{"id":4064,"date":"2020-04-11T06:28:45","date_gmt":"2020-04-11T06:28:45","guid":{"rendered":"https:\/\/www.mcctcarbide.com\/?p=4064"},"modified":"2020-05-06T01:04:53","modified_gmt":"2020-05-06T01:04:53","slug":"do-you-really-know-how-to-use-micrometer","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/do-you-really-know-how-to-use-micrometer\/","title":{"rendered":"B\u1ea1n c\u00f3 th\u1ef1c s\u1ef1 bi\u1ebft c\u00e1ch s\u1eed d\u1ee5ng micromet?"},"content":{"rendered":"

L\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c, micromet (c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 micromet v\u00edt) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong gia c\u00f4ng ch\u00ednh x\u00e1c. N\u00f3 \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn b\u1edfi nh\u1eefng ng\u01b0\u1eddi trong ng\u00e0nh. Tuy nhi\u00ean, gi\u00e1 tr\u1ecb \u0111o kh\u00f4ng ph\u1ea3i l\u00e0 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i. Ch\u1ec9 khi c\u00f4ng c\u1ee5 \u0111o l\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c, n\u00f3 m\u1edbi c\u00f3 th\u1ec3 ti\u1ebfp c\u1eadn gi\u00e1 tr\u1ecb ch\u00ednh x\u00e1c c\u1ee7a n\u00f3 v\u00f4 h\u1ea1n.<\/p>

B\u01b0\u1edbc \u0111\u1ea7u ti\u00ean trong vi\u1ec7c s\u1eed d\u1ee5ng micromet ch\u00ednh x\u00e1c:<\/p>

Micromet c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh lo\u1ea1i m\u00e0n h\u00ecnh k\u1ef9 thu\u1eadt s\u1ed1, lo\u1ea1i c\u01a1 h\u1ecdc (m\u00e0n h\u00ecnh kh\u00f4ng k\u1ef9 thu\u1eadt s\u1ed1), lo\u1ea1i ch\u1ed1ng th\u1ea5m n\u01b0\u1edbc v\u00e0 d\u1ea7u, lo\u1ea1i chung, lo\u1ea1i \u0111\u1eb7c bi\u1ec7t, quy m\u00f4 l\u1edbn, lo\u1ea1i \u0111o nhanh, lo\u1ea1i ch\u00ednh x\u00e1c c\u1ef1c cao, vv tr\u01b0\u1edbc khi s\u1eed d\u1ee5ng, \u0111\u00f3 l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 x\u00e1c nh\u1eadn c\u1ea9n th\u1eadn lo\u1ea1i, ph\u1ea1m vi \u0111o, \u0111\u1ed9 ch\u00ednh x\u00e1c ho\u1eb7c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt kh\u00e1c.<\/p>

\u0110\u1ecdc \u0111\u00fang thang \u0111o<\/h2>

Trong vi\u1ec7c s\u1eed d\u1ee5ng micromet c\u01a1 h\u1ecdc (lo\u1ea1i m\u00e0n h\u00ecnh kh\u00f4ng k\u1ef9 thu\u1eadt s\u1ed1), th\u01b0\u1eddng c\u00f3 l\u1ed7i \u0111\u1ecdc, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a ph\u00e9p \u0111o. \u0110i\u1ec1u r\u1ea5t quan tr\u1ecdng l\u00e0 l\u00e0m ch\u1ee7 ch\u1ebf \u0111\u1ed9 \u0111\u1ecdc t\u1ef7 l\u1ec7 v\u00e0 c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a vi\u1ec7c \u0111\u1ecdc.<\/p>

\"\"<\/figure>

Khi \u0111\u1ecdc t\u00e2m ng\u1eafm c\u1ee7a h\u00ecnh tr\u1ee5 vi sai, t\u01b0 th\u1ebf \u0111\u00fang l\u00e0 nh\u00ecn tr\u1ef1c ti\u1ebfp v\u00e0o \u0111\u01b0\u1eddng tham chi\u1ebfu. Nh\u01b0 th\u1ec3 hi\u1ec7n trong v\u00ed d\u1ee5 sau:<\/strong><\/p>

