EP0537496A1 - Méthode pour cintrer des bouts de barres pour la construction civile avec des cintreuses coupantes, et cintreuses coupantes utilisant la méthode - Google Patents

Méthode pour cintrer des bouts de barres pour la construction civile avec des cintreuses coupantes, et cintreuses coupantes utilisant la méthode Download PDF

Info

Publication number: EP0537496A1
Authority: EP; European Patent Office
Prior art keywords: bending; bar; assembly; bars; building work
Prior art date: 1991-10-15
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 Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Withdrawn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

EP92116005A

Other languages

German (de)

English (en)

Inventor

Giorgio Del Fabro

Marcello Del Fabro

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.)

MEP Macchine Elettroniche Piegatrici SpA

Original Assignee

MEP Macchine Elettroniche Piegatrici 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.)

1991-10-15

Filing date

1992-09-18

Publication date

1993-04-21

1992-09-18 Application filed by MEP Macchine Elettroniche Piegatrici SpA filed Critical MEP Macchine Elettroniche Piegatrici SpA

1993-04-21 Publication of EP0537496A1 publication Critical patent/EP0537496A1/fr

Status Withdrawn legal-status Critical Current

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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
- 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
- B21D7/00—Bending rods, profiles, or tubes

Definitions

This invention concerns a method to make bends in the trailing ends of bars for building work in bending-shaping machines and concerns also bending-shaping machines for bars for building work which employ such method, as set forth in the relative main claims.
the method of this invention to make bends in the trailing ends is applied properly to the field of processing sections for reinforcements in reinforced concrete, the sections being in the form of bars or rolls of a round, square, polygonal or other cross section.
the bending-shaping machines of the state of the art which are characterized by having one single bending assembly downstream of a shearing assembly and of a straightening-drawing assembly, or a drawing assembly alone, entail the problem of making bends in the trailing end of the bar.
Document IT-B-1024229 discloses a teaching of making the bend in the trailing end, lowering the bending assembly and bringing the section back to the required length before performing the shearing. This system entails long processing times and lowering and raising mechanisms which by their use involve great consumptions of energy and problems of wear and maintenance.
Document IT 83349 A/89 discloses a proposal to arrange the shears assembly separately above the bending assembly, but this proposal entails the problem of shearing the trailing end where the trailing end is long.
Documents IT 83543 A/90 and EP-A-0.379.043 disclose a bending-shaping machine which comprises a retractable drawing assembly located downstream of the bending assembly.
This retractable drawing assembly enables the section to be clamped and, after the shearing operation, to be drawn downstream by a desired length so that the bend in the trailing end can then be made.
This teaching is in itself interesting and useful but involves problems of overall bulk and of moving the drawing assembly, with resulting problems of wasted energy, maintenance, wasted materials and a complex structure.
Document DE-A-1.249.057 teaches a complex system for expanding the abutment roll for as to clamp the bar. This system cannot be applied to bending/shaping machines which produce up to 1500/1600 stirrups an hour because it has a very short life and is complex to handle.
Document DE-A-1.920.668 teaches the thrusting of a bar with an appropriate jack, but this teaching cannot be applied to bending/shaping machines owing to the high working speed, the need for simplicity and the necessity of not having any contacts during the travel of the bar.
EP-A-0.371.960 teaches the use of the bending pin of an end-bending assembly to clamp the bar while the other bending assemblies are positioned.
the invention consists in providing a normal bending-shaping machine for bars for building work and also a method which enables bends to be made in the trailing end of bars for building work, even when the end segment of the bent bar has a length different from the distance between the shearing plane and the axis of the abutment roll of the bending assembly.
a first formulation of the method to make bends in the trailing end of bars according to the invention provides that, after all the bends have been made except the bend in the trailing end and after shearing to size has taken place and has separated the bent bar from the feeding section, the bar is thrust downstream by the distance required by the feeding action of the feeding section.
the feeding section When the feeding section has thrust the bent bar downstream by the distance required, the feeding section moves back to its starting position and the bend is made in the trailing end of the bar.
This first formulation includes clamping means or abutment means or other means suitable for the purpose which are positioned downstream of the bending assembly so as to hold the bar rigidly in position during the aforesaid step of making the bend in the trailing end of the bar.
clamping means or abutment means or other means suitable for the purpose can be retracted below the working plane so as to enable the preceding bends to be made in the bar.
a second formulation of the method to make bends in the trailing end of the bar according to the invention provides that the bending assembly can move parallel to the axis of feed of the bar.
This motion of feed is achieved, for instance, by slider means able to move on suitable guides, the bending assembly being positioned on these slider means.
the bending assembly is rotated by an amount enough to clamp the bar by bending the same, and the bar will abut against a third retractable point; the bending assembly is then moved forwards downstream until it has displaced the bent bar by the required distance.
the bending assembly then releases the bent bar, which is clamped by an appropriate retractable assembly and is brought back upstream by a required value, at which the bend in the trailing end of the bar is made.
Figs.1 show a cycle of making a bend in the trailing end of a bar according to a first formulation of the method of this invention.
Fig.1a shows a bar 10 coming in this example from a wound roll, the bar 10 having undergone all the bending operations except that of its trailing end; for the sake of simplicity the bends made consist here of one single bend 23, which in this case is a hook in the leading end of the bar 10.
the displacements of the bar 10 along the working plane are brought about by a drawing assembly 11 located upstream of a bending assembly 12.
the drawing assembly 11 may comprise also a straightening assembly or may consist of a straightening assembly alone.
the drawing assembly 11 and bending assembly 12 form part of the state of the art and are therefore unimportant for the purposes of the invention.
the bending assembly 12 comprises a bending disk 13, a bending pin 14 and an abutment roll 15.
the rod 10 is sheared to the desired length by a shearing assembly 16 and thus is separated from a feeding section 22.
the sheared bar 10 is thrust downstream by the feeding section 22, which is drawn forwards by the desired length and cooperates by butting against the bar 10 (Fig.1b).
the feeding section 22 is moved backwards and the bending assembly 12 makes the bend in the trailing end 24,in this case a lefthand bend (Fig.1c); this bend 24 in the trailing end can be of any type.
clamping means 17 are positioned downstream of the bending unit 12 and consist, in this case, of two idler rolls 18 capable of a movement orthogonal to the working plane in this example.
clamping means 17 are retractable so as to enable the preceding bends 23 to be made without the bar 10 coming into contact with the clamping means 17.
the clamping means 17 may also consist of a vice or, where they consist of rolls, may be capable also of rotary movement.
Fig.1a the clamping means 17 are located below the working plane, whereas in Fig.1b the clamping means 17 position the bar 10 and let it slide, while in Fig.1c the clamping means 17 grip the bar 10 and keep it in position during the performance of the bend 24 in the trailing end.
Figs.2 show a cycle of making a bend in the trailing end according to the second formulation of the method of this invention.
Fig.2a shows a rod 10 coming, in this case, from a wound roll of a feeding section 22 and having all the bends 23, except bends 24 in the trailing end, already made; these bends 23 already made are summarized in this case with one single hook. With all these bends 23 made, the bar 10 is sheared to the desired length by the shearing assembly 16 (Fig.2a).
the bending assembly 12 is positioned on a suitable slider 19 which can move on guides 21 parallel to the axis of feed of the bar 10.
the bending assembly 12 After making the bends 23, but not bends in the trailing end, and after the bar 10 has been sheared to the desired length, the bending assembly 12 is rotated about its axis until the bending pin 14 rests against the bar 10 and compels the bar 10 to rest against a clamping means 117, so that the bar 10 is clamped between the bending pin 14 and the abutment roll 15 (Fig.2b).
clamping means 117 are retractable and consist of two idler rolls 20 capable, in this example, of a movement orthogonal to the working plane.
the bending assembly 12 (Fig.2c) is moved downstream by the desired distance and takes the bar 10 with it.
the bending assembly 12 retreats to its bending position (Fig.2e), where it makes the bend 24 in the trailing end with the desired bending angle (Fig.2f).
the bending assembly 12 may be of any type and may carry out any other known auxiliary movement.

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

EP92116005A 1991-10-15 1992-09-18 Méthode pour cintrer des bouts de barres pour la construction civile avec des cintreuses coupantes, et cintreuses coupantes utilisant la méthode Withdrawn EP0537496A1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
ITUD910169		1991-10-15
ITUD910169A IT1252962B (it)	1991-10-15	1991-10-15	Procedimento per l'esecuzione delle pieghe di coda nei ferri per l'edilizia in macchine piegatrici/ sagomatrici e macchine piegatrici/ sagomatrici per ferri per l'edilizia adottanti tale procedimento

Publications (1)

Publication Number	Publication Date
EP0537496A1 true EP0537496A1 (fr)	1993-04-21

Family

ID=11420927

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP92116005A Withdrawn EP0537496A1 (fr)	1991-10-15	1992-09-18	Méthode pour cintrer des bouts de barres pour la construction civile avec des cintreuses coupantes, et cintreuses coupantes utilisant la méthode

Country Status (4)

Country	Link
EP (1)	EP0537496A1 (fr)
KR (1)	KR930007531A (fr)
CA (1)	CA2080032A1 (fr)
IT (1)	IT1252962B (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0875309A1 (fr) *	1997-04-29	1998-11-04	M.E.P. Macchine Elettroniche Piegatrici S.p.A.	Système de pliage preferentiel pour machine à plier
WO2003024640A1 (fr) *	2001-09-14	2003-03-27	M.E.P. Macchine Elettroniche Piegatrici Spa	Cintreuse pour profiles, tels que des pieces rondes de renforcement ou similaires
WO2003045603A1 (fr) *	2001-11-30	2003-06-05	M.E.P. Macchine Elettroniche Piegatrici Spa	Machine a plier conçue pour des profiles tels que des pieces circulaires de renfort ou des pieces analogues
EP1247594A3 (fr) *	2001-04-06	2003-07-16	Schnell S.p.A.	Procédé de pliage de barres profilées et dispositif pour la réalisation dudit procédé
EP1247595A3 (fr) *	2001-04-06	2003-07-16	Schnell S.p.A.	Procédé de pliage de barres profilées et dispositif pour la réalisation dudit procédé
EP1396296A1 (fr) *	2002-09-04	2004-03-10	Schnell S.p.A.	Procédé pour couper et éventuellement plier des profilés par une plieuse et une machine de formage, notamment des profilés en forme de barres
US7610788B2 (en)	2005-11-15	2009-11-03	Antonios Anagnostopoulos	Machine and method for preventing torsion of wire, material of prismatic cross-section, and rod material
CN105013986A (zh) *	2015-05-27	2015-11-04	德清铭泰户外用品有限公司	一种钢丝自动弯折裁剪设备
CN105195651A (zh) *	2015-10-29	2015-12-30	胡满航	地脚螺栓的新型成型方法
CN105414400A (zh) *	2015-10-29	2016-03-23	胡满航	一种地脚螺栓生产线

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1249057B (de) *		1967-08-31	Fa Paul Ferd Peddmghaus Gevelsberg (Westf)	Mitnehmer fur Formstucke fur Betonstahlbiegemaschinen
DE1920668A1 (de) *	1968-04-23	1969-11-13	Pines Engineering Co Inc	Numerisch gesteuerte Rohrbiegemaschine
FR2290969A1 (fr) *	1974-11-15	1976-06-11	Fabro Remigio Del	Machine automatique pour fabriquer des etriers
EP0371960A2 (fr) *	1986-03-14	1990-06-06	Ruhl, Heinz	Procédé pour cintrer des matériaux en forme de barre
EP0379043A1 (fr) *	1989-01-18	1990-07-25	M.E.P. Macchine Elettroniche Piegatrici S.p.A.	Dispositif de traînage monté en aval d'une cintreuse et procédé pour cintrer les bouts arrières de barres

1991
- 1991-10-15 IT ITUD910169A patent/IT1252962B/it active IP Right Grant
1992
- 1992-09-18 EP EP92116005A patent/EP0537496A1/fr not_active Withdrawn
- 1992-10-07 CA CA002080032A patent/CA2080032A1/fr not_active Abandoned
- 1992-10-08 KR KR1019920018446A patent/KR930007531A/ko not_active Withdrawn

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1249057B (de) *		1967-08-31	Fa Paul Ferd Peddmghaus Gevelsberg (Westf)	Mitnehmer fur Formstucke fur Betonstahlbiegemaschinen
DE1920668A1 (de) *	1968-04-23	1969-11-13	Pines Engineering Co Inc	Numerisch gesteuerte Rohrbiegemaschine
FR2290969A1 (fr) *	1974-11-15	1976-06-11	Fabro Remigio Del	Machine automatique pour fabriquer des etriers
EP0371960A2 (fr) *	1986-03-14	1990-06-06	Ruhl, Heinz	Procédé pour cintrer des matériaux en forme de barre
EP0379043A1 (fr) *	1989-01-18	1990-07-25	M.E.P. Macchine Elettroniche Piegatrici S.p.A.	Dispositif de traînage monté en aval d'une cintreuse et procédé pour cintrer les bouts arrières de barres

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5966979A (en) *	1997-04-29	1999-10-19	M.E.P. Macchine Elettroniche Piegatrici Spa	Bending machine and method having positionable drawing rolls and limiting mechanism defining a transit and containing space for the workpiece
EP0875309A1 (fr) *	1997-04-29	1998-11-04	M.E.P. Macchine Elettroniche Piegatrici S.p.A.	Système de pliage preferentiel pour machine à plier
EP1247594A3 (fr) *	2001-04-06	2003-07-16	Schnell S.p.A.	Procédé de pliage de barres profilées et dispositif pour la réalisation dudit procédé
EP1247595A3 (fr) *	2001-04-06	2003-07-16	Schnell S.p.A.	Procédé de pliage de barres profilées et dispositif pour la réalisation dudit procédé
WO2003024640A1 (fr) *	2001-09-14	2003-03-27	M.E.P. Macchine Elettroniche Piegatrici Spa	Cintreuse pour profiles, tels que des pieces rondes de renforcement ou similaires
US7004003B2 (en)	2001-09-14	2006-02-28	M.E.P. Macchine Elettroniche Piegatrici Spa	Bending machine for profiles
US7104102B2 (en)	2001-11-30	2006-09-12	M.E.P. Macchine Elettroniche Piegatrici Spa	Bending machine for profiles such as reinforcement round pieces or similar
WO2003045603A1 (fr) *	2001-11-30	2003-06-05	M.E.P. Macchine Elettroniche Piegatrici Spa	Machine a plier conçue pour des profiles tels que des pieces circulaires de renfort ou des pieces analogues
EP1396296A1 (fr) *	2002-09-04	2004-03-10	Schnell S.p.A.	Procédé pour couper et éventuellement plier des profilés par une plieuse et une machine de formage, notamment des profilés en forme de barres
US7610788B2 (en)	2005-11-15	2009-11-03	Antonios Anagnostopoulos	Machine and method for preventing torsion of wire, material of prismatic cross-section, and rod material
CN105013986A (zh) *	2015-05-27	2015-11-04	德清铭泰户外用品有限公司	一种钢丝自动弯折裁剪设备
CN105195651A (zh) *	2015-10-29	2015-12-30	胡满航	地脚螺栓的新型成型方法
CN105414400A (zh) *	2015-10-29	2016-03-23	胡满航	一种地脚螺栓生产线

Also Published As

Publication number	Publication date
CA2080032A1 (fr)	1993-04-16
ITUD910169A0 (it)	1991-10-15
IT1252962B (it)	1995-07-07
ITUD910169A1 (it)	1993-04-15
KR930007531A (ko)	1993-05-20

Legal Events

Date

Code

Title

Description

1993-03-05

PUAI

Public reference made under article 153(3) epc to a published international application that has entered the european phase

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