ISO-2330-2002.pdf

INTERNATIONAL STANDARD ISO 2330 Third edition 2002-05-01 Reference number ISO 2330:2002(E) © ISO 2002 Fork-lift trucks Fork arms Technical characteristics and testing Chariots élévateurs à fourches Bras de fourche Caractéristiques techniques et essais ISO 2330:2002(E) ii© ISO 2002 All rights reserved PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details 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 relating to it is found, please inform the Central Secretariat at the address given below. © ISO 2002 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 photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's 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.ch Web www.iso.ch Printed in Switzerland ISO 2330:2002(E) © ISO 2002 All rights reserved iii 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 committees. 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 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 3. Draft International 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 International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 2330 was prepared by Technical Committee ISO/TC 110, Industrial trucks, Subcommittee SC 2, Safety of powered industrial trucks. This third edition cancels and replaces the second edition (ISO 2330:1995), of which it constitutes a minor revision. The Scope has been modified. INTERNATIONAL STANDARDISO 2330:2002(E) © ISO 2002 All rights reserved 1 Fork-lift trucks Fork arms Technical characteristics and testing 1Scope This International Standard specifies manufacturing, testing and marking requirements for solid-section fork arms, for quantity production and with all types of mounting. These include, but are not limited to, hook, shaft or pin, bolt-on and roller type fork arms. By agreement between the fork arm manufacturer and the purchaser, these requirements may also be applied to fork arms not intended for quantity manufacture. 2Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 148:1983, Steel Charpy impact test (V-notch) ISO 683-1:1987, Heat-treatable steels, alloy steels and free-cutting steels Part 1: Direct-hardening unalloyed and low-alloyed wrought steel in form of different black products ISO 2328:1993, Fork-lift trucks Hook-on type fork arms and fork arm carriages Mounting dimensions ISO 2331:1974, Fork lift trucks Hook-on type fork arms Vocabulary 3Terms and definitions For the purposes of this International Standard, the terms and definitions given in ISO 2331 and the following apply. 3.1 prototype fork arm fork arm intended for quantity production where any combination of the blade, shank cross-section, material specification, hook or fork heel design is new to production 4Manufacture The fork arms shall be manufactured from material of solid cross-section. 5Testing 5.1A prototype fork arm shall be subjected to, and meet the requirements of, the yield test in clause 6 and the impact test in clause 7. -,-,- ISO 2330:2002(E) 2© ISO 2002 All rights reserved Prototype fork arms each having a specified capacity not greater than and a load centre not greater than shall be subjected to, and meet the requirements of, the fatigue test in clause 8. 5.2The tests in clauses 6 and 7 may, by agreement between the fork arm manufacturer and the purchaser, be repeated periodically for quantity production fork arms. 6Yield test 6.1Test load 6.1.1Fork arms each of specified capacity up to and including The test load shall correspond to three times the specified capacity of the fork arm. 6.1.2Fork arms each of specified capacity greater than The test load shall correspond to the specified capacity , expressed in kilograms, of the fork arm multiplied by the safety factor , where is given as follows: where 6.2Procedure Restrain the fork arm in a manner identical to that used on the fork-lift truck. Fit the fork arm with a means of measuring any permanent deformation. Apply the appropriate yield test load twice at the distance from the front face of the fork arm shank (see Figure 1), gradually and without shock; maintain it for each time. For fork arms each of specified capacity below and a load centre of , shall be taken as the appropriate rated load centre distance as specified in Table 1 of ISO 2328:1993. For fork arms each of specified capacity of and above and a load centre of , shall be specified by the truck manufacturer. a Marking position (on either face). Figure 1 Marking position and test loads application position 4 000 kg 4 000 kg×600 mm 5 500 kg FTC 5 500 kg FTC RR R =30,08(Q 10) R ?2,5 Q = 2C 1 000 D 30 s5 500 kg 5 500 kg×600 mmD 5 500 kg 5 500 kg×600 mmD ISO 2330:2002(E) © ISO 2002 All rights reserved 3 6.3Requirement Datum readings shall be taken on the top surface of the fork blade tip after the first test and again after the second test. Comparison between these two readings shall indicate no permanent deflection. 7Impact test 7.1Sampling Specimens longitudinal to the grain shall be taken in relation to the fork arm section in accordance with the location of test pieces in bars and wire rods specified in ISO 683-1. These shall preferably be taken from an area between the top and bottom hooks, but it is also permissible to take specimens from a specially provided extension of the fork shank above the top hook or from a separate piece of semi-finished material of adequate size (i.e. length at least twice the width), which has the same cross-section, has been taken from the same material batch and has received the same heat treatment as the fork arm itself. 7.2Procedure Carry out the impact tests in accordance with ISO 148 using standardized V-notched samples, at a temperature of . 7.3Requirement The samples shall achieve an impact value of at least 27 J at . 8Fatigue test 8.1Test load magnitude, frequency and duration 8.1.1The dynamic test load shall be of constant amplitude and have a peak magnitude of 1,25 times the specified capacity . The minimum value for the dynamic test load shall not exceed 0,1 times the specified capacity . 8.1.2The test load frequency shall be maximum. The frequency shall be reduced if the temperature of the fork arm exceeds or if resonance symptoms occur. 8.1.3The duration of the test shall be not less than 106 test load cycles. 8.2Procedure Restrain the fork arm in a manner identical to that used on the fork-lift truck. Apply the dynamic test load at the distance from the front face of the fork arm shank where is as specified in 6.2 (see Figure 1). 8.3Requirement There shall be no cracks or permanent deformation in the fork arm on completion of the test. The crack detection procedure shall be as specified in clause 9. 20 C 20 C CC 10 Hz 50 C D ISO 2330:2002(E) 4© ISO 2002 All rights reserved 9Surface-crack detection The fork arm manufacturer shall thoroughly visually examine every fork arm in quantity production (or following a fatigue test) for cracks, and subject them to a non-destructive crack detection process with special attention being given to the heel and any welds and heat-affected zones at the top and bottom hooks, including their attachment to the shank. The fork arm shall be withdrawn if indications of cracking are detected. It is recommended that the non-destructive crack detection process be carried out by the magnetic particle inspection method. 10Marking 10.1At the position indicated in Figure 1 (on either face), each fork arm shall be marked permanently with the following: a)the specified fork arm capacity , in kilograms; b)the specified load centre distance , in millimetres; c)the fork arm manufacturers identification; d)the week or month and year of manufacture or agreed serial number. 10.2The truck manufacturer's identification and part number may be shown if requested. C D -,-,- ISO 2330:2002(E) ICS 53.060 Price based on 4 pages © ISO 2002 All rights reserved