PRECISION INSPECTION OF DEVIATIONS OF MACHINED SURFACES

The deviations of machined surfaces of high-precision mechanical compo nents are one of the major error items that affect the precision, and hence the performance, of the components. However, industrial standard s concerning profile deviations are still not available for many compo nents with curved surfaces, due to lack of accurate inspection and err or evaluation methods, although general purpose coordinate measuring m achines are widely available. Proposed in this paper are two such meth ods that detect and process surface form deviations using coordinate m easuring machines. Possible measurement error sources of these methods have been investigated and necessary remedies suggested. Both are see n to lead to higher inspection accuracy than the methods reported in t he literature. Experiments were designed and carried out to confirm an d illustrate the validity of these proposed methods.