基于虚拟样机的空间连杆引纬机构运动特性

Kinematic characteristics of spatial linkage weft insertion mechanism based on virtual prototype

针对剑杆加速度峰值过大导致纬纱起毛、断线问题,在剑道与滑块之间添加滚轮,以改进空间连杆机构的运动特性。分析滚动接触对剑杆加速度曲线的影响。通过建立空间连杆引纬机构的虚拟样机,在ADAMS中进行运动学分析,得出运动特性曲线。验证在剑道和滑块之间添加滚轮后,降低剑杆加速度曲线峰值的有效性,并对参数变化的剑道做静力学分析。结果表明:添加滚轮后的引纬机构剑杆的加速度曲线峰值降低了11.11%,应力降低了36%;剑道满足强度要求,符合设计要求。

In order to solve the problems of fluffing and thread breakage of the weft due to the large peak value of the rapier acceleration,adding a roller between the kendo and the slider to improve the kinematic characteristics of spatial linkage.The influence of rolling contact on the rapier acceleration curve was analyzed.By establishing a virtual prototype of a space link weft insertion mechanism and performing kinematics analysis in ADAMS to obtain a kinematic characteristic curve,and static analysis of kendo was made.The results show that the peak value of the acceleration curve of the rapier of the weft insertion mechanism after adding the roller is reduced by 11.11%and the stress is reduced by 36%.The kendo meets the strength requirements and the design requirements.