{"id":1822,"date":"2026-03-25T00:37:25","date_gmt":"2026-03-24T17:37:25","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/chan-gap-inox-tam-chon-dao-coi-va-tinh-goc-chan-chinh-xac\/"},"modified":"2026-03-25T00:37:25","modified_gmt":"2026-03-24T17:37:25","slug":"chan-gap-inox-tam-chon-dao-coi-va-tinh-goc-chan-chinh-xac","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/chan-gap-inox-tam-chon-dao-coi-va-tinh-goc-chan-chinh-xac\/","title":{"rendered":"Ch\u1ea5n g\u1ea5p Inox t\u1ea5m: ch\u1ecdn dao\u2013c\u1ed1i v\u00e0 t\u00ednh g\u00f3c ch\u1ea5n ch\u00ednh x\u00e1c"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-tong-quan-nhanh-phuong-phap-chan-va-khi-nao-dung\">T\u1ed5ng quan nhanh: ph\u01b0\u01a1ng ph\u00e1p ch\u1ea5n v\u00e0 khi n\u00e0o d\u00f9ng<\/a><\/li>\n<li><a href=\"#toc-1-chon-coi-v-die-theo-chieu-day-va-yeu-cau-ban-kinh\">Ch\u1ecdn c\u1ed1i (V-die) theo chi\u1ec1u d\u00e0y v\u00e0 y\u00eau c\u1ea7u b\u00e1n k\u00ednh<\/a><\/li>\n<li><a href=\"#toc-2-chon-chay-dao-goc-ban-kinh-va-tai-trong\">Ch\u1ecdn ch\u00e0y (dao): g\u00f3c, b\u00e1n k\u00ednh v\u00e0 t\u1ea3i tr\u1ecdng<\/a><\/li>\n<li><a href=\"#toc-3-tinh-luc-chan-tonnage-cong-thuc-va-vi-du\">T\u00ednh l\u1ef1c ch\u1ea5n (tonnage): c\u00f4ng th\u1ee9c v\u00e0 v\u00ed d\u1ee5<\/a><\/li>\n<li><a href=\"#toc-4-tinh-ban-kinh-ba-bd-va-chieu-dai-trien-flat-length\">T\u00ednh b\u00e1n k\u00ednh, BA, BD v\u00e0 chi\u1ec1u d\u00e0i tri\u1ec3n (flat length)<\/a><\/li>\n<li><a href=\"#toc-5-kiem-soat-hoi-xuan-springback-va-dat-goc-chinh-xac\">Ki\u1ec3m so\u00e1t h\u1ed3i xu\u00e2n (springback) v\u00e0 \u0111\u1ea1t g\u00f3c ch\u00ednh x\u00e1c<\/a><\/li>\n<li><a href=\"#toc-6-trinh-tu-chan-chieu-hat-can-va-gioi-han-mep-nho-nh\">Tr\u00ecnh t\u1ef1 ch\u1ea5n, chi\u1ec1u h\u1ea1t c\u00e1n v\u00e0 gi\u1edbi h\u1ea1n m\u00e9p nh\u1ecf nh\u1ea5t<\/a><\/li>\n<li><a href=\"#toc-7-bao-ve-be-mat-va-dung-sai\">B\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t v\u00e0 dung sai<\/a><\/li>\n<li><a href=\"#toc-8-loi-thuong-gap-va-cach-khac-phuc\">L\u1ed7i th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c<\/a><\/li>\n<li><a href=\"#toc-9-checklist-nhanh-truoc-khi-chan-inox\">Checklist nhanh tr\u01b0\u1edbc khi ch\u1ea5n Inox<\/a><\/li>\n<li><a href=\"#toc-10-vi-du-tong-hop-tu-chon-dung-cu-den-tinh-luc-va-goc\">V\u00ed d\u1ee5 t\u1ed5ng h\u1ee3p: t\u1eeb ch\u1ecdn d\u1ee5ng c\u1ee5 \u0111\u1ebfn t\u00ednh l\u1ef1c v\u00e0 g\u00f3c<\/a><\/li>\n<li><a href=\"#toc-11-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-12-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Trong gia c\u00f4ng Inox t\u1ea5m, ch\u1ea5t l\u01b0\u1ee3ng g\u00f3c ch\u1ea5n, \u0111\u1ed9 ch\u00ednh x\u00e1c k\u00edch th\u01b0\u1edbc v\u00e0 b\u1ec1 m\u1eb7t ph\u1ee5 thu\u1ed9c tr\u1ef1c ti\u1ebfp v\u00e0o vi\u1ec7c ch\u1ecdn dao\u2013c\u1ed1i \u0111\u00fang v\u00e0 t\u00ednh to\u00e1n chu\u1ea9n ngay t\u1eeb \u0111\u1ea7u. B\u00e0i vi\u1ebft n\u00e0y l\u00e0 h\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7: so s\u00e1nh ph\u01b0\u01a1ng ph\u00e1p ch\u1ea5n, quy t\u1eafc ch\u1ecdn V-die v\u00e0 ch\u00e0y, c\u00f4ng th\u1ee9c t\u00ednh l\u1ef1c ch\u1ea5n, b\u00e1n k\u00ednh trong, BA\/BD, K\u2011factor, ki\u1ec3m so\u00e1t h\u1ed3i xu\u00e2n, c\u00f9ng c\u00e1c v\u00ed d\u1ee5 th\u1ef1c t\u1ebf \u0111\u1ec3 \u00e1p d\u1ee5ng ngay t\u1ea1i x\u01b0\u1edfng.<\/p>\n<h2 id=\"toc-0-tong-quan-nhanh-phuong-phap-chan-va-khi-nao-dung\">T\u1ed5ng quan nhanh: ph\u01b0\u01a1ng ph\u00e1p ch\u1ea5n v\u00e0 khi n\u00e0o d\u00f9ng<\/h2>\n<p>&#8211; Air bending (ch\u1ea5n n\u1ed5i): Ph\u1ed5 bi\u1ebfn nh\u1ea5t. Linh ho\u1ea1t g\u00f3c, l\u1ef1c ch\u1ea5n th\u1ea5p. B\u1ecb \u1ea3nh h\u01b0\u1edfng h\u1ed3i xu\u00e2n, c\u1ea7n b\u00f9 g\u00f3c. Ph\u00f9 h\u1ee3p \u0111a s\u1ed1 chi ti\u1ebft Inox.<br \/>\n&#8211; Bottoming (\u00e9p \u0111\u00e1y): Ph\u00f4i t\u1ef3 \u0111\u00e1y c\u1ed1i. G\u00f3c l\u1eb7p l\u1ea1i \u1ed5n \u0111\u1ecbnh h\u01a1n, h\u1ed3i xu\u00e2n \u00edt h\u01a1n air bending. L\u1ef1c cao h\u01a1n, d\u1ec5 \u0111\u1ec3 l\u1ea1i v\u1ebft; c\u1ea7n d\u1ee5ng c\u1ee5 chu\u1ea9n.<br \/>\n&#8211; Coining (d\u1eadp ch\u1ea3y): \u00c9p th\u1ea5m s\u00e2u tri\u1ec7t h\u1ed3i xu\u00e2n. L\u1ef1c r\u1ea5t cao (3\u20135 l\u1ea7n air bending). Kh\u00f4ng khuy\u1ebfn ngh\u1ecb cho Inox d\u00e0y v\u00ec bi\u1ebfn c\u1ee9ng m\u1ea1nh, r\u1ee7i ro n\u1ee9t v\u00e0 hao m\u00f2n d\u1ee5ng c\u1ee5, ch\u1ec9 d\u00f9ng cho t\u00f4n m\u1ecfng v\u00e0 b\u00e1n k\u00ednh r\u1ea5t nh\u1ecf.<\/p>\n<p>G\u1ee3i \u00fd cho Inox: \u01afu ti\u00ean air bending; ch\u1ec9 d\u00f9ng bottoming khi c\u1ea7n \u0111\u1ed9 l\u1eb7p l\u1ea1i g\u00f3c cao\/\u00edt b\u00f9 g\u00f3c; h\u1ea1n ch\u1ebf coining.<\/p>\n<h2 id=\"toc-1-chon-coi-v-die-theo-chieu-day-va-yeu-cau-ban-kinh\">Ch\u1ecdn c\u1ed1i (V-die) theo chi\u1ec1u d\u00e0y v\u00e0 y\u00eau c\u1ea7u b\u00e1n k\u00ednh<\/h2>\n<h3>Quy t\u1eafc ch\u1ecdn kh\u1ea9u \u0111\u1ed9 V<\/h3>\n<p>&#8211; Quy t\u1eafc th\u1ef1c t\u1ebf cho Inox (do c\u00f3 gi\u1edbi h\u1ea1n b\u1ec1n cao v\u00e0 h\u1ed3i xu\u00e2n l\u1edbn h\u01a1n th\u00e9p th\u01b0\u1eddng):<br \/>\n  &#8211; t \u2264 3 mm: V \u2248 6\u20138 \u00d7 t<br \/>\n  &#8211; 3 mm < t \u2264 8 mm: V \u2248 8\u201310 \u00d7 t\n  - t > 8 mm: V \u2248 10\u201312 \u00d7 t<br \/>\n&#8211; Ch\u1ecdn V l\u1edbn gi\u00fap gi\u1ea3m l\u1ef1c ch\u1ea5n v\u00e0 v\u1ebft h\u1eb1n, nh\u01b0ng t\u0103ng b\u00e1n k\u00ednh trong; V nh\u1ecf cho b\u00e1n k\u00ednh nh\u1ecf v\u00e0 gi\u1ea3m h\u1ed3i xu\u00e2n, nh\u01b0ng l\u1ef1c t\u0103ng v\u00e0 d\u1ec5 x\u01b0\u1edbc.<\/p>\n<h3>Li\u00ean h\u1ec7 gi\u1eefa V-die v\u00e0 b\u00e1n k\u00ednh trong<\/h3>\n<p>&#8211; V\u1edbi air bending, n\u1ebfu ch\u00f3p ch\u00e0y s\u1eafc (R_punch nh\u1ecf), b\u00e1n k\u00ednh trong \u01b0\u1edbc t\u00ednh: Ri \u2248 0.16\u20130.20 \u00d7 V (Inox th\u01b0\u1eddng l\u1ea5y 0.18\u20130.20 \u00d7 V).