JPS62252685A - Manufacture of seam welded pipe - Google Patents
Manufacture of seam welded pipeInfo
- Publication number
- JPS62252685A JPS62252685A JP9327786A JP9327786A JPS62252685A JP S62252685 A JPS62252685 A JP S62252685A JP 9327786 A JP9327786 A JP 9327786A JP 9327786 A JP9327786 A JP 9327786A JP S62252685 A JPS62252685 A JP S62252685A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- edge
- forming
- taper
- fin pass
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 238000000034 method Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 230000015556 catabolic process Effects 0.000 abstract description 5
- 230000002950 deficient Effects 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 11
- 239000011324 bead Substances 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 239000003415 peat Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000010959 steel 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］ この発明は電縫管の製造方法に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to a method of manufacturing an electric resistance welded tube.
［従来の技術］
電縫鋼管の製造に使用される素材は、一般に熱延コイル
をスリットしたものが使用される。[Prior Art] The material used to manufacture electric resistance welded steel pipes is generally slit hot-rolled coils.
スリット・コイル１の両エツジ１ａは、スリット時にエ
ツジダレ（第７図）が生じコイル中央部より厚さが薄く
なっていて、又、ブレークダウンロール５ａ、５ｂによ
る成形時に、コイルエツジ１ａが圧縮され（第８図）、
さらに厚さが薄くなっている。第９図に熱延コイル、ス
リットコイル及びフィンノース前の肉厚分布を示す。Both edges 1a of the slit coil 1 are thinner than the central part of the coil due to edge sag (Fig. 7) during slitting, and the coil edges 1a are compressed ( Figure 8),
It is also thinner. Figure 9 shows the wall thickness distribution of the hot rolled coil, slit coil, and front of the fin north.
この状態のコイルエツジ部を、突合せ、溶接した場合、
溶接後のエツジ部の断面は第１０図の様になっている。If the coil edges in this state are butted and welded,
The cross section of the edge after welding is as shown in Figure 10.
すなわち、溶接による圧下で内外面にピート１＊、ｌｂ
がそれぞれ盛り上がるが、ビー）Ｊａ脇凹状部１ｃが薄
肉のまま残ってしまう。In other words, peat 1*, lb is formed on the inner and outer surfaces under pressure by welding.
, respectively, but the concave portion 1c on the side of B) remains thin.
このビード１ａは後工程で切削除去されるが、凹部ＩＣ
を残さぬ様にＢで示す如く切削すると、内ピード切削跡
の寸法不良（ピード切脇肉厚−ビード切削部肉厚が規格
値を超える又は肉厚下限の規格値を超える）となり、逆
に、内ピード切削跡の寸法不良とならない様にＡで示す
如く切削すると、凹状の溝１ｃが残留するという品質上
の問題がある。This bead 1a will be cut and removed in a later process, but the concave IC
If you cut as shown in B to avoid leaving any marks, the inner bead cutting marks will be defective (the thickness of the bead cutting side - the thickness of the bead cutting part exceeds the standard value or the lower limit of the wall thickness exceeds the standard value), and vice versa. If cutting is performed as shown in A to avoid dimensional defects in the inner diameter cutting marks, there is a quality problem in that a concave groove 1c remains.
［発明が解決しようとする問題点］
この念め、フィン・平スでの絞シを増加させることによ
りエツジ部の増肉を狙うが、エツジ端面とフィンとの接
触面の摩擦によりエツジ端面の増肉部は、エツジ近傍に
比べ少なく凹状の溝の防止に効果が少なく、エツジ近傍
の肉厚が規格値外となる問題がある。（第１１図）
［問題点を解決するための手段１作用］電縫管用素材板
の両側端部に成形前にチー・母ロールによシ増肉部を形
成しておいて、電縫管を製造する。[Problems to be Solved by the Invention] In order to keep this in mind, the aim is to increase the thickness of the edge portion by increasing the drawing force at the fins and flats, but due to the friction between the edge end surface and the contact surface between the fin, the edge end surface becomes thinner. The thickened portion is smaller than that near the edge and is less effective in preventing concave grooves, and there is a problem that the wall thickness near the edge exceeds the standard value. (Fig. 11) [Means 1 for solving the problem] Thinner parts are formed on both ends of the material plate for the ERW pipe by the chi and base roll before forming, and the ERW pipe is Manufacture.
こうして成形前にテーパロールにより両側端部に増肉部
を形成すると共に、フィン・やスで増肉を促進させて、
内面ビード除去後の寸法不良及び凹状の溝の発生を防止
する。In this way, before forming, the tapered rolls are used to form thickened parts on both ends, and the fins and shafts are used to promote the thickened parts.
Prevents dimensional defects and concave grooves after inner bead removal.
［実施例］ 本発明方法を実施するためのエッジアプセ。[Example] Edge apse for carrying out the method of the invention.
ト装置１０の１例を第１図〜第３図により説明する。エ
ツジアプセット装置１０は、第１図に示す如く、ブレー
クダウン５、フィンパス６等の成形機の手前に設けられ
ている。エツジアプセット装置１０は、第２図に示す如
く、フレーム１１に１対のエツジアプセットロール１２
，１２を対向させて配設して構成され、これらアプセッ
トロール１２．１２の間隔はモータ駆動されるねじ軸１
３によって調整できるようになっている。そしてフレー
ム１１は、ペッド１４上ＶＣローラベアリング１５を介
して載置され、ラインに直角方向に移動できるようにな
っている。エツジアゲセットロール１２は、第３図に示
す如く上側に拡径するテーノ苧面１２ａを有するテーパ
ロールとなっている。An example of the support device 10 will be explained with reference to FIGS. 1 to 3. As shown in FIG. 1, the edge upset device 10 is provided in front of a molding machine such as a breakdown 5 and a fin pass 6. As shown in FIG. 2, the edge upset device 10 includes a frame 11 and a pair of edge upset rolls 12.
, 12 facing each other, and the interval between these upset rolls 12 and 12 is determined by the motor-driven screw shaft 1
It can be adjusted by 3. The frame 11 is placed on the ped 14 via a VC roller bearing 15, and is movable in a direction perpendicular to the line. As shown in FIG. 3, the edge set roll 12 is a tapered roll having a tapered surface 12a whose diameter increases upward.
而してスリットによるエツジダレのある素材１は、アプ
セットロール１２により、第３図に示す如く、両側から
圧下され、テーパ面１２ｍに接する０部は変形して上側
に増肉部りが形成される。As shown in FIG. 3, the raw material 1 with the edge sagging caused by the slit is rolled down from both sides by the upset roll 12, and the 0 part in contact with the tapered surface 12m is deformed to form a thickened part on the upper side. .
一方端部下側のＦ部は大−きな変形を受けることなく、
はぼそのまま残る。On the other hand, the F portion on the lower side of the end does not undergo large deformation.
It remains intact.
この場合の素材両側の圧下量のアンバランスは、フレー
ム１１をラインに直角方向に移動できるようにしたため
、第４図（ａ）に示す如（１０％以内になっている。フ
レーム１１を固定した場合の比較例を第４図（ｂ）に示
す。この場合はコイルのキャンバ等の蛇行によシ、工、
ジ両側の圧下が不均一になるため圧下量に３０％程度の
アンバランスが生じている。In this case, the unbalance of the reduction amount on both sides of the material is within 10% as shown in Figure 4(a) because the frame 11 is movable in a direction perpendicular to the line. A comparative example of this case is shown in Fig. 4(b).In this case, due to the meandering of the camber of the coil,
Since the rolling reduction on both sides of the pipe is uneven, there is an imbalance of about 30% in the rolling reduction amount.
そして、端部に増肉部りが形成された素材板は、ブレー
クダウン５で形成され、続いてフィンパス６で絞られる
。この場合、従来のようにエツジ端部がストレートのと
きは、第５図（ｂ）に示すように端面がフィン・９スロ
ール６ａに全面的に接触するので、接触面の摩擦によシ
エッジ端面の増肉は少なかった。しかし本発明方法の場
合は、フィンパスに入った状態で、第５図（ａ）に示す
ようにエツジのＦ部のみがフィン・やスロール６ａに接
触しており、端面の摩擦が少なくフィン・ぐス６で絞ら
れる過程で０部の増肉が促進される。フィンパス６出口
でのエツジ端部の肉厚分布を第６図（、）に示す。Then, the material plate with the thickened portion formed at the end portion is formed by a breakdown 5 and then narrowed by a fin pass 6. In this case, when the edge end is straight as in the conventional case, the end face completely contacts the fin/9 throttle 6a as shown in FIG. 5(b), so the friction of the contact surface causes the edge end face to There was little meat gain. However, in the case of the method of the present invention, when entering the fin path, only the F part of the edge is in contact with the fin or throttle 6a, as shown in FIG. In the process of being squeezed in step 6, the thickness increase of 0 parts is promoted. The wall thickness distribution of the edge end at the exit of the fin path 6 is shown in FIG. 6 (,).
第６図軸）に示す従来の場合に比べ、エツジ端部での薄
肉部は全く無くなっている。Compared to the conventional case shown in FIG. 6 (axis), there is no thin wall portion at the edge end.
こうして、内面ビード脇での凹状部Ｊｅ（第１０図）の
ない電縫管を得ることができる。In this way, it is possible to obtain an electric resistance welded tube without a concave portion Je (FIG. 10) beside the inner surface bead.
［発明の効果］
この発明の電縫管の製造方法は、上記のようなもので、
内面ピード除去後の寸法不良及び凹状の溝の発生を防止
することができる。[Effect of the invention] The method for manufacturing an electric resistance welded pipe of the present invention is as described above,
It is possible to prevent dimensional defects and concave grooves from occurring after the inner surface peat is removed.
