EP1762310B1 - Quick upper tool coupling and uncoupling device of a press brake - Google Patents

Quick upper tool coupling and uncoupling device of a press brake Download PDF

Info

Publication number
EP1762310B1
EP1762310B1 EP05425638A EP05425638A EP1762310B1 EP 1762310 B1 EP1762310 B1 EP 1762310B1 EP 05425638 A EP05425638 A EP 05425638A EP 05425638 A EP05425638 A EP 05425638A EP 1762310 B1 EP1762310 B1 EP 1762310B1
Authority
EP
European Patent Office
Prior art keywords
tool
groove
cursor
terminal part
plunger
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.)
Not-in-force
Application number
EP05425638A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1762310A1 (en
Inventor
Domenico Mazzocchi
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.)
Rolleri SpA
Original Assignee
Rolleri SpA
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 Rolleri SpA filed Critical Rolleri SpA
Priority to ES05425638T priority Critical patent/ES2296121T3/es
Priority to AT05425638T priority patent/ATE378122T1/de
Priority to PL05425638T priority patent/PL1762310T3/pl
Priority to DE602005003366T priority patent/DE602005003366T2/de
Priority to EP05425638A priority patent/EP1762310B1/en
Publication of EP1762310A1 publication Critical patent/EP1762310A1/en
Application granted granted Critical
Publication of EP1762310B1 publication Critical patent/EP1762310B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status 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
    • B21D5/0209—Tools therefor
    • B21D5/0236—Tool clamping
    • 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

