{"id":20340,"date":"2021-02-18T02:15:11","date_gmt":"2021-02-18T02:15:11","guid":{"rendered":"https:\/\/www.meetyoucarbide.com\/?p=20340"},"modified":"2021-10-11T06:06:28","modified_gmt":"2021-10-11T06:06:28","slug":"this-is-the-most-concise-intro-ever-about-twist-drill-grinding","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/this-is-the-most-concise-intro-ever-about-twist-drill-grinding\/","title":{"rendered":"\u0110\u00e2y l\u00e0 ph\u1ea7n gi\u1edbi thi\u1ec7u ng\u1eafn g\u1ecdn nh\u1ea5t t\u1eebng c\u00f3 v\u1ec1 m\u00e1y m\u00e0i m\u0169i khoan xo\u1eafn"},"content":{"rendered":"
\n

M\u0169i khoan xo\u1eafn l\u00e0 d\u1ee5ng c\u1ee5 khoan th\u00f4ng d\u1ee5ng, c\u00f3 c\u1ea5u t\u1ea1o \u0111\u01a1n gi\u1ea3n. Vi\u1ec7c m\u00e0i m\u0169i khoan t\u1ed1t \u0111\u1ec3 gia c\u00f4ng ph\u00f4i l\u00e0 r\u1ea5t quan tr\u1ecdng, nh\u01b0ng m\u00e0i t\u1ed1t m\u0169i khoan \u0111\u00f3 kh\u00f4ng h\u1ec1 \u0111\u01a1n gi\u1ea3n. \u0110i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i th\u00e0nh th\u1ea1o c\u00e1c ph\u01b0\u01a1ng ph\u00e1p v\u00e0 k\u1ef9 n\u0103ng m\u00e0i. N\u1ebfu ch\u00fang ta n\u1eafm v\u1eefng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p m\u00e0i v\u00e0 kinh nghi\u1ec7m nhi\u1ec1u l\u1ea7n, ch\u00fang ta c\u00f3 th\u1ec3 l\u00e0m ch\u1ee7 quy m\u00f4 m\u00e0i c\u1ee7a m\u0169i khoan.<\/p>\n\n\n\n

Quy tr\u00ecnh m\u00e0i m\u0169i khoan xo\u1eafn<\/h2>\n\n\n\n


G\u00f3c tr\u00ean c\u1ee7a m\u0169i khoan xo\u1eafn n\u00f3i chung l\u00e0 118\u00b0, c\u0169ng c\u00f3 th\u1ec3 coi l\u00e0 120\u00b0. M\u00e1y khoan m\u00e0i c\u00f3 th\u1ec3 th\u00e0nh th\u1ea1o s\u00e1u k\u1ef9 n\u0103ng sau \u0111\u00e2y, n\u00f3i chung l\u00e0 kh\u00f4ng c\u00f3 v\u1ea5n \u0111\u1ec1 g\u00ec.<\/p>\n\n\n\n

Tr\u01b0\u1edbc khi m\u00e0i m\u0169i khoan, l\u01b0\u1ee1i c\u1eaft ch\u00ednh c\u1ee7a m\u0169i khoan v\u00e0 b\u1ec1 m\u1eb7t b\u00e1nh m\u00e0i ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1eb7t tr\u00ean m\u1ed9t m\u1eb7t ph\u1eb3ng n\u1eb1m ngang, ngh\u0129a l\u00e0 khi l\u01b0\u1ee1i c\u1eaft ti\u1ebfp x\u00fac v\u1edbi b\u1ec1 m\u1eb7t b\u00e1nh m\u00e0i, to\u00e0n b\u1ed9 c\u1ea1nh ph\u1ea3i \u0111\u01b0\u1ee3c m\u00e0i. \u0110\u00e2y l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean c\u1ee7a v\u1ecb tr\u00ed t\u01b0\u01a1ng \u0111\u1ed1i c\u1ee7a m\u0169i khoan v\u00e0 \u0111\u00e1 m\u00e0i. Sau khi \u0111\u1eb7t v\u1ecb tr\u00ed, t\u1eeb t\u1eeb d\u1ef1a v\u00e0o b\u1ec1 m\u1eb7t b\u00e1nh m\u00e0i.<\/p>\n\n\n\n

