JP2003136334A - Cutting and rolling composite tap - Google Patents
Cutting and rolling composite tapInfo
- Publication number
- JP2003136334A JP2003136334A JP2001328964A JP2001328964A JP2003136334A JP 2003136334 A JP2003136334 A JP 2003136334A JP 2001328964 A JP2001328964 A JP 2001328964A JP 2001328964 A JP2001328964 A JP 2001328964A JP 2003136334 A JP2003136334 A JP 2003136334A
- Authority
- JP
- Japan
- Prior art keywords
- tap
- cutting
- blade
- rolling
- chips
- 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
Landscapes
- Drilling Tools (AREA)
- Milling Processes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、切削刃と転造刃を
効果的に配設してなる切削・転造複合タップに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combined cutting / rolling tap in which a cutting blade and a rolling blade are effectively arranged.
【０００２】[0002]
【従来の技術と発明が解決しようとする課題】従来か
ら、切削タップは、そのワークの材質によっては、食い
付き部の切れ刃に欠け（タップの折損）が発生すること
から、普及が遅れている。2. Description of the Related Art Conventionally, a cutting tap has a delay in its widespread use because a cutting edge of a biting part is chipped (a breakage of the tap) depending on the material of the work. There is.
【０００３】例えば図５に示すように、切削タップの正
転切削時には、食い付き部の切れ刃（切削刃）100 で切
削されたワーク（下穴）101 の切り屑102 は切れ刃100
のすくい面103 でカールし、その一部は溝（切粉溜溝）
104 に溜まり外部に排出される（図５の（ａ）参照）。
そして、所定のめねじ加工（タッピング）が終わると、
切削タップは逆転に入るが、この逆転開始時には、切り
屑102 の一部は未だワーク101 に付いている（図５の
（ｂ）参照）。この後、切り終わりの切り屑102は刃裏
側で切断されるが切断根が残り、この切断根が二番面
（逃げ面）105 にそのまま入り込むと、二番面105 側か
ら切れ刃100 がたたかれ、その衝撃で切れ刃100 に欠け
が発生する（図５の（ｃ）参照）。For example, as shown in FIG. 5, during normal rotation cutting of a cutting tap, chips 102 of a workpiece (prepared hole) 101 cut by a cutting edge (cutting edge) 100 at a biting portion are cutting edges 100.
It curls at the rake face 103 and part of it is a groove (chip collecting groove)
It is collected in 104 and discharged to the outside (see FIG. 5A).
And when the predetermined female thread processing (tapping) is completed,
The cutting tap enters reverse rotation, but at the start of this reverse rotation, part of the chips 102 still attaches to the work 101 (see FIG. 5B). After this, the chips 102 at the end of cutting are cut on the back side of the blade, but the cutting root remains, and when this cutting root enters the No. 2 surface (flank surface) 105 as it is, the cutting edge 100 is struck from the No. 2 surface 105 side. The impact causes the chipping of the cutting edge 100 (see (c) of FIG. 5).
【０００４】この現象は、靱性値の小さい超硬製タップ
では、鉄系ワーク全般で顕著であることから、主に、ア
ルミニウムやその合金、鋳物等にワークの材質が限られ
ている。また、靱性の高い高速度工具鋼製タップでも、
粘ば固いワーク材質で発生している。このような実情か
ら、切削タップの普及が遅れているのである。In a cemented carbide tap having a small toughness value, this phenomenon is remarkable in iron-based workpieces in general, so that the material of the workpiece is mainly limited to aluminum, its alloys, castings and the like. In addition, even for taps made of high-speed tool steel with high toughness,
It is caused by a sticky work material. Due to such circumstances, the spread of cutting taps has been delayed.
【０００５】また、タップの折損現象は、前記タッピン
グ時の切り屑がタップの谷底とワークの下穴内壁の隙間
に入り込み、所謂楔を打ち込んだ状態になってクラック
が入り、折損に至るケースも多い。In addition, as for the breakage phenomenon of the tap, the chips at the time of tapping enter the gap between the root of the tap and the inner wall of the prepared hole of the work, and a state where a so-called wedge is hammered in and cracks occur, leading to breakage. Many.
【０００６】加えて、切削タップはテーパタップで、ワ
ーク下穴にテーパねじを加工する場合には、溝数に対応
した断続的な渦巻き加工となって、ワーク下穴の仕上面
にストップマーク（カットマーク）が発生し、これによ
り雄ねじが緩みやすいと共にガス等の流体漏れが生じる
という欠点もあった。[0006] In addition, the cutting tap is a taper tap, and when a taper screw is machined in the prepared hole of the work, it becomes an intermittent spiral machining corresponding to the number of grooves, and a stop mark (cut) is formed on the finished surface of the prepared hole of the work. (Mark) is generated, which causes the male screw to be easily loosened and causes fluid leakage such as gas.
