ISO-6155-1998.pdf

A Reference number ISO 6155:1998(E) INTERNATIONAL STANDARD ISO 6155 First edition 1998-03-15 Machine tools Test conditions for horizontal spindle turret and single spindle automatic lathes Testing of the accuracy Machines-outils Conditions d'essai des tours à tourelle revolver à broche horizontale et des tours automatiques monobroche Contrôle de la précision Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 19:44:11 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 6155:1998(E) © ISO 1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 CH-1211 Genève 20 Switzerland Internetcentraliso.ch X.400c=ch; a=400net; p=iso; o=isocs; s=central Printed in Switzerland ii ContentsPage 1Scope 1 2Normative references 1 3Definitions .2 4Machine size range .8 5Preliminary remarks 8 5.1Measuring units 8 5.2Reference to ISO 230-1 .8 5.3Testing sequence .8 5.4Tests to be performed 9 5.5Measuring instruments .9 5.6Machining tests 9 5.7Machine levelling 9 6Geometric tests .10 6.1Work spindle 10 6.2Slide bases .14 6.3Turret .16 7Machining tests .25 8Testing of accuracy and repeatability of positioning by numerical control .28 Annex A (informative) Bibliography 30 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 19:44:11 MDTNo reproduction or networking permitted without license from IHS -,-,- © ISOISO 6155:1998(E) iii 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 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 closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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. International Standard ISO 6155 was prepared by Technical Committee ISO/TC 39, Machine tools, Subcommittee SC 2, Test conditions for metal cutting machine tools. This first edition of ISO 6155 cancels and replaces ISO 6155-1:1981 and ISO 6155-2:1986 which have been combined in this technical revision. Annex A of this International Standard is for information only. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 19:44:11 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 6155:1998(E) © ISO iv Introduction ISO/TC 39/SC 2 recognized the fact that machines described in this International Standard represent obsolescent technology. Nevertheless, there is no Standard available for machines that represent current technology. Therefore, ISO/TC 39/SC2 responded to the request for revision of this Standard by combining ISO 6155 parts 1 and 2 into a single standard and adding positioning tests. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 19:44:11 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD © ISOISO 6155:1998(E) 1 Machine tools Test conditions for horizontal spindle turret and single spindle automatic lathes Testing of the accuracy 1 Scope This International Standard describes, with reference to ISO 230-1 and ISO 230-2, geometric tests, machining tests and tests for accuracy and repeatability of numerically-controlled positioning axes on general purpose and normal accuracy turret and single spindle automatic lathes. It also specifies the applicable tolerances corresponding to the above-mentioned tests. This International Standard applies only to lathes with a multi-tool turret. This turret can be manually indexed, semi-automatically indexed by motion of the turret slide or automatically indexed by an independent control including numerical control. Lathes with sliding headstock are excluded from the scope, but lathes with numerical control are included as far as the contents of this International Standard are applicable. This International Standard deals only with the verification of accuracy of the machine. It does not apply to the operational testing of the machine (vibration, abnormal noise, stick-slip motion of components, etc.) nor to machine characteristics (such as speeds, feeds, etc.) as such checks are generally carried out before testing the accuracy. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 68-1:1), ISO general purpose screw threads Basic profile Part 1: Metric screw threads. ISO 230-1:1996, Test code for machine tools Part 1: Geometric accuracy of machines operating under no-load or finishing conditions. ISO 230-2:1997, Test code for machine tools Part 2: Determination of accuracy and repeatability of positioning of numerically controlled axes. ISO 1101: 2), Geometrical Product Specifications (GPS) Geometrical tolerancing Generalities, definitions, symbols, indication on drawings. ISO 3442:1991, Self-centring chucks for machine tools with two-piece jaws (tongue and groove type) Sizes for interchangeability and acceptance test specifications. _ 1) To be published. (Partial revision of ISO 68:1973) 2) To be published. (Revision of ISO 1101:1983) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 19:44:11 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 6155:1998(E) © ISO 2 3 Definitions Some possible machine architectures referred to this International Standard are given in the following figures. Key 1 Indexable turret4 Bed 2 Small slide5 Fixed headstock 3 Saddle with manual operation6 Spindle axis Figure 1 Capstan Lathe Key 1 Turret4 Fixed headstock 2 Saddle5 Spindle axis 3 Bed Figure 2 Turret lathe Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 19:44:11 MDTNo reproduction or networking permitted without license from IHS -,-,- © ISO ISO 6155:1998(E) 3 Key 1 Indexing turret5 Bed 2 Saddle of turret6 Fixed headstock 3 Small turret or tool holder7 Spindle axis 4 Cross-slide saddle Figure 3 Combination turret lathe Key 1 Indexing turret4 Bed 2 Turret holder slide5 Fixed headstock 3 Saddle6 Spindle axis Figure 4 Cross-feeding turret lathe Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 19:44:11 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 6155:1998(E) © ISO 4 Key 1 Indexing turret4 Independent cross-slides 2 Turret holder saddle5 Fixed headstock 3 Bed6 Spindle axis Figure 5 Single spindle automatic lathe Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 19:44:11 MDTNo reproduction or networking permitted without license from IHS -,-,- © ISO ISO 6155:1998(E) 5 Key 1 Linear turret4 Bed 2 Cross slide5 Fixed headstock 3 Saddle Figure 6 Linear turret lathe Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 19:44:11 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 6155:1998(E) © ISO 6 All these types of lathe are manufactured with a variety of turret configurations. The most common types of configurations are designated types A, B, C (see figure 7) and D and are described below. Turret type A: Circular or multi-sided turret whose axis of rotation intersects the work spindle axis. Whether or not the turret axis is perpendicular to the work spindle axis, the axis of each turret bore must align with the work spindle axis in its working position. Tools may be located in the bore or recess, attached to the flat turret face or located and clamped in the bore itself. Turret type B: Multi-sided turret whose axis of rotation does not intersect the work spindle axis but is parallel or at a right angle to it. Special toolholders mounted and located on the turret sides (faces) are required. Turret type C: Circular (drum or disc type) turret whose axis of rotation is parallel to the work spindle axis. Tools are located in turret bores, which are parallel to the turret axis, and the turret axis is arranged so that the work spindle axis aligns with the axes of the turret bores in their working positions. Turret type D: Linear turret where tools are set on the cross slide. The necessary tool comes to the working position by the cross slide linear movement (see figure 6). Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 19:44:11 MDTNo reproduction or networking permitted without license from IHS -,-,- © ISO ISO 6155:1998(E) 7 Key 1 Spindle axis4 Turrets 2 Spindle5 Oblique turret axis 3 Perpendicular turret axis6 Parallel turret axis Figure 7 Different types of turret Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 19:44:11 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 6155:1998(E) © ISO 8 4 Machine size range The machines are classified into three ranges, on the basis of the criteria indicated in table 1. Table 1 Criteria and ranges CriteriaRange 0Range 1Range 2 Swing diameter over the bed 90o (Measured deviation) Measuring instruments Dial gauge and flat disc or straightedge Observations and references to ISO 230-15.522.3 The dial gauge is mounted on the cross-slide. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 19:44:11 MDTNo reproduction or networking permitted without license from IHS -,-,- © ISO ISO 6155:1998(E) 15 Object G6 Checking of the parallelism of the W-axis movement of the intermediate carriage to the work spindle axis: a) in a horizontal plane; b) in a vertical plane. Diagram Tolerance For all ranges a) 0,005 for a measuring length of 100 (free end of mandrel forward only) b)0,007 for a measuring length of 100 (free end of mandrel upward only) NOTE For Range 0 machines with a stroke of less than 100 mm, the tolerance remains the same. (Measured deviation) a) b) Measuring instruments Dial gauge and test mandrel Observations and references to ISO 230-15.422.3 The dial gauge is mounted on the cross-slide. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 19:44:11 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 6155:1998(E) © ISO 16 6.3 Turret Object G7 Checking of parallelism of the turret movement on the bed (Z-axis) to the work spindle axis: a) in a horizontal plane; b) in a vertical plane. (This test applies only to turret lathes.) Diagram ToleranceFor both a) and b) Range 0 0,01 for a measuring length of 150 Range 1 0,02 for a measuring length of 300 Range 2 0,02 for a measuring length of 300 NOTE For machines with a stroke of less than the above measuring lengths, tolerances remain the same. (Measured deviation) a)b) Measuring instruments Dial gauge and test mandrel Observations and references to ISO 230-15.422.3 Dial gauge is mounted on the turret. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 19:44:11 MDTNo reproduction or networking permitted without license from IHS -,-,- © ISO ISO 6155:1998(E) 17 Object G8 Checking of parallelism of the turret bores with the turret movement (Z-axis): a) in a horizontal plane; b) in a vertical plane. (This test does not apply to machines with turret type B or to those without tool shank clamping facilities.) Diagram Tolerance a) and b) Range 0 0,01 for a measuring length of 50 Range 1 and 2 0,015 for a measuring length of 100 (Measured deviation) a)b) Measuring instruments Dial gauge and test mandrel Observations and references to ISO 230-15.422.3 The test mandrel shall not be clamped in the turret but be a tight fit. Where the turret bores are relieved, the test mandrel shall be tightly clamped using the locking mechanism. The test shall be repeated for each turret bore. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 19:44:11 MDTNo reproductio