Influence of Tool Inclination on Micro-Ball-End Milling of Quartz Glass
Glass is difficult to machine due to its susceptibility to brittle fracture during machining. Tool tilt angle can exert a remarkable effect on the surface finish of glass in micro-ball-end milling. On the basis of a theoretical analysis and simulation by three-dimensional discrete element method, an optimal mathematical model is constructed for tool inclination, which is governed by edge radius of ball-nose of end-mill and cutting thickness. Corresponding experiments are conducted for model verification. The results show that different cutting thicknesses, cutter shapes, and spindle speeds have a considerable influence on machining mechanics of glass.
Keywords: Micro-ball-end mill, Quartz glass, Simulation, Tool inclination