{"id":3748,"date":"2019-08-30T01:48:43","date_gmt":"2019-08-30T01:48:43","guid":{"rendered":"https:\/\/www.mcctcarbide.com\/?p=3748"},"modified":"2020-05-06T03:14:50","modified_gmt":"2020-05-06T03:14:50","slug":"development-and-application-of-deep-hole-drill-with-internal-chip-removal","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/phat-trien-va-ung-dung-cua-lo-sau-khoan-voi-loai-bo-chip-ben-trong\/","title":{"rendered":"Ph\u00e1t tri\u1ec3n v\u00e0 \u1ee9ng d\u1ee5ng khoan l\u1ed7 s\u00e2u v\u1edbi lo\u1ea1i b\u1ecf chip b\u00ean trong"},"content":{"rendered":"

M\u00e1y khoan l\u1ed7 s\u00e2u th\u01b0\u1eddng \u0111\u01b0\u1ee3c chia th\u00e0nh lo\u1ea1i b\u1ecf phoi b\u00ean ngo\u00e0i (c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u0169i khoan s\u00fang), lo\u1ea1i b\u1ecf phoi b\u00ean trong (th\u01b0\u1eddng \u0111\u01b0\u1ee3c Hi\u1ec7p h\u1ed9i Qu\u1ed1c t\u1ebf v\u1ec1 Khoan l\u1ed7 s\u00e2u vi\u1ebft t\u1eaft l\u00e0 BTA), lo\u1ea1i b\u1ecf phoi l\u1ed3ng ho\u1eb7c phun. B\u00e0i b\u00e1o n\u00e0y ch\u1ee7 y\u1ebfu gi\u1edbi thi\u1ec7u s\u1ef1 ph\u00e1t tri\u1ec3n v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a nguy\u00ean l\u00fd khoan l\u1ed7 s\u00e2u c\u00f3 th\u00e1o phoi b\u00ean trong.<\/p>

N\u00f3i chung, lo\u1ea1i b\u1ecf phoi b\u00ean trong t\u1ed1t h\u01a1n so v\u1edbi lo\u1ea1i b\u1ecf phoi b\u00ean ngo\u00e0i v\u00ec phoi \u0111\u01b0\u1ee3c th\u1ea3i ra kh\u1ecfi \u1ed1ng khoan v\u00e0 kh\u00f4ng c\u1ea1o v\u1edbi b\u1ec1 m\u1eb7t \u0111\u00e3 gia c\u00f4ng n\u00ean ch\u1ea5t l\u01b0\u1ee3ng gia c\u00f4ng b\u1ec1 m\u1eb7t cao h\u01a1n. D\u1ea3i kh\u1ea9u \u0111\u1ed9 x\u1eed l\u00fd ng\u00e0y c\u00e0ng r\u1ed9ng h\u01a1n. GermanyWe l\u00e0 m\u1ed9t c\u00f4ng ty s\u1ea3n xu\u1ea5t v\u00e0 nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n l\u1ed7 s\u00e2u n\u1ed5i ti\u1ebfng. H\u1ecd ch\u1ec9 ra r\u1eb1ng ph\u1ea1m vi kh\u1ea9u \u0111\u1ed9 x\u1eed l\u00fd c\u1ee7a m\u00e1y khoan s\u00fang lo\u1ea1i b\u1ecf phoi b\u00ean ngo\u00e0i l\u00e0 0,5-113 v\u00e0 ph\u1ea1m vi \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a m\u0169i khoan l\u1ed7 \u0111\u1eb7c BTA lo\u1ea1i b\u1ecf phoi b\u00ean trong l\u00e0 7,76-350 ho\u1eb7c l\u00ean \u0111\u1ebfn 700. M\u0169i khoan doa c\u1ee7a BTA c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng l\u1ed7 khoan, l\u1ed7 \u0111\u00fac, l\u1ed7 c\u00e1n v\u00e0 c\u00e1c l\u1ed7 x\u1eed l\u00fd tr\u01b0\u1edbc kh\u00e1c, \u0111\u1ed3ng th\u1eddi c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t c\u0169ng nh\u01b0 t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd. M\u1ee9c \u0111\u1ed9 v\u00e0 ngu\u1ed3n c\u1ea5p d\u1eef li\u1ec7u c\u00f3 th\u1ec3 cao h\u01a1n so v\u1edbi khoan.Ch\u00fang t\u00f4i c\u0169ng bao g\u1ed3m m\u00e1y khoan l\u1ed7 s\u00e2u v\u00e0 m\u00e1y c\u1eaft g\u1ecdt v\u00e0 doa (phoi \u1edf h\u00e0ng tr\u01b0\u1edbc v\u00e0 h\u00e0ng sau) v\u1edbi phoi v\u00e0 v\u1eadt li\u1ec7u th\u1ea3i ra t\u1eeb \u0111\u01b0\u1eddng \u1ed1ng.<\/p>

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C\u00e1c lo\u1ea1i d\u1ee5ng c\u1ee5 c\u1eaft l\u1ed7 BTA \u0111\u1ec1u c\u00f3 c\u1ea5u t\u1ea1o g\u1ed3m \u0111\u1ea7u c\u1eaft v\u00e0 \u1ed1ng khoan r\u1ed7ng d\u00e0i. Ph\u1ea7n t\u1ed1t nh\u1ea5t trong s\u1ed1 ch\u00fang \u0111\u01b0\u1ee3c h\u00e0n v\u00e0 ph\u1ea7n d\u00e0y h\u01a1n \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i b\u1eb1ng c\u00e1c s\u1ee3i h\u00ecnh ch\u1eef nh\u1eadt b\u00ean trong v\u00e0 b\u00ean ngo\u00e0i. Ph\u1ea7n cu\u1ed1i c\u1ee7a \u1ed1ng khoan \u0111\u01b0\u1ee3c d\u1eabn \u0111\u1ed9ng b\u1edfi b\u1ed9 truy\u1ec1n \u0111\u1ed9ng k\u1eb9p \u1edf cu\u1ed1i c\u1ee7a m\u00e1y c\u00f4ng c\u1ee5 v\u00e0 ph\u00f4i \u0111\u01b0\u1ee3c d\u1eabn \u0111\u1ed9ng b\u1edfi b\u1ed9 truy\u1ec1n \u0111\u1ed9ng k\u1eb9p \u1edf ph\u00eda tr\u01b0\u1edbc tr\u1ee5c quay c\u1ee7a m\u00e1y c\u00f4ng c\u1ee5. \u1ed0ng khoan BTA l\u00e0 \u1ed1ng khoan h\u00ecnh tr\u1ee5 v\u00e0 kh\u00f4ng \u0111\u1ed1i x\u1ee9ng v\u1edbi \u0111\u1ed9 c\u1ee9ng xo\u1eafn cao h\u01a1n nhi\u1ec1u so v\u1edbi \u1ed1ng khoan s\u00fang, v\u00ec v\u1eady n\u00f3 c\u00f3 th\u1ec3 th\u00edch \u1ee9ng v\u1edbi vi\u1ec7c gia c\u00f4ng l\u1ed7 s\u00e2u c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn ph\u1ee9c t\u1ea1p. Nguy\u00ean t\u1eafc x\u1eed l\u00fd c\u1ee7a khoan l\u1ed7 s\u00e2u BTA \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y trong H\u00ecnh 1.<\/p>

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H\u00ecnh 1 Nguy\u00ean t\u1eafc khoan l\u1ed7 s\u00e2u v\u1edbi lo\u1ea1i b\u1ecf phoi<\/p>

From Fig. 1 and Fig. 2, it can be seen that the high-pressure coolant passes through the hydraulic head base supported by the central bracket and the drill sleeve on it and enters the head of the BTA bit through the holes distributed in the drill sleeve. The chips cut by the cutting edge of the head are forced into the drill pipe and discharged backwards to prevent the leakage of the high-pressure coolant lubricant. The indenter base is closely encapsulated with the workpiece and the rear part. Before entering the workpiece, the BTA bit should enter the drill pipe first so that it can get correct orientation and centering. Drilling sleeve has a high accuracy requirement. Generally speaking, it is required to reach F7 level. When drilling quality is high, it should reach G6 level. BTA bit is very long. In order to prevent vibration and deflection of drill pipe, the machine tool uses a number of special damping supports with vibration reduction function. Deep hole processing can be either tool rotation or workpiece rotation, or both rotate in opposite direction. Linear feeding is accomplished by the cutter, depending on whether the drill pipe rotates or not, the structure of drill sleeve and damping support of hydraulic bit base. It’s different. The coaxiality of each support is required to hold the drill pipe precisely and consistently, and the back end of the drill pipe is clamped by a special clamping device on the machine tool. The diameter below? 56 can be clamped by cylinder, and the larger clamp with slotted jacket. With this method, the hole depth can reach 250 *D. This machine tool can also be equipped with drills, broaching and boring tools and deep hole drills with flat or spherical bottom of the hole can be machined. The machining accuracy of BTA deep hole processing tool hole ofWe can reach IT6-9 level. The deviation of center line after processing is related to the machine tool, tool, process method and related cutting parameters. In the process method, generally only the workpiece rotates best, and the workpiece rotates opposite to the drill bit. Secondly, the bit rotation is poor. Compared with BTA solid deep hole drill, the tool used in hole processing is the worst, reaming drill, and broaching boring tool is the best.<\/p>

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H\u00ecnh 2 M\u00e1y khoan l\u1ed7 s\u00e2u<\/p>

Botek’s BTA bits and reaming drills are of many types, and the number of blades with smaller diameters is less, so only one can be used. The tip of the blade is staggered from the axis, and the guide bar has two pieces. The number of blades and the number of derivatives should gradually increase with the increase of diameter. The layout of the wrong teeth of the blade can vary from one blade to six blades, and the number of derivatives can also increase from two to six blades. The advantages of using guide are as follows: shortening the overhang length and increasing the rigidity of the blade, keeping short overhang and high rigidity at the cutting head when drilling and enlarging deep holes, which can ensure the stability and high accuracy of deep holes. Rigidity improvement restrains vibration, so it is possible to use sharper cutters. Improve the quality and efficiency of processing, adjust the tool outside the production line, adjust accurately and save time. Figure 2 also shows that the guide bars only support the head of the deep hole drill, while the longer part of the drill pipe is supported by damping. If the length L of the unsupported drill pipe is too long, the drill pipe may flutter due to flexion and centrifugal force.We has the recommended value according to the different diameter of drill pipe, and the number of damper supports should be set according to the recommended value.<\/p>

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\n\nH\u00ecnh 3 M\u1ed9t s\u1ed1 m\u0169i khoan l\u1ed7 s\u00e2u BTA\n\n<\/p>

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H\u00ecnh 4 M\u1ed9t s\u1ed1 lo\u1ea1i bit doa BTA<\/p>

C\u00e1c v\u00ed d\u1ee5 v\u1ec1 m\u0169i khoan l\u1ed7 s\u00e2u BTA v\u00e0 m\u0169i khoan doa \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y trong qu\u1ea3 sung. 3 v\u00e0 4 t\u01b0\u01a1ng \u1ee9ng. C\u00e1c ch\u00e8n c\u00f3 th\u1ec3 l\u1eadp ch\u1ec9 m\u1ee5c \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c v\u1eadt li\u1ec7u kh\u00e1c nhau c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng c\u00e1c v\u1eadt li\u1ec7u kh\u00e1c nhau. Sau khi m\u00f2n v\u00e0 r\u00e1ch, c\u00e1c thanh ch\u00e8n v\u00e0 thanh d\u1eabn h\u01b0\u1edbng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh v\u00e0 thay th\u1ebf. Ph\u1ea1m vi \u0111i\u1ec1u ch\u1ec9nh thay \u0111\u1ed5i t\u00f9y theo \u0111\u01b0\u1eddng k\u00ednh v\u00e0 c\u1ea5u tr\u00fac kh\u00e1c nhau v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c thay th\u1ebf c\u00f3 th\u1ec3 \u0111\u1ea1t (+0.01). Ngo\u1ea1i tr\u1eeb nh\u1eefng \u0111i\u1ec1u tr\u00ean, c\u00e1c v\u00ed d\u1ee5 v\u1ec1 m\u00e1y c\u1eaft v\u00e0 m\u00e1y c\u1eaft doa \u0111\u01b0\u1eddng k\u00ednh l\u1edbn (20-222,99) v\u00e0 m\u00e1y khoan \u1ed1ng (55-412,99) \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb trong qu\u1ea3 sung. 5 v\u00e0 6. Vi\u1ec7c khoan v\u00e0 m\u1edf r\u1ed9ng l\u1ed7 s\u00e2u \u0111\u01b0\u1ee3c truy\u1ec1n \u0111\u1ed9ng v\u1ec1 ph\u00eda tr\u01b0\u1edbc b\u1edfi m\u00e1y c\u1eaft, trong khi doa l\u1ed7 s\u00e2u l\u00e0 chuy\u1ec3n \u0111\u1ed9ng quay c\u1ee7a ph\u00f4i, m\u00e1y c\u1eaft \u0111\u01b0\u1ee3c k\u00e9o v\u1ec1 ph\u00eda tr\u01b0\u1edbc v\u00e0 g\u1eedi v\u1ec1 ph\u00eda tr\u01b0\u1edbc, l\u1ed7 \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y t\u1ea1o ra \u0111\u1ed9 ch\u00ednh x\u00e1c l\u1ed7 cao nh\u1ea5t, l\u00ean t\u1edbi IT7 \u0111\u1ebfn IT6. Ph\u1ea1m vi \u0111i\u1ec1u ch\u1ec9nh k\u00edch th\u01b0\u1edbc c\u1ee7a n\u00f3 l\u00e0 5 mm v\u00e0 \u0111\u1ed9 l\u1ec7ch c\u1ee7a \u0111\u01b0\u1eddng trung t\u00e2m l\u00e0 nh\u1ecf nh\u1ea5t trong s\u1ed1 m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p. Nguy\u00ean l\u00fd gia c\u00f4ng c\u1ee7a m\u00e1y khoan \u1ed1ng tay \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong H\u00ecnh 6. D\u1ee5ng c\u1ee5 n\u00e0y ch\u1ec9 c\u1eaft ph\u1ea7n th\u00e0nh ngo\u00e0i c\u1ee7a l\u1ed7 v\u00e0 k\u00e9o ph\u1ea7n t\u00e2m c\u1ee7a l\u1ed7 ra. C\u00f4ng su\u1ea5t c\u1eaft nh\u1ecf h\u01a1n so v\u1edbi khoan, ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng, ti\u1ebft ki\u1ec7m \u0111i\u1ec7n v\u00e0 lo\u1ea1i b\u1ecf phoi. Thanh tay \u00e1o c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u0111\u1ec3 gia c\u00f4ng c\u00e1c v\u1eadt li\u1ec7u qu\u00fd.<\/p>

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\n\nH\u00ecnh 5\n\n<\/p>

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H\u00ecnh 6 B\u1ed9 v\u1eadt li\u1ec7u v\u00e0 m\u0169i khoan<\/p>

Khi c\u00e1c d\u1ee5ng c\u1ee5 c\u1eaft l\u1ed7 s\u00e2u BTA \u0111\u01b0\u1ee3c gia c\u00f4ng, ch\u00fang ph\u1ea3i c\u00f3 h\u1ec7 th\u1ed1ng cung c\u1ea5p ch\u1ea5t l\u1ecfng l\u00e0m m\u00e1t ho\u00e0n ch\u1ec9nh. C\u00e1c ch\u1ea5t l\u00e0m m\u00e1t v\u1edbi t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y v\u00e0 \u00e1p su\u1ea5t kh\u00e1c nhau c\u1ea7n thi\u1ebft cho qu\u00e1 tr\u00ecnh gia c\u00f4ng l\u1ed7 s\u00e2u c\u1ee7a c\u00e1c lo\u1ea1i d\u1ee5ng c\u1ee5 kh\u00e1c nhau v\u1edbi c\u00e1c kh\u1ea9u \u0111\u1ed9 kh\u00e1c nhau. T\u1ed1c \u0111\u1ed9 c\u1eaft v\u00e0 t\u1ed1c \u0111\u1ed9 c\u1eaft ph\u00f9 h\u1ee3p cho m\u1ed7i l\u01b0\u1ee3t \u0111\u01b0\u1ee3c cung c\u1ea5p cho c\u00e1c v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c x\u1eed l\u00fd kh\u00e1c nhau, c\u0169ng nh\u01b0 c\u00e1c lo\u1ea1i l\u01b0\u1ee1i c\u1eaft ph\u00f9 h\u1ee3p v\u00e0 lo\u1ea1i m\u00e1y c\u1eaft phoi \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb. \u0110\u1ec3 cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng \u0111\u1ea1t \u0111\u01b0\u1ee3c qu\u00e1 tr\u00ecnh x\u1eed l\u00fd tr\u01a1n tru v\u00e0 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 gia c\u00f4ng l\u1ed7 s\u00e2u c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn.<\/p><\/div>","protected":false},"excerpt":{"rendered":"

Deep-hole drills are often divided into external chip removal (also known as gun drill), internal chip removal (often abbreviated as BTA by the International Association of Deep-hole Drilling), nesting or spraying chip removal. This paper mainly introduces the development and application of the principle of deep hole drill with internal chip removal. Generally speaking, the…<\/p>","protected":false},"author":2,"featured_media":19311,"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-3748","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\/08\/\u56fe\u72471-1.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/3748","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=3748"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/3748\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media\/19311"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=3748"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=3748"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=3748"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}