JPH11114640A - Pipe end opening drawing method for oil country tubular goods and opening drawing jig - Google Patents
Pipe end opening drawing method for oil country tubular goods and opening drawing jigInfo
- Publication number
- JPH11114640A JPH11114640A JP27535397A JP27535397A JPH11114640A JP H11114640 A JPH11114640 A JP H11114640A JP 27535397 A JP27535397 A JP 27535397A JP 27535397 A JP27535397 A JP 27535397A JP H11114640 A JPH11114640 A JP H11114640A
- Authority
- JP
- Japan
- Prior art keywords
- country tubular
- pipe end
- oil country
- jig
- spindle head
- 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.)
- Pending
Links
Landscapes
- Forging (AREA)
Abstract
(57)【要約】
【課題】 口絞り加工のために専用の機械を必要とせ
ず、ネジ切り加工前に設置されている面取り機を用いて
口絞り加工が可能である油井管の管端口絞り加工方法お
よびそのための口絞り治具を提供する。
【課題】 油井管２１に設けるネジ継手の先端に形成さ
れるメタルシ−ル部の肉厚を確保するための油井管２１
の管端口絞り加工方法であって、油井管２１の管端内面
のベベル加工を行うための面取機１１のスピンドルヘッ
ド１３に、複数のスウェ−ジロ−ラ６を備えた口絞り治
具１を装着し、前記面取機１１の回転力および推進力を
利用して前記口絞り治具１により、前記油井管２１の管
端口絞り加工を行うことを特徴とする油井管の管端口絞
り加工方法。
(57) [Abstract] [PROBLEMS] A pipe end drawing of an oil country tubular good that does not require a special machine for drawing, and can use a chamfering machine installed before thread cutting. Provided is a processing method and a drawing jig therefor. PROBLEM TO BE SOLVED: To provide an oil well pipe 21 for securing a thickness of a metal seal portion formed at a tip of a threaded joint provided on the oil well pipe 21.
A jig 1 provided with a plurality of swaging rollers 6 on a spindle head 13 of a chamfering machine 11 for beveling an inner surface of a pipe end of an oil country tubular good 21. Wherein the end of the oil well pipe 21 is drawn by the drawing jig 1 using the rotational force and the propulsive force of the chamfering machine 11. Method.
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、油井管管端に設
けるネジ継手の先端に形成されるメタルシ−ル部の肉厚
を確保するための油井管の管端口絞り加工方法およびそ
のための口絞り治具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of drawing a pipe end of an oil country tubular good for securing the thickness of a metal seal formed at the tip of a threaded joint provided at the end of the oil country tubular good, and a method of drawing the same. About jigs.
【０００２】[0002]
【従来の技術】油井管２１の管端には、図 に示すよう
に、外周面にテ−パ−雄ネジ２２を有するネジ継手２３
が設けられるが、テ−パ−雄ネジ２２の管端側には、テ
−パ−雄ネジ２２に引き続いてメタルシ−ル部２４が設
けられている。そして、メタルシ−ル部２４の端面２４
ａが、短管継手（図示せず）の端面２４ａと対応する当
接面に当接することにより、油井管のシ−ル性が高まる
ようになっている。2. Description of the Related Art As shown in the drawing, a threaded joint 23 having a tapered male screw 22 on the outer peripheral surface is provided at the pipe end of an oil country tubular good 21.
A metal seal portion 24 is provided on the pipe end side of the taper male screw 22 following the taper male screw 22. Then, the end surface 24 of the metal seal portion 24
When a contacts the contact surface corresponding to the end surface 24a of the short pipe joint (not shown), the sealing property of the oil country tubular good is enhanced.
【０００３】ところで、油井管の呼称肉厚が薄くなれば
なるほど、メタルシ−ル部２４の端面２４ａの肉厚ｔは
薄くなるが、油井管２１を通過する油の内圧に耐えるた
めに、肉厚ｔはある一定値ｔ0 以上に確保されることが
必要である。[0003] The thinner the nominal wall thickness of the oil country tubular goods, the thinner the thickness t of the end face 24 a of the metal seal portion 24. t needs to be secured to a certain constant value t 0 or more.
【０００４】しかしながら、油井管の呼称肉厚が薄くな
ると、不円、芯ずれおよび偏肉等の程度が許容範囲以内
に入っていても、油井管の全円周にわたって肉厚ｔを許
容値以上に確保することは困難になる。However, when the nominal thickness of the oil country tubular goods is reduced, even if the degree of non-circularity, misalignment, uneven thickness, etc. is within the allowable range, the wall thickness t exceeds the allowable value over the entire circumference of the oil country tubular goods. It is difficult to secure.
【０００５】そして、その結果部分的に肉厚ｔが一定値
ｔ0 を割る部分が発生し、管端内面の面取り加工（ベベ
ル加工）を行っても、面取りができない箇所が発生す
る。このような面取りができないほど肉厚ｔが薄い箇所
は、当然のことながら耐内圧性に欠けるという問題点が
ある。[0005] and thus partially portion thickness t is divided by a predetermined value t 0 is generated, even if the chamfering of the pipe end inside surface (the beveled), portions that can not chamfer is generated. There is a problem that the portion where the thickness t is so thin that chamfering cannot be performed naturally lacks internal pressure resistance.
【０００６】そこで、従来はこのような問題を解消する
ために、熱間または冷間で金型によるプレスあるいはダ
イとマンドレルツ−ルによる鍛造により、油井管の管端
に口絞り加工を施している。Therefore, conventionally, in order to solve such a problem, the pipe end of the oil country tubular good is subjected to drawing by hot or cold pressing with a die or forging with a die and a mandrel tool. .
【０００７】このように、油井管の管端に口絞り加工を
施すと、管端部分の内径が小さくなり、内面面取り加工
を行っても、管端面に十分内圧に耐えうる肉厚を確保す
ることができ、合わせて管端外径が小さくなるので、外
削時の粗加工の能率を高めることができるのである。As described above, when the pipe end of the oil country tubular good is subjected to mouth drawing, the inner diameter of the pipe end becomes small, and even when the internal chamfering is performed, the pipe end is secured to a sufficient thickness to withstand the internal pressure. In addition, the outer diameter of the pipe end is reduced, so that the efficiency of the roughing at the time of external cutting can be improved.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、上述し
た油井管管端の口絞り加工には次のような問題点があ
る。 （１）口絞り加工専用のプレス機が必要であるので、設
備費用が高くなる。 （２）口絞り加工をネジ切り加工前にしなければならな
いというプロセス上の制約を受けることになり、製造コ
ストの上昇につながる。However, there is the following problem in the above-described drawing of the end of an oil country tubular good. (1) Since a press machine dedicated to the drawing process is required, the equipment cost increases. (2) There is a process restriction that the drawing process must be performed before the thread cutting process, which leads to an increase in manufacturing cost.
【０００９】この発明は、従来技術の上述したような問
題点を解消するためになされたものであり、口絞り加工
のために専用の機械を必要とせず、ネジ切り加工前に設
置されている面取り機を用いて口絞り加工が可能である
油井管の管端口絞り加工方法およびそのための口絞り治
具を提供することを目的としている。The present invention has been made to solve the above-mentioned problems of the prior art, and does not require a special machine for drawing, and is installed before thread cutting. It is an object of the present invention to provide a method of drawing a pipe end of an oil country tubular good, which can be drawn by using a chamfering machine, and a drawing jig for the method.
【００１０】[0010]
【課題を解決するための手段】この発明に係る油井管の
管端口絞り加工方法は、油井管管端に設けるネジ継手の
先端に形成されるメタルシ−ル部の肉厚を確保するため
の油井管の管端口絞り加工方法であって、油井管の管端
内面のベベル加工を行うための面取機のスピンドルヘッ
ドに、複数のスウェ−ジロ−ラを備えた口絞り治具を装
着し、前記面取機の回転力および推進力を利用して前記
口絞り治具により、前記油井管の管端口絞り加工を行う
ものである。SUMMARY OF THE INVENTION An oil well pipe end drawing method according to the present invention is directed to an oil well for securing the thickness of a metal seal portion formed at the tip of a threaded joint provided at the end of an oil well pipe. A pipe end opening drawing method for a pipe, wherein a mouth drawing jig provided with a plurality of swage rollers is attached to a spindle head of a chamfering machine for performing beveling of an inner surface of a pipe end of an oil country tubular good, The end of the oil well pipe is drawn by the drawing jig using the rotational force and the propulsive force of the chamfering machine.
【００１１】面取機のスピンドルヘッドに、スウェ−ジ
ロ−ラヘッドを装着し、スピンドルヘッドを回転させ
る。A swage roller head is mounted on a spindle head of a chamfering machine, and the spindle head is rotated.
【００１２】そして、面取機を前進させて、チャックで
固定した油井管の管端に口絞り治具を近づけ、複数のス
ウェ−ジロ−ラを油井管の管端の外周面に沿って接触さ
せる。[0012] Then, the chamfering machine is advanced to bring the squeezing jig closer to the pipe end of the oil well pipe fixed by the chuck, and a plurality of swage rollers are brought into contact with the outer peripheral surface of the pipe end of the oil well pipe. Let it.
【００１３】油井管の管端の外周面に接触した複数の円
錐状のスウェ−ジロ−ラは、軸受によって無駆動回転で
きる構造となっているので、スウェ−ジロ−ラが油井管
の外表面に接触すると、接触抵抗によりその回転軸の回
りに自転する。そして、スピンドルヘッドの回転にとも
なってスウェ−ジロ−ラヘッドが回転するので、スウェ
−ジロ−ラはそれぞれの回転軸の回りに自転しながら油
井管の外周面に沿って回転する。[0013] The plurality of conical swage rollers in contact with the outer peripheral surface of the pipe end of the oil country tubular goods have a structure that can be rotated without driving by bearings. When it comes into contact with, it rotates around its rotation axis due to contact resistance. Then, since the swage roller head rotates with the rotation of the spindle head, the swage rollers rotate along the outer peripheral surface of the oil country tubular goods while rotating around their respective rotation axes.
【００１４】そして、スウェ−ジロ−ラの接触後も面取
機の前進を継続させると、スウェ−ジロ−ラを介して面
取機の推力が油井管管端の外表面に伝達される。Then, when the advancing of the chamfering machine is continued even after the contact with the swaging roller, the thrust of the chamfering machine is transmitted to the outer surface of the pipe end of the oil country tubular good through the swaging roller.
【００１５】そして、それぞれのスウェ−ジロ−ラは、
先端から外径が拡大していくテ−パ−ロ−ラとなってい
るため、前記推力の分力が油井管の半径方向に作用し、
油井管はスウェ−ジロ−ラにより外径が小さくなるよう
に加工される。スウェ−ジロ−ラの外径は、前述したよ
うに油井管の管端に近づくほど大ききなっているので、
その加工量もまた管端に近いほど大きくなり、油井管の
管端に一定のテ−パ−を有する口絞り部分が形成され
る。[0015] Each swage roller is
Because it is a taper roller whose outer diameter increases from the tip, the component force of the thrust acts in the radial direction of the oil country tubular goods,
The oil country tubular goods are machined by swage rollers to reduce the outer diameter. As described above, the outer diameter of the swage roller is larger as it approaches the pipe end of the oil country tubular good.
The amount of processing also increases as the position is closer to the pipe end, and an aperture portion having a constant taper is formed at the pipe end of the oil country tubular good.
【００１６】上記口絞り部分が形成される油井管の管端
は、もともとメタルシ−ル部を形成するために、外周面
が一定の厚さ切削により除去されるところであるが、口
絞り加工により切削されるはずの肉厚が内径側へと移動
することになり、油井管端面の内径は口絞り加工前より
も小さくなる。このことにより、内面面取り加工後の油
井管端面の肉厚が確保されることになり、メタルシ−ル
部が十分なシ−ル性を発揮することになる。[0016] The end of the oil country tubular good in which the above-described mouth drawing portion is formed is a portion where the outer peripheral surface is originally removed by cutting to a certain thickness in order to form a metal seal portion. The wall thickness to be removed moves to the inner diameter side, and the inner diameter of the end surface of the oil country tubular good becomes smaller than before the opening drawing. As a result, the wall thickness of the end surface of the oil country tubular good after chamfering the inner surface is ensured, and the metal seal portion exhibits a sufficient sealing property.
【００１７】また、この発明に係る口絞り治具は、上記
油井管の管端口絞り加工方法に使用する口絞り治具であ
って、前記面取機のスピンドルヘッドに装着可能で、板
面がスピンドルヘッドの回転軸と直交する面板と、この
面板のスピンドルヘッドに装着される側とは反対側の板
面上に、配置位置がスピンドルヘッドの軸芯を中心とし
た一定半径の円形軌跡上に位置するように配置され、回
転軸がスピンドルヘッドの回転軸と平行な複数の無駆動
スウェ−ジロ−ラとから構成されるものである。[0017] The mouth drawing jig according to the present invention is a mouth drawing jig for use in the above-described method for drawing a pipe end of an oil country tubular good, and can be mounted on a spindle head of the chamfering machine, and has a plate surface. On a face plate that is perpendicular to the rotation axis of the spindle head, and on a face of the face plate opposite to the side mounted on the spindle head, the arrangement position is on a circular locus with a constant radius centered on the spindle head axis. And a plurality of non-driving swage rollers whose rotation axes are parallel to the rotation axis of the spindle head.
【００１８】面取機のスピンドルヘッドに容易に装着で
き、面取機の回転力を利用して油井管管端の口絞り加工
ができるので、口絞り加工用の専用機を必要とせず、か
つネジ切り加工後でも口絞り加工を行うことができるの
で、プロセス上の制約がなくなり、製造費が低減する。Since it can be easily mounted on the spindle head of the chamfering machine and the end drawing of the oil country tubular good can be performed using the rotational force of the chamfering machine, a dedicated machine for the opening drawing is not required, and Since the mouth drawing can be performed even after the thread cutting, there is no restriction on the process, and the manufacturing cost is reduced.
【００１９】[0019]
【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。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００２０】図１は本発明の実施の形態の油井管の管端
口絞り加工を実施するために、本発明の実施の形態の油
井管の管端口絞り治具を、面取機のスピンドルヘッドに
装着した状態を示す断面図である。FIG. 1 shows a pipe end drawing jig for an oil country tubular good according to an embodiment of the present invention, which is mounted on a spindle head of a chamfering machine in order to carry out a pipe end drawing of an oil country tubular good according to the present invention. It is sectional drawing which shows the state which mounted | worn.
【００２１】本発明の実施の形態の油井管の管端口絞り
治具１は、面取機１１のスピンドル１２先端のスピンド
ルヘッド１３に装着可能な面板２と、面板２上に設けら
れた回転支軸支持部材３と、回転支軸支持部材３に軸芯
が前記スピンドル１２の軸芯１２ａと平行となるように
取り付けられた回転支軸４と、ベアリング５を介して回
転支軸４の回りに無駆動回転するスウェ−ジロ−ラ６と
から構成されている。A jig 1 for squeezing a pipe end of an oil country tubular good according to an embodiment of the present invention includes a face plate 2 which can be mounted on a spindle head 13 at the tip of a spindle 12 of a chamfering machine 11, and a rotary support provided on the face plate 2. Around a shaft support member 3, a rotation shaft 4 attached to the rotation shaft support member 3 such that the axis is parallel to the axis 12 a of the spindle 12, and the rotation shaft 4 via a bearing 5. And a swaging roller 6 that rotates without driving.
