EP0995805B9 - Heat treatment installation for a batch of metallic workpieces - Google Patents

Heat treatment installation for a batch of metallic workpieces Download PDF

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Publication number
EP0995805B9
EP0995805B9 EP19980811062 EP98811062A EP0995805B9 EP 0995805 B9 EP0995805 B9 EP 0995805B9 EP 19980811062 EP19980811062 EP 19980811062 EP 98811062 A EP98811062 A EP 98811062A EP 0995805 B9 EP0995805 B9 EP 0995805B9
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EP
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Grant
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Prior art keywords
furnace
characterised
installation according
tank
charge
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 - Fee Related
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EP19980811062
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German (de)
French (fr)
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EP0995805B1 (en )
EP0995805A1 (en )
Inventor
Pierre Beuret
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Pierre Beuret
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00Subject matter not provided for in other groups of this subclass
    • F27D99/0073Seals
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0037Rotary furnaces with vertical axis; Furnaces with rotating floor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00Furnaces of a kind not covered by any preceding group
    • F27B17/0016Chamber type furnaces
    • F27B2017/0091Series of chambers, e.g. associated in their use
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14Furnaces 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
    • F27B9/16Furnaces 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 circular or arcuate path
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00Charging; Discharging; Manipulation of charge
    • F27D2003/0034Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0036Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising inflatable or extendable parts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00Charging; Discharging; Manipulation of charge
    • F27D2003/0034Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0075Charging or discharging vertically, e.g. through a bottom opening
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00Cooling of furnaces or of charges therein
    • F27D2009/007Cooling of charges therein
    • F27D2009/0089Quenching
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D7/00Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/06Forming or maintaining special atmospheres or vacuum within heating chambers

Description

La présente invention se réfère à une installation pour le traitement thermique d'une charge de pièces métalliques, cette installation comprenant au moins un four sous gaz de protection ou sous vide et au moins un bac de trempe selon l'introduction de la revendication 1. The present invention refers to an installation for the heat treatment of a charge of metal parts, said installation comprising at least one furnace under protective gas or under vacuum and at least one quench box assembly according the introduction of claim 1.

Les installations connues proposées sur le marché ont l'inconvénient, pour les traitements sous vide d'une charge de pièces métalliques, de devoir charger l'installation à four froid puis d'effectuer le vide pour évacuer l'oxygène de la chambre de chauffe du four. Known installations offered on the market have the disadvantage for vacuum treatments of a load of metal parts, having to load the installation cold oven and then perform a vacuum to remove the oxygen in the combustion chamber from the oven. Après le traitement on est obligé de refroidir le tout dans le four y compris la charge. After the treatment you have to cool in the oven including the charge. Sans sas ou bac de chargement il est alors impossible de travailler avec le four chaud, car toute présence d'oxygène détériorerait les éléments chauffants. Without lock or loading tray then it is impossible to work with the hot oven, because any presence of oxygen deteriorate the heating elements.

Une installation de traitement thermique est connue par EP-A-806 485. Ce document divulgue une installation avec un sas et des joints pour effectuer le transfert étanche de la charge du four dans un bac ou vice versa. A heat treatment system is known from EP-A-806 485. This document discloses a system with a lock and gaskets to perform the tight transfer the furnace charge in a tray or vice versa. A part le fait de devoir utiliser un sas, cette installation ne permet pas d'éviter l'oxydation de la surface des pièces de la charge, la pollution et le refroidissement du four pendant le cycle complet de travail. Apart from having to use a sluice, this installation does not prevent oxidation of the surface of the parts of the load, pollution and the cooling of the furnace during the entire cycle of work.

EP-A-893 510, qui ne constitue pas une antériorité publiée avant la date de dèpôt, divulgue une installation pour le traitement thermique automatique, comprenant des joints. EP-893 510, which is not a prior published before the filing date, discloses a system for automatic heat treatment, including seals. Toutefois, les deux ensembles de cette installation sont stationnaires et il n'est donc pas possible de mettre n'importe quel bac en regard d'un four. However, both sets of this facility are stationary and therefore it is not possible to put any tray next to an oven. En outre, cette construction ne permet pas de maintenir l'étanchéité des fours et des bacs pendant un cycle de travail. In addition, this construction does not allow to maintain the seal ovens and pans during a work cycle.

A partir de cet état de la technique connue, un but de la présente invention est de réaliser une installation de traitement thermique ne nécessitant pas de refroidir le four, et permettant de traiter les pièces y inclus leurs transfer sans oxydation de surface et sans pollution des gaz de traitement du four ou sans pollution du vide du four pendant tout le cycle de travail. From this state of the prior art, an object of the present invention is to provide a heat treatment system not requiring the oven to cool, and for processing the parts including their transfer without surface oxidation and pollution-free the furnace process gas or vacuum without pollution of the furnace during the whole working cycle.

En outre sont connus des fours à passage ou des fours poussant à charge longue dont l'installation nécessite une très grande surface et surtout une grande longueur et dont le cycle de travail pour la charge et la décharge du four et, de plus, long. Also are known passage kilns or ovens pushing long load whose installation requires a very large area and especially great length and whose work cycle to the charge and discharge of the oven and, moreover, long.

Partant de cet état de la technique connue, un autre but de la présente invention est de réduire sensiblement aussi bien la longueur d'une telle installation que le temps de traitement. Starting from this state of the prior art, another object of the present invention to substantially reduce both the length of such a plant that the processing time.

Ces buts sont atteints grâce aux moyens définis dans la revendication indépendante 1. These objects are achieved by the means defined in independent claim 1.

L'invention sera expliquée en détail, en se référant aux dessins ci-annexés qu'en présentent, à titre d'exemples, des formes d'exécution. The invention is explained in detail, with reference to the accompanying drawings that show, by way of examples of embodiments.

La figure 1 Figure 1
est une vue en élévation schématique d'une forme d'exécution de l'installation selon l'invention, is a schematic elevational view of an embodiment of the installation according to the invention,
la figure 2 Figure 2
est une vue en plan de dessus schématique de l'installation de la figure 1, is a schematic top plan view of the installation of Figure 1,
les figures 3A à 3L 3A to 3L
sont un descriptif d'un cycle de travail de l'installation selon la figure 1, are descriptive of a working cycle of the installation according to Figure 1,
la figure 4 Figure 4
est une vue en élévation schématique d'une deuxième forme d'exécution selon l'invention, is a schematic elevational view of a second embodiment according to the invention,
la figure 5 Figure 5
est une vue en plan de dessus schématique de l'installation de la figure 4, is a schematic top plan view of the installation of Figure 4,
les figures 6A - 6K 6A - 6K
sont un descriptif schématique d'un cycle de travail de l'installation selon les figures 4 et 5, is a schematic description of a working cycle of the installation according to Figures 4 and 5,
la figure 7 Figure 7
est une vue en élévation schématique d'une troisième forme d'exécution de l'installation selon l'invention, is a schematic elevational view of a third embodiment of the installation according to the invention,
les figures 8A - 8L 8A - 8L
sont un descriptif schématique d'un cycle de travail de l'installation selon la figure 7, is a schematic description of a work cycle of the installation according to Figure 7,
la figure 9 Figure 9
est une vue en élévation schématique d'une autre installation selon l'invention, is a schematic elevational view of another installation according to the invention,
les figures 10A - 10L Figures 10A - 10L
sont un descriptif schématique d'un cycle de travail de l'installation selon la figure 10, is a schematic description of a work cycle of the installation according to Figure 10,
la figure 11 Figure 11
est une vue en élévation schématique d'une autre installation selon l'invention, is a schematic elevational view of another installation according to the invention,
les figures 12A - 12P Figures 12A - 12P
sont un descriptif schématique d'un cycle de travail de l'installation selon la figure 11, is a schematic description of a working cycle of the installation according to Figure 11,
la figure 13 Figure 13
est une vue en élévation schématique d'une installation avec un four et quatre bac, is a schematic elevational view of an installation with an oven and four tray,
la figure 14 Figure 14
est une vue en plan de dessus schématique de l'installation selon la figure 13, is a schematic top plan view of the installation according to Figure 13,
la figure 15 Figure 15
est une vue en élévation transversale d'une installation en ligne selon l'invention, is a transverse elevational view of an in-line installation according to the invention,
la figure 16 Figure 16
est une vue en élévation longitudinale schématique de l'installation selon la figure 15, is a diagrammatic longitudinal elevational view of the installation according to Figure 15,
la figure 17 Figure 17
est une vue en plan de dessus schématique de l'installation selon la figure 15, is a schematic top plan view of the installation according to Figure 15,
la figure 18 Figure 18
est une vue en élévation longitudinale schématique d'une installation avec four poussant à charge longue, is a schematic longitudinal elevation view of an installation with long pusher furnace load,
la figure 19 Figure 19
est une vue de front schématique d'un four de l'installation selon la figure 18, is a schematic edge of a furnace installation according to Figure 18,
la figure 20 Figure 20
est une vue de front d'un bac de l'installation selon la figure 18, is a front view of a tray of the installation according to Figure 18,
la figure 21 Figure 21
est une vue en plan de dessus schématique de l'installation de la figure 18, et is a schematic top plan view of the installation of Figure 18, and
la figure 22 Figure 22
est un grossissement partiel de la figure 21. is a partial magnification of FIG 21.

Les figures 1 et 2 montrent schématiquement une première forme exécution d'une installation selon l'invention avec un four de traitement pour une température maxima de 1100°C et deux bacs montés sur une table rotative. Figures 1 and 2 schematically show a first embodiment implementing an installation according to the invention with a treatment furnace to a maximum temperature of 1100 ° C and two trays mounted on a rotary table. Cette installation permet par exemple des traitement d'austénitisation, de recuit, de revenu, de frittage ou de brasage. This installation allows for example austenitization treatment, annealing, income, sintering or brazing. Le four 1 comprend une chambre de chauffage 2 avec une turbine de circulation des atmosphères 3, un bouchon 4 comme support de la charge à traiter 5 et deux bacs, c'est-à-dire. The oven 1 comprises a heating chamber 2 with a turbine flow atmospheres 3, a stopper 4 as a carrier for feed to be treated 5, and two tanks, that is to say. deux chambres de chargement ou refroidissement 6 et 7. Le bouchon support de charge est déplacé verticalement par les deux pistons élévateurs 8 et 9, comme c'est indiqué par les deux flèches doubles. two load or cooling chambers 6 and 7. The load bearing cap is moved vertically by the two lifting pistons 8 and 9, as indicated by the two double arrows. Ces pistons élévateurs sont prévus pour le chargement ou déchargement des charges dans le four ou dans les bacs, comme cela ressortira du descriptif d'un cycle de travail avec cette installation. These lifting pistons are provided for charging or discharging charges in the oven or in the trays, as will become apparent the description of a working cycle with this installation. Le four comprend en outre un corps de chauffe 10 et une double chemise isolée 11 selon l'art de la technique connue. The oven further comprises a heating body 10 and a insulated double jacket 11 according to the art of the known art.

Le four 1 est fixé sur une table supérieure 12 tandis que les bacs, c'est-à-dire les chambres de chargement ou refroidissement 6 et 7 avec les pistons élévateurs 8 et 9 sont fixés à une table rotative 13. La table fixe 12 est montée sur un support 14. La table rotative 13 est entraínée en rotation par un moteur 15. Entre la table fixe et la table rotative se trouvent deux jeux de joints, un joint extérieur 16 pour établir l'étanchéité au gaz et au vide et deux joints intérieurs 17 et 18, qui forment une première barrière d'étanchéité entre les bacs et la table fixe supérieure. The furnace 1 is fixed on an upper table 12, while the trays, that is to say the loading chambers cooling or 6 and 7 with the lifting pistons 8 and 9 are attached to a rotary table 13. The stationary table 12 is mounted on a carrier 14. the rotary table 13 is rotated by a motor 15. Between the stationary platen and the turntable are two sets of joints, an outer seal 16 to seal the gas and vacuum and two inner seals 17 and 18, which form a first sealing barrier between the trays and the upper fixed table. Tous les joints sont des joints gonflables, connus en soi dans l'art antérieur, et sont partiellement dégonflés dans le cas où la table rotative est mise en rotation, et ensuite gonflés pour assurer l'étanchéité. All seals are inflatable seals known per se in the prior art, and are partially deflated in the case where the rotary table is rotated, and then inflated to seal.

Chaque chambre de chargement ou de refroidissement 6 et 7 comprend une turbine de circulation des atmosphères 19 et 20, une pompe à vide 21 commune qui est reliée par des vannes 22 et 23 auxdites chambres de chargement ou refroidissement. Each loading chamber or cooling 6 and 7 comprises a turbine flow atmospheres 19 and 20, 21 a common vacuum pump which is connected by valves 22 and 23 to said loading or cooling chambers. Chaque bac 6 et 7 comprend une amenée 24 et 25 d'azote et le four comprend une amenée de gaz 26. Each tray 6 and 7 comprises a 24 and 25 nitrogen inlet and the oven comprises a gas supply 26.

La table supérieure comprend une porte 27 qui possède un joint 28 et qui permet l'introduction de la charge dans un des bacs. The upper table comprising a door 27 which has a seal 28 which permits the introduction of charge in one of the trays. Un remplissage à l'azote par exemple ou un autre gaz permet de transférer la charge à traiter dans le four sous gaz de protection ou sous vide. A nitrogen gas for example, or another gas is used to transfer the charge to be treated in the furnace under protective gas or in vacuo. Le four restant toujours à température permet d'effectuer un des traitements précités. The oven still remaining temperature allows any of the above treatments. A la fin du cycle de chauffe, la charge est évacué dans une des deux chambres pour refroidissement. At the end of the heating cycle, the charge is discharged into one of the chambers for cooling. Avant la rotation pour le transfert et le refroidissement, on aura préparé une nouvelle charge à traiter dans le bac libre de toute charge. Before the rotation for the transfer and cooling, has prepared a new charge to be treated in the open tray of any charge. Il est ainsi possible de traiter, par alternance, des pièces sans oxydation de surface et sans refroidissement du four ainsi que sans pollution de gaz de traitement ou du vide du four. It is thus possible to treat, alternately, surface oxidation without parts and without cooling the furnace and without process gas pollution or the vacuum oven.

Il est évident que l'on peut réaliser une installation avec des bacs, c'est-à-dire. It is obvious that one can make an installation with ferries, that is to say. des chambres de chargement/déchargement ou refroidissement à gaz ou à l'huile fixées au support et à la table supérieure et prévoir un ou plusieurs four(s) rotatif(s). of loading chambers / unloading or gas cooling or oil attached to the support and the upper table and provide one or more furnace (s) rotating (s).

Les figures 3A - 3L) montrent schématiquement un cycle de travail. 3A - 3L) schematically show an operating cycle. La figure 3A montre la préparation de la charge 5 et on voit que la porte 27 est ouverte. 3A shows the preparation of the load 5 and we see that the door 27 is open. La figure B montre le conditionnement de la charge par le vide et la figure C la descente du bouchon gauche 4 pour l'ouverture du four. Figure B shows the packaging of the load by the vacuum and Figure C the descent of the left cap 4 to open the oven. La figure D montre la rotation des bacs pour mettre la charge 5 sous le four, avant son introduction dans celui-ci (figure E), pour entamer le cycle de traitement. Figure D shows the rotation bins to the load 5 in the furnace, before being introduced therein (Figure E), to initiate the treatment cycle. La figure F montre la préparation d'une deuxième charge 5A pendant le cycle de traitement de la première, et la figure G le conditionnement de cette charge 5A par le vide. Figure F shows the preparation of a second charge 5A during the treatment cycle of the first, and Fig G the packaging of this load 5A by vacuum. La figure H montre l'ouverture du four et la descente de la charge 5, et la figure I la rotation des bacs avec refroidissement immédiat de la charge 5. La figure K montre l'introduction de la charge 5A dans le four pour effectuer le cycle de traitement pendant le refroidissement de la charge 5. Enfin, la figure L montre la charge 5A en cours de cycle de traitement en cours et l'évacuation de la charge 5, ainsi que la mise en place d'une nouvelle charge 5B. Figure H shows the opening of the furnace and the lowering of the load 5, and Figure I the rotation of trays with immediate cooling of the load 5. Figure K shows the introduction of the load 5A in the furnace to effect the treatment cycle during cooling of the load 5. Finally, Figure 5A L shows the load current of current treatment cycle and discharge of the load 5, as well as the establishment of a new charge 5B.

Ce cycle des opérations montre le grand avantage de cette installation selon l'invention permettant d'une part de préparer une charge tandis que l'autre est dans le four et, surtout, d'amener et d'évacuer la charge du four sans pollution du vide ou du gaz dans le four et sans oxydation des charges. This cycle of operations shows the great advantage of this installation according to the invention for preparing a part of a load while the other is in the oven, and above all to bring and evacuate the furnace charge without pollution the vacuum or gas into the furnace and without oxidation fillers. Toutes les opérations décrites s'effectuent d'une manière étanche envers l'extérieur par le joint extérieur 16 est les joints intérieurs 17 et 18. All the operations described are performed in a sealed manner towards the outside by the outer seal 16 is the inner seals 17 and 18.

Les figures 4 et 5 montrent une deuxième forme d'exécution de l'installation selon l'invention avec un four et trois bacs. Figures 4 and 5 show a second embodiment of the installation according to the invention with an oven and three trays. Le four 29 est similaire au four 1 de l'exemple précédent avec les mêmes éléments tels que chambre de chauffe, turbine, bouchon 4 qui supporte la charge 5. Le système de la table supérieure fixe 12 et son support 14 sont également les mêmes que dans l'exemple précédent, tandis que la table rotative 30 est agencée pour porter trois bacs et comprend trois garnitures de joints intérieurs 31, 32 et 33. Le joint extérieur 16 est similaire à celui de l'exécution décrite plus haut ainsi que la porte 27 avec son joint 28. The oven 29 is similar to the oven 1 of the above example with the same elements such as heating chamber, turbine, plug 4 is borne 5. The system of the stationary upper table 12 and its support 14 are also the same as in the previous example, while the rotary table 30 is arranged to carry three containers and three trim inner seals 31, 32 and 33. the outer seal 16 is similar to the embodiment described above as well as the door 27 with its seal 28.

Le premier bac est une chambre de chargement 34, similaire à la chambre 6, le deuxième bac est une chambre de refroidissement sous gaz 35 et le troisième bac est une chambre de refroidissement avec un liquide 36, par exemple de l'huile 37. La chambre de chargement et la chambre de refroidissement sous gaz comprennent des turbines 38 et 39 tandis que la chambre à refroidissement à l'huile comprend une pompe à huile 40 pour la circulation de l'huile. The first tank is a loading chamber 34, similar to the chamber 6, the second container is a gas cooling chamber 35 and the third container is a cooling chamber with a liquid 36, for example oil 37. The loading chamber and the gas-cooling chamber comprise turbines 38 and 39 while the oil cooling chamber comprises an oil pump 40 for circulating oil. Cette installation comprend aussi une pompe à vide avec des vannes pour pouvoir évacuer les chambres de chargement et de refroidissement sous gaz, ainsi que des amenées de gaz pour les chambres et pour le four. This installation also includes a vacuum pump with valves to evacuate the loading chambers and cooling in gas, and the gas fed to the chambers and the furnace. Chaque chambre comprend en outre un piston élévateur 41, resp. Each chamber further comprises a reciprocating piston 41, resp. 42, resp. 42, resp. 43. 43.

Un exemple de cycle de travail avec cette installation est décrit à l'aide des figures 6A à 6K. An example of working cycle with this installation is described with the aid of Figures 6A-6K. La figure 6A montre la préparation de la charge 5 en-dessus de la chambre de chargement 34 avec la porte 27 ouverte. Figure 6A shows the preparation of the filler 5 in above the loading chamber 34 with the door 27 open. La figure 6B montre le conditionnement de la charge, éventuellement par le vide, avec la porte 27 fermée et la figure C montre la situation après la rotation des chambres avec une course de 120 ° pour amener la charge 5 sous le four. Figure 6B shows the packaging of the load, possibly empty, with the door 27 closed, and Figure C shows the situation after rotation of the rooms with a stroke of 120 ° to bring the load 5 in the oven. Selon la figure D, la charge est introduite dans le four et le cycle de traitement dans le four commence. According to the figure D, the filler is introduced into the furnace and the processing cycle in the furnace begins. Selon la figure E, les bouchons sont mis à niveau avec la table rotative après le traitement thermique pour effectuer une rotation montrée à la figure F. Pendant cette rotation, la charge glisse sur la table et après, la chambre à huile se trouve sous la charge, c'est-à-dire sous le four. According to Figure E, the caps are upgraded with the rotary table after the heat treatment to rotate shown in Figure F. During this rotation, the load slides on the table and after the oil chamber is under the load, that is to say in the oven. La figure G montre la descente de la charge et le refroidissement immédiat de celle-ci dans l'huile. Figure G shows the lowering of the load and the immediate cooling of it in oil. Dans la figure H on voit la préparation de la deuxième charge 5A, celle-ci étant éventuellement conditionnée par le vide, ainsi que le refroidissement de la première charge 5 dans l'huile. In Figure H we see the preparation of the second load 5A, the latter being optionally conditioned by the vacuum and cooling the first load 5 in the oil. La figure I montre une nouvelle rotation des chambres pour amener la deuxième charge 5A sous le four avant de l'y introduire. Figure I shows a further rotation of the rooms to cause the second load 5A under the furnace before introducing it. La figure 6K enfin montre la situation où le cycle de traitement est effectué pour la deuxième charge 5A tandis que la première charge 5 est évacuée, pour revenir à la situation de la figure 6E. Figure 6K finally shows the situation where treatment cycle is performed for the second load 5A while the first load 5 is released to return to the position of Figure 6E.

La figure 7 montre un troisième exemple d'exécution d'une installation selon l'invention avec un four à vide 44 à paroi chaude avec un chauffage graphite 45, une isolation 46, une turbine de circulation 3 pour les basses températures de traitement et les bouchons 49, 49A supportant la charge 5. Le système de table fixe supérieure 12 avec sa porte 27 et joint 28, la table rotative 13 entraínée par le moteur 15 et les deux systèmes de joints avec joint extérieur 16 et joints intérieurs 17 et 18, est le même qu'auparavant. Figure 7 shows a third exemplary embodiment of an installation according to the invention with a vacuum oven 44 hot wall with a graphite heater 45, an insulation 46, a turbine 3 for circulation of the low processing temperatures and plugs 49, 49A supporting the load 5. the upper fixed table system 12 with its door 27 and seal 28, the rotary table 13 driven by the motor 15 and the two systems of joints with outer seal 16 and inner seals 17 and 18, is the same as before. Les bacs suspendus à la table rotative sont deux chambres de chargement et déchargement 47 et 48 avec refroidisseur incorporé, comprenant les deux turbines 19 et 20 selon la première forme d'exécution. Trays suspended from the rotary table are two loading and unloading chambers 47 and 48 with built-in cooler, comprising the two turbines 19 and 20 according to the first embodiment.

