JPH02121902U - - Google Patents
Info
- Publication number
- JPH02121902U JPH02121902U JP3103589U JP3103589U JPH02121902U JP H02121902 U JPH02121902 U JP H02121902U JP 3103589 U JP3103589 U JP 3103589U JP 3103589 U JP3103589 U JP 3103589U JP H02121902 U JPH02121902 U JP H02121902U
- Authority
- JP
- Japan
- Prior art keywords
- cutting edge
- line
- tip
- convex arc
- drill
- 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
- 230000000149 penetrating effect Effects 0.000 claims description 9
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical group O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Drilling Tools (AREA)
Description
第１図は本考案の一枚刃の貫通錐の正面図、第
２図は同側面図、第３図は正面図先端部の拡大図
、第４図は刃先端視図、第５図は本考案の貫通錐
の切削状態を示す図、第６図は本考案の二枚刃の
貫通錐の正面先端部の拡大図、第７図は同刃先端
視図、第８図、第９図は先端刃先線の他の実施例
を示す図、第１０図は従来の二枚刃の貫通錐を示
す図、第１１図はその切削状態図である。
３……錐部、７……側面刃先線、８……切刃コ
ーナ部、９……凸円弧の先端刃先線、１０……中
心刃先線、Ａ……最尖端点。
Figure 1 is a front view of the single-blade penetrating drill of the present invention, Figure 2 is a side view of the same, Figure 3 is an enlarged view of the tip of the front view, Figure 4 is a perspective view of the blade tip, and Figure 5 is A diagram showing the cutting state of the penetrating drill of the present invention, FIG. 6 is an enlarged view of the front tip of the two-blade penetrating drill of the present invention, FIG. 7 is a view of the tip of the same blade, and FIGS. 8 and 9 10 is a diagram showing another embodiment of the cutting edge line, FIG. 10 is a diagram showing a conventional two-blade penetrating drill, and FIG. 11 is a diagram showing its cutting state. 3... Conical part, 7... Side cutting edge line, 8... Cutting edge corner, 9... Convex arc tip cutting edge line, 10... Center cutting edge line, A... Most pointed point.
Claims (1)
通錐において、前記切刃部の一つの刃先線は外周
切刃コーナ部８からほぼ接線方向に凸円弧で形成
され、該凸円弧の刃先線９の最尖端点Ａが錐の回
転中心より手前僅かに離れて位置し、該最尖端点
Ａより後退側に延びる中心刃先線１０がほぼ錐の
回転中心を通るように形成されたことを特徴とす
る貫通錐。 (2) 刃先線が凸円弧に替え１回以上屈折した屈
折線である請求項１記載の貫通錐。 (3) 切刃部の刃先線を外周切刃コーナ部からほ
ぼ接線方向に凸円弧で形成し途中より最尖端点迄
を直線で形成した請求項１記載の貫通錐。 (4) 先端切刃部を有する二枚刃の貫通錐におい
て、前記切刃部の刃先線が外周切刃コーナ部から
尖端迄の間を凸円弧線又は１回以上屈折する屈折
線で形成されたことを特徴とする貫通錐。[Claims for Utility Model Registration] (1) In a single-flute or double-blade penetrating drill having a tip cutting edge, one cutting edge line of the cutting edge extends substantially tangentially from the outer cutting edge corner 8. It is formed by a convex arc, and the most apical point A of the cutting edge line 9 of the convex arc is located slightly away from the center of rotation of the drill bit, and the center cutting edge line 10 extending toward the rear side from the tip point A is approximately at the tip of the tip of the drill bit. A through-hole characterized by being formed so as to pass through the center of rotation. (2) The penetrating drill according to claim 1, wherein the cutting edge line is a refraction line bent at least once instead of a convex arc. (3) The penetrating drill according to claim 1, wherein the cutting edge line of the cutting edge portion is formed as a convex arc substantially tangentially from the outer cutting edge corner portion, and is formed as a straight line from the middle to the most apical point. (4) In a two-blade penetrating drill having a tip cutting edge, the cutting edge line of the cutting edge is formed by a convex arc line or a refraction line that is bent one or more times between the outer cutting edge corner and the tip. A penetrating drill characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989031035U JPH0721287Y2 (en) | 1989-03-17 | 1989-03-17 | Penetration cone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989031035U JPH0721287Y2 (en) | 1989-03-17 | 1989-03-17 | Penetration cone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02121902U true JPH02121902U (en) | 1990-10-04 |
| JPH0721287Y2 JPH0721287Y2 (en) | 1995-05-17 |
Family
ID=31256604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989031035U Expired - Lifetime JPH0721287Y2 (en) | 1989-03-17 | 1989-03-17 | Penetration cone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0721287Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS518699A (en) * | 1974-07-10 | 1976-01-23 | Yoshimasa Nagai | TOKOBASHIRATA TEANASENKOSOCHI |
-
1989
- 1989-03-17 JP JP1989031035U patent/JPH0721287Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS518699A (en) * | 1974-07-10 | 1976-01-23 | Yoshimasa Nagai | TOKOBASHIRATA TEANASENKOSOCHI |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0721287Y2 (en) | 1995-05-17 |
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