JPH01171725A - Spiral fluted tap with chip curler - Google Patents
Spiral fluted tap with chip curlerInfo
- Publication number
- JPH01171725A JPH01171725A JP33040687A JP33040687A JPH01171725A JP H01171725 A JPH01171725 A JP H01171725A JP 33040687 A JP33040687 A JP 33040687A JP 33040687 A JP33040687 A JP 33040687A JP H01171725 A JPH01171725 A JP H01171725A
- Authority
- JP
- Japan
- Prior art keywords
- groove
- curler
- tap
- cutting edge
- chip
- 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
- 238000000576 coating method Methods 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 8
- 150000002736 metal compounds Chemical class 0.000 claims description 4
- 238000004804 winding Methods 0.000 abstract description 15
- 238000010079 rubber tapping Methods 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000002173 cutting fluid Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Drilling Tools (AREA)
Abstract
Description
【発明の詳細な説明】
技術分野
本発明はねじれ溝タップに係り、特に、切屑が分断され
ずに連続する流れ形切屑に対しても良好な切屑排出性能
が得られるチップカーラ付ねじれ溝タップに関するもの
である。Detailed Description of the Invention Technical Field The present invention relates to a helical groove tap, and more particularly to a helical groove tap with a chip curler that provides good chip evacuation performance even for continuous flow-shaped chips without being separated. It is something.
従来技術
雌ねじを形成するためのねじ加工工具として従来からタ
ップが多用されているが、かかるタップの一種にねじれ
溝タップがある。これは、雄ねじが設けられたねじ部を
有し、その雄ねじのねじ山と交差するようにねじれ溝が
設けられることにより切刃が形成されているもので、一
般に、そのねじれ溝のねじれ角が大きくなる程切屑の巻
き径は小さくなり、切屑はタップの軸方向へ排出され易
くなる。BACKGROUND ART Taps have traditionally been widely used as thread processing tools for forming internal threads, and one type of such taps is a helical groove tap. This has a threaded part with a male thread, and a cutting edge is formed by providing a helical groove that intersects the thread of the male thread, and generally the helix angle of the helical groove is As the diameter increases, the winding diameter of the chips becomes smaller, and the chips are more likely to be discharged in the axial direction of the tap.
発明が解決しようとする問題点
しかしながら、上記ねじれ角が大きくなるのに伴い、ね
じの向きと溝のねじれ方向によって定まる一方のフラン
ク側における切刃の刃先角は小さくなって欠は易くなる
とともに、他方のフランク側における切刃のすくい角は
大きな負角となって切れ味が損なわれるため、ねじれ溝
のねじれ角は通常５０〜５５°程度が上限とされている
。また、前述したようにねじれ溝のねじれ角が大きくな
ると切屑の巻き径は小さくなるものの、切屑の流出角、
更には螺旋状を成す切屑のリード角が大きくなってその
長さが長くなり、却って切屑が排出され難くなるという
相反する現象を生じる。このようなことから、従来のね
じれ溝タップにおいては、必ずしも充分に満足し得る切
屑排出性能が得られるとは言い難く、例えば、切屑が分
断され難い延性の大きい被削材で、ねじ立て長さが大き
く、ねじ底に余裕の少ない止り穴などの悪条件が重なっ
た場合には、切屑の排出性が損なわれて切屑詰まりが発
生し、その結果としてタップ寿命、加工精度、仕上げ面
粗さ、加工能率等が阻害されることがあった。Problems to be Solved by the Invention However, as the helix angle increases, the cutting edge angle of the cutting edge on one flank side, which is determined by the direction of the thread and the helix direction of the groove, becomes smaller and chipping becomes easier. Since the rake angle of the cutting edge on the other flank side becomes a large negative angle and the cutting quality is impaired, the upper limit of the helix angle of the helical groove is usually about 50 to 55 degrees. In addition, as mentioned above, as the helix angle of the helical groove increases, the chip winding diameter decreases, but the chip outflow angle
Furthermore, the lead angle of the spiral chips becomes larger and the length becomes longer, which causes a contradictory phenomenon in which it becomes difficult to discharge the chips. For this reason, it is difficult to say that conventional helical flute taps provide sufficiently satisfactory chip evacuation performance. If unfavorable conditions such as a blind hole with a large diameter and little clearance at the bottom of the screw occur, chip evacuation will be impaired and chip clogging will occur, resulting in poor tap life, machining accuracy, finished surface roughness, etc. Processing efficiency, etc. was sometimes hindered.
問題点を解決するための手段
本発明は以上の事情を背景として為されたものであり、
その目的とするところは、ねじれ溝タップの切屑排出性
能を更に向上させて切屑詰まりを防止することにある。Means for Solving the Problems The present invention has been made against the background of the above circumstances.
The purpose is to further improve the chip evacuation performance of the helical groove tap and prevent chip clogging.
そして、かかる目的を達成するために、本発明は、前述
したねじれ溝タップにおいて、前記ねじ部の先端側の食
付き部における前記切刃のすくい面に、その切刃の稜線
に沿って断面が略円弧形状を成すカーラ溝を設け、その
切刃によって切削された切屑をそのカーラ溝によりカー
ルさせるようにしたことを特徴とする。In order to achieve this object, the present invention provides the above-described helical groove tap, in which the rake face of the cutting blade at the chamfered portion on the tip side of the threaded portion has a cross section along the ridgeline of the cutting blade. A feature is that a curler groove having a substantially arcuate shape is provided, and chips cut by the cutting blade are curled by the curler groove.
作用および発明の効果
このようなチップカーラ付ねじれ溝タップにおいては、
主として切削加工を行う食付き部の切刃によって切削さ
れた切屑は、カーラ溝により曲げモーメントが加えられ
て湾曲させられるため、その巻き径が小さくなる。これ
により、切屑の巻き径をカーラ溝によって調整できるよ
うになり、その巻き径を小さくするためにねじれ溝のね
じれ角を大きくする必要がなく、切刃の刃先強度や切れ
味が良好に保たれる。また、このように切屑の巻き径を
カーラ溝によって調整できるところから、ねじれ溝のね
じれ角により螺旋状切屑の長さやタップ長手方向への排
出性能を調整し得ることと相俟って、切屑の径寸法およ
び長さを独立に調整して共に小さくすることが可能とな
り、切屑の排出性能が向上して比較的分断され難い流れ
形切屑に対しても切屑詰まりが効果的に防止されるよう
になる。Function and Effects of the Invention In such a helical groove tap with a tip curler,
Chips cut by the cutting blade of the chamfered portion that mainly performs cutting are curved by the bending moment applied by the curler groove, so that the winding diameter thereof becomes smaller. This makes it possible to adjust the winding diameter of chips using the curler groove, eliminating the need to increase the helix angle of the helical groove in order to reduce the winding diameter, and maintaining good cutting edge strength and sharpness. . In addition, since the diameter of the chip winding can be adjusted using the curler groove, the length of the spiral chip and the discharge performance in the longitudinal direction of the tap can be adjusted by the helix angle of the helical groove. It is now possible to independently adjust the diameter and length to make them smaller, improving chip evacuation performance and effectively preventing chip clogging even with flow-shaped chips that are relatively difficult to break up. Become.
ここで、前記ねじれ溝が、そのねじれ方向が前記雄ねじ
のねじれ方向と同一方向で、前記食付き部にはそのねじ
れ溝よりもねじれ角が小さいスパイラルポイント溝を有
するものである場合には、ねじ立てすべき下穴が止り穴
の場合における切屑の軸方向への排出性能を良好に維持
しつつ、巻き径が小さく且つ長さが短い螺旋状切屑が排
出されるようになるとともに、刃先強度や切れ味が向上
させられる。Here, when the helix groove has a helix direction that is the same as the helix direction of the male thread, and the chamfered portion has a spiral point groove whose helix angle is smaller than that of the helix groove, the screw While maintaining good chip evacuation performance in the axial direction when the pilot hole to be erected is a blind hole, spiral chips with a small winding diameter and short length can be ejected, and the strength of the cutting edge and Sharpness can be improved.
また、前記切刃の表面に硬質金属化合物の被膜が設けら
れている場合には、一般に、高い耐溶着性、耐摩耗性に
よって切削の高速化、耐久性の著しい向上が認められる
ものの、切刃に構成刃先ができ難くなるとともに切屑が
巻き難くなる特性を有しており、カーラ溝がない従来の
ねじれ溝タップにおいては、切屑の排出性能が悪くなっ
てタップ性能が低下することがあったが、本発明に従え
ばそのような問題が改善され、硬質金属化合物被膜が有
する種々の利点を効果的に得られるようになる。In addition, when the surface of the cutting edge is coated with a hard metal compound, it is generally recognized that cutting speed is increased and durability is significantly improved due to high adhesion resistance and wear resistance. It has characteristics that make it difficult to form a built-up edge and make it difficult for chips to wrap around.In conventional helical groove taps without curler grooves, chip evacuation performance deteriorated and tap performance sometimes deteriorated. According to the present invention, such problems can be improved and various advantages of hard metal compound coatings can be effectively obtained.
なお、切屑の巻き径は、被削材の材質、切刃のすくい角
、′ａのねじれ角に大きく影響され、その他にもねじの
径、ピンチ、タップの材質、溝数。Note that the chip winding diameter is greatly influenced by the material of the workpiece, the rake angle of the cutting edge, and the helix angle of 'a, and is also influenced by the thread diameter, pinch, material of the tap, and number of grooves.
食付き長さ、更には切削速度、切削油剤等にもそれぞれ
影響されるため、前記カーラ溝の形状寸法を一様に定め
ることはできず、各種の条件を考慮して経験的、実験的
に最適な形状に設定することが望ましい。The shape and dimensions of the curler groove cannot be determined uniformly because they are affected by the biting length, cutting speed, cutting fluid, etc., and are determined empirically and experimentally by taking various conditions into consideration. It is desirable to set it to an optimal shape.
実施例
以下、本発明の一実施例を図面に基づいて詳細に説明す
る。EXAMPLE Hereinafter, an example of the present invention will be described in detail based on the drawings.
第１図は本発明の一実施例であるチップカーラ付ねじれ
溝タップ（以下、単にタップという）１０を示す正面図
である。かかるタップＩＯは右ねじ用のもので、先端側
のねじ部１２と基端側のシャンク部Ｉ４とから構成され
ているとともに、ねじ部１２には形成すべき雌ねじに対
応する右ねじの雄ねじ１６が設けられている。また、こ
のねじ部１２は、誰ねじ１６のねじ山が次第に低くなる
円錐形状の食付き部１８と、ねじ山の高さが略等しい円
柱形状の完全山部２０とから構成されている。FIG. 1 is a front view showing a twisted groove tap with tip curler (hereinafter simply referred to as tap) 10, which is an embodiment of the present invention. This tap IO is for a right-handed thread, and is composed of a threaded portion 12 on the distal end side and a shank portion I4 on the proximal end side, and the threaded portion 12 has a right-handed male thread 16 corresponding to the female thread to be formed. is provided. Further, this threaded portion 12 is composed of a conical chamfered portion 18 in which the thread of the round screw 16 is gradually lowered, and a cylindrical complete threaded portion 20 in which the height of the thread is approximately equal.
上記ねじ部１２には、雄ねじ１６と交差するように３本
のねじれ溝２２が設けられ、これにより雄ねじ１６は複
数に分断されて、その一方の端面にそれぞれ切刃２４が
形成されている。ねじれ溝２２は、タップ１０の先端部
を拡大して示す第２図に示されているように、雄ねじ１
６のねじれ方向と同じ方向にねじれ角αで設けられてお
り、その先端部、すなわち前記食付き部１８とされた部
分には、更にスパイラルポイント溝２６が設けられてい
る。したがって、この食付き部１８ではスパイラルポイ
ント溝２６により切刃２４が形成されることとなるが、
このスパイラルポイント溝２６のねじれ角βは上記ねじ
れ角αよりも小さい。Three helical grooves 22 are provided in the threaded portion 12 so as to intersect with the male thread 16, and thereby the male thread 16 is divided into a plurality of parts, each of which has a cutting edge 24 formed on one end surface. As shown in FIG. 2, which shows an enlarged view of the tip of the tap 10, the helical groove 22 is formed by the male thread 1.
The spiral point groove 26 is provided at a helix angle α in the same direction as the helix direction of the groove 6, and a spiral point groove 26 is further provided at the tip thereof, that is, the portion that is the chamfered portion 18. Therefore, in this chamfered portion 18, a cutting edge 24 is formed by the spiral point groove 26.
The helix angle β of this spiral point groove 26 is smaller than the helix angle α.
一方、上記食付き部１８における切刃２４のすくい面、
すなわち前記スパイラルポイント溝２６の内壁面であっ
て切刃２４に接する部分には、第２図のｍ−ｍ断面を拡
大して示す第３図から明らかなように、切刃２４の稜線
に沿って断面が略円弧形状を成すカーラ溝２８が設けら
れている。切刃２４の稜線とは、前記雄ねじ１６のねじ
山の頂とスパイラルポイント溝２６とが交差する部分の
線である。また、かかるタップ１０のねじ部１２には、
その全長に亘って窒化チタン（Ｔ ｉ Ｎ）の被膜３０
がイオンコーティング法等の適宜の被覆手段によって設
けられている。On the other hand, the rake surface of the cutting edge 24 in the biting portion 18,
That is, as is clear from FIG. 3, which is an enlarged view of the mm-m cross section of FIG. A curler groove 28 having a substantially arcuate cross section is provided. The ridgeline of the cutting edge 24 is a line where the top of the thread of the male thread 16 and the spiral point groove 26 intersect. In addition, the threaded portion 12 of the tap 10 includes:
A coating 30 of titanium nitride (T i N) is applied over its entire length.
is provided by a suitable coating method such as an ion coating method.
そして、このようなタップ１０はタッピングマシン等に
取り付けられ、その先端側から被加工物に予め形成され
た下穴円にねじ込まれることにより、主として食付き部
１８の切刃２４によって切削加工を行いつつ下穴の内周
面に雌ねじを形成する。また、完全山部２０は、食付き
部１８によって形成された雌ねじに螺合されることによ
り、タップ１０を１回転で１ピツチずつ下穴円に螺入さ
せる働きをする。Such a tap 10 is attached to a tapping machine or the like, and is screwed from the tip side into a prepared hole circle previously formed in the workpiece to perform cutting mainly with the cutting edge 24 of the chamfered portion 18. Then, form a female thread on the inner circumferential surface of the prepared hole. Further, the complete ridge portion 20 serves to screw the tap 10 into the pilot hole circle one pitch at a time in one rotation by being screwed into the female thread formed by the chamfered portion 18.
ここで、延性の大きい被削材に対してねじ立てを行うと
、第４図に示されているように螺旋状に連続した切屑３
２がねじれ−ａ２２を通して排出されるが、本実施例の
タップ１０の食付き部１８には、切刃２４の稜線に沿っ
てカーラ溝２８が設けられているため、その食付き部１
８の切刃２４によって切削された切屑３２は、カーラ４
２８により曲げモーメントが加えられて湾曲させられ、
その巻き径りが小さくなる。このため、切屑３２の巻き
径りを小さくするためにスパイラルポイント溝２６のね
じれ角βを大きくする必要がなく、切刃２４の刃先強度
や切れ味が良好に保たれる。When tapping a highly ductile work material, a continuous spiral of chips 3 appears as shown in Figure 4.
However, since the chamfered portion 18 of the tap 10 of this embodiment is provided with a collar groove 28 along the ridgeline of the cutting edge 24, the chamfered portion 1
The chips 32 cut by the cutting blade 24 of 8 are removed by the curler 4.
A bending moment is applied by 28 to make it curve,
The winding diameter becomes smaller. Therefore, it is not necessary to increase the helix angle β of the spiral point groove 26 in order to reduce the winding diameter of the chips 32, and the edge strength and sharpness of the cutting blade 24 are maintained good.
また、上記スパイラルポイント溝２６のねじれ角βを小
さくすれば、切屑３２のリード角、更には螺旋状切屑３
２の全長を小さくすることができるため、上記のように
カーラ溝２８によって巻き径りを小さくできることと相
俟って、切屑３２の巻き径りおよび長さを共に小さくす
ることが可能となり、切屑３２の排出性能が向上して流
れ形の切屑となる延性の大きい被削材に対しても、切屑
詰まりを生じることな（良好な切削加工を行うことがで
きる。これにより、工具寿命、加工精度。Moreover, if the helix angle β of the spiral point groove 26 is made smaller, the lead angle of the chips 32 and furthermore the spiral chips 3
Since the overall length of the chips 32 can be made smaller, in combination with the fact that the winding diameter can be made smaller by the curler groove 28 as described above, it is possible to reduce both the winding diameter and the length of the chips 32. 32's ejection performance has been improved, and even on highly ductile workpiece materials that produce flow-shaped chips, it is possible to perform good cutting without causing chip clogging.This improves tool life and machining accuracy. .
仕上げ面粗さ、加工能率の向上等に著しい効果が得られ
る。なお、スパイラルポイント溝２６のねじれ角βを小
さくすれば、それだけカーラ溝２８を形成するための研
削加工も容易となる。Significant effects can be obtained in improving the finished surface roughness and machining efficiency. Note that the smaller the helix angle β of the spiral point groove 26, the easier the grinding process for forming the curler groove 28.
さらに、本実施例のタップ１０は、雄ねじ１６のねじれ
方向と同じ方向にねじれ溝２２が形成されているため、
切屑３２はそのねじれ′ａ２２を通ってタップ１０の基
端側へ排出されることとなり、止り穴に対しても良好に
ねじ立てを行うことができる。特に、本実施例では食付
き部１８にスパイラルポイント溝２６が設けられ、その
ねじれ角βにより切屑３２の長さを調整するようにして
いるため、切屑３２の形状とは無関係にねじれ溝２２の
ねじれ角αを大きくすることができ、切屑３２の軸方向
への排出性能が良好に維持されるのである。Furthermore, since the tap 10 of this embodiment has the twisted groove 22 formed in the same direction as the twisted direction of the male thread 16,
The chips 32 are discharged to the proximal end side of the tap 10 through the twist 'a22', and it is possible to successfully tap a blind hole. In particular, in this embodiment, the spiral point groove 26 is provided in the chamfered portion 18, and the length of the chip 32 is adjusted by the helix angle β. The helix angle α can be increased, and the performance of discharging chips 32 in the axial direction can be maintained satisfactorily.
一方、前記ねじ部１２の表面には窒化チタンの被膜３０
が設けられているため、窒化チタンがもつ高い耐溶着性
、耐摩耗性により、切削の貰速化を図ることができると
ともに、耐久性も向上する。On the other hand, a titanium nitride coating 30 is formed on the surface of the threaded portion 12.
Since titanium nitride has high welding resistance and wear resistance, cutting speed can be increased and durability is also improved.
この場合に、被膜３０の存在により切刃２４には構成刃
先ができ難くなり、切屑３２は巻き難くなるため、カー
ラ？８２８がない従来のねじれ溝タップにおいては切屑
の排出性能が悪くなり、却ってタップ性能が低下するこ
とがあったが、本実施例のタップｌＯにおいてはカーラ
溝２８の存在により切屑３２が良好に巻かれ、ねじれ溝
２２を通って良好に排出されるため、窒化チタン被膜３
２が有する種々の利点を効果的に享受し得るのである。In this case, the presence of the coating 30 makes it difficult to form a built-up edge on the cutting edge 24, making it difficult for the chips 32 to wind up, so it is difficult to curl. In the conventional helical groove tap without 828, the chip evacuation performance deteriorated, and the tap performance sometimes deteriorated, but in the tap IO of this embodiment, the presence of the curler groove 28 allows the chips 32 to be rolled up well. The titanium nitride coating 3
Therefore, the various advantages of 2 can be effectively enjoyed.
因に、高速度工具鋼製のタップで、呼びがＭ１６×２．
溝数が３２食付き部の長さが２．５山、ねじれ？薄のね
じれ角（α）が３５°、スパイラルポイント溝のねじれ
角（β）が２０°２食付き部における切刃のすくい角が
６°、カーラ溝の形状寸法は第５図に示されているよう
に半径が１龍、ねじ部の表面には２〜３μｍの窒化チタ
ン被膜が設けられた本発明に係るチップカーラ付ねじれ
溝タップを用いて、被削材質５Ｓ４１の止り穴に切削速
度２００ｒｐｍで硫塩他系切削油剤を使用してタッピン
グを行ったところ、切屑の巻き径りは２．７＋ｎ。Incidentally, it is a tap made of high-speed tool steel, and the nominal size is M16 x 2.
The number of grooves is 32, the length of the chamfered part is 2.5 grooves, and is it twisted? The helix angle (α) of the thin blade is 35°, the helix angle (β) of the spiral point groove is 20°, the rake angle of the cutting edge at the biting part is 6°, and the shape and dimensions of the curler groove are shown in Figure 5. Using the helical groove tap with tip curler according to the present invention, which has a radius of 1 mm and a titanium nitride coating of 2 to 3 μm thick on the surface of the threaded part, a blind hole of the workpiece material 5S41 was cut at a cutting speed of 200 rpm. When tapping was performed using a sulfate-based cutting fluid, the chip diameter was 2.7+n.
ピッチＰ（第４図参照）は３．３１であった。これに対
し、スパイラルポイント溝およびカーラ溝が設けられて
いない従来のねじれ溝タップによる切屑の巻き径りは４
〜５寵、ピッチＰは７〜９ ｍｍであった。なお、第５
図の２４’、２６’、２８“は、前記実施例における切
刃２４．スパイラルポイント溝２６．カーラ溝２８にそ
れぞれ対応するもので、理解を容易とするために付した
ものである。また、従来のねじれ溝タップの各諸元は、
スパイラルポイント溝およびカーラ溝がないことを除い
て本発明品と同じである。The pitch P (see Figure 4) was 3.31. In contrast, the chip winding diameter of a conventional helical groove tap without spiral point grooves or curler grooves is 4.
-5 mm, pitch P was 7-9 mm. In addition, the fifth
24', 26', and 28'' in the figure correspond to the cutting blade 24, spiral point groove 26, and curler groove 28 in the above embodiment, respectively, and are added for easy understanding. The specifications of the conventional helical groove tap are as follows:
It is the same as the product of the present invention except that it does not have a spiral point groove and a curler groove.
以上、本発明の一実施例並びに試験結果を詳細に説明し
たが、本発明は他の態様で実施することもできる。Although one embodiment and test results of the present invention have been described above in detail, the present invention can also be implemented in other embodiments.
例えば、前記実施例のタップ１０にはスパイラルポイン
ト溝２６が設けられているが、これは必ずしも必要なも
のではなく、食付き部１８におけるねじれ溝２２の内壁
面が切刃２４と接する部分に直接カーラ溝２８を設ける
ことも可能である。For example, although the tap 10 of the above embodiment is provided with a spiral point groove 26, this is not necessarily necessary, and the inner wall surface of the helical groove 22 in the chamfered portion 18 is directly in contact with the cutting edge 24. It is also possible to provide curler grooves 28.
また、前記実施例では３枚刃のタップ１０について説明
したが、２枚刃、４枚刃以上のタップにも本発明は同様
に適用され得る。Further, in the above embodiment, a three-blade tap 10 has been described, but the present invention can be similarly applied to taps with two or more blades.
また、前記実施例ではねじ部１２の表面に窒化チタンの
被膜３０が設けられているが、窒化チタンの替わりにＴ
ｉＣ，ＨｆＮ等の他の硬質金属化合物を用いることがで
きることは勿論、かかる被膜３０がなくてもカーラ溝２
８の存在に伴う本発明の効果は充分に得られる。Further, in the above embodiment, the titanium nitride coating 30 is provided on the surface of the threaded portion 12, but instead of titanium nitride, T
It goes without saying that other hard metal compounds such as iC and HfN can be used, and even without such a coating 30, the curler groove 2
The effects of the present invention due to the presence of 8 can be sufficiently obtained.
また、前記実施例では雄ねじ１６のねじれ方向と同じ方
向にねじれたねじれ溝２２が設けられて、切屑３２がタ
ップ１０の基端側へ排出されるようになっているが、通
り穴に用いるタップの場合には、雄ねじ１６のねじれ方
向と逆方向にねじれたねじれ溝を設けるようにしても差
支えない。Further, in the embodiment described above, the twisted groove 22 twisted in the same direction as the twisted direction of the male thread 16 is provided so that the chips 32 are discharged toward the proximal end of the tap 10. In this case, a twisted groove twisted in the direction opposite to the twisted direction of the male thread 16 may be provided.
その他−々例示はしないが、本発明は当業者の知識に基
づいて種々の変更、改良を加えた態様で実施することが
できる。Although other examples are not provided, the present invention can be implemented with various modifications and improvements based on the knowledge of those skilled in the art.
第１図は本発明の一実施例であるチップカーラ付ねじれ
溝タップを示す正面図である。第２図は第１図のチップ
カーラ付ねじれ溝タップの先端部を拡大して示す図であ
る。第３図は第２図におけるＩ−１断面の拡大図である
。第４図は第１図のチップカーラ付ねじれ溝タップによ
って削り出される切屑の正面図である。第５図は本発明
に係るチップカーラ付ねじれ溝タップにおけるカーラ溝
の形状寸法の一例を説明する図である。
１０：チソブカーライ寸ねじれンｎタソフ。
１２：ねじ部 １６：雄ねじ
１８：食付き部 ２２：ねじれ溝２４：切刃
２６：スパイラルポイント溝
２８：カーラ溝 ３０：被ＩＩダ３２：切屑
α、β：ねじれ角
第１図 第２図
第３因
第５図
第４図FIG. 1 is a front view showing a twisted groove tap with a chip curler, which is an embodiment of the present invention. FIG. 2 is an enlarged view of the tip of the tip curler-equipped twisted groove tap shown in FIG. 1. FIG. 3 is an enlarged view of the I-1 cross section in FIG. 2. FIG. 4 is a front view of chips cut out by the helical groove tap with chip curler of FIG. 1. FIG. 5 is a diagram illustrating an example of the shape and dimensions of the curler groove in the tip curler-equipped twisted groove tap according to the present invention. 10: Chisobkarai dimension twist n tasov. 12: Threaded portion 16: Male thread 18: Chamfered portion 22: Helix groove 24: Cutting edge 26: Spiral point groove 28: Curler groove 30: Target II 32: Chips α, β: Helix angle Fig. 1 Fig. 2 3 causes Figure 5 Figure 4
Claims (3)
じ山と交差するようにねじれ溝が設けられることにより
切刃が形成されているねじれ溝タップにおいて、 前記ねじ部の先端側の食付き部における前記切刃のすく
い面に、該切刃の稜線に沿って断面が略円弧形状を成す
カーラ溝を設け、該切刃によって切削された切屑を該カ
ーラ溝によりカールさせるようにしたことを特徴とする
チップカーラ付ねじれ溝タップ。(1) In a helical groove tap having a threaded portion provided with a male thread, and in which a cutting edge is formed by providing a helical groove so as to intersect with the thread of the male thread, the distal end side of the threaded portion A curler groove having a substantially arc-shaped cross section is provided along the ridgeline of the cutting edge on the rake face of the cutting edge in the biting part, so that chips cut by the cutting edge are curled by the curler groove. A twisted groove tap with a tip curler.
ねじれ方向と同一方向で、前記食付き部には該ねじれ溝
よりもねじれ角が小さいスパイラルポイント溝を有する
ものである特許請求の範囲第１項に記載のチップカーラ
付ねじれ溝タップ。(2) The helical groove has a twisting direction in the same direction as the male thread, and the chamfered portion has a spiral point groove having a smaller helix angle than the helical groove. The helical groove tap with chip curler described in item 1.
るものである特許請求の範囲第１項または第２項に記載
のチップカーラ付ねじれ溝タップ。(3) The helical groove tap with tip curler according to claim 1 or 2, wherein the cutting blade has a hard metal compound coating on its surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33040687A JPH01171725A (en) | 1987-12-23 | 1987-12-23 | Spiral fluted tap with chip curler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33040687A JPH01171725A (en) | 1987-12-23 | 1987-12-23 | Spiral fluted tap with chip curler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01171725A true JPH01171725A (en) | 1989-07-06 |
Family
ID=18232244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33040687A Pending JPH01171725A (en) | 1987-12-23 | 1987-12-23 | Spiral fluted tap with chip curler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01171725A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7553114B2 (en) | 2001-04-30 | 2009-06-30 | Sandvik Intellectual Property Ab | Thread cutting tap and a method of its manufacture |
| US7665934B2 (en) | 2006-10-18 | 2010-02-23 | Kennametal Inc. | Cutting tap and method of making a cutting tap |
| US7950880B2 (en) | 2006-10-18 | 2011-05-31 | Kennametal Inc. | Spiral flute tap |
| JP4836385B2 (en) * | 2000-02-23 | 2011-12-14 | ティーディーワイ・インダストリーズ・インコーポレーテッド | Screw milling tool with spiral longitudinal grooves |
| US8087856B2 (en) * | 2006-09-22 | 2012-01-03 | Reed Gary J | Double helix thread cutting tap |
| US8272817B2 (en) * | 2006-09-19 | 2012-09-25 | Emuge-Werk Richard Glimpel Gmbh & Co. Kg Fabrik Fur Prazisionswerkzeuge | Tool for machining a workpiece |
| WO2013132665A1 (en) | 2012-03-09 | 2013-09-12 | オーエスジー株式会社 | Spiral tap |
| WO2014013549A1 (en) * | 2012-07-17 | 2014-01-23 | オーエスジー株式会社 | Spiral tap and manufacturing method therefor |
| JP2014168822A (en) * | 2013-03-01 | 2014-09-18 | Sumitomo Electric Hardmetal Corp | Three-blade twist drill |
| US8841005B2 (en) | 2006-10-25 | 2014-09-23 | Kennametal Inc. | Articles having improved resistance to thermal cracking |
| US8858870B2 (en) | 2008-08-22 | 2014-10-14 | Kennametal Inc. | Earth-boring bits and other parts including cemented carbide |
| US9016406B2 (en) | 2011-09-22 | 2015-04-28 | Kennametal Inc. | Cutting inserts for earth-boring bits |
| US9266171B2 (en) | 2009-07-14 | 2016-02-23 | Kennametal Inc. | Grinding roll including wear resistant working surface |
| US9435010B2 (en) | 2009-05-12 | 2016-09-06 | Kennametal Inc. | Composite cemented carbide rotary cutting tools and rotary cutting tool blanks |
| US9643236B2 (en) | 2009-11-11 | 2017-05-09 | Landis Solutions Llc | Thread rolling die and method of making same |
| CN111097979A (en) * | 2018-10-29 | 2020-05-05 | 埃莫克精密工具厂里查德格林普尔有限责任两合公司 | Thread former with raised ridge |
| US11065701B2 (en) | 2017-06-19 | 2021-07-20 | Nachi-Fujikoshi Corp. | Tap |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59196120A (en) * | 1983-04-18 | 1984-11-07 | Hitachi Zosen Corp | Spiral tap |
-
1987
- 1987-12-23 JP JP33040687A patent/JPH01171725A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59196120A (en) * | 1983-04-18 | 1984-11-07 | Hitachi Zosen Corp | Spiral tap |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4836385B2 (en) * | 2000-02-23 | 2011-12-14 | ティーディーワイ・インダストリーズ・インコーポレーテッド | Screw milling tool with spiral longitudinal grooves |
| US7553114B2 (en) | 2001-04-30 | 2009-06-30 | Sandvik Intellectual Property Ab | Thread cutting tap and a method of its manufacture |
| US8272817B2 (en) * | 2006-09-19 | 2012-09-25 | Emuge-Werk Richard Glimpel Gmbh & Co. Kg Fabrik Fur Prazisionswerkzeuge | Tool for machining a workpiece |
| US8087856B2 (en) * | 2006-09-22 | 2012-01-03 | Reed Gary J | Double helix thread cutting tap |
| US7665934B2 (en) | 2006-10-18 | 2010-02-23 | Kennametal Inc. | Cutting tap and method of making a cutting tap |
| US7950880B2 (en) | 2006-10-18 | 2011-05-31 | Kennametal Inc. | Spiral flute tap |
| US8841005B2 (en) | 2006-10-25 | 2014-09-23 | Kennametal Inc. | Articles having improved resistance to thermal cracking |
| US8858870B2 (en) | 2008-08-22 | 2014-10-14 | Kennametal Inc. | Earth-boring bits and other parts including cemented carbide |
| US9435010B2 (en) | 2009-05-12 | 2016-09-06 | Kennametal Inc. | Composite cemented carbide rotary cutting tools and rotary cutting tool blanks |
| US9266171B2 (en) | 2009-07-14 | 2016-02-23 | Kennametal Inc. | Grinding roll including wear resistant working surface |
| US9643236B2 (en) | 2009-11-11 | 2017-05-09 | Landis Solutions Llc | Thread rolling die and method of making same |
| US9016406B2 (en) | 2011-09-22 | 2015-04-28 | Kennametal Inc. | Cutting inserts for earth-boring bits |
| US20150016911A1 (en) * | 2012-03-09 | 2015-01-15 | Osg Corporation | Spiral tap |
| JPWO2013132665A1 (en) * | 2012-03-09 | 2015-07-30 | オーエスジー株式会社 | Spiral tap |
| EP2823925A4 (en) * | 2012-03-09 | 2015-12-30 | Osg Corp | Spiral tap |
| WO2013132665A1 (en) | 2012-03-09 | 2013-09-12 | オーエスジー株式会社 | Spiral tap |
| US20150251261A1 (en) * | 2012-07-17 | 2015-09-10 | Osg Corporation | Spiral tap |
| JP5816368B2 (en) * | 2012-07-17 | 2015-11-18 | オーエスジー株式会社 | Spiral tap |
| WO2014013549A1 (en) * | 2012-07-17 | 2014-01-23 | オーエスジー株式会社 | Spiral tap and manufacturing method therefor |
| JP2014168822A (en) * | 2013-03-01 | 2014-09-18 | Sumitomo Electric Hardmetal Corp | Three-blade twist drill |
| US11065701B2 (en) | 2017-06-19 | 2021-07-20 | Nachi-Fujikoshi Corp. | Tap |
| CN111097979A (en) * | 2018-10-29 | 2020-05-05 | 埃莫克精密工具厂里查德格林普尔有限责任两合公司 | Thread former with raised ridge |
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