【摘要】 将扫描线断面轮廓形状近似看作一段圆弧、以相邻扫描线重叠面积与凹沟面积相等为原则确定扫描线间距。对分区扫描和环形扫描两种扫描方式进行分析和比较,环形扫描方式明显减少激光光闸开关次数、系统稳定性和零件成形精度提高,但是相邻扫描线间浸润性差、沟壑较深,而分区扫描方式扫描间距稳定单一、浸润性好、沟壑较浅,但是激光光闸开关频繁、空跳次数较多。改进扫描方式,将变向分区扫描方式与环形扫描方式相结合加工出无缺陷、全密度金属功能零件。更多还原

【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.更多还原