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1、BRITISH STANDARD BS EN ISO 3650:1999 Geometrical Product Specifications (GPS) Length standards Gauge blocks The European Standard EN ISO 3650:1998 has the status of a British Standard ICS 17.040.30 BS EN ISO 3650:1999 This British Standard, having been prepared under the direction of the Engineering
2、 Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 May 1999 BSI 03-2000 ISBN 0 580 32485 0 National foreword This British Standard is the English language version of EN ISO 3650:1998. It is identical with ISO 3650:1998. It supersedes BS 4311-1
3、:1993 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee TDE/4, Engineering drawing, metrology, precision measurement and all related documentation, to Subcommittee TDE/4/-/4, Engineers precision measuring equipment including limits and fits, which has t
4、he responsibility to: aid enquirers to understand the text; present to the responsible international/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
5、 UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding
6、European publications. The British Standards which implement these international or European publications 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.
7、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. Summary of pages This document comprises
8、a front cover, an inside front cover, pages i and ii, the EN ISO title page, page 2, the ISO title page, pages ii to iv, pages 1 to 14, 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 a
9、mendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments BS EN ISO 3650:1999 BSI 03-2000i Contents Page National forewordInside front cover Foreword2 Forewordiv Text of ISO 36501 ii blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3650 December
10、 1998 ICS 17.040.30 Descriptors: English version Goemetrical product specifications (GPS) Length standards Gauge blocks (ISO 3650:1998) Spcification gomtrique des produits (GPS) Etalons de longueur Cales-talons (ISO 3650:1998) Geometrische Produktspezifikation (GPS) Lngennormale Parallelendmae (ISO
11、3650:1998) This European Standard was approved by CEN on 8 November 1998. 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 bibliogr
12、aphical 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 responsibility of a
13、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, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norwa
14、y, Portugal, 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 1998 CEN All rights of exploitation in any form and by any means reserved worl
15、dwide for CEN national Members. Ref. No. EN ISO 3650:1998 E EN ISO 3650:1998 BSI 03-2000 2 Foreword The text of the International Standard ISO 3650:1998 has been prepared by Technical Committee ISO/TC 213 “Dimensional and geometrical product specification and verification” in collaboration with Tech
16、nical Committee CEN/TC 290 “Dimensional and geometrical product specification and verification”, the secretariat of which is held by DIN. 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 1999,
17、 and conflicting national standards shall be withdrawn at the latest by June 1999. 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, Fra
18、nce, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 3650:1998 has been approved by CEN as a European Standard without any modification. NOTENormative
19、 references to International Standards are listed in Annex ZA (normative). EN ISO 3650:1998 ii BSI 03-2000 Contents Page Forewordiv Introduction1 1Scope1 2Normative references1 3Definitions1 4Nomenclature of faces4 5Basis of measurement, traceability, reference condition4 5.1Unit of length: metre4 5
20、.2Traceability of the length of a gauge block4 5.3Reference temperature and standard pressure4 5.4Reference orientation of gauge blocks5 6General dimensions, material properties, marking5 6.1General dimensions5 6.2Material properties5 6.2.1 Material5 6.2.2 Coefficient of thermal expansion6 6.2.3 Har
21、dness6 6.2.4 Dimensional stability6 6.3Marking6 7Metrological requirements6 7.1General6 7.2Flatness tolerance, tf7 7.2.1 Gauge blocks with nominal lengths exceeding 2,5 mm7 7.2.2 Gauge blocks with nominal lengths up to 2,5 mm7 7.3Measuring faces7 7.4Side faces7 7.4.1 Flatness7 7.4.2 Parallelism7 7.4
22、.3 Perpendicularity7 7.4.4 Edges9 8Calibration of gauge blocks9 8.1General9 8.2Wringing test9 8.3Measurement by interferometry9 8.3.1 Measured length9 8.3.2 Auxiliary plate9 8.3.3 Corrections to measurements by interferometry9 8.3.4 Calibration certificate9 8.4Measurement by comparison10 8.4.1 Princ
23、iple of measurement10 8.4.2 Central length10 8.4.3 Method of determining length by comparison10 8.4.4 Variation in length10 8.4.5 Corrections11 8.4.6 Calibration certificate11 Annex A (informative) Example of a device for the comparison of gauge blocks12 Annex B (informative) Relation to the GPS mat
24、rix model13 Annex C (informative) Bibliography14 EN ISO 3650:1998 BSI 03-2000iii Page Annex ZA (normative) Normative references to international publications with their relevant European publicationsInside back cover Figure 1 Central length lc and another example of length l at any point of a gauge
25、block wrung to the plane surface of an auxiliary plate2 Figure 2 Deviation fd from flatness3 Figure 3 Nominal length ln; central length lc; variation with fo and fu; limit deviations te for the length at any point, proceeding from the nominal length3 Figure 4 Nomenclature of faces4 Figure 5 Dimensio
26、ns of coupling holes in mm5 Figure 6 Perpendicularity deviation of side faces with a measuring face as a datum8 Figure 7 Measurement of central length by comparison taking the perpendicular distance from the centre of a measuring face to the opposite one10 Figure A.1 Example of a comparator for gaug
