{"id":2205,"date":"2021-04-27T03:36:41","date_gmt":"2021-04-27T03:36:41","guid":{"rendered":"https:\/\/pj4iaixa9m.wpdns.site\/?p=2205"},"modified":"2021-08-12T07:25:18","modified_gmt":"2021-08-12T07:25:18","slug":"an-introduction-to-the-calculation-of-punching-force-and-punching-pressure-center","status":"publish","type":"post","link":"https:\/\/www.harslepress.com\/cs\/an-introduction-to-the-calculation-of-punching-force-and-punching-pressure-center\/","title":{"rendered":"\u00davod do v\u00fdpo\u010dtu d\u011brovac\u00ed s\u00edly a st\u0159ed d\u011brovac\u00edho tlaku"},"content":{"rendered":"<p>P\u0159edpokl\u00e1dan\u00e1 doba \u010dten\u00ed: 13 minut<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-punching-force-and-its-reduction-measures\"><strong><a href=\"https:\/\/www.harsle.com\/J23-Inclinable-Punching-Machine-pd6320164.html\" target=\"_blank\" rel=\"noopener\">D\u011brov\u00e1n\u00ed<\/a> s\u00edla a jej\u00ed reduk\u010dn\u00ed opat\u0159en\u00ed<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-1-calculation-of-blanking-force\"><strong>1. V\u00fdpo\u010det <a href=\"https:\/\/www.harsle.com\/J23-Inclinable-Punching-Machine-pd6320164.html\" target=\"_blank\" rel=\"noopener\">zatemn\u011bn\u00ed<\/a> platnost<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Razic\u00ed s\u00edla je vyv\u00edjena razn\u00edkem na plech b\u011bhem procesu d\u011brov\u00e1n\u00ed a je to jeden z d\u016fle\u017eit\u00fdch faktor\u016f pro v\u00fdb\u011br lisu a konstrukci formy. V pr\u016fb\u011bhu procesu vysek\u00e1v\u00e1n\u00ed se velikost vysek\u00e1vac\u00ed s\u00edly neust\u00e1le m\u011bn\u00ed, jak je zn\u00e1zorn\u011bno na obr\u00e1zku 1-1. \u0158ez OA na obr\u00e1zku je f\u00e1z\u00ed elastick\u00e9 deformace a \u0159ezn\u00e1 s\u00edla na plech se zvy\u0161uje line\u00e1rn\u011b s tlakem razn\u00edku sm\u011brem dol\u016f. \u0158ez AB je f\u00e1z\u00ed plastick\u00e9 deformace. Bod B je maxim\u00e1ln\u00ed hodnota d\u011brovac\u00ed s\u00edly. P\u0159i op\u011btovn\u00e9m stla\u010den\u00ed razn\u00edku se v materi\u00e1lu tvo\u0159\u00ed trhliny a rychle se roztahuj\u00ed a d\u011brovac\u00ed s\u00edla kles\u00e1, tak\u017ee BC je st\u00e1dium lomu. P\u0159i dosa\u017een\u00ed bodu C se horn\u00ed a spodn\u00ed trhliny p\u0159ekr\u00fdvaj\u00ed a plech je odd\u011blen. Tlak, kter\u00fd CD pou\u017e\u00edv\u00e1, slou\u017e\u00ed pouze k p\u0159ekon\u00e1n\u00ed t\u0159ec\u00edho odporu a vytla\u010den\u00ed separovan\u00e9ho materi\u00e1lu. S\u00edla vysek\u00e1v\u00e1n\u00ed se vztahuje k maxim\u00e1ln\u00edmu odporu listov\u00e9ho materi\u00e1lu na razn\u00edku. Kdy\u017e listov\u00fd materi\u00e1l p\u016fsob\u00ed na lisovn\u00edk tak, \u017ee vytv\u00e1\u0159\u00ed maxim\u00e1ln\u00ed odpor a vytv\u00e1\u0159\u00ed trhliny (bod B na obr\u00e1zku 1-1), pou\u017eije se smyk v z\u00f3n\u011b smykov\u00e9 deformace plo\u0161n\u00e9ho materi\u00e1lu jako pevnost materi\u00e1lu ve smyku (MPa).<\/p>\n\n\n\n<figure><img decoding=\"async\" src=\"https:\/\/www.harslepress.com\/wp-content\/uploads\/2021\/04\/\u56fe1-1-1.jpg\" alt=\"\" \/><figcaption>Obr\u00e1zek 1-1 Zm\u011bna k\u0159ivky d\u011brovac\u00ed s\u00edly<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Pro <a href=\"https:\/\/www.harsle.com\/Punching-Machine.html\" target=\"_blank\" rel=\"noopener\">zatemn\u011bn\u00ed<\/a> s b\u011b\u017en\u00fdmi ploch\u00fdmi \u010depelemi lze zaslepovac\u00ed s\u00edlu F vypo\u010d\u00edtat podle n\u00e1sleduj\u00edc\u00edho vzorce.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><p>F=KLt\u03c4<sub>b<\/sub><\/p><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ve vzorci F-d\u011brovac\u00ed s\u00edla;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2014d\u00e9lka d\u011brovac\u00ed periferie;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">t \u2014 tlou\u0161\u0165ka materi\u00e1lu;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">b\u2014 pevnost materi\u00e1lu ve smyku;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">K\u2014-Koeficient. Koeficient K je korek\u010dn\u00ed koeficient, kter\u00fd zohled\u0148uje vliv faktor\u016f jako je kol\u00eds\u00e1n\u00ed a nerovnom\u011brnost hodnoty mezery formy, opot\u0159eben\u00ed b\u0159itu, mechanick\u00e9 vlastnosti plechu a kol\u00eds\u00e1n\u00ed tlou\u0161\u0165ky p\u0159i skute\u010dn\u00e9 v\u00fdrob\u011b. Obecn\u011b plat\u00ed, \u017ee K=1,3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Obecn\u011b plat\u00ed, \u017ee pevnost v tahu materi\u00e1lu \u03c3<sub>b<\/sub>= 1,3 \u03c4b. Pro usnadn\u011bn\u00ed v\u00fdpo\u010dtu lze s\u00edlu d\u011brov\u00e1n\u00ed vypo\u010d\u00edtat tak\u00e9 podle n\u00e1sleduj\u00edc\u00edho vzorce.