{"id":1223,"date":"2025-10-25T00:33:55","date_gmt":"2025-10-24T17:33:55","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/uon-ong-hop-inox-khong-mop-chuan-r-d-chon-mandrel-quy-trinh\/"},"modified":"2025-10-25T00:33:55","modified_gmt":"2025-10-24T17:33:55","slug":"uon-ong-hop-inox-khong-mop-chuan-r-d-chon-mandrel-quy-trinh","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/uon-ong-hop-inox-khong-mop-chuan-r-d-chon-mandrel-quy-trinh\/","title":{"rendered":"U\u1ed1n \u1ed1ng, h\u1ed9p Inox kh\u00f4ng m\u00f3p: chu\u1ea9n R\/D, ch\u1ecdn mandrel, quy tr\u00ecnh"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-hieu-vat-lieu-inox-va-rui-ro-khi-uon\">Hi\u1ec3u v\u1eadt li\u1ec7u Inox v\u00e0 r\u1ee7i ro khi u\u1ed1n<\/a><\/li>\n<li><a href=\"#toc-1-chon-phuong-phap-uon-theo-ban-kinh-va-do-day\">Ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p u\u1ed1n theo b\u00e1n k\u00ednh v\u00e0 \u0111\u1ed9 d\u00e0y<\/a><\/li>\n<li><a href=\"#toc-2-thiet-ke-ban-kinh-uon-va-tieu-chi-bien-dang\">Thi\u1ebft k\u1ebf b\u00e1n k\u00ednh u\u1ed1n v\u00e0 ti\u00eau ch\u00ed bi\u1ebfn d\u1ea1ng<\/a><\/li>\n<li><a href=\"#toc-3-cau-hinh-do-ga-mandrel-wiper-khuon-va-boi-tron\">C\u1ea5u h\u00ecnh \u0111\u1ed3 g\u00e1: mandrel, wiper, khu\u00f4n v\u00e0 b\u00f4i tr\u01a1n<\/a><\/li>\n<li><a href=\"#toc-4-thong-so-may-va-bu-goc-cho-inox\">Th\u00f4ng s\u1ed1 m\u00e1y v\u00e0 b\u00f9 g\u00f3c cho Inox<\/a><\/li>\n<li><a href=\"#toc-5-uon-hop-inox-luu-y-rieng\">U\u1ed1n h\u1ed9p Inox: l\u01b0u \u00fd ri\u00eang<\/a><\/li>\n<li><a href=\"#toc-6-quy-trinh-10-buoc-uon-khong-mop-danh-cho-xuong\">Quy tr\u00ecnh 10 b\u01b0\u1edbc u\u1ed1n kh\u00f4ng m\u00f3p d\u00e0nh cho x\u01b0\u1edfng<\/a><\/li>\n<li><a href=\"#toc-7-meo-thuc-te-cho-xuong-vua-va-nho\">M\u1eb9o th\u1ef1c t\u1ebf cho x\u01b0\u1edfng v\u1eeba v\u00e0 nh\u1ecf<\/a><\/li>\n<li><a href=\"#toc-8-khac-phuc-loi-thuong-gap\">Kh\u1eafc ph\u1ee5c l\u1ed7i th\u01b0\u1eddng g\u1eb7p<\/a><\/li>\n<li><a href=\"#toc-9-kiem-soat-chat-luong-sau-uon\">Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng sau u\u1ed1n<\/a><\/li>\n<li><a href=\"#toc-10-tham-chieu-nhanh-goi-y-r-toi-thieu-voi-uon-co-mand\">Tham chi\u1ebfu nhanh (g\u1ee3i \u00fd R t\u1ed1i thi\u1ec3u v\u1edbi u\u1ed1n c\u00f3 mandrel)<\/a><\/li>\n<li><a href=\"#toc-11-bang-bu-goc-tham-khao\">B\u1ea3ng b\u00f9 g\u00f3c tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-12-an-toan-va-hoan-thien-be-mat\">An to\u00e0n v\u00e0 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t<\/a><\/li>\n<li><a