1、BSI Standards PublicationBS ISO 6535:2015Portable chain-saws Chainbrake performanceBS ISO 6535:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 6535:2015. It supersedes BS ISO 6535:2008 which is withdrawn.The UK participation in its preparation was entruste
2、d to Technical Committee AGE/29, Forestry machinery.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The Britis
3、h Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 78917 5 ICS 65.060.80 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 Septe
4、mber 2015.Amendments/corrigenda issued since publicationDate Text affectedBS ISO 6535:2015 ISO 2015Portable chain-saws Chain brake performanceScies chane portatives Performance du frein de chaneINTERNATIONAL STANDARDISO6535Fourth edition2015-08-15Reference numberISO 6535:2015(E)BS ISO 6535:2015ISO 6
5、535:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
6、 or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fa
7、x +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 6535:2015ISO 6535:2015(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Test objects . 15 Apparatus . 16 Chain-saw preparation . 27 Procedure. 27.1 Release force (static test) . 27.2 Braking time 27.2.1 General 27.2.2 Fi
8、rst measurement of braking times (in new condition) 37.2.3 Preliminary running . 37.2.4 Second measurement of braking times 37.2.5 Interim actuations 37.2.6 Third measurement of braking times 38 Report 38.1 Braking time 38.2 Release force . 38.3 Chain lubrication oil . 3 ISO 2015 All rights reserved
9、 iiiContents PageBS ISO 6535:2015ISO 6535:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each m
10、ember body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
11、Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different typ
12、es of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be
13、 held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is inform
14、ation given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the
15、 following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 23, Tractors and machinery for agriculture and forestry, Subcommittee SC 17, Manually portable forest machinery.This fourth edition cancels and replaces the third edition (ISO 6535:2008), which
16、has been technically revised.iv ISO 2015 All rights reservedBS ISO 6535:2015INTERNATIONAL STANDARD ISO 6535:2015(E)Portable chain-saws Chain brake performance1 ScopeThis International Standard specifies methods for measuring the braking time and release force of manually operated chain brakes on por
17、table hand-held chain-saws.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced doc
18、ument (including any amendments) applies.ISO 6531, Machinery for forestry Portable chain-saws VocabularyISO 6533:2012, Forestry machinery Portable chain-saw front hand-guard Dimensions and clearances3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 6531
19、 and the following apply.3.1braking timeinterval from the instant the pendulum hits the guard to when the saw chain is considered to have stopped4 Test objectsThe measurements shall be carried out on three different new production saws of the same model, equipped with guide bar and saw chain with th
20、e largest diameter drive sprocket as recommended by the manufacturer.5 Apparatus5.1 Rotational speed indicator, with a rotating speed reading accuracy of 2,5 % of the indicated value.5.2 Time recording device, including pick-ups, having an accuracy of 2,5 ms.5.3 Pick-up device, for registering the b
21、rake arm activation.5.4 Pick-up device, for registering the saw chain motion.5.5 Force gauge, having an accuracy of 1 N.5.6 Pendulum, having a head with a flat strike face of 50 mm 1 mm diameter and an arm with a length giving 700 mm 5 mm distance between the swivel point and the centre of the head
22、(see Figure 1). The arm shall be as light as possible. The pendulum shall cause an impact energy of 1,4 J 0,2 J from a drop height (see Figure 1) of 200 mm 5 mm. Sharp edges on the pendulum shall be chamfered. ISO 2015 All rights reserved 1BS ISO 6535:2015ISO 6535:2015(E)6 Chain-saw preparationThe e
23、ngine shall have been run in and warmed up for 3 min at maximum power speed before the test and the carburettor and ignition (if applicable) adjusted according to the manufacturers instructions.The chain-saw and saw chain tension shall be adjusted for best cutting performance in accordance with the
