EP2543451A1 - Device for joining workpieces - Google Patents
Device for joining workpieces Download PDFInfo
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- EP2543451A1 EP2543451A1 EP12173031A EP12173031A EP2543451A1 EP 2543451 A1 EP2543451 A1 EP 2543451A1 EP 12173031 A EP12173031 A EP 12173031A EP 12173031 A EP12173031 A EP 12173031A EP 2543451 A1 EP2543451 A1 EP 2543451A1
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- European Patent Office
- Prior art keywords
- workpiece
- contour
- tool
- radiation
- workpieces
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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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
- B21D39/031—Joining superposed plates by locally deforming without slitting or piercing
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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
Definitions
- the invention relates to a device for joining workpieces, as this generic from DE 10 2004 062 896 B4 is known.
- the workpieces have a coating, for example aluminum coatings on press-hardened workpieces, residues of the coatings can remain distributed in the weld seam and influence the fatigue strength.
- a coating for example aluminum coatings on press-hardened workpieces
- the forming is thermally supported, that is, the workpieces are before forming.
- sufficient energy is present in the materials to induce deformation-induced dislocation movements and to allow plastic deformation without brittle fracture occurring.
- a structural change at temperatures up to 900 ° C is considered to be non-harmful.
- two or more metal workpieces are positively connected with each other by being thermally assisted formed over a forming area.
- at least two tools are available, which can be pressed against each other with a compressive force.
- the workpieces adjoin one another in a forming plane between the tools and are irradiated with an electromagnetic radiation from a laser light source in such a way that a thermal activation or heating of the workpieces over the forming area is achieved.
- the electromagnetic radiation is directed by a transparent material for the electromagnetic radiation in at least one of the tools on the forming area.
- a disadvantage of this solution is that within the tool, a passage or opening must be present to accommodate the transparent material for the electromagnetic radiation. This is the production of the Tool complicated and costly. In addition, the strength of the tool is adversely affected and the size of a focal spot, in which the electromagnetic radiation is imaged in the forming plane on a workpiece, can not be easily adapted to changing requirements of the joining process.
- the invention has for its object to provide a device with easy to produce tools that can be easily adapted to changing requirements of the joining process.
- the object is achieved by a device for joining a first workpiece and a second workpiece, wherein the device has a first tool, having a first contour, and a second tool, having a second contour. Between the tools, the first workpiece and the second workpiece can be arranged one above the other in a forming plane. The first contour and the second contour can be pressed against each other via a forming area.
- the device has at least one radiation source for providing electromagnetic radiation which serves to heat the workpieces between the tools.
- the device according to the invention is characterized in that at least one respective radiation source is arranged laterally of the tools in such a way that their electromagnetic radiation is directed in each case onto the workpiece facing the radiation source and into the deformation region.
- each of the radiation sources is formed by at least one direct-radiating diode emitter.
- the one or more diode emitters may be arranged in a module.
- the radiation sources are advantageously connected to a controller, by means of the parameters of the electromagnetic radiation emitted by the radiation sources, for. B. emission duration and intensity are controllable.
- the at least one diode emitter of a radiation source is preferably arranged such that a focal spot is formed in the deformation region by the electromagnetic radiation emitted by the radiation source and directed onto the deformation region.
- the radiation source is preferably arranged such that the electromagnetic radiation is directed from a tool-side direction into the forming plane and into the forming area.
- the radiation source is arranged near and adjacent to the forming area facing side of the tools.
- these are directed from an area near and adjacent to the side of each tool in the forming area, which faces the forming area.
- first workpiece and a second workpiece between the first tool, having a first contour, and the second tool, having a second contour are superimposed in the forming plane so that they touch each other via a forming area.
- the electromagnetic radiation is directed over the forming area on each outwardly facing side of the workpieces and the forming area on the side of each workpiece is simultaneously exposed to the electromagnetic radiation.
- the first contour and the second contour are pressed against each other, so that the workpieces are formed over the heated forming area corresponding to the first contour and the second contour.
- Electromagnetic radiation can be all radiations that are suitable for heating the materials to be formed.
- the electromagnetic radiation is preferably a laser radiation.
- direct-radiating diodes or diode emitters has the advantage that the emitted radiation can be directed into the deformation area without major absorption and scattering losses and an energy-efficient heating of the workpieces can take place.
- tools without apertures or similar radiation-transmissive devices can be used.
- a focal spot in the forming plane can be easily controlled and corrected in terms of its size, shape, position and (spatial / temporal) intensity distribution.
- the aforementioned parameters are, for example, to adapt to the material, the material thickness, etc. of the workpieces to be reshaped or corrected during a series of forming operations.
- the existing radiation sources may be individual diodes, diode modules, or annular arrays of diodes around the tools.
- the first tool 5 and the second tool 6 are movable in an advancing direction 11 or counter to the feed direction 11 and undeliverable.