【０００７】本発明は上記状況に鑑みてなされたもの
で、切削刃と転造刃を効果的に配設することにより、タ
ップの折損を未然に回避できると共に仕上面の精度も向
上させられる切削・転造複合タップを提供することを目
的とする。The present invention has been made in view of the above situation. By effectively disposing a cutting blade and a rolling blade, breakage of a tap can be avoided in advance and the precision of the finished surface can be improved. -The purpose is to provide a rolled composite tap.
【０００８】[0008]
【課題を解決するための手段】上記目的を解決するため
の本発明に係る切削・転造複合タップは、タップねじ部
の外周に周方向へ溝部を挾んで切削刃と転造刃を交互に
配設してなることを特徴とする。SUMMARY OF THE INVENTION A cutting / rolling composite tap according to the present invention for solving the above-mentioned object has a groove formed circumferentially in the outer periphery of a tap screw portion to alternate a cutting blade and a rolling blade. It is characterized by being arranged.
【０００９】また、前記切削刃のすくい面にチップブレ
ーカーを付設したことを特徴とする。Further, a chip breaker is attached to the rake face of the cutting blade.
【００１０】また、前記タップねじ部の谷径を浅くし、
ワーク下穴との隙間を小さく設定したことを特徴とす
る。Further, the root diameter of the tap screw portion is made shallow,
The feature is that the gap with the work hole is set small.
【００１１】また、前記タップはワーク下穴にテーパね
じを加工するテーパタップであることを特徴とする。Further, the tap is a taper tap for machining a taper screw in a prepared hole of a work.
【００１２】[0012]
【発明の実施の形態】以下、本発明に係る切削・転造複
合タップを実施例により図面を用いて詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION The cutting / rolling composite tap according to the present invention will be described in detail below with reference to the accompanying drawings.
【００１３】［実施例］図１は本発明の一実施例に係る
超硬タップの構成図で、同図（ａ）は側面図、同図
（ｂ）は正面図、同図（ｃ）は同図（ｂ）の拡大図、図
２は同じく図１（ｃ）の要部拡大図、図３は同じくタッ
プ谷径の説明図、図４は同じく作用説明図である。[Embodiment] FIG. 1 is a block diagram of a cemented carbide tap according to an embodiment of the present invention. FIG. 1 (a) is a side view, FIG. 1 (b) is a front view, and FIG. 2B is an enlarged view of FIG. 1B, FIG. 2 is an enlarged view of a main part of FIG. 1C, FIG. 3 is an explanatory view of a tap root diameter, and FIG.
【００１４】図１（ａ）に示すように、超硬タップ１は
図示しないワークの下穴にねじ切り（タッピング）を施
すためのねじ部２と基軸であるシャンク部３とからなる
と共に、シャンク部３の後端部には図示しないスピンド
ルに回り止めされて係合するための四角部４が形成され
る。As shown in FIG. 1 (a), a cemented carbide tap 1 comprises a screw portion 2 for tapping a prepared hole (not shown) of a workpiece and a shank portion 3 which is a base shaft, and a shank portion. A square portion 4 is formed at a rear end portion of the shaft 3 so as to be engaged with a spindle (not shown) so as to be prevented from rotating.
【００１５】そして、図１（ｂ）, （ｃ）に示すよう
に、前記ねじ部２の外周には、周方向に切粉排出用と切
削油剤（冷却・潤滑油剤）供給用を兼ねた溝５を挾んで
切削刃６と転造刃７が交互に配設（形成）されている。
図示例では、それぞれ点対称位置に２個宛配設（形成）
されている。As shown in FIGS. 1 (b) and 1 (c), on the outer periphery of the threaded portion 2, a groove is provided for both discharging chips in the circumferential direction and supplying cutting oil (cooling / lubricant). The cutting blades 6 and the rolling blades 7 are alternately arranged (formed) with the cutting blade 5 interposed therebetween.
In the illustrated example, two pieces are arranged (formed) at point symmetric positions.
Has been done.
【００１６】また、図２に示すように、前記切削刃６の
すくい面にチップブレーカー８が付設（形成）されて、
ワーク（下穴）Ｗの切り屑Ｗａを小さくカールさせて細
断し得るようになっている。Further, as shown in FIG. 2, a chip breaker 8 is attached (formed) to the rake face of the cutting blade 6,
The chips Wa of the work (prepared hole) W can be curled small and shredded.
【００１７】更に、図３に示すように、前記ねじ部２の
谷径Ｌ1 を従来の谷径Ｌ2 よりも浅くし、ワークＷ（下
穴最小径Ｄ参照）との隙間Ｃ1 を従来の隙間Ｃ2 よりも
小さく設定して、谷幅を大きくしてＶノッチを緩和する
ことで、タッピング時の切り屑Ｗａが前記隙間Ｃ2 に入
り込み、所謂楔を打ち込んだ状態になってクラックが入
り、折損（刃欠け）に至るケースを回避し得るようにな
っている。Further, as shown in FIG. 3, the valley diameter L 1 of the threaded portion 2 is made shallower than the conventional valley diameter L 2, and the gap C 1 with the work W (see the prepared hole minimum diameter D) is conventionally formed. By setting the gap smaller than the clearance C 2 and increasing the valley width to relax the V notch, the chips Wa at the time of tapping enter the clearance C 2 , so that a so-called wedge is driven and cracks occur. It is possible to avoid the case of entering and breaking (blade chipping).
【００１８】このように構成されるため、次に、本発明
の作用を図４に基づいて説明する。先ず、図４の（ａ）
の超硬タップの正転加工時には、ワークＷに対し切削刃
６と転造刃７とで交互にタッピングすることになるが、
切削刃６のみ切り屑Ｗａを出す。これにより、切り屑量
が従来の切削タップ（図５参照）より少なくなる利点が
ある。また、この際、チップブレーカー８により切り屑
Ｗａが細断され、切り屑Ｗａの排出性が高まることは前
述したとおりである。With the above construction, the operation of the present invention will be described with reference to FIG. First, FIG. 4 (a)
At the time of normal rotation machining of the carbide tap, the cutting blade 6 and the rolling blade 7 are alternately tapped with respect to the work W.
Only the cutting blade 6 produces chips Wa. This has an advantage that the amount of chips is smaller than that of the conventional cutting tap (see FIG. 5). Further, at this time, the chips Wa are shredded by the chip breaker 8 to enhance the discharge property of the chips Wa, as described above.
【００１９】次に、所定のタッピングが終わると、超硬
タップは、図４の（ｂ）に示すように、逆転に入るが、
この逆転開始時には、切り屑Ｗａの一部は未だワークＷ
に付いている。この後、図４の（ｃ）に示すように、切
り終わりの切り屑Ｗａは切削刃６の刃裏側で切断される
が切断根が残り、この切断根が転造刃７で塑性加工され
る。これにより、切断根による切削刃６の刃欠けが未然
に回避される。Next, when the predetermined tapping is completed, the cemented carbide tap enters reverse rotation as shown in FIG.
At the start of this reverse rotation, part of the chips Wa is still the work W.
Attached to. After this, as shown in FIG. 4C, the cutting waste Wa at the end of cutting is cut on the back side of the cutting blade 6, but a cutting root remains, and this cutting root is plastically processed by the rolling blade 7. . As a result, chipping of the cutting blade 6 due to the cutting root is avoided in advance.
【００２０】また、本実施例の超硬タップを、テーパタ
ップとし、ワーク下穴にテーパねじを加工する場合に
は、切削タップで必然的に発生していたストップマーク
（カットマーク）が前記転造刃７による塑性加工で消さ
れるので、雄ねじが緩みやすくなったり、ガス等の流体
漏れが生じるということが、未然に回避される。When the carbide tap of this embodiment is a taper tap and a taper screw is machined in the prepared hole of the workpiece, the stop mark (cut mark) which is inevitably generated in the cutting tap is rolled as described above. Since it is erased by the plastic working by the blade 7, it is possible to prevent the male screw from easily loosening and the fluid leakage such as gas from occurring.
【００２１】尚、本発明は上記実施例に限定されず、本
発明の要旨を逸脱しない範囲で、切削刃６と転造刃７の
数の変更や複合タップを高速度鋼製にする等各種変更が
可能であることはいうまでもない。The present invention is not limited to the above-mentioned embodiment, and various modifications such as changing the number of the cutting blades 6 and the rolling blades 7 and making the composite tap made of high-speed steel without departing from the scope of the present invention. Needless to say, it can be changed.
【００２２】[0022]
【発明の効果】以上、詳細に説明したように本発明に係
る切削・転造複合タップは、タップねじ部の外周に周方
向へ溝部を挾んで切削刃と転造刃を交互に配設してなる
ことを特徴とするので、タップの折損を未然に回避でき
ると共に仕上面の精度も向上させられる。As described above in detail, in the cutting / rolling composite tap according to the present invention, the cutting blades and the rolling blades are alternately arranged by circumferentially enclosing the groove portion on the outer periphery of the tap screw portion. Since it is characterized in that the breakage of the tap can be avoided in advance and the accuracy of the finished surface can be improved.
【００２３】また、前記切削刃のすくい面にチップブレ
ーカーを付設したことを特徴とするので。チップブレー
カーにより切り屑が細断され、切り屑の排出性が高ま
る。Further, a chip breaker is attached to the rake face of the cutting blade. Chips are shredded by the chip breaker, improving chip discharge.
【００２４】また、前記タップねじ部の谷径を浅くし、
ワーク下穴との隙間を小さく設定したことを特徴とする
ので、谷幅を大きくして前記隙間に入った切り屑による
楔作用でクラックが発生するのが未然に回避される。Further, the root diameter of the tap screw portion is made shallow,
Since the gap with the prepared hole is set to be small, it is possible to prevent the occurrence of cracks due to the wedge action of the chips entering the gap by increasing the valley width.
【００２５】また、前記タップはワーク下穴にテーパね
じを加工するテーパタップであることを特徴とするの
で、切削タップで必然的に発生していたストップマーク
（カットマーク）が消されるので、雄ねじが緩みやすく
なったり、ガス等の流体漏れが生じるということが、未
然に回避される。Further, since the tap is a taper tap for processing a taper screw in the prepared hole of the work, the stop mark (cut mark) which is inevitably generated in the cutting tap is erased, so that the male screw is It becomes possible to prevent loosening and leakage of fluid such as gas.
【図１】本発明の一実施例に係る超硬タップの構成図
で、同図（ａ）は側面図、同図（ｂ）は正面図、同図
（ｃ）は同図（ｂ）の拡大図である。1A and 1B are configuration diagrams of a cemented carbide tap according to an embodiment of the present invention, in which FIG. 1A is a side view, FIG. 1B is a front view, and FIG. 1C is a view of FIG. 1B. FIG.
【図２】同じく図１（ｃ）の要部拡大図である。FIG. 2 is also an enlarged view of a main part of FIG. 1 (c).
【図３】同じくタップ谷径の説明図である。FIG. 3 is also an explanatory view of a tap root diameter.
【図４】同じく作用説明図である。FIG. 4 is an explanatory view of the same operation.
【図５】従来の切削タップの不具合を示す作用説明図で
ある。FIG. 5 is an operation explanatory view showing a defect of the conventional cutting tap.
１ 超硬タップ ２ ねじ部 ３ シャンク部 ５ 溝 ６ 切削刃 ７ 転造刃 ８ チップブレーカー Ｗ ワーク Ｗａ 切り屑 1 Carbide tap 2 screw part 3 shank part 5 grooves 6 cutting blades 7 Rolled blade 8 chip breakers W work Wa chips
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐藤 一利 宮城県刈田郡七ケ宿町字萩崎15番地１号 株式会社ミヤギタノイ内 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Kazutoshi Sato 15-1 Hagizaki, Nanachijuku-machi, Karita-gun, Miyagi Prefecture Miyagi Tanoi Co., Ltd.
Claims (4)
んで切削刃と転造刃を交互に配設してなることを特徴と
する切削・転造複合タップ。1. A cutting / rolling composite tap, characterized in that a cutting blade and a rolling blade are alternately arranged with a groove portion sandwiched circumferentially around the tap screw portion.
ーを付設したことを特徴とする請求項１記載の切削・転
造複合タップ。2. The cutting / rolling composite tap according to claim 1, wherein a chip breaker is attached to the rake face of the cutting blade.
ク下穴との隙間を小さく設定したことを特徴とする請求
項１又は２記載の切削・転造複合タップ。3. The cutting / rolling composite tap according to claim 1 or 2, wherein a root diameter of the tap screw portion is made shallow and a clearance between the tap screw portion and the prepared hole is set small.
加工するテーパタップであることを特徴とする請求項
１，２又は３記載の切削・転造複合タップ。4. The cutting / rolling composite tap according to claim 1, wherein the tap is a taper tap for processing a taper screw in a prepared hole of a work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001328964A JP4324337B2 (en) | 2001-10-26 | 2001-10-26 | Cutting / rolling composite tap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001328964A JP4324337B2 (en) | 2001-10-26 | 2001-10-26 | Cutting / rolling composite tap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003136334A true JP2003136334A (en) | 2003-05-14 |
| JP4324337B2 JP4324337B2 (en) | 2009-09-02 |
Family
ID=19144938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001328964A Expired - Fee Related JP4324337B2 (en) | 2001-10-26 | 2001-10-26 | Cutting / rolling composite tap |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4324337B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7454204B2 (en) * | 2018-11-12 | 2024-03-22 | 株式会社田野井製作所 | Taps, unnecessary parts removed from taps, and tap materials |
| JP7465189B2 (en) | 2020-10-02 | 2024-04-10 | 三機工業株式会社 | Method and system for inspecting air outlets |
-
2001
- 2001-10-26 JP JP2001328964A patent/JP4324337B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP4324337B2 (en) | 2009-09-02 |
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