CN106270515B - 3D printing, heat treatment and finishing integral processing method - Google Patents
3D printing, heat treatment and finishing integral processing method Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
- B22F10/364—Process control of energy beam parameters for post-heating, e.g. remelting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/38—Process control to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/50—Treatment of workpieces or articles during build-up, e.g. treatments applied to fused layers during build-up
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/80—Data acquisition or data processing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
3D printing, heat treatment and finishing integral processing method, including：Industrial analysis, model treatment, layering, 3D printing, heat treatment, mechanical processing and etc., wherein 3D printing technique is gradually carried out with its own lift height, heat treatment process is inserted into when having printed and non-thermal treatment layer thickness is more than layer thickness to be heated, mechanical processing technique is inserted into when being machined lift height when being heat-treated and having exceeded for mechanical processing layer thickness.By three kinds of 3D printing, heat treatment, mechanical processing techniques alternately, it realizes by the layer molding, layering heat treatment and the processing of layering surface of printing part, the final precise forming for realizing part to be processed.The application integrates the mechanical processing problem for solving complicated shape 3D printing piece surface based on the principle of stratification by technique, improves the surface quality and dimensional accuracy of 3D parts.
Description
Technical field
The invention belongs to the RP technique field of quick forming fabri-cation, especially metal material, specifically
A kind of 3D printing, heat treatment and finishing integral processing method.
Background technology
3D printing technique is otherwise known as rapid prototyping technology, has the history of more than 30 years, and 3D printing technique obtains in recent years
Breakthrough and extensive use.3D printing technique in a manner that part is separated multiple thin slices along a direction, and then
3 d part is divided into the simple accumulation manufacture that there is certain thickness body unit, realize complex parts of two dimension；Towards work
The main of industry production includes dust laser melting accumulation molding, the accumulation molding of powdering laser melting and fuse accumulation molding three classes.
3D printing technique can manufacture the metals such as metal, ceramics, plastics and nonmetallic materials, have can manufacture parts with complex structures,
Quick production one-piece part saves the advantages that part material.
The surface quality of workpieces manufactured by 3D printing technique depends primarily on lift height and piece surface and layering face
The influence of size, printed material granule size, the accumulation mode of angle etc..For the 3D printing of metal material, due to printing
Process needs the irradiation of laser high-energy beam to make printed material melting, and so as to fulfill accumulation molding, the temperature gradient of part is larger, quilt
Part is printed there are internal stress, metal parts is usually attached with destressing heat treatment and machine adds after 3D printing technique is processed
Work technique, to meet the dimensional accuracy of part and surface quality.In existing 3D printing technique, heat treatment process is full of protection gas
It is carried out in the heat-treatment furnace of body, is machined on corresponding lathe and completes, it can be seen that complete metal parts manufacturing process
It needs to complete three kinds of techniques in three equipment, cumbersome, complicated, equipment investment is big.In addition, the complexity of mechanical processing technique
Depending on the complexity of part, part more complicated processing difficulty is bigger or even can not process；Although polishing grinding is complexity zero
One option of part mechanical processing, but polishing grinding can only improve surface quality, can not change and be deformed caused by thermal stress etc.
And dimensional accuracy；Further limit promotion and application of the 3D printing technique in complex parts manufacturing field.
Invention content
For deficiencies of the prior art, it is integrated with finishing that the present invention proposes a kind of 3D printing, heat treatment
Processing method has the integrated advantage of technique.Three kinds of independent works such as 3D printing technique, heat treatment technics, mechanical manufacturing technology
Skill integrates in part manufacturing process realizes that the alternate cycles of three kinds of technique carry out together, and reduction equipment, buying, configuration use number
Amount reduces equipment investment, depreciable cost, improves capacity utilization.
The application the technical solution adopted is that：A kind of 3D printing, heat treatment and finishing integral processing method, the processing side
Method is based on the principle of stratification, is successively alternately accomplished 3D printing, heat treatment and mechanical processing technique, so realize part it is accurate into
Type.
Further, the above method is specially：
S1. industrial analysis, with reference to three-dimensional part model, the requirement of part technology, part material specificity analysis part processing work
Skill determines model layers direction, lift height, process and technological parameter；
S2. model treatment is carried out, selection slice datum plane establishes coordinate system, establishes support auxiliary body；
S3. model layers：3D printing technique divides m layers, and heat treatment process divides n-layer, and mechanical processing technique divides p layers；If i,
J, k be respectively 3D printing technique, heat treatment process, mechanical processing technique layer cyclic variable, the i-th layer thickness be hi, jth layer
Thickness is hj, and kth layer thickness is hk；
S4. data assignment, the machined height of 3D printing that Hm is represented, Hn, which is represented, is heat-treated machined height, and Hp represents machine
Tool processes machined height；
S5.3D is printed：I=i+1 prints i-th layer, Hm=Hm+hi.
Further, the above method further includes, following steps：
If S6. if n=0 and i are more than or equal to m or n=0 and i is less than m and Hm-Hp is more than or equal to hk, step 11 is performed；If
N=0 and i are less than m and Hm-Hp is less than hk, jump to step S5 and start to perform；
If S7. if n is less than m more than or equal to m or n not equal to 0 and i not equal to 0 and i and Hm-Hn is more than or equal to hj, perform
Step 8；If n=0 and i are less than m and Hm-Hk is less than hk, jump to step S5 and start to perform；
S8. it is heat-treated：It is heat-treated jth layer；
S9.Hn=Hn+hj, j=j+1.
Further, the above method further includes, following steps：
S10. it under the conditions of j is less than n+1 and Hn-Hp is less than hk, jumps to step S5 and starts to perform；Otherwise, step is performed
S11；
S11. it is machined：It is machined kth layer, Hp=Hp+hk, k=k+1.
S12. it under the conditions of k is less than p+1, performs since step S5, otherwise terminates.
Further, the model of part to be processed is imported as entity or is closed sheet body or is waited the mid-plane model of wall thickness.
Further, model treatment includes simplified model, repairing model, makees Auxiliary support body, increases model wall thickness, and zero
Each slice of part is parallel to slice datum plane, determines part stacked direction and part Cutter coordinate system direction.
Further, molding banking process is used successively to accumulate or use from bottom to top and successively be accumulated from top to bottom.
Further, model layers include fixed thickness layering and according to model surface roughness automated hierarchicals.
Further, heat treatment process is complete by adjusting laser technical parameters by tool of the lasing light emitter of 3D printing
Into.
As further, mechanical processing technique utilizes multiaxis high-rate wireless LAN to realize, each layer of mechanical processing
Multilayer milling is divided to complete according to processed place layer parts profile according to element precision requirement.
As further, the laser head used in 3D printing can be changed to the laser head that dusts, and realize based on dusting
3D printing, heat treatment and the method for finishing processing of laser melting accumulation molding.
As further, the laser head used in 3D printing can be changed to fuse nozzle, realize based on fuse heap
The molding 3D printing of product, method for finishing processing.
The present invention due to using the technology described above, can obtain following technique effect：
1st, the application has the integrated advantage of technique：Three kinds of 3D printing technique, heat treatment technics, mechanical manufacturing technology etc.
Independent process integrates in part manufacturing process realizes that the alternate cycles of three kinds of technique carry out together, reduces equipment, buying, configuration
Usage quantity reduces equipment investment depreciation, cost, improves capacity utilization.
2nd, the surface quality of part is improved：By the way that the one-time mechanical processing of terminal stage is decomposed each layer so as to reality
Existing part is gradually successively processed, solve complicated, position in complex parts finished machined interfere with each other, narrow space etc.
Problem reduces part difficulty of processing, improves surface quality of workpieces.
3rd, present method solves thermal stress etc. to cause problem on deformation：It is zero by the part wall thickening technology in model treatment
Part thermal stress deformation is prefixed distortion allowance, then after eliminating internal stress by heat treatment, ensures that part is final by mechanical processing
Geometric accuracy.
4th, this method has scalability, can form the 3D printing based on laser melting accumulation molding, heat treatment and essence
Whole integration processing technology, can form the 3D printing processing technology integrated with finishing based on laser melting accumulation molding
Method can also form 3D printing technique and finishing integration processing technology based on fuse accumulation molding.Composition is different
For the premise of method by replacing laser head as laser head or the spinneret melting head of dusting, this process can be by machine tool chief axis tool changing
Action is realized, can generate different 3D build up process methods, a variety of processes can be extended to by this method.
Description of the drawings
The present invention 1 width of shared attached drawing：
Fig. 1 is 3D printing, heat treatment and finishing integral processing method flow chart.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, it is right in the following with reference to the drawings and specific embodiments
The present invention is described in detail.
Embodiment 1
The present embodiment provides a kind of 3D by taking dust laser melting accumulation molding and powdering laser melting accumulation molding as an example
Printing, heat treatment and finishing integral processing method, including：
S1. industrial analysis：With reference to three-dimensional part model, the requirement of part technology, part material specificity analysis part processing work
Skill determines model layers direction, lift height, process and technological parameter；The step is identical with the common print principle of stratification,
The model is entity or closes sheet body or waits the mid-plane model of wall thickness；
S2. model treatment：Type according to model is imported makees model necessary processing, main to include doing non-close sheet body
Benefit face, which sutures, centering surface parts do the confining surface of structure part, biasing is done to piece surface thickens；Selection slice benchmark is put down
Coordinate system is established in face, establishes support auxiliary body；
S3. model layers：Divide m according to the material property of model, the requirement of part technology and processing efficiency, 3D printing technique
Layer, heat treatment process divide n-layer, and mechanical processing technique divides p layers；If i, j, k are respectively 3D printing technique, heat treatment process, machinery
The cyclic variable of the layer of processing technology, the i-th layer thickness are hi, and jth layer thickness is hj, and kth layer thickness is hk；
S4. data assignment, the machined height of 3D printing that Hm is represented, Hn, which is represented, is heat-treated machined height, and Hp represents machine
Tool processes machined height；Initial value i=0, j=1, k=1, Hm=0, Hn=0, Hp=0；
S5.3D is printed：I=i+1 completes i-th layer of powdering according to the i-th layer thickness, according to i-th layer of shape control laser according to
Provide that path realizes that i-th layer of part zone and support auxiliary body region realize accumulation molding, printing i-th by adjusting laser parameter
Layer, Hm=Hm+hi；
If S6. n=0 and i are more than or equal to m or n=0 and i is less than m and Hm-Hp is more than or equal to hk, step 11 is performed；If n
=0 and i is less than m and Hm-Hp is less than hk, jumps to step S5 and starts to perform；
If S7. n is more than or equal to m or n not equal to 0 and i and is more than or equal to hj less than m and Hm-Hn not equal to 0 and i, step is performed
Rapid 8；If n=0 and i are less than m and Hm-Hk is less than hk, jump to step S5 and start to perform；
S8. it is heat-treated：It is heat-treated jth layer；
S9.Hn=Hn+hj, j=j+1；
S10. it under the conditions of j is less than n+1 and Hn-Hp is less than hk, jumps to step S5 and starts to perform；Otherwise, step is performed
S11；
S11. it is machined：It is machined kth layer, Hp=Hp+hk, k=k+1；
S12. it under the conditions of k is less than p+1, performs since step S5, otherwise terminates.
Embodiment 2
The present embodiment provides a kind of 3D printing, finishing integral processing method by taking fuse accumulation molding as an example, including：
S1. industrial analysis：With reference to three-dimensional part model, the requirement of part technology, part material specificity analysis part processing work
Skill determines model layers direction, lift height, process and technological parameter；Import the model of part to be processed for entity or
Closing sheet body or the mid-plane model for waiting wall thickness；
S2. model treatment：Type according to model is imported makees model necessary processing, main to include doing non-close sheet body
Benefit face, which sutures, centering surface parts do the confining surface of structure part, biasing is done to piece surface thickens；Selection slice benchmark is put down
Coordinate system is established in face, establishes support auxiliary body；
S3. model layers：Divide m according to the material property of model, the requirement of part technology and processing efficiency, 3D printing technique
Layer, mechanical processing technique divide p layers；If i, k be respectively 3D printing technique, mechanical processing technique layer cyclic variable, the i-th thickness
It spends for hi, kth layer thickness is hk；
S4. data assignment, the machined height of 3D printing that Hm is represented, Hp, which is represented, is machined machined height；Initial value i
=0, k=1, Hm=0, Hp=0；
S5.3D is printed：I=i+1 completes i-th layer of powdering according to the i-th layer thickness, according to i-th layer of shape control laser according to
Provide that path realizes that i-th layer of part zone and support auxiliary body region realize accumulation molding, printing i-th by adjusting laser parameter
Layer, Hm=Hm+hi；
S6. it under the conditions of i is less than m and Hm-Hn is less than hj, jumps to step S5 and starts to perform；Otherwise, step S7 is performed；
S7. it under the conditions of j is less than n+1 and Hn-Hp is less than hk, jumps to step S5 and starts to perform；Otherwise, step is performed
S8；
S8. it is machined：It is machined kth layer, Hp=Hp+hk, k=k+1；
S9. it under the conditions of k is less than p+1, performs since step S5, otherwise terminates.
Embodiment 3
As the supplement to embodiment 1,2, model treatment includes simplified model, repairing model, makees Auxiliary support body, increases
Model wall thickness, each slice of part are parallel to slice datum plane, determine part stacked direction and part machining coordinate
It is direction, molding banking process uses successively to accumulate or use from bottom to top successively accumulates from top to bottom.Model layers include
Fixed thickness is layered and according to model surface roughness automated hierarchical.
