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.
, [- Q3 P! J+ J; g4 `4 T! q* WNOTE:  CS=1000 ft/min for carbide insert used.

, T. X0 F- F  P7 Pso  RPM(1)=      
& S+ b/ D9 J2 R4 s3 i% |$ e0 I9 R    RPM(2)=
    RPM(3)=
    RPM(4)=

' \* L7 \$ e" v, p" v" W谢谢指教。