發(fā)布時間：2018-01-16 11:42

  本文關鍵詞：涂布膜自動換卷張力控制研究與實現(xiàn)　出處：《江南大學》2016年碩士論文　論文類型：學位論文

  更多相關文章： 涂布膜 制造工藝 涂布生產線 自動換卷 張力控制

【摘要】：涂布膜是高性能薄膜的重要分支和發(fā)展方向。涂布膜的發(fā)明使得加工過薄膜的屬性相對于原有屬性得到改善和加強,其生產加工過程需要經過涂布復合等生產工序。涂布生產線就是在薄膜加工過程中,將含有特定配比的涂布液通過狹縫涂布的方式噴涂在薄膜上,經過烘箱烘干后卷取成型的集成型生產系統(tǒng)。涂布膜生產過程中的張力與涂布工藝決定了成品薄膜的品質。整個涂布生產過程中,生產線上基材張力的控制需要貫穿整個生產環(huán)節(jié)。張力波動會影響薄膜在涂布復合等加工過程中的生產質量,張力的穩(wěn)定性是涂布膜成品合格率的重要影響因素。如果張力過大將會導致基材彈性過度形變甚至崩斷,張力過小又會使材料變厚甚至松散,影響導致薄膜堆積不利于生產。在涂布膜的生產時,可靠且精度高的張力控制系統(tǒng)可以提高產品質量和生產效率。目前,國內尚未普及應用卷對卷自動換卷涂布生產線,傳統(tǒng)的涂布薄膜生產技術與先進的涂布技術相比,生產效率相對較低且成本較高。本文在分析涂布膜生產線生產加工的工藝流程的基礎上,研究卷對卷不停機換卷的流程與控制技術,采用一種復合型的張力控制策略去保證在自動換卷過程中的張力的穩(wěn)定性。系統(tǒng)通過建立收卷時張力控制的數(shù)學模型,分析張力控制過程中每個變量的傳遞函數(shù)關系。根據(jù)傳遞函數(shù)關系,設計了轉矩控制器、速度控制器和張力控制器。針對收卷過程中,收卷的轉動慣量和轉徑變化導致傳遞函數(shù)的參數(shù)發(fā)生變化,采用自適應控制的方法,保證經過校正后的系統(tǒng)在整個放卷過程中有最佳的響應結果。在自動換卷時,換卷電機的速度量對系統(tǒng)的速度輸入產生擾動,通過前饋控制去消除擾動,使自動換卷過程時張力控制依然平穩(wěn)。最后,設計實用的涂布膜自動換卷張力控制系統(tǒng),當滿足生產線速度為120m/min、涂布膜幅寬為1m的生產過程時,穩(wěn)態(tài)張力波動低于±1%,且自動換卷時最大動態(tài)張力波動僅在±10%范圍內。新系統(tǒng)動態(tài)性能與穩(wěn)態(tài)精度均滿足生產工藝要求。
[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 鹵1%. The maximum dynamic tension fluctuation is only within 鹵10%. The dynamic performance and steady-state precision of the new system meet the requirements of production process.
【學位授予單位】：江南大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TB383.2
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本文編號：1432922