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

G\u00f3c n\u00e0y l\u00e0 g\u00f3c ph\u00eda tr\u01b0\u1edbc c\u1ee7a bit. N\u1ebfu g\u00f3c kh\u00f4ng \u0111\u00fang, n\u00f3 s\u1ebd \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn k\u00edch th\u01b0\u1edbc c\u1ee7a g\u00f3c tr\u00ean c\u00f9ng c\u1ee7a bit, h\u00ecnh d\u1ea1ng c\u1ee7a l\u01b0\u1ee1i c\u1eaft ch\u00ednh v\u00e0 g\u00f3c c\u1ee7a c\u1ea1nh ch\u00e9o. \u1ede \u0111\u00e2y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ed1i quan h\u1ec7 v\u1ecb tr\u00ed gi\u1eefa \u0111\u01b0\u1eddng tr\u1ee5c khoan v\u00e0 b\u1ec1 m\u1eb7t b\u00e1nh m\u00e0i, l\u1ea5y 60 \u00b0 tr\u00ean \u0111\u01b0\u1eddng, g\u00f3c n\u00e0y th\u01b0\u1eddng ch\u00ednh x\u00e1c h\u01a1n. \u1ede \u0111\u00e2y, ch\u00fang ta n\u00ean ch\u00fa \u00fd \u0111\u1ebfn v\u1ecb tr\u00ed ngang t\u01b0\u01a1ng \u0111\u1ed1i v\u00e0 v\u1ecb tr\u00ed g\u00f3c c\u1ee7a bit tr\u01b0\u1edbc khi m\u00e0i, v\u00e0 c\u1ea3 hai \u0111\u1ec1u ph\u1ea3i \u0111\u01b0\u1ee3c t\u00ednh \u0111\u1ebfn. Kh\u00f4ng b\u1ecf qua c\u00e0i \u0111\u1eb7t g\u00f3c \u0111\u1ed9 \u0111\u1ec3 c\u00e2n b\u1eb1ng c\u1ea1nh ho\u1eb7c b\u1ecf qua c\u00e0i \u0111\u1eb7t c\u1ea1nh \u0111\u1ec3 c\u00e0i \u0111\u1eb7t g\u00f3c.<\/p>\n\n\n\n

Sau khi l\u01b0\u1ee1i c\u1eaft ti\u1ebfp x\u00fac v\u1edbi \u0111\u00e1 m\u00e0i, n\u00ean m\u00e0i t\u1eeb l\u01b0\u1ee1i c\u1eaft ch\u00ednh ra ph\u00eda sau, ngh\u0129a l\u00e0 l\u01b0\u1ee1i c\u1eaft c\u1ee7a m\u0169i khoan ti\u1ebfp x\u00fac v\u1edbi \u0111\u00e1 m\u00e0i tr\u01b0\u1edbc, sau \u0111\u00f3 m\u00e0i t\u1eeb t\u1eeb d\u1ecdc theo to\u00e0n b\u1ed9 s\u01b0\u1eddn. Khi m\u0169i khoan c\u1eaft v\u00e0o, n\u00f3 c\u00f3 th\u1ec3 nh\u1eb9 nh\u00e0ng ti\u1ebfp x\u00fac v\u1edbi b\u00e1nh m\u00e0i, tr\u01b0\u1edbc ti\u00ean h\u00e3y m\u00e0i m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf c\u1ea1nh, quan s\u00e1t \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u c\u1ee7a tia l\u1eeda, \u0111i\u1ec1u ch\u1ec9nh \u00e1p su\u1ea5t tr\u00ean tay k\u1ecbp th\u1eddi v\u00e0 ch\u00fa \u00fd \u0111\u1ebfn vi\u1ec7c l\u00e0m m\u00e1t m\u0169i khoan, v\u00ec v\u1eady \u0111\u1ec3 kh\u00f4ng m\u00e0i m\u0169i khoan qu\u00e1 m\u1ee9c, g\u00e2y \u0111\u1ed5i m\u00e0u v\u00e0 \u1ee7 c\u1ea1nh. Khi nhi\u1ec7t \u0111\u1ed9 c\u1ee7a l\u01b0\u1ee1i c\u1eaft cao, bit ph\u1ea3i \u0111\u01b0\u1ee3c l\u00e0m m\u00e1t k\u1ecbp th\u1eddi.<\/p>\n\n\n\n

\u0110\u00e2y l\u00e0 m\u1ed9t h\u00e0nh \u0111\u1ed9ng m\u00e0i khoan ti\u00eau chu\u1ea9n. L\u01b0\u1ee1i c\u1eaft ch\u00ednh ph\u1ea3i xoay l\u00ean xu\u1ed1ng tr\u00ean b\u00e1nh m\u00e0i, ngh\u0129a l\u00e0 tay c\u1ea7m ph\u00eda tr\u01b0\u1edbc m\u0169i khoan ph\u1ea3i xoay \u0111\u1ec1u m\u0169i khoan l\u00ean xu\u1ed1ng tr\u00ean b\u1ec1 m\u1eb7t b\u00e1nh m\u00e0i. Nh\u01b0ng tay c\u1ea7m tay c\u1ea7m kh\u00f4ng th\u1ec3 xoay, v\u00e0 tay c\u1ea7m ph\u00eda sau ph\u1ea3i \u0111\u01b0\u1ee3c ng\u0103n kh\u00f4ng cho cong l\u00ean, ngh\u0129a l\u00e0, \u0111u\u00f4i c\u1ee7a m\u0169i khoan kh\u00f4ng \u0111\u01b0\u1ee3c cong tr\u00ean \u0111\u01b0\u1eddng t\u00e2m n\u1eb1m ngang c\u1ee7a b\u00e1nh m\u00e0i, n\u1ebfu kh\u00f4ng c\u1ea1nh s\u1ebd b\u1ecb c\u00f9n v\u00e0 kh\u00f4ng c\u1eaft \u0111\u01b0\u1ee3c. \u0110\u00e2y l\u00e0 b\u01b0\u1edbc quan tr\u1ecdng nh\u1ea5t. Vi\u1ec7c m\u0169i khoan c\u00f3 \u0111\u01b0\u1ee3c m\u00e0i t\u1ed1t hay kh\u00f4ng c\u00f3 li\u00ean quan r\u1ea5t nhi\u1ec1u \u0111\u1ebfn n\u00f3. Khi m\u00e0i g\u1ea7n xong, b\u1eaft \u0111\u1ea7u t\u1eeb c\u1ea1nh v\u00e0 ch\u00e0 nh\u1eb9 g\u00f3c sau \u0111\u1ec3 m\u1eb7t sau c\u1ee7a c\u1ea1nh m\u1ecbn h\u01a1n.<\/p>\n\n\n\n

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

After grinding one edge, grind the other edge again. The edge must be in the middle of the drill axis, and the edges on both sides should be symmetrical. The experienced master will observe the symmetry of the drill point in front of the bright light and slowly grind it. The back angle of the cutting edge of the bit is generally 10 \u00b0 – 14 \u00b0 with large back angle, the cutting edge is too thin, the vibration is severe during drilling, the orifice is trilateral or pentagonal, and the chip is needle shaped; with small back angle, the axial force is very large during drilling, it is difficult to cut in, the cutting force increases, the temperature rises greatly, and the bit heats seriously, or even cannot drill. The back angle grinding is suitable, the front point is in the center, and the two edges are symmetrical. When drilling, the bit can discharge chips quickly, without vibration, and the hole diameter will not expand.<\/p>\n\n\n\n

Sau khi hai c\u1ea1nh \u0111\u01b0\u1ee3c m\u00e0i, \u0111\u1ea7u bit n\u00ean \u0111\u01b0\u1ee3c m\u00e0i cho bit c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n. Sau khi hai c\u1ea1nh c\u1ee7a m\u0169i khoan \u0111\u01b0\u1ee3c m\u00e0i, \u1edf \u0111\u1ea7u c\u1ee7a hai c\u1ea1nh s\u1ebd c\u00f3 m\u1ed9t m\u1eb7t ph\u1eb3ng, \u0111i\u1ec1u n\u00e0y s\u1ebd \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c \u0111\u1ecbnh v\u1ecb t\u00e2m c\u1ee7a m\u0169i khoan. C\u1ea7n \u0111\u1ea3o ng\u01b0\u1ee3c g\u00f3c sau m\u00e9p \u0111\u1ec3 l\u00e0m cho m\u1eb7t ph\u1eb3ng c\u1ee7a \u0111\u1ea7u c\u00e0ng nh\u1ecf c\u00e0ng t\u1ed1t. Ph\u01b0\u01a1ng ph\u00e1p l\u00e0 d\u1ef1ng m\u0169i khoan, c\u0103n ch\u1ec9nh v\u1edbi g\u00f3c c\u1ee7a \u0111\u00e1 m\u00e0i v\u00e0 kho\u00e9t m\u1ed9t r\u00e3nh nh\u1ecf \u1edf g\u1ed1c sau m\u00e9p \u0111\u1ebfn \u0111\u1ea7u m\u00e9p. \u0110\u00e2y c\u0169ng l\u00e0 m\u1ed9t \u0111i\u1ec3m quan tr\u1ecdng c\u1ee7a \u0111\u1ecbnh t\u00e2m bit v\u00e0 t\u1ed1c \u0111\u1ed9 c\u1eaft. L\u01b0u \u00fd khi m\u00e0i v\u00e1t c\u1ea1nh c\u1ee7a m\u0169i c\u1ea1nh kh\u00f4ng bao gi\u1edd \u0111\u01b0\u1ee3c m\u00e0i v\u00e0o l\u01b0\u1ee1i c\u1eaft ch\u00ednh, \u0111i\u1ec1u n\u00e0y s\u1ebd l\u00e0m cho g\u00f3c c\u00e0o c\u1ee7a l\u01b0\u1ee1i c\u1eaft ch\u00ednh l\u1edbn h\u01a1n v\u00e0 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn vi\u1ec7c khoan.
Th\u1eadn tr\u1ecdng khi m\u00e0i m\u0169i khoan xo\u1eafn<\/p>\n\n\n\n

L\u01b0u \u00fd khi m\u00e0i m\u0169i khoan xo\u1eafn<\/h2>\n\n\n\n

N\u00f3i chung, b\u00e1nh m\u00e0i c\u00f3 k\u00edch th\u01b0\u1edbc h\u1ea1t t\u1eeb 46 ~ 80 l\u01b0\u1edbi v\u00e0 \u0111\u1ed9 c\u1ee9ng thu\u1ed9c lo\u1ea1i m\u1ec1m trung b\u00ecnh l\u00e0 ph\u00f9 h\u1ee3p \u0111\u1ec3 m\u00e0i m\u0169i khoan. B\u00e1nh m\u00e0i ph\u1ea3i ch\u1ea1y tr\u01a1n tru, b\u00e1nh m\u00e0i c\u00f3 \u0111\u1ed9 \u0111\u1ea3o l\u1edbn ph\u1ea3i \u0111\u01b0\u1ee3c c\u1eaft b\u1edbt. \u0110\u1ec3 m\u00e0i m\u1ecbn c\u1ea1nh ch\u00e9o c\u1ee7a bit, g\u00f3c ngo\u00e0i c\u1ee7a b\u00e1nh m\u00e0i ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u00e1nh b\u00f3ng v\u1edbi b\u00e1n k\u00ednh phi l\u00ea nh\u1ecf h\u01a1n. N\u1ebfu b\u00e1n k\u00ednh phi l\u00ea qu\u00e1 l\u1edbn, l\u01b0\u1ee1i c\u1eaft ch\u00ednh s\u1ebd b\u1ecb h\u1ecfng khi m\u00e0i c\u1ea1nh ch\u00e9o.<\/p>\n\n\n\n

Khi bit \u0111\u01b0\u1ee3c l\u00e0m m\u00e1t, \u00e1p su\u1ea5t do bit t\u1ea1o ra trong qu\u00e1 tr\u00ecnh m\u00e0i kh\u00f4ng \u0111\u01b0\u1ee3c qu\u00e1 l\u1edbn. N\u00f3i chung, l\u00e0m m\u00e1t kh\u00f4ng kh\u00ed \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. N\u1ebfu c\u1ea7n, n\u00ean nh\u00fang n\u00f3 v\u00e0o n\u01b0\u1edbc \u0111\u1ec3 tr\u00e1nh qu\u00e1 tr\u00ecnh \u1ee7 qu\u00e1 n\u00f3ng v\u00e0 gi\u1ea3m \u0111\u1ed9 c\u1ee9ng c\u1ee7a ph\u1ea7n c\u1eaft c\u1ee7a m\u0169i khoan.
ba C\u1ea1nh ngang c\u1ee7a m\u0169i khoan xo\u1eafn ti\u00eau chu\u1ea9n d\u00e0i, th\u01b0\u1eddng l\u00e0 0,18d (d l\u00e0 \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a m\u0169i khoan) v\u00e0 g\u00f3c c\u00e0o \u1edf c\u1ea1nh ngang c\u00f3 gi\u00e1 tr\u1ecb \u00e2m l\u1edbn. Do \u0111\u00f3, khi khoan, v\u1ebft c\u1eaft \u1edf c\u1ea1nh ngang \u1edf tr\u1ea1ng th\u00e1i \u0111\u00f9n v\u00e0 l\u1ef1c c\u1ea3n d\u1ecdc tr\u1ee5c l\u1edbn. \u0110\u1ed3ng th\u1eddi, n\u1ebfu c\u1ea1nh ngang d\u00e0i, hi\u1ec7u qu\u1ea3 \u0111\u1ecbnh t\u00e2m v\u00e0 \u1ed5n \u0111\u1ecbnh c\u1eaft c\u1ee7a n\u00f3 kh\u00f4ng t\u1ed1t. Do \u0111\u00f3, \u0111\u1ed1i v\u1edbi m\u0169i khoan c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n 5 mm, c\u1ea1nh ngang ph\u1ea3i \u0111\u01b0\u1ee3c n\u1ed1i \u0111\u1ea5t ng\u1eafn v\u00e0 g\u00f3c c\u00e0o g\u1ea7n c\u1ea1nh ngang ph\u1ea3i \u0111\u01b0\u1ee3c t\u0103ng l\u00ean m\u1ed9t c\u00e1ch th\u00edch h\u1ee3p, \u0111\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t c\u1eaft c\u1ee7a m\u0169i khoan.
Vi\u1ec7c m\u00e0i c\u1ea1nh ch\u00e9o ph\u1ea3i \u0111\u01b0\u1ee3c ho\u00e0n th\u00e0nh. M\u1ee5c \u0111\u00edch c\u1ee7a vi\u1ec7c m\u00e0i c\u1ea1nh ch\u00e9o l\u00e0 \u0111\u1ec3 r\u00fat ng\u1eafn c\u1ea1nh ch\u00e9o, nh\u01b0ng c\u1ea1nh ch\u00e9o kh\u00f4ng \u0111\u01b0\u1ee3c qu\u00e1 ng\u1eafn. C\u1ea1nh ch\u00e9o qu\u00e1 ng\u1eafn kh\u00f4ng th\u1ec3 l\u00e0m gi\u1ea3m s\u1ee9c c\u1ea3n c\u1ee7a ngu\u1ed3n c\u1ea5p d\u1eef li\u1ec7u. Trong qu\u00e1 tr\u00ecnh c\u1eaft c\u1ea1nh ch\u00e9o, g\u00f3c c\u00e0o \u00e2m \u1edf c\u1ea3 hai b\u00ean c\u1ee7a c\u1ea1nh ch\u00e9o ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u00e1nh b\u00f3ng c\u00e0ng nhi\u1ec1u c\u00e0ng t\u1ed1t. N\u1ebfu t\u0103ng g\u00f3c c\u00e0o \u0111\u00fang c\u00e1ch, l\u1ef1c c\u1ea3n c\u1eaft trong qu\u00e1 tr\u00ecnh c\u1eaft c\u00f3 th\u1ec3 gi\u1ea3m v\u00e0 to\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh khoan s\u1ebd nh\u1eb9 nh\u00e0ng.<\/p>\n\n\n\n

