氧化锆义齿铣削工艺参数优化及其加工实验

Optimization of milling process parameters of zirconia denture and its experiment

摘要:

为合理选择初次烧结氧化锆陶瓷义齿在铣削加工时的工艺参数以及加工路径规划方式，以提高加工效率及质量，建立以提高材料去除率和降低表面粗糙度为目标的函数，采用理想点法、最小偏差法和线性组合法，优化出精加工阶段的工艺参数；以磨牙冠表面加工为例，采用UG CAM系统规划刀具加工路径，粗加工采用型腔铣，精加工分别采用固定轴铣中的曲面铣削往复模式、区域铣削跟随周边模式及区域铣削往复模式3种规划方法. 实际加工结果对比表明：在相同工艺参数及刀具条件下，区域铣削往复模式规划方法加工得到的牙冠表面质量最好.

Abstract:

To determine the proper values of process parameters when milling the pre-sintering zirconia denture, the optimization calculation is made to increase the material removal rate and decrease the surface roughness by using the ideal point method, minimum deviation method and linear combination method in finish milling process. Taking molar crown upper surface milling as a project for finding the suitable tool path planning method, the path planning is made by UG CAM. The cavity milling following periphery planning method is used for the rough machining. The reciprocating mode of surface milling, following periphery mode of area milling and reciprocating mode of area milling is used for the finish machining. It is found that the better surface quality can be acquired by the method of reciprocating mode of area milling for finish machining according to the results and contrast of the experiment in the same optimization values of the process parameters and standard tools.