CN103567441A - Laser powder sintering method for 3D printer - Google Patents
Laser powder sintering method for 3D printer Download PDFInfo
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- CN103567441A CN103567441A CN201310514029.7A CN201310514029A CN103567441A CN 103567441 A CN103567441 A CN 103567441A CN 201310514029 A CN201310514029 A CN 201310514029A CN 103567441 A CN103567441 A CN 103567441A
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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
Abstract
The invention discloses a laser powder sintering method for a 3D printer, which comprises the following steps: a, adding powder: adding the powder for sintering into a powder groove consisting of a scraper; b, scraping the powder: uniformly spreading the powder in the powder groove on a working platform by the scraper; c, carrying out layer sintering on a frame outline: starting a laser scanning system, guiding a laser beam to focus on the powder on the working platform, scanning a powder layer by a light spot focused on the working table and sintering the single-layer outline of a product; d, carrying out layer sintering filling: according to the required filling size in the outline, regulating the diameter of the laser beam of the laser scanning system through a real-time magnification regulation beam expander so as to regulate the diameter of the light spot focused on the working plane, calculate the fastest path and guide the laser beam to focus on the powder on the working platform, scanning on the powder by the light spot focused on the working platform, and sintering a single-layer filled part of the product; e, repeating the steps a to d until the product is formed.
Description
[technical field]
The present invention relates to 3D printing technique.
[background technology]
Existing 3D laser printer is all the laser beam that adopts same diameter when printed product, the spot diameter size focusing on like this on workbench is also the same, in print procedure, the diameter of laser beam can not change, thereby the spot diameter focusing on workbench can not change yet, so product profile or filling part all adopt the same diameter to scan when sintering, because laser beam focusing is meticulousr to the less scanning of the spot diameter on workbench product out, so in order to guarantee the meticulous laser beam that diameter is large (laser beam diameter and focal beam spot diameter are inversely proportional to) that can use of product profile, fill is exactly that remaining area of section after frame scanning has been filled.Fill the intensity just affect workpiece, thus as long as energy is enough, with the dimensional accuracy in cross section, be that it doesn't matter, and the identical laser beam scanning filling of laser beam diameter while adopting with scanning frame partly will expend long time.
[summary of the invention]
In order to solve deficiency of the prior art, the processing step of the time of scanning in a kind of 3D of shortening printer laser powder sintering method process is provided, the method applied in the present invention is:
A printer laser powder sintering method, comprises the steps:
A. add powder: the powder of sintering is added in the powder groove being comprised of scraper.
B. scrape powder: the scraper that has added powder in powder groove moves on workbench, the powder in powder groove is sprinkled upon on workbench by scraper uniform spreading.
C. layer sintering frame profile: open laser scanning system, guide laser beam focuses on the powder of workbench, and the hot spot focusing on workbench scans on powder bed, and sintering goes out the individual layer profile of product.
D. layer sintering filled: the size of filling according to profile domestic demand regulates beam expanding lens to regulate the diameter of laser scanning system laser beam by real-time multiplying power, thereby adjust the size of the spot diameter that focuses on working face, and calculate the fastest path, guide laser beam focuses on the powder of workbench, the hot spot focusing on workbench scans on powder, the individual layer filling part of sintering place product.
E. repeat a to d step until formed product.
Powder in described step a is macromolecular material or metal material.
In described steps d, focus on spot diameter on workbench and be 2 to 5 times of the spot diameter that focuses in step c on workbench.
The laser spot diameter magnitude range that focuses on working face in step c is: 0.1mm to 0.4 millimeter.
The laser spot diameter magnitude range that focuses on working face in steps d is: 0.2mm is to 0.8mm.
Adopt 3D printer laser powder sintering method recited above, Laser Focusing hot spot due to product frame employing minor diameter, the filling part of product adopts larger-diameter Laser Focusing hot spot, so its profile of product that adopts the method to scan is out meticulous, and process velocity is fast, shorten the production time.
[accompanying drawing explanation]
Fig. 1 is that the present invention scrapes powder view.
Fig. 2 is laser facula scanning mode schematic diagram of the present invention.
Description of reference numerals
1 workbench, 2 powder beds, 3 powder, 4 scrapers, 5 powder grooves, 6 products, hot spot when A is scanning product profile, hot spot when B is scanning product filling part.
[specific embodiment]
On existing 3D printer basis, set up a real-time multiplying power and regulated beam expanding lens, be used for adjusting the size of laser beam diameter, because the size of laser beam diameter with focus on that on workbench, to be used for the laser spot diameter size of sintered powder inversely proportional, so can regulate laser spot diameter size after adopting real-time multiplying power to regulate beam expanding lens.Being provided with real-time multiplying power regulates the 3D printer laser powder sintering method of beam expanding lens as follows:
A. add powder: the powder of sintering is added in the powder groove being comprised of scraper.
B. scrape powder: the scraper that has added powder in powder groove moves on workbench, the powder in powder groove is sprinkled upon on workbench by scraper uniform spreading.(as Fig. 1)
C. layer sintering frame profile: open laser scanning system, guide laser beam focuses on the powder of workbench, and the hot spot focusing on workbench scans on powder bed, and sintering goes out the individual layer profile of product.
D. layer sintering filled: the size of filling according to profile domestic demand regulates beam expanding lens to regulate the diameter of laser scanning system laser beam by real-time multiplying power, thereby adjust the size of the spot diameter that focuses on working face, and calculate the fastest path, guide laser beam focuses on the powder of workbench, the hot spot focusing on workbench scans on powder, the individual layer filling part of sintering place product.
E. repeat a to d step until formed product.
Step is played the funnel shaped groove that the powder groove in a is comprised of two scrapers, powder is just added in powder groove, when scraper moves on workbench, the powder in powder groove can be spread and is sprinkled upon on workbench uniformly, form powder bed, this powder is macromolecular material or metal material, in the situation of being heated, can be bonded together.
As Fig. 2 laser scanning system is opened rear laser beam focusing to the powder bed of workbench, scanning product profile adopts while rising is the profile that the laser facula sintering of minor diameter goes out product, because the profile of the less sintering of laser spot diameter product is out meticulousr.Treat that profile sintering is complete, multiplying power regulates beam expanding lens to change laser light velocity diameter by calculating in real time, dwindle the diameter of laser beam, thereby the laser spot diameter that makes to focus on workbench increases, start to scan product filling part, because filling part does not require precision, as long as intensity enough, so adopt large diameter laser facula (to be generally 2 to 5 times of scanning profile laser spot diameter, during scanning profile, laser spot diameter magnitude range is that 0.1mm is to 0.4mm, during scanning filling part, laser spot diameter magnitude range is that 0.2mm is to 0.8mm), the area of hot spot when the Area Ratio scanning profile at each sintering place wants large during scanning filling part like this, can effectively reduce scanning times, shortened the time of product processing.In the time of scanning filling, the size of hot spot can be adjusted in real time according to the feature of scanning.
Because it is that product employing laser scanning sintering is in layer processed that 3D prints, thus the complete one deck of sintering according to a above to the step cycle of d, until whole product processes.
As Fig. 2 it is also to be noted that, when running into the product of angular shape, if filling part adopts large diameter hot spot to exceed the contour edge of product, after needing first wedge angle partly to be adopted the laser light hot spot of minor diameter to process, the filling part at other positions adopts large diameter laser facula to scan sintering again.
Claims (5)
1. a 3D printer laser powder sintering method, comprises the steps:
A. add powder: the powder of sintering is added in the powder groove being comprised of scraper.
B. scrape powder: the scraper that has added powder in powder groove moves on workbench, the powder in powder groove is sprinkled upon on workbench by scraper uniform spreading.
C. layer sintering frame profile: open laser scanning system, guide laser beam focuses on the powder of workbench, and the hot spot focusing on workbench scans on powder bed, and sintering goes out the individual layer profile of product.
D. layer sintering filled: the size of filling according to profile domestic demand regulates beam expanding lens to regulate the diameter of laser scanning system laser beam by real-time multiplying power, thereby adjust the size of the spot diameter that focuses on working face, and calculate the fastest path, guide laser beam focuses on the powder of workbench, the hot spot focusing on workbench scans on powder, the individual layer filling part of sintering place product.
E. repeat a to d step until formed product.
2. a kind of 3D printer laser powder sintering method according to claim 1, is characterized in that: the powder in described step a is macromolecular material or metal material.
3. a kind of 3D printer laser powder sintering method according to claim 1 and 2, is characterized in that: in described steps d, focus on spot diameter on workbench and be 2 to 5 times of the spot diameter that focuses in step c on workbench.
4. a kind of 3D printer laser powder sintering method according to claim 1, is characterized in that: the laser spot diameter magnitude range that focuses on working face in step c is: 0.1mm to 0.4 millimeter.
5. a kind of 3D printer laser powder sintering method according to claim 1, is characterized in that: the laser spot diameter magnitude range that focuses on working face in steps d is: 0.2mm is to 0.8mm.
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| CN201310514029.7A CN103567441A (en) | 2013-10-25 | 2013-10-25 | Laser powder sintering method for 3D printer |
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| CN201310514029.7A CN103567441A (en) | 2013-10-25 | 2013-10-25 | Laser powder sintering method for 3D printer |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103894608A (en) * | 2014-03-04 | 2014-07-02 | 浙江大学 | Three-dimensional printing large light spot scanning path generation method |
| CN104226997A (en) * | 2014-09-12 | 2014-12-24 | 徐海锋 | 3D (three-dimensional) metal printing method |
| WO2016026706A1 (en) | 2014-08-20 | 2016-02-25 | Etxe-Tar, S.A. | Method and system for additive manufacturing using a light beam |
| CN105665701A (en) * | 2015-06-03 | 2016-06-15 | 哈尔滨福沃德多维智能装备有限公司 | Method for conducting melting forming through laser powder scanning |
| CN105710368A (en) * | 2016-03-03 | 2016-06-29 | 西安铂力特激光成形技术有限公司 | Scanning path planning method for manufacturing three-dimensional body layer by layer and scanning method |
| CN106513676A (en) * | 2016-08-23 | 2017-03-22 | 西北工业大学 | Light spot and powder spot automatic collaboration controlled laser metal added material manufacturing device and method |
| CN106513677A (en) * | 2016-11-28 | 2017-03-22 | 南通金源智能技术有限公司 | Process monitoring system for laser precision forming technology and monitoring method thereof |
| CN107498052A (en) * | 2017-09-22 | 2017-12-22 | 华中科技大学 | A kind of load balancing for more laser SLM building mortions scans manufacturing process |
| CN109532005A (en) * | 2018-11-20 | 2019-03-29 | 广州捷和电子科技有限公司 | A kind of adaptive hot spot Method of printing of 3D photocuring dynamic focusing |
| CN109773186A (en) * | 2019-01-30 | 2019-05-21 | 湖南华曙高科技有限责任公司 | For manufacturing the increasing material manufacturing method and its equipment, readable storage medium storing program for executing of three-dimension object |
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| CN1814380A (en) * | 2006-03-01 | 2006-08-09 | 苏州大学 | Laser spot coating-shaping process and coaxial spray head |
| CN201168783Y (en) * | 2008-02-03 | 2008-12-24 | 何德生 | Laser powder sintering rapid forming machine |
| CN101670432A (en) * | 2009-07-14 | 2010-03-17 | 黑龙江科技学院 | New method used for realizing powder melting and forming based on laser scanning |
| CN102229245A (en) * | 2011-04-27 | 2011-11-02 | 西安交通大学 | Photocuring rapid forming method adopting variable light spot process |
| CN103157904A (en) * | 2013-03-01 | 2013-06-19 | 张立国 | Laser processing device based on dynamic focusing |
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Patent Citations (5)
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| CN1814380A (en) * | 2006-03-01 | 2006-08-09 | 苏州大学 | Laser spot coating-shaping process and coaxial spray head |
| CN201168783Y (en) * | 2008-02-03 | 2008-12-24 | 何德生 | Laser powder sintering rapid forming machine |
| CN101670432A (en) * | 2009-07-14 | 2010-03-17 | 黑龙江科技学院 | New method used for realizing powder melting and forming based on laser scanning |
| CN102229245A (en) * | 2011-04-27 | 2011-11-02 | 西安交通大学 | Photocuring rapid forming method adopting variable light spot process |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103894608B (en) * | 2014-03-04 | 2015-11-18 | 浙江大学 | A kind of 3 D-printing large spot scanning pattern generation method |
| CN103894608A (en) * | 2014-03-04 | 2014-07-02 | 浙江大学 | Three-dimensional printing large light spot scanning path generation method |
| US10688561B2 (en) | 2014-08-20 | 2020-06-23 | Etxe-Tar, S.A. | Method and system for additive manufacturing using a light beam |
| WO2016026706A1 (en) | 2014-08-20 | 2016-02-25 | Etxe-Tar, S.A. | Method and system for additive manufacturing using a light beam |
| CN104226997A (en) * | 2014-09-12 | 2014-12-24 | 徐海锋 | 3D (three-dimensional) metal printing method |
| CN105665701A (en) * | 2015-06-03 | 2016-06-15 | 哈尔滨福沃德多维智能装备有限公司 | Method for conducting melting forming through laser powder scanning |
| CN105710368A (en) * | 2016-03-03 | 2016-06-29 | 西安铂力特激光成形技术有限公司 | Scanning path planning method for manufacturing three-dimensional body layer by layer and scanning method |
| CN106513676A (en) * | 2016-08-23 | 2017-03-22 | 西北工业大学 | Light spot and powder spot automatic collaboration controlled laser metal added material manufacturing device and method |
| CN106513677A (en) * | 2016-11-28 | 2017-03-22 | 南通金源智能技术有限公司 | Process monitoring system for laser precision forming technology and monitoring method thereof |
| CN107498052A (en) * | 2017-09-22 | 2017-12-22 | 华中科技大学 | A kind of load balancing for more laser SLM building mortions scans manufacturing process |
| CN109532005A (en) * | 2018-11-20 | 2019-03-29 | 广州捷和电子科技有限公司 | A kind of adaptive hot spot Method of printing of 3D photocuring dynamic focusing |
| CN109532005B (en) * | 2018-11-20 | 2021-08-10 | 广州捷和电子科技有限公司 | 3D photocuring dynamic focusing self-adaptive light spot printing method |
| CN109773186A (en) * | 2019-01-30 | 2019-05-21 | 湖南华曙高科技有限责任公司 | For manufacturing the increasing material manufacturing method and its equipment, readable storage medium storing program for executing of three-dimension object |
| CN109773186B (en) * | 2019-01-30 | 2021-07-02 | 湖南华曙高科技有限责任公司 | Additive manufacturing method for manufacturing three-dimensional object, apparatus thereof, and readable storage medium |
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