EP0662519B1 - Appareil de traitement thermique de pièces - Google Patents

Appareil de traitement thermique de pièces Download PDF

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Publication number
EP0662519B1
EP0662519B1 EP94111942A EP94111942A EP0662519B1 EP 0662519 B1 EP0662519 B1 EP 0662519B1 EP 94111942 A EP94111942 A EP 94111942A EP 94111942 A EP94111942 A EP 94111942A EP 0662519 B1 EP0662519 B1 EP 0662519B1
Authority
EP
European Patent Office
Prior art keywords
bottom part
batch
shaft
heating unit
disposed
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
EP94111942A
Other languages
German (de)
English (en)
Other versions
EP0662519A1 (fr
Inventor
Bernhard Wilhelmi
Horst Gerdes
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.)
ALD Vacuum Technologies GmbH
Original Assignee
ALD Vacuum Technologies 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 ALD Vacuum Technologies GmbH filed Critical ALD Vacuum Technologies GmbH
Publication of EP0662519A1 publication Critical patent/EP0662519A1/fr
Application granted granted Critical
Publication of EP0662519B1 publication Critical patent/EP0662519B1/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
    • 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
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material
    • 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

Definitions

  • the invention relates to a device for heat treatment of workpieces, especially one with hydrogen gas operated as cooling gas under excess pressure Furnace for hardening metallic workpieces, with a die Heating chamber for receiving the workpiece batch including housing connected to a vacuum pump with gas inlet and opening into the heating chamber Gas outlet openings, an engine-blower unit, the Blower wheel circulates the cooling gas and a heating unit.
  • the device is for this with a lockable steel container and one inner heating chamber to hold the batch and with a gas blower and a gas guide device for generation a circulation flow through the heating chamber.
  • the essentially circular cylindrical steel container is supported on a fixed support structure, with its longitudinal axis aligned vertically is and with a top supported by its Lower part can be lifted off.
  • the batch itself rests a support frame, which in turn is on the housing cover the lower part is supported.
  • a disadvantage of the known device is the uneven Heating and cooling of the batch, especially as a result of only in the middle Housing part arranged heating elements and only the Batch flowing in one direction and peripherally Cooling gas flow.
  • the present invention is based on the object to create a device that has the disadvantages of the known Avoids device so that e.g. also rotationally symmetrical thin-walled workpieces on their True to form, highest demands are made, heat-treated can be without a subsequent post-treatment because of possible warping or cracking of the workpieces becomes necessary.
  • the invention allows a wide variety of design options to; one of them is in the attached drawing shown in more detail, which the partial section through the lower part of the vacuum chamber of an industrial furnace Heat treatment of metallic workpieces shows, where on lower housing cover of the vacuum chamber of the rotatable Table arranged for the workpieces to be treated is.
  • a vacuum heat treatment furnace of the one in question Art usually consists of a hollow cylindrical Housing, one end wall of which can be closed by a cover is, one on the other end wall of the housing arranged blower motor with impeller, one Hollow cylindrical batch chamber arranged inside the housing with a batch basket that can be used in this or support grid, in or towards which in turn treating workpieces can be placed, several to the immediate vicinity of the support grate extending, aligned parallel to the longitudinal axis of the housing Heating pipes, one between the blower motor and the support grid provided in the interior of the housing Blower housing and one in the annulus between the inside wall of the housing and the outside wall of the batch chamber housed from one of a refrigerant flow through existing coil.
  • the heat treatment furnace is usually over one Suction line connected to a vacuum pump, the Suction nozzle opens into a chimney, the suction line can be shut off by an evacuation valve.
  • the gas inlet lines a which are connected to gas containers and in the Valves are turned on through the two lines are lockable.
  • the illustration shows only the lower housing cover 3, which rests on a frame, of which only one of the Supports 4 is shown and that with a bearing ring 5 is firmly welded, on which a support bearing 6 is arranged is (ball slewing ring), on which in turn the Bottom part 7 of the rotatable batch table 8 rests.
  • the Batch table 8 is with slip rings on its underside 9, 10 provided with the current contacts 11, 12 correspond, the brackets 13, 14 firmly with the Housing cover 3 are connected and formed are that the upper end faces of the current contacts 11, 12 with a certain preload on the slip rings 9, 10 concern.
  • the bottom of the bottom part 7 of the batch table 8 has a bearing pin 15 which is sealed against the bearing ring 5 and after below is extended by a shaft 16 on which the Pulley 17 is arranged rotatably, the over a toothed belt 18 or drive chain with the pulley 20 of the motor gear unit 19 is connected, so that with the help of the motor gear unit 19 (with Three-phase motor) of the batch table 8 around the axis A in Rotation can be offset.
  • the shaft 16 is around a Pipe section 21, 49 extended with a fixed Bearing 22 is rotatably connected via a support 23, on which a centering rod 24 is mounted, which is passed through an inner tube 25 and the causes the inner tube 25 not together with the shaft 16 or the journal 15 and the bottom part 7 turns.
  • the bottom part is 7th provided with a cavity 26 which is connected to the inner tube 25 is in communication, so that on the connecting piece 27 in the annular space between the inner tube 25 and the Longitudinal bore 30 in the pipe section 21 upward flowing cooling water also the cavity 26 in the bottom part 7 for the purpose flows through the cooling of the batch table 8 (rotatable Cooling water duct). That returned from the cavity 26 Coolant flows through the inner tube 25 and exits at the connecting piece 31 again.
  • On the Top of the bottom part 7 of the batch table 8 are a plurality of supports 32, 32 ', ... made of graphite or Ceramics attached, which in turn bearing pieces 33, 33 ', ... hold onto the rods 34, 34 ', ...
  • the two connecting rods 39, 40 extend further vertical holding arms 41, 42, which are firmly on the bottom part 7 are anchored and each have an insulation plate Hold 43 or 44 in a plane that is parallel to the Level of the bottom part 7 extends. Furthermore is on the Bottom part 7 a bracket 45 attached to the bearing pieces 33, 33 ', ... keeps a distance from each other. Finally, two sensors 46, 47 are on the bearing ring 5 ' provided, the sliding contacts not shown with parts arranged on the bottom part 7 communicate with the device so that the temperature measurable at different locations of the device is.
  • the insulation plate 43 (Graphite hard felt insulation) with a central opening 50 is provided, which a flow of the cooling gas of bottom up through the batch table 8 and thus also by the on the of the rods 34, 34 ', ... formed rust allows deposited workpieces.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Heat Treatment Of Articles (AREA)

Claims (6)

  1. Appareil de traitement thermique de pièces, en particulier four pour la trempe de pièces métalliques, exploité avec de l'hydrogène comme gaz de refroidissement sous surpression, comportant une enveloppe (2) qui enclôt la chambre chauffante prévue pour recevoir la charge de pièces, et reliée à une pompe à vide, peut s'ouvrir par un couvercle (3) et présente des ouvertures d'entrée et de sortie du gaz débouchant dans la chambre chauffante, comportant aussi un groupe moto-ventilateur dont la turbine recycle le gaz de refroidissement, et un groupe de chauffage (37, 37',...) ainsi qu'un plancher (7), porté sur le couvercle (3) de l'enveloppe et pouvant tourner autour d'un axe vertical (A), d'une table à charges (8), le plancher (7) étant relié, par sa face intérieure, à un tourillon (15) qui traverse de façon étanche, le couvercle (3) de l'enveloppe par un support annulaire (5) et qui est couplé par un arbre (16) à un mécanisme d'entraínement motorisé (19) par lequel le plancher (7), et donc la table à charges (8), peuvent être entraínés en rotation, caractérisé par le fait que sur ce plancher (7) sont disposés le groupe de chauffage (37, 37',...) avec une grille prévue au-dessus du groupe de chauffage (37, 37',...) et formée de tiges (33, 33',... ou 34, 34',...) pour le dépôt de la charge de pièces, étant précisé qu'en dessous du groupe de chauffage (37, 37',...) est disposée au moins une plaque isolante (43, 44).
  2. Appareil selon la revendication 1, caractérisé par le fait que le plancher (7) de la table à charges (8) comporte des espaces creux (26) ou canaux de refroidissement qui sont parcourus par un agent réfrigérant, les espaces creux (26) ou canaux correspondant, par l'intermédiaire de voies d'écoulement (29, 48), qui s'étendent parallèlement à l'arbre (16) et en son intérieur, avec les raccords (27, 31) prévus pour l'alimentation en agent réfrigérant.
  3. Appareil selon la revendication 1, caractérisé par le fait que la face intérieure du plancher (7) de la table à charges (8) est munie de chemins de contact ou anneaux frotteurs (9,...) qui collaborent avec des contacts frotteurs (11, 12) passant, avec isolation, à travers le couvercle (3) de l'enveloppe et par l'intermédiaire desquels le groupe de chauffage (37, 37',...) peut être relié à une source du courant électrique de chauffage.
  4. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé par le fait que l'arbre (16) prolonge le tourillon (15) vers le bas et présente un alésage longitudinal centré (30), étant précisé que dans cet alésage longitudinal (30) est disposé un tube intérieur (25) qui s'étend coaxialement à cet alésage et sépare un canal annulaire extérieur (29), parcouru par l'agent réfrigérant, d'avec un canal central (48) également parcouru par l'agent réfrigérant.
  5. Appareil selon une ou plusieurs des revendications précédentes, caractérisé par le fait que le support annulaire (5, 5') présente des perçages par lesquels passent avec étanchéité, les détecteurs de mesure (46, 47) ou leurs conducteurs électriques, étant précisé que les extrémités, respectivement situées du côté de la table à charges (8) , des ces conducteurs électriques (46, 47) collaborent avec des frotteurs annulaires qui sont disposés, avec isolation, sur la face inférieure du plancher (7) et, de leur côté, sont soit reliés à des détecteurs disposés au voisinage du groupe de chauffage (37, 37',...), soit directement reliés à des détecteurs qui pénètrent dans les espaces creux (26) ou canaux pour l'agent réfrigérant.
  6. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé par le fait que coaxialement à l'arbre (16) du plancher (7) est disposée une tringle de centrage (24) dont l'extrémité inférieure opposée à la table à charges (8) s'appuie sur un appui (22) fixe en position, étant précisé que l'extrémité inférieure de la tringle de centrage (24) passe, avec étanchéité, à travers l'extrémité inférieure d'un élément tubulaire (21, 49) maintenu sur l'appui (22) et prolongeant vers le bas l'arbre (16) sans liberté de rotation relative et étant précisé que l'extrémité supérieure de la tringle de centrage (24) est repliée à angle droit et est reliée à l'arbre (16) sans liberté de rotation relative.
EP94111942A 1994-01-07 1994-07-30 Appareil de traitement thermique de pièces Expired - Lifetime EP0662519B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4400326A DE4400326C2 (de) 1994-01-07 1994-01-07 Vorrichtung zum Härten metallischer Werkstücke
DE4400326 1994-01-07

Publications (2)

Publication Number Publication Date
EP0662519A1 EP0662519A1 (fr) 1995-07-12
EP0662519B1 true EP0662519B1 (fr) 2000-05-31

Family

ID=6507572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94111942A Expired - Lifetime EP0662519B1 (fr) 1994-01-07 1994-07-30 Appareil de traitement thermique de pièces

Country Status (4)

Country Link
US (1) US5478057A (fr)
EP (1) EP0662519B1 (fr)
DE (2) DE4400326C2 (fr)
NL (1) NL194675C (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9704229D0 (en) * 1997-02-28 1997-04-16 Mckechnie Plc Fastener installing machine
US5934871A (en) * 1997-07-24 1999-08-10 Murphy; Donald G. Method and apparatus for supplying a anti-oxidizing gas to and simultaneously cooling a shaft and a fan in a heat treatment chamber
CN103836893B (zh) * 2012-11-21 2016-12-21 神华集团有限责任公司 一种具有旋转料床的干燥炉或热解炉
CN105112612A (zh) * 2015-09-06 2015-12-02 重庆赛迪热工环保工程技术有限公司 一种罩式炉炉台
CN105755219B (zh) * 2016-03-14 2018-01-19 浙江沪新不锈钢制造有限公司 天然气退火炉
CN109943702A (zh) * 2018-03-08 2019-06-28 王德伟 旋转淬火系统
CN112981051B (zh) * 2020-12-24 2024-03-29 无锡市博伟锻造有限公司 一种石油防井喷设备用锻制工件精加工前的热处理方法
US11971216B1 (en) 2021-12-23 2024-04-30 Rolls-Royce High Temperature Composites, Inc. Retort with loading window
CN114438291B (zh) * 2022-01-12 2024-04-05 重庆市璧山汇泰机械有限责任公司 一种齿轮胚正火处理后冷却装置
CN114891959B (zh) * 2022-05-11 2023-03-17 兴化市剑达铸造有限公司 一种金属热处理加工用冷却装置
CN115747460A (zh) * 2022-11-21 2023-03-07 浙江新春宇航轴承有限公司 一种轴承套圈的淬火系统及其淬火工艺

Family Cites Families (11)

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US804883A (en) * 1901-09-06 1905-11-21 Ruggles Coles Engineering Company Furnace.
US931663A (en) * 1903-11-02 1909-08-17 Libbey Glass Co Furnace.
US4102637A (en) * 1976-09-16 1978-07-25 Abar Corporation Work support for vacuum electric furnaces
SU1129251A1 (ru) * 1981-09-22 1984-12-15 Институт черной металлургии Стенд колпаковой печи
DE3416902A1 (de) * 1984-05-08 1985-11-14 Schmetz Industrieofenbau und Vakuum-Hartlöttechnik KG, 5750 Menden Verfahren und vakuumofen zur waermebehandlung einer charge
US4604056A (en) * 1985-03-01 1986-08-05 Jones William R Vacuum furnace system hearth
JPS61243115A (ja) * 1985-04-18 1986-10-29 Daido Steel Co Ltd 真空熱処理装置
DE3518347C1 (de) * 1985-05-22 1986-12-04 Ruhrgas Ag, 4300 Essen Ofen zur Waermebehandlung von Werkstuecken
DE3818471A1 (de) * 1988-05-31 1989-12-21 Ipsen Ind Int Gmbh Ofen zur waermebehandlung von eisen- und stahlteilen
JPH04362121A (ja) * 1991-06-07 1992-12-15 Nissin Electric Co Ltd 熱処理コーティング装置
DE4312627A1 (de) * 1993-04-19 1994-10-20 Hauzer Holding Verfahren und Vorrichtung zur Wärmebehandlung von Gegenständen

Also Published As

Publication number Publication date
US5478057A (en) 1995-12-26
NL194675C (nl) 2002-11-04
DE59409387D1 (de) 2000-07-06
DE4400326A1 (de) 1995-07-13
EP0662519A1 (fr) 1995-07-12
NL194675B (nl) 2002-07-01
DE4400326C2 (de) 2002-10-31
NL9401597A (nl) 1995-08-01

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