{"id":20120,"date":"2024-05-23T07:58:04","date_gmt":"2024-05-22T23:58:04","guid":{"rendered":"https:\/\/firstmold.com\/?p=20120"},"modified":"2025-07-15T13:33:01","modified_gmt":"2025-07-15T05:33:01","slug":"climb-milling-and-conventional-milling","status":"publish","type":"post","link":"https:\/\/firstmold.com\/fr\/guides\/climb-milling-and-conventional-milling\/","title":{"rendered":"S\u00e9lection du fraisage de mont\u00e9e et du fraisage conventionnel dans l'usinage CNC"},"content":{"rendered":"<p>Dans le processus de fraisage des machines CNC, le choix entre le fraisage en avalanche et le fraisage conventionnel est une question technique importante qui affecte grandement la pr\u00e9cision et la qualit\u00e9 de la surface des pi\u00e8ces.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-definition-of-climb-milling-and-conventional-milling\">D\u00e9finition du fraisage par enl\u00e8vement de copeaux et du fraisage conventionnel<\/h2>\n\n\n\n<p>En fonction de la position relative de la fraise et du sens d'avance de la pi\u00e8ce, le processus de fraisage est divis\u00e9 en deux types : le fraisage en avalant et le fraisage conventionnel. Dans le sens de l'avance de la pi\u00e8ce, lorsque la fraise se trouve sur le c\u00f4t\u00e9 gauche de la pi\u00e8ce, on parle de fraisage en avalant ou de fraisage en amont. Lorsque la fraise se trouve sur le c\u00f4t\u00e9 droit de la pi\u00e8ce, on parle de fraisage conventionnel ou de fraisage vers le bas.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1000\" height=\"700\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Up-milling-and-down-milling-climb-milling-and-conventional-milling.webp\" alt=\"Fraisage en amont et fraisage en aval Fraisage en aval et fraisage conventionnel\" class=\"wp-image-20122\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Up-milling-and-down-milling-climb-milling-and-conventional-milling.webp 1000w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Up-milling-and-down-milling-climb-milling-and-conventional-milling-300x210.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Up-milling-and-down-milling-climb-milling-and-conventional-milling-768x538.webp 768w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Up-milling-and-down-milling-climb-milling-and-conventional-milling-18x12.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p><strong>Fraisage de l'escalade<\/strong>: Au d\u00e9but, l'\u00e9paisseur des copeaux est maximale et diminue au fur et \u00e0 mesure que la coupe progresse. Il en r\u00e9sulte une d\u00e9formation minimale des copeaux et une force de coupe dirig\u00e9e vers la pi\u00e8ce.<\/p>\n\n\n\n<p><strong>Fraisage conventionnel<\/strong>: Au d\u00e9part, l'\u00e9paisseur du copeau est nulle, et elle augmente jusqu'\u00e0 son maximum en fin de coupe. Ce processus comporte un effet de polissage, l'effort de coupe ayant tendance \u00e0 soulever la pi\u00e8ce (ayant tendance \u00e0 soulever la pi\u00e8ce).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-analysis-of-up-milling-and-down-milling-processes-in-cnc-machining\">Analyse des processus de fraisage en amont et en aval dans l'usinage CNC<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-characteristics-of-climb-milling\">1. Caract\u00e9ristiques du fraisage de mont\u00e9e<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-advantages-of-climb-milling\">Avantages de l'usinage par enl\u00e8vement de copeaux :<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>L'\u00e9paisseur des copeaux varie du maximum \u00e0 z\u00e9ro, ce qui \u00e9vite le glissement de l'outil et prolonge sa dur\u00e9e de vie.<\/li>\n\n\n\n<li>Permet d'obtenir une meilleure finition de la surface.<\/li>\n\n\n\n<li>La force de fraisage verticale est toujours pouss\u00e9e vers la table de travail, ce qui am\u00e9liore la fiabilit\u00e9 du positionnement et du serrage de la pi\u00e8ce.