Réalisation d'une électroérosion à fil avec une électrode en cuivre et un acier pour moule en plastique P20
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Usinage par �lectro�rosion (EDM). Il est capable d'usiner des structures de g�om�trie tr�s complexe, des composants en mat�riaux durs, pr�cis et difficiles � usiner tels que les composites, les c�ramiques, les carbures, les m�taux durs, etc. largement utilis�s dans les industries de fabrication de matrices et de moules, l'a�rospatiale, les chemins de fer, l'a�ronautique et les industries nucl�aires. Acier pour moules en plastique AISI P20 g�n�ralement fourni � l'�tat tremp� et revenu. Bonne usinabilit�, meilleure aptitude au polissage, ces aciers sont class�s comme des mat�riaux difficiles � usiner, ont une r�sistance et une t�nacit� sup�rieures et sont g�n�ralement connus pour cr�er des d�fis majeurs lors de l'usinage conventionnel et non conventionnel. Le processus E.D.M permet de d�terminer l'impact des param�tres d'usinage tels que le diam�tre de l'outil, le courant de d�charge et le temps d'impulsion sur le mat�riau de la pi�ce � usiner. Utilisation d'un outil en cuivre en forme de U avec rin�age interne. Un sch�ma exp�rimental bien con�u a �t� utilis� pour r�duire le nombre total d'exp�riences. Certaines parties de l'exp�rience ont �t� men�es avec le tableau orthogonal L18 bas� sur la m�thode Taguchi. Les valeurs observ�es des r�ponses du taux d'enl�vement de mati�re (MRR), du taux d'usure de l'outil (TWR) et de la surcoupe (OC).
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