1、BRITISH STANDARD BS3641-1: 1971 Incorporating AmendmentNos. 1 and 2 Symbols for machine tools Part 1: General symbols UDC003.62:621.9BS3641-1:1971 This British Standard, having been approved by the MechanicalEngineering IndustryStandards Committee,was published underthe authority of the Executive Bo
2、ard on 31 March 1971 BSI 04-1999 First published, June 1963 First revision, issued as Part1 March, 1971 The following BSI references relate to the work on this standard: Committee reference MEE/6/18 Draft for comment68/10812 ISBN 580 06259 7 Co-operating organizations The Mechanical Engineering Indu
3、stry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: The industrial organizations marked with an asterisk in the above list, together with the following
4、, were directly represented on the committee entrusted with the preparation of this British Standard. Machine Tool Industry Research Association Associated Offices Technical Committee Gas Council Association of Consulting Engineers Institution of Civil Engineers Association of Mining Electrical and
5、Institution of Gas Engineers Mechanical Engineers Institution of Heating and Ventilating Board of Trade Engineers British Chemical Plant Manufacturers Institution of Mechanical Engineers Association Institution of Mechanical Engineers British Compressed Air Society (Automobile Division) British Elec
6、trical and Allied Manufacturers Institution of Production Engineers* Association Locomotive and Allied Manufacturers British Gear Manufacturers Association Association of Great Britain British Internal Combustion Engine London Transport Board Manufacturers Association Machine Tool Trades Association
7、* British Mechanical Engineering Ministry of Defence Confederation Ministry of Defence, Army Department British Pump Manufacturers Association Ministry of Power British Steel Industry Ministry of Public Building and Works Crown Agents for Oversea Governments and Ministry of Technology Administration
8、s Ministry of Technology National Department of Employment and Productivity Engineering Laboratory (H.M. Factory Inspectorate) Ministry of Transport Electricity Council, the Central Electricity National Coal Board Generating Board and the Area Boards in National Physical Laboratory (Ministry of Engl
9、and and Wales Technology) Engineering Equipment Users Association Royal Institute of British Architects Amendments issued since publication Amd. No. Date Comments 1310 February 1974 3974 June 1982 Indicated by a sideline in the marginBS3641-1:1971 BSI 04-1999 i Contents Page Co-operating organizatio
10、ns Inside front cover Foreword ii 0 General 0.1 Scope 1 0.2 Sizes and proportions 1 0.3 The use of the arrow 1 0.4 The grouping of symbols 2 Section 1. Modes 3 Section 2. Elements 9 Section 3. Values 13 Section 4. Actions 15 Section 5. Safety and status indications 17 Section 6. Compound symbols 18
11、Appendix A Examples of the grouping of symbols 23 Figure 1 Grinding spindle, revolutions per minute and feed per minute 23 Figure 2 Plate adjacent to a lever showing the feed in either direction 23 Figure 3 Engaging feed and disengaging feed 24 Figure 4 Presentation and withdrawal of tapping spindle
12、 with respect to workpiece 24 Figure 5 Lever controlling table traverse with disengaging point and with varying feed positions in each direction longitudinally 24 Figure 6 Application of symbols to plate showing a wide range of functions 25BS3641-1:1971 ii BSI 04-1999 Foreword This standard makes re
13、ference to the following BritishStandards: BS381C, Specification for colours for identification, coding and special purposes. BS2917, Graphical symbols for use in diagrams for hydraulic and pneumatic systems. BS4099, Colours and their meaning when used for indicator lights, annunciators and digital
14、readouts in industrial installations. BS5378, Safety signs and colours. BS5378-1, Specification for colour and design. This British Standard has been prepared under the authority of the Mechanical Engineering Industry Standards Committee. The first edition of this standard was published in 1963. In
15、addition to the symbols which appeared in ISO Recommendation R 369, “Symbols for indications appearing on machine tools”, it also included a number of additional items as a result of comments from members of the British Machine Tool Industry. This second edition has been produced as the result of a
16、request from the Machine Tool Trades Association. The range of national symbols has been increased to cater for present day developments. Some of the additional symbols are new British ones, whilst others have been adopted from overseas standards. The symbols are grouped and numbered in sections, th
17、us allowing for any future extensions which experience may show to be necessary. It is emphasized that all the sketches show basic symbols only. In many cases it will be found advantageous to carry out the grouping of certain symbols on instruction plates. Such grouping is entirely related to indivi