<\/li>\n\n\n\n<li>R\u00e9duction de la consommation d'\u00e9nergie pendant l'usinage.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-disadvantages-of-climb-milling\">Inconv\u00e9nients de l'usinage par enl\u00e8vement de copeaux :<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ne convient pas pour le fraisage de pi\u00e8ces \u00e0 surface dure.<\/li>\n\n\n\n<li>S'il y a un jeu entre la vis d'entra\u00eenement et l'\u00e9crou, la vis d'entra\u00eenement peut vibrer pendant l'usinage.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-characteristics-of-conventional-milling\">2. Caract\u00e9ristiques du fraisage conventionnel<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-disadvantages-of-conventional-milling\">Inconv\u00e9nients du fraisage conventionnel :<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>L'\u00e9paisseur du copeau varie de z\u00e9ro \u00e0 un maximum, ce qui fait que l'outil glisse sur la surface de la pi\u00e8ce avant de couper dans le m\u00e9tal. Ce ph\u00e9nom\u00e8ne g\u00e9n\u00e8re une friction et une chaleur \u00e9lev\u00e9es, ce qui peut entra\u00eener la formation d'une couche durcie, r\u00e9duire la durabilit\u00e9 de l'outil et affecter la qualit\u00e9 de la surface.<\/li>\n\n\n\n<li>La force verticale de fraisage vers le haut tend \u00e0 soulever et \u00e0 d\u00e9stabiliser la pi\u00e8ce.<\/li>\n\n\n\n<li>Consommation d'\u00e9nergie plus \u00e9lev\u00e9e.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-advantages-of-conventional-milling\">Avantages du fraisage conventionnel :<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Convient pour le fraisage de pi\u00e8ces \u00e0 surface dure.<\/li>\n\n\n\n<li>Pas de vibration dans le m\u00e9canisme d'alimentation de la table de travail malgr\u00e9 la pr\u00e9sence d'un jeu.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-stress-analysis-of-tools-in-climb-and-conventional-milling\">3. Analyse des contraintes subies par les outils dans le cadre du fraisage par grimpage et du fraisage conventionnel<\/h3>\n\n\n\n<p>Dans le cas du fraisage en avalant, la force exerc\u00e9e par la pi\u00e8ce sur l'outil est telle qu'elle pousse l'outil vers la pi\u00e8ce. Dans le cas du fraisage conventionnel, la force tend \u00e0 soulever l'outil pour l'\u00e9loigner de la pi\u00e8ce.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"1000\" height=\"400\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Analysis-of-Tool-Forces-During-Milling.webp\" alt=\"Analyse des forces exerc\u00e9es par l&#039;outil lors du fraisage\" class=\"wp-image-20123\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Analysis-of-Tool-Forces-During-Milling.webp 1000w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Analysis-of-Tool-Forces-During-Milling-300x120.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Analysis-of-Tool-Forces-During-Milling-768x307.webp 768w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Analysis-of-Tool-Forces-During-Milling-18x7.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><figcaption class=\"wp-element-caption\">Analyse des forces exerc\u00e9es par l'outil lors du fraisage<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Analyse de s\u00e9lection du fraisage par mont\u00e9e et du fraisage conventionnel dans l'usinage CNC<\/h2>\n\n\n\n<p>Sur les machines CNC \u00e9quip\u00e9es de vis \u00e0 billes, le jeu peut \u00eatre compl\u00e8tement \u00e9limin\u00e9 gr\u00e2ce \u00e0 la pr\u00e9charge. Sur les machines CNC \u00e9quip\u00e9es de m\u00e9canismes de fraisage en avalant, le fraisage en avalant est pr\u00e9f\u00e9r\u00e9 en raison de la grande durabilit\u00e9 de l'outil, de la bonne qualit\u00e9 de la surface et de la faible consommation d'\u00e9nergie. Cependant, certaines conditions de coupe particuli\u00e8res peuvent n\u00e9cessiter un fraisage conventionnel. Par cons\u00e9quent, une analyse de corr\u00e9lation doit \u00eatre effectu\u00e9e avant de choisir entre les m\u00e9thodes de fraisage en avalanche et les m\u00e9thodes de fraisage conventionnelles.<\/p>\n\n\n\n<p>Sur les fraiseuses conventionnelles, en raison du jeu lat\u00e9ral dans l'assemblage de la vis-m\u00e8re et de l'\u00e9crou, le fraisage conventionnel est g\u00e9n\u00e9ralement utilis\u00e9 pour emp\u00eacher le d\u00e9placement de la table de travail et assurer des op\u00e9rations de fraisage en douceur. Cependant, pour les alliages Al-Mg n\u00e9cessitant de faibles quantit\u00e9s de coupe et une qualit\u00e9 de surface \u00e9lev\u00e9e, le fraisage en avalant peut \u00eatre utilis\u00e9.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-choice-of-milling-method-in-rough-machining\">Choix de la m\u00e9thode de fraisage dans l'usinage d'\u00e9bauche<\/h3>\n\n\n\n<p>La surface ext\u00e9rieure de l'\u00e9bauche est g\u00e9n\u00e9ralement plus dure et plus fragile que le mat\u00e9riau de base, en particulier pour les \u00e9bauches obtenues par oxycoupage. Avec des vitesses d'outil \u00e9lev\u00e9es (g\u00e9n\u00e9ralement sup\u00e9rieures \u00e0 2000 tr\/min) dans les centres d'usinage, l'utilisation du fraisage conventionnel pour l'usinage d'\u00e9bauche peut amener l'ar\u00eate de coupe \u00e0 quitter brusquement la pi\u00e8ce, brisant les copeaux de mani\u00e8re abrupte et transf\u00e9rant les vibrations r\u00e9sultantes \u00e0 l'ar\u00eate de coupe. Cela peut facilement provoquer l'\u00e9caillage ou la rupture de l'ar\u00eate de coupe fragile dans les centres d'usinage. C'est pourquoi le fraisage en avalant convient \u00e0 l'usinage d'\u00e9bauche dans les centres d'usinage. Les outils d'\u00e9bauche sp\u00e9cialis\u00e9s pour les fraiseuses conventionnelles sont plus r\u00e9sistants et fonctionnent \u00e0 des vitesses inf\u00e9rieures, ce qui ralentit la s\u00e9paration des copeaux et les rend aptes \u00e0 l'usinage d'\u00e9bauche conventionnel.<\/p>\n\n\n\n<p>Lors de l'usinage d'\u00e9bauche, en raison de la profondeur et de la largeur de coupe importantes, la vitesse relative entre la pi\u00e8ce et l'outil augmente dans le cas du fraisage conventionnel, car le sens de coupe s'oppose au sens d'avance, ce qui accro\u00eet la charge sur la broche et les moteurs de guidage, provoquant ainsi une augmentation des vibrations. Lorsque cette charge atteint un certain niveau, elle peut d\u00e9clencher des alarmes et l'arr\u00eat de la machine. Dans les m\u00eames conditions, le fraisage conventionnel consomme 10% \u00e0 20% de plus que le fraisage en avalanche. Par cons\u00e9quent, le fraisage en avalanche convient \u00e0 l'usinage d'\u00e9bauche dans les centres d'usinage, tandis que le fraisage conventionnel convient \u00e0 l'usinage d'\u00e9bauche sur les fraiseuses conventionnelles.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Analyse de cas de l'usinage CNC<\/h2>\n\n\n\n<p>Comme le montre l'image ci-dessous, il s'agit d'un processus d'usinage dans lequel l'\u00e9bauche est carr\u00e9e et la t\u00e2che consiste \u00e0 usiner le contour solide \u00e0 l'aide d'une fraiseuse CNC. D'apr\u00e8s l'analyse pr\u00e9c\u00e9dente, le fraisage en avalanche est pr\u00e9f\u00e9rable dans l'usinage CNC. Pour cette pi\u00e8ce, si le fraisage en avalant est utilis\u00e9, la trajectoire de l'outil serait D \u2192 C \u2192 B \u2192 A. Cependant, dans la production r\u00e9elle, la \"collision d'outils\" se produit souvent. Les raisons de ce ph\u00e9nom\u00e8ne ont \u00e9t\u00e9 analys\u00e9es.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"1000\" height=\"579\" src=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Selection-Analysis-of-Climb-Milling-and-Conventional-Milling-Case.webp\" alt=\"Analyse de s\u00e9lection des cas de fraisage de mont\u00e9e et de fraisage conventionnel\" class=\"wp-image-20125\" srcset=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Selection-Analysis-of-Climb-Milling-and-Conventional-Milling-Case.webp 1000w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Selection-Analysis-of-Climb-Milling-and-Conventional-Milling-Case-300x174.webp 300w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Selection-Analysis-of-Climb-Milling-and-Conventional-Milling-Case-768x445.webp 768w, https:\/\/firstmold.com\/wp-content\/uploads\/2024\/05\/Selection-Analysis-of-Climb-Milling-and-Conventional-Milling-Case-18x10.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p>1. Lorsque l'outil se d\u00e9place du point D \u00e0 C et le long de l'arc, l'outil progresse de D \u00e0 C. Pendant l'usinage, l'avance de l'outil augmente progressivement \u00e0 partir de z\u00e9ro jusqu'\u00e0 ce que toute la p\u00e9riph\u00e9rie de l'outil soit engag\u00e9e.<\/p>\n\n\n\n<p>2. Dans le cas o\u00f9 toute la p\u00e9riph\u00e9rie de l'outil est engag\u00e9e, cette partie est un fraisage en avalant, tandis que cette partie est un fraisage conventionnel.<\/p>\n\n\n\n<p>Pour la partie de l'\u00e9bauche \u00e0 d\u00e9couper (repr\u00e9sent\u00e9e par E), on proc\u00e8de \u00e0 un fraisage conventionnel. Lors du fraisage conventionnel, selon l'analyse pr\u00e9c\u00e9dente, l'outil a tendance \u00e0 s'approcher de la pi\u00e8ce. De m\u00eame, la partie de l'\u00e9bauche \u00e0 d\u00e9couper (repr\u00e9sent\u00e9e par E) a \u00e9galement tendance \u00e0 s'approcher de l'outil en fonction des caract\u00e9ristiques de la force et de la force de r\u00e9action.<\/p>\n\n\n\n<p>3. Lorsque l'outil poursuit l'usinage et que la pi\u00e8ce E est sur le point d'\u00eatre coup\u00e9e, \u00e9tant donn\u00e9 que E n'est pas soutenu et a tendance \u00e0 s'approcher de l'outil, au moment o\u00f9 E est coup\u00e9, E s'approche \u00e9troitement de l'outil, ce qui provoque une collision de l'outil.<\/p>\n\n\n\n<p>Sur la base de l'analyse globale ci-dessus, ce processus ne devrait pas donner la priorit\u00e9 au fraisage en avalanche. Au lieu de cela, le fraisage conventionnel doit \u00eatre utilis\u00e9 en premier, en laissant une marge pour l'usinage (A \u2192 B \u2192 C \u2192 D), suivi par le fraisage en avalant (D \u2192 C \u2192 B \u2192 A) pour garantir l'absence d'usure de l'outil pendant l'usinage et maintenir la qualit\u00e9 de la surface.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conclusion\">Conclusion<\/h2>\n\n\n\n<p>Le d\u00e9coupage des m\u00e9taux est un processus complexe impliquant des interactions complexes entre <a href=\"https:\/\/firstmold.com\/fr\/tips\/types-of-cnc-tools\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>outils de coupe<\/strong><\/a> et les mat\u00e9riaux de la pi\u00e8ce. Facteurs tels que les param\u00e8tres de coupe, les mat\u00e9riaux des outils, les angles g\u00e9om\u00e9triques, <a href=\"https:\/\/firstmold.com\/fr\/guides\/jigs-and-fixtures\/\"><strong>installations<\/strong><\/a>et les fluides de coupe influencent tous le processus de coupe.<\/p>\n\n\n\n<p>Dans des processus d'usinage CNC sp\u00e9cifiques, diff\u00e9rentes m\u00e9thodes de fraisage peuvent donner des r\u00e9sultats diff\u00e9rents. La compr\u00e9hension des caract\u00e9ristiques du fraisage en avalanche et du fraisage conventionnel est cruciale pour l'usinage et la programmation CNC.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u00c9tudier les diff\u00e9rences entre le fraisage en avalanche et le fraisage conventionnel, et leur s\u00e9lection appropri\u00e9e au cours du processus d'usinage.<\/p>","protected":false},"author":5,"featured_media":20126,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[47],"tags":[52],"class_list":["post-20120","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guides","tag-cnc-machining"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.3 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Climb Milling and Conventional 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