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* s" G+ d" e+ _$ `NOTE:  CS=1000 ft/min for carbide insert used.

so  RPM(1)=      
2 o( I* J) {% _( _  t& Z    RPM(2)=
' C5 h' O4 j: S* j  g" A( o5 o    RPM(3)=
    RPM(4)=

; @  Y. O* v  U& Z2 G谢谢指教。