Content Framework and Evaluating Method of the Energy Efficiency Assessment Standard for Machining period

Abstract

Energy efficiency assessment is the precondition of energy optimization of machining period, and a set of standardized energy efficiency assessment system can help the optimization of machining period; therefore, the energy efficiency assessment standard for machining period is studied, and the content framework and evaluating method of energy efficiency assessment standard of machining period are proposed. The first step of the evaluating method is to establish the mathematic model of energy efficiency assessing standard, including the energy equation and power equilibrium equation of machining, which are the theoretical basis of the standard; the second step is to set up the energy efficiency assessing indexes including energy utilization ratio and specific energy consumption; the third step is to give the method for obtaining energy efficiency assessing indexes based on the combination of off-line basic data acquiring and on-line input power monitoring. The case study shows that the energy efficiency indexes can be gotten by the proposed evaluating method with enough precision, and only input power of the machining period should be monitored on the site. The results can support the energy efficiency assessment and optimization of machine tools and work-pieces.