JP2733050B2 - Roll tap for female thread processing - Google Patents
Roll tap for female thread processingInfo
- Publication number
- JP2733050B2 JP2733050B2 JP13174896A JP13174896A JP2733050B2 JP 2733050 B2 JP2733050 B2 JP 2733050B2 JP 13174896 A JP13174896 A JP 13174896A JP 13174896 A JP13174896 A JP 13174896A JP 2733050 B2 JP2733050 B2 JP 2733050B2
- Authority
- JP
- Japan
- Prior art keywords
- roll
- tap
- ridges
- rolls
- outer 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 - Fee Related
Links
Landscapes
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Forging (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、主として工業的に
生産されるナット等のめねじ加工を行うためのロールタ
ップに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll tap for processing an internally threaded nut or the like mainly produced industrially.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】一般
に、ナット等のめねじの加工にはタップが使用されてい
る。このタップは、めねじ部を順次拡大切削していく方
式であって、先端が細いめねじ形状でねじリードを有
し、外周部に軸に沿って数本の溝を設けて切刃とした形
状をしている。2. Description of the Related Art In general, taps are used for machining female threads such as nuts. This tap is a method of sequentially expanding and cutting the internal thread part, has a female lead with a thin female thread shape at the tip, and provides several grooves along the axis on the outer peripheral part as a cutting edge It has a shape.
【０００３】しかして、このタップによってナット等の
めねじを加工する場合には、ワークと上記タップのいず
れか一方を回転させながら軸線方向に移動させることに
よって、ワークの内面にめねじを切削により加工するこ
とができる。[0003] When a female thread such as a nut is machined with this tap, one of the tap and the above-mentioned tap is rotated in the axial direction while rotating, so that the internal thread of the workpiece is cut by cutting. Can be processed.
【０００４】しかしながら、このような切削加工による
めねじ加工は切削タップによって金属組織のファイバー
フローを切断しているため強度が低下し、また生産効率
が低い等の問題がある。[0004] However, such internal thread processing by cutting involves problems such as a decrease in strength and a low production efficiency because the fiber flow of the metal structure is cut by the cutting tap.
【０００５】一方、一部に盛上げタップ（通称転造タッ
プ）も使用されているが、これは転造ではなく擦造とで
も言うべきもので、無理な塑性変形によりめねじを盛上
げる方式であって、加工の際には極めて高いトルクを必
要とし、工具消耗が激しく、ねじフランク面の表面粗さ
が悪い等の問題がある。On the other hand, a tapping tap (commonly referred to as a rolling tap) is also used in part, but this is not a rolling but a rubbing. It is a method of raising a female thread by excessive plastic deformation. Therefore, there is a problem in that extremely high torque is required during machining, tool wear is severe, and the surface roughness of the screw flank surface is poor.
【０００６】このように、現在おねじ加工はロール又は
平ダイス等による高効率の転造方式が主流であるのに対
して、めねじ加工は相変らず切削加工方式が主流であっ
て、上述の如き問題点を有している。As described above, at present, the high-efficiency rolling method using a roll or a flat die is mainly used for the external thread processing, whereas the cutting method is still the mainstream for the internal thread processing. It has the following problems.
【０００７】本発明はこのような点に鑑み、めねじ加工
をロールによる転造方式によって行うことができるロー
ルタップを得ることを目的とする。SUMMARY OF THE INVENTION In view of the foregoing, an object of the present invention is to provide a roll tap capable of performing internal thread processing by a rolling method using a roll.
【０００８】[0008]
【課題を解決するための手段】本発明は、外周面に周方
向に延び１ピッチ毎にそれぞれ独立した断面ねじ山状の
複数の突条を有し、その突条の外径が先端部より順次大
きくなるように形成された数本のロールを、互いに平行
に且つ同一円周上にそれぞれ回転可能に配設したことを
特徴とする。SUMMARY OF THE INVENTION The present invention has a plurality of ridges extending in the circumferential direction on the outer peripheral surface and each having a thread-shaped cross section which is independent at every pitch, and the outer diameter of the ridge is greater than that of the tip. It is characterized in that several rolls formed so as to be sequentially larger are rotatably arranged in parallel with each other and on the same circumference.
【０００９】また、第２の発明は、ロールの外周面に先
端部より順次外径が大きくなるように形成された複数の
突条の後方側には、同一外径を有する複数の突条が配列
されていることを特徴とする。According to a second aspect of the present invention, a plurality of ridges having the same outer diameter are provided on the rear side of the plurality of ridges formed on the outer peripheral surface of the roll so that the outer diameter is gradually increased from the leading end. It is characterized by being arranged.
【００１０】さらに、第３の発明は、同一円周上にｎ個
のロールを配設した場合、各ロールの突条が隣接するロ
ールの突条に対して１／ｎピッチづつ軸方向に順次位相
がずらされていることを特徴とする。Further, according to a third aspect of the present invention, when n rolls are arranged on the same circumference, the ridges of each roll are sequentially arranged in the axial direction by 1 / n pitch with respect to the ridges of the adjacent roll. The phase is shifted.
【００１１】[0011]
【発明の実施の形態】以下、添付図面を参照して本発明
の実施の形態について説明する。図１及び図２において
符号１はねじ加工用ロールタップのロールが収容される
ロールハウジングであって、そのロールハウジング１の
外面には軸線方向に延びる３個の凹所２ａ，２ｂ，２ｃ
が周方向に等間隔に形成されており、各凹所２ａ，２
ｂ，２ｃ内にそれぞれロール３ａ，３ｂ，３ｃが配設さ
れている。Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 and 2, reference numeral 1 denotes a roll housing for accommodating a roll of a threading roll tap. The outer surface of the roll housing 1 has three recesses 2a, 2b, 2c extending in the axial direction.
Are formed at equal intervals in the circumferential direction, and each recess 2a, 2
Rolls 3a, 3b, 3c are arranged in b, 2c, respectively.
【００１２】上記ロールハウジング１の両端にはそれぞ
れロールリテーナー４ａ，４ｂが配設され、その両端に
各ロール３ａ，３ｂ，３ｃの両端の軸部５ａ，５ｂがそ
れぞれ軸支され、上記ロールリテーナー４ａの先端にト
ッププレート６が配設され、さらにロールリテーナー４
ｂの後端にホルダー７が配設され、上記トッププレート
７、ロールリテーナー４ａ、ロールハウジング１、ロル
リテーナー４ｂ及びホルダー７が３本の組付ボルト８に
よって一体に連結給合されている。Roll retainers 4a and 4b are provided at both ends of the roll housing 1, respectively, and shaft portions 5a and 5b at both ends of the rolls 3a, 3b and 3c are respectively supported at both ends thereof. The top plate 6 is disposed at the tip of the roll retainer 4.
A holder 7 is provided at the rear end of the b, and the top plate 7, the roll retainer 4a, the roll housing 1, the roll retainer 4b, and the holder 7 are integrally connected and supplied by three assembling bolts 8.
【００１３】図３は、上記各ロール３ａ，３ｂ，３ｃの
側面図であって、そのロール３ａの外周面には周方向に
延びた１ピッチ毎にそれぞれ独立した断面ねじ山状の複
数の突条１０が形成してある。上記突条１０の外径は線
Ａに示すようにロール３ａの先端部より順次大きくなる
ように形成され、後端側の４本の突条１０の外径は同一
とされ完成山部１０ａとしてある。そして、図１に示す
ように、上記各ロール３ａ，３ｂ，３ｃをロールハウジ
ング１に装着した場合、各ロール３ａ，３ｂ，３ｃにお
ける各突条１０によって形成される谷部の内周に外接す
る仮想円がロールハウジング１の外径より大きいように
してある。FIG. 3 is a side view of each of the rolls 3a, 3b and 3c. The outer peripheral surface of the roll 3a has a plurality of protrusions each having a thread-shaped cross section which are extended in the circumferential direction and are independent at every pitch. Article 10 is formed. The outer diameter of the ridge 10 is formed so as to be gradually larger than the leading end of the roll 3a as shown by the line A, and the outer diameters of the four ridges 10 on the rear end side are the same, and the finished ridge 10a is formed. is there. As shown in FIG. 1, when the rolls 3a, 3b, 3c are mounted on the roll housing 1, the rolls 3a, 3b, 3c circumscribe the inner periphery of the valley formed by the ridges 10 on the rolls 3a, 3b, 3c. The virtual circle is larger than the outer diameter of the roll housing 1.
【００１４】ところで、図１に示すように各ロール３ａ
（３ｂ，３ｃ）の軸部５ａとトッププレート６、及び軸
部５ｂとホルダー７との間にはスペーサ１１ａ，１１ｃ
が介装してある。By the way, as shown in FIG.
Spacers 11a and 11c are provided between the shaft 5a and the top plate 6 of (3b, 3c) and between the shaft 5b and the holder 7, respectively.
Is interposed.
