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.
8 z  W  k# E& B/ @NOTE:  CS=1000 ft/min for carbide insert used.

5 P5 T8 Q/ _: o3 v: n! c0 ~% ]; yso  RPM(1)=      
    RPM(2)=
    RPM(3)=
! [0 s8 l: t- G2 B+ X0 U( d9 L# |    RPM(4)=

7 ^$ Z; j( @# a  J2 x9 H, A7 V' }谢谢指教。