JPS611314U - double-blade drilling tool - Google Patents
double-blade drilling toolInfo
- Publication number
- JPS611314U JPS611314U JP8532984U JP8532984U JPS611314U JP S611314 U JPS611314 U JP S611314U JP 8532984 U JP8532984 U JP 8532984U JP 8532984 U JP8532984 U JP 8532984U JP S611314 U JPS611314 U JP S611314U
- Authority
- JP
- Japan
- Prior art keywords
- tool body
- recess
- drilling tool
- blade drilling
- 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.)
- Granted
Links
Landscapes
- Drilling Tools (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第1図ないし第4図はこの考案の一実施例を示し、第1
図はその底面視図、第2図はその一部省略側面図、第3
図は第1図の■一■線矢視断面図、第4図は第1図の一
部を省略した拡大図、第5図および第6図は従来の二枚
刃のドリルの一例を示し、第5図はその底面視図、第6
図はその一部省略側面図、第7図ないし第10図は従来
の二枚刃のドリルの他の例を示し、第7図はその底面視
図、第8図はその一部の省略側面図、第9図は第7図の
IX−IX線矢視断面図、第10図は第7図の一部を省
略した拡大図である。
1・・・・・・ドリル本体(工具本体)、2,3・・・
・・・切刃、2a*3a・・・・・・内端縁、4,5・
・・・・・切屑排出溝、6・・・・・・凹部、6a・・
・・・・底面、6b,6c・・・・・・側壁面、6d,
6e・・・・・・傾斜面、0・・・・・・回転中心。Figures 1 to 4 show one embodiment of this invention.
The figure is a bottom view, the second figure is a partially omitted side view, and the third figure is a partially omitted side view.
The figure is a cross-sectional view taken along the line 1 and 2 in Figure 1, Figure 4 is an enlarged view of Figure 1 with a part omitted, and Figures 5 and 6 show an example of a conventional two-blade drill. , Fig. 5 is its bottom view, and Fig. 6 is its bottom view.
The figure is a partially omitted side view, Figs. 7 to 10 show other examples of the conventional two-blade drill, Fig. 7 is a bottom view thereof, and Fig. 8 is a partially omitted side view. 9 is a sectional view taken along the line IX--IX in FIG. 7, and FIG. 10 is an enlarged view with a part of FIG. 7 omitted. 1...Drill body (tool body), 2, 3...
... Cutting edge, 2a*3a ... Inner edge, 4, 5.
...Chip discharge groove, 6...Recess, 6a...
...Bottom surface, 6b, 6c...Side wall surface, 6d,
6e: Inclined surface, 0: Center of rotation.
Claims (1)
から0.1〜1.25771771離れた点対称位置に
配置された2つの切刃を形成し、これら2つの切刃に対
応して前記工具本体の外周部に2つの切屑排出溝を形成
し、さらに前記工具本体の切刃のない先端部に各端部が
前記切屑排出溝にそれぞれ連通せしめられた凹部を形成
してなる2枚刃の穴明け工具において、前記凹部の底面
に前記回転中心上で交叉し、かつ回転中心から各切屑排
出溝側へ向かうにしたがって前記工具本体の先端側から
後端側へ向かうように傾く2つの傾斜面を形成するとと
もに、前記凹部の側壁面および凹部近傍の切刃を硬質皮
膜で被覆したことを特徴とする二枚刃の穴明け工具。Two cutting edges are formed at the tip of the tool body, each inner edge of which is arranged at a point symmetrical position 0.1 to 1.25771771 away from the rotation center of the tool body, and the tool body corresponds to the two cutting edges. two chip evacuation grooves are formed on the outer periphery of the tool body, and a recess is formed at the tip of the tool body without a cutting edge, each end of which is communicated with the chip evacuation groove. In a single-blade drilling tool, the bottom surface of the recess intersects with the center of rotation, and is inclined from the tip side to the rear end side of the tool body as it goes from the center of rotation toward each chip discharge groove. A two-blade drilling tool, characterized in that the side wall surface of the recess and the cutting edge near the recess are coated with a hard coating.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8532984U JPS611314U (en) | 1984-06-08 | 1984-06-08 | double-blade drilling tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8532984U JPS611314U (en) | 1984-06-08 | 1984-06-08 | double-blade drilling tool |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS611314U true JPS611314U (en) | 1986-01-07 |
JPH0243610Y2 JPH0243610Y2 (en) | 1990-11-20 |
Family
ID=30635625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8532984U Granted JPS611314U (en) | 1984-06-08 | 1984-06-08 | double-blade drilling tool |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS611314U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63267110A (en) * | 1987-04-21 | 1988-11-04 | Mitsubishi Metal Corp | Brazed drill |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS563119A (en) * | 1979-06-25 | 1981-01-13 | Mitsubishi Metal Corp | Coated miniature drill made of hard alloy metal |
JPS5676308U (en) * | 1979-11-15 | 1981-06-22 | ||
JPS5676307U (en) * | 1979-11-15 | 1981-06-22 |
-
1984
- 1984-06-08 JP JP8532984U patent/JPS611314U/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS563119A (en) * | 1979-06-25 | 1981-01-13 | Mitsubishi Metal Corp | Coated miniature drill made of hard alloy metal |
JPS5676308U (en) * | 1979-11-15 | 1981-06-22 | ||
JPS5676307U (en) * | 1979-11-15 | 1981-06-22 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63267110A (en) * | 1987-04-21 | 1988-11-04 | Mitsubishi Metal Corp | Brazed drill |
Also Published As
Publication number | Publication date |
---|---|
JPH0243610Y2 (en) | 1990-11-20 |
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