EP1901875A1 - Outil de soudage par friction-malaxage, et procede et dispositif pour commander un processus de soudage par friction-malaxage en temps reel, par detection des forces acceleratrices et/ou des oscillations au niveau du corps de l'outil - Google Patents

Outil de soudage par friction-malaxage, et procede et dispositif pour commander un processus de soudage par friction-malaxage en temps reel, par detection des forces acceleratrices et/ou des oscillations au niveau du corps de l'outil

Info

Publication number
EP1901875A1
EP1901875A1 EP06764007A EP06764007A EP1901875A1 EP 1901875 A1 EP1901875 A1 EP 1901875A1 EP 06764007 A EP06764007 A EP 06764007A EP 06764007 A EP06764007 A EP 06764007A EP 1901875 A1 EP1901875 A1 EP 1901875A1
Authority
EP
European Patent Office
Prior art keywords
friction stir
stir welding
welding tool
tool
friction
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.)
Withdrawn
Application number
EP06764007A
Other languages
German (de)
English (en)
Inventor
Jean Pierre Bergmann
Johannes Wilden
Frank BARTHELMÄ
Bernd Aschenbach
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.)
Technische Universitaet Ilmenau
Original Assignee
Technische Universitaet Ilmenau
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 Technische Universitaet Ilmenau filed Critical Technische Universitaet Ilmenau
Publication of EP1901875A1 publication Critical patent/EP1901875A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/123—Controlling or monitoring the welding process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
    • B23K20/1255—Tools therefor, e.g. characterised by the shape of the probe

Definitions

  • the invention relates to a friction stir welding tool and a method and an arrangement for real-time control of a friction stir welding process.
  • Friction welding has been used industrially for a number of decades for a variety of joining tasks in which rotationally symmetric or flat workpieces are joined.
  • the heat is generated by friction of the joining surfaces, which is generated by the relative movement of the joining partners to each other.
  • Friction Stir Welding is a further development of friction welding technology and was patented in the early 1990s (GB 2 270 864). This method is due to the low joining ⁇ temperatures and the excellent property profile of the compounds of.
  • both the frictional heat and the pressure are generated by wear-resistant tool stir bolts. These consist of a shoulder and a pin and are pressed in rotation in the joining area in the workpiece material until the shoulder is in contact with the workpiece surface ⁇ piece. The friction between the workpiece material and the shoulder produces the required heat for plasticizing the workpiece material.
  • the plasticized material is stirred by the pin inside the seam and transported to its rear side.
  • It is therefore an object of the present invention to provide a compact, universally applicable friction stir welding tool as well as a method and an arrangement for real-time control provide a Rillonreibsch resumereas with which it is possible the joining process mieren easy and inexpensive to opti ⁇ so that in its result, the quality requirements ⁇ stakes corresponding joint seam without the need for post-processing occurs and the load on the friction stir welding mini ⁇ mized is.
  • Fig. 1 - representation of the velocity field during a friction stir welding process
  • FIG. 2 - schematic representation of a friction stir welding tool according to the invention
  • FIG. 3 schematic representation of a control loop for the friction stir welding process
  • Fig. 1 illustrates the components of a speed ⁇ field, as occurs in an ordinary Rhakreibsch resume polish.
  • FIG. 2 schematically shows a friction stir welding tool according to the invention, which is attached to a non-illustrated
  • Known friction stir welding Tools consist essentially of a tool body 2 made of tempered tool steel and a horrendbolzen 3, the latter being composed of a shoulder and a pin, which are firmly connected together.
  • the attachment of the istrandbolzens 3 on the tool base body 2 ⁇ takes place in a tool holder, for example a collet or chuck for parallel according to DIN 1835 part 1 and 2.
  • FIG. 1 A tool holder, for example a collet or chuck for parallel according to DIN 1835 part 1 and 2.
  • the heat generated in the friction stir welding process is dissipated via a closed cooling system 4.
  • the coolant is supplied to the tool via the inner coolant supply (IKZ) 5 of the machine spindle and via a radially rotatably mounted on the outer circumference of the tool coolant ring 6 derived.
  • IKZ inner coolant supply
  • the supply and discharge can be carried out via a modified coolant ring.
  • a correspondingly designed sensor arrangement 7 enables the detection of selected, process-related irregularities which are essentially due to changes in the material flow or in the friction behavior at the interface pin / substrate surface.
  • This Unre ⁇ larities, which originally result from a change in the rotational speed, the acceleration occurring in the tool can be determined by the measurement.
  • the acceleration can be multiaxial, for example, by means of a commercially available triaxial acceleration sensor based on piezos be measured. After further processing and evaluation of these measured values, it is then possible to make a statement about the vibrations occurring and loads on the machine.
  • the solution presented here offers the unique possibility of actively gaining information about the self-adjusting material flow in the case of non-similar material pairings (eg steel / aluminum, titanium / aluminum, etc.).
  • the different flow properties of the materials used lead to an untypical velocity field, which can only be defined by measuring the resulting velocity changes (accelerations).
  • the compact design according to the invention and the intelligent arrangement of the sensors in the friction stir welding head represent an essential feature of the invention, since thus the user can be offered a holistic, real-time process control "in one hand”.
  • the energy for the tool-internal electronics is inductively fed via a coupling point 9.
  • a stator 10 has the shape of a ⁇ preferably Kreisringaus section.
  • Fig. 3 the control circuit of a fiction, ⁇ friction stir welding system is shown schematically.
  • the respective sensor signals via a data pre-processing and a bidirectional telemetry unit are transmitted ⁇ unit to an evaluation .
  • the data is prepared and commands for controlling the action logic in the welding system are generated.
  • the generated commands for system control are transmitted via suitable interfaces, which in turn transmit the relevant process parameters, such as processing speed. speed, processing power and working temperature. This ensures that the process parameters are adapted to the changing process conditions during the welding process and that the welding process can be carried out in a quality-oriented manner.
  • the compact design of the friction stir welding tool according to the invention which is compatible with various welding systems or machining centers, proves to be very advantageous since it can be used universally and, in particular, offers small companies the possibility of reacting very flexibly to corresponding market requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

L'invention concerne un outil de soudage par friction-malaxage, ainsi qu'un procédé et un dispositif pour commander un processus de soudage par friction-malaxage en temps réel. L'objectif de cette invention est de concevoir un outil de soudage par friction-malaxage qui soit compact et utilisable de manière universelle, ainsi qu'un procédé et un dispositif pour commander un processus de soudage par friction-malaxage en temps réel, de manière à obtenir un cordon de soudure de qualité, sans nécessairement effectuer un traitement ultérieur, et de façon à réduire au maximum les sollicitations exercées sur l'installation de soudage par friction-malaxage. A cet effet, le procédé selon l'invention consiste à détecter les oscillations d'un outil de soudage par friction-malaxage dans la direction des x, des y, et des z, les forces de traitement appliquées par l'outil de soudage par friction-malaxage, ainsi que les températures de travail générées directement au niveau du point de soudure, pendant le processus de soudage par friction-malaxage, au moyen de capteurs adaptés (7) dans le corps de base de l'outil (1) ; à transmettre télémétriquement les données détectées, par l'intermédiaire d'une unité (8), à une unité d'évaluation qui prépare ces données de manière assistée par ordinateur, et ; à réguler les paramètres de processus vitesse de traitement, force de traitement, et température de travail, par l'intermédiaire d'une unité de commande.
EP06764007A 2005-07-09 2006-06-30 Outil de soudage par friction-malaxage, et procede et dispositif pour commander un processus de soudage par friction-malaxage en temps reel, par detection des forces acceleratrices et/ou des oscillations au niveau du corps de l'outil Withdrawn EP1901875A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510032170 DE102005032170A1 (de) 2005-07-09 2005-07-09 Rührreibschweißwerkzeug und Verfahren und Anordnung zur online-Kontrolle eines Rührreibschweißprozesses
PCT/EP2006/063758 WO2007006669A1 (fr) 2005-07-09 2006-06-30 Outil de soudage par friction-malaxage, et procede et dispositif pour commander un processus de soudage par friction-malaxage en temps reel, par detection des forces acceleratrices et/ou des oscillations au niveau du corps de l'outil

Publications (1)

Publication Number Publication Date
EP1901875A1 true EP1901875A1 (fr) 2008-03-26

Family

ID=37057142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06764007A Withdrawn EP1901875A1 (fr) 2005-07-09 2006-06-30 Outil de soudage par friction-malaxage, et procede et dispositif pour commander un processus de soudage par friction-malaxage en temps reel, par detection des forces acceleratrices et/ou des oscillations au niveau du corps de l'outil

Country Status (3)

Country Link
EP (1) EP1901875A1 (fr)
DE (1) DE102005032170A1 (fr)
WO (1) WO2007006669A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113245687A (zh) * 2021-06-21 2021-08-13 宁波齐云新材料技术有限公司 一种转速智能控制的摩擦搅拌焊接系统

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7992761B2 (en) * 2006-10-05 2011-08-09 The Boeing Company Process control system for friction stir welding
US20090255980A1 (en) * 2008-04-15 2009-10-15 Lockheed Martin Corporation Control systems for friction stir welding of titanium alloys and other high temperature materials
JP5607049B2 (ja) * 2008-08-11 2014-10-15 メガスター・テクノロジーズ・エルエルシー 上昇した温度の工具材料を多重カラー組立体を介して把持するための回転保持装置
DE102009060138B4 (de) 2009-12-23 2013-08-29 Hochschule Magdeburg-Stendal (Fh) Anordnung zum Reibschweißen kleiner Querschnittsflächen
GB201002717D0 (en) 2010-02-18 2010-04-07 Rolls Royce Plc An apparatus and a method of determining the quality of a friction weld
US8657179B1 (en) 2012-03-26 2014-02-25 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Weld nugget temperature control in thermal stir welding
DE202012005397U1 (de) 2012-05-31 2012-06-21 Grenzebach Maschinenbau Gmbh Vorrichtung zur Verbesserung der Qualität der Schweißnaht beim Rührreibschweißen
DE102012010836B3 (de) 2012-05-31 2013-06-20 Grenzebach Maschinenbau Gmbh Verfahren und Vorrichtung zur Verbesserung der Qualität der Schweißnaht beim Rührreibschweißen, Computerprogramm sowie maschinenlesbarer Träger
DE202012103219U1 (de) 2012-08-24 2013-12-02 Kuka Systems Gmbh Pressschweißvorrichtung
US8556156B1 (en) * 2012-08-30 2013-10-15 Apple Inc. Dynamic adjustment of friction stir welding process parameters based on weld temperature
DE102014001050A1 (de) 2014-01-28 2015-07-30 Grenzebach Maschinenbau Gmbh Verfahren und Vorrichtung zum Rührreibschweißen bei Materialien unterschiedlicher Dicke und bei Kehlnähten
DE202014000747U1 (de) 2014-01-28 2014-02-18 Grenzebach Maschinenbau Gmbh Vorrichtung zum Rührreibschweißen bei Materialien unterschiedlicher Dicke und bei Kehlnähten
DE102014004331B3 (de) * 2014-03-26 2015-06-11 Grenzebach Maschinenbau Gmbh Verfahren und Vorrichtung zur Erhöhung der Qualität der Schweißnaht beim Rührreibschweißen sowie Computerprogramm und maschinenlesbarer Träger mit einem Programmcode zur Durchführung des Verfahrens
DE202014002642U1 (de) 2014-03-26 2014-04-10 Grenzebach Maschinenbau Gmbh Vorrichtung zur Erhöhung der Festigkeit der Schweißnaht beim Rührreibschweißen
EP2965858A1 (fr) 2014-07-11 2016-01-13 NELA Razvojni center d.o.o. Podruznica Vincarje Détection de rupture d'outil en temps réel pendant le processus de soudage par friction-malaxage
EP2965851A1 (fr) 2014-07-11 2016-01-13 NELA Razvojni center d.o.o. Podruznica Vincarje Procédé de soudage par friction-malaxage avec détection de rupture d'outil hors ligne
CN104259650B (zh) * 2014-07-31 2017-07-04 上海拓璞数控科技股份有限公司 一种搅拌摩擦焊接压力控制系统
EP3243597B1 (fr) * 2015-01-07 2019-07-17 Yamamoto Metal Technos Co. Ltd. Dispositif de soudage par friction-malaxage, et outil rotatif utilisé pour le soudage par friction-malaxage
DE102015010638A1 (de) 2015-08-13 2017-02-16 Grenzebach Maschinenbau Gmbh Vorrichtung und Verfahren zum homogenen Verschweißen flächig gebogener Strukturen durch Rührreibschweißen
EP3366410A4 (fr) * 2015-10-21 2019-09-04 Kawasaki Jukogyo Kabushiki Kaisha Dispositif et procédé de soudage par point avec friction et agitation
JP6143915B1 (ja) * 2016-04-28 2017-06-07 株式会社日立パワーソリューションズ 摩擦攪拌接合装置
DE102016217025A1 (de) 2016-09-07 2018-03-08 Airbus Defence and Space GmbH Verfahren zum betrieb einer rührreibschweiss-vorrichtung, rührreibschweiss-vorrichtung und rührreibschweiss-system
DE102016221112B4 (de) 2016-10-26 2018-12-20 Airbus Defence and Space GmbH Schweißwerkzeug und Rührreibschweißverfahren zum Verbinden wenigstens zweier Werkstücke mit einem Schweißwerkzeug
DE102016221110B4 (de) 2016-10-26 2018-10-25 Airbus Defence and Space GmbH Schweißwerkzeug und Rührreibschweißverfahren zum Verbinden wenigstens zweier Werkstücke mittels eines Schweißwerkzeugs
CN106891089B (zh) * 2017-03-27 2022-06-03 宁波海天精工股份有限公司 一种多用主轴结构
DK3450081T3 (da) 2017-08-30 2023-12-18 Mazak Corp Friktionssvejseværktøj, friktionssvejsesy stem og anvendelse deraf
DE102018001774B4 (de) 2018-03-06 2020-01-23 Grenzebach Maschinenbau Gmbh Vorrichtung und Verfahren zur Vermeidung einer Unterbrechung des Schweiß - Prozesses beim Rührreibschweißen, insbesondere eines Bruchs des Reibstifts.
CN112238289A (zh) * 2019-07-16 2021-01-19 中国科学院沈阳自动化研究所 一种搅拌摩擦焊机器人温度无线采集系统
AT523465B1 (de) 2020-02-06 2022-04-15 Fill Gmbh Rührreibschweißwerkzeughalter
CN111250862B (zh) * 2020-03-23 2023-11-17 吉林大学 一种搅拌摩擦焊夹具及温度场反馈控制方法
CN111375885B (zh) * 2020-04-29 2021-11-05 桂林航天工业学院 一种2219铝合金板材用的摩擦搅拌焊接装置
CN112345726B (zh) * 2020-10-23 2022-11-18 安阳工学院 一种对搅拌摩擦焊焊缝质量的评价方法
CN113369810A (zh) * 2021-05-31 2021-09-10 张家港沙钢金洲管道有限公司 一种基于搅拌摩擦焊的铝基复合材料管的制备方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4782452A (en) * 1986-08-25 1988-11-01 General Electric Company Acoustic detection of milling tool touch to a workpiece
US4918427A (en) * 1989-03-27 1990-04-17 General Electric Company Multi-level tool break detection using multi-mode sensing
US6199745B1 (en) * 1998-07-09 2001-03-13 Mts Systems Corporation Welding head
US6497355B1 (en) * 1999-10-13 2002-12-24 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration System for controlling the stirring pin of a friction stir welding apparatus
DE10139687C1 (de) * 2001-08-11 2003-02-20 Eads Deutschland Gmbh Reibrührwerkzeug zum Reibschweißen
SE0200303D0 (sv) * 2002-02-01 2002-02-01 Esab Ab Svetshuvud för friktionsomrörningssvetsning
DE102004030381B3 (de) * 2004-06-23 2006-01-12 Eads Deutschland Gmbh Verfahren zur Online-Qualitätsprüfung beim Reibrührschweißen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007006669A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113245687A (zh) * 2021-06-21 2021-08-13 宁波齐云新材料技术有限公司 一种转速智能控制的摩擦搅拌焊接系统
CN113245687B (zh) * 2021-06-21 2021-11-02 宁波齐云新材料技术有限公司 一种转速智能控制的摩擦搅拌焊接系统

Also Published As

Publication number Publication date
WO2007006669A1 (fr) 2007-01-18
DE102005032170A1 (de) 2007-01-11

Similar Documents

Publication Publication Date Title
EP1901875A1 (fr) Outil de soudage par friction-malaxage, et procede et dispositif pour commander un processus de soudage par friction-malaxage en temps reel, par detection des forces acceleratrices et/ou des oscillations au niveau du corps de l'outil
EP3166746B1 (fr) Procédé et dispositif de changement rapide et fiable d'outil lors d'une procédure de soudage par friction-malaxage
EP1262280B1 (fr) Dispositif de galetage pour écrouissage des paliers des vilebrequins
DE102014001050A1 (de) Verfahren und Vorrichtung zum Rührreibschweißen bei Materialien unterschiedlicher Dicke und bei Kehlnähten
WO2018011243A1 (fr) Procédé permettant de définir des paramètres de soudage pour un processus de soudage
WO2017025078A1 (fr) Dispositif et procédé de soudage homogène de structures cintrées à plat par soudage par friction-malaxage
DE102007048961A1 (de) Verfahren zur Bearbeitung eines Werkstücks mit einer Werkzeugmaschine
DE202014005571U1 (de) Vorrichtung zum schnellen und sicheren Werkzeugwechsel bei dem Vorgang des Rührreibschweißens
EP2813314B1 (fr) Outil et procédé de friction-malaxage pour une pièce comprenant un revêtement
DE202018006651U1 (de) Sensormodul, Maschinen- oder Werkzeugelement und Werkzeugmaschine
WO2012048883A1 (fr) Machine-outil à capteur ultrasonore
DE202015005763U1 (de) Vorrichtung zum homogenen Verschweißen flächig gebogener Strukturen durch Rührreibschweißen
DE202014000747U1 (de) Vorrichtung zum Rührreibschweißen bei Materialien unterschiedlicher Dicke und bei Kehlnähten
EP2564969B1 (fr) Procédé de soudage par friction-malaxage pour la liaison de pièces usinées en forme de plaques
EP3589459B1 (fr) Robot à bras articulé et procédé d'usinage par enlèvement de copeaux d'une pièce au moyen du robot à bras articulé
WO2020172696A1 (fr) Procédé d'assemblage ou d'enlèvement de copeaux, et dispositif associé
DE102015101524A1 (de) Kraftmessung und -regelung bei US-basierenden Prozessen
WO2019210895A1 (fr) Détection d'une contrainte d'une pièce usinée sur la base d'une simulation
DE102016005850B4 (de) Verfahren und Vorrichtung zum Fügen wenigstens zweier Bauteile, insbesondere für ein Kraftfahrzeug
DE102016109970B4 (de) Verfahren zum Rührreibschweißen von metallischen Werkstücken
DE102016002933A1 (de) Verfahren zum Regeln eines Roboters und Roboter
DE102010019677A1 (de) Verfahren und Vorrichtung zur Konditionierung von Lagersystemen für Wellen
WO2019052722A1 (fr) Module de finition pour machine-outil et procédé d'usinage
DE202016102872U1 (de) Werkzeugmaschine zum Rührreibschweißen von metallischen Werkstücken
DE102016206036A1 (de) Verfahren zum Durchführen eines Schweißprozesses von an einem Schweißpunkt miteinander zu verschweißenden Werkstücken

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20080110

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20080704

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20100220