SIST EN 13236:2011+A1:2016
(Main)Safety requirements for superabrasive products
Safety requirements for superabrasive products
This European Standard only applies to superabrasives products containing natural or synthetic diamond or cBN (cubic boron Nitride). It includes precision grinding and cutting-off wheels, non-precision cutting-off wheels, diamond wires, mounted points and other superabrasive products for non-precision grinding. It also applies to reconditioned superabrasive cutting-off wheels."
This European Standard specifies requirements and/or measures for the removal or reduction of hazards resulting from the design and application of the superabrasive products.
This European Standard contains also procedures and tests for verification of the compliance with the requirements as well as safety information for use which is to be made available to the user by the manufacturer.
The hazards taken into consideration are listed in Clause 4.
This European Standard does not apply to bonded abrasive products, coated abrasive products, rotating dressing tools, truers nor any non-rotating superabrasive products.
Sicherheitsanforderungen für Schleifwerkzeuge mit Diamant oder Bornitrid
Diese Europäische Norm gilt für folgende Schleifwerkzeuge mit Diamant oder Bornitrid: Präzisionsschleif- und -trennschleifscheiben, Trennschleifscheiben zur Bearbeitung von Naturstein und zum Einsatz im Hoch- und Tiefbau, Sägeseile, Schleifstifte und sonstige Schleifwerkzeuge mit Diamant oder Bornitrid zur Bearbeitung von Naturstein und zum Einsatz im Hoch- und Tiefbau.
Diese Europäische Norm legt Anforderungen und/oder Maßnahmen zur Beseitigung oder Verminderung von Gefährdungen fest, die von der Gestaltung und Anwendung der Schleifwerkzeuge mit Diamant oder Bornitrid her¬rühren.
Diese Europäische Norm umfasst auch Verfahren und Prüfungen zur Feststellung der Übereinstimmung mit den Anforderungen sowie Benutzerinformationen, die der Hersteller dem Anwender zur Verfügung zu stellen hat.
Die berücksichtigten Gefährdungen sind in Abschnitt 4 aufgeführt.
Diese Europäische Norm gilt nicht für Schleifkörper aus gebundenem Schleifmittel, Schleifmittel auf Unterlagen, rotierende Abrichtwerkzeuge, Handfeilen und andere nicht rotierende Schleifwerkzeuge mit Diamant oder Bornitrid.
Prescriptions de sécurité pour les produits superabrasifs
La présente Norme européenne est applicable uniquement aux produits superabrasifs contenant du diamant naturel ou synthétique ou du cBN (nitrure de bore cubique). Elle inclut les meules et meules à tronçonner de précision, meules à tronçonner ordinaires, câbles diamantés, meules sur tige et autres produits superabrasifs pour meulage ordinaire. Elle s'applique également aux meules à tronçonner superabrasives reconditionnées."
La présente Norme européenne spécifie les prescriptions et/ou mesures pour la suppression ou la réduction des phénomènes dangereux résultant de la conception ou de l'utilisation des produits superabrasifs.
La présente Norme européenne contient également les procédures et essais pour la vérification de la conformité aux prescriptions ainsi que les informations de sécurité pour l'utilisation qui doivent être mises à la disposition de l'utilisateur par le fabricant.
Les phénomènes dangereux à prendre en considération sont définis à l'Article 4.
La présente Norme européenne ne s'applique pas aux produits abrasifs agglomérés, produits abrasifs appliqués, outils à dresser rotatifs, outils à dresser ou autres produits superabrasifs non rotatifs.
Varnostne zahteve za superabrazive (vključno z dopolnilom A1)
Ta evropski standard velja le za superabrazive, ki vsebujejo naravne ali sintetične diamante ali kubne borove nitride (cBN). Vključuje plošče za precizno brušenje in rezanje, neprecizne plošče za rezanje, diamantne žice, nameščene konice in druge superabrazive za neprecizno brušenje. Prav tako velja za superabrazivne obnovljene plošče za rezanje.
Ta evropski standard določa zahteve in/ali ukrepe za odpravo ali zmanjševanje nevarnosti, ki so posledica načrtovanja in uporabe superabrazivov.
Ta evropski standard vsebuje tudi postopke in preskuse za preverjanje skladnosti z zahtevami in varnostnimi informacijami za uporabo, ki jih mora proizvajalec priskrbeti uporabniku.
Obravnavane nevarnosti so naveden v klavzuli 4.
Ta evropski standard ne velja za vezane abrazive, prevlečene abrazive, vrteče se orodje za brušenje, brusilce niti za katere koli druge nevrteče superabrazive.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Sicherheitsanforderungen für Schleifwerkzeuge mit Diamant oder BornitridPrescriptions de sécurité pour les produits superabrasifsSafety requirements for superabrasive products25.100.70BrusivaAbrasivesICS:Ta slovenski standard je istoveten z:EN 13236:2010+A1:2015SIST EN 13236:2011+A1:2016en,fr,de01-marec-2016SIST EN 13236:2011+A1:2016SLOVENSKI
STANDARDSIST EN 13236:20111DGRPHãþD
SIST EN 13236:2011+A1:2016
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13236:2010+A1
December
t r s w ICS
t wä s r rä y r Supersedes EN
s u t u xã t r s rEnglish Version
Safety requirements for superabrasive products Prescriptions de sécurité pour les produits superabrasifs
Sicherheitsanforderungen für Schleifwerkzeuge mit Diamant oder Bornitrid This European Standard was approved by CEN on
s x October
t r s r and includes Amendment
s approved by CEN on
s y November
t r s wä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s w CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s u t u xã t r s r ªA sã t r s w ESIST EN 13236:2011+A1:2016
EN 13236:2010+A1:2015 (E) 2 Contents Page European foreword . 5 Introduction . 7 1 Scope . 8 2 Normative references . 8 3 Terms, definitions and symbols . 8 3.1 General . 8 3.2 Grinding machines . 8 3.3 Grinding method . 9 3.4 Type of application . 9 3.5 Symbols . 11 3.6 Other symbols . 11 4 List of significant hazards . 12 5 Safety requirements . 12 5.1 General requirements . 12 5.2 Requirements for precision superabrasive grinding and cutting-off wheels . 13 5.2.1 Bore tolerances . 13 5.2.2 Sequence of maximum operating speeds . 13 5.2.3 Safety factors. 13 5.2.4 Maximum operating speeds . 13 5.2.5 Blotters . 14 5.3 Requirements for non-precision cutting-off wheels . 14 5.3.1 Bore tolerances . 14 5.3.2 Sequence of maximum operating speeds . 14 5.3.3 Safety factors. 15 5.3.4 Maximum operating speeds . 15 5.3.5 Requirements for the metal blank . 16 5.3.6 Requirements for the connection of the superabrasive section to the metal blank . 19 5.3.7 Tensioning of non-precision cutting-off wheels . 21 5.3.8 Limitation of sides abrasives and/or superabrasives coating . 21 5.4 Requirements for diamond wires . 21 5.4.1 General . 21 5.4.2 Requirements . 21 5.4.3 Maximum operating speeds . 22 5.5 Requirements for mounted points . 22 5.5.1 Spindle diameter tolerances . 22 5.5.2 Sequence of maximum operating speeds . 22 5.5.3 Safety factors. 22 5.6 Requirements for other superabrasive products for non-precision grinding . 22 5.6.1 Bore diameter tolerances . 22 5.6.2 Sequence of maximum operating speeds . 22 5.6.3 Safety factors. 22 5.6.4 Maximum operating speeds . 23 5.6.5 Requirements for the connection of the abrasive section to the core . 23 5.7 Marking . 24 SIST EN 13236:2011+A1:2016
EN 13236:2010+A1:2015 (E)
3 6 Verification of the safety requirements . 24 6.1 Verification of the general requirements . 24 6.1.1 Visual inspection . 24 6.1.2 Ring test . 24 6.2 Verification of the strength requirements . 24 6.2.1 Verification of the safety factor . 24 6.2.2 Verification of the bending moment of non-precision cutting-off wheels . 24 6.2.3 Verification of the strength requirements for other superabrasive products for non-precision grinding . 27 6.2.4 Verification methods for diamond wires . 28 6.3 Verification of marking . 30 6.4 Verification of the requirements for blotters . 30 6.5 Verification of tensioning of non-precision cutting-off wheels . 30 7 Information for use . 31 Annex A (normative)
Marking . 32 A.1 Content of the marking . 32 A.1.1 Marking requirements . 32 A.1.2 Additional inscriptions . 34 A.1.3 Multiple or gang mounted wheels . 34 A.2 Execution of the marking . 35 Annex B (normative)
Colour codes . 36 Annex C (informative)
Mounted points . 37 C.1 Example of calculation of the maximum permissible speed of rotation . 37 C.2 Example for the application of the calculation method . 40 C.2.1 Types of mounted points . 40 C.2.2 Assumptions for the calculation . 41 C.2.3 Maximum permissible speeds of rotation . 42 Annex D (normative)
Reconditioning of cutting-off wheels according to 5.3.6.4 . 44 D.1 Preconditions for reconditioning . 44 D.2 Additional marking requirements . 44 Annex E (informative)
Speed conversion table . 46 Bibliography . 49
Figures Figure 1 — Position of cuts and openings in steel blanks . 18 Figure 2 — Example of cut-outs and openings . 19 Figure 3 — Segmented cutting-off wheels: Dimensions of segment height X1 . 25 Figure 4 — Example of a bending test device for segmented cutting-off wheels . 25 Figure 5 — Cutting-off wheels with continuous rim: Dimensions of segment height X1 . 26 Figure 6 — Example of a bending test device for cutting-off wheels with continuous rim . 27 Figure 7 — Example of a shearing force test device . 28
Tables Table 1 — Grinding method, type of machine, type of application . 10 SIST EN 13236:2011+A1:2016
EN 13236:2010+A1:2015 (E) 4 Table 2 — Symbols . 11 Table 3 — Other symbols . 12 Table 4 — List of significant hazards . 12 Table 5 — Safety factors for precision superabrasive grinding and cutting-off wheels . 13 Table 6 — Maximum operating speeds as a function of the bond type . 14 Table 7 — Safety factors for non-precision cutting-off wheels . 15 Table 8 — Maximum operating speeds as a function of the bond type . 15 Table 9 — Dimensions of blanks for dry cutting-off . 16 Table 10 — Dimensions of blanks for wet cutting-off . 17 Table 11 — Bending strength b for cutting-off wheels for the use on hand-held cutting-off machines depending on segment height X1 and segment length L2 . 20 Table 12 — Minimum bending moment Mb . 20 Table 13 — Safety factors for other superabrasive products for non-precision grinding . 23 Table 14 — Maximum operating speeds as a function of the bond type . 23 Table A.1 — Marking of superabrasive products . 32 Table A.2 — Restrictions of use (RE) . 34 Table B.1 — Colour codes and design of colour codes . 36 Table C.1 — Designation of the calculation quantities . 39 Table C.2 — Designation of mounted points . 40 Table C.3 — Characteristics for the calculation of maximum speeds of rotation . 41 Table C.4 — Mounted points, cylindrical shape, plain spindles (ZYN) vitrified bond (V) . 42 Table C.5 — Mounted points, cylindrical shape, reduced spindles (ZYA), vitrified bond (V) . 42 Table C.6 — Mounted points, cylindrical shape, plain spindle Schaft (ZYN), electroplated bond (G) . 43 Table E.1 — Speed conversion . 46
SIST EN 13236:2011+A1:2016
EN 13236:2010+A1:2015 (E)
5 European foreword This document (EN 13236:2010+A1:2015) 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 2016 and conflicting national standards shall be withdrawn at the latest by June 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. The provisions of this European Standard need not be mandatory to superabrasive products manufactured the first 12 months after publication of this European Standard. This document includes Amendment 1 approved by CEN on 17 November 2015. This document supersedes !EN 13236:2010". The start and finish of text introduced or altered by amendment is indicated in the text by tags !". !Significant changes between EN 13236:2001 and EN 13236:2010 were as follows:" a) the standard was technically and editorially revised and partly adapted to EN 12413:2007 about bonded abrasive products and EN 13743:2009 about coated abrasive products; b) the term "burst speed factor" was included in Table 2, Table 5, Table 7 and Table 13; c) in the requirements it is now distinguished between precision and non-precision cutting-off wheels; d) new 5.3.5.3 defines restrictions in design and position of cuts and openings in the metal blank of cutting-off wheels for hand-held applications; e) changed 5.3.6.2 on dimensional limitations and bending moment for segmented non-precision cutting-off wheels for hand-held applications, with requirements now depending on segment height and segment length; f) requirements for reconditioned non-precision cutting-off wheels were included in new 5.3.6.4 and new normative Annex D; g) Clause 6 was shortened to verification of safety requirements. The scope of inspection and testing has been deleted because it is the responsibility of the manufacturer to put in place respective test procedures that give them the confidence that all safety requirements defined in this standard are respected; h) the requirements for colour code stripes were deleted in Annex A and are now presented in new Annex B; i) Table A.3 and Table A.4 about restrictions for use were combined to one table and thereby adapted to EN 12413 and EN 13743; j) Clause A.2 about execution of the marking was simplified; SIST EN 13236:2011+A1:2016
EN 13236:2010+A1:2015 (E) 6 k) Annex B about blotters was deleted and part of its content was included in 5.2.5; l) Annex C about mounted points was completely revised and shortened; m) Annex D with the speed conversion table (now Annex E) was editorially revised and maximum operating speeds above 320 m/s were deleted; n) Annex E about shapes and dimensions of grinding wheels and cutting-off wheels had become obsolete with publication of ISO 6104 and was therefore deleted; o) Annex F about grain sizes and concentration for diamond and cubic boron nitride had become obsolete with publication of ISO 6106 and was therefore deleted. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 13236:2011+A1:2016
EN 13236:2010+A1:2015 (E)
7 Introduction This European Standard has been prepared to provide one means of conforming with essential safety requirements, e.g. of the General Product Safety Directive and associated EFTA regulations. This European Standard is addressed to designers, manufacturers and suppliers of the superabrasive products described in the scope as well as to those who are reconditioning superabrasive cutting-off wheels. In addition, it helps designers, manufacturers and suppliers of grinding machines in the selection of superabrasive products, in order to reduce the risks and achieve conformity of the respective machinery with the Essential Safety Requirements of the Machinery Directive. The extent to which hazards are covered is indicated in the scope of this European Standard. SIST EN 13236:2011+A1:2016
EN 13236:2010+A1:2015 (E) 8 1 Scope !This European Standard only applies to superabrasives products containing natural or synthetic diamond or cBN (cubic boron Nitride). It includes precision grinding and cutting-off wheels, non-precision cutting-off wheels, diamond wires, mounted points and other superabrasive products for non-precision grinding. It also applies to reconditioned superabrasive cutting-off wheels." This European Standard specifies requirements and/or measures for the removal or reduction of hazards resulting from the design and application of the superabrasive products. This European Standard contains also procedures and tests for verification of the compliance with the requirements as well as safety information for use which is to be made available to the user by the manufacturer. The hazards taken into consideration are listed in Clause 4. This European Standard does not apply to bonded abrasive products, coated abrasive products, rotating dressing tools, truers nor any non-rotating superabrasive products. 2 Normative references !The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies." EN ISO 286-2:2010, Geometrical product specifications (GPS) — ISO code system for tolerances on linear sizes — Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts (ISO 286-2:2010) ISO 22917, Superabrasives — Limit deviations and run-out tolerances for grinding wheels with diamond or cubic boron nitride 3 Terms, definitions and symbols For the purposes of this document the following terms and definitions apply. 3.1 General 3.1.1 superabrasive product abrasive product containing natural or synthetic diamond or cubic boron nitride in a bond 3.2 Grinding machines 3.2.1 stationary grinding machine grinding machine being fixed in position during operation !Note 1 to entry: "See for example EN 13218. 3.2.2 mobile grinding machine grinding machine not being fixed in position during operation !Note 1 to entry: "Mobile grinding machines are manually guided (but not supported) by hand during use, e.g. floor grinding machines. SIST EN 13236:2011+A1:2016
EN 13236:2010+A1:2015 (E)
9 3.2.3 hand-held grinding machine grinding machine being held in the hand during the grinding process !Note 1 to entry: "See for example EN 792-7, EN 792-9, EN 60745-2-3 and EN ISO 19432. 3.2.4 grinding machine with totally enclosed working area stationary grinding machine being protected in such a way by separating guards that machining processes including loading and unloading of workpieces are carried out inside them and persons are protected against hazards generated by bursting of an abrasive product
3.3 Grinding method 3.3.1 peripheral grinding grinding with the periphery of the wheel with no or limited side loads 3.3.2 face grinding grinding with the face of the wheel 3.3.3 cutting-off slotting with the periphery of the cutting-off wheel 3.4 Type of application See Table 1. 3.4.1 mechanically guided grinding grinding process with feed movements of the abrasive product and/or workpiece guided by mechanical means 3.4.2 manually guided grinding grinding process with feed movements of the abrasive product and/or the workpiece manually guided by the operator 3.4.3 hand-held grinding grinding process with grinding machine entirely guided by the operator's hands SIST EN 13236:2011+A1:2016
EN 13236:2010+A1:2015 (E) 10 Table 1 — Grinding method, type of machine, type of application Grinding method Type of machine Type of application Superabrasive product Workpiece Examples for application/machines Grinding Stationary grinding machines Mechanically guided grinding Fixed Mechanically guided Surface grinding, centerless grinding,
creep feed grinding, bevel grinding on glass
(glass bevelling machine) Mechanically guided Fixed Profile grinding of stone and concrete Mechanically guided Mechanically guided Internal grinding, external, plunge and traverse grinding, jig grinding, decorative stone milling and polishing, pencil edging of glass (automotive glass) Stationary and mobile grinding machines Manually guided grinding Manually guided Fixed Roughing and polishing of stone floors
(carriage/floor grinding machine) Fixed Manually guided Tool grinding (bench grinding machine)
decorative glass grinding Hand-held grinding machines Hand-held grinding Manually guided Fixed Stone and concrete milling and polishing
(angle/straight grinder) Cutting-off Stationary cutting-off machines Mechanically guided cutting-off Fixed Mechanically guided Cutting-off of bricks and tiles (table saw) Mechanically guided Fixed Cutting-off of stone and concrete (bridge-type saw, floor and wall saw, wire saw) Mechanically guided Mechanically guided Cutting-off of semi-conductors Stationary and mobile cutting-off machines Manually guided cutting-off Manually guided Fixed Cutting-off of stone and concrete (table saw, floor saw) Fixed Manually guided Cutting-off of bricks (table saw) Hand-held cutting-off machines Hand-held cutting-off Manually guided Fixed Cutting-off of stone and concrete (angle grinder, hand-held cutting-off machine) SIST EN 13236:2011+A1:2016
EN 13236:2010+A1:2015 (E)
11 3.5 Symbols The symbols used in this European Standard are listed in Table 2. Table 2 — Symbols Symbol Designation Definition Unit nab Deflection speed of a mounted point Revolutions per minute at which the spindle of a rotating mounted point is deflecting under centrifugal force 1/min nmax Maximum permissible speed of rotation Revolutions per minute of a rotating new abrasive product at maximum operating speed 1/min Sab Safety factor against spindle deflection for mounted points Deflection speed divided by maximum permissible speed of rotation: maxnnSabab= — vs Maximum operating speed Maximum permissible peripheral speed of a rotating abrasive product m/s vbr Bursting speed Peripheral speed at which a rotating abrasive product breaks due to centrifugal force m/s vbr min Minimum bursting speed Peripheral speed, which a rotating abrasive product shall at least reach without bursting due to centrifugal force m/s fb
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