1、BRITISH STANDARD BS ISO 4703:2001 Test conditions for surface grinding machines with two columns Machines for grinding slideways Testing of the accuracy ICS 25.080.50 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS ISO 4703:2001 This British Standard, having been prepared un
2、der the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 17 September 2001 BSI 17 September 2001 ISBN 0 580 38474 8 National foreword This British Standard reproduces verbatim ISO4703:2001 and imple
3、ments it as the UK national standard. It supersedes BS 4656-23:1979 which is withdrawn. 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
4、 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 entitled “International Standards Correspondence Index”, or by using the “Find” facility of the
5、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. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid e
6、nquirers 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 in the UK. Summary of pages This
7、document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 28, an inside back cover 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 Comments
8、Reference number ISO 4703:2001(E) OSI 1002 INTERNATIONAL STANDARD ISO 4703 Third edition 2001-08-15 Test conditions for surface grinding machines with two columns Machines for grinding slideways Testing of the accuracy Conditions dessai des machines rectifier les surfaces planes deux montants Machin
9、es rectifier les glissires Contrle de la prcisionii ISO 4703:2001(E)iii Contents Page Foreword.iv 1 Scope 1 2 Normative references 1 3 Terminology and designation of axes .1 4 Preliminary remarks 3 5 Specific installation conditions4 6 Geometric tests5 7 Machining tests22 8 Accuracy and repeatabilit
10、y of numerically controlled positioning axes .24 Annex A (informative) Equivalent terms in German and Italian .27 Bibliography28ISO 4703:2001(E) iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work o
11、f 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-governmenta
12、l, 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/IEC Directives, Part 3. Draft In
13、ternational 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 the elements of this Internati
14、onal Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 4703 was prepared by Technical Committee ISO/TC 39, Machine Tools, Subcommittee SC 2, Test conditions for metal cutting machine tools. This t
15、hird edition cancels and replaces the second edition (ISO 4703:1984), which has been technically revised. Annex A of this International Standard is for information only.INTERNATIONAL STANDARD ISO 4703:2001(E)1 Test conditions for surface grinding machines with two columns Machines for grinding slide
16、ways Testing of the accuracy 1 Scope This International Standard specifies, with reference to ISO 230-1 and ISO 230-2, geometric tests, machining tests and tests for checking accuracy and repeatability of positioning on general purpose and normal accuracy surface grinding machines with two columns f
17、or grinding slideways. It also specifies the applicable tolerances corresponding to the above-mentioned tests. This International Standard is applicable to machines with rectilinear grinding movements and with a movable table. It does not include machines with a fixed table or with a rotary table mo
18、vement. This International Standard deals only with the verification of the accuracy of the machine. It does not apply to the testing of the machine operation (vibration, abnormal noises, stick-slip motion of components, etc.) nor to machine characteristics (such as speeds, feeds, etc.), which shoul
19、d generally be checked before testing the accuracy. This International Standard provides the terminology used for the principal components of the machine and the designations of the axes with reference to ISO 841 1 . NOTE In addition to terms used in the three official ISO languages (English, French
20、 and Russian), annex A of this International Standard gives the equivalent terms in the German and Italian languages; these are published under the responsibility of the member bodies for Germany (DIN) and Italy (UNI). However, only the terms given in the official languages can be considered as ISO
21、terms. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to
22、 agreements based on this International Standard are encouraged to investigate 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 re
23、gisters 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 ISO 230-2:1997, Test code for machine tools Part 2: Determination of accuracy and repeatability of positioning numeri
24、cally controlled axes 3 Terminology and designation of axes See Figure 1 and Table 1. NOTE If the horizontal spindle is considered to be the main spindle, axis designations (Y-Z and V-W) may be exchanged. In this case, R will be replaced by Q. In these circumstances, axis designation in the individu
25、al tests may be changed accordingly.ISO 4703:2001(E) 2 Figure 1 Table 1 No. English French Russian 1 Bed Banc 2 Slideway Glissire 3 Table Table 4 Left-hand column Montant gauche 5 Right-hand column Montant droit 6 Slideway, right-hand column Glissire, montant droit ; 7 Cross-rail Traverse mobile (co
26、ulisseau vertical) 8 Saddle Chariot 9 Right-hand wheelhead (vertical spindle) Poupe porte-meule de droite (broche axe vertical) () 10 Left-hand wheelhead (horizontal spindle) Poupe porte-meule de gauche (broche axe horizontal) ( ) 11 Bridge Entretoise 12 Grinding wheel Meule ISO 4703:2001(E)3 4 Prel
27、iminary remarks 4.1 Measuring units In this International Standard, 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 expressed in ratios but, in some c
28、ases, microradians or arcseconds may be used for clarification purposes. The equivalence of the following expressions should always be kept in mind: 0,010/1 000 = 10 rad 2“ 4.2 Reference to ISO 230-1 To apply this International Standard, reference shall be made to ISO 230-1, especially for the insta
29、llation of the machine before testing, warming up of the spindle and other moving components, description of measuring methods and recommended accuracy of testing equipment. In the “Observations” box of the tests described in the following clauses, the instructions are accompanied by a reference to
30、the corresponding clause in ISO 230-1 in cases where the test concerned is in compliance with the specifications of ISO 230-1. Reference should be made to ISO 230-2 for positioning tests. 4.3 Testing sequence The sequence in which the tests are presented in this International Standard in no way defi
31、nes the practical order of testing. In order to make the mounting of instruments or gauging easier, tests may be performed in any order. 4.4 Tests to be performed When testing a machine, it is not always necessary or possible to carry out all the tests described in this International Standard. When
32、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 reference
33、 to this International Standard 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. 4.5 Measuring instruments The measuring instruments indicated in the tests described in
34、 clauses 6, 7 and 8 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 at least 0,001 mm. 4.6 Minimum tolerance When establishing the tolerance for a measuring length different from that given i
35、n this International Standard (see 2.311 of ISO 230-1:1996), it shall be taken into consideration that the minimum value of tolerance is 0,005 mm. 4.7 Machining tests Machining tests shall be made with finishing cuts only. Roughing cuts shall be avoided since they are liable to generate appreciable
36、cutting forces.ISO 4703:2001(E) 4 5 Specific installation conditions 5.1 Foundations Foundations are essential for providing the necessary stiffness to this type of machine which should always be installed in the users workshop on foundations designed and manufactured correctly. Foundations suitable
37、 to every type of machine are not always available in the manufacturers assembly workshop; therefore, if the test is being carried out on a machine simply resting on the floor, this shall be taken into account and recorded on the test report. 5.2 Isolation Foundations should be isolated from the sur
38、rounding floor in order not to transmit vibrations and/or heat. 5.3 Thermal conditions When the table is hydraulically operated, it is subject to thermal distortions due to the temperature difference between the oil beneath and the coolant on its top. The test shall then be carried out after moving
39、the table and delivering coolant for a time sufficient to let it reach the working condition, following the manufacturers instructions. 5.4 Testing temperature The test room temperature variation should not exceed 2 C. Otherwise, the ambient temperature conditions throughout the tests shall be speci
40、fied by agreement between the supplier/manufacturer and user. The machine should be placed in this environment at least 24 h prior to the tests.ISO 4703:2001(E)5 6 Geometric tests 6.1 Axes of motion Object G1 Checking of straightness of the table longitudinal movement (X-axis): a) in the horizontal
41、XY-plane (EYX); b) in the vertical ZX-plane (EZX). Diagram a) b) Tolerance a) and b) 0,02 for measuring lengths up to 2 000 add 0,01 for each 1 000 increase in length, for length greater than 2 000 mm Maximum tolerance: 0,10 Local tolerance: 0,01 for any measuring length of 1 000 Measured deviation
42、For X = a) b) Measuring instruments Optical methods Observations and references to ISO 230-1:1996 5.232.12, 5.232.13 and 5.232.14 The optical component is mounted on the wheelhead in order to reduce effects of the non-rigid table. The support of the bridge should be at the same distance as the suppo
43、rt of the workpiece. When mounting the telescope, be aware of the possible flexibility of the table.ISO 4703:2001(E) 6 Object G2 Checking of angular deviation of the table longitudinal movement (X-axis): a) in the ZX-plane (EBX: pitch); b) in the vertical YZ-plane (EAX: roll). Diagram a) a Reference
44、 level b) Tolerance a) b) Xu 4 000 0,04/1 000 0,02/1 000 X 4 000 0,06/1 000 0,03/1 000 Measured deviation For X = a) b) Measuring instruments Precision level or optical methods Observations and references to ISO 230-1:1996 5.231.3, 5.232.2 and 5.232.21 One level shall be placed on the movable compon
45、ent: a) (EBX: pitch); in the X-axis direction; b) (EAX: roll); in the Y-axis direction. When the X-axis motion causes an angular deviation of both spindle head and work holding table, differential measurements of the two angular deviations shall be made, and this shall be stated. The reference level
46、 shall be located on the spindle head, and the head shall be in the middle of the travel range. Measurements shall be carried out in at least five equally spaced positions with a maximum distance of 1 000, along the travel in both directions of movement. The difference between the maximum reading an
47、d the minimum reading of the two directions shall not exceed the tolerance. Measurements shall be repeated with the level placed at two ends (within 500 mm from the edges) and at the middle of the table.ISO 4703:2001(E)7 Object G3 Checking of the straightness of the wheelhead saddle movement on the
48、cross-rail (Y-axis): a) in the XY-plane (horizontal plane) (EXY); b) in the YZ-plane (vertical plane) (EZY). Diagram a) b) Tolerance a) and b) 0,02 for measuring lengthsu 1 000; add 0,01 for each 1 000 increase in length, for length greater than 1 000 mm Maximum tolerance: 0,04 Local tolerance: 0,01
49、 for any measuring length of 500 Measured deviation For Y = a) b) Measuring instruments Straightedge, dial gauge and gauge blocks or optical methods Observations and references to ISO 230-1:1996 5.232.1, 5.232.11 and 5.232.13 and 5.232.14 Fix the cross-rail at mid-height and place the table at the mid-travel. Set up the
