基于计算机辅助的聚乳酸3D打印工艺研究

以聚乳酸骨钉为例,利用计算机辅助技术对其加工温度、打印速率和冷却速率进行了优化,通过对制件尺寸精度和力学强度的模拟,得到了最佳加工工艺为供料段、压缩段和均化段温度分别为230,250,260℃;打印速率为70 mm/s,冷却速率为30℃/s。在该工艺下制得的骨钉制件尺寸精度和力学强度高。另外,还通过实际实验对模拟结果进行了验证,所得制件的尺寸误差和标准差均较小,力学强度为54.7–56.9 MPa,与模拟结果相近。将计算机辅助技术应用到3D打印工艺优化中,可使优化参数周期缩短,大幅提升工作效率。

Study on 3D Printing Processing of PLA Based on Computer Aided

Taking polylactic acid bone nail as an example,the processing temperature,printing rate and cooling rate were optimized by using computer-aided technology.Through the simulation of the dimensional accuracy and mechanical strength of the parts,the optimal processing conditions were obtained as follows:the temperature of feeding section,compression section and homogenization section were 230,250,260℃respectively,the printing rate was 70 mm/s,the cooling rate was 30℃/s.The results show that the precision of dimension and mechanical strength of bone nail are high.In addition,the simulation results are verified by actual experiments.The dimension error and standard deviation of the parts are small,and the mechanical strength is 54.7–56.9 MPa,which is close to the simulation results.By computer-aided technology being applied to 3D process optimization,the work efficiency can be greatly improved.