EP0162013B1 - Anwärmofen für zylindrische Güter - Google Patents

Anwärmofen für zylindrische Güter Download PDF

Info

Publication number
EP0162013B1
EP0162013B1 EP85810216A EP85810216A EP0162013B1 EP 0162013 B1 EP0162013 B1 EP 0162013B1 EP 85810216 A EP85810216 A EP 85810216A EP 85810216 A EP85810216 A EP 85810216A EP 0162013 B1 EP0162013 B1 EP 0162013B1
Authority
EP
European Patent Office
Prior art keywords
warming
product
furnace according
longitudinal axis
charge
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
EP85810216A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0162013A2 (de
EP0162013A3 (en
Inventor
Bernhard Hilge
Martin Knoch
Carl Kramer
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.)
Alcan Holdings Switzerland AG
Original Assignee
Schweizerische Aluminium 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 Schweizerische Aluminium AG filed Critical Schweizerische Aluminium AG
Priority to AT85810216T priority Critical patent/ATE46965T1/de
Publication of EP0162013A2 publication Critical patent/EP0162013A2/de
Publication of EP0162013A3 publication Critical patent/EP0162013A3/de
Application granted granted Critical
Publication of EP0162013B1 publication Critical patent/EP0162013B1/de
Expired legal-status Critical Current

Links

Images

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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length
    • 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
    • C21D9/0056—Furnaces through which the charge is moved in a horizontal straight path

Definitions

  • the fans for generating the circulated gas flow are arranged so that the material is not evenly applied to the entire length of the gas flow without additional construction-intensive and pressure-reducing internals, such as baffles; this is due to the one-sided arrangement of the fans.
  • the fans blow off transversely to the longitudinal axis of the material, so that the pressure recovery in the fan housing causes problems.
  • Another disadvantage of this known heating furnace is the use of slot nozzles for convective heating. These slit nozzles arranged along the material produce slit jets, the exit velocity of which runs in different directions to the surface of the material and thus results in an uneven flow of flow and thus an uneven heating around the material.
  • DE-OS-2 929 322 DE-OS-2 712 279, DE-AS-2 637 646 and DE-OS-2 349 765.
  • the invention is therefore based on the object of providing a heating furnace of the type specified, in which the disadvantages mentioned above do not occur.
  • a heating furnace which leads to a precisely defined, uniform heating of the cylindrical material over its entire length and its entire circumference and excludes curvatures caused by different heating.
  • the advantages achieved by the invention are based in particular on the action of the cylindrical goods by the circulated gas flow in a manner which, even with different diameters of the goods, always leads to a symmetrical distribution of the heat transfer over the surface of the goods and over the length of the goods.
  • the cylindrical goods are each held in the heating furnace with a constant, defined axis position; the heat transfer continues Carried by a nozzle field, the nozzle jets are directed exactly radially to the longitudinal axis of the cylindrical material, thereby ensuring stable, defined heat transfer conditions.
  • the exact radial alignment of the impinging jets is in turn achieved by an appropriate design of the flow guide and the flow channel provided with the nozzle openings.
  • the material to be annealed is indicated schematically in the drawings by a cylindrical bolt 1 which is located in a cylindrical treatment room 2.
  • This bolt 1 is shown in FIGS. 6 and 7.
  • Conveying device introduced into the treatment room in the horizontal direction, then centered in the vertical direction in the treatment room by means of a lifting device integrated in the conveying device, held there if required for a predetermined period of time, lowered again and then conveyed out of the treatment room 2.
  • the transport direction of the bolts 1 runs horizontally in the longitudinal direction of the central central or longitudinal axis of the bolts 1.
  • the transport device transports the bolts 1 into the treatment room in such a way that the longitudinal axes of all bolts 1, regardless of their diameter, are held at the same height in the treatment room 2.
  • 4 shows the minimum bolt diameter at 1a and the maximum bolt diameter at 1b. It can be seen that in both cases the longitudinal axis of the bolts 1 a and 1 b lie in the same place.
  • the outer walls of the treatment room 2 are formed by side walls of supply channels 4 for the treatment gas, for example air, which end in nozzle openings 3 in the walls of the treatment room 2.
  • the nozzle openings are arranged in the walls such that the nozzle jets emerging from the nozzle openings 3 are directed exactly radially onto the bolts 1.
  • the points of incidence of the nozzle jets based on the development of the lateral surface of the cylindrical bolts 1, lie in the corner points of equilateral triangles.
  • the side length of these equilateral triangles corresponds approximately to the distance between the nozzle exit surface and the bolt surface, based on the mean bolt diameter.
  • the outlet diameter of the nozzle openings 3 corresponds to approximately one fifth of the average nozzle distance from the surface of the bolts 1.
  • a return flow cross-section 5 is available for outflowing the treatment gas impinging on the bolt 1, above which a fan 6 is arranged. An unimpeded outflow of the treatment gas from the bolt 1 to a suction space 7 can thus take place, which extends almost over the entire length of the bolt 1.
  • the fan 6 conveys the treatment gas symmetrically on both sides in outflow diffusers 8.
  • burners At the end of these outflow diffusers 8, that is to say at the points where the outflow diffusers expand to approximately the width of the system, burners are installed, the flame of which is directed against the outflow from the fan 6, whereby the hot exhaust gases mix very evenly with the treatment gas circulated by the fan 6. Burners can be used for all common fuels. With indirect heating, the radiant tubes and with direct electrical heating, the heating grids are also installed in the flow channel at the end of the outflow diffusers. The subsequent narrowing of the flow channel results in an acceleration, which leads to a uniform speed profile in the inlet area 9 of the feed channels 4 for the nozzle openings 3.
  • the transport device will be described below with reference to Figures 6 and 7.
  • the generally indicated by the reference numeral 12, consisting of conveyor and lifting device has a horizontal, stationary conveyor roller hearth on the rotatable rollers 14 of this roller hearth maintain their vertical height and only serve for the horizontal conveying of the bolts 1 in FIGS from the treatment room 2.
  • the lifting elements are then actuated, as a result of which the frame 16 and thus also the double V-rollers 22 are displaced in the vertical direction upwards until the longitudinal axis of the bolt 1 shown in FIG. 6 coincides with the central axis of the treatment room 2.
  • the double V-rollers 22 are evenly distributed over the length of the bolt 1 and consist of a heat-resistant material. Except for the middle double V-roller, all double V-rollers are pivoted. The, based on the length of the pin 1, the middle double V-roller 22 is stationary, however, so it cannot rotate, which means that when the pin is heated, a uniform thermal expansion on both sides of the pin 1 in the longitudinal direction starts from the center Bolt 1 is guaranteed.
  • the lifting devices of the individual treatment rooms 2 can be operated independently of one another, whereby charging of the individual treatment rooms 2 is possible.
  • the described design of the nozzle openings simplifies the fact that with the same nozzle opening, which can be produced, for example, by appropriate deformation with a printing tool, the desired jet inclination angle is achieved as exactly as possible perpendicular to the axis of the cylindrical bolt 1. In this way, a uniform outflow of the treatment gas from the bolt 1 is also achieved, which in turn leads to a heat transfer evenly distributed over the bolt surface.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Heat Treatment Of Articles (AREA)
  • Drying Of Solid Materials (AREA)
  • General Induction Heating (AREA)
  • Tunnel Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Furnace Details (AREA)
EP85810216A 1984-05-18 1985-05-08 Anwärmofen für zylindrische Güter Expired EP0162013B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85810216T ATE46965T1 (de) 1984-05-18 1985-05-08 Anwaermofen fuer zylindrische gueter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3418603A DE3418603C1 (de) 1984-05-18 1984-05-18 Anwaermofen fuer zylindrische Gueter
DE3418603 1984-05-18

Publications (3)

Publication Number Publication Date
EP0162013A2 EP0162013A2 (de) 1985-11-21
EP0162013A3 EP0162013A3 (en) 1987-04-29
EP0162013B1 true EP0162013B1 (de) 1989-10-04

Family

ID=6236277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85810216A Expired EP0162013B1 (de) 1984-05-18 1985-05-08 Anwärmofen für zylindrische Güter

Country Status (7)

Country Link
US (1) US4620840A (enrdf_load_stackoverflow)
EP (1) EP0162013B1 (enrdf_load_stackoverflow)
JP (1) JPS619514A (enrdf_load_stackoverflow)
AT (1) ATE46965T1 (enrdf_load_stackoverflow)
CA (1) CA1233639A (enrdf_load_stackoverflow)
DE (2) DE3418603C1 (enrdf_load_stackoverflow)
NO (1) NO166289C (enrdf_load_stackoverflow)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2199643B (en) * 1987-01-07 1990-06-20 British Gas Plc Apparatus for heating stock
US5007824A (en) * 1987-08-26 1991-04-16 Sidwell Clarence W Skid mark erasure system
US4936771A (en) * 1987-08-26 1990-06-26 Sidwell Clarence W Skid mark erasure system
US5182073A (en) * 1990-11-01 1993-01-26 Plasma Energy Corporation Apparatus for surface treating metal billets
DE19538364C5 (de) * 1995-10-14 2007-05-24 Carl Prof. Dr.-Ing. Kramer Vorrichtung zur Schnellerwärmung von Metall-Preßbolzen
DE19943354C1 (de) * 1999-09-10 2001-05-23 Carl Kramer Vorrichtung zur gleichmäßigen Schnellerwärmung von Pressbolzen oder Stangen, insbesondere aus Leichtmetalllegierungen
WO2001020052A2 (de) * 1999-09-16 2001-03-22 Honsel Profilprodukte Gmbh Verfahren und anlage zur wärmebehandlung von strangpressprofilen
DE102007062551B4 (de) * 2007-12-20 2012-02-23 Otto Junker Gmbh Vorrichtung und Verfahren zur Erwärmung von Metallbolzen
WO2016020546A1 (en) * 2014-08-08 2016-02-11 I.C.M.I. S.R.L. Heating furnace for metal bars
CN115823883B (zh) * 2022-12-13 2023-10-13 江苏东方成套设备制造集团有限公司 一种加热炉预处理装置

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1872713A (en) * 1927-08-27 1932-08-23 Frank A Fahrenwald Apparatus for heat treating objects
US1834304A (en) * 1927-12-31 1931-12-01 United Eng Foundry Co Heating furnace
US2697860A (en) * 1951-05-08 1954-12-28 Ferro Eng Co Hot top conditioning equipment
GB854359A (en) * 1955-11-04 1960-11-16 Salem Engineering Company Ltd Improvements in, or relating to, furnaces
DE2349765A1 (de) * 1973-10-03 1975-04-10 Elhaus Friedrich W Verfahren und einrichtung zur waermebehandlung von zu behandelndem gut, insbesondere aus aluminium- oder magnesiumlegierungen
US3813212A (en) * 1973-04-23 1974-05-28 Phillips Petroleum Co Rotating flame treater
US3837794A (en) * 1973-07-16 1974-09-24 Granco Equipment Billet heating
US4184839A (en) * 1975-02-07 1980-01-22 Mannesmann Aktiengesellschaft Roller track for pipes
US3994678A (en) * 1975-05-12 1976-11-30 Oliver Machinery Company Heater for billets
CH610010A5 (en) * 1976-03-22 1979-03-30 Elhaus Friedrich W Arrangement for the heat treatment of elongate stock
DE2628657C2 (de) * 1976-06-25 1984-04-26 Otto Junker Gmbh, 5107 Simmerath Temperatur-Ausgleichsofen für im Durchlaufverfahren zu erwärmende metallische Werkstücke
DE2637646B2 (de) * 1976-08-20 1978-08-10 Friedrich Wilhelm Dipl.- Ing. 5600 Wuppertal Elhaus Anwärmofen
IT1203181B (it) * 1978-05-18 1989-02-15 Olivotto Constr Termomecc Forno continuo per il riscaldo di pezzi metallici cilindrici
DE2907960C3 (de) * 1979-03-01 1984-04-19 Elhaus, Friedrich Wilhelm, Dipl.-Ing., 5600 Wuppertal Verfahren und Vorrichtung zum kontinuierlichen Wärmebehandeln von vereinzeltem, langgestrecktem metallischen Gut
DE2929322C2 (de) * 1979-07-19 1984-05-17 Friedrich Wilhelm Dipl.-Ing. 5600 Wuppertal Elhaus Anwärmofen
US4410308A (en) * 1982-01-04 1983-10-18 Mcelroy James G Combustion furnace and burner
DE3203433C2 (de) * 1982-02-02 1984-08-09 Friedrich Wilhelm Dipl.-Ing. 7761 Moos Elhaus Anwärmofen für langgestrecktes Gut
US4481398A (en) * 1982-09-13 1984-11-06 Lavins Paul N Multi-directional oscillating breakoff mechanism for separating billets

Also Published As

Publication number Publication date
NO851948L (no) 1985-11-19
CA1233639A (en) 1988-03-08
EP0162013A2 (de) 1985-11-21
JPH0582450B2 (enrdf_load_stackoverflow) 1993-11-19
DE3573470D1 (en) 1989-11-09
EP0162013A3 (en) 1987-04-29
NO166289C (no) 1991-06-26
DE3418603C1 (de) 1985-03-21
ATE46965T1 (de) 1989-10-15
NO166289B (no) 1991-03-18
JPS619514A (ja) 1986-01-17
US4620840A (en) 1986-11-04

Similar Documents

Publication Publication Date Title
DE4336364C2 (de) Vorrichtung zum Erhitzen oder zum Kühlen von tafelförmigem oder bandförmigem Behandlungsgut aus Glas oder keramischem Werkstoff
EP0162013B1 (de) Anwärmofen für zylindrische Güter
DE1421784B2 (enrdf_load_stackoverflow)
DE2637646A1 (de) Anwaermofen
DE2043808A1 (de) Brennvorrichtung fur Heizgas
DE2601658B2 (de) Kühlvorrichtung für einen an der Ein- und Auslaßseite offenen Durchlaufofen zum Wärmebehandeln von Werkstücken
DE2840096A1 (de) Brennereinheit fuer gasfoermige brennstoffe mit einer minimalen entstehung von stickstoffoxiden
DE2457152A1 (de) Verfahren und vorrichtung zur waermebehandlung von gegenstaenden in einem umwaelzofen
EP0645583A1 (de) Gasbrenner
EP0131955B1 (de) Verfahren zur Wärmebehandlung von zylindrischen Gegenständen, insbesondere Röhren, insbesondere aus keramischem Material, und Durchlaufofen zur Durchführung des Verfahrens
DE1811548A1 (de) Feuerungssystem fuer Durchlaufofen
DE19538364C2 (de) Vorrichtung zur Schnellerwärmung von Metall-Preßbolzen
EP1493718A1 (de) Anlage und Verfahren zur Wärmebehandlung von Glas
EP3517509B1 (de) Vorrichtung und verfahren zum beheizen und transportieren einer glasschmelze
EP0054184B1 (de) Kühlzone für einen Brennofen, vorzugsweise Rollenofen
DE2118589A1 (de) Verfahren und Vorrichtung zum fortlaufenden Umlenken eines Glasbandes in plastischem Zustand
DE7515596U (de) Heizvorrichtung
DE3813441A1 (de) Roststabelement fuer eine schubrostfeuerung zur muellverbrennung
DE3935929C2 (de) Vorrichtung zur Schnellkühlung von zylindrischem Halbzeug
DE3144146C1 (de) Schnellerwärmungsofen
DE3827267A1 (de) Begasungseinrichtung fuer waermebehandlungsanlagen mit schutz- oder reaktionsgasbetrieb
DE2315459A1 (de) Ofen zur waermebehandlung von gegenstaenden
DE19943354C1 (de) Vorrichtung zur gleichmäßigen Schnellerwärmung von Pressbolzen oder Stangen, insbesondere aus Leichtmetalllegierungen
DD156391A1 (de) Durchlaufofen mit schlittenfoerderung,insbesondere fuer den einsinkfarbenbrand
DE1421784C (de) Verfahren zum Übertragen von Warme zwischen einer Glastafel und einem Gas

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

Designated state(s): AT CH DE FR GB IT LI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19871013

17Q First examination report despatched

Effective date: 19881012

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR GB IT LI

REF Corresponds to:

Ref document number: 46965

Country of ref document: AT

Date of ref document: 19891015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3573470

Country of ref document: DE

Date of ref document: 19891109

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

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940421

Year of fee payment: 10

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

Ref country code: GB

Effective date: 19950508

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

Ref country code: DE

Payment date: 19950623

Year of fee payment: 11

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

Effective date: 19950508

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

Ref country code: FR

Payment date: 19960506

Year of fee payment: 12

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

Ref country code: AT

Payment date: 19960510

Year of fee payment: 12

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

Ref country code: DE

Effective date: 19970201

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

Ref country code: AT

Effective date: 19970508

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: 19980130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: CH

Payment date: 20000530

Year of fee payment: 16

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: 20010607

Ref country code: CH

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

Effective date: 20010607

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL