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.
. W8 Z6 `$ H1 b; p3 z, Y$ b" T
. ?" w% H, t, y) t3 Eso  RPM(1)=      
6 U- F+ O7 P8 i& q    RPM(2)=
    RPM(3)=
    RPM(4)=
. L1 w; v" ]3 j) G" {' E: z
$ A( q3 i/ r+ P  U9 G$ y谢谢指教。