EP0921874B1 - Verbesserte biegevorrichtung für metallbearbeitungsverfahren - Google Patents

Verbesserte biegevorrichtung für metallbearbeitungsverfahren Download PDF

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Publication number
EP0921874B1
EP0921874B1 EP97935746A EP97935746A EP0921874B1 EP 0921874 B1 EP0921874 B1 EP 0921874B1 EP 97935746 A EP97935746 A EP 97935746A EP 97935746 A EP97935746 A EP 97935746A EP 0921874 B1 EP0921874 B1 EP 0921874B1
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EP
European Patent Office
Prior art keywords
jacket
pressing machine
crosspiece
shoulder
bending
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97935746A
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English (en)
French (fr)
Other versions
EP0921874A1 (de
Inventor
Luciano Gasparini
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Individual
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Individual
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Filing date
Publication date
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Publication of EP0921874A1 publication Critical patent/EP0921874A1/de
Application granted granted Critical
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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
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means

Definitions

  • This invention has for object an improved bending pressing machine, particularly in metal working processes.
  • the innovation finds particular even if not exclusive application in the metal working industry.
  • a so called bending cycle consists essentially of the vertical descent of a tool until touching the underlying sheet foil, in carrying out the bending, and then, at the end, going back up to reach the starting position.
  • the machine is made up of two parts, respectively a first dynamic one, generally regarding the upper part, and a static part, making up the underside of the machine placed on the perpendicular of the dynamic part.
  • the tool made up of a blade differently formed also of the interchangeable type, exclusively effects a vertical to and fro movement on axis Y-Y', said movement being ensured by at least two oleodynamic cylinders of which one for each part, which determine the descent, the eventual stop, and the ascent of an upper crosspiece which longitudinally supports the tool.
  • each cylinder group of a traditional bending pressing machine is literally joined to the frame or static body of the machine, during the preassembly phase of same and in this particular case each with a corresponding side shoulder of the frame of the pressing machine, by using a series of robust screws.
  • the forces exerted by the pressing machine are high and innumerable, some of these concern by reflex mainly the cylinder-pressing machine connecting point, reason why it is considered a very critical part, which requires particular care in the realization.
  • the realization of a specular cavity on both surfaces is provided, respectively on one side of the shoulder and on the other on the jacket of the cylinder, in such a way to allow the housing of a spline or transversal key.
  • the structure of the cylinder it is a traditional one and includes a jacket engaged to the shoulder, of the type obtained by a casting of cast iron closed on the ends on one side by a sealing flange, on the other by a block provided with means for the feeding of the cylinder.
  • a jacket engaged to the shoulder of the type obtained by a casting of cast iron closed on the ends on one side by a sealing flange, on the other by a block provided with means for the feeding of the cylinder.
  • Coaxially to the jacket there is the known shaft, whose end, engages steadily one side of said crosspiece and which in turn supports the tool.
  • the crosspiece is presently of the type guided on both sides, a reciprocal, guide means being provided, which interferes with the same.
  • a guide is engaged on the top and perpendicularly, by screw means, provided on both sides with a surface with low friction coefficient, as for example a nylon interchangeable small block or other.
  • An object of this invention is that of avoiding the above-mentioned drawbacks.
  • a third advantage relates to the encumbrances, which are substantially reduced because of the small size of the cylinder, and of its integration in the machine body.
  • Another advantage, more properly of the cylinder relates to the fact that melting risks of the external jacket are avoided, while concerning the use of the internal jacket that is of the interchangeable type, it has a high maintenance simplicity in general. Such intervention simplicity is due also to the fact of involving the use of articles commonly available on the market, it results also a discreet flexibility in case in which is necessary to change the piston stroke.
  • Figure 1 represents a sectional longitudinal view of the cylinder group of which in Figure 2, seen along the axis X-X.
  • Figure 2. represents a plan-view of a cylinder group for bending pressing machines.
  • Figure 3 is a prospect of the upper crosspiece assembly, including on one side one cylinder group as well as some guiding means of said crosspiece.
  • Figure 4. represents a plan-view of the assembly shown in the previous Figure.
  • Figure 5. represents a sectional view on longitudinal level of a cylinder group and of the guides for bending pressing machines.
  • a bending pressing machine (A) consists of an upper and of a lower part, the first essentially dynamic with respect to the second static one.
  • An upper crosspiece (1) is part of the first one, vertically movable along the Y-Y' axis in respect to the frame (a) of the bending pressing machine, on whose lower end a tool (2) of the interchangeable type is provided associated longitudinally.
  • the body of the machine (A) provides on the ends, a cylinder group for each side, preferably of the double-action type, which determines the descent and vice versa movement along the Y-Y' axis, of the upper crosspiece (1).
  • Each cylinder group is essentially made up of two heads, respectively a higher one (3) and a lower one (4), which hold a first jacket, external, (5). Both said heads (3, 4) and the jacket (5), are steadily welded to the corresponding side shoulder (a') of the frame (a) of the pressing machine (A).
  • the first ones this is made possible by a specific shape of these same, providing besides the technical part for housing the ends of the jackets (5, 7) as well as the relative gaskets, an extension fork (3', 4'). These, have the same thickness as the corresponding heads (3, 4), and each one is disposed on both sides of said shoulder (a').
  • the upper side of the head (3) includes means (6, 6') for the joining to the feeding system, the underlying part realizes suitable seat jackets, a first external (5) and a second internal (7) or interchangeable liner, being coaxial to said first one.
  • the first jacket (5) is closed on one side by upper head (3), while on the other side by the lower head (4), both immovable, allowing the welding to the shoulder (a') also of said first jacket (5).
  • the second jacket, or internal liner (7) it can be noticed that it is of the interchangeable type. This is made possible by a flange (8), substantially removable from the lower head (4), thus making it possible to remove both the shaft (9) of the double-action cylinder, and the internal jacket (7).
  • a further characteristic, noticeable in the head (3) is the presence of a feeding duct (14), which communicates with an interspace (15) noticeable between the first jacket (5) and the second (7), said duct (14) by feeding means (6') having the function of allowing the return towards the top of the shaft (9).
  • At least one of said heads (3, 4) of the cylinder group, for each side of the pressing machine (A), in particular the lower head (4), provides, in this case orthogonal to the previous one, a second fork (10) (see. Fig. 4) which must guide the perpendicular movement of a side end of the upper crosspiece (1).
  • Said second guide fork (10) provides on the internal and opposed faces, the association of two interchangeable sliding blocks (11), with low frictional coefficient.
  • second guiding means include essentially a plate (12), orthogonally engaged in respect to the shoulder (a'), which supports on both sliding sides two sliding blocks (12') also with low frictional coefficient.
  • the section (13') of the gib (13) shaped like an "L" is superimposed, and which is associated by common screw means directly to the crosspiece (1).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Press Drives And Press Lines (AREA)

Claims (7)

  1. Eine Druck-Biegemaschine, besonders zur Metallverarbeitung, mit einer Schulter (a'), die eine Umhüllung (7) stützt, die als Sitz für Zylindermittel (9) mit Querträger (1) dient, der seinerseits eine dynamisch reziprokes Biegewerkzeug stützt (2); besagte Umhüllung (7) ist ausziehbar in einer äußeren zylindrischen Umhüllung (5) untergebracht, die an besagte Schulter geschweisst ist (a') und einen ausbaubaren unteren Flansch (8) aufweist; wobei seitlich zu dem Querträger (1) zur Stützung des besagten Biegewerkzeugs (2) mindestens zwei Führungspunkte vorgesehen sind, und zwar ein erster für das obere Teil des Querträgers (1) und ein zweiter unter dem ersten, entlang besagtem Querträger (1) in einer Zwischenposition;
    gekennzeichnet dadurch, dass besagte äußere zylindrische Umhüllung (5) zum Stützen von besagter Umhüllung (7) im wesentlichen zwei Köpfe (3, 4) umfasst, und zwar einen unteren und einen oberen, wobei die äußere Umhüllung (5) zwischen besagten Köpfen (3, 4) gehalten wird, wobei die Köpfe seitlich an die Schulter (a') des Rahmens (a) von besagter Drückmaschine (A) geschweißt sind; der obere Kopf (3) besitzt Mittel (6, 6) für den Anschluss von Zufuhrmitteln für die Umhüllung (7), und der untere Kopf (4) stützt den entfernbaren Flansch (8), der das Herausziehen der austauschbaren inneren Umhüllung (7) ermöglicht, in der das besagte Zylindermittel (9) untergebracht ist; die innere Umhüllung (7) wird zwischen dem oberen Kopf (3) und dem Flansch gehalten (8).
  2. Druck-Biegemaschine nach Anspruch 1, gekennzeichnet dadurch, dass auf beiden Seiten des besagten Querträgers (1) zur Stütze des Werkzeugs (2) mindestens zwei Führungspunkte vorgesehen sind, und zwar ein erster für das obere Teil des Querträgers (1) und ein zweiter unter dem ersten, entlang des Querträgers (1) in einer Zwischenposition; besagtes erstes Führungsmittel, [ist] aus einer gabelartigen Form (10) erhalten, die aus einem der beiden Köpfe (4) erhalten ist, die den Zylinder bilden; während zweite Mittel durch Eingreifen eine Führung (12) von oben und senkrecht in die Schulter (a') der Drückmaschine (A) erhalten werden, über welcher Führung ein Teil einer Stelleiste (13) liegt, die ihrerseits mit dem entsprechenden Ende des Werkzeugträger-Querträgers (1) verbunden ist.
  3. Druck-Biegemaschine nach Anspruch 1. und 2., gekennzeichnet dadurch, dass jeder Kopf, also der obere (3) und der untere (4), die an die entsprechende Seitenschulter (a') des Rahmens (a) der Drückmaschine (A) geschweißt sind, eine Verlängerungsgabel (3, 4) aufweisen, die beide Seiten besagter Schulter (a') umgreift.
  4. Druck-Biegemaschine gemäß den vorausgehenden Patentansprüchen, gekennzeichnet dadurch, dass die obere Seite des oberen Kopfs (3) Mittel (6, 6) zum Anschluss an das Zuführungssystem aufweist, und das untere Teil Aufnahmen bildet, um nach Einsetzung geeigneter Dichtungen die Enden der koaxialen äußeren (5) und inneren (7) Umhüllung unterzubringen.
  5. Druck-Biegemaschine gemäß den vorausgehenden Patentansprüchen, gekennzeichnet dadurch, dass die äußere Umhüllung (5) auf einer Seite durch den oberen Kopf (3) abgeschlossen ist und auf der anderen Seite durch den unteren Kopf (4), beide unbeweglich, was das Schweißen von besagter äußerer Umhüllung (5) an die Schulter (a') ermöglicht.
  6. Druck-Biegemaschine gemäß den vorausgehenden Patentansprüchen, gekennzeichnet dadurch, dass die innere Umhüllung (7) austauschbar ist und einen ausbaubaren Flansch (8) aufweist, der in Eingriff mit dem unteren Kopf (4) steht.
  7. Druck-Biegemaschine gemäß den vorausgehenden Patentansprüchen, gekennzeichnet dadurch, dass in dem oberen Kopf (3) eine Zufuhrleitung (14) vorhanden ist, die mit einem Zwischenraum (15) zwischen der äußeren (5) und der inneren Umhüllung (7) in Verbindung steht und mit einigen Zufuhrmitteln (6) verbunden ist.
EP97935746A 1996-07-26 1997-07-23 Verbesserte biegevorrichtung für metallbearbeitungsverfahren Expired - Lifetime EP0921874B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT96TV000098A IT1288646B1 (it) 1996-07-26 1996-07-26 Macchina pressa piegatrice perfezionata, particolarmente nei processi di lavorazione del metallo.
ITTV960098 1996-07-26
PCT/IT1997/000182 WO1998004368A1 (en) 1996-07-26 1997-07-23 Improved bending pressing machine, particularly in the processes of metal working

Publications (2)

Publication Number Publication Date
EP0921874A1 EP0921874A1 (de) 1999-06-16
EP0921874B1 true EP0921874B1 (de) 2000-02-16

Family

ID=11419977

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97935746A Expired - Lifetime EP0921874B1 (de) 1996-07-26 1997-07-23 Verbesserte biegevorrichtung für metallbearbeitungsverfahren

Country Status (8)

Country Link
EP (1) EP0921874B1 (de)
JP (1) JP2000515814A (de)
CN (1) CN1226192A (de)
AR (1) AR008009A1 (de)
AT (1) ATE189780T1 (de)
DE (1) DE69701315D1 (de)
IT (1) IT1288646B1 (de)
WO (1) WO1998004368A1 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1812982A (en) * 1929-12-13 1931-07-07 Rafter Machine Company Machine for bending sheet metal shapes
FR1236985A (fr) * 1958-10-03 1960-07-22 Machine à plier les tôles, à éléments de guidage auxiliaires
GB1005114A (en) * 1963-08-09 1965-09-22 Steel Construction & Eng Co Improvements in or relating to hydraulically-operated press brakes or guillotines
US3282076A (en) * 1963-12-20 1966-11-01 Laval Turbine Brakes for forming plate or sheet workpieces
FR1517000A (fr) * 1967-01-31 1968-02-05 Perfectionnements aux vérins hydrauliques en vue, notamment, de leur application àdes presses ou machines analogues
DE2344432A1 (de) * 1972-10-06 1974-04-11 Verrina Spa Abkantpresse mit hydraulischem oberantrieb

Also Published As

Publication number Publication date
ITTV960098A1 (it) 1998-01-26
AR008009A1 (es) 1999-11-24
EP0921874A1 (de) 1999-06-16
IT1288646B1 (it) 1998-09-23
WO1998004368A1 (en) 1998-02-05
JP2000515814A (ja) 2000-11-28
CN1226192A (zh) 1999-08-18
ATE189780T1 (de) 2000-03-15
DE69701315D1 (de) 2000-03-23

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