WO2022128734A1 - Agencement, procédé et unité de dressage pour roulage de la région d'extrémité avec les deux extrémités de tubes fortement cintrés à l'aide d'une machine de roulage à trois cylindres - Google Patents

Agencement, procédé et unité de dressage pour roulage de la région d'extrémité avec les deux extrémités de tubes fortement cintrés à l'aide d'une machine de roulage à trois cylindres Download PDF

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Publication number
WO2022128734A1
WO2022128734A1 PCT/EP2021/084985 EP2021084985W WO2022128734A1 WO 2022128734 A1 WO2022128734 A1 WO 2022128734A1 EP 2021084985 W EP2021084985 W EP 2021084985W WO 2022128734 A1 WO2022128734 A1 WO 2022128734A1
Authority
WO
WIPO (PCT)
Prior art keywords
measuring device
straightening unit
straightening
roller
tube
Prior art date
Application number
PCT/EP2021/084985
Other languages
German (de)
English (en)
Inventor
Dieter Kapp
Original Assignee
Theodor Gräbener GmbH & Co. KG
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 Theodor Gräbener GmbH & Co. KG filed Critical Theodor Gräbener GmbH & Co. KG
Priority to EP21839043.3A priority Critical patent/EP4259355A1/fr
Publication of WO2022128734A1 publication Critical patent/WO2022128734A1/fr

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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
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0822—Guiding or aligning the edges of the bent sheet
    • 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
    • B21D5/006—Bending sheet metal along straight lines, e.g. to form simple curves combined with measuring of bends

Definitions

  • pointed-bent tubes are understood to mean tubes that are made from a bent sheet of metal that is rounded over a large part of the circumference with an approximately constant radius, but which is bent on both sides of the joint at which the open ends of the sheet are connected to one another (e.g welded), has a connection area that is still unbent or has only a small, insufficient curvature, which encompasses the two ends.
  • the invention relates to 3-roll bending machines which are suitable for bending pipes with a large diameter and with which, according to the prior art, only pointed-bent pipes can be produced.
  • 3-roll bending machines which are used, for example, for the production of offshore pipes, in boiler construction and in general apparatus construction.
  • such pipes are often further processed as pointed-bent pipes and installed and used at their places of use.
  • the 4-roller bending machines are significantly more expensive to purchase (investment costs).
  • Such pipes usually have diameters between 4 m and 12 m, ie radii that vary between 2 m and 6 m.
  • the usual wall thicknesses of such pipes are between 100 mm and 200 mm.
  • the lengths of such pipes are usually a maximum of 5 m, in particular between 1 m and 4.5 m.
  • Steel is used in particular as the material, which is not only available relatively inexpensively, but is also easy to process further, in particular by welding, for example around which To connect longitudinal joint extending longitudinally of the pipe after the bending process and/or to connect several pipes to one long pipe. In practice, however, any other or more special materials are also used, in particular composite materials and stainless steel.
  • the object of the invention is to increase the usability of a 3-roller bending machine by providing an arrangement, a method and a straightening unit that enable the production of a high-quality tube geometry using the top roller of a 3-roller bending machine .
  • An arrangement according to the invention for round bending the connection area with the ends of pointed-bent tubes with a 3-roll bending machine a) a 3-roller bending machine with a height-adjustable upper roller, a straightening element and two lower rollers, b) a straightening unit with (at least) one height-adjustable punch, which is arranged to project through a free space between the lower rollers, and c) a measuring device for determining the radius of a tube arranged in the 3-roller bending machine, at least in a tube section which extends between the support points of the tube on the two lower rolls.
  • Such an arrangement makes it possible to position a pointed-bent tube on the bottom rolls in such a way that the abutting side is oriented downwards and is located between the bottom rolls.
  • the distance between the lower rollers is adjustable and is set relative to one another in such a way that the pointed-bent section is completely visible and accessible from the underside.
  • the pointed-bent end can be bent round within the 3-roll bending machine through the interaction of the upper roll with the at least one straightening element, the straightening unit and the measuring device.
  • the approaching one another can be achieved by moving the top roller with the straightening element in the direction of the ram (in particular downwards), by moving the ram of the straightening unit in the direction of the top roller with the straightening element, or by a combination of these two movements.
  • the ram with or without an associated lifting unit—is arranged such that it can be folded, moved or otherwise temporarily removed, in particular around the area between the two lower rollers and/or a crossbeam to which the ram is attached to be able to use it temporarily for other purposes.
  • the two bottom rolls of a 3-roll bending machine are usually mounted in separate bearing stands, which support shafts or axles of the bottom rolls.
  • the straightening unit is preferably designed in such a way that it can be positioned between the corresponding bearing stands.
  • the measuring device is an optical measuring device and/or the measuring device is arranged to interact with the straightening unit and/or the top roller.
  • a laser measuring device is particularly suitable as an optical measuring device, preferably a laser measuring device with which a large number of measuring beams can be emitted simultaneously or sequentially at a very short cycle rate in order to determine the curvature and in particular the radius of a surface from the measured distances. It is additionally pointed out that other measuring devices can also be used or can be used as an alternative, in particular wave-based measuring devices, such as ultrasonic measuring devices.
  • a cooperating arrangement of measuring device and straightening unit means in particular that the measuring device and the straightening unit and/or the measuring device and the top roller are coupled to one another - for example by means of a controller - in such a way that, based on measured values from the measuring device, control commands are sent to the straightening unit and/or can be sent to the top roller, for example to move or control the punch and/or the top roller in a targeted manner in such a way that a radius within a target tolerance is achieved.
  • the straightening unit has a traversing unit that can be moved in at least one horizontal direction.
  • a possibility of movement in an axial direction of the rollers can be provided, i.e. parallel to the axes of rotation of the lower rollers and the upper roller.
  • a corresponding displacement unit can be implemented in particular by means of a carrier designed as a carriage, which is arranged on a suitable frame so that it can be displaced.
  • Such a carriage can be designed to slide or have roller bearings. Due to the lower friction, roller bearings are preferred, in particular by means of rollers.
  • a traversing unit can be dispensed with entirely if a sufficient number of height-adjustable stamps with measuring devices assigned to the stamps are provided over the length of a pipe to be processed.
  • a punch can be provided, for example at a distance of 500 mm from each other, in order to roundly bend a tube with pointed ends and with a length of several meters over the entire length in the area of the pointed ends.
  • the invention also relates to a method for round bending the connection area with the ends of pointed-bent pipes, in which a pipe with the pointed-bent ends oriented downwards is arranged between the upper roller and the two lower rollers of a 3-roll bending machine, with between the upper roller and the pipe at least one straightening element is positioned and wherein a) using a straightening unit with at least one height-adjustable stamp, which is arranged to project through a free space between the bottom rollers, the distance between the straightening element and the stamp is reduced in order to bend the ends - by applying force - and b) the radius of the ends produced by bending is determined using a measuring device.
  • steps a) and b) are repeated one after the other until the radius determined by means of the measuring device is within a desired value range.
  • a target value range for the radius between 4.01 m and 3.99 m can be specified in order to then repeat steps a) and b) until a radius in the target value range is reached for the first time . If during an application of the method it is found that the target value range is first exceeded and then fallen below, the target value range has been missed. It is then advisable to adapt the procedure for processing other identical tubes by increasing the force in smaller ones discrete steps and/or the setpoint range is selected to be larger.
  • the straightening unit is designed to be movable in the longitudinal direction of the tube to be bent, and the method is repeated several times in order to bend the ends in the area of different length sections.
