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Serge Samper

  1. Caract\'erisation des d\'efauts d'une surface sph\'erique par d\'ecomposition modale.

    Tue, 02/02/2010 - 16:02 — SomNambul
    Authors: Pierre-Antoine Adragna, Serge Samper, Hugues Favreliere
    Subjects: Other
    Abstract

    The [ISO 1101] standard specifies the form errors with geometrical tolerances
    using the zone concept.To complete this concept, we present a generic method
    which adapts to any geometry and allows to describe any kind of errors. Thus,we
    can dissociate the part errors according to reference categories: position,
    orientation,form, waviness and roughnesses. Starting from a cloud of poinds
    representing the error measurement, the "modal" method decompose, like Fourier
    series,this error in a sum of sorted errors according to the ircomplexity
    degree (a number of "wavinesses").

  2. Modeling of 2D and 3D Assemblies Taking Into Account Form Errors of Plane Surfaces.

    Tue, 02/02/2010 - 16:02 — SomNambul
    Authors: Pierre-Antoine Adragna, Serge Samper, Maurice Pillet, Hugues Favreliere
    Subjects: Other
    Abstract

    The tolerancing process links the virtual and the real worlds. From the
    former, tolerances define a variational geometrical language (geometric
    parameters). From the latter, there are values limiting those parameters. The
    beginning of a tolerancing process is in this duality.

  3. A proposition of 3D inertial tolerancing to consider the statistical combination of the location and orientation deviations.

    Tue, 02/02/2010 - 16:02 — SomNambul
    Authors: Pierre-Antoine Adragna, Serge Samper, Maurice Pillet
    Subjects: Other
    Abstract

    Tolerancing of assembly mechanisms is a major interest in the product life
    cycle. One can distinguish several models with growing complexity, from
    1-dimensional (1D) to 3-dimensional (3D) (including form deviations), and two
    main tolerancing assumptions, the worst case and the statistical hypothesis.
    This paper presents an approach to 3D statistical tolerancing using a new
    acceptance criterion. Our approach is based on the 1D inertial acceptance
    criterion that is extended to 3D and form acceptance.

  4. Optimization of a Classical Stamping Progression by Modal Correction of Anisotropy Ears.

    Tue, 02/02/2010 - 16:02 — SomNambul
    Authors: Serge Samper, Y. Ledoux, H. Favreliere
    Subjects: Other
    Abstract

    This work is a development from the Inetforsmep European project. We proposed
    to realize a global optimization of a deep drawing industrial progression (made
    of several stages) for a cup manufacture. The objectives of the process were
    the thickness decrease and the geometrical parameters (especially the height).
    This paper improves on this previous work in the aim of mastering the contour
    error. From the optimal configuration, we expect to cut down the amount of the
    needed material and the number of forming operations.

  5. Inertial tolerancing and capability indices in an assembly production.

    Tue, 02/02/2010 - 16:02 — SomNambul
    Authors: Pierre-Antoine Adragna, Serge Samper, Maurice Pillet, Fabien Formosa
    Subjects: Other
    Abstract

    Traditional tolerancing considers the conformity of a batch when the batch
    satisfies the specifications. The characteristic is considered for itself and
    not according to its incidence in the assembly. Inertial tolerancing proposes
    another alternative of tolerancing in order to guarantee the final assembly
    characteristic. The inertia I2 = \sqrt{\delta^2 + \sigma^2} is not toleranced
    by a tolerance interval but by a scalar representing the maximum inertia that
    the characteristic should not exceed.

Math-arch

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