{"id":1972,"date":"2020-10-13T06:43:51","date_gmt":"2020-10-13T06:43:51","guid":{"rendered":"http:\/\/trangdoan.vn\/kythuatkimhoan\/?p=1972"},"modified":"2021-09-07T09:11:29","modified_gmt":"2021-09-07T09:11:29","slug":"dam-bao-da-cong-de-khoan-de-dang","status":"publish","type":"post","link":"https:\/\/trangdoan.vn\/kythuatkimhoan\/dam-bao-da-cong-de-khoan-de-dang\/","title":{"rendered":"\u0110\u1ea2M B\u1ea2O \u0110\u00c1 CONG \u0110\u1ec2 KHOAN D\u1ec4 D\u00c0NG"},"content":{"rendered":"

Vi\u1ebft b\u1edfi Helen I. Driggs<\/em><\/span><\/p>\n

\u0110\u1ea3m b\u1ea3o an to\u00e0n cho \u0111\u00e1 c\u00f3 bi\u1ebfn d\u1ea1ng cong khi khoan c\u00f3 th\u1ec3 s\u1ebd h\u01a1i kh\u00f3. Th\u01b0\u1eddng khoan \u0111\u1ed3 g\u1ed1m s\u1ee9 t\u00e1i ch\u1ebf, \u0111\u00e1 cu\u1ed9i tr\u00ean b\u00e3i bi\u1ec3n, th\u1ee7y tinh, t\u00f4i d\u00f9ng n\u01b0\u1edbc v\u00e0 m\u1ea3nh g\u1ed1m cho qu\u00e1 tr\u00ecnh l\u00e0m m\u00e1t trong khi th\u1ef1c hi\u1ec7n. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 t\u00f4i c\u1ea7n khoan nhi\u1ec1u l\u1ed7. Tuy nhi\u00ean c\u00e1c vi\u00ean s\u1ecfi, th\u1ee7y tinh v\u00e0 g\u1ed1m th\u01b0\u1eddng c\u00f3 bi\u1ebfn d\u1ea1ng cong. N\u00ean vi\u1ec7c gi\u1eef ch\u00fang m\u1ed9t c\u00e1ch an to\u00e0n v\u00e0 khoan m\u1ed9t l\u1ed7 th\u1eb3ng m\u00e0 kh\u00f4ng l\u00e0m n\u1ee9t ch\u00fang l\u00e0 m\u1ed9t th\u00e1ch th\u1ee9c.<\/span><\/p>\n

\u0110\u00e2y l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p nhanh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c v\u1eadt li\u1ec7u c\u1ee9ng trong qu\u00e1 tr\u00ecnh khoan d\u01b0\u1edbi n\u01b0\u1edbc. Ngo\u00e0i vi\u1ec7c gi\u00fap b\u1ea1n tr\u00e1nh l\u00e0m n\u1ee9t \u0111\u00e1, n\u00f3 c\u00f3 th\u1ec3 ng\u0103n ng\u1eeba m\u1ecfi tay, tr\u01b0\u1ee3t v\u00e0 g\u00e3y m\u0169i khoan.<\/span><\/p>\n

\u0110\u1ed1i v\u1edbi c\u00f4ng vi\u1ec7c n\u00e0y, b\u1ea1n s\u1ebd c\u1ea7n m\u1ed9t \u0111\u0129a Pyrex n\u00f4ng, s\u00e1p Dop \/ s\u00e1p n\u1ebfn \/ s\u00e1p ong, b\u1eadt l\u1eeda, m\u0169i khoan Kim c\u01b0\u01a1ng<\/a> m\u1ecbn (1 \u0111\u1ebfn 1.5 mm). Tr\u1ee5c quay tay c\u1ea7m #30, m\u0169i khoan kim c\u01b0\u01a1ng v\u1edbi c\u00e1c \u0111\u01b0\u1eddng k\u00ednh kh\u00e1c nhau, \u0111\u00e1 m\u00e0i, n\u01b0\u1edbc, k\u00ednh b\u1ea3o h\u1ed9 v\u00e0 s\u1ef1 ki\u00ean nh\u1eabn.<\/span><\/p>\n

Khoan an to\u00e0n \u0111\u00e1 c\u00f3 bi\u00ean d\u1ea1ng cong m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng<\/em><\/span><\/h3>\n\n\n\n\n\n\n\n\n\n
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\"\"\u0110\u00e2y l\u00e0 c\u00e1c m\u0169i khoan kim c\u01b0\u01a1ng 120 grit \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u nh\u1ea5t c\u1ee7a t\u00f4i \u0111\u1ec3 t\u1ea1o c\u00e1c l\u1ed7 khoan \u0111\u1ea7u ti\u00ean trong \u0111\u00e1, g\u1ed1m v\u00e0 th\u1ee7y tinh. Ch\u00fang bao g\u1ed3m t\u1eeb m\u0169i khoan 1mm, 2mm h\u00ecnh c\u00f4n, 3mm h\u00ecnh n\u00f3n. Th\u00e2n d\u00e0i v\u1edbi tr\u1ee5c c\u00f3 \u0111\u01b0\u1eddng k\u00ednh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi \u1ed1ng b\u1ed3i \u0111\u01b0\u1eddng k\u00ednh 3mm \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u nh\u1ea5t c\u1ee7a t\u00f4i. T\u00f4i c\u0169ng s\u1eed d\u1ee5ng m\u0169i b\u00fap 300 grit v\u00e0 600 grit c\u00f3 h\u00ecnh d\u1ea1ng gi\u1ed1ng nhau \u0111\u1ec3 ch\u00e0 nh\u00e1m cu\u1ed1i c\u00f9ng.<\/span><\/p>\n<\/td>\n<\/tr>\n

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\"\"\u0110\u1eb7t trong \u0111\u0129a b\u1eb1ng g\u1ed1m ho\u1eb7c th\u1ee7y tinh Pyrex, nung ch\u1ea3y s\u00e1p \u0111\u1ec3 \u0111\u1ecbnh v\u1ecb cho b\u1ea5t k\u1ef3 \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e0o b\u1ea1n \u0111\u1ecbnh khoan. H\u00e3y ch\u1eafc ch\u1eafn chi\u1ebfc \u0111\u0129a \u0111ang kh\u00f4, n\u1ebfu kh\u00f4ng s\u00e1p s\u1ebd kh\u00f4ng d\u00ednh v\u00e0o n\u00f3. T\u1ea1o g\u00f2 s\u00e1p cao s\u1ebd h\u1ed7 tr\u1ee3 cho \u0111\u1ed1i t\u01b0\u1ee3ng b\u1ea1n s\u1ebd khoan. T\u00f4i th\u01b0\u1eddng t\u1ea1o ra m\u1ed9t g\u00f2 s\u00e1p cao h\u01a1n \u0111\u1ed9 d\u00e0y c\u1ee7a v\u1eadt th\u1ec3. N\u1ebfu nghi ng\u1edd l\u1ed7i s\u1ebd ph\u00e1t sinh b\u00ean h\u00f4ng, b\u1ea1n th\u00eam s\u00e1p thay v\u00ec \u00edt h\u01a1n.<\/span><\/p>\n<\/td>\n<\/tr>\n

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\"\"Khi \u0111\u00e3 c\u00f3 m\u1ed9t l\u1edbp \u0111\u1ebf \u0111\u1ee7 d\u00e0y, h\u00e3y l\u00e0m ch\u1ea3y m\u1ed9t l\u1edbp s\u00e1p tr\u00ean c\u00f9ng v\u00e0 \u1ea5n nhanh v\u1eadt s\u1ebd khoan v\u00e0o \u0111\u00f3. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 th\u00eam s\u00e1p n\u00f3ng ch\u1ea3y l\u00ean c\u00e1c c\u1ea1nh c\u1ee7a v\u1eadt th\u1ec3. B\u1eb1ng c\u00e1ch \u0111\u1ea9y v\u00e0 \u0111i\u1ec1u ch\u1ec9nh b\u1eb1ng que hay d\u1ee5ng c\u1ee5 n\u00e0o \u0111\u00f3. V\u00e0 \u0111\u1ec3 cho s\u00e1p ngu\u1ed9i ho\u00e0n to\u00e0n.<\/span><\/p>\n<\/td>\n<\/tr>\n

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\"\"\u0110\u1ed5 n\u01b0\u1edbc v\u00e0o \u0111\u0129a ph\u1ee7 nh\u1eb9 b\u1ec1 m\u1eb7t c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng s\u1ebd khoan. B\u1ea1n ph\u1ea3i khoan trong n\u01b0\u1edbc khi s\u1eed d\u1ee5ng m\u0169i kim c\u01b0\u01a1ng. N\u1ebfu kh\u00f4ng, nhi\u1ec7t ph\u00e1t sinh qu\u00e1 n\u00f3ng c\u00f3 th\u1ec3 l\u00e0m v\u1ee1 \u0111\u00e1. N\u01b0\u1edbc l\u00e0m m\u00e1t c\u1ea3 v\u1eadt khoan v\u00e0 m\u0169i khoan. \u0110\u1eebng qu\u00ean \u0111eo k\u00ednh b\u1ea3o h\u1ed9 khi b\u1ea1n l\u00e0m vi\u1ec7c.<\/span><\/p>\n<\/td>\n<\/tr>\n

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\"\"S\u1eed d\u1ee5ng m\u0169i khoan kim c\u01b0\u01a1ng nh\u1ecf nh\u1ea5t, khoan m\u1ed9t l\u1ed7 th\u00ed \u0111i\u1ec3m xuy\u00ean su\u1ed1t v\u1eadt th\u1ec3. H\u00e3y tho\u1ea3i m\u00e1i v\u00e0 ki\u00ean nh\u1eabn, b\u1ea1n s\u1ebd h\u01a1i m\u1ea5t th\u1eddi gian. \u0110\u1eb7c bi\u1ec7t l\u00e0 tr\u00ean nh\u1eefng vi\u00ean \u0111\u00e1 c\u1ee9ng h\u01a1n, kho\u1ea3ng 6 tr\u00ean thang Mohs. T\u00f4i khoan trong v\u00e0i gi\u00e2y, lo\u1ea1i b\u1ecf b\u1ee5i khoan, l\u00e0m s\u1ea1ch l\u1ed7, v\u00e0 sau \u0111\u00f3 ti\u1ebfp t\u1ee5c khoan. T\u00f4i s\u1eed d\u1ee5ng m\u0169i khoan 1mm, r\u1ea5t nh\u1ecf \u0111\u1ec3 khoan l\u1ed7 th\u00ed \u0111i\u1ec3m. Kh\u00f4ng th\u1ec3 tr\u00e1nh kh\u1ecfi l\u1ed7 th\u1ee7ng s\u1ebd th\u1ed5i ra \u1edf ph\u00eda sau (t\u1ea1o ra l\u1ed7 tho\u00e1t, t\u00f9y thu\u1ed9c v\u00e0o m\u1ee9c \u0111\u1ed9 gi\u00f2n hay d\u1ec5 v\u1ee1 c\u1ee7a v\u1eadt li\u1ec7u). V\u00ec v\u1eady l\u1ed7 khoan s\u1ebd c\u1ea7n ph\u1ea3i \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng. B\u1ea1n s\u1ebd \u00edt ph\u1ea3i l\u00e0m s\u1ea1ch \u1edf m\u1eb7t sau khi t\u1ea1o l\u1ed7 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf.<\/span><\/p>\n<\/td>\n<\/tr>\n

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\"\"Khi l\u1ed7 khoan \u0111\u00e3 ho\u00e0n to\u00e0n th\u00f4ng, h\u00e3y l\u1ea5y v\u1eadt khoan ra kh\u1ecfi s\u00e1p. N\u1ebfu n\u00f3 b\u1ecb d\u00ednh, \u0111\u1ed5 n\u01b0\u1edbc v\u00e0 \u0111\u1ec3 h\u00f4ng kh\u00f4. \u0110\u1eb7t \u0111\u0129a v\u00e0o t\u1ee7 \u0111\u00e1 trong v\u00e0i ph\u00fat \u0111\u1ec3 l\u00e0m l\u1ea1nh v\u00e0 l\u00e0m c\u1ee9ng s\u00e1p. H\u1ea7u nh\u01b0 s\u00e1p l\u1ea1nh s\u1ebd gi\u1ea3i ph\u00f3ng \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1 s\u1ea1ch s\u1ebd. Lau s\u1ea1ch s\u00e1p b\u00e1m d\u00ednh kh\u1ecfi \u0111\u00e1 b\u1eb1ng t\u0103m b\u00f4ng t\u1ea9m acetone.<\/span><\/p>\n<\/td>\n<\/tr>\n

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\"\"Ki\u1ec3m tra l\u1ed7 khoan. N\u1ebfu kh\u00f4ng c\u00f3 v\u1ebft n\u1ee9t trong m\u1ea3nh \u0111\u00e1, ti\u1ebfp t\u1ee5c khoan m\u0169i khoan l\u1edbn h\u01a1n v\u00e0 d\u1ea7n d\u1ea7n m\u1edf r\u1ed9ng l\u1ed7. (Tuy nhi\u00ean, n\u1ebfu c\u00f3 v\u1ebft n\u1ee9t, t\u1ed1t nh\u1ea5t l\u00e0 lo\u1ea1i b\u1ecf. V\u00ec v\u1ebft n\u1ee9t s\u1ebd ch\u1ec9 l\u1edbn h\u01a1n v\u00e0 t\u1ea1o ra m\u1ed9t v\u00f9ng r\u1ea1n y\u1ebfu trong \u0111\u00e1.) T\u00f4i th\u00edch khoan lu\u00e2n phi\u00ean t\u1eeb tr\u01b0\u1edbc v\u00e0 sau m\u1ed7i khi t\u00f4i chuy\u1ec3n sang m\u0169i khoan l\u1edbn h\u01a1n. V\u00e0 ti\u1ebfp t\u1ee5c cho \u0111\u1ebfn khi ho\u00e0n thi\u1ec7n. T\u00f4i s\u1eed d\u1ee5ng m\u0169i kim c\u01b0\u01a1ng m\u1ecbn h\u01a1n \u0111\u1ec3 \u0111\u00e1nh nh\u00e1m c\u00e1c l\u1ed7 cho l\u00e1ng m\u1ecbn. Cu\u1ed1i c\u00f9ng, t\u00f4i th\u01b0\u1eddng s\u1ebd ho\u00e0n th\u00e0nh c\u00f4ng vi\u1ec7c v\u1edbi m\u0169i khoan m\u1ecbn h\u00ecnh c\u1ea7u. Ch\u00fang gi\u00fap t\u1ea1o ra \u0111\u1ed9 c\u00f4n nh\u1eb9 \u1edf c\u1ea1nh tr\u00ean v\u00e0 d\u01b0\u1edbi c\u1ee7a l\u1ed7 khoan \u0111\u1ec3 tr\u00e1nh s\u1ee9t m\u1ebb \u0111\u00e1.<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Ngu\u1ed3n: Ganoksin<\/em><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Vi\u1ebft b\u1edfi Helen I. Driggs \u0110\u1ea3m b\u1ea3o an to\u00e0n cho \u0111\u00e1 c\u00f3 bi\u1ebfn d\u1ea1ng cong khi khoan c\u00f3 th\u1ec3 s\u1ebd h\u01a1i kh\u00f3. Th\u01b0\u1eddng khoan \u0111\u1ed3 g\u1ed1m s\u1ee9 t\u00e1i ch\u1ebf, \u0111\u00e1 cu\u1ed9i tr\u00ean b\u00e3i bi\u1ec3n, th\u1ee7y tinh, t\u00f4i d\u00f9ng n\u01b0\u1edbc v\u00e0…<\/p>\n","protected":false},"author":4,"featured_media":1969,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[63,61],"tags":[],"yst_prominent_words":[],"class_list":["post-1972","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chia-se-kien-thuc","category-kien-thuc-kim-hoan"],"_links":{"self":[{"href":"https:\/\/trangdoan.vn\/kythuatkimhoan\/wp-json\/wp\/v2\/posts\/1972","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/trangdoan.vn\/kythuatkimhoan\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/trangdoan.vn\/kythuatkimhoan\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/trangdoan.vn\/kythuatkimhoan\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/trangdoan.vn\/kythuatkimhoan\/wp-json\/wp\/v2\/comments?post=1972"}],"version-history":[{"count":15,"href":"https:\/\/trangdoan.vn\/kythuatkimhoan\/wp-json\/wp\/v2\/posts\/1972\/revisions"}],"predecessor-version":[{"id":5120,"href":"https:\/\/trangdoan.vn\/kythuatkimhoan\/wp-json\/wp\/v2\/posts\/1972\/revisions\/5120"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/trangdoan.vn\/kythuatkimhoan\/wp-json\/wp\/v2\/media\/1969"}],"wp:attachment":[{"href":"https:\/\/trangdoan.vn\/kythuatkimhoan\/wp-json\/wp\/v2\/media?parent=1972"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/trangdoan.vn\/kythuatkimhoan\/wp-json\/wp\/v2\/categories?post=1972"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/trangdoan.vn\/kythuatkimhoan\/wp-json\/wp\/v2\/tags?post=1972"},{"taxonomy":"yst_prominent_words","embeddable":true,"href":"https:\/\/trangdoan.vn\/kythuatkimhoan\/wp-json\/wp\/v2\/yst_prominent_words?post=1972"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}