ISO/TR TECHNICAL REPORT 230-8 Second edition 2010-06-01 Test code for machine tools - Part 8: Vibrations Code d'essai des machines-outils - Partie 8: Vibrations Reference number ISO/TR 230-8:2010(E) @ISO 2010 ISO/TR230-8:2010(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below COPYRIGHTPROTECTEDDOCUMENT ISO2010 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, isO's member body in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ Iso 2010 - All rights reserved ISO/TR 230-8:2010(E) Contents Page Foreword Introduction ..vii 1 Scope 2 Normative references.. 3 Terms and definitions 4 Theoretical background to the dynamic behaviour of machine tools 13 4.1 Nature of vibration: basic concepts ... 13 4.2 Single-degree-of-freedom systems ... 16 4.3 Mathematical considerations......... 4.4 Graphical representations ... 22 4.5 Different types of harmonic excitation and response .... 26 4.6 33 4.7 Other miscellaneous types of excitation and response of machine tools ... 4.8 Spectra, responses and bandwidth.... 43 5 Types of vibration and their causes. .44 5.1 Vibrations occurring as a result of unbalance .. 44 5.2 Vibrations occurring through the operation of linear slides .... 5.3 Vibrations occurring externally to the machine... ..49 5.4 Vibrations initiated by the machining process: forced vibration and chatter ... 50 5.5 9 Practical testing: general concepts. 54 6.1 6.2 Measurement of vibration values .. .54 6.3 Instrumentation.. 55 6.4 Relative and absolute measurements ...... 56 6.5 Units and parameters.... .56 6.6 Uncertainty of measurement 58 6.7 Note on environmental vibration evaluation ... 58 6.8 Type testing .... 6.9 Location of machine. .59 7 Practical testing: specific applications . 7.1 Unbalance.. .60 7.2 Machine slide acceleration along its axis (inertial cross-talk).. 64 7.3 Vibrations occurring externally to the machine... 7.4 Vibrations occurring through metal cutting .... 8 Practical testing: structural analysis through artificial excitation .... .68 8.1 General ..... 68 8.2 Spectrum analysis and frequency response testing .. 8.3 Machine set-up conditions .... 8.4 Frequency analysis ... 8.5 Modal analysis ... 73 8.6 Cross-response tests.... 8.7 "Non-standard" vibration modes 75 8.8 Providing standard stability tests.... 76 Annex A (informative) Overview and structure of this part of isO 230.... 77 Annex B (informative) Relationships between vibration parameters. 78 ISO 2010 - All rights reserved ili ISO/TR 230-8:2010(E) Annex C (informative) Summary of basic vibration theory.... Annex D (informative) Spindle and motor balancing protocol, Annex E (informative) Examples of test results and their presentation.. Annex F (informative) Instrumentation for analysis of machine tool dynamic behaviour ...... iv @ ISO 2010 - All rights reserved ISO/TR230-8:2010(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeer non-governmental, in liaiso