Abstract
This study aims to investigate machinability of carbon fiber reinforced plastic (CFRP) by grain refined Al based metal bond functionally graded grinding wheel (FGGW) containing diamond-composite particles. Diamond-composite particles which consist of nano-sized diamond particles and micro-sized green silicon carbide (GC) abrasive grains have been made by mechanofusion machine (Nobilta). The Al based metal bond FGGW was fabricated by reaction centrifugal mixed-powder (RCMP) method using mixed-powder of Al, Ti and diamond-composite particles. Since the formed Al3Ti phase acts as grain refiner, it is expected that the grain structure of Al matrix in FGGW fabricated by RCMP method with Ti particles becomes more refined than that fabricated without Ti particles. Using the fabricated FGGW, CFRP drilling tests were conducted by gyro-driving grinding wheel system. It is found that the FGGW fabricated by RCMP method with Ti particles have fine-grained Al matrix. It is also found that optimum additive amount of Ti on the FGGW is 4~6 mass%. It is concluded that the FGGW fabricated by RCMP method with Ti particles has better machinability of CFRP by gyro-driving grinding wheel system.
