{"id":3517,"date":"2024-09-23T02:16:33","date_gmt":"2024-09-23T02:16:33","guid":{"rendered":"https:\/\/www.shen-chong.com\/?p=3517"},"modified":"2024-09-23T02:47:10","modified_gmt":"2024-09-23T02:47:10","slug":"common-bending-quality-problems-and-solutions","status":"publish","type":"post","link":"https:\/\/www.shen-chong.com\/pt\/common-bending-quality-problems-and-solutions\/","title":{"rendered":"Problemas comuns de qualidade de dobra e solu\u00e7\u00f5es"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"3517\" class=\"elementor elementor-3517\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c50b28c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c50b28c\" 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 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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__dea4de2\" 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 class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__dea4de2\" aria-expanded=\"true\" aria-label=\"Fechar \u00edndice\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t<div id=\"elementor-toc__dea4de2\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewbox=\"0 0 1000 1000\" 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<div class=\"elementor-element elementor-element-728226a elementor-widget elementor-widget-text-editor\" data-id=\"728226a\" 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>Durante o processo de produ\u00e7\u00e3o e fabrica\u00e7\u00e3o, v\u00e1rios problemas de qualidade de dobra podem surgir ao dobrar pe\u00e7as de chapa met\u00e1lica, o que pode afetar a melhoria da efici\u00eancia da produ\u00e7\u00e3o e a estabilidade da qualidade do produto. Este artigo elabora problemas comuns de qualidade de dobra e corte na pr\u00e1tica de produ\u00e7\u00e3o, analisa as causas dos problemas e prop\u00f5e solu\u00e7\u00f5es para fornecer experi\u00eancia e refer\u00eancia para problemas semelhantes na pr\u00e1tica de produ\u00e7\u00e3o subsequente.<\/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-138335f elementor-widget elementor-widget-heading\" data-id=\"138335f\" 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-7f679c3 elementor-widget elementor-widget-text-editor\" data-id=\"7f679c3\" 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 dobra de chapas met\u00e1licas \u00e9 o processo de utiliza\u00e7\u00e3o de um molde universal (ou molde especializado) equipado com um <a href=\"https:\/\/www.shen-chong.com\/pt\/maquina-dobradeira-cnc\/\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #3366ff;\">M\u00e1quina dobradeira CNC<\/span><\/a>\u00a0para dobrar chapas de metal em v\u00e1rias formas geom\u00e9tricas transversais necess\u00e1rias de pe\u00e7as de trabalho. A racionalidade do processo de dobra afeta diretamente o tamanho e a apar\u00eancia da conforma\u00e7\u00e3o final do produto. A sele\u00e7\u00e3o razo\u00e1vel de moldes de dobra \u00e9 crucial para a conforma\u00e7\u00e3o final dos produtos.<\/p><p>No processo de produ\u00e7\u00e3o real, devido \u00e0 incerteza do tamanho do produto e \u00e0 diversidade de tipos de produtos, frequentemente encontramos problemas como interfer\u00eancia de tamanho e \u00e2ngulos de molde incompat\u00edveis durante a dobra de pe\u00e7as processadas a frio, o que traz grandes dificuldades \u00e0 produ\u00e7\u00e3o. Devido \u00e0 influ\u00eancia de fatores como tamanho do produto, forma, material, molde, equipamento e instala\u00e7\u00f5es auxiliares durante o processo de dobra, v\u00e1rios problemas de qualidade podem ocorrer, afetando a efici\u00eancia da produ\u00e7\u00e3o e a estabilidade da qualidade do produto. Portanto, \u00e9 particularmente importante abordar e evitar a ocorr\u00eancia desses problemas de qualidade de dobra. Este artigo resume e descreve principalmente os problemas de qualidade comuns da dobra de chapas met\u00e1licas na pr\u00e1tica de produ\u00e7\u00e3o, analisa as raz\u00f5es com base na experi\u00eancia de produ\u00e7\u00e3o e prop\u00f5e solu\u00e7\u00f5es.<\/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-69c41d4 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"69c41d4\" 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 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.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-f52a002 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f52a002\" 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-50e1a87\" data-id=\"50e1a87\" 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-3802f85 elementor-widget elementor-widget-heading\" data-id=\"3802f85\" 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\">Problemas comuns de qualidade de dobra<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3b4a400 elementor-widget elementor-widget-heading\" data-id=\"3b4a400\" 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\">Dobrando e rachando<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a92bbb2 elementor-widget elementor-widget-text-editor\" data-id=\"a92bbb2\" 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>Fissuras por flex\u00e3o se referem ao fen\u00f4meno em que rebarbas ou pequenas fissuras frequentemente aparecem nas bordas dos materiais ap\u00f3s corte, cisalhamento ou estampagem, e a concentra\u00e7\u00e3o de tens\u00e3o \u00e9 facilmente formada durante a flex\u00e3o, resultando em fissuras. A ranhura de refor\u00e7o em forma de U das pe\u00e7as da locomotiva trinca nos cantos ap\u00f3s a flex\u00e3o, conforme mostrado na Figura 1.<\/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-628a8a6 elementor-widget elementor-widget-image\" data-id=\"628a8a6\" 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=\"496\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-and-cracking.jpg\" class=\"attachment-full size-full wp-image-3520\" alt=\"dobrando e rachando\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-and-cracking.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-and-cracking-300x229.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-and-cracking-16x12.jpg 16w\" 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-fecf99f elementor-widget elementor-widget-text-editor\" data-id=\"fecf99f\" 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 style=\"text-align: center;\">Figura 1 Flex\u00e3o e fissura\u00e7\u00e3o<\/p><p>\u00a0<\/p><p>As principais causas de entortamento e rachaduras s\u00e3o:<\/p><ol><li>Rebarbas sujas nas bordas das pe\u00e7as.<\/li><li>A dire\u00e7\u00e3o de dobra \u00e9 paralela \u00e0 dire\u00e7\u00e3o de lamina\u00e7\u00e3o da chapa met\u00e1lica.<\/li><li>O raio de curvatura da chapa met\u00e1lica \u00e9 muito pequeno.<\/li><\/ol><p>Durante o processo de produ\u00e7\u00e3o e fabrica\u00e7\u00e3o, \u00e9 necess\u00e1rio lidar com fen\u00f4menos de flex\u00e3o e rachadura de acordo com circunst\u00e2ncias espec\u00edficas. Para o problema de flex\u00e3o e rachadura na Figura 1, o m\u00e9todo de adicionar furos de processo ou ranhuras de processo pode ser adotado para resolv\u00ea-lo, conforme mostrado na Figura 2.<\/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-e6a6d17 elementor-widget elementor-widget-image\" data-id=\"e6a6d17\" 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=\"528\" height=\"404\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/adding-process-holes.jpg\" class=\"attachment-full size-full wp-image-3521\" alt=\"adicionando furos de processo\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/adding-process-holes.jpg 528w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/adding-process-holes-300x230.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/adding-process-holes-16x12.jpg 16w\" sizes=\"(max-width: 528px) 100vw, 528px\" \/>\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-f177be0 elementor-widget elementor-widget-text-editor\" data-id=\"f177be0\" 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 style=\"text-align: center;\">Figura 2: Adicionando furos de processo<\/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-932ee1f elementor-widget elementor-widget-heading\" data-id=\"932ee1f\" 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\">Interfer\u00eancia de flex\u00e3o<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b9e5ab0 elementor-widget elementor-widget-text-editor\" data-id=\"b9e5ab0\" 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 interfer\u00eancia de flex\u00e3o \u00e9 principalmente direcionada a produtos com flex\u00e3o secund\u00e1ria ou superior, onde a borda de flex\u00e3o colide com o molde ou equipamento, resultando na incapacidade de formar adequadamente. A interfer\u00eancia de flex\u00e3o \u00e9 principalmente influenciada pela forma, tamanho e molde das pe\u00e7as, e \u00e9 causada principalmente pela estrutura de design da pr\u00f3pria pe\u00e7a dobrada, a sequ\u00eancia de flex\u00e3o selecionada e o molde de flex\u00e3o selecionado. Portanto, as principais solu\u00e7\u00f5es incluem:<\/p><ol><li>fazer novos moldes ou substituir moldes (como moldes para facas de dobrar).<\/li><li>Transforma\u00e7\u00e3o de moldes de dobra (como processamento mec\u00e2nico de pe\u00e7as locais).<\/li><li>Ajuste a sequ\u00eancia de dobra (como o m\u00e9todo de deforma\u00e7\u00e3o reversa).<\/li><li>Altere o tamanho da curvatura das pe\u00e7as. Por exemplo, o suporte de instala\u00e7\u00e3o para o canal de acess\u00f3rios do chassi da Linha 18 do Metr\u00f4 de Xangai \u00e9 feito de a\u00e7o de canal em forma de U, com uma largura m\u00e9dia de 100 mm, altura da borda de 80 mm e um raio de curvatura de 15 mm. Simule a curvatura com base nos moldes existentes na oficina para gerar interfer\u00eancia de curvatura.<\/li><\/ol><p>\u00a0<\/p><p>Em resposta a esse fen\u00f4meno de interfer\u00eancia, um m\u00e9todo de processamento mec\u00e2nico local foi adotado para a matriz superior de dobra (veja a Figura 3). Um entalhe de 140 mm \u00d7 48 mm foi cortado ao longo da linha m\u00e9dia da matriz superior de faca reta R15 mm existente (L=800 mm) (veja a Figura 4). A posi\u00e7\u00e3o do entalhe foi determinada combinando-a com a posi\u00e7\u00e3o de interfer\u00eancia de dobra simulada, sem afetar sua fun\u00e7\u00e3o original. Ap\u00f3s modificar o molde de dobra, o problema de interfer\u00eancia de dobra foi resolvido com sucesso.<\/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-b6e692e elementor-widget elementor-widget-image\" data-id=\"b6e692e\" 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=\"377\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-after-upper-mold-processing.jpg\" class=\"attachment-full size-full wp-image-3523\" alt=\"dobra ap\u00f3s processamento do molde superior\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-after-upper-mold-processing.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-after-upper-mold-processing-300x174.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-after-upper-mold-processing-18x10.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-2404924 elementor-widget elementor-widget-text-editor\" data-id=\"2404924\" 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 style=\"text-align: center;\">Figura 3: Dobramento ap\u00f3s processamento do molde superior<\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b102e52 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b102e52\" 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-87646be\" data-id=\"87646be\" 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-39651d0 elementor-widget elementor-widget-image\" data-id=\"39651d0\" 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=\"250\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-interference-determining-the-processing-area.jpg\" class=\"attachment-full size-full wp-image-3524\" alt=\"interfer\u00eancia de flex\u00e3o, determinando a \u00e1rea de processamento\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-interference-determining-the-processing-area.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-interference-determining-the-processing-area-300x115.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-interference-determining-the-processing-area-18x7.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-3b3e2d9 elementor-widget elementor-widget-text-editor\" data-id=\"3b3e2d9\" 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 style=\"text-align: center;\">Figura 4: Interfer\u00eancia de flex\u00e3o, determinando a \u00e1rea de processamento<\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-9f18958 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"9f18958\" 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-a179511\" data-id=\"a179511\" 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-4f20412 elementor-widget elementor-widget-heading\" data-id=\"4f20412\" 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\">Recuo de flex\u00e3o<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a13b181 elementor-widget elementor-widget-text-editor\" data-id=\"a13b181\" 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 indenta\u00e7\u00e3o de dobra \u00e9 um fen\u00f4meno no qual o atrito \u00e9 gerado durante o processo de colocar gradualmente a chapa met\u00e1lica em contato com a superf\u00edcie interna da ranhura em forma de V do molde c\u00f4ncavo, resultando em marcas \u00f3bvias deixadas na superf\u00edcie da chapa met\u00e1lica. Para alguns acess\u00f3rios com altos requisitos de superf\u00edcie, a dobra tradicional n\u00e3o pode atender aos requisitos de qualidade do produto, e a indenta\u00e7\u00e3o de dobra (veja a Figura 5) n\u00e3o pode atender aos requisitos do pr\u00f3ximo processo.<\/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-0a7475e elementor-widget elementor-widget-image\" data-id=\"0a7475e\" 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=\"374\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-indentation.jpg\" class=\"attachment-full size-full wp-image-3525\" alt=\"recuo de flex\u00e3o\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-indentation.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-indentation-300x173.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-indentation-18x10.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-1e7f0c8 elementor-widget elementor-widget-text-editor\" data-id=\"1e7f0c8\" 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 style=\"text-align: center;\">Figura 5: Recuo de 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-d9ca80d elementor-widget elementor-widget-text-editor\" data-id=\"d9ca80d\" 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 indenta\u00e7\u00e3o de flex\u00e3o \u00e9 afetada principalmente pela dureza da chapa met\u00e1lica e pela estrutura do molde inferior. Quanto maior a dureza da chapa, maior sua capacidade de resistir \u00e0 deforma\u00e7\u00e3o pl\u00e1stica, tornando mais dif\u00edcil para o material sofrer deforma\u00e7\u00e3o pl\u00e1stica e mais f\u00e1cil produzir indenta\u00e7\u00e3o. A probabilidade de indenta\u00e7\u00e3o de flex\u00e3o em materiais de chapa comumente usados \u00e9: alum\u00ednio &gt; a\u00e7o carbono &gt; a\u00e7o inoxid\u00e1vel. Quanto maior a largura da abertura da matriz de dobra, maior a largura da indenta\u00e7\u00e3o de flex\u00e3o e menor a profundidade da indenta\u00e7\u00e3o. Quanto maior o tamanho R do ombro de abertura do molde inferior, menor a profundidade da indenta\u00e7\u00e3o.<\/p><p>Al\u00e9m de melhorar a dureza do material e a estrutura inferior do molde, almofadas de borracha anti-indenta\u00e7\u00e3o e moldes inferiores de dobra do tipo esfera tamb\u00e9m podem ser usados para resolver o problema de indenta\u00e7\u00e3o de dobra. A almofada de borracha anti-indenta\u00e7\u00e3o depende principalmente do isolamento f\u00edsico para reduzir a ocorr\u00eancia de indenta\u00e7\u00e3o, conforme mostrado na Figura 6. A matriz de dobra do tipo esfera transforma o atrito de extrus\u00e3o necess\u00e1rio para moldes de dobra tradicionais em atrito de rolamento, reduzindo o atrito e minimizando os danos ao produto, conforme mostrado na Figura 7.<\/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-6d05321 elementor-widget elementor-widget-image\" data-id=\"6d05321\" 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=\"350\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/anti-indentation-rubber-pad.jpg\" class=\"attachment-full size-full wp-image-3526\" alt=\"almofada de borracha anti-indenta\u00e7\u00e3o\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/anti-indentation-rubber-pad.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/anti-indentation-rubber-pad-300x162.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/anti-indentation-rubber-pad-18x10.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-aeb0ea2 elementor-widget elementor-widget-text-editor\" data-id=\"aeb0ea2\" 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 style=\"text-align: center;\">Figura 6: Almofada de borracha anti-indenta\u00e7\u00e3o<\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c9fe4f3 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c9fe4f3\" 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-fa70ec1\" data-id=\"fa70ec1\" 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-daf42ac elementor-widget elementor-widget-text-editor\" data-id=\"daf42ac\" 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 style=\"text-align: center;\">Figura 7: Molde inferior de flex\u00e3o de esferas<\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ad37e9d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ad37e9d\" 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-0373a73\" data-id=\"0373a73\" 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-7a04f86 elementor-widget elementor-widget-heading\" data-id=\"7a04f86\" 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\">Dobrando o retorno el\u00e1stico<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a906c0d elementor-widget elementor-widget-image\" data-id=\"a906c0d\" 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=\"541\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/ball-bending-lower-mold.jpg\" class=\"attachment-full size-full wp-image-3527\" alt=\"molde inferior de dobra de bola\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/ball-bending-lower-mold.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/ball-bending-lower-mold-300x250.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/ball-bending-lower-mold-14x12.jpg 14w\" 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-ca4f8d1 elementor-widget elementor-widget-text-editor\" data-id=\"ca4f8d1\" 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>Durante o processo de dobra, os materiais sofrem deforma\u00e7\u00e3o pl\u00e1stica e deforma\u00e7\u00e3o el\u00e1stica simultaneamente. Quando a pe\u00e7a de trabalho sai do molde de dobra, ocorre recupera\u00e7\u00e3o el\u00e1stica, fazendo com que o formato e o tamanho da pe\u00e7a dobrada sejam inconsistentes com a carga, o que \u00e9 chamado de rebote de dobra. <a href=\"https:\/\/www.shen-chong.com\/pt\/understanding-springback-in-sheet-metal-bending\/\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #3366ff;\">Retorno el\u00e1stico de flex\u00e3o<\/span><\/a><strong><b>\u00a0<\/b><\/strong>\u00e9 uma das principais raz\u00f5es para \u00e2ngulo de curvatura insuficiente. Os principais fatores que afetam o rebote s\u00e3o as propriedades mec\u00e2nicas da chapa met\u00e1lica e as condi\u00e7\u00f5es de deforma\u00e7\u00e3o da curvatura. A magnitude do valor do retorno el\u00e1stico \u00e9 diretamente proporcional \u00e0 resist\u00eancia ao escoamento da chapa met\u00e1lica e inversamente proporcional ao m\u00f3dulo de elasticidade. Quanto menor o raio de curvatura relativo (raz\u00e3o R\/t do raio de curvatura para a espessura da chapa) da pe\u00e7a dobrada, menor o valor do retorno el\u00e1stico de curvatura. O formato da pe\u00e7a dobrada tamb\u00e9m afeta a magnitude do valor do retorno el\u00e1stico de curvatura. Geralmente, pe\u00e7as em formato de U t\u00eam um valor de retorno el\u00e1stico menor do que pe\u00e7as em formato de V.<\/p><p>O principal m\u00e9todo para superar o retorno el\u00e1stico de flex\u00e3o \u00e9 o m\u00e9todo de compensa\u00e7\u00e3o de \u00e2ngulo, que geralmente adota o m\u00e9todo de fazer uma inclina\u00e7\u00e3o igual ao \u00e2ngulo de retorno el\u00e1stico no molde de flex\u00e3o, o que pode equilibrar efetivamente o impacto do retorno el\u00e1stico de flex\u00e3o. Conforme mostrado na Figura 8, usar um molde de flex\u00e3o com uma inclina\u00e7\u00e3o de 80\u00b0 pode dobrar suavemente pe\u00e7as de trabalho com um \u00e2ngulo de flex\u00e3o de 90\u00b0.<\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a39d395 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a39d395\" 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-0cae257\" data-id=\"0cae257\" 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-61d0c63 elementor-widget elementor-widget-image\" data-id=\"61d0c63\" 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=\"404\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-springback-compensation.jpg\" class=\"attachment-full size-full wp-image-3528\" alt=\"compensa\u00e7\u00e3o de retorno el\u00e1stico de flex\u00e3o\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-springback-compensation.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-springback-compensation-300x186.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/bending-springback-compensation-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-47d9b36 elementor-widget elementor-widget-text-editor\" data-id=\"47d9b36\" 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 style=\"text-align: center;\">Figura 8: Compensa\u00e7\u00e3o de retorno el\u00e1stico de flex\u00e3o<\/p><p>Devido aos muitos fatores que afetam o retorno el\u00e1stico de flex\u00e3o, \u00e9 muito dif\u00edcil calcular com precis\u00e3o o valor do retorno el\u00e1stico. Por meio da corre\u00e7\u00e3o do molde de teste e do ac\u00famulo de experi\u00eancia, dominar a lei do retorno el\u00e1stico, adotar a compensa\u00e7\u00e3o apropriada e tomar medidas para superar o retorno el\u00e1stico na estrutura do molde e outros aspectos s\u00e3o m\u00e9todos eficazes para garantir a qualidade do produto.<\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a5fc1e8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a5fc1e8\" 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-1ca75a0\" data-id=\"1ca75a0\" 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-c83c5b5 elementor-widget elementor-widget-heading\" data-id=\"c83c5b5\" 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\">Material de deslizamento de flex\u00e3o<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fc2c518 elementor-widget elementor-widget-text-editor\" data-id=\"fc2c518\" 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>Deslizamento de dobra refere-se ao fen\u00f4meno em que a pe\u00e7a a ser dobrada n\u00e3o tem um ponto de apoio completo e eficaz na ranhura inferior da matriz, resultando na propens\u00e3o da pe\u00e7a a escorregar e na incapacidade de posicionar corretamente a dobra.<\/p><p>As principais raz\u00f5es para a flex\u00e3o de materiais deslizantes s\u00e3o as seguintes.<\/p><ol><li>Quando a largura do molde inferior \u00e9 muito grande e o tamanho da curvatura \u00e9 menor que a metade da largura do molde inferior, ocorre deslizamento.<\/li><li>Quando a pe\u00e7a de trabalho \u00e9 afetada por seu formato e tamanho, e o tamanho de posicionamento do gabarito \u00e9 muito curto ou n\u00e3o h\u00e1 uma borda de posicionamento efetiva do gabarito, podem ocorrer fen\u00f4menos de flex\u00e3o e deslizamento.<\/li><\/ol><p>\u00a0<\/p><p>Existem dois m\u00e9todos principais para resolver o problema de flex\u00e3o e deslizamento de materiais.<\/p><ul><li>M\u00e9todo 1. Escolha uma matriz de dobra adequada, geralmente escolhendo uma largura de matriz de 4 a 6 vezes a espessura da placa a ser dobrada.<\/li><li>M\u00e9todo 2. Usando o m\u00e9todo de adicionar modelos ou bordas de processo, o problema de deslizamento do material causado por posicionamento ruim devido \u00e0 dobra pode ser resolvido. Em geral, a dobra \u00e9 posicionada por uma borda reta da pe\u00e7a de trabalho, o que requer que duas faces finais estejam em contato com o modelo de dobra para posicionamento. No entanto, no processo de produ\u00e7\u00e3o real, h\u00e1 situa\u00e7\u00f5es em que a borda do modelo do produto \u00e9 muito curta ou n\u00e3o h\u00e1 borda de posicionamento eficaz, resultando na incapacidade de concluir o posicionamento da dobra. As solu\u00e7\u00f5es s\u00e3o:<\/li><\/ul><p>\u00a0<\/p><ol><li>Quando a espessura da placa t \u2264 6 mm, adicione uma borda de processo para posicionamento, e a posi\u00e7\u00e3o da extens\u00e3o da borda de processo deve estar nivelada com a borda final do acess\u00f3rio. O corte a laser deve ser usado na jun\u00e7\u00e3o para facilitar a retifica\u00e7\u00e3o e a elimina\u00e7\u00e3o ap\u00f3s a conclus\u00e3o da opera\u00e7\u00e3o de dobra.<\/li><li>Quando a espessura da placa t for maior que 6 mm, um modelo pode ser cortado para posicionamento, e a espessura do modelo pode ser igual ou ligeiramente menor que a espessura da pe\u00e7a de trabalho. Ambos os m\u00e9todos de posicionamento podem resolver o problema de dobrar e deslizar materiais.<\/li><\/ol>\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8a55c1c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8a55c1c\" 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-21dad55\" data-id=\"21dad55\" 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-c95b1a7 elementor-widget elementor-widget-heading\" data-id=\"c95b1a7\" 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\">Grande arco de flex\u00e3o<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0739f51 elementor-widget elementor-widget-text-editor\" data-id=\"0739f51\" 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>Durante o processo de produ\u00e7\u00e3o e fabrica\u00e7\u00e3o, \u00e9 comum encontrar situa\u00e7\u00f5es em que o raio de curvatura da pe\u00e7a de trabalho \u00e9 grande e n\u00e3o h\u00e1 um molde de arco grande correspondente na oficina. Nesse caso, o ciclo de produ\u00e7\u00e3o de moldes de conforma\u00e7\u00e3o integral ou moldes de arco grande \u00e9 mais longo e o custo \u00e9 muito alto, enquanto o uso da tecnologia de conforma\u00e7\u00e3o de dobra de m\u00faltiplas passagens de arco pequeno tem menor custo e aplicabilidade mais ampla. Por exemplo, no projeto Super Bus 2.0, h\u00e1 um componente com uma placa vertical e tr\u00eas placas verticais, com um raio de curvatura de 125 mm e um \u00e2ngulo de curvatura de 90 \u00b0, conforme mostrado na Figura 9. Devido \u00e0 falta de moldes de curvatura correspondentes na oficina, v\u00e1rios processos de curvatura podem ser usados. Primeiramente, um software 3D foi usado para modelar o layout e a curvatura na posi\u00e7\u00e3o R125 mm. Ap\u00f3s a modelagem, o software desdobrou automaticamente o diagrama de placa plana 2D. Ao inserir um raio de curvatura de 45 mm no software e comparar m\u00faltiplas entradas de dados, foi confirmado que o segmento de arco circular poderia ser garantido pela curvatura com 8 cortes. Ent\u00e3o, os dados de curvatura (\u00e2ngulo de curvatura, comprimento da posi\u00e7\u00e3o da linha de curvatura) para cada corte foram gerados, como mostrado na Figura 10. Finalmente, a curvatura de teste no local foi conduzida com base nos dados de curvatura, como mostrado na Figura 11.<\/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-606ed60 elementor-widget elementor-widget-image\" data-id=\"606ed60\" 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=\"435\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/arc-shaped-workpieces.jpg\" class=\"attachment-full size-full wp-image-3529\" alt=\"pe\u00e7as em forma de arco\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/arc-shaped-workpieces.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/arc-shaped-workpieces-300x201.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/arc-shaped-workpieces-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-9acf25a elementor-widget elementor-widget-text-editor\" data-id=\"9acf25a\" 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 style=\"text-align: center;\">Figura 9: Pe\u00e7as em forma de arco<\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c422e09 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c422e09\" 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-c1d5c11\" data-id=\"c1d5c11\" 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-c5d9531 elementor-widget elementor-widget-image\" data-id=\"c5d9531\" 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=\"579\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/unfolding-diagram-and-bending-line-position.jpg\" class=\"attachment-full size-full wp-image-3530\" alt=\"diagrama de desdobramento e posi\u00e7\u00e3o da linha de dobra\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/unfolding-diagram-and-bending-line-position.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/unfolding-diagram-and-bending-line-position-300x267.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/unfolding-diagram-and-bending-line-position-13x12.jpg 13w\" 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-92a80cf elementor-widget elementor-widget-text-editor\" data-id=\"92a80cf\" 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 style=\"text-align: center;\">Figura 10: Diagrama de desdobramento e posi\u00e7\u00e3o da linha de dobra<\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-393cbcb elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"393cbcb\" 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-4f18bcf\" data-id=\"4f18bcf\" 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-df8ea84 elementor-widget elementor-widget-image\" data-id=\"df8ea84\" 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=\"870\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/on-site-trial-mold-bending.jpg\" class=\"attachment-full size-full wp-image-3531\" alt=\"teste de dobra de molde no local\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/on-site-trial-mold-bending.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/on-site-trial-mold-bending-224x300.jpg 224w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/on-site-trial-mold-bending-9x12.jpg 9w\" 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-cf3b8a5 elementor-widget elementor-widget-text-editor\" data-id=\"cf3b8a5\" 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 style=\"text-align: center;\">Figura 11: Teste de dobra do molde no local<\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3fb0a2a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3fb0a2a\" 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-8c2b675\" data-id=\"8c2b675\" 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-4793c8c elementor-widget elementor-widget-heading\" data-id=\"4793c8c\" 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\">Protrus\u00e3o de flex\u00e3o<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-37296fd elementor-widget elementor-widget-text-editor\" data-id=\"37296fd\" 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>Protrus\u00e3o de curvatura refere-se ao fen\u00f4meno em que o material met\u00e1lico se projeta em ambos os lados do canto dobrado da chapa met\u00e1lica devido \u00e0 compress\u00e3o do material, resultando em uma largura maior do que o tamanho original. O tamanho da protrus\u00e3o de curvatura geralmente est\u00e1 relacionado \u00e0 espessura da placa acess\u00f3ria e ao raio de curvatura. Quanto mais espessa a placa, menor o raio de curvatura e mais \u00f3bvia a protrus\u00e3o.<\/p><p>Para evitar esse problema de qualidade de dobra, entalhes de processo podem ser adicionados em ambos os lados da linha de dobra durante o desenho do diagrama de desdobramento de dobra, conforme mostrado na Figura 12. A lacuna do processo geralmente tem a forma de um arco circular, com um di\u00e2metro de pelo menos 1,5 vezes a espessura da pe\u00e7a de trabalho, para compensar a sali\u00eancia de dobra e resolver efetivamente o problema da sali\u00eancia de dobra. Para pe\u00e7as de trabalho que j\u00e1 produziram sali\u00eancias de dobra, o polimento manual \u00e9 geralmente usado para processamento.<\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6f7d5ac elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6f7d5ac\" 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-94a3f5e\" data-id=\"94a3f5e\" 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-804da69 elementor-widget elementor-widget-image\" data-id=\"804da69\" 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=\"374\" src=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/process-gap.jpg\" class=\"attachment-full size-full wp-image-3532\" alt=\"lacuna do processo\" srcset=\"https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/process-gap.jpg 650w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/process-gap-300x173.jpg 300w, https:\/\/www.shen-chong.com\/wp-content\/uploads\/2024\/09\/process-gap-18x10.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-acaac98 elementor-widget elementor-widget-text-editor\" data-id=\"acaac98\" 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 style=\"text-align: center;\">Figura 12: Lacuna de processo<\/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-e6973e6 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"e6973e6\" 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-4f92c87 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4f92c87\" 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-bc9b3ec\" data-id=\"bc9b3ec\" 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-20cb8f4 elementor-widget elementor-widget-heading\" data-id=\"20cb8f4\" 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-36668e0 elementor-widget elementor-widget-text-editor\" data-id=\"36668e0\" 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>Deve-se notar que os problemas comuns de qualidade de dobra e corte listados acima na pr\u00e1tica de produ\u00e7\u00e3o n\u00e3o levaram em considera\u00e7\u00e3o o impacto de fatores humanos ou de equipamentos (como dimens\u00f5es de desdobramento incorretas, sele\u00e7\u00e3o incorreta de par\u00e2metros de dobra e envelhecimento do equipamento). Na pr\u00e1tica de produ\u00e7\u00e3o, os par\u00e2metros apropriados do processo de dobra devem ser selecionados com base no desempenho do equipamento, tamanho do produto e caracter\u00edsticas do material, e executados rigorosamente de acordo com as especifica\u00e7\u00f5es operacionais. N\u00e3o precisamos apenas considerar de forma abrangente o impacto de v\u00e1rios fatores, como progresso do projeto, custo e qualidade, e adotar m\u00e9todos apropriados para resolver problemas de qualidade de dobra, mas tamb\u00e9m precisamos acumular experi\u00eancia para prever a ocorr\u00eancia e o impacto de problemas de dobra no est\u00e1gio de an\u00e1lise do processo e tomar medidas direcionadas para preveni-los. Este artigo lista v\u00e1rios problemas comuns de qualidade de dobra e suas solu\u00e7\u00f5es, na esperan\u00e7a de fornecer alguma refer\u00eancia e orienta\u00e7\u00e3o para colegas da ind\u00fastria.<\/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-0706f84 elementor-widget elementor-widget-text-editor\" data-id=\"0706f84\" 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>Leia mais:<\/strong><\/p><p><a href=\"https:\/\/www.shen-chong.com\/pt\/pressione-o-freio\/\" target=\"_blank\" rel=\"noopener\">M\u00e1quina de dobradeira hidr\u00e1ulica<\/a><\/p><p><a href=\"https:\/\/www.shen-chong.com\/pt\/what-are-the-k-factor-bend-allowance-and-bend-deduction\/\" target=\"_blank\" rel=\"noopener\">O que s\u00e3o o fator K, a toler\u00e2ncia de curvatura e a dedu\u00e7\u00e3o de curvatura?<\/a><\/p><p><a href=\"https:\/\/www.shen-chong.com\/pt\/comprehensive-introduction-sheet-metal-bending\/\" target=\"_blank\" rel=\"noopener\">Introdu\u00e7\u00e3o abrangente: dobra 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 Durante o processo de produ\u00e7\u00e3o e fabrica\u00e7\u00e3o, v\u00e1rios problemas de qualidade de dobra podem surgir ao dobrar pe\u00e7as de chapa met\u00e1lica, o que pode afetar a melhoria da efici\u00eancia da produ\u00e7\u00e3o e a estabilidade da qualidade do produto. Este artigo elabora problemas comuns de qualidade de dobra e corte na pr\u00e1tica de produ\u00e7\u00e3o, analisa as causas dos problemas e prop\u00f5e solu\u00e7\u00f5es para fornecer [\u2026]<\/p>","protected":false},"author":1,"featured_media":3518,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3517","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>Common Bending Quality Problems And Solutions - SC Machinery<\/title>\n<meta name=\"description\" content=\"Bending quality problems may arise when bending sheet metal parts, which can affect the production efficiency and product quality.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.shen-chong.com\/pt\/common-bending-quality-problems-and-solutions\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Common Bending Quality Problems And Solutions - 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