{"id":4798,"date":"2019-03-22T17:41:46","date_gmt":"2019-03-22T21:41:46","guid":{"rendered":"https:\/\/www.elastoproxy.com\/?p=4798"},"modified":"2019-03-22T17:50:29","modified_gmt":"2019-03-22T21:50:29","slug":"tolerances-pieces-caoutchouc","status":"publish","type":"post","link":"https:\/\/www.elastoproxy.com\/fr\/tolerances-pieces-caoutchouc\/","title":{"rendered":"Tol\u00e9rances sur des pi\u00e8ces en caoutchouc vs. tol\u00e9rances sur des pi\u00e8ces en m\u00e9tal"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"4798\" class=\"elementor elementor-4798 elementor-bc-flex-widget\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-999e85e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"999e85e\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-8f19b43\" data-id=\"8f19b43\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-17be9e0 elementor-widget elementor-widget-text-editor\" data-id=\"17be9e0\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Les tol\u00e9rances sur les pi\u00e8ces en caoutchouc sont des variations de taille autoris\u00e9es pour les produits industriels en caoutchouc. Connus \u00e9galement sous le nom de tol\u00e9rances dimensionnelles, ces chiffres sont exprim\u00e9s en tant que valeurs <em>plus ou moins<\/em> (\u00b1) pour une gamme de tailles de pi\u00e8ces. Les ing\u00e9nieurs affichent r\u00e9guli\u00e8rement des dimensions dans leurs dessins, mais saviez-vous que les tol\u00e9rances des pi\u00e8ces en caoutchouc et des pi\u00e8ces en m\u00e9tal ne sont pas les m\u00eames ? Si vous concevez une pi\u00e8ce en caoutchouc avec les m\u00eames tol\u00e9rances techniques qu&rsquo;une pi\u00e8ce m\u00e9tallique, vous devriez peut-\u00eatre revoir la conception de votre joint.<\/p><h2><strong>Le manuel de la RMA (Rubber Manufacturers Association &#8211; Association des Producteurs de Caoutchouc) et les tol\u00e9rances dimensionnelles<\/strong><\/h2><p>Le manuel de la RMA, une publication d&rsquo;un groupe professionnel de premier plan, peut vous aider \u00e0 \u00e9viter cette situation. Cette publication technique d\u00e9finit les tol\u00e9rances des pi\u00e8ces et les classe en cat\u00e9gories afin que les fournisseurs de mat\u00e9riaux, les fabricants de produits en caoutchouc et les ing\u00e9nieurs de produits utilisent tous un \u00ab langage commun \u00bb. Le manuel de la RMA contient des tableaux avec des dimensions auxquelles vous pouvez vous attendre pour chaque classe de produits en caoutchouc moul\u00e9s ou extrud\u00e9s. Il y a aussi diff\u00e9rentes tables pour diff\u00e9rents processus, telles que pour les coupes inclin\u00e9es par rapport aux longueurs \u00e9piss\u00e9es.<\/p><p>Pourtant, beaucoup d&rsquo;ing\u00e9nieurs en savent moins sur les tol\u00e9rances des pi\u00e8ces en caoutchouc que sur celles en m\u00e9tal. Cela peut repr\u00e9senter un d\u00e9fi lorsque vient le temps de concevoir des joints en caoutchouc, des joints d\u2019isolation ou des isolants. Les propri\u00e9t\u00e9s mat\u00e9rielles des m\u00e9taux sont diff\u00e9rentes de celles du caoutchouc et les tol\u00e9rances des pi\u00e8ces m\u00e9talliques sont plus strictes ou plus fines. Il y a plusieurs raisons pour cela. Premi\u00e8rement, le caoutchouc est plus sensible que le m\u00e9tal aux changements de temp\u00e9rature et d\u2019humidit\u00e9. La fabrication de caoutchouc utilise \u00e9galement des outils et des \u00e9quipements diff\u00e9rents de ceux utilis\u00e9s dans la production des m\u00e9taux.<\/p><p>\u00cates-vous habitu\u00e9 \u00e0 travailler avec des t\u00f4les m\u00e9talliques ou des profil\u00e9s m\u00e9talliques ? Si oui, vous d\u00e9couvrirez peut-\u00eatre qu&rsquo;il y a une courbe d\u2019apprentissage \u00e0 consid\u00e9rer avec le caoutchouc &#8211; un groupe de mat\u00e9riaux qui comprend des \u00e9lastom\u00e8res thermodurcissables synth\u00e9tiques ainsi que du caoutchouc naturel. Vous pouvez \u00e9galement \u00e9prouver un peu de confusion ou de frustration si vous soumettez un dessin qui n\u00e9cessite des r\u00e9visions en raison des tol\u00e9rances r\u00e9pertori\u00e9es. Pour faciliter le processus de conception il est donc utile de comprendre quelques notions de base sur le contenu du manuel de la RMA. Voici ce que vous devez savoir.