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Abstract: The
scanning mode is a key technology in the laser metal deposition shaping
(LMDS) fabrication process. On the basis of analysis of the existing
scanning mode and its influence on the fabrication efficiency and
quality of the parts, some disadvantages of the existing scanning mode
are pointed out. A kind of subarea-parallel scanning mode for LMDS basic
on subdividing profiled outline into monotonous polygon subareas is
presented. On the basis of the principle of extreme point visibility,
inner loops are eliminated, and simple polygons are sub-divided into
monotonous polygons with the minimal zones. Parallel scanning paths with
adaptive scan space of all monotonous polygon subareas are finished,
which diminishes the length of scanning line, and ensures uniform and
compact fill-ing scan. Practical application shows that the scanning
mode can enhance the fabrication efficiency and quality.
Key words: Laser metal deposition shaping Point visibility
Monotonous polygon Subarea-parallel scan
CLC No: TP391
国家863高科技(2001AA421160)和 辽宁省自然科学基金(L050210)资
助项目. Received 20051220, received in revised form 20060512
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