WO2005035157A1 - Procede de façonnage thermoregule de materiau et dispositif pour realiser ce procede - Google Patents

Procede de façonnage thermoregule de materiau et dispositif pour realiser ce procede Download PDF

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Publication number
WO2005035157A1
WO2005035157A1 PCT/EP2004/010975 EP2004010975W WO2005035157A1 WO 2005035157 A1 WO2005035157 A1 WO 2005035157A1 EP 2004010975 W EP2004010975 W EP 2004010975W WO 2005035157 A1 WO2005035157 A1 WO 2005035157A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
forming
processing device
influencing
controlled
Prior art date
Application number
PCT/EP2004/010975
Other languages
German (de)
English (en)
Inventor
Ronald Stiem
Edgar Altmann
Original Assignee
Alcan Technology & Management Ltd.
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 Alcan Technology & Management Ltd. filed Critical Alcan Technology & Management Ltd.
Publication of WO2005035157A1 publication Critical patent/WO2005035157A1/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
    • B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
    • 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
    • B21C31/00—Control devices, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
    • 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
    • B21C33/00—Feeding extrusion presses with metal to be extruded ; Loading the dummy block
    • B21C33/006—Consecutive billets, e.g. billet profiles allowing air expulsion or bonding of billets

Definitions

  • the invention relates to a method for temperature-controlled material forming, in particular for temperature-controlled extrusion, in which, based on the temperature of the formed material, a readjustment of process parameters takes place, such as, in particular, the inlet temperature of the material to be processed and / or the forming speed ,
  • the invention further relates to a temperature-controlled material processing device with at least one heating device, at least one forming device and at least one influencing device which, based on the measured value of a temperature measuring device arranged immediately after a forming device, influences at least one heating device and / or at least one forming device.
  • the invention relates to the use of a method for temperature-controlled material forming, in particular a temperature-controlled material forming method of the type mentioned above, and the use of a temperature-controlled material processing device, in particular a temperature-controlled material processing device of the type mentioned above.
  • the plastic deformability of the material to be supplied and thus the possible speed of the forming process depends on the material composition of the material to be formed as well as the pressure exerted, mainly on the process temperature.
  • the highest possible temperature of the material to be formed is chosen.
  • the temperature cannot be increased arbitrarily.
  • the maximum permissible ge temperature particularly limited by the melting temperature of the material to be formed.
  • a further limitation of the permissible temperature results from the condition that the formed material must not deform automatically, that is to say in particular it must not deform under its own weight.
  • the material to be formed can cool down, for example, by contact with the forming device, and on the other hand, a temperature increase can occur due to the forming process.
  • a temperature increase can occur due to the forming process.
  • the latter applies, for example, to extrusion processes in which a not inconsiderable increase in temperature can occur due to the deformation of the material during extrusion through the extrusion matrix.
  • the temperature also has a significant influence on the material properties of the deformed material produced, and thus ultimately on the product quality, for example with regard to the homogeneity, the remaining internal mechanical stresses etc. of the products.
  • controlled variable the production and maintenance of the temperature 95, referred to as the controlled variable, of the formed material is achieved by means of a closed control circuit which, by permanent comparison of the setpoint and actual value of the controlled variable, calculates the forming speed necessary for correction as a manipulated variable.
  • a material to be pressed of any cross-section (usually in the form of a cylindrical block) is pressed by means of a hydraulic ram under high pressure through an opening provided with a die, the feed rate of the hydraulic ram represents the manipulated variable.
  • control systems only use a single control variable, namely usually the temperature of the formed material.
  • a cooling step for the formed piece of material should be mentioned in particular.
  • Such a cooling step is usually carried out in the form of rapid cooling, a so-called "quenching".
  • the inventor has made it his task to propose a device which is particularly suitable for carrying out the method. After all, the inventor
  • process parameters are readjusted, such as, in particular, developing the input temperature of the material to be processed and / or the forming speed so that the readjustment of the process parameters
  • 165 eter is influenced by at least one additional measured value.
  • an improved adaptation of the process parameters can also be carried out with regard to further processing steps before or after the forming step.
  • the nitrogen cooling is preferably switched on only during the material forming, since it otherwise the tool could cool down too much.
  • At least one additional measured value is a temperature measured value, in particular a contactlessly determined temperature measured value. Because in particular
  • the process temperatures make a significant contribution to the achievable forming speed or to the quality and quality of the manufactured workpieces, it is particularly useful to take one or more temperature measurements into account.
  • Quenching is a particularly rapid cooling step, for example a rapid cooling with
  • the programmable controller can in particular can also be provided with a storage device, in particular a storage device in which the storage content is retained even after the power supply has been interrupted
  • 235 used device can be achieved so that, for example, less waste is produced.
  • At least one material section is completely formed and then, based on the measurement values obtained, later material sections are adapted. For example, when the proposed method is applied to an extrusion process, a press
  • the deviation of the measured temperature profiles (actual profile) from a target profile can be determined using a mathematical model. From these, a correction data record can again be used for activation
  • the material section is to be understood as the blocks of pressed material used or the areas of the extrusion path extruded from these blocks of pressed material.
  • it could be, for example, a blank to be bent.
  • the number of material sections can be arbitrary. It is also conceivable that the selected number is based on existing cycles. For example, it could be that a furnace loading for heating the blocks of pressed material from the above-mentioned
  • a first warm-up step can be constant, i.e. without readjustment.
  • a second warm-up step then takes into account the required change in the heating of the blocks of pressed material. If, for example, a gas oven is used for the first warm-up step and an induction oven is used for the second warm-up step, it can be advantageous for an induction oven.
  • Process parameters are only changed on the induction furnace, since this is easier to control than the gas furnace. Furthermore, it can be advantageous if certain areas of the material, in particular the formed material, are added
  • extruded material web can optionally also be made more homogeneous, for example because
  • the 320 se can be compensated for heat losses due to the increase in temperature caused by the pressure increase.
  • the initial deformation of the freshly inserted piece of material can be carried out more quickly due to the increased pressure. Since in particular
  • 325 press process introduces a not inconsiderable temperature component into the workpiece due to the material deformation during the forming process, a freshly inserted piece of material is usually relatively cold at first and requires a correspondingly increased forming pressure.
  • the forming pressure used for non-readjusted material forming is in a range from 80 to 95 percent, preferably in a range from 85 to 90 percent, of the maximum pressure of the material forming device.
  • a temperature-controlled material processing device with at least one heating device, at least one shaping device and at least one influencing device based on
  • 385 alloys have a relatively low melting point, so it is important to limit the temperatures that occur. In addition, fluctuations in temperature often have a particularly disadvantageous effect on the quality and quality of aluminum or aluminum products
  • thermocontroller in particular a temperature-controlled material processing device of the above
  • FIG. 1 the schematic structure of an extrusion arrangement according to an embodiment of the proposed invention.
  • FIG. 1 A diagram of an extrusion system 10 which uses the present invention is outlined in FIG. 1.
  • material flows are shown with a double arrow, data lines for measured values in the direction of the central control unit 12 by simple arrows and process-influencing control signals from the central control unit 12 by dashed arrows.
  • the extrusion system 10 has an extrusion press 14.
  • the extrusion press 14 presses aluminum cylinders 16 (or cylinders made of an aluminum alloy) through a die 20 in a manner known per se, so that an extruded profile 18 is produced.
  • the cross section of the resulting profile 18 corresponds to pressing or crystalline
  • the balance of the energy balance results from the difference between all energies supplied (mechanical work and heat) and the energy dissipated (plastic deformation, heat conduction).
  • the essential for the hot forming process is the difference between all energies supplied (mechanical work and heat) and the energy dissipated (plastic deformation, heat conduction).
  • the resulting temperature of the extruded profile 18 as it emerges from the die 20 can be determined, for example, by the preheating temperature of the aluminum cylinders 16 and the process speed.
  • the aluminum cylinders 16 are heated by two-stage heating in two different furnaces 22 and 24.
  • a gas furnace 22 is particularly advantageous due to the relatively low energy costs.
  • the aluminum blocks 16 must remain in the gas furnace 22 for a longer period of time so that the inner areas of the aluminum block 16 are also
  • the induction furnace 24 is particular
  • the temperature To of the aluminum blocks 16 is measured by a pyrometer 26 before the aluminum blocks 16 enter the extrusion press 14
  • the temperature data 27 (T 0 ) obtained are transmitted to the central control unit 12 via a data line.
  • other devices such as temperature measuring devices with thermocouples are also conceivable here.
  • Measured values 32 can also be determined and transmitted to the central control unit 12 during the course of the extrusion process in the extrusion press 14. This can be, for example, temperature measurement values and / or distance
  • Act 500 data that shows how far the hydraulic ram has already moved forward. Force or pressure measured values can also be transmitted, which can also be recorded on the die 20, for example.
  • the temperature Ti (“pre-quenching ⁇ temperature Ti) of the extruded profile 18 is measured without contact by a further pyrometer 28. Those measured by pyrometer 28
  • the central control unit compares the incoming data 27, 29, 31, 32 with the target data stored in the central control unit 12. Based on the determined differences, the central control unit 12 calculates correction values for the, based on a mathematical model
  • the temperature of the extruded profile 18 can thus be adapted by a corresponding change in the extrusion speed v x , the compact temperature To and the compact deformation.
  • the central control unit 12 determines a correction data set, for example for the furnaces 22, 24, so that the temperature T o of the
  • the extrusion plant 10 the temperature of the induction furnace 24 is set such that the resultant extrusion pressure p in the range of 85 to 90 percent of the maximum pressure p r ⁇ ma to the
  • the extrusion pressure p to be used exceeds a certain value, in the present exemplary embodiment a value of 90 percent of the maximum pressure p max , additional hydraulic pumps are automatically switched on in order to apply the required pressure. It is also possible,
  • control is carried out via the control data of a not shown
  • the cooling takes place in such a way that the nitrogen cooling takes place only during an ongoing pressing, so that the die 20 does not cool down too much during an extrusion break, for example while a new aluminum cylinder 16 is inserted into the extrusion press 14
  • the nitrogen filling can be carried out in such a way that cooling takes place when certain temperature limit values are exceeded even if the machine operator has not switched it on.
  • the die 20 may have a temperature sensor, which may have an effect on the nitrogen cooling via the central control unit 12.

Abstract

L'invention concerne un procédé de façonnage thermorégulé de matériau ainsi qu'un dispositif (10) apte au façonnage thermorégulé de matériau selon ce procédé. Selon l'invention, immédiatement après que le matériau façonné (18) quitte le dispositif (14) de façonnage, la température (T1) du matériau façonné est mesurée au moyen d'un pyromètre (28) pour réajuster des paramètres de processus, notamment la température (To) du matériau à usiner (16) ou la vitesse d'usinage (vx). L'invention est caractérisée en ce que ce réajustement est influencé par au moins une valeur de mesure supplémentaire comme, par exemple, une température (T2) après une opération de trempe (34), une température de sortie de four (To) ou bien des données thermiques ou de position (32) du dispositif (14) de façonnage mesurées pendant le façonnage du matériau (16).
PCT/EP2004/010975 2003-10-07 2004-10-01 Procede de façonnage thermoregule de materiau et dispositif pour realiser ce procede WO2005035157A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003146992 DE10346992A1 (de) 2003-10-07 2003-10-07 Temperaturreguliertes Materialumformverfahren und Vorrichtung zur Durchführung des Verfahrens
DE10346992.3 2003-10-07

Publications (1)

Publication Number Publication Date
WO2005035157A1 true WO2005035157A1 (fr) 2005-04-21

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PCT/EP2004/010975 WO2005035157A1 (fr) 2003-10-07 2004-10-01 Procede de façonnage thermoregule de materiau et dispositif pour realiser ce procede

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DE (1) DE10346992A1 (fr)
WO (1) WO2005035157A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005047285A1 (de) * 2005-09-28 2007-03-29 Pandit, Madhukar, Prof. Dr.-Ing.habil. Verfahren und System zur automatischen Optimierung des Betriebs einer Strangpresse für Metalle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111283006B (zh) * 2020-02-26 2021-04-30 凯维思轻量化智能制造研究院(菏泽)有限公司 一种双向挤压成形的工艺及装备

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB655652A (en) * 1948-12-31 1951-07-25 Dow Chemical Co Improved method of producing continuous extruded metal articles
US3670542A (en) * 1969-12-04 1972-06-20 Reynolds Metals Co Extrusion method and apparatus
JPS56151118A (en) * 1980-04-24 1981-11-24 Fujisash Co Method and apparatus for extruding aluminum shape
DE3404054A1 (de) * 1984-02-06 1985-08-14 Proizvodstvennoe ob"edinenie "Uralmaš", Sverdlovsk Strasse zum isothermen pressen
US5325694A (en) * 1993-03-15 1994-07-05 Granco Clark, Inc. Extrusion billet taper quenching system
EP0747144A1 (fr) * 1993-11-10 1996-12-11 Valery Nikolaevich Shcherba Procede d'extrusion de metal a chaud avec l'aide active de forces de friction, et presse d'extrusion hydraulique prevue a cet effet
US5596895A (en) * 1992-04-06 1997-01-28 Bredal; Torben Method for the extrusion of metal or plastic profiles and apparatus for working method
JP2000271634A (ja) * 1999-03-25 2000-10-03 Kobe Steel Ltd 押出急冷時の製品温度制御方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB655652A (en) * 1948-12-31 1951-07-25 Dow Chemical Co Improved method of producing continuous extruded metal articles
US3670542A (en) * 1969-12-04 1972-06-20 Reynolds Metals Co Extrusion method and apparatus
JPS56151118A (en) * 1980-04-24 1981-11-24 Fujisash Co Method and apparatus for extruding aluminum shape
DE3404054A1 (de) * 1984-02-06 1985-08-14 Proizvodstvennoe ob"edinenie "Uralmaš", Sverdlovsk Strasse zum isothermen pressen
US5596895A (en) * 1992-04-06 1997-01-28 Bredal; Torben Method for the extrusion of metal or plastic profiles and apparatus for working method
US5325694A (en) * 1993-03-15 1994-07-05 Granco Clark, Inc. Extrusion billet taper quenching system
EP0747144A1 (fr) * 1993-11-10 1996-12-11 Valery Nikolaevich Shcherba Procede d'extrusion de metal a chaud avec l'aide active de forces de friction, et presse d'extrusion hydraulique prevue a cet effet
JP2000271634A (ja) * 1999-03-25 2000-10-03 Kobe Steel Ltd 押出急冷時の製品温度制御方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 0060, no. 36 (M - 115) 5 March 1982 (1982-03-05) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 13 5 February 2001 (2001-02-05) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005047285A1 (de) * 2005-09-28 2007-03-29 Pandit, Madhukar, Prof. Dr.-Ing.habil. Verfahren und System zur automatischen Optimierung des Betriebs einer Strangpresse für Metalle
DE102005047285B4 (de) * 2005-09-28 2008-09-18 Pandit, Madhukar, Prof. Dr.-Ing.habil. Verfahren zur Führung einer mit einer SPS gesteuerten und mit einer Profiltemperaturregelung und Pressgeschwindigkeitsregelung ausgestatteten Strangpresse für Metalle

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