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.

' h* v( q1 _$ W( C& I% b1 pso  RPM(1)=      
9 O- h6 l9 [# R! `9 Q    RPM(2)=
    RPM(3)=
    RPM(4)=

" V; K+ @$ Y4 C! B  @/ G. S/ e谢谢指教。