中文摘要：

采用单点金刚石切削的方法加工了KDP晶体，利用回归分析的方法建立了表面粗糙度预测模型，达到了在加工前设计、预测和控制表面粗糙度的目的。利用预测模型分析了进给量、切削速度、背吃刀量对表面粗糙度的影响。通过优化设计获得了KDP晶体在该条件下的最佳切削参数，得到的表面粗糙度的最佳估计值为6．3389nm。利用最佳的切削工艺参数，加工出了表面粗糙度值为6．895nm的超光滑表面。

英文摘要：

The method of single point diamond turning was used to machining KDP crystal. The predication model was established on the basis of regression analysis to predicate sureface roughness, which realize the purposes of pre-machining design, predication and control surface smoothness. The predication model is utilized to analyze the influences of feed, cutting speed and depth of cut on the surface roughness. The optimal cutting parameters of KDP crystal on such condition are acquired by optimum design. The optimum estimated value of surface roughness is 6. 3389nm. Using the optimal cutting parameters, the value of surface roughness 6. 895nm is acquired.