1、BRITISH STANDARD BS4656-15: 1976 Specification for Accuracy of machine tools and methods of test Part15: Drilling machines, turret and single spindle co-ordinate types UDC621.9.01187:621.952.7BS4656-15:1976 This British Standard, having been prepared under the directionof the Mechanical Engineering
2、Industry StandardsCommittee, was published under the authorityofthe Executive Boardon 30 April1976 BSI10-1999 The following BSI references relate to the work on this standard: Committee reference MEE/6 Draft for comment71/38692DC ISBN 0 580 09262 3 Co-operating organizations The Mechanical Engineeri
3、ng Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Associated Offices Technical Committee Electricity Supply Industry in England and Associatio
4、n of Consulting Engineers Wales Association of Hydraulic Equipment Engineering Equipment Users Association Manufacturers Ltd. Federation of Manufacturers of Construction Association of Mining Electrical and Equipment and Cranes Mechanical Engineers Health and Safety Executive (HM Factory British Com
5、pressed Air Society Inspectorate) British Electrical and Allied Manufacturers Institution of Gas Engineers Association Institution of Heating and Ventilating British Gas Corporation Engineers British Gear Manufacturers Association Institution of Mechanical Engineers* British Internal Combustion Engi
6、ne Institution of Plant Engineers Manufacturers Association Institution of Production Engineers British Mechanical Engineering London Transport Executive Confederation Machine Tool Trades Association* British Pump Manufacturers Association Ministry of Defence* British Steel Corporation National Coal
7、 Board British Steel Industry Process Plant Association Crown Agents for Oversea Governments and Railway Industry Association of Great Britain Administrations Royal Institute of British Architects Department of the Environment* Society of Motor Manufacturers and Traders Department of Industry* Ltd.*
8、 Department of Industry National Telecommunications Engineering Engineering Laboratory Manufacturing Association Department of Trade The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of
9、this British Standard: Ball and Roller Bearing Manufacturers University of Aston in Birmingham Association University of Manchester Institute of Science Machine Tool Industry Research Association and Technology National Federation of Engineers Tool Individual experts Manufacturers Amendments issued
10、since publication Amd. No. Date of issue CommentsBS4656-15:1976 BSI 10-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Abbreviations 1 4 Application of test methods 1 5 Diagrams 1 Appendix A Graph giving the axial force F as a function of the
11、 drilling capacity diameter of the machine 10 Table 1 Geometrical tests for drilling machines of turret and single spindle co-ordinate types 2 Table 2 Practical test for drilling machines of turret and single spindle co-ordinate types 9 Publication referred to Inside back coverBS4656-15:1976 ii BSI
12、10-1999 Foreword This Part of this British Standard has been prepared under the authority of the Mechanical Engineering Industry Standards Committee and implements agreements of the International Organization for Standardization (ISO). This Part of the standard is generally in accordance with ISO319
13、0 “Test conditions for turret and single spindle co-ordinate drilling machines with vertical spindle Testing of the accuracy” but varies from ISO3190 in the following respects. a) Clauses1 and4 contain the same information as is given in ISO3190 but they are expressed in accordance with an accepted
14、format that has been adopted for the BS4656 series of standards and also are more in accordance with accepted English usage. Clauses3 and5 have been added. b) In accordance with the UK policy of metrication, inch dimensions given in ISO3190 have not been included in this British Standard. c) In test
15、G0 column6 the note has been added. In testG3 column5 reference to microscope and taut wire has been added, and in column6 reference to5.232 of the test code has been deleted as it is not applicable. The wording has been changed to comply with accepted English usage without altering its technical me
16、aning in testsG0,G4,G6,G9,G10,G11 andG12. d) In column6 of Table 1 andTable 2, reference to ISO/R230 “Machine tool test code” has been replaced by reference to BS3800 “Methods for testing the accuracy of machine tools”. In certain parts of column3 in Table 1, superfluous headings denoting subunits o
17、f the machine have been deleted. The headings concerned are “A-Table” (testG1), “B-Spindle” (testG7), “C-Spindle Head” (testG10) and “D-Multi-Spindle Turret Head” (testG12). The heading4 “Test conditions and permissible deviations” has been deleted. The subheadings4.1 and4.2 have been deleted and re
