Optimizing Process Performance Through Powder Rheology
In order to optimize productivity and achieve a high quality final product,compatibility of feedstock with both the manufacturing process and final application is critical.The range of unit operations which form typical manufacturing processes subject powders to extremes of stress and flow regimes; from the high stress,static conditions present in hoppers,to the low stress dynamic state of depositions.As such,powders can exhibit acceptable performance in one-unit operation but perform poorly another.It is therefore necessary to quantify powder behaviour using methods which represent the process conditions.This paper describes how powder rheology can be used to improve process efficiency across the manufacturing chain,from selecting the appropriate feedstock through to defining a design space for a unit operation and finally reducing wastage.The first case study describes an investigation into the influence of different suppliers and how production techniques can affect the performance of metal alloys.A second case study illustrates the construction of a design space for a filling operation.The final study assesses the reuse of metal powders to determine the optimal ratio of virgin to used feedstock for an additive manufacturing application.
Powder Rheology Feedstock Die Filling Design Space Additive Manufacturing
Lu Nephele Zhang George Freeman Tim
Freeman Technology,Shanghai 201103,China Freeman Technology,Tewkesbury,GL20 8DN,UK
国际会议
北京
英文
1545-1550
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）