EP1479461A1 - Dispositif de support d'un outil de formage dans une presse à cintrer - Google Patents

Dispositif de support d'un outil de formage dans une presse à cintrer Download PDF

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Publication number
EP1479461A1
EP1479461A1 EP04012065A EP04012065A EP1479461A1 EP 1479461 A1 EP1479461 A1 EP 1479461A1 EP 04012065 A EP04012065 A EP 04012065A EP 04012065 A EP04012065 A EP 04012065A EP 1479461 A1 EP1479461 A1 EP 1479461A1
Authority
EP
European Patent Office
Prior art keywords
punch
support system
permanent magnets
tool
groove
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.)
Withdrawn
Application number
EP04012065A
Other languages
German (de)
English (en)
Inventor
Sergio Cavallini
Filippo Mondani
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 EP1479461A1 publication Critical patent/EP1479461A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the present invention deals with a support system for a punch for a bending press.
  • a bending press provides for a structure composed of a lower table on which a matrix die rests, on which the sheet of plate to be bent is rested, and of a vertically translating upper table adapted to support a tool, called punch, adapted to press onto the plate next to the below-placed matrix die.
  • Punches are blocked in an upper table seat through an hooking device that provides for an actual locking device of the mechanical, pneumatic or hydraulic type and a stop or support device to prevent the punch from falling when it is free from the locking system upon assembling or disassembling it for a replacement.
  • the stop device such as for example the one disclosed in Italian Patent N. 1308548, provides for a coupling between a stop tooth and a groove obtained in the punch.
  • a first electromagnet is further provided, inserted inside the press housing in which the punch tang is inserted.
  • a permanent magnet is inserted that operates on the punch ends in order to support the punch itself, while the first electromagnet, if activated, cancels or decreases the support flow emitted by the first permanent magnet till it allows unlocking the tool.
  • the punch supporting action is thereby separated from the unlocking control action in order to keep the punch in its seat even in case of failures and consequently improve the resistance characteristics of the whole assembly.
  • the projecting member has a slanted coupling surface with respect to the tang axis so that the magnet exerts an attraction force with an horizontal component and a vertical component.
  • the projecting member application implies particular tool working and a welding that is particularly difficult and is the weak point of the tool itself.
  • Object of the present invention is solving the above-described inconveniences by providing an extremely simple tool or punch, though at the same time meeting the task of guaranteeing the tool seal during its hooking and unhooking steps to the upper table of the bending press.
  • This object is wholly obtained by the support system for the tool of a bending press object of the present invention that is characterised in that it provides a permanent magnet on the upper horizontal plane surface of the tool tang.
  • the permanent magnet is housed in a groove longitudinally obtained on said upper surface or, according to another embodiment, in an intermediate member placed between tool and locking device.
  • 1 designates a punch adapted to be secured through suitable locking means to the upper table of a bending press.
  • the punch provides for an horizontal groove or slot 2 obtained on the upper face 5 of the punch tang 3.
  • one or more permanent magnets 4 are housed and are smoothly arranged along the whole or part of the groove.
  • the groove has a depth that is greater than the magnet thickness, so that the thrust exerted by the press is not discharged onto the magnets that are rather brittle and do not resist to the high compression forces of a bending press.
  • the magnets wholly occupy the groove obtained on the punch head, while in figure 2 the magnets are spaced and smoothly arranged along the groove. The magnets are retained into the groove through glueing.
  • the groove has been made by milling the plane head tool surface, but it could be obtained by screwing two edges to the punch, such edges creating the groove or slot in which the permanent magnets are inserted.
  • 6 points out an intermediate member composed of a plate on the lower face 7 of which a groove is obtained in which a permanent magnet 8 is inserted, that faces the upper face 5 of a tool, not shown.
  • two blind holes 10 are obtained in which two helical springs 11 are housed, that allow the plate 12 of the locking device to slightly rotate outwards in order to allow a similar punch rotation to enable the punch detachment from the magnet in case of replacement.
  • the locking device plate is secured with a socket head screw 13 whose shank passes through a hole with a greater diameter.
  • the permanent magnet action in fact is such as to oppose a certain resistance to a vertical traction action, while such action can be easily won by a rotation exerted by an operator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP04012065A 2003-05-23 2004-05-21 Dispositif de support d'un outil de formage dans une presse à cintrer Withdrawn EP1479461A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPR20030037 2003-05-23
ITPR20030037 ITPR20030037A1 (it) 2003-05-23 2003-05-23 Sistema di sostegno di un punzone per pressa piegatrice.

Publications (1)

Publication Number Publication Date
EP1479461A1 true EP1479461A1 (fr) 2004-11-24

Family

ID=33042711

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04012065A Withdrawn EP1479461A1 (fr) 2003-05-23 2004-05-21 Dispositif de support d'un outil de formage dans une presse à cintrer

Country Status (2)

Country Link
EP (1) EP1479461A1 (fr)
IT (1) ITPR20030037A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106216516A (zh) * 2016-08-08 2016-12-14 安徽威亚机械制造有限公司 一种折弯机压模、折弯机及压模方法
WO2018049056A1 (fr) * 2016-09-09 2018-03-15 Mate Precision Tooling, Inc. Système de mise en prise d'outil de presse-plieuse
WO2018071946A3 (fr) * 2016-10-20 2018-07-05 Trumpf Maschinen Austria Gmbh & Co. Kg. Procédé de chargement pour une machine-outil
WO2019006080A1 (fr) * 2017-06-29 2019-01-03 Mate Precision Tooling, Inc. Presse-plieuse magnétique et systèmes d'entrée en prise d'outillage de machine
US10953453B2 (en) 2017-11-06 2021-03-23 Mate Precision Technologies Inc. Magnetic press brake tooling engagement system
US11235370B2 (en) 2019-04-08 2022-02-01 E&S Enterprises Inc. Punch assembly with interchangeable tips

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2912249A (en) * 1955-06-13 1959-11-10 Eckold Walter Tool clamps
JPS5550920A (en) * 1978-10-06 1980-04-14 Matsushita Electric Ind Co Ltd Bending device
DE19518387A1 (de) * 1995-05-23 1996-11-28 Dieter Jung Abkantbank
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
JP2003117607A (ja) * 2001-10-09 2003-04-23 Kitagawa Seisakusho:Kk プレス曲げ機用金型

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2912249A (en) * 1955-06-13 1959-11-10 Eckold Walter Tool clamps
JPS5550920A (en) * 1978-10-06 1980-04-14 Matsushita Electric Ind Co Ltd Bending device
DE19518387A1 (de) * 1995-05-23 1996-11-28 Dieter Jung Abkantbank
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
JP2003117607A (ja) * 2001-10-09 2003-04-23 Kitagawa Seisakusho:Kk プレス曲げ機用金型

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 0040, no. 92 (M - 018) 3 July 1980 (1980-07-03) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 08 6 August 2003 (2003-08-06) *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106216516B (zh) * 2016-08-08 2018-09-11 安徽威亚机械制造有限公司 一种折弯机压模及折弯机
CN106216516A (zh) * 2016-08-08 2016-12-14 安徽威亚机械制造有限公司 一种折弯机压模、折弯机及压模方法
US11383284B2 (en) 2016-09-09 2022-07-12 Mate Precision Technologies Inc. Press brake tool engagement system
WO2018049056A1 (fr) * 2016-09-09 2018-03-15 Mate Precision Tooling, Inc. Système de mise en prise d'outil de presse-plieuse
WO2018071946A3 (fr) * 2016-10-20 2018-07-05 Trumpf Maschinen Austria Gmbh & Co. Kg. Procédé de chargement pour une machine-outil
US11491530B2 (en) 2016-10-20 2022-11-08 Trumpf Maschinen Austria Gmbh & Co. Kg Device for positioning a bending tool
CN109922900A (zh) * 2016-10-20 2019-06-21 特鲁普机械奥地利有限公司及两合公司 定位弯曲工具的装置
CN109922900B (zh) * 2016-10-20 2020-11-20 特鲁普机械奥地利有限公司及两合公司 定位弯曲工具的方法
US11471927B2 (en) 2016-10-20 2022-10-18 Trumpf Maschinen Austria Gmbh & Co. Kg Loading method for a machine tool and tool transfer device
US10792716B2 (en) 2017-06-29 2020-10-06 Mate Precision Tooling, Inc. Magnetic press brake and machine tooling engagement systems
WO2019006080A1 (fr) * 2017-06-29 2019-01-03 Mate Precision Tooling, Inc. Presse-plieuse magnétique et systèmes d'entrée en prise d'outillage de machine
US10953453B2 (en) 2017-11-06 2021-03-23 Mate Precision Technologies Inc. Magnetic press brake tooling engagement system
US11235370B2 (en) 2019-04-08 2022-02-01 E&S Enterprises Inc. Punch assembly with interchangeable tips

Also Published As

Publication number Publication date
ITPR20030037A1 (it) 2004-11-24

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