特细金属丝整经张力控制及装备研究

发布时间：2018-01-02 09:55

本文关键词：特细金属丝整经张力控制及装备研究　出处：《天津工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：高精细金属丝网主要应用于高精度过滤、电路印刷和智能应用,特细金属丝整经机应用于高精细金属丝网织造的整经环节。课题源于杭州恒益筛网有限公司委托开发特细金属丝整经机,从而进行高精细金属丝网开发。整经是将一定根数的经纱按规定的长度和宽度平行卷绕在经轴上,且保持一定张力的工艺过程,是重要的织前工艺。该公司原有金属丝整经设备无单丝张力控制,且筒子架容量小;无片纱张力精确控制机构,横移量无法精确控制,只能满足直径0.025mm及以上的金属丝整经。为了开发高精细金属丝网,尤其是直径0.02mm及以下机织金属丝网,需要开发特细金属丝整经机。本文在研究特细金属丝整经特点、整经工艺以及当前金属丝整经机不足的基础上,主要研究了特细金属丝整经中的单丝张力控制方式及筒子架结构,片纱张力控制算法及特细金属丝整经机研制。(1)单丝张力控制与筒子架结构:通过进行重锤摩擦盘式、重锤张力杆式及无单丝张力调节的单丝退绕对比试验,结果表明重锤摩擦盘式单丝张力控制方式比其他机械控制方式的单丝张力更加稳定,且可通过调节保证筒子架上任意位置上的纱管单丝退绕张力一致;针对筒子架容量大、对金属丝摩擦小的要求,采用了 V型错位对称结构的筒子架,减小金属丝在被聚拢前受到的摩擦力及转角,提高了容量;设计中使用电磁制动器对纱管随动轴制动,电磁制动器的响应时间为0.3s,实现了断线或停车时及时制动,避免纱管惯性退绕。(2)片纱张力控制算法:通过研究张力形成原理,在片纱张力控制系统中采用双闭环的控制,实现了恒线速度收卷和恒张力收卷。采用基于卡尔曼滤波的PID算法闭环控制收卷线速度。由于收卷过程中卷径不断变化,必须对收卷伺服电机变速控制。由编码器检测实时线速度,使用卡尔曼滤波器滤波,经过PID算法控制输出量大小,从而动态调整收卷伺服电机转速,此算法实现了恒线速度收卷。采用积分分离式PID算法闭环控制收卷张力。收卷张力控制响应必须具备准确性、稳定性,此外必须保证无超调量,避免对金属丝造成物理损伤。采用积分分离式PID算法,既保证了系统的灵敏度、准确度和稳定性,又使得系统输出无超调量,从而达到了恒张力无超调收卷目的。(3)结构设计及电气控制系统设计:设计制造了 500支纱管容量的筒子架和整经台。其中整经台包含聚拢机构,片纱张力控制机构,收卷机构,横移控制机构及分绞机构。通过筒子架和整经台的配合,实现了特细金属丝恒张力收卷,且单丝张力均匀,片纱张力恒定。
[Abstract]:High precision metal wire mesh is mainly used in high precision filtration, printed circuit and intelligent application, the super fine metal wire warping machine used in high precision metal wire mesh weaving warping process. Subject comes from Hangzhou Hengyi filter limited company commissioned the development of super fine metal wire warping machine, thus the high fine metal mesh whole development. Is a certain number of warp yarns according to the provisions of the length and width of parallel winding placed on the process, and maintain a certain tension, is an important process before weaving. The company's original wire warping equipment without filament tension control, and the creel capacity is small; no yarn tension control mechanism, shifting the amount cannot be controlled accurately, can only meet the diameter of 0.025mm and above the metal wire warping. In order to develop the high fine metal mesh, especially the diameter of 0.02mm and below the woven wire mesh, the need to develop super fine metal wire warping machine. The Wen Zaiyan The super fine metal wire warping characteristics, warping process and the wire warping machine on the basis of the shortage, mainly studies the filament tension control methods and structural characteristics of thin metal wire creels warping of the yarn tension control algorithm and super fine metal wire warping machine is developed. (1) monofilament tension control and creel structure by friction disc hammer, hammer rod and filament tension unwinding contrast test monofilament tension adjustment, results show that the friction disc weight monofilament tension control mode is more stable than single wire tension control methods of other machinery, and by adjusting the guarantee on the bobbin rack the bobbin unwinding tension wire in view of the creel; large capacity, small friction requirements on the wire, the creel V type dislocation symmetrical structure, reduce the wire in friction angle and gather all the pre, improve the design capacity; In the use of electromagnetic brake of bobbin servo shaft brake, electromagnetic brake response time is 0.3s, the disconnection or parking brake timely, avoid inertia. (2) unwinding bobbin yarn sheet tension control algorithm: through the study of the forming principle of tension, the double closed-loop control of the yarn tension control system, realizes the constant speed winding and constant tension winding by using PID algorithm. The closed-loop Calman filter control rewinding speed based on the line. Because the coil diameter changing winding process, must be on the winding servo motor speed control. By the encoder to measure the real-time line speed, using the filter Calman filter, through the PID algorithm to control the quantity of output thus, the dynamic adjustment of the rolling speed of servo motor, this algorithm realizes the constant line speed coiling. The rewinding tension is controlled by the integral separation PID algorithm. The closed-loop tension control response must have accuracy and stability In addition, qualitative, must ensure that no overshoot, avoid to cause physical damage to the wire. The integral separation PID algorithm, which ensures the system's sensitivity, accuracy and stability, but also makes the system output without overshoot, so as to achieve the constant tension winding without overshoot. (3) the structure design and the electrical control system design: 500 bobbin creel capacity and warping. The design and manufacture of the whole table contains the gather mechanism, a yarn tension control mechanism, a rolling mechanism, sliding control mechanism and dividing mechanism. Through the warping creel and Taiwan cooperation, realize super fine metal wire tension coiling, and monofilament uniform tension, yarn tension constant.

【学位授予单位】：天津工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TS916

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