1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58evaluation of coordinate measuring machine (CMM) test uncertaintyICS 17.020; 17.040.30Geometrical p
2、roduct specifications (GPS) Guidelines for the DRAFT FOR DEVELOPMENTDD ISO/TS 23165:2006DD ISO/TS 23165:200This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 28 September 2007 BSI 2007ISBN 978 0 580 57458 0to withdraw it. Comments should be
3、 sent to the Secretary of the responsible BSI Technical Committee at British Standards House, 389 Chiswick High Road, London W4 4AL.The UK participation in its preparation was entrusted to Technical Committee TDW/4, Technical product realization (TPR).A list of organizations represented on this comm
4、ittee 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. Amendments issued since publicationAmd. No. Date Commentsresponsible for its conversion to an international st
5、andard. A review of this publication will be initiated not later than 3 years after its publication by the international organization so that a decision can be taken on its status. Notification of the start of the review period will be made in an announcement in the appropriate issue of Update Stand
6、ards.According to the replies received by the end of the review period, the responsible BSI Committee will decide whether to support the conversion into an international Standard, to extend the life of the Technical Specification or 6National forewordThis Draft for Development is the UK implementati
7、on of ISO/TS 23165:2006.This publication is not to be regarded as a British Standard.It is being issued in the Draft for Development series of publications and is of a provisional nature. It should be applied on this provisional basis, so that information and experience of its practical application
8、can be obtained.Comments arising from the use of this Draft for Development are requested so that UK experience can be reported to the international organization Reference numberISO/TS 23165:2006(E)TECHNICAL SPECIFICATION ISO/TS23165First edition2006-07-15Geometrical product specifications (GPS) Gui
9、delines for the evaluation of coordinate measuring machine (CMM) test uncertainty Spcification gomtrique des produits (GPS) Lignes directrices pour lestimation de lincertitude dessai des machines mesurer tridimensionnelles (MMT) DD ISO/TS 23165:2006ii iiiContents Page Foreword iv Introduction v 1 Sc
10、ope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 General. 2 5 Test probing error. 3 6 Test of size 3 6.1 General. 3 6.2 Analysis of the uncertainty contributors 4 6.3 Graphical representation of the test results 6 Annex A (normative) Background and more detailed information . 8 Annex
11、B (normative) Using an alternative material standard of size . 20 Annex C (informative) Examples of uncertainty budgeting. 21 Annex D (informative) Relation to the GPS matrix model 30 Bibliography . 31 DD ISO/TS 23165:2006iv Foreword ISO (the International Organization for Standardization) is a worl
12、dwide 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 technical committee has been established has the right to be represented on
13、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 electrotechnical standardization. International Standards are drafted i
14、n accordance with the rules given in the ISO/IEC Directives, Part 2. The main 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
15、 requires approval by at least 75 % of the member bodies casting a vote. In other circumstances, particularly when there is an urgent market requirement for such documents, a technical committee may decide to publish other types of normative document: an ISO Publicly Available Specification (ISO/PAS
16、) represents an agreement between technical experts in an ISO working group and is accepted for publication if it is approved by more than 50 % of the members of the parent committee casting a vote; an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical co
17、mmittee and is accepted for publication if it is approved by 2/3 of the members of the committee casting a vote. An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a further three years, revised to become an International Standard, or withdrawn. If
18、 the ISO/PAS or ISO/TS is confirmed, it is reviewed again after a further three years, at which time it must either be transformed into an International Standard or be withdrawn. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO
19、 shall not be held responsible for identifying any or all such patent rights. ISO/TS 23165 was prepared by Technical Committee ISO/TC 213, Dimensional and geometrical product specifications and verification. DD ISO/TS 23165:2006vIntroduction This Technical Specification belongs to the general Geomet
20、rical product specification (GPS) series of documents (see ISO/TR 14638). It influences chain link 5 of the chains of standards on size, distance, radius, angle, form, orientation, location, run-out and datums in the general GPS matrix. For more detailed information about the relationship of this Te
21、chnical Specification to other standards and to the GPS matrix model, see Annex D. ISO 10360-2 deals with the application of the ISO 14253-1 decision rule, which proves conformance or non-conformance of a coordinate measuring machine (CMM) that is accepted or re-verified with its specification. In t
22、urn, this decision rule is based on a statement of the measurement uncertainty incurred while testing, and hence requires a full evaluation of the test uncertainty. This uncertainty expresses how accurate the test is, and hence how narrow the safety margins need to be set in order to make a rational
23、 decision at a specified confidence level. Usual practice in CMM measurement familiarizes metrologists and practitioners with measurement uncertainty. Any possible effect which may affect the measurement result is considered and quantified as an uncertainty contributor, and eventually summed up to a
24、chieve the combined uncertainty. The purpose of the measurement is to gather quantitative information on a given measurand, and the uncertainty statement expresses how reliable that information is. In the case of a performance test of a CMM, the purpose of the measurement is to investigate the CMMs
25、performance rather than the form or size of a material standard, which is calibrated and therefore well-known in advance. The uncertainty being evaluated in this case quantifies how accurate the test is. The test detects the quality of the CMM by comparing the measurement test values with the known
26、calibrated values of the material standards of size (probing error, P, or error of indication, E), and not through the uncertainty statement. Consequently, only those uncertainty components that pertain to the test itself are included in the test uncertainty budget as contributors. In particular, in
27、strumental errors introduced by the CMM are not included in the budget. In total, they constitute the probing error, P, or the error of indication, E, but do not compromise the test reliability and hence are not contributors to the test uncertainty. From a different viewpoint, the ISO 14253-1 princi
28、ple is that it is always the person performing the measurement who is liable for the uncertainty, whether in proving conformance or non-conformance. In other words, the tester is responsible for any imperfection which may occur during the test, and he takes this into account in terms of test uncerta
29、inty. A corollary of this is that the tester should only be held accountable for the elements under his responsibility, i.e. only these elements should be included in the test uncertainty budget. As the ISO 10360-2 test is not necessarily performed by the CMM manufacturer, the tester does not have a
30、ny responsibility for the CMM instrumental errors. For example, a purchaser may want to prove that a CMM with large errors falls outside specification; if the CMM errors were to be considered in the budget, the resulting test uncertainty would be so large that it probably could not prove anything at
31、 all. When the test is performed by a CMM manufacturer, the latter, as the tester, takes responsibility for any imperfection in the test implementation with the test uncertainty which narrows the acceptance zone , and, as the manufacturer, takes responsibility for any imperfection of the CMM regardi
32、ng any large values of the probing error, P, and error of indication, E. DD ISO/TS 23165:2006blankDD ISO/TS 23165:20061Geometrical product specifications (GPS) Guidelines for the evaluation of coordinate measuring machine (CMM) test uncertainty 1 Scope This Technical Specification gives guidance for
33、 the application of the test described in ISO 10360-2, by explaining the evaluation of the test uncertainty required for ISO 14253-1. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies
34、. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1:2002, Geometrical Product Specifications (GPS) Standard reference temperature for geometrical product specification and verification ISO 3650:1998, Geometrical Product Specifications (GP
35、S) Length standards Gauge blocks ISO 10360-1:2000, Geometrical Product Specifications (GPS) Acceptance and reverification tests for coordinate measuring machines (CMM) Part 1: Vocabulary ISO 10360-2:2001, Geometrical Product Specifications (GPS) Acceptance and reverification tests for coordinate mea
36、suring machines (CMM) Part 2: CMMs used for measuring size ISO 14253-1:1998, Geometrical Product Specifications (GPS) Inspection by measurement of workpieces and measuring equipment Part 1: Decision rules for proving conformance or non-conformance with specifications ISO/TS 14253-2:1999, Geometrical
37、 Product Specifications (GPS) Inspection by measurement of workpieces and measuring equipment Part 2: Guide to the estimation of uncertainty in GPS measurement, in calibration of measuring equipment and in product verification ISO 14660-1:1999, Geometrical Product Specifications (GPS) Geometrical fe
38、atures Part 1: General terms and definitions ISO/TS 17450-2:2002, Geometrical product specifications (GPS) General concepts Part 2: Basic tenets, specifications, operators and uncertainties International vocabulary of basic and general terms in metrology (VIM), BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OI
39、ML, 2nd ed., 1993 Guide to the expression of uncertainty in measurement (GUM), BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OIML, 1993, corrected and reprinted in 1995 DD ISO/TS 23165:20062 3 Terms and definitions For the purpose of this Technical Specification, the definitions given in ISO 10360-1, ISO 1466
40、0-1, ISO 14253-1, ISO/TS 17450-2, VIM and the following apply. 3.1 test uncertainty expanded uncertainty, U, associated solely with the testing equipment and its use in the test, which modifies the conformance and non-conformance zones, in accordance with the decision rule in ISO 14253-1 NOTE 1 Test
41、 uncertainty is a measure of the quality of the testing equipment and its use in the test. It is not a measure of CMM performance, which is determined from probing error, P, and error of indication for size measurement, E. NOTE 2 Test uncertainty is controlled by and is the responsibility of the tes
42、ter, who provides and uses the test equipment and suffers a reduced conformance or non-conformance zone in the case of a large test uncertainty. 3.2 tester party who performs the test defined in the ISO 10360-2 NOTE 1 In an acceptance test, the tester can be either the supplier or the customer, poss
43、ibly represented by a third party. NOTE 2 In a reverification test, the tester is the user, possibly represented by a third party. NOTE 3 The tester is always responsible for the test uncertainty. 3.3 tester counterpart party other than the tester NOTE 1 In an acceptance test, the tester counterpart
44、 can be either the customer or the supplier, possibly represented by a third party. NOTE 2 In a reverification test, the tester counterpart is the user himself, possibly represented by a third party. 3.4 coefficient of thermal expansion CTE material standard of size coefficient of thermal expansion
45、of a material at 20 C NOTE For the purpose of this Technical Specification, only the CTE of the material standard of size is considered. 4 General This Technical Specification provides simplified equations for the test uncertainty of the quantities tested in accordance with ISO 10360-2 (i.e. the pro
46、bing error, P, and the error of indication, E), and is intended as a quick reference for application. More detailed information is given in Annex A, which provides the general error models from which the simplified equations are derived, as well as some discussion of the nature of each uncertainty c
47、omponent, guidance on how to keep it to a minimum, and how to estimate its input uncertainty. In addition, possible uncertainty contributors are listed. Even if the main body alone may suffice for day-to-day use, a careful reading of Annex A is recommended for background information, as well as for
48、typical applications. The simplified equations for test uncertainty, which are given in this Technical Specification for the main uncertainty contributors, are representative in most common circumstances. They are, however, limited to these circumstances and may be inadequate in a particular case. A
49、 careful analysis of the actual circumstances is recommended in order to ascertain whether a given contributor listed in Annex A is in fact negligible, or not. DD ISO/TS 23165:20063Once the combined standard uncertainties u(P) or u(E) are evaluated in accordance with the simplified equations, the expanded uncertainty U(P) or U(E) are obtained through multiplication by a coverage factor, k, as follows: U(P) = k u(P) (1) and U(E) = k u(E) (2) The value k = 2 shall be used. Annex B deals with the
