JPS61205716U - - Google Patents
Info
- Publication number
- JPS61205716U JPS61205716U JP6537386U JP6537386U JPS61205716U JP S61205716 U JPS61205716 U JP S61205716U JP 6537386 U JP6537386 U JP 6537386U JP 6537386 U JP6537386 U JP 6537386U JP S61205716 U JPS61205716 U JP S61205716U
- Authority
- JP
- Japan
- Prior art keywords
- cutting edge
- land
- edge
- gun drill
- recessed portion
- 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
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Drilling Tools (AREA)
Description
第１図は、本考案ガンドリルの一実施例を示す
正面図、第２図は、切刃チツプを拡大して示す要
部の正面図、第３図は、要部の拡大側面図、第４
図は、本考案ガンドリルにおける切屑の発生状況
を概念的に示す斜視図、第５図は、本考案品およ
び従来品における切削性能を示す説明図、第６図
は、凹み部分１０の数値的適用範囲を概念的に示
す説明図、第７図は、数値限定の根拠となる切屑
形状を示す説明図である。
１……パイプ本体、３……切刃チツプ、７……
すくい面、８……外周切刃稜、９……ランド、１
０……凹み部分。
Fig. 1 is a front view showing one embodiment of the gun drill of the present invention, Fig. 2 is a front view of the main part showing an enlarged cutting tip, Fig. 3 is an enlarged side view of the main part, and Fig. 4 is an enlarged side view of the main part.
The figure is a perspective view conceptually showing the state of chip generation in the gun drill of the present invention, FIG. 5 is an explanatory diagram showing the cutting performance of the product of the present invention and the conventional product, and FIG. FIG. 7, which is an explanatory diagram conceptually showing the range, is an explanatory diagram showing the chip shape that is the basis for numerical limitation. 1... Pipe body, 3... Cutting blade tip, 7...
Rake face, 8...Outer cutting edge ridge, 9...Land, 1
0...Concave part.
Claims (1)
超硬合金からなる切刃チツプ３が固定されること
により、正面切刃稜５および外周切刃稜８が形成
され、また、その後端には、柄部４が設けられる
ようにしたガンドリルにおいて、 前記切刃チツプ３のすくい面７には、外周切刃
稜８からランド９を介して円弧型の凹み部分１０
が形成され、これに伴ない正面切刃稜５には、ラ
ンド９による直線稜、凹み部分１０による凹曲稜
、残りのすくい面７による直線稜がそれぞれ形成
されるとともに、前記凹み部分１０は、横断面方
向でランド９側から深さを増すような傾斜面１０
ａを形成して、この傾斜面１０ａからすくい面７
に仕切上るようになつており、しかもその巾Ｗが
Ｗ＝（０．０８〜０．３）Ｄの範囲内で設定され
ていることを特徴とするガンドリル。[Claims for Utility Model Registration] At the tip of the pipe body 1 equipped with the flute 2,
A gun drill in which a cutting edge 3 made of cemented carbide is fixed to form a front cutting edge 5 and an outer cutting edge 8, and a handle 4 is provided at the rear end, The rake face 7 of the cutting blade tip 3 has an arc-shaped concave portion 10 extending from the outer peripheral cutting edge ridge 8 through the land 9.
As a result, the front cutting edge 5 is formed with a straight edge due to the land 9, a concave curved edge due to the recessed portion 10, and a straight edge due to the remaining rake surface 7, and the recessed portion 10 is , an inclined surface 10 whose depth increases from the land 9 side in the cross-sectional direction
a from this inclined surface 10a to the rake surface 7.
A gun drill having a width W set within a range of W=(0.08 to 0.3)D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6537386U JPS6228327Y2 (en) | 1986-04-30 | 1986-04-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6537386U JPS6228327Y2 (en) | 1986-04-30 | 1986-04-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61205716U true JPS61205716U (en) | 1986-12-25 |
| JPS6228327Y2 JPS6228327Y2 (en) | 1987-07-21 |
Family
ID=30597314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6537386U Expired JPS6228327Y2 (en) | 1986-04-30 | 1986-04-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6228327Y2 (en) |
-
1986
- 1986-04-30 JP JP6537386U patent/JPS6228327Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6228327Y2 (en) | 1987-07-21 |