连续纤维 3D 打印张力自适应调控方法和装置优化研究

In 3D printing process of continuous fiber, the irregular and random movement of the printing nozzle easily leads to fiber relaxation. Aiming at the problem that mechanical or PID tension control methods can only achieve unidirectional tension adjustment and cannot achieve fiber withdrawal or bidirectional tension adjustment, a tension-adaptive bidirectional control method for continuous fiber in 3D printing process is proposed. Firstly, a tension-adaptive control system is designed, and a tension-adaptive bidirectional control device for continuous fiber is built to carry out tension experiments under different working conditions. Subsequently, the shortcomings of the initial device are analyzed and the device is structurally optimized. Finally, the tension control accuracy of the system under different working conditions before and after device optimization was studied. The results show that the tension adaptive control system has initially realized the tension control of continuous fiber at different winding speeds and tension setting values, and has the ability of rapid adjustment in the case of forward acceleration, reverse acceleration, and forward-reverse mixed speed changing process, and it can control the maximum error and average error of tension at 0.24 N and 0.097 N. After device optimization, the control accuracy of the system is significantly improved, and the maximum and average errors of tension are reduced to 0.16 N and 0.065 2 N.