18、dual requirements and therefore this standard makes no attempt to specify which groupings should be used, although examples are shown for guidance purposes in Appendix A. It is important to note, however, that in all cases only the standard basic symbols should be used within any group. Symbols repr
19、esenting elements may be replaced by others similar but nearer the actual shape of the machine element. Symbols relating to pneumatic and hydraulic connections are omitted from this standard because they fall within the scope of BS 2917 1) , which deals with graphical symbols for fluid power transmi
20、ssion. A subsequent Part of this standard will deal with additional symbols particularly required for numerically controlled machine tools. This standard was amended in 1982 to take account of the requirements of BS5378-1:1980 2)and the Safety Signs Regulations, 1980 (SI 1980, No. 1471), because mac
21、hine tools are used in places of work where the requirements of these regulations apply. Symbols in this standard are intended primarily for purposes of operator information, but where a symbol is used for safety reasons attention is also drawn to BS 5378-1. A British Standard does not purport to in
22、clude 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. Summary of pages This document comprises a front cover, an inside front cover, pag
23、es i and ii, pages1 to25 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover. 1) BS 2917, “Graphical symbols for use in diagrams for hydraulic and pneumatic systems”. 2)
24、 BS 5378-1, “Safety signs and colours, Part 1. Specification for colour and design”BS3641-1:1971 BSI 04-1999 1 0 General 0.1 Scope This British Standard specifies basic designs for symbols intended for use on machine tools. Drawings in this standard relate to the form of symbols only and are not abs
25、olute dimensional representations. The standard makes recommendations for proportions to be used in the design of symbols, independent of actual dimensions. The standard provides for the grouping together of symbols selected from the same or different sections of the standard according to individual
26、 requirements. Examples of groupings of symbols are given in Appendix A for guidance purposes. 0.2 Sizes and proportions The symbols shown in this standard are accurately reproduced at basic size to a0.8mm grid. Where it is necessary to establish actual sizes then the symbols shown may be measured u
27、sing a0.8mm transparent grid. The absolute size of symbol is at the designers discretion and indeed it may be desirable to have symbols in two different basic sizes to achieve proper display balance; again, when using two different basic sizes the proportions shown here will give a consistent appear
28、ance within each of the two size ranges selected. The symbols have been designed using a basic reference grid of5units by5units where1unit = 0.8mm. Each symbol is built up so that, with only a few exceptions, the symbol is circumscribed by rectangles which are modular with respect to the5 unit grid,
29、 e.g.5 10,10 15,10 40. In no case does the largest dimension of a symbol exceed40 units. The normal line thickness is0.8mm; where it has proved necessary to depart from the standard0.8mm line thickness this is immediately apparent. In certain symbols, points and circles need to appear in contact wit
30、h one another. However, if reproduced touching (no matter which method of reproduction is used) blurring of points and fusing of tangential circles would occur. To minimize these effects, certain symbols show a small but deliberate clearance of0.4unit between some of the constituent elements of the
31、symbol. 0.3 The use of the arrow The arrow shape is a unique symbol in relation to all of the symbols in this standard and thus deserves special consideration on its own. It rarely appears as an isolated element, but is frequently used as the basis for a symbol, or qualifies another symbol to give i
32、t additional meaning. There are four different applications using the arrow shape and it is desirable to use a different form in each of these instances: directional information, relative motion information, dimensional information, functional information. 0.3.1 Directional information arrows. 0.3.2
33、 Relative motion information. 0.3.3 Dimension arrows. The recommended form of a directional arrow is shown on the right, the important dimensions being the shape and proportion of the head and the associated width of the shaft. Overall length is not crucial and may be varied to accommodate situation
34、s where the arrow is graphically combined with other symbol parts. The curved form is for rotational information, the perspective view being superimposed on a shaft representation. Where it is not possible to define exactly the direction in space it is often useful to define relative motion between
35、two machine parts; in this case the truncated arrow heads are used in pairs to define “in” (or towards) and “out” (or away from). For symbols where dimensional concepts are required, an open headed arrow with no shaft is used.BS3641-1:1971 2 BSI 04-1999 0.3.4 Functional arrows. 0.4 The grouping of s
36、ymbols It is comparatively rare for a single symbol to be used in isolation. The grouping of symbols on displays is implicit in their application. These groupings generally fall into one of three types of association. 1) Hierarchical arrangements. One symbol serves as a general label or heading for
37、a further more detailed group of symbols, e.g. 2) Pairing of symbols to build more complex symbol, e.g. transverse feed; engage tracer 3) Association of symbol with value or quantity, e.g.feed X mm per revolution 0.4.1 Classification To facilitate and rationalize these combinations, the standard has
38、 been structured as follows. Section 1. Modes Section 2. Elements Section 3. Values Section 4. Actions Section 5. Safety and status indications These categories may need to be expanded in future to accommodate new symbols, especially for numerical control. Section 6. Compound symbols This shows some
39、 of the derived symbols which are directly related to the basic set. These show some of the more common symbol combinations, but in theory any combination is possible. Many symbols require a functional dynamic in the form of an arrow to improve their ease of interpretation. It is inappropriate to us
40、e the same arrow form as is used to define spatial directions, as the arrow shown on such symbols need not imply a specific direction. A heavier, bolder form of functional arrow is used in these cases. pump worktable start stop clockwise anticlockwiseBS3641-1:1971 BSI 04-1999 3 Section 1. Modes The
41、modes are categorized under four sub-headings. 1.1 Operating modes major machining functions. 1.2 Movement modes: defining the nature of linear and rotational motions. The direction in space is derived from the primary definition of directions in the introductory section and the element symbol to wh
42、ich the movement mode applies is combined with the movement mode symbol. 1.3 Control modes: these define the manner in which the machine or element is controlled. 1.4 Auxiliary modes: these define sub-functions which support major machining functions.1.1 Operating modes 1.1Operating modes (continued
43、) No. Designation Symbol Remarks 1.1.1 Feed 1.1.2 Drilling 1.1.3 Threading 1.1.4 Turning 1.1.5 Boring 1.1.6 Conventional milling 1.1.7 Climb millingBS3641-1:1971 4 BSI 04-1999 No. Designation Symbol Remarks 1.1.8 Reaming 1.1.9 Grinding 1.1.10 Planing For shaping, associate arrow with tool instead of
44、 workpiece. 1.1.11 Tapping Threads may be inclined to show either r.h. or l.h. 1.1.12 Copying 1.1.13 Parting off 1.1.14 Vertical millingBS3641-1:1971 BSI 04-1999 5 1.2 Movement modes No. Designation Symbol Remarks 1.2.1 Rectilinear motion 1.2.2 Rectilinear motion in two directions 1.2.3 Interrupted
45、rectilinear motion (jog) In two directions a 1.2.4 Limited rectilinear motion In two directions a 1.2.5 Limited rectilinear motion and return 1.2.6 Oscillating rectilinear motion May be amplified ato indicate overtravel by using extension of arrow, e.g. 1.2.7 Direction of continuous rotation 1.2.8 R
46、otation in two directions 1.2.9 Interrupted rotation In two directions a 1.2.10 Limited rotation In two directions a 1.2.11 Limited rotation and return 1.2.12 Oscillating rotation May be amplified ato indicate overtravel by using extension of arrow, e.g. a Not included in ISO Recommendation.BS3641-1
47、:1971 6 BSI 04-1999 1.2 Movement modes (continued)1.3 Control modes No. Designation Symbol Remarks 1.2.13 Dwell a 1.2.14 Rapid traverse 1.2.15 Feed per stroke a a Not included in ISO Recommendation. No. Designation Symbol Remarks 1.3.1 Automatic a Where a specified number of cycles x is required, it
48、 may be placed where shown 1.3.2 Manual 1.3.3 One cycle a 1.3.4 Magnetic a a Not included in ISO Recommendation. pBS3641-1:1971 BSI 04-1999 7 1.4 Auxiliary modes No. Designation Symbol Remarks 1.4.1 Coolant mist 1.4.2 Coolant flood 1.4.3 Material feed a 1.4.4 Gauge size external a 1.4.5 Gauge size i
49、nternal a 1.4.6 Truing dressing a 1.4.7 Crush dressing a 1.4.8 Lubricant-oil a Not included in ISO Recommendation.BS3641-1:1971 8 BSI 04-1999 1.4 Auxiliary modes(Continued) No. Designation Symbol Remarks 1.4.9 Lubricant-grease a 1.4.10 Hydraulic 1.4.11 Filling 1.4.12 Draining 1.4.13 Blowing unit 1.4.14 Suction unit 1.4.15 Work area illumination b 1.4.16 Maintenance a 1.4.17 Refer to instruction book a a Not included in ISO Recommendation. b Differs from ISO symbol, which takes the form of a light bulb.BS3641-1:1971 BSI 04-1999 9 Section 2.
