EP1488181B1 - Installation pour le traitement thermique de pieces a usiner - Google Patents

Installation pour le traitement thermique de pieces a usiner Download PDF

Info

Publication number
EP1488181B1
EP1488181B1 EP03714799A EP03714799A EP1488181B1 EP 1488181 B1 EP1488181 B1 EP 1488181B1 EP 03714799 A EP03714799 A EP 03714799A EP 03714799 A EP03714799 A EP 03714799A EP 1488181 B1 EP1488181 B1 EP 1488181B1
Authority
EP
European Patent Office
Prior art keywords
opening
charging
lock
plant according
discharging
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
EP03714799A
Other languages
German (de)
English (en)
Other versions
EP1488181A1 (fr
Inventor
Horst Becker
Friedhelm Kühn
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.)
LOI Thermprocess GmbH
Original Assignee
LOI Thermprocess 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 LOI Thermprocess GmbH filed Critical LOI Thermprocess GmbH
Publication of EP1488181A1 publication Critical patent/EP1488181A1/fr
Application granted granted Critical
Publication of EP1488181B1 publication Critical patent/EP1488181B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/38—Arrangements of devices for charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/39—Arrangements of devices for discharging
    • 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
    • C21D1/62—Quenching devices
    • C21D1/63—Quenching devices for bath quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
    • 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
    • C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
    • 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
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/028—Multi-chamber type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
    • F27B9/045—Furnaces with controlled atmosphere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/40—Arrangements of controlling or monitoring devices
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/18—Door frames; Doors, lids, removable covers
    • F27D1/1858—Doors
    • F27D2001/1891—Doors for separating two chambers in the furnace
    • 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
    • F27D3/0024—Charging; Discharging; Manipulation of charge of metallic workpieces

Definitions

  • the invention relates to a plant for the heat treatment of workpieces, comprising a cyclically rotary rotary hearth furnace having an outer and an inner wall defining a furnace space, which is divided by means of vertically movable doors in a heating zone and at least one treatment zone, wherein in the outer wall in the heating zone, a first closable opening for loading or unloading is arranged, with a first quenching device and with a transport device for transporting the workpieces in the rotary hearth furnace and from this into the first quenching device.
  • Such a plant is from the DE-C1-3427716 known. It is a system for hardening of individual parts with a rotary hearth furnace and a hardening press.
  • the rotary hearth furnace has a lock-like loading or unloading zone, which is formed by means of both sides of the loading and unloading arranged vertically movable doors. From this loading or unloading the workpieces can be removed individually after opening the oven door using a loading and unloading robots and transferred to the hardness press.
  • the cycle time, d. H. the time between loading and unloading a workpiece in or out of the rotary hearth furnace is relatively long in the known system, since a single opening is used both for loading and unloading. Therefore, there is also a need to minimize the cycle time.
  • the EP-A1-0 735 149 discloses a plant for heat treatment of workpiece batches under vacuum.
  • a rotary kiln has in the outer wall a first opening with a door exclusively for loading and a second opening exclusively for unloading, the second opening being preceded by a sluice by means of which a cooling chamber or quenching chamber is connected to the rotary kiln.
  • the tool batches are transported to different treatment furnaces which are arranged outside on the circumference of the rotary kiln, for example a carburizing kiln chamber.
  • the workpieces from the turntable To enter the To reach treatment furnaces, the workpieces from the turntable must be transported transversely to the direction of rotation in the treatment furnaces.
  • the U.S.-A-4,496,312 discloses a plant with a rotary hearth furnace for heat treatment of workpieces.
  • the rotary hearth furnace is divided by means of doors in a heating zone and a cooling zone.
  • a first opening, preceded by a preheating chamber, serves exclusively to load the rotary hearth furnace, and a second opening, which is preceded by a cooling chamber, is used exclusively for unloading the workpieces.
  • this system is not universally applicable.
  • the GB-A-1 181 924 discloses a plant for heat treating workpieces with two ovens each having an opening 106 for loading and an opening 108 for unloading.
  • the DE-C1-3 640 325 discloses a plant for heat treating workpieces in a carbonizing atmosphere.
  • a Kohlungsofen is designed as a rotary kiln.
  • the batches can be rotated for different lengths of time, resulting in different residence times for the batches.
  • the carbonizing furnace is fed exclusively through a first opening and discharged through a second opening in a hardening furnace.
  • the system concept differs significantly from the concept of the generic system
  • the invention has for its object to provide a system of the type mentioned, the universal use and the cycle time is low.
  • the rotary hearth furnace has two closable openings, both of which can be used for loading and unloading.
  • the system of the invention is universally applicable.
  • the cycle time can be minimized and thus the hourly throughput of workpieces can be increased.
  • the two openings are arranged side by side with a small circumferential distance, wherein the circumferential distance between the first and the second opening is preferably substantially 45 °. Depending on the space conditions in the individual case, the circumferential distance can also be up to 90 °.
  • the first opening is preceded by a lock for loading.
  • the first opening is arranged vertically above the furnace chamber.
  • the first opening is preceded in the vertical direction by a loading sluice, which is designed as a known per se elevator lock, with a transport device for the horizontal transport of the workpieces.
  • the loading opening can be arranged relatively close or immediately adjacent to the removal opening. This has the advantage that the oven space available for the heat treatment can be optimally utilized.
  • both the lock and the optionally present loading lock are made gas-tight.
  • the locks have at least one lock door which extends substantially perpendicular to the opening in the outer wall.
  • the lock door is thus located in a side wall of the lock.
  • the quench bath which is connected by means of the lock with the rotary hearth furnace, is accordingly arranged on a side wall of the lock.
  • a further quenching device is connected to the rotary hearth furnace by means of the lock at the second opening.
  • This may be a gas quenching chamber or another quench bath.
  • the two quenching devices are arranged on the opposite side walls of the lock.
  • At least one opening is associated with a transport device in the form of a bumper.
  • the batch is transported by means of the bumper in a simple manner in the removal lock and transferred from there into the subsequent to the removal lock quench.
  • a bumper can also be used here.
  • the workpieces, which are packed into batches in baskets or similar containers, are transported by means of the baffle device into the lock and transferred from there into the rotary hearth furnace.
  • At least one additional vertically movable door for changing the length of the heating and / or the treatment zone is present.
  • the additional door can be used as needed for zone separation. All doors are individually controllable and thus individually movable.
  • An embodiment of the rotary hearth furnace is characterized in that the second closable loading and unloading opening in the outer wall, adjacent to the heating zone and spaced from the first loading and unloading opening is arranged and that the rotary hearth is rotatable in both directions.
  • This rotary hearth furnace offers the choice between two loading and unloading options. Both loading and unloading openings can be used both for loading and unloading. Both loading and unloading are adjacent to the heating zone, so that when each opening is charged ensures that the workpieces, after they have been introduced into the furnace chamber, get directly into the heating zone. It only has to be changed in accordance with the direction of rotation of the rotary hearth. This functionality of the rotary hearth furnace is significantly improved.
  • the heating zone extends between the first and second loading and unloading over a range of substantially 90 °.
  • At least two treatment zones are provided, each of which adjoins the heating zone and which are differently adjustable with regard to treatment temperature and treatment atmosphere.
  • the lock is accordingly preferably made gas-tight.
  • doors are provided on both sides immediately adjacent to the first loading and unloading opening, so that a loading and unloading zone is formed, which can be heated.
  • This system is particularly universally applicable, since a quenching device is provided at each opening. Each opening is used both for loading and unloading. Depending on the, through which of the two openings the workpieces get into the oven, the direction of rotation of the rotary hearth furnace is changed, so that the workpieces first reach the heating zone.
  • the plant for the hardening of workpieces according to Fig. 1 comprises a rotary hearth furnace 1, the clockwise rotatable exclusively in one direction, in the clockwise direction.
  • the furnace chamber is divided by means of doors 5a-5d into a heating zone 6 and three treatment zones 7, 8, 9, namely a first and a second diffusion / carbon zone 7, 9, and a carbon zone 8.
  • the doors 5a-5d are vertically raised in a manner not shown.
  • the workpieces are located on batch carriers 10 in the form of grates.
  • a first closable opening 11, which is preceded by a gas-tight lock 12 for loading In the outer wall is located at the beginning of the heating zone 6, a first closable opening 11, which is preceded by a gas-tight lock 12 for loading.
  • the opening 10 between the furnace chamber and lock 12 can be opened or closed in a known manner by means of an oven door.
  • the lock 12 has a lock door 13 which substantially perpendicular to the opening 10 and which is alternately opened or closed for loading.
  • the batch carriers 10 are located with the workpieces in a pre-oxidation oven 14.
  • the batch carriers 10 are inserted from the lock 12 into the oven space by means of a first push device 15.
  • the batch carrier 10 arrive due to the rotation of the rotary hearth clockwise first in the heating zone 6 on and from the heating zone 6 in the treatment zones 7, 8 and 9. It is in the treatment zones to diffusion / carbon zones, in which the treatment temperatures and the treatment atmosphere are different adjustable.
  • the treatment atmosphere or a neutral gas, such as nitrogen may be
  • a second closable opening 16 In the outer wall 2 is a second closable opening 16, which is preceded by a gas-tight lock 17 for unloading. Between the two openings 11 and 16 there is a circumferential distance of about 45 °. To the lock 17 are connected via not shown lock doors, which extend substantially perpendicular to the opening 16, both sides of a first Abschreckbad 18 and a second Abschreckbad 19 coupled, where different temperatures prevail.
  • the unloading takes place as well as the loading intermittently.
  • the circumferential distance between the two openings may differ from 45 °.
  • the circumferential distance should be as small as possible, but can be up to 90 ° for reasons of space.
  • the second quenching device can be designed as a gas quenching chamber. Additional doors could be used to vary the length of the heating zone and / or the treatment zone.
  • Fig. 2 shows a rotary hearth furnace 21, which serves for heat treatment in the context of a process for hardening of workpieces 22, has a rotary hearth 23 which is cyclically rotatable in both directions.
  • a fixed masonry outer wall 24 and an inner wall 25 of refractory masonry form with the rotary hearth 23 and a ceiling, not shown, an annular furnace chamber shown in plan view.
  • the furnace chamber is divided by means of doors 26a-26e into a heating zone 27 and three treatment zones 28 to 30, namely a first and a second diffusion / carbon zone 28, 30 and a carbonization zone 29.
  • the doors 26a-26d are vertically raised in a manner not shown.
  • first opening 31 for loading and unloading, followed by doors 26a-26e on both sides, so that a loading and unloading zone 32 is formed.
  • An oven door 33 closes the first opening 31.
  • the loading and unloading of individual workpieces is done by a loading and unloading robot 34.
  • the loading takes place cyclically.
  • the workpieces 22 on the rotary hearth 23 are passed through the treatment zones 28, 29 and 30.
  • the treatment temperature and the treatment atmosphere are differently adjustable.
  • the first diffusion / carbon zone 28 is set up in this feed case so that the zone acts as a carbon zone.
  • the workpieces that have arrived in the loading and unloading zone 32 are removed individually after opening the oven door 33 and quenched in a hardening machine 35. Of course, the oven door 33 is closed again after each removal process.
  • a second closable opening 36 for loading and unloading.
  • the heating zone 27 which can be closed by means of a door 26b immediately behind the second opening 36 for loading and unloading.
  • the two openings 31, 36 are thus in each case adjacent to the heating zone 27.
  • the direction of rotation of the rotary hearth is selected as a function of which of the two loading and unloading openings 31, 36 is charged. In any case, the workpieces enter the heating zone after being charged.
  • the second diffusion / carbonization zone 30 is configured as a carbonation zone and the first diffusion / carbonization zone 28 as a diffusion zone.
  • the heating zone 27 may extend over a larger area of the furnace chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Tunnel Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Plural Heterocyclic Compounds (AREA)

Claims (17)

  1. Installation pour le traitement thermique de pièces, comprenant un four à sole tournante (1 ; 21) tournant de manière cadencée, qui présente une paroi extérieure et une paroi intérieure (2, 3 ; 23, 24), qui délimitent une chambre de four, qui est divisée au moyen de portes mobiles verticalement (5a-5d) en une zone de chauffage (6) et au moins une zone de traitement (7-9 ; 27 - 30), une première ouverture refermable (11 ; 31) pour le chargement et le déchargement étant prévue dans la paroi extérieure (2 ; 24) dans la zone de chauffage (6 ; 27), avec un premier dispositif de trempe (35) et avec un dispositif de transport (34) pour le transport des pièces dans le four à sole tournante (1 ; 21) et hors de celui-ci dans le premier dispositif de trempe (35),
    caractérisée en ce
    qu'une deuxième ouverture refermable (16 ; 36) pour le chargement et le déchargement est prévue dans la paroi extérieure (2 ; 24) dans la dernière zone de traitement (9 ; 28) et en ce que la deuxième ouverture (16 ; 36) est placée avant une écluse (17), au moyen de laquelle un deuxième dispositif de trempe (18; 38) est connecté au four à sole tournante (1 ; 21).
  2. Installation selon la revendication 1,
    caractérisée en ce que la première ouverture (11, 31) et la deuxième ouverture (16, 36) pour le chargement ou le déchargement sont disposées l'une à côté de l'autre à une distance périphérique de 45° environ.
  3. Installation selon la revendication 1 ou 2,
    caractérisée en ce qu'une écluse de chargement (12) est placée avant la première ouverture (11) pour le chargement et le déchargement.
  4. Installation selon la revendication 1,
    caractérisée en ce que la première ouverture (11) pour le chargement et le déchargement est disposée verticalement au-dessus de la chambre du four et en ce qu'une écluse de chargement (12) est placée avant la première ouverture dans la direction verticale, et est réalisée sous forme d'écluse élévatrice.
  5. Installation selon l'une quelconque des revendications 1 à 4,
    caractérisée en ce que l'écluse (17) et éventuellement l'écluse de chargement (12) sont réalisées de manière étanche aux gaz.
  6. Installation selon l'une quelconque des revendications 1 à 5,
    caractérisée en ce que l'écluse et éventuellement l'écluse de chargement (12) présentent au moins une porte d'écluse qui s'étend essentiellement à angle droit par rapport à l'ouverture (11, 16) dans la paroi extérieure.
  7. Installation selon l'une quelconque des revendications 1 à 6,
    caractérisée en ce que le deuxième dispositif de trempe (18, 38) est réalisé sous forme de bain de trempe.
  8. Installation selon l'une quelconque des revendications 1 à 7,
    caractérisée en ce qu'un autre dispositif de trempe (19) est connecté au four à sole tournante (1) au moyen de l'écluse (17).
  9. Installation selon la revendication 8,
    caractérisée en ce que l'autre dispositif de trempe (19) est réalisé sous forme de bain de trempe ou sous forme de chambre de trempe à gaz.
  10. Installation selon la revendication 8 ou 9,
    caractérisée en ce que la température dans l'autre dispositif de trempe (19) s'écarte de la température dans le bain de trempe (18).
  11. Installation selon l'une quelconque des revendications 1 à 10,
    caractérisée en ce qu'au moins une ouverture (11, 16) pour le chargement ou le déchargement est associée à un dispositif de transport (15, 20) en forme de dispositif de tamponnement.
  12. Installation selon l'une quelconque des revendications 1 à 11,
    caractérisée en ce qu'au moins une porte supplémentaire mobile verticalement (5a-5e), pour modifier la longueur de la zone de chauffage et/ou de traitement est prévue, toutes les portes pouvant être commandées individuellement.
  13. Installation selon l'une quelconque des revendications 1 à 12,
    caractérisée en ce que l'une des portes mobiles verticalement (5a-5e) se trouve entre la première ouverture (11) et la deuxième ouverture (16).
  14. Installation selon la revendication 1,
    caractérisée en ce que la deuxième ouverture refermable (36) pour le chargement et le déchargement, dans la paroi extérieure (24), est disposée à proximité de la zone de chauffage (27) et à distance de la première ouverture (31), et en ce que la sole tournante (1) peut tourner dans les deux sens.
  15. Four à sole tournante selon la revendication 14,
    caractérisé en ce que la zone de chauffage (27) s'étend entre la première et la deuxième ouvertures (31, 36) pour le chargement et le déchargement, sur une plage de 90° environ.
  16. Four à sole tournante selon la revendication 14 ou 15,
    caractérisé en ce qu'au moins deux zones de traitement (28 à 30) sont prévues, lesquelles se raccordent chacune à la zone de chauffage (27), et qui peuvent être ajustées différemment en termes de température de traitement et d'atmosphère de traitement.
  17. Four à sole tournante selon l'une quelconque des revendications 14 à 16,
    caractérisé en ce que directement à côté de l'ouverture (31) pour le chargement et le déchargement, sont prévues des portes (26a-26e) des deux côtés de sorte qu'il se forme une zone de chargement et de déchargement (32).
EP03714799A 2002-03-27 2003-03-11 Installation pour le traitement thermique de pieces a usiner Expired - Lifetime EP1488181B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10213991 2002-03-27
DE10213991 2002-03-27
DE10259247 2002-12-17
DE10259247 2002-12-17
PCT/EP2003/002461 WO2003081156A1 (fr) 2002-03-27 2003-03-11 Installation pour le traitement thermique de pieces a usiner

Publications (2)

Publication Number Publication Date
EP1488181A1 EP1488181A1 (fr) 2004-12-22
EP1488181B1 true EP1488181B1 (fr) 2007-07-11

Family

ID=28042866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03714799A Expired - Lifetime EP1488181B1 (fr) 2002-03-27 2003-03-11 Installation pour le traitement thermique de pieces a usiner

Country Status (8)

Country Link
US (1) US7588719B2 (fr)
EP (1) EP1488181B1 (fr)
KR (1) KR100964994B1 (fr)
CN (1) CN100434545C (fr)
AT (1) ATE366903T1 (fr)
AU (1) AU2003219035A1 (fr)
DE (2) DE10310739A1 (fr)
WO (1) WO2003081156A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2717008A3 (fr) * 2012-10-08 2017-08-23 Ipsen International GmbH Four industriel étanche au gaz de protection, notamment four à chambre, four poussant, four à sole tournante ou four à sole annulaire

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004055808A1 (de) * 2003-11-19 2005-06-23 Loi Thermprocess Gmbh Anlage und Verfahren zum Wärmebehandeln von Werkstücken
US20070205544A1 (en) * 2005-02-18 2007-09-06 O'brien & Gere Engineers, Inc. Rotary Hearth Sintering Furnace
DE102005033042B3 (de) * 2005-07-15 2006-07-27 Audi Ag Verfahren zur Wärmebehandlung metallischer Werkstücke und Vorrichtung zur Durchführung
DE102007048041A1 (de) * 2007-10-05 2009-04-09 Loi Thermprocess Gmbh Drehherdofen
DE102008000056A1 (de) 2008-01-14 2009-07-23 Loi Thermprocess Gmbh Vorrichtung und Verfahren zum Be- und Entladen eines Wärmebehandlungsofens
EP2186916B1 (fr) 2008-11-17 2013-10-02 LOI Thermprocess GmbH Procédé et installation de cémentation continue
DE102010043229A1 (de) * 2010-11-02 2012-05-03 Eva Schwartz Mehrlagenkammerofen
CN102952929A (zh) * 2011-08-23 2013-03-06 克恩-里伯斯(太仓)有限公司 一种用于连续进行热处理的装置及热处理方法
PL2685193T3 (pl) * 2012-07-11 2015-05-29 Loi Thermprocess Gmbh Sposób oraz piec karuzelowy do obróbki cieplnej elementów obrabianych
US20140134555A1 (en) * 2012-11-14 2014-05-15 Firth Rixson Thermal isolation walls in a rotary furnace application
CN106480269B (zh) * 2016-11-30 2018-03-02 浙江神牛机械制造有限公司 一种链条加工用电阻回转炉
JP7231471B2 (ja) * 2019-04-23 2023-03-01 リョービ株式会社 焼入装置および焼入方法
CN110835721A (zh) * 2019-11-27 2020-02-25 特诺恩技术（天津）有限公司 大型环形转底式气体渗碳炉的装出料机构
CN110699633A (zh) * 2019-11-27 2020-01-17 特诺恩技术（天津）有限公司 齿轮渗碳热处理的环形转底式气体渗碳炉的装出料方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1362296A (en) * 1918-10-14 1920-12-14 George J Hagan Heating-furnace
US1697820A (en) * 1924-05-02 1929-01-01 Gen Motors Corp Shaft-treating apparatus
US2892744A (en) * 1956-07-23 1959-06-30 United States Steel Corp Method and apparatus for the continuous heat-treatment of metal strip
FR1560499A (fr) * 1967-02-15 1969-03-21
LU59207A1 (fr) * 1969-07-31 1969-12-10 Wurth Anciens Ets Paul
JPS5675513A (en) * 1979-11-27 1981-06-22 Toyota Motor Corp Vertical rotary type continuous heating apparatus
DE3209245A1 (de) * 1982-03-13 1983-09-15 Brown, Boveri & Cie Ag, 6800 Mannheim Drehherdofen
JPS58217625A (ja) 1982-06-09 1983-12-17 Daido Steel Co Ltd 熱処理装置
US4486312A (en) * 1983-08-12 1984-12-04 Dionex Corporation Analysis of liquid streams using tubing with protuberances on its inner wall
GB2162208B (en) * 1984-07-20 1988-07-06 Ipsen Ind Int Gmbh Heat treatment of metal workpieces
DE3427716C1 (de) * 1984-07-27 1985-11-14 Daimler-Benz Ag, 7000 Stuttgart Drehherdofen in Ringbauart zur Waermebehandlung von Werkstuecken
DE3435376C2 (de) * 1984-09-27 1996-09-12 Loi Ipsen Holding Gmbh Verfahren zur Wärmebehandlung von Werkstücken
DE3640325C1 (de) * 1986-11-26 1988-02-04 Ipsen Ind Internat Gmbh Vorrichtung zur Waermebehandlung metallischer Werkstuecke in einer Kohlungsatmosphaere
DE3844272A1 (de) * 1988-12-30 1990-07-05 Leybold Ag Glueh- und abschreckverfahren und anlage zur durchfuehrung des verfahrens
JP2774011B2 (ja) * 1992-02-28 1998-07-09 川崎製鉄株式会社 移動炉床式連続熱処理装置
DE29505496U1 (de) * 1995-03-31 1995-06-01 Ipsen Ind Int Gmbh Vorrichtung zur Wärmebehandlung metallischer Werkstücke unter Vakuum

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2717008A3 (fr) * 2012-10-08 2017-08-23 Ipsen International GmbH Four industriel étanche au gaz de protection, notamment four à chambre, four poussant, four à sole tournante ou four à sole annulaire

Also Published As

Publication number Publication date
ATE366903T1 (de) 2007-08-15
US7588719B2 (en) 2009-09-15
KR20040091780A (ko) 2004-10-28
WO2003081156A1 (fr) 2003-10-02
CN1643324A (zh) 2005-07-20
AU2003219035A1 (en) 2003-10-08
KR100964994B1 (ko) 2010-06-21
DE50307651D1 (de) 2007-08-23
EP1488181A1 (fr) 2004-12-22
US20050161869A1 (en) 2005-07-28
CN100434545C (zh) 2008-11-19
DE10310739A1 (de) 2003-10-09

Similar Documents

Publication Publication Date Title
EP1488181B1 (fr) Installation pour le traitement thermique de pieces a usiner
EP0735149B1 (fr) Dispositif pour le traitement thermique d'articles métalliques sous vide
EP2427282B1 (fr) Dispositif et procédé pour chauffer des pièces à usiner façonnables à chaud
EP2511639B1 (fr) Four à sole tournante
EP0621904B1 (fr) Dispositif de traitement thermique de pieces metalliques
AT392653B (de) Verfahren zur waermebehandlung metallischer werkstuecke unter verwendung eines durchlauf- oder durchstossofens sowie vorrichtung zum durchfuehren dieses verfahrens
EP2717008A2 (fr) Four industriel étanche au gaz de protection, notamment four à chambre, four poussant, four à sole tournante ou four à sole annulaire
DE60110428T2 (de) Verfahren und einrichtung zur wärmebehandlung von schneidwerkzeugen
DE102005053134A1 (de) Anlage zur trockenen Umwandlung eines Material-Gefüges von Halbzeugen
EP1685355B1 (fr) Installation pour le traitement thermique de pieces diverses
EP0131955B1 (fr) Procédé et installation pour le traitement thermique d'objets cylindriques, en particulier de tubes, notamment fait de matériaux céramiques
DE3435376C2 (de) Verfahren zur Wärmebehandlung von Werkstücken
DE3209245C2 (fr)
DE19514289B4 (de) Ofenanlage zum Wärmebehandeln von Werkstücken
DE20321173U1 (de) Anlage zur Wärmebehandlung von Werkstücken
DE102009019573A1 (de) Ofen und Verfahren zum Erwärmen wenigstens eines Werkstückes
DE19856191C2 (de) Anlage zur Wärmebehandlung von Teilen
DE102007038991A1 (de) Drehherdofen zur Wärmebehandlung von Werkstücken
WO2015090590A1 (fr) Procédé, four et installation permettant le formage à chaud de pièces
EP0922120A1 (fr) Four rotatif pour traitement de pieces
DE102013018109B4 (de) Verfahren, Ofeneinrichtung und Anlage zum Formhärten von Werkstücken
DE8421677U1 (de) Drehherdofen zur waermebehandlung metallischer werkstuecke
DE19639933C1 (de) Rundtaktofen zum Behandeln von Werkstücken
EP4015657A1 (fr) Traitement thermique des composants
DE8422370U1 (de) Drehherdofen in Ringbauart zur Wärmebehandlung von Werkstücken

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

17P Request for examination filed

Effective date: 20040803

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 50307651

Country of ref document: DE

Date of ref document: 20070823

Kind code of ref document: P

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20070822

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

ET Fr: translation filed
REG Reference to a national code

Ref country code: HU

Ref legal event code: AG4A

Ref document number: E002096

Country of ref document: HU

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070711

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071211

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070711

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071011

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071022

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070711

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071012

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070711

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070711

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070711

26N No opposition filed

Effective date: 20080414

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070711

BERE Be: lapsed

Owner name: LOI THERMPROCESS G.M.B.H.

Effective date: 20080331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20080311

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20081125

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080331

Ref country code: HU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080312

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080331

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070711

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080311

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070711

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070711

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20100311

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080311

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070711

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20100324

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20100312

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080331

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110311

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111001

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50307651

Country of ref document: DE

Effective date: 20111001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110312