1、BRITISH STANDARD BS4895:1981 Specification for Semi-tubular rivets for general purpose use UDC 621.884.6462.39BS4895:1981 This British Standard, having been prepared under the directionof the Mechanical Engineering Standards Committee, was published underthe authority ofthe Executive Board and comes
2、 intoeffect on 30November1981 BSI 07-1999 First published April1973 First revision November1981 The following BSI references relate to the work on this standard: Committee reference MEE/44 Draft for comment80/71911 DC ISBN 0 580 12247 6 Cooperating organizations The Mechanical Engineering Standards
3、Committee, under whose direction this British Standard was prepared, consists of representatives from the following: The organizations marked with an asterisk in the above list, together with the following, were directly represented on the Technical Committee entrusted with the preparation of this B
4、ritish Standard: Associated Offices Technical Committee Department of Trade (Marine Division) Association of Consulting Engineers Department of Transport Association of Hydraulic Equipment Electricity Supply Industry in England and Manufacturers Wales Association of Mining Electrical and Engineering
5、 Equipment Users Association Mechanical Engineers Federation of Manufacturers of Construction British Compressed Air Society Equipment and Cranes British Electrical and Allied Manufacturers Health and Safety Executive Association (BEAMA) Institution of Gas Engineers British Gas Corporation Instituti
6、on of Mechanical Engineers* British Gear Manufacturers Association Institution of Plant Engineers British Internal Combustion Engine Institution of Production Engineers Manufacturers Association Lloyds Register of Shipping British Pump Manufacturers Association London Transport Executive British Ste
7、el Corporation Machine Tool Industry Research Association British Steel Industry Ministry of Defence Cbmpe National Coal Board Chartered Institution of Building Services Oil Companies Materials Association Crown Agents for Oversea Governments and Process Plant Association Administrations Society of
8、Motor Manufacturers and Traders Department of Industry Limited (Mechanical Engineering) Telecommunication Engineering and Department of Industry Manufacturing Association (TEMA) (National Engineering Laboratory) Water-tube Boilermakers Association Department of the Environment (PSA) Aluminium Federa
9、tion Bureau Veritas Association of British Railway Carriage and Greater London Council Wagon Manufacturers Institution of Structural Engineers British Industrial Fasteners Federation Railway Industry Association of British Steel Industry (Wire Section) Great Britain Amendments issued since publicati
10、on Amd. No. Date of issue CommentsBS4895:1981 BSI 07-1999 i Contents Page Cooperating organizations Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Definitions 1 4 Workmanship 1 5 Radius under the head 1 6 Dimensions and tolerances 1 7 Tubes 1 8 Lengths 1 9 Heads 1 10 Materials 1 11 Design
11、ation for enquiry and order purposes 1 Appendix A Dimensioning terms and dimensional relationships 3 Appendix B Recommendations for hole, counterbore and clinch sizes 3 Figure 1 Details of rivet shanks and heads 2 Figure 2 Hole, counterbore and clinch details 4 Table 1 Dimensions 4 Table 2 Hole, cou
12、nterbore and clinch dimensions 4 Publications referred to Inside back coverBS4895:1981 ii BSI 07-1999 Foreword This revision of this British Standard has been prepared under the direction of the Mechanical Engineering Standards Committee and supersedes the first edition, published in April 1973, whi
13、ch is now withdrawn. The first edition introduced a complete new range of metric dimensioned rivets based on the shank diameter being controlled by the nominal diameter of the component hole. As this necessitated a complete change in tooling for manufacturers and users of automatic feed setting mach
14、ines, and differed from other male fastener dimensioning systems, it proved unacceptable in practice. This revision closely relates to the original practice on which Parts2 and3 of BS1855 were based when they were withdrawn in1973. In addition the shank diameters and the diameter range have been ali
15、gned with ISO1051:1969 “Rivet shank diameters (diameter range1 to36mm)” published by the International Organization for Standardization (ISO). Taper tube rivets were shown as an alternative to the parallel tube but were not dimensioned in the1973 edition. Because of the various hole shapes available
16、 taper tube rivets have been excluded from this revision. In compiling this standard, process capability studies have been made to ensure that the specified tolerances are practicable both for manufacturing purposes and use. Appendix B gives recommendations for the holes, counterbores and clinch siz
17、es. 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 confer immunity from legal obligations. Summary of pages This document compri
18、ses a front cover, an inside front cover, pagesi 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.BS4895:1981 BSI 07-1999 1 1
19、 Scope This British Standard specifies the materials and dimensions for semi-tubular oval head bevel countersunk head and countersunk head rivets for use in general purpose applications. The rivets are suitable for joining metallic and non-metallic materials, or a combination thereof. 2 References T
20、he titles of the standards publications referred to in this standard are listed on the inside back cover. 3 Definitions For the purposes of this British Standard, the following definitions apply. 3.1 nominal length of rivets (other than bevel countersunk and countersunk head). The length from the un
21、derside of the head to the end of the shank 3.2 nominal length of bevel countersunk and countersunk head rivets the distance from the top of the head to the end of the shank 3.3 plain condition condition after process to remove surplus lubricants 4 Workmanship The rivets shall be well furnished and
22、free from burrs and harmful defects. The heads and shank holes shall be well formed and the rivets shall conform with the details and dimensions given in Figure 1 and Table 1. 5 Radius under the head 5.1 In all styles of rivets, there shall be a small radius or chamfer at the junction of the head an
23、d shank. The minimum radius shall be as specified in Table 1. 5.2 The radius under the head of the rivet shall run smoothly into the face of the head and shank without any step or discontinuity. 6 Dimensions and tolerances The dimensions and tolerances shall be in accordance with Table 1. NOTEThe di
24、mensioning terms and the dimensional relationships are given in Appendix A. 7 Tubes For short rivets the tube depth, including point, shall be reduced to a nominal0.8mm shorter than the shank length. 8 Lengths The standard length range shall be from1 times to6 times “ds” the shank diameter. Standard
25、 lengths shall be3,4,5,6,7,8,9,10,11, 12, 14, 16, 18, 20mm and thereafter every2mm. NOTEIn rivets over2 times “ds” in length, there may be a “fallaway” in the centre of the shank, shown as “df” in Table 1 and Figure 1. 9 Heads The angle of head of styles “B” and “C” and that of the counter bore (see
26、 Figure 1 and Figure 2) shall be designed so that the head seats on its periphery before being set. NOTEThis is to ensure that a complete seating of the head in the countersunk recess is accomplished after the rivet is set. 10 Materials 10.1 The materials used in the manufacture of rivets shall be s
27、elected from the following. a) Steel (Fe), which shall be low carbon steel,0.12% carbon maximum,0.05% sulphur and phosphorus maximum. b) Brass (CuZn) and copper (Cu), which shall be of a suitable grade selected from BS2873. c) Aluminium (Al), which shall be99.5% aluminium in accordance with 1050A of
28、 BS1473. 10.2 Rivets shall be supplied in the “as cold forged” plain condition. NOTE to10.1 and10.2 If a purchaser desires rivets to be manufactured to any other material, specification or finish he should specify this in his enquiry or order. 11 Designation for enquiry and order purposes When desig
29、nating semi-tubular rivets for the purpose of an enquiry or order, the following information shall be given: a) the number of this British Standard, i.e.BS4895; b) head style; c) nominal diameter; d) rivet length; e) material.BS4895:1981 2 BSI 07-1999 For example, the designation for a semi-tubular
30、oval head rivet,4mm diameter 10mm long, of mild steel, is: BS4895/A4 10 Fe. The designation for a semi-tubular bevel countersunk head rivet,2mm diameter 4mm long, of aluminium, is: BS4895/B2 4 Al. Table 1 Dimensions Nominal diameter Dimension ds df dk c j ko r dy ly l max. min. min. max. min. max. m
31、ax. max. min. min. max. min. max. min. tolerance mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm 1.2 1.23 1.17 1.13 2.60 2.35 0.14 0.06 0.47 0.33 0.17 0.90 0.80 1.22 0.82 1.6 1.65 1.55 1.53 3.40 3.10 0.19 0.08 0.61 0.47 0.2 1.19 1.09 1.46 1.06 0.20 2 2.05 1.95 1.93 4.20 3.72 0.24 0.10 0.75 0.61 0.23 1.
32、48 1.38 1.70 1.30 2.5 2.55 2.45 2.43 5.00 4.52 0.30 0.13 0.93 0.79 0.26 1.88 1.74 2.20 1.60 3 3.05 2.95 2.93 6.00 5.52 0.36 0.15 1.10 0.96 0.30 2.24 2.10 2.50 1.90 0.30 4 4.06 3.94 3.90 8.00 7.42 0.48 0.20 1.45 1.20 0.38 2.96 2.82 3.10 2.50 5 5.06 4.94 4.90 9.70 9.12 0.60 0.25 1.80 1.55 0.45 3.72 3.
33、54 3.85 3.10 6 6.06 5.94 5.90 11.70 11.00 0.72 0.30 2.15 1.90 0.53 4.44 4.26 4.45 3.70 0.38 8 8.075 7.925 7.88 15.70 15.00 0.96 0.40 2.85 2.60 0.68 6.00 5.70 5.65 4.90 NOTEFor dimensioning terms and definitions see Appendix A. Figure 1 Details of rivet shanks and headsBS4895:1981 BSI 07-1999 3 Appen
34、dix A Dimensioning terms and dimensional relationships A.1 Dimensioning terms c is the height of land, maximum df is the fallaway (minimum shank diameter) dg is the clinch counterbore diameter, minimum di is the clinch diameter, nominal dj is the head counterbore diameter, minimum dk is the head dia
35、meter dp is the workpiece hole diameter (relatively strong materials) dq is the workpiece hole diameter (relatively weak materials) ds is the shank diameter dy is the parallel tube diameter j is the bevel height, maximum ki is the clinch height, nominal ko is the overall head height (style “A” head)
36、 li is the clinch allowance, nominal l is the length of rivet ly is the tube depth parallel r is the under head radius, minimum A.2 Dimensional relationships Appendix B Recommendations for hole, counterbore and clinch sizes The hole, counterbore and clinch dimensions, shown in Figure 2 and Table 2,
37、are for guidance only and it is recommended that for production, trial riveting of components should be arranged to ensure correct and safe clinching and operation of the rivet and the components. Clinch length and rivet set end condition will vary with the material and method used for setting. Wher
38、e weak or fragile materials are riveted to stronger ones the rivet head should hold the weak or fragile material. If this is not possible it is advisable to place a washer between the fragile material and the rivet clinch. c max. = 0.12 ds df = ds e11 (see BS4500) dg = 2 ds+1.6 di = 1.5ds dj = dk ma
39、x.+1 dk max. = 2 ds+0.2 where ds u 2 = 2 ds where ds 2 and u 4 = 2 ds 0.3where ds 4 dp = ds +0.1 where ds u 2.0 = ds +0.2 where ds 2 and u 4.5 = ds +0.3 where ds 4.5 dq = ds +0.15 where ds u 2 = ds +0.30 where ds 2 and u 4.5 = ds +0.40 where ds 4.5 dy min. = 0.72 ds0.06 j max. = 0.05 ds ko max. = 0.
40、35 ds +0.05 li = 0.7 ds ly min. = 0.6 ds+0.10 r = 0.075 ds+0.075BS4895:1981 4 BSI 07-1999 Table 2 Hole, counterbore and clinch dimensions Nominal diameter Dimension dp Drill size dq di ki dg dj li max. min. nominal nominal nominal nominal min. min. nominal 1.2 mm 1.34 mm 1.28 mm 1.30 mm 1.35 mm 1.80
41、 mm 0.20 mm 4.00 mm 3.60 mm 0.80 1.6 1.74 1.68 1.70 1.75 2.40 0.25 4.80 4.40 1.10 2 2.14 2.08 2.10 2.15 3.00 0.40 5.60 5.20 1.40 2.5 2.74 2.68 2.70 2.80 3.80 0.45 6.60 6.00 1.80 3 3.25 3.17 3.20 3.30 4.50 0.50 7.60 7.00 2.10 4 4.25 4.17 4.20 4.30 6.00 0.70 9.60 9.00 2.80 5 5.35 5.27 5.30 5.40 7.50 0
42、.85 11.60 10.70 3.50 6 6.36 6.27 6.30 6.40 9.00 1.00 13.60 12.70 4.20 8 8.36 8.27 8.30 8.40 12.00 1.30 17.60 16.70 5.60 Figure 2 Hole, counterbore and clinch detailsBS4895:1981 BSI 07-1999 Publications referred to BS1473, Wrought aluminium and aluminium alloys for general engineering purposesrivet,
43、boltandscrew stock. BS2873, Copper and copper alloys. Wire. BS4500, ISO limits and fits. ISO1051, Rivet shank diameters (diameter range1 to36mm) 1) . 1) Referred to in the foreword only.BS4895:1981 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent nationa
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