  • This embodiment has already been described above in connection with a traversing unit, which is realized in particular by means of a traversing carriage. It is particularly suitable in connection with a - compared to the 3-roller bending machine - compact straightening unit with a traversing unit and at least one stamp, which has a significantly shorter length than the upper roller and the two lower rollers.
  • the radius is also determined with the measuring device while the ends of a tube are being bent. It is necessary to select a suitable measuring device and to align it and position it relative to the other elements of an arrangement according to the invention in such a way that the measuring device can determine and process a sufficient number of measured values even during bending so that the radius can be determined.
  • the sharp-bent ends of a pipe can be bent quickly and precisely, in particular by continuously increasing the bending force until the measured radius is within a target value range.
  • a straightening unit for rounding the connection area with the ends of pointed-bent pipes together with a 3-roller bending machine, in particular with the top roller of such a 3-roller bending machine, the straightening unit having a height-adjustable stamp and at least one measuring device for determining the Has radius of the tube in an effective range of the stamp.
  • the measuring device must be designed and arranged in such a way that it is directed towards a surface of a pointed end to be machined, which changes its curvature under the influence of an effective surface of the punch.
  • This can be done in particular by arranging the active surface and the stamp in the same orientation on the straightening unit in such a way that the stamp and the measuring device can be used at the same time.
  • a laser measuring device is particularly suitable as a measuring device, which can emit measuring beams, in particular a fan-shaped bundle of rays, and determine the distance and a resulting geometry, in particular radii.
  • the measuring device has a laser measuring device and/or the stamp is functionally coupled to a traversing unit, by means of which the stamp—in addition to a vertical direction—is also slidably mounted perpendicular to the vertical direction.
  • the stamp in addition to a vertical direction—is also slidably mounted perpendicular to the vertical direction.
  • Fig. 1 shows an arrangement with a 3-roller bending machine and a straightening unit before the forming of the connection area with the two ends of a pointed-shaped pipe and
  • FIG. 2 shows the arrangement from FIG. 1 during or at the end of a reshaping of the connection area with the two ends of the pipe.
  • Figures 1 and 2 show an arrangement according to the invention with a 3-roller bending machine 10, of which a first bottom roll 12, a second bottom roll 14 and the lower part of a top roll 16 are shown.
  • the two lower rollers 12, 14 are arranged symmetrically in relation to the upper roller 16.
  • the upper roller is arranged centrally above the two lower rollers 12, 14, and the lower rollers both have the same diameter.
  • the diameter of the lower rollers is between 500 and 1,500 mm, in particular 1060 mm.
  • the diameter of the top roller 16 is larger and is between 900 mm and 2,000 mm, in particular around 1,320 mm.
  • the arrangement also includes a straightening unit 18 which is arranged between the two bottom rollers 12, 14 viewed in the horizontal direction.
  • the straightening unit 18 essentially comprises a frame 20 and a lifting unit 22 with a stamp 24 which is designed to be movable in the direction of the double arrow 26 (here: in the vertical direction).
  • FIG. 1 shows the punch 24 in a lower position before a bending process, ie the contact surface 36 of the punch 24 is not in contact with the outside A of a tube 30 that is still to be bent, of which only the lower section is shown.
  • the tube 30 is still unbent over a certain length, starting from the two ends 28a, 28b. Nevertheless, the ends 28a, 28b are connected to one another in the area of the inside I by welding. This results in a gap in the area of the outside A of the ends 28a, 28b.
  • the aim of the bending process is to bend the unbent end sections, which extend in an area between the two support points A1, A2 of the tube 30 on the lower rollers 12, 14 to the ends 28a, 28b, to bend in such a way that the radius is approximately the same as that of the remaining outer surface A of the tube 30.
  • the stamp 24 is shown in FIGS. 1 and 2 as a rectangle only as an example.
  • the stamp 24 has a contact surface 36 which at least partially makes contact with the outside of the tube 30 during the bending process.
  • the contact surface 36 can also have any other desired shape, in particular a curved shape.
  • a straightening element 32 is arranged between the top roller 16 and the inside I of the tube 30 .
  • the aligning element 32 has an approximately rectangular cross-sectional shape and a groove-like recess 34 oriented inwards in cross-section. This results in two contact areas K1, K2 between the straightening element 32 and the inside I of the pipe 30.
  • the frame of the straightening unit 20 is formed by a carrier 38 with a rectangular cross section, on which a cross member 40 is mounted.
  • the carrier 38 is fastened in two bearing stands, not shown in the figures, which form the basis for the bearing of all the rolls 12, 14, 16.
  • the cross member 40 is U-shaped and is mounted on rollers 42 perpendicular to the plane of the drawing so that it can be moved relative to the carrier 38 in the manner of a carriage.
  • a drive unit 44 is arranged on the crossbeam 40, which provides both a drive for moving the crossbeam 40 relative to the beam 38 and a drive for moving the ram 24 in the direction of the double arrow 26.
  • the combination of the crossbeam 40 and the drive unit 44 can be regarded as a traversing unit insofar as it enables the stamp 24 to be moved perpendicularly to the plane of the drawing.
  • the measuring device 46 With the measuring device 46, distances and the resulting curvature or the respective radius of the outside A of the pipe 30 can be detected within a fan-shaped measuring area 48, represented by a dashed trapezoid.
  • the measuring device 46 is arranged in such a way that the curvature of the outside can also be recorded while the stamp 24 is acting on the pipe 30 .
  • Figure 2 shows the stamp 24 in an upper position with contact to the outside A of the two ends 28a, 28b of the already bent tube 30.
  • the bending process is already complete because on the outside A of the tube 30 there is a contour with a constant radius is formed, which also extends over the connection area between the support points A1, A2.
  • Both the straightening element 32 with the top roller 16 and the stamp 24 of the straightening unit 18 can serve as counter bearings when the bending forces are applied.
  • the measuring device is preferably used—at least then—when a bending force is no longer acting on a pipe 30 that is located in the 3-roller bending machine 10 and is subjected to a bending force.
  • a bending force is no longer acting on a pipe 30 that is located in the 3-roller bending machine 10 and is subjected to a bending force.
  • an iterative procedure is necessary in order to achieve a target value range for a radius in the area of the outside A of a tube 30, in which bending processes and measurements alternate. If a target value range is reached, the bending process can be completed and the punch 24 of the straightening unit 18 can be lowered. If the pipe 30 is to be processed at several points by the straightening unit 18, the ram 24 is moved by the traversing unit to the next point of use after the target value range has been reached, and the process is then repeated there in the same way.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

L'invention concerne un agencement, un procédé et une unité de dressage (18) pour le roulage de la région de liaison avec les extrémités (28a, 28b) de tubes fortement cintrés ensemble à l'aide d'une machine de roulage à trois cylindres (10). Un agencement selon l'invention pour le roulage de la région de liaison avec les extrémités (28a, 28b) de tubes fortement cintrés (30) à l'aide d'une machine de roulage à trois cylindres (10) comprend : a) une machine de roulage à trois cylindres (10) avec un cylindre supérieur réglable en hauteur (16), un élément de dressage (32) et deux cylindres inférieurs (12, 14), b) une unité de dressage (18) ayant un poussoir réglable en hauteur (24) qui est agencé de façon à s'étendre à travers un jeu entre les cylindres inférieurs (12, 14), et c) un dispositif de mesure (46) pour la détermination du rayon d'un tube (30), agencé dans la machine de roulage à trois cylindres (10), au moins dans une section de tube qui s'étend entre des points d'appui (A1, A2) du tube sur les deux cylindres inférieurs (12, 14).
PCT/EP2021/084985 2020-12-14 2021-12-09 Agencement, procédé et unité de dressage pour roulage de la région d'extrémité avec les deux extrémités de tubes fortement cintrés à l'aide d'une machine de roulage à trois cylindres WO2022128734A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21839043.3A EP4259355A1 (fr) 2020-12-14 2021-12-09 Agencement, procédé et unité de dressage pour roulage de la région d'extrémité avec les deux extrémités de tubes fortement cintrés à l'aide d'une machine de roulage à trois cylindres

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020133419.2 2020-12-14
DE102020133419.2A DE102020133419B4 (de) 2020-12-14 2020-12-14 Anordnung, Verfahren und Richteinheit zum Rundbiegen des Endbereichs mit den beiden Enden spitzgebogener Rohre mit einer 3-Walzen-Biegemaschine

Publications (1)

Publication Number Publication Date
WO2022128734A1 true WO2022128734A1 (fr) 2022-06-23

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Country Status (3)

Country Link
EP (1) EP4259355A1 (fr)
DE (1) DE102020133419B4 (fr)
WO (1) WO2022128734A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065953A1 (fr) * 1980-08-18 1982-12-08 Sl Tuotanto Oy Dispositif de fabrication d'un tube metallique.
WO2012092909A1 (fr) * 2011-01-07 2012-07-12 Technische Universität Dortmund Procédé pour la transformation incrémentielle de structures en tôle, en particulier pour la transformation de tubes ou similaires
EP3363553A1 (fr) * 2017-02-15 2018-08-22 Conception Machines Faveyrial Machine de roulage de tôles, ainsi que procédé de roulage d'une tôle utilisant une telle machine de roulage

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE588960C (de) 1931-10-04 1933-12-01 Mannesmann Ag Vorrichtung zum gleichzeitigen Rundbiegen der beiden geraden Blechstosskanten von auf Drei- oder Vierwalzenbiegemaschinen gebogenen Rohrschuessen
DE1085839B (de) 1959-02-09 1960-07-28 Berg Roehrenwerk Geb Verfahren zum Biegen von staerkeren Blech-, insbesondere Stahlblechplatten, zu laengsgeschlitzten Hohlkoerpern, z. B. Rohren, und Vorrichtung zur Durchfuehrung des Verfahrens
DE2307134A1 (de) 1973-02-14 1974-08-22 Ferndorf Eisen Metall Vorrichtung zum anbiegen der enden von blechen
DE2952131A1 (de) 1979-12-22 1981-07-02 Thyssen Industrie Ag, 4300 Essen Nachbiegeeinrichtung fuer schlitzrohre
DE3041212C2 (de) 1980-11-03 1982-08-26 August Wilhelm 5901 Wilnsdorf Schäfer Vorrichtung zum Biegen, insbesondere Runden von Blechen oder Profilen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065953A1 (fr) * 1980-08-18 1982-12-08 Sl Tuotanto Oy Dispositif de fabrication d'un tube metallique.
WO2012092909A1 (fr) * 2011-01-07 2012-07-12 Technische Universität Dortmund Procédé pour la transformation incrémentielle de structures en tôle, en particulier pour la transformation de tubes ou similaires
EP3363553A1 (fr) * 2017-02-15 2018-08-22 Conception Machines Faveyrial Machine de roulage de tôles, ainsi que procédé de roulage d'une tôle utilisant une telle machine de roulage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
THOME MARIO ET AL: "On course to smart large-diameter pipe production", PROCEDIA MANUFACTURING, vol. 29, 1 January 2019 (2019-01-01), 43rd North American Manufacturing Research Conference, NAMRC 43, 8-12 June 2015, UNC Charlotte, North Carolina, United States, pages 544 - 551, XP055890641, ISSN: 2351-9789, Retrieved from the Internet <URL:https://www.sciencedirect.com/science/article/pii/S2351978919301726/pdf?md5=4cc835bc33160ecf51a2e488dc58f7d7&pid=1-s2.0-S2351978919301726-main.pdf> DOI: 10.1016/j.promfg.2019.02.139 *

Also Published As

Publication number Publication date
DE102020133419B4 (de) 2023-05-11
EP4259355A1 (fr) 2023-10-18
DE102020133419A1 (de) 2022-06-15

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