{"id":1382,"date":"2025-12-02T12:34:24","date_gmt":"2025-12-02T05:34:24","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/chan-inox-bi-nut-bien-dang-sai-goc-nguyen-nhan-khac-phuc\/"},"modified":"2025-12-02T12:34:24","modified_gmt":"2025-12-02T05:34:24","slug":"chan-inox-bi-nut-bien-dang-sai-goc-nguyen-nhan-khac-phuc","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/chan-inox-bi-nut-bien-dang-sai-goc-nguyen-nhan-khac-phuc\/","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-tom-luoc-co-che-chan-inox-va-nhung-yeu-to-chi-phoi\">T\u00f3m l\u01b0\u1ee3c c\u01a1 ch\u1ebf ch\u1ea5n inox v\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 chi ph\u1ed1i<\/a><\/li>\n<li><a href=\"#toc-1-loi-1-nut-mep-khi-chan\">L\u1ed7i 1: N\u1ee9t m\u00e9p khi ch\u1ea5n<\/a><\/li>\n<li><a href=\"#toc-2-loi-2-bien-dang-venh-cong-nhan-xoan\">L\u1ed7i 2: Bi\u1ebfn d\u1ea1ng \u2013 v\u00eanh, cong, nh\u0103n, xo\u1eafn<\/a><\/li>\n<li><a href=\"#toc-3-loi-3-sai-goc-thieuqua-goc-do-lap-lai-kem\">L\u1ed7i 3: Sai g\u00f3c \u2013 thi\u1ebfu\/qua g\u00f3c, \u0111\u1ed9 l\u1eb7p l\u1ea1i k\u00e9m<\/a><\/li>\n<li><a href=\"#toc-4-checklist-chan-doan-nhanh-theo-trieu-chung\">Checklist ch\u1ea9n \u0111o\u00e1n nhanh theo tri\u1ec7u ch\u1ee9ng<\/a><\/li>\n<li><a href=\"#toc-5-vi-du-thuc-te-tai-xuong\">V\u00ed d\u1ee5 th\u1ef1c t\u1ebf t\u1ea1i x\u01b0\u1edfng<\/a><\/li>\n<li><a href=\"#toc-6-quy-tac-thiet-ke-de-ngua-hon-chua\">Quy t\u1eafc thi\u1ebft k\u1ebf \u0111\u1ec3 \u201cng\u1eeba h\u01a1n ch\u1eefa\u201d<\/a><\/li>\n<li><a href=\"#toc-7-nguon-tham-khao-ky-thuat\">Ngu\u1ed3n tham kh\u1ea3o k\u1ef9 thu\u1eadt<\/a><\/li>\n<li><a href=\"#toc-8-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Ch\u1ea5n inox l\u00e0 c\u00f4ng \u0111o\u1ea1n c\u1ed1t l\u00f5i trong ch\u1ebf t\u1ea1o c\u01a1 kh\u00ed t\u1ea5m v\u00e0 l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng c\u1ee7a C\u1ea9m nang K\u1ef9 thu\u1eadt Gia c\u00f4ng Inox. Tuy nhi\u00ean, ba l\u1ed7i \u201ckinh \u0111i\u1ec3n\u201d \u2013 n\u1ee9t m\u00e9p, bi\u1ebfn d\u1ea1ng (v\u00eanh, cong, nh\u0103n) v\u00e0 sai g\u00f3c \u2013 th\u01b0\u1eddng l\u00e0m t\u0103ng ph\u1ebf ph\u1ea9m, ch\u1eadm ti\u1ebfn \u0111\u1ed9. B\u00e0i vi\u1ebft n\u00e0y \u0111i th\u1eb3ng v\u00e0o nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5, th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ea7n n\u1eafm v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c tri\u1ec7t \u0111\u1ec3 ngay t\u1ea1i x\u01b0\u1edfng.