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1、BRITISH STANDARD BS ISO 5718:2002 Harvesting equipment Blades for agricultural rotary mowers Requirements ICS 65.060.50 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 03:29:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 5718:2002 This British Standard, having been prepared under the
2、direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 17 October 2002 BSI 17 October 2002 ISBN 0 580 40594 X National foreword This British Standard reproduces verbatim ISO 5718:2002 and implements it as
3、 the UK national standard. The UK participation in its preparation was entrusted to Technical Committee AGE/23, Equipment for harvesting and conservation, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-referen
4、ces The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Onl
5、ine. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsi
6、ble international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover,
7、 the ISO title page, pages ii and iii, a blank page, pages 1 to 4, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, n
8、a, Mon Nov 27 03:29:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 5718:2002(E) INTERNATIONAL STANDARD ISO 5718 First edition 2002-07-15 Harvesting equipment Blades for agricultural rotary mowers Requirements Matriel de rcolte Lames pour faucheuses rotatives agricoles Prescriptio
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14、wiso.ch ii BS ISO 5718:2002 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 03:29:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prepari
15、ng 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 lia
16、ison 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. The main task of
17、technical committees is to prepare International Standards. 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
18、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. ISO 5718 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and f
19、orestry, Subcommittee SC 7, Equipment for harvesting and conservation. This first edition of ISO 5718 cancels and replaces ISO 5718-1:1989 and ISO 5718-2:1991, which have been technically revised. BS ISO 5718:2002 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 03:29:34 GMT+00:00 2006, Uncont
20、rolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 03:29:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTENRATIONAL TSANDADR IS:8175 O2002(E) 1 Harvesting equipment Blades for agricultural rotary mowers Requirements 1 Scope This International Standard specifies the material
21、 characteristics of, and marking requirements for, blades on agricultural rotary mowers used for harvesting. In addition, because the blades on agricultural rotary mowers are exposed to considerable centrifugal forces and impact with foreign objects, it includes a simple bend test for checking the b
22、rittleness of the material. It does not specify dimensions. 2 Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of
23、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 edition of the normative document indicated below. For undated references, the latest edition of the normative document refer
24、red to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 6508 (all parts), Metallic materials Rockwell hardness test 3 Terms and definitions For the purposes of this International Standard, the following terms and definitions apply. 3.1 agricultural r
25、otary mower mower used in agriculture in which one or more functional components cut or shear by impact and rotate about a vertical axis 3.2 drum mower agricultural rotary mower in which the blades are fastened to the lower part of a drum-shaped body, where the drums are driven from above See Figure
26、 1. BS ISO 5718:2002 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 03:29:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 Figure 1 Drum mower 3.3 disc mower agricultural rotary mower in which blades are fastened to a discoid body, where the discs are driven from below See Figure 2. Figure 2
27、Disc mower 3.4 blades pivoting element, which can be flat, twisted, wrenched or deformed, performing the cutting of the crop 3.5 bending zone area in which the blade can be deformed by the bend test BS ISO 5718:2002 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 03:29:34 GMT+00:00 2006, Unco
28、ntrolled Copy, (c) BSI 3 4 Material characteristics 4.1 Requirements Blades shall be made of a steel chosen by the manufacturer. The values of Rockwell hardness shall be at least 45 HRC, in accordance with ISO 6508. The degree of brittleness shall be in accordance with 4.2. 4.2 Bend test (see Figure
29、 3) Bend a blade progressively, within the bending zone, to an inside radius of 16 mm and through an angle, , at a minimum ram test speed of 20 mm/s. The width of the ram and of the bearings shall be greater than or equal to the width, s, of the blade under test. See Table 1 for the angle correspond
30、ing to a blade width range. Table 1 s mm degrees 3,5 75 W 3,5 to 4,5 45 W 4,5 30 Blades that are not flat shall be tested in the most unfavourable position. The middle of the bending zone shall correspond to the middle of the total length of the blade. The distance, l, between the bearings shall be
31、calculated as l = (32 + 3 s) s/2 and shall be constant during the bend test. The outside radius of each bearing shall be 10 mm; the bearings shall be mounted rotatable bearings. A spring-back rate is not to be taken into account. After the bend test, the blade shall not present any visible cracks. B
32、S ISO 5718:2002 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 03:29:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 Key 1 Ram 2 Blade 3 Bearing 4 Bending zone NOTE 1 The rollers illustrated are an example of a type of bearing that can be used. NOTE 2 The flat blade illustrated is an example
33、 of the types of blade covered by this International Standard. Figure 3 Bend test set-up 5 Marking For identification purposes, the following shall be marked on each blade: name of manufacturer or trademark; date or lot number, or production run number, or other production marking; if necessary, the
34、 direction of movement. Additional markings such as the dimensions of the blade are allowed. These indications, as appropriate, shall be labelled on the outside of the packing in addition to the identification of conformance with this International Standard (i.e. “ISO 5718”). BS ISO 5718:2002 Licens
35、ed Copy: sheffieldun sheffieldun, na, Mon Nov 27 03:29:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 03:29:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 5718:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution
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