{"id":3872,"date":"2019-11-12T06:28:57","date_gmt":"2019-11-12T06:28:57","guid":{"rendered":"https:\/\/www.mcctcarbide.com\/?p=3872"},"modified":"2020-05-06T02:52:12","modified_gmt":"2020-05-06T02:52:12","slug":"technical-analysis-of-micro-milling-on-carbide-material-by-pcd-cutters","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/ky-thuat-phan-tich-cua-vi-phay-tren-cacbua-vat-lieu-cua-pcd-dao\/","title":{"rendered":"Ph\u00e2n t\u00edch k\u1ef9 thu\u1eadt c\u1ee7a phay phay tr\u00ean v\u1eadt li\u1ec7u cacbua b\u1eb1ng m\u00e1y c\u1eaft PCD"},"content":{"rendered":"
\n

Cacbua xi m\u0103ng c\u00f3 \u0111\u1ed9 c\u1ee9ng cao, ch\u1ed1ng m\u00e0i m\u00f2n t\u1ed1t, ch\u1ed1ng \u0103n m\u00f2n v\u00e0 h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t nh\u1ecf. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong s\u1ea3n xu\u1ea5t khu\u00f4n m\u1eabu ch\u00ednh x\u00e1c nh\u01b0 t\u1ea1o h\u00ecnh th\u1ee7y tinh quang h\u1ecdc, k\u00e9o kim lo\u1ea1i v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn ch\u1ed1ng m\u00e0i m\u00f2n v\u00e0 ch\u1ed1ng \u0103n m\u00f2n. Khu\u00f4n cacbua xi m\u0103ng kh\u00f4ng ch\u1ec9 c\u00f3 tu\u1ed5i th\u1ecd cao, g\u1ea5p m\u01b0\u1eddi l\u1ea7n, th\u1eadm ch\u00ed h\u00e0ng tr\u0103m l\u1ea7n so v\u1edbi khu\u00f4n th\u00e9p m\u00e0 c\u00f2n c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t s\u1ea3n ph\u1ea9m r\u1ea5t cao. Th\u1ea5u k\u00ednh th\u1ee7y tinh v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c c\u1ee7a qu\u00e1 tr\u00ecnh \u00e9p phun c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t quang h\u1ecdc.<\/p>\n\n\n\n

Cacbua xi m\u0103ng th\u01b0\u1eddng l\u00e0 v\u1eadt li\u1ec7u kh\u00f3 ch\u1ebf t\u1ea1o m\u00e1y do kh\u1ea3 n\u0103ng gia c\u00f4ng k\u00e9m. M\u00e0i v\u00e0 EDM l\u00e0 hai trong s\u1ed1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p gia c\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u1ee7a khu\u00f4n d\u1eadp cacbua xi m\u0103ng. V\u1edbi s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a CBN, kim c\u01b0\u01a1ng v\u00e0 c\u00e1c d\u1ee5ng c\u1ee5 si\u00eau c\u1ee9ng kh\u00e1c, c\u00f3 th\u1ec3 c\u1eaft tr\u1ef1c ti\u1ebfp cacbua xi m\u0103ng, \u0111i\u1ec1u n\u00e0y ng\u00e0y c\u00e0ng thu h\u00fat nhi\u1ec1u s\u1ef1 ch\u00fa \u00fd. C\u00e1c h\u1ecdc gi\u1ea3 n\u01b0\u1edbc ngo\u00e0i \u0111\u00e3 ti\u1ebfn h\u00e0nh nhi\u1ec1u nghi\u00ean c\u1ee9u h\u01a1n. B. bulla v\u00e0 c\u1ed9ng s\u1ef1. Ph\u00e2n t\u00edch \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c th\u00f4ng s\u1ed1 gia c\u00f4ng \u0111\u1ebfn bi\u00ean d\u1ea1ng b\u1ec1 m\u1eb7t c\u1ee7a cacbua xi m\u0103ng trong qu\u00e1 tr\u00ecnh ti\u1ec7n kim c\u01b0\u01a1ng. Sau khi c\u00f3 \u0111\u01b0\u1ee3c c\u00e1c th\u00f4ng s\u1ed1 gia c\u00f4ng t\u1ed1i \u01b0u, ti\u1ebfp t\u1ee5c nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a d\u1ea1ng h\u00ecnh h\u1ecdc dao \u0111\u1ebfn \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t v\u00e0 \u0111\u1ed9 m\u00f2n c\u1ee7a dao. N. Suzuki v\u00e0 c\u1ed9ng s\u1ef1. Th\u1ef1c hi\u1ec7n c\u00e1c th\u00ed nghi\u1ec7m quay rung \u0111\u1ed9ng h\u00ecnh elip si\u00eau \u00e2m kim c\u01b0\u01a1ng tr\u00ean cacbua xi m\u0103ng. Ng\u01b0\u1eddi ta th\u1ea5y r\u1eb1ng ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t c\u1ee7a ti\u1ec7n si\u00eau \u00e2m rung h\u00ecnh elip t\u1ed1t h\u01a1n so v\u1edbi ti\u1ec7n th\u01b0\u1eddng v\u00e0 \u0111\u1ed9 m\u00f2n c\u1ee7a dao nh\u1ecf h\u01a1n. Th\u00f4ng qua c\u00e1c th\u00ed nghi\u1ec7m, c\u00e1c khu\u00f4n h\u1ee3p kim c\u1ee9ng nh\u01b0 l\u0103ng k\u00ednh vi m\u00f4 v\u00e0 th\u1ea5u k\u00ednh h\u00ecnh c\u1ea7u v\u1edbi ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t quang h\u1ecdc c\u0169ng \u0111\u01b0\u1ee3c gia c\u00f4ng.<\/p>\n\n\n\n

\u0110\u00e2y l\u00e0 m\u1ed9t d\u1ea5u hi\u1ec7u quan tr\u1ecdng \u0111\u1ec3 \u0111o l\u01b0\u1eddng tr\u00ecnh \u0111\u1ed9 s\u1ea3n xu\u1ea5t c\u1ee7a khu\u00f4n \u0111\u00fac qu\u1ed1c gia \u0111\u1ec3 s\u1ea3n xu\u1ea5t khu\u00f4n \u0111\u00fac cacbua xi m\u0103ng ch\u00ednh x\u00e1c, ph\u1ee9c t\u1ea1p v\u00e0 c\u00f3 tu\u1ed5i th\u1ecd cao. C\u00f4ng ngh\u1ec7 phay vi m\u00f4 c\u00f3 \u01b0u \u0111i\u1ec3m l\u00e0 hi\u1ec7u qu\u1ea3 gia c\u00f4ng cao, nhi\u1ec1u lo\u1ea1i v\u1eadt li\u1ec7u gia c\u00f4ng, gia c\u00f4ng h\u00ecnh d\u1ea1ng ph\u1ee9c t\u1ea1p ba chi\u1ec1u, ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t cao, v.v. N\u00f3 r\u1ea5t th\u00edch h\u1ee3p \u0111\u1ec3 gia c\u00f4ng khu\u00f4n vi m\u00f4 v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn vi m\u00f4 b\u1eb1ng cacbua xi m\u0103ng v\u00e0 c\u00f3 tri\u1ec3n v\u1ecdng \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i. Trong b\u00e0i b\u00e1o n\u00e0y, c\u00e1c d\u1ee5ng c\u1ee5 tr\u00e1ng kim c\u01b0\u01a1ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 phay vi cacbua xi m\u0103ng. L\u1ef1c c\u1eaft, ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t v\u00e0 \u0111\u1ed9 m\u00f2n c\u1ee7a d\u1ee5ng c\u1ee5 \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch.<\/p>\n\n\n\n

Thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m v\u00e0 l\u1ecbch tr\u00ecnh th\u1eed nghi\u1ec7m c\u1ee7a phay vi m\u00f4 PDC<\/strong><\/h2>\n\n\n\n

C\u00f4ng c\u1ee5 m\u00e1y phay vi m\u00f4 c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao t\u1ef1 ch\u1ebf t\u1ea1o (xem H\u00ecnh 1) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. M\u00e1y c\u00f4ng c\u1ee5 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 phay vi m\u00f4 c\u00e1c b\u1ed9 ph\u1eadn nh\u1ecf v\u00e0 si\u00eau nh\u1ecf. N\u00f3 bao g\u1ed3m l\u1edbp \u0111\u00e1 c\u1ea9m th\u1ea1ch, c\u01a1 c\u1ea5u c\u1ea5p li\u1ec7u, tr\u1ee5c tuy\u1ec3n n\u1ed5i kh\u00f4ng kh\u00ed t\u1ed1c \u0111\u1ed9 cao, h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n chuy\u1ec3n \u0111\u1ed9ng d\u1ef1a tr\u00ean PMAC, v.v. Do \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a dao phay si\u00eau nh\u1ecf, kh\u00f4ng d\u1ec5 d\u00e0ng \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t d\u1ee5ng c\u1ee5 ch\u00ednh x\u00e1c. M\u00e1y c\u00f4ng c\u1ee5 \u0111\u01b0\u1ee3c trang b\u1ecb h\u1ec7 th\u1ed1ng c\u00e0i \u0111\u1eb7t c\u00f4ng c\u1ee5 k\u00ednh hi\u1ec3n vi, h\u1ec7 th\u1ed1ng n\u00e0y c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 theo d\u00f5i tr\u1ef1c tuy\u1ebfn qu\u00e1 tr\u00ecnh phay vi m\u00f4.<\/p>\n\n\n\n

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

H\u00ecnh 1 m\u00e1y phay si\u00eau nh\u1ecf<\/strong><\/strong><\/p>\n\n\n\n

S\u1eed d\u1ee5ng dao phay si\u00eau nh\u1ecf ph\u1ee7 kim c\u01b0\u01a1ng c\u00f3 c\u1ea1nh xo\u1eafn \u1ed1c (xem H\u00ecnh 2a). V\u1eadt li\u1ec7u c\u01a1 b\u1ea3n c\u1ee7a dao c\u1eaft l\u00e0 h\u1ee3p kim c\u1ee9ng, v\u00e0 m\u1ed9t l\u1edbp phim kim c\u01b0\u01a1ng \u0111\u01b0\u1ee3c ph\u1ee7 b\u1edfi qu\u00e1 tr\u00ecnh l\u1eafng \u0111\u1ecdng h\u01a1i h\u00f3a h\u1ecdc (CVD). \u0110\u01b0\u1eddng k\u00ednh tay c\u1ea7m l\u00e0 6mm, \u0111\u01b0\u1eddng k\u00ednh l\u01b0\u1ee1i dao l\u00e0 1mm, chi\u1ec1u d\u00e0i l\u01b0\u1ee1i dao l\u00e0 2mm, g\u00f3c tr\u01b0\u1edbc c\u1ee7a d\u1ee5ng c\u1ee5 l\u00e0 2 \u00b0, g\u00f3c sau l\u00e0 14 \u00b0 v\u00e0 g\u00f3c xo\u1eafn \u1ed1c l\u00e0 35 \u00b0. B\u00e1n k\u00ednh cung tr\u00f2n c\u1ee7a m\u0169i dao \u03b3 \u03b5 \u0111o \u0111\u01b0\u1ee3c t\u1eeb h\u00ecnh chi\u1ebfu b\u00ean SEM l\u00e0 kho\u1ea3ng 11 \u03bc m (xem H\u00ecnh 2b); b\u00e1n k\u00ednh cung tr\u00f2n c\u1ea1nh dao \u03b3 \u03b2 \u0111o \u0111\u01b0\u1ee3c t\u1eeb h\u00ecnh chi\u1ebfu tr\u00ean c\u00f9ng c\u1ee7a SEM l\u00e0 kho\u1ea3ng 8 \u03bc m (xem H\u00ecnh 2C).<\/p>\n\n\n\n

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

(a) (b)<\/p>\n\n\n\n

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

(c)<\/p>\n\n\n\n

 H\u00ecnh 2 dao phay si\u00eau nh\u1ecf tr\u00e1ng kim c\u01b0\u01a1ng<\/strong><\/strong><\/p>\n\n\n\n

D\u1ee5ng c\u1ee5 tr\u00e1ng kim c\u01b0\u01a1ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 gia c\u00f4ng c\u00e1c r\u00e3nh th\u1eb3ng d\u01b0\u1edbi c\u00e1c th\u00f4ng s\u1ed1 gia c\u00f4ng kh\u00e1c nhau. Tr\u01b0\u1edbc khi ki\u1ec3m tra, b\u1ec1 m\u1eb7t c\u1ee7a ph\u00f4i \u0111\u01b0\u1ee3c \u0111\u00e1nh b\u00f3ng, sau \u0111\u00f3 c\u1ed1 \u0111\u1ecbnh v\u00e0 k\u1eb9p v\u00e0o d\u1ee5ng c\u1ee5 \u0111o, t\u1ea7n s\u1ed1 l\u1ea5y m\u1eabu l\u00e0 20kHz. T\u1ea5t c\u1ea3 c\u00e1c th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong \u0111i\u1ec1u ki\u1ec7n c\u1eaft kh\u00f4. Xem B\u1ea3ng 1 \u0111\u1ec3 bi\u1ebft c\u00e1c th\u00f4ng s\u1ed1 th\u1eed nghi\u1ec7m vi phay. T\u1ed1c \u0111\u1ed9 tr\u1ee5c ch\u00ednh n \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh \u1edf 20000r \/ ph\u00fat, \u0111\u1ed9 s\u00e2u phay AP l\u00e0 2 \u03bcm v\u00e0 4 \u03bcm, v\u00e0 t\u1ed1c \u0111\u1ed9 ti\u1ebfn dao c\u1ee7a m\u1ed7i r\u0103ng FZ l\u00e0 0,3-1,5 \u03bc M. Sau khi th\u1eed nghi\u1ec7m, m\u00e1y l\u00e0m s\u1ea1ch si\u00eau \u00e2m \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m s\u1ea1ch ph\u00f4i. M\u00e1y \u0111o \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t Mahr \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t gia c\u00f4ng v\u00e0 \u0111\u01b0\u1eddng cong bi\u00ean d\u1ea1ng vi m\u00f4 d\u1ecdc theo h\u01b0\u1edbng ti\u1ebfn dao. H\u00ecnh th\u00e1i b\u1ec1 m\u1eb7t gia c\u00f4ng v\u00e0 h\u00ecnh th\u00e1i m\u00e0i m\u00f2n d\u1ee5ng c\u1ee5 \u0111\u01b0\u1ee3c quan s\u00e1t b\u1eb1ng SEM.<\/p>\n\n\n\n

K\u1ebft qu\u1ea3 ki\u1ec3m tra v\u00e0 ph\u00e2n t\u00edch<\/strong> c\u1ee7a PCD vi phay<\/h2>\n\n\n\n

T\u00edn hi\u1ec7u l\u1ef1c phay l\u00e0 m\u1ed9t tham s\u1ed1 quan tr\u1ecdng \u0111\u1ec3 theo d\u00f5i qu\u00e1 tr\u00ecnh phay, c\u00f3 th\u1ec3 ph\u1ea3n \u00e1nh t\u00ecnh tr\u1ea1ng m\u00f2n dao v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t gia c\u00f4ng trong th\u1eddi gian th\u1ef1c. Trong qu\u00e1 tr\u00ecnh phay, chi\u1ec1u d\u00e0y l\u1edbp c\u1eaft thay \u0111\u1ed5i li\u00ean t\u1ee5c, t\u0103ng t\u1eeb kh\u00f4ng \u0111\u1ebfn l\u1edbn nh\u1ea5t v\u00e0 sau \u0111\u00f3 gi\u1ea3m xu\u1ed1ng kh\u00f4ng theo chu k\u1ef3 quay c\u1ee7a dao phay, t\u1ea1o ra m\u00e1ng s\u00f3ng v\u00e0 \u0111\u1ec9nh s\u00f3ng c\u1ee7a t\u00edn hi\u1ec7u l\u1ef1c phay. T\u1eeb d\u1ea1ng s\u00f3ng c\u1ee7a t\u00edn hi\u1ec7u l\u1ef1c phay, ch\u00fang ta c\u00f3 th\u1ec3 quan s\u00e1t th\u1ea5y c\u00e1c bi\u1ec3u hi\u1ec7n b\u1ea5t th\u01b0\u1eddng nh\u01b0 c\u1eaft v\u00e0 rung kh\u00f4ng \u0111\u1ec1u trong qu\u00e1 tr\u00ecnh gia c\u00f4ng.<\/p>\n\n\n\n

H\u00ecnh 3 l\u00e0 bi\u1ec3u \u0111\u1ed3 d\u1ea1ng s\u00f3ng c\u1ee7a t\u00edn hi\u1ec7u l\u1ef1c phay \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng th\u1eed nghi\u1ec7m, trong \u0111\u00f3 Fx l\u00e0 l\u1ef1c c\u1eaft ch\u00ednh, Fy l\u00e0 l\u1ef1c ti\u1ebfn dao v\u00e0 Fz l\u00e0 l\u1ef1c d\u1ecdc tr\u1ee5c. T\u1eeb d\u1ea1ng s\u00f3ng c\u1ee7a l\u1ef1c phay c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng bi\u00ean \u0111\u1ed9 c\u1ee7a l\u1ef1c d\u1ecdc tr\u1ee5c Fz l\u00e0 l\u1edbn nh\u1ea5t trong ba th\u00e0nh ph\u1ea7n c\u1ee7a qu\u00e1 tr\u00ecnh phay, l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi hai th\u00e0nh ph\u1ea7n c\u00f2n l\u1ea1i, ti\u1ebfp theo l\u00e0 l\u1ef1c c\u1eaft ch\u00ednh Fx v\u00e0 l\u1ef1c \u0103n dao nh\u1ecf nh\u1ea5t Fy. Nguy\u00ean nh\u00e2n l\u00e0 do \u0111\u1ed9 s\u00e2u phay AP trong phay vi r\u1ea5t nh\u1ecf, nh\u1ecf h\u01a1n nhi\u1ec1u so v\u1edbi b\u00e1n k\u00ednh cung \u0111\u1ea7u \u03b3 \u03b5 c\u1ee7a dao phay vi m\u00f4. Ch\u1ec9 m\u1ed9t ph\u1ea7n nh\u1ecf c\u1ee7a \u0111\u00e1y cung ch\u00f3p th\u1ef1c s\u1ef1 tham gia v\u00e0o qu\u00e1 tr\u00ecnh c\u1eaft, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi vi\u1ec7c c\u1eaft v\u1edbi g\u00f3c l\u1ec7ch ch\u00ednh nh\u1ecf, d\u1eabn \u0111\u1ebfn th\u00e0nh ph\u1ea7n l\u1ef1c phay d\u1ecdc tr\u1ee5c l\u1edbn.<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi m\u1ecdi chuy\u1ec3n \u0111\u1ed9ng quay c\u1ee7a dao phay, hai l\u01b0\u1ee1i c\u1eaft \u0111\u1ed1i x\u1ee9ng s\u1ebd tham gia c\u1eaft li\u00ean ti\u1ebfp, \u0111i\u1ec1u n\u00e0y cho th\u1ea5y hai \u0111\u1ec9nh s\u00f3ng trong chu k\u1ef3 t\u00edn hi\u1ec7u l\u1ef1c phay. T\u1eeb bi\u1ec3u \u0111\u1ed3 c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng bi\u00ean \u0111\u1ed9 c\u1ee7a hai c\u1ef1c \u0111\u1ea1i kh\u00f4ng gi\u1ed1ng nhau, v\u00e0 bi\u00ean \u0111\u1ed9 c\u1ee7a n\u1eeda chu k\u1ef3 \u0111\u1ea7u r\u00f5 r\u00e0ng l\u00e0 l\u1edbn h\u01a1n n\u1eeda sau. \u0110i\u1ec1u n\u00e0y cho th\u1ea5y trong qu\u00e1 tr\u00ecnh phay th\u1ef1c t\u1ebf, chi\u1ec1u d\u00e0y c\u1eaft c\u1ee7a hai l\u01b0\u1ee1i c\u1eaft c\u1ee7a dao phay l\u0103n r\u0103ng k\u00e9p l\u00e0 kh\u00e1c nhau, m\u1ed9t l\u01b0\u1ee1i c\u1eaft c\u00f3 nhi\u1ec1u v\u1eadt li\u1ec7u h\u01a1n, l\u01b0\u1ee1i c\u1eaft c\u00f2n l\u1ea1i \u00edt v\u1eadt li\u1ec7u h\u01a1n, d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng phay kh\u00f4ng \u0111\u1ec1u. Phay kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u nghi\u00eam tr\u1ecdng s\u1ebd g\u00e2y ra s\u1ef1 dao \u0111\u1ed9ng c\u1ee7a l\u1ef1c phay, l\u00e0m t\u0103ng \u0111\u1ed9 rung trong qu\u00e1 tr\u00ecnh gia c\u00f4ng, kh\u00f4ng c\u00f3 l\u1ee3i cho s\u1ef1 \u1ed5n \u0111\u1ecbnh c\u1ee7a vi phay.<\/p>\n\n\n\n

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

H\u00ecnh 3 d\u1ea1ng s\u00f3ng t\u00edn hi\u1ec7u l\u1ef1c phay vi m\u00f4<\/p>\n\n\n\n

The milling forces under different micro milling parameters are recorded during \ufe63 test. The peak value of milling force corresponding to the maximum cutting thickness in the tool rotation cycle is taken as the test result, and the measurement results of X, y and Z components are shown in Figure 4. At the same milling depth, the milling force increases with the increase of the feed rate FZ of each tooth. The main cutting force Fx and the feed force Fy rise relatively gently. When the milling depth is ap=2 m and 4 m, the main cutting force Fx rises from 0.44N and 0.92N to 1.34N and 2.05N respectively, and the feed force Fy increases from the 1.34N and the second to the “Ho” and “the”; the axial force increases by a large amplitude, from the “Qi” and “the” to “the”. Similarly, the increase of milling depth will also lead to the increase of milling force. The axial force FZ in the three-way component is sensitive to the milling parameters. The reason is that the feed rate of each tooth FZ in micro milling is smaller than the edge arc radius \u03b3 \u03b2 of the micro milling cutter, which makes the contact area between the back face of the bottom edge of the micro milling cutter and the workpiece relatively large, and the friction force on the back face accounts for a large proportion in the milling force.<\/p>\n\n\n\n

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

H\u00ecnh 4 \u0111\u01b0\u1eddng cong thay \u0111\u1ed5i l\u1ef1c phay v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 gia c\u00f4ng<\/strong><\/strong><\/p>\n\n\n\n

Ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t<\/strong> c\u1ee7a PCD vi phay<\/h2>\n\n\n\n

Cacbua xi m\u0103ng l\u00e0 m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u c\u1ee9ng gi\u00f2n. Trong ph\u01b0\u01a1ng ph\u00e1p c\u1eaft truy\u1ec1n th\u1ed1ng, v\u1eadt li\u1ec7u gi\u00f2n c\u1ee9ng th\u01b0\u1eddng b\u1ecb lo\u1ea1i b\u1ecf d\u01b0\u1edbi d\u1ea1ng \u0111\u1ee9t g\u00e3y gi\u00f2n, d\u1eabn \u0111\u1ebfn c\u00e1c khuy\u1ebft t\u1eadt h\u01b0 h\u1ecfng gi\u00f2n tr\u00ean b\u1ec1 m\u1eb7t gia c\u00f4ng v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t gia c\u00f4ng. K\u1ebft qu\u1ea3 cho th\u1ea5y r\u1eb1ng khi c\u00e1c th\u00f4ng s\u1ed1 gia c\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t \u0111\u1ec3 chi\u1ec1u d\u00e0y c\u1eaft nh\u1ecf h\u01a1n m\u1ed9t gi\u00e1 tr\u1ecb t\u1edbi h\u1ea1n nh\u1ea5t \u0111\u1ecbnh, v\u1eadt li\u1ec7u gi\u00f2n c\u0169ng c\u00f3 th\u1ec3 c\u00f3 bi\u1ebfn d\u1ea1ng d\u1ebbo, v\u00e0 b\u1ec1 m\u1eb7t gia c\u00f4ng c\u00f3 \u0111\u1ed9 d\u1ebbo m\u1ecbn, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u1eaft d\u1ec5 u\u1ed1n. H\u00ecnh 5 cho th\u1ea5y h\u00ecnh th\u00e1i b\u1ec1 m\u1eb7t v\u00e0 \u0111\u01b0\u1eddng cong bi\u00ean d\u1ea1ng c\u1ee7a cacbua xim\u0103ng \u0111\u01b0\u1ee3c nghi\u1ec1n vi m\u00f4 \u1edf AP = 2 \u03bc m v\u00e0 FZ = 1,2 \u03bc M. T\u1eeb h\u00ecnh n\u00e0y c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng h\u00ecnh th\u00e1i b\u1ec1 m\u1eb7t gia c\u00f4ng ch\u1ee7 y\u1ebfu l\u00e0 s\u1ef1 ph\u1ea3n \u00e1nh c\u1ee7a h\u00ecnh h\u1ecdc d\u1ee5ng c\u1ee5, v\u1edbi d\u1ee5ng c\u1ee5 r\u00f5 r\u00e0ng \u0111\u00e1nh d\u1ea5u k\u1ebft c\u1ea5u ph\u00e2n ph\u1ed1i. T\u1eeb \u0111\u01b0\u1eddng cong \u0111\u01b0\u1eddng bao, c\u00f3 th\u1ec3 quan s\u00e1t \u0111\u01b0\u1ee3c d\u1ea5u v\u1ebft \u0103n dao c\u1ee7a r\u0103ng d\u1ee5ng c\u1ee5, v\u00e0 h\u1ea7u nh\u01b0 kh\u00f4ng c\u00f3 khuy\u1ebft t\u1eadt h\u1ecfng gi\u00f2n. Trong phay vi m\u00f4, chi\u1ec1u d\u00e0y c\u1eaft th\u1ef1c t\u1ebf l\u00e0 r\u1ea5t nh\u1ecf, c\u00f3 th\u1ec3 nh\u1eadn ra \u0111\u01b0\u1eddng c\u1eaft d\u1ec5 u\u1ed1n c\u1ee7a cacbua xi m\u0103ng. V\u1eadt li\u1ec7u cacbua xi m\u0103ng \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf theo c\u00e1ch bi\u1ebfn d\u1ea1ng d\u1ebbo \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t gia c\u00f4ng t\u1ed1t.<\/p>\n\n\n\n

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

\uff08A\uff09 h\u00ecnh h\u1ecdc c\u1ee7a b\u1ec1 m\u1eb7t<\/p>\n\n\n\n

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

(b) \u0111\u01b0\u1eddng \u0111\u1ed3ng m\u1ee9c<\/p>\n\n\n\n

H\u00ecnh 5 h\u00ecnh th\u00e1i v\u00e0 bi\u00ean d\u1ea1ng b\u1ec1 m\u1eb7t gia c\u00f4ng<\/strong><\/strong><\/p>\n\n\n\n

H\u00ecnh 6 cho th\u1ea5y \u0111\u01b0\u1eddng cong c\u1ee7a \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t Ra c\u1ee7a cacbua xi m\u0103ng phay vi m\u00f4 v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 gia c\u00f4ng. Qua h\u00ecnh v\u1ebd c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng gi\u00e1 tr\u1ecb Ra c\u1ee7a \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t gia c\u00f4ng c\u1ee7a cacbua xi m\u0103ng l\u00e0 r\u1ea5t nh\u1ecf do s\u1ef1 c\u1eaft d\u1ec5 u\u1ed1n trong phay vi m\u00f4. \u0110\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t Ra t\u0103ng khi t\u0103ng l\u01b0\u1ee3ng ti\u1ebfn dao tr\u00ean m\u1ed7i r\u0103ng AP v\u00e0 chi\u1ec1u s\u00e2u phay FZ, nh\u01b0ng \u1ea3nh h\u01b0\u1edfng c\u1ee7a b\u01b0\u1edbc ti\u1ebfn tr\u00ean m\u1ed7i r\u0103ng \u0111\u1ebfn \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t l\u1edbn h\u01a1n so v\u1edbi chi\u1ec1u s\u00e2u phay. Khi AP = 2 \u03bc m v\u00e0 FZ = 0,3 \u03bc m, \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t nh\u1ecf nh\u1ea5t l\u00e0 0,073 \u03bc m; khi AP = 4 \u03bc m v\u00e0 FZ = 1,5 \u03bc m, \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t l\u1edbn nh\u1ea5t l\u00e0 0,151 \u03bc M.<\/p>\n\n\n\n

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

(b) \u0111\u01b0\u1eddng vi\u1ec1n<\/p>\n\n\n\n

Nh\u00e2n v\u00e2\u0323t <\/strong>6<\/strong> h\u00ecnh d\u1ea1ng v\u00e0 \u0111\u01b0\u1eddng vi\u1ec1n c\u1ee7a b\u1ec1 m\u1eb7t gia c\u00f4ng<\/strong><\/strong><\/p>\n\n\n\n

H\u00ecnh 6 cho th\u1ea5y \u0111\u01b0\u1eddng cong thay \u0111\u1ed5i \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t Ra c\u1ee7a cacbua xim\u0103ng phay vi m\u00f4 v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 gia c\u00f4ng. Qua h\u00ecnh v\u1ebd c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng gi\u00e1 tr\u1ecb Ra c\u1ee7a \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t gia c\u00f4ng c\u1ee7a cacbua xi m\u0103ng l\u00e0 r\u1ea5t nh\u1ecf do s\u1ef1 c\u1eaft d\u1ec5 u\u1ed1n trong phay vi m\u00f4. \u0110\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t Ra t\u0103ng khi t\u0103ng l\u01b0\u1ee3ng ti\u1ebfn dao tr\u00ean m\u1ed7i r\u0103ng AP v\u00e0 chi\u1ec1u s\u00e2u phay FZ, nh\u01b0ng \u1ea3nh h\u01b0\u1edfng c\u1ee7a b\u01b0\u1edbc ti\u1ebfn tr\u00ean m\u1ed7i r\u0103ng \u0111\u1ebfn \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t l\u1edbn h\u01a1n so v\u1edbi chi\u1ec1u s\u00e2u phay. Khi AP = 2 \u03bc m v\u00e0 FZ = 0,3 \u03bc m, \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t nh\u1ecf nh\u1ea5t l\u00e0 0,073 \u03bc m; khi AP = 4 \u03bc m v\u00e0 FZ = 1,5 \u03bc m, \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t l\u1edbn nh\u1ea5t l\u00e0 0,151 \u03bc M.<\/p>\n\n\n\n

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

(a) (b)<\/p>\n\n\n\n

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

(c)<\/p>\n\n\n\n

S\u01a1 \u0111\u1ed3.7 h\u00ecnh h\u1ecdc vi m\u00f4 c\u1ee7a m\u00e0i m\u00f2n tr\u00ean d\u1ee5ng c\u1ee5 c\u1eaft<\/p>\n\n\n\n

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

S\u01a1 \u0111\u1ed3 8 \u1ea3nh h\u01b0\u1edfng c\u1ee7a chi\u1ec1u d\u00e0i phay \u0111\u1ebfn \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t <\/p>\n\n\n\n

H\u00ecnh 8 cho th\u1ea5y \u0111\u01b0\u1eddng cong thay \u0111\u1ed5i \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t theo \u0111\u01b0\u1eddng phay vi m\u00f4. Qua h\u00ecnh v\u1ebd c\u00f3 th\u1ec3 th\u1ea5y \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t Ra t\u0103ng d\u1ea7n theo chi\u1ec1u t\u0103ng c\u1ee7a \u0111\u01b0\u1eddng phay. Khi c\u1ef1 ly phay \u0111\u1ea1t 700m m, \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t t\u0103ng l\u00ean r\u1ea5t nhi\u1ec1u; khi kho\u1ea3ng c\u00e1ch phay v\u01b0\u1ee3t qu\u00e1 700mm, s\u1ef1 gia t\u0103ng \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t ch\u1eadm l\u1ea1i; Khi chi\u1ec1u d\u00e0i phay l\u00e0 1000mm, \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t Ra \u0111\u1ea1t 0,224 \u03bc M. Sau khi m\u00e0i m\u00f2n dao, kh\u00f4ng ch\u1ec9 l\u1ef1c phay t\u0103ng l\u00ean m\u00e0 l\u1ef1c \u0111\u00f9n v\u00e0 ma s\u00e1t c\u1ee7a ph\u00f4i c\u0169ng tr\u1edf n\u00ean nghi\u00eam tr\u1ecdng h\u01a1n, l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng h\u1ecfng gi\u00f2n c\u1ee7a xi m\u0103ng. v\u1eadt li\u1ec7u cacbua, g\u00e2y ra c\u00e1c khuy\u1ebft t\u1eadt h\u01b0 h\u1ecfng gi\u00f2n tr\u00ean b\u1ec1 m\u1eb7t gia c\u00f4ng, l\u00e0m x\u1ea5u ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t gia c\u00f4ng v\u00e0 l\u00e0m t\u0103ng \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t.<\/p>\n\n\n\n

K\u1ebft lu\u1eadn cho \u0111\u1ebfn nay<\/strong><\/strong><\/h2>\n\n\n\n

(1) b\u1edfi v\u00ec chi\u1ec1u s\u00e2u phay nh\u1ecf h\u01a1n nhi\u1ec1u so v\u1edbi b\u00e1n k\u00ednh c\u1ee7a cung \u0111\u1ec9nh, ch\u1ec9 c\u00f3 \u0111\u00e1y c\u1ee7a cung \u0111\u1ec9nh th\u1ef1c s\u1ef1 tham gia v\u00e0o qu\u00e1 tr\u00ecnh c\u1eaft, d\u1eabn \u0111\u1ebfn th\u00e0nh ph\u1ea7n d\u1ecdc tr\u1ee5c l\u1edbn. Trong qu\u00e1 tr\u00ecnh phay vi m\u00f4 c\u1ee7a dao phay hai r\u0103ng tr\u00e1ng kim c\u01b0\u01a1ng, c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng phay kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u, v\u00e0 l\u1ef1c phay t\u0103ng khi l\u01b0\u1ee3ng ti\u1ebfn dao tr\u00ean m\u1ed7i r\u0103ng v\u00e0 chi\u1ec1u s\u00e2u phay t\u0103ng l\u00ean.<\/p>\n\n\n\n

(2) phay vi m\u00f4 l\u00e0 r\u1ea5t nh\u1ecf, c\u00f3 th\u1ec3 nh\u1eadn ra s\u1ef1 c\u1eaft d\u1ebbo c\u1ee7a cacbua xi m\u0103ng v\u00e0 c\u00f3 \u0111\u01b0\u1ee3c ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t gia c\u00f4ng t\u1ed1t. \u0110\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t Ra t\u0103ng khi t\u0103ng l\u01b0\u1ee3ng ti\u1ebfn dao tr\u00ean m\u1ed7i r\u0103ng v\u00e0 chi\u1ec1u s\u00e2u phay.<\/p>\n\n\n\n

(3) d\u1eabn \u0111\u1ebfn m\u00e0i m\u00f2n kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u c\u1ee7a hai l\u01b0\u1ee1i v\u00e0 m\u00e0i m\u00f2n nghi\u00eam tr\u1ecdng c\u1ee7a c\u00e1c l\u01b0\u1ee1i mang. \u0110\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t t\u0103ng c\u00f9ng v\u1edbi s\u1ef1 gia t\u0103ng c\u1ee7a \u0111\u01b0\u1eddng phay.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Cemented carbide has the edge of high hardness, good wear resistance, corrosion resistance and a small coefficient of thermal expansion. It is widely used in the manufacture of precision molds such as optical glass forming, metal drawing, and wear-resistant and corrosion-resistant parts. Cemented carbide mold not only has a long service life, more than ten times…<\/p>","protected":false},"author":2,"featured_media":19290,"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\/11\/\u56fe\u72471-2.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/3872"}],"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=3872"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/3872\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media\/19290"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=3872"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=3872"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=3872"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}