<\/p>\n<h2 id=\"toc-0-tom-luoc-co-che-chan-inox-va-nhung-yeu-to-chi-phoi\">T\u00f3m l\u01b0\u1ee3c c\u01a1 ch\u1ebf ch\u1ea5n inox v\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 chi ph\u1ed1i<\/h2>\n<p>&#8211; \u0110\u1eb7c t\u00ednh v\u1eadt li\u1ec7u:<br \/>\n  &#8211; Austenitic (SUS304\/304L, 316): b\u1ec1n k\u00e9o cao, h\u00f3a b\u1ec1n nhanh, \u0111\u00e0n h\u1ed3i h\u1ed3i ph\u1ee5c l\u1edbn (springback cao).<br \/>\n  &#8211; Ferritic (430): \u0111\u1ed9 c\u1ee9ng th\u1ea5p h\u01a1n, springback th\u1ea5p h\u01a1n 304, d\u1ec5 n\u1ee9t h\u01a1n n\u1ebfu b\u00e1n k\u00ednh trong qu\u00e1 nh\u1ecf.<br \/>\n  &#8211; 201\/202: h\u00f3a b\u1ec1n m\u1ea1nh, nh\u1ea1y c\u1ea3m n\u1ee9t m\u00e9p khi R qu\u00e1 nh\u1ecf ho\u1eb7c m\u00e9p c\u1eaft c\u00f3 ba via.<br \/>\n&#8211; Springback: Inox th\u01b0\u1eddng ph\u1ea3i b\u00f9 \u0111\u00e0n h\u1ed3i l\u1edbn h\u01a1n th\u00e9p th\u01b0\u1eddng. Air-bending v\u1edbi 304 th\u01b0\u1eddng c\u1ea7n b\u00f9 3\u20137\u00b0, ph\u1ee5 thu\u1ed9c V, b\u00e1n k\u00ednh v\u00e0 chi\u1ec1u d\u00e0y.<br \/>\n&#8211; B\u00e1n k\u00ednh u\u1ed1n khi air-bend li\u00ean quan t\u1edbi V: r_in \u2248 0,16\u20130,2 \u00d7 V (v\u1edbi inox d\u00f9ng 0,18\u20130,2 \u00d7 V \u0111\u1ec3 \u01b0\u1edbc l\u01b0\u1ee3ng).<br \/>\n&#8211; L\u1ef1c ch\u1ea5n (x\u1ea5p x\u1ec9, air-bending): F (kN) = 1,42 \u00d7 \u03c3_b (N\/mm\u00b2) \u00d7 t\u00b2 \u00d7 L(mm) \/ V(mm). Ch\u1ecdn V l\u1edbn h\u01a1n v\u1edbi inox \u0111\u1ec3 gi\u1ea3m l\u1ef1c v\u00e0 v\u1ebft h\u1eb1n.<\/p>\n<p>Ngu\u1ed3n tham kh\u1ea3o: The Fabricator \u2013 Steve Benson; h\u01b0\u1edbng d\u1eabn t\u1ea1o h\u00ecnh inox c\u1ee7a Outokumpu\/SSINA.<\/p>\n<h2 id=\"toc-1-loi-1-nut-mep-khi-chan\">L\u1ed7i 1: N\u1ee9t m\u00e9p khi ch\u1ea5n<\/h2>\n<h3>D\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft<\/h3>\n<p>&#8211; V\u1ebft n\u1ee9t li ti \u0111\u1ebfn n\u1ee9t m\u1edf mi\u1ec7ng t\u1ea1i m\u00e9p ngo\u00e0i b\u00e1n k\u00ednh trong, th\u01b0\u1eddng th\u1ea5y r\u00f5 sau khi g\u1eadp 90\u2013135\u00b0.<br \/>\n&#8211; N\u1ee9t t\u1eadp trung t\u1ea1i v\u1ecb tr\u00ed m\u00e9p c\u1eaft, l\u1ed7\/kh\u00eda g\u1ea7n \u0111\u01b0\u1eddng u\u1ed1n, ho\u1eb7c n\u01a1i c\u00f3 bi\u1ebfn c\u1ee9ng do laser\/\u0111\u1ed9t d\u1eadp.<\/p>\n<h3>Nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5<\/h3>\n<p>&#8211; B\u00e1n k\u00ednh trong qu\u00e1 nh\u1ecf so v\u1edbi chi\u1ec1u d\u00e0y v\u00e0 h\u01b0\u1edbng v\u00e2n c\u00e1n.<br \/>\n&#8211; Ch\u1ecdn V-die qu\u00e1 h\u1eb9p, l\u1ef1c ch\u1ea5n l\u1edbn, bi\u1ebfn c\u1ee9ng c\u1ee5c b\u1ed9.<br \/>\n&#8211; M\u00e9p c\u1eaft c\u00f3 ba via, v\u1ebft kh\u00eda, HAZ (v\u00f9ng \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t) c\u1ee9ng do c\u1eaft laser\/plasma qu\u00e1 n\u00f3ng.<br \/>\n&#8211; B\u1ebb theo h\u01b0\u1edbng song song v\u00e2n c\u00e1n (bending with the grain) l\u00e0m t\u0103ng nguy c\u01a1 n\u1ee9t.<br \/>\n&#8211; V\u1eadt li\u1ec7u \u0111\u00e3 b\u1ecb h\u00f3a b\u1ec1n (t\u1ea5m c\u00e1n ngu\u1ed9i \u0111\u1ed9 c\u1ee9ng cao) ho\u1eb7c m\u00e1c 201\/430 k\u00e9m d\u1ebbo h\u01a1n 304.<br \/>\n&#8211; Coining\/bottoming qu\u00e1 m\u1ea1nh v\u1edbi m\u0169i ch\u00e0y b\u00e1n k\u00ednh nh\u1ecf.<\/p>\n<h3>Th\u00f4ng s\u1ed1 khuy\u1ebfn ngh\u1ecb \u0111\u1ec3 tr\u00e1nh n\u1ee9t<\/h3>\n<p>&#8211; B\u00e1n k\u00ednh trong t\u1ed1i thi\u1ec3u (t\u00e0i li\u1ec7u tham kh\u1ea3o Outokumpu\/SSINA):<br \/>\n  &#8211; 304\/316 (\u1ee7 m\u1ec1m): R_min \u2248 1,0t khi b\u1ebb vu\u00f4ng g\u00f3c v\u00e2n c\u00e1n; 1,5\u20132,0t khi b\u1ebb song song v\u00e2n c\u00e1n.<br \/>\n  &#8211; 430\/201: n\u00ean b\u1eaft \u0111\u1ea7u t\u1eeb 1,5\u20132,0t (t\u0103ng th\u00eam n\u1ebfu b\u1ec1 m\u1eb7t c\u00f3 v\u1ebft x\u01b0\u1edbc\/ba via).<br \/>\n&#8211; Ch\u1ecdn V-die:<br \/>\n  &#8211; Air-bending inox: V \u2248 8t (ph\u1ed5 bi\u1ebfn 8\u201310t) \u0111\u1ec3 gi\u1ea3m l\u1ef1c v\u00e0 v\u1ebft h\u1eb1n; suy ra r_in \u2248 0,18\u20130,2V \u2248 1,4\u20132,0t.<br \/>\n&#8211; M\u00e9p v\u00e0 l\u1ed7:<br \/>\n  &#8211; Deburr bavia \u2265 0,1\u20130,2 mm; m\u00e0i ph\u00e1 v\u1ebft kh\u00eda tr\u01b0\u1edbc khi ch\u1ea5n.<br \/>\n  &#8211; Kho\u1ea3ng c\u00e1ch l\u1ed7 \u0111\u1ebfn \u0111\u01b0\u1eddng u\u1ed1n \u2265 R + 2t (an to\u00e0n cho inox m\u1ecfng v\u00e0 trung b\u00ecnh).<br \/>\n&#8211; L\u1ef1c ch\u1ea5n \u2013 v\u00ed d\u1ee5 t\u00ednh nhanh (SUS304, t=2 mm, L=1000 mm, \u03c3_b\u2248600 MPa, V=16 mm):<br \/>\n  &#8211; F \u2248 1,42\u00d7600\u00d7(2\u00b2)\u00d71000\/16 \u2248 213 kN \u2248 21,7 t\u1ea5n.<\/p>\n<p>Ngu\u1ed3n: The Fabricator (Bending basics), SSINA\/Outokumpu forming guidelines.<\/p>\n<h3>Bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c t\u1ee9c th\u1eddi t\u1ea1i x\u01b0\u1edfng<\/h3>\n<p>&#8211; T\u0103ng b\u00e1n k\u00ednh trong: \u0111\u1ed5i V-die l\u1edbn h\u01a1n ho\u1eb7c d\u00f9ng ch\u00e0y m\u0169i l\u1edbn; tr\u00e1nh coining khi \u0111\u00e3 c\u00f3 d\u1ea5u hi\u1ec7u n\u1ee9t.<br \/>\n&#8211; \u0110\u1ea3o h\u01b0\u1edbng t\u1ea5m: b\u1ebb vu\u00f4ng g\u00f3c v\u00e2n c\u00e1n n\u1ebfu c\u00f3 th\u1ec3.<br \/>\n&#8211; Gia nhi\u1ec7t c\u1ee5c b\u1ed9 nh\u1eb9 (kh\u00f4ng khuy\u1ebfn ngh\u1ecb \u0111\u1ea1i tr\u00e0 v\u1edbi inox ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t), \u01b0u ti\u00ean \u0111\u1ed5i th\u00f4ng s\u1ed1 V\/R.<br \/>\n&#8211; Lo\u1ea1i b\u1ecf HAZ v\u00e0 ba via: m\u00e0i m\u00e9p, phun bi nh\u1eb9, c\u1eaft l\u1ea1i b\u1eb1ng laser v\u1edbi kh\u00ed N2, gi\u1ea3m n\u0103ng l\u01b0\u1ee3ng v\u00e0o.<br \/>\n&#8211; D\u00f9ng phim\/urethane tr\u00ean m\u1eb7t khu\u00f4n \u0111\u1ec3 gi\u1ea3m c\u1ea5n \u2013 tr\u00e1nh t\u1eadp trung \u1ee9ng su\u1ea5t.<br \/>\n&#8211; V\u1edbi chi ti\u1ebft g\u00f3c trong h\u1eb9p: th\u00eam r\u00e3nh relieve \u1edf g\u00f3c tr\u01b0\u1edbc khi b\u1ebb, ho\u1eb7c chia th\u00e0nh hai nh\u00e1t b\u1ebb R l\u1edbn h\u01a1n.<\/p>\n<h2 id=\"toc-2-loi-2-bien-dang-venh-cong-nhan-xoan\">L\u1ed7i 2: Bi\u1ebfn d\u1ea1ng \u2013 v\u00eanh, cong, nh\u0103n, xo\u1eafn<\/h2>\n<h3>Bi\u1ec3u hi\u1ec7n<\/h3>\n<p>&#8211; T\u1ea5m b\u1ecb \u201cbow\u201d d\u1ecdc c\u1ea1nh sau khi b\u1ebb c\u1ea1nh d\u00e0i; xo\u1eafn c\u00e1nh m\u1ecfng; b\u1ec1 m\u1eb7t \u201coil canning\u201d.<br \/>\n&#8211; V\u1ebft h\u1eb1n s\u00e2u, m\u00f3p b\u1ec1 m\u1eb7t do khu\u00f4n c\u1ee9ng, chi ti\u1ebft kh\u00f4ng \u201cph\u1eb3ng\u201d khi g\u00e1 l\u1eafp.<\/p>\n<h3>Nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5<\/h3>\n<p>&#8211; \u1ee8ng su\u1ea5t d\u01b0 kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u (c\u1eaft n\u00f3ng, \u0111\u1ed9t l\u1ed7 d\u00e0y c\u1ea1nh \u0111\u01b0\u1eddng u\u1ed1n).<br \/>\n&#8211; Tr\u00ecnh t\u1ef1 b\u1ebb kh\u00f4ng h\u1ee3p l\u00fd: b\u1ebb c\u1ea1nh d\u00e0i tr\u01b0\u1edbc l\u00e0m k\u00e9o gi\u00e3n b\u1ea5t \u0111\u1ed1i x\u1ee9ng.<br \/>\n&#8211; Chi\u1ec1u d\u00e0i c\u00e1nh (flange) qu\u00e1 ng\u1eafn so v\u1edbi V: kh\u00f4ng \u0111\u1ee7 t\u1ef1a, b\u1ecb k\u00e9o v\u00eanh.<br \/>\n&#8211; B\u1ebb s\u00e1t l\u1ed7, khe, g\u00e2n d\u1eadp \u2013 v\u1eadt li\u1ec7u m\u1ecfng \u0111i, d\u1ec5 nh\u0103n.<br \/>\n&#8211; \u0110\u1ed9 v\u00f5ng m\u00e1y\/khu\u00f4n kh\u00f4ng \u0111\u01b0\u1ee3c b\u00f9 (kh\u00f4ng crowning), g\u00e1 \u0111\u1ee1 k\u00e9m.<\/p>\n<h3>Gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt<\/h3>\n<p>&#8211; Tr\u00ecnh t\u1ef1 v\u00e0 \u0111\u1ed1i x\u1ee9ng:<br \/>\n  &#8211; B\u1ebb c\u00e1c c\u1ea1nh \u0111\u1ed1i x\u1ee9ng \u0111\u1ec3 c\u00e2n b\u1eb1ng \u1ee9ng su\u1ea5t; c\u1ea1nh ng\u1eafn tr\u01b0\u1edbc, d\u00e0i sau.<br \/>\n  &#8211; Chia nh\u1ecf c\u1ea1nh d\u00e0i th\u00e0nh nhi\u1ec1u nh\u00e1t b\u1ebb \u201cprogressive\u201d v\u1edbi V ph\u00f9 h\u1ee3p.