JPS646886B2 - - Google Patents
Info
- Publication number
- JPS646886B2 JPS646886B2 JP7306083A JP7306083A JPS646886B2 JP S646886 B2 JPS646886 B2 JP S646886B2 JP 7306083 A JP7306083 A JP 7306083A JP 7306083 A JP7306083 A JP 7306083A JP S646886 B2 JPS646886 B2 JP S646886B2
- Authority
- JP
- Japan
- Prior art keywords
- thread
- chuck
- centering
- point
- positioning chuck
- 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
Links
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
- B23B5/16—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for bevelling, chamfering, or deburring the ends of bars or tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turning (AREA)
Description
【発明の詳細な説明】 本発明は、テーパーねじの加工方法に関する。[Detailed description of the invention] The present invention relates to a method for processing a tapered thread.
一般に油井管等の長尺等は、管端にテーパーね
じが切られカツプリング接続されるが、そのねじ
は気密性が要求されるので寸法精度の高いものが
要求されている。 Generally, long lengths such as oil country tubular goods are connected by coupling with a tapered thread cut at the end of the pipe, but the thread is required to be airtight, so it is required to have high dimensional accuracy.
ところで、テーパーねじは、第１図に示すよう
に、黒皮のない完全ねじ部Lclと黒皮の残つてい
る不完全ねじ部Lulとに分かれ、管端からねじの
切り上り端Luまでの長さ（Lcl＋Lul）に対する
完全ねじ部の長さLclは、ねじ寸法毎に決められ
ている。そして、この規格上の完全ねじ部と不完
全ねじ部との境に相当する位置をLcポイントと
称している。従つて、実際のねじ切り加工におい
ては、ねじ寸法毎に決められるLcポイントには
黒皮が残つていることは許されず、完全ねじ部を
構成しなければならない。 By the way, as shown in Figure 1, a tapered thread is divided into a completely threaded part Lcl without a black skin and an incomplete thread part Lul with a black skin remaining, and the length from the pipe end to the cut end Lu of the thread. The length Lcl of the fully threaded portion relative to the length (Lcl+Lul) is determined for each thread size. The position corresponding to the boundary between the fully threaded portion and the incompletely threaded portion according to this standard is called the Lc point. Therefore, in actual thread cutting, it is not allowed to have black skin remaining at the Lc point, which is determined for each thread size, and a complete thread must be formed.
従来、この種のねじ切り加工においては、ねじ
寸法によつてそのLcポイントが異なつているも
ののその変異は大きくないので、それらの平均値
に相当するような固定位置で芯出しを行なつて加
工をしていた。 Conventionally, in this type of thread cutting, although the Lc point differs depending on the thread size, the variation is not large, so processing is performed by centering at a fixed position that corresponds to the average value. Was.
しかし、管端に曲がりがあつたり、芯出し不良
があると、Lcポイントに黒皮が残り、完全ねじ
部を構成することができなかつた。 However, if the tube end was bent or there was poor centering, a black crust remained at the Lc point, making it impossible to form a completely threaded section.
本発明は、このような状況に鑑みて発明された
ものであり、管端に曲がりがあつたり、芯出し不
良があつても、管端からLcポイントまでを完全
ねじ部にするようにしたテーパーねじの加工方法
を提供するものである。 The present invention was invented in view of this situation, and it provides a taper that allows a complete thread from the tube end to the Lc point even if the tube end is bent or has poor centering. This provides a method for processing screws.
本発明に係るテーパーねじの加工方法は、Lc
ポイントで被加工部材の芯出しを行なつてねじ加
工をすることに特徴を有している。 The tapered thread processing method according to the present invention is Lc
The feature is that thread processing is performed by centering the workpiece at a point.
次に、本発明の実施例を図面に基づいて説明す
る。第２図は、本発明の一実施例に係る方法を実
施した回転工具型のねじ切り装置の説明図であ
る。 Next, embodiments of the present invention will be described based on the drawings. FIG. 2 is an explanatory diagram of a rotary tool type thread cutting device that implements a method according to an embodiment of the present invention.
第２図において、１は鋼管、２はフローテイン
グチヤツク、３はポジシヨニングチヤツクであ
り、軸方向に移動可能に構成されている。４はポ
ジシヨニングチヤツク３を上下動させるシリン
ダ、５はポジシヨニングチヤツクを管軸方向に移
動させるモータである。 In FIG. 2, 1 is a steel pipe, 2 is a floating chuck, and 3 is a positioning chuck, which are configured to be movable in the axial direction. 4 is a cylinder that moves the positioning chuck 3 up and down, and 5 is a motor that moves the positioning chuck in the tube axis direction.
芯出しは、図示しない固定チヤツクとポジシヨ
ニングチヤツク３とによつて行なう。このときの
ポジシヨニングチヤツク３の位置決めは、シリン
ダ４とモータ５とによつて行なうが、ポジシヨニ
ングチヤツク３の管軸方向の位置は、鋼管１の
Lcポイントと一致させる。このようにして、Lc
ポイントで芯合わせを行ない、その後、フローテ
イングチヤツク２を固定し、ポジシヨニングチヤ
ツク３を解放し、ねじ切り加工に入る。 Centering is performed using a fixing chuck and a positioning chuck 3 (not shown). At this time, the positioning chuck 3 is positioned by the cylinder 4 and the motor 5, but the position of the positioning chuck 3 in the tube axis direction is
Match Lc point. In this way, Lc
Centering is performed at the points, then the floating chuck 2 is fixed, the positioning chuck 3 is released, and the thread cutting process begins.
このようにして鋼管１のLcポイントで芯出し
をした後ねじ切り加工をした場合の結果を、従来
の方法による結果と共に第３図に示す。この図に
おいて、縦軸には外径をとり、０％は基準となる
呼称外径を示し、横軸には管端曲りをとつてお
り、Ａの領域は従来の方法によつて芯出しを行な
つて加工をした場合の検査の合格領域を示し、Ｂ
の領域は上記実施例による場合の検査の合格領域
を示している。この図から明らかなように、上記
実施例による方法の方が合格領域が広く、従つ
て、管端曲がり及び芯出し不良があつても高精度
な加工が可能になつている。 The results of thread cutting after centering the steel pipe 1 at the Lc point in this manner are shown in FIG. 3 together with the results of the conventional method. In this figure, the vertical axis shows the outer diameter, 0% indicates the reference nominal outer diameter, the horizontal axis shows the bending of the pipe end, and the area A is centered using the conventional method. B
The area indicates the pass area of the inspection in the case of the above embodiment. As is clear from this figure, the method according to the above-mentioned embodiment has a wider acceptance range, and therefore allows highly accurate machining even when there is a bend in the tube end or poor centering.
なお、上述の実施例は、工具回転型の装置の例
を示したが、管回転型の装置においても同様の本
発明は適用されることはいうまでもない。 Although the above-mentioned embodiments are examples of tool rotation type devices, it goes without saying that the present invention can also be applied to tube rotation type devices.
以上の説明から明らかなように、本発明に係る
方法は、ポジシヨニングチヤツクを軸方向に単独
で移動可能に構成し、該チヤツクにより被加工部
材のLcポイントで芯出しを行なうようにしたの
で、管端曲りや芯出し不良があつてもそれぞれ一
定の範囲内であれば、充分に所定の加工精度が得
られる。 As is clear from the above description, in the method according to the present invention, the positioning chuck is configured to be movable independently in the axial direction, and the chuck performs centering at the Lc point of the workpiece. Even if there is bending of the tube end or poor centering, as long as they are within certain ranges, sufficient machining accuracy can be achieved.
第１図はテーパーねじの断面説明図、第２図は
本発明の一実施例に係る方法を適用したねじ切り
装置の説明図、第３図は前記実施例の結果の特性
図である。
１……鋼管、２……フローテイングチヤツク、
３……ポジシヨニングチヤツク、４……シリン
ダ、５……モータ。
FIG. 1 is an explanatory cross-sectional view of a tapered thread, FIG. 2 is an explanatory view of a thread cutting device to which a method according to an embodiment of the present invention is applied, and FIG. 3 is a characteristic diagram of the results of the above embodiment. 1...Steel pipe, 2...Floating chuck,
3...Positioning chuck, 4...Cylinder, 5...Motor.
Claims (1)
向に単独で移動可能に構成し、該チヤツクにより
被加工部材のLcポイントで芯出しを行なつた後、
ねじ切り加工をするようにしたことを特徴とする
テーパーねじの加工方法。1 A positioning chuck is configured to be movable independently in the axial direction of the workpiece, and after centering the workpiece at the Lc point using the chuck,
A method for processing a tapered thread, characterized by performing thread cutting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7306083A JPS59201720A (en) | 1983-04-27 | 1983-04-27 | Working for tapered screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7306083A JPS59201720A (en) | 1983-04-27 | 1983-04-27 | Working for tapered screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59201720A JPS59201720A (en) | 1984-11-15 |
| JPS646886B2 true JPS646886B2 (en) | 1989-02-06 |
Family
ID=13507428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7306083A Granted JPS59201720A (en) | 1983-04-27 | 1983-04-27 | Working for tapered screw |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59201720A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5178034B2 (en) * | 2007-03-28 | 2013-04-10 | 新日鐵住金株式会社 | Cutting method of screw to oil well pipe end |
| CN103506636A (en) * | 2013-10-16 | 2014-01-15 | 沈阳工业大学 | Automatic positioning and clamping device and method of drill rod and drill collar on pipe threading lathe |
-
1983
- 1983-04-27 JP JP7306083A patent/JPS59201720A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59201720A (en) | 1984-11-15 |
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