EP2353743A1 - Werkzeug zum Biegen von Blechen - Google Patents

Werkzeug zum Biegen von Blechen Download PDF

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Publication number
EP2353743A1
EP2353743A1 EP11150355A EP11150355A EP2353743A1 EP 2353743 A1 EP2353743 A1 EP 2353743A1 EP 11150355 A EP11150355 A EP 11150355A EP 11150355 A EP11150355 A EP 11150355A EP 2353743 A1 EP2353743 A1 EP 2353743A1
Authority
EP
European Patent Office
Prior art keywords
coating
seat
tool
bending tool
axis
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
EP11150355A
Other languages
English (en)
French (fr)
Other versions
EP2353743B1 (de
Inventor
Armenio Scattolon
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
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2353743A1 publication Critical patent/EP2353743A1/de
Application granted granted Critical
Publication of EP2353743B1 publication Critical patent/EP2353743B1/de
Active 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/18—Lubricating, e.g. lubricating tool and workpiece simultaneously
    • 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
    • B21D5/04—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

  • the present invention relates to a tool for bending sheet metal or similar materials, and mainly comprises two distinct bodies, that is: a matrix tool provided with a suitable seat approximately cylindrical in shape formed in its body and accessible from outside; a rotating tool of substantially cylindrical shape and provided with a V-shaped groove, and suitable to be housed in said seat of said matrix tool and to rotate therein.
  • the forming of said groove in said rotating tool creates a pair of lateral sides suitable to engage with the metal sheet to bend, in which one of said sides acts as a means for locking the sheet, and the other side acts as a bending means.
  • US 4,002,049 Patent discloses a basic solution, which does not provide for the lubrication of the surfaces, which must slide reciprocally between said matrix tool (called “holder” or “saddle” in the above-mentioned patents) and said rotary tool.
  • the solution presented therein although it is effective from the functional standpoint, still presents a fundamental limit that appears evident in an industrial scale production, and that is due to the fact that the lack of a specific lubrication generates a premature wear down of the surfaces that are designed to slide against each other, as well as a considerable increase in temperature between the devices involved, which in turn causes a natural thermal expansion that may, in the most serious cases, also cause the seizure between said surfaces, which must instead be able to slide freely on one another.
  • the second and most serious problem is caused by the fact that said tampons naturally wear down or deplete the lubricant, and thus it is necessary, after a not particularly large number of operating cycles (about 100,000 cycles), to remove completely the matrix-tool + rotary-tool assembly and to remove the spent tampons and replace them with new ones.
  • an improved tool according to the invention comprises:
  • Both said first and second body are made of high-strength metal materials or alloys, usually used for tools.
  • Said second body 3 is inserted in said seat 2 of the first body through said mouth 4, and to stabilize its position a plurality of closing blocks 5 are arranged in such size and positioning as to partially close said mouth 4 so that the second body stays constantly inserted and in contact with said seat 2. It will be obvious, also because it is in itself known, that the inside diameter of the seat 2 is slightly greater than the outside diameter of the second body 3, so as to allow its rotation without interference within the seat 2.
  • the "X" axis of the cylindrical shape of said seat 2 coincides with the axis of the cylindrical shape of said second body 3, which therefore also necessarily coincides with the axis of its rotation within said seat 2.
  • Said second body is provided with a groove in the shape of a "V" that extends lengthwise and that is open outward through said mouth 4 for at least one part of the rotation of said second body 3 within said seat 2 of said first body 1.
  • Said tool made up of said two bodies 1 and 2, is usually installed in a press comprising an upper die 6, and a bottom die 7, around an edge 8 of which is bent the material to be bent, in a manner known in the art and which therefore will not be explained.
  • the second body 3 is partially surrounded by said seat 2 to a sufficient extent to engage it so as to allow it to turn freely around said axis "X", since, as explained above, the respective dimensions are such as to make said rotation possible.
  • the present invention consists of building said second body 3 so that its external surface is treated in such a manner as to have absolutely new and advantageous characteristics both from the point of view of resistance to abrasion, and from the point of view of reduction of friction against external surfaces, and thus of its slidability on such surfaces.
  • these characteristics combined together on the surface of said second body 3, make it possible to achieve said tool, comprising said two bodies, and in particular the second body 3, so as to avoid any form of lubrication, thus eliminating all the consequent burdens, costs and complications explained above.
  • PVD Planar Vehicle
  • PVD Physical Vapour Deposition
  • the PVD processes are methods of atomic deposition in which the material is evaporated from a solid or liquid source in the form of atoms or molecules and carried in vapour phase through a vacuum environment or plasma to the substrate, where it condenses, at temperatures ranging from 250°C to 450°C, and in some cases even beyond, to avoid softening the material of which the substrate is composed.
  • PVD is used to create coatings of a few tens or hundreds of nanometers for films composed of variable percentage alloys, and with deposition speeds of 1 to 10 nm per second.
  • the main stages of a PVD film deposition process are the following:
  • the external surface of the second body 3 develops special properties of resistance to abrasion if it is treated with a specific procedure consisting of providing on it a coating formed by a PVD deposition, in which is generated a series of successive layers of material or hard compounds, and having an ultra-thin thickness (and which for this reason are termed nanolayers).
  • Said optimal and selected combination consists of the deposition of a number of nanolayers, in which:
  • this coating consists of depositing a plurality of nanolayers of composite material made up of the above-mentioned substances, in which the various nanolayers, taken all together, include all the compounds listed above.
  • said coating regardless of how it is achieved, must have a thickness of between 0.5 and 5.0 micron, and a minimum hardness of 3500 HV.
  • the first coating must substantially protect the underlying surface from wear, and therefore it must be very hard, also to guarantee an easy "grip" on that surface; unlike this, the second or upper coating must ensure above all a reduction of the friction coefficient toward external surfaces that slide on it, and therefore this characteristic is preferred, although it also is not best for its hardness.
  • the first coating must advantageously include a plurality of layers deposited in succession, and whose thickness is ultra thin (and which for this reason are called nanolayers), and that coincides with the type of coating (previously described in the fundamental case of deposition of a single coating).
  • a generic nanolayer of the first coating includes any one of the following compounds deposited in PVD:
  • this first coating consists of the deposition of a plurality of nanolayers of material made up of the substances listed above, in which the various nanolayers, taken all together, include all the above-mentioned compounds.
  • CBC type Carbon Based Coating
  • its hardness must be appreciably lower than 3500 HV, that is, lower than the hardness of the first layer, but it must however be substantially greater than 2000 HV, in order to avoid compromising with an excessive wear the useful life of said tool assembly.
  • the tool can also be made for a particularly demanding industrial use without needing any lubrication devices between the first body and the second rotary body, like external lubricant feeding ducts, or tampons wetted with lubricant, or a jacket of low-friction material, like graphite.
  • the present invention also applies in the case in which the coatings formed are more than two, that is, when the second coating too is in turn overlain with a third coating or subsequent coatings.
  • Such different embodiments are naturally easily obtainable by the expert in the field, compatibly with existing requirements of cost, producibility and, naturally, greater or lesser performance characteristics desired, and in particular with the balance between the requirements of hardness and reduction of frictional resistance.
  • the invention is compatible with further devices suitable to ensure the correct position of the tool at rest, shown in Fig. 1 , and particularly with its automatic return in this position, after the lifting of the top press and therefore at the end of the compressive stress between the metal sheet 9 and an edge 10, that defines said V-shaped groove, which thus belongs to said second body 3.
  • Said devices thus include:
EP11150355A 2010-01-15 2011-01-07 Werkzeug zum Biegen von Blechen Active EP2353743B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITPN2010A000002A IT1397559B1 (it) 2010-01-15 2010-01-15 Stampo perfezionato per la piegatura della lamiera

Publications (2)

Publication Number Publication Date
EP2353743A1 true EP2353743A1 (de) 2011-08-10
EP2353743B1 EP2353743B1 (de) 2012-03-21

Family

ID=43733399

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11150355A Active EP2353743B1 (de) 2010-01-15 2011-01-07 Werkzeug zum Biegen von Blechen

Country Status (3)

Country Link
EP (1) EP2353743B1 (de)
AT (1) ATE550114T1 (de)
IT (1) IT1397559B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2982512A1 (fr) * 2011-11-15 2013-05-17 Peugeot Citroen Automobiles Sa Dispositif de pliage d'une tole pour une presse
US20150275370A1 (en) * 2012-10-22 2015-10-01 Ihi Ionbond Ag. Fatigue-resistant coating for metal forming members
AT15220U1 (de) * 2016-03-07 2017-03-15 Ceratizit Austria Gmbh Verfahren zur Herstellung einer Hartstoffschicht auf einem Substrat, Hartstoffschicht, Zerspanwerkzeug sowie Beschichtungsquelle
IT201700085807A1 (it) * 2017-07-26 2019-01-26 Cosma S R L Macchina per la piegatura di lamiere, in particolare di bordi di lamiere
CN113547006A (zh) * 2021-07-26 2021-10-26 王扬 一种汽车用弯管加工设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4002049A (en) 1975-06-09 1977-01-11 Ready Stamping System, Inc. Forming tool for use in a die assembly
US5341669A (en) 1992-02-08 1994-08-30 Ready Tools, Inc. Rotary bending tool with continuous lubrication
US20020104363A1 (en) * 2000-06-23 2002-08-08 Takaaki Maida Metal sheet bending device with rotation inhibiting function
EP1502671A1 (de) 2003-08-01 2005-02-02 Danly IEM , Division of Connell Limited Partnership Drehbare biegevorrichtung und verfahren zur herstellung
EP1051267B1 (de) * 1997-11-04 2006-02-08 Ready Technology, Inc. Lange biegevorrichtung mit drehbarem biege- und formwerkzeug und verfahren zu deren herstellung
WO2008144237A1 (en) 2007-05-18 2008-11-27 Danly Iem, Llc Rotary bender with hybrid saddle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4002049A (en) 1975-06-09 1977-01-11 Ready Stamping System, Inc. Forming tool for use in a die assembly
US5341669A (en) 1992-02-08 1994-08-30 Ready Tools, Inc. Rotary bending tool with continuous lubrication
EP1051267B1 (de) * 1997-11-04 2006-02-08 Ready Technology, Inc. Lange biegevorrichtung mit drehbarem biege- und formwerkzeug und verfahren zu deren herstellung
US20020104363A1 (en) * 2000-06-23 2002-08-08 Takaaki Maida Metal sheet bending device with rotation inhibiting function
EP1502671A1 (de) 2003-08-01 2005-02-02 Danly IEM , Division of Connell Limited Partnership Drehbare biegevorrichtung und verfahren zur herstellung
US20050022574A1 (en) 2003-08-01 2005-02-03 Victor Chun Rotary bending tool and method of manufacture
WO2008144237A1 (en) 2007-05-18 2008-11-27 Danly Iem, Llc Rotary bender with hybrid saddle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FIRMA SCHOLL GMBH: ""PVD-Beschichtung (PVD=Physical Vapour Deposition)"", 24 May 2006 (2006-05-24), pages 1 - 4, XP002641852, Retrieved from the Internet <URL:http://www.glas-scholl.de/arbeitsg/glaserei/esg/schiebetuer/hiska/Farbtoene/was%20ist%20pvd.html> [retrieved on 20110614] *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2982512A1 (fr) * 2011-11-15 2013-05-17 Peugeot Citroen Automobiles Sa Dispositif de pliage d'une tole pour une presse
US20150275370A1 (en) * 2012-10-22 2015-10-01 Ihi Ionbond Ag. Fatigue-resistant coating for metal forming members
US10550477B2 (en) * 2012-10-22 2020-02-04 Ihi Ionbond Ag. Fatigue-resistant coating for metal forming members
AT15220U1 (de) * 2016-03-07 2017-03-15 Ceratizit Austria Gmbh Verfahren zur Herstellung einer Hartstoffschicht auf einem Substrat, Hartstoffschicht, Zerspanwerkzeug sowie Beschichtungsquelle
US10920325B2 (en) 2016-03-07 2021-02-16 Ceratizit Austria Gesellschaft M.B.H. Method for producing a hard material layer on a substrate, hard material layer, machining tool and coating source
IT201700085807A1 (it) * 2017-07-26 2019-01-26 Cosma S R L Macchina per la piegatura di lamiere, in particolare di bordi di lamiere
WO2019021207A1 (en) * 2017-07-26 2019-01-31 Cosma S.R.L. MACHINE FOR FOLDING A SHEET, ESPECIALLY SHEET EDGES
CN113547006A (zh) * 2021-07-26 2021-10-26 王扬 一种汽车用弯管加工设备

Also Published As

Publication number Publication date
ITPN20100002A1 (it) 2011-07-16
IT1397559B1 (it) 2013-01-16
EP2353743B1 (de) 2012-03-21
ATE550114T1 (de) 2012-04-15

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