Modeling and simulation of loop forming mechanism of computerized flat knitting machine based on UG NX/Motion

It is obvious that there is a technological gap between domestic made computerized flat knitting machines and foreign ones,and systematically theoretical analysis is deficient in China.For this reason,research on modeling of the loop forming mechanism of the computerized flat knitting machine is carried out in order to improve its all-round performance.A transient mechanic model of the loop forming mechanism was established to investigate the variation of the impact force in vertical direction between the cam and the master jack based on UG NX/Motion.Movement simulation of the loop forming mechanism was conducted based on UG NX analytical software and in order to improve the stability of the movement of the knitting needles,the variation of the master jack′s displacement,velocity,and acceleration was analyzed and related experiments were undertaken.It was found that the analytical results obtained by using finite element analysis agree with the actual values,confirming the correctness of the transient dynamics′ analysis of loop forming mechanism.This research has provided a theoretical basis for the design and optimization of computerized flat knitting machines.