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EP1366832A2 - Werkzeugkupplungsvorrichtung, insbesondere für Pressen - Google Patents

Werkzeugkupplungsvorrichtung, insbesondere für Pressen Download PDF

Info

Publication number
EP1366832A2
EP1366832A2 EP03011599A EP03011599A EP1366832A2 EP 1366832 A2 EP1366832 A2 EP 1366832A2 EP 03011599 A EP03011599 A EP 03011599A EP 03011599 A EP03011599 A EP 03011599A EP 1366832 A2 EP1366832 A2 EP 1366832A2
Authority
EP
European Patent Office
Prior art keywords
tool
housing
jaw
magnet
active
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.)
Granted
Application number
EP03011599A
Other languages
English (en)
French (fr)
Other versions
EP1366832B1 (de
EP1366832A3 (de
Inventor
Giovanni Cella
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.)
Schiavi Macchine Industriali SpA
Original Assignee
Schiavi Macchine Industriali 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 Schiavi Macchine Industriali SpA filed Critical Schiavi Macchine Industriali SpA
Publication of EP1366832A2 publication Critical patent/EP1366832A2/de
Publication of EP1366832A3 publication Critical patent/EP1366832A3/de
Application granted granted Critical
Publication of EP1366832B1 publication Critical patent/EP1366832B1/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 present invention refers to a tool coupling device, particularly for press machines, of the type comprising at least one magnet arranged next to a tool-holder housing of the machine and operatively active on a ferromagnetic abutment surface of a tool, in order to keep it inside said housing and locking means operatively active on the tool, to prevent its accidental disengagement from the housing.
  • a press has a structure comprising a lower fixed table, having the matrixes, and an upper vertically moving table, on which one or more tools, also called punches or counter-V, are secured.
  • Tool coupling devices are known that provide for locking a tool end inside a press housing.
  • Such coupling devices allow replacing the tools and are traditionally made through hydraulic, pneumatic, mechanical or mixed systems, anyway adapted to lock the tool position, by abutment in horizontal movements and by friction in vertical movements.
  • the above coupling devices comprise holding means to avoid the accidental tool drop, once the tool has been previously freed from the locking action of the device.
  • Such holding means generally provide for a mechanical coupling between one holding tooth and a groove; this latter one can be obtained on the tool, if the holding tooth is assembled on the press table, or on the tool housing, if the holding tooth is assembled on the tool itself.
  • the tool replacement can thereby occur through lateral withdrawal or through vertical withdrawal, by operating on the tool itself to remove the coupling between holding tooth and groove.
  • the holding device is generally kept tightened by means of hydraulic, pneumatic, mechanical or mixed systems.
  • a tool coupling device that provides for the use of a first permanent magnet internally arranged with respect to a tool housing, the action of said first permanent magnet operating on the tool end and being controlled by a corresponding first electromagnet.
  • the tool supporting action performed by the first magnet is divided by the unlocking control action performed by the first electromagnet.
  • the above locking device further comprises a second permanent magnet placed between an holding device and the press in order to perform the tool tightening.
  • the action of the second permanent magnet is controlled by a second electromagnet.
  • the main inconvenience of such locking device is that the absence of electric current prevents the removal and/or replacement of a previously-installed tool.
  • Object of the present invention is solving the above inconveniences, providing a tool coupling device, particularly for press machines, that is able to limit accident risks for operators due to mechanical failures or breakage.
  • Another object of the present invention is providing a coupling device that allows a quick tool replacement.
  • a further object of the present invention is realising a coupling device that is simple and inexpensive to manufacture and can be easily maintained.
  • the coupling device of the invention is globally designated by number 1 and is of the type comprising: a magnet 2 arranged next to a tool-holder housing 3 and operatively active on a ferromagnetic abutment surface of a tool (not shown), in order to keep it inside said housing; locking means 4 operatively active on the tool, in order to prevent an accidental disengagement thereof from the housing.
  • the magnet 2 can be a magnet of the permanent type or alternatively an electromagnet.
  • the locking means 4 originally comprise a jaw 5 secured next to the tool-holder housing 3 through an hinge 6 and having a portion 5a adapted to be pressed against the tool.
  • the locking means 4 are further provided with resilient means 7 connected to the hinge 5 on the opposite part to the portion 5a with respect to the hinge 6, in order to rotate the jaw and press said portion against the tool, and with means 8 to adjust a pre-loading of the resilient means.
  • the tool is equipped with a magnetic abutment surface or an abutment surface equipped with a magnet and that the coupling device 1 is equipped, as replacement for the magnet 2, with a ferromagnetic element interacting with the tool abutment surface.
  • the magnet would be applied to the tool instead of the press.
  • the resilient means 7 comprise at least one pre-compressed spring 9 housed in a transverse machine recess and placed between jaw 5 and an abutment surface 10, this latter one being movable at least between a first operating position corresponding to the maximum compression of the spring 9 (open jaw) and a second operating position corresponding to at least a partial spring extension (jaw closed onto the tool).
  • the means 8 for adjusting a pre-loading of the spring 9 comprise at least one screw 11 coaxial with the spring and integrally connected with the abutment surface 10.
  • the device 1 further comprises screw moving means 12.
  • screw moving means 12 comprise a toothed wheel 13 integrally connected with the screw 11, a rack (not shown) kinematically connected with the toothed wheel 13 to activate its rotation and rack moving means (not shown).
  • the rack engaging with the toothed wheel 13, makes it rotate, advancing or retracting the screw 11 by a prefixed pitch and consequently moving the abutment surface 10. In such a way, it is possible to adjust the amount of pre-loading for the spring 9 and therefore to lock and/or unlock the portion 5a of the jaw 5 that presses onto the tool.
  • the rack with the toothed wheel 13 are thereby uncoupling means shaped in such a way as to free the tool kept by the device and simultaneously also free the tools of the other coupling devices that are part of the machine.
  • the invention obtains further important advantages.
  • the presence of the jaw 5 together with the magnet 2 arranged next to the housing 3, allows a quick tool replacement, since it allows an operator to vertically operate on the tool itself.
  • a further advantage is given by the fact that the device 1, once installed, allows reducing maintenance times and costs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Jigs For Machine Tools (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Clamps And Clips (AREA)
  • Press Drives And Press Lines (AREA)
  • Details Of Cutting Devices (AREA)
EP03011599A 2002-05-28 2003-05-22 Werkzeugkupplungsvorrichtung, insbesondere für Pressen Expired - Lifetime EP1366832B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2002PR000028A ITPR20020028A1 (it) 2002-05-28 2002-05-28 Dispositivo di aggancio di utensili, in particolare per macchine da pressa.
ITPR20020028 2002-05-28

