EP2125264B1 - Procédé et dispositif pour l'emboutissage de pièces brutes de coulée en tôle pour donner des ébauches sans collerette - Google Patents

Procédé et dispositif pour l'emboutissage de pièces brutes de coulée en tôle pour donner des ébauches sans collerette Download PDF

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Publication number
EP2125264B1
EP2125264B1 EP07856204A EP07856204A EP2125264B1 EP 2125264 B1 EP2125264 B1 EP 2125264B1 EP 07856204 A EP07856204 A EP 07856204A EP 07856204 A EP07856204 A EP 07856204A EP 2125264 B1 EP2125264 B1 EP 2125264B1
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EP
European Patent Office
Prior art keywords
blanks
chamber
flangeless
piston
holder
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.)
Active
Application number
EP07856204A
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German (de)
English (en)
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EP2125264A1 (fr
Inventor
Thomas Haar
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.)
Saeta GmbH and Co KG
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Saeta GmbH and Co KG
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Publication date
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Application filed by Saeta GmbH and Co KG filed Critical Saeta GmbH and Co KG
Priority to PL07856204T priority Critical patent/PL2125264T3/pl
Publication of EP2125264A1 publication Critical patent/EP2125264A1/fr
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Publication of EP2125264B1 publication Critical patent/EP2125264B1/fr
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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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/10—Devices controlling or operating blank holders independently, or in conjunction with dies
    • B21D24/14—Devices controlling or operating blank holders independently, or in conjunction with dies pneumatically or hydraulically
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks

Definitions

  • the invention relates to a drawing tool for the deep drawing of blanks made of sheet metal material, which is coated with paint or film material, to flangeless moldings according to claim 1.
  • Lids for containers are usually made by deep-drawing blanks punched from sheets in a deep-drawing die, thereby forming approximately cup-shaped blanks having a top and a skirt portion. Naturally, this leads to a compression of the material in the edge portion due to the reduction of the diameter. Since the material used, in particular steel or aluminum, has a given texture, such deep-drawing operation results in the formation of smaller projections on the free edge. It form so-called ears from (earing).
  • lids for containers that absorb sensitive material or that are filled with korrosions expedindem content it is known to paint the inside of such cover or to provide with any other coating, for example, with foil material.
  • the coating already takes place on the sheet metal material, ie on the sheet metal strip or the sheet metal plates to be punched. This form on the cylindrical or flangeless edge of the deep-drawn lid fine lint or hair-like structures, which are considered to be extremely disadvantageous.
  • the lid within recently heavily contaminate the tool.
  • they can contaminate the contents of a container during the subsequent use of the lid.
  • a typical deep-drawing tool for deep-drawing of flat blanks for the purpose of forming lids provides a drawing bell and a drawing core around which the drawing bell forms the cup-shaped molding. Because of the diameter reduction already described, wrinkles can form on the edge. Therefore, such a Tiefziehtechnikzeng provides a so-called fold holder, which applies under spring force against the edge region. Here, the inside of the edge region lies on the fold holder and thus against the paint or film layer. It has been assumed in the art that the breaking of the material at the end of the stamping process, which is inevitable in particular on harder sheet metal, is the cause of the fraying layer.
  • a spring device for a pleat holder of a drawing tool has become known with which the force of the pleat holder is reduced to the flange of the molding as the deep-drawing process progresses.
  • the surface pressure between the fold holder and the molded article increases with increasing force on the fold holder with increasing force, because the surface of the edge region of the molding cooperating with the fold holder becomes progressively smaller.
  • the surface pressure should be kept approximately the same in the known case.
  • EP-A-0 595 417 For example, there has been known a drawing tool for deep drawing of blanks, comprising a pulling bell, a pulling core, a fold holder or a pneumatic spring which applies a spring force to the fold holder.
  • the invention has for its object to provide an apparatus for deep drawing of flat blanks to cup-shaped, flangeless moldings, wherein the blanks are stamped from painted or sheet material coated with sheet material to create, in which the formation of enamel hairs and similar phenomena is avoided.
  • the spring force on the fold holder is reduced spontaneously to essentially zero.
  • the device according to the invention is based on the knowledge that during the blanking of the blanks from the sheet material lacquer or foil in the edge region is detached from the base material.
  • the blanking of the blanks takes place either in advance or simultaneously with the deep drawing by the Tiefziehglocke accomplished the punching process.
  • the pleat holder comes into contact with this detached edge region of the coating and causes no "chewing effect" at the moment in which the sheet to be drawn leaves the pleat holder. This causes in this way a more or less strong destruction of this detached edge region, which leads to the formation of paint hair already mentioned several times.
  • the spring force on the pen holder is made substantially zero, and indeed within a very short time, in e.g. Milliseconds.
  • the time at which the spring force is eliminated at the fold holder will be determined by the position of the fold holder or the bell. It is understood that this position depends on the geometry of the molded article to be produced.
  • the spring force at the pleat holder by a pneumatic force, for example by a gas cushion closed by a piston, which in turn abuts the pleat holder via suitable force transfer means.
  • the gas cushion is vented to the atmosphere when the spring force is to be eliminated.
  • the spring force is successively reduced during the drawing process to achieve approximately constant surface pressure between the fold holder and edge molding.
  • the spring force is allowed to increase linearly during the drawing process until spontaneous omission. This is automatically the case when the volume of a gas cushion during the drawing process is continuously reduced.
  • the surface pressures are increased during the drawing process, but this partially compensates for the phenomenon that with increasing deformation of the edge region of this thicker and thus a higher spring force is required to counteract the formation of wrinkles.
  • the pneumatic spring is formed by a gas volume in a chamber which is closed by a piston.
  • the piston in turn acts via force transfer elements on the pleat holder, and the chamber is associated with a vent valve, which is actuated when the piston has reached a predetermined lower position, whereby the chamber is vented abruptly.
  • the vent valve, a rod or a lever may be assigned, which is arranged in the chamber and actuated by the piston.
  • a pressure source is provided which is connectable via a vent valve with the chamber.
  • a control device actuates the vent valve after completion of the drawing process. As a result, the piston and the pleat holder are automatically adjusted to an upper position and are ready for the next drawing process.
  • a not necessarily circular blank 10 in FIG. 1 consists of a base material 12 and a coating 14.
  • the base material is for example made of steel or aluminum sheet.
  • the coating 14 is a paint, a plastic film or the like.
  • At 16 it is shown how the coating on the edge of the blank has detached from the base material 12. Such a process occurs during the blanking of the blank 10 from the coated sheet material.
  • thermoforming tool after FIG. 2 has a cylindrical pulling core 18, for example, a cylindrical annular bell 20 and an annular disk-shaped fold holder 22.
  • a cylindrical pulling core 18 is stationary, for example, while the pulling bell 20 by means of a suitable Pressing device, for example, a plunger of an eccentric press is coupled.
  • the pleat holder 22 is in contact at the bottom with power transmission elements 24, which are part of a spring device.
  • the force acting on the force transmission elements 24 spring forces are in FIG. 2 indicated at 26.
  • FIG. 2 is indicated how the blank 10 is deep-drawn by the edge region by means of the drawing bell 20 is increasingly formed around the draw core 18 around.
  • the fold holder 22 abuts against the "inside" of the molding and prevents the formation of wrinkles in the edge region because of the reduction in the diameter of the material. Structure and function of such a drawing tool are well known.
  • FIG. 3 are the power transmission elements 24 after FIG. 2 can be seen, which cooperate with a piston 28 which sits sealed in a cylindrical chamber 30.
  • the chamber 30 is filled with gas, for example air, preferably under a predetermined pressure. If the fold holder 22 after FIG. 2 moves downward during the drawing operation, the piston 28 moves into the chamber 30 and compresses the gas cushion, whereby the spring force at the fold holder 22 increases approximately linearly.
  • FIG. 4 indicated by a characteristic curve 32, in which the spring force is indicated as a function of the travel of the piston 28 and the fold holder 22.
  • a characteristic 34 would be obtained if - as in the prior art mentioned above - the spring force would be reduced continuously as the volume displacement in the chamber 30 progresses.
  • FIG. 3 is indicated that the bottom of the chamber at 36 has an opening which is normally closed by a valve disc 38 which is biased by a spring 40 in the closed position.
  • the valve plate 38 is provided with an actuating rod 42 which projects into the chamber 30, approximately perpendicular to the extension of the piston 28. Reaches the piston 28, the rod 42, the valve 38 is opened, and the air in the chamber 30 can relax abruptly, so that within milliseconds the spring force 26 is eliminated at the fold holder 22.
  • the rod is dimensioned to be actuated by the piston 28 when the squeeze-holder (s) 22 are immediately before their final position during the drawing operation.
  • the chamber 30 is connected via a connection 44 to a pressure source 46 via a valve 48.
  • the valve 48 is actuated by a control device 50 which receives on the one hand via a pressure gauge 52, a pressure signal corresponding to the pressure in the chamber 30, and further receives a further signal above 54, which indicates when the drawing process is completed and the pulling bell 20th is moved back to the starting position.
  • the valve 48 is opened so that the pressure source 46, the chamber 30 can refill with gas predetermined pressure.

Claims (3)

  1. Outil d'emboutissage pour l'emboutissage de pièces brutes qui sont découpées à partir de coulée de tôle laquée ou revêtue d'un matériau de film, pour donner des ébauches sans collerette, avec une cloche d'emboutissage, un noyau d'emboutissage, un serre-flan et un ressort pneumatique, qui applique une force de ressort sur le serre-flan, caractérisé en ce que le ressort pneumatique est formé par un volume gazeux dans une chambre (30), qui est fermée de manière étanche par un piston (28), qui de son côté appuie contre le serre-flan (22) par le biais d'éléments de transmission de force (24) et est attribuée à la chambre (30) une soupape de purge d'air (38) qui est actionnée quand le piston (28) a atteint une position inférieure prédéfinie, ce par quoi la chambre (30) est purgée soudainement.
  2. Outil d'emboutissage selon la revendication 1, caractérisé en ce que la soupape de purge d'air (38) peut être couplée à une tige ou un levier qui dépasse dans la chambre (30) et peut être actionné(e) par le piston (28).
  3. Outil d'emboutissage selon la revendication 1 ou 2, caractérisé en ce qu'est prévue une source de pression (46) qui peut être raccordée à la chambre (30) par une soupape d'aération (48), et un dispositif de commande (50) est prévu pour l'actionnement de la soupape d'aération (48) après la fin du processus d'emboutissage.
EP07856204A 2007-02-01 2007-11-21 Procédé et dispositif pour l'emboutissage de pièces brutes de coulée en tôle pour donner des ébauches sans collerette Active EP2125264B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07856204T PL2125264T3 (pl) 2007-02-01 2007-11-21 Sposób i urządzenie do głębokiego ciągnienia półfabrykatów z materiału blaszanego w wytłoczki pozbawione kołnierza

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007005011A DE102007005011B4 (de) 2007-02-01 2007-02-01 Verfahren und Ziehwerkzeug zum Tiefziehen von Rohlingen aus Blechmaterial zu flanschlosen Formlingen
PCT/EP2007/010053 WO2008092486A1 (fr) 2007-02-01 2007-11-21 Procédé et dispositif pour l'emboutissage de pièces brutes de coulée en tôle pour donner des ébauches sans collerette

Publications (2)

Publication Number Publication Date
EP2125264A1 EP2125264A1 (fr) 2009-12-02
EP2125264B1 true EP2125264B1 (fr) 2010-07-21

Family

ID=39149212

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07856204A Active EP2125264B1 (fr) 2007-02-01 2007-11-21 Procédé et dispositif pour l'emboutissage de pièces brutes de coulée en tôle pour donner des ébauches sans collerette

Country Status (16)

Country Link
US (1) US9283611B2 (fr)
EP (1) EP2125264B1 (fr)
JP (1) JP5141921B2 (fr)
CN (1) CN101678428B (fr)
AT (1) ATE474677T1 (fr)
AU (1) AU2007345439B2 (fr)
BR (1) BRPI0721214B1 (fr)
CA (1) CA2676966C (fr)
DE (2) DE102007005011B4 (fr)
DK (1) DK2125264T3 (fr)
ES (1) ES2345298T3 (fr)
MX (1) MX2009008098A (fr)
PL (1) PL2125264T3 (fr)
PT (1) PT2125264E (fr)
RU (1) RU2448799C2 (fr)
WO (1) WO2008092486A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015113267A1 (de) 2015-08-12 2017-02-16 Rainer Naroska Verpackungsmaschinen Gmbh & Co. Kg Tiefziehwerkzeug zum Tiefziehen von Rohlingen
WO2019034386A1 (fr) 2017-08-15 2019-02-21 Neoform Flensburg Gmbh & Co. Kg Outil d'emboutissage profond et procédé d'emboutissage profond d'ébauches

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DE102007005011B4 (de) * 2007-02-01 2012-09-06 Saeta Gmbh & Co. Kg Verfahren und Ziehwerkzeug zum Tiefziehen von Rohlingen aus Blechmaterial zu flanschlosen Formlingen
ITMC20080229A1 (it) * 2008-12-22 2010-06-23 Beltrani Alfio Procedimento per la lavorazione di lastre metalliche, al fine di ottenere manufatti bombati e verniciati.
EP2744659B1 (fr) 2011-08-19 2018-04-11 3M Innovative Properties Company Procédé de formation de tôle emboutie recouverte d'un film de peinture
US10682681B2 (en) * 2013-07-03 2020-06-16 Nippon Steel Corporation Press forming apparatus and press forming method
CN103978085B (zh) * 2014-04-08 2016-01-20 江门市新会区同达化工机械制造有限公司 一种冲压成形方法
DE102016104375A1 (de) * 2016-03-10 2017-09-14 Pester Pac Automation Gmbh Vorrichtung und Verfahren zum Betrieb der Vorrichtung

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015113267A1 (de) 2015-08-12 2017-02-16 Rainer Naroska Verpackungsmaschinen Gmbh & Co. Kg Tiefziehwerkzeug zum Tiefziehen von Rohlingen
WO2017025181A1 (fr) * 2015-08-12 2017-02-16 Rainer Naroska Verpackungsmaschinen Gmbh & Co. Kg Outil d'emboutissage profond et procédé d'emboutissage profond pour l'emboutissage profond de préformes
US11318518B2 (en) 2015-08-12 2022-05-03 Rainer Naroska Engineering Gmbh Deep drawing tool and deep drawing process for deep drawing blanks
WO2019034386A1 (fr) 2017-08-15 2019-02-21 Neoform Flensburg Gmbh & Co. Kg Outil d'emboutissage profond et procédé d'emboutissage profond d'ébauches
DE102017118559A1 (de) 2017-08-15 2019-02-21 Neoform Flensburg Gmbh & Co. Kg Tiefziehwerkzeug zum Tiefziehen von Rohlingen

Also Published As

Publication number Publication date
DE502007004524D1 (de) 2010-09-02
RU2009132665A (ru) 2011-03-10
CN101678428B (zh) 2012-05-30
MX2009008098A (es) 2009-12-14
BRPI0721214A2 (pt) 2014-03-18
AU2007345439B2 (en) 2014-09-04
DK2125264T3 (da) 2010-11-15
ATE474677T1 (de) 2010-08-15
ES2345298T3 (es) 2010-09-20
US9283611B2 (en) 2016-03-15
CN101678428A (zh) 2010-03-24
US20100139357A1 (en) 2010-06-10
DE102007005011A1 (de) 2008-08-14
AU2007345439A1 (en) 2008-08-07
JP5141921B2 (ja) 2013-02-13
PT2125264E (pt) 2010-08-02
WO2008092486A1 (fr) 2008-08-07
CA2676966A1 (fr) 2008-08-07
DE102007005011B4 (de) 2012-09-06
EP2125264A1 (fr) 2009-12-02
BRPI0721214B1 (pt) 2019-04-30
RU2448799C2 (ru) 2012-04-27
CA2676966C (fr) 2012-05-22
JP2010517778A (ja) 2010-05-27
PL2125264T3 (pl) 2010-12-31

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