1、BRITISH STANDARD BS 6422:1983 ISO 7546:1983 Method for Volumetric rating of loader and front loading excavator buckets used for earth-moving ISO title: Earth-moving machinery Loader and front loading excavator buckets Volumetric ratings UDC 624.132:621.879.322.017.2:629.11.071.2BS6422:1983 This Brit
2、ish Standard, having been prepared under the directionof the Road Engineering Standards Committee, was published under the authority ofthe Board of BSI and comes intoeffect on 30November 1983 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference RDB/21 Dra
3、ft for comment 82/10073 DC ISBN 0 580 13488 1 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/21upon which the following bodies were represented: Associated Offices
4、Technical Committee Construction Industry Training Board Construction Plant-hire Association Department of Industry Federation of Civil Engineering Contractors Federation of Manufacturers of Construction Equipment and Cranes Health and Safety Executive Institution of Civil Engineers Institution of H
5、ighway Engineers Ministry of Defence National Coal Board Trades Union Congress Amendments issued since publication Amd. No. Date of issue CommentsBS6422:1983 BSI 09-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope and field of application 1 2 References 1 3
6、 Restrictions and limitations 1 4 Definitions and symbols 2 5 Volumetric ratings 3 6 Expression of volumetric ratings 7 Figure 1 Bucket 1 Figure 2 X and Y dimensions for irregular side sheet 2 Figure 3 Basic bucket 3 Figure 4 Extended straight cutting edge 4 Figure 5 Extended back sheet 5 Figure 6 I
7、rregular cutting edge 6 Figure 7 Extended cutting edge and extended back sheet 7 Table 7 Publications referred to Inside back coverBS6422:1983 ii BSI 09-1999 National foreword This British Standard has been prepared under the direction of the RoadEngineering Standards Committee and is identical with
8、 ISO7546:1983“Earth-moving machinery Loader and front loading excavator buckets Volumetric ratings” published by the International Organization for Standardization (ISO). ISO7456was produced as a result of international discussion in which the UK took an active part. Terminology and conventions. The
9、 text of the 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. The comma has been used as a dec
10、imal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. Cross-references. There are no corresponding British Standard
11、s for ISO7131and ISO7135, which are in course of preparation and to which reference is made in the text. As these standards are referred to for information only, the validity of this British Standard is not affected. A British Standard does not purport to include all the necessary provisions of a co
12、ntract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1to8, an inside back cov
13、er 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.BS6422:1983 BSI 09-1999 1 1 Scope and field of application 1.1 This International Standard specifies a procedure
14、for approximating the volume of typical materials contained in the bucket of front end loaders and excavators with front loading bucket. The volume ratings are based on the inside dimensions of the bucket and representative volumes on top of the bucket. 1.2 The method employs the technique of dividi
15、ng the complex shape of the material in the bucket into simple geometric forms to allow volume calculations of different bucket configurations. 1.3 The rating method is intended to provide a consistent means of comparing bucket capacities. It is not intended to define actual capacities that might be
16、 observed in any specific application. 2 References ISO 7131, Earth-moving machinery Loaders Terminology 1) . ISO 7135, Earth-moving machinery Excavators Terminology 1) . 3 Restrictions and limitations 3.1 The effect on volumes of local discontinuities such as bucket teeth, tooth adapters, and gusse
17、ts shall be ignored. 3.2 Grated or slotted back sheets attached to the bucket to protect the machine or operator from material that might spill over the back of the bucket shall not be included in the capacity calculations. Solid extended back sheets providing the same function may be included in th
18、e capacity calculations only if they are an integral part of the bucket. 1) At present at the stage of draft. Figure 1 BucketBS6422:1983 2 BSI 09-1999 3.3 Only buckets with an X/Y ratio greater than 12shall be considered by the rating method(s). (See Figure 2.) 4 Definitions and symbols 4.1 bucket c