- the first contour 5.1 and the second contour 6.1 are each provided in a direction perpendicular to the feed direction 11 end face of the first tool 5 and the second tool 6 as mutually complementary elevations and depressions.
- the first contour 5.1 and the second contour 6.1 can be brought into direct contact with one another by delivering the first tool 5 and the second tool 6 in a forming plane 3.
- a first workpiece 1 and a second workpiece 2 are superimposed and movable along a transport direction 10. Mounts of the workpieces 1, 2 and means for transporting the workpieces 1, 2 in the transport direction 10 are not shown.
- a forming region 4 of the first tool 5 and the second tool 6 is by the extension of the first contour 5.1 and second contour 6.1 given in the forming plane 3.
- the first contour 5.1 is formed as a survey and the second contour 6.1 as a depression, wherein the dimensions of the survey a depression of existing in the forming area 4 material of a first workpiece 1 and a second workpiece 2 in the recess of the second contour 6.1 allowed (not shown).
- a die is formed.
- the radiation source 7 is formed by a direct-radiating diode emitter.
- the electromagnetic radiation is directed along each beam path (shown schematically) in each case in a radiation direction 8 to each workpiece 1 or 2, which faces the respective radiation source 7.
- the electromagnetic radiation is directed in each case in the forming plane 3 and in the forming region 4, so that on those surfaces of the workpieces 1 and 2, which face the respective radiation sources 7, the electromagnetic radiation in each focal spot 9 (see Fig. 2 ) is shown. Size and shape as well as the energy distribution over the focal spot 9 are selected so that the first workpiece 1 and the second workpiece 2 are heated via the forming region 4.
- the radiation sources 7 are controllable with respect to the parameters of the emitted electromagnetic radiation, such as emission duration and intensity.
- first contour 5.1 and the second contour 6.1 shaped differently, z. B. rounded, widening at the bottom (eg for clinching) or conical, be. There may also be more than two workpieces in the forming plane 3.
- the radiation source 7 arranged next to the first tool 5 is designed as a module consisting of a plurality of directly emitting diode emitters.
- the diode emitters are preceded by an optical system 12, by means of which the diode emitters emitted electromagnetic radiation bundled, directed along the radiation direction 8 and is imaged in a focal spot 9 on the surface of the first workpiece 1.
- the module is connected to a controller 13.
- two radiation sources 7 are each arranged laterally of the tools 5, 6, the emitted electromagnetic radiation of which is reproduced in a common focal spot 9 on the surface of the first workpiece 1 or of the second workpiece 2.
- the radiation sources 7 can each also be designed as a module consisting of a plurality of directly emitting diode emitters, to which an optic 12 is arranged upstream.
- the radiation sources 7 can be controlled individually via the controller 13.
- Fig. 4 an embodiment of the device according to the invention is shown, in which the radiation source 7 is formed by ring-shaped around a tool 5, 6 arranged directly radiating diode emitter (shown very schematically). Shown is, merely by way of example, a view in the feed direction 11 on the first contour 5.1 of the first tool 5 and on the radiation source. 7
- the radiation sources 7 on both sides of the forming plane 3 similar. z. B. as in Fig. 1 or in Fig. 2 shown, or be different. So can those in the FIGS. 1 and 2 be shown combined in a device. There may also be other numbers of radiation sources 7 on one side of the forming plane 3, which in turn may be the same or different.
- a first workpiece 1 and a second workpiece 2 are placed one above the other in the forming plane 3 and held there.
- the first workpiece 1 points upward, the second workpiece 2 points downward.
- the two workpieces 1 and 2 are set up so that an area over which the two workpieces 1 and 2 are to be reshaped coincides with the forming area 4.
- the radiation sources 7 are switched on and the electromagnetic radiation is directed in each case into the forming plane 3 and into the forming region 4, as a result of which the first workpiece 1 and the second workpiece 2 are heated via the forming region 4.
- the radiation sources 7 are turned off and the upper tool 5 and the lower tool 6 along the feed direction 11 moves toward each other until the material of the two workpieces 1 and 2 on the forming region 4 through the first contour 5.1 is pressed into the second contour 6.1.
- the first workpiece 1 and the second workpiece 2 are plastically deformed over the forming area 4.
- the upper tool 5 and the lower tool 6 along the feed direction 11 are separated again and the workpieces 1 and 2 along a transport direction 10 in the forming plane 3 shifted so far until the next area, on the first workpiece 1 and the second Workpiece 2 to be transformed, comes to lie in the forming area 4.
- the device according to the invention can be used in the technological fields of joining technology, for. B. in the body shop, are applied.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Fügen von Werkstücken, wie diese gattungsgemäß aus der
Dem zunehmenden Anspruch an leichte und trotzdem stabile Bauteile und Konstruktionen wird durch den Einsatz hochfester Werkstoffe immer mehr Rechnung getragen. Im Bereich der Stahlentwicklung sind in den letzten Jahren eine Vielzahl von Entwicklungen erfolgt, die es erlauben, Stähle mit Festigkeiten weit über 1000 N/mm2 herzustellen und in Serienprodukten, z. B. in Automobilen, einzusetzen.The increasing demand for lightweight yet sturdy components and constructions is increasingly being taken into account by the use of high-strength materials. In the field of steel development, a large number of developments have taken place in recent years, which make it possible to produce steels with strengths well above 1000 N / mm 2 and in series products, eg. In automobiles.
Mit zunehmender Festigkeit nimmt jedoch bei Stählen und bei metallischen Werkstoffen im Allgemeinen die Fließfähigkeit und damit die Dehnbarkeit ab., das heißt, einer Dehnung, die mit einem Bruch beendet wird, ist durch die enorm ansteigenden Fließspannungen eine enge Grenze gesetzt, die bereits bei weniger als 5% liegen kann.With increasing strength, however, in steels and in metallic materials, in general, the flowability and thus the ductility decreases. That is to say, an expansion which ends with a break is set by the enormously increasing yield stresses a narrow limit, which is already less pronounced than 5%.
Für eine Weiterverarbeitung der metallischen Werkstoffe, z. B. in Form von Blechen als Formteile oder Halbzeuge (Werkstücke), bedeutet dies, dass die Werkstoffe nur gering und dann noch bei sehr hohen Kräften verformt werden können. Werden solche Werkstücke geschweißt (Schmelzschweißen), wird der Werkstoff aufgeschmolzen. Nach der Erstarrung der Schmelze entsteht die Schweißnaht. In der Schweißnaht und in einer an die Schweißnaht angrenzenden Wärmeeinflusszone erfolgte durch das Aufschmelzen eine Gefügeänderung der Werkstoffe der miteinander verschweißten Werkstücke. Solche Gefügeänderungen mindern meist die Festigkeit bzw. das Energieaufnahmevermögen der Schweißnaht im Vergleich zu Bereichen der Werkstücke ohne Gefügeänderungen.For further processing of the metallic materials, eg. B. in the form of sheets as moldings or semi-finished products (workpieces), this means that the materials can be deformed only slightly and then at very high forces. If such workpieces are welded (fusion welding), the material is melted. After solidification of the melt, the weld is formed. In the weld seam and in a heat-affected zone adjoining the weld seam, a structural change of the materials of the workpieces welded together was effected by the melting. Such structural changes usually reduce the strength or the energy absorption capacity of the weld in comparison to areas of the workpieces without microstructural changes.
Weisen die Werkstücke eine Beschichtung auf, beispielsweise Aluminium-Überzüge bei pressgehärteten Werkstücken, können Reste der Beschichtungen, in der Schweißnaht verteilt bleiben und die Ermüdungsfestigkeit beeinflussen.If the workpieces have a coating, for example aluminum coatings on press-hardened workpieces, residues of the coatings can remain distributed in the weld seam and influence the fatigue strength.
Bei der Anwendung mechanischen Fügeverfahren werden Werkstücke, beispielsweise in einer Umformebene, einen Form- und/oder Kraftschluss bildend, umgeformt. Ein Beispiel ist das Clinchen, bei dem zwei übereinander liegende Werkstücke so verformt werden, dass eine form- und kraftschlüssige Verbindung zwischen beiden entsteht. Dazu ist es erforderlich, dass die Werkstoffe der Werkstücke eine Mindestdehnbarkeit aufweisen. Ist diese zu gering, kommt es während des Umformens zum spröden Bruch. Gleichzeitig können durch große auftretende Kräfte die Werkzeuge beschädigt werden. Aus diesem Grund gelten derzeit Werkstoffe wie z. B. Usibor® als nicht fügegeeignet.When using mechanical joining processes workpieces, for example, in a forming plane, forming a positive and / or frictional, reshaped. An example is the clinching, in which two superimposed workpieces are deformed so that a positive and non-positive connection between the two arises. For this it is necessary that the materials of the workpieces have a minimum ductility. If this is too low, brittle fracture occurs during forming. At the same time, the tools can be damaged by large forces occurring. For this reason, currently apply materials such. B. Usibor® as not suitable for joining.
Mechanische Verfahren rufen keine thermisch-bedingten Gefügeänderungen hervor, kommen jedoch bei hohen Festigkeiten, z. B. bei mehr als 600 MPa, und damit hohen auftretenden Fließspannungen, an ihre Verwendungsgrenzen, wenn für einen Fügeprozess zugleich Verformungen erforderlich sind.Mechanical processes cause no thermally-induced microstructural changes, but come at high strengths, eg. B. at more than 600 MPa, and thus high yield stress occurring, to their limits of use, if at the same time for a joining process deformations are required.
Um eine Verringerung der Fliessspannung der Werkstoffe zu bewirken, wird das Umformen thermisch unterstützt, das heißt die Werkstücke werden vor dem Umformen. Dadurch liegt ausreichend Energie in den Werkstoffen vor, um verformungsbedingte Versetzungsbewegungen zu induzieren und eine plastische Verformung ohne auftretenden Sprödbruch zu ermöglichen. Dabei wird eine Gefügeänderung bei Temperaturen bis zu 900°C als nicht schädlich angesehen.To effect a reduction of the flow stress of the materials, the forming is thermally supported, that is, the workpieces are before forming. As a result, sufficient energy is present in the materials to induce deformation-induced dislocation movements and to allow plastic deformation without brittle fracture occurring. In this case, a structural change at temperatures up to 900 ° C is considered to be non-harmful.
In einem Verfahren gemäß der
Nachteilig an dieser Lösung ist, dass innerhalb des Werkzeugs, eine Durchführung oder Durchbrechung vorhanden sein muss, um den für die elektromagnetische Strahlung transparenten Werkstoff aufzunehmen. Dadurch ist die Herstellung des Werkzeugs kompliziert und kostenintensiv. Zudem wird die Festigkeit des Werkzeugs nachteilig beeinflusst und die Größe eines Brennflecks, in dem die elektromagnetische Strahlung in der Umformebene auf einem Werkstück abgebildet ist, kann nicht in einfacher Weise an veränderte Anforderungen des Fügeprozesses angepasst werden.A disadvantage of this solution is that within the tool, a passage or opening must be present to accommodate the transparent material for the electromagnetic radiation. This is the production of the Tool complicated and costly. In addition, the strength of the tool is adversely affected and the size of a focal spot, in which the electromagnetic radiation is imaged in the forming plane on a workpiece, can not be easily adapted to changing requirements of the joining process.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung mit einfach herstellbaren Werkzeugen vorzuschlagen, die auf einfache Weise an veränderte Anforderungen des Fügeprozesses angepasst werden können.The invention has for its object to provide a device with easy to produce tools that can be easily adapted to changing requirements of the joining process.
Die Aufgabe wird durch eine Vorrichtung zum Fügen eines ersten Werkstücks und eines zweiten Werkstücks gelöst, wobei die Vorrichtung ein erstes Werkzeug, aufweisend eine erste Kontur, und ein zweites Werkzeug, aufweisend eine zweite Kontur aufweist. Zwischen den Werkzeugen kann das erste Werkstück und das zweite Werkstück in einer Umformebene übereinanderliegend angeordnet werden. Die erste Kontur und die zweite Kontur sind über einen Umformbereich gegeneinander drückbar. Die Vorrichtung weist mindestens eine Strahlungsquelle zur Bereitstellung einer elektromagnetischen Strahlung, die einer Erwärmung der Werkstücke zwischen den Werkzeugen dient, auf. Die erfindungsgemäße Vorrichtung ist dadurch gekennzeichnet, dass seitlich der Werkzeuge jeweils mindestens je eine Strahlungsquelle so angeordnet ist, dass deren elektromagnetische Strahlung jeweils auf das der Strahlungsquelle zugewandte Werkstück und in den Umformbereich gerichtet ist.The object is achieved by a device for joining a first workpiece and a second workpiece, wherein the device has a first tool, having a first contour, and a second tool, having a second contour. Between the tools, the first workpiece and the second workpiece can be arranged one above the other in a forming plane. The first contour and the second contour can be pressed against each other via a forming area. The device has at least one radiation source for providing electromagnetic radiation which serves to heat the workpieces between the tools. The device according to the invention is characterized in that at least one respective radiation source is arranged laterally of the tools in such a way that their electromagnetic radiation is directed in each case onto the workpiece facing the radiation source and into the deformation region.
Vorzugsweise ist jede der Strahlungsquellen durch mindestens einen direkt strahlenden Diodenemitter gebildet. Der eine oder mehrere Diodenemitter können in einem Modul angeordnet sein. Es kann weiterhin eine Optik vorhanden sein, mittels der die elektromagnetische Strahlung jeder der Strahlungsquellen beeinflusst, beispielsweise gebündelt und gerichtet, wird. Die Strahlungsquellen sind vorteilhafterweise mit einer Steuerung verbunden, mittels der Parameter der von den Strahlungsquellen emittierten elektromagnetischen Strahlung, z. B. Emissionsdauer und Intensität, steuerbar sind.Preferably, each of the radiation sources is formed by at least one direct-radiating diode emitter. The one or more diode emitters may be arranged in a module. There may also be an optical system by means of which the electromagnetic radiation of each of the radiation sources is influenced, for example focused and directed. The radiation sources are advantageously connected to a controller, by means of the parameters of the electromagnetic radiation emitted by the radiation sources, for. B. emission duration and intensity are controllable.
Vorzugsweise ist der mindestens eine Diodenemitter einer Strahlungsquelle so angeordnet, dass durch die von der Strahlungsquelle emittierte und auf dem Umformbereich gerichtete elektromagnetische Strahlung in dem Umformbereich ein Brennfleck gebildet ist.The at least one diode emitter of a radiation source is preferably arranged such that a focal spot is formed in the deformation region by the electromagnetic radiation emitted by the radiation source and directed onto the deformation region.
Die Strahlungsquelle ist vorzugsweise so angeordnet, dass die elektromagnetische Strahlung aus einer werkzeugseitigen Richtung in die Umformebene und in den Umformbereich gerichtet ist.The radiation source is preferably arranged such that the electromagnetic radiation is directed from a tool-side direction into the forming plane and into the forming area.
Dabei ist es besonders bevorzugt, wenn die Strahlungsquelle nahe und neben der dem Umformbereich zugewandten Seite eines der Werkzeuge angeordnet ist.It is particularly preferred if the radiation source is arranged near and adjacent to the forming area facing side of the tools.
Vorzugsweise sind diese von einem Bereich nahe und neben derjenigen Seite jedes Werkzeugs in den Umformbereich gerichtet, die jeweils dem Umformbereich zugewandt ist.Preferably, these are directed from an area near and adjacent to the side of each tool in the forming area, which faces the forming area.
Zum Fügen werden ein erstes Werkstück und ein zweites Werkstück zwischen dem ersten Werkzeug, aufweisend eine erste Kontur, und dem zweiten Werkzeug, aufweisend eine zweite Kontur, in der Umformebene übereinander gelegt, so dass diese sich über einen Umformbereich berühren. Nun wird auf jede nach außen weisende Seite der Werkstücke die elektromagnetische Strahlung über den Umformbereich gerichtet und der Umformbereich auf der Seite jedes Werkstücks simultan mit der elektromagnetischen Strahlung beaufschlagt.For joining, a first workpiece and a second workpiece between the first tool, having a first contour, and the second tool, having a second contour, are superimposed in the forming plane so that they touch each other via a forming area. Now, the electromagnetic radiation is directed over the forming area on each outwardly facing side of the workpieces and the forming area on the side of each workpiece is simultaneously exposed to the electromagnetic radiation.
Nach erfolgter Erwärmung werden die erste Kontur und die zweite Kontur gegeneinander gedrückt, so dass die Werkstücke über den erwärmten Umformbereich entsprechend der ersten Kontur und der zweiten Kontur umgeformt werden.After heating, the first contour and the second contour are pressed against each other, so that the workpieces are formed over the heated forming area corresponding to the first contour and the second contour.
Elektromagnetische Strahlungen können alle Strahlungen sein, welche zur Erwärmung der umzuformenden Werkstoffe geeignet sind. Bevorzugt ist die elektromagnetische Strahlung eine Laserstrahlung.Electromagnetic radiation can be all radiations that are suitable for heating the materials to be formed. The electromagnetic radiation is preferably a laser radiation.
Die Verwendung direkt strahlender Dioden oder Diodenemitter hat den Vorteil, dass die emittierte Strahlung ohne größere Absorptions- und Streuverluste in den Umformbereich gerichtet werden können und eine energieeffiziente Erwärmung der Werkstücke erfolgen kann. Durch Richten der elektromagnetischen Strahlung von seitlich je eines der Werkzeuge können Werkzeuge ohne Durchbrechungen oder ähnliche strahlungsdurchlässige Vorrichtungen verwendet werden. Zudem kann ein Brennfleck in der Umformebene hinsichtlich seiner Größe, Form, Lage und (räumlich/zeitlichen) Intensitätsverteilung leicht gesteuert und korrigiert werden. Die vorgenannten Parameter sind beispielsweise an den Werkstoff, die Werkstoffdicke usw. der umzuformenden Werkstücke anzupassen oder während einer Serie von Umformungsvorgängen zu korrigieren.The use of direct-radiating diodes or diode emitters has the advantage that the emitted radiation can be directed into the deformation area without major absorption and scattering losses and an energy-efficient heating of the workpieces can take place. By directing the electromagnetic radiation from each side of each of the tools, tools without apertures or similar radiation-transmissive devices can be used. In addition, a focal spot in the forming plane can be easily controlled and corrected in terms of its size, shape, position and (spatial / temporal) intensity distribution. The aforementioned parameters are, for example, to adapt to the material, the material thickness, etc. of the workpieces to be reshaped or corrected during a series of forming operations.
Es können mehrere Strahlungsquellen je Werkzeug vorhanden sein, die zudem verschiedenartig ausgeführt sein können. Beispielsweise können die vorhandenen Strahlungsquellen einzelne Dioden, Diodenmodule oder aber ringförmige Anordnungen von Dioden um die Werkzeuge sein.There may be a plurality of radiation sources per tool, which may also be designed differently. For example, the existing radiation sources may be individual diodes, diode modules, or annular arrays of diodes around the tools.
