WO2012136187A1 - Plieuse pour tôle, utilisation d'une telle plieuse pour la fabrication de tube fendu et procédé de mise en forme d'une tôle pour former un tube fendu - Google Patents

Plieuse pour tôle, utilisation d'une telle plieuse pour la fabrication de tube fendu et procédé de mise en forme d'une tôle pour former un tube fendu Download PDF

Info

Publication number
WO2012136187A1
WO2012136187A1 PCT/DE2012/000329 DE2012000329W WO2012136187A1 WO 2012136187 A1 WO2012136187 A1 WO 2012136187A1 DE 2012000329 W DE2012000329 W DE 2012000329W WO 2012136187 A1 WO2012136187 A1 WO 2012136187A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
bending
roller
cheeks
cheek
Prior art date
Application number
PCT/DE2012/000329
Other languages
German (de)
English (en)
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 EP12717584.2A priority Critical patent/EP2694228B1/fr
Publication of WO2012136187A1 publication Critical patent/WO2012136187A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • 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
    • B21D5/10—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 for making tubes

Definitions

  • the present invention relates to a sheet metal bending machine, the use of such a method for producing slotted tubes and a method for forming a sheet into a slotted tube.
  • the sheet forming mentioned here occurs, for example, according to the classic three-roll bending process (also called rounding) usually in a so-called three-roll bending machine (also called a three-roll rounding machine) with a corresponding roll arrangement (compare, in this regard, and in particular to the corresponding roll arrangement of these machines, for example, Mathee, Gerhard, Lueger Encyclopedia of Technology, Vol. 9, Lexikon deriquesstechnik und Anlagenn, L - Z, p. 212, reverse sp. Below to the keyword "rounds" to p. 213, U. Sp.
  • Three-roll bending machine as the name implies, three rolls are used, usually a top roll and two bottom rolls, between which the sheet is rounded, ie formed into a tube.
  • the delivery of the rolls to the plate ie their relative position - in particular their vertical and / or horizontal position - to each other defines the radius of the pipe to be formed ment mentioned that the respective round machines or bending machines are occasionally also somewhat more generally referred to as bending rolls.
  • Flinzu sets the limit that sheet metal coils (ie cylinder-wound metal strips) are only available for sheet thicknesses up to 25 mm. Similar inflexibilities arise in the case of machines for the production of helical tubes, such as known from German Auslegeschiift 1 103 272, which is also not suitable for the production of slotted tubes.
  • the present invention is suitable for use in the manufacture of slot tubes with more than 25 mm plate thickness (also called plate thickness here), preferably of those with more than 40 mm plate thickness, especially if slot tubes with a diameter of less than 500 mm to be produced.
  • the Blechbiegemas invention chine with a Biegewangen- and / or roller assembly for forming at least in part at least in any case horizontally positioned in the horizontal direction (seen in cross-section to the L Lucasser extension of the slot tube to be formed) or - preferably only - rotatory (in cross-section to Leksserstrek - seen kung of the slot tube to be formed) moved sheet to a slit tube, has - seen in cross-section to the longitudinal extension of the slot tube to be formed - arranged on the concave as well as the convex side of the sheet to be formed bending cheeks and / or rollers and at least one against the bending sheet deliverable bending cheek on wherein the bending cheek and / or roller assembly or a part thereof relative to the sheet can be delivered so as to allow the bending of the sheet at at least one bending point to a certain radius.
  • a bending cheek is understood to mean any machine element serving to bend the sheet, which acts on the sheet and does not constitute a roll.
  • a bending cheek in particular approximately (eg movable, approximately horizontally or vertically displaceable or pivotable or rotatable [ie deliveries, in particular with regard to the sheet to be formed]) jaws or bending shoes that attack the sheet, as a bending cheek in the sense of here understood and referred to the present invention.
  • roller also called roll
  • any free-spinning, braked or driven roller can be used.
  • the sheet metal bending machine according to the invention is characterized in that by the delivery - preferably by horizontal or vertical positioning or by pivoting about an axis - the Biegewangen- and / or roller assembly or a part thereof to the during molding of the slot tube at least in parts in horizontal Direction - seen in cross-section to the longitudinal extension of the slot tube to be formed - fixed position or - preferably only - rotationally moving sheet the position of the respective bending point is selected on the sheet.
  • the rotational (ie rotating) movement of the sheet is preferably the only movement that can undergo the sheet to be formed during its formation to the slot pipe in its entirety, ie in all its parts .
  • the sheet metal bending machine according to the invention can thus preferably be designed such that the sheet remains or is fixedly positioned during shaping or (at least) during the (respective) bending of the slot pipe in the direction of the longitudinal extent of the slot pipe to be formed, for example by (at least) a bending beam on the sheet metal (during the (respective) bending or the shaping to the slit pipe attacks) .Since the bending beam does not represent a roll (thus also no roll) (so), which would be about fendeicardend or approximately braked or also driven approximately, that would Sheet metal in this case during a movement - as in a movement in the direction of the longitudinal extension of the slot tube to be formed - on the bending beam due to the friction occurring at the bending beam
  • the Blechbiegemascriine invention thus allows it by delivery of Biegewangen- and / or Wakenan himself against the sheet to be formed to determine the respective bending point on the sheet, and - in contrast to the above-mentioned Abkantpresse- without the sheet - apart from the quite simple means of rollers (rollers ) to be realized possibility of a rotational movement - by consuming handling equipment after each bending process, especially in the horizontal direction (seen in cross-section to the longitudinal extent of the slot tube to be formed) to reposition.
  • the bending point in the case of the present invention is preferably (particularly preferably alone) determined by the delivery of Biegewangen- and / or roller assembly against the sheet to be formed itself - except perhaps any rotations in the plane transverse to the longitudinal extension of the to be formed Slot tube - as far as possible - at least what the (in cross-section to the longitudinal extent of the slot tube to be formed seen) position in the horizontal direction - remains stationary.
  • the Biegegewangen- and / or roller assembly so moved or adjusted - so delivered to the plate that the sheet (apart from the aforementioned possible possibility of a rotational movement) itself can largely remain in its position.
  • the position of the sheet or a part of the sheet is at least in the horizontal direction viewed in cross-section with the longitudinal extent of the slot pipe to be formed - not changed.
  • the inventive device can therefore dispense with the costly and space-consuming handling devices for the sheet to be bent in the case of the press brake from the prior art and thus ensure a simpler and above all faster production of the slotted tubes, but without the widest possible product range in terms to have to renounce finished tube diameter, as would be the case with the use of a bending roll.
  • a device or device which serves for the rotational movement of the sheet or the positioning of at least a portion of the sheet during the forming of the sheet into a slotted pipe, ie a support (for example a support device) or support means or means for support), which serves for the storage of the sheet, preferably during the formation of the slotted tube.
  • this device it is possible to leave the sheet during its formation into a slot tube in relation to the Biegewangen- and / or roller assembly - seen in cross section to the longitudinal extent of the slot tube to be formed - in his Schwerpunkdage in the horizontal direction unchanged , And so at least a portion of the sheet - preferably located at the bottom edge of the foot line (in the longitudinal extension of the slot tube to be formed) - to position in the horizontal direction fixed (ie in the horizontal direction - seen in cross section to the longitudinal extension of Schhtzrohres to be formed - in to hold a fixed position).
  • such a support can have a support surface, preferably curved concavely upward, on which the metal sheet to be formed (for example during its molding, in particular also during the bending process at a respective bending point) can be supported.
  • the support surface for supporting the sheet ie on which the sheet can be stored or stored
  • the legs are preferably open, however, and then are not parallel. That - preferably Already pre-bent - sheet metal is thereby stored approximately on this support surface and is in this case along the curved contour - at least in part - on.
  • the support for the storage of the sheet may preferably also rollers (rollers) have on its support surface to the plate out, which means in particular also means that the support itself (about alone) from such rolls (rollers) can be constructed.
  • the support may also have approximately a frame or a frame or the like, for example with a (s.o.) curved support surface, which additionally provides rollers (rollers) along the contour of the support surface.
  • at least one roller (roller) on the support surface is designed to be height-adjustable towards the metal sheet so that an (axial) adjustment of the contour of the support surface of the metal sheet is also possible.
  • This is particularly preferred even when this device is designed as a support, as described above.
  • This can be designed approximately so that the sheet between cheeks, approximately on the concave as the convex side, such as by clamping, is held.
  • this is also possible by means of rolling or by a mixed arrangement of rollers and / or cheeks.
  • a preferred embodiment of the plate bending machine has - preferably in addition to the already on the convex and / or concave side of the sheet to be formed Biegewangen- or roller assembly - at least one bending cheek or roller, which - seen preferably in cross-section ztur longitudinal extension of the slot tube to be formed - Can be delivered against the sheet to be bent and generates a bias of the sheet in the delivery against the sheet, which at least supports the bending of the sheet, ie about the bending of the sheet and / or for the generation (only) of a voltage the sheet metal can be used.
  • At least one bending cheek or roller which generates a prestressing of the sheet metal is one which, seen in cross section to the longitudinal extent of the slot pipe to be formed, can be delivered against the sheet to be bent, where it - when it is placed against the sheet metal to be bent - on the sheet a force (Fbs) exerts a force component (Fbsv), which against or in the feed direction of the on the concave side of the arranged to be formed sheet bending beam or bending cheeks and / or roller or Wa zen acts and - as far as it acts against the feed direction - is smaller than its perpendicular thereto force component (Fbsh), wherein the term delivery direction is meant the direction in which the Biegewange (n) or roller (s) against the sheet (ie in the direction of the sheet) is or will be or the opposite direction to the direction in which the sheet against the bending beam (s) or roller (s) is moved.
  • a problem of tube forming may be that the devices used for this purpose - e.g. mentioned on the three-roll bending machines - are not always or only with great effort in a position to absorb the forces occurring in the processing of stronger sheets sufficiently.
  • the two last-described embodiments of the present invention attempt to mitigate this problem by largely avoiding the generation of forces that stress the elements of the machine design that may not be sufficiently stable.
  • Both embodiments make use of the fact that the force required for bending a sheet metal is also applied laterally (for instance with a force component which is in the opposite direction to the feed direction of the bending cheek or bending cheeks and / or roll or rolls arranged on the concave side of the sheet to be formed seen is smaller than its perpendicular force component) - for example, approximately perpendicular - can contribute to the Zustelhichtung these critical machine elements and as similar as it is possible to bend a sheet of paper between the hands from the side without this forces ( no major forces) up or down.
  • the sheet metal bending machine is characterized in that the force component which acts against the feed direction of the arranged on the concave side of the sheet to be formed bending beam or bending cheeks and / or roller or rollers, at least by a factor of 2, preferably at least by a factor of 5 is smaller as their perpendicular force component. It may also be beneficial if they contain less than 25%, preferably less than 10%, more preferably less than 5% of the total force, which generates the tension of the sheet. It is especially close to zero, for example with a maximum deviation of ⁇ 5%, preferably not more than ⁇ 3%, particularly preferably ⁇ 1% of the total force which generates the prestressing of the sheet.
  • an already pre-bent e.g. an already rounded at its edges - sheet metal is processed in the sheet metal bending machine according to the invention (see also the later comments on the method according to the invention also).
  • a first flat sheet but can also be otherwise - for example by generating a bending direction generating moment, e.g. by pressure by means of a punch (preferably, for example, about a bending cheek or about a roller) in the desired direction of bending - to ensure that the formation of the sheet comes to a slot pipe in motion.
  • the pre-bending of the sheet can also be done by pressing into a die, as shown here approximately in Fig. 7 later.
  • the rounding of the sheet edges can be done in addition to the already mentioned possibility mitteis a complex press brake by a special liier for intended bending press for metal sheets, which is much cheaper than the said press brake according to the prior art.
  • Such a particularly suitable for this purpose bending press for metal sheets is described in WO 2010/118759 A2, which is incorporated by reference in the disclosure here, and their use for the present invention in the context of the discussion of the local Fig. 4 also described , However, it is equally possible, indeed possibly even preferable, to make the rounding by means of an arrangement as described in more detail in FIGS. 8 and 9 here.
  • the sheet metal bending machine according to the invention is characterized in that arranged on the concave side of the sheet to be formed bending cheek or bending cheeks and / or roller or rollers is arranged on the upper side to be formed sheet or they are at least one bending cheek or W Lze (role) - (which is preferably provided in addition to the already provided on the upper and lower side of the sheet to be formed Biegewangen- or roller assembly) - which - seen in cross section to the longitudinal extension of the slot tube to be formed - laterally from the top side to be formed sheet metal arranged bending cheek or bending cheeks and / or roller or rollers is or are arranged and can be delivered from the respective side against the sheet to be bent or can.
  • the bending cheek or bending cheeks and / or roll or rollers arranged on the convex side of the metal sheet to be formed can or can be arranged on the lower side of the sheet to be formed.
  • the aforementioned upper or lower side oriented to the sheet to be formed arrangements correspond to a classic design, which forms the sheet to be bent with the concave side upwards, both under machine design considerations (the machine elements on the convex side can be anchored advantageously in the ground , the aforementioned bending cheek or roller can act from the side, which is structurally elegant - for example, by a car or a pliers construction - can be implemented), as well as from the point of optimal space utilization in the workshop (the formation of the pipe upwards towards is advantageous from a point of view) is to be welcomed.
  • the sheet metal bending machine according to the invention can also be arranged differently, for example by the fact that the machine elements on the convex side of a preferably formed slot tube (Teilschlitzrohres) laterally - to the left or right side - are arranged.
  • a preferably formed slot tube Teilschlitzrohres
  • Other arrangements are also conceivable.
  • a roller arrangement with one upper and two lower rollers is selected, wherein the rollers can preferably be delivered horizontally and / or vertically and in which at least one bending belt is provided, which - seen in cross-section to the longitudinal extension of the slot to be formed - is arranged laterally from the upper side to be formed sheets to roll and can be delivered from this side in each case against the sheet to be bent.
  • an obstacle such as a wall or some other fixed surface (wall), such as an adhesive coating, against which the sheet metal, ie the above-mentioned bending cheek is pressed laterally.
  • an adhesive coating for the wall (or the laterally acting bending cheek) can - depending on the sheets that are to be processed - also be provided sliding contact on the wall or side bending cheek, such as (a) additionally mounted there roller (s) (Roll [n]) or a lubricious coating.
  • an embodiment of the sheet metal bending machine according to the invention is particularly preferred in which two - preferably in addition to the already provided on the top and bottom Biegewangen- / alzenan extract - bending cheeks are provided - seen in cross-section to the longitudinal he stretching the slot tube to be formed - too both sides of the upper side are arranged to be formed sheets to roll and can be delivered from these two sides against the sheet.
  • This force can be generated from both sides at the same time, which allows a (roughly) mirror-symmetrical production, which is particularly time-saving and therefore cost-effective.
  • the respective deliverable from the side against the sheet bending beam is preferably horizontally and / or vertically adjustable (positionable) and / or pivotable about at least one axis (and preferably thereby deliverable against the sheet), which is the choice of a point of attack of the respective bending beam on the sheet and thus also the force direction control, as well as the control of the respective bending point can serve.
  • those components which can be delivered against the metal sheet are preferably also able to be ventilated by the metal sheet in order to be able to release it if necessary.
  • a laterally arranged roll can be provided which, like the corresponding bending cheek (s), are provided by the Side can be delivered against the sheet to be bent or can.
  • a roller can be used on one side and a bending cheek on the other side.
  • the rollers are preferably horizontally and / or vertically (against the plate) deliverable (and preferably optionally also ventilated from the plate [see above]), which also allows in the case of using rollers a controlled force application to the sheet to be formed.
  • a preferred embodiment of the sheet bending machine according to the invention is characterized in that arranged as a bending cheek assembly with top and bottom of the sheet to be formed bending cheeks arrangement with at least one - preferably two - bottom and one - preferably two - upper side bending cheek (s), the horizontal and / or can be delivered vertically and also at least one other - preferably two - arranged on the underside hinged bending cheek (s) is or are provided horizontally and / or vertically and / or by pivoting (preferably rotation) about an axis against the sheet can or can.
  • bending cheeks used, as seen - in cross section to the longitudinal extent of the slot tube to be formed - preferably the upper side lying outwardly and the underside located to the sheet bending cheeks inside
  • the bending machine according to the invention particularly preferably also at least one - preferably two, approximately opposite - bending cheek (s), which is seen in cross-section to the longitudinal extension of the slot tube to be formed - is arranged laterally from the upper side to be formed sheets bending beam or are and can be delivered from the respective side in each case against the sheet to be bent or can.
  • the underside and / or upper side bending cheeks are comb-like and can - preferably horizontally - are moved against each other so that they interlock and in this state against the sheet to be formed as a single bending cheek to wkken assets, such as when space must be worked, for example, when the upper bending cheeks attack by the remaining slot of the tube to be formed on the concave side and this end of the Rohrfotmungsreaes only a narrow gap is available, the width several bending cheeks side by side (about right and left) is no longer sufficient.
  • a slotted tube can then preferably be shaped as follows:
  • a flat sheet is first pre-bent, preferably rounded at its ends, preferably over a range of 90 ° of the (later) tube circumference and more preferably already on the (later) radius of curvature of the tube to be produced.
  • This pre-bent, preferably rounded sheet is then placed on bending cheeks (lower bending cheeks) and brought by the laterally arranged bending cheeks under Votschreib what happens by their delivery against the sheet from the side Then the bending cheeks arranged on the upper side are delivered against the sheet until they press it against the - opposite the upper bending cheeks further inside towards the middle of the sheet metal - lower cheeks, whereby it is fixed.
  • the respective other ver arranged below ver pivotable bending cheeks are then against the held by the laterally fed bending cheeks to be bent sheet - such as by pivoting, e.g. by rotation about an axis - delivered until the at the respective bending point (preferably under the respective upper bending beam) caused thereby bending (plastic deformation) has reached the predetermined or desired radius of curvature, depending on the material, any elastic resilience is taken into account.
  • the bending cheeks located on the upper side of the sheet are lifted and in the direction of the not yet formed on the desired radius of curvature of the sheet metal area (ie preferably towards the center), which is done by means of vertical and / or horizontal feed drives and / or other feed devices (possibly drives for ventilating or other ventilation devices) of the respective bending cheeks.
  • the sheet is fixed again and the bending cheeks again delivered against the sheet until the predetermined or desired Krürnmungsradius is reached at the new bending point.
  • the lateral bending cheeks are - if necessary interrupted by a morlmonten - tracked in their delivery against the sheet to keep this under bias and to maintain the resulting bending moment. This continues until the predetermined or desired radius of curvature has been reached at each point of the sheet, so that a slotted pipe has been created (see also FIG. 4 in detail later).
  • these preferably move towards one another at the end of the tube forming process and on the one hand save space and, on the other hand, act like a single bending cheek opposite the sheet to be formed, which is the last bending of the sheet - especially in the case of the symmetrical production of two sides - favored.
  • At least one pivotable bending cheek or pivoting roller can be delivered against the sheet, which is about the pivoting itself or by an additional device, such as a - hydraulic or electric - piston, the bending cheek about from its pivot point away (eg a telescopic linkage) and moves against the plate out.
  • the pivotability of the bending cheek or roller on the concave side of the sheet to be formed allows a particularly good control of the bending point, since the bending cheek or roller can be positioned at any position on the concave side of the sheet to be formed.
  • This can preferably by a corresponding configuration of the contour of the Biegewange still be supported by this about a small, but preferably rounded running contact surface (to prevent kinking at the bending point).
  • the pivoting bending cheeks or swivel rollers can - seen in the longitudinal extent of the slot tube to be formed - comb-like and are pivoted into each other so that they interlock and in this state against the sheet to be formed as a single bending cheek or roller are able to act what - how already explained - in the final stages of molding is beneficial.
  • the sheet metal bending machine which use at least one pivoting bending beam or roller on the concave side of the sheet so that the sheet metal bending machine has at least one bending cheek or roller, which - in cross-section to the longitudinal extension of the slot tube to be formed seen - laterally of the on the concave side, preferably arranged laterally of the or the upper side to be formed sheet metal bending beam or bending cheeks or roller or rollers is and can be delivered from this side in each case against the sheet metal or can.
  • This also allows a good control of the respective bending point by a coordinated interaction of the bending cheeks and / or roller (s) Fetner can be introduced from the side so the force required to bend the sheet, which is structurally favorable.
  • the sheet bending machine has two bending cheeks, which - viewed in cross section to the longitudinal extent of the slot tube to be formed - laterally of the or on the concave side of the sheet, preferably laterally of the or the upper side to be formed sheet metal bending beam or bending cheeks or roller or rollers are arranged and can be delivered from this side in each case against the sheet.
  • Such, preferably symmetrical arrangement of the lateral bending cheek (s) and / or roller (s) allows, in particular in conjunction with two symmetrically pivoted bending cheeks on the concave side of the sheet to be formed, a particularly efficient shaping of Schlitzrolires from a sheet, the during the entire molding in his - viewed in cross-section to the longitudinal extent of the slot tube to be formed - base does not need to be moved (and preferably also will not).
  • Elaborate handling equipment that spend the slot to be formed metal sheet again in the next required processing position, as is necessary in a corresponding press brake according to the prior art, it is therefore not required here.
  • the sheet metal bending machine according to the invention is preferably used for producing a slotted tube, which then only has to be closed with a weld seam. If one already uses rounded edges on the radius of curvature, then the subsequent reworking of the tube in the area of the weld, where fluted tubes which are produced with traditional state-of-the-art machines, often omits an edge area which is not sufficiently rounded, when using the plate bending machine according to the invention Have weld out.
  • Pre-bent sheets are preferably used as precursors for bending in the sheet metal bending machine according to the invention and (for certain embodiments, ie preferably those in which the sheet is prestressed is) particularly preferably pre-bent sheets, which are already rounded at the sheet ends over a certain range, for example about 90 °, the later pipe circumference to the final radius.
  • the slit pipe is preferably a steel slit pipe having a steel sheet thickness of at least 25 mm, more preferably at least 40 mm or even at least 50 mm.
  • the sheet metal bending machine according to the invention is used for the production of slit pipes of 500 mm diameter or less (eg 300 mm or less or even 200 mm or less).
  • the sheet metal bending machine according to the invention for the production of (slot) tubes so that the bending (plastic deformation) by the bending machine to the ultimate desired radius of curvature (ie the Endradius of the pipe to be produced) not necessarily done in one step got to.
  • the bending machine according to the invention can also be used so that the bend of the sheet initially given a radius to which the sheet is to bend, but not yet the ultimately desired radius of curvature corresponds in this case, the bending of the sheet is thus two- or step by step, by initially specifying larger radii than intermediate steps before, finally, in a final pass, the ultimately desired radius of curvature for bending is predetermined.
  • a - preferably pre-bent for example, a already rounded at the sheet ends on the Endradius - sheet metal is used, the sheet each at one -
  • the molding to a slotted tube migratory - bending point by means of delivery of at least one part - seen in cross-section to the longitudinal extension of the slot tube to be formed - bent on the concave as the convex side of the sheet to be formed bending cheek and / or roller assembly bent to a certain radius becomes wherein it is fixed during the bending at the respective bending point, but this fixation is released before bending the sheet at a subsequent bending point, and wherein the respective position of the bending point of the sheet by the delivery - preferably by horizontal or vertical positioning or by pivoting about an axis - at least a portion of the bending cheek and / or roller assembly against the during forming the slot
  • the sheet metal can remain or be stationarily positioned as seen during the shaping and / or also of the (respective) bending of the slot pipe in the direction of the longitudinal extension of the slot pipe to be formed.
  • the pre-bending of the sheet can be done by pressing into a die, as shown here for example in Fig. 7 later.
  • the rounding of the sheet edges can be done in addition to the possibility already mentioned by means of a complex press brake according to the prior art by a special rner In suitable bending press for metal sheets, which is much cheaper than the said press brake according to the prior art.
  • the corresponding special bending press for sheet metal panels is described in more detail in the discussion of the local Fig. 4 and in WO 2010/118759 A2, which is incorporated herein by reference in the disclosure.
  • the formation of a sheet to a slotted tube can also be carried out in several steps, that is, that the sheet is not immediately bent to the final radius, but rather in two or more steps, it being in the intermediate steps initially each bent to a radius which is even greater than the actual desired end radius.
  • the starting material of the method according to the invention is preferably a metal sheet which has already been rounded to the end radius over a range of at least 90 ° of the later pipe circumference, since in this way the bending cheeks or rolls used for the prestressing can act on the rounded areas of the metal sheet. that the force as close as possible in the direction of a vertical, preferably (nearly) perpendicular to the feed direction of arranged on the concave side of the sheet to be formed bending beam or bending cheeks and / or roller or rollers attack what the Kraftkornponente acting against this feed direction and consequently the elements arranged on the concave side would burden, minimize, even omit or even act as a stopper.
  • the method according to the present invention can be carried out with the sheet metal bending machine according to the present invention, it being noted that this also with a pure roll assembly for controlling the bending process with arranged on top and bottom side of the sheet to be formed rolls, which are approximately horizontal and / or can be delivered vertically, including about a classic three-roll bending machine falls, can happen.
  • the inventive method is characterized in that the force component which acts against the feed direction of the arranged on the concave side of the sheet to be formed bending beam or bending cheeks and / or roller or rollers, at least by a factor of 2, preferably at least by a factor of 5 is smaller than their perpendicular force component. It may also be beneficial if it is less than 25%, preferably less than 10%, more preferably less than 5% of the total force that generates the bias of the sheet. Most preferably, it is approximate Zero, for example with a maximum deviation of ⁇ 5%, preferably not more than + 3%, more preferably + 1% of the total force that generates the bias of the sheet.
  • the sheet for fixing or solution (ventilation of the arrangement or a part thereof from the sheet metal) of the sheet serves as the Biegewangen- and / or roller assembly or a part thereof, the sheet, such as in his (preferably not yet rounded) Bleclimitte on a certain radius, preferably the end radius of the sheet metal ends bends.
  • the fixing of the sheet is used for the controlled bending of the sheet at a predetermined bending point to a certain radius, preferably (immediately) the predetermined or desired radius of curvature.
  • the inventive method for forming a sheet to a Schlitzroht is characterized in that the bending cheek and / or roller, which is delivered against the sheet to be bent, wherein it exerts on the sheet a force which generates a bending of the sheet supporting bias during the tube forming process - preferably when bending the sheet at a bending point - is readjusted against the sheet (ie preferably that the force with which the delivery of the bending cheek and / or roll is made against the sheet is kept the same) at least to maintain the bias supporting the bending of the sheet, otherwise the bending beam (s) or roll (s) on the concave side of the sheet to be formed will not (or little) burden the effect in the course of the forming process in particular during bending of the sheet (plastic deformation) at a bending point, also due to the decreasing prestressing and the s I threaten to get lost as a result of this decreasing bending moment.
  • you adjust you maintain the preload and the desired
  • a further embodiment of the method for forming a sheet into a Schlitzrohx according to the present invention is characterized in that for generating the bias of the sheet by the bending cheek or roller, which supports the bending of the sheet, in each case before the fixation of the sheet such a force (Fbs) is exerted on the sheet, the bending moment (Mbs) thereby generated alone remains below the moment required for the bending of the sheet and then the sheet after its fixation by a Biegewangen- and / or roller assembly or a part thereof is bent to the specific radius, preferably the end radius, in which this arrangement or a part thereof with the necessary bending moment for the additional required force (Fbu) is delivered against the sheet.
  • the already pre-bent, for example rounded, sheet is bent by means of a bending beam and / or roll arrangement, in which the bending cheek or bending cheeks and / or roll or rolls arranged on the concave side of the sheet to be formed have upper side to the sheet to be formed and arranged on the convex side of the sheet to be formed bending cheek or bending cheeks and / or roller or rollers are arranged below the sheet to be formed and the bending cheek and / or roller, which is delivered against the sheet, wherein it exerts a force on the sheet , which generates a bias supporting a bending of the sheet, is arranged laterally of the or the upper side to be formed sheets bending beam or bending cheeks and / or roll or rollers and is delivered from this side against the sheet metal or be.
  • a bending beam and / or roll arrangement in which the bending cheek or bending cheeks and / or roll or rolls arranged on the concave side of the sheet to be formed have upper side to the sheet to be
  • This procedure shapes the sheet metal with the concave side upwards, which is to be welcomed from the point of view of optimum utilization of space in the workshop (the shaping of the pipe upwards is already advantageous from a point of view of space).
  • the method according to the invention can also be carried out oriented in other directions.
  • FIG. 1 is a schematic representation of a prior art three-roll bending machine in cross-section
  • 3 a is a schematic representation of a sheet metal bending machine according to the invention in cross-section at the beginning of the molding process for the slotted pipe before a bending operation of the sheet,
  • FIG. 3b is a schematic representation of the sheet metal bending machine according to the invention according to Fig. 3a in cross section, but here at the beginning of the forming process of the sheet to the slot pipe,
  • FIG. 3c shows a schematic representation of a detail from FIG. 3b, the result being the bending moment relevant for the bending
  • Fig. 3d shows a similar section of the bending machine according to the invention as shown in Fig. 3c, in which case the force exerted by the lateral bending cheek on the sheet metal has a vertical component, but which does not act against the feed direction of the upper bending beam, but in the direction of this and so as to help compensate for the forces acting perpendicularly on the upper bending cheek,
  • Fig. 3e in turn a similar section of the inventive bending machine as in
  • Fig. 3f in turn a similar section of a bending machine according to the invention as in
  • roller assembly is used according to the invention (the preferably mirror-symmetrical left-hand part of the device, as well as the parts arranged on the convex side [below] the sheet are not shown here),
  • Fig. 4 shows a preferred embodiment of the sheet metal bending machine according to the invention in the bending cheek assembly with upper and lower sides arranged for forming sheet bending cheeks an arrangement with two underside and two upper side bending cheeks is provided, which are delivered horizontally and vertically against the sheet and released from this and also two other lower-mounted pivoting bending cheeks, which are also horizontal and vertical and can be delivered by pivoting about an axis against the sheet to be bent or can be lifted from this, as well as the formation of a slot tube by means of this embodiment of the sheet metal bending machine according to the invention in a schematic representation of the sequence of different steps of this process from top to bottom,
  • FIG. 5 a shows a particularly preferred embodiment of the plate bending machine 5d according to the invention in which two bending-type bending cheeks are provided, which are arranged on the concave side of the metal sheet to be formed on the concave side of the sheet to be formed, in the form of a sheet to be formed, viewed in cross-section to the longitudinal extension of the slot tube to be formed.
  • two bending-type bending cheeks are provided, which are arranged on the concave side of the metal sheet to be formed on the concave side of the sheet to be formed, in the form of a sheet to be formed, viewed in cross-section to the longitudinal extension of the slot tube to be formed.
  • the shaping of a slot tube by means of this embodiment of the sheet metal bending machine according to the invention in a schematic representation of the sequence of different steps of this process, each from top to bottom,
  • Fig. 5e an alternative embodiment of the sheet metal bending machine according to the invention
  • FIG. 6 is a cross-sectional view of a constructional ealleitersmöghchkeit the most preferred embodiment of a bending machine according to Fig. 5a - 5d according to the present invention
  • Fig. 7 is a cross-sectional view of a device for pre-bending of the later to
  • Fig. 8 is a cross-sectional view of a device for rounding the plate ends of the later to the slit tube to be formed sheet prior to rounding, and
  • Fig. 9 is a cross-sectional view of a device for rounding the plate ends of the later to the slot tube to be formed sheet according to FIG. 8 after rounding.
  • Fig. 1 shows a schematic representation of a three-roll bending machine according to the prior art in cross-section with upper roll 1, as well as left and right lower roll la, lb.
  • the problem with this embodiment of a sheet metal bending machine according to the prior art the load of the upper roller 1. If this is too high, perhaps due to the bending to thicker stable sheets 5 - such as steel sheets with thicknesses of more than 25 mm or even more than 40 mm Thus, the top roller 1 can no longer apply the force F 0 required for this purpose.
  • FIG. 2 accordingly shows a schematic view of a top roll 1 of the prior art three-roll bending machine in the longitudinal direction, symbolizing its deflection problem.
  • the force F 0 with the upper roller 1 is delivered against the plate
  • FIG. 3a shows a schematic representation of a sheet metal bending machine according to the invention in cross section at the beginning of the forming process to the slit pipe before a first bending of the sheet 5
  • Fig. 3b is a schematic representation of the sheet bending machine according to the invention according to Fig. 3a in cross section, but here at the beginning of the molding process of Sheet 5 to the slotted tube. Both figures, ie Fig. 3a and Fig. 3b are then discussed below together.
  • the same arrangement - as shown in the right part of the device shown here - be provided on the left side mirror symmetry.
  • the bending beam ld is arranged laterally from the upper side to be formed to the sheet 5 to be formed or bending beam 1 and can be delivered from this side against the sheet 5.
  • the bending beam ld is also vertically and / or horizontally against the sheet 5 deliverable, and pivotable about at least one axis 7, whereby it is also against the plate 5 deliverable.
  • the bending che ld is delivered horizontally against the sheet 5, wherein the force component of the bending beam ld driving force acting against the feed direction 8 arranged on the concave top of the sheet to be formed 5 bending beam 1, smaller - here namely zero - is, as their perpendicular force component - here the entire force Fbs, which acts exactly perpendicular to the feed direction 8 -.
  • the bending cheeks 1, 1a, 1b, 1c, 1e arranged on the underside and on the upper side can each be delivered horizontally and vertically here, which is indicated by the (dashed) arrows.
  • the other lower side bending beam lc is also pivotable about an axis 3, so that they can be delivered against the sheet to be bent 5, in which case also a force F u acts against the sheet 5.
  • a slot pipe can be formed from the metal sheet 5 to be formed.
  • another device such as a face milling machine (see, for example, the corresponding explanations in the general part of the description here) 6 on one side and the lateral bending beam ld placed on the other side on the lower cheeks la, lb.
  • the lateral bending beam ld is then viewed (in a cross-section to the longitudinal extent of the slot tube to be formed) (approximately) horizontally against the right-hand side, already mounted on the right.
  • Dete Blechende delivered wherein it exerts on the sheet a force F bs , which - by pressing the sheet 5 against the wall 6 - generates a bias of the sheet 5, which supports the bending of the sheet 5 and the force component against the feed direction 8 of on the concave side of the sheet to be formed bending beam 1 is smaller (namely here [approximately] zero), as their perpendicular force component, which - due to the selected here horizontal orientation of the force Fbs - here (approximately) of the total force Fbs corresponds.
  • the sheet 5 is bent to the desired Kj mmungsradius by the other lower side bending beam lc against the held by the laterally bent bending beam ld and to be bent sheet 5 by lateral process and / or lifting and / or pivoting - here mainly by Pivoting, namely rotation about the axis 3 - is delivered until the at the respective bending point - here below the upper bending beam 1 - thus caused bending has reached the predetermined or desired radius of curvature.
  • the lateral bending beam ld is readjusted (in this case moved horizontally to the left).
  • the upper side of the sheet metal bending cheeks 1 and le are released, ie against their delivery direction 8, that is driven away from the plate, thus solving its fixation.
  • the lateral bending beam ld ventilated, ie the sheet 5 away - here to the right - are moved, which is preferably the bias only slightly solving happens (about so that in this case 95% or at least 90% of the bias of the sheet 5 generating force Fbs are preserved).
  • the cheeks 1, 1b and 1c are then moved in the direction of the area of the sheet 5 which has not yet been formed to the desired radius of irrigation - in this case to the left -, which is achieved by means of the vertical and / or horizontal actuators and feed devices of the respective bending cheeks 1, 1b , and lc happens. Is this the next one - now further in the direction of the still unformed area of the lead.
  • the bending cheeks 1, 1a, 1b and le are again delivered against the metal sheet (that is to say in the feed direction) until the sheet is again fixed at a bending point farther to the left for the renewed bending operation.
  • a slotted pipe - for example also a (partial) slit pipe, that is, for example, is provided.
  • a right- or left-sided shaped (half) slot tube - has arisen, whereby from the time when the lower bending cheeks la and lb abut one another, either the left lower bending cheek la - for example by lowering - is driven away or this bending cheek la from this Time assumes the function of the right lower bending beam lb, which either remains in its previously reached position or even even driven to the right.
  • FIG. 3 c shows a schematic representation of a detail from FIG. 3 b, wherein the result is the bending moment relevant to the bending.
  • the vertical force component Fbuv of the force Fbu acts here against the upper bending cheek 1.
  • the force Fbu acting on the plate 5 by the pivotable lower bending beam lc not only has a vertical component Fv acting directly on the upper beam 1, but also loads the upper bending beam 1 beyond that, since the bending cheeks 1, 1b, 1c and form the sheet to be bent 5 from the time of fixing the sheet 5 through the upper cheek 1 and the lower cheek lb a static system; this, of course, in the state in which this system is at the time of fixation, i. in the state biased by the lateral bending beam ld.
  • the moment required for bending (plastic deformation) of the sheet may also be combined, i. E. in the interaction of both elements (lower ver pivotable bending beam lc and side wall ld) are generated, so as well as the lower beam lc the bending moment with generating the side wall ld can be nachge leads.
  • the side cheeks ld - for example by means of their pivoting possibility about the axis 7 - for better control other than only horizontally against the sheet to be bent 5 deliver.
  • AFbs is the amount of the difference between the force (exerted by the side walls ld on the sheet 5) force at the time of the respective fixation of the sheet to be bent 5, namely Fbs and the increased force of the side che ld during the bending of the sheet is exercised.
  • the ottrude device of the invention allows the control of these forces so that thereby the desired low load on the upper beam 1 can occur. How it affects about a pivoting of the side wall ld and how this can be used to control the forces acting, in particular acting on the upper beam 1 against the ZusteUiichtung 8 forces is discussed to Figs. 3d and 3e below.
  • the upper bending cheek 1 can therefore according to the invention only slightly loaded (relieved) and therefore less stable than to be designed according to the prior art, since it must now intercept significantly less bending forces. So she can e.g. be designed as a thin sword, which also fits through the narrow slot of the slot tube to be formed through or as a (thin [ie a small radius or diameter having]) roller.
  • the lateral bending beam ld and / or the wall 6 are designed so that the sheet to be bent 5 relative to the surface of these elements to gliding, so as to assist the molding process. This can be achieved, for example, by rolling or else a lubricious surface on the sheet metal attack side of the corresponding elements 1, 6.
  • Fig. 3d shows a similar section of the bending machine according to the invention as seen in Fig. 3c, in which case exerted by the lateral bending beam ld on the sheet metal force Fbs has a vertical component F sv, but here not against the feed direction 8 of the upper bending beam 1 acts, but (with) acts in the direction of this and so helps to act perpendicular to the upper bending beam forces F uv and FR to compensate.
  • the force component Fbsv which acts against the feed direction 8 of the bending cheek 1 arranged on the concave upper side of the metal sheet 5 to be formed, is also smaller - namely even negative - than its perpendicular force component - here the force Fbsh, here works horizontally.
  • FIG. 3e again shows a similar section of the bending machine according to the invention, as can be seen in FIGS. 3c and 3d, the force Fbs exerted on the sheet by the lateral bending beam 1 once again having a vertical component Fbsv which, however, now bears against the advancing direction 8 of FIG upper bending beam 1 acts and so loaded the upper bending beam.
  • the force acting on the upper bending beam 1 force component is thus according to the invention still sufficiently small in this situation, so kept smaller than the force component perpendicular thereto. Only a small portion of the force used to bias the sheet Fbs> namely the force load FBSV the upper bending beam 1 (assuming the force FB is during sheet bending does not increase) with. There is also no risk that this proportion is too large, that is about the same order of magnitude as the horizontal force Fbsh achieved, since this would mean that the lateral bending beam ld to pivot upward opening about the axis 7, whereby the sheet from a certain opening angle would jump out - even at higher (and also more undesirable here) static friction on the bending beam ld - up and then no bias would be generated. With regard to the bending According to the individual moments and forces produced by the forces Fb s and Fbu, the same holds true for the moments and forces described here, as has been said for FIGS. 3c and 3d.
  • FIG. 3f again shows a similar section of a bending machine according to the invention as shown in FIG. 3c, but here a pure roller arrangement is used according to the invention (preferably the mirror-symmetric left part of the device, as well as on the convex side [below] the sheet arranged parts are not shown here).
  • the right-hand roller Id generates the prestressing here and the roller 1 arranged on the side of the sheet metal is supplied with sufficient force against the metal plate so that, together with the right-hand roller ld inducing the prestressing of the plate 5, a bending moment sufficient for plastic deformation is applied and the sheet 5 is bent.
  • the position of the rollers 1, ld to each other thereby determines the radius of curvature of the sheet.
  • the force component Fbsv which acts against the feed direction 8 of the roller 1 arranged on the concave upper side of the sheet 5 to be formed, is (clearly) smaller than its perpendicular force component - here the Kxaft Fbs h , which acts horizontally.
  • the force acting on the upper roller 1 force component is thus kept small in this situation according to the invention. Only a smaller proportion of the force Fbs used to bias the sheet, namely the force Fbsv, loads the top roll 1.
  • FIG. 4 shows a particularly preferred embodiment of the sheet metal bending machine according to the invention in which a bending beam arrangement with upper and lower sides arranged to be formed sheet 5 bending beams 1, lb and lc an arrangement with two lower side lb and two upper side bending cheeks 1 is provided, the can be delivered horizontally and vertically against the sheet 5 and released from it; and also two other lower-mounted pivotable bending cheeks lc, which also horizontal and vertical so- as can be delivered by pivoting about an axis 3 against the sheet 5 and can be released from this.
  • the shaping of a slot tube by means of this sheet metal bending machine according to the invention is to be seen in a schematic representation of the sequence of different steps of this process from top to bottom.
  • the individual elements of the sheet metal bending machine according to the invention are provided here only in the right part of the mirror-symmetrical representation with reference numerals, as shown in the left half instead the delivery and L predominantly responsible the individual bending cheeks by arrows, which of course for the right Find part application.
  • the imple mentation here form of the bending machine according to the invention also has two opposite bending cheeks ld, which - seen in cross section to the longitudinal extent of the slot tube to be formed - are arranged laterally from the upper side to be formed to sheet metal 5 bending cheeks 1 and from the respective side can be delivered in each case against the sheet 5.
  • the lower side lb and upper side 1 arranged bending cheeks 1, lb are comb-like and can be moved horizontally against each other so that they can interlock and act in this state against the sheet to be formed 5 as a single bending cheek, namely, for example, when the bending cheeks 1 attack through the remaining slot of the tube to be formed on the concave side of the sheet 5 and this is the end of the tube forming process, only a narrow gap available, for several bending cheeks (namely right and left bending beam 1 here) no longer sufficient. But even with the arranged on the underside of the sheet 5 bending cheeks lb proven this principle of comb-like meshing.
  • a slot pipe can then be formed as follows:
  • a flat sheet 5 is first by means of a mer
  • Vorbiegevoriques such as a bending press for metal sheets according to WO 2010/118759 A2, which is incorporated by reference into the disclosure here, preferably with a machine frame having a cheek assembly in the machine frame in the longitudinal extension in approximately each arranged parallel to each other upper cheek and lower cheek, which is designed in the working and insertion area of the metal sheet 5 and in cross section to the longitudinal extent of the cheeks approximately crescent-shaped, wherein the lower and upper cheeks form the end points of the open sickle and a bending cheek for bending -
  • rounding ie (partially) circular bending - the metal sheet 5, which is arranged inside the sickle, wherein an actuator or more actuators is or are provided, the or the bending beam on the one hand and the machine frame or a part thereof - about upper or lower - on the other
  • Freeforming is thereby made possible in that both the sheet feed (or retraction) in the (from) the bending press for processing, as well as the aforementioned relative delivery in any intermediate positions is possible, wherein in contrast to the bending rolls feed and bending during pressing (Delivery of the actuators for bending) alternately (intermittently), but not done simultaneously.
  • it is necessary to sufficiently absorb the high forces occurring during pressing which is made possible by the sickle-shaped design of the machine frame according to WO 2010/118759 A2.
  • WO 2010/118759 A2 which is hereby incorporated by reference into the disclosure.
  • the sheet 5 which has been bent around with the bending press according to WO 2010/118759 A2 can then be shaped into a slotted tube (TeüschJitzrohi) further in the sheet bending machine according to the invention, for example by the method according to the invention for bending a sheet 5 Normally so that at the end of the tube forming process cores re-forming the sheet edges is more necessary, since this is already done with the aforementioned bending press for metal sheets 5 in the way of the sheet edges beveling preforming.
  • a slotted tube TeüschJitzrohi
  • the bending press according to WO 2010/18759 A2 is preferably used for rounding a metal sheet 5 by at least one quarter of the circumference of the pipe on at least one sheet metal edge, this occurring particularly preferably on two opposite edges of the metal sheet 5. This corresponds to a bending angle of at least 90 ° at each of the two sheet edges.
  • a tube forming process can be initiated, which allows, in contrast to the classical tube forming method, the tube from the edges already largely bring in its intended form, which reduces the remaining effort in the final molding, since it only in the middle of Sheet metal 5 must be rounded to the end. This avoids the problem of insufficiently shaped sheet edges, without exposing them to unnecessary bruising and also facilitates the final shaping.
  • the starting product can thus be rounded in the form of a flat sheet 5 and then by the method of the present invention Invention, further processed with the inventive sheet metal bending machine.
  • the tube forming process (ie the formation of a slotted tube from a sheet) then finds its continuation in that the sheet to be bent 5 is initially biased by the lateral bending che Id, by being delivered horizontally against the rounded sheet ends from both sides.
  • the bending cheeks 1 located on the top side of the sheet metal are released. Then, the lower and upper side bending cheeks 1, lb, lc in the direction of not yet formed on the desired radius of curvature of the sheet 5 - in this case to the center - proceed, which means of vertical and horizontal feed drives and / or other delivery devices (possibly. Drives for ventilation or other ventilation devices) of the respective bending cheeks 1, lb, lc happens.
  • the bending cheeks 1 are again delivered against the metal sheet in order to fix it again and subsequently to bend by feeding the lower, pivotable bending beams lc until the predetermined or desired radius of curvature is reached at this new bending point.
  • the lateral bending walls ld are thereby tracked in their delivery against the sheet 5 in order to keep this under prestress and to maintain the resulting bending moment. Possibly.
  • the force acting on the lateral bending cheeks ld during the bending process can also be increased, whereby, however, must be taken into account that this increase in force during bending leads to an increased reaction force on the upper bending cheeks 1, which additionally burden them.
  • the molding process described above is preferably continued until at each point of the sheet 5 reaches the predetermined or desired radius of curvature and so a slot pipe is formed.
  • the comb-like design of the bending cheeks 1, lb makes it possible for them to merge into one another towards the end of the tube forming process, on the one hand saving space and, on the other hand, the folding cheeks 1, 1b acting against the metal sheet 5 to be formed, acting as a single bending cheek 1, 1b the last shaping bends of the sheet 5 - especially in the case of symmetrical production shown here from two sides - favors.
  • FIG. 5a-5d show a particularly preferred embodiment of the sheet bending machine according to the invention in which two scissors-like bending bending cheeks 1, le are provided, which - seen here in cross section to the longitudinal extent of the slot tube to be formed - on the concave side of the sheet to be formed 5 on the upper side are arranged to form sheet 5, as well as the formation of a slot tube by means of this imple mentation - form of the sheet metal bending machine according to the invention in a schematic representation of the sequence of different steps of this process each from top to bottom.
  • the sheet metal bending machine according to the present invention which is to be seen here, has a bending beam arrangement 1, Id, le for forming a metal sheet 5 which is stationarily positioned at least in part in the horizontal direction during forming, to form a slot pipe.
  • At least the lateral bending cheeks ld can here - seen in cross-section to the longitudinal extension of the slot tube to be formed - are delivered against the sheet 5 by horizontal displacement. Also, the entire bending cheek assembly 1, ld, le and even a part thereof against the sheet 5 can be delivered so as to allow the bending of the sheet 5 at least one bending point to a certain radius, as the further description will show.
  • the delivery - here the horizontal delivery of the bending cheeks ld, which are arranged laterally to the upper side to be formed sheet 5, arranged bending cheeks 1, le and a scissor-like pivoting of the bending cheeks 1 and le about the axis 12 - against that along its foot line FL (ie, its very bottom, in the direction of the lengthwise extension of the slot tube to be formed line) during the entire formation to the slotted tube in the horizontal direction fixedly positioned sheet 5, the position of the respective bending point on the sheet 5, as will also be seen.
  • foot line FL ie, its very bottom, in the direction of the lengthwise extension of the slot tube to be formed line
  • the starting product here is a pre-bent plate 5 use whose ends are also already rounded to the desired end radius of the slot tube to be formed.
  • the sheet 5 remains during its entire formation to the slotted tube at least in parts, here in his - seen in cross-section to the longitudinal extent of the slot tube to be formed - foot line FL, so its bottom line in the horizontal direction fixedly mounted on the support lf; Any conceivable height adjustment of the overlay lf would not change this, as this would only affect the position of the foot line FL in the vertical direction. Their position in the horizontal direction, on the other hand, would not be changed as a result, they would then still be stationarily positioned in a horizontal direction.
  • the sheet 5 is in each case on a - during the formation to a slit pipe - bending point by means of delivery of said top as the laterally arranged bending cheeks 1, ld, le to a certain radius - here the end radius of the slot tube to be formed - bent, wherein it during the bending at the respective bending point - here by the Biegew T angean extract 1, ld, le itself - is fixed, but this fixation before bending the sheet 5 at a subsequent bending point but (respectively) is released again. In the present case, the fixation is thereby released before each subsequent bending point.
  • the respective position of the bending point of the sheet 5 is characterized by the delivery - here by horizontal positioning of the lateral bending cheeks ld and / or by pivoting the upper bending jaws 1 and ld around an axis 12 - compared to that during the molding of the slot tube in its part along the already mentioned foot line FL in the horizontal direction stationarily positioned sheet 5 is selected.
  • the bending radius is determined by the force or the way in which the lateral bending cheeks ld are delivered to the sheet on the convex side.
  • the contour of the sheet to be formed top sheet bending cheeks 1, le on the concave side here is not about a shaping contour, but here, as already mentioned, solely the Kriickschutz. It is to be chosen so that the lateral bending cheeks ld can be delivered sufficiently against the sheet to be bent, i. so that the desired bending radius can also be achieved and the bend is not stopped about by the contour of the bending beam ld before the bleached for the bending point bending radius is reached. But it is also conceivable that the contour is chosen so that it determines the bending shaping.
  • the lateral bending cheeks ld are again released from the metal sheet 5, ie here they are driven horizontally away from the sheet metal 5, which can be seen for the first time in Fig. 5b above.
  • the sheet 5 springs back a little elastically, thereby releasing the contact with the pivotable bending cheeks 1, le present on the concave side.
  • the lateral bending cheeks are again delivered against the plate 5, which in turn is bent at the newly selected bending point on the end radius desired for the slot tube to be formed.
  • FIG. 5c this process is then shown again with progressive shaping of the slot tube.
  • Fig. 5d shows in the same way the completion of the molding process, where finally the two pivotable bending cheeks 1, le abut and form the lower bottom opposite the upper slot of the pipe to be formed in cooperation with the two lateral bending che forms ld (bending).
  • the slit tube thus formed can then be pushed out in the direction of its longitudinal extension out of the bending machine according to the invention, whereupon it only has to be welded along the remaining slit due to the already rounded plate ends in order to produce a finished tube.
  • FIGS. 5a-5d shows an alternative embodiment of the sheet metal bending machine according to the invention according to FIGS. 5a-5d and a section of the forming process of a slot pipe by means of the embodiment shown here orm the sheet metal bending machine according to the invention in a schematic representation of the sequence of different steps of this process from top to bottom.
  • the sheet metal bending machine which can be seen here, has a roll and bending beam arrangement 1, 1 a, 1 b, 1 d, 1 g, for forming a metal sheet 5 that moves during molding (only) in a rotational manner to form a slot pipe.
  • a roll and bending beam arrangement 1, 1 a, 1 b, 1 d, 1 g for forming a metal sheet 5 that moves during molding (only) in a rotational manner to form a slot pipe.
  • On the concave side of the sheet to be formed 5 - located here on the upper side to be formed plate 5 - two pivotable - preferably free-rotating - rollers (or rollers) 1, le arranged.
  • On the convex side of the sheet to be formed 5 are two bending cheeks ld. Again, the lateral bending cheeks ld - seen in cross-section to the longitudinal extent of the slot tube to be formed - are delivered against the sheet 5 by horizontal displacement.
  • the bending cheeks ld and thus a part of the rolls and bending cheek assembly 1, la, lb, ld, le, lg against the sheet 5 can be delivered so that it allows the bending of the sheet 5 at least one bending point to a certain radius.
  • the sheet metal bending machine has a device 1a, 1b, 1g for the rotational movement of the metal sheet 5 during the shaping of the metal sheet 5 towards the glass tube.
  • the roller assembly la, lb, lg which also has the driven roller lg, the sheet 5 can be easily rotated during its formation to the slot tube to then - but no longer symmetrical - in a corresponding manner as in Fig. 5a - 5d bent to become.
  • the device 1 a, 1 b, 1 g which serves for the rotational movement of the metal sheet 5 during the shaping of the metal sheet 5 into a slot pipe, is at least also represented by a part 1 a, 1 b, 1 g of the bending beam and roll arrangement 1, 1 a, 1 b, 1 d, le, lg formed. Further, by the underside arranged to be formed sheet two rollers (rollers) la and lb a support lf with an upwardly concave support surface is formed, the rollers la, lb to the plate 5 out.
  • the pivotable rollers are also 1, le - seen in the longitudinal extent of the slot tube to be formed - preferably comb-like and can be pivoted towards each other at the end of the molding process that they interlock and in this state against the sheet to be formed as 5 a single roller 1, le able to act.
  • Det shaping process itself runs here, apart from the asymmetry already mentioned, otherwise according to the in Fig. 5a - 5d to be seen from imple mentation of the method of the invention, which is why here only a section in turn is shown running down from top to bottom.
  • Fig. 6 shows a cross-sectional view of a constructive implementation possibility of the particularly preferred embodiment of a bending machine according to Fig. 5a -. 5d according to the present invention, namely the cross-sectional view of an element of the machine according to the invention, such elements in the longitudinal extension of the slot tube to be formed in succession up to the maximum pipe length, which should be made to be arranged.
  • the here seen element of a plate bending machine comprises a bending beam assembly 1, ld, le for forming a during forming at least in part in a horizontal direction - again in cross-section to the longitudinal extent of the slot tube to be formed - fixedly positioned sheet 5 to a slot tube on.
  • At least the lateral bending cheeks ld can here - seen in cross-section to the longitudinal extension of the slot tube to be formed - are delivered against the sheet 5 by horizontal displacement.
  • the entire bending cheek assembly 1, ld, le and even a part thereof against the sheet 5 can be delivered so as to allow the bending of the sheet 5 at least one bending point to a certain radius. Also determines the delivery - here the horizontal delivery of the bending cheeks ld, which are arranged laterally to the upper side to be formed plate 5, bending cheeks 1, le and a scherenartiges Ve pivot the bending cheeks 1 and le to the axis 12 - against the enüang the Lines LI and L2 (ie seen along the support lines on the support f in the direction of the longitudinal extent of the slit tube to be formed) during the entire molding to the slotted tube in the horizontal direction fixedly positioned sheet 5, the position of the respective bending point on the plate. 5
  • the starting product here is a pre-bent sheet 5 use whose ends are also already rounded to the desired end radius of the slot tube to be formed,
  • the sheet 5 is here once to be seen as yet to be formed sheet 5 but also as already formed to the contactor tube 5 inside the machine.
  • the sheet 5 to be formed remains during its entire formation to the slot tube at least in parts, namely along its - seen in cross-section to the longitudinal extent of the slot tube to be formed - lines LI and L2, ie along its support lines LI, L2 on the support lf in the horizontal direction (Seen in cross section to the longitudinal extent of the slot tube to be formed) stored stationary (positioned).
  • the sheet 5 is in each case on a - during the molding to a slotted tube migratory - bending point by means of delivery of said top as the laterally disposed bending cheeks 1, ld, le to a certain radius - here the end radius of the slot tube to be formed - bent, wherein it during the bending at the respective bending point - here by the bending beam assembly 1, ld, le itself - is fixed, but this fixation before bending the sheet 5 at a subsequent bending point but (each) is released again.
  • the respective position of the bending point of the sheet 5 is characterized by the delivery - here by pivoting the upper bending jaws 1 and le about an axis of rotation 12 or by horizontal positioning of the lateral bending cheeks ld - compared to that during the molding of the slot tube in its parts along the already mentioned Lines LI and L2 (in the horizontal direction - seen in cross-section to the longitudinal extent of the slot tube to be formed -) stationarily positioned sheet 5 is selected.
  • Fig. 7 shows a cross-sectional view of a device for pre-bending of the later to the slot tube to be formed sheet 5, namely a die 13, in which the still flat sheet 5 is pressed by means of a punch 11, so as to produce a pre-bend.
  • Fig. 8 also shows a cross-sectional view of a device for rounding the plate ends (sheet edges) of the later to be formed slot tube sheet 5 before rounding.
  • the sheet 5 rests here in his mitdeien area in the die 13, but stands with the plate ends up over.
  • the upwardly over the die 13 protruding plate ends can now be rounded to a certain radius, preferably the desired end radius of the (slot) tube by lateral bending cheeks ld are delivered against the sheet to be formed 5 in the region of its above the die protruding plate ends, being pivoted on the corresponding concave side of the sheet 5 bending cheeks 1, le (by appropriate pivoting), whereby the bending point controlled can be.
  • Fig. 9 finally shows the cross-sectional representation of a device for rounding the sheet ends (sheet edges) of the later to the slotted pipe to be formed sheet of FIG. 8 after the rounding of the sheet ends, including the pivotable bending beams 1, le - as can be seen here - upwards instead of being swiveled downwards.

Landscapes

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

Abstract

L'invention porte sur une plieuse possédant une mâchoire de pliage et/ou un ensemble de cylindres (1, 1a, 1b, 1c, 1d, 1e, 1g) destiné à transformer en un tube fendu une tôle (5) qui, pendant la transformation, est positionnée, du moins en partie, en un point fixe dans la direction horizontale - vu dans une coupe transversale à la direction longitudinale du tube fendu à former, ou entraînée en rotation. L'invention porte aussi sur l'utilisation d'une telle plieuse pour la fabrication de tubes à paroi épaisse et sur un procédé pour la transformation d'une tôle (5) en un tube fendu.
PCT/DE2012/000329 2011-04-05 2012-03-29 Plieuse pour tôle, utilisation d'une telle plieuse pour la fabrication de tube fendu et procédé de mise en forme d'une tôle pour former un tube fendu WO2012136187A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12717584.2A EP2694228B1 (fr) 2011-04-05 2012-03-29 Plieuse pour tôle, utilisation d'une telle plieuse pour la fabrication de tube fendu et procédé de mise en forme d'une tôle pour former un tube fendu

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011016173.2 2011-04-05
DE102011016173A DE102011016173A1 (de) 2011-04-05 2011-04-05 Blechbiegemaschine, Verwendung einer solchen zur Herstellung von Schlitzrohren sowie Verfahren zur Formung eines Bleches zu einem Schlitzrohr

Publications (1)

Publication Number Publication Date
WO2012136187A1 true WO2012136187A1 (fr) 2012-10-11

Family

ID=46021946

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2012/000329 WO2012136187A1 (fr) 2011-04-05 2012-03-29 Plieuse pour tôle, utilisation d'une telle plieuse pour la fabrication de tube fendu et procédé de mise en forme d'une tôle pour former un tube fendu

Country Status (3)

Country Link
EP (1) EP2694228B1 (fr)
DE (1) DE102011016173A1 (fr)
WO (1) WO2012136187A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016107298A (ja) * 2014-12-05 2016-06-20 Ｊｆｅスチール株式会社 高強度厚肉電縫鋼管の製造方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015210259B4 (de) * 2015-06-03 2016-12-15 Sms Group Gmbh Verfahren zum Herstellen von Schlitzrohren aus Blechtafeln
PL233983B1 (pl) * 2017-12-06 2019-12-31 Kapusta Lukasz Landoia Urządzenie do wytwarzania elementów kształtownikowych w rodzaju zamkniętych, podłużnych profili metalowych
DE102020215091A1 (de) 2020-12-01 2022-06-02 Sms Group Gmbh Verfahren zur Vorformung von Metallblech sowie Computerprogramm und Einrichtung zur Durchführung des Verfahrens

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB254066A (en) * 1925-05-20 1926-07-01 Hugo Junkers Improvements in and relating to the manufacture of sheet metal pipes
FR1296690A (fr) * 1961-05-10 1962-06-22 Babcock & Wilcox France Dispositif de manutention de tôles sur presses à cintrer
US3472053A (en) * 1967-02-10 1969-10-14 Yoder Co Tube mill
DE2529466A1 (de) * 1974-07-31 1976-02-19 Huette Krems Ges Mbh Krems Verfahren und vorrichtung zum herstellen von geschweissten rohren verschiedener dimensionen
FR2340779A2 (fr) 1976-02-12 1977-09-09 Mannesmann Ag Procede et dispositif pour le formage de bandes en vue de la fabrication de profiles fendus
JPS60238037A (ja) 1984-05-11 1985-11-26 Ishikawajima Harima Heavy Ind Co Ltd 成形機
US4706488A (en) 1984-05-16 1987-11-17 Kaiser Steel Corporation Method of roll forming cylindrical pipe
JPH03180212A (ja) 1989-12-06 1991-08-06 Kawasaki Steel Corp 溶接鋼管の製造装置
JPH04178221A (ja) 1990-11-08 1992-06-25 Nkk Corp 電縫鋼管の成形装置
DE9218263U1 (de) * 1992-11-18 1993-11-18 Schaefer Maschbau Wilhelm Vorrichtung zum Herstellen von Blechzylindern durch Gesenkbiegen
EP0607430A1 (fr) 1989-12-04 1994-07-27 Kawasaki Steel Corporation Appareil de fabrication de tubes en acier soude
WO2010118759A2 (fr) 2009-04-16 2010-10-21 Gmbh Siegen Bergrohr Presse à cintrer pour feuilles de tôle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743151C (de) * 1938-03-02 1943-12-18 Fritz Stiehl Dipl Ing Verfahren zur Herstellung von zylindrischen Schlitzrohren
DE1092865B (de) * 1959-03-06 1960-11-17 Mannesmann Ag Aus einer Mehrwalzenbiegemaschine und einer Abschneidevorrichtung bestehende Einrichtung zum intermittierenden Herstellen von Rohren
DE1103272B (de) * 1959-05-16 1961-03-30 Kocks Gmbh Friedrich Einrichtung zum Herstellen von Schraubennahtrohren
DE7305492U (de) * 1973-02-14 1976-10-28 Eisen- U. Metallwerke Ferndorf Gebr. Bender, 5910 Ferndorf Vorrichtung zum anbiegen der enden von blechen
DE2641573C3 (de) * 1976-09-13 1981-06-11 Mannesmann AG, 4000 Düsseldorf Blechbiegepresse

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB254066A (en) * 1925-05-20 1926-07-01 Hugo Junkers Improvements in and relating to the manufacture of sheet metal pipes
FR1296690A (fr) * 1961-05-10 1962-06-22 Babcock & Wilcox France Dispositif de manutention de tôles sur presses à cintrer
US3472053A (en) * 1967-02-10 1969-10-14 Yoder Co Tube mill
DE2529466A1 (de) * 1974-07-31 1976-02-19 Huette Krems Ges Mbh Krems Verfahren und vorrichtung zum herstellen von geschweissten rohren verschiedener dimensionen
FR2340779A2 (fr) 1976-02-12 1977-09-09 Mannesmann Ag Procede et dispositif pour le formage de bandes en vue de la fabrication de profiles fendus
JPS60238037A (ja) 1984-05-11 1985-11-26 Ishikawajima Harima Heavy Ind Co Ltd 成形機
US4706488A (en) 1984-05-16 1987-11-17 Kaiser Steel Corporation Method of roll forming cylindrical pipe
EP0607430A1 (fr) 1989-12-04 1994-07-27 Kawasaki Steel Corporation Appareil de fabrication de tubes en acier soude
JPH03180212A (ja) 1989-12-06 1991-08-06 Kawasaki Steel Corp 溶接鋼管の製造装置
JPH04178221A (ja) 1990-11-08 1992-06-25 Nkk Corp 電縫鋼管の成形装置
DE9218263U1 (de) * 1992-11-18 1993-11-18 Schaefer Maschbau Wilhelm Vorrichtung zum Herstellen von Blechzylindern durch Gesenkbiegen
WO2010118759A2 (fr) 2009-04-16 2010-10-21 Gmbh Siegen Bergrohr Presse à cintrer pour feuilles de tôle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016107298A (ja) * 2014-12-05 2016-06-20 Ｊｆｅスチール株式会社 高強度厚肉電縫鋼管の製造方法

Also Published As

Publication number Publication date
EP2694228A1 (fr) 2014-02-12
DE102011016173A1 (de) 2012-10-11
EP2694228B1 (fr) 2015-05-27

Similar Documents

Publication Publication Date Title
EP2529849B1 (fr) Dispositif et procédé de fabrication de tuyaux fendus à partir de plaques de tôle
DE102008050366B4 (de) System zum Kaltwalzprofilieren von Profilen mit veränderlichem Querschnitt
DE3529160C2 (fr)
EP0296317B1 (fr) Procédé et dispositif pour cintrer une tôle
DE102009025988A1 (de) Vorrichtung und Verfahren zum Freiformbiegen von Profilen
EP2694228B1 (fr) Plieuse pour tôle, utilisation d'une telle plieuse pour la fabrication de tube fendu et procédé de mise en forme d'une tôle pour former un tube fendu
DE102011053676B4 (de) Rohrbiegemaschine
DE102018211311B4 (de) Erweiterte Regelung JCO-Formpresse
EP2419227B1 (fr) Presse à cintrer pour feuilles de tôle
EP1914020A1 (fr) Dispositif de profilage pour une machine de profilage par laminage
DE19533618C2 (de) Verfahren zum Einformen von Schlitzrohren auf einer 3-Walzen-Biegemaschine
EP1466676B1 (fr) Procédé et appareil pour la fabrication d'un profilé métallique fermé ou d'un tube métallique ayant une paroi d'épaisseur variable dans le sens de sa longueur
DE102008055780A1 (de) Biegemaschine für Blechtafeln
DE2456782A1 (de) Verfahren und vorrichtung zum richten von profilstahl
EP0879102B1 (fr) Machine de cintrage circulaire des toles
DE3940984A1 (de) Verfahren und vorrichtung zum biegen von blechteilen zu schalen oder rohren (zentro-geometrisches-rollbiegeverfahren)
DE102020106664B4 (de) Verfahren und Vorrichtung zum Biegen von Profilen mit variablem Querschnitt
DE1959881A1 (de) Verfahren und Maschine zur vollautomatischen Herstellung von Federstiften mit wellenfoermigem Laengsschlitz
DE69926406T2 (de) Verfahren und vorrichtung zum rollformen von stahlrohren
DE102017115285A1 (de) Flexibles Falzwerkzeug
DE3939016A1 (de) Vorrichtung zum formen eines flansches oder dergleichen, insbesondere am ende eines duennwandigen metallrohres
DE102014009334A1 (de) PROFlLTRÄGER MlT ElNER ERHÖHTEN BlEGEFESTlGKElT AUS KALTBAND SOWlE VERFAHREN ZUR HERSTELLUNG ElNES SOLCHEN
DE19963056C2 (de) Verfahren und Vorrichtung zum mehrstufigen Umformen eines Rohres
EP3851221A1 (fr) Machine à cintrer
DE1811980A1 (de) Vorrichtung zum Anbiegen von Blechraendern fuer die Herstellung von Rohren,Kesselmaenteln od.dgl.

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12717584

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2012717584

Country of ref document: EP

WD Withdrawal of designations after international publication

Designated state(s): DE