CN106984812A - A kind of reinforced Laser Scanning melted for selective laser - Google Patents
A kind of reinforced Laser Scanning melted for selective laser Download PDFInfo
- Publication number
- CN106984812A CN106984812A CN201710213674.3A CN201710213674A CN106984812A CN 106984812 A CN106984812 A CN 106984812A CN 201710213674 A CN201710213674 A CN 201710213674A CN 106984812 A CN106984812 A CN 106984812A
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- Prior art keywords
- circumcircle
- scanning
- filling
- subregion
- polygonal
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Links
- 238000000034 method Methods 0.000 claims description 18
- 230000002146 bilateral effect Effects 0.000 claims description 7
- 238000005192 partition Methods 0.000 abstract description 5
- 238000009826 distribution Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000256844 Apis mellifera Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
-
- 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
-
- 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]
-
- 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
- B22F10/366—Scanning parameters, e.g. hatch distance or scanning strategy
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a kind of reinforced Laser Scanning melted for selective laser, including：(1) prepare a layer cross section profile of workpiece needed for obtaining and recognize, subregion is carried out in the evenly distributed mode of same polygonal shape in profile region；(2) based on each polygon, each polygonal circumcircle is generated, the polygonal rectilinear strip is deleted；(3) each polygonal circumcircle subregion generated to step (2) is scanned filling.The same polygonal shape is regular hexagon, square or equilateral triangle.The present invention to polygon by setting circumcircle, filling is scanned to circumcircle subregion again, due to a remelting can be carried out to partition boundaries, significantly reduce the probability of partition boundaries lap-joint stress concentration, significantly reduce the concentration of internal stress, and make internal stress distribution more uniform, it is to avoid the buckling deformation of forming part.
Description
Technical field
The present invention relates to 3D printing technique field, more particularly to a kind of reinforced laser melted for selective laser is swept
Retouch method.
Background technology
Increasing material manufacturing (Additive Manufacturing, AM) technology is that the method gradually added up using material manufactures real
The technology of body part, is the manufacture method of a kind of " from bottom to top ", closely relative to traditional material removal-Machining Technology for Cutting
Over 20 years, AM technologies achieve quick development.
Selective laser fusing (Selective Laser Melting, SLM) directly manufacturing technology is also known as metal 3D printing skill
Art, is the cutting edge technology of increasing material manufacturing.Before processing, software is handled by expert data first to carry out the CAD model of part
Section is discrete and adds necessary supporting construction formation STL models, then plans scanning pattern, the data after processing will be included
The profile information that laser beam can be controlled to move.Then this data is imported into former, computer successively calls in profile information,
Control scanning galvanometer enters horizontal deflection, realizes laser facula optionally fusing metal powder, is bonded as one with previous layer material,
And powder is still in fluffy in the region not being irradiated with a laser, it can recycle.
During melt-processed in selective laser, its crudy Stimulated Light spot size, sweep speed, sweep span,
Scanning pattern, laser send the influence of the factors such as laser energy.In process, when metal powder material stimulated radiation is molten
During change, because the time sequencing difference of cooling can cause part non-uniform shrinkage, larger residual stress, this stress can be produced
The buckling deformation of molded layer is may result in when serious, can be cracked when serious.The scan mode of also laser beam decides
Thermo parameters method in processing aspect, therefore determine the degree of buckling deformation and the size of residual stress.
During melt-processed in selective laser, the filling scan mode used at present can be largely classified into parallel lines and sweep
Retouch, profile equal space line is scanned, parallel lines and the hybrid scanning of profile equal space line, the triangular mesh of also subregion are scanned and island
Small island formula is scanned.During using hybrid scanning, the border of interface profile is scanned by profile equal space line, and parallel line sweeping is pressed in inside.It is flat
Line scan only needs one axle motion of rapidform machine, and sweep speed is fast, and scanning algorithm is simple, so program is also simpler
It is single, easily realize；Triangular mesh scan during subregion, cusp can be produced, increase computer disposal difficulty and
The difficulty of Laser Processing.Constantly expand with the application of selective laser smelting technology, to evaluation criterions such as the precision of part
And performance proposes higher requirement.Therefore, a kind of new reinforced laser for being used to melt selective laser how is founded to sweep
Method is retouched, the quality for the manufactured workpiece of raising selective laser fusing is significant.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of reinforced Laser Scanning melted for selective laser,
It is reduced the probability of partition boundaries lap-joint stress concentration, hence it is evident that the concentration of reduction internal stress, and make internal stress distribution more
Uniformly, so as to overcome the shortcomings of that existing scan method is present.
In order to solve the above technical problems, the present invention provides a kind of reinforced laser scanning side melted for selective laser
Method, methods described comprises the following steps：
(1) prepare a layer cross section profile of workpiece needed for obtaining and recognize, with same in the profile region
A kind of evenly distributed mode of polygonal shape carries out subregion；
(2) based on each polygon, each polygonal circumcircle is generated, the polygonal straight line is deleted
Lines；
(3) each polygonal circumcircle subregion generated to step (2) is scanned filling.
As a modification of the present invention, same polygonal shape is regular hexagon, square in the step (1)
Or equilateral triangle.
Further improve, the laser beam scan path of each polygonal circumcircle subregion is double for straight line in the step (3)
To scan mode.
Further improve, the distance between every adjacent filling line is 0~0.3mm in the straight line bilateral scanning mode.
Further improve, the angle adjustable of every filling line is 0~180 ° in the straight line bilateral scanning mode.
Further improve, the length of side of the regular hexagon is 1~10mm.
Further improve, be scanned the tool of filling in the step (3) to each polygonal circumcircle subregion
Body method is：Filling is first scanned to a polygonal circumcircle subregion, then using the polygonal circumcircle subregion in
The heart completes the scanning filling of each annular domain according to the form of concentric circles successively, in each annular domain scanning filling process
In, the scanning filling of each polygon circumcircle, and adjacent each ring-like area are sequentially completed in the way of clockwise or counterclockwise
Polygon circumcircle subregion between domain is sequentially filled in the opposite direction.
Further improve, methods described also includes：Complete what step (3) was carried out to all polygonal circumcircle subregions
After scanning filling, the frame scanning in the profile region is completed.
Further improve, the frame scanning in the profile region uses profile equal space line scan mode.
After such design, the present invention at least has advantages below：
The reinforced Laser Scanning that the present invention melts for selective laser, by setting circumcircle to polygon, then
Filling is scanned to circumcircle subregion, because this method can carry out a remelting to the border of subregion, significantly reduced
The probability of partition boundaries lap-joint stress concentration, can significantly reduce the concentration of internal stress, and make internal stress distribution more equal
It is even, it is to avoid the buckling deformation of forming part.
The present invention effectively can also control part processed for the reinforced Laser Scanning that selective laser is melted
Stress produces direction in journey, then allows the stress produced in different circumcircle regions to cancel each other out, and reaches the purpose of elimination stress.
And it also assures that part has high precision and intensity.
Brief description of the drawings
Above-mentioned is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention, below
With reference to accompanying drawing, the present invention is described in further detail with embodiment.
Fig. 1 is that honeycomb arrangement subregion shows in step (1) profile region in reinforced Laser Scanning of the invention
It is intended to；
Fig. 2 is the schematic diagram of step (2) each regular hexagon generation circumcircle in reinforced Laser Scanning of the invention；
Fig. 3 is the schematic diagram of each regular hexagon circumcircle subregion of step (2) in reinforced Laser Scanning of the invention；
Fig. 4 is that the scanning pattern of step (3) each regular hexagon circumcircle in reinforced Laser Scanning of the invention shows
It is intended to.
Embodiment
Referring to the drawings shown in 1 to 4, the present embodiment is used for the reinforced Laser Scanning that selective laser is melted, including such as
Lower step：
(1) handle software with computer expert data first and the required workpiece for preparing be cut into some layer cross section profiles,
The profile of each layer of acquisition；And recognized by computer professional software, according to honeybee in the profile region of the identification
Nest shape arrangement mode carries out subregion, as shown in Figure 1.
Preferred embodiment is that each hexagon is regular hexagon in the honeycomb arrangement subregion, and the side of the regular hexagon
A length of 1~10mm.
(2) based on each hexagon, the circumcircle of each hexagon is generated, and delete each polygonal straight line line
Bar, obtains the intersecting circumcircle in multiple borders, as shown in Figures 2 and 3；
(3) filling is scanned to each polygonal circumcircle subregion that step (2) is generated.
Preferred embodiment is that the laser beam scan path in above-mentioned each hexagon circumcircle region is straight line bilateral scanning side
The distance between every adjacent filling line is 0~0.3mm in formula, the straight line bilateral scanning mode, and every filling line is adjustable
Angle is 0~180 °.
