BS 5344-1985 Methods for performance tests for rotary and percussive pneumatic tools《旋转和冲击气动工具的性能试验方法》.pdf

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1、BRITISH STANDARD CONFIRMED OCTOBER 1990 BS 5344:1985 ISO 2787:1984 Methods for Performance tests for rotary and percussive pneumatic tools UDC 621.542:620.16BS5344:1985 This British Standard, having been prepared under the directionof the Mechanical Engineering Standards Committee, was published und

2、erthe authority of the BoardofBSI and comes intoeffecton 31 January 1985 BSI 10-1999 First published November 1976 First revision January 1985 The following BSI references relate to the work on this standard: Committee reference MEE/39 Draft for comment 82/78409 DC ISBN 0 580 14342 2 Committees resp

3、onsible for this British Standard The preparation of this British Standard was entrusted by the Mechanical Engineering Standards Committee (MEE/-) to Technical Committee MEE/39 upon which the following bodies were represented: BEAMA Ltd. British Compressed Air Society British Gas Corporation Constru

4、ction Plant-hire Association Department of Trade and Industry (National Engineering Laboratory) Electricity Supply Industry in England and Wales Energy Industries Council Health and Safety Executive Imperial College of Science and Technology Institute of Marine Engineers Institution of Gas Engineers

5、 Institution of Mechanical Engineers Institution of Mining and Metallurgy Institution of Mining Engineers Ministry of Defence National Coal Board South Wales Institute of Engineers Amendments issued since publication Amd. No. Date of issue CommentsBS5344:1985 BSI 10-1999 i Contents Page Committees r

6、esponsible Inside front cover National foreword ii 0 Introduction 1 1 Scope and field of application 1 2 References 1 3 Definitions 1 4 Symbols and units 2 5 Classification of pneumatic tools 3 6 Methods for measurement of tool performance data 4 Annex A Format for pneumatic tools test report Rotary

7、 tool 8 Annex B Format for pneumatic tools test report Percussive tool 9 Annex C Procedure for measurement of impact energy by the strain gauge method 11 Figure 1 Use of air receiver 5 Figure 2 Incident strain wave 13 Figure 3 Strain gauge arrangement 15 Publications referred to Inside back coverBS5

8、344:1985 ii BSI 10-1999 National foreword This revision of BS 5344, which has been prepared under the direction of the Mechanical Engineering Standards Committee, supersedes BS 5344:1976 which is withdrawn, it is identical with ISO 2787:1984, “Rotary and percussive pneumatic tools Performance tests”

9、 which was prepared by Technical Committee ISO/TC29, Small tools, of the International Organization for Standardization (ISO) and in the development of which the United Kingdom played an active part. The title of BS 5344 now refers to performance tests to reflect the corresponding change in the titl

10、e of the second edition of ISO 2787. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention i

11、s drawn especially to the following. The comma has been used as a decimal marker for metric dimensions. In BritishStandards it is current practice to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard, they should be

12、 read as “British Standard”. The Technical Committee has reviewed the provisions of ISO 2944, to which reference is made in the text, and has decided it is acceptable for use in conjunction with this standard. There is no corresponding British Standard for ISO 5391 which is at draft stage. Cross ref

13、erences International Standard Corresponding British Standard ISO 31 BS 5775 Specification for quantities, units and symbols (Identical) ISO 1000:1981 BS 5555:1981 Specification for SI units and recommendations for the use of their multiples and of certain other units (Identical) ISO 1180:1983 a BS

14、673:1984 Specification for shanks for pneumatic tools and fitting dimensions of chuck bushings (Identical) ISO 3857-1:1977 BS 5791 Glossary of terms for compressors, flow in pneumatic tools and machines Part 1:1979 General (Identical) ISO 3857-3:1979 Part 3:1984 Pneumatic tools and machines (Identic

15、al) ISO 5167:1980 BS 1042 Methods of measurement of fluid closed conduits Part 1.1:1981 Orifice plates, nozzles and Venturi tubes inserted in circular cross-section conduits running full (Technically equivalent) ISO 5393:1981 BS 6292:1982 Method for evaluation of performance of rotary pneumatic asse

16、mbly tools for threaded fasteners (Identical) ISO 6544:1981 BS 6268:1982 Method of measurement for reaction torque and torque impulse from hand-held pneumatic assembly tools for installing threaded fasteners (Identical) a Footnote 1) on page 1 is invalid as the revision of ISO/R 1180 was published i