<br \/>\n&#8211; N\u1ebfu R_punch > (0.18 \u00d7 V), Ri \u2248 R_punch (b\u00e1n k\u00ednh theo ch\u00e0y).<br \/>\n&#8211; Ngh\u0129a l\u00e0:<br \/>\n  &#8211; C\u1ea7n Ri nh\u1ecf: gi\u1ea3m V ho\u1eb7c d\u00f9ng ch\u00e0y c\u00f3 R l\u1edbn h\u01a1n \u201cb\u00e1n k\u00ednh do V g\u00e2y ra\u201d.<br \/>\n  &#8211; C\u1ea7n Ri l\u1edbn, h\u1ea1n ch\u1ebf v\u1ebft: t\u0103ng V v\u00e0\/ho\u1eb7c t\u0103ng R_punch.<\/p>\n<h3>V\u1eadt li\u1ec7u v\u00e0 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t c\u1ed1i<\/h3>\n<p>&#8211; \u01afu ti\u00ean c\u1ed1i th\u00e9p c\u00f4ng c\u1ee5 \u0111\u00e3 t\u00f4i ho\u1eb7c nitride, ph\u1ee7 TiN\/TiCN ho\u1eb7c chrome c\u1ee9ng \u0111\u1ec3 gi\u1ea3m d\u00ednh b\u00e1m (galling) khi ch\u1ea5n Inox.<br \/>\n&#8211; D\u00f9ng phim b\u1ea3o v\u1ec7 (urethane\/foli) ho\u1eb7c c\u1ed1i vai tr\u00f2n \u0111\u1ec3 tr\u00e1nh h\u1eb1n b\u1ec1 m\u1eb7t Inox hairline\/HL, No.4.<\/p>\n<h2 id=\"toc-2-chon-chay-dao-goc-ban-kinh-va-tai-trong\">Ch\u1ecdn ch\u00e0y (dao): g\u00f3c, b\u00e1n k\u00ednh v\u00e0 t\u1ea3i tr\u1ecdng<\/h2>\n<p>&#8211; G\u00f3c ch\u00e0y: 85\u201390\u00b0 cho air bending (ph\u1ed5 bi\u1ebfn 88\u00b0). Ch\u00e0y g\u00f3c nh\u1ecdn gi\u00fap b\u00e1m ph\u00f4i khi b\u00f9 g\u00f3c.<br \/>\n&#8211; B\u00e1n k\u00ednh ch\u00f3p ch\u00e0y (R_punch):<br \/>\n  &#8211; N\u1ebfu mu\u1ed1n ki\u1ec3m so\u00e1t Ri, ch\u1ecdn R_punch \u2265 0.18 \u00d7 V.<br \/>\n  &#8211; N\u1ebfu \u01b0u ti\u00ean l\u1ef1c th\u1ea5p\/h\u1ea1n ch\u1ebf v\u1ebft \u1edf T nh\u1ecf, d\u00f9ng R_punch nh\u1ecf h\u01a1n v\u00e0 \u0111i\u1ec1u khi\u1ec3n Ri theo V.<br \/>\n&#8211; \u0110\u1ed9 b\u1ec1n ch\u00e0y: ch\u1ecdn lo\u1ea1i ch\u1ecbu m\u00e0i m\u00f2n cao, ph\u1ee7 c\u1ee9ng khi ch\u1ea5n Inox s\u1ed1 l\u01b0\u1ee3ng l\u1edbn.<br \/>\n&#8211; Ki\u1ec3m tra t\u1ea3i tr\u1ecdng cho t\u1eebng lo\u1ea1i ch\u00e0y\/d\u00e0i \u0111o\u1ea1n ch\u1ea5n theo catalog nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n<h2 id=\"toc-3-tinh-luc-chan-tonnage-cong-thuc-va-vi-du\">T\u00ednh l\u1ef1c ch\u1ea5n (tonnage): c\u00f4ng th\u1ee9c v\u00e0 v\u00ed d\u1ee5<\/h2>\n<h3>C\u00f4ng th\u1ee9c \u01b0\u1edbc t\u00ednh l\u1ef1c air bending<\/h3>\n<p>&#8211; F (kN\/m) \u2248 1.42 \u00d7 \u03c3UTS \u00d7 t\u00b2 \/ V<br \/>\n  &#8211; \u03c3UTS: gi\u1edbi h\u1ea1n b\u1ec1n k\u00e9o v\u1eadt li\u1ec7u (N\/mm\u00b2)<br \/>\n  &#8211; t: chi\u1ec1u d\u00e0y (mm)<br \/>\n  &#8211; V: kh\u1ea9u \u0111\u1ed9 c\u1ed1i (mm)<br \/>\n&#8211; L\u1ef1c t\u1ed5ng F_total = F \u00d7 L (v\u1edbi L l\u00e0 chi\u1ec1u d\u00e0i \u0111o\u1ea1n ch\u1ea5n, m).<br \/>\n&#8211; D\u1ef1 ph\u00f2ng an to\u00e0n m\u00e1y: 20\u201330% so v\u1edbi l\u1ef1c t\u00ednh.<\/p>\n<p>Tham s\u1ed1 \u03c3UTS tham kh\u1ea3o:<br \/>\n&#8211; SUS304: 520\u2013620 MPa (d\u00f9ng 600 MPa khi t\u00ednh an to\u00e0n)<br \/>\n&#8211; SUS316: 550\u2013620 MPa<br \/>\n&#8211; SUS201: 650\u2013800 MPa (kh\u00f3 ch\u1ea5n h\u01a1n 304)<br \/>\n&#8211; SUS430: 450\u2013550 MPa (\u0111\u1ed9 gi\u00e3n d\u00e0i th\u1ea5p h\u01a1n, d\u1ec5 n\u1ee9t \u1edf b\u00e1n k\u00ednh nh\u1ecf)<\/p>\n<p>V\u00ed d\u1ee5 1 (t\u00ednh nhanh):<br \/>\n&#8211; Inox 304, t = 2.0 mm, ch\u1ecdn V = 16 mm (\u2248 8\u00d7t), L = 1.0 m<br \/>\n&#8211; F (kN\/m) = 1.42 \u00d7 600 \u00d7 (2\u00b2) \/ 16 = 1.42 \u00d7 600 \u00d7 4 \/ 16 = 213 kN\/m<br \/>\n&#8211; \u0110\u1ed5i t\u1ea5n\/m: 213 \/ 9.81 \u2248 21.7 t\/m \u2192 \u0110o\u1ea1n 1 m c\u1ea7n \u2248 21.7 t.<br \/>\n&#8211; M\u00e1y 80 t ch\u1ea5n 2 m? L\u1ef1c \u2248 43.4 t < 80 t (ok), nh\u01b0ng c\u1ea7n t\u00ednh th\u00eam h\u1ec7 s\u1ed1 an to\u00e0n v\u00e0 crowning.\n\n\n\n<h2 id=\"toc-4-tinh-ban-kinh-ba-bd-va-chieu-dai-trien-flat-length\">T\u00ednh b\u00e1n k\u00ednh, BA, BD v\u00e0 chi\u1ec1u d\u00e0i tri\u1ec3n (flat length)<\/h2>\n<h3>K-factor v\u00e0 c\u00f4ng th\u1ee9c<\/h3>\n<p>&#8211; K-factor (t\u1ef7 l\u1ec7 v\u1ecb tr\u00ed tr\u1ee5c trung h\u00f2a): Inox air bending th\u01b0\u1eddng 0.42\u20130.50 (khuy\u1ebfn ngh\u1ecb kh\u1edfi t\u1ea1o 0.45 cho 304\/316); bottoming ~0.35\u20130.40; coining ~0.30\u20130.33.<br \/>\n&#8211; B\u00e1n k\u00ednh trong Ri:<br \/>\n  &#8211; N\u1ebfu R_punch \u2264 0.18 \u00d7 V: Ri \u2248 0.18 \u00d7 V (Inox)<br \/>\n  &#8211; N\u1ebfu R_punch > 0.18 \u00d7 V: Ri \u2248 R_punch<\/p>\n<p>C\u00f4ng th\u1ee9c:<br \/>\n&#8211; BA (bend allowance) = \u03b8(rad) \u00d7 (Ri + K \u00d7 t)<br \/>\n  &#8211; \u03b8(rad) = \u03b8(\u0111\u1ed9) \u00d7 \u03c0\/180<br \/>\n&#8211; Setback SB = (Ri + t) \u00d7 tan(\u03b8\/2)<br \/>\n&#8211; BD (bend deduction) = 2 \u00d7 SB \u2212 BA<br \/>\n&#8211; Flat length FL = L1 + L2 \u2212 BD (v\u1edbi L1, L2 l\u00e0 c\u00e1nh \u0111o \u0111\u1ebfn \u0111\u1ec9nh giao h\u00ecnh h\u1ecdc)<\/p>\n<h3>V\u00ed d\u1ee5 t\u00ednh BA\/BD v\u00e0 FL<\/h3>\n<p>Y\u00eau c\u1ea7u: Inox 304, t = 1.5 mm, g\u00f3c 90\u00b0, c\u1ea7n Ri \u2248 1.5 mm, c\u00e1nh L1 = 40 mm, L2 = 30 mm.<br \/>\n&#8211; Ch\u1ecdn V \u0111\u1ec3 \u0111\u1ea1t Ri:<br \/>\n  &#8211; Mu\u1ed1n Ri = 1.5 mm. \u0110i\u1ec1u ki\u1ec7n R_punch \u2265 0.18 \u00d7 V.<br \/>\n  &#8211; Ch\u1ecdn V = 9 mm (\u2248 6\u00d7t). 0.18 \u00d7 V = 1.62 mm. D\u00f9ng ch\u00e0y R_punch = 2.0 mm \u2192 Ri \u2248 2.0 mm<br \/>\n  &#8211; N\u1ebfu b\u1eaft bu\u1ed9c Ri = 1.5 mm: gi\u1ea3m V c\u00f2n 8 mm (0.18 \u00d7 8 = 1.44 mm) v\u00e0 d\u00f9ng ch\u00e0y R_punch = 1.5 mm \u2192 Ri \u2248 1.5 mm.<br \/>\n&#8211; Gi\u1ea3 s\u1eed \u0111\u00e3 ch\u1ecdn V = 8 mm, R_punch = 1.5 mm \u2192 Ri = 1.5 mm; K = 0.45.<br \/>\n&#8211; BA = (\u03c0\/2) \u00d7 (Ri + K \u00d7 t) = 1.5708 \u00d7 (1.5 + 0.45 \u00d7 1.5)<br \/>\n  = 1.5708 \u00d7 (1.5 + 0.675) = 1.5708 \u00d7 2.175 \u2248 3.417 mm.<br \/>\n&#8211; SB = (Ri + t) \u00d7 tan(45\u00b0) = (1.5 + 1.5) \u00d7 1 = 3.0 mm.<br \/>\n&#8211; BD = 2 \u00d7 SB \u2212 BA = 6.0 \u2212 3.417 = 2.583 mm.<br \/>\n&#8211; FL = 40 + 30 \u2212 2.583 \u2248 67.42 mm.<\/p>\n<p>L\u01b0u \u00fd:<br \/>\n&#8211; V\u1edbi air bending, \u0111o ki\u1ec3m 1\u20132 m\u1eabu \u0111\u1ec3 hi\u1ec7u ch\u1ec9nh K-factor\/BA th\u1ef1c t\u1ebf theo v\u1eadt li\u1ec7u l\u00f4 h\u00e0ng.<br \/>\n&#8211; D\u00e1n film b\u1ea3o v\u1ec7 t\u0103ng hi\u1ec7u d\u1ee5ng t (t\u01b0\u01a1ng \u0111\u01b0\u01a1ng ~0.05\u20130.1 mm), c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng g\u00f3c\/BA.<\/p>\n<h2 id=\"toc-5-kiem-soat-hoi-xuan-springback-va-dat-goc-chinh-xac\">Ki\u1ec3m so\u00e1t h\u1ed3i xu\u00e2n (springback) v\u00e0 \u0111\u1ea1t g\u00f3c ch\u00ednh x\u00e1c<\/h2>\n<p>&#8211; M\u1ee9c h\u1ed3i xu\u00e2n \u0111i\u1ec3n h\u00ecnh:<br \/>\n  &#8211; Inox 304\/316 t \u2264 3 mm: 2\u20134\u00b0 (c\u00f3 th\u1ec3 \u0111\u1ebfn 5\u20136\u00b0 v\u1edbi Ri l\u1edbn\/V l\u1edbn)<br \/>\n  &#8211; Inox 201: 3\u20136\u00b0<br \/>\n  &#8211; Ferritic 430: 1\u20133\u00b0 (nh\u01b0ng d\u1ec5 n\u1ee9t khi Ri nh\u1ecf)<br \/>\n&#8211; Bi\u1ec7n ph\u00e1p gi\u1ea3m\/ki\u1ec3m so\u00e1t:<br \/>\n  &#8211; T\u1ed1i \u01b0u V\/R: V nh\u1ecf h\u01a1n \u2192 Ri nh\u1ecf h\u01a1n \u2192 \u00edt h\u1ed3i xu\u00e2n h\u01a1n (\u0111\u1ed5i l\u1ea1i l\u1ef1c cao).<br \/>\n  &#8211; Ch\u1ecdn bottoming khi c\u1ea7n l\u1eb7p l\u1ea1i g\u00f3c cao, h\u1ea1n ch\u1ebf b\u1ec1 m\u1eb7t h\u1eb1n b\u1eb1ng phim\/c\u1ed1i vai tr\u00f2n.<br \/>\n  &#8211; D\u00f9ng ch\u00e0y l\u1edbn R_punch \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n Ri \u1ed5n \u0111\u1ecbnh.<br \/>\n  &#8211; C\u00e0i \u0111\u1eb7t overbend: \u0111\u1eb7t g\u00f3c ch\u1ea5n nh\u1ecf h\u01a1n (v\u00ed d\u1ee5 87\u201388\u00b0) \u0111\u1ec3 sau h\u1ed3i xu\u00e2n \u0111\u1ea1t 90\u00b0; hi\u1ec7u ch\u1ec9nh d\u1ea7n theo m\u1eabu \u0111o.<br \/>\n  &#8211; D\u00f9ng m\u00e1y c\u00f3 c\u1ea3m bi\u1ebfn \u0111o g\u00f3c\/h\u1ec7 b\u00f9 h\u1ed3i xu\u00e2n, crowning t\u1ef1 \u0111\u1ed9ng cho chi ti\u1ebft d\u00e0i.<br \/>\n  &#8211; Qu\u1ea3n l\u00fd bi\u1ebfn c\u1ee9ng: tr\u00e1nh coining kh\u00f4ng c\u1ea7n thi\u1ebft; v\u1edbi nhi\u1ec1u b\u01b0\u1edbc ch\u1ea5n li\u00ean ti\u1ebfp tr\u00ean v\u00f9ng g\u1ea7n nhau, h\u1ed3i xu\u00e2n c\u1ed9ng d\u1ed3n.<\/p>\n<h2 id=\"toc-6-trinh-tu-chan-chieu-hat-can-va-gioi-han-mep-nho-nh\">Tr\u00ecnh t\u1ef1 ch\u1ea5n, chi\u1ec1u h\u1ea1t c\u00e1n v\u00e0 gi\u1edbi h\u1ea1n m\u00e9p nh\u1ecf nh\u1ea5t<\/h2>\n<p>&#8211; Chi\u1ec1u h\u1ea1t c\u00e1n (grain): \u01afu ti\u00ean ch\u1ea5n vu\u00f4ng g\u00f3c v\u1edbi chi\u1ec1u c\u00e1n \u0111\u1ec3 gi\u1ea3m n\u1ee9t ch\u00e2n g\u1ea5p, nh\u1ea5t l\u00e0 v\u1edbi Inox ferritic\/201 v\u00e0 khi Ri nh\u1ecf.<br \/>\n&#8211; M\u00e9p nh\u1ecf nh\u1ea5t (minimum flange):<br \/>\n  &#8211; Quy t\u1eafc an to\u00e0n cho air bending Inox: L_min \u2265 0.5 \u00d7 V + (1.0\u20132.0) \u00d7 t.<br \/>\n  &#8211; M\u00e9p qu\u00e1 ng\u1eafn d\u1ec5 l\u1ecdt c\u1ed1i, c\u00e1nh b\u1ecb \u201c\u0111\u1ed9i\u201d cong; n\u1ebfu b\u1eaft bu\u1ed9c, d\u00f9ng ch\u1eb7n chuy\u00ean d\u1ee5ng ho\u1eb7c c\u1ed1i d\u1ea1ng h\u1ed7 tr\u1ee3 m\u00e9p.<br \/>\n&#8211; Tr\u00ecnh t\u1ef1 ch\u1ea5n: Ch\u1ea5n c\u00e1c g\u00e2n\/t\u0103ng c\u1ee9ng tr\u01b0\u1edbc, r\u1ed3i \u0111\u1ebfn c\u00e1c c\u1ea1nh bao; \u01b0u ti\u00ean ch\u1ea5n t\u1eeb trong ra ngo\u00e0i \u0111\u1ec3 tr\u00e1nh va ch\u1ea1m; ki\u1ec3m tra va ch\u1ea1m 3D khi d\u00f9ng dao cao.<\/p>\n<h2 id=\"toc-7-bao-ve-be-mat-va-dung-sai\">B\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t v\u00e0 dung sai<\/h2>\n<p>&#8211; D\u00e1n film PE\/laser film tr\u01b0\u1edbc khi ch\u1ea5n; d\u00f9ng c\u1ed1i ph\u1ee7 urethane ho\u1eb7c l\u00f3t film r\u1eddi \u0111\u1ec3 tr\u00e1nh x\u01b0\u1edbc.<br \/>\n&#8211; Dung sai th\u1ef1c t\u1ebf kh\u1ea3 thi:<br \/>\n  &#8211; G\u00f3c: \u00b10.5\u00b0 (chi ti\u1ebft ng\u1eafn, c\u00f3 bottoming\/\u0111o g\u00f3c), \u00b11.0\u20131.5\u00b0 (chi ti\u1ebft d\u00e0i air bending).<br \/>\n  &#8211; K\u00edch th\u01b0\u1edbc c\u00e1nh: \u00b10.2\u20130.5 mm t\u00f9y d\u00e0i \u0111o\u1ea1n v\u00e0 s\u1ed1 b\u01b0\u1edbc ch\u1ea5n.<\/p>\n<h2 id=\"toc-8-loi-thuong-gap-va-cach-khac-phuc\">L\u1ed7i th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c<\/h2>\n<p>&#8211; N\u1ee9t ch\u00e2n g\u1ea5p: Ri qu\u00e1 nh\u1ecf, ch\u1ea5n theo chi\u1ec1u c\u00e1n, v\u1eadt li\u1ec7u gi\u00e3n d\u00e0i th\u1ea5p. Kh\u1eafc ph\u1ee5c: t\u0103ng Ri\/V, ch\u1ea5n vu\u00f4ng h\u1ea1t, \u1ee7 m\u1ec1m\/\u1ee7 c\u1ea1nh, thay c\u1ea5p Inox d\u1ec5 ch\u1ea5n h\u01a1n (304 thay 201\/430).<br \/>\n&#8211; G\u00f3c thi\u1ebfu (h\u1ed3i xu\u00e2n l\u1edbn): V qu\u00e1 l\u1edbn, R l\u1edbn, v\u1eadt li\u1ec7u c\u1ee9ng. Kh\u1eafc ph\u1ee5c: overbend th\u00eam, gi\u1ea3m V, d\u00f9ng bottoming.<br \/>\n&#8211; V\u1ebft h\u1eb1n\/x\u01b0\u1edbc: Vai c\u1ed1i s\u1eafc, l\u1ef1c l\u1edbn, kh\u00f4ng c\u00f3 film. Kh\u1eafc ph\u1ee5c: c\u1ed1i vai tr\u00f2n, ph\u1ee7\/film, t\u0103ng V, gi\u1ea3m \u00e1p su\u1ea5t gi\u1eef.<br \/>\n&#8211; C\u00e1nh ng\u1eafn\/sai k\u00edch: Kh\u00f4ng t\u00ednh \u0111\u00fang BA\/BD, K-factor sai. Kh\u1eafc ph\u1ee5c: hi\u1ec7u chu\u1ea9n K theo m\u1eabu, c\u1eadp nh\u1eadt b\u1ea3ng BA theo t\u1eebng v\u1eadt li\u1ec7u\/l\u00f4.<br \/>\n&#8211; L\u1ec7ch g\u00f3c theo chi\u1ec1u d\u00e0i: V\u00f5ng dao\/b\u00e0n m\u00e1y. Kh\u1eafc ph\u1ee5c: crowning, ph\u00e2n \u0111o\u1ea1n ch\u1ea5n ng\u1eafn, ki\u1ec3m so\u00e1t l\u1ef1c\/\u0111i\u1ec3m t\u1ef3.<\/p>\n<h2 id=\"toc-9-checklist-nhanh-truoc-khi-chan-inox\">Checklist nhanh tr\u01b0\u1edbc khi ch\u1ea5n Inox<\/h2>\n<p>&#8211; X\u00e1c \u0111\u1ecbnh v\u1eadt li\u1ec7u\/\u0111\u1ed9 b\u1ec1n (\u03c3UTS), chi\u1ec1u d\u00e0y, y\u00eau c\u1ea7u Ri, g\u00f3c, dung sai.<br \/>\n&#8211; Ch\u1ecdn V theo t v\u00e0 Ri; ki\u1ec3m tra l\u1ef1c ch\u1ea5n < c\u00f4ng su\u1ea5t m\u00e1y (c\u00f3 d\u1ef1 ph\u00f2ng).\n- Ch\u1ecdn ch\u00e0y theo g\u00f3c v\u00e0 R_punch \u0111\u1ec3 \u0111\u1ea1t Ri m\u1ee5c ti\u00eau.\n- T\u00ednh BA\/BD v\u1edbi K-factor kh\u1edfi t\u1ea1o (Inox 0.45), c\u1eaft m\u1eabu, \u0111o v\u00e0 hi\u1ec7u ch\u1ec9nh.\n- Thi\u1ebft l\u1eadp overbend ph\u00f9 h\u1ee3p, ki\u1ec3m tra h\u1ed3i xu\u00e2n tr\u00ean m\u1eabu.\n- B\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t b\u1eb1ng film v\u00e0\/ho\u1eb7c c\u1ed1i ph\u00f9 h\u1ee3p; ki\u1ec3m tra va ch\u1ea1m d\u1ee5ng c\u1ee5.\n- K\u00edch ho\u1ea1t crowning cho chi ti\u1ebft d\u00e0i; ki\u1ec3m tra dung sai sau 3\u20135 chi ti\u1ebft \u0111\u1ea7u.\n\n\n\n<h2 id=\"toc-10-vi-du-tong-hop-tu-chon-dung-cu-den-tinh-luc-va-goc\">V\u00ed d\u1ee5 t\u1ed5ng h\u1ee3p: t\u1eeb ch\u1ecdn d\u1ee5ng c\u1ee5 \u0111\u1ebfn t\u00ednh l\u1ef1c v\u00e0 g\u00f3c<\/h2>\n<p>B\u00e0i to\u00e1n: Inox 316 t = 3.0 mm; g\u00f3c 90\u00b0; y\u00eau c\u1ea7u Ri \u2248 2.0\u20132.5 mm; chi\u1ec1u d\u00e0i ch\u1ea5n L = 800 mm.<br \/>\n&#8211; Ch\u1ecdn V: Inox 3 mm \u2192 V \u2248 8\u201310 \u00d7 t \u2192 th\u1eed V = 24 mm (8\u00d7t).<br \/>\n&#8211; Ri \u01b0\u1edbc t\u00ednh theo V: 0.18 \u00d7 24 = 4.32 mm (qu\u00e1 l\u1edbn so v\u1edbi y\u00eau c\u1ea7u).<br \/>\n&#8211; Gi\u1ea3i ph\u00e1p: Gi\u1ea3m V xu\u1ed1ng 18 mm (\u2248 6\u00d7t). 0.18 \u00d7 18 = 3.24 mm; ch\u1ecdn ch\u00e0y R_punch = 2.5 mm (R_punch > 3.24? Kh\u00f4ng). \u0110\u1ec3 Ri \u2248 2.5 mm, c\u1ea7n 0.18 \u00d7 V \u2264 2.5 \u2192 V \u2264 13.9 mm. Ch\u1ecdn V = 12 mm, R_punch = 2.5 mm \u2192 Ri \u2248 2.5 mm.<br \/>\n&#8211; L\u1ef1c ch\u1ea5n: \u03c3UTS 316 \u2248 600 MPa<br \/>\n  &#8211; F (kN\/m) = 1.42 \u00d7 600 \u00d7 (3\u00b2)\/12 = 1.42 \u00d7 600 \u00d7 9 \/ 12 = 639 kN\/m<br \/>\n  &#8211; \u0110\u1ed5i t\u1ea5n\/m: 639\/9.81 \u2248 65.1 t\/m \u2192 cho L = 0.8 m: ~52.1 t<br \/>\n  &#8211; Ki\u1ec3m tra m\u00e1y \u2265 70 t (d\u1ef1 ph\u00f2ng ~35%) l\u00e0 an to\u00e0n h\u01a1n.<br \/>\n&#8211; H\u1ed3i xu\u00e2n d\u1ef1 ki\u1ebfn: 3\u20135\u00b0. C\u00e0i \u0111\u1eb7t overbend 86.5\u201387\u00b0; \u0111o v\u00e0 tinh ch\u1ec9nh.<br \/>\n&#8211; BA\/BD: K = 0.45 \u0111\u1ec3 t\u00ednh FL; c\u1eaft m\u1eabu v\u00e0 c\u1eadp nh\u1eadt K th\u1ef1c t\u1ebf n\u1ebfu c\u1ea7n.<\/p>\n<h2 id=\"toc-11-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/h2>\n<p>&#8211; WILA Tooling \u2013 Bending force calculation and die opening\/radius relations; guidance on Ri \u2248 0.16\u20130.2 \u00d7 V v\u00e0 F (kN\/m) \u2248 1.42 \u00d7 \u03c3UTS \u00d7 t\u00b2 \/ V.<br \/>\n&#8211; TRUMPF Bending Guidelines \u2013 Selection of V-die by thickness, springback control, crowning.<br \/>\n&#8211; The FABRICATOR (Steve Benson) \u2013 Air bending vs. bottoming vs. coining; K\u2011factor, BA\/BD \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf.<br \/>\n&#8211; Wilson Tool \u2013 Tooling selection, protective films and minimum flange recommendations.<br \/>\n&#8211; ASTM A240 \/ Datasheets t\u1eeb nh\u00e0 s\u1ea3n xu\u1ea5t th\u00e9p kh\u00f4ng g\u1ec9 \u2013 Thu\u1ed9c t\u00ednh c\u01a1 t\u00ednh \u0111i\u1ec3n h\u00ecnh c\u1ee7a 304\/316\/201\/430.<\/p>\n<h2 id=\"toc-12-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>Mu\u1ed1n ch\u1ea5n g\u1ea5p Inox \u0111\u1ea1t g\u00f3c ch\u00ednh x\u00e1c v\u00e0 b\u1ec1 m\u1eb7t \u0111\u1eb9p, ph\u1ea3i b\u1eaft \u0111\u1ea7u t\u1eeb hai quy\u1ebft \u0111\u1ecbnh \u0111\u00fang: ch\u1ecdn V-die\/ch\u00e0y theo t v\u00e0 Ri m\u1ee5c ti\u00eau, v\u00e0 t\u00ednh to\u00e1n l\u1ef1c, BA\/BD ch\u00ednh x\u00e1c cho v\u1eadt li\u1ec7u c\u1ee5 th\u1ec3. Quy t\u1eafc th\u1ef1c d\u1ee5ng l\u00e0: V \u2248 6\u201310 \u00d7 t cho Inox; Ri theo 0.18 \u00d7 V ho\u1eb7c theo R_punch n\u1ebfu l\u1edbn h\u01a1n; K-factor kh\u1edfi t\u1ea1o 0.45; b\u00f9 h\u1ed3i xu\u00e2n 2\u20135\u00b0 v\u00e0 hi\u1ec7u ch\u1ec9nh theo m\u1eabu. Lu\u00f4n ki\u1ec3m tra l\u1ef1c so v\u1edbi c\u00f4ng su\u1ea5t m\u00e1y (k\u00e8m d\u1ef1 ph\u00f2ng), d\u00f9ng crowning cho chi ti\u1ebft d\u00e0i v\u00e0 b\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t b\u1eb1ng film\/c\u1ed1i ph\u00f9 h\u1ee3p. Th\u1ef1c hi\u1ec7n \u0111\u00fang c\u00e1c b\u01b0\u1edbc tr\u00ean, b\u1ea1n s\u1ebd ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c g\u00f3c, k\u00edch th\u01b0\u1edbc v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t ngay t\u1eeb lo\u1ea1t \u0111\u1ea7u ti\u00ean, gi\u1ea3m ph\u1ebf ph\u1ea9m v\u00e0 th\u1eddi gian ch\u1ec9nh m\u00e1y.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n ch\u1ecdn dao\u2013c\u1ed1i chu\u1ea9n v\u00e0 b\u00e1o gi\u00e1 Inox\/dao c\u1ed1i ch\u1ea5t l\u01b0\u1ee3ng t\u1ea1i H\u00e0 N\u1ed9i? Li\u00ean h\u1ec7 Inox C\u01b0\u1eddng Th\u1ecbnh \u0111\u1ec3 \u0111\u01b0\u1ee3c k\u1ef9 s\u01b0 h\u1ed7 tr\u1ee3 v\u00e0 t\u1ed1i \u01b0u chi ph\u00ed: Hotline 0343.417.281 \u2013 Email inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn ch\u1ecdn dao, c\u1ed1i, t\u00ednh l\u1ef1c v\u00e0 g\u00f3c ch\u1ea5n cho Inox t\u1ea5m. C\u00f4ng th\u1ee9c BA\/BD, K-factor, ch\u1ecdn V-die, b\u00f9 h\u1ed3i xu\u00e2n v\u00e0 v\u00ed d\u1ee5 t\u00ednh th\u1ef1c t\u1ebf.<\/p>\n","protected":false},"author":7,"featured_media":1029,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1822","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\/1822","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=1822"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1822\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1029"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1822"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1822"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1822"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}