EP2931453B1 - Hot forming method and device - Google Patents
Hot forming method and device Download PDFInfo
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- EP2931453B1 EP2931453B1 EP13811422.8A EP13811422A EP2931453B1 EP 2931453 B1 EP2931453 B1 EP 2931453B1 EP 13811422 A EP13811422 A EP 13811422A EP 2931453 B1 EP2931453 B1 EP 2931453B1
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- tool
- section
- forming
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- hot forming
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- 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
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- 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
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- 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
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
Definitions
- the invention relates to hot forming apparatus for hot working and / or press hardening of workpieces according to the subject matter of claim 1 and to a method for hot forming and / or press hardening according to the subject matter of claim 10.
- Hot forming devices for hot working or / and press hardening of workpieces are known and, for example in the DE 10 2007 047 314 A1 and in the EP 2 233 593 A2 described.
- the cycle time of the individual stations should be approximately equal to avoid dead times and thus to achieve optimum workpiece throughput.
- Hot forming devices in which workpieces are to be formed which, in addition to press-hardened regions, should also have ductile regions, require a considerably higher cycle time than the other stations if the workpiece in the tool cools down to such an extent that it no longer becomes distorted after removal from the mold suffers, thus forming a "bottleneck" in the technological process.
- the object of the present invention is to specify an apparatus and a method for hot working or / and press hardening of workpieces which does not have the mentioned disadvantages.
- the second tool also has a first tool section, which is provided for forming the hardened workpiece section, and has a second tool section, which is provided for forming the ductile workpiece section.
- Particularly preferred embodiments of the hot forming device may have the advantage that the total cycle time required is divided between two essentially identical tools, so that a higher workpiece throughput compared to a forming station can be achieved with only one tool. Ideally, the workpiece throughput is doubled.
- Another advantage is that due to the planned cooling in the tool no delay can occur.
- the delay can occur when cooled outside the tool, especially for workpieces that are made of different materials, for example, with different coefficients of expansion, or have areas of different material thickness. Rework may be required to achieve high dimensional accuracy of the workpiece. In the treated in the proposed device workpiece no distortion occurs.
- the first and second tool sections need not be contiguous. It can be provided, for example, that a first tool section is arranged between two second tool sections or vice versa.
- so-called crumple zones which can absorb impact energy, can be formed by second tool sections with ductile formation in workpieces intended for installation in motor vehicles.
- the setpoint temperature of the first tool in the first tool section is approximately 20 ° C. and in the second tool section 300 to 400 ° C.
- the temperature specification "about 20 ° C" here means that it is the ambient temperature of the tool.
- first and the second tool portion of the first tool are integrally formed.
- the two workpiece sections are delimited from one another only by different setpoint temperatures.
- first and the second tool section of the first tool are separated by an expansion joint.
- a compensating element is arranged, which is separated by expansion joints of the first and the second tool portion.
- the second tool has a first tool section, which is provided for forming the hardened workpiece section, and a second tool section, which is used to form the ductile workpiece section is provided has.
- the two tool sections can be delimited analogously to the two tool sections of the first tool.
- the setpoint temperature of the second tool in the first tool section is about 20 ° C and in the second tool section is 20 to 200 ° C. It may thus be provided, for example, that the setpoint temperature in the first tool section is 20 ° C and in the second tool section 200 ° C.
- the cooling time of the second workpiece section, which is formed ductile, is thus further increased and shifted into the storage phase of the removed from the device workpiece.
- the temperature specification "about 20 ° C" here means that it is the ambient temperature of the tool.
- the forming stations may comprise additional devices for processing the workpieces, for example punching and trimming devices.
- additional devices for example punching and trimming devices.
- these devices are arranged in the second tool sections, in which the workpiece is formed ductile and / or in the first tool section of the first tool. If the additional devices act during hot working prior to press hardening, there will be no increased wear on the cutting elements of the devices.
- an industrial robot is arranged, which is designed such that it removes a machined workpiece from the first forming station and stores in the second forming station for further processing.
- the term "industrial robot” is understood here also transport devices that work, for example, with intermittently moving gripper bars or the like.
- a control device In order to control the hot-forming device, a control device according to the invention is provided, the control device having inputs connected to temperature sensors arranged on the tool sections of the tools and having outlets connected to tempering devices cooperating with the tool sections of the tools.
- the control device can have further inputs and outputs and, for example, also be provided for controlling further stations which are upstream and / or downstream of the hot-forming device.
- the tempering device comprises a cooling circuit with cooling channels arranged in the tool sections of the tools, a heat exchanger and a coolant compressor.
- the object of the invention is further achieved by a method according to claim 10.
- the proposed method has the advantage that the cycle time corresponding to the cooling time, which is required for hot forming and / or press hardening in only one process step, is divided into two process steps with two cycle times, each individually shorter than the aforementioned cycle time. This achieves a higher workpiece throughput.
- Another advantage of the proposed method is that due to the planned cooling in the tool no delay can occur.
- the delay can occur during cooling outside the tool, in particular for workpieces that are made of different materials, for example, with different coefficients of expansion, or regions of different material thickness, occur and require rework to achieve a high dimensional accuracy of the workpiece. In the proposed method, this rework is not required.
- the target temperature of the first tool in the first tool section is set to approximately 20 ° C. and in the second tool section is in the range from 300 to 400 ° C.
- the temperature specification "about 20 ° C" here means that it is the ambient temperature of the tool.
- the setpoint temperature of the second tool in a first tool section, which is provided for forming the hardened workpiece section is about 20 ° C. and in a second tool section, which is provided for forming the ductile workpiece section, in the range of approx 20 to 200 ° C is set. Under the Temperature indication "about 20 ° C" is understood here that it is the ambient temperature of the tool.
- first cooling time for forming the hardened workpiece section and that the sum of the first cooling time and the second cooling time for forming the ductile workpiece section is provided.
- the cooling time of the second workpiece section is thus further increased, and the storage phase of the workpiece removed from the device is used for complete cooling.
- Fig. 1 shows a hot forming device 1, which is for hot forming and / or press hardening of sheet metal blanks and / or sheet metal parts made of steel with different material thickness, hereinafter referred to as workpiece 4, is provided.
- the workpiece is heated to a temperature above the Austenitmaschinestemperatur for hot forming with respect to subsequent press hardening and fixed between a tool upper part and a lower tool part of a forming and / or pressing tool and subjected to a pressing pressure. That's the hot forming. Thereafter, the workpiece in the tool is rapidly cooled below the austenitizing temperature, that is quenched.
- press hardening which is also known as tempering because it takes place in a closed mold.
- Ductile sections may also be provided to form ductile sections in the workpiece except for hardened sections. Ductile sections must be cooled considerably slower than during press hardening, so that no martensitic transformation takes place.
- the hot forming device 1 has a frame-shaped frame 11, in which a first forming station 2 with a first tool 3 and a second forming station 2 'with a second tool 3', which is formed with the shape contour of the first tool 3, are arranged. Between a tool upper part 31 and a lower tool part 32, the workpiece 4 can be arranged. In the in Fig. 1 illustrated embodiment is at the workpiece 4 to a plate-shaped sheet metal blank made of a high-strength hardenable steel.
- the upper tool part 31 is rigidly connected to a head plate 12.
- the head plate 12 is rigidly connected to an output of a supported on the frame 11 drive 13.
- the lower tool part 32 is arranged on a support plate 11 supported on the base plate 14 and rigidly connected thereto.
- the tool top 31 may be formed as a die, and the tool base 32 may be formed as a die, or vice versa.
- the tools 3 and 3 'and thus the tool shells 31 and tool chocks 32 include a first tool portion 33 provided for forming the hardened workpiece portion and a second tool portion 34 provided for forming the ductile workpiece portion (see Fig. 2 to 4 ).
- the tools 3 and 3 'further comprise means for regulating the temperature of the first and second tool sections 33, 34, as described below Fig. 6 described in more detail.
- the upper tool part 31 and the lower tool part 32 in their the workpiece 4 facing pressing surfaces near the tool surface cooling channels 35, which with a in Fig. 1 not shown cooling circuit are connected.
- the cooling channels 35 are flowed through by a cooling medium, which dissipates heat from the workpiece 4.
- the first tool sections 33 and the second tool sections 34 of the two tools 3 and 3 ' have separate cooling circuits in order to be able to set different setpoint temperatures which correspond to the target end temperature of the workpiece section to be reached after a predetermined cycle time.
- heating means may be provided to preheat, if necessary, cold tools to a temperature above ambient temperature.
- the first tool 3 in the second tool section 34 is heated to 300 to 400 ° C.
- the workpiece 4 successively passes through a heating station 8, the first forming station 2 and the second forming station 2 '.
- an industrial robot 5 is arranged, which removes the machined in the first forming station 2 workpiece 4 of the first forming station 2 and stores in the second forming station 2' for further processing.
- Further industrial robots 5 are arranged between a storage station 6 for unprocessed workpieces and the heating station 8, the heating station 8 and the first forming station 2, and the second forming station 2 'and a storage station 7 for machined workpieces.
- Fig. 2 shows a schematic plan view of the tool lower parts 32 of the juxtaposed tools 3 and 3 'with applied workpieces 4.
- the tools 3 and 3' as mentioned above, each have a first and a second tool portion 33, 34 which in the in Fig. 2 illustrated embodiment are integrally formed.
- the second tool 3 ' is formed with the shape contour of the first tool 3, that is, the inner contour of the second tool 3' corresponds to the outer contour of the first tool 3 removed workpiece 4. In this way it is ensured that in the second tool 3 ', the press hardening of the workpiece 4 can be continued.
- Fig. 3 shows a temperature-time diagram that illustrates the process steps performed in the hot forming device 1 in the two forming stations 2 and 2 'and explained below.
- a workpiece 4 is removed from a workpiece stack formed on the storage station 6 for unprocessed workpieces and deposited in the heating station 8.
- the workpiece 4 deposited in the heating station 8 is heated to a temperature above the austenitizing temperature of its steel material.
- the heated workpiece 4 is removed from the heating station 8 and deposited in the opened tool 3 of the first forming station 2.
- a fourth method step the tool 3 of the forming station 2 is closed and the heated workpiece 4 is hot-formed.
- the formed workpiece 4 is partially press-hardened when the tool 3 is closed.
- the workpiece 4 has in the temperature of the workpiece section to be hardened at time t 1 is T 11 , and a temperature T 21 is present in the workpiece section to be formed in a ductile manner.
- the temperatures T 11 and T 21 are equal and correspond to the temperature of the workpiece 4 after the forming, in which a small cooling of the workpiece 4 can occur.
- the temperature indication "approx. 20 ° C" stands for the ambient temperature. It is therefore not intended or necessary to select a target temperature below the ambient temperature.
- the duration of the time interval .DELTA.t 1 is about 10 s, wherein at time t 2, the temperature T 12 of the workpiece 4 in the workpiece section to be hardened in the range of 60 to 150 ° C and the temperature T 22 of the workpiece 4 in the workpiece section to be formed ductile in the range of 400 to 500 ° C.
- a sixth method step the first tool 3 is opened and the partially hardened workpiece 4 is removed by the industrial robot 5 and stored in the opened second tool 3 '.
- the partially hardened workpiece 4 is finished hardened when the tool 3 'is closed.
- the workpiece 4 has the temperature T 12 in the workpiece section to be hardened at the time t 3, and the temperature T 22 in the workpiece section to be formed in a ductile manner.
- the target temperature of the second tool 3 'is in the first tool section 33 and in the second tool section 34 in the range of 20 to 200 ° C.
- the duration of the time interval .DELTA.t 2 is about 10 s, wherein at time t 4, the temperature T 12 of the workpiece 4 in the workpiece section to be hardened and in the workpiece section to be formed ductile is approximately the ambient temperature.
- a seventh method step the second tool 3 'is opened and the finished hardened workpiece 4 is removed by the industrial robot 5 and stored in the storage station 7 for machined workpieces.
- the first period ⁇ t 1 and the third period ⁇ t 3 are the same as described above in the example. Since the stored in the storage station 7 workpieces 4 are already cooled, no more distortion occurs.
- the Fig. 4a and 4b show a second embodiment of a hot forming device, which, like the in Fig. 3 described hot forming device is formed, with the difference that the first and the second tool portion 33, 34 of the first tool 3 are separated by a expansion joint 3d.
- the expansion joint 3d prevents thermal stresses in the first tool 3, which can occur due to the different temperatures of the first and second tool sections 33, 34.
- Fig. 4a shows the hot forming device 1 at the time when the first tool portion 33 of the first tool 3 has a temperature of about 20 ° C and the second tool portion 34 has a temperature in the range of 300 to 400 ° C.
- the expansion joint 3d between the first tool section 33 and the second tool section 34 has a minimum width, which is preferably 0 mm.
- Fig. 4b shows the hot forming device 1 at the time when the first tool portion 33 and the second tool portion 34 of the first tool 3 are cooled to ambient temperature.
- the expansion joint 3d has a maximum width, because the second tool section 34 of 300 cooled to 400 ° C to ambient temperature and therefore has a shortened length.
- the Fig. 5a and 5b show a third embodiment of a hot forming device, which like the in Fig. 4 described hot forming device is formed, with the difference that between the first and the second tool portion 33, 34 of the first tool 3, a compensating element 3a is arranged.
- the compensating element 3a abuts in the illustrated embodiment on the first tool section 33, so that the two expansion joints 3d have a different width.
