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.
! ]- Z% a4 [. A" \. d( s) zNOTE:  CS=1000 ft/min for carbide insert used.
  G5 `8 z9 v& H
so  RPM(1)=      
    RPM(2)=
% M4 {. _. W7 g0 K    RPM(3)=
    RPM(4)=

& P2 ?# }: }; u/ [. \/ f' G2 R1 j谢谢指教。