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><p>F = Lt\u03c3<sub>b<\/sub><\/p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>2. Opat\u0159en\u00ed ke sn\u00ed\u017een\u00ed zaslepovac\u00ed s\u00edly<\/strong><strong><\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159i d\u011brov\u00e1n\u00ed vysokopevnostn\u00edch materi\u00e1l\u016f nebo siln\u00fdch materi\u00e1l\u016f a obrobk\u016f s velk\u00fdmi rozm\u011bry je pot\u0159ebn\u00e1 d\u011brovac\u00ed s\u00edla v\u011bt\u0161\u00ed, kter\u00e1 p\u0159esahuje jmenovit\u00fd tlak zvolen\u00e9ho za\u0159\u00edzen\u00ed. Ke sn\u00ed\u017een\u00ed d\u011brovac\u00ed s\u00edly se b\u011b\u017en\u011b pou\u017e\u00edvaj\u00ed n\u00e1sleduj\u00edc\u00ed metody.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Krokov\u00fd \u00fader <a href=\"https:\/\/www.harsle.com\/Punching-Machine.html\" target=\"_blank\" rel=\"noopener\">d\u011brov\u00e1n\u00ed<\/a><\/strong><\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ve v\u00edced\u011brn\u00e9 form\u011b mohou b\u00fdt vyrobeny r\u016fzn\u00e9 v\u00fd\u0161ky podle velikosti razn\u00edku, tak\u017ee pracovn\u00ed \u010deln\u00ed plochy jsou uspo\u0159\u00e1d\u00e1ny ve stup\u0148ovit\u00e9m tvaru. Jak je zn\u00e1zorn\u011bno na obr\u00e1zku 1-2.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Princip sni\u017eov\u00e1n\u00ed s\u00edly stup\u0148ovit\u00e9ho d\u011brov\u00e1n\u00ed spo\u010d\u00edv\u00e1 v tom, \u017ee zabra\u0148uje sou\u010dasn\u00e9mu d\u011brov\u00e1n\u00ed n\u011bkolika d\u011brova\u010d\u016f, \u010d\u00edm\u017e se zabra\u0148uje sou\u010dasn\u00e9mu v\u00fdskytu maxim\u00e1ln\u00ed d\u011brovac\u00ed s\u00edly v\u00edce d\u011brova\u010d\u016f, \u010d\u00edm\u017e se sni\u017euje celkov\u00e1 d\u011brovac\u00ed s\u00edla.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00fd\u0161kov\u00fd rozd\u00edl H mezi razn\u00edky z\u00e1vis\u00ed na tlou\u0161\u0165ce materi\u00e1lu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tenk\u00fd materi\u00e1l: kdy\u017e t&lt;3 mm, H=t;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tlou\u0161\u0165ka materi\u00e1lu: kdy\u017e t&gt;3 mm, H=0,5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159i pou\u017eit\u00ed stup\u0148ovit\u00e9ho pr\u016fbojn\u00edku by m\u011bl b\u00fdt tenk\u00fd pr\u016fbojn\u00edk co nejkrat\u0161\u00ed, co\u017e je v\u00fdhodn\u00e9 pro jeho pevnost; krom\u011b toho by m\u011bl b\u00fdt razn\u00edk uspo\u0159\u00e1d\u00e1n pokud mo\u017eno symetricky, aby se zabr\u00e1nilo vych\u00fdlen\u00ed formy. Krokov\u00e9 d\u011brov\u00e1n\u00ed m\u016f\u017ee sn\u00ed\u017eit d\u011brovac\u00ed s\u00edlu, sn\u00ed\u017eit vibrace, ani\u017e by to ovlivnilo p\u0159esnost obrobku, a zabr\u00e1nit naklon\u011bn\u00ed a zlomen\u00ed mal\u00e9ho razn\u00edku, kter\u00fd je bl\u00edzko velk\u00e9ho razn\u00edku. Kdy\u017e maj\u00ed v\u0161echny razn\u00edky stejnou v\u00fd\u0161ku, mal\u00fd razn\u00edk, kter\u00fd je bl\u00edzko k velk\u00e9mu razn\u00edku, je ovlivn\u011bn tokem materi\u00e1lu zp\u016fsoben\u00fdm velk\u00fdm razn\u00edkem a je snadn\u00e9 mal\u00fd razn\u00edk naklonit nebo zlomit. Nev\u00fdhodou tohoto zp\u016fsobu je, \u017ee dlouh\u00e1 konvexn\u00ed forma se vkl\u00e1d\u00e1 hloub\u011bji do konk\u00e1vn\u00ed formy, co\u017e se snadno opot\u0159ebov\u00e1v\u00e1 a je obt\u00ed\u017en\u00e9 ost\u0159it ost\u0159\u00ed. Pou\u017e\u00edv\u00e1 se hlavn\u011b pro formy s v\u00edce konvexn\u00edmi formami a relativn\u011b symetrick\u00fdmi polohami.