EP1197272B1 - Bending machine with two rolls and method of round bending plates - Google Patents

Bending machine with two rolls and method of round bending plates Download PDF

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Publication number
EP1197272B1
EP1197272B1 EP01122326A EP01122326A EP1197272B1 EP 1197272 B1 EP1197272 B1 EP 1197272B1 EP 01122326 A EP01122326 A EP 01122326A EP 01122326 A EP01122326 A EP 01122326A EP 1197272 B1 EP1197272 B1 EP 1197272B1
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EP
European Patent Office
Prior art keywords
roll
rounding
roller
rollers
sheet
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EP01122326A
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German (de)
French (fr)
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EP1197272A2 (en
EP1197272A3 (en
Inventor
Eugen Müller
Jakob Müller
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Elpatronic AG
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Elpatronic AG
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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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers
    • B21D5/146—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers one roll being covered with deformable material

Definitions

  • the invention relates to a two-roll rounding machine according to the preamble of claim 1 and to a method for rounding sheets according to the preamble of claim 8.
  • Two-roll round machines are known.
  • the sheet to be rounded is sandwiched between a metal round roller and a plastic pressure-elastic coating guide roller, e.g. Neoprene®, wherein the rollers are pressed against each other, so that forms a depressed area in the pressure-elastic coating, in which a deformation of the sheet around the round roller takes place.
  • a plastic pressure-elastic coating guide roller e.g. Neoprene®
  • the rounding of the leading edge and trailing edge regions of the sheet should generally be as good as possible, even for small diameters of the rounded sheet metal pipes of e.g. 30-80 mm.
  • three-roll rotary machines e.g. According to EP-A-0 368 686 or EP-A-0 096 643, the spacing of the two work rolls is kept as low as possible.
  • the plastic coating of the guide roll already produces only a slight flat zone formation, but an improvement is also desirable in this case, in particular in the case of a very small diameter of the round roll in the range of 30 to 80 mm.
  • US-A-3899911 shows a rounding machine with a round roller and two or three pressure-elastic rollers.
  • US-A-2719562 shows a rounding machine with a round roller and a pressure-elastic roller, which is supported by two further rollers.
  • the invention is therefore based on the object to provide an improved two-roll rounding machine.
  • two such additional pressure-elastic rollers are provided, which in particular results in a good rounding when stabilized against bending round roller.
  • one or more support rollers are provided, which in turn support the pressure-elastic rollers, wherein the support rollers are generally not rollers with pressure-elastic coating (and therefore can be referred to as pressure-rigid rollers).
  • At least one guide device which guides the sheet emerging from the first pair of rollers (guide roller, round roller) to the second roller pair (round roller, further roller).
  • the invention is further based on the object to provide a rounding method which does not have the disadvantages mentioned.
  • FIG. 1 shows a roughly schematically a first embodiment of a two-roll rounding machine 1.
  • This machine has a machine frame shown only as a box 2, in which the axes of the rollers and rollers of the machine are mounted, wherein the schematic representation shows the axes perpendicular to the plane of the drawing.
  • the schematic representation shows the axes perpendicular to the plane of the drawing.
  • an electronic control 16 is provided which controls the drive.
  • FIG. 1 shows the guide roller 3 of the round machine with its coating 5 elastically deformable on pressure. This coating is known in such machines plastic coating and will not be explained here. Due to this coating, the roller 3 is referred to below as a pressure-elastic guide roller.
  • the roller is mounted rotatably about its axis 4 in the machine frame 2.
  • the round roller of the rounding machine is referred to, this roller carries no pressure-elastic coating and therefore hereinafter referred to as pressure-tight round roller.
  • Figure 1 shows this roller spaced from the guide roller 3, so that the sheet 20 to be rounded can be inserted between the rollers.
  • FIG. 2 wherein like reference numerals designate like elements in Fig. 1, shows the actual round position in which the circular roller 6 is pressed against the guide roller 3, so that the circular roller 6 creates a depression in the pressure-elastic coating 5 of the guide roller, which Pressing the sheet to be rounded causes the round roller.
  • the sheet is rounded in a conventional manner by the round roller 6 is driven by the drive 17, which results in the rotational movement of the rollers shown in Fig. 2 with arrows, and causes the sheet 20 is drawn between the rolls 3 and 6 and rounded around the roll 6.
  • rollers 8 and 11 with their coatings 10 and 13 and the axes of rotation 9 and 12, which are parallel to the axes of rotation 4 and 7 of the rollers 3 and 5, laterally in the side facing away from the guide roller 3 region of the circular roller. 6 arranged.
  • the rollers 8 and 11 are arranged symmetrically to the plane E, which is spanned by the axes 4 and 7.
  • these rollers provide support for the round roller 6, which is particularly advantageous in the case of round rollers 6 with a small diameter, in particular in the diameter range from 30 to 80 mm is.
  • a particularly good rounding results when the sheet 20 passes twice through said rollers, so after the first rounding operation by means of the roller pairs 3 and 6, or 8 and 6 and 11 and 6 is again passed through the rollers 3 and 6 and then again by the rollers 10 and 6 and 11 and 6. In this way, unrounded or incorrectly rounded sections are reliably avoided.
  • the Controller 16 of the machine is designed to effect two passes through each sheet.
  • the round roller 6 is again spaced from the guide roller 3, as shown in Figure 1, and also the rollers 8 and 11 are spaced from the circular roller 6 to the rounded sheet perpendicular to the plane of the drawing from the rounding machine to be able to remove.
  • the movement of the rollers 8 and 11 may be a translational movement in the drawing down, or a pivoting movement of the axes of rotation 9 and 12 about a pivot axis in each case to the outside, so that the rollers 8 and 11 release the circular roller 6.
  • the rollers 8 and 11 are then returned to the position shown in Figures 1 and 2.
  • rollers 8 and 11 can also be designed by a series of coaxial lying spaced apart arranged rollers.
  • a support roller 14 is further provided, which in turn supports the pressure-elastic rollers 8 and 11.
  • the support roller 14 is rotatably mounted in the example shown about a rotation axis 5 and is a pressure-rigid support roller, thus has no elastic coating.
  • FIG. 3 shows a further embodiment, wherein like reference numerals, as previously used, denote like elements.
  • a pressure-elastic roller 21 is provided with its coating 23 which is rotatably mounted about an axis 22.
  • this can also be several roles that form the roller together.
  • a pressure-rigid support roller 24 is mounted with its axis of rotation 25, which forms a support for the roller 21.
  • FIG. 4 shows a further exemplary embodiment, wherein the same reference numerals also refer to the same elements here. It is here in turn an embodiment with two pressure-elastic rollers 8 and 11 shown, in which case further a guide 30 is shown, which receives the emerging between the rollers 3 and 6 rounded sheet with its guide surface 31 and performs, such that the rounded sheet in suitable position between the rollers 8 and 6 is introduced.
  • the guide 30 can be prevented with certainty an upsetting or buckling of the sheet 20 at the first contact with the roller 8. In this case, it is generally sufficient to pass through the plate once through the roller pairs 3 and 6, or 8 and 6 and 11 and 6.
  • FIG. 5 shows a further exemplary embodiment, in which the same reference numbers again designate the same elements.
  • This embodiment differs from that of Figures 1 and 2, or 4, characterized in that in addition to the rollers 8 and 13 common support roller 14 additionally each have their own support roller 32 for the roller 8, and 33 for the roller 11, respectively is.
  • the rollers 32 and 33 are each about axes 34, and 35, rotatable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Control And Safety Of Cranes (AREA)
  • Replacement Of Web Rolls (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Abstract

Two roller rounding machine comprises an elastic guide roller (3, 5) and a rigid rounding roller (6). The rounding roller is impinged upon by at least one further elastic roller (8, 10, 11, 13). An Independent claim is also included for a method for rounding sheets to form tubular bodies using the two roller rounding machine by passing a sheet (20) at least twice between the guide roller and the rounding roller. Preferred Features: The further elastic roller is impinged upon by a rigid support roller (14).

Description

Die Erfindung betrifft eine Zweiwalzen-Rundmaschine gemäss Oberbegriff des Anspruchs 1 sowie ein Verfahren zum Runden von Blechen gemäss Oberbegriff des Anspruchs 8.The invention relates to a two-roll rounding machine according to the preamble of claim 1 and to a method for rounding sheets according to the preamble of claim 8.

Zweiwalzen-Rundmaschinen sind bekannt. Bei diesen wird das zu rundende Blech zwischen einer Rundwalze aus Metall und einer Führungswalze mit druckelastischer Beschichtung aus einem Kunststoff, z.B. Neoprene®, hindurchgeführt, wobei die Walzen gegeneinander gedrückt werden, so dass sich in der druckelastischen Beschichtung ein eingedrückter Bereich bildet, in welchem eine Verformung des Bleches um die Rundwalze herum erfolgt.Two-roll round machines are known. In these, the sheet to be rounded is sandwiched between a metal round roller and a plastic pressure-elastic coating guide roller, e.g. Neoprene®, wherein the rollers are pressed against each other, so that forms a depressed area in the pressure-elastic coating, in which a deformation of the sheet around the round roller takes place.

Bei Rundmaschinen soll generell eine möglichst gute Rundung auch des Vorderkanten- und Hinterkantenbereichs des Bleches erfolgen, und dies auch bei kleinen Durchmessern der gerundeten Blechrohre von z.B. 30-80 mm. Bei Dreiwalzen-Rundmaschinen, z.B. gemäss EP-A-0 368 686 oder EP-A-0 096 643 wird dazu der Abstand der beiden Arbeitsrollen möglichst gering gehalten. Bei Zweiwalzen-Rundmaschinen ergibt sich durch die Kunststoffbeschichtung der Führungswalze bereits eine nur geringe Flachzonenbildung, doch ist auch hierbei eine Verbesserung wünschbar, insbesondere bei sehr kleinem Durchmesser der Rundwalze im genannten Bereich von 30 bis 80 mm. US-A-3899911 zeigt eine Rundmaschine mit einer Rundwalze und zwei oder drei druckelastischen Walzen. US-A-2719562 zeigt eine Rundmaschine mit einer Rundwalze und einer druckelastischen Walze, wobei diese durch zwei weitere Walzen abgestützt ist.In round machines, the rounding of the leading edge and trailing edge regions of the sheet should generally be as good as possible, even for small diameters of the rounded sheet metal pipes of e.g. 30-80 mm. In three-roll rotary machines, e.g. According to EP-A-0 368 686 or EP-A-0 096 643, the spacing of the two work rolls is kept as low as possible. In the case of two-roll round machines, the plastic coating of the guide roll already produces only a slight flat zone formation, but an improvement is also desirable in this case, in particular in the case of a very small diameter of the round roll in the range of 30 to 80 mm. US-A-3899911 shows a rounding machine with a round roller and two or three pressure-elastic rollers. US-A-2719562 shows a rounding machine with a round roller and a pressure-elastic roller, which is supported by two further rollers.

Der Erfindung liegt deshalb die Aufgabe zugrunde, eine verbesserte Zweiwalzen-Rundmaschine zu schaffen.The invention is therefore based on the object to provide an improved two-roll rounding machine.

Diese Aufgabe wird bei der Zweiwalzen-Rundmaschine der eingangs genannten Art durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is achieved in the two-roll rounding machine of the type mentioned by the characterizing features of claim 1.

Dadurch, dass eine weitere Walze mit druckelastischer Beschichtung (nachfolgend vereinfacht druckelastische Walze genannt) vorgesehen ist, kann eine weitere Rundung erfolgen, was den Rundungserfolg verbessert. Ferner ergibt diese weitere Walze eine Stabilisierung der Rundwalze gegen Durchbiegung derselben, was besonders bei kleinem Durchmesser der Rundwalze erwünscht ist. Es hat sich gezeigt, dass sich durch zweimaliges Durchlaufen eines Bleches durch eine solche Rundmaschine eine besonders gute Rundung ergibt.Characterized in that another roller with pressure-elastic coating (hereinafter simply called pressure-elastic roller called) is provided, a further rounding can take place, which improves the Rundungserfolg. Furthermore, this further roller provides a stabilization of the round roller against deflection of the same, which is particularly desirable for small diameter of the round roller. It has been found that by passing through a sheet twice through such a rounding machine results in a particularly good rounding.

Bevorzugterweise sind zwei solcher weiterer druckelastischer Walzen vorgesehen, was insbesondere eine gute Rundung bei gegen Durchbiegung stabilisierter Rundwalze ergibt.Preferably, two such additional pressure-elastic rollers are provided, which in particular results in a good rounding when stabilized against bending round roller.

Ferner bevorzugt ist es, wenn eine oder mehrere Stützwalzen vorgesehen sind, welche ihrerseits die druckelastischen Walzen stützen, wobei die Stützwalzen in der Regel keine Walzen mit druckelastischer Beschichtung sind (und daher als druckstarre Walzen bezeichnet werden können).It is also preferred if one or more support rollers are provided, which in turn support the pressure-elastic rollers, wherein the support rollers are generally not rollers with pressure-elastic coating (and therefore can be referred to as pressure-rigid rollers).

Weiter bevorzugt ist es, wenn mindestens eine Leiteinrichtung vorgesehen ist, die das aus dem ersten Walzenpaar (Führungswalze, Rundwalze) austretende Blech zum zweiten Walzenpaar (Rundwalze, weitere Walze) leitet.It is further preferred if at least one guide device is provided, which guides the sheet emerging from the first pair of rollers (guide roller, round roller) to the second roller pair (round roller, further roller).

Der Erfindung liegt ferner die Aufgabe zugrunde ein Rundungsverfahren zu schaffen, welches die genannten Nachteile nicht aufweist.The invention is further based on the object to provide a rounding method which does not have the disadvantages mentioned.

Dies wird bei dem eingangs genannten Verfahren mit den kennzeichnenden Merkmalen des Anspruchs 8 erreicht.This is achieved in the aforementioned method with the characterizing features of claim 8.

Es hat sich gezeigt, dass durch zweimaliges Durchlaufen eines Bleches durch die erfindungsgemässe Rundmaschine eine besonders gute Rundung ergibt.It has been shown that by passing through a sheet twice through the inventive rounding machine results in a particularly good rounding.

Im folgenden werden Ausführungsbeispiele der Erfindung anhand der Zeichnungen näher erläutert. Dabei zeigt:

  • Figur 1 schematisch eine Zweiwalzen-Rundmaschine in einer ersten Position;
  • Figur 2 die Rundmaschine von Figur 1 in einer zweiten Position;
  • Figur 3 ein weiteres Ausführungsbeispiel einer Rundmaschine gemäss der Erfindung;
  • Figur 4 ein Ausführungsbeispiel mit einer Leiteinrichtung; und
  • Figur 5 ein weiteres Ausführungsbeispiel.
In the following embodiments of the invention will be explained in more detail with reference to the drawings. Showing:
  • Figure 1 shows schematically a two-roll rounding machine in a first position;
  • FIG. 2 shows the rounding machine of FIG. 1 in a second position;
  • Figure 3 shows another embodiment of a rounding machine according to the invention;
  • Figure 4 shows an embodiment with a guide; and
  • Figure 5 shows another embodiment.

Figur 1 zeigt grob schematisch ein erstes Ausführungsbeispiel einer Zweiwalzen-Rundmaschine 1. Diese Maschine weist ein nur als Kasten 2 dargestelltes Maschinengestell auf, in welchem die Achsen der Walzen und Rollen der Maschine gelagert sind, wobei die schematische Darstellung die Achsen senkrecht zur Zeichnungsebene zeigt. Im oder am Maschinengestell ist ferner ein nur als Kasten 17 dargestellter Antrieb für die angetriebenen Walzen sowie eine elektronische Steuerung 16 vorgesehen, welche den Antrieb steuert. In Figur 1 ist die Führungswalze 3 der Rundmaschine mit ihrer auf Druck elastisch verformbaren Beschichtung 5 gezeigt. Diese Beschichtung ist eine bei solchen Maschinen bekannte KunststoffBeschichtung und wird hier nicht näher erläutert. Aufgrund dieser Beschichtung wird die Walze 3 nachfolgend als druckelastische Führungswalze bezeichnet. Die Walze ist um ihre Achse 4 drehbar im Maschinengestell 2 gelagert. Mit 6 ist die Rundwalze der Rundmaschine bezeichnet, wobei diese Walze keine druckelastische Beschichtung trägt und daher nachfolgend als druckstarre Rundwalze bezeichnet wird. Figur 1 zeigt diese Walze beabstandet von der Führungswalze 3, so dass das zu rundende Blech 20 zwischen die Walzen eingeschoben werden kann.1 shows a roughly schematically a first embodiment of a two-roll rounding machine 1. This machine has a machine frame shown only as a box 2, in which the axes of the rollers and rollers of the machine are mounted, wherein the schematic representation shows the axes perpendicular to the plane of the drawing. In or on the machine frame is further shown only as a box 17 drive for the driven rollers and an electronic control 16 is provided which controls the drive. FIG. 1 shows the guide roller 3 of the round machine with its coating 5 elastically deformable on pressure. This coating is known in such machines plastic coating and will not be explained here. Due to this coating, the roller 3 is referred to below as a pressure-elastic guide roller. The roller is mounted rotatably about its axis 4 in the machine frame 2. 6, the round roller of the rounding machine is referred to, this roller carries no pressure-elastic coating and therefore hereinafter referred to as pressure-tight round roller. Figure 1 shows this roller spaced from the guide roller 3, so that the sheet 20 to be rounded can be inserted between the rollers.

Figur 2, worin gleiche Bezugsziffern wie in Fig. 1 gleiche Elemente bezeichnen, zeigt die eigentliche Rundposition, in welcher die Rundwalze 6 gegen die Führungswalze 3 gedrückt ist, so dass die Rundwalze 6 eine Vertiefung in der druckelastischen Beschichtung 5 der Führungswalze schafft, welche ein Andrücken des zu rundenden Bleches an die Rundwalze bewirkt. Mittels der beiden genannten Walzen 3 und 6 wird das Blech auf herkömmliche Weise gerundet, indem die Rundwalze 6 durch den Antrieb 17 angetrieben wird, was die in Fig. 2 mit Pfeilen dargestellte Drehbewegung der Walzen ergibt, und bewirkt, dass das Blech 20 zwischen die Walzen 3 und 6 gezogen und um die Walze 6 herum gerundet wird.Figure 2, wherein like reference numerals designate like elements in Fig. 1, shows the actual round position in which the circular roller 6 is pressed against the guide roller 3, so that the circular roller 6 creates a depression in the pressure-elastic coating 5 of the guide roller, which Pressing the sheet to be rounded causes the round roller. By means of the two mentioned rollers 3 and 6, the sheet is rounded in a conventional manner by the round roller 6 is driven by the drive 17, which results in the rotational movement of the rollers shown in Fig. 2 with arrows, and causes the sheet 20 is drawn between the rolls 3 and 6 and rounded around the roll 6.

Gemäss dem in den Figuren 1 und 2 dargestellten Ausführungsbeispiel der Erfindung sind nun zwei weitere druckelastische Walzen, also ebenfalls Walzen mit einer Kunststoffbeschichtung, vorgesehen, welche die druckstarre Rundwalze 6 beaufschlagen. In dem gezeigten Beispiel sind diese beiden Walzen 8 und 11 mit ihren Beschichtungen 10 und 13 und den Drehachsen 9 und 12, welche parallel zu den Drehachsen 4 und 7 der Walzen 3 und 5 verlaufen, seitlich im von der Führungswalze 3 abgewandten Bereich der Rundwalze 6 angeordnet. Die Walzen 8 und 11 sind dabei symmetrisch zur Ebene E angeordnet, welche von den Achsen 4 und 7 aufgespannt wird. Die druckelastischen Walzen 8 und 11 bewirken einerseits jeweils ein erneutes Runden des Bleches 20 um die druckstarre Rundwalze 6. Andererseits bewirken diese Walzen eine Abstützung der Rundwalze 6, was insbesondere bei Rundwalzen 6 mit geringem Durchmesser, insbesondere im Durchmesserbereich von 30 - 80 mm, vorteilhaft ist.According to the exemplary embodiment of the invention shown in FIGS. 1 and 2, there are now two further pressure-elastic rollers, ie also rollers with a plastic coating, which act on the pressure-resistant round roller 6. In the example shown, these two rollers 8 and 11 with their coatings 10 and 13 and the axes of rotation 9 and 12, which are parallel to the axes of rotation 4 and 7 of the rollers 3 and 5, laterally in the side facing away from the guide roller 3 region of the circular roller. 6 arranged. The rollers 8 and 11 are arranged symmetrically to the plane E, which is spanned by the axes 4 and 7. On the other hand, these rollers provide support for the round roller 6, which is particularly advantageous in the case of round rollers 6 with a small diameter, in particular in the diameter range from 30 to 80 mm is.

Das Blech 20, welches nach der ersten Rundung zwischen der Führungswalze 3 und der Rundwalze 6 sich von letzterer wieder ablöst, kann dabei bei der gezeigten Konfiguration mehr oder weniger stumpf auf die Walze 8, bzw. deren Beschichtung 10 auftreffen. Dies kann eine unerwünschte Rundung oder Knickung des Bleches ergeben, welche indes nachfolgend, wenn das Blech zwischen den Walzen 8 und 6 durchläuft und ferner noch zwischen den Walzen 11 und 6, durch die entsprechende Umformung wieder aufgehoben wird. Ein besonders gute Rundung ergibt sich dabei, wenn das Blech 20 zweimal durch die genannten Walzen hindurchläuft, also nach dem ersten Rundungsvorgang mittels der Walzenpaare 3 und 6, bzw. 8 und 6 und 11 und 6 noch einmal durch die Walzen 3 und 6 hindurchgeführt wird und anschliessend erneut durch die Walzen 10 und 6 und 11 und 6. Auf diese Weise werden ungerundete oder nicht korrekt gerundete Abschnitte sicher vermieden. Die Steuerung 16 der Maschine ist entsprechend ausgestaltet, um ein zweimaliges Durchlaufen jedes Bleches zu bewirken.The sheet 20, which after the first rounding between the guide roller 3 and the round roller 6 is detached again from the latter, can impinge more or less dull on the roller 8, or their coating 10 in the configuration shown. This can result in an undesirable rounding or buckling of the sheet, which, however, subsequently, when the sheet passes between the rollers 8 and 6 and also still between the rollers 11 and 6, is canceled by the corresponding deformation again. A particularly good rounding results when the sheet 20 passes twice through said rollers, so after the first rounding operation by means of the roller pairs 3 and 6, or 8 and 6 and 11 and 6 is again passed through the rollers 3 and 6 and then again by the rollers 10 and 6 and 11 and 6. In this way, unrounded or incorrectly rounded sections are reliably avoided. The Controller 16 of the machine is designed to effect two passes through each sheet.

Zur Entnahme des gerundeten Bleches 20 wird die Rundwalze 6 wiederum von der Führungswalze 3 beabstandet, wie dies in Figur 1 gezeigt ist, und ferner werden auch die Walzen 8 und 11 von der Rundwalze 6 beabstandet, um das gerundete Blech senkrecht zur Zeichnungsebene aus der Rundmaschine entnehmen zu können. Die Bewegung der Walzen 8 und 11 kann dabei eine translatorische Bewegung in der Zeichnung nach unten sein, oder eine Schwenkbewegung der Drehachsen 9 und 12 um eine Schwenkachse jeweils nach aussen, so dass die Walzen 8 und 11 die Rundwalze 6 freigeben. Für die nächste Rundungsoperation werden die Walzen 8 und 11 dann wieder in die den Figuren 1 und 2 gezeigte Position verbracht.To remove the rounded sheet 20, the round roller 6 is again spaced from the guide roller 3, as shown in Figure 1, and also the rollers 8 and 11 are spaced from the circular roller 6 to the rounded sheet perpendicular to the plane of the drawing from the rounding machine to be able to remove. The movement of the rollers 8 and 11 may be a translational movement in the drawing down, or a pivoting movement of the axes of rotation 9 and 12 about a pivot axis in each case to the outside, so that the rollers 8 and 11 release the circular roller 6. For the next rounding operation, the rollers 8 and 11 are then returned to the position shown in Figures 1 and 2.

Anstelle von durchgehenden Walzen 8 und 11 können diese auch durch eine Reihe koaxial liegender beabstandet zueinander angeordneter Rollen ausgeführt sein.Instead of continuous rollers 8 and 11, these can also be designed by a series of coaxial lying spaced apart arranged rollers.

Bevorzugterweise ist ferner eine Stützwalze 14 vorgesehen, welche wiederum die druckelastischen Walzen 8 und 11 abstützt. Die Stützwalze 14 ist im gezeigten Beispiel um eine Drehachse 5 drehbar gelagert und ist eine druckstarre Stützwalze, weist also keine elastische Beschichtung auf.Preferably, a support roller 14 is further provided, which in turn supports the pressure-elastic rollers 8 and 11. The support roller 14 is rotatably mounted in the example shown about a rotation axis 5 and is a pressure-rigid support roller, thus has no elastic coating.

Figur 3 zeigt ein weiteres Ausführungsbeispiel, wobei gleiche Bezugszeichen, wie bis anhin verwendet, gleiche Elemente bezeichnen. Auch hierbei erfolgt die Rundung des Bleches 20 zwischen der druckelastischen Führungswalze 4 und der druckstarren Rundwalze 6. Unterhalb derselben ist nun nur eine druckelastische Walze 21 mit ihrer Beschichtung 23 vorgesehen, die um eine Achse 22 drehbar angeordnet ist. Auch hierbei kann es sich natürlich um mehrere Rollen handeln, die zusammen die Walze bilden. Unterhalb dieser Walze ist wiederum eine druckstarre Stützwalze 24 mit ihrer Drehachse 25 gelagert, welche eine Abstützung für die Walze 21 bildet. Diese Walze 21 dient auf die bereits geschilderte Weise zum Runden des Bleches und zur Stützung der Rundwalze 6.Figure 3 shows a further embodiment, wherein like reference numerals, as previously used, denote like elements. Here, too, the rounding of the sheet 20 between the pressure-elastic guide roller 4 and the pressure-rigid round roller 6. Below the same is now only a pressure-elastic roller 21 is provided with its coating 23 which is rotatably mounted about an axis 22. Of course, this can also be several roles that form the roller together. Below this roller, in turn, a pressure-rigid support roller 24 is mounted with its axis of rotation 25, which forms a support for the roller 21. These Roller 21 is used in the manner already described for rounding the sheet and for supporting the round roller. 6

Figur 4 zeigt ein weiteres Ausführungsbeispiel, wobei auch hier gleiche Bezugszeichen gleiche Elemente bezeichnen. Es ist hier wiederum eine Ausführung mit zwei druckelastischen Walzen 8 und 11 dargestellt, wobei hier weiter eine Leiteinrichtung 30 gezeigt ist, die das zwischen den Walzen 3 und 6 austretende gerundete Blech mit ihrer Führungsfläche 31 aufnimmt und führt, derart, dass das gerundete Blech in geeigneter Position zwischen die Walzen 8 und 6 eingeführt wird. Durch die Leiteinrichtung 30 kann mit Sicherheit ein Aufstauchen oder Knicken des Bleches 20 beim erstmaligen Kontakt mit der Walze 8 verhindert werden. In diesem Fall genügt in der Regel ein einmaliges Durchlaufen des Bleches durch die Walzenpaare 3 und 6, bzw. 8 und 6 und 11 und 6.FIG. 4 shows a further exemplary embodiment, wherein the same reference numerals also refer to the same elements here. It is here in turn an embodiment with two pressure-elastic rollers 8 and 11 shown, in which case further a guide 30 is shown, which receives the emerging between the rollers 3 and 6 rounded sheet with its guide surface 31 and performs, such that the rounded sheet in suitable position between the rollers 8 and 6 is introduced. By the guide 30 can be prevented with certainty an upsetting or buckling of the sheet 20 at the first contact with the roller 8. In this case, it is generally sufficient to pass through the plate once through the roller pairs 3 and 6, or 8 and 6 and 11 and 6.

Figur 5 zeigt ein weiteres Ausführungsbeispiel, in welchem wiederum gleiche Bezugszeichen gleiche Elemente bezeichnen. Dieses Ausführungsbeispiel unterscheidet sich von demjenigen der Figuren 1 und 2, bzw. 4, dadurch, dass neben der den Walzen 8 und 13 gemeinsamen Stützwalze 14 noch zusätzlich jeweils eine eigene Stützwalze 32 für die Walze 8, bzw. 33 für die Walze 11, vorgesehen ist. Die Walzen 32 und 33 sind dabei jeweils um Achsen 34, bzw. 35, drehbar. Auch für dieses Beispiel gilt natürlich der geschilderte Einschiebe- und Entladevorgang sowie der entsprechende Antrieb und die Steuerung und der Aufbau einzelner Walzen aus verschiedenen koaxialen Rollen, wie dies bereits geschildert worden ist.FIG. 5 shows a further exemplary embodiment, in which the same reference numbers again designate the same elements. This embodiment differs from that of Figures 1 and 2, or 4, characterized in that in addition to the rollers 8 and 13 common support roller 14 additionally each have their own support roller 32 for the roller 8, and 33 for the roller 11, respectively is. The rollers 32 and 33 are each about axes 34, and 35, rotatable. For this example, of course, the described insertion and unloading and the corresponding drive and the control and the structure of individual rollers of different coaxial rollers, as has already been described.

Claims (8)

  1. Two-roll rounding machine having a compressively elastic guiding roll (3, 5) and a compressively rigid rounding roll (6) wherein the rounding roll is acted upon by at least one additional compressively elastic roll (8, 10; 11, 13; 21, 23) characterised in that the two-roll rounding machine comprises a control device (17) that controls the drive (16) of the driven rolls and is arranged so that a sheet-metal blank (20) to be rounded executes at least two passes through the guiding roll and rounding roll.
  2. Two-roll rounding machine according to claim 1 characterised in that the further compressively elastic roll (8, 10; 11, 13; 21, 23)is acted upon by a compressively rigid supporting roll.
  3. Two-roll rounding machine according to claim 1 or 2, characterised in that two compressively elastic further rolls ((8, 10; 11, 13) are provided which lie on both sides of the plane (E) going through the axes (4, 7) of guiding roll (3, 5) and rounding roll (6).
  4. Two-roll rounding machine according to claim 3, characterised in that both of said two compressively elastic rolls (8, 10; 11, 13) are acted upon by a common compressively rigid supporting roll (14).
  5. Two-roll rounding machine according to claim 3 or claim 4, characterised in that both of said two compressively elastic rolls (8, 10; 11, 13) are acted upon each by an own compressively rigid supporting roll (32, 33).
  6. Two-roll rounding machine according to one of claims 1 to 5 characterising in that a guide device (30, 31) is provided for leading the rounded sheet-metal blank between the rounding roll (6) and the further roll (8).
  7. Two-roll rounding machine according to one of claims 1 to 6, characterising in that the rounding roll has a diameter of 30 mm to 80 mm.
  8. A method for rounding of sheet-metal blanks into tubular bodies by a two-roll rounding machine according to one of claims 1 to 7 characterising in that the sheet-metal blank (20) to be rounded is passed at least two times between the guiding roll (3, 5) and the rounding roll (6).
EP01122326A 2000-10-12 2001-09-19 Bending machine with two rolls and method of round bending plates Expired - Lifetime EP1197272B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH20092000 2000-10-12
CH20092000 2000-10-12

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EP1197272A2 EP1197272A2 (en) 2002-04-17
EP1197272A3 EP1197272A3 (en) 2004-01-14
EP1197272B1 true EP1197272B1 (en) 2006-08-02

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US (1) US6631631B2 (en)
EP (1) EP1197272B1 (en)
AT (1) ATE334760T1 (en)
DE (1) DE50110594D1 (en)
ES (1) ES2269264T3 (en)

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Publication number Priority date Publication date Assignee Title
US7065999B2 (en) * 2001-08-03 2006-06-27 Nippon Steel Corporation Bending roll apparatus
DE102006027046B3 (en) * 2006-06-10 2007-11-22 Lemuth Gmbh Device for the production of a pipe comprises cylindrical rotating rollers running parallel to a molding roller to exert a force in this direction
WO2008134295A1 (en) * 2007-04-27 2008-11-06 Tyco Healthcare Group Lp Apparatus and method for curving surgical needles
DE102008055780A1 (en) 2007-11-05 2009-05-07 Bergrohr Gmbh Siegen Bending machine for metal sheets
PT2110191E (en) 2008-04-18 2011-05-26 Soudronic Ag Rounding device with an articulated preliminary rounding element at the rounding station and method for rounding sheet metal
JP6295175B2 (en) * 2014-10-06 2018-03-14 株式会社日立製作所 Roll forming roll and roll forming method using the same
CN105013894B (en) * 2015-08-06 2017-04-26 上海鼎凡电工机械股份有限公司 Edge rolling mechanism for automatic edge rolling machine
WO2018177876A1 (en) 2017-03-29 2018-10-04 Can Man Ag Method for rounding sheet metal blanks for containers and a longitudinal seam welding machine for producing can bodies, comprising a round station

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1930562A (en) * 1932-08-11 1933-10-17 Bliss E W Co Method and apparatus for forming smoothly rounded can bodies
US2719562A (en) * 1950-07-15 1955-10-04 Raymond E Beegle Apparatus for forming metal channels and tubes
US3899911A (en) * 1974-03-27 1975-08-19 Anvar Sheetmetal rolling machine
DE3539900A1 (en) * 1985-11-11 1987-05-14 Schloemann Siemag Ag DEVICE FOR CONTROLLING THE LIFTING AND PRESSURE MOVEMENTS OF THE TAPE PRESSURE REELS OF ROLLING TAPE REELS
US4964587A (en) * 1986-12-25 1990-10-23 Mitsubishi Jukogyo Kabushiki Kaisha Coiler
DE4236060A1 (en) * 1992-10-26 1994-04-28 Kleiner Matthias Priv Doz Dr I Device and numerical control for two-roll round bending - has conventional two-roll bending unit comprising rigid roll and roll with elastic coating being integrated in conventional press brake
US5361618A (en) * 1993-04-01 1994-11-08 Italimpianti Of America, Inc. Method and apparatus for adjusting bending rolls

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Publication number Publication date
ES2269264T3 (en) 2007-04-01
EP1197272A2 (en) 2002-04-17
DE50110594D1 (en) 2006-09-14
US6631631B2 (en) 2003-10-14
US20020043088A1 (en) 2002-04-18
EP1197272A3 (en) 2004-01-14
ATE334760T1 (en) 2006-08-15

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