Patents Assigned to EWAG AG
  • Patent number: 10695869
    Abstract: A process to produce a workpiece surface or a groove inner surface on a rod-shaped, especially cylindrical workpiece. From the workpiece, a rotary tool is supposed to be produced. The material removal is done using laser beam pulses, which are directed through a deflection device onto points of incidence within a pulse area with a specified outside contour on the workpiece. Multiple machine axis drives position the workpiece and the deflection device relative to one another so that the pulse area is oriented essentially at right angles to the emission direction of the laser beam pulses and at right angles to the section of the tool surface that has already been produced and that borders the pulse area. While the material is being removed, the at least one machine axis drive moves the pulse area relative to the workpiece along a specified path of motion while maintaining the orientation.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: June 30, 2020
    Assignee: EWAG AG
    Inventors: Christoph Pluss, Bruno Frei, Claus Dold, Maximilian Warhanek, Christian Walter
  • Patent number: 9770784
    Abstract: The invention relates to a method and a laser machining device 10 for machining a workpiece 13. The laser machining device 10 has a laser 11 for generating a laser beam 12, which is deflected by way of a deflecting device 15 in accordance with a pattern defined by a control unit 14 and is directed onto a workpiece surface 17 of a workpiece 13, which surface is to be machined. The point of impingement 18 of the deflected laser beam 12b on the workpiece surface 17 is guided along at least one spiral path within a circular hatched area 16. The spiral path 19 is characterized by spiral path parameters. One spiral path parameter is the line spacing a between neighboring points of intersection P of the spiral path 19 with an axis running through the center point M of the spiral path 19.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: September 26, 2017
    Assignee: EWAG AG
    Inventors: Christoph Pluess, Claus Dold, Gregory Eberle
  • Publication number: 20170113304
    Abstract: A process to produce a workpiece surface or a groove inner surface on a rod-shaped, especially cylindrical workpiece. From the workpiece, a rotary tool is supposed to be produced. The material removal is done using laser beam pulses, which are directed through a deflection device onto points of incidence within a pulse area with a specified outside contour on the workpiece. Multiple machine axis drives position the workpiece and the deflection device relative to one another so that the pulse area is oriented essentially at right angles to the emission direction of the laser beam pulses and at right angles to the section of the tool surface that has already been produced and that borders the pulse area. While the material is being removed, the at least one machine axis drive moves the pulse area relative to the workpiece along a specified path of motion while maintaining the orientation.
    Type: Application
    Filed: January 6, 2017
    Publication date: April 27, 2017
    Applicant: EWAG AG
    Inventors: CHRISTOPH PLUSS, BRUNO FREI, CLAUS DOLD, MAXIMILIAN WARHANEK, CHRISTIAN WALTER
  • Publication number: 20150258632
    Abstract: The invention relates to a method and a laser machining device 10 for machining a workpiece 13. The laser machining device 10 has a laser 11 for generating a laser beam 12, which is deflected by way of a deflecting device 15 in accordance with a pattern defined by a control unit 14 and is directed onto a workpiece surface 17 of a workpiece 13, which surface is to be machined. The point of impingement 18 of the deflected laser beam 12b on the workpiece surface 17 is guided along at least one spiral path within a circular hatched area 16. The spiral path 19 is characterized by spiral path parameters. One spiral path parameter is the line spacing a between neighboring points of intersection P of the spiral path 19 with an axis running through the center point M of the spiral path 19.
    Type: Application
    Filed: June 2, 2015
    Publication date: September 17, 2015
    Applicant: EWAG AG
    Inventors: CHRISTOPH PLUESS, CLAUS DOLD, GREGORY EBERLE
  • Patent number: 8969758
    Abstract: A method and apparatus for the laser machining of an unfinished object into a cutting tool with a cutting edge and a free surface. A laser generates laser beam impulses which are directed by a redirecting arrangement onto a surface of the unfinished object. An impulse reaches an impact location on the surface of the unfinished object under an inclination angle between the laser beam direction (R) of the impulse and the surface to be formed. The redirecting arrangement is controlled so that the laser beam impulses impact at adjacent impact locations and form a pulse zone. With a positioning arrangement a relative movement between the pulse zone and the unfinished object of predetermined speed is established so that the pulse zone formed by the impact locations moves along the surface of the unfinished object and an ablation layer of a layer thickness (dS) is removed with each contour pass.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: March 3, 2015
    Assignee: Ewag AG
    Inventors: Gerhard Brunner, Urs Hunziker, Roland Friederich, Heinrich Mushardt
  • Patent number: 8916798
    Abstract: A laser machining apparatus and method for producing from a workpiece a rotating cutting tool having a cutting edge and a flank. The laser machining apparatus works in two different operating modes. In the first operating mode, a first laser head is used for machining the workpiece at high advance speeds of the workpiece relative to the first laser head to form a rough desired contour with pulses having a duration in the nanosecond range resulting in laser melt cutting. Subsequently, the laser machining apparatus is operated in the second operating mode generating laser pulses with having a pulse duration in the picosecond range. In the second operating mode, a second laser head is activated by means of an optical scanner system and directs the laser pulses onto a two-dimensional pulse area on the surface of the workpiece, the material removal is accomplished by laser ablation.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: December 23, 2014
    Assignee: Ewag AG
    Inventor: Christoph Plüss
  • Patent number: 8872065
    Abstract: A method and an apparatus for the manufacture of a tool from a blank, such as, a rotational tool which rotates about a longitudinal axis (L) which includes at least one cutting edge and a chip groove. Preferably, the rotational tool is in its operating area in a cross-section thereof radially symmetrical with respect to it's longitudinal axis (L) and manufactured from a cylindrical blank by laser ablation using a laser machining apparatus with a laser scanner with a predetermined pulse area. The laser beam impulses are directed via a positioning arrangement within the pulse area onto a plurality of impact locations disposed along a predetermined pulse path (B). This pulse area is moved, like a tool, along the surface of the blank to form the chip groove and the cutting edge by sublimation of the material.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: October 28, 2014
    Assignee: EWAG AG
    Inventor: Christoph Pluss