DE102007062233A1 - Hardened tubular hollow workpiece producing method, involves expanding workpiece by introducing fluid medium in finished forging, and quenching workpiece in forming tool during expansion by fluid medium - Google Patents
Hardened tubular hollow workpiece producing method, involves expanding workpiece by introducing fluid medium in finished forging, and quenching workpiece in forming tool during expansion by fluid medium Download PDFInfo
- Publication number
- DE102007062233A1 DE102007062233A1 DE200710062233 DE102007062233A DE102007062233A1 DE 102007062233 A1 DE102007062233 A1 DE 102007062233A1 DE 200710062233 DE200710062233 DE 200710062233 DE 102007062233 A DE102007062233 A DE 102007062233A DE 102007062233 A1 DE102007062233 A1 DE 102007062233A1
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- DE
- Germany
- Prior art keywords
- workpiece
- forming tool
- fluid medium
- pressure medium
- tubular hollow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
-
- 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
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/10—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
- C21D7/12—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars by expanding tubular bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Fluid Mechanics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung eines hohlen Werkstücks gemäß dem Oberbegriff des Patentanspruches 1.The The invention relates to a method for producing a hollow workpiece according to the preamble of claim 1.
Ein
gattungsgemäßes Verfahren ist aus der
Der Erfindung liegt die Aufgabe zugrunde, ein gattungsgemäßes Verfahren dahingehend weiterzubilden, dass eine relativ schnelle Herstellung eines gehärteten hohlen Werkstückes erreicht wird.Of the Invention is based on the object, a generic To develop a method that a relatively fast Production of a hardened hollow workpiece is reached.
Die Aufgabe ist erfindungsgemäß durch die Merkmale des Patentanspruches 1 gelöst.The Task is according to the invention by the features of claim 1.
Dank der Erfindung wird das hoch erhitzte Werkstück bereits während des Aufweitens im Umformwerkzeug abgeschreckt. Durch die Zusammenlegung der Verfahrensschritte wird erheblich Zeit für die Herstellung eingespart, wobei trotzdem die gewünschte Form des Werkstücks erzielt und eine ausreichende Härtung erreicht werden. Im Falle der Verwendung eines Stahlwerkstoffes für das Werkstück wird bei Drücken von mindestens 800 bar bis 3000 bar, je nach Stahlsorte und Wanddicke des Werkstückes umgeformt und das Werkstück dabei in seine gewünschte pressgehärtete Endform aufgeweitet. Aufgrund der Abschreckung beim Aufweiten entfällt die Heizvorrichtung des Umformwerkzeugs vollkommen, so dass die Herstellungsvorrichtung und der damit verbundene apparative Aufwand zur Herstellung des Werkstücks enorm herabgesetzt werden. Denkbar ist einerseits, das Werkstück gleich mit Beginn des Aufweitvorgangs abzuschrecken, was die Herstellung beschleunigt. Andererseits kann auch die Abschreckung ein wenig zeitversetzt einsetzen, wodurch die durch die Erhitzung erlangte Fließfähigkeit des Werkstückmaterials eine besonders gute Ausformung mit hohen Umformgraden zulässt.thanks the invention, the highly heated workpiece already quenched during expansion in the forming tool. By merging the process steps is considerable time Saved for the production, while still the desired Form of the workpiece achieved and sufficient hardening be achieved. In case of using a steel material for the workpiece is pressed by pressing at least 800 bar to 3000 bar, depending on steel grade and wall thickness formed of the workpiece and the workpiece thereby expanded into its desired press-hardened final shape. by virtue of the deterrent during expansion eliminates the heater of the forming tool completely, so that the manufacturing device and the associated apparatus required for the production of the Workpiece be reduced enormously. On the one hand, it is conceivable to quench the workpiece at the start of the expansion process, which speeds up the production. On the other hand, the deterrent use a little time-shifting, which by heating attained fluidity of the workpiece material a particularly good shape with high degrees of deformation allows.
In einer vorteilhaften Weiterbildung des erfindungsgemäßen Verfahrens nach Anspruch 2 wird das Umformwerkzeug zumindest vom Einbringen des Werkstücks an bis zur Entnahme des fertig geformten Werkstücks gekühlt. Durch diese Maßnahme wird der Herstellungsprozess noch weiter beschleunigt, da das Abschrecken bereits mit dem Schließen des Umformwerkzeugs einsetzt. Die Kühlung besteht vorzugsweise in einer Wasserkühlung, mit der die Außenseite des Werkzeugs in einfacher Weise beaufschlagt wird. Etwas aufwändiger ist die Kühlung der Gravur, die den Formraum für das Werkstück bildet. Hier sind mehrere Kanäle vorzusehen, die mit Kühlflüssigkeit geflutet werden.In an advantageous development of the invention The method according to claim 2, the forming tool is at least from Insert the workpiece until ready to be removed cooled cooled workpiece. This measure will the manufacturing process is even further accelerated as quenching already begins with the closing of the forming tool. The cooling is preferably in a water cooling, with the outside of the tool in a simple manner is charged. Somewhat more complex is the cooling of the Engraving, which forms the cavity for the workpiece. Here are several channels to provide with coolant be flooded.
In einer weiteren besonders bevorzugten Weiterbildung der Erfindung nach Anspruch 3 wird das Werkstück mittels des Druckmediums gleichzeitig aufgeweitet und abgeschreckt. Hierdurch wird das Werkstück von innen zum Abschrecken erfasst, wobei das Druckmedium in Abhängigkeit von der thermischen Wechselbelastbarkeit des Werkstückmaterials sowie der Wandstärke gekühlt sein oder Raumtemperatur besitzen kann. Auch ist denkbar, dass das Druckmedium leicht erwärmt ist, jedoch so, dass im Vergleich zu dem aus der Ofenhitze kommenden Werkstück die Temperatur immer noch so niedrig ist, dass ein Abschreckungseffekt eintritt. Die Abschreckung durch das Druckmedium kann ausschließlich nur von diesem oder zusätzlich durch die Kühlung des Umformwerkzeugs ausgeführt werden.In a further particularly preferred embodiment of the invention According to claim 3, the workpiece by means of the pressure medium simultaneously widened and quenched. This will cause the workpiece detected from the inside for quenching, the pressure medium depending on from the thermal capacity of the workpiece material as well as the wall thickness be cooled or room temperature can own. It is also conceivable that the print medium heats up slightly is, however, so that in comparison to the coming of the furnace heat workpiece the temperature is still so low that a deterrent effect entry. The quenching by the pressure medium can only be from this or additionally by the cooling of the Forming tool to be executed.
In einer weiteren bevorzugten Ausgestaltung der Erfindung nach Anspruch 4 wird als Druckmedium Wasser oder eine Wasseremulsion verwandt. Dadurch, dass Wasser bzw. die Wasseremulsion ein inkompressibles Druckmedium ist, können prozesssicher sehr hohe Drücke erzeugt werden, was zu einer besonders hohen Anpressung des Werkstückmaterials an der Werkzeuggravur führt, die in Verbindung mit dem Abschreckvorgang das damit einhergehende Presshärten des Werkstücks entscheidend verbessert. Hierbei können sehr hohe Festigkeitswerte des Werkstücks im Bereich von 1500 N/mm2 und darüber eingestellt werden. Somit erhält das unter Hochdruck stehende Druckmedium Wasser eine Doppelfunktion, die des Aufweitens zur Ausformung des Werkstücks und die der Pressung für das Presshärten. Aufgrund des hohen Temperaturgradienten und damit des hohen Wärmeübergangs zwischen Werkstück und Druckmedium dehnt sich letzteres aus, wodurch noch höhere Drücke für die Pressung erzeugt werden können. Die erzeugte Endform des Werkstücks, also das Hohlprofil ist durch das erfindungsgemäße Verfahren praktisch fertigungstechnisch toleranzfrei und weist eine hochpräzise exakt reproduzierbare Kontur auf.In a further preferred embodiment of the invention according to claim 4, water or a water emulsion is used as the pressure medium. Due to the fact that water or the water emulsion is an incompressible pressure medium, very high pressures can be reliably generated, which leads to a particularly high contact pressure of the workpiece material on the tool engraving, which decisively improves the associated press hardening of the workpiece in connection with the quenching process. In this case, very high strength values of the workpiece in the range of 1500 N / mm 2 and above can be set. Thus, the pressurized water under pressure receives a dual function of water, the expansion of the molding of the workpiece and the pressure for press hardening. Due to the high temperature gradient and thus the high heat transfer between the workpiece and the pressure medium, the latter expands, whereby even higher pressures for the pressure can be generated. The final shape of the workpiece produced, that is, the hollow profile is practically free of tolerances by the method according to the invention and has a high-precision, exactly reproducible contour.
In einer bevorzugten Weiterbildung der Erfindung nach Anspruch 5 wird das sich im Ausgangszustand befindende Werkstück auf eine Temperatur im Bereich von 850°C bis 950°C erhitzt. Dieser Bereich hat sich nach vielfältigen Untersuchungen als am vorteilhaftesten für eine hohe Festigkeit bei gleichzeitiger bestmöglicher Ausformung des Werkstücks herausgestellt.In a preferred embodiment of the invention according to claim 5, the workpiece in the initial state is heated to a temperature in the range of 850 ° C to 950 ° C. This area has been found after a variety of studies as the most advantageous for high strength at the same time the best possible shape of the workpiece.
In einer weiteren bevorzugten Weiterbildung der Erfindung nach Anspruch 6 wird als Werkstück ein rohrförmiges Hohlprofil verwandt. In das Hohlprofil ist das Druckmedium leicht einzuleiten, wobei es ohne weiteres hochdruckdicht abgedichtet werden kann. Die Gestaltungsmöglich der Vorform des Hohlprofils bzw. des Ausgangszustandes des Werkstücks ist nahezu beliebig. Das Hohlprofil kann ein gezogenes Rohr, ein Strangpressprofil oder auch eine gerollte und dann längsnahtgeschweißte Platine sein. Das Hohlprofil kann weiterhin vorgebogen oder/und mit unterschiedlichen Querschnitten profiliert sein. Des Weiteren kann es auch einen Befestigungsflansch besitzen. Das pressgehärtete Hohlprofil ist für viele Zwecke einsetzbar, beispielhaft als Träger oder Rahmenteil im Rohbau eines Kraftfahrzeugs oder als Überrollbügel. Die Hohlprofile können auch in Form von tailored tubes ausgebildet sein.In a further preferred embodiment of the invention according to claim 6 is a workpiece as a tubular hollow profile related. In the hollow profile, the print medium is easy to initiate, where it can be easily sealed high pressure tight. The Gestaltungsmöglich the preform of the hollow profile or the Initial state of the workpiece is almost arbitrary. The Hollow profile can be a drawn tube, an extruded profile or else a rolled and then longitudinally welded board be. The hollow profile can further pre-bent and / or with different Be profiled cross sections. Furthermore, it can also have a mounting flange. The press-hardened hollow profile is for many purposes can be used, for example as a carrier or frame part in Shell of a motor vehicle or as a roll bar. The hollow sections can also be in the form of tailored tubes be educated.
In einer hierzu alternativen Weiterbildung der Erfindung nach Anspruch 7 dienen als Werkstück zwei aufeinander gelegte Bleche, die im Umformwerkzeug gemeinsam eingespannt werden und zwischen die das Druckmedium zur Bildung des hohlen Werkstücks eingeleitet wird. Hierdurch sind Hohlprofile erzeugbar, die einen Längsflansch für eine spätere Weiterverbauung des Hohlprofils besitzen. Gegebenenfalls kann es im Einspannbereich der Bleche aufgrund der hohen Hitze und der Einspannkraft zu Verschweißungen der Bleche kommen, wodurch eine zusätzlich betriebene Verschweißung des fertig geformten und gehärteten Hohlprofils entfallen kann. Weiterhin ist es denkbar, dass im Falle eines Unterbleibens der Verschweißung das erzeugte Hohlprofil in einfacher Weise in zwei gegebenenfalls formgleiche Halbschalen getrennt werden kann, in dem das Oberteil des Hohlprofils vom Unterteil abgehoben wird. Somit wird eine verfahrensökonomische Herstellung von Gleichteilen erreicht. Die Bleche können in Form von tailored blanks ausgebildet sein.In an alternative embodiment of the invention according to claim 7 serve as a workpiece two stacked sheets, which are clamped together in the forming tool and between which introduced the pressure medium to form the hollow workpiece becomes. As a result, hollow profiles can be produced, which have a longitudinal flange for a subsequent further development of the hollow profile have. Optionally, it may be in the clamping area of the sheets due the high heat and the clamping force to welds the sheets come, creating an additional operated welding eliminated the finished molded and hardened hollow profile can. Furthermore, it is conceivable that in case of failure the welding the hollow profile produced in a simple Way in two optionally identical half-shells are separated can, in which the upper part of the hollow profile is lifted from the lower part. Thus, a procedural economic production of identical parts reached. The sheets can be in the form of tailored blanks be educated.
