组合曲面叶片的螺旋加工刀位轨迹生成

Spiral machining tool path generation for blade with compound surfaces

为提高叶片加工质量和改进现有螺旋加工方法,提出了一种新的针对组合曲面造型叶片的四轴螺旋加工方法。该方法在叶片曲面造型过程中,将叶片曲面分割为叶盆、叶背、前缘和后缘四个区域。根据组合曲面叶片造型,提出了组合曲面叶片螺旋加工刀位轨迹生成方法和切触点的计算公式。最后,基于UG软件平台,以二次开发方式编制了相应的数控编程模块,生成了连续光滑的叶片螺旋加工刀位轨迹。试验结果表明,该方法能够实现叶片的四坐标螺旋加工,并可有效提高叶片的加工质量。

To improve the blade machining quality and the existing spiral machining strategy, a novel four-axis spiral machining approach for blade with compound surfaces was presented. In the modeling processes, the blade surface was divided into four patches, namely the suction surface, the pressure surface, the leading and trailing edge sur- faces. Based on the Computer Aided Design （CAD） model of blade with compound surfaces, the spiral cutter contact points＇ calculation formula and machining tool path generation method were proposed. Finally, based on the UG software platform, the numerical control module was programmed by second development. And the smooth and continuous spriral machining tool path for blade was generated. Experimental result showed that the presented method could realize the four-axis spiral machining of blade and improve the blade machining quality.