CN107187056A - The complex parts 3D printing method and system being layered based on curved surface - Google Patents
The complex parts 3D printing method and system being layered based on curved surface Download PDFInfo
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- CN107187056A CN107187056A CN201710310420.3A CN201710310420A CN107187056A CN 107187056 A CN107187056 A CN 107187056A CN 201710310420 A CN201710310420 A CN 201710310420A CN 107187056 A CN107187056 A CN 107187056A
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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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- 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
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
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Abstract
A kind of complex parts 3D printing method and system being layered based on curved surface, its threedimensional model is set up according to the structure and curved surface features of complex parts, and carries out structure lightened topology optimization design and space 3D slicing delaminations, generates the control data for 3D printing；Successively 3D printing is carried out after carrying out print parameters setting according to control data, the 3D printing part of complex parts is obtained；Space 3D slicing delaminations refer to：According to the design feature of the threedimensional model of complex parts, choose curved surface layered approach and carry out curved surface layering, Selective filling strategy after handling the space 3D individual-layer datas after layering carries out printing path and trajectory planning；It is of the invention to be advantageously implemented continuous lod manufacture compared with existing CNC process technologies, effectively improve the shaping surface precision of complex parts, reduce printing support.
Description
Technical field
It is specifically a kind of based on answering that curved surface is layered the present invention relates to a kind of technology in complex parts 3D printing field
Miscellaneous part 3D printing method and system.
Background technology
For the 3D printing of complex parts, existing layered mode is 2D layerings, i.e., based on etc. thickness, become thickness, many
The mode in direction carries out hierarchy slicing.One direction printing can not solve the problems, such as support；Change layer slab mode passes through for perpendicular
Nogata reduces slice thickness to improve printing precision to when having curved surface；And tangential section is for complex parts in many ways, then
Huge early stage slicing treatment cost can be brought.Filling mode mainly includes Raster, Zigzag, Contour, Hybrid,
Continuous, medial axis transformation etc., by the filling mode in different 2D planes, take into account filling
Efficiency and printing precision.But, the lamination error of 2D plane Internal periphery errors of fitting and Z-direction remains unchanged presence.It is existing many
Free degree printing device does not use 3D truly dependent on the filling Strategy in existing 2D slicing modes and 2D planes
The method of section, to realize that printout surface is smooth, surface curve gradient is free and adjust connection weaker between layers.
The content of the invention
The present invention is directed to deficiencies of the prior art, proposes a kind of complex parts 3D printing being layered based on curved surface
Method and system, choose curved surface layering and filling Strategy with reference to the structure of complex parts, surface and function, plan print track,
And the control data progress 3D printing and post processing of printing device are converted to, so as to realize the 3D with reference to the layering of complex parts curved surface
Printing.
The present invention is achieved by the following technical solutions：
The present invention sets up its threedimensional model according to the structure, curved surface features and process requirements of complex parts, and carries out structure
Lightweight topology optimization design and space 3D slicing delaminations, generate the control data for 3D printing；Carried out according to control data
Successively 3D printing is carried out after print parameters setting, the 3D printing part of complex parts is obtained.
The structure of described complex parts includes：Spacial special-shaped pipeline configuration, integrated labyrinth, Space Free-Form Surface
Structure etc. has the structure of larger Z-direction section lamination error.The class formation is cut into slices according to existing Z-direction, the side of X/Y plane printing
Formula can cause lamination error.
Described curved surface features include：Space Free-Form Surface, surface of revolution etc. are along the larger curved surface of Z-direction curvature.
Described process requirements include：Some part requirements are more excellent thus it requires printout in the tensile and compressive property of Z-direction
Microstructure grows along some direction, i.e., Print direction is consistent with the direction of growth.
Described foundation, by shape, property and the process materials demand towards print object in itself, is made using three-dimensional
Type software is modeled realization.
Described threedimensional model is drawn by 3D sculpting software.
Described structure lightened topology optimization design includes：Structural-functional analysis, load-carrying properties about beam analysis and stress
Specificity analysis.
Described structural-functional analysis refers to：Analyzed for key structure, key function, be further ensured that structure,
Function can reach design requirement.In the case where meeting structure function, structure lightened topological optimization is carried out.
Described load-carrying properties about beam analysis refers to：The load-carrying properties constraint in printout all directions itself is analyzed, should
Effect of constraint value printing-forming motion mode, in the case where meeting load-carrying properties constraint, carries out structure lightened topological optimization.
Described stress characteristics analysis refers to：To printout, required stress characteristics are analyzed in itself, are meeting stress
In the case of demand, structure lightened topological optimization is carried out.
Described space 3D slicing delaminations refer to：According to the design feature of the threedimensional model of complex parts, curved surface point is chosen
Layer method carries out curved surface slicing delamination, and Selective filling strategy is filled after handling the space 3D individual-layer datas after layering, is entered
Row printing path and trajectory planning.Fabrication orientation is, along radially, by envelope innermost layer and outermost data, then to select
Suitable filling Strategy is successively printed, and along radially, layered manufacturing is carried out from outside to inside or from inside to outside.
Described selection curved surface layered approach includes but is not limited to：The direction increased according to fiber or integrated structure and song
Face carries out profile-followed.
The direction of described curved surface slicing delamination can from inside to outside, from outside to inside, and thickness is equal or different.
Described control data includes but is not limited to：Between driving data and each motor for controlling each motor
The time series data of linkage.
Described successively 3D printing refers to：It is layered and prints with reference to CNC machining controls forming accuracy, often prints one or more layers
Afterwards reinforcing is processed by the way of being pressed along forming face normal orientation.
The present invention relates to a kind of system for realizing the above method, including：The three-dimensional modeling of complex parts, structure lightened open up
Flutter optimization module, space 3D slicing delaminations module, control data generation module, print parameters setting module, data transfer and 3D
Print module and post-processing module, wherein：Pass through between the three-dimensional modeling of complex parts and structure lightened topological optimization module
Three-dimensional modeling data is transmitted, structure lightened topological optimization module and space 3D control data generation module slicing delamination moulds
Data transfer is carried out by STL models between block, space 3D control data generation module slicing delaminations module includes space delamination
And print track generation, control data generation module is by beating that space 3D control data generation module slicing delamination modules are obtained
Print track is converted to the control data of each motor linkage, sets print parameters by print parameters setting module, utilizes data
Transmission and 3DD print modules realize the data transfer between upper and lower machine, and by means of beating that print parameters setting module is set
Print parameter is printed, so that the shaping of whole 3D control datas generation module printout is realized, with reference to post-processing module, air exercise
Printed document carries out certain post processing and obtains final printout.
Technique effect
Compared with prior art, the present invention is entered using the layering of three dimensions 3D curved surfaces with reference to multiple degrees of freedom 3D printing equipment
Row printing Anatomy-and-ultrastructure processed, is different from existing 2D slicing delaminations mode, i.e., in z-direction slicing delamination, successively fill；It is different from existing
2.5D layering, i.e., in different directions respectively slicing delamination, successively fill, be advantageously implemented continuous lod manufacture, reality
The enhancing of existing bearing capacity, less printing support；And use structure function for complex parts and load-carrying properties to constrain with
And stress characteristics analysis carries out structure lightened topology optimization design so that overall structure further optimizes, and reduces rapidoprint,
Cost is reduced, efficiency is improved.
Brief description of the drawings
Fig. 1 is schematic diagram of the present invention；
Fig. 2 is the curved surface layered approach schematic diagram of complex parts；
In figure：(a) before for layering, after (b) is layering；
Fig. 3 is the schematic flow sheet of embodiment 1；
Fig. 4 is six-dimension force sensor model schematic in embodiment 1；
Fig. 5 is that six-dimension force sensor space 3D curved surfaces are layered schematic diagram；
Fig. 6 is the hierarchy schematic diagram after the structure lightened topology optimization design of six-dimension force sensor；
In figure：1 is lower platform, and 2,4 be flexible hinge, and 3 be flexible beam, and 5 be upper mounting plate.
Embodiment
Embodiments of the invention are elaborated below, the present embodiment is carried out lower premised on technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementations
Example.
Embodiment 1
As shown in Figures 1 to 3, the complex parts of the present embodiment are six-dimension force sensor, specifically include following steps：
Step 1, according to the structure and curved surface features of six-dimension force sensor using 3D sculpting software draw six-dimensional force sensing
The threedimensional model of device elastomer.
Described six-dimension force sensor uses the form based on Stewart parallel institutions, including six-dimension force sensor is upper
Platform 5, lower platform 1, flexible hinge 2,4 and flexible beam 3, wherein：Flexible hinge 2,4 is the key structure portion of six-dimension force sensor
Point.
Described 3D sculpting software includes but is not limited to：Solidworks, ProE or Catia.
Step 2, the threedimensional model progress lightweight topology optimization design to being obtained in step 1, as shown in Figure 6.
The foundation of described structure lightened topology optimization design is structural-functional analysis, load-carrying properties about beam analysis and should
Force characteristic is analyzed.
Described structural-functional analysis and load-carrying properties about beam analysis can using HyperMesh, HyperView,
OptiStruct or HyperStudy is carried out, and stress characteristics analysis is carried out using Ansys software combinations MATLAB.
Step 3, as shown in Figure 4 and Figure 5, to optimizing in step 2 after threedimensional model carry out space 3D slicing delaminations, generation
3D printing equipment moving control data.
Described space 3D slicing delaminations are realized by corresponding software, and it based on MATLAB or C++ is kernel that the software, which is,
C# is the independently developed hierarchy slicing software at interface, by being read out to threedimensional model file, obtains outline data, adjustment
Corresponding parameter, and curved surface layering is carried out using modes such as offset, slicing delamination data are obtained, in conjunction with complex parts in itself
Structure, curved surface features and process requirements etc., choose suitable surface filling strategy, generate the control number of surface filling
According to.
Described space 3D slicing delaminations comprise the following steps：
S1：According to the design feature of the threedimensional model of six-dimension force sensor, integrated structure and the accompanying curved surface of curved surface are chosen
Layered approach carries out curved surface slicing delamination, to realize the increasing material manufacturing of continuous lod.
The direction of described curved surface slicing delamination is from inside to outside.
S2：Selective filling strategy after handling the space 3D individual-layer datas after layering, with reference to printing technology demand and
The performance indications of six-dimension force sensor carry out printing path and trajectory planning.
Described filling Strategy includes but is not limited to：Space zig-zag type filling, continuous space fitting a curve or spatial light
Grid are filled.
S3：The 3D data for being layered and filling in space are converted to the motion control data of 3D printing equipment.
Step 4, according to motion control data carry out print parameters setting, using synchronous material be sent into increases material manufacturing technology enter
Row successively 3D printing, obtains the 3D printing part of elastomer for six-dimensional force sensor.
Described synchronous material is sent into the laser that increases material manufacturing technology refers to including but not limited to coaxial or paraxonic powder feeding material
Cladding, welding of synchronous wire feed material etc. possess the layered manufacturing method of spatial shaping ability.
Described successively 3D printing refers to：Successively print, with reference to CNC machining control forming accuracies, often print one layer or number
Reinforcing is processed after layer by the way of being pressed along forming face normal orientation, strengthens the intensity of the part of printing.
Described 3D printing equipment possesses multiple degrees of freedom, is different from existing 3 axis movable 3D printer, such as 6DOF
Stewart 3D Printer, using the Dutch 3D printer Mataerial of mechanical arm configuration, by the way of five-axle linkage
German DMGMORI DMG Lasertec 65.
Described control forming accuracy realizes that printhead possesses spatial shaping energy relative to print platform by printhead
Different printing technology control printing-formings can be combined in printhead, laser printing head, the welding gun of power, such as FDM, print procedure
Precision.
To ensure that precision can be using increasing material manufacturing with subtracting the composite manufacturing that material manufacture is combined, such as milling, grinding.
Step 5, printout is post-processed, printing terminates.
Described post processing refers to：Intensity processing to printout is heat-treated, and the surface treatment to printout, with
Further improve shaping surface quality.
Described printout carries out the filling of curved surface layering using space curve, and the lamination eliminated in existing Z-direction is missed
Difference；And the printing type is based on multiple degrees of freedom 3D printing equipment, when printing the structure of similar cantilever beam, without printing support knot
Structure, while less printed material, also improves printing effect.
The present embodiment is different from the method that traditional CNC fabricates six-dimension force sensor, using successively printing and successively edge
The mode for forming face normal direction pressure is strengthened, while the material that subtracts that can combine milling or grinding manufactures multiple to realize
Close manufacture, forming accuracy improved while high intensity, that is, improve complex parts surface accuracies, increase complex parts printing intensity,
Realize that printout surface is smooth, surface curve gradient is free and adjust connection weaker between layers.
Above-mentioned specific implementation can by those skilled in the art on the premise of without departing substantially from the principle of the invention and objective with difference
Mode local directed complete set is carried out to it, protection scope of the present invention is defined by claims and not by above-mentioned specific implementation institute
Limit, each implementation in the range of it is by the constraint of the present invention.
Claims (9)
1. a kind of complex parts 3D printing method being layered based on curved surface, it is characterised in that according to the structure and song of complex parts
Region feature sets up its threedimensional model, and carries out structure lightened topology optimization design and space 3D slicing delaminations, generates for 3D
The control data of printing；Successively 3D printing is carried out after carrying out print parameters setting according to control data, the 3D of complex parts is obtained
Printout；
Described space 3D slicing delaminations refer to：According to the design feature of the threedimensional model of complex parts, curved surface layering side is chosen
Method carries out curved surface slicing delamination, and Selective filling strategy is filled after handling the space 3D individual-layer datas after layering, is beaten
Print path and trajectory planning.
2. complex parts 3D printing method according to claim 1, it is characterized in that, described structure lightened topological optimization
The foundation of design is that structural-functional analysis, load-carrying properties about beam analysis and stress characteristics are analyzed.
3. complex parts 3D printing method according to claim 1, it is characterized in that, described selection curved surface layered approach bag
Include but be not limited to：The direction increased according to fiber or integrated structure and curved surface carry out profile-followed.
4. complex parts 3D printing method according to claim 1, it is characterized in that, the direction of described curved surface slicing delamination
Can from inside to outside, from outside to inside, and thickness is equal or different.
5. complex parts 3D printing method according to claim 1, it is characterized in that, described successively 3D printing refers to：Knot
The layering printing of CNC machining controls forming accuracy is closed, often prints and uses what is pressed along forming face normal orientation after one or more layers
Mode is processed reinforcing.
6. complex parts 3D printing method according to claim 1, it is characterized in that, the structure bag of described complex parts
Include：Spacial special-shaped pipeline configuration, integrated labyrinth and Space Free-Form Surface structure.
7. complex parts 3D printing method according to claim 1, it is characterized in that, described curved surface features include：Space
Free form surface, surface of revolution.
8. complex parts 3D printing method according to claim 1, it is characterized in that, described foundation, by towards printing
Shape, property and the process materials demand of object in itself, realization is modeled using 3D sculpting software.
9. a kind of system for realizing any of the above-described claim methods described, it is characterised in that including：The three-dimensional of complex parts is built
Mould, structure lightened topological optimization module, space 3D slicing delaminations module, control data generation module, print parameters setting mould
Block, data transfer and 3D printing module and post-processing module, wherein：The three-dimensional modeling of complex parts and structure lightened topology are excellent
Transmitted between change module by three-dimensional modeling data, structure lightened topological optimization module is generated with space 3D control datas
Data transfer, space 3D control data generation module slicing delamination moulds are carried out by STL models between module slicing delamination module
Block includes space delamination and print track is generated, and control data generation module divides the section of space 3D control datas generation module
The print track that layer module is obtained is converted to the control data of each motor linkage, is set and printed by print parameters setting module
Parameter, realizes the data transfer between upper and lower machine, and set by means of print parameters using data transfer and 3DD print modules
The print parameters of cover half block setting are printed, so that the shaping of whole 3D control datas generation module printout is realized, with reference to
Post-processing module, carries out certain post processing to printout and obtains final printout.
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| CN107901423A (en) * | 2017-12-11 | 2018-04-13 | 杭州捷诺飞生物科技股份有限公司 | The 3D printing method of heterogeneous filler |
| CN107945277A (en) * | 2017-11-26 | 2018-04-20 | 中国人民解放军陆军装甲兵学院 | The equidistant surface layered approach of point cloud model is remanufactured based on increasing material |
| CN108320327A (en) * | 2018-01-16 | 2018-07-24 | 浙江大学 | The wall thickness such as three period minimal surfaces of one kind being layered filling region generation method |
| CN109079136A (en) * | 2018-07-25 | 2018-12-25 | 沈阳精合数控科技开发有限公司 | A kind of 3D printing method |
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