EP0694348A1 - Méthode et presse pour la fabrication des grands tubes à partir de tÔles - Google Patents

Méthode et presse pour la fabrication des grands tubes à partir de tÔles Download PDF

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Publication number
EP0694348A1
EP0694348A1 EP95250147A EP95250147A EP0694348A1 EP 0694348 A1 EP0694348 A1 EP 0694348A1 EP 95250147 A EP95250147 A EP 95250147A EP 95250147 A EP95250147 A EP 95250147A EP 0694348 A1 EP0694348 A1 EP 0694348A1
Authority
EP
European Patent Office
Prior art keywords
press
tools
tube
bending
straightening
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
Application number
EP95250147A
Other languages
German (de)
English (en)
Other versions
EP0694348B1 (fr
Inventor
Hans Günter Schiffers
Rolf Hermes
Klaus Rehag
Peter Byroslawsky
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 Siemag AG
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0694348A1 publication Critical patent/EP0694348A1/fr
Application granted granted Critical
Publication of EP0694348B1 publication Critical patent/EP0694348B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/14—Particular arrangements for handling and holding in place complete dies
    • B21D37/145—Die storage magazines

Definitions

  • the invention relates to a working method for producing large tubes from sheet metal in a large tube press system with a press in which the tools for deforming the sheet are arranged to form a slotted tube.
  • UOE PROCESS There are essentially three methods used to produce large tubes from sheet metal plates, namely the UOE PROCESS, the three-roll bending method and the C-press method.
  • UOE UOE
  • a sheet of metal prepared in an edge bending press is fed to a U-press, in which the sheet is preliminarily rounded.
  • the pre-rounded sheet is then shaped in the O-press.
  • the edges are bent so that the desired tube radius extends to the slot during the later deformation to the slot tube and is a prerequisite for the circular shape of the welded tube in the later seam area.
  • the edge bending press usually consists of two presses which are slidably arranged on a common base frame and face each other. The bending tools for the edges are located on both sides of the sheet metal plate.
  • the sheet prepared in this way goes into the U-press, which consists of a press stand in welded construction, which is combined in a press frame.
  • the press cylinders are inserted, on the plunger of which the upper press ram with the press tools is attached.
  • Lateral pressure rollers and height-adjustable ones in the lower part of the press Prisms serve as abutments for the action of the upper press tool to bend the U-shaped down tube.
  • the sheet metal preformed in this way reaches the O-press, in which a number of individual presses which are dependent on the tube length are combined in a rigid frame construction.
  • the press bars are designed in such a way that a uniform distribution of the pressing forces onto the press cylinders provided is ensured, the upper press tools being fastened to the upper running bar which is guided on the press stand.
  • the upper tool forms the U-shaped front pipe into an O-pipe, the final calibration of which is guaranteed after the gap has been welded by a mechanical expander, ie widening of the pipe diameter.
  • the sheet edges are also pre-bent outside the machine, unless four-roll sheet bending machines are used, in which bending can also be carried out.
  • the three-roll bending machine consists of three long rolls, the length of which is limited by the possible support length.
  • the two bottom rollers which are smaller in diameter than the top roller, serve as abutments for the sheet metal deformed by the top roller, which is formed into an O-tube between the top roller and bottom rollers with adjustable back pressure. Subsequent straightening and calibration in a straightening and calibration press or using a mechanical expander is essential.
  • the C-press is also used to form a sheet pre-bent at the edges into a slotted tube.
  • the C-press system essentially consists of two staggered C-presses, which in turn consist of several C-shaped frames that are arranged side by side.
  • Each C-stand is equipped with a tool set consisting of an upper and a lower part.
  • the upper part of the tool is located on a vertically arranged sword, which is attached to the upper part of the frame.
  • the lower tool is located on a movable table, and usually consists of two longitudinally arranged, variable in spacing strips, which serve as an abutment for the sheet to be formed.
  • the sheet formed into an O-tube is also in this process undergo a straightening or calibration process or expand mechanically after welding.
  • the aim of the present invention is to find, starting from the known methods for large tube production, a working method and a press which is characterized by low investment costs and a small space requirement and is therefore also interesting for tube plants in which - for example because of smaller quantities - large ones Not profitable investment costs.
  • a working method is proposed according to the invention, which is characterized in that the working steps bending, molding, calibrating and straightening are carried out in succession in one and the same press after exchanging the respectively required tools.
  • a press for the production of large pipes and metal sheets according to the working method of the present invention is therefore characterized by interchangeable bending, forming, calibrating and straightening tools and a manipulator for inserting and replacing the respective tools.
  • the manipulator consists of an interchangeable carriage which can be moved laterally out of the press and into the latter together with the tool to be exchanged in the longitudinal direction of the pipe to be shaped.
  • the change trolley holds the tools from where they can be transported in waiting positions or in preparation shops.
  • two interchangeable carriages are provided which can be used alternately. Prepared tools can thus be exchanged quickly, whereby - as is known in the case of roll changing units in rolling mills - the changing carriages are arranged on a transverse shifting device and can be moved into the changing position and possibly remain in the press with the respective tool.
  • the present invention considerably simplifies large pipe systems, so that even if the press used has to be adapted to the multifunctional functions by appropriate means, there are still significant savings in investment costs.
  • the required space is reduced considerably.
  • the press according to the invention is shown in three views; it consists of the press frame 1, the foundation 2 is fixed and consists of the portals 1a and 1b, which are connected to one another via longitudinal bars 3.
  • the press cylinders 4, whose pistons 5 act on the bending beam, are supported on the longitudinal spars.
  • the tools required for the bending and straightening process are interchangeably connected to the bending beam 15 and the table 7.
  • the upper tool is designed as a sword 6.
  • Fig.2 calibration and straightening tools are provided.
  • tool change carriages are provided on which the necessary tools are built, and the tools can also be carried out directly as change carriages.
  • the carriages are moved in and out via a rail system 10 ; 12, so that the tool change can be carried out during the idle times of the press and the availability of the press itself is increased.
  • the change carriage with attached tools remains in the press, in this case at least two carriages are required. However, it is also possible to use a carriage that is inserted into the press for the respective tool change.
  • the rail system is arranged in front of the press in such a way that the respective tool can be used quickly and efficiently by means of transverse processes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP95250147A 1994-07-25 1995-06-20 Méthode et presse pour la fabrication des grands tubes à partir de tôles Expired - Lifetime EP0694348B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4426800A DE4426800A1 (de) 1994-07-25 1994-07-25 Arbeitsverfahren und Presse zum Herstellen von Großrohren aus Blechtafeln
DE4426800 1994-07-25

Publications (2)

Publication Number Publication Date
EP0694348A1 true EP0694348A1 (fr) 1996-01-31
EP0694348B1 EP0694348B1 (fr) 2000-11-15

Family

ID=6524386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95250147A Expired - Lifetime EP0694348B1 (fr) 1994-07-25 1995-06-20 Méthode et presse pour la fabrication des grands tubes à partir de tôles

Country Status (3)

Country Link
EP (1) EP0694348B1 (fr)
CZ (1) CZ289821B6 (fr)
DE (2) DE4426800A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017220393A1 (fr) * 2016-06-22 2017-12-28 Theodor Gräbener GmbH & Co. KG Dispositif pour calibrer et dresser des pièces creuses et procédé à mettre en œuvre avec un dispositif de ce type
EP3640016A1 (fr) * 2019-08-21 2020-04-22 Primetals Technologies France SAS Presse pour produit métallique et méthode associée

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1183465B (de) * 1962-02-01 1964-12-17 Siempelkamp Gmbh & Co Biegewerkzeug zum Herstellen von zylindrischen oder konischen Rohren aus ebenen Blechzuschnitten
JPS591022A (ja) * 1982-06-28 1984-01-06 Kawasaki Steel Corp Ｏプレスの型替装置
JPH02220715A (ja) * 1989-02-22 1990-09-03 Maru Kikai Kogyo Kk 金型交換装置
US5051051A (en) * 1990-05-16 1991-09-24 Simonsen Iron Works, Inc. Rack and die mover

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1183465B (de) * 1962-02-01 1964-12-17 Siempelkamp Gmbh & Co Biegewerkzeug zum Herstellen von zylindrischen oder konischen Rohren aus ebenen Blechzuschnitten
JPS591022A (ja) * 1982-06-28 1984-01-06 Kawasaki Steel Corp Ｏプレスの型替装置
JPH02220715A (ja) * 1989-02-22 1990-09-03 Maru Kikai Kogyo Kk 金型交換装置
US5051051A (en) * 1990-05-16 1991-09-24 Simonsen Iron Works, Inc. Rack and die mover

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 083 (M - 290) 17 April 1984 (1984-04-17) *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 523 (M - 1049) 16 November 1990 (1990-11-16) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017220393A1 (fr) * 2016-06-22 2017-12-28 Theodor Gräbener GmbH & Co. KG Dispositif pour calibrer et dresser des pièces creuses et procédé à mettre en œuvre avec un dispositif de ce type
US11344939B2 (en) 2016-06-22 2022-05-31 Theodor Gräbener GmbH & Co. KG Device for calibrating and straightening hollow components and method using such a device
EP3640016A1 (fr) * 2019-08-21 2020-04-22 Primetals Technologies France SAS Presse pour produit métallique et méthode associée

Also Published As

Publication number Publication date
DE4426800A1 (de) 1996-02-01
DE59508854D1 (de) 2000-12-21
CZ185495A3 (en) 1996-04-17
CZ289821B6 (cs) 2002-04-17
EP0694348B1 (fr) 2000-11-15

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