EP3720624A1 - Presse et procédé de formage à chaud et de trempe de flans de tôle - Google Patents

Presse et procédé de formage à chaud et de trempe de flans de tôle

Info

Publication number
EP3720624A1
EP3720624A1 EP18807863.8A EP18807863A EP3720624A1 EP 3720624 A1 EP3720624 A1 EP 3720624A1 EP 18807863 A EP18807863 A EP 18807863A EP 3720624 A1 EP3720624 A1 EP 3720624A1
Authority
EP
European Patent Office
Prior art keywords
press
tool
sheet metal
tools
hot forming
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
EP18807863.8A
Other languages
German (de)
English (en)
Other versions
EP3720624B1 (fr
Inventor
Stephan Gante
Björn Müller
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.)
GEDIA Gebrueder Dingerkus GmbH
Original Assignee
GEDIA Gebrueder Dingerkus 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 GEDIA Gebrueder Dingerkus GmbH filed Critical GEDIA Gebrueder Dingerkus GmbH
Publication of EP3720624A1 publication Critical patent/EP3720624A1/fr
Application granted granted Critical
Publication of EP3720624B1 publication Critical patent/EP3720624B1/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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/08—Dies with different parts for several steps in a process
    • 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
    • C21D2261/00—Machining or cutting being involved

Definitions

  • the invention relates to a press for hot working and hardening of steel sheet metal blanks, having an upper part, which has an upper tool part and a lower part, which has a tool lower part, which are movable toward and away from each other in a Pressenhubraum, wherein between pressure surfaces of the tool parts at each Press stroke in the closed position of the tool to one
  • processing sheet metal plate is arranged, wherein the sheet metal plate rests on the lower tool part or the pressure surface and is contacted in the closed position of the tool by the upper tool or its pressure surface, wherein the press extending transversely to the Pressenhubides
  • Transport direction are transported in the sheet metal blanks through the press, and a
  • presses and methods for hot working and hardening are widely known, wherein a sheet metal blank is heated to austenitizing temperature in a furnace prior to forming, and then fed to the press and formed therein.
  • the press has a tool with a
  • Tool upper part and a lower tool part wherein the upper tool part on the upper part of the press, such as a plunger plate, and the
  • Lower tool part at the lower part of the press for example, a table top, is arranged.
  • Tool lower part deformed and hardened.
  • the press and thus the tools are held in a closed position for a few seconds, so that the
  • Sheet metal is cooled during the deformation in the press and hardened.
  • the desired shape of the sheet metal blank must be achieved within a press stroke, with the disadvantage that only a limited deformation of the sheet metal blank is possible without the board takes damage from the deformation. Parts with particularly complex geometries, where a large deformation occurs, thus can not
  • the object of the invention is to provide a press and a method for hot forming and hardening of sheet metal blanks with which or in the parts of sheet metal blanks with particularly complex geometries are inexpensive to produce.
  • the invention proposes a press according to claim 1.
  • the metal sheets are previously on
  • Each sheet metal blank is then progressively deformed in at least two hot forming tools.
  • Each hot forming tools can be arranged in the press three, four or more hot forming tools in which the metal sheets are deformed gradually, so that a
  • a sheet metal plate is arranged on each lower tool part or its pressure surface, the tool tops are pressed with their pressure surfaces when closing the press in Pressenhubides on the lower tool part and a sheet metal plate between a tool shell and a tool lower part is processed by the pressure surfaces.
  • each hot forming tool and in the press hardening tool a sheet metal blank is thus machined on each press stroke, so that at least three sheet metal blanks are machined simultaneously during a press stroke. After machining in the last tool, the hardened part is removed from the press.
  • the tools are arranged close to each other in the press.
  • Sheet metal plate to the next tool allows and the temperature loss of the sheet metal blank by the
  • the sheet metal blanks still have a temperature sufficient for press hardening on reaching the last tool.
  • at least the tool upper part of the last tool is held with a spring on the upper part and whose pressure surface protrudes with respect to the pressure surfaces of the hot forming tools at least partially open press, and the pressure surfaces of the tool parts are at least approximately aligned with each other, wherein the closed position of the last Tool achieved before reaching the closed position of the hot forming tools and yielding the spring
  • Hot forming tools are open when leaving the closed position of the press, the last tool only when reaching a specified
  • Opening position of the press the opening position of the other tools trailing, open.
  • Stroke movements of the press must be continuous and must not be interrupted. A hold of a few seconds in the closed position, however, in particular for the press hardening of Sheet metal in the last tool desirable because the sheet metal otherwise would not optimal
  • Pressure surface when closing the press touches the sheet metal blank associated with this tool before the tool tops of the hot forming tools or their pressure surfaces touch the metal sheets.
  • the closing position of the last tool is achieved before the press is completely closed and before the hot forming tools
  • the last tool shell is held resiliently with a spring on the upper part of the press and by the contact with the sheet metal blank when closing the
  • the hot forming tools are open at the same time, while the last tool still remains in the closed position and its pressure surfaces until reaching a
  • the contact between the sheet metal blank and the pressure surfaces of the last tool is extended and the sheet metal plate hardens optimally, while the hot forming tools are in contact with the sheet metal blanks only for a short closing moment.
  • the press can perform continuous strokes, without interruption, with the last
  • Sheet metal plate is held in the last tool for a few seconds and is optimally cured therein.
  • the opening position of the press and the opening of the last tool are fixed by the spring travel of the spring.
  • the holding time in the last tool can be longer or shorter.
  • Hot forming tools have a heating system.
  • the temperature of the sheet metal blanks in the hot forming tools is maintained at a particularly advantageous for the subsequent hardening in the last tool temperature.
  • the tool for hardening the sheet metal blanks has a cooling.
  • Hardening tool quickly cooled or quenched so that the desired structure is formed in the sheet metal blank.
  • the spring is a mechanical spring, a gas spring or a
  • the spring is adjusted or designed so that the tool upper part acts on the first contact with the sheet metal blank with a desired force, for example, with the nominal pressing force of the press on the sheet metal blank and is evenly adjustable in the direction of the upper part of the press until the press is fully closed.
  • the spring is a hydraulic spring which is connected to the hydraulic circuit of the press and via this
  • the spring is repeatable adjustable to the press stroke of the press.
  • Hot forming tools have a cutting, punching or the like separating or processing device.
  • the sheet metal blanks are thus pruned or punched or processed in a different manner in the warm state and at the same time as hot forging.
  • Deformation degree three, four or more hot forming tools can be provided in the press, in which the sheet metal blanks are deformed gradually. Subsequently, the sheet metal blanks are hardened in the last tool.
  • the sheet metal blanks are transported intermittently through the press, each sheet metal plate with the press open in the transport direction to a
  • Tool is transported and remains in this during the closing of the press and the tools arranged therein for the duration of processing until the press opens again and the sheet metal blank is transported to the next tool.