【００２２】スウェ−ジロ−ラ６は２個以上が配置され
ており、かつ各スウェ−ジロ−ラ６の回転の中心、すな
わち前記回転支軸４の軸芯とスピンドル１２の軸芯１２
ａとの間の距離は、一定値となるように配置されてい
る。なお、図示していないが、それぞれの回転支軸４は
面板２の板面上をガイド溝に沿って、面板２の中心方向
に移動可能なスウェ−ジロ−ラブロックに支持されてお
り、口絞り加工を行う油井管の外径に応じて、回転支軸
４の軸芯とスピンドル１２の軸芯１２ａとの間の距離が
調整できるようになっている。Two or more swage rollers 6 are arranged, and the center of rotation of each swage roller 6, that is, the axis of the rotation support shaft 4 and the axis 12 of the spindle 12.
The distance from a is set to be a constant value. Although not shown, each rotating shaft 4 is supported by a swage roller block movable along the guide groove on the plate surface of the face plate 2 toward the center of the face plate 2. The distance between the axis of the rotary support shaft 4 and the axis 12a of the spindle 12 can be adjusted in accordance with the outer diameter of the oil country tubular goods to be drawn.
【００２３】また、スウェ−ジロ−ラ６は、先端から後
端に向けて外径が大きくなるテ−パ−ロ−ラとなってい
る。The swage roller 6 is a taper roller whose outer diameter increases from the front end to the rear end.
【００２４】次に、上述した口絞り治具１を使用した本
発明の実施の形態の油井管の管端口絞り加工方法を説明
する。Next, a method of drawing a pipe end of an oil country tubular good according to an embodiment of the present invention using the above described drawing jig 1 will be described.
【００２５】この口絞り治具１を使用して油井管２１の
管端口絞り加工を行うときには、口絞り治具１の面板２
を面取機１１のスピンドルヘッドにボルト等を使用して
固着する。When the pipe end mouth drawing of the oil country tubular good 21 is performed using the mouth drawing jig 1, the face plate 2 of the mouth drawing jig 1 is used.
Is fixed to the spindle head of the chamfering machine 11 using bolts or the like.
【００２６】そして、スピンドル１２を回転させながら
面取機１１を前進させ、スウェ−ジロ−ラ６をチャック
１４で固定した油井管２１の管端に近づける。油井管２
１はあらかじめその軸芯２１ａが、スピンドル１２の軸
芯１２ａと一直線となるように固定されており、また、
面板２上のスウェ−ジロ−ラ６の位置も、スウェ−ジロ
−ラ６の先端の外周面が油井管２１の管端の外周面にほ
ぼ接するような位置に調整されているので、面取機１１
を前進させ続けると、スウェ−ジロ−ラ６の先端の外周
面が油井管２１の管端の外周面に接触する。Then, the chamfering machine 11 is advanced while rotating the spindle 12 to bring the swaging roller 6 closer to the end of the oil country tubular good 21 fixed by the chuck 14. Oil well pipe 2
1 is fixed in advance so that its axis 21a is aligned with the axis 12a of the spindle 12, and
The position of the swaging roller 6 on the face plate 2 is also adjusted to a position such that the outer peripheral surface of the tip of the swaging roller 6 is almost in contact with the outer peripheral surface of the pipe end of the oil country tubular good 21. Machine 11
, The outer peripheral surface of the tip of the swage roller 6 contacts the outer peripheral surface of the pipe end of the oil country tubular good 21.
【００２７】さらに面取機１１を前進させると、スウェ
−ジロ−ラ６が先端から後端に向けて外径が大きくなる
テ−パ−ロ−ラとなっているので、油井管２１の管端部
分には、スウェ−ジロ−ラ６によって、図２に示すよう
に、スウェ−ジロ−ラ６のテ−パ−にしたがったテ−パ
−部、すなわち口絞り部２１ｂが一定の長さＬにわたっ
て形成される。When the chamfering machine 11 is further advanced, the swage roller 6 becomes a taper roller whose outer diameter increases from the front end to the rear end. As shown in FIG. 2, a taper portion in accordance with the taper of the swage roller 6, that is, an aperture portion 21b is fixed to an end portion by the swage roller 6, as shown in FIG. L is formed.
【００２８】このような口絞り加工により、内径Ｄ0 の
油井管２１に口元（管端）径Ｄｓの口絞り部２１ｂが形
成されたときの口絞り率αは、次の式（１）により表さ
れる。 α＝｛１−（Ｄｓ／Ｄ0 ）｝×１００（％）……（１） 内径１１１．９６ｍｍ、外径１２７ｍｍの油井管に対し
て、テ−パ−角度７．By such a drawing process, when a drawing portion 21b having a mouth (pipe end) diameter Ds is formed in the oil country tubular good 21 having an inner diameter D 0 , the drawing ratio α is given by the following equation (1). expressed. α = {1− (Ds / D 0 )} × 100 (%) (1) A taper angle of 7.09 with respect to an oil country tubular good having an inner diameter of 111.96 mm and an outer diameter of 127 mm.
【００２９】５９°のスウェ−ジロ−ラで口絞り加工を
施したところ、口元の内径が１０８ｍｍ、口絞り範囲１
５ｍｍとなった。When a mouth drawing process was performed with a swivel roller of 59 °, the inside diameter of the mouth was 108 mm, and the mouth drawing range was 1
5 mm.
【００３０】これから、上記（１）式により口絞り率α
を算出すると、αは３．５％となるが、試験の結果口絞
り率がこの程度でも十分にメタルシ−ル部のシ−ル性を
高め得ることが確認できた。From this, the aperture ratio α is calculated by the above equation (1).
Is calculated to be 3.5%, but as a result of the test, it was confirmed that even at such a narrowing ratio, the sealability of the metal seal portion can be sufficiently improved.
【００３１】[0031]
【発明の効果】この発明により、油井管の口絞り加工の
ために専用の機械を必要とせず、ネジ切り加工前に設置
されている面取り機を用いて口絞り加工が可能であるの
で、製造費を上昇させることなく、油井管のネジ継手の
シ−ル性を向上させることができる。According to the present invention, a special machine is not required for the drawing process of an oil country tubular good, and the drawing process can be performed using a chamfering machine installed before the thread cutting process. The sealability of the threaded joint of the oil country tubular goods can be improved without increasing the cost.
【図１】この発明の実施の形態の油井管の管端口絞り治
具を面取機に装着した状態を表す断面図である。FIG. 1 is a cross-sectional view illustrating a state in which a jig for drawing a pipe end of an oil country tubular good according to an embodiment of the present invention is mounted on a chamfering machine.
【図２】口絞りされた油井管の縦断面図である。FIG. 2 is a longitudinal sectional view of an oil country tubular good whose port is narrowed.
【図３】油井管のネジ継手部の説明図である。FIG. 3 is an explanatory view of a threaded joint of an oil country tubular good;
１ 口絞り治具 ２ 面板 ３ 回転支軸支持部材 ４ 回転支軸 ５ ベアリング ６ スウェ−ジロ−ラ １１ 面取機 １２ スピンドル １３ スピンドルヘッド １４ チャック DESCRIPTION OF SYMBOLS 1 Mouth drawing jig 2 Face plate 3 Rotation support shaft 4 Rotation support 5 Bearing 6 Swage roller 11 Chamferer 12 Spindle 13 Spindle head 14 Chuck
Claims (2)
成されるメタルシ−ル部の肉厚を確保するための油井管
の管端口絞り加工方法であって、油井管の管端内面のベ
ベル加工を行うための面取機のスピンドルヘッドに、複
数のスウェ−ジロ−ラを備えた口絞り治具を装着し、前
記面取機の回転力および推進力を利用して前記口絞り治
具により、前記油井管の管端口絞り加工を行うことを特
徴とする油井管の管端口絞り加工方法。An oil well pipe end drawing method for securing the thickness of a metal seal portion formed at the tip of a threaded joint provided at the end of an oil well pipe. A mouth drawing jig provided with a plurality of swaging rollers is mounted on a spindle head of a chamfering machine for performing beveling, and the mouth drawing jig is used by utilizing a rotational force and a propulsive force of the chamfering machine. A pipe end drawing process of the oil country tubular good, wherein the pipe end drawing process of the oil country tubular good is performed by a tool.
工方法に使用する口絞り治具であって、前記面取機のス
ピンドルヘッドに装着可能で、板面がスピンドルヘッド
の回転軸と直交する面板と、この面板のスピンドルヘッ
ドに装着される側とは反対側の板面上に、配置位置がス
ピンドルヘッドの軸芯を中心とした一定半径の円形軌跡
上に位置するように配置され、回転軸がスピンドルヘッ
ドの回転軸と平行な複数の無駆動スウェ−ジロ−ラとか
ら構成されることを特徴とする油井管の口絞り治具。2. A drawing jig used in the method for drawing a pipe end of an oil country tubular good according to claim 1, wherein the jig can be mounted on a spindle head of the chamfering machine, and a plate surface is a rotating shaft of the spindle head. And a face plate that is perpendicular to the surface plate, and is arranged on a plate surface opposite to the side where the face plate is mounted on the spindle head such that the arrangement position is located on a circular locus of a constant radius centered on the axis of the spindle head. And a rotary jig having a plurality of non-driving swage rollers having a rotation axis parallel to the rotation axis of the spindle head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27535397A JPH11114640A (en) | 1997-10-08 | 1997-10-08 | Pipe end opening drawing method for oil country tubular goods and opening drawing jig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27535397A JPH11114640A (en) | 1997-10-08 | 1997-10-08 | Pipe end opening drawing method for oil country tubular goods and opening drawing jig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11114640A true JPH11114640A (en) | 1999-04-27 |
Family
ID=17554298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27535397A Pending JPH11114640A (en) | 1997-10-08 | 1997-10-08 | Pipe end opening drawing method for oil country tubular goods and opening drawing jig |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11114640A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100476723B1 (en) * | 2002-06-01 | 2005-03-16 | 호일정공 주식회사 | Device and method for autside diameter join of a pipe |
| CN102921823A (en) * | 2012-11-26 | 2013-02-13 | 宁波培源电器制造有限公司 | Oil storing barrel sealing machine of motorcycle rear shock absorber |
| CN103586360A (en) * | 2012-08-14 | 2014-02-19 | 珠海格力电器股份有限公司 | Clamping die for pipe end forming machine |
-
1997
- 1997-10-08 JP JP27535397A patent/JPH11114640A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100476723B1 (en) * | 2002-06-01 | 2005-03-16 | 호일정공 주식회사 | Device and method for autside diameter join of a pipe |
| CN103586360A (en) * | 2012-08-14 | 2014-02-19 | 珠海格力电器股份有限公司 | Clamping die for pipe end forming machine |
| CN103586360B (en) * | 2012-08-14 | 2016-02-03 | 珠海格力电器股份有限公司 | Clamping die for pipe end forming machine |
| CN102921823A (en) * | 2012-11-26 | 2013-02-13 | 宁波培源电器制造有限公司 | Oil storing barrel sealing machine of motorcycle rear shock absorber |
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