JPS6277121A - Pipe forming device - Google Patents
Pipe forming deviceInfo
- Publication number
- JPS6277121A JPS6277121A JP21753385A JP21753385A JPS6277121A JP S6277121 A JPS6277121 A JP S6277121A JP 21753385 A JP21753385 A JP 21753385A JP 21753385 A JP21753385 A JP 21753385A JP S6277121 A JPS6277121 A JP S6277121A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- strip plate
- face
- width
- strip
- 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
Landscapes
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
【発明の詳細な説明】
し産業上の利用分野]
本発明は厚肉管の製造工程に於ける管成形装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tube forming apparatus used in the manufacturing process of thick-walled tubes.
[従来の技術]
厚肉管の製造は、帯状の平板をフォーミングミルにより
順次円形に形成して帯板両幅端を突合せ、この突合せ部
を溶接して製管するものである。[Prior Art] Thick-walled pipes are manufactured by sequentially forming band-shaped flat plates into circular shapes using a forming mill, abutting both width ends of the band plates, and welding the abutted portions.
一般に平板を曲げ成形する場合、第2図、第3図の如く
下ロール1、上ロール2.2によって帯板3を挟圧し、
先ず幅端部を曲げ加工し、更に順次加工度を増大させた
成形ロール4.5によって円形迄曲げ成形する。曲げ成
形が完了したところで、所要の溶接機により両幅端を溶
接するものである。Generally, when bending a flat plate, the strip plate 3 is compressed by the lower roll 1 and the upper roll 2.2 as shown in FIGS. 2 and 3.
First, the width end portions are bent and then further bent into a circular shape using forming rolls 4.5 whose working degree is increased sequentially. Once the bending is completed, both width ends are welded using a required welding machine.
[発明が解決しようとする問題点]
然し乍ら上記した従来の方法では、両幅端部の曲げ加工
によって幅端下縁にダレを生じてしまう。[Problems to be Solved by the Invention] However, in the above-described conventional method, sagging occurs at the lower edge of the width end due to bending of both width ends.
即ち、第4図に示す如く、下ロール1、上ロール2によ
って帯板3を挟圧すると、幅端部が曲げ成形されると同
時に幅端下縁Aが塑性変形を起してダしてしまう。That is, as shown in FIG. 4, when the strip plate 3 is compressed by the lower roll 1 and the upper roll 2, the width end part is bent and formed, and at the same time, the lower width end part A is plastically deformed and is bent. Put it away.
従って、従来の方法で管成形したものでは、第5図に示
す横に、突合せ部Bの管表面側に凹みができ、溶接した
場合でも溶接金属6が充分に盛上らず形状不良を生じて
しまう。Therefore, in a tube formed by the conventional method, a dent is formed on the tube surface side of the abutment part B, as shown in FIG. I end up.
本発明は上記実情に鑑み、幅端部加工時に幅端下縁に塑
性変形を生じさせない様にしようとするものである。In view of the above circumstances, the present invention attempts to prevent plastic deformation from occurring at the lower edge of the width end during width end processing.
し問題点を解決するための手段〕
本発明は帯板を挟圧して幅端部を曲げ成形する上下ロー
ルの少なくとも上ロールを狭幅とし、且幅端面に押圧ロ
ールを当接せしめ、押圧ロールを介して押圧力を作用せ
しめる様構成したことを特徴とするものである。[Means for Solving the Problems] The present invention provides a method in which at least the upper roll of the upper and lower rolls for bending and forming the width end portion by pinching the band plate is made narrow, and a pressure roll is brought into contact with the width end surface. The device is characterized in that it is configured so that a pressing force is applied through the.
[作 用]
押圧ロールによって帯板幅端に押圧力を作用させること
により、幅端部に曲げ力が作用し、この曲げ力により帯
板の成形に要する上下ロールの挟圧力が大幅に軽減され
る。[Function] By applying a pressing force to the width edge of the strip using the pressure roll, a bending force is applied to the width edge, and this bending force significantly reduces the clamping force between the upper and lower rolls required to form the strip. Ru.
[実 施 例] 以下、図面を参照しつつ本発明の詳細な説明する。[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.
