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新型自动络筒机关键机构的分析与研究
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摘要
青岛宏大纺机作为我国自动络筒机的龙头生产企业,经过多年努力,已开发了具有自主知识产权的新型自动络筒机,初步实现了自动络筒机的数字化。但是新机还存在一些缺点,如筒子与槽筒之间的接触压力不恒定、换管时易出现漏管现象、络筒张力不够稳定、张力控制过程具有滞后性等,直接影响了筒子的质量。因此,本课题组与青岛宏大纺机合作,开展了新型自动络筒机关键机构的分析与研究。
     本文在总结国内外自动络筒机发展现状的基础上,对新型自动络筒机卷绕机构、自动换管机构以及张力控制系统进行了研究。
     卷绕机构方面,通过对卷绕机构传动理论、卷绕运动、筒子卷绕密度的深度剖析,完善了卷绕机构的传动理论,建立了卷绕机构的几何模型,推导了相关的关系方程,为卷绕机构参数的选择提供了理论依据,为获得高质量的筒子提供了保障。
     自动换管机构方面,通过对目前新机自动换管装置存在问题的分析,设计了一种管纱滑槽机构,利用虚拟样机技术对管纱滑槽机构实现机构设计和模拟仿真,并验证管纱滑槽机构的可行性,使自动换管装置得到优化改进,不仅降低了成本,也缩短了设计周期。
     张力控制系统方面,通过对新机电磁式张力混合控制系统的阐明,指出了现有张力控制系统的缺点,提出了一种张力闭环控制系统。该控制系统取消对槽筒的开环控制,用模糊控制方法取代传统的PID控制。运用Simulink对所设计的模糊控制系统进行仿真,并与传统PID控制系统进行比较,验证了张力闭环控制系统的可行性。
As a bibcock production enterprise of automatic winder, Qingdao Hongda textile machinery has been developed the new-style automatic winder with independent intellectual property rights under many years of hard working. At the same time, the preliminary numeralization was realized in this automatic winder. But there are still some shortcomings, such as the unconstant contact pressure of the bobbin and drum, the pretermission of the tubular yarn when exchanging, the unstable tension and tension control process associating with hysteretic nature. These shortcomings directly affect the quality of bobbin. Therefore, we with Qingdao Honda textile machinery carried out the analysis and research on the key mechanism of the new-style automatic winder.
     Based on the summaries of the present status and development of the automatic winder, the author has researched the winding mechanism, the automatic exchanger tubular yarn mechanism and tension controll system of the new-style automatic winder.
     On the basis of analyzing the winding transmission theory, the winding movement and winding density of bobbin, the author improved the winding transmission theory, established its geometrical model and derived the relation equations. This work could provide a theoretical basis when selecting the winding parameter and ensure the high quality bobbin.
     According to the analysis of the exchanger device of the automatic exchanger tubular yarn mechanism, the author developed a kind of tubular yarn slider mechanism, realized the design and simulation using virtual prototype technology, and verified the feasibility. It will optimize the mechanism, reduce the cost and short the design cycle.
     The shortcomings of the assolenoid style tension hybrid control system were summarised and then a kind of tension closed-loop control system was presented. The present system employs the fuzzy control method instead of the traditional PID control. In the meantime, the Simulink was applied to simulating the fuzzy control system, then the comparison with the traditional PID control was conducted, and finally the feasibility of the tension closed-loop control system was verified.
引文
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