JPH0696172B2 - Lower roll for forming strip edge of welded steel pipe - Google Patents
Lower roll for forming strip edge of welded steel pipeInfo
- Publication number
- JPH0696172B2 JPH0696172B2 JP1211640A JP21164089A JPH0696172B2 JP H0696172 B2 JPH0696172 B2 JP H0696172B2 JP 1211640 A JP1211640 A JP 1211640A JP 21164089 A JP21164089 A JP 21164089A JP H0696172 B2 JPH0696172 B2 JP H0696172B2
- Authority
- JP
- Japan
- Prior art keywords
- rolls
- roll
- lower roll
- concave curved
- steel pipe
- 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
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
Description
【発明の詳細な説明】 「産業上の利用分野」 本発明は、溶接鋼管の帯板縁部成形用の下ロールに関す
る。TECHNICAL FIELD The present invention relates to a lower roll for forming a strip edge of a welded steel pipe.
「従来の技術」 例えば特開昭58−167025号公報の場合のように、中間部
が小外径でかつ左右両端部が大外径をなす下ロールと
か、又特開昭57−209722号公報の場合のように、上記下
ロールを左右に二分割して左右一対をなす下ロールが知
られている。"Prior Art" For example, as in the case of JP-A-58-167025, a lower roll having a small outer diameter in the middle portion and a large outer diameter at both left and right ends, or JP-A-57-209722. As in the above case, there is known a lower roll forming a pair of left and right by dividing the lower roll into left and right.
「発明が解決しようとする課題」 溶接鋼管の帯板縁部成形用ロールは、上下両ロール間に
帯板を挟み、通過させることで、造管サイズに応じた弯
曲部を帯板縁部に形成させるから、造管サイズが変わる
たびに上記ロールを交換することが必要となる。そのた
めのロール交換の手数は大であり、又造管サイズ数に対
応する数のロールが必要であった。"Problems to be solved by the invention" A roll for forming a strip edge portion of a welded steel pipe has a strip plate sandwiched between the upper and lower rolls and allowed to pass therethrough, thereby forming a curved portion corresponding to the pipe-making size on the strip plate edge portion. Since it is formed, it is necessary to replace the roll every time the pipe making size changes. Therefore, the number of rolls to be replaced is great, and the number of rolls corresponding to the number of pipe-making sizes is required.
本発明は上記上下両ロールのうち、特に下ロールの改良
に係るもので、左右一対をなす分割された一組の下ロー
ルであり乍ら、造管サイズを異にする複数帯板の縁部形
成が可能とし、もって上記下ロール交換の手数を軽減す
ると共に併せてその下ロール数を減少できるよう設けた
ものである。The present invention relates to an improvement of the lower roll among the above-mentioned upper and lower rolls, and is a pair of divided lower rolls forming a pair of left and right rolls, and an edge portion of a plurality of strips having different pipe making sizes. It is formed so as to enable the formation and to reduce the number of times of exchanging the lower roll and also reduce the number of the lower roll.
「課題を解決するための手段」 本発明は、左右一対をなす分割下ロールを、この両分割
下ロール間の内方側が小外径でかつ外方側が大外径をな
す複数の段付きロールとなし、これ等外径を異にする各
段付きロールの段部毎に、造管サイズに応じてそれぞれ
異なる単一の曲率半径の凹状弯曲面を周設すると共に、
各凹状弯曲面に連続する内方側をフラットに形成したこ
とを特徴とする溶接鋼管の帯板縁部成形用下ロールであ
る。"Means for Solving the Problem" The present invention relates to a pair of left and right divided lower rolls, and a plurality of stepped rolls in which the inner side between the divided lower rolls has a small outer diameter and the outer side has a large outer diameter. With each of the stepped rolls having different outer diameters, a concave curved surface having a single radius of curvature is provided around the stepped roll, which is different depending on the pipe making size.
A lower roll for forming a strip plate edge portion of a welded steel pipe, characterized in that the inner side continuous with each concave curved surface is formed flat.
「実施例」 まず第１図が示す第１実施例について説明すると、1,1
は左右に二分割された下ロールで、これ等分割下ロール
はロール軸２外面にそれ等両ロール間の調整が可能に嵌
着されている。その左右の分割下ロール1,1は、その両
ロール間内方側が小外径でかつ外方側が大外径をなす複
数の段付きロールとするもので、図示例では小、中、大
の三段ロールとしている。それ等径を異にする各段部に
はそれぞれ曲率半径R1,R2,R3を異にする凹状弯曲面3,4,
5を周設する。各凹状弯曲面は、図示のように小外径段
部に小径サイズ用凹状弯曲面３を、中外径段部に中径サ
イズ用凹状弯曲面４を、大外径段部に大径サイズ用凹状
弯曲面５をそれぞれ形成するとよく、各凹状弯曲面の各
内方側部分には適当長さのフラット部６…を付設してい
る。各段部と段部との継ぎ目等の部分７にはロール傷発
生防止のためのアールを付けるとよい。"Embodiment" First, the first embodiment shown in FIG.
Is a lower roll that is divided into two parts on the left and right, and these divided lower rolls are fitted on the outer surface of the roll shaft 2 so that adjustment between the two rolls is possible. The left and right divided lower rolls 1, 1 are a plurality of stepped rolls having a small outer diameter on the inner side between the two rolls and a large outer diameter on the outer side. It is a triple roll. Concave curved surfaces 3, 4, and 3 with different radii of curvature R1, R2, and R3, respectively, on the steps with different equal diameters.
Circulate around 5. As shown in the figure, each concave curved surface has a small outer diameter stepped portion for a small diameter size concave curved surface 3, a medium outer diameter stepped portion for a medium diameter concave curved surface 4 and a large outer diameter stepped portion for a large diameter size. The concave curved surfaces 5 may be formed respectively, and flat portions 6 having an appropriate length are attached to the respective inner side portions of the concave curved surfaces. It is advisable to add a radius to prevent the occurrence of roll scratches on the portion 7 such as the seam between each step and the step.
８は帯板で、上記分割下ロール1,1とその上方に設けら
れた上ロール9,9との間でその左右両側部が挟持され、
溶接機側へ進行することで帯板側縁8aが弯曲形成される
ものである。8 is a strip plate, and the left and right side portions thereof are sandwiched between the divided lower rolls 1 and 1 and the upper rolls 9 and 9 provided above them.
By advancing to the welding machine side, the strip plate side edge 8a is curvedly formed.
凹状弯曲面3,4,5の各段のロール径は異なる。この為い
ずれの凹状弯曲面を使用する場合も、各フラット部６が
一定のパスライン高さとなるようにロールの高さ調整を
行う。また下ロールの駆動に関しては、ロールの外周速
度を一定に保つように無段変速機等を用いる。The roll diameter of each step of the concave curved surfaces 3, 4 and 5 is different. Therefore, regardless of which concave curved surface is used, the height of the roll is adjusted so that each flat portion 6 has a constant pass line height. Further, for driving the lower roll, a continuously variable transmission or the like is used so as to keep the outer peripheral speed of the roll constant.
図示例は、中径サイズ用凹状弯曲面4,4により帯板の左
右両側縁を弯曲形成しているが、小径管成形用帯板の両
側縁を弯曲する場合は小径サイズ用凹状弯曲面3,3によ
り、又大径管成形用帯板の両側縁を弯曲する場合は大径
サイズ用凹状弯曲面5,5により成形する。尚左右分割ロ
ール1,1間の間隔は帯板７の幅に応じて所定幅に調整す
る。In the example shown in the figure, the curved left and right edges of the strip are curved by the concave curved surfaces 4 and 4 for the medium diameter size.However, when the curved side edges of the small diameter pipe forming strip are curved, the concave curved surface 3 , 3 and when bending both side edges of the large-diameter pipe forming strip, the large-diameter size concave concave curved surfaces 5, 5 are used for forming. The distance between the left and right divided rolls 1, 1 is adjusted to a predetermined width according to the width of the strip 7.
第２図が示す第２実施例は、分割ロール1,1を大小二段
の段付きロールとした例を示す。その分割ロール1,1間
のロール軸２部分にはスペーサ10を嵌合させている。The second embodiment shown in FIG. 2 shows an example in which the split rolls 1, 1 are stepped rolls of large and small stages. A spacer 10 is fitted to the roll shaft 2 portion between the divided rolls 1 and 1.
「発明の効果」 以上述べた本発明の溶接鋼管の帯板縁部成形用下ロール
は、左右一対をなす分割下ロールを、この両分割下ロー
ル間の内方側が小外径でかつ外方側が大外径をなす複数
の段付きロールとなし、これ等外径を異にする各段付き
ロールの段部毎に、造管サイズに応じてそれぞれ異なる
単一の曲率半径の凹状弯曲面を周設すると共に、各凹状
弯曲面に連続する内方側をフラットに形成したから、各
段付きロールの凹状面に対応した単一曲率半径の上ロー
ルを用いることにより、必要な曲げ長さを単一曲げ半径
で正確に曲げ成形することができ、しかも、造管サイズ
に応じて、使用する段付きロール部を選ぶことにより、
下ロールの組替えの手数を省くことが出来る。"Effects of the Invention" The lower roll for forming the strip edge portion of the welded steel pipe of the present invention described above is a pair of left and right split lower rolls, and the inner side between the split lower rolls has a small outer diameter and is outward. There are multiple stepped rolls with a large outer diameter on the side, and each step of the stepped rolls with different outer diameters has a concave curved surface with a single radius of curvature that is different depending on the pipe size. Since the inner side that is continuous with each concave curved surface is formed flat along with the circumference, by using an upper roll with a single radius of curvature corresponding to the concave surface of each stepped roll, the required bending length can be increased. Accurate bending can be performed with a single bending radius, and by selecting the stepped roll to be used according to the pipe size,
It is possible to save the trouble of reassembling the lower roll.
第１図は本発明下ロールの第１実施例を示す正面図、第
２図はその第２実施例を示す断面図である。 １……分割下ロール、２……ロール軸 3,4,5……凹状弯曲面FIG. 1 is a front view showing a first embodiment of the lower roll of the present invention, and FIG. 2 is a sectional view showing the second embodiment. 1 …… Divided lower roll, 2 …… Roll axis 3,4,5 …… Concave curved surface
フロントページの続き (72)発明者 板谷 進 愛知県半田市川崎町１丁目１番地 川崎製 鉄株式会社知多製造所内 (56)参考文献 実開 平２−11616（ＪＰ，Ｕ) 特公 昭62−25452（ＪＰ，Ｂ２) 特公 平３−12977（ＪＰ，Ｂ２)Front Page Continuation (72) Inventor Susumu Itaya 1-1-1, Kawasaki-cho, Handa-shi, Aichi Kawasaki Steel Co., Ltd. Chita Works (56) References: Kaihei 2-11616 (JP, U) JPB 62- 25452 (JP, B2) Japanese Patent Publication 3-12977 (JP, B2)
Claims (1)
割下ロール間の内方側が小外径でかつ外方側が大外径を
なす複数の段付きロールとなし、これ等外径を異にする
各段付きロールの段部毎に、造管サイズに応じてそれぞ
れ異なる単一の曲率半径の凹状弯曲面を周設すると共
に、各凹状弯曲面に連続する内方側をフラットに形成し
たことを特徴とする溶接鋼管の帯板縁部成形用下ロー
ル。1. A pair of left and right divided lower rolls is provided with a plurality of stepped rolls having a small outer diameter on the inner side and a large outer diameter on the outer side between the divided lower rolls. Each step of the different stepped rolls has a concave curved surface with a single radius of curvature that is different according to the pipe size, and the inner side that is continuous with each concave curved surface is flat. A lower roll for forming a strip plate edge portion of a welded steel pipe, which is characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1211640A JPH0696172B2 (en) | 1989-08-17 | 1989-08-17 | Lower roll for forming strip edge of welded steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1211640A JPH0696172B2 (en) | 1989-08-17 | 1989-08-17 | Lower roll for forming strip edge of welded steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0377724A JPH0377724A (en) | 1991-04-03 |
| JPH0696172B2 true JPH0696172B2 (en) | 1994-11-30 |
Family
ID=16609126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1211640A Expired - Fee Related JPH0696172B2 (en) | 1989-08-17 | 1989-08-17 | Lower roll for forming strip edge of welded steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0696172B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5887651B2 (en) | 2011-12-06 | 2016-03-16 | 新日鐵住金株式会社 | Vehicle abnormality detection method |
| CN109772951B (en) * | 2019-02-02 | 2020-08-21 | 杨元恒 | Metal welded pipe forming device with common roller and production method thereof |
| CN112756413A (en) * | 2021-01-12 | 2021-05-07 | 江苏久日机床科技有限公司 | Four-cylinder gantry type numerical control pipe forming machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5746926A (en) * | 1980-09-05 | 1982-03-17 | Mitsubishi Kakoki Kaisha Ltd | Operation of gas-oil expelling tower |
| JPS62158528A (en) * | 1985-12-28 | 1987-07-14 | Nakata Seisakusho:Kk | Forming method for strip steel end part in pipe mill and its device |
| JPH0211616U (en) * | 1988-07-06 | 1990-01-24 |
-
1989
- 1989-08-17 JP JP1211640A patent/JPH0696172B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0377724A (en) | 1991-04-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |