【BS英国标准】BSEN13743-2002Safetyrequirementsforcoatedabrasives.doc

licensed copy: institute of technology tallaght, institute of technology, sun nov 18 04:49:01 gmt+00:00 2007, uncontrolled copy, (c) bsibritish standardbs en13743:2002the european standard en 13743:2001 has the status of abritish standardics 25.100.70no copying without bsi permission except as permitted by copyright lawbs en 13743:2002national forewordthis british standard is the official english language version ofen 13743:2001.the uk participation in its preparation was entrusted to technical committee mte/13, grinding wheels, abrasive tools, paper and cloths, and powders, which has the responsibility to:aid enquirers to understand the text;present to the responsible european committee any enquiries on the interpretation, or proposals for change, and keep the uk interests informed;monitor related international and european developments and promulgate them in the uk.a list of organizations represented on this committee can be obtained on request to its secretary.cross-referencesthe british standards which implement international or european publications referred to in this document may be found in the bsi standards catalogue under the section entitled “international standards correspondence index”, or by using the “find” facility of the bsi standards electronic catalogue.a british standard does not purport to include all the necessary provisions of a contract. users of british standards are responsible for their correct application.compliance with a british standard does not of itself confer immunity from legal obligations.licensed copy: institute of technology tallaght, institute of technology, sun nov 18 04:49:01 gmt+00:00 2007, uncontrolled copy, (c) bsithis british standard, having been prepared under the direction of the engineering sector policy and strategy committee, was published under the authority of the standards policy and strategy committee on 18 january 2002 bsi 18 january 2002isbn 0 580 38876 xsummary of pagesthis document comprises a front cover, an inside front cover, the en title page,pages 2 to 18, an inside back cover and a back cover.the bsi copyright date displayed in this document indicates when the document was last issued.amd. no.datecommentsamendments issued since publicationeuropean standard norme europenneeuropische normen 13743december 2001ics 25.080.50; 25.100.70english versionsafety requirements for coated abrasivesprescriptions de scurit pour les produits abrasifs appliqussicherheitsanforderungen fr schleifmittel auf unterlagenthis european standard was approved by cen on 26 october 2001.cen members are bound to comply with the cen/cenelec internal regulations which stipulate the conditions for giving this european standard the status of a national standard without any alteration. up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the management centre or to any cen member.this european standard exists in three official versions (english, french, german). a version in any other language made by translation under the responsibility of a cen member into its own language and notified to the management centre has the same status as the official versions.cen members are the national standards bodies of austria, belgium, czech republic, denmark, finland, france, germany, greece, iceland, ireland, italy, luxembourg, netherlands, norway, portugal, spain, sweden, switzerland and united kingdom.european committee for standardization c o m i t eur o p en de nor m a l i s a ti on eur o p i s c h es kom i tee f r nor m ung management centre: rue de stassart, 36 b-1050 brusselslicensed copy: institute of technology tallaght, institute of technology, sun nov 18 04:49:01 gmt+00:00 2007, uncontrolled copy, (c) bsi 2001 cenall rights of exploitation in any form and by any means reserved worldwide for cen national members.ref. no. en 13743:2001 een 13743:2001 (e)licensed copy: institute of technology tallaght, institute of technology, sun nov 18 04:49:01 gmt+00:00 2007, uncontrolled copy, (c) bsicontentspageforeword .3introduction .31 scope .32 normative references .33 terms, definitions and symbols .44 list of hazards .75 requirements .75.1 maximum operating speeds.75.2 safety factors .75.3 maximum operating speeds, dimensions and dimensional limitations .85.4 requirements for back-up pads for vulcanised fibre discs.105.5 marking .106 inspection and testing by the manufacturer .106.1 test methods.106.2 scope of the inspection.127 information for use .12annex a (normative) marking.14a.1 purpose .14a.2 content of marking.14a.3 execution of marking .17annex b (informative) conversion table for speeds of rotation and peripheral speeds as a function of outside diameter d of the abrasive products.1817licensed copy: institute of technology tallaght, institute of technology, sun nov 18 04:49:01 gmt+00:00 2007, uncontrolled copy, (c) bsiforewordthis european standard has been prepared by technical committee cen/tc 143 machine tools safety the secretariat of which is held by snv.this european standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by june 2002, and conflicting national standards shall be withdrawn at the latest by june 2002.annex a is normative, and annex b is informative.according to the cen/cenelec internal regulations, the national standards organizations of the following countries are bound to implement this european standard: austria, belgium, czech republic, denmark, finland, france, germany, greece, iceland, ireland, italy, luxembourg, netherlands, norway, portugal, spain, sweden, switzerland and the united kingdom.introductionthis standard is addressed to designers, manufacturers, and suppliers of the abrasive products described in the scope. it also provides a means of supporting designers, manufacturers, and suppliers of grinding machines in the selection of abrasive products under the aspect of risk reduction and achievement of compliance of the corresponding machines with the essential safety requirements of the machinery directive.the extent to which hazards are covered is indicated in the scope of this standard.1scopethis european standard applies to the following coated abrasive products: flap wheels, flap discs, vulcanised fibre discs and spindle mounted flap wheels. it also applies to back-up pads for vulcanised fibre discs. it specifies requirements and/or measures for removal or reduction of hazards related to the design and application of the abrasive products and clamping devices.this standard covers also methods and tests for the assessment of conformity with the requirements as well as information for use which the manufacturer shall make available to the user.the hazards taken into account are indicated in clause 4 of this standard. the standard does not apply to non-woven web abrasive products.2normative referencesthis european standard incorporates by dated or undated reference, provisions from other publications. these normative references are cited at the appropriate places in the text, and the publications are listed hereafter. for dated references, subsequent amendments to or revisions of any of these publications apply to this european standard only when incorporated in it by amendment or revision. for undated references the latest edition of the publication referred to applies (including amendments).iso 554, standard atmospheres for conditioning and/or testing specifications.licensed copy: institute of technology tallaght, institute of technology, sun nov 18 04:49:01 gmt+00:00 2007, uncontrolled copy, (c) bsi3terms, definitions and symbolsfor the purposes of this european standard the following terms, definitions and symbols apply.3.1coated abrasivesabrasive products composed of backing, abrasive, and bond3.2clamping devicesdevices for fixing and positioning the abrasive product on the spindle of the grinding machine including e.g. back-up pads for vulcanised fibre discs, and chucking flanges for flap wheels3.3 grinding machines3.3.1stationary grinding machinesmachines fixed to their position during operation due to their nature or their mechanical attachment. they also include e.g. stationary swing-frame grinding machines and mobile machines maintained in position during operation by claming elements3.3.2mobile grinding machinesmachines guided manually (but not hand-held) during grinding, e.g. floor grinding machines3.3.3hand-held grinding machinesmachines, including those with flexible shaft, held in the hand during the grinding process3.4 type of applicationsee table mechanically guided grindingfeed movements of the abrasive product and/or workpiece are guided by mechanical means3.4.2manually guided grindingfeed movements of the abrasive product and/or the workpiece are manually guided by the operator3.4.3hand-held grindinggrinding machine is entirely guided by the operators handslicensed copy: institute of technology tallaght, institute of technology, sun nov 18 04:49:01 gmt+00:00 2007, uncontrolled copy, (c) bsitable 1 type of applicationtype of machinetype of applicationabrasive productworkpiecestationary grinding machinesmechanically guided grindingfixedguided mechanicallyguided mechanicallyfixedguided mechanicallyguided mechanicallystationary and mobile grinding machinesmanually guided grindingguided by handfixedfixedguided by handhand-held grinding machineshand-held grindingguided by handfixed3.5 dimensional abbreviationstable 2 dimensional abbreviationssymboldesignationdoutside diameter of abrasive productsd1diameter of support of flap wheels with fixed flange and of ring groove of flap wheels with loose flangehabrasive product bore diameterlslength of cross slots of vulcanised fibre discsl2length of spindle of spindle mounted flap wheelssddiameter of spindle of spindle mounted flap wheelstthickness of abrasive productslicensed copy: institute of technology tallaght, institute of technology, sun nov 18 04:49:01 gmt+00:00 2007, uncontrolled copy, (c) bsi3.6 symbols for speeds of rotation, operating speeds and safety factorstable 3 speed and testingsymboldesignationdefinitionunitnspeed of rotationrevolutions per minute (rpm)min- 1 or1 minnabdeflection speed of mounted wheelsspeed or rotation at which the spindle of mounted wheels is deflecting under centrifugal stressmin- 1 or1 minnmaxmaximum permissible speed of rotationrevolutions per minute (rpm) of the new abrasive product at maximum operating speedmin- 1 or1 minvperipheral surface speedspeed at the periphery of the abrasive productm/svsmaximum operating speedthe maximum permissible peripheral speed of a rotating abrasive productm/svprsafety test speedperipheral speed at which abrasive products are tested by the manufacturerm/sfprtest speed factorthe ratio of the safety test speed divided by the maximum operating speedvbrbursting speedthe peripheral surface speed at which the abrasive product breaks due to centrifugal forcem/svbr minminimum bursting speedperipheral speed which the abrasive product shall at least reach without bursting due to centrifugal forcem/sssafety factor against bursting due to centrifugal forcethe bursting speed, divided by the maximum operating speed, all squared.the formula for s is: v 2s = br v s sabsafety factor against deflection of the spindle of spindle mounted flap wheelsthe deflection speed divided by the admissible speed of rotation.the formula is:sab = nabnmax3.7 other definitions3.7.1 labelscarrier of information linked or added to the abrasive product containing essential safety information on the abrasiveproductlicensed copy: institute of technology tallaght, institute of technology, sun nov 18 04:49:01 gmt+00:00 2007, uncontrolled copy, (c) bsi4list of hazardstable 4 list of hazardsdesignation of hazardhazardous situations(examples)relevant clauses in the standardejection of parts1. abrasive product breakage caused by: improper design of abrasive product5.1, 5.2, 5.3, 5.4 manufacturing defects6 wrong selection of abrasive products5.5, 7, annex a improper handling and storage7 improper use(mounting and grinding process)72. loosening of grinding particles during grinding75requirements5.1 maximum operating speedsabrasive products shall be manufactured for maximum operating speeds classified in the following way: 16 16 20 25 32 35 40 45 50 63 80 in m/sconversion table for speeds of rotation and peripheral speeds as a function of outside diameter d of the abrasive products, see annex b.5.2 safety factorsabrasive products are subjected to high stresses during grinding. therefore they shall fulfil specified safety factors and bursting speeds at their maximum operating speed.5.2.1safety factors for flap wheels, flap discs and vulcanised fibre discsflap wheels, flap discs and vulcanised fibre discs shall fulfil safety factors and bursting speeds as a function of type of machine, type of application and maximum operating speed according to table 5.licensed copy: institute of technology tallaght, institute of technology, sun nov 18 04:49:01 gmt+00:00 2007, uncontrolled copy, (c) bsitable 5 maximum operating speeds, safety factors and minimum bursting speeds for flap wheels, flap discs and vulcanised fibre discstype of machinetype of applicationmaximum operating speed vsin m/ssafety factorsminimum bursting speed vbr minin m/sstationary and mobilegrinding machinesmechanically and manually guided grinding 1631632820335253433235535361403694537850387633109hand-held grinding machineshand-held grinding1632820335253433235535361403694537850387633,5118803,51505.2.2safety factors for spindle mounted flap wheelsspindle mounted flap wheels shall fulfil a safety factor against bursting due to centrifugal force of s = 3 at their maximum operating speed. the safety factor against deflection of the spi