DE602007003114D1 - Verfahren zur Herstellung eines Werkstückes mit Überprüfung des Objektes - Google Patents

Verfahren zur Herstellung eines Werkstückes mit Überprüfung des Objektes

Info

Publication number
DE602007003114D1
DE602007003114D1 DE602007003114T DE602007003114T DE602007003114D1 DE 602007003114 D1 DE602007003114 D1 DE 602007003114D1 DE 602007003114 T DE602007003114 T DE 602007003114T DE 602007003114 T DE602007003114 T DE 602007003114T DE 602007003114 D1 DE602007003114 D1 DE 602007003114D1
Authority
DE
Germany
Prior art keywords
workpiece
inspection
producing
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
Application number
DE602007003114T
Other languages
English (en)
Inventor
Daniel Clark
David Cameron Wright
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rolls Royce PLC filed Critical Rolls Royce PLC
Publication of DE602007003114D1 publication Critical patent/DE602007003114D1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/34Laser welding for purposes other than joining
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20Direct sintering or melting
    • B22F10/25Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00Electron-beam welding or cutting
    • B23K15/0046Welding
    • B23K15/0086Welding welding for purposes other than joining, e.g. built-up welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive 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
    • B29C64/10Processes of additive manufacturing
    • B29C64/141Processes of additive manufacturing using only solid materials
    • B29C64/153Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive 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
    • B29C64/30Auxiliary operations or equipment
    • B29C64/386Data acquisition or data processing for additive manufacturing
    • B29C64/393Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/10Formation of a green body
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30Process control
    • B22F10/36Process control of energy beam parameters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00Apparatus 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
    • B22F12/90Means for process control, e.g. cameras or sensors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00Articles made by soldering, welding or cutting
    • B23K2101/001Turbines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0222Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
    • B23K35/0244Powders, particles or spheres; Preforms made therefrom
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency
DE602007003114T 2006-02-01 2007-01-09 Verfahren zur Herstellung eines Werkstückes mit Überprüfung des Objektes Active DE602007003114D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0601982.2A GB0601982D0 (en) 2006-02-01 2006-02-01 Method and apparatus for examination of objects and structures

Publications (1)

Publication Number Publication Date
DE602007003114D1 true DE602007003114D1 (de) 2009-12-24

Family

ID=36100809

Family Applications (1)

Application Number Title Priority Date Filing Date
DE602007003114T Active DE602007003114D1 (de) 2006-02-01 2007-01-09 Verfahren zur Herstellung eines Werkstückes mit Überprüfung des Objektes

Country Status (4)

Country Link
US (1) US20070176312A1 (de)
EP (1) EP1815936B1 (de)
DE (1) DE602007003114D1 (de)
GB (1) GB0601982D0 (de)

