Virtual prototype simulating of four-bar beating-up mechanism of loom with joint clearance

This study intends to research the influence of the joint clearance in connecting rod bin on beating-up motion.Based on the principle that the force in the bearing clearance is negative or zero means the pairing elements separate,the contact and collision in the bearing of the connecting rod bin is predicted.The kinetic pair with clearance is established by a continuous contact model,and the clearance between components is replaced by a rigid bar without mass.Virtual prototype model is established in Solidworks,and the kinematics and dynamics simulation is applied on it with COSMOSMotion.By analyzing the magnitude and direction of force loading on the clearance-bar,it is persuadable that the elements of the pair will separate and contact several times in a period of crank′s movement.Based on the kinetic analysis of the slay,it is noted that the components are affected by impact force under high speed conditions,which brings negative effect on the mechanism′s beating-up performance and fabric′s quality.