A flank correction methodology for a five-axis CNC gear profile grinding machine
A flank correction methodology for a five-axis CNC gear profile grinding machine
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DOI：
10.1016/j.mechmachtheory.2011.08.009
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发表时间：
2012
影响因子：
5.2
通讯作者：
Yi-Pei Shih;Shi-Duang Chen
中科院分区：
文献类型：
--
作者：
Yi-Pei Shih;Shi-Duang Chen
形磨是大尺寸齿轮加工中最常用的精加工工艺，具有精度高、效率高、修齿灵活等优点。从理论上讲，这种齿面地形修改是使用加载齿接触分析（LTCA）来计算的，它考虑了齿轮齿、轴和壳体的挠度。然而，在现有的齿形磨削方法中，这种地形修饰是困难的。为简化磨削齿面形貌的加工，在五轴数控齿形磨床上提出了一种基于自由度高阶修正的齿面修形磨削方法。将磨床的各轴表示为一个高阶多项式，并根据齿轮齿面地形法向偏差推导出多项式系数的灵敏度。根据多项式的灵敏度，通过调整多项式的系数，可以逼近理论齿面。以五轴数控齿形磨床加工的斜齿轮为例，对该方法的有效性进行了数值验证。
Form grinding is the most popular finishing process for large-size gear because of its high accuracy, efficiency, and flexibility in tooth flank modification. Theoretically, this tooth flank topographical modification is calculated using loaded tooth contact analysis (LTCA), which takes into account the gear tooth, shaft, and housing deflections. Such topographical modification, however, is difficult in the existing gear form grinding method. To simplify production of the ground tooth flank topography, this paper proposes a tooth flank modification grinding method with high-order correction based on the degrees of freedom in the five-axis computer numerical control (CNC) gear profile grinding machine. Each axis of the grinding machine is formulated as a high-order polynomial, and the sensitivity of the polynomial coefficient is derived based on the topographic normal deviation on the gear tooth flank. The ground tooth flank can be approximated to the theoretical tooth flank by adjusting the coefficients of the polynomials based on their sensitivity. We demonstrate the validity of this flank correction method numerically using a helical gear made by the five-axis CNC gear profile grinding machine.