EP2387622B1 - Dispositif et procédé de trempe - Google Patents

Dispositif et procédé de trempe Download PDF

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Publication number
EP2387622B1
EP2387622B1 EP09765082.4A EP09765082A EP2387622B1 EP 2387622 B1 EP2387622 B1 EP 2387622B1 EP 09765082 A EP09765082 A EP 09765082A EP 2387622 B1 EP2387622 B1 EP 2387622B1
Authority
EP
European Patent Office
Prior art keywords
quenching
rotor
drive motor
gas
chamber
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.)
Active
Application number
EP09765082.4A
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German (de)
English (en)
Other versions
EP2387622A1 (fr
Inventor
Bernhard Mueller
Michael Loercher
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2387622A1 publication Critical patent/EP2387622A1/fr
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Publication of EP2387622B1 publication Critical patent/EP2387622B1/fr
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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
    • C21D1/56—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

Definitions

  • the invention relates to a quenching device for quenching Abschreckgut, in particular of metallic workpieces, with quenching gas according to the preamble of claim 1 and a quenching method for quenching Abschreckgut, especially of metallic workpieces, with quenching gas according to the preamble of claim.
  • the most metallic workpieces are subjected to a heat treatment.
  • the speed with which the workpieces are cooled after being previously heated is the speed with which the workpieces are cooled after being previously heated.
  • quenching gases instead of quenching liquids is that the quenched material does not need to be cleaned after quenching, and that a higher quench homogeneity in the batch can be achieved.
  • a quenching device used for a previously described quenching process is, for example, in US Pat EP 1 154 024 B1 described.
  • the known device comprises a space which can be flooded with quenching gas and which is formed by a quenching chamber for receiving the quenching material and by a flow channel for forming a quenching gas flow circuit.
  • the quenching chamber is not loaded and unloaded in the quenching gas flooded state, but usually under vacuum.
  • the known quenching device is to form a Abschreckgasströmung within the flow channel an impeller, which by means of a is driven outside of the floodable with quenching gas space arranged electric motor. Since a motor shaft of the drive motor passes through an outer wall of the flow channel, a great constructional effort is required to achieve a hermetic tightness of the quenchable with flooding gas space.
  • the drive motor In alternative, known quenching devices, the drive motor, together with the impeller, is disposed within the quenchable gas flooding chamber to prevent leaks.
  • the drive motor can not be started in a vacuum, otherwise in the winding of the drive motor electrical flashovers (arcs) may occur, which could destroy the drive motor.
  • This is problematic in that the high-performance blowers necessary to increase the quench rate require long start-up times compared with the actual quench time to reach the rated speed. Since the starting of the drive motor can not already be started during the loading of the quenching chamber under a vacuum atmosphere, but only after it has been flooded with quenching gas, the total starting time is added to the actual quenching time, which has a negative effect on the number of cycles to be achieved.
  • the described disadvantage results in a slower quenching of the quenched material compared to the quenching of liquids, since there the maximum quenching intensity is available immediately after immersing a quenchable batch in the liquid bath.
  • the reduced quenching speed in known quenching devices with drive motors arranged within the space to be flooded has an effect not only on the cycle time but also on the quality of the workpiece structure and thus on the component properties due to the extended quenching time.
  • the invention has for its object to propose a quenching, are avoided on the one hand tightness problems and on the other a starting of the powerful drive motor for the fan even before the flooding of the room with quenching gas, especially at vacuum acted space is possible. Furthermore, the object is to provide a method which allows operation of the fan drive motor regardless of the atmosphere in the space having the impeller.
  • the invention has recognized that an operation of, preferably designed as a standard electric motor, drive motor for the at least one impeller regardless of the atmosphere and the pressure conditions in the impeller receiving space is given only when the drive motor is outside of this space. Since in the prior art, the motor shaft of the drive motor passes through the room wall, sealing problems are inevitably given in the prior art. To circumvent this problem, the invention proposes not mechanically to couple the drive motor as in the prior art with the impeller, but contactless. In other words, a coupling is assigned to the drive motor and the impeller, which is designed such that with this contactless torque from the drive motor to the impeller is transferable. As a result, it is not necessary for mechanical components of the drive train to penetrate the room wall, which in turn prevents leakage problems.
  • a further advantage of a quenching device designed according to the concept is that it does not have to use specially sealed motors, but rather to use comparatively inexpensive standard electric motors. Quite particularly preferred is an embodiment of the quenching device, wherein the coupling, with which a drive torque from the drive motor is transferable to the impeller, is designed as a magnetic coupling, with a torque transmission through the wall of the space is possible.
