CN106984812B - A kind of reinforced Laser Scanning for selective laser fusing - Google Patents
A kind of reinforced Laser Scanning for selective laser fusing Download PDFInfo
- Publication number
- CN106984812B CN106984812B CN201710213674.3A CN201710213674A CN106984812B CN 106984812 B CN106984812 B CN 106984812B CN 201710213674 A CN201710213674 A CN 201710213674A CN 106984812 B CN106984812 B CN 106984812B
- Authority
- CN
- China
- Prior art keywords
- circumcircle
- polygon
- scanning
- filling
- subregion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
本发明公开了一种用于激光选区熔化的加强型激光扫描方法，包括：(1)获取所需制备工件的一层截面轮廓文件并识别，在轮廓文件区域以同一种多边形形状均匀排列方式进行分区；(2)以每个多边形为基础，生成所述每个多边形的外切圆，删除所述多边形的直线线条；(3)对步骤(2)生成的所述每个多边形的外切圆分区进行扫描填充。所述同一种多边形形状为正六边形、正四边形或等边三角形。本发明通过对多边形设置外切圆，再对外切圆分区进行扫描填充，由于能对分区边界进行一次重熔，极大地降低了分区边界搭接处应力集中的概率，明显降低了内应力的集中，并使内应力分布更加均匀，避免成型零件的翘曲变形。
This invention discloses an enhanced laser scanning method for laser selective melting, comprising: (1) acquiring and identifying a cross-sectional contour file of the workpiece to be prepared, and partitioning the contour file area in a uniform arrangement of the same polygon shape; (2) generating the circumcircle of each polygon based on each polygon, and deleting the straight lines of the polygon; (3) scanning and filling the partition of the circumcircle of each polygon generated in step (2). The same polygon shape is a regular hexagon, a regular quadrilateral, or an equilateral triangle. This invention, by setting the circumcircle of the polygon and then scanning and filling the partition of the circumcircle, can greatly reduce the probability of stress concentration at the boundary of the partition due to the ability to remelt the partition boundary once, significantly reduce the concentration of internal stress, and make the internal stress distribution more uniform, thus avoiding warping deformation of the formed part.
Description
Technical field
The present invention relates to 3D printing technique fields, sweep more particularly to a kind of reinforced laser for selective laser fusing
Retouch method.
Background technique
Increasing material manufacturing (Additive Manufacturing, AM) technology is that the method gradually to be added up using material is manufactured in fact
The technology of body part is the manufacturing method of a kind of " from bottom to top ", closely relative to traditional material removal-Machining Technology for Cutting
Over 20 years, AM technology achieves 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, the CAD model of part is carried out by expert data processing software first
It is sliced the discrete and necessary support construction of addition and forms STL model, then plan scan path, data that treated will include
The mobile profile information of laser beam can be controlled.Then this data being imported into molding equipment, computer successively calls in profile information,
Control scanning galvanometer is deflected, and is realized that laser facula selectively melts metal powder, is bonded as one with previous layer material,
And in the region not being irradiated with a laser powder be still in it is fluffy, can be recycled.
During selective laser is melt-processed, processing quality stimulated light spot size, scanning speed, sweep span,
Scan path, laser issue the influence of the factors such as laser energy.In process, when metal powder material stimulated radiation is molten
When change, since cooling time sequencing difference will cause part non-uniform shrinkage, biggish residual stress, this stress can be generated
The buckling deformation that will lead to molded layer when serious, can crack when serious.There are also the scanning modes of laser beam to decide
Thermo parameters method in processing level, therefore determine the degree of buckling deformation and the size of residual stress.
During selective laser is melt-processed, currently used filling scanning mode can be mainly divided into parallel lines and sweep
Retouch, profile equal space line scanning, parallel lines and profile equal space line it is hybrid scanning, there are also subregion triangular mesh scanning and island
The scanning of small island formula.When using hybrid scanning, the boundary 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 axis movement of rapidform machine, and scanning speed is fast, and scanning algorithm is simple, so program is also simpler
It is single, it is easy to accomplish；Triangular mesh scan during subregion, cusp can be generated, increase computer disposal difficulty and
The difficulty of laser processing.As the application range of selective laser smelting technology constantly expands, to evaluation criterions such as the precision of part
And more stringent requirements are proposed for performance.Therefore, the new reinforced laser for selective laser fusing of one kind how is founded to sweep
Method is retouched, the quality that manufactured workpiece is melted for improving selective laser is of great significance.
