EP0754768B1 - Ofen zur Wärmebehandlung von Chargen metallischer Werkstücke - Google Patents
Ofen zur Wärmebehandlung von Chargen metallischer Werkstücke Download PDFInfo
- Publication number
- EP0754768B1 EP0754768B1 EP96710009A EP96710009A EP0754768B1 EP 0754768 B1 EP0754768 B1 EP 0754768B1 EP 96710009 A EP96710009 A EP 96710009A EP 96710009 A EP96710009 A EP 96710009A EP 0754768 B1 EP0754768 B1 EP 0754768B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- chamber
- heating chamber
- furnace
- cooling
- 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 - Lifetime
Links
- 239000002184 metal Substances 0.000 title description 2
- 238000010438 heat treatment Methods 0.000 claims abstract description 73
- 239000007789 gas Substances 0.000 claims abstract description 58
- 239000000112 cooling gas Substances 0.000 claims abstract description 47
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 230000035515 penetration Effects 0.000 description 9
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
-
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
-
- 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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/16—Arrangements of air or gas supply devices
-
- 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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/14—Arrangements of heating devices
- F27B2005/143—Heating rods disposed in the chamber
-
- 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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/16—Arrangements of air or gas supply devices
- F27B2005/161—Gas inflow or outflow
- F27B2005/162—Gas inflow or outflow through closable or non-closable openings of the chamber walls
-
- 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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/16—Arrangements of air or gas supply devices
- F27B2005/166—Means to circulate the atmosphere
- F27B2005/167—Means to circulate the atmosphere the atmosphere being recirculated through the treatment chamber by a turbine
-
- 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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/16—Arrangements of air or gas supply devices
- F27B2005/166—Means to circulate the atmosphere
- F27B2005/167—Means to circulate the atmosphere the atmosphere being recirculated through the treatment chamber by a turbine
- F27B2005/168—Means to circulate the atmosphere the atmosphere being recirculated through the treatment chamber by a turbine by more than one turbine
Definitions
- the invention relates to a furnace for the heat treatment of batches of metal Workpieces, especially vacuum furnaces, with a furnace housing and one therein leaving one divided into an outer and an inner chamber Intermediate trained heating chamber, as well as with one within the furnace housing arranged gas cooling device, which over the chambers and in at least two heating chamber walls formed closable openings with the Heating chamber for the supply and removal of cooling gas is connected, the outer, the Chamber surrounding the heating chamber as a pressure chamber of a cooling gas blower and the inner chamber arranged between the heating chamber and the gas cooling device is designed as a suction chamber of the cooling gas blower.
- Furnaces of the type described above are of various types Embodiments known. From DE utility model 93 11 985
- a furnace is known in which the in the heating chamber walls trained openings by means of a hatch mechanism or rotatable ring plate can be opened and closed.
- the cooling gas can enter the heating chamber unhindered, but it points into the Heating chamber penetrating cooling gas jet does not have a large depth of penetration because on the one hand the diameter D of the opening is very large and the nozzle length L is very small. This does not lead to the formation of a real gas jet or only a very short beam.
- the distance between the opening and the batch is very large, so that the cooling gas jet up resolved to hit the batch.
- a greater cooling effect of the Gases in such an oven can only be produced by Increase in gas velocity and thus the performance of the Cooling gas blower can be achieved, which in turn is larger and more expensive Blower motors.
- the invention has for its object to avoid the disadvantages mentioned above to create a furnace for the heat treatment of batches of metallic workpieces, which allows targeted cooling of the batch arranged in the furnace chamber with a high penetration depth without increasing the cooling gas blower.
- gas-guiding devices are arranged such that they are adjustable in such a way that they block the cooling gas flow from the pressure chamber to the heating chamber in the upper position lifted from the openings and in the position lowered onto the openings the cooling gas flow from the Shut off the suction chamber towards the heating chamber and that each gas guiding device consists of a box-shaped support frame in which interchangeable gas guide elements can be used.
- the gas guide consists of a box-shaped support frame, in the interchangeable gas guide elements can be used.
- This interchangeability the gas guiding elements is particularly advantageous since this retrofits the furnace can be carried out particularly quickly and easily on new batch types can.
- the Gas guiding element usable as one with nozzles provided plate formed.
- the nozzles show that the core jet has a high penetration depth a funnel-shaped inflow area.
- the arrangement of the nozzles in the height-adjustable gas guide device it is thus possible, by the Selection of the nozzle diameter and the distance between the Nozzle outlet and the batch surface the penetration depth of the core jet of the Cooling gas in the batch can be predetermined.
- the Gas guiding element usable as one with a variety rectifier grid provided with holes is formed.
- a such rectifier grid is one with a variety of Drilled plate, which is about 90% of the open cross section of the in the opening of the heating chamber wall.
- the use of a such rectifier grid is made possible by that height-adjustable gas guide first a certain dynamic pressure in the Pressure chamber can be built up so that the rectifier grid incident cooling gas flow through the holes in the rectifier grid without significant speed reductions and flow resistance is evened over the width of the opening.
- Such inexpensive too Manufacturing rectifier grids are used especially when none large depths of penetration are required.
- the furnace system shown in Fig. 1 consists essentially of a Furnace housing 1 and two pressure-tight with this furnace housing 1 closable hoods 2, the left hood 2 for receiving a - Not shown - electric drive for a cooling gas blower 3 is used.
- Inside the furnace housing 1 is an outer chamber 4 Surrounded heating chamber 6 surrounded by heating chamber walls 5 arranged.
- Heating chamber 6 surrounded by heating chamber walls 5 arranged.
- Heating elements arranged. Circulating the furnace atmosphere within the Heating chamber 6 takes place in the case of convective heating via a fan 8.
- Gas cooling device 9 arranged, consisting of the cooling gas blower 3 and a Heat exchanger 10 exists. Starting from the left hood 2 for recording of the electric drive for the cooling gas blower 3 is the outer, the heating chamber 6 surrounding chamber 4 as with the pressure side of the cooling gas blower 3 connected pressure chamber formed while an inner, between the Heating chamber 6 and the gas cooling device 9 formed chamber 11 as with the suction side of the cooling gas blower 3 connected suction chamber is formed.
- the heating chamber walls 5 have openings 12 which for connecting to the pressure chamber 4 or the suction chamber 11 via hatches 13 can be opened and closed. These hatches 13 are over one Hatch actuation 14, not described in more detail, can be driven.
- the gas guiding devices 15 each consist of an exemplary embodiment Support frame 16, can be used in the interchangeable gas guide elements 17 are.
- the gas guiding devices 15 are in the area of Openings 12 arranged that these in the of the openings 12th lifted upper position (shown in Fig. 1 below), the pressure chamber 4th shut off to the heating chamber 6 and lowered into the opening 12 Position (shown in Fig. 1 above) the suction chamber 11 towards the heating chamber 6 cordoned off.
- the gas guide devices 15 are operated as follows during operation:
- the heating elements arranged in the heating chamber 6 are switched off and then the cooling gas blower 3 switched on.
- the cooling gas blower builds up in the pressure chamber 4 to a certain dynamic pressure of the cooling gas.
- the hatches 13 are opened via the hatch actuations 14, so that a unhindered access to the heating chamber 6 is possible via the openings 12, as shown in Fig. 2b.
- Gas guiding elements 17 are designed as plates 19 provided with nozzles 18.
- the use of nozzles 18 as gas guide elements 17 is special Advantageous, since this enables a targeted and a predeterminable penetration depth having cooling gas flow to Charge 7 is possible.
- the heating chamber 6 In the operating position shown in Fig. 2c, the heating chamber 6 is over the cooling gas flowing in from the pressure chamber 4 is flooded.
- the hot Furnace gas as well as the heated cooling gas are over the opposite Opening 12 suctioned out to the suction chamber 11, because on this side Gas guide device 15 is in the upper position in which one unimpeded connection between the heating chamber 6 and the suction chamber 11 exists.
- the cooling gas is cooled back and passes through the Pressure chamber 4 again in the heating chamber 6.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Details (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
- Fig. 1
- einen Längsschnitt durch eine Ofenanlage;
- Fig. 2a
- einen Querschnitt entlang der Schnittlinie II-II in Fig. 1 geschnitten, die Luken in geschlossenem Zustand darstellend;
- Fig. 2b
- einen Querschnitt gemäß Fig. 2a, jedoch die Luken im geöffneten Zustand darstellend und
- Fig. 2c
- einen Querschnitt gemäß Fig. 2a und 2b, jedoch die Luken im geöffneten Zustand und mit einer abgesenkten Gasleiteinrichtung darstellend.
- 1
- Ofengehäuse
- 2
- Haube
- 3
- Kühlgasgebläse
- 4
- äußere Kammer (Druckkammer)
- 5
- Heizkammerwand
- 6
- Heizkammer
- 7
- Charge
- 8
- Ventilator
- 9
- Gaskühleinrichtung
- 10
- Wärmetauscher
- 11
- innere Kammer (Saugkammer)
- 12
- Öffnung
- 13
- Luke
- 14
- Lukenbetätigung
- 15
- Gasleiteinrichtung
- 16
- Tragrahmen
- 17
- Gasführungselement
- 18
- Düse
- 19
- Platte
Claims (4)
- Ofen zur Wärmebehandlung von Chargen metallischer Werkstücke, insbesondere Vakuumofen, mit einem Ofengehäuse (1) und einer darin unter Freilassung eines in eine äußere und eine innere Kammer (4, 11) unterteilten Zwischenraumes ausgebildeten Heizkammer (6), sowie mit einer innerhalb des Ofengehäuses (1) angeordneten Gaskühleinrichtung (9), die über die Kammern (4, 11) und in mindestens zwei Heizkammerwänden (5) ausgebildeten verschließbaren Öffnungen (12) mit der Heizkammer (6) zur Zu- und Abfuhr von Kühlgas verbunden ist, wobei die äußere, die Heizkammer (6) umgebende Kammer (4) als Druckkammer eines Kühlgasgebläses (3) und die innere, zwischen Heizkammer (6) und Gaskühleinrichtung (9) angeordnete Kammer (11) als Saugkammer des Kühlgasgebläses (3) ausgebildet ist,
dadurch gekennzeichnet,
daß im Bereich der Öffnungen (12) Gasleiteinrichtungen (15) höhenverstellbar so angeordnet sind, daß diese in der von den Öffnungen (12) abgehobenen oberen Position die Kühlgasströmung von der Druckkammer (4) zur Heizkammer (6) hin absperren und in der auf die Öffnungen (12) abgesenkten Position die Kühlgasströmung von der Saugkammer (11) zur Heizkammer (6) hin absperren und daß eine jede Gasleiteinrichtung (15) aus einem kastenförmigen Tragrahmen (16) besteht, in den auswechselbare Gasführungselemente (17) einsetzbar sind. - Ofen nach Anspruch 1, dadurch gekennzeichnet, daß das Gasführungselement (17) als eine mit Düsen (18) versehene Platte (19) ausgebildet ist.
- Ofen nach Anspruch 2, dadurch gekennzeichnet, daß die Düsen (18) des Gasführungselementes (17) einen trichterförmigen Einströmbereich aufweisen.
- Ofen nach Anspruch 1, dadurch gekennzeichnet, daß das Gasführungselement (17) als ein mit einer Vielzahl von Bohrungen versehenes Gleichrichtergitter ausgebildet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19526676 | 1995-07-21 | ||
DE19526676 | 1995-07-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0754768A1 EP0754768A1 (de) | 1997-01-22 |
EP0754768B1 true EP0754768B1 (de) | 2001-06-13 |
Family
ID=7767437
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96710008A Withdrawn EP0754769A1 (de) | 1995-07-21 | 1996-07-13 | Ofen zur Wärmebehandlung von Chargen metallischer Werkstücke |
EP96710009A Expired - Lifetime EP0754768B1 (de) | 1995-07-21 | 1996-07-13 | Ofen zur Wärmebehandlung von Chargen metallischer Werkstücke |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96710008A Withdrawn EP0754769A1 (de) | 1995-07-21 | 1996-07-13 | Ofen zur Wärmebehandlung von Chargen metallischer Werkstücke |
Country Status (4)
Country | Link |
---|---|
EP (2) | EP0754769A1 (de) |
AT (1) | ATE202152T1 (de) |
DE (2) | DE59607067D1 (de) |
ES (1) | ES2159710T3 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2322673A2 (de) | 2009-11-13 | 2011-05-18 | Ipsen International GmbH | Verfahren und Einrichtung zur Leitung der Strömung in Industrieöfen für die Wärmebehandlung von metallischen Werkstoffen/Werkstücken |
WO2012037905A1 (de) | 2010-09-24 | 2012-03-29 | Ipsen International Gmbh | Verfahren und einrichtung zur leitung der strömung in industrieöfen für die wärmebehandlung von metallischen werkstoffen/werkstücken |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19820083A1 (de) * | 1998-05-06 | 1999-11-11 | Ald Vacuum Techn Gmbh | Verfahren zum Abschrecken von Werkstücken und Wärmebehandlungsanlage zur Durchführung des Verfahrens |
