《BS-4656-24-1993 ISO-3875-1990.pdf》由会员分享，可在线阅读，更多相关《BS-4656-24-1993 ISO-3875-1990.pdf（22页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS 4656-24: 1993 ISO 3875:1990 Accuracy of machine tools and methods of test Part 24: Specification for cylindrical external centreless grinding machines UDC 621.924.56.08 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:27:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4
2、656-24:1993 This British Standard, having been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 May 1993 BSI 09-1999 First published October 1980 Second edition May 1
3、993 The following BSI references relate to the work on this standard: Committee reference MTE/1 Draft for comment 87/78302 DC ISBN 0 580 21782 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Machine, Engineers and Hand Tools Standards
4、Policy Committee (MTE/-) to Technical Committee MTE/1, upon which the following bodies were represented: Advanced Manufacturing Technology Research Institute Cranfield Institute of Technology Health and Safety Executive Machine Tool Technologies Association Ministry of Defence Coopted members Amendm
5、ents issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:27:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4656-24:1993 BSI 09-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative references1 3Prelim
6、inary remarks1 4Nomenclature1 5Acceptance conditions and permissible deviations4 Figure 12 Table 1 Designation3 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:27:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4656-24:1993 ii BSI 09-1999 National forew
7、ord This Part of BS 4656 has been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee and implements agreements of the International Organization for Standardization (ISO). It is identical with ISO 3875:1990 Acceptance conditions for external cylindrical
8、centreless grinding machines Testing of the accuracy prepared by ISO/TC 39, Machine tools. This edition of Part 24 supersedes BS 4656-24:1980 which is withdrawn. Inch dimensions. In accordance with the UK policy of metrication, inch dimensions given in this standard are not valid and are included fo
9、r information purposes only. Diagrams. For reasons of simplicity the diagrams in this standard illustrate only one type of machine. Cross-references. The Technical Committee has reviewed the provisions of ISO 230-1:1986 and ISO 1101:1983, to which normative reference is made in the text, and has dec
10、ided that they are acceptable for use in conjunction with this standard. A related standard to ISO 230-1:1986 is BS 3800-1:1990 and a related standard to ISO 1101:1983 is BS 308-3:1990. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standa
11、rds are responsible for their correct application. Compliance 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, pages 1 to 16, an inside back cover and a back cover. This s
12、tandard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:27:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4656-24:1993 BSI 09-19991 1 S
13、cope This International Standard describes, with reference to ISO 230-1, both geometrical and practical tests on general purpose and normal accuracy external cylindrical centreless grinding machines and gives the corresponding permissible deviations which apply. It deals only with the verification o
14、f accuracy of the machine. It does not apply to the testing of the running of the machine (vibrations, abnormal noises, stick-slip motion of components etc.), or to its characteristics (speeds, feeds etc.) which should generally be checked before the accuracy is tested. This International Standard a
15、lso gives the nomenclature used for the principal parts of the machine. NOTEIn addition to terms used in the three official ISO languages (English, French and Russian), this International Standard gives the equivalent terms in the German language; these are published under the responsibility of the
16、member body for Germany, F.R. (DIN). However, only the terms given in the official languages can be considered as ISO terms. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of p
17、ublication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain re
18、gisters of currently valid International Standards. ISO 230-1:1986, Acceptance code for machine tools Part 1: Geometric accuracy of machines operating under no-load or finishing conditions. ISO 1101:1983, Technical drawings Geometrical tolerancing Tolerancing of form, orientation, location and run-o
19、ut Generalities, definitions, symbols, indications on drawings. 3 Preliminary remarks 3.1 In this International Standard, all the dimensions and permissible deviations are expressed in millimetres and in inches. 3.2 To apply this International Standard, reference should be made to ISO 230-1 especial
20、ly for the installation of the machine before testing, the warming up of spindles and other moving parts, the description of measuring methods and the recommended accuracy of testing equipment. 3.3 The sequence in which the geometrical tests are given is related to the sub-assemblies of the machine,
21、 and this 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 When inspecting a machine, it is not always necessary to carry out all the tests described in this International Standard. It is up to th
22、e user to choose, in agreement with the manufacturer, those relating to the properties which are of interest, but these tests are to be clearly stated when ordering a machine. 3.5 Practical tests shall be made with finishing cuts and not with roughing cuts which are liable to generate appreciable cu
23、tting forces. 3.6 When the tolerance is established for a measuring range different from that given in this International Standard (see ISO 230-1:1986, 2.311) it should be taken into consideration that the minimum value of tolerance is 0,002 mm (0,000 08 in). 4 Nomenclature See Figure 1 and Table 1.
24、 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:27:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4656-24:1993 2 BSI 09-1999 Figure 1 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:27:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4656-24:1993 BSI 09-19993 Table 1 Licensed
25、Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:27:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4656-24:1993 4 BSI 09-1999 5 Acceptance conditions and permissible deviations 5.1 Geometrical tests No.DiagramObject G0Levelling of the machine. G1 A Grinding wheel dresser Checking of movement of th
26、e dressing tool for a) straightness of movement in the plane of action; b) parallelism of movement to the grinding spindle axis in plane perpendicular to the plane of action; c) parallelism of movement to the grinding spindle axis in plane of action; NOTETest c) applies only for machines with fixed
27、dresser and non-adjustable template. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:27:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4656-24:1993 BSI 09-19995 Permissible deviationMeasuring instruments Observations and references to the ISO 230-1:1986 acceptance code mmin 0,1/1 0000,00
28、4/40 Precision levels Subclause 3.1 This test should be carried out only when instructions on levelling have not been provided by the manufacturer. a)0,003a)0,000 12 Subclauses 5.231, 5.233 and 5.422.3 The dial gauges shall be mounted on the dressing tool holder with their styli contacting the test
29、mandrel, which is inserted in the grinding wheel spindle, in the plane of action and in a plane perpendicular to the plane of action. for any measuring length of b) 300 0,05b) 12 0,002Dial gauge, test mandrel and master straightedge The dressing slide shall be moved with a normal working feed. The m
30、easuring distance shall be equal to the maximum width of the grinding wheel. for any measuring length of c) 300 0,03c) 12 0,001 2 If the machine is provided with a copying mechanism, the copying pin should be engaged with a normal working pressure (stated by the manufacturer) against the master stra
31、ightedge. for any measuring length of 30012Indicated permissible deviations relate to the position of the diamond point. The measuring method gives the sum of errors from the dressing mechanism. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:27:15 GMT+00:00 2006, Uncontrolled Copy, (c) BS
32、I BS 4656-24:1993 6 BSI 09-1999 No.DiagramObject G2 Alternative type of machine B Regulation wheel dresser Checking of movement of the dressing tool for a) straightness of movement in the plane of action; b) parallelism of movement relative to the regulating spindle axis in the plane of action; NOTE
33、Test b) refers only to machines with fixed dresser and non-adjustable template. c) parallelism of movement relative to the work support plane. NOTETest c) refers only to machines with a non-gradient slide in the vertical plane. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:27:15 GMT+00:0
34、0 2006, Uncontrolled Copy, (c) BSI BS 4656-24:1993 BSI 09-19997 Permissible deviationMeasuring instruments Observations and references to the ISO 230-1:1986 acceptance code mmin a)0,003a)0,000 12 Subclauses 5.231, 5.233 and 5.422.3 The dial gauges shall be mounted on the dressing tool holder with th
35、eir styli contacting the test mandrel or straightedge. for any measuring length of b) 300 0,03b) 12 0,001 2 Dial gauge, test mandrel, master straightedge and test straightedge The dressing slide shall be moved with a normal working feed. The measuring distance shall be equal to the maximum width of
36、the regulating wheel. If the machine is provided with a copying mechanism, the copying pin shall be engaged with a normal working pressure against the master straightedge. for any measuring length of 300 12 Indicated permissible deviations relate to the position of the diamond point. c)0,05c)0,002 f
37、or any measuring length ofThe measuring method gives the sum of errors from the dressing mechanism. 30012 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:27:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4656-24:1993 8 BSI 09-1999 No.DiagramObject G3 Alternative type of machine C Work re
38、st blade location a) Checking of parallelism of the work support plane to the grinding spindle axis in the vertical plane. b) Checking of parallelism of the vertical datum face to the regulating spindle axis or the grinding spindle axis in the horizontal plane. NOTETest b) applies only for machines
39、with fixed work rest blade, fixed dresser and non-adjustable template. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:27:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4656-24:1993 BSI 09-19999 Permissible deviation Measuring instruments Observations and references to the ISO 230-1:1986
40、 acceptance code mmin a)0,05a)0,002 for any measuring length of b) 300 0,03b) 12 0,001 2 Dial gauge and test mandrel Subclauses 5.412.1 and 5.412.4 The dial gauge shall be mounted on the work rest blade location surfaces with the stylus contacting the test mandrel. for any measuring length of 30012
41、Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:27:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4656-24:1993 10 BSI 09-1999 No.DiagramObject G4 D Regulating spindle a) Measurement of run-out of the wheel mounting diameter. b) Measurement of periodic axial slip of the spindle. c) Measur
42、ement of run-out of the spindle bearings. NOTETest c) is to be carried out where applicable. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:27:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4656-24:1993 BSI 09-199911 Permissible deviation Measuring instruments Observations and reference
43、s to the ISO 230-1:1986 acceptance code mmin a) b) c) 0,005 0,01 0,005 a) b) c) 0,00 2 0,000 4 0,000 2 Dial gauge and measuring balls a) Subclauses 5.612.1 and 5.612.2 In addition to the specifications given in the ISO 230-1 acceptance code, checking shall be carried out at both ends of the conical
44、or cylindrical regulating wheel mounting surface. The dial gauge shall be set normal to the surface which is to be checked. When measuring the conical surface no correction in reading of the dial gauge shall be carried out. b) Subclauses 5.621.2 and 5.622 The force F shall be determined by the machi
45、ne manufacturer. The force shall be applied in that direction which corresponds to the normal working condition of the spindle. c) Subclauses 5.612.1 and 5.612.2 This check shall be carried out on measuring balls located in the centre on the free ends of the spindle. Licensed Copy: sheffieldun sheff
46、ieldun, na, Fri Dec 01 01:27:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4656-24:1993 12 BSI 09-1999 No.DiagramObject G5 E Grinding spindle a) Measurement of run-out of the wheel mounting diameter. NOTETest a) does not apply to machines with automatic wheel balancing. b) Measurement of periodic
47、 axial slip of the spindle. c) Measurement of run-out of the spindle bearings. NOTETest c) is to be carried out where applicable. G6 F Feeding device Measurement of accuracy of repetition of the finishing approach of the wheel positioning. NOTEThis test applies only for machines equipped for infeed
48、grinding operations. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:27:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4656-24:1993 BSI 09-199913 Permissible deviation Measuring instruments Observations and references to the ISO 230-1:1986 acceptance code mmin a) b) c) 0,005 0,008 0,005
49、a) b) c) 0,000 2 0,00 32 0,000 2 Dial gauge and measuring balls a) Subclauses 5.612.1 and 5.612.2 In addition to the specifications given in the ISO 230-1 acceptance code, checking shall be carried out at both ends of the conical or cylindrical grinding wheel mounting surface. The dial gauge shall be set normal to the surface which is to be checked. When measuring the conical surface, no correction in reading of the dial gauge shall be carried out. b) Subclauses 5.621.2 and 5.622 The force F shall be determined by the machine manufactur