjustable resolution as claimed in claim 1, wherein:

firstly, selecting a proper liquid material according to the performance of a designed part, and pouring the selected resin liquid material into a solution tank; importing the designed parameters and the sliced three-dimensional model into a machine, selecting a model required by the machine, pressing down and starting, returning the X axis, the Y axis and the Z axis of the machine to the origin of a reference coordinate, and processing by a processor in the machine according to the set model; the lens group in the adjusting light machine adjusts the size and the resolution ratio of the pattern, the lens emits light, the material of the illuminated area is rapidly solidified, the machine can realize the movement of the part in the Y axis, the X axis and the Z axis and the rotation of the precise rotary platform according to the requirement of the three-dimensional model processing of the product, thereby realizing multi-axis linkage; when one layer is processed, the workbench automatically rises for a certain distance according to the parameters to realize release and then descends for a certain distance, and the rising distance is more than the descending distance by a preset difference value, namely the layer thickness value of the next layer; after the worktable descends, the next layer of processing can be carried out; when a circle, a sector or a cambered surface with constant curvature radius needs to be processed, firstly, the center of the graph is aligned with the optical center of the lens through the movement of an X, Y shaft; then the workbench descends to a preset position, and the lens projects a thin light band which starts from the center of the circle and is as long as the radius; at the moment, the hanging basket rotates under the driving of the precise rotary platform, and the light band draws a circle by taking the center of the graph circle as an axis; after the rotation is finished, the hanging basket returns to the original point, and the machine continues to process parts; when the last layer is processed, the machine stops working, the part is finished at the moment, the part is stopped on the liquid material, the worker takes down the part at the moment, and when the next part is printed, the worker only needs to press the start key.