href=\"#toc-13-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>U\u1ed1n \u1ed1ng v\u00e0 h\u1ed9p Inox m\u00e0 kh\u00f4ng b\u1ecb m\u00f3p, d\u1eb9t hay nh\u0103n l\u00e0 y\u00eau c\u1ea7u c\u1ed1t l\u00f5i trong ch\u1ebf t\u1ea1o k\u1ebft c\u1ea5u, lan can, khung m\u00e1y, \u0111\u01b0\u1eddng \u1ed1ng. B\u00e0i vi\u1ebft n\u00e0y h\u1ec7 th\u1ed1ng k\u1ef9 thu\u1eadt, th\u00f4ng s\u1ed1 v\u00e0 quy tr\u00ecnh th\u1ef1c t\u1ebf \u0111\u1ec3 u\u1ed1n s\u1ea1ch, \u0111\u00fang b\u00e1n k\u00ednh, ki\u1ec3m so\u00e1t bi\u1ebfn d\u1ea1ng cho c\u00e1c m\u00e1c Inox th\u00f4ng d\u1ee5ng (201\/304\/316). Ch\u1ee7 \u0111\u1ec1 thu\u1ed9c c\u1ea9m nang \u1ed1ng\/h\u1ed9p Inox nh\u01b0ng b\u00e0i vi\u1ebft n\u00e0y 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-hieu-vat-lieu-inox-va-rui-ro-khi-uon\">Hi\u1ec3u v\u1eadt li\u1ec7u Inox v\u00e0 r\u1ee7i ro khi u\u1ed1n<\/h2>\n<p>&#8211; M\u00e1c v\u1eadt li\u1ec7u: 201 (\u0111\u1ed9 ch\u1ea3y cao, d\u1ec5 \u0111\u00e0n h\u1ed3i h\u1ed3i), 304 (d\u1ec5 u\u1ed1n nh\u1ea5t trong nh\u00f3m austenit), 316 (d\u1ebbo, nh\u01b0ng work-hardening m\u1ea1nh). \u1ed0ng c\u01a1 kh\u00ed trang tr\u00ed th\u01b0\u1eddng theo ASTM A554; \u1ed1ng c\u00f4ng nghi\u1ec7p theo ASTM A312.<br \/>\n&#8211; \u0110\u1eb7c t\u00ednh \u1ea3nh h\u01b0\u1edfng u\u1ed1n:<br \/>\n  &#8211; \u0110\u00e0n h\u1ed3i h\u1ed3i (springback) c\u1ee7a austenit cao h\u01a1n th\u00e9p carbon \u2192 c\u1ea7n b\u00f9 g\u00f3c u\u1ed1n.<br \/>\n  &#8211; Work-hardening: v\u00f9ng u\u1ed1n c\u1ee9ng nhanh, n\u1ebfu u\u1ed1n n\u00f3ng c\u1ea7n x\u1eed l\u00fd t\u1ea9y g\u1ec9\/passivation \u0111\u1ec3 ph\u1ee5c h\u1ed3i ch\u1ed1ng \u0103n m\u00f2n b\u1ec1 m\u1eb7t.<br \/>\n  &#8211; \u0110\u01b0\u1eddng h\u00e0n d\u1ecdc: n\u00ean \u0111\u1eb7t \u1edf m\u1eb7t trung h\u00f2a ho\u1eb7c ph\u00eda ngo\u00e0i \u0111\u1ec3 gi\u1ea3m nh\u0103n \u1edf l\u00f2ng trong.<br \/>\n&#8211; Thu\u1eadt ng\u1eef bi\u1ebfn d\u1ea1ng:<br \/>\n  &#8211; D\u1eb9t\/\u0111\u1ed9 oval (ovality): \u0111\u1ed9 tr\u00f2n suy gi\u1ea3m, t\u00ednh theo [(ODmax \u2212 ODmin)\/ODnom] \u00d7 100%.<br \/>\n  &#8211; Nh\u0103n (wrinkling) \u1edf l\u00f2ng trong; m\u1ecfng th\u00e0nh ph\u00eda ngo\u00e0i; l\u00f5m m\u1eb7t ph\u1eb3ng v\u1edbi h\u1ed9p (concavity).<br \/>\n  &#8211; Xo\u1eafn (twist) ti\u1ebft di\u1ec7n khi \u0111\u1ed3 g\u00e1\/\u0111\u1ea9y b\u00f9 kh\u00f4ng ph\u00f9 h\u1ee3p.<\/p>\n<h2 id=\"toc-1-chon-phuong-phap-uon-theo-ban-kinh-va-do-day\">Ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p u\u1ed1n theo b\u00e1n k\u00ednh v\u00e0 \u0111\u1ed9 d\u00e0y<\/h2>\n<p>&#8211; U\u1ed1n k\u00e9o xoay (Rotary Draw Bending) c\u00f3 mandrel: chu\u1ea9n cho b\u00e1n k\u00ednh nh\u1ecf R = 1\u20133D (D = \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i\/chi\u1ec1u r\u1ed9ng h\u1ed9p). D\u00f9ng b\u1ed9 khu\u00f4n: bend die (R\/CLR), clamp die, pressure die, wiper die, mandrel trong \u1ed1ng.<br \/>\n&#8211; U\u1ed1n l\u1ed1c 3 tr\u1ee5c (Roll Bending): cho R l\u1edbn, th\u01b0\u1eddng R > 10D, bi\u1ebfn d\u1ea1ng \u0111\u1ec1u, \u00edt d\u1eb9t.<br \/>\n&#8211; U\u1ed1n \u00e9p (Press Bending): nhanh, chi ph\u00ed th\u1ea5p, nh\u01b0ng d\u1ec5 d\u1eb9t\/nh\u0103n; ch\u1ec9 n\u00ean d\u00f9ng khi R \u2265 3D v\u00e0 t\/D \u0111\u1ee7 l\u1edbn.<br \/>\n&#8211; U\u1ed1n n\u00f3ng: ch\u1ec9 d\u00f9ng khi b\u1eaft bu\u1ed9c (ti\u1ebft di\u1ec7n l\u1edbn, R r\u1ea5t nh\u1ecf). C\u1ea7n ki\u1ec3m so\u00e1t nhi\u1ec7t v\u00e0 x\u1eed l\u00fd t\u1ea9y g\u1ec9\/passivation sau u\u1ed1n; kh\u00f4ng khuy\u1ebfn ngh\u1ecb v\u1edbi b\u1ec1 m\u1eb7t trang tr\u00ed BA\/HL.<\/p>\n<h2 id=\"toc-2-thiet-ke-ban-kinh-uon-va-tieu-chi-bien-dang\">Thi\u1ebft k\u1ebf b\u00e1n k\u00ednh u\u1ed1n v\u00e0 ti\u00eau ch\u00ed bi\u1ebfn d\u1ea1ng<\/h2>\n<h3>Quy t\u1eafc th\u1ef1c d\u1ee5ng theo t\/D (th\u00e0nh\/\u0111\u01b0\u1eddng k\u00ednh ho\u1eb7c th\u00e0nh\/chi\u1ec1u r\u1ed9ng)<\/h3>\n<p>&#8211; t\/D \u2265 0.10: c\u00f3 th\u1ec3 R \u2248 1.5\u20132.0D v\u1edbi mandrel; kh\u00f4ng mandrel n\u00ean R \u2265 2.5D.<br \/>\n&#8211; 0.06 \u2264 t\/D < 0.10: n\u00ean R \u2265 2.0\u20133.0D v\u00e0 b\u1eaft bu\u1ed9c mandrel + wiper die cho b\u1ec1 m\u1eb7t \u0111\u1eb9p.\n- t\/D < 0.06 (th\u00e0nh m\u1ecfng, v\u00ed d\u1ee5 1.0 mm v\u1edbi \u00d838.1): \u01b0u ti\u00ean R \u2265 3.0\u20134.0D, lu\u00f4n d\u00f9ng mandrel bi.\n- V\u1edbi h\u1ed9p ch\u1eef nh\u1eadt: R t\u00e2m u\u1ed1n (CLR) t\u1ed1i thi\u1ec3u th\u01b0\u1eddng \u2265 2.5\u20133.0 l\u1ea7n c\u1ea1nh l\u1edbn n\u1ebfu t \u2264 1.2 mm; t\u0103ng l\u00ean 3.5\u20134.0 l\u1ea7n khi t \u2264 0.8 mm.\n\n\n\n<h3>Gi\u1edbi h\u1ea1n ch\u1ea5t l\u01b0\u1ee3ng khuy\u1ebfn ngh\u1ecb<\/h3>\n<p>&#8211; \u0110\u1ed9 oval \u1ed1ng tr\u00f2n: \u2264 7% v\u1edbi h\u1ea1ng m\u1ee5c trang tr\u00ed, \u2264 10% v\u1edbi k\u1ebft c\u1ea5u th\u00f4ng th\u01b0\u1eddng.<br \/>\n&#8211; M\u1ecfng th\u00e0nh ph\u00eda ngo\u00e0i: \u2264 12% so v\u1edbi t ban \u0111\u1ea7u v\u1edbi 201\/304\/316.<br \/>\n&#8211; H\u1ed9p: \u0111\u1ed9 l\u00f5m b\u1ec1 m\u1eb7t (concavity) \u2264 1\u20132% c\u1ea1nh; bo g\u00f3c ngo\u00e0i kh\u00f4ng r\u1ea1n n\u1ee9t.