EP1753578A1 - Device and method for fracture splitting of workpieces - Google Patents

Device and method for fracture splitting of workpieces

Info

Publication number
EP1753578A1
EP1753578A1 EP05743372A EP05743372A EP1753578A1 EP 1753578 A1 EP1753578 A1 EP 1753578A1 EP 05743372 A EP05743372 A EP 05743372A EP 05743372 A EP05743372 A EP 05743372A EP 1753578 A1 EP1753578 A1 EP 1753578A1
Authority
EP
European Patent Office
Prior art keywords
workpiece
annular section
laser
notches
peripheral surface
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.)
Withdrawn
Application number
EP05743372A
Other languages
German (de)
French (fr)
Inventor
Stefan Hansch
Horst Wisniewski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfing Kessler Sondermaschinen GmbH
Original Assignee
Alfing Kessler Sondermaschinen GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alfing Kessler Sondermaschinen GmbH filed Critical Alfing Kessler Sondermaschinen GmbH
Publication of EP1753578A1 publication Critical patent/EP1753578A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
    • B23D31/002—Breaking machines, i.e. pre-cutting and subsequent breaking
    • B23D31/003—Breaking machines, i.e. pre-cutting and subsequent breaking for rings
    • 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
    • Y10T225/00—Severing by tearing or breaking
    • Y10T225/30—Breaking or tearing apparatus
    • Y10T225/307—Combined with preliminary weakener or with nonbreaking cutter
    • Y10T225/321—Preliminary weakener
    • 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
    • Y10T225/00—Severing by tearing or breaking
    • Y10T225/30—Breaking or tearing apparatus
    • Y10T225/371—Movable breaking tool

Definitions

  • the invention relates to devices and methods for breaking an annular section of a workpiece.
  • the breaking separation of workpieces is used, for example, in the production of connecting rods or crankcases for internal combustion engines.
  • two diametrically opposite notches are formed in the inner circumferential surface of a bearing section, which give a plane of fracture along which the workpiece can be separated into two parts.
  • the formation of the notches, also called scratches, takes place in a clearing station or laser station.
  • the fracture separation takes place in a spatially separated fracture separation station, in which an expansion element - for example an expansion mandrel or a pair of expansion jaws - is introduced into the section to be separated, so that the workpiece is applied along the predetermined breaking plane by the spreading forces applied and the stress concentration in the notch crests is separated.
  • an expansion element - for example an expansion mandrel or a pair of expansion jaws - is introduced into the section to be separated, so that the workpiece is applied along the predetermined breaking plane by the spreading forces applied and the stress concentration in the notch crests is separated.
  • the notches defining the fracture plane can be formed, for example, by means of a broaching process. Due to the shape of the broaching tool, V-shaped notches are formed which have a comparatively large notch width.
  • a method is known from US Pat. No. 5,208,979 in which a laser is used to produce such notches.
  • the laser beam which runs obliquely to the surface to be scratched, is pivoted transversely to the notch in addition to its axial feed.
  • the resulting notch is also V-shaped.
  • such notches are also produced according to EP 0 808 228 B1 by means of a laser in the inner circumferential surface of a connecting rod bearing section.
  • the laser is controlled in such a way that a large number of notch sections which are spaced apart from one another and lie in a line in a row are formed.
  • the angle between the axis of the notch sections and the connecting rod axis is preferably between 30 ° and 60 °.
  • WO 97/22430 also describes a method for producing a scribe point for breaking a connecting rod, in which the scribe point is formed along one side of a fracture separation plane by depressions with webs arranged from the component surface.
  • the webs for generating first starter cracks for triggering breakage are at least partially embrittled or hardened.
  • the laser is usually moved from above to the workpiece in a laser station, or alternatively the workpiece is guided upward to the stationary laser in order to form the notches or scribing points.
  • the workpiece is then transported to a separate break separation station and break-separated there, the one used for break separation Spreading element is also usually introduced from above into the annular portion of the workpiece.
  • the laser device and the break separation device can be advanced from opposite sides of the workpiece to the workpiece.
  • the laser device and the break separation device are integrated in a single processing station, in which they can access the workpiece from opposite sides.
  • the notches specifying the fracture plane can first be formed from one side of the workpiece by means of the laser device, and then the workpiece can be fractured immediately from the other side by means of the fracture separation device. After the notches have been formed, the workpiece no longer has to be conveyed from a laser device to a breaking separation station. This noticeably simplifies the workflow and also reduces the cost of the device, since instead of two separate stations - the laser station and the break separation station - only a single processing station has to be provided.
  • the laser device and the break-separating device are preferably spaced apart from one another in a direction which is at right angles to this conveying direction.
  • the laser device and the break separation device can be spaced apart from one another, for example, vertically or horizontally, that is to say they can be arranged one above the other or next to one another.
  • the laser device, the break separation device and / or the receptacle for machining the workpiece can be movably mounted by means of respective slides. Accordingly, either the laser device or the receptacle is delivered to form the notches. In the same way, either the fracture separation device or the receptacle with the workpiece can be suitably delivered for fracture separation.
  • the laser device can generate laser beams at any angle between 0 ° and 90 ° to the central axis of this annular section, for example parallel to this axis or parallel to the peripheral surface, or at right angles thereto.
  • the above-mentioned object is also achieved by a device for producing notches in a circumferential surface of an annular section of a workpiece according to claim 10 and a method for producing notches in a peripheral surface of an annular section of a workpiece by means of laser energy according to claim 15.
  • At least one laser beam is directed substantially parallel to the peripheral surface to form the notches in the peripheral surface of the annular portion.
  • the notches produced in the circumferential surface of the annular section of the workpiece can have a width of up to approximately 0.5 mm and a depth of approximately 1.0 mm.
  • FIG. 1 shows a connecting rod that can be break-separated by means of a device according to the invention
  • 2 the connecting rod after breaking separation
  • Fig. 3 a device according to the invention
  • 4 a further device according to the invention
  • 5 shows an alternative device according to the invention for breaking workpieces
  • FIG. 6 shows a top view of laser optics that can be used in a device according to the invention
  • FIG. 7 shows a sectional view of the laser optics from FIG. 6.
  • Fig. 1 shows a connecting rod 10, the annular bearing portion 12 can be separated by means of a device according to the invention.
  • two diametrically opposite notches 18 have already been formed on the inner peripheral surface 16 of the bearing section 12 by means of the laser device of a device according to the invention. These notches 18 give a plane of fracture before, along which the bearing section 12 can be fracture separated by means of the fracture separation device of a device according to the invention.
  • Fig. 2 shows schematically the bearing section 12 of the connecting rod after fracture separation: it has been divided into two parts 20, 22 along the fracture plane S.
  • the annular bearing section 12 can be attached to a crankshaft (not shown) by connecting the two parts 20, 22 formed during the fracture separation by means of two connecting rod screws 14 (FIG. 1).
  • FIG. 3 A first embodiment of the device according to the invention is shown in FIG. 3.
  • a laser device 30 for forming the notches and a break separator 32 for breaking the workpiece are integrated in a single processing station.
  • a receptacle 34 serves to store the workpiece, the annular section 12 of which is shown here in section, during the machining.
  • the diametrically opposite notches are formed in the inner circumferential surface 16 of the section 12 of the workpiece by means of a vertically adjustable laser device 30 provided below the receptacle 34.
  • the laser device 30 is mounted on a carriage 40, which in turn can be moved vertically up and down with respect to a stationary housing part. This vertical up and down movement takes place at right angles to a conveying direction B, in which the workpiece is conveyed into and out of the processing station.
  • the axes of the laser beams L for forming the notches run parallel to the central axis M of the annular section 12, and further parallel to the inner circumferential surface 16.
  • the laser beam is thus directed parallel to the surface to be scored. This also has the essential advantage that the laser beam can strike the workpiece directly from the laser device and does not need to be deflected additionally.
  • a break separation device 32 is used, which is arranged above the receptacle 34 and also vertically, i.e. at a right angle to the direction of conveyance B of the workpiece, in the direction of the receptacle 34.
  • the break separation device 32 is mounted on a carriage 42, which in turn can be moved vertically downwards and upwards with respect to a stationary housing part.
  • an expanding element such as an expanding mandrel or a pair of expanding jaws is used for breaking separation.
  • the workpiece can then be conveyed out of the processing station in the transport direction indicated by the arrow B and finally processed.
  • any other laser device known per se can also be used. It can also be a laser device of this type which generates only a single laser beam which, by suitable method of the laser device or of the workpiece, can be used to form both notches.
  • the known laser devices with intersecting beams can also be used.
  • the laser beams L can in principle form any angle between 0 ° and 90 ° with the central axis of the workpiece, but have angles of 0 ° and 90 ° 005/120756
  • FIG. 4 shows, for example, the case in which the laser device 30 is designed such that the axes of the laser beams L run at right angles to the central axis M of the annular section 12 and to the circumferential surface 16. Otherwise, the device shown in FIG. 4 is the same as that shown in FIG. 3.
  • the holder 34 can also be designed to be displaceable.
  • FIG. 5 the receptacle 34 is in turn attached to a vertically movable carriage 44, while the laser device 30 and the break separation device 32 are stationary. The infeed movement of the receptacle 34 again takes place at right angles to the direction of conveyance B of the workpiece.
  • the laser device 30 and the break separation device 32 are arranged one above the other, and the workpiece is moved horizontally through the processing station (direction B). However, it is equally conceivable to place the laser device 30 and the break separation device 32 next to one another, i.e. to be spaced horizontally.
  • FIGS. 6 and 7 show a top view and a sectional view of a laser optics 100, as could be used in a laser device 30 according to the invention.
  • the partial beams L ', L are deflected by means of adjustable beam deflections 120, 121 and directed to two swivel units 130.
  • these swivel units 130 each have a processing unit 131 which can be swiveled through 180 °; the pivoting direction is indicated in each case by an arrow V in FIG. 6.
  • the partial beams L ', L are deflected in the corresponding processing units 131 by means of a further adjustable beam deflection 122.
  • the laser beams L', L" are then guided through the processing units 131 to two laser heads 132 which are located at the end of the processing units 131 and from which the laser beams L ', L "emerge to form notches in a workpiece.
  • the design of the beam deflection 133 at the end of the processing unit 131 enables a special shape of the mirror surface to guide the laser beam cylindrically or oval in the transverse and longitudinal directions from the laser heads 132.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

The invention relates to a device for fracture splitting of an annular section (12) of a workpiece, with a housing (34) for mounting the workpiece (10), during the machining, a laser device (30), for the formation of two diametrically opposed nicks in an inner circumferential surface (16) of the annular section (12) by fusion of the material using laser energy and a fracture splitting device (32), for the fracture splitting of the annular section (12) of the workpiece (10) into two pieces along a fracturing plane (S) given by the nicks, characterised in that the laser device (30) and the fracture splitting device (32) form a single machining station and are embodied such that the formation of the nicks and fracture splitting of the workpiece (10) are carried out from opposing sides of the workpiece (10).

Description

Vorrichtung und Verfahren zum Bruchtrennen von WerkstückenDevice and method for breaking workpieces
Technisches GebietTechnical field
Die Erfindung betrifft Vorrichtungen und Verfahren für das Bruchtrennen eines ringförmigen Abschnitts eines Werkstücks .The invention relates to devices and methods for breaking an annular section of a workpiece.
Stand der TechnikState of the art
Das Bruchtrennen von Werkstücken findet beispielsweise bei der Herstellung von Pleueln oder Kurbelgehäusen für Verbrennungsmotoren Anwendung. Dabei werden in der Innenumfangsflache eines Lagerabschnitts zwei einander diametral gegenüberliegende Kerben ausgebildet, die eine Bruchebene vorgeben, entlang der das Werkstück in zwei Teile getrennt werden kann. Das Ausbilden der Kerben, auch Ritzen genannt, findet in einer Räumstation oder Laserstation statt.The breaking separation of workpieces is used, for example, in the production of connecting rods or crankcases for internal combustion engines. In this case, two diametrically opposite notches are formed in the inner circumferential surface of a bearing section, which give a plane of fracture along which the workpiece can be separated into two parts. The formation of the notches, also called scratches, takes place in a clearing station or laser station.
Das Bruchtrennen als solches erfolgt in einer räumlich getrennten Bruchtrennstation, in der ein Spreizelement - beispielsweise ein Spreizdorn oder ein Paar Spreizbacken - in den zu trennenden Abschnitt eingebracht wird, so dass das Werkstück durch die aufgebrachten Spreizkräfte und die Spannungskonzentration in den Kerbscheiteln entlang der vorgegebenen Bruchebene getrennt wird.As such, the fracture separation takes place in a spatially separated fracture separation station, in which an expansion element - for example an expansion mandrel or a pair of expansion jaws - is introduced into the section to be separated, so that the workpiece is applied along the predetermined breaking plane by the spreading forces applied and the stress concentration in the notch crests is separated.
Nach dem Bruchtrennvorgang (Cracken) und einigen Zwischenbearbeitungsschritten können die beiden Teile wieder zusammengefügt werden. Durch die beim Bruchtrennen entstehende unregelmäßige, vergleichsweise großflächige Bruchfläche wird ein definiertes Zusammenfügen des Werkstücks erleichtert, wobei die Verzahnungen der Bruchflächen ein seitliches Verschieben der Werkstückteile verhindern. 005/120756After the breaking process (cracking) and a few intermediate processing steps, the two parts can be put together again. A defined joining of the workpiece is facilitated by the irregular, comparatively large-area fracture surface that occurs during fracture separation, the toothing of the fracture surfaces preventing the workpiece parts from moving laterally. 005/120756
Die die Bruchebene vorgebenden Kerben können beispielsweise mittels eines Räumverfahrens ausgebildet werden. Bedingt durch die Form des Räumwerkzeugs werden dabei V-förmige Kerben ausgebildet, die eine vergleichsweise große Kerbweite aufweisen.The notches defining the fracture plane can be formed, for example, by means of a broaching process. Due to the shape of the broaching tool, V-shaped notches are formed which have a comparatively large notch width.
Aus US 5,208,979 ist ein Verfahren bekannt, in welchem ein Laser zum Erzeugen solcher Kerben verwendet wird. Dabei wird der schräg zur zu ritzenden Oberfläche verlaufende Laserstrahl zusätzlich zu seinem Axialvorschub quer zur entstehenden Kerbe verschwenkt. Die entstehende Kerbe ist ebenfalls V-förmig.A method is known from US Pat. No. 5,208,979 in which a laser is used to produce such notches. The laser beam, which runs obliquely to the surface to be scratched, is pivoted transversely to the notch in addition to its axial feed. The resulting notch is also V-shaped.
In Weiterbildung dieses Verfahrens werden solche Kerben auch gemäß EP 0 808 228 Bl mittels eines Lasers in der Innenumfangsflache eines Pleuellagerabschnitts erzeugt. Hier wird der Laser aber derart angesteuert, dass eine Vielzahl von voneinander beabstandeten und linienförmig hintereinander liegenden Kerbabschnitten ausgebildet werden. Der Winkel zwischen der Achse der Kerbabschnitte und der Pleuelachse beträgt vorzugsweise zwischen 30° und 60°.In a further development of this method, such notches are also produced according to EP 0 808 228 B1 by means of a laser in the inner circumferential surface of a connecting rod bearing section. Here, however, the laser is controlled in such a way that a large number of notch sections which are spaced apart from one another and lie in a line in a row are formed. The angle between the axis of the notch sections and the connecting rod axis is preferably between 30 ° and 60 °.
Schließlich beschreibt auch WO 97/22430 ein Verfahren zum Erzeugen einer Anrißstelle zum Bruchtrennen eines Pleuels, bei dem die Anrißstelle entlang einer Seite einer Bruchtrennebene durch von der Bauteiloberfläche aus angeordnete Vertiefungen mit Stegen ausgebildet wird. Bei einem Bauteil aus duktilem Metall werden zumindest die Stege zur Erzeugung erster Starterrisse zur Bruchauslösung zumindest abschnittsweise versprödet bzw. durchgehärtet.Finally, WO 97/22430 also describes a method for producing a scribe point for breaking a connecting rod, in which the scribe point is formed along one side of a fracture separation plane by depressions with webs arranged from the component surface. In the case of a component made of ductile metal, at least the webs for generating first starter cracks for triggering breakage are at least partially embrittled or hardened.
In all diesen bekannten Verfahren wird der Laser in einer Laserstation meist von oben zu dem Werkstück hin bewegt, oder alternativ das Werkstück aufwärts zu dem stationär angeordneten Laser geführt, um die Kerben oder Anrißstellen auszubilden. Anschließend wird das Werkstück zu einer separaten Bruchtrennstation befördert und dort bruchgetrennt, wobei das zum Bruchtrennen verwendete Spreizelement ebenfalls meist von oben in den ringförmigen Abschnitt des Werkstücks eingebracht wird.In all of these known methods, the laser is usually moved from above to the workpiece in a laser station, or alternatively the workpiece is guided upward to the stationary laser in order to form the notches or scribing points. The workpiece is then transported to a separate break separation station and break-separated there, the one used for break separation Spreading element is also usually introduced from above into the annular portion of the workpiece.
Darstellung der ErfindungPresentation of the invention
Es ist die Aufgabe der vorliegenden Erfindung, eine Vorrichtung und ein Verfahren zum Bruchtrennen eines ringförmigen Abschnitts eines Werkstücks der eingangs genannten Art zu schaffen, mit denen der Arbeitsablauf beim Bruchtrennen des Werkstücks vereinfacht wird.It is the object of the present invention to provide an apparatus and a method for breaking an annular section of a workpiece of the type mentioned at the outset, with which the workflow in the case of breaking the workpiece is simplified.
Diese Aufgabe wird einerseits gelöst mit einer Vorrichtung gemäß dem Anspruch 1 sowie einem Verfahren gemäß dem Anspruch 11.This object is achieved on the one hand with a device according to claim 1 and a method according to claim 11.
Demzufolge sind die Lasereinrichtung und die Bruchtrenneinrichtung von gegenüberliegenden Seiten des Werkstücks aus zu dem Werkstück hin zustellbar.As a result, the laser device and the break separation device can be advanced from opposite sides of the workpiece to the workpiece.
