EP0587842A1 - Machine pour cintrer simultanement deux fils metalliques individuels superposes - Google Patents

Machine pour cintrer simultanement deux fils metalliques individuels superposes

Info

Publication number
EP0587842A1
EP0587842A1 EP19930906366 EP93906366A EP0587842A1 EP 0587842 A1 EP0587842 A1 EP 0587842A1 EP 19930906366 EP19930906366 EP 19930906366 EP 93906366 A EP93906366 A EP 93906366A EP 0587842 A1 EP0587842 A1 EP 0587842A1
Authority
EP
European Patent Office
Prior art keywords
bending
lever
cutting
cutting device
straightening
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.)
Ceased
Application number
EP19930906366
Other languages
German (de)
English (en)
Inventor
Klaus Ritter
Gerhard Ritter
Walter Resch
Gerhard Schmidt
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.)
EVG Entwicklungs und Verwertungs GmbH
Original Assignee
EVG Entwicklungs und Verwertungs GmbH
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 EVG Entwicklungs und Verwertungs GmbH filed Critical EVG Entwicklungs und Verwertungs GmbH
Publication of EP0587842A1 publication Critical patent/EP0587842A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B21F1/006—Bending wire other than coiling; Straightening wire in 3D with means to rotate the tools about the wire axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • B21D11/12—Bending specially adapted to produce specific articles, e.g. leaf springs the articles being reinforcements for concrete
    • 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
    • B21D43/006—Feeding elongated articles, such as tubes, bars, or profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire

Definitions

  • the invention relates to a bending machine for simultaneously bending two superposed individual wires, in which a first straightening device, a feed device, a second straightening device and a retractable cutting device, which is provided with a fixed knife and with a movable knife, are successively along a working line. and a bending device with a bending table defining a bending plane are provided.
  • EP-Al-379 043 discloses a pair of scissors that can be moved in the production direction for a bending machine for bending strand-like material to form reinforcement stirrups and that is arranged in front of the bending device when viewed in the production direction.
  • the scissors have a guide for the material to be bent, which at the same time forms a fixed cutting edge, and a movable cutting edge.
  • the scissors i.e. the wire guide, together with the movable cutting edge, are briefly pivoted back out of the bending plane in order to allow the end piece of the bracket to bend and not to hinder the movements of the end piece during bending.
  • the scissors have to be moved back into the bending plane in order to be able to guide the material to be bent during the advancing and bending.
  • the object of the invention is to provide a bending machine which, during the bending of a strand of material into reinforcement stirrups, does not hinder the movements of bent legs of the reinforcement stirrup to be produced and at the same time is such that it does not deflect the bent legs from the bending plane and thus the bending enables a very flat reinforcement bar.
  • a bending machine of the type specified in the introduction is characterized in that the cutting device between a fixed wire guide for simultaneous Guiding two superimposed individual wires of a strand of material and for supporting the strand of material during bending and the bending device is arranged and that the cutting device is displaced during the entire bending process at least from the feed path of the upper single wire into a retracted position.
  • a scissor lever pivotally mounted in a stationary frame on which the knives are arranged and which has two side arms, a working cylinder, which is supported on the stationary frame, being pivoted on the one side arm for pivoting the scissor lever.
  • a two-armed cutting lever is preferably pivotally mounted in the scissor lever, the movable knife being arranged on one arm of the cutting lever and a working cylinder articulated on the other arm of the cutting lever, which cylinder is supported on the side arm of the scissor lever.
  • Figure la is a schematically illustrated bending machine according to the invention in plan view.
  • Fig. Lb in a schematic representation of the contour of a cover plate for the underlying devices of the bending machine
  • Fig. Lc an enlarged detail of the cutting device and a bending plate
  • Fig. 2 seen a schematic representation of a side view of the cutting device in the production direction
  • Fig. 3 seen a detail of the cutting device perpendicular to the direction of production.
  • the bending machine shown schematically in FIGS. 1b and 1c essentially has an inlet-side straightening device 1, a feed device 2, an outlet-side straightening device 3, a length measuring device 4, essentially along a working line XX Wire guide 5, a cutting device 6 and a bending device 7.
  • the inlet-side straightening device 1 consists of several straightening rollers 8 which are rotatably mounted in two opposite rows, the straightening rollers of one row being adjustable against the straightening rollers of the other row in accordance with the double arrow P-.
  • the outlet-side straightening device 3 is constructed analogously to the inlet-side straightening device 1. However, the plane in which all straightening rollers 7 of the straightening device 3 on the outlet side lie is rotated through 90 ° to the plane in which all straightening rollers 8 of the straightening device 1 on the inlet side lie.
  • the feed device 2 has at least one pair of feed rollers 9 which can be driven in both directions of rotation in accordance with the double arrow P «.
  • the strand of material is drawn off from the supply spools (not shown) according to the arrow P along the working line XX with the aid of the feed rollers 9 and fed to the bending device 7.
  • the wire guide 5 is arranged on a bracket 10 (FIG. 3) and has a front part 11 and a rear part 12, both of which are provided with corresponding recesses adapted to the shape and diameter of the material strand.
  • the wire guide 5 also serves as a counter-holder for the bending device 7, wherein at least the rear part 12 of the wire guide 5 can be adjusted against the front part 11 to adapt to different diameters of the material strand in accordance with the double arrow P.
  • the bending device 7 has a bending plate 13 which can be rotated in accordance with the double arrow Pg and which carries a central bending mandrel 14 and an eccentrically arranged bending tool 15.
  • the bending plate 13 is arranged in a recess 16 of a bending table 17 according to the double arrow P g so as to be displaceable perpendicular to the working line, the surface 18 of the bending table 17 defining the bending plane, which preferably assumes a position inclined to the vertical plane (FIG. 2).
  • the central bending mandrel 14 and the eccentrically arranged bending tool 15 cooperate with the wire guide 5 designed as a counter-holder, which must therefore be appropriately dimensioned to support the strand of material to be bent.
  • the inlet-side and outlet-side straightening devices 1 and 3, the feed device 2 and the length measuring device 4 are completely covered by a hinged cover plate 19 which extends to the cutting device 6 and partially covers the parts 11, 12 of the wire guide 5.
  • the end 19 'of the cover plate 19 facing the cutting device 6 is correspondingly flattened on all sides from the straightening device 3 to the cutting device 6 towards the bending plane 18, in order to reinforce a leg B which is already bent and points against the production direction P 3 when a reinforcing bar is bent (FIG. 3) not to hinder the reinforcement stirrup.
  • the cutting device 6 has a scissor arm 20, which in principle is designed as a one-armed lever with a free side arm 21 and a further side arm 22 and is pivotally mounted in the pivot point 23 in a stationary frame 24, which is only schematically indicated .
  • a working cylinder 25 is supported on the stationary frame 24, the piston 26 of which is articulated on the side arm 21.
  • the piston 26 is displaceable in accordance with the double arrow P-, so that the scissors lever 20 executes a corresponding pivoting movement in accordance with the double arrow P g about its pivot point 23.
  • a further working cylinder 27 is supported on the side arm 22 of the scissor lever 20, the piston 28 of which is articulated on an arm of a cutting lever 29.
  • the cutting lever 29 is designed as a two-armed lever and is rotatably mounted in a pivot point 30 in the scissor lever 20.
  • the piston 28 of the working cylinder 27 can be advanced in accordance with the double arrow P g , so that the cutting lever 29 executes a pivoting movement in accordance with the double arrow P "around its pivot point 30.
  • a knife 31 attached, which interacts with a corresponding fixed to the scissor lever 20, fixed knife 32.
  • the cutting device 6 operates as follows: To cut off a strand of material, which for example consists of two individual wires D1 and D2 lying one above the other, the working cylinder 25 is actuated, as a result of which the piston 26 is in the corresponding position In the direction of the double arrow P "and thus the scissors lever 20 is pivoted in the corresponding direction of the double arrow P g into its upper working position shown in dash-dotted lines in FIG. 3.
  • the scissors lever 20 is pivoted into a lower position after the cut has been made, which is shown in full lines in FIG. 3 and in which the upper edge 33 of the knife 31 does not hinder the movement path of a bent-back stirrup leg B and on the other hand one made of a single wire D1 the material strand can be severed at any time without additional positioning of the scissors lever 20.
  • the bent-back leg B is still somewhat deflected from the bending plane. This deflection from the bending plane 18 is one compared to the deflection bent back leg B 1 according to the prior art, however, by an angular amount "a" less, so that 6 reinforcement brackets can be bent with the cutting device according to the invention, which are flatter compared to the prior art and hardly gape apart.

Abstract

Machine pour cintrer simultanément deux fils métalliques individuels superposés, dans laquelle se trouvent à la suite, le long d'une ligne de travail, un premier dispositif d'alignement (1), un dispositif d'avancement (2), un second dispositif d'alignement (3) et un dispositif de coupe (6) rétractible muni d'une lame fixe et d'une lame mobile, ainsi qu'un dispositif de cintrage (7) muni d'une table de cintrage définissant le plan de cintrage. Le dispositif de coupe est disposé entre un guide-fil fixe (5) destiné à guider simultanément les deux fils individuels superposés (D1, D2) d'une ligne de matériau et à soutenir cette ligne de matériau lors du cintrage, et le dispositif de cintrage. Pendant le processus de cintrage complet, le dispositif de coupe est déplacé dans une position de retrait, du moins hors de la trajectoire d'amenée du fil individuel supérieur (D2).
EP19930906366 1992-04-03 1993-04-01 Machine pour cintrer simultanement deux fils metalliques individuels superposes Ceased EP0587842A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT702/92 1992-04-03
AT70292 1992-04-03

Publications (1)

Publication Number Publication Date
EP0587842A1 true EP0587842A1 (fr) 1994-03-23

Family

ID=3497565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930906366 Ceased EP0587842A1 (fr) 1992-04-03 1993-04-01 Machine pour cintrer simultanement deux fils metalliques individuels superposes

Country Status (3)

Country Link
EP (1) EP0587842A1 (fr)
GR (1) GR940300042T1 (fr)
WO (1) WO1993019865A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113210528A (zh) * 2021-04-28 2021-08-06 玖创建设有限公司 一种建筑施工用钢筋弯折设备及其弯折方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1291259B1 (it) * 1997-03-13 1998-12-30 Schnell Spa Gruppo raddrizzante bifilare per materiali metallici in filo e simili.
IT1292692B1 (it) 1997-03-20 1999-02-11 Schnell Spa Procedimento e macchina per la piegatura automatica di profilati e simili.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE456515C (de) * 1925-07-17 1928-02-25 Demag Akt Ges Schere zum Zerschneiden von Walzgut
IT1235176B (it) * 1989-01-18 1992-06-23 Piegatrici Macch Elettr Cesoia mobile a monte gruppo piegatore e procedimento di piegatura in coda.
IT1248134B (it) * 1991-02-28 1995-01-05 A C M Srl Automatismi Costruzi Gruppo piegatore per fasci di barre

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9319865A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113210528A (zh) * 2021-04-28 2021-08-06 玖创建设有限公司 一种建筑施工用钢筋弯折设备及其弯折方法

Also Published As

Publication number Publication date
GR940300042T1 (en) 1994-07-29
WO1993019865A1 (fr) 1993-10-14

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