More excellent embodiment is first to be scanned filling to a hexagon circumcircle in the hexagon circumcircle region,
Again centered on the hexagon circumcircle successively according to concentric circles in the form of complete the scanning filling of each annular domain, in each ring
In type sector scanning filling process, the scanning that each hexagon circumcircle is sequentially completed in the way of clockwise or counterclockwise is filled out
Fill, and the hexagon circumcircle between adjacent each annular domain is sequentially filled in the opposite direction.So the stress of the annular region divides
Cloth is annular in shape, and more uniform, it is to avoid the buckling deformation of forming part.
(4) all polygonal circumcircle subregions in step (3) are scanned after filling, complete the profile region
Frame scanning, that is, complete the scanning filling of this layer of profile.The frame scanning in the profile region is equidistant using profile
Line scan mode.
Certainly, honeycomb arrangement mode can also be the same polygonal shapes such as triangle, quadrangle in above-described embodiment
Then evenly distributed partitioned mode, more excellent use equilateral polygon carries out the setting of circumcircle based on each polygon,
Form the intersecting circumcircle subregion in border.
The reinforced Laser Scanning that the present invention melts for selective laser, by setting circumcircle to polygon, then
Filling is scanned to circumcircle subregion, because this method can carry out a remelting, pole to the border of each circumcircle subregion
The earth reduces the probability of partition boundaries lap-joint stress concentration, can significantly reduce the concentration of internal stress, and make internal stress
Distribution is more uniform, it is to avoid the buckling deformation of forming part.
The present invention can also effectively control part process for the reinforced Laser Scanning that selective laser is melted
Middle stress produces direction, and then allows the interior stress produced of different zones to cancel each other out, and reaches the purpose for eliminating stress.Meanwhile, protect
Having demonstrate,proved part has high precision and intensity.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention, this
Art personnel make a little simple modification, equivalent variations or modification using the technology contents of the disclosure above, all fall within this hair
In bright protection domain.
Claims (9)
1. a kind of reinforced Laser Scanning melted for selective laser, it is characterised in that methods described includes following step
Suddenly：
(1) prepare a layer cross section profile of workpiece needed for obtaining and recognize, with same in the profile region
The evenly distributed mode of polygonal shape carries out subregion；
(2) based on each polygon, each polygonal circumcircle is generated, the polygonal straight line line is deleted
Bar；
(3) each polygonal circumcircle subregion generated to step (2) is scanned filling.
2. reinforced Laser Scanning according to claim 1, it is characterised in that same many in the step (1)
Side shape is shaped as regular hexagon, square or equilateral triangle.
3. reinforced Laser Scanning according to claim 2, it is characterised in that each polygon in the step (3)
The laser beam scan path of the circumcircle subregion of shape is straight line bilateral scanning mode.
4. reinforced Laser Scanning according to claim 3, it is characterised in that in the straight line bilateral scanning mode
The distance between every adjacent filling line is 0~0.3mm.
5. reinforced Laser Scanning according to claim 4, it is characterised in that in the straight line bilateral scanning mode
The angle adjustable of every filling line is 0~180 °.
6. reinforced Laser Scanning according to claim 2, it is characterised in that the length of side of the regular hexagon is 1
~10mm.
7. reinforced Laser Scanning according to claim 1, it is characterised in that to described every in the step (3)
The specific method that individual polygonal circumcircle subregion is scanned filling is：First a polygonal circumcircle subregion is swept
Retouch filling, then centered on the polygonal circumcircle subregion successively according to concentric circles in the form of complete the scanning of each annular domain
Filling, during each annular domain scanning filling, is sequentially completed each polygon in the way of clockwise or counterclockwise
Polygon circumcircle subregion between the scanning filling of shape circumcircle, and adjacent each annular domain is sequentially filled in the opposite direction.
8. the reinforced Laser Scanning according to any one of claim 1 to 7, it is characterised in that methods described is also wrapped
Include：After the scanning filling that step (3) is carried out to all polygonal circumcircle subregions is completed, the profile region is completed
Frame scanning.
