EP3842163B1 - Machine et procede de cintrage - Google Patents

Machine et procede de cintrage Download PDF

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Publication number
EP3842163B1
EP3842163B1 EP20212856.7A EP20212856A EP3842163B1 EP 3842163 B1 EP3842163 B1 EP 3842163B1 EP 20212856 A EP20212856 A EP 20212856A EP 3842163 B1 EP3842163 B1 EP 3842163B1
Authority
EP
European Patent Office
Prior art keywords
bending
holder
mors
bent
workpiece
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.)
Active
Application number
EP20212856.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3842163A1 (fr
Inventor
Jean-Paul Bruyas
Joël ETIENNE
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.)
Numalliance SAS
Original Assignee
Numalliance SAS
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Filing date
Publication date
Application filed by Numalliance SAS filed Critical Numalliance SAS
Publication of EP3842163A1 publication Critical patent/EP3842163A1/fr
Application granted granted Critical
Publication of EP3842163B1 publication Critical patent/EP3842163B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/003—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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends

Definitions

  • the invention relates to the field of bending machines and in particular to adaptations making it possible to change the direction of bending under the best conditions.
  • This document describes a machine for bending tubes comprising a fixed frame provided, along its longitudinal axis, with a guide rail on which slides a movable carriage integral with a barrel allowing, by means of an internal clamping chuck, the guiding and immobilization in rotation and in translation of a tube to be bent, at one of its ends a bending head, a bending roller and a bending arm which pivots around the vertical axis of the bending for the formation of the tube.
  • This machine was characterized in that it included:
  • a bending arm provided with a jaw support which moves horizontally in the direction of the bending head, said jaw support being integral with a clamping jaw which comprises at least one jaw for bending in a clockwise direction of the tube and at least one jaw for bending in a counterclockwise direction of the tube, said jaws being fixed to each other,
  • a bending roller which is fixed on the bending arm and which comprises at least one jaw for bending in a clockwise direction of the tube and at least one jaw for bending in a counterclockwise direction of the tube, said jaws being offset laterally relative to each other and on either side of the vertical axis of the bending head,
  • a first strip support which comprises at least one jaw, for the tight accompaniment of the tube during its bending in a clockwise direction
  • a second strip support which comprises at least one jaw for the tight accompaniment of the tube during its bending in a counterclockwise direction.
  • the bending arm rotates from 0° to 180° or from 180° to 0°.
  • a more general goal of this research is to free up as much space as possible to allow unhindered bending.
  • the translation guidance makes it possible to bring the jaw closer and further away from the jaw fitted to the roller in order to tighten and loosen the part portion to be bent.
  • the disassembly of the jaw support allows not only the replacement of the jaws but also the displacement of the jaw in its initial orientation when the arm changes position during the change of direction of the bending.
  • the change in position of the arm during the change of bending direction results in a symmetrical arrangement of the jaw support with respect to the bending axis. If this bending position does not correspond to the bending range, the disassembly of the jaw support makes it possible, for example, to keep the first orientation of the jaws and thus to use the jaw placed on the back of the first for the next bending operation .
  • This characteristic is therefore particularly advantageous in that it proposes to occasionally release the jaw support from the bending arm and then to reassociate them once the bending arm is in the new starting position.
  • This characteristic also allows the use of different clamping jaws predisposed according to the direction of bending to be carried out.
  • the point fixing can be implemented by any means of attachment controlled by a direct command or by the movements of the various sub-assemblies.
  • This movement can facilitate the change of the jaw support but it has the other advantage of offering a means of movement to the jaw support while respecting its initial orientation in order to implement the jaw placed on the back of the jaw used in the bending phase former. It allows repositioning at the zero point of the stroke without requiring movement of the tablet relative to the arm.
  • This characteristic is also particularly advantageous in that it offers, at the level of the bending head, the transverse mobility (relative to the axis of advance of the part to be bent) on the one hand of the support of strips supporting at least two strips each oriented for a different direction of bending and on the other hand of the roller and bending arm assembly.
  • the addition of mobilities makes it possible to reposition the roller and arm assembly and the strip support relative to the part to be bent (repositioning necessary when bending direction changes) by reducing the length of the strokes necessary to this repositioning.
  • the bending head can thus be less bulky and propose that the bending can be carried out by positioning the roller and arm assembly at the end of its travel where neither the bending head itself nor the guide means of the strip support (or the strip support itself) prevent rotation beyond 180 degrees.
  • the bending head is more compact and more rigid.
  • the bending capacities of a bending machine according to the invention are thus increased in angular span, in stress to be exerted and supported and in precision.
  • said point fixing means comprise male or female shapes equipping the strip support and cooperating with corresponding female or male shapes preformed in the jaw support for reception and displacement purposes. of the jaw support on either side of the bending axis.
  • said jaw support is equipped with male or female shapes cooperating with corresponding female or male shapes equipping said shelf.
  • said jaw support is equipped with preformed male cylindrical projections of flats cooperating with buttonhole-shaped orifices associating a large-diameter hole with a smaller and oblong hole in order to retain the support bit or release it according to the position of its projections in said buttonhole orifices.
  • the part to be bent is brought to the bending head by means of a carriage guided and driven in translation on the frame parallel to the axis of the part to be bent.
  • the bending arm associated with the bending roller is driven and guided in translation on the bending head transversely to the axis of advance of the part to be bent and parallel to the transverse displacement of the ruler support.
  • the various controlled movements of the various sub-assemblies allow the movements necessary for the automatic assembly/disassembly operations of the jaw support not only with the support of strips but also with the shelf integral with the arm.
  • the jaw support can thus be mounted either on one side or on the other side with respect to the bending axis in a bending machine.
  • This new principle is much more rigid and will be able to apply to small tubes but also to large tubes. Such a solution is particularly suited to the needs of users in that many of them make very little use of right and left bending on the same part. Versatility is sought for a bender that can bend right or left or occasionally right and left.
  • the invention makes it possible for these three operating modes to work in good conditions and to pass from one mode to another without human intervention.
  • the bending machine referenced M as a whole comprises a fixed frame 100 on the upper surface 110 of which slides according to the double arrow F1 a mobile carriage 200 equipped with a carriage shaft 210 in which is placed the part to be bent 300 (here a tube).
  • This shaft 210 allows, via an internal chuck, the guiding and immobilization in rotation and in translation of said tube 300. It also defines the axis of advance of the tube.
  • the bending arm 500 is equipped with a jaw support 510 which moves horizontally in translation according to the double arrow F3. It approaches in the direction of the bending roller 410 which is preformed with a jaw to clamp a portion of the tube 300 between them.
  • the strip support 600 is movable in translation along the double arrow F4.
  • the bending head 400 is designed to implement a plurality of additional movements.
  • the implementation of a translational movement on an axis is carried out by pairs of rails possibly associated with a crossed shelf for an associated perpendicular translational movement.
  • the bending head 400 of the invention is very compact.
  • the bending arm, the tube 300 and the rollers are arranged so that counterclockwise bending can take place.
  • a portion of tube 300 is clamped between roller 410 and jaw 511.
  • Ruler 601 is in contact with tube 300.
  • the bending arm 500 starts a counterclockwise rotation according to the arrow F5 around the Y axis of the rollers.
  • the tablet support 600 accompanies the tube 300 with a translation parallel to the axis of the tube 300 according to the arrow F6.
  • the jaw support 510 moves away from the roller 410 and the bending arm 500 returns to its starting position.
  • the jaw support 510 is positioned relative to the slider support 600 so that the jaw support 510 is fixed punctually to the slider support 600 and separates from the tablet 513 of the arm 500 as illustrated by the figure 4 .
  • the jaw support 510 is fixed in a removable manner to a shelf 513 guided and driven in translation on the bending arm 500 and the strip support 600 comprises means for gripping and/or receiving the jaw support 510.
  • this fixing can be implemented by clamping the jaw support on the tablet of the buttonhole type moved pneumatically.
  • An example is illustrated by the figure 10 and 11 .
  • said jaw support 510 is equipped with male shapes cooperating with corresponding female shapes equipping said shelf 513. More specifically, said jaw support 510 is equipped with male cylindrical projections 514 preformed with flats 515 cooperating with orifices 516 in buttonhole shape combining a large-diameter hole with a smaller, oblong hole in order to retain the jaw support or release it depending on the position of its projections in said buttonhole orifices.
  • said point fixing means comprise male or female forms fitted to the strip support 600 and cooperating with corresponding female or male forms preformed in the jaw support 510 for the purposes of receiving and moving the support of jaws 510 on either side of the bending axis.
  • this attachment can be implemented by 2 axes which come out pneumatically from said fixed part and which hold the jaw support 510 in position during the lateral displacement of the strip support 600.
  • Another solution is a magnetic solution .
  • the bending head 400 is lowered beforehand relative to the tube 300 to allow the movements of the next phase preparatory to the next bending to be carried out in a clockwise direction.
  • the slider support 600 with the jaw support 510 fixed thereon is moved in translation according to the arrow F7 to move it to the other side of the axis of advance of the tube 300 for on the one hand to arrange the slider 602 in the working position but also to move the jaw support 510 in its starting orientation without inverting its position to operate the jaw 512.
  • the arm and roller assembly is moved in translation according to arrow F8 and arrow F9 to pass to the other side of the axis of advance of the tube 300.
  • the arm 500 is positioned by turning according to the arrow F10, in the starting position for bending in the clockwise direction.
  • the shelf 513 then moves into position along the arm 500 to be below the jaw support 510 carried by the strip support 600.
  • the arm and roller assembly rises in translation according to the arrow F11 to allow the attachment of the jaw support 510 to the tablet 513 and the separation between the jaw support 510 and the strip support 600.
  • This movement also makes it possible to the correct height of the roller 420 which will be used for bending in a clockwise direction.
  • jaw support 510 is moved in translation along arrow F12 along arm 500 to clamp the tube portion 300 to be bent between roller 420 and jaw 512.
  • strip support 600 is moved in translation along the arrow F13 on the bending head 400 so that the strip 602 comes into contact with the tube 300 and accompanies it for bending.
  • the figure 9 illustrates clockwise bending according to arrow F14.
  • the figure 9 illustrates well the increased angular possibilities of the bending machine of the invention which, by the increased capacities of movement of its different sub-assemblies can position the arm and roller assembly at the end of the transverse translation stroke. This positioning ensures that no obstacle opposes a rotation of the arm 500 according to the arrow F14 going beyond 180 degrees.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP20212856.7A 2019-12-23 2020-12-09 Machine et procede de cintrage Active EP3842163B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1915509A FR3105034B1 (fr) 2019-12-23 2019-12-23 Machine et procédé de cintrage

Publications (2)

Publication Number Publication Date
EP3842163A1 EP3842163A1 (fr) 2021-06-30
EP3842163B1 true EP3842163B1 (fr) 2022-03-02

Family

ID=69811356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20212856.7A Active EP3842163B1 (fr) 2019-12-23 2020-12-09 Machine et procede de cintrage

Country Status (5)

Country Link
US (1) US11331708B2 (pt)
EP (1) EP3842163B1 (pt)
CN (1) CN113083960A (pt)
FR (1) FR3105034B1 (pt)
PT (1) PT3842163T (pt)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114226517B (zh) * 2021-12-23 2024-04-02 马鞍山市三川机械制造有限公司 一种汽车排气管加工用弯管机
CN117816797A (zh) * 2024-03-05 2024-04-05 赣州木昇家具有限公司 一种金属家具零配件加工用可调角式折弯装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3901751A1 (de) * 1989-01-21 1990-07-26 Luhn & Pulvermacher Gmbh & Co Biegemaschine fuer blattfedern
US5343725A (en) * 1993-07-07 1994-09-06 Eagle Precision Technologies Inc. Tube bending apparatus and method
JP3733176B2 (ja) * 1996-07-10 2006-01-11 株式会社オプトン 曲げ加工装置
FR2833868B1 (fr) 2001-12-20 2004-03-05 Silfax Machine a cintrer les tubes et son dispositif de cintrage a gauche et/ou a droite
DE502004007277D1 (de) * 2004-03-26 2008-07-10 Wafios Ag Biegevorrichtung für stab- und rohrförmige Werkstücke
FR2915410B1 (fr) * 2007-04-24 2009-06-12 Jaubjaub Consulting Sarl Machine a cintrer un profile selon deux sens de cintrage.
ATE528082T1 (de) * 2009-01-16 2011-10-15 Wafios Ag Rotationszugbiegewerkzeug mit exzenterklemmung

Also Published As

Publication number Publication date
EP3842163A1 (fr) 2021-06-30
CN113083960A (zh) 2021-07-09
PT3842163T (pt) 2022-04-11
US20210187573A1 (en) 2021-06-24
US11331708B2 (en) 2022-05-17
FR3105034B1 (fr) 2021-11-19
FR3105034A1 (fr) 2021-06-25

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