JPS63216611A - Drill - Google Patents
DrillInfo
- Publication number
- JPS63216611A JPS63216611A JP62049560A JP4956087A JPS63216611A JP S63216611 A JPS63216611 A JP S63216611A JP 62049560 A JP62049560 A JP 62049560A JP 4956087 A JP4956087 A JP 4956087A JP S63216611 A JPS63216611 A JP S63216611A
- Authority
- JP
- Japan
- Prior art keywords
- base metal
- drill
- oil supply
- hole
- supply hole
- 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
- 239000010953 base metal Substances 0.000 claims abstract description 38
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 238000005452 bending Methods 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract description 2
- 230000001050 lubricating effect Effects 0.000 abstract 4
- 238000007599 discharging Methods 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 28
- 230000007423 decrease Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 239000010730 cutting oil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/06—Drills with lubricating or cooling equipment
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
この発明は、２つの切屑排出溝と２つの給油孔が設けら
れた台金を有する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 having a base metal provided with two chip discharge grooves and two oil supply holes.
「従来の技術」
従来、上記のようなドリルとしては、第３図ないし第５
図に示すようなドリル１１が知られている。このドリル
１１は、台金１２の先端にむくチップ１３が設けられて
いる。前記台金１２は、ハイス台金からなるものであっ
て、断面円形状の台金本体１４を有している。この台金
本体１４の外周には、周方向に等間隔に２つの切屑排出
溝１５゜１５が先端から後方に向って形成されている。"Conventional technology" Conventionally, the drills described above are
A drill 11 as shown in the figure is known. This drill 11 is provided with a cutting tip 13 at the tip of a base metal 12. The base metal 12 is made of a high speed steel base metal, and has a base metal main body 14 having a circular cross section. On the outer periphery of the base metal body 14, two chip discharge grooves 15.degree. 15 are formed at equal intervals in the circumferential direction from the tip toward the rear.
この切屑排出溝１５は、回転方向を向く第１の平面１６
と回転方向と反対、の方向を向く第２の平面Ｉ７とこれ
らの面の間に設けられた第３の平面１８とからなる壁面
１９によって画成されている。前記台金本体【２のうち
、その外周面２０と前記第１の平面１６と前記第２の平
面１７とによって囲まれた２つの厚肉部２１には、断面
円形状の給油孔２２．２２が設けられている。This chip discharge groove 15 has a first plane 16 facing the direction of rotation.
It is defined by a wall surface 19 consisting of a second plane I7 facing in the direction of and opposite to the direction of rotation, and a third plane 18 provided between these planes. Of the base metal body [2], two thick parts 21 surrounded by the outer circumferential surface 20, the first plane 16, and the second plane 17 are provided with oil supply holes 22, 22 each having a circular cross section. is provided.
一方、前記むくチップ１３は、超硬台金からなるもので
あって、前記台金１２の切屑排出溝Ｉ５に連続する２つ
の切屑排出溝２３．２３が設けられている。この切屑排
出溝２３．２３の先端部には２っの切刃２４．２４が形
成されている。また、前記むくチップ＋３の先端面には
、前記給油孔２２に連通した油入２５，２５が開口して
おり、切刃２４．２４に切削油を供給するようになって
いる。On the other hand, the peeling tip 13 is made of a carbide base metal, and is provided with two chip discharge grooves 23 and 23 that are continuous with the chip discharge groove I5 of the base metal 12. Two cutting edges 24.24 are formed at the tip of this chip discharge groove 23.23. Furthermore, oil reservoirs 25, 25, which communicate with the oil supply hole 22, are opened at the distal end surface of the peeling tip +3, and supply cutting oil to the cutting blades 24, 24.
「発明が解決しようとする問題点」
ところで、上記ドリル１１にあっては、給油孔２２と外
周面２０との間の肉厚が薄くなり、台金１２の剛性が低
下するという問題点があった。また、剛性を強化しよう
として給油孔２２の内径を小さくすると、油量が不足し
てしまうという問題点があった。"Problems to be Solved by the Invention" By the way, the drill 11 described above has a problem in that the wall thickness between the oil supply hole 22 and the outer circumferential surface 20 becomes thinner, and the rigidity of the base metal 12 decreases. Ta. Furthermore, if the inner diameter of the oil supply hole 22 is made smaller in an attempt to strengthen the rigidity, there is a problem in that the amount of oil becomes insufficient.
「問題点を解決するための手段」
この発明は、上記の問題点を解決するためになされたも
ので、給油孔を、周方向に長軸を有する断面長円形状に
形成した構成とされている。"Means for Solving the Problems" This invention has been made to solve the above problems, and has a structure in which the oil supply hole is formed in an oval cross-section having a long axis in the circumferential direction. There is.
「作用」
この発明は、給油孔を、周方向に長袖を有する断面長円
形状に形成しているから、前記給油孔と・′ 前記外周
面および切屑排出溝との間の肉厚を厚くすることができ
、台金の剛性を向上させることができる。したがって、
ブツシュレス加工が可能になるとともに穴精度を向上さ
せることができる。"Function" In this invention, since the oil supply hole is formed in an oval cross-section with long sleeves in the circumferential direction, the wall thickness between the oil supply hole and the outer circumferential surface and the chip discharge groove is increased. It is possible to improve the rigidity of the base metal. therefore,
Buttonless processing becomes possible and hole accuracy can be improved.
また、台金の剛性を向上させることができるとともに、
給油孔の断面積を広くとることができ、油量を増加させ
ることができる。したがって、高送り加工が可能となる
とともに、工具寿命を向上させることができる。In addition, it is possible to improve the rigidity of the base metal, and
The cross-sectional area of the oil supply hole can be increased, and the amount of oil can be increased. Therefore, high feed machining becomes possible and tool life can be improved.
「実施例」
以下、この発明の一実施例について第１図および第２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。"Embodiment" An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. 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、この発明に係るドリル３Ｉの台金１２の断面
を示す図である。このドリル３１においては、給油孔３
２を、台金１２の周方向に長袖が配設された断面楕円形
状に形成している。FIG. 1 is a cross-sectional view of a base metal 12 of a drill 3I according to the present invention. In this drill 31, the oil supply hole 3
2 is formed to have an elliptical cross section with long sleeves arranged in the circumferential direction of the base metal 12.
このようなドリル３１の台金１２は、引き抜き加工によ
って、その外形および給油孔が形成される。したがって
、ガンドリルで形成しにくい断面楕円状の給油孔を容易
に形成することができる。The outer shape and oil supply hole of the base metal 12 of such a drill 31 are formed by drawing processing. Therefore, it is possible to easily form an oil supply hole having an elliptical cross section, which is difficult to form with a gun drill.
ところで、長尺の台金にガンドリルで給油孔を穿孔する
場合には、穴曲がりが生じやすい。このため、給油孔と
外周面および切屑排出溝との間の肉厚にばらつきが生じ
、台金強度が低下するという問題点があった。また、長
尺の台金の両端からガンドリルで穿孔する場合には、両
側から穿孔してきた孔がずれてしまうという問題点もあ
った。By the way, when drilling an oil supply hole in a long base metal with a gun drill, the hole is likely to be bent. For this reason, there is a problem in that the wall thickness between the oil supply hole, the outer circumferential surface, and the chip discharge groove varies, and the strength of the base metal decreases. Furthermore, when drilling holes from both ends of a long base metal using a gun drill, there is also a problem in that the holes drilled from both sides become misaligned.
これに対してこの台金にあっては、引き抜き加工を採用
しているので、穴曲がりを防止することができる。した
がって、給油孔と外周面および切屑排出溝との間の肉厚
にばらつきが生ずるのを防ぐことができ、台金の強度低
下を防止することができる。On the other hand, this base metal uses a drawing process, so that it is possible to prevent the hole from bending. Therefore, it is possible to prevent variations in wall thickness between the oil supply hole, the outer circumferential surface, and the chip discharge groove, and to prevent a decrease in strength of the base metal.
以上のように、上記ドリル３１にあっては、給油孔３２
を、台金１２の周方向に長袖が配設された断面楕円形状
に形成しているから、前記給油孔３２と外周面２０およ
び前記切屑排出溝１５の壁面１９との間の肉厚を厚くす
ることができ、台金１２の剛性を向上させることができ
る。したがって、ブツシュレス加工が可能になるととも
に穴精度を向上させることができる。また、台金１２の
剛性を向上させることができるとともに、給油孔３２の
断面積を広くとることができ、油量を増加させることが
できる。したがって、高送りが可能となるとともに、工
具寿命を向上させることができる。As described above, in the drill 31, the oil supply hole 32
is formed into an elliptical cross-sectional shape with a long sleeve arranged in the circumferential direction of the base metal 12, so that the wall thickness between the oil supply hole 32 and the outer peripheral surface 20 and the wall surface 19 of the chip discharge groove 15 is increased. Therefore, the rigidity of the base metal 12 can be improved. Therefore, it is possible to perform the buttless processing and improve the hole accuracy. Moreover, the rigidity of the base metal 12 can be improved, and the cross-sectional area of the oil supply hole 32 can be increased, so that the amount of oil can be increased. Therefore, high feed is possible and tool life can be improved.
なお、上記実施例においては、給油孔を断面楕円形状に
形成しているが、これに限る必要はなく、第２図に示す
ように、給油孔４１を２つの半円弧部４２．４２と２つ
の直線部４３．４３とからなる断面長穴状に形成しても
よい。In the above embodiment, the oil supply hole is formed to have an elliptical cross section, but there is no need to limit it to this, and as shown in FIG. It may also be formed into an elongated hole-like cross section consisting of two straight portions 43 and 43.
また、上記実施例においては、切屑排出溝として、第１
の平面１６と第２の平面１７と第３の平面１８とから画
成される切屑排出溝１５を採用しているが、これに限る
必要はなく、断面円弧状の切屑排出溝でもよい。In addition, in the above embodiment, the first chip discharge groove is
Although a chip discharge groove 15 defined by a plane 16, a second plane 17, and a third plane 18 is employed, it is not limited to this, and a chip discharge groove having an arcuate cross section may be used.
「発明の効果」
以上に説明したように、この発明によれば、給油孔を、
周方向に長袖を有する断面長円形状に形成しているから
、台金の剛性を向上させることができ、したがってブツ
シュレス加工が可能になるとともに穴精度を向上させる
ことができ、また、台金の剛性向上とともに油量を増加
させることができ、したがって、高送りが可能となると
ともに、工具寿命を向上させることができるという効果
が得られる。"Effects of the Invention" As explained above, according to this invention, the oil supply hole is
Since it is formed into an oval cross-sectional shape with long sleeves in the circumferential direction, the rigidity of the base metal can be improved, making it possible to perform buttressless processing and improving hole accuracy. In addition to improving the rigidity, the amount of oil can be increased, and therefore high feed is possible and tool life can be improved.
第１図は本発明の一実施例を示す第４図と同様の位置の
断面図、第２図は本発明の他の実施例を示す第１図と同
様の位置の断面図、第３図ないし第５図は従来のドリル
の一例を示す図であって、第３図はその側面図、第４図
は第３図中ＩＶ−ＩＶ線に沿う矢視断面図、第５図はそ
の軸線方向先端親図である。
１２・・・・・台金、１３・・・・・・むくチップ、１
４・・・・・・台金本体、Ｉ５・・・・切屑排出溝、１
９・・・・壁面、２０・・・・・・外周面、２Ｉ・・・
・・厚肉部、２２・・・・・給油孔、３１・・・・・ド
リル、３２・・・・・・給油孔、４１・・・・・給油孔
。FIG. 1 is a cross-sectional view at the same position as FIG. 4 showing one embodiment of the present invention, FIG. 2 is a cross-sectional view at the same position as FIG. 1 showing another embodiment of the present invention, and FIG. 5 to 5 are views showing an example of a conventional drill, in which FIG. 3 is a side view thereof, FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3, and FIG. 5 is an axial line thereof. It is a direction tip main figure. 12...Base metal, 13...Peel chip, 1
4...Base metal body, I5...Chip discharge groove, 1
9...Wall surface, 20...Outer peripheral surface, 2I...
... Thick wall part, 22 ... Oil supply hole, 31 ... Drill, 32 ... Oil supply hole, 41 ... Oil supply hole.
Claims (1)
切屑排出溝が先端から後方に向って形成されるとともに
、前記台金本体の外周面と前記切屑排出溝を画成する壁
面とに囲まれる厚肉部に軸心部をはさんで２つの給油孔
が台金本体先端から後方に向って形成された台金と、こ
の台金の先端に設けられたむくチップとを備えたドリル
において、前記給油孔を、周方向に長軸を有する断面長
円形状に形成したことを特徴とするドリル。Two chip discharge grooves are formed at equal intervals in the circumferential direction on the outer periphery of the base metal main body having a circular cross-section, and the wall surface defines the outer peripheral surface of the base metal main body and the chip discharge groove. The base metal includes a base metal in which two oil supply holes are formed rearward from the tip of the base metal body with the shaft center sandwiched between the thick wall part surrounded by the base metal, and a bare tip provided at the tip of the base metal. A drill characterized in that the oil supply hole is formed in an oval cross-section having a long axis in the circumferential direction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62049560A JPS63216611A (en) | 1987-03-04 | 1987-03-04 | Drill |
| KR1019880000341A KR940011175B1 (en) | 1987-03-04 | 1988-01-18 | Drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62049560A JPS63216611A (en) | 1987-03-04 | 1987-03-04 | Drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63216611A true JPS63216611A (en) | 1988-09-08 |
Family
ID=12834588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62049560A Pending JPS63216611A (en) | 1987-03-04 | 1987-03-04 | Drill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63216611A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004056519A3 (en) * | 2002-12-19 | 2004-09-16 | Guehring Joerg | Cooling channel geometry |
| JP2006510494A (en) * | 2002-12-19 | 2006-03-30 | ギューリング，イェルク | Cooling channel structure |
| US7476066B2 (en) * | 2002-04-03 | 2009-01-13 | Tbt Tiefbohrtechnik Gmbh + Co. | Drilling device provided with a multi-bladed drilling tool, especially a deep drilling tool |
| WO2014147240A1 (en) * | 2013-03-21 | 2014-09-25 | Gühring KG | Multi-lip drilling tool having internal cooling ducts |
| CN105050758A (en) * | 2013-03-26 | 2015-11-11 | Osg株式会社 | Three-bladed drill with cutting fluid supply hole |
| US9604286B2 (en) | 2013-01-29 | 2017-03-28 | Osg Corporation | Drill |
| US10814406B1 (en) * | 2019-04-24 | 2020-10-27 | Raytheon Technologies Corporation | Internal cooling passages for rotating cutting tools |
-
1987
- 1987-03-04 JP JP62049560A patent/JPS63216611A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7476066B2 (en) * | 2002-04-03 | 2009-01-13 | Tbt Tiefbohrtechnik Gmbh + Co. | Drilling device provided with a multi-bladed drilling tool, especially a deep drilling tool |
| WO2004056519A3 (en) * | 2002-12-19 | 2004-09-16 | Guehring Joerg | Cooling channel geometry |
| JP2006510494A (en) * | 2002-12-19 | 2006-03-30 | ギューリング，イェルク | Cooling channel structure |
| US7134813B2 (en) | 2002-12-19 | 2006-11-14 | Joerg Guehring | Cooling channel geometry |
| JP2011121173A (en) * | 2002-12-19 | 2011-06-23 | Guehring Joerg | Cooling channel geometry |
| US9604286B2 (en) | 2013-01-29 | 2017-03-28 | Osg Corporation | Drill |
| WO2014147240A1 (en) * | 2013-03-21 | 2014-09-25 | Gühring KG | Multi-lip drilling tool having internal cooling ducts |
| US9636756B2 (en) | 2013-03-21 | 2017-05-02 | Guehring Kg | Multi-lip drilling tool with internal cooling ducts |
| CN105050758A (en) * | 2013-03-26 | 2015-11-11 | Osg株式会社 | Three-bladed drill with cutting fluid supply hole |
| US9623490B2 (en) | 2013-03-26 | 2017-04-18 | Osg Corporation | Three-bladed drill with cutting fluid supply hole |
| US10814406B1 (en) * | 2019-04-24 | 2020-10-27 | Raytheon Technologies Corporation | Internal cooling passages for rotating cutting tools |
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