CN109719954A - A kind of DLP photocuring increasing material manufacturing surface quality improvement method - Google Patents
A kind of DLP photocuring increasing material manufacturing surface quality improvement method Download PDFInfo
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- CN109719954A CN109719954A CN201910038306.9A CN201910038306A CN109719954A CN 109719954 A CN109719954 A CN 109719954A CN 201910038306 A CN201910038306 A CN 201910038306A CN 109719954 A CN109719954 A CN 109719954A
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Abstract
The invention belongs to increases material manufacturing technology fields, more particularly to a kind of DLP photocuring increasing material manufacturing surface quality improvement method, slicing treatment is carried out to three-dimensional digital model first, obtain three-dimensional digital model interior zone and edge contour, then data processing is carried out to three-dimensional digital model interior zone and edge contour respectively, it obtains light beam solidification scan path and DLP solidifies inner boundary, finally, DLP solidification is carried out in the inside that DLP solidifies inner boundary, obtain consolidation zone, it is scanned using scanning galvanometer control light beam along light beam solidification scan path, obtain the exterior contour region of three-dimensional digital model, partial region and DLP in exterior contour region solidify border overlay, consolidation zone is connect with exterior contour region；Its scientific in principle is reliable, and solidification process is simple, can effectively improve the surface quality of existing DLP light source photocuring increasing material manufacturing, reduces subsequent processing process.
Description
Technical field:
The invention belongs to increases material manufacturing technology fields, and in particular to a kind of DLP photocuring increasing material manufacturing surface quality raising
Method can effectively improve the surface quality of single DLP light source photocuring increasing material manufacturing, reduce subsequent processing process.
Background technique:
Photocuring (photocuring) refers to the solidification process of monomer, oligomer or polymer matrix under photoinduction, tool
There is the characteristics of efficient, wide adaptability, economy, energy-saving and environmental protection, is generally used for film forming procedure, the highest ultraviolet light of energy in spectrum
The activation energy of generation can be such that C-C key of unsaturated polyester resin is broken, and generate free radicals to make resin solidification；Work as insatiable hunger
After photosensitizer is added in polyester resin, makees energy initiation with ultraviolet light or visible light, resin can be made to crosslink reaction quickly.
Increasing material manufacturing (Additive Manufacturing, AM) is commonly called as 3D printing, has merged CAD, material
Material processing with forming technique, based on digital model file, by software and digital control system by dedicated metal material, non-gold
Belong to material and biomaterial for medical purpose, is successively accumulated according to modes such as extruding, sintering, melting, photocuring, injections, produce reality
The manufacturing technology of body article.It is a kind of " oneself relative to cooked mode difference traditional, to raw material removal-cutting, assembling
On down " by the manufacturing method of material addition, from scratch.This makes the past by the constraint of conventionally manufactured mode, and nothing
The complex structural member manufacture that method is realized becomes possible.In the latest 20 years, AM technology achieves quick development, " rapid prototyping system
Make (Rapid Prototyping) ", " 3 D-printing (3D Printing) ", " entity freely manufactures (Solid Free-form
) " etc Fabrication different call the characteristics of never ipsilateral expresses this technology respectively.Increases material manufacturing technology is
Refer to based on discrete-accumulation principle, by the science system of part three-dimensional data driving direct manufacturing parts.Based on different points
Class principle and understanding mode, increases material manufacturing technology there are also rapid prototyping, Quick-forming, quickly a variety of appellations such as manufacture, 3D printing,
Its intension is still deepening constantly, and extension also constantly extends, " increasing material manufacturing " mentioned here and " Quick-forming ", " quickly manufacture "
Meaning is identical.
Photocuring increasing material manufacturing at present mainly has SLA (stereolithography) and (digital light processing) face DLP to solidify two kinds
Mode, wherein the principle of SLA is using laser or ultraviolet light beam scanning curing photosensitive resin, by multi-strip scanning line forming face, face
Superposition forms 3D solid, although it is higher to take a long time surface quality, may be directly applied to casting system or model
Exploitation；DLP is integrally to be projected on resin layer with digital technology shadow casting technique by figure is sliced, and once forms cured layer, China
A kind of DLP photocuring 3D printing method is the following steps are included: S1, threedimensional model is inputted disclosed in patent 201810491007.6
In computer；S2, by the computer and DLP photocuring 3D printer data connection in S1, threedimensional model is formed numerical control programming by computer,
And numerical control programming is delivered in DLP photocuring 3D printer；DLP photocuring 3D printer in S3, S2 carries out 3 D-printing；
S4 takes out threedimensional model printed in S3 from DLP photocuring 3D printer；S5 puts the threedimensional model formed in S4
Enter in cleaning solution and is cleaned；The DLP photocuring 3D printer used in the above method includes supporting mechanism, printing body, the
One printing mechanism, protection mechanism, the second printing mechanism and demoulding mechanism；Fixed first printing in the top of the printing body
Mechanism, and the supporting mechanism is installed at the top of the printing body；The top slide connection of the supporting mechanism is used for model
The demoulding mechanism of demoulding；First printing mechanism connects two second printers for carrying out while printing
Structure；It is fixed for the protection mechanism for removing odors and avoiding printer model to be interfered at the top of the printing body；In
A kind of Stereolithography equipment based on DLP disclosed in state's patent 201810098843.8 includes pedestal, the top of the pedestal
Equipped with forming tank, it is filled with liquid photosensitive resin in the forming tank, it is symmetrical to be connected with two between the forming tank and pedestal
The first spring, the upper surface of the pedestal is symmetrically connected with two pieces of support plates about forming tank, two pieces of support plates it is upper
End is connected with top plate jointly, and the upper surface of the top plate is fixedly connected with the controller of industrial personal computer and industrial personal computer side, the top
DLP projection system is fixedly connected at the center of the lower surface of plate, the side of the DLP projection system is equipped with lifting device, institute
The lower surface that lifting device is fixedly connected on top plate is stated, the lifting device is connected with lifting platform far from one end of top plate, described
Lifting platform is located in forming tank, and radiator is connected on the side wall of the pedestal, and the side wall of the forming tank is connected by inlet tube
Pass to the inlet of radiator, the liquid outlet of the radiator is connected to the side wall of forming tank by outlet tube, in the inlet tube
Equipped with micro pump；A kind of DLP photocureable rapid shaping border processing method packet disclosed in Chinese patent 201710907987.9
It includes: threedimensional model being sliced and is formed；Formation phenomena is observed, imaging surface edge halation size and forming model edge cure shape are obtained
Condition；Model silhouette line is obtained, and adjusts the width of the model silhouette line by definite value, obtains the contour edge line of bandwidth；?
In the closed area that the contour edge line of the bandwidth is surrounded, normal filling of drawing is carried out, in the profile of the bandwidth
In edge line, drawing filling is carried out according to goal-selling gray scale, slice map is constituted, is formed；Chinese patent
The quick 3D printing method of a kind of large format based on DLP photocuring disclosed in 201710485789.8, using four groups of DLP projection systems
The one large-scale breadth optical projection system (abbreviation large format optical projection system) of system component, large format optical projection system is uniformly controlled in computer
It is lower it is successively continuous play 365-405nmUV light image, ultraviolet light image solidifies photosensitive resin successively, Z axis print platform by
Layer decline, and so on iteration is to form three-dimension object；In order to improve print speed, by determine concentration high pressure oxygen come
Inhibit the generation of bubble and form uncured dead zone, liquid level is able to maintain stabilization under the action of dead zone and high pressure oxygen, together
When under the action of tandem-driving bogie and liquid level laser range finder, under UV light image continuous exposure carry out quick three-dimensional printing；In
A kind of artificial tooth wax pattern DLP photocuring 3D printing method disclosed in state's patent 201710200627.5 the following steps are included: first, obtain
The three-dimensional digital model for taking artificial tooth wax pattern, using CAD/CAM software by the three-dimensional digital model of artificial tooth wax pattern according to scheduled thickness
Degree is layered, and multiple layered images are made；The second, the multiple layered images made in first step are inputted into artificial tooth wax pattern
DLP photocuring 3D printer；Wherein, the artificial tooth wax pattern DLP photocuring 3D printer includes materials chamber, workbench, work
The top of materials chamber is arranged in platform driving device, control unit and light source, the workbench, and the light source is arranged in material
The lower section of chamber, the light source include LED mounting plate and LED array, and the LED array is mounted on the LED mounting plate
On；The materials chamber is provided with light-sensitive material liquid；The workbench is connect with the Working table driving device, described
Working table driving device be able to drive workbench free movement on front and rear, left and right and these three upper and lower dimensions；It is described
Working table driving device and the light source connect respectively with the control unit, described control unit control is described
Working table driving device and then the direction of motion, move distance and the movement velocity for controlling the workbench；The control list
Member also controls the light intensity and temperature of the light source；Third, the control unit control Working table driving device drive
The workbench enters the materials chamber, makes the bottom surface of the workbench and the bottom level inner wall of the materials chamber
The distance between face is the thickness of a scheduled layering in first step, the bottom surface of the workbench and the materials chamber
Bottom level inner wall between gap be full of light-sensitive material liquid；The control unit further controls the light source and opens
The part LED light emitting diode in LED array is opened, LED light emitting diode and the artificial tooth wax pattern DLP photocuring 3D are turned on
First in multiple layered images that printer receives is corresponding, and the light that LED light emitting diode issues makes the work
Make the light-sensitive material liquid photocuring between the bottom surface of platform and the bottom level inner wall of the materials chamber, completes the first point
The production of tomographic image；Then the control unit control Working table driving device drive the workbench gradually on
Rise, it is every rise a scheduled lift height then the control unit control the light source open in LED array with it is corresponding
The corresponding part LED light emitting diode of layered image, successively complete the production of all layered images, be finally completed artificial tooth wax
The production of type；Using area source, the directive property of area source is not so good as laser or ultraviolet by above-mentioned patent and DLP in the prior art
Laser, phenomena such as refraction, scattering can occur when transparent medium is propagated due to normal light, can be when light enters photosensitive resin layer
There is halation in imaging edge, however the intensity of halation with spread apart from uncontrollable, the resin solidification of GLOW INCLUSION AREA will lead to mould
Type profiled edge is coarse, and whole roughness improves, and precision reduces.Based on existing DLP solidification increasing material manufacturing surface quality of workpieces compared with
The main reason for low, researches and develops a kind of DLP photocuring increasing material manufacturing surface quality improvement method, there is very much society and economic value.
Summary of the invention:
Goal of the invention of the invention is to overcome disadvantage of the existing technology, designs a kind of DLP photocuring increasing material manufacturing
Surface quality improvement method effectively improves DLP photocuring increasing material manufacturing piece surface precision, reduces surface roughness.
To achieve the goals above, the technique of DLP photocuring increasing material manufacturing surface quality improvement method of the present invention
Process are as follows:
One, slicing treatment is carried out to three-dimensional digital model using computer, by single layer three-dimensional digital model slice of data,
Obtain three-dimensional digital model interior zone and three-dimensional digital model contour edge；
Two, by the exterior contour of three-dimensional digital model, internally normal direction reduces 0.5-1 light beam solidification width of offset,
Light beam solidification scan path is obtained, by light beam solidification scan path, internally normal direction deviates 0.5-1 light beam solidification width,
Obtain DLP solidification inner boundary；
Three, three-dimensional digital model is placed in workbench, DLP is carried out to the inside for solidifying inner boundary DLP using DLP lamp group
Solidification, obtains consolidation zone, meanwhile, DLP solidification side caused by being spread in the external generation that DLP solidifies inner boundary as halation
Boundary scans light beam along light beam solidification scan path using the light beam of scanning galvanometer control laser boundary scan lamp group, obtains three
The exterior contour region of dimension word model, partial region and DLP in exterior contour region solidify border overlay, by consolidation zone
It is connect with exterior contour region.
The present invention is calculated edge cure halation sprawling solidification distance, makes by studying single DLP edge cure situation
The light beam solidification width for reducing offset is less than halation sprawling solidification distance, with reach the interior zone boundary of three-dimensional digital model with
It is overlapped that three-dimensional digital model contour edge scans influence area.
Compared with prior art, the present invention carrying out slicing treatment to three-dimensional digital model first, three-dimensional digital model is obtained
Then interior zone and edge contour carry out data processing to three-dimensional digital model interior zone and edge contour respectively, obtain
Light beam solidifies scan path and DLP solidifies inner boundary, finally, carrying out DLP solidification in the inside that DLP solidifies inner boundary, obtains
To consolidation zone, is scanned using scanning galvanometer control light beam along light beam solidification scan path, obtain the outside of three-dimensional digital model
Contour area, partial region and DLP in exterior contour region solidify border overlay, consolidation zone and exterior contour region are connected
It connects；Its scientific in principle is reliable, and solidification process is simple, increases single light beam on the basis of existing DLP light group module and scanning is shaken
Mirror module is sliced figure by every layer of threedimensional model and is handled to obtain three-dimensional digital model interior zone and contour edge,
Interior zone is solidified by DLP light source respectively, scanning galvanometer controls light beam consolidated profile edge, can effectively improve existing DLP
The surface quality of light source photocuring increasing material manufacturing reduces subsequent processing process.
Detailed description of the invention:
Fig. 1 is the edge schematic diagram for the three-dimensional digital model that the embodiment of the present invention 1 is related to.
Fig. 2 is the boundary condition schematic diagram after the three-dimensional digital model DLP photocuring that the embodiment of the present invention 1 is related to.
Fig. 3 is the boundary condition signal after the three-dimensional digital model scanning galvanometer light beam that the embodiment of the present invention 1 is related to solidifies
Figure.
Fig. 4 is the three-dimensional digital model solidification process schematic diagram that the embodiment of the present invention 1 is related to.
Specific embodiment:
The present invention is described further by way of example and in conjunction with the accompanying drawings.
Embodiment 1:
The technical process for the DLP photocuring increasing material manufacturing surface quality improvement method that the present embodiment is related to are as follows:
Three-dimensional digital model is sliced using computer, obtains the exterior contour 1 of three-dimensional digital model；
According to DLP light beam solid state, determine that light beam solidifies width；
The exterior contour 1 of three-dimensional digital model is prolonged into inside normal direction and deviates half of light beam solidification width, obtains light beam
Solidify scan path 2, light beam solidification scan path 2 is prolonged into inside normal direction and deviates half of light beam solidification width, it is solid to obtain DLP
Change inner boundary 3；
Three-dimensional digital model is placed in workbench 10, the inside for solidifying inner boundary 3 DLP is carried out using DLP lamp group 8
DLP solidification, obtains consolidation zone 4, meanwhile, DLP caused by being spread in the external generation that DLP solidifies inner boundary 3 as halation consolidates
Change boundary 5；
Light beam is scanned along light beam solidification scan path 2 using the light beam of scanning galvanometer control laser boundary scan lamp group 9,
The exterior contour region 6 of three-dimensional digital model is obtained, the partial region 7 in exterior contour region 6 is Chong Die with the solidification boundary 5 DLP,
Consolidation zone 4 is connect with exterior contour region 6.
