JP4644448B2 - Tap - Google Patents

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Publication number
JP4644448B2
JP4644448B2 JP2004203396A JP2004203396A JP4644448B2 JP 4644448 B2 JP4644448 B2 JP 4644448B2 JP 2004203396 A JP2004203396 A JP 2004203396A JP 2004203396 A JP2004203396 A JP 2004203396A JP 4644448 B2 JP4644448 B2 JP 4644448B2
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tap
blade
female screw
screw
blade portion
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JP2006021294A (en
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重信 濱中
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HAMANAKA NUT MFG. CO.,LTD.
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HAMANAKA NUT MFG. CO.,LTD.
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Description

本発明はタップに関し、特にワーク、例えばナットに対して同一ピッチの大きいサイズの雌ねじに再タップ加工するのに適したタップに関する。   The present invention relates to a tap, and more particularly to a tap suitable for re-tapping a large-sized female screw having the same pitch with respect to a workpiece, for example, a nut.

ワークを加工する場合、加工の種類に応じて種々の工具が用いられる。例えば、ドリルを用いてワークに孔を穿孔し、ドリルで穿孔された穴を下孔とし、これをリーマを用いて所望の寸法精度に仕上げ、あるいはドリルで穿孔された下孔にタップを用いて雌ねじをタップ加工することが行われている。 When machining a workpiece, various tools are used depending on the type of machining. For example, a hole is drilled in a workpiece using a drill, the hole drilled is used as a pilot hole, and this is finished to a desired dimensional accuracy using a reamer, or a tap is used on the drilled drill hole. Tapping a female screw is performed.

かかる工具に関し、1つの工具に種類の異なる切刃を形成することが提案されている。例えば、軸部の先端側にタップ刃を、その後方にリーマ刃を形成したリーマ付きタップ(特許文献1)、隣接するタップ刃の間にリーマ刃を形成しあるいはタップ刃の前半部分にリーマ刃を形成したリーマ付きタップ(特許文献2)、タップ刃の前方にリーマ刃及びドリル刃を形成したタップ(特許文献3)、等が知られている。
実公平06−18743号公報 実開昭64−30123号公報 特開2001−18119号公報
With regard to such a tool, it has been proposed to form different types of cutting edges in one tool. For example, a tap with a reamer in which a tap blade is formed on the tip side of the shaft portion and a reamer blade on the rear side (Patent Document 1), a reamer blade is formed between adjacent tap blades, or a reamer blade in the first half of the tap blade A tap with a reamer (Patent Document 2), a tap with a reamer blade and a drill blade formed in front of the tap blade (Patent Document 3), and the like are known.
Japanese Utility Model Publication No. 06-18743 Japanese Utility Model Publication No. 64-30123 JP 2001-18119 A

ところで、既にタップ加工されたワーク、例えばナットに対して同一ピッチの大きいサイズ(オーバーサイズ)に再タップする場合、ナットのねじ穴をリーマ加工してからタップ加工し、さらにリーマ加工してバリを除去することが行われている。   By the way, when re-tapping to a large size (oversize) of the same pitch with respect to a workpiece that has already been tapped, for example, reaming the screw hole of the nut, tapping, and then reaming to remove the burr It has been done to remove.

しかし、リーマ加工後にタップ加工をすると、ピッチずれを起こしやすく、二条ねじになってしまうことがあった。   However, when tapping is performed after reamer processing, pitch deviation is likely to occur, resulting in a double thread.

本発明は、かかる問題点に鑑み、既にタップ加工されたワークに対して同一ピッチのオーバーサイズに正確に再タップ加工できるようにしたタップを提供することを課題とする。   In view of such problems, an object of the present invention is to provide a tap that can be accurately re-tapped to an oversize of the same pitch with respect to an already tapped workpiece.

そこで本発明に係るタップは、雌ねじがタップ加工されたワークに対して同一ピッチでねじ径の大きい雌ねじを再タップ加工するのに用いられるタップであって、先端側部分には喰付き部のないタップ刃部が、該タップ刃の後方にはリーマ刃部が形成されており、上記タップ刃部は上記ワークの雌ねじのピッチと同一のピッチでねじ径の大きな刃を有する一方、上記リーマ刃部は上記大きい寸法の雌ねじの内径と等しい外径の刃を有することを特徴とする。   Therefore, the tap according to the present invention is a tap used for re-tapping a female screw having a large screw diameter at the same pitch with respect to a work on which the female screw has been tapped, and the tip side portion has no biting portion. The tap blade portion is formed with a reamer blade portion behind the tap blade, and the tap blade portion has a blade having a large screw diameter at the same pitch as the internal thread pitch of the workpiece, while the reamer blade portion. Has a blade having an outer diameter equal to the inner diameter of the female screw having the larger dimension.

