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.
7 ]  S) l9 }2 ^! W9 Z* p& _
so  RPM(1)=      
4 _* S$ ^( j3 }0 [9 `/ q    RPM(2)=
    RPM(3)=
    RPM(4)=
/ N3 ?5 q- O, s
- J0 F! l* n1 X& r$ ]谢谢指教。