摘要
快速成型能将CAD模型转化为实物模型,但材料的收缩变形可能导致成型件尺寸出现较大的偏差。为保证快速原型件能合理装配,以孔轴类零件配合为研究对象,利用熔融堆积成型原理对ABS材料进行成型实验,运用回归分析法研究发现,孔轴原型件收缩与尺寸存在着线性关系。对原型件变形机理进行实验分析可知,当材料填充率在10%~40%之间时,轴的圆度误差较小。利用这些成型规律及特性对模型进行处理,可保证装配的合理性和打印零件的质量。
Rapid prototyping can cause large deviation of the molding size in CAD model transformation for physical model.In order to ensure the reasonable assembly of the rapid prototyping part,the forming experiment of ABS material was carried out by the principle of FDM on the object of hole and axis. Through regression analysis,a linear relationship with the molding shrinkage and model size of hole and axis was found. Meanwhile,deforming mechanism was analyzed with the prototyping parts,also the experiment of axis roundness error was done to verify its small value within 10% and 40% of material filling rate. By these law and characters the model can be pre-processed to ensure the rationality of assembly and quality of print parts.
出处
《世界科技研究与发展》
CSCD
2015年第5期477-480,共4页
World Sci-Tech R&D
基金
上海市教委重点项目(BJYXX13YYYJ00)
上海高校实验技术队伍建设计划(A1-5300-14-020309)资助
