SIST EN 13906-3:2009
(Main)Cylindrical helical springs made from round wire and bar - Calculation and design - Part 3: Torsion springs
Cylindrical helical springs made from round wire and bar - Calculation and design - Part 3: Torsion springs
This standard specifies the calculation and design of cold coiled cylindrical helical torsion springs with a linear characteristic, made from round wire and bar of constant diameter with values according to table 1. NOTE Quality Standards for cold coiled torsion springs will be developed later.
Zylindrische Schraubenfedern aus runden Drähten und Stäben - Berechnung und Konstruktion - Teil 3: Drehfedern
Diese Norm gilt für die Berechnung und Konstruktion von kaltgeformten zylindrischen Drehfedern, auch Schenkelfedern genannt, mit linearer Kernlinie aus runden Drähten und Stäben mit konstantem Durchmesser mit Werten nach Tabelle 1. ANMERKUNG Gütenormen für kaltgeformte Drehfedern werden später erarbeitet.
Ressorts hélicoïdaux cylindriques fabriqués à partir de fils ronds et de barres - Calcul et conception - Partie 3: Ressorts de torsion
La présente norme spécifie le calcul et la conception des ressorts de torsion hélicoïdaux cylindriques enroulés à froid de caractéristiques linéaires fabriq qués à partir de fils ronds et de barres, de diamètre constant ayant les valeursdu tableau 1. NOTE Des normes sur la qualité des ressorts de torsion enroulés à froid seront developpées ultérieurement.
Vijačne valjaste vzmeti iz okrogle žice in palic - Izračun in načrtovanje - 3. del: Torzijske vzmeti
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Zylindrische Schraubenfedern aus runden Drähten und Stäben - Berechnung und Konstruktion - Teil 3: DrehfedernRessorts hélicoïdaux cylindriques fabriqués à partir de fils ronds et de barres - Calcul et conception - Partie 3: Ressorts de torsionCylindrical helical springs made from round wire and bar - Calculation and design - Part 3: Torsion springs21.160VzmetiSpringsICS:Ta slovenski standard je istoveten z:EN 13906-3:2001SIST EN 13906-3:2009en,fr,de01-julij-2009SIST EN 13906-3:2009SLOVENSKI
STANDARD
SIST EN 13906-3:2009
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13906-3December 2001ICS 21.160English versionCylindrical helical springs made from round wire and bar -Calculation and design - Part 3: Torsion springsRessorts hélicoïdaux cylindriques fabriqués à partir de filsronds et de barres - Calcul et conception - Partie 3:Ressorts de torsionZylindrische Schraubenfedern aus runden Drähten undStäben - Berechnung und Konstruktion - Teil 3: DrehfedernThis European Standard was approved by CEN on 5 January 2001.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 nationalstandards may be obtained on application to the 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 the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13906-3:2001 ESIST EN 13906-3:2009
EN 13906-3:2001 (E)2ContentsForeword.31Scope.42Normative references.43Terms and definitions, symbols, units and abbreviated terms.43.1Terms and definitions.43.2Symbols, units and abbreviated terms.54Theoretical torsion spring diagram.75Design Principles.105.1General.105.2Design of the ends.105.3Design of the spring body.116Types of loading.116.1Static and quasi-static loading.116.2Dynamic loading.117Stress correction factor q.128Material property values for the calculations of springs.139Design formulate.149.1Design assumptions.149.2Formulae.1410Permissible bending stress.1810.1Permissible bending stress under static or quasi-static loading.1810.2Permissible stress range under dynamic loading.19SIST EN 13906-3:2009
EN 13906-3:2001 (E)3ForewordThis European Standard has been prepared by CMC.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by June 2002, and conflicting national standards shall be withdrawn at the latest byJune 2002.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,Switzerland and the United Kingdom.This European Standard has been prepared by the initiative of the Association of the European Spring FederationESF and is based on the German Standard DIN 2088 - “Helical springs made of round wire and rod; cold coiledtorsional springs (leg springs); calculation and design” edition 1992-11, which is known and used in manyEuropean countries.SIST EN 13906-3:2009
EN 13906-3:2001 (E)41 ScopeThis standard specifies the calculation and design of cold coiled cylindrical helical torsion springs with a linearcharacteristic, made from round wire and bar of constant diameter with values according to Table 1.Table 1CharacteristicCold coiled torsion springWire or bar diameterd
17 mmCoil diameterD
340 mmLength of active coilsLK0
630 mmNumber of active coilsn
2Spring index4
w
