3-DIMENSIONAL ANALYSIS OF SHEET SURFACES

A new three-dimensional surface analysis technique determines paramete rs that make it possible to ! describe the tribological behaviour of s heet surfaces during the forming process more precisely than before. T hese parameters include the bearing ratios of the solid contact areas, the static and dynamic lubricant pockets. A precondition for their de termination is the three-dimensional mapping of the topography by an o ptical measuring method. On the basis of numerous studies, a measureme nt specification has also been developed which ensures reliable determ ination of the parameters. A few examples demonstrate that the three-d imensional surface analysis technique differentiates descriptively bet ween the various sheet surfaces imf parted after skin-pass rolling wit h laser-textured and shot-blasted skin-pass rolls.