ISO-10791-5-1998.pdf
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1、A Reference number ISO 10791-5:1998(E) INTERNATIONAL STANDARD ISO 10791-5 First edition 1998-03-01 Test conditions for machining centres Part 5: Accuracy and repeatability of positioning of work-holding pallets Conditions dessai pour centres dusinage Partie 5: Prcision et rptabilit de positionnement
2、 des palettes porte-pices ISO 10791-5:1998(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 publis
3、her. International Organization for Standardization Case postale 56 CH-1211 Genve 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 3Preliminary remarks .2 3.1Measuring units .2 3.2Reference t
4、o ISO 230-1 and ISO 230-2 2 3.3Axes coding .2 3.4Tests to be performed .2 3.5Measuring instruments 3 4Repeatability of positioning of individual pallets on the machine .3 4.1Location of instruments .3 4.2Measurement procedure .3 4.3Formulae for calculating the deviations from individual readings .4
5、4.4Tolerances 4 4.5Checking and measuring instruments .4 4.6Reference to ISO 230-2 5 4.7Measured deviations .5 5Positioning accuracy of a batch of pallets relative to a pallet receiver .6 5.1Location of instruments .6 5.2Formulae for calculating the deviations from individual readings .6 5.3Toleranc
6、es 6 5.4Checking and measuring instruments .6 5.5Reference to ISO 230-2 6 5.6Measured deviations .6 Annex A (informative) Bibliography .8 -,-,- ISOISO 10791-5:1998(E) iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO mem
7、ber 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, governmen
8、tal 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 mem
9、ber bodies for voting. Publication as an International Standard requires approval by at least 75% of the member bodies casting a vote. International Standard ISO 10791-5 was prepared by Technical Committee ISO/TC 39, Machine tools, Subcommittee SC 2, Test conditions for metal cutting machine tools.
10、ISO 10791 consists of the following parts, under the general title Test conditions for machining centres: Part 1: Geometric tests for machines with horizontal spindle and with accessory heads (horizontal Z axis) Part 2: Geometric tests for machines with vertical spindle or universal heads with verti
11、cal primary rotary axis (vertical Z axis) Part 3: Geometric tests for machines with integral universal heads with horizontal primary rotary axis (vertical Z axis) Part 4: Accuracy and repeatability of positioning of linear and rotary axes Part 5: Accuracy and repeatability of positioning of work-hol
12、ding pallets Part 6: Accuracy of feeds, speeds and interpolations Part 7: Accuracy of a finished test piece Part 8: Evaluation of contouring performance in the three coordinate planes Part 9: Evaluation of the operating times of tool change and pallet change Part 10: Evaluation of the thermal distor
13、tions Part 11: Evaluation of the noise emission Part 12: Evaluation of the vibration severity Annex A of this part of ISO 10791 is for information only. -,-,- ISO 10791-5:1998(E) ISO iv Introduction A machining centre is a numerically controlled machine tool capable of performing multiple machining
14、operations, including milling, boring, drilling and tapping, as well as automatic tool changing from a magazine or similar storage unit in accordance with a machining programme. The object of ISO 10791 is to supply information as wide and comprehensive as possible on tests which can be carried out f
15、or comparison, acceptance, maintenance or any other purpose. ISO 10791 specifies, with reference to the relevant parts of ISO 230, Test code for machine tools, several families of tests for machining centres with horizontal or vertical spindle or with universal heads of different types, standing alo
16、ne or integrated in flexible manufacturing systems. ISO 10791 also establishes the tolerances or maximum acceptable values for the test results corresponding to general purpose and normal accuracy machining centres. ISO 10791 is also applicable, totally or partially, to numerically controlled millin
17、g and boring machines, when their configuration, components and movements are compatible with the tests described herein. -,-,- INTERNATIONAL STANDARD ISOISO 10791-5:1998(E) 1 Test conditions for machining centres Part 5: Accuracy and repeatability of positioning of work-holding pallets 1Scope This
18、part of ISO 10791 specifies, with reference to ISO 230-1 and ISO 230-2, the tests intended to assess the repeatability of positioning of individual pallets and the total accuracy of positioning of a batch of pallets associated with a specific machine. In a manufacturing system the accuracy of positi
19、oning of a workpiece or a work-holding fixture depends on the fitting between pallets and receivers. It should be noted that this part of ISO 10791 applies to a single machining centre, i.e. to the single receiver, with multiple pallets. The results of the tests considered here could be extended to
20、the whole manufacturing system only if the measuring instruments were placed on the different machines exactly in the same position with respect to the origins of the linear axes. This, in practice, is difficult and inaccurate, because origins of the linear axis are affected by the repeatability of
21、the axes. 2Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 10791. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on
22、this part of ISO 10791 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 230-1:1996, Test code for machine tools Part 1: Geometric accuracy of
23、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 8526-1:1990, Modular units for machine tools Workholding pallets Part 1: Workholding pallets up
24、 to 800 mm nominal size. ISO 8526-2:1990, Modular units for machine tools Workholding pallets Part 2: Workholding pallets of nominal size greater than 800 mm. -,-,- ISO 10791-5:1998(E) ISO 2 3Preliminary remarks 3.1Measuring units In this part of ISO 10791, all linear dimensions, deviations and corr
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