[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.terosat.cz\/protahovaci-trny-patri-k-nejdrazsim-strojirenskym-nastrojum\/#Article","mainEntityOfPage":"https:\/\/www.terosat.cz\/protahovaci-trny-patri-k-nejdrazsim-strojirenskym-nastrojum\/","headline":"Protahovac\u00ed trny pat\u0159\u00ed k nejdra\u017e\u0161\u00edm stroj\u00edrensk\u00fdm n\u00e1stroj\u016fm","name":"Protahovac\u00ed trny pat\u0159\u00ed k nejdra\u017e\u0161\u00edm stroj\u00edrensk\u00fdm n\u00e1stroj\u016fm","description":"V\u00edte, co je to protahovac\u00ed trn? S t\u011bmito stroj\u00edrensk\u00fdmi n\u00e1stroji se seznamuj\u00ed u\u010dni a \u017e\u00e1ci st\u0159edn\u00edch odborn\u00fdch \u0161kol ji\u017e ve druh\u00e9m \u010di ve t\u0159et\u00edm ro\u010dn\u00edku a sou\u010d\u00e1st\u00ed v\u00fduky je i vytvo\u0159en\u00ed v\u00fdkresov\u00e9 dokumentace. Mnoz\u00ed z nich na tyto speci\u00e1ln\u00ed n\u00e1stroje pohl\u00ed\u017e\u00ed s velk\u00fdm zaujet\u00edm, proto\u017ee nepat\u0159\u00ed mezi b\u011b\u017en\u00fd stroj\u00edrensk\u00fd standard, s n\u00edm\u017e p\u0159ich\u00e1z\u00ed do styku […]","datePublished":"2023-01-22","dateModified":"2023-05-07","author":{"@type":"Person","@id":"https:\/\/www.terosat.cz\/author\/#Person","name":"","url":"https:\/\/www.terosat.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/0c97be8873d84c78e7a3da39294dc9e209ea44cdddcf1d79ac5ad761aa3cfc7f?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/0c97be8873d84c78e7a3da39294dc9e209ea44cdddcf1d79ac5ad761aa3cfc7f?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"terosat.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.terosat.cz\/wp-content\/uploads\/mechanical-engineering-g8b726550b_640.jpg","url":"https:\/\/www.terosat.cz\/wp-content\/uploads\/mechanical-engineering-g8b726550b_640.jpg","height":0,"width":0},"url":"https:\/\/www.terosat.cz\/protahovaci-trny-patri-k-nejdrazsim-strojirenskym-nastrojum\/","about":["Produkty"],"wordCount":414,"articleBody":"   V\u00edte, co je to protahovac\u00ed trn? S t\u011bmito stroj\u00edrensk\u00fdmi n\u00e1stroji se seznamuj\u00ed u\u010dni a \u017e\u00e1ci st\u0159edn\u00edch odborn\u00fdch \u0161kol ji\u017e ve druh\u00e9m \u010di ve t\u0159et\u00edm ro\u010dn\u00edku a sou\u010d\u00e1st\u00ed v\u00fduky je i vytvo\u0159en\u00ed v\u00fdkresov\u00e9 dokumentace. Mnoz\u00ed z nich na tyto speci\u00e1ln\u00ed n\u00e1stroje pohl\u00ed\u017e\u00ed s velk\u00fdm zaujet\u00edm, proto\u017ee nepat\u0159\u00ed mezi b\u011b\u017en\u00fd stroj\u00edrensk\u00fd standard, s n\u00edm\u017e p\u0159ich\u00e1z\u00ed do styku nap\u0159\u00edklad z\u00e1me\u010dn\u00edci a \u00fadr\u017eb\u00e1\u0159i.Protahovac\u00ed trny slou\u017e\u00ed v\u00fdhradn\u011b pro s\u00e9riovou v\u00fdrobu obrobk\u016f, v nich\u017e je zapot\u0159eb\u00ed zhotovit vnit\u0159n\u00ed otvory, kter\u00e9 by nebylo mo\u017en\u00e9 zhotovit jin\u00fdmi n\u00e1stroji, a pokud ano, tak velmi obt\u00ed\u017en\u011b a zdlouhav\u011b. Jde nap\u0159\u00edklad o otvory v pr\u016f\u0159ezu ve tvaru \u010dtverce, troj\u00faheln\u00edka, lichob\u011b\u017en\u00edka, \u010detn\u00fdch mnoho\u00faheln\u00edk\u016f, a tak\u00e9 otvory nepravideln\u00e9, s r\u016fzn\u00fdmi k\u0159ivkami. Typick\u00fdm v\u00fdrobkem protahovac\u00edch trn\u016f s\u00e9riov\u00e9 v\u00fdroby jsou vlo\u017eky pro kl\u00ed\u010de do patentn\u00edch z\u00e1mk\u016f. Protahovac\u00ed trny jsou velmi drah\u00e9 a mus\u00ed se zaplatit s\u00e9riovou v\u00fdrobouD\u00edky tomu, \u017ee jde o velk\u00e9 s\u00e9rie obrobk\u016f, je pak mo\u017en\u00e9 jednak zaplatit pom\u011brn\u011b drah\u00fd n\u00e1stroj, a z\u00e1rove\u0148 umo\u017enit razantn\u00ed sn\u00ed\u017een\u00ed ceny obr\u00e1b\u011bn\u00e9ho materi\u00e1lu. Kdyby toti\u017e protahovac\u00ed trny neexistovaly, a museli bychom nap\u0159\u00edklad vlo\u017eky do z\u00e1mk\u016f zhotovovat obt\u00ed\u017en\u00fdm odvrt\u00e1v\u00e1n\u00edm a brou\u0161en\u00edm, co\u017e by bylo t\u00e9m\u011b\u0159 nemo\u017en\u00e9, cena vlo\u017eek by stoupla z n\u011bkolika des\u00edtek korun na des\u00edtky tis\u00edc korun.Protahovac\u00ed trny jsou ur\u010den\u00e9 pro obr\u00e1b\u011bn\u00ed v\u011bt\u0161iny kovov\u00fdch materi\u00e1l\u016f, zejm\u00e9na konstruk\u010dn\u00ed a legovan\u00e9 oceli, mosazi, bronz\u016f, titanu \u010di slitin hlin\u00edku. Zhotovuj\u00ed se z n\u00e1strojov\u00e9 rychlo\u0159ezn\u00e9 oceli, s ozna\u010den\u00edm HSS a jak u\u017e bylo \u0159e\u010deno, jde zpravidla o n\u00e1stroj vyr\u00e1b\u011bn\u00fd doslova na m\u00edru pro speci\u00e1ln\u00ed \u00fa\u010dely a po\u010dty obrobk\u016f ve stovk\u00e1ch, tis\u00edc\u00edch a desetitis\u00edc\u00edch kus\u016f. V ka\u017ed\u00e9m p\u0159\u00edpad\u011b pat\u0159\u00ed tyto n\u00e1stroje ke st\u00e1lic\u00edm stroj\u00edrensk\u00e9ho oboru a bude tomu tak pravd\u011bpodobn\u011b i nad\u00e1le, proto\u017ee dosud neexistuje n\u00e1hrada, kter\u00e1 by je v n\u011bkter\u00fdch p\u0159\u00edpadech dok\u00e1zala pln\u011b zastoupit.                                                                                                                                                                                                                                                                                                                                                                                          4.4\/5 - (10 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Protahovac\u00ed trny pat\u0159\u00ed k nejdra\u017e\u0161\u00edm stroj\u00edrensk\u00fdm n\u00e1stroj\u016fm","item":"https:\/\/www.terosat.cz\/protahovaci-trny-patri-k-nejdrazsim-strojirenskym-nastrojum\/#breadcrumbitem"}]}]