EP1152846B1 - Maschine zur herstellung von trägern - Google Patents

Maschine zur herstellung von trägern Download PDF

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Publication number
EP1152846B1
EP1152846B1 EP00903800A EP00903800A EP1152846B1 EP 1152846 B1 EP1152846 B1 EP 1152846B1 EP 00903800 A EP00903800 A EP 00903800A EP 00903800 A EP00903800 A EP 00903800A EP 1152846 B1 EP1152846 B1 EP 1152846B1
Authority
EP
European Patent Office
Prior art keywords
wire
truss
clamp
zigzag
wires
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.)
Expired - Lifetime
Application number
EP00903800A
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English (en)
French (fr)
Other versions
EP1152846A1 (de
Inventor
Tom Gould
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.)
Structherm Ltd
Original Assignee
Structherm Ltd
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 Structherm Ltd filed Critical Structherm Ltd
Publication of EP1152846A1 publication Critical patent/EP1152846A1/de
Application granted granted Critical
Publication of EP1152846B1 publication Critical patent/EP1152846B1/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
    • 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
    • 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

Definitions

  • the invention relates to a machine for producing trusses, in particular for trusses for use in building panels.
  • Truss fabrication machines are known in the art but typically such machines are constructed so that they can only produce building panels of a single particular width. If panels having a variety of dimensions are to be made, the machine generally has to be extensively modified. This is clearly undesirable as it results in the loss of production facilities. The alternative is to have a number of machines.
  • a prior art apparatus for manufacture of a wire truss is disclosed in W096/31314.
  • the apparatus comprises two chains which are driven round preformed tracks by a chain drive.
  • Each chain supports pivotally mounted arms which swing out into contact with the wire to bend the wire into a zigzag shape.
  • the dimensions of the zigzag are determined by the size and spacing of the arms and hence the distance between the chains.
  • the apparatus cannot therefore be easily modified to produce to produce trusses having different dimensions. The only practical solution to provide a machine for each size of truss desired.
  • the zigzag wire forming means comprises a rear clamp, a transverse displacement die and a pair of blocking dies. Once the zigzags have been formed the wire is fed into a wire guide formed of two sections fixed to the machine bed. This arrangement again produces zigzag wire having fixed dimensions.
  • US 4,372,350 discloses a machine for manufacturing welded lattice girders.
  • the zigzag wire forming means comprises two bending levers which pivot to place the wire on wire deflector pins carried by two endless chains.
  • girders of different heights may be produced on the same machine, no means are provided to change the dimensions of the zigzag wires themselves.
  • the present invention therefore seeks to provide a machine for making trusses, the dimensions of which trusses can easily be changed.
  • an apparatus for making a truss comprising wire supply means adapted to supply a plurality of wires, first wire feeder means, which first wire feeder means is adapted to feed a wire to wire forming means, which wire forming means is adapted to form said wire into a zigzag shape, wire incrementation means being provided to draw said wire through said wire forming means and being provided with clamp means adapted to clamp the or each wire, the wire forming means comprising a swinging pin arrangement driveable by pneumatic means, the swinging pin arrangement applying a folding force to the wire, the apparatus being characterized in that it further includes control means adapted to control the frequency of the pin oscillations and means for adjusting the amount of wire fed into the wire forming means, such that the dimensions of the zigzag are alterable.
  • the apparatus according to the invention advantageously facilitates the production of trusses in a variety of dimensions, by controlling the frequency of the pin oscillations, in contrast to the known machines which require substantial modification before the dimensions can be altered.
  • the more cost effective production of trusses having different dimensions reduces the cost of such trusses and enables their economic use in a wider range of building specifications than has been possible.
  • the truss incrementation means comprise one or more reciprocating means and associated clamp means adapted to clamp the or each wire at least during a forward stroke of the reciprocating means.
  • the machine is driven via a motor driven camshaft, which camshaft may be provided with sensors to detect the position of the cams, wherein the output of the sensors is input to a control unit, which control unit sequences the various driving means and switches.
  • the machine further comprises welding means adapted to weld second and third wires supplied by said wire supply means to said first wire, wherein the position of at least some of the welding means is adjustable to cope with changes in truss dimensions.
  • the apparatus is constructed in two halves which are mirror images of each other.
  • the wire supply means comprises two powered multi decoiler units on each of which three coils of wire can be mounted.
  • the wire supply means is provided with a control system to ensure that the wire 1,2,3 can be decoiled without any snatching.
  • a sensor on each wire supply detects whether the particular wire supply has been exhausted or not.
  • Each wire 1,2,3 is fed to a wire straightener through a hardened location hole 4a-c, which hole helps to prevent any wire entanglement.
  • a series of mutually spaced discrete holes 4a-f is provided to enable the width of the truss to be varied.
  • the wire straightener comprises twin-plane roller straightener arrangements formed of adjacent vertical 7a-c and horizontal groups 8a-c of rollers.
  • the vertical and horizontal planes of each arrangement have seven rollers arranged in two banks of three and four rollers, respectively.
  • the position of the rollers is adjustable to allow for re-positioning of the wires for varying the width of the truss.
  • the wires are fed through the straightener arrangements which also serve to maintain the tension in the wires. The tensioning also facilitates the tight forming of the zigzag wire.
  • After passing through the straighteners the wires are fed through hardened location holes. A number of hardened location holes are provided to facilitate the production of the different width trusses.
  • One of the wires is drawn through the wire straightener and fed to the wire former 10 by means of a reciprocating unit.
  • This unit comprises a first pneumatic clamp mounted on a reciprocating plate.
  • a further pneumatic clamp which is fixed to the machine bed, is provided to act as a backstop.
  • This backstop clamp is actuated when the reciprocating unit is on the return stroke to ensure that the wire does not return to the straightener or become entangled in any way.
  • the first pneumatic clamp will clamp the wire on the forward stroke and hence draw it through the straightener. At the end of the forward stroke, the first clamp is released and the backstop clamp is actuated to prevent any return of the wire.
  • the wire former 10 comprises a pneumatically operated swinging pin device 11 which also assists in drawing the wire fed in by the reciprocating unit.
  • the swinging pin device comprises a pin 12 mounted on a forming arm 13, which forming arm is pivotally mounted on the zigzag forming unit (all part of the second reciprocating carriage).
  • a pneumatically operated cylinder 14 is connected to the forming arm and is adapted to drive the pivotal motion of the arm.
  • the pin 12 is reciprocated between two positions in one of which positions it applies a folding force to the wire 2 to form the wire 2 into a zigzag. In the other position it is clear of the wire and returns to its home position.
  • the wire 2 is engaged by a series of pins 15 fixed to a second reciprocating carriage 16, which carriage then transports the wire to the welding unit.
  • the reciprocating carriage is provided with a series of 25mm vertically spaced tapped holes, into which half of the clamping unit can be repositioned, thereby facilitating the transport ofa variety of different widths.
  • the dimensions of the zigzag are determined by the amount of wire fed in by the first reciprocating unit (adjustable by an eccentric pin on the unit's motor) and the dimensions of the forming arm.
  • Control means are provided for the pneumatically operated cylinder driving the forming arm, which control means control the frequency of the pivotal motion and hence the dimensions of the zigzag.
  • each part of the zigzag 2 is successively engaged by one of a series of pins 15 fixed to the second reciprocating carriage 16.
  • This second reciprocating carnage thus carries the zigzag wire along to the next stage of the machine, the welding station.
  • Each of the pins is adjustable in position to facilitate the take up of different truss sizes.
  • the second reciprocating unit 16 is also provided with a clamping unit to clamp the line wires and hence draws the line wires forward into the welding station.
  • Each line wire 1,3 has a respective clamping unit.
  • the clamping unit is formed in two parts, each part being provided with a hardened pad. One part is position fixed to the reciprocating carriage and the other is adjustable, so that different truss sizes can be accommodated.
  • the clamping unit there are several hardened pads that clamp the line wires.
  • One side of each pair of pads is fixed into position.
  • the gap that the line wires goes through can be adjusted by means of a screw as the second pad is free in one plane only.
  • the adjusting screw has a lock nut to secure its position.
  • the welding station comprises four pneumatically operated electrical resistance units, two for each truss. Each pair of welding units is employed at each edge of the zigzag wire/truss substantially simultaneously. Each of the welding units is separate and is individually fixed to the machine bed. Each welding head is also provided with its own transformer.
  • the welding station is provided with a cooling system to reduce the prospect of any overheating.
  • the cooling system comprises pumping water from a reservoir through the transformers and welding heads, and then back to a reservoir.
  • the second reciprocating unit 16 draws the line wires 1,3 forward and moves the nodes of the zigzag wire 2 over the welding heads.
  • the node of each zigzag 2 lies adjacent to but not completely co-axial to the respective line wire 1,3.
  • the welding head then welds the zigzag wire 2 to each of the respective line wires 1,3.
  • This welding action also acts as a clamping action thereby permitting the clamping unit 18 on the second reciprocating carriage to release the line wires and to return to its datum, where it can clamp the line wires again.
  • a guillotine is provided for each truss and has twin blades wide enough to cut any size of truss. Each of the twin blades is provided with four cutting edges.
  • the guillotine is hydraulically operated so that high tensile strength wire can be cut.
  • the truss After being cut by the guillotine the truss is removed either by hand or collected in a tote bin.
  • the main movements of the apparatus e.g. the wire former and the incrementation of the wires through the machine are controlled by a pair of motor driven camshafts.
  • the various pneumatic clamping units are also driven from the PLC via pneumatic actuators.
  • Sensors detect the positions of the reciprocating carriage and the cams and input this to a PLC, which then sequences the pneumatic powered functions and in particular synchronises the switching of the pneumatic valves for the main forming movements of the zigzag wire.
  • the sensors comprise two proximity sensors located on the machine bed, which are able to detect when the reciprocating carriages are at their home positions.
  • the camshafts are driven by an AC induction motor with a variable drive for speed variation.
  • This speed variation together with the control of the pneumatic valves enables the dimensions of the trusses to be altered.
  • the motor is driven from a 3-phase supply and so as the motor rotates, the amount of supply drawn will vary. This variation enables an accurate calculation of how far the motor has rotated in each cycle. If for example, a single revolution of the motor relates to a single cycle of the truss forming process, the control computer can translate the information on how far the motor has revolved to determine how far the whole machine is into the cycle. To make finer adjustments to each truss type, it is necessary to physically adjust the position of the eccentric cam.
  • the zigzag forming unit, the welding unit, the truss clamping unit and the guillotine clamping unit are all split into two halves.
  • the machine edge side is position fixed, whilst the side facing the machine centreline is adjustable.
  • a series of tapped holes is provided at typically 25mm intervals, through which one of the wires is fed, thereby enabling the width of a unit to increased or decreased to accept the different width trusses. Therefore two of the hardened location holes on the fixed side of the adjustable units are always used, being fed by the zigzag wire and one line wire. One of the other available hardened location holes is thus used to vary the size of the truss being produced.
  • each wire may be either untreated mild steel, galvanised electroplated steel or stainless steel. Additionally each wire may have a diameter of 2, 3 or 4 mm, except the zigzag wire which is only 2 or 3mm.
  • Exemplary specifications of the trusses producible by the apparatus are as follows: Minimum Maximum Truss length 50mm infinite Truss width 75mm 150mm Truss pitch 100mm 200mm
  • increments in the truss length are 50mm and in the width 25mm.
  • the apparatus of the invention will typically produce a standard truss of 2.450m at the rate of 375 an hour, although 150mm wide trusses may be produced at up to 440 an hour.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Holo Graphy (AREA)
  • Magnetic Heads (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Transplanting Machines (AREA)
  • Manufacturing And Processing Devices For Dough (AREA)
  • Formation And Processing Of Food Products (AREA)

Claims (5)

  1. Ein Apparat zur Herstellung eines Fachwerks, bestehend aus einem Drahtzufuhrmittel zur Zufuhr von mehreren Drähten (1, 2, 3), wobei das erste Drahtzufuhrmittel so ausgelegt ist, dass es einen Draht einem Drahtformungsmittel (10) zuführt, und wobei das Drahtformungsmittel (10) so ausgelegt ist, dass es den Draht zu einer Zickzackform formt, ferner bestehend aus einem Drahtziehmittel (16), das den Draht durch das Drahtformungsmittel zieht und mit einem Klemmmittel (15) versehen ist, das so ausgelegt ist, dass es den Draht oder jeden der Drähte (1, 2, 3) festklemmt, wobei das Drahtformungsmittel (10) eine Schwenkstiftanordnung (12, 13) umfasst, die durch ein pneumatisches Mittel (14) angetrieben werden kann, wobei die Schwenkstiftanordung (12, 13) eine Faltkraft auf den Draht (2) ausübt; der Apparat ist dadurch gekennzeichnet, dass er weiterhin ein Steuermittel umfasst, dass so ausgelegt ist, dass es die Frequenz der Hin- und Herbewegungen des Stifts kontrolliert, sowie ein Mittel zur Einstellung der Drahtmenge (2), die dem Drahtformungsmittel (10) zugeführt wird, so dass die Dimensionen der Zickzackform verändert werden können.
  2. Ein Apparat nach Anspruch 1, dadurch gekennzeichnet, dass das Drahtziehmittel ein oder mehrere Hin- und Herbewegungs-Mittel (16) umfasst, wobei das Klemmmittel (15) so ausgelegt ist, dass es den Draht oder jeden der Drähte (1, 2, 3) zumindest während der Vorwärtsbewegung des Hin- und Herbewegungs-Mittels (16) festklemmt.
  3. Ein Apparat nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Maschine über eine motorisch betriebene Nockenwelle angetrieben wird, wobei die Nockenwelle mit Sensoren ausgestattet ist, die die Position der Nocken erfassen, wobei die Ausgabe der Sensoren einer Steuereinheit zugeführt wird, die den sequenziellen Ablauf der verschiedenen Antriebsmittel und Schalter steuert.
  4. Ein Apparat nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, das der Apparat einen weiteren Apparat neben dem ersten Apparat umfasst, wobei der weitere Apparat spiegelgleich zum ersten Apparat ausgelegt ist.
  5. Ein Apparat nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Apparat weiterhin Schweißmittel umfasst, die so ausgelegt sind, dass sie den zweiten und dritten Draht, der von den Drahtzufuhrmitteln zugeführt wird, mit dem ersten Draht verschweißen, wobei die Position mindestens einiger der Schweißmittel so verstellbar ist, dass die Fachwerkgröße verändert werden kann.
EP00903800A 1999-02-10 2000-02-10 Maschine zur herstellung von trägern Expired - Lifetime EP1152846B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9903006 1999-02-10
GB9903006A GB2346575B (en) 1999-02-10 1999-02-10 Truss machine
PCT/GB2000/000404 WO2000047347A1 (en) 1999-02-10 2000-02-10 Truss machine

Publications (2)

Publication Number Publication Date
EP1152846A1 EP1152846A1 (de) 2001-11-14
EP1152846B1 true EP1152846B1 (de) 2003-11-26

Family

ID=10847491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00903800A Expired - Lifetime EP1152846B1 (de) 1999-02-10 2000-02-10 Maschine zur herstellung von trägern

Country Status (6)

Country Link
EP (1) EP1152846B1 (de)
AT (1) ATE254971T1 (de)
AU (1) AU2556500A (de)
DE (1) DE60006786D1 (de)
GB (1) GB2346575B (de)
WO (1) WO2000047347A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101214524B (zh) * 2008-01-16 2012-02-22 武汉华之洋光电系统有限责任公司 一体化钢丝网架成型机
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
CN104399843A (zh) * 2014-12-02 2015-03-11 浙江伟联科技有限公司 一种附筋成型装置

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* Cited by examiner, † Cited by third party
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AT413342B (de) * 2003-08-27 2006-02-15 Evg Entwicklung Verwert Ges Verfahren und vorrichtung zum herstellen eines gitterträgers
GB2438016A (en) * 2006-04-12 2007-11-14 Frank William Layzell A system for manufacturing ladder trusses
AT511656B1 (de) 2011-06-30 2015-01-15 Progress Maschinen & Automation Ag Verfahren und einrichtung zur kontinuierlichen herstellung eines gitterträgers
CN102921841A (zh) * 2012-11-28 2013-02-13 无锡威华电焊机制造有限公司 钢筋桁架倍比驱动装置
CN103008500B (zh) * 2012-12-05 2014-12-10 建科机械（天津）股份有限公司 桁架焊接生产线的桁架地脚折弯机构
CN103357795B (zh) * 2013-07-17 2015-04-22 建科机械（天津）股份有限公司 一种可调高度的桁架弦筋步进输送机构
FR3030011B1 (fr) * 2014-12-11 2016-12-30 Technip France Procede de montage d'un embout de connexion d'une conduite tubulaire flexible et dispositif permettant de mettre en oeuvre ce procede
CN104772418B (zh) * 2015-03-18 2016-08-24 建科机械（天津）股份有限公司 钢筋桁架生产线中的弦筋步进装置
EP3141314A1 (de) * 2015-09-09 2017-03-15 EVG Entwicklungs- u. Verwertungs- Gesellschaft m.b.H. Verfahren und vorrichtung zum herstellen eines kontinuierlichen gitterträgers
CN111229984A (zh) * 2020-03-23 2020-06-05 王卫锋 一种建筑施工用钢筋折弯装置

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GB565797A (en) * 1943-07-29 1944-11-28 Trussed Concrete Steel Co Improvements in and relating to the manufacture of trussed steel (or other metal) structural members
DE1166734B (de) * 1961-01-27 1964-04-02 Rheinbau Gmbh Einrichtung zum Herstellen von Gitterschlangen aus Draht in Zick-Zack-Form
BE622684A (de) * 1961-10-27
GB1141843A (en) * 1965-05-10 1969-02-05 Dominion Bridge Co Ltd Method of and apparatus for the fabrication of individual metal joists
US3487861A (en) * 1967-08-29 1970-01-06 Stryco Mfg Co Truss making and method
DE2063041C3 (de) * 1970-11-26 1974-04-25 Franz Wels Oberoesterreich Filzmoser (Oesterreich) Einrichtung zum Biegen von Stäben u.dgl
AT317648B (de) * 1970-12-10 1974-09-10 Evg Entwicklung Verwert Ges Einrichtung zum zick-zackförmigen Verlegen eines Drahtes für eine Trägerausfachung od.dgl.
US4161110A (en) * 1977-04-28 1979-07-17 EVG Entwicklungs- und Verwertungs-Gesellschaft mbH. Automatic control device for a bending machine
US4291732A (en) * 1979-02-26 1981-09-29 Covington Brothers, Inc. Method and apparatus for manufacture of wire truss and sinuous strut therefor
AT365486B (de) * 1979-08-03 1982-01-25 Evg Entwicklung Verwert Ges Maschine zum selbsttaetigen herstellen von geschweissten gittertraegern
SE440318B (sv) * 1983-10-31 1985-07-29 Wirewood Ab Sett och anordning for bockning av trad till sicksackform
AU5283496A (en) * 1995-04-05 1996-10-23 Fastrac Building Systems Limited Building panel machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101214524B (zh) * 2008-01-16 2012-02-22 武汉华之洋光电系统有限责任公司 一体化钢丝网架成型机
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
CN104399843A (zh) * 2014-12-02 2015-03-11 浙江伟联科技有限公司 一种附筋成型装置
CN104399843B (zh) * 2014-12-02 2016-08-17 浙江伟联科技有限公司 一种附筋成型装置

Also Published As

Publication number Publication date
EP1152846A1 (de) 2001-11-14
ATE254971T1 (de) 2003-12-15
WO2000047347A1 (en) 2000-08-17
GB9903006D0 (en) 1999-03-31
GB2346575B (en) 2003-05-14
DE60006786D1 (de) 2004-01-08
AU2556500A (en) 2000-08-29
GB2346575A (en) 2000-08-16

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