Die Lasereinrichtung und die Bruchtrenneinrichtung sind erfindungsgemäß in einer einzigen Bearbeitungsstation integriert, in der sie von gegenüberliegenden Seiten aus auf das Werkstück zugreifen können. In dieser Station können zunächst mittels der Lasereinrichtung von einer Seite des Werkstücks aus die die Bruchebene vorgebenden Kerben ausgebildet werden, und anschließend kann das Werkstück sofort von der anderen Seite aus mittels der Bruchtrenneinrichtung bruchgetrennt werden. Das Werkstück muss nach dem Ausbilden der Kerben nicht mehr von einer Lasereinrichtung hin zu einer Bruchtrennstation befördert werden. Dies vereinfacht den Arbeitsablauf spürbar und verringert außerdem auch die Anschaffungskosten der Vorrichtung, da statt zwei separater Stationen - der Laserstation und der Bruchtrennstation - nur eine einzige Bearbeitungsstation vorgesehen werden muss.According to the invention, the laser device and the break separation device are integrated in a single processing station, in which they can access the workpiece from opposite sides. In this station, the notches specifying the fracture plane can first be formed from one side of the workpiece by means of the laser device, and then the workpiece can be fractured immediately from the other side by means of the fracture separation device. After the notches have been formed, the workpiece no longer has to be conveyed from a laser device to a breaking separation station. This noticeably simplifies the workflow and also reduces the cost of the device, since instead of two separate stations - the laser station and the break separation station - only a single processing station has to be provided.
Bevorzugte Weiterbildungen der erfindungsgemäßen Vorrichtung und des erfindungsgemäßen Verfahrens sind in den zugehörigen abhängigen Ansprüchen beschrieben. Wenn das Werkstück in einer Beförderungsrichtung durch die Bearbeitungsstation hindurch befördert wird, sind die Lasereinrichtung und die Bruchtrenneinrichtung vozugsweise in einer Richtung voneinander beabstandet, die im rechten Winkel zu dieser Beförderungsrichtung verläuft. Die Lasereinrichtung und die Bruchtrenneinrichtung können beispielsweise vertikal oder horizontal voneinander beabstandet, d.h. übereinander oder nebeneinander angeordnet sein.Preferred developments of the device according to the invention and of the method according to the invention are described in the associated dependent claims. When the workpiece is conveyed through the machining station in a conveying direction, the laser device and the break-separating device are preferably spaced apart from one another in a direction which is at right angles to this conveying direction. The laser device and the break separation device can be spaced apart from one another, for example, vertically or horizontally, that is to say they can be arranged one above the other or next to one another.
Mittels jeweiliger Schlitten können die Lasereinrichtung, die Bruchtrenneinrichtung und/oder die Aufnahme zur Bearbeitung des Werkstücks beweglich gelagert sein. Zum Ausbilden der Kerben wird demnach entweder die Lasereinrichtung oder die Aufnahme zugestellt. In gleicher Weise kann zur Bruchtrennung entweder die Bruchtrenneinrichtung oder die Aufnahme mit dem Werkstück geeignet zugestellt werden.The laser device, the break separation device and / or the receptacle for machining the workpiece can be movably mounted by means of respective slides. Accordingly, either the laser device or the receptacle is delivered to form the notches. In the same way, either the fracture separation device or the receptacle with the workpiece can be suitably delivered for fracture separation.
Die Lasereinrichtung kann zur Ausbildung der Kerben in der Innenumfangsfl che des ringförmigen Abschnitts des Werkstücks Laserstrahlen in jedem Winkel zwischen 0° und 90° zur Mittelachse dieses ringförmigen Abschnitts erzeugen, beispielsweise parallel zu dieser Achse bzw. parallel zur Umfangsflache, oder im rechten Winkel dazu.To form the notches in the inner peripheral surface of the annular section of the workpiece, the laser device can generate laser beams at any angle between 0 ° and 90 ° to the central axis of this annular section, for example parallel to this axis or parallel to the peripheral surface, or at right angles thereto.
Andererseits wird die oben angegebene Aufgabe auch gelöst durch eine Vorrichtung zum Erzeugen von Kerben in einer U fangsflache eines ringförmigen Abschnitts eines Werkstücks gemäß dem Anspruch 10 sowie ein Verfahren zum Erzeugen von Kerben in einer Umfangsflache eines ringförmigen Abschnitts eines Werkstücks mittels Laserenergie gemäß dem Anspruch 15.On the other hand, the above-mentioned object is also achieved by a device for producing notches in a circumferential surface of an annular section of a workpiece according to claim 10 and a method for producing notches in a peripheral surface of an annular section of a workpiece by means of laser energy according to claim 15.
Demzufolge wird zum Ausbilden der Kerben in der Umfangsflache des ringförmigen Abschnitts zumindest ein Laserstrahl im wesentlichen parallel zur Umfangsflache gerichtet . 005/120756Accordingly, at least one laser beam is directed substantially parallel to the peripheral surface to form the notches in the peripheral surface of the annular portion. 005/120756
Die in der Umfangsflache des ringförmigen Abschnitts des Werkstücks erzeugten Kerben können dabei eine Breite bis etwa 0,5 mm und eine Tiefe bis etwa 1,0 mm haben.The notches produced in the circumferential surface of the annular section of the workpiece can have a width of up to approximately 0.5 mm and a depth of approximately 1.0 mm.
Die Ausrichtung des Laserstrahls parallel zur zu ritzenden Oberfläche war bisher aufgrund der relativ zur Länge der zu ritzenden Oberfläche kurzen Fokuslänge des Laserstrahls nicht für möglich gehalten worden. Untersuchungen der Erfinder haben überraschenderweise ergeben, dass diese Vorstellung irrig war. Bruchtrennversuche mit so geritzten Kerben haben zu qualitativ hochwertigen Werkstücken bei niedriger Bruchkraft geführt.The alignment of the laser beam parallel to the surface to be scratched was previously not considered possible due to the short focus length of the laser beam relative to the length of the surface to be scratched. Surveys by the inventors have surprisingly shown that this idea was wrong. Breaking tests with notches scored in this way have led to high-quality workpieces with low breaking strength.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
In den anliegenden Zeichnungen zeigtIn the accompanying drawings
Fig. 1 ein Pleuel, das mittels einer erfindungsgemäßen Vorrichtung bruchgetrennt werden kann, Fig . 2 das Pleuel nach dem Bruchtrennen, Fig . 3 eine erfindungsgemäße Vorrichtung, Fig . 4 eine weitere erfindungsgemäße Vorrichtung, Fig . 5 eine alternative erfindungsgemäße Vorrichtung zum Bruchtrennen von Werkstücken, Fig. 6 eine in einer erfindungsgemäßen Vorrichtung verwendbare Laseroptik in der Draufsicht, und Fig. 7 eine Schnittansicht der Laseroptik aus Fig. 6. Bevorzugte Ausführungsformen der Erfindung1 shows a connecting rod that can be break-separated by means of a device according to the invention, 2 the connecting rod after breaking separation, Fig. 3 a device according to the invention, 4 a further device according to the invention, 5 shows an alternative device according to the invention for breaking workpieces, FIG. 6 shows a top view of laser optics that can be used in a device according to the invention, and FIG. 7 shows a sectional view of the laser optics from FIG. 6. Preferred embodiments of the invention
Fig. 1 zeigt ein Pleuel 10, dessen ringförmiger Lagerabschnitt 12 mittels einer erfindungsgemäßen Vorrichtung bruchgetrennt werden kann.Fig. 1 shows a connecting rod 10, the annular bearing portion 12 can be separated by means of a device according to the invention.
