{"id":6638,"date":"2026-09-11T11:18:43","date_gmt":"2026-09-11T03:18:43","guid":{"rendered":"https:\/\/miharmle-cnc.com\/?p=6638"},"modified":"2026-09-11T11:18:43","modified_gmt":"2026-09-11T03:18:43","slug":"etalonnage-du-bombage-dun-ensemble-de-presse-plieuse-en-tandem","status":"publish","type":"post","link":"https:\/\/miharmle-cnc.com\/fr\/blog\/tandem-press-brake-assembly-crowning-calibration\/","title":{"rendered":"Guide de montage de la presse plieuse tandem et d'\u00e9talonnage du bombage"},"content":{"rendered":"<h2>Pourquoi l'assemblage de pr\u00e9cision est-il essentiel pour une grande presse plieuse en tandem ?<\/h2>\n<p>A <strong>Presse plieuse en tandem<\/strong> associe deux presses plieuses \u00e0 commande num\u00e9rique pour plier des pi\u00e8ces tr\u00e8s longues et lourdes au sein d'un syst\u00e8me coordonn\u00e9.<\/p>\n<p>Cela pose un d\u00e9fi bien plus important en mati\u00e8re d'installation et de r\u00e9glage qu'une presse plieuse classique \u00e0 un seul pli.<\/p>\n<p>Par exemple, lorsque deux machines forment une ligne de pliage prolong\u00e9e, de l\u00e9g\u00e8res diff\u00e9rences au niveau de la machine, de la position du coulisseau, de la hauteur de l'outillage, de l'alignement du banc ou de la compensation de fl\u00e8che peuvent s'accumuler sur toute la longueur de pliage.<\/p>\n<p>Le r\u00e9sultat pourrait \u00eatre :<\/p>\n<ul>\n<li>Angles de courbure irr\u00e9guliers<\/li>\n<li>Des angles diff\u00e9rents entre les parties gauche et droite<\/li>\n<li>D\u00e9viation excessive par rapport au centre<\/li>\n<li>Torsion de pi\u00e8ces longues<\/li>\n<li>Manque de coh\u00e9rence dimensionnelle<\/li>\n<li>Augmentation des corrections et des retouches<\/li>\n<\/ul>\n<p>C'est pourquoi la pr\u00e9cision d'une grande presse plieuse en tandem commence bien avant le pliage de la premi\u00e8re pi\u00e8ce de s\u00e9rie.<\/p>\n<p>\u00c7a commence par <strong>assemblage de pr\u00e9cision et alignement g\u00e9om\u00e9trique<\/strong>.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6640\" src=\"https:\/\/miharmle-cnc.com\/wp-content\/uploads\/2026\/09\/Tandem-Press-Brake-Assembly-Crowning-Calibration-Guide.webp\" alt=\"Guide de montage de la presse plieuse tandem et de r\u00e9glage du bombage\" width=\"500\" height=\"280\" srcset=\"https:\/\/miharmle-cnc.com\/wp-content\/uploads\/2026\/09\/Tandem-Press-Brake-Assembly-Crowning-Calibration-Guide.webp 500w, https:\/\/miharmle-cnc.com\/wp-content\/uploads\/2026\/09\/Tandem-Press-Brake-Assembly-Crowning-Calibration-Guide-300x168.webp 300w, https:\/\/miharmle-cnc.com\/wp-content\/uploads\/2026\/09\/Tandem-Press-Brake-Assembly-Crowning-Calibration-Guide-18x10.webp 18w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/p>\n<h2>\u00c9tape 1 : Mettre en place une base solide pour la machine<\/h2>\n<p>Un syst\u00e8me tandem \u00e0 usage intensif n\u00e9cessite un environnement d'installation stable.<\/p>\n<p>Avant l'alignement d\u00e9finitif de la machine, il convient de v\u00e9rifier la fondation et la zone d'installation conform\u00e9ment aux exigences du fabricant de la machine.<\/p>\n<p>Les deux presses plieuses doivent ensuite \u00eatre positionn\u00e9es de mani\u00e8re \u00e0 ce que leurs zones de travail forment une r\u00e9f\u00e9rence de pliage coh\u00e9rente.<\/p>\n<p>Dans le cas des syst\u00e8mes en tandem, les installateurs doivent tenir compte non seulement du niveau de chaque machine prise individuellement, mais aussi de la relation <strong>entre les deux machines<\/strong>.<\/p>\n<p>Une machine correctement mise \u00e0 niveau individuellement peut n\u00e9anmoins poser des probl\u00e8mes de cintrage si son rep\u00e8re de travail n'est pas align\u00e9 avec celui de la presse plieuse adjacente.<\/p>\n<h2>\u00c9tape 2 : Aligner les deux tables de la presse plieuse<\/h2>\n<p>L'alignement des paliers est l'une des \u00e9tapes les plus importantes du montage d'un tandem.<\/p>\n<p>Les plans de travail inf\u00e9rieurs de la presse plieuse A et de la presse plieuse B doivent former une r\u00e9f\u00e9rence homog\u00e8ne sur toute la longueur de pliage combin\u00e9e.<\/p>\n<p>Les techniciens peuvent utiliser des appareils de mesure de pr\u00e9cision tels que :<\/p>\n<p><strong>niveaux de pr\u00e9cision, r\u00e8gles, syst\u00e8mes de mesure laser, comparateurs \u00e0 cadran et autres instruments d'alignement.<\/strong><\/p>\n<p>L'objectif est de r\u00e9duire au minimum les diff\u00e9rences relatives de hauteur et d'alignement entre les deux machines.<\/p>\n<p>Pour les pi\u00e8ces longues, m\u00eame de l\u00e9gers \u00e9carts peuvent \u00eatre visibles dans le r\u00e9sultat final du cintrage.<\/p>\n<h2>\u00c9tape 3 : V\u00e9rification de l'alignement du Ram et de l'outillage<\/h2>\n<p>Une fois les bancs de la machine align\u00e9s, l'attention se porte sur le syst\u00e8me de travail sup\u00e9rieur.<\/p>\n<p>Le v\u00e9rin, les porte-poin\u00e7ons, les poin\u00e7ons, les matrices inf\u00e9rieures et le syst\u00e8me de serrage doivent fonctionner ensemble comme une ligne de pliage en continu.<\/p>\n<p>Les techniciens doivent v\u00e9rifier :<\/p>\n<ul>\n<li>Parall\u00e9lisme de la m\u00e9moire vive (RAM)<\/li>\n<li>R\u00e9gularit\u00e9 de la hauteur de poin\u00e7onnage<\/li>\n<li>Uniformit\u00e9 de la hauteur des matrices<\/li>\n<li>Axe de l'outil<\/li>\n<li>Pr\u00e9cision de serrage<\/li>\n<li>Transition entre les deux machines<\/li>\n<\/ul>\n<p>C'est particuli\u00e8rement important aux abords de la <strong>zone de jonction entre la presse plieuse A et la presse plieuse B<\/strong>.<\/p>\n<p>Si la r\u00e9f\u00e9rence de l'outillage venait \u00e0 changer \u00e0 ce stade, la pi\u00e8ce longue pourrait pr\u00e9senter des r\u00e9sultats de cintrage diff\u00e9rents de chaque c\u00f4t\u00e9.<\/p>\n<h2>\u00c9tape 4 : Calibrage de la synchronisation multiaxiale<\/h2>\n<p>L'alignement m\u00e9canique d\u00e9finit la r\u00e9f\u00e9rence physique. La synchronisation CNC maintient cette relation pendant le mouvement.<\/p>\n<p>Une grande presse plieuse tandem \u00e0 commande num\u00e9rique peut coordonner plusieurs axes de pliage entre les deux machines.<\/p>\n<p>Dans une configuration simplifi\u00e9e :<\/p>\n<p><strong>Machine A \u2192 Y1 + Y2<\/strong><\/p>\n<p><strong>Machine B \u2192 Y3 + Y4<\/strong><\/p>\n<p>Des r\u00e8gles lin\u00e9aires ou d'autres dispositifs de r\u00e9troaction de position surveillent la position r\u00e9elle des v\u00e9rins et transmettent ces informations au syst\u00e8me CNC.<\/p>\n<p>Le processus de contr\u00f4le suit une boucle continue :<\/p>\n<p><strong>Commande \u2192 Mouvement \u2192 Retour d'information sur la position \u2192 Comparaison des erreurs \u2192 Correction<\/strong><\/p>\n<p>L'objectif est de maintenir tous les axes de pliage concern\u00e9s dans les limites de la tol\u00e9rance de synchronisation sp\u00e9cifi\u00e9e pour la machine tout au long des phases d'approche, de pliage, de d\u00e9compression et de retour.<\/p>\n<p>Cet \u00e9talonnage doit \u00eatre effectu\u00e9 avant d'\u00e9valuer la pr\u00e9cision finale de la cintrage.<\/p>\n<h2>Pourquoi une presse plieuse tandem a-t-elle besoin d'un bombage ?<\/h2>\n<p>M\u00eame lorsque les machines sont parfaitement align\u00e9es, un autre probl\u00e8me se pose lors du pliage de pi\u00e8ces longues : <strong>d\u00e9viation<\/strong>.<\/p>\n<p>Sous l'effet d'une charge de flexion, le coulisseau, le banc, l'outillage et la structure de la machine subissent une d\u00e9formation \u00e9lastique.<\/p>\n<p>Sans compensation appropri\u00e9e, l'angle de pliage au centre d'une pi\u00e8ce longue peut diff\u00e9rer de celui observ\u00e9 pr\u00e8s des extr\u00e9mit\u00e9s.<\/p>\n<p>C'est l\u00e0 qu'un <strong>syst\u00e8me de bombage pour presse plieuse<\/strong> prend de l'importance.<\/p>\n<p>Le bombage permet d'introduire une compensation calcul\u00e9e sur toute la longueur de flexion afin de contrebalancer la d\u00e9formation sous charge.<\/p>\n<p>L'objectif n'est pas simplement de rendre le banc de la machine \u201c courb\u00e9 \u201d.\u201d<\/p>\n<p>L'objectif est le suivant :<\/p>\n<blockquote><p><strong>Afin d'obtenir un angle de pliage plus uniforme sur l'ensemble de la pi\u00e8ce sous une charge de pliage r\u00e9elle.<\/strong><\/p><\/blockquote>\n<h2>Bombage m\u00e9canique vs bombage \u00e0 commande num\u00e9rique (CNC)<\/h2>\n<p>Les grandes presses plieuses peuvent utiliser diff\u00e9rentes architectures de compensation.<\/p>\n<h3>Bombage m\u00e9canique<\/h3>\n<p>Un syst\u00e8me de bombage m\u00e9canique utilise g\u00e9n\u00e9ralement des cales r\u00e9parties le long du banc de la machine.<\/p>\n<p>Le r\u00e9glage de leurs positions relatives modifie le profil de compensation sur toute la longueur de flexion.<\/p>\n<p>Cette solution peut s'av\u00e9rer fiable et efficace lorsqu'elle est correctement calibr\u00e9e.<\/p>\n<h3>Bombage \u00e0 commande num\u00e9rique (CNC)<\/h3>\n<p>Gr\u00e2ce au bombage \u00e0 commande num\u00e9rique, le contr\u00f4leur peut calculer ou commander la compensation en fonction des param\u00e8tres de cintrage.<\/p>\n<p>Selon la conception de la machine, les donn\u00e9es d'entr\u00e9e peuvent inclure :<\/p>\n<ul>\n<li>Mat\u00e9riau<\/li>\n<li>\u00c9paisseur<\/li>\n<li>Longueur de pliage<\/li>\n<li>Force de flexion<\/li>\n<li>Ouverture de la matrice en V<\/li>\n<li>Configuration de l'outillage<\/li>\n<\/ul>\n<p>L'op\u00e9rateur peut alors affiner la compensation en fonction des r\u00e9sultats r\u00e9els obtenus lors des essais de flexion.<\/p>\n<p>Pour les applications en tandem de grande envergure impliquant des changements fr\u00e9quents de t\u00e2ches, un r\u00e9glage \u00e0 commande num\u00e9rique peut faciliter la mise en place.<\/p>\n<h2>Comment proc\u00e8de-t-on au r\u00e9glage du bombage sur une presse plieuse tandem ?<\/h2>\n<p>L'\u00e9talonnage de la couronne doit \u00eatre consid\u00e9r\u00e9 comme un \u00e9talonnage complet du syst\u00e8me de flexion plut\u00f4t que comme un r\u00e9glage isol\u00e9.<\/p>\n<h3>1. V\u00e9rifier la g\u00e9om\u00e9trie m\u00e9canique<\/h3>\n<p>Il convient de v\u00e9rifier au pr\u00e9alable le niveau de la machine, l'alignement du banc, le parall\u00e9lisme des v\u00e9rins, l'outillage et la synchronisation.<\/p>\n<p>La pose d\u2019une couronne ne doit pas servir \u00e0 masquer un probl\u00e8me d\u2019alignement m\u00e9canique sous-jacent.<\/p>\n<h3>2. Installer et inspecter le<\/h3>\n<h2><strong>Lectures recommand\u00e9es :<\/strong><\/h2>\n<p><a href=\"https:\/\/miharmle-cnc.com\/fr\/blog\/presse-plieuse-tandem-a-synchronisation-multiaxiale\/\"><strong data-start=\"11176\" data-end=\"11254\">Fonctionnement de la synchronisation m\u00e9canique multiaxiale dans les presses plieuses CNC en tandem<\/strong> <\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Why Is Precision Assembly Critical for a Large Tandem Press Brake? A Tandem Press Brake combines two CNC press brakes to bend extra-long and heavy workpieces as one coordinated system. This creates a much greater installation and calibration challenge than a conventional single press brake. For example, when two machines form one extended bending line,&#8230;<\/p>","protected":false},"author":3,"featured_media":6640,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6638","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Tandem Press Brake Assembly &amp; Crowning Calibration Guide - MIHARMLE<\/title>\n<meta name=\"description\" content=\"Learn how precision assembly, machine alignment, Y-axis synchronization and crowning calibration improve accuracy on large CNC Tandem Press Brakes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/miharmle-cnc.com\/fr\/blog\/etalonnage-du-bombage-dun-ensemble-de-presse-plieuse-en-tandem\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tandem Press Brake Assembly &amp; 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