Influence factors and operational strategies for energy efficiency improvement of CNC machining

We investigated the energy consumption characteristics of CNC machining process and presented the energy efficiency models of CNC machining by adopting three different definitions, i.e., instantaneous energy efficiency, energy utilization ratio and specific energy efficiency. The critical factors which influence the energy efficiency of CNC machining are exploited through a theoretical analysis. For each influence factor, the operation strategies for energy efficiency improvement of CNC machining are analyzed at an operational level. The future research directions for energy efficiency improvement of CNC machining are identified and summarized through a review and research framework.243