17、n 1983.BS5344:1985 BSI 10-1999 iii 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 does not of itself confer immunity from legal obligations. Summar

18、y of pages This document comprises a front cover, an inside front cover, pagesi toiv, pages1to16, an inside back cover 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 the inside front cov

19、er.iv blankBS5344:1985 BSI 10-1999 1 0 Introduction This International Standard shows how information on hand-held pneumatic rotary tools, percussive tools and percussive tools with rotation should be obtained and presented. Such information is valuable for the following purposes: a) to enable manuf

20、acturers of pneumatic rotary and percussive tools to offer their products under similar technical specifications; b) to help users to compare different tools and to select the right type and size for a specific task; c) to instruct test personnel about how performance tests shall be carried out, acc

21、ording to specified conditions described in this International Standard. 1 Scope and field of application This International Standard specifies a method of performance tests and technical conditions for the supply of pneumatic tools and gives detailed instruction on the measurement of power output a

22、nd air consumption and means of adjusting the measured values to specified conditions. 2 References ISO 31, Quantities, units and symbol. ISO 1000, SI units and recommendations for the use of their multiples and of certain other units. ISO 1180, Shanks for pneumatic tools and fitting dimensions of c

23、huck bushings 1) . ISO 2944, Fluid power systems and component Nominal pressures. ISO 3857-1, Compressors, pneumatic tools and machines Vocabulary Part 1: General. ISO 3857-3, Compressors, pneumatic tools and machines Vocabulary Part 3: Pneumatic tool and machines. ISO 5167, Measurement of fluid flo

24、w by means of orifice plates, nozzles and Venturi tubes inserted in circular cross-section conduits running full. ISO 5391, Compressors, pneumatic tools and machines Classification 2) . ISO 5393, Rotary pneumatic tools for threaded fasteners Performance test. ISO 6544, Hand-held pneumatic assembly t

25、ools for installing threaded fasteners Reaction torque and torque impulse measurements. 3 Definitions 3.1 Definitions of some general physical terms 3.1.1 total pressure the pressure measured on the stagnation point when a moving gas stream is brought to rest and its kinetic energy is converted by a

26、n isentropic compression from the flow condition to the stagnation condition. It is the pressure usually measured by a Pitot tube. In a stationary body of gas the static and the total pressures are numerically equal 3.1.2 static pressure the pressure measured in a gas in such a manner that no effect

27、 on measurement is produced by the gas velocity 3.1.3 dynamic (velocity) pressure the total pressure minus the static pressure 3.1.4 atmospheric pressure the absolute pressure of the atmosphere measured at the test place 3.1.5 gauge (effective) pressure the pressure measured above the atmospheric pr

28、essure 3.1.6 absolute pressure the pressure measured from absolute zero, i.e. from an absolute vacuum. It equals the algebraic sum of atmospheric pressure and gauge pressure 3.1.7 free air air at the atmospheric conditions of the site 3.1.8 total temperature the temperature which would be measured a

29、t the stagnation point if a gas stream were brought to rest and its kinetic energy converted by an isentropic compression from the flow condition to the stagnation condition the temperature rise at stagnation of the gas stream can be neglected if the gas velocity around the measuring point is lower

30、than 30 m/s 1) At present at the stage of draft. (Revision of ISO/R 1180:1970.) 2) At present at the stage of draft.BS5344:1985 2 BSI 10-1999 3.2 Definitions concerning rotary air motor torque performance 3.2.1 static starting torque the torque that continues to be developed by the motor in response

31、 to an application of fluid pressure when the torque load is sufficient to prevent rotation NOTEThe value may depend upon the angular position of the motor shaft. The maximum static starting torque is the value obtained when the angular position of the motor shaft is in the most advantageous locatio

32、n. The minimum static starting torque is the value obtained when the angular position of the motor shaft is in the least advantageous location. 3.2.2 dynamic starting torque the peak torque delivered by the output shaft of the motor in response to an application of fluid pressure when the torque loa

33、d is sufficient to prevent rotation NOTEThe dynamic starting torque will often be in excess of the static starting torque where lost motion exists between the motor shaft and the load, allowing rotation and momentum to develop prior to application of the load. 3.2.3 brake loaded torque the continuou

34、s torque delivered at a constant speed 3.2.4 maximum brake loaded torque the maximum continuous torque that can be delivered at a constant speed 3.2.5 static stall torque the torque that continues to be developed after a load has stalled the motor NOTEThe value may depend upon the angular position o

35、f the motor shaft in the stalled position. The maximum static stall torque is the value obtained when the angular position of the motor shaft is in the most advantageous location. The minimum static stall torque is the value obtained when the angular position of the motor shaft is in the least advan

36、tageous location. 3.2.6 dynamic stall torque the peak torque delivered by the output shaft when a load is applied that stalls the motor NOTEThe peak torque will vary, depending upon the rate of deceleration caused by the load. 4 Symbols and units These are in accordance with ISO 31 and ISO 1000. 4.1

37、 General rules for letter symbols The use of the letter symbols given in 4.2 and 4.3 is recommended. The list is formulated in line with the following seven principles: a) the same symbols shall be used for the same quantities regardless of the system of units; b) for any one quantity a single symbo

38、l shall be used with subscripts to indicate readings other than the primary one; c) the same symbols shall be used for a given concept regardless of the number of special values which occur; d) letter subscripts shall be used to denote values under special conditions; e) numerical subscripts shall b

39、e used to denote values at different points of a cycle; f) symbols shall be confined if possible to roman letters; g) where possible, capital letters shall be used for absolute quantities. 4.2 Letter symbols and units Symbol Quantity Unit D Piston diameter mm d Pipe or hose internal diameter mm e Im

40、pact J F Force N L Length m or mm M Torque Nm m Mass kg P Power kW N Number of tools n Shaft speed min 1 f Blow rate Hz p Absolute pressure bar a p e Gauge pressure (effective pressure) p e= p p b bar p b Atmospheric pressure bar q V Volume flow rate l/s s Standard deviation S Stroke mm a 1 bar = 10

41、 5Pa.BS5344:1985 BSI 10-1999 3 4.3 Subscripts 5 Classification of pneumatic tools 5.1 Description of the pneumatic tools 5.2 Tool performance data 5.3 Data to be given for different types of tool In principle, all data in accordance with 5.1 and 5.2 which are applicable to the pneumatic tool under c

42、onsideration shall be given in the description of the tool. 0 Ambient conditions av Average value max Maximum value min Minimum value s Starting conditions (n or f = 0) i No-load conditions P Conditions at stated power output Symbol Explanatory comments 5.1.1 Type of pneumatic tool Manufacturers typ

43、e designation 5.1.2 Standard equipment Pneumatic tool including tool holder as well as all devices for the prevention of accidents and noise but without working tools, coupling hose fitting, hose and support 5.1.3 Mass of the pneumatic tool m Mass of the normally equipped tool defined as in 5.1.2 5.

44、1.4 Dimensions of the pneumatic tool In all cases the overall length of the pneumatic tool will be shown together with such other dimensions as are appropriate to the particular type of pneumatic tool 5.1.5 Piston diameter and mass D m p Dimension of the striking piston at its largest outside diamet

45、er and its mass 5.1.6 Theoretical piston stroke S Possible axial movement of the piston in the working chamber with the tool shank fully inserted 5.1.7 Recommended hose, inner diameter and length d L h Smallest inside diameter and length of the supply hose and of the necessary fittings Explanatory c

46、omments 5.1.8 Type and dimensions of the working tool According to ISO 1180 5.1.9 Tool shank and chuck bushing According to ISO 1180 5.1.10 Tool retainer 5.1.11 Special and optional features Flushing, dry suction, etc. Symbol 5.2.1 Compressed air pressure for which test data are valid (recommended c

47、ompressed air pressure) p 5.2.2 Power output P 5.2.3 Air consumption at given power output q VP 5.2.4 Air consumption, no-load q Vi 5.2.5 Rotational speed at given power output n P 5.2.6 Torque at given power output M P 5.2.7 Starting torque maximum M smax minimum M smin NOTEIt should be clearly sta

48、ted which starting torque is referred to according to 3.2. 5.2.8 Rotational speed under no-load or blow rate under no-load n i f i 5.2.9 Impact energy e 5.2.10 Blow rate f 5.2.11 Maximum tightening torque M eBS5344:1985 4 BSI 10-1999 5.3.1 Percussive pneumatic tools without rotation 5.3.2 Percussive

49、 pneumatic tools with rotating device (for example, rock drills) 5.3.3 Rotary pneumatic tools 5.3.4 Pneumatic screwdrivers and nutrunners 6 Methods for measurement of tool performance data 6.1 General rules for performance test on pneumatic tools 6.1.1 All measurements carried out in compliance with this International Standard shall be performed by competent persons and with accurate instrumentation which is calibrated against existing standards or standard methods. Type of pneumatic tool (5.1.1) Standard equipment (5.1.2) Mass of the