Development of an Energy Consumption Estimation Model for Feed Drive Systems in NC Machine Tools

Since several tool paths exist for machining of a product with NC machine tools, it is difficult to plan a suitable tool path. In addition, the energy consumption of tool paths that generate the same shape is different. From this point of view, it is expected that the optimum tool path can be designed based on the energy consumption. This study developes an energy consumption estimation model for feed drive systems in NC machine tools. In the model, realationships between feed rate and power consumption are modeled based on the velocity dependent frictuon model. Power losses of motors and amplifiers are also modeled based on the measured results. As the results, it is confirmed that the proposed estimation model can estimate the energy consumption in actual tool paths