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EP0735149B1 - Dispositif pour le traitement thermique d'articles métalliques sous vide - Google Patents

Dispositif pour le traitement thermique d'articles métalliques sous vide Download PDF

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Publication number
EP0735149B1
EP0735149B1 EP96101733A EP96101733A EP0735149B1 EP 0735149 B1 EP0735149 B1 EP 0735149B1 EP 96101733 A EP96101733 A EP 96101733A EP 96101733 A EP96101733 A EP 96101733A EP 0735149 B1 EP0735149 B1 EP 0735149B1
Authority
EP
European Patent Office
Prior art keywords
chamber
kiln
furnace
constructed
batches
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96101733A
Other languages
German (de)
English (en)
Other versions
EP0735149A1 (fr
Inventor
Bernd Dr. Edenhofer
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.)
Ipsen International GmbH
Original Assignee
Ipsen International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ipsen International GmbH filed Critical Ipsen International GmbH
Publication of EP0735149A1 publication Critical patent/EP0735149A1/fr
Application granted granted Critical
Publication of EP0735149B1 publication Critical patent/EP0735149B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C21D9/0037—Rotary furnaces with vertical axis; Furnaces with rotating floor
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
    • 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
    • F27B9/16—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 circular or arcuate path
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0059—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising tracks, e.g. rails and wagon
    • 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
    • F27D2099/0078—Means to minimize the leakage of the furnace atmosphere during charging or discharging
    • F27D2099/008—Using an air-lock
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/04—Ram or pusher apparatus

