Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik IPK

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  • Publication
    Mobile camera for measuring and testing in the working area of machine tools
    ( 2013)
    Hohwieler, E.
    ;
    Feitscher, R.
    ;
    Uhlmann, E.
    For the development of production systems, the extent of flexibility, automation, and the mastery of operation of plants and processes have to meet increasing demands. The complexity of machines or the lack of transparency of procedures may exceed the capability of the machine operator, wherefore intelligent machines with enhanced abilities are significantly needed in the future. To push further automation of partial functions and the integration of new sensory capabilities, manufacturer of machine tools and machining centers are permanently involved in the quest of new solutions for a machine-integrated, process-oriented measuring as well as monitoring process sequences and machine equipment.
  • Publication
    Extended cutting form compensation
    ( 2008)
    Kraft, M.
    ;
    Hohwieler, E.
    ;
    Uhlmann, E.
    The existing approach of a geometrical approximation of the cutting tool edge by a simple radius is insufficient for the increasing demands of manufacturing accuracy. Deviations of the present cutting form from the ideal form of radius lead to geometrical errors in the work piece. Existing methods of control-implemented methods for the compensation of the cutting edge radius encounter their limits. A solution for the capture and control based compensation of deterioration-contingent geometric errors on tool edges is described. The current shape of the cutting edge is captured by optical measurement and serves as input for the new developed compensation algorithms. The requirement specification for the new high-resolution optical system was developed on the basis of the experience gained within a previous project. The previous project Machine vision for tool setting used an optical system with the telecentric lens (scale 1:2.5, Resolution 25 urn, Aperture 25mm, Distance of observatio 300 mm) Due to specific designed algorithms it guaranteed a precision of 7 micro meter for the measurement of tool offset and tool radius in a machine tool. This optical system is not directly scalable by a factor of 1/20 because of completely different optical properties in the submicrometer range.
  • Publication
    Monitoring of slowly progressing deterioration of CNC-machine axes
    ( 2006)
    Uhlmann, E.
    ;
    Hohwieler, E.
    ;
    Geisert, C.
  • Publication
    Providing online services for machine operation and maintenance
    ( 2004)
    Uhlmann, E.
    ;
    Hohwieler, E.
    ;
    Berger, R.
  • Publication
    Analysis of force signals in HSC-turning for process monitoring
    ( 2000)
    Uhlmann, E.
    ;
    Hohwieler, E.
    ;
    Geisert, C.
    ;
    Becker, F.
  • Publication
    New structures and methods for control-integrated process supervision
    ( 1999)
    Uhlmann, E.
    ;
    Hohwieler, E.
    ;
    Becker, F.