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.
4 I1 R# L2 `$ y' u8 I0 o' j2 DNOTE:  CS=1000 ft/min for carbide insert used.

% M# R( a+ c  R' \  h& eso  RPM(1)=      
  e4 S0 H# F1 L9 @    RPM(2)=
0 K- a4 ?5 f1 V/ G$ j    RPM(3)=
    RPM(4)=

! q' n7 g, A9 M( J# U# r谢谢指教。