{"id":3632,"date":"2019-07-05T01:08:27","date_gmt":"2019-07-05T01:08:27","guid":{"rendered":"https:\/\/www.mcctcarbide.com\/?p=3632"},"modified":"2020-05-06T03:48:31","modified_gmt":"2020-05-06T03:48:31","slug":"why-turning-tools-corner-radius-or-edge-radius-so-critical","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/tai-sao-quay-cong-cu-goc-ban-kinh-hoac-ban-kinh-canh-rat-quan-trong\/","title":{"rendered":"T\u1ea1i sao Turn Radius's Corner Radius hay Edge Radius l\u1ea1i quan tr\u1ecdng nh\u01b0 v\u1eady?"},"content":{"rendered":"

\u0110\u01b0\u1ee3c th\u1ec3 hi\u1ec7n nh\u01b0 h\u00ecnh b\u00ean d\u01b0\u1edbi, b\u00e1n k\u00ednh g\u00f3c \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh b\u1edfi l\u01b0\u1ee1i c\u1eaft ch\u00ednh v\u00e0 c\u1ea1nh c\u1eaft ch\u00e9o, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 b\u00e1n k\u00ednh c\u1ea1nh.<\/p>

\"B\u00e1n<\/figure>


Trong qu\u00e1 tr\u00ecnh c\u1eaft g\u1ecdt, \u0111\u1ec3 n\u00e2ng cao \u0111\u1ed9 b\u1ec1n c\u1ee7a m\u0169i dao v\u00e0 gi\u1ea3m \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t c\u1ee7a m\u00e1y, \u1edf m\u0169i dao th\u01b0\u1eddng t\u1ed3n t\u1ea1i m\u1ed9t m\u00e9p chuy\u1ec3n cung tr\u00f2n. B\u00ean c\u1ea1nh \u0111\u00f3, l\u01b0\u1ee1i ki\u1ebfm kh\u00f4ng c\u00f3 v\u00f2ng quay n\u00f3i chung c\u00f3 h\u00ecnh cung chuy\u1ec3n ti\u1ebfp v\u1edbi b\u00e1n k\u00ednh nh\u1ea5t \u0111\u1ecbnh. M\u1eb7c d\u00f9 \u0111\u1ed1i v\u1edbi m\u0169i ti\u1ec7n \u0111\u01b0\u1ee3c m\u00e0i s\u1eafc \u0111\u1ed9c quy\u1ec1n, N\u00f3 v\u1eabn s\u1edf h\u1eefu m\u1ed9t g\u00f3c v\u00e1t cong nh\u1ea5t \u0111\u1ecbnh. Kh\u00f4ng c\u00f3 g\u00f3c tuy\u1ec7t \u0111\u1ed1i tr\u00ean b\u1ea5t k\u1ef3 m\u0169i quay n\u00e0o.<\/p>

\"so<\/figure>
\"so<\/figure>

Qua so s\u00e1nh tr\u00ean H\u00ecnh 1 c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng b\u00e1n k\u00ednh m\u0169i dao v\u00e0 b\u01b0\u1edbc ti\u1ebfn dao tr\u00ean m\u1ed7i v\u00f2ng quay c\u00f3 \u1ea3nh h\u01b0\u1edfng l\u1edbn nh\u1ea5t \u0111\u1ebfn \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t c\u1ee7a ph\u00f4i. ph\u1ea3i \u0111\u01b0\u1ee3c ch\u1ecdn. H\u00ecnh d\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng tham chi\u1ebfu v\u1ec1 m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a ba y\u1ebfu t\u1ed1 n\u00e0y. N\u00f3i chung, b\u00e1n k\u00ednh g\u00f3c c\u1ee7a \u0111\u1ea7u dao th\u00edch h\u1ee3p v\u1edbi t\u1ed1c \u0111\u1ed9 \u0103n dao g\u1ea5p ba \u0111\u1ebfn b\u1ed1n l\u1ea7n.<\/p>

f<\/td>Ra<\/td><\/td><\/td><\/td><\/td><\/td><\/tr>
r<\/td><\/td>0.4<\/td>0.8<\/td>1.2<\/td>1.6<\/td>2.0<\/td><\/tr>
<\/td>1.6<\/td>0.07<\/td>0.1<\/td>0.12<\/td>0.14<\/td>0.16<\/td><\/tr>
<\/td>3.2<\/td>0.1<\/td>0.14<\/td>0.18<\/td>0.2<\/td>0.23<\/td><\/tr>
<\/td>6.3<\/td>0.14<\/td>0.2<\/td>0.25<\/td>0.28<\/td>0.32<\/td><\/tr>
<\/td>12.5<\/td>0.2<\/td>0.28<\/td>0.35<\/td>0.4<\/td>0.45<\/td><\/tr>
<\/td>25<\/td>0.28<\/td>0.4<\/td>0.49<\/td>0.56<\/td>0.63<\/td><\/tr><\/tbody><\/table><\/figure>

b\u00e1n k\u00ednh g\u00f3c r mm<\/p>

f ngu\u1ed3n c\u1ea5p d\u1eef li\u1ec7u t\u1ed1i \u0111a cho m\u1ed7i v\u00f2ng quay. Mm<\/p>

\u0110\u1ed9 nh\u00e1m Ra \u03bcm<\/p>

\u0110\u1ed1i v\u1edbi vi\u1ec7c l\u1ef1a ch\u1ecdn b\u00e1n k\u00ednh c\u1ee7a b\u00e1n k\u00ednh m\u0169i dao v\u00e0 b\u01b0\u1edbc ti\u1ebfn dao tr\u00ean m\u1ed7i v\u00f2ng quay, n\u00f3 c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng c\u00f4ng th\u1ee9c th\u1ef1c nghi\u1ec7m l\u00fd thuy\u1ebft (1).<\/p>

Ra = f2<\/sup>\/ r * 125<\/p>

Trong \u0111\u00f3: <\/p>

Ra (\u03bcm) – surface roughness;<\/p>

f(mm\/rev) – feed per revolution;<\/p>

r (mm) – the radius of the tool tip arc;<\/p>

125 - h\u1eb1ng s\u1ed1.<\/p>

Thay th\u1ebf gi\u00e1 tr\u1ecb \u0111\u1eb7t c\u1ee7a b\u00e1n k\u00ednh m\u0169i dao v\u00e0 l\u01b0\u1ee3ng ti\u1ebfn dao (1), ch\u00fang ta c\u0169ng c\u00f3 th\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t l\u00fd thuy\u1ebft v\u00e0 \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t.<\/p>

V\u00ed d\u1ee5: B\u00e1n k\u00ednh c\u1ee7a cung m\u0169i dao l\u00e0 0,8 mm v\u00e0 t\u1ed1c \u0111\u1ed9 ti\u1ebfn dao l\u00e0<\/p>

0,2 mm \/ r, c\u00f4ng th\u1ee9c thay th\u1ebf (1) cho \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t l\u00fd thuy\u1ebft.<\/p>

Ra = 0,22<\/sup>\/0.8*125=6.25\u03bcm<\/p>

\u0110\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t l\u00fd thuy\u1ebft l\u00e0: 6,25 \u03bcm<\/p>

\"so<\/figure>

C\u1ea7n ch\u00fa \u00fd l\u00e0 n\u1ebfu b\u00e1n k\u00ednh qu\u00e1 l\u1edbn s\u1ebd x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng rung do ti\u1ebfp x\u00fac qu\u00e1 nhi\u1ec1u gi\u1eefa dao v\u00e0 ph\u00f4i. Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu b\u00e1n k\u00ednh qu\u00e1 nh\u1ecf, \u0111\u1ea7u m\u00fat s\u1ebd tr\u1edf n\u00ean y\u1ebfu v\u00e0 nhanh b\u1ecb m\u00f2n. C\u1ea7n ph\u1ea3i m\u00e0i l\u1ea1i th\u01b0\u1eddng xuy\u00ean, do \u0111\u00f3, b\u00e1n k\u00ednh phi l\u00ea th\u01b0\u1eddng l\u00e0 0,3 ~ 0,4mm.<\/p>

B\u00e1n k\u00ednh conner (b\u00e1n k\u00ednh c\u1ea1nh)<\/p>

Khi gia c\u00f4ng m\u00e1y ti\u1ec7n CNC, c\u1ea7n ph\u1ea3i b\u00f9 b\u00e1n k\u00ednh g\u00f3c.<\/p>

Khi l\u1eadp tr\u00ecnh, \u0111\u1ea7u dao th\u01b0\u1eddng \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t \u0111i\u1ec3m, nh\u01b0ng trong th\u1ef1c t\u1ebf c\u00f3 m\u1ed9t g\u00f3c \u0111\u01b0\u1ee3c l\u00e0m tr\u00f2n. Khi b\u1ec1 m\u1eb7t, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1eb7t cu\u1ed1i, \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i, \u0111\u01b0\u1eddng k\u00ednh trong, v\u00e0 c\u00e1c b\u1ec1 m\u1eb7t t\u01b0\u01a1ng t\u1ef1, song song ho\u1eb7c vu\u00f4ng g\u00f3c v\u1edbi tr\u1ee5c, \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng ch\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1ee3c l\u1eadp tr\u00ecnh theo \u0111i\u1ec3m \u0111\u1ea7u l\u00fd thuy\u1ebft, kh\u00f4ng x\u1ea3y ra l\u1ed7i.<\/p>

Tuy nhi\u00ean, trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd th\u1ef1c t\u1ebf s\u1ebd c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng c\u1eaft qu\u00e1 nhi\u1ec1u v\u00e0 c\u1eaft nhi\u1ec1u l\u1ea7n. Ch\u00fang ta s\u1ebd th\u1ea3o lu\u1eadn v\u1ec1 hai t\u00ecnh hu\u1ed1ng sau:<\/p>

\"m\u1eb7t<\/figure>
  1. Ti\u1ec7n m\u1eb7t cu\u1ed1i v\u00e0 m\u1eb7t tr\u1ee5 trong v\u00e0 ngo\u00e0i<\/li><\/ol>

     H\u00ecnh d\u01b0\u1edbi \u0111\u00e2y cho th\u1ea5y \u0111\u1ec9nh c\u1ee7a m\u1ed9t cung tr\u00f2n v\u00e0 h\u01b0\u1edbng c\u1ee7a n\u00f3. \u0110i\u1ec3m m\u0169i dao \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u1eadp tr\u00ecnh v\u00e0 thi\u1ebft l\u1eadp dao l\u00e0 \u0111i\u1ec3m \u0111\u1ea7u dao l\u00fd t\u01b0\u1edfng. Do s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a cung m\u0169i dao, \u0111i\u1ec3m c\u1eaft th\u1ef1c t\u1ebf l\u00e0 \u0111i\u1ec3m ti\u1ebfp tuy\u1ebfn c\u1ee7a cung m\u0169i dao v\u00e0 b\u1ec1 m\u1eb7t c\u1eaft. Khi ti\u1ec7n m\u1eb7t cu\u1ed1i, \u0111i\u1ec3m c\u1eaft th\u1ef1c t\u1ebf c\u1ee7a cung m\u0169i dao gi\u1ed1ng v\u1edbi t\u1ecda \u0111\u1ed9 Z c\u1ee7a \u0111i\u1ec3m m\u0169i dao l\u00fd t\u01b0\u1edfng; khi c\u00e1c l\u1ed7 b\u00ean ngo\u00e0i v\u00e0 b\u00ean trong c\u1ee7a \u00f4 t\u00f4 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, gi\u00e1 tr\u1ecb t\u1ecda \u0111\u1ed9 X c\u1ee7a \u0111i\u1ec3m c\u1eaft th\u1ef1c t\u1ebf v\u00e0 \u0111i\u1ec3m \u0111\u1ea7u dao l\u00fd t\u01b0\u1edfng l\u00e0 nh\u01b0 nhau. Do \u0111\u00f3 kh\u00f4ng c\u1ea7n th\u1ef1c hi\u1ec7n b\u00f9 b\u00e1n k\u00ednh m\u0169i dao khi ti\u1ec7n m\u1eb7t cu\u1ed1i v\u00e0 m\u1eb7t tr\u1ee5 trong v\u00e0 m\u1eb7t tr\u1ee5 ngo\u00e0i.<\/p>

    \"m\u1eb7t<\/figure>


    2) Ti\u1ec7n b\u1ec1 m\u1eb7t c\u00f4n v\u00e0 b\u1ec1 m\u1eb7t h\u1ed3 quang khi gia c\u00f4ng b\u1ec1 m\u1eb7t c\u00f4n v\u00e0 b\u1ec1 m\u1eb7t h\u1ed3 quang<\/p>

     Khi \u0111\u01b0\u1eddng gia c\u00f4ng kh\u00f4ng song song v\u1edbi tr\u1ee5c m\u00e1y, c\u00f3 s\u1ef1 l\u1ec7ch v\u1ecb tr\u00ed gi\u1eefa \u0111i\u1ec3m c\u1eaft th\u1ef1c t\u1ebf v\u00e0 \u0111i\u1ec3m m\u0169i dao l\u00fd t\u01b0\u1edfng theo c\u00e1c ph\u01b0\u01a1ng t\u1ecda \u0111\u1ed9 X v\u00e0 Z. \u1ea2nh h\u01b0\u1edfng c\u1ee7a b\u00e1n k\u00ednh m\u0169i dao \u0111\u1ebfn \u0111\u1ed9 ch\u00ednh x\u00e1c gia c\u00f4ng \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong h\u00ecnh d\u01b0\u1edbi \u0111\u00e2y. N\u1ebfu \u0111\u01b0\u1ee3c l\u1eadp tr\u00ecnh v\u1edbi \u0111i\u1ec3m \u0111\u1ea7u dao l\u00fd t\u01b0\u1edfng, s\u1ebd \u00edt b\u1ecb c\u1eaft ho\u1eb7c c\u1eaft qu\u00e1 m\u1ee9c d\u1eabn \u0111\u1ebfn sai s\u1ed1 gia c\u00f4ng. B\u00e1n k\u00ednh cung tr\u00f2n m\u0169i dao c\u00e0ng l\u1edbn th\u00ec sai s\u1ed1 gia c\u00f4ng c\u00e0ng l\u1edbn.<\/p>

    \"c\u1eaft<\/figure>


    Trong th\u1ef1c t\u1ebf gia c\u00f4ng dao ti\u1ec7n, do qu\u00e1 tr\u00ecnh ho\u1eb7c c\u00e1c y\u00eau c\u1ea7u kh\u00e1c, m\u0169i dao th\u01b0\u1eddng kh\u00f4ng ph\u1ea3i l\u00e0 \u0111i\u1ec3m l\u00fd t\u01b0\u1edfng m\u00e0 l\u00e0 cung tr\u00f2n. Khi gia c\u00f4ng c\u00e1c \u0111\u01b0\u1eddng vi\u1ec1n m\u1eb7t tr\u1ee5 v\u00e0 m\u1eb7t cu\u1ed1i song song v\u1edbi tr\u1ee5c to\u1ea1 \u0111\u1ed9, cung m\u0169i dao kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng c\u1ee7a n\u00f3, nh\u01b0ng khi gia c\u00f4ng c\u00e1c \u0111\u01b0\u1eddng bao h\u01b0\u1edbng kh\u00f4ng to\u1ea1 \u0111\u1ed9 nh\u01b0 h\u00ecnh n\u00f3n v\u00e0 cung tr\u00f2n, \u0111i\u1ec3m c\u1eaft dao n\u1eb1m \u1edf cung \u0111\u01b0\u1eddng dao. N\u1ebfu n\u00f3 thay \u0111\u1ed5i h\u01b0\u1edbng l\u00ean tr\u00ean, v\u00f2ng cung c\u1ee7a \u0111\u1ea7u dao s\u1ebd g\u00e2y ra l\u1ed7i v\u1ec1 k\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng, d\u1eabn \u0111\u1ebfn \u00edt ho\u1eb7c nhi\u1ec1u v\u1ebft c\u1eaft. Lo\u1ea1i l\u1ed7i gia c\u00f4ng g\u00e2y ra b\u1edfi \u0111\u1ea7u dao kh\u00f4ng ph\u1ea3i l\u00e0 \u0111i\u1ec3m l\u00fd t\u01b0\u1edfng m\u00e0 l\u00e0 m\u1ed9t cung tr\u00f2n, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf b\u1eb1ng ch\u1ee9c n\u0103ng b\u00f9 b\u00e1n k\u00ednh m\u0169i dao.<\/p><\/div>","protected":false},"excerpt":{"rendered":"

    Shown as the figure below, corner radius is formed by crossed line major cutting edge and side cutting edge, which is also named as edge radius. In the cutting process, in order to improve the tool tip strength and reduce the surface roughness of the machine, a circular arc transition edge usually exists at the tool…<\/p>","protected":false},"author":2,"featured_media":19327,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[92],"tags":[],"class_list":["post-3632","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cutting-tools-weekly"],"jetpack_featured_media_url":"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/07\/1.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/3632","targetHints":{"allow":["GET"]}}],"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=3632"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/3632\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media\/19327"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=3632"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=3632"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=3632"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}