{"id":3800,"date":"2019-10-08T07:56:19","date_gmt":"2019-10-08T07:56:19","guid":{"rendered":"https:\/\/www.mcctcarbide.com\/?p=3800"},"modified":"2020-05-06T03:05:28","modified_gmt":"2020-05-06T03:05:28","slug":"what-to-know-about-surface-roughness","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/dieu-can-biet-ve-do-nham-be-mat\/","title":{"rendered":"Nh\u1eefng \u0111i\u1ec1u c\u1ea7n bi\u1ebft v\u1ec1 \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t"},"content":{"rendered":"
\n

Ch\u00fang t\u00f4i nh\u1eadn th\u1ee9c \u0111\u01b0\u1ee3c r\u1eb1ng \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t c\u00f3 ngh\u0129a l\u00e0 r\u1ea5t nhi\u1ec1u trong ng\u00e0nh s\u1ea3n xu\u1ea5t. Khi kh\u00e1i ni\u1ec7m \u0111\u01b0\u1ee3c g\u1ee3i l\u1ea1i trong t\u00e2m tr\u00ed c\u1ee7a b\u1ea1n, ph\u1ea3i c\u00f3 m\u1ed9t s\u1ed1 k\u1ebft c\u1ea5u ph\u1ed5 bi\u1ebfn tr\u00ean c\u00e1c b\u1ed9 ph\u1eadn gia c\u00f4ng, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ec1 m\u1eb7t g\u01b0\u01a1ng s\u00e1ng, m\u1edd v\u00e0 \u0111\u00e1nh b\u00f3ng x\u1ec9n. Ch\u00fang l\u00e0 nh\u1eefng g\u00ec m\u00e0 \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t kh\u00e1c nhau th\u1ec3 hi\u1ec7n trong \u0111i\u1ec1u ki\u1ec7n v\u0129 m\u00f4. <\/strong><\/strong><\/p>\n\n\n\n

\u0110\u1ecbnh ngh\u0129a \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t<\/strong><\/strong><\/h2>\n\n\n\n

Nh\u01b0 ch\u00fang ta \u0111\u00e3 bi\u1ebft, asperity c\u1ee7a m\u1ed9t ph\u1ea7n<\/strong>'<\/strong>B\u1ec1 m\u1eb7t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh h\u00ecnh l\u00e0 m\u1ed9t lo\u1ea1t c\u00e1c thung l\u0169ng l\u1edfm ch\u1edfm trong \u0111\u00f3 c\u00f3 \u0111\u1ec9nh, xuy\u00ean qua v\u00e0 kho\u1ea3ng c\u00e1ch gi\u1eefa ch\u00fang. <\/strong><\/strong><\/p>\n\n\n\n

Nh\u01b0 m\u1ed9t kh\u00e1i ni\u1ec7m m\u00f4 t\u1ea3 b\u1ec1 m\u1eb7t<\/strong>'<\/strong>C\u1ea5u tr\u00fac k\u00ednh hi\u1ec3n vi, \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t tr\u00ean th\u1ef1c t\u1ebf l\u00e0 chi\u1ec1u d\u00e0i S gi\u1eefa c\u00e1c \u0111\u1ec9nh n\u00e0y (ho\u1eb7c m\u00e1ng, th\u01b0\u1eddng d\u01b0\u1edbi 1mm) v\u00e0 \u0111\u1ed9 s\u00e2u Z t\u1eeb m\u00e1ng \u0111\u1ebfn \u0111\u1ec9nh th\u1ec3 hi\u1ec7n trong s\u01a1 \u0111\u1ed3 sau.<\/strong><\/strong><\/p>\n\n\n\n

N\u00f3i chung, ch\u00fang t\u00f4i ph\u00e2n bi\u1ec7t \u0111i\u1ec1u ki\u1ec7n b\u1ec1 m\u1eb7t kh\u00e1c nhau t\u00f9y theo ph\u1ea1m vi c\u1ee7a S.<\/p>\n\n\n\n

S \uff1c 1mm, \u0111\u1ed9 ch\u1ee5m \u0111\u01b0\u1ee3c coi l\u00e0 \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t,<\/p>\n\n\n\n

