EP0462961B1 - Apparatus for bending hollow spaces frames - Google Patents

Apparatus for bending hollow spaces frames Download PDF

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Publication number
EP0462961B1
EP0462961B1 EP91890098A EP91890098A EP0462961B1 EP 0462961 B1 EP0462961 B1 EP 0462961B1 EP 91890098 A EP91890098 A EP 91890098A EP 91890098 A EP91890098 A EP 91890098A EP 0462961 B1 EP0462961 B1 EP 0462961B1
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EP
European Patent Office
Prior art keywords
clamp
bending
countersupport
plane
symmetry
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EP91890098A
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German (de)
French (fr)
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EP0462961B2 (en
EP0462961A1 (en
Inventor
Peter Lisec
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Individual
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Individual
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Priority claimed from AT112690A external-priority patent/AT397054B/en
Priority claimed from AT184090A external-priority patent/AT397775B/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
    • B21D53/00—Making other particular articles
    • B21D53/74—Making other particular articles frames for openings, e.g. for windows, doors, handbags
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/673—Assembling the units
    • E06B3/67304—Preparing rigid spacer members before assembly
    • E06B3/67308—Making spacer frames, e.g. by bending or assembling straight sections
    • E06B3/67313—Making spacer frames, e.g. by bending or assembling straight sections by bending
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/673—Assembling the units
    • E06B2003/67395—Non-planar units or of curvilinear outline, e.g. for vehicles

