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1、BS ISO 13772:2009 ICS 65.060.80 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Forestry machinery Portable chain- saws Non-manually actuated chain brake performance Licensed CopyChinese University of Hong Kong, 13/06/2009 08:21, Uncontrolled Copy, (c) BSI Thi
2、s British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2009 BSI 2009 ISBN 978 0 580 62714 9 Amendments/corrigenda issued since publication DateComments BS ISO 13772:2009 National foreword This British Standard is the UK implementation of ISO 137
3、72:2009. It supersedes BS ISO 13772:1997 which is withdrawn. The UK participation in its preparation was entrusted 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 t
4、o include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Licensed CopyChinese University of Hong Kong, 13/06/2009 08:21, Uncontrolled Copy, (c) BSI BS ISO 13772:2009 Refe
5、rence number ISO 13772:2009(E) ISO 2009 INTERNATIONAL STANDARD ISO 13772 Third edition 2009-04-15 Forestry machinery Portable chain- saws Non-manually actuated chain brake performance Matriel forestier Scies chane portatives Performance du frein de chane automatique Licensed CopyChinese University o
6、f Hong Kong, 13/06/2009 08:21, Uncontrolled Copy, (c) BSI BS ISO 13772:2009 ISO 13772:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded ar
7、e licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Detail
8、s of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem rel
9、ating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including ph
10、otocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in S
11、witzerland ii ISO 2009 All rights reserved Licensed CopyChinese University of Hong Kong, 13/06/2009 08:21, Uncontrolled Copy, (c) BSI BS ISO 13772:2009 ISO 13772:2009(E) ISO 2009 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 1 4 Perf
12、ormance requirements 1 5 Principle. 2 6 Test equipment . 2 7 Preparation 3 8 Test procedure 4 9 Test report . 4 Annex A (normative) Frequency range and low-pass filter characteristics. 7 Bibliography. 9 Licensed CopyChinese University of Hong Kong, 13/06/2009 08:21, Uncontrolled Copy, (c) BSI BS ISO
13、 13772:2009 ISO 13772:2009(E) iv ISO 2009 All rights reserved Foreword ISO (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 comm
14、ittees. Each member 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
15、International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft Internation
16、al Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be th
17、e subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 13772 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, Subcommittee SC 17, Manually portable forest machinery. This third edition cancel
18、s and replaces the second edition (ISO 13772:2004), which has been technically revised. In particular, pre-running of the chain-saw before testing is now specified, a specification for the rocker has been added, and additional advice is given on attachment point A for tree-service chain-saws. Licens
19、ed CopyChinese University of Hong Kong, 13/06/2009 08:21, Uncontrolled Copy, (c) BSI BS ISO 13772:2009 INTERNATIONAL STANDARD ISO 13772:2009(E) ISO 2009 All rights reserved 1 Forestry machinery Portable chain-saws Non-manually actuated chain brake performance 1 Scope This International Standard spec
20、ifies a method for checking the functioning and performance of the non-manually actuated chain brake on a portable hand-held chain-saw used for forest or tree service. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated referenc
21、es, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 6531, Machinery for forestry Portable chain-saws Vocabulary 3 Terms and definitions For the purposes of this document, the terms and definitions given in
22、ISO 6531 apply. 4 Performance requirements The non-manually actuated chain brake function shall be checked on a normal production saw equipped with the shortest and longest guide bars specified in the instruction handbook. When tested in accordance with Clause 8, the performance of the actuation fun
23、ction of a non-manually actuated chain brake is considered acceptable if each of the horizontal and vertical acceleration levels, ax and ay, at which the chain brake actuates is below the appropriate threshold level according to Figure 1 a), b) or c), depending on chain-saw type and size. Licensed C
24、opyChinese University of Hong Kong, 13/06/2009 08:21, Uncontrolled Copy, (c) BSI BS ISO 13772:2009 ISO 13772:2009(E) 2 ISO 2009 All rights reserved a) Chain-saw for tree service b) Chain-saw for forest service with u u 40 cm3 engine displacement c) Chain-saw for forest service with 40 cm3 engine dis
25、placement Key ax horizontal acceleration, m/s2 ay vertical acceleration, m/s2 A acceptable NA not acceptable Figure 1 Threshold level for actuation of non-manually actuated chain brakes 5 Principle The chain-saw shall be mounted on a test rig as shown in Figure 2. The drop mass falls from a defined
26、height on the rocker and accelerates the chain-saw on the opposite side. The drop height shall be increased until actuation of the non-manually actuated chain-brake occurs. 6 Test equipment 6.1 Acceleration measuring equipment The total mass of the accelerometer(s) shall be as low as possible and sh
27、all not in any case exceed 50 g, including the mounting but excluding the cables. The signal from the accelerometer(s) shall be processed by a low-pass filter having characteristics in accordance with Annex A. Care shall be taken when mounting the accelerometer so that the transfer function is flat
28、up to 300 Hz in both measuring directions. For general considerations concerning accelerometer mounting, see ISO 5348. The transfer function may be considered flat if an addition of mass to the accelerometer equal to that of the accelerometer does not have any significant influence on ax and ay. Thi
29、s additional mass should be placed between the accelerometer and its mounting if the mass is of metal, or around the accelerometer if the mass consists of materials such as clay or wax. The accuracy of the measuring equipment, excluding accelerometer mounting and filter, shall be 5 % of registered v
