EP3241625A1 - Dispositif et procede de transformation plastique d'une piece usinee metallique ou en alliage metallique au moyen d'ecap - Google Patents

Dispositif et procede de transformation plastique d'une piece usinee metallique ou en alliage metallique au moyen d'ecap Download PDF

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Publication number
EP3241625A1
EP3241625A1 EP16168592.0A EP16168592A EP3241625A1 EP 3241625 A1 EP3241625 A1 EP 3241625A1 EP 16168592 A EP16168592 A EP 16168592A EP 3241625 A1 EP3241625 A1 EP 3241625A1
Authority
EP
European Patent Office
Prior art keywords
workpiece
channel
channels
metal
ecap
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
EP16168592.0A
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German (de)
English (en)
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EP3241625B1 (fr
Inventor
Maciej Krystian
Bernhard Mingler
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.)
AIT Austrian Institute of Technology GmbH
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AIT Austrian Institute of Technology 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 AIT Austrian Institute of Technology GmbH filed Critical AIT Austrian Institute of Technology GmbH
Priority to EP16168592.0A priority Critical patent/EP3241625B1/fr
Priority to PCT/EP2017/060655 priority patent/WO2017191256A1/fr
Priority to US16/094,678 priority patent/US20190126333A1/en
Publication of EP3241625A1 publication Critical patent/EP3241625A1/fr
Application granted granted Critical
Publication of EP3241625B1 publication Critical patent/EP3241625B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/001—Extruding metal; Impact extrusion to improve the material properties, e.g. lateral extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/005—Continuous extrusion starting from solid state material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/02—Dies

Definitions

  • the invention relates to a device for plastic deformation of a workpiece made of metal or a metal alloy by means of ECAP, comprising more than two channels.
  • the invention relates to a method for plastic deformation of a workpiece made of metal or a metal alloy by means of ECAP, wherein the workpiece is pressed one or more times by a device having more than two channels.
  • ECAP equal channel angular pressing
  • Certain magnesium alloys are used, for example, to form bioresorbable stents or osteosynthesis components.
  • a magnesium alloy must meet several requirements in order to be used as a material for such medical implants can.
  • such an alloy In addition to a high biocompatibility and a low or an application adapted decomposition rate, such an alloy must also have very good mechanical properties, such as a high strength.
  • Known ECAP devices are suitable for forming a magnesium alloy workpiece for such applications, however, even better mechanical properties are desired.
  • ECAP devices and methods for plastically forming a workpiece from a metal or a metal alloy are examples of the article Principles of equal-channel angular pressing as a processing tool for grain refinement (RZ Valiev, TG Langedon, Progr. Mat. Sci. 51 (2006) 881 ) known.
  • the RU 2 181 314 C2 discloses a device for plastic deformation of a workpiece made of metal.
  • the device comprises three channels for producing a high-strength workpiece, wherein an input channel and an output channel are arranged parallel to one another.
  • an input channel and an output channel are arranged parallel to one another.
  • the object of the invention is to provide a device of the type mentioned, with which in particular a workpiece made of a magnesium alloy is effectively and efficiently deformable.
  • an input channel and an output channel are provided, which connect indirectly to each other and are arranged approximately perpendicular to each other.
  • An advantage achieved by the invention is to be seen in particular in that a workpiece made of metal or a metal alloy, in particular of a magnesium alloy, can be produced with greatly improved mechanical properties by the device.
  • a workpiece made of metal or a metal alloy, in particular of a magnesium alloy can be produced with greatly improved mechanical properties by the device.
  • a workpiece with a high strength can be produced, wherein this is preferably pressed several times through the device.
  • a forming of the workpiece thus comprises a repeated pressing of the workpiece through the device.
  • a workpiece with higher strength can be generated, which after further processing z. B. is used as a medical implant.
  • a number of pressing operations is reduced by the device for generating a predetermined strength.
  • a maximum achievable strength of the workpiece is higher than by plastic forming with a known from the prior art ECAP device.
  • At least one further channel is provided, wherein the input channel and the output channel are connected to one another by the at least one further channel.
  • the device is thus designed for a double forming per pressing process.
  • the workpiece is preferably pressed several times through the device for forming it. It can also be arranged a plurality of channels between the input channel and the output channel. It is always provided that the input channel is aligned approximately perpendicular to the output channel.
  • Angle of successive Umformknicken can be the same or different sizes.
  • an angle of a Umformknickes between the input channel and a subsequent to this further channel about 75 ° to 135 °, in particular about 90 ° to 120 °, more preferably about 90 °, amount.
  • An angle of Umformknickes between the other channel and the adjoining output channel may correspond to the angle of the Umformknickes between the input channel and the adjoining this further channel or have a different-sized angle. This may for example be about 105 ° to 135 °, in particular about 115 ° to 125 °, particularly preferably about 120 °.
  • a heating device is provided.
  • the heating device is designed to heat the device and thus the workpiece to a predetermined temperature, wherein this is arranged on the device.
  • a temperature at each press-fitting of a workpiece in particular a magnesium alloy, can be lowered by the device.
  • the temperature at a first press-through of the workpiece to about 270 ° C to 380 ° C, in particular to about 300 ° C to 350 ° C, adjustable, whereas in a last pressing to about 190 ° C to 270 ° C, especially 220 ° C up to 240 ° C, is adjustable.
  • the heating device lowers the temperature until the last pressing down to room temperature.
  • a device according to the invention requires a lower temperature than known devices, as a result of which a workpiece can be plastically deformed more effectively.
  • the workpiece is plastically deformed by one or more pressing through an input channel and an indirectly adjacent to the input channel and arranged approximately perpendicular to this output channel.
  • An advantage achieved thereby is to be seen in particular in that thereby a workpiece with high strength is produced.
  • a tendency for cracking of the workpiece is inhibited by the pressing through multiple channels.
  • the workpiece is plastically deformed by means of ECAP or equal channel angular pressing. Between the input channel and the output channel one or more further channels are arranged, wherein between each two channels a Umformknick is formed. As a result, the workpiece is formed at least twice each time it is pressed through.
  • the output channel is always arranged approximately perpendicular to the input channel.
  • the workpiece is rotated about a longitudinal axis thereof before each introduction into the input channel.
  • the workpiece is thereby formed into a uniformly solid and with a uniform grain fineness equipped workpiece.
  • an achievable strength thereof is increased.
  • the workpiece is deformed at least twice each time it is pressed through the device.
  • the workpiece is pressed by at least three channels, wherein the input channel and the output channel are always arranged perpendicular to each other.
  • the workpiece is pressed through three channels.
  • a Umformknick is provided between each two channels.
  • the deformation kinks can have the same or different angles.
  • two Umformknicke be provided between three channels, wherein a first Umformknick an angle of about 75 ° to 135 °, in particular about 90 ° to 120 °, more preferably about 90 °, and a second Umformknick an equal angle or for example an angle from about 105 ° to 135 °, in particular about 115 ° to 125 °, particularly preferably about 120 °.
  • an angle of a deformation kink between two consecutive channels can each be the same or different.
  • the temperature can also be reduced to room temperature until the last squeeze. Between a first and a last squeezing of the workpiece by the device, this is pressed as often as desired by the same, wherein a temperature of the heater decreases in the pressing direction.
  • Fig. 1 shows an inventive device 1 for plastic deformation of a workpiece made of metal or a metal alloy by means of ECAP.
  • the device 1 comprises an input channel 2 and an output channel 3, wherein the input channel 2 and the output channel 3 are connected via a further channel 4.
  • the input channel 2 and the output channel 3 and their longitudinal axes are arranged approximately perpendicular to each other.
  • a Umformknick is provided between the input channel 2 and the further channel 4 at an angle ⁇ of about 90 °.
  • another Umformknick is formed between the further channel 4 and the output channel 3, said Umformknick an angle ⁇ of about 120 °.
  • the device 1 is thus designed as a double-ECAP device.
  • FIGS. 2 and 3 experimental results of a tensile test and a compression test are shown.
  • data A of a workpiece in an initial state data B of a workpiece formed with a known ECAP device and data C with the workpiece 1 according to the invention are compared with each other.
  • the workpiece is made of a magnesium alloy and is pressed several times for the data B and data C by a known or inventive device 1.
  • Both the tensile test according to Fig. 2 as well as the pressure test according to Fig. 3 show that the workpiece produced with the device 1 according to the invention has a significantly higher strength.
  • the workpiece is heated both during pressing by the known device as well as by the device 1 according to the invention, wherein a temperature between a first pressing of the workpiece until a last squeezing of the same from 350 ° C to 290 ° C is lowered.
  • Corresponding data A, B and C are in 4 and 5 shown, wherein in turn a workpiece made of a magnesium alloy is reshaped or measured.
  • magnesium alloy differs in composition from magnesium alloy according to FIGS. 2 and 3 .
  • the workpiece plastically deformed with the device 1 according to the invention has a significantly higher strength than a workpiece produced with an ECAP device with two channels.
  • a temperature is lowered from 300 ° C. to 220 ° C., the workpiece being pressed again several times through a known or inventive device 1.
  • the data A in turn come from the untreated workpiece.
  • Fig. 6 shows experimental results of a workpiece 1 made of a magnesium alloy produced with a device 1 according to the invention. There are very high strengths realized. A tensile strength of the workpiece is about 468 MPa and a yield strength thereof at about 413 MPa.
  • a workpiece made of a metal or a metal alloy can be produced efficiently, which has high strength, sufficient ductility, high hardness, uniform grain fineness and little tendency to crack formation.
  • Such a workpiece is therefore suitable, for example, for producing a stent or other medical implants.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
EP16168592.0A 2016-05-06 2016-05-06 Dispositif et procede de transformation plastique d'une piece usinee metallique ou en alliage metallique au moyen d'ecap Active EP3241625B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP16168592.0A EP3241625B1 (fr) 2016-05-06 2016-05-06 Dispositif et procede de transformation plastique d'une piece usinee metallique ou en alliage metallique au moyen d'ecap
PCT/EP2017/060655 WO2017191256A1 (fr) 2016-05-06 2017-05-04 Procédé et dispositif de déformation plastique d'une pièce composée de métal ou d'un alliage métallique par extrusion angulaire à section constante (ecap)
US16/094,678 US20190126333A1 (en) 2016-05-06 2017-05-04 Device and method for the plastic forming of a workpiece made of metal or a metal alloy by means of ecap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16168592.0A EP3241625B1 (fr) 2016-05-06 2016-05-06 Dispositif et procede de transformation plastique d'une piece usinee metallique ou en alliage metallique au moyen d'ecap

Publications (2)

Publication Number Publication Date
EP3241625A1 true EP3241625A1 (fr) 2017-11-08
EP3241625B1 EP3241625B1 (fr) 2020-07-01

Family

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Application Number Title Priority Date Filing Date
EP16168592.0A Active EP3241625B1 (fr) 2016-05-06 2016-05-06 Dispositif et procede de transformation plastique d'une piece usinee metallique ou en alliage metallique au moyen d'ecap

Country Status (3)

Country Link
US (1) US20190126333A1 (fr)
EP (1) EP3241625B1 (fr)
WO (1) WO2017191256A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11971584B2 (en) 2019-01-30 2024-04-30 Us Conec Ltd. Small form factor connector and adapter
CN114309112B (zh) * 2021-12-30 2024-03-19 福州大学 一种新型Bc等径角挤压模具

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2181314C2 (ru) 2000-06-09 2002-04-20 Уфимский государственный авиационный технический университет Устройство для обработки металлов давлением
WO2005039792A1 (fr) * 2003-10-08 2005-05-06 University Of Strathclyde Procede de traitement d'une billette metallique
EP1972391A1 (fr) * 2005-10-31 2008-09-24 JTEKT Corporation Moule composite, dispositif de mise en forme des plastiques et procede de mise en forme des plastiques
WO2012071600A1 (fr) * 2010-11-29 2012-06-07 Ait Austrian Institute Of Technology Gmbh Procédé de production d'un objet en métal ou en alliage par déformation plastique sévère, objet ainsi produit et outil de moulage par compression correspondant
WO2016145368A1 (fr) * 2015-03-11 2016-09-15 Boston Scientific Scimed, Inc. Microstructures en alliage de magnésium bioérodable pour endoprothèses

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2181314C2 (ru) 2000-06-09 2002-04-20 Уфимский государственный авиационный технический университет Устройство для обработки металлов давлением
WO2005039792A1 (fr) * 2003-10-08 2005-05-06 University Of Strathclyde Procede de traitement d'une billette metallique
EP1972391A1 (fr) * 2005-10-31 2008-09-24 JTEKT Corporation Moule composite, dispositif de mise en forme des plastiques et procede de mise en forme des plastiques
WO2012071600A1 (fr) * 2010-11-29 2012-06-07 Ait Austrian Institute Of Technology Gmbh Procédé de production d'un objet en métal ou en alliage par déformation plastique sévère, objet ainsi produit et outil de moulage par compression correspondant
WO2016145368A1 (fr) * 2015-03-11 2016-09-15 Boston Scientific Scimed, Inc. Microstructures en alliage de magnésium bioérodable pour endoprothèses

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
R. Z. VALIEV; T. G. LANGEDON, PROGR. MAT. SCI., vol. 51, 2006, pages 881

Also Published As

Publication number Publication date
EP3241625B1 (fr) 2020-07-01
US20190126333A1 (en) 2019-05-02
WO2017191256A1 (fr) 2017-11-09

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