JP2000210712A - Method for drawing and reducing metallic tube - Google Patents
Method for drawing and reducing metallic tubeInfo
- Publication number
- JP2000210712A JP2000210712A JP11018234A JP1823499A JP2000210712A JP 2000210712 A JP2000210712 A JP 2000210712A JP 11018234 A JP11018234 A JP 11018234A JP 1823499 A JP1823499 A JP 1823499A JP 2000210712 A JP2000210712 A JP 2000210712A
- Authority
- JP
- Japan
- Prior art keywords
- metal tube
- floating plug
- tube
- die
- 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
Landscapes
- Metal Extraction Processes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、金属管の引抜縮管
方法に関し、特に、偏肉の発生を防止した金属管の引抜
縮管方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for drawing and shrinking a metal tube, and more particularly to a method for drawing and shrinking a metal tube in which occurrence of uneven thickness is prevented.
【０００２】[0002]
【従来の技術】金属管の加工法として、浮きプラグと引
抜ダイスの組み合わせによる引抜縮管加工が広く行われ
ている。2. Description of the Related Art As a method of processing a metal tube, a drawing and shrinking tube process by a combination of a floating plug and a drawing die is widely performed.
【０００３】図３は、引抜縮管加工の全体図を示したも
ので、１は縮管される金属管、１２は金属管１を送り出
すバスケット、１３は金属管１を縮管加工するダイボッ
クス、１４は縮管された金属管１ａを巻き取るブロッ
ク、１５はブロック１４の上方に設けられたプッシュダ
ウンフランジ、１６は巻き取られた金属管１ａを押さえ
るスナバロール、１７は金属管１ａの先端を把持するチ
ャック、１８は落下する金属管１ａを受けるレシーババ
スケットを示し、作業は以下のようにして進められる。FIG. 3 is an overall view of drawing and shrinking tube processing, wherein 1 is a metal tube to be shrunk, 12 is a basket for feeding out the metal tube 1, and 13 is a die box for shrinking the metal tube 1. , 14 is a block for winding the reduced metal tube 1a, 15 is a push-down flange provided above the block 14, 16 is a snubber roll for holding the wound metal tube 1a, and 17 is a tip of the metal tube 1a. The chuck 18 to be gripped represents a receiver basket for receiving the falling metal tube 1a, and the operation proceeds as follows.
【０００４】まず、金属管１の先端に設けた口付け部を
チャック１７に固定し、ブロック１４を回転させる。下
方に位置していたダイボックス１３がこの回転によって
上昇し、図のようにプッシュダウンフランジ１５と同じ
高さで停止する。[0004] First, a mouth portion provided at the tip of the metal tube 1 is fixed to the chuck 17, and the block 14 is rotated. The die box 13 located below is raised by this rotation and stops at the same height as the push-down flange 15 as shown in the figure.
【０００５】次に、この状態でブロック１４を５〜１０
回回転させて金属管１ａを巻き取った後、先端の口付け
部をチャック１７から解放する。これによって金属管１
ａはプッシュダウンフランジ１５に押されてブロック１
４上を滑落し、レシーババスケット１８に落下して連続
した引抜縮管作業が進行する。Next, in this state, the block 14 is changed to 5-10.
After rotating the metal tube 1a by rotating it, the mouth portion at the tip is released from the chuck 17. Thereby, the metal tube 1
a is pushed by the push-down flange 15 and the block 1
4 and slides down onto the receiver basket 18 to continue the continuous drawing and contracting operation.
【０００６】図４は、ダイボックス１３の構成を示した
もので、金属管１は、その内部に入れられた浮きプラグ
２のテーパ部５と、金属管１の外側に配置された引抜ダ
イス９のテーパ孔１０の間で縮管され、所定のサイズの
金属管１ａとなって引き抜かれる。１１は引き抜かれる
金属管１ａの偏肉を防止するために金属管１を調芯して
浮きプラグ２側に供給するガイドダイスを示す。FIG. 4 shows the structure of the die box 13. The metal tube 1 has a tapered portion 5 of a floating plug 2 inserted therein and a drawing die 9 disposed outside the metal tube 1. Between the tapered holes 10, and the metal tube 1a having a predetermined size is pulled out. Reference numeral 11 denotes a guide die for aligning the metal tube 1 and supplying it to the floating plug 2 side in order to prevent the metal tube 1a from being uneven in thickness.
