EN 13906-3:2014

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 13906-3:2014SIST EN 13906-3:2014en,fr,de01-april-2014SIST EN 13906-3:2014SLOVENSKI
STANDARDSIST EN 13906-3:20091DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13906-3
January 2014 ICS 21.160 Supersedes EN 13906-3:2001English Version
Cylindrical helical springs made from round wire and bar - Calculation and design - Part 3: Torsion springs
Ressorts hélicoïdaux cylindriques fabriqués à partir de fils ronds et de barres - Calcul et conception - Partie 3: Ressorts de torsion
Zylindrische Schraubenfedern aus runden Drähten und Stäben - Berechnung und Konstruktion - Teil 3: DrehfedernThis European Standard was approved by CEN on 10 November 2013.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC 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 translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
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≥ 2 n
≥ 2 Spring index 4 ≤ w ≤ 20 4 ≤ w ≤ 12 a The user of this European Standard shall pay attention to the design of hot coiled springs, because there can be differences between the design and a real test. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10089, Hot-rolled steels for quenched and tempered springs - Technical delivery conditions EN 10270-1, Steel wire for mechanical springs - Part 1: Patented cold drawn unalloyed spring steel wire EN 10270-2, Steel wire for 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 EN ISO 26909:2010, Springs - Vocabulary (ISO 26909:2009) ISO 26910-1, Springs - Shot peening - Part 1: General procedures 3 Terms and definitions, symbols, units and abbreviated terms 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 26909:2010 and the following apply. 3.1.1 spring mechanical device designed to store energy when deflected and to return the equivalent amount of energy when released [SOURCE: EN ISO 26909:2010, 1.1] 3.1.2 torsion spring spring that offers resistance to a twisting moment around the longitudinal axis of the spring [SOURCE: EN ISO 26909:2010, 1.4] SIST EN 13906-3:2014

mm mean diameter of coil dD mm mandrel diameter eD mm outside diameter of the spring eDα mm outside coil diameter of the spring when deflected through and angle . in the direction of the coiling hD mm housing diameter iD mm inside diameter of the spring iαD mm inside coil diameter of the spring when deflected through and angle . in the direction of the coiling pD mm test mandrel diameter d mm nominal diameter of wire (or bar) maxd mm upper deviation of d Rd mm diameter of loading pins E N/mm2 (MPa) modulus of elasticity (or Young's modulus) F N spring force .
,21FF N spring forces for the torsional angles .
,21ααand related lever arms BA ,RRat ambient temperature of 20 °C nF N spring force for the maximum permissible angle nαand the lever arms BA ,RR KL mm body length of the unloaded spring for close-coiled springs (excluding ends) K0L mm body length of the unloaded spring for open-coiled springs (excluding ends) KLα mm body length of close-coiled spring deflected through an angle . (excluding ends) l mm developed length of active coils (excluding ends)
,BAll mm length of ends M N mm spring torque SIST EN 13906-3:2014

,21MM N mm spring torque for the angles .
,21ααand related lever arms BA ,RRat ambient temperature of 20 °C nM N mm spring torque for the maximum permissible angle, .n maxM N mm maximum spring torque, which occurs occasionally in practice, in test or during
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