27、e blocks of nominal lengths up to 100 mm12 Figure B.113 Table 1 Cross section5 Table 2 Dimensional stability6 Table 3 Flatness tolerance tf7 Table 4 Perpendicularity tolerance7 Table 5 Limit deviation, te, of the length at any point of the measuring face from and tolerance, tv, for the variation in
28、length8 Descriptors: Geometrical product specifications, dimensional measurements, mechanical measuring instruments, standard gauges, block gauges, specifications, materials specifications, dimensions, dimensional tolerances, form tolerances, marking, calibration. EN ISO 3650:1998 iv BSI 03-2000 For
29、eword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a tech
30、nical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
31、 electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 3650 was pr
32、epared by Technical Committee ISO/TC 213, Dimensional and geometrical product specifications and verification. This second edition cancels and replaces the first edition (ISO 3650:1978), which has been technically revised. Annex A, Annex B and Annex C of this International Standard are for informati
33、on only. EN ISO 3650:1998 BSI 03-20001 Introduction This International Standard is a geometrical product specification standard and is to be regarded as a general GPS standard (see ISO/TR 14638). It influences chain link 6 (Calibration requirements Calibration standards) of the chain of standards on
34、 size and distance. For more detailed information on the relation of this standard to the GPS matrix model, see Annex B. Gauge blocks are length standards representing specified fractions of the unit of length, the metre, of the international system of units SI. Depending on the kind of application
35、and the required quality, gauge blocks are offered in several grades. The calibration of the gauge blocks, i.e. the measurement of the length value at a specified point of the measuring face and the evaluation of the measurement uncertainty, is the basis for the application of gauge blocks as length
36、 standards. 1 Scope This International Standard specifies the most important design and metrological characteristics of gauge blocks with a rectangular cross section and a nominal length ln ranging from 0,5 mm to 1 000 mm. Limit deviations and tolerances are stated for the calibration grade K and fo
37、r the grades 0, 1 and 2 for various measuring purposes. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subj
38、ect to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 1:1975, Stand
39、ard reference temperature for industrial length measurements. ISO 1101:, Geometrical Product Specifications (GPS) Geometrical tolerancing Generalities, definitions, symbols, indication on drawings1). ISO 6507-1:1997, Metallic materials Vickers hardness test Part 1: Test method. ISO 14253-1:1998, Geo
40、metrical Product Specifications (GPS) Inspection by measurement of workpieces and measuring equipment Part 1: Decision rules for proving conformance or non-conformance with specifications. International vocabulary of basic and general terms in metrology (VIM). BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OIM
41、L, 2nd edition, 1993. 3 Definitions For the purposes of this International Standard, the definitions given in ISO 14253-1, VIM and the following apply. 3.1 gauge block material measure of rectangular section, made of wear-resistant material, with one pair of planar, mutually parallel measuring faces
42、, which can be wrung to the measuring faces of other gauge blocks to make composite assemblies, or to similarly finished surfaces of auxiliary plates for length measurements 3.2 length of a gauge block l perpendicular distance between any particular point of the measuring face and the planar surface
43、 of an auxiliary plate of the same material and surface texture upon which the other measuring face has been wrung 1) To be published. (Revision of ISO 1101:1983) EN ISO 3650:1998 2 BSI 03-2000 see Figure 1 NOTE 1The length of a gauge block, l, includes the effect of one-face wringing (see 8.3.1). N
44、OTE 2The length, l, is a physical quantity consisting of a numerical value and a length unit (e.g. metre, millimetre or micrometre). If only the numerical value is treated (e.g. in tables), the units should be stated explicitly. 3.3 central length of a gauge block lc length of a gauge block taken at
45、 the centre point of the free measuring face see Figure 1 NOTELength lc is a special instance of length l. 3.4 deviation of the length at any point from nominal length e algebraic difference l ln 3.5 deviation from flatness fd minimum distance between two parallel planes between which all points of
46、the measuring face lie Figure 1 Central length lc and another example of length l at any point of a gauge block wrung to the plane surface of an auxiliary plate EN ISO 3650:1998 BSI 03-20003 see Figure 2 3.6 variation in length difference between the maximum length lmax and the minimum length lmin s
47、ee Figure 3 NOTEThe variation in length is equal to the sum of the deviations fo and fu from the central length lc. 3.7 wringing property of the measuring faces of gauge blocks to adhere to other measuring faces or to faces with similar surface finish as a result of molecular forces 1) See 7.1. Figu
48、re 2 Deviation fd from flatness NOTESee Table 4. Figure 3 Nominal length ln; central length lc; variation with fo and fu; limit deviations te for the length at any point, proceeding from the nominal length EN ISO 3650:1998 4 BSI 03-2000 4 Nomenclature of faces See Figure 4. 5 Basis of measurement, t
49、raceability, reference condition 5.1 Unit of length: metre The metre is defined as the length of the path travelled by light in vacuum in 1/299 792 458 of a second (17th General Conference of Weights and Measures, 1983). The definition is realized by working wavelength standards recommended by the International Committee of Weights and Measures (CIPM). 5.2 Traceability of the length of a gauge block The measured length of a gauge block is traceable to national or international length
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