{"id":25888,"date":"2015-09-02T10:29:33","date_gmt":"2015-09-02T10:29:33","guid":{"rendered":"https:\/\/www.hgg-group.com\/knowledge\/percage-proportionnel-controle-pour-les-materiaux-epais\/"},"modified":"2024-09-19T13:13:45","modified_gmt":"2024-09-19T13:13:45","slug":"percage-proportionnel-controle-pour-les-materiaux-epais","status":"publish","type":"knowledge","link":"https:\/\/www.hgg-group.com\/fr\/connaissances\/percage-proportionnel-controle-pour-les-materiaux-epais\/","title":{"rendered":"Per\u00e7age proportionnel contr\u00f4l\u00e9 pour les mat\u00e9riaux \u00e9pais"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"25888\" class=\"elementor elementor-25888 elementor-5036\" data-elementor-post-type=\"knowledge\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4aa8cba e-flex e-con-boxed e-con e-parent\" data-id=\"4aa8cba\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6543d2c elementor-widget elementor-widget-text-editor\" data-id=\"6543d2c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Lors de la d\u00e9coupe de mat\u00e9riaux \u00e0 parois \u00e9paisses, comme les cuves sous pression, il est difficile de d\u00e9finir le temps et la temp\u00e9rature parfaits pour le pr\u00e9chauffage afin que m\u00eame la partie la plus profonde du mat\u00e9riau soit chauff\u00e9e \u00e0 la bonne temp\u00e9rature.<br \/>\nCela demande beaucoup de pratique et d&rsquo;exp\u00e9rience. <\/strong><\/p>\n<p class=\"p1\">Lorsque des mat\u00e9riaux \u00e0 parois \u00e9paisses sont pr\u00e9chauff\u00e9s un peu trop longtemps, l&rsquo;apport d&rsquo;oxyg\u00e8ne provoque de nombreuses \u00e9claboussures et cr\u00e9e un grand crat\u00e8re.<br \/>\nCela est d\u00fb \u00e0 l&rsquo;\u00e9paisseur de la paroi et \u00e0 la quantit\u00e9 excessive de scories liquides.<br \/>\nEn revanche, si le pr\u00e9chauffage est insuffisant, l&rsquo;\u00e9paisseur totale de la paroi n&rsquo;atteindra pas la temp\u00e9rature d&rsquo;allumage n\u00e9cessaire pour maintenir le processus exothermique.<br \/>\nLe processus s&rsquo;arr\u00eatera \u00e0 mi-chemin et l&rsquo;op\u00e9rateur devra r\u00e9essayer \u00e0 un autre point de d\u00e9part, et les dommages caus\u00e9s au contour du raccord n\u00e9cessiteront beaucoup plus de meulage et de soudage.   <\/p>\n<h3>Per\u00e7age proportionnel<\/h3>\n<p>Pour automatiser ce processus, il est possible d&rsquo;appliquer une m\u00e9thode appel\u00e9e per\u00e7age proportionnel, qui consiste \u00e0 r\u00e9guler le flux d&rsquo;oxyg\u00e8ne afin de contr\u00f4ler le processus exothermique pendant le per\u00e7age.<br \/>\nApr\u00e8s une tr\u00e8s courte p\u00e9riode de pr\u00e9chauffage pour que la surface du mat\u00e9riau atteigne la temp\u00e9rature d&rsquo;allumage, le processus de per\u00e7age d\u00e9marre \u00e0 une faible pression d&rsquo;oxyg\u00e8ne.<br \/>\nLorsque la torche commence \u00e0 se d\u00e9placer vers le point d&rsquo;initialisation du contour programm\u00e9 du raccord, elle change progressivement d&rsquo;angle tout en augmentant progressivement la pression d&rsquo;oxyg\u00e8ne jusqu&rsquo;\u00e0 la pression maximale afin de maintenir le processus exothermique et de percer plus profond\u00e9ment.<br \/>\nL&rsquo;inclinaison cr\u00e9e de l&rsquo;espace pour le laitier liquide et entra\u00eene un minimum de projections (protection de la pointe de coupe).   <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dac5ec8 elementor-widget elementor-widget-image\" data-id=\"dac5ec8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"407\" src=\"https:\/\/www.hgg-group.com\/wp-content\/uploads\/2024\/05\/Oxyfuel-proportional-piercing-watermark-1024x521.jpg\" class=\"attachment-large size-large wp-image-8577\" alt=\"\" srcset=\"https:\/\/www.hgg-group.com\/wp-content\/uploads\/2024\/05\/Oxyfuel-proportional-piercing-watermark-1024x521.jpg 1024w, https:\/\/www.hgg-group.com\/wp-content\/uploads\/2024\/05\/Oxyfuel-proportional-piercing-watermark-300x153.jpg 300w, https:\/\/www.hgg-group.com\/wp-content\/uploads\/2024\/05\/Oxyfuel-proportional-piercing-watermark-768x391.jpg 768w, https:\/\/www.hgg-group.com\/wp-content\/uploads\/2024\/05\/Oxyfuel-proportional-piercing-watermark.jpg 1394w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Ma\u00eetrisez la d\u00e9coupe de mat\u00e9riaux \u00e0 parois \u00e9paisses tels que les appareils \u00e0 pression gr\u00e2ce \u00e0 notre guide sur le per\u00e7age proportionnel.<br \/>\nApprenez \u00e0 contr\u00f4ler la temp\u00e9rature et le d\u00e9bit d&rsquo;oxyg\u00e8ne pour un pr\u00e9chauffage et un per\u00e7age parfaits, en minimisant les \u00e9claboussures et en maximisant l&rsquo;efficacit\u00e9. <\/p>\n","protected":false},"featured_media":5039,"template":"","knowledge-tag":[370],"class_list":["post-25888","knowledge","type-knowledge","status-publish","has-post-thumbnail","hentry","knowledge-tag-cutting-fr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Per\u00e7age proportionnel contr\u00f4l\u00e9 pour les 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