{"id":2772,"date":"2024-05-17T01:16:06","date_gmt":"2024-05-17T01:16:06","guid":{"rendered":"https:\/\/www.shen-chong.com\/?p=2772"},"modified":"2024-05-15T02:06:02","modified_gmt":"2024-05-15T02:06:02","slug":"what-are-the-k-factor-bend-allowance-and-bend-deduction","status":"publish","type":"post","link":"https:\/\/www.shen-chong.com\/cs\/what-are-the-k-factor-bend-allowance-and-bend-deduction\/","title":{"rendered":"Co je to faktor K, p\u0159\u00eddavek na ohyb a odpo\u010det ohybu?"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"2772\" class=\"elementor elementor-2772\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-81d1703 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"81d1703\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div 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.elementor-toc__list-item{counter-increment:item}ol.elementor-toc__list-wrapper .elementor-toc__list-item-text-wrapper:before{content:counters(item,\".\") \". \"}<\/style>\t\t<div class=\"elementor-toc__header\">\n\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tObsah\t\t\t<\/h4>\n\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__6ed7cdc\" aria-expanded=\"true\" aria-label=\"Otev\u0159\u00edt obsah\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div 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xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a6c9058 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a6c9058\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4160b3a\" data-id=\"4160b3a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d34b492 elementor-widget elementor-widget-heading\" data-id=\"d34b492\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 13-03-2024 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h2 class=\"elementor-heading-title elementor-size-default\">Zaveden\u00ed<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8394fb5 elementor-widget elementor-widget-text-editor\" data-id=\"8394fb5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 13-03-2024 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p>V\u00fdpo\u010det spr\u00e1vn\u00e9ho faktoru K, p\u0159\u00eddavku na ohyb a odpo\u010dtu ohybu je kl\u00ed\u010dov\u00fd pro z\u00edsk\u00e1n\u00ed kvalitn\u00edho hotov\u00e9ho d\u00edlu. <a href=\"https:\/\/www.shen-chong.com\/cs\/press-brake\/\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #3366ff;\"><strong><b>hydraulick\u00fd<\/b><\/strong><strong><b>\u00a0ohra\u0148ovac\u00ed lis<\/b><\/strong><\/span><\/a>Znalost a technika ohra\u0148ovac\u00edho lisu jsou jeho z\u00e1kladem, kter\u00fd je kl\u00ed\u010dov\u00fd pro jeho vyu\u017eit\u00ed ve v\u00fdrob\u011b.<\/p><p>V\u00fdpo\u010det d\u00e9lky rozvinu z 3D d\u00edlu ve skute\u010dnosti nen\u00ed tak slo\u017eit\u00fd. I kdy\u017e m\u016f\u017eete naj\u00edt n\u011bkolik r\u016fzn\u00fdch vzorc\u016f, kter\u00e9 \u00fadajn\u011b vypo\u010d\u00edtaj\u00ed p\u0159\u00eddavek na ohyb, obvykle se jedn\u00e1 o stejn\u00fd vzorec, pouze zjednodu\u0161en\u00fd vypln\u011bn\u00edm \u00fahlu nebo K-faktoru. Tento \u010dl\u00e1nek v\u00e1m uk\u00e1\u017ee tyto informace, v\u010detn\u011b K-faktoru, p\u0159\u00eddavku na ohyb a ode\u010dtu ohybu.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7f4fda3 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"7f4fda3\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 13-03-2024 *\/\n.elementor-widget-divider{--divider-border-style:none;--divider-border-width:1px;--divider-color:#0c0d0e;--divider-icon-size:20px;--divider-element-spacing:10px;--divider-pattern-height:24px;--divider-pattern-size:20px;--divider-pattern-url:none;--divider-pattern-repeat:repeat-x}.elementor-widget-divider .elementor-divider{display:flex}.elementor-widget-divider .elementor-divider__text{font-size:15px;line-height:1;max-width:95%}.elementor-widget-divider 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.elementor-divider-separator:after,.elementor-widget-divider--separator-type-pattern:not(.elementor-widget-divider--view-line) .elementor-divider-separator:before,.elementor-widget-divider--separator-type-pattern:not([class*=elementor-widget-divider--view]) .elementor-divider-separator{width:100%;min-height:var(--divider-pattern-height);-webkit-mask-size:var(--divider-pattern-size) 100%;mask-size:var(--divider-pattern-size) 100%;-webkit-mask-repeat:var(--divider-pattern-repeat);mask-repeat:var(--divider-pattern-repeat);background-color:var(--divider-color);-webkit-mask-image:var(--divider-pattern-url);mask-image:var(--divider-pattern-url)}.elementor-widget-divider--no-spacing{--divider-pattern-size:auto}.elementor-widget-divider--bg-round{--divider-pattern-repeat:round}.rtl .elementor-widget-divider .elementor-divider__text{direction:rtl}.e-con-inner>.elementor-widget-divider,.e-con>.elementor-widget-divider{width:var(--container-widget-width,100%);--flex-grow:var(--container-widget-flex-grow)}<\/style>\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-750fe14 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"750fe14\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-750c460\" data-id=\"750c460\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-90033e8 elementor-widget elementor-widget-heading\" data-id=\"90033e8\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Co je to p\u0159\u00eddavn\u00e1 hodnota ohybu?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-87c3f12 elementor-widget elementor-widget-text-editor\" data-id=\"87c3f12\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Kovy lze skute\u010dn\u011b oh\u00fdbat. P\u0159i v\u00fdrob\u011b plech\u016f je nutn\u00e9 kov oh\u00fdbat nejen proto, aby vytvo\u0159il ur\u010dit\u00fd tvar, ale tak\u00e9 proto, aby byly spln\u011bny bezpe\u010dnostn\u00ed p\u0159edpisy p\u0159i n\u00e1razu, aby se kov ohnul, nikoli zlomil. Bez ohledu na typ kovu, tvar a tlou\u0161\u0165ku kovu m\u00e1 ka\u017ed\u00fd kus kovu ur\u010dit\u00fd stupe\u0148 tolerance ohybu.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b9e7f19 elementor-widget elementor-widget-heading\" data-id=\"b9e7f19\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Definice p\u0159\u00eddavku na ohyb<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-19ca6f7 elementor-widget elementor-widget-text-editor\" data-id=\"19ca6f7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>P\u0159\u00eddavek na ohyb (BA) je d\u00e9lka oblouku ohybu m\u011b\u0159en\u00e1 pod\u00e9l neutr\u00e1ln\u00ed osy kovov\u00e9ho plechu, proto\u017ee d\u00e9lka neutr\u00e1ln\u00ed osy se po ohybu nem\u011bn\u00ed.<\/p><p>Jakmile je vypo\u010d\u00edt\u00e1n p\u0159\u00eddavek na ohyb, m\u011bl by b\u00fdt p\u0159ipo\u010dten k d\u00e9lce ploch\u00e9ho d\u00edlu, aby se ur\u010dila po\u017eadovan\u00e1 d\u00e9lka plechu pot\u0159ebn\u00e1 k vytvo\u0159en\u00ed po\u017eadovan\u00e9ho obrobku.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-08c7e4b elementor-widget elementor-widget-heading\" data-id=\"08c7e4b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Jak vypo\u010d\u00edtat p\u0159\u00eddavek na ohyb<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f807f41 elementor-widget elementor-widget-text-editor\" data-id=\"f807f41\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Jak je zn\u00e1zorn\u011bno na obr\u00e1zku n\u00ed\u017ee:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4921555 elementor-widget elementor-widget-image\" data-id=\"4921555\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 13-03-2024 *\/\n.elementor-widget-image{text-align:center}.elementor-widget-image a{display:inline-block}.elementor-widget-image a img[src$=\".svg\"]{width:48px}.elementor-widget-image img{vertical-align:middle;display:inline-block}<\/style>\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"650\" height=\"420\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-allowance.jpg\" class=\"attachment-full size-full wp-image-2775\" alt=\"p\u0159\u00eddavek na ohyb\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-allowance.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-allowance-300x194.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-allowance-18x12.jpg 18w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-900cc77 elementor-widget elementor-widget-text-editor\" data-id=\"900cc77\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Pro v\u00fdpo\u010det d\u00e9lky ploch\u00e9ho spoje se pou\u017e\u00edv\u00e1 n\u00e1sleduj\u00edc\u00ed vzorec:<\/p><p style=\"text-align: center;\"><span style=\"color: #0000ff;\"><strong><b>D\u00e9lka plechov\u00e9 desky<\/b><\/strong><strong><b>\u00a0<\/b><\/strong><strong><b>=<\/b><\/strong><strong><b>\u00a0<\/b><\/strong><strong><b>D\u00e9lka nohy 1 + z\u00e1da + d\u00e9lka nohy 2<\/b><\/strong><\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4f88e5f elementor-widget elementor-widget-heading\" data-id=\"4f88e5f\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Vzorec pro v\u00fdpo\u010det p\u0159\u00eddavku na ohyb<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2a9a157 elementor-widget elementor-widget-image\" data-id=\"2a9a157\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"265\" height=\"76\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-allowance-formula.jpg\" class=\"attachment-full size-full wp-image-2776\" alt=\"vzorec pro p\u0159\u00eddavky na ohyb\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-allowance-formula.jpg 265w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-allowance-formula-18x5.jpg 18w\" sizes=\"(max-width: 265px) 100vw, 265px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-610cbe6 elementor-widget elementor-widget-text-editor\" data-id=\"610cbe6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>A \u2013 \u00dahel ohybu<\/p><p>R \u2013 Vnit\u0159n\u00ed polom\u011br<\/p><p>K \u2013 K faktor<\/p><p>T \u2013 Tlou\u0161\u0165ka materi\u00e1lu<\/p><p>Za\u010dn\u011bme s jednoduch\u00fdm L-dr\u017e\u00e1kem. Obr\u00e1zek ukazuje, \u017ee nohy dr\u017e\u00e1ku jsou 2\u201d a 3\u201d. Tlou\u0161\u0165ka materi\u00e1lu je 0,125\u201d, vnit\u0159n\u00ed polom\u011br je 0,250\u201d a \u00fahel ohybu je 90 stup\u0148\u016f. D\u00e9lka v ploch\u00e9m stavu je sou\u010det d\u00e9lky ploch\u00fdch \u010d\u00e1st\u00ed obou p\u0159\u00edrub plus d\u00e9lka obloukem oblasti ohybu. Ale po\u010d\u00edt\u00e1te to na vnit\u0159n\u00ed stran\u011b materi\u00e1lu, nebo na vn\u011bj\u0161\u00ed? Ani jedno! Zde p\u0159ich\u00e1z\u00ed do hry K-faktor. K-faktor je procento tlou\u0161\u0165ky materi\u00e1lu, kde nedoch\u00e1z\u00ed k jeho natahov\u00e1n\u00ed ani stla\u010dov\u00e1n\u00ed, nap\u0159\u00edklad neutr\u00e1ln\u00ed osa. Pro tento jednoduch\u00fd L-dr\u017e\u00e1k pou\u017eiji K-faktor 0,42.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c1d3528 elementor-widget elementor-widget-image\" data-id=\"c1d3528\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"650\" height=\"196\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-allowance-calculation-case.jpg\" class=\"attachment-full size-full wp-image-2777\" alt=\"p\u0159\u00edpad v\u00fdpo\u010dtu p\u0159\u00eddavku na ohyb\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-allowance-calculation-case.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-allowance-calculation-case-300x90.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-allowance-calculation-case-18x5.jpg 18w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1e0d09b elementor-widget elementor-widget-text-editor\" data-id=\"1e0d09b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Pou\u017eit\u00edm v\u00fd\u0161e uveden\u00e9ho vzorce m\u00e1me: P\u0159\u00eddavek na ohyb = 90 * (\u03c0 \/ 180) * (0,250 + 0,42 * 0,125) = 0,475\u2033.<\/p><p>D\u00e9lka rozvinu je tedy 1,625\u201d + 2,625\u201d + 0,475\u2033, co\u017e se rovn\u00e1 4,725\u2033. Pokud tedy se\u010dtete rozvinutou d\u00e9lku v\u0161ech p\u0159\u00edrub a p\u0159id\u00e1te jeden p\u0159\u00eddavek na ohyb pro ka\u017edou oblast ohybu, z\u00edsk\u00e1te spr\u00e1vnou rozvinutou d\u00e9lku d\u00edlu.<\/p><p>Ale pod\u00edvejte se na v\u00fdkres. Takto obvykle ok\u00f3tujeme plechov\u00fd d\u00edl. K\u00f3ty jsou obvykle k pr\u016fse\u010d\u00edku p\u0159\u00edrub nebo linie formy. To znamen\u00e1, \u017ee pro ka\u017edou oblast ohybu mus\u00edme ode\u010d\u00edst dvojn\u00e1sobek tlou\u0161\u0165ky materi\u00e1lu plus polom\u011br ohybu (tak\u00e9 zn\u00e1m\u00fd jako odsazen\u00ed). Pro tuto sadu k\u00f3t by bylo snaz\u0161\u00ed vypo\u010d\u00edtat hodnotu kompenzace ohybu. Hodnota kompenzace ohybu umo\u017e\u0148uje se\u010d\u00edst d\u00e9lku ka\u017ed\u00e9 p\u0159\u00edruby pomoc\u00ed k\u00f3t linie formy a pot\u00e9 k celkov\u00e9mu sou\u010dtu p\u0159i\u010d\u00edst jednu kompenzaci ohybu na ka\u017edou oblast ohybu. Je to -0,275, co\u017e je z\u00e1porn\u00e9 \u010d\u00edslo, co\u017e znamen\u00e1, \u017ee tuto hodnotu ode\u010dtete od celkov\u00e9ho po\u010dtu d\u00e9lek p\u0159\u00edrub, 5&quot;, abyste z\u00edskali 4,725&quot;.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b08bd5a elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"b08bd5a\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8cf45d0 elementor-widget elementor-widget-heading\" data-id=\"8cf45d0\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Co je K-faktor?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0c3f990 elementor-widget elementor-widget-text-editor\" data-id=\"0c3f990\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>K-faktor je procento tlou\u0161\u0165ky materi\u00e1lu, kde nedoch\u00e1z\u00ed k jeho natahov\u00e1n\u00ed ani stla\u010dov\u00e1n\u00ed v oblasti ohybu.<\/p><p>\u010c\u00edm tvrd\u0161\u00ed je materi\u00e1l, t\u00edm men\u0161\u00ed je stla\u010den\u00ed na vnit\u0159n\u00ed stran\u011b ohybu. Proto je v\u011bt\u0161\u00ed rozta\u017een\u00ed na vn\u011bj\u0161\u00ed stran\u011b a neutr\u00e1ln\u00ed osa se posouv\u00e1 sm\u011brem dovnit\u0159 ohybu. M\u011bk\u010d\u00ed materi\u00e1ly umo\u017e\u0148uj\u00ed v\u011bt\u0161\u00ed stla\u010den\u00ed na vnit\u0159n\u00ed stran\u011b a neutr\u00e1ln\u00ed osa z\u016fst\u00e1v\u00e1 bl\u00ed\u017ee ke st\u0159edu tlou\u0161\u0165ky materi\u00e1lu.<\/p><p>Polom\u011br ohybu m\u00e1 podobn\u00fd \u00fa\u010dinek. \u010c\u00edm men\u0161\u00ed je polom\u011br ohybu, t\u00edm v\u011bt\u0161\u00ed je pot\u0159eba stla\u010den\u00ed a neutr\u00e1ln\u00ed osa se posouv\u00e1 sm\u011brem dovnit\u0159 ohybu. P\u0159i v\u011bt\u0161\u00edm polom\u011bru z\u016fst\u00e1v\u00e1 neutr\u00e1ln\u00ed osa bl\u00edzko st\u0159edu tlou\u0161\u0165ky materi\u00e1lu.<\/p><p>Abychom pochopili faktor K, mus\u00edme nejprve pochopit neutr\u00e1ln\u00ed osu.<\/p><p>P\u0159i oh\u00fdb\u00e1n\u00ed plechu se spodn\u00ed povrch stla\u010duje a horn\u00ed povrch se natahuje. Neutr\u00e1ln\u00ed osa se nach\u00e1z\u00ed uvnit\u0159 kovu, kde se plech ani nestla\u010duje, ani neroztahuje, co\u017e mu umo\u017e\u0148uje udr\u017eovat konstantn\u00ed d\u00e9lku.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e5f8cc3 elementor-widget elementor-widget-image\" data-id=\"e5f8cc3\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"650\" height=\"302\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/neutral-axis.jpg\" class=\"attachment-full size-full wp-image-2778\" alt=\"neutr\u00e1ln\u00ed osa\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/neutral-axis.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/neutral-axis-300x139.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/neutral-axis-18x8.jpg 18w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-79d2536 elementor-widget elementor-widget-heading\" data-id=\"79d2536\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Neutr\u00e1ln\u00ed osa<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6ba0839 elementor-widget elementor-widget-text-editor\" data-id=\"6ba0839\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Neutr\u00e1ln\u00ed osa se nem\u011bn\u00ed. P\u0159i vyv\u00edjen\u00ed ploch\u00e9ho polotovaru existuje d\u00e9lka d\u00edlu, kter\u00e1 se nem\u011bn\u00ed. Tato d\u00e9lka se naz\u00fdv\u00e1 neutr\u00e1ln\u00ed osa. Materi\u00e1l na vnit\u0159n\u00ed stran\u011b neutr\u00e1ln\u00ed osy se bude stla\u010dovat, zat\u00edmco materi\u00e1l na vn\u011bj\u0161\u00ed stran\u011b se bude natahovat. Pom\u011br stla\u010den\u00ed a nap\u011bt\u00ed v d\u00edlu se bude m\u011bnit v z\u00e1vislosti na tlou\u0161\u0165ce materi\u00e1lu, polom\u011bru tvaru a metod\u00e1ch tv\u00e1\u0159en\u00ed.<\/p><p>D\u00edl ohnut\u00fd o velmi ostr\u00fd polom\u011br se v porovn\u00e1n\u00ed s tlou\u0161\u0165kou v\u00edce nat\u00e1hne sm\u011brem ven, co\u017e znamen\u00e1, \u017ee neutr\u00e1ln\u00ed osa bude le\u017eet bl\u00ed\u017ee k vnit\u0159n\u00ed stran\u011b ohybu. D\u00edl oh\u00fdban\u00fd postupn\u011b bude m\u00edt men\u0161\u00ed vn\u011bj\u0161\u00ed nata\u017een\u00ed, co\u017e znamen\u00e1, \u017ee neutr\u00e1ln\u00ed osa bude le\u017eet bl\u00ed\u017ee ke st\u0159edu d\u00edlu.<\/p><p>U ploch\u00e9ho plechu je neutr\u00e1ln\u00ed osa rovnom\u011brn\u011b um\u00edst\u011bna v polovin\u011b tlou\u0161\u0165ky plechu, ale b\u011bhem oh\u00fdb\u00e1n\u00ed se bude pohybovat.<\/p><p>Zm\u011bna polohy neutr\u00e1ln\u00ed osy je ur\u010dena r\u016fzn\u00fdmi faktory, jako jsou vlastnosti materi\u00e1lu, tlou\u0161\u0165ka, \u00fahel ohybu, vnit\u0159n\u00ed polom\u011br a zp\u016fsob ohybu desky.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e692e9c elementor-widget elementor-widget-heading\" data-id=\"e692e9c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Jak vypo\u010d\u00edtat K faktory<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-342f0db elementor-widget elementor-widget-text-editor\" data-id=\"342f0db\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Matematicky K-faktor p\u0159edstavuje pom\u011br mezi polohou neutr\u00e1ln\u00ed osy (t) a tlou\u0161\u0165kou desky (T).<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1d64a0f elementor-widget elementor-widget-heading\" data-id=\"1d64a0f\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Vzorec pro v\u00fdpo\u010det K faktor\u016f<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f4a2f04 elementor-widget elementor-widget-image\" data-id=\"f4a2f04\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"193\" height=\"73\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/k-factor-calculation-formula.jpg\" class=\"attachment-full size-full wp-image-2779\" alt=\"Vzorec pro v\u00fdpo\u010det faktoru k\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/k-factor-calculation-formula.jpg 193w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/k-factor-calculation-formula-18x7.jpg 18w\" sizes=\"(max-width: 193px) 100vw, 193px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-41265b6 elementor-widget elementor-widget-text-editor\" data-id=\"41265b6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Kde t je vzd\u00e1lenost od vnit\u0159n\u00edho povrchu k neutr\u00e1ln\u00ed ose a T je tlou\u0161\u0165ka kovu.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6be4fc8 elementor-widget elementor-widget-image\" data-id=\"6be4fc8\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"650\" height=\"406\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/k-factor-formula.jpg\" class=\"attachment-full size-full wp-image-2780\" alt=\"Vzorec k-faktoru\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/k-factor-formula.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/k-factor-formula-300x187.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/k-factor-formula-18x12.jpg 18w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-370e84c elementor-widget elementor-widget-text-editor\" data-id=\"370e84c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>K-faktor je ur\u010den fyzik\u00e1ln\u00edmi vlastnostmi materi\u00e1lu, metodou oh\u00fdb\u00e1n\u00ed, \u00fahlem ohybu a dal\u0161\u00edmi faktory.<\/p><p>Hodnota faktor\u016f K bude v\u017edy mezi 0 a 1. Pokud je faktor ak 0,25, znamen\u00e1 to, \u017ee neutr\u00e1ln\u00ed osa se nach\u00e1z\u00ed v bod\u011b 25% tlou\u0161\u0165ky plechov\u00e9ho materi\u00e1lu sou\u010d\u00e1sti. Podobn\u011b, pokud je 0,5, znamen\u00e1 to, \u017ee neutr\u00e1ln\u00ed osa se nach\u00e1z\u00ed v bod\u011b 50% cel\u00e9 tlou\u0161\u0165ky.<\/p><p><strong><b>Vlastnosti materi\u00e1lu:<\/b><\/strong>\u00a0Obvykle se pohybuje mezi 0,30 a 0,50. Obecn\u011b je K-faktor m\u011bkk\u00e9 m\u011bdi nebo m\u011bkk\u00fdch m\u011bd\u011bn\u00fdch materi\u00e1l\u016f 0,35, K-faktor materi\u00e1l\u016f, jako je polotvrd\u00e1 m\u011b\u010f nebo mosaz, m\u011bkk\u00e1 ocel a hlin\u00edk, je 0,41 a K-faktor materi\u00e1l\u016f, jako je bronz, tvrd\u00e1 m\u011b\u010f, ocel v\u00e1lcovan\u00e1 za studena a pru\u017einov\u00e1 ocel, je 0,45.<\/p><p><strong><b>Polom\u011br ohybu: <\/b><\/strong>\u010d\u00edm men\u0161\u00ed je polom\u011br ohybu, t\u00edm v\u011bt\u0161\u00ed je K-faktor.<\/p><p><strong><b>Tlou\u0161\u0165ka materi\u00e1lu: <\/b><\/strong>\u010c\u00edm v\u011bt\u0161\u00ed je tlou\u0161\u0165ka materi\u00e1lu, t\u00edm v\u011bt\u0161\u00ed je K-faktor.<\/p><p><strong><b>Mez kluzu materi\u00e1lu:<\/b><\/strong>\u00a0\u010d\u00edm vy\u0161\u0161\u00ed je mez kluzu, t\u00edm men\u0161\u00ed je K-faktor.<\/p><p><strong><b>Modul pru\u017enosti (tak\u00e9 zn\u00e1m\u00fd jako Young\u016fv modul):<\/b><\/strong>\u00a0\u010c\u00edm v\u011bt\u0161\u00ed je tlou\u0161\u0165ka materi\u00e1lu, t\u00edm v\u011bt\u0161\u00ed je K-faktor.<\/p><p>P\u0159i p\u0159esn\u00e9 v\u00fdrob\u011b plech\u016f s pou\u017eit\u00edm <a href=\"https:\/\/www.shen-chong.com\/cs\/cnc-press-brake-machine\/\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #3366ff;\"><strong>CNC ohra\u0148ovac\u00ed lis<\/strong><\/span><\/a>, K-faktor je kl\u00ed\u010dov\u00fdm faktorem. K-faktor se pou\u017e\u00edv\u00e1 k v\u00fdpo\u010dtu ohybov\u00e9ho rozvinu, kter\u00fd p\u0159\u00edmo souvis\u00ed s d\u00e9lkou plechu nata\u017een\u00e9ho b\u011bhem oh\u00fdb\u00e1n\u00ed.<\/p><p>Je to z\u00e1kladn\u00ed hodnota pro stanoven\u00ed p\u0159\u00eddavku na ohyb a ode\u010dtu ohybu.<\/p><p>Proto\u017ee pom\u011br vzd\u00e1lenosti k neutr\u00e1ln\u00ed ose k tlou\u0161\u0165ce plechu ur\u010duje polohu neutr\u00e1ln\u00ed osy v kovov\u00e9m plechu, znalost K-faktoru pom\u00e1h\u00e1 ur\u010dit polohu neutr\u00e1ln\u00ed osy po ohybu.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-43164ec elementor-widget elementor-widget-heading\" data-id=\"43164ec\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">K faktory pro hlin\u00edk a ocel<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ac1ec40 elementor-widget elementor-widget-text-editor\" data-id=\"ac1ec40\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>K-faktor m\u016f\u017eete tak\u00e9 ur\u010dit pomoc\u00ed n\u00ed\u017ee uveden\u00e9 tabulky:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-54e439a elementor-widget elementor-widget-image\" data-id=\"54e439a\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"650\" height=\"432\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/k-factor-for-aluminum-and-steel.jpg\" class=\"attachment-full size-full wp-image-2781\" alt=\"k-faktor pro hlin\u00edk a ocel\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/k-factor-for-aluminum-and-steel.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/k-factor-for-aluminum-and-steel-300x199.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/k-factor-for-aluminum-and-steel-18x12.jpg 18w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b4650c3 elementor-widget elementor-widget-heading\" data-id=\"b4650c3\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">K faktory pro m\u011b\u010f, mosaz a bronz<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e2838a5 elementor-widget elementor-widget-text-editor\" data-id=\"e2838a5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Po pe\u010dliv\u00e9m prostudov\u00e1n\u00ed bylo zji\u0161t\u011bno, \u017ee syst\u00e9m SolidWorks tak\u00e9 nab\u00edz\u00ed algoritmy pro kompenzaci ohybu pro n\u00e1sleduj\u00edc\u00ed specifick\u00e9 materi\u00e1ly p\u0159i \u00fahlu ohybu 90 stup\u0148\u016f. Konkr\u00e9tn\u00ed v\u00fdpo\u010detn\u00ed vzorec je n\u00e1sleduj\u00edc\u00ed:<\/p><p>M\u011bkk\u00e1 mosaz nebo m\u011bkk\u00e1 m\u011b\u010f: BA=(0,55 * T)+(1,57 * R)<\/p><p>Materi\u00e1ly jako polotvrd\u00e1 m\u011b\u010f nebo mosaz, m\u011bkk\u00e1 ocel a hlin\u00edk: BA=(0,64 * T)+(1,57 * R) Materi\u00e1ly jako bronz, tvrd\u00e1 m\u011b\u010f, za studena v\u00e1lcovan\u00e1 ocel a pru\u017einov\u00e1 ocel: BA=(0,71 * T)+(1,57 * R) Pokud zjednodu\u0161\u00edme rovnici (7) a nastav\u00edme \u00fahel ohybu na 90 stup\u0148\u016f a vypo\u010d\u00edt\u00e1me konstantu, lze rovnici transformovat do podoby:<\/p><p>BA=(1,57 * K * T)+(1,57 * R)<\/p><p>Tak\u017ee pro m\u011bkk\u00e9 mosazn\u00e9 nebo m\u011bkk\u00e9 m\u011bd\u011bn\u00e9 materi\u00e1ly m\u016f\u017eeme porovn\u00e1n\u00edm v\u00fd\u0161e uveden\u00e9ho v\u00fdpo\u010dtov\u00e9ho vzorce z\u00edskat 1,57xK=0,55K=0,55\/1,57=0,35. Hodnoty k-faktoru pro n\u011bkolik typ\u016f materi\u00e1l\u016f uveden\u00fdch v knize lze snadno vypo\u010d\u00edtat stejnou metodou.<\/p><p>M\u011bkk\u00e1 mosaz nebo m\u011bkk\u00e1 m\u011b\u010f: K=0,35.<\/p><p>Materi\u00e1ly jako polotvrd\u00e1 m\u011b\u010f nebo mosaz, m\u011bkk\u00e1 ocel a hlin\u00edk: K=0,41.<\/p><p>Materi\u00e1ly jako bronz, tvrd\u00e1 m\u011b\u010f, za studena v\u00e1lcovan\u00e1 ocel a pru\u017einov\u00e1 ocel: K=0,45.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-46040d2 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"46040d2\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8b1fb88 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8b1fb88\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7e6bbb8\" data-id=\"7e6bbb8\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-bd5a701 elementor-widget elementor-widget-heading\" data-id=\"bd5a701\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Co je odpo\u010det ohybu?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-de42e94 elementor-widget elementor-widget-text-editor\" data-id=\"de42e94\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>P\u0159i oh\u00fdb\u00e1n\u00ed plech\u016f se v d\u016fsledku ne\u00fapln\u00e9 plastick\u00e9 deformace materi\u00e1lu a konstruk\u010dn\u00edch omezen\u00ed samotn\u00e9ho obr\u00e1b\u011bc\u00edho stroje m\u016f\u017ee \u00fahel a d\u00e9lka oh\u00fdban\u00e9ho obrobku odchylovat od navr\u017een\u00fdch rozm\u011br\u016f. Aby byla zaji\u0161t\u011bna p\u0159esnost oh\u00fdb\u00e1n\u00ed a velikost obrobku spl\u0148uj\u00edc\u00ed po\u017eadavky, je nutn\u00e9 p\u0159i v\u00fdrob\u011b v\u00fdkresu zohlednit odpo\u010det ohybu, tj. zmen\u0161it velikost ohybu, kter\u00fd je t\u0159eba prov\u00e9st.