MAE 2250 Update: 25-Mar-13

MAE 2250

CONTROLLING SPATIAL VARIABILITY in MECHANICAL DESIGN

( CONTROLLING SIZE, SHAPE, & POSITIONAL VARIABILITY …)

by

PROF. H. B. VOELCKER

1 – TRADITIONAL (PARAMETRIC) TOLERANCES

– ASSEMBLIES & GEOMETRIC TOLERANCES

MAE 2250 Update: 8-Apr-12

2.40"

1.50

"

1.25"

WEAK MODEL OF VARIABILITY

TWO OF THE UNCONTROLLABLE VARIATIONS

LIMITATIONS OF PARAMETRIC TOLERANCES

MAE 2250 Update: 25-Mar-13

MORE LIMITATIONS – LACK OF DEFINED PROCEDURES