【００１５】すなわち、本実施の形態のロールタップは
３本のロール３ａ，３ｂ，３ｃで１個のめねじを成形す
るため、めねじの１ピッチの１／３づつ厚さを変えたス
ペーサ１１ａ，１１ｂ，１１ｃを２組づつ用意してお
き、上述のように例えばロール３ａの軸部５ａ側には一
番厚いスペーサ１１ａを介装し、軸部５ｂ側には一番薄
いスペーサ１１ｃが介装されている。そして、ロール３
ｂの両軸部５ａ，５ｂの両端側には中間の厚さのスペー
サ１１ｂがそれぞれ介装され、さらにロール３ｃの軸部
５ａ側には最も薄いスペーサ１１ｃが介装され、軸部５
ｂ側には最も厚いスペーサ１１ａが介装され、各ロール
３ａ，３ｂ，３ｃの突条１０が順次軸方向に位相がずら
されている。That is, in the roll tap of the present embodiment, since one female screw is formed by three rolls 3a, 3b, 3c, the spacer 11a has a thickness changed by 1/3 of one pitch of the female screw. , 11b, and 11c are prepared, and as described above, for example, the thickest spacer 11a is interposed on the shaft portion 5a side of the roll 3a, and the thinnest spacer 11c is interposed on the shaft portion 5b side. Is equipped. And roll 3
The spacers 11b having an intermediate thickness are interposed at both end sides of the both shaft portions 5a and 5b, and the thinnest spacer 11c is interposed at the shaft portion 5a side of the roll 3c.
The thickest spacer 11a is interposed on the b side, and the ridges 10 of the rolls 3a, 3b, 3c are sequentially shifted in phase in the axial direction.
【００１６】さらに、各ロールの軸部５ｂ側のスペーサ
は、それぞれホルダー７に装着されたスラスト軸受１２
によって軸支されている。Further, the spacer on the shaft portion 5b side of each roll is provided with a thrust bearing 12 mounted on the holder 7 respectively.
Is supported by
【００１７】しかして、加工すべきワークにめねじを加
工する場合には、上記ワーク又はロールタップのいずれ
か一方を上記めねじの１ピッチ当り１回転の速さで回転
させるとともに、加工すべきワークに対してロールタッ
プをピッチ送り機構を用いて前進させる。When a female thread is machined on a workpiece to be machined, either the workpiece or the roll tap is rotated at a speed of one revolution per one pitch of the female thread, and the workpiece is machined. The roll tap is advanced with respect to the work using the pitch feed mechanism.
【００１８】このピッチ送りの進行にしたがい、第１の
位相のロール例えばロール３ｃの第１山（突条）がワー
クの内径に当ると、このロール３ｃはワークと同一の周
速で逆方向に回転を開始し、１ピッチの進行の間に、第
２位相、第３位相のロール３ｂ、３ａの第１山が最初の
ロール３ｃの第１山の軌跡をなぞって順次回転を開始す
る。In accordance with the progress of the pitch feed, when the roll of the first phase, for example, the first crest (projection) of the roll 3c hits the inner diameter of the work, the roll 3c moves in the opposite direction at the same peripheral speed as the work. Rotation is started, and during the progress of one pitch, the first peaks of the rolls 3b and 3a of the second phase and the third phase follow the locus of the first roll 3c and start rotating sequentially.
【００１９】次に、最初のロール３ｃの第２山が第１山
の軌跡をなぞりながら、ロールの突条外径が大きくなっ
た分だけワーク内径を転圧していく。このとき、弦巻線
状のねじピッチを設けていないロールで弦巻線状のねじ
ピッチのめねじを成形することになるが、ロールの径が
所望するめねじの径よりも充分に小さいので、点当たり
となることにより、ロールとめねじフランク面との干渉
問題は実用的に発生しない。Next, while the second crest of the first roll 3c follows the locus of the first crest, the inner diameter of the work is rolled by an amount corresponding to the increase in the outer diameter of the ridge of the roll. At this time, a female thread having a string winding thread pitch is formed by a roll having no string winding thread pitch, but since the diameter of the roll is sufficiently smaller than the desired female thread diameter, Therefore, the problem of interference between the roll and the female screw flank surface does not occur practically.
【００２０】このようにして順次３本のロール３ａ，３
ｂ，３ｃが転圧を繰返しながらめねじを成形することが
できる。そして、ロール３ａ，３ｂ，３ｃの後端部側に
設けられている同一外径の突条すなわち完成山部１０ａ
で数ピッチ転圧することにより、所望するねじ山形状を
安定して成形し、かつ美しいねじフランク面を持ち、寸
法精度の安定しためねじを得ることができる。In this manner, the three rolls 3a, 3
The female screw can be formed while b and 3c repeat rolling. Then, a ridge having the same outer diameter, that is, a completed mountain portion 10a provided on the rear end side of the rolls 3a, 3b, 3c.
By rolling several pitches in the above manner, a desired thread shape can be formed stably, a beautiful screw flank surface can be obtained, and a screw can be obtained for stable dimensional accuracy.
【００２１】[0021]
【発明の効果】以上説明したように、本発明は、外周面
に周方向に延び１ピッチ毎にそれぞれ独立した断面ねじ
山状の複数の突条を有し、その各突条の外径が先端部よ
り順次大きな外径となるように形成した数本のロール
を、互いに平行に且つ同一円周上にそれぞれ回転可能に
配設したので、上記各ロールによってナット等のめねじ
を転造によって形成することができる。したがって、切
削タップにめねじを形成するときのように金属組織のフ
ァイバーフローを切断することなく、ねじ部の強度を高
いものとすることができ、しかもねじフランク面の表面
粗さを良くでき、また工具消耗も低減させることができ
る。As described above, the present invention has a plurality of ridges extending in the circumferential direction on the outer peripheral surface and each having a thread-shaped cross section which is independent at every pitch, and the outer diameter of each ridge is reduced. Since several rolls formed so as to have a larger outer diameter sequentially from the tip end are arranged so as to be rotatable in parallel with each other and on the same circumference, female threads such as nuts are rolled by each roll. Can be formed. Therefore, it is possible to increase the strength of the threaded portion without cutting the fiber flow of the metal structure as in the case of forming the internal thread in the cutting tap, and furthermore, it is possible to improve the surface roughness of the screw flank surface, Also, tool consumption can be reduced.
【図１】本発明のロールタップの縦断側面図。FIG. 1 is a longitudinal sectional side view of a roll tap of the present invention.
【図２】図１のII−II線に沿う断面図。FIG. 2 is a sectional view taken along the line II-II in FIG.
【図３】ロール側面図。FIG. 3 is a side view of a roll.
１ ロールハウジング ２ａ，２ｂ，２ｃ 凹所 ３ａ，３ｂ，３ｃ ロール ４ａ，４ｂ ロールリテーナー ６ トッププレート ７ ホルダー ８ 組付ボルト １０ 突条 １１ａ，１１ｂ，１１ｃ スペーサ REFERENCE SIGNS LIST 1 roll housing 2a, 2b, 2c recess 3a, 3b, 3c roll 4a, 4b roll retainer 6 top plate 7 holder 8 assembling bolt 10 ridge 11a, 11b, 11c spacer
Claims (3)
れ独立した断面ねじ山状の複数の突条を有し、その各突
条の外径が先端部より順次大きくなるように形成された
数本のロールを、互いに平行に且つ同一円周上にそれぞ
れ回転可能に配設したことを特徴とする、めねじ加工用
ロールタップ。An outer peripheral surface is provided with a plurality of ridges extending in the circumferential direction and each having a thread-shaped cross section independent of each other at every pitch, and the outer diameter of each of the ridges is formed so as to gradually increase from the tip end. A roll tap for internal thread machining, wherein a plurality of rolls are rotatably arranged in parallel with each other and on the same circumference.
きくなるように形成された複数の突条の後方側には、同
一外径を有する複数の突条が配列されていることを特徴
とする、請求項１記載のめねじ加工用ロールタップ。2. A plurality of ridges having the same outer diameter are arranged on the rear side of a plurality of ridges formed on the outer peripheral surface of the roll so that the outer diameter is gradually increased from the tip end. The roll tap for female thread processing according to claim 1, wherein:
合、各ロールの突条が隣接するロールの突条に対して１
／ｎピッチづつ軸方向に順次位相がずらされていること
を特徴とする請求項１または２記載のめねじ加工用ロー
ルタップ。3. When n rolls are arranged on the same circumference, the ridge of each roll is one to the ridge of an adjacent roll.
3. The roll tap for internal thread processing according to claim 1, wherein the phase is sequentially shifted in the axial direction by / n pitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13174896A JP2733050B2 (en) | 1996-05-27 | 1996-05-27 | Roll tap for female thread processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13174896A JP2733050B2 (en) | 1996-05-27 | 1996-05-27 | Roll tap for female thread processing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09309025A JPH09309025A (en) | 1997-12-02 |
| JP2733050B2 true JP2733050B2 (en) | 1998-03-30 |
Family
ID=15065276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13174896A Expired - Fee Related JP2733050B2 (en) | 1996-05-27 | 1996-05-27 | Roll tap for female thread processing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2733050B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014214788A1 (en) * | 2014-07-28 | 2016-01-28 | Robert Bosch Gmbh | High-pressure connection device, method and tool for producing a high-pressure connection device and fuel injection valve with a high-pressure connection device |
-
1996
- 1996-05-27 JP JP13174896A patent/JP2733050B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09309025A (en) | 1997-12-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |