摘要
为了解决CAD模型转换成STL模型时出现误差、均匀切片时加工时间和表面质量难以协调的问题,提出了自适应的直接切片算法。该算法调用商用软件中切片函数对模型直接切片,切片厚度选择采用自适应切片方法。首先求出能够表示模型垂直方向轮廓变化情况的参考曲线,然后在切片时根据参考曲线上各点处切线确定在该处的切片厚度。使用该算法避免了用三角面片逼近CAD模型时的误差,而且根据参考曲线上点的切线决定切片的厚度,不需要试切,在保证模型表面精度的同时提高了成型效率。
Data error may be created from CAD model to STL model. It is hard that the operating time of uniform slicing coordinate with surface quality. In order to resolve these solutions, an adaptive direct slicing algorithm is proposed. The algorithm calls slicing function of commercial software to directly slice the model. The slicing thickness is variable. The algorithm firstly determines reference curves that can express vertical outline change of the model, and then select slicing thickness according to tangent of points in reference curves. This algorithm can avoid error that is created when triangle facets approximates CAD model. In addition, slicing thickness is decided by tangent of points in reference curves and needn＇t try to slice. This algorithm can insure precision of model surface and enhance modeling efficiency in the mean time.
出处
《计算机工程与设计》
CSCD
北大核心
2008年第8期2075-2077,共3页
Computer Engineering and Design
基金
山西省青年科技研究基金项目(2006021006)
中北大学校青年基金项目(2006)
关键词
快速成型
直接切片
自适应算法
切线
参考曲线
rapid prototyping
direct slicing
adaptive algorithm
tangent
reference curve
