{"id":2259,"date":"2021-01-04T15:45:41","date_gmt":"2021-01-04T15:45:41","guid":{"rendered":"https:\/\/rdosprings.com\/?p=2259"},"modified":"2021-01-22T09:10:39","modified_gmt":"2021-01-22T09:10:39","slug":"comprendre-les-ressorts-de-traction","status":"publish","type":"post","link":"https:\/\/rdosprings.com\/fr\/comprendre-les-ressorts-de-traction\/","title":{"rendered":"COMPRENDRE LES RESSORTS DE TRACTION"},"content":{"rendered":"<h1 style=\"text-align: center;\"><span style=\"color: #0000ff;\"><strong>COMPRENDRE LES RESSORTS DE TRACTION<\/strong><\/span><\/h1>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-2060 aligncenter\" src=\"https:\/\/rdosprings.com\/wp-content\/uploads\/revslider\/valeurs\/torsion.png\" alt=\"\" width=\"205\" height=\"149\" \/><\/p>\n<p>Le <strong>CETIM <\/strong>(Centre Technique des Industries M\u00e9caniques) a publi\u00e9 en d\u00e9cembre 2002, un \u00ab\u00a0guide \u00e0 l\u2019usage des concepteurs, des utilisateurs et des fabricants\u00a0\u00bb, qui concerne <strong>LES RESSORTS DE TRACTION.<\/strong><\/p>\n<p>Ce document tr\u00e8s complet de 60 pages explique toutes les contraintes qui sont soumises aux fabricants pour la r\u00e9alisation de pi\u00e8ces. <strong>RDO springs a particip\u00e9 activement \u00e0 la d\u00e9finition<\/strong> de ce document puisqu\u2019un de nos collaborateurs \u00e9tait membre de la commission de travail.<\/p>\n<p>Nous allons vous indiquer ici les principaux chapitres de ce document afin de mieux cerner l\u2019essence de ce document.<\/p>\n<table border=\"0\">\n<tbody>\n<tr>\n<td><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/06\/ressort-traction-fabrication-300x184.jpg\" alt=\"\" width=\"240\" height=\"147\" \/><\/td>\n<td><\/td>\n<td><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/06\/traction3-300x206.png\" alt=\"\" width=\"229\" height=\"147\" \/><\/td>\n<td><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/05\/ressorts-composes-300x201.jpg\" alt=\"\" width=\"222\" height=\"147\" \/><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>L\u2019introduction rappelle la distinction entre les diff\u00e9rents types de ressorts\u00a0:<\/strong><\/p>\n<ul>\n<li><strong>\u00c0 chaud\u00a0:<\/strong> le ressort de traction en acier est \u00ab\u00a0forg\u00e9\u00a0\u00bb puis mis en forme. Il subit une trempe et un revenu pour garder les caract\u00e9ristiques<\/li>\n<li><strong>\u00c0 froid\u00a0:<\/strong> le ressort de traction en acier est form\u00e9 \u00e0 froid, et ne subit pas de traitement apr\u00e8s sa fabrication autre qu\u2019une stabilisation dans des fours pour pr\u00e9server ses caract\u00e9ristiques techniques<\/li>\n<li><\/li>\n<\/ul>\n<h3 style=\"text-align: center;\"><strong><u>RDO Springs fabrique des ressorts de traction enroul\u00e9s \u00e0 froid.<\/u><\/strong><\/h3>\n<p>&nbsp;<\/p>\n<hr \/>\n<p>Page 11, sont d\u00e9finis toutes les d\u00e9finitions des termes techniques utilis\u00e9s dans le document.<\/p>\n<p>La norme qui r\u00e9git la fabrication des <strong><u>ressorts de traction<\/u><\/strong> est\u00a0la :<br \/>\n<a href=\"https:\/\/www.boutique.afnor.org\/recherche\/resultats\/mot\/13906-2\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/07\/roue-rdo-visuel.png\" alt=\"\" width=\"94\" height=\"94\" \/>NF EN 13906 -2 : Norme Europ\u00e9enne \u00ab Ressorts h\u00e9lico\u00efdaux cylindriques fabriqu\u00e9s \u00e0 partir de fils ronds et de barres &#8211; Calcul et conception &#8211; Partie 2 : ressorts de traction \u00bb (septembre 2013).<\/a><\/p>\n<hr \/>\n<p>La seconde partie, (page 14 \u00e0 24), explique l\u2019ensemble des caract\u00e9ristiques des <strong>RESSORTS DE TRACTION<\/strong> d\u00e9finies dans la norme NF EN 13906. Chaque chapitre de la liste ci-dessous est comment\u00e9 et des tableaux associ\u00e9s vous permettront de mieux appr\u00e9hender les exigences.<\/p>\n<ul>\n<li>Domaine d\u2019application des ressorts de traction concern\u00e9s par les \u00e9l\u00e9ments techniques expliqu\u00e9s dans le document<\/li>\n<li>El\u00e9ments de calcul et plus particuli\u00e8rement le type de<strong> boucles<\/strong> (appel\u00e9s aussi \u0153illets, ou anneaux) mais aussi si l\u2019extr\u00e9mit\u00e9 est en forme de <strong>crochets<\/strong>, ou si l\u2019extr\u00e9mit\u00e9 d\u2019accrochage est r\u00e9alis\u00e9e avec <strong>des pi\u00e8ces rapport\u00e9es<\/strong>)<\/li>\n<li>De nombreux tableaux de cas sont ensuite pr\u00e9sent\u00e9s et vous aideront \u00e0 d\u00e9finir les c\u00f4tes les plus usuelles en pr\u00e9sentant les formules de calcul (encombrement, diam\u00e8tre moyen, rapport d\u2019enroulement, tensions, raideur, taux de contrainte charges maximales, nombres de spires \u2026).<\/li>\n<li><\/li>\n<\/ul>\n<p>A partir de la page 26, est trait\u00e9 une partie technique li\u00e9e au type de boucle. En effet, il est<span style=\"color: #ff0000;\"> <strong>indispensable de conna\u00eetre les contraintes de flexion et de torsion des boucles<\/strong><\/span> qui seront soumises directement aux efforts.<\/p>\n<p>Pour aider \u00e0 la conception du ressort de traction, un ensemble de r\u00e8gles sont \u00e9nonc\u00e9es afin de \u00ab\u00a0construire\u00a0\u00bb le ressort de traction avec les c\u00f4tes les plus indispensables. Ces c\u00f4tes sont suivies de tol\u00e9rances sur le <span style=\"color: #ff0000;\"><strong>rapport d\u2019enroulement<\/strong><\/span> souhait\u00e9 (issues de la norme allemande DIN 2097), selon les exigences de capabilit\u00e9s (% de pi\u00e8ces conformes dans un lot).<\/p>\n<p><strong><u><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1245 aligncenter\" src=\"https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/06\/ressort-traction-plan-300x237.jpg\" alt=\"\" width=\"300\" height=\"237\" srcset=\"https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/06\/ressort-traction-plan-300x237.jpg 300w, https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/06\/ressort-traction-plan.jpg 570w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/u><\/strong><\/p>\n<p><strong><u>Rappel\u00a0: <\/u><\/strong><\/p>\n<p>Rapport d\u2019enroulement = D\/d, soit diam\u00e8tre moyen des spires \/ diam\u00e8tre nominal de fil<\/p>\n<p>D\u2019autres tol\u00e9rances sont exprim\u00e9es sur\u00a0: le diam\u00e8tre de fil \u00e0 utiliser, la longueur libre (\u00e0 vide), la longueur sous charge, les positions des boucles. D\u2019autres suggestions sont exprim\u00e9es \u00e9galement pour d\u00e9finir le contexte et les conditions d\u2019utilisation du produit.<\/p>\n<p>L\u2019ensemble de ces \u00e9l\u00e9ments va aider \u00e0 remplir les donn\u00e9es techniques qui serviront \u00e0 \u00e9tablir le cahier des charges pour le fabricant.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2260 aligncenter\" src=\"https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/12\/0581_001-300x228.jpg\" alt=\"\" width=\"580\" height=\"441\" srcset=\"https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/12\/0581_001-300x228.jpg 300w, https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/12\/0581_001-1024x779.jpg 1024w, https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/12\/0581_001-768x584.jpg 768w, https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/12\/0581_001-1536x1168.jpg 1536w, https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/12\/0581_001.jpg 1619w\" sizes=\"auto, (max-width: 580px) 100vw, 580px\" \/><\/p>\n<p><strong><u>Nb\u00a0: <\/u><\/strong>Nous indiquons \u00e0 de nombreuses reprises sur notre site internet que tous les types de ressorts ne sont pas \u00ab\u00a0standards\u00a0\u00bb. Chaque utilisateur a ses propres caract\u00e9ristiques et ses besoins. Il faut les exprimer et en d\u00e9duire des c\u00f4tes et tol\u00e9rances admissibles.<\/p>\n<p>RDO est \u00e9quip\u00e9 et ma\u00eetrise des logiciels tr\u00e8s techniques qui lui permet de d\u00e9finir vos plans selon vos exigences.<\/p>\n<p>&nbsp;<\/p>\n<p><u>A partir de la page 33, sont exprim\u00e9s des lignes directrices pour\u00a0: <\/u><\/p>\n<ul>\n<li>Le choix de la mati\u00e8re qui influencera fortement les r\u00e9sistances voulues.<\/li>\n<li>Les conditions d\u2019assemblage\u00a0: comment sera mont\u00e9 le produit par le client\u00a0?<\/li>\n<li>Des informations sur l\u2019aspect du produit<\/li>\n<li>La mani\u00e8re dont sera contr\u00f4l\u00e9 le produit tout au long de son processus de production, et quelles sont les c\u00f4tes sp\u00e9cifiques \u00e0 contr\u00f4ler. De m\u00eame, une rigueur de contr\u00f4le et des moyens adapt\u00e9s sont pr\u00e9conis\u00e9s (le fabricant doit respecter les normes ISO 9000).<\/li>\n<li>Le processus de fabrication\u00a0: pr\u00e9paration de la mati\u00e8re, fa\u00e7onnage des extr\u00e9mit\u00e9s, traitement thermique et traitement de surface pour le finaliser.<\/li>\n<li>Sources de d\u00e9faut connus<\/li>\n<li>Manutention et conditionnement des ressorts<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1203 aligncenter\" src=\"https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/06\/traction4-300x206.png\" alt=\"\" width=\"143\" height=\"98\" srcset=\"https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/06\/traction4-300x206.png 300w, https:\/\/rdosprings.com\/wp-content\/uploads\/2020\/06\/traction4.png 387w\" sizes=\"auto, (max-width: 143px) 100vw, 143px\" \/><\/p>\n<p>RDO SPRINGS respecte toutes les pr\u00e9conisations de ce pr\u00e9sent guide et le prouve via\u00a0:<\/p>\n<ul>\n<li>Ses certifications <a href=\"https:\/\/rdosprings.com\/fr\/certifications-2\/\"><strong>ISO 9001 et EN 9100<\/strong> <\/a>reconduites<\/li>\n<li>Ses fr\u00e9quents audits clients des secteurs tr\u00e8s exigeants que sont les secteurs m\u00e9dicaux (pharma, m\u00e9dical, cosm\u00e9tique), <a href=\"https:\/\/rdosprings.com\/fr\/secteurs-dactivite\/\">a\u00e9ronautique &amp; spatial<\/a><\/li>\n<li>Sa participation active \u00e0 l\u2018\u00e9cole de formation des r\u00e9gleurs (AFPIDEM &#8211; <a href=\"https:\/\/www.fimmef.fr\/lafpidem-le-seul-outil-de-formation-de-votre-profession-mis-en-place-par-les-industriels-du-fimmef\/\">https:\/\/www.fimmef.fr\/lafpidem-le-seul-outil-de-formation-de-votre-profession-mis-en-place-par-les-industriels-du-fimmef\/<\/a> )<\/li>\n<li>Sa participation active \u00e0 l\u2019UNM\u00a0: Union de Normalisation de la M\u00e9canique (<a href=\"https:\/\/www.unm.fr\/fr\/accueil\">https:\/\/www.unm.fr\/fr\/accueil<\/a> )<\/li>\n<li>Sa participation active au syndicat des ressortiers fran\u00e7ais (FIM ressorts \u2013 F\u00e9d\u00e9ration des Industries M\u00e9caniques &#8211; <a href=\"https:\/\/www.fim.net\/fr\/ancien-site\/accueil\/la-fim\/organismes-intersyndicaux-specialises\/fim-sous-traitance\">https:\/\/www.fim.net\/fr\/ancien-site\/accueil\/la-fim\/organismes-intersyndicaux-specialises\/fim-sous-traitance<\/a><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>Nous vous conseillons vivement de consulter ce document car il rappelle de nombreuses r\u00e8gles et informations pour le concepteur, le fabricant et l\u2019utilisateur. Vous pourrez l\u2019obtenir gratuitement aupr\u00e8s du <a href=\"https:\/\/www.cetim.fr\">CETIM<\/a> (si vous \u00eates affili\u00e9 \u00e0 cet organisme) ou directement aupr\u00e8s de RDO SPRINGS.<\/p>\n<p>&nbsp;<\/p>\n<p>Vous pouvez commander les normes sur le site de l\u2019AFNOR (Agence fran\u00e7aise de normalisation)\u00a0: <a href=\"https:\/\/www.boutique.afnor.org\/recherche\/resultats\/mot\/13906-2\"><u>https:\/\/www.boutique.afnor.org\/recherche\/resultats\/mot\/13906-2<\/u><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le CETIM (Centre Technique des Industries M\u00e9caniques) a publi\u00e9 en d\u00e9cembre 2002, un \u00ab\u00a0guide \u00e0 l\u2019usage des concepteurs, des utilisateurs et des fabricants\u00a0\u00bb, qui concerne LES RESSORTS DE TRACTION.<\/p>\n","protected":false},"author":5,"featured_media":2060,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[42],"tags":[],"class_list":["post-2259","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites-de-la-profession"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>COMPRENDRE LES RESSORTS DE TRACTION - RDO<\/title>\n<meta name=\"description\" content=\"Le CETIM (Centre Technique des Industries M\u00e9caniques) a publi\u00e9 en d\u00e9cembre 2002, un \u00ab guide \u00e0 l\u2019usage des concepteurs, des utilisateurs et des fabricants \u00bb, qui concerne LES RESSORTS DE TRACTION. 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