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.
6 t9 @2 y1 p# J4 B' ^% v5 jNOTE:  CS=1000 ft/min for carbide insert used.
" U8 h& c7 |1 A( O) @: V$ m" e0 {
so  RPM(1)=      
    RPM(2)=
7 a1 y4 K9 z! h5 G' @    RPM(3)=
    RPM(4)=

谢谢指教。