EP0198871B1 - Verfahren und vorrichtung zur wärmebehandlung, insbesondere zur einsatzhärtung - Google Patents

Verfahren und vorrichtung zur wärmebehandlung, insbesondere zur einsatzhärtung Download PDF

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Publication number
EP0198871B1
EP0198871B1 EP19850905124 EP85905124A EP0198871B1 EP 0198871 B1 EP0198871 B1 EP 0198871B1 EP 19850905124 EP19850905124 EP 19850905124 EP 85905124 A EP85905124 A EP 85905124A EP 0198871 B1 EP0198871 B1 EP 0198871B1
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EP
European Patent Office
Prior art keywords
furnace
heat treatment
articles
installation
ring
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
Application number
EP19850905124
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English (en)
French (fr)
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EP0198871A1 (de
Inventor
Tomas Barkman
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.)
Volvo AB
Original Assignee
Volvo AB
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20357207&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0198871(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Volvo AB filed Critical Volvo AB
Priority to AT85905124T priority Critical patent/ATE39949T1/de
Publication of EP0198871A1 publication Critical patent/EP0198871A1/de
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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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • 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 present invention relates to a method of heat treatment, especially case-hardening, of articles with varying requirements as to heat treatment time.
  • the invention also relates to a heat treatment installation particularly suited to carrying out said method.
  • the purpose of the present invention is to achieve a method which makes it possible to better utilize available capacity by making it possible to treat at the same time articles which are to have differing carbonization depths.
  • An installation particularly suited to carrying out the method according to the invention comprises a ring furnace known per se with a rotatable carrier for the articles and is characterized in that the discharge opening from a separate heating-up furnace is connected directly to the input opening of the ring furnace.
  • all the articles are heated in the heating-up furnace to the heat treatment temperature of the heat treatment furnace.
  • the articles to be heat-treated for 1.5 hours can be inserted into the heat treatment furnace after the articles to be treated for 3.5 hours, and be taken out before these, without requiring a change in the temperature or atmosphere of the heat treatment furnace.
  • a ring furnace this can be done quite simply.
  • Each article is time-monitored, preferably via a computer system, and is advanced to the exit point from the ring furnace after heat treatment has been completed.
  • 1 designates a feeding station for articles to be case-hardened.
  • the articles are placed on metal skidding pallets 2, on which the articles are then transported through the installation.
  • the pallets are transferred to a conveyor 4 and are conveyed thereon through a washing station 5 and back to the conveyor 3 via a conveyor 6, and from there to a conveyor 7, by means of which the skidding pallets 2 are fed into the heat treatment furnace 8.
  • the pallets are advanced to a heating up furnace 9, in which the articles are heated up to their heat treatment temperature, e. g. ca 900 °C.
  • the heating-up furnace 9 is attached directly to a ring furnace 10, in which the pallets after heating of the articles are placed on a turn-table (as is indicated by the arrows in the figure). Regardless of the order in which the pallets are fed into the furnace 10, anyone of the pallets can now be removed by virtue of the fact that the turn-table can be advanced as many steps as are desired in either direction in order to place the selected pallet at the outlet 11 of the furnace 10.
  • the articles are transferred to a diffusion furnace 12 and from there either directly to a packing robot 13 or to an oil bath 14. From the oil bath 14, the articles are conveyed via conveyors 3 and 4 once again through the washing station 5 and finally to a tempering furnace 15, from which the articles are conveyed out to the conveyor 3.
  • the heat treatment installation shown and described is suitably controlled by a computerized control system which keeps track of where each individual pallet is at each moment and times the various operations, so that all of the articles receive the proper heat treatment period independently of the order in which they are fed into the installation.

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  • 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)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (3)

