【摘要】 熔融沉积技术(FDM)是应用最为广泛的增材制造技术之一。其制造产品存在层间黏结强度不够而发生断裂现象，层间孔隙是主要影响因素之一。提出错层切片算法，通过交错排列同层纤维，采用PLA材料制作标准样件，观察样件层间孔隙面积变化；然后对样件进行拉伸和弯曲测试验证错层切片对层间黏结强度的影响，并确定最优错层高度；最后对错层打印模型进行偏差分析，探究其对模型精度的影响。测试表明：弯曲强度在错层高度为0.075 mm时达到最大18.62 MPa,提升7.69%;错层高度为0.112 5 mm时，壳体截面上层间孔隙面积最小，相较于常规打印孔隙面积减小66.33%,拉伸强度为12.93 MPa,提升30.73%,并且错层打印模型偏差与常规打印无明显差异。更多还原

【Abstract】 Fused deposition(FDM)was one of the most widely used additive manufacturing technologies.Its manufacturing products had insufficient interlayer bonding strength and fracture phenomenon, and interlayer porosity was one of the main influencing factors.In this study, a split-layer sectioning algorithm was proposed, and standard samples were made by polylactic acid(PLA)materials, which were used to make standard samples by staggering the fibers of the same layer, and the pore area changes between the layers of the samples were observed.Then, the influence of split-layer sections on the bonding strength between laminar layers was verified by tensile experiment and bending experiment, and the optimal split-layer value was determined.Finally, the deviation analysis of the split-layer printing model was carried out to explore its influence on the accuracy of the model.The test shows that the bending strength reaches a maximum of 18.62 MPa when the split-layer value is 0.075 mm, which is increased by 7.69%.When the split-layer value is 0.112 5 mm, the pore area between the upper layers of the shell section is the smallest, which is 66.33%lower than that of conventional printing, and the tensile strength is 12.93 MPa, an increase of 30.73%,and the deviation of the cross-layer printing model is not significantly different from that of conventional printing.更多还原