EP1415734A1 - Stangenbiegemaschine und Biegeverfahren - Google Patents

Stangenbiegemaschine und Biegeverfahren Download PDF

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Publication number
EP1415734A1
EP1415734A1 EP20030103942 EP03103942A EP1415734A1 EP 1415734 A1 EP1415734 A1 EP 1415734A1 EP 20030103942 EP20030103942 EP 20030103942 EP 03103942 A EP03103942 A EP 03103942A EP 1415734 A1 EP1415734 A1 EP 1415734A1
Authority
EP
European Patent Office
Prior art keywords
bending
feed
axis
assembly
auxiliary
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
EP20030103942
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English (en)
French (fr)
Other versions
EP1415734B1 (de
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
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Publication date
Application filed by MEP Macchine Elettroniche Piegatrici SpA filed Critical MEP Macchine Elettroniche Piegatrici SpA
Publication of EP1415734A1 publication Critical patent/EP1415734A1/de
Application granted granted Critical
Publication of EP1415734B1 publication Critical patent/EP1415734B1/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
    • 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

Definitions

  • the present invention concerns a bending machine for bars and a relative bending method.
  • the bending machine according to the invention has at least an element associated or cooperating with the bending assembly and suitable to be selectively activated to function as an auxiliary drawing element, in or close to the area of the bending assembly, in order to axially move segments of bar that are not bent, or are partly bent.
  • the auxiliary drawing element can be used to discharge segments or off-cuts gripped on a drawing assembly, to transfer a bar from one to the other of the drawing assemblies arranged upstream and downstream of the bending assembly, or for every other operating step typical of such bending machines wherein the intervention of an auxiliary drawing element is required.
  • Bending machines for bars are known, suitable to produce shaped reinforcement elements, essentially consisting of at least a drawing assembly, at least a shears and at least a bending assembly. There may also be present a second drawing assembly, downstream of the bending assembly, used to move the bar linearly with respect to the bending assembly and make trailing end bends in order to make the shaped element.
  • the drawing assemblies may be of the type having a first working position, above the plane where the bars advance, and at least a second retracted position under this advancing plane. Examples of these bending machines are disclosed in EP-A-0.379.043, FR-A-2.553.314 and EP-A-0.538.595, all in the name of the present Applicant.
  • the second drawing assembly can be found on the same axis or off-axis with respect to the first drawing assembly. In this second case, there are transfer means to move the bar from one to the other working axis.
  • the drawing assemblies can be of the type with rollers, grippers, or combined rollers and grippers.
  • the machine can have a single shears or several shears, for example one upstream and one downstream of the first drawing assembly, and/or another shears arranged between the bending assembly and the second drawing assembly.
  • a first problem of bending machines of this type is how to discharge the off-cuts or surplus workings of the machine.
  • Another problem is that it is substantially impossible to make small-size shaped elements, for example with a linear development of less than 100 cm. This is caused by the fact that the distance between the two drawing assemblies, upstream and downstream of the bending assembly, cannot be reduced beyond a minimum value, given the intermediate presence of at least a shears and the bending assembly itself.
  • the bar to be worked has a length of less than the distance between the two drawing assemblies, when it leaves the upstream drawing assembly it is not yet gripped on the downstream drawing assembly and therefore it can no longer be moved. This constitutes a considerable limit to the versatility of such machines.
  • Applicant has devised and embodied the present invention to overcome these shortcomings and to obtain other advantages as shown hereafter.
  • the purpose of the invention is to achieve a bending machine for bars, and a connected bending method, suitable to work every length of bar, even small size ones, to obtain shaped elements starting from segments of a length less than 100 cm, as little as 60-70 cm and less.
  • a further purpose is to allow off-cuts, remaining gripped on the drawing assembly, to be discharged.