Definitions

  • the invention relates to a device for bending hollow profile strips, in particular for bending hollow profile strips to spacer frames for insulating glass panes with a clamp for the hollow profile strip, which has two mutually movable clamping jaws for changing the mutual distance, which to the parallel to the bending plane side surfaces of the Bending hollow profile strip can be created, with a support arranged between the clamping jaws for the hollow profile strip to be bent, with an abutment assigned to the clamp, around which is bent and which bears during the bending process against the surface of the hollow profile strip that later forms the inner corner, and with one opposite the clamp Execution of the bending process pivotable bending lever, which can be placed on the section of the hollow profile strip projecting above the clamp.
  • Bending devices of this type are known in various embodiments.
  • Spacer frames made in one piece, with bent corners and devices for producing the same are also known from FR-PS 2 449 222 and DE-OS 32 21 986.
  • a guide is provided, on which the hollow profile strip, which is to be bent to form a spacer frame, is supported, supported at least in the region of the bending head, from below and only from one side.
  • a counter-holder is provided, which is mounted on a pivotable arm which is actuated by a working cylinder.
  • this counter-holder has both the function of a counter-holder and that of a tensioning element, so that special clamping devices are not required for the hollow profile strip to be bent.
  • the counter-holder can only be moved into or out of its a hollow profile strip against the guide, the active position by actuating the working cylinder in a part-circular arc-shaped movement path.
  • DE-OS 33 12 764 from which it is known to bend hollow profile strips to form spacers for insulating glass panes, a mandrel which can be placed against the hollow profile strip from the inside being provided in the region of the bending point.
  • the bending is carried out by pivoting a jaw, the other end of the profile strip being clamped between a movable clamping jaw and an abutment lying against the inside of the profile strip.
  • a problem with the known bending devices is that the sharp-edged bends required for use with insulating glass panes cannot always be achieved without problems, since there is a risk in part that the walls of the hollow profile strip tear during the bending process and the side surfaces of the hollow profile strips in the corner region, i.e. where they have been bent, do not always run flat, but have corrugations that complicate and hinder the subsequent processing of the spacer frame, in particular the coating of the side faces of the spacer frame with sealant or adhesive.
  • EP-A-318 748 describes a device for bending hollow profile strips to form spacer frames, the abutment of which is movably mounted and is intended to perform a pivoting and / or displacement movement during the bending process.
  • the pivoting movement of the abutment follows the movement of the bending lever which acts on the hollow profile to be bent from the outside. This is intended to ensure that the inner wall of the hollow profile moves inward during the bending movement and finally rests against the outer wall which is likewise deformed inward by the pressure roller.
  • a control cam can be provided, which additionally moves the abutment in the direction of its longitudinal extension during its pivoting movement.
  • the device for bending hollow profile strips described in DE-OS 29 23 769 has a tool which can be advanced during the bending process, by means of which the web of a longitudinal section of a spacer strip at the highest point of the bend is to be deformed during the bending process.
  • the "counter bearing tool” is to be pushed into the highest point of the bend with the help of a wedge during the bending process.
  • the bending tool should simultaneously form the lateral guide for the side flanks of the U-shaped spacer strip, the distance of the guide surface for these sides flanking the counter-bearing tool being unchangeable, since this is made in one piece .
  • the invention has for its object to provide an improved bending device (bending head) with which the hollow profile strips can be bent at largely arbitrary, preselectable angles of the legs adjacent to the corner to each other.
  • the device according to the invention for bending hollow profile strips 1 consists of a clamp 2 with a stationary jaw 3 and a jaw 4 which is movable relative to this (the jaw 4 is not shown in FIG. 1).
  • the movable clamping jaw 4 can be displaced in the direction of the double arrow 7 (FIG. 2) via guide pins 5 and 6, which are each arranged in pairs, so that the mouth width of the clamp 2 can be adapted to the width of the hollow profile strip 1 to be bent.
  • a lever 8 pivotally supported on the stationary jaw 3 is provided.
  • the lever 8 is coupled to the movable jaw 4 via a pull rod 9, which is pivotally supported on the jaw 4 via a bearing 10.
  • the pivot lever 8 is driven by a linear motor, not shown, e.g. a double-acting pressure medium cylinder, operated.
  • the bending device also has an abutment 20 which is interchangeably inserted in a carrier 21.
  • a groove 23 is recessed in the carrier 21, into which the abutment 20 can be inserted with a sliding fit and is held there, for example, by a screw 24.
  • the support 21 for the abutment 20 is mounted on a lever 25, which is about a machine frame fixed bearing 26, i.e. a bearing that is not movable relative to the fixed jaw 3 of the clamp 2, by means of a linear motor 27, e.g. a double-acting pressure medium cylinder, can be pivoted in the direction of the double arrow 28 from the active position shown in solid lines in FIG. 1 into the ready position shown in dash-dotted lines in FIG. 1.
  • a linear motor 27 e.g. a double-acting pressure medium cylinder
  • the support 21 for the abutment 20, as shown in FIG. 2 is adjustable perpendicular to the plane of symmetry of the clamp 2, namely in the direction of the double arrow 29 shown in FIG. 2.
  • the carrier 21 is guided displaceably via guides 30 in a holder 31 connected to the lever 25.
  • a linear motor in the exemplary embodiment shown a double-acting pressure medium cylinder 32, is provided, the piston rod 33 of which is coupled to the carrier 21 via a pull rod 34.
  • the abutment 20 can not only be pivoted in a plane parallel to the plane of symmetry of the clamping jaw 2 (double arrow 28), but also in a direction perpendicular to the plane of symmetry of the clamp 2 (double arrow 29), so that the abutment 20 is entirely out of the Bending area can be moved out.
  • the abutment 20 carries at its front tip, which is formed by two inclined surfaces 36, which form an acute angle to the longitudinal extension of the flexible abutment 20, a bead-like extension 35, which like Fig. 4 shows the upper surface of the hollow profile 1, which is clamped in the clamp 2 between the jaws 3 and 4, before the beginning of the bending process, namely when the bending abutment 20 swings slightly in its active position.
  • the front end of the abutment 20 and the bead-shaped extension 35 adjoining the inclined surfaces 36 there are made somewhat narrower than the clear distance between the mutually facing surfaces of the clamping jaws 3 and 4 of the clamp 2 the side walls 40 of the hollow profile strip 1 to be bent are also supported from the inside during the bending process, as is indicated in the section of FIG. 5.
  • an angled stop surface 41 is provided on the abutment 20 in the region of its front end on one side, which cooperates with a step 42 on the fixed jaw 3.
  • the device for bending according to the invention also has a bending lever 50 with a bending attachment 52 which can be pivoted about an axis which coincides with the axis 37 of the bead 35 at the front end of the bending tool 20 when the abutment 20 is in its operative position (the surfaces 41 rest on the surfaces 42 of the jaw 3).
  • the pivoting range of the bending lever 50 is not limited to the 90 ° shown in Fig. 1, but also goes beyond, so that after pivoting (arrow 28) and lateral displacement (arrow 29) of the bending abutment 20 also acute angles between the two the corner 51 adjacent leg of the hollow profile bar 1 generated in the hollow profile bar 1 can be bent.
  • the clamp 2 For the bending of a hollow profile strip 1 to a corner, the clamp 2 is opened and the hollow profile strip 1 is placed on the upper guide pins 6 or pushed onto the guide pins 6 by a conveyor. After closing the clamp 2, the inner surfaces of the jaws 3 and 4 are then on the side surfaces 40 of the hollow profile strip 1, the abutment 20 is moved into its operative position shown in FIGS. 1 and 4 and bulges the upwardly facing wall of the Hollow profile strip 1 a little down. Then the part of the hollow profile strip 1 protruding from the clamp 2 is pivoted upwards by pivoting the bending lever 50, forming a corner 51. If the angle at the corner 51 is to be more acute, the abutment 20 is pivoted back and pulled back laterally, whereupon the bending is continued to the desired angle.
  • the bending lever 50 is then pivoted back, the clamping jaw is opened and the hollow profile bar 1 is pushed forward until the position of the hollow profile bar 1 in which a further corner is to be produced is correctly aligned with respect to the bending tool. Then, as described above, the next corner is bent. This continues until a spacer frame with the desired number of corners 51 - usually four - is finished.
  • the bending device according to the invention is preferably suitable for bending machines with an upwardly facing contact surface for the angled parts of the hollow profile strip 1 (e.g. DE-GM 87 05 796). Another advantage is that the abutment 20 in its ready position does not hinder the removal of the spacer frame, since it is arranged behind the abutment surface mentioned.
  • the invention also extends to an embodiment in which a freely rotatable roller 70 is provided at the free end of the abutment 80 instead of the bead-shaped extension 35.
  • the roller 70 has a width corresponding to the extension 35. This embodiment is shown in FIG. 7.
  • Both embodiments of the bending device according to the invention can also be used to produce arches 71 in hollow profile strips.
  • the hollow profile strip 1 is pushed forward by a feed device when the abutment 20 or 80 is pivoted in, the bending lever 50 being pivoted somewhat upward as shown in FIG. 7.
  • the radius of curvature of the arc 71 thus produced in the hollow profile strip depends on how far the bending lever 50 is pivoted upwards, i.e. how high the e.g. made of plastic with a low coefficient of friction bending 52 above the feed path (determined by the guide pins 6).

Abstract

An apparatus for bending hollow profile strips (1) into spacer frames for insulating glass planes includes a clamp for the hollow profile strip, which clamp can be brought into contact with the lateral surfaces of the hollow profile strip (1), an abutment (20), about which the hollow profile strip (1) is bent, and a pivotable bending lever (50). The abutment (20) is exchangeably attached to a support (21) and can be moved into and out of its operative position by pivoting the support (21) about an axis perpendicular to the plane of symmetry of the clamp (2) and by shifting the support (21) perpendicularly to the plane of symmetry of the clamp (2).

