{"id":865,"date":"2024-02-11T18:57:35","date_gmt":"2024-02-11T17:57:35","guid":{"rendered":"https:\/\/initiale.ovh\/?p=865"},"modified":"2024-05-01T16:41:24","modified_gmt":"2024-05-01T14:41:24","slug":"cintrage-au-sable","status":"publish","type":"post","link":"https:\/\/initiale.ovh\/index.php\/2024\/02\/11\/cintrage-au-sable\/","title":{"rendered":"Cintrage au sable"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Comme son nom l&rsquo;indique, cette technique requiert que le tube de cuivre soit pr\u00e9alablement rempli de sable. Une fois chauff\u00e9, on peut alors donner au tube de cuivre la forme que l&rsquo;on veut sans le moindre raccord. L\u2019installation est ainsi particuli\u00e8rement esth\u00e9tique puisque dans le meilleur des cas, seuls quelques embo\u00eetures et piquages relieront les diff\u00e9rents tubes. Par ailleurs, les rayons de courbure que l&rsquo;on peut r\u00e9aliser sont bien plus petits qu&rsquo;avec des cintreuses et peuvent \u00e9galement s\u2019encha\u00eener. En effet, avec l&rsquo;exp\u00e9rience, on se rend vite compte qu&rsquo;un premier cintre devient g\u00eanant pour r\u00e9aliser un second avec une cintreuse.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Comme pour tout les cintrages, une bonne <a href=\"https:\/\/initiale.ovh\/index.php\/2024\/05\/01\/les-epures\/\">\u00e9pure<\/a> et un r\u00e9glet semi-rigide seront vos meilleurs amis.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Application en vid\u00e9o<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"\u2705  PLOMBERIE : CINTRAGE CUIVRE...AU SABLE ! - TUTO  - LJVS\" width=\"1032\" height=\"581\" src=\"https:\/\/www.youtube.com\/embed\/tRyFwJCxESM?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dans la vid\u00e9o ci-dessus, il manque tout de m\u00eame quelques explications \u00e0 propos des longueurs de chauffe, m\u00eame si manifestement il est parfaitement possible de s&rsquo;en affranchir. Mais si on veut aller jusqu&rsquo;au bout de la pr\u00e9cision, voil\u00e0 comment proc\u00e9der.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Explications suppl\u00e9mentaires<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>Sur les rayons de courbure<\/em><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Jusqu&rsquo;\u00e0 16 mm de diam\u00e8tre ext\u00e9rieur inclus, le rayon de cintrage minimal vaut R = D<sub>ext<\/sub> x 3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Au-del\u00e0 de 16 mm de diam\u00e8tre ext\u00e9rieur, le rayon de cintrage minimal vaut R = D<sub>ext<\/sub> x 4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Au del\u00e0 de 22 mm, bon courage pour cintrer au sable&#8230;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>Sur le cintrage en lui-m\u00eame<\/em><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Pour r\u00e9aliser un cintre rapide, on marque habituellement le tube avec sa longueur de chauffe. Une fois le tube chauff\u00e9 entre ces deux marques, il est possible de le cintrer d&rsquo;un seul coup, et non par \u00e0-coups comme on peut le voir sur la vid\u00e9o.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>Qu&rsquo;est-ce que la longueur de chauffe ?<\/em><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">La longueur de chauffe (L), c&rsquo;est tout simplement la longueur sur laquelle il faut chauffer le tube pour obtenir le rayon de cintrage (R) d\u00e9sir\u00e9. On la calcule ainsi : L = \u03b1.R avec \u03b1 en radians. Pour \u03b1 = 2\u03c0, on retrouve le p\u00e9rim\u00e8tre du cercle (2\u03c0.R). Pour un cintre de 90\u00b0, soit \u03c0\/2 radians, on d\u00e9termine L \u2248 1,57 x R.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>Application concr\u00e8te<\/em><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Dans l&rsquo;exemple ci-dessous, on cherche \u00e0 cintrer deux tubes tout en maintenant une \u00e9cart de 5 cm entre les deux :<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\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-full is-resized\"><a href=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_01.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"393\" height=\"207\" src=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_01.jpg\" alt=\"\" class=\"wp-image-885\" style=\"width:264px;height:auto\" srcset=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_01.jpg 393w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_01-300x158.jpg 300w\" sizes=\"auto, (max-width: 393px) 100vw, 393px\" \/><\/a><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">L<sub>1<\/sub> = 1,57 x 4 x 18 mm = 113,04 mm<br>L<sub>2<\/sub> = 1,57 x (R<sub>L1<\/sub> + 50) mm = 191,54 mm<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L<sub>3<\/sub> = 1,57 x 3 x 12 mm = 56,52 mm<br>L<sub>4<\/sub> = 1,57 x (R<sub>L3<\/sub> + 50) mm = 135,02 mm<\/p>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Remarque : le rayon de courbure des tuyaux qui suivent le plus cintr\u00e9 est \u00e9gal au rayon du plus cintr\u00e9, plus l&rsquo;\u00e9cart entre les tuyaux.<\/em><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\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-full\"><a href=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_02.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"342\" height=\"238\" src=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_02.jpg\" alt=\"\" class=\"wp-image-887\" srcset=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_02.jpg 342w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_02-300x209.jpg 300w\" sizes=\"auto, (max-width: 342px) 100vw, 342px\" \/><\/a><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Une fois l&rsquo;\u00e9tape des calculs pass\u00e9es, on r\u00e9alise les marquages correspondant au longueurs de chauffe sur les diff\u00e9rents tubes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dans l&rsquo;exemple ci-contre, on commence les cintrages, donc les marquages \u00e0 10 cm de l&rsquo;extr\u00e9mit\u00e9. Pratiquement, il suffit de chauffer \u00e0 partir de 10 cm et jusqu&rsquo;\u00e0 \u00ab&nbsp;10 cm + la longueur de chauffe&nbsp;\u00bb pour former L<sub>1<\/sub> et L<sub>2<\/sub>.<\/p>\n<\/div>\n<\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>R\u00e9aliser un chapeau de gendarme au sable<\/em><\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_03.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"740\" height=\"198\" src=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_03.jpg\" alt=\"\" class=\"wp-image-888\" srcset=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_03.jpg 740w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_03-300x80.jpg 300w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_03-421x113.jpg 421w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><\/a><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">On r\u00e9alise d&rsquo;abord un coude \u00e0 90\u00b0 \u00e0 la distance <em>d<\/em> avant de refroidir le tube. On pince ensuite le coude dans l&rsquo;\u00e9tau, puis on chauffe les longueurs permettant de former les deux coudes \u00e0 45\u00b0 afin de former le chapeau. Mais quelles longueurs&nbsp;?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On cherche \u00e0 former un chapeau de gendarme permettant de sauter d&rsquo;une distance <em>e<\/em> par-dessus un tuyau faisant obstacle. Cependant, le tuyau \u00e0 cintrer est d\u00e9j\u00e0 situ\u00e9 \u00e0 une distance \u03b5 du mur. Ainsi, le saut \u00e0 effectuer ne vaut donc que <em>x<\/em> = e \u2013 \u03b5.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\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-full\"><a href=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_03-b.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"598\" height=\"231\" src=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_03-b.jpg\" alt=\"\" class=\"wp-image-890\" srcset=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_03-b.jpg 598w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_03-b-300x116.jpg 300w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_03-b-421x163.jpg 421w\" sizes=\"auto, (max-width: 598px) 100vw, 598px\" \/><\/a><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center wp-block-paragraph\">\u00c0 l&rsquo;aide d&rsquo;une r\u00e8gle et d&rsquo;une \u00e9querre, on va inscrire deux marques \u00e0 \u00e9quidistance du coude \u00e0 90\u00b0 sur le tuyau devant former le chapeau de gendarme. Ces deux marques vont nous permettre par la suite de former les deux coudes \u00e0 45\u00b0 qui formeront ledit chapeau.<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\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-full\"><a href=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_03-c.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"508\" height=\"191\" src=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_03-c.jpg\" alt=\"\" class=\"wp-image-892\" srcset=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_03-c.jpg 508w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_03-c-300x113.jpg 300w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_03-c-421x158.jpg 421w\" sizes=\"auto, (max-width: 508px) 100vw, 508px\" \/><\/a><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center wp-block-paragraph\">Les longueurs de chauffe permettant de former les deux cintres \u00e0 45\u00b0 vaudront \u03c0\/4 radians, soit L \u2248 0,79 x R. Ces longueurs de chauffe seront r\u00e9parties pour les deux tiers en amont des deux marques et pour un tiers en aval des deux marques.<\/p>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Remarque : cette technique des 2\/3 1\/3 est une technique empirique.<\/em><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\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\"><a href=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_04_IMG_20231011_143236-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_04_IMG_20231011_143236-1024x768.jpg\" alt=\"\" class=\"wp-image-894\" srcset=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_04_IMG_20231011_143236-1024x768.jpg 1024w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_04_IMG_20231011_143236-300x225.jpg 300w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_04_IMG_20231011_143236-768x576.jpg 768w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_04_IMG_20231011_143236-1536x1152.jpg 1536w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_04_IMG_20231011_143236-2048x1536.jpg 2048w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_04_IMG_20231011_143236-400x300.jpg 400w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Les cintres \u00e0 45\u00b0 sont r\u00e9alis\u00e9s en m\u00eame temps<\/figcaption><\/figure>\n<\/div><\/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\"><a href=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_05_IMG_20231011_100111-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_05_IMG_20231011_100111-1024x768.jpg\" alt=\"\" class=\"wp-image-895\" srcset=\"https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_05_IMG_20231011_100111-1024x768.jpg 1024w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_05_IMG_20231011_100111-300x225.jpg 300w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_05_IMG_20231011_100111-768x576.jpg 768w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_05_IMG_20231011_100111-1536x1152.jpg 1536w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_05_IMG_20231011_100111-2048x1536.jpg 2048w, https:\/\/initiale.ovh\/wp-content\/uploads\/2024\/02\/Cintrage-sable_05_IMG_20231011_100111-400x300.jpg 400w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">R\u00e9sultat final<\/figcaption><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-l-039-initiale wp-block-embed-l-039-initiale\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"SMrx5gye9t\"><a href=\"https:\/\/initiale.ovh\/index.php\/2024\/01\/24\/le-cuivre\/\">Le cuivre<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"\u00ab\u00a0Le cuivre\u00a0\u00bb &#8212; L&#039;Initiale\" src=\"https:\/\/initiale.ovh\/index.php\/2024\/01\/24\/le-cuivre\/embed\/#?secret=UCTMWXRXkK#?secret=SMrx5gye9t\" data-secret=\"SMrx5gye9t\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Comme son nom l&rsquo;indique, cette technique requiert que le tube de cuivre soit pr\u00e9alablement rempli de sable. Une fois chauff\u00e9, on peut alors donner au &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-865","post","type-post","status-publish","format-standard","hentry","category-plomberie"],"_links":{"self":[{"href":"https:\/\/initiale.ovh\/index.php\/wp-json\/wp\/v2\/posts\/865","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/initiale.ovh\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/initiale.ovh\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/initiale.ovh\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/initiale.ovh\/index.php\/wp-json\/wp\/v2\/comments?post=865"}],"version-history":[{"count":18,"href":"https:\/\/initiale.ovh\/index.php\/wp-json\/wp\/v2\/posts\/865\/revisions"}],"predecessor-version":[{"id":1129,"href":"https:\/\/initiale.ovh\/index.php\/wp-json\/wp\/v2\/posts\/865\/revisions\/1129"}],"wp:attachment":[{"href":"https:\/\/initiale.ovh\/index.php\/wp-json\/wp\/v2\/media?parent=865"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/initiale.ovh\/index.php\/wp-json\/wp\/v2\/categories?post=865"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/initiale.ovh\/index.php\/wp-json\/wp\/v2\/tags?post=865"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}