DE102010019215A1 - Transportation system such as a conveyor is useful in a device for heating steel sheets to press-hardening - Google Patents
Transportation system such as a conveyor is useful in a device for heating steel sheets to press-hardening Download PDFInfo
- Publication number
- DE102010019215A1 DE102010019215A1 DE201010019215 DE102010019215A DE102010019215A1 DE 102010019215 A1 DE102010019215 A1 DE 102010019215A1 DE 201010019215 DE201010019215 DE 201010019215 DE 102010019215 A DE102010019215 A DE 102010019215A DE 102010019215 A1 DE102010019215 A1 DE 102010019215A1
- Authority
- DE
- Germany
- Prior art keywords
- press
- component
- transport
- conveyor
- hardening
- 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- Withdrawn
Links
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
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
- C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
-
- 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
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0012—Rolls; Roll arrangements
-
- 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
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
-
- 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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
- F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
-
- 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
- C21D1/62—Quenching devices
- C21D1/673—Quenching devices for die quenching
Abstract
Description
Zur Erwärmung von beschichteten Stahlblechen auf Presshärttemperatur von 950°C werden z. Zt. Rollenherdöfen eingesetzt. Die Beheizung der Rollenherdöfen erfolgt indirekt über Gasbrenner bzw. direkt über elektrische Widerstandsheizelemente, welche ober- bzw. unterhalb der Transportebene angeordnet sind. Der Transport des Wärmgutes erfolgt mit keramischen Transportrollen. Das zu transportierende Wärmgut wird entweder direkt auf den Rollen als auch indirekt über Warenträger durch den Ofen transportiert. Nachteilig bei dem direkten Transportkonzept ist, dass die Beschichtung, welche während des Aufheizprozesses schmilzt, sich teilweise in die Oberfläche der Transportrollen eindringt und die Rollen beschädigt. Bei dem Transport mit Warenträgern entsteht ein erheblicher Energieverlust, da die periodisch abgekühlten Warenträger zusammen mit dem Wärmgut erhitzt werden müssen. Die Warenträger sind ebenfalls ein Verschleißteil mit einer begrenzten Standzeit. Der Einsatz von umlaufenden Edelstahlkette hat sich bisher bei einer Temperatur bis zu 950°C als ungeeignet erwiesen. Unter der Berücksichtigung der Wirtschaftlichkeit werden ständig höhere Durchsätze in Verbindung mit kürzeren Taktzeiten gefordert für die Warmpressanlagen gefordert. Die daraus resultierenden Ofenlängen bei den herkömmlichen Erwärmungsmethoden stoßen immer häufiger an ihre Grenzen.For heating coated steel sheets to press hardening temperature of 950 ° C z. Zt. Roller hearth furnaces used. The heating of the roller hearth furnaces takes place indirectly via gas burners or directly via electrical resistance heating elements, which are arranged above or below the transport plane. The transport of the thermal material is carried out with ceramic transport rollers. The heat to be transported is transported either directly on the rollers as well as indirectly via goods carriers through the oven. A disadvantage of the direct transport concept is that the coating, which melts during the heating process, partially penetrates into the surface of the transport rollers and damage the rollers. When transporting with goods carriers, a considerable loss of energy, since the periodically cooled goods carriers must be heated together with the Wärmgut. The product carriers are also a wearing part with a limited service life. The use of circulating stainless steel chain has so far proved to be unsuitable at a temperature up to 950 ° C. Taking into account the economic efficiency constantly higher throughputs are required in connection with shorter cycle times required for the hot pressing plants. The resulting kiln lengths in conventional heating methods are increasingly reaching their limits.
Es besteht daher die Aufgabe, diese gravierenden Nachteile zu vermeiden.It is therefore the object to avoid these serious disadvantages.
Mit dem durch die Erfindung dargestellten Transportsystems kann auf die Warenträger verzichtet werden und mit dem veränderten effizienteren Erwärmungsprinzip und zusätzlich einer mehrspurigen Fahrweise kann die Ofenlänge deutlich reduziert werden.With the transport system represented by the invention can be dispensed with the goods carrier and with the modified more efficient heating principle and in addition a multi-lane driving style furnace length can be significantly reduced.
Transportsystem:Transport system:
Dies geschieht mit der Erfindung dadurch, dass hier anstelle der bekannten Rollen- oder Hubbalkenantriebe hier eine Kombination von reversierbaren Kettentransport und Hubbalken zum Einsatz kommt.This is done with the invention in that here, instead of the known roller or walking beam drives, a combination of reversible chain transport and lifting beam is used.
Die Transportkette im temperaturbelasteten Bereich besteht aus einem hitzbeständigem Edelstahl, welche horizontal über keramische Gleitelemente gezogen wird. An den Enden der Transportkette vor und hinter der Ofenanlage ist eine normale Rollenkette nach DIN befestigt, welche mittels Getriebemotoren horizontal reversiert. Die Kette wird jeweils nur auf Zug belastet, d. h. die Antriebe werden über schaltbare Kupplungen im Wechsel freigeschaltet. Wesentlich ist, dass die temperaturbelastete Edelstahlkette keine verschleißintensive Umlenkung erfährt. Die Kettenspannung erfolgt durch Spannrollen im Rücktrum der beiden Antriebe.The transport chain in the temperature-stressed area consists of a heat-resistant stainless steel, which is pulled horizontally over ceramic sliding elements. At the ends of the transport chain in front of and behind the kiln plant a normal roller chain is attached according to DIN, which reverses horizontally by means of geared motors. The chain is only loaded on train, d. H. the drives are activated by switchable couplings in alternation. It is essential that the temperature-loaded stainless steel chain undergoes no wear-intensive deflection. The chain is tensioned by tension rollers in the return run of the two drives.
Im Ofen sind zwischen den Transportketten pneumatisch betätigte Hubbalken angeordnet. Die Aufteilung der Hubbalken entspricht der Schrittlänge des durch den Ofen zu taktenden Wärmgutes. Die Hubbalken sind einzeln als auch gemeinsam ansteuerbar. Der Transport durch den Ofen geschieht nun in folgenden Schritten:
Das Wärmgut (im folgenden Bauteil 1–8) Bauteil 1 wird auf die Transportkette vor dem Ofen aufgelegt. Die Transportkette positioniert das Bauteil 1 bis auf Platz 1 im Ofen. Der Hubbalken von Platz 1 hebt das Bauteil 1 soweit an, sodass die Transportkette wieder zurückfahren kann. Das Bauteil 2 wird auf die Transportkette aufgelegt und bis unmittelbar vor das Bauteil 1 positioniert. Alle Hubbalken werden abgesenkt und Bauteil 1 + 2 werden auf Platz 1 + 2 in dem Ofen positioniert. Die Hubbalken werden angehoben und die Transportkette fährt unter Bauteilen wieder zurück zur Aufnahme des nächsten Bauteiles. Diese Vorgänge wiederholen sich bis zum Ofenauslauf. Zur Entnahme des Bauteiles 1 (jetzt letztes Bauteil im Ofen) werden die Hubbalken Platz 1–5 angehoben. Bauteil 7 wird einlaufseitig aufgelegt und die Transportkette positioniert Bauteil 1 vor Bauteil 6 und Bauteil 7 in den Ofenauslaufhals. Alle Hubbalken werden abgesenkt. Durch Vortakten der Transportkette wird Bauteil 1 auf den Entnahmeplatz am Ofenauslauf und alle weiteren Bauteil auf die vorgesehenen Plätze im Ofen positioniert. Bauteil 1 kann jetzt zur Presse hin entnommen werden. Optional ist am Ofenauslauf auch eine Hubgabel einsetzbar, welche die Chargierzeiten vom Bauteil bis zur Presse hin verkürzen kann.In the oven pneumatically operated lifting beams are arranged between the transport chains. The division of the lifting beam corresponds to the stride length of the heat to be cycled through the oven. The lifting beams are individually and jointly controllable. The transport through the oven now takes place in the following steps:
The thermal material (in the following component 1-8) component 1 is placed on the transport chain in front of the furnace. The transport chain positions the component 1 up to number 1 in the furnace. The lifting beam of position 1 raises the component 1 so far that the transport chain can drive back again. The component 2 is placed on the conveyor chain and positioned immediately before the component 1. All walking beams are lowered and components 1 + 2 are positioned in positions 1 + 2 in the furnace. The lifting beams are raised and the transport chain moves back under components to receive the next component. These processes are repeated until the oven outlet. To remove the component 1 (now the last component in the oven), the lifting beams are raised to positions 1-5. Component 7 is placed on the inlet side and the transport chain positioned component 1 before component 6 and component 7 in the Ofenauslaufhals. All walking beams are lowered. By pretacting the transport chain, component 1 is positioned on the unloading station on the kiln outlet and all other components on the designated places in the kiln. Component 1 can now be removed towards the press. Optionally, a lifting fork can be used at the kiln outlet, which can shorten the charging times from the component to the press.
Erwärmungssystem:Heating system:
Dies geschieht mit der Erfindung dadurch, dass hier anstelle der bekannten Strahlungserwärmung eine Kombination von Strahlungs- und Konvektionserwärmung eingesetzt wird. Die bisher erreichten Aufheizzeiten mittels Strahlung können durch die Kombination der beiden Erwärmungsverfahren (bis 950°C) nahezu halbiert werden. Notwendig sind der Einsatz von hochhitzebeständigen Ventilatoren, abriebfester Ofenisolierung, dichten Hubbalkensystemen und dem hitzebeständigem Düsensystem zur Verteilung und Übertragung der Wärmeenergie auf die Bauteile.This is done with the invention in that here instead of the known radiation heating a combination of radiation and convection heating is used. The heating times achieved so far by means of radiation can be almost halved by the combination of the two heating methods (up to 950 ° C). Necessary are the use of high-heat-resistant fans, abrasion-resistant furnace insulation, dense lifting beam systems and the heat-resistant nozzle system for the distribution and transfer of heat energy to the components.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201010019215 DE102010019215A1 (en) | 2010-05-04 | 2010-05-04 | Transportation system such as a conveyor is useful in a device for heating steel sheets to press-hardening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201010019215 DE102010019215A1 (en) | 2010-05-04 | 2010-05-04 | Transportation system such as a conveyor is useful in a device for heating steel sheets to press-hardening |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102010019215A1 true DE102010019215A1 (en) | 2011-11-10 |
Family
ID=44802770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE201010019215 Withdrawn DE102010019215A1 (en) | 2010-05-04 | 2010-05-04 | Transportation system such as a conveyor is useful in a device for heating steel sheets to press-hardening |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102010019215A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2667132A2 (en) | 2012-05-25 | 2013-11-27 | Benteler Automobiltechnik GmbH | Kiln assembly and method for operating the kiln assembly |
| WO2018019920A1 (en) | 2016-07-28 | 2018-02-01 | Autotech Engineering, Aie | Conveying through furnaces |
| DE102020116593A1 (en) | 2020-06-24 | 2021-12-30 | AICHELIN Holding GmbH | Heat treatment plant and process for the production of molded components |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE618452C (en) * | 1931-05-29 | 1935-09-09 | Benno Schilde Maschb Akt Ges | Discharge device for furnaces |
| DE675825C (en) * | 1935-06-28 | 1939-05-19 | Ofag Ofenbau Akt Ges | Pacemaker oven in conjunction with an ejector device |
| DE1192681B (en) * | 1962-06-13 | 1965-05-13 | Beteiligungs & Patentverw Gmbh | Walking beam furnace |
| DE102005057742B3 (en) * | 2005-12-02 | 2007-06-14 | Voestalpine Automotive Holding Gmbh | Method and device for heating steel components |
-
2010
- 2010-05-04 DE DE201010019215 patent/DE102010019215A1/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE618452C (en) * | 1931-05-29 | 1935-09-09 | Benno Schilde Maschb Akt Ges | Discharge device for furnaces |
| DE675825C (en) * | 1935-06-28 | 1939-05-19 | Ofag Ofenbau Akt Ges | Pacemaker oven in conjunction with an ejector device |
| DE1192681B (en) * | 1962-06-13 | 1965-05-13 | Beteiligungs & Patentverw Gmbh | Walking beam furnace |
| DE102005057742B3 (en) * | 2005-12-02 | 2007-06-14 | Voestalpine Automotive Holding Gmbh | Method and device for heating steel components |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2667132A2 (en) | 2012-05-25 | 2013-11-27 | Benteler Automobiltechnik GmbH | Kiln assembly and method for operating the kiln assembly |
| DE102012104537A1 (en) | 2012-05-25 | 2013-11-28 | Benteler Automobiltechnik Gmbh | Furnace plant and method for operating the furnace |
| WO2018019920A1 (en) | 2016-07-28 | 2018-02-01 | Autotech Engineering, Aie | Conveying through furnaces |
| JP2019524591A (en) * | 2016-07-28 | 2019-09-05 | オートテック・エンジニアリング・ソシエダッド・リミターダＡｕｔｏｔｅｃｈ Ｅｎｇｉｎｅｅｒｉｎｇ， Ｓ．Ｌ． | Transport through the furnace |
| JP7111628B2 (en) | 2016-07-28 | 2022-08-02 | オートテック・エンジニアリング・ソシエダッド・リミターダ | Conveyance through furnace |
| DE102020116593A1 (en) | 2020-06-24 | 2021-12-30 | AICHELIN Holding GmbH | Heat treatment plant and process for the production of molded components |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE102013104229B3 (en) | Device for press hardening of components | |
| EP3110981B1 (en) | Method and system for thermally treating elongate, flat metallic material, in particular aluminum rolled ingots, in a ring hearth furnace | |
| WO1997034844A1 (en) | Process and plant for hardening glass plates | |
| DE2605668B2 (en) | Continuous furnace for heating glass panes | |
| DE102011011258B4 (en) | Furnace plant and process for heat treatment of workpieces | |
| US3715556A (en) | Slab heating method and apparatus | |
| DE102010019215A1 (en) | Transportation system such as a conveyor is useful in a device for heating steel sheets to press-hardening | |
| WO2016124309A1 (en) | Method, furnace installation and system for the hot stamping of workpieces | |
| EP0361147B1 (en) | Continuous heat treatment furnace for articles, particularly for ceramic tubes | |
| EP0179050B1 (en) | Furnace for heat-treating light metal bars | |
| EP2707664B1 (en) | Device and method for drying work pieces | |
| US1738038A (en) | Recuperative annealing furnace | |
| DE102013021584B4 (en) | Process, furnace equipment and plant for form hardening of workpieces | |
| DE675825C (en) | Pacemaker oven in conjunction with an ejector device | |
| AT390322B (en) | DEVICE FOR HEATING STEEL PARTS | |
| DE553804C (en) | Tunnel kiln for firing ceramic goods | |
| CN105200212A (en) | Continuous and split type gas heating furnace for reinforcing steel bars | |
| US3489398A (en) | Welding rod handling and baking system | |
| DE102004022047B3 (en) | Continuous strand furnace for heat treating workpieces comprises a conveyor belt arrangement arranged in a high temperature zone of a heating chamber in the conveying direction to simultaneously move with the conveyor belt | |
| DE202011004524U1 (en) | Furnace plant for heat treatment | |
| DE973036C (en) | Continuous furnace with a chain or belt-shaped material conveyor | |
| DE1667394C3 (en) | Plant for silicon carbide production | |
| US952196A (en) | Apparatus for baking, glazing, or enameling brick, tile, or other articles. | |
| DE2726199A1 (en) | Tunnel kiln for baking ceramic prods. - which are stacked on refractory tiles travelling on rollers through kiln | |
| DE202009014174U1 (en) | Tunnel kiln with conveyor system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R163 | Identified publications notified | ||
| R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: F27B0003100000 Ipc: F27B0009240000 |
|
| R012 | Request for examination validly filed | ||
| R120 | Application withdrawn or ip right abandoned |