[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.bestis.cz\/protahovaci-trn-je-specialni-nastroj\/#Article","mainEntityOfPage":"https:\/\/www.bestis.cz\/protahovaci-trn-je-specialni-nastroj\/","headline":"Protahovac\u00ed trn je speci\u00e1ln\u00ed n\u00e1stroj","name":"Protahovac\u00ed trn je speci\u00e1ln\u00ed n\u00e1stroj","description":"Protahovac\u00ed trn neboli protahov\u00e1k znaj\u00ed velmi dov\u0159e v\u0161ichni stroja\u0159i. S t\u00edmto n\u00e1strojem se seznamuj\u00ed v pr\u016fb\u011bhu v\u00fduky na st\u0159edn\u00edch \u0161kol\u00e1ch a u\u010dili\u0161t\u00edch a je to dokonce obl\u00edben\u00fd p\u0159edm\u011bt pro tvorbu technick\u00fdch v\u00fdkres\u016f. Laick\u00e1 ve\u0159ejnost s t\u011bmito n\u00e1stroji nep\u0159ijde prakticky v\u016fbec do styku,<p class=\"link-more\"><a class=\"myButt three\" href=\"https:\/\/www.bestis.cz\/protahovaci-trn-je-specialni-nastroj\/\">Read More<\/a><\/p>","datePublished":"2024-09-14","dateModified":"2024-09-14","author":{"@type":"Person","@id":"https:\/\/www.bestis.cz\/author\/#Person","name":"","url":"https:\/\/www.bestis.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/f5ad5dcd5c02ecc0fdaf1fe4b2e9a39ad5c5cc2b614885090f6f77b1ccabb3a9?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/f5ad5dcd5c02ecc0fdaf1fe4b2e9a39ad5c5cc2b614885090f6f77b1ccabb3a9?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"bestis.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.bestis.cz\/wp-content\/uploads\/key-677851_640_2.jpg","url":"https:\/\/www.bestis.cz\/wp-content\/uploads\/key-677851_640_2.jpg","height":0,"width":0},"url":"https:\/\/www.bestis.cz\/protahovaci-trn-je-specialni-nastroj\/","about":["Zbo\u017e\u00ed"],"wordCount":413,"articleBody":"   Protahovac\u00ed trn neboli protahov\u00e1k znaj\u00ed velmi dov\u0159e v\u0161ichni stroja\u0159i. S t\u00edmto n\u00e1strojem se seznamuj\u00ed v pr\u016fb\u011bhu v\u00fduky na st\u0159edn\u00edch \u0161kol\u00e1ch a u\u010dili\u0161t\u00edch a je to dokonce obl\u00edben\u00fd p\u0159edm\u011bt pro tvorbu technick\u00fdch v\u00fdkres\u016f. Laick\u00e1 ve\u0159ejnost s t\u011bmito n\u00e1stroji nep\u0159ijde prakticky v\u016fbec do styku, a tak je pro mnoh\u00e9 z v\u00e1s z\u00e1hadou, co to vlastn\u011b je, k \u010demu to slou\u017e\u00ed, a pro\u010d je ve stroj\u00edrenstv\u00ed zapot\u0159eb\u00ed n\u011bco tak slo\u017eit\u00e9ho \u010di nesrozumiteln\u00e9ho, kdy\u017e by m\u011bly stroja\u0159\u016fm sta\u010dit vrt\u00e1ky (v\u00fdhrubn\u00edky a v\u00fdstru\u017en\u00edky), soustru\u017enick\u00e9 no\u017ee, fr\u00e9zy a brusn\u00e9 kotou\u010de pro b\u011b\u017en\u00e9 obr\u00e1b\u011bc\u00ed procesy.Protahovac\u00ed trny jsou velice sv\u00e9r\u00e1zn\u00e9 a tak\u00e9 drah\u00e9 obr\u00e1b\u011bc\u00ed n\u00e1stroje. Aby se v\u016fbec v\u00fdroba protahov\u00e1ku vyplatila, mus\u00ed b\u00fdt p\u0159edem jasn\u00e9, \u017ee bude obr\u00e1b\u011bt velk\u00e9 s\u00e9rie obrobk\u016f. Je to tedy n\u00e1stroj ur\u010den\u00fd v\u00fdhradn\u011b pro velkos\u00e9riovou v\u00fdrobu. Protahovac\u00ed trn p\u0159ipom\u00edn\u00e1 ozuben\u00fd h\u0159eben, ka\u017ed\u00fd zub postupn\u00fdm protahov\u00e1n\u00edm n\u00e1stroje skrze p\u0159edvrtan\u00fd otvor odeb\u00edr\u00e1 drobnou t\u0159\u00edsku, a\u017e dojde na posledn\u00ed zub, kter\u00fd m\u00e1 ji\u017e fin\u00e1ln\u00ed tvar otvoru a vlastn\u011b jej za\u010dist\u00ed a proces obr\u00e1b\u011bn\u00ed zakon\u010d\u00ed. A co se s n\u00edm tedy nap\u0159\u00edklad zhotovuje?Velmi slo\u017eit\u00e9 vnit\u0159n\u00ed otvory \u2013 jestli\u017ee pot\u0159ebujete zhotovit v kovov\u00e9m materi\u00e1lu komplikovan\u00fd a z hlediska geometrick\u00fdch tvar\u016f velmi slo\u017eit\u00fd otvor, nem\u00e1te prakticky jinou mo\u017enost, ne\u017e pou\u017e\u00edt protahov\u00e1k. P\u0159edstavte si kup\u0159\u00edkladu otvor v podob\u011b dev\u00edtic\u00edp\u00e9 hv\u011bzdy, anebo v podob\u011b nesoum\u011brn\u00e9 k\u0159ivky. Velmi typick\u00fdm p\u0159\u00edkladem takov\u00e9ho otvoru jsou vlo\u017eky do dve\u0159n\u00edch z\u00e1mk\u016f ve va\u0161ich dve\u0159\u00edch.Ka\u017ed\u00fd den berete do ruky kl\u00ed\u010de. A\u017e je zas r\u00e1no p\u0159ed odchodem do zam\u011bstn\u00e1n\u00ed uchop\u00edte do dlan\u011b, pozorn\u011b se na jeden z kl\u00ed\u010d\u016f zad\u00edvejte ze v\u0161ech \u00fahl\u016f a zejm\u00e9na zep\u0159edu \u2013 otvor pro kl\u00ed\u010d v mosazn\u00e9 z\u00e1mkov\u00e9 vlo\u017ece se vyr\u00e1b\u00ed t\u00edmto zp\u016fsobem a jak jist\u011b uzn\u00e1te, je to velmi slo\u017eit\u00fd a komplikovan\u00fd otvor, kter\u00fd byste nevyrobili ani vrt\u00e1kem ani ni\u010d\u00edm jin\u00fdm.                                                                                                                                                                                                                                                                                                                                                                                          3.7\/5 - (7 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Protahovac\u00ed trn je speci\u00e1ln\u00ed n\u00e1stroj","item":"https:\/\/www.bestis.cz\/protahovaci-trn-je-specialni-nastroj\/#breadcrumbitem"}]}]