{"id":4144,"date":"2022-01-11T14:22:32","date_gmt":"2022-01-11T13:22:32","guid":{"rendered":"https:\/\/www.breizh56.fr\/crepp2024\/?page_id=4144"},"modified":"2022-01-11T14:22:32","modified_gmt":"2022-01-11T13:22:32","slug":"3d-freecad-exercice-8-clamb","status":"publish","type":"page","link":"https:\/\/www.breizh56.fr\/crepp2024\/3d-freecad-exercice-8-clamb\/","title":{"rendered":"3D FreeCad exercice 8: clamb de CNC"},"content":{"rendered":"<p><strong>Exercice 8<\/strong> <a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_clamp.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">3D_exo8_clamp.pdf<\/a> <a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_clamp.zip\">solution exo8_clamp<\/a><\/p>\n<p><strong><em>R\u00e9alisation d&rsquo;un clamp de CNC<\/em><\/strong><\/p>\n<p>Cet exercice apporte la nouveaut\u00e9 de l\u2019utilisation de plusieurs corps dans un fichier FreeCad.<\/p>\n<p>Ce sont les constituants d\u2019une bride de serrage de pi\u00e8ce \u00e0 usiner sur une CNC\u00a0:<\/p>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4148\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-1.png\" alt=\"\" width=\"1106\" height=\"599\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-1.png 1106w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-1-300x162.png 300w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-1-768x416.png 768w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-1-1024x555.png 1024w\" sizes=\"(max-width: 1106px) 100vw, 1106px\" \/><\/a><\/p>\n<p><strong>Nota Important\u00a0:<\/strong><\/p>\n<p>Quand on travaille sur un m\u00e9canisme \u00e0 plusieurs corps, il est fr\u00e9quent d\u2019oublier de rendre actif le corps pertinent sur lequel on veut ajouter\/soustraire une primitive ou r\u00e9aliser une transformation =&gt; pas de r\u00e9sultat visible<\/p>\n<p><strong><u>Donc, veiller \u00e0 s\u00e9lectionner le bon corps pour le rendre actif avant toute op\u00e9ration <\/u><\/strong><\/p>\n<p>en particulier lors de modification en fin de r\u00e9alisation<\/p>\n<p><strong>Etapes de l\u2019exercice\u00a0:<\/strong><\/p>\n<ul>\n<li>R\u00e9alisation du contour du clamp \u00e0 partir de l\u2019image ci-dessous et ceci dans l\u2019atelier sketcher<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-2.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4149\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-2.png\" alt=\"\" width=\"851\" height=\"572\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-2.png 851w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-2-300x202.png 300w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-2-768x516.png 768w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-2-90x60.png 90w\" sizes=\"(max-width: 851px) 100vw, 851px\" \/><\/a><\/p>\n<ul>\n<li>Protrusion du contour de 20 mm<\/li>\n<li>R\u00e9alisation d\u2019un \u00e9videment pour passer la vis M8 de serrage et permettre la rotation du clamp<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-3.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4150\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-3.png\" alt=\"\" width=\"669\" height=\"527\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-3.png 669w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-3-300x236.png 300w\" sizes=\"(max-width: 669px) 100vw, 669px\" \/><\/a><\/p>\n<ul>\n<li>R\u00e9alisation du \u00bd cylindre de diam\u00e8tre 15,8 mm, haute qui permet cette rotation\u00a0:<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-4.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4151\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-4.png\" alt=\"\" width=\"469\" height=\"507\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-4.png 469w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-4-278x300.png 278w\" sizes=\"(max-width: 469px) 100vw, 469px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-5.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4152\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-5.png\" alt=\"\" width=\"716\" height=\"524\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-5.png 716w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-5-300x220.png 300w\" sizes=\"(max-width: 716px) 100vw, 716px\" \/><\/a><\/p>\n<ul>\n<li>Mod\u00e9lisation d\u2019une Vis M8x80 (sans le pas de vis qui fera l\u2019objet d\u2019un tuto ult\u00e9rieur)<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-6.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4153\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-6.png\" alt=\"\" width=\"592\" height=\"260\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-6.png 592w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-6-300x132.png 300w\" sizes=\"(max-width: 592px) 100vw, 592px\" \/><\/a><\/p>\n<p>J\u2019ai joint ci-apr\u00e8s le tableau des dimensions des \u00e9crous (et t\u00eate de vis) de M 1.6 \u00e0 M 52 =&gt; indispensable pour construire le prisme aditif ou soustractif (dans le cas d\u2019une empreinte) \u00e0 partir du cercle circonscrit et de la hauteur de l\u2019\u00e9crou<\/p>\n<p>Nota\u00a0: dans le cas d\u2019une empreinte polygonale destin\u00e9e \u00e0 recevoir un \u00e9crou dans une impression 3D, ne pas h\u00e9siter \u00e0 augmenter la valeur de R de 0.2 mm voir plus pour tenir compte de la contraction de la pi\u00e8ce au refroidissement (si usage du plateau en temp\u00e9rature), idem pour les trous =&gt; l\u2019id\u00e9al est de tenir un historique de ses exp\u00e9riences (ce que je me dis qu\u2019il faudrait que je fasse\u00a0J)<\/p>\n<ul>\n<li>R\u00e9alisation de la molette de serrage<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-8.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4155\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-8.png\" alt=\"\" width=\"788\" height=\"349\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-8.png 788w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-8-300x133.png 300w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-8-768x340.png 768w\" sizes=\"(max-width: 788px) 100vw, 788px\" \/><\/a> <a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-7.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4154\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-7.png\" alt=\"\" width=\"503\" height=\"500\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-7.png 503w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-7-150x150.png 150w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-7-300x298.png 300w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-7-80x80.png 80w\" sizes=\"(max-width: 503px) 100vw, 503px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>L\u2019empreinte de l\u2019\u00e9crou est construite avec un polygone soustractif de R=7,3 et de 7mm de hauteur<\/p>\n<p>Pour les crans de la molette, utiliser un cercle soustractif de R=10, le d\u00e9caler pour avoir la bonne valeur de l\u2019empreinte puis faire une r\u00e9p\u00e9tition circulaire (ici \u00e7a n\u2019a pas march\u00e9 pour moi\u00a0L)<\/p>\n<p>Et voil\u00e0, vous avez r\u00e9ussi votre 1<sup>er<\/sup> assemblage PartDesign<\/p>\n<p><a href=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-9.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4156\" src=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-9.png\" alt=\"\" width=\"870\" height=\"893\" srcset=\"https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-9.png 870w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-9-292x300.png 292w, https:\/\/www.breizh56.fr\/crepp2024\/wp-content\/uploads\/2022\/01\/3D_exo8_-9-768x788.png 768w\" sizes=\"(max-width: 870px) 100vw, 870px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Exercice 8 3D_exo8_clamp.pdf solution exo8_clamp R\u00e9alisation d&rsquo;un clamp de CNC Cet exercice apporte la nouveaut\u00e9 de l\u2019utilisation de plusieurs corps dans un fichier FreeCad. Ce sont les constituants d\u2019une bride de serrage de pi\u00e8ce \u00e0 usiner sur une CNC\u00a0: Nota Important\u00a0: Quand on travaille sur un m\u00e9canisme \u00e0 plusieurs corps, il est fr\u00e9quent d\u2019oublier de rendre actif le corps pertinent [&#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-4144","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.breizh56.fr\/crepp2024\/wp-json\/wp\/v2\/pages\/4144"}],"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=4144"}],"version-history":[{"count":6,"href":"https:\/\/www.breizh56.fr\/crepp2024\/wp-json\/wp\/v2\/pages\/4144\/revisions"}],"predecessor-version":[{"id":4162,"href":"https:\/\/www.breizh56.fr\/crepp2024\/wp-json\/wp\/v2\/pages\/4144\/revisions\/4162"}],"wp:attachment":[{"href":"https:\/\/www.breizh56.fr\/crepp2024\/wp-json\/wp\/v2\/media?parent=4144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}