ABSTRACT
The formation mechanism and geometry characteristics of exit-direction burrs in the surface grinding of Ti-6Al-4V titanium alloy by the brazed cubic boron nitride (CBN) grinding wheel were investigated based on finite element analysis in this chapter. Three types of burrs, i.e., positive burrs, negative burrs, and residual burrs, were classified. Meanwhile, the formation stages of different burrs were defined. The effects of three critical parameters in surface grinding (i.e., grinding speed, uncut chip thickness, and negative rake angle of CBN grains) on burr formation were discussed. Results obtained display that the burr height and root thickness increase with decreasing grinding speed, increasing uncut chip thickness, and decreasing rake angle magnitude of CBN grains. A positive burr, which is in favour of being removed easily and therefore lowering the machining cost, could be generated when a parameter combination (i.e., a higher grinding speed, a smaller uncut chip thickness, and a smaller magnitude of negative rake angle of CBN grain) is utilized.
