JPH0815626B2 - ERW pipe forming equipment - Google Patents
ERW pipe forming equipmentInfo
- Publication number
- JPH0815626B2 JPH0815626B2 JP14622887A JP14622887A JPH0815626B2 JP H0815626 B2 JPH0815626 B2 JP H0815626B2 JP 14622887 A JP14622887 A JP 14622887A JP 14622887 A JP14622887 A JP 14622887A JP H0815626 B2 JPH0815626 B2 JP H0815626B2
- Authority
- JP
- Japan
- Prior art keywords
- roll
- present
- pipe
- material edge
- pipe forming
- 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.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は管厚の均一な厚肉の電縫管を製造する電縫管
成形装置に関する。Description: TECHNICAL FIELD The present invention relates to an electric resistance welded pipe forming apparatus for manufacturing an electric resistance welded pipe having a uniform wall thickness.
成形過程の初期段階であるブレークダウンロールスタ
ンドでは第５図に示すように素材エツジ部31と、下ブレ
ークダウンロール11と強接触で減肉が発生する。ここに
おいて12は上ブレークダウンロールである。そして減肉
が発生することにより、素材エツジ部と下ブレークダウ
ンロールとは未接触となるため素材エツジ部の成形が不
充分となる。また厚肉管の場合は管内外面の周長差が大
きくなるため、溶接直前の素材エツジ部の突合せ形状が
理想的なＩ型とならず、第６図のようなＶ型32となり易
く、このような状態で溶接すると第７図のように管内面
に生ずるビードが異常に大きくなり、ビード切削が困難
になるほか、溶接部の品質も悪くなる。In the breakdown roll stand, which is the initial stage of the forming process, as shown in FIG. 5, the material edge portion 31 and the lower breakdown roll 11 are in strong contact with each other, resulting in thinning. Here, 12 is the upper breakdown roll. When the thinning of the material occurs, the material edge portion and the lower breakdown roll are not in contact with each other, so that the molding of the material edge portion becomes insufficient. Further, in the case of a thick-walled pipe, the difference in circumferential length between the inner and outer surfaces of the pipe becomes large, so the butt shape of the material edge portion immediately before welding does not become an ideal I type, and it is easy to become a V type 32 as shown in FIG. When welding is performed in such a state, the bead generated on the inner surface of the pipe becomes abnormally large as shown in FIG. 7, making bead cutting difficult and the quality of the welded portion deteriorates.
かかる問題を解決するものとして特開昭59−125280が
ある。これはブレークダウンゾーンに続くフインパスロ
ールのフインの外面を膨出させ素材エツジの増肉を計る
ものである。JP-A-59-125280 discloses a solution to this problem. This is to increase the thickness of the material edge by bulging the outer surface of the fin of the fin pass roll following the breakdown zone.
従来の電縫管製造装置で厚肉管を製造する場合ブレー
クダウンロールスタンドで発生する素材エツジの減肉お
よび、管内外面の周長差が大きくなるため素材エツジ部
の突合せ形状がＶ型となり易く、るそのために管内面に
生ずるビードが異常に大きくなるという問題点があつ
た。When manufacturing thick-walled pipes with the conventional ERW pipe manufacturing equipment, the thickness of the material edge generated at the break-down roll stand and the difference in the circumferential length between the inner and outer surfaces of the pipe become large, so the butt shape of the material edge easily becomes V-shaped. As a result, there was a problem that the bead generated on the inner surface of the tube became abnormally large.
本発明は上記のような問題点を解決しようとするもの
で、電縫管を成形するブレークダウンゾーンのサイドロ
ールの１または２スタンド以上にサイドロールの側面形
状をロール底面から途中までをロール底面に鋭角をなす
直線で形成し、該直線の終点からロール上部フランジま
でを円弧で形成したサイドロールを設けたことにある。The present invention is intended to solve the above-mentioned problems. One or more stands of a side roll in a breakdown zone for forming an electric resistance welded pipe has a side surface shape of the side roll more than one stand and a roll bottom surface from the roll bottom to the middle. The side roll is formed by a straight line having an acute angle and an arc extending from the end point of the straight line to the roll upper flange.
本発明は、ブレークダウンロールスタンドで生ずる素
材エツジ部に生じた減肉部分をサイドロールスタンドで
増肉しようとするもので、以下本発明の実施例を図面に
基ずいて説明する。本発明に使用するサイドロール２は
第２図のＡ部に特徴があり、ロール形状は第１図に示す
ようにロールの底面27から途中までを、ロール底面に鋭
角をなす直線25で形成し、該直線の終点からロール上部
フランジ28までを円弧26で形成してある。ロールの円弧
部26は素材エツジを増肉させる部分であり、上流スタン
ドから本実施例の一対のサイドロール間に移動してきた
湾曲した素材のエツジはロールの直線部25に強く接触し
つつ上方に案内されて円弧部26に至り第１図に示すよう
に強圧縮されて増肉される。強圧縮する部位が円弧とな
つているので素材エツジは無理なく増肉される。しか
し、従来のサイドロール２は第８図に示すようにロール
の側面21が一つの円弧のみで形成されているので、エツ
ジを増肉する作用はない。The present invention intends to increase the thickness of the thinned portion generated in the material edge portion caused by the breakdown roll stand by the side roll stand. An embodiment of the present invention will be described below with reference to the drawings. The side roll 2 used in the present invention is characterized by a portion A in FIG. 2, and the roll shape is formed by a straight line 25 forming an acute angle on the roll bottom face from the bottom face 27 to the middle thereof as shown in FIG. The arc 26 extends from the end point of the straight line to the roll upper flange 28. The arc portion 26 of the roll is a portion for increasing the thickness of the material edge, and the edge of the curved material that has moved from the upstream stand between the pair of side rolls of the present embodiment moves upward while strongly contacting the linear portion 25 of the roll. When guided, it reaches the arc portion 26 and is strongly compressed to increase the thickness as shown in FIG. The material edge is reasonably thickened because the part that is strongly compressed is an arc. However, as shown in FIG. 8, the side roll 21 of the conventional side roll 2 does not have the effect of thickening the edge because the side face 21 of the roll is formed by only one circular arc.
本発明のサイドロールを設ける位置は、第３図のロー
ル配置ではB6,B8の位置が好ましい。なを本発明のサイ
ドロールの機能を充分に発揮させるためには、スタンド
の剛性を充分にすること、上下ロールスタンドとサイド
ロールスタンドの間隔を極力短くして素材のスプリング
バツクを防止すること、およびロール間隔調整を容易に
行えるようにすることが重要である。第４図は本発明の
サイドロールを第３図のB8の位置に使用して製造した公
称径70φ、管肉厚11mmの断面形状を示す図であり、管の
形状および肉厚が均一であることを示している。The positions of the side rolls of the present invention are preferably positions B6 and B8 in the roll arrangement of FIG. In order to fully exert the function of the side roll of the present invention, the rigidity of the stand should be sufficient, and the interval between the upper and lower roll stands and the side roll stand should be as short as possible to prevent spring backing of the material. And it is important to be able to easily adjust the roll interval. FIG. 4 is a view showing a cross-sectional shape with a nominal diameter of 70φ and a pipe wall thickness of 11 mm manufactured by using the side roll of the present invention at the position of B8 in FIG. 3, and the pipe shape and wall thickness are uniform. It is shown that.
本発明は上記のように構成してあるからブレークダウ
ンロールスタンドで発生する素材エツジの減肉部を増肉
でき、管内外面の周長差による素材エツジ部の突合せ形
状を理想的なＩ型にすることができるので、均一な肉厚
の厚肉管の製造が可能となる。Since the present invention is configured as described above, it is possible to increase the thickness reduction portion of the material edge generated in the breakdown roll stand, and make the butt shape of the material edge portion due to the difference in the circumferential length of the inner and outer surfaces of the pipe an ideal I type. Therefore, it is possible to manufacture a thick-walled tube having a uniform wall thickness.
第１図は、本発明のサイドロールの部分正面図、第２図
は本発明のサイドロールで素材を増肉成形している状態
図、第３図は本発明のブレークダウンゾーンのロールス
タンドの配列図、第４図は本発明の装置を使用して製造
された電縫厚肉鋼管の断面図、第５図は従来のブレーク
ダウンロールでの素材エツジの減肉を示す状態図、第６
図は従来の素材エツジが減肉のまま成形された場合の突
合せ部を示す図、第７図は、第６図の突合せ部を溶接し
た場合の管内面に生じたビードの状態を示す図、第８図
は従来のサイドロールの形状を示す部分正面図である。 １…上．下ロール、２…サイドロール、３…素材、25…
直線部、26…円弧部、28…フランジ部、32…突合せ部。FIG. 1 is a partial front view of a side roll of the present invention, FIG. 2 is a state diagram in which a material is thickened by the side roll of the present invention, and FIG. 3 is a roll stand in a breakdown zone of the present invention. Sequence diagram, FIG. 4 is a cross-sectional view of an electric resistance welded thick steel pipe manufactured by using the apparatus of the present invention, FIG. 5 is a state diagram showing the thinning of the material edge in the conventional breakdown roll, 6
FIG. 7 is a view showing a butt portion when a conventional material edge is molded with a reduced thickness, and FIG. 7 is a view showing a state of a bead generated on a pipe inner surface when the butt portion of FIG. 6 is welded, FIG. 8 is a partial front view showing the shape of a conventional side roll. 1 ... Above. Lower roll, 2 ... Side roll, 3 ... Material, 25 ...
Straight part, 26 ... Arc part, 28 ... Flange part, 32 ... Butt part.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 長浜 裕 東京都千代田区丸の内１丁目１番２号 日 本鋼管株式会社内 審査官 川端 修 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yu Nagahama Osamu Kawabata Inspector, Nihon Kokan Co., Ltd. 1-2 1-2 Marunouchi, Chiyoda-ku, Tokyo
Claims (1)
サイドロールの１または２スタンド以上に、サイドロー
ルの側面形状をロール底面から途中までをロール底面に
鋭角をなす直線で形成し、該直線の終点からロール上部
フランジまでを円弧で形成したサイドロールを設けたこ
とを特徴とする電縫管成形装置。1. A side roll of a side roll in a breakdown zone for forming an electric resistance welded pipe is formed on one or two or more stands with a straight line forming an acute angle with the roll bottom from the roll bottom to the middle thereof. An electric resistance welded pipe forming apparatus characterized in that a side roll having an arc from the end point to the roll upper flange is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14622887A JPH0815626B2 (en) | 1987-06-13 | 1987-06-13 | ERW pipe forming equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14622887A JPH0815626B2 (en) | 1987-06-13 | 1987-06-13 | ERW pipe forming equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63313614A JPS63313614A (en) | 1988-12-21 |
| JPH0815626B2 true JPH0815626B2 (en) | 1996-02-21 |
Family
ID=15403006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14622887A Expired - Fee Related JPH0815626B2 (en) | 1987-06-13 | 1987-06-13 | ERW pipe forming equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0815626B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4925123B2 (en) * | 2007-08-31 | 2012-04-25 | 日新製鋼株式会社 | Method and apparatus for manufacturing irregular cross-section material |
-
1987
- 1987-06-13 JP JP14622887A patent/JPH0815626B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63313614A (en) | 1988-12-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |