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.
* Z( g* E5 D+ u& \
( J+ }7 W% P, r3 ~* i$ Z) g9 O* Jso  RPM(1)=      
    RPM(2)=
4 l; ?! i& Z9 Y* H5 h' o0 l    RPM(3)=
    RPM(4)=
4 o. Z4 ~/ w, y$ f
5 P% l. {8 r, G5 z7 T: z* m: u' n谢谢指教。