<\/p>\n\n\n\n<figure><img decoding=\"async\" src=\"https:\/\/www.harslepress.com\/wp-content\/uploads\/2021\/04\/\u56fe1-2.jpg\" alt=\"\" \/><figcaption>Obr\u00e1zek 1-2 D\u011brov\u00e1n\u00ed zarovnan\u00e9ho razn\u00edku<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">D\u011brovac\u00ed s\u00edla stup\u0148ovit\u00e9ho razn\u00edku se obecn\u011b vypo\u010d\u00edt\u00e1v\u00e1 pouze podle stupn\u011b, kter\u00fd vytv\u00e1\u0159\u00ed nejv\u011bt\u0161\u00ed d\u011brovac\u00ed s\u00edlu.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong><a href=\"https:\/\/www.harsle.com\/Punching-Machine.html\" target=\"_blank\" rel=\"noopener\">Zatemn\u011bn\u00ed<\/a> se \u0161ikmou \u010depel\u00ed<\/strong><\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ploch\u00fdm st\u0159\u00edh\u00e1n\u00edm se m\u00e1 sou\u010dasn\u011b d\u011brovat materi\u00e1l po cel\u00e9m obvodu \u0159ezn\u00e9 hrany, tak\u017ee d\u011brovac\u00ed s\u00edla je pom\u011brn\u011b velk\u00e1. Pokud je rovina \u0159ezn\u00e9 hrany lisovn\u00edku (nebo matrice) vyrobena v naklon\u011bn\u00e9 rovin\u011b, kter\u00e1 nen\u00ed kolm\u00e1 ke sm\u011bru pohybu, nebude \u0159ezn\u00e1 hrana p\u0159i d\u011brov\u00e1n\u00ed sou\u010dasn\u011b v kontaktu s obvodem z\u00e1\u0159ezov\u00e9ho d\u00edlu, ale bude postupn\u00fdm od\u0159ez\u00e1v\u00e1n\u00edm materi\u00e1lu, co\u017e m\u016f\u017ee v\u00fdrazn\u011b sn\u00ed\u017eit d\u011brovac\u00ed s\u00edlu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pro d\u011brov\u00e1n\u00ed se \u0161ikm\u00fdmi \u010depelemi, aby se z\u00edskaly ploch\u00e9 d\u00edly, by m\u011bl b\u00fdt razn\u00edk p\u0159i vysek\u00e1v\u00e1n\u00ed ploch\u00fd a konk\u00e1vn\u00ed forma by m\u011bla b\u00fdt \u0161ikm\u00e1 \u010depel. P\u0159i d\u011brov\u00e1n\u00ed by m\u011bla b\u00fdt konk\u00e1vn\u00ed matrice ploch\u00e1 a d\u011brova\u010d by m\u011bla b\u00fdt \u0161ikm\u00e1 \u010depel. \u0160ikm\u00e9 \u010depele by m\u011bly b\u00fdt rovn\u011b\u017e uspo\u0159\u00e1d\u00e1ny symetricky, aby se zabr\u00e1nilo posunut\u00ed matrice v d\u016fsledku jednosm\u011brn\u00e9ho bo\u010dn\u00edho tlaku p\u0159i d\u011brov\u00e1n\u00ed a okusov\u00e1n\u00ed ost\u0159\u00ed. Tvary b\u0159it\u016f r\u016fzn\u00fdch \u0161ikm\u00fdch b\u0159it\u016f jsou zn\u00e1zorn\u011bny na obr\u00e1zku 1-3.<\/p>\n\n\n\n<figure><img decoding=\"async\" src=\"https:\/\/www.harslepress.com\/wp-content\/uploads\/2021\/04\/\u56fe1-3.jpg\" alt=\"\" \/><figcaption>Obr\u00e1zek 1-3 R\u016fzn\u00e9 formy \u0161ikm\u00fdch lopatek<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Obr\u00e1zek 1-3 ukazuje hodnotu v\u00fd\u0161ky H naklon\u011bn\u00e9 lopatky. Kdy\u017e je tlou\u0161\u0165ka materi\u00e1lu t&lt;3mm, H=2t; kdy\u017e tlou\u0161\u0165ka materi\u00e1lu t=3~10mm, H=t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00fdpo\u010dtov\u00fd vzorec \u0159ezn\u00e9 s\u00edly \u0161ikm\u00e9 \u010depele je<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><p>F <sub>\u0161ikm\u00fd <\/sub>= K<sub>&nbsp;\u0161ikm\u00fd<\/sub>&nbsp;Lt\u03c4<\/p><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ve vzorci F<sub>&nbsp;\u0161ikm\u00fd<\/sub>&nbsp;\u2014- zaslepovac\u00ed s\u00edla \u0161ikm\u00e9 \u010depele;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">K <sub>\u0161ikm\u00fd<\/sub>&nbsp;\u2014- parametr redukce s\u00edly, jeho hodnota souvis\u00ed s v\u00fd\u0161kou H \u0161ikm\u00e9 lopatky. Kdy\u017e H=1, K<sub>&nbsp;sklon<\/sub>=0,4~0,6; kdy\u017e H=2 t, K<sub>&nbsp;\u0161ikm\u00fd<\/sub>=0.2~0.4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00fdhodou \u0161ikm\u00e9ho vysek\u00e1v\u00e1n\u00ed \u010depele je, \u017ee lis m\u016f\u017ee pracovat v m\u011bkk\u00fdch podm\u00ednk\u00e1ch. Kdy\u017e jsou z\u00e1slepky velk\u00e9, s\u00edla se v\u00fdrazn\u011b sn\u00ed\u017e\u00ed. Nev\u00fdhodou je, \u017ee forma je slo\u017eit\u00e1 na v\u00fdrobu, b\u0159it se snadno opot\u0159ebov\u00e1v\u00e1 a obt\u00ed\u017en\u011b se brous\u00ed. Z\u00e1slepky nejsou dostate\u010dn\u011b ploch\u00e9 a nejsou vhodn\u00e9 pro z\u00e1slepky slo\u017eit\u00fdch tvar\u016f. Proto se je obecn\u011b sna\u017ete nepou\u017e\u00edvat a pou\u017e\u00edvejte je pouze na velk\u00e9 lisovac\u00ed d\u00edly nebo tlust\u00e9 plechy Blanking.