JPH0451319U - - Google Patents
Info
- Publication number
- JPH0451319U JPH0451319U JP9225790U JP9225790U JPH0451319U JP H0451319 U JPH0451319 U JP H0451319U JP 9225790 U JP9225790 U JP 9225790U JP 9225790 U JP9225790 U JP 9225790U JP H0451319 U JPH0451319 U JP H0451319U
- Authority
- JP
- Japan
- Prior art keywords
- tip
- sintered body
- drill
- polycrystalline sintered
- edge tip
- 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
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 229910052582 BN Inorganic materials 0.000 claims 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims 1
- 229910003460 diamond Inorganic materials 0.000 claims 1
- 239000010432 diamond Substances 0.000 claims 1
Landscapes
- Drilling Tools (AREA)
Description
第１図は、本考案ドリルの一実施例を示す要部
の正面図、第２図は、その側面図、第３図は、中
央チツプおよび外周刃チツプの接続部分における
説明図である。
１……ドリル本体、３……すり割溝、４……切
刃チツプ、４ａ……中央刃チツプ、４ｂ……外周
刃チツプ、７……面取り、８……切欠き。
FIG. 1 is a front view of the main parts of an embodiment of the drill of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is an explanatory view of the connecting portion between the central tip and the peripheral cutting tip. 1... Drill body, 3... Slit groove, 4... Cutting edge tip, 4a... Center edge tip, 4b... Peripheral edge tip, 7... Chamfer, 8... Notch.
Claims (1)
割溝３内には、ダイヤモンド、立方晶窒化硼素な
どの多結晶焼結体からなる切刃チツプ４がろう付
けされるようにしたドリルにおいて、 前記切刃チツプ４は、中央刃チツプ４ａおよび
これの両側に位置する外周刃チツプ４ｂからなり
、しかも回転中心を基準にしたときには、その接
続部分が異なつた半径距離にあるとともに、対向
関係にある面取り７，７によつて切欠き８が形成
されるようにしたことを特徴とするドリル。 (2) 前記中央刃チツプ４ａは、耐欠損性にすぐ
れた多結晶焼結体から構成され、外周刃チツプ４
ｂは、耐摩耗性にすぐれた多結晶焼結体から構成
されている請求項１記載のドリル。[Claims for Utility Model Registration] (1) In the slot 3 provided at the center of the tip of the drill body 1, there is a cutting tip 4 made of a polycrystalline sintered body such as diamond or cubic boron nitride. In the drill, the cutting edge tip 4 is composed of a central edge tip 4a and peripheral edge tips 4b located on both sides of the center edge tip 4a, and when the center of rotation is taken as a reference, the connecting portions have different radii. A drill characterized in that a notch 8 is formed by chamfers 7, 7 which are located at a distance and are opposed to each other. (2) The central edge tip 4a is made of a polycrystalline sintered body with excellent fracture resistance, and the peripheral edge tip 4a is made of a polycrystalline sintered body with excellent fracture resistance.
2. The drill according to claim 1, wherein b is made of a polycrystalline sintered body having excellent wear resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9225790U JPH0451319U (en) | 1990-08-31 | 1990-08-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9225790U JPH0451319U (en) | 1990-08-31 | 1990-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0451319U true JPH0451319U (en) | 1992-04-30 |
Family
ID=31828571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9225790U Pending JPH0451319U (en) | 1990-08-31 | 1990-08-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0451319U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011101928A (en) * | 2009-11-11 | 2011-05-26 | Sumitomo Electric Hardmetal Corp | Brazing drill |
-
1990
- 1990-08-31 JP JP9225790U patent/JPH0451319U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011101928A (en) * | 2009-11-11 | 2011-05-26 | Sumitomo Electric Hardmetal Corp | Brazing drill |
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