EP0296317B1 - Procédé et dispositif pour cintrer une tôle - Google Patents

Procédé et dispositif pour cintrer une tôle Download PDF

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Publication number
EP0296317B1
EP0296317B1 EP88105145A EP88105145A EP0296317B1 EP 0296317 B1 EP0296317 B1 EP 0296317B1 EP 88105145 A EP88105145 A EP 88105145A EP 88105145 A EP88105145 A EP 88105145A EP 0296317 B1 EP0296317 B1 EP 0296317B1
Authority
EP
European Patent Office
Prior art keywords
pressure
rollers
bending
beads
flanges
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.)
Expired - Lifetime
Application number
EP88105145A
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German (de)
English (en)
Other versions
EP0296317A3 (en
EP0296317A2 (fr
Inventor
Walter E. Dipl.-Ing. Späth
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.)
Spath & Co KG Stahlbau-Biegetechnik GmbH
Original Assignee
Spath & Co KG Stahlbau-Biegetechnik GmbH
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Publication date
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Priority to AT88105145T priority Critical patent/ATE90011T1/de
Publication of EP0296317A2 publication Critical patent/EP0296317A2/fr
Publication of EP0296317A3 publication Critical patent/EP0296317A3/de
Application granted granted Critical
Publication of EP0296317B1 publication Critical patent/EP0296317B1/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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/08—Bending rods, profiles, or tubes by passing between rollers or through a curved die
    • 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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/08—Bending by altering the thickness of part of the cross-section of the work
    • 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
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers

Definitions

  • the invention relates to the arcuate bending of a sheet according to the preamble of claim 1.
  • the application of the invention relates to very large, thin-walled, possibly already pre-profiled sheets or to finished profiles, beads in the web area and complicated shapes on the flange parts are provided, or also difficult to bend pre-profiled sheets or profiles made of tough material with a large cross-section.
  • the sheets and profiles should have an arcuate bend in the support plane and in the flange area in the manner of a deformation by stretching on one side.
  • pre-bent metal sheets should additionally be given a curvature out of the support plane and a cone-like curvature should be given.
  • the application of the invention relates in particular to elongated aluminum profiles, which are initially unbent rail-like and consist of a central web with laterally angled flanges, with semi-circular beads pointing outwards from the manufacturer at the ends of the flanges.
  • the beads are circular in cross-section on one side of a flange, smaller than a spherical bead, and on the other flange a larger semi-circular bead is formed in cross-section, pointing outward in the manner of a hook.
  • Such elongated profiles are used to be hooked together, i. H. the larger hook-shaped bead engages over the smaller bead of the profile strand, so that such profile strands can be placed side by side in any width.
  • the larger hook-shaped bead is then crimped over the smaller bead, which creates larger contiguous profiled surfaces in a permanent connection to z. B. roofs or the like.
  • the profile parts can still be hooked and flanged together on the originally intended flanges and the lateral beads even after bending in any complicated geometric shapes.
  • the profiled rails are also curved in the vertical direction, so that the rails additionally have a concave or convex course without the other previous profiling, in particular also beads, being affected.
  • the previously rectilinear and then circularly bent rail is now additionally bent in the vertical direction in an upward or downward direction, so that the curved rail additionally has a concave or convex shape.
  • a profile rail which has already been bent under supervision and which additionally has a concave or convex profile can also be given a cone-shaped bend in the manner of a curve elevation.
  • Any geometric shapes, in particular roofs, can thus be reproduced for covering without the original profiling, which is provided as stiffening and / or for interlocking, being lost.
  • a rail-like profile with a web area and two lateral flanges, if necessary with beads, is then bent under supervision from above without interfering with the bead area, namely by applying an increasing pressing force to the center bar and by rolling out a side flange , whereby any pre-profiles or beads are not additionally rolled out.
  • Such an arcuate profile is additionally given a convex or concave curvature by roll bending or core roll bending machines with superimposed press rolls, the beads not being specially rolled out.
  • Another solution provides for the curvature of a rail-like profile also to be superimposed on the bead area with pressing pressure in order to achieve convex or concave curvatures, the beads being initially only partially or completely bent up and later being bent back into the original shape.
  • the arcuate beads can also be rolled out very well without them being deformed or torn.
  • an arcuate and additionally concave or convex profile part can then additionally be conically deformed.
  • the object of the invention is to provide a method which enables the bending of thin-walled and large-volume profiles and sheets, bulging or tearing of the sheet should be avoided and an original pre-profiling should be obtained and a dimensionally stable, curved profile part should be created, this Bending should be integrated into parts of an existing roll bending device.
  • a rail-like profile initially running in a straight line, possibly with complicated profiles on the flanges, is bent in the support plane, that is to say in the form of an arc when viewed from above, as a result of the features mentioned.
  • the invention now prevents the resulting upsetting forces by the pressure distribution in the web area of the sheet and by rolling out the flange, so that a balanced force curve is created in the sheet metal part, d. H. a new neutral line is created from which the pressing force is applied.
  • the invention uses a controlled thinning and thus an extension through controlled rolling processes, with smaller emerging compression forces being distributed beneath the newly formed bending line to an innocuous extent in the profile areas of the sheet.
  • the pressure profile of the two horizontally opposite press rollers can be provided linearly for arcuate bends. This results in a shift of compression forces, in particular on the compression side of the sheet, in sheet metal areas, the result being a stress-free profile part.
  • the pre-curved profile part can also be detected and rolled out further, especially in the case of unstable and relatively weakly dimensioned profile parts. This can also be repeated.
  • the rolling out of the flange area of the sheet metal with two lateral pressure rollers can precede the rolling out of the web area, or can be connected in between.
  • the plate is carefully pre-stretched in its flange area with a force distribution that is favorable for the subsequent rolling process of the contact surface of the plate.
  • lateral pressure rollers can also be arranged in series. Also in later process steps, e.g. B. after partial rolling of the web of the sheet, one or more pairs of lateral press rolls can be arranged.
  • the sheet or the profile part in particular a Z-shaped profiled sheet metal part, can be arranged in its web and flange area between two horizontal press rolls in the manner of a four-roll bending machine, according to the invention starting from the lower, middle roll, a relatively large pressing force in the vertical direction against the For this purpose, the upper roll is exerted, whereby the otherwise known roll bending is combined with roll bending.
  • the method is based on a four-roll bending machine known per se.
  • the sheet is guided in a known manner between two middle guide rollers and curved on the left and right, lower rollers symmetrically provided for this purpose, which are arranged offset in height.
  • the middle guide rollers only serve to generate a certain frictional force in order to convey and guide the sheet.
  • the invention now provides a completely new pressing force on the lower middle roll in the vertical direction against the roll lying opposite in the vertical direction, which surprisingly results in considerable technical advantages over roll bending.
  • the lower middle roll presses upward with a vertical pressing force.
  • two or more press rolls are overlaid with vibrations.
  • tough, solid material is advantageously deformed.
  • the vibration generates beats of a certain frequency, which, with the support of the press rolls, causes the sheet metal to deform more effectively.
  • the vibrations can be provided on the upper horizontal press roller on the maximum press pressure side. In this case, there is an advantageous stress-free distribution of stretching and compression forces in the desired partial areas of the sheet.
  • One or more side press rolls can also be overlaid with vibrations. This also supports the effect of the side press rollers during the rolling process.
  • a device for carrying out the method according to claim 14.
  • press rolls with which the appropriate pressure distribution in the rolling area of the sheet according to. the procedure is carried out.
  • the result is a rolling process that can be adjusted both symmetrically and asymmetrically in order to achieve radii of different strengths through this adjustment.
  • the web of the sheet and its outer flange area on the long side of the profile do justice to this.
  • the outward-facing beads of the flanges are also bent in the course of the bending of the web and flange area, so that there is a risk that the beads can only imperfectly follow the other turns, in particular turns of the web area.
  • the beads are now rolled out according to the profile, without losing the original fit that is necessary to get the profile parts hooked after bending.
  • horizontal press rolls in the web area and lateral press rolls on the flanges are provided in upstream or downstream in order to bend the sheet in an arc, and for bending are carried out in upstream or downstream bending stations the almost circular beads formed on the profile from the outset either partially semicircular or completely in a straight line and overlaid with pressing forces.
  • the beads are then deformed back into the original shape.
  • the beads are partially bent in a semicircular shape and that for the concave curvature of the sheet on the flanges on the left and right, starting from the beads and on the beads themselves, linearly increasing pressing forces are provided in the outer and inner areas and that linearly increasing arc-shaped pressing forces are applied in the transition to the web area and a uniform roller pressure is subsequently applied to the center web.
  • a linearly increasing pressing force is formed in the web area in the direction of the bend and that linearly increasing, arc-shaped pressing forces are provided at the transition areas to the flanges and that the flanges are directed in the direction attack linearly falling pressing forces towards the beads.
  • a profiled sheet 5 is shown with a web area 11 and side flanges 9,10.
  • the first step is to bend the profiled sheet 5 according to a radius 33 according to FIG.
  • a distribution of forces depending on the dimensions of the sheet is plotted over the profiled sheet 5.
  • the dashed line of forces shows stress fields in the area of the profile, which were achieved with the known bending processes.
  • a counterforce 34 in the manner of a distribution of forces is now applied to the vertical leg 9 of FIG. 1 to indicate that a counterforce 34 acts from the outside in the direction of the central longitudinal axis in the region of the entire vertical leg 9, which acts from the inside of the leg 9 there is an equal force distribution - acting towards the outside.
  • the hatched rectangle with the counterforce 34 symbolizes that the same force acts on the vertical leg 9 from the outside as from the inside in order to avoid an inadmissible deformation of this vertical leg 9.
  • a maximum pressing pressure is applied by horizontal pressing rollers, which preferably merges linearly into an unpressurized area in position 17 on the other side of the plate 5.
  • the lateral flange region 9 of the sheet metal 5 is replaced by lateral ones according to the greatest radius of curvature Rolled out press rolls.
  • the sheet 5 can also be exposed to this course of forces in repeated passes.
  • the beads 52 are not rolled out in this process, but are only bent in the course of the entire deformation of the sheet 5.
  • press-roll bending process prevents the thin sheet-metal profile 5 from bulging and, as a result, achieves a stably curved molded part.
  • the bending or rolling process can be repeated both on the web 11 of the sheet 5 itself and on the flange area 9 of the sheet 5 with different pressing forces.
  • the method according to the invention is particularly well suited for upstream or downstream connection in known core roll bending machines or three-roll bending machines, where the sheet is additionally curved in the vertical direction, since the invention additionally achieves pre- or post-processing of the sheet 5, which results in a stable, wave-free curvature leads.
  • the pressing pressure is superimposed with a vibration.
  • the rolling pressure in the flange area 9 of the sheet 5 can also be superimposed with vibrations in order to support the stretching process in the form of adjustable frequency beats.
  • the sheet 5 is shown with its web 11 and the flanges 9 and 10 in the pressing position between two horizontal press rollers 4 and 6, the maximum pressing pressure being present in position 18, which is linear up to a depressurized state in position 17 in the region of Sheet 5 runs.
  • a maximum pressing pressure corresponding to a desired extension is generated by the lateral pressing rollers 19, 21 in the region of the flange 9.
  • the pressure rollers 19, 21 on the flange side 10 of the sheet 5 run without pressure, so that the profile is bent in a circle.
  • the horizontal press rollers 6 have profiles, in particular annular grooves 7, so that pre-profiled beads 8 in the region of the web 11 are not damaged when they are rolled out.
  • Profiles are also provided on the lateral pressure rollers 19, 21 in order to be able to carry out the rolling process in the flange regions 9 and 10 without damaging existing beads 52.
  • the lateral pressure roller 21 is provided horizontally displaceable, the flange forming pressure acting in the direction of arrow 22.
  • the press roller 21 is mounted on an arm 23 according to FIGS. 2 and 3, to which the spindle pressure from a spindle, not shown here, is applied in the direction of the arrow 24.
  • Figure 3 shows the bearing arrangement of the horizontal press rollers 4,6 from the side.
  • the plate 5 is located between the two horizontal press rolls 4 and 6, which have the maximum press pressure in position 18.
  • the bearings 15 are slidably mounted in guides 32, the spindle pressure acting in the direction of arrow 29 via the pressure rollers 14 on the shaft end 12 of the upper horizontal press roller 6 and the Pressing pressure generated.
  • the lower horizontal press roll 4 is immovably arranged only rotatably and takes up the press pressure via the press rolls 1.
  • FIG. 4 shows an arrangement of the horizontal and lateral rolling process, the sheet metal 5 first passing two horizontal press rollers 4, 6 in the direction of the arrow 30 via a motor drive with a drive chain 27, which are followed by a deformation of the flange area by means of the lateral press rollers 21.
  • FIG. 4 shows the side of the sheet 5 with the web 10, which according to FIG. 1 has a largely pressure-free course with the position 17.
  • the roller 21 is used here in connection with pressure-free ends of the horizontal press rolls 4, 6 only for guiding the sheet 5.
  • the device is created in a symmetrical arrangement. Depending on the desired curvature of the sheet 5, pressure increases can also be provided in the otherwise depressurized areas of the device. With the curvatures to be expected, the press rolls 4, 6 are arranged offset according to the course of the curvature.
  • FIG. 4 three different forming processes are connected in series, namely by means of the first bending station which lies at the front in the direction of arrow 30, the web 11 is first rolled and slightly curved.
  • the forming process then closes Flange areas on by the central arrangement of the laterally acting press rolls 21 and then the actual finish press rolling takes place through the station connected in the direction of arrow 30, where the horizontally mounted rolls 4, 6 are also opposite one another.
  • any other embodiments are also possible. In this way, more than two forming stations can be used for the web or several flange forming stations.
  • the spindle drives 31 can be seen, which generate the vertical pressing pressure via the vertically displaceable press rollers 6.
  • lateral pressure rollers 21 are provided on an arm 23, on which the spindle pressure acts in the direction of the arrow 24.
  • vibrations can be provided on the arm 23 in the direction of the arrow 24 and in the region of the spindle drive 31 on the horizontal press rollers 6 with adjustable frequency.
  • FIG. 5 shows a four-roll bending machine known per se, in which the profiled sheet metal part 5 is guided between two middle rolls 35, 36 only via frictional forces. Two further rollers 37, 38 only serve to give the sheet metal part 5 a curvature according to a radius 39 in a manner known per se.
  • FIG. A Z-profile 41 is located between pressure rollers 35, 36, a relatively large pressing force 40 being applied in the vertical direction.
  • a neutral line 42 which is otherwise present during the roll bending process, shifts into an innocuous area in accordance with a resulting neutral line 43.
  • Bending forces 44, 45 which otherwise act are eliminated and, rather, a bending force 46 acting in the direction of the horizontal leg is created, as a result of which harmful deformations are avoided.
  • the leg 47 could bend in an arc at an angle according to the force 45, which is now avoided since the stretching process results in uniform stretching, which compensates for deformations. Rather, a uniform tension is achieved over the entire horizontal leg 47.
  • the press-rolling process here provides for an artificial stretching of the web or of the horizontal leg 47, so that, as it were, an artificial bending process occurs in which deformations are surprisingly avoided.
  • Roll rolling bending according to FIGS. 1 and 2 is continued here in such a way that a press roll according to FIGS. 5 and 6 is also integrated into this roll rolling bending, as a result of which press roll bending is produced.
  • the pressing force 40 extends uniformly over the entire length of the horizontal leg 47, which means that profiles 41 which are difficult to bend can now be bent.
  • FIG. 7 shows a profile part 5 with beads 52, which was bent according to radii 48, 49 in a roll-roll bending process according to FIG. 1.
  • Such profile parts 5 can have considerable dimensions and dimensions of several meters.
  • FIG. 8 shows the profile part in an end sectional view, it being evident that the profile with beads 52 is present in a profile that is relatively difficult to bend.
  • FIG. 9 shows radii 50, 51 which were given to the profile part 5 in an additional press rolling operation according to FIG. 5, 6. This means that large thin-walled sheets 5 or sheets of tough material that are difficult to bend can now be provided both with radii 48, 49 according to FIGS. 2, 3, 4 and 7 and with radii 50, 51 according to FIGS. 5, 6 and 9.
  • FIGS. 10 to 14 in conjunction with FIG. 16, it is explained how, in addition to a desired bending and curvature of the sheet 5 according to FIGS. 1 to 9, the beads 52 are also deformed according to the invention in order to achieve a desired fit and in addition the stability of the deformed sheet 5 to increase.
  • the beads 52 are rolled out from the inside and outside and partially bent up (drawn in with a solid line) or the beads 52 ′ are bent up completely (shown in dashed lines) in an upstream station according to FIG. 16, not shown.
  • the beads After bending and curving the bead area in connection with bending and curving the central web and the flanges according to FIGS. 1 to 9, the beads are formed in a circular or hook-shaped manner in the original shape, in particular avoiding deformation or tearing of the beads.
  • a profiled sheet 5 according to FIGS. 10 and 11 is created, where the profiled sheet 5 with the flanges and the beads 52 has a convex curvature with the radius 53 in the web area 11 or according to FIG. 11 has a concave curvature with the radius 54 and each additionally takes an arcuate course according to FIG. 7.
  • the curvatures 53, 54 are achieved with a roll bending process, on which a press-rolling process is superimposed, on the central web 11 according to FIG. 5, the flanges 9 and 10 with lateral press rolls 19, 21 according to FIG. 2 also being rolled out in the manner of a press roll rolling bending process and additionally 16, the beads 52 in connection with roller pairs 69, 71 are placed under pressing pressure, as a result of which overall pressure profiles of the pressing forces according to FIGS. 13 and 14 are produced.
  • FIGS. 10A, 11A each show the cross section of the profile. It is essential here that there is a neutral bending axis 55, which runs largely stress-free.
  • FIGS. 12, 12A A further exemplary embodiment is shown in FIGS. 12, 12A, where the profile additionally has a conicity at an angle 78, that is to say that one flange 9 is higher than the other flange 10. If one looks at the profile according to FIG. 12 and FIG 12A is presented as a circular ring, this results in a cone that narrows towards the center.
  • FIGS. 13, 14 and FIG. 15 show the course of the pressing pressure of the roller pairs arranged one behind the other according to the devices according to FIGS. 4, 5, 6 and 16, when the previously linearly profiled sheet 5 passes through the pressing and Bending rolls are bent and curved without opening and closing stations for the beads 52 or other guide rollers being shown here.
  • the flanges 9, 10 are given a pressing force 57 which initially increases linearly from the center web 11, but which at point 58 at the level of the beads 52 changes into a non-linear pressing force 59 which extends to the apex 60 weakly rises to a maximum pressing force and then weakly falls again in the outer region of the bead 52 according to FIG. 13 at point 61.
  • FIG. 13 On the left hand side according to FIG. 13 there is a flange 10, a bead 52 and a web 11 shows a stress curve in order to curve the sheet metal 5 concavely according to FIG. 11, the same stress diagram applying to the flange 9 in mirror image.
  • a maximum pressing force 63 is first applied to the flanges 9, 10 by means of pressing rollers 19, 21, which drops linearly corresponding to the pressing force 65 to the zero point 64 of a zero line 66 on the bead 52.
  • an upward or downstream inclined pressing roller 19, 21 applies a pressing force 70 which increases slightly in a curved, linear manner in the region of curvature between the flanges 9, 10 and the central web 11.
  • an additional pressing force 40 is given to the central web 11 in the reverse bending direction in connection with a press roll bending process in order to concave the central web 11.
  • the beads 52 which according to FIG. 2 originally exist as a ball or hooked bead from the manufacturer's side, are slightly bent up as shown in FIG. 16.
  • roller pairs 69, 71 have profiles 72, 73, by means of which the tension profiles on the beads 52 according to FIG. 13 left or right part are achieved by pivoting and pressing.
  • roller pairs 69, 71 with intrinsically complicated profiles could, however, also be omitted.
  • lateral rollers (not shown here), for example according to the press rollers 19, 21 according to FIG. 2 with suitable profiling for flanging, flare the originally semicircular beads 52 in a straight line according to beads 52 'in the dashed representation according to FIG. 16.
  • the sheet 5 can now also be concavely or convexly curved according to FIG. 14.
  • a pressing force 74 which increases linearly from the central web 11, is applied to the flanges 9, 10 by means of lateral, non-profiled press rolls, for example according to the press rolls 19, 21 according to FIG. 2, in a station downstream of the flanging process. 10 and the beads 52 '.
  • the curvature profile of the pressing forces 34, 56 according to FIG. 13 and FIG. 14 is connected to an arcuate bending of the sheet metal 5 in a upstream or downstream bending and rolling station according to FIG. 4.
  • the partially bent bead 52 or the fully bent bead 52 ' is returned to the original shape in a closing station arranged at the end of the run - not shown here - approximately after Figure 15, bent back.
  • both shapes of the bead 52 either partially bent or completely bent have their advantages. From the illustration on the right in FIG. 13 it follows that if the bead 52 is not bent up particularly then a pressing force acts at the apex 60 which is smaller than the pressing force according to FIG. 14 at the end of the bead 52 ', i.e. So that after bending the beads relatively high pressing forces are applied, but profiled pairs of rollers 69, 71 are avoided.
  • the partial or complete bending of the beads 52 is carried out in a plurality of bending stations connected in series, pairs of rollers 60, 71 according to FIG. 16 being arranged such that e.g. In an upstream first bending station, the beads 52 are partially bent into the position of the bead according to FIG. 16 (solid lines), after which a pressing force 40 is then applied to the central web 11 in a further bending station, and overall a molded body according to FIGS. 10 or 11 is created and then the bead 52 is closed again with corresponding shaping rollers in a downstream third station, so that the bead 52 reaches its original shape.
  • FIG. 15 a pressure force diagram is used to explain how a conically shaped body according to FIG. 12 and FIG. 12A is produced.
  • FIG. 15 there are initially three bending radii 75, 76, 77 and the profile has a cone angle 78 with respect to the horizontal.
  • the bending curve of the beads 52 is not shown in FIG. 15 because there is a course according to FIG. 13.
  • a radius 77 is defined on the right bead 52, where a zero point 79 is present, from which the pressing force increases in the form of the linear curve 80 up to a vertex 81, which lies in the plane of the center leg 11 .
  • a pressing force corresponding to the arc curve 82 is provided, which extends to the point 83, which lies in the plane of the flange 9. It is now important that a certain pressing force 84 already exists here and that the pressing force 84 increases from position 83 in the form of the linear curve 85 to position 86, where the pressing force 87 is maximum.
  • the pressing force again follows the radius 76, i.e. it follows the arcuate pressing force 88 in order to then extend to the apex 89, which lies in the plane of the center leg 11.
  • radius 76 i.e. the largest radius
  • radius 75 a smaller deformation is necessary in accordance with the smaller radius, which results in the decrease in the pressing force in the form of the linear curve 91.
  • a profile By applying different pressing forces to the form rollers by using different form rollers, a profile can be brought into different geometrical positions.
  • beads or closed profile cross sections are partially or fully opened in order to carry out the press rolling process in order to to achieve a controlled deformation in this way and only then are the bent parts closed again in downstream stations, ie returned to its original form.
  • any geometric shapes for covering roofs or the like can be produced in a fixed connection.
  • This method can also be used to produce sheets with straight ends, depending on the arrangement of the press-roll bending rollers and the profiling roller systems with respect to one another.

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

Claims (20)

  1. Procédé pour le cintrage d'une tôle comportant une âme et des ailes latérales, notamment d'un profilé en aluminium mince extrudé ou d'une tôle en aluminium ou en acier mince déformée par rouleaux, selon lequel la tôle est cintrée sur un côté, sur une table d'alimentation, caractérisé en ce que la tôle (5) est laminée, dans la zone de son âme (11), entre deux rouleaux compresseurs horizontaux (4, 6), une pression de laminage maximale étant associée à un côté des rouleaux compresseurs (6) tandis que l'autre côté est sans pression, et la zone des ailes (9) de la tôle (5) située côté pression est laminée entre deux rouleaux compresseurs latéraux (19, 21) à la manière d'une déformation par rouleaux.
  2. Procédé selon la revendication 1, caractérisé en ce que la courbe de pression prévue pour les deux rouleaux compresseurs horizontaux (4, 6) est linéaire.
  3. Procédé selon la revendication 1, caractérisé en ce qu'il est prévu, à la suite de l'opération de cintrage, deux autres ou, par paires, plusieurs rouleaux compresseurs horizontaux (4, 6) présentant une pression maximale - éventuellement variable - sur la face de cintrage de la tôle (5) et une seconde face des rouleaux compresseurs sans pression.
  4. Procédé selon la revendication 3, caractérisé en ce que le laminage de la zone des ailes (9, 10) de la tôle (5) à l'aide de deux rouleaux compresseurs latéraux (19, 21) est prévu en amont ou en aval du laminage de la zone de l'âme (11), ou intercalé.
  5. Procédé selon la revendication 1, caractérisé en ce que des machines de cintrage sur mandrins ou des machines de cintrage à trois ou quatre rouleaux sont montées en amont ou en aval ou intégrées aux rouleaux compresseurs horizontaux (4, 6) et latéraux (19, 21).
  6. Procédé selon la revendication 1, caractérisé en ce que la tôle (5) ou l'élément profilé est disposé, dans la zone de son âme et de ses ailes, entre deux rouleaux horizontaux (35, 36) et, à la manière d'une machine de cintrage à quatre rouleaux, dans la zone de rouleaux de cintrage (37, 38), et en ce que, à partir du rouleau central inférieur (36), une force de compression (40) relativement grande est appliquée dans le sens vertical contre le rouleau situé au-dessus (35) (fig. 5, 6).
  7. Procédé selon les revendications 1 à 5, caractérisé en ce que des vibrations sont superposées aux deux rouleaux compresseurs horizontaux (4, 6, 35, 36).
  8. Procédé selon la revendication 6, caractérisé en ce que les vibrations agissant au niveau du rouleau compresseur horizontal supérieur (6) sont prévues du côté de la pression maximale
  9. Procédé selon les revendications 1 à 5, caractérisé en ce que des vibrations sont superposées à un rouleau compresseur latéral (21).
  10. Procédé selon les revendications 1 et 6, caractérisé en ce qu'il est prévu, au niveau des ailes, des rebords arrondis (52) qui sont en partie dépliés en demi-cercle, en ce que, pour une courbure convexe de la tôle au niveau des ailes (9, 10), il est prévu, à gauche et à droite, des forces de compression (57) augmentant linéairement, à partir de la zone de l'âme (11), et en ce que des forces de compression linéaires courbes (59) sont appliquées sur les rebords arrondis (52) (fig. 13).
  11. Procédé selon les revendications 1 et 6, caractérise en ce que des rebords arrondis (52) prévus au niveau des ailes sont partiellement dépliés en demi-cercle en ce que, pour une courbure concave de la tôle (5) au niveau des ailes (9, 10), il est prévu, à gauche et à droite, des forces de compression (65, 67, 68) augmentant linéairement, à partir des rebords arrondis (52) et au niveau de ceux-ci, dans les zones extérieure et intérieure, en ce que des forces de compressions courbes (70) augmentant linéairement sont appliquées dans la zone de transition avec la zone de l'âme (11), et en ce qu'une force de compression constante (40) est définie au niveau de la zone de l'âme (11) (fig. 13).
  12. Procédé selon les revendications 1 et 6, caractérisé en ce que, avant le cintrage latéral par les rouleaux compresseurs horizontaux, les rebords arrondis (52') prévus au niveau des ailes (9, 10) sont dépliés en ligne droite dans le prolongement de celles-ci, et en ce que, pour une courbure convexe ou concave de le tôle (5) au niveau des ailes (9, 10) et des rebords arrondis dépliés (52'), il est prévu, à gauche et à droite, dos forces de compression (74) augmentant ou diminuant linéairement, à partir de la zone de l'âme (11), associées à une force de compression constante (40) au niveau de la zone de l'âme (11) (fig. 14).
  13. Procédé selon les revendications 1 et 6, caractérisé en ce que, pour le cintrage conique d'une tôle (5), il est prévu, dans la zone de l'âme (11), dans le sens du cintrage, une force de compression (58) augmentant linéairement, en ce que des forces de compression courbes (82, 88) augmentant linéairement sont formées au niveau des zones de transition avec les ailes (9, 10), et en ce qu'il est prévu, au niveau des ailes (9, 10), des forces de compression (80, 91) diminuant linéairement dans le sens des rebords arrondis (52) prévus au niveau de celles-ci (fig. 15).
  14. Dispositif pour le cintrage d'une tôle, la tôle comportant une âme et des ailes latérales, notamment un profilé en aluminium mince extrudé ou une tôle en aluminium ou en acier mince déformée par rouleaux, la tôle étant cintrée suivant une courbure latérale en association avec une table d'alimentation à l'aide d'au moins une paire de rouleaux ccmpresseurs agissant sur les zones des ailes et définissant entre eux un écartement de rouleaux à travers lequel passe la tôle, caractérisé en ce qu'il est prévu, au niveau de la zone de l'âme (11) de la tôle (5), d'autres rouleaux compresseurs inférieurs fixes (4) agissant dans le sens vertical et, au-dessus de la zone de l'âme, des rouleaux compresseurs (6) mobiles verticalement vers le bas, étant précisé qu'au niveau de la zone de l'âme (11) de la tôle (5), il est prévu sur les rouleaux compresseurs (4, 6) une pression plus grande d'un côté par rapport à l'autre côté de la zone de l'âme' (11).
  15. Dispositif selon la revendication 14, caractérisé en ce que les rouleaux compresseurs horizontaux et latéraux (4, 6, 19, 21, 35, 36) présentent des profilages.
  16. Dispositif selon la revendication 14, caractérisé en ce que les rouleaux compresseurs horizontaux (6) présentent, à leurs extrémités d'arbre (12), des rouleaux presseurs (14) qui sont disposés dans un palier (15), mobiles verticalement par l'intermédiaire d'une commande à broche (31) (fig. 2).
  17. Dispositif selon la revendication 14, caractérisé en ce que les rouleaux compresseurs inférieurs (4) sont en appui, au niveau de leur circonférence, contre des rouleaux presseurs (1) (fig. 2).
  18. Dispositif selon la revendication 14, caractérisé en ce qu'un rouleau compresseur latéral (19) est disposé mobile en rotation, fixe, tandis que l'autre rouleau compresseur latéral (21) est prévu sur un bras (23) à commande à broche (fig. 2, 4).
  19. Dispositif selon la revendication 14, caractérisé en ce qu'il est prévu, dans la zone des rouleaux compresseurs horizontaux inférieurs (4), un entraînement par moteur comportant une chaîne d entraînement (27) (par exemple un entraînement cardan, un entraînement direct par moteur par l'intermédiaire d'une transmission, etc).
  20. Dispositif selon la revendication 14, caractérisé en ce que des paires de rouleaux de cintrage sont disposées derrière la paire de rouleaux compresseurs, pour un passage de la tôle (5) à cintrer, étant précisé qu'une ou deux paires de rouleaux sont disposées en amont de la paire de rouleaux compresseurs afin d'ouvrir les rebords arrondis (52) prévus au niveau des ailes, et en ce qu'il est prévu une ou deux paires de cylindres de cintrage dans la zone des ailes afin de laminer les rebords arrondis (52), une ou deux autres paires de cylindres compresseurs latéraux (19, 21) pour laminer les ailes (9, 10) et une ou plusieurs (trois autres) paires de rouleaux pour fermer les bords arrondis (52).
EP88105145A 1987-04-01 1988-03-30 Procédé et dispositif pour cintrer une tôle Expired - Lifetime EP0296317B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88105145T ATE90011T1 (de) 1987-04-01 1988-03-30 Verfahren und vorrichtung zum biegen eines bleches.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3710931 1987-04-01
DE3710931 1987-04-01
DE19873738566 DE3738566A1 (de) 1987-04-01 1987-11-13 Verfahren und vorrichtung zum biegen eines bleches
DE3738566 1987-11-17

Publications (3)

Publication Number Publication Date
EP0296317A2 EP0296317A2 (fr) 1988-12-28
EP0296317A3 EP0296317A3 (en) 1989-02-22
EP0296317B1 true EP0296317B1 (fr) 1993-06-02

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EP88105145A Expired - Lifetime EP0296317B1 (fr) 1987-04-01 1988-03-30 Procédé et dispositif pour cintrer une tôle

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US (1) US5253501A (fr)
EP (1) EP0296317B1 (fr)
DE (2) DE3738566A1 (fr)
ES (1) ES2041723T3 (fr)

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JP3407490B2 (ja) * 1994-08-31 2003-05-19 三菱電機株式会社 数値制御方法及びその装置
EP1138403A1 (fr) * 2000-03-31 2001-10-04 Corus Bausysteme GmbH Méthode et dispositif pour le cintrage des tôles avec deux brides opposées
US8794044B2 (en) * 2001-09-27 2014-08-05 Ortic 3D Ab Method of bending metal sheets and a bending apparatus
SE521864C2 (sv) * 2001-09-27 2003-12-16 Ortic Ab Krökverk och sätt att kröka takplåt
US6843092B2 (en) * 2001-10-19 2005-01-18 Crown-Pn L.L.C. Architectural panel arching device
US7310984B2 (en) * 2003-03-27 2007-12-25 Bluescope Steel Limited Forming apparatus for precambered metal sections
US7111487B2 (en) * 2003-10-22 2006-09-26 Agency For Science, Technology And Research Apparatus and method for forming curvature in sheet metal
DE102004003681A1 (de) * 2004-01-24 2005-08-11 Klingelnberg Ag Biegevorrichtung mit Pendelwalzrollen
US7287407B2 (en) * 2004-05-15 2007-10-30 Eastern Sheet Metal Device and method for forming a flanged ring
US7493685B2 (en) * 2004-10-29 2009-02-24 Robert Issagholian-Havai Method and apparatus for fabricating arcuate sheet metal components for HVAC duct systems
SE0500954L (sv) * 2005-04-28 2006-02-14 Ortic Ab Produktionslinje och sätt att forma profiler
WO2008024842A2 (fr) * 2006-08-24 2008-02-28 Ltc Roll & Engineering Co. appareil et procédé pour réduire les variations de profil dans des Tôles métalliques
DE102007047875A1 (de) * 2007-11-28 2009-06-04 Hilti Aktiengesellschaft Profil
JP5393580B2 (ja) * 2010-04-21 2014-01-22 本田技研工業株式会社 円弧状レールの製造方法
DE102010045954B4 (de) * 2010-09-21 2017-12-14 Armatec GmbH Verbundglaswalzenpresse
DE102011079095A1 (de) * 2011-07-13 2013-01-17 Hilti Aktiengesellschaft Verfahren zum Herstellen eines Profils aus einem Blechband
CN102787286B (zh) * 2012-07-17 2014-11-26 贵州航天电子科技有限公司 一种（2a12-t4）高强度铝合金薄壁异型腔体成型的方法
DE102014115661B4 (de) 2013-11-04 2022-11-03 Southco, Inc. Scharnier mit variabler Reibung
JP7210330B2 (ja) * 2019-03-01 2023-01-23 株式会社神戸製鋼所 アルミニウム合金部材
CN114700400A (zh) * 2022-05-07 2022-07-05 江苏春秋重型机械有限公司 一种具有上横梁辅助压制的卷板机及其卷制方法
CN117549541B (zh) * 2024-01-11 2024-03-19 金言实业集团有限公司 一种铝塑板折弯装置及其折弯方法

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Also Published As

Publication number Publication date
EP0296317A3 (en) 1989-02-22
DE3738566A1 (de) 1988-10-13
EP0296317A2 (fr) 1988-12-28
DE3881441D1 (de) 1993-07-08
US5253501A (en) 1993-10-19
ES2041723T3 (es) 1993-12-01

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