1. Verfahren zur Wärmebehandlung, insbesondere Einsatzhärtung von verschiedene Wärmebehandlungszeiten benötigenden Gegenständen, dadurch gekennzeichnet, daß mehrere Gegenstände zur gleichen Zeit in einem gesonderten Aufwärmofen (9) auf eine vorbestimmte Temperatur aufgewärmt werden, daß die Gegenstände danach in einen Wärmebehandlungsofen (10) eingebracht und in ihm für die Wärmebehandlung belassen werden, daßdie Verweilzeit im Wärmebehandlungsofen für jeden Gegenstand individuell überwacht wird und daß die Gegenstände nach einer vorbestimmten Verweilzeit für sich unabhängig von der Reihenfolge ihrer Einbringung aus dem Ofen entnommen werden.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Gegenstände nach dem Aufwärmen auf einen drehbaren Träger in einem Ringofen (10) gesetzt werden und daß jeder Gegenstand, wenn die Verweilzeit abgelaufen ist, durch Drehen des Trägers zu einer Ausstoßöffnung des Ofens verbracht wird.
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Gegenstände nach der Wärmebehandlung im Ringofen (10) in einen Diffusionsofen (12) eingesetzt werden, der unmittelbar mit dem Ringofen verbunden ist.
EP19850905124 1984-10-02 1985-09-30 Verfahren und vorrichtung zur wärmebehandlung, insbesondere zur einsatzhärtung Expired EP0198871B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85905124T ATE39949T1 (de) 1984-10-02 1985-09-30 Verfahren und vorrichtung zur waermebehandlung, insbesondere zur einsatzhaertung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8404926A SE450389B (sv) 1984-10-02 1984-10-02 Metod och anleggning for vermebehandling av detaljer med varierande krav pa vermebehandlingstid
SE8404926 1984-10-02

Publications (2)

Publication Number Publication Date
EP0198871A1 EP0198871A1 (de) 1986-10-29
EP0198871B1 true EP0198871B1 (de) 1989-01-11

Family

ID=20357207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850905124 Expired EP0198871B1 (de) 1984-10-02 1985-09-30 Verfahren und vorrichtung zur wärmebehandlung, insbesondere zur einsatzhärtung

Country Status (5)

Country Link
EP (1) EP0198871B1 (de)
JP (1) JPS62500529A (de)
DE (1) DE3567479D1 (de)
SE (1) SE450389B (de)
WO (1) WO1986002104A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19635257C1 (de) * 1996-08-30 1998-03-12 Franz Hillingrathner Rundtaktofen zum Behandeln von Werkstücken
US5997290A (en) * 1996-08-30 1999-12-07 Hillingrathner; Franz Revolving transfer furnace for treating workpieces

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3441338A1 (de) * 1984-11-13 1986-05-15 Ipsen Industries International Gmbh, 4190 Kleve Verfahren zur waermebehandlung metallischer werkstuecke unter verwendung eines durchlauf- oder durchstossofens sowie vorrichtung zum durchfuehren dieses verfahrens
DE3640325C1 (de) * 1986-11-26 1988-02-04 Ipsen Ind Internat Gmbh Vorrichtung zur Waermebehandlung metallischer Werkstuecke in einer Kohlungsatmosphaere
US5187670A (en) * 1990-11-05 1993-02-16 Caterpillar Inc. Control system for scheduling parts in a heat-treating process
DE29505496U1 (de) * 1995-03-31 1995-06-01 Ipsen Industries International GmbH, 47533 Kleve Vorrichtung zur Wärmebehandlung metallischer Werkstücke unter Vakuum
PL2186916T3 (pl) * 2008-11-17 2014-03-31 Loi Thermprocess Gmbh Sposób i instalacja do ciągłego hartowania powierzchniowego

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2013905A (en) * 1933-02-04 1935-09-10 Jr James L Adams Circular ingot heating furnace
DE971225C (de) * 1943-10-13 1958-12-31 Aeg Drehherdofen mit angeschlossener Kuehlkammer
DE1201380B (de) * 1958-05-07 1965-09-23 Lee Wilson Verfahren und Vorrichtung zur Waerme-behandlung von aufgelockerten Metallbandspulen
US3112918A (en) * 1961-03-28 1963-12-03 Salem Brosius Inc Rotary hearth furnace control
CA980040A (en) * 1971-09-07 1975-12-16 John P. Stallings Homogeneously colored low profile unsaturated polyester moldings and preparations thereof
US3779697A (en) * 1972-02-28 1973-12-18 Morgan Construction Co Means and method of heating and handling large coiled billet rod for metal rolling
JPS58217625A (ja) * 1982-06-09 1983-12-17 Daido Steel Co Ltd 熱処理装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19635257C1 (de) * 1996-08-30 1998-03-12 Franz Hillingrathner Rundtaktofen zum Behandeln von Werkstücken
US5997290A (en) * 1996-08-30 1999-12-07 Hillingrathner; Franz Revolving transfer furnace for treating workpieces

Also Published As

Publication number Publication date
SE450389B (sv) 1987-06-22
DE3567479D1 (en) 1989-02-16
SE8404926L (sv) 1986-04-03
EP0198871A1 (de) 1986-10-29
SE8404926D0 (sv) 1984-10-02
JPS62500529A (ja) 1987-03-05
WO1986002104A1 (en) 1986-04-10

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