1\u2264Smm10mm, n\u00f3 \u0111\u01b0\u1ee3c coi l\u00e0 waviness,<\/p>\n\n\n\n

S \uff1e 10 mm, n\u00f3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u h\u00ecnh h\u1ecdc.  <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

3 ti\u00eau chu\u1ea9n v\u00e0 b\u1ea3ng so s\u00e1nh c\u1ee7a h\u1ecd<\/strong><\/strong><\/h2>\n\n\n\n

\u1ede Trung Qu\u1ed1c, c\u00e1c ti\u00eau chu\u1ea9n \u0111o \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t theo 3 Ch\u1ec9 s\u1ed1, (\u0111\u01a1n v\u1ecb: mm) l\u00e0 \u0111\u1ed9 l\u1ec7ch s\u1ed1 h\u1ecdc trung b\u00ecnh c\u1ee7a \u0111\u01b0\u1eddng vi\u1ec1n Ra, chi\u1ec1u cao trung b\u00ecnh c\u1ee7a Rz kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 \u0111\u1ed9 s\u00e2u t\u1ed1i \u0111a c\u1ee7a thung l\u0169ng Ry.<\/p>\n\n\n\n

Trong h\u1ea7u h\u1ebft c\u00e1c ho\u1ea1t \u0111\u1ed9ng s\u1ea3n xu\u1ea5t th\u1ef1c t\u1ebf, Ra h\u1ea7u h\u1ebft \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng. Trong khi \u1edf Nh\u1eadt B\u1ea3n, Ry \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u nh\u1ea5t, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Rt\u1ed1i \u0111a<\/sub>. Ng\u01b0\u1eddi d\u00e2n \u1edf khu v\u1ef1c ch\u00e2u \u00c2u s\u1eed d\u1ee5ng VDI 3400. Ch\u00fang t\u00f4i \u0111\u00e3 l\u1eadp m\u1ed9t b\u1ea3ng so s\u00e1nh v\u1ec1 3 ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb nh\u01b0 d\u01b0\u1edbi \u0111\u00e2y, <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

S\u01a1 \u0111\u1ed3 2. So s\u00e1nh gi\u1eefa Ra, R<\/strong>t\u1ed1i \u0111a<\/sub><\/strong><\/sub><\/strong>v\u00e0 VDI3400.<\/strong><\/strong><\/p>\n\n\n\n

C\u00e1c y\u1ebfu t\u1ed1 h\u00ecnh th\u00e0nh c\u1ee7a \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t<\/strong><\/strong><\/h2>\n\n\n\n

\u0110\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t th\u01b0\u1eddng \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c, ch\u1eb3ng h\u1ea1n nh\u01b0 ma s\u00e1t gi\u1eefa d\u1ee5ng c\u1ee5 v\u00e0 b\u1ec1 m\u1eb7t chi ti\u1ebft, bi\u1ebfn d\u1ea1ng d\u1ebbo c\u1ee7a kim lo\u1ea1i b\u1ec1 m\u1eb7t khi t\u00e1ch r\u1eddi, dao \u0111\u1ed9ng t\u1ea7n s\u1ed1 cao trong h\u1ec7 th\u1ed1ng x\u1eed l\u00fd, h\u1ed1 x\u1ea3 trong gia c\u00f4ng \u0111i\u1ec7n, v.v. c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p gia c\u00f4ng v\u00e0 v\u1eadt li\u1ec7u ph\u00f4i, \u0111\u1ed9 s\u00e2u, m\u1eadt \u0111\u1ed9, h\u00ecnh d\u1ea1ng v\u00e0 k\u1ebft c\u1ea5u c\u1ee7a c\u00e1c d\u1ea5u v\u1ebft \u0111\u1ec3 l\u1ea1i tr\u00ean b\u1ec1 m\u1eb7t gia c\u00f4ng l\u00e0 kh\u00e1c nhau.<\/strong><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

T\u00e1c d\u1ee5ng ch\u00ednh c\u1ee7a \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t tr\u00ean c\u00e1c b\u1ed9 ph\u1eadn<\/strong><\/strong><\/h2>\n\n\n\n

