EP0684881B1 - Verfahren und vorrichtung zur aufbringung eines temperaturprofils an für das strangpressen vorgesehenen metallblöcken - Google Patents

Verfahren und vorrichtung zur aufbringung eines temperaturprofils an für das strangpressen vorgesehenen metallblöcken Download PDF

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Publication number
EP0684881B1
EP0684881B1 EP94906877A EP94906877A EP0684881B1 EP 0684881 B1 EP0684881 B1 EP 0684881B1 EP 94906877 A EP94906877 A EP 94906877A EP 94906877 A EP94906877 A EP 94906877A EP 0684881 B1 EP0684881 B1 EP 0684881B1
Authority
EP
European Patent Office
Prior art keywords
block
extrusion
temperature
metal
chilling chamber
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.)
Expired - Lifetime
Application number
EP94906877A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0684881A1 (de
Inventor
Amit Kumar Biswas
Alfred Steinmetz
Ivar Venaas
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.)
SMS Hasenclever GmbH
SMS Hasenclever Maschinenfabrik GmbH
Hydro Aluminium AS
Original Assignee
SMS Hasenclever GmbH
SMS Hasenclever Maschinenfabrik GmbH
Hydro Aluminium AS
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 SMS Hasenclever GmbH, SMS Hasenclever Maschinenfabrik GmbH, Hydro Aluminium AS filed Critical SMS Hasenclever GmbH
Publication of EP0684881A1 publication Critical patent/EP0684881A1/de
Application granted granted Critical
Publication of EP0684881B1 publication Critical patent/EP0684881B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work

Definitions

  • the blocks heated to the pressing temperature are pressed out of a pick-up through a die, the blocks for insertion having to have a slightly smaller outside diameter compared to the inside diameter of the pick-up.
  • the block is first compressed so that it fills the inside diameter of the transducer, it is pressed into the strand by the die.
  • the heat released from the forming work flows to the remaining block, the die with the die holder and the sensor.
  • direct pressing depending on the prevailing tribological conditions, the block slides or shears along the transducer wall, which generates heat in the area of the block near the surface, and part of this heat also remains in the block under compression.
  • an isothermal pressing process is aimed at by varying the pressing speed over the block length or by applying an axial temperature gradient to the block before the pressing process begins, the end on the die side being warmer than the end on the die side.
  • inductive shock heaters are used, as are known from DE-B 1 014 678, in which the block is first heated to a uniform lower temperature in a first furnace or furnace part and then subsequently in a second furnace or part of the furnace is partially further inductively heated so that it has a higher end Temperature.
  • a better reproducible temperature gradient can be generated by using an induction heating system which is provided with a plurality, usually four or more induction coils, which can be regulated and controlled separately.
  • the system is expensive due to its complicated structure and means a considerable additional investment on the part of the operator of the extrusion system.
  • the invention relates to a device by means of which a pending block, heated to a pressing temperature suitable for the metal and stored with this block, experiences a temperature influence by quenching in coordination with the timing of the pressing cycle.
  • a quenching of the heated block at its end facing away from the pressing of the die and the application of a temperature gradient from one end of the block to the other takes place according to FR-PS 1 049 675 by spraying the end of the block with or by immersing the end of the block in a cooling liquid, thus the compression of the block before the extrusion to the strand initially affects the hotter end facing the die and so the progressive upsetting of the block displaces the air out of the transducer from the die side to the rear, thus avoiding air pockets.
  • the temperature gradient resulting from the quenching of one end of the block accommodates an insothermal pressing, but does not produce a sufficiently coordinated and reproducible temperature gradient on the block to be pressed.
  • US Pat. No. 5,027,643 provides that a temperature gradient is reproducibly provided on blocks heated above the temperature intended for pressing the metal by controlled cooling which varies over the block length , for which purpose the block emerging from the furnace is introduced on its way to the extrusion press into a cooling device which is provided in a plurality of ring zones arranged axially one behind the other with nozzles for spraying the block with a coolant, and the cooling intensity in the ring zones and the relative movement of a block is adjustable in relation to the ring zones.
  • the amount of coolant can only be influenced to a limited extent, because otherwise temperature differences occur around the block circumference.
  • the invention is based on the cooling device forming the preamble of claim 1 according to US Pat. No. 5,027,643.
  • the quenching chamber of the cooling device is arranged with a vertical axis.
  • a structurally advantageous embodiment of the system is obtained if the quenching chamber with a vertical axis is arranged above a means of transport for the blocks consisting of two block dumpers that meet in the vertical axis of the quenching chamber, and with it a ram moving the block relative to the quenching chamber can be raised and lowered is arranged.
  • the drive effecting the lifting movement of the plunger and thus the lifting and lowering speed of the plunger can advantageously be regulated.
  • extruder 1 consists of an extruder 1, an oven 2, a warming chamber 3, a first block tipper 4, a quenching chamber 5, a second block tipper 6, a walking beam conveyor 7, a block loader 8 and the extruder 1 arranged downstream of an outlet 9 with the usual follow-up devices for the further treatment of the extruded strands.
  • the induction furnace 2 which is provided with a coil 12 in a horizontal arrangement, is provided for receiving a plurality of blocks 10a.
  • the blocks 10 are advanced in the furnace 2 by a plunger, not shown.
  • Downstream of the furnace 2 is a warming chamber 3, in which the next block 10b intended for compression, which has been heated in the furnace 2 to a temperature suitable for its compression, is stored.
  • the warming chamber 3 is provided with a coil 13 in order to be able to keep the temperature of the block 10b during the dwell time in the warming chamber 3, the dwell time being otherwise used to compensate for the temperature of the block 10b.
  • block 10b is ejected from the warming chamber and reaches block tipper 4, from which the block is tilted into a vertical position below and coaxially with quenching chamber 5.
  • a plunger 11 is arranged coaxially with the block and the quenching chamber 5.
  • the tappet 11 designed as a toothed rack is guided in a housing 14.
  • a pinion 15 driven by a speed-controllable motor 16 the plunger 11 is movable in a vertical direction into an upper position in which the block is lifted from the block tipper 4 and raised to a position above the quenching chamber 5, where it is held by a basket 17 becomes.
  • each nozzle rings 18 are provided in the quenching chamber 5 one above the other - in the exemplary embodiment, which form cooling zones, for which purpose the nozzle rings 18 are supplied separately with coolant, so that the quantity of coolant, the coolant pressure, the coolant temperature and the cooling time in each nozzle ring 18, that is to say in each Cooling zone are adjustable for themselves.
  • Strips 19 which extend through the cooling chamber 5 and the basket 17 serve to guide a block while it is moving in the cooling chamber 5 and in the basket 17, respectively. Evaporating coolant is sucked out by a fan 20 from a housing 21 encasing the cooling chamber 5 and the basket 17.
  • the cooling is regulated in such a way that a temperature distribution is present in the block when it leaves the cooling chamber 5, as can be seen from the diagram in FIG.
  • the upper end of the block remained unaffected by the coolant, while the lower end of the block was exposed to the amount, pressure and temperature of the coolant controlled over the entire lowering time of 20 seconds. This temperature distribution is set so that the block can be pressed isothermally at an optimal pressing speed.
  • the block tipper 4 As soon as a block 10b brought by block tipper 4 under the cooling chamber 5 has been lifted from the plunger 11 into the area of the cooling chamber 5 and the basket 17, the block tipper 4 in pivoted back to its starting position, where it is ready to receive another block 10b.
  • the block tipper 6 is pivoted under the cooling chamber 5, before the block located in the cooling chamber 5 is lowered again by the plunger 11, so that the block tipper 6 can take over the block emerging from the cooling chamber 5.
  • the block tipper 6 deposits the block on a walking beam conveyor 7, which feeds the block to the block loader 7, which then loads the block into the extruder 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Forging (AREA)
EP94906877A 1993-02-18 1994-02-17 Verfahren und vorrichtung zur aufbringung eines temperaturprofils an für das strangpressen vorgesehenen metallblöcken Expired - Lifetime EP0684881B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4305012 1993-02-18
DE4305012 1993-02-18
PCT/DE1994/000166 WO1994019124A1 (de) 1993-02-18 1994-02-17 Verfahren und vorrichtung zur aufbringung eines temperaturprofils an für das strangpressen vorgesehenen metallblöcken

Publications (2)

Publication Number Publication Date
EP0684881A1 EP0684881A1 (de) 1995-12-06
EP0684881B1 true EP0684881B1 (de) 1996-12-11

Family

ID=6480799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94906877A Expired - Lifetime EP0684881B1 (de) 1993-02-18 1994-02-17 Verfahren und vorrichtung zur aufbringung eines temperaturprofils an für das strangpressen vorgesehenen metallblöcken

Country Status (7)

Country Link
US (1) US5802905A (no)
EP (1) EP0684881B1 (no)
JP (1) JPH08509660A (no)
AT (1) ATE146105T1 (no)
DE (2) DE4405027A1 (no)
NO (1) NO953078D0 (no)
WO (1) WO1994019124A1 (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19946998B4 (de) * 1999-09-30 2005-10-13 Kramer, Carl, Prof. Dr.-Ing. Vorrichtung zur Abkühlung eines metallischen Pressbolzens oder Stangenabschnitts

