[go: up one dir, main page]

WO2019192894A1 - Structure support, ensemble four, installation de traitement et procédé de traitement de pièces - Google Patents

Structure support, ensemble four, installation de traitement et procédé de traitement de pièces Download PDF

Info

Publication number
WO2019192894A1
WO2019192894A1 PCT/EP2019/057578 EP2019057578W WO2019192894A1 WO 2019192894 A1 WO2019192894 A1 WO 2019192894A1 EP 2019057578 W EP2019057578 W EP 2019057578W WO 2019192894 A1 WO2019192894 A1 WO 2019192894A1
Authority
WO
WIPO (PCT)
Prior art keywords
workpieces
support structure
furnace
porous
support
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.)
Ceased
Application number
PCT/EP2019/057578
Other languages
German (de)
English (en)
Inventor
Arian Esfehanian
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.)
Eisenmann SE
Original Assignee
Eisenmann SE
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 Eisenmann SE filed Critical Eisenmann SE
Publication of WO2019192894A1 publication Critical patent/WO2019192894A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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 being carried by a conveyor
    • F27B9/2407—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 being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
    • 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
    • F27D3/02—Skids or tracks for heavy objects
    • F27D3/026—Skids or tracks for heavy objects transport or conveyor rolls for furnaces; roller rails

Definitions

  • the invention relates to a support structure for supporting and / or conveying workpieces, in particular of metallic workpieces, in particular of AISi-coated steel sheets, in a furnace device at temperatures above 600 ° C, wherein the support structure defines a support surface for the workpieces.
  • the invention relates to a furnace device for heating such workpieces to temperatures above 600 ° C with a) a furnace chamber or an oven tunnel; b) a supporting structure for carrying and / or conveying the workpieces,
  • the invention is concerned with a system for the mold hardening of such workpieces with a) a furnace device in which workpieces can be heated to a forming temperature above 600 ° C; b) a forming device, in which the heated workpieces are malleable, and with a method for the form hardening of such workpieces, in particular of metallic workpieces, in particular of AlSi-coated steel sheets, in which a) the workpieces in a furnace device to a forming temperature be heated above 600 ° C; b) the workpieces are formed in a forming device.
  • Mold hardening has become particularly established as a method for hot working of workpieces made of metal into components, in particular in the automotive industry, and is also familiar under the terms press hardening or hot stamping.
  • the workpieces to be formed are heated in a furnace device, transferred with a transfer device such as a multi-axis robot from the Ofenein direction to a forming device and formed there by a pressing tool in the desired component.
  • a corresponding furnace device may be a continuous furnace, for example in the form of a roller furnace or roller hearth furnace, in which the support structures of the type mentioned for the workpieces are designed as support rollers on de nen the workpieces rest in the oven.
  • the support structures of the type mentioned for the workpieces are designed as support rollers on de nen the workpieces rest in the oven.
  • batch ovens with single nen furnace chambers are known, each having a single access over which the workpieces are moved into the oven chamber and also out again.
  • Support structures for the workpieces are in this case either support plates, which constantly remain in a furnace chamber, or workpiece carriers, which receive the workpieces and are moved with the workpieces into and out of the furnace chamber.
  • a strut over which a workpiece for storage in the oven can be slipped, is to be understood as a support structure of the type mentioned.
  • workpieces are usually used, which are provided with egg ner protective coating, which, inter alia, a corrosion protection and heat and oxidation resistance of the workpiece cause.
  • the coated workpieces lie directly on the support surface of the support structures, which can lead to thermo-chemical reactions of the protective coating and each support structure.
  • the present invention will erläu example of workpieces made of steel, which are coated with an aluminum-silicon alloy, for which above and hereinafter the abbreviation AISi coating is used.
  • the invention is described by way of example with reference to a furnace treatment of these workpieces in a corresponding continuous furnace, in which the workpieces, usually in an oxygen-free atmosphere, at temperatures above 600 ° C and at a so-called austenitization to a forming temperature between about 800 ° C and 1 100 ° C are heated.
  • the forming temperature for steel sheets made from common boron-manganese-steel alloys is 930 ° C.
  • a steel sheet workpiece can be, for example, a flat sheet steel plate or a plate or else a preformed sheet steel part already in a preceding step, for example by cold deep drawing. Subsequently, he warmed workpiece in the forming device with a cooled pressing tool formed and quenched at the same time. As a result, the material structure changes during the molding process and the components obtained have a considerably higher strength and rigidity than components that have been cold-formed from the workpiece.
  • support rollers made of sintered mullite or fused quartz verwen.
  • the support surface is defined by an outer lateral surface.
  • the AISi coating of the workpieces melts, with the aluminum reacting with oxygen at temperatures of about 650 ° C to form aluminum oxide AI2O3.
  • the oxygen required for this purpose is dissolved out of the material of the support structures, in particular if there is no free oxygen in the furnace atmosphere.
  • a layer of A Os is formed.
  • this layer bursts due to the mechanical load on the workpieces during transport, as a result of which the underlying AISi coating can again come into direct contact with the supporting structures, which are thereby increasingly damaged in the manner explained.
  • AlSi melt can penetrate into the material structure of the supporting structures, which can lead to sig nificant local density differences in the support structures, which can lead to breakage of the supporting structures.
  • This object is achieved in a support structure of the type mentioned above in that the support structure has at least one porous region of a material which is accessible through the support surface.
  • the porous area is accessible in this way for a fluid, in particular flowable, foreign material, which does not originate from the support structure.
  • a foreign material may be present, for example, in the form of the AlSi melt, which results from the heat treatment of AlSi-coated workpieces. Inven tion accordingly is not trying to prevent penetration of such foreign material into the support structure into it. Rather, the structure of the support structure is designed so that a receiving reservoir for the foreign material off the support surface is available, so that the foreign material is led away from the support surface. This will be explained again below.
  • the porous area is flexible or rigid.
  • a flexible area may have advantages in applying the porous area to a core.
  • a rigid porous area contributes to the stability of the support structure.
  • the material of the porous region is preferably an oxide or Vietnameseoxidi specific ceramic, in particular alumina Al2O3, mullite AI2AI2 + 2X S12-2 X X ⁇ 10 one-touch, Silici- umcarbid SiC or silicon dioxide S1O 2, or a metallic material.
