[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.bretong.cz\/jake-zname-maticove-zavitniky\/#Article","mainEntityOfPage":"https:\/\/www.bretong.cz\/jake-zname-maticove-zavitniky\/","headline":"Jak\u00e9 zn\u00e1me maticov\u00e9 z\u00e1vitn\u00edky?","name":"Jak\u00e9 zn\u00e1me maticov\u00e9 z\u00e1vitn\u00edky?","description":"Z\u00e1vitn\u00edk, jak ji\u017e jeho n\u00e1zev napov\u00edd\u00e1, se pou\u017e\u00edv\u00e1 pro vytvo\u0159en\u00ed z\u00e1vit\u016f ve v\u00e1lcov\u00e9m otvoru v materi\u00e1lu. Bu\u010f se pou\u017e\u00edv\u00e1 trojice nebo jeden jedin\u00fd nazvan\u00fd strojn\u00ed, co\u017e je ale mo\u017enost vyu\u017e\u00edvan\u00e1 sp\u00ed\u0161e v pr\u016fmyslov\u00e9 v\u00fdrob\u011b. Trojice t\u011bchto n\u00e1stroj\u016f se d\u00e1vaj\u00ed tak, aby zab\u00edrali 60, 30 a posledn\u00ed 10 % materi\u00e1lu. Podle pot\u0159ebn\u00e9ho druhu z\u00e1vitu rozli\u0161ujeme metrick\u00fd...","datePublished":"2020-09-30","dateModified":"2023-05-03","author":{"@type":"Person","@id":"https:\/\/www.bretong.cz\/author\/#Person","name":"","url":"https:\/\/www.bretong.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/01173f1da90dde8adb887d6793fa4e42c4004e53f8d645d9b1cb57c2dee8e188?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/01173f1da90dde8adb887d6793fa4e42c4004e53f8d645d9b1cb57c2dee8e188?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"bretong.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.bretong.cz\/wp-content\/uploads\/pexels-photo-442154.jpeg","url":"https:\/\/www.bretong.cz\/wp-content\/uploads\/pexels-photo-442154.jpeg","height":0,"width":0},"url":"https:\/\/www.bretong.cz\/jake-zname-maticove-zavitniky\/","about":["Produkty"],"wordCount":468,"articleBody":" Z\u00e1vitn\u00edk, jak ji\u017e jeho n\u00e1zev napov\u00edd\u00e1, se pou\u017e\u00edv\u00e1 pro vytvo\u0159en\u00ed z\u00e1vit\u016f ve v\u00e1lcov\u00e9m otvoru v materi\u00e1lu. Bu\u010f se pou\u017e\u00edv\u00e1 trojice nebo jeden jedin\u00fd nazvan\u00fd strojn\u00ed, co\u017e je ale mo\u017enost vyu\u017e\u00edvan\u00e1 sp\u00ed\u0161e v pr\u016fmyslov\u00e9 v\u00fdrob\u011b. Trojice t\u011bchto n\u00e1stroj\u016f se d\u00e1vaj\u00ed tak, aby zab\u00edrali 60, 30 a posledn\u00ed 10 % materi\u00e1lu.Podle pot\u0159ebn\u00e9ho druhu z\u00e1vitu rozli\u0161ujeme metrick\u00fd (M), whitworth (W), trubkov\u00fd (G), panc\u00e9\u0159ov\u00fd (Pg), unifikovan\u00fd (UNC), obl\u00fd a trap\u00e9zov\u00fd z\u00e1vitn\u00edk. Pr\u016fm\u011br ka\u017ed\u00e9ho z\u00e1vituje dan\u00fd normou, jeho stoup\u00e1n\u00ed je bu\u010f z\u00e1kladn\u00ed nebo jemn\u00e9, takt\u00e9\u017e je upraven\u00e9 normou. M\u016f\u017ee b\u00fdt bu\u010f prav\u00fd nebo lev\u00fd, podle toho co dan\u00e9mu \u010dlov\u011bku v\u00edce vyhovuje. Ten prav\u00fd se montuje ot\u00e1\u010den\u00edm ve sm\u011bru hodinov\u00fdch ru\u010di\u010dek, lev\u00fd ve sm\u011bru opa\u010dn\u00e9m.Z\u00e1vitn\u00edk m\u016f\u017ee b\u00fdt ru\u010dn\u00ed nebo strojn\u00ed. Ru\u010dn\u00ed obsahuje sadu zm\u00edn\u011bn\u00fdch t\u0159\u00ed kus\u016f (u druhu s jemn\u00fdm stoup\u00e1n\u00edm dva kusy), kter\u00e9 jsou univerz\u00e1ln\u00ed a hod\u00ed se tedy pro r\u016fzn\u00e9 typy otvor\u016f. Strojn\u00ed dok\u00e1\u017ee vytvo\u0159it z\u00e1vit b\u011bhem jedn\u00e9 jedin\u00e9 operace, co\u017e \u0161et\u0159\u00ed \u010das i n\u00e1mahu. Lze jej rozd\u011blit do n\u011bkolika dal\u0161\u00edch podskupin:Maticov\u00fd (pro kr\u00e1tk\u00e9 otvory),s rovnou dr\u00e1\u017ekou pro odvod t\u0159\u00edsek (pro slep\u00e9 i pr\u016fchoz\u00ed otvory),s dr\u00e1\u017ekou do \u0161roubovice (nejvhodn\u011bj\u0161\u00ed pro hlubok\u00e9 slep\u00e9 d\u00edry),s lama\u010dem (nejvhodn\u011bj\u0161\u00ed pro pr\u016fchoz\u00ed d\u00edry).P\u0159i v\u00fdb\u011bru materi\u00e1lu m\u016f\u017eeme narazit na n\u011bkolik mo\u017enost\u00ed:N\u00e1strojov\u00e1 ocel (NO) slou\u017e\u00ed pro protahov\u00e1n\u00ed z\u00e1vit\u016f u men\u0161\u00ed kusov\u00e9 v\u00fdroby.Rychlo\u0159ezn\u00e1 (HSS, HSSE) p\u0159edstavuje v\u00fdrazn\u011b tvrd\u0161\u00ed a pevn\u011bj\u0161\u00ed materi\u00e1l, kter\u00fd je vhodn\u00fd do s\u00e9riov\u00e9 v\u00fdroby strojn\u00edho z\u00e1vitov\u00e1n\u00ed.HSSE s povlakem, kter\u00fd ve v\u011bt\u0161in\u011b p\u0159\u00edpad\u016f tvo\u0159\u00ed nitrid titanu. Ten zvy\u0161uje odolnost a \u017eivotnost ost\u0159\u00ed za\u0159\u00edzen\u00ed, \u010d\u00edm\u017e skv\u011ble zapad\u00e1 do s\u00e9riov\u00e9 v\u00fdroby tvrd\u0161\u00edch materi\u00e1l\u016f.Tvrdokov pak p\u0159edstavuje nejtvrd\u0161\u00ed materi\u00e1l z oceli, na kter\u00fd m\u016f\u017eeme narazit.P\u0159i volb\u011b spr\u00e1vn\u00e9ho typu z\u00e1vitn\u00edku mus\u00edme zohlednit tak\u00e9 druh obr\u00e1b\u011bn\u00e9ho materi\u00e1lu. Takov\u00e9 parametry jako d\u00e9lka n\u00e1b\u011bhu, profil, povrchov\u00e1 \u00faprava a podobn\u00e9 jsou toti\u017e velmi d\u016fle\u017eit\u00e9.P\u0159i pr\u00e1ci s jednotliv\u00fdmi typy je pak t\u0159eba myslet na to, \u017ee p\u0159i \u0159ez\u00e1n\u00ed jednotliv\u00fdch z\u00e1vit\u016f je t\u0159eba pou\u017e\u00edvat \u0159ezn\u00fd olej. \u010c\u00edm v\u00edce je tento olej kvalitn\u011bj\u0161\u00ed, t\u00edm pohodln\u011bj\u0161\u00ed je pr\u00e1ce a tak\u00e9 \u017eivotnost n\u00e1stroje. 5\/5 - (1 vote) "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Jak\u00e9 zn\u00e1me maticov\u00e9 z\u00e1vitn\u00edky?","item":"https:\/\/www.bretong.cz\/jake-zname-maticove-zavitniky\/#breadcrumbitem"}]}]