Summary of the invention
The technical problem to be solved in the present invention is to provide it is a kind of for selective laser fusing reinforced Laser Scanning,
Reduce it by the probability that partition boundaries lap-joint stress is concentrated, hence it is evident that reduce the concentration of internal stress, and make internal stress distribution more
Uniformly, to overcome deficiency existing for existing scan method.
In order to solve the above technical problems, the present invention provides a kind of reinforced laser scanning side for selective laser fusing
Method, described method includes following steps:
(1) a layer cross section profile file of workpiece is prepared needed for obtaining and is identified, with same in the profile region
A kind of evenly distributed mode of polygonal shape carries out subregion；
(2) based on each polygon, the circumcircle of each polygon is generated, the straight line of the polygon is deleted
Lines；
(3) the circumcircle subregion of each polygon generated to step (2) is scanned filling.
As an improvement of the present invention, same polygonal shape is regular hexagon, regular quadrangle in the step (1)
Or equilateral triangle.
It is further improved, the laser beam scan path of the circumcircle subregion of each polygon is that straight line is double in the step (3)
To scanning mode.
It is further improved, the distance between every adjacent filling line is 0~0.3mm in the straight line bilateral scanning mode.
It is further improved, the angle adjustable of every filling line is 0~180 ° in the straight line bilateral scanning mode.
It is further improved, the side length of the regular hexagon is 1~10mm.
It is further improved, is scanned the tool of filling in the step (3) to the circumcircle subregion of each polygon
Body method are as follows: filling first is scanned to the circumcircle subregion of a polygon, then with the circumcircle subregion of the polygon is
The heart successively completes the scanning filling of each annular domain according to the form of concentric circles, 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 contrary.
It is further improved, the method also includes: complete the circumcircle subregion progress of step (3) to all polygons
After scanning filling, the frame scanning in the profile region is completed.
It is further improved, the frame scanning in the profile region uses profile equal space line scanning mode.
By adopting such a design, the present invention has at least the following advantages:
The present invention be used for selective laser fusing reinforced Laser Scanning, by polygon be arranged circumcircle, then
Filling is scanned to circumcircle subregion, since this method can carry out a remelting to the boundary of subregion, is significantly reduced
The probability that partition boundaries lap-joint stress is concentrated, can significantly reduce the concentration of internal stress, and keep internal stress distribution more equal
It is even, avoid the buckling deformation of forming part.
It is processed that the reinforced Laser Scanning that the present invention is used for selective laser fusing can also effectively control part
Stress generates direction in journey, and the stress generated in different circumcircle regions is then allowed to cancel each other out, and achievees the purpose that elimination stress.
And also assure that part has high precision and intensity.
Detailed description of the invention
The above is merely an overview of the technical solutions of the present invention, in order to better understand the technical means of the present invention, below
In conjunction with attached drawing, the present invention is described in further detail with specific embodiment.
Fig. 1 is that honeycomb arrangement subregion shows in step (1) profile region in the reinforced Laser Scanning of the present invention
It is intended to；
Fig. 2 is the schematic diagram that each regular hexagon of step (2) generates circumcircle in the reinforced Laser Scanning of the present invention；
Fig. 3 is the schematic diagram of each regular hexagon circumcircle subregion of step (2) in the reinforced Laser Scanning of the present invention；
Fig. 4 is that the scan path of each regular hexagon circumcircle of step (3) in the reinforced Laser Scanning of the present invention shows
It is intended to.
Specific embodiment
Referring to shown in attached drawing 1 to 4, the present embodiment is used for the reinforced Laser Scanning of selective laser fusing, including such as
Lower step:
(1) the required workpiece for preparing is cut into several layer cross section profile files with computer expert data processing software first,
Obtain each layer of profile；And identified by computer professional software, according to bee in the profile region of the identification
Nest shape arrangement mode carries out subregion, as shown in Fig. 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 deletes the straight line line of each polygon
Item obtains the circumcircle of multiple boundary intersections, as shown in Fig. 2 and 3；
(3) the circumcircle subregion of each polygon generated to step (2) is scanned filling.
Preferred embodiment is that the laser beam scan path in above-mentioned each hexagon circumcircle region is straight line bilateral scanning side
Formula, the distance between every adjacent filling line is 0~0.3mm in 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 be sequentially filled it is contrary.The stress of the annular region point in this way
Cloth is annular in shape, and more uniform, avoids the buckling deformation of forming part.
(4) after being scanned filling to the circumcircle subregion of all polygons in step (3), the profile region is completed
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 scanning mode.
Certainly, honeycomb arrangement mode may be the same polygonal shape such as triangle, quadrangle in above-described embodiment
Evenly distributed partitioned mode, it is more excellent to use equilateral polygon, the setting of circumcircle is then carried out based on each polygon,
Form the circumcircle subregion of boundary intersection.
The present invention be used for selective laser fusing reinforced Laser Scanning, by polygon be arranged circumcircle, then
Filling is scanned to circumcircle subregion, because this method can carry out a remelting, pole to the boundary 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
It is distributed more uniform, avoids the buckling deformation of forming part.
Reinforced Laser Scanning of the present invention for selective laser fusing can also effectively control part process
Middle stress generates direction, and then the interior stress generated of different zones is allowed to cancel each other out, and achievees the purpose that eliminate stress.Meanwhile it protecting
Part has been demonstrate,proved with high precision and intensity.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, this
Field technical staff makes a little simple modification, equivalent variations or modification using the technology contents of the disclosure above, all falls within this hair
In bright protection scope.
Claims (9)
1. a kind of reinforced Laser Scanning for selective laser fusing, which is characterized in that the method includes walking as follows
It is rapid:
(1) a layer cross section profile file of workpiece is prepared needed for obtaining and is identified, with same in the profile region
The evenly distributed mode of polygonal shape carries out subregion；
(2) based on each polygon, the circumcircle of each polygon, and the circumcircle phase of adjacent polygons are generated
It hands over, deletes the rectilinear strip of the polygon；
(3) the circumcircle subregion of each polygon generated to step (2) is scanned filling, and the circumcircle intersects
Place carries out rescan filling.
2. reinforced Laser Scanning according to claim 1, which is characterized in that same more in the step (1)
Side shape shape is regular hexagon, regular quadrangle or equilateral triangle.
3. reinforced Laser Scanning according to claim 2, which is characterized 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, which is characterized 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, which is characterized 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, which is characterized in that the side length of the regular hexagon is 1
~10mm.
7. reinforced Laser Scanning according to claim 1, which is characterized in that described every in the step (3)
The circumcircle subregion of a polygon is scanned filling method particularly includes: first sweeps to the circumcircle subregion of a polygon
Retouch filling, then centered on the circumcircle subregion of the polygon 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
The scanning filling of shape circumcircle, and the polygon circumcircle subregion between adjacent each annular domain be sequentially filled it is contrary.
8. reinforced Laser Scanning according to any one of claims 1 to 7, which is characterized in that the method is also wrapped
It includes: after completing the scanning filling that step (3) carry out the circumcircle subregion of all polygons, completing the profile region
Frame scanning.
9. reinforced Laser Scanning according to claim 8, which is characterized in that the frame in the profile region
Scanning uses profile equal space line scanning 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 CN106984812A (en) | 2017-07-28 |
| CN106984812B true CN106984812B (en) | 2019-01-04 |
Family
ID=59415032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710213674.3A Active CN106984812B (en) | 2017-04-01 | 2017-04-01 | A kind of reinforced Laser Scanning for selective laser fusing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106984812B (en) |
Families Citing this family (11)
| 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 |
| CN107953552B (en) * | 2017-11-24 | 2019-12-31 | 湖南华曙高科技有限责任公司 | Laser scanning method, readable storage medium and laser scanning control device |
| CN109047759B (en) * | 2018-08-15 | 2021-04-27 | 南京理工大学 | A Laser Scanning Method to Improve Interlayer Strength and Reduce Warpage |
| CN109622965B (en) * | 2019-01-10 | 2021-07-16 | 西安智熔金属打印系统有限公司 | Electron beam selective melting forming preheating scanning method |
| CN110193603B (en) * | 2019-06-25 | 2021-04-23 | 鑫精合激光科技发展（北京）有限公司 | A Laser Selective Melting Partitioning Method Based on Scan Line Length Optimization |
| CN110625114B (en) * | 2019-09-26 | 2021-11-05 | 鑫精合激光科技发展（北京）有限公司 | A laser scanning method for coaxial powder feeding |
| 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 | A preheating scanning method and device for manufacturing three-dimensional objects |
