JPH0181209U - - Google Patents
Info
- Publication number
- JPH0181209U JPH0181209U JP1987178431U JP17843187U JPH0181209U JP H0181209 U JPH0181209 U JP H0181209U JP 1987178431 U JP1987178431 U JP 1987178431U JP 17843187 U JP17843187 U JP 17843187U JP H0181209 U JPH0181209 U JP H0181209U
- Authority
- JP
- Japan
- Prior art keywords
- cutting edge
- chip discharge
- discharge groove
- cutting
- chisel
- 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.)
- Granted
Links
- 238000005553 drilling Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 2
Landscapes
- Drilling Tools (AREA)
Description
図は、いずれも本考案による穿孔工具を示した
もので、第１図は正面図、第２図ａは第１図の軸
方向先端視の拡大図、第２図ｂは第２図ａの中心
部切刃の正面展開図、第２図ｃは第２図ａの中心
部切刃の側面展開図、第３図は第２図ａの中心部
の拡大図などである。
１−−−ドリル、１０ａ，１０ｂ−−−切屑排
出溝、１１−−−チゼル、１２ａ，１２ｂ−−−
切り落し面、１３ａ，１３ｂ−−−逆げ面、１４
ａ，１４ｂ−−−中心部切刃、１５ａ，１５ｂ−
−−すくい面、１６ａ，１６ｂ−−−外周側切刃
、１７ａ，１７ｂ−−−凹溝、１８ａ，１８ｂ−
−−凹切刃。
The drawings all show the drilling tool according to the present invention: Fig. 1 is a front view, Fig. 2 a is an enlarged view of the tip in the axial direction of Fig. 1, and Fig. 2 b is an enlarged view of Fig. 2 a. FIG. 2c is a front development view of the center cutting edge, FIG. 2c is a side development view of the center cutting edge of FIG. 2a, and FIG. 3 is an enlarged view of the center of FIG. 2a. 1---Drill, 10a, 10b---Chip discharge groove, 11---Chisel, 12a, 12b---
Cut-off surface, 13a, 13b --- Reverse surface, 14
a, 14b---Central cutting edge, 15a, 15b-
--Rake face, 16a, 16b---Outer cutting edge, 17a, 17b---Concave groove, 18a, 18b-
--Concave cutting edge.
Claims (1)
つて切屑排出溝を形成させ、該切刃の軸方向先端
視において、軸中心部には０．１〜０．５mm巾の
チゼルと、該チゼルの傾斜角に対してプラス側と
する切り落し面と逆げ面とによつて設ける中心部
切刃と、すくい面と逆げ面とから形成する外周側
切刃を有し、前記中心部切刃と外周側切刃を含む
凹切刃を形成させる凹溝を前記切屑排出溝の軸方
向沿つて形成させたことを特徴とする切屑排出溝
を有する穿孔工具。 A cutting blade is formed on the end surface, and a chip discharge groove is formed continuously in the axial direction of the cutting blade, and a chisel with a width of 0.1 to 0.5 mm is provided at the center of the shaft when viewed from the axial tip of the cutting blade. and a central cutting edge formed by a cutting surface and a reversed surface that are on the positive side with respect to the inclination angle of the chisel, and an outer peripheral cutting edge formed by a rake surface and a reversed surface, A drilling tool having a chip discharge groove, characterized in that a concave groove forming a concave cutting edge including a central cutting edge and an outer peripheral cutting edge is formed along the axial direction of the chip discharge groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17843187U JPH0632251Y2 (en) | 1987-11-23 | 1987-11-23 | Drilling tool with chip discharge groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17843187U JPH0632251Y2 (en) | 1987-11-23 | 1987-11-23 | Drilling tool with chip discharge groove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0181209U true JPH0181209U (en) | 1989-05-31 |
| JPH0632251Y2 JPH0632251Y2 (en) | 1994-08-24 |
Family
ID=31470050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17843187U Expired - Lifetime JPH0632251Y2 (en) | 1987-11-23 | 1987-11-23 | Drilling tool with chip discharge groove |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0632251Y2 (en) |
-
1987
- 1987-11-23 JP JP17843187U patent/JPH0632251Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0632251Y2 (en) | 1994-08-24 |