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.
( q: W3 s/ V! A4 _NOTE:  CS=1000 ft/min for carbide insert used.
7 V& S8 \1 I( h* Y
) Y# Z* A) Y5 _% a1 Y/ V% q: Fso  RPM(1)=      
    RPM(2)=
    RPM(3)=
; B" Q+ s1 l% U+ d2 D6 W# f0 {    RPM(4)=
1 }/ R0 T* I9 V5 E* a( ^
谢谢指教。