EP1529571B1 - Presse plieuse - Google Patents

Presse plieuse Download PDF

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Publication number
EP1529571B1
EP1529571B1 EP20030104105 EP03104105A EP1529571B1 EP 1529571 B1 EP1529571 B1 EP 1529571B1 EP 20030104105 EP20030104105 EP 20030104105 EP 03104105 A EP03104105 A EP 03104105A EP 1529571 B1 EP1529571 B1 EP 1529571B1
Authority
EP
European Patent Office
Prior art keywords
clamping plate
clamping
press brake
pivot axis
cuts
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
EP20030104105
Other languages
German (de)
English (en)
Other versions
EP1529571A1 (fr
Inventor
Cornelis Hendricus Liet
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 DE2003611270 priority Critical patent/DE60311270T2/de
Priority to EP20030104105 priority patent/EP1529571B1/fr
Publication of EP1529571A1 publication Critical patent/EP1529571A1/fr
Application granted granted Critical
Publication of EP1529571B1 publication Critical patent/EP1529571B1/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
    • B21D5/02—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 press brake comprising folding tools that can be fitted in a movable beam by means of a receiving and clamping arrangement, which receiving and clamping arrangement consists at least of recesses formed in said beam for accommodating the folding tools, a clamping plate being pivotable about a pivot axis, which clamping plate has an end intended to engage the tools present in said recesses, and which comprises a number of resilient lips arranged side by side and separated from each other by cuts extending from the edge of the end of the clamping plate, and a driving arrangement engaging said clamping plate, which functions to cause the clamping plate to pivot about its pivot axis, wherein the end of the clamping plate that engages the folding tools and the point of engagement of the driving arrangement are located on opposite sides of the pivot axis.
  • a press brake is known from US-A-6003360.
  • the invention provides a press brake comprising folding tools that can be fitted in a movable beam by means of a receiving and clamping arrangement, which receiving and clamping arrangement consists at least of recesses formed in said beam for accommodating the folding tools, a clamping plate being pivotable about a pivot axis, which clamping plate has an end intended to engage the tools present in said recesses, and which comprises a number of resilient lips arranged side by side and separated from each other by cuts extending from the edge of the end of the clamping plate, and a driving arrangement engaging said clamping plate, which functions to cause the clamping plate to pivot about its pivot axis, wherein the end of the clamping plate that engages the folding tools and the point of engagement of the driving arrangement are located on opposite sides of the pivot axis, and whereby from the centre of the clamping plate outwardly successive cuts enclose an ever increasing angle with the perpendicular to said edge of the clamping plate in such a manner, that the cuts mutually converge in a direction from said edge towards said
  • the distance between adjacent cuts at said edge remains substantially unchanged.
  • the pivot axis is defined by a shoulder of a housing mounted on the beam for accommodating at least part of the driving arrangement and a counter shoulder on the clamping plate, whereas the shoulder and counter shoulder are shaped in such a manner that in the clamping position of the clamping plate a surface contact occurs there between for receiving reaction forces caused by the clamping force and driving force.
  • the said surface contact prevents that damage occurs at the cooperating parts of the shoulder and counter shoulder as a result of the high reaction forces which may be generated during the operation of the press brake.
  • the play between the side ends of the clamping plate and the housing is at most 0,5 mm, and preferably is in the magnitude of 0,1 mm, it can be prevented that the clamping plate will assume an inclined position (that means that one of its ends lies at a higher level than its other end). Such an inclined position of the clamping plate would lead to irregularly clamping the folding tools.
  • the press brake according to the invention comprises a movable beam 1, as is already known per se, in which recesses 2 for receiving folding tools 3 are formed.
  • the folding tools 3 can be used for folding sheet material, such as a metal sheet.
  • the folding tools 3 are detachably fitted in the beam 1. After all, it must be possible to adjust the folding tools 3 with respect to the beam 1 (in a direction perpendicular to the plane of the drawing) to move the folding tools 3 at least partially or to exchange at least some of the folding tools for other folding tools.
  • the folding tools comprise a transverse pin 4 which engages in a corresponding recess 5 of the beam 1.
  • these folding tools 3 can be shifted with their transverse pin 4 in the recess 5 of the beam 1 in a direction perpendicular to the plane of the drawing, until the folding tools 3 can be taken away sidewards from the beam 1.
  • a receiving and clamping arrangement which, as far as the most essential parts thereof are concerned, comprises, apart from the recesses 2 and the combination of transverse pin 4 and recess 5, also a pivotable clamping plate 6 and a driving arrangement engaging the clamping plate 6, which driving arrangement in this case consists of compression springs 7 and a driving unit 8.
  • the clamping plate 6 has an end 9 intended for engaging the folding tools 3 that are accommodated in the recesses 2. Said end 9 is thereto provided with a nose 10, which can mate with a corresponding cut out 11 in the folding tools 3.
  • the clamping plate 6 has a shoulder 12 at a point some distance away from the aforesaid end 9, which shoulder rests on a counter shoulder 13 of a housing 14 mounted to the beam 1.
  • a pivot axis for the clamping plate 6 is formed at that location, which pivot axis extends over the entire width of the clamping plate 6, perpendicularly to the plane of drawing in figure 1.
  • the compression springs 7, a number of which are arranged side by side perpendicularly to the plane of drawing, load the clamping plate to a pivoted position (as shown) in which the nose 10 engages the cut-out 11 of the folding tools, so that the folding tools 3 are pressed firmly into the recesses 2 and upwards against the beam 1.
  • the driving unit 8 e.g. a cylinder-piston assembly
  • the clamping plate 6 can be pivoted against the force exerted by the compression springs 7 to a position (not shown) in which the clamping nose 10 releases the recesses 11, and the folding tools 3 can be removed in downward direction, as seen in figure 1, from the beam 1.
  • the point of engagement of the compression springs 7 with the clamping plate 6 is located below the point of engagement of the driving unit 8 (thus closer to the pivot axis).
  • the driving arrangement 7, 8 is positioned at the side of the pivot axis facing away the end 9, as appears clearly from figure 1, the distance between this pivot axis (as defined by the shoulders 12 and 13) and the end 9 can be minimised.
  • possible torsions for example when the clamping plate 4 is asymmetrically loaded are limited.
  • FIG 2 the clamping plate 6 as applied in the press brake illustrated in figure 1 is again visible.
  • the location of the pivot axis has been indicated by a twin dotted line 15.
  • the circles 7' schematically indicate the location where in this case two compression springs 7 engage the clamping plate 6.
  • the driving unit 8 has been indicated in dotted lines.
  • the end 9 of the clamping plate 6 engaging the folding tools is provided with cuts 16.
  • cuts 16 One can see directly, that from the centre of the clamping plate (dotted line 17) outwardly successive cuts 16 enclose an ever increasing angle with the perpendicular to the edge 18 of the clamping plate 6 (this perpendicular runs in parallel to the indicated dotted line 17).
  • the cuts 16 converge in a direction from the edge 18 towards the pivot axis 15.
  • Figure 2 further partially shows the beam 1, which beam 1 comprises mounting arrangements 19 for the housing 14.
  • the clamping plate 6 comprises corresponding cut-outs 20 at its side ends.
  • the distance x between the inner end of each outer cut 16 and the corresponding cut 20 is larger than the distance y between the inner ends of the two innermost cuts 16. This ensures, that at the edges 18 of the lips 21 defined between the cuts 16 substantially equal clamping forces are generated.

Landscapes

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

Claims (8)

  1. Presse plieuse contenant des outils de pliage (3) qui peuvent être montés dans une poutre mobile au moyen d'un agencement de réception et de bridage, lequel agencement de réception et de bridage consiste en au moins des évidements (2) formés dans ladite poutre (1) pour loger les outils de pliage (3), une plaque de bridage (6) étant pivotante autour d'un axe de pivot (15), laquelle plaque de bridage (6) présente une extrémité (9) destinée à coopérer avec les outils présents dans lesdits évidements (2), et qui comprend un certain nombre de lèvres élastiques (21) disposées côte à côte et séparées l'une de l'autre par des découpes (16) s'étendant à partir du bord (10) de l'extrémité (9) de la plaque de bridage (6) et un agencement d'entraînement (7, 8) coopérant avec ladite plaque de bridage (6), dont l'action est de provoquer le pivotement de la plaque de bridage (6) autour de son axe de pivotement (15), dans lequel l'extrémité (9) de la plaque de bridage (6) qui coopère avec les outils de pliage (3) et le point d'engagement de l'agencement d'entraînement (7, 8) sont situés sur les côtés opposés de l'axe de pivotement (15), caractérisée en ce qu'à partir du centre (17) de la plaque de bridage (6), des découpes successives vers l'extérieur (16) incluent un angle sans cesse croissant par rapport à la perpendiculaire audit bord (18) de la plaque de bridage (6), de manière que les découpes (16) convergent mutuellement dans une direction à partir dudit bord (18) vers ledit axe de pivotement (15).
  2. Presse plieuse selon la revendication 1, dans laquelle la distance entre les découpes contiguës (16) sur ledit bord (18) demeure sensiblement inchangée.
  3. Presse plieuse selon la revendication 1 ou 2, dans laquelle les découpes (16) s'étendent sensiblement jusqu'à l'axe de pivotement (15).
  4. Presse plieuse selon l'une des revendications précédentes, dans laquelle l'axe de pivotement (15) est défini par un contre-épaulement (13) d'un logement monté sur la poutre (1) pour recevoir au moins une partie de l'agencement d'entraînement (7, 8) et un épaulement (12) sur la plaque de bridage (6), tandis que l'épaulement (12) et le contre-épaulement (13) sont configurés de telle sorte que, dans la position de bridage de la plaque de bridage (6), il se produit un contact de surface entre ceux-ci pour recevoir les forces de réaction résultant de la force de bridage et de la force d'entraînement.
  5. Presse plieuse selon la revendication 4, dans laquelle, dans la position de bridage de la plaque de bridage (6), le jeu entre les extrémités latérales de la plaque de bridage et du logement est au maximum de 0,5 mm.
  6. Presse plieuse selon la revendication 5, dans laquelle, dans la position de bridage de la plaque de bridage (6), le jeu entre les extrémités latérales de la plaque de bridage et du logement se situe dans l'ordre de grandeur de 0,1 mm.
  7. Presse plieuse selon l'une des revendications précédentes dans laquelle l'agencement d'entraînement (7, 8) de la plaque de bridage (6) comprend au moins un ressort de compression (7) et une unité d'entraînement actionnable (8), telle que par exemple un ensemble cylindre-piston, coopérant avec la plaque de bridage (6) sur des côtés opposés et décalés entre eux.
  8. Presse plieuse selon la revendication 7, dans laquelle le ressort de compression (7) coopère avec la plaque de bridage (6) plus près de l'axe de pivotement (15) que l'unité d'entraînement (8),
EP20030104105 2003-11-06 2003-11-06 Presse plieuse Expired - Lifetime EP1529571B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE2003611270 DE60311270T2 (de) 2003-11-06 2003-11-06 Biegepresse
EP20030104105 EP1529571B1 (fr) 2003-11-06 2003-11-06 Presse plieuse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20030104105 EP1529571B1 (fr) 2003-11-06 2003-11-06 Presse plieuse

Publications (2)

Publication Number Publication Date
EP1529571A1 EP1529571A1 (fr) 2005-05-11
EP1529571B1 true EP1529571B1 (fr) 2007-01-17

Family

ID=34429493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030104105 Expired - Lifetime EP1529571B1 (fr) 2003-11-06 2003-11-06 Presse plieuse

Country Status (2)

Country Link
EP (1) EP1529571B1 (fr)
DE (1) DE60311270T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2789292C1 (ru) * 2019-05-08 2023-02-01 Сальваньини Италия С.П.А. Станок для гибки металлических листов

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009021558B4 (de) * 2009-05-14 2017-12-07 Zahoransky Ag Greifzange
AT510969B1 (de) * 2011-04-29 2012-08-15 Trumpf Maschinen Austria Gmbh Werkzeughalterung für abkantpresse
NL2009340C2 (nl) 2012-07-06 2014-01-07 Wila Bv In een werktuig verplaatsbaar gereedschap.
IT201900006656A1 (it) * 2019-05-08 2020-11-08 Salvagnini Italia Spa Macchina piegatrice per lamiere metalliche

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6003360A (en) * 1997-07-01 1999-12-21 Wilson Tool International, Inc. Press brake tool holder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2789292C1 (ru) * 2019-05-08 2023-02-01 Сальваньини Италия С.П.А. Станок для гибки металлических листов

Also Published As

Publication number Publication date
EP1529571A1 (fr) 2005-05-11
DE60311270D1 (de) 2007-03-08
DE60311270T2 (de) 2007-07-19

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