{"id":1678,"date":"2026-02-15T12:34:28","date_gmt":"2026-02-15T05:34:28","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/uon-ong-hop-inox-khong-mop-chon-ban-kinh-khuon-va-thong-so\/"},"modified":"2026-02-15T12:34:28","modified_gmt":"2026-02-15T05:34:28","slug":"uon-ong-hop-inox-khong-mop-chon-ban-kinh-khuon-va-thong-so","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/uon-ong-hop-inox-khong-mop-chon-ban-kinh-khuon-va-thong-so\/","title":{"rendered":"U\u1ed1n \u1ed1ng\/h\u1ed9p Inox kh\u00f4ng m\u00f3p: ch\u1ecdn b\u00e1n k\u00ednh, khu\u00f4n v\u00e0 th\u00f4ng s\u1ed1"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-hieu-dung-ve-bien-dang-khi-uon-inox\">Hi\u1ec3u \u0111\u00fang v\u1ec1 bi\u1ebfn d\u1ea1ng khi u\u1ed1n Inox<\/a><\/li>\n<li><a href=\"#toc-1-chon-vat-lieu-va-chuan-bi-phoi\">Ch\u1ecdn v\u1eadt li\u1ec7u v\u00e0 chu\u1ea9n b\u1ecb ph\u00f4i<\/a><\/li>\n<li><a href=\"#toc-2-chon-ban-kinh-toi-thieu-theo-dt\">Ch\u1ecdn b\u00e1n k\u00ednh t\u1ed1i thi\u1ec3u theo D\/t<\/a><\/li>\n<li><a href=\"#toc-3-chon-cong-nghe-uon-phu-hop\">Ch\u1ecdn c\u00f4ng ngh\u1ec7 u\u1ed1n ph\u00f9 h\u1ee3p<\/a><\/li>\n<li><a href=\"#toc-4-thiet-lap-khuon-va-thong-so-cho-ong-tron\">Thi\u1ebft l\u1eadp khu\u00f4n v\u00e0 th\u00f4ng s\u1ed1 cho \u1ed1ng tr\u00f2n<\/a><\/li>\n<li><a href=\"#toc-5-thiet-lap-cho-hop-vuongchu-nhat\">Thi\u1ebft l\u1eadp cho h\u1ed9p vu\u00f4ng\/ch\u1eef nh\u1eadt<\/a><\/li>\n<li><a href=\"#toc-6-giai-phap-cho-xuong-nho-khong-co-mandrel-bender\">Gi\u1ea3i ph\u00e1p cho x\u01b0\u1edfng nh\u1ecf, kh\u00f4ng c\u00f3 mandrel bender<\/a><\/li>\n<li><a href=\"#toc-7-kiem-soat-boi-tron-va-chong-galling-xuocdinh\">Ki\u1ec3m so\u00e1t b\u00f4i tr\u01a1n v\u00e0 ch\u1ed1ng galling (x\u01b0\u1edbc\u2013d\u00ednh)<\/a><\/li>\n<li><a href=\"#toc-8-tinh-chieu-dai-phat-trien-va-bu-dan-hoi\">T\u00ednh chi\u1ec1u d\u00e0i ph\u00e1t tri\u1ec3n v\u00e0 b\u00f9 \u0111\u00e0n h\u1ed3i<\/a><\/li>\n<li><a href=\"#toc-9-gioi-han-chat-luong-va-do-kiem-sau-uon\">Gi\u1edbi h\u1ea1n ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u0111o ki\u1ec3m sau u\u1ed1n<\/a><\/li>\n<li><a href=\"#toc-10-checklist-cai-may-nhanh-ong-tron-304-381-15-mm-90-\">Checklist c\u00e0i m\u00e1y nhanh (\u1ed1ng tr\u00f2n 304 \u00d838.1 \u00d7 1.5 mm, 90\u00b0, CLR = 76 mm)<\/a><\/li>\n<li><a href=\"#toc-11-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-12-xu-ly-sau-uon-va-bao-toan-chong-an-mon\">X\u1eed l\u00fd sau u\u1ed1n v\u00e0 b\u1ea3o to\u00e0n ch\u1ed1ng \u0103n m\u00f2n<\/a><\/li>\n<li><a href=\"#toc-13-meo-chon-nhanh-theo-ung-dung\">M\u1eb9o ch\u1ecdn nhanh theo \u1ee9ng d\u1ee5ng<\/a><\/li>\n<li><a href=\"#toc-14-tai-lieu-tham-khao\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-15-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>U\u1ed1n \u1ed1ng v\u00e0 h\u1ed9p Inox kh\u00f4ng b\u1ecb m\u00f3p, nh\u0103n hay