一种提高FDM三维打印系统成型效率的算法

目前,FDM三维打印系统制件加工时间比较长,成型效率较低。在权衡加工时间和加工精度的前提下,从切片层厚和层扫描速度控制的角度,提出了一种基于面积变化率的自适应切片层厚控制和基于周长变化率的自适应层扫描速度控制相结合的算法。首先通过二维轮廓面积变化情况计算每层切片数据的层厚值;然后用获得的层厚数据对模型进行切片,得到每层可打印的真实轮廓;最后计算每层二维多边形轮廓的周长,并根据周长的变化情况确定该层合适的扫描速度。实际打印测试结果表明,该算法可以有效降低打印时间,提高成型效率,验证了算法的有效性。

An Algorithm for Improving Efficiency of Fused Deposition Molding 3D Printing System

Currently, the FDM （Fused Deposition Modeling） 3D printing system is conducted with long time and low efficiency. Considering process time and process accuracy, in control perspective of slice thickness and scan speed, an algorithm is proposed to reduce printing time and improve molding efficiency, which combining adaptive slice thickness based on the rate of change of the area and adaptive scan speed based on the rate of change of the perimeter. Firstly, the rate of change of the area is used to calculate the value of slicing thickness of each layer. According to the slicing data, then the mesh is sliced to obtain actual printing contours of each layer. Finally, the perimeter of two - dimensional polygon of each layer is computed and the rate of change of the perimeter is used to determine the appropriate scanning speed of each layer. The actual printing test results validate the feasibility of the proposed algorithm and show that it can effectively reduce the printing time and improve the efficiency of forming.