{"id":24140,"date":"2025-02-13T12:57:46","date_gmt":"2025-02-13T11:57:46","guid":{"rendered":"https:\/\/xometry.pro\/articles\/cnc-machining-surface-roughness\/"},"modified":"2025-03-05T12:20:44","modified_gmt":"2025-03-05T11:20:44","slug":"usinage-cnc-rugosite-surface","status":"publish","type":"articles","link":"https:\/\/xometry.pro\/fr\/articles\/usinage-cnc-rugosite-surface\/","title":{"rendered":"Rugosit\u00e9 de surface en usinage CNC\u00a0: principaux indicateurs et diff\u00e9rents niveaux de rugosit\u00e9"},"content":{"rendered":"<div role=\"navigation\" aria-label=\"Table des mati\u00e8res\" class=\"simpletoc wp-block-simpletoc-toc\"><h2 class=\"simpletoc-title\">Table des mati\u00e8res<\/h2>\n<ul class=\"simpletoc-list\">\n<li><a href=\"#h-ce-qu-est-la-rugosite-de-surface-pour-usinage-cnc\">Ce qu&rsquo;est la rugosit\u00e9 de surface pour usinage CNC<\/a>\n\n<\/li>\n<li><a href=\"#h-niveaux-de-rugosite-courants-pour-surface-d-usinage-cnc\">Niveaux de rugosit\u00e9 courants pour surface d&rsquo;usinage CNC<\/a>\n\n<\/li>\n<li><a href=\"#h-impact-des-operations-de-post-traitement-sur-la-rugosite-de-surface-des-pieces-usinees\">Impact des op\u00e9rations de post-traitement sur la rugosit\u00e9 de surface des pi\u00e8ces usin\u00e9es<\/a>\n\n<\/li>\n<li><a href=\"#h-comment-la-rugosite-d-une-surface-est-elle-mesuree-nbsp-nbsp\">Comment la rugosit\u00e9 d&rsquo;une surface est-elle mesur\u00e9e&nbsp;?&nbsp;<\/a>\n\n<\/li>\n<li><a href=\"#h-indicateurs-de-rugosite-de-surface-en-usinage-cnc\">Indicateurs de rugosit\u00e9 de surface en usinage CNC<\/a>\n\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<li><a href=\"#h-qualites-de-rugosite-de-surface\">Qualit\u00e9s de rugosit\u00e9 de surface<\/a>\n\n<\/li>\n<li><a href=\"#h-classes-de-rugosite-realisables-et-non-realisables-avec-l-usinage-cnc\">Classes de rugosit\u00e9 r\u00e9alisables et non r\u00e9alisables avec l&rsquo;usinage CNC<\/a>\n\n<\/li>\n<li><a href=\"#h-comment-selectionner-la-rugosite-de-surface-la-plus-adaptee-pour-l-usinage-cnc\">Comment s\u00e9lectionner la rugosit\u00e9 de surface la plus adapt\u00e9e pour l&rsquo;usinage CNC<\/a>\n\n<\/li>\n<li><a href=\"#h-commande-de-pieces-usinees-cnc-nbsp\">Commande de pi\u00e8ces usin\u00e9es CNC&nbsp;<\/a>\n\n<\/li>\n<li><a href=\"#h-outil-de-conversion-de-rugosite-ra-rz-n\">Outil de conversion de rugosit\u00e9 Ra \u2013 Rz \u2013 N<\/a>\n<\/li><\/ul><\/div>\n\n<h2 class=\"wp-block-heading\" id=\"h-ce-qu-est-la-rugosite-de-surface-pour-usinage-cnc\"><strong>Ce qu&rsquo;est la rugosit\u00e9 de surface pour usinage CNC<\/strong><\/h2>\n\n\n<p>La rugosit\u00e9 de surface en usinage CNC mesure les imperfections ou la texture de la surface d&rsquo;une pi\u00e8ce usin\u00e9e. Imaginez que ce sont les bosses et les rainures que vous verriez au microscope \u2014 ce sont tous les minuscules d\u00e9tails que vous ne pouvez pas voir \u00e0 l&rsquo;\u0153il nu. M\u00eame apr\u00e8s des proc\u00e9d\u00e9s tels que le microbillage, le polissage ou l&rsquo;application d&rsquo;autres finitions de surface, un certain degr\u00e9 de rugosit\u00e9 peut subsister. Ces irr\u00e9gularit\u00e9s de surface sont un r\u00e9sultat inh\u00e9rent de l&rsquo;usinage CNC, un processus de fabrication soustractive dans lequel de la mati\u00e8re est enlev\u00e9e des pi\u00e8ces \u00e0 l&rsquo;aide d&rsquo;outils de coupe. Les coupes laiss\u00e9es par ces outils forment des irr\u00e9gularit\u00e9s, souvent invisibles \u00e0 l&rsquo;\u0153il nu.<\/p>\n\n\n\n<p>La rugosit\u00e9 de surface joue un r\u00f4le essentiel dans l&rsquo;\u00e9valuation des performances des pi\u00e8ces usin\u00e9es CNC, car elle influence directement des param\u00e8tres cl\u00e9s tels que le coefficient de frottement, le niveau de bruit, l&rsquo;usure, la g\u00e9n\u00e9ration de chaleur et l&rsquo;adh\u00e9sivit\u00e9. Si vous vous \u00eates d\u00e9j\u00e0 demand\u00e9 pourquoi certains composants s&rsquo;assemblent parfaitement alors que d&rsquo;autres non, eh bien, tout d\u00e9pend de la tol\u00e9rance et de la rugosit\u00e9.&nbsp; Ces facteurs sont essentiels pour s\u00e9lectionner le niveau de rugosit\u00e9 de surface le plus appropri\u00e9 pour des applications sp\u00e9cifiques, ce qui en fait une consid\u00e9ration essentielle pour les ing\u00e9nieurs et les fabricants.&nbsp;<\/p>\n\n\n\n<p>Une surface rugueuse ne constitue pas toujours un inconv\u00e9nient. Tout ne consiste pas \u00e0 rendre les choses aussi lisses que possible. Pour certaines <a href=\"https:\/\/xometry.eu\/fr\/usinage-cnc\/\" target=\"_blank\" rel=\"noreferrer noopener\">pi\u00e8ces usin\u00e9es CNC<\/a>, des niveaux de rugosit\u00e9 sp\u00e9cifiques sont requis dans le cadre des directives de fabrication du produit. Par exemple, certaines pi\u00e8ces usin\u00e9es peuvent n\u00e9cessiter des surfaces plus rugueuses pour am\u00e9liorer l&rsquo;adh\u00e9rence ou leurs performances dans des conditions sp\u00e9cifiques. Les fabricants peuvent avoir besoin d&rsquo;affiner les irr\u00e9gularit\u00e9s de surface pour atteindre l&rsquo;objectif pr\u00e9vu de la pi\u00e8ce usin\u00e9e, soulignant l&rsquo;importance d&rsquo;\u00e9valuer et de sp\u00e9cifier soigneusement les niveaux de rugosit\u00e9 de surface dans le processus de production.<\/p>\n\n\n    <aside class=\"article-content-aside\">\r\n        <a href=\"https:\/\/xometry.pro\/fr\/articles\/usinage-cnc-finitions\/\" class=\"aside-image sidebar__aside-image\"><img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/CNC-machined-part-with-a-nickel-plating-surface-finish-previously-polished.webp\" alt=\"CNC machined part with a nickel plating surface finish, previously polished\"><\/a><a href=\"https:\/\/xometry.pro\/fr\/articles\/usinage-cnc-finitions\/\" class=\"aside-link\">Finitions de surface pour l\u2019usinage CNC<\/a>    <\/aside>\r\n    \n\n<h2 class=\"wp-block-heading\" id=\"h-niveaux-de-rugosite-courants-pour-surface-d-usinage-cnc\"><strong>Niveaux de rugosit\u00e9 courants pour surface d&rsquo;usinage CNC<\/strong><\/h2>\n\n\n<p>Analysons des applications concr\u00e8tes de cela. Le tableau ci-dessous pr\u00e9sente les niveaux de rugosit\u00e9 de surface courants pour l&rsquo;usinage CNC, leurs applications recommand\u00e9es et leur impact sur le temps et le co\u00fbt d&rsquo;usinage.