Eliminating the Needs for Local Coordinate Systems for the Analyses of Deformed Parts

Abstract

Measuring distorted parts automatically without local coordinate systems and manual

interaction using scanning and adaptive measurement templates. Larger deformations in the

range of the wall thickness or initial size of measurement area per geometry element.

Most use cases involve injection molding, 3DPrinting and sheet metal due to the larger

likelihood of warpage.

Any beginning production of new parts involves a complex quality analyses using first article

inspection (FAI) to analyze the shape, but also structural integrity of the part. The further off

the shape is, the more work needs to be invested in measuring the correct areas which can

lead to totally manual workflows. CT and optical scanning allow an automatic method of

acquiring the whole shape of the part, but not to identify the to be measured features. An

adaptive measurement template allows for the first time to directly convert a measurement

plan onto distorted parts without manual intervention, saving 90% and more time for

measuring first articles.

By analyzing the deformation happening in space in order to morph the nominal shape and

the attached measurement template onto the very deformed first article, it is possible to find

the correct location for metrology features such as planes, cylinders, cones, spheres or

circles although the warpage is larger than the wall thickness of the part. This presentation

will show how GD&T information and defect analyses such as a porosity volume can be

seamlessly applied even to distorted articles.