JPH0460606U - - Google Patents
Info
- Publication number
- JPH0460606U JPH0460606U JP10165790U JP10165790U JPH0460606U JP H0460606 U JPH0460606 U JP H0460606U JP 10165790 U JP10165790 U JP 10165790U JP 10165790 U JP10165790 U JP 10165790U JP H0460606 U JPH0460606 U JP H0460606U
- Authority
- JP
- Japan
- Prior art keywords
- tip
- rear end
- wall surface
- discharge groove
- chip discharge
- 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
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Drilling Tools (AREA)
Description
第１図ないし第４図は本考案の一実施例を示す
もので、第１図はドリルの側面図、第２図は第１
図に方向からの矢視図、第３図は第１図の−
線における断面図、第４図は第１図の−線
における断面図、第５図は上記実施例の変形を示
す断面図、第６図は他の変形例を示す断面図、第
７図は本考案と比較例との切削試験の結果を示す
図、そして第８図は従来例を示す断面図である。
１０……ドリル、１１……工具本体、１２……
切屑排出溝、１３……切屑排出溝の壁面、１４…
…切刃チツプ、１４ａ……すくい面、１５……切
刃、１７……ヒール側壁面、１８……凸部、１９
……ヒール、２０……頂上部、２１……凹曲面、
ＰＯ……工具回転中心。
Figures 1 to 4 show one embodiment of the present invention, with Figure 1 being a side view of the drill, and Figure 2 being a side view of the drill.
The figure is a view from the direction of the arrow, and Figure 3 is the − of Figure 1.
4 is a sectional view taken along the - line in FIG. 1, FIG. 5 is a sectional view showing a modification of the above embodiment, FIG. 6 is a sectional view showing another modification, and FIG. A diagram showing the results of cutting tests of the present invention and a comparative example, and FIG. 8 is a cross-sectional view of the conventional example. 10...Drill, 11...Tool body, 12...
Chip discharge groove, 13...Wall surface of chip discharge groove, 14...
...Cutting blade tip, 14a... Rake surface, 15... Cutting blade, 17... Heel side wall surface, 18... Convex portion, 19
... Heel, 20 ... Top part, 21 ... Concave curved surface,
PO...Center of tool rotation.
Claims (1)
後端側へ向かつて延びる切屑排出溝が形成され、
この切屑排出溝の壁面の先端と工具先端面との稜
線部に切刃が設けられてなるドリルにおいて、 上記切屑排出溝のヒール側壁面の先端部に、工
具回転中心からヒール側へ工具径Ｄに対して０．
３Ｄ〜０．４５Ｄ離間した位置に頂上部を有する
凸部を形成し、この凸部の内周側端部から上記頂
上部に至る面を上記ヒール側壁面よりも大きな曲
率で湾曲する凹曲面に形成し、さらに上記切屑排
出溝の溝幅を先端から後端まで一定に設定したこ
とを特徴とするドリル。 (2) 請求項１記載のドリルにおいて、上記凸部
の後端位置を、上記切刃の先端から工具軸方向後
端側へ０．５Ｄ〜２Ｄ離間した位置に設定すると
ともに、工具本体の芯厚を０．２５Ｄ〜０．３５
Ｄに、溝幅比を０．６〜１．２：１の範囲に設定
したことを特徴とするドリル。 (3) 上記凸部の少なくとも後端側の上記ヒール
側壁面からの突出量を工具軸方向後端側へ向かう
に従つて漸次減少させることにより、上記凸部の
後端を上記ヒール側壁面と滑らかに連続させたこ
とを特徴とする請求項１または請求項２記載のド
リル。 (4) 上記切屑排出溝の壁面の先端を、当該切屑
排出溝にろう付け接合される切刃チツプのすくい
面によつて構成し、この切刃チツプのすくい面と
逃げ面との稜線部に上記切刃を形成したことを特
徴とする請求項１ないし請求項３のいずれかに記
載のドリル。[Claims for Utility Model Registration] (1) A chip discharge groove is formed on the outer periphery of the tool body and extends from the tip of the tool body toward the rear end,
In a drill in which a cutting edge is provided at the ridgeline between the tip of the wall surface of the chip discharge groove and the tool tip surface, a tool diameter D is provided at the tip of the heel side wall surface of the chip discharge groove from the tool rotation center to the heel side. 0.
