EP1954420B1 - Method and device for the coreless forming of hollow profiles - Google Patents
Method and device for the coreless forming of hollow profiles Download PDFInfo
- Publication number
- EP1954420B1 EP1954420B1 EP06819548A EP06819548A EP1954420B1 EP 1954420 B1 EP1954420 B1 EP 1954420B1 EP 06819548 A EP06819548 A EP 06819548A EP 06819548 A EP06819548 A EP 06819548A EP 1954420 B1 EP1954420 B1 EP 1954420B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- die
- halves
- production
- hollow section
- blank
- 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.)
- Ceased
Links
- 238000000034 method Methods 0.000 title claims description 49
- 238000004519 manufacturing process Methods 0.000 claims description 24
- 238000005452 bending Methods 0.000 claims description 17
- 238000003466 welding Methods 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims 2
- 230000002093 peripheral effect Effects 0.000 claims 2
- 238000005096 rolling process Methods 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0815—Making tubes with welded or soldered seams without continuous longitudinal movement of the sheet during the bending operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
-
- 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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
-
- 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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
- B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49805—Shaping by direct application of fluent pressure
Definitions
- the invention relates to a method for producing a hollow profile from a board, in which the board between two the desired profile shape and having relatively movable die halves is inserted and by a closing movement of the die halves the board is formed into a slotted hollow profile, wherein the deformation of the board is carried out with coreless die halves, as well as an apparatus for producing hollow profiles, which has two relatively mutually displaceable Gesenkformh crawln and optionally a base plate, wherein the Gesenkformh crawln have the desired profile shape of the hollow profile to be formed.
- a mold having splitting tool ie a tool with an inner mandrel or inner mandrel halves
- a mold having splitting tool ie a tool with an inner mandrel or inner mandrel halves
- the present invention thus has the object to provide a generic method and a generic device available, with which or with which low cost equipment with high process reliability hollow profiles can be made from a board, which are properly longitudinally welded, if necessary can.
- the above-described object of a generic method for producing a hollow profile is achieved in that the forming is carried out with coreless die halves and a Vorang rejoin the edges of the board during the closing movement of the die to form a slotted hollow profile is prevented whereby the board is set in the circumferential direction under pressure upon continuation of the closing movement of the die-half molds and applies with yielding to the mold halves.
- Suitable board materials are all easily deformable metals, in particular steel or a steel alloy.
- the board can freely deform in the interior of the die halves due to the omission of the mold gap, the risk of jamming of the board, for example due to surface defects of the die cores, eliminated and the process reliability for the production of the hollow profile significantly improved.
- a sword or other means for preventing the Voran concernss the edges of the board a precise slot in the hollow profile between the bent edges of the board generated, which allows a process-reliable longitudinal seam welding.
- At least one sword protruding into the coreless hollow space is used to prevent the edges of the board from advancing.
- the edges of the board slide along the inner die half surface until they strike the sword projecting into the coreless mold cavity.
- the sword then ensures, in the case of further closing of the tool, for the construction of the directed in the circumferential direction pressure within the board, which leads to the expansion of the circumference of the board and thus the exact application of the board to the inner mold cavity of the two die halves.
- the sword in a simple manner that the slot formed by the opposite edges of the board has a substantially constant width.
- the sword can, for example, extend over the entire longitudinal axis of the later hollow profile. But it is also possible to use a sword, which extends only in some areas in the mold cavity.
- a sword arranged between the die halves or in a die half is used. While the sword disposed between the die halves allows it to be easily removed after forming, a sword disposed in a die half opens up the use of die and bend presses without much rebuilding.
- the hollow profile is calibrated out during the closing process of the die halves, i. the pressure in the circumferential direction increased so much that a dimensionally accurate deformation of the board is caused in accordance with the mold cavity formed by the die halves. Subsequent processing to achieve the dimensional accuracy is so far no longer necessary in these hollow sections.
- the Auskalibrieren can, according to an embodiment of the method, also be performed without a sword. This exploits that the opposing edges of the board at the end of the forming process can be supported against each other, so as to build up pressure in the circumferential direction.
- the forming process can be initiated in a defined manner so that the process reliability during forming is further increased.
- the method according to the invention for producing a hollow profile is furthermore advantageously configured by securing the circuit board against displacement in the direction of the bending axis.
- resulting in the direction of the bending axis forces for example, in the longitudinal direction of the hollow profile unevenly distributed forming forces due to different diameters along the longitudinal axis of the hollow profile produced, be collected and a displacement of the board during Umformformgangs be prevented.
- a stop in the direction of the bending axis preventing stop can be used. A complex "clamping" of the board in one place is not necessary.
- tailored tubes are produced by the forming process.
- "Tailored Tubes” are specially adapted to the load situation, closed hollow profiles, which have different material thicknesses and material grades.
- the field of application of the "tailored tubes” is particularly in the automotive industry, to take into account the different loads in different areas of a space-frame structure and at the same time to ensure a minimum weight.
- the method according to the invention can be carried out particularly economically by using a deep-drawing press, a press bending press or a rolling-in device.
- Deep-drawing and die-bending presses can be easily adapted by incorporating the die-forming halves enabling the method, in order to enable the method according to the invention to be carried out.
- a curling device which, as already stated in the introduction, from the German patent application DE 198 27 798 A1 can be easily used using a coreless die and preferably at the same time allows for direct longitudinal seam welding of the profile. For carrying out the method according to the invention therefore relatively low investment costs are required.
- the advantages of the device according to the invention are that the inventive method can be carried out, which has a higher process reliability than the previously used method.
- a corresponding apparatus requires correspondingly less investment cost than previously used Devices with complex inner spines or mandrel halves.
- means for carrying out a longitudinal seam welding are provided, which enable an integrated longitudinal seam welding after completion of the forming process.
- Fig. 1a 1 shows a schematic sectional view of a first exemplary embodiment of a device according to the invention for producing a hollow profile 1, which has a base plate 2 and two coreless die halves 3, 4 arranged displaceably relative to one another includes having the desired profile shape of the hollow profile to be produced.
- the board 5 has in the deformation direction pre-bent edges 6, 7, which extend parallel to the bending axis 14.
- a projecting into the mold cavity 12 sword 8 which is arranged between the two mold halves 3, 4.
- the sword 8 runs parallel to the bending axis 14 over the entire length of the die.
- a sword 8 which is interrupted several times or only protrudes into the mold cavity 12 at some points.
- the die halves 3, 4 are moved towards one another according to the movement arrows 10, 11, so that the blank 5 arranged in the interior of the mold cavity 12 is shaped in accordance with the die halves.
- the Fig. 1b shows the embodiment of the device according to the invention after completion of the forming process.
- the board is now to a still open hollow section 5, for example in the form of a tube, formed around the bending axis 14.
- the sword 8 required for the forming process is pulled out by a movement of the sword holder 9 perpendicular to the longitudinal axis of the hollow section 5 from the hollow section 5 corresponding to the direction of movement 13, so that the hollow profile or tube 5 can now be welded longitudinally.
- the embodiment shows a particularly simple hollow profile in the form of a tube. However, it is conceivable, many developable in a plane profile shapes with the device according to the invention or with the produce process according to the invention.
- an oval-conical profile can be produced with even proportions.
- further reshaping of the edges and / or subsequent longitudinal seam welding for example using a laser, can follow.
- this is also carried out integrated in the device according to the invention.
- the Fig. 2a) to 2f show now in individual steps a simulation of a second embodiment of the inventive method for producing a hollow profile, again based on the production of a hollow section 5 in the form of a tube in a sectional view at different times.
- the board 5 which preferably has pre-bent in the deformation direction, edges 6, 7, inserted into a device 1 according to the invention for the production of hollow profiles according to the second embodiment.
- the device 1 comprises a swaging mold half 4, which has a sword 8 extending in the longitudinal direction of the entire swaging mold half 4 or parallel to the bending axis 14.
- the board 5 needs between the forming steps, shown in Fig. 2b ) and 2e ), no additional guidance, for example, by an internal die core or Gesenkformspalte or a firm clamping to ensure a reliable process forming the desired hollow section 5.
- no additional guidance for example, by an internal die core or Gesenkformspalte or a firm clamping to ensure a reliable process forming the desired hollow section 5.
- the cross-sectional shape of a slotted hollow profile 5 produced according to the second exemplary embodiment just described shows the Fig. 2f ) after molding from the device according to the invention 1.
- the slot 15 of the hollow profile can be seen.
- the fact that the Auskalibritation can already be performed within the device 1, the hollow profile produced is very accurate and can be particularly well welded longitudinally.
- the method according to the invention and the device according to the invention are thus ideally suited for the production of "tailored tubes”.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Herstellung eines Hohlprofils aus einer Platine, bei welchem die Platine zwischen zwei die gewünschte Profilform aufweisende und relativ zueinander verschiebbare Gesenkhälften eingelegt wird und durch eine Schließbewegung der Gesenkhälften die Platine zu einem geschlitzten Hohlprofil umgeformt wird, wobei die Umformung der Platine mit kernlosen Gesenkformhälften durchgeführt wird, sowie eine Vorrichtung zur Herstellung von Hohlprofilen, welche zwei relativ zueinander verschiebbar angeordnete Gesenkformhälften und gegebenenfalls eine Grundplatte aufweist, wobei die Gesenkformhälften die gewünschte Profilform des zu formenden Hohlprofils aufweisen.The invention relates to a method for producing a hollow profile from a board, in which the board between two the desired profile shape and having relatively movable die halves is inserted and by a closing movement of the die halves the board is formed into a slotted hollow profile, wherein the deformation of the board is carried out with coreless die halves, as well as an apparatus for producing hollow profiles, which has two relatively mutually displaceable Gesenkformhälften and optionally a base plate, wherein the Gesenkformhälften have the desired profile shape of the hollow profile to be formed.
