EP3406744A1 - Installation de traitement de tôle et procédé de fabrication d'un élément en tôle - Google Patents

Installation de traitement de tôle et procédé de fabrication d'un élément en tôle Download PDF

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Publication number
EP3406744A1
EP3406744A1 EP17172503.9A EP17172503A EP3406744A1 EP 3406744 A1 EP3406744 A1 EP 3406744A1 EP 17172503 A EP17172503 A EP 17172503A EP 3406744 A1 EP3406744 A1 EP 3406744A1
Authority
EP
European Patent Office
Prior art keywords
sheet
metal strip
sheet metal
strip
metal
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Withdrawn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
EP17172503.9A
Other languages
German (de)
English (en)
Inventor
Martin Heckmann
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.)
Lapple Automotive GmbH
Original Assignee
Lapple Automotive 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 Lapple Automotive GmbH filed Critical Lapple Automotive GmbH
Priority to EP17172503.9A priority Critical patent/EP3406744A1/fr
Publication of EP3406744A1 publication Critical patent/EP3406744A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/053—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working

Definitions

  • the invention relates to a sheet metal processing system and a method for producing a sheet metal component.
  • the sheet metal processing system includes, inter alia, a coil holding device in which a coil is rotatably mounted with wound metal strip.
  • the metal strip for the production of the sheet metal component is then unwound from the coil and fed to a material reservoir as a (band) buffer, e.g. a loop pit.
  • a material reservoir as a (band) buffer, e.g. a loop pit.
  • the metal strip of a press of the sheet metal processing plant is supplied, which then forms the sheet metal component from a band portion of the unwound metal strip and separates the band portion of the rest of the metal strip.
  • discontinuous production processes From the body-sheet metal component manufacturing, the handling and production of individual boards in discontinuous production processes is also known.
  • individual boards are subjected to a heat treatment at room temperature prior to their further processing in a press and the cold working implemented in order to increase the deformability, especially in high-strength aluminum alloys of the 7000er material group, eg AH7021 + v2.
  • Such discontinuous processes are for example from the WO 2014/053657 A1 , of the WO 2016/037922 A1 and the EP 3 006 579 A1 known.
  • the present invention seeks to improve the production of a sheet metal component in a continuous manufacturing process and in particular to allow the production of sheet metal components made of high-strength aluminum alloys with higher output.
  • a heat treatment device is provided between the material storage and the coil holding device within the sheet metal processing plant, by means of which during operation of the sheet metal processing plant continuously conveyed in the direction of the material storage metal strip is heated to solution annealing temperature and then quenched.
  • a heat treatment in the manner of a so-called W-tempering process is thus pre-stored in a continuous process of component forming, wherein this heat treatment is carried out on the continuously passing metal strip and therefore not on a single already separated board.
  • the heat treatment device for heating to solution annealing temperature on at least one (AC) induction coil.
  • AC AC induction coil
  • the use of at least one induction coil and thus the implementation of the heat treatment by means of induction is not only relatively fast and precise, but also allows a homogeneous heating of the metal strip in the heat treatment device.
  • the heat treatment device can build much more compact than, for example, a continuous furnace.
  • induction coils may be provided. These can, for example, be connected in series and / or operated individually or in combination in order to increase the flexibility of the sheet metal processing plant with regard to the sheet metal thickness of the metal strip to be processed and / or the feed rate and / or the target temperature range.
  • the number of operated induction coils is thus variable depending on a sheet thickness and / or the desired feed rate and / or the target temperature range of the metal strip in the sheet metal processing plant.
  • the induction coils of the heat treatment device can be operated with different frequencies when using multiple inductors and converter provided for this purpose.
  • the inverter frequencies for inductive heating are in this case, for example, 25 kHz to 100 kHz.
  • the heat treatment device in a possible development has at least one deflection point at which the metal strip is deflected during operation of the sheet metal processing system.
  • the at least one induction coil of the heat treatment device is arranged between two deflection points, so that the metal strip for the supply in the region in which the inductive heating takes place, is deflected at least once and is deflected at least once again after the heating.
  • the heat treatment device for heating the metal strip (or more precisely, for heating the strip section of the metal strip currently being conveyed by the heat treatment device) can be set up and provided to a target temperature between 370 ° C. and 560 ° C. In a refinement based thereon, the heat treatment device is set up and provided for heating to a target temperature between 460 ° C. and 530 ° C.
  • the heat treatment device is arranged in a variant embodiment and provided to heat the metal strip (a) to a target temperature, for example, to a target temperature in the range of 460 ° C to 530 ° C, and (b) for a holding time in the range from 1 s to 30 s, in particular in the range of 1 s to 10 s or in the range of 1 s to 5 s, in a target temperature range around the target temperature. It is thus provided a comparatively small holding time.
  • the target temperature is not maintained. It can thus be provided in a development of a "hold time" of 0 seconds.
  • the target temperature range is here e.g. at ⁇ 10 K or ⁇ 5 K around the target temperature specified for the material of the metal strip.
  • the heat treatment device may further be configured such that the heating of the metal strip in the heat treatment device to a temperature in the range of ⁇ 5 K to the predetermined target temperature and / or occurring during the heating over a bandwidth of the metal strip temperature gradient less than ⁇ 10 K, in particular ⁇ 3 K.
  • a cooling medium For the quenching of the metal strip cooling by means of a cooling medium can be provided.
  • a water bath is part of the heat treatment device.
  • the water bath can be added, for example, additives that are beneficial to the quenching process in different ways, for example Aquatenside or Aqua-Quench ® .
  • a deflection point is provided in the water bath, at which the metal strip is deflected during operation of the processing system.
  • the quenched metal band is thus deflected within the water bath in order to achieve the most compact arrangement of the water bath within the sheet metal processing plant.
  • the deflection is, for example, greater than 90 °, in one embodiment, even greater than 160 °.
  • a deflection point is provided at which the metal strip is deflected after the water bath during operation of the sheet metal processing installation. Following this deflection point, the quenched metal strip is then fed, for example, to a straightening system or to the material reservoir, ie, e.g. a loop pit.
  • devices for a surge, bubbling, spray or trickle cooling can also be integrated into the heat treatment device for the continuous metal strip quenching by means of a cooling medium.
  • a cooling medium for quenching of the metal strip after solution annealing, for example, at least one compressed air shower or a salt bath can be provided, for example.
  • a vapor extraction may also be part of the heat treatment device.
  • At least one device for the flexible compensation of strip length expansions and shrinkages can be provided at a deflection point.
  • a device at a deflection point for the metal strip then comprises, for example, a spring-mounted deflecting element.
  • at least one deflecting point is provided with at least one spring-mounted deflecting roller for band length compensation.
  • the sheet metal processing plant can basically include a straightening system, in the passage through the metal strip is smoothed.
  • a straightening system thus, for example, distortions are eliminated, which can be caused inter alia by the heat treatment in the heat treatment device.
  • the straightening system can in principle be arranged before or after the material storage.
  • the sheet metal processing installation comprises a device by means of which cooling medium used for quenching during operation of the sheet metal processing installation is removed from the metal strip.
  • the sheet metal processing installation comprises a blow-off device for generating at least one air flow, by means of which the cooling medium used for quenching during operation of the sheet metal processing installation is removed from the metal strip.
  • the blow-off device for example, at least one air curtain can be generated, through which the metal strip is conveyed in the direction of the material reservoir.
  • the discharge device then has, for example, a plurality of flat jet nozzles.
  • the device for removing the cooling medium may comprise at least one nip roll.
  • the heat treatment device can be bridged within the sheet metal processing plant and thus the sheet metal processing plant can be operated without a heat treatment device.
  • the sheet metal processing system can also be operated such that continuously conveyed to the material storage metal strip is not heated and quenched.
  • the heat treatment device can be moved out of the sheet metal processing plant, for example, with the means provided for heating to the solution annealing temperature and for subsequent quenching.
  • the heat treatment device can in particular be modular in this context, so that the heat treatment device can also be integrated later in an existing sheet metal processing plant if necessary, to be arranged between a coil holding device and a material storage, such as a loop pit, and the adjoining press.
  • a sheet metal forming plant for sheet metal forming and thus creating a (sheet) sheet metal component is provided, which can process high-strength aluminum alloys if required, but at the same time - without switching the heat treatment device - can handle conventional sheet metal grades without upstream heat treatment.
  • a sheet metal processing system is set up and provided, for example, for processing metal strips having a sheet thickness between 0.8 mm to 4.5 mm, in particular 1.0 mm to 3.0 mm.
  • Possible bandwidths to be processed are, for example, 200 mm to 2000 mm, in particular 400 mm to 1700 mm.
  • An exemplary feed rate for the promotion of the unwound metal strip is in a variant in the range of 200 mm / s to 700 mm / s, for example in the range of 300 mm / s to 500 mm / s.
  • a method according to the invention can be carried out in particular by means of a sheet metal processing installation according to the invention. Accordingly, advantages and features set forth above and below for embodiments of a sheet metal processing system according to the invention also apply to variants of a production method according to the invention and vice versa.
  • the attached figures illustrate by way of example possible embodiments of the proposed solution.
  • FIG. 1 shows a variant of a sheet metal processing system according to the invention A, in which a continuously unwound from a coil C metal strip B a press P of the sheet metal processing plant A is supplied to produce from this single sheet metal components, for example, body parts for a motor vehicle.
  • the coil C is rotatably supported on a reel H of a coil holding device E of the sheet metal processing installation A and can be unwound therefrom and conveyed along a conveying direction F to the press P.
  • the press P is a material storage in the form of a loop pit S upstream as a (band) buffer.
  • the loop pit S follows a straightening system R of the sheet metal processing plant A, at which a smoothing of the metal strip B takes place.
  • a heat treatment device W is provided between the coil holding device E and the straightening system R.
  • the continuously conveyed metal strip B is first heated to the solution annealing temperature by means of an induction heater 1, which has at least one (alternating current) induction coil, optionally a plurality of induction coils. Due to the inductive heating, induction heating 1 is extremely compact.
  • the metal strip B is further deflected in front of the induction heater 1 via a deflection point 5c, on which an optionally resiliently mounted deflection roller is provided.
  • a water bath 2 Downstream of the induction heater 1 within the heat treatment device W is a water bath 2 for quenching the metal strip B.
  • the metal strip B Within the water bath 2, the metal strip B is deflected at a further deflection point 5b. Above the water bath 2, a steam extraction 4 is also provided.
  • the metal strip B After quenching in the water bath 2, the metal strip B is passed through a blow-off device 3 in which cooling medium used for quenching by means of at least one air flow is removed from the water bath 2 from the metal strip B. Subsequently, the metal strip B is again deflected at a deflection point 5a (via a spring-mounted deflection roller) and fed to the straightening system R.
  • the sheet metal processing plant A With the illustrated sheet metal processing plant A, a press shop process with integrated W temper heating is shown within the sheet metal processing plant. Heat treatment and pressing thus take place here directly on the same sheet metal processing plant A. Accordingly, the sheet metal processing plant A integrates four different processing processes, which in the FIG. 1 marked with "A" to "D".
  • the processing process marked "C”, which is implemented by the heat treatment device W, can in the sheet metal processing plant A of the FIG. 1 be optional.
  • the heat treatment device W is for this purpose, for example, modular and provided extendable to the sheet metal processing plant A, so that the coiled metal strip B from the coil holding device E without heat treatment and thus directly the straightening system R and then the loop pit S can be supplied.
  • the sheet metal processing plant A is again provided with a heat treatment device W for the inductive heating of the continuously conveyed metal strip B.
  • the in the FIG. 1 schematically illustrated press P is in the FIG. 2 omitted for the sake of clarity.
  • the heat treatment device W more compact by the metal strip B is deflected in the water bath 2 at the deflection point 5b by almost 180 ° and the metal strip B is deflected by more than 60 ° before entering the induction heater 1 and before entering the straightening system R.
  • the induction heater 1 in the variant of FIG. 2 longer, so along the conveying direction F a larger band section within the induction heater 1 is heated.
  • a larger number of induction coils are arranged one behind the other and selectively operable to heat metal strips B of different thicknesses to the desired target solution-annealing temperature.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
EP17172503.9A 2017-05-23 2017-05-23 Installation de traitement de tôle et procédé de fabrication d'un élément en tôle Withdrawn EP3406744A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17172503.9A EP3406744A1 (fr) 2017-05-23 2017-05-23 Installation de traitement de tôle et procédé de fabrication d'un élément en tôle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17172503.9A EP3406744A1 (fr) 2017-05-23 2017-05-23 Installation de traitement de tôle et procédé de fabrication d'un élément en tôle

Publications (1)

Publication Number Publication Date
EP3406744A1 true EP3406744A1 (fr) 2018-11-28

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EP17172503.9A Withdrawn EP3406744A1 (fr) 2017-05-23 2017-05-23 Installation de traitement de tôle et procédé de fabrication d'un élément en tôle

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020123807A1 (fr) * 2018-12-12 2020-06-18 Peter Von Czarnowski Procédé et système de traitement thermique de feuille d'alliage métallique
WO2021076473A1 (fr) * 2019-10-16 2021-04-22 Novelis Inc. Ligne de trempe rapide

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10039882A1 (de) * 2000-08-16 2002-03-07 Mueller Weingarten Maschf Anlage zur Herstellung von Platinen
WO2010142579A1 (fr) * 2009-06-12 2010-12-16 Aleris Aluminum Koblenz Gmbh Pièce de structure d'automobile fabriquée à partir d'un produit d'alliage d'al-zn-mg-cu et son procédé de fabrication
DE102010045025A1 (de) * 2010-09-10 2011-05-05 Daimler Ag Verfahren zum Herstellen eines Umformteils sowie Anlage zum Herstellen eines Umformteils
DE102012007213A1 (de) * 2012-04-11 2012-11-29 Daimler Ag Verfahren zur Herstellung eines Aluminiumformteils
WO2014053657A1 (fr) 2012-10-05 2014-04-10 Linde Aktiengesellschaft Préchauffage et recuit de bande de métal laminée à froid
WO2016037922A1 (fr) 2014-09-12 2016-03-17 Aleris Aluminum Duffel Bvba Procédé de recuit de matériau de feuille d'alliage d'aluminium
EP3006579A1 (fr) 2014-12-11 2016-04-13 Aleris Aluminum Duffel BVBA Procédé de traitement thermique en continu de matériau de feuille d'alliage d'aluminium de la série 7000

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10039882A1 (de) * 2000-08-16 2002-03-07 Mueller Weingarten Maschf Anlage zur Herstellung von Platinen
WO2010142579A1 (fr) * 2009-06-12 2010-12-16 Aleris Aluminum Koblenz Gmbh Pièce de structure d'automobile fabriquée à partir d'un produit d'alliage d'al-zn-mg-cu et son procédé de fabrication
DE102010045025A1 (de) * 2010-09-10 2011-05-05 Daimler Ag Verfahren zum Herstellen eines Umformteils sowie Anlage zum Herstellen eines Umformteils
DE102012007213A1 (de) * 2012-04-11 2012-11-29 Daimler Ag Verfahren zur Herstellung eines Aluminiumformteils
WO2014053657A1 (fr) 2012-10-05 2014-04-10 Linde Aktiengesellschaft Préchauffage et recuit de bande de métal laminée à froid
WO2016037922A1 (fr) 2014-09-12 2016-03-17 Aleris Aluminum Duffel Bvba Procédé de recuit de matériau de feuille d'alliage d'aluminium
EP3006579A1 (fr) 2014-12-11 2016-04-13 Aleris Aluminum Duffel BVBA Procédé de traitement thermique en continu de matériau de feuille d'alliage d'aluminium de la série 7000

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020123807A1 (fr) * 2018-12-12 2020-06-18 Peter Von Czarnowski Procédé et système de traitement thermique de feuille d'alliage métallique
US12215412B2 (en) 2018-12-12 2025-02-04 Elkeme Hellenic Research Centre For Metals S.A. Method and system for heat treatment of metal alloy sheet
WO2021076473A1 (fr) * 2019-10-16 2021-04-22 Novelis Inc. Ligne de trempe rapide
CN114585753A (zh) * 2019-10-16 2022-06-03 诺维尔里斯公司 快速淬火生产线
CN114585753B (zh) * 2019-10-16 2024-05-14 诺维尔里斯公司 快速淬火生产线

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