Description

Die Erfindung betrifft eine Vorrichtung zum Biegen von Hohlprofilleisten, insbesondere zum Biegen von Hohl profilleisten zu Abstandhalterrahmen für lsolierglasscheiben mit einer Klemme für die Hohlprofilleiste, die zwei zur Veränderung des gegenseitigen Abstandes relativ zueinander bewegliche Klemmbacken aufweist, die an die parallel zur Biegeebene verlaufenden Seitenflächen der zu biegenden Hohlprofilleiste anlegbar sind, mit einer zwischen den Klemmbacken angeordneten Auflage für die zu biegende Hohlprofilleiste, mit einem der Klemme zugeordneten Widerlager um das herumgebogen wird und das beim Biegevorgang gegen die später die Innenecke bildende Fläche der Hohlprofilleiste anliegt, und mit einem gegenüber der Klemme zum Ausführen des Biegevorganges verschwenkbarem Biegehebel, der an dem über die Klemme vorstehenden Abschnitt der Hohlprofilleiste anlegbar ist.The invention relates to a device for bending hollow profile strips, in particular for bending hollow profile strips to spacer frames for insulating glass panes with a clamp for the hollow profile strip, which has two mutually movable clamping jaws for changing the mutual distance, which to the parallel to the bending plane side surfaces of the Bending hollow profile strip can be created, with a support arranged between the clamping jaws for the hollow profile strip to be bent, with an abutment assigned to the clamp, around which is bent and which bears during the bending process against the surface of the hollow profile strip that later forms the inner corner, and with one opposite the clamp Execution of the bending process pivotable bending lever, which can be placed on the section of the hollow profile strip projecting above the clamp.

Derartige Biegevorrichtungen, die zum Teil möglichst scharfkantige Abbiegungen der Hohlprofilleisten ergeben sollen, sind in verschiedenen Ausführungsformen bekannt. Beispielsweise wird auf die DE-PS 32 23 881, das DE-GM 87 05 796 oder die US-PS 4 836 005 verwiesen.Bending devices of this type, some of which are intended to result in the sharpest possible bending of the hollow profile strips, are known in various embodiments. For example, reference is made to DE-PS 32 23 881, DE-GM 87 05 796 or US-PS 4 836 005.

Einstückig, mit abgebogenen Ecken hergestellte Abstandhalterrahmen sowie Vorrichtungen zur Herstellung derselben sind überdies aus der FR-PS 2 449 222 und der DE-OS 32 21 986 bekannt. Bei der aus der DE-OS 3 221 986 bekannten Vorrichtung ist eine Führung vorgesehen, auf der aufliegend die Hohlprofilleiste, die zu einem Abstandhalterrahmen zu biegen ist, wenigstens im Bereich des Biegekopfes von unten und nur von einer Seite her abgestützt geführt wird. Der Führung gegenüberliegend ist ein Gegenhalter vorgesehen, der an einem verschwenkbaren Arm, der von einem Arbeitszylinder betätigt wird, montiert ist. Dieser Gegenhalter hat bei der bekannten Vorrichtung sowohl die Funktion eines Gegenhalters, als auch die eines Spannelementes, so daß besondere Klemmvorrichtungen für die zu biegende Hohlprofilleiste nicht erforderlich sind.Spacer frames made in one piece, with bent corners and devices for producing the same are also known from FR-PS 2 449 222 and DE-OS 32 21 986. In the device known from DE-OS 3 221 986, a guide is provided, on which the hollow profile strip, which is to be bent to form a spacer frame, is supported, supported at least in the region of the bending head, from below and only from one side. Opposite the guide, a counter-holder is provided, which is mounted on a pivotable arm which is actuated by a working cylinder. In the known device, this counter-holder has both the function of a counter-holder and that of a tensioning element, so that special clamping devices are not required for the hollow profile strip to be bent.

Bei der bekannten Vorrichtung ist der Gegenhalter durch Betätigen des Arbeitszylinders lediglich in einer teilkreisbogenförmigen Bewegungsbahn in seine bzw. aus seiner eine Hohlprofilleiste gegen die Führung spannende Wirkstellung beweglich.In the known device, the counter-holder can only be moved into or out of its a hollow profile strip against the guide, the active position by actuating the working cylinder in a part-circular arc-shaped movement path.

Schließlich ist noch auf die DE-OS 33 12 764 zu verweisen, aus der es bekannt ist, Hohlprofilleisten zu Abstandhaltern für Isolierglasscheiben zu biegen, wobei im Bereich der Biegestelle ein von innen gegen die Hohlprofilleiste anlegbarer Dorn vorgesehen ist. Das Biegen erfolgt durch Verschwenken einer Backe, wobei das andere Ende der Profilleiste zwischen einer beweglichen Spannbacke und einem von der Innenseite der Profilleiste anliegenden Widerlager geklemmt wird.Finally, reference is made to DE-OS 33 12 764, from which it is known to bend hollow profile strips to form spacers for insulating glass panes, a mandrel which can be placed against the hollow profile strip from the inside being provided in the region of the bending point. The bending is carried out by pivoting a jaw, the other end of the profile strip being clamped between a movable clamping jaw and an abutment lying against the inside of the profile strip.

Ein Problem bei den bekannten Biegevorrichtungen ist es, daß die für die Verwendung bei Isolierglasscheiben geforderten scharfkantigen Abbiegungen nicht immer problemlos erreicht werden können, da zum Teil die Gefahr besteht, daß die Wände der Hohlprofilleiste beim Biegevorgang einreißen und die Seitenflächen der Hohlprofilleisten im Eckbereich, d.h. dort, wo sie gebogen worden sind, nicht immer plan verlaufen, sondern Wellungen aufweisen, welche die nachträgliche Verarbeitung des Abstandhalterrahmens, insbesondere die Beschichtung der Seitenflächen der Ab standhalterrahmen mit Dicht- bzw. Klebemasse erschweren und behindern.A problem with the known bending devices is that the sharp-edged bends required for use with insulating glass panes cannot always be achieved without problems, since there is a risk in part that the walls of the hollow profile strip tear during the bending process and the side surfaces of the hollow profile strips in the corner region, i.e. where they have been bent, do not always run flat, but have corrugations that complicate and hinder the subsequent processing of the spacer frame, in particular the coating of the side faces of the spacer frame with sealant or adhesive.

In der EP-A-318 748 ist eine Vorrichtung zum Biegen von Hohlprofilleisten zu Abstandhalterrahmen beschrieben, deren Widerlager beweglich montiert ist und während des Biegevorganges eine Schwenk- und/oder Verschiebebewegung ausführen soll. Dabei folgt die Schwenkbewegung des Widerlagers der Bewegung des Biegehebels, der am abzubiegenden Hohlprofil von außen her angreift. Dadurch soll erreicht werden, daß sich die Innenwand des Hohlprofils bei der Biegebewegung nach innen bewegt und schließlich an der ebenfalls von der Druckrolle nach innen verformten Außenwand anliegt. Hierzu kann gemäß Fig. 6 der EP-A- 318 748 eine Steuerkurve vorgesehen sein, die das Widerlager während seiner Schwenkbewegung zusätzlich in Richtung seiner Längserstreckung bewegt.EP-A-318 748 describes a device for bending hollow profile strips to form spacer frames, the abutment of which is movably mounted and is intended to perform a pivoting and / or displacement movement during the bending process. The pivoting movement of the abutment follows the movement of the bending lever which acts on the hollow profile to be bent from the outside. This is intended to ensure that the inner wall of the hollow profile moves inward during the bending movement and finally rests against the outer wall which is likewise deformed inward by the pressure roller. For this purpose, according to FIG. 6 of EP-A-318 748, a control cam can be provided, which additionally moves the abutment in the direction of its longitudinal extension during its pivoting movement.

Die in der DE-OS 29 23 769 beschriebene Vorrichtung zum Biegen von Hohlprofilleisten besitzt ein während des Biegevorganges vorschiebbares Werkzeug, durch das der Steg eines Längsabschnittes eines Abstandhalterstreifens auf der höchsten Stelle der Biegung während des Biegevor ganges verformt werden soll. In der DE-OS 29 23 769 ist ausdrücklich darauf hingewiesen, daß das "Gegenlagerwerkzeug" während des Biegevorganges mit Hilfe eines Keils in die höchste Stelle der Biegung geschoben werden soll. Bei der Vorrichtung gemäß der DE-OS 29 23 769 soll das Biege werkzeug gleichzeitig die seitliche Führung für die Sei tenflanken des U-förmigen Abstandhalterstreifens bilden, wobei der Abstand der Führungsfläche für diese Seiten flanken am Gegenlagerwerkzeug nicht veränderbar ist, da dieses einstückig ausgeführt ist.The device for bending hollow profile strips described in DE-OS 29 23 769 has a tool which can be advanced during the bending process, by means of which the web of a longitudinal section of a spacer strip at the highest point of the bend is to be deformed during the bending process. In DE-OS 29 23 769 it is expressly pointed out that the "counter bearing tool" is to be pushed into the highest point of the bend with the help of a wedge during the bending process. In the device according to DE-OS 29 23 769, the bending tool should simultaneously form the lateral guide for the side flanks of the U-shaped spacer strip, the distance of the guide surface for these sides flanking the counter-bearing tool being unchangeable, since this is made in one piece .

Überdies ist es bei den bekannten Biegevorrichtungen zwar möglich, zwischen den an die Ecke angrenzenden Schenkeln stumpfe Winkel herzustellen, doch sind spitze Winkel nur schwer erreichbar.Moreover, with the known bending devices it is possible to produce obtuse angles between the legs adjoining the corner, but acute angles are difficult to reach.

Der Erfindung liegt die Aufgabe zugrunde, eine verbesserte Biegevorrichtung (Biegekopf) zur Verfügung zu stellen, mit dem Hohlprofilleisten unter weitgehend be liebigen, vorwählbaren Winkeln der an die Ecke angrenzenden Schenkel zueinander gebogen werden können.The invention has for its object to provide an improved bending device (bending head) with which the hollow profile strips can be bent at largely arbitrary, preselectable angles of the legs adjacent to the corner to each other.

Gelöst wird diese Aufgabe gemäß der Erfindung bei einer Vorrichtung der eingangs genannten Gattung dadurch, daß das Widerlager an einem Träger gehalten ist, der sowohl in oder parallel zur Symmetrieebene der Klemme als auch senkrecht zu dieser Symmetrieebene zum Wegbewegen des Widerlagers aus der Biegeebene verstellbar ist. Vorteilhafte Ausführungsformen der erfindungsgemäßen Vorrichtung sind Gegenstand der Unteransprüche.This object is achieved according to the invention in a device of the aforementioned gat tion in that the abutment is held on a support which is adjustable both in or parallel to the plane of symmetry of the clamp and perpendicular to this plane of symmetry for moving the abutment away from the bending plane. Advantageous embodiments of the device according to the invention are the subject of the dependent claims.

Vorteile, Merkmale und Einzelheiten von Ausführungsbeispielen der Erfindung ergeben sich aus der nachstehenden Beschreibung, in der auf die angeschlossenen Zeichnungen Bezug genommen wird. Es zeigen:

  • Fig. 1 einen Biegekopf in Seitenansicht,
  • Fig. 2 einen Biegekopf von links der Fig. 1 aus gesehen,
  • Fig. 3 eine Draufsicht auf den Biegekopf,
  • Fig. 4 eine Einzelheit des Biegekopfes im Bereich des Biegewiderlagers,
  • Fig. 5 einen Schnitt längs der Linie V-V in Fig. 4,
  • Fig. 6 eine vergrößerte Einzelheit im Bereich des Widerlagers und
  • Fig. 7 eine Ausführungsform mit einem mit einer Rolle bestückten Biegewiderlager.
Advantages, features and details of exemplary embodiments of the invention result from the following description, in which reference is made to the attached drawings. Show it:
  • 1 is a bending head in side view,
  • 2 seen a bending head from the left of FIG. 1,
  • 3 is a plan view of the bending head,
  • 4 shows a detail of the bending head in the area of the bending abutment,
  • 5 shows a section along the line VV in FIG. 4,
  • Fig. 6 is an enlarged detail in the area of the abutment and
  • Fig. 7 shows an embodiment with a bending abutment equipped with a roller.

Die erfindungsgemäße Vorrichtung zum Biegen von Hohlprofilleisten 1 besteht aus einer Klemme 2 mit einer ortsfesten Klemmbacke 3 und einer gegenüber dieser beweglichen Klemmbacke 4 (in Fig. 1 ist die Klemmbacke 4 nicht gezeigt). Die bewegliche Klemmbacke 4 ist über Führungsstifte 5 und 6, die jeweils paarweise angeordnet sind, in Richtung des Doppelpfeils 7 (Fig. 2) verschiebbar, so daß die Maulweite der Klemme 2 an die Breite der zu biegenden Hohlprofilleiste 1 angepaßt werden kann.The device according to the invention for bending hollow profile strips 1 consists of a clamp 2 with a stationary jaw 3 and a jaw 4 which is movable relative to this (the jaw 4 is not shown in FIG. 1). The movable clamping jaw 4 can be displaced in the direction of the double arrow 7 (FIG. 2) via guide pins 5 and 6, which are each arranged in pairs, so that the mouth width of the clamp 2 can be adapted to the width of the hollow profile strip 1 to be bent.

Zur Betätigung der beweglichen Klemmbacke 4 in Richtung des Pfeiles 7 (Fig. 2) ist ein an der feststehenden Klemmbacke 3 verschwenkbar abgestützter Hebel 8 vorgesehen. Der Hebel 8 ist über eine Zugstange 9, die über ein Lager 10 an der Klemmbacke 4 schwenkbeweglich abgestützt ist, mit der beweglichen Klemmbacke 4 gekuppelt. Der Schwenkhebel 8 wird durch einen nicht gezeigten Linearmotor, z.B. einen doppeltwirkenden Druckmittelzylinder, betätigt.To actuate the movable jaw 4 in the direction of arrow 7 (FIG. 2), a lever 8 pivotally supported on the stationary jaw 3 is provided. The lever 8 is coupled to the movable jaw 4 via a pull rod 9, which is pivotally supported on the jaw 4 via a bearing 10. The pivot lever 8 is driven by a linear motor, not shown, e.g. a double-acting pressure medium cylinder, operated.

Die Biegevorrichtung besitzt weiters ein Widerlager 20, das auswechselbar in einen Träger 21 eingesetzt ist. Hiezu ist im Träger 21 eine Nut 23 ausgespart, in die das Widerlager 20 mit Gleitsitz einsetzbar ist und dort beispielsweise durch eine Schraube 24 gehalten wird.The bending device also has an abutment 20 which is interchangeably inserted in a carrier 21. For this purpose, a groove 23 is recessed in the carrier 21, into which the abutment 20 can be inserted with a sliding fit and is held there, for example, by a screw 24.

Der Träger 21 für das Widerlager 20 ist an einem Hebel 25 montiert, der um ein maschinengestellfestes Lager26, d.h. ein Lager, das gegenüberderortsfesten Klemmbacke 3 der Klemme 2 nicht beweglich ist, mit Hilfe eines Linearmotors 27, z.B. einem doppelt wirkenden Druckmittelzylinder, in Richtung des Doppelpfeiles 28 aus der in Fig. 1 mit durchgehenden Linien dargestellten Wirkstellung in die in Fig. 1 strichpunktiert eingezeichnete Bereitschaftsstellung verschwenkbar ist.The support 21 for the abutment 20 is mounted on a lever 25, which is about a machine frame fixed bearing 26, i.e. a bearing that is not movable relative to the fixed jaw 3 of the clamp 2, by means of a linear motor 27, e.g. a double-acting pressure medium cylinder, can be pivoted in the direction of the double arrow 28 from the active position shown in solid lines in FIG. 1 into the ready position shown in dash-dotted lines in FIG. 1.

Zusätzlich ist der Träger 21 für das Widerlager 20, wie dies Fig. 2 zeigt, zur Symmetrieebene der Klemme 2 senkrecht, nämlich in Richtung des in Fig. 2 eingezeichneten Doppelpfeiles 29 verstellbar. Hiezu ist der Träger 21 über Führungen 30 in einer mit dem Hebel 25 verbundenen Halterung 31 verschiebbar geführt. Zur Verstellung des Trägers 21 und damit des Widerlagers 20 in Richtung des Doppelpfeiles 29 ist ein Linearmotor, im gezeigten Ausführungsbeispiel ein doppelt wirkender Druckmittelzylinder 32, vorgesehen, dessen Kolbenstange 33 über eine Zugstange 34 mit dem Träger 21 gekuppelt ist.In addition, the support 21 for the abutment 20, as shown in FIG. 2, is adjustable perpendicular to the plane of symmetry of the clamp 2, namely in the direction of the double arrow 29 shown in FIG. 2. For this purpose, the carrier 21 is guided displaceably via guides 30 in a holder 31 connected to the lever 25. To adjust the carrier 21 and thus the abutment 20 in the direction of the double arrow 29, a linear motor, in the exemplary embodiment shown a double-acting pressure medium cylinder 32, is provided, the piston rod 33 of which is coupled to the carrier 21 via a pull rod 34.

Auf diese Weise kann das Widerlager 20 nicht nur in einer zur Symmetrieebene der Klemmbacke 2 parallelen Ebene verschwenkt (Doppelpfeil 28), sondern auch in einer zur Symmetrieebene der Klemme 2 senkrechten Richtung (Doppelpfeil 29) verstelltwerden, so daß das Widerlager 20 zur Gänze aus dem Biegebereich herausbewegt werden kann.In this way, the abutment 20 can not only be pivoted in a plane parallel to the plane of symmetry of the clamping jaw 2 (double arrow 28), but also in a direction perpendicular to the plane of symmetry of the clamp 2 (double arrow 29), so that the abutment 20 is entirely out of the Bending area can be moved out.

Wie die Fig. 1 und 2 und insbesondere Fig. 4 zeigen, trägt das Widerlager 20 an seiner vorderen Spitze, die von zwei Schrägflächen 36, die zur Längserstreckung des Biegewiderlagers 20 einen spitzen Winkel einschließen, gebildet wird, einen wulstartigen Ansatz 35, der wie Fig. 4 zeigt, die obere Fläche des Hohlprofils 1, das in der Klemme 2 zwischen den Klemmbacken 3 und 4 geklemmt ist, noch vor dem Beginn des Biegevorganges, nämlich beim Einschwenken des Biegewiderlagers 20 in seine Wirkstellung etwas einwölbt.1 and 2 and in particular Fig. 4, the abutment 20 carries at its front tip, which is formed by two inclined surfaces 36, which form an acute angle to the longitudinal extension of the flexible abutment 20, a bead-like extension 35, which like Fig. 4 shows the upper surface of the hollow profile 1, which is clamped in the clamp 2 between the jaws 3 and 4, before the beginning of the bending process, namely when the bending abutment 20 swings slightly in its active position.

Zusätzlich ist bei dererfindungsgemäßen Biegevorrichtung vorgesehen, daß das vordere Ende des Widerlagers 20 und der dort an die Schrägfächen 36 anschließende, wulstförmige Ansatz 35 etwas schmäler ausgebildet sind als der lichte Abstand zwischen den einander zugekehrten Flächen der Klemmbacken 3 und 4 der Klemme 2. So werden die Seitenwände 40 der zu biegenden Hohlprofilleiste 1 während des Biegevorganges auch von innen her abgestützt, wie dies im Schnitt von Fig. 5 angedeutet ist. Dies ist insbesondere beim Biegen von Hohlprofilleisten 1 zu Abstandhalterrahmen für Isolierglasscheiben von Bedeutung, da die Breite der Seitenflächen 40 der Hohlprofilleiste 1 auch im Eckbereich möglichst nicht verkleinert werden soll und diese Seitenflächen 40 im Eckbereich nicht aus der von den Seitenflächen 40 definierten Ebenen nach innen abweichen sollen, damit das vor dem Zusammenbau der Isolierglasscheiben auf die Abstandhalterrahmen auf ihre Seitenflächen 40 aufzubringende Klebe- und Dichtmaterial auch im Eckbereich, der für die Dichtheit von Isolierglasscheiben von erheblicher Bedeutung ist, in der vollen Breite aufgebracht werden kann.In addition, it is provided in the bending device according to the invention that the front end of the abutment 20 and the bead-shaped extension 35 adjoining the inclined surfaces 36 there are made somewhat narrower than the clear distance between the mutually facing surfaces of the clamping jaws 3 and 4 of the clamp 2 the side walls 40 of the hollow profile strip 1 to be bent are also supported from the inside during the bending process, as is indicated in the section of FIG. 5. This is particularly important when bending hollow profile strips 1 to form spacer frames for insulating glass panes, since the width of the side surfaces 40 of the hollow profile strip 1 should also not be reduced as much as possible in the corner region and these side surfaces 40 in the corner region should not deviate inward from the planes defined by the side surfaces 40 So that the adhesive and sealing material to be applied to the spacer frames on their side surfaces 40 before the assembly of the insulating glass panes can also be applied in the full width in the corner area, which is of considerable importance for the tightness of insulating glass panes.

Um das Widerlager 20, insbesondere dessen wulstförmigen Ansatz 35, gegenüber der Klemmbacke 2 und damit gegenüber der Achse 37, um welche die Hohlprofilleiste 1 gebogen wird, richtig auszurichten, ist am Widerlager 20 im Bereich seines vorderen Endes auf einer Seite eine gewinkelte Anschlagfläche 41 vorgesehen, die mit einer Stufe 42 an der feststehenden Klemmbacke 3 zusammenwirkt. Wenn die Anschlagfläche 41 an der Stufe 42 der Klemmbacke 3 anliegt, ist die Achse 37 des am vorderen Ende des Biegewiderlagers 20 vorgesehenen, wulstförmigen Ansatzes 35 richtig ausgerichtet.In order to properly remove the abutment 20, in particular its bead-shaped extension 35, with respect to the clamping jaw 2 and thus with respect to the axis 37 about which the hollow profile strip 1 is bent align, an angled stop surface 41 is provided on the abutment 20 in the region of its front end on one side, which cooperates with a step 42 on the fixed jaw 3. When the stop surface 41 abuts the step 42 of the clamping jaw 3, the axis 37 of the bead-shaped extension 35 provided at the front end of the bending abutment 20 is correctly aligned.

Die erfindungsgemäße Vorrichtung zum Biegen besitzt noch einen Biegehebel 50 mit einem Biegeansatz 52, der um eine Achse verschwenkbar ist, die mit der Achse 37 des Wulstes 35 am vorderen Ende des Biegewerkzeuges 20 zusammenfällt, wenn das Widerlager 20 in seiner Wirkstellung ist (die Flächen 41 liegen an den Flächen 42 der Klemmbacke 3 an). Der Verschwenkbereich des Biegehebels 50 ist nicht auf die in Fig. 1 gezeigten 90° beschränkt, sondern geht auch darüber hinaus, so daß nach dem Ausschwenken (Pfeil 28) und seitlichen Verschieben (Pfeil 29) des Biegewiderlagers 20 auch spitze Winkel zwischen den beiden an die in der Hohlprofilleiste 1 erzeugte Ecke 51 angrenzenden Schenkel der Hohlprofilleiste 1 gebogen werden können.The device for bending according to the invention also has a bending lever 50 with a bending attachment 52 which can be pivoted about an axis which coincides with the axis 37 of the bead 35 at the front end of the bending tool 20 when the abutment 20 is in its operative position (the surfaces 41 rest on the surfaces 42 of the jaw 3). The pivoting range of the bending lever 50 is not limited to the 90 ° shown in Fig. 1, but also goes beyond, so that after pivoting (arrow 28) and lateral displacement (arrow 29) of the bending abutment 20 also acute angles between the two the corner 51 adjacent leg of the hollow profile bar 1 generated in the hollow profile bar 1 can be bent.

Für das Abbiegen einer Hohlprofilleiste 1 zu einer Ecke wird die Klemme 2 geöffnet und die Hohlprofilleiste 1 auf die oberen Führungsstifte 6 aufgelegt oder von einer Fördereinrichtung auf die Führungsstifte 6 geschoben. Nach dem Schließen der Klemme 2, die Innenflächen der Klemmbacken 3 und 4 liegen dann an den Seitenflächen 40 der Hohlprofilleiste 1 an, wird das Widerlager 20 in seine in den Fig. 1 und 4 gezeigte Wirkstellung bewegt und wölbt dabei die nach oben weisende Wand der Hohlprofilleiste 1 etwas nach unten ein. Hierauf wird der aus der Klemme 2 ragende Teil der Hohlprofilleiste 1 durch Verschwenken des Biegehebels 50 unterAusbilden einer Ecke 51 nach oben verschwenkt. Soll der Winkel an der Ecke 51 ein spitzer sein, so wird das Widerlager 20 zurückgeschwenkt und seitlich zurückgezogen, worauf das Biegen bis zum gewünschten Winkel fortgesetzt wird.For the bending of a hollow profile strip 1 to a corner, the clamp 2 is opened and the hollow profile strip 1 is placed on the upper guide pins 6 or pushed onto the guide pins 6 by a conveyor. After closing the clamp 2, the inner surfaces of the jaws 3 and 4 are then on the side surfaces 40 of the hollow profile strip 1, the abutment 20 is moved into its operative position shown in FIGS. 1 and 4 and bulges the upwardly facing wall of the Hollow profile strip 1 a little down. Then the part of the hollow profile strip 1 protruding from the clamp 2 is pivoted upwards by pivoting the bending lever 50, forming a corner 51. If the angle at the corner 51 is to be more acute, the abutment 20 is pivoted back and pulled back laterally, whereupon the bending is continued to the desired angle.

Hierauf wird der Biegehebel 50 zurückgeschwenkt, die Klemmbacke geöffnet und die Hohlprofilleiste 1 vorgeschoben, bis die Stelle der Hohlprofilleiste 1, in der eine weitere Ecke herzustellen ist, gegenüber dem Biegewerkzeug richtig ausgerichtet ist. Dann wird, wie oben beschrieben, die nächste Ecke gebogen. Dies wird fortgesetzt, bis ein Abstandhalterrahmen mit der gewünschten Anzahl der Ecken 51 - meist sind es vier - fertig gebogen ist.The bending lever 50 is then pivoted back, the clamping jaw is opened and the hollow profile bar 1 is pushed forward until the position of the hollow profile bar 1 in which a further corner is to be produced is correctly aligned with respect to the bending tool. Then, as described above, the next corner is bent. This continues until a spacer frame with the desired number of corners 51 - usually four - is finished.

Die erfindungsgemäße Biegevorrichtung ist bevorzugtfür Biegemaschinen mit nach oben weisender Anlagefläche für die abgewinkelten Teile der Hohlprofilleiste 1 geeignet (z.B. DE-GM 87 05 796). Dabei besteht ein weiterer Vorteil darin, daß das Widerlager 20 in seiner Bereitschaftsstellung den Abtransport des Abstandhalterrahmens nicht behindert, da es in dieser hinter der erwähnten Anlagefläche angeordnet ist.The bending device according to the invention is preferably suitable for bending machines with an upwardly facing contact surface for the angled parts of the hollow profile strip 1 (e.g. DE-GM 87 05 796). Another advantage is that the abutment 20 in its ready position does not hinder the removal of the spacer frame, since it is arranged behind the abutment surface mentioned.

Die Erfindung erstreckt sich auch auf eine Ausführungsform, bei welcher am freien Ende des Widerlagers 80 an Stelle des wulstförmigen Ansatzes 35 eine frei drehbare Rolle 70 vorgesehen ist. Die Rolle 70 besitzt eine dem Ansatz 35 entsprechende Breite. Diese Ausführungsform ist in Fig. 7 gezeigt.The invention also extends to an embodiment in which a freely rotatable roller 70 is provided at the free end of the abutment 80 instead of the bead-shaped extension 35. The roller 70 has a width corresponding to the extension 35. This embodiment is shown in FIG. 7.

Beide Ausführungsformen der erfindungsgemäßen Biegevorrichtung können auch zum Herstellen von Bögen 71 in Hohlprofilleisten verwendet werden. Hiezu wird die Hohlprofilleiste 1 bei eingeschwenktem Widerlager 20 bzw. 80 von einer Vorschubeinrichtung vorgeschoben, wobei der Biegehebel 50 wie in Fig. 7 gezeigt, etwas nach oben verschwenkt ist. Der Krümmungsradius des so hergestellten Bogens 71 in der Hohlprofilleiste hängt davon ab, wie weit der Biegehebel 50 nach oben verschwenkt ist, d.h. davon, wie hoch der z.B. aus Kunststoff mit geringem Reibungskoeffizienten bestehende Biegeansatz 52 über der Zuführbahn (bestimmt von den Führungsstiften 6) steht.Both embodiments of the bending device according to the invention can also be used to produce arches 71 in hollow profile strips. For this purpose, the hollow profile strip 1 is pushed forward by a feed device when the abutment 20 or 80 is pivoted in, the bending lever 50 being pivoted somewhat upward as shown in FIG. 7. The radius of curvature of the arc 71 thus produced in the hollow profile strip depends on how far the bending lever 50 is pivoted upwards, i.e. how high the e.g. made of plastic with a low coefficient of friction bending 52 above the feed path (determined by the guide pins 6).

Claims (15)

1. Device for bending hollow profiled bars (1), more particularly for bending hollow profiled bars (1) to form spacer frames for insulated glass panels, with a clamp (2) for the hollow profiled bar (1) having two clamp jaws (3, 4) which are movable relative to one another in order to alter the mutual distance apart, said jaws being capable of being applied against the lateral faces (40), which extend parallel to the plane of bending, of the hollow profiled bar (1) to be bent, with a support surface (6), disposed between the clamp jaws (3, 4), for the hollow profiled bar (1) to be bent, with a countersupport (20,80) associated with the clamp (2), around which bending takes place, and which during the bending procedure abuts against the face of the hollow profiled bar (1) later to form the internal corner, and with a bending lever(50), pivotal relative to the clamp (2) in order to carry out the bending procedure, and which can be applied against the portion of the hollow profiled bar (1) projecting beyond the clamp (2), characterised in that the countersupport (20, 80) is secured on a carrier (21), which is displaceable both in or parallel to the plane of symmetry of the clamp (2) and also perpendicularly to this plane of symmetry, in order to move the countersupport (20, 80) out of the bending plane.
2. Device according to claim 1, characterised in that the carrier (21) for the countersupport (20, 80) is pivotal about an axis (bearing 26) perpendicular to the plane of symmetry of the clamp (2).
3. Device according to claim 1 or 2, characterised in that the carrier (21) for the countersupport (20, 80) is displaceably guided in a holder (31) perpendicularly to the plane of symmetry of the clamp (2).
4. Device according to one of claims 1 to 3, characterised in that the carrier (21) for the countersupport (20, 80) is mounted on a lever (25), which is mounted on the device to pivot about an axis perpendicular to the plane of symmetry of the clamp (2).
5. Device according to one of claims 1 to 4, characterised in that the carrier (21) for the countersupport (20, 80) is displaceably guided in a holder (31) secured to the lever (25) via preferably at least two guide pins (30) or track rods perpendicularly to the plane of symmetry of the clamp (2).
6. Device according to one of claims 1 to 5, characterised in that the countersupport (20, 80) is secured on its carrier (21) so as to be replaceable.
7. Device according to claim 6, characterised in that the countersupport (20, 80) on the carrier (21) is inserted with a sliding fit into a groove (23) provided on the carrier (21), and secured by means of an attachment means, e.g. a screw (24).
8. Device according to one of claims 1 to 7, characterised in that one of the clamp jaws (3) of the clamp (2) is secured stationarily on the framework of the device, and in that the second clamp jaw (4) is displaceably guided with respect to the stationary clamp jaw (3).
9. Device according to one of claims 1 to 8, characterised in that, in order to guide the movable clamp jaw (4) relative to the stationary clamp jaw (3), track rods (5, 6) are provided, aligned perpendicularly to the plane of symmetry of the clamp (2), which engage with a sliding fit in bores in one of the clamp jaws (3, 4), and in that track rods (6) simultaneously form a support surface for the hollow profiled strip to be bent.
10. Device according to claim 9, characterised in that the movable clamp jaw (4) is coupled through a lever (8)-connecting rod (9)-drive to a linear motor, e.g. a hydraulic cylinder.
11. Device according to one of claims 1 to 10, characterised in that one of the clamp jaws (3, 4) of the clamp (2), preferably the stationary damp jaw (3), has on its side facing the countersupport (20, 80) a step (42), and in that the countersupport (20, 80) has a countersurface (41), preferably an angled surface, which engages in the step (42) when the countersupport (20) is in the operative position.
12. Device according to one of claims 1 to 11, characterised in that the countersupport (20) has on its free end a bead-like thickened portion (35), which is narrower than the hollow profiled strip (1) to be bent.
13. Device according to one of claims 1 to 11, characterised in that there is mounted at the free end of the countersupport (80) a roller (70), which is freely rotatable about an axis parallel to the pivotal axis (37) of the bending lever (50).
14. Device according to claim 12 or 13, characterised in that the bending lever (50) is pivotal about an axis (37) perpendicular to the plane of symmetry of the clamp (2), said axis (37) being coaxial with the axis of the bead (35) or with the axis of rotation of the roller (70) at the forward end of the countersupport (20, 80), when the countersupport (20, 80) is in its operative position.
15. Device according to one of claims 1 to 14, characterised in that the pivotal axis (bearing 26) of the lever (25) carrying the carrier (21) for the countersupport (20, 80) is offset relative to the pivotal axis (37) for the bending lever (50).
EP91890098A 1990-05-21 1991-05-07 Apparatus for bending hollow spaces frames Expired - Lifetime EP0462961B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT112690A AT397054B (en) 1990-05-21 1990-05-21 DEVICE FOR BENDING HOLLOW PROFILE STRIPS
AT1126/90 1990-05-21
AT184090A AT397775B (en) 1990-09-10 1990-09-10 Bending device for holder profile rails - incorporates displaceable grab for rails
AT1840/90 1990-09-10

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EP0462961A1 EP0462961A1 (en) 1991-12-27
EP0462961B1 true EP0462961B1 (en) 1994-03-09
EP0462961B2 EP0462961B2 (en) 1998-09-09

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EP (1) EP0462961B2 (en)
JP (1) JPH0768323A (en)
AT (1) ATE102514T1 (en)
DE (2) DE59101140D1 (en)
DK (1) DK0462961T3 (en)
ES (1) ES2051109T3 (en)
IT (2) IT221862Z2 (en)
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NO911926D0 (en) 1991-05-16
US5117669A (en) 1992-06-02
IT221861Z2 (en) 1994-12-06
NO911926L (en) 1991-11-22
IT221862Z2 (en) 1994-12-06
JPH0768323A (en) 1995-03-14
ITMI910429U1 (en) 1992-11-20
ITMI910430U1 (en) 1992-11-20
ES2051109T3 (en) 1994-06-01
DE59101140D1 (en) 1994-04-14
NO179684B (en) 1996-08-19
ITMI910429V0 (en) 1991-05-20
DK0462961T3 (en) 1994-04-05
DE4116268A1 (en) 1991-12-12
DE4116268C2 (en) 1993-02-18
NO179684C (en) 1996-11-27
ITMI910430V0 (en) 1991-05-20
EP0462961B2 (en) 1998-09-09
ATE102514T1 (en) 1994-03-15
EP0462961A1 (en) 1991-12-27

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