US20130130602A1 - Device For Insertion, Guidance And Evacuation Of Cylindrical Parts Such As Nuclear Fuel Pellets, In A Centreless Grinder - Google Patents

Device For Insertion, Guidance And Evacuation Of Cylindrical Parts Such As Nuclear Fuel Pellets, In A Centreless Grinder Download PDF

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Publication number
US20130130602A1
US20130130602A1 US13/812,861 US201113812861A US2013130602A1 US 20130130602 A1 US20130130602 A1 US 20130130602A1 US 201113812861 A US201113812861 A US 201113812861A US 2013130602 A1 US2013130602 A1 US 2013130602A1
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US
United States
Prior art keywords
guide
chute
screw
exit
entry
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.)
Abandoned
Application number
US13/812,861
Other languages
English (en)
Inventor
Serge Fantini
Herve Medina
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.)
Orano Cycle SA
Original Assignee
Areva NC SA
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 Areva NC SA filed Critical Areva NC SA
Assigned to AREVA NC reassignment AREVA NC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FANTINI, SERGE, MEDINA, HERVE
Publication of US20130130602A1 publication Critical patent/US20130130602A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B24B5/22—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work for grinding cylindrical surfaces, e.g. on bolts
    • B24B5/225—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work for grinding cylindrical surfaces, e.g. on bolts for mass articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/005—Feeding or manipulating devices specially adapted to grinding machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B24B5/22—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work for grinding cylindrical surfaces, e.g. on bolts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/313—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving work-supporting means carrying several workpieces to be operated on in succession
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/35—Accessories
    • B24B5/355—Feeding means
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C21/00—Apparatus or processes specially adapted to the manufacture of reactors or parts thereof
    • G21C21/02—Manufacture of fuel elements or breeder elements contained in non-active casings
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Definitions

  • the invention relates to a device for the insertion, guidance and evacuation of cylindrical parts such as nuclear fuel pellets in a centreless grinder.
  • the main application is grinding of nuclear fuel pellets for which quality is strict and imposes requirements to avoid generating defects on the pellets.
  • Centreless grinding is a known advantageous grinding process for grinding cylindrical parts, particularly for nuclear fuel pellets.
  • a centreless grinder usually includes two grinding wheels, one of which is a drive wheel used to rotate the pellets on themselves and making them advance on a guide rail called the guide chute in the case of nuclear fuel pellets, and the other is a grinding wheel with the function of grinding the pellet diameters by abrasion.
  • the quality of ground nuclear fuel pellets depends on the efficiency of the centreless grinder itself, but also on the quality of the pellet transfer immediately on the entry side into the centreless grinder, in it, and immediately on the exit side from it, in other words the quality of insertion of pellets into the guide chute, of their guidance in the guide chute between the grinding wheel and the drive wheel and of their evacuation from the drive wheel when they have been ground.
  • One particular purpose is to propose a solution that is easy to use in a glove box environment.
  • exit guide arranged at the other longitudinal end of the guide chute and adapted to transfer parts from the chute to a conveyor system on the exit side from the centreless grinder
  • the guide chute is a single piece steel part on which surface and in-core annealing and quenching heat treatments have been made. These treatments may preferably be completed by surface treatments once the part (guide chute) has been finished, to increase some characteristics such as a better coefficient of friction and greater resistance to wear.
  • This steel is preferably an XC 38 steel.
  • tungsten carbide plate has a very good resistance to wear.
  • the major disadvantage is its brittleness under shocks and internal stresses in the steel base.
  • the disadvantages of guide chutes according to the state of the art are avoided by making a single-piece steel chute with in-core and surface heat treatments providing wear resistance equivalent to tungsten carbide and good resistance to shocks and the relaxation of internal stresses in the chute.
  • the pitch of the second screw is smaller than but sufficiently close to the pitch of the first screw to create a micrometric adjustment of the pivoting strips, so as to obtain the greatest possible precision.
  • the device advantageously comprises a spring adapted to compensate for functional clearances of the device by guaranteeing permanent bearing between the second screw and the pivoting strip.
  • the device 1 includes firstly a guide chute 2 adapted to guide pellets over the length of the grinding wheel 8 and drive wheel (not shown) of a centreless grinder 10 shown in FIG. 3 .
  • the guide chute 2 is a single piece part made of XC 38 steel on which surface and in-core quenching and annealing heat treatments have been performed. The heat treatments were done to give the guide chute wear resistance equivalent to tungsten carbide, good shock resistance and so that the chute 2 has no internal stresses.
  • This chute 2 comprises an upper part 20 , the function of which is to guide the pellets P of nuclear fuel. As can be better seen in FIGS. 3A and 3B , the guide part 20 is inclined and is delimited by two longitudinal edges 200 , 201 .
  • the strip 51 is installed free to pivot on an axis 510 provided with a polymer bearing installed in a support 52 arranged as a turret.
  • Mechanical means 6 are provided to adjust the alignment of the pivoting strip 51 relative to the edge 201 of the chute. These means are composed of two screws 60 , 61 nested in each other in the upper part of the turret 52 ( FIG. 3B ).
  • the first screw 60 is screwed into the support 52 .
  • the second screw 61 has a smaller pitch but similar to the pitch of the screw 60 and the screw 61 is fixed in rotation. Rotation of the screw 60 causes translation along its axis relative to the fixed support 52 (screw-nut connection). At the same time, this rotation of the screw 60 causes a second translation along its axis relative to the second screw 61 .
  • a spring 62 for compensation of functional clearances of the device is installed between the pivoting strip 51 and the support 52 ; it can thus provide a permanent bearing between the screw 61 and the strip 51 in the pivoted position.
  • the geometric shape and length of the outlet guide 5 are adapted to limit the number of ground pellets in the buffer and their exit speed. This prevents said pellets P from tipping on the conveyor system at the exit from the centreless grinder 10 .
  • the device 1 according to the invention 1 forms a single piece assembly to which pivoting handles 70 , 71 are fixed, adapted to enable the insertion into and withdrawal from a centreless grinder 10 . This facilitates maintenance operations that are difficult in a glove box environment.
  • the assembly 1 is single piece because:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
US13/812,861 2010-07-27 2011-07-25 Device For Insertion, Guidance And Evacuation Of Cylindrical Parts Such As Nuclear Fuel Pellets, In A Centreless Grinder Abandoned US20130130602A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR1056138A FR2963265B1 (fr) 2010-07-27 2010-07-27 Dispositif pour l'introduction, le guidage et l'evacuation de pieces cylindriques, telles que des pastilles de combustible nucleaire, dans une rectifieuse sans centre
FR1056138 2010-07-27
PCT/EP2011/062748 WO2012013634A1 (fr) 2010-07-27 2011-07-25 Dispositif pour l'introduction, le guidage et l'evacuation de pièces cylindriques, telles que des pastilles de combustible nucleaire, dans une rectifieuse sans centre

