EP0242309B1 - Biegepresse mit Schwenkbalken - Google Patents

Biegepresse mit Schwenkbalken Download PDF

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Publication number
EP0242309B1
EP0242309B1 EP87420097A EP87420097A EP0242309B1 EP 0242309 B1 EP0242309 B1 EP 0242309B1 EP 87420097 A EP87420097 A EP 87420097A EP 87420097 A EP87420097 A EP 87420097A EP 0242309 B1 EP0242309 B1 EP 0242309B1
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EP
European Patent Office
Prior art keywords
frame
pivots
screw
fixed
active face
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
Application number
EP87420097A
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English (en)
French (fr)
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EP0242309A1 (de
Inventor
Pierre Favrin
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Individual
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Individual
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Publication date
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Priority to AT87420097T priority Critical patent/ATE51777T1/de
Publication of EP0242309A1 publication Critical patent/EP0242309A1/de
Application granted granted Critical
Publication of EP0242309B1 publication Critical patent/EP0242309B1/de
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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
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • B21D5/042—With a rotational movement of the bending blade

Definitions

  • the present invention relates to a press brake with pivoting apron, that is to say a press brake of the type comprising a fixed table carried by a frame and a pivoting apron carried by two lateral arms articulated on two horizontal doaxial pins supported by sliders. movable in synchronism in slides carried by the frame, the active face of the deck being that framed by the lateral arms and oriented towards the pins of the latter.
  • the deck rotates around a folding axis by winding the sheet around a cylinder centered on this axis and of determined radius.
  • the present invention aims to remedy these drawbacks by providing a press brake which not only requires only one position adjustment, but which also has the advantage of being easily adaptable to a programmed command or digital command. .
  • this additional variable may have the disadvantage of complicating the calculation of the determination of the position of the slides for each new folding operation, in particular if the press brake is equipped with adjustment means with manual control, but, on the other hand, in the case of an automatic press brake with programmed control, this operating mode has the advantage of greater speed and greater precision than with traditional press brakes.
  • the press according to the invention has, moreover, the advantage of making it possible not only to bend sheets of variable thicknesses without complicated adjustment, but also to make back bends, that is to say that is, in the opposite direction, without having to turn the sheet over.
  • the press brake with pivoting apron of the invention comprises, like traditional press brakes of this type, a fixed horizontal table 2 disposed between the two lateral uprights 3 of a frame which supports it, between which is mounted, so as to be able slide vertically above the table 2, a sheet clamp 4 guided by vertical slides 5 arranged on the opposite faces of the uprights 3 of the frame.
  • the latter also support the pins 6, coaxial and of common horizontal axis 6a, of two lateral arms 7 supporting the pivoting deck 8.
  • the active face 8a of this deck 8, which is the one framed by the two lateral arms 7, is normally located in the same horizontal plane as the upper face 2b of the table 2 when the deck 8 is in the starting position.
  • the front edge 4a of the sheet clamp 4 is also constituted by an insert and interchangeable.
  • the position of the pins 6 depends, on the one hand, on the radius of curvature of the desired folding and, on the other hand, on the thickness of the sheet to be folded and, for this reason, the pins 6 are mounted on sliders 12 capable of being moved in synchronism and on strictly equal strokes.
  • Each slide 13 of a slide 12 is further arranged so that, in one of the extreme positions of the slides 12, the edges 2a of the table 2 and 8b of the active face 8a of the deck 8 are practically coincident with each other and with the common axis 6a of the pins 6, as appears from the examination of FIG. 1.
  • this press brake requires only a single adjustment operation which consists in moving the sliders 12 so as to bring the common axis 6a of the pins 6 into the position imposed by the desired shape of the folding.
  • Figures 2 to 4 illustrate three operations of different bending of a sheet 14 of the same thickness, the angular stroke a of the pivoting apron 8 being, respectively, 60 ° , 90 ° and 120 °
  • Figure 5 is a figure similar to Figures 2 to 4 but supplemented by the means for adjusting the position of the corresponding slide 12 and these adjusting means comprise a safety device described below.
  • Each slide 12 is linked axially to a screw 15 engaged in a nut 16 secured to the frame 3.
  • a safety wedge 18 is interposed between the rear face 16a of the nut 16 by which it bears against the frame 3 and the opposite face 3a of the latter serving as its support.
  • this safety wedge 18 is of annular shape and it has, on each of its lateral faces, a weakening groove also annular 19 dividing it into two concentric annular parts, the inner one 18a and the other exterior 18b.
  • This arrangement has the effect that, in the case where the force acting in the direction of the arrow 17 on the screw 15 and the nut 16 exceeds a predetermined threshold, the two concentric parts 18a and 18b of the safety wedge 18, are separated by shearing, which allows the nut 16 and the screw 15 to recede over a stroke a equal to the length of the cylindrical recess 21.
  • This recoil stroke of the screw 15 has the immediate effect of decreasing considerably the value of the force acting in the direction of the arrow 17 on the screw 15 and consequently eliminating any risk of rupture of the screw 15 and the nut 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)
  • Sheet Holders (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Soil Working Implements (AREA)
  • Glass Compositions (AREA)
  • Forging (AREA)

Claims (2)

1. Biegepresse mit Schwenkbalken, umfassend einen durch einen Rahmen (3) getragenen festen Tisch (2) und einen Schwenkbalken (8), der durch zwei seitliche Arme (7) gehalten ist, die auf zwei koaxialen, sich horizontal erstreckenden Lagerzapfen (6) gelenkig gelagert sind, wobei die Lagerzapfen (6) durch synchron bewegliche Schlitten (12) gehalten sind, die in vom Rahmen (3) getragene Führungen geführt sind, wobei die wirksame Fläche (8a) des Balkens (8) durch die Seitenarme (7) eingerahmt und in Richtung auf die Lagerzapfen (6) ausgerichtet ist, wobei weiter der Schwenkbalken (8) starr an seinen seitlichen Tragarmen (7) so angebracht ist, daß sich in einer Startstellung seine wirksame Fläche (8a) in der gleichen horizontalen Ebene befindet wie die gemeinsame Achse (6a) der Lagerzapfen (6) und daß diese Achse (6a) stets in der gleichen horizontalen Ebene, wie die obere Fläche (2b) des Tisches (2) und mit einem bestimmten Abstand (X) zu dem vertikalen Rand des Tisches (2) angeordnet ist, dadurch gekennzeichnet, daß die Führungen (13) der die Lagerzapfen (6) zum Verschwenken der Tragarme (7) des Balkens (8) tragenden Schlitten (12) horizontal angeordnet sind und zwar derart, daß die Kante (8b) der wirksamen Fläche (8a) des Balkens (8), die diejenige ist, die dem Tisch (2) am nächsten ist, wenn sich der Balken (8) in seiner Startstellung befindet, mit der gemeinsamen Achse (6a) der Lagerzapfen (6) zusammenfällt, wobei eine der Endstellungen der Schlitten (12) mit den beiden Kanten (2a, 8b) des festen Tisches und der wirksamen Fläche (8a) des Balkens (8) und infolgedessen mit der gemeinsamen Achse (6a) der Lagerzapfen (6) zusammenfällt, daß der Schlitten (12) jedes in seiner horizontalen Führung (13) beweglichen Lagerzapfens (6) axial mit einer horizontalen Stellschraube (15) verbunden ist, die durch die Mutter (16) getragen ist, die normalerweise fest an dem Rahmen (3) der Presse angebracht ist, wobei manuelle Mittel oder automatische Steuermotoren vorgesehen sind, um den Synchron-Drehantrieb für die beiden Schlitten (12) zu ermöglichen, daß die Fläche (16a) der an dem Rahmen (3) fest angebrachten Mutter (16), die zu der Endseite der Schraube (15) weist, die mit dem entsprechenden Schlitten (12) verbunden ist, sich gegen den Rahmen (3) durch Zwischenschaltung eines Sicherungsfutters (18) abstützt, das geeignet ist, durch Scherung nachzugeben und ein Zurückweichen der Mutter (16) und der Schraube (15) zu ermöglichen, wenn die vorherigen Kräfte einen vorbestimmten Wert übersteigen, und daß das Sicherungsfutter (18) durch eine die Schraube (15) der festen Mutter (16) umgebende Scheibe gebildet ist, die auf wenigstens einer ihrer Seiten eine ringförmige Schwächungsvertiefung (19) aufweist, die diese in zwei ringförmige, konzentrische Teile (18a, 18b) aufteilt, die durch eine Scherung trennbar sind und von denen eine (18b) sich gegen den Rahmen (3) abstützt, während sich die feste Mutter (16) gegen den anderen Teil (18a) abstützt.
2. Verfahren zur Verwendung einer Biegepresse nach Anspruch 1, dadurch gekennzeichnet, daß während des Biegens die Stellung der gemeinsamen Achse (6a) der Schwenkzapfen (6) der Tragarme (7) des Schwenkbalkens (8) durch die Gleichung bestimmt ist:
Figure imgb0005
wobei
- X der Abstand der vorerwähnten Kanten (2a, 8b) des festen Tisches (2) und der wirksamen Seite (8a) des Schwenkbalkens (8),
- Ri der innere Krümmungsradius des gebogenen Bleches am Ende des Biegevorganges,
- e die Dicke des Bleches und
- a der durch den Schwenkbalken (8) während des Biegevorganges bewirkten Drehwinkels ist, der durch den Winkel bestimmt ist, um welchen das Blech gebogen werden soll.
EP87420097A 1986-04-16 1987-04-13 Biegepresse mit Schwenkbalken Expired - Lifetime EP0242309B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87420097T ATE51777T1 (de) 1986-04-16 1987-04-13 Biegepresse mit schwenkbalken.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8605981A FR2597398B1 (fr) 1986-04-16 1986-04-16 Presse plieuse a tablier pivotant
FR8605981 1986-04-16

Publications (2)

Publication Number Publication Date
EP0242309A1 EP0242309A1 (de) 1987-10-21
EP0242309B1 true EP0242309B1 (de) 1990-04-11

Family

ID=9334598

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87420097A Expired - Lifetime EP0242309B1 (de) 1986-04-16 1987-04-13 Biegepresse mit Schwenkbalken

Country Status (7)

Country Link
US (1) US4768367A (de)
EP (1) EP0242309B1 (de)
AT (1) ATE51777T1 (de)
DE (1) DE3762190D1 (de)
ES (1) ES2014033B3 (de)
FR (1) FR2597398B1 (de)
GR (1) GR3000433T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108714637A (zh) * 2018-03-29 2018-10-30 苏州赛腾精密电子股份有限公司 一种适用于自动化设备的折料装置

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3739173A1 (de) * 1987-11-19 1989-06-01 Feintool Int Holding Verfahren und vorrichtung zum biegen von werkstuecken
DE3935658A1 (de) * 1989-10-26 1991-05-02 Reinhardt Gmbh Maschbau Verfahren zum gegenlaeufigen biegen eines bleches
US5259231A (en) * 1989-10-26 1993-11-09 Reinhardt Maschinenbau Gmbh Process for the two-directional bending of sheet metal
DE3935659C3 (de) * 1989-10-26 1997-01-02 Reinhardt Gmbh Maschbau Vorrichtung zum Biegen eines Bleches
FR2667520A1 (fr) * 1990-10-05 1992-04-10 Guillaume Bernard Presse plieuse a tablier articule par une charniere.
DE19523226A1 (de) * 1995-06-27 1995-12-14 Joachim Linde Verfahren und Vorrichtung zum Biegen von Blechen
DE19844244A1 (de) * 1998-09-26 2000-03-30 Fastenrath Fasti Werk Vorrichtung zum Biegen von Blechen
DE10245777A1 (de) * 2002-09-26 2004-04-08 Reinhardt Maschinenbau Gmbh Biegemaschine
US7228721B2 (en) 2003-01-17 2007-06-12 Tapco International Corporation Pivot link for sheet bending brake and sheet bending brake including pivot link
US6988323B2 (en) * 2003-06-10 2006-01-24 Mcadam Perry Tool kit and method for working sheet metal trims
DE102006003500B3 (de) * 2006-01-24 2007-08-16 Ralf Beger Blechabkantvorrichtung
DE102008064227B3 (de) * 2008-12-22 2010-05-27 Ralf Beger Verfahren zum Abkanten eines Blechteils in einer Blechabkantvorrichtung und zur Durchführung dieses Verfahrens geeignete Blechabkantvorrichtung zum Abkanten eines Blechteils
CN106001195B (zh) * 2016-05-25 2018-05-29 广西田阳至恒门业有限公司 折弯机
DE102018000971B3 (de) 2018-02-02 2019-03-07 Gustav-Adolf Hochstrate Schwenkbiegemaschine mit Verstellung der Schwenkachse der Biegewange

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE584362C (de) * 1933-09-19 Hiltmann & Lorenz Akt Ges Masc Biegewange fuer Abkantmaschinen
US1194602A (en) * 1916-08-15 Mechanism
CA469946A (en) * 1950-12-12 Anderson Frohman Apparatus and methods for working sheet metal
DE303138C (de) *
FR1040494A (fr) * 1951-08-10 1953-10-15 Machine à plier des parois en tôle et matériau similaire
GB951895A (en) * 1962-01-30 1964-03-11 Oliver Machinery Co Improvements relating to folder brakes for forming corners in sheet material
FR1454083A (fr) * 1965-10-22 1966-07-22 Plamag Plauener Druckmaschinen Dispositif pour le cintrage de clichés et plaques d'impression
FR2502518A1 (fr) * 1981-03-26 1982-10-01 Favrin Pierre Machine pour le pliage de toles en aller et retour sur plieuse
FR2509204A1 (fr) * 1981-07-07 1983-01-14 Jouanel Sa Ets Y Plieuse automatique de toles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108714637A (zh) * 2018-03-29 2018-10-30 苏州赛腾精密电子股份有限公司 一种适用于自动化设备的折料装置
CN108714637B (zh) * 2018-03-29 2019-11-19 苏州赛腾精密电子股份有限公司 一种适用于自动化设备的折料装置

Also Published As

Publication number Publication date
US4768367A (en) 1988-09-06
ES2014033B3 (es) 1990-06-16
FR2597398A1 (fr) 1987-10-23
FR2597398B1 (fr) 1990-12-07
DE3762190D1 (de) 1990-05-17
EP0242309A1 (de) 1987-10-21
ATE51777T1 (de) 1990-04-15
GR3000433T3 (en) 1991-06-28

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