1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 12181-1:2011Geometrical pr o d u c t specifications (GPS) RoundnessPart 1: Vocabulary and parameters of roundnessBS EN ISO 12181-1:2011 BRITISH STANDARDNational forewor
2、dThis British Standard is the UK implementation of EN ISO 12181-1:2011. It supersedes DD CEN ISO/TS 12181-1:2007, which is withdrawn.The UK participation in its preparation was entrusted to T e c h n i c a l C o m m i t t e e T D W / 4 , T e c h n i c a l P r o d u c t R e a l i z a t i o n .A list
3、of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 66722 0 ICS 01.040.17; 17.040.20 Compliance w
4、ith a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2011.Amendments issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NOR
5、M EN ISO 12181-1 April 2011 ICS 01.040.17; 17.040.20 Supersedes CEN ISO/TS 12181-1:2007English Version Geometrical product specifications (GPS) - Roundness - Part 1: Vocabulary and parameters of roundness (ISO 12181-1:2011) Spcification gomtrique des produits (GPS) - Circularit -Partie 1: Vocabulair
6、e et paramtres de circularit (ISO 12181-1:2011) Geometrische Produktspezifikation (GPS) - Rundheit - Teil 1: Begriffe und Kenngren der Rundheit (ISO 12181-1:2011) This European Standard was approved by CEN on 17 March 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations wh
7、ich 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 CEN-CENELEC Management Centre or to any CEN member. This E
8、uropean 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members
9、 are the national standards bodies of 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, Slovenia, Spain, Sw
10、eden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR 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
11、. Ref. No. EN ISO 12181-1:2011: EBS EN ISO 12181-1:2011 EN ISO 12181-1:2011 (E) 3 Foreword This document (EN ISO 12181-1:2011) has been prepared by Technical Committee ISO/TC 213 “Dimensional and geometrical product specifications and verification“ in collaboration with Technical Committee CEN/TC 29
12、0 “Dimensional and geometrical product specification 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 nati
13、onal standards shall be withdrawn at the latest 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 superse
14、des CEN ISO/TS 12181-1:2007. 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, France, Germany, Gree
15、ce, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 12181-1:2011 has been approved by CEN as a EN ISO 12181-1:2011 without
16、 any modification. BS EN ISO 12181-1:2011ISO 12181-1:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .1 3.1 General terms 1 3.2 Terms relating to profiles .2 3.3 Terms relating to the reference circle .3 3.4 Te
17、rms relating to the circumference .4 3.5 Terms relating to the filter function.4 3.6 Terms relating to parameters.5 Annex A (informative) Mathematical definition of roundness tolerances of nominal integral features.7 Annex B (informative) Synoptic tables of terms, abbreviated terms and parameters.9
18、Annex C (informative) Relationship to the GPS matrix model .11 Bibliography13 BS EN ISO 12181-1:2011ISO 12181-1:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The wor
19、k of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governme
20、ntal, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The m
21、ain task of technical committees is to prepare International Standards. 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. A
22、ttention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 12181-1 was prepared by Technical Committee ISO/TC 213, Dimensional and geometrical product specif
23、ications and verification. This first edition of ISO 12181-1 cancels and replaces ISO/TS 12181-1:2003, which has been technically revised. ISO 12181 consists of the following parts, under the general title Geometrical product specifications (GPS) Roundness: Part 1: Vocabulary and parameters of round
24、ness Part 2: Specification operators BS EN ISO 12181-1:2011ISO 12181-1:2011(E) ISO 2011 All rights reserved vIntroduction This part of ISO 12181 is a geometrical product specification (GPS) standard and is to be regarded as a general GPS standard (see ISO/TR 14638). It influences chain link 2 of the
25、 chain of standards on form of a surface (independent of a 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. The fundamental rules of ISO/GPS given in ISO 8015 apply to this document and the default decision rules given in
26、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 12181 to other standards and the GPS matrix model, see Annex C. This part of ISO 12181 defines terms and concepts necessary for
27、 defining the specification operators according to ISO 17450-2 for roundness of integral features. Extracting data always involves applying a certain filtering process. An additional filtering of the extracted data might or might not be applied. This additional filter can be a mean line filter (Gaus
28、sian, spline, wavelet, etc.) or a non-linear filter (e.g. morphological filter). The type of filtering influences the actual specification operator and, consequently, the actual definition of roundness. Therefore, the type of filtering needs to be stated unambiguously. This part of ISO 12181 is not
29、intended to disallow any means of measuring roundness. BS EN ISO 12181-1:2011BS EN ISO 12181-1:2011INTERNATIONAL STANDARD ISO 12181-1:2011(E) ISO 2011 All rights reserved 1Geometrical product specifications (GPS) Roundness Part 1: Vocabulary and parameters of roundness 1 Scope This part of ISO 12181
30、 defines the terms and concepts related to the roundness of individual integral features and covers complete roundness profiles only. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies
31、. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 14660-1:1999, Geometrical Product Specifications (GPS) Geometrical features Part 1: General terms and definitions ISO 14660-2:1999, Geometrical Product Specifications (GPS) Geometrical fea
32、tures Part 2: Extracted median line of a cylinder and a cone, extracted median surface, local size of an extracted feature ISO 17450-1:1), Geometrical product specifications (GPS) General concepts Part 1: Model for geometrical specification and verification 3 Terms and definitions For the purposes o
33、f this document, the terms and definitions given in ISO 14660-1, ISO 14660-2 and ISO 17450-1 and the following apply. 3.1 General terms 3.1.1 roundness property of a circle 3.1.2 roundness axis axis of a feature associated to an integral feature NOTE The integral feature can be a cylindrical surface
34、 or a surface of revolution. 1) To be published. (Revision of ISO/TS 17450-1:2005) BS EN ISO 12181-1:2011ISO 12181-1:2011(E) 2 ISO 2011 All rights reserved3.1.3 roundness plane plane perpendicular to the roundness axis within the full extent of the feature 3.2 Terms relating to profiles 3.2.1 extrac
35、ted circumferential line roundness digital representation of the intersection of the real surface and the roundness plane NOTE The extraction conventions for roundness are given in ISO 12181-2. This extracted circumferential line is an extracted integral feature as defined in ISO 14660-1. 3.2.2 roun
36、dness profile extracted circumferential line intentionally modified by a filter NOTE This is the profile to which the concepts and parameters of this part of ISO 12181 can be applied. 3.2.3 local roundness deviation minimum distance from a point on a roundness profile to the reference circle See Fig
37、ures 1 and 2. NOTE 1 For reference circle, see 3.3.1. NOTE 2 The deviation is negative if from the reference circle the point lies in the direction of the material. Key 1 reference circle aPositive local deviation. bNegative local deviation. Figure 1 Local form deviation of an internal roundness fea
38、ture BS EN ISO 12181-1:2011ISO 12181-1:2011(E) ISO 2011 All rights reserved 3Key 1 reference circle aNegative local deviation. bPositive local deviation. Figure 2 Local form deviation of an external roundness feature 3.3 Terms relating to the reference circle 3.3.1 reference circle associated circle
39、 fitting the roundness profile in accordance with specified conventions, to which the deviations from roundness and the roundness parameters are referred 3.3.1.1 minimum zone reference circles two concentric circles enclosing the roundness profile and having the least radial separation NOTE The abbr
40、eviated term MZ is used to refer to minimum zone reference elements. 3.3.1.1.1 outer minimum zone reference circle outer circle of the minimum zone reference circles 3.3.1.1.2 inner minimum zone reference circle inner circle of the minimum zone reference circles 3.3.1.1.3 mean minimum zone reference
41、 circle arithmetic mean circle of the minimum zone reference circles 3.3.1.2 least squares reference circle circle such that the sum of the squares of the local roundness deviations is a minimum NOTE The abbreviated term LS is used to refer to least squares reference elements and the letter G (for G
42、aussian) is used as a prefix for parameters based on least squares reference elements. 3.3.1.3 minimum circumscribed reference circle smallest possible circle that can be fitted around the roundness profile NOTE The abbreviated term MC is used to refer to minimum circumscribed reference elements. BS
43、 EN ISO 12181-1:2011ISO 12181-1:2011(E) 4 ISO 2011 All rights reserved3.3.1.4 maximum inscribed reference circle largest possible circle that can be fitted within the roundness profile NOTE 1 Cases exist where the maximum inscribed reference circle is not unique. NOTE 2 The abbreviated term MI is us
44、ed to refer to maximum inscribed reference elements. 3.3.2 associated derived centre centre of the reference circle(s) 3.4 Terms relating to the circumference 3.4.1 undulations per revolution UPR number of sinusoidal undulations contained in the roundness profile 3.4.2 circumferential wavelength cir
45、cumference of the reference circle divided by the UPR 3.5 Terms relating to the filter function 3.5.1 General NOTE 1 If not otherwise specified, the details of the filter characteristics are as given in ISO 12181-2. NOTE 2 Only the phase correct mean line filter is defined (see ISO 11562). Consequen
46、tly, the terms in this subclause relate only to this type of filter. Other filter methods are currently being investigated by ISO. It is intended to incorporate these new filters in a future edition of this part of ISO 12181. 3.5.2 wave filter filter operating on a closed profile, transmitting a ran
47、ge of sinusoidal undulations for which the ratio of output to input amplitude is defined, while attenuating (i.e. reducing) the ratio for undulations lying outside the range at either or both ends 3.5.3 undulation cut-off cut-off wavelength of the filter applied to the extracted circumferential line
48、 NOTE These are usually defined in terms of undulations per revolution, UPR. 3.5.4 transmission band for roundness profiles band of sinusoidal profile undulations which are transmitted by greater than a specified percentage by the filter, defined by the values of the upper and lower undulation cut-o
49、ff NOTE The specified percentage is usually 50 %. BS EN ISO 12181-1:2011ISO 12181-1:2011(E) ISO 2011 All rights reserved 53.6 Terms relating to parameters 3.6.1 General parameters 3.6.1.1 peak-to-valley roundness deviation value of the largest positive local roundness deviation added to the absolute value of the largest negative local roundness deviation NOTE 1 The peak-to-valley roundness deviation is defined for all reference circles. NOTE 2 The peak-to-valley roundness deviation is the only parameter that is
