DE102009014665A1 - Operating method for loading and unloading metallic materials in e.g. atmosphere furnace to perform heat treatment of metallic materials, involves starting operating cycle by loading load on plane moving perpendicular to chamber - Google Patents

Abstract

The method involves releasing a fixing part between a load (5) and an actuating unit during driving an actuating unit from a transport position by freely driving the load. The load is transported to a plane (7.2) without using the actuating unit to perform a quenching process, where the plane is moved to a quenching bath section (3.1) of a quenching chamber (3). The load is arranged in the bath section in an idle position. Operating cycle is newly started by loading another load on another plane (7.1) moving perpendicular towards a heating chamber (2). An independent claim is also included for a device for loading and unloading an industrial furnace.

Description

Technical area

The The invention relates to a working method and a device for Loading and unloading for an industrial furnace such as heat treatment furnace for the heat treatment of metallic materials. Especially the invention relates to loading and unloading within an atmospheric chamber furnace, as he z. B. for heat treatment by carburization of metallic Materials by inert gas, such. For example, carbon monoxide, hydrogen, Water vapor, carbon dioxide and nitrogen is used.

State of the art

• – eine Heizkammer, die in einen Behandlungsraum und einen Aufbereitungsraum unterteilt sein kann,
• – eine Abschreckkammer mit Abschreckbad und
• – eine Innentür zwischen Heizkammer und Abschreckkammer.

In particular, atmospheric chamber furnaces essentially comprise

• A heating chamber, which may be divided into a treatment room and a treatment room,
• - A quenching chamber with Abschreckbad and
• - An inner door between heating chamber and quenching chamber.

known manner are effective within the heat treatment furnaces Charging systems for batch transport with loading on the Side of quenching chamber assigned. However, for transportation also the loading on the side of the heating chamber possible. For these types of heat treatment furnaces separates an inner door the heating chamber and the quenching chamber.

The Charging system ensures a promotion of the heat-treated Materials (batch) such as B. for heat treatment Carburizing of metallic materials in the course of a loading and unloading cycle between cooling zone with the quenching chamber and heating chamber. After the heating phase said promotion runs from the heating chamber back to the cooling area with transfer of the batch to a lifting table for implementation the actual quenching process, such. B. in an oil bath.

• – einerseits die durch die Tür vermittelte Trennung der Heizkammer von der Abschreckkammer prozeßgerecht zu gewährleisten ist, wenn die Wärmebehandlung oder der Abschreckvorgang läuft,
• – andererseits der Wechsel der Taktfolgen zügig und ohne störende Beeinflussung durch den Bewegungsablauf der einzelnen Teile des Ladesystems vonstatten gehen muß.

The problem with this workflow is that

• On the one hand, the process of ensuring the separation of the heating chamber from the quenching chamber, mediated by the door, when the heat treatment or the quenching process is running,
• - On the other hand, the change of timing must be done quickly and without disturbing influence by the movement of the individual parts of the charging system.

The The prior art examined processes and devices to load and unload for industrial furnaces no approach to improve this complex system.

Thus, although the published patent application DE 39 08 265 A1 a transport device, which is suitable as a charging device only for high temperatures. Due to its long length, it eliminates the processes in compact industrial furnaces. In addition, this transport direction does not allow mechanized loading and unloading of the batch.

It was already an internally known charging system with the task developed, which needed for deterrence To reduce the amount of cooling gas and acting on the batch To improve quenching intensity in the quenching chamber.

• a) Heizkammer und Abschreckkammer nicht wie bisher in mehreren, sondern nur in einem Gehäuse mit einer die Heizkammer von der Abschreckkammer räumlich trennenden hochdruckfesten Trennwand mit Chargenöffnung für den Transport der Charge zu integrieren,
• b) die Chargenöffnung durch eine horizontal verfahrbare Trenntür abzudichten, die im abgedichteten Zustand die Heizkammer von der Abschreckkammer vakuum- und hochdruckfest trennt,
• c) in der Abschreckkammer ein horizontal verfahrbares Chargentransportsystem für den wechselseitigen Transport der Charge zwischen Abschreckkammer und Heizkammer anzuordnen,
• d) in der Heizkammer ein Chargenherdsystem vorzusehen und
• e) das Chargenherdsystem der Heizkammer und das Chargentransportsystem mit korrespondierenden Mitteln zur Übergabe/Übernahme der Charge auszustatten.

This was done according to DE 10 2008 029 001 already suggested

• a) heating chamber and quenching chamber not as previously in several, but only in a housing with a heating chamber of the quenching chamber spatially separating high-pressure-resistant partition to integrate with batch opening for the transport of the batch,
• b) to seal the batch opening by means of a horizontally movable separating door, which in the sealed state separates the heating chamber from the quenching chamber in a vacuum-tight and high-pressure-resistant manner,
• c) to arrange a horizontally movable charge transport system in the quenching chamber for the reciprocal transport of the charge between the quenching chamber and the heating chamber,
• d) to provide a batch hearth system in the heating chamber, and
• e) equip the batch hearth system of the heating chamber and the batch transport system with corresponding means for transferring / taking over the batch.

Also this solution requires large lengths and large load carriers to the occurring Loads over the required transport length too move.

Finally, known charging systems for the operation of several heat treatment furnaces according to the EP 1 473 372 lead to a considerable time delay in the time-critical quenching process.

A special feature of loading and unloading is when z. B. according to the DE 36 31 389 C2 or even the DE 10 2008 029 001 for saving inert gas, reducing heating energy losses, needs-based supply of a hydrocarbon such. As natural gas and for controlling the C potential for a generic heat treatment furnace such heat treatment furnaces a protective gas recirculation system for Gasaufkoh include. In these, the reprocessing of already "spent" inert gas, ie an inert gas with a low C potential, should advantageously take place. This inert gas recirculation system is hereinafter referred to as gas recirculation, for which likewise the loading and unloading of the batch is to be carried out without disadvantages.

Presentation of the invention

task

Of the Invention is based on the object, a working method and a device for loading and unloading an industrial furnace like heat treatment furnace for heat treatment of metallic materials, in particular for loading and unloading within an atmospheric chamber furnace, according to which the and discharge cycle using only a small space expires, while the cycle in the stages of the heat treatment trouble-free integrable and the primary Phases of the process of heat treatment, as essentially Heat phase and quenching phase, so not disturbed be that the process of heat treatment without adversely affecting, indeed accelerating can.

there the device according to the invention is intended as a charging system the batch consisting of the heat-treated material and the charging equipment (eg grates, baskets, etc.), in the Loading and unloading cycle from the cooling area in the heating chamber and after the heat phase back from the heating chamber convey into the cooling chamber by means of a lifting table. The introduction of z. B. quenching oil in the heating chamber should be limited to a minimum.

According to the task the invention also for heat treatment furnaces be applicable with the above gas recirculation, in which case the Operation must run continuously and loading and unloading-conditioned Interruptions do not interfere with the heat treatment may affect.

solution

The Task is performed according to the working method according to Claims 1 to 3 solved.

• – Beginn der Beladung und Beladung zur Wärmebehandlung,
• – Start des Entladevorgangs und Entladevorgang nach der Wärmebehandlung,
• – Freifahren der Charge,
• – Abschreckvorgang und Ruhestellung des Be- und Entladens unter Verwendung einer die Charge fördernden Vorrichtung zum Be- und Entladen,

die einzuhalten sind.The working method for loading and unloading for an industrial furnace such as heat treatment furnace with heating chamber and quenching chamber and interposed inner door for heat treatment of batches such as metallic materials requires a cycle of ongoing operations or temporarily pausing phases such

• - start of loading and loading for heat treatment,
• Start of unloading and unloading after the heat treatment,
• - retracting the batch,
• Quenching operation and rest position of loading and unloading using a batch conveying device for loading and unloading,

which are to be kept.

• a) vor Beginn der Beladung der Heizkammer die Charge auf einer zur Heizkammer vertikal bewegten ersten Ebene gelagert wird, dann die Charge von dieser ersten Ebene mittels horizontal agierender Aktionsmittel in die Heizkammer zu einer Position „Wärmebehandlung” gebracht wird und danach die Aktionsmittel aus der Heizkammer herausgezogen werden,
• b) mit dem Start des Entladevorgangs die Aktionsmittel bis zu einer Position „Rücktransport in Endstellung” in die Heizkammer eingefahren werden und dort eine Fixierung der Charge zu den Aktionsmitteln vorgenommen wird, sodann während des Entladevorgangs mittels der Aktionsmittel die Charge auf eine zur Heizkammer vertikal bewegte zweite Ebene in eine Position „Abschreckung” befördert wird,
• c) mit dem Freifahren der Charge während der gering aus einer „Transportstellung” fahrenden Aktionsmittel die Fixierung zwischen Charge und Aktionsmittel gelöst wird und
• d) für den Abschreckvorgang die Charge ohne die Aktionsmittel auf der zu einem Abschreckbad der Abschreckkammer bewegten zweiten Ebene befördert wird und für die folgende Ruhestellung die Charge im Abschreckbad bleibt, wobei die Aktionsmittel sich in einer die Fixierung vorbereitenden Position befinden und der Zyklus mit der Beladung einer neuen Charge auf der zur Heizkammer vertikal bewegten ersten Ebene neu begonnen werden kann.

According to the method, the object is achieved in that

• a) before the start of the loading of the heating chamber, the charge is stored on a first vertical plane to the heating chamber, then the batch is brought from this first level by horizontally acting action means in the heating chamber to a position "heat treatment" and then the action means from the heating chamber be pulled out,
• b) with the start of the unloading the action means are retracted to a position "return transport in end position" in the heating chamber and there fixation of the charge is made to the action means, then during the unloading process by means of the action means the batch to a vertically moved to the heating chamber second level is moved to a "deterrence" position,
• (c) by releasing the batch, while the means of transport are moving slightly from a "transport position", the fixation between the batch and the means of action is resolved; and
• d) for the quenching process, the batch is conveyed without the action means on the second level moving to a quench bath of the quenching chamber and for the following rest position the batch remains in the quench bath, the action means being in a fixation preparatory position and the cycle of loading a new batch can be restarted on the first level moved vertically to the heating chamber.

• a) vor Beginn der Beladung der Heizkammer die Charge auf einer ersten Ebene einer zweidimensional agierenden Vorrichtung mit vertikal bewegbarem Tisch gelagert wird, wobei die Innentür geschlossen und die Vorrichtung in Ruhestellung ist,
• b) mit der Beladung der Charge die Innentür geöffnet wird und die Charge durch Aktionsmittel der Vorrichtung mittels horizontalem Schub in die Heizkammer auf eine Position „Wärmebehandlung” gebracht wird,
• c) während der Wärmebehandlung die Innentür geschlossen ist und die Vorrichtung außerhalb der Heizkammer in Ruhestellung ist,
• d) mit dem Start des Entladevorgangs die Innentür teilweise geöffnet wird, Aktionsmittel der Vorrichtung bis zu einer Position „Rücktransport” in die Heizkammer eingefahren werden und in dieser Position eine Verbindung zwischen Charge und Vorrichtung mittels Fixierung hergestellt wird,
• e) während des Entladevorgangs die Innentür ganz geöffnet und Aktionsmittel der Vorrichtung die Charge durch horizontalen Zug auf eine zweite Ebene des Tisches in eine Position „Abschreckung” befördern,
• f) mit dem Freifahren der Charge die Innentür geschlossen wird und dabei während der gering aus der „Transportstellung” fahrenden Aktionsmittel der Vorrichtung die Fixierung zwischen Charge und Vorrichtung gelöst wird,
• g) für den Abschreckvorgang die Innentür geschlossen bleibt, dabei die Vorrichtung hinsichtlich einer ihrer horizontalen Bewegungsaktionen außer Funktion ist, jedoch dabei die Charge auf einer zweiten Ebene des vertikal in der Vorrichtung bewegbaren Tisches ohne die Aktionsmittel selbst in ein Abschreckbad der Abschreckkammer befördert wird und
• h) für die folgende Ruhestellung die Innentür geschlossen ist und die Charge im Abschreckbad bleibt, danach die Vorrichtung in ihren zweidimensionalen Aktionen zwar außer Funktion ist, jedoch die Aktionsmittel der Vorrichtung sich in einer die Fixierung vorbereitenden Position befinden und der Transportzyklus mit dem Arbeitsschritt neu begonnen werden kann.

