JPS63295021A - Forming method for thin pipe in welding pipe - Google Patents
Forming method for thin pipe in welding pipeInfo
- Publication number
- JPS63295021A JPS63295021A JP13283787A JP13283787A JPS63295021A JP S63295021 A JPS63295021 A JP S63295021A JP 13283787 A JP13283787 A JP 13283787A JP 13283787 A JP13283787 A JP 13283787A JP S63295021 A JPS63295021 A JP S63295021A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- reduction
- fin pass
- edge
- passing
- 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
- 238000000034 method Methods 0.000 title claims description 16
- 238000003466 welding Methods 0.000 title abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 abstract description 13
- 239000010959 steel Substances 0.000 abstract description 13
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract 4
- 239000000463 material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電縫管、鍛接管あるいはその他の溶接方法にて
所定の幅の帯鋼その他の金属帯を連続的にロール成形、
溶接する溶接管の製造ラインにおける帯鋼のエツジ発生
する座屈を防止するための薄肉管成形法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention continuously roll-forms a steel strip or other metal strip of a predetermined width using an electric resistance welded pipe, forge welded pipe, or other welding method.
The present invention relates to a thin-walled tube forming method for preventing edge buckling of a steel strip in a production line for welded tubes.
一般に電縫管、鍛接管の製造する方法においては所定の
幅の帯鋼等の金属帯が複数のブレークタウンロール、サ
イドロール、フィンバスロール等からなる成形ロール群
に連続的に供給されて、管状に成形され、然かる後にス
クイズロールで高周波溶接しながら圧接する、ないしは
鍛接ロールで鍛接することによって製造される。Generally, in the manufacturing method of electric resistance welded pipes and forge welded pipes, a metal strip such as a steel strip of a predetermined width is continuously supplied to a forming roll group consisting of a plurality of breaktown rolls, side rolls, fin bath rolls, etc. It is manufactured by forming it into a tubular shape and then pressure welding it with a squeeze roll while high-frequency welding, or by forge welding it with a forge welding roll.
かかる方法は連続で製造できるため、高能率でしかも低
コストであることが大きな利点である。このためにこれ
等の方法にて配管、機械構造用管、ボイラー用管、油井
管等各種の品種が製造されている。This method has the great advantage of being highly efficient and low cost since it can be produced continuously. For this reason, various types of pipes, machine structural pipes, boiler pipes, oil country tubular goods, etc. are manufactured using these methods.
然かるにｔ／Ｄ（ｔ：肉厚、Ｄ；外径）４チ程度以下の
薄肉管においては所定の幅の帯鋼等のが波打ち状になる
。このため溶接時においてエツジの均一な成形、溶接が
できない。このエツジ座屈の発生原因はロール成形にお
ける板幅方向の中心部とエツジ部の間に伸び差が生じる
ためである。これを防止するために、「塑性と加工ＶＯ
１，１１，Ａ１１２Ｊ に水内等が記しているように、
一般にはパスラインをダウンヒルにとったり、スタンド
数を増加させたりして、円周方向の歪み差を減少させて
いる。しかしこれらの対策では十分ではなく、極薄肉管
は製造困難となっていた。However, in a thin-walled pipe of t/D (t: wall thickness, D: outer diameter) of about 4 inches or less, the steel strip or the like of a predetermined width becomes wavy. For this reason, uniform edge formation and welding cannot be achieved during welding. The cause of this edge buckling is that there is a difference in elongation between the center portion and the edge portion in the width direction of the sheet during roll forming. In order to prevent this, "Plasticity and processing VO
As Mizuuchi et al. wrote in 1, 11, A112J,
Generally, the difference in distortion in the circumferential direction is reduced by setting the pass line downhill or increasing the number of stands. However, these measures were not sufficient, making it difficult to manufacture ultra-thin walled tubes.
所定の板幅の帯鋼等の金属帯が成形ロール群に連続的に
供給されて管状に成形される電縫管、鍛接管等の成形工
程においては、薄肉材でエツジ座屈が発生しやすく製造
困難となっている。In the process of forming electric resistance welded pipes, forge welded pipes, etc., in which metal strips such as steel strips of a predetermined width are continuously fed to a group of forming rolls and formed into tubular shapes, edge buckling is likely to occur with thin-walled materials. It is difficult to manufacture.
本発明はこのようなロール成形時のエツジ座屈を防止し
、薄肉管を安定的に製造可能とする方法の提供を目的に
するものである。The object of the present invention is to provide a method that prevents such edge buckling during roll forming and enables stable production of thin-walled tubes.
