EP0012702A1 - Procédé et dispositif pour emboutissage hydromécanique - Google Patents

Procédé et dispositif pour emboutissage hydromécanique Download PDF

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Publication number
EP0012702A1
EP0012702A1 EP79420066A EP79420066A EP0012702A1 EP 0012702 A1 EP0012702 A1 EP 0012702A1 EP 79420066 A EP79420066 A EP 79420066A EP 79420066 A EP79420066 A EP 79420066A EP 0012702 A1 EP0012702 A1 EP 0012702A1
Authority
EP
European Patent Office
Prior art keywords
ring
blank
liquid
stamping
punch
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Withdrawn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
EP79420066A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jacques Baril
Jean-Yves Gaborieau
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.)
Rio Tinto France SAS
Original Assignee
Aluminium Pechiney SA
Societe de Vente de lAluminium Pechiney SA
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 Aluminium Pechiney SA, Societe de Vente de lAluminium Pechiney SA filed Critical Aluminium Pechiney SA
Publication of EP0012702A1 publication Critical patent/EP0012702A1/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Withdrawn legal-status Critical Current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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/205—Hydro-mechanical deep-drawing

Definitions

  • the present invention relates to an improvement to the method of stamping in a liquid matrix and to a device allowing the implementation of the method.
  • stamping consists in mechanically deforming a flat element called a blank using a punch and a die to obtain an object in the form of a case or bucket.
  • the punch pushes back the central part of the blank at the bottom of the matrix and drives the edge of the blank or flange which is "swallowed" in the space between punch and matrix.
  • the collar most often circular of maximum diameter (F), thus forms the cylindrical side wall of the object of diameter (D) corresponding to that of the punch.
  • the flange must be initially applied to the upper flat face of the matrix by a blank holder.
  • the metallic matrix is replaced by a chamber filled with liquid in which the blank can sink when it is pushed back by the punch.
  • the liquid pressurizes and applies the blank against the surface of the punch during its movement.
  • the pressurized liquid thus acts as a matrix.
  • the blank flange must however be mechanically guided during its deformation.
  • the upper free section of the chamber is closed by a drawing ring comprising an opening whose section corresponds to that of the stamped object, that is to say the largest section of the punch increased by the thickness of the blank, with the clearance required to allow passage of the flange metal when it is driven to form the side wall of the object.
  • the level of the liquid must be exactly flush with the upper level of the ring.
  • the blank placed on the ring at the start of the stamping operation thus very exactly flushes the level of the liquid without leaving any air pocket.
  • the blank flange is tightened on the ring by a blank holder.
  • the pressure in the chamber and the leak rate are determined at all times by the speed of descent of the punch, the clamping pressure of the blank holder and the width of the flange portion which remains applied against the blank holder forming the joint.
  • the punch must drive the flange in the chamber very regularly and symmetrically to form the side wall of the stamped part.
  • the flange must therefore be tightened and braked under the blank holder very regularly during its deformation. It is important to carefully clean the surface of the ring as well as that of the blank holder, this to remove any drop of liquid which would cause irregularity, and even often break the blank.
  • the blank must be lubricated very homogeneously to facilitate its sliding against the ring and the blank holder, this from the start of stamping, before the liquid escapes between ring and collar and serve as a lubricant.
  • the pressures in the chamber are generally very high, of the order of 1000 bars, which increases the power demanded of the press.
  • the process which is the subject of the invention overcomes the various drawbacks of stamping in a liquid matrix while retaining all of its advantages.
  • This process consists in not making the level of liquid coincide at the start of the drawing operation with the upper plane of the ring, but, on the contrary, in maintaining this level above that of the drawing ring and even above the blank. The blank is thus completely submerged from the start of stamping.
  • the blank being constantly submerged, it is the pressurizing liquid which ensures lubrication between the blank and ring from the start of the drawing.
  • the liquid can be simply water or, preferably, a dilute solution of soluble oil.
  • the blank being completely submerged, there is no fear that it will remain below drops or pockets of liquid or air causing tensions asymmetrical when lowering the punch. Wiping surfaces is unnecessary.
  • the blank being completely submerged, an absolutely perfect horizontality of the ring or a rigorous adjustment of the liquid level is not necessary. It is not useful to grease the blank.
  • the pressure chamber and its drawing ring can be simply immersed in a tank filled with liquid.
  • the liquid expelled from the pressure chamber by the punch naturally overflows into the tank.
  • the liquid then naturally returns by gravity to the chamber at the end of the operation, when the punch is raised and the manufactured object is expelled. It is obvious, however, that, for particularly delicate stampings, or very fast production rates, the transfer of liquid and its pressure in the chamber can be controlled by pump.
  • the solution is to produce a centering device with respect to the ring and in which the blank comes to be embedded with a very slight clearance.
  • This device can simply be a centering ring, of thickness greater than the height of liquid above the above the drawing ring so as to emerge from the liquid.
  • This centering ring must include.-gutters or radial communication holes to allow good equalization of the liquid levels inside and outside at all times.
  • the centering device must be securely attached to the drawing ring, for example by a concentric fitting.
  • the height (h) between the lower generatrices of the channels or holes and the surface of the ring will preferably be greater than the thickness (e) of the blank.
  • Figure 1 shows, in section, a stamping tool comprising a centering ring according to the invention. This figure is cut in half along the axis XX '.
  • the half-figure on the left represents the tool at the start of stamping, the half-figure on the right represents the same tool at the end of stamping.
  • Figure 2 shows a detail of the tool which has been added an ejector.
  • the level (11) of the liquid having stamped is above the upper plane of the stamping ring (2) and even of the blank (10) which is completely submerged.
  • This blank is centered by a centering ring (12) according to the invention.
  • the lateral clearance of the blank (10) in the ring (12) is only a few tenths of a millimeter.
  • the ring (12) has eight radial holes (13) which allow the liquid levels inside and outside of the ring to equalize constantly, this although in the rest position the upper face (14 ) from the centering ring (12) emerges from the liquid (3) as shown in the left half-figure.
  • the blank holder (7) to play its role, it must have a central allowance (15) which fits together with a play of a few tenths in the centering ring (12).
  • the ring (12) is itself fixed according to a fitting (16) on the drawing ring.
  • the liquid discharged from the pressure chamber (1) cannot escape directly to the tank (4) but must follow a winding path comprising a vertical portion first between the blank (10) and the ring (12) then between the blank holder (7) and the ring (12) before exiting towards the tank (4) through the holes (13).
  • This rupture of the film would cause metal to metal contact between the blank (10) and the ring (2). It would therefore cause the breakage of the blank in the area where the deformation begins, giving rise to the skirt of the part (17).
  • the stamped part (17) is a solid of revolution around the axis XX ', but by the process it is also possible to obtain objects the section of which by horizontal planes n is not circular, for example rectangular with rounded edges.
  • the pressure chamber (1) finally has a drain opening (18) which can also be used for pump-controlled filling.
  • the pressure rises rapidly in the chamber (1); the liquid (3) applies the blank (10) against the punch (5) and escapes under the collar (9) by applying it against the blank holder (7). It raises the level in the tank (4) to (11 ').
  • the part (17) can then be ejected by any device, for example a spring device fixed to the bottom of the chamber (1).
  • Stamping can be carried out very quickly without risk of bad centering, faulty filling of the chamber, or defective lubrication of the blank.
  • radial holes (13) are advantageous to make radial holes (13) as numerous and wide as possible. It can be open channels at the upper part of the ring (12). It suffices that the upper face (14) of the ring (12) is visible so that the establishment of the blank is easy.
  • the metal used was an aluminum alloy quality 3003.
  • an ejector in the form of a cylindrical ring (19) similar to that shown in partial section in FIG. 2.
  • This ejector (19) is applied from the start of stamping against the blank (10) opposite the punch (5) and accompanies the bottom of the case (17) during its descent into the chamber (1). Thanks to the seals (20) and (21), there is no liquid neither pressure between the blank (10) and the ejector (19) on a circle of diameter (d) inside the seal (21), The punch (5) has to overcome only the pressure exerted on an inner diameter (d) and outer diameter (D) crown.
  • the ejector (19) is raised by ejecting the part (17).
  • a liquid pressure limiter or regulator can be provided connected to an orifice such as the orifice (18) passing through the wall of the chamber (1).
  • This process avoids greasing the blank before stamping and degreasing the part after stamping.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP79420066A 1978-12-11 1979-12-06 Procédé et dispositif pour emboutissage hydromécanique Withdrawn EP0012702A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7835301A FR2443888A1 (fr) 1978-12-11 1978-12-11 Emboutissage en matrice liquide
FR7835301 1978-12-11

