EP0298056B1 - Presse plieuse pour tôles - Google Patents

Presse plieuse pour tôles Download PDF

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Publication number
EP0298056B1
EP0298056B1 EP88830283A EP88830283A EP0298056B1 EP 0298056 B1 EP0298056 B1 EP 0298056B1 EP 88830283 A EP88830283 A EP 88830283A EP 88830283 A EP88830283 A EP 88830283A EP 0298056 B1 EP0298056 B1 EP 0298056B1
Authority
EP
European Patent Office
Prior art keywords
blade
bending press
bending
folding
blades
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
EP88830283A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0298056A2 (fr
EP0298056A3 (en
Inventor
Antonio Codatto
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT88830283T priority Critical patent/ATE82167T1/de
Publication of EP0298056A2 publication Critical patent/EP0298056A2/fr
Publication of EP0298056A3 publication Critical patent/EP0298056A3/fr
Application granted granted Critical
Publication of EP0298056B1 publication Critical patent/EP0298056B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D5/045—With a wiping movement of the bending blade

Definitions

  • the present invention relates to a press according to the preamble of claim 1 intended to perform the bending of sheets, in order to produce panels folded at their edges, on one or more of their sides.
  • a press brake of this type is known from the prior art, for example, from document EP-A-0 023 894.
  • press brakes essentially comprising a lower counter blade and an upper plate press counter blade, which extend mainly in the longitudinal direction being supported by a supporting structure.
  • these presses further comprise a carriage which supports and ensures the displacement of an upper folding blade and a lower folding blade, which blades, in combination with the aforementioned counterblades, contribute to effecting the folding down or upwards of the end edges of a sheet kept in position by said counterblades.
  • the folding blade is mounted on a pivot oriented horizontally, and on this blade acts a rod-shaped corner which is movable longitudinally and whose displacement is likely to modify the inclination of the blade around said pivot.
  • the devices for moving the blade are numerous and complex, being constituted by a series of aligned pistons which are arranged over the entire length of the blade and which, acting on it, are capable of causing angular displacement in a determined direction, overcoming the action of a series of return means which tend to push the blade in the opposite direction.
  • the invention proposes to produce a press brake for sheets which, constructively and functionally, turns out to be much simpler than similar devices of known type, belonging to the genre specified in the introduction.
  • the press brake object of the present invention is defined by the combination of characteristics according to claim 1.
  • the invention provides that the two blades are fixed to a blade holder having a C-shaped profile and which is actuated by one or more hydraulic jacks whose positioning can be pre-adjusted by acting on a shaft which extends longitudinally over the entire length of the device, being articulated by its ends at the level of the fixed lateral flanges of the press, around said shaft being mounted one or a plurality of eccentric elements provided at level each of the jacks and engaged in a corresponding seat provided on the lower extension of these jacks.
  • the angular position of the shaft is capable of determining the positioning of the aforementioned cylinders and thus pre-adjusting the angle of the bending obtained on the sheet once the hydraullic cylinder or cylinders exert their action.
  • a fundamental characteristic of the invention lies in the fact that at the rear part of the C-structure which carries the folding blades, rolling members are provided which move along suitably profiled tracks, so as to cause moving forward, in an arc, of the above structure when one of the blades is brought closer to the counterblades, said blades then being able to develop their folding function.
  • the press brake according to the invention proves to be much simpler than similar devices of known type, since only the adjustment of the angular position of the aforementioned shaft is sufficient to pre-adjust the sheet bending angle.