19、omponent see Figure 1and ISO7131and ISO7135 4.2 strike plane horizontal plane across the width of the bucket from the cutting edge to the back sheet (See clause5 for different bucket shapes.) 4.3 struck volume V S volume which lies beneath the strike plane 4.4 top volume V T volume of material, a2 :
20、 1slope, which lies on top of the strike plane 4.5 rated bucket volume V R rated bucket capacity this capacity is calculated by adding the struck and top volumes: V R= V S+ V T . Figure 2 X and Y dimensions for irregular side sheetBS6422:1983 BSI 09-1999 3 5 Volumetric ratings 5.1 Basic bucket The b
21、ack sheet does not extend beyond a transverse line connecting the rear corners of the side sheets and the cutting edge does not extend beyond a transverse line connecting the front corners of the side sheets. 5.1.1 The strike plane passes through a line along the top of the back sheet at the rear an
22、d a line along the top of the cutting edge at the front as shown in Figure 3. 5.1.2 The volumetric capacity is calculated as shown in Figure 3. Figure 3 Basic bucketBS6422:1983 4 BSI 09-1999 5.2 Extended straight cutting edge The cutting edge is straight in the transverse direction and extends beyon
23、d a transverse line connecting the front corners of the side sheets and the back sheet does not extend beyond a transverse line connecting the rear corners of the side sheets. 5.2.1 The strike plane passes through a line along the cutting edge at the front and a line along the top of the back sheet
24、at the rear as shown in Figure 4. 5.2.2 The volumetric capacity is calculated as shown in Figure 4. 5.3 Extended back sheet The back sheet extends beyond a transverse line connecting the rear corners of the side sheets and the cutting edge does not extend beyond the transverse line connecting the fr
25、ont corners of the side sheets. 5.3.1 The strike plane passes through the line along the top of the extended back sheet at the rear and a line along the cutting edge at the front as shown in Figure 5. Figure 4 Extended straight cutting edgeBS6422:1983 BSI 09-1999 5 5.3.2 The volumetric capacity is c
26、alculated as shown in Figure 5. 5.4 Irregular cutting edge The cutting edge extends beyond a transverse line connecting the front corners of the side sheets and is not straight in the transverse direction. The back sheet does not extend beyond the transverse line connecting the rear corners of the s
27、ide sheets. 5.4.1 The strike plane passes through an imaginary transverse line at one third the distance of the protruding cutting edge at the front and a line along the top of the back sheet at the rear as shown in Figure 6. Figure 5 Extended back sheetBS6422:1983 6 BSI 09-1999 5.4.2 The volumetric
28、 capacity is calculated as shown in Figure 6. 5.5 Extended cutting edge and extended back sheet The cutting edge (straight or irregular) extends beyond a line joining the front corners of the side sheets and the back sheet extends beyond a line connecting the rear corners of the side sheets. 5.5.1 T
29、he strike plane rests on the top edge of the back sheet at the rear and on the top edge of a straight cutting edge or the h/3point (see 5.4.1) of an irregular cutting edge at the front as shown in Figure 7. Figure 6 Irregular cutting edgeBS6422:1983 BSI 09-1999 7 5.5.2 The volumetric capacity is cal
30、culated as shown in Figure 7. 6 Expression of volumetric ratings 6.1 The volumetric rating of a bucket is the summation of the struck volume plus the top volume. It shall be expressed in cubic metres and published as the rated ISO bucket capacity as shown in the Table. 6.2 If the determined capacity
31、, as shown in the Table, falls below a given rating interval by more than2%, the next lower interval shall be the rating. Table Figure 7 Extended cutting edge and extended back sheet Values in cubic metres Range of rated capacity Increments Up to and including 0,6 Over0,6 up to1,5 Over1,5 up to2,5 O
32、ver2,5 up to5,0 Over5,0 up to 10,0 Over 10,0 0,02 0,05 0,1 0,2 0,5 1,08 blankBS6422:1983 BSI 09-1999 Publications referred to See national foreword.BS 6422:1983 ISO 7546:1983 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for
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