  • the magnetic coupling has a first runner mechanically connected to the drive motor, preferably to a motor shaft of the drive motor, and a second runner which is driveably drivable by the first runner and mechanically connected to the blower wheel, the second runner together is arranged with the impeller in the space floatable with quenching gas.
  • the rotor which is mechanically coupled to the drive motor, is an internal rotor, which is enclosed radially on the outside by the second contactlessly driven rotor and is set into rotary motion by the rotationally moved magnetic field.
  • the second, that is, the non-contact driven rotor is an internal rotor, which is enclosed radially outside of the first rotor (external rotor).
  • the latter embodiment is the preferred variant.
  • the impeller is located directly in the quenching chamber, ie in the directly be charged with Abschreckgut space.
  • the fan is arranged in a flow channel which is fluidically connected to the quenching chamber.
  • the provision of a flow channel is optional, i. It is also an embodiment of the quenching device as a quenching cell without flow channel feasible, so an embodiment in which the quenching gas is circulated exclusively in the quenching cell by means of the blower.
  • the quenching device wherein said means for flooding the impeller having space with quenching gas.
  • the means in this case comprise a gas feed line, which opens into the room, wherein the feed line is fed by a quench gas filled with pressure tank.
  • means for evacuating the quenching device are provided.
  • these are designed such that the quenching space, compared with the environment, can be assigned with negative pressure, so that a vacuum can be generated in the room.
  • a heat exchanger is arranged in the space containing the impeller, which is acted upon by the quenching gas circulated by means of the impeller and specifically removes heat therefrom.
  • the invention also provides a method of quenching quench material, particularly metallic workpieces, with quench gas using a quenching device, preferably a quenching device as described above.
  • the quenching gas is accelerated by means of the impeller to realize a good heat transfer between the quench and the quenching gas.
  • the core of the method according to the invention is that the impeller is driven by the drive motor without contact, in particular using a magnetic coupling. This embodiment makes it possible to transmit the torque through a wall and thus to arrange the drive motor outside of the space having the impeller.
  • the drive motor is already started and / or operated while the space is not (yet) flooded with quenching gas. This is possible with a non-sealed standard propulsion engine only when the propulsion engine is not in the flooded space.
  • a possible embodiment of a quenching device 1 is shown.
  • the quenching device 1 comprises in the embodiment shown a single space 2, which can be flooded with quenching gas.
  • a floodable Space in the form of a flow channel, like this in the EP 1 154 024 B1 is shown does not exist, but can be provided if necessary.
  • the space 2 has a pressure-tight closable feed door 3, through which the space 2 (here quenching space) can be charged with quenched material 4.
  • the Abschreckgut 4 existing in the illustrated embodiment of steel workpieces is this arranged on a charging frame 5, which is transportable by means of suitable transport devices under a vacuum atmosphere into the room 2 and then after the quenching process out of this again.
  • a valve 8 preferably automatically, must be opened.
  • the pressure in the space 2 after flooding with quenching gas is about 20bar.
  • an impeller 9 (fan wheel) is rotatably mounted, wherein the impeller 9 is disposed on the end side of a shaft 10, which carries a second rotor 11 (here internal rotor) of a magnetic coupling 12 at the opposite end.
  • the shaft 10 protrudes with the second rotor 11 into a protuberance 13 of the space 2, which is radially outside of a first rotor 14 (here external rotor) of the magnetic coupling 12 radially outwardly enclosed.
  • the first rotor 14 is arranged with (radial) distance to the second rotor 11 and transmits a torque without contact through the wall 16 of the room 2, more precisely through the wall 16 of the protuberance 13 of the space 2, while the drive motor 15 on the second rotor 11, which rotates in the sequence, whereby the impeller 9 is set in a rotational movement.
  • the first rotor 14 is rotationally fixed end on a motor shaft 17 of the drive motor designed as a standard electric motor 15. It is essential that the drive motor 15 is disposed outside the wall 16 of the space 2, ie preferably in a normal air atmosphere, so that the drive motor 15 can be operated independently of the room atmosphere and the internal chamber pressure.
  • a heat exchanger 18 is arranged, which extracts the, by means of the impeller 9, unscaled quenching gas heat.
  • the loading door 3 is opened and the charging frame 5 with the Abschreckgut 4 is introduced into the, preferably under vacuum, space 2.
  • the drive motor 15 is already started during the charging.
  • the space 2 is flooded with quenching gas via the Abschreckgaszutechnisch 6 to quenching pressure.
  • the drive motor 15 and, consequently, the fan wheel 9 have already run up to rated speed at the end of the flooding process, so that the full quenching intensity is available immediately after completion of the flooding process.
  • the quenching gas is discharged into the environment or fed back via a compressor, not shown, in the compressed gas tank 7 and the loading door 3 is removed for removal of the charging frame 5 with quenched quenched material 4. Thereafter, the admission of the space 2 preferably takes place with vacuum.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Heat Treatment Of Articles (AREA)
  • Furnace Details (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (10)

  1. Dispositif de trempe, comprenant au moins un espace (2) pouvant être rempli de gaz de trempe, présentant une roue de soufflante (9) pour la circulation de gaz de trempe, en particulier un espace de trempe et/ou un canal d'écoulement, un moteur d'entraînement (15), disposé à l'extérieur de l'espace (2), pour l'entraînement de la soufflante, étant associé à la roue de soufflante (9),
    caractérisé en ce que
    le moteur d'entraînement (15) est accouplé à la roue de soufflante (9) par transmission de couple par le biais d'un embrayage fonctionnant sans contact.
  2. Dispositif de trempe selon la revendication 1,
    caractérisé en ce que
    l'embrayage est réalisé sous forme d'embrayage magnétique (12).
  3. Dispositif de trempe selon la revendication 2,
    caractérisé en ce que
    l'embrayage magnétique (12) présente un premier rotor (14) connecté mécaniquement au moteur d'entraînement (15) et un deuxième rotor (11) pouvant être entraîné sans contact par le premier rotor (14), connecté mécaniquement à la roue de soufflante (9).
  4. Dispositif de trempe selon la revendication 3,
    caractérisé en ce que
    le premier rotor (14) est réalisé sous forme de rotor extérieur entourant radialement à l'extérieur le deuxième rotor (11) réalisé sous forme de rotor intérieur.
  5. Dispositif de trempe selon la revendication 3,
    caractérisé en ce que
    le deuxième rotor (11) est réalisé sous forme de rotor extérieur entourant radialement à l'extérieur le premier rotor (14) réalisé sous forme de rotor intérieur.
  6. Dispositif de trempe selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'un produit de trempe (4) peut être disposé dans l'espace (2) présentant la roue de soufflante (9).
  7. Dispositif de trempe selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    des moyens sont prévus pour remplir l'espace (2) avec du gaz de trempe.
  8. Dispositif de trempe selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'un échangeur de chaleur (18) est disposé dans l'espace (2).
  9. Procédé de trempe de produits de trempe (4), en particulier de pièces métalliques, avec du gaz de trempe, en utilisant un dispositif de trempe (1), de préférence selon l'une quelconque des revendications précédentes, du gaz de trempe étant mis en circulation avec une roue de soufflante (9) entraînée par un moteur d'entraînement (15),
    caractérisé en ce que
    la roue de soufflante (9) est entraînée sans contact par le moteur d'entraînement (15).
  10. Procédé selon la revendication 9,
    caractérisé en ce que
    le moteur d'entraînement (15) est mis en route ou entraîné alors que l'espace (2) n'est pas encore rempli avec du gaz de trempe.
EP09765082.4A 2009-01-14 2009-12-02 Dispositif et procédé de trempe Active EP2387622B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009000200A DE102009000200B3 (de) 2009-01-14 2009-01-14 Abschreckvorrichtung sowie Abschreckverfahren
PCT/EP2009/066202 WO2010081587A1 (fr) 2009-01-14 2009-12-02 Dispositif et procédé de trempe

