Squareness Evaluation using Computational Geometric Approach

Abstract

Manufactured parts generally deviate from their intended shapes due to systematic and/or random errors during manufacturing. These geometric errors can affect the functioning of the parts significantly. In the present work, evaluation of squareness using computational geometric approach is attempted. In order to evaluate the squareness between two edges, coordinate data obtained from a CMM has been used. The present method based on computational geometric principles is found to be yielding better results than that of usually employed least-squares method. Hence the present method can be implemented in CMMs in order to reduce the rejection of good parts during inspection.