JPH0588836U - Build-up tap with relief hole at the tip - Google Patents
Build-up tap with relief hole at the tipInfo
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- JPH0588836U JPH0588836U JP3797292U JP3797292U JPH0588836U JP H0588836 U JPH0588836 U JP H0588836U JP 3797292 U JP3797292 U JP 3797292U JP 3797292 U JP3797292 U JP 3797292U JP H0588836 U JPH0588836 U JP H0588836U
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- tip
- thread
- diameter
- hole
- tap
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Abstract
(57)【要約】
【目的】 被加工物の下穴底部に存在する突起との干渉
を避けるために食付き部の先端面に逃げ穴を備えた先端
逃げ穴付き盛上げタップにおいて、食付き部先端側の強
度を確保しつつ大きな逃げ穴を形成できるようにする。
【構成】 食付き部２２の第２ねじ山２０を、外径およ
び有効径については軸方向の先端に向かう程径寸法が小
さくなるが、谷径については完全山部１８における第１
ねじ山１６の谷径と等しい一定の径寸法とし、食付き部
２２の先端面２８に大きめの逃げ穴３０を設けた。
(57) [Summary] [Purpose] In a build-up tap with a clearance hole at the tip to prevent interference with the protrusions existing at the bottom of the pilot hole of the workpiece, A large escape hole can be formed while ensuring the strength on the tip side. [Structure] The outer diameter and the effective diameter of the second thread 20 of the chamfered portion 22 become smaller toward the tip in the axial direction, but the valley diameter is smaller than that of the first thread in the complete mountain portion 18.
The diameter of the thread 16 was made equal to the root diameter of the thread 16, and a large relief hole 30 was provided in the tip surface 28 of the bite portion 22.
Description
【０００１】[0001]
本考案は、有底の下穴の底部に存在する突起との干渉を避けるために先端面に 逃げ穴が設けられた先端逃げ穴付き盛上げタップの改良に関するものである。 The present invention relates to an improvement of a build-up tap with a tip clearance hole, which has a clearance hole at the tip surface thereof in order to avoid interference with a projection existing at the bottom of a bottomed pilot hole.
【０００２】[0002]
径寸法が等しい第１ねじ山が形成された完全山部と、その完全山部の第１ねじ 山に連続して設けられるとともに軸方向の先端に向かう程径寸法が小さくなる第 ２ねじ山が形成された食付き部とを備え、被加工物に設けられた下穴内に前記食 付き部側からねじ込まれることにより、その下穴の内壁表層部を塑性変形させて 雌ねじを成形する盛上げタップが従来から知られている。また、奥行き寸法が比 較的短い有底の下穴に雌ねじを加工する場合であって、しかもその下穴の底部に 突起が存在するような場合には、要求される雌ねじの長さ寸法を確保しつつ突起 と干渉することなくねじ立てができるように、上記食付き部の先端面に逃げ穴を 設けることがある。図４の盛上げタップ５０は、かかる先端逃げ穴付き盛上げタ ップの一例であり、雌ねじ６４を加工すべき被加工物５６の下穴６２の底部に存 在する突起５８との干渉を避けるため、食付き部５２の先端面に逃げ穴６０が形 成されている。なお、このように雌ねじを形成すべき下穴の底部に突起を有する 被加工物としては、例えば図６に示すブレーキホースの口金等が知られている。 A complete thread portion with a first thread having the same diameter is formed, and a second thread provided continuously to the first thread of the complete thread portion and having a smaller diameter dimension toward the tip in the axial direction. A raised tap for forming a female screw by plastically deforming the surface layer of the inner wall of the prepared hole by screwing from the side of the prepared part into the prepared hole provided in the workpiece. Known from the past. In addition, when processing a female screw in a pilot hole with a bottom that has a comparatively short depth dimension, and if there is a protrusion at the bottom of the pilot hole, specify the required length dimension of the female screw. An escape hole may be provided on the tip surface of the above-mentioned bite portion so that tapping can be performed without interfering with the protrusion while securing. The build-up tap 50 of FIG. 4 is an example of such a build-up tap with a clearance hole at the tip, in order to avoid interference with the protrusion 58 existing at the bottom of the prepared hole 62 of the workpiece 56 to be machined with the female screw 64. An escape hole 60 is formed in the tip surface of the bite-in portion 52. As a work piece having a projection at the bottom of the prepared hole for forming the internal thread, for example, a mouthpiece of a brake hose shown in FIG. 6 is known.
【０００３】[0003]
しかしながら、このような先端逃げ穴付き盛上げタップにおいては、被加工物 を塑性変形させるために径方向から大きな負荷が加わる食付き部先端の肉厚が薄 くなるため、その突起に対応して大きな逃げ穴を形成しようとすると、十分な強 度が得られなくなって工具が破損し易くなるという問題があった。前記盛上げタ ップ５０について具体的に説明すると、食付き部５２に設けられた第２ねじ山５ ４は、その外径，有効径，および谷径がそれぞれ先端に向かうに従って小さくさ れているため、径寸法の小さい食付き部５２の先端部分では第２ねじ山５４の谷 底から逃げ穴６０までの肉厚が薄くなり、十分な強度が得られなくなってしまう のである。なお、切れ刃により雌ねじを切削加工するねじ切削タップは、径方向 から受ける負荷が盛上げタップに比較して小さいため、上記のように肉厚が薄く なっても強度的にそれ程問題となることはない。 However, in such a build-up tap with a clearance hole at the tip, the wall thickness of the tip of the biting part, which is subject to a large load in the radial direction to plastically deform the work piece, becomes thin, and the protrusion is large. If an attempt is made to form a clearance hole, sufficient strength cannot be obtained, and the tool tends to be damaged. Explaining the build-up tap 50 in detail, the outer diameter, effective diameter, and valley diameter of the second screw thread 54 provided in the bite portion 52 are reduced toward the tip. Therefore, at the tip portion of the bite portion 52 having a small diameter, the wall thickness from the root of the second screw thread 54 to the clearance hole 60 becomes thin, and sufficient strength cannot be obtained. Since a thread cutting tap that cuts an internal thread with a cutting edge receives a smaller load in the radial direction than a raised tap, even if the wall thickness becomes thin as described above, it does not pose a serious problem in terms of strength. Absent.
【０００４】 一方、食付き部先端側の強度を確保するために、例えば図５の盛上げタップ７ ０のように食付き部７２の先端面に小さな逃げ穴７４を形成した場合には、突起 ５８との干渉を避けるためにタップのねじ込み深さが浅くなり、予め定められた 所定の長さ寸法の雌ねじ６４を形成するためには、食付き部７２の長さＣをその 分だけ短くしなければならない。このように食付き部７２の長さＣを短くすると 、１山当たりの加工量が多くなるため、それだけ負荷が大きくなり、上記と同様 に工具破損を招くばかりでなく加工精度も損なわれる。On the other hand, in order to secure the strength on the tip side of the biting portion, when a small clearance hole 74 is formed in the tip surface of the biting portion 72 as in the build-up tap 70 of FIG. In order to avoid interference with the tap, the tapping depth becomes shallow, and in order to form the female screw 64 of a predetermined length dimension, the length C of the bite portion 72 must be shortened by that amount. I have to. When the length C of the biting portion 72 is shortened in this way, the amount of machining per mountain increases, so that the load increases accordingly, not only causing tool damage as in the above, but also degrading the machining accuracy.
【０００５】 本考案は以上の事情を背景として為されたもので、その目的とするところは、 食付き部の先端側における強度を充分に確保しつつ大きな逃げ穴を形成できるよ うにすることにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to form a large escape hole while sufficiently securing the strength at the tip side of the bite portion. is there.
【０００６】[0006]
かかる目的を達成するため、本考案の要旨とするところは、径寸法が等しい第 １ねじ山が形成された完全山部と、その完全山部の第１ねじ山に連続して設けら れるとともに軸方向の先端に向かう程径寸法が小さくなる第２ねじ山が形成され た食付き部と、その食付き部の先端面に設けられた逃げ穴とを備え、被加工物に 設けられた有底の下穴内に前記食付き部側からねじ込まれることにより、その下 穴の底部に存在する突起と干渉することなくその下穴の内壁表層部を塑性変形さ せて雌ねじを成形する先端逃げ穴付き盛上げタップにおいて、前記食付き部の第 ２ねじ山を、その外径および有効径についてはそれぞれ軸方向の先端に向かう程 径寸法が小さくなるが、谷径については前記完全山部における第１ねじ山の谷径 と略等しい略一定の径寸法としたことにある。 In order to achieve such an object, the gist of the present invention is that a complete thread portion having a first thread having the same diameter is formed, and the first thread thread of the complete thread portion is provided continuously. It is equipped with a chamfered part formed with a second screw thread whose diameter decreases toward the tip in the axial direction, and an escape hole provided in the tip surface of the chamfered part. By being screwed into the prepared hole at the bottom from the side of the bite, the inner surface of the prepared hole is plastically deformed without interfering with the projections existing at the bottom of the prepared hole to form a female screw. In the built-up embossing tap, the outer diameter and the effective diameter of the second thread of the bite portion become smaller toward the tip in the axial direction, but the valley diameter becomes smaller than the first thread in the complete mountain portion. Approximately equal to the root diameter of the screw thread It lies in the fact that the diameter dimension was.
【０００７】[0007]
このような先端逃げ穴付き盛上げタップにおいては、食付き部の第２ねじ山が 、その外径および有効径についてはそれぞれ軸方向の先端に向かう程径寸法が小 さくなるが、谷径については完全山部における第１ねじ山の谷径と略等しい略一 定の径寸法とされているため、食付き部先端面に逃げ穴を形成しても、径寸法が 小さい食付き部先端側における第２ねじ山の谷底から逃げ穴までの肉厚を大きく できる。これにより、食付き部先端の強度を十分に確保しつつ、その食付き部の 先端面に比較的大きな逃げ穴を形成することが可能となり、食付き部の長さをで きるだけ長くして１山当たりの負荷を小さく維持することにより、精度の高い雌 ねじを安定して加工できるようになるとともに、工具寿命が向上させられる。 In such a build-up tap with a clearance hole at the tip, the outer diameter and the effective diameter of the second thread of the chamfer become smaller toward the tip in the axial direction, but the valley diameter becomes smaller. Since the diameter is almost the same as the root diameter of the first screw thread in the complete crest part, even if an escape hole is formed in the tip surface of the bite part, the tip side of the bite part where the diameter is small is small. The wall thickness from the root of the second screw thread to the relief hole can be increased. This makes it possible to form a relatively large clearance hole in the tip surface of the bite part while ensuring sufficient strength at the tip of the bite part, making the length of the bite part as long as possible. By keeping the load per mountain small, it becomes possible to stably machine highly accurate internal threads and to improve the tool life.
【０００８】[0008]
以下、本考案の一実施例を図面に基づいて詳細に説明する。 An embodiment of the present invention will be described below in detail with reference to the drawings.
【０００９】 図２は本考案の一実施例である先端逃げ穴付き盛上げタップ（以下、単に盛上 げタップという）１０の正面図であり、図３は先端側からの視図である。この盛 上げタップ１０は、タッピングマシン等に把持されるシャンク部１２と、成形す べき雌ねじに対応する雄ねじが形成されたねじ部１４とからなり、ねじ部１４は 、径寸法が等しい第１ねじ山１６が形成された完全山部１８と、その完全山部１ ８の第１ねじ山１６に連続して設けられ且つ軸方向の先端に向かう程径寸法が小 さくなる第２ねじ山２０が形成された食付き部２２とから構成されている。図３ から判るように、ねじ部１４は、周方向において等間隔な３箇所に突出部２４を 備えているとともに、それら突出部２４の中間部分はそれぞれ逃げ部２６とされ ており、上記３箇所の突出部２４によって雌ねじの盛上げ成形が行われるように なっている。FIG. 2 is a front view of a build-up tap (hereinafter referred to simply as build-up tap) 10 having a tip clearance hole according to an embodiment of the present invention, and FIG. 3 is a view from the tip side. The raising tap 10 includes a shank portion 12 to be gripped by a tapping machine or the like, and a screw portion 14 having a male screw corresponding to a female screw to be formed. The screw portion 14 is a first screw having an equal diameter. The complete thread portion 18 in which the thread 16 is formed, and the second thread thread 20 which is provided continuously to the first thread 16 of the complete thread portion 18 and whose diameter becomes smaller toward the tip in the axial direction. It is composed of the formed biting portion 22. As can be seen from FIG. 3, the threaded portion 14 is provided with three projecting portions 24 at equidistant intervals in the circumferential direction, and intermediate portions of the projecting portions 24 are formed as relief portions 26. The protrusion 24 is used for forming the internal thread by raising.
