1、BRITISH STANDARD BS 4656-10: 1975 Incorporating Amendment No. 1 Specification for The accuracy of machine tools and methods of test Part 10: Drilling machines, radial type UDC 621.9.01-187:621.952.2BS4656-10:1975 This British Standard, having been approved by the MechanicalEngineering IndustryStanda
2、rds Committee,was published underthe authority of theExecutive Board on 27 March 1975 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference MEE/6 Draft for approval 74/71944 ISBN 0 580 08931 2 Co-operating organizations The Mechanical Engineering Industry
3、Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: The organizations marked with an asterisk in the above list, together with the following, were directly
4、represented on the committee entrusted with the preparation of this British Standard: Associated Offices Technical Committee Department of Industry National Association of Consulting Engineers Engineering Laboratory* Association of Hydraulic Equipment Department of Trade Manufacturers Ltd. Electrici
5、ty Supply Industry in England and Association of Mining Electrical and Wales Mechanical Engineers Engineering Equipment Users Association British Compressed Air Society Federation of Manufacturers of Construction British Electrical and Allied Manufacturers Equipment and Cranes Association Institutio
6、n of Gas Engineers British Gas Corporation Institution of Heating and Ventilating British Gear Manufacturers Association Engineers British Internal Combustion Engine Institution of Mechanical Engineers* Manufacturers Association Institution of Plant Engineers British Mechanical Engineering Instituti
7、on of Production Engineers* Confederation London Transport Executive British Pump Manufacturers Association Machine Tool Trades Association* British Steel Corporation Ministry of Defence* British Steel Industry National Coal Board Crown Agents for Oversea Governments and Process Plant Association Ad
8、ministrations Railway Industry Association of Great Britain Department of Employment (H.M. Factory Royal Institute of British Architects Inspectorate) Telecommunications Engineering Department of the Environment* Manufacturing Association Department of Industry Association of Scientific Technical an
9、d Trades Union Congress Managerial Staffs University of Aston in Birmingham Gauge and Tool Makers Association University of Manchester Institute of Science Machine Tool Industry Research Association and Technology National Federation of Engineers Tool Six individual experts Manufacturers Society of
10、Motor Manufacturers and Traders Ltd. Amendments issued since publication Amd. No. Date of issue Comments 4186 January 1983 Indicated by a sideline in the marginBS4656-10:1975 BSI 11-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Application
11、of test methods 1 4 Abbreviations 1 5 Diagrams 1 Appendix A Graph giving the axial force F as a function of the drilling capacity diameter of the machine 7 Table 1 Geometrical tests for drilling machines, radial type 2 Table 2 Practical test for drilling machines, radial type 6 Publications referred
12、 to 8BS4656-10:1975 ii BSI 11-1999 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 generall
13、y in accordance with ISO2423 “Test conditions for radial drilling machines with the arm adjustable in height-testing of the accuracy”, which the United Kingdom voted against but which UK industry now considers acceptable. This standard varies from ISO2423 in the following respects. Clauses. Clauses1
14、 to4 contain the same information as is given in ISO2423 but they are expressed more in accordance with accepted English usage. Clause5 has been added. Inch dimensions. In accordance with the UK policy of metrication, inch dimensions given in ISO2423 have not been included in this British Standard.
15、Tests. The note in column 6 of test G0 has been added by way of clarification. In test G4 the phrase “at the mouth of taper” has been replaced by “adjacent to the spindle nose”. In test G5, in order to ensure that the squareness of the spindle is checked in two planes, provision is made for the dial
16、 gauge being moved through four points of contact 90 apart instead of two points 180 apart to enable the squareness of the spindle to be checked in two planes instead of one plane. Tables. Throughout the text of the tables there have been minor changes in wording to achieve greater compliance with E
17、nglish usage without alteration in meaning. In column 6 of Table 1 andTable 2, reference to ISO/R 230 “Machine tool test code” has been replaced by reference to BS3800 “Methods for testing the accuracy of machine tools”. In certain parts of column 3 in Table 1, superfluous headings denoting sub-unit
18、s of the machine have been deleted. The headings concerned are “ A Base plate” (test G0), “B Arm” (test G2) and “C Spindle” (test G4). 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.
19、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, pages1 to 8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may
20、 have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS4656-10:1975 BSI 11-1999 1 1 Scope This Part of this British Standard specifies, with reference to BS 3800, both geometrical and practical tests for drilling machines of the radial type and g
21、ives corresponding 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, stic
22、k-slip motion of components etc.) not to its characteristics (speeds, feeds etc.) which should generally be checked before testing accuracy. 2 References The title of the British Standard referred to in this standard is given on page 8. 3 Application of test methods 3.1 In applying the tests detaile
23、d in Table 1 and Table 2, reference should be made to BS 3800, especially concerning the installation of the machine before testing, warming up of spindles and other moving parts, the description of measuring methods and the recommended accuracy of testing equipment. 3.2 The tests may be applied in
24、any order that is practicable and that makes for ease of mounting of instruments or gauging. The sequence in which the geometrical tests are listed in Table 1 is related to the sub-assemblies of the machine and it is not intended to impose the practical order in which the tests are to be done. 3.3 I
25、t 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 agreement 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 machi
26、ne is ordered. 3.4 When establishing the tolerance for a measuring range different from that given in this standard (see2.3.11 of BS 3800:1964), it should be taken into consideration that the minimum value of tolerance is0.01mm for geometrical and practical tests. 3.5 Unless otherwise specified, geo
27、metrical tests are carried out at the following positions: arm set at mid-travel on the column and saddle set at mid-travel on the arm. 4 Abbreviations For the purposes of this standard, various methods of expressing permissible deviations are employed, each having a particular type of application.