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-89e97f1 elementor-widget elementor-widget-heading\" data-id=\"89e97f1\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Definice odpo\u010dtu ohybu<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-035b4ef elementor-widget elementor-widget-text-editor\" data-id=\"035b4ef\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Ode\u010det ohybu je d\u00e9lka materi\u00e1lu, kterou mus\u00edme odebrat z celkov\u00e9 d\u00e9lky desky, abychom z\u00edskali spr\u00e1vn\u00fd rozvin.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-60ab50c elementor-widget elementor-widget-heading\" data-id=\"60ab50c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Princip ode\u010dtu ohybu<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-51bf74d elementor-widget elementor-widget-text-editor\" data-id=\"51bf74d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Princip ode\u010dtu ohybu spo\u010d\u00edv\u00e1 ve vyu\u017eit\u00ed elastick\u00e9 deformace materi\u00e1lu, aby d\u00e9lka a \u00fahel po ohybu spl\u0148ovaly konstruk\u010dn\u00ed po\u017eadavky. P\u0159i oh\u00fdb\u00e1n\u00ed se plech um\u00edst\u00ed na oh\u00fdbac\u00ed stroj, kter\u00fd aplikuje ohybovou s\u00edlu, kter\u00e1 zp\u016fsob\u00ed elastickou deformaci plechu, co\u017e m\u00e1 za n\u00e1sledek zm\u011bny tvaru a \u00fahlu a nakonec dosa\u017een\u00ed po\u017eadovan\u00e9ho tvaru. V tomto procesu lze ode\u010det ohybu p\u0159esn\u011b \u0159\u00eddit \u00fapravou velikosti v\u00fdkresu, \u010d\u00edm\u017e se dos\u00e1hne p\u0159esnosti a velikosti po\u017eadovan\u00e9 konstrukc\u00ed.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-163add4 elementor-widget elementor-widget-image\" data-id=\"163add4\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"650\" height=\"312\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-deduction-principle.jpg\" class=\"attachment-full size-full wp-image-2782\" alt=\"princip ode\u010dtu ohybu\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-deduction-principle.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-deduction-principle-300x144.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-deduction-principle-18x9.jpg 18w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8eeddbb elementor-widget elementor-widget-text-editor\" data-id=\"8eeddbb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Podle v\u00fd\u0161e uveden\u00e9ho obr\u00e1zku je odpo\u010det ohybu rozd\u00edl mezi p\u0159\u00eddavkem na ohyb a dvojn\u00e1sobkem vn\u011bj\u0161\u00edho odsazen\u00ed.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-85e39fc elementor-widget elementor-widget-heading\" data-id=\"85e39fc\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Vzorec pro v\u00fdpo\u010det ode\u010dtu ohybu<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aed427f elementor-widget elementor-widget-image\" data-id=\"aed427f\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"523\" height=\"76\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-deduction-formula.jpg\" class=\"attachment-full size-full wp-image-2783\" alt=\"vzorec pro odpo\u010det ohybu\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-deduction-formula.jpg 523w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-deduction-formula-300x44.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/05\/bend-deduction-formula-18x3.jpg 18w\" sizes=\"(max-width: 523px) 100vw, 523px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f6f7d86 elementor-widget elementor-widget-text-editor\" data-id=\"f6f7d86\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Kde:<\/p><p>OSSB \u2013 Vn\u011bj\u0161\u00ed odsazen\u00ed (d\u00e9lka \u010d\u00e1sti, kter\u00e1 p\u0159esahuje \u00fahel ohybu).<\/p><p>R \u2013 Polom\u011br ohybu<\/p><p>K \u2013 K-faktor (ur\u010den\u00fd vlastnostmi materi\u00e1lu a tlou\u0161\u0165kou)<\/p><p>T \u2013 Tlou\u0161\u0165ka materi\u00e1lu<\/p><p>A \u2013 Po\u017eadovan\u00fd \u00fahel ohybu ve stupn\u00edch<\/p><p>P\u0159edpokl\u00e1dejme, \u017ee chceme ohnout 2 mm siln\u00fd plech z nerezov\u00e9 oceli do \u00fahlu 90\u00b0 s vnit\u0159n\u00edm polom\u011brem ohybu 3 mm. K-faktor pro tento materi\u00e1l je zn\u00e1m\u00fd jako 0,44. Vypo\u010dt\u011bme si odpo\u010det ohybu krok za krokem:<\/p><ol><li>Vypo\u010d\u00edtejte p\u0159\u00eddavek na ohyb (BA):<\/li><\/ol><p>BA = \u03c0 * (R + K * T) * (A \/ 180)<\/p><p>Kde R je vnit\u0159n\u00ed polom\u011br ohybu, K je K-faktor, T je tlou\u0161\u0165ka plechu a A je \u00fahel ohybu.<\/p><p>Dosazen\u00ed hodnot:<\/p><p>BA = \u03c0 * (3 + 0,44 * 2) * (90 \/ 180) = 4,39 mm<\/p><ol start=\"2\"><li>Vypo\u010d\u00edtejte vn\u011bj\u0161\u00ed odsazen\u00ed (OSSB):<\/li><\/ol><p>OSSB = R + T = 3 + 2 = 5 mm<\/p><ol start=\"3\"><li>Vypo\u010d\u00edtejte odpo\u010det ohybu (BD):<\/li><\/ol><p>BD = 2 * OSSB \u2013 BA<\/p><p>Dosazen\u00ed hodnot:<\/p><p>BD = 2 * 5 \u2013 4,39 = 5,61 mm<\/p><p>Abychom tedy dos\u00e1hli ohybu 90\u00b0 s vnit\u0159n\u00edm polom\u011brem ohybu 3 mm na tomto 2mm siln\u00e9m plechu z nerezov\u00e9 oceli, mus\u00edme b\u011bhem procesu oh\u00fdb\u00e1n\u00ed nastavit odpo\u010det ohybu na 5,61 mm.<\/p><p>To znamen\u00e1, \u017ee mus\u00edme plech ohnout o 5,61 mm, abychom kompenzovali pru\u017enost po ohnut\u00ed a nakonec dos\u00e1hli po\u017eadovan\u00e9ho \u00fahlu ohybu 90\u00b0.<\/p><p>V\u00fdpo\u010det odpo\u010dtu ohybu m\u016f\u017ee pomoci ur\u010dit rozm\u011bry d\u00edlu p\u0159ed oh\u00fdb\u00e1n\u00edm, co\u017e umo\u017e\u0148uje lep\u0161\u00ed pl\u00e1nov\u00e1n\u00ed v\u00fdroby a sn\u00ed\u017een\u00ed pl\u00fdtv\u00e1n\u00ed materi\u00e1lem.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8f08ff0 elementor-widget elementor-widget-heading\" data-id=\"8f08ff0\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Hlavn\u00ed funkce ode\u010dtu ohybu<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bafe19f elementor-widget elementor-widget-text-editor\" data-id=\"bafe19f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ol><li>Zaji\u0161t\u011bn\u00ed p\u0159esnosti ohybu. Ode\u010dten\u00ed ohybu umo\u017e\u0148uje \u0159\u00eddit d\u00e9lku a \u00fahel oh\u00fdban\u00e9ho plechu, \u010d\u00edm\u017e se zajist\u00ed, \u017ee vyroben\u00e9 plechov\u00e9 d\u00edly spl\u0148uj\u00ed po\u017eadavky na velikost a p\u0159esnost dan\u00e9 konstrukc\u00ed.<\/li><li>Zlep\u0161en\u00ed efektivity zpracov\u00e1n\u00ed. Konstrukce ode\u010dtu ohybu nejen sni\u017euje velikost v\u00fdroby, ale tak\u00e9 zabra\u0148uje opakovan\u00fdm experiment\u016fm a \u00faprav\u00e1m, \u010d\u00edm\u017e se zvy\u0161uje efektivita v\u00fdroby plechov\u00fdch d\u00edl\u016f.<\/li><li>Sn\u00ed\u017een\u00ed pl\u00fdtv\u00e1n\u00ed materi\u00e1lem. Pou\u017eit\u00edm ode\u010dtu ohyb\u016f k \u0159\u00edzen\u00ed rozm\u011br\u016f lze zabr\u00e1nit nadm\u011brn\u00e9mu zpracov\u00e1n\u00ed nebo pl\u00fdtv\u00e1n\u00ed materi\u00e1lem, \u010d\u00edm\u017e se sn\u00ed\u017e\u00ed n\u00e1klady a zv\u00fd\u0161\u00ed efektivita v\u00fdroby.<\/li><\/ol><p>Stru\u010dn\u011b \u0159e\u010deno, odpo\u010det ohybu je velmi d\u016fle\u017eit\u00fdm \u010dl\u00e1nkem v procesu zpracov\u00e1n\u00ed plechu a je tak\u00e9 kl\u00ed\u010dem k zaji\u0161t\u011bn\u00ed kvality a p\u0159esnosti hotov\u00e9ho v\u00fdrobku. P\u0159i skute\u010dn\u00e9m zpracov\u00e1n\u00ed by m\u011bla b\u00fdt hodnota odpo\u010dtu ohybu p\u0159im\u011b\u0159en\u011b upravena podle konkr\u00e9tn\u00ed situace, aby se dos\u00e1hlo co nejlep\u0161\u00edho efektu zpracov\u00e1n\u00ed.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ee7509b elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"ee7509b\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8b38b40 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8b38b40\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-309117f\" data-id=\"309117f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6b60e00 elementor-widget elementor-widget-heading\" data-id=\"6b60e00\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Materi\u00e1ly s r\u016fzn\u00fdm p\u0159\u00eddavkem na ohyb<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-560debf elementor-widget elementor-widget-heading\" data-id=\"560debf\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Jak\u00fd kov se dob\u0159e oh\u00fdb\u00e1?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a1541a4 elementor-widget elementor-widget-text-editor\" data-id=\"a1541a4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>V\u0161echny kovy maj\u00ed ur\u010dit\u00fd stupe\u0148 pru\u017enosti. N\u011bkter\u00e9 kovy jsou pru\u017en\u011bj\u0161\u00ed ne\u017e jin\u00e9 a mohou dos\u00e1hnout v\u011bt\u0161\u00edch toleranc\u00ed ohybu ve srovn\u00e1n\u00ed s jin\u00fdmi materi\u00e1ly. Kovy se \u0159ad\u00ed podle modulu pru\u017enosti, co\u017e je pom\u011br mezi nap\u011bt\u00edm a deformac\u00ed p\u0159i deformaci kovu. Modul pru\u017enosti je tak\u00e9 prost\u0159edkem k m\u011b\u0159en\u00ed tuhosti materi\u00e1lu nebo pru\u017en\u00e9ho odporu. Stejn\u00fdm zp\u016fsobem lze vypo\u010d\u00edtat i jin\u00e9 materi\u00e1ly, jako je guma a sklo.<\/p><p>P\u0159ekvapiv\u011b je jedn\u00edm z nejpru\u017en\u011bj\u0161\u00edch kov\u016f nikl-titan, zn\u00e1m\u00fd tak\u00e9 jako nikl-titan, s tlakem 28 GPa. Lze jej mnohokr\u00e1t ut\u00e1hnout do zna\u010dn\u00e9 m\u00edry, ani\u017e by byl pova\u017eov\u00e1n za deformovan\u00fd. Mezi b\u011b\u017en\u00fdmi typy kov\u016f pat\u0159\u00ed mezi druh\u00e9 nejpru\u017en\u011bj\u0161\u00ed kovy c\u00edn s 45 GPa, ho\u0159\u010d\u00edk, kadmium a hlin\u00edk s 69 GPa. Hlin\u00edk je samoz\u0159ejm\u011b zn\u00e1m\u00fd svou n\u00edzkou hmotnost\u00ed a ohybatelnost\u00ed, ale pokud jde o \u010dist\u00e9 kovy, v\u010detn\u011b slitin, existuj\u00ed kovy, kter\u00e9 ho v tomto ohledu dok\u00e1\u017e\u00ed p\u0159ekonat.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ee44e3a elementor-widget elementor-widget-heading\" data-id=\"ee44e3a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Kter\u00e9 kovy se nedaj\u00ed dob\u0159e ohnout, nebo se p\u0159i p\u0159\u00edli\u0161n\u00e9m ohnut\u00ed zlom\u00ed?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d8b8e64 elementor-widget elementor-widget-text-editor\" data-id=\"d8b8e64\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Jak je dob\u0159e zn\u00e1mo, v\u011bt\u0161ina kov\u016f je velmi tvrd\u00e1 a pokud se materi\u00e1l neoh\u00fdb\u00e1, p\u0159i oh\u00fdb\u00e1n\u00ed se ur\u010dit\u011b zlom\u00ed. Ze v\u0161ech slitin je wolfram nejtvrd\u0161\u00edm kovem, dosahuj\u00edc\u00edm a\u017e 411 GPa. I v nejten\u010d\u00ed form\u011b se wolfram obt\u00ed\u017en\u011b oh\u00fdb\u00e1, tak\u017ee se pravd\u011bpodobn\u011b rozbije jako sklo. Druh\u00fdm nejtvrd\u0161\u00edm kovem je berylium-m\u011b\u010f s tvrdost\u00ed 304 GPa. Chrom je materi\u00e1l, kter\u00fd se nach\u00e1z\u00ed v diamantech a dal\u0161\u00edch drahokamech, a s tvrdost\u00ed 279 GPa se um\u00edstil na t\u0159et\u00edm m\u00edst\u011b. Kovan\u00e9 \u017eelezo a kobalt maj\u00ed oba tvrdost 211 GPa. S tvrdost\u00ed 210 GPa existuje mnoho b\u011b\u017en\u011bj\u0161\u00edch kovov\u00fdch plech\u016f, jako je ocel, nerezov\u00e1 ocel, kobalt a nikl. Jak v\u00edte, v\u011bt\u0161ina kov\u016f je pova\u017eov\u00e1na za velmi tvrd\u00e9, ale jak ji\u017e bylo zm\u00edn\u011bno, n\u011bkter\u00e9 kovy nejsou tak tvrd\u00e9 jako jin\u00e9.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-79c4f81 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"79c4f81\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-11627b9 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"11627b9\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-77554ef\" data-id=\"77554ef\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cd896eb elementor-widget elementor-widget-heading\" data-id=\"cd896eb\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Z\u00e1v\u011br<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7b1b0f4 elementor-widget elementor-widget-text-editor\" data-id=\"7b1b0f4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>K-faktor, zn\u00e1m\u00fd tak\u00e9 jako faktor polom\u011bru ohybu, zohled\u0148uje tendenci materi\u00e1lu k natahov\u00e1n\u00ed na vn\u011bj\u0161\u00edm povrchu a stla\u010dov\u00e1n\u00ed na vnit\u0159n\u00edm povrchu b\u011bhem oh\u00fdb\u00e1n\u00ed.<\/p><p>Spr\u00e1vn\u00fd v\u00fdpo\u010det K-faktoru je d\u016fle\u017eit\u00fd pro ur\u010den\u00ed polohy neutr\u00e1ln\u00ed osy a minimalizaci potenci\u00e1ln\u00edch vad, jako jsou praskliny nebo vr\u00e1sky.<\/p><p>P\u0159\u00eddavek na ohyb se vztahuje k dodate\u010dn\u00e9mu materi\u00e1lu pot\u0159ebn\u00e9mu k p\u0159izp\u016fsoben\u00ed se polom\u011bru ohybu, \u010d\u00edm\u017e se zabr\u00e1n\u00ed nadm\u011brn\u00e9mu roztahov\u00e1n\u00ed nebo stla\u010dov\u00e1n\u00ed materi\u00e1lu.<\/p><p>P\u0159esn\u00fd v\u00fdpo\u010det p\u0159\u00eddavku na ohyb je z\u00e1sadn\u00ed pro zaji\u0161t\u011bn\u00ed souladu kone\u010dn\u00fdch rozm\u011br\u016f d\u00edlu s konstruk\u010dn\u00edmi specifikacemi.<\/p><p>Ode\u010det ohybu na druhou stranu kompenzuje efekt zp\u011btn\u00e9ho pru\u017en\u00e9ho r\u00e1zu materi\u00e1lu, kdy ohnut\u00e1 \u010d\u00e1st m\u00e1 tendenci se po odstran\u011bn\u00ed ohybov\u00e9 s\u00edly \u010d\u00e1ste\u010dn\u011b narovnat.<\/p><p>Zohledn\u011bn\u00ed ode\u010dtu ohybu je nezbytn\u00e9 pro dosa\u017een\u00ed po\u017eadovan\u00e9ho \u00fahlu ohybu a zachov\u00e1n\u00ed rozm\u011brov\u00e9 p\u0159esnosti.<\/p><p>Pochopen\u00edm a spr\u00e1vn\u00fdm uplatn\u011bn\u00edm t\u011bchto z\u00e1kladn\u00edch faktor\u016f m\u016f\u017eete optimalizovat procesy oh\u00fdb\u00e1n\u00ed, minimalizovat pl\u00fdtv\u00e1n\u00ed materi\u00e1lem a konzistentn\u011b vyr\u00e1b\u011bt vysoce kvalitn\u00ed oh\u00fdban\u00e9 komponenty, kter\u00e9 spl\u0148uj\u00ed nejp\u0159\u00edsn\u011bj\u0161\u00ed po\u017eadavky.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-439923d elementor-widget elementor-widget-text-editor\" data-id=\"439923d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><strong>Souvisej\u00edc\u00ed \u010dl\u00e1nky:<\/strong><\/p><p><a href=\"https:\/\/www.shen-chong.com\/cs\/press-brake-tonnage-calculator-for-users\/\" target=\"_blank\" rel=\"noopener\">V\u00fdpo\u010det nosnosti ohra\u0148ovac\u00edho lisu<\/a>\u00a0<\/p><p><a href=\"https:\/\/www.shen-chong.com\/cs\/top-8-china-laser-cutting-machine-brands-ranking\/\" target=\"_blank\" rel=\"noopener\">8 nejlep\u0161\u00edch v\u00fdrobc\u016f laserov\u00fdch \u0159ezac\u00edch stroj\u016f<\/a><\/p><p><a href=\"https:\/\/www.shen-chong.com\/cs\/top-12-cnc-machine-manufacturers\/\" target=\"_blank\" rel=\"noopener\">12 nejlep\u0161\u00edch v\u00fdrobc\u016f CNC stroj\u016f<\/a><\/p><p><a href=\"https:\/\/www.shen-chong.com\/cs\/top-china-press-brake-machine-brands-ranking\/\" target=\"_blank\" rel=\"noopener\">\u017deb\u0159\u00ed\u010dek nejlep\u0161\u00edch zna\u010dek ohra\u0148ovac\u00edch lis\u016f v \u010c\u00edn\u011b<\/a><\/p><p><a href=\"https:\/\/www.shen-chong.com\/cs\/all-you-need-to-know-about-sheet-metal-gauge\/\" target=\"_blank\" rel=\"noopener\">V\u0161e, co pot\u0159ebujete v\u011bd\u011bt o m\u011b\u0159idlech plech\u016f<\/a><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Obsah \u00davod V\u00fdpo\u010det spr\u00e1vn\u00e9ho faktoru K, p\u0159\u00eddavku na ohyb a odpo\u010dtu ohybu je kl\u00ed\u010dov\u00fd pro z\u00edsk\u00e1n\u00ed kvalitn\u00edho hotov\u00e9ho d\u00edlu z hydraulick\u00e9ho ohra\u0148ovac\u00edho lisu. Znalost a technika ohra\u0148ovac\u00edho lisu jsou jeho z\u00e1kladem, kter\u00e9 jsou kl\u00ed\u010dov\u00e9 pro jeho pou\u017eit\u00ed ve v\u00fdrob\u011b. V\u00fdpo\u010det d\u00e9lky rozvinu z [\u2026]<\/p>","protected":false},"author":1,"featured_media":2773,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2772","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-events"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What Are The K Factor, Bend Allowance, And Bend Deduction? - SC Machinery<\/title>\n<meta name=\"description\" content=\"Bend allowance, K factor and bend deduction are critical value during the bending process. 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