CN106493367A - A kind of Laser Scanning for selective laser fusing - Google Patents
A kind of Laser Scanning for selective laser fusing Download PDFInfo
- Publication number
- CN106493367A CN106493367A CN201611121093.9A CN201611121093A CN106493367A CN 106493367 A CN106493367 A CN 106493367A CN 201611121093 A CN201611121093 A CN 201611121093A CN 106493367 A CN106493367 A CN 106493367A
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- CN
- China
- Prior art keywords
- scanning
- filling
- hexagon
- laser
- profile
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Classifications
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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
-
- 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
Abstract
The invention discloses a kind of Laser Scanning for selective laser fusing, including：(1) obtain the profile of workpiece and recognize, according to honeycomb arrangement mode subregion in profile region；(2) first to a hexagon scanning filling in honeycomb arrangement subregion, again centered on the hexagon successively according to concentric circular in the form of complete the scanning filling of each annular domain, during the scanning filling of each annular domain, order is sequentially filled according to the hexagon in the scanning filling that mode clockwise or counterclockwise is sequentially completed each hexagon, and adjacent each annular domain contrary；(3) scanning filling of all honeycomb arrangement subregions is completed, the frame scanning in profile region is finally completed.The present invention is by honeycomb arrangement mode subregion, and is sequentially filled by circular pattern, and the hexagon filling direction of adjacent annular domain is conversely, make the stress distribution of the annular region annular in shape, and the belt stress cancels each other out, 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 laser scanning side for selective laser fusing
Method.
Background technology
Increasing material manufacturing (Additive Manufacturing, AM) technology is that the method manufacture gradually added up using material is real
The technology of body part, relative to traditional material removal-Machining Technology for Cutting, is the manufacture method of a kind of " from bottom to top ", its
Also known as " rapid prototype manufacturing (Rapid Prototyping) ", " 3 D-printing (3D Printing) " or " entity is freely made
Make (Solid Free-form Fabrication) ".
Directly manufacturing technology is also known as metal 3D printing skill for selective laser fusing (Selective Laser Melting, SLM)
Art, is the cutting edge technology of increasing material manufacturing.Before processing, processing software by expert data first is carried out the CAD model of part
Section is discrete and adds necessary supporting construction formation STL models, then plans that scanning pattern, the data after process will include
The profile information of laser beam movement can be controlled.Then this data is imported 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 can be recycled still in fluffy in the region not being irradiated with a laser.
During selective laser is melt-processed, its crudy Stimulated Light spot size, scanning speed, sweep span,
Scanning pattern, laser instrument send the impact of the factors such as laser energy.In process, when metal powder material stimulated radiation is molten
During change, the time sequencing difference due to cooling down can cause part non-uniform shrinkage, can produce larger residual stress, this stress
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 determines the size of the degree and residual stress of buckling deformation.
During selective laser is melt-processed, the filling scan mode of employing can be largely classified into parallel lines and sweep at present
Retouch, profile equal space line is scanned, parallel lines and the hybrid scanning of profile equal space line, the triangular mesh for also having subregion are scanned and island
Small island formula is scanned.Using during hybrid scanning, the scanning of profile equal space line is pressed on the border of interface profile, and parallel line sweeping is pressed in inside.Flat
Line scan only needs one axle motion of rapidform machine, and scanning speed is fast, and scanning algorithm is simple, so program is also simpler
Single, easily realize；Triangular mesh scan during subregion, cusp can be produced, increase computer disposal difficulty and
The difficulty of Laser Processing.As the range of application of selective laser smelting technology constantly expands, to evaluation criterions such as the precision of part
And performance is put forward higher requirement.Therefore, how a kind of new Laser Scanning for selective laser fusing is founded,
For improve selective laser fusing manufactured by workpiece quality significant.
Content of the invention
The technical problem to be solved in the present invention is to provide a kind of Laser Scanning for selective laser fusing so as to can
Effectively in the control part course of processing, stress produces direction, and then allows the interior stress for producing of zones of different to cancel each other out, and reaches
The purpose of stress is eliminated, so as to overcome the shortcomings of that existing scan method is present.
For solving above-mentioned technical problem, the present invention provides a kind of Laser Scanning for selective laser fusing, described
Method comprises the steps：
(1) prepare a layer cross section profile of workpiece and recognize needed for obtaining, in the profile region according to
Honeycomb arrangement mode carries out subregion；
(2) filling is scanned to a hexagon in the honeycomb arrangement subregion first, then with the hexagon is
Center completes the scanning filling of each annular domain according to the form of concentric circular successively, in the scanning filling mistake of each annular domain
Cheng Zhong, according to six in the filling that mode clockwise or counterclockwise is sequentially completed each hexagon, and adjacent each annular domain
Side shape is sequentially filled in opposite direction；
(3) scanning filling of all honeycomb arrangement subregions in the profile region is completed with step (2), finally
Complete the frame scanning in the profile region.
Used as a modification of the present invention, in step (2), the laser beam scan path of each hexagonal area is straight line
Bilateral scanning mode.
Further improve, in the laser scanning of each hexagonal area, per bar, the distance between adjacent filling line is 0
～0.3mm.
Further improve, in the honeycomb arrangement subregion, each hexagon is regular hexagon.
Further improve, the orthohexagonal length of side is 1～10mm.
Further improve, the frame scanning in the profile region adopts profile equal space line scan mode.
After using such design, the present invention at least has advantages below：
Cellular scan method of the present invention for selective laser fusing, by adopting honeycomb arrangement side by profile
Formula subregion, and direction is just being sequentially filled by hexagon of the circular pattern successively between scanning filling, and adjacent each annular domain
Well conversely, making the stress distribution of the annular region annular in shape, and the belt stress cancels each other out, and reaches the purpose for eliminating stress,
Avoid the buckling deformation of forming part.
For the cellular scan method of selective laser fusing, the present invention also assures that part has high precision and intensity.
Description of the drawings
Above-mentioned be only technical solution of the present invention general introduction, in order to better understand the present invention technological means, below
In conjunction with accompanying drawing, the present invention is described in further detail with specific embodiment.
Fig. 1 is honeycomb arrangement subregion schematic diagram in profile region in the present invention；
Fig. 2 is the scanning pattern schematic diagram of cellular subregion in the present invention.
Specific embodiment
The present invention comprises the steps for the Laser Scanning of selective laser fusing：
(1) software being processed with computer expert data first, the required workpiece for preparing is cut into some layer cross section profiles,
Obtain each layer of profile；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, and the orthohexagonal side in the honeycomb arrangement subregion
A length of 1～10mm.
(2) filling is scanned to a hexagon in the honeycomb arrangement subregion first, then centered on the hexagon
Form according to concentric circular completes the scanning filling of each annular domain successively, during each annular domain scanning filling, presses
According to six sides between the scanning filling that mode clockwise or counterclockwise is sequentially completed each hexagon, and adjacent each annular domain
Shape is sequentially filled in opposite direction.
Referring to the drawings shown in 2, it is filled on the basis of middle hexagon, the laser beam scan path in the hexagon is adopted
Straight line bilateral scanning mode, i.e. S types.Wherein, the distance between each adjacent filling line is adjusted from 0～0.3mm.Such as from center
The a sides of hexagon are starting point, and b sides terminal carries out S type scannings, after completing the scanning filling of the central hexagonal, carry out around which
The filling of 6 hexagons, such as with c sides as starting point, d sides are terminal, continue with e sides as starting point after carrying out S type scannings, and f sides are for eventually
Point, completes the scanning filling of 6 hexagons in first annular region, successively then successively according to inverse according to clockwise direction
Clockwise completes the scanning filling of 12 hexagons in second annular region, and so stress distribution of the annular region is in ring
Shape, and more uniform, it is to avoid the buckling deformation of forming part.
(3) all subregion fillings in the profile region are completed with above-mentioned steps, finally complete the profile area
The frame scanning in domain, the frame scanning in the profile region complete this layer of profile text using profile equal space line scan mode
The scanning filling of part.
The present invention can effectively control stress in the part course of processing for the cellular scan method of selective laser fusing
Direction is produced, and then allows the interior stress for producing of zones of different to cancel each other out, reach the purpose for eliminating stress.Simultaneously, it is ensured that zero
Part has high precision and intensity.
The above, is only presently preferred embodiments of the present invention, not makees any pro forma restriction 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
In bright protection domain.
Claims (6)
1. a kind of for selective laser fusing Laser Scanning, it is characterised in that methods described comprises the steps：
(1) a layer cross section profile of workpiece is prepared needed for obtaining and recognized, according to honeycomb in the profile region
Shape arrangement mode carries out subregion；
(2) filling is scanned to a hexagon in the honeycomb arrangement subregion first, then centered on the hexagon
Form according to concentric circular completes the scanning filling of each annular domain successively, in the scanning filling process of each annular domain
In, according to six sides in the filling that mode clockwise or counterclockwise is sequentially completed each hexagon, and adjacent each annular domain
It is contrary that shape is sequentially filled order；
(3) scanning filling of all honeycomb arrangement subregions in the profile region is completed with step (2), is finally completed
The frame scanning in the profile region.
2. Laser Scanning according to claim 1, it is characterised in that each hexagonal area in step (2)
Laser beam scan path be straight line bilateral scanning mode.
3. Laser Scanning according to claim 2, it is characterised in that the laser scanning of each hexagonal area
In per bar the distance between adjacent filling line be 0～0.3mm.
4. Laser Scanning according to claim 1, it is characterised in that each six side in the honeycomb arrangement subregion
Shape is regular hexagon.
5. Laser Scanning according to claim 4, it is characterised in that the orthohexagonal length of side is 1～10mm.
6. Laser Scanning according to claim 1, it is characterised in that the frame scanning in the profile region is adopted
With profile equal space line scan mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611121093.9A CN106493367A (en) | 2016-12-08 | 2016-12-08 | A kind of Laser Scanning for selective laser fusing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611121093.9A CN106493367A (en) | 2016-12-08 | 2016-12-08 | A kind of Laser Scanning for selective laser fusing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106493367A true CN106493367A (en) | 2017-03-15 |
Family
ID=58330718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611121093.9A Pending CN106493367A (en) | 2016-12-08 | 2016-12-08 | A kind of Laser Scanning for selective laser fusing |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825575A (en) * | 2017-04-12 | 2017-06-13 | 广东工业大学 | A kind of honeycomb alloy material and its application |
| CN106984812A (en) * | 2017-04-01 | 2017-07-28 | 鑫精合激光科技发展（北京）有限公司 | A kind of reinforced Laser Scanning melted for selective laser |
| 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 |
| CN109359381A (en) * | 2018-10-16 | 2019-02-19 | 北京星航机电装备有限公司 | A kind of voxel-based laser path planing method |
| CN114042933A (en) * | 2021-10-29 | 2022-02-15 | 浙江意动科技股份有限公司 | SLM-based rotating part symmetric scanning method |
| CN114166145A (en) * | 2021-11-30 | 2022-03-11 | 西安交通大学 | Deformation control method and system based on heat affected zone heating sequence re-planning |
| CN114247898A (en) * | 2021-12-29 | 2022-03-29 | 中国科学院重庆绿色智能技术研究院 | Selective laser melting forming method for reducing residual stress of thin-wall part in situ |
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| CN103722171A (en) * | 2013-12-25 | 2014-04-16 | 合肥工业大学 | Honeycombed laser scanning method for selective laser sintering |
| CN104550950A (en) * | 2014-11-24 | 2015-04-29 | 湖南华曙高科技有限责任公司 | Laser scanning method for laser melting in selected area |
| US20150135897A1 (en) * | 2012-05-28 | 2015-05-21 | Renishaw Plc | Manufacture of metal articles |
| CN104890246A (en) * | 2015-04-30 | 2015-09-09 | 北京金达雷科技有限公司 | Printing method adopting photo-curing 3D printer and 3D printing system |
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| CN106077638A (en) * | 2016-05-31 | 2016-11-09 | 合肥工业大学 | A kind of for increasing the honeycomb fashion subarea-scanning method that material manufactures |
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2016
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| US20150135897A1 (en) * | 2012-05-28 | 2015-05-21 | Renishaw Plc | Manufacture of metal articles |
| CN103722171A (en) * | 2013-12-25 | 2014-04-16 | 合肥工业大学 | Honeycombed laser scanning method for selective laser sintering |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106984812A (en) * | 2017-04-01 | 2017-07-28 | 鑫精合激光科技发展（北京）有限公司 | A kind of reinforced Laser Scanning melted for selective laser |
| CN106984812B (en) * | 2017-04-01 | 2019-01-04 | 鑫精合激光科技发展（北京）有限公司 | A kind of reinforced Laser Scanning for selective laser fusing |
| CN106825575A (en) * | 2017-04-12 | 2017-06-13 | 广东工业大学 | A kind of honeycomb alloy material and its application |
| 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 |
| CN109359381A (en) * | 2018-10-16 | 2019-02-19 | 北京星航机电装备有限公司 | A kind of voxel-based laser path planing method |
| CN109359381B (en) * | 2018-10-16 | 2022-05-17 | 北京星航机电装备有限公司 | Laser path planning method based on voxels |
| CN114042933A (en) * | 2021-10-29 | 2022-02-15 | 浙江意动科技股份有限公司 | SLM-based rotating part symmetric scanning method |
| CN114166145A (en) * | 2021-11-30 | 2022-03-11 | 西安交通大学 | Deformation control method and system based on heat affected zone heating sequence re-planning |
| CN114166145B (en) * | 2021-11-30 | 2022-10-25 | 西安交通大学 | Deformation control method and system based on heat affected zone heating sequence re-planning |
| CN114247898A (en) * | 2021-12-29 | 2022-03-29 | 中国科学院重庆绿色智能技术研究院 | Selective laser melting forming method for reducing residual stress of thin-wall part in situ |
| CN114247898B (en) * | 2021-12-29 | 2022-08-12 | 中国科学院重庆绿色智能技术研究院 | Selective laser melting forming method for reducing residual stress of thin-wall part in situ |
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Application publication date: 20170315 |
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