\u0110\u1ecdc thang \u0111o c\u1ee7a micromet ti\u00eau chu\u1ea9n<\/h2>
\"\"<\/figure>

Chu\u1ea9n micromet:<\/p>

\"\"<\/figure>

N\u00f3i chung, gi\u00e1 tr\u1ecb ph\u00e2n chia 0,01mm c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ecdc nh\u01b0 th\u1ec3 hi\u1ec7n trong h\u00ecnh tr\u00ean ho\u1eb7c 0,001mm c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ecdc nh\u01b0 th\u1ec3 hi\u1ec7n trong h\u00ecnh b\u00ean d\u01b0\u1edbi.<\/strong><\/p>

\u0110\u1ecdc t\u1ef7 l\u1ec7 v\u1edbi micromet vernier<\/h2>

V\u1edbi con tr\u1ecf (gi\u00e1 tr\u1ecb ch\u1ec9 s\u1ed1 0,001mm):<\/p>

\"\"<\/figure>

Micromet v\u1edbi vernier \u0111\u1ec1 c\u1eadp \u0111\u1ebfn thang \u0111o vernier tr\u00ean \u0111\u01b0\u1eddng c\u01a1 s\u1edf c\u1ee7a v\u1ecf.<\/strong><\/p>

L\u01b0u \u00fd: khi ng\u01b0\u1eddi l\u00e3nh \u0111\u1ea1o \u1edf gi\u1eefa hai thang \u0111o (nh\u01b0 \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb \u1edf c\u00e1c v\u1ecb tr\u00ed \u2461, 21 v\u00e0 22), n\u00f3 \u0111\u01b0\u1ee3c \u0111\u1ecdc l\u00e0 0,21mm.<\/p>

Khi thang \u0111o \u0111\u1ed9t qu\u1ef5 \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh v\u1edbi m\u1ed9t trong c\u00e1c thang \u0111o vi m\u00f4 (nh\u01b0 trong h\u00ecnh. V\u1ecb tr\u00ed \u2462), s\u1ed1 \u0111\u1ecdc l\u00e0 0,003 mm.<\/p>

\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9<\/strong><\/strong><\/h2>

Tr\u01b0\u1edbc khi \u0111o, \u0111\u1ec3 tr\u00e1nh \u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9, micromet v\u00e0 ph\u00f4i c\u1ea7n \u0111o ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng trong m\u1ed9t th\u1eddi gian \u0111\u1ee7 d\u00e0i \u0111\u1ec3 c\u00e2n b\u1eb1ng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a n\u00f3.<\/p>

Tuy nhi\u00ean, trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng micromet, \u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 tay \u0111\u1ebfn micromet th\u01b0\u1eddng b\u1ecb b\u1ecf qua.<\/p>

\"\"<\/figure>

Khi \u0111o b\u1eb1ng micromet, nhi\u1ec7t c\u1ee7a tay s\u1ebd \u0111\u01b0\u1ee3c truy\u1ec1n \u0111\u1ebfn d\u1ee5ng c\u1ee5 \u0111o khi tay c\u1ea7m khung micromet, d\u1eabn \u0111\u1ebfn l\u1ed7i \u0111o r\u00f5 r\u00e0ng (nh\u01b0 th\u1ec3 hi\u1ec7n trong c\u00e1c k\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m sau).<\/strong><\/p>

Nh\u01b0 th\u1ec3 hi\u1ec7n trong h\u00ecnh tr\u00ean, gi\u00e1 tr\u1ecb gi\u00e3n n\u1edf nhi\u1ec7t c\u1ee7a micromet t\u0103ng theo th\u1eddi gian gi\u1eef.<\/p>

Nh\u01b0 v\u1eady<\/p>

\u2460 N\u1ebfu micromet ph\u1ea3i \u0111\u01b0\u1ee3c gi\u1eef trong khi \u0111o, th\u1eddi gian ti\u1ebfp x\u00fac ph\u1ea3i \u0111\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u.<\/p>

\u0110\u1ec3 gi\u1ea3m c\u00e1c hi\u1ec7u \u1ee9ng nhi\u1ec7t \u0111\u1ed9 tr\u00ean, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 ch\u1ecdn c\u00e0i \u0111\u1eb7t m\u1ed9t ch\u1ea5t c\u00e1ch nhi\u1ec7t ho\u1eb7c \u0111eo m\u1ed9t \u0111\u00f4i g\u0103ng tay.<\/p>

Stand C\u00f3 th\u1ec3 ch\u1ecdn gi\u00e1 \u0111\u1ee1 micromet \u0111\u1eb7c bi\u1ec7t.<\/p>

\u1ea2nh h\u01b0\u1edfng c\u1ee7a n\u1ec1n t\u1ea3ng h\u1ed7 tr\u1ee3<\/p>

Khi s\u1eed d\u1ee5ng b\u0103ng gh\u1ebf, s\u1ef1 l\u1ef1a ch\u1ecdn v\u1ecb tr\u00ed \u0111i\u1ec3m t\u1ef1a v\u00e0 t\u01b0 th\u1ebf c\u1ee7a micromet c\u00f3 t\u00e1c \u0111\u1ed9ng kh\u00e1c nhau \u0111\u1ebfn k\u1ebft qu\u1ea3 \u0111o. Nh\u01b0 th\u1ec3 hi\u1ec7n trong bi\u1ec3u \u0111\u1ed3 d\u01b0\u1edbi \u0111\u00e2y. Do \u0111\u00f3, sau khi x\u00e1c \u0111\u1ecbnh t\u01b0 th\u1ebf \u0111o, c\u1ea7n ph\u1ea3i c\u0103n ch\u1ec9nh \u0111i\u1ec3m g\u1ed1c \u0111\u1ec3 s\u1eed d\u1ee5ng l\u1ea1i.<\/p>

C\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba chung kh\u00e1c<\/strong><\/strong><\/h2>

\u0110i\u1ec3m b\u1eaft \u0111\u1ea7u (kh\u00f4ng) n\u00ean \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh tr\u01b0\u1edbc khi \u0111o v\u00e0 n\u00ean s\u1eed d\u1ee5ng v\u1ecb tr\u00ed 0 tr\u01b0\u1edbc khi s\u1eed d\u1ee5ng gi\u1ea5y kh\u00f4ng b\u1ecb m\u1edd \u0111\u1ec3 lau b\u1ec1 m\u1eb7t \u0111o c\u1ee7a \u0111e v\u00e0 v\u00edt si\u00eau nh\u1ecf.<\/p>

\"\"<\/figure>

L\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a b\u1ea3o tr\u00ec h\u00e0ng ng\u00e0y, lau s\u1ea1ch m\u1ecdi b\u1ee5i b\u1ea9n, m\u1ea3nh v\u1ee5n v\u00e0 c\u00e1c m\u1ea3nh v\u1ee5n kh\u00e1c xung quanh m\u00f4i tr\u01b0\u1eddng v\u00e0 tr\u00ean b\u1ec1 m\u1eb7t \u0111o. Ngo\u00e0i ra, c\u1ea9n th\u1eadn lau s\u1ea1ch m\u1ecdi v\u1ebft b\u1ea9n v\u00e0 d\u1ea5u v\u00e2n tay b\u1eb1ng v\u1ea3i kh\u00f4.<\/p>

S\u1eed d\u1ee5ng thi\u1ebft b\u1ecb \u0111o l\u1ef1c ch\u00ednh x\u00e1c, \u0111\u1ec3 \u0111o d\u01b0\u1edbi l\u1ef1c ch\u00ednh x\u00e1c. L\u01b0u \u00fd: khi b\u1ec1 m\u1eb7t \u0111o ti\u1ebfp x\u00fac v\u1edbi ph\u00f4i v\u00e0 ph\u00e9p \u0111o ti\u1ebfp theo, ph\u1ea3i s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb \u0111o l\u1ef1c \u0111\u1ec3 tr\u00e1nh ph\u00f4i b\u1ecb t\u00e1c \u0111\u1ed9ng nhanh.                             <\/p>

Khi micromet \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t tr\u00ean gi\u00e1 \u0111\u1ee1 micromet, ch\u00e2n \u0111\u1ebf ph\u1ea3i \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh v\u00e0 k\u1eb9p \u1edf gi\u1eefa khung micromet. Nh\u01b0ng \u0111\u1eebng k\u1eb9p qu\u00e1 ch\u1eb7t.<\/p>

\"\"<\/figure>

C\u1ea9n th\u1eadn r\u1eb1ng micromet kh\u00f4ng r\u01a1i ho\u1eb7c va ch\u1ea1m v\u1edbi b\u1ea5t c\u1ee9 th\u1ee9 g\u00ec. Kh\u00f4ng s\u1eed d\u1ee5ng l\u1ef1c qu\u00e1 m\u1ea1nh \u0111\u1ec3 xoay v\u00edt micro micromet. N\u1ebfu c\u1ea3m th\u1ea5y r\u1eb1ng micromet c\u00f3 th\u1ec3 \u0111\u00e3 b\u1ecb h\u1ecfng do ho\u1ea1t \u0111\u1ed9ng sai do tai n\u1ea1n, \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a n\u00f3 c\u1ea7n ph\u1ea3i \u0111\u01b0\u1ee3c ki\u1ec3m tra th\u00eam tr\u01b0\u1edbc khi s\u1eed d\u1ee5ng.<\/p>

Sau m\u1ed9t th\u1eddi gian d\u00e0i b\u1ea3o qu\u1ea3n ho\u1eb7c m\u00e0ng d\u1ea7u b\u1ea3o v\u1ec7, h\u00e3y lau nh\u1eb9 micromet b\u1eb1ng m\u1ed9t mi\u1ebfng v\u1ea3i ng\u00e2m trong d\u1ea7u ch\u1ed1ng \u0103n m\u00f2n.<\/p>

Th\u1eadn tr\u1ecdng khi l\u01b0u tr\u1eef<\/p>

Tr\u00e1nh \u00e1nh n\u1eafng tr\u1ef1c ti\u1ebfp trong qu\u00e1 tr\u00ecnh b\u1ea3o qu\u1ea3n.<\/p>

L\u01b0u tr\u1eef \u1edf n\u01a1i c\u00f3 th\u00f4ng gi\u00f3 t\u1ed1t v\u00e0 \u0111\u1ed9 \u1ea9m th\u1ea5p.<\/p>

L\u01b0u tr\u1eef \u1edf m\u1ed9t n\u01a1i kh\u00f4ng c\u00f3 b\u1ee5i.<\/p>

N\u1ebfu n\u00f3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong m\u1ed9t h\u1ed9p ho\u1eb7c th\u00f9ng ch\u1ee9a kh\u00e1c, h\u1ed9p ho\u1eb7c th\u00f9ng ch\u1ee9a kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1eb7t tr\u00ean m\u1eb7t \u0111\u1ea5t.<\/p>

Trong qu\u00e1 tr\u00ecnh b\u1ea3o qu\u1ea3n, n\u00ean c\u00f3 kho\u1ea3ng c\u00e1ch t\u1eeb 0,1mm \u0111\u1ebfn 1mm gi\u1eefa c\u00e1c b\u1ec1 m\u1eb7t \u0111o.<\/p>

Kh\u00f4ng l\u01b0u tr\u1eef micromet \u1edf tr\u1ea1ng th\u00e1i k\u1eb9p.<\/p>

<\/p><\/div>","protected":false},"excerpt":{"rendered":"

As a precision measuring tool, micrometer (also known as screw micrometer) is widely used in precision machining. It is well known by people in the industry. However, the measured value is not an absolute value. Only when the measuring tool is used correctly can it approach its accurate value infinitely. The first step in using…<\/p>","protected":false},"author":2,"featured_media":18999,"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-4064","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\/2020\/04\/\u56fe\u724711.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/4064","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=4064"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/4064\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media\/18999"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=4064"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=4064"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=4064"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}