EP1311355B1 - Tool clamping device for a shaping tool, especially for a press brake - Google Patents

Tool clamping device for a shaping tool, especially for a press brake Download PDF

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Publication number
EP1311355B1
EP1311355B1 EP01953656A EP01953656A EP1311355B1 EP 1311355 B1 EP1311355 B1 EP 1311355B1 EP 01953656 A EP01953656 A EP 01953656A EP 01953656 A EP01953656 A EP 01953656A EP 1311355 B1 EP1311355 B1 EP 1311355B1
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EP
European Patent Office
Prior art keywords
tool
clamping device
adapter
tool adapter
clamping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP01953656A
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German (de)
French (fr)
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EP1311355A1 (en
Inventor
Gerhard Sperrer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trumpf Maschinen Austria GmbH and Co KG
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Trumpf Maschinen Austria GmbH and Co KG
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Priority to AT01953656T priority Critical patent/ATE305830T1/en
Publication of EP1311355A1 publication Critical patent/EP1311355A1/en
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Publication of EP1311355B1 publication Critical patent/EP1311355B1/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
    • 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
    • B21D5/0209—Tools therefor
    • 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
    • B21D5/0209—Tools therefor
    • B21D5/0236—Tool clamping

Definitions

  • the invention relates to a tool clamping device, as in the preamble of claim 1 (see for example EP-A-0 934 782).
  • the tool adapter is according to this known embodiment on a side surface of the Attached pressure bar and has to transmit the pressing force with the end face of the Pressure beam cooperating and coming to this plant pressure piece on.
  • a disadvantage of this design is that the bending deformation occurring during a pressing operation of the pressure beam and the bending line adapting tool adapters in Consequence of the different radius of the neutral zone to the center of curvature an undefinable Relative movement in the direction of the longitudinal extent of the pressure bar between causes this and the tool adapters. This occurs in extreme cases, a hiking the Tool adapter on the pressure bar from a predetermined position within a through Tolerances predetermined game of fasteners. This relative shift, which also occurs between the lower and upper tool caused incorrectly processed Factory parts and thus an increased control effort and a cost increase.
  • the document US 4,620,435 A relates to a bending compensation device for a tool receiving device a bending press.
  • a bending compensation device for a tool receiving device a bending press.
  • the object of the invention is therefore to provide a tool clamping device in which the tool adapter after completion of the bending effecting pressing and occurrence of a change in position of the tool adapter relative to the pressure bar in the Origin can be traced back.
  • a further advantageous embodiment describes the claim 12, because thereby on the required Fastening means restoring forces are effective in the deformation, the one Allow the tool adapter to return to its original position.
  • an embodiment according to claim 14 is advantageous because thereby the lateral Deflection and the springback behavior in the tool adapter between the receiving and The connection range can be optionally set.
  • 1 and 2 is a tool holding device 1 a tool clamping device. 2 for molding tools 3, e.g. Bending punch, bending dies on a pressure bar 4, for example for a press brake 5, shown.
  • tools e.g. Bending punch, bending dies on a pressure bar 4, for example for a press brake 5, shown.
  • a on a side surface 6 of the pressure bar 4 by means of a pressure bar with the fourth bolted terminal block 7 held tool adapter 8 is such as executed, one of which is supported against a pressure surface 9 of the pressure bar 4 Pressure piece 10, the opposing and the pressure piece 10 superior strip-shaped Clamping 11, 12 at a distance 13, the thickness of a 14 of the mold. 3 corresponds, distanced from each other, whereby a groove-shaped receiving portion 15 for the Mold 3 is formed.
  • One of the clamping jaws 11, 12, in the illustrated embodiment, the clamping claw 11, surmounted the pressure surface 9 in the direction of the pressure bar 4 and overlaps it on the side surface 6, whereby a connecting portion 16 for a frictional engagement of the clamping jaw 11 and so that the tool adapter 8 in cooperation with the terminal block 7 a number of the pressure bar 4 crossing, in threaded engagement with the terminal block 7 stationary fasteners 17, e.g. Screws, is achieved.
  • the design of the tool adapter 8 now sees an elastically recoverable, in the direction the longitudinal extent of the pressure bar 4 according to a double arrow 20 possible relative adjustment between the receiving area 15 and the connecting area 16. To is between these areas one over an entire thickness 21 of a clamping extension 22 and in approximately parallel to the pressure surface 9 of the pressure bar 4 extending material separation 23, e.g. Parting line 24, provided, which extends in the direction of a length 25 of the tool adapter 8 and at a lateral distance 26 to opposite end faces 27, 28 of the tool adapter 8 in to these end faces 27, 28 parallel in the direction of the tool holder 15 extending material passages 29 passes.
  • Parting line 24 provided, which extends in the direction of a length 25 of the tool adapter 8 and at a lateral distance 26 to opposite end faces 27, 28 of the tool adapter 8 in to these end faces 27, 28 parallel in the direction of the tool holder 15 extending material passages 29 passes.
  • the receiving region 15 facing end portions 33, 34 along the end faces 27, 28 extending material passages 29 may be formed differently, to achieve the rebound and restoring behavior of the connecting webs 30, 31.
  • the connecting bridges 30, 31 form by the elastic properties of the material of the Tool adapters 8 return means 34, 35, which compensate for the different, at deflection of the pressure bar 3 at a working stroke occurring differences in length and associated displacement effects between the pressure bar 3 and the tool adapter Counteract 8 and thus a so-called migration of the tool adapter. 8 effectively prevent along the pressure surface 9.
  • Fig. 3 is another embodiment of a equipped with a return means 36 Tool adapter 8 shown.
  • the return means 36 acts between the tool adapter 8 and the pressure bar 4.
  • the emphasis is placed on that at one by the different Bending lines occurring displacement of the tool adapter 8 on the pressure bar 4 after Termination of the pressure stroke and thus the deflection by the return means 36 a Return of the tool adapter 8 takes place on the pressure bar 4 in the original position.
  • the coefficient of friction reducing sliding or rolling means 37 To have the tool adapter 8 and / or the pressure bar 4 in the connection area the coefficient of friction reducing sliding or rolling means 37.
  • Fig. 4 is another embodiment of a return means 39 between the tool adapter 8 and the pressure bar 4 for returning a successful migration movement between the tool adapter 8 and the pressure bar 4 shown.
  • the return means 39 as the pressure surface 9 of the pressure bar 4 in vertical Direction between the pressure bar 4 and the pressure piece 10 used as bending springs
  • Bar springs formed pins 40 are provided, which in a relative movement between the Pressure bar 4 and the pressure piece 10 upon the occurrence of a displacement force bending deformation experienced, after elimination of the displacement force by the springback a Return to the original position.
  • Receiving holes 41, 42 in the pressure bar. 4 and the pressure piece 10 are designed as stepped holes, an exemption of the Make pins 40 for a bending deformation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention relates to a tool clamping device (2) for a shaping tool (3), especially for a bending punch or a bending die mounted on a press beam (4), especially for a press brake (5). The press beam (4) of said tool clamping device is adapted to detachably retain the shaping tool (3) and is provided with a tool adapter (8) that can be fastened on the press beam (4). At least one spring-elastic return means (34, 35, 36, 39) is disposed between a receiving section (15) of the tool adapter (8) for the shaping tool (3) and a connecting section (16) connecting the tool adapter (8) with the press beam (4) or between the latter and the tool adapter (8) or the shaping tool (3). Said return means counteracts at least one relative movement between the tool adapter (8) or the shaping tool (3) and the press beam (4) in the longitudinal direction.

