1、BRITISH STANDARD BS ISO 10791-9:2001 Test conditions for machining centres Part 9: Evaluation of the operating times of tool change and pallet change ICS 25.040.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS ISO 10791-9:2001 This British Standard, having been prepared un
2、der the direction of the Engineering Sector Committee was published under the authority of the Standards Committee and comes into effect on 15 May 2001 BSI 05-2001 ISBN 0 580 37245 6 National foreword This British Standard reproduces verbatim ISO 10791-9:2001 and implements it as the UK national sta
3、ndard. The UK participation in its preparation was entrusted to Technical Committee MTE/1, Machine tools, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement interna
4、tional publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “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 ne
5、cessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee
6、any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a
7、 blank page, pages 1 to 15 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsReference number ISO 10791-9:2001(E) INTERNATIONAL STANDARD ISO 10791-9 First edition 2001-03-15 Test
8、conditions for machining centres Part 9: Evaluation of the operating times of tool change and pallet change Conditions dessai pour centres dusinage Partie 9: valuation des temps opratoires de changement doutils et de changement de palettesISO 10791-9:2001(E) i ii ISO 10791-9:2001(E)iii Contents Page
9、 Foreword.iv Introduction.v 1 Scope 1 2 Normative references 1 3 Terms and definitions .2 4 Preliminary remarks 2 4.1 Measuring units .2 4.2 Measuring instruments .2 4.3 Test to be performed .2 4.4 Safeguarding2 5 Evaluation of the cut-to-cut tool change time (CTC)2 5.1 Process .2 5.2 Reference posi
10、tion and tool change position.3 5.3 Tool store configurations .4 5.4 Tool store management 4 5.5 Test procedure.4 5.6 Universal heads .6 5.7 Presentation of the results .6 6 Evaluation of the pallet change time (PCT).7 6.1 Process .7 6.2 Reference position, P R 7 6.3 Pallet store configuration .8 6.
11、4 Pallet store management 9 6.5 Test procedure.11 6.6 Presentation of the results .12 Annex A (informative) Principles on which the test cycles are based 14ISO 10791-9:2001(E) iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
12、(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, g
13、overnmental 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. International Standards are drafted in accordance with the rules given in the ISO/I
14、EC Directives, Part 3. 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. Attention is drawn to the possibility that some of
15、 the elements of this part of ISO 10791 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 10791-9 was prepared by Technical Committee ISO/TC 39, Machine tools, Subcommittee SC 2, Test conditions for metal
16、cutting machine tools. 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 uni
17、versal 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 axes Part 5: Accuracy and repeatability of positioning
18、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 Part 9: Evaluation of the operating times of tool change and pallet change Part 10: Evaluation of the
19、 thermal distortions Part 11: Evaluation of the noise emission Annex A of this part of ISO 10791 is for information only.ISO 10791-9:2001(E)v Introduction A machining centre is a numerically controlled machine tool capable of performing multiple machining operations, including milling, boring, drill
20、ing and tapping, as well as automatic tool changing from a magazine or similar storage unit in accordance with a machining programme. Most machining centres have facilities for automatically changing the direction in which the workpieces are presented to the tool. The purpose of ISO 10791 is to supp
21、ly information as wide and comprehensive as possible on tests and checks which can be carried out for comparison, acceptance, maintenance or any other purpose. ISO 10791 specifies, by reference to the relevant parts of ISO 230, Test code for machine tools, several families of tests for machining cen
22、tres 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 corresponding to general purpose and normal accuracy machin
23、ing 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.INTERNATIONAL STANDARD ISO 10791-9:2001(E)1 Test conditions for machining centres
24、Part 9: Evaluation of the operating times of tool change and pallet change 1 Scope This part of ISO 10791 specifies certain standard test conditions for assessing the conventional length of the operating times spent by the machine to carry out different metal cutting functions. It considers two type
25、s of operating times, namely those taken by the functions of: automatic tool change (see clause 5); automatic pallet change (see clause 6). The purpose of the methods described in this part of ISO 10791 is to permit the comparison of the performance of different machining centres of similar size and
26、 features. The data obtained may also be used to establish conventional change times in technical literature in a uniform and comparable way. It is also possible to check them on a machine, both when it is new and during its working life. 2 Normative references The following normative documents cont
27、ain provisions, which, through reference in this text, constitute provisions of this part of ISO 10791. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 10791 are encouraged to investigat
28、e the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 10791-1:1998, Test co
29、nditions for machining centres Part 1: Geometric tests for machines with horizontal spindle and with accessory heads (horizontal Z-axis). ISO 10791-2:2001, Test conditions for machining centres Part 2: Geometric tests for machines with vertical spindle or universal heads with vertical primary rotary
30、 axis (vertical Z-axis). 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).ISO 10791-9:2001(E) 2 3 Terms and definitions For the purposes of this part of ISO 10791, the following terms
31、and definitions apply. 3.1 cut-to-cut tool change time CTC interval of time between the beginning of the removal of a tool to be changed from a reference position, P R ,i nt h e machining volume and the end of the approach of the next tool to the same position NOTE CTC is more suitable to judge the
32、automatic tool change operation than the pure tool change time, because CTC takes into account all the steps required for changing tools in an automatic process. 3.2 pallet change time PCT interval of time between the beginning of the removal of a pallet to be changed from a reference position, P R
33、,i nt h e machining volume and the end of the approach of the next pallet to the same position 4 Preliminary remarks 4.1 Measuring units In this part of ISO 10791 all linear dimensions are expressed in millimetres and time is expressed in seconds. 4.2 Measuring instruments The measuring instruments
34、indicated are only examples. Other instruments, measuring the same quantities and having at least the same accuracy, may be used. 4.3 Test to be performed When testing a machine, it is not always necessary or possible to carry out all the tests described in ISO 10791. When the tests are required for
35、 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. The mere reference to ISO 10791 for the
36、acceptance tests, without specifying the tests to be carried out and without agreement on the relevant expenses, cannot be considered as binding for the contracting parties. 4.4 Safeguarding For safety reasons, the machine, where reasonably practicable, should be fully assembled and guarded, with gu
37、ards and protective devices in place and functional. 5 Evaluation of the cut-to-cut tool change time (CTC) 5.1 Process CTC includes, where applicable: a) the movement between the reference position, P R , and the tool change position, P C ; b) the search for the next tool (in most cases, see Table A
38、.2); c) the tool change;ISO 10791-9:2001(E)3 d) the opening and closing of movable covers between the tool store and the work zone; e) the return to the reference position from the tool change position. NOTE Spindle deceleration and acceleration times are assumed to be contained within phases a) and
39、 e) mentioned above. 5.2 Reference position and tool change position 5.2.1 Identification of the machining volume The machining volume shall be identified by the maximum working travel distances of the three main coordinate axes. The extensions of the travel ranges of these coordinate axes which are
40、 used for auxiliary functions only (such as tool change or pallet change) shall be considered outside the machining volume. Movable components in excess of the three main coordinate axes, such as sliding spindles, quills or rams, shall be maintained retracted, in a position not requiring their movem
41、ent for the tool change. 5.2.2 Reference position, P R The reference position, P R , is a position in the machining volume generally defined by the values along the three main coordinate axes as specified in this part of ISO 10791. 5.2.2.1 Machining centres with horizontal Z-axis For machine configu
42、rations such as those shown in Figure 1 of ISO 10791-1:1998, the reference position is identified by the following values: X R at mid-travel of the X-axis; Y R at 1/4 of the Y-travel from its lower limit; Z R at a position where the spindle nose is at the edge of the table nearest to the column. If
43、the table is rectangular, its longer side shall be parallel to the X-axis. 5.2.2.2 Machining centres with vertical Z-axis For machine configurations such as those shown in Figure 1 of ISO 10791-2: and ISO 10791-3:1998, the reference position is identified by the following values: X R at mid-travel o
44、f the X-axis; Y R at mid-travel of the Y-axis; Z R at mid-travel of the Z-axis. 5.2.3 Tool change position, P C The tool change position, P C , is determined by the machine configuration. Its coordinates are X C ,Y C and Z C .ISO 10791-9:2001(E) 4 5.3 Tool store configurations 5.3.1 General The thre
45、e configurations of tool stores given in 5.3.2 to 5.3.4 can be considered, where N indicates the store capacity in number of spaces. 5.3.2 Drum or chain type bidirectional tool stores In this type of tool store the last tool T N is the closest to T 1 and T N/2 is the furthest from T 1 . 5.3.3 Drum o
46、r chain type unidirectional tool stores In this type of tool store, the last tool T N is the closest to T 1 in one direction and the furthest in the opposite direction. 5.3.4 Box or matrix type tool stores In this type of tool store, the last tool T N is the furthest from T 1 and T 2 is the closest
47、to T 1 . 5.4 Tool store management 5.4.1 General As far as the store management is concerned, the two types of tool stores given in 5.4.2 and 5.4.3 are considered in this part of ISO 10791. 5.4.2 Fixed access tool stores In these types of stores, tools are directly exchanged between the machine spin
48、dle and the store, and the management of the tool handling is rigid, in that each tool shall be put back in its slot before the next one can be taken. They may be movable tool stores (for instance drum or chain stores) or fixed tool stores (for instance box type stores) where each tool is assigned t
49、o its own slot. 5.4.3 Random access tool stores In these types of stores, a two-position tool changer is used to exchange tools between the machine spindle and the store. This design allows a random positioning by which a tool can be stored in any one of the empty slots after the next one has been loaded into the machine spindle. They may be movable tool stores (for instance drum or chain stores) or fixed tool stores (for instance stores served by a robot). 5.5 Test procedure 5.5.1 Data to be measured With both fixed access tool
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