1、BSI Standards PublicationBS ISO 230-2:2014Test code for machine toolsPart 2: Determination of accuracy andrepeatability of positioning of numericallycontrolled axesCopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or netw
2、orking permitted without license from IHS-,-,-BS ISO 230-2:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 230-2:2014. Itsupersedes BS ISO 230-2:2006 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee MTE/1/2, Ma
3、chine tools - Accuracy.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Pu
4、blished by BSI StandardsLimited 2014ISBN 978 0 580 76002 0ICS 25.040.20; 25.080.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2014.Amendments issued s
5、ince publicationDate Text affectedCopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS ISO 230-2:2014 ISO 2014Test code for machine tools Part 2: Determination of accur
6、acy and repeatability of positioning of numerically controlled axesCode dessai des machines-outils Partie 2: Dtermination de lexactitude et de la rptabilit de positionnement des axes commande numriqueINTERNATIONAL STANDARDISO230-2Fourth edition2014-05-01Reference numberISO 230-2:2014(E)Copyright Bri
7、tish Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS ISO 230-2:2014ISO 230-2:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless o
8、therwise 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 intranet, without prior written permission. Permission can be requested from either ISO at the addre
9、ss below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandCopyright British Standards Institution Provided by IHS under license with BSI -
10、Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS ISO 230-2:2014ISO 230-2:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction vi1 Scope . 12 Normative references 13 Terms and definitions . 14 Test conditions . 64.1 Enviro
11、nment . 64.2 Machine to be tested 74.3 Warm-up. 75 Test programme 75.1 Mode of operation 75.2 Selection of target position. 85.3 Measurements . 86 Evaluation of the results 106.1 Linear axes up to 2 000 mm and rotary axes up to 360 .106.2 Linear axes exceeding 2 000 mm and rotary axes exceeding 360
12、.107 Points to be agreed between manufacturer/supplier and user .108 Presentation of results 118.1 Method of presentation 118.2 Parameters 12Annex A (informative) Measurement uncertainty estimation for linear positioning measurement Simplified method 19Annex B (informative) Step cycle .36Annex C (in
13、formative) Periodic positioning error 37Annex D (informative) Linear positioning error measurements using calibrated ball array or step gauge .40Bibliography .43Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or network
14、ing permitted without license from IHS-,-,-BS ISO 230-2:2014ISO 230-2:2014(E)ForewordISO (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
15、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-governmental, in liaison with ISO, also take part in the work. ISO collaborates clo
16、sely with the International Electrotechnical 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
17、needed for the different types of ISO documents 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 pat
18、ent rights. ISO shall not be held responsible 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 use
19、d in this document is information given 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 Bar
20、riers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 39, Machine tools, Subcommittee SC 2, Test conditions for metal cutting machine tools.This fourth edition cancels and replaces the third edition (ISO 230-2:2006), whi
21、ch has been technically revised. In particular, the following have been added:a) for axes lengths larger than 4 000 mm, more than one 2 000 mm segment(s) can be defined for testing (see 5.3.3);b) nomenclature for parameters of positioning tests, e.g. EXX,A(see 8.2.4);c) evaluation of periodic positi
22、oning errors (see Annex C);d) positioning tests with calibrated ball array or step gauge (see Annex D).ISO 230 consists of the following parts, under the general title Test code for machine tools: Part 1: Geometric accuracy of machines operating under no-load or quasi-static conditions Part 2: Deter
23、mination of accuracy and repeatability of positioning of numerically controlled axes Part 3: Determination of thermal effects Part 4: Circular tests for numerically controlled machine tools Part 5: Determination of the noise emission Part 6: Determination of positioning accuracy on body and face dia
24、gonals (Diagonal displacement tests) Part 7: Geometric accuracy of axes of rotation Part 8: Vibrations Technical Report Part 9: Estimation of measurement uncertainty for machine tool tests according to series ISO 230, basic equations Technical Reportiv ISO 2014 All rights reservedCopyright British S
25、tandards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS ISO 230-2:2014ISO 230-2:2014(E) Part 10: Determination of the measuring performance of probing systems of numerically controlled machi
26、ne tools Part 11: Measuring instruments suitable for machine tool geometry tests Technical Report ISO 2014 All rights reserved vCopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license fro
27、m IHS-,-,-BS ISO 230-2:2014ISO 230-2:2014(E)IntroductionThe purpose of ISO 230 (all parts) is to standardize methods for testing the accuracy of machine tools, excluding portable power tools.This part of ISO 230 specifies test procedures used to determine the accuracy and repeatability of positionin
28、g of numerically controlled axes. The tests are designed to measure the relative motion between the component of the machine that carries the cutting tool and the component that carries the workpiece.The manufacturer/supplier is responsible for providing thermal specifications for the environment in
29、 which the machine can be expected to perform with the specified accuracy. The machine user is responsible for providing a suitable test environment by meeting the manufacturer/suppliers thermal guidelines or otherwise accepting reduced performance. An example of environmental thermal guidelines is
30、given in ISO 230-3:2007, Annex C.A relaxation of accuracy expectations is required if the thermal environment causes excessive uncertainty or variation in the machine tool performance and does not meet the manufacturer/suppliers thermal guidelines. If the machine does not meet performance specificat
31、ions, the analysis of the uncertainty due to the compensation of the machine tool temperature, given in A.2.4 of this part of ISO 230, and the uncertainty due to the environmental variation error, given in A.2.5, can help in identifying sources of problems. ISO/TC 39/SC 2 decided to add the followin
32、g to this edition of this part of ISO 230:a) for axes lengths larger than 4 000 mm, more than one 2 000 mm segment(s) can be defined for testing (see 5.3.3);b) nomenclature for parameters of positioning tests, e.g. EXX,A(see 8.2.4);c) evaluation of periodic positioning errors (see Annex C);d) positi
33、oning tests with calibrated ball array or step gauge (see Annex D).vi ISO 2014 All rights reservedCopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS ISO 230-2:2014INT
34、ERNATIONAL STANDARD ISO 230-2:2014(E)Test code for machine tools Part 2: Determination of accuracy and repeatability of positioning of numerically controlled axes1 ScopeThis part of ISO 230 specifies methods for testing and evaluating the accuracy and repeatability of positioning of numerically cont
35、rolled machine tool axes by direct measurement of individual axes on the machine. These methods apply equally to linear and rotary axes.When several axes are simultaneously under test, the methods do not apply.This part of ISO 230 can be used for type testing, acceptance tests, comparison testing, p
36、eriodic verification, machine compensation, etc.The methods involve repeated measurements at each position. The related parameters of the test are defined and calculated. Their uncertainties are estimated as described in ISO/TR 230-9:2005, Annex C.Annex A presents the estimation of the measurement u
37、ncertainty.Annex B describes the application of an optional test cycle: the step cycle. The results from this cycle are not to be used either in the technical literature with reference to this part of ISO 230, nor for acceptance purposes, except under special written agreements between manufacturer/
38、supplier and user. Correct reference to this part of ISO 230 for machine acceptance always refers to the standard test cycle.Annex C contains considerations related to periodic positioning error.Annex D describes tests using ball array and step gauge.2 Normative referencesThe following documents, in
39、 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 230-1:2012, Test code for machi
40、ne tools Part 1: Geometric accuracy of machines operating under no-load or quasi-static conditionsISO 230-3:2007, Test code for machine tools Part 3: Determination of thermal effectsISO/TR 230-9:2005, Test code for machine tools Part 9: Estimation of measurement uncertainty for machine tool tests ac
41、cording to series ISO 230, basic equations3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1axis travelmaximum travel, linear or rotary, over which the moving component can move under numerical controlNote 1 to entry: For rotary axes exceeding 360
42、, there might not be a clearly defined maximum travel. ISO 2014 All rights reserved 1Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS ISO 230-2:2014ISO 230-2:2014(E
43、)3.2measurement travelpart of the axis travel, used for data capture, selected so that the first and the last target positions can be approached bi-directionallyNote 1 to entry: See Figure 1.3.3functional pointcutting tool centre point or point associated with a component on the machine tool where c
44、utting tool would contact the part for the purposes of material removalSOURCE: ISO 230-1:2012, 3.4.2Note 1 to entry: In this part of ISO 230, tests address errors in the relative motion between the component of the machine that carries the cutting tool and the component that carries the workpiece. T
45、hese errors are defined and measured at the position or trajectory of the functional point.3.4target positionPi (i = 1 to m)position to which the moving component is programmed to moveNote 1 to entry: The subscript i identifies the particular position among other selected target positions along or a
46、round the axis.3.5actual positionPij(i = 1 to m; j = 1 to n)measured position reached by the functional point on the jthapproach to the ithtarget position3.6positioning deviationdeviation of positionxijactual position reached by the functional point minus the target positionxij= Pij PiSOURCE: ISO 23
47、0-1:2012, 3.4.6, modifiedNote 1 to entry: Positioning deviations are determined as the relative motion between the component of the machine that carries the cutting tool and the component that carries the workpiece in the direction of motion of the axis under test.Note 2 to entry: Positioning deviat
48、ions constitute a limited representation of positioning error motion, sampled at discrete intervals.3.7unidirectionalrefers to a series of measurements in which the approach to a target position is always made in the same direction along or around the axisNote 1 to entry: The symbol signifies a parameter derived from a measurement made after an approach in the positive direction, and one in the negative direction, e.g. xij or xij.3.8bi-directionalrefers to a parameter derived from a series of measurements in which the approach to a target position i
