磨牙冠高速精加工优化刀轨生成算法的实现

Realization of Algorithm on Finishing Optimization-Tool-Path Generation for High-speed Machining Molar Crown

磨牙冠不仅微小、壁薄,而且外形极其复杂,尤其面尖嵴窝个性化特点明显,采用传统加工工艺很难快速、精确地加工出修复体外形。为高效地加工出磨牙冠,我们提出了基于顶点的STL数据模型快速等距算法。应用行切法、小刀具,实现了微径高速铣削精加工刀轨的生成。利用米克朗UCP800高速加工中心,成功地加工出了铝合金磨牙全冠。经综合测试表明,该算法运算速度快,生成加工刀轨数据量小,加工平稳性好。

Molar crown is very small and has not only thin-wall, but also complex profile; especially, the occlusal surface of each molar crown has many cusps, ridges and fossae being differently distributed. When conventional processing method is used, it is impossible to machine molar prosthesis rapidly and exactly. To enhance machining velocity and improve the surface precision of molar crown, an algorithm of entity rapid offset-based STL format is put forward. By the application of Zigzag tootpath planning and micro-machining cutter, the finishing toolpaths for high speed milling molar prosthesis are generated. In terms of Mikron UCP800 high-speed machine center, the molar all-crown made of alloy aluminum material is successfully machined. The test results show that the algorithm of toolpath generation works fast, the number of toolpaths is small, and the cutter feeds smoothly.