涂布膜自动换卷张力控制研究与实现

发布时间：2018-01-16 11:42

  本文关键词：涂布膜自动换卷张力控制研究与实现　出处：《江南大学》2016年硕士论文　论文类型：学位论文

  更多相关文章： 涂布膜 制造工艺 涂布生产线 自动换卷 张力控制

【摘要】：涂布膜是高性能薄膜的重要分支和发展方向。涂布膜的发明使得加工过薄膜的属性相对于原有属性得到改善和加强,其生产加工过程需要经过涂布复合等生产工序。涂布生产线就是在薄膜加工过程中,将含有特定配比的涂布液通过狭缝涂布的方式喷涂在薄膜上,经过烘箱烘干后卷取成型的集成型生产系统。涂布膜生产过程中的张力与涂布工艺决定了成品薄膜的品质。整个涂布生产过程中,生产线上基材张力的控制需要贯穿整个生产环节。张力波动会影响薄膜在涂布复合等加工过程中的生产质量,张力的稳定性是涂布膜成品合格率的重要影响因素。如果张力过大将会导致基材弹性过度形变甚至崩断,张力过小又会使材料变厚甚至松散,影响导致薄膜堆积不利于生产。在涂布膜的生产时,可靠且精度高的张力控制系统可以提高产品质量和生产效率。目前,国内尚未普及应用卷对卷自动换卷涂布生产线,传统的涂布薄膜生产技术与先进的涂布技术相比,生产效率相对较低且成本较高。本文在分析涂布膜生产线生产加工的工艺流程的基础上,研究卷对卷不停机换卷的流程与控制技术,采用一种复合型的张力控制策略去保证在自动换卷过程中的张力的稳定性。系统通过建立收卷时张力控制的数学模型,分析张力控制过程中每个变量的传递函数关系。根据传递函数关系,设计了转矩控制器、速度控制器和张力控制器。针对收卷过程中,收卷的转动惯量和转径变化导致传递函数的参数发生变化,采用自适应控制的方法,保证经过校正后的系统在整个放卷过程中有最佳的响应结果。在自动换卷时,换卷电机的速度量对系统的速度输入产生扰动,通过前馈控制去消除扰动,使自动换卷过程时张力控制依然平稳。最后,设计实用的涂布膜自动换卷张力控制系统,当满足生产线速度为120m/min、涂布膜幅宽为1m的生产过程时,稳态张力波动低于±1%,且自动换卷时最大动态张力波动仅在±10%范围内。新系统动态性能与稳态精度均满足生产工艺要求。
[Abstract]:Coating film is an important branch and development direction of high performance film. The invention of coating film makes the properties of processed film improved and strengthened relative to the original properties. Coating production line is in the process of film processing, the coating solution with a specific ratio is sprayed on the film by slit coating. The quality of finished film is determined by the tension and coating process in the process of coating film production, and the quality of finished film is determined during the whole process of coating production. The control of the substrate tension on the production line needs to run through the whole production link. The fluctuation of the tension will affect the production quality of the film in the process of coating and composite processing. The stability of tension is an important factor influencing the pass rate of coating film. If the tension is too large, it will lead to excessive deformation of the substrate and even breakage, and too small tension will make the material thicker or even loose. The effect of film accumulation is not conducive to production. In coating film production, reliable and high precision tension control system can improve product quality and production efficiency. In China, the application of automatic coiling changing production line has not been popularized, and the traditional coating film production technology is compared with the advanced coating technology. The production efficiency is relatively low and the cost is high. Based on the analysis of the production and processing process of the coating film production line, the paper studies the process and control technology of the coiling without stopping. A compound tension control strategy is adopted to ensure the stability of tension in the process of automatic rewinding. The mathematical model of tension control during winding is established. According to the transfer function, torque controller, speed controller and tension controller are designed. The change of the moment of inertia and the diameter of the take-up results in the change of the parameters of the transfer function, and the adaptive control method is adopted. It is ensured that the system after correction has the best response result in the whole unwinding process. In the automatic rewinding, the speed of the winder motor has disturbance to the system speed input, and the disturbance is eliminated by feedforward control. The tension control is still stable in the process of automatic coiling. Finally, a practical tension control system is designed, when the speed of production line is 120m / min. When the width of coating film is 1 m, the steady state tension fluctuates less than 卤1%. The maximum dynamic tension fluctuation is only within 卤10%. The dynamic performance and steady-state precision of the new system meet the requirements of production process.
【学位授予单位】：江南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TB383.2
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本文编号：1432922