EP1529571B1 - Biegepresse - Google Patents

Biegepresse 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
English (en)
French (fr)
Other versions
EP1529571A1 (de
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 EP20030104105 priority Critical patent/EP1529571B1/de
Priority to DE2003611270 priority patent/DE60311270T2/de
Publication of EP1529571A1 publication Critical patent/EP1529571A1/de
Application granted granted Critical
Publication of EP1529571B1 publication Critical patent/EP1529571B1/de
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.

Claims (8)

  1. Abkantpresse mit Faltwerkzeugen (3), die mittels einer Aufnahme- und Klemmanordnung in einen bewegbaren Träger (1) eingepasst werden können, welche Aufnahme- und Klemmanordnung zumindest aus Ausnehmungen (2), die in dem Träger (1) zur Unterbringung der Faltwerkzeuge (3) ausgebildet sind, einer Klemmplatte (6), die um eine Schwenkachse (15) schwenkbar ist, welche Klemmplatte (6) ein Ende (9) aufweist, das für den Eingriff mit den in den Ausnehmungen (2) vorhandenen Werkzeugen (3) bestimmt ist und welches eine Anzahl von federnden Lippen (21) aufweist, die nebeneinander angeordnet und durch Ausschnitte (16) voneinander getrennt sind, die sich von dem Rand (18) des Endes (9) der Klemmplatte (6) erstrecken, und einer Antriebsanordnung (7, 8) besteht, die in die Klemmplatte (6) eingreift, um diese um ihre Schwenkachse (15) zu schwenken, wobei das Ende (9) der Klemmplatte (6), das in die Faltwerkzeuge (3) eingreift, und die Stelle des Eingriffs der Antriebsanordnung (7, 8) an gegenüberliegenden Seiten der Schwenkachse (15) liegen, dadurch gekennzeichnet, dass von der Mitte (17) der Klemmplatte (6) nach außen aufeinanderfolgende Ausschnitte (16) einen immer größer werdenden Winkel mit der Senkrechten zu dem Rand (18) der Klemmplatte (6) derart einschließen, dass die Ausschnitte (16) in einer Richtung von dem Rand (18) zu der Schwenkachse (15) hin gegenseitig konvergieren.
  2. Abkantpresse nach Anspruch 1, wobei der Abstand zwischen benachbarten Ausschnitten (16) an dem Rand (18) im Wesentlichen unverändert bleibt.
  3. Abkantpresse nach Anspruch 1 oder 2, wobei sich die Ausschnitte (16) im Wesentlichen bis zu der Schwenkachse (15) erstrecken.
  4. Abkantpresse nach einem der vorhergehenden Ansprüche, wobei die Schwenkachse (15) durch eine Gegenschulter (13) eines Gehäuses (14), das an dem Träger (1) zur Unterbringung zumindest eines Teils der Antriebsanordnung (7, 8) montiert ist, und eine Schulter (12) an der Klemmplatte (6) definiert ist, während die Schulter (12) und die Gegenschulter (13) dergestalt sind, dass in der Klemmposition der Klemmplatte (6) ein Flächenkontakt zwischen diesen zum Aufnehmen von Reaktionskräften auftritt, die durch die Klemmkraft und die Antriebskraft verursacht werden.
  5. Abkantpresse nach Anspruch 4, wobei in der Klemmposition der Klemmplatte (6) das Spiel zwischen den seitenenden der Klemmplatte und dem Gehäuse maximal 0,5 mm ist.
  6. Abkantpresse nach Anspruch 5, wobei in der Klemmposition der Klemmplatte (6) das Spiel zwischen den Seitenenden der Klemmplatte und dem Gehäuse in der Größenordnung von 0,1 mm ist.
  7. Abkantpresse nach einem der vorhergehenden Ansprüche, wobei die Antriebsanordnung (7, 8) der Klemmplatte (6) zumindest eine Druckfeder (7) und eine aktivierbare Antriebseinheit (8), wie zum Beispiel eine Zylinder-Kolbenanordnung, aufweist, die in die Klemmplatte (6) an gegenüberliegenden Seiten eingreifen und gegeneinander versetzt sind.
  8. Abkantpresse nach Anspruch 7, wobei die Druckfeder (7) näher zu der Schwenkachse (15) als die Antriebseinheit (8) in die Klemmplatte (6) eingreift.
EP20030104105 2003-11-06 2003-11-06 Biegepresse Expired - Lifetime EP1529571B1 (de)

Priority Applications (2)

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

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20030104105 EP1529571B1 (de) 2003-11-06 2003-11-06 Biegepresse

Publications (2)

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

Family

ID=34429493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030104105 Expired - Lifetime EP1529571B1 (de) 2003-11-06 2003-11-06 Biegepresse

Country Status (2)

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

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 (de) 2005-05-11
DE60311270T2 (de) 2007-07-19
DE60311270D1 (de) 2007-03-08

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