US6533991B1 (en) * | 2000-06-20 | 2003-03-18 | Ipsen International, Inc. | Cooling gas injection nozzle for a vacuum heat treating furnace |
DE20208536U1 (de) | 2002-05-29 | 2002-09-05 | Schmetz GmbH, 58708 Menden | Wärmebehandlungsanlage |
JP4573290B2 (ja) * | 2003-10-17 | 2010-11-04 | 株式会社Ihi | 高圧熱処理炉 |
FR2864106B1 (fr) * | 2003-12-23 | 2006-08-11 | Etudes Const Mecaniques | Dispositif de trempe |
US8088328B2 (en) | 2008-06-13 | 2012-01-03 | Jones William R | Vacuum nitriding furnace |
DE102015011504A1 (de) | 2015-09-09 | 2017-03-09 | Ipsen International Gmbh | Vorrichtung zur Behandlung von metallischen Werkstücken mit Kühlgas |
CN118654480B (zh) * | 2024-08-20 | 2024-10-15 | 爱发科真空技术(沈阳)有限公司 | 一种扁式加热室节能型真空烧结炉 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3208574A1 (de) * | 1982-03-10 | 1983-09-22 | Schmetz Industrieofenbau und Vakuum-Hartlöttechnik KG, 5750 Menden | "vakuum-schachtofen" |
DE3215509A1 (de) * | 1982-04-26 | 1983-10-27 | Schmetz Industrieofenbau und Vakuum-Hartlöttechnik KG, 5750 Menden | Vakuum-kammerofen |
DE3224971A1 (de) * | 1982-07-03 | 1984-01-05 | Schmetz Industrieofenbau und Vakuum-Hartlöttechnik KG, 5750 Menden | Vakuum-schachtofen |
DE3321554C1 (de) * | 1982-07-16 | 1984-02-16 | Ipsen Industries International Gmbh, 4190 Kleve | Industrieofen zur Wärmebehandlung metallischer Werkstücke |
DE3346884A1 (de) * | 1983-12-23 | 1985-07-11 | Ipsen Industries International Gmbh, 4190 Kleve | Industrieofen zur waermebehandlung metallischer werkstuecke |
FR2651307B1 (fr) * | 1989-08-29 | 1993-12-17 | Traitement Sous Vide | Four de traitement thermique equipe de moyens de refroidissement perfectionnes. |
DE9311985U1 (de) * | 1993-08-11 | 1993-10-14 | Ipsen Industries International GmbH, 47533 Kleve | Ofen zur Wärmebehandlung von Chargen metallischer Werkstücke |
DE9400222U1 (de) * | 1994-01-08 | 1994-02-24 | Ipsen Industries International GmbH, 47533 Kleve | Mehrkammerofen mit kombinierter Abkühlung |
-
1996
- 1996-07-13 DE DE59607067T patent/DE59607067D1/de not_active Expired - Fee Related
- 1996-07-13 EP EP96710008A patent/EP0754769A1/de not_active Withdrawn
- 1996-07-13 DE DE1996128383 patent/DE19628383A1/de not_active Withdrawn
- 1996-07-13 ES ES96710009T patent/ES2159710T3/es not_active Expired - Lifetime
- 1996-07-13 EP EP96710009A patent/EP0754768B1/de not_active Expired - Lifetime
- 1996-07-13 AT AT96710009T patent/ATE202152T1/de not_active IP Right Cessation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2322673A2 (de) | 2009-11-13 | 2011-05-18 | Ipsen International GmbH | Verfahren und Einrichtung zur Leitung der Strömung in Industrieöfen für die Wärmebehandlung von metallischen Werkstoffen/Werkstücken |
DE102009052900A1 (de) | 2009-11-13 | 2011-05-19 | Ipsen International Gmbh | Verfahren und Einrichtung zur Leitung der Strömumg in Industrieöfen für die Wärmebehandlung von metallischen Werkstoffen/Werkstücken |
WO2012037905A1 (de) | 2010-09-24 | 2012-03-29 | Ipsen International Gmbh | Verfahren und einrichtung zur leitung der strömung in industrieöfen für die wärmebehandlung von metallischen werkstoffen/werkstücken |
Also Published As
Publication number | Publication date |
---|---|
ES2159710T3 (es) | 2001-10-16 |
ATE202152T1 (de) | 2001-06-15 |
EP0754768A1 (de) | 1997-01-22 |
DE19628383A1 (de) | 1997-02-06 |
EP0754769A1 (de) | 1997-01-22 |
DE59607067D1 (de) | 2001-07-19 |
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