JP2001239322A - Method of machining internal thread of pipe and equipment therefor - Google Patents
Method of machining internal thread of pipe and equipment thereforInfo
- Publication number
- JP2001239322A JP2001239322A JP2000095863A JP2000095863A JP2001239322A JP 2001239322 A JP2001239322 A JP 2001239322A JP 2000095863 A JP2000095863 A JP 2000095863A JP 2000095863 A JP2000095863 A JP 2000095863A JP 2001239322 A JP2001239322 A JP 2001239322A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- cylinder
- thread
- mold
- piston
- 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
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、パイプの内部に雌
ねじを形成するパイプの雌ねじ加工方法及びその装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for forming a female screw in a pipe.
【０００２】[0002]
【従来の技術】従来パイプの内部に雌ねじを形成するパ
イプの異形加工方法においては、冷間におけるタップ加
工やスエージング加工があった。タップ加工は、ねじ切
り用のタップを使用してパイプの内部に雌ねじを形成す
るものであり、又、スエージンク加工は、ネジ山が形成
されたマンドレルをパイプの内部に挿入し、ロータリス
エージング機を使用してパイプの外部より回転しながら
絞り込むものである。2. Description of the Related Art Conventionally, in a method of deforming a pipe in which an internal thread is formed inside the pipe, tapping or swaging in a cold state has been used. Tapping is to form a female thread inside the pipe using a tap for threading, and swaging is to insert a threaded mandrel into the pipe and use a rotary aging machine. It is used to narrow down while rotating from the outside of the pipe.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前記タ
ップ加工によるパイプの異形加工方法においては、パイ
プの内部を削る切削加工であり、切削屑が発生するので
材料が無駄になると共に、切削速度を一定以上に上げら
れないので作業能率が悪いという問題があった。また、
スエージンク加工によるパイプの異形加工方法において
は、冷間において硬くなっている金属を強引に塑性変形
させるので、そのための金型は大型になり、しかも金型
を回転させるロータリ式なので、付属設備も大型にな
り、設備投資額が高くなるという問題があった。However, in the method of deforming a pipe by tapping as described above, cutting is performed to cut the inside of the pipe. Since cutting chips are generated, material is wasted and the cutting speed is kept constant. There was a problem that the working efficiency was poor because it could not be raised above. Also,
In the deforming method of pipes by swaging, the metal that is hardened in the cold is forcibly plastically deformed, so the mold for that is large, and the rotary equipment that rotates the mold is large, so the attached equipment is also large. And there is a problem that the capital investment amount increases.
【０００４】本発明は、上述した従来技術の問題に鑑み
てなされたもので、高能率で生産性を上げ、大幅なコス
ト低減を行うことができるパイプの雌ねじ加工方法及び
その装置の提供を課題とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide an internal threading method for a pipe capable of increasing productivity with high efficiency and greatly reducing costs, and an apparatus therefor. And
【０００５】[0005]
【課題を解決するための手段】前記課題を解決した本発
明の第１の態様は、パイプの内部に雌ねじを形成するパ
イプの雌ねじ加工方法であって、予め前記パイプを加熱
手段により所定の温度に加熱し、加熱された高温の前記
パイプの内部に押込みピストンにより液体または気体か
らなる流体を圧縮して押し込み、前記パイプの外部より
ねじ山状凹凸が形成された金型を用いて加圧し前記パイ
プの内部に雌ねじを形成する構成としたものである。According to a first aspect of the present invention, there is provided a female thread forming method for forming a female thread inside a pipe, wherein the pipe is previously heated to a predetermined temperature by a heating means. To the inside of the heated high-temperature pipe, press and compress a fluid composed of liquid or gas by a pushing piston, and pressurize using a mold having thread-shaped irregularities formed from the outside of the pipe. In this configuration, a female screw is formed inside the pipe.
【０００６】前記課題を解決した本発明の第２の態様
は、前記第１の態様において、押込みピストンと中間金
型を用い、押込みピストンにより前記パイプに軸方向圧
縮力を加えつつ、前記押込みピストンの軸方向移動に連
動して中間金型を移動する複合型バルジ加工により行う
ことを特徴とするものである。According to a second aspect of the present invention which solves the above-mentioned problems, in the first aspect, the pushing piston and an intermediate mold are used, and the pushing piston applies an axial compressive force to the pipe by the pushing piston. In which the intermediate dies are moved in conjunction with the axial movement of the dies.
【０００７】前記課題を解決した本発明の第３の態様
は、パイプの内部に雌ねじを形成する管の雌ねじ加工装
置であって、予め前記パイプを所定の温度に加熱する加
熱手段と、前記パイプの長手方向の少なくとも一端に加
圧流体供給用貫通孔を有し着脱可能な端壁を備えたシリ
ンダと、前記シリンダの内部に軸方向摺動可能に収容さ
れ前記パイプの両管端の各々を保持する管端用金型兼押
込みピストンと、圧縮状態においては内面がねじ山状凹
凸を呈するように形成され、前記ねじ山状凹凸の凹部に
沿って分割され前記シリンダ内部に軸方向摺動可能に収
容された中間金型と、前記管端用金型兼押込みピストン
と中間金型の内部に配設され前記パイプの内面に流体圧
を作用せしめる加圧手段と、を備えることを特徴とする
ものである。A third aspect of the present invention, which has solved the above-mentioned problems, is a female threading apparatus for forming a female thread inside a pipe, comprising: heating means for heating the pipe to a predetermined temperature in advance; A cylinder having a pressurized fluid supply through hole at at least one end in the longitudinal direction and having a detachable end wall, and each of the two pipe ends of the pipe accommodated inside the cylinder so as to be slidable in the axial direction. A tube end mold and push piston to be held, and an inner surface formed in a compressed state so as to have a thread-shaped unevenness, which is divided along the recessed portion of the thread-shaped unevenness and can be axially slid into the cylinder. And a pressurizing means disposed inside the intermediate mold and for applying a fluid pressure to the inner surface of the pipe. Things.
【０００８】[0008]
【発明の実施の形態】本発明に係るパイプの雌ねじ加工
方法及びその装置の実施の形態について、添付の図面を
参照して以下に説明する。図１は本実施の形態のパイプ
の雌ねじ加工装置の加工前の状態を示す縦断面図、図２
は本実施の形態のパイプの雌ねじ加工装置の加工後の状
態を示す縦断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a method and apparatus for internally threading a pipe according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view showing a state before machining by a pipe female thread machining apparatus of the present embodiment,
FIG. 2 is a longitudinal sectional view showing a state after machining of the pipe female thread machining device of the present embodiment.
【０００９】本発明に係るパイプの雌ねじ加工装置は、
予め素材のパイプＰを所定の温度に加熱する図示しない
加熱手段を有しており、図１及び図２に示すように、パ
イプＰの長手方向の少なくとも一端に加圧流体供給用貫
通孔１ｃを有し着脱可能な端壁１ａ及び貫通孔のない端
壁１ｂとを備えたシリンダ１と、前記シリンダ１の内部
に軸方向摺動可能に収容され前記パイプＰの両管端の各
々を保持する管端用金型兼押込みピストン２，３と、圧
縮状態においては図２に示されるように内面が雌ねじ４
の形状を呈するように形成され、この雌ねじの谷にそっ
て分割されてコイルスプリング状に形成されると共に、
前記シリンダ１の内部に軸方向摺動可能に収容された中
間金型５と、前記管端用金型兼押込みピストン２，３と
中間金型５の内部に挿入・セットされた前記パイプＰの
内面に流体圧を作用せしめる図示せぬ加圧手段と、を備
えて主要部が構成されている。An apparatus for processing a female thread of a pipe according to the present invention comprises:
A heating means (not shown) for heating the material pipe P to a predetermined temperature is provided in advance. As shown in FIGS. 1 and 2, a pressurized fluid supply through hole 1c is provided at at least one end in the longitudinal direction of the pipe P. A cylinder 1 having a detachable end wall 1a and an end wall 1b having no through hole, and each of the two pipe ends of the pipe P held inside the cylinder 1 so as to be slidable in the axial direction. As shown in FIG. 2, in the compressed state, the inner surface is formed with a female screw 4
And formed along the valley of the female screw to form a coil spring,
An intermediate mold 5 accommodated in the cylinder 1 so as to be slidable in the axial direction, a pipe end mold / pressing piston 2, 3 and the pipe P inserted and set inside the intermediate mold 5. The main part is provided with a pressure means (not shown) for applying a fluid pressure to the inner surface.
【００１０】前記の加熱手段は図示しないが通常のパイ
プの全長を同時に均一に加熱する加熱装置でよく、例え
ば、高周波加熱装置、燃料ガス燃焼型加熱装置等が使用
される。The heating means may be a heating device (not shown) for heating the entire length of a normal pipe simultaneously and uniformly, for example, a high-frequency heating device, a fuel gas combustion type heating device or the like is used.
【００１１】また、加圧手段としては、図示を省略する
が、予熱され前記金型に挿入・セットされたパイプＰを
冷却しないため、装置の許容される限度まで加熱された
加圧流体である圧縮気体や液体を前記端壁１ａに設けら
れた加圧流体供給用貫通孔１ｃからシリンダ１内に導入
するように構成されている。Although not shown, the pressurizing means is a pressurized fluid heated to a permissible limit of the apparatus because the pipe P is not preheated and does not cool the pipe P inserted and set in the mold. The compressed gas or liquid is introduced into the cylinder 1 through a pressurized fluid supply through hole 1c provided in the end wall 1a.
【００１２】なお、本実施の形態においては、パイプの
バルジ加工の障害とならないように、前記シリンダ１の
周壁にはシリンダ１の外部と内部のパイプＰの外周の空
間を連通する空気抜き孔１ｄが適宜設けられている。In the present embodiment, an air vent hole 1d is formed in the peripheral wall of the cylinder 1 to communicate the space between the outside of the cylinder 1 and the outer periphery of the pipe P so as not to hinder the bulging of the pipe. It is provided as appropriate.
【００１３】前記のように構成されたパイプの雌ねじ加
工装置によるパイプの雌ねじ加工方法について以下に説
明する。先ず、パイプＰ全体を前記加熱手段の高周波加
熱装置や燃料ガス燃焼型加熱装置等を用いて所定の温度
に加熱しておく。A method for machining a female thread of a pipe by the female thread machining apparatus configured as described above will be described below. First, the entire pipe P is heated to a predetermined temperature by using a high-frequency heating device or a fuel gas combustion type heating device of the heating means.
【００１４】次に、この加熱されたパイプＰをシリンダ
１内に挿入してセットする。この工程は、予めシリンダ
１の端壁１ａを外しておき管端用金型兼押込みピストン
２をシリンダ１内から取り出しておく。そして、全長を
所定の温度に加熱されたパイプＰを、図１に示すよう
に、管端用金型兼押込みピストン３とコイルスプリング
状に延ばされた中間金型５に挿入・セットする。さら
に、管端用金型兼押込みピストン２をシリンダ１内に挿
入しパイプＰの一端を保持させた後、シリンダ１の端壁
１ａを再び取り付ける。Next, the heated pipe P is inserted into the cylinder 1 and set. In this step, the end wall 1a of the cylinder 1 is removed in advance, and the pipe-end mold / pushing piston 2 is taken out of the cylinder 1. Then, as shown in FIG. 1, the pipe P whose entire length has been heated to a predetermined temperature is inserted and set in a tube end mold / pressing piston 3 and an intermediate mold 5 extended in a coil spring shape. Furthermore, after inserting the pipe end mold / pushing piston 2 into the cylinder 1 and holding one end of the pipe P, the end wall 1a of the cylinder 1 is attached again.
【００１５】次いで、バルジ加工を行うものである。こ
の工程は、端壁１ａの貫通孔１ｃに図示せぬ高圧空気供
給手段を接続し、パイプＰの内面に空気圧を作用させ
る。その結果、パイプＰの隣り合うねじ山５ａ，５ａに
支持されない部分が外側へ膨出し、前記隣り合うねじ山
５ａ，５ａの間の空間６，６の空気が空気抜き孔１ｄを
通ってシリンダ１の外側へ押し出される。それと共に、
パイプＰの管端を保持する管端用金型兼押込みピストン
２，３がそれぞれ矢印（イ）、（ロ）の方向に押し込ま
れ、前記のような素材管Ｐの外側への膨出分を補うの
で、素材管が押込み不足で破断することはない。そし
て、図２に示すように、中間金型５の隣り合う山５ａ，
５ａの裾同士が接触するまで、前記のような動きが進行
しパイプＰにねじ山状凹凸が形成される。Next, bulging is performed. In this step, high-pressure air supply means (not shown) is connected to the through hole 1c of the end wall 1a to apply air pressure to the inner surface of the pipe P. As a result, the portion of the pipe P that is not supported by the adjacent threads 5a, 5a bulges outward, and the air in the spaces 6, 6 between the adjacent threads 5a, 5a passes through the air vent hole 1d, and It is pushed out. With it
The pipe end mold and push pistons 2 and 3 for holding the pipe end of the pipe P are pushed in the directions of arrows (a) and (b), respectively. Since it compensates, the material tube does not break due to insufficient pushing. Then, as shown in FIG.
Until the bottoms of 5a come into contact with each other, the above-described movement proceeds, and thread-like irregularities are formed on the pipe P.
【００１６】次いで、シリンダ１よりパイプＰを取り出
す。この工程は、シリンダ１の端壁１ａを外し、管端用
金型兼押込みピストン２をシリンダ１内から取り出して
おく。そして、中間金型５と共にねじ山状凹凸が形成さ
れたパイプＰを外へ取り出し、両者を逆方向に回転させ
て、パイプＰを中間金型５から取り出す。Next, the pipe P is taken out of the cylinder 1. In this step, the end wall 1a of the cylinder 1 is removed, and the pipe-end mold / pushing piston 2 is taken out of the cylinder 1. Then, the pipe P on which the thread-shaped unevenness is formed is taken out together with the intermediate mold 5, and the two are rotated in opposite directions to take out the pipe P from the intermediate mold 5.
【００１７】以上に請求項２に係る本発明の管の雌ねじ
加工装置および請求項３に係る本発明のパイプの雌ねじ
加工方法について説明したが、本発明は上述した実施の
形態に限定されるものではない。例えば、図１の端壁１
ａのみに貫通孔１ｃを設けシリンダ１への着脱可能とし
たが、端壁１ｂにも貫通孔１ｃを設けシリンダ１への着
脱可能としてもよい。Although the pipe female thread machining apparatus of the present invention according to claim 2 and the pipe female thread machining method of the present invention according to claim 3 have been described above, the present invention is limited to the above-described embodiment. is not. For example, the end wall 1 of FIG.
Although only the through-hole 1c is provided in the cylinder 1 to be detachable from the cylinder 1, the through-hole 1c may also be provided in the end wall 1b so as to be detachable from the cylinder 1.
【００１８】[0018]
【発明の効果】本発明によれば、パイプの内部に雌ねじ
を形成するパイプの雌ねじ加工方法であって、予め前記
パイプを加熱手段により所定の温度に加熱し、加熱され
た高温のパイプの内部に押込みピストンにより液体また
は気体からなる流体を圧縮して押し込み、前記パイプの
外部よりねじ山状凹凸が形成された金型を用いて前記パ
イプにねじ山状凹凸を形成することにより、高能率で生
産性を上げ、大幅なコスト低減を行うことができるパイ
プの雌ねじ加工が可能となる。According to the present invention, there is provided a method for forming a female screw in a pipe, wherein the pipe is previously heated to a predetermined temperature by a heating means, and the inside of the high-temperature pipe is heated. By compressing and pushing a fluid consisting of liquid or gas by a pushing piston, and forming a thread-like unevenness on the pipe by using a mold having thread-like unevenness formed from the outside of the pipe, with high efficiency The internal thread processing of the pipe which can raise productivity and reduce cost significantly becomes possible.
【図１】本発明に係るパイプの雌ねじ加工装置の加工前
の状態を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a state before machining of a female thread machining device for a pipe according to the present invention.
【図２】本発明に係るパイプの雌ねじ加工装置の加工後
の状態を示す縦断面図である。FIG. 2 is a longitudinal sectional view showing a state after processing of the pipe female thread processing apparatus according to the present invention.
１ シリンダ １ａ 端壁 １ｂ 端壁 １ｃ 加圧流体供給用貫通孔 １ｄ 空気抜き孔 ２ 管端用金型兼押込みピストン ２ｈ 貫通孔 ３ 管端用金型兼押込みピストン ３ｈ 貫通孔 ４ 雌ねじ ５ 中間金型 ５ａ ねじ山 ６ 空間 Ｐ パイプ DESCRIPTION OF SYMBOLS 1 Cylinder 1a End wall 1b End wall 1c Pressurized fluid supply through hole 1d Air vent hole 2 Pipe end mold and push piston 2h Through hole 3 Pipe end mold and push piston 3h Through hole 4 Female screw 5 Intermediate mold 5a Thread 6 Space P Pipe
Claims (3)
の雌ねじ加工方法であって、 予め前記パイプを加熱手段により所定の温度に加熱し、 加熱された高温のパイプの内部に押込みピストンにより
液体または気体からなる流体を圧縮して押し込み、 前記パイプの外部よりねじ山状凹凸が形成された金型を
用いて前記パイプにねじ山状凹凸を形成することを特徴
とするパイプの雌ねじ加工方法。1. A method for forming a female thread in a pipe, wherein the pipe is internally heated to a predetermined temperature by a heating means, and the pipe is pressed into a heated high-temperature pipe and a liquid or a liquid is formed by a piston. A female thread forming method for a pipe, comprising compressing and pushing a gaseous fluid, and forming a thread-shaped unevenness on the pipe using a mold having thread-shaped unevenness formed from outside the pipe.
みピストンにより前記素材管体に軸方向圧縮力を加えつ
つ、前記押込みピストンの軸方向移動に連動して中間金
型を移動する複合型バルジ加工により行うことを特徴と
するパイプの雌ねじ加工方法。2. A composite bulge that uses a pushing piston and an intermediate mold and moves the intermediate mold in conjunction with the axial movement of the pushing piston while applying an axial compressive force to the material tube by the pushing piston. A method for processing a female thread of a pipe, the method being performed by processing.
