1、July 2011 Translation by DIN-Sprachendienst.English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 1
2、7.040.30!$sj“1805671www.din.deDDIN EN ISO 12780-2Geometrical product specifications (GPS) Straightness Part 2: Specification operators (ISO 12780-2:2011)English translation of DIN EN ISO 12780-2:2011-07Geometrische Produktspezifikation (GPS) Geradheit Teil 2: Spezifikationsoperatoren (ISO 12780-2:20
3、11)Englische bersetzung von DIN EN ISO 12780-2:2011-07Spcification gomtrique des produits (GPS) Rectitude Partie 2: Oprateurs de spcification (ISO 12780-2:2011)Traduction anglaise de DIN EN ISO 12780-2:2011-07SupersedesDIN ISO/TS 12780-2:2008-05www.beuth.deDocument comprises pagesIn case of doubt, t
4、he German-language original shall be considered authoritative.1607.11 DIN EN ISO 12780-2:2011-07 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 213 “Dimensional and geometrical product specifications and verification” in colla
5、boration with Technical Committee CEN/TC 290 “Dimensional and geometrical product specification and verification” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Technische Grundlagen (Fundamental Technical Standards Committee), Working C
6、ommittee NA 152-03-02-13 UA Formprfung (GMA 3.21). The International Standards ISO 12180-1 and ISO 12180-2 ISO 12181-1 and ISO 12181-2 ISO 12780-1 and ISO 12780-2 ISO 12781-1 and ISO 12781-2 defining the vocabulary (Parts 1) and the principles of measurement (Parts 2) of deviations from roundness, c
7、ylindricity, straightness and flatness have been prepared by Technical Committee ISO/TC 213 “Dimensional and geometrical product specifications and verification”. The responsible German body involved in its preparation was the Joint Working Committee DIN NA 152-03-02-13 UA/VDI/VDE-GMA 3.21 Formprfun
8、g which recommends: Users of this standard should note that the provisions in Part 2 of the respective standard regarding probe tip radius, probing force, defaults for filter undulation, method of association are representative of idealized measurement conditions. As a basis for the practical implem
9、entation, the Joint Working Committee established the VDI/VDE 2631 guideline series on form measurement. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 11562 DIN EN ISO 11562 ISO 12780-1 DIN EN ISO 12780-1 ISO 14253-1 DIN EN ISO 14253-
10、1 ISO 17450-2 DIN EN ISO 17450-21)1) In preparation. DIN EN ISO 12780-2:2011-07 3 Amendments This standard differs from DIN ISO/TS 12780-2:2008-05 as follows: a) the Technical Specification has been adopted as an International Standard; b) the standard has been technically revised. Previous editions
11、 DIN ISO/TS 12780-2: 2005-07, 2008-05 National Annex NA (informative) Bibliography DIN EN ISO 11562, Geometrical Product Specifications (GPS) Surface texture: Profile method Metrological characteristics of phase correct filters DIN EN ISO 12780-1, Geometrical product specifications (GPS) Straightnes
12、s Part 1: Vocabulary and parameters of straightness DIN EN ISO 14253-1, Geometrical product specifications (GPS) Inspection by measurement of workpieces and measuring equipment Part 1: Decision rules for proving conformance or non-conformance with specifications DIN EN ISO 17450-2, Geometrical produ
13、ct specifications (GPS) General concepts Part 2: Basic tenets, specifications, operators and uncertainties DIN EN ISO 12780-2:2011-07 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12780-2 April 2011 ICS 17.040.01 Supersedes CEN ISO/TS 12780-2:2007English
14、 Version Geometrical product specifications (GPS) - Straightness - Part 2: Specification operators (ISO 12780-2:2011) Spcification gomtrique des produits (GPS) - Rectitude -Partie 2: Oprateurs de spcification (ISO 12780-2:2011) Geometrische Produktspezifikation (GPS) - Geradheit - Teil 2: Spezifikat
15、ionsoperatoren (ISO 12780-2:2011) This European Standard was approved by CEN on 17 March 2011. 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-da
16、te lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC 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
17、 under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Fra
18、nce, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE F
19、R NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 12780-2:2011: EContents Page 2 Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definit
20、ions .5 4 Complete specification operator5 4.1 General5 4.2 Transmission band6 4.3 Probing system7 5 Compliance with specification .7 Annex A (informative) Harmonic content of a nominally straight workpiece .8 Annex B (informative) Relationship to the GPS matrix model10 Bibliography 12 DIN EN ISO 12
21、780-2:2011-07 EN ISO 12780-2:2011 (E) Foreword This document (EN ISO 12780-2:2011) has been prepared by Technical Committee ISO/TC 213 “Dimensional and geometrical product specifications and verification” in collaboration with Technical Committee CEN/TC 290 “Dimensional and geometrical product speci
22、fication and verification” the secretariat of which is held by AFNOR. 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 October 2011, and conflicting national standards shall be withdrawn at the lat
23、est by October 2011. 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. This document supersedes CEN ISO/TS 12780-2:2007. ISO 12780 consi
24、sts of the following parts, under the general title Geometrical product specifications (GPS) Straightness: Part 1: Vocabulary and parameters of straightness Part 2: Specification operators According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countr
25、ies are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Sloven
26、ia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 12780-2:2011 has been approved by CEN as a EN ISO 12780-2:2011 without any modification. 3 DIN EN ISO 12780-2:2011-07 EN ISO 12780-2:2011 (E) Introduction This part of ISO 12780 is a geometrical product specifi
27、cation (GPS) standard and is to be regarded as a general GPS standard (see ISO/TR 14638). It influences chain link 3 of the chain of standards on form of line independent of datum. The ISO/GPS Masterplan given in ISO/TR 14638 gives an overview of the ISO/GPS system of which this document is a part.
28、The fundamental rules of ISO/GPS given in ISO 8015 apply to this document and the default decision rules given in ISO 14253-1 apply to specifications made in accordance with this document, unless otherwise indicated. For more detailed information on the relationship of this part of ISO 12780 to othe
29、r standards and the GPS matrix model, see Annex B. This part of ISO 12780 specifies the specification operators according to ISO 17450-2 for straightness of integral features. This part of ISO 12780 does not specify defaults for filter cut-off, probe tip radius and method of association (reference l
30、ine). This means that it is necessary for a straightness specification to explicitly state which values are to be used for these specification operations in order for it to be unique. Consequently, if a specification does not explicitly state which values are to be used for one or more of these oper
31、ators, the specification is ambiguous (see ISO 17450-2) and a supplier can use any value for the operator(s) not specified when proving conformance. Extracting data always involves applying a certain filtering process. An additional filtering of the extracted data might or might not be applied. This
32、 additional filter can be a mean line filter (Gaussian, spline, wavelet, etc.) or a non-linear filter (e.g. morphological filter). The type of filtering influences the definition of straightness and the specification operators and, therefore, needs to be stated unambiguously. NOTE 1 Stylus filtering
33、 is not sufficient on its own to smooth a profile. In certain circumstances, it can create spurious high-frequency content, thus giving incorrect values. To correct this, a longwave-pass filter can be employed. A Gaussian filter is used, since this is the state-of-the-art. This filter has some short
34、comings, e.g. it can distort rather than eliminate some roughness features and it can distort rather than transmit correctly some waviness features. It is envisioned that new filters under development within ISO provide better solutions for several of these issues. NOTE 2 If a smaller tip radius tha
35、n the one specified is used for a given cut-off length, the resulting measured value is generally higher. This effect is usually insignificant. If a larger tip radius is used, the resulting measured value is generally lower. The amount of change is heavily dependent on the surface measured. NOTE 3 T
36、he measuring force of 0 N is chosen to eliminate effects of elastic deformation of the workpiece from the specification operator. On metal surfaces with adequate thickness, the effect of normally occurring measuring forces is negligible. NOTE 4 Aliasing and other problems during extraction (see Anne
37、x A), due to the higher harmonic content of the skin model, in the straightness directions, can cause specification uncertainty. This part of ISO 12780 is not intended to disallow any means of measuring straightness. 4 DIN EN ISO 12780-2:2011-07 EN ISO 12780-2:2011 (E) 1 Scope This part of ISO 12780
38、 specifies the complete specification operator for straightness of integral features only and covers complete straightness profiles only, i.e. geometrical characteristics of features of type line. NOTE Straightness of an extracted median line of a cylinder is defined in ISO 12180-1. 2 Normative refe
39、rences The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 11562:1996, Geometrical Product Specif
40、ications (GPS) Surface texture: Profile method Metrological characteristics of phase correct filters ISO 12780-1:2011, Geometrical product specifications (GPS) Straightness Part 1: Vocabulary and parameters of straightness ISO 14253-1:1998, Geometrical Product Specifications (GPS) Inspection by meas
41、urement of workpieces and measuring equipment Part 1: Decision rules for proving conformance or non-conformance with specifications ISO 17450-2:1), Geometrical product specifications (GPS) General concepts Part 2: Basic tenets, specifications, operators and uncertainties 3 Terms and definitions For
42、the purposes of this document, the terms and definitions given in ISO 12780-1 and ISO 17450-2 apply. 4 Complete specification operator 4.1 General The complete specification operator (see ISO 17450-2) is a full ordered set of unambiguous specification operations in a well-defined order. The complete
43、 specification operator defines the transmission band for the straightness profile, together with an appropriate stylus tip geometry. 1) To be published. (Revision of ISO/TS 17450-2:2002) 5 DIN EN ISO 12780-2:2011-07 EN ISO 12780-2:2011 (E) 4.2 Transmission band 4.2.1 Longwave-pass filter The longwa
44、ve-pass filter shall be a phase correct filter (according to ISO 11562) transmitting waves of infinite length and attenuating profile undulations progressively in the undulation region around the cut-off length (see Figure 1). Key X wavelength, in millimetres Y transmission, as a percentage NOTE Oth
45、er filter values than those shown in this figure can be used, if necessary for the application. Figure 1 Transmission characteristic for longwave-pass filter having cut-off lengths c= 0,08 mm; 0,25 mm; 0,8 mm; 2,5 mm; 8 mm The attenuation function is given by: 2c10aea= where ()ln 20,469 7 =a0is the
46、amplitude of sine wave undulation before filtering; a1is the amplitude of this sine wave undulation after filtering; cis the cut-off length of the longwave-pass filter; is the wavelength of the sine wave. 6 DIN EN ISO 12780-2:2011-07 EN ISO 12780-2:2011 (E) 4.2.2 Cut-off wavelengths The profile filt
47、er determines the range of periodic sinusoidal undulations of the feature included in the straightness assessment. The range is terminated by values taken from Table 1. Table 1 also gives the maximum sample point spacing that shall be used for the extracted line and the stylus tip radius needed to a
48、void distortion of the straightness profile from the influence of the stylus tip. Table 1 Cut-off values Dimensions in millimetresLongwave-pass filters Filter transmitting from infinite wavelength down to Maximum sample point spacingMaximum stylus tip radiusaR 8 1,14 5 2,5 0,357 1,5 0,8 0,114 0,5 0,
49、25 0,035 7 0,15 0,08 0,011 4 0,05 aWhen the maximum stylus tip radius requirement is fulfilled, the radius of the stylus tip is of comparable size to the wavelength of the shortest undulations transmitted by the profile filter. This is consistent with the stylus tip radius requirements for surface texture measuring instruments (see ISO 3274). NOTE 1 The required number of points corresponds to seven sample points for each cut-off, which is the minimum number of points to be assessed. NOTE
