Computer simulating on the loom's four-bar beating-up mechanism with joint clearance

摘要

This paper intends to research the influence of the joint clearance in connecting rods pin on beating-up motion of loom. 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 the 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.