18、placed by the designations Table 1 and Table 2 respectively to conform with BSI editorial practice. 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
19、does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to10, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. Th
20、is will be indicated in the amendment table on the inside front cover.BS4656-15:1976 BSI 10-1999 1 1 Scope This Part of this British Standard specifies, with reference to BS3800, both geometrical and practical tests for drilling machines of the turret and single spindle co-ordinate types and gives c
21、orresponding permissible deviations which apply. This standard is applicable to machines of general purpose use and normal accuracy. It deals only with the verification of accuracy of the machine. It does not apply to the testing of the running of the machine (vibrations, abnormal noises, stick-slip
22、 motion of componentsetc.) nor to its characteristics (speeds, feedsetc.), which should generally be checked before testing accuracy. There is a wide variety of machine configurations covered by turret and single spindle co-ordinate drilling machines, all of which carry out the same basic functions
23、to the same degree of accuracy. Therefore the accuracy tests contained in this standard should be selected to suit the particular machine configuration (seealso4.3). Examples of the main co-ordinate single spindle or turret drilling machine configurations to which this standard is applicable are as
24、follows: a) knee type; b) single column, bed type; c) double column, bridge type. 2 References The title of the British Standard referred to in this standard is given on the inside back cover. 3 Abbreviations For the purposes of this standard, various methods of expressing permissible deviations are
25、 employed, each having a particular type of application. The methods employed are as follows. 4 Application of test methods 4.1 In applying the tests detailed in Table 1 and Table 2, reference should be made to BS3800, especially concerning the installation of the machine before testing, the warming
26、 up of spindles and other moving parts, the description of measuring methods and the recommended accuracy of testing equipment. 4.2 The tests may be applied in any order that is practicable and that makes for ease of mounting of instruments or gauging. The sequence in which the geometrical tests are
27、 listed in Table 1 is related to the subassemblies of the machine and it is not intended to impose the practical order in which the tests are to be done. 4.3 It is not always necessary for all the tests specified in this standard to be carried out. The purchaser shall be at liberty to select, in agr
28、eement with the manufacturer, those tests relating to the properties that are of interest to him. The appropriate tests are to be clearly stated when the machine is ordered. 4.4 As far as turret head drilling machines are concerned, it is intended that all geometrical tests which concern the rotatio
29、n of the spindle, i.e.testsG7,G8,G9 andG12, shall be carried out on all spindles. 4.5 When establishing the tolerance for a measuring range different from that given in this standard (see2.311 of BS3800:1964), it should be taken into consideration that the minimum value of tolerance is0.01mm for geo
30、metrical and practical tests. 5 Diagrams For reasons of simplicity the diagrams in this standard illustrate only one type of machine. - - - / - - - This type of expression applies to deviations of perpendicularity that are ratios. - - - for any length of- - - This type of expression applies to devia
31、tions of straightness and parallelism, and is used in fact for local permissible deviations, the measurement length being obligatory. - - - per- - - This type of expression applies to deviations of straightness and parallelism, and is used to recommend a measurement length, but in this case the prop
32、ortionality rule comes into operation if the measurement length differs from that indicated.BS 4656-15:1976 2 BSI 10-1999 Table 1 Geometrical tests for drilling machines of turret and single spindle co-ordinate types All dimensions are in millimetres. 1 2 3 4 5 6 No. Diagram Object Permissible devia
33、tion Measuring instruments Observations and references to the test code BS3800 G0 Levelling of the machine: (a) in the plane of symmetry of the machine; (b) in the plane perpendicular to the plane of symmetry of the machine and passing through the spindle axis 0.03/300 Precision level and straighted
34、ge 3.11 and5.212.21 NOTEThis test should be carried out only when instructions on levelling have not been provided by the manufacturer G1 Checking of flatness of the table surface 0.05 up to1000 For each1000 increase in length beyond1000, add to the preceding corresponding tolerance0.01 Maximum perm
35、issible deviation:0.08 Precision level or straightedges and gauge blocks 5.322 and5.323BS 4656-15:1976 BSI 10-1999 3Table 1 Geometrical tests for drilling machines of turret and single spindle co-ordinate types All dimensions are in millimetres. 1 2 3 4 5 6 No. Diagram Object Permissible deviation M
36、easuring instruments Observations and references to the test code BS3800 G2 Checking of parallelism of the table surface to (a) transverse movement of the table, or transverse movement of the spindle head; (b) longitudinal movement of the table 0.025 for any measuring length of300 Maximum permissibl
37、e deviation:0.05 Straightedges and dial gauge 5.422.21 The stylus of the dial gauge shall be placed approximately at the spindle axis. The measurement may be made on a straightedge laid parallel to the table surface. If the table length is greater than1000mm the inspection may be carried out by succ
38、essive movements of the straightedge. If the spindle can be locked, the dial gauge may be mounted on it. If the spindle cannot be locked, then the dial gauge shall be placed on a fixed part of the machine. Spindle head and knee or beam locked. (a) Table locked. (b) Cross slide locked G3 Checking of
39、straightness of the longitudinal median or reference tee slot of the table 0.025 for any measuring length of500 Maximum permissible deviation:0.03 Straightedge, dial gauge or gauge blocks and block or microscope and taut wire 5.212, 5.212.1, 5.212.3 The straightedge may be placed directly on the tab
40、leBS 4656-15:1976 4 BSI 10-1999Table 1 Geometrical tests for drilling machines of turret and single spindle co-ordinate types All dimensions are in millimetres. 1 2 3 4 5 6 No. Diagram Object Permissible deviation Measuring instruments Observations and references to the test code BS3800 G4 Checking
41、of parallelism of the longitudinal median or reference tee slot of the table to its longitudinal movement 0.03 for any measuring length of500 Dial gauge 5.422.21 Cross slide and knee locked G5 Checking of parallelism of the transverse median or reference tee slot of the table to the transverse table
42、 movement 0.025 for any measuring length of500 Dial gauge 5.422.21 Knee locked. Table locked in central position G6 Checking of squareness of the transverse movement of the table or the movement of the spindle head on the beam to the longitudinal movement of the table 0.035/500 Straightedge, dial ga
43、uge and square 5.522.4 Knee locked. (a) The straightedge shall be set parallel to the longitudinal movement of the table; then the square shall be placed against the straightedge. Table locked in central position. (b) Then check the table transverse movement or the spindle head movement on the beamB
44、S 4656-15:1976 BSI 10-1999 5Table 1 Geometrical tests for drilling machines of turret and single spindle co-ordinate types All dimensions are in millimetres. 1 2 3 4 5 6 No. Diagram Object Permissible deviation Measuring instruments Observations and references to the test code BS3800 G7 Measurement
45、of run-out of the internal taper of the spindle: (a) near the spindle nose; (b) at a distance l of300mm from the spindle nose (a) 0.01 (b) 0.03 Dial gauge and test mandrel 5.612.3 Checking shall be repeated on all spindles, in the case of turret head drilling machines. G8 (a) Measurement of periodic
46、 axial slip. (b) Measurement of camming of the face of the spindle nose (including periodic axial slip) (a) 0.01 (b) 0.02 Dial gauge (a) 5.622.1 and5.622.2 A force F, specified by the manufacturer of the machine, should be exerted by pressing towards the housing for tests(a) and(b) (b)5.632 The dist
47、ance A of dial gauge(b) from the spindle axis should be as large as possible. Checking should be repeated on all spindles in the case of turret head drilling machinesBS 4656-15:1976 6 BSI 10-1999Table 1 Geometrical tests for drilling machines of turret and single spindle co-ordinate types All dimens
48、ions are in millimetres. 1 2 3 4 5 6 No. Diagram Object Permissible deviation Measuring instruments Observations and references to the test code BS3800 G9 Checking of straightness of the vertical slideways of the table and squareness of the spindle axis to the table surface: (a) in the vertical plan
49、e of symmetry of the machine; (b) in the plane perpendicular to the vertical plane of symmetry of the machine A-Single spindle machine (a) 0.02/300 awith u 90 (b) 0.02/300 a B-Turret machine (a) 0.025/300 awith u 90 (b) 0.025/300 a Dial gauge, straightedge and test mandrel 5.512.1 and5.512.42 For machines having a table of variable height, the inspection shall be carried out first with the table in the upper position(1) and then in the lower position(2). Spindle head, table, cross slide, knee or beam locked. Checking shall be repeated on all s
