Design And Mechanism Optimization Of Weft Insertion System For Multi-rapier Looms

As an important weaving equipment of conveyor belt with core,the rapid development of its technology has promoted the development of mineral conveying industry.The conveyor belt occupies a large share in the cost of conveyor.At present,there is a surplus of low-end conveyor belt in China,while high quality and high performance conveyor belts need to be imported in large quantities.Traditional cored looms are mostly single rapier looms,which have low weaving efficiency and low technical level.In view of the shortcomings and deficiencies of core-loom,multi-rapier stereo-loom is developed and designed,and the innovative design and optimization of weft insertion mechanism is emphasized.The main research contents and conclusions are as follows:(1)Through the analysis of the structure and weaving principle of traditional three-dimensional fabric with core,the weaving and performance requirements of high-performance three-dimensional fabric are obtained.According to the weaving and performance requirements of the fabric,a five-rapier filling insertion scheme and a set of tension compensation device which can realize the uniform tension of the five layers of filling yarn are designed,so that the weaving efficiency and fabric quality can be significantly improved.(2)The weft insertion mechanism of multi-rapier loom is studied in detail.At first,the principle and structure design of five rapier weft insertion are carried out.In order to improve the reliability of filling insertion and reduce the friction between the rapier and the warp yarn,the free vibration analysis and natural frequency calculation of the rapier are carried out.Through ANSYS finite element analysis software,the rapier is statically analyzed,and its modal analysis is carried out,and the first 6 natural frequencies are obtained.The response surface method is used to optimize the rapier,and the deformation and mass of the rapier are reduced.(3)Based on the collision theory,the simulation calculation of the rapier is carried out through ADAMS platform,and the longitudinal displacement of the rapier head is obtained in the course of filling insertion,and the rapier vibration is obtained within the allowed range.By optimizing the rapier,the deformation of the rapier is reduced and the reliability of filling insertion is improved.(4)In order to solve the unevenness of multi-layer weft tension during filling insertion and improve fabric structure performance,an innovative tension compensation device for multi-layer weft was designed and the mechanism was designed.According to the tension compensation device,establishes the mathematical model of tension compensation of weft tension simulation is carried out with MATLAB,the simulation results show that the tension compensation device can make the five layers of weft tension to achieve consistently,through the ADAMS platform of swinging rod CAM mechanism has carried on the kinematics simulation,the simulation results show that the tension in the process of compensation,smooth swinging rod movement,weft tension changes smoothly.This article in view of the shortcomings and the insufficiency of the single rapier weft insertion,designed five rapier weft insertion mechanism,and the five rapier weft insertion mechanism has carried on the simulation analysis and optimization design,for multilayer weft layers of weft tension compensator is designed,and has carried on the simulation and analysis,the results showed that five rapier weft insertion strong reliability can meet the needs of the three-dimensional fabric weaving belt core.