FDM工艺出丝模型及补偿方法的研究

Research on Model of Extruding Filament and Compensation Method of Prototype Dimensions in FDM

在研究 FDM工艺喷头挤出丝截面形状的基础上 ,建立了理想轮廓线的补偿模型 ,并通过实例对该模型进行了验证。提出了根据挤出丝实际宽度 (而非喷嘴孔直径 )和零件尺寸实际收缩量补偿零件内外轮廓的新方法 ,即不仅要考虑材料收缩对零件“宏观”尺寸的影响 ,而且还需考虑材料收缩对“微观”尺寸——挤出丝截面宽度的影响。验证试验结果表明 ,应用所提出的补偿方法能对 FDM工艺原型尺寸进行正确补偿。

On the basis of research on extruded filament section shape, a compensation model of ideal contour line is established, and a new technique for compensating inner or outer contour line of the workpiece is put forward, which should depend on the real width of extruded filament (instead of nozzle radius) and the real dimensional shrinkage of the workpiece. The experimentally validated results prove that the compensation model of ideal contour line and the compensation technique for contour line of workpiece are correct and feasible.