Research on Tension Adaptive Control Method and Device Optimization for 3D Printing Technology of Continuous Fiber

doi:10.3901/JME.2025.05.250

Abstract

Abstract: 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.

Key words: continuous fiber, 3D printing, tension control, adaptive method, control accuracy

CLC Number:

TD406

LIU Xiaojun, SHAN Zhongde, LIU Jianhua, LIU Feng, LI Zhikun, ZHANG Jingke, GUO Zhenzhen. Research on Tension Adaptive Control Method and Device Optimization for 3D Printing Technology of Continuous Fiber[J]. Journal of Mechanical Engineering, 2025, 61(5): 250-262.

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