  • auxiliary element associated with the bending assembly, and substantially laterally positioned with respect to said bending assembly, there is at least an auxiliary element that can be selectively activated to arrange itself temporarily in a position cooperating with the axis of feed of the bar, in or close to the area of the bending assembly, and to perform at least temporarily the function of an auxiliary drawing element, for example to transfer the bar from one to the other of the drawing assemblies, or to discharge an off-cut from the drawing assembly.
  • said auxiliary element has a first inactive position arranged at the side of the axis of feed of the bar, and a second active position, translated laterally with respect to the first position, wherein it is taken to cooperate with the axis of feed of the bar substantially in the area of the bending assembly, or in close proximity with this area.
  • the bending assembly is movable laterally with respect to the axis of feed of the bar and the auxiliary element is mounted on the same supporting element on which the bending assembly is mounted, and moves with said assembly.
  • said auxiliary element comprises at least a roller able to selectively perform, in cooperation with the outer perimeter of the disk element, the function of an auxiliary drawing element.
  • One and/or the other of the disk-type bending element and the auxiliary element are also equipped with an independent movement of lateral translation to close on the bar.
  • the two elements are driven in rotation on their axis so as to perform a temporary drawing function.
  • the disk-type bending element is associated with a position transducer, such as for example an encoder, and functions as a drawing element, while the roller functions as a contrasting element.
  • the outer perimeter of the disk-type bending element includes means to accentuate the grip, in order to increase the gripping action on the segment of bar during drawing.
  • the auxiliary element comprises at least a pair of rollers mounted on the supporting element of the bending assembly and able to be selectively arranged, by means of lateral translation, astride the axis of feed of the bar in order to function as an auxiliary drawing element by rotating on its own axis.
  • the auxiliary element comprises at least a gripper element, mounted on the supporting element of the bending assembly and able to be selectively arranged in cooperation with the axis of feed of the bar by means of lateral translation. Once in position, the gripper element moves linearly with an alternating movement in order to move the segment of bar, moving along eyelets made on the supporting element of the bending assembly.
  • the auxiliary element comprises a gripper element, or a pair of rollers, having a first inactive position arranged laterally to the bending assembly and an active position cooperating with the axis of feed of the bar in order to grip the bar and move it linearly.
  • the bending assembly moves to a position of non-interference with the plane of feed of the bar and allows said auxiliary element to be positioned and driven.
  • the bending machine illustrated above by obtaining an auxiliary drawing function in or strictly close to the area of the bending assembly, allows both to discharge any type of off-cut gripped on the drawing assembly, and also to achieve shaped elements of a minimum size, less than the distance between the two drawing assemblies located upstream and downstream of the bending assembly. Moreover, the bulk in length of the machine is not increased, and the structure and functioning of the components normally used are not modified.
  • a bending machine 12 for bars 18 essentially comprises a bending assembly 11, a shears 14 located upstream of the bending assembly 11, a first drawing assembly 15 with pairs of rollers located upstream of the shears 14 and, in this case, a second drawing assembly 16 with pairs of rollers located downstream of the bending assembly 11. It comes within the field of the invention that the second drawing assembly 16 is located on another axis with respect to the first drawing assembly 15, or that it is not present.
  • the bending assembly 11 consists of a rotary bending disk 13 on which a contrasting pin 20 is mounted, arranged axially, and a peripheral bending pin 28.
  • the bending machine 12 also comprises, in this case, a guard 17 which limits any lifting of the partly bent portion of bar 18 with respect to a plane of feed 19.
  • the bar 18 advances with respect to the machine 12 on an axis of feed 21. It comes within the field of the invention that the bending machine 12 can have a different configuration, for example with two or more shears 14, one or both the drawing assemblies of the gripper type instead of with rollers, or other configuration.
  • the bending machine 12 also comprises, in this case, an auxiliary element 10 temporarily arranged in an inactive position at the side of the bending disk 13 and mounted on the same movable supporting plate 22 on which the disk 13 itself is mounted.
  • the auxiliary element 10 consists of a roller 23 associated with an axial rotation pin 24.
  • the supporting plate 22 can be moved transversely with respect to the axis of feed 21 of the bar 18, in the direction 25 (fig. 2).
  • the supporting plate 22 is selectively driven to perform a first movement of retraction inside the plane of feed 19, in order to free the bending disk 13 from interference with the bar 18, then a second movement of lateral translation until it positions the outer perimeter of the bending disk 13 at the side of the bar 18, and then another movement to exit onto the plane of feed 19.
  • the roller 23 moves laterally, in the direction 26, to close on grip on the bar 18 (figs. 2 and 3).
  • the bending disk 13 and the roller 23 are made to rotate on their own axis to function as an auxiliary drawing element and transfer segments of bar 18 of limited length from the first 15 to the second 16 drawing assembly.
  • the inverse operations are started to move the supporting plate 22 in order to again position the bending disk 13 in its normal position with respect to the axis of feed 21 and perform the trailing end bends so as to complete the formation of the shaped element (fig. 4).
  • the bending disk 13 advantageously uses the encoder with which it is normally equipped in order to displace the bar 18 linearly according to defined lengths functional to obtain the subsequent desired bends.
  • the bending disk 13 has means 27 to accentuate grip, such as teeth, knurling, ridges or suchlike, in order to increase its ability to grip the segment of bar 18 when it performs its function as an auxiliary drawing element.
  • roller 23 is arranged below the bending disk 13, it obviously comes within the field of the invention that it can be located above the disk 13, and also not exactly in axis with it, at least in the inactive position.
  • the auxiliary element 10 consists of two pairs of rollers 31 mounted on the supporting plate 22.
  • the plate 22 when it is necessary to transfer a short segment of bar 18 from the first 15 to the second 16 drawing assembly, the plate 22 is moved and translated transversely with respect to the axis 21 in order to position the rollers 31 astride said axis 21. After a further closing movement of one pair of rollers 31 with respect to the other, the rollers 31 are driven in rotation to make the bar 18 advance linearly and transfer it to the second drawing assembly 16. Finally, the plate 22 is again moved to return the bending disk 13 into position.
  • the auxiliary element 10 consists of a gripper element 29 mounted on the supporting plate 22 and movable with an alternating motion, autonomous with respect to the bending disk 13, along eyelets 30.
  • the supporting plate 22 is moved transversely to the axis 21 and upwards to position the gripper element 29 in cooperation with the axis 21 and gripping on the bar 18.
  • the gripper element 29, moving linearly in the eyelets 30, makes the segment of bar 18 advance until it is gripped on the rollers, or other similar or comparable elements, of the drawing assembly 16. Then, in the same way as we saw before, the plate 22 repositions the bending disk 13 in axis with the axis of feed 21 of the bar 18 in order to make further bends.
  • the auxiliary element 10 consists of a gripper element 129, movable autonomously with respect to the bending assembly 11 transversely to the axis of feed 21 in the direction 125.
  • the gripper element 129 by means of an arm 34, is mounted on a slider 32 with respect to which it can slide axially in the direction 125.
  • the bending disk 13 moves to a position of non-interference below the plane of feed 19
  • the gripper element 129 translates laterally to move into cooperation with the axis of feed 21
  • the gripper closes on the bar 18, and the slider 33 is moved forwards, along eyelets 30 in the direction 126, to displace the bar 18 linearly, for example to transfer it to the second drawing assembly 16.
  • the inverse movements are made to return the gripper element 129 to the position of non-interference and the bending disk 13 to the working position.
  • any similar or equivalent drawing element can function as an auxiliary element 10, both in combination with the bending disk 13, as in the case of figs. 1-6, and also autonomously, as in figs. 7-11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Wire Processing (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
EP03103942A 2002-10-28 2003-10-24 Stangenbiegemaschine und Biegeverfahren Expired - Lifetime EP1415734B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000226A ITUD20020226A1 (it) 2002-10-28 2002-10-28 Macchina piegatrice per barre e relativo procedimento di piegatura
ITUD20020226 2002-10-28

Publications (2)

Publication Number Publication Date
EP1415734A1 true EP1415734A1 (de) 2004-05-06
EP1415734B1 EP1415734B1 (de) 2010-01-20

Family

ID=11460767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03103942A Expired - Lifetime EP1415734B1 (de) 2002-10-28 2003-10-24 Stangenbiegemaschine und Biegeverfahren

Country Status (6)

Country Link
EP (1) EP1415734B1 (de)
AT (1) ATE455605T1 (de)
DE (1) DE60331033D1 (de)
DK (1) DK1415734T3 (de)
ES (1) ES2339757T3 (de)
IT (1) ITUD20020226A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012013729A1 (en) * 2010-07-28 2012-02-02 Schnell S.P.A. Method for making reinforcement irons
ITUD20110061A1 (it) * 2011-04-18 2012-10-19 Piegatrici Macch Elettr Macchina piegatrice di barre metalliche, quali tondi per armatura o simili
ITUD20130066A1 (it) * 2013-05-20 2014-11-21 Piegatrici Macch Elettr Macchina per la piegatura di prodotti metallici e relativo procedimento di piegatura.
IT201700064059A1 (it) * 2017-06-09 2018-12-09 A L F A Costr Metalmeccaniche S R L Macchina piegatrice
CN112165999A (zh) * 2018-03-26 2021-01-01 Acm自动建设机械股份有限公司 加工金属制品的机器和方法
CN112756505A (zh) * 2021-03-11 2021-05-07 彭错 一种水泥井盖浇筑用圆弧钢筋弯折裁剪一体机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2553314A1 (fr) * 1983-10-12 1985-04-19 Piegatrici Macch Elettr Methode et machine de fabrication d'etriers
EP0379043A1 (de) * 1989-01-18 1990-07-25 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Stromabwärts einer Biegeeinrichtung angeordnete Ziehvorrichtung und Verfahren zum Biegen der hinteren Enden von Stangen
EP0538595A1 (de) * 1991-10-21 1993-04-28 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Biege-Schermaschine mit mehreren Arbeitsebenen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2553314A1 (fr) * 1983-10-12 1985-04-19 Piegatrici Macch Elettr Methode et machine de fabrication d'etriers
EP0379043A1 (de) * 1989-01-18 1990-07-25 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Stromabwärts einer Biegeeinrichtung angeordnete Ziehvorrichtung und Verfahren zum Biegen der hinteren Enden von Stangen
EP0538595A1 (de) * 1991-10-21 1993-04-28 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Biege-Schermaschine mit mehreren Arbeitsebenen

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012013729A1 (en) * 2010-07-28 2012-02-02 Schnell S.P.A. Method for making reinforcement irons
CN103608133B (zh) * 2011-04-18 2015-10-07 Mep意大利美普机械制造有限公司 用于折弯金属棒条的折弯机
WO2012143776A1 (en) * 2011-04-18 2012-10-26 M.E.P. Macchine Elettroniche Piegatrici Spa Bending machine for bending metal bars, such as round pieces for reinforcement or suchlike
CN103608133A (zh) * 2011-04-18 2014-02-26 Mep意大利美普机械制造有限公司 用于折弯如用于加固或此类的圆形件的金属棒条的折弯机
ITUD20110061A1 (it) * 2011-04-18 2012-10-19 Piegatrici Macch Elettr Macchina piegatrice di barre metalliche, quali tondi per armatura o simili
ITUD20130066A1 (it) * 2013-05-20 2014-11-21 Piegatrici Macch Elettr Macchina per la piegatura di prodotti metallici e relativo procedimento di piegatura.
WO2014188332A1 (en) * 2013-05-20 2014-11-27 M.E.P. Macchine Elettroniche Piegatrici Spa Machine for bending metal products and corresponding bending method
KR20160013097A (ko) * 2013-05-20 2016-02-03 엠.이.피. 머신 일레트로니쉐 피에가트리치 에스피에이 금속 제품을 밴딩하기 위한 기계 및 그 밴딩 방법
US10265749B2 (en) 2013-05-20 2019-04-23 M.E.P. Macchine Elettroniche Piegatrici Spa Machine for bending metal products and corresponding bending method
US11325173B2 (en) 2013-05-20 2022-05-10 M.E.P. Macchine Elettroniche Piegatrici Spa Machine for bending metal products and corresponding bending method
IT201700064059A1 (it) * 2017-06-09 2018-12-09 A L F A Costr Metalmeccaniche S R L Macchina piegatrice
CN112165999A (zh) * 2018-03-26 2021-01-01 Acm自动建设机械股份有限公司 加工金属制品的机器和方法
CN112165999B (zh) * 2018-03-26 2023-03-10 Mep意大利美普机械制造有限公司 加工金属制品的机器和方法
CN112756505A (zh) * 2021-03-11 2021-05-07 彭错 一种水泥井盖浇筑用圆弧钢筋弯折裁剪一体机

Also Published As

Publication number Publication date
ITUD20020226A1 (it) 2004-04-29
ATE455605T1 (de) 2010-02-15
ITUD20020226A0 (it) 2002-10-28
ES2339757T3 (es) 2010-05-25
EP1415734B1 (de) 2010-01-20
DK1415734T3 (da) 2010-05-17
DE60331033D1 (de) 2010-03-11

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