EP1396296A1 - Verfahren zum Abschneiden und ggf. Biegen von Profilen, insbesondere Stäben auf einer Biegemaschine und einer Umformmaschine - Google Patents

Verfahren zum Abschneiden und ggf. Biegen von Profilen, insbesondere Stäben auf einer Biegemaschine und einer Umformmaschine Download PDF

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Publication number
EP1396296A1
EP1396296A1 EP02019774A EP02019774A EP1396296A1 EP 1396296 A1 EP1396296 A1 EP 1396296A1 EP 02019774 A EP02019774 A EP 02019774A EP 02019774 A EP02019774 A EP 02019774A EP 1396296 A1 EP1396296 A1 EP 1396296A1
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EP
European Patent Office
Prior art keywords
assembly
bending
profiled element
cropping
upstream feeder
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
EP02019774A
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English (en)
French (fr)
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EP1396296B1 (de
Inventor
Gianfranco Terenzi
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
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Schnell SpA
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Publication date
Application filed by Schnell SpA filed Critical Schnell SpA
Priority to EP20020019774 priority Critical patent/EP1396296B1/de
Publication of EP1396296A1 publication Critical patent/EP1396296A1/de
Application granted granted Critical
Publication of EP1396296B1 publication Critical patent/EP1396296B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a method for cropping to size and optionally bending profiled elements with bending and shaping machines, particularly for cropping and optionally bending profiled elements supplied in bar form.
  • Bending and shaping machines for bending profiled elements provided in coil or bar form, particularly for producing reinforced concrete frames, are known.
  • These machines are generally constituted at least by: an upstream feeder assembly, which can be actuated to produce the advancement of the profiled element along its axis; a bending assembly, which is arranged downstream of the upstream feeder assembly along the advancement direction imparted to the profiled element by the upstream feeder assembly; cropping means, which are interposed between the upstream feeder assembly and the bending assembly, and a downstream traction assembly of the roller type, which is indeed located downstream of the bending assembly and in axial alignment with the preceding assemblies and with the direction of advancement of the profiled element being processed.
  • These machines generally work by performing, by way of the cropping means, an optional first cropping of the profiled element, so as to define the leading end of the profiled element, and by then performing one or more bends in the leading portion of the profiled element by way of the combined actuation of the upstream feeder assembly and of the bending assembly.
  • the profiled element is made to advance, by means of the upstream feeder assembly, by a preset extent and is then cropped, by way of the cropping means, so as to define the trailing end of the profiled element.
  • the part of the profiled element that lies downstream of the cropping means is disengaged from the action of the upstream feeder assembly.
  • the trailing portion of the profiled element is subjected to one or more bending operations, engaging the profiled element with the downstream traction assembly and actuating, in an appropriately combined manner, said downstream traction assembly and the bending assembly.
  • the cropping means are constituted by shears that can move on command along the advancement direction of the profiled element in order to crop the trailing portion of the profiled element to the intended length in order to form the required bends along said portion.
  • the various elements of the machine are supported by a structure that forms a worktable that is generally substantially vertical, subvertical or otherwise tilted and on which the profiled element is bent, and a support on which the profiled element is made to advance.
  • the shears can be retractable with respect to said worktable.
  • the bending assembly in these machines, can be able to move at right angles to the worktable as well as at right angles to the axis of the profiled element, in order to engage or disengage the profiled element.
  • the downstream traction assembly is composed of one or more pairs of rollers, between which the profiled element being processed passes. Also the downstream traction assembly can be movable at right angles to the worktable, optionally on three different levels, in order to engage or disengage the profiled element and optionally lift the profiled element.
  • rollers of each pair of rollers of the downstream traction assembly can be movable toward or away from each other in order to engage or disengage the profiled element.
  • the upstream feeder assembly cannot be moved closer to the cropping means or vice versa beyond a certain limit, due to dimensional problems, the length of the profiled element being processed that is actually usable is reduced by an extent at least equal to said limit.
  • the upstream feeder assembly would in fact cease producing the advancement of the bar segment before the intended length of profiled element, for obtaining another finished part, has passed through the cropping means.
  • the aim of the present invention is to solve the above described problem, by providing a method for cropping to size and optionally bending profiled elements, particularly for cropping and optionally bending profiled elements supplied in bar form, with bending and shaping machines, particularly of the type described above, that allows to reduce waste considerably.
  • an object of the invention is to provide a method that allows to utilize, for production purposes, the entire length of the profiled element fed to the machine.
  • Another object of the invention is to provide a method that can be performed without requiring substantial structural modifications with currently commercially available bending and shaping machines, particularly of the type described above.
  • a method for cropping to size and optionally bending profiled elements particularly for cropping and optionally bending profiled elements supplied in bar form, with bending and shaping machines of the type that comprises at least: an upstream feeder assembly, which can be actuated to produce the advancement of the profiled element along its axis; a bending assembly, which is arranged downstream of said upstream feeder assembly along the direction of the advancement of the profiled element by way of the action of said upstream feeder assembly; cropping means, which are interposed between said upstream feeder assembly and said bending assembly; and a downstream traction assembly of the roller type, arranged downstream of said bending assembly; the method comprising at least one step for the advancement of the profiled element along said advancement direction, which is performed by way of said upstream feeder assembly, and being characterized in that it comprises sequentially, for the end portion of the profiled element, the steps of:
  • Figures 1, 3, 5, 7 and 9 are sequential views of the various steps of the method according to the invention with a bending and shaping machine, shown only schematically and in front view;
  • Figures 2, 4, 6, 8 and 10 are views of the same steps of the method according to the invention shown in the preceding figures, with the bending and shaping machine shown schematically in cross-section.
  • the method according to the invention is meant to be performed by way of bending and shaping machines of the type that comprises, in a per se known manner, at least: an upstream feeder assembly 1, which can be actuated in order to produce the advancement of the profiled element 2, preferably in bar form, along its axis in an advancement direction 3; a bending assembly 4, which is arranged downstream of the upstream feeder assembly 1 along the advancement direction 3; cropping means 5, which are interposed between the upstream feeder assembly 1 and the bending assembly 4; and a downstream traction assembly 6, which is indeed located downstream of the bending assembly 4.
  • the various elements of the machine are all axially aligned along the advancement direction 3 and are supported by a structure that forms a worktable 20, which is generally vertical or inclined but might also be horizontal.
  • the upstream feeder assembly 1 can be constituted, in a per se known manner, by pairs of rollers 7 that have mutually parallel axes which are generally horizontal and are pressed against each other in order to engage the profiled element 2, which passes between them, and can be actuated at least partially with a rotary motion about their respective axes in order to produce the advancement of the profiled element 2 along the direction 3.
  • the upstream feeder assembly 1 can be constituted in a per se known manner by a plurality of separate units instead of a single unit, for example a unit arranged proximate. to the insertion region of the profiled element 2 and a unit adjacent to the cropping means 5.
  • the cropping means 5 can be constituted by shears 8 that are stationary or movable, in a per se known manner, along the direction 3 and may also retract with respect to the worktable 20.
  • the bending assembly 4 can be constituted by a central pin 9 and by a bending pin 10 that can rotate around the central pin 9.
  • the bending assembly can be provided according to other known configurations, such as for example a bending disk on which a central roller and a bending pin are fixed, or, as another alternative, a shaped channel that acts as an abutment and as a central bending mandrel, and a movable disk that supports the bending pin.
  • the bending assembly 4 can be movable, in a per se known manner, both at right angles to the worktop 20, i.e., generally in a substantially horizontal direction, in order to engage or disengage the profiled element 2, and parallel to the worktop 20, i.e., generally in a substantially vertical direction, in order to engage in a different manner the profiled element 2 depending on the direction of the bending to be performed and/or in order to lift the profiled element 2, i.e., by using the multiple operating levels according to the known art or in the most appropriate combinations in relation to the type of finished part and to the shape of the machine.
  • the downstream traction assembly 6 is of the roller type and is constituted, in a per se known manner, by one or more pairs of rollers 11 that have mutually parallel axes, are generally perpendicular to the worktop 20, and are pressed against each other in order to engage the profiled element 2, which passes between them, and can be actuated at least partially with a rotary motion about their respective axes in order to produce the advancement of the profiled element 2.
  • Both the bending assembly 4 and the downstream traction assembly 6, as described by the cited patents, may assume three different positions according to requirements: a first normal position for working at the level of the worktable 20; an optional second position in which they are retracted fully or partially below the worktable, also referenced as retracted position, in order to avoid interfering with the profiled element being processed; and a third elevated position above the worktable 20 in order to allow some processes without interfering with the physical dimensions of the cropping means and the upstream feeder assembly.
  • the downstream traction assembly 6 can be movable, in a per se known manner, substantially at right angles to the worktable 20 in order to engage or disengage the profiled element 2.
  • profiled element is used to designate a profiled element having any cross-section, either solid or hollow according to requirements, particularly a steel rod for reinforced concrete.
  • finished part is used to reference the product of the treatment of the machine, be it a bracket, a bent part or a simple straight bar cropped to size or simply extracted from a bundle without performing any cropping.
  • the profiled element in the presence of a recoverable trailing portion of the profiled element 2, is made to advance by the upstream feeder assembly 1 through the cropping means 5 and is subjected to optional bending by way of the combined actuation of the upstream feeder assembly 1 and of the bending assembly 4.
  • the profiled element 2 is made to advance by the upstream feeder assembly 1 by an extent that is at least sufficient to engage the downstream traction assembly 6 on a portion of profiled element that has not been bent.
  • the downstream traction assembly 6 can be spaced, or better still retracted, under the worktable 20 to avoid hindering the advancement of the profiled element 2.
  • the downstream traction assembly 6 is then moved so as to engage the profiled element 2 and is then actuated so as to perform a step for pulling the profiled element along the advancement direction 3 in cooperation or not with the upstream feeder assembly 1, in order to obtain the useful length for forming the finished part, as shown in Figures 7 and 8.
  • What characterizes the method according to the invention is that the final part of this traction is performed in any case by the downstream traction assembly 6 alone, since the profiled element has at this point exited from the rollers 7 of the upstream feeder 1.
  • the advancement imposed to the profiled element 2 by the upstream feeder assembly 1 and by the downstream traction assembly 6 is equal to the overall extension that one wishes to obtain for the finished part to be produced, both when said advancement is achieved with the separate and successive intervention of the assemblies 1 and 6 and when there is a moment of cooperation of the assemblies 1 and 6.
  • the cycle continues in a per se known manner, for example as described in the above cited patents. More specifically, the cropping means 5 are actuated, cropping the trailing end of the profiled element 2; as shown in Figures 7 and 8, by way of the combined actuation of the downstream traction assembly 6 and of the bending assembly 4, the optional bending (one or more bends) of the trailing portion of the profiled element 2 is performed and the profiled element is then unloaded from the machine.
  • downstream traction assembly 6 can be engaged with the profiled element 2 before the advancement action produced by the upstream feeder assembly 1 ends. In this case, during the simultaneous actuation, the upstream feeder assembly 1 is synchronized with the downstream traction assembly 6. What characterizes the invention, however, is the fact that the downstream traction assembly 6 is the only one responsible for moving the profiled element 2 in the trailing portion, when the end of the profiled element has left the upstream feeder assembly 1.
  • the cropping means 5 are not actuated.
  • the cropping means 5 are never actuated; moreover, if in this last case the bending of the profiled element is also not required, the machine operates like a simple unit for extracting bars from a bundle of bars.
  • downstream traction assembly 6 can be used to extract from the machine the "unrecoverable trailing portion", i.e., the final portion of the bar that is shorter than the length required for the finished part, so long as said unrecoverable trailing portion has a length that is sufficient to reach the downstream traction assembly 6.
  • downstream traction assembly 6 is used in two different situations: not only to move axially the profiled element 2 after cropping in order to position the profiled element at the level required to perform the bend or bends of the trailing end, as provided by the background art, but also to complete the advancement of the profiled element 2 in its recoverable end portion before performing said cropping. It is therefore possible to utilize practically all the length of the profiled element fed to the machine despite the inevitable distance between the upstream feeder assembly 1 and the cropping means 5.
  • the present invention therefore allows to obtain a waste that is shorter than the distance between the upstream feeder assembly 1 and the cropping means 5, or even no waste at all; this is absolutely not possible with the methods currently in use.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP20020019774 2002-09-04 2002-09-04 Verfahren zum Abschneiden und ggf. Biegen von Profilen, insbesondere Stäben auf einer Biegemaschine und einer Umformmaschine Expired - Lifetime EP1396296B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20020019774 EP1396296B1 (de) 2002-09-04 2002-09-04 Verfahren zum Abschneiden und ggf. Biegen von Profilen, insbesondere Stäben auf einer Biegemaschine und einer Umformmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20020019774 EP1396296B1 (de) 2002-09-04 2002-09-04 Verfahren zum Abschneiden und ggf. Biegen von Profilen, insbesondere Stäben auf einer Biegemaschine und einer Umformmaschine

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EP1396296A1 true EP1396296A1 (de) 2004-03-10
EP1396296B1 EP1396296B1 (de) 2005-07-20

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EP20020019774 Expired - Lifetime EP1396296B1 (de) 2002-09-04 2002-09-04 Verfahren zum Abschneiden und ggf. Biegen von Profilen, insbesondere Stäben auf einer Biegemaschine und einer Umformmaschine

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2258494A1 (de) 2009-06-05 2010-12-08 WAFIOS Aktiengesellschaft Biegevorrichtung für stabförmige Werkstücke
CN102601276A (zh) * 2012-03-13 2012-07-25 建科机械（天津）股份有限公司 钢筋自动弯箍机的双剪切机构
ITUD20120210A1 (it) * 2012-12-05 2014-06-06 Fabro Giorgio Del Macchina di piegatura per prodotti metallici e relativo procedimento di piegatura
US9067255B2 (en) 2011-07-08 2015-06-30 Wafios Aktiengesellschaft Bending apparatus for rod-shaped workpieces
JP2016093847A (ja) * 2010-07-28 2016-05-26 シュネル エス．ピー．エー． 強化コンクリート用の強化鉄筋を製造する方法
CN116421857A (zh) * 2023-06-09 2023-07-14 北京唯迈医疗设备有限公司 用于介入手术导丝的自动塑形装置及系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0501212A1 (de) * 1991-02-28 1992-09-02 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Anlage zum Auswählen und Biegen von Stangen für Bauaufgaben
EP0537496A1 (de) * 1991-10-15 1993-04-21 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Methode zum Biegen der hinteren Enden von Betonstahlstangen in Biege- Schermaschinen, und Biege-Schervorrichtung für Betonstahlstangen zum Einsatz dieser Methode
JP2001225110A (ja) * 2000-02-18 2001-08-21 Oribe Shinji 棒状エレメント、特に鉄筋を整形し所定寸法に切断するための装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0501212A1 (de) * 1991-02-28 1992-09-02 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Anlage zum Auswählen und Biegen von Stangen für Bauaufgaben
EP0537496A1 (de) * 1991-10-15 1993-04-21 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Methode zum Biegen der hinteren Enden von Betonstahlstangen in Biege- Schermaschinen, und Biege-Schervorrichtung für Betonstahlstangen zum Einsatz dieser Methode
JP2001225110A (ja) * 2000-02-18 2001-08-21 Oribe Shinji 棒状エレメント、特に鉄筋を整形し所定寸法に切断するための装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 25 12 April 2001 (2001-04-12) *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2258494A1 (de) 2009-06-05 2010-12-08 WAFIOS Aktiengesellschaft Biegevorrichtung für stabförmige Werkstücke
US8561449B2 (en) 2009-06-05 2013-10-22 Wafios Aktiengesellschaft Bending apparatus for rod-shaped workpieces
JP2016093847A (ja) * 2010-07-28 2016-05-26 シュネル エス．ピー．エー． 強化コンクリート用の強化鉄筋を製造する方法
US9067255B2 (en) 2011-07-08 2015-06-30 Wafios Aktiengesellschaft Bending apparatus for rod-shaped workpieces
CN102601276A (zh) * 2012-03-13 2012-07-25 建科机械（天津）股份有限公司 钢筋自动弯箍机的双剪切机构
ITUD20120210A1 (it) * 2012-12-05 2014-06-06 Fabro Giorgio Del Macchina di piegatura per prodotti metallici e relativo procedimento di piegatura
WO2014087221A1 (en) * 2012-12-05 2014-06-12 Giorgio Del Fabro Bending machine for metal products and corresponding bending method
US9636732B2 (en) 2012-12-05 2017-05-02 Giorgio Del Fabro Bending machine for metal products and corresponding bending method
CN116421857A (zh) * 2023-06-09 2023-07-14 北京唯迈医疗设备有限公司 用于介入手术导丝的自动塑形装置及系统

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