{"id":3859,"date":"2026-06-11T07:20:22","date_gmt":"2026-06-11T07:20:22","guid":{"rendered":"https:\/\/nbaem.com\/?p=3859"},"modified":"2026-05-27T08:36:46","modified_gmt":"2026-05-27T08:36:46","slug":"can-you-drill-magnets","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/can-you-drill-magnets\/","title":{"rendered":"B\u1ea1n c\u00f3 th\u1ec3 khoan nam ch\u00e2m theo ph\u01b0\u01a1ng ph\u00e1p an to\u00e0n, r\u1ee7i ro v\u00e0 c\u00e1c ph\u01b0\u01a1ng \u00e1n thay th\u1ebf"},"content":{"rendered":"<h2>Khoa h\u1ecdc v\u1eadt li\u1ec7u: T\u1ea1i sao nam ch\u00e2m kh\u00e1ng c\u1ef1 vi\u1ec7c khoan th\u00f4ng th\u01b0\u1eddng<\/h2>\n<p>B\u1ea1n c\u00f3 th\u1ec3 khoan nam ch\u00e2m b\u1eb1ng c\u00e1c d\u1ee5ng c\u1ee5 ph\u1ed5 th\u00f4ng hay kh\u00f4ng? \u0110\u00f3 l\u00e0 c\u00e2u h\u1ecfi ch\u00fang t\u00f4i nh\u1eadn \u0111\u01b0\u1ee3c li\u00ean t\u1ee5c t\u1eeb ng\u01b0\u1eddi t\u1ef1 l\u00e0m v\u00e0 k\u1ef9 s\u01b0. C\u00e2u tr\u1ea3 l\u1eddi ng\u1eafn g\u1ecdn l\u00e0 kh\u00f4ng, v\u00e0 \u00e9p m\u1ed9t m\u0169i khoan ti\u00eau chu\u1ea9n v\u00e0o m\u1ed9t nam ch\u00e2m \u0111\u00e3 ho\u00e0n thi\u1ec7n th\u01b0\u1eddng k\u1ebft th\u00fac b\u1eb1ng th\u1ea3m h\u1ecda. \u0110\u1ec3 hi\u1ec3u t\u1ea1i sao, ch\u00fang ta ph\u1ea3i xem x\u00e9t th\u1ef1c s\u1ef1 nh\u1eefng v\u1eadt li\u1ec7u n\u00e0y \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb g\u00ec.<\/p>\n<h3>Kh\u00f4ng ph\u1ea3i th\u00e9p r\u1eafn: Nh\u1eadn th\u1ee9c sai ph\u1ed5 bi\u1ebfn<\/h3>\n<p>Nhi\u1ec1u ng\u01b0\u1eddi cho r\u1eb1ng do nam ch\u00e2m c\u1ea3m th\u1ea5y n\u1eb7ng v\u00e0 tr\u00f4ng c\u00f3 t\u00ednh kim lo\u1ea1i, ch\u00fang c\u00f3 c\u00f9ng c\u1ea5u tr\u00fac nh\u01b0 th\u00e9p r\u1eafn. H\u1ecd kh\u00f4ng c\u00f3 nh\u01b0 v\u1eady. Th\u00e9p c\u00f3 t\u00ednh d\u1ebbo v\u00e0 c\u00f3 th\u1ec3 bong ra th\u00e0nh nh\u1eefng cu\u1ed9n s\u1ea1ch khi khoan. Nam ch\u00e2m v\u0129nh vi\u1ec5n, tuy nhi\u00ean, kh\u00f4ng ph\u1ea3i l\u00e0 kh\u1ed1i kim lo\u1ea1i r\u1eafn. Ch\u00fang \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1eb1ng m\u1ed9t qu\u00e1 tr\u00ecnh g\u1ecdi l\u00e0 sinter h\u00f3a, n\u01a1i c\u00e1c h\u1ee3p kim b\u1ed9t \u0111\u01b0\u1ee3c n\u00e9n d\u01b0\u1edbi \u00e1p l\u1ef1c l\u1edbn v\u00e0 k\u1ebft d\u00ednh v\u1edbi nhau b\u1eb1ng nhi\u1ec7t.<\/p>\n<p>V\u1ec1 m\u1eb7t c\u1ea5u tr\u00fac, m\u1ed9t nam ch\u00e2m ho\u00e0n thi\u1ec7n ho\u1ea1t \u0111\u1ed9ng gi\u1ed1ng m\u1ed9t chi\u1ebfc c\u1ed1c c\u00e0 ph\u00ea ho\u1eb7c m\u1ed9t vi\u00ean g\u1ea1ch g\u1ed1m h\u01a1n l\u00e0 m\u1ed9t m\u1ea9u th\u00e9p. Khi b\u1ea1n nh\u1ea5n m\u1ed9t m\u0169i khoan ti\u00eau chu\u1ea9n v\u00e0o ch\u00fang, ch\u00fang kh\u00f4ng c\u1eaft m\u00e0 s\u1ebd v\u1ee1 v\u1ee5n.<\/p>\n<h3>C\u00e1c t\u00ednh ch\u1ea5t c\u1ed1t l\u00f5i c\u1ee7a c\u00e1c lo\u1ea1i nam ch\u00e2m ch\u00ednh<\/h3>\n<p>C\u00e1c th\u00e0nh ph\u1ea7n nam ch\u00e2m kh\u00e1c nhau ph\u1ea3n \u1ee9ng m\u1ed9t c\u00e1ch \u0111\u1ed9c \u0111\u00e1o v\u1edbi \u00e1p l\u1ef1c c\u01a1 h\u1ecdc, nh\u01b0ng kh\u00f4ng lo\u1ea1i n\u00e0o ch\u1ecbu khoan ti\u00eau chu\u1ea9n t\u1ed1t.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Lo\u1ea1i nam ch\u00e2m<\/th>\n<th style=\"text-align: left;\">\u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh<\/th>\n<th style=\"text-align: left;\">Ph\u1ea3n \u1ee9ng v\u1edbi vi\u1ec7c khoan<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>Nam ch\u00e2m Neodymium (NdFeB)<\/strong><\/td>\n<td style=\"text-align: left;\">L\u1ef1c t\u1eeb c\u1ef1c k\u1ef3 m\u1ea1nh, m\u1eadt \u0111\u1ed9 n\u0103ng l\u01b0\u1ee3ng cao<\/td>\n<td style=\"text-align: left;\"><strong>R\u1ea5t gi\u00f2n.<\/strong> D\u1ec5 v\u1ee1 d\u01b0\u1edbi \u00e1p l\u1ef1c c\u01a1 h\u1ecdc.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Ferrite \/ Ceramic<\/strong><\/td>\n<td style=\"text-align: left;\">Chi ph\u00ed th\u1ea5p, \u0111\u1ed9 b\u1ec1n \u0103n m\u1ec9n ch\u1ed1ng \u0103n m corrosion<\/td>\n<td style=\"text-align: left;\"><strong>R\u1ea5t d\u1ec5 n\u1ee9t\u88c2.<\/strong> H\u00e0nh x\u1eed nh\u01b0 g\u1ed1m s\u00e0nh gi\u00f2n.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Cobalt Samari (SmCo)<\/strong><\/td>\n<td style=\"text-align: left;\">Nhi\u1ec7t \u0111\u1ed9 gi\u1edbi h\u1ea1n cao, \u1ed5n \u0111\u1ecbnh cao c\u1ea5p<\/td>\n<td style=\"text-align: left;\"><strong>C\u1ee9ng c\u01a1 h\u1ecdc.<\/strong> V\u1ee1 v\u00e0 n\u1ee9t ch\u1ec9 sau m\u1ed9t l\u00e1t.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Alnico<\/strong><\/td>\n<td style=\"text-align: left;\">\u1ed4n \u0111\u1ecbnh nhi\u1ec7t tuy\u1ec7t v\u1eddi, l\u00e0m t\u1eeb nh\u00f4m, Nickel v\u00e0 coban<\/td>\n<td style=\"text-align: left;\"><strong>Qu\u00e1 c\u1ee9ng \u0111\u1ed1i v\u1edbi c\u00e1c m\u0169i khoan ti\u00eau chu\u1ea9n.<\/strong> Y\u00eau c\u1ea7u d\u1ee5ng c\u1ee5 c\u00f4ng nghi\u1ec7p chuy\u00ean bi\u1ec7t.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>NdFeB (Neo-dia) Neodymium: L\u1ef1c tuy\u1ec7t v\u1eddi, Gi\u00f2n c\u1ef1c \u0111oan<\/h3>\n<p>Nam ch\u00e2m neodymium l\u00e0 nam ch\u00e2m v\u0129nh c\u1eedu m\u1ea1nh nh\u1ea5t tr\u00ean to\u00e0n c\u1ea7u, nh\u01b0ng s\u1ee9c m\u1ea1nh v\u1eadt l\u00fd c\u1ee7a ch\u00fang kh\u00f4ng t\u01b0\u01a1ng x\u1ee9ng v\u1edbi s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng c\u1ee7a ch\u00fang. B\u1ed9t nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm sintered r\u1ea5t gi\u00f2n. Ngay khi m\u1ed9t m\u0169i khoan ti\u00eau chu\u1ea9n ch\u1ea1m v\u00e0o v\u1eadt li\u1ec7u, c\u0103ng th\u1eb3ng c\u1ee5c b\u1ed9 g\u00e2y ra c\u00e1c v\u1ebft n\u1ee9t vi m\u00f4 lan r\u1ed9ng nhanh ch\u00f3ng qua to\u00e0n b\u1ed9 nam ch\u00e2m, khi\u1ebfn n\u00f3 b\u1ecb ph\u00e1 v\u1ee1 ho\u00e0n to\u00e0n.<\/p>\n<h3>S\u1eaft t\u1eeb \/ Ceramic: Chi ph\u00ed th\u1ea5p, d\u1ec5 g\u00e3y<\/h3>\n<p>Nam ch\u00e2m ferrite sintered \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i v\u00ec t\u00ednh kinh t\u1ebf v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n. Tuy nhi\u00ean, v\u00ec ch\u00fang c\u01a1 b\u1ea3n l\u00e0 g\u1ed1m, n\u00ean ch\u00fang c\u00f3 \u0111\u1ed9 linh ho\u1ea1t b\u1eb1ng kh\u00f4ng. C\u1ed1 g\u1eafng khoan ch\u00fang b\u1eb1ng m\u0169i khoan c\u1eaft kim lo\u1ea1i ti\u00eau chu\u1ea9n s\u1ebd g\u00e2y n\u1ee9t v\u1ee1 v\u1eadt li\u1ec7u ngay l\u1eadp t\u1ee9c.<\/p>\n<h3>Samarium Cobalt (SmCo) &amp; Alnico: Gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 cao, C\u1ee9ng c\u01a1 h\u1ecdc<\/h3>\n<p>C\u1ea3 nam ch\u00e2m Samarium Cobalt v\u00e0 Alnico \u0111\u1ec1u v\u01b0\u1ee3t tr\u1ed9i trong c\u00e1c m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p chuy\u00ean d\u1ee5ng c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao. Nh\u01b0ng gi\u1ed1ng nh\u01b0 neodymium, SmCo l\u00e0 h\u1ee3p kim \u0111\u1ea5t hi\u1ebfm thi\u1ebfu t\u00ednh \u0111\u00e0n h\u1ed3i structurally. Trong khi Alnico k\u00e9m d\u1ec5 b\u1ecb nghi\u1ec1n h\u01a1n so v\u1edbi g\u1ed1m, n\u00f3 c\u1ef1c k\u1ef3 c\u1ee9ng\u2014th\u01b0\u1eddng c\u1ee9ng h\u01a1n m\u0169i khoan ti\u00eau chu\u1ea9n c\u00f3 trong x\u01b0\u1edfng \u0111i\u1ec3n h\u00ecnh, khi\u1ebfn m\u0169i khoan b\u1ecb c\u00f9n ngay l\u1eadp t\u1ee9c m\u00e0 kh\u00f4ng \u0111\u1ec3 l\u1ea1i v\u1ebft l\u00f5m.<\/p>\n<h2>4 nguy c\u01a1 \u1ea9n khi khoan m\u1ed9t nam ch\u00e2m ho\u00e0n thi\u1ec7n<\/h2>\n<p>L\u1ea5y m\u1ed9t m\u0169i khoan ti\u00eau chu\u1ea9n khoan m\u1ed9t nam ch\u00e2m v\u0129nh c\u1eedu \u0111\u00e3 ho\u00e0n thi\u1ec7n l\u00e0 c\u00f4ng th\u1ee9c cho th\u1ea3m h\u1ecda. N\u1ebfu b\u1ea1n c\u1ed1 g\u1eafng <strong>k\u00e9t nam ch\u00e2m drill<\/strong> sau khi ch\u00fang \u0111\u00e3 \u0111\u01b0\u1ee3c nam ch\u00e2m h\u00f3a v\u00e0 ph\u1ee7, b\u1ea1n g\u1eb7p ph\u1ea3i c\u00e1c r\u00e0o c\u1ea3n v\u1eadt l\u00fd v\u00e0 h\u00f3a h\u1ecdc nghi\u00eam tr\u1ecdng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ed1n m\u1ed1i nguy \u1ea9n b\u1ea1n s\u1ebd \u0111\u1ed1i m\u1eb7t:<\/p>\n<h3>1. \u0110 demagnetization nhi\u1ec7t (Nhi\u1ec7t l\u00e0m h\u1ecfng nam ch\u00e2m)<\/h3>\n<p>Ma s\u00e1t khi khoan t\u1ea1o ra nhi\u1ec7t c\u1ee5c b\u1ed9 m\u1ea1nh t\u1ea1i \u0111i\u1ec3m ti\u1ebfp x\u00fac. L\u01b0\u1ee3ng nhi\u1ec7t n\u00e0y c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u0111\u1ea9y v\u1eadt li\u1ec7u v\u01b0\u1ee3t qu\u00e1 nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh t\u1ed1i \u0111a ho\u1eb7c th\u1eadm ch\u00ed v\u01b0\u1ee3t qu\u00e1 <strong>nhi\u1ec7t \u0111\u1ed9 Curie<\/strong>. Khi \u0111i\u1ec1u n\u00e0y x\u1ea3y ra, c\u00e1c mi\u1ec1n t\u1eeb b\u1ecb c\u0103n ch\u1ec9nh l\u1ea1i v\u0129nh vi\u1ec5n, v\u00e0 b\u1ea1n s\u1ebd c\u00f3 m\u1ed9t kh\u1ed1i kim lo\u1ea1i ch\u1ebft v\u00f4 d\u1ee5ng.<\/p>\n<h3>2. B\u1ee5i d\u1ec5 ch\u00e1y &amp; r\u1ee7i ro ch\u00e1y n\u1ed5 nghi\u00eam tr\u1ecdng<\/h3>\n<p>Khi b\u1ea1n khoan v\u00e0o m\u1ed9t nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm sintered, b\u1ea1n s\u1ebd t\u1ea1o ra m\u1ed9t b\u1ee5i t\u1eeb nh\u1ecf <strong>b\u1ee5i t\u1eeb d\u1ec5 ch\u00e1y<\/strong>. C\u00e1c v\u1eadt li\u1ec7u nh\u01b0 neodymium c\u00f3 t\u00ednh ch\u00e1y r\u1ea5t cao. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 c\u00e1c h\u1ea1t li ti bay trong kh\u00f4ng kh\u00ed v\u00e0 ph\u00f4i kim c\u00f3 th\u1ec3 t\u1ef1 b\u1ed1c ch\u00e1y trong kh\u00f4ng kh\u00ed ho\u1eb7c ph\u00e1t tia l\u1eeda d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 c\u1ee7a m\u0169i khoan, t\u1ea1o th\u00e0nh nguy c\u01a1 ch\u00e1y l\u1edbn trong khu v\u1ef1c l\u00e0m vi\u1ec7c c\u1ee7a b\u1ea1n.<\/p>\n<h3>3. Ph\u00e1 h\u1ecfng l\u1edbp b\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n<\/h3>\n<p>H\u1ea7u h\u1ebft c\u00e1c nam ch\u00e2m c\u00f3 l\u1ef1c t\u1eeb cao d\u1ef1a v\u00e0o m\u1ed9t l\u1edbp kh\u00f3a chuy\u00ean d\u1ee5ng <strong>L\u1edbp ph\u1ee7 Nickel-Copper-Nickel (Ni-Cu-Ni)<\/strong> \u0111\u1ec3 ni\u00eam phong h\u1ee3p kim th\u00f4 b\u00ean trong kh\u1ecfi \u0111\u1ed9 \u1ea9m. Vi\u1ec7c khoan c\u1eaft xuy\u00ean qua l\u1edbp b\u1ea3o v\u1ec7 n\u00e0y. Khi v\u1eadt li\u1ec7u b\u00ean trong th\u00f4 b\u1ecb ti\u1ebfp x\u00fac v\u1edbi oxy v\u00e0 \u0111\u1ed9 \u1ea9m, qu\u00e1 tr\u00ecnh oxy h\u00f3a nhanh ch\u00f3ng chi\u1ebfm \u01b0u th\u1ebf, khi\u1ebfn nam ch\u00e2m b\u1ecb g\u1ec9, suy gi\u1ea3m v\u00e0 d\u1ea7n b\u1ecb v\u1ee1 c\u1ea5u tr\u00fac theo th\u1eddi gian.<\/p>\n<h3>4. V\u1ee1 v\u1ee5n c\u01a1 h\u1ecdc<\/h3>\n<p>Nam ch\u00e2m kh\u00f4ng gi\u1ed1ng th\u00e9p r\u1eafn; ch\u00fang c\u00f3 ma tr\u1eadn d\u1ea1ng g\u1ed1m d\u1ec5 v\u1ee1. C\u00e1c l\u1ef1c c\u01a1 h\u1ecdc kh\u1eafc nghi\u1ec7t, rung \u0111\u1ed9ng v\u00e0 m\u00f4-men xo\u1eafn c\u1ee7a m\u1ed9t m\u00e1y khoan ti\u00eau chu\u1ea9n s\u1ebd g\u00e2y ra <strong>v\u1ee1 v\u1eadt li\u1ec7u gi\u00f2n<\/strong>. Thay v\u00ec m\u1ed9t l\u1ed7 s\u1ea1ch, nam ch\u00e2m c\u00f3 kh\u1ea3 n\u0103ng cao s\u1ebd n\u1ed5 tung th\u00e0nh c\u00e1c m\u1ea3nh s\u1eafc nh\u1ecdn, nguy hi\u1ec3m bay ra.<\/p>\n<blockquote><p><strong>L\u01b0u \u00fd Quan tr\u1ecdng:<\/strong> Do nh\u1eefng r\u1ee7i ro nghi\u00eam tr\u1ecdng n\u00e0y, <a href=\"https:\/\/nbaem.com\/vi\/magnet-machining\/\">gia c\u00f4ng nam ch\u00e2m<\/a> vi\u1ec7c th\u1ef1c hi\u1ec7n lu\u00f4n \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh d\u01b0\u1edbi \u0111i\u1ec1u ki\u1ec7n ph\u00f2ng th\u00ed nghi\u1ec7m nghi\u00eam ng\u1eb7t b\u1eb1ng d\u1ee5ng c\u1ee5 chuy\u00ean d\u1ee5ng tr\u01b0\u1edbc khi v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c nam ch\u00e2m h\u00f3a.<\/p><\/blockquote>\n<h2>Giai \u0111o\u1ea1n C\u1ea5p c\u1ee9u: C\u00e1ch Khoan Nam ch\u00e2m An to\u00e0n<\/h2>\n<p>N\u1ebfu b\u1ea1n r\u01a1i v\u00e0o t\u00ecnh hu\u1ed1ng b\u1eaft bu\u1ed9c ph\u1ea3i ch\u1ec9nh s\u1eeda m\u1ed9t nam ch\u00e2m \u0111\u00e3 ho\u00e0n thi\u1ec7n, b\u1ea1n kh\u00f4ng th\u1ec3 xem n\u00f3 nh\u01b0 th\u00e9p th\u00f4ng th\u01b0\u1eddng. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p DIY ti\u00eau chu\u1ea9n s\u1ebd ph\u00e1 h\u1ee7y nam ch\u00e2m v\u00e0 t\u1ea1o ra c\u00e1c nguy c\u01a1 an to\u00e0n nghi\u00eam tr\u1ecdng. Khi c\u00e1c gi\u1ea3i ph\u00e1p c\u00f4ng nghi\u1ec7p <a href=\"https:\/\/nbaem.com\/vi\/magnet-machining\/\">gia c\u00f4ng nam ch\u00e2m<\/a> kh\u00f4ng th\u1ec3 ti\u1ebfp c\u1eadn, b\u1ea1n ph\u1ea3i tu\u00e2n th\u1ee7 m\u1ed9t quy tr\u00ecnh c\u1ea5p c\u1ee9u nghi\u00eam ng\u1eb7t \u0111\u1ec3 ho\u00e0n th\u00e0nh c\u00f4ng vi\u1ec7c an to\u00e0n.<\/p>\n<h3>Y\u00eau c\u1ea7u C\u00f4ng c\u1ee5 c\u1ef1c k\u1ef3 quan tr\u1ecdng<\/h3>\n<p>H\u00e3y qu\u00ean c\u00e1c m\u0169i khoan th\u00e9p t\u1ed1c \u0111\u1ed9 cao th\u00f4ng th\u01b0\u1eddng (HSS). Ch\u00fang s\u1ebd m\u00f2n ngay l\u1eadp t\u1ee9c ho\u1eb7c l\u00e0m v\u1ee1 v\u1eadt li\u1ec7u. B\u1ea1n ph\u1ea3i s\u1eed d\u1ee5ng d\u1ee5ng c\u1ee5 chuy\u00ean d\u1ee5ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 m\u00e0i xuy\u00ean qua c\u00e1c ma tr\u1eadn c\u1ee9ng, gi\u00f2n:<\/p>\n<ul>\n<li><strong>M\u0169i khoan ph\u1ee7 kim c\u01b0\u01a1ng:<\/strong> L\u1ef1a ch\u1ecdn tuy\u1ec7t v\u1eddi nh\u1ea5t. Ch\u00fang m\u00e0i m\u00f2n v\u1eadt li\u1ec7u thay v\u00ec c\u1eaft, gi\u1ea3m thi\u1ec3u n\u1ee9t v\u1ee1 vi m\u00f4.<\/li>\n<li><strong>M\u0169i khoan carbide r\u1eafn:<\/strong> M\u1ed9t s\u1ef1 thay th\u1ebf kh\u1ea3 thi, nh\u01b0ng ch\u00fang ph\u1ea3i \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng cho v\u1eadt li\u1ec7u c\u1ef1c k\u1ef3 c\u1ee9ng v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi s\u1ef1 c\u1ea9n th\u1eadn t\u1ed1i \u0111a.<\/li>\n<\/ul>\n<hr \/>\n<h3>H\u01b0\u1edbng d\u1eabn gia c\u00f4ng t\u1eebng b\u01b0\u1edbc<\/h3>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">B\u01b0\u1edbc<\/th>\n<th style=\"text-align: left;\">H\u00e0nh \u0111\u1ed9ng<\/th>\n<th style=\"text-align: left;\">Y\u00eau c\u1ea7u quan tr\u1ecdng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>1. G\u1eafn \u043f\u043b\u0430\u043d\u0448\u1ed1 \u0111\u1ecbnh ch\u1eb7t ch\u1ebd<\/strong><\/td>\n<td style=\"text-align: left;\">Xi\u1ebft nam ch\u00e2m v\u00e0o c\u1ed1 \u0111\u1ecbnh ch\u1eafc ch\u1eafn trong m\u1ed9t k\u1eb9p n\u1eb7ng ho\u1eb7c jig t\u00f9y ch\u1ec9nh.<\/td>\n<td style=\"text-align: left;\">Ch\u1ea5m d\u1ee9t rung \u0111\u1ed9ng. B\u1ea5t k\u1ef3 chuy\u1ec3n \u0111\u1ed9ng ho\u1eb7c ti\u1ebfng l\u00e1ch t\u00e1ch n\u00e0o c\u0169ng s\u1ebd ngay l\u1eadp t\u1ee9c l\u00e0m v\u1ee1 v\u1eadt li\u1ec7u gi\u00f2n.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>2. L\u00e0m m\u00e1t li\u00ean t\u1ee5c<\/strong><\/td>\n<td style=\"text-align: left;\">H\u1ea1 to\u00e0n b\u1ed9 setup ng\u1eadp trong n\u01b0\u1edbc ho\u1eb7c s\u1eed d\u1ee5ng m\u1ed9t b\u01a1m l\u00e0m m\u00e1t ch\u1ea5t l\u1ecfng li\u00ean t\u1ee5c.<\/td>\n<td style=\"text-align: left;\">Tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng khoan kh\u00f4. L\u1edbp l\u00e0m m\u00e1t ki\u1ec1m ch\u1ebf b\u1ee5i \u0111\u1ed9c h\u1ea1i v\u00e0 d\u1ec5 ch\u00e1y, \u0111\u1ed3ng th\u1eddi ng\u0103n m\u1ea5t t\u1eeb t\u00ednh do nhi\u1ec7t.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>3. Th\u00f4ng s\u1ed1 m\u00e1y<\/strong><\/td>\n<td style=\"text-align: left;\">\u0110\u1eb7t m\u00e1y khoan \u0111\u1ee9ng c\u1ee7a b\u1ea1n \u1edf v\u00f2ng quay th\u1ea5p v\u00e0 m\u00f4-men xo\u1eafn cao. S\u1eed d\u1ee5ng m\u1ed9t <strong>k\u1ef9 thu\u1eadt khoan c\u1ea1m<\/strong> peck drilling.<\/td>\n<td style=\"text-align: left;\">Khoan v\u1edbi t\u1eebng l\u1ea7n nh\u1ecf 1-2 mm, n\u00e2ng m\u0169i khoan th\u01b0\u1eddng xuy\u00ean \u0111\u1ec3 \u0111\u1ea9y b\u1ecf m\u1ea3nh t\u1eeb v\u00e0 cho ph\u00e9p ch\u1ea5t l\u00e0m m\u00e1t lan v\u00e0o l\u1ed7.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>4. X\u1eed l\u00fd sau khoan<\/strong><\/td>\n<td style=\"text-align: left;\">L\u00e0m s\u1ea1ch v\u00e0 l\u00e0m kh\u00f4 l\u1ed7 m\u1ed9t c\u00e1ch k\u1ef9 l\u01b0\u1ee1ng, sau \u0111\u00f3 ngay l\u1eadp t\u1ee9c qu\u00e9t m\u1ed9t l\u1edbp epoxy c\u00f4ng nghi\u1ec7p.<\/td>\n<td style=\"text-align: left;\">H\u1ee3p kim \u0111\u1ea5t hi\u1ebfm th\u00f4 oxi h\u00f3a nhanh. B\u1ea1n ph\u1ea3i ni\u00eam phong l\u1ea1i l\u00f5i exposed ngay l\u1eadp t\u1ee9c \u0111\u1ec3 ng\u0103n ng\u1eeba \u0103n m\u00f2n.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>T\u1ea1i sao S\u1ea3n xu\u1ea5t Nam ch\u00e2m C\u00f4ng nghi\u1ec7p l\u1ea1i kh\u00e1c<\/h2>\n<p>Khi b\u1ea1n mua m\u1ed9t nam ch\u00e2m c\u00f3 l\u1ed7 \u0111\u00e3 \u0111\u01b0\u1ee3c khoan s\u1eb5n, n\u00f3 ch\u01b0a tr\u1ea3i qua qu\u00e1 tr\u00ecnh khoan ti\u00eau chu\u1ea9n t\u1ea1i x\u01b0\u1edfng. T\u1ea1i c\u00e1c c\u01a1 s\u1edf s\u1ea3n xu\u1ea5t c\u1ee7a ch\u00fang t\u00f4i, ch\u00fang t\u00f4i s\u1eed d\u1ee5ng m\u1ed9t quy tr\u00ecnh l\u00e0m vi\u1ec7c ho\u00e0n to\u00e0n kh\u00e1c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh c\u1ea5u tr\u00fac v\u00e0 hi\u1ec7u su\u1ea5t t\u1eeb t\u00ednh t\u1ed1i \u0111a. Th\u1eed khoan m\u1ed9t nam ch\u00e2m v\u0129nh vi\u1ec5n \u0111\u00e3 ho\u00e0n thi\u1ec7n t\u1ea1i nh\u00e0 l\u00e0 r\u1ea5t kh\u00f3 kh\u0103n v\u00ec s\u1ea3n xu\u1ea5t c\u00f4ng nghi\u1ec7p d\u1ef1a tr\u00ean m\u1ed9t chu\u1ed7i quy tr\u00ecnh ch\u00ednh x\u00e1c, nhi\u1ec1u b\u01b0\u1edbc \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n <em>tr\u01b0\u1edbc<\/em> v\u1eadt li\u1ec7u th\u1eadm ch\u00ed c\u00f2n \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb t\u00ednh.<\/p>\n<h3>Gia c\u00f4ng Tr\u01b0\u1edbc khi \u0110\u01b0\u1ee3c l\u00e0m t\u1eeb t\u00ednh<\/h3>\n<p>Ch\u00fang t\u00f4i \u0111\u1ecbnh h\u00ecnh, c\u1eaft v\u00e0 khoan v\u1eadt li\u1ec7u h\u1ee3p kim th\u00f4 trong khi n\u00f3 v\u1eabn \u1edf tr\u1ea1ng th\u00e1i ch\u01b0a \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb t\u00ednh. C\u00e1c kh\u1ed1i \u0111\u1ea5t hi\u1ebfm th\u00f4 an to\u00e0n v\u00e0 d\u1ec5 x\u1eed l\u00fd h\u01a1n nhi\u1ec1u tr\u01b0\u1edbc khi ch\u00fang mang charge t\u1eeb t\u00ednh. Gia c\u00f4ng v\u1eadt li\u1ec7u s\u1edbm ng\u0103n ng\u1eeba m\u1ea3nh v\u1ee5n bay nguy hi\u1ec3m, ng\u0103n b\u1ee5i t\u1eeb t\u00ednh b\u00e1m v\u00e0o m\u00e1y m\u00f3c, v\u00e0 lo\u1ea1i b\u1ecf r\u1ee7i ro m\u1ea5t t\u1eeb t\u00ednh do nhi\u1ec7t trong qu\u00e1 tr\u00ecnh c\u1eaft. \u0110\u1ec3 hi\u1ec3u c\u00e1ch c\u00e1c v\u1eadt li\u1ec7u th\u00f4 n\u00e0y \u0111\u01b0\u1ee3c x\u1eed l\u00fd t\u1eeb \u0111\u1ea7u, b\u1ea1n c\u00f3 th\u1ec3 xem <a href=\"https:\/\/nbaem.com\/vi\/how-to-make-ndfeb-magnet\/\">c\u00e1ch l\u00e0m nam ch\u00e2m NdFeB<\/a> c\u00e1c b\u01b0\u1edbc.<\/p>\n<h3>Qu\u00e1 Tr\u00ecnh M\u1ea1<\/h3>\n<p>L\u1ed7, r\u00e3nh v\u00e0 l\u1ed7 kho\u00e9t m\u1ee1 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf tr\u01b0\u1edbc khi l\u1edbp m\u1ea1 b\u1ea3o v\u1ec7 b\u1eb1ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng. Khi qu\u00e1 tr\u00ecnh \u0111\u1ecbnh h\u00ecnh ho\u00e0n t\u1ea5t, h\u1ee3p kim gia c\u00f4ng th\u00f4 nh\u1eadn l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7\u2014th\u01b0\u1eddng l\u00e0 m\u1ed9t l\u1edbp Ni-Cu-Ni (Nickel-Copper-Nickel) m\u1ea1nh m\u1ebd. L\u1edbp v\u1ecf ngo\u00e0i n\u00e0y ng\u0103n ch\u1eb7n v\u1eadt li\u1ec7u r\u1ea5t ph\u1ea3n \u1ee9ng v\u1edbi h\u01a1i n\u01b0\u1edbc v\u00e0 kh\u00f4ng kh\u00ed.<\/p>\n<p>B\u1ea3ng d\u01b0\u1edbi l\u00e0m n\u1ed5i b\u1eadt s\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa quy tr\u00ecnh c\u00f4ng nghi\u1ec7p \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t c\u1ee7a ch\u00fang t\u00f4i v\u00e0 khoan t\u00f9y \u00fd \u1edf ngo\u00e0i th\u1ecb tr\u01b0\u1eddng:<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Giai \u0111o\u1ea1n S\u1ea3n xu\u1ea5t<\/th>\n<th style=\"text-align: left;\">Quy tr\u00ecnh S\u1ea3n xu\u1ea5t C\u00f4ng nghi\u1ec7p<\/th>\n<th style=\"text-align: left;\">Khoan DIY ngo\u00e0i th\u1ecb tr\u01b0\u1eddng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>T\u00ecnh tr\u1ea1ng T\u1eeb t\u00ednh<\/strong><\/td>\n<td style=\"text-align: left;\">Th\u1ef1c hi\u1ec7n tr\u00ean h\u1ee3p kim th\u00f4 ch\u01b0a t\u1eeb t\u00ednh<\/td>\n<td style=\"text-align: left;\">Th\u1eed nghi\u1ec7m tr\u00ean v\u1eadt li\u1ec7u \u0111\u00e3 t\u1eeb t\u00ednh ho\u00e0n to\u00e0n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>T\u1ea1o l\u1ed7<\/strong><\/td>\n<td style=\"text-align: left;\">\u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf tr\u01b0\u1edbc khi ph\u1ee7 l\u1edbp v\u00e0 magnet h\u00f3a<\/td>\n<td style=\"text-align: left;\">Khoan th\u1eb3ng qua l\u1edbp b\u1ea3o v\u1ec7<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>\u0110\u1ed9 b\u1ec1n k\u1ebft c\u1ea5u<\/strong><\/td>\n<td style=\"text-align: left;\">Kh\u00f4ng micro\u2013n\u1ee9t; s\u1ee9c b\u1ec1n c\u1ea5u tr\u00fac ho\u00e0n h\u1ea3o<\/td>\n<td style=\"text-align: left;\">R\u1ee7i ro cao g\u00e3y v\u1eadt li\u1ec7u d\u1ec5 v\u1ee1<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Ch\u1ed1ng \u0103n m\u00f2n<\/strong><\/td>\n<td style=\"text-align: left;\">100% k\u00edn b\u1eb1ng m\u1ea1 \u0111\u1ed3ng \u0111\u1ec1u<\/td>\n<td style=\"text-align: left;\">Ti\u1ebfp x\u00fac kim lo\u1ea1i b\u00ean trong th\u00f4 v\u1edbi s\u1ef1 oxy h\u00f3a nhanh ch\u00f3ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c l\u1ef1a ch\u1ecdn th\u00f4ng minh h\u01a1n \u0111\u1ec3 t\u1ef1 khoan nam ch\u00e2m c\u1ee7a b\u1ea1n<\/h2>\n<p>H\u00e3y th\u00e0nh th\u1eadt: khoan m\u1ed9t nam ch\u00e2m \u0111\u00e3 ho\u00e0n thi\u1ec7n l\u00e0 c\u00f4ng th\u1ee9c cho th\u1ea3m h\u1ecda. Gi\u1eefa r\u1ee7i ro ch\u00e1y n\u1ed5 v\u00e0 x\u00e1c su\u1ea5t cao l\u00e0m v\u1ee1 v\u1eadt li\u1ec7u c\u1ee7a b\u1ea1n, h\u1ea7u nh\u01b0 lu\u00f4n t\u1ed1t h\u01a1n khi thi\u1ebft k\u1ebf quanh nam ch\u00e2m thay v\u00ec c\u1ed1 g\u1eafng khoan m\u1ed9t l\u1ed7 xuy\u00ean qua n\u00f3. Ch\u00fang t\u00f4i \u0111\u1ec1 xu\u1ea5t nh\u1eefng l\u1ef1a ch\u1ecdn \u1edf m\u1ee9c chuy\u00ean nghi\u1ec7p n\u00e0y \u0111\u1ec3 ho\u00e0n th\u00e0nh c\u00f4ng vi\u1ec7c m\u00e0 kh\u00f4ng c\u00f3 r\u1ee7i ro.<\/p>\n<h3>V\u1ecf v\u00e0 gi\u00e1 \u0111\u1ee1 c\u01a1 h\u1ecdc<\/h3>\n<p>Thay v\u00ec l\u00e0m thay \u0111\u1ed5i nam ch\u00e2m, h\u00e3y s\u1eed d\u1ee5ng <strong>v\u1ecf b\u1ea3o v\u1ec7 c\u01a1 h\u1ecdc<\/strong>. C\u00e1c khung housing t\u00f9y ch\u1ec9nh ho\u1eb7c c\u00e1c gi\u00e1 \u0111\u1ee1 b\u1eb1ng nh\u1ef1a\/ph\u1ea3n quang phi t\u1eeb t\u00ednh c\u00f3 th\u1ec3 c\u1ed1 \u0111\u1ecbnh nam ch\u00e2m chu\u1ea9n \u1edf v\u1ecb tr\u00ed. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y b\u1ea3o v\u1ec7 v\u1eadt li\u1ec7u d\u1ec5 v\u1ee1 kh\u1ecfi va \u0111\u1eadp trong khi cung c\u1ea5p \u0111i\u1ec3m g\u1eafn \u0111\u00e1ng tin c\u1eady cho d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n.<\/p>\n<h3>Li\u00ean k\u1ebft b\u1eb1ng keo c\u00f4ng nghi\u1ec7p<\/h3>\n<p>\u0110\u1ed1i v\u1edbi nhi\u1ec1u \u1ee9ng d\u1ee5ng, m\u1ed9t m\u1ed1i li\u00ean k\u1ebft ch\u1ea5t l\u01b0\u1ee3ng cao v\u01b0\u1ee3t tr\u1ed9i h\u01a1n m\u1ed9t d\u1ee5ng c\u1ee5 v\u00edt c\u01a1 kh\u00ed. <strong>Li\u00ean k\u1ebft b\u1eb1ng keo c\u00f4ng nghi\u1ec7p<\/strong> s\u1eed d\u1ee5ng epoxy c\u1ea5u tr\u00fac chuy\u00ean d\u1ee5ng ho\u1eb7c cyanoacrylates cho ph\u00e9p b\u1ea1n g\u1eafn nam ch\u00e2m v\u00e0o c\u00e1c b\u1ec1 m\u1eb7t kh\u00e1c nhau. \u0110i\u1ec1u n\u00e0y b\u1ea3o to\u00e0n t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a <a href=\"https:\/\/nbaem.com\/vi\/magnetic-anisotropy\/\">\u0111\u1ecbnh h\u01b0\u1edbng t\u1eeb t\u00ednh<\/a> b\u00ean trong v\u1eadt li\u1ec7u, \u0111\u1ea3m b\u1ea3o tr\u01b0\u1eddng t\u1eeb v\u1eabn nh\u1ea5t qu\u00e1n v\u00e0 l\u1edbp ph\u1ee7 v\u1eabn nguy\u00ean v\u1eb9n.<\/p>\n<h3>B\u1ed9 Nam ch\u00e2m ti\u1ec1n ch\u1ebf<\/h3>\n<p>H\u00e3y t\u1ef1 c\u1ee9u kh\u1ecfi s\u1ef1 \u0111au \u0111\u1ea7u b\u1eb1ng c\u00e1ch mua nam ch\u00e2m \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi l\u1ed7 t\u1eeb nh\u00e0 m\u00e1y. Ch\u00fang \u0111\u01b0\u1ee3c gia c\u00f4ng tr\u01b0\u1edbc khi nam ch\u00e2m h\u00f3a v\u00e0 m\u1ea1, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n t\u1ed1i \u0111a.<\/p>\n<ul>\n<li><strong>Nam ch\u00e2m v\u00f2ng:<\/strong> L\u00fd t\u01b0\u1edfng \u0111\u1ec3 tr\u01b0\u1ee3t l\u00ean tr\u00ean c\u00e1c tr\u1ee5c ho\u1eb7c s\u1eed d\u1ee5ng v\u1edbi bu l\u00f4ng \u0111\u1ea7u kh\u00f4ng l\u1ed3i.<\/li>\n<li><strong>Nam ch\u00e2m l\u1ed3i \u0111\u1ea7u:<\/strong> Nh\u1eefng chi\u1ebfc n\u00e0y c\u00f3 l\u1ed7 \u0111\u00e3 khoan tr\u01b0\u1edbc, c\u00f3 vi\u1ec1n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho bu l\u00f4ng \u0111\u1ea7u ph\u1eb3ng \u0111\u1ec3 v\u1eeba kh\u00edt.<\/li>\n<li><strong>B\u1ed9 h\u1ed9p nam ch\u00e2m:<\/strong> Ch\u00fang bao g\u1ed3m m\u1ed9t nam ch\u00e2m \u0111\u01b0\u1ee3c b\u1ecdc trong <strong>c\u1ed1c th\u00e9p b\u1ea3o v\u1ec7<\/strong>. Nhi\u1ec1u lo\u1ea1i c\u00f3 bu l\u00f4ng c\u00f3 ren ho\u1eb7c ren b\u00ean trong, cho ph\u00e9p b\u1ea1n bulong ch\u00fang tr\u1ef1c ti\u1ebfp l\u00ean m\u1ecdi b\u1ec1 m\u1eb7t.<\/li>\n<\/ul>\n<h3>So s\u00e1nh c\u00e1c ph\u01b0\u01a1ng ph\u00e1p g\u1eafn<\/h3>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Ph\u01b0\u01a1ng ph\u00e1p<\/th>\n<th style=\"text-align: left;\">Ph\u00f9 h\u1ee3p cho<\/th>\n<th style=\"text-align: left;\">L\u1ee3i \u00edch<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>B\u1ed9 l\u1eafp gh\u00e9p \u1ed1ng<\/strong><\/td>\n<td style=\"text-align: left;\">G\u1eafn n\u1eb7ng\/si\u00eau t\u1ea3i tr\u1ecdng<\/td>\n<td style=\"text-align: left;\">L\u1ef1c k\u00e9o t\u1ed1i \u0111a v\u00e0 b\u1ea3o v\u1ec7<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Ch\u1ea5t k\u1ebft d\u00ednh<\/strong><\/td>\n<td style=\"text-align: left;\">Th\u1ea9m m\u1ef9 s\u1ea1ch<\/td>\n<td style=\"text-align: left;\">Kh\u00f4ng c\u00f3 \u1ed1c v\u00edt l\u1ed9 ra; profile th\u1ea5p<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Nam ch\u00e2m v\u00f2ng<\/strong><\/td>\n<td style=\"text-align: left;\">B\u1ed9 ghim c\u01a1 kh\u00ed<\/td>\n<td style=\"text-align: left;\">L\u1ed7 c\u0103n ch\u1ec9nh s\u1eb5n s\u00e0ng \u0111\u1ec3 d\u00f9ng<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Gi\u00e1 \u0111\u1ee1<\/strong><\/td>\n<td style=\"text-align: left;\">M\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t<\/td>\n<td style=\"text-align: left;\">D\u1ec5 thay th\u1ebf n\u1ebfu h\u1ecfng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>B\u1eb1ng c\u00e1ch ch\u1ecdn c\u00e1c gi\u1ea3i ph\u00e1p s\u1eb5n c\u00f3 n\u00e0y, b\u1ea1n \u0111\u1ea3m b\u1ea3o nam ch\u00e2m duy tr\u00ec \u0111\u1ea7y \u0111\u1ee7 s\u1ee9c m\u1ea1nh v\u00e0 tr\u00e1nh oxi h\u00f3a nhanh x\u1ea3y ra khi b\u1ea1n ph\u00e1 v\u1ee1 l\u1edbp ch\u1eafn b\u1ea3o v\u1ec7 c\u1ee7a <a href=\"https:\/\/nbaem.com\/vi\/what-are-magnets-made-of\/\">ch\u1ea5t li\u1ec7u c\u1ee7a nam ch\u00e2m<\/a>.<\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/h2>\n<h3>B\u1ea1n c\u00f3 th\u1ec3 khoan m\u1ed9t l\u1ed7 tr\u00ean nam ch\u00e2m neodymium kh\u00f4ng?<\/h3>\n<p>Kh\u00f4ng, b\u1ea1n kh\u00f4ng n\u00ean c\u1ed1 khoan l\u1ed7 tr\u00ean m\u1ed9t nam ch\u00e2m neodymium \u0111\u00e3 gia c\u00f4ng. Nam ch\u00e2m neodymium (NdFeB) \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb m\u1ed9t ma tr\u1eadn b\u1ed9t nung sinter, khi\u1ebfn ch\u00fang r\u1ea5t gi\u00f2n v\u00e0 d\u1ec5 v\u1ee1 d\u01b0\u1edbi \u00e1p l\u1ef1c c\u01a1 h\u1ecdc. H\u01a1n n\u1eefa, vi\u1ec7c khoan s\u1ebd lo\u1ea1i b\u1ecf l\u1edbp b\u1ea3o v\u1ec7 <a href=\"https:\/\/nbaem.com\/vi\/quality-of-neodymium-magnets\/\">L\u1edbp ph\u1ee7 Nickel-Copper-Nickel (Ni-Cu-Ni)<\/a>, \u0111i\u1ec1u n\u00e0y ngay l\u1eadp t\u1ee9c ph\u01a1i b\u00e0y h\u1ee3p kim b\u00ean trong v\u1edbi \u0111\u1ed9 \u1ea9m v\u00e0 oxy h\u00f3a nhanh ch\u00f3ng.<\/p>\n<h3>M\u1ed9t m\u0169i khoan c\u00f3 th\u1ec3 khoan qua nam ch\u00e2m kh\u00f4ng?<\/h3>\n<p>N\u1ebfu vi\u1ec7c khoan l\u00e0 b\u1ea5t \u0111\u1eafc d\u0129, c\u00e1c m\u0169i khoan th\u00e9p ti\u00eau chu\u1ea9n ho\u1eb7c HSS s\u1ebd kh\u00f4ng hi\u1ec7u qu\u1ea3. B\u1ea1n ph\u1ea3i d\u00f9ng m\u0169i khoan chuy\u00ean d\u1ee5ng <strong>m\u0169i khoan ph\u1ee7 kim c\u01b0\u01a1ng<\/strong> ho\u1eb7c \u0111\u1eb7c <strong>m\u0169i khoan carbide<\/strong> k\u1ebft h\u1ee3p v\u1edbi m\u1ed9t h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t d\u1ea1ng l\u1ecfng li\u00ean t\u1ee5c. C\u00e1c lo\u1ea1i m\u0169i ti\u00eau chu\u1ea9n s\u1ebd nhanh ch\u00f3ng b\u1ecb c\u00f9n, l\u00e0m qu\u00e1 nhi\u1ec7t v\u1eadt li\u1ec7u v\u00e0 l\u00e0m n\u1ee9t c\u1ea5u tr\u00fac gi\u00f2n.<\/p>\n<h3>Khoan t\u1eeb t\u00ednh c\u00f3 l\u00e0m n\u00f3 m\u1ea5t s\u1ee9c m\u1ea1nh kh\u00f4ng?<\/h3>\n<p>C\u00f3. \u0110\u1ed9 ma s\u00e1t l\u1edbn sinh ra trong qu\u00e1 tr\u00ecnh khoan t\u1ea1o ra nhi\u1ec7t c\u1ee5c b\u1ed9 c\u00f3 th\u1ec3 easily v\u01b0\u1ee3t qu\u00e1 nhi\u1ec7t \u0111\u1ed9 Curie c\u1ee7a v\u1eadt li\u1ec7u. L\u1ef1c c\u0103ng nhi\u1ec7t n\u00e0y g\u00e2y m\u1ea5t t\u1eeb t\u00ednh m\u1ed9t ph\u1ea7n ho\u1eb7c ho\u00e0n to\u00e0n <a href=\"https:\/\/nbaem.com\/vi\/magnetization-and-demagnetization-for-permanent-magnet\/\">demagnetization cho c\u00e1c nam ch\u00e2m v\u0129nh vi\u1ec5n<\/a>, ph\u00e1 h\u1ecfng s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng v\u0129nh vi\u1ec5n. Th\u00eam v\u00e0o \u0111\u00f3, b\u1ee5i t\u1eeb t\u00ednh d\u1ec5 ch\u00e1y t\u00edch t\u1ee5 l\u00e0m gi\u1ea3m kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a kh\u1ed1i t\u1eeb \u0111\u01b0\u1ee3c t\u1eeb h\u00f3a.<\/p>\n<h3>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 c\u1ed1 \u0111\u1ecbnh m\u1ed9t nam ch\u00e2m m\u00e0 kh\u00f4ng khoan?<\/h3>\n<p>C\u00e1ch an to\u00e0n nh\u1ea5t \u0111\u1ec3 c\u1ed1 \u0111\u1ecbnh nam ch\u00e2m v\u0129nh vi\u1ec5n m\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng k\u1ebft c\u1ea5u l\u00e0 s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p g\u1eafn k\u1ebft thay th\u1ebf:<\/p>\n<ul>\n<li><strong>Nam ch\u00e2m l\u1ed3i \u0111\u1ea7u:<\/strong> Mua nam ch\u00e2m v\u00f2ng ti\u1ec1n ch\u1ebf \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u1ea5p nh\u1eadn \u1ed1c b\u00f4ng \u0111\u1ea7u ph\u1eb3ng.<\/li>\n<li><strong>B\u1ed9 h\u1ed9p nam ch\u00e2m:<\/strong> S\u1eed d\u1ee5ng nam ch\u00e2m \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1eafp s\u1eb5n trong c\u00e1c c\u1ed1c th\u00e9p b\u1ea3o v\u1ec7 c\u00f3 chi ti\u1ebft ren ho\u1eb7c l\u1ed7.<\/li>\n<li><strong>Li\u00ean k\u1ebft b\u1eb1ng keo c\u00f4ng nghi\u1ec7p:<\/strong> \u00c1p d\u1ee5ng epoxies c\u1ea5u tr\u00fac n\u1eb7ng ho\u1eb7c cyanoacrylates \u0111\u01b0\u1ee3c x\u1ebfp lo\u1ea1i cho li\u00ean k\u1ebft kim lo\u1ea1i v\u1edbi kim lo\u1ea1i.<\/li>\n<li><strong>H\u1ed9p c\u01a1 kh\u00ed, v\u1ecf m\u00e1y:<\/strong> X\u00e2y d\u1ef1ng gi\u00e1 \u0111\u1ee1 ho\u1eb7c v\u1ecf ri\u00eang bi\u1ec7t \u0111\u1ec3 gh\u00e9p nam ch\u00e2m v\u00e0o \u0111\u00fang v\u1ecb tr\u00ed m\u1ed9t c\u00e1ch an to\u00e0n.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>B\u1ea1n c\u00f3 th\u1ec3 khoan nam ch\u00e2m Hi\u1ec3u nh\u1eefng r\u1ee7i ro v\u1edbi neodymium v\u00e0 ferrite c\u00e1c b\u01b0\u1edbc khoan an to\u00e0n c\u00f3 dung d\u1ecbch l\u00e0m m\u00e1t v\u00e0 nh\u1eefng l\u1ef1a ch\u1ecdn an to\u00e0n h\u01a1n nam ch\u00e2m v\u00f2ng v\u00f2m ho\u1eb7c nam ch\u00e2m h\u00ecnh ch\u00e9n (\u0111i\u1ec3m khoan ng\u01b0\u1ee3c).<\/p>","protected":false},"author":1,"featured_media":1937,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3859","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/round-magnets-with-hole-and-without-hole.jpg","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3859","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/comments?post=3859"}],"version-history":[{"count":1,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3859\/revisions"}],"predecessor-version":[{"id":3864,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3859\/revisions\/3864"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/1937"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=3859"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=3859"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=3859"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}