ねじ加工装置であって、 予め前記パイプを所定の温度に加熱する加熱手段と、 前記パイプの長手方向の少なくとも一端に加圧流体供給
用貫通孔を有し着脱可能な端壁を備えたシリンダと、 前記シリンダの内部に軸方向摺動可能に収容され前記パ
イプの両管端の各々を保持する管端用金型兼押込みピス
トンと、 圧縮状態においては内面がねじ山状凹凸を呈するように
形成され、前記ねじ山状凹凸の凹部に沿って分割され前
記シリンダ内部に軸方向摺動可能に収容された中間金型
と、 前記管端用金型兼押込みピストンと中間金型の内部に配
設され前記パイプの内面に流体圧を作用せしめる加圧手
段と、 を備えることを特徴とするパイプの雌ねじ加工装置。3. A female thread forming apparatus for forming a female thread inside a pipe, comprising: a heating means for heating the pipe to a predetermined temperature in advance; and a pressurized fluid supply means for supplying a pressurized fluid to at least one longitudinal end of the pipe. A cylinder having a through hole and a detachable end wall, a pipe end mold and push piston which is accommodated in the cylinder so as to be slidable in the axial direction and holds each of both pipe ends of the pipe, An intermediate mold which is formed so that an inner surface thereof has a thread-like unevenness in a compressed state, is divided along the recess of the thread-like unevenness, and is accommodated in the cylinder so as to be slidable in the axial direction; And a pressurizing means disposed inside the intermediate mold and a press-fitting piston for applying fluid pressure to the inner surface of the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000095863A JP2001239322A (en) | 2000-02-24 | 2000-02-24 | Method of machining internal thread of pipe and equipment therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000095863A JP2001239322A (en) | 2000-02-24 | 2000-02-24 | Method of machining internal thread of pipe and equipment therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001239322A true JP2001239322A (en) | 2001-09-04 |
Family
ID=18610709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000095863A Pending JP2001239322A (en) | 2000-02-24 | 2000-02-24 | Method of machining internal thread of pipe and equipment therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001239322A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003103327A (en) * | 2001-09-26 | 2003-04-08 | Honda Motor Co Ltd | Manufacturing method for hollow member |
| JP2012006042A (en) * | 2010-06-24 | 2012-01-12 | Tokyo Metropolitan Univ | Pipe machining device and method |
| JP7512826B2 (en) | 2020-10-01 | 2024-07-09 | 株式会社大林組 | Grout injection structure, segment equipped with said injection structure, and grout injection method |
-
2000
- 2000-02-24 JP JP2000095863A patent/JP2001239322A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003103327A (en) * | 2001-09-26 | 2003-04-08 | Honda Motor Co Ltd | Manufacturing method for hollow member |
| JP2012006042A (en) * | 2010-06-24 | 2012-01-12 | Tokyo Metropolitan Univ | Pipe machining device and method |
| JP7512826B2 (en) | 2020-10-01 | 2024-07-09 | 株式会社大林組 | Grout injection structure, segment equipped with said injection structure, and grout injection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3668918A (en) | Method for manufacturing shafts for vehicles | |
| US20110023568A1 (en) | Apparatus and method of hot bulge forming, and product formed by hot bulge forming | |
| US3292414A (en) | Apparatus for localized swaging of pipes | |
| JP2001518016A (en) | Forming technology using intermittent heating zones | |
| CN103691789A (en) | Method for forming end enclosure of large-sized thick-wall cylindrical blank in hot spinning manner | |
| JP2009050888A (en) | Method of expanding pipe | |
| US4625537A (en) | Localized boss thickening by cold swaging | |
| CN105107948A (en) | Mouth compressing mold for metal pipe end | |
| JP2012061501A (en) | Screw shaft for ball screw | |
| JP2001239322A (en) | Method of machining internal thread of pipe and equipment therefor | |
| JPH0694170A (en) | Manufacture of pipe joint for oil well | |
| JP2004291072A (en) | Working method of end of piping, and manufacturing method of piping joint with flange | |
| JP2013146751A (en) | Working method and working device for workpiece | |
| CN107520275A (en) | A kind of method that HTHP thick-wall seamless road squeezes the curved combined shaping of forging | |
| JP2008155214A (en) | Tube end-machining tool, and tube end-machining method using the same | |
| JP2004330246A (en) | Method for manufacturing fuel inlet | |
| JP3613789B2 (en) | Production method of pipe for hydroforming and pipe bender | |
| JP2002153917A (en) | Bulging method | |
| CN109365588A (en) | Thin-wall copper pipe intussusception brake forming tooling | |
| JPH07155857A (en) | Bulging device for pipe | |
| JP4428840B2 (en) | Hot bulge forming equipment | |
| JP2001239427A (en) | Female screw machining method of pipe, and its device | |
| JP2661981B2 (en) | Manufacturing method of pipe with projection | |
| KR19980072196A (en) | Method for manufacturing titanium bolt by cold rolling | |
| JPS59209453A (en) | Forming method of steel pipe |