JPS6370814U - - Google Patents
Info
- Publication number
- JPS6370814U JPS6370814U JP16334486U JP16334486U JPS6370814U JP S6370814 U JPS6370814 U JP S6370814U JP 16334486 U JP16334486 U JP 16334486U JP 16334486 U JP16334486 U JP 16334486U JP S6370814 U JPS6370814 U JP S6370814U
- Authority
- JP
- Japan
- Prior art keywords
- back taper
- outer diameter
- less
- grinding area
- 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Drilling Tools (AREA)
Description
第１図は本考案に係るドリルの一実施例を示す
側面図であり、第２図は第１図のドリルの外径バ
ツクテーパ形状を明確にすべくその特徴を誇張し
て表した模式図、第３図は第１図の―線矢視
断面図、第４図は本実施例のドリルの切刃形状を
示す端面図、第５図は刃部先端の軸方向断面形状
を示す要部拡大断面図、第６図は第５図の―
線矢視断面図、第７図は本実施例におけるドリル
の切刃の端面形状の詳細を説明する説明図、第８
図は本実施例のドリルと従来技術によるドリルと
をそれぞれ５本ずつ用いて寿命テストを行なつた
結果を示すグラフ図、第９図は外径バツクテーパ
と加工穴の拡大代および夫々のサンプル群の平均
値寿命との関係を示すグラフ図である。
２……刃部、３……再研削領域の部分、６……
再研削領域より後方の部分。
FIG. 1 is a side view showing an embodiment of the drill according to the present invention, and FIG. 2 is a schematic diagram exaggerating the characteristics of the back taper shape of the outside diameter of the drill shown in FIG. Fig. 3 is a cross-sectional view taken along the - line in Fig. 1, Fig. 4 is an end view showing the cutting edge shape of the drill of this example, and Fig. 5 is an enlarged view of the main part showing the axial cross-sectional shape of the tip of the blade. Cross-sectional view, Figure 6 is the same as Figure 5.
7 is a cross-sectional view taken along the line, and FIG.
The figure is a graph showing the results of a life test using five drills of this embodiment and five drills of the conventional technology. Figure 9 shows the back taper of the outside diameter, the enlargement of the machined hole, and each sample group. FIG. 2...Blade part, 3...Re-grinding area part, 6...
The part behind the regrinding area.
Claims (1)
に０．１／１００以上０．４／１００以下の外径
バツクテーパを付し、該再研削領域より後方の部
分６に０以上０．１／１００以下の外径バツクテ
ーパを付したことを特徴とするドリル。 Part 3 of the re-grinding area located on the tip side of the blade part 2
is provided with an outer diameter back taper of 0.1/100 or more and 0.4/100 or less, and an outer diameter back taper of 0 or more and 0.1/100 or less is provided on the rear part 6 of the re-grinding area. Drill to do.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16334486U JPS6370814U (en) | 1986-10-23 | 1986-10-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16334486U JPS6370814U (en) | 1986-10-23 | 1986-10-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6370814U true JPS6370814U (en) | 1988-05-12 |
Family
ID=31091454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16334486U Pending JPS6370814U (en) | 1986-10-23 | 1986-10-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6370814U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5555924U (en) * | 1978-10-11 | 1980-04-16 |
-
1986
- 1986-10-23 JP JP16334486U patent/JPS6370814U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5555924U (en) * | 1978-10-11 | 1980-04-16 |