WO2009059582A2 - Machine de pliage pour feuilles de tôle - Google Patents

Machine de pliage pour feuilles de tôle Download PDF

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Publication number
WO2009059582A2
WO2009059582A2 PCT/DE2008/001800 DE2008001800W WO2009059582A2 WO 2009059582 A2 WO2009059582 A2 WO 2009059582A2 DE 2008001800 W DE2008001800 W DE 2008001800W WO 2009059582 A2 WO2009059582 A2 WO 2009059582A2
Authority
WO
WIPO (PCT)
Prior art keywords
roller
bending machine
sheet
rollers
metal sheets
Prior art date
Application number
PCT/DE2008/001800
Other languages
German (de)
English (en)
Other versions
WO2009059582A3 (fr
Inventor
Bernd Berg
Original Assignee
Bergrohr Gmbh Siegen
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 Bergrohr Gmbh Siegen filed Critical Bergrohr Gmbh Siegen
Priority to DE112008003603T priority Critical patent/DE112008003603A5/de
Publication of WO2009059582A2 publication Critical patent/WO2009059582A2/fr
Publication of WO2009059582A3 publication Critical patent/WO2009059582A3/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
    • B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers

Definitions

  • the present invention relates to a bending machine for metal sheets (hereinafter also referred to as sheets), preferably for the production of - possibly also multi-layer pipes -, more preferably of steel pipes with large wall thicknesses.
  • this can be done on a two-roll bending machine (also called a two-roll rounding machine), where the surface of one of the rolls is designed to be pressure-elastic that as a result of the pressure-elastic material forms a depressed area, in which a deformation of the sheet takes place about the opposite pressure-rigid roller.
  • a two-roll bending machine also called a two-roll rounding machine
  • the pipe production can also be done by the classical three-wrench bending process (also called rounding) in a three-roll bending machine (also called three-worm rounding machine) with appropriate Wakenan instruct (see this and in particular to the corresponding Wakenan whatsoever of these machines such as Mathee, Gerhard, ljieger Encyclopedia of Technology, Vol. 9, Encyclopedia of Production Engineering and Machinery, L - Z, p. 212, reverse sp. Below to the keyword "rounds" to p.
  • Rolling dies are used in this manufacturing process.
  • it comes to the final formation of the tube when passing through fixedly mounted rollers, which - an inside in the not yet closed slotted tube (not yet closed pipe precursor) and an outside of the slotted pipe running - cause by their deliberately shaped contour the bend.
  • the inner roll is pressed with a sword through the still open longitudinal seam of the future pipe against the inner wall and thus indirectly against the external role acting as a die (see also Fig. Ia - Id).
  • this known, also known as roll bending process method known in the art has problems:
  • the roller dies never fit exactly, as each sheet in terms of wall thickness and yield strength of the other sheets and thus also of the theoretical design sizes, after which the shape of the Anbiegerollen is determined , deviates. As a result, the bending radius generated deviates more or less from the desired target value, which causes an increased calibration effort.
  • Damage to the welding bevel can also occur due to friction on the upper roller blades, as a result of which the precision, mechanically manufactured welding edge loses its uniformity, which can also frequently lead to problems with tack welding.
  • the so-called sheet metal edge pre-bending (also called roll forming, cf. Fig. 4), which is a free-form method in which a sheet metal edge protruding above a table is bent or profiled by means of rollers or rollers, is suitable here.
  • a bending machine for metal sheets with a machine frame, a roller assembly with rotatably mounted in the machine frame rollers for rounding the Metal sheet having at least one respective top and bottom roll, which is the storage of the top roll or top rolls and the storage of the bottom roll or bottom rolls over the longitudinal extent of the respective roll at least in a common region of top roll or top rolls and bottom roll or bottom rolls executed, said Maschi ⁇ engerüst the bending machine in the working and insertion area of the metal sheet seen in cross-section to the rollers is designed in approximately C-shaped and according to the invention is characterized in that the open working area for the sheet metal plate in the interior of the, CY (interior or interior of, Cs *) only a rounding of the sheet (and not a complete rounding to a pipe) allowed.
  • the metal sheets are preferably those made of steel.
  • thick-walled sheets preferably those with thicknesses from or about 25 mm, particularly preferably from or more than 40 mm plate thickness continuously grooving with rollers that need only have a low bending stiffness and, accordingly, also a small diameter, preferably one which is less than or equal to 200 mm.
  • the above statements relate preferably to sheets of steel. This is made possible by the C-shaped design of the machine frame, which on the one hand opens the possibility to support the rollers against each other in this way, so supporting the forces acting on the rollers scavenging, and to initiate the forces in the machine frame. On the other hand, the open area between the ends of the 'Cs' gives the opportunity to insert the sheet to be bent for processing.
  • the machining of the sheet which in the present invention consists in only rounding the sheet and not in complete rounding to form a pipe, is ensured by the open work area for the metal sheet to be contacted inside the CY. A complete rounding is not possible in.
  • This bending machine according to the invention since the metal sheet must not touch the walls of the C-shaped interior to avoid even the slightest pinching of the edges.
  • the sheet metal plates to be processed and grooved in this bending machine can be thick-walled, preferably with thicknesses above or above 25 mm, particularly preferably above or above 40 mm.
  • the 'C-geometry' of the machine frame in the insertion and working area of the sheet is low in terms of intercepting high forces.
  • the design of the bending machine according to the present invention is preferably chosen so that the forces are C-shaped passed around the sheet metal edge to be deformed.
  • the forces to be used for rounding the thick-walled metal sheets can be so great that the force-absorbing elements are preferably connected to the particularly stable and solid machine frame of the bending machine.
  • the present invention is characterized in that in the molding of a metal sheet to a pipe by means of the bending machine as a result of the abutment of a sheet edge occurring (which is to be avoided) to the bending machine in the approximately C-shaped interior designed (always) Part of the metal sheet remains, the curvature, preferably significantly different from that which sets at the desired Rohradius.
  • the respective edge length of the metal sheet specifies the pipe circumference. From the pipe circumference can then be calculated pipe diameter, pipe radius and the curvature. The curvature of the metal sheet in the bending direction would be in a molding to a completely self-contained, circular tube at all Set constant and can be specified by the sweeping radius. This value (curvature value) is possibly reached at the ends of the sheet metal plate when rounding the metal sheet, but is by no means present on the entire metal sheet.
  • the storage of the upper roll or upper rolls and the storage of the lower roll or lower rolls is performed substantially over the entire longitudinal extent of the respective roller, whereby the machine can be used in its entire width for bending even thick sheets.
  • the storage of the top and bottom rollers (s) may be included with respective pins at the end of the respective roller.
  • the storage of the upper roll or upper rolls and / or the storage of the lower roll or lower rolls - preferably substantially over the entire longitudinal extent of the respective roll - by means of - preferably each - a rolling bearing, preferably a support roller or a support roller executed, which is preferably shorter than is the roll to be supported by it and which is preferably in (about) in the middle of the longitudinal extent of the roll to be supported.
  • the storage takes place when it is carried out over substantially the entire longitudinal extent of the respective roller both by means of their own pin of the respective to be supported roller (such as top or bottom roller [n]) and the support roller and thus then substantially over its entire longitudinal extent.
  • the storage of the upper roll or upper rolls and / or the storage of the lower roll or lower rolls - preferably substantially over the entire longitudinal extent of the respective roll - by means of - preferably each - a plurality of rolling bearings, preferably support rollers or support rollers be executed, each shorter as the roll to be supported by them and, taken as a whole, in longitudinal extension of the distribute the roller.
  • the storage is preferably carried out when it is carried out over the entire longitudinal extent of the respective roller substantially both by means of the own pin of the respective to be supported roller (such as top or bottom roller [n]) and the support roller and thus also here then essentially over its entire longitudinal extent.
  • Back-up rolls that rotate themselves or support rollers, such as ball bearings or roller bearings, which sit on a fixed non-rotating axis, are - as stated above - the preferred rolling bearings, with their help, the storage of the upper roll or upper rolls or the storage of the lower roll or lower rollers.
  • the rolling bearings preferably between individual support rollers or support rollers - or at the end of this is then the support of the bearings themselves and the introduction of forces into the machine frame on the variety of support points.
  • not less than 20 rolling bearings are selected with a corresponding number of supports on the machine frame.
  • support rollers are used to support the upper roller 30 and support the lower roller 24 in two rows next to each other, thus supporting the upper roller 60 and supporting each lower roller 48; this with a length of the rolls to be supported [top or bottom roll (s), ie the work roll (s)] of about 12 meters. Since the back-up rolls are generally slow to rotate, their static load-bearing capacity rather than their dynamic load-bearing capacity can be taken as a basis for obtaining as many support points as possible for a given diameter of the back-up rolls.
  • the number of support points can be increased even more.
  • the materials for supporting the upper and lower rollers are designed rigid.
  • This embodiment causes the top and bottom rollers supported by the beigeesteifen materials preferably support rollers or support rollers, against each other about their entire axis exert approximately the same force on the metal sheet.
  • Rolls in particular rolls of long rolls, bend under the action of pressure, depending on the respective roll material, to varying degrees. This in turn leads to a non-uniform exercise of the pressure on the metal sheet and so - seen over the length - not to a uniform shape.
  • the bending stiffness represents the relationship between the deflection and the applied load along a path.
  • the bending stiffness EI is composed of the elastic modulus E of the material and the area moment of inertia I of the geometrically given cross section.
  • the material is such that the deflection of the rolls under the load of the rounding process is less than 10 mm. So the deviation of the longitudinal axis of the respective roller, upper or lower roller, from the ideal line of the roller axis is not more than 10 mm.
  • the ideal line of the roll axis is a straight line which runs along the longitudinal axis in the center of the roll.
  • the roll arrangement for rounding the sheet bar preferably corresponds to the roll arrangement of a two-roll round machine (also called a two-roll bending machine or a two-roll bending roll) or a three-roll round mill (also called a three-roll bending machine or a three-roll bending roll).
  • a two-roll round machine also called a two-roll bending machine or a two-roll bending roll
  • a three-roll round mill also called a three-roll bending machine or a three-roll bending roll
  • one or more actuators may be provided, the or the upper roller or the upper rollers. on the one hand and the lower roll or the lower rolls on the other hand able to deliver relative to each other.
  • these can be distributed over the longitudinal extent of the respective roller (for example a work roll) or the roller arrangement so as to be able to counteract any remaining residual deflections of the respective roller or roller arrangement in a targeted manner - individually or in groups.
  • the actuator or the actuators can be arranged on the upper roll side as well as on the lower roll side or also on the upper and lower roll side and are preferably designed as a hydraulic actuator, particularly preferably as a hydraulic cylinder.
  • the actuator or the actuators may be arranged so that he or she the upper roll or the upper rolls via a functioning as a lever, rotatably mounted machine frame part relative to the lower roll or the lower rolls or the lower roll or the lower rolls against the upper roll or the upper rolls be able or able to supply.
  • a hydraulic actuator preferably a hydraulic cylinder as SteEantrieb, this embodiment of the present invention is particularly preferred.
  • the advantages of round machines also called bending rollers or roll bending machine
  • ie in particular the possibility of crushing free-form processing of a sheet also used for the rounding of the sheet, especially in the sheet edge region and in particular for larger sheet thicknesses become.
  • the rounded with the bending machine according to the invention plate can then be formed in a further forming machine to the tube and usually so that at the end of the tube forming process no Endformung the plate edges longer required, as this already with the bending machine in the way of the sheet edges beveling preforming is done.
  • 3a-3e show a pressing die for preforming according to the prior art with a press ram and a solid die in cross-section in various steps of a Vorformungsbacters,
  • FIG. 5 is a perspective overview of a preferred embodiment of a bending machine according to the present invention.
  • FIG. 6 is a front view of the bending machine according to the invention of FIG. 5,
  • FIG. 7 shows a cross section of the bending die according to the invention according to FIGS. 5 and 6 along the axis L-L from FIG. 6, FIG.
  • FIGS. 5 and 6 are side views of the bending machine according to the invention according to FIGS. 5 and 6,
  • FIG. 9 shows a cross section of the bending machine according to the invention according to FIGS. 5 and 6 along the axis K - K from FIG. 6
  • FIG. 10 is an overview view of another preferred embodiment of a bending machine according to the present invention in cross-section
  • FIG. 11 shows an embodiment of a bearing - here the upper roller - according to the present invention
  • Fig. 12 shows a particularly preferred embodiment of a storage - liier the
  • FIG. 13 shows a further preferred embodiment of a storage - Her the top roller - according to the present invention.
  • FIG. 1a-1d show a roll forming device for post-forming according to the prior art with a roll 1 shown on one side in cross-section in different steps of a post-forming process.
  • Figures 3a-3e show a prior art preform press die apparatus having a ram 8 and a fixed die 4 in cross-section in different process slides of a preforming process.
  • the sheet forming the future tube 3 is pressed in approximately even state by means of the press ram 8 in the die 4 and thus receives in the direction of the sheet edges 2 a rounding. After this, the sheet can then be finally formed into a tube, preferably by the UO method.
  • Fig. 4 shows an apparatus for Walzpro divetechnik of sheet edges in free-form process (also called Blechkantenvorbiegen) in cross section.
  • free-form process also called Blechkantenvorbiegen
  • FIG. 5 shows a perspective overview of a preferred embodiment of a bending machine U according to the present invention.
  • FIG. 6 shows a front view of the bending machine 11 according to the invention according to FIG. 5 from the side of the sheet metal inlet with markings of the axes of intersection of the axes L - L and K - K, to which reference is now made in the following FIGS.
  • Fig. 7 shows a cross section of the bending machine according to the invention according to Fig. 5 and 6 along the axis L - L of Fig. 6 and that here, C shown open to the left.
  • a roller assembly 13 with rotatably mounted in the machine frame rollers 13o, 13ul, 13ur for rounding the metal sheet 3 by means of at least one top roller 13o and one - seen in the viewing direction in cross-section - left bottom roller 13ul and a right lower roller 13ur, wherein the support of the upper roller 13o and the support of the lower rollers 13uf, 13ul are carried out substantially over the entire longitudinal extent of the respective roller 13o, 13ul, 13ur.
  • this storage takes place via a plurality of support rollers 10o, 10u along the roller 13o, 13ul, 13ur to be supported, which remove the forces from the roller 13o, 13ul, 13uf to be supported and introduce them into the machine frame 12 at a plurality of locations.
  • this is done by upper support rollers 10o and lower support rollers 10u, which in turn are mounted in the machine frame 12.
  • An embodiment of the bearing according to the present invention can also be taken from the following description in FIGS. 11, 12 and 13 here.
  • the roller assembly 13 for rounding the metal sheet 3, which later forms the slit pipe and after welding the longitudinal edges of the finished tube corresponds to the roller assembly 13 for rounding the metal sheet 3, which later forms the slit pipe and after welding the longitudinal edges of the finished tube, the roller assembly of a three-roll rounding machine.
  • the machine frame 12 of the bending machine is designed in the working and insertion region 14 of the metal sheet 3 in cross-section to the rollers in an approximately C-shaped configuration.
  • the actuators 15 are arranged so that they are able to deliver the top roller 13o via a lever, rotatably mounted machine frame part 16 relative to the bottom rollers 13ul, 13ur.
  • the rotatable mounting 17 is here by means of a joint approximately in the middle of the machine - seen in cross section - executed.
  • FIG. 8 shows a side view of the bending machine according to the invention according to FIGS. 5 and 6.
  • the use of the reference numbers here corresponds to that of FIG. 7 here, that shown C open to the right.
  • 9 shows a cross-section of the bending machine U according to the invention according to FIGS. 5 and 6 along the axis K-K from FIG. 6 here, that C shown open to the right
  • Fig. 10 shows an overview of a further preferred embodiment of a bending machine according to the present invention in cross-section here that, C shown open to the right.
  • this bearing also takes place in this embodiment according to the present invention via back-up rolls, namely upper back-up rolls 10 o and lower back-up rolls 10 u, which in turn are themselves mounted in the machine frame 12.
  • roller assembly 13 for rounding the metal sheet 3 corresponds to the roller assembly of a three-roll rounding machine.
  • a hydraulic cylinder is also provided here, and indeed one such, the upper roller side arranged the upper roller can deliver relative to the lower rollers.
  • Fig. 10 shows, as well as Figs. 5 to 9, the stability of the machine frame, which must be designed to accommodate the forces occurring during the bending process.
  • the upper roller 13o and the upper rollers and the lower rollers 13ul, 13ur connected via their storage directly to the machine frame.
  • Fig. U shows an embodiment of a storage - here the top roller 13o - according to the present invention.
  • the storage of the upper roller 13 (shown here only by way of example for a top roller, so also usable for several top rollers or storage of the bottom roller or bottom rollers) takes place here according to the invention over the entire longitudinal extent of the respective top roller 13o and that with the aid of a support roller 10o, which is shorter than is to be supported by her top roller 13o, and here is approximately in the center of the roller to be supported 13o.
  • the support roller 10o is itself supported by its pins 18 at the respective end of the roll by means of supports 19 in the machine frame 12.
  • the upper roller bearing over the entire longitudinal extent is done here so by means of the own pin of the upper roller 20 and the support roller 1Oo and thus substantially over its entire longitudinal extent.
  • Fig. 12 shows a particularly preferred embodiment of a storage - here the top roller 13o - according to the present invention.
  • the storage of the upper roller 13o (also shown here only as an example for a top roller, so also usable for several top rollers or storage of the bottom roller or bottom rollers) takes place here according to the invention over the entire longitudinal extent of the respective top roller 13o and that with the help of a variety - here thirty Struck - Of back-up rollers 10o, which are arranged here in two rows and each shorter than the top roller to be supported by them 13o.
  • the back-up rolls 10o are distributed in the direction of the longitudinal extent of the upper roll 13o to be supported and guide the forces removed by the upper roll 13o at a multiplicity of locations - here on the left and right of the respective back-up rolls 10o-via the pins of the back-up rolls 10o and 10a associated supports 19 in the machine frame 12 a.
  • Fig. 13 shows a further preferred embodiment of a storage - here the top roller 13o - according to the present invention by means of support rollers instead of support rollers and here by means of ball bearings 10o, which are arranged on a rigid axle 21, which between the ball bearings 1Oo by means of supports 19 on the machine frame 12 is attached. Again, be here the forces taken off from the upper roll 13o are introduced into the machine frame 12 via the supports 19.

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

Abstract

Machine de pliage (11) pour feuilles de tôle (3) comprenant un bâti de machine (12) qui présente un système de cylindres (13) comportant des cylindres (13o, 13ul, 13ur) montés rotatifs dans le bâti de machine (12) pour cintrer les feuilles de tôle (3) au moyen, respectivement, de cylindres supérieurs et de cylindres inférieurs (130, 13ul, 13ur). Le positionnement du/ ou des cylindre(s) supérieurs (13o), et le positionnement du/ ou des cylindre(s) inférieurs (13ul, 13ur), vu sur l'extension longitudinale des cylindres respectifs (13o, 13ul, 13ur), s'effectuent au moins dans un domaine commun du cylindre supérieur (130) ou des cylindres supérieurs et du cylindre inférieur ou des cylindres inférieurs (13ul, 13ur), le bâti de machine (12) de la machine de pliage (11) dans la zone de travail et d'introduction (14) des feuilles de tôle (3) étant sensiblement en forme de 'C', vu en coupe longitudinale par rapport aux cylindres (13o, 13ul, 13ur). L'invention est caractérisée en ce que la zone de travail ouverte pour les feuilles de tôle à cintrer permet, à l'intérieur du 'C', uniquement un cintrage de la tôle.
PCT/DE2008/001800 2007-11-05 2008-11-04 Machine de pliage pour feuilles de tôle WO2009059582A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112008003603T DE112008003603A5 (de) 2007-11-05 2008-11-04 Biegemaschine für Blechtafeln

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007053003 2007-11-05
DE102007053003.1 2007-11-05

Publications (2)

Publication Number Publication Date
WO2009059582A2 true WO2009059582A2 (fr) 2009-05-14
WO2009059582A3 WO2009059582A3 (fr) 2009-09-17

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Application Number Title Priority Date Filing Date
PCT/DE2008/001800 WO2009059582A2 (fr) 2007-11-05 2008-11-04 Machine de pliage pour feuilles de tôle

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DE (2) DE112008003603A5 (fr)
WO (1) WO2009059582A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8117882B2 (en) 2004-12-21 2012-02-21 Bergrohr Gmbh Siegen Multi-layer pipe and method for its manufacture

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016105838A1 (de) * 2016-03-31 2017-10-05 Haeusler Holding Ag Vorrichtung und Verfahren zum Nachbiegen eines vorgeformten Rohres

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056962A (en) * 1976-08-13 1977-11-08 Edeco-West, Inc. Rolling machine assembly
DE3443851A1 (de) * 1984-11-30 1986-06-05 Kazanskij aviacionnyj institut imeni A. N. Tupoleva, Kazan' Zweiwalzen-blechbiegemaschine
CH688437A5 (de) * 1990-04-12 1997-09-30 Haeusler Ag Chr Zum Zylindrisch-Biegen einer Platte dienende Umformmaschine.
DE19750815A1 (de) * 1997-11-17 1999-05-20 Schloemann Siemag Ag Biegevorrichtung für ein Metallband

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE334760T1 (de) 2000-10-12 2006-08-15 Elpatronic Ag Zweiwalzen-rundmaschine sowie verfahren zum runden von blechen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056962A (en) * 1976-08-13 1977-11-08 Edeco-West, Inc. Rolling machine assembly
DE3443851A1 (de) * 1984-11-30 1986-06-05 Kazanskij aviacionnyj institut imeni A. N. Tupoleva, Kazan' Zweiwalzen-blechbiegemaschine
CH688437A5 (de) * 1990-04-12 1997-09-30 Haeusler Ag Chr Zum Zylindrisch-Biegen einer Platte dienende Umformmaschine.
DE19750815A1 (de) * 1997-11-17 1999-05-20 Schloemann Siemag Ag Biegevorrichtung für ein Metallband

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8117882B2 (en) 2004-12-21 2012-02-21 Bergrohr Gmbh Siegen Multi-layer pipe and method for its manufacture

Also Published As

Publication number Publication date
DE112008003603A5 (de) 2010-10-14
DE102008055780A1 (de) 2009-05-07
WO2009059582A3 (fr) 2009-09-17

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