{"id":13077,"date":"2024-10-14T18:40:16","date_gmt":"2024-10-14T10:40:16","guid":{"rendered":"https:\/\/www.sogaworks.com\/?p=13077"},"modified":"2024-10-15T12:39:20","modified_gmt":"2024-10-15T04:39:20","slug":"understanding-press-fit-tolerance","status":"publish","type":"post","link":"https:\/\/www.sogaworks.com\/fr\/blogs\/understanding-press-fit-tolerance\/","title":{"rendered":"Comprendre les tol\u00e9rances d'ajustement \u00e0 la presse dans les assemblages"},"content":{"rendered":"
La tol\u00e9rance d'emmanchement, \u00e9galement connue sous le nom de tol\u00e9rance d'ajustement serr\u00e9, fait r\u00e9f\u00e9rence \u00e0 la plage de dimensions admissibles pour les composants appari\u00e9s dans lesquels une pi\u00e8ce (g\u00e9n\u00e9ralement un arbre) est l\u00e9g\u00e8rement plus grande que le trou qu'elle apparie, ce qui se traduit par une connexion \u00e9troite et frictionnelle. Cet article aborde les bases de la tol\u00e9rance d'embo\u00eetement, notamment ce qu'est l'embo\u00eetement, la tol\u00e9rance d'embo\u00eetement et la tol\u00e9rance d'embo\u00eetement.<\/p>\n\n\n\n
Qu'est-ce que les Fits\uff1f ?<\/strong><\/h2>\n\n\n\n
Les ajustements sont les relations entre la zone de tol\u00e9rance de l'appariement des trous et des arbres \u00e0 la m\u00eame taille de base. On peut \u00e9galement dire que les ajustements sont le jeu entre l'appariement du trou et de l'arbre. Le jeu peut \u00eatre \u00e0 la fois positif et n\u00e9gatif. L'importance du jeu d\u00e9termine si les deux pi\u00e8ces appari\u00e9es peuvent se d\u00e9placer ou tourner ind\u00e9pendamment l'une de l'autre ou si elles sont reli\u00e9es de mani\u00e8re temporaire ou permanente.<\/p>\n\n\n\n
Il existe trois types d'ajustements : l'ajustement de d\u00e9gagement, l'ajustement de transition et l'ajustement d'entr\u00e9e. ajustement \u00e0 la presse (ajustement d'interf\u00e9rence)<\/strong>.<\/p>\n\n\n\n
Ajustement de l'espace : <\/strong>La zone de tol\u00e9rance du trou est sup\u00e9rieure \u00e0 celle de l'arbre, c'est-\u00e0-dire que le trou est plus grand que l'arbre.<\/p>\n\n\n\n
Press fit : <\/strong>La zone de tol\u00e9rance du trou est inf\u00e9rieure \u00e0 celle de l'arbre, c'est-\u00e0-dire que l'arbre est plus grand que le trou.<\/p>\n\n\n\n
Ajustement de transition : Les zones de tol\u00e9rance du trou et de l'arbre se chevauchent. Toute paire de trous et d'arbres peut obtenir un jeu ou un ajustement serr\u00e9.<\/p>\n\n\n\n
<\/p>\n\n\n\n<\/figure>\n\n\n\n
<\/p>\n\n\n\n
Qu'est-ce que la tol\u00e9rance d'ajustement ?<\/strong><\/h2>\n\n\n\n
La tol\u00e9rance d'ajustement est le degr\u00e9 de jeu ou d'interf\u00e9rence entre l'arbre et le trou. Elle d\u00e9termine le degr\u00e9 de serrage ou de rel\u00e2chement de ces pi\u00e8ces. Pour l'ajustement par jeu, la tol\u00e9rance d'ajustement est la diff\u00e9rence entre le jeu maximal et le jeu minimal ; pour l'ajustement par interf\u00e9rence, la tol\u00e9rance d'ajustement est la diff\u00e9rence entre l'interf\u00e9rence minimale et l'interf\u00e9rence maximale ; pour l'ajustement par transition, la tol\u00e9rance d'ajustement est la diff\u00e9rence entre le jeu maximal et l'interf\u00e9rence maximale.<\/p>\n\n\n\n
Syst\u00e8me de base \u00e0 trous<\/strong><\/h3>\n\n\n\n
Le syst\u00e8me de base des trous est un syst\u00e8me qui associe la zone de tol\u00e9rance d'un trou avec un \u00e9cart de base fixe et la zone de tol\u00e9rance d'un arbre avec un \u00e9cart de base diff\u00e9rent. Le trou dans le syst\u00e8me de base est appel\u00e9 trou de r\u00e9f\u00e9rence et son code d'\u00e9cart de base est \"H\". Le syst\u00e8me de trous de base utilis\u00e9 est le H7p6 mentionn\u00e9 ci-dessous.<\/p>\n\n\n\n
Syst\u00e8me de base de l'arbre<\/strong><\/h3>\n\n\n\n
Le syst\u00e8me de l'arbre de base est un syst\u00e8me qui associe la zone de tol\u00e9rance d'un arbre avec un \u00e9cart de base fixe \u00e0 celle d'un trou avec un \u00e9cart de base diff\u00e9rent. L'arbre dans le syst\u00e8me de l'arbre de base est appel\u00e9 l'arbre de r\u00e9f\u00e9rence et son code d'\u00e9cart de base est \"h\".<\/p>\n\n\n\n
Qu'est-ce que la tol\u00e9rance de pressage\uff1f ?<\/strong><\/h2>\n\n\n\n
D'apr\u00e8s le paragraphe pr\u00e9c\u00e9dent, nous savons que la tol\u00e9rance d'ajustement va jusqu'\u00e0 la zone de tol\u00e9rance de l'arbre et du trou, il est donc facile de comprendre que le symbole de la tol\u00e9rance d'ajustement comprend la description de la zone de tol\u00e9rance de l'arbre et du trou. Si l'on prend l'exemple de H7p6, H7 d\u00e9crit la zone de tol\u00e9rance du trou et p6 est la zone de tol\u00e9rance de l'arbre. Les lettres et les chiffres repr\u00e9sentent la plage et le niveau de tol\u00e9rance.<\/p>\n\n\n\n<\/figure>\n\n\n\n
Les niveaux de tol\u00e9rance d\u00e9finissent la plage de tol\u00e9rance des diff\u00e9rentes tailles de pi\u00e8ces. Selon la norme CNS, ils comprennent 20 niveaux, IT01, IT0, IT1...IT17 et IT18, parmi lesquels IT01 repr\u00e9sente la plus petite plage de tol\u00e9rance. Les pi\u00e8ces trait\u00e9es selon le niveau de tol\u00e9rance IT01 sont les plus pr\u00e9cises, tandis que IT18 est l'inverse.<\/p>\n\n\n\n
<\/p>\n\n\n\n<\/figure>\n\n\n\n
<\/p>\n\n\n\n
Vous pensez peut-\u00eatre que la table des classes de tol\u00e9rance d\u00e9termine la taille de la zone de tol\u00e9rance, alors pourquoi avons-nous besoin de la lettre de la zone de tol\u00e9rance ? Son but est de sp\u00e9cifier l'emplacement de la zone de tol\u00e9rance.<\/p>\n\n\n\n
<\/p>\n\n\n\n<\/figure>\n\n\n\n
<\/p>\n\n\n\n
Comme on peut le voir ci-dessus, les lettres majuscules repr\u00e9sentent la d\u00e9viation fondamentale du trou, et les lettres minuscules repr\u00e9sentent la d\u00e9viation fondamentale de l'arbre. Il existe 28 positions de A \u00e0 ZC par rapport \u00e0 la taille de base. La lettre indique leur position par rapport \u00e0 la taille de base, qui comprend une d\u00e9viation positive ou n\u00e9gative.<\/p>\n\n\n\n
En regardant le H7p6, nous supposons que la taille de base de l'arbre et du trou est de 30 mm. La lettre initiale de H7 est une lettre majuscule, ce qui signifie que cette tol\u00e9rance d'ajustement d\u00e9crit la zone de tol\u00e9rance du trou. H signifie que la taille de base est d\u00e9finie comme origine. 7 est le niveau de tol\u00e9rance. D'apr\u00e8s le tableau des niveaux de tol\u00e9rance CNS, nous savons que les limites de tol\u00e9rance sup\u00e9rieure et inf\u00e9rieure correspondant \u00e0 la taille de base de 30 mm sont comprises entre 0,021 mm, de sorte que la tol\u00e9rance H7 est de 0 ~ + 0,021 mm, et que la taille du trou est comprise entre 30 mm et 30,021 mm.<\/p>\n\n\n\n
La lettre p6 est en minuscule, ce qui signifie que cette tol\u00e9rance d'ajustement d\u00e9crit la zone de tol\u00e9rance de l'arbre. p signifie que le point plus grand que la taille de base + 0,035 mm est utilis\u00e9 comme origine. D'apr\u00e8s le tableau des niveaux de tol\u00e9rance CNS, nous savons que la plage de tol\u00e9rance correspondant \u00e0 la taille de base de 30 mm est de 0,013 mm. Par cons\u00e9quent, la tol\u00e9rance g6 est de +0,022mm ~ +0,035mm, et la plage de taille de l'arbre est de 30,022mm-30,035mm.<\/p>\n\n\n\n
Par cons\u00e9quent, la tol\u00e9rance d'ajustement de H7p6 est la suivante tol\u00e9rance d'ajustement \u00e0 la presse<\/strong>.<\/p>\n\n\n\n
Tableau des tol\u00e9rances d'ajustement \u00e0 la presse<\/h2>\n\n\n\n
Le tableau ci-dessous pr\u00e9sente les classes d'ajustement \u00e0 la presse et de tol\u00e9rance les plus courantes avec le syst\u00e8me de base des trous.<\/p>\n\n\n\n<\/figure>","protected":false},"excerpt":{"rendered":"
La tol\u00e9rance d'emmanchement, \u00e9galement connue sous le nom de tol\u00e9rance d'ajustement serr\u00e9, fait r\u00e9f\u00e9rence \u00e0 la plage de dimensions admissibles pour les composants appari\u00e9s dans lesquels une pi\u00e8ce (g\u00e9n\u00e9ralement un arbre) est l\u00e9g\u00e8rement plus grande que le trou qu'elle apparie, ce qui se traduit par une connexion \u00e9troite et frictionnelle. Cet article aborde les bases de la tol\u00e9rance d'embo\u00eetement, notamment ce qu'est l'embo\u00eetement, la tol\u00e9rance d'embo\u00eetement et la tol\u00e9rance d'embo\u00eetement.<\/p>","protected":false},"author":1,"featured_media":13080,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[8],"tags":[],"class_list":["post-13077","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cnc-machining"],"yoast_head":"\n
Understanding Press Fit Tolerance in Assemblies<\/title>\n<meta name=\"description\" content=\"Press fit tolerance, also known as interference fit tolerance, refers to the allowable range of sizes for mating components in which one part (usually a shaft) is slightly larger than the hole it pairing.\" \/>\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.sogaworks.com\/fr\/blogs\/understanding-press-fit-tolerance\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Understanding Press Fit Tolerance in Assemblies\" \/>\n<meta property=\"og:description\" content=\"Press fit tolerance, also known as interference fit tolerance, refers to the allowable range of sizes for mating components in which one part (usually a shaft) is slightly larger than the hole it pairing.\" \/>\n<meta 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