Definitions

  • the invention relates to a device for heat treatment of metallic Workpieces under vacuum with a rotary cycle furnace with an annular Turntable and a feed lock and an output lock, the Work piece batches using the turntable to different Machining positions are movable.
  • Such a device in which the workpieces to be treated by means of a Rotary plates can be fed to different processing positions known for example from DE-PS 40 05 956.
  • this device is the turntable arranged in a vacuum chamber through partitions in different rooms divided so that different treatments different processing positions are possible.
  • To be treated the workpiece batches arranged in the separated rooms different processing positions within the vacuum chamber supplied on which the workpieces undergo various plasma treatments and / or can be subjected to heat treatments.
  • the object of the invention is to create a device for the heat treatment of metallic workpieces under vacuum, which allows a flexible change between different batches with different case hardening depths, without the change in carburizing conditions affecting the other batches.
  • the technical solution to this problem by the invention is characterized in that the rotary cycle furnace is designed as a vacuum ring furnace for the diffusion phase and that at least one separate carburizing furnace chamber is arranged along the circumference and outside of the rotary cycle furnace at least between the feed lock and the output lock, into which the workpiece batches for a carburizing treatment can be introduced.
  • the main advantage of such an embodiment according to the invention is that the rotary cycle oven is used only for diffusion and the workpiece batches for the carburizing phases in the separately arranged individual carburizing chambers are insertable. After a carburizing phase, the batch of workpieces becomes diffusion Move back into the rotary cycle oven until it is ready for another Phase of the carburizing process is again brought into a carburizing furnace chamber or but after completing the carburizing process via the output lock can be removed from the rotary cycle oven.
  • the carburizing furnace chambers can in a rotary cycle furnace according to the invention as plasma furnaces or Vacuum furnaces should be designed.
  • Preheating the feed lock to the treatment temperature is according to one advantageous further development of the invention between the feed lock and the rotary cycle oven switched at least one heating chamber. Since the Heating the workpiece batches from the outside, it can in particular be advantageous for solid workpieces that between the Heating chamber and the rotary cycle oven a temperature compensation chamber is interposed in which there is a uniform temperature distribution in can set the workpiece batch.
  • the Compensation chamber as a hydrogen sputtering chamber for surface cleaning of the workpieces.
  • a cleaning of the Workpiece surfaces using a hydrogen plasma is particularly then advantageous if the at least one arranged on the rotary cycle furnace Carburizing furnace chamber is designed as a plasma furnace.
  • the delivery lock is as Cooling chamber trained.
  • the direct design of the delivery lock as The cooling chamber enables a particularly space-saving and compact design the plant.
  • the Cooling chamber designed as a gas quenching chamber or with a Liquid quenching bath.
  • a hardening furnace can be interposed, in which the batch first on the Hardening temperature is cooled before it is then in the cooling chamber is deterred.
  • Carburizing furnace chamber assigned two thrust devices, either can be operated electrically, pneumatically or hydraulically.
  • the device for heat treatment of metallic shown in Fig. 1 Workpieces in batches 1 exist in the direction of the transport route Batches 1 from a feed lock 2, a heating chamber 3, one Compensation chamber 4, a rotary cycle oven 5 as a diffusion oven, two Carburizing furnace chambers 6 and an output lock 7.
  • the feed lock 2 is removed from a batch store (not shown) via a transport device 8 with the workpiece batches to be treated loaded. After loading the feed lock 2 doors 2a and 2b the feed lock 2 is closed and the feed lock 2 via a Pump not shown evacuated because the subsequent treatment of the Batches 1 in the chambers 3 and 4 and the rotary cycle oven 5 under vacuum he follows. Then door 2b is opened, batch 1 by means of a Shock device 2c transported into the heating chamber 3 and the door 2b again locked.
  • the Charge 1 by means of heaters, not shown, except for the Treatment temperature heated, d. H. up to the temperature, which is also in the Rotary cycle furnace 5 prevails.
  • the heating chamber 3 is followed by the compensation chamber 4, wherein a door 3a between the heating chamber 3 and the compensation chamber 4 is arranged and the transport of the batch 1 within the heating chamber 3rd via an impact device 3c and the transport from the heating chamber 3 in the compensation chamber 4 takes place via an impact device 3b.
  • a door 3a between the heating chamber 3 and the compensation chamber 4 is arranged and the transport of the batch 1 within the heating chamber 3rd via an impact device 3c and the transport from the heating chamber 3 in the compensation chamber 4 takes place via an impact device 3b.
  • the heating of the batches 1 in the heating chamber 3 by means of Heating only from the outside via radiation in particular massive workpieces still have no even temperature distribution when the surface has already reached the treatment temperature and therefore the Charge 1 is removed from the heating chamber 3 in order not to carry the workpiece too high a temperature.
  • the compensation chamber 4 the is also equipped with heaters, not shown, can Compensate the temperature in the workpiece.
  • the temperature in the Compensation chamber 4 regulated so that it is always on a constant Temperature, namely the desired treatment temperature is maintained.
  • the usual treatment temperatures are between 800 ° C and 1000 ° C.
  • the batch 1 After reaching the treatment temperature, the batch 1 after the Opening a door 4a in the rotary cycle oven 5 by means of a pushing device 4b pushed and the door 4a closed again.
  • the batch 1 is a direct way the carburizing furnace chambers 6 transported.
  • the chambers 6 are before the insertion of a batch 1 by means of a pump, not shown evacuated.
  • a furnace chamber door 6a is opened and on the inside of the rotary cycle furnace arranged shock device 6b Charge 1 pushed into the carburizing furnace chamber 6 and the furnace chamber door 6a closed again.
  • the carburizing furnace chamber which either as Plasma oven or designed as a vacuum oven is the real one Carburization process completed.
  • the carburizing furnace is switched off again for the duration of the carburization and, if necessary, the Process gas removed from the carburizing furnace chamber 6.
  • the furnace chamber door 6a opened again and the batch 1 by means of one of the pushing device 6b opposite arranged shock device 6c back into the Rotary cycle oven 5 pushed.
  • the diffusion phase takes place during which the Edge carbon content drops again.
  • the described carburizing process and the diffusion phase repeated several times. Due to the structure of the device with the Rotary cycle furnace 5 for the diffusion phase and the outside Carburizing furnace chambers 6 for the actual carburizing process is one ensures optimal use of the device, since during an already Charge 1 treated in a carburizing furnace chamber 6 for the diffusion phase lingers in the rotary cycle oven 5, another batch 1 with possibly other ones Carburizing conditions are placed in the carburizing furnace chamber 6 can. Depending on how many carburizing furnace chambers 6 along the Scope of the rotary cycle oven 5 are arranged, the flexibility of this Device increased and the treatment time can be shortened.
  • the second embodiment of the device shown in FIG. 2 is up to the area of the delivery lock 7 is identical to the device according to FIG. 1 trained.
  • the Rotary cycle oven 5 and the output lock 7 designed as a cooling chamber Intermediate hardening furnace 9.
  • Such a hardening furnace 9 is necessary if the carburizing temperature in the carburizing furnace chambers 6 clearly above that Curing temperature of batch 1 is, and batch 1 after Carburizing process and before quenching to hardening temperature must be cooled.
  • batch 1 goes through after last diffusion phase in the rotary cycle furnace 5 first the hardening furnace 9, then in the cooling chamber of the delivery lock 7 to be quenched.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Furnace Details (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Tunnel Furnaces (AREA)

Claims (11)

  1. Dispositif destiné au traitement thermique de pièces métalliques sous vide, et comprenant un four à fonctionnement rotatif (5) à plateau annulaire tournant, ainsi qu'un sas de chargement (2) et un sas de déchargement (7), les charges de pièces (1) pouvant être déplacées vers différentes positions de travail à l'aide du plateau tournant,
       caractérisé en ce que
       le four à fonctionnement rotatif (5) est réalisé en tant que four à vide pour la phase de diffusion et en ce qu'il est prévu, le long de la périphérie et à l'extérieur du four à fonctionnement rotatif (5), au moins une chambre formant four de cémentation (6) située au moins entre le sas de chargement (2) et le sas de déchargement (7), et dans laquelle les charges de pièces (1) peuvent être introduites pour un traitement de cémentation.
  2. Dispositif selon la revendication 1, caractérisé en ce que ladite au moins une chambre formant four de cémentation (6) est réalisée en tant que four au plasma.
  3. Dispositif selon la revendication 1, caractérisé en ce que ladite au moins une chambre formant four de cémentation (6) est réalisée en tant que four à vide.
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce qu'au moins une chambre de chauffage (3) est disposée entre le sas de chargement (2) et le four à fonctionnement rotatif (5).
  5. Dispositif selon la revendication 4, caractérisé en ce qu'au moins une chambre d'égalisation (4) est disposée entre ladite au moins une chambre de chauffage (3) et le four à fonctionnement rotatif (5).
  6. Dispositif selon la revendication 5, caractérisé en ce que ladite au moins une chambre de chauffage (3) est réalisée en tant que chambre à projection d'hydrogène pour le nettoyage de surface des charges de pièces (1).
  7. Dispositif selon la revendication 1, caractérisé en ce que le sas de déchargement (7) est réalisé en tant que chambre de refroidissement.
  8. Dispositif selon la revendication 7, caractérisé en ce que la chambre de refroidissement est réalisée en tant que chambre de refroidissement brusque au gaz.
  9. Dispositif selon la revendication 7, caractérisé en ce que la chambre de refroidissement est équipée d'un bain de liquide.
  10. Dispositif selon la revendication 7, caractérisé en ce qu'un four de trempe (9) est intercalé le sas de déchargement (7), réalisé en tant que chambre de refroidissement, et le four à fonctionnement rotatif (5).
  11. Dispositif selon la revendication 1, caractérisé en ce que deux dispositifs de poussée (6b, 6c) sont associés à chaque chambre formant four de cémentation (6) afin de pouvoir déplacer, par une commande électrique, pneumatique ou hydraulique, les charges (1) depuis le four à fonctionnement rotatif (5) jusque dans la chambre formant four de cémentation (6) ou bien à partir de la chambre formant four de cémentation (6) pour les ramener dans le four à fonctionnement rotatif (5).
EP96101733A 1995-03-31 1996-02-07 Dispositif pour le traitement thermique d'articles métalliques sous vide Expired - Lifetime EP0735149B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29505496U 1995-03-31
DE29505496U DE29505496U1 (de) 1995-03-31 1995-03-31 Vorrichtung zur Wärmebehandlung metallischer Werkstücke unter Vakuum

Publications (2)

Publication Number Publication Date
EP0735149A1 EP0735149A1 (fr) 1996-10-02
EP0735149B1 true EP0735149B1 (fr) 1999-12-22

Family

ID=8006191

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96101733A Expired - Lifetime EP0735149B1 (fr) 1995-03-31 1996-02-07 Dispositif pour le traitement thermique d'articles métalliques sous vide

Country Status (7)

Country Link
US (1) US5722825A (fr)
EP (1) EP0735149B1 (fr)
JP (1) JPH08285462A (fr)
AT (1) ATE187985T1 (fr)
CA (1) CA2173058A1 (fr)
DE (2) DE29505496U1 (fr)
ES (1) ES2141401T3 (fr)

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JP3895000B2 (ja) * 1996-06-06 2007-03-22 Ｄｏｗａホールディングス株式会社 浸炭焼入焼戻方法及び装置
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DE19638106C1 (de) * 1996-08-30 1998-04-09 Franz Hillingrathner Rundtaktofen zum Behandeln von Werkstücken
DE19635257C1 (de) * 1996-08-30 1998-03-12 Franz Hillingrathner Rundtaktofen zum Behandeln von Werkstücken
DE59705105D1 (de) * 1996-08-30 2001-11-29 Franz Hillingrathner Rundtaktofen zum behandeln von werkstücken
AT404029B (de) * 1996-09-16 1998-07-27 Ald Aichelin Ges M B H Niederdruck-aufkohlungsanlage
GB9704229D0 (en) * 1997-02-28 1997-04-16 Mckechnie Plc Fastener installing machine
JPH1129821A (ja) * 1997-07-11 1999-02-02 Ntn Corp 浸炭焼入装置
DE19953654A1 (de) * 1999-11-08 2001-05-23 Pink Gmbh Vakuumtechnik Verfahren und Vorrichtung zur Herstellung einer Lotverbindung
JP4537522B2 (ja) * 2000-02-07 2010-09-01 中外炉工業株式会社 間欠駆動式真空浸炭炉
ATE335859T1 (de) * 2001-01-26 2006-09-15 Ipsen Int Gmbh Vorrichtung und verfahren zum transportieren metallischer werkstücke sowie anlage zur wärmebehandlung dieser werkstücke
JP5092170B2 (ja) * 2001-03-29 2012-12-05 Ｄｏｗａサーモテック株式会社 浸炭焼入れ方法及び浸炭焼入れ装置
JP5428031B2 (ja) * 2001-06-05 2014-02-26 Ｄｏｗａサーモテック株式会社 浸炭処理方法及びその装置
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JP5428032B2 (ja) * 2001-06-05 2014-02-26 Ｄｏｗａサーモテック株式会社 浸炭処理方法
EP1333105B1 (fr) * 2002-02-04 2008-04-02 Ipsen International GmbH Procédé pour le traitement thermique d'articles métalliques et article traité thermiquement
DE10310739A1 (de) * 2002-03-27 2003-10-09 Loi Thermprocess Gmbh Anlage zum Wärmebehandeln von Werkstücken
EP2324805B1 (fr) 2003-02-12 2013-11-13 The Procter & Gamble Company Partie centrale absorbante pour un article absorbant
US20050016831A1 (en) * 2003-07-24 2005-01-27 Paganessi Joseph E. Generation of acetylene for on-site use in carburization and other processes
US8684988B2 (en) * 2004-06-29 2014-04-01 The Procter & Gamble Company Disposable absorbent article having barrier cuff strips
US7598477B2 (en) * 2005-02-07 2009-10-06 Guy Smith Vacuum muffle quench furnace
US20090304907A1 (en) * 2008-06-09 2009-12-10 Applied Materials, Inc. Coating system and method for coating a substrate
EP2607504B1 (fr) * 2011-12-23 2018-02-28 Ipsen International GmbH Mécanisme de transport de charge pour système de traitement thermique multi station
DE102012019653A1 (de) * 2012-10-08 2014-04-10 Ipsen International Gmbh Gasdichter schutzgasbegaster Industrieofen, insbesondere Kammerofen, Durchstoßofen, Drehherdofen oder Ringherdofen
DE102013006589A1 (de) * 2013-04-17 2014-10-23 Ald Vacuum Technologies Gmbh Verfahren und Vorrichtung für das thermochemische Härten von Werkstücken
CN103276165B (zh) * 2013-06-07 2016-09-07 鞍钢股份有限公司 一种环形炉节能操作方法
PL228603B1 (pl) 2015-02-04 2018-04-30 Seco/Warwick Spolka Akcyjna Piec wielokomorowy do nawęglania próżniowego i hartowania kół zębatych, wałków, pierścieni i tym podobnych detali
DE112018002730T5 (de) 2017-05-29 2020-03-05 Ihi Corporation Mehrkammer-Wärmebehandlungsvorrichtung
FR3073937B1 (fr) * 2017-11-21 2020-08-14 Ceritherm Installation de traitement thermique pour la fabrication de produits industriels.
CN111424154B (zh) * 2020-05-12 2021-01-19 浙江三基钢管有限公司 一种可定量放料的加热炉
DE102022108513A1 (de) * 2021-04-16 2022-10-20 Aerospace Transmission Technologies GmbH Steuereinrichtung und Verfahren zur Steuerung einer Anlage und eines Prozesses zur Wärmebehandlung von metallischen Werkstücken
CN116121504B (zh) * 2023-02-21 2023-09-22 北京中孚悦达真空科技有限公司 一种立式真空水淬炉

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Also Published As

Publication number Publication date
DE59603946D1 (de) 2000-01-27
CA2173058A1 (fr) 1996-10-01
JPH08285462A (ja) 1996-11-01
ATE187985T1 (de) 2000-01-15
EP0735149A1 (fr) 1996-10-02
ES2141401T3 (es) 2000-03-16
US5722825A (en) 1998-03-03
DE29505496U1 (de) 1995-06-01

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