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.
2 U% U7 ~8 l: T( E* f+ t9 D
so  RPM(1)=      
" ~9 h) L7 P! k6 w7 R$ a( z; ]    RPM(2)=
! O* L5 g8 G; a% J3 U/ Q: i6 b    RPM(3)=
2 k% h! w  p1 W  h5 i" I0 h    RPM(4)=
$ b3 B; C5 D2 [; c" R
' c# H$ a8 \) c+ u6 t谢谢指教。