摘要
连续碳纤维复合材料3D打印对于纤维分布的方向性和打印路径的连续性均提出了需求。对于各向同性的三维模型,传统路径规划采用层间变向扫描式或螺旋偏置路径规划算法,对于变向扫描路径规划算法是通过使用若干层单向纤维路径通过不同层扫描方向的改变来拟合整体纤维取向分布,其各层的实质依然是单向性的;螺旋偏置路径规划算法则难以针对不同子区域填充路径实现连续。针对这一问题,提出面向碳纤维3D打印的全局连续费马螺旋路径规划算法。基于偏置填充路径规划算法,保证层内纤维取向合理分布;通过偏置环数据预处理,保证路径规划点信息的正确性;通过偏置环关系的判断与旋入旋出点的计算构建全局连续性路径;通过规划文件的空间优化,减少打印路径点避免喷头的反复起停,生成用于连续碳纤维3D打印的Gcode文件。通过不同模型路径规划算法仿真对比和打印实验,验证了该算法的有效性。
Continuous carbon fiber composite 3D printing puts demands on both the directionality of fiber distribution and the continuity of the tool path.For isotropic models,the traditional path planning algorithm adopts inter-layer variable directional scanning filling or spiral flling methods.The scanning method uses several layers of unidirectional fiber paths to fit the overall fiber orientation distribution by changing the scanning direction of diferent layers.The essence of each layer is still unidirectional.The spiral method is difficult to achieve continuity for different sub-region filling paths.To address this problem,a global continuous Fermat spiral path planning method for carbon fiber 3D printing is proposed.Based on the spiral flling algorithm,the method ensures the reasonable distribution of fiber orientation within the layer;through the contour line data pre-processing,the method ensures the correctness of the path planning point information;through the judgment of the contour line relation and the calculation of the spin-in and spin-out points,the global continuous path is built;through the spatial optimization of the Gcode file,the method reduces the tool path points to avoid the repeated start and stop of the print head,and generates the Gcode file for continuous carbon fiber 3D printing.The effectiveness of the global continuous isotropic path planning method is verified by comparing different model path planning simulations and printing experiments.
作者
蔚晟楠
张帆
谭跃刚
赵圆圆
涂一文
YU Shengnan;ZHANG Fan;TAN Yuegang;ZHAO Yuanyuan;TU Yiwen(School of Electrical and Mechanical Engineering,Wuhan University of Technology,Wuhan 430070,China)
出处
《机械设计与研究》
CSCD
北大核心
2023年第4期166-172,共7页
Machine Design And Research
关键词
碳纤维3D打印
熔融沉积
全局连续费马螺旋
路径优化
各向同性
carbon fiber 3D printing
fused deposition modeling
continuous fermat spiral
path optimization
isotropy