<\/p>\n<h2 id=\"toc-3-cau-hinh-do-ga-mandrel-wiper-khuon-va-boi-tron\">C\u1ea5u h\u00ecnh \u0111\u1ed3 g\u00e1: mandrel, wiper, khu\u00f4n v\u00e0 b\u00f4i tr\u01a1n<\/h2>\n<p>&#8211; Mandrel (ru\u1ed9t trong \u1ed1ng):<br \/>\n  &#8211; Lo\u1ea1i: plug (n\u00fat), form, bi \u0111o\u1ea1n (ball mandrel). Th\u00e0nh m\u1ecfng v\u00e0 R nh\u1ecf \u2192 d\u00f9ng ball mandrel 3\u20135 bi.<br \/>\n  &#8211; V\u1ecb tr\u00ed: \u0111\u1ea7u bi \u0111\u1ea7u ti\u00ean nh\u00f4 0.5\u20131.0 mm qua m\u1eb7t ti\u1ebfp tuy\u1ebfn u\u1ed1n (tangent). L\u00f9i qu\u00e1 g\u00e2y nh\u0103n, ti\u1ebfn qu\u00e1 g\u00e2y x\u01b0\u1edbc.<br \/>\n&#8211; Wiper die (dao g\u1ea1t n\u1ebfp): \u0111\u1eb7t ngay tr\u01b0\u1edbc m\u1eb7t ti\u1ebfp tuy\u1ebfn \u1edf l\u00f2ng trong; g\u00f3c c\u00e0o 15\u201330\u00b0, l\u01b0\u1ee1i m\u1ea3nh, b\u00f4i tr\u01a1n t\u1ed1t \u0111\u1ec3 tri\u1ec7t nh\u0103n.<br \/>\n&#8211; Pressure die boost (\u0111\u1ea9y b\u00f9): \u0111\u1ea9y nh\u1eb9 v\u1eadt li\u1ec7u v\u1ec1 v\u00f9ng k\u00e9o ngo\u00e0i, gi\u1ea3m m\u1ecfng v\u00e0 d\u1eb9t. \u0110i\u1ec3m kh\u1edfi \u0111\u1ea7u: 2\u20136% l\u1ef1c \u0111\u1ea9y; t\u0103ng d\u1ea7n t\u1edbi khi d\u1eb9t\/nh\u0103n t\u1ed1i thi\u1ec3u m\u00e0 kh\u00f4ng xo\u1eafn.<br \/>\n&#8211; Clamp length (chi\u1ec1u d\u00e0i k\u1eb9p): t\u1ed1i thi\u1ec3u 3\u00d7D v\u1edbi \u1ed1ng tr\u00f2n; v\u1edbi h\u1ed9p \u2265 2.5\u00d7 c\u1ea1nh l\u1edbn \u0111\u1ec3 tr\u00e1nh tr\u01b0\u1ee3t.<br \/>\n&#8211; V\u1eadt li\u1ec7u\/kho ph\u1ee7 khu\u00f4n: t\u00f4i b\u1ec1 m\u1eb7t, ph\u1ee7 crom c\u1ee9ng\/nitride \u0111\u1ec3 ch\u1ed1ng d\u00ednh v\u00e0 c\u00e0o x\u01b0\u1edbc Inox; d\u00f9ng l\u00f3t nh\u1ef1a\/PU cho b\u1ec1 m\u1eb7t trang tr\u00ed.<br \/>\n&#8211; D\u1ea7u b\u00f4i tr\u01a1n: g\u1ed1c x\u00e0 ph\u00f2ng t\u1ed5ng h\u1ee3p\/PTFE\/graphite; kh\u00f4ng d\u00f9ng m\u1ee1 g\u00e2y \u1ed1 \u0111\u1ed1i v\u1edbi h\u1ea1ng m\u1ee5c n\u1ed9i th\u1ea5t ch\u01b0a t\u1ea9y r\u1eeda.<\/p>\n<h2 id=\"toc-4-thong-so-may-va-bu-goc-cho-inox\">Th\u00f4ng s\u1ed1 m\u00e1y v\u00e0 b\u00f9 g\u00f3c cho Inox<\/h2>\n<p>&#8211; T\u1ed1c \u0111\u1ed9 u\u1ed1n: ch\u1eadm v\u1eeba (10\u201340\u00b0\/s) cho th\u00e0nh m\u1ecfng; qu\u00e1 nhanh d\u1ec5 nh\u0103n\/d\u1eb9t, qu\u00e1 ch\u1eadm t\u0103ng v\u1ebft c\u00e0o.<br \/>\n&#8211; B\u00f9 g\u00f3c \u0111\u00e0n h\u1ed3i h\u1ed3i:<br \/>\n  &#8211; Inox 304\/316: th\u01b0\u1eddng +2\u20135\u00b0 so v\u1edbi g\u00f3c m\u1ee5c ti\u00eau, t\u0103ng khi R l\u1edbn.