CN109532006A - A kind of adaptive thickness dicing method and print system - Google Patents
A kind of adaptive thickness dicing method and print system Download PDFInfo
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- CN109532006A CN109532006A CN201811382783.9A CN201811382783A CN109532006A CN 109532006 A CN109532006 A CN 109532006A CN 201811382783 A CN201811382783 A CN 201811382783A CN 109532006 A CN109532006 A CN 109532006A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000003044 adaptive effect Effects 0.000 title claims abstract description 24
- 238000007639 printing Methods 0.000 claims abstract description 23
- 238000003860 storage Methods 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 6
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 238000010146 3D printing Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000016 photochemical curing Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
- B29C64/129—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask
- B29C64/135—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask the energy source being concentrated, e.g. scanning lasers or focused light sources
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
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- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
The present invention provides a kind of adaptive thickness dicing method and print systems comprising: obtain the threedimensional model of object to be printed；The d with identical thickness h is turned to by threedimensional model is discrete1、d2、……dnLayer model obtains the perpendicular bisector of threedimensional model, centered on perpendicular bisector, threedimensional model is divided with equal angular, obtains several terrace cut slices；Several layers are turned to by terrace cut slice is discrete with identical thickness h, obtain several comparison points on the contour line of terrace cut slice；It is linked to be an oblique line between two neighboring comparison point on each terrace cut slice, calculates the angle a of oblique line and horizontal direction；Several angles a is compared with threshold value S, judges whether corresponding adjacent two layers merge slice.The threedimensional model that the present invention treats printing objects carries out the self-adapting slicing of different thickness, and provides print system and directly to print the layer model of adaptive thickness, under the premise of not influencing printing precision and printing objects quality, accelerates print speed.
Description
Technical field
The present invention relates to a kind of adaptive thickness dicing method and print systems.
Background technique
3D photocuring printing technique is a kind of using laser irradiation photosensitive resin material, and liquid resin is made to be rapidly solidificated into production
The product rapid shaping technique of product shape；It is based on mathematical model, using liquid photosensitive resin as material, by successively printing
Mode construct object.
The printing of 3D photocuring needs to obtain the three-dimensional modeling data of object to be printed, then will before starting " printing " object
Threedimensional model is sliced, and each layer of layer model for needing to print is obtained.Each layer model is generated purple by setting print parameters
The raster scanning line of outer laser beam scan path.It again can be along the raster scanning line of each layer model, to liquid by ultraviolet laser
Resin is scanned one by one, and the thin resin layer being scanned can generate polymerization reaction, is gradually formed face by line, is ultimately formed part
A thin layer solidification section, and the resin not being scanned keeps original liquid.
Nowadays, the application of 3D photocuring printing technique is generally existing, and advantage is it is clear that such as printing precision height, structure
Finely and the part of complexity is easy to make etc..
But current 3D printing, by the limitation of slice and print system, slice can only be cut according to identical thickness
Piece, and when print system printing, the printing of identical thickness can only be carried out according to identical print parameters, so that print speed
Slowly, it is difficult to meet production efficiency requirement.
Chinese patent 201810159843.4 discloses a kind of 3D printing lift height self-adapting slicing method, including following
Step: stl file data are obtained；Input the maximum thickness and minimum thickness of customized slice；Selected positive direction；Obtain triangle
Analog value of three vertex of dough sheet on positive direction respective coordinates axis, takes its minimum value, is ranked up to triangle surface；It obtains
The altitude range of 3D printing model；Section minimum M inZ is assigned to current Z axis coordinate value NowZ；It counts in 3D printing model
Across the triangle surface for the horizontal plane that Z axis coordinate is NowZ, the thickness h 0 of corresponding triangle surface is calculated；By current Z axis
The value of coordinate value NowZ increases h0, makees the horizontal plane that Z axis coordinate is NowZ；Step is repeated, other layer heights and plane are calculated；
When the value of NowZ is more than or equal to section maximum value MaxZ, terminates and repeat, and export slice of data.