Publications (3)

Publication Number Publication Date
EP1366832A2 true EP1366832A2 (de) 2003-12-03
EP1366832A3 EP1366832A3 (de) 2005-10-05
EP1366832B1 EP1366832B1 (de) 2008-03-05

Family

ID=29416383

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03011599A Expired - Lifetime EP1366832B1 (de) 2002-05-28 2003-05-22 Werkzeugkupplungsvorrichtung, insbesondere für Pressen

Country Status (5)

Country Link
EP (1) EP1366832B1 (de)
AT (1) ATE387972T1 (de)
DE (1) DE60319461T2 (de)
ES (1) ES2302878T3 (de)
IT (1) ITPR20020028A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006012182A1 (en) * 2004-06-25 2006-02-02 Wilson Tool International, Inc. Thermally-actuated press brake tool holder technology

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012102759U1 (de) * 2012-07-23 2013-07-24 Krones Aktiengesellschaft Faltvorrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05337553A (ja) * 1992-06-05 1993-12-21 Amada Metrecs Co Ltd プレスブレーキ用金型クランプ装置
JPH06142767A (ja) * 1992-11-05 1994-05-24 Amada Metrecs Co Ltd プレスブレーキ用金型ホルダの駆動装置
JPH06262263A (ja) * 1993-03-15 1994-09-20 Yazaki Corp プレスブレーキ上型クランプ装置
FR2791590A1 (fr) * 1999-03-31 2000-10-06 Michel Brisard Dispositif de mise en position et de maintien pour outils travaillant en exercant une pression et porte-outils correspondant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05337553A (ja) * 1992-06-05 1993-12-21 Amada Metrecs Co Ltd プレスブレーキ用金型クランプ装置
JPH06142767A (ja) * 1992-11-05 1994-05-24 Amada Metrecs Co Ltd プレスブレーキ用金型ホルダの駆動装置
JPH06262263A (ja) * 1993-03-15 1994-09-20 Yazaki Corp プレスブレーキ上型クランプ装置
FR2791590A1 (fr) * 1999-03-31 2000-10-06 Michel Brisard Dispositif de mise en position et de maintien pour outils travaillant en exercant une pression et porte-outils correspondant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006012182A1 (en) * 2004-06-25 2006-02-02 Wilson Tool International, Inc. Thermally-actuated press brake tool holder technology
US7296457B2 (en) 2004-06-25 2007-11-20 Wilson Tool International Inc. Thermally-actuated press brake tool holder technology

Also Published As

Publication number Publication date
EP1366832B1 (de) 2008-03-05
ATE387972T1 (de) 2008-03-15
ITPR20020028A1 (it) 2003-11-28
EP1366832A3 (de) 2005-10-05
DE60319461T2 (de) 2009-03-05
ES2302878T3 (es) 2008-08-01
DE60319461D1 (de) 2008-04-17

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