EP0203866A1 - Matrize zum warmen Strangpressen - Google Patents

Matrize zum warmen Strangpressen Download PDF

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Publication number
EP0203866A1
EP0203866A1 EP86401116A EP86401116A EP0203866A1 EP 0203866 A1 EP0203866 A1 EP 0203866A1 EP 86401116 A EP86401116 A EP 86401116A EP 86401116 A EP86401116 A EP 86401116A EP 0203866 A1 EP0203866 A1 EP 0203866A1
Authority
EP
European Patent Office
Prior art keywords
core
hoop
support
die
cone
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
EP86401116A
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English (en)
French (fr)
Other versions
EP0203866B1 (de
Inventor
Jean Gavinet
Michel Lebouc
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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Application filed by Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP0203866A1 publication Critical patent/EP0203866A1/de
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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
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/02—Dies
    • 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
    • B21C25/025—Selection of materials therefor

Definitions

  • the subject of the present invention is a die which can be used in particular for hot spinning or hot coupling of profiles made of nickel, cobalt or titanium alloy. Such profiles can be used in particular in aircraft reactors.
  • Hot spinning processes are widely used processes for forming metals or alloys such as nickel or cobalt alloys.
  • the temperatures to be used are generally high, of the order of 1000 to 1350 ° C; it is therefore necessary to have dies having good mechanical characteristics at these temperatures; moreover, it is advantageous to be able to use the same die for several spinning operations while respecting the dimensions to be obtained with very small tolerances.
  • the dies used are generally constituted by a core hooped in a frame, the core being for example made of treated alloy steel.
  • Such dies may be suitable for obtaining products of round section, but in the case where it is desired to obtain profiles of complex shape made of refractory alloy, the alloy steel dies used until now do not allow power make several spinning in good conditions.
  • FIG. 1 there is shown in vertical section, a die according to the prior art.
  • This die is constituted by a core (1) hooped in a frame (3).
  • the core (1) partially defines, with the mount (3) the spinning input cone A, the core then delimits the working cone B then the cylindrical seat C and the mount finally delimits the outlet channel D of the Faculty.
  • the outer shape of the frame in the upper part corresponds to that of the wiring container used which, in the case of this figure, is conical.
  • Such systems are not capable of withstanding the high temperatures (of the order of 1150 to 1250 ° C.) and the high pressures, around 1300 MPa, necessary for shaping the alloys of nickel or cobalt refractory.
  • the core (1) is in abutment on the frame (3) and the shrinking stress is limited to the clamping effort of the container, but the spinning effort is opposed to the clamping effort. Therefore, the core hardly resists spinning.
  • the upper end (1a) of the core in the inlet cone of the die cools rapidly while the zone (1b) embedded in the frame constitutes a hot zone. As a result, there are ruptures in the die due to thermal shock.
  • French patent FR-A-2 497 126 is another type of die suitable in particular for spinning copper and aluminum alloys.
  • This die also includes an attached core embedded in a frame, but the frame is formed of two elements which are arranged relative to each other with a certain clearance.
  • such an arrangement does not allow to obtain the resistance at high pressures and it is not suitable for the spinning and co-spinning of nickel, cobalt or titanium alloys.
  • the present invention specifically relates to a spinning die which overcomes the drawbacks of the dies of the prior art, while allowing the production of profiles of nickel alloy, cobalt or titanium of complex shape.
  • said core is disposed in said hoop, so as to provide, between said hoop and the face of the core surrounded by said hoop, a slight clearance which is filled during the first spinning operation.
  • a frame made up of two parts capable of subjecting the core to an isostatic stress during the spinning operation, makes it possible to obtain the desired resistance to the conditions of elevated temperature and pressure works for this operation. Furthermore, the use of a frustoconical or cylindrical core makes it possible to prevent the rupture of the core under the action of thermal shock since the tip of the cone is eliminated, while keeping the continuity of the working angle.
  • the die of the invention can be used for spinning alloys which are difficult to spin, such as nickel, cobalt or titanium alloys, since the inlet of the die has the shape of a cone. Likewise, it can be used for high-temperature cofiling of billets and for hydrostatic spinning. For these applications, the die inlet cone preferably defines an angle much less than 180 °, for example from 60 to 90 ° C or even less than 60 °.
  • the sector of the invention has many advantages over the sectors of the prior art.
  • the core can be made of alloys sensitive to thermal shock, but resistant to friction at high temperature.
  • the core can also be made of ceramic materials with a very low coefficient of expansion, because the application of an isostatic stress during spinning makes the ceramic materials less fragile.
  • the use of such refractory materials is advantageous because it is thus possible to preheat the die at relatively high temperatures, for example 500-600 ° C., and to facilitate the spinning operation by avoiding thermal shock, at the start of spinning, between the billet and the tools.
  • alloys resistant to high temperatures which can be used for the production of the core, include superalloys based on cobalt or molybdenum.
  • the core can also be made of ceramic material.
  • the ceramics which can be used can be carbides or refractory oxides, for example carbides of silicon, chromium or tungsten. Refractory oxides are preferably used, such as stabilized or not stabilized zirconia. The use of such ceramic cores is interesting because they are not very subject to dimensional variations and do not require recalibration.
  • the hoop and the support are generally made of materials less fragile to thermal shock than the core, and having mechanical characteristics superior to those of the core but at lower temperatures.
  • materials which can be used mention may be made of treated alloy steels, molybdenum alloys, titanium alloys and refractory metals with a high melting point.
  • the hoop and the support are made of the same material, different materials can be used for the hoop and the support provided of course that they are compatible with each other and allow the core to be subjected to isostatic stress during the spinning.
  • the dies of the invention can be used for different spinning operations.
  • they are particularly suitable for the semi-hydrostatic spinning of nickel, cobalt or titanium, which is often necessary to have in a sheath during the spinning operation.
  • the nickel alloy billet is jacketed by a mild steel tube calibrated by stretching and a mild steel plug is welded to one side of the tube.
  • this plug which is arranged at the front of the billet makes it possible to attenuate the rapid cooling of the billet in contact with the tools.
  • the billets are heated so that their temperature is uniform and the container and the die are heated to a temperature of at least 350 ° C.
  • the spinning operation is then started using a feed speed of the gland of approximately 3 m / min, which makes it possible to obtain products having a suitable geometry over long lengths while reducing the wear of the dies, then the mild steel sheath is eliminated by pickling in a gain of nitric acid.
  • the use of the dies of the invention allows parts of very precise dimensions to be obtained in this process without causing wear on the die.
  • the die comprises a core (11) hooped by a frame comprising a first part or hoop (13) and a second part or support (14).
  • the support (14) and the hoop (13) are connected by a system of screws (15) making it possible to provide a clearance between them (16).
  • the assembly constituted by the core (11), the hoop (13) and the support (14) is mounted in the spinning press, partly in the container (17) and the external shape of the hoop (13) corresponds to that of the spinning container. Also, in the case of this example, its external surface is frustoconical like the lower part of the container (17).
  • the core (11) has the shape of a straight truncated cone, provided with an axial channel which delimits at least the working cone B and the cylindrical surface C of the die. It is surrounded on its frustoconical external surface and on its upper face which corresponds to the small - base of the truncated cone by the hoop (13) which delimits at least in part the entry cone A of the die whose angle d aperture a is less than 180 °.
  • a slight clearance (18) is provided during the assembly of the parts between the face of the core which corresponds to the small base of the truncated cone and the hoop - (13), and this clearance is such that it is filled during the first spinning operation, in order to subject the core to prestressing.
  • This clearance depends in particular on the expansion coefficients of the hoop and the core. Generally, clearances of 0.5 to 1 mm are sufficient.
  • the core (11) is in contact with the support (14) which is also pierced with a channel constituting the outlet D of the sector. This channel has the same profile as channel C of the die, but with a slightly larger opening.
  • This support (14) has an external shape such that it is partially embedded in the hoop (13) and that it can be assembled with the latter while providing clearance (16) which is such that, during the spinning operation, the support (14) always exerts pressure on the face of the core (11) which corresponds to the large base of the truncated cone.
  • the assembly system between the two parts consists of screws (19) which are screwed into the hoop (13), but can slide in the support - (14). Such an assembly makes it possible to obtain, during the spinning operation, an isostatic stress on the core (11).
  • the upper face of the core (11) is subjected to the spinning pressure
  • the outer frustoconical surface of the core is subjected to pressure forces generated by the container in the hoop (13)
  • the underside of the core is subjected to the pressure generated by the part (14)
  • the inner surface of the core (11) is subjected to the action of spinning forces. In this way, an isostatic stress is obtained on the core - (11), which leads to good mechanical characteristics.
  • the clearance (16) formed between the hoop - (13) and the support (14) depends, in particular, on the nature of the materials used for the production of the hoop, the support and the core.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Press Drives And Press Lines (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Extrusion Of Metal (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
EP86401116A 1985-05-31 1986-05-27 Matrize zum warmen Strangpressen Expired EP0203866B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8508225 1985-05-31
FR8508225A FR2582547B1 (fr) 1985-05-31 1985-05-31 Filiere pour filage a chaud

Publications (2)

Publication Number Publication Date
EP0203866A1 true EP0203866A1 (de) 1986-12-03
EP0203866B1 EP0203866B1 (de) 1989-12-20

Family

ID=9319742

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86401116A Expired EP0203866B1 (de) 1985-05-31 1986-05-27 Matrize zum warmen Strangpressen

Country Status (5)

Country Link
US (1) US4724699A (de)
EP (1) EP0203866B1 (de)
DE (1) DE3667617D1 (de)
ES (1) ES8704767A1 (de)
FR (1) FR2582547B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5957005A (en) * 1997-10-14 1999-09-28 General Electric Company Wire drawing die with non-cylindrical interface configuration for reducing stresses
DE10215056A1 (de) * 2002-04-05 2003-10-30 Sms Eumuco Gmbh Strang-und Rohrpresse
CN100386466C (zh) * 2006-03-22 2008-05-07 西安建筑科技大学 连续变断面循环挤压制备细晶材料的方法及装置
CN102825084B (zh) * 2011-12-09 2015-07-15 洛阳轴研科技股份有限公司 一种冷挤压装置及冷挤压装置的凹模、凸模

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1413597A (fr) * 1963-11-14 1965-10-08 Zirconium Corp Of America Composition de zircon-magnésie, son procédé de fabrication et ses applications
FR1487972A (fr) * 1966-07-28 1967-07-07 Mannesmann Ag Matrice pour le filage des métaux lourds à chaud
FR1572342A (de) * 1967-07-14 1969-06-27
FR2080429A5 (de) * 1970-02-02 1971-11-12 Plansee Metallwerk
US3680354A (en) * 1970-03-23 1972-08-01 Allegheny Ludlum Steel Die assembly
SU664706A1 (ru) * 1977-07-05 1979-05-30 Физико-технический институт АН Белорусской ССР Матричный узел дл эксрудировани
FR2497126A1 (fr) * 1980-12-30 1982-07-02 Vasipari Kutato Intezet Outil de presse avec element rapporte en materiau dur pour le formage de metaux, notamment d'alliages de cuivre et d'aluminium

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB370181A (en) * 1931-03-31 1932-04-07 James Robert Garner Improvements in or relating to dies for use in the cupping or push bench process of making metal tubes
GB549407A (en) * 1941-08-26 1942-11-19 Frederick Charles Jearum Improvements in the setting of diamond or sintered or fused carbide or like hard dies
GB565080A (en) * 1943-04-21 1944-10-25 A C Wickman Ltd Improvements relating to holders for dies used in wire drawing, extrusion and like processes
GB1160355A (en) * 1967-01-26 1969-08-06 Kabel Metallwerke Ghh An Extrusion Die Assembly.
US4241625A (en) * 1979-03-08 1980-12-30 Fort Wayne Wire Die, Inc. Method of making a wire drawing die
US4270380A (en) * 1979-05-25 1981-06-02 Corning Glass Works Metal shaping die assembly

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1413597A (fr) * 1963-11-14 1965-10-08 Zirconium Corp Of America Composition de zircon-magnésie, son procédé de fabrication et ses applications
FR1487972A (fr) * 1966-07-28 1967-07-07 Mannesmann Ag Matrice pour le filage des métaux lourds à chaud
FR1572342A (de) * 1967-07-14 1969-06-27
FR2080429A5 (de) * 1970-02-02 1971-11-12 Plansee Metallwerk
US3680354A (en) * 1970-03-23 1972-08-01 Allegheny Ludlum Steel Die assembly
SU664706A1 (ru) * 1977-07-05 1979-05-30 Физико-технический институт АН Белорусской ССР Матричный узел дл эксрудировани
FR2497126A1 (fr) * 1980-12-30 1982-07-02 Vasipari Kutato Intezet Outil de presse avec element rapporte en materiau dur pour le formage de metaux, notamment d'alliages de cuivre et d'aluminium

Also Published As

Publication number Publication date
US4724699A (en) 1988-02-16
EP0203866B1 (de) 1989-12-20
ES8704767A1 (es) 1987-04-16
DE3667617D1 (de) 1990-01-25
FR2582547A1 (fr) 1986-12-05
ES555556A0 (es) 1987-04-16
FR2582547B1 (fr) 1988-12-02

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