Families Citing this family (69)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007056984A1 (de) * 2007-11-27 2009-05-28 Eos Gmbh Electro Optical Systems Verfahren zum Herstellen eines dreidimensionalen Objekts mittels Lasersintern
GB0804390D0 (en) * 2008-03-10 2008-04-16 Univ Exeter Manufacturing technique
GB0816308D0 (en) 2008-09-05 2008-10-15 Mtt Technologies Ltd Optical module
US8108168B2 (en) * 2009-03-12 2012-01-31 Etegent Technologies, Ltd. Managing non-destructive evaluation data
US8977580B2 (en) * 2010-06-14 2015-03-10 Nippon Steel & Sumitomo Metal Corporation Defect classification apparatus
DE102011008774A1 (de) * 2011-01-18 2012-07-19 Mtu Aero Engines Gmbh Verfahren und Vorrichtung zur Prüfung der generativen Herstellung eines Bauteils
DE102011009624A1 (de) * 2011-01-28 2012-08-02 Mtu Aero Engines Gmbh Verfahren und Vorrichtung zur Prozessüberwachung
DE102011000974A1 (de) 2011-02-28 2012-08-30 Krauss-Maffei Wegmann Gmbh & Co. Kg Fahrzeug, insbesondere militärisches Fahrzeug
DE102011111818A1 (de) 2011-08-27 2013-02-28 Mtu Aero Engines Gmbh Verfahren und Vorrichtung zur generativen Herstellung eines Bauteils
DE102011086889A1 (de) 2011-11-22 2013-05-23 Mtu Aero Engines Gmbh Generatives Herstellen eines Bauteils
DE102012202487A1 (de) * 2012-02-17 2013-08-22 Evonik Industries Ag Verfahren zum Aufschmelzen/Sintern von Pulverpartikeln zur schichtweisen Herstellung von dreidimensionalen Objekten
KR101616856B1 (ko) * 2012-09-05 2016-05-11 아프레시아 파마슈티칼스 컴퍼니 3차원 인쇄 시스템 및 장비 어셈블리
US8888480B2 (en) 2012-09-05 2014-11-18 Aprecia Pharmaceuticals Company Three-dimensional printing system and equipment assembly
WO2014158282A1 (en) 2013-03-13 2014-10-02 Daum Peter E Laser deposition using a protrusion technique
CN105163894B (zh) * 2013-04-26 2018-06-22 联合工艺公司 选择性激光熔融系统
US9651525B2 (en) 2013-06-27 2017-05-16 TecScan Systems Inc. Method and apparatus for scanning an object
DE102013213370A1 (de) * 2013-07-09 2015-01-15 MTU Aero Engines AG Regelung bei generativer Fertigung
DE102013214493A1 (de) * 2013-07-24 2015-01-29 Rolls-Royce Deutschland Ltd & Co Kg Laserauftragsvorrichtung sowie Verfahren zur Erzeugung eines Bauteils mittels direktem Laserauftrag
GB201313840D0 (en) 2013-08-02 2013-09-18 Rolls Royce Plc Method of Manufacturing a Component
DE102013217422A1 (de) 2013-09-02 2015-03-05 Carl Zeiss Industrielle Messtechnik Gmbh Koordinatenmessgerät und Verfahren zur Vermessung und mindestens teilweisen Erzeugung eines Werkstücks
FR3010334B1 (fr) * 2013-09-09 2015-09-25 Michelin & Cie Dispositif de depot de lit de poudre sur une surface muni d'une sonde a reponse electromagnetique, et procede correspondant
GB201316815D0 (en) 2013-09-23 2013-11-06 Renishaw Plc Additive manufacturing apparatus and method
RO130409B1 (ro) * 2013-10-11 2019-04-30 Institutul Naţional De Cercetare-Dezvoltare Pentru Microtehnologie Procedeu de manufacturare rapidă folosind fascicul focalizat de ultrasunete
EP3094967A4 (de) * 2014-01-17 2017-01-25 United Technologies Corporation System zur additiven fertigung mit ultraschallüberprüfung und verfahren zum betrieb
EP3129772A4 (de) 2014-04-10 2017-04-26 United Technologies Corporation Resonanzinspektion in echtzeit für generative fertigung
US10336007B2 (en) * 2014-05-09 2019-07-02 United Technologies Corporation Sensor fusion for powder bed manufacturing process control
CN104400998B (zh) * 2014-05-31 2016-10-05 福州大学 一种基于红外光谱分析的3d打印检测方法
JP6428049B2 (ja) * 2014-08-25 2018-11-28 富士ゼロックス株式会社 積層造形装置及び積層造形プログラム
JP5905060B1 (ja) * 2014-09-16 2016-04-20 株式会社東芝 積層造形装置および積層造形方法
EP3229996A4 (de) * 2014-12-12 2018-09-05 Velo3d Inc. Rückmeldungssteuerungssysteme zum dreidimensionalen drucken
DE102015000100A1 (de) * 2015-01-14 2016-07-14 Cl Schutzrechtsverwaltungs Gmbh Verfahren zur Hestellung von dreidimensionalen Bauteilen
US20160228995A1 (en) * 2015-02-05 2016-08-11 Siemens Energy, Inc. Material repair process using laser and ultrasound
GB201510220D0 (en) 2015-06-11 2015-07-29 Renishaw Plc Additive manufacturing apparatus and method
CA2996041A1 (en) 2015-08-21 2017-03-02 Aprecia Pharmaceuticals LLC Three-dimensional printing system and equipment assembly
US20170059529A1 (en) * 2015-08-24 2017-03-02 Siemens Energy, Inc. Adaptive additive manufacturing process using in-situ laser ultrasonic testing
US10780523B1 (en) 2015-10-05 2020-09-22 Lockheed Martin Corporation Eddy current monitoring in an additive manufacturing continuous welding system
US11358224B2 (en) 2015-11-16 2022-06-14 Renishaw Plc Module for additive manufacturing apparatus and method
US10073060B2 (en) 2015-11-19 2018-09-11 General Electric Company Non-contact acoustic inspection method for additive manufacturing processes
US9989495B2 (en) 2015-11-19 2018-06-05 General Electric Company Acoustic monitoring method for additive manufacturing processes
DE102015224266A1 (de) * 2015-12-04 2017-06-08 Bayerische Motoren Werke Aktiengesellschaft Überwachungsvorrichtung, Fertigungssystem sowie Verfahren zur Überwachung einer Fertigungsstation
GB2546088B (en) * 2016-01-07 2019-05-01 Rolls Royce Plc Cladding a component by laser cladding
DE102016200324A1 (de) * 2016-01-14 2017-07-20 MTU Aero Engines AG Verfahren zum Ermitteln einer Konzentration wenigstens eines Werkstoffs in einem Pulver für ein additives Herstellverfahren
WO2017129294A1 (de) * 2016-01-28 2017-08-03 Siemens Aktiengesellschaft Verfahren zur prüfung eines additiv herzustellenden bauteils und vorrichtung
US20220379381A1 (en) * 2016-02-18 2022-12-01 Velo3D, Inc. Accurate three-dimensional printing
US10675684B2 (en) * 2016-04-29 2020-06-09 Hexcel Corporation Metal AM process with in situ inspection
DE102016110266A1 (de) * 2016-06-02 2017-12-07 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Vorrichtung zur generativen Fertigung von Bauteilen
US11691343B2 (en) 2016-06-29 2023-07-04 Velo3D, Inc. Three-dimensional printing and three-dimensional printers
US20180036964A1 (en) * 2016-08-08 2018-02-08 General Electric Company Method and system for inspection of additive manufactured parts
BE1024495B1 (nl) 2016-09-27 2018-03-13 Materialise N.V. Energiedichtheidskartering in additieve productie-omgevingen
US20180264590A1 (en) * 2017-03-15 2018-09-20 Jentek Sensors, Inc. In situ additive manufacturing process sensing and control including post process ndt
US20180297115A1 (en) * 2017-04-14 2018-10-18 General Electric Company Real Time Detection of Defects during Formation of an Additively Manufactured Component
US10857735B1 (en) * 2017-04-25 2020-12-08 Hrl Laboratories, Llc Apparatus and method for additive manufacturing and determining the development of stress during additive manufacturing
DE102017208092A1 (de) * 2017-05-15 2018-11-15 MTU Aero Engines AG Schichtbauverfahren und Schichtbauvorrichtung zum additiven Herstellen zumindest eines Bauteilbereichs eines Bauteils
US11092943B1 (en) * 2017-06-01 2021-08-17 Cetin Cetinkaya Method, system and device for real-time in-situ additive manufacturing monitoring
FR3069468B1 (fr) 2017-07-28 2022-05-06 Commissariat Energie Atomique Procedes et dispositifs de fabrication et d'inspection ultrasonore en fabrication additive
WO2019092635A1 (en) * 2017-11-09 2019-05-16 Sensima Inspection Sàrl Method and system for manufacturing a component using an additive process
WO2019209301A1 (en) * 2018-04-26 2019-10-31 Hewlett-Packard Development Company, L.P. Printing production quality prediction
EP3590630A1 (de) 2018-07-02 2020-01-08 Renishaw PLC Schallemissionsmessung in der generativen pulverbettfertigung
WO2020100022A1 (en) * 2018-11-14 2020-05-22 Sensima Inspection Sarl System and method for additive manufacturing
EP3654030A1 (de) 2018-11-14 2020-05-20 Hexagon Technology Center GmbH Wirbelstromsensoranordnung und wirbelstromsensorsystem zur generativen fertigung
DE102019112757A1 (de) * 2019-05-15 2020-11-19 Carl Zeiss Ag Verfahren und Vorrichtung zur additiven Herstellung eines Werkstücks
KR102194694B1 (ko) * 2019-12-31 2020-12-24 한국과학기술원 3d 프린팅 공정의 열 화상 및 레이저 초음파 통합 검사 시스템 및 이를 구비한 3d 프린팅 시스템
US10871471B1 (en) * 2020-01-02 2020-12-22 The Boeing Company Systems and methods for inspecting additively manufactured components
WO2021228356A1 (de) 2020-05-11 2021-11-18 Carl Zeiss Industrielle Messtechnik Gmbh Vorrichtung zur additiven herstellung eines werkstücks
CN112548119A (zh) * 2020-12-02 2021-03-26 中国科学院金属研究所 一种基于缺陷形态调控激光选区熔化成形钛合金工艺的方法
DE102020134795A1 (de) 2020-12-23 2022-06-23 Carl Zeiss Ag Verfahren und Vorrichtung zur additiven Herstellung eines Werkstücks
CA3138634C (en) 2021-03-04 2023-09-19 TecScan Systems Inc. System and method for scanning an object using an array of ultrasonic transducers
US20230004142A1 (en) * 2021-07-05 2023-01-05 Cetin Cetinkaya Method, system and device for acquisition and processing of elastic waves and field sensor data for real-time in-situ monitoring of additive manufacturing
US20230249255A1 (en) * 2022-02-04 2023-08-10 Goodrich Corporation Producing ultra-fine-grained materials using additive manufacturing

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5155324A (en) * 1986-10-17 1992-10-13 Deckard Carl R Method for selective laser sintering with layerwise cross-scanning
US6355086B2 (en) * 1997-08-12 2002-03-12 Rolls-Royce Corporation Method and apparatus for making components by direct laser processing
SE521124C2 (sv) * 2000-04-27 2003-09-30 Arcam Ab Anordning samt metod för framställande av en tredimensionell produkt
JP3536807B2 (ja) * 2000-10-25 2004-06-14 日産自動車株式会社 レーザ肉盛り部品の加工方法
SE523394C2 (sv) * 2001-12-13 2004-04-13 Fcubic Ab Anordning och förfarande för upptäckt och kompensering av fel vid skiktvis framställning av en produkt
US6739411B2 (en) * 2002-06-27 2004-05-25 Good Earth Tools, Inc. Hollow auger head assembly
DE60300277T2 (de) * 2002-11-08 2006-01-12 Howmedica Osteonics Corp. Lasererzeugte poröse Oberfläche
DE10310385B4 (de) * 2003-03-07 2006-09-21 Daimlerchrysler Ag Verfahren zur Herstellung von dreidimensionalen Körpern mittels pulverbasierter schichtaufbauender Verfahren
US20050173380A1 (en) * 2004-02-09 2005-08-11 Carbone Frank L. Directed energy net shape method and apparatus

Also Published As

Publication number Publication date
GB0601982D0 (en) 2006-03-15
EP1815936A1 (de) 2007-08-08
US20070176312A1 (en) 2007-08-02
EP1815936B1 (de) 2009-11-11

Similar Documents

Publication Publication Date Title
DE602007003114D1 (de) Verfahren zur Herstellung eines Werkstückes mit Überprüfung des Objektes
DE602007000719D1 (de) Verfahren zur Herstellung eines wabenförmigen Körpers
DE602006021774D1 (de) Verfahren zur herstellung einer rumpfzelle eines flugzeugs
DE502007001128D1 (de) Verfahren zur intelligenten rollierenden beschickung eines gargerätes und gargerät hierzu
DE602007012785D1 (de) Verfahren zur Herstellung einer Photomaske
DE502007002942D1 (de) Verfahren zur herstellung eines einteiligen kolbens
ATE531895T1 (de) Zusammensetzung und verfahren zur herstellung eines stützmittels
DE602007006718D1 (de) Vorrichtung und Verfahren zur Herstellung einer lichtemittierenden Einheit
AT505197A3 (de) Verfahren zur aktivierung eines photosensibilisators
ATE477084T1 (de) Verfahren zur herstellung eines strukturierten schleifkörpers
DE502007006736D1 (de) Verfahren zur automatischen Modifikation eines Programms
DE112010004178T8 (de) Piezoelektrisches Bauelement und Verfahren zur Herstellung eines piezoelektrischen Bauelements
DE602007007528D1 (de) Verfahren zur Herstellung eines Tonerbehälters
ATE540161T2 (de) Verfahren zur herstellung eines papierprodukts
ATE476430T1 (de) Verfahren zur herstellung eines benzimidazol- derivats
DE502008002169D1 (de) Verfahren zur herstellung eines bewegungssensors
DE112006003449A5 (de) Verfahren zur Beschichtung eines Bauteils
ATE483052T1 (de) Verfahren und vorrichtung zur herstellung eines spinnvlieses
DE502007005615D1 (de) Verfahren zur herstellung eines piezoaktors
DE602007012868D1 (de) Verfahren zur erhaltung eines konstanten schleifprozesses
DE502006002555D1 (de) Verfahren zur Zustandserfassung eines Stromabnehmers
DE602006010701D1 (de) Verfahren zur herstellung eines mit flansch versehenen artikels
ATE529263T1 (de) Verfahren zur herstellung eines trägers und träger
DE102005061920B4 (de) Verfahren zur Erzeugung eines Schrumpfsitzes
DE602007008875D1 (de) Verfahren zur herstellung eines verwendungsfertigen desinfektionsmittels

Legal Events

Date Code Title Description
8364 No opposition during term of opposition