摘要
针对非可展直纹面侧铣精加工刀轴矢量计算中存在的问题,基于侧铣加工误差几何模型分析了棒铣刀加工非可展直纹面误差的产生原因。在研究了两点偏置法和三点偏置法的基础上,围绕提高非可展直纹面类零件的加工精度,提出一种动点滑动并寻求最优的刀轴矢量计算方法,并且采用最小二乘法对刀位轨迹进一步优化。通过所建立的刀位优化算法得到的刀轴矢量可使加工误差在刀具与被加工曲面切触状态下趋于最小,最终得到整体最优的刀位轨迹。用所提方法与已有方法进行加工试验比较,并对加工误差分布进行分析可得,侧向偏置法所产生的加工误差明显低于已有方法,提高了加工精度。所采用的优化方法和数据处理结果可以为非可展直纹面侧铣加工提供一定的参考依据。
Aimed at the calculation problems of cutter axis vector in flank milling ofundevelopable ruled surface,the mechanism of machining error of undevelopable ruled surface based on the geometrical error mode is analyzed.To improve the machining precision of undevelopable ruled surface,an optimization method is established to obtain the optimal computational method of tool axis by studying of the double points offset and three points offset algorithms.In addition,based on the least-square method,the further optimization of tool path is proposed.With this method,the machining error in the contact zone of the tool and the machined surface can be minimized,and an overall optimization of tool path can be further generated.Experimental results show that the machining error related to the proposed method is significantly lower than that associated with the existing methods,and confirm the correctness and reliability of the method.The methods and data results provide a theoretical reference for the flank milling of undevelopable ruled surface.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2014年第9期136-141,共6页
Journal of Mechanical Engineering
基金
国家科技重大专项资助项目(2013ZX04011031)
关键词
侧铣
非可展直纹面
刀位优化
误差分析
flank milling
undevelopable ruled surface
cutter-location optimization
error analysis
