JPH0377724A - Lower roll for forming band plate edge part of welded steel pipe - Google Patents
Lower roll for forming band plate edge part of welded steel pipeInfo
- Publication number
- JPH0377724A JPH0377724A JP21164089A JP21164089A JPH0377724A JP H0377724 A JPH0377724 A JP H0377724A JP 21164089 A JP21164089 A JP 21164089A JP 21164089 A JP21164089 A JP 21164089A JP H0377724 A JPH0377724 A JP H0377724A
- Authority
- JP
- Japan
- Prior art keywords
- rolls
- band plate
- roll
- lower roll
- different
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims description 4
- 239000010959 steel Substances 0.000 title claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 2
- 239000002253 acid Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 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、溶接鋼管の帯板縁部成形用の下ロールに関す
る。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a lower roll for forming the edge of a strip of welded steel pipe.
「従来の技術J
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 J'' For example, as in the case of JP-A No. 58-167025, there is a lower roll having a small outer diameter at the middle part and a large outer diameter at both left and right ends, and JP-A No. 57-209722. As in the case of , a lower roll is known in which the lower roll is divided into left and right halves to form a pair of left and right rolls.
「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'' Rolls for forming the edge of a welded steel pipe strip can create a curved portion on the edge of the strip according to the size of the pipe by sandwiching the strip between the upper and lower rolls and passing it through. Because of this, it is necessary to replace the rolls each time the pipe size changes. This requires a large amount of effort to replace the rolls, and the number of rolls required corresponds to the number of pipe sizes.
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 particularly relates to improvement of the lower roll among the above-mentioned upper and lower rolls. This makes it possible to reduce the number of lower rolls, thereby reducing the trouble of exchanging the lower rolls and reducing the number of lower rolls.
riaを解決するための手段」
帯板縁部酸形用下ロールを左右一対をなす分割ロールで
形成すると共に、これ等分割両ロールを、前ロール間内
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
ロールとなし、これ等両ロールの外径を異にする各段部
毎に、造管サイズに応じて異なる曲率半径の凹状弯曲面
を周設した。"Means for solving ria" The lower roll for band plate edge acid forming is formed by a pair of left and right split rolls, and both of these split rolls are separated so that the inner side between the front rolls has a small outer diameter and the outer side has a small outer diameter. A plurality of stepped rolls having a large outer diameter were used, and a concave curved surface with a different radius of curvature was provided around each step of the rolls having different outer diameters depending on the pipe forming size.
「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、I、
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、小
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。“Example” First, the first example shown in FIG. 1 will be explained.
Reference numeral 1 denotes a lower roll divided into left and right halves, and these divided lower rolls are fitted onto the outer surface of a 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 with a small outer diameter on the inner side and a large outer diameter on the outer side between the two rolls, and in the illustrated example, there are small, medium, and large rolls. It is made into a three-tiered roll. Concave curved surfaces 3, 4.5 having different curvature radii R1, R2, R3 are provided around each step portion having different equal diameters. As shown in the figure, each concave curved surface has a concave curved surface 3 for small diameter size on the small outer diameter step, a concave curved surface 4 for medium diameter size on the small outer diameter step, and a concave curved surface 4 for medium diameter size on the large outer diameter step. It is preferable to form concave curved surfaces 5 for each purpose,
A flat portion 6- of an appropriate length is attached to each inner side portion of each concave curved surface. It is preferable to add a radius to the joints 7 between each step to prevent roll damage.
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。Reference numeral 8 denotes a strip plate, whose left and right sides are held between the lower divided roll 1.1 and the upper roll 9.9 provided above it, and as it advances toward the welding machine, the side edge 8a of the strip plate is formed. is formed into a curve.
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へように無段変速機等を用いる。The roll diameter of each stage of the concave curved surface 3.4.5 is different. For this reason, no matter which concave curved surface is used, the height of the roll must be adjusted so that each flat part 6 has a constant pass line height, and when driving the lower roll, the peripheral speed of the roll must be kept constant. Use a continuously variable transmission, etc. to maintain
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11間の間隔は帯板7の幅に応して所定幅に
調整する。In the illustrated example, the left and right edges of the band plate are curved by the concave curved surfaces 4.4 for medium diameter sizes, but when both edges of the band plate for small diameter pipe forming are curved, the concave curved surfaces 3 for small diameter sizes are used. .3
In addition, when both edges of the band plate for forming large diameter tubes are curved, the concave curved surfaces 5.5 for large diameter sizes are formed. Incidentally, the interval between the left and right divided rolls 11 is adjusted to a predetermined width according to the width of the band plate 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lOを嵌合させて
いる。The second embodiment shown in FIG. 2 consists of divided rolls 1. Divided roll 1 shows an example where 1 is a stepped roll of two sizes, large and small.
.. A spacer IO is fitted into the roll shaft 2 portion between the roll shafts 1 and 1.
「発明の効果」
本発明は既述titとするもので、左右一対をなす分割
下ロール1.1を、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なし、それ等
両ロールの外径を異にする各段部毎に、造管サイズに応
して異なる曲率半径の凹状彎曲面を周設したから、同一
の分割下ロールにより複数造管サイズの帯板縁部を弯曲
形成できることとなり、よってロール組替えの手数を省
くことが出来、従って又ロール数も従来に比してはるか
に少数でよいこととなり、そのロール保管スペースも低
減でき、このようにして帯板縁部の成形コストを大幅に
減少することが可能である。"Effects of the Invention" The present invention is as described above, and consists of a pair of left and right divided lower rolls 1.1, which are divided into a plurality of stages having a small outer diameter on the inner side between the two rolls and a large outer diameter on the outer side. A concave curved surface with a different radius of curvature according to the size of the tube is provided around each step where the outer diameter of the two rolls differs, so it is possible to manufacture multiple pieces using the same divided lower roll. The edge of the tube-sized strip can be curved, which saves the trouble of re-arranging the rolls.The number of rolls can also be far smaller than in the past, and the storage space for the rolls can also be reduced. In this way it is possible to significantly reduce the molding costs of the strip edges.
第11!l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。
l・・・分割下ロール
2・・・ロール軸
3.4.5・・・凹状弯曲面11th! 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. l...Divided lower roll 2...Roll axis 3.4.5...Concave curved surface
Claims (1)
で形成すると共に、これ等分割両ロールを、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
きロールとなし、これ等両ロールの外径を異にする各段
部毎に、造管サイズに応じて異なる曲率半径の凹状弯曲
面を周設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。The lower roll for forming the edge of the strip is formed by a pair of left and right split rolls, and these split rolls are separated by a plurality of steps with a small outer diameter on the inner side and a large outer diameter on the outer side between the two rolls. A strip edge of a welded steel pipe characterized by having a concave curved surface having a different radius of curvature depending on the pipe manufacturing size at each step where the outer diameter of both rolls is different. Lower roll for forming.
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 true JPH0377724A (en) | 1991-04-03 |
JPH0696172B2 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) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9511783B2 (en) | 2011-12-06 | 2016-12-06 | Nippon Steel & Sumitomo Metal Corporation | Method and apparatus for detecting abnormality of vehicle |
CN109772951A (en) * | 2019-02-02 | 2019-05-21 | 杨元恒 | Metal welding pipe forming apparatus and its production method with common roller |
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 |
Citations (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
Patent Citations (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 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9511783B2 (en) | 2011-12-06 | 2016-12-06 | Nippon Steel & Sumitomo Metal Corporation | Method and apparatus for detecting abnormality of vehicle |
CN109772951A (en) * | 2019-02-02 | 2019-05-21 | 杨元恒 | Metal welding pipe forming apparatus and its production method with common roller |
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 |
Also Published As
Publication number | Publication date |
---|---|
JPH0696172B2 (en) | 1994-11-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |