EP3389889A2 - Machine multifonctionnelle de pliage à la presse - Google Patents

Machine multifonctionnelle de pliage à la presse

Info

Publication number
EP3389889A2
EP3389889A2 EP16813040.9A EP16813040A EP3389889A2 EP 3389889 A2 EP3389889 A2 EP 3389889A2 EP 16813040 A EP16813040 A EP 16813040A EP 3389889 A2 EP3389889 A2 EP 3389889A2
Authority
EP
European Patent Office
Prior art keywords
machine
rollers
order
sheet
machine according
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Withdrawn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
EP16813040.9A
Other languages
German (de)
English (en)
Inventor
Roberto DALL'ARCHE
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.)
Tecnoma Automazioni Industriali Srl
Original Assignee
Tecnoma Automazioni Industriali Srl
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 Tecnoma Automazioni Industriali Srl filed Critical Tecnoma Automazioni Industriali Srl
Publication of EP3389889A2 publication Critical patent/EP3389889A2/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Withdrawn legal-status Critical Current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
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/10—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
    • B21D5/12—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 making use of forming-rollers

Definitions

  • the subject of this invention is a combined multifunction machine, adapted to perform bends and/or longitudinal counter- bends with continuous variable radius, folds and/or tilted counter-folds, folded and flattened edges, and sheet metal tubes and spirals in a single structure.
  • a distinctive feature of the machine in question is that the processing steps take place in a programmable manner by means of a numerical controller, simultaneously all along the edge of the strip and in progressive sequences until completion of the product.
  • the invention intends to create a machine capable of producing consistent products in shaped sheet metal profiles in various lengths and thicknesses, of different materials, in different sizes, and in mixed shapes such as straight, curved and counter-curves, arcs, parabolas, in angles from zero to one hundred thirty-five degrees, with edges and counter-edges, edges folded back in hemming, spirals both on the outside edges and inside along the strip, and in progressive sequential steps without replacing and manual adjusting the tools.
  • This factor allows the company using it to distribute the initial investment cost over the entire range of products that can be created, as well as the opportunity to add new items to the production cycle in the future using the same device.
  • the one used most for making folds is the pressing-bending machine, which bases its principle of operation referred to as "coining”, where a shaped blade presses the sheet and pushes it inside a hollow of suitable dimensions and shapes based on the thickness of the sheet and the shape of the sheet you want to create.
  • These pressing-bending machines create the folds simultaneously along the entire length of the edge.
  • These machines can be operated mechanically by means of kinematic mechanisms, electrically using screw and lead screw jacks and with one or more standards or more commonly by means of hydraulic jacks.
  • These types of folding machines can fold both thin and thick sheets. They are machines that can be run by a human operator who oversees the proper positioning of the sheet metal in the positions in which it must be folded or be run by automatic systems such as robots, positioners, etc. To perform a counter-fold with this type of machine, the strip to be worked must be extracted from the bending zone, inverted and reinserted in the machine and repositioned at the position of the counter-fold.
  • tilt machine Another type of bending machine, called a “tilt” machine, that is suitable to bend thin sheet metal, is operated either manually, for short lengths, or mechanically, electrically, and more commonly using hydraulic linear actuators operating levers distributed along the entire machine in order to distribute the stress along the entire flap, and is able to transform its linear motion into rotary motion.
  • a peculiar characteristic of these machines is that they rotate the sheet against an edge in order to obtain a bend based on the desired angle, but that presents the part of the sheet metal flap that is yet to be bent, pressed against and parallel to the surface of the machine, ready to be moved beyond the edge-presser and be folded again.
  • This type of machine can be equipped with positioning pliers which maintain a constant grip on the sheet, and thus the units of measure and move it toward the flap, thus automatically performing folds in sequence. Even this type of machine has the drawback of not being able to perform counter-folds in automatic sequences. Also, with this type of machine the sheet metal must be pulled out, turned over and again re-inserted and repositioned manually.
  • the flap bender in which the folding function is entrusted to a slide that by moves obliquely, pushes the sheet against the presser profile and as a function of its advancement determines the angle of the fold. The drawback of this system is that it produces a sliding friction against the sheet, ruining the surface.
  • the current state of the art indicates multiple sheet metal bending and/or deformation systems, such as moulding, for example, where the sheet metal is pushed and pressed against the walls of the matrix by means of a counter- matrix driven by a machine adapted to exert a suitable pressure (press) .
  • a suitable pressure press
  • the shapes and dimensions of the product are determined and predefined by the shape of the mould.
  • "Panelling" machines are also widespread in the production system. They are able to fold strips on all sides. These machines are usually automatic. That is, they rotate the side to be bent towards the bending tool in a predetermined sequence in order to produce predominantly square and/or rectangular shapes with the edges folded to form a "box".
  • the method commonly called the three pyramidal roller method, with two or three feed rollers, where the two lower rollers have fixed axes and the third roller is located equidistant between the two and moves only along its vertical axis according to the distance between the two lower rollers and determines the bending radius of the sheet metal is the most simple, common, and less expensive method in terms of initial investment but it has the serious drawback of presenting a straight part on the leading and trailing edges, which must later be refinished.
  • bending machine manufacturers have developed different types of calenders such as the three-roller variable axis calender, which is characterized by the vertical movement of the upper roller and the horizontal one of the two lower rollers, which when moving forward and backward behave as a press and can thus perform the pre-curvature (call) to the edges at the beginning and end and then perform the curvature of the sheet, finishing the piece.
  • This is a system suitable for calendering thick plates.
  • the upper roller has a fixed axis and the lower rollers move both horizontally and vertically. In this way they are able to perform the call (pre-bend) along the longitudinal edges and then perform the shell bend in a single pass.
  • the asymmetric three-roll calenders are suitable for the processing of light and medium thicknesses. These machines are used in aluminium processing, industrial bodywork and generally in laboratories and small metal processing industries. They have two opposing feed rollers and the third roller, usually idle, moves vertically at the exit of the rollers and determines the bending radius of the sheet. All these bending systems (calenders) can perform bends in one direction only. To perform more complex profiles, folds and counter-folds, bends and counter-bends, tubes, spirals, and parabolas, in all shapes and combinations, the present state of the art indicates the best solution applied in profiling machines. They are high- productivity machines capable of performing very complex profiles.
  • Fig 1 a compact structure
  • Fig 1 composed of load-bearing parts made of sheet steel in a suitable amount and thickness depending on the length of the different models, is suitably shaped (Fig 1, a - Fig . 12, a), integrally joined by tubular longitudinal pieces (Fig 1, b - Fig. 12, b) electro-welded together (Fig 1, c - Fig. 12, c) and subsequently machined with chip removal machine tools to order to ensure dimensionality, flatness, squareness and precision in the points where the various components are positioned integrally with the fastening elements (bolts, screws, plugs, etc. ) .
  • the machine is equipped with a recess (Fig 1, d - Figure 12, d) inside which is placed a roller conveyor (Fig 1, e, - Fig. 3-4, e - Fig 12, e) above which the sheet metal to be worked is laterally inserted (Fig. 2, f) .
  • a roller conveyor Fig 1, e, - Fig. 3-4, e - Fig 12, e
  • Fig. 2, f a roller conveyor
  • Fig. 2, f a roller conveyor
  • grippers fig. 3, g
  • a sliding structure by means of recirculating ball guides (fig. n. 3-4-5, h) able to move both laterally and longitudinally and also asynchronous to each other (fig. 5 - 5, i) , which, being equipped with rotary jaws (fig. no. 5, 1), are arranged to position the strip in the various stages of processing described below.
  • the machine is equipped with a bending device composed of two prisms with protruding profiles (blades) (Fig 1, ml, m2 -, Fig. 16, ml, m2), arranged along the front side of the machine and their length determines the working capacity.
  • These profiles (prisms) also clamp onto the sheet metal during the bending since the upper prism (Fig 1, ml -, fig. 16, ml) is built into a carriage operated by linear hydraulic actuators (Fig 1, n, fig. n. 12-16-17, n) , The carriage slides on linear recirculating ball guides (Fig 1, o, Fig. 12-16-17, o) , that are appropriately sized for accurate and controlled vertical movement (fig 12-16, pi - fig.
  • n. 17, p2 orthogonal to the fixed part of the machine bottom (fig 12, p3) .
  • These blades (prisms) have a triangular profile tapered along their length whose angle is 135 degrees. This corresponds to the maximum value of the sheet bending angles that can be executed as they determine its internal profile since the edge of the prism has the function of "containment" and contrast the tilting action, one lower (Fig 1. ql -, fig. n. 12th - 13th - 17 - 18 - 19 ql ) , and one upper (Fig 1, q2 - , Fig. 12 - 13 -14 - 15, q2 ) .
  • flaps are built into retractable slides so they independently move in the fold position, actuated by hydraulic linear actuators operating the lower flap (fig. n. 16-17, rl) and (Fig. 12 -13, r2 ) the upper one.
  • the flap doors When moved into the bending position, the flap doors rotate about an axis which corresponds to the edge of the folding prisms which are tightened, preventing the sheet from moving (Fig. No. 18-19, ml, m2 -, fig. N. 22-23, ml, ⁇ 2).
  • These flaps are actuated by linear hydraulic actuators (Fig. 16-17-18-19, si, fig. No. 22-23, si) which transmit the rotary motion through a system of parallelogram levers (FIG.
  • the machine referred to in question is also equipped with a calendering (bending) device adapted to perform curves, v- curves, arcs, spirals, parabolas, cones, arcs with continuously varying radius, etc.
  • This device is made up of four rollers (Fig 1, vl, v2, v3, v4 , Fig. No.
  • rollers are on supports (Fig 1, zl, z4, Fig. 20, zl, z2, z3, z4, fig. No. 24, zl, z4 - fig. No.
  • This calendering device is commonly defined in the present state of the art as an "asymmetric calender" in which the sheet metal (Fig. 38, f) is moved and inserted between the first two rollers (fig. n. 20-21, v2, v3, fig. no. 38-39, v2, v3)), by grippers (fig. n. 20-21, 1, fig.
  • the action of deformation (curvature) of the sheet is carried out by the lower outer roller (fig. no. 20-21, v4 -Fig. 38, v4, fl) if the curvature is directed upwards, while for a downward curve, the lower roller will be set back (fig. no. 39, v4) and the upper roller will be positioned in the calendering zone, (fig. 39, vl, f2) and performs the curvature.
  • the rollers are located in the machine in such a way as to be retractable, handled independently, moving on slides with recirculating balls, inside and outside of the machine.
  • the lower inner roller on the stand (fig. 23, z3) and operated by hydraulic linear actuators (Fig. No.
  • the external asymmetric rollers are positioned on the lower (ql) and upper (q2) flaps whose supports are built-in using sliding guides with a central pivot (j) which allows them to rotate while tilting (fig. N. 25-26) . They are moved at different heights from each other by the actuators (fig. 25, Y1A, Y1B - fig. n.
  • This function is made possible by setting the cycles for the handling of components in the program of the CNC (numerical control) .
  • the sheet after notching the corners (Fig. No. 7, f5g) , is inserted between the gripping pliers (Fig. No. 7, gl, g2) and given the start to the sequence of handling cycles.
  • the sheet is inserted between the gripping and bending prisms, is bent with the flap, and then the rod facing the side to rotate will move forward (fig. N. 8, i2) , thereby rotating the sheet 45 degrees in a clockwise direction (fig. no. 8, F5B) .
  • the rod (fig. n. 8, il) opens the chuck, moves back and goes to position on the anti-clockwise side and closes the vice (fig.
  • the rod (fig. 9, i2) opens the vice and relocates on the same side as the opposite rod and closes the grip (fig. n. 10, i2). Then the il rod moves backward, which causes the sheet to rotate another 45 ° in a clockwise direction and which, when added to the previous rotation, will bring the sheets below the fold prisms, on the next side (fig. n. 11, F5E) .
  • the sheet will be bent on all sides, thus creating a closed panel on all four sides, made possible along with a discharge function (groove) on the upper prism (Fig. 6, MIA) which will be able to clamp the sheet on the last side to be bent without crushing the previously bent side (fig.
  • the multifunction combined pressing-bending-calender machine in this invention is equipped with a calendering device with four independent rollers, controlled both in their positions and the rotation speed, along with the possibility of controlling the speed of the positioning callipers, it can also perform closed ring curvatures (tubes) .
  • the cycle to perform a closed tube begins with the execution of a fold along the outer edge as previously described, performed by the upper flap more precisely towards the bottom, in such a way to present the fold to the opposite of the centre.
  • a first arc of curvature is executed with the inner rollers in calendering position (Fig. 38, v2, v3) and with the lower outer roller in bending position and rotated at the desired angle (Fig. No.
  • the gripper (fig. 41, 1) pushes the sheet forward (Fig. 41, F6D) , the upper roller withdraws into the starting position (fig. 41, vl) and the result of the calendering sequences is a semi- closed tube (fig. 42, F6E) with the end part still straight and held integrally by grippers (fig. 42, 1) .
  • the subsequent processing is carried out by a carriage (Fig 1, x -Fig. 43, x) that runs along the bottom flap starting from one end of the tube (Fig. 24, ql ) and, since it is equipped with a series of pairs of circular tools and is actuated by a gear motor (fig.
  • a profiler carriage can also be defined, which slides along the outer side of the flap (Fig. 27, x2 ) .
  • the machine in question can be equipped with a dilator device (Fig 1, xz) , (Fig. 44, xz) , driven by geared motors adapted to carry out the movement and press the rotary motion of the tools (fig. 44, F7L) , to dilate the diameter of the tube (fig. 45, f7n) , for a length sufficient to allow the other end (fig.
  • FIG. 42,43,44,45,46 An example is shown in figures 42,43,44,45,46, where the end result is a double open channel with a double curve, bend and counter-bend with a flat surface on the central part.
  • the first command will be to close the grippers, followed by support roller z2 forward- support roller z3 forward - closing prism - flap ql forward - support roller z4 forward - take roll holder z4 - ql flap rotation - take flap ql rotation share - pliers forward - take gripper - calender v2 roller rotation - calender v3 roller rotation - calendar v4 roller rotation.
  • the machine will perform the first curve (fig.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

L'objet de la présente invention est une machine de calandrage et cintrage à la presse combinée multifonctions avec un ou deux volets, pliant et cintrant des tôles avec trois ou quatre rouleaux asymétriques qui déterminent la courbure de l'arc sont positionnés le long du bord externe et/ou sur les volets pour traiter des séquences mixtes telles que des courbes, courbes en v, des spirales ouvertes et/ou fermées, des ellipses, des paraboles, des plis et des contre-plis dans un cycle automatique pour créer des formes géométriques fermées dans la direction longitudinale, plus précisément qui sont circulaires, ovales, rectangulaires, carrées, triangulaires, polygonales, coniques, trapézoïdales, etc., et équipée de pinces de préhension qui tiennent la tôle serrée à usiner, afin de maintenir la position dans toutes les phases, le tout dans une structure unique. La machine en question est gérée par une commande numérique continue (CNC), un système ouvert qui est programmable en réglant les cycles de mouvement des actionneurs en fonction des processus à exécuter. Elle est également équipée d'un dispositif de découpe et de profilage avec des outils circulaires rotatifs pour couper et plier les deux bords longitudinaux afin d'obtenir des produits complets et finis, tels que des conduits, des tuyaux de descente, des gouttières, des bandes de recouvrement, des tuyaux, divers revêtements divers, etc. de façon à satisfaire aux besoins de production, principalement dans les secteurs civil, industriel, commercial et agricole.
EP16813040.9A 2015-09-22 2016-09-20 Machine multifonctionnelle de pliage à la presse Withdrawn EP3389889A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUB2015A004609A ITUB20154609A1 (it) 2015-09-22 2015-09-22 Macchina multifunzione atta ad eseguire pieghe, curve aperte e chiuse in lamiera, sequenzialmente, in unica struttura.
PCT/IT2016/000216 WO2017051441A2 (fr) 2015-09-22 2016-09-20 Machine multifonction

