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Abstract: Regarding the scanning line section outline as an arc of
circle and according to the principle of the adjacent scanning line
overlap area equals to the groove area, the scanning line spacing is
determined. The subarea-scanning mode and the loop-scanning mode are
analyzed and compared. In the loop-scanning mode the laser light gate
on-off frequency is obviously reduced and the system stability and the
part shape precision are improved but the adjacent scanning line
infiltration is badly and the gully is deep. In the subarea-scanning
mode the scanning line spacing is stable and single and the infiltration
is better and the gully is shallow but the light gate moving is frequent
and the skip time is more. The scanning mode is improved. Through
combining the subarea-scanning and loop-scanning a flawless and full
density metal function part is fabricated.
Key words: Rapid prototyping Metal powder laser shaping Scanning
mode Metal function part
CLC No: TB115
TH15 TP13
国家863高科技资助项目(2002AA420060).
Received 20040706, received in revised form 20041125
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