{"id":3215,"date":"2020-07-31T09:02:36","date_gmt":"2020-07-31T09:02:36","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=3215"},"modified":"2020-07-31T09:02:36","modified_gmt":"2020-07-31T09:02:36","slug":"aluminum-slab-bending-analysis","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminum-slab-bending-analysis\/","title":{"rendered":"Analyse du cintrage d'une plaque d'aluminium"},"content":{"rendered":"<p><strong>Il existe deux causes principales au ralentissement du cintrage des brames d'aluminium :<\/strong><\/p>\n<p>(1) La t\u00eate de la barre factice du lingot plat n'est pas positionn\u00e9e correctement, et les deux grandes surfaces ou c\u00f4t\u00e9s oppos\u00e9s ne se trouvent pas sur le m\u00eame plan horizontal lorsqu'ils sont en contact avec la base, ce qui se traduit par un c\u00f4t\u00e9 plus haut et un c\u00f4t\u00e9 plus bas.<\/p>\n<p>(2) Au cours de la <a href=\"http:\/\/www.alalloycasting.com\/fr\/aluminium-casting-process-and-extrusion-process\/\">proc\u00e9d\u00e9 de moulage<\/a>, les s\u00e9diments et autres impuret\u00e9s pr\u00e9sents dans l'eau de refroidissement obstruent les orifices d'eau de la chemise d'eau du moule, ce qui entra\u00eene une diff\u00e9rence d'intensit\u00e9 de refroidissement entre les deux grandes faces ou les deux c\u00f4t\u00e9s du lingot plat. Le c\u00f4t\u00e9 pr\u00e9sentant une intensit\u00e9 de refroidissement \u00e9lev\u00e9e se solidifie en premier, tandis que celui pr\u00e9sentant une intensit\u00e9 de refroidissement faible se solidifie plus tard. Sous l\u2019effet des contraintes de coul\u00e9e et de sa propre gravit\u00e9, le lingot plat se courbe l\u00e9g\u00e8rement vers le c\u00f4t\u00e9 pr\u00e9sentant une faible intensit\u00e9 de refroidissement. Au fur et \u00e0 mesure que le processus de coul\u00e9e se poursuit, la longueur du lingot plat augmente progressivement, et ce l\u00e9ger fl\u00e9chissement s\u2019accumule peu \u00e0 peu et se manifeste, formant ainsi une d\u00e9formation lente et chronique.<\/p>\n<p><strong>Il existe trois causes \u00e0 la d\u00e9formation par flexion des brames en alliage d'aluminium :<\/strong><\/p>\n<p>(1) La t\u00eate de la barre factice du lingot plat n'est pas correctement positionn\u00e9e ; le contact entre sa partie inf\u00e9rieure et la base n'est pas complet et il y a un jeu.<\/p>\n<div class=\"bd\">\n<div id=\"reader-translate-marker\">(2) La surface de contact entre la base du lingot plat et la t\u00eate factice est r\u00e9duite. La t\u00eate factice du lingot plat est rectangulaire et pr\u00e9sente une base plane. Lorsque l\u2019aluminium fondu est refroidi et se solidifie au niveau de la t\u00eate factice, la partie centrale se solidifie en premier, puis s\u2019\u00e9coule vers la zone environnante. Comme la solidification s'effectue en peu de temps et qu'elle est influenc\u00e9e par la fluidit\u00e9 du m\u00e9tal et les gaz produits par l'eau de refroidissement, il est impossible que l'aluminium liquide remplisse enti\u00e8rement la t\u00eate factice apr\u00e8s le retrait de solidification. Par cons\u00e9quent, la forme de la base du lingot plat est arqu\u00e9e.<\/div>\n<div><\/div>\n<div>(3) Une fuite d'aluminium se produit au milieu de la partie inf\u00e9rieure du lingot plat lors de l'op\u00e9ration de renfort. Lors de la coul\u00e9e du lingot plat, la premi\u00e8re \u00e9tape consiste \u00e0 former le fond. Si le fond est bien r\u00e9alis\u00e9, le risque de d\u00e9formation du lingot plat sera moindre.<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>There are two main causes of aluminum slab slow bending: (1) The dummy bar head of the flat ingot is not placed smoothly, and the&hellip;<\/p>","protected":false},"author":1,"featured_media":3219,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[1758,1759],"class_list":["post-3215","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-aluminum-slab-bending-analysis","tag-aluminum-slab-casting"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Aluminum Slab Bending Analysis, Aluminum Slab Casting<\/title>\n<meta name=\"description\" content=\"The unsteady placement of the die head of the cast 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