EP2667132B1 - Installation de four et procédé de fonctionnement de l'installation de four - Google Patents

Installation de four et procédé de fonctionnement de l'installation de four Download PDF

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Publication number
EP2667132B1
EP2667132B1 EP13167263.6A EP13167263A EP2667132B1 EP 2667132 B1 EP2667132 B1 EP 2667132B1 EP 13167263 A EP13167263 A EP 13167263A EP 2667132 B1 EP2667132 B1 EP 2667132B1
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EP
European Patent Office
Prior art keywords
light metal
furnace system
metal components
furnace
air flow
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.)
Not-in-force
Application number
EP13167263.6A
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German (de)
English (en)
Other versions
EP2667132A2 (fr
EP2667132A3 (fr
Inventor
Jochem Grewe
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.)
Benteler Automobiltechnik GmbH
Original Assignee
Benteler Automobiltechnik GmbH
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Publication date
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Publication of EP2667132A2 publication Critical patent/EP2667132A2/fr
Publication of EP2667132A3 publication Critical patent/EP2667132A3/fr
Application granted granted Critical
Publication of EP2667132B1 publication Critical patent/EP2667132B1/fr
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Classifications

    • 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
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/007—Partitions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0073—Seals

Definitions

  • the present invention relates to a furnace for the thermal treatment of light metal components according to the features in the preamble of claim 1.
  • the present invention further relates to a method for the thermal treatment of light metal components according to the features in the preamble of claim 9.
  • the hot forming and Press-hardening technology gives the steel high-strength or even very high-strength properties, which has made it possible to reduce the specific weight of the components while at the same time increasing the strength values.
  • Another approach is the use of light metal components to reduce the specific weight of the vehicle body and thus the entire motor vehicle.
  • light metal components made of aluminum alloys are used.
  • furnace systems can only be operated inefficiently, which further increases the production costs of the already more expensive light metal material compared to steel.
  • Such furnaces are for example from the EP-A 1 475 446 , the WO-A 2007 055 650 , the US-A 1 865 954 as well as the US-A2 872 175 known.
  • Object of the present invention is therefore, starting from the prior art, to provide a furnace for the thermal treatment of light metal components and a method for operating the furnace, with the efficient mass production of light metal components can be carried out and which is inexpensive to operate.
  • the furnace installation according to the invention for the thermal treatment of light metal components wherein the light metal components are continuously conveyed through the furnace and the furnace has a heat source is in the furnace system, an air flow is recirculated and therefore only the energy occurring to the board or the component and as leakage currents must, wherein the light metal components are heated convectively in the furnace by the air flow and each entering the furnace system light metal component and each exiting from the furnace system Light metal component as a sealing bulkhead to prevent the air flow from escaping from the furnace.
  • sealing elements are arranged as exchangeable mold apertures (9), the mold apertures (9) having an opening (11) which is substantially transverse to the conveying direction (4) transverse surface of the components ( 2).
  • a light metal component may be an already completely formed component, but also a component in an intermediate molding stage or even a printed circuit board, which is formed after the thermal treatment.
  • Light metal components made of an aluminum alloy, in particular of an aluminum wrought alloy, are preferably treated with the furnace installation according to the invention.
  • the respective components are placed on a temporally clocked or continuously running conveyor, and then occur one behind the other at a uniform distance and preferably at regular intervals by additional bulkheads separated into the furnace system.
  • the furnace installation is formed in an inlet such that a light metal component entering the furnace system as well as an outlet of a light metal component exiting from the furnace system acts as a sealing bulkhead, so that the air flow circulated within the furnace system does not escape from the furnace system.
  • a delivery of the components to be heated is possible in such a way that the delivery is carried out continuously, so that no Interruption occurs.
  • components are placed on the conveyor belt continuously at the entrance of the furnace, transported through the furnace and removed at the exit of the furnace from the transporters again.
  • the continuous promotion is still to be understood in such a way that it operates in the cycle of production with upstream and downstream production equipment.
  • the conveyor belt can be stopped briefly each for placing a new component and then optionally for simultaneous removal at the outlet of the furnace system of the heated component and then start again, until the next component.
  • one or more heat sources are arranged which generate at least one predetermined temperature.
  • the temperature is preferably a temperature between 100 ° C. and 600 ° C., which then generates a flow of air through a circulating device, in particular through an air circulation device arranged inside the furnace in conjunction with a channel system formed in the furnace system Furnace transported light metal components flows.
  • the heated air flow then exchanges heat due to the forced convection with the surface of the light metal components, so that there is a heat transfer from air flow to light metal component.
  • the furnace system according to the invention uses the high thermal conductivity of aluminum in conjunction with the relatively large surface relative to the mass of the light metal component, so that within a very short time a thermal treatment, in particular a heating of the light metal component is feasible.
  • an exit region is again formed such that the air flow is prevented from escaping from the furnace by the emerging from the furnace light metal components.
  • the air stream may be any type of gas stream, for example also the stream of a reaction gas.
  • the furnace installation according to the invention has the advantage that the entire installation does not first have to be heated when it starts up at the start of production, but only the air circulated in the furnace installation has to be appropriately tempered.
  • the furnace system according to the invention can thus work with an effective efficiency, at significantly lower energy costs in relation to a heating system that operates on the heat radiation or even the induction principle.
  • it is possible in connection with a thermal encapsulation of the furnace reheat the once heated air flow through the heat source when circulating again and again only slightly, whereby the energy costs when operating the furnace system according to the invention is very low are.
  • the heat source is designed as an electric heater and / or as a fuel heater.
  • the heat source is installed inside the furnace after and / or in front of the circulation system.
  • the thus heated air flow or gas flow is particularly preferably passed directly to the light metal components, so that no flow losses between heated directly from the heat source air flow and a long flow channel system. After passing through the air flow of the light metal components, this meets a channel system and in turn is supplied to the circulation device, wherein it is reheated shortly before or after the circulation then again by a heat source arranged there to the desired temperature.
  • the choice of the heat source as electric heating or as a fuel heater is in particular of the energy availability, energy costs and the size of the furnace system according to the invention depends. For smaller quantities, it makes sense to use an electric heater. In the context of the invention, however, both types of heating can be combined, so that the furnace system can be used modularly for various purposes.
  • the circulating means are arranged as circulating air blowers within the furnace.
  • the circulating air blowers may for example also be arranged in the duct system or after passing through the air flow of the light metal components, so that the initially sometimes up to 600 ° C hot air flow or gas flow has cooled to the light metal components, before he the circulating air blower happens.
  • the circulating air fans are thus not exposed to the maximum temperatures of more than 400 ° C or even more than 500 ° C, but can be operated in a warm air flow at about 100 ° C to 400 ° C.
  • the circulating air blower can then be used in different blower stages, so that the air or gas flow velocity with which the air flow flows over the light metal components is adjustable.
  • This allows in conjunction with a temperature control two adjustment parameters, so that the heating of the light metal components by the flow velocity and / or the temperature of the air flow can be adjusted.
  • the furnace system is thermally encapsulated, wherein at the inlet and the outlet of the furnace sealing elements are arranged, wherein the sealing elements are designed as replaceable mold apertures.
  • the thermal encapsulation is, for example, a jacket insulation of the furnace, so that residual heat does not escape after passing through the light metal components or when passing the channel system from the furnace.
  • the inlet and the outlet are each designed so that successive light metal components that continuously enter the furnace system or emerge from this, the inlet and the outlet seal such that too small an amount of air circulating within the furnace air flow escapes. Unavoidable hot air / gas flow passing through gaps at the inlet and outlet can be collected by means of overlapping hoods and returned to the circulation, whereby the efficiency can be further increased.
  • the sealing elements are formed at the inlet and / or at the outlet, wherein the sealing elements are formed as a mold aperture.
  • the mold apertures that each map the cross-sectional area or orthogonal to the conveying direction spanning transverse surface of the light metal components through the mold apertures such that only a small gap occurs at a peripheral edge region .
  • the furnace system according to the invention is thus optionally available for light metal components with different geometric dimensions.
  • At least two temperature zones are preferably formed in the furnace installation, wherein the light metal components can be used as a sealing bulkhead between the zones, in particular interchangeable mold panels are arranged at a transition between the zones.
  • a first temperature zone and a second temperature zone is thus formed in an oven with two different temperature zones such that each passing from one zone to the other zone light metal component as a sealing bulkhead of a crossing, analogous to the principle at the entrance or on Exit the furnace system acts.
  • interchangeable mold panels are arranged so that in light metal components with different geometric dimensions from each other high air tightness is also formed between the zones.
  • the respective temperature zones can then in turn by selecting the air flow velocity and / or the air temperature from each other Various thermal heat treatment done.
  • two circulating air fans can then also be arranged, for example, which generate different flow velocities in the respective zone.
  • two heat sources may be arranged to produce different temperatures within the furnace.
  • the furnace installation can also have 3, 4, 5 or more zones, wherein it is again possible to assign a circulating-air blower and a heat source corresponding to each zone.
  • a temperature zone may also be formed as a cooling zone, so that here flows around in relation to the heat treatment zone cold air flow of, for example, only 50 ° C or even only 10 ° C, the light metal components.
  • the mold apertures have an opening which essentially corresponds to a transverse cutting surface of the light metal components arranged orthogonally to the conveying direction. This ensures that even with a slightly inclined light metal plate only small gaps in the passage of the board through the mold aperture are given, so that a loss of air flow is avoided.
  • the furnace installation has a drying zone in the region of its inlet and / or a cooling zone in the region of its outlet. This makes it possible to first dry in the drying zone located on the light metal components lubricant or other coating or to remove it from the light metal components. Subsequently, the light metal components are thermally treated in the at least one temperature zone and optionally then cooled again in a cooling zone located at the outlet of the furnace.
  • the cooling can be carried out at a component temperature of 100 ° C or even 50 ° C or even at room temperature.
  • a thermal treatment, solution annealing, aging, annealing controlled to be completed.
  • the circulated air flow within the furnace system when passing the light metal components is guided over this area, so that the air flow flows over the light metal components areally.
  • heat exchange of the heated / cold air or of the warm gas takes place on the lighter or warmer light metal component in relation thereto.
  • the respectively set in the light metal component temperature can then be adjusted in turn by selecting mutually different air temperatures or else from different flow rates. It is possible to adjust the parameters of temperature and flow rate in only one temperature zone, so that different components on the same furnace system are thermally treated. In the case of two or more temperature zones, it is also possible to individually adjust the flow rate and the temperature in each individual zone.
  • the light metal components are preferably transported on a conveyor belt, in particular on a chain conveyor, through the furnace system.
  • the conveyor belt in particular the chain conveyor, recordings with fixations, in which the light metal components, in particular in the form of boards are substantially vertically oriented storable.
  • the system becomes more compact. so that the air flow flows over the components substantially in the vertical orientation from bottom to top or from top to bottom.
  • the transport direction is then substantially in the horizontal direction, so that the vertically oriented components between the zones and at the inlet and at the outlet take over the respective Strömungsleit- and sealing function.
  • Components can be arranged at an angle.
  • the light metal components themselves are heatable to a temperature between 200 ° and 450 ° C within the furnace.
  • metallurgical processes of the respectively used aluminum alloy, in particular aluminum wrought alloy take place, which subsequently have a good formability or else a produced corresponding homogeneous microstructure with the desired strength properties.
  • the method according to the invention it is possible, in particular light alloy components arranged one behind the other, very particularly preferably to provide light metal blanks on a conveyor belt and to guide them continuously through a furnace installation.
  • a warm air or gas stream is then generated by means of a heat source and circulated by a circulating air blower so that the warm air or gas stream overflows the light metal components.
  • the light metal component itself then heats up due to the on the surface of the light metal component, in particular on an upper side and also a lower side of the Light metal components forced convection, whereby the light metal component, especially when using an aluminum alloy due to the good thermal conductivity in a very short time of sometimes only a few seconds can be heated.
  • the respective inlet opening or outlet opening is sealed by the respectively passing light metal component at an inlet and also at an outlet of the furnace system, so that the air or gas flow generated within the furnace system hardly escapes to the air surrounding the furnace.
  • two or three light metal components passing successively through the inlet opening can then assume a sealing function, as it were. The same applies to the outlet opening.
  • the furnace itself it is possible to adjust the heating of the light metal component by selecting the flow rate of the air or gas stream and / or the air or gas temperature of the air or gas stream. Also, two, three or more temperature zones may be subdivided within the furnace system, wherein in each zone then different heating effects are carried out on the light metal component by the parameters flow velocity of the air flow or else the temperature of the air flow.
  • thermally treated light metal components can be supplied in the context of the invention, in particular in a cycle time of less than 15 seconds per component to another processing method.
  • the kiln plant has a drying zone and a cooling zone, wherein in the drying zone the light metal components passing through the drying zone are dried, in particular a lubricant present on the light metal components is dried off. Furthermore, in a cooling zone, the light metal component can be cooled to a cold aging temperature.
  • a cooling zone is particularly preferably arranged at the end of the furnace, but it can also be between the individual Temperature zones one or more cooling zones are arranged so that a heated component is cooled and then reheated.
  • the mold apertures arranged in the furnace installation are preferably exchanged depending on the light metal components to be treated.
  • the mold apertures are selected in particular such that a transverse cutting surface, which is arranged orthogonally to the transport direction, seals in the best possible manner in conjunction with the light metal component passing through the mold aperture or even with two or three passing light metal components, so that the air flow can not escape.
  • FIGS. 6 to 10 show a furnace, which does not belong to the subject invention.
  • FIG. 1 shows an inventive furnace system 1 for the thermal treatment of light metal components 2 in the form of boards.
  • a conveyor belt 3 is equipped with the light metal components 2 and transports the light metal components 2 in the transport direction 4 in the furnace 1 into it.
  • the furnace 1 has an inlet E, through which the light metal components 2 enter the furnace 1.
  • the outlet A here the furnace 1 has an outlet A on.
  • the light metal component 2 then strikes a drying zone T, in which the light metal component 2 is dried by a possible lubricant.
  • a drying zone T circulates an air flow L, which flows around both a front side 5 and a rear side 6 of the light metal component 2.
  • the light metal component 2 passes into a first temperature zone Z1, in which an air flow L1 flows around the front side 5 and the rear side 6 of the light metal component 2.
  • the air flow L1 in the first temperature zone Z1 has a flow velocity v1 and a temperature T1, with which the light metal component 2 flows around and thus experiences a predetermined component temperature within the temperature zone Z1.
  • the light metal component 2 enters a second temperature zone Z2, in which it in turn with an air flow L2 on a front side 5 and a back 6 is overflowed, wherein the air flow L2 of the second temperature zone Z2 has a second flow velocity v2 and a second temperature T2.
  • a component temperature of the light metal component 2 is set when passing through the second temperature zone T2.
  • the light metal component 2 passes into a cooling zone Z3, the light metal component 2 in the cooling zone Z3 in turn being overflowed with an air flow L3 on the front 5 and back 6, which has a third flow velocity v3 and a third temperature T3 in particular, the temperature T3 is lower than the temperature T1 and T2 and the flow velocity v3 is higher than the flow velocities v1 and v2.
  • the component is cooled in the variant shown here in the cooling zone Z3 to a cooling temperature. Thereafter, the component occurs at an outlet A from the furnace 1 and is removed and thus supplied as a thermally treated component 7 of a further processing, not shown.
  • the individual air streams L can be generated from a circulating air fan not shown in detail, and then the flow speed v1, v2, v3 of the respective zone can be adjusted by means of variation of a cross section or a valve.
  • each zone its own circulating air blower. The same applies to the temperature. This can be heated by a heat source or else from different heat sources, for example, each temperature zone Z1, Z2 is assigned a separate heat source.
  • the light metal components 2 are arranged in the form of boards between plug-in devices 8, so that they are transported through the furnace installation 1 oriented substantially vertically in the transport direction 4.
  • FIG. 2 shown it is also possible, as in FIG. 2 shown to convey the boards substantially at an angle ⁇ through the furnace 1.
  • mold apertures 9 are shown in more detail in FIG FIG. 3 ,
  • FIG. 3 shows a mold panel 9 according to the invention in a plan view.
  • the light metal component 2 passes in the transport direction 4, so based on the image plane in this, the mold aperture 9, wherein between the outer edge 10 of the light metal component 2 and the opening 11, a gap 12 remains to minimize it, so that as little as possible Air flow L can escape via the gap 12 from the temperature zones Z1, Z2 or from the inlet E or outlet A of the furnace 1.
  • the light metal component 2 according to FIG. 3 has an asymmetric configuration, but it is also possible to lead large and small square boards by replacing the mold aperture 9 through the furnace 1.
  • FIG. 4 represented, in which a small light metal component 2 is detected by the mold panel 9, and indicated by the dashed line, by replacing the mold panel 9 also in the geometrical dimensions larger light metal component 2 is conveyed through the furnace 1, wherein each between the light metal component 2 and the mold plate 9 a small gap 12 remains.
  • FIG. 5 a cross-sectional view through the furnace installation 1 according to the invention, wherein the light metal component 2 is conveyed through the furnace installation 1 in the transport direction 4 and in the cross-sectional view is a plan view of a mold panel 9 is shown. It is for example shown a cross section through the temperature zone Z1.
  • a circulating air fan 13 that generates the air circulation within the temperature zone Z1.
  • the air flow L circulated by the circulating air blower 13 passes through a heating register 14 where it is heated and subsequently flows via the light metal component 2.
  • the air flow L is collected and in turn fed to the circulating air blower 13.
  • Shown here are also additional heating units 15, with which it is possible to heat the air flow L in addition to or also to heat exclusively, so that the heat source upstream of the circulating air blower 13 and not like the heating coil 14 is connected downstream.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Details (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Claims (13)

  1. Installation de four (1) pour le traitement thermique de pièces en métal léger (2), dans laquelle les pièces en métal léger (2) peuvent être transportées en continu à travers l'installation de four (1), et l'installation de four (1) présente une source de chaleur, dans laquelle un flux d'air (L) circule dans l'installation de four (1) et les pièces en métal léger (2) sont chauffées par convection par le flux d'air (L) dans l'installation de four (1), caractérisée en ce que des éléments d'étanchéité sont agencés en tant que panneaux façonnés échangeables (9) à l'entrée (E) et à la sortie (A), dans laquelle les panneaux façonnés (9) présentent une ouverture (11), qui correspondent sensiblement à une surface de membrure transversale des pièces en métal léger (2) agencée orthogonalement à la direction de transport (4) de sorte qu'une pièce en métal léger (2) entrant respectivement dans l'installation de four (1) et une pièce en métal léger (2) sortant respectivement de l'installation de four (1) sont réalisées en tant que cloison étanche empêchant le flux d'air (L) de s'échapper de l'installation de four (1).
  2. Installation de four selon la revendication 1, caractérisée en ce que la source de chaleur est réalisée en tant que chauffage électrique et/ou que la source de chaleur est réalisée en tant que chauffage à combustible.
  3. Installation de four selon la revendication 1 ou 2, caractérisée en ce qu'une soufflante de circulation (13) génère le flux d'air (L) à l'intérieur de l'installation de four (1).
  4. Installation de four selon l'une quelconque des revendications 1 à 3, caractérisée en ce que l'installation de four (1) présente au moins deux zones de température (Z1, Z2), dans laquelle les pièces en métal léger (2) peuvent être utilisées en tant que cloison étanche entre les zones (Z1, Z2, Z3), en particulier des panneaux façonnés échangeables (9) sont agencés au niveau d'un passage entre les zones (Z1, Z2, Z3).
  5. Installation de four selon l'une quelconque des revendications 1 à 4, caractérisée en ce que l'installation de four (1) présente une zone de séchage dans la zone de son entrée (E) et/ou que l'installation de four (1) présente une zone de refroidissement (Z3) dans sa zone de sortie (A).
  6. Installation de four selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le flux d'air (L) circulé s'écoule sur toute la surface des pièces en métal léger (2) lors du passage de l'installation de four (1), l'écoulement a lieu en particulier dans les différentes zones de température (Z1, Z2) avec des températures d'air différentes les unes des autres et/ou avec des vitesses d'écoulement différentes les unes des autres.
  7. Installation de four selon l'une quelconque des revendications 1 à 6, caractérisée en ce que les pièces en métal léger (2) peuvent être transportées sur une bande transporteuse (3), en particulier sur un transporteur à chaîne à travers l'installation de four (1).
  8. Installation de four selon l'une quelconque des revendications 1 à 7, caractérisée en ce que les pièces en métal léger (2) peuvent être chauffées à une température entre 200 et 450 °C.
  9. Procédé de traitement thermique de pièces en métal léger (2) dans une installation de four (1) selon au moins la revendication 1, caractérisé par les étapes de procédé suivante :
    - chargement d'une bande transporteuse (3) avec une pluralité de pièces en métal léger (2) alignées les unes derrière les autres, en particulier des plaques en métal léger
    - transport des pièces en métal léger (2) à travers l'installation de four (1), dans lequel l'ouverture d'entrée à une entrée (E) de l'installation de four (1) est rendue étanche par la pièce en métal léger (2) passant respectivement par l'ouverture d'entrée,
    - génération d'un flux d'air (L) chaud circulé en continu et écoulement sur les pièces en métal léger (2) dans au moins une zone de température (Z1, Z2) à l'intérieur de l'installation de four (1), pendant que la pièce en métal léger (2) continue d'être transportée en continu à travers l'installation de four (1), dans lequel les pièces en métal léger (2) sont chauffées par convection par le flux d'air (L) dans l'installation de four (1),
    - sortie des pièces en métal léger (2) traitées thermiquement de l'installation de four (1), dans lequel une ouverture de sortie au niveau d'une zone de sortie de l'installation de four (1) est rendue étanche par la pièce en métal léger (2) passant respectivement par l'ouverture de sortie.
  10. Procédé selon la revendication 9, caractérisé en ce que le chauffage des pièces en métal léger (2) est réglé par sélection de la vitesse d'écoulement du flux d'air (L) et/ou de la température d'air dans les différentes zones de température (Z1, Z2).
  11. Procédé selon la revendication 9 ou 10, caractérisé en ce que les pièces en métal léger (2) sont amenées à une cadence inférieure à 15 secondes à un autre procédé de traitement.
  12. Procédé selon l'une quelconque des revendications 9 à 11, caractérisé en ce que les pièces en métal léger (2) sont séchées dans la zone de séchage de lubrifiants et/ou sont refroidies à une température de vieillissement à froid dans la zone de refroidissement.
  13. Procédé selon l'une quelconque des revendications 9 à 12, caractérisé en ce que les panneaux façonnés (9) sont remplacés en fonction des pièces en métal léger (2) à traiter.
EP13167263.6A 2012-05-25 2013-05-10 Installation de four et procédé de fonctionnement de l'installation de four Not-in-force EP2667132B1 (fr)

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DE102012104537A DE102012104537A1 (de) 2012-05-25 2012-05-25 Ofenanlage sowie Verfahren zum Betreiben der Ofenanlage

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EP2667132A2 EP2667132A2 (fr) 2013-11-27
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EP2667132B1 true EP2667132B1 (fr) 2019-02-27

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DE102015003120A1 (de) * 2015-03-11 2016-09-15 Mall Herlan Mb Gmbh Temperiereinrichtung
US10335845B2 (en) 2016-04-20 2019-07-02 Ford Global Technologies, Llc Hot-stamping furnace and method of hot stamping
US10350664B2 (en) 2016-06-30 2019-07-16 Ford Global Technologies, Llc Furnace assembly and method for hot-stamping vehicle components

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EP0005940B1 (fr) * 1978-05-26 1982-10-20 The Hepworth Iron Company Limited Procédé, four et dispositif pour la cuisson de produits céramiques
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FR2647885B1 (fr) * 1989-05-31 1991-12-20 Mustad Fils Sa O Four-tunnel de forge a convoyeur a chaine de charges unitaires
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DE102005029780A1 (de) * 2005-06-24 2006-12-28 Otto Junker Gmbh Ofenanlage zum Anwärmen von langen Aluminiumsträngen
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DE102012104537A1 (de) 2013-11-28
EP2667132A2 (fr) 2013-11-27
EP2667132A3 (fr) 2013-12-18
US20130313763A1 (en) 2013-11-28

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