{"id":2287,"date":"2026-07-17T12:34:55","date_gmt":"2026-07-17T05:34:55","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/chan-inox-nut-bien-dang-sai-goc-nguyen-nhan-va-khac-phuc\/"},"modified":"2026-07-17T12:34:55","modified_gmt":"2026-07-17T05:34:55","slug":"chan-inox-nut-bien-dang-sai-goc-nguyen-nhan-va-khac-phuc","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/chan-inox-nut-bien-dang-sai-goc-nguyen-nhan-va-khac-phuc\/","title":{"rendered":"Ch\u1ea5n Inox n\u1ee9t, bi\u1ebfn d\u1ea1ng, sai g\u00f3c: nguy\u00ean nh\u00e2n v\u00e0 kh\u1eafc ph\u1ee5c"},"content":{"rendered":"\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-top\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;2287&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;top&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;0&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;0&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;\u0110\u00e1nh gi\u00e1&quot;,&quot;legend&quot;:&quot;0\\\/5 - (0 b\u00ecnh ch\u1ecdn)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;Ch\u1ea5n Inox n\u1ee9t, bi\u1ebfn d\u1ea1ng, sai g\u00f3c: nguy\u00ean nh\u00e2n v\u00e0 kh\u1eafc ph\u1ee5c&quot;,&quot;width&quot;:&quot;0&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div 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class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            <span class=\"kksr-muted\">\u0110\u00e1nh gi\u00e1<\/span>\n    <\/div>\n    <\/div>\n<div class=\"custom-toc\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/inoxcuongthinh.com\/chan-inox-nut-bien-dang-sai-goc-nguyen-nhan-va-khac-phuc\/#Noi_dung_chinh\" >N\u1ed9i dung ch\u00ednh<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/inoxcuongthinh.com\/chan-inox-nut-bien-dang-sai-goc-nguyen-nhan-va-khac-phuc\/#Vi_sao_chan_Inox_de_phat_sinh_loi\" >V\u00ec sao ch\u1ea5n Inox d\u1ec5 ph\u00e1t sinh l\u1ed7i?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/inoxcuongthinh.com\/chan-inox-nut-bien-dang-sai-goc-nguyen-nhan-va-khac-phuc\/#Ba_loi_dien_hinh_va_cach_khac_phuc_triet_de\" >Ba l\u1ed7i \u0111i\u1ec3n h\u00ecnh v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c tri\u1ec7t \u0111\u1ec3<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/inoxcuongthinh.com\/chan-inox-nut-bien-dang-sai-goc-nguyen-nhan-va-khac-phuc\/#Loi_1_Nut_mep_hoac_day_gap\" >L\u1ed7i 1: N\u1ee9t m\u00e9p ho\u1eb7c \u0111\u00e1y g\u1ea5p<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/inoxcuongthinh.com\/chan-inox-nut-bien-dang-sai-goc-nguyen-nhan-va-khac-phuc\/#Loi_2_Bien_dang_than_chi_tiet_cong_%E2%80%9Cbanana%E2%80%9D_venh_xoan_lom_mat\" >L\u1ed7i 2: Bi\u1ebfn d\u1ea1ng th\u00e2n chi ti\u1ebft (cong \u201cbanana\u201d, v\u00eanh, xo\u1eafn, l\u00f5m m\u1eb7t)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/inoxcuongthinh.com\/chan-inox-nut-bien-dang-sai-goc-nguyen-nhan-va-khac-phuc\/#Loi_3_Sai_goc_rai_goc_theo_chieu_dai_do_springback_va_sai_so_luc\" >L\u1ed7i 3: Sai g\u00f3c, r\u1ea3i g\u00f3c theo chi\u1ec1u d\u00e0i (do springback v\u00e0 sai s\u1ed1 l\u1ef1c)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/inoxcuongthinh.com\/chan-inox-nut-bien-dang-sai-goc-nguyen-nhan-va-khac-phuc\/#Thong_so_khuyen_nghi_thuc_hanh\" >Th\u00f4ng s\u1ed1 khuy\u1ebfn ngh\u1ecb th\u1ef1c h\u00e0nh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/inoxcuongthinh.com\/chan-inox-nut-bien-dang-sai-goc-nguyen-nhan-va-khac-phuc\/#Vi_du_tinh_nhanh_bend_allowance_va_quy_trinh_chuan\" >V\u00ed d\u1ee5 t\u00ednh nhanh bend allowance v\u00e0 quy tr\u00ecnh chu\u1ea9n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/inoxcuongthinh.com\/chan-inox-nut-bien-dang-sai-goc-nguyen-nhan-va-khac-phuc\/#Quy_trinh_kiem_soat_loi_theo_tung_buoc\" >Quy tr\u00ecnh ki\u1ec3m so\u00e1t l\u1ed7i theo t\u1eebng b\u01b0\u1edbc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/inoxcuongthinh.com\/chan-inox-nut-bien-dang-sai-goc-nguyen-nhan-va-khac-phuc\/#Cau_hoi_thuong_gap\" >C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/inoxcuongthinh.com\/chan-inox-nut-bien-dang-sai-goc-nguyen-nhan-va-khac-phuc\/#Nguon_tham_khao\" >Ngu\u1ed3n tham kh\u1ea3o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/inoxcuongthinh.com\/chan-inox-nut-bien-dang-sai-goc-nguyen-nhan-va-khac-phuc\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"Noi_dung_chinh\"><\/span>N\u1ed9i dung ch\u00ednh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><a href=\"#toc-0-vi-sao-chan-inox-de-phat-sinh-loi\">V\u00ec sao ch\u1ea5n Inox d\u1ec5 ph\u00e1t sinh l\u1ed7i?<\/a><\/li>\n<li><a href=\"#toc-1-ba-loi-dien-hinh-va-cach-khac-phuc-triet-de\">Ba l\u1ed7i \u0111i\u1ec3n h\u00ecnh v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c tri\u1ec7t \u0111\u1ec3<\/a><\/li>\n<li><a href=\"#toc-2-thong-so-khuyen-nghi-thuc-hanh\">Th\u00f4ng s\u1ed1 khuy\u1ebfn ngh\u1ecb th\u1ef1c h\u00e0nh<\/a><\/li>\n<li><a href=\"#toc-3-vi-du-tinh-nhanh-bend-allowance-va-quy-trinh-chuan\">V\u00ed d\u1ee5 t\u00ednh nhanh bend allowance v\u00e0 quy tr\u00ecnh chu\u1ea9n<\/a><\/li>\n<li><a href=\"#toc-4-quy-trinh-kiem-soat-loi-theo-tung-buoc\">Quy tr\u00ecnh ki\u1ec3m so\u00e1t l\u1ed7i theo t\u1eebng b\u01b0\u1edbc<\/a><\/li>\n<li><a href=\"#toc-5-cau-hoi-thuong-gap\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li>\n<li><a href=\"#toc-6-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-7-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Ch\u1ea5n Inox l\u00e0 c\u00f4ng \u0111o\u1ea1n quy\u1ebft \u0111\u1ecbnh h\u00ecnh d\u1ea1ng v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a chi ti\u1ebft trong chu\u1ed7i gia c\u00f4ng Inox (c\u1eaft, ch\u1ea5n, d\u1eadp, l\u1ed1c). B\u00e0i vi\u1ebft n\u00e0y \u0111i th\u1eb3ng v\u00e0o 3 l\u1ed7i g\u00e2y \u0111au \u0111\u1ea7u nh\u1ea5t khi ch\u1ea5n Inox \u2014 n\u1ee9t, bi\u1ebfn d\u1ea1ng, sai g\u00f3c \u2014 k\u00e8m nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5, th\u00f4ng s\u1ed1 khuy\u1ebfn ngh\u1ecb v\u00e0 quy tr\u00ecnh x\u1eed l\u00fd tri\u1ec7t \u0111\u1ec3 cho th\u1ee3 m\u00e1y, k\u1ef9 s\u01b0 v\u00e0 ch\u1ee7 x\u01b0\u1edfng.<\/p>\n<h2 id=\"toc-0-vi-sao-chan-inox-de-phat-sinh-loi\"><span class=\"ez-toc-section\" id=\"Vi_sao_chan_Inox_de_phat_sinh_loi\"><\/span>V\u00ec sao ch\u1ea5n Inox d\u1ec5 ph\u00e1t sinh l\u1ed7i?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; \u0110\u1ed9 h\u00f3a b\u1ec1n bi\u1ebfn d\u1ea1ng cao: AISI 304\/316 c\u00f3 h\u1ec7 s\u1ed1 h\u00f3a b\u1ec1n l\u1edbn; l\u1ef1c ch\u1ea5n t\u0103ng nhanh theo m\u1ee9c bi\u1ebfn d\u1ea1ng, l\u00e0m m\u00e9p g\u1ea5p d\u1ec5 n\u1ee9t n\u1ebfu b\u00e1n k\u00ednh trong qu\u00e1 nh\u1ecf.<br \/>\n&#8211; \u0110\u1ed9 \u0111\u00e0n h\u1ed3i tr\u1edf l\u1ea1i (springback) l\u1edbn: Inox th\u01b0\u1eddng b\u1eadt g\u00f3c 1.5\u20132 l\u1ea7n so v\u1edbi th\u00e9p cacbon, g\u00e2y sai g\u00f3c v\u00e0 r\u1ea3i g\u00f3c theo chi\u1ec1u d\u00e0i n\u1ebfu kh\u00f4ng b\u00f9 ch\u00ednh x\u00e1c.