EP1734135A2 - Presse et procédé pour la déformation à chaud et la trempe de pièces en acier - Google Patents

Presse et procédé pour la déformation à chaud et la trempe de pièces en acier Download PDF

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Publication number
EP1734135A2
EP1734135A2 EP06011169A EP06011169A EP1734135A2 EP 1734135 A2 EP1734135 A2 EP 1734135A2 EP 06011169 A EP06011169 A EP 06011169A EP 06011169 A EP06011169 A EP 06011169A EP 1734135 A2 EP1734135 A2 EP 1734135A2
Authority
EP
European Patent Office
Prior art keywords
press
workpiece
tool
hardening
liquid
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Withdrawn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
EP06011169A
Other languages
German (de)
English (en)
Other versions
EP1734135A3 (fr
Inventor
Hans-Jürgen Knaup
Christian Dr. Hielscher
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.)
Benteler Automobiltechnik GmbH
Original Assignee
Benteler Automobiltechnik GmbH
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 Benteler Automobiltechnik GmbH filed Critical Benteler Automobiltechnik GmbH
Publication of EP1734135A2 publication Critical patent/EP1734135A2/fr
Publication of EP1734135A3 publication Critical patent/EP1734135A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/60—Aqueous agents
    • 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
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • 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
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • 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
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys

Definitions

  • the invention relates to a method for forming and hardening a workpiece heated above AC 3 from steel in a press with an upper and a lower tool with a molding geometry and a corresponding press.
  • From the DE 24 52 486 C2 is a method for compression molding and curing of a steel sheet with a low material thickness and good dimensional stability, in which the steel sheet is heated to a temperature above AC 3, is then pressed in less than 5 seconds into the final shape between two indirectly-cooled molds with substantial change in shape and, while remaining in the press, subjected to a rapid cooling so as to obtain a martensitic and / or bainitic fine-grained texture.
  • a hot-formed part produced in this way is used in vehicle construction, for example for structural and safety parts such as bumpers and B-pillars.
  • cooling channels are located at a distance of approx. 5 mm below the tool surface along the inside of the tool with the specified component contour. Through these cooling channels flows a cooling medium, often water, that dissipates the heat emitted from the hot component to the tool heat to the outside.
  • the cooling channels are drilled in the tool. The introduction of the holes can be done only in sections, especially in a non-linear shape, since the holes can always be performed only linear.
  • the tool In a curved and / or complicated component shape, the tool is therefore divided into many individual segments in which a cooling channel is introduced in sections, which in turn must then be connected to the other sections through a further bore or out to the outside. Consequently, the production of indirectly cooled tools elaborate and expensive. In addition, in the tool during operation repeatedly caused by stress cracks leaks occur in which coolant escapes from the cooling channels and evaporates. The tools must therefore be repaired continuously, which leads again and again to downtime in production.
  • a method for hardening of flat metal components comprising the following steps: heating at least one metal component, conveying the components along a conveying path, conveying the components between a lower and an upper pressing device, approach of the pressing devices to each other until parts of the pressing means touch during at the same time the components are in the pressing device, cooling the components in a cooling liquid, dispensing and further conveying the components out of the pressing device, wherein one of the pressing means moves vertically through the conveying path when the components are respectively retained or dispensed.
  • both the conveying path between the pressing devices and the pressing device and the objects themselves are lowered into the cooling liquid, while the pressing devices hold the components.
  • the EP 1 191 111 A1 deals only with the mass hardening of flat metal components, which undergo no change in shape, but only clamped so as not to distort during curing. A shaping by the pressing device of EP 1 191 111 A1 is not scheduled.
  • the object of the invention is therefore to simplify the production of a thermoformed and cured in a tool component and to increase the process speed.
  • the workpiece to be cured had to remain in the closed press for a certain holding time until the desired martensite structure and the required component strength had been established.
  • the inventive method reduces the necessary hold times so much that a production of suitable for this process components in the permanent stroke under mechanical presses is possible.
  • the gradient of the cooling ie the cooling rate of the workpiece, can be adjusted via the properties of the liquid, the deformation rate and in particular also via the height of the liquid level. If the workpiece moves back a shorter distance through the liquid or if it passes through the liquid faster, higher degrees of deformation can be achieved.
  • Which workpieces can be deep-drawn and hardened with the method according to the invention depends both on the geometry of the workpiece and on the material. If the material hardens too quickly and / or the deformation is too complex, the workpiece may tear during the deep-drawing process.
  • a cooling liquid is for example water.
  • the forming process can be improved by the addition of a lubricant into the liquid bath.
  • a lubricant additive for example, graphite or a graphite-free, water-miscible die lubricant can be used, which is currently used for forgings.
  • the lubricant supports the forming of the workpiece and reduces tool wear.
  • the lower tool of the press is only partially submerged in the liquid bath. Parts of the mold geometry are above the liquid level. Under certain circumstances, the workpiece to be formed can be placed directly on the protruding from the liquid parts of the mold geometry. During the deep-drawing process, liquid fractions located within the mold geometry are displaced, so that the workpiece almost completely comes into contact with the liquid as a result of the displacement process.
  • the inventive method is particularly suitable for deep drawing and curing of a material, which is composed in terms of weight percent composed Carbon (C) 0.18% to 0.3% Silicon (Si) 0.1% to 0.7% Manganese (Mn) 1.0% to 2.5% Phosphorus (P) maximum 0.025% Chrome (Cr) up to 0.8% Molybdenum (Mo) up to 0.5% Sulfur (S) maximum 0.01% Titanium (Ti) 0.02% to 0.05% Boron (B) 0.0015% to 0.005% Aluminum (Al) 0.01% to 0.06%
  • Remaining iron including impurities caused by melting.
  • This material can be hardened well in a liquid and, after hot working and hardening, has a yield strength R P0.2 ⁇ 950 MPa, a tensile strength R m ⁇ 1350 MPa and an elongation A5> 6%. In particular, it cures slowly enough in a liquid to deep draw it during the hardening process.
  • a press according to the invention for performing the method is characterized in that the lower tool of the press is located in a liquid bath, wherein the shape geometry is at least partially below a liquid level.
  • the upper tool can be moved both above and below the liquid, so that a workpiece in the open state of the press can be inserted above the liquid level.
  • At least the lower tool need not have any internal cooling channels, clearances or the like. Depending on the press configuration, this also applies to the upper tool.
  • the tools are at least partially maintenance-free. The tools can also be easier and cheaper to produce, because a complex technique is eliminated. In the absence of clearances, there is no weakening of the tool.
  • the press is provided with known elements such as hold-downs, leading swords, stops, ejectors and so on as needed. Loading and unloading the press with workpieces is therefore easy. The cycle speed with which hardened, dimensionally true workpieces can be produced is relatively high.
  • FIG. 1 the press itself is not shown in detail.
  • Two die halves or tools 1, 2 with a shape geometry 3, 4 are shown.
  • the lower die half 2 is installed in a container 6 filled with a suitable cooling and / or lubricating liquid 5 such that the lower die geometry 4 is completely below the liquid level 50 lies.
  • An austenitized workpiece 7, in this case a circuit board 7, lies above the liquid level 50 on special supports 8, which are mounted on resilient elements 9, in this case springs 9.
  • the board 7 is detected by the shape geometry 3 and immersed in the liquid 5.
  • the pads 8 are pressed in the direction of the lower die half 2 on the springs 9 until both tool halves 1, 2 have closed and the workpiece 7 is formed and cured.
  • the workpiece 7 can be removed true to the press.
  • the press can work in the continuous stroke. This speeds up the entire process and, if desired, allows the use of mechanical presses.
  • the lower tool 2 is only partially in the liquid bath 5. Parts 41 are below the liquid level 50 and other parts 40 are above of the liquid level 50.
  • the circuit board 7 rests directly on the lower tool 2, the circuit board 7 still having no contact with the liquid 5.
  • the board 7 is deep-drawn into the recesses 80 and 81. In this case, the liquid 5 located in the recesses 80 and 81 is displaced, so that the board 7 also comes into contact with the liquid 5 at the contact surfaces 40.
  • this special press arrangement other degrees of hardness and / or deformation can be set than with the press arrangement according to FIG. 1. The arrangement itself depends on the workpiece geometry to be achieved and the hardness values to be set.
  • the press of Figure 2 is additionally equipped with displacement elements 90, 91.
  • the displacement elements 90, 91 are mounted outside of the actual mold 1.
  • the displacement elements 90, 91 laterally dip into the liquid bath 5 laterally of the workpiece 7 to be shaped.
  • the liquid 5 is displaced by the penetration of the displacement elements 90 and 91 in the direction of the upper tool 1.
  • the liquid level 50 rises.
  • the liquid 5 flooded when moving the tools 1 and 2, the lower tool 2 and the workpiece 7.
  • the liquid level 50 can be additionally regulated so that the workpiece 7 in sufficient contact with the Liquid 5 comes to achieve the desired hardness values and degrees of deformation.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Heat Treatment Of Articles (AREA)
  • Press Drives And Press Lines (AREA)
EP06011169A 2005-06-16 2006-06-08 Presse et procédé pour la déformation à chaud et la trempe de pièces en acier Withdrawn EP1734135A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005028010A DE102005028010B3 (de) 2005-06-16 2005-06-16 Verfahren und Presse zum Warmformen

Publications (2)

Publication Number Publication Date
EP1734135A2 true EP1734135A2 (fr) 2006-12-20
EP1734135A3 EP1734135A3 (fr) 2008-11-19

Family

ID=36643300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06011169A Withdrawn EP1734135A3 (fr) 2005-06-16 2006-06-08 Presse et procédé pour la déformation à chaud et la trempe de pièces en acier

Country Status (4)

Country Link
US (1) US7533553B2 (fr)
EP (1) EP1734135A3 (fr)
JP (1) JP2006346751A (fr)
DE (1) DE102005028010B3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007003745A1 (de) * 2007-01-19 2008-07-24 Müller Weingarten AG Vorrichtung zur Herstellung pressgehärteter Blechbauteile
EP2583766A1 (fr) 2011-10-21 2013-04-24 EDAG GmbH & Co. KGaA Formage avec refroidissement
CN109807383A (zh) * 2018-12-31 2019-05-28 合肥久享机械有限责任公司 一种钣金件自动化落料系统

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007009937A1 (de) * 2007-03-01 2008-09-04 Schuler Smg Gmbh & Co. Kg Verfahren zur Umformung einer Platine und Kühlvorrichtung für eine Platine
DE102007019173B3 (de) * 2007-04-20 2008-05-29 Benteler Automobiltechnik Gmbh Verfahren zum Pressformen und Härten eines Werkstücks aus Stahl in einer Gesenkpresse
DE102007056186B3 (de) 2007-11-21 2009-01-08 Aisin Takaoka Co., Ltd., Toyota Warmformpresse
US20090242086A1 (en) 2008-03-31 2009-10-01 Honda Motor Co., Ltd. Microstructural optimization of automotive structures
DE102009017326A1 (de) * 2009-04-16 2010-10-21 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung von pressgehärteten Bauteilen
KR101257160B1 (ko) 2010-01-27 2013-04-22 현대제철 주식회사 침수 냉각 방식을 사용하는 금형 장치
US8671729B2 (en) * 2010-03-02 2014-03-18 GM Global Technology Operations LLC Fluid-assisted non-isothermal stamping of a sheet blank
DE102010012579B3 (de) * 2010-03-23 2011-07-07 Benteler Automobiltechnik GmbH, 33102 Verfahren und Vorrichtung zur Herstellung von gehärteten Formbauteilen
DE102010035339B4 (de) 2010-08-24 2012-05-24 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung von Formbauteilen aus einer Platine aus gehärtetem warm umformbaren Stahlblech
DE102011051965A1 (de) 2011-07-20 2013-01-24 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines rohrförmigen Strukturbauteils für ein Kraftfahrzeug und Strukturbauteil
DE102011116885B4 (de) * 2011-10-25 2018-12-06 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Warmumformen und insbesondere zum Presshärten eines mit einer metallischen Korrosionsschutzbeschichtung beschichteten Stahlblechmaterials unter Verwendung eines Schmiermittels
JP6001883B2 (ja) * 2012-03-09 2016-10-05 株式会社神戸製鋼所 プレス成形品の製造方法およびプレス成形品
CN102794344B (zh) * 2012-08-13 2015-02-04 嘉兴学院 喷淋式热冲压成形机及喷淋式复合热冲压成形淬火工艺
JP6075304B2 (ja) * 2013-03-28 2017-02-08 株式会社豊田中央研究所 熱間プレス成形方法および熱間プレス成形装置
DE102013008609A1 (de) * 2013-05-22 2014-11-27 Schuler Pressen Gmbh Verfahren zur Umformung einer metallenen Platine und Umformvorrichtung zur Durchführung des Verfahrens
CN103736867B (zh) * 2013-12-20 2016-04-27 江苏大学 一种超高强度钢板热成形板料支撑机构
CN104001811B (zh) * 2014-06-13 2016-01-20 沈阳飞机工业（集团）有限公司 一种tc4钛合金角形薄壁零件用热成型模具及成型方法
DE102014112244A1 (de) 2014-08-26 2016-03-03 Benteler Automobiltechnik Gmbh Verfahren und Presse zur Herstellung wenigstens abschnittsweise gehärteter Blechbauteile
CN105328047A (zh) * 2015-11-05 2016-02-17 福州大学 一种具有新型冷却系统的超高强度钢板热冲压装置及其方法
CN107096844B (zh) * 2017-06-27 2018-07-10 重庆理工大学 热冲压板料定位单元
CN109092957B (zh) * 2018-06-29 2020-05-15 昆明理工大学 一种轴套零件局部触变挤压方法
CN109207700B (zh) * 2018-10-31 2020-11-24 中国航发航空科技股份有限公司 一种用于发动机热处理的工装
CN111113977A (zh) * 2019-12-30 2020-05-08 盐城意权汽配制造有限公司 一种刹车片冲压模具
CN111496050B (zh) * 2020-04-09 2022-03-25 武汉理工大学 铝合金板材冷热复合冲压成形装置及其冲压方法
CN114101418B (zh) * 2020-09-01 2022-08-26 宁波祥路中天新材料科技股份有限公司 一种应用于热成型的热辊弯成型机
CN112207169A (zh) * 2020-09-15 2021-01-12 比克希汽车科技（合肥）有限公司 一种高速冲压机
CN113751410B (zh) * 2021-09-14 2022-07-22 山东钢铁集团日照有限公司 一种高耐蚀易焊接热压零部件的热浴成形工艺
CN115255157B (zh) * 2022-07-21 2024-04-12 江西追风压缩机有限公司 一种压缩机壳体加工模具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1457772A (en) * 1920-01-12 1923-06-05 George H Forsyth Forming and tempering disk wheels
DE2452486A1 (de) * 1973-11-06 1975-05-07 Norrbottens Jaernverk Ab Verfahren zur herstellung eines werkstueckes aus gehaertetem stahl
JPS55131122A (en) * 1979-03-31 1980-10-11 Kawasaki Yukou Kk Press device serving also as heat treatment device
US6048418A (en) * 1998-06-16 2000-04-11 Sterling Detroit Company Ring forming apparatus and heat treating process

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US2821016A (en) * 1955-03-03 1958-01-28 William M Dickson Method of hot forging or extruding metal shapes and lubricant for use in hot forging and extruding operations
DE2603618A1 (de) * 1975-06-05 1976-12-23 Kenebuc Galt Ltd Verfahren und vorrichtung zur waermebehandlung von stahl
JP3562353B2 (ja) * 1998-12-09 2004-09-08 住友金属工業株式会社 耐硫化物応力腐食割れ性に優れる油井用鋼およびその製造方法
SE517224C2 (sv) * 2000-09-18 2002-05-14 J Son Haerdteknik Ab Sätt och anordning för presshärdning

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1457772A (en) * 1920-01-12 1923-06-05 George H Forsyth Forming and tempering disk wheels
DE2452486A1 (de) * 1973-11-06 1975-05-07 Norrbottens Jaernverk Ab Verfahren zur herstellung eines werkstueckes aus gehaertetem stahl
JPS55131122A (en) * 1979-03-31 1980-10-11 Kawasaki Yukou Kk Press device serving also as heat treatment device
US6048418A (en) * 1998-06-16 2000-04-11 Sterling Detroit Company Ring forming apparatus and heat treating process

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007003745A1 (de) * 2007-01-19 2008-07-24 Müller Weingarten AG Vorrichtung zur Herstellung pressgehärteter Blechbauteile
DE102007003745B4 (de) * 2007-01-19 2017-04-06 Müller Weingarten AG Vorrichtung zur Herstellung pressgehärteter Blechbauteile
EP2583766A1 (fr) 2011-10-21 2013-04-24 EDAG GmbH & Co. KGaA Formage avec refroidissement
CN109807383A (zh) * 2018-12-31 2019-05-28 合肥久享机械有限责任公司 一种钣金件自动化落料系统

Also Published As

Publication number Publication date
DE102005028010B3 (de) 2006-07-20
EP1734135A3 (fr) 2008-11-19
JP2006346751A (ja) 2006-12-28
US7533553B2 (en) 2009-05-19
US20060283530A1 (en) 2006-12-21

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