EP3720624B1 - 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 Download PDF

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Publication number
EP3720624B1
EP3720624B1 EP18807863.8A EP18807863A EP3720624B1 EP 3720624 B1 EP3720624 B1 EP 3720624B1 EP 18807863 A EP18807863 A EP 18807863A EP 3720624 B1 EP3720624 B1 EP 3720624B1
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EP
European Patent Office
Prior art keywords
press
sheet metal
tool
hot forming
tools
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EP18807863.8A
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German (de)
English (en)
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EP3720624A1 (fr
Inventor
Stephan Gante
Björn Müller
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GEDIA Gebrueder Dingerkus GmbH
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GEDIA Gebrueder Dingerkus GmbH
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Publication of EP3720624A1 publication Critical patent/EP3720624A1/fr
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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
    • 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 forming and hardening sheet metal blanks made of steel, with an upper part which has an upper tool part and a lower part which has a lower tool part, which can be moved towards and away from one another in a press stroke direction, with pressure surfaces between the tool parts at each Press stroke in the closed position of the tool, a sheet metal blank to be processed is arranged, the sheet metal blank resting on the lower tool part or its pressure surface and in the closed position of the tool is contacted by the upper tool part or its pressure surface, the press having a transport direction running transversely to the press stroke direction, in which sheet metal blanks are transported through the press, the press having several tools following one another in the transport direction for the simultaneous processing of several sheet metal blanks with each press stroke, the tools each having an upper tool part held on the upper part and a lower tool part held on the lower part, with at least two tools as hot forming tools and one tool, the last in the transport direction, is arranged as a tool for press hardening the sheet metal blanks, the hot
  • presses and processes for hot forming and hardening are widely known, whereby a sheet metal blank is heated to austenitizing temperature in an oven before forming processing and is then fed to the press and formed therein.
  • the press has a tool with an upper tool part and a lower tool part, with the upper tool part on the upper part of the press, for example a ram plate, and the lower tool part on the lower part of the press, for example a table top, is arranged.
  • the sheet metal blank is placed between the upper part and the lower part of the press on the lower part of the tool and is deformed and hardened between the upper part of the tool and the lower part of the tool when the press is closed.
  • the press and thus the tools are held in a closed position for a few seconds so that the sheet metal blank is cooled and hardened during deformation in the press.
  • the desired shape of the sheet metal plate must be achieved within one press stroke, with the disadvantage that only a limited deformation of the sheet metal plate is possible without the plate being damaged by the deformation. Parts with particularly complex geometries that involve large deformation cannot therefore be manufactured.
  • Presses according to the preamble of claim 1 and methods according to the preamble of claim 10 are in the documents JP-A-2007 136535 , JP-A-2016 140893 and the DE-A-10 2014 113 344 described.
  • the object of the invention is to create a press and a method for hot forming and hardening sheet metal blanks with which parts made of sheet metal blanks with particularly complex geometries can be produced cost-effectively.
  • the invention proposes a press according to claim 1.
  • the sheet metal blanks are previously heated to the austenitizing temperature and then fed to the press. Each sheet metal blank is then increasingly deformed in at least two hot forming tools. Depending on the desired degree of deformation Three, four or more hot forming tools can also be arranged in the press, in which the sheet metal blanks are gradually deformed, so that even a particularly strong deformation does not cause any damage to the blank.
  • a sheet metal plate is arranged on each lower tool part or its pressure surface, the upper tool parts with their pressure surfaces being pressed onto the lower tool part in the press stroke direction when the press is closed, and one sheet metal plate between an upper tool part and a lower tool part is processed by their pressure surfaces.
  • each hot forming tool and in the tool for press hardening a sheet metal blank is processed with each press stroke, so that at least three sheet metal blanks are processed simultaneously during a press stroke. After processing in the last tool, the hardened part is removed from the press.
  • the parts can be manufactured cost-effectively.
  • at least the upper tool part of the last tool is held on the upper part with a spring and whose pressure surface protrudes relative to the pressure surfaces of the hot forming tools when the press is at least partially open, and the pressure surfaces of the lower tool parts are arranged at least approximately aligned with one another, the closed position of the last Tool before reaching the closed position of the hot forming tools is reached and maintained with yielding of the spring and is maintained until the closed position of all hot forming tools, whereby the closed position of all tools is only reached when the press is completely closed and that the hot forming tools are opened when leaving the closed position of the press, with the last tool only being opened when one is reached specified opening position of the press, lagging behind the opening position of the other tools.
  • the last upper tool part protrudes with its pressure surface in the at least partially open state of the press relative to the pressure surfaces of the upper tool parts of the hot forming tools and the last upper tool part with its pressure surface touches the sheet metal plate assigned to this tool when the press is closed before the The upper parts of the hot forming tools or their pressure surfaces touch the sheet metal blanks.
  • the closed position of the last tool is therefore reached before the press is completely closed and before the hot forming tools have reached the closed position.
  • the last upper part of the tool is held resiliently on the upper part of the press by a spring and is pressed towards the upper part of the tool by the contact with the sheet metal blank when the press is closed until the Press is completely closed. Only then are the hot forming tools in the closed position, in which the sheet metal blanks are formed between their pressure surfaces.
  • the hot forming tools are opened at the same time, while the last tool remains in the closed position and its pressure surfaces are still in resilient contact with the sheet metal blank until the press reaches a specified opening position. Only after this opening position is exceeded is the last tool opened and the sheet metal blank can be removed from the press.
  • the contact between the sheet metal blank and the pressure surfaces of the last tool is extended and the sheet metal blank hardens optimally, while the hot forming tools are only in contact with the sheet metal blanks for a short closing moment.
  • the press can perform continuous lifting movements, without interruption, being the last
  • the sheet metal blank is held in the last tool for a few seconds and has hardened optimally.
  • the tools are arranged close to one another in the press.
  • the opening position of the press and the opening of the last tool are determined by the travel of the spring.
  • the spring travel determines the opening position at which the last tool opens. Depending on the length of the spring travel, the holding time in the last tool can be longer or shorter.
  • the pressure surfaces of the hot forming tools are aligned with one another.
  • the hot forming tools have a heating system.
  • the temperature of the sheet metal blanks in the hot forming tools is kept at a temperature that is particularly advantageous for the subsequent hardening in the last tool.
  • the tool for hardening the sheet metal blanks has a cooling system.
  • the sheet metal blank Due to the cooling, the sheet metal blank is quickly cooled or quenched in the hardening tool, so that the desired structure is formed in the sheet metal blank.
  • the spring is a mechanical spring, a gas spring or a hydraulic spring.
  • the spring is adjusted or designed in such a way that the upper part of the tool acts on the sheet metal blank with a desired force, for example with the nominal pressing force of the press, upon first contact with the sheet metal blank and is evenly adjustable in the direction of the upper portion of the press until the press is completely closed.
  • the springs mentioned are particularly suitable for this.
  • the spring is a hydraulic spring which is connected to the hydraulic circuit of the press and is adjustable or adjusted via this.
  • the hot forming tools have a cutting, punching or similar separating or processing device.
  • the sheet metal blanks are thus trimmed or perforated or processed in another way while they are warm and at the same time as the hot forming. This eliminates the need for time-consuming rework of the sheet metal blanks.
  • the sheet metal blanks Before the sheet metal blanks are processed in the press, they are heated to austenitization temperature in an oven and fed to the press at a temperature of around 850°C. Each sheet metal blank is then increasingly deformed in at least two hot forming tools. The gradual deformation prevents the boards from being damaged during processing. Depending on the degree of deformation, three, four or more hot forming tools can be provided in the press, in which the sheet metal blanks are gradually deformed.
  • the sheet metal blanks are then hardened in the last tool.
  • the sheet metal blanks are transported intermittently through the press, with each sheet metal blank being transported in the transport direction to a tool when the press is open and remaining in this while the press and the tools arranged therein are closed for the duration of the processing until the press opens again and the sheet metal blank is transported to the next tool.
  • a sheet metal plate is placed on each lower part of the tool or its printing surface.
  • the press then closes and the upper tool parts are adjusted towards the lower tool part until they contact the sheet metal blanks in a closed position.
  • the sheet metal blanks are processed with the press completely closed between the pressure surfaces of the upper tool parts and the lower tool parts, with the blanks being hot-formed in the tools arranged first in the transport direction and hardened in the last tool. After processing in the last tool, the finished part is removed from the press.
  • the processing of the sheet metal blanks in the tools takes place simultaneously with each press stroke, so that at least three sheet metal blanks are processed simultaneously during one press stroke.
  • the upper tool part of the last tool contacts and processes the sheet metal plate arranged on the lower tool part during the closing of the press before reaching the upper tool parts of the hot forming tools, with the upper tool part resiliently contacting the sheet metal plate and the upper tool part in the direction until the press is completely closed of the upper part is moved resiliently in the press stroke direction until the last tool and the hot forming tools reach the closed position with the press completely closed, the hot forming tools opening immediately when the press opens and releasing the sheet metal blanks while the last upper tool part is still in contact with the sheet metal blank.
  • the last upper tool part or its pressure surface contacts the sheet metal plate when the tool is closed Press resiliently before the other upper tool parts or their pressure surfaces contact the sheet metal blanks. Due to the resilient arrangement of the last upper tool part on the upper part of the press, after reaching the closed position of the tool while the press is closing, the upper tool part can be pressed towards the upper part and escape until the upper tool parts of the hot forming tools or their pressure surfaces touch the sheet metal blanks and the hot forming tools reach the closed position.
  • the hot forming tools are opened first and the sheet metal blanks are ready for further transport to the next tool, with the last tool or its pressure surfaces resiliently contacting the last sheet metal blank until the press reaches a specified opening position. Only when this opening position is exceeded is the last tool opened and the sheet metal blank is removed from the tool.
  • This configuration extends the contact between the last sheet metal blank and the pressure surfaces of the last tool and ensures that the sheet metal blank hardens while the hot forming tools only process the sheet metal blanks for a short closing moment.
  • This process can also be carried out with mechanical presses, as their press strokes can run continuously and at the same time a holding time for the sheet metal blanks in the last tool is achieved.
  • the hot forming tools heat the sheet metal blanks during hot forming.
  • the sheet metal blanks maintain a preferred temperature for hardening until they reach the last processing station.
  • the last tool in the transport direction cools or quenches the sheet metal blank during processing.
  • At least one further processing is carried out during the hot forming of the sheet metal blanks in the hot forming tools, preferably the sheet metal blank is trimmed and/or perforated.
  • the boards can be cut or punched while warm. This eliminates the need for time-consuming rework on the sheet metal blanks.
  • the sheet metal plate consists of 20MnB8.
  • the material 20MnB8 is particularly suitable because it still has a suitable temperature for hardening even after three hot forming stages, preferably around 450°C, and at this temperature it hardens optimally in the last processing station and forms the desired structure.
  • the figures show a press 1 with several tools for hot forming and hardening sheet metal blanks 2 made of steel, with an upper part 3, which has several upper tool parts 4,4a,4b,4c and a lower part 5, which has several lower tool parts 6,6a,6b,6c which can be moved towards and away from each other in a press stroke direction 7.
  • a sheet metal plate 2 is placed between two pressure surfaces 8,8';8a,8a';8b,8b';8c,8c' of the tool parts 4,6;4a,6a ;4b,6b;4c,6c processed, with the sheet metal blanks 2 on the lower tool parts 6,6a,6b,6c or their pressure surfaces 8',8a',8b',8c' rest and in the closed position of the tool is contacted by the respective upper tool part 4,4a,4b,4c or its pressure surface 8,8a,8b,8c.
  • the press 1 has a transport direction 9 running transversely to the press stroke direction 7, in which the sheet metal blanks 2 are transported intermittently through the press 1.
  • the sheet metal blanks 2 are fed to the press 1, they are heated to the austenitizing temperature in an oven.
  • the sheet metal blanks 2 are then fed to the press 1 at a temperature of approximately 850 ° C and intermittently transported through the press 1 in a transport direction 9.
  • the sheet metal blanks 2 are processed in several tools that follow each other in the transport direction 9, with the sheet metal blanks 2 being transported to the tools when the press 1 is open and further transport is suspended for the time of processing in the tools.
  • the press 1 opens and the sheet metal blanks 2 are transported further in the transport direction 9 and fed to the subsequent tool, with the last sheet metal blank 2 being removed from the press 1 after processing in the last tool.
  • the three tools arranged first in the transport direction 6 are designed as hot forming tools for hot forming each sheet metal blank 2.
  • Each sheet metal blank 2 is increasingly deformed in these three hot forming tools.
  • Four or more hot forming tools can also be arranged in the press 1, in which the sheet metal blanks 2 are deformed step by step, for example to enable larger deformations of the sheet metal blanks 2 without them suffering damage during the production of particularly complex geometries.
  • each sheet metal blank 2 is fed to the last tool in the transport direction 9, which is intended for hardening the sheet metal blanks 2. After hardening, the finished part is removed from the press 1.
  • a sheet metal plate 2 is placed on each lower tool part 6,6a,6b,6c or its pressure surface 8',8a',8b',8c', with the upper tool parts 4,4a,4b,4c with their pressure surfaces 8, 8a, 8b, 8c are pressed onto the respective lower tool part 6, 6a, 6b, 6c in the press stroke direction 7 when the press 1 is closed.
  • a sheet metal blank 2 is placed between an upper tool part 4,4a,4b,4c and a lower tool part 6,6a,6b,6c through their pressure surfaces 8,8 ⁇ ;8a,8a ⁇ ;8b,8b ⁇ ;8c,8c ⁇ edited.
  • a sheet metal blank 2 is formed with each press stroke processed so that four sheet metal blanks 2 are processed at the same time.
  • the tools are arranged close to each other in the press 1, with the sheet metal blanks 2 only having to travel short transport distances between the tools. This enables each sheet metal blank 2 to be transported quickly to the next tool and the temperature loss of the sheet metal blank 2 during transport is only small, so that the sheet metal blanks 2 still have a sufficient temperature for hardening when they reach the last tool.
  • a mechanical press is used as press 1 in order to be able to produce the parts particularly cost-effectively.
  • the holding time of the sheet metal blank 2 in the last tool is extended. This is done in that the upper tool part 4c of the last tool is held resiliently on the upper part 3 and its pressure surface 8c protrudes relative to the pressure surfaces 8, 8a, 8b of the hot forming tools when the press 1 is at least partially open, and the pressure surfaces 8 ', 8a', 8b''8c' of the lower tool parts 6,6a,6b,6c are arranged at least approximately aligned with one another.
  • the press 1 is at least partially open.
  • Fig. 2 shows that the closed position of the last tool is reached before the hot forming tools reach the closed position.
  • the upper tool part 4c of the last tool is with the sheet metal blank before reaching the Closing position of the press 1 is in resilient contact, while the other upper tool parts 4, 4a, 4b do not yet touch the sheet metal blanks 2.
  • the closed position of all tools is only reached when the press 1 is completely closed, as shown in Fig. 3 is shown. In this position, all upper tool parts 4,4a,4b,4c are in contact with the sheet metal blanks 2 and the pressure surfaces 8,8a,8b,8c or 8',8a',8b',8c' of the upper tool parts 4,4a,4b, 4c or the lower tool parts 6,6a,6b,6c are arranged aligned with one another.
  • the hot forming tools also open, with the last tool only being opened when the press 1 reaches a specified opening position and the last upper tool part 4c making resilient contact with the sheet metal blank 2 until the press 1 reaches the opening position .
  • the holding time of the sheet metal blank 2 in the last tool is extended and the sheet metal blank 2 hardens optimally, while the tool parts 4,6; 4a, 6a; 4b, 6b of the hot forming tools are only in contact with the sheet metal blanks 2 for a short closing moment.
  • the last upper tool part 4c is held on the upper tool part 3 with a spring 15, preferably a mechanical spring 15, a gas spring or a hydraulic spring 15.
  • the spring 15 is adjusted or designed so that the upper tool part 4c acts on the sheet metal blank 2 with a desired force, for example with the nominal pressing force of the press 1, as soon as and as long as it does so Sheet metal circuit board 2 contacted. Until the press 1 is completely closed, the upper tool part 4c is pressed evenly towards the upper part 3. If a hydraulic spring 15 is used, it is particularly advantageous to connect it to the hydraulic circuit of the press 1 and adjust it via this, since the spring 15 can then be adjusted with repeat accuracy to the press stroke of the press 1.
  • the opening position of the press 1, at which the last tool opens, is determined by the spring travel of the spring 10. Only after this opening position has been exceeded, when the spring is completely relaxed, is the last tool opened and the sheet metal blank 2 can be removed from the press 1.
  • This configuration makes it possible for the press 1 to carry out the successive press strokes continuously without a break, while at the same time ensuring an extended holding time in the hardening tool.
  • the upper tool parts 4, 4a, 4b and/or the lower tool parts 6, 6a, 6b of the hot forming tools are heated.
  • the upper tool part 4c and/or the lower tool part 6c of the last tool have cooling, so that the sheet metal blank 2 is quickly cooled or quenched in the last tool and the desired structure in the sheet metal plate 2 can be adjusted.
  • the hot forming tools can additionally have a cutting, punching or similar separating or processing device so that the sheet metal blanks 2 can be trimmed or punched, for example, in the warm state and at the same time as the hot forming. This eliminates the need for time-consuming post-processing of the sheet metal blanks 2.
  • materials are preferably used which maintain a sufficient temperature for hardening until the last hot forming stage in order to be hardened in the last tool.
  • the material 20MnB8, for example, is suitable for this because it still has a temperature of 450 ° C even after three hot forming stages and still cures optimally at this temperature in the last processing station 10.

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  • 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)

Claims (13)

  1. Presse (1) de formage à chaud et de trempe de flans de tôle (2) en acier, comprenant une partie supérieure (3) qui possède une partie supérieure d'outil (4), et une partie inférieure (5) qui possède une partie inférieure d'outil (6), qui peuvent être déplacées en direction et à l'écart l'une de l'autre dans une direction de poussée de presse (7), dans laquelle un flan de tôle (2) à traiter est disposé entre des surfaces de pression (8, 8') des parties d'outil (4, 6) pendant chaque course de presse dans la position fermée de l'outil, dans laquelle le flan de tôle s'appuie sur la partie d'outil inférieure (6) ou la surface de pression (8') de celle-ci et, dans la position fermée de l'outil, est contactée par la partie supérieure de l'outil (4) ou la surface de pression (8) de celle-ci, la presse (1) ayant une direction de transport (9) s'étendant transversalement à la direction de course de la presse (7), dans laquelle les flans de tôle (2) sont transportés à travers la presse (1), la presse (1) comportant une pluralité d'outils se suivant les uns les autres dans la direction de transport (9) pour le traitement simultané d'une pluralité de flans de tôle (2) lors de chaque course de presse, les outils comportant chacun une partie d'outil supérieure (4, 4a, 4b, 4c) maintenue sur la partie supérieure (3) et une partie d'outil inférieure (6, 6a, 6b, 6c) maintenue sur la partie inférieure (5), dans laquelle au moins deux outils sont disposés comme outils de formage à chaud et un outil, le dernier dans la direction de transport (9), comme outil de trempe sur presse des flans de tôle (2), dans laquelle le formage à chaud et la trempe sur presse des flans de tôle (2) dans les outils sont effectués simultanément pendant chaque course de presse, caractérisé en ce qu'au moins la partie supérieure (4c) du dernier outil est maintenue sur la partie supérieure (3) par un ressort (10) et que sa surface de pression (8c) fait saillie par rapport aux surfaces de pression (8, 8a, 8b) des outils de formage à chaud lorsque la presse (1) est au moins partiellement ouverte, et que les surfaces de pression (8', 8a', 8b', 8c') des parties inférieures des outils (6, 6a, 6b, 6c) sont disposées au moins approximativement dans l'alignement les unes des autres, la position fermée du dernier outil étant atteinte avant que la position fermée des outils de formage à chaud ne soit atteinte et étant maintenue avec l'affaiblissement du ressort (10) et étant maintenue jusqu'à ce que tous les outils de formage à chaud soient fermés, la position fermée de tous les outils n'étant atteinte que lorsque la presse (1) est complètement fermée, et que les outils de formage à chaud sont ouverts lorsque la presse (1) quitte la position fermée, le dernier outil n'étant ouvert que lorsque la presse (1) atteint une position ouverte définie, en retard par rapport à la position ouverte des autres outils.
  2. Presse (1) selon la revendication 1, caractérisée en ce que les outils sont disposés à proximité les uns des autres dans la presse (1).
  3. Presse (1) selon la revendication 1, caractérisée en ce que la position d'ouverture de la presse (1) et l'ouverture du dernier outil sont déterminées par la course du ressort (10).
  4. Presse selon une des revendications 1 à 3, caractérisée en ce que les surfaces de pression (8, 8a, 8b) des outils de formage à chaud sont alignées l'une par rapport à l'autre.
  5. Presse (1) selon une des revendications 1 à 4, caractérisée en ce que les outils de formage à chaud sont dotés d'un système de chauffage.
  6. Presse (1) selon une des revendications 1 à 5, caractérisée en ce que l'outil de trempe des flans de tôle (2) est doté d'un système de refroidissement.
  7. Presse (1) selon la revendication 1, caractérisée en ce que le ressort (10) est un ressort mécanique, un ressort à gaz ou un ressort hydraulique.
  8. Presse (1) selon la revendication 1, caractérisée en ce que le ressort (10) est un ressort hydraulique qui est relié au circuit hydraulique de la presse (1) et qui est réglable ou réglé par le circuit hydraulique.
  9. Presse (1) selon une des revendications 1 à 8, caractérisée en ce que les outils de formage à chaud comprennent un dispositif de coupe, de poinçonnage ou de coupe ou d'usinage similaire.
  10. Procédé de formage à chaud et de trempe de flans de tôle (2) dans une presse, en particulier dans une presse (1) selon l'une des revendications 1 à 7, avec une partie supérieure (3), qui a une partie d'outil supérieure (4) et une partie inférieure (5), qui a une partie d'outil inférieure (6), qui sont déplacées vers et éloignées l'une de l'autre pendant une course de presse dans une direction de course de presse (7), dans laquelle un flan de tôle (2) est traité entre les surfaces de pression (8, 8') des parties d'outil (4, 6) pendant chaque course de presse dans la position fermée de l'outil, dans lequel le flan de tôle est appliqué sur la partie inférieure de l'outil (6) ou sur sa surface de pression (8') et est contacté en position fermée de l'outil par la partie supérieure de l'outil (4) ou sa surface de pression (8) lorsque la presse (1) est fermée, dans lequel la presse (1) a une direction de transport (9) s'étendant transversalement à la direction de la course de pressage (7), dans laquelle les flans de tôle (2) sont transportés à travers la presse (1), dans laquelle les flans de tôle (2) sont transportés par intermittence à travers la presse (1) et sont traités simultanément dans la presse (1) par des outils se succédant dans la direction de transport (9) lors de chaque course de pressage, dans lequel les flans de tôle (2) sont traités entre les surfaces de pression (8, 8a, 8b, 8c) des parties supérieures des outils (4, 4a, 4b, 4c) et les surfaces de pression (8', 8a', 8b', 8c') des parties inférieures des outils (6, 6a, 6b, 6c), dans lequel les flans de tôle (2) sont de plus en plus formés à chaud dans les outils disposés en premier dans la direction de transport (9), qui sont des outils de formage à chaud, et sont pressurisés dans le dernier outil et sont transportés après chaque course de pressurage vers l'outil suivant dans la direction de transport (9), dans lequel le flan de tôle (2) pressurisé dans le dernier outil est retiré de la presse (1) après chaque course de travail, caractérisé en ce que la partie supérieure de l'outil (4c) du dernier outil contacte et traite le flan de tôle (2) disposé sur la partie inférieure de l'outil (6c) pendant la fermeture de la presse (1) à temps avant d'atteindre les parties supérieures de l'outil (4, 4a, 4b) des outils de formage à chaud, dans lequel la partie supérieure de l'outil (4c) entre en contact élastique avec le flan de tôle (2) et la partie supérieure de l'outil est déplacée élastiquement dans la direction de la partie supérieure dans la direction de la course de pressage (7) jusqu'à ce que la presse se ferme complètement, jusqu'à ce que le dernier outil et les outils de formage à chaud atteignent la position de fermeture avec le pressage complètement fermé, les outils de formage à chaud s'ouvrant immédiatement avec l'ouverture de la presse et libérant les flans de tôle (2), tandis que la dernière partie supérieure de l'outil (4c) reste en contact avec le flan de tôle (2) jusqu'à ce qu'une position d'ouverture fixe de la presse (1) soit atteinte.
  11. Procédé selon la revendication 10, caractérisé en ce que les outils de formage à chaud chauffent les flans de tôle (2) pendant le formage à chaud.
  12. Procédé selon une des revendications 10 ou 11, caractérisé en ce que le dernier outil dans la direction du transport refroidit ou trempe les flans de tôle (2) pendant l'usinage.
  13. Procédé selon une des revendications 10 à 12, caractérisé en ce que pendant le formage à chaud des flans de tôle (2) dans les outils de formage à chaud, au moins une autre opération d'usinage est effectuée, de préférence le flan de tôle (2) est rogné et/ou poinçonné.
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)

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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

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EP3720624B1 true EP3720624B1 (fr) 2023-10-04

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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

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EP3720624A1 (fr) 2020-10-14
HUE064325T2 (hu) 2024-03-28
PT3720624T (pt) 2023-12-05
ES2962467T3 (es) 2024-03-19
WO2019110037A1 (fr) 2019-06-13

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