EP2600991A1 - Procédé et appareil permettant de corriger les contraintes de torsion dans des tiges métalliques - Google Patents

Procédé et appareil permettant de corriger les contraintes de torsion dans des tiges métalliques

Info

Publication number
EP2600991A1
EP2600991A1 EP11741559.6A EP11741559A EP2600991A1 EP 2600991 A1 EP2600991 A1 EP 2600991A1 EP 11741559 A EP11741559 A EP 11741559A EP 2600991 A1 EP2600991 A1 EP 2600991A1
Authority
EP
European Patent Office
Prior art keywords
rod
rods
correction
engage
axis
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.)
Granted
Application number
EP11741559.6A
Other languages
German (de)
English (en)
Other versions
EP2600991B1 (fr
Inventor
Simone Rupoli
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.)
Schnell SpA
Original Assignee
Schnell SpA
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 Schnell SpA filed Critical Schnell SpA
Publication of EP2600991A1 publication Critical patent/EP2600991A1/fr
Application granted granted Critical
Publication of EP2600991B1 publication Critical patent/EP2600991B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
    • B21D3/05—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged on axes rectangular to the path of the work
    • 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
    • B21F1/02—Straightening

Definitions

  • the present invention regards a method and an apparatus for correcting the effect of twist stresses in metal rods and the like, designed in particular for making reinforcements for reinforced concrete.
  • metal rods in coil used in particular for making reinforcements for reinforced concrete, are generally fed by respective reels to be worked in machines provided with suitable straightening apparatuses.
  • Such straightening apparatuses are usually provided with a series of operating members suitable to act on the metal rod being advanced before it reaches the successive working stations, for example the cut station and successively sometimes the folding station.
  • Such straightening apparatuses are suitable to eliminate the residual curvature caused by the winding of the rod as a coil.
  • the straightening members subject the rod to suitable flexure actions of intensity such as to overcome the elastic limit of the material, so as to substantially eliminate the residual curvature which, due to the elasticity, would tend to go back to the original conformation, and thus to make the straightening effect permanent.
  • such apparatuses can provide a fi rst straightening unit and a second straightening unit, suitable to correct prevalently corresponding components of the curvature of the metal rod on different planes, for example on a horizontal plane and on a vertical plane.
  • a problem which occurs in the considered field is that of elim inating or suitably reducing the effects of the residual twist stresses that can occur in the metal rods after the passage in the straightening apparatuses or are induced by effect of the unwinding from the reel from which they come.
  • such residual stresses can produce undesired effects in the rod folding step, for example producing stirrups in which the head and tail folds are not coplanar, or stirrups which ends are not close to each other, or substantially overlapped, but result open so that the whole piece does not lie substantially on a single plane, and thus comes to be very similar to a coil.
  • the task of the present invention is that of solving the aforementioned problems, devising a method that allows to perform in an efficient way the correction of the twist stresses in metal rods.
  • Another object of the present invention is that of providing a straightening unit provided with the aforesaid correction apparatus.
  • a further scope of the invention is that of providing a correction apparatus of simple building and functional conception, provided with securely reliable functioning and versatile use, as well as relatively economic cost.
  • the method for correcting the twist stresses in metal rods provides for feeding a first rod through at least one first correction wheel provided with a grooved portion, suitably shaped, suitable to engage also transversally said first rod and with an adjacent flat bottom portion suitable to engage a second rod fed by the side of the first rod.
  • the axial shifting of said first correction wheel is then performed, in a direction transverse to the feed axis of the rods, so as to act on said first rod without having influence on the second rod placed beside to the rod to be corrected.
  • the second correction wheel provided with a grooved portion, suitably shaped, suitable to engage said second rod and with an adjacent flat bottom portion suitable to engage said first rod.
  • Axial shifting of said first and/or second straightening wheel is then performed, in a direction transverse to the feed axis of the rods, to perform respectively the correction of the twist effect of said first and/or of said second rod, without having influence on the rod placed beside to the rod to be corrected.
  • the present invention also concerns an apparatus for correcting the twist stresses in metal rods.
  • the apparatus com prises at least one first correction wheel, rotatable according to an axis transverse to the feed axis of the rods, having a grooved portion, suitably shaped, suitable to engage also transversely a first rod, and an adjacent flat bottom portion suitable to engage a second rod fed by the side of the first rod, said first correction wheel being suitable to be actuated in axial shifting , in a direction transverse to the feed axis of the rods, to perform the correction of the twist effect of said first rod.
  • the apparatus comprises a second straightening wheel rotatable about an axis parallel to the axis of said first correction wheel, having a grooved portion, suitably shaped, suitable to engage said second rod and an adjacent flat bottom portion suitable to engage said first rod, said correction whee ls be i ng su itable to be actuated in axial sh ifti ng , independently from each other, in a direction transverse to the feed axis of the rods, to perform respectively the correction of the effect of the twist stresses of said first rod and/or of said second rod.
  • figure 1 shows a perspective view of a straightening unit provided with the apparatus in hand for correcting the twist stresses
  • figure 2 shows a front view of said apparatus for correcting the twist stresses
  • figure 3 shows a transverse section view of the apparatus in hand, in a different operating step.
  • a straightening unit provided with the apparatus 10 for correcting the twist stresses in metal rods 2, object of the invention, is indicated in its entirety with 1 .
  • the straighten ing unit 1 com prises, in a known way, a plural ity of straightening wheels 3, 4, suitably grooved, arranged in sequence with axis parallel at opposite sides with respect to the feed axis of the rods 2.
  • the straightening wheels 3 arranged at one side of the rods are counter-rotating with respect to the straightening wheels arranged at the opposed side, under control of suitable motor member or drawn by the rod pulled or pushed which crosses them.
  • straightening wheels 3, 4 are arranged staggered with respect to each other according to the feed axis of the rods 2 and have each a couple of throats 3a, 4a placed beside, with V-shaped profile, so as to engage a couple of rods 2 placed beside, fed simultaneously between the same straightening wheels 3, 4.
  • the straightening wheels 3, 4 are arranged on a vertical plane, with the upper wheels 3 set carried rotatable by a frame 5 that is mobile with respect to a base structure 6 whereon the lower wheels 4 are carried rotatable, under control of suitable motor members.
  • the upper wheels 3 are staggered with respect to the lower wheels 4.
  • Practically the upper straightener wheels 3 can be suitably approached or spaced with respect to the lower straightener wheels 4 to set the strength of the straightening on the basis of the exigencies of the row material being worked.
  • the correction apparatus 10 comprises a couple of correction wheels 1 1 , 12 arranged in between in the sequence of the straightening wheels 3, 4, arranged for example staggered with respect to each other and at opposite sides with respect to the feed axis of the rods 2.
  • the correction wheels 1 1 , 12 have respectively their axis parallel to the axis of the straightening wheels 3, 4, transverse to the feed axis of the rods 2.
  • the correction wheels 1 1 , 12 have respectively a grooved portion 1 1 a, 12a, defined by an annular throat substantially similar to the annular throats of the straightening wheels 3, 4, and an adjacent flat bottom portion 1 1 b, 12b.
  • the grooved portion 1 1 a, 12a has preferably a V profile, with the sides suitably inclined to engage the rod 2 at opposite sides, or anyway it is suitably profiled to engage the rod 2 when the wheel 1 1 , 12 is shifted along its own axis, transversely with respect to the same rod.
  • the flat bottom portion 1 1 b, 12b has width suitably bigger than the diameter of the rods 2 to be treated.
  • a first correction wheel 1 1 has an annular portion 1 1 a which is suitable to engage a first rod 2 fed to the straightening unit and which results more external to the straightening unit
  • a second correction wheel 12 has an annular portion 12a which is suitable to engage a second rod 2 fed by the side of the first rod 2 and that results more internal to the straightening unit.
  • the correction wheels 1 1 , 12 are suitable to be shifted according to their own axis, independently from each other, between an inactive position, wherein the respective grooved portion 1 1 a, 12a is arranged on the same longitudinal plane as the straightening wheels 2, 3 and an active position wherein such a grooved portion 1 1 a, 12a acts on a relative rod 2 shifting axially to its own rotation axis.
  • the correction wheels 1 1 , 12 are carried rotatable, through suitable rolling members, on a respective hub 13, 14 which is supported axially slidable by the structure of the straightening unit 1 and is associated with suitable measure members 14, 15.
  • the measure members 14, 15 are constituted for example by respective linear potentiometers.
  • the shifting of the correction wheels 1 1 , 12 into the active position can be realized through suitable actuator members or also by hand, through screw members and the like.
  • the metal rods 2 to be straightened are fed in couple, by the side of each other, between the straightening wheels 3, 4 of the straightening unit 1 .
  • the rods 2 engage the corresponding throats 3a, 4a of the straightening wheels 3, 4 so as to subject the rods 2 to suitable flexure actions which enable to substantially cancel the residual curvature and make the straightening effect permanent.
  • the rods 2 engage also the grooved portion 1 1 a, 12a and the flat bottom portion 1 1 b, 12b of the correction wheels 1 1 , 12 which, in the inactive position, result arranged on the same longitudinal plane as the corresponding throats 3a, 4a of the straightening wheels 3, 4 (fig. 2).
  • the shifting in the active position of the correction wheel 1 1 , 12 that engages by means of the relative grooved portion 1 1 a, 12a the rod 2 to be corrected is operated (fig. 3). Following such a shifting, the grooved portion 1 1 a, 12a of the correction wheel 1 1 , 12 acts on the rod 2 which crosses it, realizing the desired correction action.
  • the method and the apparatus in hand reach the scope of performing in an efficient way the correction of the twist stresses in metal rods fed to a straightening unit.
  • the apparatus allows to perform in an independent manner the correction of the twist stresses of one or more metal rods fed simultaneously to the straightening unit.
  • the apparatus described for illustrative purpose is susceptible of various modifications and variants according to the exigencies.
  • the shifting of the correction wheels from the inactive position to the active position is realized through a tilting movement of the same correction wheels, on a plane transverse to the feed axis of the rods.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

La présente invention concerne un procédé permettant de corriger l'effet des contraintes de torsion dans des tiges métalliques, consistant à alimenter une première tige (2) parmi deux tiges métalliques (2) à travers au moins une première roue de correction (11) pourvue d'une partie rainurée (11a), de forme appropriée, conçue pour mettre en prise également de manière transversale ladite première tige (2), et d'une partie inférieure plate adjacente (11b) conçue pour mettre en prise une seconde tige (2) alimentée par le côté de la première tige (2). Le décalage axial de ladite première roue de correction (11) est effectué, dans une direction transversale à l'axe d'alimentation des tiges (2), pour exécuter la correction de l'effet de la torsion de ladite première tige (2).
EP11741559.6A 2010-08-04 2011-08-03 Procede et appareil permettant de corriger les contraintes de torsion dans des tiges métalliques Active EP2600991B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO2010A000506A IT1401411B1 (it) 2010-08-04 2010-08-04 Metodo e apparecchiatura per la correzione delle sollecitazioni di torsione in tondini metallici.
PCT/EP2011/063351 WO2012016998A1 (fr) 2010-08-04 2011-08-03 Procédé et appareil permettant de corriger les contraintes de torsion dans des tiges métalliques

Publications (2)

Publication Number Publication Date
EP2600991A1 true EP2600991A1 (fr) 2013-06-12
EP2600991B1 EP2600991B1 (fr) 2015-03-11

Family

ID=43532673

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11741559.6A Active EP2600991B1 (fr) 2010-08-04 2011-08-03 Procede et appareil permettant de corriger les contraintes de torsion dans des tiges métalliques

Country Status (3)

Country Link
EP (1) EP2600991B1 (fr)
IT (1) IT1401411B1 (fr)
WO (1) WO2012016998A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUD20130124A1 (it) * 2013-09-30 2015-03-31 A C M Srl Automatismi Costruzioni Meccaniche Apparato di traino e raddrizzatura
CN107774748A (zh) * 2017-11-23 2018-03-09 上海瑞纽机械股份有限公司 一种适用于抗振条支点和扭曲的校正装置
CN109175153A (zh) * 2018-10-02 2019-01-11 河北骄阳丝网设备有限责任公司 金属丝应力消除调直机及调直金属丝的方法
CN109648445B (zh) * 2019-01-29 2020-08-14 中岭建设集团有限公司 一种具有矫正功能的钢筋打磨设备
IT201900002713A1 (it) * 2019-02-25 2020-08-25 Schnell Spa Gruppo di correzione della curvatura di elementi metallici di foggia allungata
CN112077234A (zh) * 2020-09-18 2020-12-15 成都固特机械有限责任公司 一种全自动单独可调轮机构
CN113275484A (zh) * 2021-06-17 2021-08-20 美克钢纤维(马鞍山)有限公司 一种钢纤维多轮校直器
AT18332U1 (de) * 2023-03-16 2024-10-15 Evg Entwicklungs U Verwertungs Ges M B H Vorrichtung zum automatischen Richten von längserstrecktem Richtgut und Verfahren hierzu

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2662379B1 (fr) 1990-05-22 1992-09-04 Carrere Noel Procede et dispositif pour le reglage automatique des dresseurs a galets.
IT1291259B1 (it) * 1997-03-13 1998-12-30 Schnell Spa Gruppo raddrizzante bifilare per materiali metallici in filo e simili.
IT1299943B1 (it) * 1998-03-30 2000-04-04 Schnell Spa Metodo e apparecchiatura per la raddrizzatura di profilati metallici e simili.
ATE320868T1 (de) * 2000-02-03 2006-04-15 Stema Engineering As Verfahren und vorrichtung zum reduzieren von internen spannungen in armierungseisen oder ähnlichem
ITBO20020604A1 (it) * 2002-09-25 2004-03-26 Schnell Spa Gruppo di correzione finale in apparecchiature per

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012016998A1 *

Also Published As

Publication number Publication date
EP2600991B1 (fr) 2015-03-11
IT1401411B1 (it) 2013-07-26
WO2012016998A1 (fr) 2012-02-09
ITBO20100506A1 (it) 2012-02-05

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