  • the device according to the invention it is also possible to very simply obtain the bending of the sheets at very small angles in the same way as angles much greater than 90 ° relative to the situation of departure from flat sheet.
  • the invention comprises a lower counter blade 1 secured to a vertical extension 2 ′ of a fixed structure 2 in the shape of an L, at the level of the upper part of which is articulated at 3 the support 4 of the upper counter blade 5; the sheet will be placed between the two counter blades 1 and 5 which will keep it in position during the folding operation, said sheet being able to be inserted between said blades as a result of the lifting capacity of the upper counter blade 5.
  • a blade-holder device 6 constituted by a C-profile carriage which extends longitudinally over the entire length of the device and which supports the upper blade 7 as well as the lower blade 8 at its ends, said blades being shaped so as to have the concavity turned in the direction of the two counterblades, the lower blade being intended for bending the sheet upwards, while the upper blade is designed to perform bending of the sheet metal downwards, the constructive arrangement of said blades and counterblades being carried out in accordance with known methods.
  • the blade holder 6 is supported and therefore moved by one or by a series of hydraulic cylinders 9, the rod 10 of which extends substantially vertically, the upper end of the latter being articulated to the underside of said holder. blades.
  • Each of these jacks has a lower extension 11 inside which is axially provided a seat in which is engaged an eccentric element 12 mounted on a shaft 13, which extends over the entire length of the device and is articulated at 13 ', at its ends, on the fixed lateral flanges of the device. It is easy to understand that with this arrangement, each angular position of the shaft 13 corresponds to a precise vertical positioning of the jack 9 and therefore of the blade holder 6.
  • the eccentrics 12 will preferably be set to a circular profile.
  • means are provided for supporting the shaft 13, provided near each of the jacks 9 and capable of preventing any bending of the shaft in these areas.
  • the blade holder has, at its rear part, a series of bearing members 14 and 15 which run on tracks 15-17 oriented in a substantially vertical direction, which tracks comprising end portions 18 with curved profile, the radius is less than that of the aforementioned organs.
  • the device according to the invention is able to fold the sheet 19 downwards; more particularly this folding will be all the more accentuated as the distance from the axis of the eccentric element 12 relative to the pivot 13 'will be smaller. Also in this case the folding action of the sheet 19 is made possible by the particular profile of the lower end portion 18 of the lower track 16 since the movement of the rolling means 14 on said part obliges the blade holder 6 to complete, also in this case, a profile with an arc of a circle.
  • the device according to the invention proves to be particularly simple on a constructive level compared to similar devices of known type. It is also understood that the adjustment of the folding angle as the actuation of this folding are intrinsically simpler to implement in the device according to the invention compared to similar devices of known type. It should be understood that means may be provided for modifying the position of the jack 9 different from those described by way of nonlimiting example in order to be able to ensure the prior arrangement of the blade holder 6 for obtain the desired folding of the sheet 19 downwards by the upper blade 7, or upwards by the lower blade 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Laminated Bodies (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Manufacturing And Processing Devices For Dough (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
EP88830283A 1987-07-03 1988-07-01 Presse plieuse pour tôles Expired - Lifetime EP0298056B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88830283T ATE82167T1 (de) 1987-07-03 1988-07-01 Biegepresse fuer bleche.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8557287 1987-07-03
IT85572/87A IT1222347B (it) 1987-07-03 1987-07-03 Pressa piegatrice per lamiere

Publications (3)

Publication Number Publication Date
EP0298056A2 EP0298056A2 (fr) 1989-01-04
EP0298056A3 EP0298056A3 (en) 1990-08-29
EP0298056B1 true EP0298056B1 (fr) 1992-11-11

Family

ID=11328296

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88830283A Expired - Lifetime EP0298056B1 (fr) 1987-07-03 1988-07-01 Presse plieuse pour tôles

Country Status (7)

Country Link
US (1) US4836004A (ja)
EP (1) EP0298056B1 (ja)
JP (1) JPH084838B2 (ja)
AT (1) ATE82167T1 (ja)
DE (1) DE3875819T2 (ja)
ES (1) ES2036715T3 (ja)
IT (1) IT1222347B (ja)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH087939Y2 (ja) * 1989-11-14 1996-03-06 株式会社アマダ 板材折曲げ加工機
IT1242874B (it) * 1990-12-07 1994-05-18 Samat Srl Macchina per la piegatura di lamiere
IT1258577B (it) * 1992-04-22 1996-02-27 Antonio Codatto Dispositivo di movimentazione per lame di pressa piegatrice per lamiere
IT1267472B1 (it) * 1994-10-27 1997-02-05 Sapim Amada Spa Pressa piegatrice per l'esecuzione di pieghe a c sui quattro bordi di un pannello di lamiera.
IT1267490B1 (it) * 1994-11-09 1997-02-05 Sapim Amada Spa Dispositivo di presa e movimentazione di pezzi di materiale in foglio e manipolatore di pezzi di materiale in foglio comprendente tale
IT1278356B1 (it) * 1995-02-06 1997-11-20 Sapim Amada Spa Attrezzatura piegatrice per lamiere.
FR2750625B1 (fr) * 1996-07-05 1999-01-29 Jeandeaud Jean Claude Dispositif pour deplacer une partie d'une machine et exercer un effort en fin de course
IT1292259B1 (it) * 1997-04-15 1999-01-29 Antonio Codatto Pressa piegatrice per lamiere.
IT1306469B1 (it) * 1998-05-29 2001-06-11 Dallan Srl Macchina piegatrice - tranciatrice.
DE19847905A1 (de) * 1998-10-19 2000-04-20 Weinbrenner Paul Maschbau Biegeeinrichtung
DE102004031290A1 (de) * 2004-06-29 2006-02-09 Adam Opel Ag Ankippsystem für eine Bördelvorrichtung
ES2322594T3 (es) * 2004-10-22 2009-06-23 Finn-Power Oy Sistema cinematico para el desplazamiento de unidades de trabajo de maquinas para doblar y conformar chapas metalicas.
US7434438B2 (en) * 2005-06-28 2008-10-14 Clarence Kornelsen Folding brake

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US826807A (en) * 1906-04-21 1906-07-24 Alexander Slaysman Jr Machine for edging sheet-metal blanks.
CH216009A (de) * 1940-11-04 1941-07-31 Ruf Walter Maschine zum Abkanten von Blechen.
US2552616A (en) * 1949-08-11 1951-05-15 Cyril J Bath Multiple tangent bender
FR1160321A (fr) * 1955-11-17 1958-07-11 Dispositif pour le pliage de tôles servant au recouvrement des toitures
US3054437A (en) * 1960-01-29 1962-09-18 Laxo Ed Can body blank forming machine
GB951895A (en) * 1962-01-30 1964-03-11 Oliver Machinery Co Improvements relating to folder brakes for forming corners in sheet material
IT1086365B (it) * 1977-09-19 1985-05-28 Salvagnini Transferica Spa Macchina per la produzione di pannelli di lamiera rettangolare con bordi piegati
AT363756B (de) * 1979-06-20 1981-08-25 Krems Huette Gmbh Biegemaschine
IT1122696B (it) * 1979-08-02 1986-04-23 Salvagnini Transferica Spa Perfezionamento nelle presse-piegatrici
AT372883B (de) * 1981-10-09 1983-11-25 Voest Alpine Ag Vorrichtung zum abkanten einer blechtafel
GB8320764D0 (en) * 1983-08-02 1983-09-01 Rhodes Joseph Ltd Bending machines
US4658625A (en) * 1984-03-30 1987-04-21 Amada Company, Limited Bending machine and a die changing system for such bending machine
AT381046B (de) * 1984-12-03 1986-08-11 Voest Alpine Ag Verfahren und vorrichtung zum herstellen von vieleckigen, insbesondere rechteckigen formteilen aus blech
US4671094A (en) * 1985-10-28 1987-06-09 Tapco Products Company, Inc. Portable sheet bending brake
JPS61111736A (ja) * 1985-11-15 1986-05-29 Maru Kikai Kogyo Kk パネルフオーマー

Also Published As

Publication number Publication date
IT1222347B (it) 1990-09-05
DE3875819T2 (de) 1993-05-13
EP0298056A2 (fr) 1989-01-04
ATE82167T1 (de) 1992-11-15
JPS6448622A (en) 1989-02-23
ES2036715T3 (es) 1993-06-01
IT8785572A0 (it) 1987-07-03
EP0298056A3 (en) 1990-08-29
DE3875819D1 (de) 1992-12-17
JPH084838B2 (ja) 1996-01-24
US4836004A (en) 1989-06-06

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