JPH05177257A - Device for straightening complete roundness of tube end of steel tube pile and the like - Google Patents
Device for straightening complete roundness of tube end of steel tube pile and the likeInfo
- Publication number
- JPH05177257A JPH05177257A JP34567691A JP34567691A JPH05177257A JP H05177257 A JPH05177257 A JP H05177257A JP 34567691 A JP34567691 A JP 34567691A JP 34567691 A JP34567691 A JP 34567691A JP H05177257 A JPH05177257 A JP H05177257A
- Authority
- JP
- Japan
- Prior art keywords
- pipe end
- cylinder
- pipe
- pressing surface
- tube end
- 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
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鋼管矢板等の管端部真
円矯正方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for straightening a pipe end portion such as a steel pipe sheet pile.
【０００２】[0002]
【従来の技術】従来、埋め立て現場等においては防護壁
を形成するために矢板が用いられている。特に深度が深
い場合には、強度的な理由から鋼管矢板が用いられてい
る。図３に示すように、鋼管矢板１は円柱状の鋼管２の
側部に継手部３を設けて形成されており、継手部３には
管軸心方向に沿ってスリット４が形成されている。そし
て、一方の鋼管矢板１の継手部３と他方の鋼管矢板１の
継手部３を双方のスリット４に相互に挿通して係合する
ことにより、双方の鋼管矢板１を接続している。2. Description of the Related Art Conventionally, sheet piles have been used to form a protective wall in a landfill site or the like. Steel pipe sheet piles are used for strength reasons especially when the depth is deep. As shown in FIG. 3, the steel pipe sheet pile 1 is formed by providing a joint portion 3 on a side portion of a cylindrical steel pipe 2, and a slit 4 is formed in the joint portion 3 along the pipe axial direction. . Then, the joint portions 3 of one of the steel pipe sheet piles 1 and the joint portion 3 of the other steel pipe sheet pile 1 are inserted into and engaged with both slits 4 to connect the two steel pipe sheet piles 1.
【０００３】そして、長尺な鋼管矢板を形成するときに
は、単管の鋼管矢板１を順次に溶接接続している。しか
し、鋼管矢板１は鋼管２に継手部３を溶接固定するとき
の熱応力により、管端部が継手部３に対応する方向を長
軸として楕円形に変形するので、双方の鋼管矢板の管端
部どうしを合わせることが困難となる。このため、従
来、油圧シリンダ装置を用いて鋼管２の管端部２ａを矯
正する方法が採られている。これを図２で説明する。When forming a long steel pipe sheet pile, the single pipe steel pipe sheet piles 1 are sequentially welded and connected. However, the steel pipe sheet pile 1 is deformed into an elliptical shape with the direction corresponding to the joint portion 3 as the major axis due to thermal stress when the joint portion 3 is fixed to the steel pipe 2 by welding. It will be difficult to fit the ends together. Therefore, conventionally, a method of correcting the pipe end portion 2a of the steel pipe 2 using a hydraulic cylinder device has been adopted. This will be described with reference to FIG.
【０００４】図２において、５は鋼管２の管端部２ａに
挿入された油圧シリンダ装置であり、上記鋼管２の管径
方向へ伸縮可能なシリンダ部６と、このシリンダ部６に
送油する油圧ユニット７と、シリンダ部６の伸張変位量
を測定するポテンショメータ８と、管端部２ａに対する
荷重値を測定するロードセル９とを備えており、上記シ
リンダ部６の先端には、上記管端部２ａの内面を押圧す
る横断面半円形の当て金１０が取り付けられている。１
１は油圧ユニット７に対するコントローラである。In FIG. 2, reference numeral 5 denotes a hydraulic cylinder device inserted in the pipe end portion 2a of the steel pipe 2, which is a cylinder portion 6 which can expand and contract in the radial direction of the steel pipe 2, and which feeds oil to the cylinder portion 6. A hydraulic unit 7, a potentiometer 8 for measuring the amount of extensional displacement of the cylinder portion 6, and a load cell 9 for measuring the load value on the pipe end portion 2a are provided, and the pipe end portion is provided at the tip of the cylinder portion 6. A pad 10 having a semicircular cross section for pressing the inner surface of 2a is attached. 1
Reference numeral 1 is a controller for the hydraulic unit 7.
【０００５】このような構成により、鋼管矢板１の鋼管
２の管端部２ａを真円に矯正するには、コントローラ１
１からの制御出力を受けて油圧ユニット７より油圧シリ
ンダ装置５のシリンダ部６に送油して該シリンダ部６を
伸張変位させれば、当て金１０により上記鋼管２の管端
部２ａが拡径変形される。この管端部２ａの変径量は、
ポテンショメータ８によりシリンダ部６の変位量を測定
する一方、ロードセル９により荷重値を検出して上記シ
リンダ部６の伸張を調整することにより、制御される。With such a configuration, in order to straighten the pipe end portion 2a of the steel pipe 2 of the steel pipe sheet pile 1, the controller 1
When the control unit 1 receives a control output from the hydraulic unit 7 and sends oil to the cylinder portion 6 of the hydraulic cylinder device 5 to extend and displace the cylinder portion 6, the pad 10 expands the pipe end portion 2a of the steel pipe 2. The diameter is changed. The amount of diameter change of this pipe end 2a is
The potentiometer 8 measures the amount of displacement of the cylinder portion 6, while the load cell 9 detects the load value and adjusts the extension of the cylinder portion 6 for control.
【０００６】[0006]
【発明が解決しようとする課題】しかし、上記した従来
の方法によれば、当て金１０として、その押圧面１０ａ
の曲率が管端部の曲率よりもはるかに小さいものを使用
しているので、鋼管２の管端部２ａを拡径させた際に管
端部２ａが局部的に変形する傾向にある。このため、上
記当て金１０として、その押圧面１０ａの曲率が管端部
２ａの曲率に近い比較的大形のものを使用することが試
みられているが、この場合、シリンダ部６の変位量に対
して当て金押圧面１０ａと管端部２ａとの接触面積の増
加量が著しく大きくなる。このため、ロードセル９によ
って計測される荷重値が急激に増加して制御が難しくな
るという難点がある。However, according to the above-mentioned conventional method, the pressing surface 10a is used as the pad 10.
Since the curvature of is much smaller than the curvature of the pipe end, the pipe end 2a tends to be locally deformed when the diameter of the pipe end 2a of the steel pipe 2 is expanded. For this reason, it has been attempted to use, as the above-mentioned pad 10, a relatively large pressing surface 10a whose curvature is close to that of the tube end portion 2a. On the other hand, the amount of increase in the contact area between the contact metal pressing surface 10a and the tube end portion 2a becomes significantly large. Therefore, there is a drawback that the load value measured by the load cell 9 suddenly increases and control becomes difficult.
【０００７】本発明は上記のような課題を解消するため
になされたもので、管端部の局部変形を防止できるとと
もに、真円矯正のための制御性を容易にして精確な真円
矯正を実行することができる鋼管矢板等の管端部真円矯
正方法を提供することを目的としている。The present invention has been made in order to solve the above problems, and it is possible to prevent local deformation of the pipe end portion, facilitate controllability for roundness correction, and perform accurate roundness correction. It is an object of the present invention to provide a pipe end roundness correcting method for a steel pipe sheet pile or the like that can be executed.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に本発明は、管体の管端部内に挿入された油圧シリンダ
装置のシリンダ部の先端に、上記管端部の曲率に近い曲
率の押圧面をもった当て金を取り付け、上記シリンダ部
を伸張変位させて上記当て金を介して管端部を拡径変形
させる際に、上記シリンダ部の変位量に対する当て金押
圧面と管端部との接触面積の変化率を求め、この接触面
積の変化率に応じて荷重値が変化するように上記シリン
ダ装置の油圧を制御しながら管端部の真円矯正を行なう
ものである。In order to achieve the above object, the present invention is directed to a tip end of a cylinder portion of a hydraulic cylinder device inserted in a pipe end portion of a pipe body having a curvature close to that of the pipe end portion. When a pad having a pressing surface is attached and the cylinder portion is expanded and displaced to expand and deform the pipe end portion through the pad, the pad pressing surface and the pipe end portion with respect to the displacement amount of the cylinder portion The rate of change of the contact area with is calculated and the roundness of the pipe end is corrected while controlling the hydraulic pressure of the cylinder device so that the load value changes according to the rate of change of the contact area.
【０００９】[0009]
【作用】本発明によれば、当て金として、その押圧面の
曲率が管端部の曲率に近い大形のものを使用すること
で、管端部の局部的な変形が防止されるとともに、この
大形の当て金押圧面と管端部との接触面積がシリンダ部
の伸張変位に対して急激に増大しても、該接触面積の変
化率に応じて荷重値を変化させるので、制御性が向上す
るとともに、精確な真円矯正が行なえる。According to the present invention, by using a large pad having a pressing surface whose curvature is close to that of the pipe end, local deformation of the pipe end can be prevented and Even if the contact area between the large pressure metal pressing surface and the pipe end increases rapidly with respect to the extensional displacement of the cylinder, the load value is changed according to the rate of change of the contact area. The accuracy of the circle can be improved as well.
【００１０】[0010]
【実施例】以下、本発明の一実施例を図面にもとづいて
説明する。図１は本発明の一実施例による鋼管矢板等の
管端部真円矯正方法を適用して矯正を行なうための構成
図であり、図２で示す従来例と同一部所には、同一符号
を付してその説明を省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram for performing straightening by applying a pipe end roundness correcting method for a steel pipe sheet pile according to an embodiment of the present invention, and the same parts as those of the conventional example shown in FIG. Is attached and its description is omitted.
【００１１】図１において、２０はシリンダ装置５にお
けるシリンダ６の先端に取り付けられた当て金であり、
この当て金２０は、鋼管２の管端部２ａの曲率に近い曲
率の押圧面２０ａを有する比較的大形のものが使用され
ている。油圧ユニット７を制御するコントローラ２１
は、演算部２２とこの演算部２１の演算に基づいて制御
出力を送出する制御部２３とを備え、上記演算部２１で
は、シリンダ部６の伸張変位量に対する当て金押圧面２
０ａと管端部２ａとの接触面積の変化率を演算し、この
接触面積値の変化率に応じて荷重値が変化するような油
圧制御を行なうようになっている。In FIG. 1, reference numeral 20 denotes a metal fitting attached to the tip of the cylinder 6 in the cylinder device 5,
As the pad 20, a relatively large one having a pressing surface 20a having a curvature close to the curvature of the pipe end 2a of the steel pipe 2 is used. Controller 21 for controlling hydraulic unit 7
Is provided with a calculation unit 22 and a control unit 23 that sends a control output based on the calculation of the calculation unit 21. In the calculation unit 21, the pressing metal pressing surface 2 for the extension displacement amount of the cylinder unit 6 is provided.
0a and the pipe end portion 2a are contacted with each other, and the hydraulic pressure control is performed so that the load value changes according to the contact area value change rate.
【００１２】上記構成により、鋼管２の管端部２ａの真
円矯正を行なう場合、上記管端部２ａに挿入したシリン
ダ装置５のシリンダ部６の先端に当て金２０を装着し、
油圧ユニット７からの送油によりシリンダ部６を伸張変
位させれば、当て金２０により管端部２ａが拡径変形し
て矯正される。この当て金２０としてその押圧面２０ａ
の曲率が管端部２ａの曲率に近い大形のものを使用して
いるので、上記管端部２ａは局部変形が回避される。With the above structure, when the roundness of the pipe end 2a of the steel pipe 2 is to be corrected, the pad 20 is attached to the tip of the cylinder portion 6 of the cylinder device 5 inserted into the pipe end 2a.
When the cylinder portion 6 is stretched and displaced by the oil supply from the hydraulic unit 7, the pipe end 2a is expanded and deformed by the pad 20 to be corrected. The pressing surface 20a as the pad 20
Since a large one having a curvature close to that of the tube end 2a is used, local deformation of the tube end 2a is avoided.
【００１３】一方、上記シリンダ部６を伸張させる際、
コントローラ２１の演算部２２では、シリンダ部６の変
位量に対する当て金押圧面２０ａと管端部２ａとの接触
面積の変化率を算出し、この接触面積の変化率に応じて
荷重値が変化するように制御部２３からの制御出力で油
圧ユニット７を制御する。すなわち、シリンダ部６の変
位量に対して接触面積が急激に増えた場合には、上記油
圧制御により、荷重値が急増することがないので、制御
がしやすくなり、精確に真円矯正を行なうことができ
る。On the other hand, when the cylinder portion 6 is extended,
The calculation unit 22 of the controller 21 calculates the rate of change of the contact area between the metal pressing surface 20a and the pipe end 2a with respect to the amount of displacement of the cylinder section 6, and the load value changes according to the rate of change of the contact area. Thus, the hydraulic unit 7 is controlled by the control output from the control unit 23. That is, when the contact area suddenly increases with respect to the amount of displacement of the cylinder portion 6, the load value does not suddenly increase due to the above-mentioned hydraulic pressure control, so that the control becomes easy and accurate roundness correction is performed. be able to.
【００１４】なお、上記の例では、鋼管矢板１の鋼管２
の管端部２ａを真円矯正するものを例に説明したが、鋼
管矢板１の鋼管２に限らず、他の管体の管端部を真円矯
正するものにも適用可能である。In the above example, the steel pipe 2 of the steel pipe sheet pile 1 is used.
In the above description, the pipe end 2a is straightened, but the present invention is not limited to the steel pipe 2 of the steel pipe sheet pile 1 and can be applied to other pipes that straighten other pipe ends.
【００１５】[0015]
【発明の効果】以上のように本発明によれば、シリンダ
部の先端に取り付けられている当て金として押圧面の曲
率が管端部の曲率に近い大形のものを使用したことによ
り、管端部の局部変形を防止でき、さらにシリンダ部の
伸張時にその変位量に対する当て金押圧面と管端部との
接触面積の変化率を算出し、この接触面積の変化率に応
じて荷重値が変化するような油圧制御を行なうので、制
御の煩雑さも招くことなく、高精度の真円矯正を行なう
ことができる。As described above, according to the present invention, since the large metal plate having the pressing surface having a curvature close to that of the pipe end is used as the pad attached to the tip of the cylinder portion, Local deformation of the end can be prevented, and the rate of change in the contact area between the pressure plate pressing surface and the pipe end with respect to the amount of displacement when the cylinder is extended is calculated. Since the changing hydraulic control is performed, highly accurate roundness correction can be performed without causing control complexity.
【図１】本発明の一実施例による鋼管矢板等の管端部真
円矯正方法を適用して矯正を行なうための構成図であ
る。FIG. 1 is a configuration diagram for performing straightening by applying a pipe end roundness correcting method for a steel pipe sheet pile according to an embodiment of the present invention.
【図２】従来の鋼管矢板等の管端部真円矯正方法を適用
して矯正を行なうための構成図である。FIG. 2 is a configuration diagram for performing correction by applying a conventional pipe end circularity correction method for a steel pipe sheet pile or the like.
【図３】鋼管矢板の変形の説明図である。FIG. 3 is an explanatory diagram of deformation of a steel pipe sheet pile.
２ 管体 ２ａ 管端部 ５ 油圧シリンダ装置 ６ シリンダ部 ２０ 当て金 ２０ａ 押圧面 2 Pipe 2a Pipe end 5 Hydraulic cylinder device 6 Cylinder 20 Abutment 20a Pressing surface
Claims (1)
ダ装置のシリンダ部の先端に、上記管端部の曲率に近い
曲率の押圧面をもった当て金を取り付け、上記シリンダ
部を伸張変位させて上記当て金を介して管端部を拡径変
形させる際に、上記シリンダ部の変位量に対する当て金
押圧面と管端部との接触面積の変化率を求め、この接触
面積の変化率に応じて荷重値が変化するように上記シリ
ンダ装置の油圧を制御しながら管端部の真円矯正を行な
うことを特徴とする鋼管矢板等の管端部真円矯正方法。1. A metal fitting having a pressing surface having a curvature close to the curvature of the pipe end is attached to the tip of the cylinder of the hydraulic cylinder device inserted into the pipe end of the pipe, and the cylinder is extended. When the pipe end is expanded and deformed by displacing it through the pad, the rate of change in the contact area between the pad pressing surface and the tube end with respect to the amount of displacement of the cylinder is calculated, and this change in contact area A method of straightening a pipe end portion of a steel pipe sheet pile or the like, wherein the pipe end portion is straightened while controlling the hydraulic pressure of the cylinder device so that the load value changes according to the rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34567691A JPH05177257A (en) | 1991-12-27 | 1991-12-27 | Device for straightening complete roundness of tube end of steel tube pile and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34567691A JPH05177257A (en) | 1991-12-27 | 1991-12-27 | Device for straightening complete roundness of tube end of steel tube pile and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05177257A true JPH05177257A (en) | 1993-07-20 |
Family
ID=18378215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34567691A Pending JPH05177257A (en) | 1991-12-27 | 1991-12-27 | Device for straightening complete roundness of tube end of steel tube pile and the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05177257A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699153A (en) * | 2012-06-12 | 2012-10-03 | 内蒙古包钢钢联股份有限公司 | Tub end rounding device and process for seamless steel tube |
| CN103567259A (en) * | 2012-07-19 | 2014-02-12 | 五冶集团上海有限公司 | Combined large-diameter and thin-shell cylinder roundness adjusting support, manufacturing method and application |
| CN105251818A (en) * | 2015-09-17 | 2016-01-20 | 怀宁县明慧竹业有限公司 | Round food steamer frame forming machine |
| CN106111825A (en) * | 2016-08-24 | 2016-11-16 | 中冶辽宁德龙钢管有限公司 | A kind of Portable steel pipe expander and diameter enlarging method |
| CN112122514A (en) * | 2020-08-18 | 2020-12-25 | 湖北红业建材科技开发有限公司 | Reinforced concrete well cover hoop shaping device and shaping method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6025294U (en) * | 1983-07-25 | 1985-02-20 | 藤田 博 | Microphone and speaker support device for full-face helmets |
| JPH03226313A (en) * | 1990-01-30 | 1991-10-07 | Kubota Corp | Correcting method for pipe |
-
1991
- 1991-12-27 JP JP34567691A patent/JPH05177257A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6025294U (en) * | 1983-07-25 | 1985-02-20 | 藤田 博 | Microphone and speaker support device for full-face helmets |
| JPH03226313A (en) * | 1990-01-30 | 1991-10-07 | Kubota Corp | Correcting method for pipe |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699153A (en) * | 2012-06-12 | 2012-10-03 | 内蒙古包钢钢联股份有限公司 | Tub end rounding device and process for seamless steel tube |
| CN103567259A (en) * | 2012-07-19 | 2014-02-12 | 五冶集团上海有限公司 | Combined large-diameter and thin-shell cylinder roundness adjusting support, manufacturing method and application |
| CN105251818A (en) * | 2015-09-17 | 2016-01-20 | 怀宁县明慧竹业有限公司 | Round food steamer frame forming machine |
| CN106111825A (en) * | 2016-08-24 | 2016-11-16 | 中冶辽宁德龙钢管有限公司 | A kind of Portable steel pipe expander and diameter enlarging method |
| CN112122514A (en) * | 2020-08-18 | 2020-12-25 | 湖北红业建材科技开发有限公司 | Reinforced concrete well cover hoop shaping device and shaping method |
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