Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik IPK

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  • Publication
    A process model for elastomer-metal-pressfits
    ( 1995)
    Neu, S.
    ;
    Seliger, G.
    This paper descibes an analytical and numerical process model for elastomer-metal-pressfits. Based on the mathematical description of the fitting process, methods and experiments to identify the values of the process parameters, is checked by statistical comparison. In addition to analytical process formulation, numerical methods like Boundary Element Methods are used. Sliding friction values of a number of elastomer-metal-pressfits are examined experimentally. The results of the examination of ail parameters and the applicability of the model are discussed by an elastomer-metal absorbing spring.
  • Publication
    Analysis of the geometrical features detectability constraints for laser-scanner sensor planning
    ( 1994)
    Seliger, G.
    ;
    Zussmann, E.
    ;
    Schuler, H.
    This paper presents a planning approach or automatically synthesis of the viewpoint locations of a laser scanner that satisfy the detectability constaints of the geometrical feature of a given object. Dominant constraints taken into consideration were: the laser scanner field of view, depth of view, and the maximum permissible view angle. The approach is task driven and sensor model based. Information is given about the scanned object and its selected features, as well as about the optical characteristics of the sensor. Planning is presented as an optimization problem where the optimal laser scanner viewpoint must satisfy all the constraints simultaneously. The approach is demonstrated by scanning a 2D feature, and through planning an experiment in which robotic assembly of a car door is assisted by a laser scanner.
  • Publication
    Knowledge-based integration of design and assembly process planning
    ( 1993)
    Seliger, G.
    ;
    Hsieh, L.-H.
    ;
    Wang, Y.
    Concurrent engineering is an approach for fast product development. To support concurrent product design and process planning effective tools are needed. This paper desribes the development of a knowledge-based system for this approach. lt consists of tools for feature-based product design, design for assembly analysis, and process planning. All tools work on an integrated product and process model. The integrated model and the data structure of the developed assembly-features are discussed. The perspective of using knowledge-based methods for realizing concurent engineering is described.