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.
2 u- _7 [# \! A" J, d" xNOTE:  CS=1000 ft/min for carbide insert used.

so  RPM(1)=      
' P/ S) |9 k  O, F6 |1 Y7 B! A    RPM(2)=
& k$ K8 w$ T; X! P$ A    RPM(3)=
    RPM(4)=
2 @9 g7 q& f7 `7 w/ i/ m0 Z
谢谢指教。