The steps according to the invention consist in their further training mm in that

• a) before the loading of the heating chamber, the charge is stored on a first level of a two-dimensional device with a vertically movable table, wherein the inner door is closed and the device is at rest,
• b) with the loading of the batch, the inner door is opened and the batch is brought by means of action of the device by means of horizontal thrust in the heating chamber to a position "heat treatment",
• c) during the heat treatment, the inner door is closed and the device is outside the heating chamber at rest,
• d) with the start of the unloading the inside door is partially opened, action means of the device are retracted to a position "return transport" in the heating chamber and in this position, a connection between batch and device is made by fixation,
• e) during the unloading operation, fully open the inner door and action means of the apparatus move the batch by horizontal draw to a second level of the table into a "deterrent" position,
• f) the interior door is closed when the batch is moved free, and the fixation between the batch and the device is achieved during the action means of the device, which moves slightly out of the "transport position",
• g) for the quenching process, the inner door remains closed, the device is in function of one of their horizontal movement actions out of function, however, while the batch is transported on a second level of the vertically movable in the device table without the action means itself in a quench the quenching chamber and
• h) for the following rest position, the inner door is closed and the batch remains in the quench bath, after which the device is in its two-dimensional actions indeed inoperative, but the action means of the device are in a fixation preparatory position and the transport cycle is restarted with the step can be.

• i) im Arbeitsschritt a) eine Gasrezirkulation für ein aufzubereitendes Schutzgas zur Heizkammer angehalten wird,
• j) in den Arbeitsschritten b) und c) die Gasrezirkulation aktiviert wird und läuft,
• k) in den Arbeitsschritten d) bis h) die Gasrezirkulation zunächst angehalten wird und dann so bleibt, wonach der Transportzyklus für die Wärmebehandlung gemäß Schritt i) bzw. a) wiederholt wird.

In an application of the method for heat treatment furnaces with a protective gas recirculation system for gas carburizing is provided that

• i) in step a) a gas recirculation is stopped for a protective gas to be treated to the heating chamber,
• j) in steps b) and c) the gas recirculation is activated and running,
• k) in the steps d) to h) the gas recirculation is first stopped and then remains, after which the transport cycle for the heat treatment according to step i) or a) is repeated.

The Implementation of the working process is carried out with an inventive Device having the features of claims 4 to 10.

• e) Horizontal agierende Aktionsmittel mit Fixierung für das Be- und Entladen der Charge,
• f) eine zur Heizkammer vertikal bewegbare erste Ebene für die Lagerung der Charge vor der Beladung der Heizkammer,
• g) eine zur Heizkammer und zu einem Abschreckbad der Abschreckkammer vertikal bewegbare zweite Ebene für die Lagerung der Charge und Beförderung zu dem Abschreckbad, wobei
• h) die horizontal agierenden Aktionsmittel mit Fixierung sowohl in der ersten Ebene als auch in der zweiten Ebene mit der Charge in Einwirkung stehen.

In principle, the device comprises the following features:

• e) Horizontally acting action means with fixation for loading and unloading the batch,
• f) a first level, which can be moved vertically to the heating chamber, for the storage of the charge before the loading of the heating chamber,
• g) a second level vertically movable to the heating chamber and to a quench bath of the quenching chamber for the storage of the charge and transport to the quench bath, wherein
• h) the horizontally acting action means with fixation in the first level as well as in the second level with the batch are in effect.

• a) Aktionsmittel mit mindestens einer horizontal aus- und einfahrbaren und über ein Antriebsmittel geführten Schubstange mit Fixierung, welche einen ersten Finger und einen zweiten Finger aufweist und
• b) einen vertikal bewegbaren Tisch mit einer ersten Ebene zur Lagerung der Charge vor der Wärmebehandlung und einer zweiten Ebene zur Lagerung der Charge für deren Abschreckung.

The thus acting in a two-dimensional direction of action device for carrying out the working method for loading and unloading an industrial furnace such as heat treatment furnace with heating chamber and quenching chamber and interposed inner door is formed according to the invention

• a) action means with at least one horizontally extending and retractable and guided by a drive means push rod with fixation, which has a first finger and a second finger and
• b) a vertically movable table having a first level for storing the batch before the heat treatment and a second level for storing the batch for their deterrence.

The Drive means for the push rod has a space-saving Regarding a rollable pushing means such as chain and / or a sprocket on.

Advantageous is the function of a roll-up rack taking over Chain by means of the push rod in a rigidly guiding the chain rail movable, so that combined with one in the function Drive means in connection with the fixation thrust and train space-saving let execute.

At The push rod is at one end the first finger as a swiveling, over a backdrop umleg- or erectable driver for the Transport of the charge formed in the quenching chamber and the other End of the second finger for the transport of the batch the quenching chamber in the heating chamber firmly connected to the push rod.

Of the Table is with the first level for storage of the batch before the heat treatment and with the second level for storing the batch for their Deterrence arranged in the quench chamber. For procedural Fulfilling its function is the table for loading the heating chamber with the batch on the first level or for transport transfer the charge to the quench bath on the second level known drives, such as pneumatic cylinders or spindle nut systems vertically lowered and raised.

The invention will be described in more detail on a specific embodiment of an industrial furnace with reference to the drawings. However, the invention is generally applicable to industrial ovens for heating action such as heating and cooling of metallic materials, which relates to the loading and unloading of the batch.

Brief description of the drawings

The drawings show phases of the procedure of the working method and the design features of the device according to the invention ( 6 ) in an industrial furnace ( 1 ) for the heat treatment of batches ( 5 ) Metallic workpieces, for example, with recirculating inert gas, namely

1 the beginning of a loading of the batch ( 5 )

2 the loading of the batch ( 5 )

3 a heat treatment of the batch ( 5 ) with pulled constructive detail,

4 the start of an unloading process of the batch ( 5 )

5 unloading the batch ( 5 )

6 the free movement of the batch ( 5 )

7 the quenching process of the batch ( 5 )

8th a rest position of the device ( 6 ) and

9 another constructive detail of the scenery ( 9.5 ) with the first finger ( 9.1 ).

Best way to execute the invention

The drawings according to the 1 to 8th Outline an industrial furnace commonly used in practice 1 who has a heating chamber 2 with not designated treatment room and catalyst bed and a quenching chamber 3 with quench bath 3.1 having.

The treatment room with catalyst bed can be functional with the heating chamber 2 form a unit, but it can also be locally separated, which is not shown here.

The industrial furnace 1 In this embodiment, it may have a non-designated C potential regulator, which functionally corresponds to the catalyst bed not shown. Furthermore, a non-designated circulator for a circuit of a recirculating inert gas with controlled supply of air and natural gas and an unspecified gas-tight valve can be provided to an unnamed Abbrandstelle with not designated pressure regulator, which components function in an unnamed control loop.

An inner door 4 is located between the heating chamber 2 and quenching chamber 3 ,

The process described in the prior art for the sake of completeness, in which protective gas is recovered, can advantageously also be carried out with the new method according to the invention and the device according to the invention 6 expire.

However, the invention is not limited to industrial furnaces with recirculating inert gas, as described in the hand in the 1 to 8th illustrated constructive design is shown.

• – Gemäß 1 der Beginn der Beladung mit den Phasen: • Die Charge 5 steht auf einer ersten Ebene 7.1 eines Tisches 7, • die in diesem Fall gasdichte Innentür 4 ist geschlossen, • die in diesem Beispiel vorhandene Gasrezirkulation wird angehalten, • die Vorrichtung 6 ist im Bereich der Abschreckkammer in Ruhestellung.
• – Gemäß 2 die Beladung zur Wärmebehandlung mit den Phasen: • Die in diesem Fall gasdichte Innentür 4 ist geöffnet, • die in diesem Beispiel vorhandene Gasrezirkulation steht, • Aktionsmittel 9 der Vorrichtung 6 schieben die Charge 5 in die Heizkammer 2 auf eine Position „Wärmebehandlung”.
• – Gemäß 3 die Wärmebehandlung mit den Phasen: • Die in diesem Fall gasdichte Innentür 4 ist geschlossen, • die in diesem Beispiel vorhandene Gasrezirkulation läuft, • die Vorrichtung 6 ist im Bereich der Abschreckkammer in Ruhestellung.
• – Gemäß 4 der Start des Entladevorgangs mit den Phasen: • Die in diesem Fall gasdichte Innentür 4 ist teilweise geöffnet, • die in diesem Beispiel vorhandene Gasrezirkulation steht, • Aktionsmittel 9 der Vorrichtung 6 sind ausgefahren in Endstellung und schieben dabei die Charge 5 weiter in die Heizkammer 2, • ein erster Finger 8.1 einer Fixierung 8 der Vorrichtung 6 fällt in eine Transportstellung.
• – Gemäß 5 nach der Wärmebehandlung der Entladevorgang mit den Phasen: • Die in diesem Fall gasdichte Innentür 4 ist ganz geöffnet, • die in diesem Beispiel vorhandene Gasrezirkulation steht, • Aktionsmittel 9 der Vorrichtung 6 ziehen die Charge auf eine zweite Ebene 7.2 des Tisches 7 bis in eine Position „Abschrecken”.
• – Gemäß 6 das Freifahren der Charge 5 mit den Phasen: • Die in diesem Fall gasdichte Innentür 4 schließt, • die in diesem Beispiel vorhandene Gasrezirkulation steht, • Aktionsmittel 9 der Vorrichtung 6 fahren gering in Richtung Heizkammer 2, um den ersten Finger 8.1 der Fixierung 8 aus dem Eingriff an der Charge 5 zu lösen.
• – Gemäß 7 den Abschreckvorgang mit den Phasen: • Die in diesem Fall gasdichte Innentür 4 ist geschlossen, • die in diesem Beispiel vorhandene Gasrezirkulation steht, • die Aktionsmittel 9 der Vorrichtung 6 stehen, • der Tisch 7 mit der auf der zweiten Ebene 7.2 sich befindenden Charge 5 wird ins Abschreckbad abgesenkt.
• – Gemäß 8 mit den Phasen: • Die in diesem Fall gasdichte Innentür 4 ist geschlossen, • die in diesem Beispiel vorhandene Gasrezirkulation steht, • die Charge 5 befindet sich im Abschreckbad 3.1, • die Aktionsmittel 9 der Vorrichtung 6 fahren in Ruhestellung, dabei wird der erste Finger 8.1 über eine Kulisse 9.6 wieder aufgerichtet und • die Vorrichtung 6 steht so für einen neuen Ladevorgang bereit.

According to the working method according to the invention for loading and unloading by means of the device 6 is for the industrial furnace 1 with heating chamber 2 and quenching chamber 3 and interposed inner door 4 for heat treatment of batches 5 illustrated with metallic workpieces the following cycle of ongoing operations or temporarily pausing phases in the drawings:

• - According to 1 the beginning of loading with the phases: • The batch 5 is on a first level 7.1 a table 7 • the gas-tight inner door in this case 4 is closed, • the gas recirculation in this example is stopped, • the device 6 is at rest in the area of the quenching chamber.
• - According to 2 the load for the heat treatment with the phases: • The in this case gas-tight inner door 4 is open, • the gas recirculation in this example is available, • means of action 9 the device 6 push the batch 5 in the heating chamber 2 to a position "heat treatment".
• - According to 3 the heat treatment with the phases: • The in this case gas-tight inner door 4 is closed, • the gas recirculation in this example is running, • the device 6 is at rest in the area of the quenching chamber.
• - According to 4 the start of the discharging process with the phases: • The in this case gas-tight inner door 4 is partially open, • the gas recirculation is present in this example, • means of action 9 the device 6 are ausgefah in the end position and push the batch 5 further into the heating chamber 2 , • a first finger 8.1 a fixation 8th the device 6 falls into a transport position.
• - According to 5 after the heat treatment the discharge process with the phases: • The in this case gas-tight inner door 4 is completely open, • the gas recirculation in this example is available, • means of action 9 the device 6 pull the batch to a second level 7.2 the table 7 into a position "quenching".
• - According to 6 the free movement of the batch 5 with the phases: • The in this case gas-tight inner door 4 closes, • the gas recirculation present in this example, • means of action 9 the device 6 drive slightly towards the heating chamber 2 to the first finger 8.1 the fixation 8th out of engagement with the batch 5 to solve.
• - According to 7 the quenching process with the phases: • The in this case gas-tight inner door 4 is closed, • the gas recirculation in this example is available, • the means of action 9 the device 6 stand, • the table 7 with the second level 7.2 existing batch 5 is lowered into the quench bath.
• - According to 8th with the phases: • The in this case gas-tight inner door 4 is closed, • the gas recirculation is present in this example, • the charge 5 is in the quench bath 3.1 , • the means of action 9 the device 6 go to rest, this will be the first finger 8.1 over a backdrop 9.6 set up again and • the device 6 is thus ready for a new charge.

• a) Vor Beginn der Beladung der Heizkammer 2 wird die Charge 5 auf einer zur Heizkammer 2 vertikal bewegten ersten Ebene 7.1 gelagert, dann die Charge 5 von dieser ersten Ebene 7.1 mittels horizontal agierender Aktionsmittel 9 in die Heizkammer 2 zu einer Position „Wärmebehandlung” gebracht, wonach die Aktionsmittel 9 aus der Heizkammer 2 herausgezogen werden,
• b) mit dem Start des Entladevorgangs werden die Aktionsmittel 9 bis zu einer Position „Rücktransport in Endstellung” in die Heizkammer 2 eingefahren, dort erfolgt eine Fixierung 8 der Charge 5 zu den Aktionsmitteln 9, sodann wird während des Entladevorgangs mittels der Aktionsmittel 9 die Charge 5 auf eine zur Heizkammer 2 vertikal bewegte zweite Ebene 7.2 in eine Position „Abschreckung” befördert,
• c) mit dem Freifahren der Charge 5 wird während der gering aus einer „Transportstellung” fahrenden Aktionsmittel 9 die Fixierung 8 zwischen Charge 5 und Aktionsmittel 9 gelöst und
• d) für den Abschreckvorgang wird die Charge 5 ohne die Aktionsmittel 9 auf der zu einem Abschreckbad 3.1 der Abschreckkammer 3 bewegten zweiten Ebene 7.2 befördert, für die folgende Ruhestellung bleibt die Charge 5 im Abschreckbad 3.1, wobei die Aktionsmittel 9 sich in einer die Fixierung 8 vorbereitenden Position befinden und der Zyklus mit der Beladung einer neuen Charge 5 auf der zur Heizkammer 2 vertikal bewegten ersten Ebene 7.1 neu begonnen werden kann.

Assuming these representations, the working method according to the invention is basically explained by the following characteristic steps:

• a) Before starting the loading of the heating chamber 2 will be the batch 5 on one to the heating chamber 2 vertically moving first level 7.1 stored, then the batch 5 from this first level 7.1 by means of horizontally acting means of action 9 in the heating chamber 2 brought to a position "heat treatment", according to which the action means 9 from the heating chamber 2 be pulled out,
• b) with the start of the unloading process, the means of action 9 up to a position "return transport into end position" in the heating chamber 2 retracted, there is a fixation 8th the batch 5 to the means of action 9 , then during the unloading process by means of action 9 batch 5 on one to the heating chamber 2 vertically moving second level 7.2 promoted to a position of "deterrence",
• c) with the free movement of the batch 5 is during the low from a "transport position" driving action 9 the fixation 8th between batch 5 and action means 9 solved and
• d) for the quenching process, the batch 5 without the means of action 9 on the to a quenching bath 3.1 the quenching chamber 3 moving second level 7.2 for the following rest position remains the batch 5 in the quench bath 3.1 , where the means of action 9 yourself in a fixation 8th preparatory position and the cycle with the loading of a new batch 5 on the to the heating chamber 2 vertically moving first level 7.1 can be restarted.

• a) Vor Beginn der Beladung der Heizkammer 2 wird die Charge 5 auf einer ersten Ebene 7.1 eines in einer vertikalen Dimension bewegbaren Tisches 7 der zweidimensional agierenden Vorrichtung 6 gelagert, dabei die Innentür 4 geschlossen und horizontal agierende Aktionsmittel 9 der Vorrichtung 6 in Ruhestellung sind,
• b) mit der Beladung der Charge 5 wird die Innentür 4 geöffnet und die Charge 5 mittels der schiebende Aktionsmittel 9 der Vorrichtung 6 in die Heizkammer 2 zu einer Position „Wärmebehandlung” gebracht,
• c) während der Wärmebehandlung ist die Innentür 4 geschlossen und die Vorrichtung 6 außerhalb der Heizkammer 2 in Ruhestellung,
• d) mit dem Start des Entladevorgangs wird die Innentür 4 teilweise geöffnet, die Aktionsmittel 9 der Vorrichtung 6 werden bis zu einer Position „Rücktransport in Endstellung” in die Heizkammer 2 eingefahren, wo eine Fixierung 8 der Charge 5 vorgenommen und in dieser Position eine Verbindung zwischen Charge 5 und Aktionsmittel 9 der Vorrichtung 6 hergestellt wird,
• e) während des Entladevorgangs wird die Innentür 4 vollständig geöffnet, mittels Aktionsmittel 9 der Vorrichtung 6 wird die Charge 5 auf eine zweite Ebene 7.2 des absenkbaren Tisches 7 in eine Position „Abschreckung” befördert,
• f) mit dem Freifahren der Charge 5 wird die Innentür 4 geschlossen und dabei während der gering aus der „Transportstellung” fahrenden Aktionsmittel 9 der Vorrichtung 6 die Fixierung 8 zwischen Charge 5 und Aktionsmittel 9 der Vorrichtung 6 gelöst,
• g) für den Abschreckvorgang bleibt die Innentür 4 geschlossen, dabei ist die Vorrichtung 6 hinsichtlich der Bewegungsaktionen ihrer Aktionsmittel 9 außer Funktion, jedoch wird die Charge 5 auf der zweiten Ebene 7.2 des in der vertikalen Dimension bewegbaren Tisches 7 ohne die Aktionsmittel 9 in ein Abschreckbad 3.1 der Abschreckkammer 3 befördert und
• h) für die folgende Ruhestellung bleibt die Innentür 4 geschlossen, die Charge 5 befindet sich im Abschreckbad 3.1, danach ist die Vorrichtung 6 in ihren zweidimensionalen Aktionen des Be- und Entladens außer Funktion, jedoch befindet sich die Vorrichtung 6 in einer die Fixierung 8 vorbereitenden Position, wonach der Transportzyklus mit dem Arbeitsschritt a) neu begonnen werden kann.

The working procedure can be expanded as follows:

• a) Before starting the loading of the heating chamber 2 will be the batch 5 on a first level 7.1 a movable table in a vertical dimension 7 the two-dimensional acting device 6 stored, while the inner door 4 closed and horizontally acting means of action 9 the device 6 are at rest,
• b) with the loading of the batch 5 will be the inner door 4 opened and the batch 5 by means of the sliding action means 9 the device 6 in the heating chamber 2 brought to a position "heat treatment",
• c) during the heat treatment is the inner door 4 closed and the device 6 outside the heating chamber 2 at rest,
• d) with the start of the unloading process, the inner door 4 partially open, the means of action 9 the device 6 be up to a position "return transport in end position" in the heating chamber 2 retracted, where a fixation 8th the batch 5 made and in this position a connection between batch 5 and action means 9 the device 6 will be produced,
• e) during the unloading process, the inner door 4 completely open, by means of action 9 the device 6 will be the batch 5 on a second level 7.2 of the lowerable table 7 promoted to a position of "deterrence",
• f) with the free movement of the batch 5 will be the inner door 4 closed and during the low from the "transport position" driving action 9 the device 6 the fixation 8th between batch 5 and action means 9 the device 6 solved,
• g) for the quenching remains the inner door 4 closed, this is the device 6 with regard to the movement actions of their means of action 9 out of action, however, the batch becomes 5 on the second level 7.2 of the table movable in the vertical dimension 7 without the means of action 9 in a quench bath 3.1 the quenching chamber 3 promoted and
• h) the inner door remains for the following rest position 4 closed, the batch 5 is in the quench bath 3.1 after that is the device 6 in their two-dimensional actions of loading and unloading out of action, however, the device is located 6 in one the fixation 8th preparatory position, after which the transport cycle with the step a) can be restarted.

• i) in den Arbeitsschritten a) und b) eine Gasrezirkulation für ein aufzubereitendes Schutzgas zur Heizkammer 2 angehalten wird,
• j) in dem Arbeitsschritt c) die Gasrezirkulation aktiviert wird und läuft und
• k) in den Arbeitsschritten d) bis h) die Gasrezirkulation zunächst wieder angehalten wird und dann so bleibt, wobei der Transportzyklus für die Wärmebehandlung gemäß Schritt i) bzw. a) wiederholt wird.

In an application of the method for heat treatment furnaces with a protective gas recirculation system for gas carburizing is provided that

• i) in steps a) and b) a gas recirculation for a protective gas to be treated to the heating chamber 2 is stopped
• j) in step c) the gas recirculation is activated and running and
• k) in the steps d) to h), the gas recirculation is first stopped again and then remains so, wherein the transport cycle for the heat treatment according to step i) or a) is repeated.

Advantageous can be ensured that the process steps of Heat treatment and the stages of inert gas recovery in their connection to loading and unloading continue to be continuous and can run without delay.

• a) Horizontal agierende Aktionsmittel 9 mit Fixierung 8 für das Be- und Entladen der Charge 5,
• b) eine zur Heizkammer 2 vertikal bewegbare erste Ebene 7.1 für die Lagerung der Charge 5 vor der Beladung der Heizkammer 2,
• c) eine zur Heizkammer 2 und zu einem Abschreckbad 3.1 der Abschreckkammer 3 vertikal bewegbare zweite Ebene 7.2 für die Lagerung der Charge 5 und Beförderung zu dem Abschreckbad 3.1, wobei
• d) die horizontal agierenden Aktionsmittel 9 mit Fixierung 8 sowohl in der ersten Ebene 7.1 als auch in der zweiten Ebene 7.2 auf die Charge 5 einwirkend in Verbindung stehen.

From the 1 to 8th it can be seen that the device 6 with two-dimensional direction of action for carrying out the loading and unloading process for the industrial furnace 1 like heat treatment furnace with heating chamber 2 and quenching chamber 3 and interposed inner door 4 the following features include:

• a) Horizontally acting means of action 9 with fixation 8th for loading and unloading the batch 5 .
• b) one to the heating chamber 2 vertically movable first level 7.1 for the storage of the batch 5 before loading the heating chamber 2 .
• c) one to the heating chamber 2 and to a quench bath 3.1 the quenching chamber 3 vertically movable second level 7.2 for the storage of the batch 5 and transportation to the quench bath 3.1 , in which
• d) the horizontally acting means of action 9 with fixation 8th both in the first level 7.1 as well as in the second level 7.2 on the batch 5 interactively interact.

• a) Aktionsmittel 9 mit mindestens einer horizontal aus- und einfahrbaren und über ein Antriebsmittel 9.2 geführten Schubstange 9.1 mit Fixierung 8, welche einen ersten Finger 8.1 und einen zweiten Finger 8.2 aufweist, und
• b) einen in einer zweiten Dimension zu dem Aktionsmittel 9 vertikal bewegbaren Tisch 7 mit einer ersten Ebene 7.1 zur Lagerung der Charge 5 vor der Wärmebehandlung und einer zweiten Ebene 7.2 zur Lagerung der Charge 5 für deren Abschreckung.

The device 6 is trained by

• a) means of action 9 with at least one horizontally extending and retractable and a drive means 9.2 guided push rod 9.1 with fixation 8th giving a first finger 8.1 and a second finger 8.2 has, and
• b) one in a second dimension to the means of action 9 vertically movable table 7 with a first level 7.1 for storage of the batch 5 before the heat treatment and a second level 7.2 for storage of the batch 5 for their deterrence.

In detail according to 3 it is shown that the drive means 9.2 for the push rod 9.1 a roll-up pushing means like chain 9.3 and a sprocket 9.4 having. The push rod 9.1 is by means of the function of a quasi "roll-up rack" accepting, rigidly guided in a rail chain 9.3 movable back and forth.

According to another detail in 9 is at the push rod 9.1 at one end the first finger 8.1 as a swiveling, over a backdrop umleg- or erectable carrier for the transport of the batch 5 in the quenching chamber 3 educated.

General is the 1 to 8th removable, that the second finger 8.2 for the transport of the batch 5 from the quenching chamber 3 in the heating chamber 2 fixed or rotatable with the push rod 9.1 connected is.

In the 1 to 8th is shown that the vertically up and lowerable table 7 with the first level 7.1 for storage of the batch 5 before the heat treatment and with the second level 7.1 for storage of the batch 5 for their deterrence in the area of the quenching chamber 3 is arranged. This is the table 7 for loading the heating chamber 2 with the batch 5 on the first level 7.1 or to transport the batch 5 on the second level 7.2 in the quench bath 3.1 via a drive 10 , such as pneumatic cylinders or spindle-nut systems lowered and raised.

This combination of horizontally movable and structurally specially designed action means 9 and the vertically lowered and raised first level 7.1 as well as second level 7.2 the table 7 Surprisingly ensures a time and space-saving process of loading and unloading a batch 5 ,

Industrial Applicability

Of the Test setup confirmed the function of the described Features and their advantages, with which a manufacturer and user side Utilization of the invention and its method and device side Realization in an industrial furnace with the desired advantages becomes possible.

1

industrial furnace

2

heating chamber

3

quenching

3.1

quenching

4

interior door

5

charge

6

contraption

7

table

7.1

first level

7.2

second level

8th

fixation

8.1

first finger

8.2

second finger

9

means of action

9.1

pushrod

9.2

drive means

9.3

Chain / rack

9.4

Sprocket

9.5

rail

9.6

scenery

10

drive

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 3908265 A1 [0007]
• - DE 102008029001 [0009, 0012]
• - EP 1473372 [0011]
• - DE 3631389 C2 [0012]

Claims (10)

Working method for loading and unloading for an industrial furnace ( 1 ) like heat treatment furnace, comprising a heating chamber ( 2 ) and quenching chamber ( 3 ) and interposed inner door ( 4 ) for the heat treatment of batches ( 5 ) with metallic materials in a cycle of ongoing operations or temporarily pausing phases, such as the beginning of the loading and loading for heat treatment, start of the unloading process and unloading process after the heat treatment, free running of the batch ( 5 ), Quenching and rest position of loading and unloading using a batch ( 5 ) conveying device ( 6 ) for loading and unloading, characterized by the steps that a) before starting the loading of the heating chamber ( 2 ) batch ( 5 ) on a to the heating chamber ( 2 ) vertically moving first level ( 7.1 ) is stored, then the batch ( 5 ) from this first level ( 7.1 ) by means of horizontally acting action means ( 9 ) in the heating chamber ( 2 ) is brought to a position "heat treatment" and then the action means ( 9 ) from the heating chamber ( 2 ), b) with the start of unloading, the means of action ( 9 ) to a position "return transport into end position" in the heating chamber ( 2 ) are retracted and there a fixation ( 8th ) of the batch ( 5 ) on the means of action ( 9 ), then during unloading by means of action ( 9 ) batch ( 5 ) to a heating chamber ( 2 ) vertically moving second level ( 7.2 ) is moved to a "deterrent" position c) with the batch being cleared ( 5 ) during the action means ( 9 ) the fixation ( 8th ) between batch ( 5 ) and means of action ( 9 ) and d) for the quenching process the batch ( 5 ) without the means of action ( 9 ) on the to a quench bath ( 3.1 ) the quenching chamber ( 3 ) moving second level ( 7.2 ) and for the following rest position the batch ( 5 ) in the quench bath ( 3.1 ), whereby the means of action ( 9 ) in one the fixation ( 8th ) and the cycle with the loading of a new batch ( 5 ) on the heating chamber ( 2 ) vertically moving first level ( 7.1 ) can be restarted. Working method according to claim 1, characterized in that a) before the loading of the heating chamber ( 2 ) batch ( 5 ) on a first level ( 7.1 ) of a table movable in a vertical dimension ( 7 ) of the two-dimensionally acting device ( 6 ), while the inner door ( 4 ) and the horizontally acting means of action ( 9 ) of the device ( 6 ) are at rest, b) with the loading of the batch ( 5 ) the inner door ( 4 ) and the batch ( 5 ) by the horizontally acting action means ( 9 ) of the device ( 6 ) in the heating chamber ( 2 ) is brought to a position "heat treatment", c) during the heat treatment, the inner door ( 4 ) and the device ( 6 ) in total outside the heating chamber ( 2 ) is at rest, d) with the start of the unloading the inner door ( 4 ) is partially opened, the means of action ( 9 ) of the device ( 6 ) to a position "return transport into end position" in the heating chamber ( 2 ), there is a fixation ( 8th ) of the batch ( 5 ) and in this position a connection between batch ( 5 ) and means of action ( 9 ) of the device ( 6 ), e) during the unloading process the inner door ( 4 ) is completely opened, with the action means ( 9 ) of the device ( 6 ) batch ( 5 ) to a second level ( 7.2 ) of the lowerable table ( 7 ) is moved to a "deterrent" position, f) when the batch is cleared ( 5 ) the inner door ( 4 ) and during the low-transporting action ( 9 ) of the device ( 6 ) the fixation ( 8th ) between batch ( 5 ) and means of action ( 9 ) of the device ( 6 ), g) for the quenching process the inner door ( 4 ) remains closed, while the device ( 6 ) as regards their means of action ( 9 ) is out of action, but the batch ( 5 ) on the second level ( 7.2 ) of the table movable in the vertical dimension ( 7 ) of the device ( 6 ) without the means of action ( 9 ) even in a quench bath ( 3.1 ) the quenching chamber ( 3 ) and h) for the following rest position the inner door ( 4 ) and the batch ( 5 ) in the quench bath ( 3.1 ), then the device ( 6 ) is inoperative in its two-dimensional loading and unloading operations, 9 ) of the device ( 6 ) in one the fixation ( 8th ) and the cycle can be restarted with step a). Working method for use for heat treatment furnaces with a protective gas recirculation system for gas carburizing according to claim 2, characterized in that i) in steps a) and b) a gas recirculation for a protective gas to be treated to the heating chamber ( 2 j) in step b), the gas recirculation is activated and runs and k) in steps d) to h) the gas recirculation is first stopped and then remains, after which the transport cycle for the heat treatment according to step i) or a) is repeated. Contraption ( 6 ) with two-dimensional directions of action for carrying out the method of operation according to claim 1 for loading and unloading a batch ( 5 ) with metallic materials for an industrial furnace ( 1 ) like heat treatment furnace with heating chamber ( 2 ) and quenching chamber ( 3 ) and since between arranged inner door ( 4 ), comprising the following features: a) horizontally acting action means ( 9 ) with fixation ( 8th ) for loading and unloading the batch ( 5 ), b) one to the heating chamber ( 2 ) vertically movable first level ( 7.1 ) for the storage of the batch ( 5 ) before loading the heating chamber ( 2 ), c) one to the heating chamber ( 2 ) and to a quench bath ( 3.1 ) the quenching chamber ( 3 ) vertically movable second level ( 7.2 ) for the storage of the batch ( 5 ) and transport to the quench bath ( 3.1 ), where d) the horizontally acting means of action ( 9 ) with fixation ( 8th ) both at the first level ( 7.1 ) as well as in the second level ( 7.2 ) on the batch ( 5 ) interactively. Contraption ( 6 ) according to claim 4, characterized by e) action means ( 9 ) with at least one horizontally extendable and retractable drive means ( 9.2 ) guided push rod ( 9.1 ) with fixation ( 8th ), which has a first finger ( 8.1 ) and a second finger ( 8.2 ) and f) a relative and in a second dimension to the means of action ( 9 ) movable table ( 7 ) with the first level ( 7.1 ) for storage of the batch ( 5 ) before the heat treatment and the second level ( 7.2 ) for storage of the batch ( 5 ) for their deterrence. Contraption ( 6 ) according to claim 4 or 5, characterized in that the drive means ( 9.2 ) for the push rod ( 9.1 ) a rollable pushing means such as chain ( 9.3 ) exhibit. Contraption ( 6 ) according to one of claims 4 to 6, characterized in that the drive means ( 9.2 ) for the push rod ( 9.1 ) a sprocket ( 9.4 ) exhibit. Contraption ( 6 ) according to one of claims 4 to 7, characterized in that the chain ( 9.3 ) by means of the push rod ( 9.1 ) in one the chain ( 9.3 ) rigidly guiding rail ( 9.5 ) is movable. Contraption ( 6 ) according to one of claims 4 to 8, characterized in that on the push rod ( 9.1 ) at one end the first finger ( 8.1 ) as a swiveling, over a backdrop ( 9.6 ) transferable or erectable carriers for the transport of the batch ( 5 ) in the quenching chamber ( 3 ) is formed and the second finger ( 8.2 ) for the transport of the batch ( 5 ) from the quenching chamber ( 3 ) in the heating chamber ( 2 ) fixed or rotatable at the other end with the push rod ( 9.1 ) connected is. Contraption ( 6 ) according to one of claims 4 to 9, characterized in that the table ( 7 ) with the first level ( 7.1 ) for storage of the batch ( 5 ) before the heat treatment and with the second level ( 7.1 ) for storage of the batch ( 5 ) for their deterrence in the area of the quenching chamber ( 3 ), the table ( 7 ) for loading the heating chamber ( 2 ) with the batch ( 5 ) at the first level ( 7.1 ) or to transport the batch ( 5 ) on the second level ( 7.2 ) in the quench bath ( 3.1 ) via a drive ( 10 ), as pneumatic cylinder or spindle nut systems can be lowered and raised.