28、The methods employed are as follows. 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 deviations of str
29、aightness 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 proportionality rule comes
30、 into operation if the measurement length differs from that indicated.BS 4656-10:1975 2 BSI 11-1999 Table 1 Geometrical tests for drilling machines, radial type All dimensions are in millimetres. 1 2 3 4 5 6 No. Diagram Object Permissible deviation Measuring instruments Observations and references t
31、o the test code BS 3800 G0 Levelling of the base plate 0.1/1000 Precision level and straightedge 3.11 The variation of level shall not exceed the permissible deviation NOTEThis test should be carried out only when instructions on levelling have not been provided by the manufacturer G1 Checking of fl
32、atness of the base plate 0.1 for a measuring length of 1000 (flat to concave) Precision level or straightedge and gauge blocks 5.322 and 5.323BS 4656-10:1975 BSI 11-1999 3 Table 1 Geometrical tests for drilling machines, radial type All dimensions are in millimetres. 1 2 3 4 5 6 No. Diagram Object P
33、ermissible deviation Measuring instruments Observations and references to the test code BS3800 G2 Checking of parallelism of the saddle movement to the base plate 0.3 for any measuring length over 1000 Straightedge and dial gauge 5.422.22 Arm set parallel to the longitudinal axis of the base plate.
34、Arm locked G3 Checking of radial movement of arm parallel to base plate at three positions of saddle equally spaced along movement of arm 0.05 for any measuring length over 300 Dial gauge 5.422.22 Dial gauge mounted on spindle Saddle locked at each of its three positions in turnBS 4656-10:1975 4 BSI
35、 11-1999 Table 1 Geometrical tests for drilling machines, radial type 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 Measurement of run-out of the internal taper of the spindle (spin
36、dle retracted): (a) adjacent to the spindle nose; (b) at a distance of l = 300mm from the spindle nose (a) 0.025 (b) 0.05 Dial gauge and test mandrel 5.612.3 Arm and saddle locked G5 Checking of squareness of the spindle axis to the base plate 0.2/1000 a Dial gauge and straightedge 5.512.1 and 5.512
37、.42 Arm and saddle locked before taking measurements. Checking shall be carried out with the arm successively at its upper position, at its mid-travel and then at its lower position a Distance between the four points of contact 90 apart.BS 4656-10:1975 BSI 11-1999 5 Table 1 Geometrical tests for dri
38、lling machines, radial type 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 G6 Checking of squareness of the vertical movement of the spindle to the base plate: (a) in a plane parallel t
39、o the plane of symmetry of the machine; (b) in the plane perpendicular to the plane of symmetry of the machine (a) 0.1/300 (b) 0.05/300 Square, dial gauge and straightedge 5.522.2 Arm and saddle lockedBS 4656-10:1975 6 BSI 11-1999 Table 2 Practical test for drilling machines, radial type All dimensi
40、ons are in millimetres. 1 2 3 4 5 6 No. Diagram Object Permissible deviation Measuring instruments Observations and references to the test code BS3800 P1 Measurement of deflection of the spindle axis from its position square with the table under an axial force applied to the spindle: (a) in a plane
41、parallel to the plane of symmetry of the machine; (b) in a plane perpendicular to the plane of symmetry of the machine 3/1000 Special equipment. Dial gauges and load cell It is unnecessary to follow the test code BS 3800. A drilling test shall not be carrie d out but an axial force F (applied agains
42、t a box table placed on the base plate) shall be exerted on the spindle nose. The test shall be carried out with the saddle in its extreme position on the arm, the arm being set at the top of the column and with the base plate bolted to the machine foundation. The application of force F and the meas
43、urement of the deflection under load of the axis of the spindle in relation to the table surface shall be made directly on the spindle nose with the aid of special equipment A mounted directly on the spindle nose. The base B of the load cell shall be of sufficient area and rigidity to eliminate any
44、deformation of the box table. The value of force F to be exerted shall be specified by the manufacturer. In the absence of a specified load, reference shall be made to the graph given in Appendix A to determine the load as a function of the drilling capacity of the machine. Spindle retracted. Saddle
45、 locked on the arm and arm locked on the column. A calibration sheet for the test instrument M should be supplied.BS4656-10:1975 BSI 11-1999 7 Appendix A Graph giving the axial force F as a function of the drilling capacity diameter of the machine NOTE 1This graph only gives typical values represent
46、ing average thrusts when drilling medium steel (tensile strength R between0.55GPa and 0.65 GPa 1) ) with freshly sharpened drills. NOTE 2For diameters greater than 25mm, the graph is approximately rectilinear. 1) Provisional value.BS 4656-10:1975 8 BSI 11-1999 Publications referred to This standard
47、makes reference to the following British Standard: BS 3800, Methods for testing the accuracy of machine tools. BS4656-10:1975 BSI 11-1999 BSI Certification Trade Mark The Kitemark The Kitemark is the registered certification trade mark of the British Standards Institution. A licence to use the Kitem
48、ark on or in relation to a product will be granted to any manufacturer or producer who demonstrates that he can and will be able consistently to make that product to a specified British Standard. His capability of doing so is initially assessed by inspection of his production process, quality contro
49、l organization and test facilities, and by independent testing of a sample of the product against all the criteria of the relevant standard. The licensee is required to accept, and to operate in accordance with, a BSI scheme of supervision and control which identifies the tests to be carried out during manufacture and on the completed product, and specifies the frequency of such testing. BSI carries out unannounced inspection visits to the manufacturers works and audit testing of the product, and may withdraw the licence fo
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