{"id":4058,"date":"2022-01-11T01:50:57","date_gmt":"2022-01-11T00:50:57","guid":{"rendered":"https:\/\/www.breizh56.fr\/crepp2024\/?page_id=4058"},"modified":"2022-01-11T01:50:57","modified_gmt":"2022-01-11T00:50:57","slug":"3d-freecad-exercice-11-cache-ventilateur","status":"publish","type":"page","link":"https:\/\/www.breizh56.fr\/crepp2024\/3d-freecad-exercice-11-cache-ventilateur\/","title":{"rendered":"3D FreeCad Exercice 11: cache ventilateur"},"content":{"rendered":"<p>exercice 11: cache ventilateur <a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3d_exo11_cache-ventilateur.pdf\">3d_exo11_cache-ventilateur.pdf<\/a> \u00a0<a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3d_exo11_cache-ventilateur.zip\">Solution FreeCad<\/a><\/p>\n<p>&nbsp;<\/p>\n<p>Voici un exercice qui fait appel \u00e0 ce que vous avez d\u00e9j\u00e0 fait pr\u00e9c\u00e9demment avec une large utilisation de l\u2019atelier Sketcher et des esquisses sur plusieurs plans.<\/p>\n<p>Il s\u2019agit d\u2019un test que je fais actuellement pour essayer de r\u00e9duire le bruit d\u2019un ventilateur de 40x40x10 qui refroidi la hotend de mon imprimante.<\/p>\n<p>Je pars du principe que pour r\u00e9duire le bruit, il fait r\u00e9duire les pertes de charge, donc am\u00e9liorer le flux d\u2019air en le canalisant (on verra bien si \u00e7a marche ou pas).<\/p>\n<p>J\u2019ai donc mod\u00e9lis\u00e9 le dispositif ci-dessous pour r\u00e9aliser des tests et je vous le soumets comme exercice qui va vous permettre de revenir sur la maitrise des esquisses.<\/p>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-01.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4061\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-01-300x293.png\" alt=\"\" width=\"300\" height=\"293\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-01-300x293.png 300w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-01.png 485w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a> <a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-02.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4062\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-02-300x272.png\" alt=\"\" width=\"300\" height=\"272\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-02-300x272.png 300w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-02.png 539w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-03.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4063 size-full\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-03.png\" alt=\"\" width=\"730\" height=\"631\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-03.png 730w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-03-300x259.png 300w\" sizes=\"(max-width: 730px) 100vw, 730px\" \/><\/a><\/p>\n<p><strong>D\u00e9tail de l\u2019exercice\u00a0:<\/strong><\/p>\n<p>Voici les principales \u00e9tapes de la r\u00e9alisation\u00a0:<\/p>\n<ul>\n<li>Esquisse de la partie cylindrique avec parois \u00e0 l\u2019int\u00e9rieure bomb\u00e9e\u00a0: une droite pour l\u2019ext\u00e9rieur, une Bspline pour l\u2019int\u00e9rieur et deux segments de la hauteur de ma buse (0.6 mm). A noter que mon pas de grille est \u00e0 10mm<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-04.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4064 size-full\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-04.png\" alt=\"\" width=\"730\" height=\"249\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-04.png 730w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-04-300x102.png 300w\" sizes=\"(max-width: 730px) 100vw, 730px\" \/><\/a><\/p>\n<p>(Je vous laisse faire le choix des axes des diff\u00e9rents plans de construction)<\/p>\n<p>1. Cr\u00e9ation du volume autour de l\u2019axe\u00a0 <a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-05.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4065\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-05.png\" alt=\"\" width=\"54\" height=\"42\" \/><\/a><\/p>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-06.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4066\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-06-271x300.png\" alt=\"\" width=\"271\" height=\"300\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-06-271x300.png 271w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-06.png 379w\" sizes=\"(max-width: 271px) 100vw, 271px\" \/><\/a><\/p>\n<p>2. Cr\u00e9ation de l\u2019esquisse des ailettes\u00a0: deux Bsplines raccord\u00e9es par 1 petits segments de la largeur de la buse (pas de la grille \u00e0 5 mm et plan perpendiculaire au premier)<\/p>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-07.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4067 size-full\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-07.png\" alt=\"\" width=\"447\" height=\"576\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-07.png 447w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-07-233x300.png 233w\" sizes=\"(max-width: 447px) 100vw, 447px\" \/><\/a><\/p>\n<p>A noter que ces profils sont compl\u00e8tement empiriques<\/p>\n<p>3. Protrusion de l\u2019esquisse jusqu\u2019\u00e0 \u00eatre en intersection avec le cylindre :<\/p>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-08.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4068\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-08-300x251.png\" alt=\"\" width=\"300\" height=\"251\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-08-300x251.png 300w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-08.png 499w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>4. R\u00e9p\u00e9tition circulaire de l\u2019ailette (7) autour de l\u2019axe du cylindre<\/p>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-09.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4069\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-09-296x300.png\" alt=\"\" width=\"296\" height=\"300\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-09-296x300.png 296w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-09-80x80.png 80w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-09.png 456w\" sizes=\"(max-width: 296px) 100vw, 296px\" \/><\/a><\/p>\n<p>5. Ajout d\u2019un c\u00f4ne central D=10, d=6, h=25 + rayon de 6 mm au sommet<\/p>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-10.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4070\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-10-300x288.png\" alt=\"\" width=\"300\" height=\"288\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-10-300x288.png 300w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-10.png 457w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>6. Ajout de la semelle de fixation de 40x40x3 \u00e0 l\u2019aide d\u2019une \u00bd esquisse (pas de grille 10 mm et plan perpendiculaire \u00e0 l\u2019axe du cylindre)\u00a0:<\/p>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-11.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4071 size-full\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-11.png\" alt=\"\" width=\"380\" height=\"592\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-11.png 380w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-11-193x300.png 193w\" sizes=\"(max-width: 380px) 100vw, 380px\" \/><\/a><\/p>\n<p>7.\u00a0Protrusion de la semelle de 3 mm en la positionnant bien \u00e0 la base de l\u2019objet<\/p>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-12.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4072\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-12-300x270.png\" alt=\"\" width=\"300\" height=\"270\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-12-300x270.png 300w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-12.png 515w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>8. Duplication sym\u00e9trique de la \u00bd semelle\u00a0:<\/p>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-13.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4073\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-13-300x285.png\" alt=\"\" width=\"300\" height=\"285\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-13-300x285.png 300w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-13.png 505w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>9. R\u00e9alisation des 4 per\u00e7ages de 3 mm (1 + 3 par r\u00e9p\u00e9tition circulaire) + cong\u00e9s + fraisages<\/p>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-14.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4074\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-14-300x288.png\" alt=\"\" width=\"300\" height=\"288\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-14-300x288.png 300w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-14.png 517w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Et voil\u00e0 vous \u00eates arriv\u00e9s au bout<\/p>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-15.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4075 size-medium\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-15-300x263.png\" alt=\"\" width=\"300\" height=\"263\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-15-300x263.png 300w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-15.png 764w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a> <a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-16.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4076 size-medium\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-16-300x272.png\" alt=\"\" width=\"300\" height=\"272\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-16-300x272.png 300w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-16.png 729w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a> <a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-17.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4077 size-full\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-17.png\" alt=\"\" width=\"757\" height=\"727\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-17.png 757w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo11_-17-300x288.png 300w\" sizes=\"(max-width: 757px) 100vw, 757px\" \/><\/a><\/p>\n<p>Vous noterez que les ailettes ne remontent pas jusqu\u2019en haut du cylindre contrairement au mod\u00e8le 3D\u00a0: cela vient du choix du profil de l\u2019esquisse de l\u2019ailette trop pointu d\u2019un c\u00f4t\u00e9 (ce qui explique mon choix du segment de 0.6 mm pour \u00e9viter cela sur la face contre le ventilateur)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>exercice 11: cache ventilateur 3d_exo11_cache-ventilateur.pdf \u00a0Solution FreeCad &nbsp; Voici un exercice qui fait appel \u00e0 ce que vous avez d\u00e9j\u00e0 fait pr\u00e9c\u00e9demment avec une large utilisation de l\u2019atelier Sketcher et des esquisses sur plusieurs plans. Il s\u2019agit d\u2019un test que je fais actuellement pour essayer de r\u00e9duire le bruit d\u2019un ventilateur de 40x40x10 qui refroidi la hotend de mon imprimante. [&#8230;]<\/p>\n","protected":false},"author":7,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-4058","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.breizh56.fr\/crepp2024\/wp-json\/wp\/v2\/pages\/4058"}],"collection":[{"href":"https:\/\/www.breizh56.fr\/crepp2024\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.breizh56.fr\/crepp2024\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.breizh56.fr\/crepp2024\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.breizh56.fr\/crepp2024\/wp-json\/wp\/v2\/comments?post=4058"}],"version-history":[{"count":7,"href":"https:\/\/www.breizh56.fr\/crepp2024\/wp-json\/wp\/v2\/pages\/4058\/revisions"}],"predecessor-version":[{"id":4084,"href":"https:\/\/www.breizh56.fr\/crepp2024\/wp-json\/wp\/v2\/pages\/4058\/revisions\/4084"}],"wp:attachment":[{"href":"https:\/\/www.breizh56.fr\/crepp2024\/wp-json\/wp\/v2\/media?parent=4058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}