CN105537590A - Method for reducing hot stack influences of metal SLM three-dimensional printing - Google Patents
Method for reducing hot stack influences of metal SLM three-dimensional printing Download PDFInfo
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- CN105537590A CN105537590A CN201610075967.5A CN201610075967A CN105537590A CN 105537590 A CN105537590 A CN 105537590A CN 201610075967 A CN201610075967 A CN 201610075967A CN 105537590 A CN105537590 A CN 105537590A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
- B22F10/366—Scanning parameters, e.g. hatch distance or scanning strategy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- 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
A method for reducing hot stack influences of metal SLM three-dimensional printing specifically includes the following steps of firstly, dividing a three-dimensional data model into sheets with certain thicknesses, fine dividing each sheet into scanning lines at certain intervals, and completing before-processing data treatment; secondly, numbering the scanning lines at intervals in the sequence of a scanning route; thirdly, focusing a laser beam to fuse metal powder in a processing area spot by spot according to the scanning route under the control of a printing host to form metal sheet layers; fourthly, completing scanning of each metal sheet layer according to the scanning route to gradually form a three-dimensional metal object and finally complete three-dimensional printing. Printing time of a plurality of scanning lines exists between each scanning line and the previous scanning line in the printing process, cooling time is greatly prolonged, the hot stack effect is avoided or reduced, and processing quality stability in the whole scanning area is ensured; the printing process is still continuously conducted, and the overall printing time can not be prolonged.
Description
Technical field
The present invention relates to three-dimensional printing technology field, particularly a kind of metal SLM 3 D-printing reduces the method for hot stack impact.
Background technology
Selective laser melting (SLM) is an important branch in 3 D-printing field, is mainly used in the 3 D-printing processing of metal material.Its groundwork flow process is: be first cut into by three-dimensional data model and have certain thickness thin slice, then each thin slice is subdivided into the scan line of certain intervals, complete the data processing before processing; Subsequently, under software, laser focusing bundle carries out pointwise melting to the metal dust in machining area by scanning pattern, forms metal plate layer; Successively complete the scanning of every one deck, then progressively form three-dimensional metal objects, and finally complete 3 D-printing.
For the entity part in three-dimensional body, the scan line in process mutually overlaps, therefore, when existing continuous sweep, can heat build-up be formed, cause occurring local burning (to molten bath superheated) in metal level, affect the quality of product.
Fill processing for inside, when existing continuous sweep, the heat produced due to previous scan can not be dissipated in time, and the temperature of scanning area can be caused progressively to rise, and forms hot stack effect.In process, the molten bath formed due to laser fusion metal dust very little (diameter is usually at 100 microns), therefore concerning single melting point, its radiation processes is still than faster, but when scanning is carried out continuously, hot stack effect progressively manifests, and when heat build-up acquires a certain degree, will cause the generation of burn-off phenomenon.Fig. 1 is the laser continuous sweep schematic diagram of each scan line, when laser beam is by shown numbering continuous sweep, can form burning in the central area that radiating condition is relatively poor.If reduction laser power, the marginal portion of machining area can be caused again fully not melt, the quality of processing can be affected equally.
Summary of the invention
The present invention, for avoiding the weak point existing for above-mentioned prior art, provides a kind of method reducing heat build-up in metal SLM 3 D-printing process.Utilize the method given by the present invention, hot stack when large area is filled can be effectively reduced and, on the impact of metal selective lf process, improve the crudy of metal 3 D-printing with this.
Technical scheme of the present invention is achieved in that
Metal SLM 3 D-printing reduces a method for hot stack impact, and concrete steps are as follows:
(1) three-dimensional data model is cut into there is certain thickness thin slice, then each thin slice is subdivided into the scan line of certain intervals, complete the data processing before processing;
(2) be numbered scan line, numbering interval is carried out, and the order of numbering is scanning pattern;
(3) under the control printing main frame, laser focusing bundle carries out pointwise melting to the metal dust in machining area by scanning pattern, forms metal plate layer;
(4) complete the scanning of each metal plate layer according to scanning pattern, then progressively form three-dimensional metal objects, and finally complete 3 D-printing.
Preferably, the resolution ratio according to print thickness is numbered, and numbering interval is carried out.
Preferably, numbering is spaced apart 2 trace intervals.
Compared with prior art, the present invention has following beneficial effect:
Metal SLM 3 D-printing of the present invention reduces the method for hot stack impact, in print procedure every bar scan line all with time-write interval of last bar scan line spacings some scan lines, extend the heat radiation time greatly, avoid or reduce hot stack effect, ensure that the stable of crudy in whole scanning area; In addition, print procedure is still carry out continuously, can not extend the overall time-write interval.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the laser continuous sweep schematic diagram of each scan line of prior art;
Fig. 2 is the laser interval scan schematic diagram of each scan line of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Metal SLM 3 D-printing reduces a method for hot stack impact, and concrete steps are as follows:
(1) three-dimensional data model is cut into there is certain thickness thin slice, then each thin slice is subdivided into the scan line of certain intervals, complete the data processing before processing;
(2) be numbered scan line, numbering interval is carried out, and the order of numbering is scanning pattern;
(3) under the control printing main frame, laser focusing bundle carries out pointwise melting to the metal dust in machining area by scanning pattern, forms metal plate layer;
(4) complete the scanning of each metal plate layer according to scanning pattern, then progressively form three-dimensional metal objects, and finally complete 3 D-printing.
Further, the resolution ratio according to print thickness is numbered, and numbering interval is carried out, and improves the similarity of product and the model printed.
As shown in Figure 2, for the laser interval scan schematic diagram of each scan line, numbering is spaced apart 2 trace intervals, and laser beam scans by shown numbering, three groups are divided into by whole scan line, scanning is performed successively, like this, under whole scanning process still keeps continuous print condition by group, every bar scan line is two scan lines with last scan line spacings all, the heat radiation time extends greatly, avoid or reduces hot stack effect, ensure that the stable of crudy in whole scanning area.
Comprehensive method step of the present invention is known, metal SLM 3 D-printing of the present invention reduces the method for hot stack impact, in print procedure every bar scan line all with time-write interval of last bar scan line spacings some scan lines, extend the heat radiation time greatly, avoid or reduce hot stack effect, ensure that the stable of crudy in whole scanning area; In addition, print procedure is still carry out continuously, can not extend the overall time-write interval.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. metal SLM 3 D-printing reduces a method for hot stack impact, and it is characterized in that, concrete steps are as follows:
(1) three-dimensional data model is cut into there is certain thickness thin slice, then each thin slice is subdivided into the scan line of certain intervals, complete the data processing before processing;
(2) be numbered scan line, numbering interval is carried out, and the order of numbering is scanning pattern;
(3) under the control printing main frame, laser focusing bundle carries out pointwise melting to the metal dust in machining area by scanning pattern, forms metal plate layer;
(4) complete the scanning of each metal plate layer according to scanning pattern, then progressively form three-dimensional metal objects, and finally complete 3 D-printing.
2. metal SLM 3 D-printing as claimed in claim 1 reduces the method for hot stack impact, and it is characterized in that, the resolution ratio according to print thickness is numbered, and numbering interval is carried out.
3. metal SLM 3 D-printing as claimed in claim 1 or 2 reduces the method for hot stack impact, it is characterized in that, numbering is spaced apart 2 trace intervals.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610075967.5A CN105537590A (en) | 2016-02-01 | 2016-02-01 | Method for reducing hot stack influences of metal SLM three-dimensional printing |
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| CN201610075967.5A CN105537590A (en) | 2016-02-01 | 2016-02-01 | Method for reducing hot stack influences of metal SLM three-dimensional printing |
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| CN105537590A true CN105537590A (en) | 2016-05-04 |
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| CN201610075967.5A Pending CN105537590A (en) | 2016-02-01 | 2016-02-01 | Method for reducing hot stack influences of metal SLM three-dimensional printing |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108127115A (en) * | 2016-11-30 | 2018-06-08 | 吴江中瑞机电科技有限公司 | A kind of laser beam scan path generation method for increasing material manufacturing three-dimension object |
| CN109420760A (en) * | 2017-08-22 | 2019-03-05 | 湖南大学 | A kind of high energy beam planning parameters of scanning paths method for increasing material manufacturing |
| CN110976872A (en) * | 2019-12-31 | 2020-04-10 | 鑫精合激光科技发展（北京）有限公司 | Scanning method and scanning device |
| CN113084199A (en) * | 2021-06-10 | 2021-07-09 | 西安赛隆金属材料有限责任公司 | Additive manufacturing method of metal powder bed with refined grains |
| CN113351885A (en) * | 2021-08-11 | 2021-09-07 | 西安赛隆金属材料有限责任公司 | High-energy beam scanning path planning method, additive manufacturing method and device |
| CN113573839A (en) * | 2019-03-28 | 2021-10-29 | 德鱼塔工业股份有限公司 | Laser welding device and laser welding method |
| CN118002801A (en) * | 2024-04-09 | 2024-05-10 | 江苏塞霆激光科技有限公司 | 3D printing preparation method of metal dental crowns |
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| CN103846437A (en) * | 2012-12-01 | 2014-06-11 | 阿尔斯通技术有限公司 | Method for manufacturing a metallic component by additive laser manufacturing |
| CN103990799A (en) * | 2014-05-07 | 2014-08-20 | 华中科技大学 | Selective laser melting rapid forming device |
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| CN103846437A (en) * | 2012-12-01 | 2014-06-11 | 阿尔斯通技术有限公司 | Method for manufacturing a metallic component by additive laser manufacturing |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108127115A (en) * | 2016-11-30 | 2018-06-08 | 吴江中瑞机电科技有限公司 | A kind of laser beam scan path generation method for increasing material manufacturing three-dimension object |
| CN109420760A (en) * | 2017-08-22 | 2019-03-05 | 湖南大学 | A kind of high energy beam planning parameters of scanning paths method for increasing material manufacturing |
| CN113573839A (en) * | 2019-03-28 | 2021-10-29 | 德鱼塔工业股份有限公司 | Laser welding device and laser welding method |
| CN113573839B (en) * | 2019-03-28 | 2023-08-11 | 德鱼塔工业股份有限公司 | Laser welding device and laser welding method |
| CN110976872A (en) * | 2019-12-31 | 2020-04-10 | 鑫精合激光科技发展（北京）有限公司 | Scanning method and scanning device |
| CN110976872B (en) * | 2019-12-31 | 2021-10-01 | 鑫精合激光科技发展（北京）有限公司 | Scanning method and scanning device |
| CN113084199A (en) * | 2021-06-10 | 2021-07-09 | 西安赛隆金属材料有限责任公司 | Additive manufacturing method of metal powder bed with refined grains |
| CN113084199B (en) * | 2021-06-10 | 2021-11-02 | 西安赛隆金属材料有限责任公司 | Additive manufacturing method of metal powder bed with refined grains |
| CN113351885A (en) * | 2021-08-11 | 2021-09-07 | 西安赛隆金属材料有限责任公司 | High-energy beam scanning path planning method, additive manufacturing method and device |
| CN118002801A (en) * | 2024-04-09 | 2024-05-10 | 江苏塞霆激光科技有限公司 | 3D printing preparation method of metal dental crowns |
| CN118002801B (en) * | 2024-04-09 | 2024-06-11 | 江苏塞霆激光科技有限公司 | 3D printing preparation method of metal dental crowns |
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Application publication date: 20160504 |