Wie in Fig. 1 dargestellt ist, sind an der Innenumfangsflache 16 des Lagerabschnitts 12 mittels der Lasereinrichtung einer erfindungsgemäßen Vorrichtung bereits zwei einander diametral gegenüberliegende Kerben 18 ausgebildet worden. Diese Kerben 18 geben eine Bruchebene vor, entlang der der Lagerabschnitt 12 mittels der Bruchtrenneinrichtung einer erfindungsgemäßen Vorrichtung bruchgetrennt werden kann.As shown in FIG. 1, two diametrically opposite notches 18 have already been formed on the inner peripheral surface 16 of the bearing section 12 by means of the laser device of a device according to the invention. These notches 18 give a plane of fracture before, along which the bearing section 12 can be fracture separated by means of the fracture separation device of a device according to the invention.
Fig. 2 zeigt schematisch den Lagerabschnitt 12 des Pleuels nach dem Bruchtrennen: er ist entlang der Bruchebene S in zwei Teile 20, 22 geteilt worden.Fig. 2 shows schematically the bearing section 12 of the connecting rod after fracture separation: it has been divided into two parts 20, 22 along the fracture plane S.
Nach dem Bruchtrennen kann der ringförmige Lagerabschnitt 12 an einer (nicht dargestellten) Kurbelwelle angebracht werden, indem die beim Bruchtrennen entstandenen beiden Teile 20, 22 mittels zweier Pleuelschrauben 14 (Fig. 1) wieder miteinander verbunden werden.After the fracture separation, the annular bearing section 12 can be attached to a crankshaft (not shown) by connecting the two parts 20, 22 formed during the fracture separation by means of two connecting rod screws 14 (FIG. 1).
Eine erste Ausführungsform der erfindungsgemäßen Vorrichtung ist in Fig. 3 dargestellt. In einer einzigen Bearbeitungsstation sind eine Lasereinrichtung 30 zum Ausbilden der Kerben sowie eine Bruchtrenneinrichtung 32 zum Bruchtrennen des Werkstücks integriert .A first embodiment of the device according to the invention is shown in FIG. 3. A laser device 30 for forming the notches and a break separator 32 for breaking the workpiece are integrated in a single processing station.
Eine Aufnahme 34 dient dazu, das Werkstück, dessen ringförmiger Abschnitt 12 hier im Schnitt dargestellt ist, während der Bearbeitung zu lagern.A receptacle 34 serves to store the workpiece, the annular section 12 of which is shown here in section, during the machining.
Mittels einer unterhalb der Aufnahme 34 vorgesehenen, vertikal zustellbaren Lasereinrichtung 30 werden die diametral gegenüberliegenden Kerben in der Innenumfangsfl che 16 des Abschnitts 12 des Werkstücks ausgebildet. Die Lasereinrichtung 30 ist dazu an einem Schlitten 40 gelagert, der seinerseits bezüglich eines stationären Gehäuseteils vertikal auf- und abwärts beweglich ist. Diese vertikale auf- und Abwärtsbewegung erfolgt im rechten Winkel zu einer Beförderungsrichtung B, in der das Werkstück in die Bearbeitungsstation hinein und aus ihr heraus befördert wird.The diametrically opposite notches are formed in the inner circumferential surface 16 of the section 12 of the workpiece by means of a vertically adjustable laser device 30 provided below the receptacle 34. For this purpose, the laser device 30 is mounted on a carriage 40, which in turn can be moved vertically up and down with respect to a stationary housing part. This vertical up and down movement takes place at right angles to a conveying direction B, in which the workpiece is conveyed into and out of the processing station.
In der dargestellten Ausführungsform verlaufen die Achsen der Laserstrahlen L zum Ausbilden der Kerben parallel zur Mittelachse M des ringförmigen Abschnitts 12, und ferner parallel zur Innenumfangsflache 16. Bei der Erzeugung der Kerben als Vorbereitung für das Bruchtrennen des ringförmigen Abschnitts des Werkstücks wird der Laserstrahl somit parallel zur zu ritzenden Fläche gerichtet. Dies hat auch den wesentlichen Vorteil, dass der Laserstrahl ausgehend von der Lasereinrichtung direkt auf das Werkstück treffen kann und nicht zusätzlich umgelenkt zu werden braucht .In the illustrated embodiment, the axes of the laser beams L for forming the notches run parallel to the central axis M of the annular section 12, and further parallel to the inner circumferential surface 16. When creating the notches in preparation for breaking the ring-shaped section of the workpiece, the laser beam is thus directed parallel to the surface to be scored. This also has the essential advantage that the laser beam can strike the workpiece directly from the laser device and does not need to be deflected additionally.
Nach dem Ausbilden der Kerben mittels der Lasereinrichtung 30 kommt eine Bruchtrenneinrichtung 32 zum Einsatz, die oberhalb der Aufnahme 34 angeordnet ist und ebenfalls vertikal, d.h. rechtwinklig zur Beförderungsrichtung B des Werkstücks, in Richtung der Aufnahme 34 zustellbar ist. Die Bruchtrenneinrichtung 32 ist dazu an einem Schlitten 42 gelagert, der seinerseits bezüglich eines stationären Gehäuseteils vertikal ab- und aufwärts beweglich ist. Zum Bruchtrennen dient wie in herkömmlichen Vorrichtungen ein Spreizelement wie beispielsweise ein Spreizdorn oder ein Paar Spreizbacken.After the notches have been formed by means of the laser device 30, a break separation device 32 is used, which is arranged above the receptacle 34 and also vertically, i.e. at a right angle to the direction of conveyance B of the workpiece, in the direction of the receptacle 34. For this purpose, the break separation device 32 is mounted on a carriage 42, which in turn can be moved vertically downwards and upwards with respect to a stationary housing part. As in conventional devices, an expanding element such as an expanding mandrel or a pair of expanding jaws is used for breaking separation.