Nachfolgend ist die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert.following the invention is closer with reference to an embodiment shown in the drawing explained.
Dabei
zeigt die
In
Da
Hohlprofil
Zur
Herstellung des hohlen Werkstücks, hier des rohrförmigen
Hohlprofils
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 69803588 T2 [0002] - DE 69803588 T2 [0002]
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE200710062233 DE102007062233A1 (en) | 2007-12-21 | 2007-12-21 | Hardened tubular hollow workpiece producing method, involves expanding workpiece by introducing fluid medium in finished forging, and quenching workpiece in forming tool during expansion by fluid medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710062233 DE102007062233A1 (en) | 2007-12-21 | 2007-12-21 | Hardened tubular hollow workpiece producing method, involves expanding workpiece by introducing fluid medium in finished forging, and quenching workpiece in forming tool during expansion by fluid medium |
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DE102007062233A1 true DE102007062233A1 (en) | 2009-06-25 |
Family
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DE200710062233 Withdrawn DE102007062233A1 (en) | 2007-12-21 | 2007-12-21 | Hardened tubular hollow workpiece producing method, involves expanding workpiece by introducing fluid medium in finished forging, and quenching workpiece in forming tool during expansion by fluid medium |
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011070063A1 (en) * | 2009-12-11 | 2011-06-16 | Robert Bosch Gmbh | Device for autofrettage |
DE102011051965A1 (en) * | 2011-07-20 | 2013-01-24 | Benteler Automobiltechnik Gmbh | Method for producing a tubular structural component for a motor vehicle and structural component |
DE102013002775A1 (en) | 2013-02-16 | 2014-03-13 | Daimler Ag | Deforming tool e.g. transfer tool, for use in transfer press for deforming axle carriers of motor vehicle, has eddy current probe arranged in measuring head of tool, and executing crack test of axle carriers arranged in tool |
DE102013008609A1 (en) * | 2013-05-22 | 2014-11-27 | Schuler Pressen Gmbh | Method for forming a metal circuit board and forming device for carrying out the method |
CN104438543A (en) * | 2014-12-08 | 2015-03-25 | 无锡朗贤汽车组件研发中心有限公司 | High-pressure gas bulging thermoforming segmental reinforcement die of boron steel pipe |
CN104525752A (en) * | 2014-12-08 | 2015-04-22 | 无锡朗贤汽车组件研发中心有限公司 | Thermal forming and water cooling process of uniform-section boron steel pipe |
CN104525675A (en) * | 2014-12-08 | 2015-04-22 | 无锡朗贤汽车组件研发中心有限公司 | Gas bulging hot formation process of boron steel tube |
CN104525676A (en) * | 2014-12-08 | 2015-04-22 | 无锡朗贤汽车组件研发中心有限公司 | Gas bulging hot formation segmentation strengthening process of boron steel tube |
CN105921584A (en) * | 2016-04-19 | 2016-09-07 | 南京航空航天大学 | Air pressure bulging method of ultrahigh-strength steel hollow component |
CN105935728A (en) * | 2015-03-06 | 2016-09-14 | 本特勒尔汽车技术有限公司 | Method for producing a hot-formed and quench-hardened motor vehicle component formed by internal high-pressure forming |
DE102017223374A1 (en) * | 2017-12-20 | 2019-06-27 | Bayerische Motoren Werke Aktiengesellschaft | Method for producing a profile component and profile component |
DE102019124674A1 (en) * | 2019-09-13 | 2021-03-18 | Bayerische Motoren Werke Aktiengesellschaft | Process for the production of a profile component as well as a profile component |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69803588T2 (en) | 1997-05-30 | 2002-06-06 | Accra Teknik Ab Oejebyn | METHOD FOR PRODUCING QUARCHED THIN-WALLED HOLLOW METAL HOUSINGS BY BLOW MOLDING |
-
2007
- 2007-12-21 DE DE200710062233 patent/DE102007062233A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69803588T2 (en) | 1997-05-30 | 2002-06-06 | Accra Teknik Ab Oejebyn | METHOD FOR PRODUCING QUARCHED THIN-WALLED HOLLOW METAL HOUSINGS BY BLOW MOLDING |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011070063A1 (en) * | 2009-12-11 | 2011-06-16 | Robert Bosch Gmbh | Device for autofrettage |
CN102652178A (en) * | 2009-12-11 | 2012-08-29 | 罗伯特·博世有限公司 | Device for autofrettage |
DE102011051965A1 (en) * | 2011-07-20 | 2013-01-24 | Benteler Automobiltechnik Gmbh | Method for producing a tubular structural component for a motor vehicle and structural component |
US9248490B2 (en) | 2011-07-20 | 2016-02-02 | Benteler Automobiltechnik Gmbh | Method of manufacturing a tubular structural part, and tubular structural part |
DE102013002775A1 (en) | 2013-02-16 | 2014-03-13 | Daimler Ag | Deforming tool e.g. transfer tool, for use in transfer press for deforming axle carriers of motor vehicle, has eddy current probe arranged in measuring head of tool, and executing crack test of axle carriers arranged in tool |
DE102013008609A1 (en) * | 2013-05-22 | 2014-11-27 | Schuler Pressen Gmbh | Method for forming a metal circuit board and forming device for carrying out the method |
CN104525676A (en) * | 2014-12-08 | 2015-04-22 | 无锡朗贤汽车组件研发中心有限公司 | Gas bulging hot formation segmentation strengthening process of boron steel tube |
CN104525675A (en) * | 2014-12-08 | 2015-04-22 | 无锡朗贤汽车组件研发中心有限公司 | Gas bulging hot formation process of boron steel tube |
CN104525752A (en) * | 2014-12-08 | 2015-04-22 | 无锡朗贤汽车组件研发中心有限公司 | Thermal forming and water cooling process of uniform-section boron steel pipe |
CN104438543A (en) * | 2014-12-08 | 2015-03-25 | 无锡朗贤汽车组件研发中心有限公司 | High-pressure gas bulging thermoforming segmental reinforcement die of boron steel pipe |
CN104525752B (en) * | 2014-12-08 | 2017-01-18 | 无锡朗贤汽车组件研发中心有限公司 | Thermal forming and water cooling process of uniform-section boron steel pipe |
CN104525675B (en) * | 2014-12-08 | 2017-03-22 | 无锡朗贤汽车组件研发中心有限公司 | Gas bulging hot formation process of boron steel tube |
CN105935728A (en) * | 2015-03-06 | 2016-09-14 | 本特勒尔汽车技术有限公司 | Method for producing a hot-formed and quench-hardened motor vehicle component formed by internal high-pressure forming |
CN105935728B (en) * | 2015-03-06 | 2019-06-07 | 本特勒尔汽车技术有限公司 | Automobile stand column and method for manufacturing automobile stand column |
CN105921584A (en) * | 2016-04-19 | 2016-09-07 | 南京航空航天大学 | Air pressure bulging method of ultrahigh-strength steel hollow component |
DE102017223374A1 (en) * | 2017-12-20 | 2019-06-27 | Bayerische Motoren Werke Aktiengesellschaft | Method for producing a profile component and profile component |
US11873537B2 (en) | 2017-12-20 | 2024-01-16 | Bayerische Motoren Werke Aktiengesellschaft | Method for producing a profiled component, and profiled component |
DE102019124674A1 (en) * | 2019-09-13 | 2021-03-18 | Bayerische Motoren Werke Aktiengesellschaft | Process for the production of a profile component as well as a profile component |
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