纬编针织机编织过程中三角振动响应特性  

Vibration response characteristics of cam in knitting process of weft knitting machine

作　　者：戴宁 梁汇江[3] 胡旭东 陆哲昊[1] 徐开心 袁嫣红 屠佳佳[1] 曾志发 DAI Ning;LIANG Huijiang;HU Xudong;LU Zhehao;XU Kaixin;YUAN Yanhong;TU Jiajia;ZENG Zhifa(Key Laboratory of Modern Textile Machinery&Technology of Zhejiang Province,Zhejiang Sci-Tech University,Hangzhou,Zhejiang310018,China;College of Textile Science and Engineering(International Institute of Silk),Zhejiang Sci-Tech University,Hangzhou,Zhejiang310018,China;Zhejiang Kangli Automation Technology Co.,Ltd.,Shaoxing,Zhejiang312500,China;Zhejiang Hengqiang Technology Co.,Ltd.,Hangzhou,Zhejiang310018,China)

机构地区：[1]浙江理工大学浙江省现代纺织装备技术重点实验室,浙江杭州310018 [2]浙江理工大学纺织科学与工程学院(国际丝绸学院),浙江杭州310018 [3]浙江康立自控科技有限公司,浙江绍兴312500 [4]浙江恒强科技股份有限公司,浙江杭州310018

出　　处：《纺织学报》2023年第10期181-187,共7页Journal of Textile Research

基　　金：浙江省博士后科研择优资助项目(ZJ2021038);浙江理工大学科研启动基金项目(23242083-Y);浙江省科技计划资助项目(2022C01065;2022C01202)。

摘　　要：纬编针织机编织过程中工作状态及故障的实时检测对提高其编织性能和稳定性具有重要意义,为解决单一品种执行器工作状态实时检测通用性差,无法保证纬编针织机终端控制环节准确等问题,结合纬编针织机编织过程中织针与三角的动作工艺,搭建其编织过程三角振动响应特性测试平台,得到在不同转速和不同针法下三角振动响应特性(振幅、频率)与转速、出针方式的数学关系。结果表明,测试平台可适用于各品种纬编设备,且可从设备的控制终端——织针的出针方式实现其编织过程中工作状态及故障的实时检测,对从振动层面提高纬编针织机稳定性具有一定借鉴意义。Objective The existing research primarily focuses on real⁃time detection of the working status of a single species of actuator,resulting in poor generality and inability to ensure the accuracy of the terminal control process in the weft knitting machine.This study investigates the forced motion characteristics between knitting needles and cam during the knitting process,providing theoretical and experimental evidence for the real⁃time detection of the working status and faults in the weft knitting equipment from a vibration perspective.Method Combining the actual weaving process of the weft knitting machine,which involves the knitting needle impacting the cam and undergoing forced motion along the cam track,a testing platform was designed to investigate the vibration response characteristics of the cam during the weaving process.PZT(piezoelectric ceramic)was attached to the surface of the piezoelectric cam,creating a′cam+PZT′coupling system.Vibration characteristic curves of the coupling system were obtained at different rotational speeds and knitting techniques.Results The vibration characteristics(amplitude,frequency)under different rotational speeds and knitting techniques,as well as their mathematical relationship with the rotational speed and needle selection method,yield the following three results for fault diagnosis and online detection of weft knitting equipment from a vibration perspective.Firstly,the moment when the knitting needle strikes the cam,the vibration signal experiences a rapid increase in amplitude,reaching its maximum value within a short timeframe(approximately 200 microseconds).The amplitude then gradually diminishes to zero.Importantly,the decay time period remains consistent and can be considered negligible compared to the needle selection cycle.This finding holds true irrespective of the impact velocity(Fig.3).When the weft knitting machine is in the fully selected needle state,the needle selection frequency is equal to the vibration frequency detected by the"cam+PZT"coupling s

关 键 词：纬编针织机 三角 振动响应特性 故障诊断 

分 类 号：TS103.7[轻工技术与工程—纺织工程]