EP0754768B1 - Four pour le traitement thermique de charges de pièces métalliques - Google Patents

Four pour le traitement thermique de charges de pièces métalliques Download PDF

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Publication number
EP0754768B1
EP0754768B1 EP96710009A EP96710009A EP0754768B1 EP 0754768 B1 EP0754768 B1 EP 0754768B1 EP 96710009 A EP96710009 A EP 96710009A EP 96710009 A EP96710009 A EP 96710009A EP 0754768 B1 EP0754768 B1 EP 0754768B1
Authority
EP
European Patent Office
Prior art keywords
gas
chamber
heating chamber
furnace
cooling
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
EP96710009A
Other languages
German (de)
English (en)
Other versions
EP0754768A1 (fr
Inventor
A. Goetz
W. Peter
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
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Filing date
Publication date
Application filed by Ipsen International GmbH filed Critical Ipsen International GmbH
Publication of EP0754768A1 publication Critical patent/EP0754768A1/fr
Application granted granted Critical
Publication of EP0754768B1 publication Critical patent/EP0754768B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
    • 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
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply devices
    • 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
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/14—Arrangements of heating devices
    • F27B2005/143—Heating rods disposed in the chamber
    • 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
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply devices
    • F27B2005/161—Gas inflow or outflow
    • F27B2005/162—Gas inflow or outflow through closable or non-closable openings of the chamber walls
    • 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
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply devices
    • F27B2005/166—Means to circulate the atmosphere
    • F27B2005/167—Means to circulate the atmosphere the atmosphere being recirculated through the treatment chamber by a turbine
    • 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
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply devices
    • F27B2005/166—Means to circulate the atmosphere
    • F27B2005/167—Means to circulate the atmosphere the atmosphere being recirculated through the treatment chamber by a turbine
    • F27B2005/168—Means to circulate the atmosphere the atmosphere being recirculated through the treatment chamber by a turbine by more than one turbine

Definitions

  • the invention relates to a furnace for the heat treatment of batches of metal Workpieces, especially vacuum furnaces, with a furnace housing and one therein leaving one divided into an outer and an inner chamber Intermediate trained heating chamber, as well as with one within the furnace housing arranged gas cooling device, which over the chambers and in at least two heating chamber walls formed closable openings with the Heating chamber for the supply and removal of cooling gas is connected, the outer, the Chamber surrounding the heating chamber as a pressure chamber of a cooling gas blower and the inner chamber arranged between the heating chamber and the gas cooling device is designed as a suction chamber of the cooling gas blower.
  • Furnaces of the type described above are of various types Embodiments known. From DE utility model 93 11 985
  • a furnace is known in which the in the heating chamber walls trained openings by means of a hatch mechanism or rotatable ring plate can be opened and closed.
  • the cooling gas can enter the heating chamber unhindered, but it points into the Heating chamber penetrating cooling gas jet does not have a large depth of penetration because on the one hand the diameter D of the opening is very large and the nozzle length L is very small. This does not lead to the formation of a real gas jet or only a very short beam.
  • the distance between the opening and the batch is very large, so that the cooling gas jet up resolved to hit the batch.
  • a greater cooling effect of the Gases in such an oven can only be produced by Increase in gas velocity and thus the performance of the Cooling gas blower can be achieved, which in turn is larger and more expensive Blower motors.
  • the invention has for its object to avoid the disadvantages mentioned above to create a furnace for the heat treatment of batches of metallic workpieces, which allows targeted cooling of the batch arranged in the furnace chamber with a high penetration depth without increasing the cooling gas blower.
  • gas-guiding devices are arranged such that they are adjustable in such a way that they block the cooling gas flow from the pressure chamber to the heating chamber in the upper position lifted from the openings and in the position lowered onto the openings the cooling gas flow from the Shut off the suction chamber towards the heating chamber and that each gas guiding device consists of a box-shaped support frame in which interchangeable gas guide elements can be used.
  • the gas guide consists of a box-shaped support frame, in the interchangeable gas guide elements can be used.
  • This interchangeability the gas guiding elements is particularly advantageous since this retrofits the furnace can be carried out particularly quickly and easily on new batch types can.
  • the Gas guiding element usable as one with nozzles provided plate formed.
  • the nozzles show that the core jet has a high penetration depth a funnel-shaped inflow area.
  • the arrangement of the nozzles in the height-adjustable gas guide device it is thus possible, by the Selection of the nozzle diameter and the distance between the Nozzle outlet and the batch surface the penetration depth of the core jet of the Cooling gas in the batch can be predetermined.
  • the Gas guiding element usable as one with a variety rectifier grid provided with holes is formed.
  • a such rectifier grid is one with a variety of Drilled plate, which is about 90% of the open cross section of the in the opening of the heating chamber wall.
  • the use of a such rectifier grid is made possible by that height-adjustable gas guide first a certain dynamic pressure in the Pressure chamber can be built up so that the rectifier grid incident cooling gas flow through the holes in the rectifier grid without significant speed reductions and flow resistance is evened over the width of the opening.
  • Such inexpensive too Manufacturing rectifier grids are used especially when none large depths of penetration are required.
  • the furnace system shown in Fig. 1 consists essentially of a Furnace housing 1 and two pressure-tight with this furnace housing 1 closable hoods 2, the left hood 2 for receiving a - Not shown - electric drive for a cooling gas blower 3 is used.
  • Inside the furnace housing 1 is an outer chamber 4 Surrounded heating chamber 6 surrounded by heating chamber walls 5 arranged.
  • Heating chamber 6 surrounded by heating chamber walls 5 arranged.
  • Heating elements arranged. Circulating the furnace atmosphere within the Heating chamber 6 takes place in the case of convective heating via a fan 8.
  • Gas cooling device 9 arranged, consisting of the cooling gas blower 3 and a Heat exchanger 10 exists. Starting from the left hood 2 for recording of the electric drive for the cooling gas blower 3 is the outer, the heating chamber 6 surrounding chamber 4 as with the pressure side of the cooling gas blower 3 connected pressure chamber formed while an inner, between the Heating chamber 6 and the gas cooling device 9 formed chamber 11 as with the suction side of the cooling gas blower 3 connected suction chamber is formed.
  • the heating chamber walls 5 have openings 12 which for connecting to the pressure chamber 4 or the suction chamber 11 via hatches 13 can be opened and closed. These hatches 13 are over one Hatch actuation 14, not described in more detail, can be driven.
  • the gas guiding devices 15 each consist of an exemplary embodiment Support frame 16, can be used in the interchangeable gas guide elements 17 are.
  • the gas guiding devices 15 are in the area of Openings 12 arranged that these in the of the openings 12th lifted upper position (shown in Fig. 1 below), the pressure chamber 4th shut off to the heating chamber 6 and lowered into the opening 12 Position (shown in Fig. 1 above) the suction chamber 11 towards the heating chamber 6 cordoned off.
  • the gas guide devices 15 are operated as follows during operation:
  • the heating elements arranged in the heating chamber 6 are switched off and then the cooling gas blower 3 switched on.
  • the cooling gas blower builds up in the pressure chamber 4 to a certain dynamic pressure of the cooling gas.
  • the hatches 13 are opened via the hatch actuations 14, so that a unhindered access to the heating chamber 6 is possible via the openings 12, as shown in Fig. 2b.
  • Gas guiding elements 17 are designed as plates 19 provided with nozzles 18.
  • the use of nozzles 18 as gas guide elements 17 is special Advantageous, since this enables a targeted and a predeterminable penetration depth having cooling gas flow to Charge 7 is possible.
  • the heating chamber 6 In the operating position shown in Fig. 2c, the heating chamber 6 is over the cooling gas flowing in from the pressure chamber 4 is flooded.
  • the hot Furnace gas as well as the heated cooling gas are over the opposite Opening 12 suctioned out to the suction chamber 11, because on this side Gas guide device 15 is in the upper position in which one unimpeded connection between the heating chamber 6 and the suction chamber 11 exists.
  • the cooling gas is cooled back and passes through the Pressure chamber 4 again in the heating chamber 6.

Claims (4)

  1. Four pour le traitement thermique de lots de pièces métalliques à oeuvrer, en particulier four sous vide, comprenant un boítier de four (1) et une chambre de chauffe (6) réalisée dans ledit boítier en libérant un intervalle subdivisé en une chambre extérieure et une chambre intérieure (4, 11), ainsi qu'un dispositif de refroidissement à gaz (9) agencé à l'intérieur du boítier de four (1) et qui est relié avec la chambre de chauffe (6) via les chambres (4, 11) et via des ouvertures (12) obturables réalisées dans au moins deux parois (5) de la chambre de chauffe (6), en vue de l'alimentation et de l'évacuation de gaz de refroidissement, dans lequel la chambre extérieure (4) qui entoure la chambre de chauffe (6) est réalisée sous forme de chambre de refoulement d'un ventilateur de gaz de refroidissement (3), et la chambre intérieure (11) agencée entre la chambre de chauffe (6) et le dispositif de refroidissement à gaz (9) est réalisée sous forme de chambre d'aspiration du ventilateur de gaz de refroidissement (3),
    caractérisé en ce que
    dans la région des ouvertures (12) sont agencés des dispositifs de guidage de gaz (15) avec faculté de réglage en hauteur de telle manière que ces dispositifs, dans la position supérieure soulevée depuis les ouvertures (12), bloquent l'écoulement de gaz de refroidissement depuis la chambre de refoulement (4) vers la chambre de chauffe (6) et, dans la position abaissée sur les ouvertures (12), ils bloquent l'écoulement du gaz de refroidissement depuis la chambre d'aspiration (12) vers la chambre de chauffé (6), et en ce que chaque dispositif de guidage de gaz (15) est constitué par un cadre porteur (16) en forme de caisson, dans lequel des éléments de guidage de gaz interchangeables (17) peuvent être mis en place.
  2. Four selon la revendication 1, caractérisé en ce que l'élément de guidage de gaz (17) est réalisé sous la forme d'une plaque (19) pourvue de buses (18).
  3. Four selon la revendication 2, caractérisé en ce que les buses (18) de l'élément de guidage de gaz (17) comportent une zone d'écoulement entrante en forme d'entonnoir.
  4. Four selon la revendication 1, caractérisé en ce que l'élément de guidage de gaz (17) est réalisé sous forme d'une grille redresseuse pourvue d'une pluralité de trous.
EP96710009A 1995-07-21 1996-07-13 Four pour le traitement thermique de charges de pièces métalliques Expired - Lifetime EP0754768B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19526676 1995-07-21
DE19526676 1995-07-21

Publications (2)

Publication Number Publication Date
EP0754768A1 EP0754768A1 (fr) 1997-01-22
EP0754768B1 true EP0754768B1 (fr) 2001-06-13

Family

ID=7767437

Family Applications (2)

Application Number Title Priority Date Filing Date
EP96710008A Withdrawn EP0754769A1 (fr) 1995-07-21 1996-07-13 Four pour le traitement thermique de charges de pièces métalliques
EP96710009A Expired - Lifetime EP0754768B1 (fr) 1995-07-21 1996-07-13 Four pour le traitement thermique de charges de pièces métalliques

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP96710008A Withdrawn EP0754769A1 (fr) 1995-07-21 1996-07-13 Four pour le traitement thermique de charges de pièces métalliques

Country Status (4)

Country Link
EP (2) EP0754769A1 (fr)
AT (1) ATE202152T1 (fr)
DE (2) DE59607067D1 (fr)
ES (1) ES2159710T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2322673A2 (fr) 2009-11-13 2011-05-18 Ipsen International GmbH Procédé et dispositif de guidage du flux dans des fours industriels pour le traitement à chaud de matières/pièces usinées métalliques
WO2012037905A1 (fr) 2010-09-24 2012-03-29 Ipsen International Gmbh Procédé et dispositif destinés à guider un écoulement dans des fours industriels pour le traitement thermique de matériaux/pièces métalliques

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19820083A1 (de) * 1998-05-06 1999-11-11 Ald Vacuum Techn Gmbh Verfahren zum Abschrecken von Werkstücken und Wärmebehandlungsanlage zur Durchführung des Verfahrens
US6533991B1 (en) * 2000-06-20 2003-03-18 Ipsen International, Inc. Cooling gas injection nozzle for a vacuum heat treating furnace
JP4573290B2 (ja) * 2003-10-17 2010-11-04 株式会社Ｉｈｉ 高圧熱処理炉
FR2864106B1 (fr) * 2003-12-23 2006-08-11 Etudes Const Mecaniques Dispositif de trempe
US8088328B2 (en) 2008-06-13 2012-01-03 Jones William R Vacuum nitriding furnace
DE102015011504A1 (de) * 2015-09-09 2017-03-09 Ipsen International Gmbh Vorrichtung zur Behandlung von metallischen Werkstücken mit Kühlgas

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3208574A1 (de) * 1982-03-10 1983-09-22 Schmetz Industrieofenbau und Vakuum-Hartlöttechnik KG, 5750 Menden "vakuum-schachtofen"
DE3215509A1 (de) * 1982-04-26 1983-10-27 Schmetz Industrieofenbau und Vakuum-Hartlöttechnik KG, 5750 Menden Vakuum-kammerofen
DE3224971A1 (de) * 1982-07-03 1984-01-05 Schmetz Industrieofenbau und Vakuum-Hartlöttechnik KG, 5750 Menden Vakuum-schachtofen
DE3321554C1 (de) * 1982-07-16 1984-02-16 Ipsen Industries International Gmbh, 4190 Kleve Industrieofen zur Wärmebehandlung metallischer Werkstücke
DE3346884A1 (de) * 1983-12-23 1985-07-11 Ipsen Industries International Gmbh, 4190 Kleve Industrieofen zur waermebehandlung metallischer werkstuecke
FR2651307B1 (fr) * 1989-08-29 1993-12-17 Traitement Sous Vide Four de traitement thermique equipe de moyens de refroidissement perfectionnes.
DE9311985U1 (de) * 1993-08-11 1993-10-14 Ipsen Ind Int Gmbh Ofen zur Wärmebehandlung von Chargen metallischer Werkstücke
DE9400222U1 (de) * 1994-01-08 1994-02-24 Ipsen Ind Int Gmbh Mehrkammerofen mit kombinierter Abkühlung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2322673A2 (fr) 2009-11-13 2011-05-18 Ipsen International GmbH Procédé et dispositif de guidage du flux dans des fours industriels pour le traitement à chaud de matières/pièces usinées métalliques
DE102009052900A1 (de) 2009-11-13 2011-05-19 Ipsen International Gmbh Verfahren und Einrichtung zur Leitung der Strömumg in Industrieöfen für die Wärmebehandlung von metallischen Werkstoffen/Werkstücken
WO2012037905A1 (fr) 2010-09-24 2012-03-29 Ipsen International Gmbh Procédé et dispositif destinés à guider un écoulement dans des fours industriels pour le traitement thermique de matériaux/pièces métalliques

Also Published As

Publication number Publication date
DE59607067D1 (de) 2001-07-19
ATE202152T1 (de) 2001-06-15
EP0754769A1 (fr) 1997-01-22
ES2159710T3 (es) 2001-10-16
EP0754768A1 (fr) 1997-01-22
DE19628383A1 (de) 1997-02-06

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