工艺与制造英文2023被引 1
机器人3D打印连续碳纤维增强复合材料中孔隙的最小化
Minimizing voids in continuous carbon fiber-reinforced composites made by robotic 3D printing
Jash Rana · Metropolitan University
摘要整理
本研究针对机器人3D打印连续碳纤维增强复合材料的工艺参数进行优化，以最小化分层、间隙、纤维缠结、非线性带状材料固结和孔隙等缺陷。采用ABB IRB 1200-05/0.9六轴机器人配合自主设计的3D打印头制造试样。探索了X轴和Y轴两种打印方向。X轴和Y轴打印方向的最大打印高度变化分别为25.4 μm（0.001英寸）和63.5 μm（0.0025英寸）。X轴打印因其末端执行器高度变化小、带状材料沉积更均匀而被确定为最优打印方向，X轴和Y轴打印的变异系数分别为0.39和1.88。间隙由打印头相对于层叠带状材料运动产生的张力形成，该张力导致带状材料翘曲并变窄。单条带状材料以10.1 mm/s速度打印时，打印带宽小于标称宽度。基于此观察，选择最小带状材料栅栏偏移量（TRO）为5.50 mm。5.50 mm TRO试样的显微照片显示相邻带状材料界面处存在重叠，这些重叠导致重叠层之间形成大量孔隙。采用更大TRO值打印的试样显示相邻带状材料之间的间隙逐渐增大。研究结果为机器人3D打印工艺参数的优化提供了重要指导。
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