Analysis on machine tool energy consumption based on ultra-fine cemented carbide grinding process

For the grinding of ultra-fine cemented carbide, the machine tool energy consumption was investigated through the power at various operating states and grinding parameters. The influence of grinding parameters on grinding energy consumption was characterized by grinding specific energy e_s and grinding effective energy efficiency η. The results show that the idle power accounts for 92% of the total grinding power of the grinding machine. The e_s increases slightly with the increase of wheel linear velocity v_s, and decreases with the increase of the grinding depth a_p and the workpiece feeding speed v_w. The v_w has the greatest influence on e_s, followed by a_p and v_s. Moreover, the η increases with the increase of a_p, v_s and v_w, respectively. The a_p has the greatest influence on η, followed by v_s and v_w. In order to reduce the grinding energy consumption during processing, the idle time should be minimized. Meanwhile, under the premise of ensuring machining quality, a larger a_p and v_w should be adopted during grinding the ultra-fine cemented carbide.