JPS6257807A - Drill - Google Patents
DrillInfo
- Publication number
- JPS6257807A JPS6257807A JP19683485A JP19683485A JPS6257807A JP S6257807 A JPS6257807 A JP S6257807A JP 19683485 A JP19683485 A JP 19683485A JP 19683485 A JP19683485 A JP 19683485A JP S6257807 A JPS6257807 A JP S6257807A
- Authority
- JP
- Japan
- Prior art keywords
- drill
- diameter
- blade
- shank
- roundness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
この発明は、例えば極微小径マイクロドリルのように刃
部に対してシャンク部が大径になされたドリルに関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drill in which the shank portion has a larger diameter than the blade portion, such as an extremely small diameter microdrill.
「従来の技術」
近年、電子部品等の精密加工に極微小径マイクロドリル
が使用されるようになってきている。"Prior Art" In recent years, micro drills with extremely small diameters have come to be used for precision machining of electronic components and the like.
従来、このような極微小径マイクロドリルとしては、第
４図に符号１で示すような乙のが知られている。この極
微小径゛マイクロドリルｌは、先端側の刃部１１と、後
端側のシャンク部１２と、これら刃部１１とシャンク部
１２との間に形成された連設部Ｉ３とが備えられており
、連設部１３は、刃部１１からシャンク部１２へ向って
順次形成された先端側テーパ一部１４、ストレート部１
５および後端側テーパ一部１６とから構成されている。Conventionally, as such an extremely small diameter micro drill, a type shown by reference numeral 1 in FIG. 4 is known. This extremely small diameter micro drill l is equipped with a blade part 11 on the front end side, a shank part 12 on the rear end side, and a continuous part I3 formed between the blade part 11 and the shank part 12. The continuous portion 13 includes a distal end tapered portion 14 and a straight portion 1 formed sequentially from the blade portion 11 to the shank portion 12.
5 and a rear end side tapered portion 16.
「発明が解決しようとする間圧点」
ところで、上記の極微小径マイクロドリルｌにあっては
、刃部１１と先端側テーパ一部１４との接続部およびス
トレート部１５と後端側テーパ一部１６との接続部にお
いて直径が大きく変化するため、それら接続部に応力が
集中して、そこから破損が生じ易いという問題点、ある
いは、破損しないまでも接続部において曲がりが発生し
て、加工穴の真直性および真円度が低下するという問題
点があった。"Pressure point to be solved by the invention" By the way, in the above-mentioned extremely small diameter micro drill l, there are Since the diameter changes greatly at the connection parts with 16, there is a problem that stress is concentrated at these connection parts and damage is likely to occur from there, or even if it does not break, bending occurs at the connection part and the machining hole There was a problem in that the straightness and roundness of the steel were reduced.
また、この種の極微小径マイクロドリルにあっては、高
速回転時の振動を防止するため、各部の同心性を高く維
持する必要があるか、このドリルＩにあっては、刃部１
１．ストレート部１５およびシャンク部１２について同
心性を維持する必要があり、精度の保持が難しいという
問題点があった。In addition, in this type of extremely small diameter micro drill, in order to prevent vibration during high speed rotation, it is necessary to maintain high concentricity of each part, or in this drill I, the blade part 1
1. It is necessary to maintain the concentricity of the straight portion 15 and the shank portion 12, which poses a problem in that it is difficult to maintain accuracy.
「発明の目的」
この発明は、ドリルの破損を防止することができるとと
もに、加工穴の真直度および真円度を向上させることが
でき、またドリルの製造工程において各部の同心性を容
易に維持することができるドリルを提供することを目的
とする。``Object of the Invention'' This invention can prevent damage to the drill, improve the straightness and roundness of the drilled hole, and easily maintain the concentricity of each part in the drill manufacturing process. The purpose is to provide a drill that can.
「発明の構成」
この発明は、連設部を、その径が刃部の径からシャンク
部の径まで連続的に増大するように形成した構成とした
しのである。[Configuration of the Invention] The present invention has a configuration in which the diameter of the continuous portion increases continuously from the diameter of the blade portion to the diameter of the shank portion.
「実施例」
以下、この発明の実施例について第１図ないし第３図を
参照して説明する。なお、これらの図において、従来例
と同一構成の部分には同一符号を付して、その説明を省
略する。"Embodiments" Examples of the present invention will be described below with reference to FIGS. 1 to 3. In addition, in these figures, the same reference numerals are given to the parts having the same configuration as those of the conventional example, and the explanation thereof will be omitted.
第１図は、この発明に係る極微小径マイクロドリル（ド
リル）２を示す図である。このドリル２は、刃部Ｉｔの
外径が０．２ｍｍ以下のドリルであって、刃部１１とシ
ャンク部１２との間に、外径の増大率が一様なテーパ一
部（連設部）２１が設けられている。このテーパ一部２
１と前記刃部１１との間には、これらテーパ一部２１の
外周面と刃部１１の外周面とに滑らかに連なる曲面部２
２が設けられている。なお、この曲面部２２は、加工時
に自然摩耗する砥石のだれによる緩和曲面でもよい。FIG. 1 is a diagram showing an extremely small diameter micro drill (drill) 2 according to the present invention. This drill 2 is a drill in which the outer diameter of the blade part It is 0.2 mm or less, and a taper part (continuous part ) 21 are provided. This taper part 2
1 and the blade portion 11, there is a curved surface portion 2 that is smoothly connected to the outer peripheral surface of these tapered portions 21 and the outer peripheral surface of the blade portion 11.
2 is provided. Note that this curved surface portion 22 may be a relaxed curved surface due to the wear of a grindstone that naturally wears down during processing.
このようなドリル２にあっては、刃部１１とンヤンク部
１２との間に外径の増大率が一様なテーパ一部２１を備
えているから、従来の極微小径マイクロドリル１に対し
て、前記刃部１１の外周面に対するテーパ一部２１の外
周面の傾斜角が小さくなる。したがって、応力集中が生
じにくく、ドリルの破損を防止することができるととも
に、バックリングをなくすことができ、加工穴の真直度
および真円度を向上させることができる。また、円柱状
の部分が刃部１１とシャンク部１２との２個所のみであ
るため、同心度が出しやすく、容易に高い同心度で加工
することができる。Since such a drill 2 has a tapered portion 21 with a uniform increase rate in outer diameter between the blade portion 11 and the yank portion 12, it is different from the conventional ultra-fine diameter micro drill 1. , the angle of inclination of the outer circumferential surface of the tapered portion 21 with respect to the outer circumferential surface of the blade portion 11 becomes smaller. Therefore, stress concentration is less likely to occur, and damage to the drill can be prevented, buckling can be eliminated, and the straightness and roundness of the machined hole can be improved. Further, since there are only two cylindrical portions, the blade portion 11 and the shank portion 12, concentricity can be easily achieved and processing can be easily performed with high concentricity.
また、この実施例においては、刃部１１とテーパ一部２
Ｉとの間に曲面部２２が設けられているから、この部分
の応力集中をさらに小さくすることができ、ドリルの破
損をなお一層防止することができる。Further, in this embodiment, the blade portion 11 and the tapered portion 2
Since the curved surface part 22 is provided between the drill part I, stress concentration in this part can be further reduced, and damage to the drill can be further prevented.
なお、上記ドリル２においては、刃部Ｉｆとテーパ一部
２１との間には曲面部２２が設けられているが、これに
限る必要はなく、曲面部２２の代わりに、外径の増大率
が刃部１１からテーパ一部２１へ徐々に変化する多数の
円錐面を設けてもよい。また、曲面部２２を設けず、刃
部１１の外周面とテーパ一部２１の外周面とを稜線を介
して直接交差させてもよい。In addition, in the drill 2, the curved surface portion 22 is provided between the blade portion If and the tapered portion 21, but it is not limited to this, and instead of the curved surface portion 22, an increase rate of the outer diameter is provided. It is also possible to provide a number of conical surfaces in which the angle gradually changes from the blade portion 11 to the tapered portion 21. Alternatively, the curved surface portion 22 may not be provided, and the outer circumferential surface of the blade portion 11 and the outer circumferential surface of the tapered portion 21 may directly intersect via the ridge line.
次に、第２図は、本発明に係る他の実施例である極微小
径マイクロドリル（ドリル）３を示すものである。この
ドリル３においては、刃部１１とノヤンク部１２との間
に、ラッパ状テーパ一部（連設部）３１が前記刃部１１
の外周面に滑らかに接続されて設けられている。このラ
ッパ状テーパ一部３１は、その外径が、゛外径の増大率
が前記刃部１１側から前記シャンク部１２側へ向かうに
従い漸次増大するように形成されており、例えば、凹形
曲線、円弧曲線、だ円曲線、双曲線等の軸回転曲面から
なっている。なお、このラッパ状テーパ一部３１の外周
面は、刃部ＩＩの溝部および切刃を加工する砥石と干渉
しないように形成されているのは勿論である。Next, FIG. 2 shows an extremely small diameter micro drill (drill) 3 which is another embodiment of the present invention. In this drill 3, a trumpet-shaped taper portion (continuous portion) 31 is provided between the blade portion 11 and the noyank portion 12.
It is smoothly connected to the outer peripheral surface of the This trumpet-shaped tapered portion 31 is formed such that its outer diameter gradually increases from the blade portion 11 side to the shank portion 12 side, such as a concave curve. It consists of axially rotating curved surfaces such as , circular arc curves, elliptical curves, and hyperbolas. It goes without saying that the outer circumferential surface of this trumpet-shaped tapered portion 31 is formed so as not to interfere with the groove of the blade portion II and the grindstone for machining the cutting edge.
このようなドリル３にあっては、刃部１１とノヤンク部
１２との間に外径の増大率が漸次増大するラッパ状テー
パ一部３１を備えているから、前記ラッパ状テーパ一部
３１の前記刃部１１に近接する部分の外周面の前記刃部
１１の外周面に対する傾斜角を前記ドリル２よりもさら
に小さくすることかできる。したかって、応力集中が生
じにくく、ドリルの破損を防１Ｅオることができるとと
もに、バックリングをなくすことができ、加工穴の真直
度および真円塵を向−トさせることができる。また、ド
リル２と同様に円柱状の部分が刃部１． Ｉとシャンク
部１２との２個所のみであるため、同心度が出しや酎く
、容易に高い同心度で加工することができる。Since such a drill 3 is provided with a trumpet-shaped taper portion 31 whose outer diameter increases gradually between the blade portion 11 and the noyank portion 12, the trumpet-shaped taper portion 31 is The angle of inclination of the outer peripheral surface of the portion close to the blade portion 11 with respect to the outer peripheral surface of the blade portion 11 can be made smaller than that of the drill 2. Therefore, stress concentration is less likely to occur, and breakage of the drill can be prevented, buckling can be eliminated, and the straightness and roundness of the machined hole can be improved. Also, like the drill 2, the cylindrical part is the blade part 1. Since there are only two locations, the I and the shank portion 12, the concentricity is very good and it is easy to process with a high concentricity.
なお、このドリル３においては、ラッパ状テーパ一部３
Ｉとシャンク部Ｉ２とは、稜線を介して直接交差してい
るが、これに限る必要はなく、第３図に示す極微小径マ
イクロドリル（ドリル）４のように、これらラッパ状テ
ーパ一部３１とシャンク部１２とに滑らかに連なる外側
に凸な曲面部４１によって接続してもよい。In addition, in this drill 3, the trumpet-shaped taper part 3
I and the shank portion I2 directly intersect with each other via the ridge line, but it is not limited to this, and as in the extremely small diameter micro drill (drill) 4 shown in FIG. and the shank portion 12 may be connected by an outwardly convex curved surface portion 41 that smoothly continues.
ちなみに、」―記のような本発明のドリルによって穴明
は作業を行った結果、バックリング等の現象がなくなっ
たため、加工能率が従来のドリルに比べて２０％以上向
上した。By the way, as a result of drilling holes using the drill of the present invention as described above, phenomena such as buckling were eliminated, and the machining efficiency was improved by more than 20% compared to conventional drills.
「発明の効果」
以上に説明したように、この発明によれば、連設部を、
その径が刃部の径からシャンク部の径まで連続的に増大
するように形成しているから、ドリルの破損を防止する
ことができるとともに、加工穴の真直度および真円度を
向上させることかできるという効果が得られ、またドリ
ルの製造工程において各部の同心性を容易に維持するこ
とができるという効果かえられる。"Effects of the Invention" As explained above, according to the present invention, the continuous portion is
Since the diameter of the drill increases continuously from the diameter of the blade to the diameter of the shank, it is possible to prevent damage to the drill and improve the straightness and roundness of the drilled hole. This has the effect that the drill can be moved easily, and the concentricity of each part can be easily maintained in the manufacturing process of the drill.
第１図はこの発明の一実施例であるドリルを示す側面図
、第２図はこの発明の他の実施例を示す側面図、第３図
はこの発明の他の実施例を示す側面図、第４図は従来の
ドリルの一例を示す側面図である。
２・・・・・極微小径マイクロドリル（トリル）、３・
・・極微小径マイクロドリル（ドリル）、４・・・・・
・極微小径マイクロドリル（ドリル）、１１・・・・・
・刃部、１２・・・ ンヤンク部、２１・・・・・・テ
ーパ一部（連設部）、３１・・・・ラッパ状テーパ一部
（連設部）。FIG. 1 is a side view showing a drill which is an embodiment of the present invention, FIG. 2 is a side view showing another embodiment of the invention, and FIG. 3 is a side view showing another embodiment of the invention. FIG. 4 is a side view showing an example of a conventional drill. 2...Extremely small diameter micro drill (trill), 3.
...Ultra-fine diameter micro drill (drill), 4...
・Extremely small diameter micro drill (drill), 11...
-Blade part, 12... Yank part, 21... Part of the taper (continuous part), 31... Part of the trumpet-shaped taper (continuous part).
Claims (4)
と、前記刃部と前記シャンク部との間に設けられた連設
部とを有するドリルにおいて、前記連設部を、その径が
前記刃部の径から前記シャンク部の径まで連続的に増大
するように形成したことを特徴とするドリル。(1) A drill having a blade, a shank having a diameter larger than that of the blade, and a connecting portion provided between the blade and the shank, with the connecting portion being connected to the drill. A drill characterized in that the drill is formed so that its diameter increases continuously from the diameter of the blade portion to the diameter of the shank portion.
とする特許請求の範囲第１項記載のドリル。(2) The drill according to claim 1, wherein the diameter of the blade portion is 0.2 mm or less.
ることを特徴とする特許請求の範囲第１項または第２項
記載のドリル。(3) The drill according to claim 1 or 2, wherein the outer peripheral surface of the continuous portion has a uniform increase rate in outer diameter.
側から前記シャンク部側へ向かうに従い漸次増大するよ
うに形成されたことを特徴とする特許請求の範囲第１項
または第２項記載のドリル。(4) The outer circumferential surface of the continuous portion is formed such that the rate of increase in outer diameter gradually increases from the blade side to the shank side. Or the drill described in Section 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19683485A JPS6257807A (en) | 1985-09-05 | 1985-09-05 | Drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19683485A JPS6257807A (en) | 1985-09-05 | 1985-09-05 | Drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6257807A true JPS6257807A (en) | 1987-03-13 |
Family
ID=16364439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19683485A Pending JPS6257807A (en) | 1985-09-05 | 1985-09-05 | Drill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6257807A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0479005U (en) * | 1990-11-19 | 1992-07-09 | ||
| JPH0541616U (en) * | 1991-11-08 | 1993-06-08 | 哲雄 中山 | Equipment |
| JP2003039219A (en) * | 2001-07-30 | 2003-02-12 | Tohoku Sogo Kenkyusha:Kk | Drill |
| JP2005297124A (en) * | 2004-04-12 | 2005-10-27 | Nachi Fujikoshi Corp | Drill |
| WO2009072200A1 (en) * | 2007-12-05 | 2009-06-11 | Osg Corporation | Small-diameter rotary processing tool |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59224205A (en) * | 1983-05-23 | 1984-12-17 | フエデラル−モ−ギユル・コ−ポレ−シヨン | Micro-drill |
-
1985
- 1985-09-05 JP JP19683485A patent/JPS6257807A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59224205A (en) * | 1983-05-23 | 1984-12-17 | フエデラル−モ−ギユル・コ−ポレ−シヨン | Micro-drill |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0479005U (en) * | 1990-11-19 | 1992-07-09 | ||
| JPH0541616U (en) * | 1991-11-08 | 1993-06-08 | 哲雄 中山 | Equipment |
| JP2003039219A (en) * | 2001-07-30 | 2003-02-12 | Tohoku Sogo Kenkyusha:Kk | Drill |
| JP2005297124A (en) * | 2004-04-12 | 2005-10-27 | Nachi Fujikoshi Corp | Drill |
| WO2009072200A1 (en) * | 2007-12-05 | 2009-06-11 | Osg Corporation | Small-diameter rotary processing tool |
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