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
  • B21F15/00—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire
  • B21F15/02—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire
  • B21F15/06—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire with additional connecting elements or material
  • B21F15/08—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire with additional connecting elements or material making use of soldering or welding
• • 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
  • B21F27/08—Making wire network, i.e. wire nets with additional connecting elements or material at crossings
  • B21F27/10—Making wire network, i.e. wire nets with additional connecting elements or material at crossings with soldered or welded crossings

Definitions

• the invention relates to a method and device for producing a lattice girder from at least one upper chord, at least one lower chord and at least one infill wire, which is bent back and forth between the upper and lower chord, is bent in a zigzag shape, has bending apices on the upper chord and lower chord side and is welded to the upper and lower chords , Lattice girders with an upper chord and two lower chords, which are connected to the upper chord by zigzag-shaped infill wires, are used in a variety of ways in construction.
• the lattice girder is supported on the support via the lower chord ends, so that the load capacity of the lattice girder ends depends on whether or to what extent the lower chords protrude beyond the last weld connection of the lower chord wires with the infill wires.
• the object of the invention is to avoid the disadvantages of the prior art and to create a method and a device of the type specified in the introduction, which make it possible to use lattice girders with at least one upper chord, at least one lower chord and with at least one between the upper and lower chords back and forth infill wire in simple rather to manufacture in such a way that lattice girders of any length can be produced, the bottom and top ends of which are closed by a welding knot, so that their maximum load-bearing capacity can be exploited regardless of the respective length, and which can also absorb additional shear forces in the support area.
• the invention also has the object to provide a device which makes it possible to attach at least one lattice girder with the necessary stability on a formwork sheet, in which case the lattice girder must also be able to be produced in any length, but the end of the lattice girder in the area of The vertex of the infill wires lies.
• a method for producing a lattice girder from at least one upper chord, at least one lower chord and at least one bracing apex which runs back and forth between the upper and lower chord has bending apices on the upper chord and lower chord side and is welded to the upper and lower chord from that the distance between adjacent bending vertices of the infill wires within a lattice girder is selected differently, preferably at the ends of the lattice girder the distance is chosen narrower than in the central region of the lattice girder, that the lower chord can be fed in different feed planes and that the lattice girder in predetermined cutting positions is separated from the continuously produced strand of material.
• the lattice girder When viewed in the direction of production, the lattice girder is preferably cut off immediately behind the welding node formed by the lower chords and the bending crests on the lower chord side. Alternatively, the lattice girder is cut off in the crests of the infill wires on the lower chord side. According to another embodiment, the lattice girder is seen in the production direction immediately behind that of the Upper chord and the welding knots formed on the upper chord side bending vertices are separated.
• the protrusions of the infill wires protruding beyond the lower chords are bent outwards or inwards from the plane of the infill wires at predetermined angles, the bent protrusions preferably lying in a horizontal plane when they are bent outwards.
• the protrusion of the infill wire protruding beyond the lower chords can be bent alternately to the left and to the right in a horizontal plane, as seen in the production direction.
• the lattice girders are connected with their bent overhangs of the infill wires to a formwork sheet, preferably welded.
• the invention also relates to a device for carrying out the method, with feed devices for the upper and lower chord wires and the infill wires, with a bending device for the infill wires, with welding devices for connecting the infill wires to the upper chord and the lower chords, with two centering devices for fixing the bending crest on the lower chord side relative to the upper chord welding device, with a separating device for cutting the welded lattice girder to length, and a stacking device;
• This device is characterized according to the invention in that a pivotable centering device downstream of the bending device is provided for fixing the bending crests on the lower chord side, which together with the centering devices for fixing the crest on the lower chord side can be pivoted relative to the upper chord welding device, in that the centering devices for fixing the crest on the lower chord side relative to the upper chord welding device both in their opposite side distance as well as in their distance from the fixing centering device and the welding devices for the lower chords depending on the predetermined distances of the bending crests
• the centering device is preferably fixedly connected to a pivot shaft mounted rotatably on a frame, and the welding device for the upper chord can be displaced parallel to the production direction depending on the spacing of the bending apex.
• the centering device can be moved parallel to the direction of production and is rotatably mounted on the swivel shaft depending on the spacing of the bending apex, and the welding device for the upper chord is stationary on the
• the centering devices which are adjustable in their mutual distance, can be adjusted with a different adjusting ratio by means of a common adjusting device.
• a bending device which is displaceable relative to the separating device and is arranged downstream of this is preferably provided for bending the protrusions of the infill wires projecting beyond the lower chords from the plane of the infill wires.
• the feed devices, the welding device, the cutting device for the lower chords and the cutting device for the lower chords and the bracing wires can be adjusted in height to adapt to the different feed levels of the lower chords.
• actuators are provided for setting the distances between the bending vertices of the infill wires in the bending device, for displacing the centering devices, the welding devices, the separating devices and the bending device, which actuators can be controlled via a central control device as a function of the predetermined distances between the bending vertices.
• the lattice girders provided with angled projections can finally be fed to the stacking device.
• An alternative device for carrying out the method, in which the lattice girders are connected, preferably welded, with their bent overhangs of the infill wires to a formwork sheet is characterized in that the formwork sheet can be removed from a stacking magazine with the aid of a removal and cross-conveying device It can be transported in the transverse direction and placed on a support table in such a way that at least one lattice girder can be removed from the stacking device with the aid of a transverse conveying and loading device, can be conveyed in the transverse direction and placed on the formwork sheet, that the formwork sheet fitted with lattice girders can be moved with the aid of one that can be moved parallel to the production direction Inserting and extracting device having gripping tongs for a connecting device for fastening the protrusions of the infill wires on the formwork sheet can be transferred in cycles and can be conveyed out of the connecting device t.
• the connecting device is preferably a welding machine which has a pair of welding electrodes for each contact point between the formwork sheet and the infill wire, the electrode pairs being arranged in a welding line running transversely to the production direction.
• FIGS. 1 to 3 shows a schematic plan view of an embodiment of a device according to the invention for welding several lattice girders onto a formwork sheet.
• the device 1 shown in FIGS. 1 to 3 is used to produce a lattice girder G which consists of an upper chord 0, two lower chords U, U 'running parallel to one another and selectively at a distance from the upper chord O, and two each between the upper chord O. and the lower chords U, U 'running back and forth, bent in a zigzag shape with the chord wires O; U, U 'welded infill wires Z, Z'.
• the zigzag bent infill wires Z, Z ' have bending apexes S in the area of the upper chord O and bending apexes S' in the vicinity of the lower chords U, U '.
• the distance between two adjacent top crest side bending apices S or bottom chord side crest apexes S ' is called the division T, T ".
• the distance between the top chord side crest apex S and the bottom chord side crest apex S' is defined as the height of the lattice girder G.
• Pitch T, T "within a lattice girder G may be different, preferably in the area of the supports, that is, in the two end areas of the lattice girders G, a narrower pitch T" is chosen than the pitch T in the central area of the lattice girder G, since in the area of the supports shear forces to be absorbed by the lattice girder G.
• the upper chord 0 runs between the bending chords S of the infill wires Z, Z 'on the upper chord side, while the lower chords U, U' each on the outside or inside of the infill wires Z, Z 'in welding knots Kl, K2 are welded in.
• the lower chords U, U ' lie in a horizontal Z u plausibleeee XX, which runs in the embodiment shown in Fig. 1 above the bending apex S 'of the infill wires Z, Z' with a predetermined selectable distance to the top chord 0.
• the protrusions E protruding over the lower chord wires U, U ' Infill wires Z, Z ' can be bent outward or inward at predetermined selectable angles from the plane of the infill wires Z, Z' within the scope of the invention.
• the protrusions E are bent outwards in such a way that the bent protrusions E 'lie in a horizontally extending plane and thereby give the lattice girder G' a larger support and thus greater stability if this is fastened, preferably welded, to a formwork sheet B with the aid of the device according to the invention shown in FIG. 4.
• the position of the lower chords U, U 'relative to the infill wires Z, Z' essentially depends on the structural requirements for the lattice girder to be produced.
• the feed device 3 has an upper belt clamping device 4, with the aid of which the wire for the upper belt O is intermittently drawn off from a wire supply (not shown) in the production direction P1.
• the feed device 3 also has a lower chord clamping device 5, with the aid of which the wires for the two lower chords U, U 'are withdrawn intermittently from wire supplies (not shown) in the production direction Pl in the feed plane XX.
• the feed device 3 is displaceably arranged on a plurality of running wheels 6, which run on at least one running rail 7 fixedly connected to the frame 2, in accordance with the directions of the double arrow P2.
• the funding The stride length of the upper belt clamping device 4 and the lower belt clamping device 5 can each be adjusted via a crank drive with an eccentric or linear drive.
• the upper belt clamping device 4 can be adjusted in height in accordance with the directions of the double arrow P3 in order to be able to produce lattice girders G with different heights.
• the lower chord clamping device 5 can be adjusted in height in accordance with the directions of the double arrow P4 in order to be able to feed the lower chords U, U 'in different feed planes XX and X'-X' (FIG. 3).
• a bending device 8 for producing the zigzag bent infill wires Z, Z ' is arranged on the frame 2 and is constructed in a conventional manner, for example in accordance with AT-365486 B.
• the wires D, D 'for forming the infill wires Z, Z' are continuously withdrawn from wire supplies, not shown.
• the bending device 8 is able to produce infill wires Z, Z 'with different pitch T, T "and different heights.
• the two infill wires Z, Z' run roof-shaped, the angle between the two infill wires Z, Z '
• the top crests S on the upper chord side are first welded to the top chord 0 with the aid of the welding device 9.
• the welding device 9 consists, for example, of two welding electrodes which can be applied externally to the infill wires Z, Z 'in the welding cycle, as described in the patent specification AT- 365486 B.
• the welding device 9 is arranged on a carriage 10, which can be moved on several running wheels 11 along two stationary rails 12 connected to the frame 2 in accordance with the directions of the double arrow P5 on the carriage 10 is the transformer 13 for the upper belt welding device 9 arranged by means of flexible Stro mcables 14 is connected to the upper chord welding device 9.
• the upper belt 0 is guided in front of the upper belt welding device 9 through an upper belt guide tube 15 with a guide insert 16.
• an upper chute straightening device 17 which essentially consists of a guide plate which can be adjusted parallel to the feed plane XX (perpendicular to the plane of the drawing) and which extends over a plurality of bending vertices S of the infill wires Z, Z 'and has the task of untwisting the upper chord O and any Avoid curvatures, so-called sabers, of the lattice girder G.
• the upper belt welding device 9, the upper belt guide tube 15 together with the guide insert 16 and the upper belt straightening device 17 are arranged on the carriage 10 so as to be height-adjustable in accordance with the directions of the double arrow P6 in order to be able to produce lattice girders G with different heights.
• a fixed centering 18 and a subsequent adjustment centering 19 and a downstream adjusting centering 20 are arranged on the inlet side in front of the upper belt welding device 9, and on the outlet side after the upper belt welding device 9, the centering wires S, Z 'of the infill wires Z, Z' relative to the upper belt 0, the centering 18 , 19, 20 engage in the lower chord side bending apex S 'of the infill wires Z, Z' and cooperate with abutments, not shown, which run between the infill wires Z, Z 'and thus fix the lower chord side bending apex S' of the infill wires Z, Z 'relative to the upper chord O.
• the position of the bending chords S' on the lower chord side in the longitudinal direction of the lower chords U, U ' is also predetermined in dependence on the desired pitch T, T' in the lattice girder G.
• the fixed centering 18 is fixedly connected via a swivel lever 21 to a swivel shaft 22, which in turn is firmly connected to a swivel lever 23 which can be swiveled in accordance with the directions of the double arrow P7.
• a further pivot lever 24, the other end of which carries a guide rail 25, is also firmly connected to the pivot shaft 22.
• a bracket 26 carrying the adjustment centering 19 is non-rotatable, but in accordance with the directions of the double arrow les P8 slidably as well as a further bracket 27 carrying the adjustment centering 20 also rotatably but slidably mounted according to the directions of the double arrow P9.
• the adjustment of the tabs 26, 27 and thus the adjustment of the adjustment centers 19, 20 takes place with the aid of an adjustment device 28, which is only indicated schematically.
• the adjustment device 28 can consist of two controllable hydraulic cylinders or of an adjustment spindle with two threaded sections with different transmission ratios.
• the adjusting centers 19 and 20 are set in their mutual distance and at a distance from the fixed centering 18 depending on the required pitch T, T 'of the infill wires Z, Z', the adjusting centering 20 on the outlet side having a different adjustment path in relation to the Adjustment path of the inlet-side adjustment centering 19 is adjusted in the same direction in order to always ensure the distance required between the fixed centering 18 and the inlet-side adjustment centering 19 as well as between this and the outlet-side adjustment centering 20 due to the desired division T, T '.
• the fixed centering 18 and the two adjusting centers 19 and 20 are intermittently in accordance with the directions of the double arrow P7 is pivoted, as a result of which they are brought into and out of engagement with bending chords S 'on the lower chord and fix them in their position relative to the upper chord welding device 9.
• the adjustment centering 19 is fixedly connected to the pivot shaft 22, while the welding device 9 for the upper chord 0 can be displaced parallel to the direction of production P1 in accordance with the directions of the double arrow P5.
• the welding device 9 for the upper chord 0 in a stationary manner on the frame 2, and the centering 18 Can be moved parallel in and against the direction of production Pl, but non-rotatably on the pivot shaft 22.
• the infill wires Z, Z ' are welded to the lower chord wires U, U' with the aid of a welding device 29, as a result of which each infill wire Z; Z 'is welded to the associated lower flange U, U' at the two welding nodes Kl, K2.
• the welding device 29 consists, for example, of a current bridge arranged between the infill wires Z, Z 'and a welding electrode which can be applied from the outside to the lower chords U, U', as is described in more detail in AT-365486 B.
• the lower chord welding device 29 operates in the same cycle as the upper chord welding device 9.
• the welding device 29 is arranged on a carriage 30 which can be moved on several running wheels 31 along two support rails 32 which are fixedly connected to the frame 2 in accordance with the directions of the double arrow P10.
• the transformer 33 for the bottom flange welding device 29 is arranged on the trolley 30 and is connected to the bottom flange welding device 29 by means of flexible power cables 34.
• the welding device 29 is to be designed.
• the course of the lower chords U, U ' is determined by the static requirements for the lattice girder G and essentially by the later described bending of the protrusions E of the infill wires Z, Z'.
• a guide device 35 is arranged after the lower chord welding device 29, which essentially consists of a guide plate with guide surfaces for the lower chords U, U 'and corresponding roof-shaped flats for the infill wires Z, Z' and for guiding the lower chords U, U 'and Keeping the bending vertex S 'of the infill wires Z, Z' on the lower chord side serves.
• the guide plate extends over several bending vertices S 'of the infill wires Z, Z' and is pivotable perpendicular to the feed plane XX (in the plane of the drawing) and can be tilted about an axis running parallel to the production direction Pl, and is therefore capable of producing a curvature or a puncture occurring during production Compensate lattice girder G.
• the lower chord welding device 29 and the guide device 35 are arranged on the carriage 30 so as to be height-adjustable in accordance with the directions of the double arrow P1, in order to be able to produce lattice girders G with different positions of the lower chords U, U '.
• the finished welded lattice girder G is fed to a separating device 36, with the aid of which the bending crests S 'of the infill wires Z, Z' on the lower chord side are cut according to the desired length of the lattice girder G.
• the separating device 36 has two cutting devices 37, which cut the bending crests S ′ on the lower chord side in the middle of the bending crests S ′.
• the separating device 36 is arranged on a carriage 38, which can be moved on wheels 39 along the support rails 32 which are fixedly connected to the frame 2 in accordance with the directions of the double arrow P12.
• the lattice girder G is then fed to a bending device 40 which bends the protrusions E of the infill wires Z, Z 'projecting beyond the lower chords U, U' in such a way that they bend outwards from the plane of the infill wires Z, Z 'in such a way that the bent protrusions E' in one horizontal plane.
• the so-called feet created in this way increase the support points of the lattice girder G 'accordingly, which gives the lattice girder G' better stability.
• the bending device 40 is also arranged on the carriage 38 and can thus be displaced in accordance with the directions of the double arrow P12.
• the bending device 40 Since the separating device 36 and the bending device 40 must lie in their working positions as precisely as possible in the bending crests S 'on the lower chord side, the bending device 40 is relative to the separating device 36. speaking the directions of the double arrow P13 arranged on the carriage 37. This is particularly important when lattice girders G 'with different divisions T, T "are produced in accordance with the inventive concept.
• a separating device 41 is connected downstream which corresponds to the directions of the double arrow P14 on running wheels 42 along the tra rails 32 can be moved in order to ensure a cutting position which corresponds to the cutting position of the separating device 36.
• the separating device 41 has a cutting device 43 for the upper chord 0 which is height-adjustable in accordance with the directions of the double arrow P15 and a cutting device 44 for the lower chords U, U 'which is likewise height-adjustable in accordance with the directions of the double arrow P16.
• the separated lattice girder G ' is conveyed out of the production line and placed on a stacking device 45 (FIG. 4).
• the detail of the bending device 40 shown schematically in FIG. 2 has a bending tool 46 which can be pivoted in accordance with the directions of the double arrow P17.
• the bending tool 46 is supported from the outside on the infill wire Z, centering being carried out by a correspondingly shaped recess 47 on the lower flange U.
• a counter-holder 48 bears against the inside of the infill wire Z, which deflects the deflection wire Z prevented. If the lower flange U lies on the inside of the infill wire Z, the counter-holder 48 must have a recess which is appropriately adapted to the lower flange U.
• the projection E is bent with the aid of a bending lever 49 which can be pivoted in accordance with the directions of the double arrow P18.
• the bending tool 46 is designed on its surface facing the bending lever 49 in such a way that the bent projection E ', the so-called foot, is in a horizontal plane runs.
• the devices for bending the protrusions E of the infill wire Z ' are designed analogously. Within the scope of the invention it is possible to bend the protrusions E of the infill wires Z, Z 'projecting beyond the lower chords U, U' at selectable angles from the plane of the infill wires Z, Z 'outwards and inwards. In order to set the desired bending angle, the movement of the bending lever 49 is controlled accordingly.
• the bending devices 46, 48 and 49 shown in FIG. 2 are correspondingly arranged in mirror image.
• each filler wire Z, Z ' is welded to the associated lower chord U, U' with only one welding node K.
• the lattice girder G is separated with the aid of an upper and lower belt cutting device 41 'which can be moved in accordance with the directions of the double arrow P'14.
• the welding knot K is more or less wide.
• the cutting position of the upper chord and lower chord cutting device 41 ' must be selected in such a way that the welded connection between the lower chords U, U' and the infill wires Z, Z 'is retained in any case.
• K is just behind the welding node and in the case of wide welding nodes K it can be cut into the.
• the upper chord and lower chord cutting device 41 ' has the cutting device 43 for the upper chord O which is height-adjustable in accordance with the directions of the double arrow P15 and a cutting device 50 which is likewise height-adjustable in accordance with the directions of the double arrow P'16 for the joint severing of the lower chords U, U 'and the infill wires Z, Z' on.
• the separating device 36 and the bending device 40 are inoperative in this exemplary embodiment.
• 3 also shows an end piece of the lattice girder G which has a narrower division T 'at its end than the division T in the adjacent, central region of the lattice girder G.
• the divisions T, T' lie in the region from 180 to 220 mm.
• the device 51 shown schematically in plan view in FIG. 4 is used to weld a plurality of lattice girders G 'onto a formwork sheet B, the formwork sheets B having a plurality of flat ribs R running in the longitudinal direction of the formwork sheets B.
• a formwork sheet B is removed from a stacking magazine 54 with the aid of a removal and cross-conveying device 53 which can be moved on two running rails 52 in accordance with the directions of the double arrow P19, and is transported to a support table 55 in accordance with the direction of the arrow P20 and placed thereon.
• the formwork sheet B is lifted off the stacking magazine, for example with the aid of a lifting magnet or a vacuum suction device.
• the stacking device 45 for the lattice girders G ′ is used to move the transverse conveyor and the crossbars on the two running rails 52 in accordance with the directions of the double arrow P21
• Assembly device 56 removed a lattice girder G 'and conveyed to the support table 55 in accordance with the direction of the arrow P22 and placed on the formwork sheet B there in such a way that the angled projections E' of the infill wires Z, Z 'lie on the ribs R of the formwork sheet B.
• Two support rails 57 adjoin the support table 55, on which an insertion and extraction device 58 can be moved in accordance with the directions of the double arrow P23.
• the insertion and extraction device 58 has a plurality of gripping tongs 59, which engage on the formwork sheet B 'on the support table 55, which is equipped with lattice girders G', and convey the fitted formwork sheet B 'into a pulsed welding machine 60 in accordance with the direction of the arrow P24.
• a plurality of pairs of welding electrodes 61 arranged in a welding line running transversely to the production direction P1
• the angled projections E 'of the infill wires Z, Z' are welded to the ribs R of the formwork sheet B '.
• a pair of welding electrodes 61 is present in the welding line for each contact point between the rib R and the bracing wire Z, Z '.
• a further welding line with welding electrodes 61, so that several contact points can be welded simultaneously or independently of one another in a double weld in the production direction P1.
• at least one welding line is arranged in the welding machine 60 both in and against the production direction P1.
• the insertion and extraction device 58 pulls the formwork sheet B 'through the welding machine 60 in time.
• the finished welded formwork sheet B ' is finally removed from devices not shown and fed to further use, for example stacked. As soon as the support table 55 is free, a new formwork sheet B is placed on it and the production cycle begins again.
• the essence of the invention is that, depending on the length of the lattice girder G, G 'to be produced, the pitch T, T' within the lattice girder G, G 'can be set so differently that the separation of the lattice girder G, G' of the continuously produced strand of material, depending on the application, either, as shown in FIG. 3, just behind the welding node K with the help of the upper chord and lower chord cutting device 41 'or, as shown in FIG. 1, in the bending chute S' on the lower chord using the infill separating device 36 and the upper chord and lower chord cutting device 41 takes place, the narrower division
• the Lattice girder G changes the pitch T, T 'of the bending device 8, and become the corresponding
• the lattice girder can have only one lower chord U, the bracing wires being welded to both sides of the lower chord U and therefore running parallel to one another.
• this lattice girder can have one or two upper chords and either one or two lower chords.
• the upper chord and the lower chord are alternately welded to the infill wire from the outside.
• these are welded in pairs opposite one another from the outside to the infill wire.
• the protrusions of the infill wire protruding over the lower flange or the lower flange are alternately bent to the right and left, viewed in the production direction P1. It is also possible within the scope of the invention to provide the formwork sheet B with a plurality of sheet metal collars instead of flat ribs R, the sheet metal collars running parallel to one another and, in the context of the invention, extending perpendicular to the formwork sheet B or at a selectable acute angle from the Level of the formwork sheet B can protrude.
• the protrusions E of the infill wires Z, Z 'protruding beyond the lower chords U, U' must be bent inwards with the aid of the bending device 40 such that the bent protrusions E 'run parallel to one another.
• the lattice girder is placed on the formwork sheet B in such a way that the protrusions E 'each lie laterally either from the outside or from the inside on the vertical sheet metal collar and can be connected to the latter.
• the connection is preferably made by welding the bent overhangs E 'to the sheet metal collar.
• the protrusions E of the bracing wires Z, Z 'protruding beyond the lower chords U, U' are bent outwards with the aid of the bending device 40 such that the bent protrusions E 'are in a position parallel to the acute angle sheet collars run.
• the lattice girder is placed on the formwork sheet B in such a way that the protrusions E 'are each pushed over the acute-angled sheet metal collar, lie against it laterally from the outside and connected to it, preferably welded.
• the separating device for separating the lattice girder G, G 'from the material strand in such a way that the top chord O together with the infill wires Z, Z' in or immediately behind its welding knot in a separating cut the infill wires Z, Z 'is cut off.
• separate cutting of the infill wires is also not necessary and the separating device 36 is inoperative.
• the exact position of the cutting position is to be selected analogously to the explanations for cutting through the welding knots K.
• narrow sheet metal strips or wires serving as clamps are welded onto the formwork sheet B at the corresponding points at which the protrusions E 'of the lattice girders G' are to be attached later.
• the clips are bent around the angled protrusions E' of the infill wires Z, Z 'and the lattice girder G' is thus clamped onto the formwork sheet B '.

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• Butt Welding And Welding Of Specific Article (AREA)

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• 2003
  • 2003-08-27 AT AT13492003A patent/AT413342B/de not_active IP Right Cessation
• 2004
  • 2004-05-07 ES ES04731534T patent/ES2261106T1/es active Pending
  • 2004-05-07 KR KR1020057007188A patent/KR100718624B1/ko not_active IP Right Cessation
  • 2004-05-07 EP EP04731534A patent/EP1660256A1/de not_active Withdrawn
  • 2004-05-07 WO PCT/AT2004/000158 patent/WO2005021181A1/de active Application Filing
  • 2004-05-07 CN CNB2004800008277A patent/CN100415405C/zh not_active Expired - Fee Related
  • 2004-05-07 JP JP2006524166A patent/JP2007503311A/ja active Pending

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