- the forming stations 2 and 2 ' may comprise additional devices for processing the workpieces 4, for example punching and trimming devices.
- these devices are arranged in the second tool sections 34, in which the workpiece 4 is formed ductile and / or in the first tool section 33 of the first tool 3, so that no increased wear due to high hardness occurs.
- Fig. 6 shows a block diagram of the hot forming device 1, which illustrates the operation of the hot forming device.
- a control device 9 For controlling the hot forming device 1, a control device 9 is provided.
- the control device 9 has inputs which are connected to temperature sensors 9s, wherein the temperature sensors 9s are arranged on the first and second tool sections 33, 34 of the first tool 3 and the second tool 3 '.
- the controller 9 has outputs connected to control inputs of Tempering devices 10 are connected, which may be formed, for example, as cooling circuits with heat exchanger and compressor pump, wherein as in Fig. 1 illustrated, the tools 3, 3 'cross-cooling channels 35 form sections of the cooling circuits.
- At least one further output of the control device 9 is connected to the robot 5 arranged between the two forming stations 2 and 2 ', which transports the workpieces 4 from the first forming station 2 into the second forming station 2'.
- control device 9 may have further inputs and outputs to the in Fig. 1 illustrated storage station 6 and 7, the heating station 8 and the associated further robot 5 to drive and the in Fig. 3 to coordinate the described process flow.
- a computer-aided control device 9 is provided, in which the process flow is stored in a control software.
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Description
Die Erfindung betrifft Warmumformvorrichtung zum Warmumformen oder/und Presshärten von Werkstücken nach dem Gegenstand des Anspruchs 1 sowie ein Verfahren zum Warmumformen oder/und Presshärten nach dem Gegenstand des Anspruchs 10.The invention relates to hot forming apparatus for hot working and / or press hardening of workpieces according to the subject matter of
Warmumformvorrichtungen zum Warmumformen oder/und Presshärten von Werkstücken sind bekannt und beispielsweise in der
Es ist auch möglich, die Taktzeit zu reduzieren, indem die Werkstücke bereits aus dem Werkzeug entnommen werden, sobald das Presshärten abgeschlossen ist. Von Nachteil ist, dass beim weiteren Abkühlen auf Umgebungstemperatur außerhalb des Werkzeugs ein Verzug des Werkstücks eintreten kann, weil es nicht mehr im Werkzeug fixiert ist. Daraus resultiert kostenintensive Nacharbeit.It is also possible to reduce the cycle time by removing the workpieces from the tool as soon as the press hardening is completed. The disadvantage is that during further cooling to ambient temperature outside the tool, a delay of the workpiece may occur because it is no longer fixed in the tool. This results in costly rework.
Aufgabe der vorliegenden Erfindung ist es, eine Vorrichtung und ein Verfahren zum Warmumformen oder/und Presshärten von Werkstücken anzugeben, das die genannten Nachteile nicht aufweist.The object of the present invention is to specify an apparatus and a method for hot working or / and press hardening of workpieces which does not have the mentioned disadvantages.
Erfindungsgemäß wird diese Aufgabe mit dem Gegenstand des Anspruchs 1 gelöst.According to the invention, this object is achieved with the subject matter of
Bei bevorzugten Ausführungen kann vorgesehen sein, dass auch das zweite Werkzeug einen ersten Werkzeugabschnitt aufweist, der zum Ausbilden des gehärteten Werkstückabschnitts vorgesehen ist, und einen zweiten Werkzeugabschnitt aufweist, der zum Ausbilden des duktilen Werkstückabschnitts vorgesehen ist.In preferred embodiments, it may be provided that the second tool also has a first tool section, which is provided for forming the hardened workpiece section, and has a second tool section, which is provided for forming the ductile workpiece section.
Insbesondere bevorzugte Ausführungen der Warmumformvorrichtung können den Vorteil aufweisen, dass die insgesamt benötigte Taktzeit auf zwei im Wesentlichen identische Werkzeuge aufgeteilt ist, so dass ein höherer Werkstückdurchsatz gegenüber einer Umformstation mit nur einem Werkzeug erreichbar ist. Im Idealfall ist der Werkstückdurchsatz verdoppelt.Particularly preferred embodiments of the hot forming device may have the advantage that the total cycle time required is divided between two essentially identical tools, so that a higher workpiece throughput compared to a forming station can be achieved with only one tool. Ideally, the workpiece throughput is doubled.
Ein weiterer Vorteil ist, dass wegen der vorgesehenen Abkühlung im Werkzeug kein Verzug eintreten kann. Der Verzug kann bei Abkühlung außerhalb des Werkzeugs insbesondere bei Werkstücken eintreten, die aus unterschiedlichen Materialien, beispielsweise mit unterschiedlichen Ausdehnungskoeffizienten, ausgebildet sind oder Bereiche unterschiedlicher Materialdicke aufweisen. Es kann Nacharbeit erforderlich werden, um eine hohe Maßhaltigkeit des Werkstücks zu erreichen. Bei dem in der vorgeschlagenen Vorrichtung behandelten Werkstück tritt kein Verzug auf.Another advantage is that due to the planned cooling in the tool no delay can occur. The delay can occur when cooled outside the tool, especially for workpieces that are made of different materials, for example, with different coefficients of expansion, or have areas of different material thickness. Rework may be required to achieve high dimensional accuracy of the workpiece. In the treated in the proposed device workpiece no distortion occurs.
Der erste und der zweite Werkzeugabschnitt müssen nicht zusammenhängend ausgebildet sein. Es kann beispielsweise vorgesehen sein, dass ein erster Werkzeugabschnitt zwischen zwei zweiten Werkzeugabschnitten angeordnet ist oder umgekehrt. Beispielsweise können durch zweite Werkzeugabschnitte mit duktiler Ausbildung in Werkstücken, die zum Einbau in Kraftfahrzeuge vorgesehen sind, sog. Knautschzonen ausgebildet werden, die Aufprallenergie aufnehmen können.The first and second tool sections need not be contiguous. It can be provided, for example, that a first tool section is arranged between two second tool sections or vice versa. For example, so-called crumple zones, which can absorb impact energy, can be formed by second tool sections with ductile formation in workpieces intended for installation in motor vehicles.
Es kann vorgesehen sein, dass die Solltemperatur des ersten Werkzeugs in dem ersten Werkzeugabschnitt ca. 20 °C und in dem zweiten Werkzeugabschnitt 300 bis 400 °C ist. Unter der Temperaturangabe "ca. 20 °C" ist hier verstanden, dass es sich um die Umgebungstemperatur des Werkzeugs handelt.It can be provided that the setpoint temperature of the first tool in the first tool section is approximately 20 ° C. and in the second tool section 300 to 400 ° C. The temperature specification "about 20 ° C" here means that it is the ambient temperature of the tool.
Es kann weiter vorgesehen sein, dass der erste und der zweite Werkzeugabschnitt des ersten Werkzeugs einstückig ausgebildet sind. In diesem Fall sind die beiden Werkstückabschnitte lediglich durch unterschiedliche Solltemperaturen voneinander abgegrenzt.It can further be provided that the first and the second tool portion of the first tool are integrally formed. In this case, the two workpiece sections are delimited from one another only by different setpoint temperatures.
In einer alternativen Ausbildung kann vorgesehen sein, dass der erste und der zweite Werkzeugabschnitt des ersten Werkzeugs durch eine Dehnungsfuge getrennt sind. Mit Hilfe der Dehnungsfuge können Spannungen im Werkzeug vermieden werden, die durch unterschiedliche Wärmeausdehnung in den beiden Werkzeugabschnitten auftreten können.In an alternative embodiment it can be provided that the first and the second tool section of the first tool are separated by an expansion joint. By means of the expansion joint stresses in the tool can be avoided, which can occur due to differential thermal expansion in the two tool sections.
Es kann auch vorgesehen sein, dass zwischen dem ersten und dem zweiten Werkzeugabschnitt des ersten Werkzeugs ein Ausgleichselement angeordnet ist, das durch Dehnungsfugen von dem ersten und dem zweiten Werkzeugabschnitt getrennt ist.It can also be provided that between the first and the second tool portion of the first tool, a compensating element is arranged, which is separated by expansion joints of the first and the second tool portion.
In einer weiteren vorteilhaften Ausbildung kann vorgesehen sein, dass das zweite Werkzeug einen ersten Werkzeugabschnitt, der zum Ausbilden des gehärteten Werkstückabschnitts vorgesehen ist, und einen zweiten Werkzeugabschnitt, der zum Ausbilden des duktilen Werkstückabschnitts vorgesehen ist, aufweist. Die beiden Werkzeugabschnitte können analog zu den beiden Werkzeugabschnitten des ersten Werkzeugs abgegrenzt sein.In a further advantageous embodiment, it can be provided that the second tool has a first tool section, which is provided for forming the hardened workpiece section, and a second tool section, which is used to form the ductile workpiece section is provided has. The two tool sections can be delimited analogously to the two tool sections of the first tool.
Es kann vorgesehen sein, dass die Solltemperatur des zweiten Werkzeugs in dem ersten Werkzeugabschnitt ca. 20 °C und in dem zweiten Werkzeugabschnitt 20 bis 200 °C ist. Es kann also beispielsweise vorgesehen sein, dass die Solltemperatur in dem ersten Werkzeugabschnitt 20 °C ist und in dem zweiten Werkzeugabschnitt 200 °C ist. Die Abkühlzeit des zweiten Werkstückabschnitts, der duktil ausgebildet wird, ist damit noch weiter erhöht und in die Lagerungsphase des aus der Vorrichtung entnommenen Werkstücks verschoben. Unter der Temperaturangabe "ca. 20 °C" ist hier verstanden, dass es sich um die Umgebungstemperatur des Werkzeugs handelt.It can be provided that the setpoint temperature of the second tool in the first tool section is about 20 ° C and in the second tool section is 20 to 200 ° C. It may thus be provided, for example, that the setpoint temperature in the first tool section is 20 ° C and in the second tool section 200 ° C. The cooling time of the second workpiece section, which is formed ductile, is thus further increased and shifted into the storage phase of the removed from the device workpiece. The temperature specification "about 20 ° C" here means that it is the ambient temperature of the tool.
Die Umformstationen können zusätzliche Vorrichtungen zur Bearbeitung der Werkstücke umfassen, beispielsweise Vorrichtungen zum Lochen und Beschneiden. Vorzugsweise sind diese Vorrichtungen in den zweiten Werkzeugabschnitten angeordnet, in denen das Werkstück duktil ausgebildet wird und/oder in dem ersten Werkzeugabschnitt des ersten Werkzeugs. Wenn die zusätzlichen Vorrichtungen während des Warmumformens vor dem Presshärten wirken, tritt so kein erhöhter Verschleiß der Schneidelemente der Vorrichtungen ein.The forming stations may comprise additional devices for processing the workpieces, for example punching and trimming devices. Preferably, these devices are arranged in the second tool sections, in which the workpiece is formed ductile and / or in the first tool section of the first tool. If the additional devices act during hot working prior to press hardening, there will be no increased wear on the cutting elements of the devices.
Weiter kann vorgesehen sein, dass zwischen der ersten Umformstation und der zweiten Umformstation ein Industrieroboter angeordnet ist, der so ausgebildet ist, dass er der ersten Umformstation ein bearbeitetes Werkstück entnimmt und in der zweiten Umformstation zur weiteren Bearbeitung ablegt. Unter dem Begriff "Industrieroboter" sind hier auch Transportvorrichtungen verstanden, die beispielsweise mit taktweise bewegten Greiferbalken oder dergleichen arbeiten.It can further be provided that between the first forming station and the second forming station, an industrial robot is arranged, which is designed such that it removes a machined workpiece from the first forming station and stores in the second forming station for further processing. The term "industrial robot" is understood here also transport devices that work, for example, with intermittently moving gripper bars or the like.
Zur Steuerung der Warmumformvorrichtung ist erfindungsgemäß eine Steuerungseinrichtung vorgesehen, wobei die Steuerungseinrichtung Eingänge aufweist, die mit Temperatursensoren verbunden sind, die an den Werkzeugabschnitten der Werkzeuge angeordnet sind, und Ausgänge aufweist, die mit Temperierungseinrichtungen verbunden sind, die mit den Werkzeugabschnitten der Werkzeuge zusammenwirken. Die Steuerungseinrichtung kann weitere Einund Ausgänge aufweisen und beispielsweise auch zur Steuerung weiterer Stationen vorgesehen sein, die der Warmumformvorrichtung vor- und/oder nachgeschaltet sind.In order to control the hot-forming device, a control device according to the invention is provided, the control device having inputs connected to temperature sensors arranged on the tool sections of the tools and having outlets connected to tempering devices cooperating with the tool sections of the tools. The control device can have further inputs and outputs and, for example, also be provided for controlling further stations which are upstream and / or downstream of the hot-forming device.
Es kann vorgesehen sein, dass die Temperierungseinrichtung einen Kühlkreislauf mit in den Werkzeugabschnitten der Werkzeuge angeordneten Kühlkanälen, einen Wärmetauscher und einen Kühlmittelkompressor umfasst.It can be provided that the tempering device comprises a cooling circuit with cooling channels arranged in the tool sections of the tools, a heat exchanger and a coolant compressor.
Die Aufgabe der Erfindung wird weiter mit einem Verfahren nach dem Anspruch 10 gelöst.The object of the invention is further achieved by a method according to
Das vorgeschlagene Verfahren hat den Vorteil, dass die der Abkühlzeit entsprechende Taktzeit, die für das Warmumformen und/oder Presshärten in nur einem Prozessschritt benötigt wird, auf zwei Prozessschritte mit zwei Taktzeiten aufgeteilt wird, die jede für sich kürzer sind als die vorgenannte Taktzeit. Damit wird ein höherer Werkstückdurchsatz erreicht.The proposed method has the advantage that the cycle time corresponding to the cooling time, which is required for hot forming and / or press hardening in only one process step, is divided into two process steps with two cycle times, each individually shorter than the aforementioned cycle time. This achieves a higher workpiece throughput.
Ein weiterer Vorteil des vorgeschlagenen Verfahrens ist, dass wegen der vorgesehenen Abkühlung im Werkzeug kein Verzug eintreten kann. Der Verzug kann bei Abkühlung außerhalb des Werkzeugs insbesondere bei Werkstücken, die aus unterschiedlichen Materialien, beispielsweise mit unterschiedlichen Ausdehnungskoeffizienten, ausgebildet sind oder Bereiche unterschiedlicher Materialdicke aufweisen, eintreten und Nacharbeit erfordern, um eine hohe Maßhaltigkeit des Werkstücks zu erreichen. Bei dem vorgeschlagenen Verfahren ist diese Nacharbeit nicht erforderlich.Another advantage of the proposed method is that due to the planned cooling in the tool no delay can occur. The delay can occur during cooling outside the tool, in particular for workpieces that are made of different materials, for example, with different coefficients of expansion, or regions of different material thickness, occur and require rework to achieve a high dimensional accuracy of the workpiece. In the proposed method, this rework is not required.
Es kann vorgesehen sein, dass die Solltemperatur des ersten Werkzeugs in dem ersten Werkzeugabschnitt auf ca. 20 °C und in dem zweiten Werkzeugabschnitt im Bereich von 300 bis 400 °C eingestellt wird. Unter der Temperaturangabe "ca. 20 °C" ist hier verstanden, dass es sich um die Umgebungstemperatur des Werkzeugs handelt.It can be provided that the target temperature of the first tool in the first tool section is set to approximately 20 ° C. and in the second tool section is in the range from 300 to 400 ° C. The temperature specification "about 20 ° C" here means that it is the ambient temperature of the tool.
Weiter kann vorgesehen sein, dass die Solltemperatur des zweiten Werkzeugs in einem ersten Werkzeugabschnitt, der zum Ausbilden des gehärteten Werkstückabschnitts vorgesehen ist, auf ca. 20 °C und in einem zweiten Werkzeugabschnitt, der zum Ausbilden des duktilen Werkstückabschnitts vorgesehen ist, im Bereich von ca. 20 bis 200 °C eingestellt wird. Unter der Temperaturangabe "ca. 20 °C" ist hier verstanden, dass es sich um die Umgebungstemperatur des Werkzeugs handelt.Furthermore, it can be provided that the setpoint temperature of the second tool in a first tool section, which is provided for forming the hardened workpiece section, is about 20 ° C. and in a second tool section, which is provided for forming the ductile workpiece section, in the range of approx 20 to 200 ° C is set. Under the Temperature indication "about 20 ° C" is understood here that it is the ambient temperature of the tool.
Weiter kann vorgesehen sein, dass die erste Abkühlzeit zur Ausbildung des gehärteten Werkstückabschnitts, und dass die Summe aus erster Abkühlzeit und zweiter Abkühlzeit zur Ausbildung des duktilen Werkstückabschnitts vorgesehen ist. Die Abkühlzeit des zweiten Werkstückabschnitts ist damit noch weiter erhöht, und es wird die Lagerungsphase des aus der Vorrichtung entnommenen Werkstücks zur vollständigen Abkühlung genutzt.It can further be provided that the first cooling time for forming the hardened workpiece section, and that the sum of the first cooling time and the second cooling time for forming the ductile workpiece section is provided. The cooling time of the second workpiece section is thus further increased, and the storage phase of the workpiece removed from the device is used for complete cooling.
Die Erfindung wird nun anhand von Ausführungsbeispielen näher erläutert. Es zeigen
- Fig. 1
- eine erfindungsgemäße Warmumformvorrichtung in einer schematischen Schnittdarstellung;
- Fig. 2
- ein erstes Ausführungsbeispiel einer erfindungsgemäßen Warmumformvorrichtung in einer schematischen Draufsicht;
- Fig. 3
- ein schematisches Temperatur-Zeitdiagramm des Prozessschritts "Presshärten";
- Fig. 4a
- ein zweites Ausführungsbeispiel einer erfindungsgemäßen Warmumformvorrichtung in einer schematischen Draufsicht;
- Fig. 4b
- die Warmumformvorrichtung in
Fig. 4a am Ende des Prozessschritts "Presshärten"; - Fig. 5a
- ein drittes Ausführungsbeispiel einer erfindungsgemäßen Warmumformvorrichtung in einer schematischen Draufsicht;
- Fig. 5b
- die Warmumformvorrichtung in
Fig. 5a am Ende des Prozessschritts "Presshärten"; - Fig. 6
- ein Blockschaltbild der Warmumformvorrichtung.
- Fig. 1
- a hot forming device according to the invention in a schematic sectional view;
- Fig. 2
- a first embodiment of a hot forming device according to the invention in a schematic plan view;
- Fig. 3
- a schematic temperature-time diagram of the process step "press hardening";
- Fig. 4a
- A second embodiment of a hot forming device according to the invention in a schematic plan view;
- Fig. 4b
- the hot forming device in
Fig. 4a at the end of the process step "press hardening"; - Fig. 5a
- A third embodiment of a hot forming device according to the invention in a schematic plan view;
- Fig. 5b
- the hot forming device in
Fig. 5a at the end of the process step "press hardening"; - Fig. 6
- a block diagram of the hot forming device.
Das Werkstück wird zum Warmumformen im Hinblick auf nachfolgendes Presshärten auf eine Temperatur oberhalb der Austenitisierungstemperatur erwärmt und zwischen einem Werkzeugoberteil und einem Werkzeugunterteil eines Umform- und/oder Press-Werkzeugs fixiert und einem Pressdruck ausgesetzt. Das ist das Warmumformen. Danach wird das Werkstück im Werkzeug rasch unter die Austenitisierungstemperatur abgekühlt, das heißt abgeschreckt. Das ist das Presshärten, das auch als Formhärten bezeichnet wird, weil es in einer geschlossenen Werkzeugform stattfindet.The workpiece is heated to a temperature above the Austenitisierungstemperatur for hot forming with respect to subsequent press hardening and fixed between a tool upper part and a lower tool part of a forming and / or pressing tool and subjected to a pressing pressure. That's the hot forming. Thereafter, the workpiece in the tool is rapidly cooled below the austenitizing temperature, that is quenched. This is press hardening, which is also known as tempering because it takes place in a closed mold.
Es kann auch vorgesehen sein, in dem Werkstück außer gehärteten Abschnitten duktile Abschnitte auszubilden. Duktile Abschnitte müssen deutlich langsamer als beim Presshärten vorgesehen, abgekühlt werden, so dass keine Martensitumwandlung erfolgt.It may also be provided to form ductile sections in the workpiece except for hardened sections. Ductile sections must be cooled considerably slower than during press hardening, so that no martensitic transformation takes place.
Die Warmumformvorrichtung 1 weist ein rahmenförmiges Gestell 11 auf, in dem eine erste Umformstation 2 mit einem ersten Werkzeug 3 und eine zweite Umformstation 2' mit einem zweiten Werkzeug 3', das mit der Formkontur des ersten Werkzeugs 3 ausgebildet ist, angeordnet sind. Zwischen einem Werkzeugoberteil 31 und einem Werkzeugunterteil 32 ist das Werkstück 4 anordenbar. In dem in
Die Werkzeuge 3 und 3' und somit die Werkzeugoberteile 31 und Werkzeugunterteile 32 weisen einen ersten Werkzeugabschnitt 33, der zum Ausbilden des gehärteten Werkstückabschnitts vorgesehen ist, und einen zweiten Werkzeugabschnitt 34, der zum Ausbilden des duktilen Werkstückabschnitts vorgesehen ist, auf (siehe
Die Werkzeuge 3 und 3' weisen weiter Einrichtungen zur Regulierung der Temperatur der ersten und zweiten Werkzeugabschnitte 33, 34 auf, wie weiter unten in
Ergänzend zu den Kühlkreisläufen können Heizeinrichtungen vorgesehen sein, um falls erforderlich, kalte Werkzeuge auf eine über der Umgebungstemperatur liegende Temperatur vorzuwärmen. Beispielsweise wird das erste Werkzeug 3 im zweiten Werkzeugabschnitt 34 auf 300 bis 400 °C temperiert.In addition to the cooling circuits, heating means may be provided to preheat, if necessary, cold tools to a temperature above ambient temperature. For example, the
Das Werkstück 4 durchläuft nacheinander eine Erwärmungsstation 8, die erste Umformstation 2 und die zweite Umformstation 2'.The
Zwischen den beiden benachbarten Umformstationen 2 und 2' ist ein Industrieroboter 5 angeordnet, der das in der ersten Umformstation 2 bearbeitete Werkstück 4 der ersten Umformstation 2 entnimmt und in der zweiten Umformstation 2' zur weiteren Bearbeitung ablegt.Between the two adjacent forming
Weitere Industrieroboter 5 sind zwischen einer Lagerstation 6 für unbearbeitete Werkstücke und der Erwärmungsstation 8, der Erwärmungsstation 8 und der ersten Umformstation 2, sowie der zweiten Umformstation 2' und einer Lagerstation 7 für bearbeitete Werkstücke angeordnet.Further
In einem ersten Verfahrensschritt wird ein Werkstück 4 einem auf der Lagerstation 6 für unbearbeitete Werkstücke ausgebildeten Werkstückstapel entnommen und in der Erwärmungsstation 8 abgelegt.In a first method step, a
In einem zweiten Verfahrensschritt wird das in der Erwärmungsstation 8 abgelegte Werkstück 4 auf eine Temperatur oberhalb der Austenitisierungstemperatur seines Stahlwerkstoffs erwärmt.In a second method step, the
In einem dritten Verfahrensschritt wird das erwärmte Werkstück 4 der Erwärmungsstation 8 entnommen und in dem geöffneten Werkzeug 3 der ersten Umformstation 2 abgelegt.In a third method step, the
In einem vierten Verfahrensschritt wird das Werkzeug 3 der Umformstation 2 geschlossen und das erwärmte Werkstück 4 warm umgeformt.In a fourth method step, the
In einem fünften Verfahrensschritt wird das umgeformte Werkstück 4 bei geschlossenem Werkzeug 3 teilweise pressgehärtet. Das Werkstück 4 weist in dem zu härtenden Werkstückabschnitt zur Zeit t1 eine Temperatur T11 auf und in dem duktil auszubildenden Werkstückabschnitt eine Temperatur T21 auf. Die Temperaturen T11 und T21 sind gleich und entsprechen der Temperatur des Werkstücks 4 nach dem Umformen, bei dem eine geringe Abkühlung des Werkstücks 4 eintreten kann. Beispielsweise ist T11 = T21 = ca. 500 °C. Das ist die Temperatur eines Werkstücks nach dem Warmumformen, das vor dem Warmumformen auf ca. 950 °C erwärmt wurde und beim Einlegen des Werkstücks in das Werkzeug noch eine Temperatur von ca. 700 °C aufwies. Das Werkstück 4 wird nun in einem ersten Zeitabschnitt
Beispielsweise ist die Dauer des Zeitabschnitts Δt1 ca. 10s, wobei zur Zeit t2 die Temperatur T12 des Werkstücks 4 in dem zu härtenden Werkstückabschnitt im Bereich von 60 bis 150 °C und die Temperatur T22 des Werkstücks 4 in dem duktil auszubildenden Werkstückabschnitt im Bereich von 400 bis 500 °C ist.For example, the duration of the time interval .DELTA.t 1 is about 10 s, wherein at time t 2, the temperature T 12 of the
In einem sechsten Verfahrensschritt wird das erste Werkzeug 3 geöffnet und das teilgehärtete Werkstück 4 wird durch den Industrieroboter 5 entnommen und in dem geöffneten zweiten Werkzeug 3' abgelegt. In dem in
In einem siebenten Verfahrensschritt wird das teilgehärtete Werkstück 4 bei geschlossenem Werkzeug 3' fertig gehärtet. Das Werkstück 4 weist in dem zu härtenden Werkstückabschnitt zur Zeit t3 die Temperatur T12 auf und in dem duktil auszubildenden Werkstückabschnitt die Temperatur T22 auf. Beide Werkstückabschnitte werden nun in einem dritten Zeitabschnitt
Beispielsweise ist die Dauer des Zeitabschnitts Δt2 ca. 10s, wobei zur Zeit t4 die Temperatur T12 des Werkstücks 4 in dem zu härtenden Werkstückabschnitt sowie in dem duktil auszubildenden Werkstückabschnitt etwa die Umgebungstemperatur ist.For example, the duration of the time interval .DELTA.t 2 is about 10 s, wherein at time t 4, the temperature T 12 of the
In einem siebenten Verfahrensschritt wird das zweite Werkzeug 3' geöffnet und das fertig gehärtete Werkstück 4 wird durch den Industrieroboter 5 entnommen und in der Lagerstation 7 für bearbeitete Werkstücke abgelegt.In a seventh method step, the second tool 3 'is opened and the finished
Durch die Verteilung des Verfahrensschritts Presshärten auf zwei Umformstationen ist gegenüber nur einer Umformstation ein erhöhter Durchsatz an Werkstücken möglich, weil nun die Taktzeiten der einzelnen Stationen im Idealfall angeglichen sind. Der für die langsame Abkühlung des duktilen Werkstückabschnitts zur Verfügung stehende Zeitabschnitt ist die Summe
Die
Die
Die Umformstationen 2 und 2' können zusätzliche Vorrichtungen zur Bearbeitung der Werkstücke 4 umfassen, beispielsweise Vorrichtungen zum Lochen und Beschneiden. Vorzugsweise sind diese Vorrichtungen in den zweiten Werkzeugabschnitten 34 angeordnet, in denen das Werkstück 4 duktil ausgebildet wird und/oder in dem ersten Werkzeugabschnitt 33 des ersten Werkzeugs 3, so dass kein erhöhter Verschleiß infolge hoher Härte eintritt.The forming
Zur Steuerung der Warmumformvorrichtung 1 ist eine Steuerungseinrichtung 9 vorgesehen. Die Steuerungseinrichtung 9 weist Eingänge auf, die mit Temperatursensoren 9s verbunden sind, wobei die Temperatursensoren 9s an den ersten und zweiten Werkzeugabschnitten 33, 34 des ersten Werkzeugs 3 und des zweiten Werkzeugs 3' angeordnet sind. Die Steuerungseinrichtung 9 weist Ausgänge auf, die mit Steuerungseingängen von Temperierungseinrichtungen 10 verbunden sind, die beispielsweise als Kühlkreisläufe mit Wärmetauscher und Kompressorpumpe ausgebildet sein können, wobei wie in
Mindestens ein weiterer Ausgang der Steuerungseinrichtung 9 ist mit dem zwischen den beiden Umformstationen 2 und 2' angeordneten Roboter 5 verbunden, der die Werkstücke 4 von der ersten Umformstation 2 in die zweite Umformstation 2' transportiert.At least one further output of the
Vorteilhafterweise kann die Steuerungseinrichtung 9 weitere Eingänge und Ausgänge besitzen, um die in
- 11
- WarmumformvorrichtungWarmumformvorrichtung
- 22
- erste Umformstationfirst forming station
- 2'2 '
- zweite Umformstationsecond forming station
- 33
- erstes Werkzeugfirst tool
- 3a3a
- Ausgleichselementcompensation element
- 3d3d
- Dehnungsfugeexpansion
- 3'3 '
- zweites Werkzeugsecond tool
- 44
- Werkstückworkpiece
- 55
- Industrieroboterindustrial robots
- 66
- Lagerstation für unbearbeitete WerkstückeStorage station for unprocessed workpieces
- 77
- Lagerstation für bearbeitete WerkstückeStorage station for machined workpieces
- 88th
- Erwärmungsstationheating station
- 99
- Steuerungseinrichtungcontrol device
- 9s9s
- Temperatursensortemperature sensor
- 1010
- Temperierungseinrichtungtempering
- 1111
- Gestellframe
- 1212
- Kopfplatteheadstock
- 1313
- Antrieb der KopfplatteDrive the top plate
- 1414
- Grundplattebaseplate
- 3131
- WerkzeugoberteilUpper die
- 3232
- WerkzeugunterteilTool part
- 3333
- erster Werkzeugabschnittfirst tool section
- 3434
- zweiter Werkzeugabschnittsecond tool section
- 3535
- Kühlkanalcooling channel
Claims (13)
- Hot forming device (1) for hot forming and/or press hardening of workpieces (4), preferably made from sheet steel, which have a hardened workpiece section and a ductile workpiece section after press hardening, wherein it is provided that
the hot forming device (1) comprises a first forming station (2) having a first tool (3) and a second forming station (2') arranged behind the first forming station (2) having a second tool (3'), wherein the second tool (3') is formed having the shape contour of the first tool (3) ;
at least the first tool (3) has a first tool section (33) which is provided for forming the hardened workpiece section, and a second tool section (34) which is provided for forming the ductile workpiece section; and
the tools (3, 3') comprise temperature control devices (10) for adjusting the temperatures,
characterised in that
a control device (9) is provided for controlling the hot forming device (1), wherein the control device (9) has inputs which are connected to temperature sensors (9s) which are arranged on the tool sections (33, 34) of the tools (3, 3'), and outputs which are connected to temperature control devices (10) which interact with the tool sections (33, 34) of the tools (3, 3'). - Hot forming device according to claim 1,
characterised in that
the target temperature of the first tool (3) is approx. 20°C in the first tool section (33) and 300 to 400°C in the second tool section (34). - Hot forming device according to claim 1 or 2,
characterised in that
the first and the second tool section (33, 34) of the first tool (3) are formed in one piece. - Hot forming device according to claim 1 or 2,
characterised in that
the first and the second tool sections (33, 34) of the first tool (3) are separated by an expansion joint (3d). - Hot forming device according to claim 4,
characterised in that
a compensation element (3a) is arranged between the first and the second tool section (33, 34) of the first tool (3), said compensation element being separated from the first and the second tool section (33, 34) by expansion joints (3d). - Hot forming device according to one of the preceding claims,
characterised in that
the second tool (3') has a first tool section (33) which is provided for forming the hardened workpiece section, and a second tool section (34) which is provided for forming the ductile workpiece section. - Hot forming device according to claim 6,
characterised in that
the target temperature of the second tool (3') is approx. 20°C in the first tool section (33) and 20 to 200°C in the second tool section (34). - Hot forming device according to one of the preceding claims,
characterised in that
an industrial robot (5) is arranged between the first forming station (2) and the second forming station (2'), said industrial robot (5) being formed such that it removes a processed workpiece (4) from the first forming station (2) and deposits it in the second forming station (2') for further processing. - Hot forming device according to one of the preceding claims,
characterised in that
the tempering device (10) comprises a cooling circuit having cooling channels (35) arranged in the tool sections (33, 34) of the tools (3, 3'), a heat exchanger and a coolant compressor. - Method for hot forming and/or press hardening workpieces (4), preferably made from sheet steel, comprising the process steps of hot forming and/or press hardening, wherein the workpieces (4) have a hardened workpiece section and a ductile workpiece section after the press hardening,
wherein it is provided that
the process step of press hardening is implemented in two consecutive partial steps, wherein a first partial step is implemented with a first cooling time Δt1 in a first tool (3) having a first tool section (33) which is provided for forming the hardened workpiece section, and a second tool section (34) which is provided for forming the ductile workpiece section, and a second partial step is implemented with a second cooling time Δt3 in a second tool (3'),
characterised in that
a control device (9) is used for controlling the hot forming device (1), wherein the control device (9) has inputs which are connected to temperature sensors (9s) which are arranged on the tool sections (33, 34) of the tools (3, 3'), and outputs which are connected to temperature control devices (10) which interact with the tool sections (33, 34) of the tools (3, 3'). - Method according to claim 10,
characterised in that
the target temperature of the first tool (3) is adjusted to approx. 20°C in the first tool section (33) and in the range from 300 to 400°C in the second tool section (34). - Method according to claim 10,
characterised in that
the target temperature of the second tool (3') is adjusted to approx. 20°C in a first tool section (33) which is provided for forming the hardened workpiece section and in the range from approx. 20 to 200°C in a second tool section (34) which is provided for forming the ductile workpiece section. - Method according to one of claims 10 to 12,
characterised in that
the first cooling time Δt1 is provided for forming the hardened workpiece section; and
the sum of the first cooling time Δt1 and the second cooling time Δt3 is provided for forming the ductile workpiece section.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012112334.9A DE102012112334A1 (en) | 2012-12-14 | 2012-12-14 | Warmumformvorrichtung |
PCT/EP2013/076608 WO2014091014A1 (en) | 2012-12-14 | 2013-12-13 | Hot forming device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2931453A1 EP2931453A1 (en) | 2015-10-21 |
EP2931453B1 true EP2931453B1 (en) | 2016-11-02 |
Family
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13811422.8A Active EP2931453B1 (en) | 2012-12-14 | 2013-12-13 | Hot forming method and device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2931453B1 (en) |
DE (1) | DE102012112334A1 (en) |
WO (1) | WO2014091014A1 (en) |
Cited By (1)
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DE102021110702A1 (en) | 2021-04-27 | 2022-10-27 | Voestalpine Metal Forming Gmbh | Process and device for manufacturing hardened steel components with different ductile areas |
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EP2957361A1 (en) * | 2014-06-16 | 2015-12-23 | Autotech Engineering, A.I.E. | Hot forming die quenching |
DE102014109883B4 (en) | 2014-07-15 | 2023-05-04 | Manuela Braun | Forming device for forming and subsequent press-hardening of a sheet metal blank or a preformed semi-finished product made of steel and steel workpiece produced therewith |
DE102014119545A1 (en) | 2014-12-23 | 2016-06-23 | Benteler Automobiltechnik Gmbh | Spring-mounted segmented hot-forming tool and method for producing a hot-formed and press-hardened steel component with a sharply bordered transition region |
DE102015101668A1 (en) * | 2015-02-05 | 2016-08-11 | Benteler Automobiltechnik Gmbh | Double falling heating and forming tool and method for producing thermoformed and press-hardened motor vehicle components |
DE102015001408A1 (en) * | 2015-02-06 | 2016-08-11 | Eisenmann Se | Plant for the form hardening of workpieces |
DE102015016532A1 (en) * | 2015-12-18 | 2017-06-22 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Tool assembly for integration in a production line for producing a hot forming component from a circuit board, production line with the tool assembly and method for manufacturing the hot forming component from the board with the production line |
JP6548620B2 (en) * | 2016-09-06 | 2019-07-24 | 日本製鉄株式会社 | Hot press machine |
CN106893806B (en) * | 2017-04-25 | 2018-06-05 | 金华辉煌三联工具实业有限公司 | A kind of guide plate Full-automatic high frequency quenches work station |
CN110340225B (en) * | 2019-07-04 | 2020-09-25 | 浙江苒晟信息科技有限公司 | Stamping device is used in production of pipe fitting mould |
CN110883164B (en) * | 2019-11-28 | 2021-11-16 | 山东恒信科技服务有限公司 | Quick compression fittings is used in aluminum alloy furniture production and processing |
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DE19854057A1 (en) * | 1998-11-24 | 2000-05-25 | Innova Engineering Gmbh | Device for injection molding plastic molded parts and method for producing such a device |
DE102007047314B4 (en) | 2007-10-02 | 2015-12-31 | Hfs Hotforming Solutions Gmbh | Pressing tool for hot forming or / and press hardening of workpieces made of sheet metal |
DE102008030279A1 (en) * | 2008-06-30 | 2010-01-07 | Benteler Automobiltechnik Gmbh | Partial thermoforming and curing by means of infrared lamp heating |
DE102008034596A1 (en) * | 2008-07-25 | 2010-02-04 | Bayerische Motoren Werke Aktiengesellschaft | Hardened sheet steel component producing method, involves heating sheet steel, and locally adjusting cooling process of sheet steel by selectively intervening heat transmission from sheet steel to molding tools |
DE102009014670B4 (en) * | 2009-03-27 | 2011-01-13 | Thyssenkrupp Sofedit S.A.S | Method and hot forming plant for the production of press-hardened shaped components from sheet steel |
DE102009018798A1 (en) * | 2009-04-24 | 2009-10-29 | Daimler Ag | Workpiece i.e. metal sheet, hot-forming device, has two tool halves fastened to clamping plate and manufactured from two different metallic materials, where one of tool halves comprises areas with different heat conducting characteristics |
DE102010004081C5 (en) * | 2010-01-06 | 2016-11-03 | Benteler Automobiltechnik Gmbh | Method for thermoforming and curing a circuit board |
JP2011179028A (en) * | 2010-02-26 | 2011-09-15 | Sumitomo Metal Ind Ltd | Method for producing formed article |
DE102010049205B4 (en) * | 2010-10-13 | 2012-04-26 | Elisabeth Braun | Hot forming line and method for hot forming sheet metal |
KR101253838B1 (en) * | 2010-12-27 | 2013-04-12 | 주식회사 포스코 | Method for Manufacturing a Multi Physical Property Part |
DE102011102167A1 (en) * | 2011-05-21 | 2012-11-22 | Volkswagen Aktiengesellschaft | Producing molded component with two structural regions of different ductility which are made of flat or preformed circuit board of hardenable steel, comprises heating circuit board in first region, shaping circuit board and partially curing |
-
2012
- 2012-12-14 DE DE102012112334.9A patent/DE102012112334A1/en not_active Ceased
-
2013
- 2013-12-13 EP EP13811422.8A patent/EP2931453B1/en active Active
- 2013-12-13 WO PCT/EP2013/076608 patent/WO2014091014A1/en active Application Filing
Cited By (1)
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DE102021110702A1 (en) | 2021-04-27 | 2022-10-27 | Voestalpine Metal Forming Gmbh | Process and device for manufacturing hardened steel components with different ductile areas |
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EP2931453A1 (en) | 2015-10-21 |
WO2014091014A1 (en) | 2014-06-19 |
DE102012112334A1 (en) | 2014-06-18 |
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