A CONTINUOUS TOLERANCE SYSTEM

This paper analyzes the current ISO tolerance systems (ISO 286-1(1) an d ISO 286-2(2)) and presents new formulas that allow the aggregation o f the tolerance system in a simple way. The approach used makes it pos sible to compute the tolerances in a continuous manner with respect to both dimension and grade of tolerance (quality). The results are alwa ys within the tolerances tabulated in the ISO 286-1(1) and 286-2(2) St andards. This continuous approach is suitable for optimization in desi gn and automation in tolerancing on computer-assisted design (CAD) sys tems. The paper proposes a tolerancing approach closer to the modern t olerancing philosophy as given by the Taguchi methods.