Part-geometry independent real time closed loop weld pool temperature control system for multi-layer DMD process
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United States of America Patent
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Nov 4, 2014
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app pub date -
Aug 28, 2003
filing date -
Aug 28, 2002
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Abstract
In a direct metal deposition system which builds up a metallic overlay on a substrate by moving the substrate relative to a laser in a metallic powder feed, the laser power is adjusted for successive layers by sensing the weld pool in a plurality of selected points in each layer and adjusting the power during successive layers to maintain a weld pool that corresponds to those achieved during deposition of a lower optimal layer. This compensates for heating of the substrate resulting from the deposition which tends to increase the pool size or temperature in the higher layers.
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