Description

Die Erfindung betrifft eine Werkzeugspannvorrichtung, wie im Oberbegriff des Anspruches 1 beschrieben (siehe z.B. EP-A- 0 934 782).The invention relates to a tool clamping device, as in the preamble of claim 1 (see for example EP-A-0 934 782).

Zur lösbaren Halterung von Formwerkzeugen, wie z.B. Pressenstempel, Pressengesenk an Druckbalken, insbesondere an Abkantpressen, sind in Längsrichtung des Druckbalkens verlaufende und mit diesem bewegungsfest verbundene Werkzeugadapter, die eine nutförmige Aufnahme für die Werkzeuge ausbilden, bekannt. In der Aufnahme werden die Werkzeuge mittels einer Klemmeinrichtung positioniert und gehaltert. Die Ausbildung der Werkzeugadapter und der Werkzeuge ist modulartig aufeinander abgestimmt und ist ein Druckbalken durch eine Aneinanderreibung der Werkzeugadapter, die eine Teillänge einer Länge des Druckbalkens aufweisen, bestückt.For releasably holding molds, e.g. Press stamp, press dies on Pressure bars, in particular on press brakes, extending in the longitudinal direction of the pressure bar and with this immovable connected tool adapter, which is a groove-shaped Training admission for the tools is known. In the recording are the tools positioned and held by means of a clamping device. The training of tool adapters and the tools is modularly matched and is a pressure bar by a juxtaposition of the tool adapter, which is a partial length of a length of Pressure bar exhibit, equipped.

Der Werkzeugadapter wird nach dieser bekannten Ausführung an einer Seitenfläche des Druckbalkens befestigt und weist zur Übertragung der Preßkraft ein mit der Stirnfläche des Druckbalkens zusammenwirkendes und an dieser zur Anlage kommendes Druckstück auf. Nachteilig bei dieser Ausführung ist, daß die bei einem Preßvorgang auftretende Biegeverformung des Druckbalkens und den sich der Biegelinie anpassenden Werkzeugadaptem in Folge des unterschiedlichen Radius der neutralen Zone zum Krümmungsmittelpunkt eine undefinierbare Relativbewegung in Richtung der Längserstreckung des Druckbalkens zwischen diesen und den Werkzeugadaptern bewirkt. Dadurch tritt im Extremfall ein Wandern der Werkzeugadapter am Druckbalken aus einer vorgegebenen Position innerhalb eines durch Toleranzen vorgegebenen Spiels der Befestigungselemente ein. Diese Relativverschiebung, die auch zwischen dem Unter- und Oberwerkzeug eintritt, verursacht fehlerhaft bearbeitete Werkteile und damit einen erhöhten Kontrollaufwand und eine Kostenerhöhung.The tool adapter is according to this known embodiment on a side surface of the Attached pressure bar and has to transmit the pressing force with the end face of the Pressure beam cooperating and coming to this plant pressure piece on. A disadvantage of this design is that the bending deformation occurring during a pressing operation of the pressure beam and the bending line adapting tool adapters in Consequence of the different radius of the neutral zone to the center of curvature an undefinable Relative movement in the direction of the longitudinal extent of the pressure bar between causes this and the tool adapters. This occurs in extreme cases, a hiking the Tool adapter on the pressure bar from a predetermined position within a through Tolerances predetermined game of fasteners. This relative shift, which also occurs between the lower and upper tool caused incorrectly processed Factory parts and thus an increased control effort and a cost increase.

Das Dokument US 4,620,435 A betrifft eine Biegekompensationsvorrichtung für eine Werkzeugaufnahmevorrichtung einer Biegepresse. Bei über eine Gesamtlänge eines Biegebalkens vorgenommenen Umformvorgängen wird durch eine über die Gesamtlänge verteilte unterschiedliche Federungscharakteristik der Kompensationsvorrichtung ein Ausgleich der Biegelinie der Pressenbalken dadurch bewirkt, dass über die Gesamtlänge der unter Last verformten Pressenbalken ein gleicher Steigungswinkel der Biegekurve erreicht wird. Durch diese Maßnahmen zum Vorwölben eines Werkzeugsatzes wird ein über den gesamten Umformbereich gleichmäßiger Eingriff der Biegewerkzeuge erzielt. The document US 4,620,435 A relates to a bending compensation device for a tool receiving device a bending press. At over a total length of a bending beam Forming operations carried out by a distributed over the total length different Suspension characteristic of the compensation device balancing the bending line the press beam thereby causes over the entire length of the under load deformed Press beam a same pitch angle of the bending curve is achieved. Through these measures For protruding a tool set is a over the entire forming area achieved uniform engagement of the bending tools.

Aufgabe der Erfindung ist es nunmehr, eine Werkzeugspannvorrichtung zu schaffen, bei der die Werkzeugadapter nach Beendigung des die Durchbiegung bewirkenden Preßvorganges und Auftreten einer Lageänderung der Werkzeugadapter gegenüber dem Druckbalken in die Ursprungslage zurückgeführt werden.The object of the invention is therefore to provide a tool clamping device in which the tool adapter after completion of the bending effecting pressing and occurrence of a change in position of the tool adapter relative to the pressure bar in the Origin can be traced back.

Diese Aufgabe der Erfindung wird durch die im Anspruch 1 wiedergegebenen Merkmale erreicht. Der überraschende Vorteil dabei ist, daß damit ein Wandern der Formwerkzeuge bzw. der Werkzeugadapter in der Werkzeugspannvorrichtung in Längsrichtung des Druckbalkens, bedingt durch die Durchbiegung bei der Kraftaufbringung und den dabei auftretenden unterschiedlichen Längenänderungen wirkungsvoll vermieden wird.This object of the invention is achieved by the recited in claim 1 Features achieved. The surprising advantage is that it is a hiking of the Mold tools or the tool adapter in the tool clamping device in the longitudinal direction of the pressure beam, due to the deflection in the application of force and the occurring different changes in length is effectively avoided.

Vorteilhaft sind dabei Ausbildungen nach den Ansprüchen 2 bis 6, wodurch der Aufnahmebereich des Werkzeugadapters für das Formwerkzeug gegenüber dem Verbindungsbereich, in dem der Werkzeugadapter mit dem Druckbalken kraftschlüssig verbunden ist, Ausgleichsbewegungen in Längsrichtung des Druckbalkens vollführen kann und damit die kraftschlüssige Verbindung von Seitenkräften unbelastet bleibt und eine automatische Rückstellung des Aufnahmebereiches in die Ausgangslage nach Beendigung des Pressenhubes erfolgt.Advantageous are embodiments according to claims 2 to 6, whereby the receiving area of the tool adapter for the mold with respect to the connection area, in the tool adapter is frictionally connected to the pressure bar, compensating movements can perform in the longitudinal direction of the pressure bar and thus the non-positive Connection of lateral forces remains unloaded and an automatic return of the receiving area into the starting position after completion of the press stroke.

Weitere vorteilhafte Ausbildungen beschreiben die Ansprüche 7 bis 11, wodurch die Reibung in der kraftschlüssigen Klemmverbindung gegenüber der Abstützfläche zwischen dem Adapter und dem Druckbalken reduziert wird und damit die auftretenden unterschiedlichen Längendehnungen bei der Durchbiegung ausgeglichen werden und eine Rückführung des Werkzeugadapters in die Ausgangslage ermöglicht wird.Further advantageous embodiments describe the claims 7 to 11, whereby the friction in the non-positive clamping connection with respect to the support surface between the adapter and the pressure bar is reduced and thus the occurring different elongations be compensated at the deflection and a return of the tool adapter is made possible in the starting position.

Eine weitere vorteilhafte Ausbildung beschreibt der Anspruch 12, weil dadurch über die erforderlichen Befestigungsmittel Rückstellkräfte bei deren Verformung wirksam werden, die eine Rückführung des Werkzeugadapters in seine Ausgangslage ermöglichen.A further advantageous embodiment describes the claim 12, because thereby on the required Fastening means restoring forces are effective in the deformation, the one Allow the tool adapter to return to its original position.

Möglich ist aber auch eine Ausbildung nach Anspruch 13, weil dadurch die erforderlichen Rückstellkräfte über konstruktiv einfache und den Montageaufwand bei der Herstellung der Anlagen nicht wesentlich erhöhende Maschinenelemente erreicht wird.But is also possible training according to claim 13, because thereby the required Restoring forces over structurally simple and the assembly effort in the production of Equipment not significantly increasing machine elements is achieved.

Schließlich ist auch eine Ausbildung nach Anspruch 14 vorteilhaft, weil dadurch die seitliche Auslenkung und das Rückfederverhalten im Werkzeugadapter zwischen dem Aufnahme- und dem Verbindungsbereich wahlweise festgelegt werden kann. Finally, an embodiment according to claim 14 is advantageous because thereby the lateral Deflection and the springback behavior in the tool adapter between the receiving and The connection range can be optionally set.

Zum besseren Verständnis der Erfindung wird diese anhand der in den Figuren beschriebenen Ausführungsbeispiele näher erläutert.For a better understanding of the invention, this will be described with reference to the figures Embodiments explained in more detail.

Es zeigen:

Fig. 1
einen Teilbereich eines Druckbalkens einer Abkantpresse mit einem Ausführungsbeispiel einer erfindungsgemäßen Werkzeugspannvorrichtung in Seitenansicht, geschnitten;
Fig. 2
ein Ausführungsbeispiel einer erfindungsgemäßen Werkzeugspannvorrichtung, geschnitten gemäß den Linien II - II in Fig. 1;
Fig. 3
eine andere Ausführung der erfindungsgemäßen Werkzeugspannvorrichtung in Seitenansicht, geschnitten;
Fig. 4
eine weitere Ausführung der erfindungsgemäßen Werkzeugspannvorrichtung in Seitenansicht, geschnitten.
Show it:
Fig. 1
a partial region of a pressure bar of a press brake with an embodiment of a tool clamping device according to the invention in side view, cut;
Fig. 2
an embodiment of a tool clamping device according to the invention, cut according to the lines II - II in Fig. 1;
Fig. 3
another embodiment of the tool clamping device according to the invention in side view, cut;
Fig. 4
a further embodiment of the tool clamping device according to the invention in side view, cut.

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.By way of introduction, it should be noted that in the differently described embodiments the same parts are provided with the same reference numerals or the same component designations, the disclosures contained throughout the specification apply mutatis mutandis to the same Parts are transmitted with the same reference numerals or the same component designations can. Also, the location information chosen in the description, such as up down, laterally, etc. related to the immediately described and illustrated figure and are in the case of a change of position, to be transferred accordingly to the new situation.

In den Fig. 1 und 2 ist eine Werkzeughaltevorrichtung 1 einer Werkzeugspannvorrichtung 2 für Formwerkzeuge 3, z.B. Biegestempel, Biegegesenke an einem Druckbalken 4, beispielsweise für eine Abkantpresse 5, gezeigt.1 and 2 is a tool holding device 1 a tool clamping device. 2 for molding tools 3, e.g. Bending punch, bending dies on a pressure bar 4, for example for a press brake 5, shown.

Ein an einer Seitenfläche 6 des Druckbalkens 4 mittels einer mit dem Druckbalken 4 verschraubbaren Klemmleiste 7 gehalterter Werkzeugadapter 8 besteht, wie beispielsweise ausgeführt, aus einem sich gegen eine Druckfläche 9 des Druckbalkens 4 abstützenden Druckstück 10, das einander gegenüberliegende und das Druckstück 10 überragende leistenförmige Spannklauen 11, 12 in einem Abstand 13, der einer Dicke 14 des Formwerkzeuges 3 entspricht, voneinander distanziert, wodurch ein nutförmiger Aufnahmebereich 15 für das Formwerkzeug 3 gebildet ist. A on a side surface 6 of the pressure bar 4 by means of a pressure bar with the fourth bolted terminal block 7 held tool adapter 8 is such as executed, one of which is supported against a pressure surface 9 of the pressure bar 4 Pressure piece 10, the opposing and the pressure piece 10 superior strip-shaped Clamping 11, 12 at a distance 13, the thickness of a 14 of the mold. 3 corresponds, distanced from each other, whereby a groove-shaped receiving portion 15 for the Mold 3 is formed.

Eine der Spannklauen 11, 12, im gezeigten Ausführungsbeispiel die Spannklaue 11, überragt die Druckfläche 9 in Richtung des Druckbalkens 4 und überlappt diesen an der Seitenfläche 6, wodurch ein Verbindungsbereich 16 für eine reibschlüssige Anlage der Spannklaue 11 und damit des Werkzeugadapters 8 im Zusammenwirken mit der Klemmleiste 7 einer Anzahl von den Druckbalken 4 querenden, in Gewindeeingriff mit der Klemmleiste 7 stehenden Befestigungselementen 17, z.B. Schrauben, erreicht wird. Die in bezug auf das Druckstück 10 der Spannklaue 11 gegenüberliegende Spannklaue 12 ist hingegen nur im Bereich einer Seitenfläche 18 des Druckstückes 10 und dieses in Richtung des Formwerkzeuges 3 überragend angeordnet, wobei die die Spannklauen 11, 12 und das Druckstück 10 querenden Spannschrauben 19 in Gewindeeingriff mit dem Druckstück 10 stehen und damit eine lösbare Halterung des Formwerkzeuges 3 erreicht wird.One of the clamping jaws 11, 12, in the illustrated embodiment, the clamping claw 11, surmounted the pressure surface 9 in the direction of the pressure bar 4 and overlaps it on the side surface 6, whereby a connecting portion 16 for a frictional engagement of the clamping jaw 11 and so that the tool adapter 8 in cooperation with the terminal block 7 a number of the pressure bar 4 crossing, in threaded engagement with the terminal block 7 stationary fasteners 17, e.g. Screws, is achieved. With respect to the pressure piece 10 of Clamping claw 11 opposite clamping jaw 12, however, is only in the region of a side surface 18 of the pressure piece 10 and this projecting in the direction of the mold 3, wherein the clamping claws 11, 12 and the pressure piece 10 transverse clamping screws 19 are in threaded engagement with the pressure piece 10 and thus a releasable mounting of the Forming tool 3 is achieved.

Die Ausbildung des Werkzeugadapters 8 sieht nunmehr eine elastisch rückstellbare, in Richtung der Längserstreckung des Druckbalkens 4 gemäß einem Doppelpfeil 20 mögliche Relativverstellung zwischen dem Aufnahmebereich 15 und dem Verbindungsbereich 16 vor. Dazu ist zwischen diesen Bereichen eine über eine gesamte Dicke 21 eines Klemmfortsatzes 22 und in etwa parallel zur Druckfläche 9 des Druckbalkens 4 verlaufende Materialdurchtrennung 23, z.B. Trennfuge 24, vorgesehen, die in Richtung einer Länge 25 des Werkzeugadapters 8 verläuft und in einem Seitenabstand 26 zu entgegengesetzten Stirnseitenflächen 27, 28 des Werkzeugadapters 8 in zu diesen Stirnseitenflächen 27, 28 parallel in Richtung der Werkzeugaufnahme 15 verlaufende Materialdurchtrennungen 29 übergeht. Damit werden längs den Stirnseitenflächen 27, 28 verlaufende Verbindungsstege 30, 31 geschaffen, die in Folge der Materialelastizität des Werkzeugadapters 8 eine federelastische Überbrückung zwischen dem Aufnahmebereich 15 und dem Verbindungsbereich 16 bilden. Ein in Richtung des Doppelpfeils 20 möglicher relativer Verstellweg zwischen dem Aufnahmebereich 15 und dem Verbindungsbereich 16 beträgt dabei maximal ein durch eine Fugenbreite 32 vorgegebenes Maß.The design of the tool adapter 8 now sees an elastically recoverable, in the direction the longitudinal extent of the pressure bar 4 according to a double arrow 20 possible relative adjustment between the receiving area 15 and the connecting area 16. To is between these areas one over an entire thickness 21 of a clamping extension 22 and in approximately parallel to the pressure surface 9 of the pressure bar 4 extending material separation 23, e.g. Parting line 24, provided, which extends in the direction of a length 25 of the tool adapter 8 and at a lateral distance 26 to opposite end faces 27, 28 of the tool adapter 8 in to these end faces 27, 28 parallel in the direction of the tool holder 15 extending material passages 29 passes. This will be along the end faces 27, 28 extending connecting webs 30, 31 created due to the material elasticity the tool adapter 8 a resilient bridging between the receiving area 15 and the connection area 16 form. One in the direction of the double arrow 20 possible relative displacement between the receiving area 15 and the connection area 16 is a maximum of a predetermined by a joint width 32 measure.

Dem Aufnahmebereich 15 zugewandte Endbereiche 33, 34 der längs der Stirnseitenflächen 27, 28 verlaufenden Materialdurchtrennungen 29 können verschiedentlich ausgeformt sein, um das Ausfeder- und Rückstellverhalten der Verbindungsstege 30, 31 zu erzielen. Die Verbindungsstege 30, 31 bilden durch die federelastischen Eigenschaften des Materials des Werkzeugadapters 8 Rückstellmittel 34, 35 aus, die einen Ausgleich der unterschiedlichen, bei Durchbiegung des Druckbalkens 3 bei einem Arbeitshub auftretenden Längendifferenzen und dabei verbundenen Verschiebewirkungen zwischen dem Druckbalken 3 und dem Werkzeugadapter 8 entgegenwirken und damit ein sogenanntes Wandern der Werkzeugadapter 8 längs der Druckfläche 9 wirkungsvoll verhindern.The receiving region 15 facing end portions 33, 34 along the end faces 27, 28 extending material passages 29 may be formed differently, to achieve the rebound and restoring behavior of the connecting webs 30, 31. The connecting bridges 30, 31 form by the elastic properties of the material of the Tool adapters 8 return means 34, 35, which compensate for the different, at deflection of the pressure bar 3 at a working stroke occurring differences in length and associated displacement effects between the pressure bar 3 and the tool adapter Counteract 8 and thus a so-called migration of the tool adapter. 8 effectively prevent along the pressure surface 9.

In der Fig. 3 ist eine andere Ausführung eines mit einem Rückstellmittel 36 ausgestatteten Werkzeugadapters 8 gezeigt. Nach dieser Ausbildung wirkt das Rückstellmittel 36 zwischen dem Werkzeugadapter 8 und dem Druckbalken 4. Im wesentlichen entspricht dabei der Werkzeugadapter 8 der Ausführung der bereits zuvor beschriebenen Figuren, wobei allerdings nach dieser Ausführung das Augenmerk darauf gelegt wird, daß bei einer durch die unterschiedlichen Biegelinien eintretenden Verschiebung des Werkzeugadapters 8 am Druckbalken 4 nach Beendigung des Druckhubes und damit der Durchbiegung durch die Rückstellmittel 36 eine Rückführung des Werkzeugadapters 8 am Druckbalken 4 in die Ursprungslage erfolgt. Dazu weisen der Werkzeugadapter 8 und/oder der Druckbalken 4 im Verbindungsbereich den Reibbeiwert mindernde Gleit- oder Rollmittel 37 auf. Im gezeigten Ausführungsbeispiel sind zwischen dem Werkzeugadapter 8 und dem Druckbalken 4 Wälzkörper vorgesehen, die eine Relativbewegung in Richtung der Längserstreckung des Druckbalkens 4 ermöglichen. Ebenso sind zwischen der Klemmleiste 7 und dem Druckbalken 4 eine derartige Relativbewegung zulassende Wälzkörper angeordnet. Die Befestigungselemente 17, mit denen die Klemmleiste 7 mit dem Werkzeugadapter 8 unter Zwischenschaltung der Wälzkörper befestigt sind und den Druckbalken 4 durchragt, wirken als Rückstellfedern 38. Bei einer Relativbewegung tritt eine Biegeverformung der Befestigungselemente 17 ein. Nach Wegfall der die Relativbewegung verursachenden Kraft tritt in Folge der Federelastizität ein Rückfedern in die ursprüngliche und gestreckte Lage ein, wodurch der Werkzeugadapter 8 in bezug auf den Druckbalken 4 in seine Ursprungslage zurückgeführt wird und damit ein kontinuierliches, mit jedem einzelnen Arbeitstakt verbundenes Wandern des Werkzeugadapters 8 unterbunden wird.In Fig. 3 is another embodiment of a equipped with a return means 36 Tool adapter 8 shown. After this training, the return means 36 acts between the tool adapter 8 and the pressure bar 4. Essentially corresponds to the tool adapter 8 of the execution of the previously described figures, although after this embodiment, the emphasis is placed on that at one by the different Bending lines occurring displacement of the tool adapter 8 on the pressure bar 4 after Termination of the pressure stroke and thus the deflection by the return means 36 a Return of the tool adapter 8 takes place on the pressure bar 4 in the original position. To have the tool adapter 8 and / or the pressure bar 4 in the connection area the coefficient of friction reducing sliding or rolling means 37. In the embodiment shown are between the tool adapter 8 and the pressure bar 4 rolling elements provided which a relative movement allow in the direction of the longitudinal extent of the pressure bar 4. As well are permitting such relative movement between the terminal block 7 and the pressure bar 4 Arranged rolling elements. The fastening elements 17, with which the terminal block. 7 are attached with the tool adapter 8 with the interposition of the rolling elements and the Push bar 4 projects through, acting as return springs 38. In a relative movement occurs Bending deformation of the fasteners 17 a. After elimination of the relative movement causing force occurs as a result of spring elasticity springback to the original and stretched position, whereby the tool adapter 8 with respect to the pressure bar 4 in its original position is traced back and thus a continuous, with each one Working cycle associated hiking of the tool adapter 8 is prevented.

Selbstverständlich sind auch weitere Mittel zur Verminderung des Reibbeiwertes zwischen dem Werkzeugadapter 8, der Klemmleiste 7 und dem Druckbalken 4 möglich. Beispielsweise ist eine Beschichtung der im Verbindungsbereich 16 miteinander in Reibschluß stehenden Oberflächen mit Kunststoffen, z.B. Teflon, möglich, das einen besonders geringen Reibbeiwert aufweist.Of course, other means for reducing the coefficient of friction between the tool adapter 8, the terminal block 7 and the pressure bar 4 possible. For example is a coating in the connecting region 16 with each other in frictional engagement Surfaces with plastics, e.g. Teflon, possible, the one very low coefficient of friction having.

Selbstverständlich sind anstelle der Wälzkörper im Verbindungsbereich 16 auch Kugelkörper anwendbar.Of course, instead of the rolling elements in the connecting region 16 and ball body applicable.

In der Fig. 4 ist eine andere Ausführung eines Rückstellmittels 39 zwischen dem Werkzeugadapter 8 und dem Druckbalken 4 zur Rückführung einer erfolgten Wanderbewegung zwischen dem Werkzeugadapter 8 und dem Druckbalken 4 gezeigt. Bei dieser Ausführung, bei der der Werkzeugadapter 8, wie bereits in den vorhergehenden Figuren beschrieben, ausgebildet ist, sind die Rückstellmittel 39 als zur Druckfläche 9 des Druckbalkens 4 in senkrechter Richtung zwischen dem Druckbalken 4 und dem Druckstück 10 eingesetzte, als Biegefedern, Stabfedern ausgebildete Stifte 40 vorgesehen, die bei einer Relativbewegung zwischen dem Druckbalken 4 und dem Druckstück 10 beim Auftreten einer Verschiebekraft eine Biegeverformung erfahren, wobei nach Wegfall der Verschiebekraft durch die Rückfederung eine Rückführung in die Ursprungsposition erfolgt. Aufnahmebohrungen 41, 42 im Druckbalken 4 und dem Druckstück 10 sind als abgesetzte Bohrungen ausgeführt, die eine Freistellung der Stifte 40 für eine Biegeverformung bewirken.In Fig. 4 is another embodiment of a return means 39 between the tool adapter 8 and the pressure bar 4 for returning a successful migration movement between the tool adapter 8 and the pressure bar 4 shown. In this version, at the tool adapter 8, as already described in the preceding figures, formed is, the return means 39 as the pressure surface 9 of the pressure bar 4 in vertical Direction between the pressure bar 4 and the pressure piece 10 used as bending springs, Bar springs formed pins 40 are provided, which in a relative movement between the Pressure bar 4 and the pressure piece 10 upon the occurrence of a displacement force bending deformation experienced, after elimination of the displacement force by the springback a Return to the original position. Receiving holes 41, 42 in the pressure bar. 4 and the pressure piece 10 are designed as stepped holes, an exemption of the Make pins 40 for a bending deformation.

Es ist aber auch möglich, die bzw. das Rückstellmittel 39 unmittelbar im Druckbalken anzuordnen und dieses direkt am Formwerkzeug 3 anwirken zu lassen, damit eine Relativbewegung, die das Formwerkzeug 3 durch die Biegeverformung des Druckbalkens 4 vollzieht, auszugleichen bzw. das Formwerkzeug 3 in seine Ausgangslage rückzuführen.But it is also possible to arrange the or the return means 39 directly in the pressure bar and let this act directly on the mold 3, so that a relative movement, which makes the mold 3 by the bending deformation of the pressure bar 4, compensate or return the mold 3 to its original position.

Der Ordnung halber sei abschließend darauf hingewiesen, daß zum besseren Verständnis der Werkzeughaltevorrichtung 1 diese bzw. deren Bestandteile teilweise unmaßstäblich und/oder vergrößert und/oder verkleinert dargestellt wurden.For the sake of order, it should be pointed out that for a better understanding of the Tool holder 1 these or their components partly unmaßstäblich and / or enlarged and / or reduced displayed.

Die den eigenständigen erfinderischen Lösungen zugrundeliegende Aufgabe kann der Beschreibung entnommen werden.The task underlying the independent inventive solutions can the description be removed.

Claims (14)

  1. Tool-clamping device (2) for a shaping tool (3), especially for a press brake, bending die, on a compression beam (4), in particular an edging press (5), with a tool adapter (8) attached to the compression beam (4) designed to releasably hold the forming tool (3), characterised in that at least one resiliently elastic return means (34, 35, 36, 39) is provided between a receiving region (15) of the tool adapter (8) for the forming tool (3) and a connecting region (16) of the tool adapter (8) with the compression beam (4) or between the compression beam (4) and the tool adapter (8) and forming tool (3) to counteract a relative displacement between the tool adapter (8) and forming tool (3) and the compression beam (4) in the direction of a longitudinal extension.
  2. Tool-clamping device as claimed in claim 1, characterised in that the return means (34, 35) is provided by means of at least one resilient elastic connecting web (30, 31) disposed between the receiving region (15) and the connecting region (16) of the tool adapter (8).
  3. Tool-clamping device as claimed in claim 2, characterised in that the connecting web (30, 31) is integrally joined to the receiving region (15) and the connecting region (16) of the tool adapter (8) and is provided in the form of a material split (23, 29) in the tool adapter (8), in particular a parting line (24) extending in certain regions.
  4. Tool-clamping device as claimed in one or more of the preceding claims, characterised in that the tool adapter (8) has two connecting webs (30, 31) extending along terminal end faces (27, 28) linking the receiving region (15) to the connecting region (16).
  5. Tool-clamping device as claimed in claim 3, characterised in that the material split (23, 29) or parting line (24) extends in a substantially U-shaped arrangement, a material split (23) constituting a base extending adjacent to and substantially parallel with the connecting region (16), after which material splits forming legs extend perpendicular thereto and substantially parallel with the side faces (27, 28) of the tool adapter (8).
  6. Tool-clamping device as claimed in claim 5, characterised in that end regions (33) of the material splits (29) constituting the legs form parting lines extending at an angle to one another.
  7. Tool-clamping device as claimed in one or more of the preceding claims, characterised in that the tool adapter (8) is held on a side face (6) of the compression beam (4) by means of a clamping block (7).
  8. Tool-clamping device as claimed in one or more of the preceding claims, characterised in that sliding or rolling means (37) which reduce the friction value are disposed in the connecting region (16) of the tool adapter (8) and the compression beam (4).
  9. Tool-clamping device as claimed in claim 7, characterised in that sliding or rolling means (37) which reduce the friction value are disposed between a clamping surface of the clamping block (7) and the compression beam (4).
  10. Tool-clamping device as claimed in claim 8, characterised in that the sliding or rolling means (37) are provided in the form of a layer of synthetic material on the connecting region of the tool adapter (8) and the clamping surface of the clamping block (7) or the surface (6) of the compression beam (4).
  11. Tool-clamping device as claimed in claim 8, characterised in that the sliding or rolling means (37) are provided in the form of rolling elements (37) provided in the connecting region (16) and for the clamping surface.
  12. Tool-clamping device as claimed in claim 1, characterised in that the resiliently elastic return means (36) are provided in the form of fixing elements (17), in particular clamping screws (19).
  13. Tool-clamping device as claimed in claim 1, characterised in that the return means (38) are provided in the form of pins (40) between the tool adapter (8) and the compression beam (4) acting as rod springs.
  14. Tool-clamping device as claimed in claim 1, characterised in that the receiving region (15) with the connecting region (16) has a web link between the receiving region (15) and the connecting region (16) in the form of material splits meandering in the direction of the longitudinal extension.
EP01953656A 2000-08-14 2001-07-25 Tool clamping device for a shaping tool, especially for a press brake Expired - Lifetime EP1311355B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT01953656T ATE305830T1 (en) 2000-08-14 2001-07-25 TOOL CLAMPING DEVICE FOR A MOLDING TOOL, IN PARTICULAR A PRESS BRAKE

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0139900A AT408729B (en) 2000-08-14 2000-08-14 TOOL CLAMPING DEVICE FOR A MOLDING TOOL, IN PARTICULAR A BENDING PRESS
AT13992000 2000-08-14
PCT/AT2001/000254 WO2002013985A1 (en) 2000-08-14 2001-07-25 Tool clamping device for a shaping tool, especially for a press brake

Publications (2)

Publication Number Publication Date
EP1311355A1 EP1311355A1 (en) 2003-05-21
EP1311355B1 true EP1311355B1 (en) 2005-10-05

Family

ID=3688190

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01953656A Expired - Lifetime EP1311355B1 (en) 2000-08-14 2001-07-25 Tool clamping device for a shaping tool, especially for a press brake

Country Status (8)

Country Link
US (1) US6782729B2 (en)
EP (1) EP1311355B1 (en)
JP (1) JP4980545B2 (en)
CN (1) CN1216701C (en)
AT (1) AT408729B (en)
AU (1) AU2001276147A1 (en)
DE (1) DE50107629D1 (en)
WO (1) WO2002013985A1 (en)

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US7021116B2 (en) * 2003-12-19 2006-04-04 Wilson Tool International, Inc. Press brake tooling technology
US7721586B2 (en) 2005-02-08 2010-05-25 Wilson Tool International Inc. Press brake tool seating technology
JP5631149B2 (en) * 2010-10-19 2014-11-26 株式会社アマダ Upper mold holder device
CN102078893B (en) * 2010-11-15 2012-10-10 陕西飞机工业（集团）有限公司 S-shaped section molding process equipment
US9566632B1 (en) 2015-09-08 2017-02-14 Con-Tech Manufacturing, Inc. Shaping tool die
NL2018393B1 (en) * 2017-02-20 2018-09-17 Wila Bv Device for clamping a tool and method for manufacturing such a device
CN107971447A (en) * 2017-09-06 2018-05-01 合肥常青机械股份有限公司 A kind of truck chassis clamp device for riveting transverse beam
CN109433867B (en) * 2018-10-12 2023-08-22 中信国安建工集团有限公司 Building fastener bending equipment and using method
EP4180140A1 (en) * 2021-11-16 2023-05-17 Bystronic Laser AG Bending machine

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FR1240703A (en) * 1959-07-31 1960-09-09 Achard Improvements to folding presses
FR2540756A1 (en) * 1983-02-15 1984-08-17 Promecan Sisson Lehmann ADAPTER DEVICE FOR MOUNTING FOLDING PUNCHES ON A FOLDING PRESS
US4620435A (en) * 1984-10-24 1986-11-04 Cincinnati Incorporated Deflection compensating assembly for fabricating machine tools
NL8802402A (en) * 1988-09-29 1990-04-17 Wila Maschf Bv CLAMP DEVICE, EG. FOR THE UPPER TOOL OF A PRESS BRAKE.
US5065610A (en) * 1990-03-12 1991-11-19 Kabushiki Kaisha Kosmek Clamping apparatus for press brake
NL9100034A (en) * 1991-01-10 1992-08-03 Wila Maschf Bv PRESS BRAKE TOOL, AND AN ADAPTER AND A BRAKE PRESS FOR IT.
JPH06262263A (en) * 1993-03-15 1994-09-20 Yazaki Corp Device for clamping press brake upper die
JP2971013B2 (en) * 1995-10-23 1999-11-02 株式会社アマダ Upper die device in bending machine
DE19546969A1 (en) * 1995-12-15 1997-06-19 Amada Gmbh Quick clamping device for at least one tool of a processing machine
US6003360A (en) * 1997-07-01 1999-12-21 Wilson Tool International, Inc. Press brake tool holder
IT1298501B1 (en) * 1998-01-28 2000-01-12 Tecnostamp S R L BENDING PRESSES JAW DRIVE SYSTEM
IT1311880B1 (en) * 1999-11-30 2002-03-19 Luciano Gasparini SUPPORT AND LOCKING DEVICE WITH SAFETY FUNCTION AT LEAST ONE INTERCHANGEABLE TOOL, PARTICULARLY IN A MACHINE
US6564611B2 (en) * 2001-07-30 2003-05-20 Wilson Tool International, Inc. Hydraulic press brake tool holder

Also Published As

Publication number Publication date
US6782729B2 (en) 2004-08-31
US20030221476A1 (en) 2003-12-04
CN1216701C (en) 2005-08-31
WO2002013985A8 (en) 2002-05-02
CN1447723A (en) 2003-10-08
ATA13992000A (en) 2001-07-15
AU2001276147A1 (en) 2002-02-25
WO2002013985A1 (en) 2002-02-21
JP4980545B2 (en) 2012-07-18
AT408729B (en) 2002-02-25
JP2004504948A (en) 2004-02-19
EP1311355A1 (en) 2003-05-21
DE50107629D1 (en) 2005-11-10

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