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.
NOTE:  CS=1000 ft/min for carbide insert used.
$ S+ G6 B+ G: Y" Y& P
+ m# D. r8 A/ ^; x- C2 Uso  RPM(1)=      
+ a) y$ z- ~; z' A    RPM(2)=
7 {) Z2 K6 ]% K8 ?& U    RPM(3)=
    RPM(4)=
% }: e1 G0 e# B8 L4 c
3 k& r; {/ c2 u( {6 I' l2 Y$ f谢谢指教。