摘要
针对弧面凸轮廓面的多轴数控加工,在分析现有各种加工工艺方法,尤其是分析单侧面加工方法存在的不足的基础上,围绕减小加工得到的实际廓面与理论设计廓面的极差,提出一种以刀轴轨迹面与凸轮廓面等距曲面的极差最小为优化目标的弧面凸轮单侧面数控加工刀位数据计算的优化算法。所建立的刀位优化算法综合了不可展直纹面侧铣加工的两点偏置算法和三点偏置算法的优点。通过实例对各种单侧面刀轨规划算法进行加工误差综合对比分析,结果表明所建立的刀位计算优化算法正确有效,可显著减小编程误差,为进一步提高弧面凸轮单侧面加工精度和完善加工工艺奠定了扎实的理论基础。
As for the current multi-axis machining of the globoidal cam profile, the disadvantages of the present one-side machining method are mainly analyzed based on the analysis of various machining methods. With regard to the deviation reduction between the theoretical profile and the practical one, an optimized one-side machining cutter-location calculation algorithm is proposed, its objective is to minimize the deviation between the tool axis trajectory surface and the offset surface of theoretical cam profile. The advantages of double points offset algorithm and three points offset algorithm for flank milling non-developable ruled surface are integrated into this optimization algorithm for toolpaths planning. Comparative analysis of the theoretical errors is conducted by examples among the various one-side machining cutter-location calculation methods, the results show that the improved one-side machining method is correct and effective and cutting errors can be evidently reduced, and which lays a sturdy theoretical foundation for further improving the precision and perfecting the process of one-side machining of the globoidal cam.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2008年第11期277-282,共6页
Journal of Mechanical Engineering
基金
湖南省自科科学基金(07JJ6092)
湖南省科技厅(2008GK3072)
湖南省教育厅科研(07A071.06B094)资助项目。
关键词
弧面凸轮
单侧面数控加工
刀位优化
误差分析
Globoidal cams One-side NC machining Cutter location optimization Error analysis
