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1、BRITISH STANDARD BS ISO 10791-3:1998 Test conditions for machining centres Part 3: Geometric tests for machines with integral indexable or continuous universal heads (vertical Z-axis) ICS 25.040.10 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:17:56 GMT+00:00 2006, Uncontrolled Copy, (c)
2、 BSI BS ISO 10791-3:1998 This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 March 1999 BSI 05-1999 ISBN 0 580 30977 0 National foreword This British Standard rep
3、roduces verbatim ISO 10791-3:1998 and implements it as the UK national standard. It partially replaces BS 4656-30:1992 which will be withdrawn once all other parts of this standard are published The UK participation in its preparation was entrusted to Technical Committee MTE/1, Machine tools, which
4、has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them i
5、n the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitl
6、ed “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Complianc
7、e with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ISO title page, pages ii to iv, pages 1 to 46, an inside back cover and a back cover. This standard has been updated
8、 (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:17:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
9、 BS ISO 10791-3:1998 BSI 05-1999i Contents Pages National forewordInside front cover Forewordiii Text of ISO 10791-31 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:17:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:17:56 GM
10、T+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:17:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 10791-3:1998 ii BSI 05-1999 Contents Page Forewordiii Introduction1 1Scope1 2Normative reference1 3Preliminary remarks1 3.1Measuring units1 3.2Re
11、ference to ISO 230-11 3.3Testing sequence2 3.4Tests to be performed2 3.5Measuring instruments2 3.6Diagrams2 3.7Pallets2 3.8Software compensation2 3.9Machine configurations2 3.10 Designation2 3.11 Minimum tolerance2 4Geometric tests5 4.1Straightness of linear motions5 4.2Angular deviations of linear
12、motions8 4.3Squareness between linear motions11 4.4Spindle14 4.5Table or pallet16 Annex A (normative) Integral universal 45 split indexable heads24 Annex B (normative) Integral universal swivel heads33 Annex C (normative) Integral universal 45 split continuous heads40 Annex D (informative) Bibliogra
13、phyInside back cover Figure 13 Table 1 Classification of configurations of horizontal primary rotary axis machining centres4 Descriptors: Machining centre, numerical control, machine tools, positioning, tests, geometric tests, testing conditions. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 2
14、6 07:17:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 10791-3:1998 BSI 05-1999iii 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
15、 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 col
16、laborates 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
17、by at least 75 % of the member bodies casting a vote. International Standard ISO 10791-3 was prepared by Technical Committee ISO/TC 39, Machine tools, Subcommittee SC 2, Test conditions for metal cutting machine tools. ISO 10791 consists of the following parts, under the general title Test condition
18、s 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 vertical primary rotary axis (vertical Z-axis); Part 3: Geometric tests for machines
19、with integral indexable or continuous universal heads (vertical Z-axis); Part 4: Accuracy and repeatability of positioning of linear and rotary axes; Part 5: Accuracy and repeatability of positioning of work-holding pallets; Part 6: Accuracy of feeds, speeds and interpolations; Part 7: Accuracy of a
20、 finished test piece; Part 8: Evaluation of the 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 distortions; Part 11: Evaluation of the noise emission. Annex A Annex B and Annex C fo
21、rm an integral part of this part of ISO 10791. Annex D is for information only. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:17:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:17:56 GMT+00:00 2006, Uncontrolled Copy, (c) B
22、SI BS ISO 10791-3:1998 BSI 05-19991 Introduction 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
23、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 for comparison, acceptance, maintenance or any other purpose. ISO 10791 specifies, with reference to the relevant parts of ISO 230, Test code for machi
24、ne tools, several families 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. ISO 10791 also establishes the tolerances or maximum acceptable values for the test results corres
25、ponding to general purpose and normal accuracy machining centres. ISO 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. 1 Scope This part of ISO 107
26、91 specifies, with reference to ISO 230-1, the geometric tests for machining centres (or numerically controlled milling machines, boring machines, etc., where applicable) with integral indexable or continuous universal heads (vertical Z-axis). This part of ISO 10791 applies to machining centres havi
27、ng basically six numerically controlled axes, of which three are linear (X, Y and Z) up to 2 000 mm in length, and three are rotary (A or D and B on the head, and C on the table). Movements other than those mentioned are considered as special features and the relevant tests are not included in this
28、part of ISO 10791. This part of ISO 10791 describes geometric tests for three possible types of accessory universal heads, in the annexes: Annex A: Integral universal 45 split indexable heads (B and D axes), with mechanical indexing of the different angular positions of the two bodies (e.g. Hirth co
29、uplings): the relevant tests (AG1 to AG9) check only the resulting position of the spindle; Annex B: Integral universal swivel heads (B and A axes), with two numerically controlled rotary axes perpendicular to each other (tests BG1 to BG7); Annex C: Integral universal 45 split continuous heads (B an
30、d D axes), similar to the first type but provided with continuous positioning of the two numerically controlled rotary axes: the relevant tests (CG1 to CG7) check all the geometric features (planes and axes) which contribute to the resulting position of the spindle, excluding the positioning accurac
31、y of the two rotary axes; these tests can also be used for a deeper investigation on the 45 indexable heads, if their movements and locks allow this. This part of ISO 10791 deals only with the verification of accuracy of the machine and does not apply to the testing of the machine operation, which s
32、hould generally be checked separately. Certain tests concerning the performance of the machine operating under no-lead or finishing conditions are included in other parts of ISO 10791. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute
33、provisions of this part of ISO 10791. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this part of ISO 10791 are encouraged to investigate the possibility of applying the most recent edition of the standard indica
34、ted 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 machines operating under no-load or finishing conditions. 3 Preliminary remarks 3.1 Measuring units In this part of ISO 10791, al
35、l linear dimensions, deviations and corresponding tolerances are expressed in millimetres; angular dimensions are expressed in degrees, and angular deviations and the corresponding tolerances are expressed in ratios, but in some cases microradians or arc seconds may be used for clarification purpose
36、s. The equivalence of the following expressions should always be kept in mind: 0,010/1 000 = 10 4rad 20 3.2 Reference to ISO 230-1 To apply this part of ISO 10791, reference shall be made to ISO 230-1, especially for the installation of the machine before testing, warming up of the spindle and other
37、 moving components, description of measuring methods and recommended accuracy of testing equipment. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:17:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 10791-3:1998 2 BSI 05-1999 In the “Observations” block of the tests described in claus
38、e 4 and Annex A to Annex C, the instructions are followed by a reference to the corresponding clause in ISO 230-1 in cases where the test concerned is in compliance with the specifications of ISO 230-1. 3.3 Testing sequence The sequence in which the tests are presented in this part of ISO 10791 in n
39、o way defines the practical order of testing. In order to make the mounting of instruments or gauging easier, tests may be performed in any order. 3.4 Tests to be performed When testing a machine, it is not always necessary nor possible to carry out all the tests described in this part of ISO 10791.
40、 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 are of interest. These tests are to be clearly stated when ordering a machine. Mere ref
41、erence to this part of ISO 10791 for the acceptance tests, without specifying the tests to be carried out, and without agreement on the relevant expenses, cannot be considered as binding for any contracting party. 3.5 Measuring instruments The measuring instruments indicated in the tests described i
42、n clause 4 and Annex A to Annex C are examples only. Other instruments measuring the same quantities and having at least the same accuracy may be used. Dial gauges shall have a resolution of 0,001 mm or better. 3.6 Diagrams In this part of ISO 10791, for reasons of simplicity, the diagrams associate
43、d with geometric tests illustrate only one type of machine. 3.7 Pallets For machines working with several pallets, the tests concerning the intrinsic geometric features or their behaviour in relation to the axes of the machine (tests G12 to G19) are to be performed on only one representative pallet
44、clamped in position, unless otherwise specified by a written agreement between the user and the supplier/manufacturer. 3.8 Software compensation When software facilities are available for compensating certain geometric deviations, based on an agreement between the user and the supplier/manufacturer,
45、 the relevant test may be carried out with or without these compensations. When the software compensation is used, this shall be stated in the test results. 3.9 Machine configurations The machines considered in this part of ISO 10791 are divided into 12 basic family configurations based on their arc
46、hitectures and the components moving along the linear axes. These families are identified by means of numbers from 01 to 12 as shown in Figure 1. The classification of these configurations is shown in Table 11). 3.10 Designation A designation is also supplied, as a short code, in order to define the
47、 architecture of a machining centre; this designation is given by the following elements, in the given order: a) “machining centre” b) the reference of this part of ISO 10791, i.e. ISO 10791-3; c) the letter “A” for type A heads (as specified in Annex A); d) the letter “B” for type B heads (as speci
48、fied in Annex B); e) the letter “C” for type C heads (as specified in Annex C); f) the number indicated in the relevant box of Figure 1 and the left-hand column of Table 1. EXAMPLE A machining centre, with universal integral head, with the column moving along the X-axis, the spindle head slide movin
49、g along the Z-axis and the table moving along the Y-axis is designated as follows: Machining centre ISO 10791-3 type A02 3.11 Minimum tolerance When establishing the tolerance for a measuring length different from that given in this part of ISO 10791 (see 2.311 of ISO 230-1:1996), it shall be taken into consideration that the minimum value of tolerance is 0,005 mm. 1) Some vertical machining centres are built with an architecture similar to type V10 (portal type) or V11 (gantry type) but with only one column. ISO 10791-3 is applicabl