  • Transport direction first arranged tools hot-formed and hardened in the last tool. After machining in the last tool, the finished part is removed from the press.
  • the processing of the metal blanks in the tools takes place simultaneously with each press stroke, so that at least three metal blanks during a
  • Press stroke is moved resiliently until the last tool and the hot forming tools
  • Press force can be held as the press would then be damaged.
  • the strokes of the press must continue to run continuously.
  • the last tool shell or its pressure surface contacts the sheet metal blank when closing the Press resilient before the other tool shells or their pressure surfaces the sheet metal blanks
  • Sheet metal blanks are ready for further transport in the next tool, the last tool or its pressure surfaces the last sheet metal plate still resiliently contacted until it reaches a fixed opening position of the press. Only at
  • Hot forming tools to process the sheet metal blanks only for a short closing moment. Also with
  • the sheet metal plates maintain a preferred temperature for curing until reaching the last processing station.
  • Hot forming tools at least one more
  • Processing is carried out, preferably the sheet metal blank is trimmed and / or perforated.
  • the boards can be cut or punched while warm. This eliminates costly rework on the sheet metal blanks.
  • the sheet metal blank is made of 20MnB8.
  • the material 20MnB8 is particularly suitable because this still after three hot forming stages still suitable for curing temperature, preferably preferably about 450 ° C, and still optimally cured at this temperature in the last processing station and forms the desired microstructure.
  • Fig. 1 shows a press according to the invention
  • Sheet metal blanks 2 made of steel, with an upper part 3, which has a plurality of upper tool parts 4, 4a, 4b, 4c and a lower part 5, which several
  • Tool lower parts 6, 6a, 6b, 6c which are movable toward each other and away from each other in a Pressenhubraum 7.
  • each press stroke is in the closed position of the press 1 and thus the tools each a sheet metal blank 2 between each two pressure surfaces 8, 8 '; 8a, 8a '; 8b, 8b '; 8c, 8c 'the
  • Tool parts 4, 6; 4a, 6a; 4b, 6b; 4c, 6c processed, with the sheet metal blanks 2 on the tool bases
  • the press 1 has a transverse to the Pressenhubides 7 extending transport direction 9, in which the sheet metal blanks 2 are transported by the press 1 intermittently.
  • Sheet metal blanks 2 are then fed to the press 1 at a temperature of about 850 ° C and transported intermittently through the press 1 in a transport direction 9.
  • the press 1 In the press 1 are the
  • Sheet metal blanks 2 processed in a plurality in the transport direction 9 consecutive tools the sheet metal blanks 2 are transported to the tools with the press 1 open and the
  • Fig. 1 shows the press 1 in the open state, with the sheet metal blanks 2 already to the tools
  • the three first arranged in the transport direction 6 tools are as hot forming tools for
  • Hot forming tools increasingly deformed. There may also be four or more hot forming tools in the press
  • the sheet metal blanks 2 may be deformed stepwise, for example, to allow greater deformation of the sheet metal blanks 2, without this suffers damage in the production of particularly complex geometries.
  • each sheet metal plate 2 is fed to the last in the transport direction 9 tool, which is provided for curing the metal sheets 2. After curing, the finished part is removed from the press 1.
  • a sheet metal blank 2 is placed on each lower tool part 6, 6a, 6b, 6c or its pressure surface 8 ', 8a', 8b ', 8c', wherein the
  • Tool tops 4, 4a, 4b, 4c with their pressure surfaces 8, 8a, 8b, 8c when closing the press 1 in
  • Tool lower part 6, 6a, 6b, 6c are pressed.
  • press 1 When the press 1 is closed in each case a sheet metal blank
  • a sheet-metal blank 2 is therefore produced with each press stroke processed so that four metal blanks 2 are processed simultaneously.
  • the tools are arranged close to each other in the press 1, wherein the sheet metal blanks 2 between the tools only have to cover small transport routes.
  • a quick transport of each sheet metal plate 2 to the next tool allows and a loss of temperature of the sheet metal plate 2 during transport only small, so that the sheet metal blanks 2 on reaching the last tool still another for
  • Tool upper part 4 c of the last tool is resiliently held on the upper part 3 and the pressure surface 8 c relative to the pressure surfaces 8, 8 a, 8 b of the
  • Hot forming tools at least partially
  • open press 1 protrudes, and the pressure surfaces 8 ', 8a', 8b ', 8c' of the tool lower parts 6, 6a, 6b, 6c are arranged at least approximately aligned with each other.
  • the press 1 is at least partially opened.
  • Fig. 2 shows that the closed position of the last tool is reached before reaching the closed position of the hot forming tools.
  • the upper tool part 4c of the last tool with the sheet metal blank before reaching the Closing position of the press 1 resiliently in contact, while the further tool tops 4, 4a, 4b, the sheet metal blanks 2 do not touch.
  • Tool upper parts 4, 4a, 4b, 4c with the sheet metal blanks 2 in contact and the pressure surfaces 8, 8a, 8b, 8c and
  • the last tool is opened only when reaching a fixed opening position of the press 1 and the last tool upper part 4 c the
  • Sheet metal blanks 2 are only in contact for a short closing moment.
  • the last tool upper part 4 c is held by a spring 15, preferably a mechanical spring 15, a gas spring or a hydraulic spring 15 on the upper tool part 3.
  • the spring 15 is set or designed so that the upper die 4c with a desired force, for example, with the nominal pressing force of the press 1, acts on the sheet metal blank 2, as soon as and as long as this Sheet metal 2 contacted. Until the press 1 is completely closed, the upper tool part 4c is pressed uniformly in the direction of the upper part 3. If a hydraulic spring 15 is used, it is particularly advantageous to the
  • Hydraulic circuit of the press 1 to connect and adjust over this, since the spring 15 then repeat accurate to the press stroke of the press. 1
  • the opening position of the press 1, in which the last tool opens, is determined by the spring travel of the spring 10. Only after crossing this
  • the upper tool parts 4, 4a, 4b and / or the lower tool parts 6, 6a, 6b of the hot forming tools are heated.
  • Tool lower part 6 c of the last tool have a cooling, so that the sheet metal blank 2 cooled or quenched in the last tool quickly and the desired structure in the sheet metal blank 2 can be adjusted.
  • the hot forming tools can additionally
  • Sheet metal blanks 2 in the hot state can be trimmed or punched simultaneously with the hot for example. This eliminates one
  • the material 20MnB8 is suitable because this even after three hot forming stages still has a temperature of 450 ° C and at this temperature in the last processing station 10 still hardens optimally.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

L'invention concerne un procédé et une presse (1) de formage à chaud et de trempe de flans de tôle (2) d'acier, la presse (1) présentant plusieurs outils se suivant dans un sens de transport (9) des flans de tôle (2) pour l'usinage simultané de plusieurs flans de tôle (2) lors de chaque course de la presse, les outils présentant chacun une partie supérieure d'outil (4, 4a, 4b, 4c) maintenue au niveau de la partie supérieure (3) de la presse (1) et une partie inférieure d'outil (6, 6a, 6b, 6c) maintenue au niveau de la partie inférieure (5) de la presse (1), au moins deux outils étant agencés en tant qu'outils de formage à chaud et un outil, le dernier dans le sens de transport (9), étant agencé en tant qu'outil de trempe à la presse des flans de tôles (2), et le formage à chaud et la trempe sous presse des flans de tôle (2) étant effectués simultanément dans les outils lors de chaque course de la presse.
EP18807863.8A 2017-12-07 2018-11-13 Presse et procédé de formage à chaud et de trempe de flans de tôle Active EP3720624B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017129138 2017-12-07
PCT/DE2018/100920 WO2019110037A1 (fr) 2017-12-07 2018-11-13 Presse et procédé de formage à chaud et de trempe de flans de tôle

Publications (2)

Publication Number Publication Date
EP3720624A1 true EP3720624A1 (fr) 2020-10-14
EP3720624B1 EP3720624B1 (fr) 2023-10-04

Family

ID=64456733

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18807863.8A Active EP3720624B1 (fr) 2017-12-07 2018-11-13 Presse et procédé de formage à chaud et de trempe de flans de tôle

Country Status (6)

Country Link
EP (1) EP3720624B1 (fr)
ES (1) ES2962467T3 (fr)
HU (1) HUE064325T2 (fr)
PL (1) PL3720624T3 (fr)
PT (1) PT3720624T (fr)
WO (1) WO2019110037A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4608420B2 (ja) * 2005-11-22 2011-01-12 新日本製鐵株式会社 トランスファープレス装置
DE102014112244A1 (de) * 2014-08-26 2016-03-03 Benteler Automobiltechnik Gmbh Verfahren und Presse zur Herstellung wenigstens abschnittsweise gehärteter Blechbauteile
JP2016140893A (ja) * 2015-02-03 2016-08-08 豊田鉄工株式会社 熱間プレス成形装置及び熱間プレス成形方法
DE102015221635A1 (de) * 2015-11-04 2017-05-04 Bayerische Motoren Werke Aktiengesellschaft Pressgehärtetes Blechformteil mit unterschiedlichen Blechdicken und Festigkeiten

Also Published As

Publication number Publication date
ES2962467T3 (es) 2024-03-19
HUE064325T2 (hu) 2024-03-28
PT3720624T (pt) 2023-12-05
WO2019110037A1 (fr) 2019-06-13
PL3720624T3 (pl) 2024-03-11
EP3720624B1 (fr) 2023-10-04

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