7. Financial aspects of tolerancing
It is accepted that 80% of the cost of a part is incurred during its design. The design office must have a budget of hours sufficient to :
carry out an in-depth functional analysis of the mechanism ;
inventory groups of functional surfaces;
rate each functional group internally (is each surface rated in terms of position, orientation, shape, surface state parameters and defined by its mechanical characteristics?
rate each functional group in relation to the others ;
ensure that the quotation is unambiguous;
ensure, during a project review with the other partners, that the specifications are realistic, particularly in terms of tolerances.
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Financial aspects of tolerancing
Conclusion
Bibliography
Articles
Standardization
In order to delve deeper into this subject, it seems essential to refer to current standards. They evolve rapidly, and new ones are regularly adopted. To keep abreast of developments, we recommend consulting the Afnor website, where a list of international, European and French standards is kept up to date.
- Geometric Product Specification (GPS) – Master plan. - CR ISO/TR 14638 - (oct. 1996)
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Websites
•Afnor website : http://www.afnor.fr
•ISO website : http://www.iso.ch
•Geometric tolerancing – F. SCHNEIDER IUFM de Lorraine, Université de Metz – [email protected]
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