Publications (1)

Publication Number Publication Date
EP0012702A1 true EP0012702A1 (fr) 1980-06-25

Family

ID=9216151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79420066A Withdrawn EP0012702A1 (fr) 1978-12-11 1979-12-06 Procédé et dispositif pour emboutissage hydromécanique

Country Status (10)

Country Link
US (1) US4314468A (OSRAM)
EP (1) EP0012702A1 (OSRAM)
JP (1) JPS5581025A (OSRAM)
BE (1) BE880561A (OSRAM)
CH (1) CH632682A5 (OSRAM)
ES (1) ES486718A1 (OSRAM)
FR (1) FR2443888A1 (OSRAM)
GR (1) GR66520B (OSRAM)
IT (1) IT1126540B (OSRAM)
LU (1) LU81978A1 (OSRAM)

Families Citing this family (21)

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Publication number Priority date Publication date Assignee Title
JPS58181431A (ja) * 1982-04-20 1983-10-24 Kazuhiko Nakamura 周液圧重畳式対向液圧成形法
JPS60133933A (ja) * 1983-12-21 1985-07-17 Honda Motor Co Ltd プレス成形法
US5353618A (en) 1989-08-24 1994-10-11 Armco Steel Company, L.P. Apparatus and method for forming a tubular frame member
US4989482A (en) * 1989-11-17 1991-02-05 Ti Corporate Services Limited Method and apparatus for punching a hole in sheet material
US5157969A (en) * 1989-11-29 1992-10-27 Armco Steel Co., L.P. Apparatus and method for hydroforming sheet metal
DE19928422A1 (de) * 1999-06-23 2000-12-28 Mueller Weingarten Maschf Presse zum Außenhochdruckformen
KR100345288B1 (ko) * 1999-07-06 2002-07-25 한국과학기술연구원 무금형 성형장치
EP1292405B1 (en) * 2000-06-19 2005-12-07 CROWN Packaging Technology, Inc. Drive for a hold down assembly of a can bodymaker and method of use thereof
US6631630B1 (en) * 2000-09-22 2003-10-14 Board Of Trustees Of Michigan State University Hydroforming of composite materials
DE10110161A1 (de) * 2001-03-02 2003-01-02 Audi Ag Umformwerkzeug zum hydromechanischen Tiefziehen von Werkstücken aus Blechzuschnitten
AT4663U3 (de) * 2001-03-16 2002-03-25 Hmt Umformtechnik Engineering Einrichtung zur herstellung von werkstücken an presseinrichtungen
DE10205393B4 (de) * 2002-02-09 2010-10-07 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Ziehen eines Blechbauteils
JP2006212695A (ja) * 2005-02-07 2006-08-17 Toyota Motor Corp 液圧成形装置および液圧成形方法
US7266982B1 (en) * 2005-06-10 2007-09-11 Guza David E Hydroforming device and method
US7614270B2 (en) * 2008-02-14 2009-11-10 Ford Global Technologies, Llc Method and apparatus for superplastic forming
US8596106B2 (en) * 2008-05-21 2013-12-03 The Hong Kong Polytechnic University Isothermal forming system for production of sheet metal parts
US8534106B2 (en) * 2009-10-19 2013-09-17 Ford Global Technologies, Llc Hydromechanical drawing process and machine
RU2486025C1 (ru) * 2011-12-14 2013-06-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный технологический университет "СТАНКИН"" (ФГБОУ ВПО МГТУ "СТАНКИН") Способ изготовления полых деталей
US20140020534A1 (en) * 2012-07-17 2014-01-23 National Taiwan Ocean University Fine hydro-blanking device
US9713833B2 (en) * 2015-09-20 2017-07-25 Ahmad Shirazi Hydro ironing
CN116351938B (zh) * 2023-03-16 2024-03-19 江阴市伦一金属制品有限公司 一种汽车驱动电机用高强度无取向硅钢片的生产工艺及设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3286496A (en) * 1961-07-07 1966-11-22 Siemens Elektrogeraete Gmbh Apparatus for hydraulic deep-drawing of sheet metal
GB1142311A (en) * 1965-02-17 1969-02-05 Rheinmetall Gmbh Improvements in or relating to smoke cartridges and to methods and apparatus for producing containers for said cartridges
FR1561102A (OSRAM) * 1966-09-09 1969-03-28
FR2124624A1 (OSRAM) * 1971-02-10 1972-09-22 Western Electric Co
BE852015A (fr) * 1977-03-02 1977-07-01 Centre Rech Metallurgique Perfectionnements aux procedes d'emboutissage de materiaux metalliques tels que des toles en acier

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3020633A (en) * 1959-04-24 1962-02-13 Olin Mathieson Fabrication of hollow articles
US3383891A (en) * 1965-10-20 1968-05-21 Robert C. Geitz Superhydraulic forging method and apparatus
US3516274A (en) * 1967-02-15 1970-06-23 Stanley Lewis Graham Method and device for shaping metal
DE1777153C3 (de) * 1968-09-12 1974-05-09 Siemens-Electrogeraete Gmbh, 1000 Berlin U. 8000 Muenchen Vorrichtung zum hydromechanischen Tiefziehen
US3748887A (en) * 1971-10-01 1973-07-31 Ladish Co Method and apparatus for locating stock in forming dies
US3769824A (en) * 1972-06-14 1973-11-06 Armco Steel Corp Deep drawing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3286496A (en) * 1961-07-07 1966-11-22 Siemens Elektrogeraete Gmbh Apparatus for hydraulic deep-drawing of sheet metal
GB1142311A (en) * 1965-02-17 1969-02-05 Rheinmetall Gmbh Improvements in or relating to smoke cartridges and to methods and apparatus for producing containers for said cartridges
FR1561102A (OSRAM) * 1966-09-09 1969-03-28
FR2124624A1 (OSRAM) * 1971-02-10 1972-09-22 Western Electric Co
BE852015A (fr) * 1977-03-02 1977-07-01 Centre Rech Metallurgique Perfectionnements aux procedes d'emboutissage de materiaux metalliques tels que des toles en acier

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MACHINE MODERNE, Septembre 1966, Paris FR E. BURCK: "Le procede d'emboutissage hydromecanique", pages 17-23. * L'ensemble de l'article * *

Also Published As

Publication number Publication date
IT1126540B (it) 1986-05-21
FR2443888B1 (OSRAM) 1982-03-26
GR66520B (OSRAM) 1981-03-24
LU81978A1 (fr) 1980-07-01
JPS5581025A (en) 1980-06-18
ES486718A1 (es) 1980-06-16
BE880561A (fr) 1980-06-11
IT7927958A0 (it) 1979-12-07
CH632682A5 (fr) 1982-10-29
FR2443888A1 (fr) 1980-07-11
US4314468A (en) 1982-02-09

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE GB NL SE

17P Request for examination filed
STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19820705

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BARIL, JACQUES

Inventor name: GABORIEAU, JEAN-YVES