本発明は所定の幅の金属帯を連続的にロール成形、溶接
する溶接管の製造ラインにおいて、金属帯のエツジに発
生する座屈を防止するためにスクイズロール（加熱され
たエツジを圧接し溶接するロール）前に配置されている
複数のフィンバスロール（エツジ間にフィンを挿入し全
体を拘束し々がら成形するロール）で、成形された金属
帯の周方向に局長リダクションを０．５チ以上かけなが
ら成形する溶接管における薄肉管成形法である。The present invention uses squeeze rolls (heated edges are pressed and welded) in order to prevent buckling that occurs at the edges of the metal strip in a welded pipe production line where metal strips of a predetermined width are continuously roll-formed and welded. A plurality of fin bath rolls (rolls that insert fins between edges and form while restraining the entire metal strip) placed in front of the formed metal strip are used to apply a 0.5 inch reduction in the circumferential direction of the formed metal strip. This is a thin-walled pipe forming method for welded pipes, which is formed by applying the above steps.
以下に第１図〜第２図に示す例に基づき本発明の詳細な
説明する。第１図は電縫管製造工程の一例であるが所定
の幅の帯鋼Ａは成形スタンドに挿入され、エツジペンド
ロール１、ブレークダウンロール２、サイドロール３、
フィンバスロール４，５を通過することによυはぼ管状
となり、ワークコイル６及びスクイズロール７を通過す
ることによプ高周波溶接される。しかしこの方法だと薄
肉材の場合、成形工程において第２図にしめずようなエ
ツジ座屈を生じやすい。そこで本発明は各フィンバスロ
ールで帯鋼Ａの周方向にリダクションＲをかけ、塑性歪
を加えることによシ、エツジ座屈を解消させる。The present invention will be described in detail below based on the examples shown in FIGS. 1 and 2. Fig. 1 shows an example of the process of manufacturing an electric resistance welded pipe. A steel strip A of a predetermined width is inserted into a forming stand, an edge pen roll 1, a breakdown roll 2, a side roll 3,
By passing through the fin bath rolls 4 and 5, the υ becomes tubular, and by passing through the work coil 6 and squeeze roll 7, it is high-frequency welded. However, if this method is used for thin-walled materials, edge buckling as shown in FIG. 2 is likely to occur during the forming process. Therefore, in the present invention, edge buckling is eliminated by applying a reduction R in the circumferential direction of the steel strip A with each fin bath roll and applying plastic strain.
この場合リダクタ１７Ｒは以下のように定義する。In this case, the reductor 17R is defined as follows.
リダクションＲ（チ）
このリダクシヨンＲを０．５チ以上とする。リダクショ
ンはエツジ座屈の程度に応じてかえるものとし、エツジ
座屈が大きければリダクションも大きくする。フィンバ
スロールが複数ある場合は少なくとも１個のフィンバス
ロールのりダクシ璽ンＲを０．５１以上とし、七の他の
フィンバスロールはエツジ座屈の程度に応じてリダクシ
ョンをかける。Reduction R (ch) This reduction R is set to 0.5 chi or more. The reduction shall be changed depending on the degree of edge buckling, and the greater the edge buckling, the greater the reduction. If there are a plurality of fin bath rolls, at least one fin bath roll should have a thickness R of 0.51 or more, and the other fin bath rolls should be subjected to reduction according to the degree of edge buckling.
この方法によってフィンバスロール前ではエツジ座屈が
発生していてもフィンバスロールｔ−通過することによ
シはぼ解消し、溶接が可能となる。With this method, even if edge buckling occurs in front of the fin bath roll, the buckling is largely resolved by passing through the fin bath roll t, making it possible to weld.
この方法は鋼のロール成形のみならずアルミ、銅等のロ
ール成形にも利用できることは明らかである。It is clear that this method can be used not only for roll forming of steel, but also for roll forming of aluminum, copper, etc.
鋼種ＳＧＰ、サイズ≠８９．ＩＸｔ３．４ｇＢの鋼管を
製造する場合の溶接点及びビード切削点の本発明による
場合と、よらない場合を比較したものを第１表に示す。Steel type SGP, size≠89. Table 1 shows a comparison between welding points and bead cutting points according to the present invention and those not according to the present invention when manufacturing a steel pipe with IXt of 3.4 gB.
本発明によらなければかなシのエツジ座屈が溶接前に発
生しているのに対し、本発明による場合はほとんど発生
していない。In contrast to the case where edge buckling occurs before welding without the method according to the present invention, almost no edge buckling occurs with the method according to the present invention.
ここでエツジ部の伸び歪Ｃは式（１）のように表わすこ
とができ、エツジ座屈の一つの指標となる。すなわちエ
ツジ部の伸び歪が大きければエツジ座屈も大きいと考え
てよい。（第２図参照）尚、ここではフィンパスが２０
−ルある場合の例を示した。Here, the elongation strain C of the edge portion can be expressed as shown in equation (1), and is an index of edge buckling. In other words, it can be considered that the greater the elongation strain at the edge, the greater the edge buckling. (See Figure 2) In this case, the fin path is 20.
- An example is shown where there is a file.
エツジ部の伸び歪１＝（Ｌ−１）／Ｉ ・・・・・・
（１）ここでＬ； エツジ座屈発生部のエツジに沿った
長さ一■ ；エツジ座屈発生部の直線距離（簡）第
１ 表
〔発明の効釆〕
以上詳述したように本発明による場合は溶接前の薄肉材
で発生するエツジ座屈を防止することができ、安定した
溶接が可能となる。言い変えれば薄肉管の製造可能範囲
が大幅に拡げることができる。Elongation strain at the edge 1=(L-1)/I...
(1) Here, L; Length along the edge of the edge buckling point - ■ ; Straight line distance (simplified) of the edge buckling point
Table 1 [Effects of the Invention] As detailed above, according to the present invention, edge buckling that occurs in thin materials before welding can be prevented, and stable welding can be performed. In other words, the range of thin-walled tubes that can be manufactured can be greatly expanded.
第１図は本発明におけるフィンバスロールを配隋した電
縫管の製造工程の一例を示す図、第２図はエツジ座屈の
一例を示す図である０１・・・エツジペンドロール
２・・・ブレークダウンロール
３・・・サイトロール ４，５・・・フインノくスロ
ール６・・・ワークコイル ７・・・スクイズロール
Ａ・・・鋼帯。
第１図
Ａ：銅帯
第２図
手続補正書
昭和ろ１年ｂ 月ユ友日
昭和ｂ〉年特許願第）共わ７号
事件との関係 出 願 人
４、代理人
住 所 東京都千代田区九の内２丁目６番２号ブしの
内へ重洲ビル３３０朋１ｍ嘗の究明のπ摺な：！ｌ明の
瀉
補 正 書
本願明細書中下記事項・を補正論たします。
記
１、第３頁３行目に
「ｖｏ １．１１． Ｊとあるを
「ｖｏＡ、 １１． Ｊと訂正する。Fig. 1 is a diagram showing an example of the manufacturing process of an electric resistance welded pipe in which fin bath rolls are arranged according to the present invention, and Fig. 2 is a diagram showing an example of edge buckling. - Breakdown roll 3...Sight roll 4,5...Finnoku roll 6...Work coil 7...Squeeze roll A...Steel strip. Figure 1 A: Copper Band Figure 2 Procedural Amendments (1999, 1999, Patent Application No. 7) Applicant 4, Agent Address: Chiyoda, Tokyo Shigesu Building 330, 1m long, 2-6-2, Kuunouchi 2-6-2, Ku-ku, 1m long investigation's π print:! I amend the following matters in the specification of this application. Note 1, page 3, line 3, ``vo 1.11. J'' is corrected to ``voA, 11. J.''
Claims (1)
管の製造ラインにおいて、金属帯のエッジに発生する座
屈を防止するためにスクイズロール前に配置されている
複数のフィンバスロールで、成形された金属帯の周方向
に周長リダクションを０．５％以上かけながら成形する
ことを特徴とする溶接管における薄肉管成形法。In a welded pipe manufacturing line where metal strips of a predetermined width are continuously roll-formed and welded, multiple fin bath rolls are placed in front of the squeeze rolls to prevent buckling that occurs at the edges of the metal strips. A thin-walled pipe forming method for a welded pipe, characterized by forming the formed metal strip while applying a circumferential length reduction of 0.5% or more in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13283787A JPS63295021A (en) | 1987-05-28 | 1987-05-28 | Forming method for thin pipe in welding pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13283787A JPS63295021A (en) | 1987-05-28 | 1987-05-28 | Forming method for thin pipe in welding pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63295021A true JPS63295021A (en) | 1988-12-01 |
Family
ID=15090680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13283787A Pending JPS63295021A (en) | 1987-05-28 | 1987-05-28 | Forming method for thin pipe in welding pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63295021A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997032676A1 (en) * | 1996-03-08 | 1997-09-12 | Ryosuke Kuramoto | Method of manufacturing thin-walled pipe or product having similar cross section |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5935688A (en) * | 1982-07-13 | 1984-02-27 | コンパニイ・ジエネラル・デレクトリシテ | Manufacture of arylacetic acid and arylpropionic acid |
-
1987
- 1987-05-28 JP JP13283787A patent/JPS63295021A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5935688A (en) * | 1982-07-13 | 1984-02-27 | コンパニイ・ジエネラル・デレクトリシテ | Manufacture of arylacetic acid and arylpropionic acid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997032676A1 (en) * | 1996-03-08 | 1997-09-12 | Ryosuke Kuramoto | Method of manufacturing thin-walled pipe or product having similar cross section |
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