  • a good intake of foreign material is si cherstrut when the material in the porous area foam, fiber, wire, cavity, hollow sphere, honeycomb structures or the like forms having open cavities.
  • the porous area is a porous outer layer, which is the support surface before; or b) the porous region forms the support structure and predetermines the support surface; or c) the porous region is an inner porous layer adjacent to an outer layer that defines the bearing surface.
  • the support structure is a support roller with egg nem roller body, which comprises the porous area and in which the Aufla ge
  • the porous region is a porous outer sheath layer which defines the Tragman telology; or b) the porous region forms the roller body and predetermines the bearing surface; or c) the porous region is a porous inner cladding layer of the roll body adjacent to an outer cladding layer defining the cladding surface.
  • the above-mentioned object with the corresponding advantages is achieved in that the support structure is formed with some or all of the above-mentioned features.
  • the furnace device is a roller kiln or a roller hearth furnace with the furnace tunnel and a conveyor system, by means of which the workpieces can be conveyed through the kiln tunnel in a conveying direction and which comprises carrying rollers of the type described above as a supporting structure.
  • the above object is achieved in that the furnace device realizes some or all of the features of the above-described furnace device.
  • the solution of the above task given by the fact that a corresponding furnace device is used.
  • Figure 1 is a side view of a system for the molding of workpieces with egg ner furnace device and a forming device;
  • Figure 2 is a top view of the system of Figure 1;
  • FIG. 3 shows a section of the furnace device along the section line III-III in Figure 2, in which a support roller of a conveyor system can be seen, which is a
  • roller body having an outer bearing surface the Rol steering body also has an accessible by the supporting surface area Porö sen area;
  • Figure 4 is a cross-sectional and perspective view of a portion of a first embodiment of such a support roller in which the porous portion is formed by a porous outer jacket layer surrounding a roller core;
  • Figure 5 is a cross-sectional and a perspective view of a portion of a second embodiment of a support roller, wherein the porous Be rich forms the reel body;
  • Figure 6 is a perspective view and a partial longitudinal section of a portion ei nes third embodiment of a support roller, wherein the porous region is formed by an inner cladding layer, which is surrounded by an outer sheath layer with passages.
  • Figure 7 shows a fourth embodiment of a support roller with a modified geometry of the outer bearing surface.
  • FIGS. 1 to 3 10 designates as a whole an apparatus for form hardening, in which workpieces 12 are formed into components 14.
  • the workpieces 12 are, for example, metallic workpieces 12 and in particular workpieces 12 made of AlSi-coated steel sheet, as explained above.
  • the system 10 comprises a furnace device 16, in which the workpieces 12 are heated to a forming temperature, as explained above above 600 ° C and especially between 800 ° C and 1000 ° C, with common boron-manganese steel alloys at 930 ° Cliegt.
  • a forming temperature as explained above above 600 ° C and especially between 800 ° C and 1000 ° C, with common boron-manganese steel alloys at 930 ° Cliegt.
  • the austenitizing element likewise explained in the introduction is heated to a forming temperature of between approximately 800 ° C. and 1 100 ° C.
  • a workpiece 12 When a workpiece 12 has reached its forming temperature, it is removed by means of egg ner transfer device 18 from the oven device 16 and passed to a forming device 20.
  • This comprises, in a manner known per se, a cooled pressing tool 22 with which the workpiece 12 is formed and quenched in a shaping process into the component 14.
  • the component 14 After a given residence time in the pressing tool 22, in which the now produced component 14 cools to a final temperature, the component 14 is released and with the aid of a removal device 24 from the forming device 20 entnom men and then its further purpose, such as a mechanical rule Post-processing, fed.
  • the oven device 16 comprises an oven tunnel 28, which is delimited by a thermally insulated oven housing 30 and extends between an inlet 32 and an outlet 34 of the oven device 16.
  • the input 32 and the output 34 can be released or closed by a respective furnace gate 36.
  • an entrance lock and / or an exit lock may also be present in a manner known per se.
  • the furnace device 16 comprises a conveyor system 38, by means of which the workpieces 12 are conveyed through the furnace tunnel 28 in a conveying direction 40 shown only in FIG.
  • the conveyor system 38 includes a plurality of support structures 42, the roles in the present embodiment in the form of support 44 are present.
  • the support rollers 44 are transversely and in the present Ausry approximately at an angle of 90 ° to the conveying direction 40 is arranged one behind the other and together define a conveyor plane 46.
  • Each support structure 42 defines a support surface 48 for the workpieces 12th
  • a roller body 50 having a longitudinal axis 52 and two coaxial bearing shafts 54 are provided at both ends thereof.
  • the roller body 50 at its Wenning end faces connecting bushes 56, in which the bearing axles 54 are each inserted and secured such that the bearing axes 54 and the Rol steering body 50 are rotatably connected to each other.
  • the bearing surface 48 of the support structure 42 is formed in the support roller 44 by a circumferentially outermost lying bearing surface 58 of the roller body 50, on which workpieces 12 to be transported rest.
  • the bearing shafts 54 of the support rollers 44 are guided by complementary thereto through 60 on both sides of the furnace housing 30 through in an area except half of the furnace tunnel 28, where they are mounted with the aid of bearings 62 rotating bar.
  • a drive system 64 is also formed, with which support rollers 44 can be driven. In this case, in a manner known per se, either all carrying rollers 44 or only some of the carrying rollers 44 of the conveying system 38 can be driven. In the latter case, the non-driven support rollers 44 passive pass.
  • the support structures 42 comprises at least one, i. one or more porous areas 68 which are accessible through the support surface 48.
  • porous areas 68 which are accessible through the support surface 48.
  • the porous region 68 is formed of a material 70. In the support rollers 44, this porous region 68 is consequently accessible through the supporting jacket surface 58. As mentioned above, the porous region 68 is accessible to a fluid, in particular free-flowing, foreign material, which does not originate from the support structure 42. Such foreign material can be found, for example, in the form of the AlSi
  • the porous region 68 defines an interior surface 72 that defines one or more pore spaces 74.
  • the porous region 68 is capable of receiving the AlSi melt, or more generally, the foreign material, without the AlSi being incorporated into the material structure
  • the support structure 42 thus has a base porosity which is already present after production and before the first use of the support structure 42 and not only during use of the support structure 42, for example by the above-described dissolution of oxygen and related changes in the material structure, forms.
  • the porous region 68 is preferably rigid.
  • the material 70 of the porous region 68 is preferably an oxide or non-oxidic ceramic which is resistant to high temperatures and to thermal shock. These include, for example, in particular special alumina AI2O3, mullite Al2Al2 + 2xSi2-2xOio-x, silicon carbide SiC and Silio ⁇ ciumdioxid S1O2.
  • the material 70 may also be a metallic material.
  • the material 70 may also be a composite material or a mixed material, which are formed from a plurality of material components or comprise a plurality of material components.
  • the material 70 may form in the porous regions 68 foam, fiber, wire, cavity, hollow sphere, honeycomb structures and the like, which have open Kavitä th, in which the foreign material, in particular the AlSi melt, hin- can flow into it.
  • the material 70 may be aluphilic or aluphobic.
  • the porous region 68 particularly in the case of AlSi as a foreign material, allows a thermo-chemical reaction as described above.
  • the foreign material in particular an AlSi melt, is taken up in the pore spaces 74 and is then surrounded by the material 70 reaction-free or at least largely free reaction.
  • the support structure 42 from outside to inside the porous region 68 in the form of a porous outer layer 76 of the material 70, which defines the support surface 48, and a ran adjacent thereto core layer 78.
  • the core layer 78 in turn be composed of two or more layers again.
  • the porous outer layer 76 is a porous outer jacket layer 80 of the roller body 50 of the material 70, which defines the bearing surface 58 of the support roller 44;
  • the core layer 78 is a roll core 82 surrounded by the outer cladding layer 80.
  • the roll core 82 can in turn be constructed from a material as a solid shaft or modified from two or more layers or also be designed as a hollow tube.
  • the connecting bushes 56 are incorporated in the roll core 82.
  • the roller body 50 of the support roller 44 thus includes the porous outer sheath layer 80 with the carrier shell surface 58 and the roll core 82.
  • the support structure 42 as such forms the porous region 68, is thus formed from the material 70 and accordingly also specifies the support surface 48.
  • the porous region 68 accordingly forms the roller body 50, which as such is made of the material 70 and also the support shell. area 58 defined.
  • the support roller 44 may also be made entirely of the material 70 and thereby specify the total porous area 68.
  • the support structure 42 comprises, from the outside inwards, an outer layer 84 with through-channels 86 which predetermines the support surface 48 and the porous region 68 in the form of an inner porous layer 88 made of the material 70 which adjoins the outer layer 84 borders.
  • the outer layer may be made of a metal, for example.
  • the outer layer 84 is an outer sheath layer 90 with the passageways 86 and the inner porous layer 88, a porous inner sheath layer 92 of the material 70.
  • FIG. 7 illustrates as a fourth exemplary embodiment a carrying roller 44 with a modified geometry.
  • This support roller 44 has provided in the longitudinal direction in regelzeßi gene intervals circumferential grooves 94, so that the support surface 58 is formed by circumferential outer rings 96 which remain between the circumferential grooves 94. As a result, the support surface for the workpieces 12 is reduced. A resulting AlSi melt can quickly drain into the circumferential grooves 94 of the workpiece 12. Otherwise, the support roller 44 with the circumferential grooves 94 may have the same layer structure, as shown in Figures 4 to 6 and described above.
  • a plurality of existing layers and / or the roll core 82 may comprise the layers and / or the roll core 82 from a and the same material 70, which is present in the individual layers and optionally the roll core 82 with a different morphology.
  • the porous region or regions 68 are saturated with foreign material, principally AlSi, so that the supporting structure 42 can no longer develop its target effect.
  • the porous regions 68 can be removed and replaced.
  • the porous regions 68 form a kind of shell around the roll core 82; this shell can then be removed and replaced with a new shell in the form of the porous area.
  • the roll core 82 can then continue to be used.
  • Such a shell can be wound or pushed onto the roll core 82 in the case of a kind of porous mat; optionally, it can be glued to the roll core 82 with a high temperature adhesive.
  • such an envelope may optionally be wound, printed and affixed to the roll core 82 by means of perforated plates, grid plates, mesh or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)

Abstract

L'invention concerne une structure support pour supporter et/ou transporter des pièces (12), en particulier des pièces métalliques, en particulier des tôles en acier revêtues d'AlSi, dans un ensemble four (16) à des températures supérieures à 600 °C. La structure support définit une surface de repos (48) pour les pièces (12). La structure support (42) présente au moins une zone poreuse (68) en un matériau (70), qui est accessible en passant par la surface de repos (48). La structure support (42) est conçue de cette manière pour un ensemble four destiné à chauffer des pièces (12) à des températures supérieures à 600 °C, comportant une chambre de four et un tunnel de four (28) ainsi qu'une structure support (42) pour le support et/ou le transport des pièces (12). L'invention concerne une installation pour l'emboutissage à chaud de pièces (12), en particulier de pièces métalliques, en particulier de tôles d'acier revêtues d'AlSi, qui comprend un ensemble four (16), dans lequel des pièces (12) peuvent être chauffées à une température de formage supérieure à 600 °C, et un dispositif de formage (20), dans lequel les pièces (12) chauffées peuvent être formées. L'installation comprend un ensemble four correspondant. L'invention concerne en outre un procédé d'emboutissage à chaud de pièces (12), en particulier de pièces métalliques, en particulier de tôles d'acier revêtues d'AlSi, selon lequel les pièces (4) sont chauffées à une température de formage supérieure à 600 °C dans un ensemble four (8), et les pièces (4) sont formées dans un dispositif de formage (12). Un tel ensemble four y est utilisé.
PCT/EP2019/057578 2018-04-05 2019-03-26 Structure support, ensemble four, installation de traitement et procédé de traitement de pièces Ceased WO2019192894A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018108063.8A DE102018108063A1 (de) 2018-04-05 2018-04-05 Tragstruktur, Ofeneinrichtung, Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102018108063.8 2018-04-05

Publications (1)

Publication Number Publication Date
WO2019192894A1 true WO2019192894A1 (fr) 2019-10-10

Family

ID=65991800

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/057578 Ceased WO2019192894A1 (fr) 2018-04-05 2019-03-26 Structure support, ensemble four, installation de traitement et procédé de traitement de pièces

Country Status (2)

Country Link
DE (1) DE102018108063A1 (fr)
WO (1) WO2019192894A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021134319A1 (de) * 2021-12-22 2023-06-22 Schwartz Gmbh Rollenherdofen mit konturierter Transportrolle
DE102022107131A1 (de) 2022-03-25 2023-09-28 Voestalpine Metal Forming Gmbh Verfahren und Vorrichtung zum Erzeugen gehärteter Stahlblechbauteile

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1389852A (en) * 1971-02-08 1975-04-09 Uss Eng & Consult Heat-treating-furnace roll and method of heat-treating metal strip
JPH11302029A (ja) * 1998-04-23 1999-11-02 Asahi Glass Co Ltd リボン状ガラスの搬送方法および板ガラス製造方法
WO2011009769A1 (fr) * 2009-07-24 2011-01-27 Thyssenkrupp Steel Europe Ag Procédé et dispositif de formage à chaud éconergétique
DE102010016046A1 (de) * 2010-03-19 2011-09-22 Alexander Stark Transportrolle
DE202012013282U1 (de) * 2012-09-04 2015-11-20 Schwartz Gmbh Tragmittel für Öfen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4041217A1 (de) * 1989-12-23 1991-07-11 Reining Heisskuehlung Gmbh & C Durchlaufofen und verfahren zur wartung der rollen eines durchlaufofens
FR2821857B1 (fr) * 2001-03-06 2004-07-30 Usinor Rouleau destine au transport d'une bande metallique dans une installation de recuit continu

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1389852A (en) * 1971-02-08 1975-04-09 Uss Eng & Consult Heat-treating-furnace roll and method of heat-treating metal strip
JPH11302029A (ja) * 1998-04-23 1999-11-02 Asahi Glass Co Ltd リボン状ガラスの搬送方法および板ガラス製造方法
WO2011009769A1 (fr) * 2009-07-24 2011-01-27 Thyssenkrupp Steel Europe Ag Procédé et dispositif de formage à chaud éconergétique
DE102010016046A1 (de) * 2010-03-19 2011-09-22 Alexander Stark Transportrolle
DE202012013282U1 (de) * 2012-09-04 2015-11-20 Schwartz Gmbh Tragmittel für Öfen

Also Published As

Publication number Publication date
DE102018108063A1 (de) 2019-10-10

Similar Documents

Publication Publication Date Title
EP2324938B1 (fr) Procédé et installation de formage à chaud destinés à la fabrication d'une pièce usinée durcie et déformée à chaud
DE2920719C2 (de) Verfahren zur Herstellung von dichten, niedrig legierten Sinterteilen
EP3080055B1 (fr) Procédé de fabrication d'un substrat métal-céramique
EP0292738A2 (fr) Presse à double bande à parties pouvant être chauffées ou refroidies et procédé pour leur fabrication
DE3201417A1 (de) Transportwalze und transportwalzenstrecke zum transport von heissem material
EP2348205A2 (fr) Corps tubulaire et système d'échappement
WO2019192894A1 (fr) Structure support, ensemble four, installation de traitement et procédé de traitement de pièces
EP0146079A2 (fr) Pièce réfractaire perméable aux gaz
DE2722065A1 (de) Ofen zum isostatischen warmpressen
DE102012221120B4 (de) Rollenherdofen und Verfahren zur Wärmebehandlung von metallischen Blechen
DE102009050879B3 (de) Verfahren und Vorrichtung zur Erwärmung von Platinen
WO2001019560A1 (fr) Procede de production d'un corps a nid d'abeilles fritte
DE10042569C1 (de) Verfahren und Einrichtung zur Herstellung von Verbundwerkstoffen mit einem Kern aus Metallschaum
DE102008023052A1 (de) Brennkammerwand bzw. Heißgaswand einer Brennkammer und Brennkammer mit einer Brennkammerwand
DE966177C (de) Walze zum Foerdern von Werkstuecken in industriellen Waermoefen
EP2818571B1 (fr) Incorporation par diffusion de silicium-aluminium dans une bande de tôle d'acier
EP0279185A1 (fr) Rouleau transporteur pour arche de recuisson
WO2013143534A1 (fr) Four tunnel
EP2439474B1 (fr) Dispositif de séchage d'un élément de machine doté d'une chambre sèche sous vide
EP2703759A1 (fr) Moyen de support d'un four
DE102017125473B3 (de) Verfahren und Vorrichtung zur Herstellung von partiell gehärteten Stahlblechbauteilen
DE3427707C2 (de) Innengekühlte Rolle
DE102016109095B4 (de) Vorrichtung und Verfahren zum partiellen Härten von Stahlblechbauteilen
DE202012013282U1 (de) Tragmittel für Öfen
DE102013102797A1 (de) Tunnelofen

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19714380

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19714380

Country of ref document: EP

Kind code of ref document: A1