EP3253893A1 - Procédé, ensemble four et installation pour le formage à chaud de pièces - Google Patents

Procédé, ensemble four et installation pour le formage à chaud de pièces

Info

Publication number
EP3253893A1
EP3253893A1 EP16701244.2A EP16701244A EP3253893A1 EP 3253893 A1 EP3253893 A1 EP 3253893A1 EP 16701244 A EP16701244 A EP 16701244A EP 3253893 A1 EP3253893 A1 EP 3253893A1
Authority
EP
European Patent Office
Prior art keywords
workpieces
transfer
furnace
forming
space
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP16701244.2A
Other languages
German (de)
English (en)
Inventor
Peter Vervoort
Wilhelm Meyer
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 Thermal Solutions Gmbh&co KG
Eisenmann SE
Eisenmann Thermal Solutions Gmbh and Co KG
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 Thermal Solutions Gmbh&co KG, Eisenmann SE, Eisenmann Thermal Solutions Gmbh and Co KG filed Critical Eisenmann Thermal Solutions Gmbh&co KG
Publication of EP3253893A1 publication Critical patent/EP3253893A1/fr
Withdrawn legal-status Critical Current

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
    • C21D9/0006—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
    • 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
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • 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

Definitions

  • the invention relates to a system for the mold hardening of workpieces with a) a furnace device in which workpieces can be heated to a forming temperature; b) a forming device in which the heated workpieces are malleable; c) a transfer device, by means of which workpieces can be transferred from the furnace device to the forming device.
  • the invention relates to a method for the form hardening of workpieces, in which a) the workpieces are heated in a furnace device to a forming temperature; b) the workpieces are formed in a forming device; c) the workpieces are transferred from the oven device to the forming device.
  • Form hardening has become particularly established as a method for hot-forming 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, with a transfer device such as a multi-axis robot from the furnace device to a Umformein- handed over direction and formed there by a pressing tool in the desired component.
  • a forming temperature between about 800 ° C and 1100 ° C during so-called austenitization.
  • the forming temperature for steel sheets made from common boron-manganese steel alloys is 930 ° C.
  • such steel sheets are provided with an aluminum-silicon coating (AISi).
  • AISi aluminum-silicon coating
  • Such a sheet steel workpiece may be, for example, a flat steel sheet or board or even a sheet steel preformed in a previous step, for example by cold drawing.
  • the heated workpiece is formed in the forming device with a cooled pressing tool and quenched at the same time.
  • 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.
  • the workpieces On the way of the workpieces from the oven device to the forming device, the workpieces come regularly in contact with the ambient atmosphere and in particular with atmospheric oxygen.
  • the previously heated workpiece cools down.
  • the extent of this cooling depends on conversion parameters such as time, distance and / or speed, which prevail from the removal of the workpiece from the oven device to forming.
  • the quality of the components obtained during the molding process can vary considerably if different Oxygen come into contact with oxygen and be reshaped with different temperatures.
  • the transfer device is arranged in a transfer space, which is at least partially limited by a housing and largely bridges the space between the furnace device and the forming device.
  • a transfer room with a separate Ge housing is thus arranged between the furnace device and the forming device.
  • this transfer room there may be an atmosphere deviating from the ambient atmosphere.
  • a largely constant temperature can be maintained in the transfer room.
  • the housing must be able to do not limit the space completely. For example, may remain between the wall elements and the rig floor a gap, without this adversely affects the work atmosphere in the Kochga ⁇ beraum.
  • the housing may also be formed at least partially by flexible housing elements.
  • the housing comprises an access, via which one or more workpieces can be introduced into the transfer space.
  • the workpieces then do not get over the oven unit, which then possibly one of the
  • Transfer space lying inlet can be fed, but separately in the transfer room, and can be handled there by the transfer device.
  • the access is designed as an access lock, by means of which the atmosphere of the transfer room remains separated from the ambient atmosphere.
  • the temperature-lock region comprises a flow device, by means of which a fluid flow curtain can be generated in front of the furnace device.
  • the housing comprises an output, via which a workpiece removed from the oven device is connected to the container.
  • Formewed is deliverable and which by a
  • Gate unit is lockable or releasable. When transferring to the forming device, a connection of the transfer room to the environment can not be avoided. This compound can be, however, kept each time as short as possible when passing through an off ⁇ gang with a gate unit, so that an atmosphere of loss or a change in temperature that affect the operating conditions occurs only over the period of time for the transfer of the workpiece to the Forming device is needed.
  • the transfer device is preferably designed as Gelenkarmroboter. Preferably, this is positio ⁇ ned on the ground.
  • the transfer device can also be designed as a hanging system.
