EP3212346A1 - Outil de formage servant à produire des pièces formées à chaud - Google Patents

Outil de formage servant à produire des pièces formées à chaud

Info

Publication number
EP3212346A1
EP3212346A1 EP15787146.8A EP15787146A EP3212346A1 EP 3212346 A1 EP3212346 A1 EP 3212346A1 EP 15787146 A EP15787146 A EP 15787146A EP 3212346 A1 EP3212346 A1 EP 3212346A1
Authority
EP
European Patent Office
Prior art keywords
tool
insert
component
mold
recess
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.)
Granted
Application number
EP15787146.8A
Other languages
German (de)
English (en)
Other versions
EP3212346B1 (fr
Inventor
Jürgen Becker
Bernd Kupetz
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP3212346A1 publication Critical patent/EP3212346A1/fr
Application granted granted Critical
Publication of EP3212346B1 publication Critical patent/EP3212346B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/06—Stamping using rigid devices or tools having relatively-movable die parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/208—Deep-drawing by heating the blank or deep-drawing associated with heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling

Definitions

  • the invention relates to a mold for the production of hot-formed components.
  • the structural components of the body are not only significantly involved in the stability of the vehicle, but also play a crucial role in safety in the event of a crash.
  • Hot forming processes are also described in the literature as mold hardening or press hardening.
  • a board is first heated in an oven to a temperature above the austenitizing temperature of the steel and then simultaneously formed in a tool and cooled, ie, form-hardened.
  • a finished molded and trimmed steel component is first produced from a board by cold forming.
  • thermo-mechanically formed following heating to the austenitizing temperature in the tool wherein the thermo-mechanical forming at a temperature above the Austinitmaschinesendtemperatur Ac3 (about 830 ° C) is preferably between 900 and 1100 ° C.
  • the cooling of the formed workpieces by means of a cooling which are located in a closed tool body.
  • the patent DE 19723655 B4 shows a method for producing steel sheet products by heating a measured steel sheet, hot working the steel sheet in a pair of tools, hardening the formed product by rapidly cooling from an austenitic temperature while still being held in the pair of tools and then working the product ,
  • the present invention has the object to provide a mold for the production of components, in particular of vehicle components made of sheet metal, in which particularly good mechanical characteristics are realized and at the same time the weight of the component is reduced.
  • the invention proposes a mold for the production of hot formed components, in particular sheet metal parts before, with a tool lower part and a tool upper part, which are relatively movable to each other and which are formed with corresponding active surfaces for shaping the component, wherein at least the active surface of a tool part is at least partially coolable and are provided in the tool part cooling lines.
  • at least one recess may be provided, which forms in a closed state of the tool with the component an air chamber, which acts as a thermal insulator between the component and the tool part.
  • the object of the invention is based on the effect that a workpiece heated in a furnace to a temperature above AC3 is introduced between the tool parts and hot-formed in the direct process, wherein the workpiece is simultaneously geometrically deformed and thermally cooled.
  • a medium enclosed in the chamber acts as an insulator, thereby cooling the workpiece in the region of the chamber more slowly than in the remaining regions of the component.
  • gases for example inert gases or ambient air, are suitable as the medium.
  • the recess may be formed variable in volume. As a result, the amount of air in the chamber can be increased or reduced as needed, and thus the degree of isolation compared to the cooled tool part can be varied. Here, a higher insulation is achieved, the higher the amount of air in the chamber.
  • an insert may be arranged, which forms a tool-side rear wall of the air chamber.
  • the insert has a surface portion facing the component, which forms part of the wall of the recess.
  • the insert can be arranged movably, in particular linearly displaceable, in the tool part. As a result, depending on the desired degree of isolation, the insert can be transferred into a corresponding position, thereby defining the volume of the air chamber.
  • channels may be provided in the insert for controlling the temperature of the insert.
  • the insert is adjusted to a predetermined temperature with a tempered medium, in particular with a gas or with a liquid, for example oil or water.
  • the medium is tempered in a heating and / or cooling device and passed through the channels of the insert.
  • the insert may be in a retracted position in a closed state of the tool to produce the recess. In this position, a filled with medium / air chamber is then formed. In an open state of the tool, the insert may be in an advanced position in which the volume of the recess is at least reduced in size relative to the volume of the recess in the retracted position of the insert.
  • the air is removed from the chamber, thereby preventing the air in the chamber from excessively heating.
  • the recess or the chamber is consequently flushed regularly with the medium / air. The hot forming process - and not least the structure in this area of the workpiece - is thus not affected.
  • the recess may be actively purged via a controller or controller.
  • the sheet-metal shaped parts may be formed of iron metal, in particular of steel and / or of non-ferrous metal, in particular of aluminum and / or magnesium.
  • the cooling lines may carry a coolant substantially parallel to a surface of the component.
  • the guided in the cooling lines coolant, which may be gaseous or liquid, does not come into direct contact with the component.
  • the thermal energy of the coolant in the cooling lines acts through the material of the tool part on the component or workpiece, which is in contact with the mold during forming with the tool.
  • individual areas of the component or of the workpiece can be cooled at different speeds or different degrees, thereby realizing various mechanical properties in the component.
  • cooling lines can be supplied with coolant via a common feed system. This offers the advantage that a uniform temperature control or supply of coolant of the same temperature is ensured in all cooling lines.
  • the active surface of the upper tool part and / or the active surface of the lower tool part can be designed to be coolable at least in sections. Due to the small thickness of the sheet metal component, which is in the range of 0.5 to 5 mm, a one-sided cooling is sufficient. However, to realize a particularly fast and strong cooling, it may be advantageous to realize a two-sided cooling.
  • Fig. 1 is a sectional view through a mold.
  • Fig. 1 shows a mold 10, which is used in presses for hot forming of tools, in particular sheet metal blanks to sheet metal components 17.
  • the mold 10 has a lower mold half 12u, which rests on a base plate 1 1.
  • the lower mold half 12u cooperates with an upper mold half 12o.
  • the mutually facing active surfaces of the upper mold half 12 o and the lower mold half 12 u are formed correspondingly, so that they act as a die and die of a press tool.
  • the tool half 12o is designed as a punch and the tool half 12u as a die.
  • the upper and lower mold halves can be reversed in their arrangement, such that the upper tool acts as a die and the lower tool acts as a punch.
  • the upper mold half 12o and the lower mold half 12u are relatively movable relative to each other.
  • the mold halves 12o, 12u shown in FIG. 1 can be moved apart and back together. When the mold halves move together, a piece of sheet metal or a sheet metal blank is inserted between the mold halves, and is encompassed and shaped by the active surfaces.
  • the state shown in Fig. 1 corresponds to an end position of the tool halves 12u, 12o in a forming process in which the component 17 is finished reshaped.
  • an insert 16 is shown, which is movable along the double arrow B relative to the tool half 12o.
  • the insert 16 is thus linearly displaceable in the direction of the component 17 and away from the component 17.
  • the insert 16 performs a linear motion substantially perpendicular to the component surface. Alternatively, however, a movement obliquely to Component surface to be performed.
  • the insert 16 forms a recess 15.
  • the recess 15 acts as a chamber which is filled with air. This chamber 15 is bounded by a surface of the insert 16, which faces the component 17, an inner surface of the opening through the upper tool half 12o in which the insert 16 is introduced and a portion of the surface of the component 17.
  • the air gap 15 slower, so that sets in this area a microstructure with low mechanical characteristics, in particular with low strength values.
  • the air gap 15 thus covers exactly the area which is characterized in the later component or vehicle by low strength and thus high ductility. The properties of the component can thus be adjusted so that in the event of a vehicle crash results in a targeted deformation of the ductile region.
  • the size of the air chamber 15 can be changed by shifting the insert 16. Depending on the selected position of the insert 16 i. Depending on the size of the air chamber 16, other desired strength values in the area of the component can be adjusted accordingly.
  • the air chamber 16 may be formed in particular with a small volume as a gap.
  • channels 18 may be arranged, which serve to control the temperature of the insert.
  • the insert 16 is flushed with a tempered medium and adjusted to a predetermined temperature.
  • the medium is pre-tempered in a heating and / or cooling device and passed through the channels 16 of the insert 18.
  • the temperature of the insert 16 and thus the air in the chamber 15 can be controlled or regulated via the temperature of the medium.
  • Gases, for example inert gases or liquids, for example oil or water, are particularly suitable as the medium.
  • the provision of channels 18 is only optional. In other embodiments of the invention, the insert 16 may be formed without the medium-carrying channels 18.
  • a mold insert 13 is provided, in which a cooling system having a plurality of cooling pipes 14 is integrated.
  • the use of such cooling inserts 13 offers, on the one hand, the advantage that different component contours can be embossed with a lower forming tool 12u in that the mold insert 13 can be replaced in accordance with the desired component shape.
  • the cooling lines 14 are fluidly connected to a distribution or connection system. The coolant is thus introduced via the connection system, and distributed to the cooling lines 14.
  • the cooling lines 14 shown in FIG. 1 extend substantially parallel to the surface of the component 17 and thus also substantially parallel to the active surface of the mold halves 12 u, 12 o.
  • the cooling lines 14 thus follow the component contour at a certain distance in the mold insert 13 of the lower mold half 12u.
  • Suitable coolants for the cooling lines 14 are gaseous cooling media, liquid cooling media or a combination thereof.
  • a single insert 16 is shown, which is arranged in the upper tool part 12o.
  • the use in the lower tool part 12u be arranged.
  • one or more inserts 13 may be positioned in both the upper and lower mold halves 12o, 12u.
  • only the lower mold half 12u is provided with cooling pipes 14.
  • the arrangement of the cooling system, ie the connection system and the cooling lines 14 may also be arranged in the upper mold half 12o.
  • a mold insert 13 may alternatively be arranged in the upper mold half 12o or in both mold halves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne un outil de formage (10) pour la réalisation de pièces (17) formées à chaud, en particulier de pièces formées en tôle, présentant une partie inférieure d'outil (12u) et une partie supérieure d'outil (12o), qui peuvent être déplacées l'une par rapport à l'autre et qui sont réalisées avec des surfaces actives correspondantes pour le formage de la pièce (17). La surface active d'une des parties d'outil (12u, 12o), au moins, est conçue de manière à pouvoir être refroidie au moins par sections et des conduites de refroidissement (14) sont prévues dans la partie d'outil (12u, 12o). Selon l'invention, au moins un évidement (15) est prévu dans au moins une des deux parties d'outils (12u, 12o), qui forme une chambre à air avec la pièce (17) lorsque l'outil (10) est fermé, ladite chambre à air fonctionnant comme isolant thermique entre la pièce (17) et la partie d'outil (12o).
EP15787146.8A 2014-10-29 2015-10-08 Outil de formage servant à produire des pièces formées à chaud Active EP3212346B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014221997.3A DE102014221997A1 (de) 2014-10-29 2014-10-29 Formwerkzeug zur Herstellung von warmumgeformten Bauteilen
PCT/EP2015/073207 WO2016066391A1 (fr) 2014-10-29 2015-10-08 Outil de formage servant à produire des pièces formées à chaud

Publications (2)

Publication Number Publication Date
EP3212346A1 true EP3212346A1 (fr) 2017-09-06
EP3212346B1 EP3212346B1 (fr) 2020-05-13

Family

ID=54361051

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15787146.8A Active EP3212346B1 (fr) 2014-10-29 2015-10-08 Outil de formage servant à produire des pièces formées à chaud

Country Status (4)

Country Link
US (1) US10537928B2 (fr)
EP (1) EP3212346B1 (fr)
DE (1) DE102014221997A1 (fr)
WO (1) WO2016066391A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014118416B4 (de) * 2014-12-11 2017-02-23 Thyssenkrupp Ag Werkzeug zum Umformen und/oder partiellen Presshärten eines Werkstücks
EP4032631A1 (fr) * 2021-01-26 2022-07-27 C.R.F. Società Consortile per Azioni Appareil et procédé d'estampage à chaud de feuilles métalliques avec modulation de la vitesse de trempe

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9602257L (sv) 1996-06-07 1997-12-08 Plannja Hardtech Ab Sätt att framställa ståldetalj
DE102005025026B3 (de) 2005-05-30 2006-10-19 Thyssenkrupp Steel Ag Verfahren zum Herstellen eines Metallbauteils mit aneinander angrenzenden Abschnitten unterschiedlicher Materialeigenschaften
JP4664781B2 (ja) * 2005-09-12 2011-04-06 新日本製鐵株式会社 熱間プレス成形用金型および熱間プレス成形装置並びに熱間プレス成形方法
CN100464890C (zh) 2005-12-19 2009-03-04 河南科技大学 一种镁合金管件的成形方法及装置
CN101288889B (zh) 2007-04-18 2012-07-11 上海大众汽车有限公司 超高强度钢板热冲压成型模具
WO2009123538A1 (fr) * 2008-04-03 2009-10-08 Gestam Hardtech Ab Procédé de fabrication d'un produit métallique en feuillets formé sous presse
CN201231286Y (zh) 2008-07-31 2009-05-06 钢铁研究总院 汽车车身零件用热冲压成型模具
DE102009020423A1 (de) * 2009-05-08 2010-11-11 Bayerische Motoren Werke Aktiengesellschaft Teileverbund mit einem pressgehärteten Blechbauteil
JP5740099B2 (ja) * 2010-04-23 2015-06-24 東プレ株式会社 熱間プレス製品の製造方法
US8194036B1 (en) * 2011-06-29 2012-06-05 Google Inc. Systems and methods for controlling a cursor on a display using a trackpad input device
JP5611257B2 (ja) * 2012-03-13 2014-10-22 パナソニック株式会社 金属ラミネートフィルム成形方法およびその成形装置
KR20130108899A (ko) 2012-03-26 2013-10-07 현대자동차주식회사 핫 스탬핑 장치
DE102012106405B4 (de) * 2012-07-17 2016-06-16 Kirchhoff Automotive Deutschland Gmbh Verfahren zum Herstellen eines umgeformten und zumindest bereichsweise gehärteten Metallblechbauteils sowie Verwendung eines Presshärtwerkzeuges zum Herstellen eines solchen Bauteiles
US20150246383A1 (en) * 2014-02-28 2015-09-03 Ford Motor Company System and process for producing a metallic article
DE102014108901B3 (de) * 2014-06-25 2015-10-01 Thyssenkrupp Ag Verfahren und Umformwerkzeug zum Warmumformen sowie entsprechendes Werkstück

Also Published As

Publication number Publication date
US10537928B2 (en) 2020-01-21
US20170225214A1 (en) 2017-08-10
CN106660097A (zh) 2017-05-10
EP3212346B1 (fr) 2020-05-13
DE102014221997A1 (de) 2016-05-04
WO2016066391A1 (fr) 2016-05-06

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