BS PD ISO TS 17865-2016 Geometrical product specifications (GPS) Guidelines for the evaluation of coordinate measuring machine (CMM) test uncertainty for CMMs using single and mult.pdf

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1、PD ISO/TS 17865:2016 Geometrical product specifications (GPS) Guidelines for the evaluation of coordinate measuring machine (CMM) test uncertainty for CMMs using single and multiple stylus contacting probing systems BSI Standards Publication WB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06PD

2、 ISO/TS 17865:2016 PUBLISHED DOCUMENT National foreword This Published Document is the UK implementation of ISO/TS 17865:2016. The UK participation in its preparation was entrusted to Technical Committee TDW/4, Technical Product Realization. A list of organizations represented on this committee can

3、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. The British Standards Institution 2016. Published by BSI Standards Limited 2016 ISBN 978 0 580 78868 0 ICS 17.040.01 Co

4、mpliance with a British Standard cannot confer immunity from legal obligations. This Published Document was published under the authority of the Standards Policy and Strategy Committee on 30 September 2016. Amendments/corrigenda issued since publication Date T e x t a f f e c t e dPD ISO/TS 17865:20

5、16 ISO 2016 Geometrical product specifications (GPS) Guidelines for the evaluation of coordinate measuring machine (CMM) test uncertainty for CMMs using single and multiple stylus contacting probing systems Spcification gomtrique des produits (GPS) Lignes directrices pour lestimation de lincertitude

6、 dessai des machines mesurer tridimensionnelles (MMT) pour MMT utilisant des systmes de palpage stylet simple et stylets multiples TECHNICAL SPECIFICATION ISO/TS 17865 Reference number ISO/TS 17865:2016(E) First edition 2016-08-15PD ISO/TS 17865:2016ISO/TS 17865:2016(E)ii ISO 2016 All rights reserve

7、d COPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intra

8、net, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.or

9、g www.iso.orgPD ISO/TS 17865:2016ISO/TS 17865:2016(E)Foreword iv Introduction v 1 Scope . 1 2 Normative references 1 3 Terms and definitions . 1 4 Test value uncertainty evaluation 2 4.1 Effects of fixturing and bending of the test sphere stem 2 4.2 Form of the test sphere 2 4.3 Test of the probing

10、system form error 2 4.4 Test of the probing system size value 3 4.5 Test of the probing system location value . 4 Annex A (informative) Using roundness to approximate form . 5 Annex B (informative) Relation to the GPS matrix model 7 Bibliography 8 ISO 2016 All rights reserved iii Contents PagePD ISO

11、/TS 17865:2016ISO/TS 17865:2016(E) Foreword 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 in

12、terested 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-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechni

13、cal Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO do

14、cuments should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention 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 respon

15、sible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given

16、for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following

17、URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 213, Dimensional and geometrical product specifications and verification.iv ISO 2016 All rights reservedPD ISO/TS 17865:2016ISO/TS 17865:2016(E) Introduction This Technical Specification is a geometrical

18、product specification (GPS) document and is to be regarded as a general GPS document (see ISO 14638). It influences chain links F of the chain of standards in the general GPS matrix model. For more detailed information of the relation of this Technical Specification to the GPS matrix model, see Anne

19、x B. The ISO GPS Matrix Model given in ISO 14638 gives an overview of the ISO GPS system of which this Technical Specification is a part. The fundamental rules of ISO GPS given in ISO 8015 apply to this Technical Specification. The default decision rules given in ISO 14253-1 apply to specifications

20、made in accordance with this Technical Specification, unless otherwise stated. This Technical Specification gives guidance for the evaluation of the test value uncertainty as required by the application of ISO 10360-5. Before starting any test value uncertainty evaluation, it is recommended that the

21、 distinction between the test value uncertainty and the measurement uncertainty is fully understood (the former is used to reduce the acceptance zone in a test, the latter to quantify the reliability of a measurement value) and the principle of the testers responsibility in deciding whether or not t

22、o include an uncertainty component in the budget is also understood. Some details of the above issues are given in ISO/TS 23165, the careful reading of which is recommended. ISO 2016 All rights reserved vPD ISO/TS 17865:2016PD ISO/TS 17865:2016Geometrical product specifications (GPS) Guidelines for

23、the evaluation of coordinate measuring machine (CMM) test uncertainty for CMMs using single and multiple stylus contacting probing systems 1 Scope This Technical Specification describes how to evaluate the test value uncertainty when testing is performed according to ISO 10360-5. 2 Normative referen

24、ces The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO

25、 10360-1, Geometrical Product Specifications (GPS) Acceptance and reverification tests for coordinate measuring machines (CMM) Part 1: Vocabulary ISO 10360-5:2010, Geometrical product specifications (GPS) Acceptance and reverification tests for coordinate measuring machines (CMM) Part 5: CMMs using

26、single and multiple stylus contacting probing systems ISO 14253-1: 1) , Geometrical product specifications (GPS) Inspection by measurement of workpieces and measuring equipment Part 1: Decision rules for proving conformity or nonconformity with specifications ISO 17450-2, Geometrical product specifi

27、cations (GPS) General concepts Part 2: Basic tenets, specifications, operators, uncertainties and ambiguities ISO/TS 23165, Geometrical product specifications (GPS) Guidelines for the evaluation of coordinate measuring machine (CMM) test uncertainty ISO/IEC Guide 98-3, Uncertainty of measurement Par

28、t 3: Guide to the expression of uncertainty in measurement (GUM:1995) ISO/IEC Guide 99, International vocabulary of metrology Basic and general concepts and associated terms (VIM) 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 10360-1, ISO 10360-5,

29、ISO 14253-1, ISO 17450-2, ISO/TS 23165, ISO/IEC Guide 98-3 and ISO/IEC Guide 99 apply. 1) To be published. (Revision of ISO 14253-1:2013) TECHNICAL SPECIFICATION ISO/TS 17865:2016(E) ISO 2016 All rights reserved 1PD ISO/TS 17865:2016ISO/TS 17865:2016(E) 4 Test value uncertainty evaluation 4.1 Effect

30、s of fixturing and bending of the test sphere stem The following contributors may be relevant in some applications. Fixturing of the test sphere: if the test sphere is fixtured loosely or vibrations are present, the test sphere may shift during the measurements, due to, for example, probing forces,

31、vibrations and inertial forces. Bending of the test sphere stem: if the test sphere stem is insufficiently rigid, the bending due to probing forces may be a significant source of test value uncertainty. The influence of these effects can be measured using a displacement sensor (such as a precision i

32、ndicator or capacitance gauge) when a force equivalent to the probing force (i.e., the force at the instant of point detection) is applied to the test sphere. The distance of this displacement is called d for the purposes of this Technical Specification. Alternatively, two significantly different pr

33、obing forces can be used to calculate the P values and then compared in order to assess these fixturing effects. 4.2 Form of the test sphere The formulae that follow in the rest of Clause 4 make use of the form and the uncertainty of the form of the test sphere, which, according to ISO 10360-5:2010,

34、 6.2.3, is to have been calibrated (the form of the test sphere is the same as its sphericity). It is the form of the test sphere (and not the roundness) that is to be calibrated. However, if the roundness of the sphere is calibrated instead of using traces about great circles of the sphere, then, u

35、pon agreement of buyer and seller, the roundness calibrations may be used to estimate the form and its uncertainty by using the adjustment factors as given in Annex A. 4.3 Test of the probing system form error The recommended formula for the standard uncertainty of the probing error u(P F- ) is Form

36、ula (1): (1) whereF is the form of the test sphere; is the standard uncertainty in the form of the test sphere stated in the calibration certificate;d is the displacement due to the probing force. The one-sided nature of this test means that the typical 95 % confidence level is achieved with a cover

37、age factor of k = 1,645 instead of the usual k = 2 (the default value given in ISO 14253-1:, Clause 4), which applies to two-sided distributions.2 ISO 2016 All rights reservedPD ISO/TS 17865:2016ISO/TS 17865:2016(E) The standard uncertainty, u, for the form calibration is found by dividing the expan

38、ded uncertainty U reported in the form calibration certificate by the coverage factor k, u = U/k; the value of k is also reported in the certificate. NOTE The above standard uncertainty formula for u(P F- ) can be an overestimate (see ISO 14253-2) due to the unknown, complex interaction between the

39、form of the test sphere with the error behaviour during probing. This overestimation is not problematic for many cases, but in some cases can be problematic when the form of an available and/or affordable test sphere is not sufficiently small in comparison with the maximum permissible limit of the P

40、 F-value. In this case, the buyer and seller might agree on an acceptable way to proceed, considering possibilities such as the following: a different decision rule may be agreed upon based on ISO/TR 14253-6; a technically correct, more detailed formula for the test value uncertainty is obtained. 4.

41、4 Test of the probing system size value The recommended formula for the standard uncertainty of the error of indication u(P S- ) is Formula (2): (2) whereD is the calibrated diameter of the test sphere; is the standard uncertainty in the calibrated diameter of the test sphere; is the CTE of the test

42、 sphere material;u is the standard uncertainty in the CTE of the test sphere material;T is the temperature of the test sphere minus 20 C; is the standard uncertainty of the temperature of the test sphere;F is the form of the test sphere; is the standard uncertainty in the form of the test sphere sta

43、ted in the calibration certificate; d is the displacement due to the probing force. ISO 2016 All rights reserved 3PD ISO/TS 17865:2016ISO/TS 17865:2016(E) 4.5 Test of the probing system location value The recommended formula for the standard uncertainty of the location value u(P L- ) is Formula (3):

44、 (3) whereF is the form of the test sphere; is the standard uncertainty in the form of the test sphere stated in the calibration certificate;d is the displacement due to the probing force.4 ISO 2016 All rights reservedPD ISO/TS 17865:2016ISO/TS 17865:2016(E) Annex A (informative) Using roundness to

45、approximate form A.1 Problem and proposed solution The formulae given in this Technical Specification make use of the form of the test sphere along with the uncertainty in the form. Practically, many test spheres are calibrated for roundness rather than form. That is, the roundness is measured for e

46、ach of a number of great circles traced out on the surface of the sphere, and the largest of these is reported as a representation of the form. In this case, one cannot directly use the formula, since the form is not fully captured by the roundness. The purpose of Annex A is to provide guidance in t

47、his situation. Two common patterns arising for imperfections in a sphere are a four-lobed form (where the lobes are centred at the vertices of a regular, inscribed tetrahedron) and a two-lobed form (a prolate spheroid). For these cases, simulation studies were performed to ascertain what fraction of

48、 the form is captured when measuring the roundness on great circles (the orientation of the form pattern was randomized through the simulation). Adjustment factors have been computed and reported here to adjust from roundness to form (using the worse of the four-lobed and two-lobed cases). While this approach admittedly falls short of all th