9. reinforced Laser Scanning according to claim 8, it is characterised in that the frame in the profile region
Scanning uses profile equal space line scan mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710213674.3A CN106984812B (en) | 2017-04-01 | 2017-04-01 | A kind of reinforced Laser Scanning for selective laser fusing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710213674.3A CN106984812B (en) | 2017-04-01 | 2017-04-01 | A kind of reinforced Laser Scanning for selective laser fusing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106984812A true CN106984812A (en) | 2017-07-28 |
| CN106984812B CN106984812B (en) | 2019-01-04 |
Family
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107876766A (en) * | 2017-11-23 | 2018-04-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Laser sintered scan method |
| CN107953552A (en) * | 2017-11-24 | 2018-04-24 | 湖南华曙高科技有限责任公司 | Laser Scanning, readable storage medium storing program for executing and laser scanning control device |
| CN109047759A (en) * | 2018-08-15 | 2018-12-21 | 南京理工大学 | A kind of Laser Scanning for improving interlaminar strength and reducing buckling deformation |
| CN109622965A (en) * | 2019-01-10 | 2019-04-16 | 西安智熔金属打印系统有限公司 | Electron beam selective melting shapes pre-heating scan method |
| CN110193603A (en) * | 2019-06-25 | 2019-09-03 | 鑫精合激光科技发展（北京）有限公司 | A kind of selective laser fusing partition method based on length of scanning line optimization |
| CN110625114A (en) * | 2019-09-26 | 2019-12-31 | 鑫精合激光科技发展（北京）有限公司 | Laser scanning method for coaxial powder feeding |
| CN110773738A (en) * | 2019-11-26 | 2020-02-11 | 南京理工大学 | Laser scanning path regional planning method based on polygon geometric feature recognition |
| CN112276113A (en) * | 2020-12-30 | 2021-01-29 | 西安赛隆金属材料有限责任公司 | Preheating scanning method and device for manufacturing three-dimensional object |
| CN112475316A (en) * | 2020-11-05 | 2021-03-12 | 上海云铸三维科技有限公司 | Composite reinforced laser melting scanning method |
| CN114799213A (en) * | 2022-03-30 | 2022-07-29 | 湖南华曙高科技股份有限公司 | Laser scanning method, device and storage medium for powder bed melting process |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107876766A (en) * | 2017-11-23 | 2018-04-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Laser sintered scan method |
| CN107953552A (en) * | 2017-11-24 | 2018-04-24 | 湖南华曙高科技有限责任公司 | Laser Scanning, readable storage medium storing program for executing and laser scanning control device |
| CN109047759A (en) * | 2018-08-15 | 2018-12-21 | 南京理工大学 | A kind of Laser Scanning for improving interlaminar strength and reducing buckling deformation |
| CN109622965A (en) * | 2019-01-10 | 2019-04-16 | 西安智熔金属打印系统有限公司 | Electron beam selective melting shapes pre-heating scan method |
| CN110193603B (en) * | 2019-06-25 | 2021-04-23 | 鑫精合激光科技发展（北京）有限公司 | Laser selective melting zoning method based on scanning line length optimization |
| CN110193603A (en) * | 2019-06-25 | 2019-09-03 | 鑫精合激光科技发展（北京）有限公司 | A kind of selective laser fusing partition method based on length of scanning line optimization |
| CN110625114A (en) * | 2019-09-26 | 2019-12-31 | 鑫精合激光科技发展（北京）有限公司 | Laser scanning method for coaxial powder feeding |
| CN110625114B (en) * | 2019-09-26 | 2021-11-05 | 鑫精合激光科技发展（北京）有限公司 | Laser scanning method for coaxial powder feeding |
| CN110773738A (en) * | 2019-11-26 | 2020-02-11 | 南京理工大学 | Laser scanning path regional planning method based on polygon geometric feature recognition |
| CN110773738B (en) * | 2019-11-26 | 2020-11-03 | 南京理工大学 | Laser scanning path regional planning method based on polygon geometric feature recognition |
| CN112475316A (en) * | 2020-11-05 | 2021-03-12 | 上海云铸三维科技有限公司 | Composite reinforced laser melting scanning method |
| CN112276113B (en) * | 2020-12-30 | 2021-04-13 | 西安赛隆金属材料有限责任公司 | Preheating scanning method and device for manufacturing three-dimensional object |
| CN112276113A (en) * | 2020-12-30 | 2021-01-29 | 西安赛隆金属材料有限责任公司 | Preheating scanning method and device for manufacturing three-dimensional object |
| CN114799213A (en) * | 2022-03-30 | 2022-07-29 | 湖南华曙高科技股份有限公司 | Laser scanning method, device and storage medium for powder bed melting process |
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| Publication number | Publication date |
|---|---|
| CN106984812B (en) | 2019-01-04 |
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