<br \/>\n  &#8211; Inox 201: c\u00f3 th\u1ec3 +3\u20136\u00b0 do gi\u1edbi h\u1ea1n ch\u1ea3y cao h\u01a1n.<br \/>\n&#8211; Ki\u1ec3m so\u00e1t xo\u1eafn: canh \u0111\u01b0\u1eddng h\u00e0n theo d\u1ea5u chu\u1ea9n; d\u00f9ng d\u1eabn h\u01b0\u1edbng ch\u1ed1ng xo\u1eafn; \u0111i\u1ec1u ch\u1ec9nh song song clamp\/pressure die.<\/p>\n<h2 id=\"toc-5-uon-hop-inox-luu-y-rieng\">U\u1ed1n h\u1ed9p Inox: l\u01b0u \u00fd ri\u00eang<\/h2>\n<p>&#8211; H\u01b0\u1edbng u\u1ed1n: v\u1edbi h\u1ed9p ch\u1eef nh\u1eadt, u\u1ed1n theo c\u1ea1nh nh\u1ecf (weak axis) d\u1ec5 h\u01a1n; u\u1ed1n theo c\u1ea1nh l\u1edbn c\u1ea7n R l\u1edbn h\u01a1n v\u00e0 h\u1ed7 tr\u1ee3 trong l\u00f2ng h\u1ed9p.<br \/>\n&#8211; Mandrel h\u1ed9p: d\u00f9ng mandrel d\u1ea1ng kh\u1ed1i ho\u1eb7c bi h\u00ecnh ch\u1eef nh\u1eadt \u0111\u1ec3 ch\u1ed1ng l\u00f5m m\u1eb7t ph\u1eb3ng; c\u00f3 th\u1ec3 th\u00eam \u201canti-collapse insert\u201d t\u1ea1i g\u00f3c.<br \/>\n&#8211; G\u00f3c bo trong: t\u1ed1i thi\u1ec3u \u2248 1.5\u00d7t \u0111\u1ec3 tr\u00e1nh n\u1ee9t g\u00f3c ngo\u00e0i; n\u1ebfu y\u00eau c\u1ea7u bo s\u1eafc, xem x\u00e9t c\u00e1n\/\u00e9p l\u1ea1i sau u\u1ed1n v\u1edbi g\u00e1 \u0111\u1ee1 trong.<br \/>\n&#8211; Gi\u1ea3m l\u00f5m m\u1eb7t: t\u0103ng boost, d\u00f9ng wiper, t\u0103ng R, ho\u1eb7c d\u00f9ng con l\u0103n \u00e9p m\u1eb7t sau u\u1ed1n (calibrating roll).<\/p>\n<h2 id=\"toc-6-quy-trinh-10-buoc-uon-khong-mop-danh-cho-xuong\">Quy tr\u00ecnh 10 b\u01b0\u1edbc u\u1ed1n kh\u00f4ng m\u00f3p d\u00e0nh cho x\u01b0\u1edfng<\/h2>\n<p>1) X\u00e1c \u0111\u1ecbnh ti\u00eau ch\u00ed: R\/CLR, g\u00f3c u\u1ed1n, dung sai, gi\u1edbi h\u1ea1n ovality\/m\u1ecfng th\u00e0nh, b\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n.<br \/>\n2) Ch\u1ecdn v\u1eadt li\u1ec7u: 201\/304\/316 \u0111\u00fang ti\u00eau chu\u1ea9n; ki\u1ec3m tra t, OD\/size v\u00e0 v\u1ecb tr\u00ed \u0111\u01b0\u1eddng h\u00e0n.<br \/>\n3) Chu\u1ea9n b\u1ecb ph\u00f4i: c\u1eaft \u0111\u00fang k\u00edch; t\u1ec9a ba via; l\u00e0m s\u1ea1ch d\u1ea7u; d\u00e1n phim b\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t.<br \/>\n4) Ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p v\u00e0 b\u1ed9 khu\u00f4n: R m\u1ee5c ti\u00eau, set bend die, clamp\/pressure die t\u01b0\u01a1ng \u1ee9ng, wiper v\u00e0 lo\u1ea1i mandrel.<br \/>\n5) B\u00f4i tr\u01a1n: ph\u1ee7 \u0111\u1ec1u l\u00f2ng trong (v\u1ecb tr\u00ed mandrel) v\u00e0 b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac khu\u00f4n.<br \/>\n6) Canh seam\/weld: \u0111\u1eb7t \u1edf trung h\u00f2a ho\u1eb7c ph\u00eda ngo\u00e0i cung u\u1ed1n; \u0111\u00e1nh d\u1ea5u th\u01b0\u1edbc \u0111o v\u00e0 m\u1ed1c GOG (start of bend).<br \/>\n7) Thi\u1ebft l\u1eadp m\u00e1y: t\u1ed1c \u0111\u1ed9, boost 2\u20136% ban \u0111\u1ea7u, v\u1ecb tr\u00ed mandrel nh\u00f4 0.5\u20131.0 mm, l\u1ef1c k\u1eb9p \u0111\u1ee7 kh\u00f4ng tr\u01b0\u1ee3t.<br \/>\n8) U\u1ed1n th\u1eed: b\u00f9 g\u00f3c +3\u20135\u00b0; \u0111o R th\u1ef1c, g\u00f3c, ovality, m\u1ecfng th\u00e0nh, ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t.<br \/>\n9) T\u1ed1i \u01b0u: t\u0103ng\/gi\u1ea3m boost, ch\u1ec9nh wiper\/mandrel, thay \u0111\u1ed5i t\u1ed1c \u0111\u1ed9; n\u1ebfu v\u1eabn d\u1eb9t \u2192 t\u0103ng R ho\u1eb7c \u0111\u1ed5i lo\u1ea1i mandrel.<br \/>\n10) Ho\u00e0n thi\u1ec7n: r\u1eeda s\u1ea1ch d\u1ea7u, x\u1eed l\u00fd t\u1ea9y g\u1ec9\/passivation n\u1ebfu c\u00f3 u\u1ed1n n\u00f3ng ho\u1eb7c tr\u1ea7y x\u01b0\u1edbc; ki\u1ec3m tra cu\u1ed1i theo ti\u00eau ch\u00ed.<\/p>\n<h2 id=\"toc-7-meo-thuc-te-cho-xuong-vua-va-nho\">M\u1eb9o th\u1ef1c t\u1ebf cho x\u01b0\u1edfng v\u1eeba v\u00e0 nh\u1ecf<\/h2>\n<p>&#8211; Kh\u00f4ng c\u00f3 mandrel bender: \u01b0u ti\u00ean R \u2265 3\u20134D; d\u00f9ng l\u1ed1c 3 tr\u1ee5c cho bi\u00ean d\u1ea1ng l\u1edbn.<br \/>\n&#8211; H\u1ed7 tr\u1ee3 t\u1ea1m: n\u1ea1p c\u00e1t m\u1ecbn kh\u00f4\/nh\u1ef1a nhi\u1ec7t th\u1ea5p v\u00e0o \u1ed1ng, b\u1ecbt k\u00edn \u0111\u1ec3 h\u1ed7 tr\u1ee3 l\u00f2ng trong khi u\u1ed1n tay; l\u01b0u \u00fd l\u00e0m s\u1ea1ch ho\u00e0n to\u00e0n sau u\u1ed1n.<br \/>\n&#8211; Tr\u00e1nh u\u1ed1n n\u00f3ng \u0111\u1ed1i v\u1edbi b\u1ec1 m\u1eb7t trang tr\u00ed (BA\/HL\/No.4) v\u00ec \u0111\u1ed5i m\u00e0u\/oxy h\u00f3a; n\u1ebfu bu\u1ed9c u\u1ed1n n\u00f3ng, ph\u1ea3i pickling + passivation.<br \/>\n&#8211; B\u1ec1 m\u1eb7t \u0111\u1eb9p: d\u00f9ng l\u00f3t PU tr\u00ean khu\u00f4n k\u1eb9p, lu\u00f4n gi\u1eef phim PVC, lau s\u1ea1ch h\u1ea1t c\u1ee9ng tr\u01b0\u1edbc khi u\u1ed1n.<\/p>\n<h2 id=\"toc-8-khac-phuc-loi-thuong-gap\">Kh\u1eafc ph\u1ee5c l\u1ed7i th\u01b0\u1eddng g\u1eb7p<\/h2>\n<p>&#8211; Nh\u0103n l\u00f2ng trong: ti\u1ebfn mandrel 0.2\u20130.5 mm; t\u0103ng \u00e1p wiper; t\u0103ng boost nh\u1eb9; gi\u1ea3m t\u1ed1c; t\u0103ng R n\u1ebfu c\u1ea7n.<br \/>\n&#8211; D\u1eb9t\/oval cao: t\u0103ng R; t\u0103ng boost; d\u00f9ng mandrel bi nhi\u1ec1u \u0111o\u1ea1n; gi\u1ea3m t\u1ed1c; ch\u1ecdn \u1ed1ng t l\u1edbn h\u01a1n.<br \/>\n&#8211; N\u1ee9t m\u1eb7t ngo\u00e0i: gi\u1ea3m g\u00f3c\/ t\u0103ng R; \u0111\u1ed5i v\u1eadt li\u1ec7u (304 thay 201); ki\u1ec3m tra ba via\/s\u01b0\u1edbc; \u0111\u1ea3m b\u1ea3o bo trong \u2265 1.5\u00d7t v\u1edbi h\u1ed9p.