JPH03270818A - Method for forming thread on steel pipe - Google Patents
Method for forming thread on steel pipeInfo
- Publication number
- JPH03270818A JPH03270818A JP6698990A JP6698990A JPH03270818A JP H03270818 A JPH03270818 A JP H03270818A JP 6698990 A JP6698990 A JP 6698990A JP 6698990 A JP6698990 A JP 6698990A JP H03270818 A JPH03270818 A JP H03270818A
- Authority
- JP
- Japan
- Prior art keywords
- thread
- cutting
- tool
- cutting tool
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 11
- 239000010959 steel Substances 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 19
- 238000005520 cutting process Methods 0.000 claims abstract description 51
- 238000003754 machining Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 5
- 238000007796 conventional method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Accessories And Tools For Shearing Machines (AREA)
- Turning (AREA)
Abstract
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。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for threading steel pipes such as oil country tubular goods 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, oil country tubular threads used in oil drilling and the like have extremely strict manufacturing and usage requirements, and for this reason, for example, API threaded joints have been developed.
しかし、近年の油井は深くなり、ＡＰＩねじ継手以上に
ジジ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, as oil wells have become deeper in recent years, improvements in physical strength and airtightness are required even more than API threaded joints.To achieve this, the joints have increased the sealing area between the metal surfaces, and the thread shape has been changed to a square thread. Joints have been developed in which a Teflon ring or the like is inserted between the screws.
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と同しく外面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。For example, the oil country pipe thread having the special seal part is
As shown in the figure, an inner seal portion 2 provided from the end surface 1a to the inner surface 1b of the tube end 1, an outer seal portion 3 provided on the outer surface 1c, and a threaded portion 4 provided on the outer surface 1c are constructed by cutting. Ru.
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エ程からなっている。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を形威する工程、（ハ）切削工具６ｂを用
いて管端１の外面１ｃに粗シール１１３ａを形威し、つ
いでねじ下部テーパ外径部３ｂを加工する工程、
（Ｃ） 切削工具６Ｃを用いてねじ下部テーバ外径部
３ｂに粗ねじ４ａを切削する工程、
（イ）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エ程であり、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 thread cutting process consists of seven steps as shown in FIG. That is, (a) cutting the end surface 1a of the tube end 1 using the cutting tool 6a attached to the holder 5, and further forming a rough seal portion 2a on the inner surface 1b; (c) using the cutting tool 6b. forming a rough seal 113a on the outer surface 1c of the tube end 1, and then machining the threaded lower taper outer diameter portion 3b; (C) using the cutting tool 6C to form a rough thread 4a on the threaded lower tapered outer diameter portion 3b; (a) Finishing the inner surface of the tube end 1b using the cutting tool 6d; (e) Cutting the inner and outer seal portions 2.3 using the cutting tool 6e;
and (f) finishing the threaded portion 4 twice using the cutting tool 6f.There are 7 steps in which a total of 6 types of cutting tools are used, one for each step, using a turret (not shown). Selected in holder 5
It is attached to the machine and used for processing in turn.
なお、上記の（ａ）、 （ｂ）の内外面相シール部の加
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。In addition, the machining of the inner and outer seal parts in (a) and (b) above and the inner finishing and finishing of the inner and outer seal parts in (d) and (e) are performed simultaneously by using a full-form cutting tool. Is possible.
〈発明が解決しようとする！１！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、その工程のごとに必要とされる切削工具を１
個ずつ選択することになるから、同時切削あるいは重切
削を行うことができず、シール部を有さない普通ねじの
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。<Invention tries to solve! 1! Problem > However, in the conventional thread cutting process as described above, only one cutting tool is required for each process.
Since each piece has to be selected one by one, simultaneous cutting or heavy cutting cannot be performed, and the processing time is considerably longer than that for ordinary threads that do not have seals, reducing the operating efficiency of the equipment. There is a problem with doing so.
本発明は、上記のような！１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 is as described above! The purpose of this invention is to provide a method for threading a steel pipe, which can be cut in a short period of time.
〈課題を解決するための手段〉
本発明は、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、工具ホルダに取付けられた総形バ
イトを用いて、シール部端面とシール外径部とねじ下テ
ーパ外径部との加工を連続して行う工程と、前記工具ホ
ルダに取付けられたねじ切削工具を用いて、前記ねじ下
テーパ外径部の加工終了後に引き続き連続してねじ切削
加工を行う工程と、からなる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> The present invention is a method for threading a steel pipe having a special seal portion at the tube end, in which the end face of the seal portion and the outside of the seal are A process of continuously machining the diameter part and the outer diameter part of the lower thread taper, and a process of continuously machining the outer diameter part of the lower thread taper after machining the outer diameter part of the lower thread taper using the thread cutting tool attached to the tool holder. A method for threading a steel pipe, comprising the steps of: performing cutting.
〈作 用〉
本発明によれば、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、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。<Function> According to the present invention, since the full-form cutting tool and the thread cutting tool are integrally assembled to the tool holder, it is possible to process the end face of the seal part, the seal outer diameter part, the lower thread taper outer diameter part, and also to process the thread. Parts can be processed continuously.
〈実施例〉
以下に、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。<Examples> Examples of the present invention will be described in detail below 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 to carry 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、ねじ下部テーバ外径部３ｂを切削加
工する下刃部１２ｂとが設けられている。Reference numeral 12 denotes a full-form cutting tool attached to the end of the tool holder 11, which cuts the side blade portion 12a for cutting the inner and outer seal portions 2.3 of the tube end 1 and the outer diameter portion 3b of the threaded lower part. A lower blade portion 12b is provided.
１３は、ねじ部４を切削加工するチェザなとのねじ切削
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５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 denotes a thread cutting tool for cutting the threaded portion 4, and the tool holder 11 is provided with an end P of the general cutting tool 12.
It is installed so that the distance from to the five points in the valley is l.
なお、ねじ切削工具１３の谷部Ｓ点の高さは総形バイ目
２の下刃部１２ｂの端部Ｐよりａ （通常は、０．１〜
１．０＋ｎｍ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の切削面から下部テーパ外径部
３ｂの切削面が逃げられるような大きさの値とされる。The height of the trough S point of the thread cutting tool 13 is a from the end P of the lower blade part 12b of the general die 2 (usually 0.1~
The slope θ of the valley surface is set to a value such that the cut surface of the lower tapered outer diameter portion 3b can escape from the cut surface of the threaded portion 4. .
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 thread cutting the end of a steel pipe using the cutting tool configured as described above will be described below with reference to FIG. 2.
（ａ） 切削する鋼管の管＠１に工具ホルダ１１を近
づけて、端部１ａに総形バイ目２の側刃部１２ａを位置
合わせする。(a) Bring the tool holder 11 close to the steel pipe @1 to be cut, and align the side blade portion 12a of the general die 2 with the end portion 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) Next, the tool holder 11 or the steel pipe is rotated, and the entire inner seal portion 2 and part of the outer seal portion 3 are processed on the tube end 1 to finish the end surface.
（Ｃ） 総形バイ目２の下刃部１２ｂを用いて外面シ
ル部３の仕上加工とねじ下部テーパ外径部３ｂの切削を
同時に行う。(C) Finishing of the outer sill portion 3 and cutting of the lower tapered outer diameter portion 3b of the screw are performed simultaneously using the lower blade portion 12b of the general die 2.
（ｄ） 工具ホルダ１１を若干前進させてねじ切削工
具１３をねじ下部テーパ外径部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) Slightly move the tool holder 11 forward to position the thread cutting tool 13 on one end surface of the threaded lower tapered outer diameter portion 3b, and perform cutting on the threaded portion 4.
規格が＾Ｐト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 an external thread having a special seal part on an oil country tubular goods having a standard of ^P to 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 to cut 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 taken by the conventional method is also shown.
第 １ 表
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て５０〜６５％であり、そ
の効果が大であることがわかる。Table 1 As is clear from Table 1, the net cutting time according to the method of the present invention is 50 to 65% of that of the conventional method, and it can be seen 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、総形バイトとね
じ加工用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、シール部端面とシー
ル外径部とねじ下部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 explained above, according to the present invention, a cutting tool in which a full-form cutting tool and a thread processing tool are integrally assembled to a tool holder is used, so that the end face of the seal portion and the seal Processing of the outer diameter part and the tapered outer diameter part of the lower thread part, as well as the thread part, can be carried out continuously, making it possible to reduce the time required for cutting to 1/2 to 1/3 compared to the conventional method. 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・・・わし部、１１・・・工具
ホルダ。
１２・・・総形バイト
１３・・・ねじ切削工具。
第１図Fig. 1 is a side view showing the configuration of a cutting tool used to carry out the method of the present invention, Fig. 2 is an explanatory diagram of the operating procedure of the cutting tool, and Fig. 3 is a section showing a special thread shape of a conventional oil country tubular goods. The cross-sectional view, FIG. 4, is a diagram showing a conventional threading process for oil country tubular goods. 1... Pipe end, 2... Inner seal part, 3...
- External seal part, 4... Eagle part, 11... Tool holder. 12... General tool bit 13... Thread cutting tool. Figure 1
Claims (1)
であって、 工具ホルダに取付けられた総形バイトを用いて、シール
部端面とシール外径部とねじ下テーパ外径部との加工を
連続して行う工程と、 前記工具ホルダに取付けられたねじ切削工具を用いて、
前記ねじ下テーパ外径部の加工終了後に引き続き連続し
てねじ切削加工を行う工程と、 からなることを特徴とする鋼管のねじ切り加工方法。[Claims] A method for threading a steel pipe having a special seal at the end of the pipe, which uses a full-form cutting tool attached to a tool holder to cut the end face of the seal, the outside diameter of the seal, and the outside of the taper below the thread. A process of continuously performing machining with the diameter part, and using a thread cutting tool attached to the tool holder,
A method for thread cutting a steel pipe, comprising: continuously performing thread cutting after the completion of processing the outer diameter portion of the lower thread taper.
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 true JPH03270818A (en) | 1991-12-03 |
| JPH06102285B2 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) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05192818A (en) * | 1992-01-20 | 1993-08-03 | Nkk Corp | Thread cutting method for steel pipe |
| JPH06262434A (en) * | 1993-03-09 | 1994-09-20 | Kawasaki Steel Corp | Thread cutting machine for steel pipe and thread cutting work method using this machine |
| JPH07178619A (en) * | 1993-12-24 | 1995-07-18 | Kawasaki Steel Corp | Method of cutting theread on steel pipe |
| JP2006068840A (en) * | 2004-08-31 | 2006-03-16 | Jfe Steel Kk | Method and device for threading steel pipe |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62138501U (en) * | 1986-02-24 | 1987-09-01 | ||
| JPS63719U (en) * | 1986-06-17 | 1988-01-06 |
-
1990
- 1990-03-19 JP JP2066989A patent/JPH06102285B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62138501U (en) * | 1986-02-24 | 1987-09-01 | ||
| JPS63719U (en) * | 1986-06-17 | 1988-01-06 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05192818A (en) * | 1992-01-20 | 1993-08-03 | Nkk Corp | Thread cutting method for steel pipe |
| JPH06262434A (en) * | 1993-03-09 | 1994-09-20 | Kawasaki Steel Corp | Thread cutting machine for steel pipe and thread cutting work method using this machine |
| JPH07178619A (en) * | 1993-12-24 | 1995-07-18 | Kawasaki Steel Corp | Method of cutting theread on steel pipe |
| JP2006068840A (en) * | 2004-08-31 | 2006-03-16 | Jfe Steel Kk | Method and device for threading 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06102285B2 (en) | 1994-12-14 |
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