EP2210680B1 - Bending press with a drive beam and elastically coupled bending beam - Google Patents
Bending press with a drive beam and elastically coupled bending beam Download PDFInfo
- Publication number
- EP2210680B1 EP2210680B1 EP10000736.8A EP10000736A EP2210680B1 EP 2210680 B1 EP2210680 B1 EP 2210680B1 EP 10000736 A EP10000736 A EP 10000736A EP 2210680 B1 EP2210680 B1 EP 2210680B1
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- Prior art keywords
- bending
- press
- driving
- contact surface
- length
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- 238000005452 bending Methods 0.000 title claims description 125
- 230000008878 coupling Effects 0.000 claims description 20
- 238000010168 coupling process Methods 0.000 claims description 20
- 238000005859 coupling reaction Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 3
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims 1
- 238000007654 immersion Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Images
Classifications
-
- 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
- B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/06—Platens or press rams
- B30B15/068—Drive connections, e.g. pivotal
Definitions
- the invention relates to a bending press as described in the preamble of claim 1 and a method as described in the preamble of claim 14.
- a press with a vertically movable upper cheek relative to a fixed lower cheek is known.
- the upper beam is divided approximately in two perpendicular to a direction of force action, the two cheek parts meet in the center of the cheek and are separated from one another on both sides of the joint by a gap with a gap width that increases continuously up to the cheek ends.
- This division of the upper beam makes it possible to achieve that the upper beam and the lower beam bend in the same direction under load at the work site and the deflection lines run at least approximately parallel.
- the two cheek parts of the upper cheek are preferably connected to one another by coupling members at their outer end regions, these coupling members being connected to the cheek parts via hinge axes and having spring elements, whereby a stable, neutral position is ensured in the unloaded state of the cheek part receiving the bending tool.
- Each of the two press beams comprises two outer beams arranged in parallel at a distance from one another and one inner beam each arranged between them.
- the opposing inner bars form support surfaces for bending tools on opposite end faces.
- These inner bars, which can be equipped with the tools, are each movable with respect to the outer bar and are coupled via resilient coupling elements, whereby a basic positioning of the bars of the bar structure is achieved.
- a relative movement of the inner beam parts with respect to the respective outer beam parts is made possible as a function of a load applied by the pressing forces.
- the deflection of the beams that occurs under load can be coordinated with one another and thus the immersion depth of the interacting bending tools required for an exact bending angle is kept constant over the entirety of the bending length.
- the object of the invention is to create a press with a two-part press beam with which the force required for a bending process can be brought into alignment with a line of action of a reaction force acting on the press beam, depending on the positioning of the tools in the longitudinal direction of the press beam.
- This object of the invention is achieved by the features recited in the characterizing part of claim 1.
- the surprising advantage here is that during the forming process, deviations in the penetration depth of the bending tools in relation to the bending length, caused by bending of the press and table beams depending on the position of the tools, are compensated for by correcting the position of the part of the press beam that acts as a bending beam and so that a high angular accuracy is achieved on the workpiece.
- an embodiment according to claim 2 is also advantageous, because it results in a change in the position of the drive beam relative to the bending beam by selecting appropriate adjustment paths for the drive means.
- the drive bar and the bending bar have mutually facing contact surfaces extending over a length of the drive bar, a direct force transmission between the drive bar and the bending bar is achieved.
- designs according to claims 3 to 5 are also advantageous because, depending on the relative position of the drive beam, the position of the force introduction into the bending beam is variable over its length to adapt to a planned position of the bending tools.
- An embodiment according to claim 6 is possible, as a result of which the required pivotability for adapting the position of the force transmission between the drive beam and the bending beam to the intended position of the bending tools is reduced.
- an embodiment according to claim 10 is also advantageous because it also saves components and a preload for play-free contact of the contact surfaces of the drive beam and the bending beam is achieved.
- the object of the invention is also achieved by a method according to the measures according to claim 14.
- the advantage is that an approximately symmetrical deflection under load of the table beam and the bending beam is achieved whereby angular errors on the work part are largely avoided and readjustments of the adjustment paths of the drive means are not necessary in many cases.
- measures as described in claim 15 are also advantageous, because by shifting the line of action of the deformation force and thus a force introduction point on the bending beam, the deformation effect during a correction deformation stroke from a central position, based on the bending length, into an eccentric, a post-forming of the workpiece is adjusted in particular the area to be subjected to and thus the forming quality is increased.
- All information on value ranges in the present description should be understood to include any and all sub-areas, e.g. the information 1 to 10 should be understood to include all sub-areas, starting from the lower limit 1 and the upper limit 10 , ie all subranges begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, for example 1 to 1.7, or 3.2 to 8.1 or 5.5 to 10.
- a bending press 1 in particular a press brake 2, for producing work parts 3, between bending tools 4 that are adjustable relative to one another, is shown.
- a machine frame 5 of the bending press 1 consists, for example, of a base plate 6 on which side walls 7, 8 are arranged, projecting vertically, spaced from one another and aligned parallel to one another. These are preferably connected by a massive cross bracing 9, formed for example from a sheet metal part, at their end regions spaced from the base plate 6.
- the side cheeks 7, 8 are approximately C-shaped to form a free space for the reshaping of the workpiece 3, a fixed table beam 12 standing on the base plate 6 being attached to the front end surfaces 10 of legs 11 of the side cheeks 7, 8 close to the floor.