As can be preferred, it using the lasing light emitter of 3D printing be tool by adjusting laser technical parameters that heat treatment process, which is,
It completes.It is heat-treated lift height and depends on part material, part wall thickness and design of part.
As can be preferred, mechanical processing technique utilizes multiaxis high-rate wireless LAN to realize, each layer of mechanical processing
Multilayer milling is divided to complete according to processed place layer parts profile according to element precision requirement.The lift height of mechanical processing depends on
Gap and selected cutter, Cutting Process parameter between design of part.
3D printing process is continuous on a machine tool, is automatically performed.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art in the technical scope of present disclosure, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (7)
1.3D printings, heat treatment and finishing integral processing method, which is characterized in that including：
S1. model layers direction, lift height, process and technological parameter are determined；
S2. model treatment, selection slice datum plane, establishes coordinate system, establishes support auxiliary body；
S3. model layers：3D printing technique divides m layers, and heat treatment process divides n-layer, and mechanical processing technique divides p layers；If i, j, k distinguish
For 3D printing technique, heat treatment process, mechanical processing technique layer cyclic variable, the i-th layer thickness is hi, and jth layer thickness is
Hj, kth layer thickness are hk；
S4. data assignment, Hm represent the machined height of 3D printing, and Hn, which is represented, is heat-treated machined height, and Hp represents mechanical processing
Machined height；
S5.3D is printed：I=i+1 prints i-th layer, Hm=Hm+hi；
If S6. n=0 and i are more than or equal to m or n=0 and i is less than m and Hm-Hp is more than or equal to hk, step S11 is performed；If n=0 and i
It is less than hk less than m and Hm-Hp, jumps to step S5 and start to perform；
If S7. n is more than or equal to m or n not equal to 0 and i and is more than or equal to hj less than m and Hm-Hn not equal to 0 and i, step S8 is performed；
If n=0 and i are less than m and Hm-Hk is less than hk, jump to step S5 and start to perform；
S8. it is heat-treated：It is heat-treated jth layer；
S9.Hn=Hn+hj, j=j+1；
S10. it under the conditions of j is less than n+1 and Hn-Hp is less than hk, jumps to step S5 and starts to perform；Otherwise, step S11 is performed；
S11. it is machined：It is machined kth layer, Hp=Hp+hk, k=k+1；
S12. it under the conditions of k is less than p+1, performs since step S5, otherwise terminates.
2. 3D printing, heat treatment and finishing integral processing method according to claim 1, which is characterized in that including：It imports
The model of part to be processed is entity or closes sheet body or waits the mid-plane model of wall thickness.
3. 3D printing, heat treatment and finishing integral processing method according to claim 1, which is characterized in that including：Model
Processing includes simplified model, repairing model, makees Auxiliary support body, increases model wall thickness, and each slice of part, which is parallel to, to be cut
Piece datum plane determines part stacked direction and part Cutter coordinate system direction.
4. 3D printing, heat treatment and finishing integral processing method according to claim 3, which is characterized in that including：Molding
Banking process uses successively to accumulate or use from bottom to top successively accumulates from top to bottom.
5. 3D printing, heat treatment and finishing integral processing method according to claim 1, which is characterized in that including：Model
Layering includes fixed thickness layering and according to model surface roughness automated hierarchical.
6. 3D printing, heat treatment and finishing integral processing method according to claim 1, which is characterized in that including：At heat
Science and engineering skill is to be completed using the lasing light emitter of 3D printing as tool by adjusting laser technical parameters.
7. 3D printing, heat treatment and finishing integral processing method according to claim 1, which is characterized in that including：Machinery
Processing technology realizes that each layer of mechanical processing is required according to element precision according to processed institute using multiaxis high-rate wireless LAN
Multilayer milling is divided to complete in layer parts profile.
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| CN108145976B (en) * | 2018-02-07 | 2019-12-13 | 西安康拓医疗技术有限公司 | processing method and processing system for high-melting-point polymer |
| CN110042214A (en) * | 2019-04-17 | 2019-07-23 | 大族激光科技产业集团股份有限公司 | 3D printing part and its post-processing approach and preparation method |
| CN110153728B (en) * | 2019-05-28 | 2020-09-01 | 南昌航空大学 | 3D printing-welding-cold and hot treatment combined machining device and method |
| US20200401102A1 (en) * | 2019-06-21 | 2020-12-24 | Qiang Cui | Frame Structure Optimization Method Based on 3D Printing |
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