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.
. o5 \) X5 K0 {5 T* F
so  RPM(1)=      
# o! p% ?4 S7 b3 z" Q- |! w$ d    RPM(2)=
    RPM(3)=
8 t2 e% b0 {: P  [! X& s9 f1 T    RPM(4)=
7 b6 g$ a) J5 p2 F; u, ]2 G- {5 t/ @9 b
) Q) V2 h6 P* G9 p0 t, z# Y" a谢谢指教。