1、August 2009 Translation by DIN-Sprachendienst.English price group 5No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、21.060.30!$sW“1809652www.din.deDDIN 6796Conical spring washers for bolted connectionsEnglish translation of DIN 6796:2009-08Spannscheiben fr SchraubenverbindungenEnglische bersetzung von DIN 6796:2009-08Rondelles cuvette emboutie pour assemblages visssTraduction anglaise de DIN 6796:2009-08Supersede
3、sDIN 6796:1987-10www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.09.11 6DIN 6796:2009-08 A comma is used as the decimal marker. Contents Page Foreword. 3 1 Scope . 4 2 Normative references . 4 3 Dimensions 5 4 Technical delivery co
4、nditions . 6 5 Designation . 6 2 DIN 6796:2009-08 Foreword This standard has been prepared by Working Committee NA 067-04-02 AA Scheiben und Ringe of the Normenausschuss Mechanische Verbindungselemente (Fasteners Standards Committee). Amendments This standard differs from DIN 6796:1987-10 as follows
5、: a) normative references have been updated; b) subject to agreement, conical spring washers may now also be made of stainless steel (see Clause 4). Previous editions DIN 6796: 1971-06, 1977-07, 1987-10 3 DIN 6796:2009-08 1 Scope This standard applies to conical spring washers intended for use with
6、bolted connections involving bolts of property classes 8.8 to 10.9 as specified in DIN EN ISO 898-1. The efficacy of such spring washers is greatly reduced if they are used together with fasteners of property classes less than 8.8, due to indentation. By maintaining a sufficiently high preloading in
7、 a bolted connection, conical spring washers are designed to prevent loosening of the assembly, which may be caused, for instance, by the effect of setting. The specification of residual spring forces given in DIN 267-26 has made it possible for the first time to assess the performance of spring was
8、hers. They do not effectively prevent loosening of the assembly under varying radial load and are thus only designed for use with short bolts predominantly subject to axial thrust. 2 Normative references The following referenced documents are indispensable for the application of this document. For d
9、ated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN 267-26, Technical delivery conditions for fasteners Part 26: Conical spring washers for bolt/nut assemblies DIN 4000-162, Tabular layout of p
10、roperties Part 162: Washers and rings DIN EN 10140, Cold rolled narrow steel strip Tolerances on dimensions and shape DIN EN 10029, Hot-rolled steel plates 3 mm thick or above Tolerances on dimensions and shape DIN EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel
11、 Part 1: Bolts, screws and studs with specified property classes Coarse thread and fine pitch thread 4 DIN 6796:2009-08 3 Dimensions See Figure 1 and Table 1. The tolerances specified relate to washers in their uncoated condition. Figure 1 Dimensions of conical spring washer (notation) 5 DIN 6796:20
12、09-08 6 Table 1 Dimensions Dimensions in millimetres d1d2sch Mass (7,85 kg/dm3) kg/1 000 units Nominal size H14 h14 max.amin.b For thread size 2d 2,2 5 0,4 0,6 0,5 0,05 2 2,5d 2,7 6 0,5 0,72 0,61 0,09 2,5 3d 3,2 7 0,6 0,85 0,72 0,14 3 3,5d 3,7 8 0,8 1,06 0,92 0,25 3,5 4 4,3 9 1 1,3 1,12 0,38 4 5 5,3
13、 11 1,2 1,55 1,35 0,69 5 6 6,4 14 1,5 2 1,7 1,43 6 7 7,4 17 1,75 2,3 2 2,53 7 8 8,4 18 2 2,6 2,24 3,13 8 10 10,5 23 2,5 3,2 2,8 6,45 10 12 13 29 3 3,95 3,43 12,4 12 14 15 35 3,5 4,65 4,04 21,6 14 16 17 39 4 5,25 4,58 30,4 16 18 19 42 4,5 5,8 5,08 38,9 18 20 21 45 5 6,4 5,6 48,8 20 22 23 49 5,5 7,05
14、6,15 63,5 22 24 25 56 6 7,75 6,77 92,9 24 27 28 60 6,5 8,35 7,3 113 27 30 31 70 7 9,2 8 170 30 aMaximum size at delivery. bMinimum size after test for permanent set as specified in DIN 267-26. cSee DIN EN 10140 for limit deviations for s 6 mm and DIN EN 10029 for s 6 mm. dTest values for the spring
15、force test as described in DIN 267-26 have not as yet been specified for this nominal size. 4 Technical delivery conditions DIN 267-26 shall apply with regard to the technical delivery conditions. Material: FSt = spring steel as in DIN 267-26. Austenitic stainless steels shall be subject to agreement. 5 Designation Designation of a conical spring washer of nominal size 8, made of spring steel (FSt): Conical spring washer DIN 6796 8 FSt The DIN 4000-162 tabular layout of product properties shall apply to conical spring washers covered in this standard.