<\/p>\n\n\n<div class=\"custom-table-block table-with-white-space\" id=\"table-id-544\" >\r\n\t<div class=\"search-input-wrapper\">\r\n\t\t<svg width=\"16\" height=\"16\" viewBox=\"0 0 16 16\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n\t\t\t<path d=\"M15.7812 13.833L12.6659 10.7177C12.5252 10.5771 12.3346 10.499 12.1347 10.499H11.6253C12.4877 9.39596 13.0002 8.00859 13.0002 6.49937C13.0002 2.90909 10.0911 0 6.50083 0C2.91056 0 0.00146484 2.90909 0.00146484 6.49937C0.00146484 10.0896 2.91056 12.9987 6.50083 12.9987C8.01006 12.9987 9.39742 12.4863 10.5004 11.6239V12.1332C10.5004 12.3332 10.5786 12.5238 10.7192 12.6644L13.8345 15.7797C14.1282 16.0734 14.6032 16.0734 14.8938 15.7797L15.778 14.8954C16.0718 14.6017 16.0718 14.1267 15.7812 13.833ZM6.50083 10.499C4.29167 10.499 2.50122 8.71165 2.50122 6.49937C2.50122 4.29021 4.28855 2.49976 6.50083 2.49976C8.70999 2.49976 10.5004 4.28708 10.5004 6.49937C10.5004 8.70852 8.71311 10.499 6.50083 10.499Z\" fill=\"#476175\"\/>\r\n\t\t<\/svg>\r\n\t\t<input type=\"search\" class=\"table-search-input\" id=\"table-search-544\" placeholder=\"Rechercher...\">\r\n\t<\/div>\t\r\n\t<div class=\"table-wrapper\">\r\n\t\t<table style=\"border-collapse: collapse; width: 100%; height: 120px;\">\n<tbody>\n<tr>\n<td style=\"width: 12.1134%;\"><b>Type de rugosit\u00e9 de surface<\/b><\/td>\n<td style=\"width: 39.8196%;\"><b>Applications recommand\u00e9es<\/b><\/td>\n<td style=\"width: 26.1598%;\"><b>Temps d&rsquo;usinage CNC<\/b><\/td>\n<td style=\"width: 21.6495%;\"><b>Impact sur le prix<\/b><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 12.1134%;\"><b>3,2 \u03bcm Ra<\/b><\/td>\n<td style=\"width: 39.8196%;\"><span style=\"font-weight: 400;\">Adapt\u00e9 aux pi\u00e8ces sujettes au stress, aux charges ou aux vibrations. <\/span><span style=\"font-family: inherit; font-size: inherit;\">Courant dans les supports, les couvercles de moteur automobile, les fixations g\u00e9n\u00e9rales d&rsquo;outillage et les ch\u00e2ssis de machines.<\/span><\/td>\n<td style=\"width: 26.1598%;\"><span style=\"font-weight: 400;\">Moins de temps est n\u00e9cessaire car il n&rsquo;y a pas de processus de fabrication suppl\u00e9mentaires.<\/span><\/td>\n<td style=\"width: 21.6495%;\"><span style=\"font-weight: 400;\">Finition de base pour les pi\u00e8ces\u00a0; pas de co\u00fbts suppl\u00e9mentaires<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 12.1134%;\"><b>1,6 \u03bcm Ra<\/b><\/td>\n<td style=\"width: 39.8196%;\"><span style=\"font-weight: 400;\">Id\u00e9al pour les surfaces \u00e0 mouvement lent avec des charges l\u00e9g\u00e8res, telles que les tiges de piston hydrauliques, les bo\u00eetes de vitesses lentes, les fixations de pr\u00e9cision et les bo\u00eetiers \u00e9lectroniques.<\/span><\/td>\n<td style=\"width: 26.1598%;\"><span style=\"font-weight: 400;\">Cela n\u00e9cessite des conditions contr\u00f4l\u00e9es, ce qui augmente le temps de production.<\/span><\/td>\n<td style=\"width: 21.6495%;\"><span style=\"font-weight: 400;\">Augmente les co\u00fbts d&rsquo;environ \u00b12,5 %.\u00a0<\/span><span style=\"font-weight: 400;\">Les pi\u00e8ces plus complexes auront des co\u00fbts plus \u00e9lev\u00e9s.<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 12.1134%;\"><b>0,8 \u03bcm Ra<\/b><\/td>\n<td style=\"width: 39.8196%;\"><span style=\"font-weight: 400;\">Id\u00e9al pour les applications \u00e0 fortes contraintes ou les surfaces avec mouvement occasionnel, telles que les composants de vannes hydrauliques et les bo\u00eetiers \u00e9lectroniques.\u00a0<\/span><\/td>\n<td style=\"width: 26.1598%;\"><span style=\"font-weight: 400;\">Produit dans des conditions hautement contr\u00f4l\u00e9es, ce qui augmente le temps de production.\u00a0<\/span><\/td>\n<td style=\"width: 21.6495%;\"><span style=\"font-weight: 400;\">Ajoute \u00b15% aux co\u00fbts de production.\u00a0<\/span><span style=\"font-weight: 400;\">Les pi\u00e8ces plus complexes auront des co\u00fbts plus \u00e9lev\u00e9s.<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 12.1134%;\"><b>0,4 \u03bcm Ra<\/b><\/td>\n<td style=\"width: 39.8196%;\"><span style=\"font-weight: 400;\">Recommand\u00e9 pour les composants \u00e0 haute vitesse ou \u00e0 fortes contraintes tels que les tiges de v\u00e9rin pneumatique, les composants optiques et les moules d&rsquo;injection de pr\u00e9cision.<\/span><\/td>\n<td style=\"width: 26.1598%;\"><span style=\"font-weight: 400;\">N\u00e9cessite un polissage et des processus avanc\u00e9s, prend le plus de temps.\u00a0<\/span><\/td>\n<td style=\"width: 21.6495%;\"><span style=\"font-weight: 400;\">Ajoute environ \u00b111-15% aux co\u00fbts de production. <\/span><span style=\"font-weight: 400;\">Les pi\u00e8ces plus complexes auront des co\u00fbts plus \u00e9lev\u00e9s.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\t<\/div>\r\n<\/div>\r\n<style>\r\n\t.custom-table-block table{\r\n\t\theight: initial!important;\r\n\t}\r\n\t.search-input-wrapper{\r\n\t\tposition: relative;\r\n\t\tmargin-bottom: 24px;\r\n\t}\r\n\t.search-input-wrapper svg{\r\n\t\tposition: absolute;\r\n\t\ttop:50%;\r\n\t\tleft:12px;\r\n\t\ttransform: translateY(-50%);\r\n\t}\r\n\t.table-search-input{\r\n\t\tpadding: 0 0 0 40px;\r\n\t\tborder:1px solid #C1CAD1;\r\n\t\theight: 44px;\r\n\t\twidth: 201px;\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t}\r\n\t.table-search-input::placeholder{\r\n\t\tcolor:#092C47;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\ttext-align: left;\r\n\t\twhite-space:nowrap;\r\n\t}\r\n\t\r\n\t.custom-table-block thead{\r\n\t\tmargin-bottom: 14px;\r\n\t}\r\n\r\n\t.custom-table-block tbody tr:nth-child(odd){\r\n\t\tbackground-color: #F6F9FF;\r\n\t}\r\n\r\n\t.custom-table-block tbody, .custom-table-block thead, .custom-table-block tr, .custom-table-block td, .custom-table-block th{\r\n\t\theight: initial!important;\r\n\t}\r\n\t\r\n\t.custom-table-block tbody td{\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tpadding: 7px;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 700;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tcolor:#092C47;\r\n\t\tposition: relative;\r\n\t}\r\n\t.custom-table-block thead th:after{\r\n\t\tcontent:\"\";\r\n\t\tdisplay: inline-block;\r\n\t\tbackground-image: url(\"data:image\/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http:\/\/www.w3.org\/2000\/svg'%3E%3Cpath d='M10.585 0.585938L6 5.17094L1.415 0.585938L0 2.00094L6 8.00094L12 2.00094L10.585 0.585938Z' fill='%23476175'\/%3E%3C\/svg%3E%0A\");\r\n\t\tmargin-left: 8px;\r\n\t\tbackground-position: center center;\r\n\t\tbackground-size: 12px 7.5px;\r\n\t\tbackground-repeat: no-repeat;\r\n\t\twidth: 24px;\r\n\t\theight: 12px;\r\n\t}\r\n\t.custom-table-block{\r\n\t\tmargin: 20px 0;\t\r\n\t}\r\n\t.custom-table-block .table-wrapper{\r\n\t\twidth: 100%;\r\n\t\toverflow-x: auto;\r\n\t}\r\n\t@media(max-width: 768px){\r\n\t\t\/* .custom-table-block tbody td{\r\n\t\t\twhite-space: nowrap;\r\n\t\t} *\/\r\n\t\t.custom-table-block .table-wrapper{\r\n\t\t\tmax-width: calc(100vw - 16px);\r\n\t\t}\r\n\t}\r\n<\/style>\r\n\n\n    <aside class=\"article-content-aside\">\r\n        <a href=\"https:\/\/xometry.pro\/fr\/topic\/finition-polie-miroir-pour-pieces-cnc-directives-pour-les-devis-et-les-dessins\/\" class=\"aside-image sidebar__aside-image\"><img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/11\/community-icon-1.svg\" alt=\"\"><\/a><a href=\"https:\/\/xometry.pro\/fr\/topic\/finition-polie-miroir-pour-pieces-cnc-directives-pour-les-devis-et-les-dessins\/\" class=\"aside-link\">Finition polie miroir pour pi\u00e8ces CNC: directives pour les devis et les dessins<\/a>    <\/aside>\r\n    \n\n\n<figure class=\"wp-block-image size-full is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"798\" height=\"746\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/06\/hlighted-material-table.jpg\" alt=\"\" class=\"wp-image-39256\" style=\"max-width:656px;height:auto\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/06\/hlighted-material-table.jpg 798w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/06\/hlighted-material-table-300x280.jpg 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/06\/hlighted-material-table-768x718.jpg 768w\" sizes=\"(max-width: 798px) 100vw, 798px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/06\/hlighted-material-table.jpg\" data-fancybox=\"gallery-24140\" data-caption=\"Exemples visuels de niveaux de rugosit\u00e9 de surface\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/06\/hlighted-material-table.jpg\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">Exemples visuels de niveaux de rugosit\u00e9 de surface<\/figcaption><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-impact-des-operations-de-post-traitement-sur-la-rugosite-de-surface-des-pieces-usinees\"><strong>Impact des op\u00e9rations de post-traitement sur la rugosit\u00e9 de surface des pi\u00e8ces usin\u00e9es<\/strong><\/h2>\n\n\n<p>Les techniques de post-traitement, telles que le microbillage, l&rsquo;\u00e9lectropolissage, l&rsquo;anodisation, le placage et le rev\u00eatement par poudre, peuvent affecter la rugosit\u00e9 de surface et les dimensions globales du composant.&nbsp; La technique de post-traitement affecte aussi la finition de surface du composant fabriqu\u00e9. Pour une finition mate ou granuleuse, le microbillage est privil\u00e9gi\u00e9, et une finition lisse et brillante peut \u00eatre obtenue par lissage \u00e0 la vapeur ou polissage \u00e9lectrolytique. Choisir la bonne technique assure que les composants r\u00e9pondent aux normes de l&rsquo;industrie et aux contraintes de performance.<\/p>\n\n\n    <aside class=\"article-content-aside\">\r\n        <a href=\"https:\/\/xometry.pro\/fr\/articles\/impact-post-traitement-sur-precision-dimensionnelle\/\" class=\"aside-image sidebar__aside-image\"><img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/07\/as-printed-part-accuracy-scaled.jpg\" alt=\"A person using a digital caliper to measure the thickness of a black 3D-printed part, with the caliper\"><\/a><a href=\"https:\/\/xometry.pro\/fr\/articles\/impact-post-traitement-sur-precision-dimensionnelle\/\" class=\"aside-link\">Impact du post-traitement sur la pr\u00e9cision dimensionnelle des pi\u00e8ces<\/a>    <\/aside>\r\n    \n\n<h2 class=\"wp-block-heading\" id=\"h-comment-la-rugosite-d-une-surface-est-elle-mesuree-nbsp-nbsp\"><strong>Comment la rugosit\u00e9 d&rsquo;une surface est-elle mesur\u00e9e ? <\/strong><\/h2>\n\n\n<p>Chaque pi\u00e8ce usin\u00e9e CNC quittant la cha\u00eene de production se voit attribuer une valeur Ra sp\u00e9cifique ainsi que d&rsquo;autres indicateurs. Ceux-ci sont mesur\u00e9s avec des m\u00e9thodes avanc\u00e9es qui ne laissent pas de place \u00e0 l&rsquo;erreur. Voici certaines des techniques les plus couramment utilis\u00e9es&nbsp;:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Profilom\u00e8tres \u00e0 contact&nbsp;:<\/strong> utilisent un stylet en diamant qui glisse sur la surface de la pi\u00e8ce usin\u00e9e, et ses d\u00e9viations sont enregistr\u00e9es.&nbsp;<\/li>\n\n\n\n<li><strong>Profilom\u00e8tres sans contact&nbsp;:<\/strong> utilisent diff\u00e9rentes techniques pour mesurer la rugosit\u00e9 de surface sans contact physique avec le composant usin\u00e9. Parmi les techniques courantes on trouve l&rsquo;holographie num\u00e9rique, la triangulation laser, la microscopie confocale et la profilom\u00e9trie optique.<\/li>\n\n\n\n<li><strong>Microscopie \u00e0 force atomique (AFM)&nbsp;:<\/strong> Une technologie tr\u00e8s avanc\u00e9e qui est id\u00e9ale pour mesurer la rugosit\u00e9 de surface des surfaces lisses. Elle utilise des sondes pour balayer avec pr\u00e9cision les surfaces des pi\u00e8ces usin\u00e9es et offre une pr\u00e9cision nanom\u00e9trique.<\/li>\n\n\n\n<li><strong>Num\u00e9risation 3D :<\/strong> Cr\u00e9e des cartes de topographie de surface, et est l&rsquo;une des techniques de mesure de rugosit\u00e9 de surface les plus avanc\u00e9es.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"903\" height=\"1024\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/surface-roughness-conversion-903x1024.png\" alt=\"Illustration of surface roughness calculation\" class=\"wp-image-71550\" style=\"max-width:529px;height:auto\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/surface-roughness-conversion-903x1024.png 903w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/surface-roughness-conversion-265x300.png 265w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/surface-roughness-conversion-768x871.png 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/surface-roughness-conversion-1354x1536.png 1354w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/surface-roughness-conversion-1806x2048.png 1806w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/surface-roughness-conversion.png 1894w\" sizes=\"(max-width: 903px) 100vw, 903px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/surface-roughness-conversion.png\" data-fancybox=\"gallery-24140\" data-caption=\"Illustration du calcul de la rugosit\u00e9 de surface\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/surface-roughness-conversion.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">Illustration du calcul de la rugosit\u00e9 de surface<\/figcaption><\/figure>\n\n\n    <aside class=\"article-content-aside\">\r\n        <a href=\"https:\/\/xometry.pro\/fr\/topic\/des-experiences-avec-lusinage-cnc-en-plastique-pom\/\" class=\"aside-image sidebar__aside-image\"><img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/11\/community-icon-1.svg\" alt=\"\"><\/a><a href=\"https:\/\/xometry.pro\/fr\/topic\/des-experiences-avec-lusinage-cnc-en-plastique-pom\/\" class=\"aside-link\">Des exp\u00e9riences avec l&rsquo;usinage CNC en plastique (POM) ?<\/a>    <\/aside>\r\n    \n\n<h2 class=\"wp-block-heading\" id=\"h-indicateurs-de-rugosite-de-surface-en-usinage-cnc\"><strong>Indicateurs de rugosit\u00e9 de surface en usinage CNC<\/strong><\/h2>\n\n\n<p>Les indicateurs de rugosit\u00e9 aident \u00e0 d\u00e9terminer si des pi\u00e8ces conviennent \u00e0 des applications sp\u00e9cifiques en fonction de leurs contraintes fonctionnelles et esth\u00e9tiques. Ci-dessous, un aper\u00e7u des principaux indicateurs de rugosit\u00e9 de surface.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-ra-rugosite-moyenne\"><strong>Ra (Rugosit\u00e9 moyenne)<\/strong><\/h3>\n\n\n<p><strong>Ra<\/strong> est calcul\u00e9 comme la moyenne arithm\u00e9tique des \u00e9carts absolus du profil de surface par rapport \u00e0 la ligne moyenne sur la longueur d&rsquo;\u00e9valuation. Elle calcule essentiellement la moyenne des diff\u00e9rences de hauteur entre les pics et les creux, sans tenir compte de leur signe, pour fournir une valeur de rugosit\u00e9 unique.<\/p>\n\n\n    <aside class=\"article-content-aside\">\r\n        <div class=\"aside-title\">Outil de conversion de rugosit\u00e9 Ra \u2013 Rz \u2013 N <\/div><div class=\"aside-text\"><p>Vous avez des valeurs de rugosit\u00e9 Ra, Rz ou N et vous avez besoin d\u2019obtenir leurs \u00e9quivalents dans d\u2019autres unit\u00e9s ? Utilisez notre outil gratuit pour le faire.<\/p>\n<\/div><a href=\"https:\/\/xometry.pro\/fr\/outils\/convertisseur-rugosite-de-surface\/\" class=\"aside-image sidebar__aside-image\"><img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/06\/xometry-ra-rz-conversion-tool-1.png\" alt=\"\"><\/a><a href=\"https:\/\/xometry.pro\/fr\/outils\/convertisseur-rugosite-de-surface\/\" class=\"aside-link\">Essayez-le maintenant<\/a>    <\/aside>\r\n    \n\n\n<figure class=\"wp-block-image size-large is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"370\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/ra-chart-1024x370.png\" alt=\"Ra roughness chart\" class=\"wp-image-37061\" style=\"max-width:602px;height:auto\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/ra-chart-1024x370.png 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/ra-chart-300x108.png 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/ra-chart-768x277.png 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/ra-chart.png 1108w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/ra-chart.png\" data-fancybox=\"gallery-24140\" data-caption=\"Tableau de rugosit\u00e9 Ra\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/ra-chart.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">Tableau de rugosit\u00e9 Ra<\/figcaption><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>Rp (Hauteur maximale du pic de profil)&nbsp;: La hauteur du plus haut pic par rapport \u00e0 la ligne moyenne.&nbsp;<\/em><\/li>\n\n\n\n<li><em>Rv (Profondeur maximale du creux de profil) : La profondeur du creux le plus profond par rapport \u00e0 la ligne moyenne.<\/em><\/li>\n\n\n\n<li><em>L&nbsp;: Longueur d&rsquo;\u00e9valuation<\/em><\/li>\n<\/ul>\n\n\n\n<p><strong>Importance : <\/strong>Ra est le param\u00e8tre le plus largement utilis\u00e9 car il fournit une indication g\u00e9n\u00e9rale de la texture globale de la surface sans \u00eatre excessivement influenc\u00e9 par les pics ou les creux extr\u00eames.<\/p>\n\n\n\n<p><strong>Applications&nbsp;: <\/strong>Convient aux pi\u00e8ces \u00e0 usage g\u00e9n\u00e9ral o\u00f9 une douceur mod\u00e9r\u00e9e est acceptable.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-rz-hauteur-maximale-moyenne\"><strong>Rz (Hauteur maximale moyenne)<\/strong><\/h3>\n\n\n<p><strong>Rz<\/strong> est la moyenne des profondeurs maximales dans cinq longueurs d&rsquo;\u00e9chantillonnage \u00e9gales&nbsp;:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"380\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/rz-chart-1024x380.png\" alt=\"Rz roughness chart\" class=\"wp-image-37085\" style=\"max-width:646px;height:auto\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/rz-chart-1024x380.png 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/rz-chart-300x111.png 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/rz-chart-768x285.png 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/rz-chart.png 1079w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/rz-chart.png\" data-fancybox=\"gallery-24140\" data-caption=\"Tableau de rugosit\u00e9 Rz\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/rz-chart.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">Tableau de rugosit\u00e9 Rz<\/figcaption><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>Du pic le plus haut au creux le plus bas<\/em><\/li>\n\n\n\n<li><em>Du deuxi\u00e8me plus haut pic au deuxi\u00e8me plus bas creux<\/em><\/li>\n\n\n\n<li><em>etc. jusqu&rsquo;\u00e0 la cinqui\u00e8me plus grande distance<\/em><\/li>\n<\/ul>\n\n\n\n<p><strong>Importance&nbsp;:<\/strong> Offre une repr\u00e9sentation plus d\u00e9taill\u00e9e de la texture de surface en se concentrant sur les variations extr\u00eames.<\/p>\n\n\n\n<p><strong>Applications&nbsp;:<\/strong> Critique pour les surfaces d&rsquo;\u00e9tanch\u00e9it\u00e9 ou les applications o\u00f9 les pics et les creux ont un impact sur les performances.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-rt-rugosite-totale\"><strong>Rt (Rugosit\u00e9 totale)<\/strong><\/h3>\n\n\n<p><strong>Rt<\/strong> est la distance verticale totale entre le plus haut pic et le plus bas creux sur la longueur d&rsquo;\u00e9valuation.<\/p>\n\n\n\n<p><strong>Importance&nbsp;:<\/strong> Utile pour le contr\u00f4le qualit\u00e9 global afin de s&rsquo;assurer qu&rsquo;il n&rsquo;existe pas d&rsquo;\u00e9carts extr\u00eames.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-rugosite-quadratique-moyenne-rms\"><strong>Rugosit\u00e9 quadratique moyenne (RMS)<\/strong><\/h3>\n\n\n<p>La <strong>RMS<\/strong> est la moyenne quadratique des \u00e9carts de hauteur par rapport \u00e0 la ligne moyenne.<\/p>\n\n\n\n<p><strong>Importance&nbsp;:<\/strong> Accorde plus de poids aux \u00e9carts plus importants, ce qui la rend id\u00e9ale pour l&rsquo;ing\u00e9nierie de pr\u00e9cision et les applications optiques.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-comparaison-des-applications-des-indicateurs\"><strong>Comparaison des applications des indicateurs<\/strong><\/h3>\n\n<div class=\"custom-table-block table-with-white-space\" id=\"table-id-453\" >\r\n\t<div class=\"search-input-wrapper\">\r\n\t\t<svg width=\"16\" height=\"16\" viewBox=\"0 0 16 16\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n\t\t\t<path d=\"M15.7812 13.833L12.6659 10.7177C12.5252 10.5771 12.3346 10.499 12.1347 10.499H11.6253C12.4877 9.39596 13.0002 8.00859 13.0002 6.49937C13.0002 2.90909 10.0911 0 6.50083 0C2.91056 0 0.00146484 2.90909 0.00146484 6.49937C0.00146484 10.0896 2.91056 12.9987 6.50083 12.9987C8.01006 12.9987 9.39742 12.4863 10.5004 11.6239V12.1332C10.5004 12.3332 10.5786 12.5238 10.7192 12.6644L13.8345 15.7797C14.1282 16.0734 14.6032 16.0734 14.8938 15.7797L15.778 14.8954C16.0718 14.6017 16.0718 14.1267 15.7812 13.833ZM6.50083 10.499C4.29167 10.499 2.50122 8.71165 2.50122 6.49937C2.50122 4.29021 4.28855 2.49976 6.50083 2.49976C8.70999 2.49976 10.5004 4.28708 10.5004 6.49937C10.5004 8.70852 8.71311 10.499 6.50083 10.499Z\" fill=\"#476175\"\/>\r\n\t\t<\/svg>\r\n\t\t<input type=\"search\" class=\"table-search-input\" id=\"table-search-453\" placeholder=\"Rechercher...\">\r\n\t<\/div>\t\r\n\t<div class=\"table-wrapper\">\r\n\t\t<table style=\"border-collapse: collapse; width: 100%;\">\n<tbody>\n<tr>\n<td style=\"width: 11.5979%;\"><b>Indicateur<\/b><\/td>\n<td style=\"width: 21.2629%;\"><b>Fr\u00e9quence d&rsquo;utilisation<\/b><\/td>\n<td style=\"width: 27.0619%;\"><b>Point central<\/b><\/td>\n<td style=\"width: 15.2062%;\"><b>Sensibilit\u00e9 aux valeurs aberrantes<\/b><\/td>\n<td style=\"width: 24.7423%;\"><b>Exemple de cas<\/b><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 11.5979%;\"><b>Ra<\/b><\/td>\n<td style=\"width: 21.2629%;\"><b>Le plus couramment utilis\u00e9 dans le monde<\/b><\/td>\n<td style=\"width: 27.0619%;\"><span style=\"font-weight: 400;\">\u00c9cart moyen des hauteurs de surface par rapport \u00e0 la ligne moyenne.<\/span><\/td>\n<td style=\"width: 15.2062%;\"><span style=\"font-weight: 400;\">Faible<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">Applications g\u00e9n\u00e9rales ; largement utilis\u00e9e pour les proc\u00e9d\u00e9s d&rsquo;usinage, de fonderie et de rectification.<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 11.5979%;\"><b>Rz<\/b><\/td>\n<td style=\"width: 21.2629%;\"><b>Le plus couramment utilis\u00e9 apr\u00e8s Ra<\/b><\/td>\n<td style=\"width: 27.0619%;\"><span style=\"font-weight: 400;\">Moyenne des profondeurs maximales de rugosit\u00e9 de surface sur les longueurs d&rsquo;\u00e9chantillonnage<\/span><\/td>\n<td style=\"width: 15.2062%;\"><span style=\"font-weight: 400;\">Mod\u00e9r\u00e9<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">Interfaces critiques telles que les surfaces d&rsquo;\u00e9tanch\u00e9it\u00e9, les pi\u00e8ces porteuses et les composants sujets \u00e0 l&rsquo;usure.<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 11.5979%;\"><b>RMS<\/b><\/td>\n<td style=\"width: 21.2629%;\"><span style=\"font-weight: 400;\">Moins courant mais utilis\u00e9 pour les applications n\u00e9cessitant de la pr\u00e9cision<\/span><\/td>\n<td style=\"width: 27.0619%;\"><span style=\"font-weight: 400;\">Moyenne quadratique des \u00e9carts de hauteur par rapport \u00e0 la ligne moyenne.<\/span><\/td>\n<td style=\"width: 15.2062%;\"><span style=\"font-weight: 400;\">Mod\u00e9r\u00e9 \u00e0 \u00e9lev\u00e9<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">Ing\u00e9nierie de pr\u00e9cision, optique et applications pour lesquelles des \u00e9carts plus importants doivent \u00eatre mis en \u00e9vidence.<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 11.5979%;\"><b>Rt<\/b><\/td>\n<td style=\"width: 21.2629%;\"><span style=\"font-weight: 400;\">Moins couramment utilis\u00e9<\/span><\/td>\n<td style=\"width: 27.0619%;\"><span style=\"font-weight: 400;\">Diff\u00e9rence totale de hauteur entre le point le plus haut et le point le plus bas pour la longueur d&rsquo;\u00e9valuation<\/span><\/td>\n<td style=\"width: 15.2062%;\"><span style=\"font-weight: 400;\">\u00c9lev\u00e9<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">D\u00e9tection des d\u00e9fauts de surface extr\u00eames\u00a0; utile pour le contr\u00f4le qualit\u00e9 dans les applications critiques.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\t<\/div>\r\n<\/div>\r\n<style>\r\n\t.custom-table-block table{\r\n\t\theight: initial!important;\r\n\t}\r\n\t.search-input-wrapper{\r\n\t\tposition: relative;\r\n\t\tmargin-bottom: 24px;\r\n\t}\r\n\t.search-input-wrapper svg{\r\n\t\tposition: absolute;\r\n\t\ttop:50%;\r\n\t\tleft:12px;\r\n\t\ttransform: translateY(-50%);\r\n\t}\r\n\t.table-search-input{\r\n\t\tpadding: 0 0 0 40px;\r\n\t\tborder:1px solid #C1CAD1;\r\n\t\theight: 44px;\r\n\t\twidth: 201px;\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t}\r\n\t.table-search-input::placeholder{\r\n\t\tcolor:#092C47;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\ttext-align: left;\r\n\t\twhite-space:nowrap;\r\n\t}\r\n\t\r\n\t.custom-table-block thead{\r\n\t\tmargin-bottom: 14px;\r\n\t}\r\n\r\n\t.custom-table-block tbody tr:nth-child(odd){\r\n\t\tbackground-color: #F6F9FF;\r\n\t}\r\n\r\n\t.custom-table-block tbody, .custom-table-block thead, .custom-table-block tr, .custom-table-block td, .custom-table-block th{\r\n\t\theight: initial!important;\r\n\t}\r\n\t\r\n\t.custom-table-block tbody td{\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tpadding: 7px;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 700;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tcolor:#092C47;\r\n\t\tposition: relative;\r\n\t}\r\n\t.custom-table-block thead th:after{\r\n\t\tcontent:\"\";\r\n\t\tdisplay: inline-block;\r\n\t\tbackground-image: url(\"data:image\/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http:\/\/www.w3.org\/2000\/svg'%3E%3Cpath d='M10.585 0.585938L6 5.17094L1.415 0.585938L0 2.00094L6 8.00094L12 2.00094L10.585 0.585938Z' fill='%23476175'\/%3E%3C\/svg%3E%0A\");\r\n\t\tmargin-left: 8px;\r\n\t\tbackground-position: center center;\r\n\t\tbackground-size: 12px 7.5px;\r\n\t\tbackground-repeat: no-repeat;\r\n\t\twidth: 24px;\r\n\t\theight: 12px;\r\n\t}\r\n\t.custom-table-block{\r\n\t\tmargin: 20px 0;\t\r\n\t}\r\n\t.custom-table-block .table-wrapper{\r\n\t\twidth: 100%;\r\n\t\toverflow-x: auto;\r\n\t}\r\n\t@media(max-width: 768px){\r\n\t\t\/* .custom-table-block tbody td{\r\n\t\t\twhite-space: nowrap;\r\n\t\t} *\/\r\n\t\t.custom-table-block .table-wrapper{\r\n\t\t\tmax-width: calc(100vw - 16px);\r\n\t\t}\r\n\t}\r\n<\/style>\r\n\n\n\n<p>\u00c9tant donn\u00e9 que Ra et Rz sont les indicateurs les plus couramment utilis\u00e9s, les sections suivantes de cet article examinent ces syst\u00e8mes de mesure.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"n-numeros-de-classes-de-rugosite-din-iso-1302\"><strong>N \u2013 Num\u00e9ros de classes de rugosit\u00e9 (DIN ISO 1302)<\/strong><\/h3>\n\n\n<p>A propos de <strong>Ra<\/strong>, il est important de mentionner la norme <strong>DIN ISO 1302<\/strong> et les <strong>num\u00e9ros de classes de rugosit\u00e9<\/strong><strong>N<\/strong>. Il s&rsquo;agit d&rsquo;un syst\u00e8me standardis\u00e9 utilis\u00e9 pour classer la rugosit\u00e9 de surface dans les domaines de l&rsquo;ing\u00e9nierie et de la fabrication. Ces qualit\u00e9s, allant de N1 (la plus fine) \u00e0 N12 (la plus rugueuse), correspondent \u00e0 des valeurs Ra maximales sp\u00e9cifiques et sont couramment utilis\u00e9s sur les dessins techniques pour sp\u00e9cifier les contraintes de finition de surface.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"connexion-entre-ra-rz-et-n\"><strong>Connexion entre Ra, Rz et N<\/strong><\/h3>\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ra \u2013 N&nbsp;: <\/strong>Comme mentionn\u00e9 ci-dessus, les valeurs de N1 \u00e0 N12 repr\u00e9sentent directement des valeurs Ra sp\u00e9cifiques.<\/li>\n\n\n\n<li><strong>Ra \u2013 Rz&nbsp;: Ils ne sont pas directement convertibles car ils mesurent des caract\u00e9ristiques de surface diff\u00e9rentes.<\/strong> Cependant&nbsp;:\n<ul class=\"wp-block-list\">\n<li>Une analyse statistique nous permet de d\u00e9finir une plage possible de valeurs Rz pour chaque valeur Ra.<\/li>\n\n\n\n<li>Pour toute valeur Ra donn\u00e9e, il y a une plage de valeurs potentielles de Rz, et vice versa.<\/li>\n\n\n\n<li>Au fur et \u00e0 mesure que la rugosit\u00e9 de surface augmente, la plage de valeurs de Rz devient moins pr\u00e9cise.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>Le graphique ci-dessous illustre cela&nbsp;:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Une surface avec un <strong>Ra de 3,2 \u00b5m<\/strong> peut avoir une <strong>rugosit\u00e9 Rz comprise entre 11,5 et 34,7 \u00b5m<\/strong>.<\/li>\n\n\n\n<li>Une surface avec un <strong>Ra de 50 \u00b5m<\/strong> peut avoir une <strong>rugosit\u00e9 Rz comprise entre 156,2 et 272,6 \u00b5m<\/strong>.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"618\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/ra-to-rz-chart-1024x618.png\" alt=\"Ra Rz roughness chart\" class=\"wp-image-37073\" style=\"max-width:652px;height:auto\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/ra-to-rz-chart-1024x618.png 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/ra-to-rz-chart-300x181.png 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/ra-to-rz-chart-768x463.png 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/ra-to-rz-chart-1536x927.png 1536w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/ra-to-rz-chart.png 1598w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/ra-to-rz-chart.png\" data-fancybox=\"gallery-24140\" data-caption=\"Tableau de rugosit\u00e9 Ra-Rz\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/ra-to-rz-chart.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">Tableau de rugosit\u00e9 Ra-Rz<\/figcaption><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-qualites-de-rugosite-de-surface\"><strong>Qualit\u00e9s de rugosit\u00e9 de surface<\/strong><\/h2>\n\n\n<p>Le tableau ci-dessous pr\u00e9sente les valeurs N1 \u00e0 N12, leurs valeurs Ra correspondantes et la plage statistique des valeurs Rz pour chaque Ra. Pour plus de commodit\u00e9, vous pouvez \u00e9galement utiliser notre <a href=\"https:\/\/xometry.pro\/fr\/outils\/convertisseur-rugosite-de-surface\/\">outil de conversion de rugosit\u00e9 de surface<\/a> en ligne.<\/p>\n\n\n<div class=\"custom-table-block table-with-white-space\" id=\"table-id-532\" >\r\n\t<div class=\"search-input-wrapper\">\r\n\t\t<svg width=\"16\" height=\"16\" viewBox=\"0 0 16 16\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n\t\t\t<path d=\"M15.7812 13.833L12.6659 10.7177C12.5252 10.5771 12.3346 10.499 12.1347 10.499H11.6253C12.4877 9.39596 13.0002 8.00859 13.0002 6.49937C13.0002 2.90909 10.0911 0 6.50083 0C2.91056 0 0.00146484 2.90909 0.00146484 6.49937C0.00146484 10.0896 2.91056 12.9987 6.50083 12.9987C8.01006 12.9987 9.39742 12.4863 10.5004 11.6239V12.1332C10.5004 12.3332 10.5786 12.5238 10.7192 12.6644L13.8345 15.7797C14.1282 16.0734 14.6032 16.0734 14.8938 15.7797L15.778 14.8954C16.0718 14.6017 16.0718 14.1267 15.7812 13.833ZM6.50083 10.499C4.29167 10.499 2.50122 8.71165 2.50122 6.49937C2.50122 4.29021 4.28855 2.49976 6.50083 2.49976C8.70999 2.49976 10.5004 4.28708 10.5004 6.49937C10.5004 8.70852 8.71311 10.499 6.50083 10.499Z\" fill=\"#476175\"\/>\r\n\t\t<\/svg>\r\n\t\t<input type=\"search\" class=\"table-search-input\" id=\"table-search-532\" placeholder=\"Rechercher...\">\r\n\t<\/div>\t\r\n\t<div class=\"table-wrapper\">\r\n\t\t<table style=\"border-collapse: collapse; width: 100%; height: 776px;\">\n<tbody>\n<tr style=\"height: 104px;\">\n<td style=\"width: 20%; height: 104px;\"><strong>Classe de rugosit\u00e9<\/strong><\/td>\n<td style=\"width: 14.9485%; height: 104px;\"><b>Ra (\u00b5m)<br \/>\nUnit\u00e9s m\u00e9triques<br \/>\n<\/b><\/td>\n<td style=\"width: 25.6443%; height: 104px;\"><b>Metrics Rz (\u00b5m)<br \/>\nUnit\u00e9s m\u00e9triques<br \/>\n<\/b><\/td>\n<td style=\"width: 14.5619%; height: 104px;\"><b>Ra (\u00b5in)<br \/>\nUnit\u00e9s imp\u00e9riales<br \/>\n<\/b><\/td>\n<td style=\"width: 24.7423%; height: 104px;\"><b>Rz(\u00b5in)<br \/>\nUnit\u00e9s imp\u00e9riales<br \/>\n<\/b><\/td>\n<\/tr>\n<tr style=\"height: 56px;\">\n<td style=\"width: 20%; height: 56px;\"><strong>N12<\/strong><\/td>\n<td style=\"width: 14.9485%;\"><span style=\"font-weight: 400;\">50<\/span><\/td>\n<td style=\"width: 25.6443%;\"><span style=\"font-weight: 400;\">156,245-272,644<\/span><\/td>\n<td style=\"width: 14.5619%;\"><span style=\"font-weight: 400;\">2000<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">6249,8-10905,7<\/span><\/td>\n<\/tr>\n<tr style=\"height: 56px;\">\n<td style=\"width: 20%; height: 56px;\"><strong>N11<\/strong><\/td>\n<td style=\"width: 14.9485%;\"><span style=\"font-weight: 400;\">25<\/span><\/td>\n<td style=\"width: 25.6443%;\"><span style=\"font-weight: 400;\">156,2-272,6<\/span><\/td>\n<td style=\"width: 14.5619%;\"><span style=\"font-weight: 400;\">1000<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">3235,1-6484,6<\/span><\/td>\n<\/tr>\n<tr style=\"height: 56px;\">\n<td style=\"width: 20%; height: 56px;\"><strong>N10<\/strong><\/td>\n<td style=\"width: 14.9485%;\"><span style=\"font-weight: 400;\">12,5<\/span><\/td>\n<td style=\"width: 25.6443%;\"><span style=\"font-weight: 400;\">80,9-162,1<\/span><\/td>\n<td style=\"width: 14.5619%;\"><span style=\"font-weight: 400;\">500<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">1674,6-3855,8<\/span><\/td>\n<\/tr>\n<tr style=\"height: 56px;\">\n<td style=\"width: 20%; height: 56px;\"><strong>N9<\/strong><\/td>\n<td style=\"width: 14.9485%;\"><span style=\"font-weight: 400;\">8,3<\/span><\/td>\n<td style=\"width: 25.6443%;\"><span style=\"font-weight: 400;\">21,8-57,7<\/span><\/td>\n<td style=\"width: 14.5619%;\"><span style=\"font-weight: 400;\">250<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">873,4-2306,4<\/span><\/td>\n<\/tr>\n<tr style=\"height: 56px;\">\n<td style=\"width: 20%; height: 56px;\"><strong>N8<\/strong><\/td>\n<td style=\"width: 14.9485%;\"><span style=\"font-weight: 400;\">3,2<\/span><\/td>\n<td style=\"width: 25.6443%;\"><span style=\"font-weight: 400;\">11,5-34,7<\/span><\/td>\n<td style=\"width: 14.5619%;\"><span style=\"font-weight: 400;\">125<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">458,9-1387,7<\/span><\/td>\n<\/tr>\n<tr style=\"height: 56px;\">\n<td style=\"width: 