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.
5 e/ I( O3 V0 O+ }5 S% BNOTE:  CS=1000 ft/min for carbide insert used.
# n. O; m: f5 G  U) N
& D& l8 h5 g+ z+ l* A! f' fso  RPM(1)=      
    RPM(2)=
    RPM(3)=
    RPM(4)=
5 W' p* n1 H" c/ ]2 }1 L# c4 G4 ~
9 T# [: F# S5 j$ A# C( J- J* C谢谢指教。