1、BRITISH STANDARD BS 3064:1978 Specification for Metric sine bars and sine tables (excluding compound tables) UDC 621.753:531.745BS3064:1978 This British Standard, having been prepared under the directionof the Mechanical Engineering Standards Committee, was published underthe authority of the Execut
2、ive Board on 31January1978 BSI 08-1999 First published February1959 First revision January1978 The following BSI references relate to the work on this standard: Committee reference MEE/59 Draft for comment 73/30909 DC ISBN 0 580 09577 0 Cooperating organizations The Mechanical Engineering Standards
3、Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Associated Offices Technical Committee Association of Consulting Engineers Association of Hydraulic Equipment Manufa
4、cturers Association of Mining Electrical and Mechanical Engineers British Compressed Air Society British Electrical and Allied Manufacturers Association (BEAMA) British Gas Corporation British Gear Manufacturers Association British Internal Combustion Engine Manufacturers Association British Pump Ma
5、nufacturers Association British Steel Corporation Chartered Institution of Building Services Crown Agents for Oversea Governments and Administrations Department of the Environment Department of Industry (Mechanical Engineering) Department of Industry (National Engineering Laboratory) Department of T
6、rade (Marine Division) Department of Transport Electricity Supply Industry in England and Wales Engineering Equipment Users Association Federation of Manufacturers of Construction Equipment and Cranes Health and Safety Executive Institution of Gas Engineers Institution of Mechanical Engineers Instit
7、ution of Plant Engineers Institution of Production Engineers* London Transport Executive Machine Tool Trades Association Ministry of Defence* National Coal Board Process Plant Association Railway Industry Association of Great Britain Society of Motor Manufacturers and Traders Limited Telecommunicati
8、on Engineering design requirements are confined to essentials, but the desired accuracy of manufacture is fully specified in order to ensure the suitability of the sine bars and tables for use as precision measuring equipment. Inspection and certification of sine bars may be undertaken by laboratori
9、es approved by the British Calibration Service; addresses can be obtained on application to the Superintendent, British Calibration Service, National Physical Laboratory, Teddington, Middlesex, TW11 0LW. A British Standard does not purport to include all the necessary provisions of a contract. Users
10、 of British Standards 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, pages1 to 6, an inside back cover and a ba
11、ck cover. This standard 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.BS3064:1978 BSI 08-1999 1 Section 1. General 1 Scope This British Standard specifies requirements for metric sine bars and s
12、ine tables, excluding compound tables. Section 2 provides for four types of sine bar, illustrated inFigure 1, made in sizes of 100mm,200mm and300mm. NOTEBars of50mm width and over are often referred to as sine plates. Section 3 provides for sine tables inclinable about a single axis in sizes of100mm
13、,200mm,300mm and500mm. 2 References The titles of the standards publications referred to in this standard are listed on the inside back cover. 3 Nomenclature and definitions For the purposes of this British Standard the nomenclature given inFigure 1 andFigure 2 has been adopted and the following def
14、initions apply. 3.1 designating size the center distances between the rollers 3.2 flatness tolerance the maximum distance between two parallel planes within which the surface under consideration shall lie 3.3 squareness tolerance of surfaces the distance between two parallel planes that are perpendi
15、cular to the plane in contact with the datum surface and within which the surface under consideration shall lie 3.4 parallelism tolerance of surfaces the distance between two planes that are parallel to the plane in contact with the datum surface and within which the surface under consideration shal
16、l lie Section 2. Sine bars 4 General design 4.1 The general form of the sine bars shall be basically in accordance with that shown for any one of the four types illustrated inFigure 1. 4.2 Precautions should be taken in the design to ensure that the method of attachment of the rollers does not disto
17、rt the sine bar or rollers in any way. NOTEWhen sine bars are provided with tapped holes, it is recommended that they be of M6 size. 5 Material and manufacture Sine bars, including rollers and hinge blocks, shall be made of high quality steel. Their surfaces shall have a hardness of not less than750
18、HV, when tested in accordance with BS427-1. The various items shall be given an adequate stabilizing treatment. 6 Finish All working surfaces of the items of the sine bar shall have a finely ground, or preferably lapped, finish in keeping with the tolerances specified in clause7. Non-working surface
19、s shall be clearly and permanently distinguishable by their type of finish. The rollers should be ground on centres to ensure freedom from lobbing. 7 Accuracy 7.1 Upper and lower surface 7.1.1 The whole of the upper surface of the bar and its lower surface, if a working surface, shall be flat within
20、 0.0015mm for100mm bars 0.002mm for200mm bars 0.003mm for300mm bars 7.1.2 The lower surface, if a working surface, shall be parallel to the upper surface to within 0.0015mm for100mm bars 0.002mm for200mm bars 0.003mm for300mm bars 7.2 Side faces. The side faces of the bars shall be: a) flat within 0
21、.004 mm for 100 mm bars 0.005 mm for 200 mm bars 0.006 mm for 300 mm bars; b) square to the upper surface of the bar within0.0025mm per25mm; c) square to the axis of the hinge roller within0.013mm per25mm measured in the plane common to the axes of the rollers. NOTEIn the case of type1 bars, require
22、ment c) applies to both rollers. 7.3 End faces. The end faces, when intended as working surfaces, shall be: a) flat within0.0025mm;BS3064:1978 2 BSI 08-1999 b) square to the upper surface of the bar within0.0025mm per25mm; c) parallel to the axis of the hinge roller within0.013mm per25mm. Figure 1 S
23、ine bars: types and nomenclatureBS3064:1978 BSI 08-1999 3 7.4 Setting and hinge rollers 7.4.1 Individual rollers shall be uniform in radius within0.002mm and straight over their length to the same accuracy. 7.4.2 The mean diameters of the rollers on bars of types1,2 and4 shall be equal to each other
24、 within0.0025min. 7.5 Roller axes 7.5.1 The distance between the roller axes shall everywhere agree with the designating size of the bars within 0.0025mm for100mm bars 0.005mm for200mm bars 0.008mm for300mm bars 7.5.2 For all sizes of bars, the roller axes shall lie in a common plane within0.002mm o
25、ver the length of either roller. 7.5.3 The upper surface, and the lower, if a working surface, shall be parallel to the plane tangent to the lower surface of the rollers within0.002mm. 7.5.4 In addition to complying with the foregoing requirements, a type3 sine bar shall also comply with the followi
26、ng requirements. a) The bearing surface of the setting foot and the hinge block shall be flat within0.0025mm. b) When a type3 bar is placed on a flat datum surface, it shall be free from rock and its upper surface, and lower surface, if a working surface, shall be parallel to the datum surface withi
27、n 0.0015mm for100mm bars 0.0020mm for200mm bars 0.0030mm for300mm bars 7.6 End and side fences. Sine bars may be supplied with end and side fences. The working surfaces of end and side fences shall be flat within0.005mm, when attached. 8 Protection 8.1 Each sine bar shall be supplied in a suitable c
28、ase, strongly constructed and designed to protect the working surface and prevent the ingress of dust. 8.2 All surfaces of the sine bar shall be protected against climatic conditions by being covered with a suitable corrosion preventive preparation. 9 Marking Each bar shall have legibly and permanen
29、tly marked upon it the following particulars: a) designating size of bar; b) the number of this British Standard (i.e.BS3064); c) an identification number; d) the manufacturers name or trade mark. NOTEThe mark BS3064 on the product is an indication by the manufacturer that the goods purport to compl
30、y with the requirements of this British Standard. Section 3. Sine tables inclinable about a single axis 10 General design 10.1 The essential features of a sine table inclinable about a single axis, as illustrated inFigure 2, are a base, provided with a slip gauge platform, and a work table having a
31、setting roller at one end and a hinge roller at the other. At least one end and one side fence shall be provided. Figure 2 Sine table: nomenclatureBS3064:1978 4 BSI 08-1999 10.2 The height of the slip gauge platform shall be such as to require the insertion of a setting slip gauge in order to bring
32、the upper surface of the work table parallel with the base. The size of the setting slip gauge shall be indicated and shall be not less than3mm. 10.3 The provision of tapped holes or tee slots in the work table for clamping purposes is an optional requirement. 10.4 When tapped holes are provided it
33、is recommended that they be M6 for tables up to and including300mm and M10 for the500mm table. The drilling and tapping operations should be carried out before the surface of the table is finished and the holes should be countersunk. 10.5 Where tee slots are provided, these should be in accordance w
34、ith BS2485 to take M6 bolt sizes for tables up to300mm andM10 bolt sizes for500mm tables. 11 Material and manufacture 11.1 General. The base, work table and fences shall be of close-grained plain, or alloy cast iron, in accordance with BS1452, grade180 or higher, or of steel. The material shall be s
35、ound and free from defects and the parts in question shall be given a suitable heat treatment to relieve internal stresses, or to harden and stabilize them, as appropriate. 11.2 Cast iron. Good quality close-grained plain, or alloy cast iron shall be used, sound and free from blow holes and porous p
36、atches. Minor defects in the top surface should be repaired by plugging with material of composition similar to the plate. 11.3 Steel. If made of steel, the base, work table and fences shall be hardened and stabilized; when finished, the working surfaces shall have a hardness of not less than750HV,
37、when tested in accordance with BS427-1. 11.4 Hinge and setting rollers. The hinge and setting rollers shall be of high quality steel. They shall be hardened and, when finished, shall have a hardness of not less than750HV, when tested in accordance with BS427-1. 12 Finish The quality of the workmansh
38、ip and finish shall conform to that customary for precision instruments of this class and shall conform to the tolerances shown inTable 1,Table 2 andTable 3. All working surfaces shall be finely ground or scraped; the hinge and setting rollers, after hardening, shall have a finely ground, or prefera
39、bly lapped, finish. Non-working surfaces shall be clearly and permanently distinguishable by their type of finish. 13 Rigidity In the horizontal position, the construction of the table shall be such that the deflection of the upper surface shall be not greater than the amount shown inTable 1 when th
40、e load shown is carried. Table 1 Angular deflection 14 Base The under surface of the base shall have not less than20% bearing area, evenly distributed, as shown by a rubbing test. When the base is placed on a grade A surface plate, the sine table shall not rock. 15 Accuracy 15.1 Gauge block platform
41、s. The flatness of the gauge block platform and its parallelism to the under surface of the base shall lie within two parallel planes, as shown inTable 2. Table 2 Parallelism of gauge block platform When two gauge platforms are provided they shall be co-planar within0.001mm. 15.2 Upper surface of th
42、e work table. The tolerances on flatness of the upper surface and its parallelism to the plane on which the sine table rests are given inTable 3. Table 3 Parallelism of upper surface 15.3 End and side faces. At least two adjacent faces of the table shall be: a) flat within0.005mm for100,200 and300mm
43、 tables;0.006mm for500mm tables; Designating size Load Angular deflection mm kg 100 200 300 500 5 10 15 25 4 4 4 4 Designating size Tolerance on parallelism mm mm 100 200 300 500 0.001 0.002 0.003 0.005 Designating size Tolerance on flatness and parallelism mm mm 100 200 300 400 0.004 0.004 0.005 0.
44、006BS3064:1978 BSI 08-1999 5 b) mutually square and square to the upper surface of the work table within0.0025mm per25mm; c) square or parallel to the axis of the hinge roller within0.013mm over the length of the roller. 15.4 Setting and hinge rollers. Individual rollers shall be uniform in radius w
45、ithin0.002mm and straight over their length to the same accuracy. 15.5 Roller axes 15.5.1 The distance between the roller axes shall everywhere agree with the designating size of the tables within 0.0025mm for100mm tables 0.005mm for200mm tables 0.006mm for300mm tables 0.013mm for500mm tables 15.5.2
46、 The roller axes shall be in a common plane within0.001mm per25mm length over the length of either roller. 15.5.3 The roller axes shall be parallel to, and equidistant from, the upper surface of the work table to within0.001mm per25mm length of roller. 15.6 End and side fences. The working surfaces
47、of end and side fences, when attached, shall be flat within0.005mm. 16 Protection 16.1 A suitable case or protective cover shall be provided. 16.2 All surfaces of the sine table shall be protected against climatic conditions by being covered with a suitable corrosion preventive preparation. 17 Marki
48、ng Each sine table shall have legibly and permanently marked upon it the following particulars: a) designating size of table; b) the number of this British Standard (i.e.BS3064); c) an identification number; d) the manufacturers name or trade mark. NOTEThe mark BS3064 on the product is an indication by the manufacturer that the goods purport to comply with the requirements of this British Standard.
