Design Of Multi-eye Loom And Study Of Warp Tension Control

As an important part of composite materials,three-dimensional woven fabrics not only serve as excellent three-dimensional composite reinforcement,but also have excellent direct use value,which is due to the excellent mechanical properties,chemical properties and diversity of three-dimensional woven fabrics.However,a large number of research results show that the traditional two-dimensional loom weaving high-thickness three-dimensional fabrics have warp wear,can weave three-dimensional fabrics less variety,insufficient warp,unclear openings,wefting force is not enough to meet the demand of materials technology for its mechanical properties,chemical properties and other problems.The existing new three-dimensional loom has problems such as low automation and uneven warp tension,which greatly limit the application and popularity of three-dimensional fabrics.For the above-mentioned problems about two-dimensional loom weaving three-dimensional fabrics and the new three-dimensional loom exist.Based on the research of traditional two-dimensional looms and new three-dimensional looms,a multi-eye loom for automatic production of three-dimensional fabrics is developed in this paper.The structure of this multi-eye loom is similar to a two-dimensional loom in that it consists of five main motion mechanisms,but the operation and function of each mechanism are different from those of a traditional two-dimensional loom.In this paper,we modeled and virtually assembled the five main motion mechanisms of the multi-eye loom based on Solidworks,and provided a general assembly diagram of the multi-eye loom,aiming to provide a feasible design solution for the multi-eye loom.The problems of large number of warp yarns,high warp density and complex warp system are the causes of uneven warp tension in the multi-eye loom,which in turn leads to warp breakage and yarn wear during the weaving process,so this paper analyzes the effect of each motion mechanism on the warp tension of multi-eye looms on the basis of the effect of each motion mechanism on the warp tension of multi-eye looms.Except for the weft guiding mechanism,all the other four motion mechanisms have a direct influence on the warp tension of the multi-eye looms.Warp tension fluctuations can lead to warp elongation and slackening of the warp yarn,which is an important cause of warp breakage and defects during weaving.Based on this problem,this paper designs a multi-eye loom warp tension control device,based on solving the problem of warp yarn stress stretching and slackening during weaving.Finally,in order to further investigate the weaving ability of the multi-eye loom,this paper combines the structural characteristics of the multi-eye loom and the performance characteristics of the spacer fabric,draws the fabric organization structure of the three-layer spacer fabric with plain fabric on the face,and uses Solidworks to model the three-dimensional structure of the fabric.The opening sequence of the three-layer spacer fabric on the multi-eye loom was simulated during the weaving process,and the lifting diagram of the tissue was designed.