EP1065287A1 - Wärmebehandlungsanlage mit mindestens einem Muffelofen - Google Patents

Wärmebehandlungsanlage mit mindestens einem Muffelofen Download PDF

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Publication number
EP1065287A1
EP1065287A1 EP00810487A EP00810487A EP1065287A1 EP 1065287 A1 EP1065287 A1 EP 1065287A1 EP 00810487 A EP00810487 A EP 00810487A EP 00810487 A EP00810487 A EP 00810487A EP 1065287 A1 EP1065287 A1 EP 1065287A1
Authority
EP
European Patent Office
Prior art keywords
pot
oven
installation
pots
installation according
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Withdrawn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
EP00810487A
Other languages
English (en)
French (fr)
Inventor
Thierry Spérisen
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.)
Patherm SA
Original Assignee
Patherm SA
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 Patherm SA filed Critical Patherm SA
Publication of EP1065287A1 publication Critical patent/EP1065287A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D5/0068—Containers
    • 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
    • C21D9/0043—Muffle furnaces; Retort furnaces
    • 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
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • F27B17/0016—Chamber type furnaces
    • F27B2017/0091—Series of chambers, e.g. associated in their use

Definitions

  • the present invention relates to a heat treatment installation for parts grouped in the form of a load in pots, the installation comprising stations and a handling device to transport the pots from a station to a other, at least one of the stations comprising an oven arranged to receive and laterally surround one of the pots to subject it to a processing step thermal.
  • pot ovens are intended for loads of large volume (typically greater than 0.5 m 3 ), contained in generally cylindrical pots whose vertical dimension (height or depth) is much greater than the diameter. Heights of several meters are common.
  • the present invention applies essentially to installations of the second category, for which the charge remains inside the pot.
  • the different gases and other supplies are manually disconnected from the pot due to the amplitude of the movements of elevation of translation and lowering, to be reconnected manually once the pot is housed in another station.
  • This disconnection of the pot from its control and safety devices is considered to be delicate and dangerous, especially since the hot pot can contain significant amounts hydrogen.
  • the subject of the invention is an installation comprising one or more ovens with pots and to overcome all of these disadvantages.
  • the invention relates to an installation of the type indicated in preamble, characterized in that the oven is arranged to open laterally for allow the jar transported by the handling device to enter the oven and to get out of it by lateral displacement.
  • each pot can enter and leave the oven without have to be raised to its full height. As the pot usually rests on the top of the oven, just lift it a few inches to then be able to move it horizontally for transfer between the oven and the other stations. If the pot is suspended from a cart running on a track, the cart may be a low height above the oven and other devices forming the stations the installation, i.e. the height of the entire building housing installation can be significantly reduced. In addition, the size of the screens protecting the around the stations against the thermal radiation of the pots can also be scaled down. Finally, as the vertical amplitudes of the pot movements are very reduced, it is much easier to keep any possible pipeline connections between central power supplies and pots during movement.
  • the installation comprises a pot furnace 1 open upwards, comprising for example an external carcass 2, a layer of thermal insulation 3 and heating elements 4 here represented by electric heating bodies.
  • Other heating means such as gas or oil burners are obviously possible.
  • This oven is designed to receive a substantially cylindrical treatment pot 5, of diameter D and of length H, provided with a removable cover 6 which can be made integral with the pot by means of fasteners not shown and possibly provided with means for mixing the confined atmosphere in the pot, as will be described in the second example, as well as various connections 7 for supplying the pot with treatment gas and electricity.
  • the installation further includes a cooling cell or station 8 and a handling device for raising, lowering and moving the pots, shown here by a hoist 11 rolling on a track 29 fixed under an upper structure 13 of the building, the hoist being provided with a winch 14.
  • the cooling cell 8 is mainly consisting of a chassis and a thermally insulated carcass 9 or no, which supports the treatment pot 5 once engaged in the cell.
  • Cell 8 can be fitted with a fan 12 which brings cold air into contact with the pot when it is housed in the cell. Cooling cells like this can also be equipped with numerous devices to increase the speed of cooling of the treatment pot 5, such as for example injection devices sprayed liquids, nozzles arranged around the pot, etc.
  • the installation may include several furnaces treatment or tempering 1, several pots 5 and several cooling cells 8.
  • the oven 1 is designed to open in two parts 10 and 10 'so that the spacing of the two parts of the oven, equal to or greater than the outside diameter D of the treatment pot 5, allows the treatment pot 5 to be moved laterally from the center from oven 1 to a position outside the open or closed oven, without it being necessary to completely remove the pot 5 from the oven 1 by a vertical movement on its entire height H before any lateral translational movement of the pot.
  • the means allowing the complete or partial opening of the oven are not indicated but can typically include a combination of cylinders, chains pushers or racks, etc. and relative sliding plans between the fixed and mobile parts.
  • the moving parts of the oven are shown by two half-shells 10 and 10 'obtained by cutting the oven according to a passing plane by the vertical axis of the oven.
  • Other embodiments are possible, for example in the case of ovens (round base, square rectangular, polygonal, etc.) for which the two moving parts 10 and 10 ′ have a height less than the full height of the oven 1, but preferably extend over most of the height H and at less to the top of the oven. In such a case, the pot should be raised in a limited measure before moving it sideways.
  • the two movable parts 10 and 10 ' deviate one on the other so as to provide a larger free space than D, which allows the translational movement of the pot in two opposite directions.
  • the two moving parts 10 and 10 ' move away from each other by pivoting on a hinge located on a generator of the outer casing 2 of the oven.
  • the cooling cell 8 is designed on the same principle as the oven 1 and has two movable parts 15 and 15 'whose height agrees with that of parts 10 and 10 'of the oven.
  • the load to be treated is placed in the pot 5 and the pot is closed by means of cover 6.
  • the various fluid lines and supplies necessary for the course of treatment are connected to pot 5 at by means of the connections 7 located for example on the cover 6.
  • the length and the nature of the pipes and supplies between connections 7 and the cabinets distribution are studied so that the pot 5 is connected in permanence at the central distribution regardless of its position in the installation.
  • the assembly consisting of the pot 5 and its cover 6 is attached to the hoist 11 and raised a few centimeters to provide a small distance between its edge upper 16 and the top of the oven 1.
  • the oven 1 which may already be at a temperature high (between 500 ° C and 1000 ° C), is opened by the relative movement of its parts mobile 10 and 10 '.
  • the pot 5 provided with its cover 6 is introduced into the center of the oven in the by means of a lateral translation effected by the hoist 11.
  • the oven 1 is then closed and the pot 5 is lowered into the oven so that its rim 16 rests on the upper part of the oven 1.
  • the hoist 11 can be separated from the pot if necessary.
  • the heat treatment cycle in the oven can then begin.
  • the hoist 11 is returned integral with the assembly consisting of the pot 5 and its cover 6, the pot is raised by i a few centimeters above the top of oven 1, oven 1 is open as in the case of the loading described above, the cooling cell 8 is also open by moving the moving parts 15 and 15 'to allow the hoist 11 to bring the pot 5 to the center of the cell 8 by horizontal translation, the cell 8 is closed, the winch 14 deposits the pot 5 provided with its cover 6 on the upper part of cell 8 and the cooling cycle can be carried out.
  • the relative vertical movement between the constituted surfaces respectively by the upper part of the oven 1 and by the upper rim 16 of the pot is not absolutely necessary. In the case described, this movement is ensured by the winch 14 but it’s perfectly imaginable, in case this movement is necessary, whether it is carried out by a vertical movement of the furnace or the cooling or by a fixed or mobile device arranged on the furnace or the cooling cell.
  • the hoist 11 could for example be suspended to a pivoting bracket whose axis would be between the oven 1 and the cell 8.
  • a device supporting the pot from below for example a transport cart whose surface upper has thermal insulation, this carriage circulating below the treatment stations.
  • FIGs 3 and 4 are shown a treatment oven 1 opening in two parts 10 and 10 'as in the previous example, two cells of cooling 17 and 18 also opening in two parts similarly to the oven 1, and a tempering oven 19 also opening in two parts 20 and 20 '.
  • the installation also includes a station 21 which makes it possible to enter the pot or pots 5 in the installation and extract them.
  • the cover 6 of each pot is equipped with an atmosphere stirring device, comprising a motor 30 mounted on the cover 6, a shaft and a stirring wheel 31 disposed under the lid inside the pot 5.
  • a cart 22 for handling and transporting the pots is arranged above of the plane defined by the upper surface of the ovens and other stations the installation.
  • the carriage 22 is equipped with a device 23 for gripping the assemblies each consisting of a pot 5 and its lid 6.
  • the gripping device 23 can by example be made by pliers or by a cam mechanism or by a bayonet system.
  • the gripping device 23 couples to the cover 6 to lift and transport the entire pot and lid. Also it can handle the lid only when it is detached from the pot.
  • the carriage 22 is movable along the installation to allow the pots to be moved by translation in all of the elements or stations making up the installation.
  • the carriage 22 is movable on a track 24 consisting for example of two rails, by means of wheels 25 and a means of translation not shown.
  • Track 24 can be supported for example by a structure of the building or by porticoes.
  • a means of translation we can by example imagine an electric motor driving a pinion on a rack, a jack or a device using a push chain.
  • the example of Figures 3 and 4 is not unique and one can perfectly imagine a track arranged on the side of the elements or on the ground and consisting of one or more rails or any other guiding and moving means.
  • the closed jar (s) are permanently connected to the power supplies power plants (process gas, power supply, water supply from cooling, etc.) by means, for example, of flexible pipes 26 arranged in a cable chain 27.
  • This installation makes it possible to move the pot (s) 5 automatically in the various stations to carry out treatment sequences such as for example austenitization in oven 1, quenching in the cell cooling 18, a first tempering in the tempering furnace 19 followed by a cooling in the cooling cell 18, a second tempering in the furnace income 19 and so on. All movement movements of the pot (s) 5 are carried out by the handling device consisting of the carriage 22, the device 23 and the track 24.
  • the handling operation sequences can be controlled by a conventional programmable controller.
  • the installation can also be equipped with an external fairing 25 which confines the radiation of transfer pots.
  • the installation described is not limited to a configuration where the different elements or stations of the installation are arranged on a line or a map. Arrangements on several lines, parallel or not, are perfectly achievable, either by a transfer member (carriage) on several axes, or by allowing the various elements of the installation to pivot.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Tunnel Furnaces (AREA)
EP00810487A 1999-06-30 2000-06-02 Wärmebehandlungsanlage mit mindestens einem Muffelofen Withdrawn EP1065287A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH120899 1999-06-30
CH120899 1999-06-30

Publications (1)

Publication Number Publication Date
EP1065287A1 true EP1065287A1 (de) 2001-01-03

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ID=4205039

Family Applications (1)

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EP00810487A Withdrawn EP1065287A1 (de) 1999-06-30 2000-06-02 Wärmebehandlungsanlage mit mindestens einem Muffelofen

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE261041C (de) *
DE512173C (de) * 1925-12-02 1932-06-16 Bbc Brown Boveri & Cie Verfahren zum UEberfuehren von Gluehgut aus einem geschlossenen Gluehbehaelter in einen relativ zu diesem beweglichen Kuehlbehaelter
DE689349C (de) * 1937-08-31 1940-03-18 Schoeller Werk K G aenden unter Vakuum
US2284057A (en) * 1941-09-20 1942-05-26 Johnson Steel And Wire Company Pot for use in heat treating bundles of wire
FR2624593A1 (fr) * 1987-12-14 1989-06-16 Karmazsin Etienne Four comportant comme elements chauffants une serie de lampes a halogene
US4882468A (en) * 1987-09-04 1989-11-21 La Physique Appliquee Industrie Four electrique notamment pour traitement thermique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE261041C (de) *
DE512173C (de) * 1925-12-02 1932-06-16 Bbc Brown Boveri & Cie Verfahren zum UEberfuehren von Gluehgut aus einem geschlossenen Gluehbehaelter in einen relativ zu diesem beweglichen Kuehlbehaelter
DE689349C (de) * 1937-08-31 1940-03-18 Schoeller Werk K G aenden unter Vakuum
US2284057A (en) * 1941-09-20 1942-05-26 Johnson Steel And Wire Company Pot for use in heat treating bundles of wire
US4882468A (en) * 1987-09-04 1989-11-21 La Physique Appliquee Industrie Four electrique notamment pour traitement thermique
FR2624593A1 (fr) * 1987-12-14 1989-06-16 Karmazsin Etienne Four comportant comme elements chauffants une serie de lampes a halogene

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