圧粉時の密度差を利用した金属・セラミックスの三次元積層造形

概要

論文の詳細を見る
A three-dimensional fabrication method for metallic and ceramic tools is proposed. In this process, models are produced by compacting the powdered material with subsequent milling of grooves in layer-by-layer, and the density distribution caused around the grooves in the compacting processes is utilized for the model separation. To determine the optimum working conditions such as layered pitch and the dimension of the grooves, the density distribution is estimated by simulation using the rigid-plastic finite element method. A relation between the relative density and the transverse strength is measured for the tungsten carbide powder used in this research. It is found that the relative density inside the grooves decreases with the decreases of the ratio of width of the groove and layered pitch, and that the model parts can be separated according to the grooves when the transverse strength ratio of the model area and the groove area is greater than 8. Employing these conditions, a tungsten carbide truncated cone model is successfully fabricated.
公益社団法人精密工学会の論文
2003-09-05