<br \/>\n&#8211; Xo\u1eafn ti\u1ebft di\u1ec7n: c\u00e2n ch\u1ec9nh clamp\/pressure; t\u0103ng l\u1ef1c k\u1eb9p; canh l\u1ea1i seam; th\u00eam d\u1eabn h\u01b0\u1edbng.<br \/>\n&#8211; C\u00e0o x\u01b0\u1edbc\/galling: \u0111\u1ed5i v\u1eadt li\u1ec7u khu\u00f4n ph\u1ee7 c\u1ee9ng; t\u0103ng b\u00f4i tr\u01a1n; gi\u1ea3m \u00e1p k\u1eb9p; d\u00f9ng l\u00f3t m\u1ec1m.<\/p>\n<h2 id=\"toc-9-kiem-soat-chat-luong-sau-uon\">Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng sau u\u1ed1n<\/h2>\n<p>&#8211; \u0110o g\u00f3c v\u00e0 b\u00e1n k\u00ednh t\u00e2m u\u1ed1n (CLR) b\u1eb1ng d\u01b0\u1ee1ng ho\u1eb7c CMM c\u1ea7m tay; b\u00f9 g\u00f3c n\u1ebfu thi\u1ebfu.<br \/>\n&#8211; \u0110o ovality: d\u00f9ng th\u01b0\u1edbc c\u1eb7p\/\u0111\u1ed3ng h\u1ed3 so t\u1ea1i cung u\u1ed1n; m\u1ee5c ti\u00eau \u2264 7\u201310% theo y\u00eau c\u1ea7u.<br \/>\n&#8211; Ki\u1ec3m tra m\u1ecfng th\u00e0nh: \u0111o si\u00eau \u00e2m ho\u1eb7c c\u1eaft m\u1eabu; m\u1ee5c ti\u00eau \u2264 12%.<br \/>\n&#8211; Quan s\u00e1t b\u1ec1 m\u1eb7t: kh\u00f4ng r\u1ea1n n\u1ee9t, kh\u00f4ng v\u1ebft c\u00e0o s\u00e2u; \u0111\u01b0\u1eddng h\u00e0n nguy\u00ean v\u1eb9n; v\u1edbi \u1ed1ng \u00e1p l\u1ef1c c\u00f3 th\u1ec3 th\u1eed k\u00edn\/hydrotset theo y\u00eau c\u1ea7u.<\/p>\n<h2 id=\"toc-10-tham-chieu-nhanh-goi-y-r-toi-thieu-voi-uon-co-mand\">Tham chi\u1ebfu nhanh (g\u1ee3i \u00fd R t\u1ed1i thi\u1ec3u v\u1edbi u\u1ed1n c\u00f3 mandrel)<\/h2>\n<p>&#8211; \u1ed0ng \u00d819.05 \u00d7 1.0 mm (304): R khuy\u1ebfn ngh\u1ecb \u2265 45\u201360 mm (\u2248 2.5\u20133.0D).<br \/>\n&#8211; \u1ed0ng \u00d825.4 \u00d7 1.2 mm (304\/316): R \u2265 60\u201375 mm (\u2248 2.4\u20133.0D).<br \/>\n&#8211; \u1ed0ng \u00d838.1 \u00d7 1.2 mm (201): R \u2265 110\u2013130 mm (\u2248 2.9\u20133.4D, b\u00f9 do 201 \u0111\u00e0n h\u1ed3i h\u1ed3i l\u1edbn).<br \/>\n&#8211; H\u1ed9p 20\u00d720 \u00d7 1.0 mm (304): R \u2265 50\u201360 mm (\u2248 2.5\u20133.0D).<br \/>\n&#8211; H\u1ed9p 40\u00d720 \u00d7 1.2 mm (304): R \u2265 70\u201390 mm; \u01b0u ti\u00ean mandrel ch\u1eef nh\u1eadt \u0111\u1ec3 gi\u1ea3m l\u00f5m m\u1eb7t.<br \/>\nGhi ch\u00fa: Gi\u00e1 tr\u1ecb mang t\u00ednh th\u1ef1c h\u00e0nh; \u0111i\u1ec1u ch\u1ec9nh theo t\/D th\u1ef1c t\u1ebf, b\u1ec1 m\u1eb7t y\u00eau c\u1ea7u v\u00e0 n\u0103ng l\u1ef1c m\u00e1y\/khu\u00f4n.<\/p>\n<h2 id=\"toc-11-bang-bu-goc-tham-khao\">B\u1ea3ng b\u00f9 g\u00f3c tham kh\u1ea3o<\/h2>\n<p>&#8211; 304: +2\u20134\u00b0 (R nh\u1ecf) \u0111\u1ebfn +4\u20135\u00b0 (R l\u1edbn).<br \/>\n&#8211; 316: +2\u20135\u00b0.<br \/>\n&#8211; 201: +3\u20136\u00b0.<br \/>\nLu\u00f4n u\u1ed1n th\u1eed v\u00e0 hi\u1ec7u ch\u1ec9nh theo t\u1eebng l\u00f4 v\u1eadt li\u1ec7u.<\/p>\n<h2 id=\"toc-12-an-toan-va-hoan-thien-be-mat\">An to\u00e0n v\u00e0 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t<\/h2>\n<p>&#8211; Kh\u00f4ng u\u1ed1n g\u1ea7n ngu\u1ed3n l\u1eeda v\u1edbi \u1ed1ng b\u1ecbt k\u00edn (nguy c\u01a1 n\u1ed5).<br \/>\n&#8211; B\u1ea3o h\u1ed9 m\u1eaft\/da khi d\u00f9ng d\u1ea7u b\u00f4i tr\u01a1n v\u00e0 h\u00f3a ch\u1ea5t t\u1ea9y g\u1ec9.<br \/>\n&#8211; Sau u\u1ed1n n\u00f3ng ho\u1eb7c c\u00f3 bi\u1ebfn m\u00e0u: t\u1ea9y g\u1ec9 b\u1eb1ng gel\/paste ph\u00f9 h\u1ee3p Inox v\u00e0 passivation kh\u00f4i ph\u1ee5c l\u1edbp th\u1ee5 \u0111\u1ed9ng.<\/p>\n<h2 id=\"toc-13-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>\u0110\u1ec3 u\u1ed1n \u1ed1ng v\u00e0 h\u1ed9p Inox kh\u00f4ng b\u1ecb m\u00f3p, h\u00e3y b\u1eaft \u0111\u1ea7u t\u1eeb thi\u1ebft k\u1ebf \u0111\u00fang R\/CLR theo t\/D, ch\u1ecdn \u0111\u00fang ph\u01b0\u01a1ng ph\u00e1p (\u01b0u ti\u00ean u\u1ed1n k\u00e9o c\u00f3 mandrel cho R nh\u1ecf), c\u1ea5u h\u00ecnh b\u1ed9 khu\u00f4n chu\u1ea9n (mandrel, wiper, boost, clamp), b\u00f4i tr\u01a1n h\u1ee3p l\u00fd v\u00e0 b\u00f9 g\u00f3c theo m\u00e1c Inox. Ki\u1ec3m so\u00e1t ovality, m\u1ecfng th\u00e0nh v\u00e0 b\u1ec1 m\u1eb7t b\u1eb1ng u\u1ed1n th\u1eed \u2013 t\u1ed1i \u01b0u th\u00f4ng s\u1ed1 tr\u01b0\u1edbc khi s\u1ea3n xu\u1ea5t lo\u1ea1t. V\u1edbi quy tr\u00ecnh tr\u00ean, b\u1ea1n s\u1ebd \u0111\u1ea1t \u0111\u01b0\u1ee3c cung u\u1ed1n s\u1ea1ch, \u0111\u00fang bi\u00ean d\u1ea1ng cho 201\/304\/316, \u0111\u00e1p \u1ee9ng \u0111\u1ed3ng th\u1eddi y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt l\u1eabn th\u1ea9m m\u1ef9.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn u\u1ed1n \u1ed1ng\/h\u1ed9p Inox kh\u00f4ng b\u1ecb m\u00f3p: ch\u1ecdn b\u00e1n k\u00ednh R\/D, mandrel, wiper die, th\u00f4ng s\u1ed1 m\u00e1y v\u00e0 m\u1eb9o ki\u1ec3m so\u00e1t bi\u1ebfn d\u1ea1ng cho 201\/304\/316 t\u1ea1i x\u01b0\u1edfng.<\/p>\n","protected":false},"author":7,"featured_media":1061,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1223","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\/1223","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=1223"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1223\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1061"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}