Patent ID: 6067720
Filing Date: 2000-05-30
Classification: G01B

Abstract:
A method for determining a torsional structure in the surface roughness of a finished solid or hollow cylindrical part, comprising:making a plurality of axially aligned test scores on a circumferential strip of a shaft journal, with a high axial measurement point density at different but exactly known circumferential and axial positions;printing individual local roughness profiles of the scores according to their axial and circumferential positions on the shaft journal corresponding to their locations in a close sequence next to one another, wherein a measuring chart is raised or elongated in the radial and axial directions and is shown upset in the circumferential direction; andshowing a primary topography that is distorted with different affinities relative to the individual roughness profiles but showing the microstructure of the surface of circumferential strip in three dimensions as viewed at an unwound angle.