\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00f2n.<\/strong><\/strong><\/h3>\n\n\n\n

B\u1ec1 m\u1eb7t c\u00e0ng c\u1ee9ng, di\u1ec7n t\u00edch ti\u1ebfp x\u00fac hi\u1ec7u qu\u1ea3 gi\u1eefa c\u00e1c b\u1ec1 m\u1eb7t c\u00e0ng nh\u1ecf, \u00e1p su\u1ea5t c\u00e0ng l\u1edbn, kh\u1ea3 n\u0103ng ch\u1ed1ng ma s\u00e1t c\u00e0ng l\u1edbn v\u00e0 \u0111\u1ed9 m\u00f2n c\u00e0ng nhanh.<\/strong><\/strong><\/p>\n\n\n\n

\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 \u1ed5n \u0111\u1ecbnh c\u1ee7a s\u1ef1 ph\u1ed1i h\u1ee3p.<\/strong><\/strong><\/h3>\n\n\n\n

\u0110\u1ed1i v\u1edbi \u0111\u1ed9 h\u1edf ph\u00f9 h\u1ee3p, b\u1ec1 m\u1eb7t c\u00e0ng c\u1ee9ng th\u00ec \u0111\u1ed9 hao m\u00f2n s\u1ebd c\u00e0ng d\u1ec5 d\u00e0ng v\u00e0 \u0111\u1ed9 h\u1edf s\u1ebd t\u0103ng d\u1ea7n trong qu\u00e1 tr\u00ecnh l\u00e0m vi\u1ec7c. \u0110\u1ed1i v\u1edbi s\u1ef1 ph\u00f9 h\u1ee3p nhi\u1ec5u, nhi\u1ec5u th\u1ef1c t\u1ebf c\u00f3 hi\u1ec7u qu\u1ea3 s\u1ebd gi\u1ea3m v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 k\u1ebft n\u1ed1i s\u1ebd b\u1ecb gi\u1ea3m do s\u1ef1 \u0111\u00f9n c\u1ee7a c\u00e1c \u0111\u1ec9nh vi l\u1ed3i trong qu\u00e1 tr\u00ecnh l\u1eafp r\u00e1p.<\/strong><\/strong><\/p>\n\n\n\n

S\u1ee9c m\u1ea1nh m\u1ec7t m\u1ecfi b\u1ecb \u1ea3nh h\u01b0\u1edfng.<\/strong><\/strong><\/h3>\n\n\n\n

C\u00f3 m\u00e1ng l\u1edbn tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c ph\u1ea7n th\u00f4. Gi\u1ed1ng nh\u01b0 c\u00e1c r\u00e3nh v\u00e0 v\u1ebft n\u1ee9t s\u1eafc n\u00e9t, ch\u00fang r\u1ea5t nh\u1ea1y c\u1ea3m v\u1edbi s\u1ef1 t\u1eadp trung c\u0103ng th\u1eb3ng, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n m\u1ecfi c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn.<\/strong><\/strong><\/p>\n\n\n\n

\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n.<\/strong><\/strong><\/h3>\n\n\n\n

B\u1ec1 m\u1eb7t c\u00e1c ph\u1ea7n g\u1ed3 gh\u1ec1, d\u1ec5 t\u1ea1o ra c\u00e1c ch\u1ea5t kh\u00ed ho\u1eb7c ch\u1ea5t l\u1ecfng \u0103n m\u00f2n th\u00f4ng qua b\u1ec1 m\u1eb7t c\u1ee7a s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a thung l\u0169ng vi m\u00f4 v\u00e0o l\u1edbp b\u00ean trong kim lo\u1ea1i, d\u1eabn \u0111\u1ebfn \u0103n m\u00f2n b\u1ec1 m\u1eb7t.<\/strong><\/strong><\/p>\n\n\n\n

\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn ni\u00eam phong<\/strong><\/strong><\/h3>\n\n\n\n

C\u00e1c b\u1ec1 m\u1eb7t g\u1ed3 gh\u1ec1 kh\u00f4ng v\u1eeba kh\u00edt v\u00e0 kh\u00ed ho\u1eb7c ch\u1ea5t l\u1ecfng r\u00f2 r\u1ec9 qua c\u00e1c v\u1ebft n\u1ee9t gi\u1eefa c\u00e1c b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac.<\/strong><\/strong><\/p>\n\n\n\n

\u0110\u1ed9 c\u1ee9ng ti\u1ebfp x\u00fac b\u1ecb \u1ea3nh h\u01b0\u1edfng<\/strong><\/strong><\/h3>\n\n\n\n

\u0110\u1ed9 c\u1ee9ng ti\u1ebfp x\u00fac l\u00e0 kh\u1ea3 n\u0103ng c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn \u0111\u1ec3 ch\u1ed1ng bi\u1ebfn d\u1ea1ng ti\u1ebfp x\u00fac d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng b\u00ean ngo\u00e0i. \u0110\u1ed9 c\u1ee9ng c\u1ee7a m\u00e1y ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o \u0111\u1ed9 c\u1ee9ng ti\u1ebfp x\u00fac gi\u1eefa c\u00e1c b\u1ed9 ph\u1eadn.<\/strong><\/strong><\/p>\n\n\n\n

\u0110\u1ed9 ch\u00ednh x\u00e1c \u0111o b\u1ecb \u1ea3nh h\u01b0\u1edfng<\/strong><\/strong><\/h3>\n\n\n\n

\u0110\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn \u0111o v\u00e0 d\u1ee5ng c\u1ee5 \u0111o s\u1ebd \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a ph\u00e9p \u0111o, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong ph\u00e9p \u0111o ch\u00ednh x\u00e1c.<\/strong><\/strong><\/p>\n\n\n\n

Ngo\u00e0i ra, \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t c\u00f3 \u1ea3nh h\u01b0\u1edfng kh\u00e1c nhau \u0111\u1ebfn l\u1edbp ph\u1ee7, \u0111\u1ed9 d\u1eabn nhi\u1ec7t v\u00e0 \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac, \u0111\u1ed9 ph\u1ea3n x\u1ea1 v\u00e0 hi\u1ec7u su\u1ea5t b\u1ee9c x\u1ea1, s\u1ee9c c\u1ea3n c\u1ee7a d\u00f2ng ch\u1ea5t l\u1ecfng v\u00e0 kh\u00ed v\u00e0 d\u00f2ng ch\u1ea3y tr\u00ean b\u1ec1 m\u1eb7t d\u00e2y d\u1eabn.<\/strong><\/strong><\/p>\n\n\n\n

C\u01a1 s\u1edf \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t<\/strong><\/strong><\/h2>\n\n\n\n

Chi\u1ec1u d\u00e0i l\u1ea5y m\u1eabu<\/strong><\/h3>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u0110\u1ed9 d\u00e0i l\u1ea5y m\u1eabu l\u00e0 chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng tham chi\u1ebfu \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 tu\u1ed5i c\u1ee7a \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t. Theo \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u00e0nh v\u00e0 k\u1ebft c\u1ea5u c\u1ee7a b\u1ec1 m\u1eb7t th\u1ef1c t\u1ebf c\u1ee7a b\u1ed9 ph\u1eadn, chi\u1ec1u d\u00e0i c\u1ee7a ph\u1ea7n ph\u1ea3n \u00e1nh c\u00e1c \u0111\u1eb7c t\u00ednh \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t ph\u1ea3i \u0111\u01b0\u1ee3c ch\u1ecdn, v\u00e0 chi\u1ec1u d\u00e0i l\u1ea5y m\u1eabu ph\u1ea3i \u0111\u01b0\u1ee3c \u0111o theo t\u1ed5ng h\u01b0\u1edbng c\u1ee7a m\u1eb7t c\u1eaft th\u1ef1c t\u1ebf. Chi\u1ec1u d\u00e0i l\u1ea5y m\u1eabu \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh v\u00e0 l\u1ef1a ch\u1ecdn \u0111\u1ec3 h\u1ea1n ch\u1ebf v\u00e0 gi\u1ea3m \u1ea3nh h\u01b0\u1edfng c\u1ee7a \u0111\u1ed9 ch\u1ee5m b\u1ec1 m\u1eb7t v\u00e0 sai s\u1ed1 h\u00ecnh d\u1ea1ng \u0111\u1ebfn k\u1ebft qu\u1ea3 \u0111o \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t.<\/strong><\/p>\n\n\n\n

Th\u1eddi l\u01b0\u1ee3ng \u0111\u00e1nh gi\u00e1<\/strong><\/h3>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u0110\u1ed9 d\u00e0i \u0111\u00e1nh gi\u00e1 l\u00e0 \u0111\u1ed9 d\u00e0i c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u01b0\u1eddng vi\u1ec1n. N\u00f3 c\u00f3 th\u1ec3 bao g\u1ed3m m\u1ed9t ho\u1eb7c nhi\u1ec1u chi\u1ec1u d\u00e0i l\u1ea5y m\u1eabu. Do \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t c\u1ee7a t\u1eebng ph\u1ea7n c\u1ee7a b\u1ec1 m\u1eb7t b\u1ed9 ph\u1eadn kh\u00f4ng nh\u1ea5t thi\u1ebft ph\u1ea3i \u0111\u1ed3ng nh\u1ea5t, n\u00ean th\u01b0\u1eddng kh\u00f4ng h\u1ee3p l\u00fd \u0111\u1ec3 ph\u1ea3n \u00e1nh c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t nh\u1ea5t \u0111\u1ecbnh tr\u00ean chi\u1ec1u d\u00e0i l\u1ea5y m\u1eabu, do \u0111\u00f3 c\u1ea7n l\u1ea5y m\u1ed9t s\u1ed1 \u0111\u1ed9 d\u00e0i l\u1ea5y m\u1eabu tr\u00ean b\u1ec1 m\u1eb7t \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 b\u1ec1 m\u1eb7t \u0111\u1ed9 nh\u00e1m. Chi\u1ec1u d\u00e0i \u0111\u00e1nh gi\u00e1 th\u01b0\u1eddng bao g\u1ed3m n\u0103m chi\u1ec1u d\u00e0i l\u1ea5y m\u1eabu.<\/strong><\/p>\n\n\n\n

\u0111\u01b0\u1eddng chu\u1ea9n<\/strong><\/h3>\n\n\n\n

\u0110\u01b0\u1eddng chu\u1ea9n l\u00e0 \u0111\u01b0\u1eddng gi\u1eefa \u0111\u01b0\u1eddng vi\u1ec1n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 c\u00e1c tham s\u1ed1 \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t. C\u00f3 hai lo\u1ea1i \u0111\u01b0\u1eddng chu\u1ea9n: \u0111\u01b0\u1eddng trung b\u00ecnh b\u00ecnh ph\u01b0\u01a1ng nh\u1ecf nh\u1ea5t c\u1ee7a \u0111\u01b0\u1eddng vi\u1ec1n: trong chi\u1ec1u d\u00e0i l\u1ea5y m\u1eabu, t\u1ed5ng ph\u1ea7n b\u00f9 \u0111\u01b0\u1eddng vi\u1ec1n c\u1ee7a m\u1ed7i \u0111i\u1ec3m tr\u00ean \u0111\u01b0\u1eddng \u0111\u1ed3ng m\u1ee9c l\u00e0 nh\u1ecf nh\u1ea5t v\u00e0 n\u00f3 c\u00f3 h\u00ecnh d\u1ea1ng \u0111\u01b0\u1eddng vi\u1ec1n h\u00ecnh h\u1ecdc. S\u1ed1 trung b\u00ecnh trung b\u00ecnh s\u1ed1 h\u1ecdc c\u1ee7a \u0111\u01b0\u1eddng vi\u1ec1n: Trong chi\u1ec1u d\u00e0i l\u1ea5y m\u1eabu, di\u1ec7n t\u00edch \u0111\u01b0\u1eddng vi\u1ec1n \u1edf c\u1ea3 hai b\u00ean c\u1ee7a \u0111\u01b0\u1eddng gi\u1eefa l\u00e0 b\u1eb1ng nhau. V\u1ec1 l\u00fd thuy\u1ebft, \u0111\u01b0\u1eddng trung b\u00ecnh b\u00ecnh ph\u01b0\u01a1ng nh\u1ecf nh\u1ea5t l\u00e0 \u0111\u01b0\u1eddng chu\u1ea9n m\u1ef1c l\u00fd t\u01b0\u1edfng, nh\u01b0ng r\u1ea5t kh\u00f3 \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c trong \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf. Do \u0111\u00f3, \u0111\u01b0\u1eddng trung b\u00ecnh trung b\u00ecnh s\u1ed1 h\u1ecdc th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thay th\u1ebf n\u00f3 v\u00e0 m\u1ed9t \u0111\u01b0\u1eddng c\u00f3 v\u1ecb tr\u00ed g\u1ea7n \u0111\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thay th\u1ebf n\u00f3 trong ph\u00e9p \u0111o.<\/strong><\/strong><\/p>\n\n\n\n

Th\u00f4ng s\u1ed1 \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t<\/strong><\/strong><\/h2>\n\n\n\n

Th\u00f4ng s\u1ed1 \u0111\u1eb7c t\u00ednh chi\u1ec1u cao<\/strong><\/h3>\n\n\n\n

T\u0103ng \u0111\u1ed9 l\u1ec7ch trung b\u00ecnh s\u1ed1 h\u1ecdc \u0111\u01b0\u1eddng vi\u1ec1n: gi\u00e1 tr\u1ecb trung b\u00ecnh s\u1ed1 h\u1ecdc c\u1ee7a gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i c\u1ee7a ph\u1ea7n b\u00f9 \u0111\u01b0\u1eddng vi\u1ec1n trong chi\u1ec1u d\u00e0i l\u1ea5y m\u1eabu (lr). Trong \u0111o l\u01b0\u1eddng th\u1ef1c t\u1ebf, s\u1ed1 \u0111i\u1ec3m \u0111o c\u00e0ng nhi\u1ec1u th\u00ec Ra c\u00e0ng ch\u00ednh x\u00e1c.<\/strong><\/strong><\/p>\n\n\n\n

Chi\u1ec1u cao t\u1ed1i \u0111a c\u1ee7a \u0111\u01b0\u1eddng vi\u1ec1n Rz: kho\u1ea3ng c\u00e1ch gi\u1eefa \u0111\u01b0\u1eddng \u0111\u1ec9nh c\u1ee7a \u0111\u01b0\u1eddng vi\u1ec1n \u0111\u1ec9nh v\u00e0 \u0111\u01b0\u1eddng \u0111\u00e1y c\u1ee7a thung l\u0169ng.<\/strong><\/strong><\/p>\n\n\n\n

Ra \u0111\u01b0\u1ee3c \u01b0a th\u00edch trong ph\u1ea1m vi c\u00e1c tham s\u1ed1 bi\u00ean \u0111\u1ed9 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. Tr\u01b0\u1edbc n\u0103m 2006, m\u1ed9t th\u00f4ng s\u1ed1 \u0111\u00e1nh gi\u00e1 kh\u00e1c trong ti\u00eau chu\u1ea9n qu\u1ed1c gia l\u00e0 \u0111\u1ed9 cao 10 \u0111i\u1ec3m c\u1ee7a \u0111\u1ed9 nh\u00e1m vi m\u00f4 \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1edfi Rz v\u00e0 chi\u1ec1u cao t\u1ed1i \u0111a c\u1ee7a \u0111\u01b0\u1eddng vi\u1ec1n \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1edfi Ry. Sau n\u0103m 2006, \u0111\u1ed9 cao vi m\u00f4 10 \u0111i\u1ec3m \u0111\u00e3 b\u1ecb h\u1ee7y theo ti\u00eau chu\u1ea9n qu\u1ed1c gia v\u00e0 chi\u1ec1u cao t\u1ed1i \u0111a c\u1ee7a \u0111\u01b0\u1eddng vi\u1ec1n \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1edfi Rz.<\/strong><\/strong><\/p>\n\n\n\n

Kho\u1ea3ng c\u00e1ch c\u00e1c tham s\u1ed1 \u0111\u1eb7c t\u00ednh<\/strong><\/h3>\n\n\n\n

Chi\u1ec1u r\u1ed9ng trung b\u00ecnh c\u1ee7a \u0111\u01a1n v\u1ecb \u0111\u01b0\u1eddng vi\u1ec1n RSM. Trong chi\u1ec1u d\u00e0i l\u1ea5y m\u1eabu, kho\u1ea3ng c\u00e1ch trung b\u00ecnh c\u1ee7a \u0111\u1ed9 nh\u00e1m vi \u0111\u01b0\u1eddng vi\u1ec1n. Kho\u1ea3ng c\u00e1ch kh\u00f4ng \u0111\u1ec1u c\u1ee7a k\u00ednh hi\u1ec3n vi \u0111\u1ec1 c\u1eadp \u0111\u1ebfn chi\u1ec1u d\u00e0i c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng vi\u1ec1n v\u00e0 c\u00e1c \u0111\u01b0\u1eddng vi\u1ec1n li\u1ec1n k\u1ec1 tr\u00ean \u0111\u01b0\u1eddng gi\u1eefa. Trong tr\u01b0\u1eddng h\u1ee3p c\u00f3 c\u00f9ng gi\u00e1 tr\u1ecb Ra, gi\u00e1 tr\u1ecb Rsm kh\u00f4ng nh\u1ea5t thi\u1ebft ph\u1ea3i gi\u1ed1ng nhau, do \u0111\u00f3 k\u1ebft c\u1ea5u ph\u1ea3n \u00e1nh s\u1ebd kh\u00e1c nhau. B\u1ec1 m\u1eb7t ch\u00fa \u00fd \u0111\u1ebfn k\u1ebft c\u1ea5u th\u01b0\u1eddng ch\u00fa \u00fd \u0111\u1ebfn hai ch\u1ec9 s\u1ed1 c\u1ee7a Ra v\u00e0 Rsm.<\/strong><\/strong><\/p>\n\n\n\n

C\u00e1c tham s\u1ed1 \u0111\u1eb7c tr\u01b0ng h\u00ecnh d\u1ea1ng c\u1ee7a Rmr \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng t\u1ef7 l\u1ec7 chi\u1ec1u d\u00e0i c\u1ee7a h\u1ed7 tr\u1ee3 \u0111\u01b0\u1eddng vi\u1ec1n, l\u00e0 t\u1ef7 l\u1ec7 gi\u1eefa chi\u1ec1u d\u00e0i c\u1ee7a h\u1ed7 tr\u1ee3 \u0111\u01b0\u1eddng vi\u1ec1n v\u1edbi chi\u1ec1u d\u00e0i l\u1ea5y m\u1eabu. \u0110\u1ed9 d\u00e0i c\u1ee7a h\u1ed7 tr\u1ee3 \u0111\u01b0\u1eddng vi\u1ec1n l\u00e0 t\u1ed5ng \u0111\u1ed9 d\u00e0i m\u1eb7t c\u1eaft c\u1ee7a t\u1eebng ph\u1ea7n trong chi\u1ec1u d\u00e0i l\u1ea5y m\u1eabu, song song v\u1edbi \u0111\u01b0\u1eddng gi\u1eefa v\u00e0 giao v\u1edbi \u0111\u01b0\u1eddng \u0111\u1ec9nh C.<\/strong><\/strong><\/p>\n\n\n\n

Ph\u01b0\u01a1ng ph\u00e1p \u0111o \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t <\/strong><\/h2>\n\n\n\n

ph\u01b0\u01a1ng ph\u00e1p so s\u00e1nh<\/strong><\/h3>\n\n\n\n

N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111o l\u01b0\u1eddng hi\u1ec7n tr\u01b0\u1eddng c\u1ee7a x\u01b0\u1edfng, v\u00e0 n\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111o l\u01b0\u1eddng b\u1ec1 m\u1eb7t trung b\u00ecnh ho\u1eb7c th\u00f4. Ph\u01b0\u01a1ng ph\u00e1p l\u00e0 x\u00e1c \u0111\u1ecbnh gi\u00e1 tr\u1ecb \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t \u0111o b\u1eb1ng c\u00e1ch so s\u00e1nh b\u1ec1 m\u1eb7t \u0111o v\u1edbi m\u1ed9t s\u1ed1 m\u1eabu nh\u00e1m nh\u1ea5t \u0111\u1ecbnh.<\/strong><\/strong><\/p>\n\n\n\n

ph\u01b0\u01a1ng ph\u00e1p ch\u1ea1m kim<\/strong><\/h3>\n\n\n\n

\u0110\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t \u0111ang tr\u01b0\u1ee3t t\u1eeb t\u1eeb d\u1ecdc theo b\u1ec1 m\u1eb7t \u0111o b\u1eb1ng b\u00fat kim c\u01b0\u01a1ng c\u00f3 b\u00e1n k\u00ednh cong kho\u1ea3ng 2 micron. S\u1ef1 d\u1ecbch chuy\u1ec3n c\u1ee7a b\u00fat kim c\u01b0\u01a1ng \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i t\u1eeb c\u1ea3m bi\u1ebfn chi\u1ec1u d\u00e0i \u0111i\u1ec7n sang t\u00edn hi\u1ec7u \u0111i\u1ec7n. Sau khi khu\u1ebfch \u0111\u1ea1i, l\u1ecdc v\u00e0 t\u00ednh to\u00e1n, gi\u00e1 tr\u1ecb \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng d\u1ee5ng c\u1ee5 hi\u1ec3n th\u1ecb. \u0110\u01b0\u1eddng cong h\u1ed3 s\u01a1 c\u1ee7a ph\u1ea7n \u0111o c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ghi l\u1ea1i b\u1eb1ng m\u00e1y ghi \u00e2m.<\/strong><\/strong><\/p>\n\n\n\n

N\u00f3i chung, c\u00f4ng c\u1ee5 \u0111o ch\u1ec9 c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb gi\u00e1 tr\u1ecb \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 d\u1ee5ng c\u1ee5 \u0111o \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t v\u00e0 c\u00f4ng c\u1ee5 \u0111o \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t c\u00f3 th\u1ec3 ghi l\u1ea1i \u0111\u01b0\u1eddng cong c\u1ea5u h\u00ecnh b\u1ec1 m\u1eb7t \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 h\u1ed3 s\u01a1 \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t. Hai c\u00f4ng c\u1ee5 \u0111o l\u01b0\u1eddng n\u00e0y c\u00f3 m\u1ea1ch t\u00ednh to\u00e1n \u0111i\u1ec7n t\u1eed ho\u1eb7c m\u00e1y t\u00ednh. H\u1ecd c\u00f3 th\u1ec3 t\u1ef1 \u0111\u1ed9ng t\u00ednh to\u00e1n \u0111\u1ed9 l\u1ec7ch trung b\u00ecnh s\u1ed1 h\u1ecdc Ra c\u1ee7a \u0111\u01b0\u1eddng vi\u1ec1n, Rz chi\u1ec1u cao 10 \u0111i\u1ec3m c\u1ee7a \u0111\u1ed9 nh\u00e1m vi m\u00f4, \u0111\u1ed9 cao t\u1ed1i \u0111a Ry c\u1ee7a \u0111\u01b0\u1eddng vi\u1ec1n v\u00e0 c\u00e1c tham s\u1ed1 \u0111\u00e1nh gi\u00e1 kh\u00e1c. Ch\u00fang c\u00f3 hi\u1ec7u su\u1ea5t \u0111o cao v\u00e0 ph\u00f9 h\u1ee3p \u0111\u1ec3 \u0111o \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t c\u1ee7a Ra trong kho\u1ea3ng t\u1eeb 0,025 \u0111\u1ebfn 6,3 um.<\/strong><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

We are aware of that surface roughness means a lot in manufacturing industry. When the concept is recalled to your mind, there must be some common textures on machined parts, such as bright mirror surface, matte, and dull polish. They are what different surface roughness embodies in macroscopic condition. Definition of surface roughness As is…<\/p>","protected":false},"author":2,"featured_media":19301,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[92],"tags":[],"jetpack_featured_media_url":"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/10\/\u56fe\u72471-3.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/3800"}],"collection":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/comments?post=3800"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/3800\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media\/19301"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=3800"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=3800"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=3800"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}