<\/div>\n
Architecture motoris\u00e9e<\/h2>
Un banc motoris\u00e9 moderne comprend : une structure m\u00e9canique rigide (colonne simple, double colonne ou portique pour les charges \u00e9lev\u00e9es) ; un servomoteur brushless avec entra\u00eenement \u00e0 vis \u00e0 billes ou par courroie pour d\u00e9placer le chariot ; un codeur haute r\u00e9solution pour la mesure de position et de vitesse ; un r\u00e9gulateur PID pour maintenir la vitesse sous charge ; des fins de course mat\u00e9riels et logiciels pour prot\u00e9ger le syst\u00e8me ; un afficheur de commande (\u00e9cran tactile ou clavier d\u00e9di\u00e9) ; un PC en option dot\u00e9 d’un logiciel d’analyse \u00e9volu\u00e9. Le dynamom\u00e8tre ou la cellule de charge est mont\u00e9 sur le chariot mobile ou sur l’extr\u00e9mit\u00e9 fixe. <\/p>
Performances<\/h2>
Les performances habituelles des bancs motoris\u00e9s sont : charge maximale de 500 N \u00e0 50 kN (bancs de puissance moyenne) ; course utile de 500 \u00e0 1500 mm ; vitesse d’essai programmable de 0,01 \u00e0 1000 mm\/min avec une stabilit\u00e9 de \u00b10,5 % sous charge ; r\u00e9solution de position g\u00e9n\u00e9ralement de 0,01 mm ; s\u00e9curit\u00e9 avec arr\u00eat automatique \u00e0 l’atteinte de la pleine \u00e9chelle de charge ou de d\u00e9placement. Les mod\u00e8les les plus \u00e9volu\u00e9s g\u00e8rent des profils d’essai complexes (rampes multiples, cycles de fatigue, maintien sous charge pour les \u00e9tudes de fluage, essais de relaxation) et des courbes d’analyse (module d’\u00e9lasticit\u00e9, limite d’\u00e9lasticit\u00e9, \u00e9nergie \u00e0 la rupture). <\/p>
Logiciel d\u00e9di\u00e9<\/h2>
Le logiciel de conduite du banc motoris\u00e9 permet de : d\u00e9finir des programmes d’essai normalis\u00e9s (par exemple \u00ab traction sur c\u00e2ble \u00e9lectrique selon ISO 6892 \u00bb) ; lancer l’essai d’un clic ; acqu\u00e9rir en temps r\u00e9el la courbe force-d\u00e9placement ; calculer automatiquement les param\u00e8tres utiles (charge maximale, allongement \u00e0 la rupture, module d’\u00e9lasticit\u00e9, \u00e9nergie absorb\u00e9e) ; \u00e9diter des rapports normalis\u00e9s conformes aux normes ; archiver les donn\u00e9es avec tra\u00e7abilit\u00e9 de l’\u00e9prouvette, de l’op\u00e9rateur et de la machine ; exporter vers des formats universels (CSV, Excel, PDF, Q-DAS) ; s’int\u00e9grer aux LIMS et MES de l’entreprise pour la gestion globale de la qualit\u00e9.<\/p>
Applications<\/h2>
Les bancs motoris\u00e9s servent \u00e0 des essais normalis\u00e9s sur : ressorts (contr\u00f4le de la raideur, charge \u00e0 des positions donn\u00e9es, essais de fatigue) ; c\u00e2bles \u00e9lectriques (traction, allongement, tenue des isolants) ; cosses serties (pull-test selon CEI 60352) ; tissus (r\u00e9sistance \u00e0 la traction, d\u00e9chirure) ; caoutchoucs (traction, compression, duret\u00e9 Shore avec cellule motoris\u00e9e) ; plastiques (flexion trois points, traction sur \u00e9prouvettes normalis\u00e9es) ; \u00e9lastiques et rubans \u00e9lastiques ; composants m\u00e9dicaux (seringues, cath\u00e9ters) ; produits d’emballage (bouchages, scellages, top-load) ; articles de sport ; organes m\u00e9caniques de pr\u00e9cision.<\/p>
Crit\u00e8res de choix<\/h2>
Le choix du banc motoris\u00e9 d\u00e9pend de la charge maximale (\u00e0 retenir avec une marge de s\u00e9curit\u00e9 par rapport aux essais courants), de la vitesse minimale requise (pour les essais lents de fluage), de la course utile, de la rigidit\u00e9 m\u00e9canique de la structure, des normes d’essai applicables, de la disponibilit\u00e9 d’un logiciel de conduite appropri\u00e9 (certaines normes exigent des logiciels valid\u00e9s) et des interfaces d’int\u00e9gration aux LIMS. Pour les laboratoires multiproduits, on pr\u00e9f\u00e9rera des bancs modulaires \u00e0 cellules de charge interchangeables. <\/p>","protected":false},"excerpt":{"rendered":"
Bancs d’essai motoris\u00e9s \u00e0 contr\u00f4le de vitesse et profils de charge pour des essais r\u00e9p\u00e9tables.<\/p>\n","protected":false},"author":157040980,"featured_media":0,"parent":19381,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_wpcom_ai_launchpad_about_page":false,"_wpcom_ai_launchpad_gallery_page":false,"_wpcom_ai_launchpad_contact_page":false,"_wpcom_ai_launchpad_events_page":false,"_wpcom_ai_launchpad_video_page":false,"_wpcom_ai_launchpad_portfolio_piece":false,"footnotes":""},"class_list":["post-22585","page","type-page","status-publish","hentry"],"yoast_head":"\n
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