Publications (2)

Publication Number Publication Date
EP2387622A1 EP2387622A1 (fr) 2011-11-23
EP2387622B1 true EP2387622B1 (fr) 2016-08-31

Family

ID=41647131

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09765082.4A Active EP2387622B1 (fr) 2009-01-14 2009-12-02 Dispositif et procédé de trempe

Country Status (7)

Country Link
US (1) US20120067467A1 (fr)
EP (1) EP2387622B1 (fr)
JP (1) JP2012515262A (fr)
CN (1) CN102282271A (fr)
BR (1) BRPI0922762A2 (fr)
DE (1) DE102009000200B3 (fr)
WO (1) WO2010081587A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3001229B1 (fr) * 2013-01-23 2015-10-30 Ecm Technologies Cellule de trempe sous gaz
CN104180671B (zh) * 2014-09-01 2016-06-08 浙江尚鼎工业炉有限公司 一种循环式空气预热装置及方法
JP6475084B2 (ja) * 2015-05-21 2019-02-27 臼井国際産業株式会社 トルクセンサ用シャフトの製造設備およびその製造方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2844843C2 (de) * 1978-10-14 1985-09-12 Ipsen Industries International Gmbh, 4190 Kleve Industrieofen zur Wärmebehandlung metallischer Werkstücke
JPS6160819A (ja) * 1984-08-29 1986-03-28 Shimadzu Corp 焼入れ冷却方法
JPS63149314A (ja) * 1986-12-10 1988-06-22 Daido Steel Co Ltd 熱処理炉
US4993841A (en) * 1987-02-05 1991-02-19 Steridose Systems Ab Magnetic impeller means for a mixing vessel
DE4121277C2 (de) * 1991-06-27 2000-08-03 Ald Vacuum Techn Ag Vorrichtung und Verfahren zur selbsttätigen Überwachung der Betriebssicherheit und zur Steuerung des Prozeßablaufs bei einem Vakuum-Wärmebehandlungsofen
US5470152A (en) * 1993-02-23 1995-11-28 General Signal Corporation Radially mounted magnetic coupling
JP3596930B2 (ja) * 1995-02-17 2004-12-02 株式会社島津製作所 急冷炉
CH690857A5 (de) * 1995-07-04 2001-02-15 Erich Bergmann Anlage zur plasmaunterstützten physikalischen Hochvakuumbedampfung von Werkstücken mit verschleissfesten Schichten und Verfahren zur Durchführung in dieser Anlage
EP1154024B1 (fr) * 2000-04-14 2004-03-24 Ipsen International GmbH Procédé et dispositif pour le traitement thermique de pièces métalliques
JP2005269709A (ja) * 2004-03-16 2005-09-29 Maguneo Giken:Kk 磁気回転伝達装置及び密閉撹拌装置
WO2005123970A1 (fr) * 2004-06-15 2005-12-29 Narasimhan Gopinath Procédé et dispositif pour le durcissement de pièces métalliques
JP3125138U (ja) * 2006-06-28 2006-09-07 エジソンハード株式会社 熱処理炉

Also Published As

Publication number Publication date
CN102282271A (zh) 2011-12-14
EP2387622A1 (fr) 2011-11-23
US20120067467A1 (en) 2012-03-22
WO2010081587A1 (fr) 2010-07-22
BRPI0922762A2 (pt) 2016-01-05
JP2012515262A (ja) 2012-07-05
DE102009000200B3 (de) 2010-09-02

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