EP3233322A1 - Machine à cintrer pour le cintrage de tubes, de sections profilées, de tôles et similaires, dotée d'un système pour la mesure de la force de réaction appliquée par la pièce sur le ou les rouleau(x) de cintrage de la machine - Google Patents

Machine à cintrer pour le cintrage de tubes, de sections profilées, de tôles et similaires, dotée d'un système pour la mesure de la force de réaction appliquée par la pièce sur le ou les rouleau(x) de cintrage de la machine

Info

Publication number
EP3233322A1
EP3233322A1 EP15823786.7A EP15823786A EP3233322A1 EP 3233322 A1 EP3233322 A1 EP 3233322A1 EP 15823786 A EP15823786 A EP 15823786A EP 3233322 A1 EP3233322 A1 EP 3233322A1
Authority
EP
European Patent Office
Prior art keywords
bending
rotation
roller
machine
rollers
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.)
Withdrawn
Application number
EP15823786.7A
Other languages
German (de)
English (en)
Inventor
Mauro Meliga
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP3233322A1 publication Critical patent/EP3233322A1/fr
Withdrawn legal-status Critical Current

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
    • B21D5/06—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
    • 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
    • B21D5/002—Positioning devices
    • 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
    • B21D5/004—Bending sheet metal along straight lines, e.g. to form simple curves with program control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers
    • 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/12—Bending rods, profiles, or tubes with programme control
    • 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
    • B21D7/14—Bending rods, profiles, or tubes combined with measuring of bends or lengths

Definitions

  • the present invention relates to a bending machine for bending tubes, profiled sections, sheets and the like, of the type comprising three bending rollers arranged with their axes parallel to each other, the rollers being movable relative to each other to cause the material to be bent (be it a tube, a profiled section or a sheet) to move, passing through the bending rollers, along a curved path having the desired bending radius.
  • the three bending rollers are normally driven into rotation at the same angular speed, each about its axis of rotation coinciding with its geometric axis. It is however known to drive into rotation only one or two of the three bending rollers.
  • the relative position of the three bending rollers can be adjusted according to one of the following three modes: pyramidal mode, pyramidal mode with adjustable centre to centre distance and double independent adjustment mode.
  • pyramidal adjustment mode the two side bending rollers are stationary while the middle bending roller is movable, normally in the vertical direction, towards or away from an axis passing through the centres of the two side bending rollers.
  • the pyramidal adjustment mode with adjustable centre to centre distance in addition to the vertical movement of the middle bending roller there is allowed the movement of the two side bending rollers along the axis passing through their centres, which enables to adjust also the centre to centre distance of the two side bending rollers, in addition to adjusting the distance of the centre of the middle roller from the axis passing through the centres of the two side bending rollers.
  • the middle bending roller is stationary while the two side bending rollers are mounted on straight slides or tilting levers so that the axes of the two side bending rollers are movable along respective straight or curved paths.
  • the principle on which the operation of a bending machine of the above-identified type is based is that adjusting the relative position of the three bending rollers allows to adjust the interference with which the work- piece to be bent passes between the bending rollers, and therefore to adjust also the result- ing bending radius.
  • the invention is based on the idea of providing at least one of the bending rollers with a force measuring device arranged to measure the reaction force applied by the work- piece on that roller.
  • a force measuring device arranged to measure the reaction force applied by the work- piece on that roller.
  • the use of one or more force measuring devices associated to one or more bending rollers of the bending machine makes it possible to control the reaction force applied by the workpiece on that roller(s) and, based on the information thus obtained, to adjust in micrometric manner the position of one or more bending rollers to compensate for possible differences in the bending radiuses due to differences in the mechanical properties of the workpieces.
  • Figures 1 and 2 are a front view and a side view, respectively, of a bending machine according to the present invention
  • Figure 3 is an exploded view of an adjustment mechanism for adjusting the position of the middle roller, which mechanism can be used on a bending machine according to the invention.
  • Figure 4 schematically shows the principle of operation of the bending machine of
  • a bending machine according to an embodiment of the present invention is generally indicated 10. More specifically, the bending machine illustrated in Figures 1 and 2 is designed to bend tubes and profiled sections. The invention is however applicable also to bending machines designed to bend sheets.
  • the bending raa- chine 10 comprises three bending rollers, namely a first bending roller (or middle bending roller) 12, whose axis of rotation is indicated X
  • , x 2 and x 3 of the three bending rollers 12, 14 and 16 extend horizontally and are parallel to each other.
  • the middle bending roller 12 is adjustable, in that its axis of rotation xi can be moved along an adjustment direction z, which is preferably a vertical direction.
  • the axes of rotation x 2 and x 3 of the two side bending rollers 14 and 16 are vertically aligned, in that they lie in a same horizontal plane.
  • the two side bending rollers 14 and 16 are stationary, i.e. the position of their axes of rotation x 2 and x 3 is fixed.
  • the two side bending rollers 14 and 16 might however be adjustable, in that their axes of rotation x 2 and x 3 might be horizontally movable towards or away from each other in order to allow to change the distance between the centres of these rollers.
  • the bending machine 10 further comprises a motor unit arranged to drive the three bending rollers 12, 14 and 16 to rotate at the same angular speed about the respective axes of rotation xi, x 2 and x 3 .
  • the motor unit comprises an electric motor 18, which drives three cardan shafts 24 (only two of which are shown in Figure 2) to rotate at the same angular speed through an angle .
  • gear 20 and a gear set 22 each of the cardan shafts being coupled at an end thereof to a respective shaft 26 on which a respective bending roller 12, 14 or 16 is mounted so as to be drivingly connected for rotation therewith.
  • the motor unit might also be different from the one shown in the drawings.
  • the bending machine 10 further comprises an adjustment mechanism arranged to adjust the position of the axis of rotation xi of the middle bending roller 12 along the adjustment direction z (in the present case a vertical direction).
  • the adjustment mechanism comprises an electric motor 34 which is arranged above the axis of rotation X
  • FIG 3 shows in detail another embodiment of an adjustment mechanism associated to the middle bending roller 12, according to which the electric motor 34 controlling the movement of the axis of rotation X
  • the adjustment mechanism comprises a linear actuator 28 operatively connected, through a transmission member 38 which is made for example as a rod, to a carriage 30 which is mounted on a support plate 32 so as to be slidable in the adjustment direction z (in the present case, a vertical direction) and rotatably supports the shaft 26 and the respective middle bending roller 12.
  • the linear actuator 28 is controlled by the electric motor 34.
  • control of the linear actuator 28 by means of the electric motor 34 enables to make the carriage 30 slide vertically and hence to change the vertical position of the axis of rotation X
  • the transmission member 38 works by pulling the carriage 30 downwards, against the reaction force which is applied by the workpiece on the middle bending roller 12, and hence on the carriage 30, and is directed upwards, and is thus loaded under traction.
  • the adjustment mechanism associated to the middle bending roller 12 might have a configuration other than the one proposed herein.
  • a force measuring device 36 arranged to measure the reaction force applied by the work- piece on that roller, and therefore to measure the force applied by that roller on the work- piece, is associated to the middle bending roller 12.
  • the force measuring device 36 is a load cell and is mounted between the free end (upper end) of the transmission member 38 of the linear actuator 28 and the carriage 30, in such a manner that the reaction force applied by the workpiece on the middle bending roller 12 is discharged on the carriage 30 and from the latter to the transmission member 38 via the force measuring device 36.
  • the force measuring device 36 (load cell) works under traction, since the associated transmission member 38 is subject to a traction load.
  • the force measuring device works under compression, as the associated transmission member is subject to a compression load.
  • the force measuring device 36 is connected, in a manner that is not shown but is however of per-se-known type, to an electronic control unit of the machine (also not shown) so as to transmit to the latter a signal indicative of the measured reaction force.
  • the electronic control unit of the machine is thus able to control the reaction force applied by the workpiece on the middle bending roller 12 and, if necessary, to suitably adjust, based on this information, the position of the axis of rotation xi of this roller.
  • Similar force measuring devices may be associated also to the two side bending rollers 14 and 16 to allow the electronic control unit of the machine to control the reaction forces applied by the workpiece on these two rollers as well.
  • FIG 4 schematically shows the principle of operation of the bending machine 10 described above.
  • the workpiece (indicated P) is bent while passing through the three bending rollers 12, 14 and 16.
  • the workpiece P applies on the middle bending roller 12 a reaction force (indicated R) which is measured by the force measuring device 36 associated to this roller, which force measuring device is preferably interposed between a support element (for example the carriage 30) for supporting the roller 12 and the free end of the transmission member 38 through which the electric motor 34 (here not shown) adjusts the position of the axis of rotation xi of the roller 12.
  • a support element for example the carriage 30
  • the electric motor 34 here not shown
  • the bending machine according to the invention is described and illustrated herein with reference to its application to the bending of tubes and profiled sections, it is also applicable to the bending of sheets.
  • a bending machine for bending sheets only the shape of the rollers and the way they are supported will be different.
  • the rollers in fact, will have a length (axial size) larger than that of rollers designed for the bending of profiled sections and will have to be supported at both their axial ends.

Landscapes

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

Abstract

L'invention concerne une machine comprenant trois rouleaux de cintrage (12, 14, 16) supportés en rotation autour d'axes de rotation respectifs (x1, x2, x3), des moyens moteurs (18, 20, 22, 24) pour l'entraînement des rouleaux de cintrage (12, 14, 16) en rotation autour des axes de rotation respectifs (x1, x2, x3), des moyens d'ajustement (28, 34, 38) pour l'ajustement de la position d'au moins l'un (x1) des axes de rotation (x1, x2, x3) pour ajuster le rayon de courbure d'une pièce (P) à cintrer et des moyens de mesure de force (36) associés à au moins l'un (12) des trois rouleaux de cintrage (12, 14, 16) pour mesurer la force de réaction (R) appliquée par la pièce (P) sur ledit ou lesdits rouleau(x) (12).
EP15823786.7A 2014-12-15 2015-12-15 Machine à cintrer pour le cintrage de tubes, de sections profilées, de tôles et similaires, dotée d'un système pour la mesure de la force de réaction appliquée par la pièce sur le ou les rouleau(x) de cintrage de la machine Withdrawn EP3233322A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO20141036 2014-12-15
PCT/IB2015/059615 WO2016097984A1 (fr) 2014-12-15 2015-12-15 Machine à cintrer pour le cintrage de tubes, de sections profilées, de tôles et similaires, dotée d'un système pour la mesure de la force de réaction appliquée par la pièce sur le ou les rouleau(x) de cintrage de la machine

Publications (1)

Publication Number Publication Date
EP3233322A1 true EP3233322A1 (fr) 2017-10-25

Family

ID=52464511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15823786.7A Withdrawn EP3233322A1 (fr) 2014-12-15 2015-12-15 Machine à cintrer pour le cintrage de tubes, de sections profilées, de tôles et similaires, dotée d'un système pour la mesure de la force de réaction appliquée par la pièce sur le ou les rouleau(x) de cintrage de la machine

Country Status (2)

Country Link
EP (1) EP3233322A1 (fr)
WO (1) WO2016097984A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111992599A (zh) * 2020-10-29 2020-11-27 江苏金汇铝板带有限公司 一种铝板生产用扇面弧条成型装置及成型方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106077181A (zh) * 2016-08-12 2016-11-09 长兴正贸物流设备有限公司 一种直板折弯机
DE102018211311B4 (de) * 2018-07-09 2020-03-26 Sms Group Gmbh Erweiterte Regelung JCO-Formpresse
CN111687247B (zh) * 2020-06-16 2022-07-22 通裕重工股份有限公司 一种适用于自动卷板机的控制方法及装置
IT202000015970A1 (it) * 2020-07-02 2022-01-02 Cte Sistemi Srl Metodo per controllare un processo di piegatura a rulli di un profilato
JP7449343B1 (ja) 2022-08-25 2024-03-13 株式会社栗本鐵工所 ベンディングロール

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
DE1085839B (de) * 1959-02-09 1960-07-28 Berg Roehrenwerk Geb Verfahren zum Biegen von staerkeren Blech-, insbesondere Stahlblechplatten, zu laengsgeschlitzten Hohlkoerpern, z. B. Rohren, und Vorrichtung zur Durchfuehrung des Verfahrens
DE3416133A1 (de) * 1984-05-02 1985-11-07 Bernd 7530 Pforzheim Schüssler Vorrichtung zum biegen von rohr- oder strangfoermigem material, insbesondere draht
GB8607806D0 (en) * 1986-03-27 1986-04-30 Caledonian Mining Co Ltd Drive system
IT1296576B1 (it) * 1997-11-27 1999-07-14 Promau Srl Apparecchiatura automatica per la curvatura di lamiere, con controllo selettivo digitale
TW449509B (en) * 1998-11-04 2001-08-11 Kawasaki Steel Co Bending rolls, and pipe formed thereby

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111992599A (zh) * 2020-10-29 2020-11-27 江苏金汇铝板带有限公司 一种铝板生产用扇面弧条成型装置及成型方法

Also Published As

Publication number Publication date
WO2016097984A1 (fr) 2016-06-23

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