<br \/>\n&#8211; Ki\u1ec3m so\u00e1t g\u00e1 \u0111\u1ee1:<br \/>\n  &#8211; D\u00f9ng b\u00e0n \u0111\u1ee1 tr\u01b0\u1edbc\/sau, con l\u0103n \u0111\u1ee1, backgauge \u0111a \u0111i\u1ec3m; tr\u00e1nh \u201ctreo\u201d t\u1ea5m t\u1ef1 do.<br \/>\n&#8211; Th\u00f4ng s\u1ed1 v\u00e0 d\u1ee5ng c\u1ee5:<br \/>\n  &#8211; D\u00f9ng V l\u1edbn h\u01a1n cho c\u1ea1nh r\u1ea5t d\u00e0i \u0111\u1ec3 gi\u1ea3m l\u1ef1c t\u1eadp trung v\u00e0 v\u1ebft h\u1eb1n.<br \/>\n  &#8211; L\u00f3t phim\/urethane ch\u1ed1ng h\u1eb1n, d\u00f9ng khu\u00f4n \u0111\u00e1y radiused.<br \/>\n&#8211; Quy t\u1eafc thi\u1ebft k\u1ebf t\u1ed1i thi\u1ec3u:<br \/>\n  &#8211; Chi\u1ec1u d\u00e0i c\u00e1nh t\u1ed1i thi\u1ec3u L_min \u2265 0,7V + t (an to\u00e0n v\u1edbi inox).<br \/>\n  &#8211; Kho\u1ea3ng c\u00e1ch t\u1eeb l\u1ed7 \u0111\u1ebfn \u0111\u01b0\u1eddng u\u1ed1n \u2265 R + 2t; th\u00eam ch\u1ed1t ch\u1eb7n\/r\u00e3nh relieve khi b\u1eaft bu\u1ed9c b\u1ebb s\u00e1t.<br \/>\n&#8211; X\u1eed l\u00fd sau b\u1ebb:<br \/>\n  &#8211; Ch\u1ea1y qua m\u00e1y n\u1eafn con l\u0103n (roller leveler) ho\u1eb7c \u00e9p n\u1eafn th\u1ee7 c\u00f4ng v\u1edbi d\u01b0\u1ee1ng ph\u1eb3ng.<br \/>\n  &#8211; V\u1edbi t\u1ea5m b\u1ecb xo\u1eafn: gia t\u0103ng crowning, \u0111i\u1ec1u ch\u1ec9nh backgauge l\u1ec7ch \u0111\u1ec3 tri\u1ec7t xo\u1eafn.<\/p>\n<p>Ngu\u1ed3n tham kh\u1ea3o: The Fabricator; h\u01b0\u1edbng d\u1eabn thi\u1ebft k\u1ebf t\u1ea5m kim lo\u1ea1i c\u00f4ng nghi\u1ec7p.<\/p>\n<h2 id=\"toc-3-loi-3-sai-goc-thieuqua-goc-do-lap-lai-kem\">L\u1ed7i 3: Sai g\u00f3c \u2013 thi\u1ebfu\/qua g\u00f3c, \u0111\u1ed9 l\u1eb7p l\u1ea1i k\u00e9m<\/h2>\n<h3>Nguy\u00ean nh\u00e2n<\/h3>\n<p>&#8211; B\u00f9 \u0111\u00e0n h\u1ed3i ch\u01b0a \u0111\u1ee7 ho\u1eb7c qu\u00e1 m\u1ee9c; thay \u0111\u1ed5i \u0111\u1ed9 d\u00e0y v\u1eadt li\u1ec7u theo l\u00f4.<br \/>\n&#8211; Kh\u00f4ng b\u00f9 v\u00f5ng (crowning) theo chi\u1ec1u d\u00e0i; khu\u00f4n\/m\u00e1y m\u00f2n, m\u0169i ch\u00e0y kh\u00f4ng \u0111\u00fang R.<br \/>\n&#8211; T\u1ed1c \u0111\u1ed9, th\u1eddi gian d\u1eebng (dwell) thi\u1ebfu; g\u00f3c \u0111o\/feedback kh\u00f4ng theo th\u1eddi gian th\u1ef1c.<br \/>\n&#8211; Backgauge \u0111\u1eb7t sai, ph\u00f4i tr\u01b0\u1ee3t; nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng kh\u00f4ng \u1ed5n \u0111\u1ecbnh (\u1ea3nh h\u01b0\u1edfng c\u1ea3m bi\u1ebfn\/d\u1ea7u).<\/p>\n<h3>Thi\u1ebft l\u1eadp \u0111\u1ec3 \u0111\u1ea1t g\u00f3c \u0111\u00fang v\u00e0 l\u1eb7p l\u1ea1i<\/h3>\n<p>&#8211; B\u00f9 \u0111\u00e0n h\u1ed3i:<br \/>\n  &#8211; Inox austenitic: b\u1eaft \u0111\u1ea7u b\u00f9 3\u20137\u00b0 khi air-bending; \u0111i\u1ec1u ch\u1ec9nh theo g\u00f3c th\u1ef1c \u0111o.