b\u1eb9p oval l\u00e0 y\u00eau c\u1ea7u c\u1ed1t l\u00f5i trong gia c\u00f4ng lan can, khung m\u00e1y, \u0111\u01b0\u1eddng \u1ed1ng c\u00f4ng ngh\u1ec7\u2026 thu\u1ed9c m\u1ecdi h\u1ea1ng m\u1ee5c Inox. B\u00e0i vi\u1ebft n\u00e0y t\u1ed5ng h\u1ee3p c\u00e1c nguy\u00ean l\u00fd c\u01a1 h\u1ecdc, l\u1ef1a ch\u1ecdn b\u00e1n k\u00ednh, thi\u1ebft l\u1eadp khu\u00f4n\u2013mandrel\u2013wiper, b\u00f4i tr\u01a1n, c\u0169ng nh\u01b0 quy tr\u00ecnh ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ec3 b\u1ea1n \u0111\u1ea1t b\u1ec1 m\u1eb7t \u0111\u1eb9p, sai s\u1ed1 nh\u1ecf ngay l\u1ea7n \u0111\u1ea7u.<\/p>\n<h2 id=\"toc-0-hieu-dung-ve-bien-dang-khi-uon-inox\">Hi\u1ec3u \u0111\u00fang v\u1ec1 bi\u1ebfn d\u1ea1ng khi u\u1ed1n Inox<\/h2>\n<p>&#8211; Inox (\u0111\u1eb7c bi\u1ec7t 304\/316) c\u00f3 \u0111\u1ed9 h\u00f3a b\u1ec1n bi\u1ebfn d\u1ea1ng cao, n\u00ean:<br \/>\n  &#8211; D\u1ec5 \u0111\u00e0n h\u1ed3i ng\u01b0\u1ee3c (springback) h\u01a1n th\u00e9p carbon.<br \/>\n  &#8211; Th\u00e0nh ngo\u00e0i (extrados) m\u1ecfng \u0111i; th\u00e0nh trong (intrados) d\u1ed3n v\u1eadt li\u1ec7u d\u1ec5 nh\u0103n.<br \/>\n  &#8211; \u1ed0ng tr\u00f2n c\u00f3 xu h\u01b0\u1edbng oval h\u00f3a; h\u1ed9p vu\u00f4ng\/ch\u1eef nh\u1eadt d\u1ec5 b\u1eb9p \u1edf th\u00e0nh m\u1ecfng.<br \/>\n&#8211; M\u1ee5c ti\u00eau k\u1ef9 thu\u1eadt:<br \/>\n  &#8211; Kh\u00f4ng nh\u0103n m\u1eb7t trong, kh\u00f4ng d\u1eadp m\u1eb7t ngo\u00e0i.<br \/>\n  &#8211; \u0110\u1ed9 oval (ovality) th\u1ea5p.<br \/>\n  &#8211; T\u1ec9 l\u1ec7 m\u1ecfng th\u00e0nh ngo\u00e0i trong gi\u1edbi h\u1ea1n cho ph\u00e9p \u1ee9ng d\u1ee5ng.<\/p>\n<h3>Ch\u1ec9 s\u1ed1 c\u1ea7n theo d\u00f5i<\/h3>\n<p>&#8211; D\/t: t\u1ef7 s\u1ed1 \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i D (ho\u1eb7c c\u1ea1nh l\u1edbn v\u1edbi h\u1ed9p) tr\u00ean b\u1ec1 d\u00e0y t. D\/t c\u00e0ng cao \u2192 c\u00e0ng kh\u00f3 u\u1ed1n.<br \/>\n&#8211; CLR (Centerline Radius): b\u00e1n k\u00ednh u\u1ed1n theo t\u00e2m. Ch\u1ecdn CLR ph\u00f9 h\u1ee3p l\u00e0 y\u1ebfu t\u1ed1 s\u1ed1 1.<br \/>\n&#8211; Ovality (%) = (OD_max \u2212 OD_min) \/ OD_nom \u00d7 100.<br \/>\n&#8211; Thinning (%) = (t0 \u2212 t_min_extrados) \/ t0 \u00d7 100.<br \/>\n&#8211; Springback (\u00b0): g\u00f3c ph\u1ea3i \u201cb\u00f9\u201d khi c\u00e0i m\u00e1y.<\/p>\n<h2 id=\"toc-1-chon-vat-lieu-va-chuan-bi-phoi\">Ch\u1ecdn v\u1eadt li\u1ec7u v\u00e0 chu\u1ea9n b\u1ecb ph\u00f4i<\/h2>\n<p>&#8211; M\u00e1c Inox: 304\/304L v\u00e0 316\/316L u\u1ed1n t\u1ed1t h\u01a1n 201 nh\u1edd \u0111\u1ed9 d\u1ebbo v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng n\u1ee9t cao h\u01a1n.<br \/>\n&#8211; Ch\u1ee9ng ch\u1ec9\/ti\u00eau chu\u1ea9n \u1ed1ng:<br \/>\n  &#8211; \u1ed0ng trang tr\u00ed c\u01a1 kh\u00ed: ASTM A554 (b\u1ec1 m\u1eb7t, dung sai, th\u1eed d\u1eb9t\/ovality).