为了提高金属微滴打印成形工件的效率,分析了逐层光栅扫描模式下影响打印成形效率的主要因素,计算了金属微滴在不同旋转角度(θ)光栅扫描路径下,打印成形同一个层面所需的喷射启停次数、跳转路径、微滴沉积路径和总平台运动路径等。结...为了提高金属微滴打印成形工件的效率,分析了逐层光栅扫描模式下影响打印成形效率的主要因素,计算了金属微滴在不同旋转角度(θ)光栅扫描路径下,打印成形同一个层面所需的喷射启停次数、跳转路径、微滴沉积路径和总平台运动路径等。结果表明:在设定相匹配的微滴喷射频率与沉积平台运动速度条件下,减少喷射启停次数和缩短空跳转路径是提高成形效率的主要途径。依据上述研究结果,采用D=0.2mm的Sn60/Pb40微滴打印成形微小多孔零件,耗时约为4 h 20 min,显著提高了打印成形零件的效率。展开更多
Incorporating aluminum particles into viscous medium was proposed to improve the thermal conductivity of the viscous medium and the efficiency of warm viscous pressure forming(WVPF)process.The influence of aluminum pa...Incorporating aluminum particles into viscous medium was proposed to improve the thermal conductivity of the viscous medium and the efficiency of warm viscous pressure forming(WVPF)process.The influence of aluminum particles on a viscous medium was investigated through settling,thermal conductivity,and compression experiments.Warm viscous pressure bulging(WVPB)experiments were conducted on polyetherimide(PEI)and AZ31B magnesium alloy sheets to determine the influence of the aluminum particles size and fraction on the forming efficiency and formed specimens based on the heating preparation times and profile curves,wall thicknesses and surface roughness values of the bulging specimens.The results show that the thermal conductivity of the viscous medium and the WVPF efficiency can be greatly improved via the addition aluminum particles with appropriate size and fraction under certain temperature condition,but have less influence on other properties of viscous medium.展开更多
文摘为了提高金属微滴打印成形工件的效率,分析了逐层光栅扫描模式下影响打印成形效率的主要因素,计算了金属微滴在不同旋转角度(θ)光栅扫描路径下,打印成形同一个层面所需的喷射启停次数、跳转路径、微滴沉积路径和总平台运动路径等。结果表明:在设定相匹配的微滴喷射频率与沉积平台运动速度条件下,减少喷射启停次数和缩短空跳转路径是提高成形效率的主要途径。依据上述研究结果,采用D=0.2mm的Sn60/Pb40微滴打印成形微小多孔零件,耗时约为4 h 20 min,显著提高了打印成形零件的效率。
基金Project(51575364)supported by the National Natural Science Foundation of ChinaProject(2014ZE54024)supported by the Aviation Science Foundation of ChinaProject(LJQ2015083)supported by the Liaoning Excellent Talents in University,China
文摘Incorporating aluminum particles into viscous medium was proposed to improve the thermal conductivity of the viscous medium and the efficiency of warm viscous pressure forming(WVPF)process.The influence of aluminum particles on a viscous medium was investigated through settling,thermal conductivity,and compression experiments.Warm viscous pressure bulging(WVPB)experiments were conducted on polyetherimide(PEI)and AZ31B magnesium alloy sheets to determine the influence of the aluminum particles size and fraction on the forming efficiency and formed specimens based on the heating preparation times and profile curves,wall thicknesses and surface roughness values of the bulging specimens.The results show that the thermal conductivity of the viscous medium and the WVPF efficiency can be greatly improved via the addition aluminum particles with appropriate size and fraction under certain temperature condition,but have less influence on other properties of viscous medium.