<br \/>\n  &#8211; T\u0103ng dwell 0,5\u20131 s \u1edf \u0111\u00e1y \u0111\u1ec3 \u1ed5n \u0111\u1ecbnh bi\u1ebfn d\u1ea1ng \u0111\u00e0n h\u1ed3i.<br \/>\n&#8211; Crowning:<br \/>\n  &#8211; B\u1eadt crowning t\u1ef1 \u0111\u1ed9ng theo chi\u1ec1u d\u00e0i; n\u1ebfu th\u1ee7 c\u00f4ng: t\u0103ng crowning khi g\u00f3c 2 \u0111\u1ea7u kh\u00e1c gi\u1eefa.<br \/>\n&#8211; D\u1ee5ng c\u1ee5:<br \/>\n  &#8211; Ch\u1ecdn m\u0169i ch\u00e0y c\u00f3 R \u2248 r_in mong mu\u1ed1n (air-bending) \u0111\u1ec3 \u1ed5n \u0111\u1ecbnh g\u00f3c; tr\u00e1nh m\u0169i qu\u00e1 nh\u1ecdn.<br \/>\n  &#8211; Ki\u1ec3m tra m\u00f2n, l\u1ec7ch t\u00e2m; v\u1ec7 sinh khu\u00f4n \u0111\u1ecbnh k\u1ef3 \u0111\u1ec3 tr\u00e1nh \u201cc\u1eafn\u201d v\u1eadt li\u1ec7u.<br \/>\n&#8211; \u0110o l\u01b0\u1eddng v\u00e0 d\u1eef li\u1ec7u:<br \/>\n  &#8211; S\u1eed d\u1ee5ng th\u01b0\u1edbc \u0111o g\u00f3c online, c\u1ea3m bi\u1ebfn g\u00f3c\/\u00e1p; x\u00e2y \u201cb\u1ea3ng b\u00f9\u201d theo t\u1eebng m\u00e1c\/t v\u00e0 V.<br \/>\n  &#8211; K-factor cho t\u00ednh tri\u1ec3n khai chi\u1ec1u d\u00e0i: 0,38\u20130,50 cho inox (hi\u1ec7u chu\u1ea9n theo m\u1eabu th\u1eed). C\u00f4ng th\u1ee9c BA = (\u03c0\/180)\u00d7G\u00f3c\u00d7(R + K\u00d7t).<\/p>\n<h2 id=\"toc-4-checklist-chan-doan-nhanh-theo-trieu-chung\">Checklist ch\u1ea9n \u0111o\u00e1n nhanh theo tri\u1ec7u ch\u1ee9ng<\/h2>\n<p>&#8211; N\u1ebfu n\u1ee9t:<br \/>\n  &#8211; T\u0103ng V (\u2192 t\u0103ng r_in), \u0111\u1ed5i h\u01b0\u1edbng b\u1ebb vu\u00f4ng g\u00f3c v\u00e2n c\u00e1n, m\u00e0i lo\u1ea1i b\u1ecf bavia\/HAZ, ch\u1ecdn m\u00e1c d\u1ebbo h\u01a1n (304L), tr\u00e1nh coining n\u1eb7ng.<br \/>\n&#8211; N\u1ebfu v\u00eanh\/xo\u1eafn:<br \/>\n  &#8211; \u0110i\u1ec1u ch\u1ec9nh tr\u00ecnh t\u1ef1 b\u1ebb, t\u0103ng crowning, th\u00eam \u0111\u1ee1, d\u00f9ng V l\u1edbn\/film b\u1ea3o v\u1ec7, ki\u1ec3m tra kho\u1ea3ng c\u00e1ch l\u1ed7\u2013\u0111\u01b0\u1eddng u\u1ed1n.<br \/>\n&#8211; N\u1ebfu sai g\u00f3c\/l\u1eb7p l\u1ea1i k\u00e9m:<br \/>\n  &#8211; T\u0103ng b\u00f9 \u0111\u00e0n h\u1ed3i v\u00e0 dwell, hi\u1ec7u chu\u1ea9n K-factor\/b\u1ea3ng b\u00f9 theo l\u00f4 v\u1eadt li\u1ec7u, ki\u1ec3m tra m\u00f2n khu\u00f4n v\u00e0 backgauge, b\u1eadt c\u1ea3m bi\u1ebfn g\u00f3c.<\/p>\n<h2 id=\"toc-5-vi-du-thuc-te-tai-xuong\">V\u00ed d\u1ee5 th\u1ef1c t\u1ebf t\u1ea1i x\u01b0\u1edfng<\/h2>\n<p>&#8211; T\u1ea5m SUS304 2,0 mm, c\u1ea1nh d\u00e0i 1200 mm b\u1ecb n\u1ee9t m\u00e9p \u1edf g\u00f3c 90\u00b0:<br \/>\n  &#8211; Ban \u0111\u1ea7u: V=6t (12 mm), b\u1ebb song song v\u00e2n c\u00e1n, m\u00e9p c\u1eaft laser c\u00f3 bavia.<br \/>\n  &#8211; X\u1eed l\u00fd: t\u0103ng V=16 mm (~8t), xoay ph\u00f4i b\u1ebb vu\u00f4ng g\u00f3c v\u00e2n c\u00e1n, m\u00e0i ph\u00e1 bavia; k\u1ebft qu\u1ea3: h\u1ebft n\u1ee9t, g\u00f3c \u1ed5n \u0111\u1ecbnh sau b\u00f9 4\u00b0.<br \/>\n&#8211; C\u00e1nh t\u1ee7 SUS201 1,2 mm b\u1ecb v\u00eanh sau b\u1ebb c\u1ea1nh d\u00e0i:<br \/>\n  &#8211; \u00c1p d\u1ee5ng tr\u00ecnh t\u1ef1 b\u1ebb c\u1ea1nh ng\u1eafn tr\u01b0\u1edbc, th\u00eam \u0111\u1ee1 con l\u0103n v\u00e0 film urethane, t\u0103ng crowning; \u0111\u1ed9 v\u00eanh gi\u1ea3m t\u1eeb 2,5 mm xu\u1ed1ng <0,5 mm\/1000 mm.\n\n\n\n<h2 id=\"toc-6-quy-tac-thiet-ke-de-ngua-hon-chua\">Quy t\u1eafc thi\u1ebft k\u1ebf \u0111\u1ec3 \u201cng\u1eeba h\u01a1n ch\u1eefa\u201d<\/h2>\n<p>&#8211; Ch\u1ecdn m\u00e1c: \u01b0u ti\u00ean 304\/304L cho chi ti\u1ebft y\u00eau c\u1ea7u b\u1ec1 m\u1eb7t\/g\u00f3c ch\u00ednh x\u00e1c; c\u00e2n nh\u1eafc t\u0103ng R khi d\u00f9ng 201\/430.<br \/>\n&#8211; B\u1ed1 tr\u00ed l\u1ed7\/g\u00e2n: c\u00e1ch \u0111\u01b0\u1eddng u\u1ed1n \u2265 R + 2t; th\u00eam r\u00e3nh relieve t\u1ea1i g\u00f3c u\u1ed1n k\u00edn.<br \/>\n&#8211; \u0110\u1ecbnh h\u01b0\u1edbng c\u00e1n: \u01b0u ti\u00ean b\u1ebb vu\u00f4ng g\u00f3c v\u00e2n c\u00e1n v\u1edbi g\u00f3c nh\u1ecf v\u00e0 R nh\u1ecf.<br \/>\n&#8211; D\u1ef1 ph\u00f2ng b\u00e1n k\u00ednh: \u0111\u1eb7t R thi\u1ebft k\u1ebf \u2265 1,0t (304) v\u00e0 \u2265 1,5t (201\/430); minh h\u1ecda th\u00f4ng s\u1ed1 V t\u01b0\u01a1ng \u1ee9ng.<br \/>\n&#8211; Chu\u1ea9n h\u00f3a d\u1eef li\u1ec7u: x\u00e2y th\u01b0 vi\u1ec7n \u201cmaterial card\u201d g\u1ed3m \u03c3_b, K-factor, b\u00f9 \u0111\u00e0n h\u1ed3i theo t\u1eebng m\u00e1c\/t v\u00e0 V.<\/p>\n<h2 id=\"toc-7-nguon-tham-khao-ky-thuat\">Ngu\u1ed3n tham kh\u1ea3o k\u1ef9 thu\u1eadt<\/h2>\n<p>&#8211; The Fabricator \u2013 Bending basics: fundamentals of press brake tooling (Steve Benson): https:\/\/www.thefabricator.com\/thefabricator\/article\/bending\/bending-basics-the-fundamentals-of-press-brake-tooling<br \/>\n&#8211; SSINA \u2013 Forming Stainless Steel: https:\/\/www.ssina.com\/education\/ and t\u00e0i li\u1ec7u thi\u1ebft k\u1ebf<br \/>\n&#8211; Outokumpu \u2013 Forming of Stainless Steel (guidelines): https:\/\/www.outokumpu.com\/en\/what-we-do\/services\/technical-guidelines\/forming-of-stainless-steel<br \/>\n&#8211; TRUMPF \u2013 Know-how bending (c\u00e1c nguy\u00ean l\u00fd ch\u1ea5n v\u00e0 b\u00f9 \u0111\u00e0n h\u1ed3i): https:\/\/www.trumpf.com<br \/>\n&#8211; Amada \u2013 Tonnage\/radius guidelines for air bending: https:\/\/www.amada.com<\/p>\n<h2 id=\"toc-8-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>&#8211; N\u1ee9t x\u1ea3y ra khi R v\u00e0 V kh\u00f4ng ph\u00f9 h\u1ee3p, m\u00e9p c\u1eaft x\u1ea5u, h\u01b0\u1edbng v\u00e2n c\u00e1n b\u1ea5t l\u1ee3i; kh\u1eafc ph\u1ee5c b\u1eb1ng t\u0103ng V\/R, \u0111\u1ea3o h\u01b0\u1edbng c\u00e1n, x\u1eed l\u00fd m\u00e9p v\u00e0 t\u1ed1i \u01b0u l\u1ef1c.<br \/>\n&#8211; Bi\u1ebfn d\u1ea1ng (v\u00eanh, nh\u0103n) ch\u1ee7 y\u1ebfu do \u1ee9ng su\u1ea5t d\u01b0 v\u00e0 h\u1ed7 tr\u1ee3 kh\u00f4ng \u0111\u1ec1u; gi\u1ea3i quy\u1ebft b\u1eb1ng tr\u00ecnh t\u1ef1 b\u1ebb h\u1ee3p l\u00fd, crowning, \u0111\u1ee1 v\u1eadt li\u1ec7u v\u00e0 quy t\u1eafc thi\u1ebft k\u1ebf t\u1ed1i thi\u1ec3u.<br \/>\n&#8211; Sai g\u00f3c do springback v\u00e0 v\u00f5ng m\u00e1y; c\u1ea7n b\u00f9 \u0111\u00e0n h\u1ed3i 3\u20137\u00b0 cho inox, dwell, crowning v\u00e0 ki\u1ec3m so\u00e1t d\u1eef li\u1ec7u (K-factor, b\u1ea3ng b\u00f9 theo l\u00f4).<br \/>\nTu\u00e2n th\u1ee7 c\u00e1c th\u00f4ng s\u1ed1 c\u1ed1t l\u00f5i (V\u22488\u201310t cho inox, R_in \u2265 1,0\u20132,0t t\u00f9y m\u00e1c\/h\u01b0\u1edbng c\u00e1n), k\u1ebft h\u1ee3p quy tr\u00ecnh \u0111o\u2013b\u00f9 theo l\u00f4 v\u1eadt li\u1ec7u s\u1ebd gi\u00fap lo\u1ea1i b\u1ecf ph\u1ea7n l\u1edbn ph\u1ebf ph\u1ea9m, \u1ed5n \u0111\u1ecbnh ch\u1ea5t l\u01b0\u1ee3ng ch\u1ea5n.<\/p>\n<p>C\u1ea7n file th\u00f4ng s\u1ed1 theo m\u00e1c inox b\u1ea1n \u0111ang d\u00f9ng ho\u1eb7c t\u01b0 v\u1ea5n t\u1ed1i \u01b0u V\/R cho b\u1ed9 khu\u00f4n hi\u1ec7n c\u00f3? 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.<br \/>\nHotline: 0343.417.281<br \/>\nEmail: inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn x\u1eed l\u00fd n\u1ee9t, bi\u1ebfn d\u1ea1ng, sai g\u00f3c khi ch\u1ea5n inox: nguy\u00ean nh\u00e2n, th\u00f4ng s\u1ed1 V\/b\u00e1n k\u00ednh\/l\u1ef1c, b\u00f9 \u0111\u00e0n h\u1ed3i v\u00e0 quy tr\u00ecnh ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng t\u1ea1i x\u01b0\u1edfng.<\/p>\n","protected":false},"author":7,"featured_media":1028,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1382","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\/1382","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=1382"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1382\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1028"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1382"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1382"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}