JPH0511934Y2 - - Google Patents
Info
- Publication number
- JPH0511934Y2 JPH0511934Y2 JP1985172434U JP17243485U JPH0511934Y2 JP H0511934 Y2 JPH0511934 Y2 JP H0511934Y2 JP 1985172434 U JP1985172434 U JP 1985172434U JP 17243485 U JP17243485 U JP 17243485U JP H0511934 Y2 JPH0511934 Y2 JP H0511934Y2
- Authority
- JP
- Japan
- Prior art keywords
- drill
- tap
- hole
- thread
- diameter
- 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.)
- Expired - Lifetime
Links
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
Landscapes
- Drilling Tools (AREA)
Description
【考案の詳細な説明】
〔考案の目的〕
（産業上の利用分野）
本考案はドリルタツプの改良に関するもので、
ボール盤などによるメクラ穴のタツプ加工に広く
利用されるものである。[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) The invention relates to the improvement of drill taps.
It is widely used for tapping blind holes using drilling machines, etc.
（従来の技術）
本考案に係る従来技術としては、ワンパス加工
用として第３図のＢに示すような貫通穴用のドリ
ルタツプがあり、１１はドリル、１２はタツプ
で、ドリル部の直径をaφ、タツプ部の直径をbφ、
そのピツチをP1とし、被削物を１３とすれば、
ネジ下穴となるaφのドリル部が穴あけを行つた
後に続いて切削条件すなわち、切削速度（回転
数）及び送り速度を変更してタツプ１２が、直径
bφ、ピツチＰのネジ立て行うものである。(Prior art) As a prior art related to the present invention, there is a drill tap for a through hole for one-pass machining as shown in FIG. , the diameter of the tap part is bφ,
If the pitch is P 1 and the workpiece is 13, then
After the drill part of aφ, which will be the pilot hole for the screw, drills the hole, the cutting conditions, that is, the cutting speed (number of revolutions) and feed rate are changed, and the tap 12 is adjusted to the diameter.
This is for tapping the screws with bφ and pitch P.
（考案が解決しようとする問題点）
然し前記ドリルタツプは貫通穴用として使用さ
れるもので、ドリル部の長さl2が長く、ドリル加
工時とタツプ加工時において切削条件を変更する
必要があり、更に第３図ハに示すように被削物１
４にメクラ穴１５をタツプ加工する場合には下穴
の長さがl1と短くかつ切削条件を変更することが
出来なく、更に排出される切粉の量が多いために
切粉ヅマリによりネジフランク面を傷つけ、工具
そのものが折損しやすいという問題点があつた。(Problems to be solved by the invention) However, the drill tap mentioned above is used for making through holes, and the length of the drill part is long, so it is necessary to change the cutting conditions when drilling and tapping. , furthermore, as shown in Fig. 3C, the workpiece 1
When tap-machining a blind hole 15 in 4, the length of the pilot hole is as short as l1 , cutting conditions cannot be changed, and the amount of chips discharged is large, resulting in screws being There were problems in that the flank surface was damaged and the tool itself was easily broken.
本考案はドリルタツプによりメクラ穴のタツプ
加工をワンパスで行う場合に切粉ヅマリがなく、
かつきれいなネジ山を形成できるドリルタツプを
提供することを目的とするものである。 This invention eliminates chips when tapping blind holes in one pass with a drill tap.
The object of the present invention is to provide a drill tap that can form a clean screw thread.
（問題点を解決するための手段）
上記技術的課題を解決するために講じた技術的
手段は、次のようである。すなわち、穴あけネジ
立てのメクラ穴用ドリルタツプにおいて
(1) タツプ部の切粉排出溝をドリル部から連続的
につなぎ一定角を有するスパイラル形状とし、
(2) 刃具先端の直径をタツプ部のネジの谷径より
大としてドリル部の刃付を行い、
(3) 刃具内部に給油穴を設けた、
構造のメクラ穴用ドリルタツプである。
(Means for solving the problems) The technical measures taken to solve the above technical problems are as follows. In other words, in the case of a drill tap for a blind hole for tapping a hole, (1) the chip discharge groove in the tap part is connected continuously from the drill part to form a spiral shape with a constant angle, and (2) the diameter of the tip of the tool is set to the diameter of the screw in the tap part. This drill tap for blind holes has a structure in which the drill part has a blade that is larger than the root diameter, and (3) an oil supply hole is provided inside the cutting tool.
（作用）
上記技術的手段は次のように作用する。すなわ
ち、タツプ部の切粉排出溝をドリル部から連続的
につなぎスパイラル形状にすることにより、切粉
の排出性が向上して、切粉ヅマリによるネジフラ
ンク面のムシレなどの傷が無くなり、また工具の
折損もなくなり、
次に刃具先端の直径をタツプ部のネジの谷径よ
り大としてドリル部の刃付を施すことによりネジ
形状を100％ネジ山にすることを防ぐと共にネジ
山頂点から始まる引きさきなどのネジ山の損傷が
無くなり、
次に刃具内部にシヤンク部より先端に給油穴を
設けて内部給油を行うことにより、切粉の排出性
が向上し、また切削性が良くなり、ネジフランク
面のムシレなどがなく、きれいなネジ山が形成さ
れるものである。(Operation) The above technical means operates as follows. In other words, by creating a spiral shape in which the chip evacuation groove of the tap part is connected continuously from the drill part, the evacuation of chips is improved, and scratches such as cracks on the screw flank surface caused by crushed chips are eliminated. There will be no breakage of the tool.Next, by making the diameter of the tip of the cutting tool larger than the root diameter of the thread in the tap part and applying a sharp edge to the drill part, the thread shape will be prevented from becoming 100% threaded, and the thread will start from the top of the thread. Damage to the threads due to pulling is eliminated.Next, by providing an oil supply hole inside the tool from the shank to the tip and performing internal oil supply, chip evacuation is improved, cutting performance is improved, and thread There are no cracks on the flank surface and a clean thread is formed.
（実施例） 以下具体的な実施例について説明する。(Example) Specific examples will be described below.
Ａは実施例のメクラ穴用ドリルタツプで、１は
ドリル部、２はタツプ部、３は給油穴でドリル部
１の直径aφ＝6.8は下穴ドリル径であり、長さl1
は５mmである。この５mmの間にタツプすなわちネ
ジ部（ネジ谷残り）はない。 A is a drill tap for blind holes in the example, 1 is the drill part, 2 is the tap part, 3 is the oil supply hole, the diameter aφ = 6.8 of the drill part 1 is the pilot hole drill diameter, and the length l 1
is 5mm. There is no tap or threaded part (screw root remaining) between this 5mm.
５はタツプ部の先端付近でドリル部との境界か
ら始まるタツプ部の喰付刃であり、またタツプ部
２には30〜45°のネジレ角度を有する切粉排出溝
６があり、ドリル部１から連続的につなげられて
いる。４は給油穴３のドリル先端部の穴を示した
もので給油穴３は刃具軸心部をシヤンク部７より
先端付近で軸心と直角方向の交叉穴につなげられ
ている。 Reference numeral 5 denotes a biting edge of the tap part starting from the boundary with the drill part near the tip of the tap part, and the tap part 2 has a chip discharge groove 6 having a helix angle of 30 to 45 degrees. are connected continuously. Reference numeral 4 indicates a hole at the tip of the drill of the oil supply hole 3, in which the shaft center of the cutting tool is connected from the shank portion 7 to an intersecting hole in the direction perpendicular to the shaft center near the tip.
次に前記構成においてその作用を述べれば、本
考案のドリルタツプはネジ下穴とネジ山を同時に
切削するものであるが、刃具に回転と軸方向に送
りが与えられ、送りはネジ山のピツチ1.25mmの場
合は回転数が500〜600r.p.mが最適であり、ドリ
ル部の先端角度θ＝120°の切刃にあり、与えられ
た送りにより切込んで下穴を形成するとともに、
その下穴部分にネジ山が切削されるものである。 Next, to explain its function in the above configuration, the drill tap of the present invention cuts the screw pilot hole and the thread at the same time, but the cutting tool is given rotation and feed in the axial direction, and the feed is adjusted to the thread pitch of 1.25. In the case of mm, the optimum rotational speed is 500 to 600 r.pm, the cutting edge is at the tip angle θ = 120° of the drill part, and the drill part is cut with the given feed to form a pilot hole.
A screw thread is cut into the pilot hole.
ドリル部からの切粉と同時にネジ山形成時の切
粉もスパイラル溝に沿い被削物外部に排出され
る。所定の深さまで刃具が送られた後に、それま
での回転方向と反対に回転し刃具が戻され、ネジ
立てが完了するものである。 At the same time as chips from the drill part, chips from thread formation are also discharged to the outside of the workpiece along the spiral groove. After the cutting tool has been fed to a predetermined depth, the cutting tool is rotated in the opposite direction to the rotation direction until then, and the cutting tool is returned to complete the tapping.
本考案は次の特有の効果を有する。すなわち、
スパイラルタツプの先端を下穴ドリル径に砥ぎ直
してドリル部とするドリルタツプもあるが、この
ものはネジ穴が深くなるにつれて外部からの給油
がドリル部刃先からタツプ部にかけて充分に供給
できなくなり、切削性が悪くなりネジ山頂点から
のネジ山の引きさき、あるいはネジフランク面の
ムシレにつながり易いが、本考案は刃具内部に給
油穴を設け内部給油を行うものであり、ネジ穴が
深くなつても、切削性が良くネジフランク面のム
シレなどのキズがなく、きれいなネジ山が形成で
き、更に内部給油は刃先に潤滑、冷却効果も与え
ることにより刃具寿命を大幅に向上させるもので
ある。
The present invention has the following unique effects. That is,
There is also a drill tap that uses the tip of the spiral tap as a drill part by re-sharpening it to the diameter of the prepared hole drill, but with this type, as the screw hole gets deeper, it becomes impossible to supply sufficient oil from the outside from the tip of the drill part to the tap part. However, the present invention provides a lubricating hole inside the cutting tool and performs internal lubricating, and the screw hole is deep. Even after cutting, it has good cutting performance and there are no scratches such as cracks on the screw flank surface, allowing for the formation of clean threads.Furthermore, the internal oil supply provides lubrication and cooling effects to the cutting edge, greatly extending the life of the cutting tool. .
第１図は本実施例の一部破断した外観側面図で
あり、第２図は本実施例のタツプ先端部の拡大図
であり、第３図は従来例で、イは外観側面図であ
り、ロは貫通穴用の工程断面図であり、ハはメク
ラ穴用の工程断面図である。
Ａ……メクラ穴用ドリルタイプ、１……ドリ
ル、２……タツプ、３，４……油穴、６……スパ
イラル形状の切粉溝。
Fig. 1 is a partially broken external side view of this embodiment, Fig. 2 is an enlarged view of the tap tip of this embodiment, Fig. 3 is a conventional example, and A is an external side view. , B are process cross-sectional views for through holes, and C are process cross-sectional views for blind holes. A...Drill type for blank holes, 1...Drill, 2...Tap, 3, 4...Oil hole, 6...Spiral shaped chip groove.
Claims (1)
ツプにおいて、タツプ部の切粉排出溝をドリル部
から連続的につなぎ一定角度を有するスパイラル
形状とし、前記ドリル先端の直径をタツプ部のネ
ジの谷径より大としてドリル部の刃付を行い、ド
リルタツプ内部に給油穴を設けたメクラ穴用ドル
リタツプ。 In a drill tap for blind holes in which the drill and the tap are integrated, the chip discharge groove of the tap part is connected continuously from the drill part to form a spiral shape having a certain angle, and the diameter of the drill tip is set to be smaller than the root diameter of the thread of the tap part. Drill tap for blind holes with a large drill part and a lubricating hole inside the drill tap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985172434U JPH0511934Y2 (en) | 1985-11-08 | 1985-11-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985172434U JPH0511934Y2 (en) | 1985-11-08 | 1985-11-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6281526U JPS6281526U (en) | 1987-05-25 |
| JPH0511934Y2 true JPH0511934Y2 (en) | 1993-03-25 |
Family
ID=31108964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985172434U Expired - Lifetime JPH0511934Y2 (en) | 1985-11-08 | 1985-11-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0511934Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10100020A (en) * | 1996-09-30 | 1998-04-21 | Mitsubishi Materials Corp | Tap with drill |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5558920A (en) * | 1978-10-20 | 1980-05-02 | Honda Motor Co Ltd | Reamer section tap |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5357397U (en) * | 1976-10-19 | 1978-05-16 |
-
1985
- 1985-11-08 JP JP1985172434U patent/JPH0511934Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5558920A (en) * | 1978-10-20 | 1980-05-02 | Honda Motor Co Ltd | Reamer section tap |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6281526U (en) | 1987-05-25 |
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