高速剑杆织机打纬机构运动精度可靠性分析与计算

摘要

The reliability, stability and kinematics accuracy of domestic high-speed rapier loom were urgent to be improved. Based on the kinematics accuracy models of conjugate cam in beating-up mechanism considering the three errors including dimension errors, clearances of hinged joints and cam surface wear error, the precise analytic equation for the solution of kinematics accuracy reliability of beating-up mechanism was established. And the simulation was carried out using Maple software. The influence of the major factors on kinematics accuracy reliability of high-speed conjugate cam beating-up mechanism was revealed systematically. The results show that the descending order of influence degree for the kinematics accuracy reliability of high-speed conjugate cam beating-up mechanism is cam surface wear error, dimension errors, clearances error of hinged joints. The specific measures of improving kinematics accuracy reliability of conjugate cam in beating-up mechanism are put forward.%针对国产高速剑杆织机可靠性、稳定性、运动精度等急待提高的难题，基于考虑基本尺寸误差、运动副间隙误差及凸轮副表面磨损误差时共轭凸轮打纬机构运动精度的3种计算模型，建立了打纬机构运动精度可靠性求解的精确解析方程式，并运用Maple数值分析软件进行了仿真计算，揭示了各主要误差因素对高速共轭凸轮打纬机构运动精度可靠性的影响规律。结果表明对高速共轭凸轮打纬机构运动精度可靠性影响程度由大到小依次为：凸轮副表面磨损误差、基本尺寸误差、运动副间隙误差，并提出了提高共轭凸轮打纬机构运动精度可靠性的具体措施。