EP1982779A1 - Vorrichtung und Verfahren zur just-in-time Herstellung eines Bewehrungselementes vom Typ Gitterträger - Google Patents

Vorrichtung und Verfahren zur just-in-time Herstellung eines Bewehrungselementes vom Typ Gitterträger Download PDF

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Publication number
EP1982779A1
EP1982779A1 EP07150103A EP07150103A EP1982779A1 EP 1982779 A1 EP1982779 A1 EP 1982779A1 EP 07150103 A EP07150103 A EP 07150103A EP 07150103 A EP07150103 A EP 07150103A EP 1982779 A1 EP1982779 A1 EP 1982779A1
Authority
EP
European Patent Office
Prior art keywords
wires
latticework
manufacturing
reinforcement structures
forming
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.)
Withdrawn
Application number
EP07150103A
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English (en)
French (fr)
Inventor
Sandro Miconi
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.)
Promostar Srl
Original Assignee
Promostar Srl
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 Promostar Srl filed Critical Promostar Srl
Publication of EP1982779A1 publication Critical patent/EP1982779A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F27/00—Making wire network, i.e. wire nets
    • B21F27/12—Making special types or portions of network by methods or means specially adapted therefor
    • B21F27/20—Making special types or portions of network by methods or means specially adapted therefor of plaster-carrying network
    • 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
    • B21F1/04—Undulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F11/00—Cutting wire

Definitions

  • the present invention refers to an apparatus for a just-in-time manufacture of latticework-like wire structures intended as reinforcement structures for beams and girders, such as in particular concrete beams and girders; it also refers to the related manufacturing method.
  • a latticework-like reinforcement of this kind suiting the particular application is comprised of a pair of metal wires - generally termed lower longitudinal stringers in the art - extending at the same level in a mutually parallel arrangement, and joining to a third metal wire - generally termed upper longitudinal stringer in the art - extending parallel to the lower stringers, but at a different level relative thereto.
  • the connection of the lower longitudinal stringers with the upper longitudinal stringer is done by welding a further pair of wires that are previously bent to form two corresponding undulate brackets.
  • Latticework-like reinforcements of the above-described kind are manufactured with the aid of rather complicated equipment, starting generally from coiled wire, i.e. wire wound on reels. According to the manufacturing methods generally used nowadays, these wires are first unwound from the reels, then properly positioned in accordance with the shape that the lattice-work-like reinforcement is due to take, and straightened so as to level them out by eliminating the curvature due to the wire having been wound on the reels.
  • the wires that are due to form the afore-cited welding brackets are bent so as to take an undulate pattern and - jointly with the wires forming the longitudinal stringers - they are then conveyed towards the welding units that will electrically weld the thus formed brackets onto the longitudinal stringers.
  • the thus formed latticework-like reinforcement is cut to desired length with the aid of appropriate cropping machines and is eventually sent to the packaging station.
  • latticework manufacturing apparatus in which the latticework-like reinforcement structures are made starting from bundles of wires that are pre-cut to the desired length and are delivered in this state to the required forming and welding operations.
  • Apparatuses of this kind are designed to mass-produce a large number of lots of invariably identical latticework-like reinforcements, and do not provide any possibility for variations to be introduced in the process so as to cope with desired changes in the dimensions of the wires or rods that make up the latticework-like reinforcements being produced, such as for instance changes in the wire or rod diameter or variations in the pitch, or spacing pattern, and the height of the curvatures imparted to the wires or rods forming the welding brackets.
  • apparatuses of the above-described kind cannot be used in any such case in which some kind of just-in-time manufacturing scheme is needed or desired, i.e.
  • Another purpose of the present invention is to provide a manufacturing apparatus and method, which enable latticework-like beam reinforcements in a wide range of sizes, in particular having longitudinal wire stringers and welding brackets with diameters that can be selected to comply with varying needs, to be produced.
  • Yet another purpose of the present invention is to provide an apparatus for producing latticework-like beam reinforcements, which is capable of being derived from an existing prior-art apparatus through a reduced number of modifications.
  • the apparatus comprises a first in-feeding unit 1 adapted to supply a plurality of first wires that are substantially rectilinear in form.
  • first in-feeding unit works by withdrawing wires that are wound on reels, using appropriate unwinding machines to this purpose; the thus withdrawn wires are then straightened out and cut to the desired length by means of appropriate cutting tools.
  • the in-feeding unit 1 may be adapted to withdraw, i.e. take in wires that are pre-cut according to the length that the latticework-like beam reinforcements to be produced are due to have at the end of the fabrication process.
  • the diameter i.e.
  • gauge of the wires supplied by the first in-feeding unit may be varied according to actual needs and requirements by means of appropriate machines that are inherently known as such in the art and, in particular, are adapted to effect, i.e. carry out a reduction in the diameter or gauge of the wires.
  • the wires supplied by the first in-feeding unit will be used as the longitudinal stringers needed to form each latticework-like beam reinforcement.
  • a second in-feeding unit 2 uses appropriate forward-moving and positioning means to supply a plurality of second wires having diameters that differ from each other to a so-called selection unit 3 that is capable of selecting such wires on the basis of, i.e. according to the diameter or gauge thereof.
  • the selection process is carried out in accordance with the type of latticework-like beam reinforcement that is due to be produced, as well as the extent or amount of reinforcement that it is required to impart to the beam or girder in which it is going to be embedded.
  • these second wires which will form the brackets used in the fabrication of the latticework-like beam reinforcement, are supplied into a forming unit 4, in which they are preferably formed according to an undulate pattern and eventually cut to the desired length and size.
  • a forming unit 4 will be described in greater detail below with reference to Figures 2 and 3 .
  • the brackets that are formed by and output from the forming unit 4 are conveyed towards a welding unit 5, which also receives the afore-cited first wires, i.e. the longitudinal stringers being supplied by the first in-feeding unit 1.
  • This welding unit 5 works by electrically welding the brackets onto the longitudinal stringers so as to complete the latticework-like beam reinforcement structure.
  • the forming unit 4 comprises forming means 6 interposed, i.e. provided between two respective clamping means 7 and 8 that are generally constituted by pincers or similar tools that are adapted to grip a wire 9.
  • the forming means 6 comprise a translationally moving pushing member, the length or extent of the translational displacement of which can be adjusted with the aid of appropriate adjustment means as they are largely known as such in the art, so as to enable the wire 9 to be formed according to a wide variety of shape patterns.
  • Further clamping means may be provided for association with the forming means 6.
  • the forming unit comprises a single movable pincer 7 and a second stationary pincer 8.
  • the motion of the pincer 7 is a linear one and is operated with the aid of appropriate driving means 10, such as a rack-and-gear drive, a sliding-shoe drive or other straight-line motion mechanisms of any kind generally known as such in the art.
  • Further motion imparting means 10 may be provided to vary the distance between the forming means 6 and each one of the pincers 7, 8 associated therewith, in view of forming along the wire 9 a pattern of waves or corrugations in a wide range of shapes, such as corrugations in the shape of an isosceles triangle, a right-angled triangle, etc.
  • the pitch and the height of the waves, i.e. corrugations formed on the wire 9 can be varied by acting on the adjustment means provided to adjust the travel, i.e. the displacement of the pushing member associated to the forming means 6, whereas the movement of the wire 9 is controlled by proper forward-moving and positioning means 13 during the forming process thereof.
  • the forming unit 4 is provided with cutting means 14, which enable the wire 9 to be cut off at a region thereof corresponding to a bend formed thereon or at any other region of the wire 9, as the case may be.
  • cutting means 14 may be provided and accommodated within or in close association with either one or both pincers 7, 8 and/or the forming means 6 themselves.
  • the wire 9 can be cut off at a point corresponding to the crests 15 and/or the roots 16 formed thereon, or at any other point of the wire 9.
  • the wire 9 has desirably to be cut off at a crest 15, the same wire is solely clamped by the pincer 8 situated downstream from the forming means 6.
  • the manufacturing apparatus according to the present invention is fully able to be advantageously implemented with just a few modifications starting from any existing prior-art equipment of the same kind, i.e. used to manufacture latticework-like beam reinforcement structures in the traditional manner.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Paper (AREA)
  • Hydroponics (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
EP07150103A 2007-04-18 2007-12-19 Vorrichtung und Verfahren zur just-in-time Herstellung eines Bewehrungselementes vom Typ Gitterträger Withdrawn EP1982779A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITPN20070023 ITPN20070023A1 (it) 2007-04-18 2007-04-18 Impianto e procedimento per la produzione "just-in-time" di tralicci di rinforzo per travi

Publications (1)

Publication Number Publication Date
EP1982779A1 true EP1982779A1 (de) 2008-10-22

Family

ID=39651242

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07150103A Withdrawn EP1982779A1 (de) 2007-04-18 2007-12-19 Vorrichtung und Verfahren zur just-in-time Herstellung eines Bewehrungselementes vom Typ Gitterträger

Country Status (2)

Country Link
EP (1) EP1982779A1 (de)
IT (1) ITPN20070023A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102389930A (zh) * 2011-10-13 2012-03-28 无锡威华电焊机制造有限公司 钢筋桁架腹杆筋打弯成形装置
CN102500721A (zh) * 2011-10-09 2012-06-20 宁波新州焊接设备有限公司 钢筋桁架自动焊接生产线的钢筋桁架折弯机构
CN105170746A (zh) * 2015-08-28 2015-12-23 风范绿色建筑（常熟）有限公司 桁架焊机波浪成形结构
CN106541057A (zh) * 2016-12-16 2017-03-29 张家港市联盛塑业有限公司 一种自动测量标记的钢筋裁剪装置
CN109604485A (zh) * 2018-11-29 2019-04-12 重庆工程职业技术学院 一种建筑工程钢筋加工装置
WO2022127056A1 (zh) * 2020-12-18 2022-06-23 建科机械（天津）股份有限公司 桁架底脚切断装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB707525A (en) * 1951-11-30 1954-04-21 Hans Peter Georgh New or improved machine for the production of pile reinforcements from metal wire
EP0355776A2 (de) * 1988-08-23 1990-02-28 Hugo Bittlmayer Verfahren zum Bewehren von Betonplatten, Vorrichtung zur Durchführung des Verfahrens sowie Gitterträger
DE10037281A1 (de) * 1999-07-28 2001-05-03 Franz Filzmoser Vorrichtung zum Herstellen eines Gitterträgers
EP1199117A2 (de) * 2000-10-10 2002-04-24 Giuliana Guerrieri Vorrichtung zum Biegen von drahtförmigem Metallgut, insbesondere von Rundstäben

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB707525A (en) * 1951-11-30 1954-04-21 Hans Peter Georgh New or improved machine for the production of pile reinforcements from metal wire
EP0355776A2 (de) * 1988-08-23 1990-02-28 Hugo Bittlmayer Verfahren zum Bewehren von Betonplatten, Vorrichtung zur Durchführung des Verfahrens sowie Gitterträger
DE10037281A1 (de) * 1999-07-28 2001-05-03 Franz Filzmoser Vorrichtung zum Herstellen eines Gitterträgers
EP1199117A2 (de) * 2000-10-10 2002-04-24 Giuliana Guerrieri Vorrichtung zum Biegen von drahtförmigem Metallgut, insbesondere von Rundstäben

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MEP: "AUTOMATIC PRODUCTION OF REBAR FROM WIRE UP TO 16 MM", WIRE INDUSTRY, MAGNUM PUBLICATIONS LTD. OXTED, GB, vol. 63, no. 751, 1 July 1996 (1996-07-01), pages 462, XP000622583, ISSN: 0043-6011 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102500721A (zh) * 2011-10-09 2012-06-20 宁波新州焊接设备有限公司 钢筋桁架自动焊接生产线的钢筋桁架折弯机构
CN102500721B (zh) * 2011-10-09 2013-10-30 宁波新州焊接设备有限公司 钢筋桁架自动焊接生产线的钢筋桁架折弯机构
CN102389930A (zh) * 2011-10-13 2012-03-28 无锡威华电焊机制造有限公司 钢筋桁架腹杆筋打弯成形装置
CN102389930B (zh) * 2011-10-13 2014-02-05 无锡威华电焊机制造有限公司 钢筋桁架腹杆筋打弯成形装置
CN105170746A (zh) * 2015-08-28 2015-12-23 风范绿色建筑（常熟）有限公司 桁架焊机波浪成形结构
CN106541057A (zh) * 2016-12-16 2017-03-29 张家港市联盛塑业有限公司 一种自动测量标记的钢筋裁剪装置
CN109604485A (zh) * 2018-11-29 2019-04-12 重庆工程职业技术学院 一种建筑工程钢筋加工装置
CN109604485B (zh) * 2018-11-29 2020-05-08 重庆工程职业技术学院 一种建筑工程钢筋加工装置
WO2022127056A1 (zh) * 2020-12-18 2022-06-23 建科机械（天津）股份有限公司 桁架底脚切断装置

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Publication number Publication date
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