| 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 |
| CN115891172A (en) * | 2022-12-02 | 2023-04-04 | 湖南华曙高科技股份有限公司 | Laser Scanning Method and 3D Printed Parts |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104985181A (en) * | 2015-08-05 | 2015-10-21 | 湖南华曙高科技有限责任公司 | Laser scanning method for manufacturing three-dimensional object |
| CN105665704A (en) * | 2016-03-11 | 2016-06-15 | 上海拓宝机电科技有限公司 | Metal laser selective melting method |
| CN106493367A (en) * | 2016-12-08 | 2017-03-15 | 鑫精合激光科技发展（北京）有限公司 | A kind of Laser Scanning for selective laser fusing |
| EP3147048A1 (en) * | 2015-09-28 | 2017-03-29 | Ecole Polytechnique Federale De Lausanne (Epfl) | Method and device for implementing laser shock peening (lsp) or warm laser shock peening (wlsp) during selective laser melting (slm) |
-
2017
- 2017-04-01 CN CN201710213674.3A patent/CN106984812B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104985181A (en) * | 2015-08-05 | 2015-10-21 | 湖南华曙高科技有限责任公司 | Laser scanning method for manufacturing three-dimensional object |
| EP3147048A1 (en) * | 2015-09-28 | 2017-03-29 | Ecole Polytechnique Federale De Lausanne (Epfl) | Method and device for implementing laser shock peening (lsp) or warm laser shock peening (wlsp) during selective laser melting (slm) |
| CN105665704A (en) * | 2016-03-11 | 2016-06-15 | 上海拓宝机电科技有限公司 | Metal laser selective melting method |
| CN106493367A (en) * | 2016-12-08 | 2017-03-15 | 鑫精合激光科技发展（北京）有限公司 | A kind of Laser Scanning for selective laser fusing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106984812A (en) | 2017-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106984812B (en) | A kind of reinforced Laser Scanning for selective laser fusing | |
| CN106493367A (en) | A kind of Laser Scanning for selective laser fusing | |
| JP6469498B2 (en) | Slice model region determination device, three-dimensional modeling system, and slice model region determination method | |
| CN104985181B (en) | Laser Scanning for manufacturing three-dimensional body | |
| US20160306901A1 (en) | Improvements in or relating to the building of supports in additive manufacturing | |
| US20210053119A1 (en) | Method for selectively irradiating a material layer, method for providing a data set, device and computer program product | |
| CN114713844B (en) | Metal selective laser melting forming method and system | |
| CN110462535B (en) | Three-dimensional object manufacturing method and device, control unit thereof, method and storage medium for providing control data | |
| CN107953552B (en) | Laser scanning method, readable storage medium and laser scanning control device | |
| US20210079796A1 (en) | Method for selectively irradiating a material layer, production method, and computer program product | |
| JP2017013426A (en) | Apparatus for fusing powder bed | |
| BR112019017273A2 (en) | method for controlling an irradiation system and device for layer-by-layer manufacturing | |
| CN107206493A (en) | Increasing material manufacturing equipment and increasing material manufacturing method | |
| US10723067B2 (en) | Stereolithography method comprising a vertical compensation process, as well as apparatus and computer program product suited to implement said method | |
| US20210001403A1 (en) | Processing system, processing method, computer program, recording medium and control apparatus | |
| CN112512729A (en) | Method for determining a build specification for an additive manufacturing method | |
| CN107952959A (en) | Laser Melting Deposition increasing material manufacturing component space grain form Forecasting Methodology | |
| CN119328168B (en) | Multi-model driven powder bed additive manufacturing method and device | |
| US11416655B2 (en) | Analysis mesh generation method, recording medium, and analysis mesh generation device | |
| CN106825570A (en) | For the section scanning processing method and system of three-dimensional body manufacture | |
| US20180239336A1 (en) | Device for controlling additive manufacturing machinery | |
| CN110126266A (en) | A kind of three-dimension object manufacturing method | |
| CN115489113B (en) | Laser scanning method, device and storage medium for three-dimensional object manufacturing | |
| CN109353004A (en) | Spot shaping method, apparatus, computer equipment and storage medium | |
| US20200108442A1 (en) | Defining a Transition Zone Between a Shell and Lattice Cell Array in a Three-Dimensional Printing System |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231025 Address after: 1108, Unit 1, 11th Floor, Building 1, No. 1 Courtyard, Energy East Road, Changping District, Beijing 102200 Patentee after: Beijing Xinjinghe Additive Manufacturing Technology Co.,Ltd. Address before: 101, 204, 205, Building 5, No. 97 Changping Road, Shahe Town, Changping District, Beijing, 100000 Patentee before: XINJINGHE LASER TECHNOLOGY DEVELOPMENT (BEIJING) Co.,Ltd. |