EP0610706A1 - Amélioration dans une méthode de pliage des tôles et machine associée - Google Patents

Amélioration dans une méthode de pliage des tôles et machine associée Download PDF

Info

Publication number: EP0610706A1
Authority: EP; European Patent Office
Prior art keywords: knife; bending; piston; blank; holder
Prior art date: 1993-02-08
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

EP94100971A

Other languages

German (de)

English (en)

Other versions

EP0610706B1 (fr

Inventor

Ireneo De Nardi

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.)

SIPA Industrializzazione Progettazione e Automazione SpA

Original Assignee

SIPA Industrializzazione Progettazione e Automazione 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.)

1993-02-08

Filing date

1994-01-24

Publication date

1994-08-17

1994-01-24 Application filed by SIPA Industrializzazione Progettazione e Automazione SpA filed Critical SIPA Industrializzazione Progettazione e Automazione SpA

1994-08-17 Publication of EP0610706A1 publication Critical patent/EP0610706A1/fr

1996-10-09 Application granted granted Critical

1996-10-09 Publication of EP0610706B1 publication Critical patent/EP0610706B1/fr

2014-01-24 Anticipated expiration legal-status Critical

Status 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
- B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
- B21D5/045—With a wiping movement of the bending blade
- 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
- B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
- B21D5/042—With a rotational movement of the bending blade

Definitions

This invention relates to a new sheet-metal bending process for metal plates, in particular to make bends with a greater angle than 90° in the butt-end or edge portion of sheet-metal plates with an elongated shape, as performed preferably by numerical-control (NC) presses, as well as the machines arranged to carry out such a process.
NC numerical-control
Press-bending is a widely known technology in the sheet-metal forming industry, where it is used in much the same manner by the various manufacturers, except for some minor differences due mainly to various extents of automation implemented in the respective manufacturing processes.
Such a technology is substantially based on the following fabrication cycle, which is briefly outlined below in order to facilitate a comparison with the cycle according to the present invention, which will be described further on.
the sheet-metal bending process is carried out in two distinct phases, which consist in Placing the sheet-metal plate to be folded on an appropriate anvil, which is generally known in the art by its name of 'dihedron' and is accordingly provided with an angled concavity, and in the downstroke of a plunger carrying, duly attached to its downward facing end, an appropriately shaped tool, which is generally known in the art by its name of 'knife'.
the process according to the present invention is based essentially on the fact that the bending operation is performed in three distinct phases, wherein a blank-holder is lowered in the first phase, by means of an appropriate motor-driven piston, on to the plate to be bent so as to keep it firmly between said blank-holder and an appropriate anvil , wherein in the second phase the continuation of said downward displacement of the piston that caused the blank-holder to go down causes a knife to be pushed downward, the lower end of said knife abutting then against the sheet-metal plate to be bent and causing it to therefore rotate around an appropriate edge of said anvil so as to cause said plate to undergo a first 90°-bending, and wherein in the third phase she continued downward movement of said piston forces the rotation of said knife so that one of its ends presses on the bent side of the sheet-metal plate, thereby causing it to further bend around the corresponding inclined and reentrant edge of the anvil , as this is apparent from the illustrations in the Figures and the following description of the machine.
the body of the piston 3 is raised and, therefore, both the spring 5 of the blank-holder 4, arranged between said blank-holder and the piston 3, and the spring 14 contrasting the knife 11, arranged between the lever 11a of said knife and the piston 3, are extended, ie. relaxed, since they work as compression springs.
the knife 11 and its actuation lever 11a are connected with the piston 3 through the rod 10 that is fixedly provided on said piston, said rod being the force transmitting element that actually causes said knife and said lever to rotate with respect to the piston 3.
the thrust pin 6 which is firmly associated with the blank-holder on its upper portion, lies at the bottom end of its stroke with respect to the piston 3, the blank-holder 4 lies in a raised position with respect to the sheet-metal plate 1, while the knife 11, which is at rest, lies in a substantially vertical position, rotated to its clockwise uttermost position, due to the action of the spring 14 that pushes the actuation lever 11a against an appropriate abutment (not shown) situated on the piston 3.
the lower end 12 of said knife 11 is separated from the sheet-metal plate by a distance which is greater than the distance separating the same plate from the lower surface of the blank-holder 4.
the thrust generating and transmitting piston 3 continuing in its downward displacement, pushes through the rod 10 the knife 11 further downward, so that the lower end 12 of said knife 11 is now able to push, and bend by a 90°-angle in an anti-clockwise direction, the edge portion 1a of the sheet-metal plate protruding from the anvil 2.
said terminal tip of the knife imparts an anti-clockwise rotary thrust to the same edge portion in such a way that said edge portion (1b) of the plate undergoes further bending about the edge of the anvil toward the reentrant inclined edge 15, however without touching the latter, and takes therefore the desired inclination which, apart from the sizing of the various afore described components, will also depend on the particular sequencing of the various actuators and movements of the machine, as made possible by the numerical-control technology.
This process in conjunction with the described machine, enable following further advantages to be achieved: simpler bending process, shorter bending times, use of a single anvil for a greater number of inclination or bending angles, easier programming of the whole machine by using the possibilities offered in this connection by the numerical-control technology, simpler and easier implementation of the process, greater operational safety and reliability.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Bending Of Plates, Rods, And Pipes (AREA)
Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
Treatment Of Fiber Materials (AREA)

EP94100971A 1993-02-08 1994-01-24 Amélioration dans une méthode de pliage des tÔles et machine associée Expired - Lifetime EP0610706B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
ITPN930005		1993-02-08
IT93PN000005A IT1265553B1 (it)	1993-02-08	1993-02-08	Procedimento e macchina perfezionati di presso-piegatura

Publications (2)

Publication Number	Publication Date
EP0610706A1 true EP0610706A1 (fr)	1994-08-17
EP0610706B1 EP0610706B1 (fr)	1996-10-09

Family

ID=11394744

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP94100971A Expired - Lifetime EP0610706B1 (fr)	1993-02-08	1994-01-24	Amélioration dans une méthode de pliage des tÔles et machine associée

Country Status (5)

Country	Link
EP (1)	EP0610706B1 (fr)
AT (1)	ATE143839T1 (fr)
DE (1)	DE69400647T2 (fr)
ES (1)	ES2095687T3 (fr)
IT (1)	IT1265553B1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1584385A1 (fr) *	2004-04-06	2005-10-12	Trumpf Maschinen Austria GmbH & CO. KG.	Outil de pliage pour des pièces, notamment tôles, ainsi que machine de pliage avec un tel outil de pliage
CN102294399A (zh) *	2011-06-30	2011-12-28	江苏科行环境工程技术有限公司	电除尘器阳极板卡套加工装置
CN104190757A (zh) *	2014-08-22	2014-12-10	上海元阳金属制品有限公司	折弯机
CN106001271A (zh) *	2016-06-22	2016-10-12	苏州天朋精密元器件有限公司	一种折弯模具
WO2018055193A1 (fr)	2016-09-26	2018-03-29	Trumpf Werkzeugmaschinen Gmbh + Co. Kg	Outil, machine-outil et procédé d'usinage de pièces en forme de plaque
EP3357597A1 (fr) *	2017-02-02	2018-08-08	K.A. Holding Støvring ApS	Piston de cintrage
CN109127895A (zh) *	2017-06-15	2019-01-04	嘉意机床（上海）有限公司	一种折弯机翻向成形模具及方法
IT201900009657A1 (it) *	2019-06-20	2020-12-20	Dallan Spa	Macchina piegatrice per lamiere e metodo di piegatura di lamiere
CN113083952A (zh) *	2021-03-18	2021-07-09	卢长寿	一种高端设备制造冷轧钢弯折设备
EP3932577A1 (fr) *	2020-07-03	2022-01-05	Schröder Maschinenbau GmbH	Outil d'angle pour une machine de pliage en continu

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN108480425B (zh) *	2018-04-17	2019-07-09	张玉芙	全自动折弯机及折弯方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0089904A1 (fr) *	1982-03-19	1983-09-28	Alexis Pauzin	Outil de pliage à plat
JPS5933032A (ja) *	1982-08-16	1984-02-22	Hitachi Ltd	薄板の折り曲げ金型
JPS642726A (en) *	1986-12-27	1989-01-06	Maru Kikai Kogyo Kk	Bending die

1993
- 1993-02-08 IT IT93PN000005A patent/IT1265553B1/it active IP Right Grant
1994
- 1994-01-24 EP EP94100971A patent/EP0610706B1/fr not_active Expired - Lifetime
- 1994-01-24 DE DE69400647T patent/DE69400647T2/de not_active Expired - Fee Related
- 1994-01-24 ES ES94100971T patent/ES2095687T3/es not_active Expired - Lifetime
- 1994-01-24 AT AT94100971T patent/ATE143839T1/de not_active IP Right Cessation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0089904A1 (fr) *	1982-03-19	1983-09-28	Alexis Pauzin	Outil de pliage à plat
JPS5933032A (ja) *	1982-08-16	1984-02-22	Hitachi Ltd	薄板の折り曲げ金型
JPS642726A (en) *	1986-12-27	1989-01-06	Maru Kikai Kogyo Kk	Bending die

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 163 (M - 816) 19 April 1989 (1989-04-19) *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 132 (M - 303)<1569> 20 June 1984 (1984-06-20) *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US7237419B2 (en)	2004-04-06	2007-07-03	Trumpf Maschinen Austria Gesmvh & Co Kg	Bending machine
EP1584385A1 (fr) *	2004-04-06	2005-10-12	Trumpf Maschinen Austria GmbH & CO. KG.	Outil de pliage pour des pièces, notamment tôles, ainsi que machine de pliage avec un tel outil de pliage
CN102294399A (zh) *	2011-06-30	2011-12-28	江苏科行环境工程技术有限公司	电除尘器阳极板卡套加工装置
CN104190757A (zh) *	2014-08-22	2014-12-10	上海元阳金属制品有限公司	折弯机
CN106001271A (zh) *	2016-06-22	2016-10-12	苏州天朋精密元器件有限公司	一种折弯模具
CN109789466A (zh) *	2016-09-26	2019-05-21	通快机床两合公司	用于加工板状工件的工具、机床和方法
WO2018055193A1 (fr)	2016-09-26	2018-03-29	Trumpf Werkzeugmaschinen Gmbh + Co. Kg	Outil, machine-outil et procédé d'usinage de pièces en forme de plaque
US11478835B2 (en)	2016-09-26	2022-10-25	Trumpf Werkzeugmaschinen Gmbh + Co. Kg	Machining planar workpieces
EP3357597A1 (fr) *	2017-02-02	2018-08-08	K.A. Holding Støvring ApS	Piston de cintrage
CN109127895A (zh) *	2017-06-15	2019-01-04	嘉意机床（上海）有限公司	一种折弯机翻向成形模具及方法
IT201900009657A1 (it) *	2019-06-20	2020-12-20	Dallan Spa	Macchina piegatrice per lamiere e metodo di piegatura di lamiere
EP3753645A1 (fr) *	2019-06-20	2020-12-23	Dallan S.p.A.	Machine à plier la tôle et procédé de pliage de la tôle
US11618068B2 (en)	2019-06-20	2023-04-04	Dallan S.P.A.	Sheet metal bending machine and sheet metal bending method
EP3932577A1 (fr) *	2020-07-03	2022-01-05	Schröder Maschinenbau GmbH	Outil d'angle pour une machine de pliage en continu
CN113083952A (zh) *	2021-03-18	2021-07-09	卢长寿	一种高端设备制造冷轧钢弯折设备

Also Published As

Publication number	Publication date
IT1265553B1 (it)	1996-11-22
EP0610706B1 (fr)	1996-10-09
ES2095687T3 (es)	1997-02-16
DE69400647T2 (de)	1997-05-07
ATE143839T1 (de)	1996-10-15
ITPN930005A1 (it)	1994-08-08
DE69400647D1 (de)	1996-11-14
ITPN930005A0 (it)	1993-02-08

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Publication	Publication Date	Title
EP0610706A1 (fr)	1994-08-17	Amélioration dans une méthode de pliage des tôles et machine associée
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TW393363B (en)	2000-06-11	Apparatus for carrying out an operation mechanical workpiece
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