In der Automobilindustrie werden zunehmend komplexe Hohlprofile verwendet, um in sogenannten Space-Frame-Strukturen die gestellten Anforderungen hinsichtlich der Festigkeit und des Gewichtes zu erfüllen. Neben der Umformung von längsnahtgeschweißten Rohren in belastungsgerecht ausgelegte, geschlossene Hohlprofile sind aus dem Stand der Technik diverse Verfahren zur Herstellung von Hohlprofilen bekannt. Eine besonders flexible und dennoch wirtschaftliche Herstellung von belastungsgerecht ausgelegten Hohlprofilen ermöglicht ein aus der auf die Anmelderin zurückgehenden deutschen Offenlegungsschrift
Daneben ist aus der gattungsgemäßen deutschen Patentschrift
Hiervon ausgehend liegt der vorliegenden Erfindung somit die Aufgabe zugrunde, ein gattungsgemäßes Verfahren sowie eine gattungsgemäße Vorrichtung zur Verfügung zu stellen, mit welchem bzw. mit welcher mit geringem apparativem Aufwand mit hoher Prozesssicherheit Hohlprofile aus einer Platine hergestellt werden können, welche bei Bedarf einwandfrei längsnahtgeschweißt werden kann.Proceeding from this, the present invention thus has the object to provide a generic method and a generic device available, with which or with which low cost equipment with high process reliability hollow profiles can be made from a board, which are properly longitudinally welded, if necessary can.
Gemäß einer ersten Lehre der vorliegenden Erfindung wird die oben aufgezeigte Aufgabe für ein gattungsgemäßes Verfahren zur Herstellung eines Hohlprofils dadurch gelöst, dass die Umformung mit kernlosen Gesenkhälften durchgeführt wird und ein Vorangleiten der Kanten der Platine während der Schließbewegung des Gesenks zur Bildung eines geschlitzten Hohlprofils verhindert wird, wodurch die Platine bei Fortführung der Schließbewegung der gesenkformhälften in Umfangsrichtung unter Druckgesetzt wird und sich unter Nachgeben an die Gesenkformhälften anlegt. Als Platinenwerkstoffe kommen alle gut umformbaren Metalle, insbesondere Stahl oder eine Stahllegierung in Betracht.According to a first teaching of the present invention, the above-described object of a generic method for producing a hollow profile is achieved in that the forming is carried out with coreless die halves and a Vorangleiten the edges of the board during the closing movement of the die to form a slotted hollow profile is prevented whereby the board is set in the circumferential direction under pressure upon continuation of the closing movement of the die-half molds and applies with yielding to the mold halves. Suitable board materials are all easily deformable metals, in particular steel or a steel alloy.
Es hat sich überraschenderweise gezeigt, dass auf ein Einformen der umzuformenden Platine in Formspalte, welche durch einen Gesenkkern und die äußeren Gesenkformhälften gebildet werden, verzichtet werden kann, ohne dass die Qualität des hergestellten geschlitzten Hohlprofils leidet. Dadurch, dass das Vorangleiten der Kanten der Platine bzw. der Kanten parallel zur Längsachse bzw. Biegeachse des zu formenden Hohlprofils in den Gesenkformhälften zunächst verhindert wird, wird die Platine bei Fortführung der Schließbewegung der Gesenkformhälften in Umfangsrichtung unter Druck gesetzt. Diesem in Umfangsrichtung gerichteten Druck kann die Platine nur nachgeben, indem sie sich an die äußeren Gesenkformhälften anlegt. Beim Anlegen an die Gesenkformhälften wird deshalb auch ohne den inneren Dorn oder Gesenkkern die Form des herzustellenden Hohlprofils lediglich durch die Profilform der Gesenkhälften eingenommen. Da sich die Platine aufgrund des Verzichts auf den Formspalt im Innenraum der Gesenkhälften frei umformen kann, wird die Gefahr eines Verklemmens der Platine, beispielsweise aufgrund von Oberflächenfehlern der Gesenkkerne, eliminiert und die Prozesssicherheit zur Herstellung des Hohlprofils deutlich verbessert. Zugleich wird beispielsweise durch ein Schwert oder andere Mittel zur Verhinderung des Vorangleitens der Kanten der Platine ein präziser Schlitz im Hohlprofil zwischen den umgebogenen Kanten der Platine erzeugt, welcher ein prozesssicheres Längsnahtverschweißen ermöglicht.It has surprisingly been found that can be dispensed with molding of the reshaped board in form of gaps, which are formed by a die core and the outer mold halves, without the quality of the produced slotted hollow profile suffers. Characterized in that the advancement of the edges of the board or the edges is initially prevented parallel to the longitudinal axis or bending axis of the hollow profile to be formed in the mold halves, the board is placed in continuation of the closing movement of the mold halves in the circumferential direction under pressure. This directed in the circumferential direction pressure can Give board only by applying to the outer mold halves. When creating the die halves, therefore, the shape of the hollow profile to be produced is taken only by the profile shape of the die halves without the inner mandrel or die core. Since the board can freely deform in the interior of the die halves due to the omission of the mold gap, the risk of jamming of the board, for example due to surface defects of the die cores, eliminated and the process reliability for the production of the hollow profile significantly improved. At the same time, for example, by a sword or other means for preventing the Voranleitens the edges of the board a precise slot in the hollow profile between the bent edges of the board generated, which allows a process-reliable longitudinal seam welding.
Gemäß einer ersten vorteilhaften Ausführungsform des erfindungsgemäßen Verfahrens wird zur Verhinderung des Vorangleitens der Kanten der Platine mindestens ein in den kernlosen Formhohlraum hineinragendes Schwert verwendet. Während der Schließbewegung des Werkzeuges gleiten, wie bereits ausgeführt, die Kanten der Platine entlang der inneren Gesenkhälftenoberfläche, bis diese auf das in den kernlosen Formhohlraum hineinragende Schwert treffen. Das Schwert sorgt dann, im Falle eines weiteren Schließens des Werkzeuges, für den Aufbau des in Umfangrichtung gerichteten Druckes innerhalb der Platine, welche zur Ausdehnung des Umfanges der Platine und damit zum exakten Anlegen der Platine an den inneren Formhohlraum der beiden Gesenkhälften führt. Gleichzeitig kann durch das Schwert auf einfache Weise gewährleistet werden, dass der durch die gegenüberliegenden Kanten der Platine entstandene Schlitz eine im wesentlichen konstante Breite aufweist.According to a first advantageous embodiment of the method according to the invention, at least one sword protruding into the coreless hollow space is used to prevent the edges of the board from advancing. During the closing movement of the tool, as already stated, the edges of the board slide along the inner die half surface until they strike the sword projecting into the coreless mold cavity. The sword then ensures, in the case of further closing of the tool, for the construction of the directed in the circumferential direction pressure within the board, which leads to the expansion of the circumference of the board and thus the exact application of the board to the inner mold cavity of the two die halves. At the same time can be ensured by the sword in a simple manner that the slot formed by the opposite edges of the board has a substantially constant width.
Das Schwert kann beispielsweise über die gesamte Längsachse des späteren Hohlprofils verlaufen. Es ist aber auch möglich, ein Schwert zu verwenden, welches nur in Teilbereichen in den Formhohlraum hineinreicht.The sword can, for example, extend over the entire longitudinal axis of the later hollow profile. But it is also possible to use a sword, which extends only in some areas in the mold cavity.
Gemäß einer weitergebildeten Ausführungsform des erfindungsgemäßen Verfahrens zur Herstellung eines Hohlprofils wird ein zwischen den Gesenkhälften oder in einer Gesenkhälfte angeordnetes Schwert verwendet. Während das zwischen den Gesenkhälften angeordnete Schwert ermöglicht, dieses nach dem Umformen auf einfache Weise zu entfernen, eröffnet ein in einer Gesenkformhälfte angeordnetes Schwert die Verwendung von Gesenk- und Biegepressen ohne große Umbaumaßnahmen.According to a further developed embodiment of the method according to the invention for producing a hollow profile, a sword arranged between the die halves or in a die half is used. While the sword disposed between the die halves allows it to be easily removed after forming, a sword disposed in a die half opens up the use of die and bend presses without much rebuilding.
Vorzugsweise wird das Hohlprofil während des Schließvorgangs der Gesenkhälften auskalibriert, d.h. der Druck in Umfangsrichtung so stark erhöht, dass eine maßgenaue Umformung der Platine entsprechend des durch die Gesenkhälften gebildeten Formhohlraums verursacht wird. Eine nachträgliche Bearbeitung zur Erzielung der Maßgenauigkeit ist bei diesen Hohlprofilen insofern nicht mehr notwendig.Preferably, the hollow profile is calibrated out during the closing process of the die halves, i. the pressure in the circumferential direction increased so much that a dimensionally accurate deformation of the board is caused in accordance with the mold cavity formed by the die halves. Subsequent processing to achieve the dimensional accuracy is so far no longer necessary in these hollow sections.
Das Auskalibrieren kann, gemäß einer Ausgestaltung des erfindungsgemäßen Verfahrens, auch ohne Schwert durchgeführt werden. Hierbei wird ausgenutzt, dass die sich gegenüberstehenden Kanten der Platine am Ende des Umformvorgangs sich gegeneinander abstützen können, um so Druck in Umfangsrichtung aufzubauen.The Auskalibrieren can, according to an embodiment of the method, also be performed without a sword. This exploits that the opposing edges of the board at the end of the forming process can be supported against each other, so as to build up pressure in the circumferential direction.
Werden die Kanten der Platine in Verformungsrichtung vorgebogen, kann der Umformvorgang definiert eingeleitet werden, so dass die Prozesssicherheit während des Umformens weiter erhöht wird.If the edges of the board are pre-bent in the direction of deformation, the forming process can be initiated in a defined manner so that the process reliability during forming is further increased.
Das erfindungsgemäße Verfahren zur Herstellung eines Hohlprofils wird ferner dadurch vorteilhaft ausgestaltet, dass die Platine gegen ein Verschieben in Richtung der Biegeachse gesichert wird. Durch diese Maßnahme können in Richtung der Biegeachse resultierende Kräfte, beispielsweise bei in Längsrichtung des Hohlprofils ungleichmäßig verteilten Umformkräfte aufgrund unterschiedlicher Durchmesser entlang der Längsachse des hergestellten Hohlprofils, aufgefangen werden und ein Verschieben der Platine während des Umformformgangs verhindert werden. Hierzu kann beispielsweise ein eine Verschiebung in Richtung der Biegeachse verhindernder Anschlag verwendet werden. Ein aufwändiges "Einspannen" der Platine an einer Stelle ist nicht notwendig.The method according to the invention for producing a hollow profile is furthermore advantageously configured by securing the circuit board against displacement in the direction of the bending axis. By this measure, resulting in the direction of the bending axis forces, for example, in the longitudinal direction of the hollow profile unevenly distributed forming forces due to different diameters along the longitudinal axis of the hollow profile produced, be collected and a displacement of the board during Umformformgangs be prevented. For this purpose, for example, a stop in the direction of the bending axis preventing stop can be used. A complex "clamping" of the board in one place is not necessary.
Wird das Hohlprofil nach Entfernen des Schwerts, insbesondere in der gleichen Vorrichtung, längsnahtgeschweißt, kann ein geschlossenes Hohlprofil mit wenigen Arbeitsschritten wirtschaftlich zur Verfügung gestellt werden.If the hollow profile after removal of the sword, especially longitudinally welded in the same device, a closed hollow profile can be made economically available with a few steps.
Bevorzugt werden mit dem Umformverfahren "tailored Tubes" hergestellt. "Tailored Tubes" sind speziell an die Belastungssituation angepasste, geschlossene Hohlprofile, welche unterschiedliche Materialdicken bzw. Materialgüten aufweisen. Das Anwendungsgebiet der "tailored Tubes" liegt insbesondere im Automobilbau, um die unterschiedlichen Belastungen in verschiedenen Bereichen einer Space-Frame-Struktur zu berücksichtigen und gleichzeitig ein minimales Gewicht zu gewährleisten.Preferably, "tailored tubes" are produced by the forming process. "Tailored Tubes" are specially adapted to the load situation, closed hollow profiles, which have different material thicknesses and material grades. The field of application of the "tailored tubes" is particularly in the automotive industry, to take into account the different loads in different areas of a space-frame structure and at the same time to ensure a minimum weight.
Besonders wirtschaftlich kann das erfindungsgemäße Verfahren dadurch ausgeführt werden, dass eine Tiefziehpresse, eine Gesenkbiegepresse oder eine Einrollvorrichtung verwendet wird. Tiefzieh- und Gesenkbiegepressen können durch den Einbau von das Verfahren ermöglichenden Gesenkformhälften einfach angepasst werden, um eine Durchführung des erfindungsgemäßen Verfahren zu ermöglichen. Eine Einrollvorrichtung, welche, wie einleitend bereits ausgeführt, aus der deutschen Offenlegungsschrift
Gemäß einer zweiten Lehre der vorliegenden Erfindung wird die oben aufgezeigte Aufgabe durch eine gattungsgemäße Vorrichtung dadurch gelöst, dass die Gesenkhälften kernlos sind und Mittel vorgesehen sind, welche dazu geeignet sind, beim Schließen der Gesenkformhälften ein Vorangleiten der Kanten der Platine zur Bildung eines geschlitzten Hohlprofils verhindern, wodurch die Platine bei Fortführung der Schließbewegung der Gesenkformhälfen in Umfangsrichtung unter Druck gesetzt wird und sich unter Nachgeben an die Gesenkformhäften anlegt.According to a second teaching of the present invention, the above-described object is achieved by a generic device characterized in that the die halves are coreless and means are provided which are suitable for preventing closing the Gesenkformhälften a leading the edges of the board to form a slotted hollow profile , whereby the board is placed in continuation of the closing movement of the Gesenkformhälfen in the circumferential direction under pressure and rests under yielding to the Gesenkformhäften.
Wie bereits oben ausgeführt, ergeben sich die Vorteile der erfindungsgemäßen Vorrichtung darin, dass das erfindungsgemäße Verfahren durchgeführt werden kann, welches eine höhere Prozesssicherheit als das bisher benutzte Verfahren aufweist. Darüber hinaus erfordert eine entsprechende Vorrichtung aufgrund der Verwendung von kernlosen Gesenkformhälften entsprechend weniger Investitionskosten als die bisher verwendeten Vorrichtungen mit komplexen inneren Dornen oder Dornhälften.As already stated above, the advantages of the device according to the invention are that the inventive method can be carried out, which has a higher process reliability than the previously used method. In addition, due to the use of coreless die halves, a corresponding apparatus requires correspondingly less investment cost than previously used Devices with complex inner spines or mandrel halves.
Die Ausbildung eines Schlitzes mit konstanter Breite zwischen den senkrecht zur Bewegungsrichtung der Gesenkformhälften verlaufenden Kanten der Platine wird, gemäß einer nächsten vorteilhaften Ausführungsform der erfindungsgemäßen Vorrichtung, auf einfache Weise dadurch gewährleistet, dass ein in den Innenraum der Gesenkformhälften hineinragendes Schwert vorgesehen ist. Die Dicke des Schwertes im Bereich der Kontaktstellen der senkrecht zur Bewegungsrichtung der Gesenkformhälften verlaufenden Kanten der Platine bestimmt die Dicke des Schlitzes zwischen diesen Kanten und sorgt, bei einer senkrecht zu den Stirnflächen der Kanten verlaufenden Oberfläche des Schwertes, zur Ausbildung eines idealen Stumpfstoßes zur Verschweißung der beiden Kanten miteinander. Vorzugsweise verläuft das Schwert zumindest teilweise parallel zur Biegeachse des zu formenden Hohlprofils.The formation of a slot with a constant width between the perpendicular to the direction of movement of the mold halves extending edges of the board is, according to a next advantageous embodiment of the device according to the invention, ensured in a simple manner that a protruding into the interior of the mold halves sword is provided. The thickness of the sword in the area of the contact points of the perpendicular to the direction of movement of the mold halves extending edges of the board determines the thickness of the slot between these edges and ensures, with a perpendicular to the faces of the edges of the surface of the sword, to form an ideal butt joint for welding the both edges together. Preferably, the sword extends at least partially parallel to the bending axis of the hollow profile to be formed.
Das Schwert ist erfindungsgemäß zwischen den Gesenkformhälften oder in einer der Gesenkformhälften angeordnet. Im Falle des in einer der Gesenkformhälften angeordneten Schwertes ermöglicht diese Ausführungsform der erfindungsgemäßen Vorrichtung, dass Tiefziehpressen oder Gesenkbiegepressen zur Herstellung der Hohlprofile verwendet werden können. Andererseits bietet ein zwischen den Gesenkformhälften angeordnetes Schwert die Möglichkeit, dieses nach dem Umformen auf einfache Weise zu entfernen und das Hohlprofil ohne weiteren Zwischenschritt längsnahtzuschweißen.According to the invention, the sword is arranged between the die halves or in one of the die halves. In the case of the sword arranged in one of the die halves, this embodiment of the device according to the invention makes it possible to use deep-drawing presses or die-bending presses for producing the hollow profiles. On the other hand, a sword arranged between the die halves offers the possibility of easily removing it after forming and longitudinally welding the hollow profile without any further intermediate step.
Vorzugsweise sind, gemäß einer nächsten weitergebildeten Ausführungsform der erfindungsgemäßen Vorrichtung, Mittel zur Durchführung einer Längsnahtschweißung vorgesehen, welche ein integriertes Längsnahtschweißen nach dem Abschluss des Umformvorganges ermöglichen.Preferably, according to a next further developed embodiment of the device according to the invention, means for carrying out a longitudinal seam welding are provided, which enable an integrated longitudinal seam welding after completion of the forming process.
Es gibt nun eine Vielzahl von Möglichkeiten das erfindungsgemäße Verfahren sowie die erfindungsgemäße Vorrichtung zur Herstellung eines Hohlprofils weiterzubilden und auszugestalten. Hierzu wird verwiesen einerseits auf die den Patentansprüchen 1 und 11 nachgeordneten Patentansprüchen sowie der Beschreibung zweier Ausführungsbeispiele in Verbindung mit der Zeichnung. Die Zeichnung zeigt in
- Fig. 1a) und b)
- in einer schematischen Schnittansicht senkrecht zur Biegeachse ein erstes Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung zu zwei verschiedenen Zeitpunkten während der Durchführung des erfindungsgemäßen Verfahrens sowie
- Fig. 2a) bis f)
- in einer schematischen Schnittansicht eine Simulation eines zweiten Ausführungsbeispiels des erfindungsgemäßen Herstellverfahrens zu sechs verschiedenen Zeitpunkten.
- Fig. 1a) and b)
- in a schematic sectional view perpendicular to the bending axis, a first embodiment of a device according to the invention at two different times during the implementation of the method and method
- Fig. 2a) to f)
- in a schematic sectional view of a simulation of a second embodiment of the manufacturing method according to the invention at six different times.
Im vorliegenden Ausführungsbeispiel verläuft das Schwert 8 parallel zur Biegeachse 14 über die gesamte Länge des Gesenks. Allerdings kann auch ein mehrfach unterbrochenes oder nur an einigen Stellen in Formhohlraum 12 hineinragendes Schwert 8 verwendet werden.In the present embodiment, the
Bei der Durchführung des erfindungsgemäßen Verfahrens werden die Gesenkformhälften 3, 4 entsprechend der Bewegungspfeile 10, 11 aufeinander zu bewegt, so dass die im Inneren des Formhohlraumes 12 angeordnete Platine 5 entsprechend der Gesenkformhälften umgeformt wird.When carrying out the method according to the invention, the die halves 3, 4 are moved towards one another according to the
Die
Die
Werden nun die Gesenkformhälften 3, 4 aufeinander zu bewegt, so stößt die vorgebogene Kante 7 der Platine gegen das Schwert 8 und das Vorangleiten dieser Kante 7 der Platine wird verhindert. Die gegenüberliegende Kante 6 der Platine kann sich dagegen frei verformen bis diese, wie in
Überraschenderweise benötigt die Platine 5 zwischen den Umformschritten, dargestellt in
Die Querschnittsform eines nach dem soeben beschriebenen zweiten Ausführungsbeispiel hergestellten geschlitzten Hohlprofils 5 zeigt die
Claims (14)
- Method for the production of a hollow section from a blank (5), wherein the blank (5) is introduced between two halves (3, 4) of a die which have the desired section shape and can be displaced relative to one another and the blank (5) is formed into a slotted hollow section by a closing movement of the halves (3, 4) of the die, wherein the forming of the blank (5) is carried out with coreless halves (3, 4) of the die characterised in that the edges (6, 7) of the blank (5) are prevented from sliding ahead during the closing movement of the die to produce a slotted hollow section, thus the blank (5) is pressurized in the peripheral direction as the closing movement of the die halves continues and by yielding aligns to the two halves (3,4) of the die.
- Method for the production of a hollow section according to Claim 1, characterised in that to prevent the edges (6, 7) of the blank (5) from sliding ahead, at least one tongue (8) is used which projects into the coreless form cavity (12).
- Method for the production of a hollow section according to Claim 1 or 2, characterised in that a tongue (8) is used which is positioned between the halves (3, 4) of the die or in one half (3, 4) of the die.
- Method for the production of a hollow section according to any one of Claims 1 to 3, characterised in that the hollow section is fully calibrated during the closing procedure of the halves (3, 4) of the die.
- Method for the production of a hollow section according to Claim 4, characterised in that the hollow section is fully calibrated without the tongue (8).
- Method for the production of a hollow section according to any one of Claims 1 to 5, characterised in that the edges (6, 7) of the blank (5) are pre-bent in the deformation direction.
- Method for the production of a hollow section according to any one of Claims 1 to 6, characterised in that the blank (5) is secured against displacement in the direction of the bending axis (14).
- Method for the production of a hollow section according to Claim 3, characterised in that after the tongue (8) has been removed, the hollow section is straight bead welded, in particular in the same device.
- Method for the production of a hollow section according to any one of Claims 1 to 8, characterised in that "tailored tubes" are produced.
- Method for the production of a hollow section according to any one of Claims 1 to 9, characterised in that a deep drawing press, a press brake or a rolling device is used.
- Device for the production of hollow sections, in particular for carrying out a method according to Claims 1 to 10, which device has two halves (3, 4) of a die which are positioned displaceably relative to one another and optionally a base plate (2), the halves (3, 4) of the die having the desired section shape, characterised in that the halves (3, 4) of the die do not have a core and means (8) are provided which, when the halves (3, 4) of the die are closing, are capable of preventing the edges (6, 7) of the blank (5) from sliding ahead to produce a slotted hollow section (5) thus the blank (5) is pressurized in the peripheral direction as the closing movement of the die halves continues and by yielding aligns to the two halves (3,4) of the die.
- Device for the production of hollow sections according to Claim 11, characterised in that a tongue (8) is provided which projects into the coreless form cavity (12) of the halves (3, 4) of the die.
- Device for the production of hollow sections according to Claim 12, characterised in that the tongue (8) is positioned between the halves (3, 4) of the die or in one half (4) of the die.
- Device for the production of hollow sections according to any one of Claims 11 to 13, characterised in that means for carrying out a straight bead welding procedure are provided.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005057424A DE102005057424B4 (en) | 2005-11-30 | 2005-11-30 | Method and device for coreless molding of hollow profiles |
PCT/EP2006/068571 WO2007062991A1 (en) | 2005-11-30 | 2006-11-16 | Method and device for the coreless forming of hollow profiles |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1954420A1 EP1954420A1 (en) | 2008-08-13 |
EP1954420B1 true EP1954420B1 (en) | 2009-09-23 |
Family
ID=37682059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06819548A Ceased EP1954420B1 (en) | 2005-11-30 | 2006-11-16 | Method and device for the coreless forming of hollow profiles |
Country Status (6)
Country | Link |
---|---|
US (1) | US8959973B2 (en) |
EP (1) | EP1954420B1 (en) |
JP (1) | JP2009517222A (en) |
KR (1) | KR101260484B1 (en) |
DE (2) | DE102005057424B4 (en) |
WO (1) | WO2007062991A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107427879A (en) * | 2015-02-25 | 2017-12-01 | 新日铁住金株式会社 | Metal formed article and its manufacture method and its used manufacture device and mould including the tube with slit |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008056273B4 (en) * | 2008-11-06 | 2015-05-28 | Thyssenkrupp Steel Europe Ag | Method for producing a closed hollow profile, closed hollow profile produced by this method and device for producing such a closed hollow profile |
DE102009017571B4 (en) * | 2009-04-17 | 2016-09-22 | Airbus Defence and Space GmbH | Method and device for the production of pipe bends or pipe bend segments by forming, as well as correspondingly produced pipe bends or pipe bend segments |
DE102011051160A1 (en) * | 2011-06-17 | 2012-12-20 | Thyssenkrupp Steel Europe Ag | Method for producing slotted hollow profiles |
CN102886429A (en) * | 2011-07-18 | 2013-01-23 | 湖北通达股份有限公司 | Coreless edge rolling mould |
JP6456024B2 (en) * | 2014-01-31 | 2019-01-23 | キヤノン株式会社 | Roller, cartridge, image forming apparatus, and cylindrical shaft manufacturing method |
GB201516884D0 (en) * | 2015-09-23 | 2015-11-04 | Racine Marc André | Reinforced corrugated plastic sheets and products |
US11267217B2 (en) * | 2016-08-23 | 2022-03-08 | Marc-Andre Racine | System and method for bending a hollow core sheet using rods |
CN107081363B (en) * | 2017-04-13 | 2018-11-16 | 西安飞机工业(集团)有限责任公司 | A kind of the sheet metal component rubber pocket manufacturing process and composable mold in the hole containing quadric flanging |
US11207722B2 (en) * | 2018-09-10 | 2021-12-28 | Amsted Rail Company, Inc. | Systems and methods for manufacturing a ring from a metal sheet |
CN109570342B (en) * | 2018-11-08 | 2020-07-28 | 东莞市翔龙泰达实业有限公司 | Stamping process for product with gap width-thickness ratio less than 1 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1872276A (en) * | 1930-02-24 | 1932-08-16 | Smith Corp A O | Apparatus for and method of forming tubular blanks |
DE966111C (en) * | 1951-10-03 | 1957-07-11 | Mannesmann Huettenwerke A G | Device for round bending of sheet metal strips into pipes of large diameter |
FR1254669A (en) | 1960-04-20 | 1961-02-24 | Method and apparatus for welding metal tubes | |
US3285490A (en) * | 1963-06-25 | 1966-11-15 | Wallace Expanding Machines | Apparatus for making tubular members |
US4031734A (en) * | 1973-12-22 | 1977-06-28 | Skf Industrial Trading And Development Company B.V. | Method for the production of concentric machine elements |
JPS5747529A (en) * | 1980-09-04 | 1982-03-18 | Hitachi Metals Ltd | Forming method of pipe of thin plate |
DE19827798A1 (en) * | 1998-06-23 | 1999-12-30 | Thyssenkrupp Stahl Ag | Production of longitudinally welded pipes out of plane sheet metal blanks |
-
2005
- 2005-11-30 DE DE102005057424A patent/DE102005057424B4/en not_active Expired - Fee Related
-
2006
- 2006-11-16 DE DE502006004941T patent/DE502006004941D1/en active Active
- 2006-11-16 JP JP2008542708A patent/JP2009517222A/en active Pending
- 2006-11-16 EP EP06819548A patent/EP1954420B1/en not_active Ceased
- 2006-11-16 WO PCT/EP2006/068571 patent/WO2007062991A1/en active Application Filing
- 2006-11-16 US US12/095,566 patent/US8959973B2/en not_active Expired - Fee Related
-
2008
- 2008-06-27 KR KR1020087015849A patent/KR101260484B1/en active IP Right Grant
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107427879A (en) * | 2015-02-25 | 2017-12-01 | 新日铁住金株式会社 | Metal formed article and its manufacture method and its used manufacture device and mould including the tube with slit |
Also Published As
Publication number | Publication date |
---|---|
DE102005057424A1 (en) | 2007-05-31 |
KR20080073772A (en) | 2008-08-11 |
US8959973B2 (en) | 2015-02-24 |
WO2007062991A1 (en) | 2007-06-07 |
JP2009517222A (en) | 2009-04-30 |
EP1954420A1 (en) | 2008-08-13 |
DE502006004941D1 (en) | 2009-11-05 |
KR101260484B1 (en) | 2013-05-06 |
US20090044394A1 (en) | 2009-02-19 |
DE102005057424B4 (en) | 2009-03-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1954420B1 (en) | Method and device for the coreless forming of hollow profiles | |
EP1818115B1 (en) | Method for manufacturing a structural or chassis element for motor vehicles | |
EP1479842B1 (en) | Hollow section | |
DE102017008907B4 (en) | Tool and method for calibrating a produced by extrusion hollow profile component, and method for producing a hollow profile component for the automotive industry | |
EP2512702A1 (en) | Method and device for producing a half-shell part | |
DE19820473B4 (en) | Method and apparatus for producing a folded in cross-section and in the longitudinal direction at least partially bent product | |
DE102006025522B4 (en) | Method and device for producing structured, closed hollow profiles | |
DE60006917T2 (en) | Closed structural part | |
EP2720813B1 (en) | Method for producing slit hollow profiles | |
EP2108467B1 (en) | Method for producing highly dimensionally accurate half shells | |
DE2642743B2 (en) | Device for manufacturing a motor vehicle axle | |
EP0941780B1 (en) | Method and device for producing a hollow body with bulges at a distance from oneanother | |
WO2005051562A1 (en) | Production of ihu components with a flange | |
DE2624872B2 (en) | Process for the production of undivided rims | |
DE102018131967A1 (en) | Method for calibrating a curved hollow metal profile | |
DE10248356A1 (en) | Method and device for producing a weight-optimized pneumatic tire rim | |
WO2007115949A1 (en) | Method of producing structured hollow profiles | |
WO2000010746A2 (en) | Method for deforming through high inner pressure at least two hollow bodies having each at least one opening, especially metal tubes or metal hollow profiles | |
EP2959985B1 (en) | Profiled beam with increased flexural strength made of cold strip and method for producing same | |
EP1110637B1 (en) | Method for producing a component | |
EP2205370B1 (en) | Process and apparatus for producing a hollow body, and hollow body | |
DE102009007701B4 (en) | Method for producing a closed profile from a flat strip of material by roll forming | |
EP0892689B1 (en) | Process for increasing the wall thickness in hollow sections | |
DE102015103846A1 (en) | Bending tool for producing a profile from a roll profile, method for producing a profile, and use of a profile produced by the method | |
DE102013105324A1 (en) | Method for producing a motor vehicle component in the form of a torsion profile |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20080519 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE IT SE |
|
DAX | Request for extension of the european patent (deleted) | ||
RBV | Designated contracting states (corrected) |
Designated state(s): DE IT SE |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE IT SE |
|
REF | Corresponds to: |
Ref document number: 502006004941 Country of ref document: DE Date of ref document: 20091105 Kind code of ref document: P |
|
RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: THYSSENKRUPP STEEL EUROPE AG |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090923 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20100624 |
|
PGRI | Patent reinstated in contracting state [announced from national office to epo] |
Ref country code: IT Effective date: 20110501 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20121123 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131116 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20211118 Year of fee payment: 16 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 502006004941 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20230601 |