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159i pou\u017eit\u00ed \u0161ikm\u00e9ho d\u011brov\u00e1n\u00ed \u010depel\u00ed nebo d\u011brov\u00e1n\u00ed stup\u0148ovit\u00fdm d\u011brov\u00e1n\u00edm, p\u0159esto\u017ee je d\u011brovac\u00ed s\u00edla sn\u00ed\u017eena, razn\u00edk vstoup\u00ed do \u010dtvrt\u00e9 formy hloub\u011bji a zdvih d\u011brov\u00e1n\u00ed se zv\u00fd\u0161\u00ed, tak\u017ee tyto formy \u0161et\u0159\u00ed n\u00e1mahu a \u017e\u00e1dnou n\u00e1mahu.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Teplo <a href=\"https:\/\/www.harsle.com\/J23-Inclinable-Punching-Machine-pd6320164.html\" target=\"_blank\" rel=\"noopener\">d\u011brov\u00e1n\u00ed<\/a> (\u010derven\u00e9 d\u011brov\u00e1n\u00ed)<\/strong><\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Zatemn\u011bn\u00ed zah\u0159\u00edv\u00e1n\u00ed se tak\u00e9 naz\u00fdv\u00e1 \u010derven\u00e9 zaslepen\u00ed. Kov m\u00e1 ur\u010ditou pevnost ve smyku p\u0159i pokojov\u00e9 teplot\u011b, ale kdy\u017e se kovov\u00fd materi\u00e1l zah\u0159eje na ur\u010ditou teplotu, jeho pevnost ve smyku se v\u00fdrazn\u011b sn\u00ed\u017e\u00ed, tak\u017ee zah\u0159\u00edv\u00e1n\u00ed a d\u011brov\u00e1n\u00ed m\u016f\u017ee sn\u00ed\u017eit s\u00edlu d\u011brov\u00e1n\u00ed (kovov\u00fd materi\u00e1l zah\u0159ejte na 700 ~ 900 \u2103, d\u011brovac\u00ed s\u00edla je pouze 1\/3 norm\u00e1ln\u00ed teploty nebo je\u0161t\u011b m\u00e9n\u011b).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00fdhodou oh\u0159evu blankingu je, \u017ee se v\u00fdrazn\u011b sn\u00ed\u017e\u00ed s\u00edla, ale nev\u00fdhodou je, \u017ee oh\u0159evem se snadno vytvo\u0159\u00ed hydrogenovan\u00e1 k\u016f\u017ee a po\u0161kod\u00ed se kvalita povrchu obrobku; a kv\u016fli zah\u0159\u00edv\u00e1n\u00ed jsou pracovn\u00ed podm\u00ednky \u0161patn\u00e9. Topn\u00e9 st\u0159\u00edh\u00e1n\u00ed se obecn\u011b pou\u017e\u00edv\u00e1 pro st\u0159\u00edh\u00e1n\u00ed siln\u00fdch materi\u00e1l\u016f a st\u0159\u00edh\u00e1n\u00ed obrobk\u016f s n\u00edzkou toleranc\u00ed.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>3. V\u00fdpo\u010det v\u00fdtla\u010dn\u00e9 s\u00edly, p\u0159\u00edtla\u010dn\u00e9 s\u00edly a vyhazovac\u00ed s\u00edly<\/strong><strong><\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159i d\u011brov\u00e1n\u00ed doch\u00e1z\u00ed p\u0159ed odd\u011blen\u00edm materi\u00e1lu k elastick\u00e9 deformaci. Na konci d\u011brov\u00e1n\u00ed se v d\u016fsledku pru\u017en\u00e9ho zotaven\u00ed materi\u00e1lu a existence t\u0159en\u00ed v\u00fdst\u0159i\u017eky nebo odpad z d\u011brov\u00e1n\u00ed zablokuj\u00ed v matrici a zb\u00fdvaj\u00edc\u00ed materi\u00e1l se vyst\u0159ihne. Pevn\u011b obru\u010d na \u0161\u00eddlu. Aby bylo mo\u017en\u00e9 pokra\u010dovat v d\u011brov\u00e1n\u00ed, mus\u00ed b\u00fdt materi\u00e1l na d\u011brova\u010di vylo\u017een a materi\u00e1l uv\u00edzl\u00fd v matrici mus\u00ed b\u00fdt vytla\u010den. S\u00edla pot\u0159ebn\u00e1 k vylo\u017een\u00ed materi\u00e1lu obru\u010de z razn\u00edku se naz\u00fdv\u00e1 vykl\u00e1dac\u00ed s\u00edla F<sub>&nbsp;vylo\u017eeno<\/sub>; s\u00edla, kter\u00e1 tla\u010d\u00ed obrobek nebo odpad\u00e1 ze sm\u011bru d\u011brov\u00e1n\u00ed z matrice, se naz\u00fdv\u00e1 s\u00edla F<sub>tam<\/sub>. S\u00edla pot\u0159ebn\u00e1 k tomu, aby byl obrobek nebo odpad vymr\u0161t\u011bn proti sm\u011bru d\u011brov\u00e1n\u00ed, se naz\u00fdv\u00e1 vyhazovac\u00ed s\u00edla F <sub>horn\u00ed<\/sub>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Je obt\u00ed\u017en\u00e9 p\u0159esn\u011b vypo\u010d\u00edtat tyto s\u00edly. Ve v\u00fdrob\u011b se b\u011b\u017en\u011b pou\u017e\u00edvaj\u00ed n\u00e1sleduj\u00edc\u00ed empirick\u00e9 vzorce.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><p>F <sub>vylo\u017eit<\/sub>=K <sub>vylo\u017eit<\/sub>&nbsp;F<\/p><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><p>F push = nK push F<\/p><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><p>F top=K top<\/p><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ve vzorci F \u2014 s\u00edla d\u011brov\u00e1n\u00ed;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">F<sub>&nbsp;vykl\u00e1d\u00e1n\u00ed<\/sub>, F <sub>tla\u010den\u00ed<\/sub>, F<sub>&nbsp;horn\u00ed<\/sub>\u2014-vykl\u00e1dac\u00ed s\u00edla, tla\u010dn\u00e1 s\u00edla, vyhazovac\u00ed s\u00edla;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">K <sub>vykl\u00e1d\u00e1n\u00ed<\/sub>, K <sub>tla\u010den\u00ed<\/sub>, K<sub>&nbsp;horn\u00ed<\/sub>\u2014-v\u00fdtla\u010dn\u00e1 s\u00edla, tla\u010dn\u00e1 s\u00edla, sou\u010dinitel s\u00edly vyhazova\u010de, viz tabulka 1-4;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">n\u2014-Po\u010det z\u00e1\u0159ez\u016f (nebo \u00fatr\u017ek\u016f) zaseknut\u00fdch v matrici sou\u010dasn\u011b.