CN107614161B - 用于添加式地制造三维物体的设备 - Google Patents

用于添加式地制造三维物体的设备 Download PDF

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Publication number
CN107614161B
CN107614161B CN201780001713.1A CN201780001713A CN107614161B CN 107614161 B CN107614161 B CN 107614161B CN 201780001713 A CN201780001713 A CN 201780001713A CN 107614161 B CN107614161 B CN 107614161B
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magnetic
movement
building
plane
building plane
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Chinese (zh)
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CN107614161A (zh
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F·赫尔佐克
F·贝希曼
F·措伊尔纳
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Concept Laser GmbH
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CL Schutzrechtsverwaltung GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/141—Processes of additive manufacturing using only solid materials
    • B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
    • 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
    • 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
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/22—Driving means
    • 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
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/40—Radiation means
    • B22F12/41—Radiation means characterised by the type, e.g. laser or electron beam
    • 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
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/40—Radiation means
    • B22F12/44—Radiation means characterised by the configuration of the radiation means
    • B22F12/45—Two or more
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/001—Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/227—Driving means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/264—Arrangements for irradiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/264—Arrangements for irradiation
    • B29C64/268—Arrangements for irradiation using laser beams; using electron beams [EB]
    • 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
    • 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
    • B22F10/32—Process control of the atmosphere, e.g. composition or pressure in a building chamber
    • 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
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/40—Radiation means
    • B22F12/46—Radiation means with translatory movement
    • 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
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/40—Radiation means
    • B22F12/46—Radiation means with translatory movement
    • B22F12/47—Radiation means with translatory movement parallel to the deposition plane
    • 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
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/40—Radiation means
    • B22F12/46—Radiation means with translatory movement
    • B22F12/48—Radiation means with translatory movement in height, e.g. perpendicular to the deposition plane
    • 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
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/40—Radiation means
    • B22F12/49—Scanners
    • 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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/264—Arrangements for irradiation
    • B29C64/277—Arrangements for irradiation using multiple radiation means, e.g. micromirrors or multiple light-emitting diodes [LED]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/264—Arrangements for irradiation
    • B29C64/277—Arrangements for irradiation using multiple radiation means, e.g. micromirrors or multiple light-emitting diodes [LED]
    • B29C64/282—Arrangements for irradiation using multiple radiation means, e.g. micromirrors or multiple light-emitting diodes [LED] of the same type, e.g. using different energy levels
    • 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)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Ceramic Engineering (AREA)
  • Powder Metallurgy (AREA)
CN201780001713.1A 2016-03-08 2017-02-27 用于添加式地制造三维物体的设备 Active CN107614161B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102016104180.7A DE102016104180A1 (de) 2016-03-08 2016-03-08 Vorrichtung zur additiven Herstellung eines dreidimensionalen Objekts
DE102016104180.7 2016-03-08
PCT/EP2017/054496 WO2017153195A1 (de) 2016-03-08 2017-02-27 Vorrichtung zur additiven herstellung eines dreidimensionalen objekts

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CN107614161A CN107614161A (zh) 2018-01-19
CN107614161B true CN107614161B (zh) 2021-04-20

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US (2) US11052605B2 (enExample)
EP (1) EP3426425B1 (enExample)
JP (2) JP2018523755A (enExample)
CN (1) CN107614161B (enExample)
DE (1) DE102016104180A1 (enExample)
WO (1) WO2017153195A1 (enExample)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018200566B4 (de) * 2018-01-15 2021-07-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. System und Verfahren zur Überwachung der Fertigungsgenauigkeit bei der additiven Herstellung dreidimensionaler Bauteile
US11014189B2 (en) * 2018-05-25 2021-05-25 General Electric Company Method to control additive manufacturing builds using laser angle of incidence
CN111496251A (zh) * 2020-03-30 2020-08-07 昆明七零五所科技发展有限责任公司 一种无需支撑的金属选区熔融直接成型3d打印方法
EP4353450A1 (de) * 2022-10-13 2024-04-17 SOMIC Verpackungsmaschinen GmbH & Co. KG Vorrichtung zur additiven fertigung

Family Cites Families (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19541085C2 (de) * 1995-11-03 2000-03-30 Heinz Peter Brandstetter Bearbeitungsstand mit planaren elektromagnetischen Zwei-Koordinaten-Direktantrieben
US6054077A (en) 1999-01-11 2000-04-25 Stratasys, Inc. Velocity profiling in an extrusion apparatus
US6751516B1 (en) * 2000-08-10 2004-06-15 Richardson Technologies, Inc. Method and system for direct writing, editing and transmitting a three dimensional part and imaging systems therefor
JP4916392B2 (ja) * 2007-06-26 2012-04-11 パナソニック株式会社 三次元形状造形物の製造方法及び製造装置
US9075409B2 (en) * 2011-06-28 2015-07-07 Global Filtration Systems Apparatus and method for forming three-dimensional objects using linear solidification
CA2838255C (en) 2011-06-28 2019-08-20 Global Filtration Systems Method for forming three-dimensional objects using linear solidification
JP2013049137A (ja) 2011-08-30 2013-03-14 Sony Corp 除粉装置、造形システム及び造形物の製造方法
JP6071641B2 (ja) 2013-02-27 2017-02-01 三菱重工業株式会社 加工装置、加工方法
WO2014144630A1 (en) * 2013-03-15 2014-09-18 Matterfab Corp. Cartridge for an additive manufacturing apparatus and method
JP6359640B2 (ja) 2013-04-26 2018-07-18 ユナイテッド テクノロジーズ コーポレイションＵｎｉｔｅｄ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏｒｐｏｒａｔｉｏｎ 選択的レーザー溶融システム
US10562132B2 (en) * 2013-04-29 2020-02-18 Nuburu, Inc. Applications, methods and systems for materials processing with visible raman laser
GB201310398D0 (en) 2013-06-11 2013-07-24 Renishaw Plc Additive manufacturing apparatus and method
DE102013011676A1 (de) * 2013-07-11 2015-01-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zur generativen Bauteilfertigung
US10086566B2 (en) * 2014-01-02 2018-10-02 Old World Labs Apparatus for production of three-dimensional objects by stereolithography
JP2015157405A (ja) * 2014-02-24 2015-09-03 株式会社ソディック 積層造形方法および積層造形装置
CN103909268B (zh) 2014-04-19 2018-02-06 张远明 金属粉末浆料的大尺寸固态自由成型打印机及打印方法
CN103990798B (zh) 2014-05-06 2015-10-21 华中科技大学 一种用于激光增材制造的高温粉床系统
EP2942130B1 (de) * 2014-05-09 2019-01-30 MTU Aero Engines GmbH Vorrichtung und Verfahren zur generativen Herstellung zumindest eines Bauteilbereichs
CN106922135B (zh) * 2014-11-14 2020-07-14 株式会社尼康 造型装置及造型方法
JP6840540B2 (ja) * 2014-11-14 2021-03-10 株式会社ニコン 造形装置
US10383080B2 (en) 2015-01-26 2019-08-13 Intel IP Corporation Device and method to improve horizontal and vertical positioning accuracy
GB201505458D0 (en) * 2015-03-30 2015-05-13 Renishaw Plc Additive manufacturing apparatus and methods
SG11201708252WA (en) * 2015-04-07 2017-11-29 Trio Labs Inc Method and apparatus for solid freeform fabrication of objects with improved resolution background
CN104742376A (zh) 2015-04-09 2015-07-01 深圳长朗三维科技有限公司 激光线阵列式3d打印设备及其成型方法
US9981312B2 (en) * 2015-05-11 2018-05-29 Wisconsin Alumni Research Foundation Three-dimension printer with mechanically scanned cathode-comb
EP3322577B1 (en) * 2015-07-13 2023-06-07 Stratasys Ltd. Leveling apparatus for a 3d printer
DE102015119747A1 (de) * 2015-11-16 2017-05-18 Cl Schutzrechtsverwaltungs Gmbh Vorrichtung zur generativen Herstellung eines dreidimensionalen Objekts
US11278988B2 (en) * 2015-12-17 2022-03-22 Eos Of North America, Inc. Additive manufacturing method using large and small beam sizes

Also Published As

Publication number Publication date
US20210331392A1 (en) 2021-10-28
EP3426425B1 (de) 2022-06-15
CN107614161A (zh) 2018-01-19
JP2018523755A (ja) 2018-08-23
WO2017153195A1 (de) 2017-09-14
JP6872655B2 (ja) 2021-05-19
EP3426425A1 (de) 2019-01-16
US11052605B2 (en) 2021-07-06
DE102016104180A1 (de) 2017-09-14
US11884006B2 (en) 2024-01-30
JP2020128593A (ja) 2020-08-27
US20190039302A1 (en) 2019-02-07

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