{"id":24988,"date":"2026-11-04T16:09:43","date_gmt":"2026-11-04T08:09:43","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=24988"},"modified":"2026-11-04T16:37:40","modified_gmt":"2026-11-04T08:37:40","slug":"aluminum-extrusion-die-correction","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/aluminum-extrusion-die-correction\/","title":{"rendered":"Corre\u00e7\u00e3o de uma matriz de extrus\u00e3o de alum\u00ednio: o que alterar e em que ordem"},"content":{"rendered":"<h1 class=\"wp-block-heading\">Corre\u00e7\u00e3o de uma matriz de extrus\u00e3o de alum\u00ednio: o que alterar e em que ordem<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Nenhuma matriz sai da eletroeros\u00e3o a fio produzindo a forma que seu desenho prometia. O fluxo de metal, a deflex\u00e3o da matriz sob carga e a temperatura ao longo da guia n\u00e3o s\u00e3o totalmente previs\u00edveis, ent\u00e3o a matriz \u00e9 testada na prensa e corrigida. A corre\u00e7\u00e3o \u00e9 onde uma ferramentaria constr\u00f3i sua reputa\u00e7\u00e3o, e ela segue uma ordem: verificar primeiro a prensa e o conjunto de ferramentas, depois as oito vari\u00e1veis de processo, depois a pr\u00f3pria matriz, os portes antes das guias em uma matriz oca. Esta p\u00e1gina apresenta essa ordem e a raz\u00e3o dela.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Primeiro: coisas que parecem defeito de matriz e n\u00e3o s\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Antes que um cortador se aproxime da matriz, o lado da prensa precisa ser descartado. A lista publicada de falhas de prensa que se apresentam como problemas de matriz \u00e9 curta e espec\u00edfica, e cada item dela j\u00e1 foi atribu\u00eddo a uma matriz em algum momento.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">O que voc\u00ea v\u00ea<\/th><th class=\"has-text-align-left\" data-align=\"left\">O que verificar antes de tocar na matriz<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">Perfil sai fora de esquadro, ou um lado est\u00e1 pesado ao longo de todo o comprimento<\/td><td class=\"has-text-align-left\" data-align=\"left\">Alinhamento e ajuste da prensa; a planicidade do anel de press\u00e3o<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Metal escapa na face da matriz, ou aparece uma linha de rebarba<\/td><td class=\"has-text-align-left\" data-align=\"left\">Veda\u00e7\u00e3o entre a matriz e o liner do container; um furo de liner desgastado<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">A extremidade traseira do tarugo se comporta de forma diferente da dianteira<\/td><td class=\"has-text-align-left\" data-align=\"left\">Um disco de press\u00e3o desgastado que n\u00e3o veda mais contra o liner<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">O conjunto se move ou o perfil muda quando a prensa carrega<\/td><td class=\"has-text-align-left\" data-align=\"left\">Um conjunto de ferramentas inadequado; suporte insuficiente atr\u00e1s da matriz, de modo que ela deflete<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Uma parte da se\u00e7\u00e3o fica sem metal a cada corrida<\/td><td class=\"has-text-align-left\" data-align=\"left\">Temperatura da matriz ou do container; se a matriz \u00e9 assentada e centrada da mesma forma a cada vez<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">As oito vari\u00e1veis que alteram o funcionamento de uma matriz<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A mesma matriz se comporta de forma diferente entre turnos porque o processo ao seu redor muda. Estas s\u00e3o as vari\u00e1veis pelas quais a corre\u00e7\u00e3o deve ser avaliada, e todas elas s\u00e3o mais baratas de alterar do que a matriz:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Temperatura da matriz<\/li><li>Temperatura do tarugo em rela\u00e7\u00e3o \u00e0 temperatura do container<\/li><li>Aquecimento com gradiente ao longo do tarugo<\/li><li>Velocidade de extrus\u00e3o<\/li><li>Alinhamento e ajuste da prensa<\/li><li>Deflex\u00e3o do conjunto de matrizes<\/li><li>Rota\u00e7\u00e3o da matriz para mudar sua posi\u00e7\u00e3o na prensa<\/li><li>Lubrificante, e o uso de um guia de cartucho<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Duas dessas valem mais do que as demais na pr\u00e1tica. Rotacionar a matriz \u00e9 gratuito e testa se o defeito acompanha a matriz ou a prensa: se o lado pesado se move com a matriz, \u00e9 a matriz; se permanece no mesmo lado da prensa, \u00e9 a prensa. E o aquecimento com gradiente testa se o defeito \u00e9 t\u00e9rmico: um tarugo mais quente na frente extrusa de forma diferente de um aquecido uniformemente, e a diferen\u00e7a aparece como uma forma que muda da frente da corrida para o final.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Matrizes maci\u00e7as: cortar a bolsa ou a guia, e medir o corte<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Em uma matriz maci\u00e7a, a corre\u00e7\u00e3o \u00e9 uma modifica\u00e7\u00e3o na bolsa ou na placa de alimenta\u00e7\u00e3o, ou uma altera\u00e7\u00e3o no comprimento da guia, feita a partir da frente da matriz ou do lado de sa\u00edda. O m\u00e9todo importa tanto quanto a localiza\u00e7\u00e3o. A pr\u00e1tica publicada \u00e9 cortar com uma fresadora em vez de uma retificadora flex\u00edvel, porque um corte de fresagem pode ser medido e registrado. Uma retificadora remove metal que ningu\u00e9m consegue quantificar, e a pr\u00f3xima corre\u00e7\u00e3o parte de um desconhecido.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O n\u00famero registrado \u00e9 o objetivo do exerc\u00edcio. Se a corre\u00e7\u00e3o for um comprimento de guia, o valor volta para o projetista da matriz; se for uma altera\u00e7\u00e3o dimensional, o valor volta para o fabricante da matriz para que o programa de eletroeros\u00e3o a fio mude na pr\u00f3xima matriz daquela forma. Uma corre\u00e7\u00e3o que n\u00e3o \u00e9 registrada \u00e9 paga novamente no pr\u00f3ximo pedido.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Matrizes ocas: portes antes das guias<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Uma matriz oca \u00e9 mais dif\u00edcil porque o metal passa por tr\u00eas est\u00e1gios: pelos portes no mandril, pela c\u00e2mara de solda e pela guia. Os portes decidem quanto metal cada perna do perfil recebe, ent\u00e3o eles definem o balanceamento. As guias apenas decidem quanta resist\u00eancia esse metal encontra na sa\u00edda. Corrigir a guia primeiro em uma matriz cujos portes est\u00e3o desbalanceados \u00e9 a cl\u00e1ssica tarde perdida: a guia n\u00e3o vai corrigir uma perna que est\u00e1 sendo subalimentada.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Os defeitos que mandam uma matriz oca de volta \u00e0 bancada s\u00e3o espec\u00edficos, e cada um aponta para um est\u00e1gio:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Defeito<\/th><th class=\"has-text-align-left\" data-align=\"left\">Onde olhar primeiro<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">Tor\u00e7\u00e3o ao longo do comprimento<\/td><td class=\"has-text-align-left\" data-align=\"left\">Balanceamento dos portes entre as pernas, depois distribui\u00e7\u00e3o das guias<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Angularidade fora de toler\u00e2ncia<\/td><td class=\"has-text-align-left\" data-align=\"left\">Volume do porte que alimenta as duas paredes que formam o \u00e2ngulo<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Canto aberto ou canto dividido<\/td><td class=\"has-text-align-left\" data-align=\"left\">C\u00e2mara de solda e o porte que alimenta o canto<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Parede convexa ou c\u00f4ncava<\/td><td class=\"has-text-align-left\" data-align=\"left\">Comprimento de apoio ao longo dessa parede e suporte atr\u00e1s dela<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Espessura de parede irregular<\/td><td class=\"has-text-align-left\" data-align=\"left\">Primeiro o balanceamento dos ports; depois o apoio<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Mais uma vari\u00e1vel pertence exclusivamente \u00e0 matriz oca: a profundidade da ponte e a forma da c\u00e2mara de solda. Ambas s\u00e3o definidas no projeto e ambas alteram como os dois fluxos se encontram. Se os defeitos se repetem em matrizes do mesmo projeto, a corre\u00e7\u00e3o pertence ao projeto, n\u00e3o \u00e0 bancada.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">O corretor de matriz pertence \u00e0 prensa<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O procedimento publicado \u00e9 direto quanto a isso: quem corrige a matriz deve estar junto \u00e0 prensa durante o teste, n\u00e3o lendo um relat\u00f3rio depois. Estar presente d\u00e1 acesso simult\u00e2neo \u00e0s vari\u00e1veis da prensa, do tarugo e da matriz, o que separa uma corre\u00e7\u00e3o de um palpite, e permite informar ao fabricante da matriz o que mudar quando a solu\u00e7\u00e3o est\u00e1 al\u00e9m da bancada.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Na pr\u00e1tica, isso significa dois registros por teste: os ajustes de processo sob os quais a matriz operou e a forma da primeira pe\u00e7a. Sem os ajustes, uma matriz que operou mal n\u00e3o pode ser distinguida de uma matriz que operou mal porque a prensa estava fria.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">O que isso significa para um pedido de a\u00e7o para matrizes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A corre\u00e7\u00e3o \u00e9 remo\u00e7\u00e3o de metal, ent\u00e3o a matriz precisa suport\u00e1-la. O a\u00e7o para matriz de extrus\u00e3o \u00e9 a\u00e7o cromo para trabalho a quente, AISI H13 e seu equivalente europeu 1.2344, fornecido recozido para que um apoio possa ser recortado novamente e uma cavidade usinada de novo; a dureza de trabalho e o revenimento que a atinge est\u00e3o na p\u00e1gina do a\u00e7o para matrizes, e a nitreta\u00e7\u00e3o que segue uma corre\u00e7\u00e3o, na p\u00e1gina de nitreta\u00e7\u00e3o. O programa 1.2344 ESR para ferramental de extrus\u00e3o est\u00e1 em <a href=\"https:\/\/aobosteel.com\/pt\/1-2344-esr-h13-aluminum-extrusion-distributors\/\">p\u00e1gina de fornecimento de extrus\u00e3o 1.2344 ESR H13<\/a>, o grau em <a href=\"https:\/\/aobosteel.com\/pt\/h13-tool-steel\/\">p\u00e1gina do a\u00e7o ferramenta H13<\/a>, e a camada no <a href=\"https:\/\/aobosteel.com\/pt\/tool-steel-nitriding-guide\/\">p\u00e1gina de nitreta\u00e7\u00e3o de a\u00e7o ferramenta<\/a>. O apoio que \u00e9 recortado novamente est\u00e1 descrito em <a href=\"https:\/\/aobosteel.com\/pt\/aluminum-extrusion-die-bearing-length\/\">p\u00e1gina de comprimento de apoio da matriz<\/a>, o conjunto ao seu redor na <a href=\"https:\/\/aobosteel.com\/pt\/aluminum-extrusion-die-types-and-tooling\/\">p\u00e1gina de tipos de matrizes e ferramental<\/a>, os defeitos que n\u00e3o s\u00e3o culpa da matriz em <a href=\"https:\/\/aobosteel.com\/pt\/aluminum-extrusion-pick-up-and-die-lines\/\">p\u00e1gina de linhas de pick-up e de molde<\/a>, e a janela da prensa em <a href=\"https:\/\/aobosteel.com\/pt\/aluminum-extrusion-temperature\/\">p\u00e1gina de temperatura de extrus\u00e3o<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O liner e o bloco fict\u00edcio que vedam contra essa face da matriz est\u00e3o na <a href=\"https:\/\/aobosteel.com\/pt\/extrusion-container-liner-and-dummy-block\/\">p\u00e1gina do liner do container e do bloco fict\u00edcio<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Antes de cortar uma matriz a partir desta p\u00e1gina<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Estes s\u00e3o os princ\u00edpios publicados e as categorias de defeitos, n\u00e3o um cronograma de corre\u00e7\u00e3o para uma matriz espec\u00edfica. A quantidade a remover de um apoio ou de um port \u00e9 definida pela matriz, pela liga, pela prensa e pelo teste, e nenhuma tabela se transfere entre oficinas. A ordem das verifica\u00e7\u00f5es \u00e9 a parte que se transfere. A corre\u00e7\u00e3o final \u00e9 confirmada na prensa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fonte: Aluminum Extrusion Technology, P. K. Saha, ASM International, 2000, se\u00e7\u00e3o 4 corre\u00e7\u00e3o de matriz, p\u00e1ginas 105 a 108.<\/p>","protected":false},"excerpt":{"rendered":"<p>Correcting an Aluminum Extrusion Die: What to Change, and in What Order No die comes off the wire EDM running the shape its drawing promised. The metal flow, the die deflection under load and the temperature along the bearing are not fully predictable, so the die is tried at the press and corrected. The correction [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-24988","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.8 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Aluminum Extrusion Die Correction | Aobo Steel<\/title>\n<meta name=\"description\" content=\"Rule out the press first, then the eight process variables, then ports before bearings. 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