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0839589A1 (de) * 1996-11-04 1998-05-06 Alusuisse Technology & Management AG Verfahren zur Herstellung eines Metallprofilstranges
KR100319651B1 (ko) * 1997-09-24 2002-03-08 마스다 노부유키 고주파유도가열을이용하는자동판굽힘가공장치
ES2213042T3 (es) * 1999-09-10 2004-08-16 Kramer, Carl, Prof.Dr.-Ing. Procedimiento de tratamiento termico de lingotes metalicos.
ITBS20040009A1 (it) * 2004-01-22 2004-04-22 Cometal Engineering S P A Impianto per la produzione di profili estrusi in alluminio
CN101468365B (zh) * 2007-12-29 2011-03-30 富准精密工业(深圳)有限公司 导风装置和采用该导风装置的工件冷却装置
CN102500635B (zh) * 2011-10-11 2014-11-05 福建工程学院 镁合金加热成形工艺及镁合金加热送料通道
KR20150097797A (ko) 2012-12-21 2015-08-26 엑스코 테크놀로지스 리미티드 압출 프레스 컨테이너 및 이를 위한 맨틀
DE102019203157B4 (de) * 2019-01-08 2020-07-23 Sms Group Gmbh Schale als Transportschuh für induktiv zu erwärmende Stahlblöcke, Verfahren zur induktiven Erwärmung von Stahlblöcken unter Verwendung einer solchen Schale sowie Einrichtung zur Durchführung des Verfahrens

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FR1049675A (fr) * 1951-01-26 1953-12-31 Schloemann Ag Procédé de traitement de matière de pressage utilisée en une ou plusieurs parties pour la fabrication de tubes ou de barres de longueur quelconque dans des presses à profiler les tubes et les barres métalliques, en particulier dans les presses à enrober les câbles en aluminium
DE1014678B (de) * 1955-06-07 1957-08-29 Bbc Brown Boveri & Cie Durchlaufinduktionsofen zur in Richtung der Laengsachse ungleichmaessigen Erwaermungvon Metallbloecken
US3173283A (en) * 1960-12-27 1965-03-16 Vogtmann Hans Process and apparatus for loading extrusion presses
US4393917A (en) * 1977-06-27 1983-07-19 Western Electric Company, Inc. Methods and apparatus for casting and extruding material
US4245818A (en) * 1978-03-16 1981-01-20 Prolizenz Aktiengesellschaft Apparatus for heat treatment of material to be worked on, especially of aluminum or magnesium alloys
JPS5767134A (en) * 1980-10-09 1982-04-23 Nippon Steel Corp Method and installation for continuous annealing method of cold-rolled steel strip
JPS57159214A (en) * 1981-03-25 1982-10-01 Sumitomo Metal Ind Ltd Manufacture of pipe by hot extrusion
SE437675B (sv) * 1981-05-14 1985-03-11 Asea Ab Kylanordning for avlanga kroppar
US4666665A (en) * 1986-01-30 1987-05-19 Federal-Mogul Corporation Hot-forging small inner diameter powdered metal parts
US4758398A (en) * 1986-10-07 1988-07-19 The Dexter Corporation Method of manufacture preforms
US5027634A (en) * 1990-02-28 1991-07-02 Granco-Clark, Inc. Solutionizing taper quench
DE4024605A1 (de) * 1990-08-02 1992-02-06 Wsp Ingenieurgesellschaft Fuer Vorrichtung zur abkuehlung von strangpressprofilen
US5359874A (en) * 1991-11-12 1994-11-01 Abb Power T & D Company, Inc. Method and apparatus for production of continuous metal strip
US5197319A (en) * 1991-12-05 1993-03-30 Brazeway, Inc. Extrusion apparatus for sheathing a temperature sensitive core material
EP0575646A1 (en) * 1992-06-22 1993-12-29 Aliteco Ag A method and a device for forming various workpieces
US5306365A (en) * 1992-11-19 1994-04-26 Aluminum Company Of America Apparatus and method for tapered heating of metal billet
US5325694A (en) * 1993-03-15 1994-07-05 Granco Clark, Inc. Extrusion billet taper quenching system
JPH06277749A (ja) * 1993-03-26 1994-10-04 Sumitomo Metal Ind Ltd 熱間押出設備
EP0672473A1 (en) * 1994-03-15 1995-09-20 Norsk Hydro A/S Apparatus and process for the extrusion of profiles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19946998B4 (de) * 1999-09-30 2005-10-13 Kramer, Carl, Prof. Dr.-Ing. Vorrichtung zur Abkühlung eines metallischen Pressbolzens oder Stangenabschnitts

Also Published As

Publication number Publication date
DE59401270D1 (de) 1997-01-23
EP0684881A1 (de) 1995-12-06
US5802905A (en) 1998-09-08
ATE146105T1 (de) 1996-12-15
DE4405027A1 (de) 1994-11-10
WO1994019124A1 (de) 1994-09-01
NO953078L (no) 1995-08-07
NO953078D0 (no) 1995-08-07
JPH08509660A (ja) 1996-10-15

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