人工骨3D打印与铣削复合加工研究

Study on combined machining of artificial bone by 3D printing and milling

针对人工骨高效精密制造的需求,展开PEEK材料人工骨高效3D打印与精密铣削复合加工研究。基于响应面方法,以PEEK材料人工骨制造的高储能模量、高效率、低耗材和高表面质量为目标,建立FDM型3D打印与铣削工艺参数的响应值回归数学模型,并据此进行工艺参数优化。得出3D打印最优参数组合为:层厚0.43 mm,内部填充密度55.05%,外周轮廓1.39圈。铣削最优参数组合为:背吃刀量0.2 mm,主轴转速3 500 r/min,进给量0.06 mm。进一步的复合加工试验验证了所构建的数学模型及优化的参数。该研究为PEEK材料人工骨的高效精密制造提供了一种复合加工方法,并奠定了复合加工的工艺参数基础。

Considering the demand of the efficient and precise manufacturing of artificial bone, the research on compound processing of 3D printing and milling are carried out for artificial bone material PEEK. Ai- ming at the high storage modulus, high efficiency, low consumables and high surface quality, a response regression mathematical models of parameters are established based on the response surface method, and the optimized process parameters are obtained. The obtained optimal parameters of 3D printing are that the layer thickness is 0. 43 mm, the internal packing density is 55.05% and the outer contour is 1.39. The optimal parameters of milling are that the depth of cut is 0.2 mm, the spindle speed is 3 500 r/min and the feed is 0. 06 ram. Meanwhile, the mathematical models and the optimized parameters are veri- fied by the further compound machining experiments. It not only provides a composite processing method for the fabrication of artificial bone material PEEK, and also establishes the foundation for process pa- rameters of composite processing.