碳纤维多层立体织物平行打纬构型的设计建模与仿真  

Design modeling and simulation of parallel beating-up mechanism used for carbon fiber multilayer three-dimensional fabrics

作　　者：邱海飞[1] 焉瑞安 QIU Haifei;YAN Rui'an(School of Mechanical Engineering,Xijing University,Xi'an 710123,China;Rieter China Textile Instruments Co.,Ltd.,Changzhou 213022,China)

机构地区：[1]西京学院机械工程学院,西安710123 [2]立达(中国)纺织仪器有限公司,江苏常州213022

出　　处：《现代纺织技术》2024年第9期108-116,共9页Advanced Textile Technology

基　　金：陕西省教育厅专项科研计划资助项目(15JK2177);西京学院高层次人才专项基金资助项目(XJ20B09);西京学院横向课题资助项目(2018b10002001389)。

摘　　要：为提升碳纤维立体织物各层打纬力分布的均匀性,通过机构串联对共轭凸轮与平面四连杆进行功能配置,设计了一种适用于多层立体织造的组合式平行打纬构型。根据修正梯形加速运动规律,在Matlab环境中对主、副凸轮理论廓线进行数值分析与编程反求,提出了适用于多层立体织物的打纬阻力计算方法,构建了基于Adams/View的高精度平行打纬系统数字化仿真模型,并针对其运动特性、共轭精度及接触碰撞等进行了动态模拟与分析。结果显示:钢筘在前死心位置(凸轮轴转角为72°时)附近能够很好地实现水平打纬运动;摇轴与摆臂具有较高的角运动匹配精度,且两者负角加速度在前死心处均达到瞬时最大,有利于同步打紧各层纬纱;当凸轮机构存在共轭间隙时,摇轴角位移、角加速度会产生明显的偏离与振荡,同时主、副凸轮与滚子之间亦存在高频次接触和碰撞,并将导致摇轴与筘座发生振动,不利于提升平行打纬动力精度。文章为高品质多层立体织物打纬构型的设计与应用提供了借鉴。Multiple weft yarns are arranged in shuttles at different heights during the formation of three-dimensional carbon fiber fabrics.To ensure that each layer of weft yarns can withstand a uniform beating-up force,the reed must move horizontally in the front dead center,simultaneously feeding each layer of weft yarn into the weaving mouth.Traditional beating-up methods,such as linkage and conjugate cam mechanisms,cannot meet the requirements of multi-layer three-dimensional fabric weaving technology because they can only achieve circular arc trajectory movement of the reed.To solve the problem of uniform force on each layer of weft yarns in three-dimensional fabrics,this paper proposed a parallel beating-up mechanism composed of a conjugate cam and a planar linkage.In this paper,through an analysis of the form and mechanism principle of beating-up,a modified trapezoidal acceleration motion law was applied to the parallel beating-up of a reed.A reverse design program was compiled in the Matlab environment for the swing arm motion law and the conjugate cam theoretical profile.The Step function was used to simulate the beating-up resistance caused by multi-layer three-dimensional fabrics,and a functional prototype simulation model of the parallel beating-up system was constructed by Adams/View software.The kinematic and dynamic performance of the system were simulated and analyzed,taking into account factors such as beating-up resistance,contact collision,and conjugate clearance.A parallel beating-up mechanism suitable for multi-layer three-dimensional fabrics was developed by effectively connecting conjugate cam and planar linkages through mechanism combination.A calculation method and simulation idea for the beating-up resistance of multi-layer three-dimensional fabrics were also proposed.It is found that near the front dead center,the angular acceleration of the rocker shaft reaches its maximum,and the reed undergoes stable horizontal motion along the X direction,which can well meet the requirements of parallel beati

关 键 词：碳纤维 钢筘 共轭凸轮 平行打纬 共轭间隙 立体织物 打纬阻力 

分 类 号：TS103.134[轻工技术与工程—纺织工程] TH112.2[轻工技术与工程—纺织科学与工程]