Automatic conttol fo an electron beam physical vapor deposition process

摘要

This paper presents an approach for the automatic control of an electron beam physical vapor deposition process (EBPVD). Images of the melt poor are analyzed on a block-by-block basis and a technique to identify critical regions of the melt pool, as designated by trained operators, is given. Simulation results demonstrate the feasibility of automating the electron beam steering function. In addition, methods to obtain input data describing the melt pool and the incorporation of this data into an overall control strategy that would insure the uniformity of coatings is presented.