Anschließend kann das Werkstück in der durch den Pfeil B gekennzeichneten Beförderungsrichtung aus der Bearbeitungsstation heraus befördert und abschließend bearbeitet werden.The workpiece can then be conveyed out of the processing station in the transport direction indicated by the arrow B and finally processed.
Alternativ zu der gemäß Fig. 3 verwendeten Lasereinrichtung kann auch jede andere, an sich bekannte Lasereinrichtung verwendet werden. Es kann sich dabei auch um eine solche Lasereinrichtung handeln, die nur einen einzigen Laserstrahl erzeugt, der durch geeignetes Verfahren der Lasereinrichtung oder des Werkstücks zum Ausbilden beider Kerben dienen kann. Auch die an sich bekannten Lasereinrichtungen mit sich kreuzenden Strahlen können eingesetzt werden.As an alternative to the laser device used according to FIG. 3, any other laser device known per se can also be used. It can also be a laser device of this type which generates only a single laser beam which, by suitable method of the laser device or of the workpiece, can be used to form both notches. The known laser devices with intersecting beams can also be used.
Die Laserstrahlen L können dabei zwar grundsätzlich einen beliebigen Winkel zwischen 0° und 90° mit der Mittelachse des Werkstücks bilden, aber Winkel von 0° und 90° haben 005/120756The laser beams L can in principle form any angle between 0 ° and 90 ° with the central axis of the workpiece, but have angles of 0 ° and 90 ° 005/120756
entsprechend einen besonders niedrigen Energieeinsatz und eine besonders gut definierte Risseinleitung bei niedriger Brechkraft ergeben. In Fig. 4 ist beispielsweise der Fall dargestellt, in dem die Lasereinrichtung 30 so ausgestaltet ist, dass die Achsen der Laserstrahlen L im rechten Winkel zur Mittelachse M des ringförmigen Abschnitts 12 sowie zur Umfangsflache 16 verlaufen. Ansonsten gleicht die in Fig. 4 gezeigte Vorrichtung der in Fig. 3 gezeigten.accordingly result in a particularly low energy input and a particularly well-defined crack initiation with a low refractive power. 4 shows, for example, the case in which the laser device 30 is designed such that the axes of the laser beams L run at right angles to the central axis M of the annular section 12 and to the circumferential surface 16. Otherwise, the device shown in FIG. 4 is the same as that shown in FIG. 3.
Statt die Lasereinrichtung 30 und die Bruchtrenneinrichtung 32 mittels der Schlitten 40, 42 zu dem Werkstück auf der Aufnahme 34 hin und davon weg zu bewegen, kann auch die Aufnahme 34 verschiebbar ausgestaltet sein. Eine solche Variante ist in Fig. 5 dargestellt. Hier ist die Aufnahme 34 ihrerseits an einem vertikal beweglichen Schlitten 44 angebracht, während die Lasereinrichtung 30 und die Bruchtrenneinrichtung 32 stationär sind. Die Zustellbewegung der Aufnahme 34 erfolgt wiederum im rechten Winkel zur Beförderungsrichtung B des Werkstücks.Instead of moving the laser device 30 and the break separation device 32 towards and away from the workpiece on the holder 34 by means of the slides 40, 42, the holder 34 can also be designed to be displaceable. Such a variant is shown in FIG. 5. Here, the receptacle 34 is in turn attached to a vertically movable carriage 44, while the laser device 30 and the break separation device 32 are stationary. The infeed movement of the receptacle 34 again takes place at right angles to the direction of conveyance B of the workpiece.
In den Ausführungsformen der Figuren 3 bis 5 sind die Lasereinrichtung 30 und die Bruchtrenneinrichtung 32 übereinander angeordnet, und das Werkstück wird horizontal durch die Bearbeitungsstation hindurchbewegt (Richtung B) . Es ist jedoch ebenso gut denkbar, die Lasereinrichtung 30 und die Bruchtrenneinrichtung 32 nebeneinander, d.h. horizontal beabstandet anzuordnen.In the embodiments of FIGS. 3 to 5, the laser device 30 and the break separation device 32 are arranged one above the other, and the workpiece is moved horizontally through the processing station (direction B). However, it is equally conceivable to place the laser device 30 and the break separation device 32 next to one another, i.e. to be spaced horizontally.
Die Fig. 6 und 7 zeigen eine Draufsicht bzw. eine Schnittansicht einer Laseroptik 100, wie sie in einer erfindungsgemäßen Lasereinrichtung 30 verwendet werden könnte .6 and 7 show a top view and a sectional view of a laser optics 100, as could be used in a laser device 30 according to the invention.
Aus Fig. 6 ergibt sich zunächst der Strahlengang des Laserstrahls L durch diese Laseroptik 100 hindurch: ausgehend von dem Laser 140 durchläuft der Laserstrahl L zunächst einen justierbaren 50% / 50%-Strahlteiler 110, der den Laserstrahl L in zwei Teilstrahlen L', L" aufteilt. Mittels dieser beiden Teilstrahlen L', L" können ,„„„„^005/1207566 initially shows the beam path of the laser beam L through this laser optics 100: starting from the laser 140, the laser beam L first passes through an adjustable 50% / 50% beam splitter 110, which divides the laser beam L into two partial beams L ', L "by means of these two partial beams L ', L" , „„ „„ ^ 005/120756
gleichzeitig zwei Kerben in einem bruchzutrennenden Werkstück erzeugt werden. Dazu werden die Teilstrahlen L', L" mittels justierbarer Strahlumlenkungen 120, 121 umgelenkt und zu zwei Schwenkeinheiten 130 geleitet.two notches are simultaneously created in a workpiece to be broken. For this purpose, the partial beams L ', L "are deflected by means of adjustable beam deflections 120, 121 and directed to two swivel units 130.
