CN107901423A - The 3D printing method of heterogeneous filler - Google Patents
The 3D printing method of heterogeneous filler Download PDFInfo
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- CN107901423A CN107901423A CN201711308602.3A CN201711308602A CN107901423A CN 107901423 A CN107901423 A CN 107901423A CN 201711308602 A CN201711308602 A CN 201711308602A CN 107901423 A CN107901423 A CN 107901423A
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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
- B33Y10/00—Processes of 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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Abstract
The present invention provides a kind of 3D printing method of heterogeneous filler, it is related to 3D printing technique field, the 3D printing method of the heterogeneous filler includes：Receive and read the threedimensional model file of article to be processed, it is layered according to the threedimensional model that reading threedimensional model file obtains, printing path is planned according to the Density Distribution Feature of the short transverse of threedimensional model and/or width, 3D printing is carried out according to printing path.The 3D printing method of heterogeneous filler provided by the invention, independently defined using printing path with the method for packed density optimization realize heterogeneous complicated filling inside printed product, internal aperture channel size gradient combination, to meet printed product internal structure to particular/special requirements such as Mechanics of Machinery, fluid dynamics, functional characteristics, realize the flexible print of printing product, solve existing printing path planning and printing equipment lays particular stress on the surface resolution accuracy of printed product, and ignore the functional characteristic problem of printed product internal structure.
Description
Technical field
The present invention relates to a kind of 3D printing method of 3D printing technique field, more particularly to heterogeneous filler.
Background technology
3D printing technique, also known as rapid shaping technique (Rapid Prototyping, abbreviation RP) and increasing material manufacturing
(Additive Manufacturing, AM) is a kind of using point-by-point or successively forming method manufacture molds and products advanced
Manufacturing technology, it is using the thought of discrete/accumulation molding as foundation stone, and whole process can be divided into departure process and banking process two is big
Step, wherein, discrete and banking process is that passage path generation software is achieved, it is by the 3-dimensional digital mould of initial design
Type, by " cutting burst ", forms blocks of thin slice；Then it is filled using filling algorithm, generation motion controller is known
Other path file.Motion controller controlled motion component, drive equipped with printed material printing head according to path file into
Stroke control is moved, and carries out the printing of model；The accessory control component of pilot controller control at the same time, coordinates printing head control
Various environmental conditions in printing.
Therefore, coordinates measurement software determines that printer apparatus finally prints the structure of physical model, conventional path
Generation software (delamination software) have it is a variety of, as Slic3r, Skeinforge, Cura kisslicer, Printrun,
Repeteir-host, Octoprint, Botqueue, Make-me etc., its paths planning method, can only plan such as Zigzag side
Method, filling mode include：It is arc-shaped, broken line type, hexagon etc., but Route Generation software is mainly characterized by equidistantly filling out at present
Fill, filling spacing is fixed, it is impossible to is met the demand of the complicated porous gradient-structure of printing, is only focused on surface in printed product synusia
The accuracy of resolution ratio, and have ignored the functional characteristic of internal structure.For example, nature bone is by regularly arranged hone lamella and system of Harvard
System is formed, and outer layer is fine and close, hard, thick, is cortex bone, internal layer arrangement is loose, is cancellous bone in cellular.On the other hand, can not yet
Reach the perfect biomimetic features and print quality of biomaterial needs.
The content of the invention
It is an object of the invention to provide a kind of 3D printing method of heterogeneous filler, independently defined using printing path and
The method of packed density optimization realizes heterogeneous complicated filling inside printed product, the gradient group of internal aperture channel size
Close, to meet that printed product internal structure to particular/special requirements such as Mechanics of Machinery, fluid dynamics, functional characteristics, realizes printing system
The flexible print of product, solves existing printing path planning and printing equipment lays particular stress on the surface resolution accuracy of printed product, and
Ignore the functional characteristic problem of printed product internal structure.
In a first aspect, a kind of 3D printing method of heterogeneous filler provided by the invention, including：Receive and read to be processed
The threedimensional model file of article；
It is layered according to the threedimensional model that the reading threedimensional model file obtains；
Printing path is planned according to the Density Distribution Feature of the short transverse of the threedimensional model and/or width；
3D printing is carried out according to the printing path.
With reference to first aspect, an embodiment of the present invention provides the first possible embodiment of first aspect, wherein, root
The step of printing path being planned according to the Density Distribution Feature of the threedimensional model short transverse, including：
The height and the number of plies of monolayer slices are determined according to the Density Distribution Feature of the threedimensional model short transverse；Described
The Density Distribution Feature of short transverse, vertical section are multiple monolayer slices groups with equal densities feature or different densities feature
The aggregate of synthesis；
Path parameter is determined according to the height, the number of plies and Density Distribution Feature of the monolayer slices, to obtain the planning
Path.
With reference to first aspect, an embodiment of the present invention provides second of possible embodiment of first aspect, wherein, root
The step of printing path being planned according to the Density Distribution Feature of the threedimensional model width, including：
Density function and the density function are determined according to the Density Distribution Feature of the threedimensional model width
Parameter；The density function includes：Constant function, polynomial function, trigonometric function, normal distyribution function, bias function or put
Ray function；
The pad parameter that the parameter substitution density function of the density function is obtained to adjacent lines is described to obtain
Path planning.
With reference to first aspect, an embodiment of the present invention provides the third possible embodiment of first aspect, wherein, it is single
The density function of the width of layer section can use a kind of density function or a variety of density functions to be combined.
With reference to first aspect, an embodiment of the present invention provides the 4th kind of possible embodiment of first aspect, wherein, when
When the density function is constant function, the constant function is a fixed numbers.
With reference to first aspect, an embodiment of the present invention provides the 5th kind of possible embodiment of first aspect, wherein, when
When the density function is polynomial function, the multinomial letter for f (x)=arg [1]+| arg [2]+arg [3] * x+arg
[4]*x2+ ... |, wherein arg [1], arg [2], arg [3] and arg [4] they are input parameter.
With reference to first aspect, an embodiment of the present invention provides the 6th kind of possible embodiment of first aspect, wherein, when
When the density function is trigonometric function, the trigonometric function for y=arg [1]+| arg [2] * sin (arg [2] * x+arg [4])
+ arg [5] |, wherein arg [1], arg [2], arg [3], arg [4], arg [5] they are input parameter.
With reference to first aspect, an embodiment of the present invention provides the 7th kind of possible embodiment of first aspect, wherein, when
When the density function is normal distyribution function, the normal distyribution function isWherein
μ, σ are input parameter.
With reference to first aspect, an embodiment of the present invention provides the 8th kind of possible embodiment of first aspect, wherein, institute
When the density function stated is bias function, the bias function is fstep(x), wherein step [1], step [2], step [3]
It is input parameter with step [4], parameter value is equal to apart from outer contour relative distance, can be according to specific requirements, sets itself.
With reference to first aspect, an embodiment of the present invention provides the 9th kind of possible embodiment of first aspect, wherein, institute
When the density function stated is radiates line function, the radiation line function is fray(x), wherein arg [1], arg [2], arg [3]
It is input parameter with arg [4], parameter value is equal to the angle value of opposite starting radioactive ray, and value range is in 0-360, Ke Yiyi
According to specific requirements, sets itself.
An embodiment of the present invention provides a kind of 3D printing method of heterogeneous filler, by receiving and reading article to be processed
Threedimensional model file, and be layered according to the threedimensional model that the threedimensional model file of reading obtains, determine fabrication orientation
Afterwards, printing path is planned according to the Density Distribution Feature of the short transverse of threedimensional model and/or width, and according to planning
Printing path carries out 3D printing.Aforesaid way can be according to the short transverse of article to be processed and/or the density point of width
Cloth feature carries out printing path planning, and then can realize sample equidistant filling mode and/or non-equidistantly filling mode
Printing, solves sample to the specific demands such as Mechanics of Machinery, fluid dynamics, functional characteristic, and printing flexible, porous well
The technical problem of structure.
Other feature and advantage disclosed by the invention will illustrate in the following description, alternatively, Partial Feature and advantage
Can deduce from specification or unambiguously determine, or by implement the disclosure above-mentioned technology it can be learnt that.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in describing below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
Put, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of flow diagram of the 3D printing method of heterogeneous filler provided in an embodiment of the present invention；
Fig. 2 is the flow diagram of the 3D printing method of another heterogeneous filler provided in an embodiment of the present invention；
Fig. 3 is the flow diagram of the 3D printing method of another heterogeneous filler provided in an embodiment of the present invention；
Fig. 4 is the flow diagram of the 3D printing method of another heterogeneous filler provided in an embodiment of the present invention；
A kind of flow diagram of the 3D printing device of Fig. 5 heterogeneous fillers provided in an embodiment of the present invention.
Fig. 6 is the flow diagram of longitudinal section provided in an embodiment of the present invention filling；
Fig. 7 is a kind of schematic diagram of situation of short transverse density planning mode provided in an embodiment of the present invention；
Fig. 8 is the schematic diagram of another situation of short transverse density planning mode provided in an embodiment of the present invention；
Fig. 9 is the correspondence figure provided in an embodiment of the present invention filled with polynomial function；
Figure 10 is the correspondence figure provided in an embodiment of the present invention filled with trigonometric function；
Figure 11 corresponds to figure for the cylinder model provided in an embodiment of the present invention filled with bias function；
Figure 12 corresponds to figure for the similar wooden club shape model provided in an embodiment of the present invention filled with bias function；
Figure 13 corresponds to figure for the cylinder model provided in an embodiment of the present invention filled to radiate line function；
Figure 14 corresponds to figure for the similar wooden club shape model provided in an embodiment of the present invention filled to radiate line function；
Figure 15 combination fillings provided in an embodiment of the present invention between bias function and radiation line function different layers obtain
Cylinder model corresponds to figure；
Figure 16 combination fillings provided in an embodiment of the present invention between bias function and radiation line function different layers obtain
Similar wooden club shape model corresponds to figure.
Icon：10- receives read module；20- is layered judgment module；30- path planning modules；
40- execution modules.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiment is part of the embodiment of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower all other embodiments obtained, belong to the scope of protection of the invention.
Coordinates measurement software determines that printer apparatus finally prints the structure of physical model, and conventional path generation is soft
Part (delamination software) is such as：ACES, QuickCast of 3DSYSTEM companies；The LOMSlice of Helisys companies；DTM companies
Rapid Tool；QuickSlice, SupportWorks, AutoGell of Stratasys companies；Cutibal companies
SoliderDFE, Sander；ProtoBuild and ProtoSupport of Prototype companies etc., pursuit is printed product
Surface resolution accuracy, its paths planning method, can only plan that such as Zigzag methods, filling mode include：It is arc-shaped, folding
Line style, hexagon etc., its feature filling spacing parameter is all filling spacing that is equidistant, not changing, it is impossible to meets printing
Complicated loose structure.For example, nature bone is made of regularly arranged hone lamella with havers' system, outer layer is fine and close, hard, thick, is skin
Matter bone, internal layer arrangement is loose, is cancellous bone in cellular.On the other hand, also it is unable to reach the perfect imitative of biomaterial needs
Raw structure and print quality.Based on this, a kind of 3D printing method of heterogeneous filler provided in an embodiment of the present invention, the technology
Corresponding software or hardware realization can be used.Describe in detail below to the embodiment of the present invention.
Embodiment one
A kind of 3D printing method flow diagram of heterogeneous filler shown in Figure 1, this method by 3D printer processing
Device performs, and comprises the following steps：
Step S102, receives and reads the threedimensional model file of article to be processed.
Before being printed, receive and read the threedimensional model file of article to be processed, the data format of threedimensional model is more
Sample, such as CAD model, cloud data model, STL models etc., this sentences STL models for example, when being printed, incites somebody to action
The Three-dimensional Design Softwares such as 3DMAX, AutoCAD, Solidworks, Maya are converted into stl file, afterwards by the three-dimensional of STL forms
Model file is imported into the softwares such as Cura, Repetier Host to generate the gcode codes that 3D printer can perform.
Step S104, is layered according to the threedimensional model that reading threedimensional model file obtains.
When being layered to threedimensional model, placement position, direction by adjusting the threedimensional model of STL forms can be with
With reference to the shape of article to be processed, the comfort level of printing, such as the precision of article surface, support volume, structure are considered
Time, wastage in bulk or weight etc., and then determine fabrication orientation；Threedimensional model is layered further according to the fabrication orientation.
Step S106, print path is planned according to the Density Distribution Feature of the short transverse of threedimensional model and/or width
Footpath.
When carrying out path planning, threedimensional model is known as individual layer for a series of two-dimentional aspect and cut along a direction is discrete
Piece, identical monolayer slices is packed together to obtain short transverse, monolayer slices different parts have different Density Distribution spies
Sign, monolayer slices different parts are accumulated as width.Wherein, Density Distribution Feature is that the structure composition of article is special
Point, for example, the sectional drawing outer layer of bone section is fine and close, hard, thick, it is cortex bone, internal layer arrangement is loose, is cancellous bone in cellular
Biomimetic features.
Step S108,3D printing is carried out according to printing path.
After planning printing path according to the Density Distribution Feature of the short transverse of threedimensional model and/or width, 3D is beaten
Print machine carries out 3D printing according to printing path.
An embodiment of the present invention provides a kind of 3D printing method of heterogeneous filler, by receiving and reading article to be processed
Threedimensional model file, and be layered according to the threedimensional model that the threedimensional model file of reading obtains, determine fabrication orientation
Afterwards, printing path is planned according to the Density Distribution Feature of the short transverse of threedimensional model and/or width, and according to planning
Printing path carries out 3D printing.Aforesaid way can be according to the short transverse of article to be processed and/or the density point of width
Cloth feature carries out printing path planning, and then can realize sample equidistant filling mode and/or non-equidistantly filling mode
Printing, solves sample to the specific demands such as Mechanics of Machinery, fluid dynamics, functional characteristic, and printing flexible, porous well
The technical problem of structure.
Wherein, in step S106 the step of the Density Distribution Feature planning printing path of threedimensional model short transverse, including：
(1), the height and the number of plies of monolayer slices are determined according to the Density Distribution Feature of threedimensional model short transverse.
(2), the Density Distribution Feature of short transverse, vertical section are that multiple have equal densities feature or different densities feature
The aggregate that is combined into of monolayer slices；
(3), path parameter is determined according to the height, the number of plies and Density Distribution Feature of monolayer slices, to obtain path planning.
Schematic diagram shown in Figure 6, the short transverse of defined herein threedimensional model is longitudinal section direction, according to man-machine friendship
Mutual data, set first segment floor height parameter, that is, the height for setting monolayer slices is Zmin1, wherein, longitudinal section is that multiple have phase
The aggregate being combined into the monolayer slices of density feature or different densities feature, therefore, can be according to the list of multiple repetitions
It is h that layer section, which sets the cross section of the first unit piecewise combination,1, and h1=n*Zmin1(n >=1, n round numbers).Similarly, setting the
Two sections of floor height parameters, that is, the height for setting monolayer slices is Zmin2, according to the monolayer slices of multiple repetitions, the second unit point is set
The cross section of Duan Zuhe is h2, and h2=n*Zmin2(n >=1, n round numbers), according to above-mentioned set-up mode and so on, set whole
The height of a article to be processed is H, and obtains H=∑s h1+h2…+hn。
Wherein, in step S106 the step of the Density Distribution Feature planning printing path of threedimensional model width, including：
(1), the Density Distribution Feature of the threedimensional model width of basis determines the parameter of density function and density function；
Density function includes：Constant function, polynomial function, trigonometric function, normal distyribution function, bias function or radiation line function.
(2), the parameter of density function is substituted into density function and obtains the pad parameters of adjacent lines to obtain path planning.
The width of defined herein threedimensional model is cross-sectional direction, since monolayer slices different parts are with different
Density Distribution Feature, i.e. monolayer slices have different filling spacing.According to human-machine interaction data, when carrying out 3D printing, root
The parameter of density function and density function is determined according to the Density Distribution Feature of the cross section of threedimensional model, density function includes：Often
The functions such as number function, polynomial function, trigonometric function, normal distyribution function, bias function or radiation line function, using different
Density function carries out layered shaping to the cross section of article to be processed.
Such as when being filled using polynomial function, when spacing form is with (arg [1], arg [2], arg [3], arg
[4] ... it is) input parameter of density function polynomial function, one multinomial of setting is：
F (x)=arg [1]+| arg [2]+arg [3] * x+arg [4] * x2+ ... |, establish a polynomial function mathematical modulo
Type obtains polynomial function y=f (x), and joins using the numerical result of polynomial function y=f (x) as the filling of adjacent lines
Number, is filled.
Such as when being filled using trigonometric function, when spacing form with (arg [1], arg [2], arg [3], arg [4],
Arg [5]) be density function trigonometric function input parameter, establish a trigonometric function model, obtain trigonometric function y=arg
[1]+| arg [2] * sin (arg [3] * x+arg [4])+arg [5] |, establish a trigonometric function mathematical model and obtain trigonometric function
Y=f (x), and be filled using the numerical result of polynomial function y=f (x) as the pad parameter of adjacent lines.
Such as when being filled using normal function, when spacing form is using μ, σ as the defeated of density function normal distyribution function
Enter parameter, establish a normal distyribution function model, obtain normal distyribution functionEstablish one
A normal distyribution function mathematical model obtains normal distyribution function y=f (x), and is used as adjacent lines using the numerical result of y=f (x)
The pad parameter of bar, is filled.
Such as when being filled using bias function, when spacing form is with step [1], step [2], step [3] and step
[4] it is the input parameter of density function bias function, establishes a bias function model fstep (x), be according to existing contour line
Base profile line, bias function inwardly bias, generation biasing wheel according to side pair-wise offset method according to offset parameter table
Profile is the path of bias function planning, is filled.
Such as using when radiating line function and being filled, when spacing form with step [1], step [2], step [3] and
Step [4] is the input parameter that density function radiates line function, a radioactive ray function model fray (x) is established, according to existing
Contour line inwardly biases central point as central point, to X-axis positive direction as 0 direction of radioactive ray, counterclockwise according to radioactive ray
Parameter list carries out rotation processing, and generation radiation lines are the path for radiating line function planning, are filled.
An embodiment of the present invention provides a kind of 3D printing method of heterogeneous filler, passes through the threedimensional model text according to reading
The threedimensional model that part obtains is layered, and according to the short transverse of threedimensional model and/or the Density Distribution Feature of width
Printing path is planned, so that a complete article all has different density in cross section (monolayer slices) and longitudinal section
Distribution characteristics, it is flexible to the specific demands such as Mechanics of Machinery, fluid dynamics, functional characteristic, and printing to solve sample well
The technical problem of loose structure.
Embodiment two
A kind of 3D printing method flow diagram of heterogeneous filler shown in Figure 2, this method by 3D printer processing
Device performs, according to the step of the Density Distribution Feature of the short transverse of threedimensional model and width planning printing path, including：
Step S201, draws the threedimensional model of article to be processed.
Wherein, the data format of the threedimensional model of article to be processed is various, for example, CAD model, cloud data model,
STL models etc., this sentences the illustration of STL models.
Step S202, stl file is converted to by drawn threedimensional model.
Step S203, reads the stl file of article to be processed.
Step S204, is layered according to the threedimensional model that the stl file of reading obtains.
Step S205, printing path is planned according to the Density Distribution Feature of the short transverse of threedimensional model.
Wherein, the step of Density Distribution Feature planning printing path of threedimensional model short transverse, including：
(1), the height and the number of plies of monolayer slices are determined according to the Density Distribution Feature of threedimensional model short transverse.
(2), path parameter is determined according to the height of monolayer slices and the number of plies, to obtain path planning.
Step S206, printing path is planned according to the Density Distribution Feature of the width of threedimensional model.
Wherein, the parameter of density function and density function is determined according to the Density Distribution Feature of threedimensional model width；
Density function includes：Constant function, polynomial function, trigonometric function, normal distyribution function, bias function or radiation line function；
The parameter of density function is substituted into density function and obtains the pad parameters of adjacent lines to obtain path planning.
Step S207,3D printing is carried out according to printing path.
An embodiment of the present invention provides a kind of 3D printing method of heterogeneous filler, passes through the threedimensional model text according to reading
The threedimensional model that part obtains is layered, and is planned according to the short transverse of threedimensional model and the Density Distribution Feature of width
Printing path, so that a complete article all has different Density Distributions in cross section (monolayer slices) and longitudinal section
Feature, solves sample to the specific demands such as Mechanics of Machinery, fluid dynamics, functional characteristic, and printing flexible, porous well
The technical problem of structure.
Embodiment three
A kind of 3D printing method flow diagram of heterogeneous filler shown in Figure 3, this method by 3D printer processing
Device performs, according to the step of the Density Distribution Feature of the short transverse of threedimensional model planning printing path, including：
Step S301, draws the threedimensional model of article to be processed.
Step S302, stl file is converted to by drawn threedimensional model.
Step S303, reads the stl file of article to be processed.
Step S304, is layered according to the threedimensional model that the stl file of reading obtains.
Step S305, printing path is planned according to the Density Distribution Feature of the short transverse of threedimensional model.
Wherein, the step of Density Distribution Feature planning printing path of threedimensional model short transverse, including：
(1), the height and the number of plies of monolayer slices are determined according to the Density Distribution Feature of threedimensional model short transverse.
(2), path parameter is determined according to the height of monolayer slices and the number of plies, to obtain path planning.
Step S306,3D printing is carried out according to printing path.
With reference to Fig. 7, the longitudinal section of the Density Distribution of short transverse is that multiple have equal densities feature or different densities
The aggregate that the monolayer slices of feature are combined into.Following parameter list is set, that is, it is 5 sections to set segments:
First segment floor height Zmin1=1mm, the number of plies 5, single hop height h1=5mm；
Second segment floor height Zmin2=0.5mm, the number of plies 6, single hop height h2=4mm；
3rd section of floor height Zmin3=0.1mm, the number of plies 20, single hop height h3=2mm；
4th section of floor height Zmin4=0.4mm, the number of plies 10, single hop height h4=4mm；
5th section of floor height Zmin5=1mm, the number of plies 6, single hop height h5=6mm；Model total height is 20mm.
With reference to Fig. 8, the longitudinal section of the Density Distribution of short transverse is that multiple have equal densities feature or different densities
The aggregate that the monolayer slices of feature are combined into.Following parameter list is set, that is, it is 6 sections to set segments:
First segment floor height Zmin1=1mm, the number of plies 1, single hop height h1=1mm；
Second segment floor height Zmin2=0.2mm, the number of plies 10, single hop height h2=2mm；
3rd section of floor height Zmin3=0.5mm, the number of plies 6, single hop height h3=3mm；
4th section of floor height Zmin4=1mm, the number of plies 7, single hop height h4=7mm；
5th section of floor height Zmin5=0.4mm, the number of plies 10, single hop height h5=4mm；
6th section of floor height Zmin6=0.1mm, the number of plies 30, single hop height h6=3mm；Model total height is 20mm.
An embodiment of the present invention provides a kind of 3D printing method of heterogeneous filler, passes through the threedimensional model text according to reading
The threedimensional model that part obtains is layered, and plans printing path according to the Density Distribution Feature of the short transverse of threedimensional model,
So that a complete article has different Density Distribution Features in longitudinal section, it is effective in biological 3D printing
Inhomogeneity is printed than combination of materials, and then provides a kind of path parameter more optimized so that the article printed can
Reach perfect biomimetic features and the requirement of print quality of biomaterial needs.
Example IV
A kind of 3D printing method flow diagram of heterogeneous filler shown in Figure 4, this method by 3D printer processing
Device performs, according to the step of the Density Distribution Feature of the width of threedimensional model planning printing path, including：
Step S401, draws the threedimensional model of article to be processed.
Step S402, stl file is converted to by drawn threedimensional model.
Step S403, reads the stl file of article to be processed.
Step S404, is layered according to the threedimensional model that the stl file of reading obtains.
Step S405, printing path is planned according to the Density Distribution Feature of the width of threedimensional model.
Wherein, the parameter of density function and density function is determined according to the Density Distribution Feature of threedimensional model width；
Density function includes：Constant function, polynomial function, trigonometric function, normal distyribution function, bias function or radiation line function；
With reference to Fig. 9, wherein, it is filled using polynomial function for example, setting spacing form as (arg [1], arg
[2], arg [3], arg [4] ...), polynomial function formula can be expressed as：
Y=arg [1]+| arg [2]+arg [3] * x+arg [4] * x2+ ... |, import the cube mould of 20*20*5
Type, it is density function to set wherein one layer of y=abs (x), once inputs five parameters, is respectively arg [1]=0；Arg [2]=
0；Arg [3]=1；Arg [4]=0；Arg [5]=0, it is 0.5mm to take x and sampling interval, corresponding Y value is 0.5mm, 1mm,
1.5mm, 2mm ... show that the layer is every as shown in figure 9, on the basis of line at central point and Fig. 9 intensifications and to both sides extension extension
The spacing of root silk is that 0.5mm, 1mm, 1.5mm, 2mm ... Fig. 9 are design sketch when two layers of angle is 90 ° under the spacing.
With reference to Figure 10, wherein, it is filled using trigonometric function for example, spacing form is (arg [1], arg [2], arg
[3], arg [4], arg [5]), herein it should be noted that five parameters can only be inputted, trigonometric function formula can be expressed as：
Y=arg [1]+| arg [2] * sin (arg [3] * x+arg [4])+arg [5] |, cube of one 20*20*5 of importing
Body Model, it is density function to set y=abs (sin (x+1.57)), and five parameters sequentially input are arg [1]=0；arg[2]
=1；Arg [3]=1；Arg [4]=1.57；Arg [5]=0, it is identical with polynomial function, with line at central point and Figure 10 intensifications
On the basis of, setting 0.094rad is sampling interval, can obtain the interlamellar spacing, and Figure 10 is that two layers of angle is 90 ° of effect under the spacing
Fruit is schemed.The outer close interior loose interstitital texture of class bone section demand can be realized by being filled by trigonometric function.
With reference to Figure 11, wherein, it is filled using bias function for example, setting offset parameter sheet format as (step
[1], step [2], step [3], step [4] ...), it is basic contour line according to existing contour line, bias function is equidistant according to side
Deflection method, inwardly biases according to offset parameter, and generation biasing contour line is the path of bias function planning.
The cylinder model of φ 40 is imported, wherein one layer of offset parameter is set according to list：
| step[n] | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| mm | 1 | 1 | 1 | 1.5 | 2 | 2 | 2 | 2 | 2 | 2 |
Obtain the design sketch of the fill path such as Figure 11.
The model of a similar wooden club shape is imported, wherein one layer of offset parameter is set according to list：
| step[n] | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| mm | 2 | 2 | 2 | 2 | 2 | 5 | 5 | 10 | 10 | 12 |
Obtain the design sketch of the fill path such as Figure 12.
With reference to Figure 13, wherein, it is filled using radiating line function for example, setting radiation beam parameter sheet format as (arg
[1], arg [2], arg [3], arg [4] ...), central point is inwardly biased as central point according to existing contour line, it is square to X-axis
To as 0 direction of radioactive ray, rotation processing is carried out according to radiation beam parameter table counterclockwise, generation radiation lines are radioactive ray
The path of function planning.
The cylinder model of φ 20 is imported, wherein one layer of radiation beam parameter is set according to list：
Obtain the design sketch of the fill path such as Figure 13.
The model of a similar wooden club shape is imported, wherein one layer of radiation beam parameter is set according to list：
Obtain the design sketch of the fill path such as Figure 14.
With reference to Figure 15, wherein, with bias function and radiation line function, different interlayer alternate combinations, generate biasing-radioactive ray
The path planning of composite function filling.Obtain the design sketch of the fill path such as figure.
Can any two kinds of various combinations between function or many kinds of function, reach increasingly complex function filling combination.
The cylinder model of φ 40 is imported, two layers of its interval is set, respectively according to radiation line function and biasing
Function processing, according to each parameter according to list：
Obtain the design sketch of the fill path such as Figure 15.
The model of a similar wooden club shape is imported, two layers of its interval is set, respectively according to radiation line function and biasing letter
Number processing, according to each parameter according to list：
Obtain the design sketch of the fill path such as Figure 16.
The parameter of density function is substituted into density function and obtains the pad parameters of adjacent lines to obtain path planning.
Step S406,3D printing is carried out according to printing path.
An embodiment of the present invention provides a kind of 3D printing method of heterogeneous filler, passes through the threedimensional model text according to reading
The threedimensional model that part obtains is layered, and plans printing path according to the Density Distribution Feature of the width of threedimensional model,
So that a complete article has different Density Distribution Features in cross section (monolayer slices), solves sample well
Product are to the specific demands such as Mechanics of Machinery, fluid dynamics, functional characteristic, and the technical problem of printing flexible, porous structure.
Embodiment five
A kind of flow chart of the 3D printing realization device of heterogeneous filler shown in Figure 5, corresponds to institute in embodiment one
A kind of 3D printing method of the heterogeneous filler provided, an embodiment of the present invention provides a kind of 3D printing dress of heterogeneous filler
Put, which includes：
Read module 10 is received, for receiving and reading the threedimensional model file of article to be processed；
Judgment module 20 is layered, for the threedimensional model obtained according to reading, is layered；
Path planning module 30, is planned for the Density Distribution Feature of the height according to threedimensional model and/or width
Printing path；
Execution module 40, for carrying out 3D printing according to printing path.
The 3D printing device of above-mentioned heterogeneous filler provided in an embodiment of the present invention, by receiving and reading article to be processed
Threedimensional model file, such as stl file obtains threedimensional model according to the stl file of reading, and by adjusting threedimensional model
Placement position, direction are to determine fabrication orientation, after determining fabrication orientation, according to the short transverse and/or width of threedimensional model
The Density Distribution Feature planning printing path in direction, and carry out 3D printing according to the printing path of planning.Aforesaid way being capable of root
Printing path planning is carried out according to the short transverse of article to be processed and/or the Density Distribution Feature of width, is solved well
Sample is to the specific demands such as Mechanics of Machinery, fluid dynamics, functional characteristic, and the technical problem of printing flexible, porous structure.
The technique effect of the device that the present embodiment is provided, its realization principle and generation is identical with previous embodiment, for letter
Describe, device embodiment part does not refer to part, refers to corresponding contents in preceding method embodiment.
Finally it should be noted that：Embodiment described above, is only the embodiment of the present invention, to illustrate the present invention
Technical solution, rather than its limitations, protection scope of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that：Any one skilled in the art
The invention discloses technical scope in, it can still modify the technical solution described in previous embodiment or can be light
It is readily conceivable that change, or equivalent substitution is carried out to which part technical characteristic；And these modifications, change or replacement, do not make
The essence of appropriate technical solution departs from the spirit and scope of technical solution of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of 3D printing method of heterogeneous filler, it is characterised in that including：Receive and read the three-dimensional mould of article to be processed
Type file；
It is layered according to the threedimensional model that the reading threedimensional model file obtains；
Printing path is planned according to the Density Distribution Feature of the short transverse of the threedimensional model and/or width；
3D printing is carried out according to the printing path.
It is 2. according to the method described in claim 1, it is characterized in that, special according to the Density Distribution of the threedimensional model short transverse
The step of sign planning printing path, including：
The height and the number of plies of monolayer slices are determined according to the Density Distribution Feature of the threedimensional model short transverse；The height
The Density Distribution Feature in direction, vertical section are that multiple monolayer slices with equal densities feature or different densities feature are combined into
Aggregate；
Path parameter is determined according to the height, the number of plies and Density Distribution Feature of the monolayer slices, to obtain the path planning.
3. method according to claim 1 or 2, it is characterised in that according to the density of the threedimensional model width point
The step of cloth Identity Plan printing path, including：
The parameter of density function and the density function is determined according to the Density Distribution Feature of the threedimensional model width；
The density function includes：Constant function, polynomial function, trigonometric function, normal distyribution function, bias function or radiation
Line function；
The parameter of the density function is substituted into the density function and obtains the pad parameters of adjacent lines to obtain the planning
Path.
4. according to the method described in claim 3, it is characterized in that, the density function of the width of monolayer slices can use
A kind of density function or a variety of density functions are combined.
5. according to the method described in claim 3, it is characterized in that, when the density function is constant function, the constant
Function is a fixed numbers.
It is 6. described more according to the method described in claim 3, it is characterized in that, when the density function is polynomial function
Formula letter for f (x)=arg [1]+| arg [2]+arg [3] * x+arg [4] * x2+ ... |, wherein arg [1], arg [2], arg [3]
It is input parameter with arg [4].
7. according to the method described in claim 3, it is characterized in that, when the density function is trigonometric function, the triangle
Function for y=arg [1]+| arg [2] * sin (arg [3] * x+arg [4])+arg [5] |, wherein arg [1], arg [2], arg
[3], arg [4], arg [5] are input parameter.
8. according to the method described in claim 3, it is characterized in that, when the density function is normal distyribution function, institute
The normal distyribution function stated isWherein μ, σ are input parameter.
9. according to the method described in claim 3, it is characterized in that, when the density function is bias function, described is inclined
It is f to put functionstep(x), wherein step [1], step [2], step [3] and step [4] are input parameter, parameter value be equal to away from
, can be according to specific requirements, sets itself from outer contour relative distance.
10. according to the method described in claim 3, it is characterized in that, the density function for radiation line function when, it is described
Radiation line function is fray(x), wherein arg [1], arg [2], arg [3] and arg [4] are input parameter, and parameter value is equal to phase
Angle value to originating radioactive ray, value range, can be according to specific requirements, sets itselfs in 0-360.
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| CN109080131A (en) * | 2018-10-18 | 2018-12-25 | 珠海赛纳打印科技股份有限公司 | 3 D-printing method and device |
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