EP3691808B1 - Method for expanding and formatting profiled metal strip material to form a netting-like mat structure and apparatus for carrying out the method - Google Patents

Method for expanding and formatting profiled metal strip material to form a netting-like mat structure and apparatus for carrying out the method Download PDF

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Publication number
EP3691808B1
EP3691808B1 EP18778360.0A EP18778360A EP3691808B1 EP 3691808 B1 EP3691808 B1 EP 3691808B1 EP 18778360 A EP18778360 A EP 18778360A EP 3691808 B1 EP3691808 B1 EP 3691808B1
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EP
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Prior art keywords
roller
spikes
pair
strip
strip material
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EP18778360.0A
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German (de)
French (fr)
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EP3691808A1 (en
Inventor
Karl-Hermann Stahl
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Hacanoka GmbH
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Hacanoka GmbH
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Priority to PL18778360T priority Critical patent/PL3691808T3/en
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    • 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
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
    • B21D31/043—Making use of slitting discs or punch cutters

Definitions

  • the invention relates to a method for spreading out and sizing profiled metallic strip material into a net-like mat structure with a predetermined mesh size by a continuous drawing process, for which purpose the strip material is provided with notches that run in the longitudinal direction of the strip, are limited in length and form metal cores between them, the unnotched areas form network nodes after spreading and formatting and the metal wires are initially connected to one another via webs adjoining the base of the notch, the webs also having cracks formed by bending deformation due to fatigue fracture and the remaining web of a separating roller is perforated, so that the metal cores are reliably separated from each other in the notch area and the strip material can be pulled up to form a net-like structure.
  • the invention also relates to a device for carrying out the method.
  • Such a method is in its basic sequence in the EP 2 613 898 B1 already described, which basically makes it possible to shape a strip material processed according to the basic features of the preamble of present claim 1 into a mat structure. Further details on the pretreatment of the strip material emerge from the aforementioned EP 2 613 898 B1 .
  • the invention is therefore based on the object of obtaining a method of the type mentioned at the outset such that a uniform shape and thus a uniform network formation is achieved with a continuous drawing process over the entire width and length of the subsequent mat structure.
  • this object is achieved according to the invention in that the tape material is first drawn up at the beginning of the tape to the intended mesh size, for example in a manual manner with machine support, so that some rows of meshes are aligned orthogonally and at right angles to the mesh diagonal Tape edge are oriented that further the prepared tape beginning is fed to a first, rotatable roller pair of a winding unit, in that the tape beginning is placed on the preferably lower roller designed as a mandrel roller in such a way that the mandrels of the mandrel roller enter the mesh, and then the preferably upper one , provided with webs and recesses, designed as a pressure roller against the lower roller, so that both rollers form a nip between them, the arrangement of the mandrels is chosen so that - in both orthogonal directions - every second mesh through a mandrel is formed by dipping the mandrels of the mandrel roller into the recesses of the pressure roller.
  • the advantage achieved by the invention consists essentially in the fact that the pulling forces in every second mesh in the area of the largest mesh width, taking into account the spring-back, are essentially only applied in the nip and the upstream meshing area in front of it can develop freely. In this way, a uniform network formation is achieved, with the pull-up forces acting relatively uniformly over the entire width of the mesh structure.
  • the edge-side seen in the longitudinal direction of the belt, is pulled open by an axially displaceable mandrel, which is moved via a control link on the edge of the mandrel roller.
  • first and the second roller pair are aligned with one another in such a way that the thorns of the second roller each enter all meshes.
  • the mandrels of the first and second roller pair have a pyramidal or truncated pyramid shape, which are symmetrical or asymmetrical depending on their position.
  • a further, very advantageous embodiment of the invention provides that the second pair of rollers is followed by a third pair of rollers, the lower roller being provided with guide receptacles for the metal cores, whereby the network nodes connecting the metal cores are precisely positioned on this roller and in the guide receptacle from the upper roller provided, axially spaced discs are pressed, further between the discs are arranged punches, which are centered on the network nodes and press them into the cutting knives of the lower roller, whereby those ending at the network nodes, from the milling and separating the metal wires remaining, tapering separation cracks are cut out.
  • the cutting device is designed so that the area adjacent to the network node formed by the metal cores that meet there, i.e. the tapering separation crack between the cores, is provided with a small radius and the tool is designed in this way is that after the cutting process, the surface is smoothed with a build-up of compressive stress.
  • a device solving the problem according to the invention is characterized by a winding unit with a first, rotatably drivable pair of rollers, in which the preferably lower roller is designed as a mandrel roller and the preferably upper roller is provided with webs and recesses as a pressure roller which can be advanced against the lower one, so that both rollers have one between them Form roll gap for profiled metallic strip material from a net-like mat structure, the arrangement of the mandrels is chosen so that - in both orthogonal directions - every second mesh of the mat structure is formed by a mandrel, in that the mandrels of the mandrel roller dip into the recesses of the pressure roller.
  • the pulling-up process is significantly facilitated and improved if the mandrel roller has an axially displaceable mandrel at the edge, which is moved via a control link on the edge of the mandrel roller and, viewed in the longitudinal direction of the band, pulls every second loop.
  • the winding unit has a further pair of rollers for reshaping the strip material, this pair of rollers essentially corresponding in its surface structure to the first pair of rollers, but with twice the number of mandrels and a correspondingly modified design of the top roller in order to be able to use the formed mat structure of the Band material to compensate for existing springback forces and to achieve good dimensional accuracy.
  • first and the second roller pair are aligned with one another in such a way that the thorns of the second roller each enter all meshes of the mat structure.
  • the mandrels of the first and second roller pair can have a pyramidal or truncated pyramid shape, which are symmetrical or asymmetrical depending on their position.
  • the second pair of rollers it has proven to be expedient for the second pair of rollers to be followed by a third pair of rollers, the lower roller being provided with guide receptacles for positioning the network nodes connecting the metal wires, while spaced disks are provided on the upper roller , through which the network nodes are pressed in the axial direction into the guide receptacles, with punches being arranged between the discs, which are centered on the network nodes and press them into the cutting knives of the first roller, whereby the ones ending at the network nodes from milling and separating the Metal veins remaining, tapering separation cracks are cut out.
  • the cutting device is round so that the area adjacent to the network node, formed by the metal cores that meet there, is provided with a small radius, the tool being designed so that the surface is smoothed after the cutting process is achieved with simultaneous build-up of compressive stress.
  • the device shown in the drawing allows a method to be carried out for spreading and sizing profiled metallic strip material 1 to form a net-like mat structure 2 with a mesh size to be specified by means of a continuous drawing process.
  • the strip material 1 is provided with notches 3 which run in the longitudinal direction of the strip, are limited in length and form metal wires 11 between them, as shown in FIG Fig. 2 indicated and recognizable on the left.
  • the unnotched Areas then form network nodes 4 after spreading and formatting, as is also shown in FIG Fig. 2 can be seen in the right area.
  • the metal wires 11 are initially connected to one another via webs adjoining the base of the notch. However, these webs have cracks formed by bending deformation due to fatigue fracture, so that the remaining web is finally broken through by a separating roller. As a result, the metal cores 11 are reliably separated from one another in the notch area, so that the strip material 1 can be drawn up to form a net-like structure.
  • the band material 1 is first pulled at the beginning of the band to the intended mesh size in preparation for pulling on, so that some rows of stitches are orthogonally aligned and oriented at right angles to the band edge with respect to their mesh diagonal. This is done in a manual way with machine support.
  • the prepared beginning of the tape is then fed to a first, rotatable pair of rollers 5 of a winding unit by placing the beginning of the tape onto the preferably lower roller, designed as a mandrel roller 5.1, so that the mandrels 6 of the mandrel roller 5.1 enter the mesh.
  • the preferably upper one, provided with webs and recesses is designed as a pressure roller 5.2 Roll against the lower one so that both rolls form a nip between them.
  • the arrangement of the mandrels 6 is chosen so that - in both orthogonal directions - every second stitch is formed by a mandrel 6 in that the mandrels 6 of the mandrel roller 5.1 dip into the recesses 7 of the pressure roller 5.2.
  • the stretching mesh area 8 located in front of it can be designed freely in terms of its spatial shape, as is particularly the case in FIG Fig. 1 , 4th and 6th can be seen in the form of an upward bulge. In this way, a uniform network formation is achieved, with the pull-up forces acting relatively uniformly over the entire width of the mesh structure.
  • the edge-side seen in the longitudinal direction of the tape, is the second mesh - as in particular in FIG Fig. 2 , 3 and 5 , but also in Fig. 6 can be seen - pulled up by an axially displaceable mandrel 9, which is moved via a control link 10 on the edge of the mandrel roller 5.1.
  • a largely linear edge of the mesh structure is achieved.
  • the drawn-up, initially roughly shaped mat structure 2 is fed to a further pair of rollers for reshaping.
  • This pair of rollers corresponds in his
  • the surface structure is essentially that of the first pair of rollers, but can be provided with twice the number of mandrels and a correspondingly modified design of the top roller in order to compensate for the spring-back forces of the mat structure and to achieve good dimensional accuracy.
  • this ensures that bulges in particular, which can be a nuisance during later winding, are smoothed out by a slight rolling deformation.
  • the mandrels 9 for forming the meshes in the first and second roller pair have a pyramidal or truncated pyramid shape, which are symmetrical or asymmetrical depending on their position.
  • the invention further provides that the second pair of rollers is followed by a third pair of rollers.
  • One roller 14.1 is this roller pair, as in the Figures 8 to 10 shown, provided with guide receptacles for the metal wires, whereby the network nodes 4 connecting the metal wires 11 are precisely positioned on this roller.
  • they are pressed into the guide receptacle by disks 12 provided on the second roller 14.2 and arranged at a mutual spacing in the axial direction.
  • punches 13 are arranged between the disks 12, which are aligned centrally with respect to the network nodes 4 and press them into the cutting knife 15 of the first roller 14.1. Through this the tapering separation cracks that end at the network node 4 and remain from the milling and cutting of the metal wires 11 are cut out.
  • the cutting device is designed in such a way that the area adjoining the network node 4 and formed by the metal cores that meet there, that is, the tapering separation crack between the cores, is provided with a small radius.
  • the tool is also designed in such a way that, after the cutting process, the surface is smoothed with a build-up of compressive stress.

Description

Die Erfindung betrifft ein Verfahren zum Ausbreiten und Formatieren von profiliertem metallischem Bandmaterial zu einer netzartigen Mattenstruktur mit vorzugebender Maschenweite durch einen kontinuierlichen Aufziehprozess, wozu das Bandmaterial mit in Bandlängsrichtung verlaufenden, in der Länge begrenzten und zwischen sich Metalladern bildenden Kerben versehen ist, wobei die ungekerbten Bereiche nach dem Ausbreiten und Formatieren Netzknoten bilden und die Metalladern über im Kerbgrund angrenzende Stege zunächst miteinander verbunden sind, wobei weiter die Stege durch Biegeverformung gebildete Anrisse durch Dauerbruch aufweisen und der Reststeg von einer Trennwalze durchbrochen wird, so dass die Metalladern im Kerbbereich zuverlässig voneinander getrennt sind und das Bandmaterial zur netzartigen Struktur aufziehbar ist. Weiter betrifft die Erfindung eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for spreading out and sizing profiled metallic strip material into a net-like mat structure with a predetermined mesh size by a continuous drawing process, for which purpose the strip material is provided with notches that run in the longitudinal direction of the strip, are limited in length and form metal cores between them, the unnotched areas form network nodes after spreading and formatting and the metal wires are initially connected to one another via webs adjoining the base of the notch, the webs also having cracks formed by bending deformation due to fatigue fracture and the remaining web of a separating roller is perforated, so that the metal cores are reliably separated from each other in the notch area and the strip material can be pulled up to form a net-like structure. The invention also relates to a device for carrying out the method.

Ein derartiges Verfahren ist in seinem grundsätzlichen Ablauf in der EP 2 613 898 B1 bereits beschrieben, das es grundsätzlich ermöglicht, ein nach den Grundzügen des Oberbegriffs des vorliegenden Anspruchs 1 bearbeitetes Bandmaterial zu einer Mattenstruktur umzuformen. Weitere Einzelheiten zur Vorbehandlung des Bandmaterials ergeben sich aus der erwähnten EP 2 613 898 B1 .Such a method is in its basic sequence in the EP 2 613 898 B1 already described, which basically makes it possible to shape a strip material processed according to the basic features of the preamble of present claim 1 into a mat structure. Further details on the pretreatment of the strip material emerge from the aforementioned EP 2 613 898 B1 .

Es hat sich in der Praxis gezeigt, dass ein Aufziehen des Bandmaterials in der im Stand der Technik beschriebenen Weise mit großem Aufwand möglich ist, um eine definiert gute Netzstruktur zu erreichen. Daher sind zur weiteren Verbesserung der Formgenauigkeit der angestrebten Mattenstruktur im Rahmen eines kontinuierlichen Fertigungsprozesses weitergehende Maßnahmen erforderlich, die insbesondere auch dafür sorgen, eine gleichmäßigere und rationellere Ausformung dieser Mattenstruktur zu erreichen.It has been shown in practice that the tape material can be pulled up in the manner described in the prior art with great effort in order to achieve a well-defined network structure. Therefore, in order to further improve the dimensional accuracy of the desired mat structure in the context of a continuous manufacturing process, further measures are required which, in particular, also ensure that this mat structure is shaped more uniformly and more efficiently.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art dahingehend zu erhalten, dass mit einem kontinuierlichen Aufziehprozess über die gesamte Breite und Länge der späteren Mattenstruktur eine einheitliche Ausformung und damit eine gleichmäßige Netzausbildung erreicht wird.The invention is therefore based on the object of obtaining a method of the type mentioned at the outset such that a uniform shape and thus a uniform network formation is achieved with a continuous drawing process over the entire width and length of the subsequent mat structure.

Diese Aufgabe wird in verfahrensmäßiger Hinsicht nach der Erfindung dadurch gelöst, dass das Bandmaterial zur Vorbereitung des Aufziehens zunächst am Bandanfang auf die vorgesehene Maschenweite zum Beispiel in handwerklicher Art mit maschineller Unterstützung aufgezogen wird, dass einige Maschenreihen in sich orthogonal ausgerichtet und bezüglich ihrer Maschendiagonale rechtwinklig zum Bandrand orientiert sind, dass weiter der vorbereitete Bandanfang einem ersten, drehantreibbaren Walzenpaar einer Aufzieheinheit zugeführt wird, indem der Bandanfang auf die bevorzugt untere, als Dornwalze ausgebildete Walze so aufgelegt wird, dass die Dorne der Dornwalze in die Maschen eintreten, und sodann die bevorzugt obere, mit Stegen und Aussparungen versehene, als Druckwalze ausgebildete Walze gegen die untere zugestellt wird, so dass beide Walzen zwischen sich einen Walzspalt bilden, wobei die Anordnung der Dorne so gewählt ist, dass - in beiden orthogonalen Richtungen - jede zweite Masche durch einen Dorn ausgeformt wird, indem die Dorne der Dornwalze in die Aussparungen der Druckwalze eintauchen.In terms of the method, this object is achieved according to the invention in that the tape material is first drawn up at the beginning of the tape to the intended mesh size, for example in a manual manner with machine support, so that some rows of meshes are aligned orthogonally and at right angles to the mesh diagonal Tape edge are oriented that further the prepared tape beginning is fed to a first, rotatable roller pair of a winding unit, in that the tape beginning is placed on the preferably lower roller designed as a mandrel roller in such a way that the mandrels of the mandrel roller enter the mesh, and then the preferably upper one , provided with webs and recesses, designed as a pressure roller against the lower roller, so that both rollers form a nip between them, the arrangement of the mandrels is chosen so that - in both orthogonal directions - every second mesh through a mandrel is formed by dipping the mandrels of the mandrel roller into the recesses of the pressure roller.

Der durch die Erfindung erreichte Vorteil besteht im wesentlichen darin, dass die Aufziehkräfte in jeder zweiten Masche im Bereich der größten Netzbreite unter Berücksichtigung der Rückfederung im wesentlichen erst im Walzenspalt aufgebracht werden und dabei der sich davor befindende, sich aufziehende Netzbereich frei ausbilden kann. So wird eine gleichmäßige Netzausbildung erreicht, wobei die Aufziehkräfte relativ gleichmäßig über die gesamte Breite der Maschenstruktur angreifen.The advantage achieved by the invention consists essentially in the fact that the pulling forces in every second mesh in the area of the largest mesh width, taking into account the spring-back, are essentially only applied in the nip and the upstream meshing area in front of it can develop freely. In this way, a uniform network formation is achieved, with the pull-up forces acting relatively uniformly over the entire width of the mesh structure.

In bevorzugter Ausführungsform der Erfindung ist dabei vorgesehen, dass die randseitige, in Bandlängsrichtung gesehen jeweils zweite Masche von einem axial verschiebbaren Dorn aufgezogen wird, der über eine Steuerkulisse am Rand der Dornwalze bewegt wird. Dadurch wird ein weitgehend linear verlaufender Rand der Maschenstruktur erreicht.In a preferred embodiment of the invention it is provided that the edge-side, seen in the longitudinal direction of the belt, is pulled open by an axially displaceable mandrel, which is moved via a control link on the edge of the mandrel roller. As a result, a largely linear edge of the mesh structure is achieved.

Als vorteilhaft im Rahmen der Erfindung hat es sich erwiesen, wenn die aufgezogene, zunächst grob ausgeformte Mattenstruktur einem weiteren Walzenpaar zur Nachformung zugeführt wird, wobei dieses Walzenpaar in seiner Oberflächenstruktur im wesentlichen dem ersten Walzenpaar, jedoch mit doppelter Dornanzahl und entsprechend geänderter Gestaltung der Oberwalze entspricht, um Rückfederungskräfte der Mattenstruktur auszugleichen und eine gute Formgenauigkeit zu erreichen. Zusätzlich wird dadurch gewährleistet, dass insbesondere Aufwölbungen, die beim späteren Aufwickeln störend sein können, durch eine leichte Walzumformung geglättet werden.It has proven to be advantageous within the scope of the invention if the drawn up, initially roughly shaped mat structure is fed to a further pair of rollers for reshaping, this pair of rollers essentially corresponding in its surface structure to the first pair of rollers, but with twice the number of mandrels and a correspondingly modified design of the top roller to compensate for springback forces of the mat structure and to achieve good dimensional accuracy. In addition, this ensures that bulges in particular, which can be a nuisance during later winding, are smoothed out by a slight rolling deformation.

Dabei ist es günstig, wenn das erste und das zweite Walzenpaar derart zueinander ausgerichtet sind, dass die Dornen der zweiten Walze jeweils in alle Maschen eintreten.It is advantageous if the first and the second roller pair are aligned with one another in such a way that the thorns of the second roller each enter all meshes.

Für die Ausformung der Maschen hat es sich als vorteilhaft erwiesen, wenn die Dornen des ersten und zweiten Walzenpaars eine pyramidenförmige oder pyramidenstumpfförmige Gestalt besitzen, die je nach Position symmetrisch oder unsymmetrisch ausgebildet sind.For the formation of the meshes, it has proven to be advantageous if the mandrels of the first and second roller pair have a pyramidal or truncated pyramid shape, which are symmetrical or asymmetrical depending on their position.

Eine weitere, sehr vorteilhafte Ausgestaltung der Erfindung sieht vor, dass dem zweiten Walzenpaar ein drittes Walzenpaar nachgeordnet ist, wobei die untere Walze mit Führungsaufnahmen für die Metalladern versehen ist, wodurch die die Metalladern verbindenen Netzknoten auf dieser Walze genau positioniert und in der Führungsaufnahme von auf der oberen Walze vorgesehenen, in axialer Richtung mit gegenseitigem Abstand angeordneten Scheiben gedrückt werden, wobei weiter zwischen den Scheiben Stempel angeordnet sind, die mittig zu den Netzknoten ausgerichtet sind und diese in Schneidmesser der unteren Walze drücken, wodurch die an den Netzknoten endenden, vom Walken und Trennen der Metalladern verbliebenen, auslaufenden Trennungsrisse herausgeschnitten werden.A further, very advantageous embodiment of the invention provides that the second pair of rollers is followed by a third pair of rollers, the lower roller being provided with guide receptacles for the metal cores, whereby the network nodes connecting the metal cores are precisely positioned on this roller and in the guide receptacle from the upper roller provided, axially spaced discs are pressed, further between the discs are arranged punches, which are centered on the network nodes and press them into the cutting knives of the lower roller, whereby those ending at the network nodes, from the milling and separating the metal wires remaining, tapering separation cracks are cut out.

Besonders günstig und daher im Rahmen der Erfindung bevorzugt ist dabei die Schneideinrichtung so gestaltet, dass der an den Netzknoten angrenzende, von den dort zusammentreffenden Metalladern gebildete Bereich, also der auslaufende Trennriss zwischen den Adern, mit einem kleinen Radius versehen ist und das Werkzeug so ausgebildet ist, dass nach dem Schneidprozess noch eine Glättung der Oberfläche mit einem Druckspannungsaufbau erzielt wird.Particularly favorable and therefore preferred within the scope of the invention, the cutting device is designed so that the area adjacent to the network node formed by the metal cores that meet there, i.e. the tapering separation crack between the cores, is provided with a small radius and the tool is designed in this way is that after the cutting process, the surface is smoothed with a build-up of compressive stress.

Eine die erfindungsgemäße Aufgabe lösende Vorrichtung ist gekennzeichnet durch eine Aufzieheinheit mit einem ersten, drehantreibbaren Walzenpaar, bei der die bevorzugt untere Walze als Dornwalze ausgebildet ist und die bevorzugt obere Walze mit Stegen und Aussparungen versehen als Druckwalze ausgebildet ist, die gegen die untere zustellbar ist, so dass beide Walzen zwischen sich einen Walzspalt für profiliertes metallisches Bandmaterial von einer netzartigen Mattenstruktur bilden, wobei die Anordnung der Dorne so gewählt ist, dass - in beiden orthogonalen Richtungen - jede zweite Masche der Mattenstruktur durch einen Dorn ausgeformt wird, indem die Dorne der Dornwalze in die Aussparungen der Druckwalze eintauchen.A device solving the problem according to the invention is characterized by a winding unit with a first, rotatably drivable pair of rollers, in which the preferably lower roller is designed as a mandrel roller and the preferably upper roller is provided with webs and recesses as a pressure roller which can be advanced against the lower one, so that both rollers have one between them Form roll gap for profiled metallic strip material from a net-like mat structure, the arrangement of the mandrels is chosen so that - in both orthogonal directions - every second mesh of the mat structure is formed by a mandrel, in that the mandrels of the mandrel roller dip into the recesses of the pressure roller.

Der Aufziehvorgang wird dabei wesentlich erleichtert und verbessert, wenn die Dornwalze randseitig einen axial verschiebbaren Dorn aufweist, der über eine Steuerkulisse am Rand der Dornwalze bewegt wird und in Bandlängsrichtung gesehen jeweils jede zweite Masche aufzieht.The pulling-up process is significantly facilitated and improved if the mandrel roller has an axially displaceable mandrel at the edge, which is moved via a control link on the edge of the mandrel roller and, viewed in the longitudinal direction of the band, pulls every second loop.

Ferner hat es sich als vorteilhaft erwiesen, wenn die Aufzieheinheit ein weiteres Walzenpaar zur Nachformung des Bandmaterials aufweist, wobei dieses Walzenpaar in seiner Oberflächenstruktur im wesentlichen dem ersten Walzenpaar, jedoch mit doppelter Dornanzahl und entsprechend geänderter Gestaltung der Oberwalze entspricht, um in der ausgeformten Mattenstruktur des Bandmaterials vorhandene Rückfederungskräfte auszugleichen und eine gute Formgenauigkeit zu erreichen.It has also proven to be advantageous if the winding unit has a further pair of rollers for reshaping the strip material, this pair of rollers essentially corresponding in its surface structure to the first pair of rollers, but with twice the number of mandrels and a correspondingly modified design of the top roller in order to be able to use the formed mat structure of the Band material to compensate for existing springback forces and to achieve good dimensional accuracy.

Hierbei empfiehlt es sich im Rahmen der Erfindung, dass das erste und das zweite Walzenpaar derart zueinander ausgerichtet sind, dass die Dornen der zweiten Walze jeweils in alle Maschen der Mattenstruktur eintreten.It is recommended within the scope of the invention that the first and the second roller pair are aligned with one another in such a way that the thorns of the second roller each enter all meshes of the mat structure.

Im einzelnen können in bevorzugter Gestaltung die Dornen des ersten und zweiten Walzenpaars eine pyramidenförmige oder pyramidenstumpfförmige Gestalt besitzen, die je nach Position symmetrisch oder unsymmetrisch ausgebildet sind. Schließlich hat es sich im Rahmen der Erfindung als zweckmäßig erwiesen, dass dem zweiten Walzenpaar ein drittes Walzenpaar nachgeordnet ist, wobei die untere Walze mit Führungsaufnahmen zur Positionierung der die Metalladern verbindenden Netzknoten versehen ist, während auf der oberen Walze mit gegenseitigem Abstand angeordnete Scheiben vorgesehen sind, durch die die Netzknoten in axialer Richtung in die Führungsaufnahmen gedrückt werden, wobei zwischen den Scheiben Stempel angeordnet sind, die mittig zu den Netzknoten ausgerichtet sind und diese in Schneidmesser der ersten Walze drücken, wodurch die an den Netzknoten endenden, vom Walken und Trennen der Metalladern verbliebenen, auslaufenden Trennungsrisse herausgeschnitten werden.In particular, in a preferred configuration, the mandrels of the first and second roller pair can have a pyramidal or truncated pyramid shape, which are symmetrical or asymmetrical depending on their position. Finally, within the scope of the invention, it has proven to be expedient for the second pair of rollers to be followed by a third pair of rollers, the lower roller being provided with guide receptacles for positioning the network nodes connecting the metal wires, while spaced disks are provided on the upper roller , through which the network nodes are pressed in the axial direction into the guide receptacles, with punches being arranged between the discs, which are centered on the network nodes and press them into the cutting knives of the first roller, whereby the ones ending at the network nodes from milling and separating the Metal veins remaining, tapering separation cracks are cut out.

Dabei hat es sich bewährt, wenn die Schneideinrichtung rund gestaltet ist, so dass der an den Netzknoten angrenzende, von den dort zusammentreffenden Metalladern gebildete Bereich mit einem kleinen Radius versehen wird, wobei das Werkzeug so ausgebildet ist, dass nach dem Schneidprozess eine Glättung der Oberfläche mit gleichzeitigem Druckspannungsaufbau erzielt wird.It has proven useful if the cutting device is round so that the area adjacent to the network node, formed by the metal cores that meet there, is provided with a small radius, the tool being designed so that the surface is smoothed after the cutting process is achieved with simultaneous build-up of compressive stress.

Im Folgenden wird die Erfindung an einem in der Zeichnung dargestellten Ausführungsbeispiel näher erläutert; es zeigen:

Fig. 1
eine teilweise Darstellung der Vorrichtung in Seitenansicht,
Fig. 2
den Gegenstand nach Fig. 1 in Draufsicht,
Fig. 3
den Gegenstand nach Fig. 1 im Schnitt längs der Linie A - A,
Fig. 4
den Gegenstand nach Fig. 1 im Schnitt längs der Linie B - B gemäß Fig. 2,
Fig. 5
die Detaildarstellung Z gemäß Fig. 3,
Fig. 6
eine perspektivische Darstellung des Gegenstands nach Fig. 1,
Fig. 7
eine der Fig. 6 entsprechende perspektivische Darstellung des Gegenstands nach Fig. 1, jedoch ohne Bandmaterial und axial verschiebbare Dorne,
Fig. 8
eine Detaildarstellung der Unterwalze in Draufsicht,
Fig. 9
eine Schnittdarstellung längs der Linie A - A gemäß Fig. 8,
Fig. 10
eine Schnittdarstellung längs der Linie B - B gemäß Fig. 8.
The invention is explained in more detail below using an exemplary embodiment shown in the drawing; show it:
Fig. 1
a partial representation of the device in side view,
Fig. 2
the subject Fig. 1 in plan view,
Fig. 3
the subject Fig. 1 in section along the line A - A,
Fig. 4
the subject Fig. 1 in section along the line B - B according to Fig. 2 ,
Fig. 5
the detail representation Z according to Fig. 3 ,
Fig. 6
a perspective view of the object according to Fig. 1 ,
Fig. 7
one of the Fig. 6 corresponding perspective representation of the object according to Fig. 1 , but without tape material and axially displaceable mandrels,
Fig. 8
a detailed representation of the lower roller in plan view,
Fig. 9
a sectional view along the line A - A according to FIG Fig. 8 ,
Fig. 10
a sectional view along the line B - B according to FIG Fig. 8 .

Die in der Zeichnung dargestellte Vorrichtung erlaubt die Durchführung eines Verfahrens zum Ausbreiten und Formatieren von profiliertem metallischem Bandmaterial 1 zu einer netzartigen Mattenstruktur 2 mit vorzugebender Maschenweite durch einen kontinuierlichen Aufziehprozess. Dazu ist das Bandmaterial 1 mit in Bandlängsrichtung verlaufenden, in der Länge begrenzten und zwischen sich Metalladern 11 bildenden Kerben 3 versehen, wie dies in Fig. 2 links angedeutet und erkennbar ist. Die ungekerbten Bereiche bilden dann nach dem Ausbreiten und Formatieren Netzknoten 4, wie dies ebenfalls in Fig. 2 im rechten Bereich erkennbar ist.The device shown in the drawing allows a method to be carried out for spreading and sizing profiled metallic strip material 1 to form a net-like mat structure 2 with a mesh size to be specified by means of a continuous drawing process. For this purpose, the strip material 1 is provided with notches 3 which run in the longitudinal direction of the strip, are limited in length and form metal wires 11 between them, as shown in FIG Fig. 2 indicated and recognizable on the left. The unnotched Areas then form network nodes 4 after spreading and formatting, as is also shown in FIG Fig. 2 can be seen in the right area.

Die Metalladern 11 sind über im Kerbgrund angrenzende Stege zunächst miteinander verbunden. Diese Stege weisen jedoch durch Biegeverformung gebildete Anrisse durch Dauerbruch auf, so dass der Reststeg schließlich von einer Trennwalze durchbrochen wird. Dadurch sind die Metalladern 11 im Kerbbereich zuverlässig voneinander getrennt, so dass das Bandmaterial 1 zu einer netzartigen Struktur aufziehbar ist.The metal wires 11 are initially connected to one another via webs adjoining the base of the notch. However, these webs have cracks formed by bending deformation due to fatigue fracture, so that the remaining web is finally broken through by a separating roller. As a result, the metal cores 11 are reliably separated from one another in the notch area, so that the strip material 1 can be drawn up to form a net-like structure.

Wichtig bei dem erfindungsgemäßen Verfahren ist, eine definiert gute Netzstruktur im Rahmen eines kontinuierlichen Fertigungsprozesses zu erreichen, bei welchem über die gesamte Breite und Länge der späteren Mattenstruktur 2 eine einheitliche Ausformung und damit eine gleichmäßige Netzausbildung erfolgt. Dazu wird das Bandmaterial 1 zur Vorbereitung des Aufziehens zunächst am Bandanfang auf die vorgesehene Maschenweite aufgezogen, sodass einige Maschenreihen in sich orthogonal ausgerichtet und bezüglich ihrer Maschendiagonale rechtwinklig zum Bandrand orientiert sind. Dies geschieht auf handwerkliche Art mit maschineller Unterstützung.It is important in the method according to the invention to achieve a defined, good network structure as part of a continuous manufacturing process in which a uniform shape and thus a uniform network formation takes place over the entire width and length of the subsequent mat structure 2. For this purpose, the band material 1 is first pulled at the beginning of the band to the intended mesh size in preparation for pulling on, so that some rows of stitches are orthogonally aligned and oriented at right angles to the band edge with respect to their mesh diagonal. This is done in a manual way with machine support.

Sodann wird der vorbereitete Bandanfang einem ersten, drehantreibbaren Walzenpaar 5 einer Aufzieheinheit zugeführt, indem der Bandanfang auf die bevorzugt untere, als Dornwalze 5.1 ausgebildete Walze so aufgelegt wird, dass die Dorne 6 der Dornwalze 5.1 in die Maschen eintreten. Dann wird die bevorzugt obere, mit Stegen und Aussparungen versehene, als Druckwalze 5.2 ausgebildete Walze gegen die untere zugestellt, so dass beide Walzen zwischen sich einen Walzspalt bilden. Die Anordnung der Dorne 6 ist dabei so gewählt, dass - in beiden orthogonalen Richtungen - jede zweite Masche durch einen Dorn 6 ausgeformt wird, indem die Dorne 6 der Dornwalze 5.1 in die Aussparungen 7 der Druckwalze 5.2 eintauchen.The prepared beginning of the tape is then fed to a first, rotatable pair of rollers 5 of a winding unit by placing the beginning of the tape onto the preferably lower roller, designed as a mandrel roller 5.1, so that the mandrels 6 of the mandrel roller 5.1 enter the mesh. Then the preferably upper one, provided with webs and recesses, is designed as a pressure roller 5.2 Roll against the lower one so that both rolls form a nip between them. The arrangement of the mandrels 6 is chosen so that - in both orthogonal directions - every second stitch is formed by a mandrel 6 in that the mandrels 6 of the mandrel roller 5.1 dip into the recesses 7 of the pressure roller 5.2.

Dadurch wird erreicht, dass die Aufziehkräfte in jeder zweiten Masche im Bereich der größten Netzbreite unter Berücksichtigung der Rückfederung im wesentlichen erst im Walzenspalt aufgebracht werden. Dabei kann der sich davor befindende, sich aufziehende Netzbereich 8 hinsichtlich seiner räumlichen Form frei ausbilden, wie dies insbesondere in den Fig. 1, 4 und 6 in Form einer nach oben gerichteten Auswölbung zu sehen ist. So wird eine gleichmäßige Netzausbildung erreicht, wobei die Aufziehkräfte relativ gleichmäßig über die gesamte Breite der Maschenstruktur angreifen.This ensures that the pulling forces in every second mesh in the area of the largest network width are essentially only applied in the nip, taking into account the springback. In this case, the stretching mesh area 8 located in front of it can be designed freely in terms of its spatial shape, as is particularly the case in FIG Fig. 1 , 4th and 6th can be seen in the form of an upward bulge. In this way, a uniform network formation is achieved, with the pull-up forces acting relatively uniformly over the entire width of the mesh structure.

Die randseitige, in Bandlängsrichtung gesehen jeweils zweite Masche wird - wie insbesondere in den Fig. 2, 3 und 5, aber auch in Fig. 6 zu sehen ist - von einem axial verschiebbaren Dorn 9 aufgezogen, der über eine Steuerkulisse 10 am Rand der Dornwalze 5.1 bewegt wird. Dadurch wird ein weitgehend linear verlaufender Rand der Maschenstruktur erreicht.The edge-side, seen in the longitudinal direction of the tape, is the second mesh - as in particular in FIG Fig. 2 , 3 and 5 , but also in Fig. 6 can be seen - pulled up by an axially displaceable mandrel 9, which is moved via a control link 10 on the edge of the mandrel roller 5.1. As a result, a largely linear edge of the mesh structure is achieved.

Wie als vorteilhafte Ausgestaltung der Erfindung angedacht, in der Zeichnung jedoch nicht näher dargestellt ist, wird die aufgezogene, zunächst grob ausgeformte Mattenstruktur 2 einem weiteren Walzenpaar zur Nachformung zugeführt. Dieses Walzenpaar entspricht in seiner Oberflächenstruktur im wesentlichen dem ersten Walzenpaar, kann jedoch mit doppelter Dornanzahl und entsprechend geänderter Gestaltung der Oberwalze versehen sein, um Rückfederungskräfte der Mattenstruktur auszugleichen und eine gute Formgenauigkeit zu erreichen. Zusätzlich wird dadurch gewährleistet, dass insbesondere Aufwölbungen, die beim späteren Aufwickeln störend sein können, durch eine leichte Walzumformung geglättet werden.As envisaged as an advantageous embodiment of the invention, but not shown in more detail in the drawing, the drawn-up, initially roughly shaped mat structure 2 is fed to a further pair of rollers for reshaping. This pair of rollers corresponds in his The surface structure is essentially that of the first pair of rollers, but can be provided with twice the number of mandrels and a correspondingly modified design of the top roller in order to compensate for the spring-back forces of the mat structure and to achieve good dimensional accuracy. In addition, this ensures that bulges in particular, which can be a nuisance during later winding, are smoothed out by a slight rolling deformation.

Dabei ist es günstig, wenn - in in der Zeichnung nicht näher dargestellter Weise - das erste und das zweite Walzenpaar derart zueinander ausgerichtet sind, dass die Dornen 9 der zweiten Walze jeweils in alle Maschen eintreten.It is advantageous if - in a manner not shown in detail in the drawing - the first and the second roller pair are aligned with one another in such a way that the mandrels 9 of the second roller each enter into all meshes.

Die Dornen 9 für die Ausformung der Maschen besitzen beim ersten und zweiten Walzenpaar eine pyramidenförmige oder pyramidenstumpfförmige Gestalt, die je nach Position symmetrisch oder unsymmetrisch ausgebildet sind.The mandrels 9 for forming the meshes in the first and second roller pair have a pyramidal or truncated pyramid shape, which are symmetrical or asymmetrical depending on their position.

Weiter sieht die Erfindung vor, dass dem zweiten Walzenpaar ein drittes Walzenpaar nachgeordnet ist. Dabei ist die eine Walze 14.1 dieses Walzenpaars, wie in den Fig. 8 bis 10 gezeigt, mit Führungsaufnahmen für die Metalladern versehen, wodurch die die Metalladern 11 verbindenden Netzknoten 4 auf dieser Walze genau positioniert werden. Zusätzlich werden sie in die Führungsaufnahme von auf der zweiten Walze 14.2 vorgesehenen, in axialer Richtung mit gegenseitigem Abstand angeordneten Scheiben 12 gedrückt. Weiter sind zwischen den Scheiben 12 Stempel 13 angeordnet, die mittig zu den Netzknoten 4 ausgerichtet sind und diese in Schneidmesser 15 der ersten Walze 14.1 drücken. Dadurch werden die an den Netzknoten 4 endenden, vom Walken und Trennen der Metalladern 11 verbliebenen, auslaufenden Trennungsrisse herausgeschnitten.The invention further provides that the second pair of rollers is followed by a third pair of rollers. One roller 14.1 is this roller pair, as in the Figures 8 to 10 shown, provided with guide receptacles for the metal wires, whereby the network nodes 4 connecting the metal wires 11 are precisely positioned on this roller. In addition, they are pressed into the guide receptacle by disks 12 provided on the second roller 14.2 and arranged at a mutual spacing in the axial direction. Furthermore, punches 13 are arranged between the disks 12, which are aligned centrally with respect to the network nodes 4 and press them into the cutting knife 15 of the first roller 14.1. Through this the tapering separation cracks that end at the network node 4 and remain from the milling and cutting of the metal wires 11 are cut out.

Die Schneideinrichtung ist hierbei so gestaltet, dass der an den Netzknoten 4 angrenzende, von den dort zusammentreffenden Metalladern gebildete Bereich, also der auslaufende Trennriss zwischen den Adern, mit einem kleinen Radius versehen ist. Dazu ist das Werkzeug weiter so ausgebildet, dass nach dem Schneidprozess noch eine Glättung der Oberfläche mit einem Druckspannungsaufbau erzielt wird.The cutting device is designed in such a way that the area adjoining the network node 4 and formed by the metal cores that meet there, that is, the tapering separation crack between the cores, is provided with a small radius. For this purpose, the tool is also designed in such a way that, after the cutting process, the surface is smoothed with a build-up of compressive stress.

Claims (14)

  1. A method of expanding and formatting profiled metal strip material (1) to form a net-like mat structure (2) with a mesh width which is to be predetermined by a continuous drawing process, for which purpose the strip material (1) is provided with notches (3) which extend in the longitudinal direction of the strip and which are of limited length and which
    between them form metal strands (11), wherein after the expanding and formatting operation the unnotched regions form net nodes (4) and the metal strands (11) are initially connected together by way of adjoining bars in the notch bottom, wherein moreover the bars have cracks formed by flexural deformation by virtue of fatigue fracture and the remaining bar is
    broken through by a severing roller so that the metal strands (11) are reliably separated from each other in the notch region and the strip material (1) can be drawn open to form the net-like structure, characterised in that for preparation of the continuous drawing operation the strip material (1) is firstly drawn open at the strip beginning to the
    intended mesh width in such a way that some rows of meshes are in themselves oriented orthogonally and with respect to their mesh diagonal are oriented at a right angle to the strip edge, that in addition the prepared strip beginning is fed to a first rotationally drivable pair of rollers (5) of a drawing-open unit by the strip beginning being placed on the preferably
    lower roller which is in the form of a spiked roller (5.1) so that the spikes (6) pass into the meshes and then the preferably upper roller which is provided with bars and recesses (7) and which is in the form of a pressure roller (5.2) is positioned towards the lower roller so that the two rollers (5) form a rolling gap between them, wherein the arrangement of the spikes
    (6) is so selected that - in both orthogonal directions - each second mesh is shaped by a spike (6) by virtue of the spikes (6) of the spiked roller (5.1) passing into the recesses (7) in the pressure roller (5.2).
  2. A method according to claim 1 characterised in that the respective second mesh as viewed in the longitudinal direction of the strip and which is at the edge is drawn open by an axially displaceable spike (9) which is moved by way of a control slider (10) at the edge of the spiked roller (5.1).
  3. A method according to claim 1 or claim 2 characterised in that the drawn-open mat structure which is initially roughly shaped is fed to a further roller pair for post-shaping, wherein said roller pair in its surface structure substantially corresponds to the first roller pair but with double
    the number of spikes and a correspondingly modified configuration of the upper roller in order to compensate for resilient return forces of the mat structure and to achieve good dimensional accuracy.
  4. A method according to claim 3 characterised in that the first and
    the second roller pairs are oriented relative to each other in such a way that the spikes (6) of the second roller respectively pass into all meshes.
  5. A method according to claims 1 to 4 characterised in that the spikes (6) of the first and second roller pair are of a pyramid-shaped or
    truncated pyramid-shaped configuration, which are of a symmetrical or asymmetrical configuration depending on the respective position.
  6. A method according to claims 1 to 5 characterised in that a third roller pair is disposed downstream of the second roller pair, wherein the
    one roller (14.1) is provided with guide receiving means for the metal strands (11) whereby the net nodes (4) connecting the metal strands (11) are precisely positioned on said roller and are pressed in the guide receiving means by discs (12) which are provided on the second roller (14.2) and which are arranged with a mutual spacing in the axial direction,
    wherein further arranged between the discs (12) are push members (13) which are oriented centrally relative to the net nodes (4) and press same into cutting blades (15) of the first roller (14.1) whereby the terminating separation cracks which end at the net nodes (4) and remain from rolling and severing of the metal strands (11) are cut out.
  7. A method according to claim 6 characterised in that the cutting
    device is of such a configuration that the region which adjoins the net
    nodes (4) and which is formed by the metal strands (11) which meet there is provided with a small radius and the tool is so designed that after the cutting process smoothing of the surface with a build-up of compressive stress is also achieved.
  8. Apparatus for carrying out the method according to claims 1 to 7 characterised by a drawing-open unit having a first rotationally drivable roller pair (5) in which the preferably lower roller is in the form of a spiked roller (5.1) and the preferably upper roller provided with bars and recesses
    (7) is in the form of a pressure roller (5.2) which can be positioned towards the lower roller so that the two rollers (5) form between them a rolling gap for profiled metal strip material (11) of a net-like mat structure, wherein the arrangement of the spikes (6) is so selected that - in both orthogonal directions - each second mesh of the mat structure is formed by a spike
    20(6) by the spikes (6) of the spiked roller (5.1) engaging into the recesses (7) in the pressure roller (5.2).
  9. Apparatus according to claim 8 characterised in that at the edge the spiked roller (5.1) has an axially displaceable spike (9) which is moved
    by way of a control slider (10) at the edge of the spiked roller (5.1) and as viewed in the longitudinal direction of the strip draws open each second mesh.
  10. Apparatus according to claim 8 or claim 9 characterised in that
    the drawing-open unit has a further roller pair for post-shaping of the strip material, wherein said roller pair in its surface structure substantially corresponds to the first roller pair but with double the number of spikes and a correspondingly modified configuration of the upper roller in order to compensate for resilient return forces present in the shaped mat structure of the strip material and to achieve good dimensional accuracy.
  11. Apparatus according to claim 10 characterised in that the first and the second roller pairs are oriented relative to each other in such a way that the spikes of the second roller respectively pass into all meshes of the mat structure.
  12. Apparatus according to claims 8 to 11 characterised in that the
    spikes (6) of the first and second roller pairs are of a pyramid-shape or truncated pyramid-shape configuration, which are of a symmetrical or asymmetrical configuration depending on the respective position.
  13. Apparatus according to claims 8 to 12 characterised in that a
    third roller pair is disposed downstream of the second roller pair, wherein the lower roller (14.1) is provided with guide receiving means for positioning the net nodes (4) connecting the metal strands (11) while provided on the upper roller (14.2) are discs (12) which are arranged at a mutual spacing and by which the net nodes (4) are pressed in the axial
    direction into the guide receiving means, wherein arranged between the discs (12) are push members (13) which are oriented centrally relative to the net nodes (4) and press same into cutting blades (15) of the lower roller (14.1) whereby the terminating separating cracks which end at the net nodes (4) and which remain from rolling and severing of the metal strands (11) are cut out.
  14. Apparatus according to claim 13 characterised in that the cutting device is of a round configuration so that the region which adjoins the net nodes (4) and which is formed by the metal strands (11) meeting there is
    provided with a small radius, wherein the tool is of such a design that after the cutting process smoothing of the surface with simultaneous build-up of compressive stress is achieved.
EP18778360.0A 2017-10-07 2018-08-18 Method for expanding and formatting profiled metal strip material to form a netting-like mat structure and apparatus for carrying out the method Active EP3691808B1 (en)

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DE102017009311.3A DE102017009311A1 (en) 2017-10-07 2017-10-07 A method for spreading and formatting profiled metallic strip material into a net-like mat structure and apparatus for carrying out the method
PCT/DE2018/000245 WO2019068274A1 (en) 2017-10-07 2018-08-18 Method for expanding and formatting profiled metal strip material to form a netting-like mat structure and apparatus for carrying out the method

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JP (1) JP7097955B2 (en)
CN (1) CN111315504B (en)
DE (1) DE102017009311A1 (en)
EA (1) EA202090869A1 (en)
ES (1) ES2907179T3 (en)
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US3760470A (en) * 1971-02-08 1973-09-25 Exmet Corp Apparatus and method for producing expanded metal
US3853626A (en) 1973-09-20 1974-12-10 Gen Motors Corp Method and apparatus for making expanded metal lead-acid battery grids
GB1442936A (en) * 1973-09-20 1976-07-14 Gen Motors Corp Method and apparatus for making expanded metal lead-acid storage battery grids
US4247970A (en) * 1979-04-11 1981-02-03 Bernal Rotary Systems, Inc. Apparatus for forming expanded metal such as battery grids
JPS5744428A (en) * 1980-08-28 1982-03-12 Matsushita Electric Ind Co Ltd Manufacture of grid for lead storage battery
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CN202606649U (en) * 2012-04-19 2012-12-19 广州市金洁达机电科技有限公司 Three-dimensional ribbed mesh roll finishing device
CN203556718U (en) * 2013-10-31 2014-04-23 广东好太太电器有限公司 Construction formwork expansion web machine with automatic grinding device
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CN103962429A (en) * 2014-04-10 2014-08-06 东华大学 Method and structure for forming filter screen
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JP7097955B2 (en) 2022-07-08
JP2020536739A (en) 2020-12-17
US20200230684A1 (en) 2020-07-23
DE102017009311A1 (en) 2019-04-11
HUE057401T2 (en) 2022-05-28
WO2019068274A1 (en) 2019-04-11
PL3691808T3 (en) 2022-04-19
CN111315504B (en) 2022-11-22
ES2907179T3 (en) 2022-04-22
CN111315504A (en) 2020-06-19
EA202090869A1 (en) 2020-06-26
BR112020006308A2 (en) 2020-09-24
US11458522B2 (en) 2022-10-04

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