快速成型中保留模型特征的分层算法研究

Research on slicing algorithm to keep model features in rapid prototyping

在快速成型领域,一般分层算法不考虑模型特征,这可能会导致一些重要特征的丢失或偏移。针对此问题,在充分研究现有分层算法的基础上,提出一种保留模型特征的分层算法。该分层算法首先对STL模型三角面片进行预处理排序,然后以自适应分层算法确定分层厚度,最后对特征进行识别,针对不同特征进行不同处理来调整分层厚度,使分层厚度考虑到加工层厚引起的误差,从而可以保证成型件特征位置的准确。通过实验验证,该分层算法可以精确地识别特征,合理地确定分层厚度,具有一定的参考价值。

In the field of rapid prototyping, the general slicing algorithm does not take into account the features of the model, which may cause the loss or offset of some important features. Aiming to solve this problem, on the basis of fully studying the existing slicing algorithm,a slicing algorithm which can keep model features is proposed. In this algorithm, first, the triangle faces of the STL model is sorted in the pretreatment. Then, the layer thickness is determined by the adaptive slicing algorithm. Finally, the feature is identified and the thickness is adjusted according to the different features, so that the error caused by the thickness of the processing layer is taken into consideration and the accurate feature position of the forming part can be ensured. It is proved by experiments that the slicing algorithm can identify the features accurately and determine the layer thickness reasonably, therefore ,it has a certain reference value.