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.
( J, S; F# m' n9 p* `7 [$ rNOTE:  CS=1000 ft/min for carbide insert used.

so  RPM(1)=      
    RPM(2)=
3 W; w1 n2 G4 {; [  b    RPM(3)=
    RPM(4)=
. E  C0 }2 T4 X0 k
谢谢指教。