Investigation on Improving Bottom Flatness in Electrochemical Mill-Grinding
NIU Shen1 , QU Ningsong 1,2, LI Hansong 1,2
(1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; 2. Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology, Nanjing 210016, China)
Abstract：The effect of the tool-bottom insulation layer on machining performance in electrochemical mill-grinding is investigated by performing the bottom insulation design for a tool substrate with both the outer diameter and the cutting depth of 10mm. The results show that it can significantly improve the overcut, flatness and surface quality of the slot bottom by using the abrasive tool with bottom insulation. Under an applied voltage of 30V, a cutting depth of 10mm and a feed rate of 2.7mm/min, etc, the average slot depth, the maximum difference in bottom profile coordinates and the surface roughness obtained with the uninsulated tool are 10.61mm, 783.9μm and 1.705μm, but they are only 10.32mm, 352.5μm and 0.811μm with the insulated tool, respectively.
2020, 