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

Khi bit \u0111\u01b0\u1ee3c l\u00e0m m\u00e1t, \u00e1p su\u1ea5t do bit t\u1ea1o ra trong qu\u00e1 tr\u00ecnh m\u00e0i kh\u00f4ng \u0111\u01b0\u1ee3c qu\u00e1 l\u1edbn. N\u00f3i chung, l\u00e0m m\u00e1t kh\u00f4ng kh\u00ed \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. N\u1ebfu c\u1ea7n, n\u00ean nh\u00fang n\u00f3 v\u00e0o n\u01b0\u1edbc \u0111\u1ec3 tr\u00e1nh qu\u00e1 tr\u00ecnh \u1ee7 qu\u00e1 n\u00f3ng v\u00e0 gi\u1ea3m \u0111\u1ed9 c\u1ee9ng c\u1ee7a ph\u1ea7n c\u1eaft c\u1ee7a m\u0169i khoan.
ba C\u1ea1nh ngang c\u1ee7a m\u0169i khoan xo\u1eafn ti\u00eau chu\u1ea9n d\u00e0i, th\u01b0\u1eddng l\u00e0 0,18d (d l\u00e0 \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a m\u0169i khoan) v\u00e0 g\u00f3c c\u00e0o \u1edf c\u1ea1nh ngang c\u00f3 gi\u00e1 tr\u1ecb \u00e2m l\u1edbn. Do \u0111\u00f3, khi khoan, v\u1ebft c\u1eaft \u1edf c\u1ea1nh ngang \u1edf tr\u1ea1ng th\u00e1i \u0111\u00f9n v\u00e0 l\u1ef1c c\u1ea3n d\u1ecdc tr\u1ee5c l\u1edbn. \u0110\u1ed3ng th\u1eddi, n\u1ebfu c\u1ea1nh ngang d\u00e0i, hi\u1ec7u qu\u1ea3 \u0111\u1ecbnh t\u00e2m v\u00e0 \u1ed5n \u0111\u1ecbnh c\u1eaft c\u1ee7a n\u00f3 kh\u00f4ng t\u1ed1t. Do \u0111\u00f3, \u0111\u1ed1i v\u1edbi m\u0169i khoan c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n 5 mm, c\u1ea1nh ngang ph\u1ea3i \u0111\u01b0\u1ee3c n\u1ed1i \u0111\u1ea5t ng\u1eafn v\u00e0 g\u00f3c c\u00e0o g\u1ea7n c\u1ea1nh ngang ph\u1ea3i \u0111\u01b0\u1ee3c t\u0103ng l\u00ean m\u1ed9t c\u00e1ch th\u00edch h\u1ee3p, \u0111\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t c\u1eaft c\u1ee7a m\u0169i khoan.
Vi\u1ec7c m\u00e0i c\u1ea1nh ch\u00e9o ph\u1ea3i \u0111\u01b0\u1ee3c ho\u00e0n th\u00e0nh. M\u1ee5c \u0111\u00edch c\u1ee7a vi\u1ec7c m\u00e0i c\u1ea1nh ch\u00e9o l\u00e0 \u0111\u1ec3 r\u00fat ng\u1eafn c\u1ea1nh ch\u00e9o, nh\u01b0ng c\u1ea1nh ch\u00e9o kh\u00f4ng \u0111\u01b0\u1ee3c qu\u00e1 ng\u1eafn. C\u1ea1nh ch\u00e9o qu\u00e1 ng\u1eafn kh\u00f4ng th\u1ec3 l\u00e0m gi\u1ea3m s\u1ee9c c\u1ea3n c\u1ee7a ngu\u1ed3n c\u1ea5p d\u1eef li\u1ec7u. Trong qu\u00e1 tr\u00ecnh c\u1eaft c\u1ea1nh ch\u00e9o, g\u00f3c c\u00e0o \u00e2m \u1edf c\u1ea3 hai b\u00ean c\u1ee7a c\u1ea1nh ch\u00e9o ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u00e1nh b\u00f3ng c\u00e0ng nhi\u1ec1u c\u00e0ng t\u1ed1t. N\u1ebfu t\u0103ng g\u00f3c c\u00e0o \u0111\u00fang c\u00e1ch, l\u1ef1c c\u1ea3n c\u1eaft trong qu\u00e1 tr\u00ecnh c\u1eaft c\u00f3 th\u1ec3 gi\u1ea3m v\u00e0 to\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh khoan s\u1ebd nh\u1eb9 nh\u00e0ng.<\/p>\n\n\n\n

N\u1ebfu m\u0169i khoan \u0111\u01b0\u1ee3c n\u1ea1p th\u1ee7 c\u00f4ng. G\u00f3c \u0111\u1ec9nh c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3m ph\u00f9 h\u1ee3p trong qu\u00e1 tr\u00ecnh m\u00e0i. Do \u00e1p su\u1ea5t n\u1ea1p c\u1ee7a m\u00e1y khoan c\u1ea7m tay \u0111i\u1ec7n kh\u00f4ng \u0111\u1ee7, n\u00ean vi\u1ec7c gi\u1ea3m g\u00f3c \u0111\u1ec9nh \u0111\u00fang c\u00e1ch c\u00f3 th\u1ec3 l\u00e0m t\u0103ng \u00e1p su\u1ea5t d\u01b0\u01a1ng c\u1ee7a l\u01b0\u1ee1i c\u1eaft tr\u00ean b\u1ec1 m\u1eb7t c\u1eaft.<\/p>\n\n\n\n

N\u1ebfu c\u00e1c y\u00eau c\u1ea7u v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 v\u00e0 \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t kh\u00f4ng qu\u00e1 nghi\u00eam ng\u1eb7t, th\u00ec hai c\u1ea1nh c\u1eaft c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c m\u00e0i th\u00e0nh \u0111\u1ed1i x\u1ee9ng kh\u00f4ng ho\u00e0n to\u00e0n. M\u1eb7c d\u00f9 \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 s\u1ebd t\u0103ng tr\u00ean c\u01a1 s\u1edf ban \u0111\u1ea7u trong qu\u00e1 tr\u00ecnh khoan, nh\u01b0ng r\u00f5 r\u00e0ng n\u00f3 c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m ma s\u00e1t gi\u1eefa c\u1ea1nh bit v\u00e0 th\u00e0nh l\u1ed7 v\u00e0 gi\u1ea3m l\u1ef1c c\u1eaft. Kh\u00f4ng c\u00f3 c\u00f4ng th\u1ee9c nghi\u00eam ng\u1eb7t \u0111\u1ec3 m\u00e0i m\u0169i khoan, m\u00e0 \u0111\u00f2i h\u1ecfi kinh nghi\u1ec7m x\u1eed l\u00fd t\u00edch l\u0169y d\u1ea7n d\u1ea7n trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh th\u1ef1c t\u1ebf, c\u00e1c th\u1eed nghi\u1ec7m l\u1eb7p \u0111i l\u1eb7p l\u1ea1i li\u00ean t\u1ee5c, so s\u00e1nh v\u00e0 quan s\u00e1t d\u1ea7n d\u1ea7n, \u0111\u1ec3 m\u0169i khoan c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c m\u00e0i t\u1ed1t.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Twist drill is a common drilling tool with simple structure. It is very important to sharpen the drill well for workpiece processing, but it is not easy to sharpen it well. The key is to master the grinding methods and skills. If we master the grinding methods and experience for many times, we can master…<\/p>","protected":false},"author":2,"featured_media":20343,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[92],"tags":[],"jetpack_featured_media_url":"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2021\/02\/u37370423744270713551fm26gp0.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/20340"}],"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=20340"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/20340\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media\/20343"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=20340"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=20340"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=20340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}