{"id":21853,"date":"2024-04-04T08:55:48","date_gmt":"2024-04-04T08:55:48","guid":{"rendered":"https:\/\/ixox.net\/?p=21853"},"modified":"2024-07-19T09:48:36","modified_gmt":"2024-07-19T02:48:36","slug":"do-nham-be-mat-khai-niem-cac-thong-so-tieu-chuan-va-cap-do","status":"publish","type":"post","link":"https:\/\/ixox.net\/do-nham-be-mat-khai-niem-cac-thong-so-tieu-chuan-va-cap-do\/","title":{"rendered":"\u0110\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t: Kh\u00e1i ni\u1ec7m, c\u00e1c th\u00f4ng s\u1ed1, ti\u00eau chu\u1ea9n v\u00e0 c\u1ea5p \u0111\u1ed9"},"content":{"rendered":"

\u0110\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t l\u00e0 m\u1ed9t th\u01b0\u1edbc \u0111o m\u1ee9c \u0111\u1ed9 g\u1ed3 gh\u1ec1 c\u1ee7a b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u, n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c nh\u00ecn nh\u1eadn m\u1ed9t c\u00e1ch ch\u1ee7 quan th\u00f4ng qu\u1ea3 c\u1ea3m nh\u1eadn (x\u00fac gi\u00e1c) c\u1ee7a con ng\u01b0\u1eddi. \u0110\u1ed9 nh\u00e1m c\u00f3 vai tr\u00f2 quan tr\u1ecdng v\u1ec1 m\u1eb7t th\u1ea9m m\u1ef9 c\u1ee7a s\u1ea3n ph\u1ea9m (m\u1ee9c \u0111\u1ed9 b\u00f3ng \u0111\u1eb9p c\u1ee7a b\u1ec1 m\u1eb7t s\u1ea3n ph\u1ea9m), v\u1ec1 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c c\u1ee7a m\u1ed9t v\u1eadt th\u1ec3 v\u1edbi m\u00f4i tr\u01b0\u1eddng (ch\u1eb3ng h\u1ea1n kh\u1ea3 n\u0103ng b\u1ecb \u0103n m\u00f2n) v\u00e0 hi\u1ec7u su\u1ea5t ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ed9t b\u1ed9 ph\u1eadn c\u01a1 kh\u00ed. Trong b\u00e0i vi\u1ebft n\u00e0y, h\u00e3y c\u00f9ng Tinh H\u00e0 t\u00ecm hi\u1ec3u c\u00e1c kh\u00e1i ni\u1ec7m v\u00e0 th\u00f4ng tin li\u00ean quan \u0111\u1ebfn \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u.<\/span><\/p>\n

\"Minh<\/p>\n

\u0110\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t l\u00e0 g\u00ec?<\/b><\/span><\/h2>\n

\u0110\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t (hay g\u1ecdi t\u1eaft l\u00e0 \u0111\u1ed9 nh\u00e1m) l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n c\u1ee7a m\u1ee9c \u0111\u1ed9 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t (k\u1ebft c\u1ea5u b\u1ec1 m\u1eb7t), \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 nh\u1eefng b\u1ea5t th\u01b0\u1eddng v\u1ed1n c\u00f3 trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t. Trong \u0111o l\u01b0\u1eddng, \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t \u0111\u01b0\u1ee3c \u0111\u1ecbnh l\u01b0\u1ee3ng b\u1eb1ng \u0111\u1ed9 l\u1ec7ch theo ph\u01b0\u01a1ng c\u1ee7a vect\u01a1 ph\u00e1p tuy\u1ebfn c\u1ee7a b\u1ec1 m\u1eb7t th\u1ef1c so v\u1edbi d\u1ea1ng l\u00fd t\u01b0\u1edfng c\u1ee7a n\u00f3. B\u1ec1 m\u1eb7t nh\u1eb5n m\u1ecbn khi nh\u1eefng sai l\u1ec7ch n\u00e0y nh\u1ecf v\u00e0 ng\u01b0\u1ee3c l\u1ea1i b\u1ec1 m\u1eb7t g\u1ed3 gh\u1ec1 khi nh\u1eefng sai l\u1ec7ch n\u00e0y l\u1edbn.<\/span><\/p>\n

C\u00e1c th\u00f4ng s\u1ed1 \u0111\u1eb7c tr\u01b0ng trong \u0111o l\u01b0\u1eddng \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t<\/b><\/span><\/h2>\n

\"H\u00ecnh<\/p>\n

C\u00f3 2 th\u00f4ng s\u1ed1 quan tr\u1ecdng v\u00e0 ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ec3 \u0111o l\u01b0\u1eddng v\u00e0 \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 nh\u00e1m c\u1ee7a m\u1ed9t b\u1ec1 m\u1eb7t, \u0111\u00f3 l\u00e0 Ra<\/strong> v\u00e0 Rz<\/strong>.<\/span><\/p>\n

Ra<\/b> – l\u00e0 \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t trung b\u00ecnh – \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng trung b\u00ecnh s\u1ed1 h\u1ecdc c\u00e1c gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i c\u1ee7a \u0111\u1ed9 l\u1ec7ch profin (hi) trong kho\u1ea3ng chi\u1ec1u d\u00e0i chu\u1ea9n L.<\/span><\/p>\n

Rz<\/b> – l\u00e0 chi\u1ec1u cao t\u1ed1i \u0111a trung b\u00ecnh gi\u1eefa c\u00e1c \u0111\u1ec9nh v\u00e0 \u0111\u00e1y – \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng trung b\u00ecnh s\u1ed1 h\u1ecdc c\u00e1c gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i c\u1ee7a 5 \u0111\u1ec9nh cao nh\u1ea5t (ti) v\u00e0 5 \u0111\u00e1y th\u1ea5p nh\u1ea5t (ki) c\u1ee7a profin trong kho\u1ea3ng chi\u1ec1u d\u00e0i chu\u1ea9n L.<\/span><\/p>\n

C\u1ea3 hai th\u00f4ng s\u1ed1 \u0111o \u0111\u1ed9 nh\u00e1m Ra v\u00e0 Rz \u0111\u1ec1u c\u00f3 \u0111\u01a1n v\u1ecb t\u00ednh l\u00e0 micromet (\u00b5m). Trong \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 nh\u00e1m, Ra v\u00e0 Rz \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ri\u00eang bi\u1ec7t, ngh\u0129a l\u00e0 ch\u1ec9 d\u00f9ng m\u1ed9t trong hai th\u00f4ng s\u1ed1 \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 m\u00e0 kh\u00f4ng d\u00f9ng \u0111\u1ed3ng th\u1eddi c\u1ea3 hai. V\u00e0 c\u0169ng kh\u00f4ng c\u00f3 t\u1ef7 l\u1ec7 quy \u0111\u1ed5i \u0111\u1ed9 nh\u00e1m Ra v\u00e0 Rz m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/span><\/p>\n

Ngo\u00e0i ra c\u00f2n c\u00f3 c\u00e1c th\u00f4ng s\u1ed1 \u0111\u1ed9 nh\u00e1m kh\u00e1c \u00edt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng h\u01a1n m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o, bao g\u1ed3m:<\/span><\/p>\n

Rmax<\/b> – chi\u1ec1u cao t\u1ed1i \u0111a c\u1ee7a profin – l\u00e0 kho\u1ea3ng c\u00e1ch theo chi\u1ec1u d\u1ecdc gi\u1eefa \u0111\u1ec9nh cao nh\u1ea5t v\u00e0 \u0111\u00e1y th\u1ea5p nh\u1ea5t c\u1ee7a profin trong kho\u1ea3ng chi\u1ec1u d\u00e0i chu\u1ea9n L. Rmax th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong vi\u1ec7c \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t th\u00f4. \u0110\u01a1n v\u1ecb t\u00ednh l\u00e0 micromet (\u00b5m).<\/span><\/p>\n

Rq<\/b> – \u0111\u1ed9 nh\u1ea5p nh\u00f4 profin – l\u00e0 c\u0103n b\u1eadc hai c\u1ee7a trung b\u00ecnh s\u1ed1 h\u1ecdc c\u00e1c gi\u00e1 tr\u1ecb b\u00ecnh ph\u01b0\u01a1ng \u0111\u1ed9 l\u1ec7ch profin trong kho\u1ea3ng chi\u1ec1u d\u00e0i chu\u1ea9n L. Rq th\u1ec3 hi\u1ec7n c\u1ea3 \u0111\u1ed9 nh\u00e1m v\u00e0 \u0111\u1ed9 g\u1ed3 gh\u1ec1 c\u1ee7a b\u1ec1 m\u1eb7t. \u0110\u01a1n v\u1ecb t\u00ednh l\u00e0 micromet (\u00b5m).<\/span><\/p>\n

Rp<\/b> – \u0111\u1ed9 cao trung b\u00ecnh c\u00e1c \u0111\u1ec9nh – \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng gi\u00e1 tr\u1ecb trung b\u00ecnh c\u1ee7a \u0111\u1ed9 cao c\u00e1c \u0111\u1ec9nh n\u1eb1m tr\u00ean \u0111\u01b0\u1eddng trung b\u00ecnh M trong kho\u1ea3ng chi\u1ec1u d\u00e0i chu\u1ea9n L. Rp th\u1ec3 hi\u1ec7n m\u1ee9c \u0111\u1ed9 thay \u0111\u1ed5i \u0111\u1ed9 cao c\u1ee7a profin. \u0110\u01a1n v\u1ecb l\u00e0 micromet (\u00b5m).<\/span><\/p>\n

Rv<\/b> – \u0111\u1ed9 s\u00e2u trung b\u00ecnh c\u00e1c \u0111\u00e1y – \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng gi\u00e1 tr\u1ecb trung b\u00ecnh c\u1ee7a \u0111\u1ed9 s\u00e2u c\u00e1c \u0111\u00e1y n\u1eb1m d\u01b0\u1edbi \u0111\u01b0\u1eddng trung b\u00ecnh M trong kho\u1ea3ng chi\u1ec1u d\u00e0i chu\u1ea9n L. Rv th\u1ec3 hi\u1ec7n s\u1ef1 thay \u0111\u1ed5i \u0111\u1ed9 s\u00e2u c\u1ee7a c\u00e1c profin. \u0110\u01a1n v\u1ecb l\u00e0 micromet (\u00b5m).<\/span><\/p>\n

C\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111o \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t<\/b><\/span><\/h2>\n

C\u00f3 3 ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh \u0111\u1ec3 \u0111o \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t l\u00e0 so s\u00e1nh m\u1eabu, d\u00f9ng \u0111\u1ea7u d\u00f2 ti\u1ebfp x\u00fac v\u00e0 \u0111o quang h\u1ecdc.<\/span><\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p so s\u00e1nh m\u1eabu<\/b><\/h3>\n

Vi\u1ec7c n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng m\u1eaft d\u01b0\u1edbi s\u1ef1 h\u1ed7 tr\u1ee3 c\u1ee7a \u00e1nh s\u00e1ng v\u00e0 k\u00ednh l\u00fap. B\u1ec1 m\u1eb7t c\u1ea7n \u0111o \u0111\u1ed9 nh\u00e1m \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi c\u00e1c m\u1eabu b\u1ec1 m\u1eb7t \u0111\u00e3 bi\u1ebft tr\u01b0\u1edbc \u0111\u1ed9 nh\u00e1m, ch\u1ee7 y\u1ebfu ki\u1ec3m tra s\u1ef1 t\u01b0\u01a1ng \u0111\u1ed3ng gi\u1eefa c\u00e1c \u0111\u01b0\u1eddng v\u00e2n tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u sau qu\u00e1 tr\u00ecnh gia c\u00f4ng phay ho\u1eb7c ti\u1ec7n.<\/span><\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u00f3 \u01b0u \u0111i\u1ec3m l\u00e0 \u0111\u01a1n gi\u1ea3n, th\u1ef1c hi\u1ec7n nhanh ch\u00f3ng, \u00edt t\u1ed1n k\u00e9m. Nh\u01b0ng nh\u01b0\u1ee3c \u0111i\u1ec3m l\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c kh\u00f4ng cao, c\u0169ng nh\u01b0 ch\u1ec9 \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c tr\u00ean c\u00e1c b\u1ec1 m\u1eb7t c\u00f9ng ch\u1ea5t li\u1ec7u v\u00e0 c\u00f9ng ph\u01b0\u01a1ng ph\u00e1p gia c\u00f4ng.<\/span><\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p \u0111o ti\u1ebfp x\u00fac b\u1eb1ng \u0111\u1ea7u d\u00f2<\/b><\/h3>\n

\"\u0111o<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p \u0111o \u0111\u1ed9 nh\u00e1m n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch d\u00f9ng \u0111\u1ea7u \u0111o (tr\u00ean c\u00e1c m\u00e1y \u0111o \u0111\u1ed9 nh\u00e1m<\/a>) ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp v\u1edbi b\u1ec1 m\u1eb7t c\u1ea7n \u0111o \u0111\u1ec3 kh\u00f4ng ch\u1ec9 t\u00ednh to\u00e1n ra th\u00f4ng s\u1ed1 \u0111\u1ed9 nh\u00e1m c\u1ea7n thi\u1ebft m\u00e0 c\u00f2n ghi l\u1ea1i \u0111\u01b0\u1ee3c h\u00ecnh d\u1ea1ng profin c\u1ee7a b\u1ec1 m\u1eb7t. \u0110\u1ea7u \u0111o \u0111\u1ed9 nh\u00e1m n\u00e0y c\u00f3 g\u1eafn kim \u0111o c\u1ef1c nh\u1ea1y \u0111\u1ec3 ghi \u0111\u01b0\u1ee3c nh\u1eefng thay \u0111\u1ed5i c\u1ee7a m\u1ea5p m\u00f4 profin trong kho\u1ea3ng ch\u1ec9 v\u00e0i micromet.<\/span><\/p>\n

\u01afu \u0111i\u1ec3m c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p \u0111o ti\u1ebfp x\u00fac n\u00e0y l\u00e0 c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c r\u1ea5t cao, qu\u00e1 tr\u00ecnh \u0111o di\u1ec5n ra nhanh ch\u00f3ng, ch\u1ec9 trong v\u00e0i gi\u00e2y l\u00e0 \u0111\u00e3 c\u00f3 k\u1ebft qu\u1ea3 c\u1ea7n \u0111o. H\u1ea1n ch\u1ebf c\u1ee7a n\u00f3 l\u00e0 kh\u1ea3 n\u0103ng kim \u0111o b\u1ecb h\u1ecfng cao n\u1ebfu kh\u00f4ng s\u1eed d\u1ee5ng v\u00e0 b\u1ea3o qu\u1ea3n \u0111\u00fang c\u00e1ch, c\u0169ng nh\u01b0 kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c b\u1ec1 m\u1eb7t c\u00f3 \u0111\u1ed9 d\u1ebbo cao.<\/span><\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p \u0111o quang h\u1ecdc<\/b><\/h3>\n

\u0110o \u0111\u1ed9 nh\u00e1m b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p quang h\u1ecdc ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng d\u1ef1a tr\u00ean c\u00e1c m\u00e1y qu\u00e9t laser. Ch\u00f9m tia laser t\u1eeb \u0111\u1ea7u qu\u00e9t s\u1ebd thu th\u1eadp c\u00e1c d\u1eef li\u1ec7u bi\u00ean d\u1ea1ng c\u1ee7a b\u1ec1 m\u1eb7t c\u1ea7n \u0111o, t\u1eeb \u0111\u00f3 t\u00ednh to\u00e1n ra \u0111\u1ed9 nh\u00e1m c\u1ee7a b\u1ec1 m\u1eb7t. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111o \u0111\u1ed9 nh\u00e1m trung b\u00ecnh cho c\u1ea3 m\u1ed9t v\u00f9ng l\u1ea5y m\u1eabu.<\/span><\/p>\n

Do \u0111\u00e2y l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p \u0111o kh\u00f4ng ti\u1ebfp x\u00fac n\u00ean \u01b0u \u0111i\u1ec3m \u0111\u1ea7u ti\u00ean c\u1ee7a n\u00f3 l\u00e0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn b\u1ec1 m\u1eb7t c\u1ea7n \u0111o, th\u1ee9 hai l\u00e0 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c tr\u00ean c\u1ea3 nh\u1eefng b\u1ec1 m\u1eb7t c\u00f3 \u0111\u1ed9 m\u1ec1m d\u1ebbo cao nh\u01b0 b\u1ec1 m\u1eb7t cao su ch\u1eb3ng h\u1ea1n, v\u00e0 k\u1ebft qu\u1ea3 c\u0169ng c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c kh\u00e1 cao. Nh\u01b0\u1ee3c \u0111i\u1ec3m l\u1edbn nh\u1ea5t c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u00f3 l\u1ebd l\u00e0 chi ph\u00ed \u0111\u1ea7u t\u01b0 cho m\u00e1y \u0111o v\u00e0 k\u1ef9 n\u0103ng c\u1ea7n \u0111\u00f2i h\u1ecfi cao h\u01a1n \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi th\u1ef1c hi\u1ec7n.<\/span><\/p>\n

Ti\u00eau chu\u1ea9n v\u00e0 c\u1ea5p \u0111\u1ed9 c\u1ee7a \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t<\/b><\/span><\/h2>\n

\u0110\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t \u0111\u01b0\u1ee3c th\u1ed1ng nh\u1ea5t theo c\u00e1c ti\u00eau chu\u1ea9n ISO (Ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf) v\u00e0 t\u1ea1i n\u01b0\u1edbc\u00a0 ta l\u00e0 TCVN (Ti\u00eau chu\u1ea9n Vi\u1ec7t Nam). Th\u1ef1c t\u1ebf TCVN v\u1ec1 \u0111\u1ed9 nh\u00e1m c\u0169ng \u0111\u01b0\u1ee3c d\u1ef1a tr\u00ean ISO \u0111\u1ec3 \u0111\u1ed3ng nh\u1ea5t c\u00e1c \u0111\u00e1nh gi\u00e1 v\u1edbi qu\u1ed1c t\u1ebf.\u00a0<\/span><\/p>\n

C\u00e1c Ti\u00eau chu\u1ea9n Vi\u1ec7t Nam v\u1ec1 \u0111\u1ed9 nh\u00e1m g\u1ed3m:<\/span><\/p>\n