数控刻楦机加工的刀位计算

Calculation on the Milling Cutter Machining Position of Numerical Controlled Last Carving Machine

使用三维离散法造型技术描述鞋楦外轮廓表面 ,介绍了数控刻楦机的加工原理 ,对加工过程中的刀位点确定进行了详细的算法分析 .从空间解析几何的角度出发 ,为刻楦机建立了空间坐标系 ,推导出铣刀旋转包络面的空间方程 ,根据鞋楦加工特征提出最小距离法 ,并将其应用到鞋楦刀位点的计算中 ,最终加工出来的鞋楦精度和光洁度均达到常规制楦要求 .

On the basis of applying three dimensional discrete formative technology to describing last surface, working principle of numerical controlled last carving machine was briefly introduced. Then the algorithm of ascertaining milling cutter machining position during the machining process was analyzed in details.A three dimensional reference frame was established with the help of spatial analytic geometry and obtain the spatial equation of milling cutter rotary surface was obtained. According to last machining character, a new machining algorithm that is named Minimal Distance Method was used and is also used to calculate the milling cutter machining position. Finally, the glabrous degree of last made by us has reached the conventional demand.