<br \/>\n  &#8211; \u1ed0ng c\u00f4ng nghi\u1ec7p: ASTM A269\/A312 (seamless\/welded), y\u00eau c\u1ea7u kh\u1eaft khe h\u01a1n v\u1ec1 c\u01a1 t\u00ednh v\u00e0 s\u1ea1ch b\u1ec1 m\u1eb7t trong.<br \/>\n&#8211; \u0110\u01b0\u1eddng h\u00e0n ERW: \u0111\u1eb7t \u1edf v\u00f9ng \u201ctrung t\u00ednh\u201d khi u\u1ed1n:<br \/>\n  &#8211; \u1ed0ng tr\u00f2n: xoay \u0111\u01b0\u1eddng h\u00e0n l\u1ec7ch ~30\u201345\u00b0 so v\u1edbi m\u1eb7t ph\u1eb3ng u\u1ed1n (tr\u00e1nh \u0111\u00fang intrados\/extrados).<br \/>\n  &#8211; H\u1ed9p: xoay sao cho \u0111\u01b0\u1eddng h\u00e0n kh\u00f4ng n\u1eb1m \u1edf th\u00e0nh ch\u1ecbu n\u00e9n nh\u1ea5t.<br \/>\n&#8211; Chu\u1ea9n b\u1ecb b\u1ec1 m\u1eb7t:<br \/>\n  &#8211; Gi\u1eef film b\u1ea3o v\u1ec7 (PVC) v\u1edbi \u1ed1ng\/h\u1ed9p m\u1ea1 g\u01b0\u01a1ng\/HL.<br \/>\n  &#8211; L\u00e0m s\u1ea1ch d\u1ea7u b\u1ea9n, ba via m\u00e9p c\u1eaft; b\u1ecbt k\u00edn \u0111\u1ea7u n\u1ebfu c\u00f3 nh\u1ed3i c\u00e1t.<\/p>\n<h2 id=\"toc-2-chon-ban-kinh-toi-thieu-theo-dt\">Ch\u1ecdn b\u00e1n k\u00ednh t\u1ed1i thi\u1ec3u theo D\/t<\/h2>\n<p>G\u1ee3i \u00fd th\u1ef1c t\u1ebf cho Inox 304\/316 (u\u1ed1n ngu\u1ed9i, khu\u00f4n t\u1ed1t, b\u00f4i tr\u01a1n \u0111\u00fang):<br \/>\n&#8211; \u1ed0ng tr\u00f2n:<br \/>\n  &#8211; Kh\u00f4ng mandrel: CLR \u2265 3.0D; D\/t \u2264 18.<br \/>\n  &#8211; C\u00f3 mandrel + wiper: CLR \u2248 1.5\u20132.0D; c\u00f3 th\u1ec3 \u0111\u1ebfn \u22481.0D v\u1edbi D\/t \u2264 12 v\u00e0 m\u00e1y CNC c\u00f3 \u201cboost\u201d.<br \/>\n&#8211; H\u1ed9p vu\u00f4ng\/ch\u1eef nh\u1eadt:<br \/>\n  &#8211; Kh\u00f4ng mandrel: CLR \u2265 3.0\u20133.5 l\u1ea7n c\u1ea1nh l\u1edbn (A).<br \/>\n  &#8211; C\u00f3 mandrel v\u00e0 wiper, ch\u00e8n ch\u1ed1ng th\u00e0nh: CLR \u2248 1.5\u20132.5A t\u00f9y t.<br \/>\nL\u01b0u \u00fd: N\u1ebfu d\u00f9ng cu\u1ed9n 3 tr\u1ee5c (roll bending) cho b\u00e1n k\u00ednh l\u1edbn (CLR > 8\u201310D) s\u1ebd gi\u1ea3m r\u1ee7i ro m\u00f3p\/nh\u0103n h\u01a1n so v\u1edbi u\u1ed1n k\u00e9o\u2013qu\u1ea5n.<\/p>\n<h2 id=\"toc-3-chon-cong-nghe-uon-phu-hop\">Ch\u1ecdn c\u00f4ng ngh\u1ec7 u\u1ed1n ph\u00f9 h\u1ee3p<\/h2>\n<p>&#8211; Rotary Draw Bending (RDB, u\u1ed1n k\u00e9o\u2013qu\u1ea5n):<br \/>\n  &#8211; Ch\u00ednh x\u00e1c cao, ki\u1ec3m so\u00e1t t\u1ed1t b\u1ec1 m\u1eb7t. B\u1eaft bu\u1ed9c d\u00f9ng cho CLR nh\u1ecf v\u00e0 chi ti\u1ebft l\u1eb7p l\u1ea1i.<br \/>\n  &#8211; D\u1ee5ng c\u1ee5: khu\u00f4n u\u1ed1n (bend die), khu\u00f4n t\u1ef3 (pressure die), k\u1eb9p (clamp die), mandrel, wiper die.<br \/>\n&#8211; Roll Bending (3\u20134 tr\u1ee5c):<br \/>\n  &#8211; Cho cung l\u1edbn, bi\u1ebfn d\u1ea1ng ph\u00e2n b\u1ed1 \u0111\u1ec1u, \u00edt r\u1ee7i ro oval. Ph\u00f9 h\u1ee3p k\u1ebft c\u1ea5u ki\u1ebfn tr\u00fac.<br \/>\n&#8211; Compression\/Press Bending:<br \/>\n  &#8211; Nhanh nh\u01b0ng d\u1ec5 m\u00f3p\/nh\u0103n, ph\u00f9 h\u1ee3p chi ti\u1ebft th\u00f4, b\u00e1n k\u00ednh l\u1edbn v\u00e0 th\u00e0nh d\u00e0y.<br \/>\n&#8211; Induction\/Hot Bending:<br \/>\n  &#8211; \u00c1p d\u1ee5ng cho \u1ed1ng d\u00e0y\/c\u1ee1 l\u1edbn. V\u1edbi Inox c\u1ea7n ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ec3 tr\u00e1nh nh\u1ea1y c\u1ea3m h\u00f3a (sensitization); \u01b0u ti\u00ean th\u00e9p kh\u00f4ng g\u1ec9 L (304L\/316L).<\/p>\n<h2 id=\"toc-4-thiet-lap-khuon-va-thong-so-cho-ong-tron\">Thi\u1ebft l\u1eadp khu\u00f4n v\u00e0 th\u00f4ng s\u1ed1 cho \u1ed1ng tr\u00f2n<\/h2>\n<h3>B\u1ed9 d\u1ee5ng c\u1ee5 b\u1eaft bu\u1ed9c khi c\u1ea7n b\u1ec1 m\u1eb7t \u0111\u1eb9p<\/h3>\n<p>&#8211; Mandrel:<br \/>\n  &#8211; Plug mandrel (\u0111\u1ea7u \u0111\u1eb7c) cho CLR \u2265 2D.<br \/>\n  &#8211; Ball\/smart mandrel (bi kh\u1edbp) cho CLR \u2264 2D ho\u1eb7c D\/t cao.<br \/>\n  &#8211; V\u1ecb tr\u00ed: m\u0169i mandrel nh\u00f4 0.5\u20131.0 mm qua \u0111\u01b0\u1eddng ti\u1ebfp tuy\u1ebfn khu\u00f4n u\u1ed1n; t\u0103ng nh\u00f4 khi D\/t l\u1edbn.<br \/>\n&#8211; Wiper die:<br \/>\n  &#8211; L\u1eafp s\u00e1t intrados, m\u00e9p c\u1eaft \u201cfeather\u201d m\u1ea3nh \u0111\u1ec3 c\u1eaft n\u1ebfp nh\u0103n; g\u00f3c nghi\u00eang 10\u201320\u00b0 so v\u1edbi ph\u01b0\u01a1ng ti\u1ebfp tuy\u1ebfn.<br \/>\n  &#8211; Feeder d\u00e0y 0.05\u20130.2 mm (t\u00f9y c\u1ee1 \u1ed1ng); b\u1ea3o \u0111\u1ea3m b\u00f4i tr\u01a1n t\u1ed1t.<br \/>\n&#8211; Pressure die:<br \/>\n  &#8211; L\u1ef1c t\u1ef3 \u0111\u1ee7 gi\u1eef \u1ed1ng kh\u00f4ng tr\u01b0\u1ee3t nh\u01b0ng kh\u00f4ng \u0111\u1ec3 l\u1ea1i v\u1ebft; v\u1edbi m\u00e1y CNC, d\u00f9ng \u201cboost\u201d 1\u20138% chi\u1ec1u d\u00e0i \u0111\u1ec3 h\u1ea1n ch\u1ebf m\u1ecfng th\u00e0nh ngo\u00e0i.<br \/>\n&#8211; K\u1eb9p (clamp) v\u00e0 b\u00e1n k\u00ednh khu\u00f4n:<br \/>\n  &#8211; Chi\u1ec1u d\u00e0i k\u1eb9p t\u1ed1i thi\u1ec3u 2.5\u20133.0\u00d7D; b\u1ec1 m\u1eb7t khu\u00f4n si\u00eau m\u1ecbn (Ra \u2264 0.4\u20130.8 \u00b5m) \u0111\u1ec3 tr\u00e1nh h\u1eb1n.<\/p>\n<h3>Th\u00f4ng s\u1ed1 khuy\u1ebfn ngh\u1ecb ban \u0111\u1ea7u<\/h3>\n<p>&#8211; B\u00f4i tr\u01a1n: m\u1ee1 EP cho Inox (MoS2\/graphite), d\u1ea7u \u00e1p l\u1ef1c c\u1ef1c tr\u1ecb kh\u00f4ng ch\u1ee9a clo (th\u00e2n thi\u1ec7n m\u00f4i tr\u01b0\u1eddng), b\u1ed9t x\u00e0 ph\u00f2ng c\u00f4ng nghi\u1ec7p cho x\u01b0\u1edfng nh\u1ecf.<br \/>\n&#8211; B\u00f9 \u0111\u00e0n h\u1ed3i: 2\u20134\u00b0 cho CLR ~1.5\u20132D; c\u00f3 th\u1ec3 5\u20138\u00b0 v\u1edbi t m\u1ecfng\/D l\u1edbn. Tr\u00e1nh th\u1eed\u2013s\u1eeda nhi\u1ec1u l\u1ea7n v\u00ec Inox h\u00f3a b\u1ec1n nhanh.<br \/>\n&#8211; T\u1ed1c \u0111\u1ed9 u\u1ed1n: v\u1eeba ph\u1ea3i \u0111\u1ec3 gi\u1ea3m ma s\u00e1t nhi\u1ec7t; t\u1ed1c \u0111\u1ed9 qu\u00e1 ch\u1eadm d\u1ec5 in v\u1ebft, qu\u00e1 nhanh d\u1ec5 tr\u01b0\u1ee3t.<\/p>\n<h2 id=\"toc-5-thiet-lap-cho-hop-vuongchu-nhat\">Thi\u1ebft l\u1eadp cho h\u1ed9p vu\u00f4ng\/ch\u1eef nh\u1eadt<\/h2>\n<p>&#8211; D\u00f9ng mandrel c\u00f3 \u0111\u1ee1 th\u00e0nh (insert) ho\u1eb7c g\u1ed1i n\u1ed9i d\u1ea1ng \u201c\u0111\u1ea7u gi\u00e0y\u201d \u0111\u1ec3 ch\u1ed1ng b\u1eb9p.<br \/>\n&#8211; B\u1ed5 sung shim ch\u1ed1ng x\u1eb9p hai th\u00e0nh b\u00ean (side rolls\/anti-flattening blocks).<br \/>\n&#8211; \u01afu ti\u00ean khu\u00f4n c\u00f3 b\u00e1n k\u00ednh g\u00f3c v\u00e0o (entry radius) l\u1edbn h\u01a1n m\u1ed9t ch\u00fat \u0111\u1ec3 ph\u00e2n b\u1ed1 bi\u1ebfn d\u1ea1ng \u0111\u1ec1u, h\u1ea1n ch\u1ebf n\u1ee9t t\u1ea1i g\u00f3c h\u00e0n.<br \/>\n&#8211; V\u1edbi h\u1ed9p th\u00e0nh m\u1ecfng, c\u00e2n nh\u1eafc cu\u1ed9n 3 tr\u1ee5c nhi\u1ec1u pass cho b\u00e1n k\u00ednh trung\u2013l\u1edbn thay v\u00ec RDB m\u1ed9t pass.<\/p>\n<h2 id=\"toc-6-giai-phap-cho-xuong-nho-khong-co-mandrel-bender\">Gi\u1ea3i ph\u00e1p cho x\u01b0\u1edfng nh\u1ecf, kh\u00f4ng c\u00f3 mandrel bender<\/h2>\n<p>&#8211; Nh\u1ed3i c\u00e1t kh\u00f4 h\u1ea1t m\u1ecbn, \u0111\u1ea7m ch\u1eb7t, b\u1ecbt k\u00edn hai \u0111\u1ea7u; \u0111\u1ed1t gia nhi\u1ec7t c\u1ee5c b\u1ed9 nh\u1eb9 (\u2264300\u2013350\u00b0C) ch\u1ec9 \u0111\u1ec3 gi\u1ea3m ma s\u00e1t, kh\u00f4ng nung \u0111\u1ecf. Ph\u00f9 h\u1ee3p chi ti\u1ebft m\u1ef9 thu\u1eadt, CLR \u2265 3D.<br \/>\n&#8211; Con l\u00f2 xo\/ru\u1ed9t g\u00e0 l\u00f3t trong cho \u1ed1ng nh\u1ecf D \u2264 20 mm, t \u2265 1.0 mm.<br \/>\n&#8211; Khu\u00f4n b\u00e1n k\u00ednh l\u1edbn h\u01a1n (\u22653\u20134D) v\u00e0 u\u1ed1n nhi\u1ec1u l\u1ea7n t\u0103ng d\u1ea7n thay v\u00ec d\u1ed3n l\u1ef1c m\u1ed9t \u0111i\u1ec3m.<br \/>\n&#8211; B\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t b\u1eb1ng b\u0103ng th\u00e9p kh\u00f4ng g\u1ec9 m\u1ecfng ho\u1eb7c b\u0103ng PET tr\u00ean m\u00e1 k\u1eb9p.<\/p>\n<p>C\u1ea3nh b\u00e1o: H\u1ee3p kim \u201ckim lo\u1ea1i n\u00f3ng ch\u1ea3y th\u1ea5p\u201d (wood\u2019s metal) truy\u1ec1n th\u1ed1ng c\u00f3 th\u1ec3 ch\u1ee9a Cd\/Pb \u2013 kh\u00f4ng khuy\u1ebfn ngh\u1ecb v\u00ec \u0111\u1ed9c h\u1ea1i.<\/p>\n<h2 id=\"toc-7-kiem-soat-boi-tron-va-chong-galling-xuocdinh\">Ki\u1ec3m so\u00e1t b\u00f4i tr\u01a1n v\u00e0 ch\u1ed1ng galling (x\u01b0\u1edbc\u2013d\u00ednh)<\/h2>\n<p>&#8211; D\u00f9ng m\u1ee1 MoS2\/graphite ho\u1eb7c d\u1ea7u EP chuy\u00ean d\u1ee5ng cho Inox; tra \u0111\u1ec1u cho khu\u00f4n, wiper, mandrel.<br \/>\n&#8211; Tr\u00e1nh d\u1ea7u g\u1ed1c clo c\u0169; hi\u1ec7n nay \u01b0a chu\u1ed9ng ester t\u1ed5ng h\u1ee3p c\u00f3 ph\u1ee5 gia EP.<br \/>\n&#8211; V\u1ec7 sinh, thay l\u1ecdc d\u1ea7u \u0111\u1ecbnh k\u1ef3; b\u1ec1 m\u1eb7t khu\u00f4n \u0111\u00e1nh b\u00f3ng, c\u1ee9ng h\u00f3a \u0111\u1ec3 gi\u1ea3m ma s\u00e1t.<\/p>\n<h2 id=\"toc-8-tinh-chieu-dai-phat-trien-va-bu-dan-hoi\">T\u00ednh chi\u1ec1u d\u00e0i ph\u00e1t tri\u1ec3n v\u00e0 b\u00f9 \u0111\u00e0n h\u1ed3i<\/h2>\n<p>&#8211; Chi\u1ec1u d\u00e0i cung u\u1ed1n: L_arc = \u03c0 \u00d7 CLR \u00d7 (g\u00f3c\/180).<br \/>\n&#8211; Chi\u1ec1u d\u00e0i ph\u00f4i: t\u1ed5ng c\u00e1c \u0111o\u1ea1n th\u1eb3ng + L_arc \u2212 allowance k\u1eb9p theo m\u00e1y\/khu\u00f4n.<br \/>\n&#8211; B\u00f9 springback:<br \/>\n  &#8211; Th\u1eed nghi\u1ec7m 1\u20132 ph\u00f4i, \u0111o g\u00f3c sau h\u1ed3i; c\u00e0i m\u00e1y over-bend t\u01b0\u01a1ng \u1ee9ng.<br \/>\n  &#8211; Tr\u00e1nh u\u1ed1n\u2013n\u1eafn nhi\u1ec1u l\u1ea7n v\u00ec t\u0103ng h\u00f3a b\u1ec1n \u2192 r\u1ea1n n\u1ee9t vi m\u00f4.<\/p>\n<h2 id=\"toc-9-gioi-han-chat-luong-va-do-kiem-sau-uon\">Gi\u1edbi h\u1ea1n ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u0111o ki\u1ec3m sau u\u1ed1n<\/h2>\n<p>&#8211; Ngo\u1ea1i quan: kh\u00f4ng h\u1eb1n v\u1ebft s\u00e2u, kh\u00f4ng nh\u0103n intrados, kh\u00f4ng n\u1ee9t g\u1edd.<br \/>\n&#8211; K\u00edch th\u01b0\u1edbc:<br \/>\n  &#8211; Ovality: \u0111\u1eb7t m\u1ee5c ti\u00eau \u2264 5% cho ki\u1ebfn tr\u00fac; \u2264 3% cho l\u1eafp gh\u00e9p ch\u00ednh x\u00e1c. Tham chi\u1ebfu ASTM A554: \u0111\u1ed9 oval th\u01b0\u1eddng ph\u1ea3i n\u1eb1m trong dung sai OD danh ngh\u0129a.<br \/>\n  &#8211; Thinning: \u2264 12\u201315% cho k\u1ebft c\u1ea5u ki\u1ebfn tr\u00fac; \u2264 20% t\u1ed1i \u0111a v\u1edbi k\u1ebft c\u1ea5u ch\u1ecbu l\u1ef1c th\u1ea5p. D\u00f9ng si\u00eau \u00e2m\/\u0111o c\u01a1 \u0111\u1ec3 ki\u1ec3m.<br \/>\n&#8211; \u0110\u1ed9 ch\u00ednh x\u00e1c cung: sai s\u1ed1 g\u00f3c \u2264 \u00b10.5\u20131.0\u00b0, sai s\u1ed1 CLR \u2264 \u00b10.5\u20131.0 mm t\u00f9y k\u00edch th\u01b0\u1edbc.<\/p>\n<h2 id=\"toc-10-checklist-cai-may-nhanh-ong-tron-304-381-15-mm-90-\">Checklist c\u00e0i m\u00e1y nhanh (\u1ed1ng tr\u00f2n 304 \u00d838.1 \u00d7 1.5 mm, 90\u00b0, CLR = 76 mm)<\/h2>\n<p>&#8211; D\/t = 38.1\/1.5 \u2248 25.4 (kh\u00e1 m\u1ecfng) \u2192 b\u1eaft bu\u1ed9c mandrel bi + wiper, boost ~3\u20135%.<br \/>\n&#8211; M\u0169i mandrel nh\u00f4 ~0.8 mm; wiper feather m\u1ea3nh, b\u00f4i tr\u01a1n \u0111\u1eadm.<br \/>\n&#8211; L\u1ef1c k\u1eb9p \u0111\u1ee7 ch\u1ed1ng tr\u01b0\u1ee3t; pressure die t\u0103ng d\u1ea7n \u0111\u1ebfn khi v\u1ebft nh\u0103n bi\u1ebfn m\u1ea5t.<br \/>\n&#8211; B\u00f9 \u0111\u00e0n h\u1ed3i: th\u1eed v\u1edbi +4\u00b0; tinh ch\u1ec9nh theo \u0111o th\u1ef1c t\u1ebf.<br \/>\n&#8211; Ki\u1ec3m ovality m\u1ee5c ti\u00eau \u2264 5%; n\u1ebfu v\u01b0\u1ee3t, t\u0103ng boost ho\u1eb7c t\u0103ng CLR.<\/p>\n<h2 id=\"toc-11-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; Nh\u0103n m\u1eb7t trong:<br \/>\n  &#8211; Nguy\u00ean nh\u00e2n: thi\u1ebfu wiper, mandrel l\u00f9i, l\u1ef1c t\u1ef3 y\u1ebfu.<br \/>\n  &#8211; Kh\u1eafc ph\u1ee5c: ti\u1ebfn mandrel, t\u0103ng pressure\/boost, l\u1eafp wiper \u0111\u00fang g\u00f3c; t\u0103ng b\u00f4i tr\u01a1n.<br \/>\n&#8211; M\u00f3p\/ch\u00e9p th\u00e0nh ngo\u00e0i:<br \/>\n  &#8211; Nguy\u00ean nh\u00e2n: CLR qu\u00e1 nh\u1ecf so v\u1edbi D\/t, l\u1ef1c k\u1eb9p k\u00e9m, thi\u1ebfu boost.<br \/>\n  &#8211; Kh\u1eafc ph\u1ee5c: t\u0103ng CLR, d\u00f9ng mandrel bi, t\u0103ng l\u1ef1c k\u1eb9p\/boost; n\u00e2ng c\u1ea5p khu\u00f4n b\u1ec1 m\u1eb7t m\u1ecbn.<br \/>\n&#8211; Oval qu\u00e1 m\u1ee9c:<br \/>\n  &#8211; Nguy\u00ean nh\u00e2n: kh\u00f4ng c\u00f3 n\u1ed9i \u0111\u1ee1, b\u00e1n k\u00ednh nh\u1ecf, th\u00e0nh m\u1ecfng.<br \/>\n  &#8211; Kh\u1eafc ph\u1ee5c: d\u00f9ng mandrel, \u0111\u1ed5i sang roll bending cho cung l\u1edbn, t\u0103ng t.<br \/>\n&#8211; X\u01b0\u1edbc b\u1ec1 m\u1eb7t\/galling:<br \/>\n  &#8211; Nguy\u00ean nh\u00e2n: b\u00f4i tr\u01a1n k\u00e9m, khu\u00f4n nh\u00e1m.<br \/>\n  &#8211; Kh\u1eafc ph\u1ee5c: \u0111\u00e1nh b\u00f3ng khu\u00f4n, d\u00f9ng m\u1ee1 EP ph\u00f9 h\u1ee3p, b\u1ea3o v\u1ec7 b\u1eb1ng film.<br \/>\n&#8211; N\u1ee9t t\u1ea1i \u0111\u01b0\u1eddng h\u00e0n:<br \/>\n  &#8211; Nguy\u00ean nh\u00e2n: \u0111\u1eb7t h\u00e0n \u1edf v\u00f9ng c\u0103ng\/n\u00e9n c\u1ef1c \u0111\u1ea1i, ch\u1ea5t l\u01b0\u1ee3ng h\u00e0n k\u00e9m.<br \/>\n  &#8211; Kh\u1eafc ph\u1ee5c: xoay \u0111\u01b0\u1eddng h\u00e0n v\u00e0o v\u00f9ng trung t\u00ednh; ch\u1ecdn \u1ed1ng theo ASTM; t\u0103ng nhi\u1ec7t luy\u1ec7n h\u00e0n (v\u1edbi \u1ed1ng c\u00f4ng nghi\u1ec7p).<\/p>\n<h2 id=\"toc-12-xu-ly-sau-uon-va-bao-toan-chong-an-mon\">X\u1eed l\u00fd sau u\u1ed1n v\u00e0 b\u1ea3o to\u00e0n ch\u1ed1ng \u0103n m\u00f2n<\/h2>\n<p>&#8211; T\u1ea9y g\u1ec9\u2013th\u1ee5 \u0111\u1ed9ng h\u00f3a (pickling &#038; passivation) v\u00f9ng c\u00f3 v\u1ebft k\u1eb9p\/ma s\u00e1t \u0111\u1ec3 ph\u1ee5c h\u1ed3i l\u1edbp oxit cr\u00f4m.<br \/>\n&#8211; R\u1eeda s\u1ea1ch d\u1ea7u m\u1ee1; v\u1edbi s\u1ea3n ph\u1ea9m trang tr\u00ed, \u0111\u00e1nh b\u00f3ng ph\u1ee5c h\u1ed3i h\u1ea1t x\u01b0\u1edbc\/HL.<br \/>\n&#8211; Kh\u00f4ng h\u00e0n b\u1ed5 sung l\u00ean v\u00f9ng u\u1ed1n \u0111\u00e3 h\u00f3a b\u1ec1n n\u1ebfu kh\u00f4ng c\u1ea7n thi\u1ebft; n\u1ebfu h\u00e0n, ch\u00fa \u00fd ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ea7u v\u00e0o.<\/p>\n<h2 id=\"toc-13-meo-chon-nhanh-theo-ung-dung\">M\u1eb9o ch\u1ecdn nhanh theo \u1ee9ng d\u1ee5ng<\/h2>\n<p>&#8211; Ki\u1ebfn tr\u00fac n\u1ed9i\u2013ngo\u1ea1i th\u1ea5t (lan can, khung trang tr\u00ed):<br \/>\n  &#8211; \u01afu ti\u00ean 304; d\u00f9ng RDB + mandrel + wiper cho CLR \u2264 2D; gi\u1eef ovality \u2264 5%.<br \/>\n&#8211; \u0110\u01b0\u1eddng \u1ed1ng c\u00f4ng nghi\u1ec7p:<br \/>\n  &#8211; 316\/316L cho m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n; roll\/induction cho b\u00e1n k\u00ednh l\u1edbn; ki\u1ec3m so\u00e1t m\u1ecfng th\u00e0nh theo chu\u1ea9n l\u1eafp \u1ed1ng.<br \/>\n&#8211; Khung m\u00e1y\/k\u1ebft c\u1ea5u:<br \/>\n  &#8211; H\u1ed9p 304\/201 d\u00e0y \u2265 1.5\u20132.0 mm; CLR \u2265 2\u20133A; ch\u1ed1ng b\u1eb9p b\u1eb1ng insert.<\/p>\n<h2 id=\"toc-14-tai-lieu-tham-khao\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n<p>&#8211; ASTM A554 \u2013 Specification for Welded Stainless Steel Mechanical Tubing.<br \/>\n&#8211; ASTM A269\/A312 \u2013 Seamless and Welded Austenitic Stainless Steel Tubing\/Pipe.<br \/>\n&#8211; SSINA (Specialty Steel Industry of North America) \u2013 Designer Handbook: Fabrication of Stainless Steel, Bending and Forming.<br \/>\n&#8211; Outokumpu \u2013 Fabrication of Stainless Steel: Tube Bending Guidelines.<br \/>\n&#8211; FMA\/TPA (Fabricators &#038; Manufacturers Association \/ The Tube &#038; Pipe Journal) \u2013 Best practices in mandrel and wiper die setup for stainless tube.<\/p>\n<h2 id=\"toc-15-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>\u0110\u1ec3 u\u1ed1n \u1ed1ng\/h\u1ed9p Inox kh\u00f4ng m\u00f3p v\u00e0 kh\u00f4ng bi\u1ebfn d\u1ea1ng, h\u00e3y b\u1eaft \u0111\u1ea7u t\u1eeb vi\u1ec7c ch\u1ecdn \u0111\u00fang CLR theo D\/t, d\u00f9ng \u0111\u00fang c\u00f4ng ngh\u1ec7 (\u01b0u ti\u00ean RDB v\u1edbi mandrel v\u00e0 wiper cho b\u00e1n k\u00ednh nh\u1ecf), thi\u1ebft l\u1eadp v\u1ecb tr\u00ed mandrel\u2013g\u00f3c wiper\u2013l\u1ef1c k\u1eb9p\/boost ch\u00ednh x\u00e1c, b\u00f4i tr\u01a1n chuy\u00ean d\u1ee5ng \u0111\u1ec3 ch\u1ed1ng galling, v\u00e0 \u0111o ki\u1ec3m ovality\/thinning sau u\u1ed1n. N\u1ebfu thi\u1ebfu m\u00e1y chuy\u00ean, h\u00e3y t\u0103ng b\u00e1n k\u00ednh, nh\u1ed3i c\u00e1t v\u00e0 b\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t. Th\u1ef1c hi\u1ec7n \u0111\u00fang c\u00e1c nguy\u00ean t\u1eafc n\u00e0y, b\u1ea1n s\u1ebd \u0111\u1ea1t b\u1ec1 m\u1eb7t \u0111\u1eb9p, k\u00edch th\u01b0\u1edbc chu\u1ea9n, n\u0103ng su\u1ea5t cao v\u00e0 gi\u1ea3m ph\u1ebf ph\u1ea9m ngay t\u1eeb l\u00f4 \u0111\u1ea7u ti\u00ean.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n ch\u1ecdn khu\u00f4n, m\u00e1y u\u1ed1n v\u00e0 v\u1eadt t\u01b0 Inox ph\u00f9 h\u1ee3p d\u1ef1 \u00e1n? 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>H\u01b0\u1edbng d\u1eabn u\u1ed1n \u1ed1ng v\u00e0 h\u1ed9p Inox kh\u00f4ng m\u00f3p, kh\u00f4ng nh\u0103n: ch\u1ecdn m\u00e1c, D\/t, b\u00e1n k\u00ednh t\u1ed1i thi\u1ec3u, khu\u00f4n\u2013mandrel\u2013wiper, l\u1ef1c k\u1eb9p\/boost, b\u00f4i tr\u01a1n, ki\u1ec3m tra ovality.<\/p>\n","protected":false},"author":7,"featured_media":1053,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1678","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\/1678","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=1678"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1678\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1053"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1678"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1678"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1678"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}