1、BRITISH STANDARD BS 6911-1: 1988 ISO 9246:1988 Testing earth-moving machinery Part 1: Method for determination of volumetric rating of crawler and wheel tractor dozer blades ISO title: Earth-moving machinery Crawler and wheel tractor dozer blades Volumetric ratings UDC 624.132:621.868.238.62:621.86.
2、064.3:543.24:(083.71):620.1BS6911-1:1988 This British Standard, having been prepared under the directionof the Road EngineeringStandards Committee, was published underthe authority of theBoardofBSI and comes into effect on 30 December 1988 BSI 11-1999 The following BSI references relate to the work
3、on this standard: Committee reference RDB/21 Draft for comment 87/12999 DC ISBN 0 580 17030 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Road Engineering Standards Committee (RDB/-) to Technical Committee RDB/21, upon which the foll
4、owing bodies were represented: Associated Offices Technical Committee Construction Industry Training Board Construction Plant-hire Association Department of Trade and Industry Mechanical Engineering and Manufacturing Technology Division (Mmt) Federation of Civil Engineering Contractors Federation of
5、 Manufacturers of Construction Equipment and Cranes Health and Safety Executive Institution of Civil Engineers Institution of Highways and Transportation Ministry of Defence Amendments issued since publication Amd. No. Date of issue CommentsBS6911-1:1988 BSI 11-1999 i Contents Page Committees respon
6、sible Inside front cover National foreword ii 1 Scope and field of application 1 2 References 1 3 Definitions 1 4 Volume symbols and formulae 2 Figure 1 Blade included volume 2 Figure 2 Blade projected area 2 Figure 3 Straight, semi-U-, U-blade dimensions 3 Figure 4 Effective blade contour of semi-U
7、- and U-blades 3 Figure 5 Angling blade dimensions 4 Figure 6 Blade volume 4 Publications referred to Inside back coverBS6911-1:1988 ii BSI 11-1999 National foreword This Part of BS 6911 has been prepared under the direction of the Road Engineering Standards Committee. It is identical with ISO 9246:
8、1988 “Earth-moving machinery Crawler and wheel tractor dozer blades Volumetric ratings”, published by the International Organization for Standardization (ISO). ISO 9246 was produced as a result of international discussion in which the UKtook an active part. Terminology and conventions. The text of t
9、he 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 is drawn especially to the following. Wherever the words “International Standard
10、” appear, referring to this standard, they should be read as “Part of BS 6911”. 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 c
11、onfer immunity from legal obligations. Cross-references International Standard Corresponding British Standard BS6914 Terminology (including definitions of dimensions and symbols) for earth-moving machinery ISO6165:1987 Part 1:1988 Glossary of terms for basic types of earth-moving machinery (Identica
12、l) ISO6746-2:1987 Part3:1988 Glossary of terms for equipment (Identical) ISO6747:1982 BS 6296:1982 Glossary of terms for self-propelled crawler and wheel tractors and their equipment used for earth-moving (Identical) Summary of pages This document comprises a front cover, an inside front cover, page
13、si andii, pages1 to4, 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 cover.BS6911-1:1988 BSI 11-1999 1 1 Scope and field of application 1.1 This Int
14、ernational Standard specifies a procedure for calculating the volume of dozer blades. It is intended to be used for consistent comparisons of dozer blade capacities presented in commercial literature for tractors, as defined in ISO6165. It is not to be used for predicting productivity of tractor doz
15、ers in actual field conditions or that might be observed in any specific applications. Such determinations need to consider other parameters, such as efficiency of the blade, tractor power, tractive effort, soil properties, terrain, operator technique and duty cycle. 1.2 This International Standard
16、applies to all types of dozers that are mounted on all tractors defined in ISO6747. This includes straight, angling, semi-U-, and U-blade configurations. It is assumed that the blade face is flat and vertical; the blade included volume is not considered (see Figure 1). 2 References ISO 6165, Earth-m
17、oving machinery Basic typesVocabulary. ISO 6746-2, Earth-moving machinery Definitions of dimensions and symbols Part 2: Equipment. ISO 6747, Earth-moving machinery Tractors Terminology. 3 Definitions For the purposes of this International Standard, the definitions given in ISO 6746-2 and the followi
18、ng apply. 3.1 Straight blade dozers 3.1.1 blade projected area, A m blade area, in square metres, exclusive of the end bit extensions, projected on a vertical plane parallel to the middle part of the cutting edge of the blade (seeFigure 2). The blade is located in the mid-pitch position with the cut
19、ting edge on the ground reference plane (GRP) 3.1.2 blade width, W distance, in metres, from outside to outside of the blade, exclusive of the end bits (see Figure 3) 3.1.3 effective blade height, H vertical height, in metres, that with W width, produces a projected area equal to A m : i.e.H = A m /
20、W (seeFigure 3) 3.1.4 effective blade contour simplified representation of the blade face for calculating the blade capacity based on the vertical plane bounded by W and H (see Figure 3) 3.2 Semi-U- and U-blade dozers 3.2.1 blade projected area, A m (Identical to that for a straight blade see 3.1.1.
21、) 3.2.2 blade width, W (Identical to that for a straight blade see 3.1.2.) 3.2.3 effective blade height, H (Identical to that for a straight blade see 3.1.3.) 3.2.4 effective blade contour simplified representation of the blade face for calculating the blade capacity. It is established by intersecti
22、ng planes extending vertically from the cutting edge at the GRP, with the blade in the mid-pitch position. The frontal dimensions are W and H (see Figure 4) 3.2.5 wing angle, angle, in degrees, measured at the cutting edge on the GRP with the blade in the mid-pitch position. This angle describes the
23、 orientation of the intersecting planes that establish the effective blade contour (see Figure 4) 3.2.6 wing length, Z length, in metres, of the wing measured parallel to the blade width (see Figure 4) 3.3 Angling blade dozers in straight position 3.3.1 blade width, W blade width, in metres (see Fig
24、ure 5) 3.3.2 effective blade height, H vertical height, in metres, with the blade in the mid-pitch position (see Figure 5) 3.3.3 effective blade contour simplified representation of the blade face for calculating the blade capacity based on the vertical plane bounded by W and H (see Figure 5)BS6911-
25、1:1988 2 BSI 11-1999 4 Volume symbols and formulae 4.1 Symbols V s : Volume of straight, angling, semi-U- and U-blades using the simplified representation of the blade face for calculating the blade capacity shown in Figure 3 and Figure 4. V u : Volume of the contour of semi-U- and U-blades, taking
26、into account the wing angle and wing length (see Figure 6). V 1 : Capacity volume of straight and angling blades. V 2 : Capacity volume of semi-U- and U-blades. 4.2 Capacity volume formulae As shown in Figure 6, the following formulae will indicate blade capacities, in each case in cubic metres. 4.2
27、.1 Straight and angling blade capacity V 1= V s V s= 0,8 W (H) 2 4.2.2 Semi-U- and U-blade capacity V 2= V s+ V u V s= 0,8 W (H) 2 V u= Z H (W Z) tan Figure 1 Blade included volume Figure 2 Blade projected areaBS6911-1:1988 BSI 11-1999 3 Figure 3 Straight, semi-U-, U-blade dimensions Figure 4 Effect
28、ive blade contour of semi-U- and U-bladesBS6911-1:1988 4 BSI 11-1999 Figure 5 Angling blade dimensions Figure 6 Blade volumeBS6911-1:1988 BSI 11-1999 Publications referred to See national foreword.BS 6911-1: 1988 ISO 9246:1988 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution B
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