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.
5 W( U8 o* G$ ^( J8 QNOTE:  CS=1000 ft/min for carbide insert used.

3 s* t& M/ @& X0 Q$ h! A& Oso  RPM(1)=      
    RPM(2)=
9 Y7 o0 a( g6 y4 h, T: i    RPM(3)=
    RPM(4)=
) ~+ t6 J! }, q8 v
谢谢指教。