间隔织物用钢筘运动路径规划及驱动机构设计  

Motion path planning and driving mechanism design of reed for spacer fabrics

作　　者：袁汝旺[1,2] 张鹏 YUAN Ruwang;ZHANG Peng(School of Mechanical Engineering,Tiangong University,Tianjin300387,China;Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology,Tiangong University,Tianjin300387,China)

机构地区：[1]天津工业大学机械工程学院,天津300387 [2]天津工业大学天津市现代机电装备技术重点实验室,天津300387

出　　处：《纺织学报》2023年第10期172-180,共9页Journal of Textile Research

基　　金：天津市自然科学基金项目(18JCYBJC20200);中国纺织工业联合会应用基础研究项目(J202003)。

摘　　要：为满足间隔织物打纬过程中钢筘运动轨迹和动态特性等需求,基于凸轮连杆组合机构研究钢筘运动路径规划、驱动机构设计及动态特性控制方法。建立基于刚体导引的钢筘驱动机构设计模型及基于傅里叶级数的钢筘运动特性控制模型,设计并仿真验证钢筘运动路径及其运动特性。结果表明:摇杆初始角位移是决定钢筘运动路径的重要参数,设计5组不同参数的钢筘驱动机构均可实现钢筘平行打纬,最小轨迹误差率为0.02%;构建的凸轮从动运动规律可平稳控制钢筘沿其运动路径往复运动,且在钢筘运动启停阶段有50°的近似静止时间,可增加开口角和引纬角,有利于提高织机转速和满足幅宽需求;调节负向加速度峰值可获得不同惯性打纬力,为打纬机构参数化设计提供理论参考。Objective The traditional beating-up forms include the uses of four-lever and six-lever mechanism systems as well as conjugate cam.The reed swings around the rocking shaft reciprocally during the beating-up process,and cannot ensure the consistency of the upper and lower weft yarns during the fabric formation stage,thus leading to uneven weft density of the upper and lower surface layers of the spacer fabric.This produces width barrier defects and reduces the quality of the formed spacer fabric.A combined type of beating-up mechanism is applied to meet the weaving requirements of spacer fabrics,specifically to meet the requirements of reed movement trajectory and dynamic characteristics in the beating-up process.Method A beating-up mechanism combining a conjugate cam and a four-lever mechanism was worked.The movement path of the reed during the beating-up process was planned from the demand of the beating-up,and the rigid-body guiding method is used to establish the design model of the reed driving mechanism.Based on the Fourier series form,the control model of the motion characteristics of the reed was established.According to the movement law of the reed,the conjugate cam contour was able to be designed,and the complex vector method was used to verify the movement path of the reed and its movement characteristics.Results The initial angular displacement of rocker was found an important parameter to determine the motion path of the reed.Five sets of reed drive mechanisms with different parameters were designed to achieve parallel beating-up of the reed,in which the minimum trajectory error rate is 0.02%and the minimum angular error of the reed is 1.384°.The mechanism dimensional parameters were optimized in terms of reed angle error and reed trajectory error rate(Tab.4).The constructed cam follower motion law was continuous and high order derivable,which effectively avoided rigid and flexible impact of the mechanism.The motion law can smoothly control the reciprocating motion of the reed along its motion path,a

关 键 词：间隔织物 钢筘 运动路径规划 驱动机构 动态特性控制 打纬机构 

分 类 号：TS103.135[轻工技术与工程—纺织工程]