<br \/>\n&#8211; T\u00ednh d\u1ecb h\u01b0\u1edbng theo h\u01b0\u1edbng c\u00e1n: B\u1ebb theo h\u01b0\u1edbng th\u1edb c\u00e1n (song song) d\u1ec5 n\u1ee9t h\u01a1n b\u1ebb vu\u00f4ng g\u00f3c; b\u00e1n k\u00ednh t\u1ed1i thi\u1ec3u ph\u1ea3i t\u0103ng n\u1ebfu b\u1ebb theo th\u1edb.<br \/>\n&#8211; Nh\u1ea1y c\u1ea3m b\u1ec1 m\u1eb7t: D\u1ec5 x\u01b0\u1edbc\/galling v\u1edbi khu\u00f4n kh\u00f4ng ph\u00f9 h\u1ee3p ho\u1eb7c kh\u00f4ng b\u00f4i tr\u01a1n; l\u1edbp film b\u1ea3o v\u1ec7 v\u00e0 ho\u00e0n thi\u1ec7n No.4\/HL\/Mirror c\u1ea7n k\u1ef9 thu\u1eadt ri\u00eang.<\/p>\n<p>Th\u00f4ng s\u1ed1 v\u1eadt li\u1ec7u tham kh\u1ea3o (tr\u1ea1ng th\u00e1i \u1ee7 \u2013 annealed):<br \/>\n&#8211; 304: Rp0.2 \u2248 210\u2013310 MPa; Rm \u2248 520\u2013750 MPa; springback cao<br \/>\n&#8211; 316: Rp0.2 \u2248 220\u2013320 MPa; Rm \u2248 530\u2013760 MPa; d\u1ebbo t\u1ed1t h\u01a1n 304 \u1edf m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t<br \/>\n&#8211; 430 (ferit): gi\u00f2n h\u01a1n 304; t\u0103ng b\u00e1n k\u00ednh g\u1ea5p<br \/>\n&#8211; 410\/420 (mactenxit): r\u1ea5t d\u1ec5 n\u1ee9t; c\u1ea7n b\u00e1n k\u00ednh l\u1edbn v\u00e0 ki\u1ec3m so\u00e1t c\u1ea1nh c\u1eaft<\/p>\n<h2 id=\"toc-1-ba-loi-dien-hinh-va-cach-khac-phuc-triet-de\"><span class=\"ez-toc-section\" id=\"Ba_loi_dien_hinh_va_cach_khac_phuc_triet_de\"><\/span>Ba l\u1ed7i \u0111i\u1ec3n h\u00ecnh v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c tri\u1ec7t \u0111\u1ec3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Loi_1_Nut_mep_hoac_day_gap\"><\/span>L\u1ed7i 1: N\u1ee9t m\u00e9p ho\u1eb7c \u0111\u00e1y g\u1ea5p<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Nh\u1eadn di\u1ec7n<br \/>\n&#8211; N\u1ee9t d\u1ecdc theo \u0111\u01b0\u1eddng g\u1ea5p (m\u1eb7t ngo\u00e0i) ho\u1eb7c n\u1ee9t ch\u00e2n g\u1ea5p; \u0111\u00f4i khi ch\u1ec9 l\u00e0 vi n\u1ee9t, l\u1ed9 sau khi bead-blast ho\u1eb7c th\u1ee5 \u0111\u1ed9ng h\u00f3a.<\/p>\n<p>Nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5<br \/>\n&#8211; B\u00e1n k\u00ednh trong qu\u00e1 nh\u1ecf so v\u1edbi chi\u1ec1u d\u00e0y v\u00e0 c\u1ea5p v\u1eadt li\u1ec7u.<br \/>\n&#8211; B\u1ebb theo h\u01b0\u1edbng th\u1edb c\u00e1n.<br \/>\n&#8211; M\u00e9p c\u1eaft c\u00f3 ba via\/kh\u00eda s\u1eafc, v\u00f9ng \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t (HAZ) do c\u1eaft laser oxy l\u00e0m \u201cc\u1ee9ng\u201d r\u00eca.<br \/>\n&#8211; Ch\u1ecdn V-die qu\u00e1 h\u1eb9p, ch\u00e0y qu\u00e1 nh\u1ecdn; coining\/bottoming qu\u00e1 m\u1ee9c.<br \/>\n&#8211; L\u1ed7\/c\u1eeda s\u1ed5 qu\u00e1 g\u1ea7n \u0111\u01b0\u1eddng g\u1ea5p; h\u00e0n\/ch\u1eafp ngay v\u1ecb tr\u00ed g\u1ea5p.<\/p>\n<p>Kh\u1eafc ph\u1ee5c<br \/>\n&#8211; Thi\u1ebft k\u1ebf v\u00e0 chu\u1ea9n b\u1ecb ph\u00f4i:<br \/>\n  &#8211; T\u0103ng b\u00e1n k\u00ednh trong: 304\/316 n\u00ean Rmin \u2248 1.0\u20131.5t khi b\u1ebb vu\u00f4ng g\u00f3c th\u1edb; 1.5\u20133.0t khi b\u1ebb theo th\u1edb. 430: 1.5\u20132.0t; 410\/420: 2.0\u20133.0t ho\u1eb7c h\u01a1n t\u00f9y chi\u1ec1u d\u00e0y.<br \/>\n  &#8211; Kho\u1ea3ng c\u00e1ch l\u1ed7\/bi\u00ean \u0111\u1ebfn \u0111\u01b0\u1eddng g\u1ea5p \u2265 1.5R + t (t\u1ed1i thi\u1ec3u 3t n\u1ebfu ch\u01b0a c\u00f3 d\u1eef li\u1ec7u th\u1ef1c nghi\u1ec7m).<br \/>\n  &#8211; Bo\/pha m\u00e9p, lo\u1ea1i b\u1ecf ba via; l\u00fd t\u01b0\u1edfng bo c\u1ea1nh r \u2248 0.1\u20130.2t tr\u01b0\u1edbc khi g\u1ea5p.<br \/>\n  &#8211; \u01afu ti\u00ean b\u1ebb vu\u00f4ng g\u00f3c th\u1edb c\u00e1n; \u0111\u00e1nh d\u1ea5u h\u01b0\u1edbng c\u00e1n tr\u00ean ph\u00f4i.<br \/>\n  &#8211; Tr\u00e1nh b\u1ebb qua m\u1ed1i h\u00e0n; n\u1ebfu b\u1eaft bu\u1ed9c, m\u00e0i ph\u1eb3ng v\u00e0 th\u1eed nghi\u1ec7m tr\u01b0\u1edbc.<br \/>\n&#8211; D\u1ee5ng c\u1ee5 v\u00e0 ph\u01b0\u01a1ng ph\u00e1p:<br \/>\n  &#8211; V-die cho Inox: ch\u1ecdn V \u2248 8\u00d7t (m\u1ecfng) \u0111\u1ebfn 10\u00d7t (d\u00e0y) \u0111\u1ec3 gi\u1ea3m bi\u1ebfn d\u1ea1ng t\u1eadp trung.<br \/>\n  &#8211; B\u00e1n k\u00ednh ch\u00e0y: rP \u2265 R y\u00eau c\u1ea7u; v\u1edbi 304\/316 n\u00ean rP \u2248 0.8\u20131.2t ho\u1eb7c l\u1edbn h\u01a1n.<br \/>\n  &#8211; \u01afu ti\u00ean ch\u1ea5n \u201cair bending\u201d \u0111\u00fang chu\u1ea9n; h\u1ea1n ch\u1ebf coining to\u00e0n ph\u1ea7n tr\u1eeb khi c\u1ea7n R r\u1ea5t nh\u1ecf (ki\u1ec3m tra l\u1ef1c ch\u1ea5n v\u00e0 r\u1ee7i ro n\u1ee9t).<br \/>\n  &#8211; D\u00f9ng khu\u00f4n \u0111\u00e3 \u0111\u00e1nh b\u00f3ng\/nitrided; b\u00f4i tr\u01a1n kh\u00f4ng chlorine \u0111\u1ec3 gi\u1ea3m galling.<br \/>\n&#8211; Quy tr\u00ecnh:<br \/>\n  &#8211; D\u00f9ng N2 khi c\u1eaft laser Inox; n\u1ebfu \u0111\u00e3 c\u1eaft O2, m\u00e0i s\u1ea1ch l\u1edbp oxit\/HAZ d\u1ecdc bi\u00ean g\u1ea5p.<br \/>\n  &#8211; L\u00e0m m\u1eabu th\u1eed c\u00f9ng l\u00f4 v\u1eadt li\u1ec7u\/thickness; ki\u1ec3m tra vi n\u1ee9t b\u1eb1ng th\u1ea9m th\u1ea5u m\u00e0u (PT) cho chi ti\u1ebft quan tr\u1ecdng.<br \/>\n  &#8211; V\u1edbi martensitic d\u00e0y, m\u1ed9t s\u1ed1 x\u01b0\u1edfng \u00e1p d\u1ee5ng gia nhi\u1ec7t nh\u1eb9 100\u2013150\u00b0C tr\u01b0\u1edbc khi g\u1ea5p \u0111\u1ec3 gi\u1ea3m n\u1ee9t; c\u1ea7n \u0111\u00e1nh gi\u00e1 r\u1ee7i ro bi\u1ebfn m\u00e0u b\u1ec1 m\u1eb7t.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Loi_2_Bien_dang_than_chi_tiet_cong_%E2%80%9Cbanana%E2%80%9D_venh_xoan_lom_mat\"><\/span>L\u1ed7i 2: Bi\u1ebfn d\u1ea1ng th\u00e2n chi ti\u1ebft (cong \u201cbanana\u201d, v\u00eanh, xo\u1eafn, l\u00f5m m\u1eb7t)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Nh\u1eadn di\u1ec7n<br \/>\n&#8211; G\u00f3c \u0111\u00fang \u1edf gi\u1eefa nh\u01b0ng m\u1edf \u1edf hai \u0111\u1ea7u (ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i).<br \/>\n&#8211; M\u00e9p b\u00edch d\u00e0i b\u1ecb \u201cbow\u201d ho\u1eb7c xo\u1eafn; b\u1ec1 m\u1eb7t c\u00f3 v\u1ebft in vai khu\u00f4n, x\u01b0\u1edbc\/galling.<\/p>\n<p>Nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5<br \/>\n&#8211; V\u00f5ng m\u00e1y v\u00e0 thi\u1ebfu crowning; l\u1ef1c ph\u00e2n b\u1ed1 kh\u00f4ng \u0111\u1ec1u theo chi\u1ec1u d\u00e0i.<br \/>\n&#8211; Flange d\u00e0i kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ee1; th\u1ee9 t\u1ef1 g\u1ea5p kh\u00f4ng h\u1ee3p l\u00fd g\u00e2y t\u00edch l\u0169y \u1ee9ng su\u1ea5t.<br \/>\n&#8211; V-die qu\u00e1 h\u1eb9p, vai s\u1eafc in d\u1ea5u; ma s\u00e1t cao; ph\u00f4i kh\u00f4ng ph\u1eb3ng (c\u1eaft nhi\u1ec7t g\u00e2y cong).<br \/>\n&#8211; D\u1ea1ng h\u00ecnh b\u1ea5t \u0111\u1ed1i x\u1ee9ng, l\u1ed7 r\u1ed7ng l\u1edbn l\u1ec7ch t\u00e2m l\u00e0m m\u1ea5t c\u00e2n b\u1eb1ng.<\/p>\n<p>Kh\u1eafc ph\u1ee5c<br \/>\n&#8211; M\u00e1y v\u00e0 g\u00e1 k\u1eb9p:<br \/>\n  &#8211; S\u1eed d\u1ee5ng crowning theo chi\u1ec1u d\u00e0i; shim c\u00e1c \u0111o\u1ea1n b\u1ecb h\u1edf s\u00e1ng.<br \/>\n  &#8211; Ki\u1ec3m chu\u1ea9n song song ch\u00e0y\u2013c\u1ed1i; \u0111\u1eb7t t\u1ea3i \u1edf v\u1ecb tr\u00ed gi\u1eefa; tr\u00e1nh \u0111\u1ed9t ng\u1ed9t t\u0103ng l\u1ef1c.<br \/>\n  &#8211; D\u00f9ng tay \u0111\u1ee1\/roller support cho b\u00edch d\u00e0i; gi\u1ea3m t\u1ed1c \u0111\u1ed9 khi qua \u0111i\u1ec3m ch\u1ea3y, th\u00eam th\u1eddi gian d\u1eebng (dwell) ng\u1eafn.<br \/>\n&#8211; D\u1ee5ng c\u1ee5 v\u00e0 b\u1ec1 m\u1eb7t:<br \/>\n  &#8211; M\u1edf r\u1ed9ng V-die trong gi\u1edbi h\u1ea1n cho ph\u00e9p \u0111\u1ec3 gi\u1ea3m d\u1ea5u in; d\u00f9ng vai c\u1ed1i c\u00f3 b\u00e1n k\u00ednh bo; ph\u1ee7 phim b\u1ea3o v\u1ec7 ho\u1eb7c ch\u00eam polyurethan.<br \/>\n  &#8211; B\u00f4i tr\u01a1n b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac; d\u00f9ng khu\u00f4n b\u00f3ng\/nitrided \u0111\u1ec3 gi\u1ea3m galling.<br \/>\n&#8211; Quy tr\u00ecnh v\u00e0 thi\u1ebft k\u1ebf:<br \/>\n  &#8211; Tr\u00ecnh t\u1ef1 g\u1ea5p t\u1eeb trong ra ngo\u00e0i; xen k\u1ebd hai ph\u00eda \u0111\u1ec3 c\u00e2n b\u1eb1ng \u1ee9ng su\u1ea5t.<br \/>\n  &#8211; C\u00e2n \u0111\u1ed1i l\u1ed7\/c\u1eaft m\u1edf; b\u1ed5 sung r\u00e3nh relief \u1edf ch\u00e2n g\u1ea5p khi c\u1ea7n.<br \/>\n  &#8211; Leveling\/ph\u1eb3ng ph\u00f4i tr\u01b0\u1edbc khi g\u1ea5p; v\u1edbi ph\u00f4i c\u1eaft laser, l\u00e0m ngu\u1ed9i ph\u1eb3ng ho\u1eb7c n\u1eafn s\u01a1 b\u1ed9.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Loi_3_Sai_goc_rai_goc_theo_chieu_dai_do_springback_va_sai_so_luc\"><\/span>L\u1ed7i 3: Sai g\u00f3c, r\u1ea3i g\u00f3c theo chi\u1ec1u d\u00e0i (do springback v\u00e0 sai s\u1ed1 l\u1ef1c)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Nh\u1eadn di\u1ec7n<br \/>\n&#8211; G\u00f3c nh\u1ecf\/l\u1edbn h\u01a1n y\u00eau c\u1ea7u sau nh\u1ea3 t\u1ea3i; g\u00f3c thay \u0111\u1ed5i d\u1ecdc theo chi\u1ec1u d\u00e0i ho\u1eb7c gi\u1eefa c\u00e1c ph\u00f4i.<\/p>\n<p>Nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5<br \/>\n&#8211; Kh\u00f4ng b\u00f9 springback \u0111\u1ee7; v\u1eadt li\u1ec7u v\u00e0 chi\u1ec1u d\u00e0y bi\u1ebfn thi\u00ean theo l\u00f4.<br \/>\n&#8211; V-die, ch\u00e0y kh\u00e1c nhau\/hao m\u00f2n; ma s\u00e1t thay \u0111\u1ed5i do film b\u1ea3o v\u1ec7.<br \/>\n&#8211; V\u00f5ng m\u00e1y; thi\u1ebfu \u0111o g\u00f3c t\u1ea1i ch\u1ed7; t\u1ed1c \u0111\u1ed9\/\u0111\u1ed9 d\u1eebng kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p>\n<p>Kh\u1eafc ph\u1ee5c<br \/>\n&#8211; B\u00f9 g\u00f3c:<br \/>\n  &#8211; G\u1ea5p \u201cqu\u00e1 g\u00f3c\u201d c\u00f3 ki\u1ec3m so\u00e1t. V\u1edbi 304\/316, 90\u00b0 th\u01b0\u1eddng c\u1ea7n b\u00f9 3\u20137\u00b0 t\u00f9y t, V v\u00e0 R. X\u00e1c nh\u1eadn b\u1eb1ng m\u1eabu th\u1eed \u0111\u1ea7u ca\/l\u00f4.<br \/>\n  &#8211; N\u1ebfu c\u1ea7n dung sai g\u00f3c ch\u1eb7t, d\u00f9ng bottoming nh\u1eb9 \u0111\u1ec3 gi\u1ea3m springback (lu\u00f4n ki\u1ec3m tra l\u1ef1c ch\u1ea5n t\u1ed1i \u0111a).<br \/>\n&#8211; \u1ed4n \u0111\u1ecbnh qu\u00e1 tr\u00ecnh:<br \/>\n  &#8211; Gi\u1eef c\u1ed1 \u0111\u1ecbnh V-die, rP, t\u1ed1c \u0111\u1ed9 v\u00e0 dwell; th\u00e1o\/l\u1ed9t film b\u1ea3o v\u1ec7 nh\u1ea5t qu\u00e1n (film l\u00e0m thay \u0111\u1ed5i ma s\u00e1t v\u00e0 g\u00f3c \u01b0\u1edbc 0.5\u20131\u00b0).<br \/>\n  &#8211; \u00c1p d\u1ee5ng crowning; ki\u1ec3m so\u00e1t \u0111\u1ed9 song song ph\u00f4i\u2013khu\u00f4n; \u0111o g\u00f3c b\u1eb1ng th\u01b0\u1edbc \u0111i\u1ec7n t\u1eed\/feelers; n\u1ebfu c\u00f3, d\u00f9ng c\u1ea3m bi\u1ebfn \u0111o g\u00f3c online.<br \/>\n&#8211; T\u00ednh to\u00e1n tri\u1ec3n khai (flat pattern):<br \/>\n  &#8211; D\u00f9ng K-factor cho Inox trong air bending kho\u1ea3ng 0.38\u20130.50 (\u0111i\u1ec3n h\u00ecnh 0.45), \u0111i\u1ec1u ch\u1ec9nh theo V v\u00e0 R th\u1ef1c t\u1ebf.<br \/>\n  &#8211; Ki\u1ec3m ch\u1ee9ng bend allowance\/bend deduction b\u1eb1ng chi ti\u1ebft m\u1eabu v\u00e0 c\u1eadp nh\u1eadt b\u1ea3ng tra cho t\u1eebng t\u1ed5 h\u1ee3p v\u1eadt li\u1ec7u\u2013khu\u00f4n\u2013m\u00e1y t\u1ea1i x\u01b0\u1edfng.<\/p>\n<h2 id=\"toc-2-thong-so-khuyen-nghi-thuc-hanh\"><span class=\"ez-toc-section\" id=\"Thong_so_khuyen_nghi_thuc_hanh\"><\/span>Th\u00f4ng s\u1ed1 khuy\u1ebfn ngh\u1ecb th\u1ef1c h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Ch\u1ecdn V-die cho Inox:<br \/>\n  &#8211; t \u2264 1.0 mm: V \u2248 6\u20138\u00d7t<br \/>\n  &#8211; 1.0 < t \u2264 3.0 mm: V \u2248 8\u00d7t\n  - t > 3.0 mm: V \u2248 10\u00d7t<br \/>\n&#8211; B\u00e1n k\u00ednh trong m\u1ee5c ti\u00eau khi air bending:<br \/>\n  &#8211; IR \u2248 0.16\u20130.20 \u00d7 V (Inox th\u01b0\u1eddng \u1edf bi\u00ean 0.18\u20130.20 \u00d7 V). V\u00ed d\u1ee5 V = 16 mm \u2192 IR \u2248 2.6\u20133.2 mm.<br \/>\n&#8211; L\u1ef1c ch\u1ea5n (air bending, x\u1ea5p x\u1ec9, theo WILA\/FMA):<br \/>\n  &#8211; T (kN\/m) \u2248 1.42 \u00d7 TS(MPa) \u00d7 t^2(mm) \/ V(mm)<br \/>\n  &#8211; V\u00ed d\u1ee5: SUS304, t = 2.0 mm, TS \u2248 600 MPa, V = 16 mm \u2192 T \u2248 1.42 \u00d7 600 \u00d7 4 \/ 16 \u2248 213 kN\/m \u2248 21.7 t\u1ea5n\/m.<br \/>\n&#8211; Springback tham kh\u1ea3o (90\u00b0, air bending, 304\/316):<br \/>\n  &#8211; t 1\u20132 mm, V = 8t: b\u00f9 3\u20136\u00b0<br \/>\n  &#8211; t 3\u20136 mm, V = 8\u201310t: b\u00f9 2\u20135\u00b0<br \/>\n  &#8211; Ghi ch\u00fa: V r\u1ed9ng h\u01a1n v\u00e0 IR l\u1edbn h\u01a1n \u2192 springback t\u0103ng; bottoming gi\u1ea3m springback.<br \/>\n&#8211; Kho\u1ea3ng c\u00e1ch \u0111\u1eb7c tr\u01b0ng khi thi\u1ebft k\u1ebf:<br \/>\n  &#8211; L\u1ed7\/c\u1eeda s\u1ed5 \u0111\u1ebfn \u0111\u01b0\u1eddng g\u1ea5p \u2265 1.5R + t (t\u1ed1i thi\u1ec3u 3t n\u1ebfu ch\u01b0a x\u00e1c minh).<br \/>\n  &#8211; R\u00e3nh relief: s\u00e2u \u2265 R + t; r\u1ed9ng \u2265 1.0\u20131.5t \u0111\u1ec3 ch\u1ed1ng r\u00e1ch.<br \/>\n  &#8211; Tr\u00e1nh b\u1ebb d\u1ecdc theo m\u1ed1i h\u00e0n; n\u1ebfu b\u1eaft bu\u1ed9c, c\u00e1ch m\u00e9p g\u1ea5p \u2265 3t v\u00e0 ki\u1ec3m tra m\u1eabu.<br \/>\n&#8211; H\u01b0\u1edbng c\u00e1n:<br \/>\n  &#8211; \u01afu ti\u00ean b\u1ebb vu\u00f4ng g\u00f3c h\u01b0\u1edbng c\u00e1n \u0111\u1ec3 \u0111\u1ea1t R nh\u1ecf v\u00e0 gi\u1ea3m n\u1ee9t; \u0111\u00e1nh d\u1ea5u h\u01b0\u1edbng c\u00e1n tr\u00ean m\u1ed7i ph\u00f4i.<\/p>\n<h2 id=\"toc-3-vi-du-tinh-nhanh-bend-allowance-va-quy-trinh-chuan\"><span class=\"ez-toc-section\" id=\"Vi_du_tinh_nhanh_bend_allowance_va_quy_trinh_chuan\"><\/span>V\u00ed d\u1ee5 t\u00ednh nhanh bend allowance v\u00e0 quy tr\u00ecnh chu\u1ea9n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; B\u00e0i to\u00e1n: 90\u00b0 air bending, SUS304 t = 2.0 mm, V = 16 mm \u2192 IR \u2248 0.18\u00d716 = 2.9 mm. Ch\u1ecdn K = 0.45.<br \/>\n&#8211; Bend allowance (BA):<br \/>\n  &#8211; BA \u2248 (\u03c0\/180) \u00d7 90\u00b0 \u00d7 (IR + K\u00d7t) = 1.5708 \u00d7 (2.9 + 0.9) \u2248 1.5708 \u00d7 3.8 \u2248 5.97 mm.<br \/>\n&#8211; Quy tr\u00ecnh:<br \/>\n  &#8211; T\u00ednh BA\/BD v\u00e0 c\u1eaft ph\u00f4i; deburr\/bo m\u00e9p.<br \/>\n  &#8211; Ch\u1ecdn V = 16 mm, ch\u00e0y rP \u2248 3 mm; t\u00ednh l\u1ef1c \u2248 21\u201322 t\u1ea5n\/m.<br \/>\n  &#8211; L\u00e0m m\u1eabu 200 mm d\u00e0i; \u0111o g\u00f3c, hi\u1ec7u ch\u1ec9nh b\u00f9 springback \u0111\u1ebfn \u0111\u1ea1t 90\u00b0.<br \/>\n  &#8211; Ghi nh\u1eadn th\u00f4ng s\u1ed1 v\u00e0o b\u1ea3ng chu\u1ea9n x\u01b0\u1edfng cho t\u1ed5 h\u1ee3p 304\u20132.0 mm\u2013V16\u2013r3.<\/p>\n<h2 id=\"toc-4-quy-trinh-kiem-soat-loi-theo-tung-buoc\"><span class=\"ez-toc-section\" id=\"Quy_trinh_kiem_soat_loi_theo_tung_buoc\"><\/span>Quy tr\u00ecnh ki\u1ec3m so\u00e1t l\u1ed7i theo t\u1eebng b\u01b0\u1edbc<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Tr\u01b0\u1edbc khi ch\u1ea5n<br \/>\n&#8211; Ki\u1ec3m ch\u1ee9ng ch\u1ee9ng ch\u1ec9 v\u1eadt li\u1ec7u (m\u00e1c, \u0111\u1ed9 d\u00e0y th\u1ef1c, b\u1ec1 m\u1eb7t).<br \/>\n&#8211; \u0110\u00e1nh d\u1ea5u h\u01b0\u1edbng c\u00e1n; quy \u0111\u1ecbnh h\u01b0\u1edbng b\u1ebb tr\u00ean b\u1ea3n v\u1ebd n\u1ebfu c\u1ea7n R nh\u1ecf.<br \/>\n&#8211; Ch\u1ecdn V-die, ch\u00e0y, t\u00ednh l\u1ef1c ch\u1ea5n; ki\u1ec3m tra gi\u1edbi h\u1ea1n m\u00e1y\/khu\u00f4n.<br \/>\n&#8211; X\u1eed l\u00fd c\u1ea1nh c\u1eaft: deburr\/bo m\u00e9p; \u01b0u ti\u00ean c\u1eaft N2 cho laser; n\u1eafn ph\u1eb3ng ph\u00f4i.<br \/>\n&#8211; Chu\u1ea9n b\u1ecb b\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t: film, b\u0103ng keo PTFE, d\u1ea7u b\u00f4i tr\u01a1n ph\u00f9 h\u1ee3p.<\/p>\n<p>Trong khi ch\u1ea5n<br \/>\n&#8211; L\u00e0m m\u1eabu \u0111\u1ea7u ca\/l\u00f4; \u0111o g\u00f3c \u1edf 3 v\u1ecb tr\u00ed (\u0111\u1ea7u\u2013gi\u1eefa\u2013\u0111\u1ea7u); \u0111i\u1ec1u ch\u1ec9nh crowning\/b\u00f9 g\u00f3c.<br \/>\n&#8211; Gi\u1eef t\u1ed1c \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh; th\u00eam dwell ng\u1eafn \u1edf \u0111\u00e1y h\u00e0nh tr\u00ecnh \u0111\u1ec3 gi\u1ea3m r\u1ea3i g\u00f3c.<br \/>\n&#8211; Ki\u1ec3m so\u00e1t \u0111\u1ee1 b\u00edch v\u00e0 th\u1ee9 t\u1ef1 g\u1ea5p \u0111\u1ec3 h\u1ea1n ch\u1ebf v\u00eanh, xo\u1eafn.<\/p>\n<p>Sau khi ch\u1ea5n<br \/>\n&#8211; Ki\u1ec3m tra n\u1ee9t (quan s\u00e1t, PT khi c\u1ea7n), \u0111o b\u00e1n k\u00ednh trong th\u1ef1c.<br \/>\n&#8211; V\u1ec7 sinh d\u1ea7u\/b\u1ee5i; b\u1ea3o to\u00e0n l\u1edbp ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t.<br \/>\n&#8211; C\u1eadp nh\u1eadt th\u00f4ng s\u1ed1 v\u00e0o th\u01b0 vi\u1ec7n c\u00f4ng ngh\u1ec7 c\u1ee7a x\u01b0\u1edfng.<\/p>\n<h2 id=\"toc-5-cau-hoi-thuong-gap\"><span class=\"ez-toc-section\" id=\"Cau_hoi_thuong_gap\"><\/span>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; C\u00f3 n\u00ean coining \u0111\u1ec3 gi\u1eef dung sai g\u00f3c ch\u1eb7t? Coining ho\u1eb7c bottoming gi\u1ea3m springback nh\u01b0ng t\u0103ng l\u1ef1c ch\u1ea5n v\u00e0 nguy c\u01a1 n\u1ee9t\/x\u01b0\u1edbc. Ch\u1ec9 d\u00f9ng khi th\u1ef1c s\u1ef1 c\u1ea7n v\u00e0 khu\u00f4n\u2013m\u00e1y cho ph\u00e9p, \u01b0u ti\u00ean bottoming nh\u1eb9 v\u1edbi rP ph\u00f9 h\u1ee3p.<br \/>\n&#8211; B\u1ebb g\u1ea7n \u0111\u01b0\u1eddng h\u00e0n \u0111\u01b0\u1ee3c kh\u00f4ng? Kh\u00f4ng khuy\u1ebfn ngh\u1ecb. N\u1ebfu b\u1eaft bu\u1ed9c, \u0111\u1ea3m b\u1ea3o kho\u1ea3ng c\u00e1ch \u2265 3t, m\u00e0i ph\u1eb3ng, th\u1eed nghi\u1ec7m v\u00e0 ki\u1ec3m tra n\u1ee9t.<br \/>\n&#8211; B\u00f4i tr\u01a1n lo\u1ea1i n\u00e0o an to\u00e0n cho Inox? D\u00f9ng d\u1ea7u t\u1ed5ng h\u1ee3p\/esters kh\u00f4ng ch\u1ee9a chloride \u0111\u1ec3 tr\u00e1nh \u0103n m\u00f2n \u1ee9ng su\u1ea5t; v\u1ec7 sinh sau gia c\u00f4ng.<br \/>\n&#8211; G\u1ea5p Inox c\u00f3 film b\u1ea3o v\u1ec7 kh\u00e1c g\u00ec? Ma s\u00e1t t\u0103ng, g\u00f3c c\u00f3 th\u1ec3 \u201c\u0111\u1ed9i\u201d 0.5\u20131\u00b0. Gi\u1eef nh\u1ea5t qu\u00e1n tr\u1ea1ng th\u00e1i film gi\u1eefa m\u1eabu v\u00e0 s\u1ea3n xu\u1ea5t lo\u1ea1t.<\/p>\n<h2 id=\"toc-6-nguon-tham-khao\"><span class=\"ez-toc-section\" id=\"Nguon_tham_khao\"><\/span>Ngu\u1ed3n tham kh\u1ea3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; The Fabricator (Steve Benson) \u2013 Air bending rules, V-die selection, springback: https:\/\/www.thefabricator.com<br \/>\n&#8211; WILA \u2013 Bending force calculation and tooling guidelines: https:\/\/www.wilausa.com\/knowledge-base\/bending-force-calculation<br \/>\n&#8211; Outokumpu \u2013 Stainless steel fabrication handbook (bending, minimum radii): https:\/\/www.outokumpu.com<br \/>\n&#8211; Atlas Steels \u2013 Technical Handbook of Stainless Steels: https:\/\/www.atlassteels.com.au<br \/>\n&#8211; ASM Specialty Handbook: Stainless Steels \u2013 Bending\/formability overview (ASM International)<\/p>\n<h2 id=\"toc-7-ket-luan\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; N\u1ee9t x\u1ea3y ra khi b\u00e1n k\u00ednh trong qu\u00e1 nh\u1ecf, m\u00e9p c\u1eaft x\u1ea5u ho\u1eb7c b\u1ebb theo th\u1edb; kh\u1eafc ph\u1ee5c b\u1eb1ng t\u0103ng R, ch\u1ecdn V-die ph\u00f9 h\u1ee3p, x\u1eed l\u00fd m\u00e9p v\u00e0 \u0111\u1ecbnh h\u01b0\u1edbng th\u1edb h\u1ee3p l\u00fd.<br \/>\n&#8211; Bi\u1ebfn d\u1ea1ng cong\/v\u00eanh\/xo\u1eafn ch\u1ee7 y\u1ebfu do v\u00f5ng m\u00e1y, thi\u1ebfu crowning v\u00e0 \u0111\u1ee1 b\u00edch; gi\u1ea3i quy\u1ebft b\u1eb1ng hi\u1ec7u ch\u1ec9nh m\u00e1y, tr\u00ecnh t\u1ef1 g\u1ea5p v\u00e0 b\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t.<br \/>\n&#8211; Sai g\u00f3c v\u00e0 r\u1ea3i g\u00f3c xu\u1ea5t ph\u00e1t t\u1eeb springback l\u1edbn c\u1ee7a Inox v\u00e0 sai s\u1ed1 l\u1ef1c; c\u1ea7n b\u00f9 g\u00f3c c\u00f3 ki\u1ec3m so\u00e1t, t\u00ednh BA\/BD v\u1edbi K-factor ph\u00f9 h\u1ee3p v\u00e0 \u0111o ki\u1ec3m t\u1ea1i ch\u1ed7.<br \/>\n\u00c1p d\u1ee5ng c\u00e1c th\u00f4ng s\u1ed1 v\u00e0 quy tr\u00ecnh ki\u1ec3m so\u00e1t tr\u00ean s\u1ebd gi\u00fap x\u01b0\u1edfng c\u1ee7a b\u1ea1n ch\u1ea5n Inox \u1ed5n \u0111\u1ecbnh, h\u1ea1n ch\u1ebf ph\u1ebf ph\u1ea9m v\u00e0 n\u00e2ng cao n\u0103ng su\u1ea5t.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n th\u00eam v\u1ec1 ch\u1ecdn m\u00e1c Inox, chi\u1ec1u d\u00e0y v\u00e0 b\u1ed9 khu\u00f4n ch\u1ea5n t\u1ed1i \u01b0u cho s\u1ea3n ph\u1ea9m c\u1ee7a b\u1ea1n? Li\u00ean h\u1ec7 Inox C\u01b0\u1eddng Th\u1ecbnh \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt v\u00e0 b\u00e1o gi\u00e1 t\u1ed1t nh\u1ea5t. Hotline: 0343.417.281. Email: inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ph\u00e2n t\u00edch nguy\u00ean nh\u00e2n n\u1ee9t, bi\u1ebfn d\u1ea1ng, sai g\u00f3c khi ch\u1ea5n Inox v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c: ch\u1ecdn V-die, b\u00e1n k\u00ednh, b\u00f9 springback, h\u01b0\u1edbng c\u00e1n, t\u00ednh l\u1ef1c ch\u1ea5n an to\u00e0n.<\/p>\n","protected":false},"author":7,"featured_media":1018,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2287","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"acf":[],"_links":{"self":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2287","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/comments?post=2287"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2287\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1018"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=2287"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=2287"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=2287"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}