Wie aus der Schnittansicht in Fig. 7 deutlich wird, weisen diese Schwenkeinheiten 130 jeweils eine um 180° schwenkbare Bearbeitungseinheit 131 auf; die Schwenkrichtung ist in Fig. 6 jeweils mittels eines Pfeils V gekennzeichnet. Die Teilstrahlen L', L" werden in den entsprechenden Bearbeitungseinheiten 131 noch mittels einer weiteren justierbaren Strahlumlenkung 122 umgelenkt. Durch die Bearbeitungseinheiten 131 hindurch werden die Laserstrahlen L', L" dann zu zwei Laserköpfen 132 geleitet, die sich am Ende der Bearbeitungseinheiten 131 befinden und aus denen die Laserstrahlen L', L" zum Ausbilden von Kerben in einem Werkstück austreten.As is clear from the sectional view in FIG. 7, these swivel units 130 each have a processing unit 131 which can be swiveled through 180 °; the pivoting direction is indicated in each case by an arrow V in FIG. 6. The partial beams L ', L "are deflected in the corresponding processing units 131 by means of a further adjustable beam deflection 122. The laser beams L', L" are then guided through the processing units 131 to two laser heads 132 which are located at the end of the processing units 131 and from which the laser beams L ', L "emerge to form notches in a workpiece.
Die Gestaltung der Strahlumlenkung 133 am Ende der Bearbeitungseinheit 131 ermöglicht es durch eine besondere Form der Spiegelfläche, den Laserstrahl zylindrisch bzw. oval in Quer- und Längsrichtung aus den Laserköpfen 132 zu leiten. The design of the beam deflection 133 at the end of the processing unit 131 enables a special shape of the mirror surface to guide the laser beam cylindrically or oval in the transverse and longitudinal directions from the laser heads 132.

Claims

5/120756 10 Patentansprüche 5/120756 10 patent claims
Vorrichtung zum Bruchtrennen eines ringförmigen Abschnitts (12) eines Werkstücks (10) , mit einer Aufnahme (34) zum Lagern des Werkstücks (10) während der Bearbeitung, einer Lasereinrichtung (30) zum Ausbilden von Kerben in einer Umfangsflache (16) des ringförmigen Abschnitts (12) , und einer Bruchtrenneinrichtung (32) zum Bruchtrennen des ringförmigen Abschnitts (12) des Werkstücks (10) entlang einer durch die Kerben vorgegebenen Bruchebene (S), dadurch gekennzeichnet, dass die Lasereinrichtung (30) und die Bruchtrenneinrichtung (32) eine einzige Bearbeitungsstation bilden und mit ihnen das Ausbilden der Kerben und das Bruchtrennen des Werkstücks (10) von gegenüberliegenden Seiten des Werkstücks (10) aus ausführbar sind.Device for breaking an annular section (12) of a workpiece (10), with a receptacle (34) for storing the workpiece (10) during processing, a laser device (30) for forming notches in a peripheral surface (16) of the annular section (12), and a fracture separation device (32) for fracture separation of the annular section (12) of the workpiece (10) along a fracture plane (S) predetermined by the notches, characterized in that the laser device (30) and the fracture separation device (32) are one form a single processing station and with them the formation of the notches and the fracture separation of the workpiece (10) can be carried out from opposite sides of the workpiece (10).
2. Vorrichtung nach Anspruch 1, bei welcher das Werkstück in einer Beförderungsrichtung (B) durch die Bearbeitungsstation hindurch befördert wird und die Lasereinrichtung (30) und die Bruchtrenneinrichtung (32) in einer Richtung voneinander beabstandet sind, die im rechten Winkel zu dieser Beförderungsrichtung (B) verläuft.2. Device according to claim 1, in which the workpiece is conveyed through the processing station in a conveying direction (B) and the laser device (30) and the fracture separating device (32) are spaced apart from one another in a direction which is at right angles to this conveying direction ( B) runs.
3. Vorrichtung nach Anspruch 1 oder 2, bei welcher die Lasereinrichtung (30) und die Bruchtrenneinrichtung (32) vertikal oder horizontal voneinander beabstandet sind.3. Device according to claim 1 or 2, in which the laser device (30) and the fracture separation device (32) are spaced apart vertically or horizontally.
4. Vorrichtung nach einem der vorangehenden Ansprüche, die außerdem einen Schlitten (42) aufweist, mittels dessen die Bruchtrenneinrichtung (32) zu der Aufnahme (34) hin und von dieser weg bewegbar ist.4. Device according to one of the preceding claims, further comprising a carriage (42), by means of the fracture separation device (32) can be moved towards and away from the receptacle (34).
5. Vorrichtung nach einem der vorangehenden Ansprüche, die außerdem einen Schlitten (44) aufweist, mittels dessen die Aufnahme (34) zu der Lasereinrichtung (30) und/oder der Bruchtrenneinrichtung (32) hin und von dieser weg bewegbar ist.5. Device according to one of the preceding claims, which also has a carriage (44) by means of which the receptacle (34) can be moved towards and away from the laser device (30) and / or the fracture separation device (32).
6. Vorrichtung nach einem der vorangehenden Ansprüche, bei welcher die Lasereinrichtung (30) und die Aufnahme (34) für das Werkstück (10) relativ zueinander derart angeordnet sind, dass ein von der Lasereinrichtung (30) erzeugter Laserstrahl (L) im wesentlichen parallel zur Umfangsflache (16) des Werkstückes (10) verläuft .6. Device according to one of the preceding claims, in which the laser device (30) and the receptacle (34) for the workpiece (10) are arranged relative to one another in such a way that a laser beam (L) generated by the laser device (30) is essentially parallel runs to the peripheral surface (16) of the workpiece (10).
7. Vorrichtung nach einem der Ansprüche 1 bis 6, bei welcher die Lasereinrichtung (30) zumindest einen Laserstrahl (L) im wesentlichen im rechten Winkel zur Mittelachse (M) des ringförmigen Abschnitts (12) des Werkstücks (10) erzeugt.7. Device according to one of claims 1 to 6, in which the laser device (30) generates at least one laser beam (L) essentially at right angles to the central axis (M) of the annular section (12) of the workpiece (10).
8. Vorrichtung zum Erzeugen von Kerben in einer Umfangsfl che (16) eines ringförmigen Abschnitts (12) eines Werkstücks (10) , mit einer Aufnahme (34) zum Lagern des Werkstücks (10) während der Bearbeitung, und einer Lasereinrichtung (30) zum Ausbilden von Kerben in der Umfangsflache (16) des ringförmigen Abschnitts (12) , dadurch gekennzeichnet, dass die Lasereinrichtung (30) und die Aufnahme (34) für das Werkstück (10) relativ zueinander derart angeordnet sind, dass ein von der Lasereinrichtung (30) erzeugter Laserstrahl (L) im wesentlichen parallel zur Umfangsflache (16) des Werkstückes (10) verläuft .8. Device for producing notches in a circumferential surface (16) of an annular section (12) of a workpiece (10), with a receptacle (34) for storing the workpiece (10) during processing, and a laser device (30) for Forming notches in the peripheral surface (16) of the annular section (12), characterized in that the laser device (30) and the receptacle (34) for the workpiece (10) are arranged relative to one another in such a way that one of the laser device (30 ) generated laser beam (L) essentially runs parallel to the peripheral surface (16) of the workpiece (10).
9. Vorrichtung nach einem der vorangehenden Ansprüche, die außerdem einen Schlitten (40) aufweist, mittels dessen die Lasereinrichtung (30) zu der Aufnahme (34) hin und von dieser weg bewegbar ist.9. Device according to one of the preceding claims, which also has a carriage (40) by means of which the laser device (30) can be moved towards and away from the receptacle (34).
10. Vorrichtung nach einem der vorangehenden Ansprüche 1 bis 6 oder 8, bei welcher die Lasereinrichtung (30) zumindest einen Laserstrahl (L) im wesentlichen parallel zur Mittelachse (M) des ringförmigen Abschnitts (12) des Werkstücks (10) erzeugt.10. Device according to one of the preceding claims 1 to 6 or 8, in which the laser device (30) generates at least one laser beam (L) essentially parallel to the central axis (M) of the annular section (12) of the workpiece (10).
11. Verfahren zum Bruchtrennen eines ringförmigen Abschnitts (12) eines Werkstücks (10) , in welchem zunächst mittels Laserenergie Kerben in einer Umfangsflache (16) dieses ringförmigen Abschnitts (12) ausgebildet werden, die den Verlauf einer Bruchebene (S) vorgeben, und in welchem der ringförmige Abschnitt (12) des Werkstücks (10) in einem anschließenden Bruchtrennvorgang entlang dieser Bruchebene (S) bruchgetrennt wird, dadurch gekennzeichnet, dass das Ausbilden der Kerben und das Bruchtrennen des Werkstücks (10) in einer einzigen Bearbeitungsstation von gegenüberliegenden Seiten des Werkstücks (10) aus ausgeführt werden.11. Method for fracture cutting an annular section (12) of a workpiece (10), in which notches are first formed in a peripheral surface (16) of this annular section (12) using laser energy, which determine the course of a fracture plane (S), and in in which the annular section (12) of the workpiece (10) is fractured in a subsequent fracture separation process along this fracture plane (S), characterized in that the formation of the notches and the fracture separation of the workpiece (10) in a single processing station from opposite sides of the workpiece (10) can be carried out.
12. Verfahren nach Anspruch 11, in welchem zum Ausbilden der Kerben in der Umfangsflache (16) des ringförmigen Abschnitts (12) des Werkstücks (10) zumindest ein Laserstrahl (L) im wesentlichen parallel zur Mittelachse dieses ringförmigen Abschnitts (12) gerichtet wird. 12. The method according to claim 11, in which to form the notches in the peripheral surface (16) of the annular section (12) of the workpiece (10) at least one laser beam (L) is directed substantially parallel to the central axis of this annular section (12).
3. Verfahren nach einem der Ansprüche 11 und 12, in welchem zum Ausbilden der Kerben in der Umfangsflache (16) des ringförmigen Abschnitts (12) zumindest ein Laserstrahl (L) im wesentlichen parallel zur Umfangsflache (16) gerichtet wird.3. Method according to one of claims 11 and 12, in which to form the notches in the peripheral surface (16) of the annular section (12) at least one laser beam (L) is directed substantially parallel to the peripheral surface (16).
14. Verfahren nach Anspruch 11, in welchem zum Ausbilden der Kerben in der Umfangsflache (16) des ringförmigen Abschnitts (12) des Werkstücks (10) zumindest ein Laserstrahl (L) im wesentlichen im rechten Winkel zur Mittelachse dieses ringförmigen Abschnitts (12) gerichtet wird.14. The method according to claim 11, in which, for forming the notches in the peripheral surface (16) of the annular section (12) of the workpiece (10), at least one laser beam (L) is directed substantially at right angles to the central axis of this annular section (12). becomes.
15. Verfahren zum zum Erzeugen von Kerben in einer Umfangsflache (16) eines ringförmigen Abschnitts (12) eines Werkstücks (10) mittels Laserenergie, dadurch gekennzeichnet, dass zum Ausbilden der Kerben in der Umfangsflache (16) des ringförmigen Abschnitts (12) zumindest ein Laserstrahl (L) im wesentlichen parallel zur Umfangsflache (16) gerichtet wird.15. A method for producing notches in a peripheral surface (16) of an annular section (12) of a workpiece (10) using laser energy, characterized in that for forming the notches in the peripheral surface (16) of the annular section (12) at least one Laser beam (L) is directed essentially parallel to the peripheral surface (16).
16. Verfahren nach Anspruch 12, 13 oder 15, in welchem die in der Innenumfangsfl che (16) des ringförmigen Abschnitts (12) des Werkstücks (10) erzeugten Kerben eine Breite bis etwa 0,5 mm und eine Tiefe bis etwa 1,0 mm haben. 16. The method according to claim 12, 13 or 15, in which the notches created in the inner peripheral surface (16) of the annular section (12) of the workpiece (10) have a width of up to about 0.5 mm and a depth of up to about 1.0 mm have.
EP05743372A 2004-06-11 2005-05-19 Device and method for fracture splitting of workpieces Withdrawn EP1753578A1 (en)

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KR20070029252A (en) 2007-03-13
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US20080061100A1 (en) 2008-03-13
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JP2008501540A (en) 2008-01-24
CN1964811A (en) 2007-05-16
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WO2005120756A1 (en) 2005-12-22
CA2569522A1 (en) 2005-12-22

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