20%; height: 56px;\"><strong>N7<\/strong><\/td>\n<td style=\"width: 14.9485%;\"><span style=\"font-weight: 400;\">1,6<\/span><\/td>\n<td style=\"width: 25.6443%;\"><span style=\"font-weight: 400;\">5,9-20,6<\/span><\/td>\n<td style=\"width: 14.5619%;\"><span style=\"font-weight: 400;\">63<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">237,6-825,1<\/span><\/td>\n<\/tr>\n<tr style=\"height: 56px;\">\n<td style=\"width: 20%; height: 56px;\"><strong>N6<\/strong><\/td>\n<td style=\"width: 14.9485%;\"><span style=\"font-weight: 400;\">0,8<\/span><\/td>\n<td style=\"width: 25.6443%;\"><span style=\"font-weight: 400;\">3,1-12,3<\/span><\/td>\n<td style=\"width: 14.5619%;\"><span style=\"font-weight: 400;\">32<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">123,0-490,6<\/span><\/td>\n<\/tr>\n<tr style=\"height: 56px;\">\n<td style=\"width: 20%; height: 56px;\"><strong>N5<\/strong><\/td>\n<td style=\"width: 14.9485%;\"><span style=\"font-weight: 400;\">0,4<\/span><\/td>\n<td style=\"width: 25.6443%;\"><span style=\"font-weight: 400;\">1,6-7,3<\/span><\/td>\n<td style=\"width: 14.5619%;\"><span style=\"font-weight: 400;\">16<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">63,7-291,7<\/span><\/td>\n<\/tr>\n<tr style=\"height: 56px;\">\n<td style=\"width: 20%; height: 56px;\"><strong>N4<\/strong><\/td>\n<td style=\"width: 14.9485%;\"><span style=\"font-weight: 400;\">0,2<\/span><\/td>\n<td style=\"width: 25.6443%;\"><span style=\"font-weight: 400;\">0,8-4,3<\/span><\/td>\n<td style=\"width: 14.5619%;\"><span style=\"font-weight: 400;\">8<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">32,9-173,5<\/span><\/td>\n<\/tr>\n<tr style=\"height: 56px;\">\n<td style=\"width: 20%; height: 56px;\"><strong>N3<\/strong><\/td>\n<td style=\"width: 14.9485%;\"><span style=\"font-weight: 400;\">0,1<\/span><\/td>\n<td style=\"width: 25.6443%;\"><span style=\"font-weight: 400;\">0,4-2,6<\/span><\/td>\n<td style=\"width: 14.5619%;\"><span style=\"font-weight: 400;\">4<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">17,1-103,1<\/span><\/td>\n<\/tr>\n<tr style=\"height: 56px;\">\n<td style=\"width: 20%; height: 56px;\"><strong>N2<\/strong><\/td>\n<td style=\"width: 14.9485%;\"><span style=\"font-weight: 400;\">0,05<\/span><\/td>\n<td style=\"width: 25.6443%;\"><span style=\"font-weight: 400;\">0,2-1,5<\/span><\/td>\n<td style=\"width: 14.5619%;\"><span style=\"font-weight: 400;\">2<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">8,8-61,3<\/span><\/td>\n<\/tr>\n<tr style=\"height: 56px;\">\n<td style=\"width: 20%; height: 56px;\"><strong>N1<\/strong><\/td>\n<td style=\"width: 14.9485%;\"><span style=\"font-weight: 400;\">0,025<\/span><\/td>\n<td style=\"width: 25.6443%;\"><span style=\"font-weight: 400;\">0,1-0,9<\/span><\/td>\n<td style=\"width: 14.5619%;\"><span style=\"font-weight: 400;\">1<\/span><\/td>\n<td style=\"width: 24.7423%;\"><span style=\"font-weight: 400;\">4,6-36,5<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\t<\/div>\r\n<\/div>\r\n<style>\r\n\t.custom-table-block table{\r\n\t\theight: initial!important;\r\n\t}\r\n\t.search-input-wrapper{\r\n\t\tposition: relative;\r\n\t\tmargin-bottom: 24px;\r\n\t}\r\n\t.search-input-wrapper svg{\r\n\t\tposition: absolute;\r\n\t\ttop:50%;\r\n\t\tleft:12px;\r\n\t\ttransform: translateY(-50%);\r\n\t}\r\n\t.table-search-input{\r\n\t\tpadding: 0 0 0 40px;\r\n\t\tborder:1px solid #C1CAD1;\r\n\t\theight: 44px;\r\n\t\twidth: 201px;\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t}\r\n\t.table-search-input::placeholder{\r\n\t\tcolor:#092C47;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\ttext-align: left;\r\n\t\twhite-space:nowrap;\r\n\t}\r\n\t\r\n\t.custom-table-block thead{\r\n\t\tmargin-bottom: 14px;\r\n\t}\r\n\r\n\t.custom-table-block tbody tr:nth-child(odd){\r\n\t\tbackground-color: #F6F9FF;\r\n\t}\r\n\r\n\t.custom-table-block tbody, .custom-table-block thead, .custom-table-block tr, .custom-table-block td, .custom-table-block th{\r\n\t\theight: initial!important;\r\n\t}\r\n\t\r\n\t.custom-table-block tbody td{\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tpadding: 7px;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 700;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tcolor:#092C47;\r\n\t\tposition: relative;\r\n\t}\r\n\t.custom-table-block thead th:after{\r\n\t\tcontent:\"\";\r\n\t\tdisplay: inline-block;\r\n\t\tbackground-image: url(\"data:image\/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http:\/\/www.w3.org\/2000\/svg'%3E%3Cpath d='M10.585 0.585938L6 5.17094L1.415 0.585938L0 2.00094L6 8.00094L12 2.00094L10.585 0.585938Z' fill='%23476175'\/%3E%3C\/svg%3E%0A\");\r\n\t\tmargin-left: 8px;\r\n\t\tbackground-position: center center;\r\n\t\tbackground-size: 12px 7.5px;\r\n\t\tbackground-repeat: no-repeat;\r\n\t\twidth: 24px;\r\n\t\theight: 12px;\r\n\t}\r\n\t.custom-table-block{\r\n\t\tmargin: 20px 0;\t\r\n\t}\r\n\t.custom-table-block .table-wrapper{\r\n\t\twidth: 100%;\r\n\t\toverflow-x: auto;\r\n\t}\r\n\t@media(max-width: 768px){\r\n\t\t\/* .custom-table-block tbody td{\r\n\t\t\twhite-space: nowrap;\r\n\t\t} *\/\r\n\t\t.custom-table-block .table-wrapper{\r\n\t\t\tmax-width: calc(100vw - 16px);\r\n\t\t}\r\n\t}\r\n<\/style>\r\n\n\n    <aside class=\"article-content-aside\">\r\n        <a href=\"https:\/\/xometry.pro\/fr\/topic\/impact-du-grenaillage-sur-la-rugosite-de-surface\/\" class=\"aside-image sidebar__aside-image\"><img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/11\/community-icon-1.svg\" alt=\"\"><\/a><a href=\"https:\/\/xometry.pro\/fr\/topic\/impact-du-grenaillage-sur-la-rugosite-de-surface\/\" class=\"aside-link\">Impact du grenaillage sur la rugosit\u00e9 de surface<\/a>    <\/aside>\r\n    \n\n<h2 class=\"wp-block-heading\" id=\"h-classes-de-rugosite-realisables-et-non-realisables-avec-l-usinage-cnc\"><strong>Classes de rugosit\u00e9 r\u00e9alisables et non r\u00e9alisables avec l&rsquo;usinage CNC<\/strong><\/h2>\n\n\n<p>Le tableau ci-dessous donne un aper\u00e7u des m\u00e9thodes de fabrication utilis\u00e9es pour atteindre chaque classe de rugosit\u00e9, les surfaces les plus courantes r\u00e9alisables par usinage CNC \u00e9tant mises en \u00e9vidence <strong>en bleu<\/strong>.