{"id":3537,"date":"2019-05-20T03:03:20","date_gmt":"2019-05-20T03:03:20","guid":{"rendered":"https:\/\/www.mcctcarbide.com\/?p=3537"},"modified":"2020-05-06T05:19:51","modified_gmt":"2020-05-06T05:19:51","slug":"gun-drill-compares-favorably-with-twist-drill","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/gun-drill-compares-favorably-with-twist-drill\/","title":{"rendered":"M\u0169i khoan so s\u00e1nh thu\u1eadn l\u1ee3i v\u1edbi m\u0169i khoan xo\u1eafn"},"content":{"rendered":"

M\u0169i khoan xo\u1eafn v\u00e0 m\u0169i khoan l\u1ed7 s\u00e2u lu\u00f4n l\u00e0 l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn trong ng\u00e0nh x\u1eed l\u00fd l\u1ed7 s\u00e2u. Ch\u00fang ta c\u00f3 th\u1ec3 l\u00e0m cho hai c\u00f4ng c\u1ee5 n\u00e0y x\u1eed l\u00fd th\u00e9p q235, th\u00e9p #45 v\u00e0 nh\u00f4m th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 kh\u00e1m ph\u00e1 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c l\u1ed7 gia c\u00f4ng do hai c\u00f4ng c\u1ee5 t\u1ea1o ra v\u00e0 s\u1ef1 thay \u0111\u1ed5i ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t c\u1ee7a hai c\u00f4ng c\u1ee5 d\u01b0\u1edbi \u0111\u1ed9 c\u1ee9ng kh\u00e1c nhau nguy\u00ean v\u1eadt li\u1ec7u.<\/p>

M\u00e1y khoan xo\u1eafn v\u00e0 m\u00e1y khoan s\u00fang ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o<\/h2>

Nh\u01b0 th\u1ec3 hi\u1ec7n trong h\u00ecnh 2, m\u0169i khoan xo\u1eafn th\u01b0\u1eddng \u0111\u01b0\u1ee3c chia th\u00e0nh lo\u1ea1i c\u00f3 c\u00e1n th\u1eb3ng v\u00e0 lo\u1ea1i c\u00f3 c\u00e1n c\u00f4n. Nguy\u00ean t\u1eafc l\u00e0m vi\u1ec7c c\u1ee7a n\u00f3 l\u00e0 m\u0169i khoan quay v\u1edbi t\u1ed1c \u0111\u1ed9 cao d\u01b0\u1edbi \u1ed5 tr\u1ee5c ch\u00ednh, ph\u00f4i li\u00ean t\u1ee5c \u0111\u01b0\u1ee3c \u0111\u01b0a xu\u1ed1ng d\u01b0\u1edbi v\u00e0 phoi \u0111\u01b0\u1ee3c l\u1ea5y ra kh\u1ecfi r\u00e3nh xo\u1eafn \u1ed1c \u0111\u1ec3 thu \u0111\u01b0\u1ee3c l\u1ed7 mong mu\u1ed1n. .<\/p>

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Trong qu\u00e1 tr\u00ecnh khoan s\u00fang, m\u00e1y b\u01a1m \u0111\u01b0a ch\u1ea5t l\u00e0m m\u00e1t \u00e1p su\u1ea5t cao qua l\u1ed7 b\u00ean trong c\u1ee7a \u1ed1ng khoan v\u00e0o khu v\u1ef1c c\u1eaft ph\u00eda tr\u01b0\u1edbc. Trong khi l\u00e0m m\u00e1t v\u00e0 b\u00f4i tr\u01a1n d\u1ee5ng c\u1ee5, phoi \u0111\u01b0\u1ee3c th\u1ea3i ra kh\u1ecfi ch\u1ea5t l\u1ecfng \u00e1p su\u1ea5t cao qua r\u00e3nh ch\u1eef V c\u1ee7a \u1ed1ng khoan \u0111\u1ebfn th\u00f9ng nhi\u00ean li\u1ec7u. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh v\u00e0 sau \u0111\u00f3 c\u1eaft b\u1eb1ng c\u00e1ch xoay ph\u00f4i, gi\u00fap l\u1ed7 c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao h\u01a1n.<\/p>

\"\"<\/figure>


Thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho m\u00e1y khoan xo\u1eafn n\u00f3i chung l\u00e0 m\u00e1y khoan b\u00e0n v\u00e0 m\u00e1y khoan xuy\u00ean t\u00e2m, v\u00e0 c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean m\u00e1y phay th\u00f4ng th\u01b0\u1eddng ho\u1eb7c m\u00e1y CNC. H\u1ea7u h\u1ebft c\u00e1c m\u00e1y khoan s\u00fang \u0111\u1ec1u s\u1eed d\u1ee5ng m\u00e1y gia c\u00f4ng l\u1ed7 s\u00e2u CNC, \u0111\u00f2i h\u1ecfi h\u1ec7 th\u1ed1ng c\u1ea5p v\u00e0 l\u1ecdc d\u1ea7u \u00e1p su\u1ea5t cao.<\/p>

So s\u00e1nh th\u00ed nghi\u1ec7m x\u1eed l\u00fd<\/h2>

1. T\u1ed1c \u0111\u1ed9 c\u1eaft<\/h3>

T\u1ed1c \u0111\u1ed9 c\u1eaft c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111o t\u01b0\u01a1ng \u1ee9ng b\u1eb1ng v\u1eadn t\u1ed1c tuy\u1ebfn t\u00ednh v\u00e0 v\u1eadn t\u1ed1c g\u00f3c. M\u1ed1i quan h\u1ec7 gi\u1eefa v\u1eadn t\u1ed1c g\u00f3c n (r\/min) v\u00e0 v\u1eadn t\u1ed1c th\u1eb3ng Vc (mm\/min) l\u00e0:<\/p>

Vc=nd\u03c0\/100. d l\u00e0 \u0111\u01b0\u1eddng k\u00ednh hi\u1ec7u qu\u1ea3 c\u1ee7a d\u1ee5ng c\u1ee5<\/p>

T\u1ed1c \u0111\u1ed9 c\u1eaft c\u1ee7a c\u00e1c v\u1eadt li\u1ec7u d\u1ee5ng c\u1ee5 kh\u00e1c nhau l\u00e0 kh\u00e1c nhau. H\u00ecnh 1 sau \u0111\u00e2y l\u00e0 t\u1ed1c \u0111\u1ed9 c\u1eaft c\u1ee7a m\u0169i khoan s\u00fang.<\/p>

\"\"<\/figure>

2. T\u1ed1c \u0111\u1ed9 n\u1ea1p Vf <\/h3>

Vf c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb theo chi\u1ec1u s\u00e2u th\u1eb3ng \u0111\u1ee9ng c\u1ee7a dao c\u1eaft v\u00e0o ph\u00f4i tr\u00ean ph\u00fat ho\u1eb7c theo kho\u1ea3ng c\u00e1ch dao c\u1eaft tr\u00ean m\u1ed7i v\u00f2ng quay. \u0110\u1ed1i v\u1edbi l\u01b0\u1ee3ng n\u1ea1p c\u1ee7a m\u0169i khoan s\u00fang, h\u00e3y tham kh\u1ea3o B\u1ea3ng 1. Th\u00f4ng th\u01b0\u1eddng, f=0,01~0,032mm\/r \u0111\u01b0\u1ee3c ch\u1ecdn. T\u1ed1c \u0111\u1ed9 n\u1ea1p c\u1ee7a m\u00e1y khoan s\u00fang th\u1ea5p h\u01a1n m\u00e1y khoan xo\u1eafn.<\/p>

3. \u00c1p su\u1ea5t d\u1ea7u l\u00e0m m\u00e1t<\/h3>

Vi\u1ec7c l\u1ef1a ch\u1ecdn \u00e1p su\u1ea5t d\u1ea7u P (kg\/cm2) c\u00f3 li\u00ean quan \u0111\u1ebfn qu\u00e1 tr\u00ecnh x\u1ea3 tr\u01a1n tru c\u1ee7a qu\u00e1 tr\u00ecnh l\u00e0m m\u00e1t v\u00e0 phoi, \u0111\u1ed3ng th\u1eddi c\u00f3 \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t c\u1ee7a s\u1ea3n ph\u1ea9m. M\u1ed1i quan h\u1ec7 gi\u1eefa \u00e1p su\u1ea5t c\u1eaft v\u00e0 t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y c\u1ee7a s\u00fang khoan \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong B\u1ea3ng 2.<\/p>

\"\"<\/figure>

B\u1ea3ng 3 th\u1ec3 hi\u1ec7n \u0111i\u1ec1u ki\u1ec7n th\u00ed nghi\u1ec7m khoan s\u00fang tr\u00ean th\u00e9p #45, th\u00e9p Q235 v\u00e0 m\u00e1c h\u1ee3p kim nh\u00f4m ZL101.<\/p>

\"\"<\/figure>

S\u1ed1 li\u1ec7u th\u1ef1c nghi\u1ec7m<\/h2>

Sau nhi\u1ec1u th\u00ed nghi\u1ec7m, c\u00e1c gi\u00e1 tr\u1ecb \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t c\u1ee7a \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra c\u1ee7a ba v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong B\u1ea3ng 4.<\/p>

\"\"<\/figure>

Nh\u01b0 c\u00f3 th\u1ec3 th\u1ea5y t\u1eeb b\u1ea3ng tr\u00ean, \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t c\u1ee7a l\u1ed7 gia c\u00f4ng c\u1ee7a m\u00e1y khoan s\u00fang th\u1ea5p h\u01a1n so v\u1edbi m\u00e1y khoan xo\u1eafn. C\u1ea3 m\u00e1y khoan s\u00fang v\u00e0 m\u00e1y khoan xo\u1eafn \u0111\u1ec1u c\u00f3 th\u1ec3 gia c\u00f4ng c\u00e1c l\u1ed7 c\u00f3 \u0111\u1ed9 nh\u00e1m nh\u1ecf tr\u00ean nh\u00f4m. \u0110i\u1ec1u \u0111\u00e1ng ch\u00fa \u00fd l\u00e0 c\u00e1c con chip \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1edfi nh\u00f4m khoan xo\u1eafn v\u00e0 th\u00e9p Q235 c\u00f3 d\u1ea1ng xo\u1eafn \u1ed1c. M\u00e1y khoan s\u00fang l\u00e0 m\u1ed9t m\u00e1y c\u1eaft c\u00f3 c\u1ea1nh th\u1eb3ng kh\u00f4ng c\u00f3 r\u00e3nh xo\u1eafn \u1ed1c, v\u00ec v\u1eady phoi m\u00e0 n\u00f3 t\u1ea1o ra h\u1ea7u h\u1ebft \u1edf d\u1ea1ng t\u1ea5m. B\u1eb1ng c\u00e1ch n\u00e0y, phoi ng\u1eafn, vi\u1ec7c lo\u1ea1i b\u1ecf phoi d\u1ec5 d\u00e0ng, thanh dao kh\u00f4ng b\u1ecb qu\u1ea5n v\u00e0 th\u00e0nh l\u1ed7 c\u1ee7a b\u1ed9 ph\u1eadn kh\u00f4ng b\u1ecb tr\u1ea7y x\u01b0\u1edbc. Ngo\u00e0i ra, nh\u01b0 c\u00f3 th\u1ec3 th\u1ea5y t\u1eeb b\u1ea3ng tr\u00ean, khi x\u1eed l\u00fd ba v\u1eadt li\u1ec7u n\u00e0y, \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t c\u1ee7a l\u1ed7 khoan s\u00fang g\u1ea7n v\u00e0 \u0111\u1ed9 nh\u00e1m c\u1ee7a l\u1ed7 \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng m\u00e1y khoan xo\u1eafn t\u01b0\u01a1ng \u0111\u1ed1i xa. Ch\u1ec9 khi gia c\u00f4ng kim lo\u1ea1i m\u00e0u, hi\u1ec7u qu\u1ea3 x\u1eed l\u00fd c\u1ee7a m\u0169i khoan xo\u1eafn m\u1edbi g\u1ea7n v\u1edbi m\u0169i khoan s\u00fang v\u00e0 t\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a kim lo\u1ea1i m\u00e0u t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p. T\u00f3m l\u1ea1i, ch\u1ea5t l\u01b0\u1ee3ng x\u1eed l\u00fd c\u1ee7a m\u00e1y khoan s\u00fang ph\u1ea3i v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi m\u00e1y khoan xo\u1eafn.<\/p>

\"\"<\/figure>

V\u1eady t\u1ea1i sao \u0111i\u1ec1u n\u00e0y x\u1ea3y ra? C\u00f3 2 l\u00fd do<\/strong> d\u01b0\u1edbi:<\/p>

1. M\u0169i khoan xo\u1eafn t\u1ea1o ra m\u00f4-men xo\u1eafn t\u01b0\u01a1ng \u0111\u1ed1i l\u1edbn trong qu\u00e1 tr\u00ecnh gia c\u00f4ng. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 khi\u1ebfn tr\u1ee5c b\u1ecb l\u1ec7ch g\u00e2y kh\u00f3 kh\u0103n cho vi\u1ec7c \u0111\u1ecbnh t\u00e2m. T\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, \u0111\u1ed9 xo\u1eafn c\u1ee7a m\u0169i khoan xo\u1eafn c\u00f3 th\u1ec3 g\u00e2y ra c\u00e1c g\u1edd. M\u00e1y khoan s\u00fang c\u00f3 m\u1ed9t h\u01b0\u1edbng d\u1eabn \u1ed1ng khoan \u0111\u1ec3 \u0111\u1ecbnh v\u1ecb ch\u00ednh x\u00e1c. Do \u0111\u00f3, c\u00e1c l\u1ed7 \u0111\u01b0\u1ee3c x\u1eed l\u00fd v\u1ec1 c\u01a1 b\u1ea3n kh\u00f4ng c\u00f3 g\u1edd.<\/p>

2. L\u01b0\u1ee1i c\u1eaft c\u1ee7a m\u0169i khoan xo\u1eafn d\u00e0i h\u01a1n v\u00e0 r\u00e3nh xo\u1eafn \u1ed1c c\u0169ng s\u1ebd l\u00e0m t\u0103ng \u0111\u1ed9 kh\u00f3 lo\u1ea1i b\u1ecf phoi. Ma s\u00e1t phoi xo\u1eafn \u1ed1c l\u00e0m tr\u1ea7y x\u01b0\u1edbc th\u00e0nh l\u1ed7, \u0111\u00e2y c\u0169ng l\u00e0 nguy\u00ean nh\u00e2n l\u00e0m t\u0103ng \u0111\u1ed9 nh\u00e1m. M\u00e1y khoan s\u00fang s\u1eed d\u1ee5ng s\u01a1 t\u00e1n phoi th\u1ee7y l\u1ef1c \u0111\u1ec3 b\u00f4i tr\u01a1n v\u00e0 lo\u1ea1i b\u1ecf nhi\u1ec7t c\u1eaft. B\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t c\u1ee7a d\u1ee5ng c\u1ee5 v\u00e0 ph\u00f4i.<\/p><\/div>","protected":false},"excerpt":{"rendered":"

Twist drills and deep hole gun drills have always been a common choice in the deep hole processing industry. We can make these two tools process the commonly used q235 steel, #45 steel and aluminum, to explore the difference of the surface quality of the machining holes produced by the two tools, and the variation…<\/p>","protected":false},"author":2,"featured_media":19342,"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-3537","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\/05\/1-1.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/3537","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=3537"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/3537\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media\/19342"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=3537"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=3537"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=3537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}