Publications (1)

Publication Number Publication Date
EP3389889A2 true EP3389889A2 (fr) 2018-10-24

Family

ID=55085835

Family Applications (1)

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EP16813040.9A Withdrawn EP3389889A2 (fr) 2015-09-22 2016-09-20 Machine multifonctionnelle de pliage à la presse

Country Status (3)

Country Link
EP (1) EP3389889A2 (fr)
IT (1) ITUB20154609A1 (fr)
WO (1) WO2017051441A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023126271A1 (de) * 2023-09-27 2025-03-27 EVOBEND GmbH Verfahren zur Fertigung einer Vertiefung mit einer Biegemaschine und dazu eingerichtete Biegemaschine
CN120244611B (zh) * 2025-05-09 2026-04-07 宏峰建设集团有限公司 一种水利管道加工装置及其加工方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1273326B (it) * 1994-02-23 1997-07-08 Salvagnini Italia Spa Macchina piegatrice per fogli di lamiera
DE19901797A1 (de) * 1999-01-19 2000-07-27 Reinhardt Gmbh Maschbau Biegemaschine
ITVR20040110A1 (it) * 2004-06-29 2004-09-29 Finn Power Italia S R L Testata idraulica multifunzionale applicabile su macchine sagomatrici e piegatrici di lamiere e o profilati metallici

Also Published As

Publication number Publication date
WO2017051441A3 (fr) 2017-05-04
ITUB20154609A1 (it) 2017-03-22
WO2017051441A2 (fr) 2017-03-30

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