<\/p>\n\n\n\n<figure><table><tbody><tr><td>Tlou\u0161\u0165ka materi\u00e1lu (mm)<\/td><td>K <sub>vykl\u00e1d\u00e1n\u00ed<\/sub><\/td><td>K <sub>tla\u010den\u00ed<\/sub><\/td><td>K<sub>&nbsp;horn\u00ed<\/sub><\/td><td>&nbsp;<\/td><\/tr><tr><td>Ocel<\/td><td>\u22640,1<\/td><td>0.06~0.09<\/td><td>0.1<\/td><td>0.14<\/td><\/tr><tr><td>&nbsp;<\/td><td>&gt;0,1~0,5<\/td><td>0.04~0.07<\/td><td>0.065<\/td><td>0.08<\/td><\/tr><tr><td>&nbsp;<\/td><td>&gt;0,5~2,5<\/td><td>0.025~0.06<\/td><td>0.05<\/td><td>0.06<\/td><\/tr><tr><td>&nbsp;<\/td><td>&gt;2,5~6,5<\/td><td>0.02~0.05<\/td><td>0.045<\/td><td>0.05<\/td><\/tr><tr><td>&nbsp;<\/td><td>&gt;6.5<\/td><td>0.015~0.04<\/td><td>0.025<\/td><td>0.03<\/td><\/tr><tr><td>\u010cerven\u00e1 m\u011b\u010f<\/td><td>Mosaz<\/td><td>0.02~0.06<\/td><td>0.03~0.09<\/td><td>0.03~0.09<\/td><\/tr><tr><td>Hlin\u00edk<\/td><td>Slitina hlin\u00edku<\/td><td>0.03~0.08<\/td><td>0.03~0.07<\/td><td>0.03~0.07<\/td><\/tr><\/tbody><\/table><figcaption><br>Tabulka 1-4 Vykl\u00e1dac\u00ed s\u00edla, tla\u010dn\u00e1 s\u00edla, koeficient s\u00edly vyhazova\u010de<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Pozn\u00e1mka: Koeficient odleh\u010dovac\u00ed s\u00edly K se pou\u017e\u00edv\u00e1 p\u0159i vykl\u00e1d\u00e1n\u00ed otvor\u016f, velk\u00fdch hran a slo\u017eit\u00fdch obrys\u016f, vezm\u011bte horn\u00ed limit.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><p>n=h\/t<\/p><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ve vzorci h \u2014 v\u00fd\u0161ka rovn\u00e9 hrany st\u011bny dutiny dutiny;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">t\u2014-Tlou\u0161\u0165ka plechu.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>4. Stanoven\u00ed jmenovit\u00e9ho tlaku lisu<\/strong><strong><\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Vykl\u00e1dac\u00ed s\u00edla, tla\u010dn\u00e1 s\u00edla a vyhazovac\u00ed s\u00edla jsou p\u0159en\u00e1\u0161eny lisem a vykl\u00e1dac\u00edm za\u0159\u00edzen\u00edm formy nebo vyhazovac\u00edm za\u0159\u00edzen\u00edm. Proto by se p\u0159i v\u00fdb\u011bru jmenovit\u00e9ho tlaku za\u0159\u00edzen\u00ed nebo p\u0159i n\u00e1vrhu matrice m\u011blo uva\u017eovat samostatn\u011b.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159i d\u011brov\u00e1n\u00ed mus\u00ed b\u00fdt jmenovit\u00fd tlak lisu v\u011bt\u0161\u00ed nebo roven sou\u010dtu r\u016fzn\u00fdch sil F procesu d\u011brov\u00e1n\u00ed<sub>celkov\u00fd<\/sub>. Celkov\u00fd v\u00fdpo\u010det F by m\u011bl b\u00fdt zpracov\u00e1n odd\u011blen\u011b podle r\u016fzn\u00fdch struktur formy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159i pou\u017eit\u00ed elastick\u00e9ho tlakov\u00e9ho vykl\u00e1dac\u00edho za\u0159\u00edzen\u00ed a formy s metodou spodn\u00edho vypou\u0161t\u011bn\u00ed,<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><p>F<sub>&nbsp;celkov\u00fd<\/sub>==F+F <sub>vykl\u00e1d\u00e1n\u00ed<\/sub>+F <sub>tla\u010den\u00ed<\/sub><\/p><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159i pou\u017eit\u00ed elastick\u00e9ho tlakov\u00e9ho vykl\u00e1dac\u00edho za\u0159\u00edzen\u00ed a formy s metodou horn\u00edho vypou\u0161t\u011bn\u00ed,<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><p>F<sub>&nbsp;celkov\u00fd<\/sub>==F+F <sub>vykl\u00e1d\u00e1n\u00ed<\/sub>+F <sub>tla\u010den\u00ed<\/sub><\/p><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159i pou\u017eit\u00ed pevn\u00e9ho vykl\u00e1dac\u00edho za\u0159\u00edzen\u00ed a formy s metodou spodn\u00edho vypou\u0161t\u011bn\u00ed,<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><p>F<sub>&nbsp;celkov\u00fd <\/sub>= F + F <sub>tam<\/sub><\/p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>V\u00fdpo\u010det <a href=\"https:\/\/www.harsle.com\/J23-Inclinable-Punching-Machine-pd6320164.html\" target=\"_blank\" rel=\"noopener\">zatemn\u011bn\u00ed<\/a> tlakov\u00e9 centrum<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">St\u0159ed tlaku formy je m\u00edstem p\u016fsoben\u00ed v\u00fdsledn\u00e9 s\u00edly lisovac\u00ed s\u00edly. St\u0159ed tlaku formy se mus\u00ed shodovat se st\u0159edovou osou p\u0159\u00edtla\u010dn\u00e9ho jezdce proch\u00e1zej\u00edc\u00ed osou rukojeti formy. V opa\u010dn\u00e9m p\u0159\u00edpad\u011b bude jezdec b\u011bhem lisov\u00e1n\u00ed vystaven excentrick\u00e9mu zat\u00ed\u017een\u00ed, co\u017e bude m\u00edt za n\u00e1sledek abnorm\u00e1ln\u00ed opot\u0159eben\u00ed vodic\u00ed li\u0161ty jezdce a vodic\u00ed \u010d\u00e1sti formy a nebude zaru\u010dena p\u0159im\u011b\u0159en\u00e1 mezera, co\u017e ovlivn\u00ed kvalitu d\u00edl\u016f a sn\u00ed\u017e\u00ed \u017eivotnost pl\u00edsn\u00ed, a dokonce pl\u00edse\u0148 po\u0161kodit.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>1. Ur\u010den\u00ed st\u0159edu tlaku jednoduch\u00fdch geometrick\u00fdch \u00fatvar\u016f<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>St\u0159ed tlaku p\u0159\u00edmky se nach\u00e1z\u00ed ve st\u0159edu p\u0159\u00edmky.<\/strong><\/li><\/ul>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>St\u0159ed tlaku symetrick\u00e9ho z\u00e1\u0159ezov\u00e9ho d\u00edlu se nach\u00e1z\u00ed na geometrick\u00e9m st\u0159edu obrysov\u00e9ho obrazce z\u00e1\u0159ezov\u00e9ho d\u00edlu.<\/strong><\/li><\/ul>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>P\u0159i d\u011brov\u00e1n\u00ed segmentu obloukov\u00e9 \u010d\u00e1ry se poloha st\u0159edu tlaku, jak je zn\u00e1zorn\u011bno na obr\u00e1zku 1-5, vypo\u010d\u00edt\u00e1v\u00e1 podle n\u00e1sleduj\u00edc\u00edho vzorce.<\/strong><\/li><\/ul>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><p>X<sub>\u00d3<\/sub>&nbsp;= 180 Rsina\/\u03c0a = Rb\/l<\/p><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Zde l\u2014-d\u00e9lka oblouku.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00fdznamy dal\u0161\u00edch symbol\u016f jsou zn\u00e1zorn\u011bny na obr\u00e1zku 1-5.<\/p>\n\n\n\n<figure><img decoding=\"async\" src=\"https:\/\/www.harslepress.com\/wp-content\/uploads\/2021\/04\/\u56fe1-5.jpg\" alt=\"\" \/><figcaption>Obr\u00e1zek 1-5 St\u0159ed tlaku segmentu obloukov\u00e9 \u010d\u00e1ry<\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>2. Ur\u010den\u00ed st\u0159edu tlaku v\u00edced\u011brovac\u00ed formy<\/strong><strong><\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">K ur\u010den\u00ed st\u0159edu tlaku u v\u00edced\u011brovac\u00ed formy je t\u0159eba ur\u010dit st\u0159ed tlaku ka\u017ed\u00e9ho razn\u00edku a potom vypo\u010d\u00edtat st\u0159ed tlaku formy. Obr\u00e1zek 1-6 ukazuje rozlo\u017een\u00ed polohy razn\u00edk\u016f pro d\u011brov\u00e1n\u00ed v\u00edce otvor\u016f. Kroky pro v\u00fdpo\u010det st\u0159edu tlaku jsou n\u00e1sleduj\u00edc\u00ed.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong><strong>Nakreslete polohu obrysu okraje ka\u017ed\u00e9 raznice podle m\u011b\u0159\u00edtka.<\/strong><\/strong><\/li><\/ul>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Nakreslete sou\u0159adnou osu x, y v libovoln\u00e9 poloze. <\/strong>P\u0159i volb\u011b polohy sou\u0159adnicov\u00e9 osy se sna\u017ete vz\u00edt po\u010d\u00e1tek sou\u0159adnic jako tlakov\u00fd st\u0159ed ur\u010dit\u00e9ho obrysu hrany, nebo aby sou\u0159adnicov\u00e1 osa co nejv\u00edce proch\u00e1zela st\u0159edem tlaku obrysu hrany razn\u00edku. Po\u010d\u00e1tek sou\u0159adnic by m\u011bl b\u00fdt p\u0159ednostn\u011b n\u011bkolik hran pr\u016fbojn\u00edku. St\u0159ed symetrie tlakov\u00e9ho st\u0159edu profilu \u00fast, co\u017e m\u016f\u017ee probl\u00e9m zjednodu\u0161it.<\/li><\/ul>\n\n\n\n<figure><img decoding=\"async\" src=\"https:\/\/www.harslepress.com\/wp-content\/uploads\/2021\/04\/\u56fe1-6.jpg\" alt=\"\" \/><figcaption>Obr\u00e1zek 1-6 St\u0159ed tlaku p\u0159i v\u00edcen\u00e1sobn\u00e9m d\u011brov\u00e1n\u00ed<\/figcaption><\/figure>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Vypo\u010d\u00edtejte st\u0159ed tlaku a sou\u0159adnice x<\/strong><strong><sub>1<\/sub><\/strong><strong>, X<\/strong><strong><sub>2<\/sub><\/strong><strong>\u2026X<\/strong><strong><sub>n<\/sub><\/strong><strong>&nbsp;a y<\/strong><strong><sub>1<\/sub><\/strong><strong>, y<\/strong><strong><sub>2<\/sub><\/strong><strong>\u2026y<\/strong><strong><sub>n<\/sub><\/strong><strong>&nbsp;p\u0159\u00edslu\u0161n\u011b obrysu hrany razn\u00edku.<\/strong><strong><\/strong><\/li><li><strong>Vypo\u010d\u00edtejte d\u011brovac\u00ed s\u00edlu F<\/strong><strong><sub>1<\/sub><\/strong><strong>, F<\/strong><strong><sub>2<\/sub><\/strong><strong>\u2026F<\/strong><strong><sub>n<\/sub><\/strong><strong>&nbsp;obrysu hrany razidla a obvodu L<\/strong><strong><sub>1<\/sub><\/strong><strong>, L<\/strong><strong><sub>2<\/sub><\/strong><strong>\u2026L<\/strong><strong><sub>n<\/sub><\/strong><strong>&nbsp;ka\u017ed\u00e9ho obrysu hrany razidla.<\/strong><strong><\/strong><\/li><\/ul>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><p>F<sub>1<\/sub>=KL<sub>1<\/sub>t<sub>b<\/sub><\/p><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><p>F<sub>2<\/sub>=KL<sub>2<\/sub>t<sub>b<\/sub><\/p><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><p>&#8230;<\/p><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><p>F<sub>n<\/sub>=KL<sub>n<\/sub>t<sub>b<\/sub><\/p><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pro paraleln\u00ed silov\u00fd syst\u00e9m je v\u00fdsledn\u00e1 s\u00edla zaslepovac\u00ed s\u00edly rovna algebraick\u00e9mu sou\u010dtu sil. Tedy F=F<sub>1<\/sub>+F<sub>2<\/sub>+\u2026+F<sub>n<\/sub>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Podle v\u011bty mechaniky je moment v\u00fdsledn\u00e9 s\u00edly na ur\u010dit\u00e9 ose roven algebraick\u00e9mu sou\u010dtu slo\u017eek p\u016fsob\u00edc\u00edch na souos\u00fd moment, pak lze z\u00edskat vzorec pro v\u00fdpo\u010det sou\u0159adnic tlakov\u00e9ho st\u0159edu.<\/p>\n\n\n\n<figure><img decoding=\"async\" src=\"https:\/\/www.harslepress.com\/wp-content\/uploads\/2021\/04\/\u4e24\u4e2a\u7b97\u5f0f.jpg\" alt=\"\" width=\"400\" height=\"184\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00e1hradn\u00edk F<sub>1<\/sub>, F<sub>2<\/sub>\u2026F<sub>n<\/sub>&nbsp;do v\u00fd\u0161e uveden\u00e9ho vzorce, potom se sou\u0159adnice st\u0159edu tlaku stanou<\/p>\n\n\n\n<figure><img decoding=\"async\" src=\"https:\/\/www.harslepress.com\/wp-content\/uploads\/2021\/04\/\u7b2c\u4e8c\u4e2a\u7b97\u5f0f.jpg\" alt=\"\" width=\"400\" height=\"96\" \/><\/figure>\n\n\n\n<figure><img decoding=\"async\" src=\"https:\/\/www.harslepress.com\/wp-content\/uploads\/2021\/04\/\u7b2c\u4e09\u4e2a\u7b97\u5f0f.jpg\" alt=\"\" width=\"400\" height=\"90\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>3. Ur\u010den\u00ed st\u0159edu tlaku formy tvarov\u011b slo\u017eit\u00fdch d\u00edl\u016f<\/strong><strong><\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Kdy\u017e <a href=\"https:\/\/www.harsle.com\/J23-Inclinable-Punching-Machine-pd6320164.html\" target=\"_blank\" rel=\"noopener\">d\u011brov\u00e1n\u00ed<\/a> u slo\u017eit\u011b tvarovan\u00fdch d\u00edl\u016f je princip v\u00fdpo\u010dtu tlakov\u00e9ho centra z\u00e1pustky stejn\u00fd jako u v\u00edcen\u00e1sobn\u00e9ho lisovac\u00edho lisovac\u00edho centra, jak je zn\u00e1zorn\u011bno na obr\u00e1zku 1-7. Konkr\u00e9tn\u00ed kroky jsou n\u00e1sleduj\u00edc\u00ed.<\/p>\n\n\n\n<figure><img decoding=\"async\" src=\"https:\/\/www.harslepress.com\/wp-content\/uploads\/2021\/04\/\u56fe1-7.jpg\" alt=\"\" \/><figcaption>Obr\u00e1zek 1-7 St\u0159ed tlaku slo\u017eit\u00e9ho zast\u0159ihovac\u00edho d\u00edlu<\/figcaption><\/figure>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Vyberte osu sou\u0159adnic x a osu sou\u0159adnic y v libovoln\u00e9m m\u00edst\u011b obrysu hrany.<\/strong><\/li><\/ul>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Rozd\u011blte obrysovou \u010d\u00e1ru \u0159ezn\u00e9 hrany na n\u011bkolik jednoduch\u00fdch \u00fase\u010dek podle z\u00e1kladn\u00edch prvk\u016f a zjist\u011bte d\u00e9lku ka\u017ed\u00e9 \u00fase\u010dky L<sub>1<\/sub>, L<sub>2<\/sub>\u2026L<sub>n<\/sub>.<\/strong><\/li><\/ul>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Ur\u010dete polohu t\u011b\u017ei\u0161t\u011b x<sub>1<\/sub>, X<sub>2<\/sub>\u2026X<sub>n<\/sub>&nbsp;a y<sub>1<\/sub>, y<sub>2<\/sub>\u2026y<sub>n<\/sub>&nbsp;ka\u017ed\u00e9ho segmentu \u010d\u00e1ry.<\/strong><\/li><\/ul>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Vypo\u010d\u00edtejte sou\u0159adnice st\u0159edu tlaku (x<\/strong><strong><sub>0<\/sub><\/strong><strong>, y<\/strong><strong><sub>0<\/sub><\/strong><strong>) okrajov\u00e9ho profilu podle vzorce.<\/strong><strong><\/strong><\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Pro stanoven\u00ed st\u0159edu tlaku vysek\u00e1vac\u00edho lisu lze krom\u011b v\u00fd\u0161e uveden\u00e9 analytick\u00e9 metody pou\u017e\u00edt tak\u00e9 jako metodu ta\u017een\u00ed a z\u00e1v\u011bsnou metodu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Metoda kreslen\u00ed je stejn\u00e1 jako metoda analytick\u00e1. Dok\u00e1\u017ee naj\u00edt st\u0159ed tlaku d\u011brov\u00e1n\u00ed pomoc\u00ed v\u00edce razn\u00edk\u016f a st\u0159ed tlaku d\u011brov\u00e1n\u00ed tvarov\u011b slo\u017eit\u00fdch d\u00edl\u016f. P\u0159esnost metody kreslen\u00ed v\u0161ak nen\u00ed vysok\u00e1 a metoda nen\u00ed jednoduch\u00e1, tak\u017ee aplikace podl\u00e9h\u00e1 ur\u010dit\u00fdm omezen\u00edm.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ve v\u00fdrob\u011b se metoda zav\u011b\u0161en\u00ed \u010dasto pou\u017e\u00edv\u00e1 k ur\u010den\u00ed st\u0159edu tlaku slo\u017eit\u00fdch st\u0159\u00edhac\u00edch d\u00edl\u016f. Pou\u017eijte stejnom\u011brn\u00e9 jemn\u00e9 kovov\u00e9 dr\u00e1ty k ohnut\u00ed pod\u00e9l obrysu d\u011brov\u00e1n\u00ed, abyste vytvo\u0159ili simulovan\u00fd d\u00edl, pot\u00e9 zav\u011bste simulovan\u00fd d\u00edl \u0161ic\u00ed nit\u00ed a nakreslete olovnici z bodu zav\u011b\u0161en\u00ed; pak vezm\u011bte dal\u0161\u00ed bod simulovan\u00e9 \u010d\u00e1sti a vytvo\u0159te dal\u0161\u00ed \u010d\u00e1st stejn\u00fdm zp\u016fsobem, svislou \u010d\u00e1ru, pr\u016fse\u010d\u00edk dvou svisl\u00fdch \u010dar ve st\u0159edu tlaku. Teoretick\u00fdm z\u00e1kladem metody zav\u011b\u0161en\u00ed je nahrazen\u00ed zaslepovac\u00ed s\u00edly rovnom\u011brn\u011b rozlo\u017een\u00e9 na obrysu <a href=\"https:\/\/www.harslepress.com\/cs\/product\/100t-punching-machine-steel-hinge-making-automatic-power-press-production-line-foil-container-making-machine\/\">zatemn\u011bn\u00ed<\/a> \u010d\u00e1st s homogenn\u00edm kovov\u00fdm dr\u00e1tem a t\u011b\u017ei\u0161t\u011bm simulovan\u00e9 \u010d\u00e1sti je tlakov\u00fd st\u0159ed st\u0159\u00edh\u00e1n\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"<p>Estimated reading time: 13 minutes Punching force and its reduction measures 1. Calculation of blanking force The punching force is<\/p>","protected":false},"author":4,"featured_media":2222,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[613,611,612],"class_list":["post-2205","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-punching-machine","tag-blanking-die","tag-blanking-force","tag-blanking-pressure-center"],"jetpack_featured_media_url":"https:\/\/www.harslepress.com\/wp-content\/uploads\/2021\/04\/The-Pressure-Centre-Of-A-Complex-Blanking-Part.jpg","_links":{"self":[{"href":"https:\/\/www.harslepress.com\/cs\/wp-json\/wp\/v2\/posts\/2205","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.harslepress.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.harslepress.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.harslepress.com\/cs\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.harslepress.com\/cs\/wp-json\/wp\/v2\/comments?post=2205"}],"version-history":[{"count":0,"href":"https:\/\/www.harslepress.com\/cs\/wp-json\/wp\/v2\/posts\/2205\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.harslepress.com\/cs\/wp-json\/wp\/v2\/media\/2222"}],"wp:attachment":[{"href":"https:\/\/www.harslepress.com\/cs\/wp-json\/wp\/v2\/media?parent=2205"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.harslepress.com\/cs\/wp-json\/wp\/v2\/categories?post=2205"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.harslepress.com\/cs\/wp-json\/wp\/v2\/tags?post=2205"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}