直线式拉丝机恒张力拉拔控制系统的研究

摘要

Aiming at the problem of tension control in the drawing process of straight￣line drawing machine, this paper presents a new constant￣tension control system based on tile sensor. The speed of pre and post passes is tracked automatical y by adjusting the motor speed of the pre pass. The tilt sensor is used to measure the swing angle of the swing link in the tension tuning rol er. By analyzing the geometric relationship between swing angle and the wire length between pre and post passes, the mathematical model of the speed change between pre and post passes and the change of swing angle of the swing link is established. PLC,VVVF control of induction motor and PID control algorithms are applied in the control system. The model of speed control system in the drawing process between pre and post passes is established and simulated by Matlab/Simulink. The results show that this control system can be recovered to the stable working state quickly. Besides,it is of perfect dynamic performance and strong anti￣interference ability.%针对直线式拉丝机拉拔过程中的张力控制问题，设计了基于倾角传感器的恒张力拉拔控制系统，通过调节前一道次电机转速，使得前后道次速度自动跟踪匹配。将倾角传感器用于检测张力调谐辊摆杆摆角，通过分析摆杆摆角与前后两道次间金属丝长度的几何关系，建立了前后两道次速度变化与调谐辊摆杆摆角变化之间的数学模型，并将PLC技术、异步电机变频调速技术与PID控制算法运用于该系统中，建立了拉丝过程前后道次速度控制系统模型，并在Matlab/Simulink上进行仿真。仿真结果表明，该控制系统能较快地恢复到平衡工作状态，具有较好的动态性能和较强的抗干扰能力。