Method for non-destructive characterisation of the state of a workpiece surface

摘要

The process forms a preliminary impression of the surface to be examined using a primary elastomer material in the form of a paste which forms a mould after hardening. A second impression is made by using the mould to form a casting with a second elastomer having a fine consistency allowing the reproduction of surface features with a precision of a few tens of microns. A laser profile meter can be used to measure the surface roughness of the casting thus produced. <IMAGE>