  • the volume of the transfer space is as small as possible. In order to avoid unneeded void volume, it may be advantageous if one or more Gearspringper housed in the transfer room.
  • Figure 1 is a side view of a system for the molding of
  • Figure 2 is a top view of the system of Figure 1;
  • Figure 3 is a side view of a modified system for
  • 2 denotes a total of a system for molding, in which workpieces 4 are formed into components 6.
  • the workpieces 4 are, for example, workpieces made of sheet steel, as explained above.
  • the plant 2 comprises a furnace device 8, in which the workpieces are heated to a forming temperature.
  • a workpiece 4 When a workpiece 4 has reached its forming temperature, it is removed from the oven device 8 with the aid of a transfer device 10 and transferred to a forming device 12.
  • This comprises, in a manner known per se, a cooled pressing tool 14, with which the workpiece 4 is deformed and quenched into the component 6 in a forming process.
  • the component 6 is released and removed by means of a removal device 16 from the forming device 12 and then its further determination, such as a mechanical post-processing supplied ,
  • the oven device 8 comprises a plurality of separate oven modules 20, each having its own module housing 22, which delimits a furnace chamber 24, which is illustrated by dashed lines in each case one of the oven modules. In the present embodiment, two furnace modules 20a, 20b are shown.
  • the oven chamber 24 is accessible via an opening 26 in the module housing 22 from the outside, which can be released or closed via a module door 28.
  • a not-shown workpiece carrier which stores a single workpiece 4 or a group of workpieces of two or more workpieces 4 during heating.
  • the workpiece carrier ensures proper positioning of the or. Workpieces 4 based on the furnace module 20 sure.
  • the workpiece carrier can in particular be made of reaction-bonded silicon-infiltrated silicon carbide.
  • Furnace modules 20a, 20b are illustrated, in each of which only a single workpiece 4 can be heated. This basically reflects the ideal case, but can not always be achieved, taking into account the required space requirements and the throughput rate of Annex 2. Therefore, if a workpiece group of two or more workpieces 4 are to be heated in a furnace module 20, the module housing 22 builds respectively correspondingly higher and the workpiece carrier provides a plurality of carrier floors. In this case, the module housing 22 can have a respective opening 26 at the level of each of these carrier levels and can be opened for each of these openings. 26 include a module door 28. Alternatively, it is also possible to bring a plurality of carrier shelves to a single opening 26 in a furnace module 20.
  • the furnace modules 20 of a system 2 need not be identical. There may also be various furnace modules 20 whose dimensions, in particular the volume of the furnace chamber 24 and the cross section of the opening or openings 26, are respectively adapted to different types of workpieces 4 or to a different number of workpieces 4 to be accommodated.
  • Each furnace module 20 operates autonomously and for this purpose carries at least one own heating device 30 with it.
  • the heating device 30 may be, for example, an electric heating unit with a heating coil.
  • IR radiators or gas burners or the like established heating techniques come into consideration.
  • a muffle may additionally be arranged in the furnace chamber 24 of a furnace module 20, which additionally encloses the workpiece carrier tightly.
  • the muffle can provide a uniform temperature distribution and protect the furnace chamber 24 and there special components of the heater 32 from impurities such as scale or coating components that can fall in the furnace module 20 from the workpieces 4.
  • a protection of heating components can be done without muffle on an encapsulation of the components in question; with a muffle this is not necessary, so that this structural complexity can be omitted and costs can be reduced if necessary.
  • Protective gas consumption is reduced because the muffle has a smaller volume than the furnace chamber 24. Also, the furnace walls not to the extent that is usually freed of oxygen and water.
  • Each oven module 20 is supplied via a line bundle 32 with necessary for operation electrical or fluid resources.
  • the line bundle 32 also includes fluid lines, via which an atmosphere gas injected into the oven chamber 24 or the furnace atmosphere can be sucked off.
  • the individual lines of the cable bundle 32 lead to the individual supply sources, which are not shown here specifically.
  • a not specifically shown process control monitors the proper operation and the parameters of the individual furnace modules 20.
  • Each furnace module 20 is equipped for this purpose with corresponding sensors which monitor the operating parameters of the furnace module 20 and send corresponding output signals to this process control.
  • the line bundle 32 includes for this purpose in addition to the mentioned supply lines corresponding data lines.
  • a fault occurs in a particular furnace module 20, for example if the heater 30 of a particular furnace module 20 fails, that furnace module 20 can be selectively detected.
  • the defective furnace module 20 can then be separated from the working process and maintained separately, without this significantly influencing the other course of the forming process or even temporarily leading to a standstill of the process.
  • an individual heating process can be run through from each workpiece 4, which can be controlled separately for each workpiece 4 via the process control.
  • the furnace modules 20 form a furnace unit 34, which may also include more than two furnace modules 20 or even a single furnace module 20 in not specifically shown modifications.
  • the transfer device 10, i. in the present embodiment, the transfer robot 18a, is arranged in a transfer space 36, which largely bridges the space between the furnace device 8 and the forming device 12.
  • the transfer space 36 is bounded by a housing 38 with housing walls 40, wherein the furnace modules 20 project through a housing wall 40 into the transfer space 36 such that their openings 26 can be reached by the transfer device 10.
  • the housing walls 40 are thermally insulated and may optionally be cooled by a separate device.
  • the transfer chamber 36 may have a different atmosphere than in the transfer area 36 surrounding environment of the system 2.
  • modification also means are provided with which a separate working atmosphere in the transfer room 36 can be constructed and / or maintained.
  • the atmosphere heats up in the transfer room through the hot, coming from the oven device 8 workpieces 4 and possibly by the exiting hot Furnace atmosphere until a largely constant operating temperature sets.
  • a tempering device can additionally be provided, by means of which a specific operating temperature can be generated and / or maintained in the transfer chamber 36.
  • a temperature lock region 42 is formed between the furnace device 8 and the transfer device 10.
  • a flow device 44 is provided, by means of which a fluid flow curtain 46 can be generated in front of the furnace unit 8.
  • an inert gas such as nitrogen is used in practice.
  • the fluid flow curtain 46 a temperature barrier between the furnace modules 20 and the transfer device 10 is formed.
  • the transfer device 10 is prevented from coming into contact with the hot atmosphere of the furnace modules 20, which is released when the module doors 28 are opened.
  • the housing 38 of the transfer space 36 further comprises an access 48, via which workpieces 4 are introduced into the transfer space 36.
  • the access 48 comprises a magazine carrier 50, which can accommodate a plurality of workpieces 4 to be processed.
  • only a single workpiece 4 can be introduced into the transfer space 36 from the outside via the access 48.
  • the housing 38 comprises an output 52 via which Chen a removed from a furnace module 20 workpiece 4 can be transferred to the forming device 12.
  • the output 52 can be closed or opened by a gate unit 54.
  • FIG. 3 shows, as a further exemplary embodiment, a system 2 'in which components and components which correspond to components and components of the system 2 according to FIGS. 1 and 2 bear the same reference numerals.
  • an oven lock area 42 can be provided in a manner corresponding to that of the installation 2.
  • the transfer device 10 is not designed as Gelenkarmroboter 18, but as a hanging system 56 with a movable telescopic arm 58 which can be moved by means of a drive 60 in rails 62 and rotated about a vertical axis.
  • the rails 62 are arranged on the ceiling of the transfer room 36.
  • the telescopic arm 58 carries at its lower end a gripping unit 64, with which workpieces 4 can be gripped.
  • the access 48 is formed in the system 2 'as an access lock 66, so that the atmosphere of the transfer room remains there separated from the ambient atmosphere.
  • a corresponding access lock can also be provided in the system 2 according to FIGS. 1 and 2.
  • packing bodies 68 can be accommodated in the transfer space 36, of which three packing bodies 68 are shown by way of example only in FIG.
  • the plants 2, 2 'work as follows: Workpieces 4 are introduced through the access 48 into the transfer space 36.
  • the transfer device 10 picks up a work piece ⁇ 4 of the magazine carrier 50 and places the workpiece 4 in an oven module 20 from. While this workpiece 4 is brought to its forming temperature, the transfer device 10 loads the second furnace module 20 with another workpiece. 4
  • the transfer device 10 removes the workpiece 4 and passes it through the open gate unit 54 at the output 52 to the forming device 12, where the workpiece 4 formed into a component 6 and then further promoted by the removal device 16 becomes.
  • the transfer device 10 picks up another workpiece 4 and places it in the now free furnace module 20. Such a cycle is repeated, with the furnace modules 20 being alternately charged and emptied accordingly.
  • the furnace device 8 comprises furnace modules 20 into which the transfer robot 18a has to reach in order to remove a workpiece 4.
  • a module concept can be implemented in which the workpiece 4 is already brought out of the oven chamber 24 before the transfer robot 18a receives the workpiece 4.
  • This can be realized for example by a kind of drawer solution, in which a carrier drawer can move out of the oven chamber 24 together with the workpiece 4, so that the transfer robot 18a outside the furnace chamber 24 receives access to the workpiece 4.
  • the oven device 8 may be at a not specifically shown Modification may also be designed as a continuously operating roller furnace, as already mentioned at the outset.
  • the transfer device 10 is arranged with all the essential components and components within the transfer chamber 36.
  • these movable components are given, for example, by the robot arm, which does not bear its own reference numeral.
  • a functional connection between the components outside and inside the transfer space 36 may be formed through a housing wall 40.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Tunnel Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Articles (AREA)
  • Furnace Details (AREA)

Abstract

L'invention concerne une installation pour le formage à chaud de pièces qui comprend un ensemble four (8), dans lequel les pièces (4) peuvent être chauffées à une température de formage et un dispositif de formage (12), dans lequel les pièces (4) chauffées peuvent être formées. Au moyen d'un dispositif de transfert (10), les pièces (4) peuvent être transférées de l'ensemble four (8) vers le dispositif de formage (12). Le dispositif de transfert (10) est placé dans un espace de transfert (36), lequel est au moins partiellement limité par un boîtier (38) et qui couvre largement l'espace entre l'élément four (8) et le dispositif de formage (12). L'invention concerne également un procédé pour le formage de pièces (4).
EP16701244.2A 2015-02-06 2016-01-15 Procédé, ensemble four et installation pour le formage à chaud de pièces Withdrawn EP3253893A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015001408.0A DE102015001408A1 (de) 2015-02-06 2015-02-06 Anlage zum Formhärten von Werkstücken
PCT/EP2016/000075 WO2016124309A1 (fr) 2015-02-06 2016-01-15 Procédé, ensemble four et installation pour le formage à chaud de pièces

Publications (1)

Publication Number Publication Date
EP3253893A1 true EP3253893A1 (fr) 2017-12-13

Family

ID=55221377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16701244.2A Withdrawn EP3253893A1 (fr) 2015-02-06 2016-01-15 Procédé, ensemble four et installation pour le formage à chaud de pièces

Country Status (6)

Country Link
US (1) US20180002774A1 (fr)
EP (1) EP3253893A1 (fr)
JP (1) JP2018511485A (fr)
CN (1) CN107257865A (fr)
DE (1) DE102015001408A1 (fr)
WO (1) WO2016124309A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109439853A (zh) * 2018-11-01 2019-03-08 天津中德应用技术大学 新型低合金超高强度钢及形变热处理工艺
DE102020213991A1 (de) 2020-11-06 2022-05-12 Dürr Systems Ag Verfahren zum Betreiben einer Behandlungsanlage und Behandlungsanlage
CN114850270A (zh) * 2021-02-03 2022-08-05 苏州汇富弘自动化科技有限公司 冲压装置、转移装置、自动化冲压设备及工件转移方法
DE102021003946A1 (de) 2021-07-30 2023-02-02 Neuman Aluminium Austria Gmbh Verfahren zur wärmebehandlung metallischer halbzeuge und wärmebehandlungssystem

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7254977B2 (en) * 2004-01-20 2007-08-14 Pullman Industries, Inc. Coolant delivery system and continuous fabrication apparatus which includes the system
US7503116B2 (en) * 2004-01-20 2009-03-17 Noble Advanced Technologies, Inc. Continuous process for producing a shaped steel member
DE102004028236B3 (de) * 2004-06-11 2005-11-17 Rolf-Josef Schwartz Verfahren und Vorrichtung zum Erwärmen von Werkstücken vor der Warm- oder Halbwarmumformung
DE102009026251A1 (de) * 2009-07-24 2011-02-03 Thyssenkrupp Steel Europe Ag Verfahren und Vorrichtung zum energieeffizienten Warmumformen
CN103403195B (zh) * 2011-01-17 2016-05-04 塔塔钢铁艾默伊登有限责任公司 一种热成型部件的方法，以及如此成型的部件
DE102012112334A1 (de) * 2012-12-14 2014-06-18 Manuela Braun Warmumformvorrichtung
CN103785734B (zh) * 2014-01-28 2016-05-11 无锡红弦汽车轻量化科技有限公司 热成形钢管分段强化类零件的压力冷却工艺及模具液压装置
DE102014109883B4 (de) * 2014-07-15 2023-05-04 Manuela Braun Umformeinrichtung zum Umformen und nachfolgenden Presshärten eines Blechzuschnitts oder eines vorgeformten Halbzeugs aus Stahl sowie damit hergestelltes Stahlwerkstück

Also Published As

Publication number Publication date
CN107257865A (zh) 2017-10-17
US20180002774A1 (en) 2018-01-04
JP2018511485A (ja) 2018-04-26
DE102015001408A1 (de) 2016-08-11
WO2016124309A1 (fr) 2016-08-11

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