{"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\/pt\/what-are-the-k-factor-bend-allowance-and-bend-deduction\/","title":{"rendered":"Quais s\u00e3o o fator K, a toler\u00e2ncia de curvatura e a dedu\u00e7\u00e3o de curvatura?"},"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 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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\t\u00cdndice\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=\"Abrir \u00edndice\"><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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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\">Introdu\u00e7\u00e3o<\/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>Calcular o fator K correto, a toler\u00e2ncia de dobra e a dedu\u00e7\u00e3o de dobra s\u00e3o cruciais para obter uma pe\u00e7a acabada de boa qualidade do seu <a href=\"https:\/\/www.shen-chong.com\/pt\/pressione-o-freio\/\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #3366ff;\"><strong><b>hidr\u00e1ulico<\/b><\/strong><strong><b>\u00a0pressione o freio<\/b><\/strong><\/span><\/a>. O conhecimento e a t\u00e9cnica da prensa dobradeira s\u00e3o seus fundamentos, fundamentais para ajud\u00e1-lo a utiliz\u00e1-la na fabrica\u00e7\u00e3o.<\/p><p>Calcular o comprimento da planifica\u00e7\u00e3o a partir da pe\u00e7a 3D n\u00e3o \u00e9 t\u00e3o dif\u00edcil. Embora voc\u00ea possa encontrar v\u00e1rias f\u00f3rmulas diferentes que pretendem calcular a toler\u00e2ncia de dobra, elas geralmente s\u00e3o a mesma f\u00f3rmula, apenas simplificadas pelo preenchimento do \u00e2ngulo ou de um fator K. Este artigo mostrar\u00e1 essas informa\u00e7\u00f5es, incluindo o fator K, margem de dobra e dedu\u00e7\u00e3o de dobra.<\/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 .elementor-divider__element{margin:0 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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\">O que \u00e9 toler\u00e2ncia de curvatura?<\/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>Os metais podem realmente ser dobrados. Na fabrica\u00e7\u00e3o de chapas met\u00e1licas, o metal deve ser dobrado, n\u00e3o apenas para formar um determinado formato, mas tamb\u00e9m para cumprir as normas de seguran\u00e7a quando o metal \u00e9 submetido a impactos, fazendo com que ele dobre em vez de quebrar. Independentemente do tipo de metal, bem como da forma e espessura do metal, cada pe\u00e7a de metal possui um certo grau de toler\u00e2ncia \u00e0 flex\u00e3o.<\/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\">Defini\u00e7\u00e3o de toler\u00e2ncia de dobra<\/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>A toler\u00e2ncia de dobra (BA) \u00e9 o comprimento do arco de flex\u00e3o medido ao longo do eixo neutro da placa de metal, uma vez que o comprimento do eixo neutro n\u00e3o muda ap\u00f3s a flex\u00e3o.<\/p><p>Uma vez calculada a toler\u00e2ncia de dobra, ela deve ser adicionada ao comprimento plano para determinar o comprimento da chapa met\u00e1lica necess\u00e1rio para formar a pe\u00e7a de trabalho desejada.<\/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\">Como calcular a toler\u00e2ncia de dobra<\/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>Como \u00e9 mostrado na figura abaixo:<\/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=\"toler\u00e2ncia de curvatura\" 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>A seguinte f\u00f3rmula \u00e9 usada para calcular o comprimento plano:<\/p><p style=\"text-align: center;\"><span style=\"color: #0000ff;\"><strong><b>Comprimento plano de chapa met\u00e1lica<\/b><\/strong><strong><b>\u00a0<\/b><\/strong><strong><b>=<\/b><\/strong><strong><b>\u00a0<\/b><\/strong><strong><b>Comprimento da perna 1 +BA + comprimento da perna 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\">F\u00f3rmula de c\u00e1lculo de toler\u00e2ncia de dobra<\/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=\"f\u00f3rmula de toler\u00e2ncia de dobra\" 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 \u00c2ngulo de curvatura<\/p><p>R \u2013 Raio interno<\/p><p>K \u2013 Fator K<\/p><p>T \u2013 Espessura do material<\/p><p>Vamos come\u00e7ar com um colchete L simples. A imagem mostra que as pernas do suporte t\u00eam 2\u201d e 3\u201d. A espessura do material \u00e9 0,125\u201d, o raio interno \u00e9 0,250\u201d e o \u00e2ngulo de curvatura \u00e9 90 graus. O comprimento plano \u00e9 o total da por\u00e7\u00e3o plana de ambos os flanges mais o comprimento atrav\u00e9s do arco da \u00e1rea dobrada. Mas voc\u00ea calcula isso por dentro ou por fora do material? Nenhum! \u00c9 aqui que o fator K entra em jogo. O fator K \u00e9 a porcentagem da espessura do material onde n\u00e3o h\u00e1 estiramento ou compress\u00e3o do material, por exemplo, o eixo neutro. Para este colchete L simples, usarei um fator K de 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=\"caso de c\u00e1lculo de toler\u00e2ncia de dobra\" 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>Usando a f\u00f3rmula acima, temos: Toler\u00e2ncia de dobra = 90 * (\u03c0 \/ 180) * (0,250 + 0,42 * 0,125) = 0,475\u2033.<\/p><p>Portanto, o comprimento da planifica\u00e7\u00e3o \u00e9 1,625\u201d + 2,625\u201d + 0,475\u2033, que \u00e9 igual a 4,725\u2033. Portanto, se voc\u00ea somar o comprimento plano de todos os flanges e adicionar uma toler\u00e2ncia de dobra para cada \u00e1rea de dobra, ter\u00e1 o comprimento plano correto da pe\u00e7a.<\/p><p>Mas olhe o desenho. N\u00e3o \u00e9 assim que normalmente dimensionamos uma pe\u00e7a de chapa met\u00e1lica. As dimens\u00f5es s\u00e3o geralmente at\u00e9 a interse\u00e7\u00e3o dos flanges ou da Linha do Molde. Isso significa que temos que subtrair duas vezes a espessura do material mais o raio de dobra (tamb\u00e9m conhecido como recuo) para cada \u00e1rea de dobra. Para este conjunto de dimens\u00f5es, seria mais f\u00e1cil calcular o valor da Compensa\u00e7\u00e3o de Dobra. O valor de Compensa\u00e7\u00e3o de dobra permite somar o comprimento de cada flange usando as dimens\u00f5es da Linha do molde e, em seguida, adicionar uma Compensa\u00e7\u00e3o de dobra por \u00e1rea de dobra ao total. \u00c9 -0,275, um n\u00famero negativo, o que significa que voc\u00ea subtrair\u00e1 esse valor do total dos comprimentos do flange, 5\u201d, para obter 4,725\u2033.<\/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\">O que \u00e9 fator K?<\/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>O fator k \u00e9 a porcentagem da espessura do material onde n\u00e3o h\u00e1 estiramento ou compress\u00e3o do material na \u00e1rea de dobra.<\/p><p>Quanto mais duro for o material, menor ser\u00e1 a compress\u00e3o no interior da dobra. Portanto, h\u00e1 mais alongamento do lado de fora e o eixo neutro se move em dire\u00e7\u00e3o ao interior da curva. Materiais mais macios permitem maior compress\u00e3o no interior e o eixo neutro permanece mais pr\u00f3ximo do centro da espessura do material.<\/p><p>O raio de curvatura tem um efeito semelhante. Quanto menor o raio da curvatura, maior ser\u00e1 a necessidade de compress\u00e3o e o eixo neutro se mover\u00e1 em dire\u00e7\u00e3o ao interior da curvatura. Em um raio maior. o eixo neutro permanece pr\u00f3ximo ao centro da espessura do material.<\/p><p>Para entender o fator K, precisamos primeiro entender o eixo neutro.<\/p><p>Quando a chapa met\u00e1lica \u00e9 dobrada, a superf\u00edcie inferior \u00e9 comprimida e a superf\u00edcie superior \u00e9 esticada. O eixo neutro est\u00e1 localizado dentro do metal onde n\u00e3o ser\u00e1 comprimido nem expandido, permitindo manter um comprimento constante.<\/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=\"eixo neutro\" 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\">Eixo neutro<\/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>O eixo neutro n\u00e3o muda. Ao desenvolver um comprimento de pe\u00e7a plana, h\u00e1 um comprimento da pe\u00e7a que n\u00e3o muda. Esse comprimento \u00e9 chamado de eixo neutro. O material na parte interna do eixo neutro ser\u00e1 comprimido, enquanto o material na parte externa ser\u00e1 esticado. Com base na espessura do material, no raio da forma e nos m\u00e9todos de conforma\u00e7\u00e3o, a rela\u00e7\u00e3o entre compress\u00e3o e tens\u00e3o na pe\u00e7a mudar\u00e1.<\/p><p>Uma pe\u00e7a que \u00e9 dobrada sobre um raio muito acentuado, quando comparada \u00e0 espessura, esticar\u00e1 mais do lado de fora, o que significa que o eixo neutro ficar\u00e1 mais pr\u00f3ximo do interior da dobra. Uma pe\u00e7a que \u00e9 gradualmente dobrada ter\u00e1 menos alongamento externo, o que significa que o eixo neutro ficar\u00e1 mais pr\u00f3ximo do centro da pe\u00e7a.<\/p><p>Em chapas planas, o eixo neutro est\u00e1 localizado uniformemente na metade da espessura da chapa, mas se mover\u00e1 durante a flex\u00e3o.<\/p><p>A mudan\u00e7a de posi\u00e7\u00e3o do eixo neutro \u00e9 determinada por v\u00e1rios fatores, como propriedades do material, espessura, \u00e2ngulo de curvatura, raio interno e m\u00e9todo de curvatura da placa.<\/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\">Como calcular fatores K<\/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>Matematicamente, o fator K representa a raz\u00e3o entre a posi\u00e7\u00e3o do eixo neutro (t) e a espessura da placa (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\">F\u00f3rmula de Fatores K<\/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=\"f\u00f3rmula de c\u00e1lculo do fator 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>Onde t \u00e9 a dist\u00e2ncia da superf\u00edcie interna ao eixo neutro e T \u00e9 a espessura do metal.<\/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=\"f\u00f3rmula do fator k\" 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>O fator K \u00e9 determinado pelas propriedades f\u00edsicas do material, m\u00e9todo de dobra, \u00e2ngulo de dobra e outros fatores.<\/p><p>O valor dos fatores K estar\u00e1 sempre entre 0 e 1. Se um fator k for 0,25, significa que o eixo neutro est\u00e1 localizado em 25% da espessura do material da chapa met\u00e1lica da pe\u00e7a. Da mesma forma, se for 0,5, significa que o eixo neutro est\u00e1 localizado em 50% de toda a espessura.<\/p><p><strong><b>Propriedades dos materiais:<\/b><\/strong>\u00a0normalmente varia entre 0,30 e 0,50. Em geral, o fator K de cobre macio ou materiais de cobre macio \u00e9 0,35, o fator K de materiais como cobre semiduro ou lat\u00e3o, a\u00e7o macio e alum\u00ednio \u00e9 0,41, e o fator K de materiais como bronze, cobre duro, a\u00e7o laminado a frio e a\u00e7o para molas \u00e9 0,45.<\/p><p><strong><b>Raio de curvatura: <\/b><\/strong>quanto menor o raio de curvatura, maior o fator K.<\/p><p><strong><b>Espessura do material: <\/b><\/strong>quanto maior a espessura do material, maior o fator K.<\/p><p><strong><b>For\u00e7a de escoamento do material:<\/b><\/strong>\u00a0quanto maior o limite de escoamento, menor o fator K.<\/p><p><strong><b>M\u00f3dulo el\u00e1stico (tamb\u00e9m conhecido como m\u00f3dulo de Young):<\/b><\/strong>\u00a0quanto maior a espessura do material, maior o fator K.<\/p><p>Na fabrica\u00e7\u00e3o de chapas met\u00e1licas de precis\u00e3o usando <a href=\"https:\/\/www.shen-chong.com\/pt\/maquina-dobradeira-cnc\/\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #3366ff;\"><strong>Prensa dobradeira CNC<\/strong><\/span><\/a>, o fator K \u00e9 um fator crucial. O fator K \u00e9 usado para calcular o padr\u00e3o plano de dobra, que est\u00e1 diretamente relacionado ao comprimento da chapa esticada durante a dobra.<\/p><p>\u00c9 o valor fundamental para determinar a toler\u00e2ncia \u00e0 flex\u00e3o e a dedu\u00e7\u00e3o da flex\u00e3o.<\/p><p>Como a rela\u00e7\u00e3o entre a dist\u00e2ncia ao eixo neutro e a espessura da placa determina a posi\u00e7\u00e3o do eixo neutro na placa met\u00e1lica, conhecer o fator K ajuda a determinar a posi\u00e7\u00e3o do eixo neutro ap\u00f3s a flex\u00e3o.<\/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\">Fatores K para alum\u00ednio e a\u00e7o<\/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>Voc\u00ea tamb\u00e9m pode determinar o fator K usando a tabela abaixo:<\/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=\"fator k para alum\u00ednio e a\u00e7o\" 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\">Fatores K para cobre, lat\u00e3o e bronze<\/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>Ap\u00f3s um estudo cuidadoso, descobriu-se que o sistema SolidWorks tamb\u00e9m fornece algoritmos de compensa\u00e7\u00e3o de flex\u00e3o para os seguintes materiais espec\u00edficos em um \u00e2ngulo de flex\u00e3o de 90 graus. A f\u00f3rmula de c\u00e1lculo espec\u00edfica \u00e9 a seguinte:<\/p><p>Material de lat\u00e3o macio ou cobre macio: BA=(0,55 * T)+(1,57 * R)<\/p><p>Materiais como cobre semi-duro ou lat\u00e3o, a\u00e7o macio e alum\u00ednio: BA=(0,64 * T)+(1,57 * R) Materiais como bronze, cobre duro, a\u00e7o laminado a frio e a\u00e7o para mola: BA=(0,71 * T)+(1,57 * R) Na verdade, se simplificarmos a equa\u00e7\u00e3o (7) e definirmos o \u00e2ngulo de flex\u00e3o para 90 graus e calcularmos a constante, a equa\u00e7\u00e3o pode ser transformada em:<\/p><p>BA = (1,57 * K * T) + (1,57 * R)<\/p><p>Assim, para materiais de lat\u00e3o macio ou cobre macio, comparando a f\u00f3rmula de c\u00e1lculo acima, podemos obter 1,57xK=0,55K=0,55\/1,57=0,35. \u00c9 f\u00e1cil calcular os valores do fator k de v\u00e1rios tipos de materiais listados no livro usando o mesmo m\u00e9todo.<\/p><p>Material de lat\u00e3o macio ou cobre macio: K = 0,35.<\/p><p>Materiais como cobre semi-duro ou lat\u00e3o, a\u00e7o macio e alum\u00ednio: K=0,41.<\/p><p>Materiais como bronze, cobre duro, a\u00e7o laminado a frio e a\u00e7o para molas: 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\">O que \u00e9 dedu\u00e7\u00e3o de curvatura?<\/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>Ao dobrar chapas met\u00e1licas, devido \u00e0 deforma\u00e7\u00e3o pl\u00e1stica incompleta do material e \u00e0s limita\u00e7\u00f5es estruturais da pr\u00f3pria m\u00e1quina-ferramenta, o \u00e2ngulo e o comprimento da pe\u00e7a dobrada podem divergir das dimens\u00f5es projetadas. Para garantir que a precis\u00e3o da dobra e o tamanho da pe\u00e7a atenda aos requisitos, \u00e9 necess\u00e1rio considerar a dedu\u00e7\u00e3o da dobra durante a produ\u00e7\u00e3o do desenho, ou seja, reduzir o tamanho da dobra que precisa ser feita.<\/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\">Defini\u00e7\u00e3o de dedu\u00e7\u00e3o de dobra<\/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>A dedu\u00e7\u00e3o da dobra \u00e9 o comprimento do material que precisamos remover do comprimento total da placa para obter o padr\u00e3o plano correto.<\/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\">Princ\u00edpio de dedu\u00e7\u00e3o de curvatura<\/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>O princ\u00edpio da dedu\u00e7\u00e3o da flex\u00e3o \u00e9 utilizar a deforma\u00e7\u00e3o el\u00e1stica do material, de modo que o comprimento e o \u00e2ngulo ap\u00f3s a flex\u00e3o possam atender aos requisitos do projeto. Ao dobrar, a chapa met\u00e1lica \u00e9 colocada na m\u00e1quina dobradeira, que aplica for\u00e7a de dobra para causar deforma\u00e7\u00e3o el\u00e1stica da chapa met\u00e1lica, resultando em mudan\u00e7as na forma e no \u00e2ngulo e, por fim, tornando-se a forma desejada. Neste processo, a dedu\u00e7\u00e3o da flex\u00e3o pode ser controlada com precis\u00e3o ajustando o tamanho do desenho, atingindo a precis\u00e3o e o tamanho exigidos pelo projeto.<\/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=\"princ\u00edpio de dedu\u00e7\u00e3o de curvatura\" 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>De acordo com a figura acima, a dedu\u00e7\u00e3o da dobra \u00e9 a diferen\u00e7a entre a toler\u00e2ncia de dobra e o dobro do recuo externo.<\/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\">F\u00f3rmula de c\u00e1lculo de dedu\u00e7\u00e3o de dobra<\/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=\"f\u00f3rmula de dedu\u00e7\u00e3o de curvatura\" 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>Onde:<\/p><p>OSSB \u2013 O recuo externo (o comprimento da pe\u00e7a que se estende al\u00e9m do \u00e2ngulo de dobra).<\/p><p>R \u2013 Raio de curvatura<\/p><p>K \u2013 Fator K (determinado pelas propriedades e espessura do material)<\/p><p>T \u2013 Espessura do material<\/p><p>A \u2013 \u00c2ngulo de curvatura desejado em graus<\/p><p>Vamos supor que queremos dobrar uma chapa de a\u00e7o inoxid\u00e1vel com 2 mm de espessura em um \u00e2ngulo de 90\u00b0 com um raio de curvatura interno de 3 mm. O fator K para este material \u00e9 conhecido como 0,44. Vamos calcular a dedu\u00e7\u00e3o de curvatura passo a passo:<\/p><ol><li>Calcule a toler\u00e2ncia de dobra (BA):<\/li><\/ol><p>BA = \u03c0 * (R + K * T) * (A\/180)<\/p><p>Onde R \u00e9 o raio de dobra interno, K \u00e9 o fator K, T \u00e9 a espessura da chapa e A \u00e9 o \u00e2ngulo de dobra.<\/p><p>Conectando os valores:<\/p><p>BA = \u03c0 * (3 + 0,44 * 2) * (90\/180) = 4,39 mm<\/p><ol start=\"2\"><li>Calcule o Recuo Externo (OSSB):<\/li><\/ol><p>OSSB = R + T = 3 + 2 = 5mm<\/p><ol start=\"3\"><li>Calcule a dedu\u00e7\u00e3o de curvatura (BD):<\/li><\/ol><p>BD = 2 * OSSB \u2013 BA<\/p><p>Conectando os valores:<\/p><p>BD = 2 * 5 \u2013 4,39 = 5,61 mm<\/p><p>Portanto, para obter uma dobra de 90\u00b0 com um raio de curvatura interno de 3 mm nesta chapa de a\u00e7o inoxid\u00e1vel de 2 mm de espessura, precisamos definir a Dedu\u00e7\u00e3o de Dobra para 5,61 mm durante o processo de dobra.<\/p><p>Isso significa que precisamos dobrar demais a folha em 5,61 mm para compensar o retorno el\u00e1stico ap\u00f3s a dobra, alcan\u00e7ando finalmente o \u00e2ngulo de dobra desejado de 90\u00b0.<\/p><p>O c\u00e1lculo da dedu\u00e7\u00e3o da dobra pode ajudar a determinar as dimens\u00f5es da pe\u00e7a antes da dobra, permitindo um melhor planejamento da produ\u00e7\u00e3o e redu\u00e7\u00e3o do desperd\u00edcio de material.<\/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\">Principais fun\u00e7\u00f5es da dedu\u00e7\u00e3o de flex\u00e3o<\/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>Garanta a precis\u00e3o da dobra. A dedu\u00e7\u00e3o de dobra pode controlar o comprimento e o \u00e2ngulo da chapa dobrada, garantindo assim que as pe\u00e7as de chapa produzidas atendam aos requisitos de tamanho e precis\u00e3o do projeto.<\/li><li>Melhore a efici\u00eancia do processamento. O projeto de dedu\u00e7\u00e3o de flex\u00e3o n\u00e3o apenas reduz o tamanho da produ\u00e7\u00e3o, mas tamb\u00e9m evita experimentos e ajustes repetidos, melhorando assim a efici\u00eancia da fabrica\u00e7\u00e3o de pe\u00e7as de chapa met\u00e1lica.<\/li><li>Reduza o desperd\u00edcio de materiais. Ao usar a dedu\u00e7\u00e3o de flex\u00e3o para controlar as dimens\u00f5es, o processamento excessivo ou o desperd\u00edcio de material podem ser evitados, reduzindo assim os custos e melhorando a efici\u00eancia da produ\u00e7\u00e3o.<\/li><\/ol><p>Resumindo, a dedu\u00e7\u00e3o da flex\u00e3o \u00e9 um elo muito importante no processo de processamento de chapas met\u00e1licas e tamb\u00e9m a chave para garantir a qualidade e precis\u00e3o do produto acabado. No processamento real, o valor da dedu\u00e7\u00e3o de flex\u00e3o deve ser ajustado razoavelmente de acordo com a situa\u00e7\u00e3o espec\u00edfica para obter o melhor efeito de processamento.<\/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\">Materiais com diferentes toler\u00e2ncias de curvatura<\/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\">Que metal pode dobrar bem?<\/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>Todos os metais possuem um certo grau de elasticidade. Alguns metais s\u00e3o mais el\u00e1sticos que outros e podem atingir maiores toler\u00e2ncias de flex\u00e3o em compara\u00e7\u00e3o com outros materiais. Os metais s\u00e3o classificados de acordo com seu m\u00f3dulo de elasticidade, que \u00e9 a raz\u00e3o entre tens\u00e3o e deforma\u00e7\u00e3o na deforma\u00e7\u00e3o do metal. O m\u00f3dulo el\u00e1stico tamb\u00e9m \u00e9 um meio de medir a rigidez do material ou a resist\u00eancia el\u00e1stica. Outros materiais como borracha e vidro tamb\u00e9m podem ser calculados da mesma forma.<\/p><p>Surpreendentemente, um dos metais mais el\u00e1sticos \u00e9 o n\u00edquel tit\u00e2nio, tamb\u00e9m conhecido como n\u00edquel tit\u00e2nio, com press\u00e3o de 28 GPa. Pode ser apertado muitas vezes sem ser considerado deformado. Entre os tipos de metais comuns, os segundos maiores metais el\u00e1sticos incluem 45 GPa de estanho, magn\u00e9sio, c\u00e1dmio e 69 GPa de alum\u00ednio. \u00c9 claro que o alum\u00ednio \u00e9 conhecido por sua leveza e capacidade de flex\u00e3o, mas em termos de metais puros, incluindo ligas, existem alguns metais que podem super\u00e1-lo nesse aspecto.<\/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\">Quais metais n\u00e3o podem dobrar bem ou fraturar\u00e3o quando dobrados demais?<\/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>Como \u00e9 bem sabido, a maioria dos metais \u00e9 muito dura e, se o material n\u00e3o for dobrado, certamente quebrar\u00e1 quando dobrado. Dentre todas as ligas, o tungst\u00eanio \u00e9 o metal mais duro, podendo atingir at\u00e9 411 GPa. Mesmo na sua forma mais fina, o tungst\u00eanio \u00e9 dif\u00edcil de dobrar, por isso \u00e9 prov\u00e1vel que quebre como o vidro. O segundo metal mais duro \u00e9 o cobre-ber\u00edlio 304GPa. O cromo \u00e9 um material encontrado em diamantes e outras pedras preciosas, ocupando o terceiro lugar com 279 GPa. Ferro forjado e cobalto t\u00eam 211 GPa. A 210GPa, voc\u00ea tem muito mais chapas met\u00e1licas comuns, como a\u00e7o, a\u00e7o inoxid\u00e1vel, cobalto e n\u00edquel. Como voc\u00ea sabe, a maioria dos metais s\u00e3o considerados muito duros, mas como mencionado anteriormente, alguns metais n\u00e3o s\u00e3o t\u00e3o duros quanto outros.<\/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\">Conclus\u00e3o<\/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>O fator K, tamb\u00e9m conhecido como fator do raio de curvatura, \u00e9 respons\u00e1vel pela tend\u00eancia do material de esticar na superf\u00edcie externa e comprimir na superf\u00edcie interna durante a flex\u00e3o.<\/p><p>O c\u00e1lculo adequado do fator K \u00e9 importante para determinar a posi\u00e7\u00e3o do eixo neutro e minimizar poss\u00edveis defeitos como rachaduras ou enrugamentos.<\/p><p>A toler\u00e2ncia de dobra refere-se ao material adicional necess\u00e1rio para acomodar o raio de curvatura, evitando estiramento ou compress\u00e3o excessivos do material.<\/p><p>O c\u00e1lculo preciso da toler\u00e2ncia de dobra \u00e9 vital para garantir que as dimens\u00f5es finais da pe\u00e7a estejam alinhadas com as especifica\u00e7\u00f5es do projeto.<\/p><p>A dedu\u00e7\u00e3o de flex\u00e3o, por outro lado, compensa o efeito el\u00e1stico do material, onde a parte dobrada tende a se desdobrar parcialmente ap\u00f3s a remo\u00e7\u00e3o da for\u00e7a de flex\u00e3o.<\/p><p>A contabiliza\u00e7\u00e3o da dedu\u00e7\u00e3o de dobra \u00e9 essencial para atingir o \u00e2ngulo de dobra desejado e manter a precis\u00e3o dimensional.<\/p><p>Ao compreender e aplicar adequadamente esses fatores essenciais, voc\u00ea pode otimizar seus processos de dobra, minimizar o desperd\u00edcio de material e produzir consistentemente componentes dobrados de alta qualidade que atendam aos requisitos mais rigorosos.<\/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>Artigos relacionados:<\/strong><\/p><p><a href=\"https:\/\/www.shen-chong.com\/pt\/press-brake-tonnage-calculator-for-users\/\" target=\"_blank\" rel=\"noopener\">C\u00e1lculo da tonelagem do freio de imprensa<\/a>\u00a0<\/p><p><a href=\"https:\/\/www.shen-chong.com\/pt\/top-8-china-laser-cutting-machine-brands-ranking\/\" target=\"_blank\" rel=\"noopener\">Os 8 principais fabricantes de m\u00e1quinas de corte a laser<\/a><\/p><p><a href=\"https:\/\/www.shen-chong.com\/pt\/top-12-cnc-machine-manufacturers\/\" target=\"_blank\" rel=\"noopener\">Os 12 principais fabricantes de m\u00e1quinas CNC<\/a><\/p><p><a href=\"https:\/\/www.shen-chong.com\/pt\/top-china-press-brake-machine-brands-ranking\/\" target=\"_blank\" rel=\"noopener\">Classifica\u00e7\u00e3o das principais marcas de m\u00e1quinas dobradeiras na China<\/a><\/p><p><a href=\"https:\/\/www.shen-chong.com\/pt\/all-you-need-to-know-about-sheet-metal-gauge\/\" target=\"_blank\" rel=\"noopener\">Tudo o que voc\u00ea precisa saber sobre medidor de chapa met\u00e1lica<\/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>\u00cdndice Introdu\u00e7\u00e3o Calcular o fator K correto, a toler\u00e2ncia de dobra e a dedu\u00e7\u00e3o de dobra s\u00e3o cruciais para obter uma pe\u00e7a acabada de boa qualidade de sua prensa dobradeira hidr\u00e1ulica. O conhecimento e a t\u00e9cnica da prensa dobradeira s\u00e3o seus fundamentos, fundamentais para ajud\u00e1-lo a utiliz\u00e1-la na fabrica\u00e7\u00e3o. Calculando o comprimento da planifica\u00e7\u00e3o a partir do [\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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