[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.gpdst.cz\/presna-vyroba-der\/#Article","mainEntityOfPage":"https:\/\/www.gpdst.cz\/presna-vyroba-der\/","headline":"P\u0159esn\u00e1 v\u00fdroba d\u011br","name":"P\u0159esn\u00e1 v\u00fdroba d\u011br","description":"Nej\u010dast\u011bji otvory maj\u00ed kruhov\u00fd tvar, ale v\u00fdjimkou nejsou i jin\u00e9. Pro dokonalou p\u0159esnost rozhodn\u011b nesta\u010d\u00ed pouh\u00fd vrt\u00e1k, a proto mus\u00edme…","datePublished":"2020-10-03","dateModified":"2020-10-03","author":{"@type":"Person","@id":"https:\/\/www.gpdst.cz\/author\/devene\/#Person","name":"devene","url":"https:\/\/www.gpdst.cz\/author\/devene\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/13dbcc20b7c05fcb5c4a6b0bee5a7107a0aae9238a83a4088a42d170780b2eca?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/13dbcc20b7c05fcb5c4a6b0bee5a7107a0aae9238a83a4088a42d170780b2eca?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"gpdst.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.gpdst.cz\/wp-content\/uploads\/otvory%20v%20oceli.jpg","url":"https:\/\/www.gpdst.cz\/wp-content\/uploads\/otvory%20v%20oceli.jpg","height":0,"width":0},"url":"https:\/\/www.gpdst.cz\/presna-vyroba-der\/","about":["D\u011bti"],"wordCount":493,"articleBody":"   Nej\u010dast\u011bji otvory maj\u00ed kruhov\u00fd tvar, ale v\u00fdjimkou nejsou i jin\u00e9. Pro dokonalou p\u0159esnost rozhodn\u011b nesta\u010d\u00ed pouh\u00fd vrt\u00e1k, a proto mus\u00edme s\u00e1hnou po v\u00fdstru\u017en\u00edku.P\u0159esn\u00e1 v\u00fdroba d\u011brRozhoduj\u00ed velmi mal\u00e9 rozm\u011bryVe v\u00fdrob\u011b pot\u0159ebujeme ka\u017edou chv\u00edli vyr\u00e1b\u011bt n\u011bjak\u00fd otvor, proto\u017ee ty maj\u00ed spousty vyu\u017eit\u00ed. Jedn\u00edm p\u0159\u00edkladem je upev\u0148ov\u00e1n\u00ed dan\u00e9 sou\u010d\u00e1stky, proto\u017ee kdy\u017e se do n\u00ed vyvrt\u00e1 pot\u0159ebn\u00e9 mno\u017estv\u00ed d\u011br, tak do nich m\u016f\u017eeme d\u00e1t \u0161rouby a p\u0159es matice k jin\u00e9 sou\u010d\u00e1stce ut\u00e1hnout. Samoz\u0159ejm\u011b i v samotn\u00e9 d\u00ed\u0159e m\u016f\u017ee b\u00fdt z\u00e1vit, co\u017e u\u017e z\u00e1le\u017e\u00ed na dan\u00e9 situaci. \u0160roubov\u00e9 spojen\u00ed je velmi vyu\u017e\u00edvan\u00e9, proto\u017ee m\u00e1 dobrou pevnost, nestoj\u00ed moc pen\u011bz a z\u00e1rove\u0148 se d\u00e1 kdykoliv rozeb\u00edrat.Sou\u010d\u00e1stky nemaj\u00ed neomezenou \u017eivotnost, tak\u017ee m\u00edt mo\u017enost je rozebrat a vym\u011bnit je v\u017edy na m\u00edst\u011b. U takov\u00e9ho pou\u017eit\u00ed posta\u010d\u00ed spr\u00e1vn\u011b zvolen\u00fd oby\u010dejn\u00fd vrt\u00e1k, kter\u00fd je v\u017edy o n\u011bco v\u011bt\u0161\u00ed. A proto neposta\u010duje pro p\u0159esnou v\u00fdrobu, kde nap\u0159\u00edklad pot\u0159ebujeme m\u00edt spojen\u00ed h\u0159\u00eddele s d\u00edrou. To m\u016f\u017ee b\u00fdt r\u016fzn\u00e9, ale v\u017edy zde rozhoduj\u00ed malink\u00e9 rozm\u011bry, a proto mus\u00edme d\u00edru nejprve vyvrtat klasick\u00fdm vrt\u00e1kem a n\u00e1sledn\u011b je\u0161t\u011b pou\u017e\u00edt staviteln\u00fd v\u00fdstru\u017en\u00edk, co\u017e je velmi p\u0159esn\u00fd n\u00e1stroj.V\u00fdstru\u017en\u00edkyKdy\u017e si zm\u011b\u0159\u00edte klasick\u00fd vrt\u00e1k, tak nem\u00e1 pr\u016fm\u011br p\u0159esn\u011b po milimetrech, proto\u017ee je v\u017edy o n\u011bco v\u011bt\u0161\u00ed. To je hlavn\u011b kv\u016fli tomu, aby kdy\u017e chceme m\u00edt pr\u016fchoz\u00ed d\u00edru, tak je v\u011bt\u0161\u00ed, aby n\u00ed hezky pro\u0161el nap\u0159\u00edklad \u0161roub. To plat\u00ed i o dal\u0161\u00edch sou\u010d\u00e1stk\u00e1ch, a proto p\u0159i b\u011b\u017en\u00e9m vyu\u017eit\u00ed je to skv\u011bl\u00e1 vlastnost, kterou vyu\u017eijeme a nemus\u00edme nic \u0159e\u0161it. Ale existuj\u00ed i p\u0159\u00edpady, kdy mus\u00ed b\u00fdt otvor velmi p\u0159esn\u00fd, proto\u017ee v n\u011bm bude jist\u00fd p\u0159edm\u011bt. Do d\u00edry m\u016f\u017eeme nap\u0159\u00edklad nalisovat lo\u017eisko, d\u00edky kter\u00e9mu se n\u00e1m bude hezky ot\u00e1\u010det h\u0159\u00eddel. D\u00edra pro nalisov\u00e1n\u00ed lo\u017eiska mus\u00ed b\u00fdt p\u0159esn\u011b dan\u00e1, aby lo\u017eisko po nalisov\u00e1n\u00ed hezky dr\u017eelo. A proto nejprve vyvrt\u00e1me o n\u011bco men\u0161\u00ed d\u00edru a n\u00e1sledn\u011b pou\u017eijeme staviteln\u00fd v\u00fdstru\u017en\u00edk, kter\u00fd hezky odebere zbytek materi\u00e1lu a z\u016fstane po n\u011bm pot\u0159ebn\u00fd otvor. V\u00fdstru\u017en\u00edky jsou normalizovan\u00e9, kdy je pomoc\u00ed normy hezky n\u00e1stroj nalezneme a z\u00e1rove\u0148 n\u00e1m norma zaji\u0161\u0165uje p\u0159edepsan\u00e9 rozm\u011bry. Nesm\u00ed chyb\u011bt ani pevn\u00fd n\u00e1strojov\u00fd materi\u00e1l.                                                                                                                                                                                                                                                                                                                                                                                           5\/5 - (1 vote)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"P\u0159esn\u00e1 v\u00fdroba d\u011br","item":"https:\/\/www.gpdst.cz\/presna-vyroba-der\/#breadcrumbitem"}]}]