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.
7 f) N$ X( M# Y9 o4 m% G" FNOTE:  CS=1000 ft/min for carbide insert used.
6 a! _+ |  I& [8 n! g
9 `! R+ A. B- W$ \  zso  RPM(1)=      
    RPM(2)=
) s% s1 c. n1 T/ U, m    RPM(3)=
    RPM(4)=
( X; z' v" Y% w
谢谢指教。