Publications (1)

Publication Number Publication Date
US20130130602A1 true US20130130602A1 (en) 2013-05-23

Family

ID=43828228

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/812,861 Abandoned US20130130602A1 (en) 2010-07-27 2011-07-25 Device For Insertion, Guidance And Evacuation Of Cylindrical Parts Such As Nuclear Fuel Pellets, In A Centreless Grinder

Country Status (7)

Country Link
US (1) US20130130602A1 (ja)
EP (1) EP2598284B1 (ja)
JP (1) JP5966239B2 (ja)
CN (1) CN103118835B (ja)
FR (1) FR2963265B1 (ja)
RU (1) RU2578330C2 (ja)
WO (1) WO2012013634A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9022836B2 (en) 2010-07-27 2015-05-05 Areva Nc Dressing device for a grinding wheel and its use in a centreless nuclear fuel pellet grinder
EA029066B1 (ru) * 2014-12-18 2018-02-28 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Омский государственный технический университет" Люнет шлифовального станка

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167081A (en) * 1977-07-07 1979-09-11 Westinghouse Electric Corp. Centerless grinder
US4173929A (en) * 1977-11-29 1979-11-13 Documation Incorporated Printer ribbon anti-fold mechanism
US4434583A (en) * 1981-07-06 1984-03-06 Burgess Jr Warren C Automatically adjustable workpiece guide and feed mechanism
US4700936A (en) * 1986-08-26 1987-10-20 Lamb Technicon Corp. Clamp mechanism
US5309801A (en) * 1992-04-21 1994-05-10 Markle Kenneth E Micro-adjustable case neck turning tool
US20020193057A1 (en) * 2001-06-05 2002-12-19 Compagnie Generale Des Matieres Nucleaires Method and apparatus for rectifying cylindrical articles, in particular nuclear fuel pellets
US7223038B2 (en) * 2004-07-06 2007-05-29 Billy Star Holding Ltd Spreading apparatus for flowable materials

