JPS58146613U - Drill - Google Patents
DrillInfo
- Publication number
- JPS58146613U JPS58146613U JP4301482U JP4301482U JPS58146613U JP S58146613 U JPS58146613 U JP S58146613U JP 4301482 U JP4301482 U JP 4301482U JP 4301482 U JP4301482 U JP 4301482U JP S58146613 U JPS58146613 U JP S58146613U
- Authority
- JP
- Japan
- Prior art keywords
- edge
- cutting edge
- cutting
- drill
- bulge
- 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図および第2図は従来のドリルの一例を示し、第1
図はその一部省略正面図、第2図はその底面視図、第3
図は従来のドリルの他の例を示す底面視図、第4図は第
1図および第2図のドリルの食い付き時における一部省
略拡大正面図、第5図は第3図のドリルの第4図と同様
の図、第6図はこの考案の一実施例を示す底面視図、第
7図はこの考案の他の実施例を示す底面視図、第8図お
よび第9図はそれぞれこの考案のさらに他の実施例の底
面視図における回転中心部の拡大図である。
1・・・・・・工具本体、2・・・・・・切刃チップ、
6・・・・・・内端縁、11・・・・・・切刃、13・
・・・・・直線部、14・・・・・・外端縁、15.1
6・・・・・・直線部、0・・・・・・回転中心、l工
・・・・・・直線。
第4図
第5図−Figures 1 and 2 show an example of a conventional drill.
The figure is a partially omitted front view, Figure 2 is a bottom view, and Figure 3 is a partially omitted front view.
The figure is a bottom view showing another example of a conventional drill, FIG. 4 is a partially omitted enlarged front view of the drill shown in FIGS. 1 and 2 when biting, and FIG. 6 is a bottom view showing one embodiment of this invention; FIG. 7 is a bottom view showing another embodiment of this invention; FIGS. 8 and 9 are respectively It is an enlarged view of the center of rotation in a bottom view of still another embodiment of this invention. 1... Tool body, 2... Cutting tip,
6... Inner edge, 11... Cutting edge, 13.
...Straight line part, 14...Outer edge, 15.1
6...Straight line, 0...Rotation center, l-work...Straight line. Figure 4 Figure 5-
Claims (1)
に関与する部分の内端縁を工具本体の回転中心から回転
中心部にコアが生成し始める値より小さい距離だけ離し
て設けたドリルにおいて、前記切刃は底面視において切
刃の内端縁と外端縁とを結ぶ直線に対して回転方向に向
かって膨出するように形成されており、前記切刃の内端
縁と外端縁との間の内周部には少なくとも1つの直線部
があり、この直線部とこれに隣接する部分とを回転方向
に膨出するように湾曲させて滑らかに連結したことを特
徴とするドリル。The tool body has a cutting edge at its tip, and the inner edge of the part of the cutting edge that is actually involved in cutting is separated from the rotation center of the tool body by a distance smaller than the value at which a core begins to form at the rotation center. In the provided drill, the cutting edge is formed to bulge in the rotation direction with respect to a straight line connecting the inner end edge and the outer end edge of the cutting edge when viewed from the bottom, and the inner end of the cutting edge There is at least one straight part in the inner peripheral part between the edge and the outer edge, and this straight part and the part adjacent to this are curved so as to bulge in the rotational direction and are smoothly connected. Featured drill.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4301482U JPS58146613U (en) | 1982-03-26 | 1982-03-26 | Drill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4301482U JPS58146613U (en) | 1982-03-26 | 1982-03-26 | Drill |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58146613U true JPS58146613U (en) | 1983-10-03 |
JPH0222172Y2 JPH0222172Y2 (en) | 1990-06-14 |
Family
ID=30054112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4301482U Granted JPS58146613U (en) | 1982-03-26 | 1982-03-26 | Drill |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58146613U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61270010A (en) * | 1985-05-24 | 1986-11-29 | Toshiba Tungaloy Co Ltd | Drilling tool |
-
1982
- 1982-03-26 JP JP4301482U patent/JPS58146613U/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61270010A (en) * | 1985-05-24 | 1986-11-29 | Toshiba Tungaloy Co Ltd | Drilling tool |
Also Published As
Publication number | Publication date |
---|---|
JPH0222172Y2 (en) | 1990-06-14 |
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