含间隙和尺寸误差空间连杆引纬机构运动精度综合分析  

Comprehensive analysis of motion accuracy for spatial linkage weft insertion mechanism with clearance and dimensional errors

作　　者：张雷[1] 贺虎[1] 孔佳元 

机构地区：[1]浙江理工大学机械与自动控制学院,浙江杭州310018

出　　处：《纺织学报》2016年第6期124-129,135,共7页Journal of Textile Research

基　　金：国家自然科学基金(51175475);浙江省自然科学基金(LY14E050027)

摘　　要：为分析间隙和尺寸误差对引纬机构运动精度的影响,详细介绍了非连续接触模型和等效杆长理论的使用方法,针对空间连杆引纬机构中的空间四杆机构和平面四杆机构,在考虑制造误差和磨损或装配间隙的情况下,以概率分析方法和非连续接触理论为基础建立了运动学模型。运用Mat Lab的计算和仿真模块进行运动仿真,得出了相关曲线。详尽分析了机构的尺寸误差和间隙对整个机构运动输出的影响,在考虑构件误差和间隙影响时,剑头的输出误差比单独考虑1种影响因素时明显,且误差最大值都出现在速度的极大值点附近,可见间隙和构件误差对高速机构的影响尤为显著,此研究结果可为后续对空间连杆引纬机构的运动精度分析提供参考。In order to analyze the effect of clearance and dimensional errors of weft insertion motion accuracy,non continual-contacting model and the equivalent length theory are introduced in this article.Considering the manufacturing error and the wear or assembly clearance,kinetic models are established for the spatial four-bar mechanism and the planar four-bar mechanism of the spatial linkage weft insertion mechanism based on the probabilistic analysis method and non-continual contacting theory. The movement simulation is carried out by the calculation and simulation module of Mat Lab to obtain a related curve. The influence of size error and clearance to the mechanism motion output is analyzed in detail.When considering the component error and clearance between the kinematic pair,the output error of sword head is more obvious than considering a factor only,the maxima error is near the maximum point of the speed,which indicates that the influence of clearance and component error in high-speed mechanism is particularly serious. The results of this study can provide reference for the research of motion accuracy of spatial four bar weft insertion mechanism.

关 键 词：引纬机构 非连续接触模型 间隙 等效杆长理论 尺寸误差 

分 类 号：TS103.33[轻工技术与工程—纺织工程]