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1、BRITISH STANDARD BS EN 10045-2:1993 Charpy impact test on metallic materials Part 2: Method for the verification of impact testing machines The European Standard EN 10045-2:1993 has the status of a British Standard UDC 669:620.178.746.05:620.1 BS EN 10045-2:1993 This British Standard, having been pr
2、epared under the direction of the Iron and Steel and the Non-ferrous Metals Standards Policy Committees, was published under the authority of the Standards Board and comes into effect on 15 August 1993 BSI 03-1999 The following BSI references relate to the work on this standard: Committee reference
3、ISM/NFM/4 Draft for comment 90/43831 DC ISBN 0 580 21855 4 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: AustriaOesterreichisches Norm
4、ungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standardiseringsraad FinlandSuomen Standardisoimisliito, r.y. FranceAssociation franaise de normalisation GermanyDeutsches Institut fr Normung e.V. GreeceHellenic Organization for Standardization IcelandTechnological Institute of Icela
5、nd IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxembourgInspection du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund PortugalInstituto Portugus da Qualidade SpainAsociacin Espaola de Normalizacin
6、 y Certificacin SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalisation United KingdomBritish Standards Institution Amendments issued since publication Amd. No.DateComments BS EN 10045-2:1993 BSI 03-1999i Contents Page Cooperating organizationsInside front cover N
7、ational forewordii Foreword2 Text of EN 10045-25 National annex NA (informative) Committees responsibleInside back cover National annex NB (informative) Cross-referencesInside back cover BS EN 10045-2:1993 ii BSI 03-1999 National foreword This British Standard has been prepared under the direction o
8、f the Iron and Steel and the Non-ferrous Metals Standards Policy Committees and is the English language version of EN 10045-2 Metallic materials Charpy impact test Part 2: Verification of the testing machine (pendulum impact), drawn up by ECISS (European Committee for Iron and Steel Standardization)
9、 and published by the European Committee for Standardization (CEN). It incorporates the corrigendum dated 1993-04-07. It partially supersedes BS 131-4:1972. An amendment to BS 131-4 will be published simultaneously with this standard. BS 131-4 is to be used for the verification of Izod machines (whi
10、ch is not addressed in BS EN 10045-2). 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. Su
11、mmary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 20, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment
12、table on the inside front cover. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10045-2 November 1992 UDC 669:620.178.746.05:620.1 Descriptors: Metal products, mechanical tests, bend tests, impact tests, Charpy impact tests, test equipment, verification, definitions English version Metallic ma
13、terials Charpy impact test Part 2: Verification of the testing machine (pendulum impact) Matriaux mtalliques Essai de flexion par choc sur prouvette Charpy Partie 2: Vrification de la machine dessai (mouton-pendule) Metallische Werkstoffe Kerbschlagbiegeversuch nach Charpy Teil 2: Prfung der Prfmasc
14、hine (Pendelschlagwerk) This European Standard was approved by CEN on 1992-02-25. 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
15、bibliographical references concerning such national standards may be obtained on application to the Central Secretariat 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 responsibili
16、ty of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portu
17、gal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1992 Copyright reserved to CEN members Ref. No. EN 10045-2:1992 E EN 10045-2:1992 BSI
18、03-1999 2 Foreword This European Standard has been prepared by ECISS/TC 1A, Mechanical and physical tests, the secretariat of which is held by AFNOR. At its meeting on 25 and 26 January 1990, the TC agreed to publish this text as prEN (yellow proof). The following member bodies were represented at t
19、his meeting: Belgium, France, Germany, Italy, Luxembourg, Netherlands, Portugal, United Kingdom and also the BCR. At its meeting on 20th June 1991, the TC agreed to submit this document to COCOR for approval (white proof). The Coordinating Commission (COCOR) of ECISS agreed on 1991-11-27/28 to submi
20、t this draft European Standard to the CEN formal vote. This document was approved by CEN and according to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, iceland, Ireland, Italy,
21、 Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Page Foreword2 Introduction5 1Scope5 2Normative references5 3Definitions5 3.1Industrial pendulum impact testing machine5 3.2Reference pendulum impact testing machine5 3.3Anvils5 3.4Supports5 3.5Strike
22、r5 3.6Centre of striker6 3.7Centre of percussion6 3.8Rated initial potential energy (rated energy) AN6 3.9Effective initial potential energy (potential energy) Ap6 3.10 Indicated absorbed energy (indicated energy) As6 3.11 Effective energy absorbed (energy absorbed) Av6 3.12 Reference test piece6 3.
23、13 Reference value6 3.14 Geometry of the test piece7 3.15 Base of the frame7 4Symbols and designations7 5Direct verification of the pendulum impact testing machine8 5.1Machine framework8 5.2Pendulum9 5.3Framework/pendulum position9 5.4Test piece supports and anvils9 5.5Clearance between anvils and p
24、endulum9 5.6Position of centre of percussion10 5.7Energy indicator10 5.8Potential energy (Ap)11 5.9Indicated energy error (As)11 5.10 Friction losses11 5.11 Impact velocity12 6Indirect verification of the pendulum impact testing machine12 6.1Principle12 6.2Charpy V reference test pieces12 6.3Procedu
25、re12 EN 10045-2:1992 BSI 03-19993 Page 6.4Repeatability and error of the pendulum impact testing machine13 6.5Evaluation of the verification13 7Verification report14 8Intervals between indirect verifications14 8.1Direct verification14 8.2Indirect verification14 Annex A (informative) Direct method of
26、 verifying certain geometric properties using a jig15 Annex B (informative) Guide to preparation and characteristics of the Charpy V reference test pieces20 Figure 1 Test piece anvils and supports6 Figure 2 Representation of the definitions of the pendulum geometry8 Figure 3 Representation of the an
27、gles used for the calculation of the impact energy8 Figure 4 Types of striker10 Figure A.1 Jig16 Figure A.2 Change of position from A to B corresponding to the striker travelling 30 mm17 Figure A.3 Example of application of the jig illustrated in Figure A.118 Figure A.4 Example of application of the
28、 jig illustrated in Figure A.119 Table 17 Table 2 Values of the geometric properties13 Table 3 Repeatability and error values of the pendulum impact testing machine13 Table B.1 Dimensions of the reference test pieces20 Table B.2 Conditions of repeatability and error of the reference pendulum20 Table
29、 B.3 Values of the standard deviation for the characterization of the reference test piece batch20 4 blank EN 10045-2:1992 BSI 03-19995 Introduction The European Standard EN 10045 concerns metallic materials Charpy impact test and comprises the following Parts. Part 1: Method of test; Part 2: Verifi
30、cation of pendulum impact testing machines. 1 Scope This European standard applies to the verification of (pendulum) impact testing machines used for the Charpy impact test as described in EN 10045/1. It describes 2 methods: the direct method allowing the physical and geometrical properties of the d
31、ifferent parts of the testing machine to be verified statically and separately, the indirect method: global verification method of the pendulum impact testing machine using Charpy V reference test pieces as specified in 6.2. The direct method shall be used, firstly, when the machine is being install
32、ed or repaired and, secondly, if the indirect method gives an incorrect result (see 8.1), in order to find the reason for this. This standard is also applicable to reference pendulum impact testing machines, the geometrical characteristics of which are defined in Annex B. This standard is also appli
33、cable to pendulum impact machines of different capacities or different design. Pendulum impact testing machines verified in accordance with this standard and assessed as satisfactory are considered as valid to carry out impact testing with notches of different types. The apparatus used for the direc
34、t method shall have a certified traceability relative to the SI system of units. Annex A describes, for information purposes, a direct method of verifying certain geometrical properties using a jig. Annex B describes, for information purposes, a guide to the preparation of reference test pieces and
35、their characteristics. 2 Normative references This European Standard incorporates by dated and 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
36、 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. EN 10045/1, Metallic materials Charpy impact test Part 1: Test method. 3 D
37、efinitions For the purposes of this European Standard, the following definitions shall apply: 3.1 industrial pendulum impact testing machine pendulum impact testing machine used for industrial or laboratory tests, on metallic materials; these machines shall not be used for determining reference valu
38、es (see 3.13) 3.2 reference pendulum impact testing machine pendulum impact testing machine used for determining reference values. The requirements for verification of this type of machine are stricter than those for industrial machines (see B.3.1) 3.3 anvils part of the machine forming a vertical p
39、lane which holds the test piece when it is broken. The plane of the anvils is perpendicular to the plane of the supports (see Figure 1). 3.4 supports part of the machine forming a horizontal plane on which rests a test piece before it is broken by a hammer. The plane of the supports is perpendicular
40、 to the plane of the anvils (see Figure 1) 3.5 striker part of the hammer which is in contact with the test piece EN 10045-2:1992 6 BSI 03-1999 3.6 centre of striker the point on the striking edge of the pendulum which, when the pendulum is released, meets the horizontal plane over half the test pie
41、ce 3.7 centre of percussion the point on a body where, on impact, the percussion action is the same as if the total mass of the body were concentrated at this point. When a pendulum hammer strikes a blow in a horizontal line passing through the centre of percussion, there shall be no resultant actio
42、n on the axis of rotation (see Figure 2) 3.8 rated initial potential energy (rated energy) AN energy attributed by the designer of the pendulum hammer 3.9 effective initial potential energy (potential energy) Ap the value determined by direct verification 3.10 indicated absorbed energy (indicated en
43、ergy) As the value of the energy indicated by the pointer or read from the indicator 3.11 effective energy absorbed (energy absorbed) Av the total energy required to break a test piece when it is tested on a pendulum impact testing machine. It is equal to the difference in potential energy between t
44、he initial position of the pendulum and the end of the first half-swing during which the test piece is broken 3.12 reference test piece impact test piece used to verify the compliance of a pendulum hammer by comparison of the energy absorbed by the machine with the reference value supplied with the
45、test pieces 3.13 reference value value of the energy absorbed, supplied with the reference test pieces and determined by test on reference pendulum impact testing machines Figure 1 Test piece anvils and supports EN 10045-2:1992 BSI 03-19997 3.14 geometry of the test piece the test piece being placed
46、 on the supports in the test position: height: distance between the notched face and the opposite face; width: dimension perpendicular to the height that is parallel to the notch; length: largest dimension at right angles to the notch. 3.15 base of the frame part of the machine framework located bel
47、ow the horizontal plane of the supports 4 Symbols and designations For the purposes of this European Standard, the symbols and definitions given in Table 1 are applicable: Table 1 Symbolsa UnitDefinitions AN Ap As Av F F1 L l l1 l2 p p9 p t T TM Tm E EBCR J J J J N N m m m m J J J s s s s o o J J Ra
48、ted initial potential energy (rated energy) Effective initial potential energy (potential energy) Indicated absorbed energy (indicated energy) Effective energy absorbed (energy absorbed) Force exerted by the pendulum on the force-proving device for distance l2 Weight of pendulum Distance between the
49、 centre of the striker and the axis of rotation of the pendulum (length of the pendulum) Distance between the centre of gravity of the pendulum and the axis of rotation Distance between the centre of percussion and the axis of rotation Distance between the point of application of force F and the axis of rotation Friction losses due to the drag of the pointer Friction losses resulting from air resistance and beating friction Correction of the energy losses for a rise angle Period of swin
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