[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.itpce.cz\/protahovaci-trn-pro-vyrobu-tvarovych-drazek\/#Article","mainEntityOfPage":"https:\/\/www.itpce.cz\/protahovaci-trn-pro-vyrobu-tvarovych-drazek\/","headline":"Protahovac\u00ed trn pro v\u00fdrobu tvarov\u00fdch dr\u00e1\u017eek","name":"Protahovac\u00ed trn pro v\u00fdrobu tvarov\u00fdch dr\u00e1\u017eek","description":"Protahovac\u00ed trny znaj\u00ed lid\u00e9 ji\u017e od po\u010d\u00e1tku stroj\u00edrensk\u00e9 v\u00fdroby, kter\u00e1 svou epochu zapo\u010dala ji\u017e v prvn\u00ed polovin\u011b dvac\u00e1t\u00e9ho stolet\u00ed. Staly se sou\u010d\u00e1st\u00ed vybaven\u00ed stroj\u00edrensk\u00fdch provoz\u016f a st\u011b\u017e\u00ed se bez nich obejde i sou\u010dasn\u00fd stroj\u00edrensk\u00fd sv\u011bt, kde p\u0159evl\u00e1daj\u00ed CNC stroje.Protahovac\u00ed trn I – n\u00e1stroje vznikl kv\u016fli usnadn\u011bn\u00ed pr\u00e1ce p\u0159i v\u00fdrob\u011b otvor\u016f, p\u0159\u00edpadn\u011b vn\u011bj\u0161\u00edch ploch, je\u017e nemaj\u00ed […]","datePublished":"2020-01-05","dateModified":"2023-05-26","author":{"@type":"Person","@id":"https:\/\/www.itpce.cz\/author\/devene\/#Person","name":"devene","url":"https:\/\/www.itpce.cz\/author\/devene\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/dcb1aeb5e7d95014cdc92e76cf3c72f6b456579bf773ad0081803a6569ffc19c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/dcb1aeb5e7d95014cdc92e76cf3c72f6b456579bf773ad0081803a6569ffc19c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"itpce.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.itpce.cz\/wp-content\/uploads\/img_a373719_w1736_t1585139081.jpg","url":"https:\/\/www.itpce.cz\/wp-content\/uploads\/img_a373719_w1736_t1585139081.jpg","height":0,"width":0},"url":"https:\/\/www.itpce.cz\/protahovaci-trn-pro-vyrobu-tvarovych-drazek\/","about":["PC"],"wordCount":408,"articleBody":"        Protahovac\u00ed trny znaj\u00ed lid\u00e9 ji\u017e od po\u010d\u00e1tku stroj\u00edrensk\u00e9 v\u00fdroby, kter\u00e1 svou epochu zapo\u010dala ji\u017e v prvn\u00ed polovin\u011b dvac\u00e1t\u00e9ho stolet\u00ed. Staly se sou\u010d\u00e1st\u00ed vybaven\u00ed stroj\u00edrensk\u00fdch provoz\u016f a st\u011b\u017e\u00ed se bez nich obejde i sou\u010dasn\u00fd stroj\u00edrensk\u00fd sv\u011bt, kde p\u0159evl\u00e1daj\u00ed CNC stroje.Protahovac\u00ed trn I – n\u00e1stroje vznikl kv\u016fli usnadn\u011bn\u00ed pr\u00e1ce p\u0159i v\u00fdrob\u011b otvor\u016f, p\u0159\u00edpadn\u011b vn\u011bj\u0161\u00edch ploch, je\u017e nemaj\u00ed kruhov\u00fd pr\u016f\u0159ez. Zpravidla jde o r\u016fzn\u00e9 dr\u00e1\u017eky obd\u00e9ln\u00edkov\u00e9ho pr\u016f\u0159ezu, ale t\u00edmto zp\u016fsobem lze realizovat i otvory v pr\u016f\u0159ezu k\u0159ivky, lichob\u011b\u017en\u00edka \u010di mnoho\u00faheln\u00edka. Kdybychom zhotoven\u00ed takov\u00fdch ploch museli vytv\u00e1\u0159et nap\u0159\u00edklad fr\u00e9zov\u00e1n\u00edm nebo hoblov\u00e1n\u00edm, produktivita pr\u00e1ce a rentabilita by zdaleka nedosahovala \u00farovn\u011b, kterou lze doc\u00edlit pr\u00e1v\u011b t\u011bmito n\u00e1stroji. V \u010dem spo\u010d\u00edv\u00e1 pr\u00e1ce s protahovac\u00edm trnem Princip protahov\u00e1n\u00ed je i v sou\u010dasn\u00e9 dob\u011b shodn\u00fd s technologick\u00fdm principem zn\u00e1m\u00fdm ji\u017e des\u00edtky let. Obr\u00e1b\u011bn\u00e9 kusy jsou pevn\u011b upnuty a n\u00e1stroj vykon\u00e1v\u00e1 p\u0159\u00edmo\u010dar\u00fd jednosm\u011brn\u00fd pohyb ve stroji, je\u017e se naz\u00fdv\u00e1 \u201eprotahova\u010dka\u201c. K obr\u00e1b\u011bn\u00ed kovov\u00fdch sou\u010d\u00e1stek je nutn\u00fd hydraulick\u00fd pohon vzhledem k vyv\u00edjen\u00fdm zna\u010dn\u00fdm sil\u00e1m a velk\u00e9mu mechanick\u00e9mu t\u0159en\u00ed. N\u00e1stroj sest\u00e1v\u00e1 z mnoha zub\u016f s ost\u0159\u00edm, kter\u00e9 jsou odstup\u0148ovan\u00e9 podle velikosti, a ka\u017ed\u00fd z nich odeb\u00edr\u00e1 z obrobku t\u0159\u00edsku tak, \u017ee posledn\u00ed \u201ezub\u201c je fin\u00e1ln\u00edm procesem cel\u00e9 operace. Existuj\u00ed tak\u00e9 trny protla\u010dovac\u00ed, kter\u00e9 nejsou ta\u017eeny, ale naopak tla\u010deny sm\u011brem do obrobku, a z d\u016fvodu p\u016fsoben\u00ed zna\u010dn\u00e9 tlakov\u00e9 s\u00edly na cel\u00fd n\u00e1stroj je nutn\u00e9 zkr\u00e1tit jejich d\u00e9lku.  Uplatn\u00ed se jak v kusov\u00e9, tak i v s\u00e9riov\u00e9 v\u00fdrob\u011b, kde doch\u00e1z\u00ed k t\u0159\u00edskov\u00e9mu obr\u00e1b\u011bn\u00ed. V\u011bt\u0161inou se v\u0161ak vyu\u017e\u00edvaj\u00ed p\u0159i v\u00fdrob\u011b obrobk\u016f velk\u00fdch s\u00e9ri\u00ed vzhledem k tomu, \u017ee se jedn\u00e1 o n\u00e1stroj pom\u011brn\u011b drah\u00fd a velmi specifick\u00fd. T\u00edm se odli\u0161uje nap\u0159. od soustru\u017enick\u00e9ho no\u017ee, jeho\u017e vyu\u017eit\u00ed je univerz\u00e1ln\u00ed, a t\u00edm p\u00e1dem vhodn\u00e9 pro obr\u00e1b\u011bn\u00ed obrovsk\u00e9ho mno\u017estv\u00ed r\u016fzn\u00fdch variabiln\u00edch v\u00fdrobk\u016f.                                                                                                                                                                                                                                                                                                                                                                                                  "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Protahovac\u00ed trn pro v\u00fdrobu tvarov\u00fdch dr\u00e1\u017eek","item":"https:\/\/www.itpce.cz\/protahovaci-trn-pro-vyrobu-tvarovych-drazek\/#breadcrumbitem"}]}]