本発明の特徴の1つは喰付き部のないタップ刃部の後方にリーマ刃部を形成するようにした点にある。   One of the features of the present invention is that a reamer blade portion is formed behind a tap blade portion without a biting portion.

これにより、タップ刃部がワークの既設の雌ねじに回転されながら押し込まれると、ワークの既設の雌ねじにはタップ刃部がピッタリと嵌まりながらピッチ送りされ、同一ピッチでねじ径の大きな雌ねじが2条ねじになることなく、タップ加工される。タップ加工された大きい寸法の雌ねじはリーマ刃部によってタップ加工時のバリが除去されるので、雌ねじを高い精度に再タップ加工することができる。   As a result, when the tap blade portion is pushed into the existing female screw of the workpiece while being rotated, the tap blade portion is fitted to the existing female screw of the workpiece, and the tap blade portion is fitted into the pitch, so that two female screws having the same pitch and a large screw diameter are provided. It is tapped without becoming a thread. Since the burrs at the time of tapping are removed by the reamer blade portion of the tapped large-sized female screw, the female screw can be re-tapped with high accuracy.

また、本発明では1つの工具にタップ刃部とリーマ刃部を形成しているので、タップ加工とリーマ加工とを別々の工具で行う場合に比して短時間で加工を行うことができる。   Further, in the present invention, since the tap blade portion and the reamer blade portion are formed on one tool, the machining can be performed in a shorter time than when tapping and reamer machining are performed with separate tools.

タップ刃部の喰付き部を除去したが、これに代えて雄ねじを有する案内部を形成するようにしてもよい。   Although the biting portion of the tap blade portion is removed, a guide portion having a male screw may be formed instead.

即ち、本発明に係るタップは、雌ねじがタップ加工されたワークに対して同一ピッチでねじ径の大きな雌ねじを再タップ加工するのに用いられるタップであって、先端側部分には案内部が、該案内部の後方にはタップ刃部が、該タップ刃部の後方にリーマ刃部が形成されており、上記案内部には上記ワークの既設の雌ねじと噛み合う雄ねじが形成され、上記タップ刃部は上記ワークの雌ねじのピッチと同一のピッチでねじ径の大きな刃を有する一方、上記リーマ刃部は上記大きい寸法の雌ねじの内径と等しい外径の刃を有することを特徴とする。   That is, the tap according to the present invention is a tap used for re-tapping a female screw having a large screw diameter at the same pitch with respect to a work on which the female screw has been tapped, and a guide portion is provided at a tip side portion. A tap blade portion is formed at the rear of the guide portion, and a reamer blade portion is formed at the rear of the tap blade portion, and a male screw that meshes with an existing female screw of the workpiece is formed on the guide portion, and the tap blade portion Has a blade with a large screw diameter at the same pitch as the female screw pitch of the workpiece, while the reamer blade portion has a blade with an outer diameter equal to the inner diameter of the female screw of the large dimension.

このように、タップ刃部の前方にワークの既設の雌ねじと噛合する雄ねじを有する案内部を設けると、タップ刃部をワークの既設の雌ねじに対してより高い精度でピッチ送りすることができ、高精度に再タップ加工することができる。   In this way, when the guide portion having the male screw meshing with the existing female screw of the workpiece is provided in front of the tap blade portion, the tap blade portion can be pitch-fed with higher accuracy with respect to the existing female screw of the workpiece, Re-tapping can be performed with high accuracy.

再タップ加工後のリーマ加工は別工程で行うようにしてもよい。即ち、本発明に係るタップは、雌ねじがタップ加工されたワークに対して同一ピッチでねじ径の大きな雌ねじを再タップ加工するのに用いられるタップであって、先端側部分には案内部が、該案内部の後方にはタップ刃部が形成されており、上記案内部には上記ワークの既設の雌ねじと噛み合う雄ねじが形成され、上記タップ刃部は上記ワークの雌ねじのピッチと同一のピッチでねじ径の大きな刃を有することを特徴とする。   The reaming after the re-tapping may be performed in a separate process. That is, the tap according to the present invention is a tap used for re-tapping a female screw having a large screw diameter at the same pitch with respect to a work on which the female screw is tapped, and a guide portion is provided at a tip side portion. A tap blade portion is formed behind the guide portion, a male screw that meshes with an existing female screw of the workpiece is formed on the guide portion, and the tap blade portion has the same pitch as the pitch of the female screw of the workpiece. It has a blade with a large screw diameter.

以下、本発明を図面に示す具体例に基づいて詳細に説明する。図1及び図2は本発明に係るタップの好ましい実施形態を示す。図において、タップ10は先端側部分にタップ刃部11が、タップ刃部11の後方にリーマ刃部12が形成されている。   Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 and 2 show a preferred embodiment of a tap according to the present invention. In the figure, the tap 10 has a tap blade portion 11 formed at the tip end portion and a reamer blade portion 12 formed behind the tap blade portion 11.

タップ刃部11には先端の喰付き部が設けられておらず、又タップ刃部11にはワークの既設の雌ねじのピッチと等しいピッチPで既設の雌ねじよりも大きなねじ外径寸法t1及びねじ内径寸法t2の刃が形成されている。   The tap blade portion 11 is not provided with a chamfered portion at the tip, and the tap blade portion 11 has a screw outer diameter t1 and a screw larger than the existing female screw at a pitch P equal to the pitch of the existing female screw of the workpiece. A blade having an inner diameter dimension t2 is formed.

他方、リーマ刃部12は大きい寸法の雌ねじの内径、即ちタップ刃部11の刃の内径寸法t2と等しい外径の刃が設けられている。   On the other hand, the reamer blade portion 12 is provided with a blade having an outer diameter equal to the inner diameter of a large-sized female screw, that is, the inner diameter dimension t2 of the blade of the tap blade portion 11.

例えば、雌ねじを刻設したナットに、同一ピッチで大きな寸法の雌ねじを再タップする場合、本例のタップ10を回転させながら、その先端側からナットのねじ穴に押し込んで行く。   For example, when tapping a female screw of a large size at the same pitch on a nut engraved with a female screw, the tap 10 of this example is pushed into the screw hole of the nut from its tip side while rotating.

すると、タップ刃部11の先端に喰付き部が形成されていないので、タップ刃部11はナットの既設の雌ねじにピッタリと嵌まりながらピッチ送りされ、ナットには同一ピッチで大きな寸法の雌ねじが2条ねじになることなくタップ加工される。   Then, since the biting portion is not formed at the tip of the tap blade portion 11, the tap blade portion 11 is pitch-fitted while being fitted to the existing female screw of the nut, and the nut has a large-sized female screw at the same pitch. It is tapped without becoming a double thread.

タップ加工された大きい寸法の雌ねじは次にリーマ刃部12によってタップ加工時のバリが除去される。その結果、ナットには雌ねじが高い精度に再タップ加工されることとなる。   Next, the burrs at the time of tapping are removed from the tapped large-sized female screw by the reamer blade portion 12. As a result, the internal thread of the nut is re-tapped with high accuracy.

また、1つの工具にタップ刃部11とリーマ刃部12とが形成されているので、タップ加工とリーマ加工とを別々の工具で行う場合に比して短時間で加工を行うことができる。   Moreover, since the tap blade part 11 and the reamer blade part 12 are formed in one tool, it can process in a short time compared with the case where a tap process and a reamer process are performed with a separate tool.

図3は第2の実施形態を示し、図において図1と同一符号は同一又は相当部分を示す。本例では先端側部分に案内部13が、該案内部13の後方にはタップ刃部11が、該タップ刃部11の後方にリーマ刃部12が形成され、又案内部13にはワークの既設の雌ねじと噛み合う雄ねじが形成されている。   FIG. 3 shows a second embodiment. In the figure, the same reference numerals as those in FIG. In this example, a guide portion 13 is formed at the tip end portion, a tap blade portion 11 is formed behind the guide portion 13, a reamer blade portion 12 is formed behind the tap blade portion 11, and the guide portion 13 has a work piece. A male screw that meshes with an existing female screw is formed.

雌ねじを刻設したナットに、同一ピッチで大きな寸法の雌ねじを再タップする場合、本例のタップ10を回転させながら、その先端側からナットのねじ穴に押し込んで行く。   When re-tapping a female screw of a large size at the same pitch on a nut engraved with a female screw, the tap 10 of this example is pushed into the screw hole of the nut from its tip side while rotating.

すると、案内部13がナットの既設の雌ねじとピッタリと噛み合ってピッチ送りされ、タップ刃部11もナットの既設の雌ねじにピッタリと嵌まりながらピッチ送りされ、ナットには同一ピッチで大きな寸法の雌ねじが2条ねじになることなく高い精度でタップ加工されることとなる。   Then, the guide portion 13 meshes with the existing female screw of the nut and is pitch-fed, and the tap blade portion 11 is also pitch-fitted while being fitted to the existing female screw of the nut, and the nut has the same pitch and a large size female screw. Will be tapped with high accuracy without becoming a double thread.

図4は第3の実施形態を示し、図において図1と同一符号は同一又は相当部分を示す。本例では先端側部分に案内部13が、該案内部13の後方にはタップ刃部11が形成されているが、タップ刃部11の後方にはリーマ刃部が形成されていない。   FIG. 4 shows a third embodiment. In the figure, the same reference numerals as those in FIG. In this example, the guide portion 13 is formed at the tip end portion and the tap blade portion 11 is formed behind the guide portion 13, but the reamer blade portion is not formed behind the tap blade portion 11.

本例ではタップ刃部11によって再タップ加工がなされた後、別工程でリーマを用いてリーマ加工を行う。   In this example, after re-tapping is performed by the tap blade portion 11, reaming is performed using a reamer in a separate process.

本発明に係るタップの好ましい実施形態を示す側面図である。It is a side view which shows preferable embodiment of the tap which concerns on this invention. 上記実施形態における断面図である。It is sectional drawing in the said embodiment. 第2の実施形態を示す側面図である。It is a side view which shows 2nd Embodiment. 第3の実施形態を示す側面図である。It is a side view which shows 3rd Embodiment.

符号の説明Explanation of symbols

10 タップ
11 タップ刃部
12 リーマ刃部
13 案内部
10 Tap 11 Tap Blade 12 Reamer Blade 13 Guide

Claims (2)

雌ねじがタップ加工されたワークに対して同一ピッチでねじ径の大きい雌ねじを再タップ加工するのに用いられるタップであって、
先端側部分には喰付き部のないタップ刃部が形成され、該タップ刃の後方には上記タップ刃によってタップ加工された雌ねじを同一方向の回転によってリーマ加工するリーマ刃部が形成されており、
上記タップ刃部は上記ワークの雌ねじのピッチと同一のピッチでねじ径の大きな刃を有する一方、
上記リーマ刃部は上記大きい寸法の雌ねじの内径と等しい外径の刃を有することを特徴とするタップ。
A tap used for re-tapping a female screw having a large screw diameter at the same pitch with respect to a work on which a female screw has been tapped,
A tap blade portion without a biting portion is formed on the tip side portion, and a reamer blade portion for reaming a female screw tapped by the tap blade by rotation in the same direction is formed behind the tap blade. ,
While the tap blade portion has a blade having a large screw diameter at the same pitch as the female screw pitch of the workpiece,
The tap characterized in that the reamer blade portion has a blade having an outer diameter equal to the inner diameter of the female screw having the large dimension.
雌ねじがタップ加工されたワークに対して同一ピッチでねじ径の大きな雌ねじを再タップ加工するのに用いられるタップであって、
先端側部分には案内部が形成され、該案内部の後方にはタップ刃部が形成され、該タップ刃部の後方に上記タップ刃によってタップ加工された雌ねじを同一方向の回転によってリーマ加工するリーマ刃部が形成されており、
上記案内部には上記ワークの既設の雌ねじと噛み合う雄ねじが形成され、
上記タップ刃部は上記ワークの雌ねじのピッチと同一のピッチでねじ径の大きな刃を有する一方、
上記リーマ刃部は上記大きい寸法の雌ねじの内径と等しい外径の刃を有することを特徴とするタップ。
A tap used for re-tapping a female screw having a large screw diameter at the same pitch with respect to a work tapped with a female screw,
A guide portion is formed at the distal end side portion, a tap blade portion is formed behind the guide portion, and a female thread tapped by the tap blade behind the tap blade portion is reamed by rotation in the same direction. A reamer blade is formed,
The guide portion is formed with a male screw that meshes with an existing female screw of the workpiece,
While the tap blade portion has a blade having a large screw diameter at the same pitch as the female screw pitch of the workpiece,
The tap characterized in that the reamer blade portion has a blade having an outer diameter equal to the inner diameter of the female screw having the large dimension.
JP2004203396A 2004-07-09 2004-07-09 Tap Expired - Lifetime JP4644448B2 (en)

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JP4644448B2 true JP4644448B2 (en) 2011-03-02

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4330041Y1 (en) * 1966-01-06 1968-12-09
JPS573526U (en) * 1980-06-10 1982-01-09
JPS62174829U (en) * 1986-04-25 1987-11-06
JPS6350615U (en) * 1986-09-18 1988-04-06
JPH09155640A (en) * 1995-10-02 1997-06-17 Tanoi Seisakusho:Kk Cold forming tap
JP2001138138A (en) * 1999-11-18 2001-05-22 Sakai Seiko Kk Cold forming nut tap with cutting step
JP2004003475A (en) * 2002-05-20 2004-01-08 Newfrey Llc Method, kit and insert for replacing damaged screw

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4330041Y1 (en) * 1966-01-06 1968-12-09
JPS573526U (en) * 1980-06-10 1982-01-09
JPS62174829U (en) * 1986-04-25 1987-11-06
JPS6350615U (en) * 1986-09-18 1988-04-06
JPH09155640A (en) * 1995-10-02 1997-06-17 Tanoi Seisakusho:Kk Cold forming tap
JP2001138138A (en) * 1999-11-18 2001-05-22 Sakai Seiko Kk Cold forming nut tap with cutting step
JP2004003475A (en) * 2002-05-20 2004-01-08 Newfrey Llc Method, kit and insert for replacing damaged screw

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