JPS6420211U - - Google Patents
Info
- Publication number
- JPS6420211U JPS6420211U JP11191487U JP11191487U JPS6420211U JP S6420211 U JPS6420211 U JP S6420211U JP 11191487 U JP11191487 U JP 11191487U JP 11191487 U JP11191487 U JP 11191487U JP S6420211 U JPS6420211 U JP S6420211U
- Authority
- JP
- Japan
- Prior art keywords
- drill
- diameter portion
- drill body
- groove
- twisted
- 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
Description
第１図Ａは本考案の一実施例に係る複溝段付き
ドリルを示す軸直角断面図、第１図Ｂは再研削終
了状態を示す同図Ａに相当する断面図、第２図Ａ
，Ｂはそれぞれ本考案の他の実施例に係る複溝段
付きドリルを示す断面図、第３図Ａ，Ｂ更に他の
実施例に係る複溝段付きドリルを示す断面図、第
４図Ａは複溝段付きドリルの一般例と、これによ
り加工される被加工物を示す断面図、第４図Ｂ，
Ｃはそれぞれ従来の複溝段付きドリルを示す断面
図、第５図Ａは一般のドリルを示す正面図、第５
図Ｂは同図Ａの底面図である。
１……ドリル本体、２……捩れ溝、３ａ，３ｂ
……ランド部、４ａ，４ｂ……エツジ部、５ａ，
５ｂ……切刃、６……逃げ面、７……捩れ面、１
０……小径部、１１……段付き部、１２……大径
部、２０……交点、Ｄａ……小径部の直径、Ｄｂ
……大径部の直径。
FIG. 1A is a cross-sectional view at right angles to the axis showing a multi-groove stepped drill according to an embodiment of the present invention, FIG. 1B is a cross-sectional view corresponding to FIG.
, B are sectional views showing a multi-groove stepped drill according to other embodiments of the present invention, FIGS. 3A and 3A, B are sectional views showing a multi-groove stepped drill according to another embodiment of the present invention, and FIG. 4A Figure 4B is a cross-sectional view showing a general example of a multi-groove step drill and the workpiece machined by the drill.
C is a sectional view showing a conventional multi-fluted stepped drill, FIG. 5A is a front view showing a general drill, and FIG.
Figure B is a bottom view of Figure A. 1... Drill body, 2... Twisted groove, 3a, 3b
...Land part, 4a, 4b...Edge part, 5a,
5b... Cutting edge, 6... Relief surface, 7... Twisted surface, 1
0... Small diameter part, 11... Stepped part, 12... Large diameter part, 20... Intersection, Da... Diameter of small diameter part, Db
...The diameter of the large diameter part.
Claims (1)
捩れた捩れ溝を設け、当該捩れ溝により形成され
る切刃にエツジを介して連続したランド部を有し
、前記ランド部により定まるドリル直径が大径と
なる大径部と、当該大径部よりも直径が小さい小
径部と、これらを結ぶ段付き部とを前記ドリル本
体に形成し、前記ドリル本体の軸直角断面におけ
る前記大径部の逃げ面と、前記捩れ溝により形成
される前記小径部における捩れ面との交点を、前
記小径部の直径よりも中心側に位置させてなる複
溝端付きドリル。 A drill body is provided with a twisted groove that is twisted along the axial direction of the drill body, and a cutting edge formed by the twisted groove has a land portion that is continuous via an edge, and the drill diameter determined by the land portion is large. A large diameter portion having a diameter smaller than the large diameter portion, and a stepped portion connecting these are formed in the drill body, and a relief of the large diameter portion in a cross section perpendicular to the axis of the drill body is formed. A drill with a double flute end, wherein an intersection point between a surface and a torsion surface in the small diameter portion formed by the torsion groove is located closer to the center than the diameter of the small diameter portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11191487U JPH0536564Y2 (en) | 1987-07-23 | 1987-07-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11191487U JPH0536564Y2 (en) | 1987-07-23 | 1987-07-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6420211U true JPS6420211U (en) | 1989-02-01 |
| JPH0536564Y2 JPH0536564Y2 (en) | 1993-09-16 |
Family
ID=31350382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11191487U Expired - Lifetime JPH0536564Y2 (en) | 1987-07-23 | 1987-07-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0536564Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6450007U (en) * | 1987-09-18 | 1989-03-28 |
-
1987
- 1987-07-23 JP JP11191487U patent/JPH0536564Y2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6450007U (en) * | 1987-09-18 | 1989-03-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0536564Y2 (en) | 1993-09-16 |