下ロール1は軸受台7を介して回転自在に設けられ、図
示しない所要の駆動装置によって回転せられる様になっ
ている。上ロール2は山型状の圧下フレーム8に回転自
在に支持されている。前記下ロール1及び上ロール2の
外周面は帯板3を挟圧した時に、帯板3の幅端が上方へ
曲げられ帯板断面が弓状となる様に形成され、且上ロー
ル2は成形すべき帯板3より所要量だけ幅狭となってい
る。圧下フレーム8は圧下スクリュー9.9によって下
方に押圧し得ると共にバランスシリンダ10によって上
方へ引上げられている。The lower roll 1 is rotatably provided via a bearing stand 7, and is rotated by a required drive device (not shown). The upper roll 2 is rotatably supported by a chevron-shaped rolling frame 8. The outer peripheral surfaces of the lower roll 1 and the upper roll 2 are formed so that when the strip 3 is compressed, the width end of the strip 3 is bent upward and the strip cross section becomes arched, and the upper roll 2 is It is narrower by the required amount than the strip 3 to be formed. The roll-down frame 8 can be pressed downwards by a roll-down screw 9.9 and is pulled upwards by a balance cylinder 10.
11は圧下スクリュー9を移動させる為の圧下モータ、
12はギアボックス・ナツト等からなる駆動変換ユニッ
トである。11 is a reduction motor for moving the reduction screw 9;
12 is a drive conversion unit consisting of a gearbox, nut, etc.
前記圧下フレーム8の両端部にスクリューロッド13,
13をナツトユニット14を介して中心に向って出入自
在に設け、該ナツトユニット14と圧下フレーム上面に
取付けた駆動モータ15とをユニバーサルジヨイント1
6によって連結する。Screw rods 13 are provided at both ends of the reduction frame 8,
13 is provided so as to be able to move in and out toward the center via a nut unit 14, and the nut unit 14 and a drive motor 15 attached to the upper surface of the rolling frame are connected to the universal joint 1.
Connect by 6.
スクリューロッド13.13の先端に押当てロールユニ
ット17.17を左右対称に設ける。Pressing roll units 17.17 are symmetrically provided at the tip of the screw rod 13.13.
而して、ロールユニット17の構成は下記の通りである
。The configuration of the roll unit 17 is as follows.
スクリューロッド13の先端に台座19を取付け、該台
座19にスライダ20を前記帯板端の接線方向に摺動自
在に設ける。スライダ20に押当てローラ21を前記接
線に対して直交する軸心を中心に回転自在なる様設け、
スライダ20は台座19に取付けた押圧シリンダ22の
ロンドに連結する。A pedestal 19 is attached to the tip of the screw rod 13, and a slider 20 is provided on the pedestal 19 so as to be slidable in the tangential direction of the strip end. A pressing roller 21 is provided on the slider 20 so as to be rotatable about an axis perpendicular to the tangent,
The slider 20 is connected to the rond of a pressing cylinder 22 attached to the pedestal 19.
次に作動を説明する。Next, the operation will be explained.
駆動モータ15を駆動してスクリューロッド13を出入
せしめ、押当てローラ21の圧接面が帯板の幅端の接線
上にある如く台座19を移動させ、更に押圧シリンダ2
2によって押当てローラ21を帯板3の端面に当接させ
る。Drive the drive motor 15 to move the screw rod 13 in and out, move the pedestal 19 so that the pressing surface of the pressing roller 21 is on the tangent to the width end of the strip, and then move the pressing cylinder 2
2, the pressing roller 21 is brought into contact with the end surface of the band plate 3.
圧下モータ11により圧下スクリュー9を介して圧下フ
レーム8を下降させ、下ロール1、上ロール2によって
帯板3を挟圧して幅端部を湾曲させる。上ロール2は帯
板3よりも狭幅であるので、帯板3の端部ははみ出した
状態で上方で曲げられるが、該帯板3の端面には押当て
ローラ21が当接されており、下ロール1、上ロール2
で帯板3を挟圧すると共に駆動モータ15によってスク
リューロッド13を突出させ、更に押圧シリンダ22に
より押圧力を作動せしめて、押 l当てローラ21を帯
板端面に押圧する。The reduction frame 8 is lowered by the reduction motor 11 via the reduction screw 9, and the lower roll 1 and the upper roll 2 pinch the strip plate 3 to curve the width end portion. Since the upper roll 2 is narrower than the strip plate 3, the end of the strip plate 3 is bent upward while sticking out, but the pressing roller 21 is in contact with the end surface of the strip plate 3. , lower roll 1, upper roll 2
At the same time, the screw rod 13 is pushed out by the drive motor 15, and the pressing force is activated by the pressing cylinder 22, so that the pressing roller 21 is pressed against the end surface of the strip.
押当てローラ21の押圧によって、帯板3の端部には曲
げ力が作用し、下ロール1、上ロール2による帯板3の
幅端部に曲げ成形を容易にする。A bending force is applied to the end of the strip 3 by the pressure of the pressing roller 21, which facilitates bending of the width end of the strip 3 by the lower roll 1 and the upper roll 2.
即ち、上記装置では曲げ成形する為に下ロール1、上ロ
ール2間に必要とされる挟圧力が大幅に軽減され、而も
帯板端縁は曲げ成形時に下ロール、上ロールに押圧され
ないので幅端下縁のダレを防止し得る。That is, in the above device, the clamping force required between the lower roll 1 and the upper roll 2 for bending is greatly reduced, and the edge of the strip is not pressed by the lower roll or upper roll during bending. Sagging of the lower edge of the width end can be prevented.
尚、上記実施例では上ロールのみ狭幅としたが、下ロー
ルも狭幅としたり上下ロールを同幅としてもよいことは
勿論である。In the above embodiment, only the upper roll has a narrow width, but it goes without saying that the lower roll may also have a narrow width, or the upper and lower rolls may have the same width.
[発明の効果]
以上述べた如く本発明によれば、帯板端面に押圧力を与
え下ロール、上ロール間の挟圧力を低減したので幅端下
縁のダレを防止することができ形状不良を改善し得て、
肉厚管の製品品質を向上させることができる。[Effects of the Invention] As described above, according to the present invention, pressing force is applied to the end face of the strip and the squeezing force between the lower roll and the upper roll is reduced, thereby preventing sagging of the lower edge of the width end and preventing shape defects. can be improved,
Product quality of thick-walled pipes can be improved.
第1図は本発明に係る管成形装置の正面図、第2図は従
来例の説明図、第3図は従来例の説明図、第4図は従来
例に於ける曲げ成形状態を示す説明図、@5図は従来例
によって管成形した場合の不具合を示す説明図である。
1は下ロール、2は上ロール、3は帯板、21は押当て
ロールを示す。
特 許 出 願 人
石川島播唐重工業株式会社
第2図
第4図
第3図
第5図FIG. 1 is a front view of a tube forming apparatus according to the present invention, FIG. 2 is an explanatory diagram of a conventional example, FIG. 3 is an explanatory diagram of a conventional example, and FIG. 4 is an explanatory diagram showing a bending state in the conventional example. Figure @5 is an explanatory diagram showing a problem when forming a tube according to a conventional example. 1 is a lower roll, 2 is an upper roll, 3 is a strip plate, and 21 is a pressing roll. Patent application Hitoshi Kawajima Bankara Heavy Industries Co., Ltd. Figure 2 Figure 4 Figure 3 Figure 5
Claims (1)
端面に押圧ロールを当接せしめ、押圧ロールを介して押
圧力を作用せしめる様構成したことを特徴とする管成形
装置。1) A tube forming apparatus characterized in that a pressure roll is brought into contact with the width end surfaces of the upper and lower rolls that pinch the band plate to bend and form the width end portion, and a pressure force is applied via the pressure roll.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21753385A JPS6277121A (en) | 1985-09-30 | 1985-09-30 | Pipe forming device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21753385A JPS6277121A (en) | 1985-09-30 | 1985-09-30 | Pipe forming device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6277121A true JPS6277121A (en) | 1987-04-09 |
Family
ID=16705738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21753385A Pending JPS6277121A (en) | 1985-09-30 | 1985-09-30 | Pipe forming device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6277121A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62230429A (en) * | 1985-12-30 | 1987-10-09 | Nakata Seisakusho:Kk | Strip material end part bending method in manufacturing thick pipe and its device |
JPS63299864A (en) * | 1987-05-29 | 1988-12-07 | Nkk Corp | Method and device for manufacturing electric welded steel tube |
JP2009056487A (en) * | 2007-08-31 | 2009-03-19 | Nisshin Steel Co Ltd | Method and apparatus for manufacturing material having profile cross section |
CN113103015A (en) * | 2021-05-20 | 2021-07-13 | 燕山大学 | ERW pipe joint surface rolling device and welding heating optimization method |
-
1985
- 1985-09-30 JP JP21753385A patent/JPS6277121A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62230429A (en) * | 1985-12-30 | 1987-10-09 | Nakata Seisakusho:Kk | Strip material end part bending method in manufacturing thick pipe and its device |
JPS63299864A (en) * | 1987-05-29 | 1988-12-07 | Nkk Corp | Method and device for manufacturing electric welded steel tube |
JP2009056487A (en) * | 2007-08-31 | 2009-03-19 | Nisshin Steel Co Ltd | Method and apparatus for manufacturing material having profile cross section |
CN113103015A (en) * | 2021-05-20 | 2021-07-13 | 燕山大学 | ERW pipe joint surface rolling device and welding heating optimization method |
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