- Linear guide arrangements 15 for a press beam 16 which can be adjusted relative to the table beam 12 are provided on legs 14 of the side cheeks 7, 8 that are remote from the base plate 6.
- the press beam 16 can be adjusted via two drive means 17, 18 of the drive arrangement 19, which are spaced apart from one another, according to double arrow 20.
- the reshaping and forming of the workpiece 3 is carried out between the bending tools 4 arranged on opposite support surfaces 21, 22 of the press beam 16 and the table beam 12 during an adjustment stroke of the press beam 16.
- the drive arrangement 19 is a hydraulic drive with hydraulic cylinders 23 acted on from both sides as the drive means 17, 18, with piston rods 24 being connected to the press beam 16 via spherical cap bearings 25 with the press beam 16, whereby a pivoting movement of the press beam 15 in a restricted area , by different adjustment paths of the drive means 17, 18, in one to one Front surface of the press beam 16 parallel plane is made possible and thus an immersion depth of the bending tools 4 can be influenced.
- the hydraulic cylinders 23 are fastened to the cross bracing 9 with housings 26.
- the housings 26 are fastened directly to the side walls 7, 8.
- the press beam 16 is designed in two parts and consists of a drive beam 27 which is drive-connected to the piston rods 24 via the spherical cap bearings 25.
- the drive bar 27 protrudes into a slot-shaped receptacle 29, which extends over an entire length 28 of the press bar 16, of a bending bar 30 equipped with the bending tool 4, which is adjustably mounted in the linear guide arrangements 15 for vertical adjustment, whereby an adjustment of the bending tools 4 receiving support surfaces 21, 22 of the table beam 12 and of the bending beam 30 in planes 31, 32 aligned parallel to one another.
- the drive beam 27 and the bending beam 30 have in the slot-shaped receptacle 29 facing contact surfaces 33, 34, the contact surface 33 of the drive beam 27 extending in an arcuate manner in the direction of the length 28, whereas the contact surface 34 of the bending beam 30 in the receptacle 29 is straight and runs in a plane 35 parallel to the plane 31 of the support surface 21 of the bending beam 30.
- Via an elastic coupling element 36 which is arranged approximately in the middle of the length 28 and connects the drive beam 27 to the bending beam 30 - which will be discussed in more detail later - a play-free contact between the contact surfaces 33, 34 of the drive beam 27 and the bending beam 30 is possible in FIG the slot-shaped receptacle 29 guaranteed.
- the coupling element 36 is formed by a spring assembly 37 in openings 38, 39 of the drive beam 27 and the bending beam 30, the spring force caused by the spring assembly 37 being greater than the dead weight of the bending beam 30 plus the occurring Acceleration forces that occur during an adjustment movement of the press beam 16 into an upper end position.
- the drive beam 27 protrudes into the slot-shaped receptacle 29 of the bending beam 30, the contact surface 34 extending in the plane 35 and the curved contact surface 33 of the drive beam 27 facing it touching one another in a linear manner.
- the opening 38 crossing this is arranged in a rectangular shape.
- the rectangular opening 39 is also arranged in the drive beam 27 and crossing it.
- a vertically measured distance 43 of the opening 38 is smaller than a distance 44 of the opening 39 in the drive beam 27, in relation to an apex 45 of the contact surface 33.
- the openings 38, 39 and extending over a thickness 46 of the bending beam 30, an upper and a lower pressure plate 47, 48 are arranged, which bring about the preload in the openings 38, 39 via the spiral compression spring 40 arranged between them and thus the play-free contact of the contact surfaces 33, 34 between the drive beam 27 and the bending beam 30 in the receptacle 29 is achieved.
- the bending press 1 is shown with the two-part press beam 16, consisting of the drive beam 27 frictionally coupled to the drive arrangement 19 and the bending beam 30 adjustable in the guide arrangements 15 - according to arrow 50 - and the method according to the invention is explained in the following description.
- the assembly of the bending press 1 with the bending tools 4 in the bending beam 30 and the table beam 12 shows an eccentric arrangement of the bending tools 4 as is often chosen when, for example, several sets of tools are used for different bending processes over the length 28 of the bending beam 30.
- Such assembly means different force application at the force introduction points, for example the spherical ball bearings 25 and an asymmetrical design of the deflection that occurs during the bending process on the bending beam 30 and table beam 12, with conventional bending presses with one-piece press beams then leading to bending inaccuracies because the depth of immersion of the Bending tools 4 turn out differently in the case of an eccentric arrangement and thus lead to inaccuracies in an adjustment path which is predetermined for a certain bending angle and which is measured and controlled.
- an inclined position of the drive beam 27, which connects the elastic coupling element 36 enables the line of force 49 to transfer the pressure force between the drive beam 27 and the bending beam 30 in the direction of the length 28 and thus for the forming process of the workpiece 3, due to the eccentricity of the assembly with the bending tools 4 occurring reaction force, according to - arrow 50 - in brought aligned agreement.
- the pivoting of the drive beam 27 takes place through different adjustments of the drive means, whereby, as shown, the pin bearings 25 assume a correspondingly different position and a pivoted position of the drive beam 27 is achieved.
- the maximum inclination of the drive beam 27 from its horizontal neutral position is once a segment height 51 of the curved contact surface 33, the segment height 51 being selected as a function of the respective length 28 of the drive beam 27.
- segment height 51 being selected as a function of the respective length 28 of the drive beam 27.
- FIG. 5 an embodiment of the coupling element 36 between the drive beam 27 and the bending beam 30 is shown, which is formed from at least one pressure-elastic plastic pad 52, which ensures the play-free contact of the contact surfaces 33, 34, regardless of the position of the drive beam 27, as well as the relative movement between the drive beam 27 and the bending beam 30 during a pivoting movement of the drive beam 27.
- the bending press 1 according to the invention with the two-part press beam 16 enables, as already partially described previously, the force introduction point on the bending beam 30 by pivoting the drive beam 27 by means of appropriately preselected adjustment paths of the drive means 17, 18 in an aligned position with the force line 49 of the for a forming process on the Work part 3 to be applied force to bring.
- a data memory e.g. position of the tool sets or an assembly diagram of the bending press 1, with one or more bending stations from cooperating bending tools, the bending length, the work part data, the Geometry of the drive beam 27 etc.
- the forming process takes place by adjusting the drive beam 27 in the pivoted position by the same adjustment path of the drive means and thus the adjustment of the bending beam 30 takes place by the adjustment path required for a predetermined deformation, e.g. bending angle, to achieve a for the bending angle required immersion depth of the bending tools.
- a predetermined deformation e.g. bending angle
- the exemplary embodiments show possible design variants of the bending press 1, whereby it should be noted at this point that the invention is not limited to the specifically shown design variants of the same, but rather various combinations of the individual design variants with one another are possible and this possible variation is based on the teaching on technical action The present invention is within the ability of those skilled in this technical field. All conceivable design variants that are possible through combinations of individual details of the embodiment variants shown and described are therefore also included in the scope of protection of the appended claims.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Description
Die Erfindung betrifft eine Biegepresse wie sie im Oberbegriff des Anspruches 1 beschrieben ist sowie ein Verfahren wie es im Oberbegriff des Anspruches 14 beschrieben ist.The invention relates to a bending press as described in the preamble of
Aus dem Dokument
Aus dem Dokument
Aufgabe der Erfindung ist es, eine Presse mit einem zweigeteilten Pressenbalken zu schaffen, mit dem die für einen Biegeformvorgang erforderliche Kraftaufbringung in Abhängigkeit von der Positionierung der Werkzeuge in Längsrichtung des Pressenbalkens in fluchtender Ausrichtung zu einer Wirklinie einer auf den Pressenbalken einwirkenden Reaktionskraft gebracht werden kann.The object of the invention is to create a press with a two-part press beam with which the force required for a bending process can be brought into alignment with a line of action of a reaction force acting on the press beam, depending on the positioning of the tools in the longitudinal direction of the press beam.
Diese Aufgabe der Erfindung wird durch die im Kennzeichen des Anspruches 1 wiedergegebenen Merkmale erreicht. Der überraschende Vorteil dabei ist, dass dadurch während des Umformvorganges Abweichungen der Eindringtiefe der Biegewerkzeuge bezogen auf die Biegelänge, bedingt durch eine Durchbiegung des Pressen- und des Tischbalkens in Abhängigkeit der Position der Werkzeuge durch eine Lagekorrektur des als Biegebalken wirkenden Teils des Pressenbalkens ausgeglichen wird und damit eine hohe Winkelgenauigkeit am Werkteil erreicht wird.This object of the invention is achieved by the features recited in the characterizing part of
Von Vorteil ist aber auch eine Ausbildung nach Anspruch 2, weil dadurch eine Lageänderung des Antriebsbalkens relativ zum Biegebalken durch Wahl entsprechender Verstellwege der Antriebsmittel erreicht wird.However, an embodiment according to
Durch die vorteilhafte Ausbildung, wonach der Antriebsbalken und der Biegebalken einander zugewandte, sich über eine Länge des Antriebsbalken erstreckende Kontaktflächen aufweisen, wird eine direkte Kraftübertragung zwischen dem Antriebsbalken und dem Biegebalken erreicht.Due to the advantageous design, according to which the drive bar and the bending bar have mutually facing contact surfaces extending over a length of the drive bar, a direct force transmission between the drive bar and the bending bar is achieved.
Vorteilhaft sind dabei aber auch Ausbildungen nach den Ansprüchen 3 bis 5, weil dadurch in Abhängigkeit der Relativlage des Antriebsbalkens die Lage der Krafteinleitung in den Biegebalken über seine Länge variabel zur Anpassung an eine vorgesehene Position der Biegewerkzeuge ist.However, designs according to
Möglich ist dabei eine Ausbildung nach Anspruch 6, wodurch die erforderliche Schwenkbarkeit zur Anpassung der Lage der Kraftübertragung zwischen dem Antriebsbalkens und dem Biegebalken an die vorgesehene Position der Biegewerkzeuge reduziert wird.An embodiment according to
Konstruktiv einfache und fertigungstechnisch vorteilhafte Ausbildungen beschreiben aber auch die Ansprüche 7 bis 9.However, claims 7 to 9 also describe structurally simple and technically advantageous designs.
Es ist aber auch eine Ausbildung nach Anspruch 10 vorteilhaft, weil dadurch zusätzlich Bauelemente eingespart werden und eine Vorspannung zur spielfreien Anlage der Kontaktflächen des Antriebsbalkens und des Biegebalkens erreicht wird.However, an embodiment according to
Schließlich sind aber auch Ausbildungen nach den Anspruch 11 bis 13 vorteilhaft, wodurch Varianten zur Bildung des Kupplungselementes verfügbar sind.Finally, however, designs according to
Die Aufgabe der Erfindung wird aber auch durch ein Verfahren gemäß den Maßnahmen nach Anspruch 14 erreicht. Der Vorteil liegt darin, dass dadurch eine annähernd symmetrische Durchbiegung unter Last des Tischbalkens und des Biegebalkens erreicht wird wodurch Winkelfehler am Werkteil weitestgehend vermieden werden und vielfach Nachjustierungen der Verstellwege der Antriebsmittel nicht erforderlich sind.The object of the invention is also achieved by a method according to the measures according to
Es sind aber auch Maßnahmen, wie sie im Anspruch 15 beschrieben sind, vorteilhaft, weil durch eine Verlagerung der Kraftwirklinie der Umformkraft und damit eines Krafteinleitungspunktes am Biegebalken die Umformwirkung während eines Korrektur- Umformhubes aus einer Mittelstellung, bezogen auf die Biegelänge, in einen außermittigen, einer Nachformung des Werkteil insbesondere zu unterziehenden Bereich verstellt wird und damit die Umformqualität gesteigert wird.However, measures as described in
Die Erfindung wird anhand der in den Fig. dargestellten Ausführungsbeispielen näher erläutert.The invention is explained in more detail with reference to the embodiments shown in the figures.
Es zeigen:
- Fig. 1
- eine erfindungsgemäße Biegepresse in Ansicht;
- Fig. 2
- die Presse in Ansicht gemäß in Richtung II in
Fig.1 ; - Fig. 3
- eine Detaildarstellung des zweigeteilten Pressenbalkens, geschnitten gemäß den Linien III-III in
Fig.4 ; - Fig. 4
- der zweigeteilten Pressenbalken, geschnitten gemäß den Linien IV-IV in
Fig.3 ; - Fig. 5
- die erfindungsgemäße Biegepresse in Ansicht.
- Fig. 1
- a bending press according to the invention in view;
- Fig. 2
- the press in view according to direction II in
Fig.1 ; - Fig. 3
- a detailed representation of the two-part press beam, cut along the lines III-III in
Fig. 4 ; - Fig. 4
- the two-part press beam, cut along lines IV-IV in
Fig. 3 ; - Fig. 5
- the bending press according to the invention in view.
Einführend sei festgehalten, dass in den unterschiedlich beschriebenen Ausführungsformen gleiche Teile mit gleichen Bezugszeichen bzw. gleichen Bauteilbezeichnungen versehen werden, wobei die in der gesamten Beschreibung enthaltenen Offenbarungen sinngemäß auf gleiche Teile mit gleichen Bezugszeichen bzw. gleichen Bauteilbezeichnungen übertragen werden können. Auch sind die in der Beschreibung gewählten Lageangaben, wie z.B. oben, unten, seitlich usw. auf die unmittelbar beschriebene sowie dargestellte Figur bezogen und sind bei einer Lageänderung sinngemäß auf die neue Lage zu übertragen. Weiters können auch Einzelmerkmale oder Merkmalskombinationen aus den gezeigten und beschriebenen unterschiedlichen Ausführungsbeispielen für sich eigenständige, erfinderische oder erfindungsgemäße Lösungen darstellen.By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference symbols or the same component designations, whereby the disclosures contained in the entire description can be transferred accordingly to the same parts with the same reference symbols or the same component names. The position details chosen in the description, such as for example above, below, to the side, etc., refer to the figure immediately described and shown and are to be transferred accordingly to the new position in the event of a change in position. Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.
Sämtliche Angaben zu Wertebereichen in gegenständlicher Beschreibung sind so zu verstehen, dass diese beliebige und alle Teilbereiche daraus mit umfassen, z.B. ist die Angabe 1 bis 10 so zu verstehen, dass sämtliche Teilbereiche, ausgehend von der unteren Grenze 1 und der oberen Grenze 10 mitumfasst sind, d.h. sämtliche Teilbereich beginnen mit einer unteren Grenze von 1 oder größer und enden bei einer oberen Grenze von 10 oder weniger, z.B. 1 bis 1,7, oder 3,2 bis 8,1 oder 5,5 bis 10.All information on value ranges in the present description should be understood to include any and all sub-areas, e.g. the
In den
Ein Maschinengestell 5 der Biegepresse 1 besteht beispielsweise aus einer Bodenplatte 6 auf der vertikal aufragend, zueinander beabstandet und parallel zueinander ausgerichtet, Seitenwangen 7, 8 angeordnet sind. Diese sind bevorzugt durch einen massiven, beispielsweise aus einem Blechformteil gebildeten Querverband 9 an ihren von der Bodenplatte 6 distanzierten Endbereichen verbunden.A
Die Seitenwangen 7, 8 sind zur Bildung eines Freiraumes für das Umformen des Werkteiles 3 etwa C-förmig ausgebildet, wobei an Frontstimflächen 10 von bodennahen Schenkeln 11 der Seitenwangen 7, 8 ein feststehender, auf der Bodenplatte 6 aufstehender Tischbalken 12 befestigt ist. An Frontstimflächen 13 von der Bodenplatte 6 entfernten Schenkeln 14 der Seitenwangen 7, 8 sind lineare Führungsanordnungen 15 für einen relativ zum Tischbalken 12 verstellbaren Pressenbalken 16 vorgesehen. Der Pressenbalken 16 ist im gezeigten Ausführungsbeispiel über zwei voneinander distanzierte Antriebsmittel 17, 18 der Antriebsanordnung 19 - gemäß Doppelpfeil 20 - verstellbar. Damit wird das Umformen und Bilden des Werkteils 3 zwischen den auf gegenüberliegenden Stützflächen 21, 22 des Pressenbalkens 16 und des Tischbalkens 12 angeordneten Biegewerkzeugen 4, bei einem Verstellhub des Pressenbalkens 16, vorgenommen.The
Die Antriebsanordnung 19 ist im gezeigten Ausführungsbeispiel ein Hydroantrieb mit doppelseitig beaufschlagten Hydrozylindern 23 als die Antriebsmittel 17, 18, wobei Kolbenstangen 24 mit den Pressenbalken 16 über Kugel- Kalottenlager 25 mit dem Pressenbalken 16 verbunden sind, wodurch in einem eingeschränkten Bereich eine Schwenkbewegung des Pressenbalkens 15, durch unterschiedliche Verstellwege der Antriebsmittel 17, 18, in einer zu einer Frontfläche des Pressenbalkens 16 parallelen Ebene ermöglicht wird und damit eine Eintauchtiefe der Biegewerkzeuge 4 beeinflussbar ist.In the exemplary embodiment shown, the
Die Hydrozylinder 23 sind im gezeigten Ausführungsbeispiel mit Gehäusen 26 am Querverband 9 befestigt. Möglich ist aber auch eine Ausbildung wonach die Gehäuse 26 unmittelbar an den Seitenwangen 7, 8 befestigt sind.In the exemplary embodiment shown, the
Wie nun besser der
Der Antriebsbalken 27 und der Biegebalken 30 weisen in der schlitzförmigen Aufnahme 29 einander zugewandte Kontaktflächen 33, 34 auf, wobei die Kontaktfläche 33 des Antriebsbalkens 27 in Richtung der Länge 28 bogenförmig gekrümmt verläuft, wohingegen die Kontaktfläche 34 des Biegebalkens 30 in der Aufnahme 29 geradlinig und in einer zu der Ebene 31 der Stützfläche 21 des Biegebalkens 30 parallelen Ebene 35 verläuft.
Über ein etwa im Mittel der Länge 28 angeordnetes, den Antriebsbalken 27 mit dem Biegebalken 30 verbindendes, elastisches Kupplungselement 36 - auf das noch später im Detail näher eingegangen wird - ist ein spielfreier Kontakt der Kontaktflächen 33, 34 des Antriebsbalkens 27 und des Biegebalkens 30 in der schlitzförmigen Aufnahme 29 gewährleistet.The
Via an
Dies wird dadurch erreicht, dass das Kupplungselement 36 nach dem gezeigten Ausführungsbeispiel durch ein Federpaket 37 in Durchbrüchen 38, 39 des Antriebsbalken 27 und des Biegebalkens 30 gebildet ist, wobei die vom Federpaket 37 bewirkte Federkraft größer ist als das Eigengewicht des Biegebalkens 30 zuzüglich den auftretenden Beschleunigungskräften, die bei einer Verstellbewegung des Pressenbalkens 16 in eine obere Endlage auftritt.This is achieved in that the
In den
Der Antriebsbalken 27 ragt in die schlitzförmige Aufnahme 29 des Biegebalkens 30 ein, wobei sich die in der Ebene 35 erstreckende Kontaktfläche 34 und die dieser zugewandte bogenförmig verlaufende Kontaktfläche 33 des Antriebsbalkens 27 linienförmig berühren.The
In die Aufnahme 29 des Biegebalkens 30 seitlich begrenzenden Schenkeln 41, 42 ist der diese querende Durchbruch 38, in Rechteckform, angeordnet. Im Antriebsbalken 27 und diesen querend ist ebenfalls der in Rechteckform ausgebildete Durchbruch 39 angeordnet.In the
Bezogen auf die Kontaktfläche 34 des Biegebalkens 30 ist ein vertikal gemessener Abstand 43 des Durchbruchs 38 kleiner als ein Abstand 44 des Durchbruchs 39 im Antriebsbalken 27, bezogen auf einen Scheitelpunkt 45 der Kontaktfläche 33.In relation to the
Die Durchbrüche 38, 39 und über eine Dicke 46 des Biegebalkens 30 erstreckend, ist eine obere und eine untere Druckplatte 47, 48 angeordnet, welche über die dazwischen angeordnete Spiraldruckfeder 40 die Vorspannung in den Durchbrüchen 38, 39 bewirken und womit die spielfreie Anlage der Kontaktflächen 33, 34 zwischen dem Antriebsbalken 27 und dem Biegebalken 30 in der Aufnahme 29 erreicht wird.The
Ein seitliches Spiel der Druckplatten 47, 48 in den Durchbrüchen 38, 39 ermöglicht aber eine Schrägstellung des Antriebsbalkens 27 relativ zum Biegebalken 30 und damit ein "Wandern" der linienförmigen Berührung zwischen den Kontaktflächen 33, 34 in Richtung der Länge 28 des Biegebalkens 30 und damit eine Veränderung einer Kraftwirklinie 49 in Abhängigkeit einer vorgesehene Position der Biegewerkzeuge 4 am Biegebalken 30 und Tischbalken 12 - wie dies nachfolgend der Beschreibung der
In der
Die Bestückung der Biegepresse 1 mit den Biegewerkzeugen 4 im Biegebalken 30 und dem Tischbalken 12 zeigt eine außermittige Anordnung der Biegewerkzeuge 4 wie sie oft dann gewählt wird, wenn beispielsweise auf die Länge 28 des Biegebalkens 30 verteilt mehrere Werkzeugsätze für unterschiedliche Biegevorgänge zur Anwendung kommen.The assembly of the
Eine derartige Bestückung bedeutet eine unterschiedliche Kraftaufbringung an den Krafteinleitungsstellen, beispielsweise den Kugel- Kalottenlagern 25 und eine unsymmetrische Ausbildung der beim Biegevorgang am Biegebalken 30 und Tischbalken 12 auftretenden Durchbiegung, wobei es dann bei herkömmlichen Biegepressen mit einteiligen Pressenbalken zu Biegeungenauigkeiten kommt, da eine Eintauchtiefe der Biegewerkzeuge 4 bei einer exzentrischen Anordnung unterschiedlich ausfällt und damit es zu den Ungenauigkeiten bei einem für einen bestimmten Biegewinkel vorgegebenen Verstellweg, der gemessen und gesteuert wird, führt.Such assembly means different force application at the force introduction points, for example the
Bei der gezeigten Ausführung mit dem zweigeteilten Pressenbalken 16, bestehend aus dem Antriebsbalken 27 mit der bogenförmigen Kontaktfläche 33 und der Kraftübertragung auf die in der Ebene 35 sich erstreckende Kontaktfläche 34 des Biegebalkens 30, wird durch eine Schrägstellung des Antriebsbalkens 27, die das elastische Kupplungselement 36 ermöglicht, die Kraftwirklinie 49 zur Übertragung der Druckkraft zwischen dem Antriebsbalken 27 und dem Biegebalken 30 in Richtung der Länge 28 verlagert und damit für den Umformvorgang des Werkteiles 3, aufgrund der Exzentrizität der Bestückung mit den Biegewerkzeugen 4 auftretenden Reaktionskraft, gemäß - Pfeil 50 - in fluchtende Übereinstimmung gebracht.In the embodiment shown with the two-
Die Verschwenkung des Antriebsbalkens 27 erfolgt durch unterschiedliche Verstellung der Antriebsmitteln wodurch, wie gezeigt, die Bolzenlager 25 eine entsprechend unterschiedliche Lage einnehmen und eine Schwenklage des Antriebsbalkens 27 erreicht wird.The pivoting of the
Die maximale Schrägstellung des Antriebsbalkens 27 aus seiner waagrechten Neutrallage beträgt einmal eine Segmenthöhe 51 der bogenförmig gekrümmten Kontaktfläche 33, wobei die Segmenthöhe 51 in Abhängigkeit von der jeweiligen Länge 28 des Antriebsbalkens 27 gewählt wird. Für die vorgesehene Funktion, den Kraftübertragungspunkt des Antriebsbalkens 27 entsprechend der Lage des Werkzeugsatzes zu positionieren ist nur eine geringe Segmenthöhe 51, in einem Ausmaß zwischen etwa 0,2% bis etwa 2,0 % der Länge 28 des Antriebsbalkens 27 ausreichend.The maximum inclination of the
Weiter ist der
Die erfindungsgemäße Biegepresse 1 mit dem zweigeteilten Pressenbalken 16 ermöglicht, wie bereits teilweise vorhergehend beschrieben den Krafteinleitungspunkt am Biegebalken 30 durch ein Schwenken des Antriebsbalkens 27 mittels entsprechend vorgewählter Verstellwege der Antriebsmittel 17, 18 in eine fluchtender Lage mit der Kraftwirklinie 49 der für einen Umformvorgang an dem Werkteil 3 aufzubringenden Kraft, zu bringen.The bending
Dies erfolgt bevorzugt automatisiert bei Abrufen von in einem Arbeitsprogramm hinterlegter Daten, beispielsweise nach in einem Datenspeicher hinterlegter Parameter, z.B. Position der Werkzeugsätze bzw. eines Bestückungsschema der Biegepresse 1, mit einer oder mehreren Biegestationen aus zusammenwirkenden Biegewerkzeugen., der Biegelänge, der Werkteildaten, der Geometrie des Antriebsbalkens 27 etc.This is preferably done automatically when data stored in a work program is called up, for example according to parameters stored in a data memory, e.g. position of the tool sets or an assembly diagram of the
Nach erfolgter Positionierung des Antriebsbalkens 27 erfolgt der Umformvorgang durch die Verstellung des Antriebsbalkens 27 in der geschwenkten Lage um jeweils einen gleichen Verstellweg der Antriebsmittel und erfolgt damit die Verstellung des Biegebalkens 30 um den für eine vorgegebene Umformung, z.B. Biegewinkel, erforderlichen Verstellweg zur Erreichung einer für den Biegewinkel erforderlichen Eintauchtiefe der Biegewerkzeuge.After positioning the
Durch eine übereinstimmende Positionierung des Krafteinleitungspunktes am Biegebalken mit der Lage der Kraftwirklinie tritt am Biegebalken nahezu keine kraftbedingte Durchbiegung ein und ist nur die in ihrer Größenordnung, z.B. aus einer im Datenspeicher hinterlegter Datenmatrix, erfassbare Durchbiegung des Tischbalkens für eine qualitativ hochwertige Umformung zu berücksichtigen.Due to the fact that the force application point on the bending beam matches the position of the force line, there is almost no force-related deflection on the bending beam and only the deflection of the table beam that can be detected in its magnitude, e.g. from a data matrix stored in the data memory, needs to be taken into account for high-quality forming.
Um diese zu erreichen ist es beispielsweise auch möglich, nach erfolgtem Umformhub einen Entlastungsrückhub mit den Antriebsmitteln vorzunehmen und den erzielten Winkel am Werkteil zu vermessen und damit etwaige Ungenauigkeiten festzustellen und durch Vornahme eines neuerlichen Umformhubes, unter Vorgabe eines Korrekturfaktors für die Eintauchtiefe, zu korrigieren. Dabei ist es auch möglich, insbesondere bei großen Biegelängen vorteilhaft, während des Umformhubes den Krafteinleitungspunkt, ist gleich den Berührungspunkt der Kontaktflächen 33, 34, und damit die Kraftwirklinie 49 in Richtung der Längserstreckung der Biegewerkzeuge 4, durch eine automatisierte Nachjustierung der Schwenklage des Antriebsbalkens 27 zu verändern.In order to achieve this, it is also possible, for example, to carry out a relief return stroke with the drive means after the forming stroke has taken place and to measure the angle achieved on the workpiece and thus to determine any inaccuracies and to correct it by performing a new forming stroke, specifying a correction factor for the immersion depth. It is also possible, particularly advantageous for large bending lengths, to place the force application point during the forming stroke, which is the same as the point of contact of the contact surfaces 33, 34, and thus the line of
Die Ausführungsbeispiele zeigen mögliche Ausführungsvarianten der Biegepresse 1, wobei an dieser Stelle bemerkt sei, dass die Erfindung nicht auf die speziell dargestellten Ausführungsvarianten derselben eingeschränkt ist, sondern vielmehr auch diverse Kombinationen der einzelnen Ausführungsvarianten untereinander möglich sind und diese Variationsmöglichkeit aufgrund der Lehre zum technischen Handeln durch gegenständliche Erfindung im Können des auf diesem technischen Gebiet tätigen Fachmannes liegt. Es sind also auch sämtliche denkbaren Ausführungsvarianten, die durch Kombinationen einzelner Details der dargestellten und beschriebenen Ausführungsvariante möglich sind, vom Schutzumfang der beiliegenden Ansprüche mit umfasst.The exemplary embodiments show possible design variants of the
Der Ordnung halber sei abschließend darauf hingewiesen, dass zum besseren Verständnis des Aufbaus der Biegepresse diese bzw. deren Bestandteile teilweise unmaßstäblich und/oder vergrößert und/oder verkleinert dargestellt wurden.For the sake of clarity, it should finally be pointed out that, for a better understanding of the structure of the bending press, it or its components have been shown partially not to scale and / or enlarged and / or reduced.
Claims (15)
- A bending press (1), in particular a press brake (2), with a machine frame (5), with side walls (7, 8) and a fixed table beam (12) distancing the side walls, and with a press beam (16) adjustable relative to the table beam (12) in linear guide arrangements (15) of the machine frame (5), with a driving arrangement (19) consisting of at least two driving means (17, 18) distanced from one another,- wherein the press beam (16) is formed by a driving beam (27) drive-connected to the driving means (17, 18)- and a bending beam (30) that is movement-connected thereto by means of at least one elastic coupling element (36), characterized in that- the bending beam (30) has a slit-shaped receptacle (29) extending over an entire length (28) of the press beam (16)- and the driving beam (27) protrudes into said receptacle (29),- wherein the driving beam (27) and the bending beam (30) have contact surfaces (33, 34) facing each other in the slit-shaped receptacle (29),- wherein the contact surface (34) of the bending beam (30) extends in a straight line and in a plane (35) parallel to a plane (31) of a support surface (21) of the bending beam (30)- and wherein the contact surface (33) of the driving beam (27) extends curved in an arc-shaped manner in the direction of the length (28) of the driving beam (27).
- The bending press (1) according to claim 1, characterized in that the driving beam (27) is connected to the bending beam (30) in a pivotable manner by means of the coupling element (36).
- The bending press (1) according to one of the preceding claims, characterized in that the contact surface (33) of the driving beam (27) is formed so as to be curved in a convex manner.
- The bending press (1) according to one of the preceding claims, characterized in that the contact surface (33) of the driving beam (27) extends curved in the shape of a circular arc.
- The bending press (1) according to one of the preceding claims, characterized in that the driving arrangement (19) with the driving means (17, 18) is configured for an adjusting stroke that is optionally equal or different depending on the driving means (17, 18).
- The bending press (1) according to one of the preceding claims, characterized in that a segment height (51) of the contact surface (33) measured in the middle of the length (28) of the driving beam (27) amounts to about 0.2% to 2.0% of the length (28) of the driving beam (27).
- The bending press (1) according to one of the preceding claims, characterized in that the driving beam (27) and the bending beam (30) are formed so as to overlap with wall parts in the adjusting direction.
- The bending press (1) according to one of the preceding claims, characterized in that a base surface of the receptacle (29) forms the contact surface (34) of the bending beam (30).
- The bending press (1) according to one of the preceding claims, characterized in that the contact surface (34) of the bending beam (30) extends in a plane parallel to the tool support surface (22).
- The bending press (1) according to one of the preceding claims, characterized in that the coupling element (36) is arranged approximately in the middle of the length (28) of the driving beam (27) in openings (38, 39) traversing the driving beam (27) and the bending beam (30).
- The bending press (1) according to one of the preceding claims, characterized in that the coupling element (36) is formed by a spring assembly (37) having at least one recoil spring (40).
- The bending press (1) according to one preceding claims, characterized in that the coupling element (36) is formed by at least one hydro spring element.
- The bending press (1) according to one of the preceding claims, characterized in that the coupling element (36) is formed by at least one plastic pressure pad traversing the openings (38, 39).
- A method for operating a bending press (1), in particular a press brake (2), with a machine frame (5), with side walls (7, 8) and a fixed table beam (12) distancing the side walls (7, 8), and with a press beam (16) adjustable relative to the table beam (12) in linear guide arrangements (15) of the machine frame (5), with a driving arrangement (19) consisting of at least two driving means (17, 18) distanced from one another, wherein the press beam (16) is formed by a driving beam (27) drive-connected to the driving means (17, 18) and a bending beam (30) that is movement-connected thereto by means of at least one elastic coupling element (36), characterized in that the driving beam (27) and the bending beam (30) have contact surfaces (33, 34) facing each other and extending over a length (28) of the driving beam (27), and that upon starting a deformation process, the predefined position of the corresponding bending tool set starting from a 0-coordinate of the table beam (12), which coordinate is defined by a force action line of one of multiple driving means (17, 18) for applying a pressing force to the bending beam (30), is obtained from a work program, and subsequently, an angular position for the driving beam (27) is determined according to the geometry of the driving beam (27), in a computer of a control and adjustment device of the bending press (1), and said angular position is adjusted by controlling the driving means (17, 18) for an adjustment track of at least one of the driving means (17, 18), at which a position of the contact surface (33), extending curved in an arc-shaped manner, of the driving beam (27) is reached, in which the force action line of the deformation force to be applied is in an aligned orientation with a force action line (49) of a reaction force acting on the bending beam (30) due to the deformation process, and subsequently, the control of the driving means (17, 18) that are drive-connected to the driving beam (27) for adjusting the bending beam (30) into an engagement position of the bending tools (4) intended for the predefined deformation process on the workpiece (3) is carried out.
- The method according to claim 14, characterized in that after reaching the intended engagement position, the driving means (17, 18) are controlled for a load relief stroke, and subsequently, the deformation on the workpiece (3), in particular a deformation angle, is measured, and when an angle deviation is detected, a new engagement position is calculated and controlled by adjusting the press beam (16), wherein, during the correction deformation stroke, a shifting of the force action line in the direction of the bending length is carried out by pivoting the driving beam (27) for compensating possible different angle deviations with respect to a bending length.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0013609A AT507808B1 (en) | 2009-01-27 | 2009-01-27 | BENDING PEG WITH A DRIVE BAR AND ELASTICALLY COUPLED BENDING BAR |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2210680A2 EP2210680A2 (en) | 2010-07-28 |
EP2210680A3 EP2210680A3 (en) | 2014-12-17 |
EP2210680B1 true EP2210680B1 (en) | 2021-02-24 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP10000736.8A Active EP2210680B1 (en) | 2009-01-27 | 2010-01-26 | Bending press with a drive beam and elastically coupled bending beam |
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EP (1) | EP2210680B1 (en) |
AT (1) | AT507808B1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2479022A1 (en) * | 2011-01-24 | 2012-07-25 | Osterwalder AG | Powder press |
DE102011116085A1 (en) * | 2011-10-12 | 2013-04-18 | Weinbrenner Maschinenbau Gmbh | bending machine |
DE102012102594B4 (en) * | 2012-03-26 | 2014-05-08 | Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg | Method for producing molded parts from plastic |
CN113526853B (en) * | 2021-08-05 | 2023-01-06 | 安徽荣耀光电科技有限公司 | Toughened glass processing system and processing technology |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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DE4138286A1 (en) | 1991-11-21 | 1993-05-27 | M & S Brugg Ag | PRESS |
JP2819448B2 (en) * | 1994-10-20 | 1998-10-30 | 丸機械工業株式会社 | Hydraulic press brake |
ITTO20020904A1 (en) * | 2002-10-17 | 2004-04-18 | Alberto Arduino | BENDING PRESS WITH TOOL BEARING SUBSTANTIALLY |
-
2009
- 2009-01-27 AT AT0013609A patent/AT507808B1/en not_active IP Right Cessation
-
2010
- 2010-01-26 EP EP10000736.8A patent/EP2210680B1/en active Active
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Publication number | Publication date |
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AT507808A1 (en) | 2010-08-15 |
EP2210680A3 (en) | 2014-12-17 |
AT507808B1 (en) | 2011-02-15 |
EP2210680A2 (en) | 2010-07-28 |
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