{"id":1373,"date":"2023-05-03T15:42:00","date_gmt":"2023-05-03T15:42:00","guid":{"rendered":"https:\/\/novanta.com\/fr\/precision-manufacturing\/resources\/whitepapers\/optimisation-de-la-densite-energetique-pour-la-gravure-en-profondeur\/"},"modified":"2026-09-02T11:01:52","modified_gmt":"2026-09-02T11:01:52","slug":"optimisation-de-la-densite-energetique-pour-la-gravure-en-profondeur","status":"publish","type":"novanta_tech_paper","link":"https:\/\/novanta.com\/fr\/precision-manufacturing\/ressources\/documents-blancs\/optimisation-de-la-densite-energetique-pour-la-gravure-en-profondeur\/","title":{"rendered":"Optimisation de la densit\u00e9 \u00e9nerg\u00e9tique pour la gravure en profondeur"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"h-technical-paper-overview\">Pr\u00e9sentation de l&rsquo;article technique<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-optimizing-energy-density-for-deep-engraving-fluence-not-average-power-decides-deep-engraving-quality-and-removal-rate\"><strong>Optimisation de la densit\u00e9 d&rsquo;\u00e9nergie pour la gravure profonde<\/strong><br><em>C\u2019est la fluence, et non la puissance moyenne, qui d\u00e9termine la qualit\u00e9 de la gravure en profondeur et le taux d\u2019enl\u00e8vement de mati\u00e8re.<\/em><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La gravure profonde pour la joaillerie et l&rsquo;horlogerie s&rsquo;inscrit dans une fen\u00eatre de processus tr\u00e8s \u00e9troite : taux d&rsquo;enl\u00e8vement d&rsquo;environ 5 mm\u00b3\/min, rugosit\u00e9 de surface inf\u00e9rieure \u00e0 2 \u00b5m, angles nets de 50 \u00b5m, absence de bavures et une microstructure de 1 \u00e0 5 \u00b5m suffisamment fine pour r\u00e9fl\u00e9chir la lumi\u00e8re et produire une couleur sp\u00e9cifique \u2014 sans post-traitement. Atteindre ces quatre objectifs simultan\u00e9ment n\u2019est pas une question de puissance. C\u2019est une question de fluence.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cet article technique r\u00e9dig\u00e9 par trois auteurs de Novanta rend compte d\u2019essais syst\u00e9matiques de gravure profonde sur de l\u2019acier inoxydable \u00e0 l\u2019aide d\u2019un laser picoseconde de 40 W et 8 ps, d\u2019une t\u00eate de balayage 2D Squirrel de 11 mm et d\u2019une lentille F-th\u00eata de 80 mm \u2014 en faisant varier la fr\u00e9quence de r\u00e9p\u00e9tition du laser (200 kHz contre 1 MHz), de la puissance (50 % contre 100 %) et du mode de rafale (1 \u00e0 10 impulsions) afin de mettre en corr\u00e9lation la fluence avec le taux d\u2019enl\u00e8vement et la rugosit\u00e9 de surface.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-key-takeaways-include\">Principales conclusions :<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pourquoi la gravure en profondeur est limit\u00e9e par la qualit\u00e9 et non par la puissance \u2014 une puissance moyenne plus \u00e9lev\u00e9e n&rsquo;am\u00e9liore pas les r\u00e9sultats \u00e0 moins que la vitesse de balayage n&rsquo;augmente en cons\u00e9quence<\/li>\n\n\n\n<li>Comment la fluence (densit\u00e9 d\u2019\u00e9nergie par impulsion) est li\u00e9e au taux d\u2019enl\u00e8vement et \u00e0 la rugosit\u00e9 de surface \u2014 et \u00e0 quel moment les courbes s\u2019inversent<\/li>\n\n\n\n<li>Quand un fonctionnement \u00e0 200 kHz est pr\u00e9f\u00e9rable \u00e0 1 MHz : la gravure profonde o\u00f9 un fort chevauchement des impulsions \u00e0 1 MHz cr\u00e9e des bavures de 30 \u00b5m<\/li>\n\n\n\n<li>Ce qu\u2019apporte le fonctionnement en mode rafale : r\u00e9partir l\u2019\u00e9nergie de l\u2019impulsion sur 2\/5\/10 sous-impulsions pour ajuster avec pr\u00e9cision la fluence en dessous des limites d\u2019une impulsion unique<\/li>\n\n\n\n<li>Une recette optimale et pratique document\u00e9e : 0,6 J\/cm\u00b2 \u00e0 200 kHz, ~18 W, 10 impulsions en rafale \u2192 gravure lisse sur acier avec finition color\u00e9e<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e9l\u00e9chargez l\u2019article technique complet pour consulter les courbes de taux d\u2019ablation en fonction de la fluence pour les deux fr\u00e9quences de r\u00e9p\u00e9tition, les cartes de rugosit\u00e9 de surface allant de 1,5 \u00b5m \u00e0 30 \u00b5m, ainsi que la recette optimale document\u00e9e pour la gravure profonde sur acier dans les applications de joaillerie et d&rsquo;horlogerie \u2014 avant de vous rabattre sur la puissance laser maximale et de vous retrouver avec des artefacts de bords br\u00fbl\u00e9s.<a href=\"https:\/\/novantaphotonics.com\/wp-content\/uploads\/2023\/05\/Laser_Deep_Engraving_Whitepaper.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pr\u00e9sentation de l&rsquo;article technique Optimisation de la densit\u00e9 d&rsquo;\u00e9nergie pour la gravure profondeC\u2019est la fluence, et non la puissance moyenne, qui d\u00e9termine la qualit\u00e9 de la gravure en profondeur et le taux d\u2019enl\u00e8vement de mati\u00e8re. La gravure profonde pour la joaillerie et l&rsquo;horlogerie s&rsquo;inscrit dans une fen\u00eatre de processus tr\u00e8s \u00e9troite : taux d&rsquo;enl\u00e8vement d&rsquo;environ [&hellip;]<\/p>\n","protected":false},"author":342,"featured_media":380,"template":"","meta":{"_acf_changed":true,"card_thumbnail_id":0,"show_table_of_content":true},"class_list":["post-1373","novanta_tech_paper","type-novanta_tech_paper","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.1 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Optimizing Energy Density for Deep Engraving | Novanta<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez comment r\u00e9gler la densit\u00e9 d&#039;\u00e9nergie d&#039;un syst\u00e8me de gravure laser afin d&#039;obtenir des marquages profonds et durables, sans compromettre la vitesse de marquage laser ni l&#039;int\u00e9grit\u00e9 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