<\/p>\n\n\n    <div class=\"fancybox-image-block\">\r\n                        <a href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/FR-roughness-grades-cnc-machining.png\"  data-fancybox=\"gallery\" class=\"slide-fancybox fancybox_title\" title=\"\">\r\n                    <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/FR-roughness-grades-cnc-machining.png\" class=\"fancybox-image-block__img\" style=\"width:700;height: 600;\" >\r\n                    <figcaption><\/figcaption>\r\n                <\/a>\r\n            <\/div>\r\n\n\n<h2 class=\"wp-block-heading\" id=\"h-comment-selectionner-la-rugosite-de-surface-la-plus-adaptee-pour-l-usinage-cnc\"><strong>Comment s\u00e9lectionner la rugosit\u00e9 de surface la plus adapt\u00e9e pour l&rsquo;usinage CNC<\/strong><\/h2>\n\n\n<p>La s\u00e9lection de la rugosit\u00e9 de surface la plus adapt\u00e9e pour l&rsquo;usinage CNC est essentielle pour garantir une performance optimale, une rentabilit\u00e9 et une ad\u00e9quation \u00e0 l&rsquo;application pr\u00e9vue. Pour faire le meilleur choix, plusieurs facteurs doivent \u00eatre soigneusement pris en compte, notamment la fonctionnalit\u00e9 du composant, ses propri\u00e9t\u00e9s mat\u00e9rielles et la complexit\u00e9 de son design. Voici les consid\u00e9rations essentielles \u00e0 prendre en compte pour vous aider \u00e0 prendre votre d\u00e9cision&nbsp;:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Fonctionnalit\u00e9 et usage<\/strong>\n<ul class=\"wp-block-list\">\n<li>Il est important de tenir compte de la fonction sp\u00e9cifique des pi\u00e8ces usin\u00e9es CNC, car la rugosit\u00e9 de surface influe directement sur leurs performances.<\/li>\n\n\n\n<li>Pour les composants tels que les tiges de v\u00e9rins pneumatiques et les pi\u00e8ces optiques, des surfaces lisses sont essentielles (par exemple, 0,4&nbsp;\u03bcm Ra).<\/li>\n\n\n\n<li>Reportez-vous au tableau comparatif pour conna\u00eetre les valeurs Ra recommand\u00e9es pour diff\u00e9rentes applications.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Co\u00fbt et d\u00e9lai de fabrication<\/strong>\n<ul class=\"wp-block-list\">\n<li>Les surfaces plus lisses n\u00e9cessitent des temps d&rsquo;usinage plus longs et augmentent les co\u00fbts de production.<\/li>\n\n\n\n<li>Pour les composants non critiques, une rugosit\u00e9 de surface de 3,2&nbsp;\u03bcm Ra peut permettre de gagner du temps et de r\u00e9duire les co\u00fbts.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Esth\u00e9tique<\/strong>\n<ul class=\"wp-block-list\">\n<li>Les produits grand public gagnent \u00e0 avoir des finitions lisses et brillantes, car celles-ci donnent une impression de qualit\u00e9 sup\u00e9rieure.<\/li>\n\n\n\n<li>Les pi\u00e8ces non visibles, comme les \u00e9l\u00e9ments du syst\u00e8me de suspension, n&rsquo;ont pas forc\u00e9ment besoin de finitions esth\u00e9tiques, ce qui all\u00e8ge les contraintes de production.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Propri\u00e9t\u00e9s du mat\u00e9riau<\/strong>\n<ul class=\"wp-block-list\">\n<li>La rugosit\u00e9 de surface que l&rsquo;on peut obtenir d\u00e9pend du mat\u00e9riau.<\/li>\n\n\n\n<li>L&rsquo;aluminium peut atteindre des valeurs Ra entre 0,1&nbsp;\u00b5m et 1&nbsp;\u00b5m, alors que des mat\u00e9riaux tels que l&rsquo;acier peuvent avoir des limites plus \u00e9lev\u00e9es.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>G\u00e9om\u00e9trie de la pi\u00e8ce<\/strong>\n<ul class=\"wp-block-list\">\n<li>Les designs complexes aux g\u00e9om\u00e9tries complexes demandent plus de temps et un \u00e9quipement sophistiqu\u00e9 pour obtenir des valeurs Ra plus basses.<\/li>\n\n\n\n<li>En cas de budget et de d\u00e9lais limit\u00e9s, il est conseill\u00e9 d&rsquo;opter pour des finitions de surface plus rugueuses pour trouver un \u00e9quilibre entre co\u00fbt et faisabilit\u00e9.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-commande-de-pieces-usinees-cnc-nbsp\"><strong>Commande de pi\u00e8ces usin\u00e9es CNC <\/strong><\/h2>\n\n\n<p>Comprendre ce qu&rsquo;est la rugosit\u00e9 de surface est essentiel pour garantir que vos composants fonctionnent comme pr\u00e9vu. Que vous travailliez sur des engrenages de pr\u00e9cision pour l&rsquo;a\u00e9rospatiale ou des couvercles de moteur durables pour v\u00e9hicules, le bon niveau de rugosit\u00e9 a un impact direct sur la qualit\u00e9 et la fonctionnalit\u00e9. Gr\u00e2ce \u00e0 ces connaissances, vous pouvez prendre des d\u00e9cisions \u00e9clair\u00e9es et optimiser votre prochain projet.<\/p>\n\n\n\n<p>Xometry propose des <a href=\"https:\/\/xometry.eu\/fr\/usinage-cnc\/\" target=\"_blank\" rel=\"noreferrer noopener\">solutions d&rsquo;usinage CNC adapt\u00e9es<\/a> \u00e0 vos besoins sp\u00e9cifiques. Que vous ayez besoin de finitions lisses ou de g\u00e9om\u00e9tries complexes, nos ing\u00e9nieurs sont pr\u00eats \u00e0 vous aider. <a href=\"https:\/\/get.xometry.eu\/?locale=fr\" target=\"_blank\" rel=\"noreferrer noopener\">T\u00e9l\u00e9chargez vos fichiers de CAO<\/a> et obtenez un devis instantan\u00e9.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-alpha-channel-opacity has-background\" style=\"background-color:#f5f7f8;color:#f5f7f8\"\/>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><h2 class=\"wp-block-heading\" id=\"h-outil-de-conversion-de-rugosite-ra-rz-n\"><strong><strong>Outil de conversion de rugosit\u00e9 Ra \u2013 Rz \u2013 N<\/strong><\/strong><\/h2>\n\n\n<p>Vous avez des valeurs de rugosit\u00e9 Ra, Rz ou N et vous avez besoin d\u2019obtenir leurs \u00e9quivalents dans d\u2019autres unit\u00e9s ? Utilisez notre outil gratuit pour le faire.<\/p>\n\n\n    <div class=\"button-block\" style=\"text-align: left\">\r\n        <a href=\"https:\/\/xometry.pro\/fr\/outils\/convertisseur-rugosite-de-surface\/\" target=\"\" class=\"button-block__btn btn_blue\">\r\n                        Essayez-le maintenant                    <\/a>\r\n    <\/div>\r\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><a href=\"https:\/\/xometry.pro\/en-eu\/tools\/surface-roughness-converter\/\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"102\" height=\"102\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/xometry-ra-rz-conversion-tool.svg\" alt=\"\" class=\"wp-image-37630\" style=\"max-width:324px;height:auto\"\/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/xometry-ra-rz-conversion-tool.svg\" data-fancybox=\"gallery-24140\" data-caption=\"\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/05\/xometry-ra-rz-conversion-tool.svg\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><\/a><\/figure>\n<\/div><\/div>\n<\/div>\n","protected":false},"author":50,"featured_media":17944,"comment_status":"open","ping_status":"closed","template":"","categories":[],"c-tag-articles":[],"global-tag":[1698],"class_list":["post-24140","articles","type-articles","status-publish","has-post-thumbnail","hentry","global-tag-usinage-cnc"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.7 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Rugosit\u00e9 de surface en usinage CNC | Xometry Pro<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez les diff\u00e9rents niveaux de rugosit\u00e9 de surface pour l&#039;usinage CNC propos\u00e9s par Xometry, afin de vous aider \u00e0 choisir le bon Ra.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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