30、alue in the frequency range 0 Hz to 300 Hz. See ISO 16063-1 for calibration methods. Licensed CopyChinese University of Hong Kong, 13/06/2009 08:21, Uncontrolled Copy, (c) BSI BS ISO 13772:2009 ISO 13772:2009(E) ISO 2009 All rights reserved 3 6.2 Test rig The design principles of the test rig shall
31、be as shown in Figure 2. Both the length of the test-rig cord and the longitudinal and lateral positioning of the pivoting pulley for the cord shall be adjustable. The test rig rocker shall be made of rectangular hollow section steel, 80 mm 40 mm 4 mm, and shall have a mass of 6 700 g 300 g and a mo
32、ment of inertia of 0,45 kgm2 0,05 kgm2. The drop weight device shall have a drop mass of 15 000 g 20 g. It shall be possible to select drop heights in steps of 10 mm or less, at least between a drop height of 200 mm to 1 400 mm. The accuracy of the drop height shall be 2 mm. The spring in the drop w
33、eight device shall have a characteristic of 640 N/mm 20 N/mm for an increasing spring load. NOTE The specified spring rate can be achieved by seven leaf springs (45 mm 22,4 mm 1,75 mm), each having an adverse orientation in relation to the next. The spring defines the length and the characteristic o
34、f the impulse. The pulse of the simulated kickback will then be approximately 10 ms. 7 Preparation Prepare the chain-saw for testing as follows. a) Check that the chain-saw is in accordance with the product specification. If no guide bar length has been specified, choose one according to Table 1. b)
35、 Precondition the saw by actuating the non-manually actuated chain brake 10 times for example, by dropping the saw while holding the rear handle, so that the bar tip hits a rigid, wooden surface. c) Mount a saw chain suitable for the guide bar and cut softwood for the time it takes to use one tank f
36、ull 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 after the cutting sequence. Remove the chain with minimum disassembly and disturbance. The guide bar used in the cutting may also be, with minimum d
37、isturbance, replaced by a comparable, un-used, guide bar. d) Adjust the chain tension adjuster to its mid-position and move the guide bar to its uppermost position, in order to eliminate play, and fasten the guide bar on the saw. The saw chain shall not be installed and the tanks shall be empty. e)
38、Attach the accelerometer(s) for measurement of the horizontal and vertical accelerations, ax and ay, respectively. The centrelines of the two active orthogonal directions of the accelerometers shall intersect the guide bar tip radius centre point within 2 mm. The centre of gravity of the respective
39、accelerometers shall be within 10 mm from the guide bar tip radius centre point. The orientation of the accelerometer(s) shall be as shown in Figure 2. f) Mount the chain-saw on the test rig using cord at attachment points A and B (see Figure 2), so that the longitudinal centreline for the guide bar
40、 is inclined downwards at 30 2 and is parallel to the longitudinal plane of the test rig rocker. Attachment point A shall be on the grip area of the rear handle. For tree-service chain-saws, it can be necessary to move the attachment point further back, in order to be able to meet the requirement fo
41、r lift-off for a stated normal force. If that is the case, attach a backwards extension on the rear handle for attachment point A. This extension shall be as light as possible and shall in any case weigh no more than 100 g. Licensed CopyChinese University of Hong Kong, 13/06/2009 08:21, Uncontrolled
42、 Copy, (c) BSI BS ISO 13772:2009 ISO 13772:2009(E) 4 ISO 2009 All rights reserved Attachment point B shall be laterally adjusted so that the guide bar plane is vertical within 3. Attachment point B shall be placed high enough to ensure stable suspension of the chain-saw, i.e the straight line betwee
43、n points A and B shall pass above the centre of gravity of the chain-saw, and shall be along the longitudinal centre plane of the guide bar chosen, so that the guide bar tip will be lifted off the aluminium spacer when a normal force, Fn, of 2 N 0,4 N is applied (see Figure 2). g) Adjust the angular
44、 support so that the line perpendicular to the test-rig rocker longitudinal centreline passing through the contact point between the rocker spacer and the guide bar tip will pass through the guide bar tip radius centre point within 1 mm. The pulley shall be longitudinally positioned so that the guid
45、e bar tip will be pulled off the angular support when a tangential force Ft of 2 N 0,4 N is applied (see Figure 2). 8 Test procedure Actuate the non-manually actuated chain brake using the acceleration that occurs after release of the drop mass. Preferably, start at a drop height of 200 mm, then inc
46、rease the height in 100 mm steps to initiate actuation. After the first actuation, decrease the drop height again in steps of 20 mm to a point where the brake no longer actuates automatically. Raise the drop height by 10 mm and repeat the test five times under the same conditions. If the brake actua
47、tes all five times, the conditions established shall be used to measure accelerations ax and ay (see Figure 1). If the brake is not actuated five times, raise the drop height by 10 mm and repeat the test another five times. If necessary, repeat the procedure until a drop height is attained at which
48、the brake actuates five times. When the lowest drop height has been defined, measure and register five times the values of ax and ay under the same conditions, then calculate the average values of the accelerations. 9 Test report The test report shall include the following information: a) reference
49、to this International Standard (i.e. “ISO 13772:2009”); b) date and place of measurement; c) name of the operator; d) description of the chain-saw, consisting of manufacturer, type, model and serial number, type and length of guide bar, mass of the chain-saw as measured (with bar, without chain and with tanks empty), in kilograms, and release force of the chain brake (see ISO 6535), in newtons; e) description of the measuring equipment; f) description of the accelerometer mo