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.
% [& h6 f# f2 ?- J6 YNOTE:  CS=1000 ft/min for carbide insert used.

so  RPM(1)=      
    RPM(2)=
    RPM(3)=
& z/ m: o! c, K    RPM(4)=
0 G* V' x% V9 u) ]. j* c
谢谢指教。