【００１０】 この盛上げタップ１０は、雌ねじ成形状態の断面を示す図１から明らかなよう に、被加工物３２に設けられた有底の下穴３４に雌ねじ３６を成形するためのも のであり、食付き部２２側から下穴３４内にねじ込まれることにより、主として 食付き部２２の第２ねじ山２０により下穴３４の内壁表層部を塑性変形させて雌 ねじ３６のねじ山を形作るようになっている。また、この被加工物３２の下穴３ ４の底部には突起４０が存在しており、この突起４０と干渉することなく雌ねじ 加工を行うために、上記食付き部２２の先端面２８には部分円錐形状の逃げ穴３ ０が設けられている。As is apparent from FIG. 1 showing a cross section of the internal thread forming state, the build-up tap 10 is for forming the internal thread 36 in the bottomed prepared hole 34 provided in the workpiece 32. By being screwed into the pilot hole 34 from the side of the bited portion 22, the inner surface layer of the inner wall of the pilot hole 34 is plastically deformed mainly by the second thread 20 of the bited portion 22 to form the thread of the female screw 36. Has become. Further, there is a protrusion 40 at the bottom of the prepared hole 34 of the workpiece 32, and in order to perform internal thread processing without interfering with the protrusion 40, the tip surface 28 of the bite part 22 is formed. An escape hole 30 having a partially conical shape is provided.
【００１１】 ここで、食付き部２２の第２ねじ山２０は、その外径および有効径については それぞれ軸方向の先端に向かう程径寸法が小さくなるが、谷径については完全山 部１８における第１ねじ山１６の谷径と等しい一定の径寸法とされている。具体 的には、第２ねじ山２０の山頂は図１において軸心に対して傾斜した直線Ｌに沿 って低くなるように形成されているが、第２ねじ山２０の谷底は、完全山部１８ の第１ねじ山１６の谷底と同じ一定の径寸法ｄで形成されている。このため、食 付き部２２の先端面２８に突起４０に対応する大きな逃げ穴３０が設けられてい るにも拘らず、食付き部２２の先端側の部分における谷底から逃げ穴３０までの 肉厚が薄肉とならず、被加工物３２の塑性変形に伴う比較的大きな径方向の負荷 に対して必要な強度が確保される。また、大きな逃げ穴３０が設けられることに より、突起４０と干渉することなく下穴３４の奥深くまで盛上げタップ１０をね じ込むことが可能となり、予め定められた雌ねじ３６の有効ねじ長さＡを確保し つつ食付き部２２の軸方向の長さ寸法Ｂを大きくできる。The outer diameter and the effective diameter of the second thread 20 of the chamfered portion 22 become smaller toward the tip in the axial direction. It has a constant diameter dimension equal to the root diameter of the first screw thread 16. Specifically, the crest of the second screw thread 20 is formed to be lower along the straight line L inclined with respect to the axis in FIG. 1, but the root of the second screw thread 20 is a perfect mountain. It is formed with the same constant diameter dimension d as the root of the first thread 16 of the portion 18. Therefore, although the large clearance hole 30 corresponding to the protrusion 40 is provided on the tip surface 28 of the bite portion 22, the thickness from the valley bottom to the clearance hole 30 at the tip side of the bite portion 22 is large. Does not become thin, and the required strength is secured against a relatively large radial load due to the plastic deformation of the workpiece 32. In addition, since the large relief hole 30 is provided, it is possible to screw the raising tap 10 deep into the prepared hole 34 without interfering with the protrusion 40, and the effective screw length A of the predetermined internal thread 36 is set. It is possible to increase the axial length B of the bited portion 22 while ensuring the above.
【００１２】 このように、本実施例の盛上げタップ１０によれば、食付き部２２の先端側部 分の強度を十分に確保しつつ、その食付き部２２の先端面２８に大きな逃げ穴３ ０を形成できるため、被加工物３２の下穴３４の奥深くまで盛上げタップ１０を 食い込ませることが可能で、雌ねじ３６の有効ねじ長さＡを確保しつつ食付き部 ２２の軸方向長さＢが十分に得られて第２ねじ山２０の１山当たりの負荷が軽減 され、精度の高い雌ねじを安定して加工できるようになるとともに、盛上げタッ プ１０の寿命が向上させられる。As described above, according to the raising tap 10 of the present embodiment, the large clearance hole 3 is formed in the tip surface 28 of the biting portion 22 while sufficiently securing the strength of the tip side portion of the biting portion 22. Since it is possible to form 0, it is possible to bite the raised tap 10 deeply into the prepared hole 34 of the workpiece 32, and to secure the effective screw length A of the female screw 36, and the axial length B of the bite part 22. Is sufficiently obtained, the load per one thread of the second thread 20 is reduced, a highly accurate internal thread can be stably processed, and the life of the build-up tap 10 is improved.
【００１３】 以上、本考案の一実施例を図面に基づいて詳細に説明したが、本考案は他の態 様で実施することもできる。Although one embodiment of the present invention has been described in detail above with reference to the drawings, the present invention can be implemented in other modes.
【００１４】 例えば、前述の実施例においては、食付き部２２における第２ねじ山２０の谷 径が完全山部１８における第１ねじ山１６の谷径と等しい一定の径寸法ｄとされ ていたが、第２ねじ山２０の谷径は、雌ねじ３６の成形後に盛上げタップ１０を その成形された雌ねじ３６のねじ山と干渉することなく抜き出すことができれば よいので、成形される雌ねじ３６の内径寸法よりも小さい範囲で食付き部２２先 端の必要強度を考慮して適宜定めることができるとともに、軸方向において僅か に変化していても差支えない。For example, in the above-described embodiment, the root diameter of the second screw thread 20 in the chamfered portion 22 is set to a constant diameter dimension d which is equal to the root diameter of the first screw thread 16 in the complete ridge portion 18. However, since the root diameter of the second screw thread 20 is such that the raised tap 10 can be extracted without interfering with the thread of the formed female screw 36 after the formation of the female screw 36, the inner diameter dimension of the formed female screw 36. It can be appropriately determined in consideration of the required strength of the tip of the bite part 22 in a smaller range, and it may be slightly changed in the axial direction.
【００１５】 また、前述の実施例においては、ねじ部１４は図３において周方向の３箇所に 突出部２４を備えていたが、突出部２４の数は適宜変更することが可能であると ともに、１ピッチ当たりの数は必ずしも整数でなくても良い。Further, in the above-described embodiment, the screw portion 14 is provided with the projecting portions 24 at three positions in the circumferential direction in FIG. 3, but the number of the projecting portions 24 can be changed appropriately. The number per pitch does not necessarily have to be an integer.
【００１６】 その他一々例示はしないが、本考案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 not illustrated one by one, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art.
【図１】図２の先端逃げ穴付き盛上げタップによるねじ
成形状態を示す断面図である。FIG. 1 is a cross-sectional view showing a thread-formed state by the build-up tap with a clearance hole at the tip of FIG.
【図２】本考案の一実施例である先端逃げ穴付き盛上げ
タップの正面図である。FIG. 2 is a front view of a build-up tap with a tip clearance hole according to an embodiment of the present invention.
【図３】図２の盛上げタップの先端側からの視図であ
る。FIG. 3 is a view from the tip side of the build-up tap of FIG.
【図４】従来の先端逃げ穴付き盛上げタップによるねじ
成形状態の一例を示す図である。FIG. 4 is a diagram showing an example of a thread-formed state by a conventional tap with a clearance hole at the tip.
【図５】従来の先端逃げ穴付き盛上げタップによるねじ
成形状態の別の一例を示す図である。FIG. 5 is a view showing another example of a thread-formed state by a conventional build-up tap with a clearance hole at the tip.
【図６】本考案の先端逃げ穴付き盛上げタップを用いて
雌ねじが好適に加工される被加工物の一例を示す図であ
る。FIG. 6 is a view showing an example of a work piece in which an internal thread is preferably processed using the raised tap with a clearance hole of the present invention.
１０：先端逃げ穴付き盛上げタップ １６：第１ねじ山 １８：完全山部 ２０：第２ねじ山 ２２：食付き部 ２８：先端面 ３０：逃げ穴 ３２：被加工物 ３４：下穴 ３６：雌ねじ ４０：突起 10: Raised tap with tip clearance hole 16: 1st screw thread 18: Complete thread portion 20: 2nd screw thread 22: Bited portion 28: Tip surface 30: Relief hole 32: Workpiece 34: Pilot hole 36: Female thread 40: Protrusion
Claims (1)
完全山部と、該完全山部の第１ねじ山に連続して設けら
れるとともに軸方向の先端に向かう程径寸法が小さくな
る第２ねじ山が形成された食付き部と、該食付き部の先
端面に設けられた逃げ穴とを備え、被加工物に設けられ
た有底の下穴内に前記食付き部側からねじ込まれること
により、該下穴の底部に存在する突起と干渉することな
く該下穴の内壁表層部を塑性変形させて雌ねじを成形す
る先端逃げ穴付き盛上げタップにおいて、 前記食付き部の第２ねじ山を、その外径および有効径に
ついてはそれぞれ軸方向の先端に向かう程径寸法が小さ
くなるが、谷径については前記完全山部における第１ね
じ山の谷径と略等しい略一定の径寸法としたことを特徴
とする先端逃げ穴付き盛上げタップ。1. A complete ridge portion having a first screw thread having the same diametrical dimension, and a diametrical dimension which is provided continuously to the first screw ridge of the complete ridge portion and which becomes smaller toward the tip in the axial direction. It is provided with a chamfer having a second screw thread and an escape hole provided at the tip surface of the chamfer, and is screwed into the prepared bottomed hole provided in the workpiece from the side of the chamfer. By forming a female screw by plastically deforming the inner wall surface layer portion of the pilot hole without interfering with the projection existing at the bottom of the pilot hole, a build-up tap with a tip clearance hole, the second screw of the bite portion Regarding the outer diameter and the effective diameter of the crest, the diameter decreases toward the tip in the axial direction, but the trough diameter is substantially the same as the trough diameter of the first screw thread in the complete crest portion. The raised tab with the relief hole at the tip Flop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992037972U JP2574380Y2 (en) | 1992-05-11 | 1992-05-11 | Tip tap with relief hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992037972U JP2574380Y2 (en) | 1992-05-11 | 1992-05-11 | Tip tap with relief hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0588836U true JPH0588836U (en) | 1993-12-03 |
| JP2574380Y2 JP2574380Y2 (en) | 1998-06-11 |
Family
ID=12512483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992037972U Expired - Fee Related JP2574380Y2 (en) | 1992-05-11 | 1992-05-11 | Tip tap with relief hole |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2574380Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020097100A (en) * | 2018-10-29 | 2020-06-25 | エミューゲ ヴェルク リチャード グリンペル ゲーエムベーハー ウント カンパニー ケージー ファブリック ファープレーツィシオンスヴェルクツォイゲ | Thread former having flaring ridges |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120131020A (en) * | 2011-05-24 | 2012-12-04 | 김영좌 | Thread rolling tap |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52130292U (en) * | 1976-03-31 | 1977-10-04 |
-
1992
- 1992-05-11 JP JP1992037972U patent/JP2574380Y2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52130292U (en) * | 1976-03-31 | 1977-10-04 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020097100A (en) * | 2018-10-29 | 2020-06-25 | エミューゲ ヴェルク リチャード グリンペル ゲーエムベーハー ウント カンパニー ケージー ファブリック ファープレーツィシオンスヴェルクツォイゲ | Thread former having flaring ridges |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2574380Y2 (en) | 1998-06-11 |
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