A convex portion having an apex at a position spaced apart by 3D to 0.45D is formed, and a surface extending from the inner circumferential end of the convex portion to the apex portion is a concave curved surface having a larger curvature than the heel side wall surface. and further characterized in that the width of the chip discharge groove is set constant from the tip to the rear end. (2) In the drill according to claim 1, the rear end position of the convex portion is set at a position spaced from the tip of the cutting blade by 0.5D to 2D toward the rear end side in the tool axis direction, and the center of the tool body is Thickness 0.25D~0.35
D. A drill characterized in that the groove width ratio is set in a range of 0.6 to 1.2:1. (3) By gradually decreasing the amount of protrusion of at least the rear end of the convex portion from the heel side wall surface toward the rear end in the tool axis direction, the rear end of the convex portion is brought into contact with the heel side wall surface. The drill according to claim 1 or 2, characterized in that the drill is smoothly continuous. (4) The tip of the wall surface of the chip discharge groove is formed by the rake face of the cutting chip that is brazed to the chip discharge groove, and the ridge line between the rake face and the flank face of the cutting chip is The drill according to any one of claims 1 to 3, characterized in that the cutting edge is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990101657U JP2535644Y2 (en) | 1990-09-28 | 1990-09-28 | Drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990101657U JP2535644Y2 (en) | 1990-09-28 | 1990-09-28 | Drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0460606U true JPH0460606U (en) | 1992-05-25 |
| JP2535644Y2 JP2535644Y2 (en) | 1997-05-14 |
Family
ID=31845313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990101657U Expired - Lifetime JP2535644Y2 (en) | 1990-09-28 | 1990-09-28 | Drill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2535644Y2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001341015A (en) * | 2000-03-31 | 2001-12-11 | Hitachi Tool Engineering Ltd | Twist drill for cutting stainless steel |
| JP2006312238A (en) * | 2006-07-05 | 2006-11-16 | Tungaloy Corp | Throw away type drill |
| WO2018221303A1 (en) * | 2017-05-29 | 2018-12-06 | 京セラ株式会社 | Drill and method for manufacturing cutting workpiece |
| JPWO2018180775A1 (en) * | 2017-03-30 | 2020-01-09 | 京セラ株式会社 | Rotary tool |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS634211U (en) * | 1986-06-23 | 1988-01-12 |
-
1990
- 1990-09-28 JP JP1990101657U patent/JP2535644Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS634211U (en) * | 1986-06-23 | 1988-01-12 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001341015A (en) * | 2000-03-31 | 2001-12-11 | Hitachi Tool Engineering Ltd | Twist drill for cutting stainless steel |
| JP2006312238A (en) * | 2006-07-05 | 2006-11-16 | Tungaloy Corp | Throw away type drill |
| JPWO2018180775A1 (en) * | 2017-03-30 | 2020-01-09 | 京セラ株式会社 | Rotary tool |
| US11458552B2 (en) | 2017-03-30 | 2022-10-04 | Kyocera Corporation | Rotating tool |
| WO2018221303A1 (en) * | 2017-05-29 | 2018-12-06 | 京セラ株式会社 | Drill and method for manufacturing cutting workpiece |
| JPWO2018221303A1 (en) * | 2017-05-29 | 2020-03-26 | 京セラ株式会社 | Manufacturing method of drill and cut workpiece |
| US11872641B2 (en) | 2017-05-29 | 2024-01-16 | Kyocera Corporation | Drill and method for manufacturing machined product |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2535644Y2 (en) | 1997-05-14 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |