EP0304562A2 - Method for bending a strip with a profiled region at its longitudinal edge - Google Patents

Method for bending a strip with a profiled region at its longitudinal edge Download PDF

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Publication number
EP0304562A2
EP0304562A2 EP88108853A EP88108853A EP0304562A2 EP 0304562 A2 EP0304562 A2 EP 0304562A2 EP 88108853 A EP88108853 A EP 88108853A EP 88108853 A EP88108853 A EP 88108853A EP 0304562 A2 EP0304562 A2 EP 0304562A2
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EP
European Patent Office
Prior art keywords
strip
profile
frame
longitudinal edge
bending
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP88108853A
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German (de)
French (fr)
Other versions
EP0304562A3 (en
Inventor
Rudolf Tschopp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meto-Bau AG
Meto Bau AG
Original Assignee
Meto-Bau AG
Meto Bau AG
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Publication date
Application filed by Meto-Bau AG, Meto Bau AG filed Critical Meto-Bau AG
Publication of EP0304562A2 publication Critical patent/EP0304562A2/en
Publication of EP0304562A3 publication Critical patent/EP0304562A3/en
Withdrawn legal-status Critical Current

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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
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
    • B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
    • B21D19/043—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers for flanging edges of plates

Definitions

  • the present invention relates to a method according to the preamble of patent claim 1.
  • sealing strips are often to be installed between the frame and the door, which seal the interior of the control cabinet against the outside atmosphere.
  • the attachment of such seals requires a corresponding front design (such as welded-on ribs or the like) of the frame, which takes place in several complex work steps in all known manufacturing processes.
  • the design of the corners, in particular, requires special effort since the tightness must also be guaranteed there.
  • the object of the present invention is to create a method which allows strips to be bent into frames and, at the same time, to design the front appropriately without requiring any subsequent effort.
  • the invention relates to a frame produced by the method, which is characterized in that the side walls front and / or back along the Area (including the bends) are provided with a circumferential profile formed by plastic deformation.
  • Such frames are particularly suitable as high-precision frames for control cabinets.
  • the profile has a cone or pyramid-shaped suit against the front and / or back, in particular the profile following the cone or pyramid-shaped suit has a rib perpendicular to the plane of the front or back forms. If such a frame is used as a frame for a control cabinet, this embodiment has the advantage that a sealing strip can be reliably attached to the rib and supported tightly against the conical or pyramid-shaped suit without any additional work on the front design of the frame.
  • the sheet metal strip 1 For the production of a metal frame profiled along the front or rear edge region (FIG. 7), the sheet metal strip 1 provided for this purpose is first cut to length according to the frame circumference. The transverse edges are to be aligned precisely with respect to the longitudinal center axis of the sheet metal strip 1, so that they meet with their end faces flush on the finished sheet metal strip, and the clear frame cross section is exactly achieved. After cutting to length, depending on the application requirement, the area 3 of a longitudinal edge of the metal strip 1 (or both) is provided with the desired profile between profiling rolls 2 or by means of a folding machine (FIGS. 1 and 2). If a sheet metal strip 1 prepared in this way is to be bent into a frame with a rectangular cross section (FIG. 2), its four corner regions are successively placed between a punch 4 and a die 5. If one of the corner areas is between the two tools 4 and 5, the die is pressed against the stationary punch and the sheet metal strip is bent by 90 °.
  • the die 5 and the punch 4 protrude at right angles from a table plane 6 of a bending machine, on which the die 5 can be moved back and forth in the direction of the double arrow shown in FIG. 4 against the stationary punch 4.
  • the die 5 can be driven mechanically or hydraulically.
  • the flat surfaces 7 and 8 facing the die 4 on the die 5 intersect at right angles and are connected to one another by a fillet 9.
  • the stamp 4 is provided with surfaces 7, 8, 9 corresponding parallel surfaces 10 to 12, the reference number 12 designating a rounded edge which fits into the fillet 9.
  • the surfaces 7 to 9 and 10 to 12 in an area adjacent to the table plane 6 are provided with complementary shapes simulating the profile area 3.
  • the profile of the sheet metal strip 1 also extends around its rounded corner edge after the die 5 has been pressed against the punch and the sheet metal strip has been bent through 90 °.
  • the die 5 is provided with a rib 13 and the punch with a groove-like recess 14.
  • the table level 6 is provided with an opening 16 through which excess material can escape downwards during the bending and pressing of the frame corners in the sheet metal strip.
  • a knife can be moved between the position shown in FIG. 4 and the position shown in FIG. 6, the cutting edge of which moves in the table plane 6. After the pressing and bending process has been completed, this knife is used to shear off the downward-moving material which forms a flap 18, so that the corner regions in the frame front plane are also precisely coplanar.
  • the method and the device function as follows.
  • the edge area 3 is first profiled by rolling or bending on a sheet metal strip 1 (FIGS. 1 and 2). Before or after, the metal strip 1 is cut to length according to the circumference of the frame. The sheet metal strip 1 cut to length is then bent four times at right angles between the tools 4 and 5. Here, the geometric center lines of the provided corners 19, 21 to 23 are brought into contact with the center line of the rounded corner 12 of the punch 4 and the die 5 is pressed against the punch 4.
  • the sheet metal strip 1 is bent by 90 °, the edge profiling on the sheet metal strip 1 being retained because of the complementary shapes of the rib 13 and the recess 14 and being forced in the region of the corners 19, 21 to 23.
  • the edge profiling at the corners 19, 21 to 23 an excess of material arises in these areas, which escapes into the opening 16 in the form of a flap.
  • the knife 17 is moved from its rear end position (FIG. 4) into the front end position (FIG. 6) and the tab as long as the tools 4 and 5 are still held in the closed and pressed position 18 sheared off.
  • the corner regions 19, 21 to 23 are on the Front coplanar with the frame front level. After the fourth bend, the end faces of the metal strip 1 abut one another flush and can be welded by means of a seam 20.
  • the example described above is not limited to frames with a rectangular or square light cross section.
  • the clear cross section can also be a triangle or a polygon, a circle, an ellipse or the like, which only requires correspondingly designed surfaces 7 and 8 or 10 and 11 on the die 5 or the punch 4.

Abstract

In order to ensure a satisfactory shape of the profile, including the bending zone, without subsequent work following the bending operation, provision is made for at least zone (3) to be formed to a certain profile along a longitudinal edge, after which the strip (1) is bent and any deformation in the profile which occurs during this operation is corrected by pressing, and for any strip material (18) which becomes superfluous in the bending zone during this operation to be essentially pressed out to one side and then cut off flush with the longitudinal edge of the strip (1). <IMAGE>

Description

Die vorliegende Erfindung bezieht sich auf ein Verfahren gemäss dem Oberbegriff des Patentanspruchs 1.The present invention relates to a method according to the preamble of patent claim 1.

Bei Schaltschränken sind zwischen Zarge und Türe oft Dichtungs­streifen anzubringen, die den Innenraum des Schaltschrankes gegen die Aussenatmosphäre abdichten. Das Anbringen solcher Dichtungen setzt eine entsprechende frontseitige Gestaltung (wie angeschweisste Rippen oder dgl.) der Zarge voraus, was bei allen bekannten Herstellungsverfahren in mehreren auf­wendigen Arbeitsgängen erfolgt. Dabei erfordert insbesondere die Gestaltung der Ecken einen besonderen Aufwand, da auch dort die Dichtheit gewährleistet sein muss.In control cabinets, sealing strips are often to be installed between the frame and the door, which seal the interior of the control cabinet against the outside atmosphere. The attachment of such seals requires a corresponding front design (such as welded-on ribs or the like) of the frame, which takes place in several complex work steps in all known manufacturing processes. The design of the corners, in particular, requires special effort since the tightness must also be guaranteed there.

Die vorliegende Erfindung stellt sich die Aufgabe, ein Ver­fahren zu schaffen, das es erlaubt, Streifen zu Zargen zu biegen und gleichzeitig die Frontseite zweckmässig zu gestal­ten, ohne dass dadurch ein nachträglicher Aufwand erforder­lich ist.The object of the present invention is to create a method which allows strips to be bent into frames and, at the same time, to design the front appropriately without requiring any subsequent effort.

Erfindungsgemäss wird diese Aufgabe gelöst durch die kenn­zeichnenden Merkmale des Anspruches 1.According to the invention, this object is achieved by the characterizing features of claim 1.

Weiter bezieht sich die Erfindung auf einen nach dem Verfahren hergestellten Rahmen, der dadurch gekennzeichnet ist, dass dessen Seitenwände front- und/oder rückseitig entlang dem Bereich (unter Einschluss der Biegungen) mit einem umlaufenden, durch plastische Verformung gebildeten Profil versehen sind. Solche Rahmen eignen sich vorzüglich als hochpräzise Zargen für Schaltschränke.Furthermore, the invention relates to a frame produced by the method, which is characterized in that the side walls front and / or back along the Area (including the bends) are provided with a circumferential profile formed by plastic deformation. Such frames are particularly suitable as high-precision frames for control cabinets.

Nach einer bevorzugten Ausführungsform des Rahmens ist vor­gesehen, dass das Profil gegen die Front- und/oder Rückseite einen kegel- oder pyramidenförmigen Anzug aufweist, wobei insbesondere das Profil anschliessend an den kegel- oder pyramidenförmigen Anzug eine zur Ebene der Front- oder Rückseite rechtwinklige Rippe bildet. Wird ein solcher Rahmen als Zarge für einen Schaltschrank verwandt, ergibt sich aus dieser Ausführungsform der Vorteil, dass ohne jede zusätzliche Arbeit an der frontseitigen Gestaltung der Zarge ein Dich­tungsstreifen zuverlässig an der Rippe aufgesteckt und dicht gegen den kegel- oder pyramidenförmigen Anzug abgestützt werden kann.According to a preferred embodiment of the frame, it is provided that the profile has a cone or pyramid-shaped suit against the front and / or back, in particular the profile following the cone or pyramid-shaped suit has a rib perpendicular to the plane of the front or back forms. If such a frame is used as a frame for a control cabinet, this embodiment has the advantage that a sealing strip can be reliably attached to the rib and supported tightly against the conical or pyramid-shaped suit without any additional work on the front design of the frame.

Anhand der beiliegenden schematischen Zeichnung wird die Erfindung beispielsweise erläutert. Es zeigen:

  • Fig. 1 das Profilieren eines Blechstreifens entlang einem seiner beiden Randbereiche,
  • Fig. 2 einen Schnitt durch den profilierten Blechstreifen längs der Linie II-II,
  • Fig. 3 eine perspektivische Darstellung des Biegens des pro­filierten Blechstreifens,
  • Fig. 4 bis 6 einen Schnitt längs der Linie VI-VI in Fig. 3, wobei die Biegewerkzeuge in verschiedenen Stellungen gezeigt sind und
  • Fig. 7 eine perspektivische Darstellung einer Zarge mit einem rechteckigen lichten Querschnitt.
The invention is explained, for example, with the aid of the attached schematic drawing. Show it:
  • 1 the profiling of a sheet metal strip along one of its two edge areas,
  • 2 shows a section through the profiled sheet metal strip along the line II-II,
  • 3 is a perspective view of the bending of the profiled sheet metal strip,
  • Fig. 4 to 6 is a section along the line VI-VI in Fig. 3, wherein the bending tools are shown in different positions and
  • Fig. 7 is a perspective view of a frame with a rectangular clear cross section.

Für das Herstellen einer entlang dem vorderen oder hinteren Randbereich profilierten Metallzarge (Fig. 7) wird zuerst der hierfür vorgesehene Blechstreifen 1 entsprechend dem Zargenumfang abgelängt. Die Querkanten sind dabei genau mit Bezug auf die Längsmittelachse des Blechstreifens 1 auszu­richten, so dass sie am fertig gebogenen Blechstreifen mit ihren Stirnseiten bündig aufeinander treffen, und der lichte Zargenquerschnitt dabei genau erreicht ist. Nach dem Ablängen wird, je nach Anwendungsbedürfnis, der Bereich 3 eines Längs­randes des Blechstreifens 1 (oder auch beide) zwischen Profi­lierwalzen 2 oder mittels einer Abkantmaschine mit dem gewünsch­ten Profil versehen (Fig. 1 und 2). Ist ein derart vorberei­teter Blechstreifen 1 zu einer im Querschnitt rechteckigen Zarge (Fig. 2) zu biegen, werden nacheinander seine vier Eckbereiche zwischen einen Stempel 4 und eine Matrize 5 ge­bracht. Befindet sich jeweils einer der Eckbereiche zwischen den beiden Werkzeugen 4 und 5, wird die Matrize gegen den ruhenden Stempel gepresst und der Blechstreifen um 90° gebogen.For the production of a metal frame profiled along the front or rear edge region (FIG. 7), the sheet metal strip 1 provided for this purpose is first cut to length according to the frame circumference. The transverse edges are to be aligned precisely with respect to the longitudinal center axis of the sheet metal strip 1, so that they meet with their end faces flush on the finished sheet metal strip, and the clear frame cross section is exactly achieved. After cutting to length, depending on the application requirement, the area 3 of a longitudinal edge of the metal strip 1 (or both) is provided with the desired profile between profiling rolls 2 or by means of a folding machine (FIGS. 1 and 2). If a sheet metal strip 1 prepared in this way is to be bent into a frame with a rectangular cross section (FIG. 2), its four corner regions are successively placed between a punch 4 and a die 5. If one of the corner areas is between the two tools 4 and 5, the die is pressed against the stationary punch and the sheet metal strip is bent by 90 °.

Die Matrize 5 und der Stempel 4 überragen rechtwinklig eine Tischebene 6 einer Biegemaschine, auf der die Matrize 5 in Richtung des in Fig. 4 eingezeichneten Doppelpfeils gegen den ruhenden Stempel 4 hin und her bewegbar ist. Der Antrieb der Matrize 5 kann mechanisch oder hydraulisch erfolgen. Bei der Herstellung einer Zarge mit rechteckigem lichtem Querschnitt schneiden sich die dem Stempel 4 zugewandten, ebenen Flächen 7 und 8 an der Matrize 5 rechtwinklig und sind durch eine Hohlkehle 9 miteinander verbunden. Der Stempel 4 ist mit den Flächen 7, 8, 9 entsprechenden paral­lelen Flächen 10 bis 12 versehen, wobei die Hinweisziffer 12 eine in die Hohlkehle 9 passende, gerundete Kante bezeichnet.The die 5 and the punch 4 protrude at right angles from a table plane 6 of a bending machine, on which the die 5 can be moved back and forth in the direction of the double arrow shown in FIG. 4 against the stationary punch 4. The die 5 can be driven mechanically or hydraulically. When producing a frame with a rectangular light cross-section, the flat surfaces 7 and 8 facing the die 4 on the die 5 intersect at right angles and are connected to one another by a fillet 9. The stamp 4 is provided with surfaces 7, 8, 9 corresponding parallel surfaces 10 to 12, the reference number 12 designating a rounded edge which fits into the fillet 9.

Wie die Fig. 3 bis 6 zeigen, sind die Flächen 7 bis 9 und 10 bis 12 in einem an die Tischebene 6 angrenzenden Bereich mit komplementären, dem Profilbereich 3 nachgebildeten Formen versehen. Dadurch verläuft das Profil des Blechstreifens 1 auch um dessen gerundete Eckkante, nachdem die Matrize 5 gegen den Stempel gepresst und der Blechstreifen um 90° ge­bogen wurde. Zur Bildung der komplementären Formen ist die Matrize 5 mit einer Rippe 13 und der Stempel mit einer hohl­kehlenartigen Ausnehmung 14 versehen.As shown in FIGS. 3 to 6, the surfaces 7 to 9 and 10 to 12 in an area adjacent to the table plane 6 are provided with complementary shapes simulating the profile area 3. As a result, the profile of the sheet metal strip 1 also extends around its rounded corner edge after the die 5 has been pressed against the punch and the sheet metal strip has been bent through 90 °. To form the complementary shapes, the die 5 is provided with a rib 13 and the punch with a groove-like recess 14.

In der Verlängerung der gerundeten Kante 12 nach unten ist die Tischebene 6 mit einer Durchbrechung 16 versehen, durch welche während des Biegens und Pressens der Zargenecken im Blechstreifen überschüssiges Material nach unten ausweichen kann. In dieser Durchbrechung ist ein Messer zwischen der in Fig. 4 und der in Fig. 6 gezeigten Lage verschiebbar, dessen Schneidkante sich in der Tischebene 6 bewegt. Mit diesem Messer wird nach vollendetem Press- und Biegevorgang das nach unten ausweichende, einen Lappen 18 bildende Material abgeschert, so dass in der Zargenfrontebene auch die Eck­bereiche genau coplanar ausgerichtet sind. Das Verfahren und die Vorrichtung funktionieren wie folgt.In the extension of the rounded edge 12 downwards, the table level 6 is provided with an opening 16 through which excess material can escape downwards during the bending and pressing of the frame corners in the sheet metal strip. In this opening, a knife can be moved between the position shown in FIG. 4 and the position shown in FIG. 6, the cutting edge of which moves in the table plane 6. After the pressing and bending process has been completed, this knife is used to shear off the downward-moving material which forms a flap 18, so that the corner regions in the frame front plane are also precisely coplanar. The method and the device function as follows.

Soll eine im lichten Querschnitt rechteckige Zarge entsprechend der Fig. 7 hergestellt werden, welche frontseitig einen profi­lierten Randbereich 3 und gerundete Ecken 19 aufweist (wobei das Profil des Bereiches 3 ohne Ausklinkung um die Ecke 19 herumgeführt sein muss) und die längs einer Naht 20 ver­schweisst ist, so wird zuerst an einem Blechstreifen 1 (Fig. 1 und 2) der Randbereich 3 durch Walzen oder Biegen entsprechend profiliert. Vorher oder danach wird der Blechstreifen 1 ent­sprechend dem Umfang der Zarge abgelängt. Der abgelängte Blech­streifen 1 wird darauf viermal zwischen den Werkzeugen 4 und 5 rechtwinklig gebogen. Hierbei werden nacheinander die geome­trischen Mittellinien der vorgesehenen Ecken 19, 21 bis 23 in Anlage mit der Mittellinie der gerundeten Ecke 12 des Stempels 4 gebracht und die Matrize 5 gegen den Stempel 4 gepresst. Bei jedem dieser vier Biege- und Pressvorgänge wird der Blech­streifen 1 jeweils um 90° gebogen, wobei die Randprofilierung am Blechstreifen 1 wegen der komplementären Formen der Rippe 13 und der Ausnehmung 14 erhalten bleibt und im Bereich der Ecken 19, 21 bis 23 erzwungen wird. Während dieses Erzwingens der Randprofilierung an den Ecken 19, 21 bis 23 entsteht in diesen Bereichen ein Materialüberschuss, der in die Durch­brechung 16 lappenförmig ausweicht. Nach der Bildung der Lappen 18 wird, so lange die Werkzeuge 4 und 5 noch in der Schliess- und Pressstellung gehalten sind, das Messer 17 aus seiner hinteren Endlage (Fig. 4) in die vordere Endlage (Fig. 6) verschoben und der Lappen 18 abgeschert. Da der Blechstreifen 1 senkrecht mit seiner profilierten Kante auf der Tischebene 6 steht und die Schneidkante des Messers 17 sich in dieser Ebene bewegt, sind die Eckbereiche 19, 21 bis 23 auf der Frontseite coplanar mit der Zargenfrontebene. Nach der vierten Biegung stossen die endseitigen Stirnflächen des Blechstreifens 1 bündig aneinander und können mittels einer Naht 20 ver­schweisst werden.If a frame with a clear cross-section is to be produced according to FIG. 7, which has a profiled edge area 3 and rounded corners 19 on the front (the profile of area 3 must be led around corner 19 without notching) and welded along a seam 20 is, the edge area 3 is first profiled by rolling or bending on a sheet metal strip 1 (FIGS. 1 and 2). Before or after, the metal strip 1 is cut to length according to the circumference of the frame. The sheet metal strip 1 cut to length is then bent four times at right angles between the tools 4 and 5. Here, the geometric center lines of the provided corners 19, 21 to 23 are brought into contact with the center line of the rounded corner 12 of the punch 4 and the die 5 is pressed against the punch 4. In each of these four bending and pressing operations, the sheet metal strip 1 is bent by 90 °, the edge profiling on the sheet metal strip 1 being retained because of the complementary shapes of the rib 13 and the recess 14 and being forced in the region of the corners 19, 21 to 23. During this enforcement of the edge profiling at the corners 19, 21 to 23, an excess of material arises in these areas, which escapes into the opening 16 in the form of a flap. After the formation of the tabs 18, the knife 17 is moved from its rear end position (FIG. 4) into the front end position (FIG. 6) and the tab as long as the tools 4 and 5 are still held in the closed and pressed position 18 sheared off. Since the sheet metal strip 1 stands vertically with its profiled edge on the table plane 6 and the cutting edge of the knife 17 moves in this plane, the corner regions 19, 21 to 23 are on the Front coplanar with the frame front level. After the fourth bend, the end faces of the metal strip 1 abut one another flush and can be welded by means of a seam 20.

Das vorbeschriebene Beispiel ist nicht auf Zargen mit recht­eckigem oder quadratischem lichtem Querschnitt beschränkt. Der lichte Querschnitt kann auch ein Dreieck oder ein Vieleck, ein Kreis, eine Ellipse oder dgl. sein, was lediglich ent­sprechend ausgebildete Flächen 7 und 8 bzw. 10 und 11 an der Matrize 5 bzw. dem Stempel 4 erfordert.The example described above is not limited to frames with a rectangular or square light cross section. The clear cross section can also be a triangle or a polygon, a circle, an ellipse or the like, which only requires correspondingly designed surfaces 7 and 8 or 10 and 11 on the die 5 or the punch 4.

Claims (7)

1. Verfahren zum Biegen eines Streifens (1) an dessen front- und/oder rückseitigem Längsrand ein profilierter Bereich (3) anschliesst, dadurch gekennzeichnet, dass wenigstens der Bereich (3) entlang einem Längsrand auf ein bestimmtes Profil verformt wird, dass danach der Streifen (1) gebogen und eine dabei auftretende Deformation im Profil durch Pressen korri­giert wird, und dass dabei im Biegebereich überschüssig wer­dendes Streifenmaterial (18) im wesentlichen nach einer Seite weggepresst und danach bündig mit der Längskante des Streifens (1) abgetrennt wird.1. A method for bending a strip (1) at the front and / or rear longitudinal edge of a profiled area (3), characterized in that at least the area (3) is deformed along a longitudinal edge to a specific profile, that the The strip (1) is bent and any deformation in the profile that occurs is corrected by pressing, and in the process, excess strip material (18) in the bending area is essentially pressed away to one side and then cut off flush with the longitudinal edge of the strip (1). 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Streifen (1) zu einem rahmenförmigen Gebilde gebogen wird.2. The method according to claim 1, characterized in that the strip (1) is bent into a frame-shaped structure. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass der Streifen (1) vor oder nach der Randprofilierung auf den Umfang eines geschlossenen Rahmens abgelängt und derart gebogen wird, dass die endseitigen Stirnflächen stumpf auf­einander treffen, und dass danach diese Stirnflächen fest miteinander verbunden werden.3. The method according to claim 2, characterized in that the strip (1) before or after the edge profiling to the circumference of a closed frame and is bent such that the end faces meet butt, and that these end faces are then firmly connected to each other . 4. Nach dem Verfahren gemäss Anspruch 1 hergestellter Rahmen, dadurch gekennzeichnet, dass dessen Seitenwände front- und/oder rückseitig entlang dem Bereich (3) eines Längsrandes (unter Einschluss der Biegungen) mit einem umlaufenden, durch plastische Verformung gebildeten Profil versehen sind.4. Frame produced by the method according to claim 1, characterized in that its side walls are provided on the front and / or rear side along the region (3) of a longitudinal edge (including the bends) with a circumferential profile formed by plastic deformation. 5. Rahmen nach Anspruch 4, dadurch gekennzeichnet, dass das Profil gegen die Front- und/oder Rückseite einen kegel- oder pyramidenförmigen Anzug aufweist.5. Frame according to claim 4, characterized in that the profile has a conical or pyramid-shaped suit against the front and / or back. 6. Rahmen nach Anspruch 5, dadurch gekennzeichnet, dass das Profil anschliessend an den kegel- oder pyramiden­förmigen Anzug eine zur Ebene der Front- oder Rückseite recht­winklige Rippe bildet.6. Frame according to claim 5, characterized in that the profile subsequent to the conical or pyramid-shaped suit forms a rib perpendicular to the plane of the front or back. 7. Vorrichtung zum Anbringen einer Biegung in einem Streifen (1), der einen profilierten Bereich (3) entlang eines seiner Längsränder aufweist, gekennzeichnet durch eine Tisch­ebene (6) und einen diese überragenden Stempel (4), gegen den eine auf der Tischebene (6) hin und her verschiebbare Matrize (5) pressbar ist, wobei der Stempel (4) und die Matrize (5) dem Radius der Biegung und dem Profil entsprechende, komplementäre Pressflächen aufweisen, derart dass der dem Profil entsprechende Teil der Pressflächen unmittelbar an die Tischebene (6) angrenzt, durch eine in der Verlängerung der Pressfläche (10 bis 12) des Stempels (4) in der Tisch­ebene (6) vorhandene Durchbrechung (16) in der ein Messer (17) hin und her verschiebbar gelagert ist, dessen Schneidkante in der Tischebene (6) liegt.7. Device for applying a bend in a strip (1), which has a profiled area (3) along one of its longitudinal edges, characterized by a table plane (6) and a stamp (4) projecting therefrom, against which one on the table plane ( 6) back and forth displaceable die (5) can be pressed, the punch (4) and the die (5) having complementary pressing surfaces corresponding to the radius of the bend and the profile, so that the part of the pressing surfaces corresponding to the profile directly contacts the Adjacent to the table plane (6), through an opening (16) in the extension of the pressing surface (10 to 12) of the punch (4) in the table plane (6) in which a knife (17) is slidably mounted back and forth, the cutting edge lies in the table level (6).
EP88108853A 1987-08-26 1988-06-03 Method for bending a strip with a profiled region at its longitudinal edge Withdrawn EP0304562A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH328187A CH674322A5 (en) 1987-08-26 1987-08-26
CH3281/87 1987-08-26

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EP0304562A2 true EP0304562A2 (en) 1989-03-01
EP0304562A3 EP0304562A3 (en) 1989-08-09

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EP (1) EP0304562A3 (en)
CH (1) CH674322A5 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2055185A (en) * 1934-10-20 1936-09-22 Bell Telephone Labor Inc Method of forming containers
US2476596A (en) * 1949-07-19 Bending and anvil die for fmgmt
US2884985A (en) * 1957-05-20 1959-05-05 Itt Punch and die for bending channel member
DE3336833A1 (en) * 1983-10-10 1985-04-25 Hermann Klann Metall- und Blechwarenfabrik GmbH, 8300 Landshut Apparatus for the production of polygonal or round cans

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2476596A (en) * 1949-07-19 Bending and anvil die for fmgmt
US2055185A (en) * 1934-10-20 1936-09-22 Bell Telephone Labor Inc Method of forming containers
US2884985A (en) * 1957-05-20 1959-05-05 Itt Punch and die for bending channel member
DE3336833A1 (en) * 1983-10-10 1985-04-25 Hermann Klann Metall- und Blechwarenfabrik GmbH, 8300 Landshut Apparatus for the production of polygonal or round cans

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CH674322A5 (en) 1990-05-31
EP0304562A3 (en) 1989-08-09

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