JPH06102285B2 - Steel pipe threading method - Google Patents
Steel pipe threading methodInfo
- Publication number
- JPH06102285B2 JPH06102285B2 JP2066989A JP6698990A JPH06102285B2 JP H06102285 B2 JPH06102285 B2 JP H06102285B2 JP 2066989 A JP2066989 A JP 2066989A JP 6698990 A JP6698990 A JP 6698990A JP H06102285 B2 JPH06102285 B2 JP H06102285B2
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- tool
- screw
- steel pipe
- cutting tool
- 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 - Lifetime
Links
Landscapes
- Accessories And Tools For Shearing Machines (AREA)
- Turning (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、管端に特殊なシール部を有する油井管などの
鋼管のねじ切り加工方法に関する。TECHNICAL FIELD The present invention relates to a thread cutting method for a steel pipe such as an oil well pipe having a special seal portion at the pipe end.
＜従来の技術＞ 従来、石油の掘削などに用いられる油井管のねじは、そ
の製造上および用途上の要求条件が極めて厳しく、その
ため例えばAPIねじ継手などが開発されている。<Prior Art> Conventionally, a screw of an oil country tubular good used for oil drilling or the like has extremely strict requirements in terms of manufacturing and use, and therefore, for example, an API screw joint has been developed.
しかし、近年の油井は深くなり、APIねじ継手以上にジ
ョイントストレングスおよび気密性の向上が要求されて
おり、そのために継手部に金属面同士のシール部を増
し、ねじ形状は角形ねじとするとともにねじ間にテフロ
ンリングなどの挿入をはかった継手の開発がなされてい
る。However, oil wells in recent years have become deeper, and joint strength and airtightness are required to be improved more than API threaded joints.Therefore, the joints have more metal-to-metal seals, and the thread shape is square and In the meantime, joints with Teflon rings have been developed.
その特殊シール部を有する油井管のねじは、例えば第３
図に示すように、管端１の端面1aから内面1bにかけて設
けられる内面シール部２と外面1cに設けられる外面シー
ル部３と同じく外面1cに設けられるねじ部４とが切削加
工によって構成される。The screw of the oil country tubular good which has the special seal part is, for example, the third
As shown in the figure, the inner surface seal portion 2 provided from the end surface 1a of the tube end 1 to the inner surface 1b, the outer surface seal portion 3 provided on the outer surface 1c, and the screw portion 4 provided on the outer surface 1c are formed by cutting. .
このようなねじの切削加工の工程は、従来、第４図に示
すような７工程からなっている。すなわち、 (a)ホルダ５に取付けられた切削工具6aを用いて管端１
の端面1aを切削し、さらにその内面1bに粗シール部2aを
形成する工程、 (b)切削工具6bを用いて管端１の外面1cに粗シール部3a
を形成し、ついでねじ下テーパ外径部3bを加工する工
程、 (c)切削工具6cを用いてねじ下テーパ外径部3bに粗ねじ4
aを切削する工程、 (d)切削工具6dを用いて管端内面1bを仕上げる工程、 (e)切削工具6eを用いて内外面シール部2,3を仕上げる工
程、 (f)切削工具6fを用いてねじ部４を２回にわたって仕上
げる工程、 の７工程であり、計６種類の切削工具をその工程ごとに
１個ずつターレット（図示せず）で選択されてホルダ５
に取付けられ、順番に加工に用いられる。Conventionally, such a screw cutting process includes seven processes as shown in FIG. That is, (a) using the cutting tool 6a attached to the holder 5, the pipe end 1
Cutting the end surface 1a of the tube 1 and further forming the rough seal portion 2a on the inner surface 1b thereof, (b) using the cutting tool 6b, the rough seal portion 3a on the outer surface 1c of the pipe end
Then, the step of machining the taper outer diameter part 3b under the screw, (c) using the cutting tool 6c,
a step of cutting a, (d) a step of finishing the pipe end inner surface 1b using the cutting tool 6d, (e) a step of finishing the inner and outer surface seal portions 2 and 3 using the cutting tool 6e, (f) a cutting tool 6f Using the turret (not shown), a total of 6 types of cutting tools are selected by the turret (not shown).
It is attached to and used for processing in sequence.
なお、上記の(a)，(b)の内外面粗シール部の加工および
(d)，(e)の内面仕上および内外面シール部の仕上の加工
は、総形バイトを用いることにより同時に切削すること
が可能である。It should be noted that the above-mentioned (a) and (b) inner and outer surface rough seal parts are processed and
The inner surface finish and the inner and outer surface seal portions (d) and (e) can be simultaneously processed by using a forming tool.
＜発明が解決しようとする課題＞ しかしながら、上記のような従来のねじ切削加工工程に
おいては、その工程ごとに必要とされる切削工具を１個
ずつ選択して取り替えることになるから、同時切削ある
は重切削を行うことができず、シール部を有さない普通
のねじの加工時間に比べてかなり長い時間を要してお
り、設備の稼働能率が低下するという問題がある。<Problems to be Solved by the Invention> However, in the conventional thread cutting process as described above, since one cutting tool required for each process is selected and replaced, there is simultaneous cutting. Cannot perform heavy cutting, requires a considerably longer time than the processing time of a normal screw having no seal portion, and there is a problem that the operating efficiency of the equipment is reduced.
本発明は、上記のような課題に鑑みなされたものであっ
て、短い時間で切削加工を施し得る鋼管のねじ切り加工
方法を提供することを目的とする。The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for thread cutting a steel pipe, which can perform cutting in a short time.
＜課題を解決するための手段＞ 本発明は、工具ホルダに側刃部と下刃部とが設けられた
総形バイトとねじ切削工具とを一定の間隔をおいて所定
の段差を設けて一体的に組み付けた切削加工工具を用い
て、管端に特殊なシール部を有する鋼管のねじ切り加工
方法であって、前記総形バイトの側刃部を用いて前記シ
ール部の端面と外面を切削加工する工程と、前記総形バ
イトの下刃部を用いてねじ下テーパ外径部を切削加工す
る工程と、前記ねじ切削工具を用いて前記ねじ下テーパ
外径部にねじ切削加工を行う工程と、を一連の動作で連
続して行うことを特徴とする鋼管のねじ切り加工方法で
ある。<Means for Solving the Problems> According to the present invention, a tool bit holder having a side blade portion and a lower blade portion is integrally formed with a screw cutting tool by providing a predetermined step at a predetermined interval. Is a method for thread cutting a steel pipe having a special seal portion at the pipe end by using a cutting tool that is assembled as a rule, wherein the end surface and the outer surface of the seal portion are cut using the side blade portion of the forming tool. And a step of cutting the taper outer diameter portion of the screw using the lower blade portion of the forming tool, and a step of performing a thread cutting process on the taper outer diameter portion of the screw using the screw cutting tool. Is continuously performed in a series of operations, which is a threading method for a steel pipe.
＜作用＞ 本発明によれば、側刃部と下刃部とが設けられた総形バ
イトとねじ切削工具とを工具ホルダに一体的に組み付け
るようにしたので、従来例のように切削工具を工程ごと
に取り替えることなく、シール部端面とシール外径部と
ねじ下テーパ外径部の加工さらにねじ部の加工を連続的
に行うことができる。<Operation> According to the present invention, the shaping tool provided with the side blade portion and the lower blade portion and the screw cutting tool are integrally assembled to the tool holder. The end surface of the seal portion, the outer diameter portion of the seal, the taper outer diameter portion of the screw, and the threaded portion can be continuously processed without replacement in each step.
＜実施例＞ 如何に、本発明の実施例について、図面を参照して詳し
く説明する。<Example> An example of the present invention will be described in detail with reference to the drawings.
第１図は、本発明方法の実施に用いる切削加工工具の構
成を示す側面図である。FIG. 1 is a side view showing the configuration of a cutting tool used for carrying out the method of the present invention.
図において、11は、工具ホルダである。In the figure, 11 is a tool holder.
12は、工具ホルダ11の端部に取付けられた総形バイトで
あり、管端１の内外面シール部2,3を切削加工する側刃
部12aと、ねじ下テーパ外径部3bを切削加工する下刃部1
2bとが設けられている。Reference numeral 12 is a general-purpose tool attached to the end portion of the tool holder 11, and a side blade portion 12a for cutting the inner and outer surface seal portions 2 and 3 of the pipe end 1 and a threaded taper outer diameter portion 3b for cutting work. Lower blade part 1
2b and are provided.
13は、ねじ部４を切削加工するチェザなどのねじ切削工
具であり、工具ホルダ11に総形バイト12の端部Ｐから谷
部のＳ点までの距離がｌだけ離れるように取付けられ
る。Reference numeral 13 is a screw cutting tool such as a checker for cutting the screw portion 4, and is attached to the tool holder 11 so that the distance from the end P of the tool bit 12 to the point S of the valley is separated by l.
なお、ねじ切削工具13の谷部Ｓ点の高さは総形バイト12
の下刃部12bの端部Ｐよりａ（通常は、0.1〜1.0mmの範
囲が適当）だけ低い位置とされ、谷部の面の勾配θはね
じ部４の切削面からねじ下テーパ外径部3bの切削面が逃
げられるような大きさの値とされる。In addition, the height of the valley point S of the thread cutting tool 13 is the shape tool 12
It is located at a position lower by a (usually, a range of 0.1 to 1.0 mm is suitable) than the end P of the lower blade portion 12b, and the slope θ of the valley surface is from the cutting surface of the threaded portion 4 to the taper outside diameter of the threaded portion. The size is set so that the cutting surface of the portion 3b can escape.
このように構成された切削加工工具を用いて、鋼管端部
のねじ切削加工を行うときの切削手順について、第２図
を参照して以下に説明する。A cutting procedure for performing thread cutting on the end of the steel pipe using the cutting tool configured as described above will be described below with reference to FIG.
(a)切削する鋼管の管端１に工具ホルダ11を近づけて、
端面1aに総形バイト12の側刃部12aを位置合わせする。(a) Bring the tool holder 11 close to the pipe end 1 of the steel pipe to be cut,
The side blade portion 12a of the forming tool 12 is aligned with the end surface 1a.
(b)ついで、工具ホルダ11あるいは鋼管を回転させて、
管端１に内面シール部２の全部と外面シール部３の一部
を加工して端面仕上を行う。(b) Then, rotate the tool holder 11 or the steel pipe,
The inner surface seal part 2 and a part of the outer surface seal part 3 are processed on the pipe end 1 to finish the end surface.
(c)総形バイト12の下刃部12bを用いて外面シール部３の
仕上加工とねじ下テーパ外径部3bの切削を同時に行う。(c) Using the lower blade portion 12b of the general-purpose tool 12, the outer seal portion 3 is finished and the taper outer diameter portion 3b of the screw is cut at the same time.
(d)工具ホルダ11を若干前進させてねじ切削工具13をね
じ下テーパ外径部3bの一方の端面に位置決めして、ねじ
部４の切削加工を行う。(d) The tool holder 11 is moved slightly forward to position the screw cutting tool 13 on one end face of the screw taper outer diameter portion 3b, and the screw portion 4 is cut.
規格がAPI−L80の油井管に特殊シール部を有する外面ね
じを施す際に本発明の方法を適用した。The method of the present invention was applied to the case of applying an external thread having a special seal portion to an oil country tubular goods whose standard is API-L80.
そのときの１本切削するのに要した純時間（秒）の測定
結果を外径サイズごとに第１表に示した。The measurement results of the pure time (seconds) required for cutting one piece at that time are shown in Table 1 for each outer diameter size.
なお、比較のために従来法による時間をも併せて示し
た。For comparison, the time by the conventional method is also shown.
この第１表から明らかなように、本発明法による正味切
削時間は従来法のそれに対し50〜65％であり、その効果
が大であることがわかる。 As is clear from Table 1, the net cutting time by the method of the present invention is 50 to 65% as compared with that of the conventional method, and it is understood that the effect is great.
＜発明の効果＞ 以上説明したように、本発明によれば、側刃部と下刃部
とが設けられた総形バイトとねじ切削工具とを工具ホル
ダに一体的に組み付けた切削加工工具を用いるようにし
たので、シール部の端面と外面とねじ下テーパ外径部の
加工さらにねじ部の加工を連続的に行うことができ、切
削に要する時間を従来に比し1/2ないし1/3に短縮するこ
とが可能となり、ねじ切削加工の能率を大いに向上させ
ることが可能である。<Effects of the Invention> As described above, according to the present invention, there is provided a cutting tool including a tool holder integrally formed with a tool bit having a side blade and a lower blade, and a screw cutting tool. Since it is used, it is possible to continuously process the end surface and outer surface of the seal part, the outer diameter part of the threaded taper and the thread part, and the time required for cutting is 1/2 to 1/1 / th compared to the conventional method. It is possible to shorten to 3, and it is possible to greatly improve the efficiency of thread cutting.
第１図は本発明方法の実施に用いる切削加工工具の構成
を示す側面図、第２図は切削加工工具の動作手順の説明
図、第３図は従来の油井管の特殊ねじ形状を示す部分断
面図、第４図は従来の油井管のねじ加工工程を示す図で
ある。 １……管端,2……内面シール部,3……外面シール部,4…
…ねじ部,11……工具ホルダ,12……総形バイト,13……
ねじ切削工具。FIG. 1 is a side view showing the configuration of a cutting tool used for carrying out the method of the present invention, FIG. 2 is an explanatory view of an operating procedure of the cutting tool, and FIG. 3 is a portion showing a special screw shape of a conventional oil country tubular good. FIG. 4 is a cross-sectional view showing a conventional threading process for oil country tubular goods. 1 ... Pipe end, 2 ... Inner surface seal part, 3 ... Outer surface seal part, 4 ...
… Screw, 11 …… Tool holder, 12 …… Shape tool, 13 ……
Screw cutting tool.
Claims (1)
た総形バイトとねじ切削工具とを一定の間隔をおいて所
定の段差を設けて一体的に組み付けた切削加工工具を用
いて、管端に特殊なシール部を有する鋼管のねじ切り加
工方法であって、 前記総形バイトの側刃部を用いて前記シール部の端面と
外面を切削加工する工程と、 前記総形バイトの下刃部を用いてねじ下テーパ外径部を
切削加工する工程と、 前記ねじ切削工具を用いて前記ねじ下テーパ外径部にね
じ切削加工を行う工程と、 を一連の動作で連続して行うことを特徴とする鋼管のね
じ切り加工方法。1. A cutting tool in which a tool bit holder having a side blade portion and a lower blade portion and a screw cutting tool are integrally assembled with a predetermined step at a predetermined interval. A method of threading a steel pipe having a special seal portion at a pipe end, the method comprising: cutting an end surface and an outer surface of the seal portion using a side blade portion of the formed tool, and the formed tool. The step of cutting the taper outer diameter part under the screw using the lower blade part of the step, and the step of performing the thread cutting process on the taper outer diameter part under the screw using the thread cutting tool, are continuously performed in a series of operations. A method for threading a steel pipe, characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2066989A JPH06102285B2 (en) | 1990-03-19 | 1990-03-19 | Steel pipe threading method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2066989A JPH06102285B2 (en) | 1990-03-19 | 1990-03-19 | Steel pipe threading method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03270818A JPH03270818A (en) | 1991-12-03 |
| JPH06102285B2 true JPH06102285B2 (en) | 1994-12-14 |
Family
ID=13331936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2066989A Expired - Lifetime JPH06102285B2 (en) | 1990-03-19 | 1990-03-19 | Steel pipe threading method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06102285B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2773513B2 (en) * | 1992-01-20 | 1998-07-09 | 日本鋼管株式会社 | How to thread steel pipes |
| JP2655984B2 (en) * | 1993-03-09 | 1997-09-24 | 川崎製鉄株式会社 | Oil well pipe thread cutting method |
| JPH07178619A (en) * | 1993-12-24 | 1995-07-18 | Kawasaki Steel Corp | Method of cutting theread on steel pipe |
| JP4622394B2 (en) * | 2004-08-31 | 2011-02-02 | Ｊｆｅスチール株式会社 | Steel pipe threading method and apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0435042Y2 (en) * | 1986-02-24 | 1992-08-20 | ||
| JPH0329067Y2 (en) * | 1986-06-17 | 1991-06-21 |
-
1990
- 1990-03-19 JP JP2066989A patent/JPH06102285B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03270818A (en) | 1991-12-03 |
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