{"id":1830,"date":"2026-03-27T00:34:40","date_gmt":"2026-03-26T17:34:40","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/chan-inox-bi-nut-bien-dang-sai-goc-nguyen-nhan-khac-phuc-2\/"},"modified":"2026-03-27T00:34:40","modified_gmt":"2026-03-26T17:34:40","slug":"chan-inox-bi-nut-bien-dang-sai-goc-nguyen-nhan-khac-phuc-2","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/chan-inox-bi-nut-bien-dang-sai-goc-nguyen-nhan-khac-phuc-2\/","title":{"rendered":"Ch\u1ea5n Inox b\u1ecb n\u1ee9t, bi\u1ebfn d\u1ea1ng, sai g\u00f3c: nguy\u00ean nh\u00e2n &#038; kh\u1eafc ph\u1ee5c"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-nhan-dien-nhanh-loi-va-cach-xu-ly-tuc-thoi\">Nh\u1eadn di\u1ec7n nhanh l\u1ed7i v\u00e0 c\u00e1ch x\u1eed l\u00fd t\u1ee9c th\u1eddi<\/a><\/li>\n<li><a href=\"#toc-1-co-so-ky-thuat-can-nam-khi-chan-inox\">C\u01a1 s\u1edf k\u1ef9 thu\u1eadt c\u1ea7n n\u1eafm khi ch\u1ea5n Inox<\/a><\/li>\n<li><a href=\"#toc-2-loi-nut-mep-ran-chan-gap\">L\u1ed7i n\u1ee9t m\u00e9p, r\u1ea1n ch\u00e2n g\u1ea5p<\/a><\/li>\n<li><a href=\"#toc-3-loi-bien-dang-xoan-venh-nhan-han-vet\">L\u1ed7i bi\u1ebfn d\u1ea1ng: xo\u1eafn, v\u00eanh, nh\u0103n, h\u1eb1n v\u1ebft<\/a><\/li>\n<li><a href=\"#toc-4-loi-sai-goc-sai-kich-thuoc-do-dan-hoi-tinh-toan-tr\">L\u1ed7i sai g\u00f3c, sai k\u00edch th\u01b0\u1edbc (do \u0111\u00e0n h\u1ed3i, t\u00ednh to\u00e1n tri\u1ec3n khai)<\/a><\/li>\n<li><a href=\"#toc-5-vi-du-tinh-nhanh-cai-dat-cho-304-day-20-mm\">V\u00ed d\u1ee5 t\u00ednh nhanh c\u00e0i \u0111\u1eb7t cho 304 d\u00e0y 2,0 mm<\/a><\/li>\n<li><a href=\"#toc-6-checklist-truoc-khi-chay-lo-hang\">Checklist tr\u01b0\u1edbc khi ch\u1ea1y l\u00f4 h\u00e0ng<\/a><\/li>\n<li><a href=\"#toc-7-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-8-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Ch\u1ea5n (bending) l\u00e0 kh\u00e2u then ch\u1ed1t trong gia c\u00f4ng Inox, nh\u01b0ng r\u1ea5t d\u1ec5 ph\u00e1t sinh c\u00e1c l\u1ed7i n\u1ee9t m\u00e9p, bi\u1ebfn d\u1ea1ng (xo\u1eafn, v\u00eanh, h\u1eb1n v\u1ebft) v\u00e0 sai g\u00f3c do \u0111\u1eb7c t\u00ednh h\u00f3a b\u1ec1n bi\u1ebfn d\u1ea1ng, \u0111\u00e0n h\u1ed3i tr\u1edf l\u1ea1i l\u1edbn. B\u00e0i vi\u1ebft n\u00e0y \u0111i th\u1eb3ng v\u00e0o nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 v\u00e0 h\u01b0\u1edbng x\u1eed l\u00fd th\u1ef1c chi\u1ebfn cho t\u1eebng l\u1ed7i, k\u00e8m khuy\u1ebfn ngh\u1ecb d\u1ee5ng c\u1ee5, c\u00e0i \u0111\u1eb7t, c\u00f4ng th\u1ee9c v\u00e0 v\u00ed d\u1ee5 t\u00ednh nhanh. Ch\u1ee7 \u0111\u1ec1 n\u00e0y n\u1eb1m trong b\u1ee9c tranh chung c\u00e1c ph\u01b0\u01a1ng ph\u00e1p gia c\u00f4ng Inox (c\u1eaft, ch\u1ea5n, d\u1eadp, l\u1ed1c), nh\u01b0ng n\u1ed9i dung d\u01b0\u1edbi \u0111\u00e2y ho\u00e0n to\u00e0n \u0111\u1ed9c l\u1eadp \u0111\u1ec3 b\u1ea1n \u00e1p d\u1ee5ng ngay t\u1ea1i x\u01b0\u1edfng.<\/p>\n<h2 id=\"toc-0-nhan-dien-nhanh-loi-va-cach-xu-ly-tuc-thoi\">Nh\u1eadn di\u1ec7n nhanh l\u1ed7i v\u00e0 c\u00e1ch x\u1eed l\u00fd t\u1ee9c th\u1eddi<\/h2>\n<p>&#8211; N\u1ee9t m\u00e9p\/vi n\u1ee9t \u1edf bi\u00ean ngo\u00e0i: t\u0103ng b\u00e1n k\u00ednh trong (R) b\u1eb1ng ch\u00e0y l\u1edbn h\u01a1n; d\u00f9ng c\u1ed1i mi\u1ec7ng V l\u1edbn h\u01a1n (8\u201310\u00d7t); xoay ph\u00f4i \u0111\u1ec3 \u0111\u01b0\u1eddng ch\u1ea5n vu\u00f4ng g\u00f3c v\u1edbi th\u1edb c\u00e1n; m\u00e0i ph\u00e1 ba via; t\u0103ng kho\u1ea3ng c\u00e1ch l\u1ed7 m\u00e9p \u0111\u1ebfn \u0111\u01b0\u1eddng ch\u1ea5n; gi\u1ea3m g\u00f3c ch\u1ea5n b\u1eb1ng ch\u1ea5n 2 b\u01b0\u1edbc.<br \/>\n&#8211; Bi\u1ebfn d\u1ea1ng (xo\u1eafn c\u00e1nh, v\u00eanh, nh\u0103n, h\u1eb1n v\u1ebft): th\u00eam g\u1ed1i \u0111\u1ee1 t\u1ea5m d\u00e0i; t\u1ed1i \u01b0u tr\u00ecnh t\u1ef1 ch\u1ea5n \u0111\u1ed1i x\u1ee9ng; \u0111i\u1ec1u ch\u1ec9nh crowning; d\u00f9ng phim PU\/nh\u1ef1a che khu\u00f4n; ch\u1ecdn V l\u1edbn h\u01a1n \u0111\u1ec3 gi\u1ea3m v\u1ebft h\u1eb1n; b\u1ed5 sung r\u00e3nh relief t\u1ea1i g\u00f3c.<br \/>\n&#8211; Sai g\u00f3c\/sai k\u00edch th\u01b0\u1edbc do \u0111\u00e0n h\u1ed3i: b\u00f9 \u0111\u00e0n h\u1ed3i (overbend th\u00eam 2\u20136\u00b0); chuy\u1ec3n t\u1eeb air bending sang bottoming khi c\u1ea7n \u1ed5n \u0111\u1ecbnh g\u00f3c; hi\u1ec7u ch\u1ec9nh K-factor\/BA trong tri\u1ec3n khai; ki\u1ec3m chu\u1ea9n m\u00e1y v\u00e0 h\u1ed3i quy ch\u01b0\u01a1ng tr\u00ecnh theo m\u1eabu th\u1eed.<\/p>\n<h2 id=\"toc-1-co-so-ky-thuat-can-nam-khi-chan-inox\">C\u01a1 s\u1edf k\u1ef9 thu\u1eadt c\u1ea7n n\u1eafm khi ch\u1ea5n Inox<\/h2>\n<h3>T\u00ednh ch\u1ea5t v\u1eadt li\u1ec7u v\u00e0 h\u01b0\u1edbng th\u1edb<\/h3>\n<p>&#8211; Inox Austenitic (304\/316): \u0111\u1ed9 gi\u00e3n d\u00e0i cao, h\u00f3a b\u1ec1n nhanh \u2192 \u0111\u00e0n h\u1ed3i tr\u1edf l\u1ea1i l\u1edbn h\u01a1n th\u00e9p carbon; b\u00f9 g\u00f3c l\u1edbn h\u01a1n.<br \/>\n&#8211; Inox Ferritic (430): \u0111\u1ed9 dai th\u1ea5p h\u01a1n \u2192 nh\u1ea1y n\u1ee9t m\u00e9p h\u01a1n khi R qu\u00e1 nh\u1ecf.<br \/>\n&#8211; Inox Martensitic\/Duplex: c\u1ee9ng, gi\u00f2n t\u01b0\u01a1ng \u0111\u1ed1i \u2192 y\u00eau c\u1ea7u R l\u1edbn, ki\u1ec3m so\u00e1t t\u1ea3i ch\u1ea5n ch\u1eb7t ch\u1ebd.<br \/>\n&#8211; H\u01b0\u1edbng th\u1edb c\u00e1n: b\u1ebb vu\u00f4ng g\u00f3c v\u1edbi th\u1edb (bend across grain) an to\u00e0n h\u01a1n; b\u1ebb d\u1ecdc theo th\u1edb d\u1ec5 n\u1ee9t m\u00e9p.<\/p>\n<h3>B\u00e1n k\u00ednh trong t\u1ed1i thi\u1ec3u v\u00e0 l\u1ef1a ch\u1ecdn ch\u1ea7y\/c\u1ed1i<\/h3>\n<p>Khuy\u1ebfn ngh\u1ecb R trong t\u1ed1i thi\u1ec3u (\u0111i\u1ec3n h\u00ecnh, t l\u00e0 chi\u1ec1u d\u00e0y):<br \/>\n&#8211; 304\/316 (\u1ee7): Rmin \u2248 1,0\u20131,5\u00d7t<br \/>\n&#8211; 201\/301 (\u0111\u1ed9 b\u1ec1n cao): Rmin \u2248 1,5\u20132,0\u00d7t<br \/>\n&#8211; 430 (ferritic): Rmin \u2248 1,0\u20131,5\u00d7t<br \/>\n&#8211; Duplex\/Martensitic: Rmin \u2265 2,0\u20133,0\u00d7t<br \/>\nNgu\u1ed3n tham kh\u1ea3o: Outokumpu Stainless Steel Handbook; SSINA Design Guidelines.<\/p>\n<h3>Ch\u1ecdn mi\u1ec7ng c\u1ed1i (V) v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn l\u1ef1c, b\u00e1n k\u00ednh<\/h3>\n<p>&#8211; Quy t\u1eafc th\u1ef1c h\u00e0nh cho Inox: V \u2248 6\u201310\u00d7t (m\u1ecfng\/nh\u1eb9 d\u00f9ng 6\u20138\u00d7t; d\u00e0y\/c\u1ee9ng d\u00f9ng 8\u201310\u00d7t).<br \/>\n&#8211; Air bending: b\u00e1n k\u00ednh trong h\u00ecnh th\u00e0nh x\u1ea5p x\u1ec9 r \u2248 0,16\u20130,2 \u00d7 V. V qu\u00e1 h\u1eb9p \u2192 r nh\u1ecf, \u1ee9ng su\u1ea5t k\u00e9o bi\u00ean t\u0103ng \u2192 d\u1ec5 n\u1ee9t v\u00e0 v\u1ebft h\u1eb1n.<br \/>\n&#8211; L\u1ef1c ch\u1ea5n (\u01b0\u1edbc t\u00ednh, metric): F (kN\/m) \u2248 1,42 \u00d7 \u03c3UTS(MPa) \u00d7 t\u00b2 \/ V(mm). V\u1edbi Inox, ch\u1ecdn V \u0111\u1ee7 l\u1edbn \u0111\u1ec3 gi\u1ea3m l\u1ef1c v\u00e0 m\u00e0i m\u00f2n khu\u00f4n.<br \/>\nTham kh\u1ea3o: The Fabricator (Steve Benson), h\u01b0\u1edbng d\u1eabn t\u00ednh l\u1ef1c ch\u1ea5n.<\/p>\n<h3>\u0110\u00e0n h\u1ed3i tr\u1edf l\u1ea1i (springback) v\u00e0 c\u00e1ch b\u00f9<\/h3>\n<p>&#8211; Inox austenitic c\u00f3 springback th\u01b0\u1eddng 2\u20134\u00b0, c\u00f3 th\u1ec3 t\u1edbi 6\u20138\u00b0 v\u1edbi v\u1eadt li\u1ec7u c\u1ee9ng, R l\u1edbn\/V l\u1edbn.<br \/>\n&#8211; C\u00e1ch b\u00f9: overbend theo gi\u00e1 tr\u1ecb \u0111o th\u1ef1c t\u1ebf; d\u00f9ng bottoming\/coin (h\u1ea1n ch\u1ebf v\u1edbi Inox d\u00e0y do t\u0103ng \u1ee9ng su\u1ea5t v\u00e0 r\u1ee7i ro n\u1ee9t); d\u00f9ng ch\u00e0y R l\u1edbn h\u01a1n k\u1ebft h\u1ee3p V ph\u00f9 h\u1ee3p \u0111\u1ec3 \u1ed5n \u0111\u1ecbnh.<\/p>\n<h3>Chi\u1ec1u d\u00e0i tri\u1ec3n khai, K-factor<\/h3>\n<p>&#8211; Ch\u1ecdn K-factor cho Inox: 0,38\u20130,45 (cao h\u01a1n th\u00e9p CT th\u01b0\u1eddng ~0,33). Sai K-factor \u2192 sai k\u00edch th\u01b0\u1edbc sau ch\u1ea5n.<br \/>\n&#8211; C\u1eadp nh\u1eadt K-factor\/BA b\u1eb1ng coupon test khi \u0111\u1ed5i m\u00e1c\/t, V\/khu\u00f4n.<\/p>\n<h2 id=\"toc-2-loi-nut-mep-ran-chan-gap\">L\u1ed7i n\u1ee9t m\u00e9p, r\u1ea1n ch\u00e2n g\u1ea5p<\/h2>\n<h3>D\u1ea5u hi\u1ec7u<\/h3>\n<p>&#8211; V\u1ebft n\u1ee9t\/vi n\u1ee9t \u1edf m\u00e9p ngo\u00e0i \u0111\u01b0\u1eddng ch\u1ea5n; n\u1ee9t ch\u00e2n g\u1ea5p t\u1ea1i g\u00f3c; n\u1ee9t lan t\u1eeb l\u1ed7\/\u00f4 c\u1eeda s\u1ed5 g\u1ea7n \u0111\u01b0\u1eddng ch\u1ea5n.<\/p>\n<h3>Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn<\/h3>\n<p>&#8211; R trong qu\u00e1 nh\u1ecf so v\u1edbi t v\u00e0 c\u1ea5p b\u1ec1n; ch\u1ecdn V qu\u00e1 h\u1eb9p.<br \/>\n&#8211; B\u1ebb d\u1ecdc theo th\u1edb c\u00e1n; m\u00e9p c\u1eaft c\u00f3 ba via, v\u1ebft x\u01b0\u1edbc s\u00e2u h\u01b0\u1edbng d\u1ecdc theo bi\u00ean k\u00e9o.<br \/>\n&#8211; M\u00e9p l\u1ed7\/\u00f4 n\u1eb1m qu\u00e1 g\u1ea7n \u0111\u01b0\u1eddng ch\u1ea5n; m\u00e9p c\u1eaft ngu\u1ed9i b\u1ecb h\u00f3a b\u1ec1n (shear\/punch) kh\u00f4ng \u0111\u01b0\u1ee3c x\u1eed l\u00fd.<br \/>\n&#8211; D\u00f9ng coining m\u1ea1nh tr\u00ean Inox c\u1ee9ng\/d\u00e0y; l\u1ef1c ch\u1ea5n v\u01b0\u1ee3t khuy\u1ebfn ngh\u1ecb.<\/p>\n<h3>Gi\u1ea3i ph\u00e1p chi ti\u1ebft<\/h3>\n<p>&#8211; T\u0103ng R trong: thay ch\u00e0y m\u0169i R l\u1edbn h\u01a1n; t\u0103ng V (v\u00ed d\u1ee5 t\u1eeb 6\u00d7t l\u00ean 8\u201310\u00d7t) \u0111\u1ec3 r \u2248 0,16V l\u1edbn h\u01a1n.<br \/>\n&#8211; Xoay ph\u00f4i: \u0111\u1eb7t \u0111\u01b0\u1eddng ch\u1ea5n vu\u00f4ng g\u00f3c v\u1edbi th\u1edb; \u01b0u ti\u00ean b\u1ebb across grain.<br \/>\n&#8211; X\u1eed l\u00fd m\u00e9p: m\u00e0i ph\u00e1 ba via, v\u00ea m\u00e9p R\u22480,2\u20130,5 mm; \u0111\u00e1nh s\u1ea1ch v\u1ebft c\u1eaft s\u1ed1c; v\u1edbi m\u00e9p d\u1eadp\/l\u1ed7, th\u1ef1c hi\u1ec7n doa\/m\u00e0i ph\u00e1 ba via.