1、BS EN 15800:2008ICS 21.160NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDCylindrical helical springs made of round wire Quality specifications for cold coiled compression springsIncorporating corrigendum July 2009This British Standard was published under the au
2、thority of the Standards Policy and Strategy Committee on 31 January 2009 BSI 2009ISBN 978 0 580 67550 8Amendments/corrigenda issued since publicationBS EN 15800:2008National forewordThis British Standard is the UK implementation of EN 15800:2008. It partially supersedes BS 1726-1:2002, which is bei
3、ng revised to remove conflicting material. In the meantime, where conflict exists between the two standards the provisions of BS EN 15800:2008 take precedence.The UK participation in its preparation was entrusted by Technical Committee FME/9, Fasteners, to subcommittee FME/9/3, Product standards for
4、 fasteners.A list of organizations represented on this subcommittee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions Compliance with a British Standard cannot confer immunityof a contract. Users are responsible for its correct appl
5、ication.from legal obligations.Date Comments Addition of supersession details, and correction to committee details, in National foreword31 July 2009BS EN 15800:2008EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 15800December 2008ICS 21.160English VersionCylindrical helical springs made of round w
6、ire - Qualityspecifications for cold coiled compression springsRessorts cylindriques hlicodaux en fils ronds -Prescriptions de qualit des ressorts de compressionfaonns froidZylindrische Schraubenfedern aus runden Drhten -Gtevorschriften fr kaltgeformte DruckfedernThis European Standard was approved
7、by CEN on 18 October 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstanda
8、rds may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to t
9、he CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherl
10、ands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in an
11、y form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15800:2008: EBS EN 15800:2008EN 15800:2008 (E) 2 Contents Foreword 3 1 Scope 4 2 Normative references 4 3 Representation .5 4 Definitions, symbols, units and terms .6 5 Requirements .7 5.1 Coiling direction.7 5.2 Spring e
12、nds 7 5.3 Solid length Lc7 5.4 Material .8 5.5 Surface Treatment .8 6 Quality grades 8 6.1 Permissible variations of Quality Grades .8 6.2 Permissible variations of wire diameters d .8 6.3 Permissible variations ADfor coil diameter D of unloaded spring .8 6.4 Permissible variations AFfor spring forc
13、e F at given spring length L .9 6.5 Permissible variations AL0for length L0of unloaded spring .9 6.6 Permissible variations e1and e2of unloaded springs with ends closed and ground 12 6.7 Production margin 12 7 Testing . 13 7.1 Static load testing . 13 7.2 Characteristic 13 7.3 Test load for pressing
14、 to solid length (settling testing) . 13 Annex A (informative) Declaration and formulas 14 Annex B (informative) Example - Specification for a Cylindrical Helical Compression Spring . 15 Bibliography . 17 BS EN 15800:2008EN 15800:2008 (E) 3 Foreword This document (EN 15800:2008) has been prepared by
15、 Technical Committee CEN/TC 378 “Project Committee Springs“, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2009, and conflicting national standards
16、shall be withdrawn at the latest by June 2009. This European Standard has been prepared by the initiative of the Association of the European Spring Federation ESF and is based on the German Standard DIN 2095 “Helical springs made of round wire Specification for cold coiled compression springs“, whic
17、h is known and used in many European countries. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal
18、Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
19、Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 15800:2008EN 15800:2008 (E) 4 1 Scope This European Standard applies to cylindrical helical compression springs made of round spring wire. Cold coiled compression springs can
20、be made with wire up to about 16 mm diameter. (See also EN 13906-1). Cylindrical helical springs made of round wire from European Standard materials are subject to the limiting values in Table 1: Table 1 Characteristic Cold coiled compression springs Wire diameter 0,07 mm d 16 mm Mean coil diameter
21、0,63 mm D 200 mm Length of unloaded spring Lo 630 mm Number of active coils n 2 Spring index 4 w 20 A specification for the parameters of cold formed helical compression springs is given in Annex B. 2 Normative references The following referenced documents are indispensable for the application of th
22、is document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10270-1, Steel wire for mechanical springs Part 1: Patented cold drawn unalloyed spring steel wire EN 10270-2, Steel wire fo
23、r mechanical springs Part 2: Oil hardened and tempered spring steel wire EN 10270-3, Steel wire for mechanical springs Part 3: Stainless spring steel wire EN 12166, Copper and copper alloys Wire for general purposes BS EN 15800:2008EN 15800:2008 (E) 5 3 Representation Dimensions in millimetres Figur
24、e 1 Type 1 Spring ends closed and ground (with theoretical characteristic) Figure 2 Type 2 Spring ends closed BS EN 15800:2008EN 15800:2008 (E) 6 4 Definitions, symbols, units and terms Table 2 Symbols Units Terms aFN Value for determining variations of spring force and spring length (effect of geom
25、etry and dimensions) ADmm Permissible variation of coil diameter (De, Di, D) of unloaded spring AFN Permissible variation of spring force F at given spring length L AL0mm Permissible variation of length L0of unloaded spring d mm Nominal diameter of wire (or bar) dmaxmm Upper deviation of d Demm Outs
26、ide diameter of spring Ddmm Mandrel diameter (inner guide) Dhmm Sleeve diameter (outer guide) Dimm Inside diameter of spring D = 2ieDD +mm Mean diameter of spring e1mm Permissible variation of squareness of the unloaded ground spring e2mm Permissible variation in parallelism of the ground spring bea
27、ring surfaces, measured for DeF N Spring force F1, F2N Spring forces for the spring lengths L1, L2(at ambient temperature of 20 C) Fc thN Theoretical spring force at solid length Lc NOTE The actual spring force at the solid length is as a rule greater than the theoretical force. kf Factor for determ
28、ining variations of spring force and spring length (effect of active coils) L mm Spring length L0mm Nominal free length of spring L1mm Length at smallest test load F1L1, L2mm Spring lengths for the spring forces F1, F2Lcmm Solid length Lnmm Minimum permissible spring length (depending upon Sa) n Num
29、ber of active coils nt Total number of coils Q Coefficient of quality grade R = sFN/mm Spring rate s1, s2.mm Spring deflections, for the spring forces F1, F2.scmm Spring deflection for the solid length Lcshmm Deflection of spring (stroke) between two positions Samm Sum of minimum gaps between adjace
30、nt active coils at spring length Lnw = dD Spring index dL0= Slenderness ratio BS EN 15800:2008EN 15800:2008 (E) 7 5 Requirements 5.1 Coiling direction Compression springs are generally made with right-hand coiling, or with alternating right-hand and left-hand coiling for nested spring assemblies; in
31、 this case the outer spring is usually right-hand coiled. If left-hand coiling for springs is required, this shall be obvious from the note “left-hand coiled“ which shall appear in drawings or enquiries and order documents. See Annex B. 5.2 Spring ends The spring ends whereby the spring force is tra
32、nsmitted to the connecting components shall be designed so that the deflection of the spring is as nearly axial as possible in every position of the spring. This is generally achieved by reducing the pitch of one finishing coil at each end. To obtain adequate bearing surfaces perpendicular to the sp
33、ring axis, the wire ends are ground in accordance with Figure 1. If grinding of the spring ends is found to be inexpedient, the spring should be made according to Figure 2, that means without ground wire ends. In all cases the type of finish for the spring ends shall be stated in one of the contract
34、ual documents: descriptive, drawings or enquiries and order documents. See Annex B. If unground spring ends are acceptable for the particular use concerned, e.g. when the compression springs are made of wire having a diameter less than approximately 1 mm or with a spring index over 15, grinding of t
35、he wire ends should be omitted for economic reasons. See Annex B. When the compression springs are made of wire having a diameter under 0,3 mm the wire ends should not be ground. With regard to the simultaneous grinding of the spring ends of compression springs having a wire diameter from 0,3 mm up
36、to about 5 mm it should be noted that only springs which allow adequate contact pressure can be ground flat. Tests so far carried out indicate that this contact pressure shall amount to approximately DR 0,03 N/mm2(1) The spring ends should only be deburred if this is required for proper functioning,
37、 and shall be agreed between the spring manufacturer and the customer. This information shall be included in enquiries, drawings, and orders. See Annex B. 5.3 Solid length Lc(all coils are closed) For springs with ground ends according to Figure 1, the solid length is: maxtcdnL (2) For springs witho
38、ut ground ends according to Figure 2, the following applies: (3) where nt= n + 2 2 = Number of non-active coils ()max 51 d ,nL t c+BS EN 15800:2008EN 15800:2008 (E) 8 Springs have n 2 coils 5.4 Material The material selection shall be done in line with loading and function of the spring. The materia
39、ls covered by this standard are: a) Patented cold drawn unalloyed spring steel wire to EN 10270-1. b) Oil hardened and tempered spring steel wire to EN 10270-2. c) Stainless spring steel wire to EN 10270-3. d) Wire from copper and copper alloys to EN 12166. 5.5 Surface Treatment 5.5.1 Shot-peening S
40、prings may be shot peened, if agreed between manufacturer and customer. 5.5.2 Surface protection Either organic or inorganic coatings may be applied, if agreed between manufacturer and customer. 6 Quality grades 6.1 Permissible variations of Quality Grades For springs the quality grades 1, 2 and 3 a
41、re specified (for coefficients Q see Table 4). All the permissible variations listed below apply only to material given in EN 10270. For materials in EN 12166, permissible variations shall be agreed between manufacturer and customer. The choice between quality grades 1, 2 and 3 is governed by operat
42、ional requirements. The quality grade required and the permissible variations shall be expressly agreed or stated in the drawing. In the absence of information, quality grade 2 shall apply. In the interests of rationalized production quality grade 1 should be specified only when the particular use c
43、alls for it. For this purpose not all the quantities in Subclauses 6.2 to 6.6 necessarily belong to a single quality grade. If variations smaller then “1“ are required, agreements shall be made between manufacturer and customer. 6.2 Permissible variations of wire diameters d The permissible variatio
44、ns for wire diameter d are specified in the corresponding material standards see 5.4. 6.3 Permissible variations ADfor coil diameter D of unloaded spring For mean coil diameters D up to 200 mm, see Table 3. In drawings and in enquiries and order documents the inner diameter Di, or the external diame
45、ter Deand the mean coil diameter D shall be stated. The permissible variations specified for the mean coil diameter D apply to both the corresponding inner diameter Di and the external diameter De. In the case of springs working in a sleeve or on a mandrel, it is recommended that the smallest sleeve
46、 diameter or largest mandrel diameter also shall be stated. BS EN 15800:2008EN 15800:2008 (E) 9 Table 3 D mm Permissible variations ADmm Quality grade 1 with spring index w Quality grade 2 with spring index w Quality grade 3 with spring index w above to 4 to 8 above 8 to 14 above14 to 20 4 to 8 abov
47、e8 to 14 above14 to 20 4 to 8 Above8 to 14 above14 to 20 0,63 1 0,05 0,07 0,1 0,07 0,1 0,15 0,1 0,15 0,2 1 1,6 0,05 0,07 0,1 0,08 0,1 0,15 0,15 0,2 0,3 1,6 2,5 0,07 0,1 0,15 0,1 0,15 0,2 0,2 0,3 0,4 2,5 4 0,1 0,1 0,15 0,15 0,2 0,25 0,3 0,4 0,5 4 6,3 0,1 0,15 0,2 0,2 0,25 0,3 0,4 0,5 0,6 6,3 10 0,15
48、0,15 0,2 0,25 0,3 0,35 0,5 0,6 0,7 10 16 0,15 0,2 0,25 0,3 0,35 0,4 0,6 0,7 0,8 16 25 0,2 0,25 0,3 0,35 0,45 0,5 0,7 0,9 1,0 25 31,5 0,25 0,3 0,35 0,4 0,5 0,6 0,8 1,0 1,2 31,5 40 0,25 0,3 0,35 0,5 0,6 0,7 1,0 1,2 1,5 40 50 0,3 0,4 0,5 0,6 0,8 0,9 1,2 1,5 1,8 50 63 0,4 0,5 0,6 0,8 1,0 1,1 1,5 2,0 2,3 63 80 0,5 0,7 0,8 1,0 1,2 1,4 1,8 2,4 2,8 80 100 0,6 0,8 0,9 1,2 1,5 1,7 2,3 3,0 3,5 100 125 0,7 1,0 1,1 1,4 1,9 2,2 2,8 3,7 4,4 125 160 0,9 1,2 1,4 1,8 2,3 2,7 3,5 4,6 5,4 160 200 1,2 1,5 1,7 2,1 2,9 3,3 4,2