Les figures 8A à 8L illustrant un exemple de cycle de travail effectué par l'installation de la figure 7. La figure 8A montre la préparation de la charge 5 avec la porte ouverte et la figure 8B montre le conditionnement de la charge par le vide. 8A to 8L illustrating an example of working cycle carried out by the installation of Figure 7. Figure 8A shows the preparation of the load 5 with the door open and Figure 8B shows the packaging of the load by the vacuum. La figure C montre la descente du bouchon 49 et l'ouverture du four suivie de la rotation des chambres selon la figure D en vue d'amener la charge 5 sous le four. Figure C shows the descent of the plug 49 and the opening of the furnace followed by the rotation of the chambers according to FIG D in order to bring the load 5 in the oven. La figure E montre l'introduction de la charge dans le four initiant le cycle de traitement. Figure E shows the introduction of the charge in the furnace initiating the processing cycle. Pendant ce temps, selon la figure F, la deuxième charge 5A est préparée et conditionnée par le vide selon la figure G. La figure H montre l'ouverture du four et la descente de la première charge suivie d'une rotation des chambres avec refroidissement immédiat de la première charge dans la chambre de refroidissement 47 (figure I) et ensuite, à la figure K, l'introduction de la deuxième charge 5A dans le four pour le cycle de traitement, tandis que la première charge est toujours encore refroidie. Meanwhile, according to Figure F, the second load 5A is prepared and packaged by the blank according to Figure G. Figure H shows the opening of the furnace and the descent of the first charge followed by a rotation rooms with cooling the spot of the first charge in the cooling chamber 47 (Figure I) and then, to FIG K, the introduction of the second load 5A in the furnace for the processing cycle, while the first charge is still further cooled. La figure 8L montre que, tandis que la deuxième charge est en cours de traitement, la première charge est évacuée et la troisième charge 5B est amendée sur le bouchon, pour être ensuite conditionnée et traitée. Figure 8L shows that, while the second load is being processed, the first charge is discharged and the third load 5B is amended on the cap, to be subsequently packaged and processed.

Le même cycle de traitement peut s'appliquer à une installation où, comme variante d'exécution, le four à vide possède une paroi froide et une isolation en graphite. The same treatment cycle can be applied to an installation in which, as an alternative embodiment, the vacuum furnace has a cold surface and a graphite insulation.

La figure 9 montre une variante de l'installation selon la figure 7 avec un four 50 similaire au four précédent mais possédant en outre quatre arrêts mécaniques 51 avec leur commandes 52 pour retenir ou libérer la charge 5A, comme cela ressortira du descriptif selon les figures 10A à 10L. Figure 9 shows a variant of the installation according to Figure 7 with an oven 50 similar to the previous furnace, but further having four mechanical stops 51 with their controls 52 for retaining or releasing the load 5A, as will be apparent from description of FIGS 10A to 10L. La table fixe supérieure 12 est similaire au cas précédent avec la porte 27 et ses joints 28 ainsi que le support de la table 14. Entre la table fixe 12 et la table rotative 13 se trouve le même système de joints que décrits auparavant et la table rotative est entraínée par le moteur 15. A la table rotative sont suspendue au moins une chambre à huile 53 avec son système de pompe 40 et au moins un bac de refroidissement à gaz 54 avec la turbine 20. The upper fixed table 12 is similar to the previous case with the door 27 and seals 28 and the table support 14. Between the fixed table 12 and the rotary table 13 is the same system boundaries as described previously and the table is rotatably driven by the motor 15. a rotary table are suspended at least one oil chamber 53 with the pump system 40 and at least one gas cooling tank 54 with the turbine 20.

Le bac 54 est une chambre à pression et c'est pourquoi que le piston ascenseur prévu pour les autres bacs est ici remplacé par un ascenseur 55 comprenant un support de charge 56, lié à une colonne portante 57 avec une vis 58 qui est mise en rotation par un moteur 59 avec transmission par chaíne, pour faire monter ou descendre l'ascenseur. Tray 54 is a pressure chamber and that is why the lift piston provided for the other trays is here replaced by an elevator 55 comprising a load carrier 56, bonded to a supporting column 57 with a screw 58 which is carried rotation by a motor 59 with chain drive, to raise or lower the elevator. Tout le dispositif de l'ascenseur se trouve dans l'enceinte de la chambre à pression. All lift the device is in the walls of the pressure chamber. Vers le haut, la chambre sous pression est fermée par une porte inférieure 60, des joints 61 assurant l'étanchéité. Upward, the pressure chamber is closed by a lower door 60, seals 61 sealing. Le chargement et déchargement des pièces peut se faire par cette chambre à pression, ou alors l'installation comprend, en plus de cette chambre à pression et de la chambre à huile, une chambre de chargement décrite dans les exemples précédents. The loading and unloading of the parts can be done by this pressure chamber, or while the installation comprises, in addition to the pressure chamber and the oil chamber, a charging chamber described in the preceding examples.

Les figures 10A à 10L montrent schématiquement un cycle de traitement possible avec l'installation de la figure 9. La figure 10A montre la préparation de la charge 5, toujours avec la porte ouverte, et la figure 10B le conditionnement de la charge par le vide, avec la porte 27 fermée, suivi de la rotation des chambres pour mettre la charge sous le four (figure 10C). Figures 10A-10L illustrate schematically a possible treatment cycle with the installation of Figure 9. Figure 10A shows the preparation of the load 5, still with the door open, and FIG 10B conditioning load by vacuum , with the door 27 closed, followed by rotation of the rooms to bring the charge in the furnace (FIG 10C). Ensuite, selon la figure D, la charge est introduite dans le four pour entamer le cycle de traitement et, en fin de cycle à la figure E, la charge est descendue et les crochets 51 sont fermés pour la retenir pendant la descente du bouchon par l'ascenseur 55. Ensuite, selon F, les chambres sont mises en rotation pour amener la chambre à huile sous le four et, selon G, le support de charge est monté et les crochets sont ouverts. Then, according to the figure D, the filler is introduced into the furnace to begin the treatment cycle and in the final cycle in Figure E, the load is lowered and the hooks 51 are closed to retain it during the descent of the cap by the elevator 55. Then, according to F, B are rotated to cause the oil chamber in the furnace and, as G, the load carrier is mounted and the hooks are open. La charge sur le support de charge est descendue pour être immergée dans l'huile (figure H) pour un refroidissement immédiat, intensifié par un canal de flux forcé dans la chambre à huile. The load on the load support is lowered to be immersed in oil (Figure H) for immediate cooling, intensified by a flow channel forced into the oil chamber. Selon la figure I, la deuxième charge 5A est préparée et conditionnée par le vide, puis mise en rotation selon la figure K pour l'amener sous le four pour un cycle de traitement selon la figure L, tandis que la première charge est évacuée après égouttage pour enchaíner un nouveau cycle à partir de la situation représentée à la figure D. According to FIG I, the second load 5A is prepared and packaged by vacuum, and then rotated according to Fig K to bring it under the furnace to a processing cycle according to Fig L, while the first charge is removed after draining to chain a new cycle starting from the situation shown in Figure D.

La figure 11 montre une autre forme d'exécution d'une l'installation selon l'invention avec un four 62 similaire au four 29 de la figure 4, mais comportant en plus deux demi-tiroirs 63 et 63A, formant le bouchon, qui sont commandés par des éléments mécaniques 64. Le tout est fixé sur la table fixe supérieure 12 qui est similaire à celle des exécutions précédentes et attachés aux supports 14. Sous la table fixe se trouve une table rotative similaire à celle des exécutions précédentes, avec les deux systèmes de joints extérieurs et intérieurs. Figure 11 shows another embodiment of an installation according to the invention with an oven 62 similar to furnace 29 of Figure 4, but additionally having two half-trays 63 and 63A, forming the cap, which are controlled by mechanical components 64. the whole is fixed to the upper fixed table 12 which is similar to previous runs and attached to the supports 14. Under the fixed table is a rotary table similar to that of the preceding embodiments, with two systems of external and internal joints. Les bacs, c'est-à-dire la chambre à huile et la ou les chambre(s) de refroidissement, sont les mêmes que dans l'exécution selon la figure 4. Bins, that is to say the oil chamber and the room (s), cooling, are the same as in the embodiment according to Figure 4.

Les figures 12A à 12P montrent un cycle de travail avec l'installation selon la figure 11 et feront mieux comprendre le rôle des deux demi-tiroirs 63, 63A. 12A to 12P show a working cycle with the installation according to Figure 11 and will better understand the role of the two half-trays 63, 63A. La figure 12 A montre la préparation de la charge 5, la figure B son conditionnement par le vide, et la figure C la rotation des chambres pour placer ladite charge sous le four. Figure 12 A shows the preparation of the load 5, the figure B its packaging by the vacuum, and Figure C the rotation rooms for placing said charge in the furnace. Ensuite, selon D, les demi-tiroirs sont déplacés pour ouvrir le four, avant que la charge est introduite dans ce dernier et que les demi-tiroirs sont légèrement refermés, comme cela ressort de la figure E. A la figure F le support de charge 56 est descendu pour déposer la charge sur le bouchon 63, 63A. Then, according to D, the half-trays are moved to open the oven, before the feed is introduced into the latter and that the half-trays are slightly closed, as is apparent from FIG E. In Fig F the support load 56 is lowered to deposit the load on the plug 63, 63A. Selon G, le four est fermé et le cycle de traitement commence. According to G, the oven is closed and the processing cycle begins. Pendant ce temps, les chambres sont mises en rotation et le bac d'huile est amené sous le four et simultanément selon I la deuxième charge 5A est préparée et conditionnée par le vide. Meanwhile, B are rotated and the oil tray is brought under the furnace and simultaneously in the I second load 5A is prepared and packaged by vacuum. Dans la figure K une préouverture du bouchon, c'est-à-dire des demi-tiroirs est effectuée, et le support de charge est déplacé vers le haut. In Figure K is a pre-opening of the cap, that is to say the half-trays is performed, and the load carrier is moved upwardly. Selon la figure L le four est complètement ouvert et à la figure M, la charge est immergée et refroidie immédiatement dans la chambre à huile avec canal de flux forcé. According to FIG The oven is fully open and Figure H, the charge is cooled and immersed immediately in the oil chamber with forced flow channel. Ensuite, selon la figure N, les chambres sont de nouveau mises en rotation, et la deuxième charge 5A se trouve sous le four. Then, according to figure N, the rooms are again rotated, and the second charge 5A is under the oven. Dans la figure O, on introduit la charge 5A dans le four selon les figures C à G, le cycle de traitement dans le four commence, tandis qu'après égouttage, la première charge 5 est évacuée. In Fig O are introduced load 5A in the oven according to Figs C to G, the processing cycle in the furnace begins, while after draining, the first charge 5 is discharged. Enfin, selon la figure P, les chambres sont mises en rotation pour emmener le bac à huile sous le four tandis qu'une nouvelle charge 5B est préparée pour subir le cycle selon les figures 12A et suivantes. Finally, according to FIG P, B are rotated to take the oil pan under the furnace while a new load 5B is prepared to undergo the cycle according 12A and the following figures.

Dans cette forme d'exécution, on observe que le bouchon qui présente la forme de deux demi-tiroirs 63 et 63A n'est pas déplacé verticalement, comme dans les premières exécutions, mais est tiré ou poussé horizontalement. In this embodiment, there is the cap which has the shape of two half-trays 63 and 63A is not moved vertically, as in the first executions, but is pulled or pushed horizontally.

Les figures 13 et 14 montrent schématiquement une variante d'exécution avec, par exemple un four et quatre bacs suspendus à la table rotative. Figures 13 and 14 schematically show a variant with, e.g., a furnace, and four trays suspended from the rotary table. Le four peut être du genre de l'un des fours décrits auparavant, tandis que deux bacs sont prévus pour le chargement/déchargement et deux bacs pour le refroidissement, soit par gaz, soit par liquide, par exemple l'huile. The furnace may be of the kind of one of the ovens described above, while two trays are provided for loading / unloading and two trays for cooling either by gas or liquid, for example oil. Toutes combinaisons sont possibles, c'est-à-dire que le nombre et le genre de fours, ni le nombre et le genre de bacs est en principe limité dans une installation selon l'invention. All combinations are possible, that is to say, the number and types of ovens or the number and type of containers is in principle limited to a plant of the invention.

Les exécutions divulguées dans les figures 1 à 14 sont des installations avec une table fixe et une table rotative comprenant des joints. Executions disclosed in Figures 1 to 14 are installations with a fixed table and a rotary table comprising joints. Préférentiellement, le ou les fours sont solidaires de la table fixe et les bacs suspendus reliés à la table rotative. Preferably, the or ovens are integral with the fixed table and the suspended trays connected to the rotary table. Mais un montage inverse, c'est-à-dire selon lequel le ou les fours sont solidaires de la table rotative et où les bacs sont suspendus à une table fixe, est également envisageable. But a reverse mounting, that is to say wherein the or ovens are integral with the rotary table and wherein the tanks are suspended to a fixed table, is also conceivable. Dans toutes ces solutions ou arrangements, l'étanchéité entre la table fixe et la table rotative est assurée par un joint extérieur gonflable et des joints, selon le nombre de bacs, intérieurs gonflables, le tout assurant une étanchéité parfaite de sorte à permettre un traitement de pièces, d'une part, sans oxydation de surface et sans pollution des gaz de traitement du four ou sans pollution du vide du four et, d'autre part, sans refroidissement du four pendant les opérations. In all these solutions or arrangements, sealing between the fixed table and the rotary table is ensured by an inflatable outer seal and gaskets, as the number of bins, inflatable interiors, while ensuring a perfect seal so as to allow treatment parts, one part, without surface oxidation and without pollution of the baking gases or vacuum without pollution of the furnace and, on the other hand, without cooling the furnace during operation.

Cette conception de déplacement relatif entre four(s) et bac(s), le tout sous une étanchéité parfaite. This displacement between design on the oven (s) and tray (s), all under a perfect seal. n'est pas nécessairement giratoire et limitée à une table rotative, mais peut être appliquée à un système de déplacement linéaire. is not necessarily limited to and rotating a rotary table, but can be applied to a linear displacement system. Les figures 15 à 21 montrent deux exemples d'exécution de fours et bacs à déplacement relatif linéaire. Figures 15 to 21 show two exemplary embodiments of ovens and trays relative linear displacement.

Les figures 15 à 17 montrent une première forme d'exécution d'une telle installation à déplacement linéaire avec un four et deux bacs. Figures 15 to 17 show a first embodiment of such a linear displacement system with an oven and both trays. Le four correspond au four 1 de l'exécution selon la figure 1, avec les mêmes éléments, tels que chambre de chauffe, turbine et bouchon, ce four étant fixé sur une table supérieure 65 supportée par un support 66. Analogue à l'exécution rotative une table de translation 67 se trouve en dessous de la table supérieure, la table de translation portant deux bacs 68 et 69 agencés en chambres de chargement et de refroidissement et pourvu, chacun, d'un piston élévateur 8 et 9 et d'amenée de gaz et reliés à une pompe à vide pour évacuer les chambres. The furnace corresponds to the furnace 1 of the embodiment according to Figure 1, with the same elements, such as heating chamber, turbine and cap, this oven being fixed on an upper table 65 supported by a support 66. Similar to the execution rotating a translation table 67 is located below the upper table, the translation table carrying two trays 68 and 69 arranged in loading and cooling chambers and provided, each, of a reciprocating piston 8 and 9 and supply gas and connected to a vacuum pump to evacuate the chambers. Pour assurer l ' étanchéité, un joint extérieur 70 et deux joints intérieurs 71 et 72 sont prévus, ces joints étant gonflables comme les autres joints évoqués précédemment. To ensure sealing, an outer seal 70 and two inner rings 71 and 72 are provided, these seals being inflatable seals like the others discussed above.

Le fonctionnement de cette installation est analogue au fonctionnement des installations de type rotatif et les mêmes cycles de travail peuvent être appliqués pour le fonctionnement d'une installation de type linéaire que pour une installation de type rotatif, et il suffit de remplacer le terme "rotation" par "déplacement linéaire". The operation of this plant is similar to the operation of the rotary-type facilities and the same work cycles can be applied to the operation of a linear system for a rotary type installation, and simply replace the term "rotation "with" linear displacement ". Il est aussi entendu qu'au lieu de l'installation montrée aux figures 15 à 17, les installations décrites dans les exemples précédents sont applicables analogiquement. It is also understood that instead of the installation shown in Figures 15 to 17, the facilities described in the examples above are applicable by analogy.

La solution linéaire exige, comme montré à la figure 16, deux portes étanches de chargement 73 et 74. The linear solution requires, as shown in Figure 16, two sealed loading doors 73 and 74.

Les figures 18 à 21 montrent une installation à four poussant à charge longue. Figures 18 to 21 show a kiln installation pushing long load. La charge peut être par exemple une charge composée de tubes de 6 m de long, à recuire sous vide ou sous atmosphère, et il est évident que la réduction importante de la longueur totale d'une telle installation où le four doit avoir la même longueur, présente un avantage considérable. The filler may be for example a charge composed of pipes 6 m long, annealing under vacuum or atmosphere, and it is clear that the significant reduction of the total length of such a plant where the furnace must have the same length presents a considerable advantage.

Le four 75 du type poussant à charge longue est connu en soi et comprend un canal ou une carcasse étanche 76 et une chambre chauffante 77 ainsi qu'une turbine de circulation des atmosphère 78 et une amenée de gaz 79, le tout étant agencé dans une enceinte 80. Chacune des deux chambres de chargement/déchargement 81, 82 est munie d'un refroidisseur 83 et d'une turbine 84 de circulation des gaz. The furnace 75 of the type long pushing load is known per se and comprises a channel or a sealed casing 76 and a heating chamber 77 and a turbine flow of air 78 and a gas supply 79, the whole being arranged in a chamber 80. Each chamber loading / unloading 81, 82 is provided with a cooler 83 and a turbine 84 of gas flow. L'installation comprend en outre une platine fixe 85 solidaire du four et équipée de deux portes 86 de chargement ou déchargement de paniers ou autres objets, tels que tubes. The installation further comprises a fixed plate 85 secured to the furnace and provided with two doors 86 for loading or unloading of baskets or other objects, such as tubes. Ces portes sont munies de joints d'étanchéité. These doors have seals. Les chambres de chargement ou déchargement sont solidaires d'une platine mobile 87 montée sur glissière. The loading and unloading chambers are secured to a movable platen 87 mounted on slide. L'étanchéité est assurée par un joint 88 autour de chaque chambre de chargement, ces joints étant gonflables comme les joints précédents. Sealing is ensured by a seal 88 around each loading chamber, these seals being inflatable seals as previous. Chaque chambre de chargement ou déchargement comprend un système d'entraínement 89 permettant l'introduction et l'extraction de la charge 90 dans le canal de refroidissement et dans le four. Each unloading or loading chamber comprises a driving system 89 for the introduction and extraction of the charge 90 into the cooling channel and in the furnace. En outre, une pompe à vide permet d'extraire de la chambre en position de chargement ou déchargement les gaz ou l'oxygène. In addition, a vacuum pump is used to extract from the chamber in the loading position or unloading the gas or oxygen. De cette façon, aucune trace d'oxydation ou de pollution de l'atmosphère est possible. This way, no trace of oxidation or atmospheric pollution is possible.

La disposition des éléments de l'installation permet de réduire d'une ou de deux longueurs de charge l'encombrement de l'installation et surtout, de ne pas immobiliser la chambre de chargement durant le refroidissement de la charge. The arrangement of the elements of the installation can reduce one or two lengths of the load space of the installation and especially not immobilize the loading chamber during the cooling of the load. Ceci ressort clairement si l'on compare cette installation selon l'invention avec les installations connues jusqu'à présent et vendues par différentes maisons. This is clear if we compare the installation of the invention with the known plants far and sold by various houses.

Claims (14)

  1. Installation for the thermal treatment of a batch of metallic pieces, comprising a first assembly with at least one furnace and a second assembly with at least one tank, one assembly being displaceable with respect to the other and at least one joint arranged between the two assemblies, one of the two assemblies being fixed to a stationary structure (12; 65, 85) and the other assembly being connected to a structure (13, 30; 67, 87) that is displaceable with respect to the stationary structure, the structure comprising at least one tank (6, 7; 34, 35, 36; 47, 48; 68, 69; 81, 82) being provided at the location of each tank with an internal joint (17, 18; 31, 32, 33; 71, 72; 88A, 88B) around the tank, and a continuous external joint (16, 70, 88C) being disposed between the two structures in an area near the periphery of the structures, the external and internal joints allowing to selectively place one of the tanks (6, 7; 34, 35, 36; 47, 48; 68, 69; 81, 82) in front of one of the furnaces (17, 18; 31, 32, 33; 70, 71, 72; 75) while ensuring a double sealing action and avoiding the surface oxidation of the pieces of the charge (5, 5A, 5B), the pollution, and the cooling of the furnace during the working cycle.
  2. Installation according to claim 1, characterised in that the internal joint (17, 18; 31, 32, 33; 71, 72; 88A, 88B) around each tank and/or the external joint (16, 70, 88C) is (are) inflatable.
  3. Installation according to claim 1 or 2, characterised in that the furnace(s) (17, 18; 31, 32, 33; 70, 71, 72; 88) is (are) fixed to the stationary structure and in that the tanks (6, 7; 34, 35, 36; 47, 48; 68, 69; 81, 82) are fixed to the displaceable structure.
  4. Installation according to claim 3, characterised in that the stationary structure is a table (12) carrying the furnace(s) (1, 29, 44, 50) and fixed to a support (14) and the displaceable structure is a rotatable table (13) carrying the tanks (6, 7; 34, 35, 36; 47, 48).
  5. Installation according to claim 3, characterised in that the stationary structure is a fixed table (65) carrying the furnace(s) (17, 18; 31, 32, 33; 70, 71, 72; 88) and the displaceable structure is a linearly translating table (67) carrying the tanks (68, 69).
  6. Installation according to claim 4, characterised in that the fixed table (12) comprises a door (27) with a joint (28) for loading/unloading the charge (5, 5A, 5B).
  7. Installation according to claim 4 or 6, characterised in that the tanks (6, 7; 34, 35, 36; 47, 48) are suspended to the rotatable table (13), and in that each tank comprises a lifting piston (8, 9; 41, 42, 43) for moving the charge (5, 5A, 5B), the plug (4, 4A) of the furnace forming the charge support.
  8. Installation according to one of claims 1 to 4 or 6, characterised in that the at least one tank is a tank containing a cooling liquid (53), and in that another tank is a pressure tank (54) comprising an elevator (55) provided with a charge support (56) and a tight lower door (64).
  9. Installation according to claim 8, characterised in that the furnace (50) is provided with mechanical stops (51) for locking the charge (5) during the rotation of the rotatable table (13).
  10. Installation according to one of claims 1 to 4, 6, or 7, characterised in that the furnace (1, 29, 44) is provided with a plug constituted of two half-slides (63, 63A) effecting a horizontal movement.
  11. Installation according to one of claims 1 to 4 and 6 to 10, characterised in that the second assembly comprises at least one loading/unloading tank (6; 34; 47, 48), a gas cooling tank (35, 54), and a cooling tank (36, 53) using a liquid.
  12. Installation according to claim 5, characterised in that the furnace(s) (64) is (are) fixed to an upper table (65) and the tanks are suspended to a translating table (67), the upper table comprising a door (73, 74) on both sides of the furnace.
  13. Installation according to claim 5, characterised in that the furnace is a long charge pusher type furnace (75) comprising a mill bar (85) equipped with two loading/unloading doors (86), and in that two loading/unloading chambers (81, 82) are attached to a moving mill bar (87) mounted on rails, each chamber comprising a sealing joint (88).
  14. Installation according to claim 13, characterised in that each chamber (81, 82) comprises a driving system (89) for the charge (90).
EP19980811062 1998-10-23 1998-10-23 Heat treatment installation for a batch of metallic workpieces Expired - Fee Related EP0995805B9 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19980811062 EP0995805B9 (en) 1998-10-23 1998-10-23 Heat treatment installation for a batch of metallic workpieces

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ES98811062T ES2199416T3 (en) 1998-10-23 1998-10-23 Installation for the thermal treatment of a load of metal parts.
DE1998615108 DE69815108T2 (en) 1998-10-23 1998-10-23 A thermal processing apparatus for a batch of metallic workpieces
EP19980811062 EP0995805B9 (en) 1998-10-23 1998-10-23 Heat treatment installation for a batch of metallic workpieces
DE1998615108 DE69815108D1 (en) 1998-10-23 1998-10-23 A thermal processing apparatus for a batch of metallic workpieces

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EP0995805B1 (en) 2003-05-28 grant
DE69815108T2 (en) 2004-02-05 grant
ES2199416T3 (en) 2004-02-16 grant
DE69815108D1 (en) 2003-07-03 grant
EP0995805A1 (en) 2000-04-26 application

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