Es ist möglich, gepulste elektromagnetische Strahlung zu verwenden, wobei ein simultanes Beaufschlagen auch dann vorliegt, wenn die elektromagnetische Strahlung, mit der das eine Werkstück beaufschlagt wird und die elektromagnetische Strahlung, mit der das andere Werkstück beaufschlagt wird, zueinander phasenverschoben sind. Durch die von beiden Seiten her erfolgende Beaufschlagung werden die Werkstücke mindestens über ihren Umformbereich erwärmt. Die Werkstücke werden anschließend durch Zusammendrücken der Werkzeuge umgeformt.It is possible to use pulsed electromagnetic radiation, wherein a simultaneous application is also present when the electromagnetic radiation, which is applied to the one workpiece and the electromagnetic radiation, which is applied to the other workpiece, are mutually phase-shifted. As a result of the application occurring from both sides, the workpieces are heated at least over their forming area. The workpieces are then reshaped by squeezing the tools.
Die Erfindung wird nachfolgend anhand von Abbildungen und Ausführungsbeispielen näher erläutert. Dabei zeigen
- Fig. 1
- eine erste Ausführung der erfindungsgemäßen Vorrichtung als Prinzipskizze;
- Fig. 2
- eine zweite Ausführung der erfindungsgemäßen Vorrichtung mit einem Diodenemittermodul;
- Fig. 3
- eine dritte Ausführung der erfindungsgemäßen Vorrichtung mit zwei Strahlungsquellen je Werkzeug;
- Fig. 4
- eine vierte Ausführung der erfindungsgemäßen Vorrichtung mit einer ringförmigen Strahlungsquelle an einem Werkzeug.
- Fig. 1
- a first embodiment of the device according to the invention as a schematic diagram;
- Fig. 2
- a second embodiment of the device according to the invention with a diode emitter module;
- Fig. 3
- a third embodiment of the device according to the invention with two radiation sources per tool;
- Fig. 4
- A fourth embodiment of the device according to the invention with an annular radiation source on a tool.
Als wesentliche Bestandteile einer erfindungsgemäßen Vorrichtung sind in
Das erste Werkzeug 5 und das zweite Werkzeug 6 sind in einer Zustellrichtung 11 bzw. entgegen der Zustellrichtung 11 beweglich und einander zustellbar. Die erste Kontur 5.1 und die zweite Kontur 6.1 sind jeweils in einer senkrecht zur Zustellrichtung 11 verlaufenden Stirnfläche des ersten Werkzeugs 5 bzw. des zweiten Werkzeugs 6 als zueinander komplementäre Erhebungen und Vertiefungen vorhanden. Die erste Kontur 5.1 und die zweite Kontur 6.1 können durch Zustellung des ersten Werkzeugs 5 und des zweiten Werkzeugs 6 in einer Umformebene 3 in direkten Kontakt miteinander gebracht sein.The
In der Umformebene 3 sind ein erstes Werkstück 1 und ein zweites Werkstück 2 übereinander gelegt und entlang einer Transportrichtung 10 bewegbar. Halterungen der Werkstücke 1, 2 und Mittel zum Transport der Werkstücke 1, 2 in der Transportrichtung 10 sind nicht dargestellt.In the forming plane 3, a first workpiece 1 and a
Sind das erste Werkzeug 5 und das zweite Werkzeug 6 einander zugestellt, treffen sich deren erste Kontur 5.1 und zweite Kontur 6.1 in der Umformebene 3. Ein Umformbereich 4 des ersten Werkzeugs 5 und des zweiten Werkzeugs 6 ist durch die Ausdehnung der ersten Kontur 5.1 und der zweiten Kontur 6.1 in der Umformebene 3 gegeben.Are the
Die erste Kontur 5.1 ist als eine Erhebung und die zweite Kontur 6.1 als eine Vertiefung ausgebildet, wobei die Abmaße der Erhebung ein Eindrücken des im Umformbereich 4 vorhandenen Werkstoffs eines ersten Werkstücks 1 und eines zweiten Werkstücks 2 in die Vertiefung der zweiten Kontur 6.1 erlaubt (nicht gezeigt). Durch das erste Werkzeug 5 und das zweite Werkzeug 6 sowie deren Konturen 5.1 und 6.1 ist eine Matrize gebildet.The first contour 5.1 is formed as a survey and the second contour 6.1 as a depression, wherein the dimensions of the survey a depression of existing in the forming
Seitlich neben dem ersten Werkzeug 5 und dem zweiten Werkzeug 6 ist jeweils eine Strahlungsquelle 7 zur Bereitstellung elektromagnetischer Strahlung vorhanden. Die Strahlungsquelle 7 ist durch einen direkt strahlenden Diodenemitter gebildet. Die elektromagnetische Strahlung ist entlang je eines Strahlengangs (schematisch gezeigt) in je einer Strahlungsrichtung 8 auf jeweils dasjenige Werkstück 1 bzw. 2 gerichtet, das der jeweiligen Strahlungsquelle 7 zugewandt ist. Die elektromagnetische Strahlung ist dabei jeweils in die Umformebene 3 und in den Umformbereich 4 gerichtet, so dass auf denjenigen Oberflächen der Werkstücke 1 bzw. 2, die den jeweiligen Strahlungsquellen 7 zugewandt sind, die elektromagnetische Strahlung in je einem Brennfleck 9 (siehe
Mittels einer Steuerung 13, die mit den Strahlungsquellen 7 signalleitende verbunden ist, sind die Strahlungsquellen 7 hinsichtlich der Parameter der emittierten elektromagnetische Strahlung wie Emissionsdauer und Intensität steuerbar.By means of a
In weiteren Ausführungen können die erste Kontur 5.1 und die zweite Kontur 6.1 anders geformt, z. B. gerundet, sich am Grunde verbreiternd (z. B. für Clinchen) oder konisch, sein. Es können auch mehr als zwei Werkstücke in der Umformebene 3 vorhanden sein.In further embodiments, the first contour 5.1 and the second contour 6.1 shaped differently, z. B. rounded, widening at the bottom (eg for clinching) or conical, be. There may also be more than two workpieces in the forming plane 3.
