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1、INTERNATIONAL STANDARD IS0 10791 -611998 TECHNICAL CORRIGENDUM 1 Published 2004-04-01 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION M W A P O f l H A R OPTAHHIHR no CTAHflAPTHIAUHH ORGANISATION INTERNATIONALE DE NORMALISATION Test conditions for machining centres - Part 6: Accuracy of feeds, speeds
2、 and interpolations TECHNICAL CORRIGENDUM 1 Conditions dessai pour centres dusinage - Partie 6: Prcision des avances, vitesses et interpolations RECTIFICATIF TECHNIQUE I Technical Corrigendum 1 to IS0 10791 -6: 1998 was prepared by Technical Committee ISOTC 39, Machine tools, Subcommittee SC 2, Test
3、 conditions for metal cuffing machine tools. Page 9 Test K6 Replace the diagram with the following. L 6 fl CA aldlgl blfl aldlgl o ICs 25.040.10 Ref. No. IS0 10791-6:1998/Cor.l:2004(E) O IS0 2004 -All rights reserved Published in Switzerland STD-IS0 LU77L-b-ENGL 1778 4851703 0747332 878 D INTERNATIO
4、NAL STANDARD IS0 10791 -6 First edition 1998-07-01 Test conditions for machining centres - Part 6: Accuracy of feeds, speeds and interpolations Conditions dessai pour centres dusinage - Partie 6: Prcision des avances, vitesses et interpolations This material is reproduced from IS0 documents under In
5、ternational Organization for Standardization (ISO) Copyright License number IHSllCCl1996. Not for resale. No par6 of these IS0 documents may be reproduced in any form, electronic retrieval system or otherwise, except as allowed in the copyright law of the country of use, or with the prior written co
6、nsent of IS0 (Case postale 56,1211 Geneva 20, Switzerland, Fax +.BI 22 734 10 79), IHS or the IS0 Licensors members. Reference number IS0 10791-6:1998(E) -,-,- IS0 10791-6:1998(E) Contents Page 1 Scope 2 Normative references . 3 Preliminary remarks . 3.1 Measuring units 3 . 2 Reference to IS0 230-1
7、3 . 3 Testing sequence . 3.5 Measuring instruments . 3 . 6 Diagrams 4 Kinematic tests 4.1 Speeds (K 1) and feeds (K 2) . 4.2 Linear interpolation (K 3) 4.3 Circular interpolation (K 4) 4.4 Angular interpolation (K 5) 4.5 Spherical interpolation of five axes (K 6) Annex A (informative) Bibliography 3
8、.4 Tests to be performed . 1 1 1 1 2 2 2 2 2 2 2 2 2 3 3 10 O IS0 1998 Ali 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 writin
9、g from the publisher . International Organization for Standardization Case postale 56 CH-1 21 1 Genve 20 Switzerland internet so iso.ch Printed in Switzerland -,-,- - STD*ISO 10791-b-ENGL 1798 D 48517133 07L17334 b40 IS0 IS0 10791-6:1998(E) Foreword IS0 (the International Organization for Standardiz
10、ation) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be
11、 represented on that committee. International organizations, governmental and non- governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International
12、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 YO of the member bodies casting a vote. International Standard IS0 10791 -6 was prepared by Technical Committee ISOTTC 39, Machine t
13、ools, Subcommittee SC 2, Test conditions for metal cutting machine tools. IS0 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 accessoty heads (horizontal Z-axis) Part 2 : Geome
14、tric tests for machines with vertical spindle or universal heads with vertical primary rotary axis (vertical Z-axis) Part 3: Geometric tests for machines with integral indexable or continuous universal heads (vertical Z-axis) Part 4: Accuracy and repeatability of positioning of linear and rotary axe
15、s Part 5: Accuracy and repeatability of positioning of work-holding pallets Part 6: Accuracy of feeds, speeds and interpolations Part 7: Accuracy of a finished test piece Part 8: Evaluation of the contouring performance in the three coordinate planes Part9: Evaluation of the operating times of tool
16、change and pallet change Part 1 O: Evaluation of the thermal distortions Part 11: Evaluation of the noise emission Part 12: Evaluation of the vibration severity Annex A of this part of IS0 10791 is for information only. iii -,-,- STD-IS0 L077L-b-ENGL 1778 W 4851903 07q7335 587 IS0 1 0791 -6: 1 998(
17、E) 0 IS0 In trod uct ion A machining centre is a numerically controlled machine tool capable of performing multiple machining 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 program
18、me. The object of IS0 10791 is to supply information as wide and comprehensive as possible on tests which can be carried out for comparison, acceptance, maintenance or any other purpose. IS0 10791 specifies, with reference to the relevant parts of IS0 230, Test code for machine fools, several famili
19、es of tests for machining centres with horizontal or vertical spindle or with universal heads of different types, standing alone or integrated in flexible manufacturing systems. IS0 10791 also establishes the tolerances or maximum acceptable values for the test results corresponding to general purpo
20、se and normal accuracy machining centres. IS0 10791 is also applicable, totally or partially, to numerically controlled milling and boring machines, when their configuration, components and movements are compatible with the tests described herein. iv -,-,- STD*ISO 10791-b-ENGL 1998 Li851103 074733b
21、413 M INTERNATIONAL STANDARD 0 IS0 IS0 10791 -6: 1998(E) Test conditions for machining centres - Part 6: Accuracy of feeds, speeds and interpolations 1 Scope This part of IS0 10791 specifies, with reference to IS0 230-1, certain kinematic tests for machining centres, concerning the spindle speeds, t
22、he feeds of the individual NC linear axes and the accuracy of the paths described by the simultaneous movement of two or more NC linear and/or rotary axes (see clause 4). 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of
23、 this part of IS0 10791. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of IS0 10791 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below
24、. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 230-1:1996, Test code for machine tools - Part 1: Geometric accuracy of machines operating under no-load or finishing conditions. IS0 230-4:1996, Test code for machine tools - Fart 4: Circular tests for numer
25、ically controlled machine tools. 3 Preliminary remarks 3.1 Measuring units In this part of IS0 10791, all linear dimensions, deviations and corresponding tolerances are expressed in millimetres; angular dimensions are expressed in degrees, and angular deviations and the corresponding tolerances are
26、expressed in ratios but in some cases microradians or arc seconds may be used for clarification purposes. The equivalence of the following expressions should always be kept in mind: 0,010/1 O00 = 10 x = 10 prad = 2 1 -,-,- STD-IS0 10791-b-ENGL 1998 4851903 07Y9337 35T SO 10791-6:1998(E) IS0 3.2 Refe
27、rence to IS0 230-1 To apply this part of IS0 10791, reference shall be made to IS0 230-1, especially for the installation of the machine before testing, warming up of the spindle and other moving parts, description of measuring methods and recommended accuracy of testing equipment. 3.3 Testing seque
28、nce The sequence in which the kinematic tests are presented in this part of IS0 10791 in no way defines the practical order of testing. In order to make the mounting of instruments or gauging easier, tests may be applied in any order. 3.4 Tests to be performed When testing a machine, it is not alway
29、s necessary nor possible to carry out all the tests described in this part of IS0 10791. When the tests are required for acceptance purposes, it is up to the user to choose, in agreement with the supplier/manufacturer, those tests relating to the components and/or the properties of the machine which
30、 are of interest. These tests as well as the batch size to be used as a sample for the accuracy test are to be clearly stated when ordering a machine. Mere reference to this part of IS0 10791 for the acceptance tests, without specifying the tests to be carried out, and without agreement on the relev
31、ant expenses, cannot be considered as binding for any contracting party. 3.5 Measuring instruments The measuring instruments indicated in the relevant sections are examples only. Other instruments measuring the same quantities and having at least the same accuracy and the same resolution may be used
32、. Dial gauges shall have a resolution of 0,001 mm. 3.6 Diagrams For reasons of simplicity, the diagrams in this part of IS0 10791 illustrate only some types of machines. 4 Kinematic tests 4.1 Speeds (K 1) and feeds (K 2) The scope of these tests is to check the overall accuracy of all the electric,
33、electronic and kinematic chain in the control system between the command on the keyboard and the physical movement of the component. 4.2 Linear interpolation (K 3) The scope of this test is to check the coordinated motion of two linear axes while they are moving at the same feed rate (45“ angle) and
34、 to check the behaviour o f each one of them at very low feed rate (small angles), with the possible stick-slip motion. 4.3 Circular interpolation (K 4) The scope of this test is to check the coordinated motion of two linear axes (generally X and Y) at variable feed rates, including points in which
35、the feed of one axis slows down to zero and the direction of movement is reversed. 2 -,-,- 0 IS0 STD.ISO L0771-b-ENGL 2778 4853703 0747338 27b W IS0 10791 -6: 1998(E) 4.4 Angular interpolation (K 5) The scope of this test, applicable to the 45“ split universal heads, is to check the accuracy of a pa
36、rticular type of interpolation of the two rotary axes which allows, rotating axis D through 180“ and axis 6 through 90, to move the spindle from a vertical to a horizontal position, and/or vice versa, keeping it always parallel to the same plane. If the structure of the head allows it, the extension
37、 of the test may be doubled, bringing the angle described by the spindle axis in a vertical (or even horizontal) plane to 180“. 4.5 Spherical interpolation of five axes (K 6) The scope of this test, applicable to universal heads with two rotary axes (which can be perpendicular to each other or at 45
38、“), is to check the accuracy of circular paths described by the spindle nose on the surface of a sphere to which it is kept perpendicular. The test considered hereafter is limited to the upper front spherical octants, and involves the simultaneous movement of three axes at a time. It can anyway be e
39、xtended to longer or differently oriented arcs and to different octants depending on the architecture of the machine and of the head. 3 STDeISO 10771-b-ENGL 1778 4851703 0749337 122 a IS0 10791-6:1998(E) IS0 II Object 11 K I Ii Checking of deviations in the spindle speed at 50 % and 100 % of the max
40、imum speed of each range, clockwise and counter-clockwise directions of rotation. Diagram Tolerance *5% Measureddeviation Measuring instruments Revolutions counter or stroboscope or others Observations If the instantaneous speed is read, five readings shall be taken and the average calculated. Readi
41、ngs shal be taken at constant speed, avoiding the acceleration/deceleration at start and stop. The override contro shall be set at 100 %. The spindle speed deviation shall be calculated using the following formula: x 100 actual speed - programmed speed programmed speed Yo deviation = A 4 -,-,- K 2 O
42、bject Axis ( L 11 Checking of accuracy of the feed rate of the linear axes at the following feed rates: 1 a) 100 mm/min; b) 1 O00 mm/min; c) maximum feed rate; d) rapid traverse. Diagram Programmed feed rate 100 rndmin Tolerance Measured deviation 5 Yo Direction Positive Negative Positive Negative r
43、ndrnin Positive . Negative rndrnin Maximum feed rate Positive Negative Rapid traverse rndrnin Measuring instruments Laser interferometer or stopwatch Observations If a laser interferometer is used, which reads the instantaneous velocity, five readings shall be taken along the travel and the average
44、calculated If a stopwatch is used, the time shall be measured over a measuring length shorter than the programmed travel, in order to avoid the acceleration/deceleration at both ends. The override control shall be set at 100 %. The feed rate deviation shall be calculated using the following formula:
45、 % deviation = actual feed rate - programmed feed rate x, o . programmed feed rate 5 -,-,- Object Vertical machining centres: K 3 dY dX - dY = 1; c) - dX = 0,05; d) - dZ = 1; e) - dZ = 0,05; f) - dZ = 1. dX dY dY dX dX a) - = 0,05; b) Instead of an angle equal to arctan 0,05 (= 2“ 51 457, an angle o
46、f 3“ may be chosen, depending on the programming facilities. Horizontal plane Vertical YZ plane d i , / / I I I , I Tolerance 0,020 for any length of 1 O0 Vertical plane parallel to the X-axis I ! / / / / I e) /- Measured deviation Length . mm a) b) c) d) e) f) Measuring instruments Straightedge or
47、sine bar and dial gauge or electronic probe with graphic recorder Observations The measuring length shall be approximately in the middle of the table. After choosing the angle and the length of travel, place a dial gauge) on the spindle, if it can be locked, otherwise on the spindle head, reasonably
48、 perpendicular to the direction of movement. Place the straightedge or the sine bar against the dial gauge and adjust its direction. Then move the axes along the programmed path i n both directions, with a feed rate of 250 mdmin, reversing the direction outside the measuring length, and note the difference between the maximum and the minimum reading separately for each direction. The larger deviation and its direction shall be recorded. 1) When possible, the use of an electronic probe connecte