Definitions

  • the present invention refers to a quick upper tool coupling and uncoupling device of a press brake as per the preamble of claims 1-4. Such a device is disclosed in JP-A- 6 182 447 .
  • Press brakes are normally fitted with a safety device to prevent installed upper tools from falling off, whenever the tool clamps are placed in an opening position.
  • the assembling and disassembling of a tool to the top beam or to an intermediary occurs in a horizontal direction, meaning that the tool, with the tool connection clamp in an opening position, is allowed to slide laterally along the cavity of the top beam or the intermediary in which the tool connection is inserted.
  • a brace is provided by which an upper die having split upper dies is pressed and fixed on an upper table in a press brake.
  • a groove is provided on the surface of a holder plate with which the split upper dies come into contact and a pressing member which is engaged with the groove is provided on the split upper dies.
  • Document DE3524694 shows a clamping device for top tools in folding presses.
  • the clamping device has a clamping body, which is held movably on the tool carrier by means of an anchor and can be pressed against the tool on the one hand, and against the tool carrier, on the other hand, by means of clamping members, a safety catch for the tool engaging by means of projections in recesses in the tool.
  • This safety catch device consists of catch elements which are guided in the clamping body in a manner which allows them to move perpendicularly to the clamping surface of the tool and are loaded against the tool by a spring.
  • document JP10277647 discloses an upper die holding device.
  • An upper die is provided freely attachably and detachably by means of an upper die clamp on the upper die holder which is installed on the lower end of an upper table of the bending machine.
  • a first fall preventive groove which is engaged/disengaged with an engaging projection installed on the lower end of the upper die clamp, is formed on the front upper part of the upper die.
  • a fall preventive safety device is provided on the front upper part of the upper die holder that is in contact with the rear upper part of the upper die.
  • the problem underlying this invention is to create a quick tool coupling and uncoupling device of a press brake, capable of consenting at least one of the following advantages:
  • FIGS. 1, 2, 3 show typical examples of connections of a tool to the top beam or to the intermediary of a press brake, connections that provide coupling and uncoupling operations of the tool which require a sliding motion of the tool in a lateral direction.
  • Figure 1 the safety device against the falling of the tool is represented by the parts 5a and 6a.
  • the tool connection is released as a result of unclamping the clamp 4a, the tool 2a will in fact not fall, as the relief 5a remains engaged in the groove 6a.
  • the same In order to disassemble the tool, the same must be made to slide horizontally along the front of the press, until the groove 6a disengages from the relief 5a.
  • Figure 2A schematically shows a section view of a known device which allows modifying the lateral type connection in Figure 2 into a front type connection, meaning that it allows tool coupling and uncoupling operations in a vertical direction.
  • the pins 7 are eliminated and replaced by a tooth 10 capable of horizontally sliding within a cavity of the tool connection, and of being pressed by a spring 12 to remain in an engaged position with one of the two cavities 8a.
  • the clamp 4b is shifted to the left into a releasing position, the tool will not fall because of said engagement.
  • the push-button 11 In order to deactivate the fall-preventing device, the push-button 11 must be pressed (so as to disengage the tooth 10 from the cavity 8a) and the tool must at the same time be supported with one hand, to prevent it from falling. The tool, supported by the operator by hand, may then be disassembled with a vertical motion toward the bottom.
  • FIGS 5, 6, 7, 8 schematically shows the lower extremity 1 of the top beam of a press (or of an intermediary installed there), the upper extremity 2 of an installed tool, a clamp 4, and a rapid coupling and uncoupling device according to the invention, essentially consisting of a plunger element 12 capable of being inserted into the clamp 4 or into the tool connection 2 or into the top beam / intermediary, comprising a cursor capable of sliding and having a terminal part of a tapered form, capable of engaging within a groove (16, 17, 18, 19) present in the tool connection, or in the clamp, or in the top beam/intermediary, respectively.
  • a plunger element 12 capable of being inserted into the clamp 4 or into the tool connection 2 or into the top beam / intermediary, comprising a cursor capable of sliding and having a terminal part of a tapered form, capable of engaging within a groove (16, 17, 18, 19) present in the tool connection, or in the clamp, or in the top beam/intermediary, respectively.
  • the plunger element 12, shown in Figure 4 on an enlarged scale according to a preferred form of embodiment, comprises:
  • said seat has a cylindrical form. It could however also be of another form, for instance of a prismatic form.
  • the groove As to the groove, it has a horizontal axis on the front of the press and is allocated:
  • the plunger is positioned so as to allow the cursor tip to enter into the groove and to press against one rim of the groove itself.
  • the spring is chosen and calibrated so that, when the tip in contact with the groove is in a position of maximum entry, the pressure exerted by the same on the cursor is such as to prevent the tool from falling when the relative clamp is in a clamping position.
  • the rim of the groove the cursor tip is pressing against is the upper rim, while in the aforesaid second and third variant it is the lower rim.
  • FIGS. 9A, 9B, 9C show an application example not according to the invention, capable of converting a lateral connection of the type of Figure 2 (shown in Figure 9) into a frontal connection.
  • This application in fact provides for eliminating the cylindrical pins 7, and replacing them with a plunger 12 inserted into the tool connection.
  • the Figure 9A shows the tool clamped by the clamp 4b.
  • the Figure 9B shows the position of the tool after the clamp has moved to a clamping position: instead of falling, the tool has in fact been kept suspended by the action of the plunger against the lower rim of the groove 8a.
  • the figure 9C shows how the plunger appears during the manual tool disassembling operation.
  • FIGS. 10A, 10B and 10D show application examples in accordance with the invention, capable of converting a lateral connection of the type used in Figure 1 (shown in Figure 10) into a frontal connection.
  • FIGS. 11A, 11B and 11D show application examples in accordance with the invention capable of converting a lateral connection of the type used of Figure 3 (shown in Figure 11) into a frontal connection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Braking Arrangements (AREA)
  • Control Of Presses (AREA)
  • Press Drives And Press Lines (AREA)
  • Clamps And Clips (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
EP05425638A 2005-09-13 2005-09-13 Quick upper tool coupling and uncoupling device of a press brake Not-in-force EP1762310B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES05425638T ES2296121T3 (es) 2005-09-13 2005-09-13 Dispositivo de acoplamiento y desacoplamiento rapido del util superior de una prensa de plegar.
AT05425638T ATE378122T1 (de) 2005-09-13 2005-09-13 Schnelle kupplungs- und unkupplungs-vorrichtung für das oberwerkzeug einer biegepresse
PL05425638T PL1762310T3 (pl) 2005-09-13 2005-09-13 Urządzenie do szybkiego sprzęgania i rozprzęgania górnego narzędzia w prasie krawędziowej
DE602005003366T DE602005003366T2 (de) 2005-09-13 2005-09-13 Schnelle Kupplungs- und Unkupplungs-Vorrichtung für das Oberwerkzeug einer Biegepresse
EP05425638A EP1762310B1 (en) 2005-09-13 2005-09-13 Quick upper tool coupling and uncoupling device of a press brake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05425638A EP1762310B1 (en) 2005-09-13 2005-09-13 Quick upper tool coupling and uncoupling device of a press brake

Publications (2)

Publication Number Publication Date
EP1762310A1 EP1762310A1 (en) 2007-03-14
EP1762310B1 true EP1762310B1 (en) 2007-11-14

Family

ID=35502417

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05425638A Not-in-force EP1762310B1 (en) 2005-09-13 2005-09-13 Quick upper tool coupling and uncoupling device of a press brake

Country Status (5)

Country Link
EP (1) EP1762310B1 (es)
AT (1) ATE378122T1 (es)
DE (1) DE602005003366T2 (es)
ES (1) ES2296121T3 (es)
PL (1) PL1762310T3 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10883249B2 (en) 2018-04-06 2021-01-05 Caterpillar Inc. Quick connect and disconnect hammer tool

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20090540A1 (it) * 2009-08-07 2011-02-08 Gennelli Allori S R L Dispositivo di fissaggio di un utensile al cursore di una pressa piegatrice
IT1397907B1 (it) * 2010-01-28 2013-02-04 Rolleri S P A Dispositivo per il bloccaggio di utensili su presse piegatrici
ITVR20100202A1 (it) * 2010-10-22 2012-04-23 Andrea Argentin Dispositivo di fissaggio di un utensile al cursore di una pressa piegatrice
NL2009340C2 (nl) 2012-07-06 2014-01-07 Wila Bv In een werktuig verplaatsbaar gereedschap.
CN104138939A (zh) * 2014-07-25 2014-11-12 朱德仲 一种折弯机刀片用固定装置
CN104259260A (zh) * 2014-09-12 2015-01-07 南京金长江交通设施有限公司 一种受力均匀的护栏立柱矫直机
CN109702070A (zh) * 2018-12-29 2019-05-03 江苏万源新材料股份有限公司 一种异径三通的制造设备
CN113751593A (zh) * 2021-09-24 2021-12-07 安徽东海机床制造有限公司 一种折弯机非平行折弯的上下组合模

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3524694A1 (de) * 1985-07-11 1987-01-22 Hilma Gmbh Maschf Spannvorrichtung fuer oberwerkzeuge in abkantpressen
NL9100034A (nl) 1991-01-10 1992-08-03 Wila Maschf Bv Kantpersgereedschap, en een adaptor en een kantpers daarvoor.
JPH06182447A (ja) * 1992-12-17 1994-07-05 Amada Metrecs Co Ltd 上金型固定装置
JPH10277647A (ja) * 1997-04-04 1998-10-20 Amada Metrecs Co Ltd 折曲げ機における上型ホルダ装置および折曲げ機用上型

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10883249B2 (en) 2018-04-06 2021-01-05 Caterpillar Inc. Quick connect and disconnect hammer tool

Also Published As

Publication number Publication date
DE602005003366D1 (de) 2007-12-27
ES2296121T3 (es) 2008-04-16
EP1762310A1 (en) 2007-03-14
ATE378122T1 (de) 2007-11-15
DE602005003366T2 (de) 2008-02-21
PL1762310T3 (pl) 2008-04-30

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