摘要
介绍了气压式熔融沉积系统的工作原理及工艺特点,提出了挤出丝的截面形状模型,建立了成型过程的数学物理方程,推出了理论丝宽的表达式,测量了AJS系统成型过程中不同温度和压力条件下材料的挤出速率,通过理论计算与实际测量结果的比较,确定了丝宽截面模型。最终根据得到的不同工艺条件下的丝宽值确定了扫描间距和轮廓补偿半径等工艺参数。
The work principle and technique characteristic of AJS （Air-pressure Jet Solidification System） were summarized. The section model of filament extruded was presented. The mathematical and physical equations were established to describe the molding process. In addition the theoretical expression of filament width was obtained. The extrusion rates of materials under different forming temperature and pressure conditions were measured. The model of filament width section was determined after a comparison of theoretical calculation values and measuring results. Finally the technological parameters of scan spacing and contour compensation radius were determined according to filament width values under different technique conditions.
出处
《模具工业》
北大核心
2007年第2期53-57,共5页
Die & Mould Industry
关键词
熔融沉积成型
气压式熔融沉积系统
工艺参数
fused deposition molding
air-pressure jet solidification system
technological parameter
