IMProVe 2011 - Proceedings

Geometric Product Specification and Tolerancing
tolerances are represented in the dressing form in the digital model (drawing form) and
are not considered in the geometric model. Thus, the subject of this paper is to propose a
model of integration tolerances in the CAD model. Indeed, assemblies modelling on
configurations with defects are deduced from the tolerances. Thus, detection of the
impact of tolerances on assembling and operating constraints, at an early step of product
life cycle management, has become possible.
Keywords: CAD model, Geometric tolerancing, Dimensional tolerancing, Assembly with
defects.
Corresponding Author: Mehdi Tlija
Tel.: (+216) 97449055
e-mail: tlija.mehdi@yahoo.fr
Address: LGM, ENIM, université de Monastir, 5 Av. Ibn Eljazzar, 5019 Monastir, Tunisie.
The geometrical specification in concurrent product design
L. López (a), J. Cerqueiro (a), J. Pose (a)
(a) Universidade de Vigo (Spain)
Abstract:
In this paper, in the first place an analysis on the usual practices for the specification of
acceptable geometrical variability in functional geometrical features of parts is carried out,
and an interpretation on the ‘geometrical variability specification’ concept as introduced
by ISO standards is established. In the second place, a wider and more integrative
proposal for geometric specification is made, conceived as a concurrent process inside the
product design and development process itself, where all problems referring to
tolerancing-related information handling along the product life cycle are dealt with.
Keywords: Geometrical variability, Concurrent product design, ISO standards,
Tolerancing, Geometrical specification.
Corresponding Author: Luís López
Tel.: + 34 986 813942
Fax.: + 34 986 813644
e-mail: llopez@uvigo.es
Address: C/ Torrecedeira, nº86 - 36208 Vigo (Spain).
June 15 th – 17 th , 2011, Venice, Italy
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IMProVe 2011 - Proceedings