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FR1595262A (ja) * 1968-03-16 1970-06-08
DE3116140A1 (de) * 1981-04-23 1982-11-11 Batal GmbH, 8560 Lauf Verfahren zum parallelen ausrichten der vorderen undhinteren regelscheibenseitigen werkstueckfuehrung
FI71250C (fi) * 1984-06-20 1986-12-19 Rauma Repola Oy Dammavsugningsanordning foer slipmaskin
JPH0413075Y2 (ja) * 1987-11-18 1992-03-27
JPH0319756A (ja) * 1989-06-15 1991-01-28 Toshin Seiki Kk 心なし研削盤のワークガイド装置
JPH0798300B2 (ja) * 1989-09-27 1995-10-25 光洋機械工業株式会社 心なし研削盤のワークガイド装置
GB9721511D0 (en) * 1997-10-11 1997-12-10 British Nuclear Fuels Plc Apparatus for machining workpieces
JP3471273B2 (ja) * 2000-01-27 2003-12-02 核燃料サイクル開発機構 乾式研削機用研削粉末回収装置
DE502007000453D1 (de) * 2006-03-14 2009-04-09 Wenger Automation & Engineerin Hoch-Geschwindigkeits-Lader
UA20238U (en) * 2006-07-14 2007-01-15 Oinst Of Ex And Veterinary Med Strain salmonella enteritidis no. 34 for production immune-biological preparations
JP2009006438A (ja) * 2007-06-27 2009-01-15 Kyocera Corp センタレス研削盤用支持部材
RU73264U1 (ru) * 2007-12-03 2008-05-20 Чп "Ремсервис" Устройство для наружного шлифования цилиндрических деталей
CN201172176Y (zh) * 2008-03-17 2008-12-31 李忠 一种带有回收加工废料装置的无心磨床
CN201214200Y (zh) * 2008-07-14 2009-04-01 新昌县方圆轴承科技创新服务中心 轴承套圈无心磨床自动下料机
JP5257065B2 (ja) * 2008-12-26 2013-08-07 日本精工株式会社 被加工物支持体および機械加工装置
RU84765U1 (ru) * 2009-03-20 2009-07-20 Сергей Геннадьевич Бишутин Устройство для шлифования наружных протяженных цилиндрических поверхностей нежестких заготовок
CN201579658U (zh) * 2010-01-07 2010-09-15 马勒三环气门驱动(湖北)有限公司 无心磨床自动进给装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167081A (en) * 1977-07-07 1979-09-11 Westinghouse Electric Corp. Centerless grinder
US4173929A (en) * 1977-11-29 1979-11-13 Documation Incorporated Printer ribbon anti-fold mechanism
US4434583A (en) * 1981-07-06 1984-03-06 Burgess Jr Warren C Automatically adjustable workpiece guide and feed mechanism
US4700936A (en) * 1986-08-26 1987-10-20 Lamb Technicon Corp. Clamp mechanism
US5309801A (en) * 1992-04-21 1994-05-10 Markle Kenneth E Micro-adjustable case neck turning tool
US20020193057A1 (en) * 2001-06-05 2002-12-19 Compagnie Generale Des Matieres Nucleaires Method and apparatus for rectifying cylindrical articles, in particular nuclear fuel pellets
US7223038B2 (en) * 2004-07-06 2007-05-29 Billy Star Holding Ltd Spreading apparatus for flowable materials

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9022836B2 (en) 2010-07-27 2015-05-05 Areva Nc Dressing device for a grinding wheel and its use in a centreless nuclear fuel pellet grinder
EA029066B1 (ru) * 2014-12-18 2018-02-28 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Омский государственный технический университет" Люнет шлифовального станка

Also Published As

Publication number Publication date
EP2598284A1 (fr) 2013-06-05
WO2012013634A1 (fr) 2012-02-02
CN103118835B (zh) 2016-02-10
RU2578330C2 (ru) 2016-03-27
FR2963265A1 (fr) 2012-02-03
FR2963265B1 (fr) 2013-04-12
EP2598284B1 (fr) 2014-04-30
RU2013108446A (ru) 2014-09-10
JP5966239B2 (ja) 2016-08-10
CN103118835A (zh) 2013-05-22
JP2013532586A (ja) 2013-08-19

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AS Assignment

Owner name: AREVA NC, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FANTINI, SERGE;MEDINA, HERVE;REEL/FRAME:029853/0535

Effective date: 20130115

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION