CN108016034B - Photocuring laser scanning system and method - Google Patents
Photocuring laser scanning system and method Download PDFInfo
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- CN108016034B CN108016034B CN201711352283.6A CN201711352283A CN108016034B CN 108016034 B CN108016034 B CN 108016034B CN 201711352283 A CN201711352283 A CN 201711352283A CN 108016034 B CN108016034 B CN 108016034B
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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
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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Abstract
The application discloses photocuring laser scanning system and method, and the system comprises: a powder bed on which a powder layer can be laid; a plurality of laser modules, each laser module for generating a laser beam for solidifying the powder material on the powder bed, each laser beam corresponding to a different scanning area in each powder layer; laser scanner, is used for each laser beam of independent guide respectively along the scanning path solidification of straight line corresponding scanning area, and different laser beams form overlap area between adjacent scanning area, and satisfy: in the same powder layer, the laser beam generated by the same laser module at least has two scanning paths with different lengths, and/or the lengths of at least one upper and lower corresponding scanning path in the adjacent powder layers are different. The overlapping positions of the scanning areas are arranged in a staggered mode, so that the over-curing positions are prevented from being concentrated on one line or one surface, and the strength of a finished product is improved.
Description
Technical Field
The application relates to the technical field of 3D printing, in particular to a photocuring laser scanning system and a photocuring laser scanning method.
Background
The photocuring 3D printing technology has the advantages of high forming precision, good surface smoothness, high material utilization rate, high forming speed, capability of manufacturing hollow and fine structures and the like, is a rapid forming method which is the most deep research, the most mature technology and the most wide application at present, and has the market share up to 70%.
The principle of the photocuring 3D printing technology is that a computer controls a laser to emit a light beam to scan the surface of liquid photosensitive resin in a certain path, a resin thin layer in a scanned area is cured by photopolymerization to form a thin layer of a part, then a workbench moves downwards for a certain distance, a new layer of liquid resin is coated on the surface of the cured resin, and the next layer of liquid resin is scanned and processed, and the steps are repeated until the whole product is manufactured.
In the prior art, single laser modules are adopted to realize single curing line by line, and although the forming quality is high, the forming time is long and the efficiency is low. In order to improve the curing efficiency, two laser modules can be used to divide two scanning areas for curing respectively, the two scanning areas have an overlapping area, the overlapping area is divided from the middle of the whole scanning area along the middle line direction, and the problems at least include: the overlapped area is over-cured, and the over-cured position is concentrated in the on-line direction, so that a fragile section is easily formed in the middle line direction, the strength is low, and the quality of a finished product is influenced.
Disclosure of Invention
It is an object of the present invention to provide a photocuring laser scanning system and method to overcome the problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the embodiment of the application discloses photocuring laser scanning system includes:
a powder bed on which a powder layer can be laid;
a plurality of laser modules, each laser module for generating a laser beam for solidifying the powder material on the powder bed, each laser beam corresponding to a different scanning area in each powder layer;
laser scanner, is used for each laser beam of independent guide respectively along the scanning path solidification of straight line corresponding scanning area, and different laser beams form overlap area between adjacent scanning area, and satisfy:
the laser beams generated by the same laser module in the same powder layer have at least two scanning paths with different lengths, and/or
The lengths of at least one upper and lower corresponding scanning path in adjacent powder layers are different.
Preferably, in the above-mentioned photocuring laser scanning system,
in the same powder layer, the overlapping area of adjacent scanning areas is along a non-linear direction or a line which is not perpendicular to the scanning path direction, and/or
In adjacent powder layers, the overlapping areas of the scanning areas do not at least partially correspond up and down.
Preferably, in the above-mentioned photocuring laser scanning system, each of the scanning areas includes a plurality of linear scanning paths in a row in the same powder layer.
Preferably, in the above-mentioned photocuring laser scanning system, the straight-line scanning path between adjacent rows is discontinuous.
Preferably, in the above-mentioned photocuring laser scanning system, the scanning path overlapping points in adjacent rows are discontinuous in the same powder layer.
Preferably, in the above-described photocuring laser scanning system, an edge where each scanning area overlaps is a non-linear shape.
Preferably, in the above-mentioned photocuring laser scanning system, 2 laser modules are included.
The application also discloses a photocuring laser scanning method, wherein a plurality of laser beams respectively correspond to different scanning areas in each powder layer, each laser beam respectively and independently solidifies the corresponding scanning area along a linear scanning path, overlapping areas are formed between adjacent scanning areas by different laser beams, and at least one adjacent overlapping area is staggered in the same powder layer.
The application also discloses a photocuring laser scanning method, wherein a plurality of laser beams respectively correspond to different scanning areas in each powder layer, each laser beam respectively and independently solidifies the corresponding scanning area along a linear scanning path, overlapping areas are formed between the adjacent scanning areas by the different laser beams, and at least part of the upper and lower adjacent overlapping areas in the upper and lower adjacent powder layers are staggered in the horizontal direction.
The application also discloses a photocuring laser scanning method, a plurality of laser beams correspond to different scanning areas in each powder layer respectively, each laser beam solidifies corresponding scanning area along the linear scanning path separately, different laser beams form overlapping areas between adjacent scanning areas, in the same powder layer, at least one adjacent overlapping area is staggered, and the following requirements are met: in the upper and lower adjacent powder layers, at least part of the upper and lower adjacent overlapping areas are staggered in the horizontal direction.
Compared with the prior art, the invention has the advantages that: the overlapping positions of the scanning areas are arranged in a staggered mode, so that the over-curing positions are prevented from being concentrated on one line or one surface, and the strength of a finished product is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram illustrating a scanning method of a photocuring laser according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a scanning method of a photocuring laser according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a scanning method of a photocuring laser according to a third embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a principle of a scanning method of a photocuring laser according to a fourth embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment discloses a photocuring laser scanning system, which comprises:
a powder bed on which a powder layer can be laid;
a plurality of laser modules, each laser module for generating a laser beam for solidifying the powder material on the powder bed, each laser beam corresponding to a different scanning area in each powder layer;
laser scanner, is used for each laser beam of independent guide respectively along the scanning path solidification of straight line corresponding scanning area, and different laser beams form overlap area between adjacent scanning area, and satisfy:
the laser beams generated by the same laser module in the same powder layer have at least two scanning paths with different lengths, and/or
The lengths of at least one upper and lower corresponding scanning path in adjacent powder layers are different.
When the laser curing device works, each laser module respectively and independently generates a laser beam, the laser beams are subjected to photocuring in the corresponding scanning area, each scanning area respectively comprises a row of scanning paths, the laser beams are moved to the next row after the photocuring of one scanning path is finished along the transverse direction, the photocuring is carried out on the next scanning path, and after one layer is formed, the photocuring is carried out on the powder of the next layer continuously until the printing of a product is finished.
In this case, the number of the laser modules is preferably 2, so as to double the efficiency of single light curing, and in other embodiments, 3 or more than 3 laser modules may be used for simultaneous light curing. After a plurality of scanning areas are overlapped, the whole forming surface is formed, and the light curing efficiency can be greatly improved.
As shown in fig. 1, in the first embodiment of the present invention, 2 laser beams respectively correspond to different scanning areas in the same powder layer: a laser beam 1 scanning area and a laser beam 2 scanning area. Each laser beam solidifies the corresponding scanning area along the linear scanning path.
An overlapping area is formed between the two scanning areas, and the overlapping areas positioned between different rows are arranged in a staggered mode.
In this embodiment, the overlapping areas of all rows are staggered, i.e., located at different vertical (perpendicular to the scan path) positions in fig. 1.
In a second embodiment of the invention, illustrated in connection with fig. 2, 2 laser beams correspond to different scanning areas in the same powder layer: a laser beam 1 scanning area and a laser beam 2 scanning area. Each laser beam solidifies the corresponding scanning area along the linear scanning path.
An overlapping area is formed between the two scanning areas, and the overlapping areas between adjacent rows are arranged in a staggered mode.
Unlike the first embodiment, the overlapping areas in this embodiment are periodically distributed along the line direction, that is, the overlapping areas in the 1 st and 3 rd rows are located at the same vertical line position (the scanning path lengths are the same), and the overlapping areas in the 2 nd and 4 th rows are located at the same vertical line position.
In a third embodiment of the present invention, as shown in fig. 3, 2 laser beams respectively correspond to different scanning areas in each powder layer, each laser beam respectively solidifies the corresponding scanning area along a straight scanning path, and the different laser beams form an overlapping area between the adjacent scanning areas.
In the upper and lower adjacent powder layers, at least part of the upper and lower adjacent overlapping areas are staggered in the horizontal direction.
In this embodiment, all the overlapping areas (the pattern filling portions in the figure) are arranged in a staggered manner.
In a fourth embodiment of the present invention, as shown in fig. 4, 2 laser beams respectively correspond to different scanning areas in each powder layer, each laser beam respectively solidifies the corresponding scanning area along a straight scanning path, and the different laser beams form an overlapping area between the adjacent scanning areas.
In the upper and lower adjacent powder layers, at least part of the upper and lower adjacent overlapping areas are staggered in the horizontal direction.
In this embodiment, different from the third embodiment, the overlapping regions are periodically arranged in different layer directions.
In the fifth embodiment of the present invention, the requirement of the scan path satisfies the requirements of implementing one and the third embodiment, or implementing one and the fourth embodiment, or implementing two and the third embodiment, or implementing two and the fourth embodiment at the same time.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (6)
1. A photocuring laser scanning system, comprising:
a powder bed on which a powder layer can be laid;
a plurality of laser modules, each laser module for generating a laser beam for solidifying the powder material on the powder bed, each laser beam corresponding to a different scanning area in each powder layer;
laser scanner, is used for each laser beam of independent guide respectively along the scanning path solidification of straight line corresponding scanning area, and different laser beams form overlap area between adjacent scanning area, and satisfy:
in the same powder layer, the laser beam generated by the same laser module at least has two scanning paths with different lengths, and the overlapping area of the adjacent scanning areas is along the non-linear direction or the linear direction which is not perpendicular to the scanning paths, an
In adjacent powder layers, the lengths of at least one scanning path corresponding to the upper part and the lower part of the overlapping area of the scanning areas are different, and the upper part and the lower part of the overlapping area of the scanning areas are not corresponding.
2. The photocuring laser scanning system of claim 1, wherein: in the same powder layer, each scanning area comprises a plurality of linear scanning paths in a row.
3. The photocuring laser scanning system of claim 2, wherein: the straight scan path between adjacent rows is discontinuous.
4. The photocuring laser scanning system of claim 2, wherein: in the same powder layer, there is a discontinuity between scan path overlap points in adjacent rows.
5. The photocuring laser scanning system of claim 2, wherein: the edge where each scan region overlaps is non-linear in shape.
6. The photocuring laser scanning system of claim 1, wherein: including 2 laser modules.
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| DE102017126624A1 (en) * | 2017-11-13 | 2019-05-16 | Trumpf Laser- Und Systemtechnik Gmbh | LAYERED LIGHT EXPOSURE IN GENERATIVE MANUFACTURING |
| WO2019113949A1 (en) * | 2017-12-15 | 2019-06-20 | 吴江中瑞机电科技有限公司 | Laser scanning system and method for light curing |
| CN108437455A (en) * | 2018-04-28 | 2018-08-24 | 湖南华曙高科技有限责任公司 | More Laser Scannings for increasing material manufacturing |
| CN110893685A (en) * | 2018-09-12 | 2020-03-20 | 上海探真激光技术有限公司 | Multi-channel scanning system and scanning method thereof |
| EP3722075B1 (en) | 2019-04-08 | 2022-06-29 | LayerWise N.V. | Three-dimensional printing system optimizing seams between zones for multiple energy beams |
| CN111175786B (en) * | 2019-10-14 | 2022-05-03 | 岭纬科技（厦门）有限公司 | Multi-path crosstalk-eliminating wide-view-field high-resolution solid-state laser radar |
| CN118106509B (en) * | 2024-03-28 | 2024-08-16 | 安世数擎(杭州)信息科技服务有限公司 | Multi-energy beam cooperation powder bed three-dimensional forming method |
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| ES2670977T3 (en) * | 2013-02-14 | 2018-06-04 | Renishaw Plc. | Selective laser solidification apparatus and method |
| US10335901B2 (en) * | 2013-06-10 | 2019-07-02 | Renishaw Plc | Selective laser solidification apparatus and method |
| GB201420717D0 (en) * | 2014-11-21 | 2015-01-07 | Renishaw Plc | Additive manufacturing apparatus and methods |
| GB201420716D0 (en) * | 2014-11-21 | 2015-01-07 | Renishaw Plc | Additive manufacturing apparatus and methods |
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Address after: 215223 No. 13 Tongan West Road, Wujiang District, Jiangsu, Suzhou Applicant after: Suzhou Zhong Rui Zhi Chuang 3D Polytron Technologies Inc Address before: 215223 No. 13 Tongan West Road, Wujiang District, Jiangsu, Suzhou Applicant before: Z Rapid Technologies Co., Ltd. |
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