US20110226032A1 - Pipe-bending press - Google Patents

Pipe-bending press Download PDF

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Publication number
US20110226032A1
US20110226032A1 US13/050,972 US201113050972A US2011226032A1 US 20110226032 A1 US20110226032 A1 US 20110226032A1 US 201113050972 A US201113050972 A US 201113050972A US 2011226032 A1 US2011226032 A1 US 2011226032A1
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US
United States
Prior art keywords
supports
center tool
plate
brace body
tool
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.)
Abandoned
Application number
US13/050,972
Other languages
English (en)
Inventor
Uwe Feldmann
Manfred Kolbe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Group GmbH
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to SMS MEER GMBH reassignment SMS MEER GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FELDMANN, UWE, KOLBE, MANFRED
Publication of US20110226032A1 publication Critical patent/US20110226032A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes

Definitions

  • the present invention relates to a pipe-bending press. More particularly this invention concerns a method of operating such a press to deform a planar plate into a U- or C-section shape for the manufacture of welded pipe
  • the invention relates to a method of making welded pipe from metallic plate on a pipe-bending press, and to a pipe-bending press that is provided with a lower support tool in a base frame consisting of two adjacent supports that are at a spacing from each other, and an upper tool that can be moved vertically downward toward the lower supports and that is carried on a support that can be lifted and lowered and that extends the entire length of the metal plate so that it can apply a bending force to the plate sitting on the lower supports.
  • the transformation of metal plate into welded pipe includes several steps.
  • First, the normally planar thick metal plate is bent by being supported along its two parallel outer longitudinal edges and pushed toward the supports along a midline, thereby imparting to the planar plate a U-section. This is typically done in two steps.
  • the outer edges of the U-section intermediate workpiece are bent inward toward each other, preferably so as to touch. This is done normally by pushing the intermediate workpiece through a plurality of arrays of rollers forming a shape increasingly corresponding to a closed circle.
  • Finally the seam is welded from outside and in some cases also from inside, and the joint is machined smooth.
  • a generic O-press of this type in closed-frame construction mode has become known from U.S. Pat. No. 5,390,520.
  • the vertically shiftable center tool is guided in the lateral uprights of the frame and connected via cardan joints to piston-cylinder units secured to horizontal beams bridging the uprights.
  • the two lower support tools are carried on a row of further cylinders braced on crosspieces extending between the uprights, each lower cylinder being coaxial with one of the upper cylinders.
  • the opposite piston-cylinder units are intended to compensate for bending of the frame under the considerable reaction load from deforming the thick plate workpiece, which load is lower toward the ends.
  • Another object is the provision of such an improved pipe-bending press that overcomes the above-given disadvantages, in particular that imparts a perfectly rounded and straight shape to the plate workpiece.
  • Yet another object is to provide a method and apparatus for making large-diameter workpieces for the manufacture of welded pipe at high speed.
  • a flat metal plate for the manufacture of pipe is first oriented generally horizontally on horizontally spaced and longitudinally extending supports.
  • a longitudinally extending center tool is pressed down against the workpiece between the supports so as to downwardly plastically deform the workpiece while simultaneously a brace body is pressed with an upward force against the plate directly opposite the center tool so as to hold the plate in contact with the center tool.
  • the center tool and brace body are then synchronously displaced downward relative to the supports with the plate clamped between the center tool and brace body.
  • the metal plate is clamped during the entire bending process by a brace body that is pressed below against the lower face of the workpiece and therethrough against the upper tool.
  • a brace body that is pressed below against the lower face of the workpiece and therethrough against the upper tool.
  • the metal workpiece plate By clamping the metal plate during the entire bending process, namely by means of the brace body and its actuator, which, according to an advantageous proposal of the invention in the center between the supports of the lower tool with its force application center at the level of the longitudinal axis of the mount of the upper tool, the metal workpiece plate never separates from the tools. No out-of-roundness of the pipe occurs, nor is an extension of the cycle time required, which improves productivity.
  • a pipe-bending press that is especially suitable for performing the method in accordance with the invention has, underneath the lower tool aligned with the level of the longitudinal axis of the mount of the upper tool, a brace body engageable upwardly with the metal plate.
  • the metal plate thus is clamped at several points, namely on the upper tool that has a width of a size corresponding to the spacing between the two supports of the lower tool, and the two supports of the lower tool that are at a distance from each other, as well as against the brace body that bears upward against the workpiece center, continually lifting or pressing the metal plate against the lower face of the upper tool that has curved shape.
  • the brace body is connected with a piston rod of a hydraulic or pneumatic cylinder attached to a pressure accumulator, which makes simple application of the brace body force possible and thus clamping of the metal plate.
  • the pressure accumulator ensures an elastic, force-dependent, automatic resilience of the brace body in a simple manner at continual clamping of the metal plate, even during while the bending process is progressing, all under the management of a simple controller.
  • An alternative suggestion of the invention provides that the bending force that is exerted by the actuator onto the upper tool, which can be lifted and lowered, and the cylinder of the brace body to control the counter force that depends on the bending force by means of lowering movements of the brace body over a measurement and control device, are connected with each other.
  • path-dependent control can be used.
  • FIG. 1 is a side schematic view illustrating the invention at the start of a bending operation
  • FIG. 2 is a view like FIG. 1 at a later stage of the operation.
  • a planar metal plate 1 with parallel longitudinal edges is positioned for deformation into a open seam tube is set on two supports 2 a and 2 b set at a transverse spacing from each other and forming a lower tool.
  • a broad upper tool 4 has a part-cylindrical lower surface 3 centered on an axis lying in a vertical plane 12 and is carried on a vertically displaceable horizontal mount 5 that is formed by a rigid beam and that can be raised and lowered by a schematically illustrated actuator 6 fixed to a machine frame 14 .
  • a hydraulic actuator 7 underneath the metal plate 1 is provided in the center between the supports 2 a and 2 b of the lower tool. It consists of a cylinder 8 fixed on the frame 14 and having a piston rod 9 carrying at its upper end brace body 10 vertically displaceable by the actuator 7 on the plane 12 .
  • the cylinder 8 is attached to a pressure buffer or accumulator 13 and bears on a lower face of the workpiece plate 1 at a central point 11 on the plane 12 of the mount 5 of the upper tool 4 (see FIG. 2 ).
  • a controller 15 ( FIG. 2 only) operates both the actuators 6 and 7 .
  • the upper actuator 6 is operated to push down the upper tool 4 while the lower actuator 7 is maintained under sufficient pressure to hold the workpiece 1 at point 11 tightly against the lower face 4 of the tool.
  • the upper tool 4 which is of a transverse width equal to or slightly less than the clear distance between the two lower tools 2 a and 2 b, is moved downward as shown in FIG. 2 to impart to at least that portion of the workpiece 1 a shape corresponding exactly to that of the lower tool face 3 . Since the workpiece 1 is at all times clamped between the tool 1 and the brace body 10 , it will not shift transversely in the press and the resultant shape will be perfectly uniform.
  • the brace body 10 with the pressure accumulator 13 moves downward and acts as a virtual spring even though it is follows the bending process, while always bearing on the metal plate 1 and ensuring it remains in contact with the entire lower face 3 of the upper tool 4 .
  • the brace body 10 being maintained at the center at the location 11 of the action, a lifting off of metal plate 1 from upper tool 4 is avoided and thus the geometry or the roundness of the slot pipe that is to be formed is not changed disadvantageously.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US13/050,972 2010-03-19 2011-03-18 Pipe-bending press Abandoned US20110226032A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010012063.4 2010-03-19
DE102010012063A DE102010012063A1 (de) 2010-03-19 2010-03-19 Verfahren zum Herstellen von Schlitzrohren aus Blechtafeln auf einer Rohrbiegepresse und Rohrbiegepresse

Publications (1)

Publication Number Publication Date
US20110226032A1 true US20110226032A1 (en) 2011-09-22

Family

ID=44342973

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/050,972 Abandoned US20110226032A1 (en) 2010-03-19 2011-03-18 Pipe-bending press

Country Status (4)

Country Link
US (1) US20110226032A1 (de)
EP (1) EP2366471A3 (de)
JP (1) JP5615738B2 (de)
DE (1) DE102010012063A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116116952A (zh) * 2023-04-13 2023-05-16 山西八建集团有限公司 一种便于多角度折弯的无损弧形管道加工机床

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104175057B (zh) * 2014-07-29 2016-08-24 安徽省宁国市东波紧固件有限公司 一种钢丝挡圈专用整形装置
CN106270032A (zh) * 2016-11-17 2017-01-04 讯龙型材折弯（合肥）有限公司 一种u形折弯机构
CN109351853A (zh) * 2018-11-05 2019-02-19 南通江华热动力机械有限公司 一种三维弯管复合成型工装
CN112355139B (zh) * 2020-10-28 2022-05-20 深圳市弗镭斯激光技术有限公司 一种板件压弯卷制成型方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5524779A (en) * 1978-08-14 1980-02-22 Nippon Steel Corp U-forming method and apparatus in uo-steel tube manufacturing process
US4373371A (en) * 1980-12-29 1983-02-15 Ford Motor Company Method of reducing springback in mechanically pressed sheet materials-I
JPS5942123A (ja) * 1982-09-03 1984-03-08 Shiga Seikan Kk 金属板を円筒形に成形する方法
US4912957A (en) * 1989-04-28 1990-04-03 Dayton Rogers Manufacturing Company Smart straightening press
US5390520A (en) * 1992-05-15 1995-02-21 Mannesmann Aktiengesellshaft Closed-frame type pipe-bending press
US5557964A (en) * 1994-01-19 1996-09-24 Demmer Corporation Double plane bend former
US5901601A (en) * 1997-04-25 1999-05-11 Toyota Jidosha Kabushiki Kaisha Method and apparatus for bending malleable plates
US6959573B2 (en) * 2000-08-11 2005-11-01 Amada Company, Limited Bending method and device therefore
US7921689B2 (en) * 2005-09-26 2011-04-12 Unico, Inc. Pneumatic biasing of a linear actuator and implementations thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6610068U (de) * 1966-07-30 1973-02-15 Paul Wuenn Rohrbiegemaschine.
DE2641573C3 (de) * 1976-09-13 1981-06-11 Mannesmann AG, 4000 Düsseldorf Blechbiegepresse
JPS6044129A (ja) * 1983-08-17 1985-03-09 Sumitomo Metal Ind Ltd Ｕプレス装置における成形方法及び装置
JP2517361B2 (ja) * 1988-05-30 1996-07-24 秀夫 小川 知能曲げプレス
JP3171798B2 (ja) * 1996-10-03 2001-06-04 株式会社アマダ プレスブレーキによる折曲げ加工方法及び同方法に使用するプレスブレーキ
JP2004195504A (ja) * 2002-12-18 2004-07-15 Nippon Steel Corp 鋼管の成形装置、成形方法、及び製造設備列

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5524779A (en) * 1978-08-14 1980-02-22 Nippon Steel Corp U-forming method and apparatus in uo-steel tube manufacturing process
US4373371A (en) * 1980-12-29 1983-02-15 Ford Motor Company Method of reducing springback in mechanically pressed sheet materials-I
JPS5942123A (ja) * 1982-09-03 1984-03-08 Shiga Seikan Kk 金属板を円筒形に成形する方法
US4912957A (en) * 1989-04-28 1990-04-03 Dayton Rogers Manufacturing Company Smart straightening press
US5390520A (en) * 1992-05-15 1995-02-21 Mannesmann Aktiengesellshaft Closed-frame type pipe-bending press
US5557964A (en) * 1994-01-19 1996-09-24 Demmer Corporation Double plane bend former
US5901601A (en) * 1997-04-25 1999-05-11 Toyota Jidosha Kabushiki Kaisha Method and apparatus for bending malleable plates
US6959573B2 (en) * 2000-08-11 2005-11-01 Amada Company, Limited Bending method and device therefore
US7921689B2 (en) * 2005-09-26 2011-04-12 Unico, Inc. Pneumatic biasing of a linear actuator and implementations thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116116952A (zh) * 2023-04-13 2023-05-16 山西八建集团有限公司 一种便于多角度折弯的无损弧形管道加工机床

Also Published As

Publication number Publication date
JP5615738B2 (ja) 2014-10-29
DE102010012063A1 (de) 2011-09-22
EP2366471A2 (de) 2011-09-21
JP2011194471A (ja) 2011-10-06
EP2366471A3 (de) 2014-01-22

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SMS MEER GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FELDMANN, UWE;KOLBE, MANFRED;REEL/FRAME:026089/0576

Effective date: 20110325

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION