CNC题目,再请教。

27149

A 6.5 inch dia shaft is to be machined on a TURNING CTR to 4.5 inch dia in 4 equal cuts. If CONSTANT CS is selected calculate the RPM at the beginning of each cut.
6 l2 I* H1 I' b  z+ a# ?: C* vNOTE:  CS=1000 ft/min for carbide insert used.

so  RPM(1)=      
3 D1 J8 X1 @% p  [# H    RPM(2)=
9 R, k% L( I! a2 k9 A    RPM(3)=
    RPM(4)=

. P9 G, u2 J% W0 `+ I9 P; |# m谢谢指教。