【０００７】図５は、引抜縮管作業の準備段階における
金属管１と浮きプラグ２の関係を示す。図５（ａ）のよ
うに、金属管１の先端には、チャック１７に固定するた
めの口付け部１９が設けられる。FIG. 5 shows the relationship between the metal tube 1 and the floating plug 2 in the preparation stage of the drawing and shrinking tube operation. As shown in FIG. 5A, a mouth 19 for fixing to the chuck 17 is provided at the tip of the metal tube 1.
【０００８】浮きプラグ２の前後には圧潰部２０と２１
が形成されており、浮きプラグ２は、これにより金属管
１の中で所定の位置に位置決めされる。圧潰部２０、２
１の形成は、ハンマーあるいはプレス等により金属管１
を上下から潰すことによって行われるのが普通である。Before and after the floating plug 2, crushing portions 20 and 21 are provided.
The floating plug 2 is thereby positioned at a predetermined position in the metal tube 1. Crushing part 20, 2
The metal tube 1 is formed by a hammer or a press.
It is usually done by crushing from above and below.
【０００９】図５（ｂ）は、圧潰部２０と２１の断面を
示したもので、押し潰された偏平な断面構造を呈してお
り、さらに、これら圧潰形部２０、２１は、この偏平構
造のために金属管１の外径よりも突出して形成されてい
る。FIG. 5 (b) shows a cross section of the crushed portions 20 and 21. The crushed portions 20 and 21 have a flat cross-sectional structure. Therefore, it is formed so as to protrude from the outer diameter of the metal tube 1.
【００１０】図４のガイドダイス１１の調芯孔１１ａ
は、この突出を許容する内径寸法を有しており、通常、
調芯孔１１ａの内径ｄ0 と金属管１の外径Ｄ0 との間に
は、金属管１の外径Ｄ0 の１０〜１５％程度のクリアラ
ンスが設定され、これによって圧潰部２０、２１が調芯
孔１１ａを通過できるように構成される。The alignment hole 11a of the guide die 11 shown in FIG.
Has an inner diameter that allows this protrusion,
Between the Choshin'ana 11a inside diameter d 0 and the outer diameter D 0 of the metal tube 1, 10-15% about of the clearance of the outer diameter D 0 of the metal tube 1 is set, thereby pinch 20,21 Is configured to pass through the alignment hole 11a.
【００１１】[0011]
【発明が解決しようとする課題】しかし、従来の金属管
の引抜縮管方法によると、金属管１と調芯孔１１ａの間
に設定されるクリアランスが過大であるために、ガイド
ダイス１１によるガイド効果が不充分なものとなり、こ
のため、浮きプラグ２と引抜ダイス９に導入される金属
管１に振れが生じ、引抜縮管された金属管１ａに偏肉を
発生させることがある。However, according to the conventional method of drawing and shrinking a metal pipe, the clearance set between the metal pipe 1 and the alignment hole 11a is too large, so that the guide by the guide die 11 is not sufficient. As a result, the effect is insufficient, and the metal tube 1 introduced into the floating plug 2 and the drawing die 9 oscillates, which may cause uneven thickness in the drawn and reduced metal tube 1a.
【００１２】従って、本発明の目的は、偏肉の発生しな
い金属管の引抜縮管方法を提供することにある。Accordingly, an object of the present invention is to provide a method for drawing and shrinking a metal pipe without uneven thickness.
【００１３】[0013]
【課題を解決するための手段】本発明は、上記の目的を
達成するため、外面にテーパ部を有する浮きプラグを金
属管の中に入れ、前記金属管を前記浮きプラグの前後の
部分で変形して前記浮きプラグを前記金属管の中で位置
決めし、前記金属管を所定の内径の調芯孔を有するガイ
ドダイスを通してテーパ孔を有する引抜ダイスに引き込
んで前記浮きプラグの前記テーパ部と前記引抜ダイスの
前記テーパ孔の間で前記金属管を所定のサイズに縮管す
る金属管の引抜縮管方法において、前記金属管を変形す
る工程は、前記金属管の管壁を内側へ塑性変形させて外
径縮小部を形成する工程を含み、前記金属管を前記ガイ
ドダイスの前記調芯孔に通す工程は、前記金属管の外径
と同一、あるいはそれと近似の内径の前記調芯孔を有す
る前記ガイドダイスを準備する工程の後に行われること
を特徴とする金属管の引抜縮管方法を提供するものであ
る。According to the present invention, in order to achieve the above object, a floating plug having a tapered portion on an outer surface is inserted into a metal tube, and the metal tube is deformed at portions before and after the floating plug. The floating plug is positioned in the metal pipe, and the metal pipe is drawn into a drawing die having a tapered hole through a guide die having a centering hole having a predetermined inner diameter, and the tapered portion of the floating plug and the drawing are drawn out. In the metal tube drawing and shrinking method for shrinking the metal tube to a predetermined size between the tapered holes of a die, the step of deforming the metal tube includes plastically deforming a tube wall of the metal tube inward. The method includes the step of forming an outer diameter reduction portion, and the step of passing the metal tube through the alignment hole of the guide die has the alignment hole having an inner diameter equal to or close to the outer diameter of the metal tube. Guide die It is performed after the step of preparing a there is provided a drawn contraction tube method for a metal tube, characterized in.
【００１４】上記の金属管としては、銅管、銅合金管、
アルミニウム管、あるいはアルミニウム合金管などが適
用される。ガイドダイスの調芯孔の内径は、金属管の外
径と同じにすることが好ましいが、近似に設定するケー
スも多く、その場合、金属管の外径よりも小さく設定す
ることが好ましい。このようにするときには、ガイドダ
イスによって金属管の変形を矯正できるので、より高度
な偏肉防止効果が得られるようになる。As the above-mentioned metal tube, a copper tube, a copper alloy tube,
An aluminum tube or an aluminum alloy tube is applied. The inner diameter of the alignment hole of the guide die is preferably set to be the same as the outer diameter of the metal tube. In many cases, however, the inner diameter is set to be smaller than the outer diameter of the metal tube. In this case, the deformation of the metal pipe can be corrected by the guide die, so that a higher wall thickness unevenness preventing effect can be obtained.
【００１５】圧潰部に外径縮小部を形成する手段として
は、ロールによる方法が好ましい。金属管の外周で複数
のロールを自転させながら公転させ、この公転の軌跡の
半径を減じて行くことによって外径縮小部を形成する方
法が最適である。外径縮小部を形成した後に公転の軌跡
の半径が増加させられ、金属管はロールから外される。As a means for forming the outer diameter reduced portion in the crushed portion, a method using a roll is preferable. An optimal method is to form a reduced outer diameter portion by revolving a plurality of rolls around the outer circumference of a metal tube while rotating, and reducing the radius of the revolving locus. After forming the outer diameter reduction portion, the radius of the orbit of the revolution is increased, and the metal tube is removed from the roll.
【００１６】[0016]
【発明の実施の形態】次に、本発明による金属管の引抜
縮管方法の実施の形態について説明する。図１におい
て、１は金属管、２は金属管１の中に入れられた浮きプ
ラグを示し、大径部３と小径部４の間に縮管作用をする
テーパ部５が形成されている。Next, an embodiment of a method for drawing and shrinking a metal pipe according to the present invention will be described. In FIG. 1, reference numeral 1 denotes a metal pipe, 2 denotes a floating plug placed in the metal pipe 1, and a tapered portion 5 for contracting a tube is formed between a large diameter portion 3 and a small diameter portion 4.
【００１７】図２（ａ）、（ｂ）は、引抜縮管を行う前
の金属管１と浮きプラグ２の関係を示したもので、浮き
プラグ２は、ロール８によって形成された外径縮小部
６、７により所定の位置に位置決めされている。金属管
１の内部には、浮きプラグ２が入れられる前に所定の量
の引抜加工油が注入される。FIGS. 2A and 2B show the relationship between the metal tube 1 and the floating plug 2 before drawing and shrinking. The floating plug 2 has a reduced outer diameter formed by the roll 8. The parts are positioned at predetermined positions by the parts 6 and 7. A predetermined amount of drawing oil is injected into the metal tube 1 before the floating plug 2 is inserted.
【００１８】ロール８は、シャフト８ａを軸にしてフリ
ーに自転し、金属管１の周りを矢印Ｃの方向に公転す
る。また、これら３個の圧潰ロール８は、それぞれ矢印
Ｅの方向に動くことによって公転の軌跡の半径を増減で
きるように構成されており、公転の軌跡の半径を減じる
ことによって金属管１の管壁を内側に塑性変形させる。
この結果、外径縮小部６、７が形成され、その後、半径
を増加させて金属管１から外される。The roll 8 rotates freely around the shaft 8a and revolves around the metal tube 1 in the direction of arrow C. Each of the three crushing rolls 8 is configured to be able to increase or decrease the radius of the orbit by moving in the direction of arrow E. Is plastically deformed inward.
As a result, the outer diameter reduction portions 6 and 7 are formed, and thereafter, the radius is increased and the outer diameter reduction portions 6 and 7 are removed from the metal tube 1.
【００１９】図１は、以上のようにして浮きプラグ２を
内蔵させた金属管１をガイドダイス１１の調芯孔１１ａ
に通し、さらに、引抜ダイス９に引き込んだ状態を示し
たもので、金属管１は、浮きプラグ２のテーパ部５と引
抜ダイス９のテーパ孔１０の相互作用によって所定のサ
イズに縮管され、金属管１ａとなって引き抜かれる。FIG. 1 shows a metal tube 1 in which a floating plug 2 is incorporated as described above, and a centering hole 11 a of a guide die 11.
The metal tube 1 is drawn into a predetermined size by the interaction between the tapered portion 5 of the floating plug 2 and the tapered hole 10 of the drawing die 9. The metal tube 1a is pulled out.
【００２０】金属管１の外径縮小部６と７は、ガイドダ
イス１１を通過するときに支障となる部分がなく、従っ
て、ガイドダイス１１は、その調芯孔１１ａの内径を金
属管１の外径と同じか近似に設定することが可能とな
る。The outer diameter reducing portions 6 and 7 of the metal tube 1 do not have any obstructions when passing through the guide die 11. Therefore, the guide die 11 has an inner diameter of the alignment hole 11 a of the metal tube 1. It can be set to be the same as or approximate to the outer diameter.
【００２１】この結果、金属管１は、同芯の状態で、し
かも振れのない状態で浮きプラグ２と引抜ダイス９に供
給されることになり、従って、この状態で縮管される金
属管１ａには偏肉が発生せず、高品質の金属管が製造さ
れることになる。As a result, the metal tube 1 is supplied to the floating plug 2 and the drawing die 9 in a concentric state and without any run-out, and therefore, the metal tube 1a contracted in this state. Does not cause uneven thickness, and a high-quality metal tube is manufactured.
【００２２】以上の構成において、ガイドダイス１１の
調芯孔１１ａの内径を金属管１の外径Ｄ1 と同じ２１．
９ｍｍに設定し、金属管１として、肉厚ｔ1 が１．０３
６ｍｍの銅管を使用し、さらに、Ｄ2 を１９．５６ｍ
ｍ、ｄを１７．９ｍｍ、ｔ2 を０．８１ｍｍに設定し、
大径部３の外径Ｄ3 が１９．２ｍｍの浮きプラグ２を使
用して引抜縮管作業を実施したところ、縮管された金属
管１ａの肉厚ｔ2 は、円周方向に均一に分布していた。[0022] In the above configuration, the guide outer diameter D 1 and the same 21 inner diameter of the metal tube 1 of tone Shin'ana 11a of the die 11.
9 mm, and the thickness t 1 of the metal tube 1 is 1.03.
Using the copper pipe of 6 mm, further, 19.56M the D 2
m and d are set to 17.9 mm, t 2 is set to 0.81 mm,
Was subjected to a drawing reduced pipe work outer diameter D 3 of the large-diameter portion 3 uses the floating plug 2 of 19.2 mm, wall thickness t 2 of the swaged metal tube 1a is uniformly circumferentially Was distributed.
【００２３】[0023]
【発明の効果】以上説明したように、本発明による金属
管の引抜縮管方法によれば、金属管の管壁を内側に塑性
変形させた外径縮小部によって浮きプラグの位置決めを
行い、さらに、これに基づいてガイドダイスの調芯孔の
内径を金属管の外径と同一ないしは近似した寸法に設定
するので、ガイドダイスによる調芯作用が高精度なもの
となる。この結果、浮きプラグと引抜ダイスに導入され
る金属管に振れが発生することがなくなり、偏肉のない
高品質の金属管を製造することができる。As described above, according to the method for drawing and shrinking a metal tube according to the present invention, the floating plug is positioned by the outer diameter reducing portion in which the tube wall of the metal tube is plastically deformed inward. On the basis of this, the inner diameter of the alignment hole of the guide die is set to be the same as or approximately the same as the outer diameter of the metal tube, so that the alignment effect of the guide die becomes highly accurate. As a result, the floating plug and the metal pipe introduced into the drawing die do not run out, and a high-quality metal pipe without uneven thickness can be manufactured.
【図１】本発明による金属管の引抜縮管方法の実施の形
態を示す説明図。FIG. 1 is an explanatory view showing an embodiment of a method for drawing and shrinking a metal tube according to the present invention.
【図２】図１の実施の形態において、引抜縮管前の金属
管と浮きプラグの関係を示す説明図であり、（ａ）は横
断面図、（ｂ）は（ａ）のＡ−Ａ矢視図を示す。FIGS. 2A and 2B are explanatory diagrams showing a relationship between a metal tube and a floating plug before the drawing and shrinking tube in the embodiment of FIG. 1, wherein FIG. 2A is a cross-sectional view, and FIG. FIG.
【図３】引抜縮管作業の全体の構成を示す説明図。FIG. 3 is an explanatory diagram showing the entire configuration of the drawing and shrinking pipe work.
【図４】従来の金属管の引抜縮管方法を示す説明図。FIG. 4 is an explanatory view showing a conventional method of drawing and shrinking a metal tube.
【図５】従来の引抜縮管方法における引抜縮管前の金属
管と浮きプラグの関係を示す説明図であり、（ａ）は横
断面図、（ｂ）は（ａ）のＢ−Ｂ断面図を示す。5A and 5B are explanatory views showing the relationship between a metal tube and a floating plug before drawing and contracting in a conventional drawing and contracting method, in which FIG. 5A is a cross-sectional view, and FIG. 5B is a sectional view taken along line BB of FIG. The figure is shown.
１、１ａ 金属管 ２ 浮きプラグ ５ テーパ部 ６、７ 外径縮小部 ８ 圧潰ロール ９ 引抜ダイス １０ テーパ孔 １１ ガイドダイス １１ａ 調芯孔 DESCRIPTION OF SYMBOLS 1, 1a Metal tube 2 Floating plug 5 Taper part 6, 7 Outer diameter reduction part 8 Crush roll 9 Pulling die 10 Tapered hole 11 Guide die 11a Alignment hole
───────────────────────────────────────────────────── フロントページの続き (72)発明者 岡里 和彦 茨城県土浦市木田余町3550番地 日立電線 株式会社システムマテリアル研究所内 Ｆターム(参考） 4E096 EA04 EA05 EA16 FA02 FA21 FA24 GA01 GA15 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhiko Okazato 3550 Kida Yomachi, Tsuchiura-shi, Ibaraki Hitachi Cable, Ltd. System Materials Research Laboratory F-term (reference) 4E096 EA04 EA05 EA16 FA02 FA21 FA24 GA01 GA15
Claims (3)
管の中に入れ、前記金属管を前記浮きプラグの前後の部
分で変形して前記浮きプラグを前記金属管の中で位置決
めし、前記金属管を所定の内径の調芯孔を有するガイド
ダイスを通してテーパ孔を有する引抜ダイスに引き込ん
で前記浮きプラグの前記テーパ部と前記引抜ダイスの前
記テーパ孔の間で前記金属管を所定のサイズに縮管する
金属管の引抜縮管方法において、 前記金属管を変形する工程は、前記金属管の管壁を内側
へ塑性変形させて外径縮小部を形成する工程を含み、 前記金属管を前記ガイドダイスの前記調芯孔に通す工程
は、前記金属管の外径と同一、あるいはそれと近似の内
径の前記調芯孔を有する前記ガイドダイスを準備する工
程の後に行われることを特徴とする金属管の引抜縮管方
法。1. A floating plug having a tapered portion on an outer surface is inserted into a metal tube, and the metal tube is deformed at a portion before and after the floating plug to position the floating plug in the metal tube. The metal tube is drawn into a drawing die having a tapered hole through a guide die having a centering hole having a predetermined inner diameter, and the metal tube is formed to a predetermined size between the tapered portion of the floating plug and the tapered hole of the drawing die. In the method of drawing and shrinking a metal tube to be shrunk, the step of deforming the metal tube includes a step of forming an outer diameter reduction portion by plastically deforming a tube wall of the metal tube inward, and forming the metal tube. The step of passing the guide die through the alignment hole is performed after the step of preparing the guide die having the alignment hole having an inner diameter equal to or close to the outer diameter of the metal pipe, Drawing contraction tube method.
の内径は、前記金属管の外径よりも小さく設定されるこ
とを特徴とする請求項１項記載の金属管の引抜縮管方
法。2. The method according to claim 1, wherein the approximate inner diameter of the alignment hole of the guide die is set smaller than the outer diameter of the metal pipe. .
程は、前記金属管の外周で複数のロールを自転させなが
ら公転させ、かつ、公転の軌跡の半径を増減させる工程
を含むことを特徴とする請求項１項記載の金属管の引抜
縮管方法。3. The step of forming the outer diameter reduction portion of the metal tube includes a step of revolving a plurality of rolls around the outer periphery of the metal tube while rotating, and increasing or decreasing a radius of a revolving locus. The method for drawing and shrinking a metal tube according to claim 1, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01823499A JP3632480B2 (en) | 1999-01-27 | 1999-01-27 | Drawing and shrinking method of metal pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01823499A JP3632480B2 (en) | 1999-01-27 | 1999-01-27 | Drawing and shrinking method of metal pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000210712A true JP2000210712A (en) | 2000-08-02 |
| JP3632480B2 JP3632480B2 (en) | 2005-03-23 |
Family
ID=11965994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01823499A Expired - Fee Related JP3632480B2 (en) | 1999-01-27 | 1999-01-27 | Drawing and shrinking method of metal pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3632480B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391638C (en) * | 2006-05-11 | 2008-06-04 | 沈阳铜兴产业有限公司 | Wire rod stretching pipe edge mould skin removing device and process |
| CN103008382A (en) * | 2012-12-17 | 2013-04-03 | 苏州热工研究院有限公司 | Die for manufacturing reducing pipe |
| WO2014152859A1 (en) * | 2013-03-14 | 2014-09-25 | SAK Construction, LLC | Die reduction machine, reducing die, and method of installation for a pipe liner |
| KR101807959B1 (en) * | 2016-08-10 | 2018-01-23 | 주식회사 우림알텍 | Spiral pipe manufacturing apparatus |
| CN108971247A (en) * | 2018-09-10 | 2018-12-11 | 江阴市洪腾机械有限公司 | A kind of combination cold drawing die reducing thickness of steel pipe difference |
| CN117564126A (en) * | 2023-12-20 | 2024-02-20 | 娄底市鼎成管业有限公司 | Composite forming process of wear-resistant alloy pipe |
-
1999
- 1999-01-27 JP JP01823499A patent/JP3632480B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391638C (en) * | 2006-05-11 | 2008-06-04 | 沈阳铜兴产业有限公司 | Wire rod stretching pipe edge mould skin removing device and process |
| CN103008382A (en) * | 2012-12-17 | 2013-04-03 | 苏州热工研究院有限公司 | Die for manufacturing reducing pipe |
| WO2014152859A1 (en) * | 2013-03-14 | 2014-09-25 | SAK Construction, LLC | Die reduction machine, reducing die, and method of installation for a pipe liner |
| KR101807959B1 (en) * | 2016-08-10 | 2018-01-23 | 주식회사 우림알텍 | Spiral pipe manufacturing apparatus |
| CN108971247A (en) * | 2018-09-10 | 2018-12-11 | 江阴市洪腾机械有限公司 | A kind of combination cold drawing die reducing thickness of steel pipe difference |
| CN108971247B (en) * | 2018-09-10 | 2024-03-12 | 江阴市洪腾机械有限公司 | Combined cold drawing die for reducing wall thickness difference of steel pipe |
| CN117564126A (en) * | 2023-12-20 | 2024-02-20 | 娄底市鼎成管业有限公司 | Composite forming process of wear-resistant alloy pipe |
| CN117564126B (en) * | 2023-12-20 | 2024-05-17 | 娄底市鼎成管业有限公司 | Composite forming process of wear-resistant alloy pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3632480B2 (en) | 2005-03-23 |
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