Monitoring the shape of castings, esp. turbine blocks - using optical scanning device which feeds any deviation signals to a subsequent machining device

摘要

Method of determining the shape and/or the deviations in shape of finished products, esp. castings, consists of locating the product in a definite position via reception points and optically scanning the contours of the product and thereby defining any deviations from the nominal shape. The measured data representing any changes is then fed to a CNC-controlled with system or a grinding robot to influence any further work to be carried out. To optimise the measured shape data, the product can be moved together with the support body in one or several steps about several axes under the control of a computer system. The recorded changes are obtained by comparing the actual product shape with a life size model or a 3-D flat model in a CAD system. USE/ADVANTAGE - Esp. for monitoring the shape of turbine blades. Method can be employed in a mass production line.