EP0514324A2 - Dispositif de refroidissement - Google Patents

Dispositif de refroidissement Download PDF

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Publication number
EP0514324A2
EP0514324A2 EP92810307A EP92810307A EP0514324A2 EP 0514324 A2 EP0514324 A2 EP 0514324A2 EP 92810307 A EP92810307 A EP 92810307A EP 92810307 A EP92810307 A EP 92810307A EP 0514324 A2 EP0514324 A2 EP 0514324A2
Authority
EP
European Patent Office
Prior art keywords
plates
hollow chamber
small parts
cooling
heat
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.)
Withdrawn
Application number
EP92810307A
Other languages
German (de)
English (en)
Other versions
EP0514324A3 (en
Inventor
Eckart Droessler
Rainer Batliner
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP0514324A2 publication Critical patent/EP0514324A2/fr
Publication of EP0514324A3 publication Critical patent/EP0514324A3/de
Withdrawn legal-status Critical Current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
    • C21D1/34—Methods of heating
    • C21D1/53—Heating in fluidised beds
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/92—Particulate heat exchange

Definitions

  • the invention relates to a device for cooling small parts between a hardening furnace and a quenching bath.
  • austenite For hardening, steels are heated to such a high temperature that the pearlite is safely converted into austenite.
  • the body-centered cubic crystal lattice of the ferrite folds into the face-centered cubic crystal lattice of austenite.
  • the resulting structure is called austenite. It is soft, tough and non-magnetic and forms pointed corners.
  • a whirl bath When hardening small parts, a whirl bath can be used as a quenching bath by additionally coating the parts with a surface.
  • the hot small parts coming from the heat treatment station such as bolts or nails are z. B. fed to a fluidized bed in which there is fluidized powder.
  • the heat content of the small parts when immersed in the fluidized bed is decisive for the thickness of the melting layer.
  • the invention has for its object to provide a device with which the temperature of the small parts falling into the fluidized bed and thus the coating thickness can be controlled.
  • the object is achieved by a hollow chamber which is open at the end, in which plates are arranged one behind the other and offset relative to the hollow chamber wall, the angle of inclination of the plates, measured relative to the hollow chamber wall, being adjustable and the plates being thermally conductive.
  • the hot small parts such as bolts or nails coming out of the hardening furnace and contacting the plates can be cooled or their temperature stabilized before they reach the quenching bath, for example in the form of a fluidized bed.
  • the cooling or temperature stabilization can be determined by the number of plates to be contacted and by the falling speed of the small parts falling through the hollow chamber.
  • the drop-through speed can be controlled by adjusting the angle of inclination of the plates.
  • the plates advantageously have a device for heat regulation.
  • the temperature of the plates and the temperature inside the hollow chamber can thus be controlled.
  • the device for heat regulation is expediently designed as a tube serving to pass through a medium. In this way, an economical connection of the plates with the device for heat regulation is achieved.
  • the cooling and the heat content of the small parts were determined via the parameters "Fall time of the parts through the hollow chamber” and the "Temperature of the plates”.
  • the device for heat regulation is advantageously arranged on the side facing away from the contacting area of the plates.
  • the device required for heat regulation is arranged on the side facing away from the contacting area of the plates. Touching and thus possible damage to the heat regulating device by the parts is thus prevented.
  • FIG. 1 shows a plant in which heat treatment with subsequent coating of small parts can take place.
  • the structure of the plant is essentially step-like.
  • the hardening furnace 9 with the hardening chamber 9a is arranged in height via a supporting frame 10.
  • the multi-link chain is tensioned by means of tensioning rollers 8a.
  • the drive takes place via the drive unit 8b.
  • the small parts leaving the hardening furnace 9 have a very high temperature when they fall into a cooling device 1 in the form of a hollow chamber. After leaving the cooling device 1, the small parts get into a rotary valve 13, the z. B. seals a quench bath 11d in the form of a fluidized bed against the hardening furnace 9. Volatile parts of the quench bath 11d located in a retort 11 could otherwise get into the hardening furnace 9 and damage it.
  • powder is converted into a fluidized state by means of an inflowing gas, so that a fluidized bed is created which serves as a quenching bath 11d.
  • the small parts coming from the hardening furnace 9 and falling through the cooling device 1 are coated in the fluidized bed with a thin layer.
  • the small parts are transported within the fluidized bed via an obliquely arranged drum 11a, which has a transport spiral (not shown) for the small parts inside.
  • the small parts transported to the outlet-side end 11c thus come out of the retort 11 and fall onto a conveyor belt 12 which transports the small parts away.
  • FIG. 2 shows, on an enlarged scale compared to FIG. 1, the cooling device 1 in the form of a hollow chamber in which a plurality of plates 3 are arranged.
  • a device 4 for temperature regulation in the form of these a pipe 4b through which the heating or cooling medium 4a can flow.
  • the tubes 4b are arranged on the side of the plates 3 facing away from the contact area 3a such that they cannot be damaged by the small parts falling on the plates.
  • the throughput time of the small parts through the cooling device 1 can be achieved by the adjustable inclination of the plates 3. Depending on the set inclination a of the plates 3, these have different distances from the side walls of the hollow chamber. So that no small parts can fall through or hang in this area, spring plates 4c are fastened to the side walls, each of which adapt to the set inclination a of the plates 3 and thus form a corresponding transition. Ten plates 3 are preferably arranged in the hollow chamber of the cooling device 1. The number of plates 3 is to be matched to the respective application.
  • FIG. 3 shows a section of the device 4 for temperature regulation.
  • the tubes 4b arranged on the back of the plates 3 are of serpentine design.
  • the connection to the plates 3 can be made mechanically in a heat-conducting manner by means of a soldered, adhesive, screwed, riveted or welded connection.
  • a liquid serves as the heating or cooling medium 4a, the temperature of which is stabilized by means of a heat exchanger and the flow rate.
  • the temperature can also be regulated by means of other cooling or heating elements which are produced by casting, pressing, deep drawing, welding, screwing or gluing.

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)
  • Tunnel Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Furnace Details (AREA)
EP19920810307 1991-05-17 1992-04-28 Cooling apparatus Withdrawn EP0514324A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4116216A DE4116216A1 (de) 1991-05-17 1991-05-17 Abkuehlstrecke
DE4116216 1991-05-17

Publications (2)

Publication Number Publication Date
EP0514324A2 true EP0514324A2 (fr) 1992-11-19
EP0514324A3 EP0514324A3 (en) 1993-09-01

Family

ID=6431911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920810307 Withdrawn EP0514324A3 (en) 1991-05-17 1992-04-28 Cooling apparatus

Country Status (5)

Country Link
US (1) US5345997A (fr)
EP (1) EP0514324A3 (fr)
JP (1) JPH05132711A (fr)
DE (1) DE4116216A1 (fr)
FI (1) FI922196L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1207211A3 (fr) * 2000-11-15 2004-02-04 Four Electrique Delémont S.A. Dispositif de traitement thermique de pièces métalliques

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5802858A (en) * 1997-03-27 1998-09-08 Praxair Technology, Inc. Cryogenic cooling tower
US9316427B2 (en) * 2011-03-02 2016-04-19 Whirlpool Corporation Direct contact icemaker with chambered air cooling system
CN105345795A (zh) * 2015-11-23 2016-02-24 苏州富瑞合金科技股份有限公司 一种铜锭储藏架

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US137459A (en) * 1873-04-01 Improvement in sugar-driers
US408660A (en) * 1889-08-06 Drying or evaporating apparatus
US217053A (en) * 1879-07-01 Improvement in grain steamer and drier
US159014A (en) * 1875-01-26 Improvement in grain-driers
US789807A (en) * 1904-05-31 1905-05-16 Franz Holl Apparatus for cooling and drying granular materials.
US945089A (en) * 1909-09-13 1910-01-04 George M Heath Wheat-heater.
US1414180A (en) * 1920-02-24 1922-04-25 Gen Electric Heat-treating furnace
US1424904A (en) * 1921-10-01 1922-08-08 Frank X Heindl Sand-drying device
US1816236A (en) * 1929-01-28 1931-07-28 Shuyler Reynold Apparatus for cooling and conditioning grain
US2074029A (en) * 1932-07-11 1937-03-16 Schulman Joseph Method and means for preparing foods and the like which require roasting
US2317003A (en) * 1941-09-18 1943-04-20 Vissac Gustave Andre Drying apparatus
US2494361A (en) * 1945-08-28 1950-01-10 Gen Electric Liquid treating apparatus
GB921593A (en) * 1961-01-30 1963-03-20 Simonacco Ltd Improvements in thermal dryers of the cascade type
DE1501461A1 (de) * 1965-01-08 1969-04-03 Burbach Kaliwerke Ag Verfahren zum indirekten Kuehlen von Stoffen mit Wasser im Gegenstrom
GB1164283A (en) * 1965-10-21 1969-09-17 Dorr Oliver Inc Heat-Exchange Apparatus.
DE1583354B1 (de) * 1967-09-12 1970-12-23 Degussa Vorrichtung zum Abschrecken von Werkstuecken in Wasser oder waessrigen Loesungen
US3531096A (en) * 1967-09-12 1970-09-29 Degussa Apparatus for quenching workpieces
US3565409A (en) * 1968-04-12 1971-02-23 Btu Eng Corp Heat-treating apparatus
GB1344513A (en) * 1971-04-22 1974-01-23 Clarke Built Ltd Ap V Freezing or thawing apparatus
FR2193687B1 (fr) * 1972-07-26 1978-03-10 Burdin Jacques
US3841836A (en) * 1972-08-10 1974-10-15 Eastman Kodak Co Apparatus for the production of condensation polymers
US4515629A (en) * 1981-02-12 1985-05-07 United Technologies Corporation Degassing metal powder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1207211A3 (fr) * 2000-11-15 2004-02-04 Four Electrique Delémont S.A. Dispositif de traitement thermique de pièces métalliques

Also Published As

Publication number Publication date
US5345997A (en) 1994-09-13
FI922196A7 (fi) 1992-11-18
EP0514324A3 (en) 1993-09-01
DE4116216A1 (de) 1992-11-19
JPH05132711A (ja) 1993-05-28
FI922196A0 (fi) 1992-05-14
FI922196L (fi) 1992-11-18

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