基于剃齿啮合传动特性的剃齿刀优化设计

针对剃齿齿形“中凹”误差问题，构建了剃齿啮合分析模型，研究不同重合度对剃齿啮合传动特性的影响，以此提出一种剃齿刀优化设计方法。通过剃齿试验得出不同重合度的剃齿啮合传动特性对齿形“中凹”误差的影响规律，从而验证剃齿刀优化设计方法的正确性。结果表明 :适当的增大重合度能一定程度上减小剃齿啮合传动误差和瞬时传动比的曲线幅值，但继续增大会导致曲线局部振荡，使得传动更加不平稳，形成明显的齿形“中凹”误差；不同重合度的剃齿啮合状态引起的接触变形才是影响剃齿传动性能的主要因素；剃齿啮合传动性能越好，工件齿轮形状偏差及总偏差也越小；基于剃齿啮合传动特性的剃齿刀优化设计能有效地减小齿形“中凹”误差。 

Optimal design of shaving cutter based on gear shaving mesh transmission characteristic

For the tooth profile “concave” errors in shaving, a gear shaving mesh analysis model was established to study the gear shaving mesh transmission characteristic with different contact ratios. An optimal design of shaving cutter was proposed. The impact of gear shaving mesh transmission characteristic with different contact ratios on “concave” error was obtained by shaving experiment. And the correctness of the optimal design was verified. Results showed that: increasing the contact ratio can decrease the curve amplitude of transmission error and instantaneous ratio, but excessive increase led to local oscillation of curve and unstable drive. Thus the “concave” error was formed significantly. The contact deformation caused by gear shaving mesh status with different contact-ratios was the main factor affecting the gear shaving mesh characteristic. The better gear shaving mesh transmission characteristic meant the smaller shape and total deviation of gear gets. The optimal design of shaving cutter based on gear shaving mesh transmission characteristic can reduce the “concave” error effectively.