<\/p><h2><strong>Produits en caoutchouc moul\u00e9<\/strong><\/h2><p>Le manuel de la RMA r\u00e9pertorie quatre niveaux de tol\u00e9rances techniques pour les produits en caoutchouc moul\u00e9.<\/p><ul><li>A1 \u2013 Haute pr\u00e9cision<\/li><li>A2 \u2013 Pr\u00e9cision<\/li><li>A3 \u2013 Commercial<\/li><li>A4 \u2013 \u00c9l\u00e9mentaire ou basique<\/li><\/ul><p>En r\u00e8gle g\u00e9n\u00e9rale, les produits en caoutchouc de haute pr\u00e9cision entra\u00eenent des co\u00fbts de mat\u00e9riau plus \u00e9lev\u00e9s. Leur moulage co\u00fbte plus cher car la conception et l\u2019usinage exigent un degr\u00e9 de pr\u00e9cision sup\u00e9rieur. C\u2019est pourquoi le manuel de la RMA recommande de limiter les tol\u00e9rances de haute pr\u00e9cision aux dimensions critiques. Pour de nombreuses pi\u00e8ces moul\u00e9es en caoutchouc les tol\u00e9rances commerciales (A3) conviennent parfaitement.<\/p><p>Lorsque vous utilisez le manuel de la RMA pour les produits en caoutchouc moul\u00e9, il faut rechercher la table de tol\u00e9rance dont vous avez besoin. Par exemple, le tableau 4 concerne les produits en caoutchouc moul\u00e9 avec des tol\u00e9rances commerciales (A3). Pour chaque gamme de tailles de pi\u00e8ces en millim\u00e8tres et en pouces vous verrez que les montants <em>plus et moins<\/em> (\u00b1) sont indiqu\u00e9s pour les dimensions fixes et de fermeture.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-12734e7 elementor-widget elementor-widget-image\" data-id=\"12734e7\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"336\" src=\"https:\/\/www.elastoproxy.com\/wp-content\/uploads\/2019\/03\/Table-4-1024x336.png\" class=\"attachment-large size-large wp-image-4764\" alt=\"RMA Handbook - Table 4\" srcset=\"https:\/\/www.elastoproxy.com\/wp-content\/uploads\/2019\/03\/Table-4-1024x336.png 1024w, https:\/\/www.elastoproxy.com\/wp-content\/uploads\/2019\/03\/Table-4-300x98.png 300w, https:\/\/www.elastoproxy.com\/wp-content\/uploads\/2019\/03\/Table-4-768x252.png 768w, https:\/\/www.elastoproxy.com\/wp-content\/uploads\/2019\/03\/Table-4.png 1079w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2262087 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2262087\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-fcde760\" data-id=\"fcde760\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-dce35c0 elementor-widget elementor-widget-text-editor\" data-id=\"dce35c0\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><strong>Produits en caoutchouc extrud\u00e9<\/strong><\/h2><p>Les produits en caoutchouc extrud\u00e9 se distinguent des produits en caoutchouc moul\u00e9 par la mani\u00e8re dont ils sont fabriqu\u00e9s. Les extrusions sont forc\u00e9es \u00e0 travers une fili\u00e8re avec une section sp\u00e9cifique sous pression. La matrice est un outil fabriqu\u00e9 avec pr\u00e9cision, mais la plupart des compos\u00e9s de caoutchouc gonflent et prennent de la dimension lorsqu&rsquo;ils sortent de l&rsquo;orifice de la matrice.<\/p><p>Il y a quatre cat\u00e9gories RMA pour les produits en caoutchouc extrud\u00e9.<\/p><ul><li>1 \u2013 Haute pr\u00e9cision<\/li><li>2 \u2013 Pr\u00e9cision<\/li><li>3 \u2013 Commercial<\/li><li>4 \u2013 \u00c9l\u00e9mentaire ou basique<\/li><\/ul><p>Il y a aussi de nombreux tableaux de tol\u00e9rance diff\u00e9rents, comme le montre le tableau 12 du manuel de la RMA.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b25a8f1 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b25a8f1\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a4adba0\" data-id=\"a4adba0\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b5fcb94 elementor-widget elementor-widget-image\" data-id=\"b5fcb94\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"461\" src=\"https:\/\/www.elastoproxy.com\/wp-content\/uploads\/2019\/03\/Table-12-1024x461.png\" class=\"attachment-large size-large wp-image-4768\" alt=\"RMA Handbook - Table 12\" srcset=\"https:\/\/www.elastoproxy.com\/wp-content\/uploads\/2019\/03\/Table-12-1024x461.png 1024w, https:\/\/www.elastoproxy.com\/wp-content\/uploads\/2019\/03\/Table-12-300x135.png 300w, https:\/\/www.elastoproxy.com\/wp-content\/uploads\/2019\/03\/Table-12-768x346.png 768w, https:\/\/www.elastoproxy.com\/wp-content\/uploads\/2019\/03\/Table-12.png 1072w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7f0e2c0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7f0e2c0\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ebaa5f7\" data-id=\"ebaa5f7\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-89db883 elementor-widget elementor-widget-text-editor\" data-id=\"89db883\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Lorsque vous utilisez le manuel de la RMA pour les produits en caoutchouc extrud\u00e9, il faut rechercher la table de tol\u00e9rance dont vous avez besoin. Par exemple, le tableau 16 est le tableau de tol\u00e9rance de longueur de coupe pour les extrusions non \u00e9piss\u00e9es.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d33a880 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d33a880\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4b61f0f\" data-id=\"4b61f0f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-59bf0b8 elementor-widget elementor-widget-image\" data-id=\"59bf0b8\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"792\" src=\"https:\/\/www.elastoproxy.com\/wp-content\/uploads\/2019\/03\/Table-16-1024x792.png\" class=\"attachment-large size-large wp-image-4772\" alt=\"RMA Handbook - Cut Length Tolerance Table\" srcset=\"https:\/\/www.elastoproxy.com\/wp-content\/uploads\/2019\/03\/Table-16-1024x792.png 1024w, https:\/\/www.elastoproxy.com\/wp-content\/uploads\/2019\/03\/Table-16-300x232.png 300w, https:\/\/www.elastoproxy.com\/wp-content\/uploads\/2019\/03\/Table-16-768x594.png 768w, https:\/\/www.elastoproxy.com\/wp-content\/uploads\/2019\/03\/Table-16.png 1101w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Les tol\u00e9rances sur les pi\u00e8ces en caoutchouc sont des variations de taille autoris\u00e9es pour les produits industriels en caoutchouc. Connus \u00e9galement sous le nom de tol\u00e9rances dimensionnelles, ces chiffres sont exprim\u00e9s en tant que valeurs plus ou moins (\u00b1) pour une gamme de tailles de pi\u00e8ces. Les ing\u00e9nieurs affichent r\u00e9guli\u00e8rement des dimensions dans leurs dessins, [&hellip;]<\/p>\n","protected":false},"author":20,"featured_media":4776,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","ofc_enable_fullscreen":"disable","ofc_fullscreen_speed":0,"ofc_fullscreen_nav":"enable","ofc_fullscreen_nav_pos":"right","ofc_fullscreen_nav_color":"","ofc_fullscreen_nav_tooltip_color":"","ofc_fullscreen_responsive":0,"osh_disable_topbar_sticky":"default","osh_disable_header_sticky":"default","osh_sticky_header_style":"default","osh_sticky_header_effect":"","osh_custom_sticky_logo":0,"osh_custom_retina_sticky_logo":0,"osh_custom_sticky_logo_height":0,"osh_background_color":"","osh_links_color":"","osh_links_hover_color":"","osh_links_active_color":"","osh_links_bg_color":"","osh_links_hover_bg_color":"","osh_links_active_bg_color":"","osh_menu_social_links_color":"","osh_menu_social_hover_links_color":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"off","ocean_gallery_id":[],"footnotes":""},"categories":[15],"tags":[550,658,657,656,655,654,652,651,650,653],"class_list":["post-4798","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classifiee","tag-elastoproxy","tag-manuelrma","tag-tolerancesdimensionnelles","tag-tolerancespieces","tag-tolerancespiecescaoutchouc","tag-manuel-de-la-rma","tag-tolerances-dimensionnelles","tag-tolerances-sur-des-pieces","tag-tolerances-sur-des-pieces-en-caoutchouc","tag-tolerances-techniques","entry","has-media"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Tol\u00e9rances sur des pi\u00e8ces en caoutchouc|Tol\u00e9rances dimensionnelles|Tol\u00e9rances m\u00e9caniques<\/title>\n<meta name=\"description\" content=\"Les tol\u00e9rances sur les pi\u00e8ces en caoutchouc (tol\u00e9rances dimensionnelles, tol\u00e9rances techniques) sont des variations de taille admissibles pour les produits industriels en caoutchouc.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.elastoproxy.com\/fr\/tolerances-pieces-caoutchouc\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tol\u00e9rances sur des pi\u00e8ces en caoutchouc|Tol\u00e9rances dimensionnelles|Tol\u00e9rances m\u00e9caniques\" \/>\n<meta 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