Summary of the invention
In view of the shortcomings of the prior art, it the object of the present invention is to provide a kind of adaptive thickness dicing method, treats and beats
The threedimensional model of print object carries out the self-adapting slicing of different thickness, and when providing print system and allowing to carry out printing, right
The layer model of adaptive thickness directly prints, and under the premise of not influencing printing precision and printing objects quality, accelerates printing
Speed.
To achieve the goals above, the present invention provides a kind of adaptive thickness dicing methods comprising following steps:
S1, the threedimensional model for obtaining object to be printed；The d with identical thickness h is turned to by threedimensional model is discrete1、
d2、……dnLayer model stores the thickness of each layer model；
S2, the geometric center point for obtaining threedimensional model, are obtained geometric center and the perpendicular bisector parallel with Z axis；It hangs down in
Centered on line, threedimensional model is divided with equal angular, obtains several terrace cut slices；
S3, with identical thickness h by several discrete for turning to several layers, obtaining on the contour line of terrace cut slice of terrace cut slice
Comparison point；
It is linked to be an oblique line between two neighboring comparison point on S4, each terrace cut slice, calculates oblique line and horizontal direction
Angle a；And it obtains in several terrace cut slices of same layer, the average value or maximum value of angle a；
S5, step S4 is calculated, the average value or maximum value of several angles a is compared with threshold value S:
In threshold value, then corresponding adjacent two layers merge slice, and the layer model that the adjacent two layers of thickness are corresponded in step S1 retains one
A layer model, corresponding thickness are superimposed and are stored as merging the thickness of the layer model of slice；Until slice is completed.
In the present invention, by first that threedimensional model is identical to be stored as multiple thickness after identical thickness progress discretization
Layer model, then threedimensional model is subjected to terrace cut slice, it is compared with the comparison point on terrace cut slice, and identical with layer model
Thickness be arranged comparison point so that comparison point comparison result is corresponding with layer model；Corresponding layer is judged according to comparison result
Whether model merges, and can merge, then in the layer model of step S1 storage, retains a layer model, be superimposed the thickness of merging
As the thickness information for merging layer model and store.
In the present invention, the comparison of adjacent layer model, with the angle of the slope line calculations and horizontal direction that are linked to be between comparison point
Judged, deterministic process is direct, as a result accurately.
Another specific embodiment according to the present invention, threshold value S are 85 ° -95 °.
Another specific embodiment according to the present invention, in step S5, the merging of adjacent layer is equipped with and merges number of plies upper limit m, closes
And number of plies upper limit m is 2-5 layers.
Another specific embodiment according to the present invention further comprises following steps in step S5:
S501, compare dnLayer and dn+1Whether layer merges, and compares dn+1Layer and dn+2Whether layer merges ... ..., compares dn+m-1Layer
With dn+mWhether layer merges, above to merge, then dnLayer is to dn+mIt is laminated simultaneously；
S502、dn+mLayer no longer with dn+m+1Layer compares, further progress dn+m+1Layer and dn+m+2The comparison of layer.
Another specific embodiment according to the present invention further comprises following steps in step S5:
S511, successively compare whether two adjacent layers merge；Obtain annexable total number of plies between several adjacent layers；
S512, by annexable total number of plies, according to number of plies upper limit m is merged, respectively or partly respectively, what planning need to merge
Layer.
The present invention is based on the restrictions for merging the number of plies, two different merging treatment processes are provided, according to the knot of printing objects
Structure feature selects one of which to be handled.
Another specific embodiment according to the present invention, in self-adapting slicing method, according to the properity of object to be printed
It is required that the layer that selection needs to merge slice carries out self-adopt combination.
Another specific embodiment according to the present invention merges slice in step S5, further comprises following steps:
S52, the combined layer model of needs is obtained；The layer model merged as needed obtains the layer model for needing to retain:
The number of plies for merging layer model is odd number, retains intermediate one layer of layer model；
The number of plies for merging layer model is even number, retains any layer model in two layers intermediate.Another mesh of the invention
The print system that is printed after being to provide a kind of slice for adaptive thickness dicing method comprising printer host
And host computer, host computer are connected with processor.
Another specific embodiment, processor include: according to the present invention
Storage allocation location, storage allocation location are configured as dynamically being divided according to the content and quantity of store tasks
With memory block；
Model import unit, model import unit are configured as the layer model after being sliced adaptive thickness and are directed respectively into certainly
In the dynamic dynamic memory generated, the corresponding dynamic memory of a layer model, and stored in corresponding dynamic memory
The thickness parameter of layer model；
Parameter set unit, parameter set unit are configured as being required according to printing, and print parameters are arranged；
Print unit is called, print unit is called to be configured as according to page order, in dynamic call dynamic memory
Layer model is generated rasterisation scan line according to print parameters, and the layer model in dynamic memory, printing is joined by layer model
Number, thickness parameter, rasterisation scan line send laser galvanometer board and motion control board to, successively print.
The present invention is described in further detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the step schematic diagram of the adaptive thickness dicing method of embodiment 1；
Fig. 2 is the memory distribution schematic diagram of the print system of embodiment 1；
Fig. 3 is the printing schematic diagram of the print system of embodiment 1.
Specific embodiment
Embodiment 1
Present embodiments provide a kind of adaptive thickness dicing method, as shown in Figure 1, itself the following steps are included:
S1, the threedimensional model for obtaining object to be printed；The d with identical thickness h is turned to by threedimensional model is discrete1、
d2、……dnLayer model stores the thickness of each layer model；
S2, the geometric center point for obtaining threedimensional model, are obtained geometric center and the perpendicular bisector parallel with Z axis；It hangs down in
Centered on line, threedimensional model is divided with equal angular, obtains several terrace cut slices；
S3, with identical thickness h by several discrete for turning to several layers, obtaining on the contour line of terrace cut slice of terrace cut slice
Comparison point；
It is linked to be an oblique line between two neighboring comparison point on S4, each terrace cut slice, calculates oblique line and horizontal direction
Angle a；And it obtains in several terrace cut slices of same layer, the average value or maximum value of angle a；
S5, step S4 is calculated, the average value or maximum value of several angles a is compared with threshold value S, threshold
Value S is 85 ° -95 °；In threshold value, then corresponding adjacent two layers merge slice, and adjacent the two of thickness are corresponded in step S1
The layer model of layer retains a layer model, and corresponding thickness is superimposed and is stored as merging the thickness of the layer model of slice；Until cutting
Piece is completed.
Wherein, the merging of adjacent layer is equipped with and merges number of plies upper limit m, and merging number of plies upper limit m is 2-5 layers.
Further comprise following steps when merging layer processing:
S501, compare dnLayer and dn+1Whether layer merges, and compares dn+1Layer and dn+2Whether layer merges ... ..., compares dn+m-1Layer
With dn+mWhether layer merges, above to merge, then dnLayer is to dn+mIt is laminated simultaneously；
S502、dn+mLayer no longer with dn+m+1Layer compares, further progress dn+m+1Layer and dn+m+2The comparison of layer.
Meanwhile as the case may be, when merging layer processing, following steps be may also comprise:
S511, successively compare whether two adjacent layers merge；Obtain annexable total number of plies between several adjacent layers；
S512, by annexable total number of plies, according to number of plies upper limit m is merged, respectively or partly respectively, what planning need to merge
Layer.
The present embodiment provides two different merging treatment processes, according to printing objects based on the restriction for merging the number of plies
Design feature selects one of which to be handled.
Based on the restriction for merging the number of plies, obtains and need combined layer model；The layer model merged as needed, is further obtained
The layer model that must need to retain:
The number of plies for merging layer model is odd number, retains intermediate one layer of layer model；
The number of plies for merging layer model is even number, retains any layer model in two layers intermediate.
In the present embodiment, by first that threedimensional model is identical to be stored as multiple thickness after identical thickness progress discretization
Layer model, then threedimensional model is subjected to terrace cut slice, is compared with the comparison point on terrace cut slice, and with layer model phase
Comparison point is arranged in same thickness, so that comparison point comparison result is corresponding with layer model；Judged according to comparison result corresponding
Whether layer model merges, and can merge, then in the layer model of step S1 storage, retains a layer model, be superimposed the layer of merging
Thickness is as the thickness information for merging layer model and stores.
In the present embodiment, the comparison of adjacent layer model, with the folder of the slope line calculations and horizontal direction that are linked to be between comparison point
Angle is judged that deterministic process is direct, as a result accurately.
In self-adapting slicing method, according to the properity of object to be printed require, selection need merge slice layer into
Row self-adopt combination.
The present embodiment additionally provides a kind of print system printed after being sliced for adaptive thickness dicing method,
Including printer host and host computer, host computer is connected with processor.
Processor includes:
Storage allocation location, storage allocation location are configured as dynamically being divided according to the content and quantity of store tasks
With memory block；
Model import unit, model import unit are configured as the layer model after being sliced adaptive thickness and are directed respectively into certainly
In the dynamic dynamic memory generated, the corresponding dynamic memory of a layer model, and stored in corresponding dynamic memory
The thickness parameter of layer model；Multiple memory blocks are dynamically generated in dynamic memory, for storing layer model and thickness respectively
Parameter.
Parameter set unit, parameter set unit are configured as being required according to printing, and print parameters are arranged；
Print unit is called, print unit is called to be configured as according to page order, in dynamic call dynamic memory
Layer model is generated rasterisation scan line according to print parameters, and rasterisation scan line is stored in dynamic memory by layer model
In.Meanwhile layer model includes contour vector and supporting vector, and contour vector and supporting vector can be stored respectively to a storage
Area.Dynamic memory in the present embodiment is assigned to contour vector memory block, supporting vector memory block, thickness memory block and sweeps
Line vector memory block is retouched, referring to fig. 2.
Calling print unit further includes by the layer model in dynamic memory, print parameters, thickness parameter, rasterisation scanning
Line sends laser galvanometer board and motion control board to, successively prints.
The print system of the present embodiment, specific print procedure are as follows: referring to Fig. 3, every model from level to level of self-adapting slicing
Thickness it is different, successively call rasterisation scan line, the thickness parameter, layer model in each dynamic memory, control respectively
Web plate drops at the position D1, D2, D3, prints according to corresponding rasterisation scan line, until printing is completed.
Although the present invention is disclosed above in the preferred embodiment, it is not intended to limit the invention the range of implementation.Any
The those of ordinary skill in field is not departing from invention scope of the invention, improves when can make a little, i.e., all according to this hair
Bright done same improvement, should be the scope of the present invention and is covered.
Claims (9)
1. a kind of adaptive thickness dicing method, which is characterized in that the adaptive thickness dicing method the following steps are included:
S1, the threedimensional model for obtaining object to be printed；The d with identical thickness h is turned to by the threedimensional model is discrete1、
d2、……dnLayer model stores the thickness of each layer model；
S2, the geometric center point for obtaining the threedimensional model, are obtained geometric center and the perpendicular bisector parallel with Z axis；With described
Centered on perpendicular bisector, the threedimensional model is divided with equal angular, obtains several terrace cut slices；
S3, several layers are turned to for the terrace cut slice is discrete with identical thickness h, if obtaining on the contour line of the terrace cut slice
Dry comparison point；
Be linked to be an oblique line between the two neighboring comparison point on S4, each terrace cut slice, calculate the oblique line with
The angle a of horizontal direction；And it obtains in several terrace cut slices of same layer, the average value or maximum value of angle a；
S5, step S4 is calculated, the average value or maximum value of several angles a is compared with threshold value S: in threshold value
Interior, then corresponding adjacent two layers merge slice, and the layer model that the adjacent two layers of thickness are corresponded in step S1 retains a layer
Model, corresponding thickness are superimposed and are stored as merging the thickness of the layer model of slice；Until slice is completed.
2. adaptive thickness dicing method as described in claim 1, which is characterized in that the threshold value S is 85 ° -95 °.
3. adaptive thickness dicing method as described in claim 1, which is characterized in that in the step S4, the conjunction of adjacent layer
And be equipped with and merge number of plies upper limit m, the merging number of plies upper limit m is 2-5 layers.
4. adaptive thickness dicing method as claimed in claim 3, which is characterized in that in the step S5, further comprise
Following steps:
S501, compare dnLayer and dn+1Whether layer merges, and compares dn+1Layer and dn+2Whether layer merges ... ..., compares dn+m-1Layer with
dn+mWhether layer merges, above to merge, then dnLayer is to dn+mIt is laminated simultaneously；
S502、dn+mLayer no longer with dn+m+1Layer compares, further progress dn+m+1Layer and dn+m+2The comparison of layer.
5. adaptive thickness dicing method as claimed in claim 3, which is characterized in that in the step S5, further comprise
Following steps:
S511, successively compare whether two adjacent layers merge；Obtain annexable total number of plies between several adjacent layers；
S512, by annexable total number of plies, according to the merging number of plies upper limit m, respectively or partly respectively, planning needs to close
And layer.
6. adaptive thickness dicing method as described in claim 1, which is characterized in that in the self-adapting slicing method, root
According to the properity requirement of object to be printed, the layer that selection needs to merge slice carries out self-adopt combination.
7. adaptive thickness dicing method as described in claim 4 or 5, which is characterized in that merged in the step S5
Slice, further comprises following steps:
S52, the combined layer model of needs is obtained；The layer model merged as needed obtains the layer model for needing to retain:
The number of plies for merging layer model is odd number, retains intermediate one layer of layer model；
The number of plies for merging layer model is even number, retains any layer model in two layers intermediate.
8. the print system printed after a kind of any adaptive thickness dicing method slice for claim 1-7,
It is characterized in that, the print system includes printer host and host computer, the host computer is connected with processor.
9. print system as claimed in claim 8, which is characterized in that the processor includes:
Storage allocation location, the storage allocation location are configured as dynamically being divided according to the content and quantity of store tasks
With memory block；
Model import unit, the model import unit are configured as the layer model after being sliced adaptive thickness and are directed respectively into certainly
In the dynamic dynamic memory generated, the corresponding dynamic memory of a layer model, and stored in corresponding dynamic memory
The thickness parameter of layer model；
Parameter set unit, the parameter set unit are configured as being required according to printing, and print parameters are arranged；
Print unit is called, the calling print unit is configured as according to page order, in dynamic call dynamic memory
Layer model, by the layer model according to the print parameters generate rasterisation scan line, and by dynamic memory layer model,
Print parameters, thickness parameter, rasterisation scan line send laser galvanometer board and motion control board to, successively print.
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| CN111016179A (en) * | 2019-12-02 | 2020-04-17 | 西安铂力特增材技术股份有限公司 | Variable-layer-thickness subdivision calculation method based on additive manufacturing |
| CN111209678A (en) * | 2020-01-13 | 2020-05-29 | 中国建筑第八工程局有限公司 | Reinforcing rib arrangement system and method for building 3D printing slice |
| CN112008074A (en) * | 2020-09-03 | 2020-12-01 | 苏州复浩三维科技有限公司 | 3D printing method and device applied to metal material |
| CN113619122A (en) * | 2021-08-25 | 2021-11-09 | 珠海赛纳三维科技有限公司 | Three-dimensional object printing method, device, equipment and storage medium |
| CN113844035A (en) * | 2021-10-19 | 2021-12-28 | 郑州市中心医院 | A three-dimensional image processing method and system applied to zygomatic 3D printing |
| CN114043728A (en) * | 2021-11-16 | 2022-02-15 | 深圳拓竹科技有限公司 | 3D printer, method and device for same, 3D printing system and storage medium |
| WO2022132461A1 (en) | 2020-12-14 | 2022-06-23 | Entegris, Inc. | Multi-layer composites with varied layer thicknesses, and related methods |
| CN114850497A (en) * | 2022-05-19 | 2022-08-05 | 深圳市华阳新材料科技有限公司 | Alternate forming printing method |
| CN117207529A (en) * | 2023-09-28 | 2023-12-12 | 绿钥生物科技(广州)有限公司 | A volumetric bioprinting control method |
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