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针对ZC3型蜗轮的数控加工问题,提出一种采用常规铣刀侧铣加工蜗轮的方法。首先,通过齿轮啮合原理推导出蜗轮副的数学模型。其次,通过MATLAB软件求解出蜗轮齿面离散数据点云,从蜗轮轴向截取多组截面数据,采用最小二乘拟合法拟合截取的数据点,求解出蜗轮齿面曲率变化的关系,并以此为依据,用非均匀刀路划分法对齿面进行刀路划分,生成相应的数控加工刀路轨迹。最后,用VERICUT软件对生成的加工程序进行仿真,并用原始计算的齿面数据与仿真加工的齿面进行对比分析,验证其正确性。试验表明,该方法与传统的蜗轮加工方法相比,具有很强的适应性;同时采用侧面铣削,提高了铣削加工效率。
Aiming at the problem of NC machining of ZC3 worm gear, a method of side milling the worm gear using conventional milling cutter is proposed. First, the mathematical model of worm gear is deduced by the gear meshing principle. Secondly, the discrete data point cloud of tooth surface of worm gear was solved by MATLAB software, multiple sets of cross-sectional data were taken from the axial direction of worm wheel, and the data points were fitted by the least squares fitting method to solve the relationship between the curvature change of worm gear tooth surface and This is based on the use of non-uniform knife-and-knife method of dividing the tooth surface to generate the corresponding CNC machining path. Finally, the generated machining program is simulated by VERICUT software, and the original calculated tooth surface data is compared with the simulated tooth surface to verify the correctness. Experiments show that this method has strong adaptability compared with the traditional worm gear machining method, and the side milling at the same time improves the milling efficiency.