CN107901423B - The 3D printing method of heterogeneous filler - Google Patents
The 3D printing method of heterogeneous filler Download PDFInfo
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- CN107901423B CN107901423B CN201711308602.3A CN201711308602A CN107901423B CN 107901423 B CN107901423 B CN 107901423B CN 201711308602 A CN201711308602 A CN 201711308602A CN 107901423 B CN107901423 B CN 107901423B
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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 methods of heterogeneous filler, it is related to 3D printing technique field, the 3D printing method of the heterogeneous filler includes: reception and the threedimensional model file for reading article to be processed, it is layered according to the threedimensional model that threedimensional model file obtains is read, printing path is planned according to the Density Distribution Feature of the short transverse of threedimensional model and/or width direction, carries out 3D printing according to printing path.The 3D printing method of heterogeneous filler provided by the invention, it is independently defined using printing path and the method for packed density optimization realizes the gradient combination of heterogeneous complicated filling inside printed product, internal aperture channel size, 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, it 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.
Description
Technical field
The present invention relates to 3D printing technique field more particularly to a kind of 3D printing methods of heterogeneous filler.
Background technique
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 the advanced of point-by-point or layer-by-layer forming method manufacture molds and products
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 generates software and is achieved, it is by the 3-dimensional digital mould of initial design
Type forms blocks of thin slice by " cutting fragment "；Then it is filled using filling algorithm, generates motion controller and know
Other path file.Motion controller control moving parts, drive equipped with printed material printing head according to path file into
Stroke control is mobile, carries out the printing of model；Pilot controller controls accessory control component, cooperation printing head control simultaneously
Various environmental conditions in printing.
Therefore, coordinates measurement software determines that printer apparatus finally prints the structure of physical model, conventional path
Generate software (delamination software) there are many, as Slic3r, Skeinforge, Cura kisslicer, Printrun,
Repeteir-host, Octoprint, Botqueue, Make-me etc., paths planning method can only plan such as the side Zigzag
Method, filling mode include: arc-shaped, broken line type, hexagon etc., but Route Generation software is mainly characterized by equidistantly filling out at present
It fills, filling spacing is fixed, and is not able to satisfy 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 bone plate and system, Harvard
System is constituted, and outer layer is fine and close, hard, thick, is cortex bone, and internal layer arrangement is loose, is in cellular, is cancellous bone.On the other hand, can not yet
Reach the perfect biomimetic features and print quality of biomaterial needs.
Summary of the invention
The purpose of the present invention is to provide a kind of 3D printing methods of heterogeneous filler, independently defined using printing path and
The gradient group of heterogeneous complicated filling, internal aperture channel size inside the method realization printed product of packed density optimization
It closes, to meet 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, comprising: receive and read to be processed
The threedimensional model file of article；
It is layered according to the threedimensional model that the threedimensional model file obtains is read；
Printing path is planned according to the Density Distribution Feature of the short transverse of the threedimensional model and/or width direction；
3D printing is carried out according to the printing path.
With reference to first aspect, the embodiment of the invention provides the first possible embodiments of first aspect, wherein root
The step of planning printing path according to the Density Distribution Feature of the threedimensional model short transverse, comprising:
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, longitudal 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, the embodiment of the invention provides second of possible embodiments of first aspect, wherein root
The step of planning printing path according to the Density Distribution Feature of the threedimensional model width direction, comprising:
Density function and the density function are determined according to the Density Distribution Feature of the threedimensional model width direction
Parameter；The density function include: constant function, polynomial function, trigonometric function, normal distyribution function, bias function or put
Ray function；
The parameter of the density function is substituted into the density function, and to obtain the pad parameter of adjacent lines described to obtain
Planning path.
With reference to first aspect, the embodiment of the invention provides the third possible embodiments of first aspect, wherein single
The density function of the width direction of layer slice can be combined using a kind of density function or a variety of density functions.
With reference to first aspect, the embodiment of the invention provides the 4th kind of possible embodiments of first aspect, wherein when
When the density function is constant function, the constant function is a fixed numbers.
With reference to first aspect, the embodiment of the invention provides the 5th kind of possible embodiments of first aspect, wherein when
The density function be polynomial function when, the multinomial letter be 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, the embodiment of the invention provides the 6th kind of possible embodiments of first aspect, wherein when
The density function be trigonometric function when, the trigonometric function be 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, the embodiment of the invention provides the 7th kind of possible embodiments of first aspect, wherein when
When the density function is normal distyribution function, the normal distyribution function isIts
Middle μ, σ are input parameter.
With reference to first aspect, the embodiment of the invention provides the 8th kind of possible embodiments 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 profile relative distance, can be according to specific requirements, sets itself.
With reference to first aspect, the embodiment of the invention provides the 9th kind of possible embodiments of first aspect, wherein institute
When the density function stated is radiation 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.
The embodiment of the invention provides a kind of 3D printing methods 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 direction, 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 direction
Cloth feature carries out printing path planning, and then the equidistant filling mode of sample and/or non-equidistant filling mode may be implemented
Printing, very good solution sample is to the specific demands such as Mechanics of Machinery, fluid dynamics, functional characteristic, and printing flexible, porous
The technical issues 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 be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these 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 Fig. 5 flow diagram of the 3D printing device of heterogeneous filler 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 to be provided in an embodiment of the present invention with the cylinder model that bias function is filled；
Figure 12 corresponds to figure to be provided in an embodiment of the present invention with the similar wooden club shape model that bias function is filled；
Figure 13 corresponds to figure to be provided in an embodiment of the present invention to radiate the cylinder model that line function is filled；
Figure 14 corresponds to figure to be provided in an embodiment of the present invention to radiate the similar wooden club shape model that line function is filled；
Figure 15 is provided in an embodiment of the present invention to be obtained with combination filling between bias function and radiation line function different layers
Cylinder model corresponds to figure；
Figure 16 is provided in an embodiment of the present invention to be obtained with combination filling between bias function and radiation line function different layers
Similar wooden club shape model corresponds to figure.
Icon: 10- receives read module；20- is layered judgment module；30- path planning module；
40- execution module.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments 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
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Coordinates measurement software determines that printer apparatus finally prints the structure of physical model, and conventional path generates soft
Part (delamination software) is such as: ACES, QuickCast of 3DSYSTEM company；The LOMSlice of Helisys company；DTM company
Rapid Tool；QuickSlice, SupportWorks, AutoGell of Stratasys company；Cutibal company
SoliderDFE, Sander；ProtoBuild and ProtoSupport of Prototype company etc., pursuit is printed product
Surface resolution accuracy, paths planning method can only plan that such as Zigzag method, filling mode includes: arc-shaped, folding
Line style, hexagon etc., feature filling spacing parameter are all at equal intervals that the filling spacing not changed is not able to satisfy printing
Complicated porous structure.For example, nature bone is made of regularly arranged bone plate with havers' system, outer layer is fine and close, hard, thick, is skin
Matter bone, internal layer arrangement is loose, is in cellular, is cancellous bone.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.It describes 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 executes, comprising the following steps:
Step S102 receives and reads the threedimensional model file of article to be processed.
Before being printed, the threedimensional model file of article to be processed is received and reads, the data format of threedimensional model is more
Sample, such as CAD model, point cloud data model, STL model etc., this sentences STL model for example, inciting somebody to action when being printed
The Three-dimensional Design Softwares such as 3DMAX, AutoCAD, Solidworks, Maya are converted into stl file, later by the three-dimensional of STL format
Model file is imported into the softwares such as Cura, Repetier Host to generate the executable gcode code of 3D printer.
Step S104 is layered according to the threedimensional model that threedimensional model file obtains is read.
When being layered to threedimensional model, placement position, direction by adjusting the threedimensional model of STL format can be with
In conjunction with the shape of article to be processed, the comfort level of printing, such as the precision of article surface, support volume, building are comprehensively 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 plans print path according to the Density Distribution Feature of the short transverse of threedimensional model and/or width direction
Diameter.
When carrying out path planning, threedimensional model is known as single layer for a series of two-dimentional level and cut along a direction is discrete
Identical monolayer slices are packed together to obtain short transverse by piece, and monolayer slices different parts have different Density Distributions special
Sign, monolayer slices different parts are accumulated as width direction.Wherein, Density Distribution Feature is that the structure composition of article is special
Point, for example, the screenshot outer layer of bone section is fine and close, hard, thick, it is cortex bone, it is cancellous bone that it is in cellular that internal layer arrangement is loose
Biomimetic features.
Step S108 carries out 3D printing according to printing path.
After planning printing path according to the Density Distribution Feature of the short transverse of threedimensional model and/or width direction, 3D is beaten
Print machine carries out 3D printing according to printing path.
The embodiment of the invention provides a kind of 3D printing methods 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 direction, 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 direction
Cloth feature carries out printing path planning, and then the equidistant filling mode of sample and/or non-equidistant filling mode may be implemented
Printing, very good solution sample is to the specific demands such as Mechanics of Machinery, fluid dynamics, functional characteristic, and printing flexible, porous
The technical issues of structure.
Wherein, the step of Density Distribution Feature of threedimensional model short transverse plans printing path in step S106, comprising:
(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, longitudal section are multiple with 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 of monolayer slices, the number of plies and Density Distribution Feature, to obtain planning path.
The short transverse of schematic diagram shown in Figure 6, defined herein threedimensional model is longitudinal section direction, according to man-machine friendship
Mutual data, set first segment layer high parameter, i.e. the height of setting monolayer slices is Zmin1, wherein longitudinal section is multiple with phase
It, therefore, can be according to multiple duplicate lists with the aggregate that the monolayer slices of density feature or different densities feature are combined into
The cross section of layer slice the first unit piecewise combination of setting is h1, and h1=n*Zmin1(n >=1, n round numbers).Similarly, setting the
Two sections of layer high parameters, the i.e. height of setting monolayer slices are Zmin2, according to multiple duplicate monolayer slices, the second unit point is set
The cross section of Duan Zuhe is h2, and h2=n*Zmin2(n >=1, n round numbers) is arranged whole according to above-mentioned set-up mode
The height of a article to be processed is H, and obtains H=∑ h1+h2…+hn。
Wherein, the step of Density Distribution Feature of threedimensional model width direction plans printing path in step S106, comprising:
(1), the Density Distribution Feature of the threedimensional model width direction 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 parameter of adjacent lines to obtain planning path.
The width direction 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: normal
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 format is with (arg [1], arg [2], arg [3], arg
[4] ... it is) the input parameter of density function polynomial function, a multinomial is set are as follows:
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 format 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] |, it establishes a trigonometric function mathematical model and obtains 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 format is using μ, σ as the defeated of density function normal distyribution function
Enter parameter, establishes a normal distyribution function model, obtain normal distyribution functionEstablish one
A normal distyribution function mathematical model obtains normal distyribution function y=f (x), and using the numerical result of y=f (x) as adjacent lines
The pad parameter of item, is filled.
Such as when being filled using bias function, when spacing format 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 are inwardly biased according to offset parameter table according to side pair-wise offset method, generate biasing wheel
Profile is the path of bias function planning, is filled.
Such as using radiation line function be filled when, when spacing format 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 point centered on 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 generating radiation lines is the path for radiating line function planning, is filled.
The embodiment of the invention provides a kind of 3D printing methods of heterogeneous filler, pass through the threedimensional model text according to reading
The threedimensional model that part obtains is layered, and according to the Density Distribution Feature of the short transverse of threedimensional model and/or width direction
Printing path is planned, so that a complete article all has different density in cross section (monolayer slices) and longitudinal section
Distribution characteristics, very good solution sample are flexible to the specific demands such as Mechanics of Machinery, fluid dynamics, functional characteristic, and printing
The technical issues of porous structure.
Embodiment two
A kind of 3D printing method flow diagram of heterogeneous filler shown in Figure 2, this method by 3D printer processing
The step of device executes, and plans printing path according to the Density Distribution Feature of the short transverse of threedimensional model and width direction, comprising:
Step S201 draws the threedimensional model of article to be processed.
Wherein, the data format of the threedimensional model of article to be processed be multiplicity, such as CAD model, point cloud data model,
STL model etc., this sentences the illustration of STL model.
The threedimensional model drawn is converted to stl file by step S202.
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 plans printing path according to the Density Distribution Feature of the short transverse of threedimensional model.
Wherein, the Density Distribution Feature of threedimensional model short transverse plans the step of printing path, comprising:
(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 planning path.
Step S206 plans printing path according to the Density Distribution Feature of the width direction of threedimensional model.
Wherein, the parameter of density function and density function is determined according to the Density Distribution Feature of threedimensional model width direction；
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 parameter of adjacent lines to obtain planning path.
Step S207 carries out 3D printing according to printing path.
The embodiment of the invention provides a kind of 3D printing methods of heterogeneous filler, pass through the threedimensional model text according to reading
The threedimensional model that part obtains is layered, and is planned according to the Density Distribution Feature of the short transverse of threedimensional model and width direction
Printing path, so that a complete article all has different Density Distributions in cross section (monolayer slices) and longitudinal section
Feature, very good solution sample is to the specific demands such as Mechanics of Machinery, fluid dynamics, functional characteristic, and printing flexible, porous
The technical issues 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
The step of device executes, and plans printing path according to the Density Distribution Feature of the short transverse of threedimensional model, comprising:
Step S301 draws the threedimensional model of article to be processed.
The threedimensional model drawn is converted to stl file by step S302.
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 plans printing path according to the Density Distribution Feature of the short transverse of threedimensional model.
Wherein, the Density Distribution Feature of threedimensional model short transverse plans the step of printing path, comprising:
(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 planning path.
Step S306 carries out 3D printing according to printing path.
Referring to Fig. 7, the longitudinal section of the Density Distribution of short transverse is multiple with equal densities feature or different densities
The aggregate that the monolayer slices of feature are combined into.Following parameter list is set, i.e. setting segments is 5 sections:
The high Zmin1=1mm of first segment layer, the number of plies 5, single hop height h1=5mm；
The high Zmin2=0.5mm of second segment layer, the number of plies 6, single hop height h2=4mm；
The high Zmin3=0.1mm of third section layer, the number of plies 20, single hop height h3=2mm；
The 4th section of high Zmin4=0.4mm of layer, the number of plies 10, single hop height h4=4mm；
The 5th section of high Zmin5=1mm of layer, the number of plies 6, single hop height h5=6mm；Model total height is 20mm.
Referring to Fig. 8, the longitudinal section of the Density Distribution of short transverse is multiple with equal densities feature or different densities
The aggregate that the monolayer slices of feature are combined into.Following parameter list is set, i.e. setting segments is 6 sections:
The high Zmin1=1mm of first segment layer, the number of plies 1, single hop height h1=1mm；
The high Zmin2=0.2mm of second segment layer, the number of plies 10, single hop height h2=2mm；
The high Zmin3=0.5mm of third section layer, the number of plies 6, single hop height h3=3mm；
The 4th section of high Zmin4=1mm of layer, the number of plies 7, single hop height h4=7mm；
The 5th section of high Zmin5=0.4mm of layer, the number of plies 10, single hop height h5=4mm；
The 6th section of high Zmin6=0.1mm of layer, the number of plies 30, single hop height h6=3mm；Model total height is 20mm.
The embodiment of the invention provides a kind of 3D printing methods of heterogeneous filler, pass 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 more optimized path parameter, enables the article printed
Reach the perfect biomimetic features of biomaterial needs and the requirement of print quality.
Example IV
A kind of 3D printing method flow diagram of heterogeneous filler shown in Figure 4, this method by 3D printer processing
The step of device executes, and plans printing path according to the Density Distribution Feature of the width direction of threedimensional model, comprising:
Step S401 draws the threedimensional model of article to be processed.
The threedimensional model drawn is converted to stl file by step S402.
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 plans printing path according to the Density Distribution Feature of the width direction of threedimensional model.
Wherein, the parameter of density function and density function is determined according to the Density Distribution Feature of threedimensional model width direction；
Density function includes: constant function, polynomial function, trigonometric function, normal distyribution function, bias function or radiation line function；
Referring to Fig. 9, wherein be filled with polynomial function for example, it is (arg [1], arg that spacing format, which is arranged,
[2], [3] arg, 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, wherein one layer of y=abs (x) is density function for setting, once inputs five parameters, respectively arg [1]=0；Arg [2]=
0；Arg [3]=1；Arg [4]=0；Arg [5]=0, taking x and sampling interval is 0.5mm, corresponding Y value be 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 intensification and to both sides extension extension
The spacing of root silk is that 0.5mm, 1mm, 1.5mm, 2mm ... Fig. 9 are effect picture under the spacing, when two layers of angle is 90 °.
Referring to Fig.1 0, wherein be filled with trigonometric function for example, spacing format is (arg [1], arg [2], arg
[3], [4] arg, arg [5]), herein it should be noted that five parameters can only be inputted, trigonometric function formula be can be expressed as:
Y=arg [1]+| arg [2] * sin (arg [3] * x+arg [4])+arg [5] |, import cube of a 20*20*5
Body Model, setting y=abs (sin (x+1.57)) are density function, 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 intensification
On the basis of, setting 0.094rad is sampling interval, can obtain the interlamellar spacing, and Figure 10 is the effect that two layers of angle is 90 ° under the spacing
Fruit figure.The outer close interior loose interstitital texture that can be realized class bone section demand is filled by trigonometric function.
Referring to Fig.1 1, wherein be filled with bias function for example, it is (step that offset parameter sheet format, which is arranged,
[1], [2] step, step [3], step [4] ...), it is basic contour line according to existing contour line, bias function is equidistant according to side
Deflection method is inwardly biased according to offset parameter, generates the path that biasing contour line is bias function planning.
Import the cylinder model of a φ 40, setting wherein one layer of offset parameter 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 effect picture of the fill path such as Figure 11.
Import the model of a similar wooden club shape, setting wherein one layer of offset parameter 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 effect picture of the fill path such as Figure 12.
Referring to Fig.1 3, wherein be filled with radiating line function for example, radiation beam parameter sheet format is arranged as (arg
[1], [2] arg, arg [3], arg [4] ...), point centered on central point is inwardly biased according to existing contour line, to X-axis pros
To as 0 direction of radioactive ray, rotation processing is carried out according to radiation beam parameter table counterclockwise, generating radiation lines is radioactive ray
The path of function planning.
Import the cylinder model of a φ 20, setting wherein one layer of radiation beam parameter according to list:
Obtain the effect picture of the fill path such as Figure 13.
Import the model of a similar wooden club shape, setting wherein one layer of radiation beam parameter according to list:
Obtain the effect picture of the fill path such as Figure 14.
Referring to Fig.1 5, wherein with bias function and radiation line function, different interlayer alternate combinations generate biasing-radioactive ray
The planning path of composite function filling.Obtain the effect picture 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 for importing φ 40, is arranged two layers of its interval, respectively according to radiation line function and biasing
Function processing, according to each parameter according to list:
Obtain the effect picture of the fill path such as Figure 15.
The model for importing a similar wooden club shape, is arranged two layers of its interval, respectively according to radiation line function and biasing letter
Number processing, according to each parameter according to list:
Obtain the effect picture of the fill path such as Figure 16.
The parameter of density function is substituted into density function and obtains the pad parameter of adjacent lines to obtain planning path.
Step S406 carries out 3D printing according to printing path.
The embodiment of the invention provides a kind of 3D printing methods of heterogeneous filler, pass 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 direction of threedimensional model,
So that complete article has different Density Distribution Features, very good solution sample in cross section (monolayer slices)
Product are to specific demands such as Mechanics of Machinery, fluid dynamics, functional characteristics, and the technical issues 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, institute in corresponding embodiment one
A kind of 3D printing method of the heterogeneous filler provided, the embodiment of the invention provides a kind of 3D printing of heterogeneous filler dresses
It sets, which includes:
Read module 10 is received, for receiving and reading the threedimensional model file of article to be processed；
It is layered judgment module 20, the threedimensional model for obtaining according to reading is layered；
Path planning module 30, for being planned according to the height of threedimensional model and/or the Density Distribution Feature of width direction
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 in direction plans printing path, and carries out 3D printing according to the printing path of planning.Aforesaid way being capable of root
Printing path planning, very good solution are carried out according to the short transverse of article to be processed and/or the Density Distribution Feature of width direction
Sample is to specific demands such as Mechanics of Machinery, fluid dynamics, functional characteristics, and the technical issues of printing flexible, porous structure.
The technical effect of device provided by the present embodiment, realization principle and generation is identical with previous embodiment, for letter
It describes, Installation practice part does not refer to place, can refer to corresponding contents in preceding method embodiment.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection 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, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention
Within the scope of.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (8)
1. a kind of 3D printing method of heterogeneous filler characterized by comprising receive and read the three-dimensional mould of article to be processed
Type file；
It is layered according to the threedimensional model that the threedimensional model file obtains is read；
The height and the number of plies that monolayer slices are determined according to the Density Distribution Feature of the threedimensional model short transverse, according to described three
The Density Distribution Feature of dimension module short transverse, longitudinal section are multiple single layers with equal densities feature or different densities feature
It is sliced the aggregate being combined into, path parameter is determined according to the height, the number of plies and Density Distribution Feature of the monolayer slices, with
To printing path；And/or density function and the density are determined according to the Density Distribution Feature of the threedimensional model width direction
The parameter of function, the density function include: constant function, polynomial function, trigonometric function, normal distyribution function, biasing letter
The parameter of the density function is substituted into the density function and obtains the pad parameter of adjacent lines to obtain by number or radiation line function
To printing path；
3D printing is carried out according to the printing path.
2. the method according to claim 1, wherein the density function of the width direction of monolayer slices can use
A kind of density function or a variety of density functions are combined.
3. the method according to claim 1, wherein when the density function be constant function when, the constant
Function is a fixed numbers.
4. the method according to claim 1, wherein when the density function be polynomial function when, it is described more
Formula letter be f (x)+arg [1]+| arg [2]+arg [3] χ+arg [4] χ2+ |, wherein arg [1], arg [2], arg [3] and
Arg [4] is input parameter.
5. the method according to claim 1, wherein when the density function be trigonometric function when, the triangle
Function be y=arg [1]+| arg [2] sin (arg [3] χ+arg [4]+arg [5]) |, wherein arg [1], arg [2], arg [3],
Arg [4], arg [5] are input parameter.
6. the method according to claim 1, wherein when the density function be normal distyribution function when, institute
The normal distyribution function stated is, wherein、It is input parameter.
7. the method according to claim 1, wherein described is inclined when the density function is bias function
Setting function is fstep(x), wherein step [1], step [2], step [3] and step [4] are input parameter, parameter value be equal to away from
It, can be according to specific requirements, sets itself from outer profile relative distance.
8. the method according to claim 1, wherein the density function be 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
To the angle value of starting radioactive ray, value range, can be according to specific requirements, sets itself in 0-360.
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| CN108724734B (en) * | 2018-05-23 | 2020-05-22 | 西安理工大学 | Dense feature-based 3D pre-printing layering algorithm |
| CN109080131B (en) * | 2018-10-18 | 2021-05-11 | 珠海赛纳三维科技有限公司 | Three-dimensional printing method and device |
| CN109809810A (en) * | 2019-03-07 | 2019-05-28 | 华南理工大学 | A kind of bioactive ceramics bracket and preparation method thereof with heterogeneous porous bionical natural bony structure |
| CN110635109B (en) * | 2019-07-29 | 2021-07-16 | 北京航空航天大学 | Lithium metal electrode prepared by 3D printing technology and preparation method thereof |
| CN110962337B (en) * | 2019-12-17 | 2021-11-26 | 上海酷鹰机器人科技有限公司 | Method for improving strength between walls in ultra-large fused deposition 3D printing |
| CN111113889B (en) * | 2019-12-22 | 2021-06-04 | 同济大学 | Fused deposition molding method using cored wire |
| CN111319266B (en) * | 2020-03-10 | 2021-06-22 | 嘉兴学院 | Functional gradient material 3D printing path planning method based on contour line |
| CN113066523B (en) * | 2021-04-16 | 2023-03-21 | 上海交通大学 | Lepidoptera micro-nano structure unified characterization method and system based on space trigonometric function |
| CN113276420B (en) * | 2021-04-29 | 2021-11-26 | 广东海洋大学 | 3D printing method and system based on machine vision |
| CN113191014A (en) * | 2021-05-19 | 2021-07-30 | 哈尔滨理工大学 | Fused deposition 3D printing molding layered slicing method |
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