第１図〜第３図は、本発明方法を実施する念めの装置の
一例を示すもので第１図は配置図、第２図はエツジアプ
セット装置の説明図、第３図はアプセットロールを使用
状態で示す説明図、第４図（ａ）、（ｂ）はフレームを
移動可能にした場合とフレームを固定した場合のエツジ
のＤ側とＦ側の圧下量の関係を示す説明図、第５図（ａ
）、（ｂ）は本発明法と従来法におけるエツジ端面とフ
ィンパスロールとの接触状態の説明図、第６図（ａ）、
（ｂ）は本発明法と従来法におけるエツジ端部の肉厚分
布説明図、第７図はスリット後のエツジ端部の説明図、
第８図はブレークダウンの説明図、第９図は従来法での
各工程におけるエツジ端部の肉厚分布説明図、第１０図
は従来法での突合せ溶接部の断面形状説明図、第１１図
は従来法でフィンノクスでの絞りを変えた場合のエツジ
端部の肉厚分布説明図である。
１・・・素材板、１ａ・・・端部（エツジ部）、１２・
・・エツジアゲセットロール、１２ａ・・・チー ／４
面。
第１図
第２！！！ｉｌ
第３Ｂ
０４ｇり圧下！
第４図
（ａ） （ｂ）第５図
第６１１！ｉｉ
第７図
第８図
第９図Figures 1 to 3 show an example of a device for carrying out the method of the present invention. Figure 1 is a layout diagram, Figure 2 is an explanatory diagram of an edge upset device, and Figure 3 is an illustration of an upset roll. Explanatory diagrams shown in use, Figures 4(a) and 4(b) are explanatory diagrams showing the relationship between the amount of reduction on the D side and F side of the edge when the frame is movable and when the frame is fixed. Figure 5 (a
), (b) are explanatory diagrams of the contact state between the edge end face and the fin pass roll in the present invention method and the conventional method, and FIG. 6 (a),
(b) is an explanatory diagram of the wall thickness distribution of the edge end in the present invention method and the conventional method, FIG. 7 is an explanatory diagram of the edge end after slitting,
Fig. 8 is an explanatory diagram of breakdown, Fig. 9 is an explanatory diagram of the thickness distribution of the edge end in each process in the conventional method, Fig. 10 is an explanatory diagram of the cross-sectional shape of the butt welded part in the conventional method, and Fig. 11 The figure is an explanatory diagram of the wall thickness distribution at the edge end when the aperture of the Finnox is changed in the conventional method. 1... Material board, 1a... End (edge part), 12.
・・Etsujiage Set Roll, 12a・・Chi /4
surface. Figure 1, Figure 2! ! ! il 3rd B 04g press down! Figure 4 (a) (b) Figure 5 611! ii Figure 7 Figure 8 Figure 9
Claims (1)
り増肉部を形成しておいて、電縫管を製造することを特
徴とする電縫管の製造方法。1. A method for manufacturing an electric resistance welded tube, characterized in that the electric resistance welded tube is manufactured by forming thickened portions on both ends of a material plate for the electric resistance welded tube using tapered rolls before forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9327786A JPS62252685A (en) | 1986-04-24 | 1986-04-24 | Manufacture of seam welded pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9327786A JPS62252685A (en) | 1986-04-24 | 1986-04-24 | Manufacture of seam welded pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62252685A true JPS62252685A (en) | 1987-11-04 |
| JPH0438516B2 JPH0438516B2 (en) | 1992-06-24 |
Family
ID=14077939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9327786A Granted JPS62252685A (en) | 1986-04-24 | 1986-04-24 | Manufacture of seam welded pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62252685A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0238123U (en) * | 1988-08-31 | 1990-03-14 | ||
| JPH04157036A (en) * | 1990-10-17 | 1992-05-29 | Mitsubishi Shindoh Co Ltd | Manufacture of tube with grooved inner surface |
| JP2010234405A (en) * | 2009-03-31 | 2010-10-21 | Nisshin Steel Co Ltd | Manufacturing method and crushing equipment for welded pipe |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55128383A (en) * | 1979-03-27 | 1980-10-04 | Sumitomo Metal Ind Ltd | Production of electric welded tube |
| JPS6036348A (en) * | 1983-08-05 | 1985-02-25 | Nippon Kogaku Kk <Nikon> | Glass for eye glass lenses |
-
1986
- 1986-04-24 JP JP9327786A patent/JPS62252685A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55128383A (en) * | 1979-03-27 | 1980-10-04 | Sumitomo Metal Ind Ltd | Production of electric welded tube |
| JPS6036348A (en) * | 1983-08-05 | 1985-02-25 | Nippon Kogaku Kk <Nikon> | Glass for eye glass lenses |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0238123U (en) * | 1988-08-31 | 1990-03-14 | ||
| JPH04157036A (en) * | 1990-10-17 | 1992-05-29 | Mitsubishi Shindoh Co Ltd | Manufacture of tube with grooved inner surface |
| JP2010234405A (en) * | 2009-03-31 | 2010-10-21 | Nisshin Steel Co Ltd | Manufacturing method and crushing equipment for welded pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0438516B2 (en) | 1992-06-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |