Innovative design and experimental verification of cam shedding for high-speed looms

IF 6.2 2区 工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY alexandria engineering journal Pub Date : 2024-10-31 DOI:10.1016/j.aej.2024.10.096
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Abstract

For overcoming space limitations and load-bearing defects of traditional conjugate cam shedding on looms, a novel cam shedding system with double-shaft was developed by incorporating mechanism analysis, theoretical calculations, modeling and simulation, and experimental verification. The lifting motion of the heald frame is controlled by the cosine acceleration law, with MATLAB compiling the reverse program of the cam theoretical profile. A functional digital prototype is created in ADAMS/View using planar rod groups, gear transmission, and conjugate cam mechanism. The simulation results of considering yarn tension exhibited highly consistent swing arm and heald frame motion curves with numerical calculations, and the dynamic performance of the shedding system is affected by yarn tension, which leads to an increase in motor torque and acceleration oscillation in the low-frequency domain. Furthermore, an experimental proportional model was produced using 3D printing technology and tested for motion performance at varying rotational speeds, verifying the design's theoretical accuracy and practical feasibility, indicating that this mechanism runs smoothly and reliably in lifting and returning the heald frame by cam; meanwhile, the yarn deformation and shed characteristics are apparent, meeting the requirements of the shedding weaving process of plain fabric. The work in this paper effectively solves the problem of contact wear between the cam and rotor, which is conducive to design innovation and performance improvement of the conjugate cam shedding on high-speed looms.
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高速织机凸轮开口的创新设计和实验验证
为克服传统织机共轭凸轮开口的空间限制和承重缺陷,通过机理分析、理论计算、建模仿真和实验验证,开发了一种新型双轴凸轮开口系统。综框的升降运动由余弦加速度定律控制,MATLAB 编制了凸轮理论轮廓的反向程序。利用平面杆组、齿轮传动和共轭凸轮机构,在 ADAMS/View 中创建了功能数字原型。考虑到纱线张力的仿真结果表明,摆臂和综框运动曲线与数值计算结果高度一致,而且脱纱系统的动态性能受到纱线张力的影响,导致电机扭矩增加和低频域加速度振荡。此外,利用三维打印技术制作了实验比例模型,并测试了不同转速下的运动性能,验证了设计的理论准确性和实际可行性,表明该机构在通过凸轮提升和返回综框时运行平稳可靠,同时纱线变形和脱落特征明显,满足平纹织物脱落织造工艺的要求。本文的研究工作有效解决了凸轮与转子之间的接触磨损问题,有利于高速织机共轭凸轮开口装置的设计创新和性能提升。
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来源期刊
alexandria engineering journal
alexandria engineering journal Engineering-General Engineering
CiteScore
11.20
自引率
4.40%
发文量
1015
审稿时长
43 days
期刊介绍: Alexandria Engineering Journal is an international journal devoted to publishing high quality papers in the field of engineering and applied science. Alexandria Engineering Journal is cited in the Engineering Information Services (EIS) and the Chemical Abstracts (CA). The papers published in Alexandria Engineering Journal are grouped into five sections, according to the following classification: • Mechanical, Production, Marine and Textile Engineering • Electrical Engineering, Computer Science and Nuclear Engineering • Civil and Architecture Engineering • Chemical Engineering and Applied Sciences • Environmental Engineering
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