{"id":681208,"date":"2024-07-28T03:11:20","date_gmt":"2024-07-28T02:11:20","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=681208"},"modified":"2024-07-28T03:11:20","modified_gmt":"2024-07-28T02:11:20","slug":"toi-uu-hoa-nhiet-cho-cau-truc-in-3d","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/toi-uu-hoa-nhiet-cho-cau-truc-in-3d\/","title":{"rendered":"T\u1ed1i \u01b0u h\u00f3a nhi\u1ec7t cho c\u1ea5u tr\u00fac in 3D"},"content":{"rendered":"<p class=\"sidekick\">T\u1ed1i \u01b0u h\u00f3a nhi\u1ec7t cho c\u1ea5u tr\u00fac in 3D: Ph\u00e2n t\u00edch s\u1ef1 qu\u1ea3n l\u00fd nhi\u1ec7t, c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a c\u00e1c c\u1ea5u tr\u00fac in 3D b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p k\u1ef9 thu\u1eadt nhi\u1ec7t ti\u00ean ti\u1ebfn.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/toi_uu_hoa_nhiet_cho_cau_truc_in_3d.png\" alt=\"T\u1ed1i \u01b0u h\u00f3a nhi\u1ec7t cho c\u1ea5u tr\u00fac in 3D\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>T\u1ed1i \u01b0u h\u00f3a nhi\u1ec7t cho c\u1ea5u tr\u00fac in 3D<\/h2>\n<p>Trong ng\u00e0nh c\u00f4ng nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i, c\u00f4ng ngh\u1ec7 in 3D \u0111ang ng\u00e0y c\u00e0ng tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn v\u00e0 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c t\u1eeb y t\u1ebf, \u00f4 t\u00f4, \u0111\u1ebfn h\u00e0ng kh\u00f4ng. M\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 t\u00ednh n\u0103ng c\u1ee7a s\u1ea3n ph\u1ea9m in 3D l\u00e0 qu\u1ea3n l\u00fd nhi\u1ec7t \u0111\u1ed9 trong qu\u00e1 tr\u00ecnh in. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u1edbi thi\u1ec7u m\u1ed9t s\u1ed1 k\u1ef9 thu\u1eadt t\u1ed1i \u01b0u h\u00f3a nhi\u1ec7t \u0111\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a c\u00e1c c\u1ea5u tr\u00fac in 3D.<\/p>\n<h2>1. Qu\u1ea3n l\u00fd nhi\u1ec7t \u0111\u1ed9 trong qu\u00e1 tr\u00ecnh in 3D<\/h2>\n<p>Trong qu\u00e1 tr\u00ecnh in 3D, nhi\u1ec7t \u0111\u1ed9 c\u1ee7a v\u1eadt li\u1ec7u in v\u00e0 m\u00f4i tr\u01b0\u1eddng xung quanh \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng. Nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng \u1ed5n \u0111\u1ecbnh c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng co ng\u00f3t, n\u1ee9t g\u00e3y, ho\u1eb7c l\u00e0m gi\u1ea3m t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a s\u1ea3n ph\u1ea9m in. \u0110\u1ec3 t\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh n\u00e0y, c\u1ea7n ph\u1ea3i ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c c\u00e1c y\u1ebfu t\u1ed1 sau:<\/p>\n<ul>\n<li>Nhi\u1ec7t \u0111\u1ed9 c\u1ee7a \u0111\u1ea7u in<\/li>\n<li>Nhi\u1ec7t \u0111\u1ed9 c\u1ee7a b\u00e0n in<\/li>\n<li>Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng xung quanh<\/li>\n<\/ul>\n<h2>2. Ph\u01b0\u01a1ng ph\u00e1p l\u00e0m m\u00e1t v\u00e0 gia nhi\u1ec7t<\/h2>\n<p>\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o nhi\u1ec7t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p l\u00e0m m\u00e1t v\u00e0 gia nhi\u1ec7t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong c\u00e1c m\u00e1y in 3D. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p:<\/p>\n<ul>\n<li><strong>H\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t b\u1eb1ng kh\u00f4ng kh\u00ed:<\/strong> \u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 th\u1ef1c hi\u1ec7n nh\u1ea5t. Qu\u1ea1t gi\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ed5i kh\u00f4ng kh\u00ed m\u00e1t v\u00e0o v\u00f9ng in, gi\u00fap gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 nhanh ch\u00f3ng.<\/li>\n<li><strong>H\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t b\u1eb1ng n\u01b0\u1edbc:<\/strong> Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y ph\u1ee9c t\u1ea1p h\u01a1n nh\u01b0ng hi\u1ec7u qu\u1ea3 h\u01a1n, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u nhi\u1ec7t \u0111\u1ed9 th\u1ea5p. N\u01b0\u1edbc \u0111\u01b0\u1ee3c b\u01a1m qua c\u00e1c \u1ed1ng d\u1eabn \u0111\u1ec3 l\u00e0m m\u00e1t c\u00e1c b\u1ed9 ph\u1eadn c\u1ea7n thi\u1ebft.<\/li>\n<li><strong>Gia nhi\u1ec7t b\u1eb1ng \u0111i\u1ec7n:<\/strong> \u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 c\u1ee7a b\u00e0n in v\u00e0 \u0111\u1ea7u in. C\u00e1c b\u1ed9 gia nhi\u1ec7t \u0111i\u1ec7n (heaters) \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p b\u00ean trong c\u00e1c b\u1ed9 ph\u1eadn n\u00e0y \u0111\u1ec3 duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh.<\/li>\n<\/ul>\n<h2>3. T\u00ednh to\u00e1n t\u1ed1i \u01b0u h\u00f3a nhi\u1ec7t<\/h2>\n<p>\u0110\u1ec3 t\u1ed1i \u01b0u h\u00f3a nhi\u1ec7t \u0111\u1ed9 cho qu\u00e1 tr\u00ecnh in 3D, c\u1ea7n ph\u1ea3i th\u1ef1c hi\u1ec7n c\u00e1c t\u00ednh to\u00e1n ch\u00ednh x\u00e1c. M\u1ed9t trong s\u1ed1 \u0111\u00f3 l\u00e0 t\u00ednh to\u00e1n h\u1ec7 s\u1ed1 truy\u1ec1n nhi\u1ec7t (thermal conductivity) v\u00e0 h\u1ec7 s\u1ed1 khu\u1ebfch t\u00e1n nhi\u1ec7t (thermal diffusivity).<\/p>\n<p>H\u1ec7 s\u1ed1 truy\u1ec1n nhi\u1ec7t \\( k \\) \u0111o l\u01b0\u1eddng kh\u1ea3 n\u0103ng d\u1eabn nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u v\u00e0 \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c:<\/p>\n<p>\\[<br \/>\nk = \\frac{\\text{Q} \\times \\text{d}}{\\text{A} \\times \\Delta \\text{T}}<br \/>\n\\]\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li><strong>Q:<\/strong> Nhi\u1ec7t l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c truy\u1ec1n qua v\u1eadt li\u1ec7u (W)<\/li>\n<li><strong>d:<\/strong> \u0110\u1ed9 d\u00e0y c\u1ee7a v\u1eadt li\u1ec7u (m)<\/li>\n<li><strong>A:<\/strong> Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t truy\u1ec1n nhi\u1ec7t (m<sup>2<\/sup>)<\/li>\n<li><strong>\\(\\Delta \\text{T}\\):<\/strong> Ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa hai m\u1eb7t c\u1ee7a v\u1eadt li\u1ec7u (K)<\/li>\n<\/ul>\n<p>H\u1ec7 s\u1ed1 khu\u1ebfch t\u00e1n nhi\u1ec7t \\( \\alpha \\) \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c:<\/p>\n<p>\\[<br \/>\n\\alpha = \\frac{k}{\\rho \\times c_p}<br \/>\n\\]\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li><strong>k:<\/strong> H\u1ec7 s\u1ed1 truy\u1ec1n nhi\u1ec7t (W\/mK)<\/li>\n<li><strong>\\(\\rho\\):<\/strong> M\u1eadt \u0111\u1ed9 v\u1eadt li\u1ec7u (kg\/m<sup>3<\/sup>)<\/li>\n<li><strong>c_p:<\/strong> Nhi\u1ec7t dung ri\u00eang (J\/kgK)<\/li>\n<\/ul>\n<h2>4. K\u1ebft lu\u1eadn<\/h2>\n<p>T\u1ed1i \u01b0u h\u00f3a nhi\u1ec7t trong qu\u00e1 tr\u00ecnh in 3D kh\u00f4ng ch\u1ec9 c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m m\u00e0 c\u00f2n t\u0103ng hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a m\u00e1y in. Vi\u1ec7c ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 th\u00f4ng qua c\u00e1c ph\u01b0\u01a1ng ph\u00e1p l\u00e0m m\u00e1t v\u00e0 gia nhi\u1ec7t, c\u00f9ng v\u1edbi vi\u1ec7c t\u00ednh to\u00e1n ch\u00ednh x\u00e1c c\u00e1c h\u1ec7 s\u1ed1 truy\u1ec1n v\u00e0 khu\u1ebfch t\u00e1n nhi\u1ec7t, l\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng gi\u00fap n\u00e2ng cao hi\u1ec7u qu\u1ea3 c\u1ee7a c\u00f4ng ngh\u1ec7 in 3D.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>T\u1ed1i \u01b0u h\u00f3a nhi\u1ec7t cho c\u1ea5u tr\u00fac in 3D: Ph\u00e2n t\u00edch s\u1ef1 qu\u1ea3n l\u00fd nhi\u1ec7t, c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a c\u00e1c c\u1ea5u tr\u00fac in 3D b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p k\u1ef9 thu\u1eadt nhi\u1ec7t ti\u00ean ti\u1ebfn.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[132],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>T\u1ed1i \u01b0u h\u00f3a nhi\u1ec7t cho c\u1ea5u tr\u00fac in 3D<\/title>\n<meta name=\"description\" content=\"T\u1ed1i \u01b0u h\u00f3a nhi\u1ec7t cho c\u1ea5u tr\u00fac in 3D: Ph\u00e2n t\u00edch s\u1ef1 qu\u1ea3n l\u00fd nhi\u1ec7t, c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a c\u00e1c c\u1ea5u tr\u00fac in 3D b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p k\u1ef9 thu\u1eadt nhi\u1ec7t ti\u00ean ti\u1ebfn.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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