CUMULATIVE TOOL WEAR IN MACHINING METAL-MATRIX COMPOSITES .1. MODELING

Analytical models are derived for cumulative wear of facing and turnin g tools. An aluminium-based metal matrix composite reinforced with sil icon carbide particles was used to verify the validity of the models. Experimental data show that flank wear of a cutting tool does not depe nd on the order of different cutting speeds since abrasive wear domina tes the wear mechanism. Since the data for turning and facing are corr elated, it is more economical to rank machinability using data for fac ing, and to convert them for turning if required.