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.

so  RPM(1)=      
    RPM(2)=
    RPM(3)=
) G8 E  w5 Q" }4 X/ z+ z    RPM(4)=
; k& J! S+ @) ^' _5 o) I
! H( @2 a  I# `  D. Q7 E谢谢指教。