<br \/>\n&#8211; Kho\u1ea3ng c\u00e1ch l\u1ed7 \u0111\u1ebfn \u0111\u01b0\u1eddng ch\u1ea5n: t\u1ed1i thi\u1ec3u \u2265 2,5\u20133,0\u00d7t ho\u1eb7c \u2265 R + 2\u00d7t (l\u1ea5y gi\u00e1 tr\u1ecb l\u1edbn h\u01a1n). D\u00f9ng r\u00e3nh relief \u1edf g\u00f3c c\u00e1nh.<br \/>\n&#8211; Quy tr\u00ecnh: air bending 2 b\u01b0\u1edbc (pre-bend g\u00f3c l\u1edbn v\u1edbi R l\u1edbn, sau \u0111\u00f3 hi\u1ec7u ch\u1ec9nh g\u00f3c); tr\u00e1nh coining qu\u00e1 m\u1ee9c v\u1edbi Inox d\u00e0y.<br \/>\n&#8211; V\u1eadt li\u1ec7u: n\u1ebfu th\u01b0\u1eddng xuy\u00ean n\u1ee9t v\u1edbi 201\/301 c\u1ee9ng, c\u00e2n nh\u1eafc \u0111\u1ed5i sang 304\/304L condition 2B\/annealed cho chi ti\u1ebft y\u00eau c\u1ea7u R nh\u1ecf.<br \/>\nNgu\u1ed3n: SSINA; Outokumpu; The Fabricator.<\/p>\n<h2 id=\"toc-3-loi-bien-dang-xoan-venh-nhan-han-vet\">L\u1ed7i bi\u1ebfn d\u1ea1ng: xo\u1eafn, v\u00eanh, nh\u0103n, h\u1eb1n v\u1ebft<\/h2>\n<h3>Nguy\u00ean nh\u00e2n<\/h3>\n<p>&#8211; T\u1ea5m d\u00e0i, c\u00e1nh h\u1eb9p; tr\u00ecnh t\u1ef1 ch\u1ea5n kh\u00f4ng \u0111\u1ed1i x\u1ee9ng; thi\u1ebfu g\u1ed1i \u0111\u1ee1 \u2192 xo\u1eafn\/v\u00eanh.<br \/>\n&#8211; \u0110\u1ed9 v\u00f5ng m\u00e1y v\u00e0 khu\u00f4n kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u (crown) \u2192 \u201cb\u1ee5ng thuy\u1ec1n\u201d d\u1ecdc theo \u0111\u01b0\u1eddng ch\u1ea5n.<br \/>\n&#8211; V qu\u00e1 h\u1eb9p, b\u1ec1 m\u1eb7t khu\u00f4n th\u00f4 \u2192 h\u1eb1n v\u1ebft, x\u01b0\u1edbc; l\u1ef1c ch\u1ea5n cao g\u00e2y l\u00f5m c\u00e1nh.<br \/>\n&#8211; G\u1ea7n g\u00f3c, v\u1eadt li\u1ec7u \u201cd\u00f4i\u201d kh\u00f4ng tho\u00e1t k\u1ecbp \u2192 nh\u0103n.<\/p>\n<h3>Kh\u1eafc ph\u1ee5c<\/h3>\n<p>&#8211; Tr\u00ecnh t\u1ef1 ch\u1ea5n: \u0111i t\u1eeb chi ti\u1ebft nh\u1ecf \u0111\u1ebfn l\u1edbn; xen k\u1ebd tr\u00e1i\u2013ph\u1ea3i \u0111\u1ec3 c\u00e2n l\u1ef1c; ch\u1ea5n trung t\u00e2m tr\u01b0\u1edbc, ngo\u1ea1i vi sau; d\u00f9ng \u201cstage bending\u201d khi c\u00f3 th\u1ec3.<br \/>\n&#8211; G\u1ed1i \u0111\u1ee1 v\u00e0 g\u00e1 \u0111\u1eb7t: th\u00eam con l\u0103n\/nh\u00e2n c\u00f4ng \u0111\u1ee1 t\u1ea5m d\u00e0i; ch\u1ec9nh backgauge theo tr\u1ecdng t\u00e2m; d\u00f9ng c\u1eef k\u00e9p \u0111\u1ec3 ch\u1ed1ng xo\u1eafn.<br \/>\n&#8211; C\u1ea3i thi\u1ec7n b\u1ec1 m\u1eb7t: l\u00f3t phim PU\/nh\u1ef1a ho\u1eb7c d\u00f9ng c\u1ed1i urethane; \u0111\u00e1nh b\u00f3ng ch\u00e0y\/c\u1ed1i; t\u0103ng V m\u1ed9t c\u1ea5p \u0111\u1ec3 gi\u1ea3m v\u1ebft h\u1eb1n.<br \/>\n&#8211; C\u00e2n b\u1eb1ng m\u00e1y: \u0111i\u1ec1u ch\u1ec9nh crowning c\u01a1\/thu\u1ef7 l\u1ef1c ho\u1eb7c ch\u00eam shim; ki\u1ec3m chu\u1ea9n th\u1eb3ng h\u00e0ng ch\u00e0y\u2013c\u1ed1i \u0111\u1ecbnh k\u1ef3.<br \/>\n&#8211; Ch\u1ed1ng nh\u0103n g\u00f3c: t\u1ea1o r\u00e3nh relief, bo g\u00f3c c\u00e1nh; n\u1ebfu c\u00e1nh qu\u00e1 ng\u1eafn, \u0111\u1ea3m b\u1ea3o chi\u1ec1u d\u00e0i c\u00e1nh t\u1ed1i thi\u1ec3u khi air bending: \u2265 V\/2 + R (ho\u1eb7c x\u1ea5p x\u1ec9 \u2265 0,7\u00d7V).<br \/>\nNgu\u1ed3n: The Fabricator (air bending, crowning).<\/p>\n<h2 id=\"toc-4-loi-sai-goc-sai-kich-thuoc-do-dan-hoi-tinh-toan-tr\">L\u1ed7i sai g\u00f3c, sai k\u00edch th\u01b0\u1edbc (do \u0111\u00e0n h\u1ed3i, t\u00ednh to\u00e1n tri\u1ec3n khai)<\/h2>\n<h3>Nguy\u00ean nh\u00e2n<\/h3>\n<p>&#8211; \u0110\u00e0n h\u1ed3i tr\u1edf l\u1ea1i l\u1edbn; ch\u1ecdn V, R kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<br \/>\n&#8211; K-factor\/BA kh\u00f4ng ph\u00f9 h\u1ee3p t\u1eebng m\u00e1c\/t; chi\u1ec1u d\u00e0y th\u1ef1c t\u1ebf l\u1ec7ch chu\u1ea9n.<br \/>\n&#8211; Sai s\u1ed1 m\u00e1y: backgauge l\u1ec7ch, c\u1ea3m bi\u1ebfn g\u00f3c ch\u01b0a hi\u1ec7u ch\u1ec9nh; v\u00f5ng d\u1ea7m ch\u01b0a b\u00f9.<\/p>\n<h3>Kh\u1eafc ph\u1ee5c v\u00e0 ki\u1ec3m so\u00e1t quy tr\u00ecnh<\/h3>\n<p>&#8211; B\u00f9 \u0111\u00e0n h\u1ed3i: x\u00e1c l\u1eadp overbend theo m\u00e1c\/t\/V. V\u1edbi 304 t=2 mm, overbend \u0111i\u1ec3n h\u00ecnh +2\u20133\u00b0; v\u1edbi 201\/301 c\u00f3 th\u1ec3 +3\u20135\u00b0.<br \/>\n&#8211; \u1ed4n \u0111\u1ecbnh g\u00f3c: chuy\u1ec3n sang bottoming nh\u1eb9 v\u1edbi V ph\u00f9 h\u1ee3p khi c\u1ea7n sai s\u1ed1 \u00b10,5\u00b0; tr\u00e1nh coining m\u1ea1nh tr\u00ean Inox d\u00e0y.<br \/>\n&#8211; Tri\u1ec3n khai: d\u00f9ng K-factor 0,40\u20130,44 cho 304\/316 2B; \u0111o m\u1eabu v\u00e0 c\u1eadp nh\u1eadt b\u1ea3ng v\u1eadt li\u1ec7u n\u1ed9i b\u1ed9. Ki\u1ec3m so\u00e1t t th\u1ef1c t\u1ebf b\u1eb1ng th\u01b0\u1edbc panme \u1edf 5 \u0111i\u1ec3m\/phi\u1ebfn.<br \/>\n&#8211; M\u00e1y &#038; d\u1ee5ng c\u1ee5: c\u00e2n ch\u1ec9nh backgauge, crowning; d\u00f9ng c\u1ea3m bi\u1ebfn g\u00f3c in-process n\u1ebfu c\u00f3; ti\u00eau chu\u1ea9n h\u00f3a b\u1ed9 ch\u00e0y\/c\u1ed1i cho t\u1eebng d\u1ea3i t.<\/p>\n<h2 id=\"toc-5-vi-du-tinh-nhanh-cai-dat-cho-304-day-20-mm\">V\u00ed d\u1ee5 t\u00ednh nhanh c\u00e0i \u0111\u1eb7t cho 304 d\u00e0y 2,0 mm<\/h2>\n<p>&#8211; Y\u00eau c\u1ea7u: Air bending g\u00f3c 90\u00b0, chi\u1ec1u d\u00e0i ch\u1ea5n 1000 mm, Inox 304 2B.<br \/>\n&#8211; Ch\u1ecdn c\u1ed1i: V = 8\u00d7t = 16 mm.<br \/>\n&#8211; B\u00e1n k\u00ednh trong \u01b0\u1edbc t\u00ednh: r \u2248 0,16\u00d7V \u2248 2,56 mm.<br \/>\n&#8211; B\u00f9 \u0111\u00e0n h\u1ed3i: th\u1eed nhanh k\u1ef3 v\u1ecdng 2\u20133\u00b0, \u0111\u1eb7t g\u00f3c ch\u1ea5n kho\u1ea3ng 92,5\u00b0 \u0111\u1ec3 \u0111\u01b0\u1ee3c 90\u00b0 sau nh\u1ea3.<br \/>\n&#8211; L\u1ef1c ch\u1ea5n: \u03c3UTS(304) ~ 600 MPa. F \u2248 1,42\u00d7600\u00d7(2\u00b2)\/16 \u2248 213 kN\/m \u2248 21,7 t\u1ea5n\/m. V\u1edbi 1 m: ~21,7 t\u1ea5n. An to\u00e0n m\u00e1y \u2265 1,3\u00d7 t\u1ea3i t\u00ednh.<br \/>\n&#8211; T\u1ed1i thi\u1ec3u chi\u1ec1u d\u00e0i c\u00e1nh: \u2265 V\/2 + R \u2248 8 + 2,6 \u2248 10,6 mm (l\u00e0m tr\u00f2n 12 mm).<br \/>\n&#8211; Ghi ch\u00fa: n\u1ebfu m\u1eb7t 2B c\u1ea7n \u0111\u1eb9p, l\u00f3t phim PU \u0111\u1ec3 tr\u00e1nh h\u1eb1n v\u1ebft.<\/p>\n<h2 id=\"toc-6-checklist-truoc-khi-chay-lo-hang\">Checklist tr\u01b0\u1edbc khi ch\u1ea1y l\u00f4 h\u00e0ng<\/h2>\n<p>&#8211; X\u00e1c nh\u1eadn m\u00e1c Inox, t\u00ecnh tr\u1ea1ng b\u1ec1 m\u1eb7t (2B\/BA\/no.4), chi\u1ec1u d\u00e0y th\u1ef1c \u0111o.<br \/>\n&#8211; Quy \u0111\u1ecbnh R trong theo b\u1ea3n v\u1ebd v\u00e0 kh\u1ea3 n\u0103ng khu\u00f4n; ch\u1ecdn V theo 6\u201310\u00d7t.<br \/>\n&#8211; T\u00ednh l\u1ef1c ch\u1ea5n v\u00e0 ki\u1ec3m tra t\u1ea3i m\u00e1y; ch\u1ecdn ch\u00e0y\/c\u1ed1i t\u01b0\u01a1ng th\u00edch.<br \/>\n&#8211; Th\u1eed m\u1eabu 3\u20135 \u0111o\u1ea1n ng\u1eafn: \u0111o g\u00f3c, b\u00e1n k\u00ednh, chi\u1ec1u d\u00e0i; hi\u1ec7u ch\u1ec9nh overbend, K-factor.<br \/>\n&#8211; L\u1eadp tr\u00ecnh t\u1ef1 ch\u1ea5n, crowning, g\u1ed1i \u0111\u1ee1; chu\u1ea9n b\u1ecb phim b\u1ea3o v\u1ec7 n\u1ebfu c\u1ea7n.<br \/>\n&#8211; Ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3: g\u00f3c \u00b10,5\u20131\u00b0, dung sai k\u00edch th\u01b0\u1edbc; ghi l\u1ea1i tham s\u1ed1 chu\u1ea9n h\u00f3a.<\/p>\n<h2 id=\"toc-7-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/h2>\n<p>&#8211; Outokumpu Stainless Steel Handbook \u2013 khuy\u1ebfn ngh\u1ecb u\u1ed1n v\u00e0 b\u00e1n k\u00ednh t\u1ed1i thi\u1ec3u cho c\u00e1c nh\u00f3m Inox.<br \/>\n&#8211; SSINA (Specialty Steel Industry of North America) \u2013 Design Guidelines for Stainless Steel: b\u00e1n k\u00ednh, kho\u1ea3ng c\u00e1ch l\u1ed7 t\u1edbi \u0111\u01b0\u1eddng ch\u1ea5n, h\u01b0\u1edbng th\u1edb.<br \/>\n&#8211; The Fabricator, Steve Benson \u2013 Air bending fundamentals, inside radius \u2248 0,16V, springback v\u00e0 t\u00ednh l\u1ef1c ch\u1ea5n.<br \/>\n&#8211; TRUMPF\/Amada Press Brake Application Notes \u2013 l\u1ef1a ch\u1ecdn V, crowning v\u00e0 ki\u1ec3m so\u00e1t g\u00f3c.<\/p>\n<h2 id=\"toc-8-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>\u0110\u1ec3 lo\u1ea1i b\u1ecf n\u1ee9t, bi\u1ebfn d\u1ea1ng v\u00e0 sai g\u00f3c khi ch\u1ea5n Inox, h\u00e3y xu\u1ea5t ph\u00e1t t\u1eeb n\u1ec1n t\u1ea3ng \u0111\u00fang: ch\u1ecdn R v\u00e0 V h\u1ee3p l\u00fd theo m\u00e1c\/t, b\u00f9 \u0111\u00e0n h\u1ed3i d\u1ef1a tr\u00ean th\u1eed m\u1eabu, t\u1ed1i \u01b0u tr\u00ecnh t\u1ef1 v\u00e0 crowning, \u0111\u1ed3ng th\u1eddi chu\u1ea9n h\u00f3a K-factor v\u00e0 ki\u1ec3m chu\u1ea9n m\u00e1y. Th\u1ef1c thi \u0111\u00fang c\u00e1c nguy\u00ean t\u1eafc n\u00e0y s\u1ebd gi\u00fap g\u00f3c \u1ed5n \u0111\u1ecbnh, b\u1ec1 m\u1eb7t \u0111\u1eb9p, gi\u1ea3m ph\u1ebf ph\u1ea9m v\u00e0 t\u0103ng t\u1ed1c \u0111\u1ed9 giao h\u00e0ng. C\u1ea7n t\u01b0 v\u1ea5n ch\u1ecdn m\u00e1c Inox, b\u1ed9 khu\u00f4n v\u00e0 t\u1ed1i \u01b0u quy tr\u00ecnh ch\u1ea5n cho x\u01b0\u1edfng c\u1ee7a b\u1ea1n? Li\u00ean h\u1ec7 Inox C\u01b0\u1eddng Th\u1ecbnh \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n chi ti\u1ebft 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>H\u01b0\u1edbng d\u1eabn x\u1eed l\u00fd l\u1ed7i ch\u1ea5n Inox: n\u1ee9t m\u00e9p, bi\u1ebfn d\u1ea1ng, sai g\u00f3c. Ch\u1ecdn b\u00e1n k\u00ednh, mi\u1ec7ng c\u1ed1i, b\u00f9 \u0111\u00e0n h\u1ed3i, tr\u00ecnh t\u1ef1 v\u00e0 crowning chu\u1ea9n. C\u00f3 v\u00ed d\u1ee5 t\u00ednh nhanh.<\/p>\n","protected":false},"author":7,"featured_media":1044,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1830","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\/1830","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=1830"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1830\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1044"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1830"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1830"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1830"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}