유리섬유강화수지의 절삭특성

On cutting characteristics of glass fiber reinforced plastic

The purpose of this study is to understand the cutting characteristics of glass-fiber rein- forced plastic (GFRP) by investigating the variation of cutting force and surface roughness, depending on the amount fo flank wear and cutting conditions. And a Taylor type tool life equation is derived using the regression analysis. The present study reveals that, 1. Taylor's eqquation can be applicable to GFRP nd the constants n (0.170-0.175) and C (53.7- 64.4) are smaller than those in cutting of steel. 2. Principal cutting force increases sharply with the increase of feed rate, but feed force and radial force are almost constant. This result is quite different from that of metal cutting. 3. Cutting forces ($F_P, \;F_Q, \;F_R$) increase with the increase of flank wear, and feed force especially increases sharply with the increase of flank wear. 4. Surface roughness changes very much along the circumference of the workpiece and the amount of flank wear has almost no effect on surface roughness.