EP3292920A1 - Procédé de production d'un objet à partir d'un produit semi-fini d'un métal léger ou d'un alliage de métal léger - Google Patents

Procédé de production d'un objet à partir d'un produit semi-fini d'un métal léger ou d'un alliage de métal léger Download PDF

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Publication number
EP3292920A1
EP3292920A1 EP16187695.8A EP16187695A EP3292920A1 EP 3292920 A1 EP3292920 A1 EP 3292920A1 EP 16187695 A EP16187695 A EP 16187695A EP 3292920 A1 EP3292920 A1 EP 3292920A1
Authority
EP
European Patent Office
Prior art keywords
finished product
liquid medium
light metal
cryogenic
producing
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Withdrawn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
EP16187695.8A
Other languages
German (de)
English (en)
Inventor
Daniel Vipavc
Martin Sebastian SCHNALL
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.)
LKR Leichtmetallkompetenzzentrum Ranshofen GmbH
Original Assignee
LKR Leichtmetallkompetenzzentrum Ranshofen GmbH
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 LKR Leichtmetallkompetenzzentrum Ranshofen GmbH filed Critical LKR Leichtmetallkompetenzzentrum Ranshofen GmbH
Priority to EP16187695.8A priority Critical patent/EP3292920A1/fr
Publication of EP3292920A1 publication Critical patent/EP3292920A1/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Withdrawn legal-status Critical Current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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/053—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure characterised by the material of the blanks
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/021—Deforming sheet bodies
    • B21D26/027—Means for controlling fluid parameters, e.g. pressure or temperature
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/041—Means for controlling fluid parameters, e.g. pressure or temperature
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/92—Making other particular articles other parts for aircraft

Definitions

  • the invention concerns a method for producing a structured object from a half-finished product of a light metal or light metal alloy.
  • the automotive and the airplane industries are both in constant search for lightweight materials and their implementation strategies in order to reduce an overall vehicle or airplane weight.
  • Successful implementation of lightweight materials in the transportation industries would bring significant weight saving benefits to meet demands for enhancement of fuel efficiency and dynamic performance like reduction of greenhouse gases and also lowering transportation costs.
  • aluminum and/or magnesium alloys are increasingly chosen materials by design engineers as such lightweight metal alloys could retain rigidity and strength needed for structural applications.
  • a method for producing a structured object from a half-finished product of a light metal or light metal alloy by forming the half-finished product with an at least partly liquid medium is provided, wherein the liquid medium is brought into contact with the half-finished product below a temperature of 0°C of the liquid medium and wherein the liquid medium is set under pressure in order to form the structured object from the half-finished product.
  • a method according to the invention allows for producing an object from al light metal alloy by route analogously to hydroforming with a very low operational effort.
  • the object is preferably a component for use in automotive or airplane industry and may be made from a half-finished sheet or a half-finished tube. This method is free of dangerous wastes such as oil, emulsions or other substances which are harmful to the environment.
  • the half-finished product is in direct contact with a cryogenic liquid medium like nitrogen during part or preferably the whole forming process, a maximal formability and work hardening can be exploited without any special tooling because of the cooling effect. Further, the method according to the invention allows optimal conditions for exploiting the whole forming potential of the half-finished product made of a light metal alloy.
  • the half-finished product made of a light metal alloy is formed to an object by forming with a liquid medium at usually low temperatures, in particular below 0°C, preferably below - 40°C, in particular below -100°C, like -150°C or lower.
  • the half-finished product is placed into a negative mold which is shaped on the inner surface in a way the object should finally look like.
  • the half-finished product is constantly contacted by the liquid medium whereby it is cooled before and, if applicable, during the hydroforming process.
  • the half-finished product made of a light metal alloy is formable to an object which is usable as an automotive component or a component for another use. To form the object the half-finished product is pressed towards the negative mold by the liquid cryogenic medium.
  • the liquid medium is usually pressurized up to 1000 bar, in particular up to 3000 bar.
  • the hydroforming process is performed with a high or ultra-high pressurized cryogenic medium.
  • the high pressure can be established with one or more special cryogenic high pressure pumps.
  • the cryogenic liquid medium can be compressed mechanically by at least one pump.
  • the cryogenic liquid medium can also be heated in order to increase the pressure exerted by the liquid medium.
  • the pressure of the cryogenic medium is raised when the cryogenic medium is heated.
  • the high pressure is therefore established thermodynamically. Heating the cryogenic medium can produce a pressure of up to 650 bar or more.
  • the producible pressure depends on the nature of the liquid medium and the elevated temperature.
  • the elevated temperature is usually established by a heating element within the forming mold. Additionally, the thermodynamically produced pressure can be further increased mechanically by a high pressure pump.
  • the cryogenic medium In order to form the half-finished product, the cryogenic medium is usually compressed by a high pressure pump. When the cryogenic medium wants to expand again in the mold, the half-finished product is pressed and formed against an inner surface of the negative mold or a die respectively and the object is formed. Because of the constant cooling of the half-finished product made of a light metal alloy the formability and work hardening of the alloy is increased and a substantially crack free object can be produced.
  • the liquid medium is liquid nitrogen.
  • Liquid helium, liquid hydrogen or liquid neon is a possible alternative. Therefore, the object is particularly formed below a temperature of-150°C, in particular below-190°C.
  • the half-finished product is cooled during the whole forming process by the liquid medium.
  • the cryogenic liquid medium is in direct contact with the light metal alloy during the whole forming process so that the formability of this alloy is increased.
  • the cryogenic liquid medium is pressurized whereby the half-finished product is pressed into a negative mold under constant contact with the cryogenic medium.
  • the method according to the invention can be applied to half-finished products of different shapes.
  • the method is useful for forming half-finished products being sheets.
  • the sheet is usually made from an aluminum alloy or a magnesium alloy.
  • the cryogenic liquid medium is constantly contacting and therefore also cooling the sheet on one side. Further, the cryogenic medium is pressing the sheet into a negative mold when the medium is pressurized.
  • the method can further be applied to form two sheets at the same time.
  • the cryogenic medium is arranged between to mainly parallel ordered sheets, i.e. a double-sheet. When the cryogenic medium is compressed the sheets are pressed in diverging directions into two negative parts of a mold and two objects are formed simultaneously.
  • the method is also useful when the half-finished product is a tube.
  • the cryogenic liquid medium is arranged inside the tube and is under permanent contact with the whole inside surface of the tube, wherein the cryogenic medium is also cooling the tube.
  • the tube is preferably formed from an aluminum or magnesium alloy. When the cryonic liquid medium is compressed the tube is pressed into a negative mold and an object is formed.
  • the method is applied to form an automotive component or an airplane component.
  • Fig. 1 a and 1 b flow curves of a work hardening behavior ( Fig. 1 a) and formability ( Fig. 1 b) of aluminum alloy AA-5182 are shown. It can be seen that the work hardening behavior as well as the formability is enhanced at cryogenic temperatures. The lower the temperature, the better are the work hardening and the formability of the aluminum alloy. A same or similar behavior can be observed for other aluminum alloys and also magnesium alloys. This leads to the conclusion that in order to produce objects for the automotive or airplane industry a forming process should be performed at low temperatures.
  • Fig. 2 shows a sectional view through an apparatus for producing an object 1 from a half-finished product 2.
  • the half-finished product 2 is a sheet.
  • the half-finished product 2 is placed inside a negative mold 5.
  • the half-finished product 2 is pressed in the mold 5 by a cryogenic liquid medium 3 like liquid nitrogen.
  • the cryogenic medium 3 is preferably a liquid medium at very low temperature of -150°C or lower. Therefore, the half-finished product 2 is cooled during the forming process which increases the formability of the light metal alloy half-finished product 2.
  • the hydroforming process is performed under a high pressure, for which the cryogenic liquid medium 3 is pressurized.
  • the high pressure is preferably established thermodynamically in combination with a high pressure pump 4.
  • the cryogenic medium 3 is heated with a heating element 6, whereby a pressure of up to 650 bar can be applied in the forming process.
  • the pressure is further increased by the high pressure pump 4.
  • As the cryonic liquid medium 3 is pressurized the half-finished product 2 is pressed into the mold 5 by the cryogenic liquid medium 3.
  • the object 1 is thus produced.
  • the corresponding object 1 is depicted in Fig. 3 showing the form of the part.
  • Fig. 4 depicts a sectional view through another apparatus for producing an object 1 from a half-finished product 2 which is constructed to produce simultaneously two objects 1 from two half-finished sheets.
  • the cryogenic liquid medium 3 is injected between the sheets and the sheets are pressed towards an inner surface of the molds 5 when the liquid medium 3 is pressurized.
  • a high pressure pump 4 and a heating element 6 to pressurize the cryogenic medium 3.
  • Fig. 5 shows a sectional view through another apparatus for producing an object 1 from a half-finished product 2.
  • the half-finished product 2 is a tube and the cryogenic liquid medium 3 is injected in the middle of the tube.
  • the cryogenic liquid medium 3 is pressurized thermodynamically by a heating element 6 and further with a high pressure pump 4. Consequently the half-finished tube is pressed outwardly in a negative mold 5, whereby the object 1 is formed.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP16187695.8A 2016-09-07 2016-09-07 Procédé de production d'un objet à partir d'un produit semi-fini d'un métal léger ou d'un alliage de métal léger Withdrawn EP3292920A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16187695.8A EP3292920A1 (fr) 2016-09-07 2016-09-07 Procédé de production d'un objet à partir d'un produit semi-fini d'un métal léger ou d'un alliage de métal léger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16187695.8A EP3292920A1 (fr) 2016-09-07 2016-09-07 Procédé de production d'un objet à partir d'un produit semi-fini d'un métal léger ou d'un alliage de métal léger

Publications (1)

Publication Number Publication Date
EP3292920A1 true EP3292920A1 (fr) 2018-03-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16187695.8A Withdrawn EP3292920A1 (fr) 2016-09-07 2016-09-07 Procédé de production d'un objet à partir d'un produit semi-fini d'un métal léger ou d'un alliage de métal léger

Country Status (1)

Country Link
EP (1) EP3292920A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10960452B2 (en) * 2018-11-19 2021-03-30 Dalian University Of Technology Method for pressure forming of aluminum alloy special-shaped tubular component by using ultra low temperature medium
CN113843333A (zh) * 2021-09-27 2021-12-28 哈尔滨工业大学 一种低温冷却控制下的金属板材电磁成形装置及方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3266946A (en) * 1962-05-11 1966-08-16 Antoine Methods of shaping metal expansion bellows
US4159217A (en) * 1976-03-31 1979-06-26 Union Carbide Corporation Cryogenic forming
JPS63130224A (ja) * 1986-11-20 1988-06-02 Kawamura Seikan Kogyo Kk 管成形方法
JPH08112626A (ja) * 1994-10-13 1996-05-07 Nissan Motor Co Ltd 対向液圧成形方法及び液圧成形用金型装置及びプレス機械及びバルジ液圧成形方法
DE102012015320A1 (de) * 2012-08-02 2014-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Kombination aus einem Umformwerkzeug und einer Messvorrichtung, Verfahren zum Messen einer physikalischen Größe eines Wirkmediums in einem Umformwerkzeug und Messvorrichtung zur Durchführung des Verfahrens

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3266946A (en) * 1962-05-11 1966-08-16 Antoine Methods of shaping metal expansion bellows
US4159217A (en) * 1976-03-31 1979-06-26 Union Carbide Corporation Cryogenic forming
JPS63130224A (ja) * 1986-11-20 1988-06-02 Kawamura Seikan Kogyo Kk 管成形方法
JPH08112626A (ja) * 1994-10-13 1996-05-07 Nissan Motor Co Ltd 対向液圧成形方法及び液圧成形用金型装置及びプレス機械及びバルジ液圧成形方法
DE102012015320A1 (de) * 2012-08-02 2014-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Kombination aus einem Umformwerkzeug und einer Messvorrichtung, Verfahren zum Messen einer physikalischen Größe eines Wirkmediums in einem Umformwerkzeug und Messvorrichtung zur Durchführung des Verfahrens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10960452B2 (en) * 2018-11-19 2021-03-30 Dalian University Of Technology Method for pressure forming of aluminum alloy special-shaped tubular component by using ultra low temperature medium
CN113843333A (zh) * 2021-09-27 2021-12-28 哈尔滨工业大学 一种低温冷却控制下的金属板材电磁成形装置及方法

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