24、manufacturers recommendations. If nothing else is stated, the saw chain tension shall be adjusted so that, when a 0,9 kg mass is hanging from the centre of the usable cutting length along the lower portion of the saw chain, the gap between the saw chain side link and the bar is a maximum of 0,017 mm
25、 per millimetre of bar cutting length. The saw chain should move freely on the bar by applying moderate hand pressure.If applicable, the chain oil pump shall be adjusted to its maximum setting according to the manufacturers recommendations. The type of chain lubrication oil used shall be noted in th
26、e test report.7 Procedure7.1 Release force (static test)The engine shall not be run during this test.Measure the force needed to activate the brake on the top of the front hand-guard (see Figure 2) at the midpoint of the effective guard width W1 as described in ISO 6533:2012, 7.1. The force shall be
27、 applied at a uniform rate. Repeat this measurement twice for a total of three measurements.For each chain-saw, the release force shall be measured before and after the measurement of chain braking time (see 7.2) and the results of both series of measurements shall be reported.7.2 Braking time7.2.1
28、GeneralKeep the throttle in a fixed position during the braking. This position shall correspond to the racing speed defined as the manufacturers rated speed for maximum power plus 33 % or full throttle, whichever is the lesser. When the saw chain has stopped after braking, adjust the throttle to idl
29、ing immediately and reset the brake. All tests in which the speed exceeds or is below the racing speed tolerances shall be omitted and repeated.The saw chain has ceased to move, after activation of the chain brake, when the time taken for two successive chain drive links or sprocket teeth to pass th
30、e measuring point exceeds 5 msNo brake adjustment of any kind and no cleaning shall be carried out during the test.The saw shall be rigidly mounted by the handles during the test.The brake shall be released with a blow from the pendulum (5.6), which shall strike the front hand-guard at the midpoint
31、of the effective guard width W1 as described in ISO 6533:2012, 7.1 and from the drop height causing an impact energy of 1,4 J 0,2 J and along a line of action forming an angle of 45 5 with the axis of the guide-bar (see Figure 1).Carry out the test according to steps 7.2.2 to 7.2.6.To avoid overheat
32、ing, the time interval between each actuation of the chain brake shall be at least 30 s and the throttle trigger shall always be deactivated immediately after the chain has stopped after braking.2 ISO 2015 All rights reservedBS ISO 6535:2015ISO 6535:2015(E)7.2.2 First measurement of braking times (i
33、n new condition)Run the engine at racing speed 5 r/s (300 rpm) and carry out five actuations of the brake. Record the braking times.7.2.3 Preliminary running7.2.3.1 Perform 300 actuations of the chain brake at an engine speed between maximum power speed and racing speed. Braking times will not be re
34、corded.7.2.3.2 Cut softwood for the time it takes to use one tankful of fuel at approximately maximum power speed. The chain brake shall not be activated during this cutting. No cleaning of the chain saw is permitted during and after this cutting sequence. Check chain tension and adjust if necessary
35、 according to Clause 6.7.2.4 Second measurement of braking timesRun the engine at racing speed 5 r/s (300 rpm) and carry out five actuations of the brake. Record the braking times.7.2.5 Interim actuationsRun the engine at racing speed 5 r/s (300 rpm) and carry out 15 actuations of the brake. Braking
36、 times will not be recorded.7.2.6 Third measurement of braking timesRun the engine at racing speed 5 r/s (300 rpm) and carry out five actuations of the brake. Record the braking times.8 Report8.1 Braking timeReport all recorded braking times and determine the average value of the 10 measurements of
37、7.2.4 and 7.2.6 in milliseconds.8.2 Release forceReport the six recorded release forces in Newtons.8.3 Chain lubrication oilReport the type of chain lubrication oil used during the tests. ISO 2015 All rights reserved 3BS ISO 6535:2015ISO 6535:2015(E)Dimensions in millimetresaaPendulum drop height.Fi
38、gure 1 Impact direction and pendulumFigure 2 Measuring direction for release force, F4 ISO 2015 All rights reservedBS ISO 6535:2015BS ISO 6535:2015ISO 6535:2015(E) ISO 2015 All rights reservedICS 65.060.80Price based on 4 pagesThis page deliberately left blankBSI is the national body responsible for
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