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.

so  RPM(1)=      
6 T8 w6 y+ D2 R) t9 I( E, y% E; S    RPM(2)=
, O  u# X- u& T1 p2 F. h    RPM(3)=
    RPM(4)=
" i& [& h3 M9 a7 Z1 _
" {& Y4 G6 C) ], ]谢谢指教。