Claims (1)
1. a kind of DLP photocuring increasing material manufacturing surface quality improvement method, it is characterised in that technical process are as follows:
One, slicing treatment is carried out to three-dimensional digital model using computer, by single layer three-dimensional digital model slice of data, obtained
Three-dimensional digital model interior zone and three-dimensional digital model contour edge；
Two, by the exterior contour of three-dimensional digital model, internally normal direction reduces 0.5-1 light beam solidification width of offset, obtains
Light beam solidifies scan path, and by light beam solidification scan path, internally normal direction deviates 0.5-1 light beam solidification width, obtains
DLP solidifies inner boundary；
Three, three-dimensional digital model is placed in workbench, it is solid to carry out DLP to the inside for solidifying inner boundary DLP using DLP lamp group
Change, obtains consolidation zone, meanwhile, DLP solidification boundary caused by being spread in the external generation that DLP solidifies inner boundary as halation,
Light beam is scanned along light beam solidification scan path using the light beam of scanning galvanometer control laser boundary scan lamp group, obtains three dimensions
The exterior contour region of word model, partial region and DLP in exterior contour region solidify border overlay, by consolidation zone and outer
The connection of contouring region.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110406097A (en) * | 2019-07-16 | 2019-11-05 | 安徽卓锐三维科技有限公司 | A kind of compound 3D printing method and system |
| CN111745959A (en) * | 2020-07-06 | 2020-10-09 | 北京金达雷科技有限公司 | 3D printing method and 3D printing equipment |
| CN113954366A (en) * | 2020-07-20 | 2022-01-21 | 上海普利生机电科技有限公司 | Photocuring three-dimensional printing method, device and equipment with reinforced bottom fine lines |
| CN114379095A (en) * | 2021-12-07 | 2022-04-22 | 宁波智造数字科技有限公司 | Method for correcting n-butanol phenomenon in photocuring 3D printing |
| CN115592953A (en) * | 2021-06-28 | 2023-01-13 | 广州黑格智造信息科技有限公司（Cn） | Curing processing method, system and device for 3D printing and storage medium |
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| CN107244069A (en) * | 2017-04-18 | 2017-10-13 | 佛山市中山大学研究院 | A kind of large format DLP 3 D-printing devices |
| CN107718535A (en) * | 2017-09-29 | 2018-02-23 | 深圳晗竣雅科技有限公司 | DLP photocureable rapid shapings border processing method and device |
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| CN1769032A (en) * | 2004-10-29 | 2006-05-10 | 谭昊涯 | Quick forming method by adoption of projection technique |
| CN107244069A (en) * | 2017-04-18 | 2017-10-13 | 佛山市中山大学研究院 | A kind of large format DLP 3 D-printing devices |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110406097A (en) * | 2019-07-16 | 2019-11-05 | 安徽卓锐三维科技有限公司 | A kind of compound 3D printing method and system |
| CN111745959A (en) * | 2020-07-06 | 2020-10-09 | 北京金达雷科技有限公司 | 3D printing method and 3D printing equipment |
| CN111745959B (en) * | 2020-07-06 | 2022-06-28 | 优你造科技(北京)有限公司 | 3D printing method and 3D printing equipment |
| CN113954366A (en) * | 2020-07-20 | 2022-01-21 | 上海普利生机电科技有限公司 | Photocuring three-dimensional printing method, device and equipment with reinforced bottom fine lines |
| CN113954366B (en) * | 2020-07-20 | 2023-10-13 | 上海普利生机电科技有限公司 | Light-cured three-dimensional printing method, device and equipment with reinforced bottom thin lines |
| CN115592953A (en) * | 2021-06-28 | 2023-01-13 | 广州黑格智造信息科技有限公司（Cn） | Curing processing method, system and device for 3D printing and storage medium |
| CN115592953B (en) * | 2021-06-28 | 2024-03-12 | 广州黑格智造信息科技有限公司 | Curing processing method, system, device and storage medium for 3D printing |
| CN114379095A (en) * | 2021-12-07 | 2022-04-22 | 宁波智造数字科技有限公司 | Method for correcting n-butanol phenomenon in photocuring 3D printing |
| CN114379095B (en) * | 2021-12-07 | 2024-03-05 | 宁波智造数字科技有限公司 | Method for correcting Tyndall phenomenon in photo-curing 3D printing |
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Application publication date: 20190507 |