In einer zweiten Ausführung der erfindungsgemäßen Vorrichtung gemäß
In einer dritten Ausführung der erfindungsgemäßen Vorrichtung sind gemäß
In
In weiteren Ausführungen der erfindungsgemäßen Vorrichtung können die Strahlungsquellen 7 auf beiden Seiten der Umformebene 3 gleichartig. z. B. wie in
Nachfolgend soll die Funktionsweise der Vorrichtung gemäß
Die erfindungsgemäße Vorrichtung kann in den technologischen Bereichen der Fügetechnik, z. B. im Karosseriebau, angewendet werden.The device according to the invention can be used in the technological fields of joining technology, for. B. in the body shop, are applied.
- 11
- erstes Werkstückfirst workpiece
- 22
- zweites Werkstücksecond workpiece
- 33
- UmformebeneUmformebene
- 44
- Umformbereichforming region
- 55
- erstes Werkzeugfirst tool
- 5.15.1
- erste Konturfirst contour
- 66
- zweites Werkzeugsecond tool
- 6.16.1
- zweite Kontursecond contour
- 77
- Strahlungsquelleradiation source
- 88th
- Strahlungsrichtungradiation direction
- 99
- Brennfleckfocal spot
- 1010
- Transportrichtungtransport direction
- 1111
- Zustellrichtunginfeed
- 1212
- Optikoptics
- 1313
- Steuerungcontrol
Claims (3)
dass seitlich der Werkzeuge (5, 6) jeweils mindestens je eine Strahlungsquelle (7) so angeordnet ist dass deren elektromagnetische Strahlung jeweils auf das der Strahlungsquelle (7) zugewandte Werkstück (1, 2) und in den Umformbereich (4) gerichtet ist.Device for joining a first workpiece (1) and a second workpiece (2), having a first tool (5), having a first contour (5.1), and having a second tool (6), having a second contour (6.1), between which the first workpiece (1) and the second workpiece (2) in a forming plane (3) can be arranged one above the other, wherein the first contour (5.1) and the second contour (6.1) via a forming area (4) are pressed against each other and at least one radiation source (7) for providing electromagnetic radiation which serves to heat the workpieces (1, 2) between the tools (5, 6), characterized
in that at least one respective radiation source (7) is arranged laterally of the tools (5, 6) such that their electromagnetic radiation is directed respectively to the workpiece (1, 2) facing the radiation source (7) and into the deformation region (4).
dass jede der Strahlungsquellen (7) durch mindestens einen direkt strahlenden Diodenemitter gebildet ist.Device according to claim 1, characterized in that
in that each of the radiation sources (7) is formed by at least one direct-radiating diode emitter.
dass der mindestens eine Diodenemitter einer Strahlungsquelle (7) so angeordnet ist, dass durch die von der Strahlungsquelle (7) emittierte und auf den Umformbereich (4) gerichtete elektromagnetische Strahlung auf der in dem Umformbereich (4) befindlichen und der Oberfläche des der Strahlungsquelle (7) zugewandten Werkstücks (1, 2) ein Brennfleck (9) gebildet ist, dessen Größe, Form, Lage und räumlich/zeitlichen Intensitätsverteilung steuerbar ist.Device according to claim 2, characterized in that
in that the at least one diode emitter of a radiation source (7) is arranged such that electromagnetic radiation emitted by the radiation source (7) and directed onto the deformation region (4) is present on the surface of the radiation source (4). 7) facing the workpiece (1, 2) a focal point (9) is formed, whose size, shape, position and spatial / temporal intensity distribution is controllable.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102011051636A DE102011051636A1 (en) | 2011-07-07 | 2011-07-07 | Device for joining workpieces |
Publications (2)
Publication Number | Publication Date |
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EP2543451A1 true EP2543451A1 (en) | 2013-01-09 |
EP2543451B1 EP2543451B1 (en) | 2014-01-29 |
Family
ID=46465042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20120173031 Active EP2543451B1 (en) | 2011-07-07 | 2012-06-21 | Device for joining workpieces |
Country Status (3)
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EP (1) | EP2543451B1 (en) |
DE (1) | DE102011051636A1 (en) |
ES (1) | ES2457498T3 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013190054A1 (en) * | 2012-06-21 | 2013-12-27 | Johnson Controls Gmbh | Method for connecting two components |
PL425994A1 (en) * | 2018-06-20 | 2019-01-02 | Politechnika Wrocławska | Method for increasing mechanical strength of the redrawn point-to-point connectors |
EP3589433A4 (en) * | 2017-03-03 | 2021-01-27 | Utica Enterprises, Inc. | Apparatus and method for securing a clinch nut to a sheet of advanced high strength steel and resultant assembly |
FR3116452A1 (en) * | 2020-11-25 | 2022-05-27 | Psa Automobiles Sa | Device for clinching a stack of parts held by the intermediary of a layer of structural glue interposed between the parts |
WO2023016762A1 (en) * | 2021-08-13 | 2023-02-16 | Tox Pressotechnik Gmbh & Co. Kg | Joining tool unit, tool gripper, and joining process |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113118309B (en) * | 2021-04-13 | 2022-07-01 | 陕西科技大学 | Method and device for friction-assisted riveting of ultrathin sheet |
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DE102004062896A1 (en) * | 2004-11-12 | 2006-05-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Device for joining workpieces in an interlocking manner comprises deforming the workpieces with tools in which one of the tools is formed by an opening |
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DE10020679A1 (en) * | 2000-04-27 | 2001-11-08 | Basf Coatings Ag | Sealing of seams and joints in motor vehicle bodies comprises application of an actinic radiation curable seam sealing material followed by curing of the material by means of actinic radiation. |
DE102007005164A1 (en) * | 2007-01-29 | 2008-07-31 | Stürmer, Martin, Dr. Ing. | Quality control process for processing laser beam involves processing beam from working cavity being detected by several detectors pointing in different radial directions |
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DE102007047469B3 (en) * | 2007-09-28 | 2009-01-22 | Jenoptik Automatisierungstechnik Gmbh | Laser-stripping of existing thin layer from workpiece along defined track, e.g. to make thin-film solar modules, employs elliptical focal zone having major axis forming angle with direction of travel |
DE102008063975A1 (en) * | 2008-12-19 | 2010-07-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for laser beam joining |
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2011
- 2011-07-07 DE DE102011051636A patent/DE102011051636A1/en not_active Withdrawn
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2012
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- 2012-06-21 ES ES12173031T patent/ES2457498T3/en active Active
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WO2002062499A1 (en) * | 2001-02-07 | 2002-08-15 | Schuoecker Dieter | Method for producing profiles by non-cutting shaping |
US20030037428A1 (en) * | 2001-08-22 | 2003-02-27 | Pei-Chung Wang | Method and apparatus for clinching metal sheets |
DE102004062896A1 (en) * | 2004-11-12 | 2006-05-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Device for joining workpieces in an interlocking manner comprises deforming the workpieces with tools in which one of the tools is formed by an opening |
DE102004062896B4 (en) | 2004-11-12 | 2006-09-07 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Device and method for the positive connection of workpieces |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2013190054A1 (en) * | 2012-06-21 | 2013-12-27 | Johnson Controls Gmbh | Method for connecting two components |
US9555461B2 (en) | 2012-06-21 | 2017-01-31 | Johnson Controls Gmbh | Method for connecting two components |
EP3589433A4 (en) * | 2017-03-03 | 2021-01-27 | Utica Enterprises, Inc. | Apparatus and method for securing a clinch nut to a sheet of advanced high strength steel and resultant assembly |
PL425994A1 (en) * | 2018-06-20 | 2019-01-02 | Politechnika Wrocławska | Method for increasing mechanical strength of the redrawn point-to-point connectors |
FR3116452A1 (en) * | 2020-11-25 | 2022-05-27 | Psa Automobiles Sa | Device for clinching a stack of parts held by the intermediary of a layer of structural glue interposed between the parts |
WO2023016762A1 (en) * | 2021-08-13 | 2023-02-16 | Tox Pressotechnik Gmbh & Co. Kg | Joining tool unit, tool gripper, and joining process |
Also Published As
Publication number | Publication date |
---|---|
ES2457498T3 (en) | 2014-04-28 |
EP2543451B1 (en) | 2014-01-29 |
DE102011051636A1 (en) | 2013-01-10 |
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