20NOTEQuality Standards for cold coiled torsion springs will be developed later.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 10270-1:2001, Steel wire for mechanical springs – Part 1: Patented cold drawn unalloyed spring steel wire.EN 10270-2:2001, Steel wire for mechanical springs - Part 2: Oil hardened and tempered spring steel wire.EN 10270-3:2001, Steel wire for mechanical springs - Part 3: Stainless spring steel wire.EN 12166, Copper and copper alloys - Wire for general purposes.EN ISO 2162-1:1996, Technical product documentation - Springs - Part 1: Simplified representation(ISO 2162-1:1993).EN ISO 2162-3:1996, Technical product documentation - Springs - Part 3: Vocabulary(ISO 2162-3:1993).3 Terms and definitions, symbols, units and abbreviated terms3.1 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.3.1.1springmechanical device designed to store energy when deflected and to return the equivalent amount of energy whenreleased [2.1 from EN ISO 2162-3:1996]SIST EN 13906-3:2009
EN 13906-3:2001 (E)53.1.2torsion springspring that offers resistance to a twisting moment around the longitudinal axis of the spring [2.15 fromEN ISO 2162-3:1996]3.1.3helical torsion springtorsion spring that normally made from wire of circular cross-section wound around an axis with ends suitable fortransmitting a twisting moment [2.11 from EN ISO 2162-3:1996]NOTEIn the following text of this Standard the term spring is used with the meaning of helical torsion spring.3.2 Symbols, units and abbreviated termsTable 2 contains the symbols, units and abbreviated terms used in this standard.Table 2SymbolsUnitsTermsDAmmcoil diameter tolerance of the unloaded springammgap between active coils of the unloaded spring2ieDDDmmmean diameter of coildDmmmandrel diametereDmmoutside diameter of the springeDmmoutside coil diameter of the spring when deflected through and angle
in the directionof the coilinghDmmhousing diameteriDmminside diameter of the springiDmminside coil diameter of the spring when deflected through and angle
in the directionof the coilingpDmmtest mandrel diameterdmmnominal diameter of wire (or bar)maxdmmupper deviation of dRdmmdiameter of loading pinsEN/mm²modulus of elasticity (or Young's modulus)FNspring force.
,21FFNspring forces for the torsional angles .
,21and related lever arms .
,21RRatambient temperature of 20°CnFNspring force for the maximum permissible angle nand the lever arms nRKLmmbody length of the unloaded spring for close-coiled springs (excluding ends)KOLmmbody length of the unloaded spring for open-coiled springs (excluding ends)KLmmbody length of close-coiled spring deflected through an angle
(excluding ends)lmmdeveloped length of active coils (excluding ends)SIST EN 13906-3:2009
EN 13906-3:2001 (E)6Table 2 (continued)SymbolsUnitsTerms
,21llmmlength of endsMN mmspring torque.
,21MMN mmspring torque for the angles .
,21and related lever arms .
,21RRat ambienttemperature of 20°CnMN mmspring torque for the maximum permissible angle, nmaxMN mmmaximum spring torque, which occurs occasionally in practice, in test or during assembly ofthe springN-number of cycles up to rupturen-number of active coilsq-stress correction factor (depending on D/d)
, ,21RRRmmeffective lever arms of springMRN/mm²minimum value of the tensile strengthMRRNmm/Degangular spring rate (increase of spring torque per unit angular deflection)n .
, ,rrrr21mminner bending radiiwmm³sectional momentWN mmspring workdDw-spring indexz-decimal values of the number of active coils ntorsional angle.
,21Degtorsional angle corresponding to spring torque M1, M2 . to the spring forces
F1, F2 .nDegmaximum permissible torsional angleDegcorrected torsional angle
in the case of a long, unclamped tangential endDegangle de torsion
corrigé pour une branche longue, tangente, non serréehDegangular deflection of spring (stroke) between two positionsmaxDegmaximum torsional angle which occurs occasionally in practice, in test or by mounting of thespringDegincrease of torsional angle
due to deflection of a long, unclamped radial endDegincrease of torsional angle
due to deflection of a long, unclamped tangential endDegrelative end angle of unloaded spring0Degrelative end angle of loaded spring0Degrelative end fixing angle for unloaded springn .
,21Degrelative end fixing angle, corresponding to torsional angles n .
,21kg/dm³densityN/mm²uncorrected bending stress (without the influence of the wire curvature being taken intoaccount).
,21N/mm2uncorrected bending stress for the spring torque's M1, M2nN/mm²uncorrected bending stress for the spring torque MnSIST EN 13906-3:2009
EN 13906-3:2001 (E)7Table 2 (concluded)SymbolsUnitsTermsqN/mm²corrected bendin
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