Simulation and Analysis of Compaction Mechanism and Influencing Factors in Powder Compacting Process

The metal powder compaction process was simulated with MSC.MARC FEM analysis software.The simulation applied elastic-plastic large displacement analysis based on the updated Lagrangian method to study the principle of the impact of different compacting processes(compacting style,friction condition) on densification of me-tal powder in pipe green pressing process which have different side pressing parameters(K=4,6,8).The results show that double compaction process can improve the homogeneity of stress and density compared with single compaction.Improving friction condition is propitious to increase the displacement of metal powder,reduce stress concentration,decrease compaction pressure,and also improve the homogeneity of density in compacts.With the decrease of height-diameter ratio,the distribution of density in the compact become more uniform.