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.
/ }; E, |* o2 v- n$ w: s3 @% L: C5 N% JNOTE:  CS=1000 ft/min for carbide insert used.
8 K  I0 h8 |; [' F! |9 d6 R
so  RPM(1)=      
3 C1 s5 P5 T9 O) e' M" x: O5 j* n  Y    RPM(2)=
    RPM(3)=
    RPM(4)=
0 R; Q1 u* Y# l. p5 v" v( c
谢谢指教。